diff options
Diffstat (limited to 'target/linux/omap24xx/patches-2.6.35/500-cbus.patch')
| -rw-r--r-- | target/linux/omap24xx/patches-2.6.35/500-cbus.patch | 4624 |
1 files changed, 0 insertions, 4624 deletions
diff --git a/target/linux/omap24xx/patches-2.6.35/500-cbus.patch b/target/linux/omap24xx/patches-2.6.35/500-cbus.patch deleted file mode 100644 index 231daaecea..0000000000 --- a/target/linux/omap24xx/patches-2.6.35/500-cbus.patch +++ /dev/null @@ -1,4624 +0,0 @@ ---- - arch/arm/Kconfig | 4 - drivers/Makefile | 2 - drivers/cbus/Kconfig | 89 ++++ - drivers/cbus/Makefile | 14 - drivers/cbus/cbus.c | 309 ++++++++++++++++ - drivers/cbus/cbus.h | 36 + - drivers/cbus/retu-headset.c | 356 ++++++++++++++++++ - drivers/cbus/retu-pwrbutton.c | 118 ++++++ - drivers/cbus/retu-rtc.c | 477 ++++++++++++++++++++++++ - drivers/cbus/retu-user.c | 425 ++++++++++++++++++++++ - drivers/cbus/retu-wdt.c | 388 ++++++++++++++++++++ - drivers/cbus/retu.c | 468 ++++++++++++++++++++++++ - drivers/cbus/retu.h | 77 ++++ - drivers/cbus/tahvo-usb.c | 788 +++++++++++++++++++++++++++++++++++++++++ - drivers/cbus/tahvo-user.c | 407 +++++++++++++++++++++ - drivers/cbus/tahvo.c | 443 +++++++++++++++++++++++ - drivers/cbus/tahvo.h | 61 +++ - drivers/cbus/user_retu_tahvo.h | 75 +++ - 18 files changed, 4536 insertions(+), 1 deletion(-) - ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/cbus.c -@@ -0,0 +1,309 @@ -+/* -+ * drivers/cbus/cbus.c -+ * -+ * Support functions for CBUS serial protocol -+ * -+ * Copyright (C) 2004, 2005 Nokia Corporation -+ * -+ * Written by Juha Yrjölä <juha.yrjola@nokia.com>, -+ * David Weinehall <david.weinehall@nokia.com>, and -+ * Mikko Ylinen <mikko.k.ylinen@nokia.com> -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#include <linux/device.h> -+#include <linux/init.h> -+#include <linux/kernel.h> -+#include <linux/delay.h> -+#include <linux/spinlock.h> -+#include <linux/gpio.h> -+#include <linux/platform_device.h> -+#include <linux/slab.h> -+ -+#include <asm/io.h> -+#include <asm/mach-types.h> -+ -+#include <plat/board.h> -+#include <plat/cbus.h> -+ -+#include "cbus.h" -+ -+struct cbus_host *cbus_host = NULL; -+EXPORT_SYMBOL(cbus_host); -+ -+#ifdef CONFIG_ARCH_OMAP1 -+/* We use our own MPUIO functions to get closer to 1MHz bus speed */ -+ -+static inline void cbus_set_gpio_direction(u32 base, int mpuio, int is_input) -+{ -+ u16 w; -+ -+ mpuio &= 0x0f; -+ w = __raw_readw(base + OMAP_MPUIO_IO_CNTL); -+ if (is_input) -+ w |= 1 << mpuio; -+ else -+ w &= ~(1 << mpuio); -+ __raw_writew(w, base + OMAP_MPUIO_IO_CNTL); -+ -+} -+ -+static inline void cbus_set_gpio_dataout(u32 base, int mpuio, int enable) -+{ -+ u16 w; -+ -+ mpuio &= 0x0f; -+ w = __raw_readw(base + OMAP_MPUIO_OUTPUT); -+ if (enable) -+ w |= 1 << mpuio; -+ else -+ w &= ~(1 << mpuio); -+ __raw_writew(w, base + OMAP_MPUIO_OUTPUT); -+} -+ -+static inline int cbus_get_gpio_datain(u32 base, int mpuio) -+{ -+ mpuio &= 0x0f; -+ -+ return (__raw_readw(base + OMAP_MPUIO_INPUT_LATCH) & (1 << mpuio)) != 0; -+} -+ -+static void cbus_send_bit(struct cbus_host *host, u32 base, int bit, -+ int set_to_input) -+{ -+ cbus_set_gpio_dataout(base, host->dat_gpio, bit ? 1 : 0); -+ cbus_set_gpio_dataout(base, host->clk_gpio, 1); -+ -+ /* The data bit is read on the rising edge of CLK */ -+ if (set_to_input) -+ cbus_set_gpio_direction(base, host->dat_gpio, 1); -+ -+ cbus_set_gpio_dataout(base, host->clk_gpio, 0); -+} -+ -+static u8 cbus_receive_bit(struct cbus_host *host, u32 base) -+{ -+ u8 ret; -+ -+ cbus_set_gpio_dataout(base, host->clk_gpio, 1); -+ ret = cbus_get_gpio_datain(base, host->dat_gpio); -+ cbus_set_gpio_dataout(base, host->clk_gpio, 0); -+ -+ return ret; -+} -+ -+#define cbus_output(base, gpio, val) cbus_set_gpio_direction(base, gpio, 0) -+ -+#else -+ -+#define cbus_output(base, gpio, val) gpio_direction_output(gpio, val) -+#define cbus_set_gpio_dataout(base, gpio, enable) gpio_set_value(gpio, enable) -+#define cbus_get_gpio_datain(base, int, gpio) gpio_get_value(gpio) -+ -+static void _cbus_send_bit(struct cbus_host *host, int bit, int set_to_input) -+{ -+ gpio_set_value(host->dat_gpio, bit ? 1 : 0); -+ gpio_set_value(host->clk_gpio, 1); -+ -+ /* The data bit is read on the rising edge of CLK */ -+ if (set_to_input) -+ gpio_direction_input(host->dat_gpio); -+ -+ gpio_set_value(host->clk_gpio, 0); -+} -+ -+static u8 _cbus_receive_bit(struct cbus_host *host) -+{ -+ u8 ret; -+ -+ gpio_set_value(host->clk_gpio, 1); -+ ret = gpio_get_value(host->dat_gpio); -+ gpio_set_value(host->clk_gpio, 0); -+ -+ return ret; -+} -+ -+#define cbus_send_bit(host, base, bit, set_to_input) _cbus_send_bit(host, bit, set_to_input) -+#define cbus_receive_bit(host, base) _cbus_receive_bit(host) -+ -+#endif -+ -+static int cbus_transfer(struct cbus_host *host, int dev, int reg, int data) -+{ -+ int i; -+ int is_read = 0; -+ unsigned long flags; -+ u32 base; -+ -+#ifdef CONFIG_ARCH_OMAP1 -+ base = OMAP1_IO_ADDRESS(OMAP1_MPUIO_BASE); -+#else -+ base = 0; -+#endif -+ -+ if (data < 0) -+ is_read = 1; -+ -+ /* We don't want interrupts disturbing our transfer */ -+ spin_lock_irqsave(&host->lock, flags); -+ -+ /* Reset state and start of transfer, SEL stays down during transfer */ -+ cbus_set_gpio_dataout(base, host->sel_gpio, 0); -+ -+ /* Set the DAT pin to output */ -+ cbus_output(base, host->dat_gpio, 1); -+ -+ /* Send the device address */ -+ for (i = 3; i > 0; i--) -+ cbus_send_bit(host, base, dev & (1 << (i - 1)), 0); -+ -+ /* Send the rw flag */ -+ cbus_send_bit(host, base, is_read, 0); -+ -+ /* Send the register address */ -+ for (i = 5; i > 0; i--) { -+ int set_to_input = 0; -+ -+ if (is_read && i == 1) -+ set_to_input = 1; -+ -+ cbus_send_bit(host, base, reg & (1 << (i - 1)), set_to_input); -+ } -+ -+ if (!is_read) { -+ for (i = 16; i > 0; i--) -+ cbus_send_bit(host, base, data & (1 << (i - 1)), 0); -+ } else { -+ cbus_set_gpio_dataout(base, host->clk_gpio, 1); -+ data = 0; -+ -+ for (i = 16; i > 0; i--) { -+ u8 bit = cbus_receive_bit(host, base); -+ -+ if (bit) -+ data |= 1 << (i - 1); -+ } -+ } -+ -+ /* Indicate end of transfer, SEL goes up until next transfer */ -+ cbus_set_gpio_dataout(base, host->sel_gpio, 1); -+ cbus_set_gpio_dataout(base, host->clk_gpio, 1); -+ cbus_set_gpio_dataout(base, host->clk_gpio, 0); -+ -+ spin_unlock_irqrestore(&host->lock, flags); -+ -+ return is_read ? data : 0; -+} -+ -+/* -+ * Read a given register from the device -+ */ -+int cbus_read_reg(struct cbus_host *host, int dev, int reg) -+{ -+ return cbus_host ? cbus_transfer(host, dev, reg, -1) : -ENODEV; -+} -+EXPORT_SYMBOL(cbus_read_reg); -+ -+/* -+ * Write to a given register of the device -+ */ -+int cbus_write_reg(struct cbus_host *host, int dev, int reg, u16 val) -+{ -+ return cbus_host ? cbus_transfer(host, dev, reg, (int)val) : -ENODEV; -+} -+EXPORT_SYMBOL(cbus_write_reg); -+ -+static int __init cbus_bus_probe(struct platform_device *pdev) -+{ -+ struct cbus_host *chost; -+ struct cbus_host_platform_data *pdata = pdev->dev.platform_data; -+ int ret; -+ -+ chost = kzalloc(sizeof (*chost), GFP_KERNEL); -+ if (chost == NULL) -+ return -ENOMEM; -+ -+ spin_lock_init(&chost->lock); -+ -+ chost->clk_gpio = pdata->clk_gpio; -+ chost->dat_gpio = pdata->dat_gpio; -+ chost->sel_gpio = pdata->sel_gpio; -+ -+ if ((ret = gpio_request(chost->clk_gpio, "CBUS clk")) < 0) -+ goto exit1; -+ -+ if ((ret = gpio_request(chost->dat_gpio, "CBUS data")) < 0) -+ goto exit2; -+ -+ if ((ret = gpio_request(chost->sel_gpio, "CBUS sel")) < 0) -+ goto exit3; -+ -+ gpio_direction_output(chost->clk_gpio, 0); -+ gpio_direction_input(chost->dat_gpio); -+ gpio_direction_output(chost->sel_gpio, 1); -+ -+ gpio_set_value(chost->clk_gpio, 1); -+ gpio_set_value(chost->clk_gpio, 0); -+ -+ platform_set_drvdata(pdev, chost); -+ -+ cbus_host = chost; -+ -+ return 0; -+exit3: -+ gpio_free(chost->dat_gpio); -+exit2: -+ gpio_free(chost->clk_gpio); -+exit1: -+ kfree(chost); -+ -+ return ret; -+} -+ -+static void __exit cbus_bus_remove(struct platform_device *pdev) -+{ -+ struct cbus_host *chost = platform_get_drvdata(pdev); -+ -+ gpio_free(chost->dat_gpio); -+ gpio_free(chost->clk_gpio); -+ kfree(chost); -+} -+ -+static struct platform_driver cbus_driver = { -+ .remove = __exit_p(cbus_bus_remove), -+ .driver = { -+ .name = "cbus", -+ }, -+}; -+ -+static int __init cbus_bus_init(void) -+{ -+ return platform_driver_probe(&cbus_driver, cbus_bus_probe); -+} -+ -+subsys_initcall(cbus_bus_init); -+ -+static void __exit cbus_bus_exit(void) -+{ -+ platform_driver_unregister(&cbus_driver); -+} -+module_exit(cbus_bus_exit); -+ -+MODULE_DESCRIPTION("CBUS serial protocol"); -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Juha Yrjölä"); -+MODULE_AUTHOR("David Weinehall"); -+MODULE_AUTHOR("Mikko Ylinen"); -+ ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/cbus.h -@@ -0,0 +1,36 @@ -+/* -+ * drivers/cbus/cbus.h -+ * -+ * Copyright (C) 2004, 2005 Nokia Corporation -+ * -+ * Written by Juha Yrjölä <juha.yrjola@nokia.com> and -+ * David Weinehall <david.weinehall@nokia.com> -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#ifndef __DRIVERS_CBUS_CBUS_H -+#define __DRIVERS_CBUS_CBUS_H -+ -+struct cbus_host { -+ int clk_gpio, dat_gpio, sel_gpio; -+ spinlock_t lock; -+}; -+ -+extern struct cbus_host *cbus_host; -+ -+extern int cbus_read_reg(struct cbus_host *host, int dev, int reg); -+extern int cbus_write_reg(struct cbus_host *host, int dev, int reg, u16 val); -+ -+#endif /* __DRIVERS_CBUS_CBUS_H */ ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/Kconfig -@@ -0,0 +1,89 @@ -+# -+# CBUS device configuration -+# -+ -+menu "CBUS support" -+ -+config CBUS -+ depends on ARCH_OMAP -+ bool "CBUS support on OMAP" -+ ---help--- -+ CBUS is a proprietary serial protocol by Nokia. It is mainly -+ used for accessing Energy Management auxiliary chips. -+ -+ If you want CBUS support, you should say Y here. -+ -+config CBUS_TAHVO -+ depends on CBUS -+ bool "Support for Tahvo" -+ ---help--- -+ Tahvo is a mixed signal ASIC with some system features -+ -+ If you want Tahvo support, you should say Y here. -+ -+config CBUS_TAHVO_USER -+ depends on CBUS_TAHVO -+ bool "Support for Tahvo user space functions" -+ ---help--- -+ If you want support for Tahvo's user space read/write etc. functions, -+ you should say Y here. -+ -+config CBUS_TAHVO_USB -+ depends on CBUS_TAHVO && USB -+ tristate "Support for Tahvo USB transceiver" -+ ---help--- -+ If you want Tahvo support for USB transceiver, say Y or M here. -+ -+config CBUS_TAHVO_USB_HOST_BY_DEFAULT -+ depends on CBUS_TAHVO_USB && USB_OTG -+ boolean "Device in USB host mode by default" -+ ---help--- -+ Say Y here, if you want the device to enter USB host mode -+ by default on bootup. -+ -+config CBUS_RETU -+ depends on CBUS -+ bool "Support for Retu" -+ ---help--- -+ Retu is a mixed signal ASIC with some system features -+ -+ If you want Retu support, you should say Y here. -+ -+config CBUS_RETU_USER -+ depends on CBUS_RETU -+ bool "Support for Retu user space functions" -+ ---help--- -+ If you want support for Retu's user space read/write etc. functions, -+ you should say Y here. -+ -+config CBUS_RETU_POWERBUTTON -+ depends on CBUS_RETU -+ bool "Support for Retu power button" -+ ---help--- -+ The power button on Nokia 770 is connected to the Retu ASIC. -+ -+ If you want support for the Retu power button, you should say Y here. -+ -+config CBUS_RETU_RTC -+ depends on CBUS_RETU && SYSFS -+ tristate "Support for Retu pseudo-RTC" -+ ---help--- -+ Say Y here if you want support for the device that alleges to be an -+ RTC in Retu. This will expose a sysfs interface for it. -+ -+config CBUS_RETU_WDT -+ depends on CBUS_RETU && SYSFS && WATCHDOG -+ tristate "Support for Retu watchdog timer" -+ ---help--- -+ Say Y here if you want support for the watchdog in Retu. This will -+ expose a sysfs interface to grok it. -+ -+config CBUS_RETU_HEADSET -+ depends on CBUS_RETU && SYSFS -+ tristate "Support for headset detection with Retu/Vilma" -+ ---help--- -+ Say Y here if you want support detecting a headset that's connected -+ to Retu/Vilma. Detection state and events are exposed through -+ sysfs. -+ -+endmenu ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/Makefile -@@ -0,0 +1,14 @@ -+# -+# Makefile for CBUS. -+# -+ -+obj-$(CONFIG_CBUS) += cbus.o -+obj-$(CONFIG_CBUS_TAHVO) += tahvo.o -+obj-$(CONFIG_CBUS_RETU) += retu.o -+obj-$(CONFIG_CBUS_TAHVO_USB) += tahvo-usb.o -+obj-$(CONFIG_CBUS_RETU_POWERBUTTON) += retu-pwrbutton.o -+obj-$(CONFIG_CBUS_RETU_RTC) += retu-rtc.o -+obj-$(CONFIG_CBUS_RETU_WDT) += retu-wdt.o -+obj-$(CONFIG_CBUS_TAHVO_USER) += tahvo-user.o -+obj-$(CONFIG_CBUS_RETU_USER) += retu-user.o -+obj-$(CONFIG_CBUS_RETU_HEADSET) += retu-headset.o ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/retu.c -@@ -0,0 +1,468 @@ -+/** -+ * drivers/cbus/retu.c -+ * -+ * Support functions for Retu ASIC -+ * -+ * Copyright (C) 2004, 2005 Nokia Corporation -+ * -+ * Written by Juha Yrjölä <juha.yrjola@nokia.com>, -+ * David Weinehall <david.weinehall@nokia.com>, and -+ * Mikko Ylinen <mikko.k.ylinen@nokia.com> -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#include <linux/module.h> -+#include <linux/init.h> -+ -+#include <linux/kernel.h> -+#include <linux/errno.h> -+#include <linux/device.h> -+#include <linux/miscdevice.h> -+#include <linux/poll.h> -+#include <linux/fs.h> -+#include <linux/irq.h> -+#include <linux/interrupt.h> -+#include <linux/platform_device.h> -+#include <linux/gpio.h> -+ -+#include <asm/uaccess.h> -+#include <asm/mach-types.h> -+ -+#include <plat/mux.h> -+#include <plat/board.h> -+ -+#include "cbus.h" -+#include "retu.h" -+ -+#define RETU_ID 0x01 -+#define PFX "retu: " -+ -+static int retu_initialized; -+static int retu_irq_pin; -+static int retu_is_vilma; -+ -+static struct tasklet_struct retu_tasklet; -+spinlock_t retu_lock = SPIN_LOCK_UNLOCKED; -+ -+static struct completion device_release; -+ -+struct retu_irq_handler_desc { -+ int (*func)(unsigned long); -+ unsigned long arg; -+ char name[8]; -+}; -+ -+static struct retu_irq_handler_desc retu_irq_handlers[MAX_RETU_IRQ_HANDLERS]; -+ -+/** -+ * retu_read_reg - Read a value from a register in Retu -+ * @reg: the register to read from -+ * -+ * This function returns the contents of the specified register -+ */ -+int retu_read_reg(int reg) -+{ -+ BUG_ON(!retu_initialized); -+ return cbus_read_reg(cbus_host, RETU_ID, reg); -+} -+ -+/** -+ * retu_write_reg - Write a value to a register in Retu -+ * @reg: the register to write to -+ * @reg: the value to write to the register -+ * -+ * This function writes a value to the specified register -+ */ -+void retu_write_reg(int reg, u16 val) -+{ -+ BUG_ON(!retu_initialized); -+ cbus_write_reg(cbus_host, RETU_ID, reg, val); -+} -+ -+void retu_set_clear_reg_bits(int reg, u16 set, u16 clear) -+{ -+ unsigned long flags; -+ u16 w; -+ -+ spin_lock_irqsave(&retu_lock, flags); -+ w = retu_read_reg(reg); -+ w &= ~clear; -+ w |= set; -+ retu_write_reg(reg, w); -+ spin_unlock_irqrestore(&retu_lock, flags); -+} -+ -+#define ADC_MAX_CHAN_NUMBER 13 -+ -+int retu_read_adc(int channel) -+{ -+ unsigned long flags; -+ int res; -+ -+ if (channel < 0 || channel > ADC_MAX_CHAN_NUMBER) -+ return -EINVAL; -+ -+ spin_lock_irqsave(&retu_lock, flags); -+ -+ if ((channel == 8) && retu_is_vilma) { -+ int scr = retu_read_reg(RETU_REG_ADCSCR); -+ int ch = (retu_read_reg(RETU_REG_ADCR) >> 10) & 0xf; -+ if (((scr & 0xff) != 0) && (ch != 8)) -+ retu_write_reg (RETU_REG_ADCSCR, (scr & ~0xff)); -+ } -+ -+ /* Select the channel and read result */ -+ retu_write_reg(RETU_REG_ADCR, channel << 10); -+ res = retu_read_reg(RETU_REG_ADCR) & 0x3ff; -+ -+ if (retu_is_vilma) -+ retu_write_reg(RETU_REG_ADCR, (1 << 13)); -+ -+ /* Unlock retu */ -+ spin_unlock_irqrestore(&retu_lock, flags); -+ -+ return res; -+} -+ -+ -+static u16 retu_disable_bogus_irqs(u16 mask) -+{ -+ int i; -+ -+ for (i = 0; i < MAX_RETU_IRQ_HANDLERS; i++) { -+ if (mask & (1 << i)) -+ continue; -+ if (retu_irq_handlers[i].func != NULL) -+ continue; -+ /* an IRQ was enabled but we don't have a handler for it */ -+ printk(KERN_INFO PFX "disabling bogus IRQ %d\n", i); -+ mask |= (1 << i); -+ } -+ return mask; -+} -+ -+/* -+ * Disable given RETU interrupt -+ */ -+void retu_disable_irq(int id) -+{ -+ unsigned long flags; -+ u16 mask; -+ -+ spin_lock_irqsave(&retu_lock, flags); -+ mask = retu_read_reg(RETU_REG_IMR); -+ mask |= 1 << id; -+ mask = retu_disable_bogus_irqs(mask); -+ retu_write_reg(RETU_REG_IMR, mask); -+ spin_unlock_irqrestore(&retu_lock, flags); -+} -+ -+/* -+ * Enable given RETU interrupt -+ */ -+void retu_enable_irq(int id) -+{ -+ unsigned long flags; -+ u16 mask; -+ -+ if (id == 3) { -+ printk("Enabling Retu IRQ %d\n", id); -+ dump_stack(); -+ } -+ spin_lock_irqsave(&retu_lock, flags); -+ mask = retu_read_reg(RETU_REG_IMR); -+ mask &= ~(1 << id); -+ mask = retu_disable_bogus_irqs(mask); -+ retu_write_reg(RETU_REG_IMR, mask); -+ spin_unlock_irqrestore(&retu_lock, flags); -+} -+ -+/* -+ * Acknowledge given RETU interrupt -+ */ -+void retu_ack_irq(int id) -+{ -+ retu_write_reg(RETU_REG_IDR, 1 << id); -+} -+ -+/* -+ * RETU interrupt handler. Only schedules the tasklet. -+ */ -+static irqreturn_t retu_irq_handler(int irq, void *dev_id) -+{ -+ tasklet_schedule(&retu_tasklet); -+ return IRQ_HANDLED; -+} -+ -+/* -+ * Tasklet handler -+ */ -+static void retu_tasklet_handler(unsigned long data) -+{ -+ struct retu_irq_handler_desc *hnd; -+ u16 id; -+ u16 im; -+ int i; -+ -+ for (;;) { -+ id = retu_read_reg(RETU_REG_IDR); -+ im = ~retu_read_reg(RETU_REG_IMR); -+ id &= im; -+ -+ if (!id) -+ break; -+ -+ for (i = 0; id != 0; i++, id >>= 1) { -+ if (!(id & 1)) -+ continue; -+ hnd = &retu_irq_handlers[i]; -+ if (hnd->func == NULL) { -+ /* Spurious retu interrupt - disable and ack it */ -+ printk(KERN_INFO "Spurious Retu interrupt " -+ "(id %d)\n", i); -+ retu_disable_irq(i); -+ retu_ack_irq(i); -+ continue; -+ } -+ hnd->func(hnd->arg); -+ /* -+ * Don't acknowledge the interrupt here -+ * It must be done explicitly -+ */ -+ } -+ } -+} -+ -+/* -+ * Register the handler for a given RETU interrupt source. -+ */ -+int retu_request_irq(int id, void *irq_handler, unsigned long arg, char *name) -+{ -+ struct retu_irq_handler_desc *hnd; -+ -+ if (irq_handler == NULL || id >= MAX_RETU_IRQ_HANDLERS || -+ name == NULL) { -+ printk(KERN_ERR PFX "Invalid arguments to %s\n", -+ __FUNCTION__); -+ return -EINVAL; -+ } -+ hnd = &retu_irq_handlers[id]; -+ if (hnd->func != NULL) { -+ printk(KERN_ERR PFX "IRQ %d already reserved\n", id); -+ return -EBUSY; -+ } -+ printk(KERN_INFO PFX "Registering interrupt %d for device %s\n", -+ id, name); -+ hnd->func = irq_handler; -+ hnd->arg = arg; -+ strlcpy(hnd->name, name, sizeof(hnd->name)); -+ -+ retu_ack_irq(id); -+ retu_enable_irq(id); -+ -+ return 0; -+} -+ -+/* -+ * Unregister the handler for a given RETU interrupt source. -+ */ -+void retu_free_irq(int id) -+{ -+ struct retu_irq_handler_desc *hnd; -+ -+ if (id >= MAX_RETU_IRQ_HANDLERS) { -+ printk(KERN_ERR PFX "Invalid argument to %s\n", -+ __FUNCTION__); -+ return; -+ } -+ hnd = &retu_irq_handlers[id]; -+ if (hnd->func == NULL) { -+ printk(KERN_ERR PFX "IRQ %d already freed\n", id); -+ return; -+ } -+ -+ retu_disable_irq(id); -+ hnd->func = NULL; -+} -+ -+/** -+ * retu_power_off - Shut down power to system -+ * -+ * This function puts the system in power off state -+ */ -+static void retu_power_off(void) -+{ -+ /* Ignore power button state */ -+ retu_write_reg(RETU_REG_CC1, retu_read_reg(RETU_REG_CC1) | 2); -+ /* Expire watchdog immediately */ -+ retu_write_reg(RETU_REG_WATCHDOG, 0); -+ /* Wait for poweroff*/ -+ for (;;); -+} -+ -+/** -+ * retu_probe - Probe for Retu ASIC -+ * @dev: the Retu device -+ * -+ * Probe for the Retu ASIC and allocate memory -+ * for its device-struct if found -+ */ -+static int __devinit retu_probe(struct device *dev) -+{ -+ int rev, ret; -+ -+ /* Prepare tasklet */ -+ tasklet_init(&retu_tasklet, retu_tasklet_handler, 0); -+ -+ /* REVISIT: Pass these from board-*.c files in platform_data */ -+ if (machine_is_nokia770()) { -+ retu_irq_pin = 62; -+ } else if (machine_is_nokia_n800() || machine_is_nokia_n810() || -+ machine_is_nokia_n810_wimax()) { -+ retu_irq_pin = 108; -+ } else { -+ printk(KERN_ERR "cbus: Unsupported board for tahvo\n"); -+ return -ENODEV; -+ } -+ -+ if ((ret = gpio_request(retu_irq_pin, "RETU irq")) < 0) { -+ printk(KERN_ERR PFX "Unable to reserve IRQ GPIO\n"); -+ return ret; -+ } -+ -+ /* Set the pin as input */ -+ gpio_direction_input(retu_irq_pin); -+ -+ /* Rising edge triggers the IRQ */ -+ set_irq_type(gpio_to_irq(retu_irq_pin), IRQ_TYPE_EDGE_RISING); -+ -+ retu_initialized = 1; -+ -+ rev = retu_read_reg(RETU_REG_ASICR) & 0xff; -+ if (rev & (1 << 7)) -+ retu_is_vilma = 1; -+ -+ printk(KERN_INFO "%s v%d.%d found\n", retu_is_vilma ? "Vilma" : "Retu", -+ (rev >> 4) & 0x07, rev & 0x0f); -+ -+ /* Mask all RETU interrupts */ -+ retu_write_reg(RETU_REG_IMR, 0xffff); -+ -+ ret = request_irq(gpio_to_irq(retu_irq_pin), retu_irq_handler, 0, -+ "retu", 0); -+ if (ret < 0) { -+ printk(KERN_ERR PFX "Unable to register IRQ handler\n"); -+ gpio_free(retu_irq_pin); -+ return ret; -+ } -+ set_irq_wake(gpio_to_irq(retu_irq_pin), 1); -+ -+ /* Register power off function */ -+ pm_power_off = retu_power_off; -+ -+#ifdef CONFIG_CBUS_RETU_USER -+ /* Initialize user-space interface */ -+ if (retu_user_init() < 0) { -+ printk(KERN_ERR "Unable to initialize driver\n"); -+ free_irq(gpio_to_irq(retu_irq_pin), 0); -+ gpio_free(retu_irq_pin); -+ return ret; -+ } -+#endif -+ -+ return 0; -+} -+ -+static int retu_remove(struct device *dev) -+{ -+#ifdef CONFIG_CBUS_RETU_USER -+ retu_user_cleanup(); -+#endif -+ /* Mask all RETU interrupts */ -+ retu_write_reg(RETU_REG_IMR, 0xffff); -+ free_irq(gpio_to_irq(retu_irq_pin), 0); -+ gpio_free(retu_irq_pin); -+ tasklet_kill(&retu_tasklet); -+ -+ return 0; -+} -+ -+static void retu_device_release(struct device *dev) -+{ -+ complete(&device_release); -+} -+ -+static struct device_driver retu_driver = { -+ .name = "retu", -+ .bus = &platform_bus_type, -+ .probe = retu_probe, -+ .remove = retu_remove, -+}; -+ -+static struct platform_device retu_device = { -+ .name = "retu", -+ .id = -1, -+ .dev = { -+ .release = retu_device_release, -+ } -+}; -+ -+/** -+ * retu_init - initialise Retu driver -+ * -+ * Initialise the Retu driver and return 0 if everything worked ok -+ */ -+static int __init retu_init(void) -+{ -+ int ret = 0; -+ -+ printk(KERN_INFO "Retu/Vilma driver initialising\n"); -+ -+ init_completion(&device_release); -+ -+ if ((ret = driver_register(&retu_driver)) < 0) -+ return ret; -+ -+ if ((ret = platform_device_register(&retu_device)) < 0) { -+ driver_unregister(&retu_driver); -+ return ret; -+ } -+ return 0; -+} -+ -+/* -+ * Cleanup -+ */ -+static void __exit retu_exit(void) -+{ -+ platform_device_unregister(&retu_device); -+ driver_unregister(&retu_driver); -+ wait_for_completion(&device_release); -+} -+ -+EXPORT_SYMBOL(retu_request_irq); -+EXPORT_SYMBOL(retu_free_irq); -+EXPORT_SYMBOL(retu_enable_irq); -+EXPORT_SYMBOL(retu_disable_irq); -+EXPORT_SYMBOL(retu_ack_irq); -+EXPORT_SYMBOL(retu_read_reg); -+EXPORT_SYMBOL(retu_write_reg); -+ -+subsys_initcall(retu_init); -+module_exit(retu_exit); -+ -+MODULE_DESCRIPTION("Retu ASIC control"); -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Juha Yrjölä, David Weinehall, and Mikko Ylinen"); ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/retu.h -@@ -0,0 +1,77 @@ -+/** -+ * drivers/cbus/retu.h -+ * -+ * Copyright (C) 2004, 2005 Nokia Corporation -+ * -+ * Written by Juha Yrjölä <juha.yrjola@nokia.com> and -+ * David Weinehall <david.weinehall@nokia.com> -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#ifndef __DRIVERS_CBUS_RETU_H -+#define __DRIVERS_CBUS_RETU_H -+ -+#include <linux/types.h> -+ -+/* Registers */ -+#define RETU_REG_ASICR 0x00 /* ASIC ID & revision */ -+#define RETU_REG_IDR 0x01 /* Interrupt ID */ -+#define RETU_REG_IMR 0x02 /* Interrupt mask */ -+#define RETU_REG_RTCDSR 0x03 /* RTC seconds register */ -+#define RETU_REG_RTCHMR 0x04 /* RTC hours and minutes register */ -+#define RETU_REG_RTCHMAR 0x05 /* RTC hours and minutes alarm and time set register */ -+#define RETU_REG_RTCCALR 0x06 /* RTC calibration register */ -+#define RETU_REG_ADCR 0x08 /* ADC result */ -+#define RETU_REG_ADCSCR 0x09 /* ADC sample ctrl */ -+#define RETU_REG_CC1 0x0d /* Common control register 1 */ -+#define RETU_REG_CC2 0x0e /* Common control register 2 */ -+#define RETU_REG_CTRL_CLR 0x0f /* Regulator clear register */ -+#define RETU_REG_CTRL_SET 0x10 /* Regulator set register */ -+#define RETU_REG_STATUS 0x16 /* Status register */ -+#define RETU_REG_WATCHDOG 0x17 /* Watchdog register */ -+#define RETU_REG_AUDTXR 0x18 /* Audio Codec Tx register */ -+#define RETU_REG_MAX 0x1f -+ -+/* Interrupt sources */ -+#define RETU_INT_PWR 0 -+#define RETU_INT_CHAR 1 -+#define RETU_INT_RTCS 2 -+#define RETU_INT_RTCM 3 -+#define RETU_INT_RTCD 4 -+#define RETU_INT_RTCA 5 -+#define RETU_INT_HOOK 6 -+#define RETU_INT_HEAD 7 -+#define RETU_INT_ADCS 8 -+ -+#define MAX_RETU_IRQ_HANDLERS 16 -+ -+int retu_read_reg(int reg); -+void retu_write_reg(int reg, u16 val); -+void retu_set_clear_reg_bits(int reg, u16 set, u16 clear); -+int retu_read_adc(int channel); -+int retu_request_irq(int id, void *irq_handler, unsigned long arg, char *name); -+void retu_free_irq(int id); -+void retu_enable_irq(int id); -+void retu_disable_irq(int id); -+void retu_ack_irq(int id); -+ -+#ifdef CONFIG_CBUS_RETU_USER -+int retu_user_init(void); -+void retu_user_cleanup(void); -+#endif -+ -+extern spinlock_t retu_lock; -+ -+#endif /* __DRIVERS_CBUS_RETU_H */ ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/retu-headset.c -@@ -0,0 +1,356 @@ -+/** -+ * Retu/Vilma headset detection -+ * -+ * Copyright (C) 2006 Nokia Corporation -+ * -+ * Written by Juha Yrjölä -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#include <linux/module.h> -+#include <linux/init.h> -+#include <linux/kernel.h> -+#include <linux/delay.h> -+#include <linux/input.h> -+#include <linux/platform_device.h> -+#include <linux/slab.h> -+ -+#include "retu.h" -+ -+#define RETU_ADC_CHANNEL_HOOKDET 0x05 -+ -+#define RETU_HEADSET_KEY KEY_PHONE -+ -+struct retu_headset { -+ spinlock_t lock; -+ struct mutex mutex; -+ struct platform_device *pdev; -+ struct input_dev *idev; -+ unsigned bias_enabled; -+ unsigned detection_enabled; -+ unsigned pressed; -+ struct timer_list enable_timer; -+ struct timer_list detect_timer; -+}; -+ -+static void retu_headset_set_bias(int enable) -+{ -+ if (enable) { -+ retu_set_clear_reg_bits(RETU_REG_AUDTXR, -+ (1 << 0) | (1 << 1), 0); -+ msleep(2); -+ retu_set_clear_reg_bits(RETU_REG_AUDTXR, 1 << 3, 0); -+ } else { -+ retu_set_clear_reg_bits(RETU_REG_AUDTXR, 0, -+ (1 << 0) | (1 << 1) | (1 << 3)); -+ } -+} -+ -+static void retu_headset_enable(struct retu_headset *hs) -+{ -+ mutex_lock(&hs->mutex); -+ if (!hs->bias_enabled) { -+ hs->bias_enabled = 1; -+ retu_headset_set_bias(1); -+ } -+ mutex_unlock(&hs->mutex); -+} -+ -+static void retu_headset_disable(struct retu_headset *hs) -+{ -+ mutex_lock(&hs->mutex); -+ if (hs->bias_enabled) { -+ hs->bias_enabled = 0; -+ retu_headset_set_bias(0); -+ } -+ mutex_unlock(&hs->mutex); -+} -+ -+static void retu_headset_det_enable(struct retu_headset *hs) -+{ -+ mutex_lock(&hs->mutex); -+ if (!hs->detection_enabled) { -+ hs->detection_enabled = 1; -+ retu_set_clear_reg_bits(RETU_REG_CC1, (1 << 10) | (1 << 8), 0); -+ retu_enable_irq(RETU_INT_HOOK); -+ } -+ mutex_unlock(&hs->mutex); -+} -+ -+static void retu_headset_det_disable(struct retu_headset *hs) -+{ -+ unsigned long flags; -+ -+ mutex_lock(&hs->mutex); -+ if (hs->detection_enabled) { -+ hs->detection_enabled = 0; -+ retu_disable_irq(RETU_INT_HOOK); -+ del_timer_sync(&hs->enable_timer); -+ del_timer_sync(&hs->detect_timer); -+ spin_lock_irqsave(&hs->lock, flags); -+ if (hs->pressed) -+ input_report_key(hs->idev, RETU_HEADSET_KEY, 0); -+ spin_unlock_irqrestore(&hs->lock, flags); -+ retu_set_clear_reg_bits(RETU_REG_CC1, 0, (1 << 10) | (1 << 8)); -+ } -+ mutex_unlock(&hs->mutex); -+} -+ -+static ssize_t retu_headset_hookdet_show(struct device *dev, -+ struct device_attribute *attr, -+ char *buf) -+{ -+ int val; -+ -+ val = retu_read_adc(RETU_ADC_CHANNEL_HOOKDET); -+ return sprintf(buf, "%d\n", val); -+} -+ -+static DEVICE_ATTR(hookdet, S_IRUGO, retu_headset_hookdet_show, NULL); -+ -+static ssize_t retu_headset_enable_show(struct device *dev, -+ struct device_attribute *attr, -+ char *buf) -+{ -+ struct retu_headset *hs = dev_get_drvdata(dev); -+ -+ return sprintf(buf, "%u\n", hs->bias_enabled); -+} -+ -+static ssize_t retu_headset_enable_store(struct device *dev, -+ struct device_attribute *attr, -+ const char *buf, size_t count) -+{ -+ struct retu_headset *hs = dev_get_drvdata(dev); -+ int enable; -+ -+ if (sscanf(buf, "%u", &enable) != 1) -+ return -EINVAL; -+ if (enable) -+ retu_headset_enable(hs); -+ else -+ retu_headset_disable(hs); -+ return count; -+} -+ -+static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR | S_IWGRP, -+ retu_headset_enable_show, retu_headset_enable_store); -+ -+static ssize_t retu_headset_enable_det_show(struct device *dev, -+ struct device_attribute *attr, -+ char *buf) -+{ -+ struct retu_headset *hs = dev_get_drvdata(dev); -+ -+ return sprintf(buf, "%u\n", hs->detection_enabled); -+} -+ -+static ssize_t retu_headset_enable_det_store(struct device *dev, -+ struct device_attribute *attr, -+ const char *buf, size_t count) -+{ -+ struct retu_headset *hs = dev_get_drvdata(dev); -+ int enable; -+ -+ if (sscanf(buf, "%u", &enable) != 1) -+ return -EINVAL; -+ if (enable) -+ retu_headset_det_enable(hs); -+ else -+ retu_headset_det_disable(hs); -+ return count; -+} -+ -+static DEVICE_ATTR(enable_det, S_IRUGO | S_IWUSR | S_IWGRP, -+ retu_headset_enable_det_show, -+ retu_headset_enable_det_store); -+ -+static void retu_headset_hook_interrupt(unsigned long arg) -+{ -+ struct retu_headset *hs = (struct retu_headset *) arg; -+ unsigned long flags; -+ -+ retu_ack_irq(RETU_INT_HOOK); -+ spin_lock_irqsave(&hs->lock, flags); -+ if (!hs->pressed) { -+ /* Headset button was just pressed down. */ -+ hs->pressed = 1; -+ input_report_key(hs->idev, RETU_HEADSET_KEY, 1); -+ } -+ spin_unlock_irqrestore(&hs->lock, flags); -+ retu_set_clear_reg_bits(RETU_REG_CC1, 0, (1 << 10) | (1 << 8)); -+ mod_timer(&hs->enable_timer, jiffies + msecs_to_jiffies(50)); -+} -+ -+static void retu_headset_enable_timer(unsigned long arg) -+{ -+ struct retu_headset *hs = (struct retu_headset *) arg; -+ -+ retu_set_clear_reg_bits(RETU_REG_CC1, (1 << 10) | (1 << 8), 0); -+ mod_timer(&hs->detect_timer, jiffies + msecs_to_jiffies(350)); -+} -+ -+static void retu_headset_detect_timer(unsigned long arg) -+{ -+ struct retu_headset *hs = (struct retu_headset *) arg; -+ unsigned long flags; -+ -+ spin_lock_irqsave(&hs->lock, flags); -+ if (hs->pressed) { -+ hs->pressed = 0; -+ input_report_key(hs->idev, RETU_HEADSET_KEY, 0); -+ } -+ spin_unlock_irqrestore(&hs->lock, flags); -+} -+ -+static int __init retu_headset_probe(struct platform_device *pdev) -+{ -+ struct retu_headset *hs; -+ int r; -+ -+ hs = kzalloc(sizeof(*hs), GFP_KERNEL); -+ if (hs == NULL) -+ return -ENOMEM; -+ -+ hs->pdev = pdev; -+ -+ hs->idev = input_allocate_device(); -+ if (hs->idev == NULL) { -+ r = -ENOMEM; -+ goto err1; -+ } -+ hs->idev->name = "retu-headset"; -+ hs->idev->dev.parent = &pdev->dev; -+ set_bit(EV_KEY, hs->idev->evbit); -+ set_bit(RETU_HEADSET_KEY, hs->idev->keybit); -+ r = input_register_device(hs->idev); -+ if (r < 0) -+ goto err2; -+ -+ r = device_create_file(&pdev->dev, &dev_attr_hookdet); -+ if (r < 0) -+ goto err3; -+ r = device_create_file(&pdev->dev, &dev_attr_enable); -+ if (r < 0) -+ goto err4; -+ r = device_create_file(&pdev->dev, &dev_attr_enable_det); -+ if (r < 0) -+ goto err5; -+ platform_set_drvdata(pdev, hs); -+ -+ spin_lock_init(&hs->lock); -+ mutex_init(&hs->mutex); -+ setup_timer(&hs->enable_timer, retu_headset_enable_timer, -+ (unsigned long) hs); -+ setup_timer(&hs->detect_timer, retu_headset_detect_timer, -+ (unsigned long) hs); -+ -+ r = retu_request_irq(RETU_INT_HOOK, retu_headset_hook_interrupt, -+ (unsigned long) hs, "hookdet"); -+ if (r != 0) { -+ dev_err(&pdev->dev, "hookdet IRQ not available\n"); -+ goto err6; -+ } -+ retu_disable_irq(RETU_INT_HOOK); -+ return 0; -+err6: -+ device_remove_file(&pdev->dev, &dev_attr_enable_det); -+err5: -+ device_remove_file(&pdev->dev, &dev_attr_enable); -+err4: -+ device_remove_file(&pdev->dev, &dev_attr_hookdet); -+err3: -+ input_unregister_device(hs->idev); -+err2: -+ input_free_device(hs->idev); -+err1: -+ kfree(hs); -+ return r; -+} -+ -+static int retu_headset_remove(struct platform_device *pdev) -+{ -+ struct retu_headset *hs = platform_get_drvdata(pdev); -+ -+ device_remove_file(&pdev->dev, &dev_attr_hookdet); -+ device_remove_file(&pdev->dev, &dev_attr_enable); -+ device_remove_file(&pdev->dev, &dev_attr_enable_det); -+ retu_headset_disable(hs); -+ retu_headset_det_disable(hs); -+ retu_free_irq(RETU_INT_HOOK); -+ input_unregister_device(hs->idev); -+ input_free_device(hs->idev); -+ return 0; -+} -+ -+static int retu_headset_suspend(struct platform_device *pdev, -+ pm_message_t mesg) -+{ -+ struct retu_headset *hs = platform_get_drvdata(pdev); -+ -+ mutex_lock(&hs->mutex); -+ if (hs->bias_enabled) -+ retu_headset_set_bias(0); -+ mutex_unlock(&hs->mutex); -+ -+ return 0; -+} -+ -+static int retu_headset_resume(struct platform_device *pdev) -+{ -+ struct retu_headset *hs = platform_get_drvdata(pdev); -+ -+ mutex_lock(&hs->mutex); -+ if (hs->bias_enabled) -+ retu_headset_set_bias(1); -+ mutex_unlock(&hs->mutex); -+ -+ return 0; -+} -+ -+static struct platform_driver retu_headset_driver = { -+ .probe = retu_headset_probe, -+ .remove = retu_headset_remove, -+ .suspend = retu_headset_suspend, -+ .resume = retu_headset_resume, -+ .driver = { -+ .name = "retu-headset", -+ }, -+}; -+ -+static int __init retu_headset_init(void) -+{ -+ int r; -+ -+ printk(KERN_INFO "Retu/Vilma headset driver initializing\n"); -+ -+ r = platform_driver_register(&retu_headset_driver); -+ if (r < 0) -+ return r; -+ -+ return 0; -+} -+ -+static void __exit retu_headset_exit(void) -+{ -+ platform_driver_unregister(&retu_headset_driver); -+} -+ -+module_init(retu_headset_init); -+module_exit(retu_headset_exit); -+ -+MODULE_DESCRIPTION("Retu/Vilma headset detection"); -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Juha Yrjölä"); ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/retu-pwrbutton.c -@@ -0,0 +1,118 @@ -+/** -+ * drivers/cbus/retu-pwrbutton.c -+ * -+ * Driver for sending retu power button event to input-layer -+ * -+ * Copyright (C) 2004 Nokia Corporation -+ * -+ * Written by Ari Saastamoinen <ari.saastamoinen@elektrobit.com> -+ * -+ * Contact Juha Yrjölä <juha.yrjola@nokia.com> -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#include <linux/module.h> -+#include <linux/init.h> -+#include <linux/kernel.h> -+#include <linux/errno.h> -+#include <linux/input.h> -+#include <linux/timer.h> -+#include <linux/jiffies.h> -+#include <linux/bitops.h> -+ -+#include "retu.h" -+ -+#define RETU_STATUS_PWRONX (1 << 5) -+ -+#define PWRBTN_DELAY 20 -+#define PWRBTN_UP 0 -+#define PWRBTN_PRESSED 1 -+ -+static int pwrbtn_state; -+static struct input_dev *pwrbtn_dev; -+static struct timer_list pwrbtn_timer; -+ -+static void retubutton_timer_func(unsigned long arg) -+{ -+ int state; -+ -+ if (retu_read_reg(RETU_REG_STATUS) & RETU_STATUS_PWRONX) -+ state = PWRBTN_UP; -+ else -+ state = PWRBTN_PRESSED; -+ -+ if (pwrbtn_state != state) { -+ input_report_key(pwrbtn_dev, KEY_POWER, state); -+ pwrbtn_state = state; -+ } -+} -+ -+/** -+ * Interrupt function is called whenever power button key is pressed -+ * or released. -+ */ -+static void retubutton_irq(unsigned long arg) -+{ -+ retu_ack_irq(RETU_INT_PWR); -+ mod_timer(&pwrbtn_timer, jiffies + msecs_to_jiffies(PWRBTN_DELAY)); -+} -+ -+/** -+ * Init function. -+ * Allocates interrupt for power button and registers itself to input layer. -+ */ -+static int __init retubutton_init(void) -+{ -+ int irq; -+ -+ printk(KERN_INFO "Retu power button driver initialized\n"); -+ irq = RETU_INT_PWR; -+ -+ init_timer(&pwrbtn_timer); -+ pwrbtn_timer.function = retubutton_timer_func; -+ -+ if (retu_request_irq(irq, &retubutton_irq, 0, "PwrOnX") < 0) { -+ printk(KERN_ERR "%s@%s: Cannot allocate irq\n", -+ __FUNCTION__, __FILE__); -+ return -EBUSY; -+ } -+ -+ pwrbtn_dev = input_allocate_device(); -+ if (!pwrbtn_dev) -+ return -ENOMEM; -+ -+ pwrbtn_dev->evbit[0] = BIT_MASK(EV_KEY); -+ pwrbtn_dev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER); -+ pwrbtn_dev->name = "retu-pwrbutton"; -+ -+ return input_register_device(pwrbtn_dev); -+} -+ -+/** -+ * Cleanup function which is called when driver is unloaded -+ */ -+static void __exit retubutton_exit(void) -+{ -+ retu_free_irq(RETU_INT_PWR); -+ del_timer_sync(&pwrbtn_timer); -+ input_unregister_device(pwrbtn_dev); -+} -+ -+module_init(retubutton_init); -+module_exit(retubutton_exit); -+ -+MODULE_DESCRIPTION("Retu Power Button"); -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Ari Saastamoinen"); ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/retu-rtc.c -@@ -0,0 +1,477 @@ -+/** -+ * drivers/cbus/retu-rtc.c -+ * -+ * Support for Retu RTC -+ * -+ * Copyright (C) 2004, 2005 Nokia Corporation -+ * -+ * Written by Paul Mundt <paul.mundt@nokia.com> and -+ * Igor Stoppa <igor.stoppa@nokia.com> -+ * -+ * The Retu RTC is essentially a partial read-only RTC that gives us Retu's -+ * idea of what time actually is. It's left as a userspace excercise to map -+ * this back to time in the real world and ensure that calibration settings -+ * are sane to compensate for any horrible drift (on account of not being able -+ * to set the clock to anything). -+ * -+ * Days are semi-writeable. Namely, Retu will only track 255 days for us -+ * consecutively, after which the counter is explicitly stuck at 255 until -+ * someone comes along and clears it with a write. In the event that no one -+ * comes along and clears it, we no longer have any idea what day it is. -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#include <linux/device.h> -+#include <linux/init.h> -+#include <linux/kernel.h> -+#include <linux/module.h> -+#include <linux/completion.h> -+#include <linux/platform_device.h> -+#include <linux/mutex.h> -+#include <linux/workqueue.h> -+ -+#include "cbus.h" -+#include "retu.h" -+ -+static struct mutex retu_rtc_mutex; -+static u16 retu_rtc_alarm_expired; -+static u16 retu_rtc_reset_occurred; -+ -+static DECLARE_COMPLETION(retu_rtc_exited); -+static DECLARE_COMPLETION(retu_rtc_sync); -+ -+static void retu_rtc_barrier(void); -+ -+static void retu_rtc_device_release(struct device *dev) -+{ -+ complete(&retu_rtc_exited); -+} -+ -+static ssize_t retu_rtc_time_show(struct device *dev, struct device_attribute *attr, -+ char *buf) -+{ -+ u16 dsr, hmr, dsr2; -+ -+ mutex_lock(&retu_rtc_mutex); -+ -+ do { -+ u16 dummy; -+ -+ /* -+ * Not being in_interrupt() for a retu rtc IRQ, we need to -+ * read twice for consistency.. -+ */ -+ dummy = retu_read_reg(RETU_REG_RTCDSR); -+ dsr = retu_read_reg(RETU_REG_RTCDSR); -+ -+ dummy = retu_read_reg(RETU_REG_RTCHMR); -+ hmr = retu_read_reg(RETU_REG_RTCHMR); -+ -+ dummy = retu_read_reg(RETU_REG_RTCDSR); -+ dsr2 = retu_read_reg(RETU_REG_RTCDSR); -+ } while ((dsr != dsr2)); -+ -+ mutex_unlock(&retu_rtc_mutex); -+ -+ /* -+ * Format a 32-bit date-string for userspace -+ * -+ * days | hours | minutes | seconds -+ * -+ * 8 bits for each. -+ * -+ * This mostly sucks because days and seconds are tracked in RTCDSR -+ * while hours and minutes are tracked in RTCHMR. And yes, there -+ * really are no words that can describe an 8 bit day register (or -+ * rather, none that will be reprinted here). -+ */ -+ return sprintf(buf, "0x%08x\n", (((dsr >> 8) & 0xff) << 24) | -+ (((hmr >> 8) & 0x1f) << 16) | -+ ((hmr & 0x3f) << 8) | (dsr & 0x3f)); -+} -+ -+static ssize_t retu_rtc_time_store(struct device *dev, struct device_attribute *attr, -+ const char *buf, size_t count) -+{ -+ mutex_lock(&retu_rtc_mutex); -+ /* -+ * Writing anything to the day counter forces it to 0 -+ * The seconds counter would be cleared by resetting the minutes counter, -+ * however this won't happen, since we are using the hh:mm counters as -+ * a set of free running counters and the day counter as a multiple -+ * overflow holder. -+ */ -+ -+ /* Reset day counter, but keep Temperature Shutdown state */ -+ retu_write_reg(RETU_REG_RTCDSR, -+ retu_read_reg(RETU_REG_RTCDSR) & (1 << 6)); -+ -+ mutex_unlock(&retu_rtc_mutex); -+ -+ return count; -+} -+ -+static DEVICE_ATTR(time, S_IRUGO | S_IWUSR, retu_rtc_time_show, -+ retu_rtc_time_store); -+ -+ -+static ssize_t retu_rtc_reset_show(struct device *dev, struct device_attribute *attr, char *buf) -+{ -+ /* -+ * Returns the status of the rtc -+ * -+ * 0: no reset has occurred or the status has been cleared -+ * 1: a reset has occurred -+ * -+ * RTC needs to be reset only when both main battery -+ * _AND_ backup battery are discharged -+ */ -+ return sprintf(buf, "%u\n", retu_rtc_reset_occurred); -+} -+ -+static void retu_rtc_do_reset(void) -+{ -+ u16 ccr1; -+ -+ ccr1 = retu_read_reg(RETU_REG_CC1); -+ /* RTC in reset */ -+ retu_write_reg(RETU_REG_CC1, ccr1 | 0x0001); -+ /* RTC in normal operating mode */ -+ retu_write_reg(RETU_REG_CC1, ccr1 & ~0x0001); -+ -+ retu_rtc_barrier(); -+ /* Disable alarm and RTC WD */ -+ retu_write_reg(RETU_REG_RTCHMAR, 0x7f3f); -+ /* Set Calibration register to default value */ -+ retu_write_reg(RETU_REG_RTCCALR, 0x00c0); -+ -+ retu_rtc_alarm_expired = 0; -+ retu_rtc_reset_occurred = 1; -+} -+ -+static ssize_t retu_rtc_reset_store(struct device *dev, struct device_attribute *attr, -+ const char *buf, size_t count) -+{ -+ unsigned choice; -+ -+ if(sscanf(buf, "%u", &choice) != 1) -+ return count; -+ mutex_lock(&retu_rtc_mutex); -+ if (choice == 0) -+ retu_rtc_reset_occurred = 0; -+ else if (choice == 1) -+ retu_rtc_do_reset(); -+ mutex_unlock(&retu_rtc_mutex); -+ return count; -+} -+ -+static DEVICE_ATTR(reset, S_IRUGO | S_IWUSR, retu_rtc_reset_show, -+ retu_rtc_reset_store); -+ -+static ssize_t retu_rtc_alarm_show(struct device *dev, struct device_attribute *attr, -+ char *buf) -+{ -+ u16 chmar; -+ ssize_t retval; -+ -+ mutex_lock(&retu_rtc_mutex); -+ /* -+ * Format a 16-bit date-string for userspace -+ * -+ * hours | minutes -+ * 8 bits for each. -+ */ -+ chmar = retu_read_reg(RETU_REG_RTCHMAR); -+ /* No shifting needed, only masking unrelated bits */ -+ retval = sprintf(buf, "0x%04x\n", chmar & 0x1f3f); -+ mutex_unlock(&retu_rtc_mutex); -+ -+ return retval; -+} -+ -+static ssize_t retu_rtc_alarm_store(struct device *dev, struct device_attribute *attr, -+ const char *buf, size_t count) -+{ -+ u16 chmar; -+ unsigned alrm; -+ unsigned hours; -+ unsigned minutes; -+ -+ mutex_lock(&retu_rtc_mutex); -+ -+ if(sscanf(buf, "%x", &alrm) != 1) -+ return count; -+ hours = (alrm >> 8) & 0x001f; -+ minutes = (alrm >> 0) & 0x003f; -+ if ((hours < 24 && minutes < 60) || (hours == 24 && minutes == 60)) { -+ /* -+ * OK, the time format for the alarm is valid (including the -+ * disabling values) -+ */ -+ /* Keeps the RTC watchdog status */ -+ chmar = retu_read_reg(RETU_REG_RTCHMAR) & 0x6000; -+ chmar |= alrm & 0x1f3f; /* Stores the requested alarm */ -+ retu_rtc_barrier(); -+ retu_write_reg(RETU_REG_RTCHMAR, chmar); -+ /* If the alarm is being disabled */ -+ if (hours == 24 && minutes == 60) { -+ /* disable the interrupt */ -+ retu_disable_irq(RETU_INT_RTCA); -+ retu_rtc_alarm_expired = 0; -+ } else -+ /* enable the interrupt */ -+ retu_enable_irq(RETU_INT_RTCA); -+ } -+ mutex_unlock(&retu_rtc_mutex); -+ -+ return count; -+} -+ -+static DEVICE_ATTR(alarm, S_IRUGO | S_IWUSR, retu_rtc_alarm_show, -+ retu_rtc_alarm_store); -+ -+static ssize_t retu_rtc_alarm_expired_show(struct device *dev, struct device_attribute *attr, -+ char *buf) -+{ -+ ssize_t retval; -+ -+ retval = sprintf(buf, "%u\n", retu_rtc_alarm_expired); -+ -+ return retval; -+} -+ -+static ssize_t retu_rtc_alarm_expired_store(struct device *dev, struct device_attribute *attr, -+ const char *buf, size_t count) -+{ -+ retu_rtc_alarm_expired = 0; -+ -+ return count; -+} -+ -+static DEVICE_ATTR(alarm_expired, S_IRUGO | S_IWUSR, retu_rtc_alarm_expired_show, -+ retu_rtc_alarm_expired_store); -+ -+ -+static ssize_t retu_rtc_cal_show(struct device *dev, struct device_attribute *attr, -+ char *buf) -+{ -+ u16 rtccalr1; -+ -+ mutex_lock(&retu_rtc_mutex); -+ rtccalr1 = retu_read_reg(RETU_REG_RTCCALR); -+ mutex_unlock(&retu_rtc_mutex); -+ -+ /* -+ * Shows the status of the Calibration Register. -+ * -+ * Default, after power loss: 0x0000 -+ * Default, for R&D: 0x00C0 -+ * Default, for factory: 0x00?? -+ * -+ */ -+ return sprintf(buf, "0x%04x\n", rtccalr1 & 0x00ff); -+} -+ -+static ssize_t retu_rtc_cal_store(struct device *dev, struct device_attribute *attr, -+ const char *buf, size_t count) -+{ -+ unsigned calibration_value; -+ -+ if (sscanf(buf, "%x", &calibration_value) != 1) -+ return count; -+ -+ mutex_lock(&retu_rtc_mutex); -+ retu_rtc_barrier(); -+ retu_write_reg(RETU_REG_RTCCALR, calibration_value & 0x00ff); -+ mutex_unlock(&retu_rtc_mutex); -+ -+ return count; -+} -+ -+static DEVICE_ATTR(cal, S_IRUGO | S_IWUSR, retu_rtc_cal_show, -+ retu_rtc_cal_store); -+ -+static struct platform_device retu_rtc_device; -+ -+static void retu_rtca_disable(void) -+{ -+ retu_disable_irq(RETU_INT_RTCA); -+ retu_rtc_alarm_expired = 1; -+ retu_rtc_barrier(); -+ retu_write_reg(RETU_REG_RTCHMAR, (24 << 8) | 60); -+} -+ -+static void retu_rtca_expired(struct work_struct *unused) -+{ -+ retu_rtca_disable(); -+ sysfs_notify(&retu_rtc_device.dev.kobj, NULL, "alarm_expired"); -+} -+ -+DECLARE_WORK(retu_rtca_work, retu_rtca_expired); -+ -+/* -+ * RTCHMR RTCHMAR RTCCAL must be accessed within 0.9 s since the seconds -+ * interrupt has been signaled in the IDR register -+ */ -+static void retu_rtcs_interrupt(unsigned long unused) -+{ -+ retu_ack_irq(RETU_INT_RTCS); -+ complete_all(&retu_rtc_sync); -+} -+ -+static void retu_rtca_interrupt(unsigned long unused) -+{ -+ retu_ack_irq(RETU_INT_RTCA); -+ schedule_work(&retu_rtca_work); -+} -+ -+static int retu_rtc_init_irq(void) -+{ -+ int ret; -+ -+ ret = retu_request_irq(RETU_INT_RTCS, retu_rtcs_interrupt, 0, "RTCS"); -+ if (ret != 0) -+ return ret; -+ /* -+ * We will take care of enabling and disabling the interrupt -+ * elsewhere, so leave it off by default.. -+ */ -+ retu_disable_irq(RETU_INT_RTCS); -+ -+ ret = retu_request_irq(RETU_INT_RTCA, retu_rtca_interrupt, 0, "RTCA"); -+ if (ret != 0) { -+ retu_free_irq(RETU_INT_RTCS); -+ return ret; -+ } -+ retu_disable_irq(RETU_INT_RTCA); -+ -+ return 0; -+} -+ -+ -+static int __devinit retu_rtc_probe(struct device *dev) -+{ -+ int r; -+ -+ retu_rtc_alarm_expired = retu_read_reg(RETU_REG_IDR) & -+ (0x1 << RETU_INT_RTCA); -+ -+ if ((r = retu_rtc_init_irq()) != 0) -+ return r; -+ -+ mutex_init(&retu_rtc_mutex); -+ -+ /* If the calibration register is zero, we've probably lost -+ * power */ -+ if (retu_read_reg(RETU_REG_RTCCALR) & 0x00ff) -+ retu_rtc_reset_occurred = 0; -+ else -+ retu_rtc_do_reset(); -+ -+ if ((r = device_create_file(dev, &dev_attr_time)) != 0) -+ return r; -+ else if ((r = device_create_file(dev, &dev_attr_reset)) != 0) -+ goto err_unregister_time; -+ else if ((r = device_create_file(dev, &dev_attr_alarm)) != 0) -+ goto err_unregister_reset; -+ else if ((r = device_create_file(dev, &dev_attr_alarm_expired)) != 0) -+ goto err_unregister_alarm; -+ else if ((r = device_create_file(dev, &dev_attr_cal)) != 0) -+ goto err_unregister_alarm_expired; -+ else -+ return r; -+ -+err_unregister_alarm_expired: -+ device_remove_file(dev, &dev_attr_alarm_expired); -+err_unregister_alarm: -+ device_remove_file(dev, &dev_attr_alarm); -+err_unregister_reset: -+ device_remove_file(dev, &dev_attr_reset); -+err_unregister_time: -+ device_remove_file(dev, &dev_attr_time); -+ return r; -+} -+ -+static int __devexit retu_rtc_remove(struct device *dev) -+{ -+ retu_disable_irq(RETU_INT_RTCS); -+ retu_free_irq(RETU_INT_RTCS); -+ retu_free_irq(RETU_INT_RTCA); -+ device_remove_file(dev, &dev_attr_cal); -+ device_remove_file(dev, &dev_attr_alarm_expired); -+ device_remove_file(dev, &dev_attr_alarm); -+ device_remove_file(dev, &dev_attr_reset); -+ device_remove_file(dev, &dev_attr_time); -+ return 0; -+} -+ -+static struct device_driver retu_rtc_driver = { -+ .name = "retu-rtc", -+ .bus = &platform_bus_type, -+ .probe = retu_rtc_probe, -+ .remove = __devexit_p(retu_rtc_remove), -+}; -+ -+static struct platform_device retu_rtc_device = { -+ .name = "retu-rtc", -+ .id = -1, -+ .dev = { -+ .release = retu_rtc_device_release, -+ }, -+}; -+ -+/* This function provides syncronization with the RTCS interrupt handler */ -+static void retu_rtc_barrier(void) -+{ -+ INIT_COMPLETION(retu_rtc_sync); -+ retu_ack_irq(RETU_INT_RTCS); -+ retu_enable_irq(RETU_INT_RTCS); -+ wait_for_completion(&retu_rtc_sync); -+ retu_disable_irq(RETU_INT_RTCS); -+} -+ -+static int __init retu_rtc_init(void) -+{ -+ int ret; -+ -+ init_completion(&retu_rtc_exited); -+ -+ if ((ret = driver_register(&retu_rtc_driver)) != 0) -+ return ret; -+ -+ if ((ret = platform_device_register(&retu_rtc_device)) != 0) -+ goto err_unregister_driver; -+ -+ return 0; -+ -+err_unregister_driver: -+ driver_unregister(&retu_rtc_driver); -+ return ret; -+} -+ -+static void __exit retu_rtc_exit(void) -+{ -+ platform_device_unregister(&retu_rtc_device); -+ driver_unregister(&retu_rtc_driver); -+ -+ wait_for_completion(&retu_rtc_exited); -+} -+ -+module_init(retu_rtc_init); -+module_exit(retu_rtc_exit); -+ -+MODULE_DESCRIPTION("Retu RTC"); -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Paul Mundt and Igor Stoppa"); ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/retu-user.c -@@ -0,0 +1,425 @@ -+/** -+ * drivers/cbus/retu-user.c -+ * -+ * Retu user space interface functions -+ * -+ * Copyright (C) 2004, 2005 Nokia Corporation -+ * -+ * Written by Mikko Ylinen <mikko.k.ylinen@nokia.com> -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#include <linux/types.h> -+#include <linux/kernel.h> -+#include <linux/interrupt.h> -+#include <linux/module.h> -+#include <linux/init.h> -+#include <linux/fs.h> -+#include <linux/miscdevice.h> -+#include <linux/poll.h> -+#include <linux/list.h> -+#include <linux/spinlock.h> -+#include <linux/sched.h> -+#include <linux/mutex.h> -+#include <linux/slab.h> -+ -+#include <asm/uaccess.h> -+ -+#include "retu.h" -+ -+#include "user_retu_tahvo.h" -+ -+/* Maximum size of IRQ node buffer/pool */ -+#define RETU_MAX_IRQ_BUF_LEN 16 -+ -+#define PFX "retu-user: " -+ -+/* Bitmap for marking the interrupt sources as having the handlers */ -+static u32 retu_irq_bits; -+ -+/* For allowing only one user process to subscribe to the retu interrupts */ -+static struct file *retu_irq_subscr = NULL; -+ -+/* For poll and IRQ passing */ -+struct retu_irq { -+ u32 id; -+ struct list_head node; -+}; -+ -+static spinlock_t retu_irqs_lock; -+static struct retu_irq *retu_irq_block; -+static LIST_HEAD(retu_irqs); -+static LIST_HEAD(retu_irqs_reserve); -+ -+/* Wait queue - used when user wants to read the device */ -+DECLARE_WAIT_QUEUE_HEAD(retu_user_waitqueue); -+ -+/* Semaphore to protect irq subscription sequence */ -+static struct mutex retu_mutex; -+ -+/* This array specifies RETU register types (read/write/toggle) */ -+static const u8 retu_access_bits[] = { -+ 1, -+ 4, -+ 3, -+ 3, -+ 1, -+ 3, -+ 3, -+ 0, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3, -+ 4, -+ 4, -+ 3, -+ 0, -+ 0, -+ 0, -+ 0, -+ 1, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3 -+}; -+ -+/* -+ * The handler for all RETU interrupts. -+ * -+ * arg is the interrupt source in RETU. -+ */ -+static void retu_user_irq_handler(unsigned long arg) -+{ -+ struct retu_irq *irq; -+ -+ retu_ack_irq(arg); -+ -+ spin_lock(&retu_irqs_lock); -+ if (list_empty(&retu_irqs_reserve)) { -+ spin_unlock(&retu_irqs_lock); -+ return; -+ } -+ irq = list_entry((&retu_irqs_reserve)->next, struct retu_irq, node); -+ irq->id = arg; -+ list_move_tail(&irq->node, &retu_irqs); -+ spin_unlock(&retu_irqs_lock); -+ -+ /* wake up waiting thread */ -+ wake_up(&retu_user_waitqueue); -+} -+ -+/* -+ * This routine sets up the interrupt handler and marks an interrupt source -+ * in RETU as a candidate for signal delivery to the user process. -+ */ -+static int retu_user_subscribe_to_irq(int id, struct file *filp) -+{ -+ int ret; -+ -+ mutex_lock(&retu_mutex); -+ if ((retu_irq_subscr != NULL) && (retu_irq_subscr != filp)) { -+ mutex_unlock(&retu_mutex); -+ return -EBUSY; -+ } -+ /* Store the file pointer of the first user process registering IRQs */ -+ retu_irq_subscr = filp; -+ mutex_unlock(&retu_mutex); -+ -+ if (retu_irq_bits & (1 << id)) -+ return 0; -+ -+ ret = retu_request_irq(id, retu_user_irq_handler, id, ""); -+ if (ret < 0) -+ return ret; -+ -+ /* Mark that this interrupt has a handler */ -+ retu_irq_bits |= 1 << id; -+ -+ return 0; -+} -+ -+/* -+ * Unregisters all RETU interrupt handlers. -+ */ -+static void retu_unreg_irq_handlers(void) -+{ -+ int id; -+ -+ if (!retu_irq_bits) -+ return; -+ -+ for (id = 0; id < MAX_RETU_IRQ_HANDLERS; id++) -+ if (retu_irq_bits & (1 << id)) -+ retu_free_irq(id); -+ -+ retu_irq_bits = 0; -+} -+ -+/* -+ * Write to RETU register. -+ * Returns 0 upon success, a negative error value otherwise. -+ */ -+static int retu_user_write_with_mask(u32 field, u16 value) -+{ -+ u32 mask; -+ u32 reg; -+ u_short tmp; -+ unsigned long flags; -+ -+ mask = MASK(field); -+ reg = REG(field); -+ -+ /* Detect bad mask and reg */ -+ if (mask == 0 || reg > RETU_REG_MAX || -+ retu_access_bits[reg] == READ_ONLY) { -+ printk(KERN_ERR PFX "invalid arguments (reg=%#x, mask=%#x)\n", -+ reg, mask); -+ return -EINVAL; -+ } -+ -+ /* Justify value according to mask */ -+ while (!(mask & 1)) { -+ value = value << 1; -+ mask = mask >> 1; -+ } -+ -+ spin_lock_irqsave(&retu_lock, flags); -+ if (retu_access_bits[reg] == TOGGLE) { -+ /* No need to detect previous content of register */ -+ tmp = 0; -+ } else { -+ /* Read current value of register */ -+ tmp = retu_read_reg(reg); -+ } -+ -+ /* Generate new value */ -+ tmp = (tmp & ~MASK(field)) | (value & MASK(field)); -+ /* Write data to RETU */ -+ retu_write_reg(reg, tmp); -+ spin_unlock_irqrestore(&retu_lock, flags); -+ -+ return 0; -+} -+ -+/* -+ * Read RETU register. -+ */ -+static u32 retu_user_read_with_mask(u32 field) -+{ -+ u_short value; -+ u32 mask, reg; -+ -+ mask = MASK(field); -+ reg = REG(field); -+ -+ /* Detect bad mask and reg */ -+ if (mask == 0 || reg > RETU_REG_MAX) { -+ printk(KERN_ERR PFX "invalid arguments (reg=%#x, mask=%#x)\n", -+ reg, mask); -+ return -EINVAL; -+ } -+ -+ /* Read the register */ -+ value = retu_read_reg(reg) & mask; -+ -+ /* Right justify value */ -+ while (!(mask & 1)) { -+ value = value >> 1; -+ mask = mask >> 1; -+ } -+ -+ return value; -+} -+ -+/* -+ * Close device -+ */ -+static int retu_close(struct inode *inode, struct file *filp) -+{ -+ /* Unregister all interrupts that have been registered */ -+ if (retu_irq_subscr == filp) { -+ retu_unreg_irq_handlers(); -+ retu_irq_subscr = NULL; -+ } -+ -+ return 0; -+} -+ -+/* -+ * Device control (ioctl) -+ */ -+static int retu_ioctl(struct inode *inode, struct file *filp, -+ unsigned int cmd, unsigned long arg) -+{ -+ struct retu_tahvo_write_parms par; -+ int ret; -+ -+ switch (cmd) { -+ case URT_IOCT_IRQ_SUBSCR: -+ return retu_user_subscribe_to_irq(arg, filp); -+ case RETU_IOCH_READ: -+ return retu_user_read_with_mask(arg); -+ case RETU_IOCX_WRITE: -+ ret = copy_from_user(&par, (void __user *) arg, sizeof(par)); -+ if (ret) -+ printk(KERN_ERR "copy_from_user failed: %d\n", ret); -+ par.result = retu_user_write_with_mask(par.field, par.value); -+ ret = copy_to_user((void __user *) arg, &par, sizeof(par)); -+ if (ret) -+ printk(KERN_ERR "copy_to_user failed: %d\n", ret); -+ break; -+ case RETU_IOCH_ADC_READ: -+ return retu_read_adc(arg); -+ default: -+ return -ENOIOCTLCMD; -+ } -+ return 0; -+} -+ -+/* -+ * Read from device -+ */ -+static ssize_t retu_read(struct file *filp, char *buf, size_t count, -+ loff_t * offp) -+{ -+ struct retu_irq *irq; -+ -+ u32 nr, i; -+ -+ /* read not permitted if neither filp nor anyone has registered IRQs */ -+ if (retu_irq_subscr != filp) -+ return -EPERM; -+ -+ if ((count < sizeof(u32)) || ((count % sizeof(u32)) != 0)) -+ return -EINVAL; -+ -+ nr = count / sizeof(u32); -+ -+ for (i = 0; i < nr; i++) { -+ unsigned long flags; -+ u32 irq_id; -+ int ret; -+ -+ ret = wait_event_interruptible(retu_user_waitqueue, -+ !list_empty(&retu_irqs)); -+ if (ret < 0) -+ return ret; -+ -+ spin_lock_irqsave(&retu_irqs_lock, flags); -+ irq = list_entry((&retu_irqs)->next, struct retu_irq, node); -+ irq_id = irq->id; -+ list_move(&irq->node, &retu_irqs_reserve); -+ spin_unlock_irqrestore(&retu_irqs_lock, flags); -+ -+ ret = copy_to_user(buf + i * sizeof(irq_id), &irq_id, -+ sizeof(irq_id)); -+ if (ret) -+ printk(KERN_ERR "copy_to_user failed: %d\n", ret); -+ } -+ -+ return count; -+} -+ -+/* -+ * Poll method -+ */ -+static unsigned retu_poll(struct file *filp, struct poll_table_struct *pt) -+{ -+ if (!list_empty(&retu_irqs)) -+ return POLLIN; -+ -+ poll_wait(filp, &retu_user_waitqueue, pt); -+ -+ if (!list_empty(&retu_irqs)) -+ return POLLIN; -+ else -+ return 0; -+} -+ -+static struct file_operations retu_user_fileops = { -+ .owner = THIS_MODULE, -+ .ioctl = retu_ioctl, -+ .read = retu_read, -+ .release = retu_close, -+ .poll = retu_poll -+}; -+ -+static struct miscdevice retu_device = { -+ .minor = MISC_DYNAMIC_MINOR, -+ .name = "retu", -+ .fops = &retu_user_fileops -+}; -+ -+/* -+ * Initialization -+ * -+ * @return 0 if successful, error value otherwise. -+ */ -+int retu_user_init(void) -+{ -+ struct retu_irq *irq; -+ int res, i; -+ -+ irq = kmalloc(sizeof(*irq) * RETU_MAX_IRQ_BUF_LEN, GFP_KERNEL); -+ if (irq == NULL) { -+ printk(KERN_ERR PFX "kmalloc failed\n"); -+ return -ENOMEM; -+ } -+ memset(irq, 0, sizeof(*irq) * RETU_MAX_IRQ_BUF_LEN); -+ for (i = 0; i < RETU_MAX_IRQ_BUF_LEN; i++) -+ list_add(&irq[i].node, &retu_irqs_reserve); -+ -+ retu_irq_block = irq; -+ -+ spin_lock_init(&retu_irqs_lock); -+ mutex_init(&retu_mutex); -+ -+ /* Request a misc device */ -+ res = misc_register(&retu_device); -+ if (res < 0) { -+ printk(KERN_ERR PFX "unable to register misc device for %s\n", -+ retu_device.name); -+ kfree(irq); -+ return res; -+ } -+ -+ return 0; -+} -+ -+/* -+ * Cleanup. -+ */ -+void retu_user_cleanup(void) -+{ -+ /* Unregister our misc device */ -+ misc_deregister(&retu_device); -+ /* Unregister and disable all RETU interrupts used by this module */ -+ retu_unreg_irq_handlers(); -+ kfree(retu_irq_block); -+} -+ -+MODULE_DESCRIPTION("Retu ASIC user space functions"); -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Mikko Ylinen"); ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/retu-wdt.c -@@ -0,0 +1,388 @@ -+/** -+ * drivers/cbus/retu-wdt.c -+ * -+ * Driver for Retu watchdog -+ * -+ * Copyright (C) 2004, 2005 Nokia Corporation -+ * -+ * Written by Amit Kucheria <amit.kucheria@nokia.com> -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#include <linux/kernel.h> -+#include <linux/module.h> -+#include <linux/device.h> -+#include <linux/init.h> -+#include <linux/fs.h> -+#include <linux/io.h> -+#include <linux/platform_device.h> -+#include <linux/slab.h> -+ -+#include <linux/completion.h> -+#include <linux/errno.h> -+#include <linux/moduleparam.h> -+#include <linux/platform_device.h> -+#include <linux/miscdevice.h> -+#include <linux/watchdog.h> -+ -+#include <asm/uaccess.h> -+ -+#include <plat/prcm.h> -+ -+#include "cbus.h" -+#include "retu.h" -+ -+/* Watchdog timeout in seconds */ -+#define RETU_WDT_MIN_TIMER 0 -+#define RETU_WDT_DEFAULT_TIMER 32 -+#define RETU_WDT_MAX_TIMER 63 -+ -+static struct completion retu_wdt_completion; -+static DEFINE_MUTEX(retu_wdt_mutex); -+ -+/* Current period of watchdog */ -+static unsigned int period_val = RETU_WDT_DEFAULT_TIMER; -+static int counter_param = RETU_WDT_MAX_TIMER; -+ -+struct retu_wdt_dev { -+ struct device *dev; -+ int users; -+ struct miscdevice retu_wdt_miscdev; -+ struct timer_list ping_timer; -+}; -+ -+static struct retu_wdt_dev *retu_wdt; -+ -+static void retu_wdt_set_ping_timer(unsigned long enable); -+ -+static int _retu_modify_counter(unsigned int new) -+{ -+ retu_write_reg(RETU_REG_WATCHDOG, (u16)new); -+ -+ return 0; -+} -+ -+static int retu_modify_counter(unsigned int new) -+{ -+ if (new < RETU_WDT_MIN_TIMER || new > RETU_WDT_MAX_TIMER) -+ return -EINVAL; -+ -+ mutex_lock(&retu_wdt_mutex); -+ period_val = new; -+ _retu_modify_counter(period_val); -+ mutex_unlock(&retu_wdt_mutex); -+ -+ return 0; -+} -+ -+static ssize_t retu_wdt_period_show(struct device *dev, -+ struct device_attribute *attr, char *buf) -+{ -+ /* Show current max counter */ -+ return sprintf(buf, "%u\n", (u16)period_val); -+} -+ -+/* -+ * Note: This inteface is non-standard and likely to disappear! -+ * Use /dev/watchdog instead, that's the standard. -+ */ -+static ssize_t retu_wdt_period_store(struct device *dev, -+ struct device_attribute *attr, -+ const char *buf, size_t count) -+{ -+ unsigned int new_period; -+ int ret; -+ -+#ifdef CONFIG_WATCHDOG_NOWAYOUT -+ retu_wdt_set_ping_timer(0); -+#endif -+ -+ if (sscanf(buf, "%u", &new_period) != 1) { -+ printk(KERN_ALERT "retu_wdt_period_store: Invalid input\n"); -+ return -EINVAL; -+ } -+ -+ ret = retu_modify_counter(new_period); -+ if (ret < 0) -+ return ret; -+ -+ return strnlen(buf, count); -+} -+ -+static ssize_t retu_wdt_counter_show(struct device *dev, -+ struct device_attribute *attr, char *buf) -+{ -+ u16 counter; -+ -+ /* Show current value in watchdog counter */ -+ counter = retu_read_reg(RETU_REG_WATCHDOG); -+ -+ /* Only the 5 LSB are important */ -+ return snprintf(buf, PAGE_SIZE, "%u\n", (counter & 0x3F)); -+} -+ -+static DEVICE_ATTR(period, S_IRUGO | S_IWUSR, retu_wdt_period_show, \ -+ retu_wdt_period_store); -+static DEVICE_ATTR(counter, S_IRUGO, retu_wdt_counter_show, NULL); -+ -+/*----------------------------------------------------------------------------*/ -+ -+/* -+ * Since retu watchdog cannot be disabled in hardware, we must kick it -+ * with a timer until userspace watchdog software takes over. Do this -+ * unless /dev/watchdog is open or CONFIG_WATCHDOG_NOWAYOUT is set. -+ */ -+static void retu_wdt_set_ping_timer(unsigned long enable) -+{ -+ _retu_modify_counter(RETU_WDT_MAX_TIMER); -+ if (enable) -+ mod_timer(&retu_wdt->ping_timer, -+ jiffies + RETU_WDT_DEFAULT_TIMER * HZ); -+ else -+ del_timer_sync(&retu_wdt->ping_timer); -+} -+ -+static int retu_wdt_open(struct inode *inode, struct file *file) -+{ -+ if (test_and_set_bit(1, (unsigned long *)&(retu_wdt->users))) -+ return -EBUSY; -+ -+ file->private_data = (void *)retu_wdt; -+ retu_wdt_set_ping_timer(0); -+ -+ return nonseekable_open(inode, file); -+} -+ -+static int retu_wdt_release(struct inode *inode, struct file *file) -+{ -+ struct retu_wdt_dev *wdev = file->private_data; -+ -+#ifndef CONFIG_WATCHDOG_NOWAYOUT -+ retu_wdt_set_ping_timer(1); -+#endif -+ wdev->users = 0; -+ -+ return 0; -+} -+ -+static ssize_t retu_wdt_write(struct file *file, const char __user *data, -+ size_t len, loff_t *ppos) -+{ -+ if (len) -+ retu_modify_counter(RETU_WDT_MAX_TIMER); -+ -+ return len; -+} -+ -+static int retu_wdt_ioctl(struct inode *inode, struct file *file, -+ unsigned int cmd, unsigned long arg) -+{ -+ int new_margin; -+ -+ static struct watchdog_info ident = { -+ .identity = "Retu Watchdog", -+ .options = WDIOF_SETTIMEOUT, -+ .firmware_version = 0, -+ }; -+ -+ switch (cmd) { -+ default: -+ return -ENOTTY; -+ case WDIOC_GETSUPPORT: -+ return copy_to_user((struct watchdog_info __user *)arg, &ident, -+ sizeof(ident)); -+ case WDIOC_GETSTATUS: -+ return put_user(0, (int __user *)arg); -+ case WDIOC_GETBOOTSTATUS: -+ if (cpu_is_omap16xx()) -+ return put_user(omap_readw(ARM_SYSST), -+ (int __user *)arg); -+ if (cpu_is_omap24xx()) -+ return put_user(omap_prcm_get_reset_sources(), -+ (int __user *)arg); -+ case WDIOC_KEEPALIVE: -+ retu_modify_counter(RETU_WDT_MAX_TIMER); -+ break; -+ case WDIOC_SETTIMEOUT: -+ if (get_user(new_margin, (int __user *)arg)) -+ return -EFAULT; -+ retu_modify_counter(new_margin); -+ /* Fall through */ -+ case WDIOC_GETTIMEOUT: -+ return put_user(period_val, (int __user *)arg); -+ } -+ -+ return 0; -+} -+ -+/* Start kicking retu watchdog until user space starts doing the kicking */ -+static int __init retu_wdt_ping(void) -+{ -+ -+#ifdef CONFIG_WATCHDOG_NOWAYOUT -+ retu_modify_counter(RETU_WDT_MAX_TIMER); -+#else -+ retu_wdt_set_ping_timer(1); -+#endif -+ -+ return 0; -+} -+late_initcall(retu_wdt_ping); -+ -+static const struct file_operations retu_wdt_fops = { -+ .owner = THIS_MODULE, -+ .write = retu_wdt_write, -+ .ioctl = retu_wdt_ioctl, -+ .open = retu_wdt_open, -+ .release = retu_wdt_release, -+}; -+ -+/*----------------------------------------------------------------------------*/ -+ -+static int __devinit retu_wdt_probe(struct device *dev) -+{ -+ struct retu_wdt_dev *wdev; -+ int ret; -+ -+ wdev = kzalloc(sizeof(struct retu_wdt_dev), GFP_KERNEL); -+ if (!wdev) -+ return -ENOMEM; -+ -+ wdev->users = 0; -+ -+ ret = device_create_file(dev, &dev_attr_period); -+ if (ret) { -+ printk(KERN_ERR "retu_wdt_probe: Error creating " -+ "sys device file: period\n"); -+ goto free1; -+ } -+ -+ ret = device_create_file(dev, &dev_attr_counter); -+ if (ret) { -+ printk(KERN_ERR "retu_wdt_probe: Error creating " -+ "sys device file: counter\n"); -+ goto free2; -+ } -+ -+ dev_set_drvdata(dev, wdev); -+ retu_wdt = wdev; -+ wdev->retu_wdt_miscdev.parent = dev; -+ wdev->retu_wdt_miscdev.minor = WATCHDOG_MINOR; -+ wdev->retu_wdt_miscdev.name = "watchdog"; -+ wdev->retu_wdt_miscdev.fops = &retu_wdt_fops; -+ -+ ret = misc_register(&(wdev->retu_wdt_miscdev)); -+ if (ret) -+ goto free3; -+ -+ setup_timer(&wdev->ping_timer, retu_wdt_set_ping_timer, 1); -+ -+ /* Kick the watchdog for kernel booting to finish */ -+ retu_modify_counter(RETU_WDT_MAX_TIMER); -+ -+ return 0; -+ -+free3: -+ device_remove_file(dev, &dev_attr_counter); -+ -+free2: -+ device_remove_file(dev, &dev_attr_period); -+free1: -+ kfree(wdev); -+ -+ return ret; -+} -+ -+static int __devexit retu_wdt_remove(struct device *dev) -+{ -+ struct retu_wdt_dev *wdev; -+ -+ wdev = dev_get_drvdata(dev); -+ misc_deregister(&(wdev->retu_wdt_miscdev)); -+ device_remove_file(dev, &dev_attr_period); -+ device_remove_file(dev, &dev_attr_counter); -+ kfree(wdev); -+ -+ return 0; -+} -+ -+static void retu_wdt_device_release(struct device *dev) -+{ -+ complete(&retu_wdt_completion); -+} -+ -+static struct platform_device retu_wdt_device = { -+ .name = "retu-watchdog", -+ .id = -1, -+ .dev = { -+ .release = retu_wdt_device_release, -+ }, -+}; -+ -+static struct device_driver retu_wdt_driver = { -+ .name = "retu-watchdog", -+ .bus = &platform_bus_type, -+ .probe = retu_wdt_probe, -+ .remove = __devexit_p(retu_wdt_remove), -+}; -+ -+static int __init retu_wdt_init(void) -+{ -+ int ret; -+ -+ init_completion(&retu_wdt_completion); -+ -+ ret = driver_register(&retu_wdt_driver); -+ if (ret) -+ return ret; -+ -+ ret = platform_device_register(&retu_wdt_device); -+ if (ret) -+ goto exit1; -+ -+ /* passed as module parameter? */ -+ ret = retu_modify_counter(counter_param); -+ if (ret == -EINVAL) { -+ ret = retu_modify_counter(RETU_WDT_DEFAULT_TIMER); -+ printk(KERN_INFO -+ "retu_wdt_init: Intializing to default value\n"); -+ } -+ -+ printk(KERN_INFO "Retu watchdog driver initialized\n"); -+ return ret; -+ -+exit1: -+ driver_unregister(&retu_wdt_driver); -+ wait_for_completion(&retu_wdt_completion); -+ -+ return ret; -+} -+ -+static void __exit retu_wdt_exit(void) -+{ -+ platform_device_unregister(&retu_wdt_device); -+ driver_unregister(&retu_wdt_driver); -+ -+ wait_for_completion(&retu_wdt_completion); -+} -+ -+module_init(retu_wdt_init); -+module_exit(retu_wdt_exit); -+module_param(counter_param, int, 0); -+ -+MODULE_DESCRIPTION("Retu WatchDog"); -+MODULE_AUTHOR("Amit Kucheria"); -+MODULE_LICENSE("GPL"); -+ ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/tahvo.c -@@ -0,0 +1,443 @@ -+/** -+ * drivers/cbus/tahvo.c -+ * -+ * Support functions for Tahvo ASIC -+ * -+ * Copyright (C) 2004, 2005 Nokia Corporation -+ * -+ * Written by Juha Yrjölä <juha.yrjola@nokia.com>, -+ * David Weinehall <david.weinehall@nokia.com>, and -+ * Mikko Ylinen <mikko.k.ylinen@nokia.com> -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#include <linux/module.h> -+#include <linux/init.h> -+ -+#include <linux/kernel.h> -+#include <linux/errno.h> -+#include <linux/device.h> -+#include <linux/miscdevice.h> -+#include <linux/poll.h> -+#include <linux/fs.h> -+#include <linux/irq.h> -+#include <linux/interrupt.h> -+#include <linux/platform_device.h> -+#include <linux/gpio.h> -+ -+#include <asm/uaccess.h> -+#include <asm/mach-types.h> -+ -+#include <plat/mux.h> -+#include <plat/board.h> -+ -+#include "cbus.h" -+#include "tahvo.h" -+ -+#define TAHVO_ID 0x02 -+#define PFX "tahvo: " -+ -+static int tahvo_initialized; -+static int tahvo_irq_pin; -+static int tahvo_is_betty; -+ -+static struct tasklet_struct tahvo_tasklet; -+spinlock_t tahvo_lock = SPIN_LOCK_UNLOCKED; -+ -+static struct completion device_release; -+ -+struct tahvo_irq_handler_desc { -+ int (*func)(unsigned long); -+ unsigned long arg; -+ char name[8]; -+}; -+ -+static struct tahvo_irq_handler_desc tahvo_irq_handlers[MAX_TAHVO_IRQ_HANDLERS]; -+ -+/** -+ * tahvo_read_reg - Read a value from a register in Tahvo -+ * @reg: the register to read from -+ * -+ * This function returns the contents of the specified register -+ */ -+int tahvo_read_reg(int reg) -+{ -+ BUG_ON(!tahvo_initialized); -+ return cbus_read_reg(cbus_host, TAHVO_ID, reg); -+} -+ -+/** -+ * tahvo_write_reg - Write a value to a register in Tahvo -+ * @reg: the register to write to -+ * @reg: the value to write to the register -+ * -+ * This function writes a value to the specified register -+ */ -+void tahvo_write_reg(int reg, u16 val) -+{ -+ BUG_ON(!tahvo_initialized); -+ cbus_write_reg(cbus_host, TAHVO_ID, reg, val); -+} -+ -+/** -+ * tahvo_set_clear_reg_bits - set and clear register bits atomically -+ * @reg: the register to write to -+ * @bits: the bits to set -+ * -+ * This function sets and clears the specified Tahvo register bits atomically -+ */ -+void tahvo_set_clear_reg_bits(int reg, u16 set, u16 clear) -+{ -+ unsigned long flags; -+ u16 w; -+ -+ spin_lock_irqsave(&tahvo_lock, flags); -+ w = tahvo_read_reg(reg); -+ w &= ~clear; -+ w |= set; -+ tahvo_write_reg(reg, w); -+ spin_unlock_irqrestore(&tahvo_lock, flags); -+} -+ -+/* -+ * Disable given TAHVO interrupt -+ */ -+void tahvo_disable_irq(int id) -+{ -+ unsigned long flags; -+ u16 mask; -+ -+ spin_lock_irqsave(&tahvo_lock, flags); -+ mask = tahvo_read_reg(TAHVO_REG_IMR); -+ mask |= 1 << id; -+ tahvo_write_reg(TAHVO_REG_IMR, mask); -+ spin_unlock_irqrestore(&tahvo_lock, flags); -+} -+ -+/* -+ * Enable given TAHVO interrupt -+ */ -+void tahvo_enable_irq(int id) -+{ -+ unsigned long flags; -+ u16 mask; -+ -+ spin_lock_irqsave(&tahvo_lock, flags); -+ mask = tahvo_read_reg(TAHVO_REG_IMR); -+ mask &= ~(1 << id); -+ tahvo_write_reg(TAHVO_REG_IMR, mask); -+ spin_unlock_irqrestore(&tahvo_lock, flags); -+} -+ -+/* -+ * Acknowledge given TAHVO interrupt -+ */ -+void tahvo_ack_irq(int id) -+{ -+ tahvo_write_reg(TAHVO_REG_IDR, 1 << id); -+} -+ -+static int tahvo_7bit_backlight; -+ -+int tahvo_get_backlight_level(void) -+{ -+ int mask; -+ -+ if (tahvo_7bit_backlight) -+ mask = 0x7f; -+ else -+ mask = 0x0f; -+ return tahvo_read_reg(TAHVO_REG_LEDPWMR) & mask; -+} -+ -+int tahvo_get_max_backlight_level(void) -+{ -+ if (tahvo_7bit_backlight) -+ return 0x7f; -+ else -+ return 0x0f; -+} -+ -+void tahvo_set_backlight_level(int level) -+{ -+ int max_level; -+ -+ max_level = tahvo_get_max_backlight_level(); -+ if (level > max_level) -+ level = max_level; -+ tahvo_write_reg(TAHVO_REG_LEDPWMR, level); -+} -+ -+/* -+ * TAHVO interrupt handler. Only schedules the tasklet. -+ */ -+static irqreturn_t tahvo_irq_handler(int irq, void *dev_id) -+{ -+ tasklet_schedule(&tahvo_tasklet); -+ return IRQ_HANDLED; -+} -+ -+/* -+ * Tasklet handler -+ */ -+static void tahvo_tasklet_handler(unsigned long data) -+{ -+ struct tahvo_irq_handler_desc *hnd; -+ u16 id; -+ u16 im; -+ int i; -+ -+ for (;;) { -+ id = tahvo_read_reg(TAHVO_REG_IDR); -+ im = ~tahvo_read_reg(TAHVO_REG_IMR); -+ id &= im; -+ -+ if (!id) -+ break; -+ -+ for (i = 0; id != 0; i++, id >>= 1) { -+ if (!(id & 1)) -+ continue; -+ hnd = &tahvo_irq_handlers[i]; -+ if (hnd->func == NULL) { -+ /* Spurious tahvo interrupt - just ack it */ -+ printk(KERN_INFO "Spurious Tahvo interrupt " -+ "(id %d)\n", i); -+ tahvo_disable_irq(i); -+ tahvo_ack_irq(i); -+ continue; -+ } -+ hnd->func(hnd->arg); -+ /* -+ * Don't acknowledge the interrupt here -+ * It must be done explicitly -+ */ -+ } -+ } -+} -+ -+/* -+ * Register the handler for a given TAHVO interrupt source. -+ */ -+int tahvo_request_irq(int id, void *irq_handler, unsigned long arg, char *name) -+{ -+ struct tahvo_irq_handler_desc *hnd; -+ -+ if (irq_handler == NULL || id >= MAX_TAHVO_IRQ_HANDLERS || -+ name == NULL) { -+ printk(KERN_ERR PFX "Invalid arguments to %s\n", -+ __FUNCTION__); -+ return -EINVAL; -+ } -+ hnd = &tahvo_irq_handlers[id]; -+ if (hnd->func != NULL) { -+ printk(KERN_ERR PFX "IRQ %d already reserved\n", id); -+ return -EBUSY; -+ } -+ printk(KERN_INFO PFX "Registering interrupt %d for device %s\n", -+ id, name); -+ hnd->func = irq_handler; -+ hnd->arg = arg; -+ strlcpy(hnd->name, name, sizeof(hnd->name)); -+ -+ tahvo_ack_irq(id); -+ tahvo_enable_irq(id); -+ -+ return 0; -+} -+ -+/* -+ * Unregister the handler for a given TAHVO interrupt source. -+ */ -+void tahvo_free_irq(int id) -+{ -+ struct tahvo_irq_handler_desc *hnd; -+ -+ if (id >= MAX_TAHVO_IRQ_HANDLERS) { -+ printk(KERN_ERR PFX "Invalid argument to %s\n", -+ __FUNCTION__); -+ return; -+ } -+ hnd = &tahvo_irq_handlers[id]; -+ if (hnd->func == NULL) { -+ printk(KERN_ERR PFX "IRQ %d already freed\n", id); -+ return; -+ } -+ -+ tahvo_disable_irq(id); -+ hnd->func = NULL; -+} -+ -+/** -+ * tahvo_probe - Probe for Tahvo ASIC -+ * @dev: the Tahvo device -+ * -+ * Probe for the Tahvo ASIC and allocate memory -+ * for its device-struct if found -+ */ -+static int __devinit tahvo_probe(struct device *dev) -+{ -+ int rev, id, ret; -+ -+ /* Prepare tasklet */ -+ tasklet_init(&tahvo_tasklet, tahvo_tasklet_handler, 0); -+ -+ tahvo_initialized = 1; -+ -+ rev = tahvo_read_reg(TAHVO_REG_ASICR); -+ -+ id = (rev >> 8) & 0xff; -+ if (id == 0x03) { -+ if ((rev & 0xff) >= 0x50) -+ tahvo_7bit_backlight = 1; -+ } else if (id == 0x0b) { -+ tahvo_is_betty = 1; -+ tahvo_7bit_backlight = 1; -+ } else { -+ printk(KERN_ERR "Tahvo/Betty chip not found"); -+ return -ENODEV; -+ } -+ -+ printk(KERN_INFO "%s v%d.%d found\n", tahvo_is_betty ? "Betty" : "Tahvo", -+ (rev >> 4) & 0x0f, rev & 0x0f); -+ -+ /* REVISIT: Pass these from board-*.c files in platform_data */ -+ if (machine_is_nokia770()) { -+ tahvo_irq_pin = 40; -+ } else if (machine_is_nokia_n800() || machine_is_nokia_n810() || -+ machine_is_nokia_n810_wimax()) { -+ tahvo_irq_pin = 111; -+ } else { -+ printk(KERN_ERR "cbus: Unsupported board for tahvo\n"); -+ return -ENODEV; -+ } -+ -+ if ((ret = gpio_request(tahvo_irq_pin, "TAHVO irq")) < 0) { -+ printk(KERN_ERR PFX "Unable to reserve IRQ GPIO\n"); -+ return ret; -+ } -+ -+ /* Set the pin as input */ -+ gpio_direction_input(tahvo_irq_pin); -+ -+ /* Rising edge triggers the IRQ */ -+ set_irq_type(gpio_to_irq(tahvo_irq_pin), IRQ_TYPE_EDGE_RISING); -+ -+ /* Mask all TAHVO interrupts */ -+ tahvo_write_reg(TAHVO_REG_IMR, 0xffff); -+ -+ ret = request_irq(gpio_to_irq(tahvo_irq_pin), tahvo_irq_handler, 0, -+ "tahvo", 0); -+ if (ret < 0) { -+ printk(KERN_ERR PFX "Unable to register IRQ handler\n"); -+ gpio_free(tahvo_irq_pin); -+ return ret; -+ } -+#ifdef CONFIG_CBUS_TAHVO_USER -+ /* Initialize user-space interface */ -+ if (tahvo_user_init() < 0) { -+ printk(KERN_ERR "Unable to initialize driver\n"); -+ free_irq(gpio_to_irq(tahvo_irq_pin), 0); -+ gpio_free(tahvo_irq_pin); -+ return ret; -+ } -+#endif -+ return 0; -+} -+ -+static int tahvo_remove(struct device *dev) -+{ -+#ifdef CONFIG_CBUS_TAHVO_USER -+ tahvo_user_cleanup(); -+#endif -+ /* Mask all TAHVO interrupts */ -+ tahvo_write_reg(TAHVO_REG_IMR, 0xffff); -+ free_irq(gpio_to_irq(tahvo_irq_pin), 0); -+ gpio_free(tahvo_irq_pin); -+ tasklet_kill(&tahvo_tasklet); -+ -+ return 0; -+} -+ -+static void tahvo_device_release(struct device *dev) -+{ -+ complete(&device_release); -+} -+ -+static struct device_driver tahvo_driver = { -+ .name = "tahvo", -+ .bus = &platform_bus_type, -+ .probe = tahvo_probe, -+ .remove = tahvo_remove, -+}; -+ -+static struct platform_device tahvo_device = { -+ .name = "tahvo", -+ .id = -1, -+ .dev = { -+ .release = tahvo_device_release, -+ } -+}; -+ -+/** -+ * tahvo_init - initialise Tahvo driver -+ * -+ * Initialise the Tahvo driver and return 0 if everything worked ok -+ */ -+static int __init tahvo_init(void) -+{ -+ int ret = 0; -+ -+ printk(KERN_INFO "Tahvo/Betty driver initialising\n"); -+ -+ init_completion(&device_release); -+ -+ if ((ret = driver_register(&tahvo_driver)) < 0) -+ return ret; -+ -+ if ((ret = platform_device_register(&tahvo_device)) < 0) { -+ driver_unregister(&tahvo_driver); -+ return ret; -+ } -+ return 0; -+} -+ -+/* -+ * Cleanup -+ */ -+static void __exit tahvo_exit(void) -+{ -+ platform_device_unregister(&tahvo_device); -+ driver_unregister(&tahvo_driver); -+ wait_for_completion(&device_release); -+} -+ -+EXPORT_SYMBOL(tahvo_request_irq); -+EXPORT_SYMBOL(tahvo_free_irq); -+EXPORT_SYMBOL(tahvo_enable_irq); -+EXPORT_SYMBOL(tahvo_disable_irq); -+EXPORT_SYMBOL(tahvo_ack_irq); -+EXPORT_SYMBOL(tahvo_read_reg); -+EXPORT_SYMBOL(tahvo_write_reg); -+EXPORT_SYMBOL(tahvo_get_backlight_level); -+EXPORT_SYMBOL(tahvo_get_max_backlight_level); -+EXPORT_SYMBOL(tahvo_set_backlight_level); -+ -+subsys_initcall(tahvo_init); -+module_exit(tahvo_exit); -+ -+MODULE_DESCRIPTION("Tahvo ASIC control"); -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Juha Yrjölä, David Weinehall, and Mikko Ylinen"); ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/tahvo.h -@@ -0,0 +1,61 @@ -+/* -+ * drivers/cbus/tahvo.h -+ * -+ * Copyright (C) 2004, 2005 Nokia Corporation -+ * -+ * Written by Juha Yrjölä <juha.yrjola@nokia.com> and -+ * David Weinehall <david.weinehall@nokia.com> -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#ifndef __DRIVERS_CBUS_TAHVO_H -+#define __DRIVERS_CBUS_TAHVO_H -+ -+#include <linux/types.h> -+ -+/* Registers */ -+#define TAHVO_REG_ASICR 0x00 /* ASIC ID & revision */ -+#define TAHVO_REG_IDR 0x01 /* Interrupt ID */ -+#define TAHVO_REG_IDSR 0x02 /* Interrupt status */ -+#define TAHVO_REG_IMR 0x03 /* Interrupt mask */ -+#define TAHVO_REG_LEDPWMR 0x05 /* LED PWM */ -+#define TAHVO_REG_USBR 0x06 /* USB control */ -+#define TAHVO_REG_MAX 0x0d -+ -+/* Interrupt sources */ -+#define TAHVO_INT_VBUSON 0 -+ -+#define MAX_TAHVO_IRQ_HANDLERS 8 -+ -+int tahvo_read_reg(int reg); -+void tahvo_write_reg(int reg, u16 val); -+void tahvo_set_clear_reg_bits(int reg, u16 set, u16 clear); -+int tahvo_request_irq(int id, void *irq_handler, unsigned long arg, char *name); -+void tahvo_free_irq(int id); -+void tahvo_enable_irq(int id); -+void tahvo_disable_irq(int id); -+void tahvo_ack_irq(int id); -+int tahvo_get_backlight_level(void); -+int tahvo_get_max_backlight_level(void); -+void tahvo_set_backlight_level(int level); -+ -+#ifdef CONFIG_CBUS_TAHVO_USER -+int tahvo_user_init(void); -+void tahvo_user_cleanup(void); -+#endif -+ -+extern spinlock_t tahvo_lock; -+ -+#endif /* __DRIVERS_CBUS_TAHVO_H */ ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/tahvo-usb.c -@@ -0,0 +1,788 @@ -+/** -+ * drivers/cbus/tahvo-usb.c -+ * -+ * Tahvo USB transeiver -+ * -+ * Copyright (C) 2005-2006 Nokia Corporation -+ * -+ * Parts copied from drivers/i2c/chips/isp1301_omap.c -+ * Copyright (C) 2004 Texas Instruments -+ * Copyright (C) 2004 David Brownell -+ * -+ * Written by Juha Yrjölä <juha.yrjola@nokia.com>, -+ * Tony Lindgren <tony@atomide.com>, and -+ * Timo Teräs <timo.teras@nokia.com> -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#include <linux/kernel.h> -+#include <linux/module.h> -+#include <linux/init.h> -+#include <linux/slab.h> -+#include <linux/io.h> -+#include <linux/interrupt.h> -+#include <linux/platform_device.h> -+#include <linux/usb/ch9.h> -+#include <linux/usb/gadget.h> -+#include <linux/usb.h> -+#include <linux/usb/otg.h> -+#include <linux/i2c.h> -+#include <linux/workqueue.h> -+#include <linux/kobject.h> -+#include <linux/clk.h> -+#include <linux/mutex.h> -+ -+#include <asm/irq.h> -+#include <plat/usb.h> -+ -+#include "cbus.h" -+#include "tahvo.h" -+ -+#define DRIVER_NAME "tahvo-usb" -+ -+#define USBR_SLAVE_CONTROL (1 << 8) -+#define USBR_VPPVIO_SW (1 << 7) -+#define USBR_SPEED (1 << 6) -+#define USBR_REGOUT (1 << 5) -+#define USBR_MASTER_SW2 (1 << 4) -+#define USBR_MASTER_SW1 (1 << 3) -+#define USBR_SLAVE_SW (1 << 2) -+#define USBR_NSUSPEND (1 << 1) -+#define USBR_SEMODE (1 << 0) -+ -+/* bits in OTG_CTRL */ -+ -+/* Bits that are controlled by OMAP OTG and are read-only */ -+#define OTG_CTRL_OMAP_MASK (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|\ -+ OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID) -+/* Bits that are controlled by transceiver */ -+#define OTG_CTRL_XCVR_MASK (OTG_ASESSVLD|OTG_BSESSEND|\ -+ OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID) -+/* Bits that are controlled by system */ -+#define OTG_CTRL_SYS_MASK (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|\ -+ OTG_B_HNPEN|OTG_BUSDROP) -+ -+#if defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OTG) -+#error tahvo-otg.c does not work with OCHI yet! -+#endif -+ -+#define TAHVO_MODE_HOST 0 -+#define TAHVO_MODE_PERIPHERAL 1 -+ -+#ifdef CONFIG_USB_OTG -+#define TAHVO_MODE(tu) (tu)->tahvo_mode -+#elif defined(CONFIG_USB_GADGET_OMAP) -+#define TAHVO_MODE(tu) TAHVO_MODE_PERIPHERAL -+#else -+#define TAHVO_MODE(tu) TAHVO_MODE_HOST -+#endif -+ -+struct tahvo_usb { -+ struct platform_device *pt_dev; -+ struct otg_transceiver otg; -+ int vbus_state; -+ struct work_struct irq_work; -+ struct mutex serialize; -+#ifdef CONFIG_USB_OTG -+ int tahvo_mode; -+#endif -+}; -+static struct platform_device tahvo_usb_device; -+ -+/* -+ * --------------------------------------------------------------------------- -+ * OTG related functions -+ * -+ * These shoud be separated into omap-otg.c driver module, as they are used -+ * by various transceivers. These functions are needed in the UDC-only case -+ * as well. These functions are copied from GPL isp1301_omap.c -+ * --------------------------------------------------------------------------- -+ */ -+static struct platform_device *tahvo_otg_dev; -+ -+static irqreturn_t omap_otg_irq(int irq, void *arg) -+{ -+ struct platform_device *otg_dev = arg; -+ struct tahvo_usb *tu = platform_get_drvdata(otg_dev); -+ u16 otg_irq; -+ -+ otg_irq = omap_readw(OTG_IRQ_SRC); -+ if (otg_irq & OPRT_CHG) { -+ omap_writew(OPRT_CHG, OTG_IRQ_SRC); -+ } else if (otg_irq & B_SRP_TMROUT) { -+ omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC); -+ } else if (otg_irq & B_HNP_FAIL) { -+ omap_writew(B_HNP_FAIL, OTG_IRQ_SRC); -+ } else if (otg_irq & A_SRP_DETECT) { -+ omap_writew(A_SRP_DETECT, OTG_IRQ_SRC); -+ } else if (otg_irq & A_REQ_TMROUT) { -+ omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC); -+ } else if (otg_irq & A_VBUS_ERR) { -+ omap_writew(A_VBUS_ERR, OTG_IRQ_SRC); -+ } else if (otg_irq & DRIVER_SWITCH) { -+ if ((!(omap_readl(OTG_CTRL) & OTG_DRIVER_SEL)) && -+ tu->otg.host && tu->otg.state == OTG_STATE_A_HOST) { -+ /* role is host */ -+ usb_bus_start_enum(tu->otg.host, -+ tu->otg.host->otg_port); -+ } -+ omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC); -+ } else -+ return IRQ_NONE; -+ -+ return IRQ_HANDLED; -+ -+} -+ -+static int omap_otg_init(void) -+{ -+ u32 l; -+ -+#ifdef CONFIG_USB_OTG -+ if (!tahvo_otg_dev) { -+ printk("tahvo-usb: no tahvo_otg_dev\n"); -+ return -ENODEV; -+ } -+#endif -+ -+ l = omap_readl(OTG_SYSCON_1); -+ l &= ~OTG_IDLE_EN; -+ omap_writel(l, OTG_SYSCON_1); -+ udelay(100); -+ -+ /* some of these values are board-specific... */ -+ l = omap_readl(OTG_SYSCON_2); -+ l |= OTG_EN -+ /* for B-device: */ -+ | SRP_GPDATA /* 9msec Bdev D+ pulse */ -+ | SRP_GPDVBUS /* discharge after VBUS pulse */ -+ // | (3 << 24) /* 2msec VBUS pulse */ -+ /* for A-device: */ -+ | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ -+ | SRP_DPW /* detect 167+ns SRP pulses */ -+ | SRP_DATA | SRP_VBUS; /* accept both kinds of SRP pulse */ -+ omap_writel(l, OTG_SYSCON_2); -+ -+ omap_writew(DRIVER_SWITCH | OPRT_CHG -+ | B_SRP_TMROUT | B_HNP_FAIL -+ | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, -+ OTG_IRQ_EN); -+ l = omap_readl(OTG_SYSCON_2); -+ l |= OTG_EN; -+ omap_writel(l, OTG_SYSCON_2); -+ -+ return 0; -+} -+ -+static int omap_otg_probe(struct platform_device *pdev) -+{ -+ int ret, err; -+ -+ tahvo_otg_dev = pdev; -+ ret = omap_otg_init(); -+ if (ret != 0) { -+ printk(KERN_ERR "tahvo-usb: omap_otg_init failed\n"); -+ return ret; -+ } -+ -+ err = request_irq(tahvo_otg_dev->resource[1].start, -+ omap_otg_irq, IRQF_DISABLED, DRIVER_NAME, -+ &tahvo_usb_device); -+ -+ return err; -+} -+ -+static int omap_otg_remove(struct platform_device *pdev) -+{ -+ free_irq(tahvo_otg_dev->resource[1].start, &tahvo_usb_device); -+ tahvo_otg_dev = NULL; -+ -+ return 0; -+} -+ -+static struct platform_driver omap_otg_driver = { -+ .probe = omap_otg_probe, -+ .remove = omap_otg_remove, -+ .driver = { -+ .name = "omap_otg", -+ } -+}; -+ -+/* -+ * --------------------------------------------------------------------------- -+ * Tahvo related functions -+ * These are Nokia proprietary code, except for the OTG register settings, -+ * which are copied from isp1301.c -+ * --------------------------------------------------------------------------- -+ */ -+static ssize_t vbus_state_show(struct device *device, -+ struct device_attribute *attr, char *buf) -+{ -+ struct platform_device *pdev = to_platform_device(device); -+ struct tahvo_usb *tu = platform_get_drvdata(pdev); -+ return sprintf(buf, "%d\n", tu->vbus_state); -+} -+static DEVICE_ATTR(vbus_state, 0444, vbus_state_show, NULL); -+ -+int vbus_active = 0; -+ -+#if 0 -+ -+static int host_suspend(struct tahvo_usb *tu) -+{ -+ struct device *dev; -+ -+ if (!tu->otg.host) -+ return -ENODEV; -+ -+ /* Currently ASSUMES only the OTG port matters; -+ * other ports could be active... -+ */ -+ dev = tu->otg.host->controller; -+ return dev->driver->suspend(dev, PMSG_SUSPEND); -+} -+ -+static int host_resume(struct tahvo_usb *tu) -+{ -+ struct device *dev; -+ -+ if (!tu->otg.host) -+ return -ENODEV; -+ -+ dev = tu->otg.host->controller; -+ return dev->driver->resume(dev); -+} -+ -+#else -+ -+static int host_suspend(struct tahvo_usb *tu) -+{ -+ return 0; -+} -+ -+static int host_resume(struct tahvo_usb *tu) -+{ -+ return 0; -+} -+ -+#endif -+ -+static void check_vbus_state(struct tahvo_usb *tu) -+{ -+ int reg, prev_state; -+ -+ reg = tahvo_read_reg(TAHVO_REG_IDSR); -+ if (reg & 0x01) { -+ u32 l; -+ -+ vbus_active = 1; -+ switch (tu->otg.state) { -+ case OTG_STATE_B_IDLE: -+ /* Enable the gadget driver */ -+ if (tu->otg.gadget) -+ usb_gadget_vbus_connect(tu->otg.gadget); -+ /* Set B-session valid and not B-sessio ended to indicate -+ * Vbus to be ok. */ -+ l = omap_readl(OTG_CTRL); -+ l &= ~OTG_BSESSEND; -+ l |= OTG_BSESSVLD; -+ omap_writel(l, OTG_CTRL); -+ -+ tu->otg.state = OTG_STATE_B_PERIPHERAL; -+ break; -+ case OTG_STATE_A_IDLE: -+ /* Session is now valid assuming the USB hub is driving Vbus */ -+ tu->otg.state = OTG_STATE_A_HOST; -+ host_resume(tu); -+ break; -+ default: -+ break; -+ } -+ printk("USB cable connected\n"); -+ } else { -+ switch (tu->otg.state) { -+ case OTG_STATE_B_PERIPHERAL: -+ if (tu->otg.gadget) -+ usb_gadget_vbus_disconnect(tu->otg.gadget); -+ tu->otg.state = OTG_STATE_B_IDLE; -+ break; -+ case OTG_STATE_A_HOST: -+ tu->otg.state = OTG_STATE_A_IDLE; -+ break; -+ default: -+ break; -+ } -+ printk("USB cable disconnected\n"); -+ vbus_active = 0; -+ } -+ -+ prev_state = tu->vbus_state; -+ tu->vbus_state = reg & 0x01; -+ if (prev_state != tu->vbus_state) -+ sysfs_notify(&tu->pt_dev->dev.kobj, NULL, "vbus_state"); -+} -+ -+static void tahvo_usb_become_host(struct tahvo_usb *tu) -+{ -+ u32 l; -+ -+ /* Clear system and transceiver controlled bits -+ * also mark the A-session is always valid */ -+ omap_otg_init(); -+ -+ l = omap_readl(OTG_CTRL); -+ l &= ~(OTG_CTRL_XCVR_MASK | OTG_CTRL_SYS_MASK); -+ l |= OTG_ASESSVLD; -+ omap_writel(l, OTG_CTRL); -+ -+ /* Power up the transceiver in USB host mode */ -+ tahvo_write_reg(TAHVO_REG_USBR, USBR_REGOUT | USBR_NSUSPEND | -+ USBR_MASTER_SW2 | USBR_MASTER_SW1); -+ tu->otg.state = OTG_STATE_A_IDLE; -+ -+ check_vbus_state(tu); -+} -+ -+static void tahvo_usb_stop_host(struct tahvo_usb *tu) -+{ -+ host_suspend(tu); -+ tu->otg.state = OTG_STATE_A_IDLE; -+} -+ -+static void tahvo_usb_become_peripheral(struct tahvo_usb *tu) -+{ -+ u32 l; -+ -+ /* Clear system and transceiver controlled bits -+ * and enable ID to mark peripheral mode and -+ * BSESSEND to mark no Vbus */ -+ omap_otg_init(); -+ l = omap_readl(OTG_CTRL); -+ l &= ~(OTG_CTRL_XCVR_MASK | OTG_CTRL_SYS_MASK | OTG_BSESSVLD); -+ l |= OTG_ID | OTG_BSESSEND; -+ omap_writel(l, OTG_CTRL); -+ -+ /* Power up transceiver and set it in USB perhiperal mode */ -+ tahvo_write_reg(TAHVO_REG_USBR, USBR_SLAVE_CONTROL | USBR_REGOUT | USBR_NSUSPEND | USBR_SLAVE_SW); -+ tu->otg.state = OTG_STATE_B_IDLE; -+ -+ check_vbus_state(tu); -+} -+ -+static void tahvo_usb_stop_peripheral(struct tahvo_usb *tu) -+{ -+ u32 l; -+ -+ l = omap_readl(OTG_CTRL); -+ l &= ~OTG_BSESSVLD; -+ l |= OTG_BSESSEND; -+ omap_writel(l, OTG_CTRL); -+ -+ if (tu->otg.gadget) -+ usb_gadget_vbus_disconnect(tu->otg.gadget); -+ tu->otg.state = OTG_STATE_B_IDLE; -+ -+} -+ -+static void tahvo_usb_power_off(struct tahvo_usb *tu) -+{ -+ u32 l; -+ int id; -+ -+ /* Disable gadget controller if any */ -+ if (tu->otg.gadget) -+ usb_gadget_vbus_disconnect(tu->otg.gadget); -+ -+ host_suspend(tu); -+ -+ /* Disable OTG and interrupts */ -+ if (TAHVO_MODE(tu) == TAHVO_MODE_PERIPHERAL) -+ id = OTG_ID; -+ else -+ id = 0; -+ l = omap_readl(OTG_CTRL); -+ l &= ~(OTG_CTRL_XCVR_MASK | OTG_CTRL_SYS_MASK | OTG_BSESSVLD); -+ l |= id | OTG_BSESSEND; -+ omap_writel(l, OTG_CTRL); -+ omap_writew(0, OTG_IRQ_EN); -+ -+ l = omap_readl(OTG_SYSCON_2); -+ l &= ~OTG_EN; -+ omap_writel(l, OTG_SYSCON_2); -+ -+ l = omap_readl(OTG_SYSCON_1); -+ l |= OTG_IDLE_EN; -+ omap_writel(l, OTG_SYSCON_1); -+ -+ /* Power off transceiver */ -+ tahvo_write_reg(TAHVO_REG_USBR, 0); -+ tu->otg.state = OTG_STATE_UNDEFINED; -+} -+ -+ -+static int tahvo_usb_set_power(struct otg_transceiver *dev, unsigned mA) -+{ -+ struct tahvo_usb *tu = container_of(dev, struct tahvo_usb, otg); -+ -+ dev_dbg(&tu->pt_dev->dev, "set_power %d mA\n", mA); -+ -+ if (dev->state == OTG_STATE_B_PERIPHERAL) { -+ /* REVISIT: Can Tahvo charge battery from VBUS? */ -+ } -+ return 0; -+} -+ -+static int tahvo_usb_set_suspend(struct otg_transceiver *dev, int suspend) -+{ -+ struct tahvo_usb *tu = container_of(dev, struct tahvo_usb, otg); -+ u16 w; -+ -+ dev_dbg(&tu->pt_dev->dev, "set_suspend\n"); -+ -+ w = tahvo_read_reg(TAHVO_REG_USBR); -+ if (suspend) -+ w &= ~USBR_NSUSPEND; -+ else -+ w |= USBR_NSUSPEND; -+ tahvo_write_reg(TAHVO_REG_USBR, w); -+ -+ return 0; -+} -+ -+static int tahvo_usb_start_srp(struct otg_transceiver *dev) -+{ -+ struct tahvo_usb *tu = container_of(dev, struct tahvo_usb, otg); -+ u32 otg_ctrl; -+ -+ dev_dbg(&tu->pt_dev->dev, "start_srp\n"); -+ -+ if (!dev || tu->otg.state != OTG_STATE_B_IDLE) -+ return -ENODEV; -+ -+ otg_ctrl = omap_readl(OTG_CTRL); -+ if (!(otg_ctrl & OTG_BSESSEND)) -+ return -EINVAL; -+ -+ otg_ctrl |= OTG_B_BUSREQ; -+ otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_SYS_MASK; -+ omap_writel(otg_ctrl, OTG_CTRL); -+ tu->otg.state = OTG_STATE_B_SRP_INIT; -+ -+ return 0; -+} -+ -+static int tahvo_usb_start_hnp(struct otg_transceiver *otg) -+{ -+ struct tahvo_usb *tu = container_of(otg, struct tahvo_usb, otg); -+ -+ dev_dbg(&tu->pt_dev->dev, "start_hnp\n"); -+#ifdef CONFIG_USB_OTG -+ /* REVISIT: Add this for OTG */ -+#endif -+ return -EINVAL; -+} -+ -+static int tahvo_usb_set_host(struct otg_transceiver *otg, struct usb_bus *host) -+{ -+ struct tahvo_usb *tu = container_of(otg, struct tahvo_usb, otg); -+ u32 l; -+ -+ dev_dbg(&tu->pt_dev->dev, "set_host %p\n", host); -+ -+ if (otg == NULL) -+ return -ENODEV; -+ -+#if defined(CONFIG_USB_OTG) || !defined(CONFIG_USB_GADGET_OMAP) -+ -+ mutex_lock(&tu->serialize); -+ -+ if (host == NULL) { -+ if (TAHVO_MODE(tu) == TAHVO_MODE_HOST) -+ tahvo_usb_power_off(tu); -+ tu->otg.host = NULL; -+ mutex_unlock(&tu->serialize); -+ return 0; -+ } -+ -+ l = omap_readl(OTG_SYSCON_1); -+ l &= ~(OTG_IDLE_EN | HST_IDLE_EN | DEV_IDLE_EN); -+ omap_writel(l, OTG_SYSCON_1); -+ -+ if (TAHVO_MODE(tu) == TAHVO_MODE_HOST) { -+ tu->otg.host = NULL; -+ tahvo_usb_become_host(tu); -+ } else -+ host_suspend(tu); -+ -+ tu->otg.host = host; -+ -+ mutex_unlock(&tu->serialize); -+#else -+ /* No host mode configured, so do not allow host controlled to be set */ -+ return -EINVAL; -+#endif -+ -+ return 0; -+} -+ -+static int tahvo_usb_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget) -+{ -+ struct tahvo_usb *tu = container_of(otg, struct tahvo_usb, otg); -+ -+ dev_dbg(&tu->pt_dev->dev, "set_peripheral %p\n", gadget); -+ -+ if (!otg) -+ return -ENODEV; -+ -+#if defined(CONFIG_USB_OTG) || defined(CONFIG_USB_GADGET_OMAP) -+ -+ mutex_lock(&tu->serialize); -+ -+ if (!gadget) { -+ if (TAHVO_MODE(tu) == TAHVO_MODE_PERIPHERAL) -+ tahvo_usb_power_off(tu); -+ tu->otg.gadget = NULL; -+ mutex_unlock(&tu->serialize); -+ return 0; -+ } -+ -+ tu->otg.gadget = gadget; -+ if (TAHVO_MODE(tu) == TAHVO_MODE_PERIPHERAL) -+ tahvo_usb_become_peripheral(tu); -+ -+ mutex_unlock(&tu->serialize); -+#else -+ /* No gadget mode configured, so do not allow host controlled to be set */ -+ return -EINVAL; -+#endif -+ -+ return 0; -+} -+ -+static void tahvo_usb_irq_work(struct work_struct *work) -+{ -+ struct tahvo_usb *tu = container_of(work, struct tahvo_usb, irq_work); -+ -+ mutex_lock(&tu->serialize); -+ check_vbus_state(tu); -+ mutex_unlock(&tu->serialize); -+} -+ -+static void tahvo_usb_vbus_interrupt(unsigned long arg) -+{ -+ struct tahvo_usb *tu = (struct tahvo_usb *) arg; -+ -+ tahvo_ack_irq(TAHVO_INT_VBUSON); -+ /* Seems we need this to acknowledge the interrupt */ -+ tahvo_read_reg(TAHVO_REG_IDSR); -+ schedule_work(&tu->irq_work); -+} -+ -+#ifdef CONFIG_USB_OTG -+static ssize_t otg_mode_show(struct device *device, -+ struct device_attribute *attr, char *buf) -+{ -+ struct platform_device *pdev = to_platform_device(device); -+ struct tahvo_usb *tu = platform_get_drvdata(pdev); -+ -+ switch (tu->tahvo_mode) { -+ case TAHVO_MODE_HOST: -+ return sprintf(buf, "host\n"); -+ case TAHVO_MODE_PERIPHERAL: -+ return sprintf(buf, "peripheral\n"); -+ } -+ -+ return sprintf(buf, "unknown\n"); -+} -+ -+static ssize_t otg_mode_store(struct device *device, -+ struct device_attribute *attr, -+ const char *buf, size_t count) -+{ -+ struct platform_device *pdev = to_platform_device(device); -+ struct tahvo_usb *tu = platform_get_drvdata(pdev); -+ int r; -+ -+ r = strlen(buf); -+ mutex_lock(&tu->serialize); -+ if (strncmp(buf, "host", 4) == 0) { -+ if (tu->tahvo_mode == TAHVO_MODE_PERIPHERAL) -+ tahvo_usb_stop_peripheral(tu); -+ tu->tahvo_mode = TAHVO_MODE_HOST; -+ if (tu->otg.host) { -+ printk(KERN_INFO "Selected HOST mode: host controller present.\n"); -+ tahvo_usb_become_host(tu); -+ } else { -+ printk(KERN_INFO "Selected HOST mode: no host controller, powering off.\n"); -+ tahvo_usb_power_off(tu); -+ } -+ } else if (strncmp(buf, "peripheral", 10) == 0) { -+ if (tu->tahvo_mode == TAHVO_MODE_HOST) -+ tahvo_usb_stop_host(tu); -+ tu->tahvo_mode = TAHVO_MODE_PERIPHERAL; -+ if (tu->otg.gadget) { -+ printk(KERN_INFO "Selected PERIPHERAL mode: gadget driver present.\n"); -+ tahvo_usb_become_peripheral(tu); -+ } else { -+ printk(KERN_INFO "Selected PERIPHERAL mode: no gadget driver, powering off.\n"); -+ tahvo_usb_power_off(tu); -+ } -+ } else -+ r = -EINVAL; -+ -+ mutex_unlock(&tu->serialize); -+ return r; -+} -+ -+static DEVICE_ATTR(otg_mode, 0644, otg_mode_show, otg_mode_store); -+#endif -+ -+static int tahvo_usb_probe(struct platform_device *pdev) -+{ -+ struct tahvo_usb *tu; -+ int ret; -+ -+ dev_dbg(&pdev->dev, "probe\n"); -+ -+ /* Create driver data */ -+ tu = kmalloc(sizeof(*tu), GFP_KERNEL); -+ if (!tu) -+ return -ENOMEM; -+ memset(tu, 0, sizeof(*tu)); -+ tu->pt_dev = pdev; -+#ifdef CONFIG_USB_OTG -+ /* Default mode */ -+#ifdef CONFIG_CBUS_TAHVO_USB_HOST_BY_DEFAULT -+ tu->tahvo_mode = TAHVO_MODE_HOST; -+#else -+ tu->tahvo_mode = TAHVO_MODE_PERIPHERAL; -+#endif -+#endif -+ -+ INIT_WORK(&tu->irq_work, tahvo_usb_irq_work); -+ mutex_init(&tu->serialize); -+ -+ /* Set initial state, so that we generate kevents only on -+ * state changes */ -+ tu->vbus_state = tahvo_read_reg(TAHVO_REG_IDSR) & 0x01; -+ -+ /* We cannot enable interrupt until omap_udc is initialized */ -+ ret = tahvo_request_irq(TAHVO_INT_VBUSON, tahvo_usb_vbus_interrupt, -+ (unsigned long) tu, "vbus_interrupt"); -+ if (ret != 0) { -+ kfree(tu); -+ printk(KERN_ERR "Could not register Tahvo interrupt for VBUS\n"); -+ return ret; -+ } -+ -+ /* Attributes */ -+ ret = device_create_file(&pdev->dev, &dev_attr_vbus_state); -+#ifdef CONFIG_USB_OTG -+ ret |= device_create_file(&pdev->dev, &dev_attr_otg_mode); -+#endif -+ if (ret) -+ printk(KERN_ERR "attribute creation failed: %d\n", ret); -+ -+ /* Create OTG interface */ -+ tahvo_usb_power_off(tu); -+ tu->otg.state = OTG_STATE_UNDEFINED; -+ tu->otg.label = DRIVER_NAME; -+ tu->otg.set_host = tahvo_usb_set_host; -+ tu->otg.set_peripheral = tahvo_usb_set_peripheral; -+ tu->otg.set_power = tahvo_usb_set_power; -+ tu->otg.set_suspend = tahvo_usb_set_suspend; -+ tu->otg.start_srp = tahvo_usb_start_srp; -+ tu->otg.start_hnp = tahvo_usb_start_hnp; -+ -+ ret = otg_set_transceiver(&tu->otg); -+ if (ret < 0) { -+ printk(KERN_ERR "Cannot register USB transceiver\n"); -+ kfree(tu); -+ tahvo_free_irq(TAHVO_INT_VBUSON); -+ return ret; -+ } -+ -+ platform_set_drvdata(pdev, tu); -+ -+ /* Act upon current vbus state once at startup. A vbus state irq may or -+ * may not be generated in addition to this. */ -+ schedule_work(&tu->irq_work); -+ return 0; -+} -+ -+static int tahvo_usb_remove(struct platform_device *pdev) -+{ -+ dev_dbg(&pdev->dev, "remove\n"); -+ -+ tahvo_free_irq(TAHVO_INT_VBUSON); -+ flush_scheduled_work(); -+ otg_set_transceiver(0); -+ device_remove_file(&pdev->dev, &dev_attr_vbus_state); -+#ifdef CONFIG_USB_OTG -+ device_remove_file(&pdev->dev, &dev_attr_otg_mode); -+#endif -+ return 0; -+} -+ -+static struct platform_driver tahvo_usb_driver = { -+ .probe = tahvo_usb_probe, -+ .remove = tahvo_usb_remove, -+ .driver = { -+ .name = "tahvo-usb", -+ } -+}; -+ -+static struct platform_device tahvo_usb_device = { -+ .name = "tahvo-usb", -+ .id = -1, -+}; -+ -+static int __init tahvo_usb_init(void) -+{ -+ int ret = 0; -+ -+ printk(KERN_INFO "Tahvo USB transceiver driver initializing\n"); -+ -+ ret = platform_driver_register(&tahvo_usb_driver); -+ if (ret) -+ return ret; -+ ret = platform_driver_register(&omap_otg_driver); -+ if (ret) { -+ platform_driver_unregister(&tahvo_usb_driver); -+ return ret; -+ } -+ -+ ret = platform_device_register(&tahvo_usb_device); -+ if (ret) { -+ platform_driver_unregister(&omap_otg_driver); -+ platform_driver_unregister(&tahvo_usb_driver); -+ return ret; -+ } -+ -+ return 0; -+} -+subsys_initcall(tahvo_usb_init); -+ -+static void __exit tahvo_usb_exit(void) -+{ -+ platform_device_unregister(&tahvo_usb_device); -+ platform_driver_unregister(&omap_otg_driver); -+ platform_driver_unregister(&tahvo_usb_driver); -+} -+module_exit(tahvo_usb_exit); -+ -+MODULE_DESCRIPTION("Tahvo USB OTG Transceiver Driver"); -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Juha Yrjölä, Tony Lindgren, and Timo Teräs"); ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/tahvo-user.c -@@ -0,0 +1,407 @@ -+/** -+ * drivers/cbus/tahvo-user.c -+ * -+ * Tahvo user space interface functions -+ * -+ * Copyright (C) 2004, 2005 Nokia Corporation -+ * -+ * Written by Mikko Ylinen <mikko.k.ylinen@nokia.com> -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#include <linux/types.h> -+#include <linux/kernel.h> -+#include <linux/interrupt.h> -+#include <linux/module.h> -+#include <linux/init.h> -+#include <linux/fs.h> -+#include <linux/miscdevice.h> -+#include <linux/poll.h> -+#include <linux/list.h> -+#include <linux/spinlock.h> -+#include <linux/sched.h> -+#include <linux/mutex.h> -+#include <linux/slab.h> -+ -+#include <asm/uaccess.h> -+ -+#include "tahvo.h" -+ -+#include "user_retu_tahvo.h" -+ -+/* Maximum size of IRQ node buffer/pool */ -+#define TAHVO_MAX_IRQ_BUF_LEN 16 -+ -+#define PFX "tahvo-user: " -+ -+/* Bitmap for marking the interrupt sources as having the handlers */ -+static u32 tahvo_irq_bits; -+ -+/* For allowing only one user process to subscribe to the tahvo interrupts */ -+static struct file *tahvo_irq_subscr = NULL; -+ -+/* For poll and IRQ passing */ -+struct tahvo_irq { -+ u32 id; -+ struct list_head node; -+}; -+ -+static spinlock_t tahvo_irqs_lock; -+static struct tahvo_irq *tahvo_irq_block; -+static LIST_HEAD(tahvo_irqs); -+static LIST_HEAD(tahvo_irqs_reserve); -+ -+/* Wait queue - used when user wants to read the device */ -+DECLARE_WAIT_QUEUE_HEAD(tahvo_user_waitqueue); -+ -+/* Semaphore to protect irq subscription sequence */ -+static struct mutex tahvo_mutex; -+ -+/* This array specifies TAHVO register types (read/write/toggle) */ -+static const u8 tahvo_access_bits[] = { -+ 1, -+ 4, -+ 1, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3, -+ 3, -+ 1 -+}; -+ -+/* -+ * The handler for all TAHVO interrupts. -+ * -+ * arg is the interrupt source in TAHVO. -+ */ -+static void tahvo_user_irq_handler(unsigned long arg) -+{ -+ struct tahvo_irq *irq; -+ -+ /* user has to re-enable the interrupt once ready -+ * for receiving them again */ -+ tahvo_disable_irq(arg); -+ tahvo_ack_irq(arg); -+ -+ spin_lock(&tahvo_irqs_lock); -+ if (list_empty(&tahvo_irqs_reserve)) { -+ spin_unlock(&tahvo_irqs_lock); -+ return; -+ } -+ irq = list_entry((&tahvo_irqs_reserve)->next, struct tahvo_irq, node); -+ irq->id = arg; -+ list_move_tail(&irq->node, &tahvo_irqs); -+ spin_unlock(&tahvo_irqs_lock); -+ -+ /* wake up waiting thread */ -+ wake_up(&tahvo_user_waitqueue); -+} -+ -+/* -+ * This routine sets up the interrupt handler and marks an interrupt source -+ * in TAHVO as a candidate for signal delivery to the user process. -+ */ -+static int tahvo_user_subscribe_to_irq(int id, struct file *filp) -+{ -+ int ret; -+ -+ mutex_lock(&tahvo_mutex); -+ if ((tahvo_irq_subscr != NULL) && (tahvo_irq_subscr != filp)) { -+ mutex_unlock(&tahvo_mutex); -+ return -EBUSY; -+ } -+ /* Store the file pointer of the first user process registering IRQs */ -+ tahvo_irq_subscr = filp; -+ mutex_unlock(&tahvo_mutex); -+ -+ if (tahvo_irq_bits & (1 << id)) -+ return 0; -+ -+ ret = tahvo_request_irq(id, tahvo_user_irq_handler, id, ""); -+ if (ret < 0) -+ return ret; -+ -+ /* Mark that this interrupt has a handler */ -+ tahvo_irq_bits |= 1 << id; -+ -+ return 0; -+} -+ -+/* -+ * Unregister all TAHVO interrupt handlers -+ */ -+static void tahvo_unreg_irq_handlers(void) -+{ -+ int id; -+ -+ if (!tahvo_irq_bits) -+ return; -+ -+ for (id = 0; id < MAX_TAHVO_IRQ_HANDLERS; id++) -+ if (tahvo_irq_bits & (1 << id)) -+ tahvo_free_irq(id); -+ -+ tahvo_irq_bits = 0; -+} -+ -+/* -+ * Write to TAHVO register. -+ * Returns 0 upon success, a negative error value otherwise. -+ */ -+static int tahvo_user_write_with_mask(u32 field, u16 value) -+{ -+ u32 mask; -+ u32 reg; -+ u_short tmp; -+ unsigned long flags; -+ -+ mask = MASK(field); -+ reg = REG(field); -+ -+ /* Detect bad mask and reg */ -+ if (mask == 0 || reg > TAHVO_REG_MAX || -+ tahvo_access_bits[reg] == READ_ONLY) { -+ printk(KERN_ERR PFX "invalid arguments (reg=%#x, mask=%#x)\n", -+ reg, mask); -+ return -EINVAL; -+ } -+ -+ /* Justify value according to mask */ -+ while (!(mask & 1)) { -+ value = value << 1; -+ mask = mask >> 1; -+ } -+ -+ spin_lock_irqsave(&tahvo_lock, flags); -+ if (tahvo_access_bits[reg] == TOGGLE) { -+ /* No need to detect previous content of register */ -+ tmp = 0; -+ } else { -+ /* Read current value of register */ -+ tmp = tahvo_read_reg(reg); -+ } -+ /* Generate a new value */ -+ tmp = (tmp & ~MASK(field)) | (value & MASK(field)); -+ /* Write data to TAHVO */ -+ tahvo_write_reg(reg, tmp); -+ spin_unlock_irqrestore(&tahvo_lock, flags); -+ -+ return 0; -+} -+ -+/* -+ * Read TAHVO register. -+ */ -+static u32 tahvo_user_read_with_mask(u32 field) -+{ -+ u_short value; -+ u32 mask, reg; -+ -+ mask = MASK(field); -+ reg = REG(field); -+ -+ /* Detect bad mask and reg */ -+ if (mask == 0 || reg > TAHVO_REG_MAX) { -+ printk(KERN_ERR PFX "invalid arguments (reg=%#x, mask=%#x)\n", -+ reg, mask); -+ return -EINVAL; -+ } -+ -+ /* Read the register */ -+ value = tahvo_read_reg(reg) & mask; -+ -+ /* Right justify value */ -+ while (!(mask & 1)) { -+ value = value >> 1; -+ mask = mask >> 1; -+ } -+ -+ return value; -+} -+ -+/* -+ * Close device -+ */ -+static int tahvo_close(struct inode *inode, struct file *filp) -+{ -+ /* Unregister all interrupts that have been registered */ -+ if (tahvo_irq_subscr == filp) { -+ tahvo_unreg_irq_handlers(); -+ tahvo_irq_subscr = NULL; -+ } -+ -+ return 0; -+} -+ -+/* -+ * Device control (ioctl) -+ */ -+static int tahvo_ioctl(struct inode *inode, struct file *filp, -+ unsigned int cmd, unsigned long arg) -+{ -+ struct retu_tahvo_write_parms par; -+ int ret; -+ -+ switch (cmd) { -+ case URT_IOCT_IRQ_SUBSCR: -+ return tahvo_user_subscribe_to_irq(arg, filp); -+ case TAHVO_IOCH_READ: -+ return tahvo_user_read_with_mask(arg); -+ case TAHVO_IOCX_WRITE: -+ ret = copy_from_user(&par, (void __user *) arg, sizeof(par)); -+ if (ret) -+ printk(KERN_ERR "copy_from_user failed: %d\n", ret); -+ par.result = tahvo_user_write_with_mask(par.field, par.value); -+ ret = copy_to_user((void __user *) arg, &par, sizeof(par)); -+ if (ret) -+ printk(KERN_ERR "copy_to_user failed: %d\n", ret); -+ break; -+ default: -+ return -ENOIOCTLCMD; -+ } -+ return 0; -+} -+ -+/* -+ * Read from device -+ */ -+static ssize_t tahvo_read(struct file *filp, char *buf, size_t count, -+ loff_t * offp) -+{ -+ struct tahvo_irq *irq; -+ -+ u32 nr, i; -+ -+ /* read not permitted if neither filp nor anyone has registered IRQs */ -+ if (tahvo_irq_subscr != filp) -+ return -EPERM; -+ -+ if ((count < sizeof(u32)) || ((count % sizeof(u32)) != 0)) -+ return -EINVAL; -+ -+ nr = count / sizeof(u32); -+ -+ for (i = 0; i < nr; i++) { -+ unsigned long flags; -+ u32 irq_id; -+ int ret; -+ -+ ret = wait_event_interruptible(tahvo_user_waitqueue, -+ !list_empty(&tahvo_irqs)); -+ if (ret < 0) -+ return ret; -+ -+ spin_lock_irqsave(&tahvo_irqs_lock, flags); -+ irq = list_entry((&tahvo_irqs)->next, struct tahvo_irq, node); -+ irq_id = irq->id; -+ list_move(&irq->node, &tahvo_irqs_reserve); -+ spin_unlock_irqrestore(&tahvo_irqs_lock, flags); -+ -+ ret = copy_to_user(buf + i * sizeof(irq_id), &irq_id, -+ sizeof(irq_id)); -+ if (ret) -+ printk(KERN_ERR "copy_to_user failed: %d\n", ret); -+ } -+ -+ return count; -+} -+ -+/* -+ * Poll method -+ */ -+static unsigned tahvo_poll(struct file *filp, struct poll_table_struct *pt) -+{ -+ if (!list_empty(&tahvo_irqs)) -+ return POLLIN; -+ -+ poll_wait(filp, &tahvo_user_waitqueue, pt); -+ -+ if (!list_empty(&tahvo_irqs)) -+ return POLLIN; -+ else -+ return 0; -+} -+ -+static struct file_operations tahvo_user_fileops = { -+ .owner = THIS_MODULE, -+ .ioctl = tahvo_ioctl, -+ .read = tahvo_read, -+ .release = tahvo_close, -+ .poll = tahvo_poll -+}; -+ -+static struct miscdevice tahvo_device = { -+ .minor = MISC_DYNAMIC_MINOR, -+ .name = "tahvo", -+ .fops = &tahvo_user_fileops -+}; -+ -+/* -+ * Initialization -+ * -+ * @return 0 if successful, error value otherwise. -+ */ -+int tahvo_user_init(void) -+{ -+ struct tahvo_irq *irq; -+ int res, i; -+ -+ irq = kmalloc(sizeof(*irq) * TAHVO_MAX_IRQ_BUF_LEN, GFP_KERNEL); -+ if (irq == NULL) { -+ printk(KERN_ERR PFX "kmalloc failed\n"); -+ return -ENOMEM; -+ } -+ memset(irq, 0, sizeof(*irq) * TAHVO_MAX_IRQ_BUF_LEN); -+ for (i = 0; i < TAHVO_MAX_IRQ_BUF_LEN; i++) -+ list_add(&irq[i].node, &tahvo_irqs_reserve); -+ -+ tahvo_irq_block = irq; -+ -+ spin_lock_init(&tahvo_irqs_lock); -+ mutex_init(&tahvo_mutex); -+ -+ /* Request a misc device */ -+ res = misc_register(&tahvo_device); -+ if (res < 0) { -+ printk(KERN_ERR PFX "unable to register misc device for %s\n", -+ tahvo_device.name); -+ kfree(irq); -+ return res; -+ } -+ -+ return 0; -+} -+ -+/* -+ * Cleanup. -+ */ -+void tahvo_user_cleanup(void) -+{ -+ /* Unregister our misc device */ -+ misc_deregister(&tahvo_device); -+ /* Unregister and disable all TAHVO interrupts */ -+ tahvo_unreg_irq_handlers(); -+ kfree(tahvo_irq_block); -+} -+ -+MODULE_DESCRIPTION("Tahvo ASIC user space functions"); -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Mikko Ylinen"); ---- /dev/null -+++ linux-2.6.35.3/drivers/cbus/user_retu_tahvo.h -@@ -0,0 +1,75 @@ -+/** -+ * drivers/cbus/user_retu_tahvo.h -+ * -+ * Copyright (C) 2004, 2005 Nokia Corporation -+ * -+ * Written by Mikko Ylinen <mikko.k.ylinen@nokia.com> -+ * -+ * Definitions and types used by both retu-user and tahvo-user. -+ * -+ * This file is subject to the terms and conditions of the GNU General -+ * Public License. See the file "COPYING" in the main directory of this -+ * archive for more details. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#ifndef _USER_RETU_TAHVO_H -+#define _USER_RETU_TAHVO_H -+ -+/* Chip IDs */ -+#define CHIP_RETU 1 -+#define CHIP_TAHVO 2 -+ -+/* Register access type bits */ -+#define READ_ONLY 1 -+#define WRITE_ONLY 2 -+#define READ_WRITE 3 -+#define TOGGLE 4 -+ -+#define MASK(field) ((u16)(field & 0xFFFF)) -+#define REG(field) ((u16)((field >> 16) & 0x3F)) -+ -+/*** IOCTL definitions. These should be kept in sync with user space **********/ -+ -+#define URT_IOC_MAGIC '`' -+ -+/* -+ * IOCTL function naming conventions: -+ * ================================== -+ * 0 -- No argument and return value -+ * S -- Set through a pointer -+ * T -- Tell directly with the argument value -+ * G -- Reply by setting through a pointer -+ * Q -- response is on the return value -+ * X -- S and G atomically -+ * H -- T and Q atomically -+ */ -+ -+/* General */ -+#define URT_IOCT_IRQ_SUBSCR _IO(URT_IOC_MAGIC, 0) -+ -+/* RETU */ -+#define RETU_IOCH_READ _IO(URT_IOC_MAGIC, 1) -+#define RETU_IOCX_WRITE _IO(URT_IOC_MAGIC, 2) -+#define RETU_IOCH_ADC_READ _IO(URT_IOC_MAGIC, 3) -+ -+/* TAHVO */ -+#define TAHVO_IOCH_READ _IO(URT_IOC_MAGIC, 4) -+#define TAHVO_IOCX_WRITE _IO(URT_IOC_MAGIC, 5) -+ -+/* This structure is used for writing RETU/TAHVO registers */ -+struct retu_tahvo_write_parms { -+ u32 field; -+ u16 value; -+ u8 result; -+}; -+ -+#endif ---- linux-2.6.35.3.orig/drivers/Makefile -+++ linux-2.6.35.3/drivers/Makefile -@@ -74,7 +74,7 @@ obj-$(CONFIG_GAMEPORT) += input/gamepor - obj-$(CONFIG_INPUT) += input/ - obj-$(CONFIG_I2O) += message/ - obj-$(CONFIG_RTC_LIB) += rtc/ --obj-y += i2c/ media/ -+obj-y += i2c/ media/ cbus/ - obj-$(CONFIG_PPS) += pps/ - obj-$(CONFIG_W1) += w1/ - obj-$(CONFIG_POWER_SUPPLY) += power/ ---- linux-2.6.35.3.orig/arch/arm/Kconfig -+++ linux-2.6.35.3/arch/arm/Kconfig -@@ -1681,6 +1681,10 @@ source "net/Kconfig" - - source "drivers/Kconfig" - -+if ARCH_OMAP -+source "drivers/cbus/Kconfig" -+endif -+ - source "fs/Kconfig" - - source "arch/arm/Kconfig.debug" |