[PATCH] driver:input:touchscreen: improve the mechanism of auto-update

["simba.hsu" <simba.hsu@raydium.corp-partner.google.com>]

From: "simba.hsu" <simba.hsu@raydium.corp-partner.google.com>

Once auto-update has been interrupted, touch IC will be stuck in
recovery mode forever and it will lead to touch malfunction.
This patch makes auto-update available when touch IC is in
recovery mode to avoid touch malfunction.

Signed-off-by: simba.hsu <simba.hsu@rad-ic.com>
---
 drivers/input/touchscreen/raydium_i2c_ts.c | 53 ++++++++++++++++++----
 1 file changed, 45 insertions(+), 8 deletions(-)

diff --git a/drivers/input/touchscreen/raydium_i2c_ts.c b/drivers/input/touchscreen/raydium_i2c_ts.c
index 4d2d22a86977..50f6fbbe4775 100644
--- a/drivers/input/touchscreen/raydium_i2c_ts.c
+++ b/drivers/input/touchscreen/raydium_i2c_ts.c
@@ -36,7 +36,8 @@
 #define RM_CMD_BOOT_CHK		0x33		/* send data check */
 #define RM_CMD_BOOT_READ	0x44		/* send wait bl data ready*/
 
-#define RM_BOOT_RDY		0xFF		/* bl data ready */
+#define RM_BOOT_RDY		0xFF			/* bl data ready */
+#define RM_BOOT_CMD_READHWID	0x0E	/* read hwid */
 
 /* I2C main commands */
 #define RM_CMD_QUERY_BANK	0x2B
@@ -155,6 +156,7 @@ static int raydium_i2c_xfer(struct i2c_client *client, u32 addr,
 	 * sent first. Else, skip the header i.e. xfer[0].
 	 */
 	int xfer_start_idx = (addr > 0xff) ? 0 : 1;
+
 	xfer_count -= xfer_start_idx;
 
 	ret = i2c_transfer(client->adapter, &xfer[xfer_start_idx], xfer_count);
@@ -289,6 +291,44 @@ static int raydium_i2c_sw_reset(struct i2c_client *client)
 
 	return 0;
 }
+static int raydium_i2c_query_ts_BL_info(struct raydium_data *ts)
+{
+	struct i2c_client *client = ts->client;
+	static const u8 get_hwid[7] = {RM_BOOT_CMD_READHWID,
+					 0x10, 0xc0, 0x01, 0x00, 0x04, 0x00};
+	int error;
+	u8 rbuf[5] = {0, 0, 0, 0, 0};
+	u32 tmpdata = 0;
+
+	error = raydium_i2c_send(client,
+				 RM_CMD_BOOT_WRT, get_hwid, sizeof(get_hwid));
+	if (error) {
+		dev_err(&client->dev, "WRT HWID command failed: %d\n", error);
+		return error;
+	}
+
+	error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, rbuf, 1);
+	if (error) {
+		dev_err(&client->dev, "Ack HWID command failed: %d\n", error);
+		return error;
+	}
+
+	error = raydium_i2c_read(client,
+				 RM_CMD_BOOT_CHK, rbuf, sizeof(rbuf));
+	if (!error) {
+		tmpdata = (rbuf[1]<<24|rbuf[2]<<16|rbuf[3]<<8|rbuf[4]);
+		ts->info.hw_ver = tmpdata;
+		dev_err(&client->dev, "HWID %08X\n", ts->info.hw_ver);
+	} else {
+		ts->info.hw_ver = cpu_to_le32(0xffffffffUL);
+		dev_err(&client->dev, "raydium_i2c_read HWID failed, %X, %X, %X, %X\n",
+					 rbuf[1], rbuf[2], rbuf[3], rbuf[4]);
+	}
+	ts->info.main_ver = 0xff;
+	ts->info.sub_ver = 0xff;
+
+	return error;
+}
 
 static int raydium_i2c_query_ts_info(struct raydium_data *ts)
 {
@@ -388,13 +428,10 @@ static int raydium_i2c_initialize(struct raydium_data *ts)
 	if (error)
 		ts->boot_mode = RAYDIUM_TS_BLDR;
 
-	if (ts->boot_mode == RAYDIUM_TS_BLDR) {
-		ts->info.hw_ver = cpu_to_le32(0xffffffffUL);
-		ts->info.main_ver = 0xff;
-		ts->info.sub_ver = 0xff;
-	} else {
+	if (ts->boot_mode == RAYDIUM_TS_BLDR)
+		raydium_i2c_query_ts_BL_info(ts);
+	else
 		raydium_i2c_query_ts_info(ts);
-	}
 
 	return error;
 }
@@ -1218,7 +1255,7 @@ static SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops,
 			 raydium_i2c_suspend, raydium_i2c_resume);
 
 static const struct i2c_device_id raydium_i2c_id[] = {
-	{ "raydium_i2c" , 0 },
+	{ "raydium_i2c", 0 },
 	{ "rm32380", 0 },
 	{ /* sentinel */ }
 };
-- 
2.25.1