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author | Felix Fietkau <nbd@openwrt.org> | 2016-03-07 17:56:53 +0000 |
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committer | Felix Fietkau <nbd@openwrt.org> | 2016-03-07 17:56:53 +0000 |
commit | 1e91df0491af50d6bb3872bf1951e47c31694f3d (patch) | |
tree | feb1e217b182e8c5b30d910a506e4b9f07f7e780 /target/linux/ramips/patches-4.3/0044-i2c-MIPS-adds-ralink-I2C-driver.patch | |
parent | 95cd00b31eea8f61158c2b2f05698688321a0ccd (diff) | |
download | master-187ad058-1e91df0491af50d6bb3872bf1951e47c31694f3d.tar.gz master-187ad058-1e91df0491af50d6bb3872bf1951e47c31694f3d.tar.bz2 master-187ad058-1e91df0491af50d6bb3872bf1951e47c31694f3d.zip |
ramips: convert the remaining subtargets to 4.4
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@48954 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ramips/patches-4.3/0044-i2c-MIPS-adds-ralink-I2C-driver.patch')
-rw-r--r-- | target/linux/ramips/patches-4.3/0044-i2c-MIPS-adds-ralink-I2C-driver.patch | 398 |
1 files changed, 0 insertions, 398 deletions
diff --git a/target/linux/ramips/patches-4.3/0044-i2c-MIPS-adds-ralink-I2C-driver.patch b/target/linux/ramips/patches-4.3/0044-i2c-MIPS-adds-ralink-I2C-driver.patch deleted file mode 100644 index 30108fb6d9..0000000000 --- a/target/linux/ramips/patches-4.3/0044-i2c-MIPS-adds-ralink-I2C-driver.patch +++ /dev/null @@ -1,398 +0,0 @@ -From 723b8beaabf3c3c4b1ce69480141f1e926f3f3b2 Mon Sep 17 00:00:00 2001 -From: John Crispin <blogic@openwrt.org> -Date: Sun, 27 Jul 2014 09:52:56 +0100 -Subject: [PATCH 44/53] i2c: MIPS: adds ralink I2C driver - -Signed-off-by: John Crispin <blogic@openwrt.org> ---- - .../devicetree/bindings/i2c/i2c-ralink.txt | 27 ++ - drivers/i2c/busses/Kconfig | 4 + - drivers/i2c/busses/Makefile | 1 + - drivers/i2c/busses/i2c-ralink.c | 327 ++++++++++++++++++++ - 4 files changed, 359 insertions(+) - create mode 100644 Documentation/devicetree/bindings/i2c/i2c-ralink.txt - create mode 100644 drivers/i2c/busses/i2c-ralink.c - ---- /dev/null -+++ b/Documentation/devicetree/bindings/i2c/i2c-ralink.txt -@@ -0,0 +1,27 @@ -+I2C for Ralink platforms -+ -+Required properties : -+- compatible : Must be "link,rt3052-i2c" -+- reg: physical base address of the controller and length of memory mapped -+ region. -+- #address-cells = <1>; -+- #size-cells = <0>; -+ -+Optional properties: -+- Child nodes conforming to i2c bus binding -+ -+Example : -+ -+palmbus@10000000 { -+ i2c@900 { -+ compatible = "link,rt3052-i2c"; -+ reg = <0x900 0x100>; -+ #address-cells = <1>; -+ #size-cells = <0>; -+ -+ hwmon@4b { -+ compatible = "national,lm92"; -+ reg = <0x4b>; -+ }; -+ }; -+}; ---- a/drivers/i2c/busses/Kconfig -+++ b/drivers/i2c/busses/Kconfig -@@ -803,6 +803,10 @@ config I2C_RK3X - This driver can also be built as a module. If so, the module will - be called i2c-rk3x. - -+config I2C_RALINK -+ tristate "Ralink I2C Controller" -+ select OF_I2C -+ - config HAVE_S3C2410_I2C - bool - help ---- a/drivers/i2c/busses/Makefile -+++ b/drivers/i2c/busses/Makefile -@@ -75,6 +75,7 @@ obj-$(CONFIG_I2C_PNX) += i2c-pnx.o - obj-$(CONFIG_I2C_PUV3) += i2c-puv3.o - obj-$(CONFIG_I2C_PXA) += i2c-pxa.o - obj-$(CONFIG_I2C_PXA_PCI) += i2c-pxa-pci.o -+obj-$(CONFIG_I2C_RALINK) += i2c-ralink.o - obj-$(CONFIG_I2C_QUP) += i2c-qup.o - obj-$(CONFIG_I2C_RIIC) += i2c-riic.o - obj-$(CONFIG_I2C_RK3X) += i2c-rk3x.o ---- /dev/null -+++ b/drivers/i2c/busses/i2c-ralink.c -@@ -0,0 +1,327 @@ -+/* -+ * drivers/i2c/busses/i2c-ralink.c -+ * -+ * Copyright (C) 2013 Steven Liu <steven_liu@mediatek.com> -+ * -+ * Improve driver for i2cdetect from i2c-tools to detect i2c devices on the bus. -+ * (C) 2014 Sittisak <sittisaks@hotmail.com> -+ * -+ * This software is licensed under the terms of the GNU General Public -+ * License version 2, as published by the Free Software Foundation, and -+ * may be copied, distributed, and modified under those terms. -+ * -+ * 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. -+ * -+ */ -+ -+#include <linux/interrupt.h> -+#include <linux/kernel.h> -+#include <linux/module.h> -+#include <linux/reset.h> -+#include <linux/delay.h> -+#include <linux/slab.h> -+#include <linux/init.h> -+#include <linux/errno.h> -+#include <linux/platform_device.h> -+#include <linux/of_platform.h> -+#include <linux/i2c.h> -+#include <linux/io.h> -+#include <linux/err.h> -+ -+#include <asm/mach-ralink/ralink_regs.h> -+ -+#define REG_CONFIG_REG 0x00 -+#define REG_CLKDIV_REG 0x04 -+#define REG_DEVADDR_REG 0x08 -+#define REG_ADDR_REG 0x0C -+#define REG_DATAOUT_REG 0x10 -+#define REG_DATAIN_REG 0x14 -+#define REG_STATUS_REG 0x18 -+#define REG_STARTXFR_REG 0x1C -+#define REG_BYTECNT_REG 0x20 -+#define REG_SM0CFG2 0x28 -+#define REG_SM0CTL0 0x40 -+ -+#define I2C_STARTERR BIT(4) -+#define I2C_ACKERR BIT(3) -+#define I2C_DATARDY BIT(2) -+#define I2C_SDOEMPTY BIT(1) -+#define I2C_BUSY BIT(0) -+ -+#define I2C_DEVADLEN_7 (6 << 2) -+#define I2C_ADDRDIS BIT(1) -+ -+#define CLKDIV_VALUE 200 // clock rate is 40M, 40M / (200*2) = 100k (standard i2c bus rate). -+//#define CLKDIV_VALUE 50 // clock rate is 40M, 40M / (50*2) = 400k (fast i2c bus rate). -+ -+#define READ_CMD 0x01 -+#define WRITE_CMD 0x00 -+#define READ_BLOCK 64 -+ -+#define SM0CTL0_OD BIT(31) -+#define SM0CTL0_VTRIG BIT(28) -+#define SM0CTL0_OUTHI BIT(6) -+#define SM0CTL0_STRETCH BIT(1) -+#define SM0CTL0_DEFAULT (SM0CTL0_OD | SM0CTL0_VTRIG | SM0CTL0_OUTHI | SM0CTL0_STRETCH) -+ -+/* timeout waiting for I2C devices to respond (clock streching) */ -+#define RT_I2C_TIMEOUT (msecs_to_jiffies(1000)) -+ -+enum { -+ I2C_TYPE_RALINK, -+ I2C_TYPE_MEDIATEK, -+}; -+ -+static void __iomem *membase; -+static struct i2c_adapter *adapter; -+static int hw_type; -+ -+static void rt_i2c_w32(u32 val, unsigned reg) -+{ -+ iowrite32(val, membase + reg); -+} -+ -+static u32 rt_i2c_r32(unsigned reg) -+{ -+ return ioread32(membase + reg); -+} -+ -+static inline int rt_i2c_get_ack(void) -+{ -+ return (rt_i2c_r32(REG_STATUS_REG) & I2C_ACKERR) ? -EIO : 0; -+} -+ -+static inline int rt_i2c_wait_rx_done(void) -+{ -+ unsigned long timeout; -+ -+ timeout = jiffies + RT_I2C_TIMEOUT; -+ -+ do { -+ if (time_after(jiffies, timeout)) -+ return (-ETIMEDOUT); -+ -+ } while (!(rt_i2c_r32(REG_STATUS_REG) & I2C_DATARDY)); -+ -+ return 0; -+} -+ -+static inline int rt_i2c_wait_idle(void) -+{ -+ unsigned long timeout; -+ -+ timeout = jiffies + RT_I2C_TIMEOUT; -+ -+ do { -+ if (time_after(jiffies, timeout)) { -+ printk("i2c-read line busy\n"); -+ return 1; -+ } -+ } while (rt_i2c_r32(REG_STATUS_REG) & I2C_BUSY); -+ -+ return 0; -+} -+ -+static inline int rt_i2c_wait_tx_done(void) -+{ -+ unsigned long timeout; -+ -+ timeout = jiffies + RT_I2C_TIMEOUT; -+ -+ do { -+ if (time_after(jiffies, timeout)) -+ return (-ETIMEDOUT); -+ -+ } while (!(rt_i2c_r32(REG_STATUS_REG) & I2C_SDOEMPTY)); -+ -+ return 0; -+} -+ -+static int rt_i2c_handle_msg(struct i2c_adapter *a, struct i2c_msg* msg) -+{ -+ int i = 0, j = 0, pos = 0; -+ int nblock = msg->len / READ_BLOCK; -+ int rem = msg->len % READ_BLOCK; -+ int ret = 0; -+ -+ if (msg->flags & I2C_M_TEN) { -+ printk("10 bits addr not supported\n"); -+ return -EINVAL; -+ } -+ -+ if (msg->flags & I2C_M_RD) { -+ for (i = 0; i < nblock; i++) { -+ if (rt_i2c_wait_idle()) -+ return -ETIMEDOUT; -+ rt_i2c_w32(READ_BLOCK - 1, REG_BYTECNT_REG); -+ rt_i2c_w32(READ_CMD, REG_STARTXFR_REG); -+ for (j = 0; j < READ_BLOCK; j++) { -+ if (rt_i2c_wait_rx_done() < 0) -+ ret = rt_i2c_wait_rx_done(); -+ if (rt_i2c_get_ack() < 0) -+ ret = rt_i2c_get_ack(); -+ msg->buf[pos++] = rt_i2c_r32(REG_DATAIN_REG); -+ } -+ } -+ -+ if (rt_i2c_wait_idle()) -+ return -ETIMEDOUT; -+ if (rem) { -+ rt_i2c_w32(rem - 1, REG_BYTECNT_REG); -+ rt_i2c_w32(READ_CMD, REG_STARTXFR_REG); -+ } -+ for (i = 0; i < rem; i++) { -+ if (rt_i2c_wait_rx_done() < 0) -+ ret = rt_i2c_wait_rx_done(); -+ if (rt_i2c_get_ack() < 0) -+ ret = rt_i2c_get_ack(); -+ -+ msg->buf[pos++] = rt_i2c_r32(REG_DATAIN_REG); -+ } -+ } else { -+ if (rt_i2c_wait_idle()) -+ return -ETIMEDOUT; -+ rt_i2c_w32(msg->len - 1, REG_BYTECNT_REG); -+ for (i = 0; i < msg->len; i++) { -+ rt_i2c_w32(msg->buf[i], REG_DATAOUT_REG); -+ rt_i2c_w32(WRITE_CMD, REG_STARTXFR_REG); -+ -+ if (rt_i2c_wait_tx_done() < 0) -+ ret = rt_i2c_wait_tx_done(); -+ if (rt_i2c_get_ack() < 0) -+ ret = rt_i2c_get_ack(); -+ } -+ } -+ -+ return ret; -+} -+ -+static int rt_i2c_master_xfer(struct i2c_adapter *a, struct i2c_msg *m, int n) -+{ -+ int i = 0; -+ int ret = 0; -+ -+ if (rt_i2c_wait_idle()) -+ return -ETIMEDOUT; -+ -+ device_reset(a->dev.parent); -+ -+ rt_i2c_w32(m->addr, REG_DEVADDR_REG); -+ rt_i2c_w32(I2C_DEVADLEN_7 | I2C_ADDRDIS, REG_CONFIG_REG); -+ if (hw_type == I2C_TYPE_RALINK) { -+ rt_i2c_w32(CLKDIV_VALUE, REG_CLKDIV_REG); -+ } else { -+ rt_i2c_w32((CLKDIV_VALUE << 16) | SM0CTL0_DEFAULT, REG_SM0CTL0); -+ rt_i2c_w32(1, REG_SM0CFG2); -+ } -+ -+ for (i = 0; i < n && !ret; i++) { -+ ret = rt_i2c_handle_msg(a, &m[i]); -+ -+ if (ret < 0) { -+ return ret; -+ } -+ } -+ -+ return n; -+} -+ -+static u32 rt_i2c_func(struct i2c_adapter *a) -+{ -+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; -+} -+ -+static const struct i2c_algorithm rt_i2c_algo = { -+ .master_xfer = rt_i2c_master_xfer, -+ .functionality = rt_i2c_func, -+}; -+ -+static const struct of_device_id i2c_rt_dt_ids[] = { -+ { .compatible = "ralink,rt2880-i2c", .data = (void *) I2C_TYPE_RALINK }, -+ { .compatible = "mediatek,mt7628-i2c", .data = (void *) I2C_TYPE_MEDIATEK }, -+ { /* sentinel */ } -+}; -+ -+MODULE_DEVICE_TABLE(of, i2c_rt_dt_ids); -+ -+static int rt_i2c_probe(struct platform_device *pdev) -+{ -+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); -+ const struct of_device_id *match; -+ int ret; -+ -+ match = of_match_device(i2c_rt_dt_ids, &pdev->dev); -+ hw_type = (int) match->data; -+ -+ if (!res) { -+ dev_err(&pdev->dev, "no memory resource found\n"); -+ return -ENODEV; -+ } -+ -+ adapter = devm_kzalloc(&pdev->dev, sizeof(struct i2c_adapter), GFP_KERNEL); -+ if (!adapter) { -+ dev_err(&pdev->dev, "failed to allocate i2c_adapter\n"); -+ return -ENOMEM; -+ } -+ -+ membase = devm_ioremap_resource(&pdev->dev, res); -+ if (IS_ERR(membase)) -+ return PTR_ERR(membase); -+ -+ strlcpy(adapter->name, dev_name(&pdev->dev), sizeof(adapter->name)); -+ adapter->owner = THIS_MODULE; -+ adapter->nr = pdev->id; -+ adapter->timeout = HZ; -+ adapter->algo = &rt_i2c_algo; -+ adapter->class = I2C_CLASS_HWMON | I2C_CLASS_SPD; -+ adapter->dev.parent = &pdev->dev; -+ adapter->dev.of_node = pdev->dev.of_node; -+ -+ ret = i2c_add_numbered_adapter(adapter); -+ if (ret) -+ return ret; -+ -+ platform_set_drvdata(pdev, adapter); -+ -+ dev_info(&pdev->dev, "loaded\n"); -+ -+ return 0; -+} -+ -+static int rt_i2c_remove(struct platform_device *pdev) -+{ -+ platform_set_drvdata(pdev, NULL); -+ -+ return 0; -+} -+ -+static struct platform_driver rt_i2c_driver = { -+ .probe = rt_i2c_probe, -+ .remove = rt_i2c_remove, -+ .driver = { -+ .owner = THIS_MODULE, -+ .name = "i2c-ralink", -+ .of_match_table = i2c_rt_dt_ids, -+ }, -+}; -+ -+static int __init i2c_rt_init (void) -+{ -+ return platform_driver_register(&rt_i2c_driver); -+} -+subsys_initcall(i2c_rt_init); -+ -+static void __exit i2c_rt_exit (void) -+{ -+ platform_driver_unregister(&rt_i2c_driver); -+} -+ -+module_exit (i2c_rt_exit); -+ -+MODULE_AUTHOR("Steven Liu <steven_liu@mediatek.com>"); -+MODULE_DESCRIPTION("Ralink I2c host driver"); -+MODULE_LICENSE("GPL"); -+MODULE_ALIAS("platform:Ralink-I2C"); |