diff options
Diffstat (limited to 'drivers/input/touchscreen/cyttsp5.c')
| -rw-r--r-- | drivers/input/touchscreen/cyttsp5.c | 86 |
1 files changed, 79 insertions, 7 deletions
diff --git a/drivers/input/touchscreen/cyttsp5.c b/drivers/input/touchscreen/cyttsp5.c index 30102cb80fac..b461ded946fc 100644 --- a/drivers/input/touchscreen/cyttsp5.c +++ b/drivers/input/touchscreen/cyttsp5.c @@ -43,6 +43,7 @@ #define HID_DESC_REG 0x1 #define HID_INPUT_REG 0x3 #define HID_OUTPUT_REG 0x4 +#define HID_COMMAND_REG 0x5 #define REPORT_ID_TOUCH 0x1 #define REPORT_ID_BTN 0x3 @@ -68,6 +69,7 @@ #define HID_APP_OUTPUT_REPORT_ID 0x2F #define HID_BL_RESPONSE_REPORT_ID 0x30 #define HID_BL_OUTPUT_REPORT_ID 0x40 +#define HID_RESPONSE_REPORT_ID 0xF0 #define HID_OUTPUT_RESPONSE_REPORT_OFFSET 2 #define HID_OUTPUT_RESPONSE_CMD_OFFSET 4 @@ -78,9 +80,15 @@ #define HID_SYSINFO_BTN_MASK GENMASK(7, 0) #define HID_SYSINFO_MAX_BTN 8 +#define HID_CMD_SET_POWER 0x8 + +#define HID_POWER_ON 0x0 +#define HID_POWER_SLEEP 0x1 + #define CY_HID_OUTPUT_TIMEOUT_MS 200 #define CY_HID_OUTPUT_GET_SYSINFO_TIMEOUT_MS 3000 #define CY_HID_GET_HID_DESCRIPTOR_TIMEOUT_MS 4000 +#define CY_HID_SET_POWER_TIMEOUT 500 /* maximum number of concurrent tracks */ #define TOUCH_REPORT_SIZE 10 @@ -100,6 +108,14 @@ #define TOUCH_REPORT_USAGE_PG_MIN 0xFF010063 #define TOUCH_COL_USAGE_PG 0x000D0022 +#define SET_CMD_LOW(byte, bits) \ + ((byte) = (((byte) & 0xF0) | ((bits) & 0x0F))) +#define SET_CMD_HIGH(byte, bits)\ + ((byte) = (((byte) & 0x0F) | ((bits) & 0xF0))) +#define SET_CMD_OPCODE(byte, opcode) SET_CMD_LOW(byte, opcode) +#define SET_CMD_REPORT_TYPE(byte, type) SET_CMD_HIGH(byte, ((type) << 4)) +#define SET_CMD_REPORT_ID(byte, id) SET_CMD_LOW(byte, id) + /* System Information interface definitions */ struct cyttsp5_sensing_conf_data_dev { u8 electrodes_x; @@ -557,10 +573,44 @@ static int cyttsp5_hid_output_get_sysinfo(struct cyttsp5 *ts) return cyttsp5_get_sysinfo_regs(ts); } +static int cyttsp5_power_control(struct cyttsp5 *ts, bool on) +{ + u8 state = on ? HID_POWER_ON : HID_POWER_SLEEP; + u8 cmd[2] = { 0 }; + int rc; + + SET_CMD_REPORT_TYPE(cmd[0], 0); + SET_CMD_REPORT_ID(cmd[0], HID_POWER_SLEEP); + SET_CMD_OPCODE(cmd[1], HID_CMD_SET_POWER); + + rc = cyttsp5_write(ts, HID_COMMAND_REG, cmd, sizeof(cmd)); + if (rc) { + dev_err(ts->dev, "Failed to write power command %d", rc); + return rc; + } + + rc = wait_for_completion_interruptible_timeout(&ts->cmd_done, + msecs_to_jiffies(CY_HID_SET_POWER_TIMEOUT)); + if (rc <= 0) { + dev_err(ts->dev, "HID power cmd execution timed out\n"); + return -ETIMEDOUT; + } + + if (ts->response_buf[2] != HID_RESPONSE_REPORT_ID || + (ts->response_buf[3] & 0x03) != state || + (ts->response_buf[4] & 0x0f) != HID_CMD_SET_POWER) { + dev_err(ts->dev, "Validation of the %s response failed\n", + on ? "wakeup" : "sleep"); + return -EINVAL; + } + + return 0; +} + static int cyttsp5_hid_output_bl_launch_app(struct cyttsp5 *ts) { int rc; - u8 cmd[HID_OUTPUT_BL_LAUNCH_APP]; + u8 cmd[HID_OUTPUT_BL_LAUNCH_APP_SIZE]; u16 crc; put_unaligned_le16(HID_OUTPUT_BL_LAUNCH_APP_SIZE, cmd); @@ -601,12 +651,7 @@ static int cyttsp5_get_hid_descriptor(struct cyttsp5 *ts, struct cyttsp5_hid_desc *desc) { struct device *dev = ts->dev; - __le16 hid_desc_register = cpu_to_le16(HID_DESC_REG); int rc; - u8 cmd[2]; - - /* Set HID descriptor register */ - memcpy(cmd, &hid_desc_register, sizeof(hid_desc_register)); rc = cyttsp5_write(ts, HID_DESC_REG, NULL, 0); if (rc) { @@ -675,6 +720,10 @@ static irqreturn_t cyttsp5_handle_irq(int irq, void *handle) case HID_BTN_REPORT_ID: cyttsp5_btn_attention(ts->dev); break; + case HID_RESPONSE_REPORT_ID: + memcpy(ts->response_buf, ts->input_buf, size); + complete(&ts->cmd_done); + break; default: /* It is not an input but a command response */ memcpy(ts->response_buf, ts->input_buf, size); @@ -886,12 +935,35 @@ static const struct i2c_device_id cyttsp5_i2c_id[] = { }; MODULE_DEVICE_TABLE(i2c, cyttsp5_i2c_id); +static int __maybe_unused cyttsp5_suspend(struct device *dev) +{ + struct cyttsp5 *ts = dev_get_drvdata(dev); + + if (!device_may_wakeup(dev)) + cyttsp5_power_control(ts, false); + + return 0; +} + +static int __maybe_unused cyttsp5_resume(struct device *dev) +{ + struct cyttsp5 *ts = dev_get_drvdata(dev); + + if (!device_may_wakeup(dev)) + cyttsp5_power_control(ts, true); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(cyttsp5_pm, cyttsp5_suspend, cyttsp5_resume); + static struct i2c_driver cyttsp5_i2c_driver = { .driver = { .name = CYTTSP5_NAME, .of_match_table = cyttsp5_of_match, + .pm = &cyttsp5_pm, }, - .probe_new = cyttsp5_i2c_probe, + .probe = cyttsp5_i2c_probe, .id_table = cyttsp5_i2c_id, }; module_i2c_driver(cyttsp5_i2c_driver); |