diff options
Diffstat (limited to 'target/linux/omap24xx/patches-3.1/315-n800-touchscreen-and-keypad-drivers.patch')
| -rw-r--r-- | target/linux/omap24xx/patches-3.1/315-n800-touchscreen-and-keypad-drivers.patch | 2813 |
1 files changed, 2813 insertions, 0 deletions
diff --git a/target/linux/omap24xx/patches-3.1/315-n800-touchscreen-and-keypad-drivers.patch b/target/linux/omap24xx/patches-3.1/315-n800-touchscreen-and-keypad-drivers.patch new file mode 100644 index 0000000000..8366566bc2 --- /dev/null +++ b/target/linux/omap24xx/patches-3.1/315-n800-touchscreen-and-keypad-drivers.patch @@ -0,0 +1,2813 @@ +From 63e56392b9024aceb610d7b4e1979e2d2cebd217 Mon Sep 17 00:00:00 2001 +From: Marat Radchenko <marat@slonopotamus.org> +Date: Tue, 18 Oct 2011 21:48:23 +0400 +Subject: [PATCH 1/2] TSC2301 driver (touchscreen and keypad) + +This patch adds support for TSC2301 touchscreen/keypad/audio chip found on Nokia N800. +Touchscreen and keypad are fully functional, audio part only provides power management. +--- + drivers/input/keyboard/Kconfig | 6 + + drivers/input/keyboard/Makefile | 1 + + drivers/input/keyboard/tsc2301_kp.c | 475 +++++++++++++++ + drivers/input/touchscreen/Kconfig | 6 + + drivers/input/touchscreen/Makefile | 1 + + drivers/input/touchscreen/tsc2301_ts.c | 676 +++++++++++++++++++++ + drivers/spi/Kconfig | 22 + + drivers/spi/Makefile | 3 + + drivers/spi/tsc2301-core.c | 297 ++++++++++ + drivers/spi/tsc2301-mixer.c | 1003 ++++++++++++++++++++++++++++++++ + include/linux/spi/tsc2301.h | 208 +++++++ + 11 files changed, 2698 insertions(+), 0 deletions(-) + create mode 100644 drivers/input/keyboard/tsc2301_kp.c + create mode 100644 drivers/input/touchscreen/tsc2301_ts.c + create mode 100644 drivers/spi/tsc2301-core.c + create mode 100644 drivers/spi/tsc2301-mixer.c + create mode 100644 include/linux/spi/tsc2301.h + +Index: linux-3.1-rc4/drivers/input/keyboard/Kconfig +=================================================================== +--- linux-3.1-rc4.orig/drivers/input/keyboard/Kconfig 2011-10-29 22:14:01.548849676 +0200 ++++ linux-3.1-rc4/drivers/input/keyboard/Kconfig 2011-10-29 22:14:10.444812519 +0200 +@@ -530,6 +530,12 @@ config KEYBOARD_TNETV107X + To compile this driver as a module, choose M here: the + module will be called tnetv107x-keypad. + ++config KEYBOARD_TSC2301 ++ tristate "TSC2301 keypad support" ++ depends on SPI_TSC2301 ++ help ++ Say Y here for if you are using the keypad features of TSC2301. ++ + config KEYBOARD_TWL4030 + tristate "TI TWL4030/TWL5030/TPS659x0 keypad support" + depends on TWL4030_CORE +Index: linux-3.1-rc4/drivers/input/keyboard/Makefile +=================================================================== +--- linux-3.1-rc4.orig/drivers/input/keyboard/Makefile 2011-10-29 22:14:01.560849628 +0200 ++++ linux-3.1-rc4/drivers/input/keyboard/Makefile 2011-10-29 22:14:10.444812519 +0200 +@@ -48,6 +48,7 @@ obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd + obj-$(CONFIG_KEYBOARD_TC3589X) += tc3589x-keypad.o + obj-$(CONFIG_KEYBOARD_TEGRA) += tegra-kbc.o + obj-$(CONFIG_KEYBOARD_TNETV107X) += tnetv107x-keypad.o ++obj-$(CONFIG_KEYBOARD_TSC2301) += tsc2301_kp.o + obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o + obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o + obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o +Index: linux-3.1-rc4/drivers/input/keyboard/tsc2301_kp.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-3.1-rc4/drivers/input/keyboard/tsc2301_kp.c 2011-10-29 22:27:48.875046931 +0200 +@@ -0,0 +1,475 @@ ++/* ++ * TSC2301 keypad driver ++ * ++ * Copyright (C) 2005-2006 Nokia Corporation ++ * ++ * Written by Jarkko Oikarinen ++ * Rewritten by Juha Yrjola <juha.yrjola@nokia.com> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * 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/input.h> ++#include <linux/interrupt.h> ++#include <linux/irq.h> ++#include <linux/delay.h> ++#include <linux/spi/spi.h> ++ ++#include <linux/spi/tsc2301.h> ++ ++#define TSC2301_KEYBOARD_PRODUCT_ID 0x0051 ++#define TSC2301_KEYBOARD_PRODUCT_VERSION 0x0001 ++#define TSC2301_DEBOUNCE_TIME_2MS 0x0000 ++#define TSC2301_DEBOUNCE_TIME_10MS 0x0800 ++#define TSC2301_DEBOUNCE_TIME_20MS 0x1000 ++#define TSC2301_DEBOUNCE_TIME_50MS 0x1800 ++#define TSC2301_DEBOUNCE_TIME_60MS 0x2000 ++#define TSC2301_DEBOUNCE_TIME_80MS 0x2800 ++#define TSC2301_DEBOUNCE_TIME_100MS 0x3000 ++#define TSC2301_DEBOUNCE_TIME_120MS 0x3800 ++ ++#define TSC2301_DEBOUNCE_TIME TSC2301_DEBOUNCE_TIME_20MS ++ ++#define TSC2301_RELEASE_TIMEOUT 50 ++ ++struct tsc2301_kp { ++ struct input_dev *idev; ++ char phys[32]; ++ spinlock_t lock; ++ struct mutex mutex; ++ struct timer_list timer; ++ u16 keys_pressed; ++ unsigned pending:1; ++ unsigned user_disabled:1; ++ unsigned disable_depth; ++ ++ struct spi_transfer read_xfer[4]; ++ struct spi_message read_msg; ++ ++ u16 data; ++ u16 mask; ++ ++ int irq; ++ s16 keymap[16]; ++}; ++ ++static inline int tsc2301_kp_disabled(struct tsc2301 *tsc) ++{ ++ return tsc->kp->disable_depth != 0; ++} ++ ++static void tsc2301_kp_send_key_events(struct tsc2301 *tsc, ++ u16 prev_state, ++ u16 new_state) ++{ ++ struct tsc2301_kp *kp = tsc->kp; ++ u16 common, released, pressed; ++ int i; ++ ++ common = prev_state & new_state; ++ released = common ^ prev_state; ++ pressed = common ^ new_state; ++ if (!released && !pressed) ++ return; ++ for (i = 0; i < 16 && (released || pressed); i++) { ++ if (released & 1) { ++ dev_dbg(&tsc->spi->dev, "key %d released\n", i); ++ input_report_key(kp->idev, kp->keymap[i], 0); ++ } ++ released >>= 1; ++ if (pressed & 1) { ++ dev_dbg(&tsc->spi->dev, "key %d pressed\n", i); ++ input_report_key(kp->idev, kp->keymap[i], 1); ++ } ++ pressed >>= 1; ++ } ++ input_sync(kp->idev); ++} ++ ++static inline void _filter_out(struct tsc2301 *tsc, u16 prev_state, ++ u16 *new_state, int row1, int row2, u8 rect_pat) ++{ ++ u16 mask; ++ ++ mask = (rect_pat << (row1 * 4)) | (rect_pat << (row2 * 4)); ++ mask &= ~prev_state; ++ *new_state &= ~mask; ++ dev_dbg(&tsc->spi->dev, "filtering ghost keys %02x\n", mask); ++} ++ ++static void tsc2301_filter_ghost_keys(struct tsc2301 *tsc, u16 prev_state, ++ u16 *new_state) ++{ ++ int row1, row2; ++ u16 key_map; ++ u16 row1_map; ++ static const u8 rect_pat[] = { ++ 0x3, 0x5, 0x9, 0x6, 0xa, 0xc, 0, ++ }; ++ ++ key_map = *new_state; ++ for (row1 = 0; row1 < 4; row1++) { ++ row1_map = (key_map >> (row1 * 4)) & 0xf; ++ if (!row1_map) ++ continue; ++ for (row2 = row1 + 1; row2 < 4; row2++) { ++ u16 rect_map = (key_map >> (row2 * 4)) & 0xf; ++ const u8 *rp; ++ ++ rect_map &= row1_map; ++ if (!rect_map) ++ continue; ++ for (rp = rect_pat; *rp; rp++) ++ if ((rect_map & *rp) == *rp) ++ _filter_out(tsc, prev_state, new_state, ++ row1, row2, *rp); ++ } ++ } ++} ++ ++static void tsc2301_kp_timer(unsigned long arg) ++{ ++ struct tsc2301 *tsc = (void *) arg; ++ struct tsc2301_kp *kp = tsc->kp; ++ unsigned long flags; ++ ++ tsc2301_kp_send_key_events(tsc, kp->keys_pressed, 0); ++ spin_lock_irqsave(&kp->lock, flags); ++ kp->keys_pressed = 0; ++ spin_unlock_irqrestore(&kp->lock, flags); ++} ++ ++static void tsc2301_kp_rx(void *arg) ++{ ++ struct tsc2301 *tsc = arg; ++ struct tsc2301_kp *kp = tsc->kp; ++ unsigned long flags; ++ u16 kp_data; ++ ++ kp_data = kp->data; ++ dev_dbg(&tsc->spi->dev, "KP data %04x\n", kp_data); ++ ++ tsc2301_filter_ghost_keys(tsc, kp->keys_pressed, &kp_data); ++ tsc2301_kp_send_key_events(tsc, kp->keys_pressed, kp_data); ++ spin_lock_irqsave(&kp->lock, flags); ++ kp->keys_pressed = kp_data; ++ kp->pending = 0; ++ spin_unlock_irqrestore(&kp->lock, flags); ++} ++ ++static irqreturn_t tsc2301_kp_irq_handler(int irq, void *dev_id) ++{ ++ struct tsc2301 *tsc = dev_id; ++ struct tsc2301_kp *kp = tsc->kp; ++ unsigned long flags; ++ int r; ++ ++ spin_lock_irqsave(&kp->lock, flags); ++ if (tsc2301_kp_disabled(tsc)) { ++ spin_unlock_irqrestore(&kp->lock, flags); ++ return IRQ_HANDLED; ++ } ++ kp->pending = 1; ++ spin_unlock_irqrestore(&kp->lock, flags); ++ mod_timer(&kp->timer, ++ jiffies + msecs_to_jiffies(TSC2301_RELEASE_TIMEOUT)); ++ r = spi_async(tsc->spi, &tsc->kp->read_msg); ++ if (r) ++ dev_err(&tsc->spi->dev, "kp: spi_async() failed"); ++ return IRQ_HANDLED; ++} ++ ++static void tsc2301_kp_start_scan(struct tsc2301 *tsc) ++{ ++ tsc2301_write_reg(tsc, TSC2301_REG_KPMASK, tsc->kp->mask); ++ tsc2301_write_reg(tsc, TSC2301_REG_KEY, TSC2301_DEBOUNCE_TIME); ++} ++ ++static void tsc2301_kp_stop_scan(struct tsc2301 *tsc) ++{ ++ tsc2301_write_reg(tsc, TSC2301_REG_KEY, 1 << 14); ++} ++ ++/* Must be called with the mutex held */ ++static void tsc2301_kp_enable(struct tsc2301 *tsc) ++{ ++ struct tsc2301_kp *kp = tsc->kp; ++ unsigned long flags; ++ ++ spin_lock_irqsave(&kp->lock, flags); ++ BUG_ON(!tsc2301_kp_disabled(tsc)); ++ if (--kp->disable_depth != 0) { ++ spin_unlock_irqrestore(&kp->lock, flags); ++ return; ++ } ++ spin_unlock_irqrestore(&kp->lock, flags); ++ ++ irq_set_irq_type(kp->irq, IRQ_TYPE_EDGE_FALLING); ++ tsc2301_kp_start_scan(tsc); ++ enable_irq(kp->irq); ++} ++ ++/* Must be called with the mutex held */ ++static int tsc2301_kp_disable(struct tsc2301 *tsc, int release_keys) ++{ ++ struct tsc2301_kp *kp = tsc->kp; ++ unsigned long flags; ++ ++ spin_lock_irqsave(&kp->lock, flags); ++ if (kp->disable_depth++ != 0) { ++ spin_unlock_irqrestore(&kp->lock, flags); ++ goto out; ++ } ++ disable_irq_nosync(kp->irq); ++ irq_set_irq_type(kp->irq, IRQ_TYPE_NONE); ++ spin_unlock_irqrestore(&kp->lock, flags); ++ ++ while (kp->pending) { ++ msleep(1); ++ } ++ ++ tsc2301_kp_stop_scan(tsc); ++out: ++ if (!release_keys) ++ del_timer(&kp->timer); /* let timeout release keys */ ++ ++ return 0; ++} ++ ++/* The following workaround is needed for a HW bug triggered by the ++ * following: ++ * 1. keep any key pressed ++ * 2. disable keypad ++ * 3. release all keys ++ * 4. reenable keypad ++ * 5. disable touch screen controller ++ * ++ * After this the keypad scanner will get stuck in busy state and won't ++ * report any interrupts for further keypresses. One way to recover is to ++ * restart the keypad scanner whenever we enable / disable the ++ * touchscreen controller. ++ */ ++void tsc2301_kp_restart(struct tsc2301 *tsc) ++{ ++ if (!tsc2301_kp_disabled(tsc)) { ++ tsc2301_kp_start_scan(tsc); ++ } ++} ++ ++static ssize_t tsc2301_kp_disable_show(struct device *dev, ++ struct device_attribute *attr, char *buf) ++{ ++ struct tsc2301 *tsc = dev_get_drvdata(dev); ++ ++ return sprintf(buf, "%u\n", tsc2301_kp_disabled(tsc) ? 1 : 0); ++} ++ ++static ssize_t tsc2301_kp_disable_store(struct device *dev, ++ struct device_attribute *attr, ++ const char *buf, size_t count) ++{ ++ struct tsc2301 *tsc = dev_get_drvdata(dev); ++ struct tsc2301_kp *kp = tsc->kp; ++ char *endp; ++ int i; ++ ++ i = simple_strtoul(buf, &endp, 10); ++ i = i ? 1 : 0; ++ ++ mutex_lock(&kp->mutex); ++ if (i == kp->user_disabled) { ++ mutex_unlock(&kp->mutex); ++ return count; ++ } ++ kp->user_disabled = i; ++ ++ if (i) ++ tsc2301_kp_disable(tsc, 1); ++ else ++ tsc2301_kp_enable(tsc); ++ mutex_unlock(&kp->mutex); ++ ++ return count; ++} ++ ++static DEVICE_ATTR(disable_kp, 0664, tsc2301_kp_disable_show, ++ tsc2301_kp_disable_store); ++ ++static const u16 tsc2301_kp_read_data = 0x8000 | TSC2301_REG_KPDATA; ++ ++static void tsc2301_kp_setup_spi_xfer(struct tsc2301 *tsc) ++{ ++ struct tsc2301_kp *kp = tsc->kp; ++ struct spi_message *m = &kp->read_msg; ++ struct spi_transfer *x = &kp->read_xfer[0]; ++ ++ spi_message_init(&kp->read_msg); ++ ++ x->tx_buf = &tsc2301_kp_read_data; ++ x->len = 2; ++ spi_message_add_tail(x, m); ++ x++; ++ ++ x->rx_buf = &kp->data; ++ x->len = 2; ++ spi_message_add_tail(x, m); ++ ++ m->complete = tsc2301_kp_rx; ++ m->context = tsc; ++} ++ ++#ifdef CONFIG_PM ++int tsc2301_kp_suspend(struct tsc2301 *tsc) ++{ ++ struct tsc2301_kp *kp = tsc->kp; ++ ++ mutex_lock(&kp->mutex); ++ tsc2301_kp_disable(tsc, 1); ++ mutex_unlock(&kp->mutex); ++ return 0; ++} ++ ++void tsc2301_kp_resume(struct tsc2301 *tsc) ++{ ++ struct tsc2301_kp *kp = tsc->kp; ++ ++ mutex_lock(&kp->mutex); ++ tsc2301_kp_enable(tsc); ++ mutex_unlock(&kp->mutex); ++} ++#endif ++ ++int __devinit tsc2301_kp_init(struct tsc2301 *tsc, ++ struct tsc2301_platform_data *pdata) ++{ ++ struct input_dev *idev; ++ struct tsc2301_kp *kp; ++ int r, i; ++ u16 mask; ++ ++ if (pdata->keyb_int < 0) { ++ dev_err(&tsc->spi->dev, "need kbirq"); ++ return -EINVAL; ++ } ++ ++ kp = kzalloc(sizeof(*kp), GFP_KERNEL); ++ if (kp == NULL) ++ return -ENOMEM; ++ tsc->kp = kp; ++ ++ kp->irq = pdata->keyb_int; ++ spin_lock_init(&kp->lock); ++ mutex_init(&kp->mutex); ++ ++ init_timer(&kp->timer); ++ kp->timer.data = (unsigned long) tsc; ++ kp->timer.function = tsc2301_kp_timer; ++ ++ idev = input_allocate_device(); ++ if (idev == NULL) { ++ r = -ENOMEM; ++ goto err1; ++ } ++ if (pdata->keyb_name) ++ idev->name = pdata->keyb_name; ++ else ++ idev->name = "TSC2301 keypad"; ++ snprintf(kp->phys, sizeof(kp->phys), "%s/input-kp", dev_name(&tsc->spi->dev)); ++ idev->phys = kp->phys; ++ ++ mask = 0; ++ idev->evbit[0] = BIT(EV_KEY); ++ for (i = 0; i < 16; i++) { ++ if (pdata->keymap[i] > 0) { ++ set_bit(pdata->keymap[i], idev->keybit); ++ kp->keymap[i] = pdata->keymap[i]; ++ } else { ++ kp->keymap[i] = -1; ++ mask |= 1 << i; ++ } ++ } ++ ++ if (pdata->kp_rep) ++ set_bit(EV_REP, idev->evbit); ++ ++ kp->idev = idev; ++ ++ tsc2301_kp_setup_spi_xfer(tsc); ++ ++ r = device_create_file(&tsc->spi->dev, &dev_attr_disable_kp); ++ if (r < 0) ++ goto err2; ++ ++ tsc2301_kp_start_scan(tsc); ++ ++ /* IRQ mode 0 is faulty, it can cause the KBIRQ to get stuck. ++ * Mode 2 deasserts the IRQ at: ++ * - HW or SW reset ++ * - Setting SCS flag in REG_KEY register ++ * - Releasing all keys ++ * - Reading the REG_KPDATA ++ */ ++ tsc2301_write_kbc(tsc, 2); ++ ++ tsc2301_write_reg(tsc, TSC2301_REG_KPMASK, mask); ++ kp->mask = mask; ++ ++ irq_set_irq_type(kp->irq, IRQ_TYPE_EDGE_FALLING); ++ ++ r = request_irq(kp->irq, tsc2301_kp_irq_handler, IRQF_SAMPLE_RANDOM, ++ "tsc2301-kp", tsc); ++ if (r < 0) { ++ dev_err(&tsc->spi->dev, "unable to get kbirq IRQ"); ++ goto err3; ++ } ++ irq_set_irq_wake(kp->irq, 1); ++ ++ /* We need to read the register once..? */ ++ tsc2301_read_reg(tsc, TSC2301_REG_KPDATA); ++ ++ r = input_register_device(idev); ++ if (r < 0) { ++ dev_err(&tsc->spi->dev, "can't register keypad device\n"); ++ goto err4; ++ } ++ ++ return 0; ++ ++err4: ++ free_irq(kp->irq, tsc); ++err3: ++ tsc2301_kp_stop_scan(tsc); ++ device_remove_file(&tsc->spi->dev, &dev_attr_disable_kp); ++err2: ++ input_free_device(kp->idev); ++err1: ++ kfree(kp); ++ return r; ++} ++ ++void __devexit tsc2301_kp_exit(struct tsc2301 *tsc) ++{ ++ struct tsc2301_kp *kp = tsc->kp; ++ ++ tsc2301_kp_disable(tsc, 1); ++ input_unregister_device(kp->idev); ++ free_irq(kp->irq, tsc); ++ device_remove_file(&tsc->spi->dev, &dev_attr_disable_kp); ++ ++ kfree(kp); ++} +Index: linux-3.1-rc4/drivers/input/touchscreen/Kconfig +=================================================================== +--- linux-3.1-rc4.orig/drivers/input/touchscreen/Kconfig 2011-10-29 22:14:01.532849745 +0200 ++++ linux-3.1-rc4/drivers/input/touchscreen/Kconfig 2011-10-29 22:14:10.444812519 +0200 +@@ -673,6 +673,12 @@ config TOUCHSCREEN_TSC2007 + To compile this driver as a module, choose M here: the + module will be called tsc2007. + ++config TOUCHSCREEN_TSC2301 ++ tristate "TSC2301 touchscreen support" ++ depends on SPI_TSC2301 ++ help ++ Say Y here for if you are using the touchscreen features of TSC2301. ++ + config TOUCHSCREEN_W90X900 + tristate "W90P910 touchscreen driver" + depends on HAVE_CLK +Index: linux-3.1-rc4/drivers/input/touchscreen/Makefile +=================================================================== +--- linux-3.1-rc4.orig/drivers/input/touchscreen/Makefile 2011-10-29 22:14:01.544849693 +0200 ++++ linux-3.1-rc4/drivers/input/touchscreen/Makefile 2011-10-29 22:14:10.444812519 +0200 +@@ -48,6 +48,7 @@ obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += + obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o + obj-$(CONFIG_TOUCHSCREEN_TSC2005) += tsc2005.o + obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o ++obj-$(CONFIG_TOUCHSCREEN_TSC2301) += tsc2301_ts.o + obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o + obj-$(CONFIG_TOUCHSCREEN_WACOM_W8001) += wacom_w8001.o + obj-$(CONFIG_TOUCHSCREEN_WM831X) += wm831x-ts.o +Index: linux-3.1-rc4/drivers/input/touchscreen/tsc2301_ts.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-3.1-rc4/drivers/input/touchscreen/tsc2301_ts.c 2011-10-29 22:29:36.693801882 +0200 +@@ -0,0 +1,676 @@ ++/* ++ * TSC2301 touchscreen driver ++ * ++ * Copyright (C) 2005-2008 Nokia Corporation ++ * ++ * Written by Jarkko Oikarinen, Imre Deak and Juha Yrjola ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * 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/input.h> ++#include <linux/interrupt.h> ++#include <linux/delay.h> ++#include <linux/spi/spi.h> ++ ++#include <linux/spi/tsc2301.h> ++ ++/** ++ * The touchscreen interface operates as follows: ++ * ++ * Initialize: ++ * Request access to GPIO103 (DAV) ++ * tsc2301_ts_irq_handler will trigger when DAV line goes down ++ * ++ * 1) Pen is pressed against touchscreeen ++ * 2) TSC2301 performs AD conversion ++ * 3) After the conversion is done TSC2301 drives DAV line down ++ * 4) GPIO IRQ is received and tsc2301_ts_irq_handler is called ++ * 5) tsc2301_ts_irq_handler queues up an spi transfer to fetch ++ * the x, y, z1, z2 values ++ * 6) SPI framework calls tsc2301_ts_rx after the coordinates are read ++ * 7) When the penup_timer expires, there have not been DAV interrupts ++ * during the last 20ms which means the pen has been lifted. ++ */ ++ ++ ++#define TSC2301_TOUCHSCREEN_PRODUCT_ID 0x0052 ++#define TSC2301_TOUCHSCREEN_PRODUCT_VERSION 0x0001 ++ ++#define TSC2301_TS_PENUP_TIME 20 ++ ++#define TSC2301_ADCREG_CONVERSION_CTRL_BY_TSC2301 0x8000 ++#define TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST 0x0000 ++ ++#define TSC2301_ADCREG_FUNCTION_NONE 0x0000 ++#define TSC2301_ADCREG_FUNCTION_XY 0x0400 ++#define TSC2301_ADCREG_FUNCTION_XYZ 0x0800 ++#define TSC2301_ADCREG_FUNCTION_X 0x0C00 ++#define TSC2301_ADCREG_FUNCTION_Y 0x1000 ++#define TSC2301_ADCREG_FUNCTION_Z 0x1400 ++#define TSC2301_ADCREG_FUNCTION_DAT1 0x1800 ++#define TSC2301_ADCREG_FUNCTION_DAT2 0x1C00 ++#define TSC2301_ADCREG_FUNCTION_AUX1 0x2000 ++#define TSC2301_ADCREG_FUNCTION_AUX2 0x2400 ++#define TSC2301_ADCREG_FUNCTION_TEMP 0x2800 ++ ++#define TSC2301_ADCREG_RESOLUTION_8BIT 0x0100 ++#define TSC2301_ADCREG_RESOLUTION_10BIT 0x0200 ++#define TSC2301_ADCREG_RESOLUTION_12BIT 0x0300 ++ ++#define TSC2301_ADCREG_AVERAGING_NONE 0x0000 ++#define TSC2301_ADCREG_AVERAGING_4AVG 0x0040 ++#define TSC2301_ADCREG_AVERAGING_8AVG 0x0080 ++#define TSC2301_ADCREG_AVERAGING_16AVG 0x00C0 ++ ++#define TSC2301_ADCREG_CLOCK_8MHZ 0x0000 ++#define TSC2301_ADCREG_CLOCK_4MHZ 0x0010 ++#define TSC2301_ADCREG_CLOCK_2MHZ 0x0020 ++#define TSC2301_ADCREG_CLOCK_1MHZ 0x0030 ++ ++#define TSC2301_ADCREG_VOLTAGE_STAB_0US 0x0000 ++#define TSC2301_ADCREG_VOLTAGE_STAB_100US 0x0002 ++#define TSC2301_ADCREG_VOLTAGE_STAB_500US 0x0004 ++#define TSC2301_ADCREG_VOLTAGE_STAB_1MS 0x0006 ++#define TSC2301_ADCREG_VOLTAGE_STAB_5MS 0x0008 ++#define TSC2301_ADCREG_VOLTAGE_STAB_10MS 0x000A ++#define TSC2301_ADCREG_VOLTAGE_STAB_50MS 0x000C ++#define TSC2301_ADCREG_VOLTAGE_STAB_100MS 0x000E ++ ++#define TSC2301_ADCREG_STOP_CONVERSION 0x4000 ++ ++#define MAX_12BIT ((1 << 12) - 1) ++ ++#define TS_RECT_SIZE 8 ++#define TSF_MIN_Z1 100 ++#define TSF_MAX_Z2 4000 ++ ++#define TSF_SAMPLES 4 ++ ++struct ts_filter { ++ int sample_cnt; ++ ++ int avg_x; ++ int avg_y; ++ int avg_z1; ++ int avg_z2; ++}; ++ ++struct ts_coords { ++ u16 x; ++ u16 y; ++ u16 z1; ++ u16 z2; ++}; ++ ++struct tsc2301_ts { ++ struct input_dev *idev; ++ char phys[32]; ++ struct timer_list penup_timer; ++ struct mutex mutex; ++ ++ struct spi_transfer read_xfer[2]; ++ struct spi_message read_msg; ++ struct ts_coords *coords; ++ ++ struct ts_filter filter; ++ ++ int hw_avg_max; ++ u16 x; ++ u16 y; ++ u16 p; ++ ++ u16 x_plate_ohm; ++ int stab_time; ++ int max_pressure; ++ int touch_pressure; ++ ++ u8 event_sent; ++ u8 pen_down; ++ u8 disabled; ++ u8 disable_depth; ++ ++ int hw_flags; ++ int irq; ++}; ++ ++ ++static const u16 tsc2301_ts_read_data = 0x8000 | TSC2301_REG_X; ++ ++static int tsc2301_ts_check_config(struct tsc2301_ts *ts, int *hw_flags) ++{ ++ int flags; ++ ++ flags = 0; ++ switch (ts->hw_avg_max) { ++ case 0: ++ flags |= TSC2301_ADCREG_AVERAGING_NONE; ++ break; ++ case 4: ++ flags |= TSC2301_ADCREG_AVERAGING_4AVG; ++ break; ++ case 8: ++ flags |= TSC2301_ADCREG_AVERAGING_8AVG; ++ break; ++ case 16: ++ flags |= TSC2301_ADCREG_AVERAGING_16AVG; ++ break; ++ default: ++ return -EINVAL; ++ } ++ ++ switch (ts->stab_time) { ++ case 0: ++ flags |= TSC2301_ADCREG_VOLTAGE_STAB_0US; ++ break; ++ case 100: ++ flags |= TSC2301_ADCREG_VOLTAGE_STAB_100US; ++ break; ++ case 500: ++ flags |= TSC2301_ADCREG_VOLTAGE_STAB_500US; ++ break; ++ case 1000: ++ flags |= TSC2301_ADCREG_VOLTAGE_STAB_1MS; ++ break; ++ case 5000: ++ flags |= TSC2301_ADCREG_VOLTAGE_STAB_5MS; ++ break; ++ case 10000: ++ flags |= TSC2301_ADCREG_VOLTAGE_STAB_10MS; ++ break; ++ case 50000: ++ flags |= TSC2301_ADCREG_VOLTAGE_STAB_50MS; ++ break; ++ case 100000: ++ flags |= TSC2301_ADCREG_VOLTAGE_STAB_100MS; ++ break; ++ default: ++ return -EINVAL; ++ } ++ ++ *hw_flags = flags; ++ return 0; ++} ++ ++/* ++ * This odd three-time initialization is to work around a bug in TSC2301. ++ * See TSC2301 errata for details. ++ */ ++static int tsc2301_ts_configure(struct tsc2301 *tsc, int flags) ++{ ++ struct spi_transfer xfer[5]; ++ struct spi_transfer *x; ++ struct spi_message m; ++ int i; ++ u16 val1, val2, val3; ++ u16 data[10]; ++ ++ val1 = TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST | ++ TSC2301_ADCREG_STOP_CONVERSION | ++ TSC2301_ADCREG_FUNCTION_NONE | ++ TSC2301_ADCREG_RESOLUTION_12BIT | ++ TSC2301_ADCREG_AVERAGING_NONE | ++ TSC2301_ADCREG_CLOCK_2MHZ | ++ TSC2301_ADCREG_VOLTAGE_STAB_100MS; ++ ++ val2 = TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST | ++ TSC2301_ADCREG_FUNCTION_XYZ | ++ TSC2301_ADCREG_RESOLUTION_12BIT | ++ TSC2301_ADCREG_AVERAGING_16AVG | ++ TSC2301_ADCREG_CLOCK_1MHZ | ++ TSC2301_ADCREG_VOLTAGE_STAB_100MS; ++ ++ /* Averaging and voltage stabilization settings in flags */ ++ val3 = TSC2301_ADCREG_CONVERSION_CTRL_BY_TSC2301 | ++ TSC2301_ADCREG_FUNCTION_XYZ | ++ TSC2301_ADCREG_RESOLUTION_12BIT | ++ TSC2301_ADCREG_CLOCK_2MHZ | ++ flags; ++ ++ /* Now we prepare the command for transferring */ ++ data[0] = TSC2301_REG_ADC; ++ data[1] = val1; ++ data[2] = TSC2301_REG_ADC; ++ data[3] = val2; ++ data[4] = TSC2301_REG_ADC; ++ data[5] = val3; ++ data[6] = TSC2301_REG_REF; ++ data[7] = 1 << 4 | 1 << 2 | 1; /* intref, 100uS settl, 2.5V ref */ ++ data[8] = TSC2301_REG_CONFIG; ++ data[9] = 3 << 3 | 2 << 0; /* 340uS pre-chrg, 544us delay */ ++ ++ spi_message_init(&m); ++ m.spi = tsc->spi; ++ ++ memset(xfer, 0, sizeof(xfer)); ++ x = &xfer[0]; ++ ++ for (i = 0; i < 10; i += 2) { ++ x->tx_buf = &data[i]; ++ x->len = 4; ++ if (i != 8) ++ x->cs_change = 1; ++ spi_message_add_tail(x, &m); ++ x++; ++ } ++ spi_sync(m.spi, &m); ++ ++ return 0; ++} ++ ++static void tsc2301_ts_start_scan(struct tsc2301 *tsc) ++{ ++ tsc2301_ts_configure(tsc, tsc->ts->hw_flags); ++ tsc2301_kp_restart(tsc); ++} ++ ++static void tsc2301_ts_stop_scan(struct tsc2301 *tsc) ++{ ++ tsc2301_write_reg(tsc, TSC2301_REG_ADC, TSC2301_ADCREG_STOP_CONVERSION); ++ tsc2301_kp_restart(tsc); ++} ++ ++static void update_pen_state(struct tsc2301_ts *ts, int x, int y, int pressure) ++{ ++ if (pressure) { ++ input_report_abs(ts->idev, ABS_X, x); ++ input_report_abs(ts->idev, ABS_Y, y); ++ input_report_abs(ts->idev, ABS_PRESSURE, pressure); ++ if (!ts->pen_down) ++ input_report_key(ts->idev, BTN_TOUCH, 1); ++ ts->pen_down = 1; ++ } else { ++ input_report_abs(ts->idev, ABS_PRESSURE, 0); ++ if (ts->pen_down) ++ input_report_key(ts->idev, BTN_TOUCH, 0); ++ ts->pen_down = 0; ++ } ++ ++ input_sync(ts->idev); ++ ++#ifdef VERBOSE ++ dev_dbg(&tsc->spi->dev, "x %4d y %4d p %4d\n", x, y, pressure); ++#endif ++} ++ ++static int filter(struct tsc2301_ts *ts, int x, int y, int z1, int z2) ++{ ++ int inside_rect, pressure_limit, Rt; ++ struct ts_filter *tsf = &ts->filter; ++ ++ /* validate pressure and position */ ++ if (x > MAX_12BIT || y > MAX_12BIT) ++ return 0; ++ ++ /* skip coords if the pressure-components are out of range */ ++ if (z1 < TSF_MIN_Z1 || z2 > TSF_MAX_Z2) ++ return 0; ++ ++ /* Use the x,y,z1,z2 directly on the first "pen down" event */ ++ if (ts->event_sent) { ++ tsf->avg_x += x; ++ tsf->avg_y += y; ++ tsf->avg_z1 += z1; ++ tsf->avg_z2 += z2; ++ ++ if (++tsf->sample_cnt < TSF_SAMPLES) ++ return 0; ++ x = tsf->avg_x / TSF_SAMPLES; ++ y = tsf->avg_y / TSF_SAMPLES; ++ z1 = tsf->avg_z1 / TSF_SAMPLES; ++ z2 = tsf->avg_z2 / TSF_SAMPLES; ++ } ++ tsf->sample_cnt = 0; ++ tsf->avg_x = 0; ++ tsf->avg_y = 0; ++ tsf->avg_z1 = 0; ++ tsf->avg_z2 = 0; ++ ++ pressure_limit = ts->event_sent? ts->max_pressure: ts->touch_pressure; ++ ++ /* z1 is always at least 100: */ ++ Rt = x * (z2 - z1) / z1; ++ Rt = Rt * ts->x_plate_ohm / 4096; ++ if (Rt > pressure_limit) ++ return 0; ++ ++ /* discard the event if it still is within the previous rect - unless ++ * if the pressure is harder, but then use previous x,y position */ ++ inside_rect = ( ++ x > (int)ts->x - TS_RECT_SIZE && x < (int)ts->x + TS_RECT_SIZE && ++ y > (int)ts->y - TS_RECT_SIZE && y < (int)ts->y + TS_RECT_SIZE); ++ ++ if (!ts->event_sent || !inside_rect) { ++ ts->x = x; ++ ts->y = y; ++ ts->p = Rt; ++ return 1; ++ } else if (Rt < ts->p) { ++ ts->p = Rt; ++ return 1; ++ } ++ return 0; ++} ++ ++/* ++ * This procedure is called by the SPI framework after the coordinates ++ * have been read from TSC2301 ++ */ ++static void tsc2301_ts_rx(void *arg) ++{ ++ struct tsc2301 *tsc = arg; ++ struct tsc2301_ts *ts = tsc->ts; ++ int send_event; ++ int x, y, z1, z2; ++ ++ x = ts->coords->x; ++ y = ts->coords->y; ++ z1 = ts->coords->z1; ++ z2 = ts->coords->z2; ++ ++ send_event = filter(ts, x, y, z1, z2); ++ if (send_event) { ++ update_pen_state(ts, ts->x, ts->y, ts->p); ++ ts->event_sent = 1; ++ } ++ ++ mod_timer(&ts->penup_timer, ++ jiffies + msecs_to_jiffies(TSC2301_TS_PENUP_TIME)); ++} ++ ++/* ++ * Timer is called TSC2301_TS_PENUP_TIME after pen is up ++ */ ++static void tsc2301_ts_timer_handler(unsigned long data) ++{ ++ struct tsc2301 *tsc = (struct tsc2301 *)data; ++ struct tsc2301_ts *ts = tsc->ts; ++ ++ if (ts->event_sent) { ++ ts->event_sent = 0; ++ update_pen_state(ts, 0, 0, 0); ++ } ++} ++ ++/* ++ * This interrupt is called when pen is down and coordinates are ++ * available. That is indicated by a falling edge on DEV line. ++ */ ++static irqreturn_t tsc2301_ts_irq_handler(int irq, void *dev_id) ++{ ++ struct tsc2301 *tsc = dev_id; ++ struct tsc2301_ts *ts = tsc->ts; ++ int r; ++ ++ r = spi_async(tsc->spi, &ts->read_msg); ++ if (r) ++ dev_err(&tsc->spi->dev, "ts: spi_async() failed"); ++ ++ mod_timer(&ts->penup_timer, ++ jiffies + msecs_to_jiffies(TSC2301_TS_PENUP_TIME)); ++ ++ return IRQ_HANDLED; ++} ++ ++static void tsc2301_ts_disable(struct tsc2301 *tsc) ++{ ++ struct tsc2301_ts *ts = tsc->ts; ++ ++ if (ts->disable_depth++ != 0) ++ return; ++ ++ disable_irq(ts->irq); ++ ++ /* wait until penup timer expire normally */ ++ do { ++ msleep(1); ++ } while (ts->event_sent); ++ ++ tsc2301_ts_stop_scan(tsc); ++} ++ ++static void tsc2301_ts_enable(struct tsc2301 *tsc) ++{ ++ struct tsc2301_ts *ts = tsc->ts; ++ ++ if (--ts->disable_depth != 0) ++ return; ++ ++ enable_irq(ts->irq); ++ ++ tsc2301_ts_start_scan(tsc); ++} ++ ++#ifdef CONFIG_PM ++int tsc2301_ts_suspend(struct tsc2301 *tsc) ++{ ++ struct tsc2301_ts *ts = tsc->ts; ++ ++ mutex_lock(&ts->mutex); ++ tsc2301_ts_disable(tsc); ++ mutex_unlock(&ts->mutex); ++ ++ return 0; ++} ++ ++void tsc2301_ts_resume(struct tsc2301 *tsc) ++{ ++ struct tsc2301_ts *ts = tsc->ts; ++ ++ mutex_lock(&ts->mutex); ++ tsc2301_ts_enable(tsc); ++ mutex_unlock(&ts->mutex); ++} ++#endif ++ ++static void tsc2301_ts_setup_spi_xfer(struct tsc2301 *tsc) ++{ ++ struct tsc2301_ts *ts = tsc->ts; ++ struct spi_message *m = &ts->read_msg; ++ struct spi_transfer *x = &ts->read_xfer[0]; ++ ++ spi_message_init(m); ++ ++ x->tx_buf = &tsc2301_ts_read_data; ++ x->len = 2; ++ spi_message_add_tail(x, m); ++ ++ x++; ++ x->rx_buf = ts->coords; ++ x->len = 8; ++ spi_message_add_tail(x, m); ++ ++ m->complete = tsc2301_ts_rx; ++ m->context = tsc; ++} ++ ++static ssize_t tsc2301_ts_pen_down_show(struct device *dev, ++ struct device_attribute *attr, ++ char *buf) ++{ ++ struct tsc2301 *tsc = dev_get_drvdata(dev); ++ ++ return sprintf(buf, "%u\n", tsc->ts->pen_down); ++} ++ ++static DEVICE_ATTR(pen_down, S_IRUGO, tsc2301_ts_pen_down_show, NULL); ++ ++static ssize_t tsc2301_ts_disable_show(struct device *dev, ++ struct device_attribute *attr, char *buf) ++{ ++ struct tsc2301 *tsc = dev_get_drvdata(dev); ++ struct tsc2301_ts *ts = tsc->ts; ++ ++ return sprintf(buf, "%u\n", ts->disabled); ++} ++ ++static ssize_t tsc2301_ts_disable_store(struct device *dev, ++ struct device_attribute *attr, ++ const char *buf, size_t count) ++{ ++ struct tsc2301 *tsc = dev_get_drvdata(dev); ++ struct tsc2301_ts *ts = tsc->ts; ++ char *endp; ++ int i; ++ ++ i = simple_strtoul(buf, &endp, 10); ++ i = i ? 1 : 0; ++ mutex_lock(&ts->mutex); ++ if (i == ts->disabled) goto out; ++ ts->disabled = i; ++ ++ if (i) ++ tsc2301_ts_disable(tsc); ++ else ++ tsc2301_ts_enable(tsc); ++out: ++ mutex_unlock(&ts->mutex); ++ return count; ++} ++ ++static DEVICE_ATTR(disable_ts, 0664, tsc2301_ts_disable_show, ++ tsc2301_ts_disable_store); ++ ++int __devinit tsc2301_ts_init(struct tsc2301 *tsc, ++ struct tsc2301_platform_data *pdata) ++{ ++ struct tsc2301_ts *ts; ++ struct input_dev *idev; ++ int r; ++ int x_max, y_max; ++ int x_fudge, y_fudge, p_fudge; ++ ++ if (pdata->dav_int <= 0) { ++ dev_err(&tsc->spi->dev, "need DAV IRQ"); ++ return -EINVAL; ++ } ++ ++ ts = kzalloc(sizeof(*ts), GFP_KERNEL); ++ if (ts == NULL) ++ return -ENOMEM; ++ tsc->ts = ts; ++ ++ ts->coords = kzalloc(sizeof(*ts->coords), GFP_KERNEL); ++ if (ts->coords == NULL) { ++ kfree(ts); ++ return -ENOMEM; ++ } ++ ++ ts->irq = pdata->dav_int; ++ ++ init_timer(&ts->penup_timer); ++ setup_timer(&ts->penup_timer, tsc2301_ts_timer_handler, ++ (unsigned long)tsc); ++ ++ mutex_init(&ts->mutex); ++ ++ ts->x_plate_ohm = pdata->ts_x_plate_ohm ? : 280; ++ ts->hw_avg_max = pdata->ts_hw_avg; ++ ts->max_pressure = pdata->ts_max_pressure ? : MAX_12BIT; ++ ts->touch_pressure = pdata->ts_touch_pressure ? : ts->max_pressure; ++ ts->stab_time = pdata->ts_stab_time; ++ ++ x_max = pdata->ts_x_max ? : 4096; ++ y_max = pdata->ts_y_max ? : 4096; ++ x_fudge = pdata->ts_x_fudge ? : 4; ++ y_fudge = pdata->ts_y_fudge ? : 8; ++ p_fudge = pdata->ts_pressure_fudge ? : 2; ++ ++ if ((r = tsc2301_ts_check_config(ts, &ts->hw_flags))) { ++ dev_err(&tsc->spi->dev, "invalid configuration\n"); ++ goto err2; ++ } ++ ++ idev = input_allocate_device(); ++ if (idev == NULL) { ++ r = -ENOMEM; ++ goto err2; ++ } ++ idev->name = "TSC2301 touchscreen"; ++ snprintf(ts->phys, sizeof(ts->phys), ++ "%s/input-ts", dev_name(&tsc->spi->dev)); ++ idev->phys = ts->phys; ++ idev->dev.parent = &tsc->spi->dev; ++ ++ idev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY); ++ idev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE); ++ ts->idev = idev; ++ ++ tsc2301_ts_setup_spi_xfer(tsc); ++ ++ /* These parameters should perhaps be configurable? */ ++ input_set_abs_params(idev, ABS_X, 0, x_max, x_fudge, 0); ++ input_set_abs_params(idev, ABS_Y, 0, y_max, y_fudge, 0); ++ input_set_abs_params(idev, ABS_PRESSURE, 0, ts->max_pressure, ++ p_fudge, 0); ++ ++ tsc2301_ts_start_scan(tsc); ++ ++ r = request_irq(ts->irq, tsc2301_ts_irq_handler, ++ IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_FALLING, ++ "tsc2301-ts", tsc); ++ if (r < 0) { ++ dev_err(&tsc->spi->dev, "unable to get DAV IRQ"); ++ goto err3; ++ } ++ irq_set_irq_wake(ts->irq, 1); ++ ++ if (device_create_file(&tsc->spi->dev, &dev_attr_pen_down) < 0) ++ goto err4; ++ if (device_create_file(&tsc->spi->dev, &dev_attr_disable_ts) < 0) ++ goto err5; ++ ++ r = input_register_device(idev); ++ if (r < 0) { ++ dev_err(&tsc->spi->dev, "can't register touchscreen device\n"); ++ goto err6; ++ } ++ ++ return 0; ++err6: ++ device_remove_file(&tsc->spi->dev, &dev_attr_disable_ts); ++err5: ++ device_remove_file(&tsc->spi->dev, &dev_attr_pen_down); ++err4: ++ free_irq(ts->irq, tsc); ++err3: ++ tsc2301_ts_stop_scan(tsc); ++ input_free_device(idev); ++err2: ++ kfree(ts->coords); ++ kfree(ts); ++ return r; ++} ++ ++void __devexit tsc2301_ts_exit(struct tsc2301 *tsc) ++{ ++ struct tsc2301_ts *ts = tsc->ts; ++ ++ tsc2301_ts_disable(tsc); ++ ++ device_remove_file(&tsc->spi->dev, &dev_attr_disable_ts); ++ device_remove_file(&tsc->spi->dev, &dev_attr_pen_down); ++ ++ free_irq(ts->irq, tsc); ++ input_unregister_device(ts->idev); ++ ++ kfree(ts->coords); ++ kfree(ts); ++} ++MODULE_AUTHOR("Jarkko Oikarinen <jarkko.oikarinen@nokia.com>"); ++MODULE_LICENSE("GPL"); +Index: linux-3.1-rc4/drivers/spi/Kconfig +=================================================================== +--- linux-3.1-rc4.orig/drivers/spi/Kconfig 2011-10-29 22:14:10.260813287 +0200 ++++ linux-3.1-rc4/drivers/spi/Kconfig 2011-10-29 22:14:10.448812502 +0200 +@@ -435,6 +435,28 @@ config SPI_TLE62X0 + sysfs interface, with each line presented as a kind of GPIO + exposing both switch control and diagnostic feedback. + ++config SPI_TSC2301 ++ tristate "TSC2301 driver" ++ depends on SPI_MASTER ++ help ++ Say Y here if you have a TSC2301 chip connected to an SPI ++ bus on your board. ++ ++ The TSC2301 is a highly integrated PDA analog interface circuit. ++ It contains a complete 12-bit A/D resistive touch screen ++ converter (ADC) including drivers, touch pressure measurement ++ capability, keypad controller, and 8-bit D/A converter (DAC) output ++ for LCD contrast control. ++ ++ To compile this driver as a module, choose M here: the ++ module will be called tsc2301. ++ ++config SPI_TSC2301_AUDIO ++ boolean "TSC2301 audio support" ++ depends on SPI_TSC2301 && SND ++ help ++ Say Y here for if you are using the audio features of TSC2301. ++ + # + # Add new SPI protocol masters in alphabetical order above this line + # +Index: linux-3.1-rc4/drivers/spi/Makefile +=================================================================== +--- linux-3.1-rc4.orig/drivers/spi/Makefile 2011-10-29 22:14:10.260813287 +0200 ++++ linux-3.1-rc4/drivers/spi/Makefile 2011-10-29 22:14:10.448812502 +0200 +@@ -59,4 +59,6 @@ obj-$(CONFIG_SPI_TLE62X0) += spi-tle62x + obj-$(CONFIG_SPI_TOPCLIFF_PCH) += spi-topcliff-pch.o + obj-$(CONFIG_SPI_TXX9) += spi-txx9.o + obj-$(CONFIG_SPI_XILINX) += spi-xilinx.o +- ++obj-$(CONFIG_SPI_TSC2301) += tsc2301.o ++tsc2301-objs := tsc2301-core.o ++tsc2301-$(CONFIG_SPI_TSC2301_AUDIO) += tsc2301-mixer.o +Index: linux-3.1-rc4/drivers/spi/tsc2301-core.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-3.1-rc4/drivers/spi/tsc2301-core.c 2011-10-29 22:14:10.448812502 +0200 +@@ -0,0 +1,297 @@ ++/* ++ * TSC2301 driver ++ * ++ * Copyright (C) 2005, 2006 Nokia Corporation ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * 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/device.h> ++#include <linux/delay.h> ++#include <linux/gpio.h> ++#include <linux/spi/spi.h> ++#include <linux/spi/tsc2301.h> ++ ++u16 tsc2301_read_reg(struct tsc2301 *tsc, int reg) ++{ ++ struct spi_transfer t[2]; ++ struct spi_message m; ++ u16 data = 0, cmd; ++ ++ cmd = reg; ++ cmd |= 0x8000; ++ ++ memset(t, 0, sizeof(t)); ++ spi_message_init(&m); ++ m.spi = tsc->spi; ++ ++ t[0].tx_buf = &cmd; ++ t[0].rx_buf = NULL; ++ t[0].len = 2; ++ spi_message_add_tail(&t[0], &m); ++ ++ t[1].tx_buf = NULL; ++ t[1].rx_buf = &data; ++ t[1].len = 2; ++ spi_message_add_tail(&t[1], &m); ++ ++ spi_sync(m.spi, &m); ++ ++ return data; ++} ++ ++void tsc2301_write_reg(struct tsc2301 *tsc, int reg, u16 val) ++{ ++ struct spi_transfer t; ++ struct spi_message m; ++ u16 data[2]; ++ ++ /* Now we prepare the command for transferring */ ++ data[0] = reg; ++ data[1] = val; ++ ++ spi_message_init(&m); ++ m.spi = tsc->spi; ++ ++ memset(&t, 0, sizeof(t)); ++ t.tx_buf = data; ++ t.rx_buf = NULL; ++ t.len = 4; ++ spi_message_add_tail(&t, &m); ++ ++ spi_sync(m.spi, &m); ++} ++ ++void tsc2301_write_kbc(struct tsc2301 *tsc, int val) ++{ ++ u16 w; ++ ++ w = tsc->config2_shadow; ++ w &= ~(0x03 << 14); ++ w |= (val & 0x03) << 14; ++ tsc2301_write_reg(tsc, TSC2301_REG_CONFIG2, w); ++ tsc->config2_shadow = w; ++} ++ ++void tsc2301_write_pll(struct tsc2301 *tsc, ++ int pll_n, int pll_a, int pll_pdc, int pct_e, int pll_o) ++{ ++ u16 w; ++ ++ w = tsc->config2_shadow; ++ w &= ~0x3fff; ++ w |= (pll_n & 0x0f) | ((pll_a & 0x0f) << 4) | ((pll_pdc & 0x0f) << 8); ++ w |= pct_e ? (1 << 12) : 0; ++ w |= pll_o ? (1 << 13) : 0; ++ tsc2301_write_reg(tsc, TSC2301_REG_CONFIG2, w); ++ tsc->config2_shadow = w; ++} ++ ++void tsc2301_read_buf(struct tsc2301 *tsc, int reg, u16 *rx_buf, int len) ++{ ++ struct spi_transfer t[2]; ++ struct spi_message m; ++ u16 cmd, i; ++ ++ cmd = reg; ++ cmd |= 0x8000; ++ ++ spi_message_init(&m); ++ m.spi = tsc->spi; ++ ++ memset(t, 0, sizeof(t)); ++ t[0].tx_buf = &cmd; ++ t[0].rx_buf = NULL; ++ t[0].len = 2; ++ spi_message_add_tail(&t[0], &m); ++ ++ t[1].tx_buf = NULL; ++ t[1].rx_buf = rx_buf; ++ t[1].len = 2 * len; ++ spi_message_add_tail(&t[1], &m); ++ ++ spi_sync(m.spi, &m); ++ ++ for (i = 0; i < len; i++) ++ printk(KERN_DEBUG "rx_buf[%d]: %04x\n", i, rx_buf[i]); ++} ++ ++static int __devinit tsc2301_probe(struct spi_device *spi) ++{ ++ struct tsc2301 *tsc; ++ struct tsc2301_platform_data *pdata = spi->dev.platform_data; ++ int r; ++ u16 w; ++ ++ if (!pdata) { ++ dev_dbg(&spi->dev, "no platform data?\n"); ++ return -ENODEV; ++ } ++ ++ tsc = kzalloc(sizeof(*tsc), GFP_KERNEL); ++ if (tsc == NULL) ++ return -ENOMEM; ++ ++ dev_set_drvdata(&spi->dev, tsc); ++ tsc->spi = spi; ++ ++ tsc->enable_clock = pdata->enable_clock; ++ tsc->disable_clock = pdata->disable_clock; ++ ++ if (pdata->reset_gpio >= 0) { ++ tsc->reset_gpio = pdata->reset_gpio; ++ r = gpio_request(tsc->reset_gpio, "TSC2301 reset"); ++ if (r < 0) ++ goto err1; ++ gpio_direction_output(tsc->reset_gpio, 1); ++ mdelay(1); ++ gpio_set_value(tsc->reset_gpio, 0); ++ } else ++ tsc->reset_gpio = -1; ++ ++ spi->mode = SPI_MODE_1; ++ spi->bits_per_word = 16; ++ /* The max speed might've been defined by the board-specific ++ * struct */ ++ if (!spi->max_speed_hz) ++ spi->max_speed_hz = TSC2301_HZ; ++ spi_setup(spi); ++ ++ /* Soft reset */ ++ tsc2301_write_reg(tsc, TSC2301_REG_RESET, 0xbb00); ++ msleep(1); ++ ++ w = tsc2301_read_reg(tsc, TSC2301_REG_ADC); ++ if (!(w & (1 << 14))) { ++ dev_err(&spi->dev, "invalid ADC reg value: %04x\n", w); ++ r = -ENODEV; ++ goto err1; ++ } ++ ++ w = tsc2301_read_reg(tsc, TSC2301_REG_DAC); ++ if (!(w & (1 << 15))) { ++ dev_err(&spi->dev, "invalid DAC reg value: %04x\n", w); ++ r = -ENODEV; ++ goto err1; ++ } ++ ++ /* Stop keypad scanning */ ++ tsc2301_write_reg(tsc, TSC2301_REG_KEY, 0x4000); ++ ++ /* We have to cache this for read-modify-write, since we can't ++ * read back BIT15 */ ++ w = tsc2301_read_reg(tsc, TSC2301_REG_CONFIG2); ++ /* By default BIT15 is set */ ++ w |= 1 << 15; ++ tsc->config2_shadow = w; ++ ++ r = tsc2301_kp_init(tsc, pdata); ++ if (r) ++ goto err1; ++ r = tsc2301_ts_init(tsc, pdata); ++ if (r) ++ goto err2; ++ r = tsc2301_mixer_init(tsc, pdata); ++ if (r) ++ goto err3; ++ return 0; ++ ++err3: ++ tsc2301_ts_exit(tsc); ++err2: ++ tsc2301_kp_exit(tsc); ++err1: ++ kfree(tsc); ++ return r; ++} ++ ++static int __devexit tsc2301_remove(struct spi_device *spi) ++{ ++ struct tsc2301 *tsc = dev_get_drvdata(&spi->dev); ++ ++ tsc2301_mixer_exit(tsc); ++ tsc2301_ts_exit(tsc); ++ tsc2301_kp_exit(tsc); ++ if (tsc->reset_gpio >= 0) ++ gpio_free(tsc->reset_gpio); ++ kfree(tsc); ++ ++ return 0; ++} ++ ++#ifdef CONFIG_PM ++static int tsc2301_suspend(struct spi_device *spi, pm_message_t mesg) ++{ ++ struct tsc2301 *tsc = dev_get_drvdata(&spi->dev); ++ int r; ++ ++ if ((r = tsc2301_mixer_suspend(tsc)) < 0) ++ return r; ++ if ((r = tsc2301_kp_suspend(tsc)) < 0) ++ goto err1; ++ if ((r = tsc2301_ts_suspend(tsc)) < 0) ++ goto err2; ++ ++ return 0; ++err2: ++ tsc2301_kp_resume(tsc); ++err1: ++ tsc2301_mixer_resume(tsc); ++ return r; ++} ++ ++static int tsc2301_resume(struct spi_device *spi) ++{ ++ struct tsc2301 *tsc = dev_get_drvdata(&spi->dev); ++ ++ tsc2301_ts_resume(tsc); ++ tsc2301_kp_resume(tsc); ++ tsc2301_mixer_resume(tsc); ++ return 0; ++} ++#endif ++ ++static struct spi_driver tsc2301_driver = { ++ .driver = { ++ .name = "tsc2301", ++ .bus = &spi_bus_type, ++ .owner = THIS_MODULE, ++ }, ++#ifdef CONFIG_PM ++ .suspend = tsc2301_suspend, ++ .resume = tsc2301_resume, ++#endif ++ .probe = tsc2301_probe, ++ .remove = __devexit_p(tsc2301_remove), ++}; ++ ++static int __init tsc2301_init(void) ++{ ++ printk("TSC2301 driver initializing\n"); ++ ++ return spi_register_driver(&tsc2301_driver); ++} ++module_init(tsc2301_init); ++ ++static void __exit tsc2301_exit(void) ++{ ++ spi_unregister_driver(&tsc2301_driver); ++} ++module_exit(tsc2301_exit); ++ ++MODULE_AUTHOR("Juha Yrjölä <juha.yrjola@nokia.com>"); ++MODULE_LICENSE("GPL"); +Index: linux-3.1-rc4/drivers/spi/tsc2301-mixer.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-3.1-rc4/drivers/spi/tsc2301-mixer.c 2011-10-29 22:14:10.448812502 +0200 +@@ -0,0 +1,1003 @@ ++/* ++ * ALSA Mixer implementation for TSC2301 ++ * ++ * Copyright (C) 2006 Nokia Corporation. ++ * ++ * Contact: Jarkko Nikula <jarkko.nikula@nokia.com> ++ * Juha Yrjola ++ * ++ * Some notes about TSC2301: ++ * - PLL will stop when DAC and ADC's are powered down. ++ * - Touchscreen will stop working when audio part is powered up and if audio ++ * MCLK is stopped. Problem is avoided if audio is powered down before ++ * stopping MCLK. ++ * - Audio DAC or audio outputs will activate only after 100 msec from the ++ * chip power-up. Reason seems to be VCM since there is no this delay if the ++ * chip and VCM (bit AVPD on PD/MISC) were not powered down. The chip will ++ * consume about 1 mA if all other audio blocks are powered down except the ++ * chip itself and VCM. Full power down consumes only about few uA. ++ * - Power-down transition could happen earliest about 100 msec after the chip ++ * power-up. Otherwise power-down will fail if there is no that 100 msec ++ * on time before it. It's not obvious why is that since chip reports ++ * power-up to be completed and also PLL output on GPIO_0 is active in few ++ * milliseconds. ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * version 2 as published by the Free Software Foundation. ++ * ++ * 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., 51 Franklin St, Fifth Floor, Boston, MA ++ * 02110-1301 USA ++ * ++ */ ++ ++#include <linux/module.h> ++#include <linux/device.h> ++#include <linux/errno.h> ++#include <linux/delay.h> ++#include <linux/slab.h> ++#include <linux/spi/spi.h> ++#include <linux/spi/tsc2301.h> ++ ++#include <sound/core.h> ++#include <sound/control.h> ++ ++/* shadow register indexes */ ++enum { ++ /* audio control and volume registers */ ++ AUDCNTL_INDEX, ++ ADCVOL_INDEX, ++ DACVOL_INDEX, ++ BPVOL_INDEX, ++ /* keyclick control register (not needed here) */ ++ /* audio power control register */ ++ PD_MISC_INDEX, ++ /* TSC2301 GPIO control register */ ++ GPIO_INDEX, ++ ++ SHADOW_REG_COUNT, ++}; ++ ++/* structure for driver private data */ ++struct tsc2301_mixer { ++ struct tsc2301 *tsc; ++ struct mutex mutex; ++ ++ /* shadow registers holding TSC2301 audio registers. Used to hold ++ * their states during the sleep and also to reduce communication with ++ * the chip since get callback functions could get register values ++ * directly from these shadow registers without needing to read them ++ * from the chip */ ++ u16 shadow_regs[SHADOW_REG_COUNT]; ++ ++ /* audio controller driver usage of the ADC and DAC */ ++ unsigned adc_enabled:1, dac_enabled:1; ++ unsigned pll_output:1; ++ unsigned mclk_enabled; ++ ++ /* latest audio power-up timestamp */ ++ unsigned long pu_jiffies; ++ ++ /* these are used when upper layer(s) are going to power-down TSC2301 ++ * before 100 msec is passed from power-up */ ++ struct delayed_work delayed_power_down; ++ unsigned delayed_pd_active:1; ++ ++ int (* platform_init)(struct device *); ++ void (* platform_cleanup)(struct device *); ++ ++ struct tsc2301_mixer_gpio *mixer_gpios; ++ int n_mixer_gpios; ++}; ++ ++#define TSC2301_DAC_DELAY msecs_to_jiffies(100) ++#define TSC2301_MIN_PU_PERIOD msecs_to_jiffies(100) ++ ++#define TSC2301_REG_TO_PVAL(reg) \ ++ (TSC2301_REG_TO_PAGE(reg) << 6 | TSC2301_REG_TO_ADDR(reg)) ++#define TSC2301_PVAL_TO_REG(v) \ ++ (TSC2301_REG((((v) >> 6) & 3),((v) & 0x1f))) ++ ++#define TSC2301_VOLUME_MASK 0x7f ++#define TSC2301_MIN_ADCVOL 6 ++#define TSC2301_MIN_DACVOL 0 ++#define TSC2301_MIN_BPVOL 31 ++#define TSC2301_MUTE_LEFT_SHIFT 15 ++#define TSC2301_VOL_LEFT_SHIFT 8 ++#define TSC2301_MUTE_RIGHT_SHIFT 7 ++#define TSC2301_VOL_RIGHT_SHIFT 0 ++ ++#define TSC2301_INM_MASK 3 ++#define TSC2301_INML_SHIFT 12 ++#define TSC2301_INMR_SHIFT 10 ++ ++#define TSC2301_MICG_MASK 3 ++#define TSC2301_MICG_MIN 1 /* values 0 & 1 both mean 0 dB */ ++#define TSC2301_MICG_SHIFT 8 ++ ++#define TSC2301_REG_AUDCNTL_MCLK(v) (((v) & 3) << 6) ++#define TSC2301_REG_AUDCNTL_I2SFS(v) (((v) & 0xf) << 2) ++#define TSC2301_REG_AUDCNTL_I2SFM(v) (((v) & 3) << 0) ++ ++#define TSC2301_SINGLE(xname, xindex, reg, shadow_index, shift, mask, min) \ ++{\ ++ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ ++ .name = xname, \ ++ .index = xindex, \ ++ .info = snd_tsc2301_info_single, \ ++ .get = snd_tsc2301_get_single, \ ++ .put = snd_tsc2301_put_single, \ ++ .private_value = TSC2301_REG_TO_PVAL(reg) | \ ++ (shadow_index << 8) | (shift << 16) | (mask << 24) | \ ++ (min << 28) \ ++} ++#define TSC2301_SINGLE_MINVAL(v) (((v) >> 28) & 15) ++#define TSC2301_SINGLE_SHIFT(v) (((v) >> 16) & 15) ++#define TSC2301_SINGLE_MASK(v) (((v) >> 24) & 15) ++ ++#define TSC2301_DOUBLE(xname, xindex, reg, shadow_index, ls, rs, mask, min) \ ++{\ ++ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ ++ .name = xname, \ ++ .index = xindex, \ ++ .info = snd_tsc2301_info_double, \ ++ .get = snd_tsc2301_get_double, \ ++ .put = snd_tsc2301_put_double, \ ++ .private_value = TSC2301_REG_TO_PVAL(reg) | \ ++ (shadow_index << 8) | (min << 11) | \ ++ (ls << 16) | (rs << 20) | (mask << 24) \ ++} ++#define TSC2301_DOUBLE_MINVAL(v) (((v) >> 11) & 0x1f) ++#define TSC2301_DOUBLE_LEFT_SHIFT(v) (((v) >> 16) & 15) ++#define TSC2301_DOUBLE_RIGHT_SHIFT(v) (((v) >> 20) & 15) ++#define TSC2301_DOUBLE_MASK(v) (((v) >> 24) & TSC2301_VOLUME_MASK) ++ ++#define TSC2301_MUX(xname, xindex, reg, shadow_index, ls, rs, mask) \ ++{\ ++ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ ++ .name = xname, \ ++ .index = xindex, \ ++ .info = snd_tsc2301_info_mux, \ ++ .get = snd_tsc2301_get_mux, \ ++ .put = snd_tsc2301_put_mux, \ ++ .private_value = TSC2301_REG_TO_PVAL(reg) | \ ++ (shadow_index << 8) | (ls << 16) | (rs << 20) | (mask << 24) \ ++} ++#define TSC2301_MUX_LEFT_SHIFT(v) (((v) >> 16) & 15) ++#define TSC2301_MUX_RIGHT_SHIFT(v) (((v) >> 20) & 15) ++#define TSC2301_MUX_MASK(v) (((v) >> 24) & TSC2301_VOLUME_MASK) ++ ++#define TSC2301_BOOL(xname, xindex, reg, shadow_index, shift, invert, state) \ ++{ \ ++ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ ++ .name = xname, \ ++ .index = xindex, \ ++ .info = snd_tsc2301_info_bool, \ ++ .get = snd_tsc2301_get_bool, \ ++ .put = snd_tsc2301_put_bool, \ ++ .private_value = TSC2301_REG_TO_PVAL(reg) | \ ++ (shadow_index << 8) | (shift << 16) | \ ++ (invert << 24) | (state << 25) \ ++} ++#define TSC2301_BOOL_SHIFT(v) (((v) >> 16) & 7) ++#define TSC2301_BOOL_INVERT(v) (((v) >> 24) & 1) ++#define TSC2301_BOOL_STATE(v) (((v) >> 25) & 1) ++ ++#define TSC2301_SHADOW_INDEX(v) (((v) >> 8) & 7) ++ ++/* ++ * Power-down handler for additional GPIO mixer controls. GPIO state of GPIO ++ * controls whose power-down flag is enabled are set to their false/deactivate ++ * state ++ * ++ * Must be called tsc->mixer->mutex locked ++ */ ++static void tsc2301_gpio_power_down(struct tsc2301 *tsc) ++{ ++ struct tsc2301_mixer *mix = tsc->mixer; ++ u16 temp; ++ int i; ++ ++ temp = mix->shadow_regs[GPIO_INDEX]; ++ for (i = 0; i < mix->n_mixer_gpios; i++) { ++ const struct tsc2301_mixer_gpio *mg; ++ ++ mg = mix->mixer_gpios + i; ++ if (mg->deactivate_on_pd) { ++ int gpio = mg->gpio; ++ ++ temp &= ~(1 << gpio); ++ temp |= mg->inverted << gpio; ++ } ++ } ++ tsc2301_write_reg(tsc, TSC2301_REG_GPIO, temp); ++} ++ ++/* ++ * Powers down/up audio blocks which are muted or become unused. ++ * shadow_index >= 0, changes power state of single audio block ++ * shadow_index < 0, changes power state of all blocks ++ * ++ * Must be called tsc->mixer->mutex locked ++ */ ++#define TSC2301_MUTE_MASK \ ++ ((1 << TSC2301_MUTE_LEFT_SHIFT) | (1 << TSC2301_MUTE_RIGHT_SHIFT)) ++static void tsc2301_power_ctrl(struct tsc2301 *tsc, int shadow_index, ++ int poll_pdsts) ++{ ++ struct tsc2301_mixer *mix = tsc->mixer; ++ u16 pd_ctrl, pd_ctrl_old, w; ++ unsigned long timeout; ++ int power_up = 0; ++ ++ if (mix->delayed_pd_active) { ++ mix->delayed_pd_active = 0; ++ mix->mclk_enabled--; ++ cancel_delayed_work(&mix->delayed_power_down); ++ } ++ ++ pd_ctrl = pd_ctrl_old = mix->shadow_regs[PD_MISC_INDEX]; ++ /* power control helper based on used space mixer selections. See ++ * actual power control decisions below */ ++ if (shadow_index < 0 || shadow_index == ADCVOL_INDEX) { ++ /* ADC left and right power down control */ ++ if (mix->shadow_regs[ADCVOL_INDEX] & ++ (1 << TSC2301_MUTE_LEFT_SHIFT)) ++ /* left ADC muted. Power down the left ADC */ ++ pd_ctrl |= TSC2301_REG_PD_MISC_ADPDL; ++ else ++ pd_ctrl &= ~TSC2301_REG_PD_MISC_ADPDL; ++ if (mix->shadow_regs[ADCVOL_INDEX] & ++ (1 << TSC2301_MUTE_LEFT_SHIFT)) ++ /* right ADC muted. Power down the right ADC */ ++ pd_ctrl |= TSC2301_REG_PD_MISC_ADPDR; ++ else ++ pd_ctrl &= ~TSC2301_REG_PD_MISC_ADPDR; ++ } ++ if (shadow_index < 0 || shadow_index == DACVOL_INDEX) { ++ /* DAC power down control */ ++ if ((mix->shadow_regs[DACVOL_INDEX] & ++ TSC2301_MUTE_MASK) == TSC2301_MUTE_MASK) ++ /* both DACs muted. Power down the DAC */ ++ pd_ctrl |= TSC2301_REG_PD_MISC_DAPD; ++ else ++ pd_ctrl &= ~TSC2301_REG_PD_MISC_DAPD; ++ } ++ if (shadow_index < 0 || shadow_index == BPVOL_INDEX) { ++ /* line bypass power down control */ ++ if ((mix->shadow_regs[BPVOL_INDEX] & ++ TSC2301_MUTE_MASK) == TSC2301_MUTE_MASK) ++ /* both line bypasses muted. Power down the bypass ++ * path */ ++ pd_ctrl |= TSC2301_REG_PD_MISC_ABPD; ++ else ++ pd_ctrl &= ~TSC2301_REG_PD_MISC_ABPD; ++ } ++ if (shadow_index < 0 || shadow_index == AUDCNTL_INDEX) { ++ /* mic bias power down control */ ++ if ((mix->shadow_regs[AUDCNTL_INDEX] & ++ (3 << TSC2301_INML_SHIFT)) && ++ (mix->shadow_regs[AUDCNTL_INDEX] & ++ (3 << TSC2301_INMR_SHIFT))) ++ /* both ADC channels use other than mic input. Power ++ * down the mic bias output */ ++ pd_ctrl |= TSC2301_REG_PD_MISC_MIBPD; ++ else ++ pd_ctrl &= ~TSC2301_REG_PD_MISC_MIBPD; ++ } ++ ++ /* power control decisions based on codec usage and user space mixer ++ * selections detected above */ ++ pd_ctrl &= ~TSC2301_REG_PD_MISC_APD; /* audio not powered down */ ++ if (mix->mclk_enabled) { ++ if (!mix->adc_enabled) { ++ /* ADC not used, power down both ADC's and mic bias ++ * output independently of user space mixer ++ * selections */ ++ pd_ctrl |= TSC2301_REG_PD_MISC_ADPDL; ++ pd_ctrl |= TSC2301_REG_PD_MISC_ADPDR; ++ pd_ctrl |= TSC2301_REG_PD_MISC_MIBPD; ++ } ++ if (!mix->dac_enabled) { ++ /* DAC not used, power down DAC independently of user ++ * space mixer selections */ ++ pd_ctrl |= TSC2301_REG_PD_MISC_DAPD; ++ } ++ ++ if (mix->pll_output) { ++ /* GPIO_0 is configured as PLL output so audio ++ * controller is expecting clock from TSC2301. Either ++ * ADC or DAC must be active in order to keep PLL on */ ++ if ((pd_ctrl & TSC2301_REG_PD_MISC_ADPDL) && ++ (pd_ctrl & TSC2301_REG_PD_MISC_ADPDR) && ++ (pd_ctrl & TSC2301_REG_PD_MISC_DAPD)) { ++ /* neither ADC or DAC used. Force ADC on in ++ * order to keep PLL active */ ++ pd_ctrl &= ~(TSC2301_REG_PD_MISC_ADPDL | ++ TSC2301_REG_PD_MISC_ADPDR); ++ } ++ } ++ } else { ++ /* audio input clock is not enabled so power down DAC and ADC ++ * in order to shutdown PLL and to keep touchscreen and keypad ++ * parts working. Touchscreen and keypad use audio clock when ++ * PLL is on and internal clock otherwise */ ++ pd_ctrl |= TSC2301_REG_PD_MISC_DAPD | ++ TSC2301_REG_PD_MISC_ADPDL | ++ TSC2301_REG_PD_MISC_ADPDR; ++ } ++ ++ if ((pd_ctrl & TSC2301_REG_PD_MISC_ADPDL) && ++ (pd_ctrl & TSC2301_REG_PD_MISC_ADPDR) && ++ (pd_ctrl & TSC2301_REG_PD_MISC_DAPD) && ++ (pd_ctrl & TSC2301_REG_PD_MISC_ABPD)) { ++ /* all ADC, DAC and line bypass path unused. Power down the ++ * whole audio part of the TSC2301 */ ++ pd_ctrl |= TSC2301_REG_PD_MISC_APD; ++ } ++ ++ if (pd_ctrl == pd_ctrl_old) ++ return; ++ ++ /* power down control changed. Update into TSC2301 */ ++ if ((pd_ctrl ^ pd_ctrl_old) & TSC2301_REG_PD_MISC_APD) { ++ /* whole audio power state changed. Update GPIO states */ ++ if (pd_ctrl & TSC2301_REG_PD_MISC_APD) { ++ /* power down GPIO controls before powering down ++ * the codec */ ++ tsc2301_gpio_power_down(tsc); ++ /* we must really ensure that codec has been on no less ++ * than 100 msec before doing power-down */ ++ timeout = mix->pu_jiffies + TSC2301_MIN_PU_PERIOD - ++ jiffies; ++ if (timeout <= TSC2301_MIN_PU_PERIOD) { ++ mix->delayed_pd_active = 1; ++ mix->mclk_enabled++; ++ schedule_delayed_work(&mix->delayed_power_down, ++ timeout + 1); ++ return; ++ } ++ } else ++ /* restore GPIOs after codec is powered up */ ++ power_up = 1; ++ } ++ mix->shadow_regs[PD_MISC_INDEX] = pd_ctrl; ++ tsc2301_write_reg(tsc, TSC2301_REG_PD_MISC, pd_ctrl); ++ if (power_up) ++ mix->pu_jiffies = jiffies; ++ if (!poll_pdsts) { ++ if (power_up) ++ tsc2301_write_reg(tsc, TSC2301_REG_GPIO, ++ mix->shadow_regs[GPIO_INDEX]); ++ return; ++ } ++ ++ /* wait until power-up/-down is completed */ ++ timeout = jiffies + msecs_to_jiffies(100); ++ w = 0; ++ do { ++ if (time_after(jiffies, timeout)) { ++ /* Print a warning only if the I2S clock is not ++ * present / out of sync. This can happen during ++ * init time, when that clock will be turned on ++ * by another driver like in the OMAP EAC with ++ * external clock case. ++ */ ++ if (w & TSC2301_REG_PD_MISC_OTSYN) { ++ dev_warn(&tsc->spi->dev, ++ "I2S clock not in sync or off.\n"); ++ } else { ++ dev_err(&tsc->spi->dev, ++ "power-up/-down timed out " ++ "(0x%04x, 0x%04x -> 0x%04x)\n", ++ w, pd_ctrl_old, pd_ctrl); ++ } ++ goto out; ++ } ++ w = tsc2301_read_reg(tsc, TSC2301_REG_PD_MISC); ++ } while (!(w & TSC2301_REG_PD_MISC_PDSTS)); ++ ++out: ++ if (((pd_ctrl ^ pd_ctrl_old) & TSC2301_REG_PD_MISC_DAPD) && ++ !(pd_ctrl & TSC2301_REG_PD_MISC_DAPD)) { ++ /* DAC powered up now. Ensure that DAC and audio outputs are ++ * activated. They are up 100 msec after the chip power-up ++ * command */ ++ timeout = mix->pu_jiffies + TSC2301_DAC_DELAY - jiffies; ++ if (timeout <= TSC2301_DAC_DELAY) ++ schedule_timeout_interruptible(timeout); ++ /* FIXME: This is lazy. We restore GPIOs only after activating ++ * the DAC. It would be better to do some kind of delayed GPIO ++ * restore. That ensures that we restore them also if only ADC ++ * path is activated. But this is required only if there is ++ * some input amplifier, bias control, etc. and their power ++ * state is under TSC GPIO control */ ++ tsc2301_write_reg(tsc, TSC2301_REG_GPIO, ++ mix->shadow_regs[GPIO_INDEX]); ++ } ++} ++ ++static int snd_tsc2301_info_single(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_info *uinfo) ++{ ++ int mask = TSC2301_SINGLE_MASK(kcontrol->private_value); ++ int minval = TSC2301_SINGLE_MINVAL(kcontrol->private_value); ++ ++ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; ++ uinfo->count = 1; ++ uinfo->value.integer.min = minval; ++ uinfo->value.integer.max = mask; ++ ++ return 0; ++} ++ ++static int snd_tsc2301_get_single(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_value *ucontrol) ++{ ++ struct tsc2301 *tsc = kcontrol->private_data; ++ unsigned long priv = kcontrol->private_value; ++ int mask = TSC2301_SINGLE_MASK(priv); ++ int shift = TSC2301_SINGLE_SHIFT(priv); ++ int shadow_index = TSC2301_SHADOW_INDEX(priv); ++ u16 shadow_reg; ++ ++ shadow_reg = tsc->mixer->shadow_regs[shadow_index]; ++ ++ ucontrol->value.integer.value[0] = (shadow_reg >> shift) & mask; ++ ++ return 0; ++} ++ ++static int snd_tsc2301_put_single(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_value *ucontrol) ++{ ++ struct tsc2301 *tsc = kcontrol->private_data; ++ unsigned long priv = kcontrol->private_value; ++ int mask = TSC2301_SINGLE_MASK(priv); ++ int shadow_index = TSC2301_SHADOW_INDEX(priv); ++ u16 shadow_reg, shadow_reg_old; ++ int shift = TSC2301_SINGLE_SHIFT(priv); ++ int reg = TSC2301_PVAL_TO_REG(priv); ++ int changed; ++ ++ mutex_lock(&tsc->mixer->mutex); ++ shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index]; ++ ++ /* zero bits to be modified */ ++ shadow_reg &= ~(mask << shift); ++ /* modify with new value */ ++ shadow_reg |= ((ucontrol->value.integer.value[0] & mask) << shift); ++ ++ changed = (shadow_reg != shadow_reg_old); ++ tsc->mixer->shadow_regs[shadow_index] = shadow_reg; ++ ++ /* update into TSC2301 if necessary */ ++ if (changed) ++ tsc2301_write_reg(tsc, reg, shadow_reg); ++ mutex_unlock(&tsc->mixer->mutex); ++ ++ return changed; ++} ++ ++static int snd_tsc2301_info_double(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_info *uinfo) ++{ ++ /* mask == 1 : Switch ++ * mask > 1 : Max volume */ ++ int mask = TSC2301_DOUBLE_MASK(kcontrol->private_value); ++ int minval = TSC2301_DOUBLE_MINVAL(kcontrol->private_value); ++ ++ uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : ++ SNDRV_CTL_ELEM_TYPE_INTEGER; ++ uinfo->count = 2; ++ uinfo->value.integer.min = minval; ++ uinfo->value.integer.max = mask; ++ ++ return 0; ++} ++ ++static int snd_tsc2301_get_double(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_value *ucontrol) ++{ ++ struct tsc2301 *tsc = kcontrol->private_data; ++ unsigned long priv = kcontrol->private_value; ++ /* mask == 1 : Switch ++ * mask > 1 : Volume */ ++ int mask = TSC2301_DOUBLE_MASK(priv); ++ int ls = TSC2301_DOUBLE_LEFT_SHIFT(priv); ++ int rs = TSC2301_DOUBLE_RIGHT_SHIFT(priv); ++ int shadow_index = TSC2301_SHADOW_INDEX(priv); ++ u16 shadow_reg; ++ ++ shadow_reg = tsc->mixer->shadow_regs[shadow_index]; ++ ++ /* invert mute bits for the switches */ ++ if (mask == 1) ++ shadow_reg = ~shadow_reg; ++ ++ ucontrol->value.integer.value[0] = (shadow_reg >> ls) & mask; ++ ucontrol->value.integer.value[1] = (shadow_reg >> rs) & mask; ++ ++ return 0; ++} ++ ++static int snd_tsc2301_put_double(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_value *ucontrol) ++{ ++ struct tsc2301 *tsc = kcontrol->private_data; ++ unsigned long priv = kcontrol->private_value; ++ /* mask == 1 : Switch ++ * mask > 1 : Volume */ ++ int mask = TSC2301_DOUBLE_MASK(priv); ++ int shadow_index = TSC2301_SHADOW_INDEX(priv); ++ u16 shadow_reg, shadow_reg_old; ++ int ls = TSC2301_DOUBLE_LEFT_SHIFT(priv); ++ int rs = TSC2301_DOUBLE_RIGHT_SHIFT(priv); ++ int reg = TSC2301_PVAL_TO_REG(priv); ++ int changed; ++ ++ mutex_lock(&tsc->mixer->mutex); ++ shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index]; ++ ++ /* zero bits to be modified */ ++ shadow_reg &= ~((mask << ls) | (mask << rs)); ++ /* modify with new value */ ++ if (mask == 1) { ++ /* switch. Invert switch values for the mute bits */ ++ shadow_reg |= ++ ((~ucontrol->value.integer.value[0] & mask) << ls) | ++ ((~ucontrol->value.integer.value[1] & mask) << rs); ++ } else { ++ /* volume */ ++ shadow_reg |= ++ (ucontrol->value.integer.value[0] << ls) | ++ (ucontrol->value.integer.value[1] << rs); ++ } ++ ++ changed = (shadow_reg != shadow_reg_old); ++ tsc->mixer->shadow_regs[shadow_index] = shadow_reg; ++ ++ /* update into TSC2301 if necessary */ ++ if (changed) ++ tsc2301_write_reg(tsc, reg, shadow_reg); ++ ++ if (mask == 1) ++ /* check is need to power down/up audio blocks in case of ++ * muted state change */ ++ tsc2301_power_ctrl(tsc, shadow_index, 0); ++ mutex_unlock(&tsc->mixer->mutex); ++ ++ return changed; ++} ++ ++static int snd_tsc2301_info_mux(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_info *uinfo) ++{ ++ static char *texts[4] = {"Mic", "Line", "Line swapped", "Line mono"}; ++ ++ uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; ++ uinfo->count = 2; ++ uinfo->value.enumerated.items = 4; ++ if (uinfo->value.enumerated.item > 3) ++ uinfo->value.enumerated.item = 3; ++ strcpy(uinfo->value.enumerated.name, ++ texts[uinfo->value.enumerated.item]); ++ ++ return 0; ++} ++ ++static int snd_tsc2301_get_mux(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_value *ucontrol) ++{ ++ struct tsc2301 *tsc = kcontrol->private_data; ++ unsigned long priv = kcontrol->private_value; ++ int mask = TSC2301_MUX_MASK(priv); ++ int ls = TSC2301_MUX_LEFT_SHIFT(priv); ++ int rs = TSC2301_MUX_RIGHT_SHIFT(priv); ++ int shadow_index = TSC2301_SHADOW_INDEX(priv); ++ u16 shadow_reg; ++ ++ shadow_reg = tsc->mixer->shadow_regs[shadow_index]; ++ ucontrol->value.enumerated.item[0] = (shadow_reg >> ls) & mask; ++ ucontrol->value.enumerated.item[1] = (shadow_reg >> rs) & mask; ++ ++ return 0; ++} ++ ++static int snd_tsc2301_put_mux(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_value *ucontrol) ++{ ++ struct tsc2301 *tsc = kcontrol->private_data; ++ unsigned long priv = kcontrol->private_value; ++ int mask = TSC2301_MUX_MASK(priv); ++ int shadow_index = TSC2301_SHADOW_INDEX(priv); ++ u16 shadow_reg, shadow_reg_old; ++ int ls = TSC2301_MUX_LEFT_SHIFT(priv); ++ int rs = TSC2301_MUX_RIGHT_SHIFT(priv); ++ int reg = TSC2301_PVAL_TO_REG(priv); ++ int changed; ++ ++ mutex_lock(&tsc->mixer->mutex); ++ shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index]; ++ ++ /* zero bits to be modified */ ++ shadow_reg &= ~((mask << ls) | (mask << rs)); ++ /* modify with new value */ ++ shadow_reg |= (ucontrol->value.enumerated.item[0] << ls); ++ shadow_reg |= (ucontrol->value.enumerated.item[1] << rs); ++ ++ changed = (shadow_reg != shadow_reg_old); ++ ++ /* update into TSC2301 if necessary */ ++ if (changed) { ++ tsc->mixer->shadow_regs[shadow_index] = shadow_reg; ++ tsc2301_write_reg(tsc, reg, shadow_reg); ++ } ++ ++ /* check is need to power up/down audio blocks in case of ADC input ++ * change */ ++ tsc2301_power_ctrl(tsc, shadow_index, 0); ++ mutex_unlock(&tsc->mixer->mutex); ++ ++ return changed; ++} ++ ++static int snd_tsc2301_info_bool(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_info *uinfo) ++{ ++ uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; ++ uinfo->count = 1; ++ uinfo->value.integer.min = 0; ++ uinfo->value.integer.max = 1; ++ ++ return 0; ++} ++ ++static int snd_tsc2301_get_bool(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_value *ucontrol) ++{ ++ struct tsc2301 *tsc = kcontrol->private_data; ++ unsigned long priv = kcontrol->private_value; ++ int shadow_index = TSC2301_SHADOW_INDEX(priv); ++ int shift = TSC2301_BOOL_SHIFT(priv); ++ int invert = TSC2301_BOOL_INVERT(priv); ++ u16 shadow_reg; ++ ++ shadow_reg = tsc->mixer->shadow_regs[shadow_index]; ++ ucontrol->value.integer.value[0] = ++ invert ^ ((shadow_reg >> shift) & 1); ++ ++ return 0; ++} ++ ++static int snd_tsc2301_put_bool(struct snd_kcontrol *kcontrol, ++ struct snd_ctl_elem_value *ucontrol) ++{ ++ struct tsc2301 *tsc = kcontrol->private_data; ++ unsigned long priv = kcontrol->private_value; ++ int shadow_index = TSC2301_SHADOW_INDEX(priv); ++ int shift = TSC2301_BOOL_SHIFT(priv); ++ int invert = TSC2301_BOOL_INVERT(priv); ++ int reg = TSC2301_PVAL_TO_REG(priv); ++ u16 shadow_reg, shadow_reg_old; ++ int changed; ++ ++ mutex_lock(&tsc->mixer->mutex); ++ shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index]; ++ ++ /* zero bit to be modified */ ++ shadow_reg &= ~(1 << shift); ++ /* modify with new value */ ++ shadow_reg |= ++ (invert ^ (ucontrol->value.integer.value[0] & 1)) << shift; ++ ++ changed = (shadow_reg != shadow_reg_old); ++ ++ /* update into TSC2301 if necessary */ ++ if (changed) { ++ tsc->mixer->shadow_regs[shadow_index] = shadow_reg; ++ if ((shadow_index == GPIO_INDEX) && ++ (tsc->mixer->shadow_regs[PD_MISC_INDEX] & ++ TSC2301_REG_PD_MISC_APD)) { ++ /* changing GPIO control and audio is powered down. ++ * Update GPIO states according to their power-down ++ * flag */ ++ tsc2301_gpio_power_down(tsc); ++ } else ++ tsc2301_write_reg(tsc, reg, shadow_reg); ++ } ++ mutex_unlock(&tsc->mixer->mutex); ++ ++ return changed; ++} ++ ++/* TSC2301 internal mixer controls */ ++static struct snd_kcontrol_new snd_tsc2301_controls[] = { ++ /* stereo ADC input switches and volumes */ ++ TSC2301_DOUBLE("Capture Switch", 0, ++ TSC2301_REG_ADCVOL, ADCVOL_INDEX, ++ TSC2301_MUTE_LEFT_SHIFT, TSC2301_MUTE_RIGHT_SHIFT, ++ 1, 0), ++ TSC2301_DOUBLE("Capture Volume", 0, ++ TSC2301_REG_ADCVOL, ADCVOL_INDEX, ++ TSC2301_VOL_LEFT_SHIFT, TSC2301_VOL_RIGHT_SHIFT, ++ TSC2301_VOLUME_MASK, TSC2301_MIN_ADCVOL), ++ ++ /* stereo DAC output switches and volumes */ ++ TSC2301_DOUBLE("PCM Playback Switch", 0, ++ TSC2301_REG_DACVOL, DACVOL_INDEX, ++ TSC2301_MUTE_LEFT_SHIFT, TSC2301_MUTE_RIGHT_SHIFT, ++ 1, 0), ++ TSC2301_DOUBLE("PCM Playback Volume", 0, ++ TSC2301_REG_DACVOL, DACVOL_INDEX, ++ TSC2301_VOL_LEFT_SHIFT, TSC2301_VOL_RIGHT_SHIFT, ++ TSC2301_VOLUME_MASK, TSC2301_MIN_DACVOL), ++ ++ /* stereo line input bypass switches and volumes */ ++ TSC2301_DOUBLE("Line Playback Switch", 0, ++ TSC2301_REG_BPVOL, BPVOL_INDEX, ++ TSC2301_MUTE_LEFT_SHIFT, TSC2301_MUTE_RIGHT_SHIFT, ++ 1, 0), ++ TSC2301_DOUBLE("Line Playback Volume", 0, ++ TSC2301_REG_BPVOL, BPVOL_INDEX, ++ TSC2301_VOL_LEFT_SHIFT, TSC2301_VOL_RIGHT_SHIFT, ++ TSC2301_VOLUME_MASK, TSC2301_MIN_BPVOL), ++ ++ /* mono microphone input gain */ ++ TSC2301_SINGLE("Mic Boost", 0, ++ TSC2301_REG_AUDCNTL, AUDCNTL_INDEX, ++ TSC2301_MICG_SHIFT, ++ TSC2301_MICG_MASK, TSC2301_MICG_MIN), ++ ++ /* ADC input sources. Both channels could be selected separately */ ++ TSC2301_MUX("Capture Source", 0, ++ TSC2301_REG_AUDCNTL, AUDCNTL_INDEX, ++ TSC2301_INML_SHIFT, TSC2301_INMR_SHIFT, ++ TSC2301_INM_MASK), ++}; ++ ++/* must be called tsc->mixer->mutex locked */ ++static void tsc2301_flush_shadow_regs(struct tsc2301 *tsc) ++{ ++ int i, page, addr; ++ u16 temp; ++ ++ page = TSC2301_REG_TO_PAGE(TSC2301_REG_AUDCNTL); ++ addr = TSC2301_REG_TO_ADDR(TSC2301_REG_AUDCNTL); ++ ++ for (i = 0; i < 4; i++) { ++ temp = tsc->mixer->shadow_regs[i]; ++ tsc2301_write_reg(tsc, TSC2301_REG(page, addr + i), temp); ++ } ++ temp = tsc->mixer->shadow_regs[GPIO_INDEX]; ++ tsc2301_write_reg(tsc, TSC2301_REG_GPIO, temp); ++ ++ /* Update power state of all audio blocks depending are they ++ * muted or unused. */ ++ tsc2301_power_ctrl(tsc, -1, 0); ++} ++ ++#ifdef CONFIG_PM ++int tsc2301_mixer_suspend(struct tsc2301 *tsc) ++{ ++ /* power down entire audio section inside TSC2301 in case the ++ * chip is still powered during the system sleep. However this driver ++ * doesn't require that chip is powered because registers are restored ++ * in function tsc2301_mixer_resume */ ++ mutex_lock(&tsc->mixer->mutex); ++ tsc2301_gpio_power_down(tsc); ++ tsc->mixer->shadow_regs[PD_MISC_INDEX] |= TSC2301_REG_PD_MISC_APD; ++ tsc2301_write_reg(tsc, TSC2301_REG_PD_MISC, ++ tsc->mixer->shadow_regs[PD_MISC_INDEX]); ++ mutex_unlock(&tsc->mixer->mutex); ++ return 0; ++} ++ ++void tsc2301_mixer_resume(struct tsc2301 *tsc) ++{ ++ /* power up the TSC2301 audio section and restore registers */ ++ mutex_lock(&tsc->mixer->mutex); ++ tsc->mixer->shadow_regs[PD_MISC_INDEX] &= ~TSC2301_REG_PD_MISC_APD; ++ tsc2301_flush_shadow_regs(tsc); ++ mutex_unlock(&tsc->mixer->mutex); ++} ++#endif ++ ++void tsc2301_mixer_enable_mclk(struct device *dev) ++{ ++ struct tsc2301 *tsc = dev_get_drvdata(dev); ++ struct tsc2301_mixer *mix = tsc->mixer; ++ ++ mutex_lock(&mix->mutex); ++ if (!mix->mclk_enabled++ && tsc->enable_clock != NULL) { ++ tsc->enable_clock(dev); ++ } ++ tsc2301_power_ctrl(tsc, -1, 1); ++ mutex_unlock(&mix->mutex); ++} ++ ++void tsc2301_mixer_disable_mclk(struct device *dev) ++{ ++ struct tsc2301 *tsc = dev_get_drvdata(dev); ++ struct tsc2301_mixer *mix = tsc->mixer; ++ ++ mutex_lock(&mix->mutex); ++ mix->mclk_enabled--; ++ tsc2301_power_ctrl(tsc, -1, 1); ++ if (!mix->mclk_enabled && tsc->disable_clock != NULL) { ++ tsc->disable_clock(dev); ++ } ++ mutex_unlock(&mix->mutex); ++} ++ ++static void tsc2301_mixer_delayed_power_down(struct work_struct *work) ++{ ++ struct tsc2301_mixer *mix = container_of(work, struct tsc2301_mixer, ++ delayed_power_down.work); ++ struct tsc2301 *tsc = mix->tsc; ++ ++ mutex_lock(&mix->mutex); ++ if (!mix->delayed_pd_active) { ++ mutex_unlock(&mix->mutex); ++ return; ++ } ++ mix->delayed_pd_active = 0; ++ mutex_unlock(&mix->mutex); ++ tsc2301_mixer_disable_mclk(&tsc->spi->dev); ++} ++ ++/* ++ * Allows audio controller driver to notify its usage of ADC and DAC ++ */ ++void tsc2301_mixer_set_power(struct device *dev, int dac, int adc) ++{ ++ struct tsc2301 *tsc = dev_get_drvdata(dev); ++ ++ mutex_lock(&tsc->mixer->mutex); ++ tsc->mixer->adc_enabled = adc; ++ tsc->mixer->dac_enabled = dac; ++ ++ /* update power state of all audio blocks */ ++ tsc2301_power_ctrl(tsc, -1, 1); ++ mutex_unlock(&tsc->mixer->mutex); ++} ++ ++/* ++ * Registers TSC2301 ALSA Mixer controls for the given sound card ++ */ ++int tsc2301_mixer_register_controls(struct device *dev, struct snd_card *card) ++{ ++ struct tsc2301 *tsc = dev_get_drvdata(dev); ++ struct tsc2301_mixer *mix = tsc->mixer; ++ int i, err; ++ ++ /* Register ALSA mixer controls */ ++ for (i = 0; i < ARRAY_SIZE(snd_tsc2301_controls); i++) { ++ err = snd_ctl_add(card, ++ snd_ctl_new1(&snd_tsc2301_controls[i], tsc)); ++ if (err < 0) ++ return err; ++ } ++ ++ if (!mix->n_mixer_gpios) ++ return 0; ++ ++ /* Register additional GPIO controls if defined */ ++ for (i = 0; i < mix->n_mixer_gpios; i++) { ++ const struct tsc2301_mixer_gpio *mg = mix->mixer_gpios + i; ++ struct snd_kcontrol *ctrlp; ++ struct snd_kcontrol_new ctrl = ++ TSC2301_BOOL((char *)mg->name, 0, ++ TSC2301_REG_GPIO, GPIO_INDEX, ++ mg->gpio, mg->inverted, mg->def_enable); ++ ++ ctrlp = snd_ctl_new1(&ctrl, tsc); ++ err = snd_ctl_add(card, ctrlp); ++ if (err < 0) ++ return err; ++ } ++ ++ return 0; ++} ++ ++int tsc2301_mixer_init(struct tsc2301 *tsc, ++ struct tsc2301_platform_data *pdata) ++{ ++ struct tsc2301_mixer *mix; ++ int err = 0; ++ u16 w; ++ ++ mix = kzalloc(sizeof(*mix), GFP_KERNEL); ++ if (mix == NULL) ++ return -ENOMEM; ++ tsc->mixer = mix; ++ ++ mix->tsc = tsc; ++ mutex_init(&mix->mutex); ++ mix->platform_init = pdata->codec_init; ++ mix->platform_cleanup = pdata->codec_cleanup; ++ mix->pll_output = pdata->pll_output; ++ ++ INIT_DELAYED_WORK(&mix->delayed_power_down, ++ tsc2301_mixer_delayed_power_down); ++ ++ /* initialize shadow register default values */ ++ w = 0xc000; ++ w |= (pdata->mclk_ratio << 6) | (pdata->i2s_sample_rate << 2); ++ w |= pdata->i2s_format; ++ mix->shadow_regs[AUDCNTL_INDEX] = w; ++ mix->shadow_regs[ADCVOL_INDEX] = 0xd7d7; ++ mix->shadow_regs[DACVOL_INDEX] = 0xffff; ++ mix->shadow_regs[BPVOL_INDEX] = 0xe7e7; ++ mix->shadow_regs[PD_MISC_INDEX] = pdata->power_down_blocks; ++ ++ /* if extra mixer controls configured, then configure associated ++ * GPIOs as output and drive their default state */ ++ if (pdata->n_mixer_gpios) { ++ int i; ++ ++ w = 0; ++ for (i = 0; i < pdata->n_mixer_gpios; i++) { ++ const struct tsc2301_mixer_gpio *mg; ++ int gpio; ++ ++ mg = pdata->mixer_gpios + i; ++ gpio = mg->gpio; ++ w |= (1 << gpio) << 8; ++ w |= (mg->inverted ^ mg->def_enable) << gpio; ++ } ++ mix->shadow_regs[GPIO_INDEX] = w; ++ ++ mix->mixer_gpios = kmalloc(sizeof(*pdata->mixer_gpios) * ++ pdata->n_mixer_gpios, ++ GFP_KERNEL); ++ if (mix->mixer_gpios == NULL) { ++ err = -ENOMEM; ++ goto err1; ++ } ++ memcpy(mix->mixer_gpios, pdata->mixer_gpios, ++ sizeof(*pdata->mixer_gpios) * pdata->n_mixer_gpios); ++ mix->n_mixer_gpios = pdata->n_mixer_gpios; ++ } ++ ++ /* PLL control */ ++ tsc2301_write_pll(tsc, pdata->pll_n, pdata->pll_a, pdata->pll_pdc, ++ 0, mix->pll_output ? 0 : 1); ++ ++ tsc2301_flush_shadow_regs(tsc); ++ ++ if (mix->platform_init != NULL) { ++ err = mix->platform_init(&tsc->spi->dev); ++ if (err < 0) ++ goto err2; ++ } ++ ++ return 0; ++err2: ++ if (mix->mixer_gpios != NULL) ++ kfree(mix->mixer_gpios); ++err1: ++ kfree(mix); ++ return err; ++} ++ ++void tsc2301_mixer_exit(struct tsc2301 *tsc) ++{ ++ struct tsc2301_mixer *mixer = tsc->mixer; ++ ++ if (mixer->platform_cleanup != NULL) ++ mixer->platform_cleanup(&tsc->spi->dev); ++ ++ if (mixer->mixer_gpios != NULL) ++ kfree(mixer->mixer_gpios); ++} ++ ++MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@nokia.com>"); ++MODULE_LICENSE("GPL"); +Index: linux-3.1-rc4/include/linux/spi/tsc2301.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-3.1-rc4/include/linux/spi/tsc2301.h 2011-10-29 22:14:10.448812502 +0200 +@@ -0,0 +1,208 @@ ++#ifndef _LINUX_SPI_TSC2301_H ++#define _LINUX_SPI_TSC2301_H ++ ++#include <linux/types.h> ++#include <linux/timer.h> ++ ++struct tsc2301_platform_data { ++ /* ++ * Keypad ++ */ ++ s16 reset_gpio; ++ s16 keyb_int; ++ s16 keymap[16]; /* Set a key to a negative value if not used */ ++ unsigned kp_rep:1; /* Enable keypad repeating */ ++ char *keyb_name; /* Keyboard device name */ ++ ++ /* ++ * Touchscreen ++ */ ++ s16 dav_int; ++ u16 ts_x_plate_ohm; ++ u32 ts_stab_time; /* voltage settling time */ ++ u8 ts_hw_avg; /* HW assiseted averaging. Can be ++ 0, 4, 8, 16 samples per reading */ ++ u32 ts_max_pressure;/* Samples with bigger pressure value will ++ be ignored, since the corresponding X, Y ++ values are unreliable */ ++ u32 ts_touch_pressure; /* Pressure limit until we report a ++ touch event. After that we switch ++ to ts_max_pressure. */ ++ u32 ts_pressure_fudge; ++ u32 ts_x_max; ++ u32 ts_x_fudge; ++ u32 ts_y_max; ++ u32 ts_y_fudge; ++ ++ /* ++ * Audio ++ */ ++ unsigned pll_pdc:4; ++ unsigned pll_a:4; ++ unsigned pll_n:4; ++ unsigned pll_output:1; /* Output PLL on GPIO_0 */ ++ ++ unsigned mclk_ratio:2; ++ unsigned i2s_sample_rate:4; ++ unsigned i2s_format:2; ++ /* Mask for audio blocks to be powered down */ ++ u16 power_down_blocks; ++ ++ /* Called after codec has been initialized, can be NULL */ ++ int (* codec_init)(struct device *tsc2301_dev); ++ /* Called when codec is being removed, can be NULL */ ++ void (* codec_cleanup)(struct device *tsc2301_dev); ++ int (*enable_clock)(struct device *dev); ++ void (*disable_clock)(struct device *dev); ++ ++ const struct tsc2301_mixer_gpio { ++ const char *name; ++ unsigned gpio:4; ++ unsigned inverted:1; ++ unsigned def_enable:1; /* enable by default */ ++ unsigned deactivate_on_pd:1; /* power-down flag */ ++ } *mixer_gpios; ++ int n_mixer_gpios; ++}; ++ ++struct tsc2301_kp; ++struct tsc2301_ts; ++struct tsc2301_mixer; ++ ++struct tsc2301 { ++ struct spi_device *spi; ++ ++ s16 reset_gpio; ++ u16 config2_shadow; ++ ++ struct tsc2301_kp *kp; ++ struct tsc2301_ts *ts; ++ struct tsc2301_mixer *mixer; ++ ++ int (*enable_clock)(struct device *dev); ++ void (*disable_clock)(struct device *dev); ++}; ++ ++ ++#define TSC2301_HZ 33000000 ++ ++#define TSC2301_REG(page, addr) (((page) << 11) | ((addr) << 5)) ++#define TSC2301_REG_TO_PAGE(reg) (((reg) >> 11) & 0x03) ++#define TSC2301_REG_TO_ADDR(reg) (((reg) >> 5) & 0x1f) ++ ++#define TSC2301_REG_X TSC2301_REG(0, 0) ++#define TSC2301_REG_Y TSC2301_REG(0, 1) ++#define TSC2301_REG_Z1 TSC2301_REG(0, 2) ++#define TSC2301_REG_Z2 TSC2301_REG(0, 3) ++#define TSC2301_REG_KPDATA TSC2301_REG(0, 4) ++#define TSC2301_REG_ADC TSC2301_REG(1, 0) ++#define TSC2301_REG_KEY TSC2301_REG(1, 1) ++#define TSC2301_REG_DAC TSC2301_REG(1, 2) ++#define TSC2301_REG_REF TSC2301_REG(1, 3) ++#define TSC2301_REG_RESET TSC2301_REG(1, 4) ++#define TSC2301_REG_CONFIG TSC2301_REG(1, 5) ++#define TSC2301_REG_CONFIG2 TSC2301_REG(1, 6) ++#define TSC2301_REG_KPMASK TSC2301_REG(1, 16) ++#define TSC2301_REG_AUDCNTL TSC2301_REG(2, 0) ++#define TSC2301_REG_ADCVOL TSC2301_REG(2, 1) ++#define TSC2301_REG_DACVOL TSC2301_REG(2, 2) ++#define TSC2301_REG_BPVOL TSC2301_REG(2, 3) ++#define TSC2301_REG_KEYCTL TSC2301_REG(2, 4) ++#define TSC2301_REG_PD_MISC TSC2301_REG(2, 5) ++#define TSC2301_REG_GPIO TSC2301_REG(2, 6) ++#define TSC2301_REG_ADCLKCFG TSC2301_REG(2, 27) ++ ++#define TSC2301_REG_PD_MISC_APD (1 << 15) ++#define TSC2301_REG_PD_MISC_AVPD (1 << 14) ++#define TSC2301_REG_PD_MISC_ABPD (1 << 13) ++#define TSC2301_REG_PD_MISC_HAPD (1 << 12) ++#define TSC2301_REG_PD_MISC_MOPD (1 << 11) ++#define TSC2301_REG_PD_MISC_DAPD (1 << 10) ++#define TSC2301_REG_PD_MISC_ADPDL (1 << 9) ++#define TSC2301_REG_PD_MISC_ADPDR (1 << 8) ++#define TSC2301_REG_PD_MISC_PDSTS (1 << 7) ++#define TSC2301_REG_PD_MISC_MIBPD (1 << 6) ++#define TSC2301_REG_PD_MISC_OTSYN (1 << 2) ++ ++/* I2S sample rate */ ++#define TSC2301_I2S_SR_48000 0x00 ++#define TSC2301_I2S_SR_44100 0x01 ++#define TSC2301_I2S_SR_32000 0x02 ++#define TSC2301_I2S_SR_24000 0x03 ++#define TSC2301_I2S_SR_22050 0x04 ++#define TSC2301_I2S_SR_16000 0x05 ++#define TSC2301_I2S_SR_12000 0x06 ++#define TSC2301_I2S_SR_11050 0x07 ++#define TSC2301_I2S_SR_8000 0x08 ++ ++/* 16-bit, MSB-first. DAC Right-Justified, ADC Left-Justified */ ++#define TSC2301_I2S_FORMAT0 0x00 ++/* 20-bit, MSB-first. DAC Right-Justified, ADC Left-Justified */ ++#define TSC2301_I2S_FORMAT1 0x01 ++/* 20-bit, MSB-first. DAC Left-Justified, ADC Left-Justified */ ++#define TSC2301_I2S_FORMAT2 0x02 ++/* 20-bit, MSB-first */ ++#define TSC2301_I2S_FORMAT3 0x03 ++ ++/* Master Clock Ratio */ ++#define TSC2301_MCLK_256xFS 0x00 /* default */ ++#define TSC2301_MCLK_384xFS 0x01 ++#define TSC2301_MCLK_512xFS 0x02 ++ ++ ++extern u16 tsc2301_read_reg(struct tsc2301 *tsc, int reg); ++extern void tsc2301_write_reg(struct tsc2301 *tsc, int reg, u16 val); ++extern void tsc2301_write_kbc(struct tsc2301 *tsc, int val); ++extern void tsc2301_write_pll(struct tsc2301 *tsc, int pll_n, int pll_a, ++ int pll_pdc, int pct_e, int pll_o); ++extern void tsc2301_read_buf(struct tsc2301 *tsc, int reg, u16 *buf, int len); ++ ++#define TSC2301_DECL_MOD(module) \ ++extern int tsc2301_##module##_init(struct tsc2301 *tsc, \ ++ struct tsc2301_platform_data *pdata); \ ++extern void tsc2301_##module##_exit(struct tsc2301 *tsc); \ ++extern int tsc2301_##module##_suspend(struct tsc2301 *tsc); \ ++extern void tsc2301_##module##_resume(struct tsc2301 *tsc); ++ ++#define TSC2301_DECL_EMPTY_MOD(module) \ ++static inline int tsc2301_##module##_init(struct tsc2301 *tsc, \ ++ struct tsc2301_platform_data *pdata) \ ++{ \ ++ return 0; \ ++} \ ++static inline void tsc2301_##module##_exit(struct tsc2301 *tsc) {} \ ++static inline int tsc2301_##module##_suspend(struct tsc2301 *tsc) \ ++{ \ ++ return 0; \ ++} \ ++static inline void tsc2301_##module##_resume(struct tsc2301 *tsc) {} ++ ++#ifdef CONFIG_KEYBOARD_TSC2301 ++TSC2301_DECL_MOD(kp) ++void tsc2301_kp_restart(struct tsc2301 *tsc); ++#else ++TSC2301_DECL_EMPTY_MOD(kp) ++static inline void tsc2301_kp_restart(struct tsc2301 *tsc) {} ++#endif ++ ++#ifdef CONFIG_TOUCHSCREEN_TSC2301 ++TSC2301_DECL_MOD(ts) ++#else ++TSC2301_DECL_EMPTY_MOD(ts) ++#endif ++ ++#ifdef CONFIG_SPI_TSC2301_AUDIO ++TSC2301_DECL_MOD(mixer) ++extern void tsc2301_mixer_set_power(struct device *tsc_dev, int dac, int adc); ++ ++struct snd_card; ++extern int tsc2301_mixer_register_controls(struct device *tsc_dev, ++ struct snd_card *card); ++#else ++TSC2301_DECL_EMPTY_MOD(mixer) ++#endif ++ ++extern void tsc2301_mixer_enable_mclk(struct device *tsc_dev); ++extern void tsc2301_mixer_disable_mclk(struct device *tsc_dev); ++ ++#endif |