[OpenWrt-Devel] [PATCH] ralink: MT7621 add i2c controller driver
wengbj
fl.service at t-firefly.com
Wed Mar 25 06:07:48 EDT 2015
ralink i2c driver is not working on MT7621 platform. Porting a new drivers from MTK's source code.
Signed-off-by: Jay Weng <fl.service at t-firefly.com>
---
package/kernel/linux/modules/fs.mk | 4 +-
package/kernel/linux/modules/usb.mk | 13 +-
target/linux/ramips/dts/FIREWRT.dts | 2 +-
target/linux/ramips/image/Makefile | 2 +-
target/linux/ramips/mt7621/config-3.18 | 16 +-
.../0111-i2c-MIPS-add-mt7621-I2C-driver.patch | 335 ++++++++++++++++++++
6 files changed, 359 insertions(+), 13 deletions(-)
create mode 100755 target/linux/ramips/patches-3.18/0111-i2c-MIPS-add-mt7621-I2C-driver.patch
diff --git a/package/kernel/linux/modules/fs.mk b/package/kernel/linux/modules/fs.mk
index 64182e6..e3e8c57 100644
--- a/package/kernel/linux/modules/fs.mk
+++ b/package/kernel/linux/modules/fs.mk
@@ -156,8 +156,8 @@ define KernelPackage/fs-ext4
SUBMENU:=$(FS_MENU)
TITLE:=EXT4 filesystem support
KCONFIG:= \
- CONFIG_EXT4_FS \
- CONFIG_JBD2
+ CONFIG_EXT4_FS=y \
+ CONFIG_JBD2=y
FILES:= \
$(LINUX_DIR)/fs/ext4/ext4.ko \
$(LINUX_DIR)/fs/jbd2/jbd2.ko \
diff --git a/package/kernel/linux/modules/usb.mk b/package/kernel/linux/modules/usb.mk
index be1553a..fa01a65 100644
--- a/package/kernel/linux/modules/usb.mk
+++ b/package/kernel/linux/modules/usb.mk
@@ -15,7 +15,7 @@ define KernelPackage/usb-core
SUBMENU:=$(USB_MENU)
TITLE:=Support for USB
DEPENDS:=@USB_SUPPORT
- KCONFIG:=CONFIG_USB CONFIG_XPS_USB_HCD_XILINX=n CONFIG_USB_FHCI_HCD=n
+ KCONFIG:=CONFIG_USB=y CONFIG_XPS_USB_HCD_XILINX=n CONFIG_USB_FHCI_HCD=n
FILES:= \
$(LINUX_DIR)/drivers/usb/core/usbcore.ko \
$(LINUX_DIR)/drivers/usb/usb-common.ko at lt3.16 \
@@ -168,7 +168,7 @@ $(eval $(call KernelPackage,usb-phy-omap-usb2))
define KernelPackage/usb-phy-omap-usb3
TITLE:=Support for OMAP USB3 PHY
- KCONFIG:=CONFIG_OMAP_USB3
+ KCONFIG:=CONFIG_OMAP_USB3=y
DEPENDS:=@TARGET_omap +kmod-usb-phy-omap-usb2
FILES:=$(LINUX_DIR)/drivers/usb/phy/phy-omap-usb3.ko
AUTOLOAD:=$(call AutoLoad,45,phy-omap-usb3)
@@ -873,8 +873,7 @@ $(eval $(call KernelPackage,usb-serial-qualcomm))
define KernelPackage/usb-storage
TITLE:=USB Storage support
DEPENDS:= +kmod-scsi-core
- KCONFIG:=CONFIG_USB_STORAGE
- FILES:=$(LINUX_DIR)/drivers/usb/storage/usb-storage.ko
+ KCONFIG:= CONFIG_USB_STORAGE=y
AUTOLOAD:=$(call AutoProbe,usb-storage,1)
$(call AddDepends/usb)
endef
@@ -1477,9 +1476,9 @@ define KernelPackage/usb3
TITLE:=Support for USB3 controllers
DEPENDS:=+TARGET_omap:kmod-usb-phy-omap-usb3
KCONFIG:= \
- CONFIG_USB_XHCI_HCD \
- CONFIG_USB_XHCI_PCI \
- CONFIG_USB_XHCI_PLATFORM \
+ CONFIG_USB_XHCI_HCD=y \
+ CONFIG_USB_XHCI_PCI=y \
+ CONFIG_USB_XHCI_PLATFORM=y \
CONFIG_USB_XHCI_HCD_DEBUGGING=n
FILES:= \
$(XHCI_FILES)
diff --git a/target/linux/ramips/dts/FIREWRT.dts b/target/linux/ramips/dts/FIREWRT.dts
index 54f0e55..e25a035 100644
--- a/target/linux/ramips/dts/FIREWRT.dts
+++ b/target/linux/ramips/dts/FIREWRT.dts
@@ -12,7 +12,7 @@
};
chosen {
- bootargs = "console=ttyS0,57600";
+ bootargs = "console=ttyS0,57600 root=/dev/sda1 rw rootwait init=/bin/bash";
};
sdhci at 10130000 {
diff --git a/target/linux/ramips/image/Makefile b/target/linux/ramips/image/Makefile
index 45ae3a5..13fac3b 100644
--- a/target/linux/ramips/image/Makefile
+++ b/target/linux/ramips/image/Makefile
@@ -901,7 +901,7 @@ endif
#
ifeq ($(SUBTARGET),mt7621)
- TARGET_DEVICES += mt7621 wsr-600 wsr-1166 dir-860l-b1 firewrt
+ TARGET_DEVICES += firewrt
endif
define Device/mt7621
diff --git a/target/linux/ramips/mt7621/config-3.18 b/target/linux/ramips/mt7621/config-3.18
index 11d372b..2b7bea1 100644
--- a/target/linux/ramips/mt7621/config-3.18
+++ b/target/linux/ramips/mt7621/config-3.18
@@ -34,6 +34,10 @@ CONFIG_CPU_RMAP=y
CONFIG_CPU_SUPPORTS_32BIT_KERNEL=y
CONFIG_CPU_SUPPORTS_HIGHMEM=y
CONFIG_CPU_SUPPORTS_MSA=y
+CONFIG_CRC16=y
+CONFIG_CRYPTO_CRC32C=y
+CONFIG_CRYPTO_HASH=y
+CONFIG_CRYPTO_HASH2=y
CONFIG_CSRC_R4K=y
CONFIG_DEBUG_PINCTRL=y
CONFIG_DMA_NONCOHERENT=y
@@ -41,6 +45,8 @@ CONFIG_DMA_NONCOHERENT=y
CONFIG_DTB_RT_NONE=y
CONFIG_DTC=y
CONFIG_EARLY_PRINTK=y
+CONFIG_EXT4_FS=y
+CONFIG_FS_MBCACHE=y
CONFIG_GENERIC_ATOMIC64=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
@@ -99,6 +105,7 @@ CONFIG_IRQ_DOMAIN=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_IRQ_GIC=y
CONFIG_IRQ_WORK=y
+CONFIG_JBD2=y
CONFIG_LIBFDT=y
CONFIG_MDIO_BOARDINFO=y
CONFIG_MIPS=y
@@ -126,13 +133,13 @@ CONFIG_MTD_SPLIT_FIRMWARE=y
CONFIG_MTD_SPLIT_SEAMA_FW=y
CONFIG_MTD_SPLIT_TRX_FW=y
CONFIG_MTD_SPLIT_UIMAGE_FW=y
-# CONFIG_MTK_MTD_NAND is not set
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_NET_FLOW_LIMIT=y
CONFIG_NET_RALINK=y
CONFIG_NET_RALINK_GSW_MT7620=y
CONFIG_NET_RALINK_MDIO=y
CONFIG_NET_RALINK_MT7620=y
+CONFIG_NLS=y
CONFIG_NO_GENERIC_PCI_IOPORT_MAP=y
# CONFIG_NO_IOPORT_MAP is not set
CONFIG_NR_CPUS=4
@@ -173,7 +180,7 @@ CONFIG_RESET_CONTROLLER=y
CONFIG_RFS_ACCEL=y
CONFIG_RPS=y
CONFIG_SCHED_SMT=y
-# CONFIG_SCSI_DMA is not set
+CONFIG_SCSI=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_OF_PLATFORM=y
# CONFIG_SLAB is not set
@@ -206,11 +213,16 @@ CONFIG_SYS_SUPPORTS_SCHED_SMT=y
CONFIG_SYS_SUPPORTS_SMP=y
CONFIG_TICK_CPU_ACCOUNTING=y
CONFIG_TREE_RCU=y
+CONFIG_USB=y
+CONFIG_USB_COMMON=y
# CONFIG_USB_EHCI_HCD is not set
CONFIG_USB_MT7621_XHCI_PLATFORM=y
CONFIG_USB_PHY=y
+CONFIG_USB_STORAGE=y
CONFIG_USB_SUPPORT=y
# CONFIG_USB_UHCI_HCD is not set
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_XHCI_PCI=y
CONFIG_USB_XHCI_PLATFORM=y
CONFIG_USE_OF=y
CONFIG_WATCHDOG_CORE=y
diff --git a/target/linux/ramips/patches-3.18/0111-i2c-MIPS-add-mt7621-I2C-driver.patch b/target/linux/ramips/patches-3.18/0111-i2c-MIPS-add-mt7621-I2C-driver.patch
new file mode 100755
index 0000000..5df95f4
--- /dev/null
+++ b/target/linux/ramips/patches-3.18/0111-i2c-MIPS-add-mt7621-I2C-driver.patch
@@ -0,0 +1,335 @@
+Index: linux-3.18.9/drivers/i2c/busses/Kconfig
+===================================================================
+--- linux-3.18.9.orig/drivers/i2c/busses/Kconfig 2015-03-23 15:00:11.730403938 +0800
++++ linux-3.18.9/drivers/i2c/busses/Kconfig 2015-03-23 15:00:11.982403926 +0800
+@@ -714,6 +714,10 @@
+ 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-3.18.9/drivers/i2c/busses/Makefile
+===================================================================
+--- linux-3.18.9.orig/drivers/i2c/busses/Makefile 2015-03-23 15:00:11.730403938 +0800
++++ linux-3.18.9/drivers/i2c/busses/Makefile 2015-03-23 15:00:11.982403926 +0800
+@@ -67,6 +67,7 @@
+ 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-$(CONFIG_I2C_QUP) += i2c-qup.o
+ obj-$(CONFIG_I2C_RIIC) += i2c-riic.o
+ obj-$(CONFIG_I2C_RK3X) += i2c-rk3x.o
+Index: linux-3.18.9/drivers/i2c/busses/i2c-mt7621.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-3.18.9/drivers/i2c/busses/i2c-mt7621.c 2015-03-23 16:31:42.684747034 +0800
+@@ -0,0 +1,303 @@
++/*
++ * drivers/i2c/busses/i2c-mt7621.c
++ *
++ * Copyright (C) 2013 Steven Liu <steven_liu at mediatek.com>
++ *
++ * Improve driver for i2cdetect from i2c-tools to detect i2c devices on the bus.
++ * (C) 2014 Sittisak <sittisaks at 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 at mediatek.com>");
++MODULE_DESCRIPTION("MT7621 I2c host driver");
++MODULE_LICENSE("GPL");
++MODULE_ALIAS("platform:MT7621-I2C");
--
1.7.9.5
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