diff options
Diffstat (limited to 'drivers/input/touchscreen')
| -rw-r--r-- | drivers/input/touchscreen/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/input/touchscreen/Makefile | 1 | ||||
| -rw-r--r-- | drivers/input/touchscreen/elants_i2c.c | 8 | ||||
| -rw-r--r-- | drivers/input/touchscreen/imx6ul_tsc.c | 47 | ||||
| -rw-r--r-- | drivers/input/touchscreen/raydium_i2c_ts.c | 131 | ||||
| -rw-r--r-- | drivers/input/touchscreen/s3c2410_ts.c | 37 | ||||
| -rw-r--r-- | drivers/input/touchscreen/stmfts.c | 2 | ||||
| -rw-r--r-- | drivers/input/touchscreen/zinitix.c | 581 |
8 files changed, 717 insertions, 102 deletions
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index 35c867b2d9a7..f012fe746df0 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -1322,4 +1322,16 @@ config TOUCHSCREEN_IQS5XX To compile this driver as a module, choose M here: the module will be called iqs5xx. +config TOUCHSCREEN_ZINITIX + tristate "Zinitix touchscreen support" + depends on I2C + help + Say Y here if you have a touchscreen using Zinitix bt541, + or something similar enough. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called zinitix. + endif diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 30d1e1b42492..6233541e9173 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -111,3 +111,4 @@ obj-$(CONFIG_TOUCHSCREEN_COLIBRI_VF50) += colibri-vf50-ts.o obj-$(CONFIG_TOUCHSCREEN_ROHM_BU21023) += rohm_bu21023.o obj-$(CONFIG_TOUCHSCREEN_RASPBERRYPI_FW) += raspberrypi-ts.o obj-$(CONFIG_TOUCHSCREEN_IQS5XX) += iqs5xx.o +obj-$(CONFIG_TOUCHSCREEN_ZINITIX) += zinitix.o diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c index b0bd5bb079be..50c348297e38 100644 --- a/drivers/input/touchscreen/elants_i2c.c +++ b/drivers/input/touchscreen/elants_i2c.c @@ -90,7 +90,7 @@ /* FW read command, 0x53 0x?? 0x0, 0x01 */ #define E_ELAN_INFO_FW_VER 0x00 #define E_ELAN_INFO_BC_VER 0x10 -#define E_ELAN_INFO_REK 0xE0 +#define E_ELAN_INFO_REK 0xD0 #define E_ELAN_INFO_TEST_VER 0xE0 #define E_ELAN_INFO_FW_ID 0xF0 #define E_INFO_OSR 0xD6 @@ -134,6 +134,7 @@ struct elants_data { u8 bc_version; u8 iap_version; u16 hw_version; + u8 major_res; unsigned int x_res; /* resolution in units/mm */ unsigned int y_res; unsigned int x_max; @@ -459,6 +460,9 @@ static int elants_i2c_query_ts_info(struct elants_data *ts) rows = resp[2] + resp[6] + resp[10]; cols = resp[3] + resp[7] + resp[11]; + /* Get report resolution value of ABS_MT_TOUCH_MAJOR */ + ts->major_res = resp[16]; + /* Process mm_to_pixel information */ error = elants_i2c_execute_command(client, get_osr_cmd, sizeof(get_osr_cmd), @@ -1325,6 +1329,8 @@ static int elants_i2c_probe(struct i2c_client *client, 0, MT_TOOL_PALM, 0, 0); input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->x_res); input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->y_res); + if (ts->major_res > 0) + input_abs_set_res(ts->input, ABS_MT_TOUCH_MAJOR, ts->major_res); touchscreen_parse_properties(ts->input, true, &ts->prop); diff --git a/drivers/input/touchscreen/imx6ul_tsc.c b/drivers/input/touchscreen/imx6ul_tsc.c index 9ed258854349..cd369f9ac5e6 100644 --- a/drivers/input/touchscreen/imx6ul_tsc.c +++ b/drivers/input/touchscreen/imx6ul_tsc.c @@ -315,9 +315,8 @@ static irqreturn_t adc_irq_fn(int irq, void *dev_id) return IRQ_HANDLED; } -static int imx6ul_tsc_open(struct input_dev *input_dev) +static int imx6ul_tsc_start(struct imx6ul_tsc *tsc) { - struct imx6ul_tsc *tsc = input_get_drvdata(input_dev); int err; err = clk_prepare_enable(tsc->adc_clk); @@ -349,16 +348,29 @@ disable_adc_clk: return err; } -static void imx6ul_tsc_close(struct input_dev *input_dev) +static void imx6ul_tsc_stop(struct imx6ul_tsc *tsc) { - struct imx6ul_tsc *tsc = input_get_drvdata(input_dev); - imx6ul_tsc_disable(tsc); clk_disable_unprepare(tsc->tsc_clk); clk_disable_unprepare(tsc->adc_clk); } + +static int imx6ul_tsc_open(struct input_dev *input_dev) +{ + struct imx6ul_tsc *tsc = input_get_drvdata(input_dev); + + return imx6ul_tsc_start(tsc); +} + +static void imx6ul_tsc_close(struct input_dev *input_dev) +{ + struct imx6ul_tsc *tsc = input_get_drvdata(input_dev); + + imx6ul_tsc_stop(tsc); +} + static int imx6ul_tsc_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -509,12 +521,8 @@ static int __maybe_unused imx6ul_tsc_suspend(struct device *dev) mutex_lock(&input_dev->mutex); - if (input_dev->users) { - imx6ul_tsc_disable(tsc); - - clk_disable_unprepare(tsc->tsc_clk); - clk_disable_unprepare(tsc->adc_clk); - } + if (input_dev->users) + imx6ul_tsc_stop(tsc); mutex_unlock(&input_dev->mutex); @@ -530,22 +538,11 @@ static int __maybe_unused imx6ul_tsc_resume(struct device *dev) mutex_lock(&input_dev->mutex); - if (input_dev->users) { - retval = clk_prepare_enable(tsc->adc_clk); - if (retval) - goto out; - - retval = clk_prepare_enable(tsc->tsc_clk); - if (retval) { - clk_disable_unprepare(tsc->adc_clk); - goto out; - } - - retval = imx6ul_tsc_init(tsc); - } + if (input_dev->users) + retval = imx6ul_tsc_start(tsc); -out: mutex_unlock(&input_dev->mutex); + return retval; } diff --git a/drivers/input/touchscreen/raydium_i2c_ts.c b/drivers/input/touchscreen/raydium_i2c_ts.c index fe245439adee..e694a9b2b1e5 100644 --- a/drivers/input/touchscreen/raydium_i2c_ts.c +++ b/drivers/input/touchscreen/raydium_i2c_ts.c @@ -51,6 +51,7 @@ /* Touch relative info */ #define RM_MAX_RETRIES 3 +#define RM_RETRY_DELAY_MS 20 #define RM_MAX_TOUCH_NUM 10 #define RM_BOOT_DELAY_MS 100 @@ -136,83 +137,82 @@ struct raydium_data { bool wake_irq_enabled; }; -static int raydium_i2c_send(struct i2c_client *client, - u8 addr, const void *data, size_t len) +static int raydium_i2c_xfer(struct i2c_client *client, + u32 addr, void *data, size_t len, bool is_read) { - u8 *buf; - int tries = 0; - int ret; - - buf = kmalloc(len + 1, GFP_KERNEL); - if (!buf) - return -ENOMEM; - - buf[0] = addr; - memcpy(buf + 1, data, len); - - do { - ret = i2c_master_send(client, buf, len + 1); - if (likely(ret == len + 1)) - break; - - msleep(20); - } while (++tries < RM_MAX_RETRIES); - - kfree(buf); - - if (unlikely(ret != len + 1)) { - if (ret >= 0) - ret = -EIO; - dev_err(&client->dev, "%s failed: %d\n", __func__, ret); - return ret; - } + struct raydium_bank_switch_header { + u8 cmd; + __be32 be_addr; + } __packed header = { + .cmd = RM_CMD_BANK_SWITCH, + .be_addr = cpu_to_be32(addr), + }; - return 0; -} + u8 reg_addr = addr & 0xff; -static int raydium_i2c_read(struct i2c_client *client, - u8 addr, void *data, size_t len) -{ struct i2c_msg xfer[] = { { .addr = client->addr, + .len = sizeof(header), + .buf = (u8 *)&header, + }, + { + .addr = client->addr, .len = 1, - .buf = &addr, + .buf = ®_addr, }, { .addr = client->addr, - .flags = I2C_M_RD, .len = len, .buf = data, + .flags = is_read ? I2C_M_RD : 0, } }; + + /* + * If address is greater than 255, then RM_CMD_BANK_SWITCH needs to be + * sent first. Else, skip the header i.e. xfer[0]. + */ + int xfer_start_idx = (addr > 0xff) ? 0 : 1; + size_t xfer_count = ARRAY_SIZE(xfer) - xfer_start_idx; int ret; - ret = i2c_transfer(client->adapter, xfer, ARRAY_SIZE(xfer)); - if (unlikely(ret != ARRAY_SIZE(xfer))) - return ret < 0 ? ret : -EIO; + ret = i2c_transfer(client->adapter, &xfer[xfer_start_idx], xfer_count); + if (likely(ret == xfer_count)) + return 0; + + return ret < 0 ? ret : -EIO; +} - return 0; +static int raydium_i2c_send(struct i2c_client *client, + u32 addr, const void *data, size_t len) +{ + int tries = 0; + int error; + + do { + error = raydium_i2c_xfer(client, addr, (void *)data, len, + false); + if (likely(!error)) + return 0; + + msleep(RM_RETRY_DELAY_MS); + } while (++tries < RM_MAX_RETRIES); + + dev_err(&client->dev, "%s failed: %d\n", __func__, error); + return error; } -static int raydium_i2c_read_message(struct i2c_client *client, - u32 addr, void *data, size_t len) +static int raydium_i2c_read(struct i2c_client *client, + u32 addr, void *data, size_t len) { - __be32 be_addr; size_t xfer_len; int error; while (len) { xfer_len = min_t(size_t, len, RM_MAX_READ_SIZE); - - be_addr = cpu_to_be32(addr); - - error = raydium_i2c_send(client, RM_CMD_BANK_SWITCH, - &be_addr, sizeof(be_addr)); - if (!error) - error = raydium_i2c_read(client, addr & 0xff, - data, xfer_len); - if (error) + error = raydium_i2c_xfer(client, addr, data, xfer_len, true); + if (unlikely(error)) return error; len -= xfer_len; @@ -223,27 +223,13 @@ static int raydium_i2c_read_message(struct i2c_client *client, return 0; } -static int raydium_i2c_send_message(struct i2c_client *client, - u32 addr, const void *data, size_t len) -{ - __be32 be_addr = cpu_to_be32(addr); - int error; - - error = raydium_i2c_send(client, RM_CMD_BANK_SWITCH, - &be_addr, sizeof(be_addr)); - if (!error) - error = raydium_i2c_send(client, addr & 0xff, data, len); - - return error; -} - static int raydium_i2c_sw_reset(struct i2c_client *client) { const u8 soft_rst_cmd = 0x01; int error; - error = raydium_i2c_send_message(client, RM_RESET_MSG_ADDR, - &soft_rst_cmd, sizeof(soft_rst_cmd)); + error = raydium_i2c_send(client, RM_RESET_MSG_ADDR, &soft_rst_cmd, + sizeof(soft_rst_cmd)); if (error) { dev_err(&client->dev, "software reset failed: %d\n", error); return error; @@ -295,9 +281,8 @@ static int raydium_i2c_query_ts_info(struct raydium_data *ts) if (error) continue; - error = raydium_i2c_read_message(client, - le32_to_cpu(query_bank_addr), - &ts->info, sizeof(ts->info)); + error = raydium_i2c_read(client, le32_to_cpu(query_bank_addr), + &ts->info, sizeof(ts->info)); if (error) continue; @@ -834,8 +819,8 @@ static irqreturn_t raydium_i2c_irq(int irq, void *_dev) if (ts->boot_mode != RAYDIUM_TS_MAIN) goto out; - error = raydium_i2c_read_message(ts->client, ts->data_bank_addr, - ts->report_data, ts->pkg_size); + error = raydium_i2c_read(ts->client, ts->data_bank_addr, + ts->report_data, ts->pkg_size); if (error) goto out; diff --git a/drivers/input/touchscreen/s3c2410_ts.c b/drivers/input/touchscreen/s3c2410_ts.c index 82920ff46f72..2e70c0b79444 100644 --- a/drivers/input/touchscreen/s3c2410_ts.c +++ b/drivers/input/touchscreen/s3c2410_ts.c @@ -20,10 +20,43 @@ #include <linux/clk.h> #include <linux/io.h> -#include <plat/adc.h> -#include <plat/regs-adc.h> +#include <linux/soc/samsung/s3c-adc.h> #include <linux/platform_data/touchscreen-s3c2410.h> +#define S3C2410_ADCCON (0x00) +#define S3C2410_ADCTSC (0x04) +#define S3C2410_ADCDLY (0x08) +#define S3C2410_ADCDAT0 (0x0C) +#define S3C2410_ADCDAT1 (0x10) +#define S3C64XX_ADCUPDN (0x14) +#define S3C2443_ADCMUX (0x18) +#define S3C64XX_ADCCLRINT (0x18) +#define S5P_ADCMUX (0x1C) +#define S3C64XX_ADCCLRINTPNDNUP (0x20) + +/* ADCTSC Register Bits */ +#define S3C2443_ADCTSC_UD_SEN (1 << 8) +#define S3C2410_ADCTSC_YM_SEN (1<<7) +#define S3C2410_ADCTSC_YP_SEN (1<<6) +#define S3C2410_ADCTSC_XM_SEN (1<<5) +#define S3C2410_ADCTSC_XP_SEN (1<<4) +#define S3C2410_ADCTSC_PULL_UP_DISABLE (1<<3) +#define S3C2410_ADCTSC_AUTO_PST (1<<2) +#define S3C2410_ADCTSC_XY_PST(x) (((x)&0x3)<<0) + +/* ADCDAT0 Bits */ +#define S3C2410_ADCDAT0_UPDOWN (1<<15) +#define S3C2410_ADCDAT0_AUTO_PST (1<<14) +#define S3C2410_ADCDAT0_XY_PST (0x3<<12) +#define S3C2410_ADCDAT0_XPDATA_MASK (0x03FF) + +/* ADCDAT1 Bits */ +#define S3C2410_ADCDAT1_UPDOWN (1<<15) +#define S3C2410_ADCDAT1_AUTO_PST (1<<14) +#define S3C2410_ADCDAT1_XY_PST (0x3<<12) +#define S3C2410_ADCDAT1_YPDATA_MASK (0x03FF) + + #define TSC_SLEEP (S3C2410_ADCTSC_PULL_UP_DISABLE | S3C2410_ADCTSC_XY_PST(0)) #define INT_DOWN (0) diff --git a/drivers/input/touchscreen/stmfts.c b/drivers/input/touchscreen/stmfts.c index df946869d4cd..9a64e1dbc04a 100644 --- a/drivers/input/touchscreen/stmfts.c +++ b/drivers/input/touchscreen/stmfts.c @@ -479,7 +479,7 @@ static ssize_t stmfts_sysfs_hover_enable_write(struct device *dev, mutex_lock(&sdata->mutex); - if (value & sdata->hover_enabled) + if (value && sdata->hover_enabled) goto out; if (sdata->running) diff --git a/drivers/input/touchscreen/zinitix.c b/drivers/input/touchscreen/zinitix.c new file mode 100644 index 000000000000..1acc2eb2bcb3 --- /dev/null +++ b/drivers/input/touchscreen/zinitix.c @@ -0,0 +1,581 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/input.h> +#include <linux/input/mt.h> +#include <linux/input/touchscreen.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> + +/* Register Map */ + +#define BT541_SWRESET_CMD 0x0000 +#define BT541_WAKEUP_CMD 0x0001 + +#define BT541_IDLE_CMD 0x0004 +#define BT541_SLEEP_CMD 0x0005 + +#define BT541_CLEAR_INT_STATUS_CMD 0x0003 +#define BT541_CALIBRATE_CMD 0x0006 +#define BT541_SAVE_STATUS_CMD 0x0007 +#define BT541_SAVE_CALIBRATION_CMD 0x0008 +#define BT541_RECALL_FACTORY_CMD 0x000f + +#define BT541_THRESHOLD 0x0020 + +#define BT541_LARGE_PALM_REJECT_AREA_TH 0x003F + +#define BT541_DEBUG_REG 0x0115 /* 0~7 */ + +#define BT541_TOUCH_MODE 0x0010 +#define BT541_CHIP_REVISION 0x0011 +#define BT541_FIRMWARE_VERSION 0x0012 + +#define ZINITIX_USB_DETECT 0x116 + +#define BT541_MINOR_FW_VERSION 0x0121 + +#define BT541_VENDOR_ID 0x001C +#define BT541_HW_ID 0x0014 + +#define BT541_DATA_VERSION_REG 0x0013 +#define BT541_SUPPORTED_FINGER_NUM 0x0015 +#define BT541_EEPROM_INFO 0x0018 +#define BT541_INITIAL_TOUCH_MODE 0x0019 + +#define BT541_TOTAL_NUMBER_OF_X 0x0060 +#define BT541_TOTAL_NUMBER_OF_Y 0x0061 + +#define BT541_DELAY_RAW_FOR_HOST 0x007f + +#define BT541_BUTTON_SUPPORTED_NUM 0x00B0 +#define BT541_BUTTON_SENSITIVITY 0x00B2 +#define BT541_DUMMY_BUTTON_SENSITIVITY 0X00C8 + +#define BT541_X_RESOLUTION 0x00C0 +#define BT541_Y_RESOLUTION 0x00C1 + +#define BT541_POINT_STATUS_REG 0x0080 +#define BT541_ICON_STATUS_REG 0x00AA + +#define BT541_POINT_COORD_REG (BT541_POINT_STATUS_REG + 2) + +#define BT541_AFE_FREQUENCY 0x0100 +#define BT541_DND_N_COUNT 0x0122 +#define BT541_DND_U_COUNT 0x0135 + +#define BT541_RAWDATA_REG 0x0200 + +#define BT541_EEPROM_INFO_REG 0x0018 + +#define BT541_INT_ENABLE_FLAG 0x00f0 +#define BT541_PERIODICAL_INTERRUPT_INTERVAL 0x00f1 + +#define BT541_BTN_WIDTH 0x016d + +#define BT541_CHECKSUM_RESULT 0x012c + +#define BT541_INIT_FLASH 0x01d0 +#define BT541_WRITE_FLASH 0x01d1 +#define BT541_READ_FLASH 0x01d2 + +#define ZINITIX_INTERNAL_FLAG_02 0x011e +#define ZINITIX_INTERNAL_FLAG_03 0x011f + +#define ZINITIX_I2C_CHECKSUM_WCNT 0x016a +#define ZINITIX_I2C_CHECKSUM_RESULT 0x016c + +/* Interrupt & status register flags */ + +#define BIT_PT_CNT_CHANGE BIT(0) +#define BIT_DOWN BIT(1) +#define BIT_MOVE BIT(2) +#define BIT_UP BIT(3) +#define BIT_PALM BIT(4) +#define BIT_PALM_REJECT BIT(5) +#define BIT_RESERVED_0 BIT(6) +#define BIT_RESERVED_1 BIT(7) +#define BIT_WEIGHT_CHANGE BIT(8) +#define BIT_PT_NO_CHANGE BIT(9) +#define BIT_REJECT BIT(10) +#define BIT_PT_EXIST BIT(11) +#define BIT_RESERVED_2 BIT(12) +#define BIT_ERROR BIT(13) +#define BIT_DEBUG BIT(14) +#define BIT_ICON_EVENT BIT(15) + +#define SUB_BIT_EXIST BIT(0) +#define SUB_BIT_DOWN BIT(1) +#define SUB_BIT_MOVE BIT(2) +#define SUB_BIT_UP BIT(3) +#define SUB_BIT_UPDATE BIT(4) +#define SUB_BIT_WAIT BIT(5) + +#define DEFAULT_TOUCH_POINT_MODE 2 +#define MAX_SUPPORTED_FINGER_NUM 5 + +#define CHIP_ON_DELAY 15 // ms +#define FIRMWARE_ON_DELAY 40 // ms + +struct point_coord { + __le16 x; + __le16 y; + u8 width; + u8 sub_status; + // currently unused, but needed as padding: + u8 minor_width; + u8 angle; +}; + +struct touch_event { + __le16 status; + u8 finger_cnt; + u8 time_stamp; + struct point_coord point_coord[MAX_SUPPORTED_FINGER_NUM]; +}; + +struct bt541_ts_data { + struct i2c_client *client; + struct input_dev *input_dev; + struct touchscreen_properties prop; + struct regulator_bulk_data supplies[2]; + u32 zinitix_mode; +}; + +static int zinitix_read_data(struct i2c_client *client, + u16 reg, void *values, size_t length) +{ + __le16 reg_le = cpu_to_le16(reg); + int ret; + + /* A single i2c_transfer() transaction does not work here. */ + ret = i2c_master_send(client, (u8 *)®_le, sizeof(reg_le)); + if (ret != sizeof(reg_le)) + return ret < 0 ? ret : -EIO; + + ret = i2c_master_recv(client, (u8 *)values, length); + if (ret != length) + return ret < 0 ? ret : -EIO; ; + + return 0; +} + +static int zinitix_write_u16(struct i2c_client *client, u16 reg, u16 value) +{ + __le16 packet[2] = {cpu_to_le16(reg), cpu_to_le16(value)}; + int ret; + + ret = i2c_master_send(client, (u8 *)packet, sizeof(packet)); + if (ret != sizeof(packet)) + return ret < 0 ? ret : -EIO; + + return 0; +} + +static int zinitix_write_cmd(struct i2c_client *client, u16 reg) +{ + __le16 reg_le = cpu_to_le16(reg); + int ret; + + ret = i2c_master_send(client, (u8 *)®_le, sizeof(reg_le)); + if (ret != sizeof(reg_le)) + return ret < 0 ? ret : -EIO; + + return 0; +} + +static bool zinitix_init_touch(struct bt541_ts_data *bt541) +{ + struct i2c_client *client = bt541->client; + int i; + int error; + + error = zinitix_write_cmd(client, BT541_SWRESET_CMD); + if (error) { + dev_err(&client->dev, "Failed to write reset command\n"); + return error; + } + + error = zinitix_write_u16(client, BT541_INT_ENABLE_FLAG, 0x0); + if (error) { + dev_err(&client->dev, + "Failed to reset interrupt enable flag\n"); + return error; + } + + /* initialize */ + error = zinitix_write_u16(client, BT541_X_RESOLUTION, + bt541->prop.max_x); + if (error) + return error; + + error = zinitix_write_u16(client, BT541_Y_RESOLUTION, + bt541->prop.max_y); + if (error) + return error; + + error = zinitix_write_u16(client, BT541_SUPPORTED_FINGER_NUM, + MAX_SUPPORTED_FINGER_NUM); + if (error) + return error; + + error = zinitix_write_u16(client, BT541_INITIAL_TOUCH_MODE, + bt541->zinitix_mode); + if (error) + return error; + + error = zinitix_write_u16(client, BT541_TOUCH_MODE, + bt541->zinitix_mode); + if (error) + return error; + + error = zinitix_write_u16(client, BT541_INT_ENABLE_FLAG, + BIT_PT_CNT_CHANGE | BIT_DOWN | BIT_MOVE | + BIT_UP); + if (error) + return error; + + /* clear queue */ + for (i = 0; i < 10; i++) { + zinitix_write_cmd(client, BT541_CLEAR_INT_STATUS_CMD); + udelay(10); + } + + return 0; +} + +static int zinitix_init_regulators(struct bt541_ts_data *bt541) +{ + struct i2c_client *client = bt541->client; + int error; + + bt541->supplies[0].supply = "vdd"; + bt541->supplies[1].supply = "vddo"; + error = devm_regulator_bulk_get(&client->dev, + ARRAY_SIZE(bt541->supplies), + bt541->supplies); + if (error < 0) { + dev_err(&client->dev, "Failed to get regulators: %d\n", error); + return error; + } + + return 0; +} + +static int zinitix_send_power_on_sequence(struct bt541_ts_data *bt541) +{ + int error; + struct i2c_client *client = bt541->client; + + error = zinitix_write_u16(client, 0xc000, 0x0001); + if (error) { + dev_err(&client->dev, + "Failed to send power sequence(vendor cmd enable)\n"); + return error; + } + udelay(10); + + error = zinitix_write_cmd(client, 0xc004); + if (error) { + dev_err(&client->dev, + "Failed to send power sequence (intn clear)\n"); + return error; + } + udelay(10); + + error = zinitix_write_u16(client, 0xc002, 0x0001); + if (error) { + dev_err(&client->dev, + "Failed to send power sequence (nvm init)\n"); + return error; + } + mdelay(2); + + error = zinitix_write_u16(client, 0xc001, 0x0001); + if (error) { + dev_err(&client->dev, + "Failed to send power sequence (program start)\n"); + return error; + } + msleep(FIRMWARE_ON_DELAY); + + return 0; +} + +static void zinitix_report_finger(struct bt541_ts_data *bt541, int slot, + const struct point_coord *p) +{ + input_mt_slot(bt541->input_dev, slot); + input_mt_report_slot_state(bt541->input_dev, MT_TOOL_FINGER, true); + touchscreen_report_pos(bt541->input_dev, &bt541->prop, + le16_to_cpu(p->x), le16_to_cpu(p->y), true); + input_report_abs(bt541->input_dev, ABS_MT_TOUCH_MAJOR, p->width); +} + +static irqreturn_t zinitix_ts_irq_handler(int irq, void *bt541_handler) +{ + struct bt541_ts_data *bt541 = bt541_handler; + struct i2c_client *client = bt541->client; + struct touch_event touch_event; + int error; + int i; + + memset(&touch_event, 0, sizeof(struct touch_event)); + + error = zinitix_read_data(bt541->client, BT541_POINT_STATUS_REG, + &touch_event, sizeof(struct touch_event)); + if (error) { + dev_err(&client->dev, "Failed to read in touchpoint struct\n"); + goto out; + } + + for (i = 0; i < MAX_SUPPORTED_FINGER_NUM; i++) + if (touch_event.point_coord[i].sub_status & SUB_BIT_EXIST) + zinitix_report_finger(bt541, i, + &touch_event.point_coord[i]); + + input_mt_sync_frame(bt541->input_dev); + input_sync(bt541->input_dev); + +out: + zinitix_write_cmd(bt541->client, BT541_CLEAR_INT_STATUS_CMD); + return IRQ_HANDLED; +} + +static int zinitix_start(struct bt541_ts_data *bt541) +{ + int error; + + error = regulator_bulk_enable(ARRAY_SIZE(bt541->supplies), + bt541->supplies); + if (error) { + dev_err(&bt541->client->dev, + "Failed to enable regulators: %d\n", error); + return error; + } + + msleep(CHIP_ON_DELAY); + + error = zinitix_send_power_on_sequence(bt541); + if (error) { + dev_err(&bt541->client->dev, + "Error while sending power-on sequence: %d\n", error); + return error; + } + + error = zinitix_init_touch(bt541); + if (error) { + dev_err(&bt541->client->dev, + "Error while configuring touch IC\n"); + return error; + } + + enable_irq(bt541->client->irq); + + return 0; +} + +static int zinitix_stop(struct bt541_ts_data *bt541) +{ + int error; + + disable_irq(bt541->client->irq); + + error = regulator_bulk_disable(ARRAY_SIZE(bt541->supplies), + bt541->supplies); + if (error) { + dev_err(&bt541->client->dev, + "Failed to disable regulators: %d\n", error); + return error; + } + + return 0; +} + +static int zinitix_input_open(struct input_dev *dev) +{ + struct bt541_ts_data *bt541 = input_get_drvdata(dev); + + return zinitix_start(bt541); +} + +static void zinitix_input_close(struct input_dev *dev) +{ + struct bt541_ts_data *bt541 = input_get_drvdata(dev); + + zinitix_stop(bt541); +} + +static int zinitix_init_input_dev(struct bt541_ts_data *bt541) +{ + struct input_dev *input_dev; + int error; + + input_dev = devm_input_allocate_device(&bt541->client->dev); + if (!input_dev) { + dev_err(&bt541->client->dev, + "Failed to allocate input device."); + return -ENOMEM; + } + + input_set_drvdata(input_dev, bt541); + bt541->input_dev = input_dev; + + input_dev->name = "Zinitix Capacitive TouchScreen"; + input_dev->phys = "input/ts"; + input_dev->id.bustype = BUS_I2C; + input_dev->open = zinitix_input_open; + input_dev->close = zinitix_input_close; + + input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X); + input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y); + input_set_abs_params(input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); + input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); + + touchscreen_parse_properties(input_dev, true, &bt541->prop); + if (!bt541->prop.max_x || !bt541->prop.max_y) { + dev_err(&bt541->client->dev, + "Touchscreen-size-x and/or touchscreen-size-y not set in dts\n"); + return -EINVAL; + } + + error = input_mt_init_slots(input_dev, MAX_SUPPORTED_FINGER_NUM, + INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); + if (error) { + dev_err(&bt541->client->dev, + "Failed to initialize MT slots: %d", error); + return error; + } + + error = input_register_device(input_dev); + if (error) { + dev_err(&bt541->client->dev, + "Failed to register input device: %d", error); + return error; + } + + return 0; +} + +static int zinitix_ts_probe(struct i2c_client *client) +{ + struct bt541_ts_data *bt541; + int error; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + dev_err(&client->dev, + "Failed to assert adapter's support for plain I2C.\n"); + return -ENXIO; + } + + bt541 = devm_kzalloc(&client->dev, sizeof(*bt541), GFP_KERNEL); + if (!bt541) + return -ENOMEM; + + bt541->client = client; + i2c_set_clientdata(client, bt541); + + error = zinitix_init_regulators(bt541); + if (error) { + dev_err(&client->dev, + "Failed to initialize regulators: %d\n", error); + return error; + } + + error = zinitix_init_input_dev(bt541); + if (error) { + dev_err(&client->dev, + "Failed to initialize input device: %d\n", error); + return error; + } + + error = device_property_read_u32(&client->dev, "zinitix,mode", + &bt541->zinitix_mode); + if (error < 0) { + /* fall back to mode 2 */ + bt541->zinitix_mode = DEFAULT_TOUCH_POINT_MODE; + } + + if (bt541->zinitix_mode != 2) { + /* + * If there are devices that don't support mode 2, support + * for other modes (0, 1) will be needed. + */ + dev_err(&client->dev, + "Malformed zinitix,mode property, must be 2 (supplied: %d)\n", + bt541->zinitix_mode); + return -EINVAL; + } + + irq_set_status_flags(client->irq, IRQ_NOAUTOEN); + error = devm_request_threaded_irq(&client->dev, client->irq, + NULL, zinitix_ts_irq_handler, + IRQF_ONESHOT, client->name, bt541); + if (error) { + dev_err(&client->dev, "Failed to request IRQ: %d\n", error); + return error; + } + + return 0; +} + +static int __maybe_unused zinitix_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct bt541_ts_data *bt541 = i2c_get_clientdata(client); + + mutex_lock(&bt541->input_dev->mutex); + + if (bt541->input_dev->users) + zinitix_stop(bt541); + + mutex_unlock(&bt541->input_dev->mutex); + + return 0; +} + +static int __maybe_unused zinitix_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct bt541_ts_data *bt541 = i2c_get_clientdata(client); + int ret = 0; + + mutex_lock(&bt541->input_dev->mutex); + + if (bt541->input_dev->users) + ret = zinitix_start(bt541); + + mutex_unlock(&bt541->input_dev->mutex); + + return ret; +} + +static SIMPLE_DEV_PM_OPS(zinitix_pm_ops, zinitix_suspend, zinitix_resume); + +#ifdef CONFIG_OF +static const struct of_device_id zinitix_of_match[] = { + { .compatible = "zinitix,bt541" }, + { } +}; +MODULE_DEVICE_TABLE(of, zinitix_of_match); +#endif + +static struct i2c_driver zinitix_ts_driver = { + .probe_new = zinitix_ts_probe, + .driver = { + .name = "Zinitix-TS", + .pm = &zinitix_pm_ops, + .of_match_table = of_match_ptr(zinitix_of_match), + }, +}; +module_i2c_driver(zinitix_ts_driver); + +MODULE_AUTHOR("Michael Srba <Michael.Srba@seznam.cz>"); +MODULE_DESCRIPTION("Zinitix touchscreen driver"); +MODULE_LICENSE("GPL v2"); |