diff options
author | Lothar Waßmann <LW@KARO-electronics.de> | 2014-03-28 09:31:14 -0700 |
---|---|---|
committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-03-28 09:33:07 -0700 |
commit | fd335ab04b3f1b3309dfbfea71a1a79a7bacc4ad (patch) | |
tree | 7ee9107cdec1eefb5587a3c67429c762e5c08d5a /drivers | |
parent | ee3e946e31e6df0f9845f9b3d527252003603530 (diff) |
Input: edt-ft5x06 - add support for M09 firmware version
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 Waßmann <LW@KARO-electronics.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/input/touchscreen/edt-ft5x06.c | 358 |
1 files changed, 276 insertions, 82 deletions
diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c index dd94b9eea6e7..75b666bd2654 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@kernelconcepts.de> + * Daniel Wagener <daniel.wagener@kernelconcepts.de> (M09 firmware support) * Lothar Waßmann <LW@KARO-electronics.de> (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 |