Add support to the reMarkable2 (rM2) for the Wacom I2C device.
This is based on the reMarkable Linux fork and with this series I am
able to probe the Wacom digitiser.
Alistair Francis (6):
devicetree/bindings: Initial commit of wacom,wacom-i2c
input/touchscreen: Add device tree support to wacom_i2c
touchscreen/wacom_i2c: Add support for distance and tilt x/y
touchscreen/wacom_i2c: Clean up the query device fields
touchscreen/wacom_i2c: Add support for vdd regulator
arch/arm: reMarkable2: Enable wacom_i2c
.../input/touchscreen/wacom,wacom-i2c.yaml | 48 +++++++
.../devicetree/bindings/vendor-prefixes.yaml | 2 +
arch/arm/boot/dts/imx7d-remarkable2.dts | 41 ++++++
arch/arm/configs/imx_v6_v7_defconfig | 1 +
drivers/input/touchscreen/wacom_i2c.c | 136 +++++++++++++++---
5 files changed, 205 insertions(+), 23 deletions(-)
create mode 100644 Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml
--
2.29.2
Signed-off-by: Alistair Francis <[email protected]>
---
.../input/touchscreen/wacom,wacom-i2c.yaml | 44 +++++++++++++++++++
.../devicetree/bindings/vendor-prefixes.yaml | 2 +
2 files changed, 46 insertions(+)
create mode 100644 Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml
diff --git a/Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml b/Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml
new file mode 100644
index 000000000000..b36d22cd20a2
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/wacom,wacom-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Wacom I2C Controller
+
+maintainers:
+ - Alistair Francis <[email protected]>
+
+allOf:
+ - $ref: touchscreen.yaml#
+
+properties:
+ compatible:
+ const: wacom,wacom-i2c
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - interrupts
+
+additionalProperties: false
+
+examples:
+ - |
+ #include "dt-bindings/interrupt-controller/irq.h"
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ digitiser@9 {
+ compatible = "wacom,wacom-i2c";
+ reg = <0x9>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <9 IRQ_TYPE_LEVEL_LOW>;
+ };
+ };
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index 041ae90b0d8f..5bca22f035a3 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1202,6 +1202,8 @@ patternProperties:
description: Vision Optical Technology Co., Ltd.
"^vxt,.*":
description: VXT Ltd
+ "^wacom,.*":
+ description: Wacom Co., Ltd
"^wand,.*":
description: Wandbord (Technexion)
"^waveshare,.*":
--
2.29.2
This is based on the out of tree rM2 driver.
Signed-off-by: Alistair Francis <[email protected]>
---
drivers/input/touchscreen/wacom_i2c.c | 25 +++++++++++++++++++++++--
1 file changed, 23 insertions(+), 2 deletions(-)
diff --git a/drivers/input/touchscreen/wacom_i2c.c b/drivers/input/touchscreen/wacom_i2c.c
index ec6e0aff8deb..5f0b80d52ad5 100644
--- a/drivers/input/touchscreen/wacom_i2c.c
+++ b/drivers/input/touchscreen/wacom_i2c.c
@@ -22,12 +22,16 @@
#define WACOM_CMD_QUERY3 0x02
#define WACOM_CMD_THROW0 0x05
#define WACOM_CMD_THROW1 0x00
-#define WACOM_QUERY_SIZE 19
+#define WACOM_QUERY_SIZE 22
struct wacom_features {
int x_max;
int y_max;
int pressure_max;
+ int distance_max;
+ int distance_physical_max;
+ int tilt_x_max;
+ int tilt_y_max;
char fw_version;
};
@@ -79,6 +83,10 @@ static int wacom_query_device(struct i2c_client *client,
features->y_max = get_unaligned_le16(&data[5]);
features->pressure_max = get_unaligned_le16(&data[11]);
features->fw_version = get_unaligned_le16(&data[13]);
+ features->distance_max = data[15];
+ features->distance_physical_max = data[16];
+ features->tilt_x_max = get_unaligned_le16(&data[17]);
+ features->tilt_y_max = get_unaligned_le16(&data[19]);
dev_dbg(&client->dev,
"x_max:%d, y_max:%d, pressure:%d, fw:%d\n",
@@ -95,6 +103,7 @@ static irqreturn_t wacom_i2c_irq(int irq, void *dev_id)
u8 *data = wac_i2c->data;
unsigned int x, y, pressure;
unsigned char tsw, f1, f2, ers;
+ short tilt_x, tilt_y, distance;
int error;
error = i2c_master_recv(wac_i2c->client,
@@ -109,6 +118,11 @@ static irqreturn_t wacom_i2c_irq(int irq, void *dev_id)
x = le16_to_cpup((__le16 *)&data[4]);
y = le16_to_cpup((__le16 *)&data[6]);
pressure = le16_to_cpup((__le16 *)&data[8]);
+ distance = data[10];
+
+ /* Signed */
+ tilt_x = le16_to_cpup((__le16 *)&data[11]);
+ tilt_y = le16_to_cpup((__le16 *)&data[13]);
if (!wac_i2c->prox)
wac_i2c->tool = (data[3] & 0x0c) ?
@@ -123,6 +137,9 @@ static irqreturn_t wacom_i2c_irq(int irq, void *dev_id)
input_report_abs(input, ABS_X, x);
input_report_abs(input, ABS_Y, y);
input_report_abs(input, ABS_PRESSURE, pressure);
+ input_report_abs(input, ABS_DISTANCE, distance);
+ input_report_abs(input, ABS_TILT_X, tilt_x);
+ input_report_abs(input, ABS_TILT_Y, tilt_y);
input_sync(input);
out:
@@ -195,7 +212,11 @@ static int wacom_i2c_probe(struct i2c_client *client,
input_set_abs_params(input, ABS_Y, 0, features.y_max, 0, 0);
input_set_abs_params(input, ABS_PRESSURE,
0, features.pressure_max, 0, 0);
-
+ input_set_abs_params(input, ABS_DISTANCE, 0, features.distance_max, 0, 0);
+ input_set_abs_params(input, ABS_TILT_X, -features.tilt_x_max,
+ features.tilt_x_max, 0, 0);
+ input_set_abs_params(input, ABS_TILT_Y, -features.tilt_y_max,
+ features.tilt_y_max, 0, 0);
input_set_drvdata(input, wac_i2c);
error = request_threaded_irq(client->irq, NULL, wacom_i2c_irq,
--
2.29.2
Improve the query device fields to be more verbose.
Signed-off-by: Alistair Francis <[email protected]>
---
drivers/input/touchscreen/wacom_i2c.c | 73 +++++++++++++++++++--------
1 file changed, 52 insertions(+), 21 deletions(-)
diff --git a/drivers/input/touchscreen/wacom_i2c.c b/drivers/input/touchscreen/wacom_i2c.c
index 5f0b80d52ad5..a22570adc939 100644
--- a/drivers/input/touchscreen/wacom_i2c.c
+++ b/drivers/input/touchscreen/wacom_i2c.c
@@ -13,15 +13,32 @@
#include <linux/irq.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
+#include <linux/reset.h>
#include <linux/of.h>
#include <asm/unaligned.h>
-#define WACOM_CMD_QUERY0 0x04
-#define WACOM_CMD_QUERY1 0x00
-#define WACOM_CMD_QUERY2 0x33
-#define WACOM_CMD_QUERY3 0x02
-#define WACOM_CMD_THROW0 0x05
-#define WACOM_CMD_THROW1 0x00
+// Registers
+#define WACOM_COMMAND_LSB 0x04
+#define WACOM_COMMAND_MSB 0x00
+
+#define WACOM_DATA_LSB 0x05
+#define WACOM_DATA_MSB 0x00
+
+// Report types
+#define REPORT_FEATURE 0x30
+
+// Requests / operations
+#define OPCODE_GET_REPORT 0x02
+
+// Power settings
+#define POWER_ON 0x00
+#define POWER_SLEEP 0x01
+
+// Input report ids
+#define WACOM_PEN_DATA_REPORT 2
+#define WACOM_SHINONOME_REPORT 26
+
+#define WACOM_QUERY_REPORT 3
#define WACOM_QUERY_SIZE 22
struct wacom_features {
@@ -45,34 +62,44 @@ struct wacom_i2c {
};
static int wacom_query_device(struct i2c_client *client,
- struct wacom_features *features)
+ struct wacom_features *features)
{
int ret;
- u8 cmd1[] = { WACOM_CMD_QUERY0, WACOM_CMD_QUERY1,
- WACOM_CMD_QUERY2, WACOM_CMD_QUERY3 };
- u8 cmd2[] = { WACOM_CMD_THROW0, WACOM_CMD_THROW1 };
u8 data[WACOM_QUERY_SIZE];
+ struct reset_control *rstc;
+
+ u8 get_query_data_cmd[] = {
+ WACOM_COMMAND_LSB,
+ WACOM_COMMAND_MSB,
+ REPORT_FEATURE | WACOM_QUERY_REPORT,
+ OPCODE_GET_REPORT,
+ WACOM_DATA_LSB,
+ WACOM_DATA_MSB,
+ };
+
struct i2c_msg msgs[] = {
+ // Request reading of feature ReportID: 3 (Pen Query Data)
{
.addr = client->addr,
.flags = 0,
- .len = sizeof(cmd1),
- .buf = cmd1,
- },
- {
- .addr = client->addr,
- .flags = 0,
- .len = sizeof(cmd2),
- .buf = cmd2,
+ .len = sizeof(get_query_data_cmd),
+ .buf = get_query_data_cmd,
},
+ // Read 21 bytes
{
.addr = client->addr,
.flags = I2C_M_RD,
- .len = sizeof(data),
+ .len = WACOM_QUERY_SIZE - 1,
.buf = data,
},
};
+ rstc = devm_reset_control_get_optional_exclusive(&client->dev, NULL);
+ if (IS_ERR(rstc))
+ dev_err(&client->dev, "Failed to get reset control before init\n");
+ else
+ reset_control_reset(rstc);
+
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret < 0)
return ret;
@@ -89,9 +116,13 @@ static int wacom_query_device(struct i2c_client *client,
features->tilt_y_max = get_unaligned_le16(&data[19]);
dev_dbg(&client->dev,
- "x_max:%d, y_max:%d, pressure:%d, fw:%d\n",
+ "x_max:%d, y_max:%d, pressure:%d, fw:%d, "
+ "distance: %d, phys distance: %d, "
+ "tilt_x_max: %d, tilt_y_max: %d\n",
features->x_max, features->y_max,
- features->pressure_max, features->fw_version);
+ features->pressure_max, features->fw_version,
+ features->distance_max, features->distance_physical_max,
+ features->tilt_x_max, features->tilt_y_max);
return 0;
}
--
2.29.2
Hi,
thnaks for the patch.
On 21-01-20 22:56, Alistair Francis wrote:
> Signed-off-by: Alistair Francis <[email protected]>
> ---
> .../input/touchscreen/wacom,wacom-i2c.yaml | 44 +++++++++++++++++++
> .../devicetree/bindings/vendor-prefixes.yaml | 2 +
This should be splitted into two patches.
Regards,
Marco
> 2 files changed, 46 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml
>
> diff --git a/Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml b/Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml
> new file mode 100644
> index 000000000000..b36d22cd20a2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml
> @@ -0,0 +1,44 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/input/touchscreen/wacom,wacom-i2c.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Wacom I2C Controller
> +
> +maintainers:
> + - Alistair Francis <[email protected]>
> +
> +allOf:
> + - $ref: touchscreen.yaml#
> +
> +properties:
> + compatible:
> + const: wacom,wacom-i2c
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include "dt-bindings/interrupt-controller/irq.h"
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + digitiser@9 {
> + compatible = "wacom,wacom-i2c";
> + reg = <0x9>;
> + interrupt-parent = <&gpio1>;
> + interrupts = <9 IRQ_TYPE_LEVEL_LOW>;
> + };
> + };
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> index 041ae90b0d8f..5bca22f035a3 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
> +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> @@ -1202,6 +1202,8 @@ patternProperties:
> description: Vision Optical Technology Co., Ltd.
> "^vxt,.*":
> description: VXT Ltd
> + "^wacom,.*":
> + description: Wacom Co., Ltd
> "^wand,.*":
> description: Wandbord (Technexion)
> "^waveshare,.*":
> --
> 2.29.2
>
>
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
Hi,
thanks for the patch. Please align all your patch-subjects belonging to
the driver to: "Input: wacom_i2c - ..."
On 21-01-20 22:56, Alistair Francis wrote:
> This is based on the out of tree rM2 driver.
>
> Signed-off-by: Alistair Francis <[email protected]>
> ---
> drivers/input/touchscreen/wacom_i2c.c | 25 +++++++++++++++++++++++--
> 1 file changed, 23 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/input/touchscreen/wacom_i2c.c b/drivers/input/touchscreen/wacom_i2c.c
> index ec6e0aff8deb..5f0b80d52ad5 100644
> --- a/drivers/input/touchscreen/wacom_i2c.c
> +++ b/drivers/input/touchscreen/wacom_i2c.c
> @@ -22,12 +22,16 @@
> #define WACOM_CMD_QUERY3 0x02
> #define WACOM_CMD_THROW0 0x05
> #define WACOM_CMD_THROW1 0x00
> -#define WACOM_QUERY_SIZE 19
> +#define WACOM_QUERY_SIZE 22
>
> struct wacom_features {
> int x_max;
> int y_max;
> int pressure_max;
> + int distance_max;
> + int distance_physical_max;
> + int tilt_x_max;
> + int tilt_y_max;
> char fw_version;
> };
>
> @@ -79,6 +83,10 @@ static int wacom_query_device(struct i2c_client *client,
> features->y_max = get_unaligned_le16(&data[5]);
> features->pressure_max = get_unaligned_le16(&data[11]);
> features->fw_version = get_unaligned_le16(&data[13]);
> + features->distance_max = data[15];
> + features->distance_physical_max = data[16];
> + features->tilt_x_max = get_unaligned_le16(&data[17]);
> + features->tilt_y_max = get_unaligned_le16(&data[19]);
>
> dev_dbg(&client->dev,
> "x_max:%d, y_max:%d, pressure:%d, fw:%d\n",
> @@ -95,6 +103,7 @@ static irqreturn_t wacom_i2c_irq(int irq, void *dev_id)
> u8 *data = wac_i2c->data;
> unsigned int x, y, pressure;
> unsigned char tsw, f1, f2, ers;
> + short tilt_x, tilt_y, distance;
> int error;
>
> error = i2c_master_recv(wac_i2c->client,
> @@ -109,6 +118,11 @@ static irqreturn_t wacom_i2c_irq(int irq, void *dev_id)
> x = le16_to_cpup((__le16 *)&data[4]);
> y = le16_to_cpup((__le16 *)&data[6]);
> pressure = le16_to_cpup((__le16 *)&data[8]);
> + distance = data[10];
> +
> + /* Signed */
> + tilt_x = le16_to_cpup((__le16 *)&data[11]);
> + tilt_y = le16_to_cpup((__le16 *)&data[13]);
>
> if (!wac_i2c->prox)
> wac_i2c->tool = (data[3] & 0x0c) ?
> @@ -123,6 +137,9 @@ static irqreturn_t wacom_i2c_irq(int irq, void *dev_id)
> input_report_abs(input, ABS_X, x);
> input_report_abs(input, ABS_Y, y);
> input_report_abs(input, ABS_PRESSURE, pressure);
> + input_report_abs(input, ABS_DISTANCE, distance);
> + input_report_abs(input, ABS_TILT_X, tilt_x);
> + input_report_abs(input, ABS_TILT_Y, tilt_y);
> input_sync(input);
>
> out:
> @@ -195,7 +212,11 @@ static int wacom_i2c_probe(struct i2c_client *client,
> input_set_abs_params(input, ABS_Y, 0, features.y_max, 0, 0);
> input_set_abs_params(input, ABS_PRESSURE,
> 0, features.pressure_max, 0, 0);
> -
> + input_set_abs_params(input, ABS_DISTANCE, 0, features.distance_max, 0, 0);
> + input_set_abs_params(input, ABS_TILT_X, -features.tilt_x_max,
> + features.tilt_x_max, 0, 0);
> + input_set_abs_params(input, ABS_TILT_Y, -features.tilt_y_max,
> + features.tilt_y_max, 0, 0);
> input_set_drvdata(input, wac_i2c);
>
> error = request_threaded_irq(client->irq, NULL, wacom_i2c_irq,
> --
> 2.29.2
>
>
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
Hi Alistair,
thanks for the patches. Before getting into the series please check all
your commit subjects. Also please check that you do only one logical
change per patch: e.g. adding DT-Support means: Add the dt-table and not
more.
I looking forward to your v2 :)
Regards,
Marco
On 21-01-20 22:56, Alistair Francis wrote:
> Add support to the reMarkable2 (rM2) for the Wacom I2C device.
>
> This is based on the reMarkable Linux fork and with this series I am
> able to probe the Wacom digitiser.
>
> Alistair Francis (6):
> devicetree/bindings: Initial commit of wacom,wacom-i2c
> input/touchscreen: Add device tree support to wacom_i2c
> touchscreen/wacom_i2c: Add support for distance and tilt x/y
> touchscreen/wacom_i2c: Clean up the query device fields
> touchscreen/wacom_i2c: Add support for vdd regulator
> arch/arm: reMarkable2: Enable wacom_i2c
>
> .../input/touchscreen/wacom,wacom-i2c.yaml | 48 +++++++
> .../devicetree/bindings/vendor-prefixes.yaml | 2 +
> arch/arm/boot/dts/imx7d-remarkable2.dts | 41 ++++++
> arch/arm/configs/imx_v6_v7_defconfig | 1 +
> drivers/input/touchscreen/wacom_i2c.c | 136 +++++++++++++++---
> 5 files changed, 205 insertions(+), 23 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml
>
> --
> 2.29.2
>
>
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |