From mboxrd@z Thu Jan 1 00:00:00 1970 From: "jeffrey.lin" Subject: [PATCH] driver: input :touchscreen : add Raydium I2C touch driver Date: Tue, 15 Mar 2016 16:44:17 +0800 Message-ID: <1458031457-1315-1-git-send-email-jeffrey.lin@rad-ic.com> Return-path: Sender: linux-input-owner@vger.kernel.org To: pawel.moll@arm.com, mark.rutland@arm.com, jc+devicetree@hellion.org.uk, galak@codeaurora.org, treding@nvidia.com, inki.dae@samsung.com, djkurtz@chromium.org, dusonlin@emc.com.tw, ajaykumar.rs@samsung.com, jeesw@melfas.com, dmitry.torokhov@gmail.com, rydberg@euromail.se, grant.likely@linaro.org, robh+dt@kernel.org, bleung@chromium.org, scott.liu@emc.com.tw Cc: jeffrey.lin@rad-ic.com, roger.yang@rad-ic.com, KP.li@rad-ic.com, albert.shieh@rad-ic.com, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, devicetree@vger.kernel.org List-Id: devicetree@vger.kernel.org Raydium I2C touch driver. Signed-off-by: jeffrey.lin --- .../devicetree/bindings/input/raydium_i2c_ts.txt | 23 + .../devicetree/bindings/vendor-prefixes.txt | 1 + drivers/input/touchscreen/Kconfig | 12 + drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/raydium_i2c_ts.c | 932 +++++++++++++++++++++ 5 files changed, 969 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/raydium_i2c_ts.txt create mode 100644 drivers/input/touchscreen/raydium_i2c_ts.c diff --git a/Documentation/devicetree/bindings/input/raydium_i2c_ts.txt b/Documentation/devicetree/bindings/input/raydium_i2c_ts.txt new file mode 100644 index 0000000..329864d --- /dev/null +++ b/Documentation/devicetree/bindings/input/raydium_i2c_ts.txt @@ -0,0 +1,23 @@ +Raydium I2C touchscreen + +Required properties: +- compatible: + "raydium,rm31100" + +- reg: The I2C address of the device +- interrupts: interrupt to which the chip is connected + See ../interrupt-controller/interrupts.txt +Optional property: + - avdd-supply : Analog power supply needed to power device + - vccio-supply: IO Power source + +Example: + + raydium_i2c@0x39 { + compatible = "raydium,rm31100"; + avdd-supply = <&pm8226_l19>; + vccio-supply = <&pm8226_lvs1>; + reg = <0x39>; + interrupt-parent = <&gpio>; + interrupts = <0x0 IRQ_TYPE_EDGE_FALLING>; + }; diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index af49e0f..5b6224b 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -126,6 +126,7 @@ radxa Radxa raidsonic RaidSonic Technology GmbH ralink Mediatek/Ralink Technology Corp. ramtron Ramtron International +raydium Raydium Semiconductor Corp. realtek Realtek Semiconductor Corp. renesas Renesas Electronics Corporation ricoh Ricoh Co. Ltd. diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index 3f3f6ee..ab28721 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -915,6 +915,18 @@ config TOUCHSCREEN_PCAP To compile this driver as a module, choose M here: the module will be called pcap_ts. +config TOUCHSCREEN_RM_TS + tristate "Raydium I2C Touchscreen" + depends on I2C + help + Say Y here if you have Raydium series I2C touchscreen, + such as RM31100 , connected to your system. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called raydium_i2c_ts. + config TOUCHSCREEN_ST1232 tristate "Sitronix ST1232 touchscreen controllers" depends on I2C diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 4941f2d..99e08cf 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -55,6 +55,7 @@ obj-$(CONFIG_TOUCHSCREEN_USB_COMPOSITE) += usbtouchscreen.o obj-$(CONFIG_TOUCHSCREEN_PCAP) += pcap_ts.o obj-$(CONFIG_TOUCHSCREEN_PENMOUNT) += penmount.o obj-$(CONFIG_TOUCHSCREEN_PIXCIR) += pixcir_i2c_ts.o +obj-$(CONFIG_TOUCHSCREEN_RM_TS) += raydium_i2c_ts.o obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2410_ts.o obj-$(CONFIG_TOUCHSCREEN_ST1232) += st1232.o obj-$(CONFIG_TOUCHSCREEN_STMPE) += stmpe-ts.o diff --git a/drivers/input/touchscreen/raydium_i2c_ts.c b/drivers/input/touchscreen/raydium_i2c_ts.c new file mode 100644 index 0000000..69a0388 --- /dev/null +++ b/drivers/input/touchscreen/raydium_i2c_ts.c @@ -0,0 +1,932 @@ +/* + * Raydium touchscreen I2C driver. + * + * Copyright (C) 2012-2014, Raydium Semiconductor Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2, and only version 2, as published by the + * Free Software Foundation. + * + * 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. + * + * Raydium reserves the right to make changes without further notice + * to the materials described herein. Raydium does not assume any + * liability arising out of the application described herein. + * + * Contact Raydium Semiconductor Corporation at www.rad-ic.com + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Device, Driver information */ +#define DEVICE_NAME "rm31100" + +/* Slave I2C mode*/ +#define RM_BOOT_BLDR 0x02 +#define RM_BOOT_MAIN 0x03 + +/*I2C command */ +#define CMD_QUERY_BANK 0x2B +#define CMD_DATA_BANK 0x4D +#define CMD_ENTER_SLEEP 0x4E +#define CMD_BOOT_ACK 0x0A +#define CMD_BOOT_WRT 0x5B +#define CMD_BOOT_CHK 0x0C +#define CMD_BANK_SWITCH 0xAA + +/* Touch relative info */ +#define MAX_RETRIES 3 +#define MAX_FW_UPDATE_RETRIES 30 +#define MAX_TOUCH_NUM 10 +#define MAX_PACKET_SIZE 60 +#define BOOT_DELAY_MS 100 + +#define RAYDIUM_FW_PAGESIZE 128 +#define RAYDIUM_POWERON_DELAY_USEC 500 +#define RAYDIUM_RESET_DELAY_MSEC 50 + +#define ADDR_INDEX 0x03 +#define DATA_INDEX 0x04 + +#define HEADER_SIZE 4 + +enum raydium_boot_mode { + RAYDIUM_TS_MAIN = 0, + RAYDIUM_TS_BLDR, +}; + +enum raydium_abs_idx { + POS_STATE = 0,/*1:touch, 0:no touch*/ + POS_X, + POS_Y = 3, + POS_PRESSURE, + WIDTH_X, + WIDTH_Y, +}; + +struct raydium_info { + u32 hw_ver; /*device ver, __le32*/ + u8 main_ver; + u8 sub_ver; + u16 ft_ver; /*test ver, __le16*/ + u8 x_num; + u8 y_num; + u16 x_max; /*disp reso, __le16*/ + u16 y_max; /*disp reso, __le16*/ + u8 x_res; /* units/mm */ + u8 y_res; /* units/mm */ +}; + +struct raydium_object { + u32 data_bank_addr; + u8 pkg_size; + u8 tp_info_size; +}; + +/* struct raydium_data - represents state of Raydium touchscreen device */ +struct raydium_data { + struct i2c_client *client; + struct input_dev *input; + + struct regulator *avdd; + struct regulator *vccio; + struct gpio_desc *reset_gpio; + + u32 query_bank_info; + + struct raydium_info info; + struct raydium_object obj; + enum raydium_boot_mode boot_mode; + + struct mutex sysfs_mutex; + struct completion cmd_done; + + bool wake_irq_enabled; +}; + +static int raydium_i2c_send(struct i2c_client *client, + u8 addr, u8 *data, size_t len) +{ + u8 buf[MAX_PACKET_SIZE + 1]; + int tries = 0; + + if (len > MAX_PACKET_SIZE) + return -EINVAL; + + buf[0] = addr; + memcpy(&buf[1], data, len); + + do { + if (i2c_master_send(client, buf, len + 1) == (len + 1)) + return 0; + msleep(20); + } while (++tries < MAX_RETRIES); + + dev_err(&client->dev, "%s: i2c send failed\n", __func__); + + return -EIO; +} + +static int raydium_i2c_read(struct i2c_client *client, + u8 addr, size_t len, void *data) +{ + struct i2c_msg xfer[2]; + int ret; + + /* Write register */ + xfer[0].addr = client->addr; + xfer[0].flags = 0; + xfer[0].len = 1; + xfer[0].buf = &addr; + + /* Read data */ + xfer[1].addr = client->addr; + xfer[1].flags = I2C_M_RD; + xfer[1].len = len; + xfer[1].buf = data; + + ret = i2c_transfer(client->adapter, xfer, ARRAY_SIZE(xfer)); + if (ret < 0) + return ret; + + if (ret != ARRAY_SIZE(xfer)) + return -EIO; + + return 0; +} + +static int raydium_i2c_read_message(struct i2c_client *client, + u32 addr, size_t len, void *data) +{ + u16 pkg_size, use_len; + u8 buf[HEADER_SIZE], idx_i; + int error; + + use_len = len; + idx_i = 0; + while (use_len > 0) { + pkg_size = (use_len < MAX_PACKET_SIZE) ? + use_len : MAX_PACKET_SIZE; + + put_unaligned_be32(addr, buf); + + /*set data bank*/ + error = raydium_i2c_send(client, CMD_BANK_SWITCH, + (u8 *)buf, HEADER_SIZE); + /*read potints data*/ + if (!error) + error = raydium_i2c_read(client, buf[ADDR_INDEX], + pkg_size, + data + idx_i*MAX_PACKET_SIZE); + + pkg_size += MAX_PACKET_SIZE; + addr += MAX_PACKET_SIZE; + use_len = (use_len < MAX_PACKET_SIZE) ? + 0 : (use_len - MAX_PACKET_SIZE); + idx_i++; + } + + return error; +} + +static int raydium_i2c_send_message(struct i2c_client *client, + size_t len, void *data) +{ + int error; + __le32 cmd; + + cmd = get_unaligned_le32(data); + + /*set data bank*/ + error = raydium_i2c_send(client, CMD_BANK_SWITCH, (u8 *)&cmd, + HEADER_SIZE); + + /*send message*/ + if (!error) + error = raydium_i2c_send(client, ((u8 *)data)[ADDR_INDEX], + data + DATA_INDEX, len); + + return error; +} + +static int raydium_i2c_sw_reset(struct i2c_client *client) +{ + static const u8 soft_rst_cmd[] = {0x40, 0x00, 0x00, 0x04, 0x01}; + int error; + + error = raydium_i2c_send_message(client, ARRAY_SIZE(soft_rst_cmd), + (void *)soft_rst_cmd); + if (error) { + dev_err(&client->dev, "software reset failed: %d\n", error); + return error; + } + + msleep(RAYDIUM_RESET_DELAY_MSEC); + + return 0; +} + +static int raydium_i2c_query_ts_info(struct raydium_data *ts) +{ + struct i2c_client *client = ts->client; + int error, retry_cnt; + + for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) { + error = raydium_i2c_read(client, CMD_DATA_BANK, + sizeof(ts->obj), (void *)&ts->obj); + ts->obj.data_bank_addr = + get_unaligned_le32(&ts->obj.data_bank_addr); + + if (!error) { + error = raydium_i2c_read(client, CMD_QUERY_BANK, + sizeof(ts->query_bank_info), + (void *)&ts->query_bank_info); + if (!error) { + error = raydium_i2c_read_message(client, + ts->query_bank_info, sizeof(ts->info), + (void *)&ts->info); + + ts->info.hw_ver = + get_unaligned_le32(&ts->info.hw_ver); + ts->info.ft_ver = + get_unaligned_le16(&ts->info.ft_ver); + ts->info.x_max = + get_unaligned_le16(&ts->info.x_max); + ts->info.y_max = + get_unaligned_le16(&ts->info.y_max); + + return 0; + } + } + } + dev_err(&client->dev, "Get touch data failed: %d\n", error); + + return -EINVAL; +} + +static int raydium_i2c_fastboot(struct i2c_client *client) +{ + static const u8 boot_cmd[] = { 0x50, 0x00, 0x06, 0x20 }; + u8 buf[HEADER_SIZE]; + int error; + + error = raydium_i2c_read_message(client, + get_unaligned_be32(boot_cmd), + sizeof(boot_cmd), buf); + + if (!error) { + if (buf[0] == RM_BOOT_BLDR) { + dev_dbg(&client->dev, "boot in fastboot mode\n"); + return -EINVAL; + } + dev_dbg(&client->dev, "boot success -- 0x%x\n", client->addr); + return 0; + } + + dev_err(&client->dev, "boot failed: %d\n", error); + + return error; +} + +static int raydium_i2c_initialize(struct raydium_data *ts) +{ + struct i2c_client *client = ts->client; + int error, retry_cnt; + static const u8 recov_packet[] = { 0x04, 0x81 }; + u8 buf[HEADER_SIZE]; + + for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) { + error = raydium_i2c_fastboot(client); + if (error) { + /* Continue initializing if it's the last try */ + if (retry_cnt < MAX_RETRIES - 1) + continue; + } + /* Wait for Hello packet */ + msleep(BOOT_DELAY_MS); + + error = raydium_i2c_read(client, recov_packet[0], 1, + (void *)buf); + if (error) { + dev_err(&client->dev, + "failed to read 'hello' packet: %d\n", error); + } else if (buf[0] == recov_packet[1]) { + ts->boot_mode = RAYDIUM_TS_MAIN; + break; + } + } + + if (error) + ts->boot_mode = RAYDIUM_TS_BLDR; + else + raydium_i2c_query_ts_info(ts); + + return error; +} + +static int raydium_i2c_fw_write_page(struct i2c_client *client, + const void *page) +{ + static const u8 ack_ok[] = { 0x55, 0xAA }; + u8 buf[2]; + int retry; + int error; + + for (retry = 0; retry < MAX_FW_UPDATE_RETRIES; retry++) { + error = raydium_i2c_send(client, CMD_BOOT_WRT, + (u8 *)page, RAYDIUM_FW_PAGESIZE); + if (error) { + dev_err(&client->dev, + "BLDR Write Page failed: %d\n", error); + continue; + } + + error = raydium_i2c_read(client, CMD_BOOT_CHK, sizeof(ack_ok), + (void *)buf); + if (error) { + dev_err(&client->dev, + "BLDR Ack read failed: %d\n", error); + return error; + } + + if (!memcmp(buf, ack_ok, sizeof(ack_ok))) + return 0; + + error = -EIO; + dev_err(&client->dev, + "BLDR Get Ack Error [%02x:%02x]\n", buf[0], buf[1]); + } + + return error; +} + +static int raydium_i2c_do_update_firmware(struct i2c_client *client, + const struct firmware *fw, + bool force) +{ + static const u8 boot_cmd[] = { 0x50, 0x00, 0x06, 0x20 , RM_BOOT_BLDR }; + static const u8 main_cmd[] = { 0x50, 0x00, 0x06, 0x20, RM_BOOT_MAIN }; + static const u8 boot_ack[] = { 0x55, 0xAA, 0x00, 0xFF }; + u8 buf[HEADER_SIZE]; + int page, n_fw_pages; + int error; + + /* Recovery mode detection! */ + if (!force) { + /* Start boot loader Procedure */ + dev_dbg(&client->dev, "Normal BLDR procedure\n"); + /* switch to mode */ + error = raydium_i2c_send_message(client, 1, (void *)boot_cmd); + if (error) + dev_err(&client->dev, "failed to send boot cmd: %d\n", + error); + msleep(60); + raydium_i2c_sw_reset(client); + msleep(RAYDIUM_RESET_DELAY_MSEC); + error = raydium_i2c_send_message(client, 1, (void *)boot_cmd); + } + + if (error) { + dev_err(&client->dev, "failed to enter fastboot mode: %d\n", + error); + return error; + } + + msleep(20); + + /* check fastboot state */ + error = raydium_i2c_read(client, CMD_BOOT_ACK, + sizeof(boot_ack), (void *)buf); + if (error) { + dev_err(&client->dev, + "failed to read boot ack: %d\n", error); + return error; + } + + if (memcmp(buf, boot_ack, sizeof(boot_ack))) { + dev_err(&client->dev, + "failed to enter fastboot: %*ph (expected %*ph)\n", + (int)sizeof(buf), buf, (int)sizeof(boot_ack), boot_ack); + return -EIO; + } + + dev_info(&client->dev, "successfully entered fastboot mode"); + + n_fw_pages = fw->size / RAYDIUM_FW_PAGESIZE; + dev_dbg(&client->dev, "BLDR Pages = %d\n", n_fw_pages); + + for (page = 0; page < n_fw_pages; page++) { + error = raydium_i2c_fw_write_page(client, + fw->data + page * RAYDIUM_FW_PAGESIZE); + if (error) { + dev_err(&client->dev, + "failed to write FW page %d: %d\n", + page, error); + return error; + } + } + error = raydium_i2c_send_message(client, 1, (void *)main_cmd); + msleep(20); + raydium_i2c_sw_reset(client); + dev_info(&client->dev, "firmware update completed\n"); + + return 0; +} + +static int raydium_i2c_fw_update(struct raydium_data *ts) +{ + struct i2c_client *client = ts->client; + const struct firmware *fw; + char *fw_name; + int error; + + fw_name = kasprintf(GFP_KERNEL, "raydium_i2c_%04x.bin", + ts->info.hw_ver & 0xFFFF); + if (!fw_name) + return -ENOMEM; + + dev_info(&client->dev, "requesting fw name = %s\n", fw_name); + error = request_firmware(&fw, fw_name, &client->dev); + kfree(fw_name); + if (error) { + dev_err(&client->dev, "failed to request firmware: %d\n", + error); + return error; + } + + if (fw->size % RAYDIUM_FW_PAGESIZE) { + dev_err(&client->dev, "invalid firmware length: %zu\n", + fw->size); + error = -EINVAL; + goto out; + } + + disable_irq(client->irq); + error = raydium_i2c_do_update_firmware(client, fw, + ts->boot_mode == RAYDIUM_TS_BLDR); + if (error) { + dev_err(&client->dev, "firmware update failed: %d\n", error); + ts->boot_mode = RAYDIUM_TS_BLDR; + goto out_enable_irq; + } + error = raydium_i2c_initialize(ts); + if (error) { + dev_err(&client->dev, + "failed to initialize device after firmware update: %d\n", + error); + ts->boot_mode = RAYDIUM_TS_BLDR; + goto out_enable_irq; + } + + ts->boot_mode = RAYDIUM_TS_MAIN; + +out_enable_irq: + enable_irq(client->irq); + msleep(100); +out: + release_firmware(fw); + return error; +} + +static void raydium_mt_event(struct raydium_data *ts) +{ + u8 data[MAX_PACKET_SIZE]; + int error, i; + int x, y, f_state, pressure, wx, wy; + + error = raydium_i2c_read_message(ts->client, ts->obj.data_bank_addr, + ts->obj.pkg_size, (void *)data); + + if (error < 0) { + dev_err(&ts->client->dev, "%s: failed to read data: %d\n", + __func__, error); + return; + } + + for (i = 0; i < MAX_TOUCH_NUM; i++) { + f_state = (data + i * ts->obj.tp_info_size)[POS_STATE]; + pressure = (data + i * ts->obj.tp_info_size)[POS_PRESSURE]; + wx = (data + i * ts->obj.tp_info_size)[WIDTH_X]; + wy = (data + i * ts->obj.tp_info_size)[WIDTH_Y]; + + input_mt_slot(ts->input, i); + input_mt_report_slot_state(ts->input, + MT_TOOL_FINGER, f_state != 0); + + if (!f_state) + continue; + x = get_unaligned_le16(&data[i * ts->obj.tp_info_size + POS_X]); + y = get_unaligned_le16(&data[i * ts->obj.tp_info_size + POS_Y]); + + input_report_abs(ts->input, ABS_MT_POSITION_X, x); + input_report_abs(ts->input, ABS_MT_POSITION_Y, y); + input_report_abs(ts->input, ABS_MT_PRESSURE, pressure); + input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, + max(wx, wy)); + input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, + min(wx, wy)); + } + + input_mt_sync_frame(ts->input); + input_sync(ts->input); +} + +static irqreturn_t raydium_i2c_irq(int irq, void *_dev) +{ + struct raydium_data *ts = _dev; + + if (ts->boot_mode != RAYDIUM_TS_BLDR) + raydium_mt_event(ts); + + return IRQ_HANDLED; +} + +static ssize_t write_update_fw(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct raydium_data *ts = dev_get_drvdata(dev); + int error; + + error = mutex_lock_interruptible(&ts->sysfs_mutex); + if (error) + return error; + + error = raydium_i2c_fw_update(ts); + dev_dbg(dev, "firmware update result: %d\n", error); + + mutex_unlock(&ts->sysfs_mutex); + return error ?: count; +} + +static ssize_t raydium_bootmode_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct raydium_data *ts = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", ts->boot_mode == RAYDIUM_TS_MAIN ? + "Normal" : "Recovery"); +} + +static ssize_t raydium_fw_ver_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct raydium_data *ts = dev_get_drvdata(dev); + + return sprintf(buf, "%d.%d\n", ts->info.main_ver, ts->info.sub_ver); +} + +static ssize_t raydium_hw_ver_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct raydium_data *ts = dev_get_drvdata(dev); + + return sprintf(buf, "0x%04x\n", ts->info.hw_ver); +} + +static DEVICE_ATTR(fw_version, S_IRUGO, raydium_fw_ver_show, NULL); +static DEVICE_ATTR(hw_version, S_IRUGO, raydium_hw_ver_show, NULL); +static DEVICE_ATTR(boot_mode, S_IRUGO, raydium_bootmode_show, NULL); +static DEVICE_ATTR(update_fw, S_IWUSR, NULL, write_update_fw); + +static struct attribute *raydium_attributes[] = { + &dev_attr_update_fw.attr, + &dev_attr_boot_mode.attr, + &dev_attr_fw_version.attr, + &dev_attr_hw_version.attr, + NULL +}; + +static struct attribute_group raydium_attribute_group = { + .attrs = raydium_attributes, +}; + +static void raydium_i2c_remove_sysfs_group(void *_data) +{ + struct raydium_data *ts = _data; + + sysfs_remove_group(&ts->client->dev.kobj, &raydium_attribute_group); +} + +static int raydium_i2c_power_on(struct raydium_data *ts) +{ + int error; + + if (IS_ERR_OR_NULL(ts->reset_gpio)) + return 0; + + gpiod_set_value_cansleep(ts->reset_gpio, 1); + + error = regulator_enable(ts->avdd); + if (error) { + dev_err(&ts->client->dev, + "failed to enable avdd regulator: %d\n", error); + goto release_reset_gpio; + } + + error = regulator_enable(ts->vccio); + if (error) { + regulator_disable(ts->avdd); + dev_err(&ts->client->dev, + "failed to enable vccio regulator: %d\n", error); + goto release_reset_gpio; + } + + udelay(RAYDIUM_POWERON_DELAY_USEC); + +release_reset_gpio: + gpiod_set_value_cansleep(ts->reset_gpio, 0); + + if (error) + return error; + + msleep(RAYDIUM_RESET_DELAY_MSEC); + + return 0; +} + +static void raydium_i2c_power_off(void *_data) +{ + struct raydium_data *ts = _data; + + if (!IS_ERR_OR_NULL(ts->reset_gpio)) { + gpiod_set_value_cansleep(ts->reset_gpio, 1); + regulator_disable(ts->vccio); + regulator_disable(ts->avdd); + } +} + +static int raydium_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + union i2c_smbus_data dummy; + struct raydium_data *ts; + unsigned long irqflags; + int error; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + dev_err(&client->dev, + "%s: i2c check functionality error\n", DEVICE_NAME); + return -ENXIO; + } + + ts = devm_kzalloc(&client->dev, sizeof(struct raydium_data), + GFP_KERNEL); + if (!ts) + return -ENOMEM; + + mutex_init(&ts->sysfs_mutex); + init_completion(&ts->cmd_done); + + ts->client = client; + i2c_set_clientdata(client, ts); + + ts->avdd = devm_regulator_get(&client->dev, "avdd"); + if (IS_ERR(ts->avdd)) { + error = PTR_ERR(ts->avdd); + if (error != -EPROBE_DEFER) + dev_err(&client->dev, + "Failed to get 'avdd' regulator: %d\n", error); + return error; + } + + ts->vccio = devm_regulator_get(&client->dev, "vccio"); + if (IS_ERR(ts->vccio)) { + error = PTR_ERR(ts->vccio); + if (error != -EPROBE_DEFER) + dev_err(&client->dev, + "Failed to get 'vccio' regulator: %d\n", error); + return error; + } + + ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(ts->reset_gpio)) { + error = PTR_ERR(ts->reset_gpio); + if (error != -EPROBE_DEFER) { + dev_err(&client->dev, + "failed to get reset gpio: %d\n", error); + return error; + } + } + + error = raydium_i2c_power_on(ts); + if (error) + return error; + + error = devm_add_action(&client->dev, raydium_i2c_power_off, ts); + if (error) { + dev_err(&client->dev, + "failed to install power off action: %d\n", error); + raydium_i2c_power_off(ts); + return error; + } + + /* Make sure there is something at this address */ + if (i2c_smbus_xfer(client->adapter, client->addr, 0, + I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) { + dev_err(&client->dev, "nothing at this address\n"); + return -ENXIO; + } + + error = raydium_i2c_initialize(ts); + if (error) { + dev_err(&client->dev, "failed to initialize: %d\n", error); + return error; + } + + ts->input = devm_input_allocate_device(&client->dev); + if (!ts->input) { + dev_err(&client->dev, "Failed to allocate input device\n"); + return -ENOMEM; + } + + ts->input->name = "Raydium Touchscreen"; + ts->input->id.bustype = BUS_I2C; + + __set_bit(BTN_TOUCH, ts->input->keybit); + __set_bit(EV_ABS, ts->input->evbit); + __set_bit(EV_KEY, ts->input->evbit); + + /* Multitouch input params setup */ + input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, + ts->info.x_max, 0, 0); + input_set_abs_params(ts->input, ABS_MT_POSITION_Y, + 0, ts->info.y_max, 0, 0); + input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); + input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0); + input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->info.x_res); + input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->info.y_res); + + input_mt_init_slots(ts->input, MAX_TOUCH_NUM, 0); + + input_set_drvdata(ts->input, ts); + + error = input_mt_init_slots(ts->input, MAX_TOUCH_NUM, + INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); + if (error) { + dev_err(&client->dev, + "failed to initialize MT slots: %d\n", error); + return error; + } + + error = input_register_device(ts->input); + if (error) { + dev_err(&client->dev, + "unable to register input device: %d\n", error); + return error; + } + + error = devm_request_threaded_irq(&client->dev, client->irq, + NULL, raydium_i2c_irq, irqflags | IRQF_ONESHOT, + client->name, ts); + if (error) { + dev_err(&client->dev, "Failed to register interrupt\n"); + return error; + } + + device_init_wakeup(&client->dev, true); + + error = sysfs_create_group(&client->dev.kobj, &raydium_attribute_group); + if (error) { + dev_err(&client->dev, "failed to create sysfs attributes: %d\n", + error); + return error; + } + + error = devm_add_action(&client->dev, + raydium_i2c_remove_sysfs_group, ts); + if (error) { + raydium_i2c_remove_sysfs_group(ts); + dev_err(&client->dev, + "Failed to add sysfs cleanup action: %d\n", error); + return error; + } + + return 0; +} + +static int raydium_i2c_remove(struct i2c_client *client) +{ + struct raydium_data *ts = i2c_get_clientdata(client); + + input_unregister_device(ts->input); + + device_init_wakeup(&client->dev, false); + + mutex_destroy(&ts->sysfs_mutex); + + return 0; +} + +static void __maybe_unused raydium_enter_sleep(struct i2c_client *client) +{ + static const u8 sleep_cmd[] = { 0x5A, 0xff, 0x00, 0x0f }; + int error; + + error = raydium_i2c_send(client, CMD_ENTER_SLEEP, (u8 *)sleep_cmd, + sizeof(sleep_cmd)); + if (error) + dev_err(&client->dev, + "Send sleep failed: %d\n", error); +} + +static int __maybe_unused raydium_i2c_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct raydium_data *ts = i2c_get_clientdata(client); + + /* Command not support in BLDR recovery mode */ + if (ts->boot_mode != RAYDIUM_TS_MAIN) + return -EBUSY; + + disable_irq(client->irq); + + if (device_may_wakeup(dev)) { + raydium_enter_sleep(client); + + ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0); + } else { + raydium_i2c_power_off(ts); + } + + return 0; +} + +static int __maybe_unused raydium_i2c_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct raydium_data *ts = i2c_get_clientdata(client); + + if (device_may_wakeup(dev)) { + if (ts->wake_irq_enabled) + disable_irq_wake(client->irq); + raydium_i2c_sw_reset(client); + } else { + raydium_i2c_power_on(ts); + raydium_i2c_initialize(ts); + } + + enable_irq(client->irq); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops, + raydium_i2c_suspend, raydium_i2c_resume); + +static const struct i2c_device_id raydium_i2c_id[] = { + { DEVICE_NAME, 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, raydium_i2c_id); + +#ifdef CONFIG_ACPI +static const struct acpi_device_id raydium_acpi_id[] = { + { "RAYD0001", 0 }, + { } +}; +MODULE_DEVICE_TABLE(acpi, raydium_acpi_id); +#endif + +#ifdef CONFIG_OF +static const struct of_device_id raydium_of_match[] = { + { .compatible = "raydium,rm31100",}, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, raydium_of_match); +#endif + +static struct i2c_driver raydium_i2c_driver = { + .probe = raydium_i2c_probe, + .remove = raydium_i2c_remove, + .id_table = raydium_i2c_id, + .driver = { + .name = "raydium_ts", + .pm = &raydium_i2c_pm_ops, + .acpi_match_table = ACPI_PTR(raydium_acpi_id), + .of_match_table = of_match_ptr(raydium_of_match), + }, +}; + +module_i2c_driver(raydium_i2c_driver); + +MODULE_AUTHOR("Raydium"); +MODULE_DESCRIPTION("Raydium I2c Touchscreen driver"); +MODULE_LICENSE("GPL v2"); -- 2.1.2