From: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Dmitry Osipenko <digetx@gmail.com>,
Johnny Chuang <johnny.chuang.emc@gmail.com>,
linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH RESEND v8 3/4] input: elants: read touchscreen size for EKTF3624
Date: Fri, 11 Dec 2020 07:53:56 +0100 [thread overview]
Message-ID: <fa6a0e3f95803d6eab39cd0e3ba188842274a1e0.1607669375.git.mirq-linux@rere.qmqm.pl> (raw)
In-Reply-To: <cover.1607669375.git.mirq-linux@rere.qmqm.pl>
EKTF3624 as present in Asus TF300T tablet has touchscreen size encoded
in different registers.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/input/touchscreen/elants_i2c.c | 84 ++++++++++++++++++++++++--
1 file changed, 79 insertions(+), 5 deletions(-)
diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
index f1bf3e000e96..c24d8cdc4251 100644
--- a/drivers/input/touchscreen/elants_i2c.c
+++ b/drivers/input/touchscreen/elants_i2c.c
@@ -35,7 +35,7 @@
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/acpi.h>
-#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <asm/unaligned.h>
@@ -43,6 +43,10 @@
/* Device, Driver information */
#define DEVICE_NAME "elants_i2c"
+/* Device IDs */
+#define EKTH3500 0
+#define EKTF3624 1
+
/* Convert from rows or columns into resolution */
#define ELAN_TS_RESOLUTION(n, m) (((n) - 1) * (m))
@@ -94,6 +98,8 @@
#define E_ELAN_INFO_REK 0xD0
#define E_ELAN_INFO_TEST_VER 0xE0
#define E_ELAN_INFO_FW_ID 0xF0
+#define E_INFO_X_RES 0x60
+#define E_INFO_Y_RES 0x63
#define E_INFO_OSR 0xD6
#define E_INFO_PHY_SCAN 0xD7
#define E_INFO_PHY_DRIVER 0xD8
@@ -157,6 +163,7 @@ struct elants_data {
bool wake_irq_enabled;
bool keep_power_in_suspend;
+ u8 chip_id;
/* Must be last to be used for DMA operations */
u8 buf[MAX_PACKET_SIZE] ____cacheline_aligned;
@@ -434,7 +441,58 @@ static int elants_i2c_query_bc_version(struct elants_data *ts)
return 0;
}
-static int elants_i2c_query_ts_info(struct elants_data *ts)
+static int elants_i2c_query_ts_info_ektf(struct elants_data *ts)
+{
+ struct i2c_client *client = ts->client;
+ int error;
+ u8 resp[4];
+ u16 phy_x, phy_y;
+ const u8 get_xres_cmd[] = {
+ CMD_HEADER_READ, E_INFO_X_RES, 0x00, 0x00
+ };
+ const u8 get_yres_cmd[] = {
+ CMD_HEADER_READ, E_INFO_Y_RES, 0x00, 0x00
+ };
+
+ /* Get X/Y size in mm */
+ error = elants_i2c_execute_command(client, get_xres_cmd,
+ sizeof(get_xres_cmd),
+ resp, sizeof(resp), 1,
+ "get X size");
+ if (error)
+ return error;
+
+ phy_x = resp[2] | ((resp[3] & 0xF0) << 4);
+
+ error = elants_i2c_execute_command(client, get_yres_cmd,
+ sizeof(get_yres_cmd),
+ resp, sizeof(resp), 1,
+ "get Y size");
+ if (error)
+ return error;
+
+ phy_y = resp[2] | ((resp[3] & 0xF0) << 4);
+
+ if (!phy_x || !phy_y) {
+ dev_warn(&client->dev,
+ "invalid size data: %d x %d mm\n",
+ phy_x, phy_y);
+ return 0;
+ }
+
+ dev_dbg(&client->dev, "phy_x=%d, phy_y=%d\n", phy_x, phy_y);
+
+ /* calculate resolution from size */
+ ts->x_max = 2240-1;
+ ts->x_res = DIV_ROUND_CLOSEST(ts->prop.max_x, phy_x);
+
+ ts->y_max = 1408-1;
+ ts->y_res = DIV_ROUND_CLOSEST(ts->prop.max_y, phy_y);
+
+ return 0;
+}
+
+static int elants_i2c_query_ts_info_ekth(struct elants_data *ts)
{
struct i2c_client *client = ts->client;
int error;
@@ -588,8 +646,20 @@ static int elants_i2c_initialize(struct elants_data *ts)
error = elants_i2c_query_fw_version(ts);
if (!error)
error = elants_i2c_query_test_version(ts);
- if (!error)
- error = elants_i2c_query_ts_info(ts);
+
+ switch (ts->chip_id) {
+ case EKTH3500:
+ if (!error)
+ error = elants_i2c_query_ts_info_ekth(ts);
+ break;
+ case EKTF3624:
+ if (!error)
+ error = elants_i2c_query_ts_info_ektf(ts);
+ break;
+ default:
+ unreachable();
+ break;
+ }
if (error)
ts->iap_mode = ELAN_IAP_RECOVERY;
@@ -1266,6 +1336,9 @@ static int elants_i2c_probe(struct i2c_client *client,
ts->client = client;
i2c_set_clientdata(client, ts);
+ if (client->dev.of_node)
+ ts->chip_id = (uintptr_t)of_device_get_match_data(&client->dev);
+
ts->vcc33 = devm_regulator_get(&client->dev, "vcc33");
if (IS_ERR(ts->vcc33)) {
error = PTR_ERR(ts->vcc33);
@@ -1495,7 +1568,8 @@ MODULE_DEVICE_TABLE(acpi, elants_acpi_id);
#ifdef CONFIG_OF
static const struct of_device_id elants_of_match[] = {
- { .compatible = "elan,ekth3500" },
+ { .compatible = "elan,ekth3500", .data = (void *)EKTH3500 },
+ { .compatible = "elan,ektf3624", .data = (void *)EKTF3624 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, elants_of_match);
--
2.20.1
next prev parent reply other threads:[~2020-12-11 6:55 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-11 6:53 [PATCH RESEND v8 0/4] input: elants: Support Asus TF300T and Nexus 7 touchscreens Michał Mirosław
2020-12-11 6:53 ` [PATCH RESEND v8 2/4] input: elants: support old touch report format Michał Mirosław
2020-12-11 7:29 ` Dmitry Torokhov
2020-12-11 16:09 ` Michał Mirosław
2020-12-11 16:39 ` Dmitry Osipenko
2020-12-11 17:04 ` Michał Mirosław
2020-12-11 18:48 ` Dmitry Torokhov
2021-01-07 22:06 ` Dmitry Osipenko
2021-01-22 20:10 ` Dmitry Osipenko
2021-01-22 22:37 ` Michał Mirosław
2021-01-23 14:07 ` Dmitry Osipenko
2020-12-11 6:53 ` [PATCH RESEND v8 1/4] input: elants: document some registers and values Michał Mirosław
2020-12-11 7:11 ` Dmitry Torokhov
2020-12-11 6:53 ` Michał Mirosław [this message]
2020-12-11 7:22 ` [PATCH RESEND v8 3/4] input: elants: read touchscreen size for EKTF3624 Dmitry Torokhov
2020-12-11 16:38 ` Michał Mirosław
2020-12-11 6:53 ` [PATCH RESEND v8 4/4] input: elants: support 0x66 reply opcode for reporting touches Michał Mirosław
2020-12-11 7:36 ` Dmitry Torokhov
-- strict thread matches above, loose matches on Subject: below --
2020-11-09 17:28 [PATCH RESEND v8 0/4] input: elants: Support Asus TF300T and Nexus 7 touchscreens Michał Mirosław
2020-11-09 17:28 ` [PATCH RESEND v8 3/4] input: elants: read touchscreen size for EKTF3624 Michał Mirosław
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