diff options
author | Andrew Duggan <aduggan@synaptics.com> | 2016-11-09 03:47:58 +0300 |
---|---|---|
committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-11-09 04:12:08 +0300 |
commit | 24f63b1cb05034de74289a684e0938388757085d (patch) | |
tree | f333957e0d5b601be06a3b8bd76d6c9d4dd644b7 /drivers/input/rmi4 | |
parent | 2775e523246e11c5ce90b69226c5e67aa43e64a5 (diff) | |
download | linux-24f63b1cb05034de74289a684e0938388757085d.tar.xz |
Input: synaptics-rmi4 - add support for controlling dribble packets in F12
Implements reading and setting the dribble bit in F12's control registers.
Signed-off-by: Andrew Duggan <aduggan@synaptics.com>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/rmi4')
-rw-r--r-- | drivers/input/rmi4/rmi_f12.c | 70 |
1 files changed, 69 insertions, 1 deletions
diff --git a/drivers/input/rmi4/rmi_f12.c b/drivers/input/rmi4/rmi_f12.c index 767ac7920c75..d7255f18306d 100644 --- a/drivers/input/rmi4/rmi_f12.c +++ b/drivers/input/rmi4/rmi_f12.c @@ -31,6 +31,7 @@ enum rmi_f12_object_type { struct f12_data { struct rmi_2d_sensor sensor; struct rmi_2d_sensor_platform_data sensor_pdata; + bool has_dribble; u16 data_addr; @@ -239,12 +240,76 @@ static int rmi_f12_attention(struct rmi_function *fn, return 0; } +static int rmi_f12_write_control_regs(struct rmi_function *fn) +{ + int ret; + const struct rmi_register_desc_item *item; + struct rmi_device *rmi_dev = fn->rmi_dev; + struct f12_data *f12 = dev_get_drvdata(&fn->dev); + int control_size; + char buf[3]; + u16 control_offset = 0; + u8 subpacket_offset = 0; + + if (f12->has_dribble + && (f12->sensor.dribble != RMI_REG_STATE_DEFAULT)) { + item = rmi_get_register_desc_item(&f12->control_reg_desc, 20); + if (item) { + control_offset = rmi_register_desc_calc_reg_offset( + &f12->control_reg_desc, 20); + + /* + * The byte containing the EnableDribble bit will be + * in either byte 0 or byte 2 of control 20. Depending + * on the existence of subpacket 0. If control 20 is + * larger then 3 bytes, just read the first 3. + */ + control_size = min(item->reg_size, 3UL); + + ret = rmi_read_block(rmi_dev, fn->fd.control_base_addr + + control_offset, buf, control_size); + if (ret) + return ret; + + if (rmi_register_desc_has_subpacket(item, 0)) + subpacket_offset += 1; + + switch (f12->sensor.dribble) { + case RMI_REG_STATE_OFF: + buf[subpacket_offset] &= ~BIT(2); + break; + case RMI_REG_STATE_ON: + buf[subpacket_offset] |= BIT(2); + break; + case RMI_REG_STATE_DEFAULT: + default: + break; + } + + ret = rmi_write_block(rmi_dev, + fn->fd.control_base_addr + control_offset, + buf, control_size); + if (ret) + return ret; + } + } + + return 0; + +} + static int rmi_f12_config(struct rmi_function *fn) { struct rmi_driver *drv = fn->rmi_dev->driver; + int ret; drv->set_irq_bits(fn->rmi_dev, fn->irq_mask); + ret = rmi_f12_write_control_regs(fn); + if (ret) + dev_warn(&fn->dev, + "Failed to write F12 control registers: %d\n", ret); + return 0; } @@ -271,7 +336,7 @@ static int rmi_f12_probe(struct rmi_function *fn) } ++query_addr; - if (!(buf & 0x1)) { + if (!(buf & BIT(0))) { dev_err(&fn->dev, "Behavior of F12 without register descriptors is undefined.\n"); return -ENODEV; @@ -281,6 +346,8 @@ static int rmi_f12_probe(struct rmi_function *fn) if (!f12) return -ENOMEM; + f12->has_dribble = !!(buf & BIT(3)); + if (fn->dev.of_node) { ret = rmi_2d_sensor_of_probe(&fn->dev, &f12->sensor_pdata); if (ret) @@ -329,6 +396,7 @@ static int rmi_f12_probe(struct rmi_function *fn) sensor->x_mm = f12->sensor_pdata.x_mm; sensor->y_mm = f12->sensor_pdata.y_mm; + sensor->dribble = f12->sensor_pdata.dribble; if (sensor->sensor_type == rmi_sensor_default) sensor->sensor_type = |