Re: [PATCHv5 5/5] Input: edt-ft5x06: Add support for M09 firmware version
From: Daniel Wagener
Date: Thu Mar 20 2014 - 10:54:46 EST
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Hash: SHA1
Am 20.03.2014 14:44, schrieb Lothar WaÃmann:
> From: Daniel Wagener <daniel.wagener@xxxxxxxxxxxxxxxxx>
>
> There is a new firmware version for the EDT-FT5x06 chip. Add
> support for detecting the firmware version and handle the
> differences appropriately.
>
> Signed-off-by: Lothar WaÃmann <LW@xxxxxxxxxxxxxxxxxxx> ---
> drivers/input/touchscreen/edt-ft5x06.c | 358
> ++++++++++++++++++++++++-------- 1 file changed, 276 insertions(+),
> 82 deletions(-)
>
> diff --git a/drivers/input/touchscreen/edt-ft5x06.c
> b/drivers/input/touchscreen/edt-ft5x06.c index 565f0cd..936d269
> 100644 --- a/drivers/input/touchscreen/edt-ft5x06.c +++
> b/drivers/input/touchscreen/edt-ft5x06.c @@ -1,5 +1,6 @@ /* *
> Copyright (C) 2012 Simon Budig, <simon.budig@xxxxxxxxxxxxxxxxx> + *
> Daniel Wagener <daniel.wagener@xxxxxxxxxxxxxxxxx> (M09 firmware
> support) * Lothar WaÃmann <LW@xxxxxxxxxxxxxxxxxxx> (DT support) * *
> This software is licensed under the terms of the GNU General
> Public @@ -47,6 +48,14 @@ #define WORK_REGISTER_NUM_X 0x33 #define
> WORK_REGISTER_NUM_Y 0x34
>
> +#define M09_REGISTER_THRESHOLD 0x80 +#define M09_REGISTER_GAIN
> 0x92 +#define M09_REGISTER_OFFSET 0x93 +#define M09_REGISTER_NUM_X
> 0x94 +#define M09_REGISTER_NUM_Y 0x95 + +#define NO_REGISTER
> 0xff + #define WORK_REGISTER_OPMODE 0x3c #define
> FACTORY_REGISTER_OPMODE 0x01
>
> @@ -61,6 +70,20 @@ #define EDT_RAW_DATA_RETRIES 100 #define
> EDT_RAW_DATA_DELAY 1 /* msec */
>
> +enum edt_ver { + M06, + M09, +}; + +struct edt_reg_addr { + int
> reg_threshold; + int reg_report_rate; + int reg_gain; + int
> reg_offset; + int reg_num_x; + int reg_num_y; +}; + struct
> edt_ft5x06_ts_data { struct i2c_client *client; struct input_dev
> *input; @@ -85,6 +108,9 @@ struct edt_ft5x06_ts_data { int
> report_rate;
>
> char name[EDT_NAME_LEN]; + + struct edt_reg_addr reg_addr; + enum
> edt_ver version; };
>
> static int edt_ft5x06_ts_readwrite(struct i2c_client *client, @@
> -142,33 +168,58 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq,
> void *dev_id) { struct edt_ft5x06_ts_data *tsdata = dev_id; struct
> device *dev = &tsdata->client->dev; - u8 cmd = 0xf9; - u8
> rdbuf[26]; + u8 cmd; + u8 rdbuf[29]; int i, type, x, y, id; + int
> offset, tplen, datalen; int error;
>
> + switch (tsdata->version) { + case M06: + cmd = 0xf9; /* tell the
> controller to send touch data */ + offset = 5; /* where the actual
> touch data starts */ + tplen = 4; /* data comes in so called
> frames */ + datalen = 26; /* how much bytes to listen for */ +
> break; + + case M09: + cmd = 0x02; + offset = 1; + tplen = 6; +
> datalen = 29; + break; + + default: + goto out; + } +
> memset(rdbuf, 0, sizeof(rdbuf));
>
> error = edt_ft5x06_ts_readwrite(tsdata->client, sizeof(cmd), &cmd,
> - sizeof(rdbuf), rdbuf); + datalen, rdbuf); if (error) {
> dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
> error); goto out; }
>
> - if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || rdbuf[2] != 26) { -
> dev_err_ratelimited(dev, "Unexpected header: %02x%02x%02x!\n", -
> rdbuf[0], rdbuf[1], rdbuf[2]); - goto out; - } + /* M09 does not
> send header or CRC */ + if (tsdata->version == M06) { + if
> (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || + rdbuf[2] != datalen)
> { + dev_err_ratelimited(dev, + "Unexpected header:
> %02x%02x%02x!\n", + rdbuf[0], rdbuf[1], rdbuf[2]); + goto
> out; + }
>
> - if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, 26)) - goto out; +
> if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, datalen)) + goto
> out; + }
>
> for (i = 0; i < MAX_SUPPORT_POINTS; i++) { - u8 *buf = &rdbuf[i *
> 4 + 5]; + u8 *buf = &rdbuf[i * tplen + offset]; bool down;
>
> type = buf[0] >> 6; @@ -176,8 +227,8 @@ static irqreturn_t
> edt_ft5x06_ts_isr(int irq, void *dev_id) if (type ==
> TOUCH_EVENT_RESERVED) continue;
>
> - /* ignore TOUCH_DOWN events, might have bogus coordinates */ -
> if (type == TOUCH_EVENT_DOWN) + /* M06 sometimes sends bogus
> coordinates in TOUCH_DOWN */ + if (tsdata->version == M06 && type
> == TOUCH_EVENT_DOWN) continue;
>
> x = ((buf[0] << 8) | buf[1]) & 0x0fff; @@ -207,12 +258,25 @@ static
> int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata, {
> u8 wrbuf[4];
>
> - wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; - wrbuf[1] =
> tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; - wrbuf[2] =
> value; - wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2]; - - return
> edt_ft5x06_ts_readwrite(tsdata->client, 4, wrbuf, 0, NULL); +
> switch (tsdata->version) { + case M06: + wrbuf[0] =
> tsdata->factory_mode ? 0xf3 : 0xfc; + wrbuf[1] =
> tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; + wrbuf[1] =
> tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; + wrbuf[2] =
> value; + wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2]; + return
> edt_ft5x06_ts_readwrite(tsdata->client, 4, + wrbuf, 0, NULL); +
> case M09: + wrbuf[0] = addr; + wrbuf[1] = value; + + return
> edt_ft5x06_ts_readwrite(tsdata->client, 3, + wrbuf, 0, NULL);
> + + default: + return -EINVAL; + } }
>
> static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data
> *tsdata, @@ -221,19 +285,35 @@ static int
> edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata, u8
> wrbuf[2], rdbuf[2]; int error;
>
> - wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; - wrbuf[1] =
> tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; - wrbuf[1] |=
> tsdata->factory_mode ? 0x80 : 0x40; + switch (tsdata->version) { +
> case M06: + wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; +
> wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; +
> wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
>
> - error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2,
> rdbuf); - if (error) + error =
> edt_ft5x06_ts_readwrite(tsdata->client, + 2, wrbuf, 2,
> rdbuf); return error;
>
> - if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) { -
> dev_err(&tsdata->client->dev, - "crc error: 0x%02x expected, got
> 0x%02x\n", - wrbuf[0] ^ wrbuf[1] ^ rdbuf[0], rdbuf[1]); - return
> -EIO; + if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) { +
> dev_err(&tsdata->client->dev, + "crc error: 0x%02x expected, got
> 0x%02x\n", + wrbuf[0] ^ wrbuf[1] ^ rdbuf[0], + rdbuf[1]); +
> return -EIO; + } + break; + + case M09: + wrbuf[0] = addr; +
> error = edt_ft5x06_ts_readwrite(tsdata->client, 1, + wrbuf, 1,
> rdbuf); + if (error) + return error; + break; + + default: +
> return -EINVAL; }
>
> return rdbuf[0]; @@ -244,19 +324,21 @@ struct edt_ft5x06_attribute
> { size_t field_offset; u8 limit_low; u8 limit_high; - u8 addr; + u8
> addr_m06; + u8 addr_m09; };
>
> -#define EDT_ATTR(_field, _mode, _addr, _limit_low, _limit_high)
> \ +#define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, \ +
> _limit_low, _limit_high) \ struct edt_ft5x06_attribute
> edt_ft5x06_attr_##_field = { \ .dattr = __ATTR(_field, _mode, \
> edt_ft5x06_setting_show, \ edt_ft5x06_setting_store), \ -
> .field_offset = \ - offsetof(struct edt_ft5x06_ts_data,
> _field), \ + .field_offset = offsetof(struct edt_ft5x06_ts_data,
> _field), \ + .addr_m06 = _addr_m06, \ + .addr_m09 =
> _addr_m09, \ .limit_low = _limit_low, \ .limit_high =
> _limit_high, \ - .addr = _addr, \ }
>
> static ssize_t edt_ft5x06_setting_show(struct device *dev, @@
> -271,6 +353,7 @@ static ssize_t edt_ft5x06_setting_show(struct
> device *dev, int val; size_t count = 0; int error = 0; + u8 addr;
>
> mutex_lock(&tsdata->mutex);
>
> @@ -279,15 +362,33 @@ static ssize_t edt_ft5x06_setting_show(struct
> device *dev, goto out; }
>
> - val = edt_ft5x06_register_read(tsdata, attr->addr); - if (val <
> 0) { - error = val; - dev_err(&tsdata->client->dev, - "Failed
> to fetch attribute %s, error %d\n", - dattr->attr.name, error); +
> switch (tsdata->version) { + case M06: + addr = attr->addr_m06; +
> break; + + case M09: + addr = attr->addr_m09; + break; + +
> default: + error = -ENODEV; goto out; }
>
> + if (addr != NO_REGISTER) { + val =
> edt_ft5x06_register_read(tsdata, addr); + if (val < 0) { + error
> = val; + dev_err(&tsdata->client->dev, + "Failed to fetch
> attribute %s, error %d\n", + dattr->attr.name, error); + goto
> out; + } + } else { + val = *field; + } + if (val != *field) {
> dev_warn(&tsdata->client->dev, "%s: read (%d) and stored value (%d)
> differ\n", @@ -312,6 +413,7 @@ static ssize_t
> edt_ft5x06_setting_store(struct device *dev, u8 *field = (u8
> *)tsdata + attr->field_offset; unsigned int val; int error; + u8
> addr;
>
> mutex_lock(&tsdata->mutex);
>
> @@ -329,14 +431,29 @@ static ssize_t
> edt_ft5x06_setting_store(struct device *dev, goto out; }
>
> - error = edt_ft5x06_register_write(tsdata, attr->addr, val); - if
> (error) { - dev_err(&tsdata->client->dev, - "Failed to update
> attribute %s, error: %d\n", - dattr->attr.name, error); + switch
> (tsdata->version) { + case M06: + addr = attr->addr_m06; +
> break; + + case M09: + addr = attr->addr_m09; + break; + +
> default: + error = -ENODEV; goto out; }
>
> + if (addr != NO_REGISTER) { + error =
> edt_ft5x06_register_write(tsdata, addr, val); + if (error) { +
> dev_err(&tsdata->client->dev, + "Failed to update attribute %s,
> error: %d\n", + dattr->attr.name, error); + goto out; + } +
> } *field = val;
>
> out: @@ -344,12 +461,14 @@ out: return error ?: count; }
>
> -static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, 0,
> 31); -static EDT_ATTR(offset, S_IWUSR | S_IRUGO,
> WORK_REGISTER_OFFSET, 0, 31); -static EDT_ATTR(threshold, S_IWUSR |
> S_IRUGO, - WORK_REGISTER_THRESHOLD, 20, 80); -static
> EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, -
> WORK_REGISTER_REPORT_RATE, 3, 14); +static EDT_ATTR(gain, S_IWUSR |
> S_IRUGO, WORK_REGISTER_GAIN, + M09_REGISTER_GAIN, 0, 31); +static
> EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, +
> M09_REGISTER_OFFSET, 0, 31); +static EDT_ATTR(threshold, S_IWUSR |
> S_IRUGO, WORK_REGISTER_THRESHOLD, + M09_REGISTER_THRESHOLD, 20,
> 80); +static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO,
> WORK_REGISTER_REPORT_RATE, + NO_REGISTER, 3, 14);
>
> static struct attribute *edt_ft5x06_attrs[] = {
> &edt_ft5x06_attr_gain.dattr.attr, @@ -384,6 +503,9 @@ static int
> edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata) }
>
> /* mode register is 0x3c when in the work mode */ + if
> (tsdata->version == M09) + goto m09_out; + error =
> edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03); if
> (error) { dev_err(&client->dev, @@ -416,12 +538,18 @@ err_out:
> enable_irq(client->irq);
>
> return error; + +m09_out: + dev_err(&client->dev, "No factory mode
> support for M09\n"); + return -EINVAL; + }
>
> static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
> { struct i2c_client *client = tsdata->client; int retries =
> EDT_SWITCH_MODE_RETRIES; + struct edt_reg_addr *reg_addr =
> &tsdata->reg_addr; int ret; int error;
>
> @@ -454,13 +582,14 @@ static int edt_ft5x06_work_mode(struct
> edt_ft5x06_ts_data *tsdata) tsdata->raw_buffer = NULL;
>
> /* restore parameters */ - edt_ft5x06_register_write(tsdata,
> WORK_REGISTER_THRESHOLD, + edt_ft5x06_register_write(tsdata,
> reg_addr->reg_threshold, tsdata->threshold); -
> edt_ft5x06_register_write(tsdata, WORK_REGISTER_GAIN, +
> edt_ft5x06_register_write(tsdata, reg_addr->reg_gain,
> tsdata->gain); - edt_ft5x06_register_write(tsdata,
> WORK_REGISTER_OFFSET, + edt_ft5x06_register_write(tsdata,
> reg_addr->reg_offset, tsdata->offset); -
> edt_ft5x06_register_write(tsdata, WORK_REGISTER_REPORT_RATE, + if
> (reg_addr->reg_report_rate) + edt_ft5x06_register_write(tsdata,
> reg_addr->reg_report_rate, tsdata->report_rate);
>
> enable_irq(client->irq); @@ -663,30 +792,60 @@ static int
> edt_ft5x06_ts_reset(struct i2c_client *client, }
>
> static int edt_ft5x06_ts_identify(struct i2c_client *client, -
> char *model_name, - char *fw_version) + struct
> edt_ft5x06_ts_data *tsdata, + char *fw_version) { u8
> rdbuf[EDT_NAME_LEN]; char *p; int error; + char *model_name =
> tsdata->name;
>
> + /* see what we find if we assume it is a M06 * + * if we get
> less than EDT_NAME_LEN, we don't want + * to have garbage in
> there + */ + memset(rdbuf, 0, sizeof(rdbuf)); error =
> edt_ft5x06_ts_readwrite(client, 1, "\xbb", EDT_NAME_LEN - 1,
> rdbuf); if (error) return error;
>
> - /* remove last '$' end marker */ - rdbuf[EDT_NAME_LEN - 1] =
> '\0'; - if (rdbuf[EDT_NAME_LEN - 2] == '$') - rdbuf[EDT_NAME_LEN -
> 2] = '\0'; + /* if we find something consistent, stay with that
> assumption + * at least M09 won't send 3 bytes here + */ + if
> (!(strnicmp(rdbuf + 1, "EP0", 3))) { + tsdata->version = M06; + +
> /* remove last '$' end marker */ + rdbuf[EDT_NAME_LEN - 1] =
> '\0'; + if (rdbuf[EDT_NAME_LEN - 2] == '$') + rdbuf[EDT_NAME_LEN
> - 2] = '\0'; + + /* look for Model/Version separator */ + p =
> strchr(rdbuf, '*'); + if (p) + *p++ = '\0'; +
> strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN); +
> strlcpy(fw_version, p ? p : "", EDT_NAME_LEN); + } else { + /*
> since there are only two versions around (M06, M09) */ +
> tsdata->version = M09; + + error = edt_ft5x06_ts_readwrite(client,
> 1, "\xA6", + 2, rdbuf); + if (error) + return error;
>
> - /* look for Model/Version separator */ - p = strchr(rdbuf, '*');
> - if (p) - *p++ = '\0'; + strlcpy(fw_version, rdbuf, 2);
>
> - strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN); -
> strlcpy(fw_version, p ? p : "", EDT_NAME_LEN); + error =
> edt_ft5x06_ts_readwrite(client, 1, "\xA8", + 1, rdbuf); + if
> (error) + return error; + + snprintf(model_name, EDT_NAME_LEN,
> "EP0%i%i0M09", + rdbuf[0] >> 4, rdbuf[0] & 0x0F); + }
>
> return 0; } @@ -705,36 +864,69 @@ static int
> edt_ft5x06_ts_identify(struct i2c_client *client, static void
> edt_ft5x06_ts_get_dt_defaults(struct device_node *np, struct
> edt_ft5x06_ts_data *tsdata) { - EDT_GET_PROP(threshold,
> WORK_REGISTER_THRESHOLD); - EDT_GET_PROP(gain,
> WORK_REGISTER_GAIN); - EDT_GET_PROP(offset, WORK_REGISTER_OFFSET);
> + struct edt_reg_addr *reg_addr = &tsdata->reg_addr; + +
> EDT_GET_PROP(threshold, reg_addr->reg_threshold); +
> EDT_GET_PROP(gain, reg_addr->reg_gain); + EDT_GET_PROP(offset,
> reg_addr->reg_offset); }
>
> static void edt_ft5x06_ts_get_defaults(struct edt_ft5x06_ts_data
> *tsdata, const struct edt_ft5x06_platform_data *pdata) { + struct
> edt_reg_addr *reg_addr = &tsdata->reg_addr; + if
> (!pdata->use_parameters) return;
>
> /* pick up defaults from the platform data */ -
> EDT_ATTR_CHECKSET(threshold, WORK_REGISTER_THRESHOLD); -
> EDT_ATTR_CHECKSET(gain, WORK_REGISTER_GAIN); -
> EDT_ATTR_CHECKSET(offset, WORK_REGISTER_OFFSET); -
> EDT_ATTR_CHECKSET(report_rate, WORK_REGISTER_REPORT_RATE); +
> EDT_ATTR_CHECKSET(threshold, reg_addr->reg_threshold); +
> EDT_ATTR_CHECKSET(gain, reg_addr->reg_gain); +
> EDT_ATTR_CHECKSET(offset, reg_addr->reg_offset); + if
> (reg_addr->reg_report_rate != NO_REGISTER) +
> EDT_ATTR_CHECKSET(report_rate, reg_addr->reg_report_rate); }
>
> static void edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data
> *tsdata) { + struct edt_reg_addr *reg_addr = &tsdata->reg_addr; +
> tsdata->threshold = edt_ft5x06_register_read(tsdata, -
> WORK_REGISTER_THRESHOLD); - tsdata->gain =
> edt_ft5x06_register_read(tsdata, WORK_REGISTER_GAIN); -
> tsdata->offset = edt_ft5x06_register_read(tsdata,
> WORK_REGISTER_OFFSET); - tsdata->report_rate =
> edt_ft5x06_register_read(tsdata, -
> WORK_REGISTER_REPORT_RATE); - tsdata->num_x =
> edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_X); -
> tsdata->num_y = edt_ft5x06_register_read(tsdata,
> WORK_REGISTER_NUM_Y); + reg_addr->reg_threshold); +
> tsdata->gain = edt_ft5x06_register_read(tsdata,
> reg_addr->reg_gain); + tsdata->offset =
> edt_ft5x06_register_read(tsdata, reg_addr->reg_offset); + if
> (reg_addr->reg_report_rate != NO_REGISTER) + tsdata->report_rate =
> edt_ft5x06_register_read(tsdata, +
> reg_addr->reg_report_rate); + tsdata->num_x =
> edt_ft5x06_register_read(tsdata, reg_addr->reg_num_x); +
> tsdata->num_y = edt_ft5x06_register_read(tsdata,
> reg_addr->reg_num_y); +} + +static void
> +edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata) +{ +
> struct edt_reg_addr *reg_addr = &tsdata->reg_addr; + + switch
> (tsdata->version) { + case M06: + reg_addr->reg_threshold =
> WORK_REGISTER_THRESHOLD; + reg_addr->reg_report_rate =
> WORK_REGISTER_REPORT_RATE; + reg_addr->reg_gain =
> WORK_REGISTER_GAIN; + reg_addr->reg_offset =
> WORK_REGISTER_OFFSET; + reg_addr->reg_num_x =
> WORK_REGISTER_NUM_X; + reg_addr->reg_num_y = WORK_REGISTER_NUM_Y;
> + break; + + case M09: + reg_addr->reg_threshold =
> M09_REGISTER_THRESHOLD; + reg_addr->reg_gain = M09_REGISTER_GAIN;
> + reg_addr->reg_offset = M09_REGISTER_OFFSET; +
> reg_addr->reg_num_x = M09_REGISTER_NUM_X; + reg_addr->reg_num_y =
> M09_REGISTER_NUM_Y; + break; + } }
>
> #ifdef CONFIG_OF @@ -818,12 +1010,14 @@ static int
> edt_ft5x06_ts_probe(struct i2c_client *client, tsdata->input =
> input; tsdata->factory_mode = false;
>
> - error = edt_ft5x06_ts_identify(client, tsdata->name,
> fw_version); + error = edt_ft5x06_ts_identify(client, tsdata,
> fw_version); if (error) { dev_err(&client->dev, "touchscreen probe
> failed\n"); return error; }
>
> + edt_ft5x06_ts_set_regs(tsdata); + if (!pdata)
> edt_ft5x06_ts_get_dt_defaults(client->dev.of_node, tsdata); else
>
Signed-off-by: Daniel Wagener <daniel.wagener@xxxxxxxxxxxxxxxxx>
- --
kernel concepts GmbH Tel: +49-271-771091-10
Sieghuetter Hauptweg 48
D-57072 Siegen
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