The current implementation of the goodix_berlin driver lacks support for
revisions A and B of the Berlin IC. This change adds support for the
gt9897 IC, which is a Berlin-A revision part.
The differences between revision D and A are rather minor, a handful of
address changes and a slightly larger read buffer. They were taken from
the driver published by Goodix, which does a few more things that don't
appear to be necessary for the touchscreen to work properly.
Signed-off-by: Jens Reidel <adr...@travitia.xyz>
Tested-by: Luca Weiss <luca.we...@fairphone.com>
---
drivers/input/touchscreen/goodix_berlin.h | 13 ++++++
.../input/touchscreen/goodix_berlin_core.c | 15 ++++---
drivers/input/touchscreen/goodix_berlin_i2c.c | 9 +++-
drivers/input/touchscreen/goodix_berlin_spi.c | 45 ++++++++++++++-----
4 files changed, 61 insertions(+), 21 deletions(-)
diff --git a/drivers/input/touchscreen/goodix_berlin.h
b/drivers/input/touchscreen/goodix_berlin.h
index 38b6f9ddbdef..b186a7fb3586 100644
--- a/drivers/input/touchscreen/goodix_berlin.h
+++ b/drivers/input/touchscreen/goodix_berlin.h
@@ -12,6 +12,19 @@
#include <linux/pm.h>
+#define GOODIX_BERLIN_FW_VERSION_INFO_ADDR_A 0x1000C
+#define GOODIX_BERLIN_FW_VERSION_INFO_ADDR_D 0x10014
+
+#define GOODIX_BERLIN_IC_INFO_ADDR_A 0x10068
+#define GOODIX_BERLIN_IC_INFO_ADDR_D 0x10070
+
+struct goodix_berlin_ic_data {
+ int fw_version_info_addr;
+ int ic_info_addr;
+ ssize_t read_dummy_len;
+ ssize_t read_prefix_len;
+};
+
struct device;
struct input_id;
struct regmap;
diff --git a/drivers/input/touchscreen/goodix_berlin_core.c
b/drivers/input/touchscreen/goodix_berlin_core.c
index 3fc03cf0ca23..f9fbde63ab52 100644
--- a/drivers/input/touchscreen/goodix_berlin_core.c
+++ b/drivers/input/touchscreen/goodix_berlin_core.c
@@ -12,7 +12,7 @@
* to the previous generations.
*
* Currently the driver only handles Multitouch events with already
- * programmed firmware and "config" for "Revision D" Berlin IC.
+ * programmed firmware and "config" for "Revision A/D" Berlin IC.
*
* Support is missing for:
* - ESD Management
@@ -20,7 +20,7 @@
* - "Config" update/flashing
* - Stylus Events
* - Gesture Events
- * - Support for older revisions (A & B)
+ * - Support for revision B
*/
#include <linux/bitfield.h>
@@ -28,6 +28,7 @@
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
+#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/sizes.h>
@@ -53,10 +54,8 @@
#define GOODIX_BERLIN_DEV_CONFIRM_VAL 0xAA
#define GOODIX_BERLIN_BOOTOPTION_ADDR 0x10000
-#define GOODIX_BERLIN_FW_VERSION_INFO_ADDR 0x10014
#define GOODIX_BERLIN_IC_INFO_MAX_LEN SZ_1K
-#define GOODIX_BERLIN_IC_INFO_ADDR 0x10070
#define GOODIX_BERLIN_CHECKSUM_SIZE sizeof(u16)
@@ -297,9 +296,10 @@ static void goodix_berlin_power_off(struct goodix_berlin_core *cd)
static int goodix_berlin_read_version(struct goodix_berlin_core *cd)
{
+ const struct goodix_berlin_ic_data *ic_data =
device_get_match_data(cd->dev);
int error;
- error = regmap_raw_read(cd->regmap, GOODIX_BERLIN_FW_VERSION_INFO_ADDR,
+ error = regmap_raw_read(cd->regmap, ic_data->fw_version_info_addr,
&cd->fw_version, sizeof(cd->fw_version));
if (error) {
dev_err(cd->dev, "error reading fw version, %d\n", error);
@@ -358,6 +358,7 @@ static int goodix_berlin_parse_ic_info(struct
goodix_berlin_core *cd,
static int goodix_berlin_get_ic_info(struct goodix_berlin_core *cd)
{
+ const struct goodix_berlin_ic_data *ic_data =
device_get_match_data(cd->dev);
u8 *afe_data __free(kfree) = NULL;
__le16 length_raw;
u16 length;
@@ -367,7 +368,7 @@ static int goodix_berlin_get_ic_info(struct
goodix_berlin_core *cd)
if (!afe_data)
return -ENOMEM;
- error = regmap_raw_read(cd->regmap, GOODIX_BERLIN_IC_INFO_ADDR,
+ error = regmap_raw_read(cd->regmap, ic_data->ic_info_addr,
&length_raw, sizeof(length_raw));
if (error) {
dev_err(cd->dev, "failed get ic info length, %d\n", error);
@@ -380,7 +381,7 @@ static int goodix_berlin_get_ic_info(struct
goodix_berlin_core *cd)
return -EINVAL;
}
- error = regmap_raw_read(cd->regmap, GOODIX_BERLIN_IC_INFO_ADDR,
+ error = regmap_raw_read(cd->regmap, ic_data->ic_info_addr,
afe_data, length);
if (error) {
dev_err(cd->dev, "failed get ic info data, %d\n", error);
diff --git a/drivers/input/touchscreen/goodix_berlin_i2c.c
b/drivers/input/touchscreen/goodix_berlin_i2c.c
index ad7a60d94338..7db234c74db8 100644
--- a/drivers/input/touchscreen/goodix_berlin_i2c.c
+++ b/drivers/input/touchscreen/goodix_berlin_i2c.c
@@ -46,15 +46,20 @@ static int goodix_berlin_i2c_probe(struct i2c_client
*client)
return 0;
}
+static const struct goodix_berlin_ic_data gt9916_data = {
+ .fw_version_info_addr = GOODIX_BERLIN_FW_VERSION_INFO_ADDR_D,
+ .ic_info_addr = GOODIX_BERLIN_IC_INFO_ADDR_D,
+};
+
static const struct i2c_device_id goodix_berlin_i2c_id[] = {
- { "gt9916" },
+ { .name = "gt9916", .driver_data = (long)>9916_data },
{ }
};
MODULE_DEVICE_TABLE(i2c, goodix_berlin_i2c_id);
static const struct of_device_id goodix_berlin_i2c_of_match[] = {
- { .compatible = "goodix,gt9916", },
+ { .compatible = "goodix,gt9916", .data = >9916_data },
{ }
};
MODULE_DEVICE_TABLE(of, goodix_berlin_i2c_of_match);
diff --git a/drivers/input/touchscreen/goodix_berlin_spi.c
b/drivers/input/touchscreen/goodix_berlin_spi.c
index 0662e87b8692..a5e77e6585e8 100644
--- a/drivers/input/touchscreen/goodix_berlin_spi.c
+++ b/drivers/input/touchscreen/goodix_berlin_spi.c
@@ -18,10 +18,14 @@
#define GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN 1
#define GOODIX_BERLIN_REGISTER_WIDTH 4
-#define GOODIX_BERLIN_SPI_READ_DUMMY_LEN 3
-#define GOODIX_BERLIN_SPI_READ_PREFIX_LEN
(GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN + \
+#define GOODIX_BERLIN_SPI_READ_DUMMY_LEN_A 4
+#define GOODIX_BERLIN_SPI_READ_DUMMY_LEN_D 3
+#define GOODIX_BERLIN_SPI_READ_PREFIX_LEN_A
(GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN + \
GOODIX_BERLIN_REGISTER_WIDTH +
\
-
GOODIX_BERLIN_SPI_READ_DUMMY_LEN)
+
GOODIX_BERLIN_SPI_READ_DUMMY_LEN_A)
+#define GOODIX_BERLIN_SPI_READ_PREFIX_LEN_D
(GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN + \
+ GOODIX_BERLIN_REGISTER_WIDTH +
\
+
GOODIX_BERLIN_SPI_READ_DUMMY_LEN_D)
#define GOODIX_BERLIN_SPI_WRITE_PREFIX_LEN
(GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN + \
GOODIX_BERLIN_REGISTER_WIDTH)
@@ -33,6 +37,7 @@ static int goodix_berlin_spi_read(void *context, const void *reg_buf,
size_t val_size)
{
struct spi_device *spi = context;
+ const struct goodix_berlin_ic_data *ic_data =
spi_get_device_match_data(spi);
struct spi_transfer xfers;
struct spi_message spi_msg;
const u32 *reg = reg_buf; /* reg is stored as native u32 at start of
buffer */
@@ -42,23 +47,22 @@ static int goodix_berlin_spi_read(void *context, const void
*reg_buf,
return -EINVAL;
u8 *buf __free(kfree) =
- kzalloc(GOODIX_BERLIN_SPI_READ_PREFIX_LEN + val_size,
- GFP_KERNEL);
+ kzalloc(ic_data->read_prefix_len + val_size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
spi_message_init(&spi_msg);
memset(&xfers, 0, sizeof(xfers));
- /* buffer format: 0xF1 + addr(4bytes) + dummy(3bytes) + data */
+ /* buffer format: 0xF1 + addr(4bytes) + dummy(3/4bytes) + data */
buf[0] = GOODIX_BERLIN_SPI_READ_FLAG;
put_unaligned_be32(*reg, buf + GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN);
memset(buf + GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN +
GOODIX_BERLIN_REGISTER_WIDTH,
- 0xff, GOODIX_BERLIN_SPI_READ_DUMMY_LEN);
+ 0xff, ic_data->read_dummy_len);
xfers.tx_buf = buf;
xfers.rx_buf = buf;
- xfers.len = GOODIX_BERLIN_SPI_READ_PREFIX_LEN + val_size;
+ xfers.len = ic_data->read_prefix_len + val_size;
xfers.cs_change = 0;
spi_message_add_tail(&xfers, &spi_msg);
@@ -68,7 +72,7 @@ static int goodix_berlin_spi_read(void *context, const void *reg_buf,
return error;
}
- memcpy(val_buf, buf + GOODIX_BERLIN_SPI_READ_PREFIX_LEN, val_size);
+ memcpy(val_buf, buf + ic_data->read_prefix_len, val_size);
return error;
}
@@ -123,6 +127,7 @@ static const struct input_id goodix_berlin_spi_input_id = {
static int goodix_berlin_spi_probe(struct spi_device *spi)
{
+ const struct goodix_berlin_ic_data *ic_data =
spi_get_device_match_data(spi);
struct regmap_config regmap_config;
struct regmap *regmap;
size_t max_size;
@@ -137,7 +142,7 @@ static int goodix_berlin_spi_probe(struct spi_device *spi)
max_size = spi_max_transfer_size(spi);
regmap_config = goodix_berlin_spi_regmap_conf;
- regmap_config.max_raw_read = max_size -
GOODIX_BERLIN_SPI_READ_PREFIX_LEN;
+ regmap_config.max_raw_read = max_size - ic_data->read_prefix_len;
regmap_config.max_raw_write = max_size -
GOODIX_BERLIN_SPI_WRITE_PREFIX_LEN;
regmap = devm_regmap_init(&spi->dev, NULL, spi, ®map_config);
@@ -152,14 +157,30 @@ static int goodix_berlin_spi_probe(struct spi_device *spi)
return 0;
}
+static const struct goodix_berlin_ic_data gt9897_data = {
+ .fw_version_info_addr = GOODIX_BERLIN_FW_VERSION_INFO_ADDR_A,
+ .ic_info_addr = GOODIX_BERLIN_IC_INFO_ADDR_A,
+ .read_dummy_len = GOODIX_BERLIN_SPI_READ_DUMMY_LEN_A,
+ .read_prefix_len = GOODIX_BERLIN_SPI_READ_PREFIX_LEN_A,
+};
+
+static const struct goodix_berlin_ic_data gt9916_data = {
+ .fw_version_info_addr = GOODIX_BERLIN_FW_VERSION_INFO_ADDR_D,
+ .ic_info_addr = GOODIX_BERLIN_IC_INFO_ADDR_D,
+ .read_dummy_len = GOODIX_BERLIN_SPI_READ_DUMMY_LEN_D,
+ .read_prefix_len = GOODIX_BERLIN_SPI_READ_PREFIX_LEN_D,
+};
+
static const struct spi_device_id goodix_berlin_spi_ids[] = {
- { "gt9916" },
+ { .name = "gt9897", .driver_data = (long)>9897_data },
+ { .name = "gt9916", .driver_data = (long)>9916_data },
{ },
};
MODULE_DEVICE_TABLE(spi, goodix_berlin_spi_ids);
static const struct of_device_id goodix_berlin_spi_of_match[] = {
- { .compatible = "goodix,gt9916", },
+ { .compatible = "goodix,gt9897", .data = >9897_data },
+ { .compatible = "goodix,gt9916", .data = >9916_data },
{ }
};
MODULE_DEVICE_TABLE(of, goodix_berlin_spi_of_match);
