diff options
Diffstat (limited to 'drivers/rtc/rtc-hid-sensor-time.c')
| -rw-r--r-- | drivers/rtc/rtc-hid-sensor-time.c | 96 |
1 files changed, 74 insertions, 22 deletions
diff --git a/drivers/rtc/rtc-hid-sensor-time.c b/drivers/rtc/rtc-hid-sensor-time.c index 63024505ddd..965a9da7086 100644 --- a/drivers/rtc/rtc-hid-sensor-time.c +++ b/drivers/rtc/rtc-hid-sensor-time.c @@ -23,10 +23,6 @@ #include <linux/iio/iio.h> #include <linux/rtc.h> -/* Format: HID-SENSOR-usage_id_in_hex */ -/* Usage ID from spec for Time: 0x2000A0 */ -#define DRIVER_NAME "HID-SENSOR-2000a0" /* must be lowercase */ - enum hid_time_channel { CHANNEL_SCAN_INDEX_YEAR, CHANNEL_SCAN_INDEX_MONTH, @@ -76,6 +72,20 @@ static int hid_time_proc_event(struct hid_sensor_hub_device *hsdev, return 0; } +static u32 hid_time_value(size_t raw_len, char *raw_data) +{ + switch (raw_len) { + case 1: + return *(u8 *)raw_data; + case 2: + return *(u16 *)raw_data; + case 4: + return *(u32 *)raw_data; + default: + return (u32)(~0U); /* 0xff... or -1 to denote an error */ + } +} + static int hid_time_capture_sample(struct hid_sensor_hub_device *hsdev, unsigned usage_id, size_t raw_len, char *raw_data, void *priv) @@ -85,26 +95,35 @@ static int hid_time_capture_sample(struct hid_sensor_hub_device *hsdev, switch (usage_id) { case HID_USAGE_SENSOR_TIME_YEAR: - time_buf->tm_year = *(u8 *)raw_data; - if (time_buf->tm_year < 70) - /* assume we are in 1970...2069 */ - time_buf->tm_year += 100; + /* + * The draft for HID-sensors (HUTRR39) currently doesn't define + * the range for the year attribute. Therefor we support + * 8 bit (0-99) and 16 or 32 bits (full) as size for the year. + */ + if (raw_len == 1) { + time_buf->tm_year = *(u8 *)raw_data; + if (time_buf->tm_year < 70) + /* assume we are in 1970...2069 */ + time_buf->tm_year += 100; + } else + time_buf->tm_year = + (int)hid_time_value(raw_len, raw_data)-1900; break; case HID_USAGE_SENSOR_TIME_MONTH: - /* sensor sending the month as 1-12, we need 0-11 */ - time_buf->tm_mon = *(u8 *)raw_data-1; + /* sensors are sending the month as 1-12, we need 0-11 */ + time_buf->tm_mon = (int)hid_time_value(raw_len, raw_data)-1; break; case HID_USAGE_SENSOR_TIME_DAY: - time_buf->tm_mday = *(u8 *)raw_data; + time_buf->tm_mday = (int)hid_time_value(raw_len, raw_data); break; case HID_USAGE_SENSOR_TIME_HOUR: - time_buf->tm_hour = *(u8 *)raw_data; + time_buf->tm_hour = (int)hid_time_value(raw_len, raw_data); break; case HID_USAGE_SENSOR_TIME_MINUTE: - time_buf->tm_min = *(u8 *)raw_data; + time_buf->tm_min = (int)hid_time_value(raw_len, raw_data); break; case HID_USAGE_SENSOR_TIME_SECOND: - time_buf->tm_sec = *(u8 *)raw_data; + time_buf->tm_sec = (int)hid_time_value(raw_len, raw_data); break; default: return -EINVAL; @@ -150,9 +169,10 @@ static int hid_time_parse_report(struct platform_device *pdev, "not all needed attributes inside the same report!\n"); return -EINVAL; } - if (time_state->info[i].size != 1) { + if (time_state->info[i].size == 3 || + time_state->info[i].size > 4) { dev_err(&pdev->dev, - "attribute '%s' not 8 bits wide!\n", + "attribute '%s' not 8, 16 or 32 bits wide!\n", hid_time_attrib_name( time_state->info[i].attrib_id)); return -EINVAL; @@ -189,7 +209,7 @@ static int hid_rtc_read_time(struct device *dev, struct rtc_time *tm) platform_get_drvdata(to_platform_device(dev)); int ret; - INIT_COMPLETION(time_state->comp_last_time); + reinit_completion(&time_state->comp_last_time); /* get a report with all values through requesting one value */ sensor_hub_input_attr_get_raw_value(time_state->common_attributes.hsdev, HID_USAGE_SENSOR_TIME, hid_time_addresses[0], @@ -216,7 +236,7 @@ static const struct rtc_class_ops hid_time_rtc_ops = { static int hid_time_probe(struct platform_device *pdev) { int ret = 0; - struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev); struct hid_time_state *time_state = devm_kzalloc(&pdev->dev, sizeof(struct hid_time_state), GFP_KERNEL); @@ -255,30 +275,62 @@ static int hid_time_probe(struct platform_device *pdev) return ret; } + ret = sensor_hub_device_open(hsdev); + if (ret) { + dev_err(&pdev->dev, "failed to open sensor hub device!\n"); + goto err_open; + } + + /* + * Enable HID input processing early in order to be able to read the + * clock already in devm_rtc_device_register(). + */ + hid_device_io_start(hsdev->hdev); + time_state->rtc = devm_rtc_device_register(&pdev->dev, "hid-sensor-time", &hid_time_rtc_ops, THIS_MODULE); - if (IS_ERR(time_state->rtc)) { + if (IS_ERR_OR_NULL(time_state->rtc)) { + hid_device_io_stop(hsdev->hdev); + ret = time_state->rtc ? PTR_ERR(time_state->rtc) : -ENODEV; + time_state->rtc = NULL; dev_err(&pdev->dev, "rtc device register failed!\n"); - return PTR_ERR(time_state->rtc); + goto err_rtc; } return ret; + +err_rtc: + sensor_hub_device_close(hsdev); +err_open: + sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TIME); + return ret; } static int hid_time_remove(struct platform_device *pdev) { - struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev); + sensor_hub_device_close(hsdev); sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TIME); return 0; } +static struct platform_device_id hid_time_ids[] = { + { + /* Format: HID-SENSOR-usage_id_in_hex_lowercase */ + .name = "HID-SENSOR-2000a0", + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, hid_time_ids); + static struct platform_driver hid_time_platform_driver = { + .id_table = hid_time_ids, .driver = { - .name = DRIVER_NAME, + .name = KBUILD_MODNAME, .owner = THIS_MODULE, }, .probe = hid_time_probe, |