From: Simon Budig <simon.budig@xxxxxxxxxxxxxxxxx>
Since the driver also is useful for some non-EDT touchscreens based on
the focaltec chips introduce the concept of a "generic" focaltec based
touch.
Use a better heuristics for model detection and be more specific in the
source.
Signed-off-by: Simon Budig <simon.budig@xxxxxxxxxxxxxxxxx>
---
drivers/input/touchscreen/edt-ft5x06.c | 122 +++++++++++++++++++++++++--------
1 file changed, 93 insertions(+), 29 deletions(-)
diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index 867a61e..d128445 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -70,8 +70,9 @@
#define EDT_RAW_DATA_DELAY 1000 /* usec */
enum edt_ver {
- M06,
- M09,
+ EDT_M06,
+ EDT_M09,
+ GENERIC_FT,
};
struct edt_reg_addr {
@@ -179,14 +180,15 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
int error;
switch (tsdata->version) {
- case M06:
+ case EDT_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 */
crclen = 1; /* length of the crc data */
break;
- case M09:
+ case EDT_M09:
+ case GENERIC_FT:
cmd = 0x0;
offset = 3;
tplen = 6;
@@ -210,7 +212,7 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
}
/* M09 does not send header or CRC */
- if (tsdata->version == M06) {
+ if (tsdata->version == EDT_M06) {
if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa ||
rdbuf[2] != datalen) {
dev_err_ratelimited(dev,
@@ -233,7 +235,7 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
continue;
/* M06 sometimes sends bogus coordinates in TOUCH_DOWN */
- if (tsdata->version == M06 && type == TOUCH_EVENT_DOWN)
+ if (tsdata->version == EDT_M06 && type == TOUCH_EVENT_DOWN)
continue;
x = ((buf[0] << 8) | buf[1]) & 0x0fff;
@@ -264,14 +266,15 @@ static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
u8 wrbuf[4];
switch (tsdata->version) {
- case M06:
+ case EDT_M06:
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);
- case M09:
+ case EDT_M09:
+ case GENERIC_FT:
wrbuf[0] = addr;
wrbuf[1] = value;
@@ -290,7 +293,7 @@ static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
int error;
switch (tsdata->version) {
- case M06:
+ case EDT_M06:
wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
@@ -309,7 +312,8 @@ static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
}
break;
- case M09:
+ case EDT_M09:
+ case GENERIC_FT:
wrbuf[0] = addr;
error = edt_ft5x06_ts_readwrite(tsdata->client, 1,
wrbuf, 1, rdbuf);
@@ -368,11 +372,12 @@ static ssize_t edt_ft5x06_setting_show(struct device *dev,
}
switch (tsdata->version) {
- case M06:
+ case EDT_M06:
addr = attr->addr_m06;
break;
- case M09:
+ case EDT_M09:
+ case GENERIC_FT:
addr = attr->addr_m09;
break;
@@ -437,11 +442,12 @@ static ssize_t edt_ft5x06_setting_store(struct device *dev,
}
switch (tsdata->version) {
- case M06:
+ case EDT_M06:
addr = attr->addr_m06;
break;
- case M09:
+ case EDT_M09:
+ case GENERIC_FT:
addr = attr->addr_m09;
break;
@@ -508,7 +514,7 @@ 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)
+ if (tsdata->version != EDT_M06)
goto m09_out;
error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03);
@@ -545,7 +551,7 @@ static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
return error;
m09_out:
- dev_err(&client->dev, "No factory mode support for M09\n");
+ dev_err(&client->dev, "No factory mode support for M09/GENERIC_FT\n");
return -EINVAL;
}
@@ -779,7 +785,7 @@ static int edt_ft5x06_ts_identify(struct i2c_client *client,
* at least M09 won't send 3 bytes here
*/
if (!(strncasecmp(rdbuf + 1, "EP0", 3))) {
- tsdata->version = M06;
+ tsdata->version = EDT_M06;
/* remove last '$' end marker */
rdbuf[EDT_NAME_LEN - 1] = '\0';
@@ -793,8 +799,16 @@ static int edt_ft5x06_ts_identify(struct i2c_client *client,
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;
+ /* if it is not an EDT M06 touchscreen then the model
+ * detection is a bit hairy. The different ft5x06
+ * firmares around don't reliably implement the
+ * identification registers. Well. we'll take a shot.
+ *
+ * the main difference between generic focaltec based
+ * touches and EDT M09 is, that we know how to retrieve
+ * the max coordinates for the latter
+ */
+ tsdata->version = GENERIC_FT;
error = edt_ft5x06_ts_readwrite(client, 1, "\xA6",
2, rdbuf);
@@ -808,8 +822,34 @@ static int edt_ft5x06_ts_identify(struct i2c_client *client,
if (error)
return error;
- snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09",
- rdbuf[0] >> 4, rdbuf[0] & 0x0F);
+ /* this "model identification is not exact. Unfortunately
+ * not all firmwares for the ft5x06 put useful values in
+ * the identification registers
+ */
+ switch (rdbuf[0]) {
+ case 0x35: /* EDT EP0350M09 */
+ case 0x43: /* EDT EP0430M09 */
+ case 0x50: /* EDT EP0500M09 */
+ case 0x57: /* EDT EP0570M09 */
+ case 0x70: /* EDT EP0700M09 */
+ tsdata->version = EDT_M09;
+ snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09",
+ rdbuf[0] >> 4, rdbuf[0] & 0x0F);
+ break;
+ case 0xa1: /* EDT EP1010ML00 */
+ tsdata->version = EDT_M09;
+ snprintf(model_name, EDT_NAME_LEN, "EP%i%i0ML00",
+ rdbuf[0] >> 4, rdbuf[0] & 0x0F);
+ break;
+ case 0x5a: /* Solomon Goldentek Display */
+ snprintf(model_name, EDT_NAME_LEN, "GKTW50SCED1R0");
+ break;
+ default:
+ snprintf(model_name, EDT_NAME_LEN,
+ "generic ft5x06 (%02x)",
+ rdbuf[0]);
+ break;
+ }
}
return 0;
@@ -853,8 +893,16 @@ edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
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);
+ if (tsdata->version == EDT_M06 ||
+ tsdata->version == EDT_M09) {
+ 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);
+ } else {
+ tsdata->num_x = -1;
+ tsdata->num_y = -1;
+ }
}
static void
@@ -863,7 +911,7 @@ 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:
+ case EDT_M06:
reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD;
reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE;
reg_addr->reg_gain = WORK_REGISTER_GAIN;
@@ -872,7 +920,7 @@ edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
reg_addr->reg_num_y = WORK_REGISTER_NUM_Y;
break;
- case M09:
+ case EDT_M09:
reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
reg_addr->reg_report_rate = NO_REGISTER;
reg_addr->reg_gain = M09_REGISTER_GAIN;
@@ -880,6 +928,13 @@ edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
reg_addr->reg_num_x = M09_REGISTER_NUM_X;
reg_addr->reg_num_y = M09_REGISTER_NUM_Y;
break;
+
+ case GENERIC_FT:
+ /* this is guesswork */
+ reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
+ reg_addr->reg_gain = M09_REGISTER_GAIN;
+ reg_addr->reg_offset = M09_REGISTER_OFFSET;
+ break;
}
}
@@ -973,10 +1028,19 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
input->id.bustype = BUS_I2C;
input->dev.parent = &client->dev;
- input_set_abs_params(input, ABS_MT_POSITION_X,
- 0, tsdata->num_x * 64 - 1, 0, 0);
- input_set_abs_params(input, ABS_MT_POSITION_Y,
- 0, tsdata->num_y * 64 - 1, 0, 0);
+ if (tsdata->version == EDT_M06 ||
+ tsdata->version == EDT_M09) {
+ input_set_abs_params(input, ABS_MT_POSITION_X,
+ 0, tsdata->num_x * 64 - 1, 0, 0);
+ input_set_abs_params(input, ABS_MT_POSITION_Y,
+ 0, tsdata->num_y * 64 - 1, 0, 0);
+ } else {
+ /* unknown maximum values. Specify via devicetree */
+ input_set_abs_params(input, ABS_MT_POSITION_X,
+ 0, 65535, 0, 0);
+ input_set_abs_params(input, ABS_MT_POSITION_Y,
+ 0, 65535, 0, 0);
+ }
touchscreen_parse_properties(input, true, &tsdata->prop);
--
2.1.4
--
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