X-Git-Url: http://git.openwrt.org/?a=blobdiff_plain;f=target%2Flinux%2Fsibyte%2Fpatches%2F103-m41t80_smbus.patch;fp=target%2Flinux%2Fsibyte%2Fpatches%2F103-m41t80_smbus.patch;h=c6a07c6d5b03f4eda48a528da07867b1f5f58e76;hb=b175a89b031ea5a4a2a39aa447e2ae96a2a4c093;hp=0000000000000000000000000000000000000000;hpb=0cfe46cd9f4aebc40fccee1d652d5eb1928dbe75;p=openwrt%2Fsvn-archive%2Farchive.git diff --git a/target/linux/sibyte/patches/103-m41t80_smbus.patch b/target/linux/sibyte/patches/103-m41t80_smbus.patch new file mode 100644 index 0000000000..c6a07c6d5b --- /dev/null +++ b/target/linux/sibyte/patches/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 + * + * 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 const struct i2c_device_id m41t80_id[] = { + { "m41t62", M41T80_FEATURE_SQ | M41T80_FEATURE_SQ_ALT }, +@@ -88,31 +91,88 @@ 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); +@@ -127,39 +187,16 @@ 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] = +@@ -177,7 +214,8 @@ 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; + } +@@ -251,34 +289,11 @@ 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; + } +@@ -288,7 +303,6 @@ 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 ? +@@ -302,7 +316,8 @@ 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; + } +@@ -322,24 +337,10 @@ 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; + } +@@ -512,26 +513,16 @@ 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 +@@ -540,7 +531,7 @@ 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); + } + + /** +@@ -550,36 +541,8 @@ 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); + } + + /** +@@ -772,8 +735,8 @@ 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; + }