From: John Crispin Date: Thu, 12 Mar 2015 10:06:17 +0000 (+0000) Subject: ralink: MT7621 add i2c controller driver X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=8c19f53007643b4b089bbf7592ffa5385caaf19a;p=openwrt%2Fstaging%2Fblocktrron.git ralink: MT7621 add i2c controller driver ralink i2c driver is not working on MT7621 platform. Porting a new drivers from MTK's source code. Signed-off-by: daixj SVN-Revision: 44690 --- diff --git a/target/linux/ramips/modules.mk b/target/linux/ramips/modules.mk index 550a8c2930..d72e0aa88b 100644 --- a/target/linux/ramips/modules.mk +++ b/target/linux/ramips/modules.mk @@ -27,7 +27,7 @@ I2C_RALINK_MODULES:= \ define KernelPackage/i2c-ralink $(call i2c_defaults,$(I2C_RALINK_MODULES),59) TITLE:=Ralink I2C Controller - DEPENDS:=@TARGET_ramips kmod-i2c-core + DEPENDS:=@TARGET_ramips @(!TARGET_ramips_mt7621) kmod-i2c-core endef define KernelPackage/i2c-ralink/description @@ -36,6 +36,24 @@ endef $(eval $(call KernelPackage,i2c-ralink)) + +I2C_MT7621_MODULES:= \ + CONFIG_I2C_MT7621:drivers/i2c/busses/i2c-mt7621 + +define KernelPackage/i2c-mt7621 + $(call i2c_defaults,$(I2C_MT7621_MODULES),59) + TITLE:=MT7621 I2C Controller + DEPENDS:=@TARGET_ramips @TARGET_ramips_mt7621 kmod-i2c-core +endef + +define KernelPackage/i2c-mt7621/description + Kernel modules for enable mt7621 i2c controller. +endef + +$(eval $(call KernelPackage,i2c-mt7621)) + + + define KernelPackage/sound-mt7620 TITLE:=MT7620 PCM/I2S Alsa Driver DEPENDS:=@TARGET_ramips_mt7620 +kmod-sound-soc-core +kmod-regmap diff --git a/target/linux/ramips/patches-3.14/0111-i2c-MIPS-add-mt7621-I2C-driver.patch b/target/linux/ramips/patches-3.14/0111-i2c-MIPS-add-mt7621-I2C-driver.patch new file mode 100644 index 0000000000..5f10a803e1 --- /dev/null +++ b/target/linux/ramips/patches-3.14/0111-i2c-MIPS-add-mt7621-I2C-driver.patch @@ -0,0 +1,390 @@ +Index: linux-3.14.30/drivers/i2c/busses/Kconfig +=================================================================== +--- linux-3.14.30.orig/drivers/i2c/busses/Kconfig 2015-03-11 16:46:46.963996212 +0800 ++++ linux-3.14.30/drivers/i2c/busses/Kconfig 2015-03-12 10:40:34.849574512 +0800 +@@ -663,6 +663,10 @@ + tristate "Ralink I2C Controller" + select OF_I2C + ++config I2C_MT7621 ++ tristate "Mt7621 I2C Controller" ++ select OF_I2C ++ + config HAVE_S3C2410_I2C + bool + help +Index: linux-3.14.30/drivers/i2c/busses/Makefile +=================================================================== +--- linux-3.14.30.orig/drivers/i2c/busses/Makefile 2015-03-11 16:46:46.967996212 +0800 ++++ linux-3.14.30/drivers/i2c/busses/Makefile 2015-03-11 17:52:43.008121712 +0800 +@@ -64,6 +64,7 @@ + obj-$(CONFIG_I2C_PXA) += i2c-pxa.o + obj-$(CONFIG_I2C_PXA_PCI) += i2c-pxa-pci.o + obj-$(CONFIG_I2C_RALINK) += i2c-ralink.o ++obj-$(CONFIG_I2C_MT7621) += i2c-mt7621.o + obj-$(CONFIG_I2C_RIIC) += i2c-riic.o + obj-$(CONFIG_I2C_S3C2410) += i2c-s3c2410.o + obj-$(CONFIG_I2C_S6000) += i2c-s6000.o +Index: linux-3.14.30/drivers/i2c/busses/i2c-mt7621.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-3.14.30/drivers/i2c/busses/i2c-mt7621.c 2015-03-12 11:45:00.449759139 +0800 +@@ -0,0 +1,358 @@ ++/* ++ * drivers/i2c/busses/i2c-mt7621.c ++ * ++ * Copyright (C) 2013 Steven Liu ++ * ++ * Improve driver for i2cdetect from i2c-tools to detect i2c devices on the bus. ++ * (C) 2014 Sittisak ++ * ++ * 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 ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++ ++#include ++ ++#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_SM0_IS_AUTOMODE 0x28 ++#define REG_SM0CTL0 0x40 ++ ++ ++#define I2C_STARTERR 0x10 ++#define I2C_ACKERR 0x08 ++#define I2C_DATARDY 0x04 ++#define I2C_SDOEMPTY 0x02 ++#define I2C_BUSY 0x01 ++ ++/* I2C_CFG register bit field */ ++#define I2C_CFG_ADDRLEN_8 (7<<5) /* 8 bits */ ++#define I2C_CFG_DEVADLEN_7 (6<<2) ++#define I2C_CFG_ADDRDIS (1<<1) ++#define I2C_CFG_DEVADDIS (1<<0) ++ ++#define I2C_CFG_DEFAULT (I2C_CFG_ADDRLEN_8 | \ ++ I2C_CFG_DEVADLEN_7 | \ ++ I2C_CFG_ADDRDIS) ++ ++#define I2C_RETRY 0x1000 ++ ++#define CLKDIV_VALUE 333 ++#define i2c_busy_loop (CLKDIV_VALUE*30) ++ ++#define READ_CMD 0x01 ++#define WRITE_CMD 0x00 ++#define READ_BLOCK 16 ++ ++#define I2C_OFFSET 0x900 ++#define RSTCTRL_OFFSET 0x34 ++ ++#define MT7621_REG(x) (*((volatile u32 *)(x))) ++ ++struct i2c_algo_mt7621_data{ ++ u32 ioaddr; ++ wait_queue_head_t waitq; ++ spinlock_t lock; ++ int id; ++}; ++/***********************************************************/ ++ ++static unsigned long clkdiv_value = CLKDIV_VALUE; ++ ++static void __iomem *memsysctlbase; ++static void __iomem *membase; ++static struct i2c_adapter *adapter; ++static int i2c_id; ++ ++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 void mt7621_i2c_reset(void) ++{ ++ u32 val; ++ val = MT7621_REG(RSTCTRL_OFFSET+memsysctlbase); ++ val = val | (1<<16); ++ MT7621_REG(RSTCTRL_OFFSET+memsysctlbase) = val; ++ val = val & ~(1<<16); ++ MT7621_REG(RSTCTRL_OFFSET+memsysctlbase) = val; ++ udelay(500); ++} ++static void mt7621_i2c_enable(struct i2c_msg *msg) ++{ ++ rt_i2c_w32(msg->addr,REG_DEVADDR_REG); ++ rt_i2c_w32(0,REG_ADDR_REG); ++} ++ ++static void i2c_master_init(void) ++{ ++ u32 value; ++ /*set mt7621 i2c mode*/ ++ (*((volatile u32*)(memsysctlbase+0x60))) &=~0x4; ++ ++ mt7621_i2c_reset(); ++ rt_i2c_w32(I2C_CFG_DEFAULT,REG_CONFIG_REG); ++ ++ value = 1<< 31; ++ value |= 1<<28; ++ value |= clkdiv_value <<16; ++ value |= 1<<6; ++ value |= 1<<1; ++ rt_i2c_w32(value,REG_SM0CTL0); ++ rt_i2c_w32(1,REG_SM0_IS_AUTOMODE);//auto mode ++} ++ ++ ++static inline int rt_i2c_wait_rx_done(void) ++{ ++ int i=0; ++ while((!(rt_i2c_r32(REG_STATUS_REG) & I2C_DATARDY)) && (i=i2c_busy_loop){ ++ pr_err("err,wait for idle timeout"); ++ return -ETIMEDOUT; ++ } ++ return 0; ++} ++ ++static inline int rt_i2c_wait_idle(void) ++{ ++ int i=0; ++ while((rt_i2c_r32(REG_STATUS_REG) & I2C_BUSY) && (i=i2c_busy_loop){ ++ pr_err("err,wait for idle timeout"); ++ return -ETIMEDOUT; ++ } ++ return 0; ++} ++ ++static inline int rt_i2c_wait_tx_done(void) ++{ ++ int i=0; ++ while((!(rt_i2c_r32(REG_STATUS_REG) & I2C_SDOEMPTY)) && (i=i2c_busy_loop){ ++ pr_err("err,wait for idle timeout"); ++ return -ETIMEDOUT; ++ } ++ 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; ++ ++ 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()) ++ goto ERR_TIMEOUT; ++ 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()) ++ goto ERR_TIMEOUT; ++ msg->buf[pos++] = rt_i2c_r32(REG_DATAIN_REG); ++ } ++ } ++ ++ if (rt_i2c_wait_idle()) { ++ goto ERR_TIMEOUT; ++ } ++ ++ 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()) ++ goto ERR_TIMEOUT; ++ msg->buf[pos++] = rt_i2c_r32(REG_DATAIN_REG); ++ } ++ } else { ++ if (rt_i2c_wait_idle()) { ++ goto ERR_TIMEOUT; ++ } ++ 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); ++ if(i == 0) ++ rt_i2c_w32(WRITE_CMD, REG_STARTXFR_REG); ++ ++ if (rt_i2c_wait_tx_done()) ++ goto ERR_TIMEOUT; ++ } ++ } ++ ++ return 0; ++ERR_TIMEOUT: ++ return -ETIMEDOUT; ++} ++ ++static int rt_i2c_master_xfer(struct i2c_adapter *a, struct i2c_msg *m, int n) ++{ ++ int i = 0; ++ int ret = 0; ++ i2c_master_init(); ++ mt7621_i2c_enable(m); ++ ++ for (i = 0; i != n && ret==0; i++) { ++ ret = rt_i2c_handle_msg(a, &m[i]); ++ ++ if (ret) { ++ return ret; ++ } ++ } ++ ++ return i; ++} ++ ++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 int rt_i2c_probe(struct platform_device *pdev) ++{ ++ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ int ret; ++ struct i2c_algo_mt7621_data *adapter_data; ++ ++ adapter = kzalloc(sizeof(struct i2c_adapter), GFP_KERNEL); ++ if (!adapter) { ++ dev_err(&pdev->dev, "failed to allocate i2c_adapter\n"); ++ ret = -ENOMEM; ++ goto out; ++ } ++ adapter_data = kzalloc(sizeof(struct i2c_algo_mt7621_data), GFP_KERNEL); ++ if (!adapter_data) { ++ ret = -ENOMEM; ++ goto free_adapter; ++ } ++ ++ membase = devm_request_and_ioremap(&pdev->dev, res); ++ if (IS_ERR(membase)){ ++ ret = -EBUSY; ++ goto free_both; ++ } ++ memsysctlbase = membase - I2C_OFFSET; ++ ++ adapter_data->id = i2c_id++; ++ 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; ++ ++ init_waitqueue_head(&adapter_data->waitq); ++ spin_lock_init(&adapter_data->lock); ++ ++ platform_set_drvdata(pdev, adapter); ++ adapter->algo_data = adapter_data; ++ ++ ret = i2c_add_numbered_adapter(adapter); ++ if (ret) ++ return ret; ++ ++ printk("MT7621A i2c add adapter is ok\n"); ++ ++ return 0; ++free_both: ++ kfree(adapter_data); ++ free_adapter: ++ kfree(adapter); ++out: ++ return ret; ++} ++ ++static int rt_i2c_remove(struct platform_device *pdev) ++{ ++ struct i2c_algo_mt7621_data *adapter_data = (struct i2c_algo_mt7621_data *)adapter->algo_data; ++ release_mem_region((resource_size_t)membase,0x100); ++ kfree(adapter_data); ++ kfree(adapter); ++ platform_set_drvdata(pdev, NULL); ++ ++ return 0; ++} ++ ++static const struct of_device_id i2c_rt_dt_ids[] = { ++ { .compatible = "ralink,i2c-mt7621", }, ++ { /* sentinel */ } ++}; ++ ++MODULE_DEVICE_TABLE(of, i2c_rt_dt_ids); ++ ++static struct platform_driver rt_i2c_driver = { ++ .probe = rt_i2c_probe, ++ .remove = rt_i2c_remove, ++ .driver = { ++ .owner = THIS_MODULE, ++ .name = "i2c-mt7621", ++ .of_match_table = i2c_rt_dt_ids, ++ }, ++}; ++ ++static int __init i2c_rt_init (void) ++{ ++ return platform_driver_register(&rt_i2c_driver); ++} ++ ++static void __exit i2c_rt_exit (void) ++{ ++ platform_driver_unregister(&rt_i2c_driver); ++} ++module_init (i2c_rt_init); ++module_exit (i2c_rt_exit); ++ ++MODULE_AUTHOR("Steven Liu "); ++MODULE_DESCRIPTION("MT7621 I2c host driver"); ++MODULE_LICENSE("GPL"); ++MODULE_ALIAS("platform:MT7621-I2C");