diff options
| -rw-r--r-- | drivers/input/mouse/Makefile | 3 | ||||
| -rw-r--r-- | drivers/input/mouse/cyapa.c | 1076 | ||||
| -rw-r--r-- | drivers/input/mouse/cyapa.h | 296 | ||||
| -rw-r--r-- | drivers/input/mouse/cyapa_gen3.c | 807 |
4 files changed, 1516 insertions, 666 deletions
diff --git a/drivers/input/mouse/Makefile b/drivers/input/mouse/Makefile index 560003dcac37..8bd950d52d5c 100644 --- a/drivers/input/mouse/Makefile +++ b/drivers/input/mouse/Makefile @@ -8,7 +8,7 @@ obj-$(CONFIG_MOUSE_AMIGA) += amimouse.o obj-$(CONFIG_MOUSE_APPLETOUCH) += appletouch.o obj-$(CONFIG_MOUSE_ATARI) += atarimouse.o obj-$(CONFIG_MOUSE_BCM5974) += bcm5974.o -obj-$(CONFIG_MOUSE_CYAPA) += cyapa.o +obj-$(CONFIG_MOUSE_CYAPA) += cyapatp.o obj-$(CONFIG_MOUSE_ELAN_I2C) += elan_i2c.o obj-$(CONFIG_MOUSE_GPIO) += gpio_mouse.o obj-$(CONFIG_MOUSE_INPORT) += inport.o @@ -24,6 +24,7 @@ obj-$(CONFIG_MOUSE_SYNAPTICS_I2C) += synaptics_i2c.o obj-$(CONFIG_MOUSE_SYNAPTICS_USB) += synaptics_usb.o obj-$(CONFIG_MOUSE_VSXXXAA) += vsxxxaa.o +cyapatp-objs := cyapa.o cyapa_gen3.o psmouse-objs := psmouse-base.o synaptics.o focaltech.o psmouse-$(CONFIG_MOUSE_PS2_ALPS) += alps.o diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c index 1bece8cad46f..36c64335662c 100644 --- a/drivers/input/mouse/cyapa.c +++ b/drivers/input/mouse/cyapa.c @@ -20,408 +20,127 @@ #include <linux/input/mt.h> #include <linux/interrupt.h> #include <linux/module.h> +#include <linux/mutex.h> #include <linux/slab.h> +#include <linux/uaccess.h> +#include "cyapa.h" -/* APA trackpad firmware generation */ -#define CYAPA_GEN3 0x03 /* support MT-protocol B with tracking ID. */ - -#define CYAPA_NAME "Cypress APA Trackpad (cyapa)" - -/* commands for read/write registers of Cypress trackpad */ -#define CYAPA_CMD_SOFT_RESET 0x00 -#define CYAPA_CMD_POWER_MODE 0x01 -#define CYAPA_CMD_DEV_STATUS 0x02 -#define CYAPA_CMD_GROUP_DATA 0x03 -#define CYAPA_CMD_GROUP_CMD 0x04 -#define CYAPA_CMD_GROUP_QUERY 0x05 -#define CYAPA_CMD_BL_STATUS 0x06 -#define CYAPA_CMD_BL_HEAD 0x07 -#define CYAPA_CMD_BL_CMD 0x08 -#define CYAPA_CMD_BL_DATA 0x09 -#define CYAPA_CMD_BL_ALL 0x0a -#define CYAPA_CMD_BLK_PRODUCT_ID 0x0b -#define CYAPA_CMD_BLK_HEAD 0x0c - -/* report data start reg offset address. */ -#define DATA_REG_START_OFFSET 0x0000 - -#define BL_HEAD_OFFSET 0x00 -#define BL_DATA_OFFSET 0x10 - -/* - * Operational Device Status Register - * - * bit 7: Valid interrupt source - * bit 6 - 4: Reserved - * bit 3 - 2: Power status - * bit 1 - 0: Device status - */ -#define REG_OP_STATUS 0x00 -#define OP_STATUS_SRC 0x80 -#define OP_STATUS_POWER 0x0c -#define OP_STATUS_DEV 0x03 -#define OP_STATUS_MASK (OP_STATUS_SRC | OP_STATUS_POWER | OP_STATUS_DEV) - -/* - * Operational Finger Count/Button Flags Register - * - * bit 7 - 4: Number of touched finger - * bit 3: Valid data - * bit 2: Middle Physical Button - * bit 1: Right Physical Button - * bit 0: Left physical Button - */ -#define REG_OP_DATA1 0x01 -#define OP_DATA_VALID 0x08 -#define OP_DATA_MIDDLE_BTN 0x04 -#define OP_DATA_RIGHT_BTN 0x02 -#define OP_DATA_LEFT_BTN 0x01 -#define OP_DATA_BTN_MASK (OP_DATA_MIDDLE_BTN | OP_DATA_RIGHT_BTN | \ - OP_DATA_LEFT_BTN) - -/* - * Bootloader Status Register - * - * bit 7: Busy - * bit 6 - 5: Reserved - * bit 4: Bootloader running - * bit 3 - 1: Reserved - * bit 0: Checksum valid - */ -#define REG_BL_STATUS 0x01 -#define BL_STATUS_BUSY 0x80 -#define BL_STATUS_RUNNING 0x10 -#define BL_STATUS_DATA_VALID 0x08 -#define BL_STATUS_CSUM_VALID 0x01 - -/* - * Bootloader Error Register - * - * bit 7: Invalid - * bit 6: Invalid security key - * bit 5: Bootloading - * bit 4: Command checksum - * bit 3: Flash protection error - * bit 2: Flash checksum error - * bit 1 - 0: Reserved - */ -#define REG_BL_ERROR 0x02 -#define BL_ERROR_INVALID 0x80 -#define BL_ERROR_INVALID_KEY 0x40 -#define BL_ERROR_BOOTLOADING 0x20 -#define BL_ERROR_CMD_CSUM 0x10 -#define BL_ERROR_FLASH_PROT 0x08 -#define BL_ERROR_FLASH_CSUM 0x04 - -#define BL_STATUS_SIZE 3 /* length of bootloader status registers */ -#define BLK_HEAD_BYTES 32 - -#define PRODUCT_ID_SIZE 16 -#define QUERY_DATA_SIZE 27 -#define REG_PROTOCOL_GEN_QUERY_OFFSET 20 - -#define REG_OFFSET_DATA_BASE 0x0000 -#define REG_OFFSET_COMMAND_BASE 0x0028 -#define REG_OFFSET_QUERY_BASE 0x002a - -#define CAPABILITY_LEFT_BTN_MASK (0x01 << 3) -#define CAPABILITY_RIGHT_BTN_MASK (0x01 << 4) -#define CAPABILITY_MIDDLE_BTN_MASK (0x01 << 5) -#define CAPABILITY_BTN_MASK (CAPABILITY_LEFT_BTN_MASK | \ - CAPABILITY_RIGHT_BTN_MASK | \ - CAPABILITY_MIDDLE_BTN_MASK) - -#define CYAPA_OFFSET_SOFT_RESET REG_OFFSET_COMMAND_BASE - -#define REG_OFFSET_POWER_MODE (REG_OFFSET_COMMAND_BASE + 1) - -#define PWR_MODE_MASK 0xfc -#define PWR_MODE_FULL_ACTIVE (0x3f << 2) -#define PWR_MODE_IDLE (0x05 << 2) /* default sleep time is 50 ms. */ -#define PWR_MODE_OFF (0x00 << 2) - -#define PWR_STATUS_MASK 0x0c -#define PWR_STATUS_ACTIVE (0x03 << 2) -#define PWR_STATUS_IDLE (0x02 << 2) -#define PWR_STATUS_OFF (0x00 << 2) - -/* - * CYAPA trackpad device states. - * Used in register 0x00, bit1-0, DeviceStatus field. - * Other values indicate device is in an abnormal state and must be reset. - */ -#define CYAPA_DEV_NORMAL 0x03 -#define CYAPA_DEV_BUSY 0x01 - -enum cyapa_state { - CYAPA_STATE_OP, - CYAPA_STATE_BL_IDLE, - CYAPA_STATE_BL_ACTIVE, - CYAPA_STATE_BL_BUSY, - CYAPA_STATE_NO_DEVICE, -}; - - -struct cyapa_touch { - /* - * high bits or x/y position value - * bit 7 - 4: high 4 bits of x position value - * bit 3 - 0: high 4 bits of y position value - */ - u8 xy_hi; - u8 x_lo; /* low 8 bits of x position value. */ - u8 y_lo; /* low 8 bits of y position value. */ - u8 pressure; - /* id range is 1 - 15. It is incremented with every new touch. */ - u8 id; -} __packed; - -/* The touch.id is used as the MT slot id, thus max MT slot is 15 */ -#define CYAPA_MAX_MT_SLOTS 15 - -struct cyapa_reg_data { - /* - * bit 0 - 1: device status - * bit 3 - 2: power mode - * bit 6 - 4: reserved - * bit 7: interrupt valid bit - */ - u8 device_status; - /* - * bit 7 - 4: number of fingers currently touching pad - * bit 3: valid data check bit - * bit 2: middle mechanism button state if exists - * bit 1: right mechanism button state if exists - * bit 0: left mechanism button state if exists - */ - u8 finger_btn; - /* CYAPA reports up to 5 touches per packet. */ - struct cyapa_touch touches[5]; -} __packed; - -/* The main device structure */ -struct cyapa { - enum cyapa_state state; - - struct i2c_client *client; - struct input_dev *input; - char phys[32]; /* device physical location */ - bool irq_wake; /* irq wake is enabled */ - bool smbus; - - /* read from query data region. */ - char product_id[16]; - u8 btn_capability; - u8 gen; - int max_abs_x; - int max_abs_y; - int physical_size_x; - int physical_size_y; -}; - -static const u8 bl_deactivate[] = { 0x00, 0xff, 0x3b, 0x00, 0x01, 0x02, 0x03, - 0x04, 0x05, 0x06, 0x07 }; -static const u8 bl_exit[] = { 0x00, 0xff, 0xa5, 0x00, 0x01, 0x02, 0x03, 0x04, - 0x05, 0x06, 0x07 }; - -struct cyapa_cmd_len { - u8 cmd; - u8 len; -}; #define CYAPA_ADAPTER_FUNC_NONE 0 #define CYAPA_ADAPTER_FUNC_I2C 1 #define CYAPA_ADAPTER_FUNC_SMBUS 2 #define CYAPA_ADAPTER_FUNC_BOTH 3 -/* - * macros for SMBus communication - */ -#define SMBUS_READ 0x01 -#define SMBUS_WRITE 0x00 -#define SMBUS_ENCODE_IDX(cmd, idx) ((cmd) | (((idx) & 0x03) << 1)) -#define SMBUS_ENCODE_RW(cmd, rw) ((cmd) | ((rw) & 0x01)) -#define SMBUS_BYTE_BLOCK_CMD_MASK 0x80 -#define SMBUS_GROUP_BLOCK_CMD_MASK 0x40 - - /* for byte read/write command */ -#define CMD_RESET 0 -#define CMD_POWER_MODE 1 -#define CMD_DEV_STATUS 2 -#define SMBUS_BYTE_CMD(cmd) (((cmd) & 0x3f) << 1) -#define CYAPA_SMBUS_RESET SMBUS_BYTE_CMD(CMD_RESET) -#define CYAPA_SMBUS_POWER_MODE SMBUS_BYTE_CMD(CMD_POWER_MODE) -#define CYAPA_SMBUS_DEV_STATUS SMBUS_BYTE_CMD(CMD_DEV_STATUS) - - /* for group registers read/write command */ -#define REG_GROUP_DATA 0 -#define REG_GROUP_CMD 2 -#define REG_GROUP_QUERY 3 -#define SMBUS_GROUP_CMD(grp) (0x80 | (((grp) & 0x07) << 3)) -#define CYAPA_SMBUS_GROUP_DATA SMBUS_GROUP_CMD(REG_GROUP_DATA) -#define CYAPA_SMBUS_GROUP_CMD SMBUS_GROUP_CMD(REG_GROUP_CMD) -#define CYAPA_SMBUS_GROUP_QUERY SMBUS_GROUP_CMD(REG_GROUP_QUERY) - - /* for register block read/write command */ -#define CMD_BL_STATUS 0 -#define CMD_BL_HEAD 1 -#define CMD_BL_CMD 2 -#define CMD_BL_DATA 3 -#define CMD_BL_ALL 4 -#define CMD_BLK_PRODUCT_ID 5 -#define CMD_BLK_HEAD 6 -#define SMBUS_BLOCK_CMD(cmd) (0xc0 | (((cmd) & 0x1f) << 1)) - -/* register block read/write command in bootloader mode */ -#define CYAPA_SMBUS_BL_STATUS SMBUS_BLOCK_CMD(CMD_BL_STATUS) -#define CYAPA_SMBUS_BL_HEAD SMBUS_BLOCK_CMD(CMD_BL_HEAD) -#define CYAPA_SMBUS_BL_CMD SMBUS_BLOCK_CMD(CMD_BL_CMD) -#define CYAPA_SMBUS_BL_DATA SMBUS_BLOCK_CMD(CMD_BL_DATA) -#define CYAPA_SMBUS_BL_ALL SMBUS_BLOCK_CMD(CMD_BL_ALL) - -/* register block read/write command in operational mode */ -#define CYAPA_SMBUS_BLK_PRODUCT_ID SMBUS_BLOCK_CMD(CMD_BLK_PRODUCT_ID) -#define CYAPA_SMBUS_BLK_HEAD SMBUS_BLOCK_CMD(CMD_BLK_HEAD) - -static const struct cyapa_cmd_len cyapa_i2c_cmds[] = { - { CYAPA_OFFSET_SOFT_RESET, 1 }, - { REG_OFFSET_COMMAND_BASE + 1, 1 }, - { REG_OFFSET_DATA_BASE, 1 }, - { REG_OFFSET_DATA_BASE, sizeof(struct cyapa_reg_data) }, - { REG_OFFSET_COMMAND_BASE, 0 }, - { REG_OFFSET_QUERY_BASE, QUERY_DATA_SIZE }, - { BL_HEAD_OFFSET, 3 }, - { BL_HEAD_OFFSET, 16 }, - { BL_HEAD_OFFSET, 16 }, - { BL_DATA_OFFSET, 16 }, - { BL_HEAD_OFFSET, 32 }, - { REG_OFFSET_QUERY_BASE, PRODUCT_ID_SIZE }, - { REG_OFFSET_DATA_BASE, 32 } -}; +const char product_id[] = "CYTRA"; -static const struct cyapa_cmd_len cyapa_smbus_cmds[] = { - { CYAPA_SMBUS_RESET, 1 }, - { CYAPA_SMBUS_POWER_MODE, 1 }, - { CYAPA_SMBUS_DEV_STATUS, 1 }, - { CYAPA_SMBUS_GROUP_DATA, sizeof(struct cyapa_reg_data) }, - { CYAPA_SMBUS_GROUP_CMD, 2 }, - { CYAPA_SMBUS_GROUP_QUERY, QUERY_DATA_SIZE }, - { CYAPA_SMBUS_BL_STATUS, 3 }, - { CYAPA_SMBUS_BL_HEAD, 16 }, - { CYAPA_SMBUS_BL_CMD, 16 }, - { CYAPA_SMBUS_BL_DATA, 16 }, - { CYAPA_SMBUS_BL_ALL, 32 }, - { CYAPA_SMBUS_BLK_PRODUCT_ID, PRODUCT_ID_SIZE }, - { CYAPA_SMBUS_BLK_HEAD, 16 }, -}; +static int cyapa_reinitialize(struct cyapa *cyapa); -static ssize_t cyapa_i2c_reg_read_block(struct cyapa *cyapa, u8 reg, size_t len, - u8 *values) +static inline bool cyapa_is_bootloader_mode(struct cyapa *cyapa) { - return i2c_smbus_read_i2c_block_data(cyapa->client, reg, len, values); + if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_BL) + return true; + + if (cyapa->gen == CYAPA_GEN3 && + cyapa->state >= CYAPA_STATE_BL_BUSY && + cyapa->state <= CYAPA_STATE_BL_ACTIVE) + return true; + + return false; } -static ssize_t cyapa_i2c_reg_write_block(struct cyapa *cyapa, u8 reg, - size_t len, const u8 *values) +static inline bool cyapa_is_operational_mode(struct cyapa *cyapa) { - return i2c_smbus_write_i2c_block_data(cyapa->client, reg, len, values); + if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_APP) + return true; + + if (cyapa->gen == CYAPA_GEN3 && cyapa->state == CYAPA_STATE_OP) + return true; + + return false; } -/* - * cyapa_smbus_read_block - perform smbus block read command - * @cyapa - private data structure of the driver - * @cmd - the properly encoded smbus command - * @len - expected length of smbus command result - * @values - buffer to store smbus command result - * - * Returns negative errno, else the number of bytes written. - * - * Note: - * In trackpad device, the memory block allocated for I2C register map - * is 256 bytes, so the max read block for I2C bus is 256 bytes. - */ -static ssize_t cyapa_smbus_read_block(struct cyapa *cyapa, u8 cmd, size_t len, - u8 *values) +/* Returns 0 on success, else negative errno on failure. */ +static ssize_t cyapa_i2c_read(struct cyapa *cyapa, u8 reg, size_t len, + u8 *values) { - ssize_t ret; - u8 index; - u8 smbus_cmd; - u8 *buf; struct i2c_client *client = cyapa->client; + struct i2c_msg msgs[] = { + { + .addr = client->addr, + .flags = 0, + .len = 1, + .buf = ®, + }, + { + .addr = client->addr, + .flags = I2C_M_RD, + .len = len, + .buf = values, + }, + }; + int ret; - if (!(SMBUS_BYTE_BLOCK_CMD_MASK & cmd)) - return -EINVAL; - - if (SMBUS_GROUP_BLOCK_CMD_MASK & cmd) { - /* read specific block registers command. */ - smbus_cmd = SMBUS_ENCODE_RW(cmd, SMBUS_READ); - ret = i2c_smbus_read_block_data(client, smbus_cmd, values); - goto out; - } + ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); - ret = 0; - for (index = 0; index * I2C_SMBUS_BLOCK_MAX < len; index++) { - smbus_cmd = SMBUS_ENCODE_IDX(cmd, index); - smbus_cmd = SMBUS_ENCODE_RW(smbus_cmd, SMBUS_READ); - buf = values + I2C_SMBUS_BLOCK_MAX * index; - ret = i2c_smbus_read_block_data(client, smbus_cmd, buf); - if (ret < 0) - goto out; - } + if (ret != ARRAY_SIZE(msgs)) + return ret < 0 ? ret : -EIO; -out: - return ret > 0 ? len : ret; + return 0; } -static s32 cyapa_read_byte(struct cyapa *cyapa, u8 cmd_idx) +/** + * cyapa_i2c_write - Execute i2c block data write operation + * @cyapa: Handle to this driver + * @ret: Offset of the data to written in the register map + * @len: number of bytes to write + * @values: Data to be written + * + * Return negative errno code on error; return zero when success. + */ +static int cyapa_i2c_write(struct cyapa *cyapa, u8 reg, + size_t len, const void *values) { - u8 cmd; + struct i2c_client *client = cyapa->client; + char buf[32]; + int ret; - if (cyapa->smbus) { - cmd = cyapa_smbus_cmds[cmd_idx].cmd; - cmd = SMBUS_ENCODE_RW(cmd, SMBUS_READ); - } else { - cmd = cyapa_i2c_cmds[cmd_idx].cmd; - } - return i2c_smbus_read_byte_data(cyapa->client, cmd); -} + if (len > sizeof(buf) - 1) + return -ENOMEM; -static s32 cyapa_write_byte(struct cyapa *cyapa, u8 cmd_idx, u8 value) -{ - u8 cmd; + buf[0] = reg; + memcpy(&buf[1], values, len); - if (cyapa->smbus) { - cmd = cyapa_smbus_cmds[cmd_idx].cmd; - cmd = SMBUS_ENCODE_RW(cmd, SMBUS_WRITE); - } else { - cmd = cyapa_i2c_cmds[cmd_idx].cmd; - } - return i2c_smbus_write_byte_data(cyapa->client, cmd, value); + ret = i2c_master_send(client, buf, len + 1); + if (ret != len + 1) + return ret < 0 ? ret : -EIO; + + return 0; } -static ssize_t cyapa_read_block(struct cyapa *cyapa, u8 cmd_idx, u8 *values) +static u8 cyapa_check_adapter_functionality(struct i2c_client *client) { - u8 cmd; - size_t len; + u8 ret = CYAPA_ADAPTER_FUNC_NONE; - if (cyapa->smbus) { - cmd = cyapa_smbus_cmds[cmd_idx].cmd; - len = cyapa_smbus_cmds[cmd_idx].len; - return cyapa_smbus_read_block(cyapa, cmd, len, values); - } else { - cmd = cyapa_i2c_cmds[cmd_idx].cmd; - len = cyapa_i2c_cmds[cmd_idx].len; - return cyapa_i2c_reg_read_block(cyapa, cmd, len, values); - } + if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) + ret |= CYAPA_ADAPTER_FUNC_I2C; + if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA | + I2C_FUNC_SMBUS_BLOCK_DATA | + I2C_FUNC_SMBUS_I2C_BLOCK)) + ret |= CYAPA_ADAPTER_FUNC_SMBUS; + return ret; } /* * Query device for its current operating state. - * */ static int cyapa_get_state(struct cyapa *cyapa) { u8 status[BL_STATUS_SIZE]; + u8 cmd[32]; + /* The i2c address of gen4 and gen5 trackpad device must be even. */ + bool even_addr = ((cyapa->client->addr & 0x0001) == 0); + bool smbus = false; + int retries = 2; int error; cyapa->state = CYAPA_STATE_NO_DEVICE; @@ -433,39 +152,66 @@ static int cyapa_get_state(struct cyapa *cyapa) * */ error = cyapa_i2c_reg_read_block(cyapa, BL_HEAD_OFFSET, BL_STATUS_SIZE, - status); + status); /* * On smbus systems in OP mode, the i2c_reg_read will fail with * -ETIMEDOUT. In this case, try again using the smbus equivalent * command. This should return a BL_HEAD indicating CYAPA_STATE_OP. */ - if (cyapa->smbus && (error == -ETIMEDOUT || error == -ENXIO)) - error = cyapa_read_block(cyapa, CYAPA_CMD_BL_STATUS, status); + if (cyapa->smbus && (error == -ETIMEDOUT || error == -ENXIO)) { + if (!even_addr) + error = cyapa_read_block(cyapa, + CYAPA_CMD_BL_STATUS, status); + smbus = true; + } if (error != BL_STATUS_SIZE) goto error; - if ((status[REG_OP_STATUS] & OP_STATUS_SRC) == OP_STATUS_SRC) { - switch (status[REG_OP_STATUS] & OP_STATUS_DEV) { - case CYAPA_DEV_NORMAL: - case CYAPA_DEV_BUSY: - cyapa->state = CYAPA_STATE_OP; - break; - default: - error = -EAGAIN; - goto error; + /* + * Detect trackpad protocol based on characteristic registers and bits. + */ + do { + cyapa->status[REG_OP_STATUS] = status[REG_OP_STATUS]; + cyapa->status[REG_BL_STATUS] = status[REG_BL_STATUS]; + cyapa->status[REG_BL_ERROR] = status[REG_BL_ERROR]; + + if (cyapa->gen == CYAPA_GEN_UNKNOWN || + cyapa->gen == CYAPA_GEN3) { + error = cyapa_gen3_ops.state_parse(cyapa, + status, BL_STATUS_SIZE); + if (!error) + goto out_detected; } - } else { - if (status[REG_BL_STATUS] & BL_STATUS_BUSY) - cyapa->state = CYAPA_STATE_BL_BUSY; - else if (status[REG_BL_ERROR] & BL_ERROR_BOOTLOADING) - cyapa->state = CYAPA_STATE_BL_ACTIVE; - else - cyapa->state = CYAPA_STATE_BL_IDLE; - } + /* + * Write 0x00 0x00 to trackpad device to force update its + * status, then redo the detection again. + */ + if (!smbus) { + cmd[0] = 0x00; + cmd[1] = 0x00; + error = cyapa_i2c_write(cyapa, 0, 2, cmd); + if (error) + goto error; + + msleep(50); + + error = cyapa_i2c_read(cyapa, BL_HEAD_OFFSET, + BL_STATUS_SIZE, status); + if (error) + goto error; + } + } while (--retries > 0 && !smbus); + + goto error; + +out_detected: + if (cyapa->state <= CYAPA_STATE_BL_BUSY) + return -EAGAIN; return 0; + error: return (error < 0) ? error : -EAGAIN; } @@ -482,143 +228,23 @@ error: * Returns: * 0 when the device eventually responds with a valid non-busy state. * -ETIMEDOUT if device never responds (too many -EAGAIN) - * < 0 other errors + * -EAGAIN if bootload is busy, or unknown state. + * < 0 other errors */ -static int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout) +int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout) { int error; int tries = timeout / 100; - error = cyapa_get_state(cyapa); - while ((error || cyapa->state >= CYAPA_STATE_BL_BUSY) && tries--) { - msleep(100); + do { error = cyapa_get_state(cyapa); - } - return (error == -EAGAIN || error == -ETIMEDOUT) ? -ETIMEDOUT : error; -} + if (!error && cyapa->state > CYAPA_STATE_BL_BUSY) + return 0; -static int cyapa_bl_deactivate(struct cyapa *cyapa) -{ - int error; - - error = cyapa_i2c_reg_write_block(cyapa, 0, sizeof(bl_deactivate), - bl_deactivate); - if (error) - return error; - - /* wait for bootloader to switch to idle state; should take < 100ms */ - msleep(100); - error = cyapa_poll_state(cyapa, 500); - if (error) - return error; - if (cyapa->state != CYAPA_STATE_BL_IDLE) - return -EAGAIN; - return 0; -} - -/* - * Exit bootloader - * - * Send bl_exit command, then wait 50 - 100 ms to let device transition to - * operational mode. If this is the first time the device's firmware is - * running, it can take up to 2 seconds to calibrate its sensors. So, poll - * the device's new state for up to 2 seconds. - * - * Returns: - * -EIO failure while reading from device - * -EAGAIN device is stuck in bootloader, b/c it has invalid firmware - * 0 device is supported and in operational mode - */ -static int cyapa_bl_exit(struct cyapa *cyapa) -{ - int error; - - error = cyapa_i2c_reg_write_block(cyapa, 0, sizeof(bl_exit), bl_exit); - if (error) - return error; - - /* - * Wait for bootloader to exit, and operation mode to start. - * Normally, this takes at least 50 ms. - */ - usleep_range(50000, 100000); - /* - * In addition, when a device boots for the first time after being - * updated to new firmware, it must first calibrate its sensors, which - * can take up to an additional 2 seconds. - */ - error = cyapa_poll_state(cyapa, 2000); - if (error < 0) - return error; - if (cyapa->state != CYAPA_STATE_OP) - return -EAGAIN; - - return 0; -} - -/* - * Set device power mode - * - */ -static int cyapa_set_power_mode(struct cyapa *cyapa, u8 power_mode) -{ - struct device *dev = &cyapa->client->dev; - int ret; - u8 power; - - if (cyapa->state != CYAPA_STATE_OP) - return 0; - - ret = cyapa_read_byte(cyapa, CYAPA_CMD_POWER_MODE); - if (ret < 0) - return ret; - - power = ret & ~PWR_MODE_MASK; - power |= power_mode & PWR_MODE_MASK; - ret = cyapa_write_byte(cyapa, CYAPA_CMD_POWER_MODE, power); - if (ret < 0) { - dev_err(dev, "failed to set power_mode 0x%02x err = %d\n", - power_mode, ret); - return ret; - } - - return 0; -} - -static int cyapa_get_query_data(struct cyapa *cyapa) -{ - u8 query_data[QUERY_DATA_SIZE]; - int ret; - - if (cyapa->state != CYAPA_STATE_OP) - return -EBUSY; - - ret = cyapa_read_block(cyapa, CYAPA_CMD_GROUP_QUERY, query_data); - if (ret < 0) - return ret; - if (ret != QUERY_DATA_SIZE) - return -EIO; - - memcpy(&cyapa->product_id[0], &query_data[0], 5); - cyapa->product_id[5] = '-'; - memcpy(&cyapa->product_id[6], &query_data[5], 6); - cyapa->product_id[12] = '-'; - memcpy(&cyapa->product_id[13], &query_data[11], 2); - cyapa->product_id[15] = '\0'; - - cyapa->btn_capability = query_data[19] & CAPABILITY_BTN_MASK; - - cyapa->gen = query_data[20] & 0x0f; - - cyapa->max_abs_x = ((query_data[21] & 0xf0) << 4) | query_data[22]; - cyapa->max_abs_y = ((query_data[21] & 0x0f) << 8) | query_data[23]; - - cyapa->physical_size_x = - ((query_data[24] & 0xf0) << 4) | query_data[25]; - cyapa->physical_size_y = - ((query_data[24] & 0x0f) << 8) | query_data[26]; + msleep(100); + } while (tries--); - return 0; + return (error == -EAGAIN || error == -ETIMEDOUT) ? -ETIMEDOUT : error; } /* @@ -628,8 +254,10 @@ static int cyapa_get_query_data(struct cyapa *cyapa) * firmware supported by this driver. * * Returns: + * -ENODEV no device * -EBUSY no device or in bootloader * -EIO failure while reading from device + * -ETIMEDOUT timeout failure for bus idle or bus no response * -EAGAIN device is still in bootloader * if ->state = CYAPA_STATE_BL_IDLE, device has invalid firmware * -EINVAL device is in operational mode, but not supported by this driver @@ -637,122 +265,53 @@ static int cyapa_get_query_data(struct cyapa *cyapa) */ static int cyapa_check_is_operational(struct cyapa *cyapa) { - struct device *dev = &cyapa->client->dev; - static const char unique_str[] = "CYTRA"; int error; - error = cyapa_poll_state(cyapa, 2000); + error = cyapa_poll_state(cyapa, 4000); if (error) return error; - switch (cyapa->state) { - case CYAPA_STATE_BL_ACTIVE: - error = cyapa_bl_deactivate(cyapa); - if (error) - return error; - - /* Fallthrough state */ - case CYAPA_STATE_BL_IDLE: - error = cyapa_bl_exit(cyapa); - if (error) - return error; - - /* Fallthrough state */ - case CYAPA_STATE_OP: - error = cyapa_get_query_data(cyapa); - if (error) - return error; - - /* only support firmware protocol gen3 */ - if (cyapa->gen != CYAPA_GEN3) { - dev_err(dev, "unsupported protocol version (%d)", - cyapa->gen); - return -EINVAL; - } - - /* only support product ID starting with CYTRA */ - if (memcmp(cyapa->product_id, unique_str, - sizeof(unique_str) - 1) != 0) { - dev_err(dev, "unsupported product ID (%s)\n", - cyapa->product_id); - return -EINVAL; - } - return 0; + switch (cyapa->gen) { + case CYAPA_GEN3: + cyapa->ops = &cyapa_gen3_ops; + break; default: - return -EIO; + return -ENODEV; } - return 0; + + error = cyapa->ops->operational_check(cyapa); + if (!error && cyapa_is_operational_mode(cyapa)) + cyapa->operational = true; + else + cyapa->operational = false; + + return error; } -static irqreturn_t cyapa_irq(int irq, void *dev_id) + +/* + * Returns 0 on device detected, negative errno on no device detected. + * And when the device is detected and opertaional, it will be reset to + * full power active mode automatically. + */ +static int cyapa_detect(struct cyapa *cyapa) { - struct cyapa *cyapa = dev_id; struct device *dev = &cyapa->client->dev; - struct input_dev *input = cyapa->input; - struct cyapa_reg_data data; - int i; - int ret; - int num_fingers; - - if (device_may_wakeup(dev)) - pm_wakeup_event(dev, 0); - - ret = cyapa_read_block(cyapa, CYAPA_CMD_GROUP_DATA, (u8 *)&data); - if (ret != sizeof(data)) - goto out; + int error; - if ((data.device_status & OP_STATUS_SRC) != OP_STATUS_SRC || - (data.device_status & OP_STATUS_DEV) != CYAPA_DEV_NORMAL || - (data.finger_btn & OP_DATA_VALID) != OP_DATA_VALID) { - goto out; - } + error = cyapa_check_is_operational(cyapa); + if (error) { + if (error != -ETIMEDOUT && error != -ENODEV && + cyapa_is_bootloader_mode(cyapa)) { + dev_warn(dev, "device detected but not operational\n"); + return 0; + } - num_fingers = (data.finger_btn >> 4) & 0x0f; - for (i = 0; i < num_fingers; i++) { - const struct cyapa_touch *touch = &data.touches[i]; - /* Note: touch->id range is 1 to 15; slots are 0 to 14. */ - int slot = touch->id - 1; - - input_mt_slot(input, slot); - input_mt_report_slot_state(input, MT_TOOL_FINGER, true); - input_report_abs(input, ABS_MT_POSITION_X, - ((touch->xy_hi & 0xf0) << 4) | touch->x_lo); - input_report_abs(input, ABS_MT_POSITION_Y, - ((touch->xy_hi & 0x0f) << 8) | touch->y_lo); - input_report_abs(input, ABS_MT_PRESSURE, touch->pressure); + dev_err(dev, "no device detected: %d\n", error); + return error; } - input_mt_sync_frame(input); - - if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK) - input_report_key(input, BTN_LEFT, - data.finger_btn & OP_DATA_LEFT_BTN); - - if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK) - input_report_key(input, BTN_MIDDLE, - data.finger_btn & OP_DATA_MIDDLE_BTN); - - if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK) - input_report_key(input, BTN_RIGHT, - data.finger_btn & OP_DATA_RIGHT_BTN); - - input_sync(input); - -out: - return IRQ_HANDLED; -} - -static u8 cyapa_check_adapter_functionality(struct i2c_client *client) -{ - u8 ret = CYAPA_ADAPTER_FUNC_NONE; - - if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) - ret |= CYAPA_ADAPTER_FUNC_I2C; - if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA | - I2C_FUNC_SMBUS_BLOCK_DATA | - I2C_FUNC_SMBUS_I2C_BLOCK)) - ret |= CYAPA_ADAPTER_FUNC_SMBUS; - return ret; + return 0; } static int cyapa_open(struct input_dev *input) @@ -761,22 +320,49 @@ static int cyapa_open(struct input_dev *input) struct i2c_client *client = cyapa->client; int error; - error = cyapa_set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE); - if (error) { - dev_err(&client->dev, "set active power failed: %d\n", error); + error = mutex_lock_interruptible(&cyapa->state_sync_lock); + if (error) return error; + + if (cyapa->operational) { + /* + * though failed to set active power mode, + * but still may be able to work in lower scan rate + * when in operational mode. + */ + error = cyapa->ops->set_power_mode(cyapa, + PWR_MODE_FULL_ACTIVE, 0); + if (error) { + dev_warn(&client->dev, + "set active power failed: %d\n", error); + goto out; + } + } else { + error = cyapa_reinitialize(cyapa); + if (error || !cyapa->operational) { + error = error ? error : -EAGAIN; + goto out; + } } enable_irq(client->irq); - return 0; +out: + mutex_unlock(&cyapa->state_sync_lock); + return error; } static void cyapa_close(struct input_dev *input) { struct cyapa *cyapa = input_get_drvdata(input); + struct i2c_client *client = cyapa->client; + + mutex_lock(&cyapa->state_sync_lock); - disable_irq(cyapa->client->irq); - cyapa_set_power_mode(cyapa, PWR_MODE_OFF); + disable_irq(client->irq); + if (cyapa->operational) + cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0); + + mutex_unlock(&cyapa->state_sync_lock); } static int cyapa_create_input_dev(struct cyapa *cyapa) @@ -813,7 +399,28 @@ static int cyapa_create_input_dev(struct cyapa *cyapa) 0); input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cyapa->max_abs_y, 0, 0); - input_set_abs_params(input, ABS_MT_PRESSURE, 0, 255, 0, 0); + input_set_abs_params(input, ABS_MT_PRESSURE, 0, cyapa->max_z, 0, 0); + if (cyapa->gen > CYAPA_GEN3) { + input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); + input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0); + /* + * Orientation is the angle between the vertical axis and + * the major axis of the contact ellipse. + * The range is -127 to 127. + * the positive direction is clockwise form the vertical axis. + * If the ellipse of contact degenerates into a circle, + * orientation is reported as 0. + * + * Also, for Gen5 trackpad the accurate of this orientation + * value is value + (-30 ~ 30). + */ + input_set_abs_params(input, ABS_MT_ORIENTATION, + -127, 127, 0, 0); + } + if (cyapa->gen >= CYAPA_GEN5) { + input_set_abs_params(input, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); + input_set_abs_params(input, ABS_MT_WIDTH_MINOR, 0, 255, 0, 0); + } input_abs_set_res(input, ABS_MT_POSITION_X, cyapa->max_abs_x / cyapa->physical_size_x); @@ -838,16 +445,159 @@ static int cyapa_create_input_dev(struct cyapa *cyapa) return error; } + /* Register the device in input subsystem */ + error = input_register_device(input); + if (error) { + dev_err(dev, "failed to register input device: %d\n", error); + return error; + } + cyapa->input = input; return 0; } +/* + * cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time + * + * These are helper functions that convert to and from integer idle + * times and register settings to write to the PowerMode register. + * The trackpad supports between 20ms to 1000ms scan intervals. + * The time will be increased in increments of 10ms from 20ms to 100ms. + * From 100ms to 1000ms, time will be increased in increments of 20ms. + * + * When Idle_Time < 100, the format to convert Idle_Time to Idle_Command is: + * Idle_Command = Idle Time / 10; + * When Idle_Time >= 100, the format to convert Idle_Time to Idle_Command is: + * Idle_Command = Idle Time / 20 + 5; + */ +u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time) +{ + u16 encoded_time; + + sleep_time = clamp_val(sleep_time, 20, 1000); + encoded_time = sleep_time < 100 ? sleep_time / 10 : sleep_time / 20 + 5; + return (encoded_time << 2) & PWR_MODE_MASK; +} + +u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode) +{ + u8 encoded_time = pwr_mode >> 2; + + return (encoded_time < 10) ? encoded_time * 10 + : (encoded_time - 5) * 20; +} + +/* 0 on driver initialize and detected successfully, negative on failure. */ +static int cyapa_initialize(struct cyapa *cyapa) +{ + int error = 0; + + cyapa->state = CYAPA_STATE_NO_DEVICE; + cyapa->gen = CYAPA_GEN_UNKNOWN; + mutex_init(&cyapa->state_sync_lock); + + /* + * Set to hard code default, they will be updated with trackpad set + * default values after probe and initialized. + */ + cyapa->suspend_power_mode = PWR_MODE_SLEEP; + cyapa->suspend_sleep_time = + cyapa_pwr_cmd_to_sleep_time(cyapa->suspend_power_mode); + + /* ops.initialize() is aimed to prepare for module communications. */ + error = cyapa_gen3_ops.initialize(cyapa); + if (error) + return error; + + error = cyapa_detect(cyapa); + if (error) + return error; + + /* Power down the device until we need it. */ + if (cyapa->operational) + cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0); + + return 0; +} + +static int cyapa_reinitialize(struct cyapa *cyapa) +{ + struct device *dev = &cyapa->client->dev; + struct input_dev *input = cyapa->input; + int error; + + /* Avoid command failures when TP was in OFF state. */ + if (cyapa->operational) + cyapa->ops->set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE, 0); + + error = cyapa_detect(cyapa); + if (error) + goto out; + + if (!input && cyapa->operational) { + error = cyapa_create_input_dev(cyapa); + if (error) { + dev_err(dev, "create input_dev instance failed: %d\n", + error); + goto out; + } + } + +out: + if (!input || !input->users) { + /* Reset to power OFF state to save power when no user open. */ + if (cyapa->operational) + cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0); + } + + return error; +} + +static irqreturn_t cyapa_irq(int irq, void *dev_id) +{ + struct cyapa *cyapa = dev_id; + struct device *dev = &cyapa->client->dev; + + if (device_may_wakeup(dev)) + pm_wakeup_event(dev, 0); + + /* Interrupt event maybe cuased by host command to trackpad device. */ + if (cyapa->ops->irq_cmd_handler(cyapa)) { + /* + * Interrupt event maybe from trackpad device input reporting. + */ + if (!cyapa->input) { + /* + * Still in probling or in firware image + * udpating or reading. + */ + cyapa->ops->sort_empty_output_data(cyapa, + NULL, NULL, NULL); + goto out; + } + + if (!cyapa->operational || cyapa->ops->irq_handler(cyapa)) { + if (!mutex_trylock(&cyapa->state_sync_lock)) { + cyapa->ops->sort_empty_output_data(cyapa, + NULL, NULL, NULL); + goto out; + } + cyapa_reinitialize(cyapa); + mutex_unlock(&cyapa->state_sync_lock); + } + } + +out: + return IRQ_HANDLED; +} + static int cyapa_probe(struct i2c_client *client, const struct i2c_device_id *dev_id) { struct device *dev = &client->dev; struct cyapa *cyapa; u8 adapter_func; + union i2c_smbus_data dummy; int error; adapter_func = cyapa_check_adapter_functionality(client); @@ -856,39 +606,30 @@ static int cyapa_probe(struct i2c_client *client, return -EIO; } + /* 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) + return -ENODEV; + cyapa = devm_kzalloc(dev, sizeof(struct cyapa), GFP_KERNEL); if (!cyapa) return -ENOMEM; - cyapa->gen = CYAPA_GEN3; - cyapa->client = client; - i2c_set_clientdata(client, cyapa); - sprintf(cyapa->phys, "i2c-%d-%04x/input0", client->adapter->nr, - client->addr); - /* i2c isn't supported, use smbus */ if (adapter_func == CYAPA_ADAPTER_FUNC_SMBUS) cyapa->smbus = true; - cyapa->state = CYAPA_STATE_NO_DEVICE; - - error = cyapa_check_is_operational(cyapa); - if (error) { - dev_err(dev, "device not operational, %d\n", error); - return error; - } + cyapa->client = client; + i2c_set_clientdata(client, cyapa); + sprintf(cyapa->phys, "i2c-%d-%04x/input0", client->adapter->nr, + client->addr); - /* Power down the device until we need it */ - error = cyapa_set_power_mode(cyapa, PWR_MODE_OFF); + error = cyapa_initialize(cyapa); if (error) { - dev_err(dev, "failed to quiesce the device: %d\n", error); + dev_err(dev, "failed to detect and initialize tp device.\n"); return error; } - error = cyapa_create_input_dev(cyapa); - if (error) - return error; - error = devm_request_threaded_irq(dev, client->irq, NULL, cyapa_irq, IRQF_TRIGGER_FALLING | IRQF_ONESHOT, @@ -901,11 +642,18 @@ static int cyapa_probe(struct i2c_client *client, /* Disable IRQ until the device is opened */ disable_irq(client->irq); - /* Register the device in input subsystem */ - error = input_register_device(cyapa->input); - if (error) { - dev_err(dev, "failed to register input device: %d\n", error); - return error; + /* + * Register the device in the input subsystem when it's operational. + * Otherwise, keep in this driver, so it can be be recovered or updated + * through the sysfs mode and update_fw interfaces by user or apps. + */ + if (cyapa->operational) { + error = cyapa_create_input_dev(cyapa); + if (error) { + dev_err(dev, "create input_dev instance failed: %d\n", + error); + return error; + } } return 0; @@ -915,11 +663,10 @@ static int __maybe_unused cyapa_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct cyapa *cyapa = i2c_get_clientdata(client); - struct input_dev *input = cyapa->input; u8 power_mode; int error; - error = mutex_lock_interruptible(&input->mutex); + error = mutex_lock_interruptible(&cyapa->state_sync_lock); if (error) return error; @@ -929,18 +676,20 @@ static int __maybe_unused cyapa_suspend(struct device *dev) * Set trackpad device to idle mode if wakeup is allowed, * otherwise turn off. */ - power_mode = device_may_wakeup(dev) ? PWR_MODE_IDLE - : PWR_MODE_OFF; - error = cyapa_set_power_mode(cyapa, power_mode); - if (error) - dev_err(dev, "resume: set power mode to %d failed: %d\n", - power_mode, error); + if (cyapa->operational) { + power_mode = device_may_wakeup(dev) ? cyapa->suspend_power_mode + : PWR_MODE_OFF; + error = cyapa->ops->set_power_mode(cyapa, power_mode, + cyapa->suspend_sleep_time); + if (error) + dev_err(dev, "suspend set power mode failed: %d\n", + error); + } if (device_may_wakeup(dev)) cyapa->irq_wake = (enable_irq_wake(client->irq) == 0); - mutex_unlock(&input->mutex); - + mutex_unlock(&cyapa->state_sync_lock); return 0; } @@ -948,25 +697,22 @@ static int __maybe_unused cyapa_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct cyapa *cyapa = i2c_get_clientdata(client); - struct input_dev *input = cyapa->input; - u8 power_mode; int error; - mutex_lock(&input->mutex); + mutex_lock(&cyapa->state_sync_lock); - if (device_may_wakeup(dev) && cyapa->irq_wake) + if (device_may_wakeup(dev) && cyapa->irq_wake) { disable_irq_wake(client->irq); + cyapa->irq_wake = false; + } - power_mode = input->users ? PWR_MODE_FULL_ACTIVE : PWR_MODE_OFF; - error = cyapa_set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE); + error = cyapa_reinitialize(cyapa); if (error) - dev_warn(dev, "resume: set power mode to %d failed: %d\n", - power_mode, error); + dev_warn(dev, "failed to reinitialize TP device: %d\n", error); enable_irq(client->irq); - mutex_unlock(&input->mutex); - + mutex_unlock(&cyapa->state_sync_lock); return 0; } diff --git a/drivers/input/mouse/cyapa.h b/drivers/input/mouse/cyapa.h new file mode 100644 index 000000000000..aab19b7d9357 --- /dev/null +++ b/drivers/input/mouse/cyapa.h @@ -0,0 +1,296 @@ +/* + * Cypress APA trackpad with I2C interface + * + * Author: Dudley Du <dudl@cypress.com> + * + * Copyright (C) 2014 Cypress Semiconductor, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive for + * more details. + */ + +#ifndef _CYAPA_H +#define _CYAPA_H + +#include <linux/firmware.h> + +/* APA trackpad firmware generation number. */ +#define CYAPA_GEN_UNKNOWN 0x00 /* unknown protocol. */ +#define CYAPA_GEN3 0x03 /* support MT-protocol B with tracking ID. */ +#define CYAPA_GEN5 0x05 /* support TrueTouch GEN5 trackpad device. */ + +#define CYAPA_NAME "Cypress APA Trackpad (cyapa)" + +/* + * Macros for SMBus communication + */ +#define SMBUS_READ 0x01 +#define SMBUS_WRITE 0x00 +#define SMBUS_ENCODE_IDX(cmd, idx) ((cmd) | (((idx) & 0x03) << 1)) +#define SMBUS_ENCODE_RW(cmd, rw) ((cmd) | ((rw) & 0x01)) +#define SMBUS_BYTE_BLOCK_CMD_MASK 0x80 +#define SMBUS_GROUP_BLOCK_CMD_MASK 0x40 + +/* Commands for read/write registers of Cypress trackpad */ +#define CYAPA_CMD_SOFT_RESET 0x00 +#define CYAPA_CMD_POWER_MODE 0x01 +#define CYAPA_CMD_DEV_STATUS 0x02 +#define CYAPA_CMD_GROUP_DATA 0x03 +#define CYAPA_CMD_GROUP_CMD 0x04 +#define CYAPA_CMD_GROUP_QUERY 0x05 +#define CYAPA_CMD_BL_STATUS 0x06 +#define CYAPA_CMD_BL_HEAD 0x07 +#define CYAPA_CMD_BL_CMD 0x08 +#define CYAPA_CMD_BL_DATA 0x09 +#define CYAPA_CMD_BL_ALL 0x0a +#define CYAPA_CMD_BLK_PRODUCT_ID 0x0b +#define CYAPA_CMD_BLK_HEAD 0x0c +#define CYAPA_CMD_MAX_BASELINE 0x0d +#define CYAPA_CMD_MIN_BASELINE 0x0e + +#define BL_HEAD_OFFSET 0x00 +#define BL_DATA_OFFSET 0x10 + +#define BL_STATUS_SIZE 3 /* Length of gen3 bootloader status registers */ +#define CYAPA_REG_MAP_SIZE 256 + +/* + * Gen3 Operational Device Status Register + * + * bit 7: Valid interrupt source + * bit 6 - 4: Reserved + * bit 3 - 2: Power status + * bit 1 - 0: Device status + */ +#define REG_OP_STATUS 0x00 +#define OP_STATUS_SRC 0x80 +#define OP_STATUS_POWER 0x0c +#define OP_STATUS_DEV 0x03 +#define OP_STATUS_MASK (OP_STATUS_SRC | OP_STATUS_POWER | OP_STATUS_DEV) + +/* + * Operational Finger Count/Button Flags Register + * + * bit 7 - 4: Number of touched finger + * bit 3: Valid data + * bit 2: Middle Physical Button + * bit 1: Right Physical Button + * bit 0: Left physical Button + */ +#define REG_OP_DATA1 0x01 +#define OP_DATA_VALID 0x08 +#define OP_DATA_MIDDLE_BTN 0x04 +#define OP_DATA_RIGHT_BTN 0x02 +#define OP_DATA_LEFT_BTN 0x01 +#define OP_DATA_BTN_MASK (OP_DATA_MIDDLE_BTN | OP_DATA_RIGHT_BTN | \ + OP_DATA_LEFT_BTN) + +/* + * Write-only command file register used to issue commands and + * parameters to the bootloader. + * The default value read from it is always 0x00. + */ +#define REG_BL_FILE 0x00 +#define BL_FILE 0x00 + +/* + * Bootloader Status Register + * + * bit 7: Busy + * bit 6 - 5: Reserved + * bit 4: Bootloader running + * bit 3 - 2: Reserved + * bit 1: Watchdog Reset + * bit 0: Checksum valid + */ +#define REG_BL_STATUS 0x01 +#define BL_STATUS_REV_6_5 0x60 +#define BL_STATUS_BUSY 0x80 +#define BL_STATUS_RUNNING 0x10 +#define BL_STATUS_REV_3_2 0x0c +#define BL_STATUS_WATCHDOG 0x02 +#define BL_STATUS_CSUM_VALID 0x01 +#define BL_STATUS_REV_MASK (BL_STATUS_WATCHDOG | BL_STATUS_REV_3_2 | \ + BL_STATUS_REV_6_5) + +/* + * Bootloader Error Register + * + * bit 7: Invalid + * bit 6: Invalid security key + * bit 5: Bootloading + * bit 4: Command checksum + * bit 3: Flash protection error + * bit 2: Flash checksum error + * bit 1 - 0: Reserved + */ +#define REG_BL_ERROR 0x02 +#define BL_ERROR_INVALID 0x80 +#define BL_ERROR_INVALID_KEY 0x40 +#define BL_ERROR_BOOTLOADING 0x20 +#define BL_ERROR_CMD_CSUM 0x10 +#define BL_ERROR_FLASH_PROT 0x08 +#define BL_ERROR_FLASH_CSUM 0x04 +#define BL_ERROR_RESERVED 0x03 +#define BL_ERROR_NO_ERR_IDLE 0x00 +#define BL_ERROR_NO_ERR_ACTIVE (BL_ERROR_BOOTLOADING) + +#define CAPABILITY_BTN_SHIFT 3 +#define CAPABILITY_LEFT_BTN_MASK (0x01 << 3) +#define CAPABILITY_RIGHT_BTN_MASK (0x01 << 4) +#define CAPABILITY_MIDDLE_BTN_MASK (0x01 << 5) +#define CAPABILITY_BTN_MASK (CAPABILITY_LEFT_BTN_MASK | \ + CAPABILITY_RIGHT_BTN_MASK | \ + CAPABILITY_MIDDLE_BTN_MASK) + +#define PWR_MODE_MASK 0xfc +#define PWR_MODE_FULL_ACTIVE (0x3f << 2) +#define PWR_MODE_IDLE (0x03 << 2) /* Default rt suspend scanrate: 30ms */ +#define PWR_MODE_SLEEP (0x05 << 2) /* Default suspend scanrate: 50ms */ +#define PWR_MODE_BTN_ONLY (0x01 << 2) +#define PWR_MODE_OFF (0x00 << 2) + +#define PWR_STATUS_MASK 0x0c +#define PWR_STATUS_ACTIVE (0x03 << 2) +#define PWR_STATUS_IDLE (0x02 << 2) +#define PWR_STATUS_BTN_ONLY (0x01 << 2) +#define PWR_STATUS_OFF (0x00 << 2) + +#define AUTOSUSPEND_DELAY 2000 /* unit : ms */ + +#define UNINIT_SLEEP_TIME 0xFFFF +#define UNINIT_PWR_MODE 0xFF + +#define BTN_ONLY_MODE_NAME "buttononly" +#define OFF_MODE_NAME "off" + +/* The touch.id is used as the MT slot id, thus max MT slot is 15 */ +#define CYAPA_MAX_MT_SLOTS 15 + +struct cyapa; + +typedef bool (*cb_sort)(struct cyapa *, u8 *, int); + +struct cyapa_dev_ops { + int (*check_fw)(struct cyapa *, const struct firmware *); + int (*bl_enter)(struct cyapa *); + int (*bl_activate)(struct cyapa *); + int (*bl_initiate)(struct cyapa *, const struct firmware *); + int (*update_fw)(struct cyapa *, const struct firmware *); + int (*bl_deactivate)(struct cyapa *); + + ssize_t (*show_baseline)(struct device *, + struct device_attribute *, char *); + ssize_t (*calibrate_store)(struct device *, + struct device_attribute *, const char *, size_t); + + int (*initialize)(struct cyapa *cyapa); + + int (*state_parse)(struct cyapa *cyapa, u8 *reg_status, int len); + int (*operational_check)(struct cyapa *cyapa); + + int (*irq_handler)(struct cyapa *); + bool (*irq_cmd_handler)(struct cyapa *); + int (*sort_empty_output_data)(struct cyapa *, + u8 *, int *, cb_sort); + + int (*set_power_mode)(struct cyapa *, u8, u16); +}; + +struct cyapa_gen5_cmd_states { + struct mutex cmd_lock; + struct completion cmd_ready; + atomic_t cmd_issued; + u8 in_progress_cmd; + bool is_irq_mode; + + cb_sort resp_sort_func; + u8 *resp_data; + int *resp_len; + + u8 irq_cmd_buf[CYAPA_REG_MAP_SIZE]; + u8 empty_buf[CYAPA_REG_MAP_SIZE]; +}; + +union cyapa_cmd_states { + struct cyapa_gen5_cmd_states gen5; +}; + +enum cyapa_state { + CYAPA_STATE_NO_DEVICE, + CYAPA_STATE_BL_BUSY, + CYAPA_STATE_BL_IDLE, + CYAPA_STATE_BL_ACTIVE, + CYAPA_STATE_OP, + CYAPA_STATE_GEN5_BL, + CYAPA_STATE_GEN5_APP, +}; + +/* The main device structure */ +struct cyapa { + enum cyapa_state state; + u8 status[BL_STATUS_SIZE]; + bool operational; /* true: ready for data reporting; false: not. */ + + struct i2c_client *client; + struct input_dev *input; + char phys[32]; /* Device physical location */ + bool irq_wake; /* Irq wake is enabled */ + bool smbus; + + /* power mode settings */ + u8 suspend_power_mode; + u16 suspend_sleep_time; + u8 dev_pwr_mode; + u16 dev_sleep_time; + + /* Read from query data region. */ + char product_id[16]; + u8 fw_maj_ver; /* Firmware major version. */ + u8 fw_min_ver; /* Firmware minor version. */ + u8 btn_capability; + u8 gen; + int max_abs_x; + int max_abs_y; + int physical_size_x; + int physical_size_y; + + /* Used in ttsp and truetouch based trackpad devices. */ + u8 x_origin; /* X Axis Origin: 0 = left side; 1 = rigth side. */ + u8 y_origin; /* Y Axis Origin: 0 = top; 1 = bottom. */ + int electrodes_x; /* Number of electrodes on the X Axis*/ + int electrodes_y; /* Number of electrodes on the Y Axis*/ + int max_z; + + /* + * Used to synchronize the access or update the device state. + * And since update firmware and read firmware image process will take + * quite long time, maybe more than 10 seconds, so use mutex_lock + * to sync and wait other interface and detecting are done or ready. + */ + struct mutex state_sync_lock; + + const struct cyapa_dev_ops *ops; + + union cyapa_cmd_states cmd_states; +}; + + +ssize_t cyapa_i2c_reg_read_block(struct cyapa *cyapa, u8 reg, size_t len, + u8 *values); +ssize_t cyapa_smbus_read_block(struct cyapa *cyapa, u8 cmd, size_t len, + u8 *values); + +ssize_t cyapa_read_block(struct cyapa *cyapa, u8 cmd_idx, u8 *values); + +int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout); + +u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time); +u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode); + + +extern const char product_id[]; +extern const struct cyapa_dev_ops cyapa_gen3_ops; + +#endif diff --git a/drivers/input/mouse/cyapa_gen3.c b/drivers/input/mouse/cyapa_gen3.c new file mode 100644 index 000000000000..1b62c7d585a2 --- /dev/null +++ b/drivers/input/mouse/cyapa_gen3.c @@ -0,0 +1,807 @@ +/* + * Cypress APA trackpad with I2C interface + * + * Author: Dudley Du <dudl@cypress.com> + * Further cleanup and restructuring by: + * Daniel Kurtz <djkurtz@chromium.org> + * Benson Leung <bleung@chromium.org> + * + * Copyright (C) 2011-2014 Cypress Semiconductor, Inc. + * Copyright (C) 2011-2012 Google, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive for + * more details. + */ + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/input.h> +#include <linux/input/mt.h> +#include <linux/module.h> +#include <linux/slab.h> +#include "cyapa.h" + + +#define GEN3_MAX_FINGERS 5 +#define GEN3_FINGER_NUM(x) (((x) >> 4) & 0x07) + +#define BLK_HEAD_BYTES 32 + +/* Macro for register map group offset. */ +#define PRODUCT_ID_SIZE 16 +#define QUERY_DATA_SIZE 27 +#define REG_PROTOCOL_GEN_QUERY_OFFSET 20 + +#define REG_OFFSET_DATA_BASE 0x0000 +#define REG_OFFSET_COMMAND_BASE 0x0028 +#define REG_OFFSET_QUERY_BASE 0x002a + +#define CYAPA_OFFSET_SOFT_RESET REG_OFFSET_COMMAND_BASE +#define OP_RECALIBRATION_MASK 0x80 +#define OP_REPORT_BASELINE_MASK 0x40 +#define REG_OFFSET_MAX_BASELINE 0x0026 +#define REG_OFFSET_MIN_BASELINE 0x0027 + +#define REG_OFFSET_POWER_MODE (REG_OFFSET_COMMAND_BASE + 1) +#define SET_POWER_MODE_DELAY 10000 /* Unit: us */ +#define SET_POWER_MODE_TRIES 5 + +#define GEN3_BL_CMD_CHECKSUM_SEED 0xff +#define GEN3_BL_CMD_INITIATE_BL 0x38 +#define GEN3_BL_CMD_WRITE_BLOCK 0x39 +#define GEN3_BL_CMD_VERIFY_BLOCK 0x3a +#define GEN3_BL_CMD_TERMINATE_BL 0x3b +#define GEN3_BL_CMD_LAUNCH_APP 0xa5 + +/* + * CYAPA trackpad device states. + * Used in register 0x00, bit1-0, DeviceStatus field. + * Other values indicate device is in an abnormal state and must be reset. + */ +#define CYAPA_DEV_NORMAL 0x03 +#define CYAPA_DEV_BUSY 0x01 + +#define CYAPA_FW_BLOCK_SIZE 64 +#define CYAPA_FW_READ_SIZE 16 +#define CYAPA_FW_HDR_START 0x0780 +#define CYAPA_FW_HDR_BLOCK_COUNT 2 +#define CYAPA_FW_HDR_BLOCK_START (CYAPA_FW_HDR_START / CYAPA_FW_BLOCK_SIZE) +#define CYAPA_FW_HDR_SIZE (CYAPA_FW_HDR_BLOCK_COUNT * \ + CYAPA_FW_BLOCK_SIZE) +#define CYAPA_FW_DATA_START 0x0800 +#define CYAPA_FW_DATA_BLOCK_COUNT 480 +#define CYAPA_FW_DATA_BLOCK_START (CYAPA_FW_DATA_START / CYAPA_FW_BLOCK_SIZE) +#define CYAPA_FW_DATA_SIZE (CYAPA_FW_DATA_BLOCK_COUNT * \ + CYAPA_FW_BLOCK_SIZE) +#define CYAPA_FW_SIZE (CYAPA_FW_HDR_SIZE + CYAPA_FW_DATA_SIZE) +#define CYAPA_CMD_LEN 16 + +#define GEN3_BL_IDLE_FW_MAJ_VER_OFFSET 0x0b +#define GEN3_BL_IDLE_FW_MIN_VER_OFFSET (GEN3_BL_IDLE_FW_MAJ_VER_OFFSET + 1) + + +struct cyapa_touch { + /* + * high bits or x/y position value + * bit 7 - 4: high 4 bits of x position value + * bit 3 - 0: high 4 bits of y position value + */ + u8 xy_hi; + u8 x_lo; /* low 8 bits of x position value. */ + u8 y_lo; /* low 8 bits of y position value. */ + u8 pressure; + /* id range is 1 - 15. It is incremented with every new touch. */ + u8 id; +} __packed; + +struct cyapa_reg_data { + /* + * bit 0 - 1: device status + * bit 3 - 2: power mode + * bit 6 - 4: reserved + * bit 7: interrupt valid bit + */ + u8 device_status; + /* + * bit 7 - 4: number of fingers currently touching pad + * bit 3: valid data check bit + * bit 2: middle mechanism button state if exists + * bit 1: right mechanism button state if exists + * bit 0: left mechanism button state if exists + */ + u8 finger_btn; + /* CYAPA reports up to 5 touches per packet. */ + struct cyapa_touch touches[5]; +} __packed; + +static const u8 bl_activate[] = { 0x00, 0xff, 0x38, 0x00, 0x01, 0x02, 0x03, + 0x04, 0x05, 0x06, 0x07 }; +static const u8 bl_deactivate[] = { 0x00, 0xff, 0x3b, 0x00, 0x01, 0x02, 0x03, + 0x04, 0x05, 0x06, 0x07 }; +static const u8 bl_exit[] = { 0x00, 0xff, 0xa5, 0x00, 0x01, 0x02, 0x03, 0x04, + 0x05, 0x06, 0x07 }; + + + /* for byte read/write command */ +#define CMD_RESET 0 +#define CMD_POWER_MODE 1 +#define CMD_DEV_STATUS 2 +#define CMD_REPORT_MAX_BASELINE 3 +#define CMD_REPORT_MIN_BASELINE 4 +#define SMBUS_BYTE_CMD(cmd) (((cmd) & 0x3f) << 1) +#define CYAPA_SMBUS_RESET SMBUS_BYTE_CMD(CMD_RESET) +#define CYAPA_SMBUS_POWER_MODE SMBUS_BYTE_CMD(CMD_POWER_MODE) +#define CYAPA_SMBUS_DEV_STATUS SMBUS_BYTE_CMD(CMD_DEV_STATUS) +#define CYAPA_SMBUS_MAX_BASELINE SMBUS_BYTE_CMD(CMD_REPORT_MAX_BASELINE) +#define CYAPA_SMBUS_MIN_BASELINE SMBUS_BYTE_CMD(CMD_REPORT_MIN_BASELINE) + + /* for group registers read/write command */ +#define REG_GROUP_DATA 0 +#define REG_GROUP_CMD 2 +#define REG_GROUP_QUERY 3 +#define SMBUS_GROUP_CMD(grp) (0x80 | (((grp) & 0x07) << 3)) +#define CYAPA_SMBUS_GROUP_DATA SMBUS_GROUP_CMD(REG_GROUP_DATA) +#define CYAPA_SMBUS_GROUP_CMD SMBUS_GROUP_CMD(REG_GROUP_CMD) +#define CYAPA_SMBUS_GROUP_QUERY SMBUS_GROUP_CMD(REG_GROUP_QUERY) + + /* for register block read/write command */ +#define CMD_BL_STATUS 0 +#define CMD_BL_HEAD 1 +#define CMD_BL_CMD 2 +#define CMD_BL_DATA 3 +#define CMD_BL_ALL 4 +#define CMD_BLK_PRODUCT_ID 5 +#define CMD_BLK_HEAD 6 +#define SMBUS_BLOCK_CMD(cmd) (0xc0 | (((cmd) & 0x1f) << 1)) + +/* register block read/write command in bootloader mode */ +#define CYAPA_SMBUS_BL_STATUS SMBUS_BLOCK_CMD(CMD_BL_STATUS) +#define CYAPA_SMBUS_BL_HEAD SMBUS_BLOCK_CMD(CMD_BL_HEAD) +#define CYAPA_SMBUS_BL_CMD SMBUS_BLOCK_CMD(CMD_BL_CMD) +#define CYAPA_SMBUS_BL_DATA SMBUS_BLOCK_CMD(CMD_BL_DATA) +#define CYAPA_SMBUS_BL_ALL SMBUS_BLOCK_CMD(CMD_BL_ALL) + +/* register block read/write command in operational mode */ +#define CYAPA_SMBUS_BLK_PRODUCT_ID SMBUS_BLOCK_CMD(CMD_BLK_PRODUCT_ID) +#define CYAPA_SMBUS_BLK_HEAD SMBUS_BLOCK_CMD(CMD_BLK_HEAD) + + /* for byte read/write command */ +#define CMD_RESET 0 +#define CMD_POWER_MODE 1 +#define CMD_DEV_STATUS 2 +#define CMD_REPORT_MAX_BASELINE 3 +#define CMD_REPORT_MIN_BASELINE 4 +#define SMBUS_BYTE_CMD(cmd) (((cmd) & 0x3f) << 1) +#define CYAPA_SMBUS_RESET SMBUS_BYTE_CMD(CMD_RESET) +#define CYAPA_SMBUS_POWER_MODE SMBUS_BYTE_CMD(CMD_POWER_MODE) +#define CYAPA_SMBUS_DEV_STATUS SMBUS_BYTE_CMD(CMD_DEV_STATUS) +#define CYAPA_SMBUS_MAX_BASELINE SMBUS_BYTE_CMD(CMD_REPORT_MAX_BASELINE) +#define CYAPA_SMBUS_MIN_BASELINE SMBUS_BYTE_CMD(CMD_REPORT_MIN_BASELINE) + + /* for group registers read/write command */ +#define REG_GROUP_DATA 0 +#define REG_GROUP_CMD 2 +#define REG_GROUP_QUERY 3 +#define SMBUS_GROUP_CMD(grp) (0x80 | (((grp) & 0x07) << 3)) +#define CYAPA_SMBUS_GROUP_DATA SMBUS_GROUP_CMD(REG_GROUP_DATA) +#define CYAPA_SMBUS_GROUP_CMD SMBUS_GROUP_CMD(REG_GROUP_CMD) +#define CYAPA_SMBUS_GROUP_QUERY SMBUS_GROUP_CMD(REG_GROUP_QUERY) + + /* for register block read/write command */ +#define CMD_BL_STATUS 0 +#define CMD_BL_HEAD 1 +#define CMD_BL_CMD 2 +#define CMD_BL_DATA 3 +#define CMD_BL_ALL 4 +#define CMD_BLK_PRODUCT_ID 5 +#define CMD_BLK_HEAD 6 +#define SMBUS_BLOCK_CMD(cmd) (0xc0 | (((cmd) & 0x1f) << 1)) + +/* register block read/write command in bootloader mode */ +#define CYAPA_SMBUS_BL_STATUS SMBUS_BLOCK_CMD(CMD_BL_STATUS) +#define CYAPA_SMBUS_BL_HEAD SMBUS_BLOCK_CMD(CMD_BL_HEAD) +#define CYAPA_SMBUS_BL_CMD SMBUS_BLOCK_CMD(CMD_BL_CMD) +#define CYAPA_SMBUS_BL_DATA SMBUS_BLOCK_CMD(CMD_BL_DATA) +#define CYAPA_SMBUS_BL_ALL SMBUS_BLOCK_CMD(CMD_BL_ALL) + +/* register block read/write command in operational mode */ +#define CYAPA_SMBUS_BLK_PRODUCT_ID SMBUS_BLOCK_CMD(CMD_BLK_PRODUCT_ID) +#define CYAPA_SMBUS_BLK_HEAD SMBUS_BLOCK_CMD(CMD_BLK_HEAD) + +struct cyapa_cmd_len { + u8 cmd; + u8 len; +}; + +/* maps generic CYAPA_CMD_* code to the I2C equivalent */ +static const struct cyapa_cmd_len cyapa_i2c_cmds[] = { + { CYAPA_OFFSET_SOFT_RESET, 1 }, /* CYAPA_CMD_SOFT_RESET */ + { REG_OFFSET_COMMAND_BASE + 1, 1 }, /* CYAPA_CMD_POWER_MODE */ + { REG_OFFSET_DATA_BASE, 1 }, /* CYAPA_CMD_DEV_STATUS */ + { REG_OFFSET_DATA_BASE, sizeof(struct cyapa_reg_data) }, + /* CYAPA_CMD_GROUP_DATA */ + { REG_OFFSET_COMMAND_BASE, 0 }, /* CYAPA_CMD_GROUP_CMD */ + { REG_OFFSET_QUERY_BASE, QUERY_DATA_SIZE }, /* CYAPA_CMD_GROUP_QUERY */ + { BL_HEAD_OFFSET, 3 }, /* CYAPA_CMD_BL_STATUS */ + { BL_HEAD_OFFSET, 16 }, /* CYAPA_CMD_BL_HEAD */ + { BL_HEAD_OFFSET, 16 }, /* CYAPA_CMD_BL_CMD */ + { BL_DATA_OFFSET, 16 }, /* CYAPA_CMD_BL_DATA */ + { BL_HEAD_OFFSET, 32 }, /* CYAPA_CMD_BL_ALL */ + { REG_OFFSET_QUERY_BASE, PRODUCT_ID_SIZE }, + /* CYAPA_CMD_BLK_PRODUCT_ID */ + { REG_OFFSET_DATA_BASE, 32 }, /* CYAPA_CMD_BLK_HEAD */ + { REG_OFFSET_MAX_BASELINE, 1 }, /* CYAPA_CMD_MAX_BASELINE */ + { REG_OFFSET_MIN_BASELINE, 1 }, /* CYAPA_CMD_MIN_BASELINE */ +}; + +static const struct cyapa_cmd_len cyapa_smbus_cmds[] = { + { CYAPA_SMBUS_RESET, 1 }, /* CYAPA_CMD_SOFT_RESET */ + { CYAPA_SMBUS_POWER_MODE, 1 }, /* CYAPA_CMD_POWER_MODE */ + { CYAPA_SMBUS_DEV_STATUS, 1 }, /* CYAPA_CMD_DEV_STATUS */ + { CYAPA_SMBUS_GROUP_DATA, sizeof(struct cyapa_reg_data) }, + /* CYAPA_CMD_GROUP_DATA */ + { CYAPA_SMBUS_GROUP_CMD, 2 }, /* CYAPA_CMD_GROUP_CMD */ + { CYAPA_SMBUS_GROUP_QUERY, QUERY_DATA_SIZE }, + /* CYAPA_CMD_GROUP_QUERY */ + { CYAPA_SMBUS_BL_STATUS, 3 }, /* CYAPA_CMD_BL_STATUS */ + { CYAPA_SMBUS_BL_HEAD, 16 }, /* CYAPA_CMD_BL_HEAD */ + { CYAPA_SMBUS_BL_CMD, 16 }, /* CYAPA_CMD_BL_CMD */ + { CYAPA_SMBUS_BL_DATA, 16 }, /* CYAPA_CMD_BL_DATA */ + { CYAPA_SMBUS_BL_ALL, 32 }, /* CYAPA_CMD_BL_ALL */ + { CYAPA_SMBUS_BLK_PRODUCT_ID, PRODUCT_ID_SIZE }, + /* CYAPA_CMD_BLK_PRODUCT_ID */ + { CYAPA_SMBUS_BLK_HEAD, 16 }, /* CYAPA_CMD_BLK_HEAD */ + { CYAPA_SMBUS_MAX_BASELINE, 1 }, /* CYAPA_CMD_MAX_BASELINE */ + { CYAPA_SMBUS_MIN_BASELINE, 1 }, /* CYAPA_CMD_MIN_BASELINE */ +}; + + +/* + * cyapa_smbus_read_block - perform smbus block read command + * @cyapa - private data structure of the driver + * @cmd - the properly encoded smbus command + * @len - expected length of smbus command result + * @values - buffer to store smbus command result + * + * Returns negative errno, else the number of bytes written. + * + * Note: + * In trackpad device, the memory block allocated for I2C register map + * is 256 bytes, so the max read block for I2C bus is 256 bytes. + */ +ssize_t cyapa_smbus_read_block(struct cyapa *cyapa, u8 cmd, size_t len, + u8 *values) +{ + ssize_t ret; + u8 index; + u8 smbus_cmd; + u8 *buf; + struct i2c_client *client = cyapa->client; + + if (!(SMBUS_BYTE_BLOCK_CMD_MASK & cmd)) + return -EINVAL; + + if (SMBUS_GROUP_BLOCK_CMD_MASK & cmd) { + /* read specific block registers command. */ + smbus_cmd = SMBUS_ENCODE_RW(cmd, SMBUS_READ); + ret = i2c_smbus_read_block_data(client, smbus_cmd, values); + goto out; + } + + ret = 0; + for (index = 0; index * I2C_SMBUS_BLOCK_MAX < len; index++) { + smbus_cmd = SMBUS_ENCODE_IDX(cmd, index); + smbus_cmd = SMBUS_ENCODE_RW(smbus_cmd, SMBUS_READ); + buf = values + I2C_SMBUS_BLOCK_MAX * index; + ret = i2c_smbus_read_block_data(client, smbus_cmd, buf); + if (ret < 0) + goto out; + } + +out: + return ret > 0 ? len : ret; +} + +static s32 cyapa_read_byte(struct cyapa *cyapa, u8 cmd_idx) +{ + u8 cmd; + + if (cyapa->smbus) { + cmd = cyapa_smbus_cmds[cmd_idx].cmd; + cmd = SMBUS_ENCODE_RW(cmd, SMBUS_READ); + } else { + cmd = cyapa_i2c_cmds[cmd_idx].cmd; + } + return i2c_smbus_read_byte_data(cyapa->client, cmd); +} + +static s32 cyapa_write_byte(struct cyapa *cyapa, u8 cmd_idx, u8 value) +{ + u8 cmd; + + if (cyapa->smbus) { + cmd = cyapa_smbus_cmds[cmd_idx].cmd; + cmd = SMBUS_ENCODE_RW(cmd, SMBUS_WRITE); + } else { + cmd = cyapa_i2c_cmds[cmd_idx].cmd; + } + return i2c_smbus_write_byte_data(cyapa->client, cmd, value); +} + +ssize_t cyapa_i2c_reg_read_block(struct cyapa *cyapa, u8 reg, size_t len, + u8 *values) +{ + return i2c_smbus_read_i2c_block_data(cyapa->client, reg, len, values); +} + +static ssize_t cyapa_i2c_reg_write_block(struct cyapa *cyapa, u8 reg, + size_t len, const u8 *values) +{ + return i2c_smbus_write_i2c_block_data(cyapa->client, reg, len, values); +} + +ssize_t cyapa_read_block(struct cyapa *cyapa, u8 cmd_idx, u8 *values) +{ + u8 cmd; + size_t len; + + if (cyapa->smbus) { + cmd = cyapa_smbus_cmds[cmd_idx].cmd; + len = cyapa_smbus_cmds[cmd_idx].len; + return cyapa_smbus_read_block(cyapa, cmd, len, values); + } + cmd = cyapa_i2c_cmds[cmd_idx].cmd; + len = cyapa_i2c_cmds[cmd_idx].len; + return cyapa_i2c_reg_read_block(cyapa, cmd, len, values); +} + +/* + * Determine the Gen3 trackpad device's current operating state. + * + */ +static int cyapa_gen3_state_parse(struct cyapa *cyapa, u8 *reg_data, int len) +{ + cyapa->state = CYAPA_STATE_NO_DEVICE; + + /* Parse based on Gen3 characteristic registers and bits */ + if (reg_data[REG_BL_FILE] == BL_FILE && + reg_data[REG_BL_ERROR] == BL_ERROR_NO_ERR_IDLE && + (reg_data[REG_BL_STATUS] == + (BL_STATUS_RUNNING | BL_STATUS_CSUM_VALID) || + reg_data[REG_BL_STATUS] == BL_STATUS_RUNNING)) { + /* + * Normal state after power on or reset, + * REG_BL_STATUS == 0x11, firmware image checksum is valid. + * REG_BL_STATUS == 0x10, firmware image checksum is invalid. + */ + cyapa->gen = CYAPA_GEN3; + cyapa->state = CYAPA_STATE_BL_IDLE; + } else if (reg_data[REG_BL_FILE] == BL_FILE && + (reg_data[REG_BL_STATUS] & BL_STATUS_RUNNING) == + BL_STATUS_RUNNING) { + cyapa->gen = CYAPA_GEN3; + if (reg_data[REG_BL_STATUS] & BL_STATUS_BUSY) { + cyapa->state = CYAPA_STATE_BL_BUSY; + } else { + if ((reg_data[REG_BL_ERROR] & BL_ERROR_BOOTLOADING) == + BL_ERROR_BOOTLOADING) + cyapa->state = CYAPA_STATE_BL_ACTIVE; + else + cyapa->state = CYAPA_STATE_BL_IDLE; + } + } else if ((reg_data[REG_OP_STATUS] & OP_STATUS_SRC) && + (reg_data[REG_OP_DATA1] & OP_DATA_VALID)) { + /* + * Normal state when running in operational mode, + * may also not in full power state or + * busying in command process. + */ + if (GEN3_FINGER_NUM(reg_data[REG_OP_DATA1]) <= + GEN3_MAX_FINGERS) { + /* Finger number data is valid. */ + cyapa->gen = CYAPA_GEN3; + cyapa->state = CYAPA_STATE_OP; + } + } else if (reg_data[REG_OP_STATUS] == 0x0C && + reg_data[REG_OP_DATA1] == 0x08) { + /* Op state when first two registers overwritten with 0x00 */ + cyapa->gen = CYAPA_GEN3; + cyapa->state = CYAPA_STATE_OP; + } else if (reg_data[REG_BL_STATUS] & + (BL_STATUS_RUNNING | BL_STATUS_BUSY)) { + cyapa->gen = CYAPA_GEN3; + cyapa->state = CYAPA_STATE_BL_BUSY; + } + + if (cyapa->gen == CYAPA_GEN3 && (cyapa->state == CYAPA_STATE_OP || + cyapa->state == CYAPA_STATE_BL_IDLE || + cyapa->state == CYAPA_STATE_BL_ACTIVE || + cyapa->state == CYAPA_STATE_BL_BUSY)) + return 0; + + return -EAGAIN; +} + +static int cyapa_gen3_bl_deactivate(struct cyapa *cyapa) +{ + int error; + + error = cyapa_i2c_reg_write_block(cyapa, 0, sizeof(bl_deactivate), + bl_deactivate); + if (error) + return error; + + /* Wait for bootloader to switch to idle state; should take < 100ms */ + msleep(100); + error = cyapa_poll_state(cyapa, 500); + if (error) + return error; + if (cyapa->state != CYAPA_STATE_BL_IDLE) + return -EAGAIN; + return 0; +} + +/* + * Exit bootloader + * + * Send bl_exit command, then wait 50 - 100 ms to let device transition to + * operational mode. If this is the first time the device's firmware is + * running, it can take up to 2 seconds to calibrate its sensors. So, poll + * the device's new state for up to 2 seconds. + * + * Returns: + * -EIO failure while reading from device + * -EAGAIN device is stuck in bootloader, b/c it has invalid firmware + * 0 device is supported and in operational mode + */ +static int cyapa_gen3_bl_exit(struct cyapa *cyapa) +{ + int error; + + error = cyapa_i2c_reg_write_block(cyapa, 0, sizeof(bl_exit), bl_exit); + if (error) + return error; + + /* + * Wait for bootloader to exit, and operation mode to start. + * Normally, this takes at least 50 ms. + */ + usleep_range(50000, 100000); + /* + * In addition, when a device boots for the first time after being + * updated to new firmware, it must first calibrate its sensors, which + * can take up to an additional 2 seconds. If the device power is + * running low, this may take even longer. + */ + error = cyapa_poll_state(cyapa, 4000); + if (error < 0) + return error; + if (cyapa->state != CYAPA_STATE_OP) + return -EAGAIN; + + return 0; +} + +/* + * cyapa_get_wait_time_for_pwr_cmd + * + * Compute the amount of time we need to wait after updating the touchpad + * power mode. The touchpad needs to consume the incoming power mode set + * command at the current clock rate. + */ + +static u16 cyapa_get_wait_time_for_pwr_cmd(u8 pwr_mode) +{ + switch (pwr_mode) { + case PWR_MODE_FULL_ACTIVE: return 20; + case PWR_MODE_BTN_ONLY: return 20; + case PWR_MODE_OFF: return 20; + default: return cyapa_pwr_cmd_to_sleep_time(pwr_mode) + 50; + } +} + +/* + * Set device power mode + * + * Write to the field to configure power state. Power states include : + * Full : Max scans and report rate. + * Idle : Report rate set by user specified time. + * ButtonOnly : No scans for fingers. When the button is triggered, + * a slave interrupt is asserted to notify host to wake up. + * Off : Only awake for i2c commands from host. No function for button + * or touch sensors. + * + * The power_mode command should conform to the following : + * Full : 0x3f + * Idle : Configurable from 20 to 1000ms. See note below for + * cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time + * ButtonOnly : 0x01 + * Off : 0x00 + * + * Device power mode can only be set when device is in operational mode. + */ +static int cyapa_gen3_set_power_mode(struct cyapa *cyapa, u8 power_mode, + u16 always_unused) +{ + int ret; + u8 power; + int tries; + u16 sleep_time; + + always_unused = 0; + if (cyapa->state != CYAPA_STATE_OP) + return 0; + + tries = SET_POWER_MODE_TRIES; + while (tries--) { + ret = cyapa_read_byte(cyapa, CYAPA_CMD_POWER_MODE); + if (ret >= 0) + break; + usleep_range(SET_POWER_MODE_DELAY, 2 * SET_POWER_MODE_DELAY); + } + if (ret < 0) + return ret; + + /* + * Return early if the power mode to set is the same as the current + * one. + */ + if ((ret & PWR_MODE_MASK) == power_mode) + return 0; + + sleep_time = cyapa_get_wait_time_for_pwr_cmd(ret & PWR_MODE_MASK); + power = ret; + power &= ~PWR_MODE_MASK; + power |= power_mode & PWR_MODE_MASK; + tries = SET_POWER_MODE_TRIES; + while (tries--) { + ret = cyapa_write_byte(cyapa, CYAPA_CMD_POWER_MODE, power); + if (!ret) + break; + usleep_range(SET_POWER_MODE_DELAY, 2 * SET_POWER_MODE_DELAY); + } + + /* + * Wait for the newly set power command to go in at the previous + * clock speed (scanrate) used by the touchpad firmware. Not + * doing so before issuing the next command may result in errors + * depending on the command's content. + */ + msleep(sleep_time); + return ret; +} + +static int cyapa_gen3_get_query_data(struct cyapa *cyapa) +{ + u8 query_data[QUERY_DATA_SIZE]; + int ret; + + if (cyapa->state != CYAPA_STATE_OP) + return -EBUSY; + + ret = cyapa_read_block(cyapa, CYAPA_CMD_GROUP_QUERY, query_data); + if (ret != QUERY_DATA_SIZE) + return (ret < 0) ? ret : -EIO; + + memcpy(&cyapa->product_id[0], &query_data[0], 5); + cyapa->product_id[5] = '-'; + memcpy(&cyapa->product_id[6], &query_data[5], 6); + cyapa->product_id[12] = '-'; + memcpy(&cyapa->product_id[13], &query_data[11], 2); + cyapa->product_id[15] = '\0'; + + cyapa->fw_maj_ver = query_data[15]; + cyapa->fw_min_ver = query_data[16]; + + cyapa->btn_capability = query_data[19] & CAPABILITY_BTN_MASK; + + cyapa->gen = query_data[20] & 0x0f; + + cyapa->max_abs_x = ((query_data[21] & 0xf0) << 4) | query_data[22]; + cyapa->max_abs_y = ((query_data[21] & 0x0f) << 8) | query_data[23]; + + cyapa->physical_size_x = + ((query_data[24] & 0xf0) << 4) | query_data[25]; + cyapa->physical_size_y = + ((query_data[24] & 0x0f) << 8) | query_data[26]; + + cyapa->max_z = 255; + + return 0; +} + +static int cyapa_gen3_bl_query_data(struct cyapa *cyapa) +{ + u8 bl_data[CYAPA_CMD_LEN]; + int ret; + + ret = cyapa_i2c_reg_read_block(cyapa, 0, CYAPA_CMD_LEN, bl_data); + if (ret != CYAPA_CMD_LEN) + return (ret < 0) ? ret : -EIO; + + /* + * This value will be updated again when entered application mode. + * If TP failed to enter application mode, this fw version values + * can be used as a reference. + * This firmware version valid when fw image checksum is valid. + */ + if (bl_data[REG_BL_STATUS] == + (BL_STATUS_RUNNING | BL_STATUS_CSUM_VALID)) { + cyapa->fw_maj_ver = bl_data[GEN3_BL_IDLE_FW_MAJ_VER_OFFSET]; + cyapa->fw_min_ver = bl_data[GEN3_BL_IDLE_FW_MIN_VER_OFFSET]; + } + + return 0; +} + +/* + * Check if device is operational. + * + * An operational device is responding, has exited bootloader, and has + * firmware supported by this driver. + * + * Returns: + * -EBUSY no device or in bootloader + * -EIO failure while reading from device + * -EAGAIN device is still in bootloader + * if ->state = CYAPA_STATE_BL_IDLE, device has invalid firmware + * -EINVAL device is in operational mode, but not supported by this driver + * 0 device is supported + */ +static int cyapa_gen3_do_operational_check(struct cyapa *cyapa) +{ + struct device *dev = &cyapa->client->dev; + int error; + + switch (cyapa->state) { + case CYAPA_STATE_BL_ACTIVE: + error = cyapa_gen3_bl_deactivate(cyapa); + if (error) { + dev_err(dev, "failed to bl_deactivate: %d\n", error); + return error; + } + + /* Fallthrough state */ + case CYAPA_STATE_BL_IDLE: + /* Try to get firmware version in bootloader mode. */ + cyapa_gen3_bl_query_data(cyapa); + + error = cyapa_gen3_bl_exit(cyapa); + if (error) { + dev_err(dev, "failed to bl_exit: %d\n", error); + return error; + } + + /* Fallthrough state */ + case CYAPA_STATE_OP: + /* + * Reading query data before going back to the full mode + * may cause problems, so we set the power mode first here. + */ + error = cyapa_gen3_set_power_mode(cyapa, + PWR_MODE_FULL_ACTIVE, 0); + if (error) + dev_err(dev, "%s: set full power mode failed: %d\n", + __func__, error); + error = cyapa_gen3_get_query_data(cyapa); + if (error < 0) + return error; + + /* Only support firmware protocol gen3 */ + if (cyapa->gen != CYAPA_GEN3) { + dev_err(dev, "unsupported protocol version (%d)", + cyapa->gen); + return -EINVAL; + } + + /* Only support product ID starting with CYTRA */ + if (memcmp(cyapa->product_id, product_id, + strlen(product_id)) != 0) { + dev_err(dev, "unsupported product ID (%s)\n", + cyapa->product_id); + return -EINVAL; + } + + return 0; + + default: + return -EIO; + } + return 0; +} + +/* + * Return false, do not continue process + * Return true, continue process. + */ +static bool cyapa_gen3_irq_cmd_handler(struct cyapa *cyapa) +{ + /* Not gen3 irq command response, skip for continue. */ + if (cyapa->gen != CYAPA_GEN3) + return true; + + if (cyapa->operational) + return true; + + /* + * Driver in detecting or other interface function processing, + * so, stop cyapa_gen3_irq_handler to continue process to + * avoid unwanted to error detecting and processing. + * + * And also, avoid the periodicly accerted interrupts to be processed + * as touch inputs when gen3 failed to launch into application mode, + * which will cause gen3 stays in bootloader mode. + */ + return false; +} + +static int cyapa_gen3_irq_handler(struct cyapa *cyapa) +{ + struct input_dev *input = cyapa->input; + struct device *dev = &cyapa->client->dev; + struct cyapa_reg_data data; + int num_fingers; + int ret; + int i; + + ret = cyapa_read_block(cyapa, CYAPA_CMD_GROUP_DATA, (u8 *)&data); + if (ret != sizeof(data)) { + dev_err(dev, "failed to read report data, (%d)\n", ret); + return -EINVAL; + } + + if ((data.device_status & OP_STATUS_SRC) != OP_STATUS_SRC || + (data.device_status & OP_STATUS_DEV) != CYAPA_DEV_NORMAL || + (data.finger_btn & OP_DATA_VALID) != OP_DATA_VALID) { + dev_err(dev, "invalid device state bytes, %02x %02x\n", + data.device_status, data.finger_btn); + return -EINVAL; + } + + num_fingers = (data.finger_btn >> 4) & 0x0f; + for (i = 0; i < num_fingers; i++) { + const struct cyapa_touch *touch = &data.touches[i]; + /* Note: touch->id range is 1 to 15; slots are 0 to 14. */ + int slot = touch->id - 1; + + input_mt_slot(input, slot); + input_mt_report_slot_state(input, MT_TOOL_FINGER, true); + input_report_abs(input, ABS_MT_POSITION_X, + ((touch->xy_hi & 0xf0) << 4) | touch->x_lo); + input_report_abs(input, ABS_MT_POSITION_Y, + ((touch->xy_hi & 0x0f) << 8) | touch->y_lo); + input_report_abs(input, ABS_MT_PRESSURE, touch->pressure); + } + + input_mt_sync_frame(input); + + if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK) + input_report_key(input, BTN_LEFT, + !!(data.finger_btn & OP_DATA_LEFT_BTN)); + if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK) + input_report_key(input, BTN_MIDDLE, + !!(data.finger_btn & OP_DATA_MIDDLE_BTN)); + if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK) + input_report_key(input, BTN_RIGHT, + !!(data.finger_btn & OP_DATA_RIGHT_BTN)); + input_sync(input); + + return 0; +} + +static int cyapa_gen3_initialize(struct cyapa *cyapa) { return 0; } +static int cyapa_gen3_empty_output_data(struct cyapa *cyapa, + u8 *buf, int *len, cb_sort func) { return 0; } + +const struct cyapa_dev_ops cyapa_gen3_ops = { + .initialize = cyapa_gen3_initialize, + + .state_parse = cyapa_gen3_state_parse, + .operational_check = cyapa_gen3_do_operational_check, + + .irq_handler = cyapa_gen3_irq_handler, + .irq_cmd_handler = cyapa_gen3_irq_cmd_handler, + .sort_empty_output_data = cyapa_gen3_empty_output_data, + .set_power_mode = cyapa_gen3_set_power_mode, +}; 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