diff options
| -rw-r--r-- | drivers/hid/hid-rmi.c | 57 |
1 files changed, 52 insertions, 5 deletions
diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c index 9a792e7..2c14812 100644 --- a/drivers/hid/hid-rmi.c +++ b/drivers/hid/hid-rmi.c @@ -141,6 +141,8 @@ struct rmi_data { unsigned long firmware_id; u8 f01_ctrl0; + u8 interrupt_enable_mask; + bool restore_interrupt_mask; }; #define RMI_PAGE(addr) (((addr) >> 8) & 0xff) @@ -361,13 +363,34 @@ static void rmi_f11_process_touch(struct rmi_data *hdata, int slot, } } +static int rmi_reset_attn_mode(struct hid_device *hdev) +{ + struct rmi_data *data = hid_get_drvdata(hdev); + int ret; + + ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); + if (ret) + return ret; + + if (data->restore_interrupt_mask) { + ret = rmi_write(hdev, data->f01.control_base_addr + 1, + &data->interrupt_enable_mask); + if (ret) { + hid_err(hdev, "can not write F01 control register\n"); + return ret; + } + } + + return 0; +} + static void rmi_reset_work(struct work_struct *work) { struct rmi_data *hdata = container_of(work, struct rmi_data, reset_work); /* switch the device to RMI if we receive a generic mouse report */ - rmi_set_mode(hdata->hdev, RMI_MODE_ATTN_REPORTS); + rmi_reset_attn_mode(hdata->hdev); } static inline int rmi_schedule_reset(struct hid_device *hdev) @@ -590,7 +613,7 @@ static int rmi_post_reset(struct hid_device *hdev) struct rmi_data *data = hid_get_drvdata(hdev); int ret; - ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); + ret = rmi_reset_attn_mode(hdev); if (ret) { hid_err(hdev, "can not set rmi mode\n"); return ret; @@ -617,7 +640,7 @@ static int rmi_post_reset(struct hid_device *hdev) static int rmi_post_resume(struct hid_device *hdev) { - return rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); + return rmi_reset_attn_mode(hdev); } #endif /* CONFIG_PM */ @@ -673,6 +696,7 @@ static void rmi_register_function(struct rmi_data *data, f->interrupt_count = pdt_entry->interrupt_source_count; f->irq_mask = rmi_gen_mask(f->interrupt_base, f->interrupt_count); + data->interrupt_enable_mask |= f->irq_mask; } } @@ -810,12 +834,35 @@ static int rmi_populate_f01(struct hid_device *hdev) data->firmware_id += info[2] * 65536; } - ret = rmi_read(hdev, data->f01.control_base_addr, &data->f01_ctrl0); + ret = rmi_read_block(hdev, data->f01.control_base_addr, info, + 2); if (ret) { - hid_err(hdev, "can not read f01 ctrl0\n"); + hid_err(hdev, "can not read f01 ctrl registers\n"); return ret; } + + data->f01_ctrl0 = info[0]; + + if (!info[1]) { + /* + * Do to a firmware bug in some touchpads the F01 interrupt + * enable control register will be cleared on reset. + * This will stop the touchpad from reporting data, so + * if F01 CTRL1 is 0 then we need to explicitly enable + * interrupts for the functions we want data for. + */ + data->restore_interrupt_mask = true; + + ret = rmi_write(hdev, data->f01.control_base_addr + 1, + &data->interrupt_enable_mask); + if (ret) { + hid_err(hdev, "can not write to control reg 1: %d.\n", + ret); + return ret; + } + } + return 0; } |
