diff options
Diffstat (limited to 'target/linux/ramips/patches-4.3/0045-i2c-add-mt7621-driver.patch')
| -rw-r--r-- | target/linux/ramips/patches-4.3/0045-i2c-add-mt7621-driver.patch | 342 |
1 files changed, 0 insertions, 342 deletions
diff --git a/target/linux/ramips/patches-4.3/0045-i2c-add-mt7621-driver.patch b/target/linux/ramips/patches-4.3/0045-i2c-add-mt7621-driver.patch deleted file mode 100644 index dc961fab34..0000000000 --- a/target/linux/ramips/patches-4.3/0045-i2c-add-mt7621-driver.patch +++ /dev/null @@ -1,342 +0,0 @@ -From d5c54ff3d1db0a4348fa04d8e78f3bf6063e3afc Mon Sep 17 00:00:00 2001 -From: John Crispin <blogic@openwrt.org> -Date: Mon, 7 Dec 2015 17:21:27 +0100 -Subject: [PATCH 45/53] i2c: add mt7621 driver - -Signed-off-by: John Crispin <blogic@openwrt.org> ---- - drivers/i2c/busses/Kconfig | 4 + - drivers/i2c/busses/Makefile | 1 + - drivers/i2c/busses/i2c-mt7621.c | 303 +++++++++++++++++++++++++++++++++++++++ - 3 files changed, 308 insertions(+) - create mode 100644 drivers/i2c/busses/i2c-mt7621.c - ---- a/drivers/i2c/busses/Kconfig -+++ b/drivers/i2c/busses/Kconfig -@@ -807,6 +807,10 @@ config I2C_RALINK - tristate "Ralink I2C Controller" - select OF_I2C - -+config I2C_MT7621 -+ tristate "MT7621 I2C Controller" -+ select OF_I2C -+ - config HAVE_S3C2410_I2C - bool - help ---- a/drivers/i2c/busses/Makefile -+++ b/drivers/i2c/busses/Makefile -@@ -76,6 +76,7 @@ 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-$(CONFIG_I2C_MT7621) += i2c-mt7621.o - obj-$(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-mt7621.c -@@ -0,0 +1,303 @@ -+/* -+ * drivers/i2c/busses/i2c-mt7621.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/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_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 BIT(1) -+#define I2C_CFG_DEVADDIS BIT(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 SM0_ODRAIN BIT(31) -+#define SM0_VSYNC_MODE BIT(28) -+#define SM0_CLK_DIV (CLKDIV_VALUE << 16) -+#define SM0_WAIT_LEVEL BIT(6) -+#define SM0_EN BIT(1) -+ -+#define SM0_CFG_DEFUALT (SM0_ODRAIN | SM0_VSYNC_MODE | \ -+ SM0_CLK_DIV | SM0_WAIT_LEVEL | \ -+ SM0_EN) -+/***********************************************************/ -+ -+static void __iomem *membase; -+static struct i2c_adapter *adapter; -+ -+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(struct i2c_adapter *a) -+{ -+ device_reset(a->dev.parent); -+} -+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(struct i2c_adapter *a) -+{ -+ mt7621_i2c_reset(a); -+ rt_i2c_w32(I2C_CFG_DEFAULT,REG_CONFIG_REG); -+ rt_i2c_w32(SM0_CFG_DEFUALT,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)) -+ i++; -+ if(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)) -+ i++; -+ if(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)) -+ i++; -+ if(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(a); -+ 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; -+ -+ 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; -+ -+ platform_set_drvdata(pdev, adapter); -+ -+ ret = i2c_add_numbered_adapter(adapter); -+ if (ret) -+ return ret; -+ -+ dev_info(&pdev->dev,"loaded"); -+ -+ return 0; -+} -+ -+static int rt_i2c_remove(struct platform_device *pdev) -+{ -+ 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 <steven_liu@mediatek.com>"); -+MODULE_DESCRIPTION("MT7621 I2c host driver"); -+MODULE_LICENSE("GPL"); -+MODULE_ALIAS("platform:MT7621-I2C"); |