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Date: Tue, 23 Aug 2016 16:30:47 -0300
From: Mauro Carvalho Chehab <mchehab@....samsung.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Nick Dyer <nick@...anahar.org>, Hans Verkuil <hverkuil@...all.nl>,
linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-media@...r.kernel.org,
Benjamin Tissoires <benjamin.tissoires@...hat.com>,
Benson Leung <bleung@...omium.org>,
Javier Martinez Canillas <javier@....samsung.com>,
Chris Healy <cphealy@...il.com>,
Henrik Rydberg <rydberg@...math.org>,
Andrew Duggan <aduggan@...aptics.com>,
James Chen <james.chen@....com.tw>,
Dudley Du <dudl@...ress.com>,
Andrew de los Reyes <adlr@...omium.org>,
sheckylin@...omium.org, Peter Hutterer <peter.hutterer@...-t.net>,
Florian Echtler <floe@...terbrot.org>
Subject: Re: [PATCH v8 03/10] Input: atmel_mxt_ts - add support for T37
diagnostic data
Hi Dmitry,
Em Mon, 18 Jul 2016 22:10:31 +0100
Nick Dyer <nick@...anahar.org> escreveu:
> Atmel maXTouch devices have a T37 object which can be used to read raw
> touch deltas from the device. This consists of an array of 16-bit
> integers, one for each node on the touchscreen matrix.
Is it ok to merge this patch (and the other patches on this series)
via my tree?
Regards,
Mauro
>
> Signed-off-by: Nick Dyer <nick@...anahar.org>
> ---
> drivers/input/touchscreen/Kconfig | 6 ++
> drivers/input/touchscreen/atmel_mxt_ts.c | 159 ++++++++++++++++++++++++++++++
> 2 files changed, 165 insertions(+)
>
> diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
> index 8ecdc38..da96ecf 100644
> --- a/drivers/input/touchscreen/Kconfig
> +++ b/drivers/input/touchscreen/Kconfig
> @@ -115,6 +115,12 @@ config TOUCHSCREEN_ATMEL_MXT
> To compile this driver as a module, choose M here: the
> module will be called atmel_mxt_ts.
>
> +config TOUCHSCREEN_ATMEL_MXT_T37
> + bool "Support T37 Diagnostic Data"
> + depends on TOUCHSCREEN_ATMEL_MXT
> + help
> + Say Y here if you want support for the T37 Diagnostic Data object.
> +
> config TOUCHSCREEN_AUO_PIXCIR
> tristate "AUO in-cell touchscreen using Pixcir ICs"
> depends on I2C
> diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
> index 5af7907..0048233 100644
> --- a/drivers/input/touchscreen/atmel_mxt_ts.c
> +++ b/drivers/input/touchscreen/atmel_mxt_ts.c
> @@ -124,6 +124,19 @@ struct t9_range {
> #define MXT_COMMS_CTRL 0
> #define MXT_COMMS_CMD 1
>
> +/* MXT_DEBUG_DIAGNOSTIC_T37 */
> +#define MXT_DIAGNOSTIC_PAGEUP 0x01
> +#define MXT_DIAGNOSTIC_DELTAS 0x10
> +#define MXT_DIAGNOSTIC_SIZE 128
> +
> +struct t37_debug {
> +#ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
> + u8 mode;
> + u8 page;
> + u8 data[MXT_DIAGNOSTIC_SIZE];
> +#endif
> +};
> +
> /* Define for MXT_GEN_COMMAND_T6 */
> #define MXT_BOOT_VALUE 0xa5
> #define MXT_RESET_VALUE 0x01
> @@ -205,6 +218,14 @@ struct mxt_object {
> u8 num_report_ids;
> } __packed;
>
> +struct mxt_dbg {
> + u16 t37_address;
> + u16 diag_cmd_address;
> + struct t37_debug *t37_buf;
> + unsigned int t37_pages;
> + unsigned int t37_nodes;
> +};
> +
> /* Each client has this additional data */
> struct mxt_data {
> struct i2c_client *client;
> @@ -233,6 +254,7 @@ struct mxt_data {
> u8 num_touchids;
> u8 multitouch;
> struct t7_config t7_cfg;
> + struct mxt_dbg dbg;
>
> /* Cached parameters from object table */
> u16 T5_address;
> @@ -2043,6 +2065,141 @@ recheck:
> return 0;
> }
>
> +#ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
> +static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x,
> + unsigned int y)
> +{
> + struct mxt_dbg *dbg = &data->dbg;
> + unsigned int ofs, page;
> +
> + ofs = (y + (x * data->info.matrix_ysize)) * sizeof(u16);
> + page = ofs / MXT_DIAGNOSTIC_SIZE;
> + ofs %= MXT_DIAGNOSTIC_SIZE;
> +
> + return get_unaligned_le16(&dbg->t37_buf[page].data[ofs]);
> +}
> +
> +static int mxt_convert_debug_pages(struct mxt_data *data, u16 *outbuf)
> +{
> + struct mxt_dbg *dbg = &data->dbg;
> + unsigned int x = 0;
> + unsigned int y = 0;
> + unsigned int i;
> +
> + for (i = 0; i < dbg->t37_nodes; i++) {
> + outbuf[i] = mxt_get_debug_value(data, x, y);
> +
> + /* Next value */
> + if (++x >= data->info.matrix_xsize) {
> + x = 0;
> + y++;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int mxt_read_diagnostic_debug(struct mxt_data *data, u8 mode,
> + u16 *outbuf)
> +{
> + struct mxt_dbg *dbg = &data->dbg;
> + int retries = 0;
> + int page;
> + int ret;
> + u8 cmd = mode;
> + struct t37_debug *p;
> + u8 cmd_poll;
> +
> + for (page = 0; page < dbg->t37_pages; page++) {
> + p = dbg->t37_buf + page;
> +
> + ret = mxt_write_reg(data->client, dbg->diag_cmd_address,
> + cmd);
> + if (ret)
> + return ret;
> +
> + retries = 0;
> + msleep(20);
> +wait_cmd:
> + /* Read back command byte */
> + ret = __mxt_read_reg(data->client, dbg->diag_cmd_address,
> + sizeof(cmd_poll), &cmd_poll);
> + if (ret)
> + return ret;
> +
> + /* Field is cleared once the command has been processed */
> + if (cmd_poll) {
> + if (retries++ > 100)
> + return -EINVAL;
> +
> + msleep(20);
> + goto wait_cmd;
> + }
> +
> + /* Read T37 page */
> + ret = __mxt_read_reg(data->client, dbg->t37_address,
> + sizeof(struct t37_debug), p);
> + if (ret)
> + return ret;
> +
> + if (p->mode != mode || p->page != page) {
> + dev_err(&data->client->dev, "T37 page mismatch\n");
> + return -EINVAL;
> + }
> +
> + dev_dbg(&data->client->dev, "%s page:%d retries:%d\n",
> + __func__, page, retries);
> +
> + /* For remaining pages, write PAGEUP rather than mode */
> + cmd = MXT_DIAGNOSTIC_PAGEUP;
> + }
> +
> + return mxt_convert_debug_pages(data, outbuf);
> +}
> +
> +static void mxt_debug_init(struct mxt_data *data)
> +{
> + struct mxt_dbg *dbg = &data->dbg;
> + struct mxt_object *object;
> +
> + object = mxt_get_object(data, MXT_GEN_COMMAND_T6);
> + if (!object)
> + goto error;
> +
> + dbg->diag_cmd_address = object->start_address + MXT_COMMAND_DIAGNOSTIC;
> +
> + object = mxt_get_object(data, MXT_DEBUG_DIAGNOSTIC_T37);
> + if (!object)
> + goto error;
> +
> + if (mxt_obj_size(object) != sizeof(struct t37_debug)) {
> + dev_warn(&data->client->dev, "Bad T37 size");
> + goto error;
> + }
> +
> + dbg->t37_address = object->start_address;
> +
> + /* Calculate size of data and allocate buffer */
> + dbg->t37_nodes = data->info.matrix_xsize * data->info.matrix_ysize;
> + dbg->t37_pages = DIV_ROUND_UP(dbg->t37_nodes * sizeof(u16),
> + sizeof(dbg->t37_buf->data));
> +
> + dbg->t37_buf = devm_kmalloc_array(&data->client->dev, dbg->t37_pages,
> + sizeof(struct t37_debug), GFP_KERNEL);
> + if (!dbg->t37_buf)
> + goto error;
> +
> + return;
> +
> +error:
> + dev_warn(&data->client->dev, "Error initializing T37\n");
> +}
> +#else
> +static void mxt_debug_init(struct mxt_data *data)
> +{
> +}
> +#endif
> +
> static int mxt_configure_objects(struct mxt_data *data,
> const struct firmware *cfg)
> {
> @@ -2070,6 +2227,8 @@ static int mxt_configure_objects(struct mxt_data *data,
> dev_warn(dev, "No touch object detected\n");
> }
>
> + mxt_debug_init(data);
> +
> dev_info(dev,
> "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
> info->family_id, info->variant_id, info->version >> 4,
--
Thanks,
Mauro
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