This is an initial driver for MELFAS touchscreen chip mms144. Signed-off-by: Nikolay Epifanov <[email protected]> --- I don't know whether single driver could be used for both mms114 and mms144. Couldn't find datasheets for any of them.
There are two firmwares available under redistribution license from AOSP tree: for FPCB revisions 3.2 and 3.1. Not sure if those are Melfas original or modified by Samsung. (Just for reference: they are mms144_ts_rev3*.fw at https://android.googlesource.com/device/samsung/tuna/+/214d003a47e7fe2962df667c5d65bce92a21a40e/ mux_fw_flash(bool) from platform data switches pins between I2C<->GPIO modes. Driver has been tested on Samsung Galaxy Nexus except suspend/resume. Applied on git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git branch next. drivers/input/touchscreen/Kconfig | 14 + drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/mms144.c | 821 ++++++++++++++++++++++++++++++++++++ include/linux/i2c/mms144.h | 34 ++ 4 files changed, 870 insertions(+) diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index b93b598..78d9cd3 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -369,6 +369,20 @@ config TOUCHSCREEN_MMS114 To compile this driver as a module, choose M here: the module will be called mms114. +config TOUCHSCREEN_MMS144 + tristate "MELFAS MMS144 touchscreen" + depends on I2C + help + Say Y here if you have the MELFAS MMS144 touchscreen controller + chip in your system. + Such kind of chip can be found in Samsung Galaxy Nexus + touchscreens. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called mms144. + config TOUCHSCREEN_MTOUCH tristate "MicroTouch serial touchscreens" select SERIO diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 5f949c0..cfbe87c 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -39,6 +39,7 @@ obj-$(CONFIG_TOUCHSCREEN_MC13783) += mc13783_ts.o obj-$(CONFIG_TOUCHSCREEN_MCS5000) += mcs5000_ts.o obj-$(CONFIG_TOUCHSCREEN_MIGOR) += migor_ts.o obj-$(CONFIG_TOUCHSCREEN_MMS114) += mms114.o +obj-$(CONFIG_TOUCHSCREEN_MMS144) += mms144.o obj-$(CONFIG_TOUCHSCREEN_MTOUCH) += mtouch.o obj-$(CONFIG_TOUCHSCREEN_MK712) += mk712.o obj-$(CONFIG_TOUCHSCREEN_HP600) += hp680_ts_input.o diff --git a/drivers/input/touchscreen/mms144.c b/drivers/input/touchscreen/mms144.c new file mode 100644 index 0000000..3bb84d0 --- /dev/null +++ b/drivers/input/touchscreen/mms144.c @@ -0,0 +1,821 @@ +/* + * mms144.c - Touchscreen driver for Melfas MMS144 touch controllers + * + * Copyright (C) 2011 Google Inc. + * Author: Dima Zavin <[email protected]> + * Simon Wilson <[email protected]> + * Copyright (C) 2012 Nikolay Epifanov <[email protected]> + * + * ISP reflashing code based on original code from Melfas. + * + * 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. + * + */ + +#include <linux/completion.h> +#include <linux/delay.h> +#include <linux/firmware.h> +#include <linux/gpio.h> +#include <linux/i2c.h> +#include <linux/i2c/mms144.h> +#include <linux/init.h> +#include <linux/input.h> +#include <linux/input/mt.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/slab.h> +#include <linux/unaligned/le_struct.h> + +#define MAX_FINGERS 10 +#define MAX_WIDTH 30 +#define MAX_PRESSURE 255 +#define FINGER_EVENT_SZ 6 + +/* Registers */ +#define MMS_MODE_CONTROL 0x01 +#define MMS_XYRES_HI 0x02 +#define MMS_XRES_LO 0x03 +#define MMS_YRES_LO 0x04 + +#define MMS_INPUT_EVENT_PKT_SZ 0x0F +#define MMS_INPUT_EVENT0 0x10 + +#define MMS_TSP_REVISION 0xF0 +#define MMS_HW_REVISION 0xF1 +#define MMS_COMPAT_GROUP 0xF2 +#define MMS_FW_VERSION 0xF3 + +#define ISP_IC_INFO_ADDR 0x1F00 +/* each address addresses 4-byte words */ +#define ISP_MAX_FW_SIZE (ISP_IC_INFO_ADDR * 4) + +#define FW_HEADER_VERSION 1 + +enum { + ISP_MODE_FLASH_ERASE = 0x59F3, + ISP_MODE_FLASH_WRITE = 0x62CD, + ISP_MODE_FLASH_READ = 0x6AC9, +}; + +static bool mms_force_reflash = false; +module_param_named(force_reflash, mms_force_reflash, bool, S_IWUSR | S_IRUGO); + +struct mms_ts_info { + struct i2c_client *client; + struct input_dev *input_dev; + char phys[32]; + int irq; + struct mms144_platform_data pdata; + + /* protects the enabled flag */ + struct mutex lock; + bool enabled; +}; + +struct mms_fw_image { + __le32 hdr_len; + __le32 data_len; + __le32 fw_ver; + __le32 hdr_ver; + u8 data[0]; +} __packed; + +static irqreturn_t mms_ts_interrupt(int irq, void *dev_id) +{ + struct mms_ts_info *info = dev_id; + struct i2c_client *client = info->client; + u8 buf[MAX_FINGERS * FINGER_EVENT_SZ] = { 0 }; + int ret, i, sz, x, y, id, pressed, width, strength; + u8 reg = MMS_INPUT_EVENT0; + u8 *tmp; + struct i2c_msg msg[] = { + { + .addr = client->addr, + .flags = 0, + .buf = ®, + .len = 1, + }, { + .addr = client->addr, + .flags = I2C_M_RD, + .buf = buf, + }, + }; + + sz = i2c_smbus_read_byte_data(client, MMS_INPUT_EVENT_PKT_SZ); + if (sz < 0) { + dev_err(&client->dev, "%s bytes=%d\n", __func__, sz); + goto out; + } + dev_dbg(&client->dev, "bytes available: %d\n", sz); + BUG_ON(sz > MAX_FINGERS * FINGER_EVENT_SZ); + if (sz == 0) + goto out; + + msg[1].len = sz; + ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); + if (ret != ARRAY_SIZE(msg)) { + dev_err(&client->dev, + "failed to read %d bytes of touch data (%d)\n", + sz, ret); + goto out; + } + +#if defined(VERBOSE_DEBUG) + print_hex_dump(KERN_DEBUG, "mms144 raw: ", + DUMP_PREFIX_OFFSET, 32, 1, buf, sz, false); +#endif + for (i = 0; i < sz; i += FINGER_EVENT_SZ) { + tmp = &buf[i]; + id = (tmp[0] & 0xf) - 1; + pressed = tmp[0] & 0x80; + x = tmp[2] | ((tmp[1] & 0xf) << 8); + y = tmp[3] | ((tmp[1] >> 4) << 8); + width = tmp[4]; + strength = tmp[5]; + + x = min(x, info->pdata.max_x); + y = min(y, info->pdata.max_y); + if (info->pdata.invert_x) + x = info->pdata.max_x - x; + if (info->pdata.invert_y) + y = info->pdata.max_y - y; + + input_mt_slot(info->input_dev, id); + input_mt_report_slot_state(info->input_dev, + MT_TOOL_FINGER, pressed); + if (!pressed) { + dev_dbg(&client->dev, "finger %d up\n", id); + continue; + } + + input_report_abs(info->input_dev, ABS_MT_TOUCH_MAJOR, width); + input_report_abs(info->input_dev, ABS_MT_PRESSURE, strength); + input_report_abs(info->input_dev, ABS_MT_POSITION_X, x); + input_report_abs(info->input_dev, ABS_MT_POSITION_Y, y); + dev_dbg(&client->dev, "id: %d, pressed: %d, x: %d, y: %d, " + "width: %d, strength: %d\n", + id, pressed, x, y, + width, strength); + } + input_mt_report_pointer_emulation(info->input_dev, false); + input_sync(info->input_dev); + +out: + return IRQ_HANDLED; +} + +static void hw_reboot(struct mms_ts_info *info, bool bootloader) +{ + gpio_direction_output(info->pdata.gpio_vdd_en, 0); + gpio_direction_output(info->pdata.gpio_sda, bootloader ? 0 : 1); + gpio_direction_output(info->pdata.gpio_scl, bootloader ? 0 : 1); + gpio_direction_output(info->pdata.gpio_resetb, 0); + msleep(30); + gpio_set_value(info->pdata.gpio_vdd_en, 1); + msleep(30); + + if (bootloader) { + gpio_set_value(info->pdata.gpio_scl, 0); + gpio_set_value(info->pdata.gpio_sda, 1); + } else { + gpio_set_value(info->pdata.gpio_resetb, 1); + gpio_direction_input(info->pdata.gpio_resetb); + gpio_direction_input(info->pdata.gpio_scl); + gpio_direction_input(info->pdata.gpio_sda); + } + msleep(40); +} + +static inline void hw_reboot_bootloader(struct mms_ts_info *info) +{ + hw_reboot(info, true); +} + +static inline void hw_reboot_normal(struct mms_ts_info *info) +{ + hw_reboot(info, false); +} + +static void mms_pwr_on_reset(struct mms_ts_info *info) +{ + struct i2c_adapter *adapter = to_i2c_adapter(info->client->dev.parent); + + i2c_lock_adapter(adapter); + info->pdata.mux_fw_flash(true); + + gpio_direction_output(info->pdata.gpio_vdd_en, 0); + gpio_direction_output(info->pdata.gpio_sda, 1); + gpio_direction_output(info->pdata.gpio_scl, 1); + gpio_direction_output(info->pdata.gpio_resetb, 1); + msleep(50); + gpio_direction_output(info->pdata.gpio_vdd_en, 1); + msleep(50); + + info->pdata.mux_fw_flash(false); + i2c_unlock_adapter(adapter); + + /* TODO: Seems long enough for the firmware to boot. + * Find the right value */ + msleep(250); +} + +static void isp_toggle_clk(struct mms_ts_info *info, int start_lvl, int end_lvl, + int hold_us) +{ + gpio_set_value(info->pdata.gpio_scl, start_lvl); + udelay(hold_us); + gpio_set_value(info->pdata.gpio_scl, end_lvl); + udelay(hold_us); +} + +/* 1 <= cnt <= 32 bits to write */ +static void isp_send_bits(struct mms_ts_info *info, u32 data, int cnt) +{ + gpio_direction_output(info->pdata.gpio_resetb, 0); + gpio_direction_output(info->pdata.gpio_scl, 0); + gpio_direction_output(info->pdata.gpio_sda, 0); + + /* clock out the bits, msb first */ + while (cnt--) { + gpio_set_value(info->pdata.gpio_sda, (data >> cnt) & 1); + udelay(3); + isp_toggle_clk(info, 1, 0, 3); + } +} + +/* 1 <= cnt <= 32 bits to read */ +static u32 isp_recv_bits(struct mms_ts_info *info, int cnt) +{ + u32 data = 0; + + gpio_direction_output(info->pdata.gpio_resetb, 0); + gpio_direction_output(info->pdata.gpio_scl, 0); + gpio_set_value(info->pdata.gpio_sda, 0); + gpio_direction_input(info->pdata.gpio_sda); + + /* clock in the bits, msb first */ + while (cnt--) { + isp_toggle_clk(info, 0, 1, 1); + data = (data << 1) | (!!gpio_get_value(info->pdata.gpio_sda)); + } + + gpio_direction_output(info->pdata.gpio_sda, 0); + return data; +} + +static void isp_enter_mode(struct mms_ts_info *info, u32 mode) +{ + int cnt; + unsigned long flags; + + local_irq_save(flags); + gpio_direction_output(info->pdata.gpio_resetb, 0); + gpio_direction_output(info->pdata.gpio_scl, 0); + gpio_direction_output(info->pdata.gpio_sda, 1); + + mode &= 0xffff; + for (cnt = 15; cnt >= 0; cnt--) { + gpio_set_value(info->pdata.gpio_resetb, (mode >> cnt) & 1); + udelay(3); + isp_toggle_clk(info, 1, 0, 3); + } + + gpio_set_value(info->pdata.gpio_resetb, 0); + local_irq_restore(flags); +} + +static void isp_exit_mode(struct mms_ts_info *info) +{ + int i; + unsigned long flags; + + local_irq_save(flags); + gpio_direction_output(info->pdata.gpio_resetb, 0); + udelay(3); + + for (i = 0; i < 10; i++) + isp_toggle_clk(info, 1, 0, 3); + local_irq_restore(flags); +} + +static void flash_set_address(struct mms_ts_info *info, u16 addr) +{ + /* Only 13 bits of addr are valid. + * The addr is in bits 13:1 of cmd */ + isp_send_bits(info, (u32)(addr & 0x1fff) << 1, 18); +} + +static void flash_erase(struct mms_ts_info *info) +{ + isp_enter_mode(info, ISP_MODE_FLASH_ERASE); + + gpio_direction_output(info->pdata.gpio_resetb, 0); + gpio_direction_output(info->pdata.gpio_scl, 0); + gpio_direction_output(info->pdata.gpio_sda, 1); + + /* 4 clock cycles with different timings for the erase to + * get processed, clk is already 0 from above */ + udelay(7); + isp_toggle_clk(info, 1, 0, 3); + udelay(7); + isp_toggle_clk(info, 1, 0, 3); + usleep_range(25000, 35000); + isp_toggle_clk(info, 1, 0, 3); + usleep_range(150, 200); + isp_toggle_clk(info, 1, 0, 3); + + gpio_set_value(info->pdata.gpio_sda, 0); + + isp_exit_mode(info); +} + +static u32 flash_readl(struct mms_ts_info *info, u16 addr) +{ + int i; + u32 val; + unsigned long flags; + + local_irq_save(flags); + isp_enter_mode(info, ISP_MODE_FLASH_READ); + flash_set_address(info, addr); + + gpio_direction_output(info->pdata.gpio_scl, 0); + gpio_direction_output(info->pdata.gpio_sda, 0); + udelay(40); + + /* data load cycle */ + for (i = 0; i < 6; i++) + isp_toggle_clk(info, 1, 0, 10); + + val = isp_recv_bits(info, 32); + isp_exit_mode(info); + local_irq_restore(flags); + + return val; +} + +static void flash_writel(struct mms_ts_info *info, u16 addr, u32 val) +{ + unsigned long flags; + + local_irq_save(flags); + isp_enter_mode(info, ISP_MODE_FLASH_WRITE); + flash_set_address(info, addr); + isp_send_bits(info, val, 32); + + gpio_direction_output(info->pdata.gpio_sda, 1); + /* 6 clock cycles with different timings for the data to get written + * into flash */ + isp_toggle_clk(info, 0, 1, 3); + isp_toggle_clk(info, 0, 1, 3); + isp_toggle_clk(info, 0, 1, 6); + isp_toggle_clk(info, 0, 1, 12); + isp_toggle_clk(info, 0, 1, 3); + isp_toggle_clk(info, 0, 1, 3); + + isp_toggle_clk(info, 1, 0, 1); + + gpio_direction_output(info->pdata.gpio_sda, 0); + isp_exit_mode(info); + local_irq_restore(flags); + usleep_range(300, 400); +} + +static bool flash_is_erased(struct mms_ts_info *info) +{ + struct i2c_client *client = info->client; + u32 val; + u16 addr; + + for (addr = 0; addr < (ISP_MAX_FW_SIZE / 4); addr++) { + udelay(40); + val = flash_readl(info, addr); + + if (val != 0xffffffff) { + dev_dbg(&client->dev, + "addr 0x%x not erased: 0x%08x != 0xffffffff\n", + addr, val); + return false; + } + } + return true; +} + +static int fw_write_image(struct mms_ts_info *info, const u8 *data, size_t len) +{ + struct i2c_client *client = info->client; + u16 addr; + u32 val, verify_val; + int retries; + + for (addr = 0; addr < (len / 4); addr++, data += 4) { + val = get_unaligned_le32(data); + retries = 3; + + while (retries--) { + flash_writel(info, addr, val); + verify_val = flash_readl(info, addr); + if (val == verify_val) + break; + dev_err(&client->dev, + "mismatch @ addr 0x%x: 0x%x != 0x%x\n", + addr, verify_val, val); + hw_reboot_bootloader(info); + continue; + } + if (retries < 0) + return -ENXIO; + } + + return 0; +} + +static int fw_download(struct mms_ts_info *info, const u8 *data, size_t len) +{ + struct i2c_client *client = info->client; + u32 val; + int ret = 0; + + if (len % 4) { + dev_err(&client->dev, + "fw image size (%d) must be a multiple of 4 bytes\n", + len); + return -EINVAL; + } else if (len > ISP_MAX_FW_SIZE) { + dev_err(&client->dev, + "fw image is too big, %d > %d\n", len, ISP_MAX_FW_SIZE); + return -EINVAL; + } + + dev_info(&client->dev, "fw download start\n"); + + gpio_direction_output(info->pdata.gpio_vdd_en, 0); + gpio_direction_output(info->pdata.gpio_sda, 0); + gpio_direction_output(info->pdata.gpio_scl, 0); + gpio_direction_output(info->pdata.gpio_resetb, 0); + + hw_reboot_bootloader(info); + + val = flash_readl(info, ISP_IC_INFO_ADDR); + dev_info(&client->dev, "IC info: 0x%02x (%x)\n", val & 0xff, val); + + dev_info(&client->dev, "fw erase...\n"); + flash_erase(info); + if (!flash_is_erased(info)) { + ret = -ENXIO; + goto err; + } + + dev_info(&client->dev, "fw write...\n"); + /* XXX: what does this do?! */ + flash_writel(info, ISP_IC_INFO_ADDR, 0xffffff00 | (val & 0xff)); + usleep_range(1000, 1500); + ret = fw_write_image(info, data, len); + if (ret) + goto err; + usleep_range(1000, 1500); + + hw_reboot_normal(info); + usleep_range(1000, 1500); + dev_info(&client->dev, "fw download done...\n"); + return 0; + +err: + dev_err(&client->dev, "fw download failed...\n"); + hw_reboot_normal(info); + return ret; +} + +static int get_fw_version(struct mms_ts_info *info) +{ + int ret; + int retries = 3; + + /* this seems to fail sometimes after a reset.. retry a few times */ + do { + ret = i2c_smbus_read_byte_data(info->client, MMS_FW_VERSION); + } while (ret < 0 && retries-- > 0); + + return ret; +} + +static int mms_ts_enable(struct mms_ts_info *info) +{ + mutex_lock(&info->lock); + if (info->enabled) + goto out; + /* wake up the touch controller. */ + i2c_smbus_write_byte_data(info->client, 0, 0); + usleep_range(3000, 5000); + info->enabled = true; + enable_irq(info->irq); +out: + mutex_unlock(&info->lock); + return 0; +} + +static void mms_ts_disable(struct mms_ts_info *info) +{ + mutex_lock(&info->lock); + if (!info->enabled) + goto out; + disable_irq(info->irq); + i2c_smbus_write_byte_data(info->client, MMS_MODE_CONTROL, 0); + usleep_range(10000, 12000); + info->enabled = false; +out: + mutex_unlock(&info->lock); +} + +static int mms_ts_input_open(struct input_dev *dev) +{ + struct mms_ts_info *info = input_get_drvdata(dev); + + return mms_ts_enable(info); +} + +static void mms_ts_input_close(struct input_dev *dev) +{ + struct mms_ts_info *info = input_get_drvdata(dev); + mms_ts_disable(info); +} + +static int mms_ts_fw_load(const struct firmware *fw, void *context) +{ + struct mms_ts_info *info = context; + struct i2c_client *client = info->client; + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); + int ret = 0; + int ver; + int retries = 3; + struct mms_fw_image *fw_img; + + ver = get_fw_version(info); + if (ver < 0) { + ver = 0; + dev_err(&client->dev, + "can't read fw version, controller dead? forcing reflash\n"); + } + + fw_img = (struct mms_fw_image *)fw->data; + if (fw_img->hdr_len != sizeof(struct mms_fw_image) || + fw_img->data_len + fw_img->hdr_len != fw->size || + fw_img->hdr_ver != FW_HEADER_VERSION) { + dev_err(&client->dev, + "firmware image invalid\n"); + return -EINVAL; + } + + if (ver == fw_img->fw_ver && !mms_force_reflash) { + dev_info(&client->dev, + "firmware is up-to-date, version 0x%02x\n", ver); + return 0; + } + + dev_info(&client->dev, + "need fw update: current version 0x%02x, 0x%02x to flash%s\n", + ver, fw_img->fw_ver, mms_force_reflash ? " forced" : ""); + + while (retries--) { + i2c_lock_adapter(adapter); + info->pdata.mux_fw_flash(true); + + ret = fw_download(info, fw_img->data, fw_img->data_len); + + info->pdata.mux_fw_flash(false); + i2c_unlock_adapter(adapter); + + if (ret < 0) { + dev_err(&client->dev, + "error updating firmware to version 0x%02x\n", + fw_img->fw_ver); + if (retries) + dev_err(&client->dev, "retrying flashing\n"); + continue; + } + + ver = get_fw_version(info); + if (ver != fw_img->fw_ver) { + dev_err(&client->dev, + "fw update succeeded, but version mismatches " + "(0x%x != 0x%x)\n", + ver, fw_img->fw_ver); + if (retries) + dev_err(&client->dev, "retrying flashing\n"); + continue; + } + + dev_info(&client->dev, "fw update done. ver = 0x%02x\n", ver); + break; + } + if (ret < 0) { + dev_err(&client->dev, "could not flash firmware, ran out of retries\n"); + return ret; + } + + return 0; +} + +static int __devinit mms_ts_config(struct mms_ts_info *info) +{ + struct i2c_client *client = info->client; + int ret; + char path[32]; + const struct firmware *fw; + + mms_pwr_on_reset(info); + + snprintf(path, sizeof(path), "melfas/mms144_ts_rev%i.fw", + info->pdata.fpcb_version); + ret = request_firmware(&fw, path, &client->dev); + if (ret) { + dev_err(&client->dev, "error requesting firmware %s\n", path); + return ret; + } + + ret = mms_ts_fw_load(fw, info); + if (ret < 0) + dev_err(&client->dev, "failed to flash firmware %s\n", path); + + release_firmware(fw); + return ret; +} + +static int __devinit mms_ts_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); + struct mms144_platform_data *pdata = client->dev.platform_data; + struct mms_ts_info *info; + struct input_dev *input_dev; + int ret = 0; + + if (!pdata || !pdata->max_x || !pdata->max_y || !pdata->mux_fw_flash) { + dev_err(&client->dev, "invalid platform data\n"); + return -EINVAL; + } + if (!client->irq) { + dev_err(&client->dev, "invalid IRQ number\n"); + return -EINVAL; + } + + if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) + return -EIO; + + info = kzalloc(sizeof(struct mms_ts_info), GFP_KERNEL); + input_dev = input_allocate_device(); + if (!info || !input_dev) { + dev_err(&client->dev, "Failed to allocate memory\n"); + goto err_alloc; + } + + info->client = client; + info->irq = client->irq; + info->input_dev = input_dev; + memcpy(&info->pdata, pdata, sizeof(*pdata)); + mutex_init(&info->lock); + + snprintf(info->phys, sizeof(info->phys), + "%s/input0", dev_name(&client->dev)); + input_dev->name = "Melfas MMS144 Touchscreen"; + input_dev->phys = info->phys; + input_dev->id.bustype = BUS_I2C; + input_dev->dev.parent = &client->dev; + input_dev->open = mms_ts_input_open; + input_dev->close = mms_ts_input_close; + + __set_bit(EV_SYN, input_dev->evbit); + __set_bit(EV_ABS, input_dev->evbit); + input_set_abs_params(input_dev, ABS_MT_POSITION_X, + 0, info->pdata.max_x, 0, 0); + input_set_abs_params(input_dev, ABS_MT_POSITION_Y, + 0, info->pdata.max_y, 0, 0); + input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, MAX_PRESSURE, 0, 0); + input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, MAX_WIDTH, 0, 0); + ret = input_mt_init_slots(input_dev, MAX_FINGERS, INPUT_MT_DIRECT); + if (ret < 0) { + dev_err(&client->dev, "Failed to allocate input slots\n"); + goto err_alloc; + } + + input_set_drvdata(input_dev, info); + + ret = input_register_device(input_dev); + if (ret) { + dev_err(&client->dev, "failed to register input dev (%d)\n", + ret); + goto err_reg_input_dev; + } + + i2c_set_clientdata(client, info); + + ret = mms_ts_config(info); + if (ret) + goto err_config; + + ret = request_threaded_irq(client->irq, NULL, mms_ts_interrupt, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "mms144", info); + if (ret < 0) { + dev_err(&client->dev, "Failed to register interrupt\n"); + goto err_req_irq; + } + disable_irq(client->irq); + + return 0; + +err_req_irq: +err_config: + input_unregister_device(input_dev); + input_dev = NULL; +err_reg_input_dev: + if (input_dev) + input_mt_destroy_slots(input_dev); +err_alloc: + input_free_device(input_dev); + kfree(info); + return ret; +} + +static int __devexit mms_ts_remove(struct i2c_client *client) +{ + struct mms_ts_info *info = i2c_get_clientdata(client); + + free_irq(info->irq, info); + input_unregister_device(info->input_dev); + kfree(info); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int mms_ts_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct mms_ts_info *info = i2c_get_clientdata(client); + struct input_dev *input_dev = info->input_dev; + int i; + + /* TODO: turn off the power (set vdd_en to 0) to the touchscreen + * on suspend + */ + + mutex_lock(&input_dev->mutex); + if (input_dev->users) + mms_ts_disable(info); + mutex_unlock(&input_dev->mutex); + + for (i = 0; i < MAX_FINGERS; i++) { + input_mt_slot(input_dev, i); + input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, false); + } + input_mt_report_pointer_emulation(input_dev, false); + input_sync(input_dev); + + return 0; +} + +static int mms_ts_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct mms_ts_info *info = i2c_get_clientdata(client); + struct input_dev *input_dev = info->input_dev; + int ret = 0; + + mutex_lock(&input_dev->mutex); + if (input_dev->users) + ret = mms_ts_enable(info); + mutex_unlock(&input_dev->mutex); + + return ret; +} +#endif + +static SIMPLE_DEV_PM_OPS(mms_ts_pm_ops, mms_ts_suspend, mms_ts_resume); + +static const struct i2c_device_id mms_ts_id[] = { + { "mms144", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, mms_ts_id); + +static struct i2c_driver mms_ts_driver = { + .probe = mms_ts_probe, + .remove = __devexit_p(mms_ts_remove), + .driver = { + .name = "mms144", + .pm = &mms_ts_pm_ops, + }, + .id_table = mms_ts_id, +}; + +module_i2c_driver(mms_ts_driver); + +/* Module information */ +MODULE_DESCRIPTION("MELFAS mms144 touchscreen driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/i2c/mms144.h b/include/linux/i2c/mms144.h new file mode 100644 index 0000000..d60f106 --- /dev/null +++ b/include/linux/i2c/mms144.h @@ -0,0 +1,34 @@ +/* + * mms144.h - Platform data for Melfas MMS144 touch driver + * + * Copyright (C) 2011 Google Inc. + * Author: Dima Zavin <[email protected]> + * + * + * 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. + * + */ + +#ifndef __LINUX_MMS144_H +#define __LINUX_MMS144_H + +struct mms144_platform_data { + int max_x; + int max_y; + + bool invert_x; + bool invert_y; + + int gpio_sda; + int gpio_scl; + int gpio_resetb; + int gpio_vdd_en; + + int (*mux_fw_flash)(bool to_gpios); + int fpcb_version; +}; + +#endif /* __LINUX_MMS144_H */ -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
