[media] si2157: revert si2157: Si2141/2151 tuner support

'Reset' loop does not look correct. I tested it very many times and
it never repeated those commands. If problem, it tries to solve,
really occurs on some situations better solution should be find out.

There is another patch which does not have such hackish looking loop.
Lets change to it.

Cc: Evgeny Plehov <EvgenyPlehov@ukr.net>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/tuners/si2157.c

 /*
- * Silicon Labs Si2141/2146/2147/2148/2151/2157/2158 silicon tuner driver
+ * Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver
  *
  * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
  *
@@ -75,7 +75,6 @@ static int si2157_cmd_execute(struct i2c_client *client, struct si2157_cmd *cmd)
 	return ret;
 }
 
-#define MAX_RESET_ATTEMPTS 10
 static int si2157_init(struct dvb_frontend *fe)
 {
 	struct i2c_client *client = fe->tuner_priv;
@@ -85,7 +84,7 @@ static int si2157_init(struct dvb_frontend *fe)
 	struct si2157_cmd cmd;
 	const struct firmware *fw;
 	const char *fw_name;
-	unsigned int uitmp, chip_id, i;
+	unsigned int uitmp, chip_id;
 
 	dev_dbg(&client->dev, "\n");
 
@@ -103,44 +102,14 @@ static int si2157_init(struct dvb_frontend *fe)
 	if (uitmp == dev->if_frequency / 1000)
 		goto warm;
 
-	if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
-		for (i = 0; i < MAX_RESET_ATTEMPTS; i++)  {
-			/* reset */
-			memcpy(cmd.args, "\xc0\x05\x00\x00", 4);
-			cmd.wlen = 4;
-			cmd.rlen = 1;
-			ret = si2157_cmd_execute(client, &cmd);
-			if (ret)
-				goto err;
-
-			memcpy(cmd.args, "\xc0\x00\x0d\x0e\x00\x01\x01\x01\x01\x03", 10);
-			cmd.wlen = 10;
-			cmd.rlen = 1;
-			ret = si2157_cmd_execute(client, &cmd);
-			if (ret)
-				goto err;
-			if (cmd.args[0] != 0xfe)
-				break;
-		}
-		if (i >= MAX_RESET_ATTEMPTS)
-			goto err;
-	}
-
 	/* power up */
-	switch (dev->chiptype) {
-	case SI2157_CHIPTYPE_SI2146:
+	if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
 		memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
 		cmd.wlen = 9;
-		break;
-	case SI2157_CHIPTYPE_SI2141:
-		memcpy(cmd.args, "\xc0\x08\x01\x02\x00\x08\x01", 7);
-		cmd.wlen = 7;
-		break;
-	default:
+	} else {
 		memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
 		cmd.wlen = 15;
 	}
-
 	cmd.rlen = 1;
 	ret = si2157_cmd_execute(client, &cmd);
 	if (ret)
@@ -162,8 +131,6 @@ static int si2157_init(struct dvb_frontend *fe)
 	#define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
 	#define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0)
 	#define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0)
-	#define SI2141_A10 ('A' << 24 | 41 << 16 | '1' << 8 | '0' << 0)
-	#define SI2151_A10 ('A' << 24 | 51 << 16 | '1' << 8 | '0' << 0)
 
 	switch (chip_id) {
 	case SI2158_A20:
@@ -175,10 +142,6 @@ static int si2157_init(struct dvb_frontend *fe)
 	case SI2146_A10:
 		fw_name = NULL;
 		break;
-	case SI2141_A10:
-	case SI2151_A10:
-		fw_name = SI2141_A10_FIRMWARE;
-		break;
 	default:
 		dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
 				cmd.args[2], cmd.args[1],
@@ -251,23 +214,6 @@ static int si2157_init(struct dvb_frontend *fe)
 
 	dev_info(&client->dev, "firmware version: %c.%c.%d\n",
 			cmd.args[6], cmd.args[7], cmd.args[8]);
-
-	if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
-		/* set clock */
-		memcpy(cmd.args, "\xc0\x00\x0d", 3);
-		cmd.wlen = 3;
-		cmd.rlen = 1;
-		ret = si2157_cmd_execute(client, &cmd);
-		if (ret)
-			goto err;
-		/* setup PIN */
-		memcpy(cmd.args, "\x12\x80\x80\x85\x00\x81\x00", 7);
-		cmd.wlen = 7;
-		cmd.rlen = 7;
-		ret = si2157_cmd_execute(client, &cmd);
-		if (ret)
-			goto err;
-	}
 warm:
 	/* init statistics in order signal app which are supported */
 	c->strength.len = 1;
@@ -525,8 +471,7 @@ static int si2157_probe(struct i2c_client *client,
 #endif
 
 	dev_info(&client->dev, "Silicon Labs %s successfully attached\n",
-			dev->chiptype == SI2157_CHIPTYPE_SI2141 ?
-			"Si2141/2151" : dev->chiptype == SI2157_CHIPTYPE_SI2146 ?
+			dev->chiptype == SI2157_CHIPTYPE_SI2146 ?
 			"Si2146" : "Si2147/2148/2157/2158");
 
 	return 0;
@@ -563,8 +508,6 @@ static int si2157_remove(struct i2c_client *client)
 static const struct i2c_device_id si2157_id_table[] = {
 	{"si2157", SI2157_CHIPTYPE_SI2157},
 	{"si2146", SI2157_CHIPTYPE_SI2146},
-	{"si2141", SI2157_CHIPTYPE_SI2141},
-	{"si2151", SI2157_CHIPTYPE_SI2141},
 	{}
 };
 MODULE_DEVICE_TABLE(i2c, si2157_id_table);
@@ -581,8 +524,7 @@ static struct i2c_driver si2157_driver = {
 
 module_i2c_driver(si2157_driver);
 
-MODULE_DESCRIPTION("Silicon Labs Si2141/2146/2147/2148/2151/2157/2158 silicon tuner driver");
+MODULE_DESCRIPTION("Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver");
 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 MODULE_LICENSE("GPL");
 MODULE_FIRMWARE(SI2158_A20_FIRMWARE);
-MODULE_FIRMWARE(SI2141_A10_FIRMWARE);

drivers/media/tuners/si2157_priv.h

@@ -42,7 +42,6 @@ struct si2157_dev {
 
 #define SI2157_CHIPTYPE_SI2157 0
 #define SI2157_CHIPTYPE_SI2146 1
-#define SI2157_CHIPTYPE_SI2141 2
 
 /* firmware command struct */
 #define SI2157_ARGLEN      30
@@ -53,6 +52,5 @@ struct si2157_cmd {
 };
 
 #define SI2158_A20_FIRMWARE "dvb-tuner-si2158-a20-01.fw"
-#define SI2141_A10_FIRMWARE "dvb-tuner-si2141-a10-01.fw"
 
 #endif