sibyte: add 3.3 support

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31680 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 367 insertions, 0 deletions

diff --git a/target/linux/sibyte/patches-3.3/103-m41t80_smbus.patch b/target/linux/sibyte/patches-3.3/103-m41t80_smbus.patch
new file mode 100644
index 0000000000..667d07c726
--- /dev/null
+++ b/target/linux/sibyte/patches-3.3/103-m41t80_smbus.patch
@@ -0,0 +1,367 @@
+--- a/drivers/rtc/rtc-m41t80.c
++++ b/drivers/rtc/rtc-m41t80.c
+@@ -6,6 +6,7 @@
+  * Based on m41t00.c by Mark A. Greer <mgreer@mvista.com>
+  *
+  * 2006 (c) mycable GmbH
++ * Copyright (c) 2008  Maciej W. Rozycki
+  *
+  * This program is free software; you can redistribute it and/or modify
+  * it under the terms of the GNU General Public License version 2 as
+@@ -38,6 +39,8 @@
+ #define M41T80_REG_DAY	5
+ #define M41T80_REG_MON	6
+ #define M41T80_REG_YEAR	7
++#define M41T80_REG_CONTROL	8
++#define M41T80_REG_WATCHDOG	9
+ #define M41T80_REG_ALARM_MON	0xa
+ #define M41T80_REG_ALARM_DAY	0xb
+ #define M41T80_REG_ALARM_HOUR	0xc
+@@ -66,7 +69,7 @@
+ #define M41T80_FEATURE_WD	(1 << 3)	/* Extra watchdog resolution */
+ #define M41T80_FEATURE_SQ_ALT	(1 << 4)	/* RSx bits are in reg 4 */
+ 
+-#define DRV_VERSION "0.05"
++#define DRV_VERSION "0.06"
+ 
+ static DEFINE_MUTEX(m41t80_rtc_mutex);
+ static const struct i2c_device_id m41t80_id[] = {
+@@ -89,31 +92,88 @@ struct m41t80_data {
+ 	struct rtc_device *rtc;
+ };
+ 
+-static int m41t80_get_datetime(struct i2c_client *client,
+-			       struct rtc_time *tm)
++
++static int m41t80_write_block_data(struct i2c_client *client,
++				   u8 reg, u8 num, u8 *buf)
+ {
+-	u8 buf[M41T80_DATETIME_REG_SIZE], dt_addr[1] = { M41T80_REG_SEC };
+-	struct i2c_msg msgs[] = {
+-		{
+-			.addr	= client->addr,
+-			.flags	= 0,
+-			.len	= 1,
+-			.buf	= dt_addr,
+-		},
+-		{
+-			.addr	= client->addr,
+-			.flags	= I2C_M_RD,
+-			.len	= M41T80_DATETIME_REG_SIZE - M41T80_REG_SEC,
+-			.buf	= buf + M41T80_REG_SEC,
+-		},
+-	};
++	int i, rc;
+ 
+-	if (i2c_transfer(client->adapter, msgs, 2) < 0) {
+-		dev_err(&client->dev, "read error\n");
+-		return -EIO;
++	if (i2c_check_functionality(client->adapter,
++				    I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)) {
++		i = i2c_smbus_write_i2c_block_data(client, reg, num, buf);
++	} else {
++		for (i = 0; i < num; i++) {
++			rc = i2c_smbus_write_byte_data(client, reg + i,
++						       buf[i]);
++			if (rc < 0) {
++				i = rc;
++				goto out;
++			}
++		}
+ 	}
++out:
++	return i;
++}
++
++static int m41t80_read_block_data(struct i2c_client *client,
++				  u8 reg, u8 num, u8 *buf)
++{
++	int i, rc;
++
++	if (i2c_check_functionality(client->adapter,
++				    I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
++		i = i2c_smbus_read_i2c_block_data(client, reg, num, buf);
++	} else {
++		for (i = 0; i < num; i++) {
++			rc = i2c_smbus_read_byte_data(client, reg + i);
++			if (rc < 0) {
++				i = rc;
++				goto out;
++			}
++			buf[i] = rc;
++		}
++	}
++out:
++	return i;
++}
++
++static int m41t80_get_datetime(struct i2c_client *client, struct rtc_time *tm)
++{
++	u8 buf[M41T80_DATETIME_REG_SIZE];
++	int loops = 2;
++	int sec0, sec1;
++
++	/*
++	 * Time registers are latched by this chip if an I2C block
++	 * transfer is used, but with SMBus-style byte accesses
++	 * this is not the case, so check seconds for a wraparound.
++	 */
++	do {
++		if (m41t80_read_block_data(client, M41T80_REG_SEC,
++					   M41T80_DATETIME_REG_SIZE -
++					   M41T80_REG_SEC,
++					   buf + M41T80_REG_SEC) < 0) {
++			dev_err(&client->dev, "read error\n");
++			return -EIO;
++		}
++		if (i2c_check_functionality(client->adapter,
++					    I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
++			sec1 = buf[M41T80_REG_SEC];
++			break;
++		}
++
++		sec0 = buf[M41T80_REG_SEC];
++		sec1 = i2c_smbus_read_byte_data(client, M41T80_REG_SEC);
++		if (sec1 < 0) {
++			dev_err(&client->dev, "read error\n");
++			return -EIO;
++		}
++
++		sec0 = bcd2bin(sec0 & 0x7f);
++		sec1 = bcd2bin(sec1 & 0x7f);
++	} while (sec1 < sec0 && --loops);
+ 
+-	tm->tm_sec = bcd2bin(buf[M41T80_REG_SEC] & 0x7f);
++	tm->tm_sec = sec1;
+ 	tm->tm_min = bcd2bin(buf[M41T80_REG_MIN] & 0x7f);
+ 	tm->tm_hour = bcd2bin(buf[M41T80_REG_HOUR] & 0x3f);
+ 	tm->tm_mday = bcd2bin(buf[M41T80_REG_DAY] & 0x3f);
+@@ -128,39 +188,16 @@ static int m41t80_get_datetime(struct i2
+ /* Sets the given date and time to the real time clock. */
+ static int m41t80_set_datetime(struct i2c_client *client, struct rtc_time *tm)
+ {
+-	u8 wbuf[1 + M41T80_DATETIME_REG_SIZE];
+-	u8 *buf = &wbuf[1];
+-	u8 dt_addr[1] = { M41T80_REG_SEC };
+-	struct i2c_msg msgs_in[] = {
+-		{
+-			.addr	= client->addr,
+-			.flags	= 0,
+-			.len	= 1,
+-			.buf	= dt_addr,
+-		},
+-		{
+-			.addr	= client->addr,
+-			.flags	= I2C_M_RD,
+-			.len	= M41T80_DATETIME_REG_SIZE - M41T80_REG_SEC,
+-			.buf	= buf + M41T80_REG_SEC,
+-		},
+-	};
+-	struct i2c_msg msgs[] = {
+-		{
+-			.addr	= client->addr,
+-			.flags	= 0,
+-			.len	= 1 + M41T80_DATETIME_REG_SIZE,
+-			.buf	= wbuf,
+-		 },
+-	};
++	u8 buf[M41T80_DATETIME_REG_SIZE];
+ 
+ 	/* Read current reg values into buf[1..7] */
+-	if (i2c_transfer(client->adapter, msgs_in, 2) < 0) {
++	if (m41t80_read_block_data(client, M41T80_REG_SEC,
++				   M41T80_DATETIME_REG_SIZE - M41T80_REG_SEC,
++				   buf + M41T80_REG_SEC) < 0) {
+ 		dev_err(&client->dev, "read error\n");
+ 		return -EIO;
+ 	}
+ 
+-	wbuf[0] = 0; /* offset into rtc's regs */
+ 	/* Merge time-data and register flags into buf[0..7] */
+ 	buf[M41T80_REG_SSEC] = 0;
+ 	buf[M41T80_REG_SEC] =
+@@ -178,7 +215,8 @@ static int m41t80_set_datetime(struct i2
+ 	/* assume 20YY not 19YY */
+ 	buf[M41T80_REG_YEAR] = bin2bcd(tm->tm_year % 100);
+ 
+-	if (i2c_transfer(client->adapter, msgs, 1) != 1) {
++	if (m41t80_write_block_data(client, M41T80_REG_SSEC,
++				    M41T80_DATETIME_REG_SIZE, buf) < 0) {
+ 		dev_err(&client->dev, "write error\n");
+ 		return -EIO;
+ 	}
+@@ -238,34 +276,11 @@ err:
+ static int m41t80_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *t)
+ {
+ 	struct i2c_client *client = to_i2c_client(dev);
+-	u8 wbuf[1 + M41T80_ALARM_REG_SIZE];
+-	u8 *buf = &wbuf[1];
++	u8 buf[M41T80_ALARM_REG_SIZE];
+ 	u8 *reg = buf - M41T80_REG_ALARM_MON;
+-	u8 dt_addr[1] = { M41T80_REG_ALARM_MON };
+-	struct i2c_msg msgs_in[] = {
+-		{
+-			.addr	= client->addr,
+-			.flags	= 0,
+-			.len	= 1,
+-			.buf	= dt_addr,
+-		},
+-		{
+-			.addr	= client->addr,
+-			.flags	= I2C_M_RD,
+-			.len	= M41T80_ALARM_REG_SIZE,
+-			.buf	= buf,
+-		},
+-	};
+-	struct i2c_msg msgs[] = {
+-		{
+-			.addr	= client->addr,
+-			.flags	= 0,
+-			.len	= 1 + M41T80_ALARM_REG_SIZE,
+-			.buf	= wbuf,
+-		 },
+-	};
+ 
+-	if (i2c_transfer(client->adapter, msgs_in, 2) < 0) {
++	if (m41t80_read_block_data(client, M41T80_REG_ALARM_MON,
++				   M41T80_ALARM_REG_SIZE, buf) < 0) {
+ 		dev_err(&client->dev, "read error\n");
+ 		return -EIO;
+ 	}
+@@ -275,7 +290,6 @@ static int m41t80_rtc_set_alarm(struct d
+ 	reg[M41T80_REG_ALARM_MIN] = 0;
+ 	reg[M41T80_REG_ALARM_SEC] = 0;
+ 
+-	wbuf[0] = M41T80_REG_ALARM_MON; /* offset into rtc's regs */
+ 	reg[M41T80_REG_ALARM_SEC] |= t->time.tm_sec >= 0 ?
+ 		bin2bcd(t->time.tm_sec) : 0x80;
+ 	reg[M41T80_REG_ALARM_MIN] |= t->time.tm_min >= 0 ?
+@@ -289,7 +303,8 @@ static int m41t80_rtc_set_alarm(struct d
+ 	else
+ 		reg[M41T80_REG_ALARM_DAY] |= 0x40;
+ 
+-	if (i2c_transfer(client->adapter, msgs, 1) != 1) {
++	if (m41t80_write_block_data(client, M41T80_REG_ALARM_MON,
++				    M41T80_ALARM_REG_SIZE, buf) < 0) {
+ 		dev_err(&client->dev, "write error\n");
+ 		return -EIO;
+ 	}
+@@ -309,24 +324,10 @@ static int m41t80_rtc_read_alarm(struct
+ {
+ 	struct i2c_client *client = to_i2c_client(dev);
+ 	u8 buf[M41T80_ALARM_REG_SIZE + 1]; /* all alarm regs and flags */
+-	u8 dt_addr[1] = { M41T80_REG_ALARM_MON };
+ 	u8 *reg = buf - M41T80_REG_ALARM_MON;
+-	struct i2c_msg msgs[] = {
+-		{
+-			.addr	= client->addr,
+-			.flags	= 0,
+-			.len	= 1,
+-			.buf	= dt_addr,
+-		},
+-		{
+-			.addr	= client->addr,
+-			.flags	= I2C_M_RD,
+-			.len	= M41T80_ALARM_REG_SIZE + 1,
+-			.buf	= buf,
+-		},
+-	};
+ 
+-	if (i2c_transfer(client->adapter, msgs, 2) < 0) {
++	if (m41t80_read_block_data(client, M41T80_REG_ALARM_MON,
++				   M41T80_ALARM_REG_SIZE + 1, buf) < 0) {
+ 		dev_err(&client->dev, "read error\n");
+ 		return -EIO;
+ 	}
+@@ -508,26 +509,16 @@ static int boot_flag;
+  */
+ static void wdt_ping(void)
+ {
+-	unsigned char i2c_data[2];
+-	struct i2c_msg msgs1[1] = {
+-		{
+-			.addr	= save_client->addr,
+-			.flags	= 0,
+-			.len	= 2,
+-			.buf	= i2c_data,
+-		},
+-	};
+-	struct m41t80_data *clientdata = i2c_get_clientdata(save_client);
++	u8 wdt = 0x80;				/* WDS = 1 (0x80)  */
+ 
+-	i2c_data[0] = 0x09;		/* watchdog register */
++	struct m41t80_data *clientdata = i2c_get_clientdata(save_client);
+ 
+ 	if (wdt_margin > 31)
+-		i2c_data[1] = (wdt_margin & 0xFC) | 0x83; /* resolution = 4s */
++		/* mulitplier = WD_TIMO / 4, resolution = 4s (0x3)  */
++		wdt |= (wdt_margin & 0xfc) | 0x3;
+ 	else
+-		/*
+-		 * WDS = 1 (0x80), mulitplier = WD_TIMO, resolution = 1s (0x02)
+-		 */
+-		i2c_data[1] = wdt_margin<<2 | 0x82;
++		/* mulitplier = WD_TIMO, resolution = 1s (0x2)  */
++		wdt |= wdt_margin << 2 | 0x2;
+ 
+ 	/*
+ 	 * M41T65 has three bits for watchdog resolution.  Don't set bit 7, as
+@@ -536,7 +527,7 @@ static void wdt_ping(void)
+ 	if (clientdata->features & M41T80_FEATURE_WD)
+ 		i2c_data[1] &= ~M41T80_WATCHDOG_RB2;
+ 
+-	i2c_transfer(save_client->adapter, msgs1, 1);
++	i2c_smbus_write_byte_data(save_client, M41T80_REG_WATCHDOG, wdt);
+ }
+ 
+ /**
+@@ -546,36 +537,8 @@ static void wdt_ping(void)
+  */
+ static void wdt_disable(void)
+ {
+-	unsigned char i2c_data[2], i2c_buf[0x10];
+-	struct i2c_msg msgs0[2] = {
+-		{
+-			.addr	= save_client->addr,
+-			.flags	= 0,
+-			.len	= 1,
+-			.buf	= i2c_data,
+-		},
+-		{
+-			.addr	= save_client->addr,
+-			.flags	= I2C_M_RD,
+-			.len	= 1,
+-			.buf	= i2c_buf,
+-		},
+-	};
+-	struct i2c_msg msgs1[1] = {
+-		{
+-			.addr	= save_client->addr,
+-			.flags	= 0,
+-			.len	= 2,
+-			.buf	= i2c_data,
+-		},
+-	};
+-
+-	i2c_data[0] = 0x09;
+-	i2c_transfer(save_client->adapter, msgs0, 2);
+-
+-	i2c_data[0] = 0x09;
+-	i2c_data[1] = 0x00;
+-	i2c_transfer(save_client->adapter, msgs1, 1);
++	i2c_smbus_read_byte_data(save_client, M41T80_REG_WATCHDOG);
++	i2c_smbus_write_byte_data(save_client, M41T80_REG_WATCHDOG, 0);
+ }
+ 
+ /**
+@@ -777,8 +740,8 @@ static int m41t80_probe(struct i2c_clien
+ 	struct rtc_time tm;
+ 	struct m41t80_data *clientdata = NULL;
+ 
+-	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C
+-				     | I2C_FUNC_SMBUS_BYTE_DATA)) {
++	if (!i2c_check_functionality(client->adapter,
++				     I2C_FUNC_SMBUS_BYTE_DATA)) {
+ 		rc = -ENODEV;
+ 		goto exit;
+ 	}