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-rw-r--r--packages/linux/nslu2-kernel/2.6.14/30-i2c-x1205.patch622
1 files changed, 622 insertions, 0 deletions
diff --git a/packages/linux/nslu2-kernel/2.6.14/30-i2c-x1205.patch b/packages/linux/nslu2-kernel/2.6.14/30-i2c-x1205.patch
new file mode 100644
index 0000000000..c212238941
--- /dev/null
+++ b/packages/linux/nslu2-kernel/2.6.14/30-i2c-x1205.patch
@@ -0,0 +1,622 @@
+--- linux-2.6.14-rc2/drivers/i2c/chips/Kconfig 2005-09-24 13:17:13.000000000 +0200
++++ test3/drivers/i2c/chips/Kconfig 2005-09-24 16:09:51.000000000 +0200
+@@ -126,4 +126,14 @@
+ This driver can also be built as a module. If so, the module
+ will be called max6875.
+
++config SENSORS_X1205
++ tristate "Xicor X1205 RTC chip"
++ depends on I2C
++ select I2C_SENSOR
++ help
++ If you say yes here you get support for the Xicor X1205 RTC chip.
++
++ This driver can also be built as a module. If so, the module
++ will be called x1205
++
+ endmenu
+--- linux-2.6.14-rc2/drivers/i2c/chips/Makefile 2005-09-17 12:42:33.000000000 +0200
++++ test3/drivers/i2c/chips/Makefile 2005-09-24 16:49:34.000000000 +0200
+@@ -13,6 +13,7 @@
+ obj-$(CONFIG_SENSORS_RTC8564) += rtc8564.o
+ obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o
+ obj-$(CONFIG_TPS65010) += tps65010.o
++obj-$(CONFIG_SENSORS_X1205) += x1205.o
+
+ ifeq ($(CONFIG_I2C_DEBUG_CHIP),y)
+ EXTRA_CFLAGS += -DDEBUG
+diff -urN linux-2.6.14-rc2/drivers/i2c/chips/x1205.c test3/drivers/i2c/chips/x1205.c
+--- linux-2.6.14-rc2/drivers/i2c/chips/x1205.c 1970-01-01 01:00:00.000000000 +0100
++++ test3/drivers/i2c/chips/x1205.c 2005-09-24 16:11:16.000000000 +0200
+@@ -0,0 +1,522 @@
++/*
++ * linux/drivers/i2c/chips/x1205.c
++ *
++ * x1205.c - An 12c driver for the Xicor X1205 RTC
++ * Copyright 2004 Karen Spearel
++ * Copyright 2005 Alessandro Zummo
++ *
++ * please send all reports to:
++ * kas11 at tampabay dot rr dot com
++ * a dot zummo at towertech dot it
++ *
++ * based on the other drivers in this same directory.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ */
++
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/slab.h>
++#include <linux/i2c.h>
++#include <linux/string.h>
++#include <linux/bcd.h>
++#include <linux/rtc.h>
++#include <linux/list.h>
++
++#include <linux/x1205.h>
++
++#define EPOCH_1900 1900
++#define EPOCH_1970 1970
++
++#define DRIVER_VERSION "0.9.5"
++#define DRIVER_NAME (x1205_driver.name)
++
++
++/* Addresses to scan */
++static unsigned short normal_i2c[] = { X1205_I2C_BUS_ADDR, I2C_CLIENT_END };
++
++/* Insmod parameters */
++I2C_CLIENT_INSMOD;
++I2C_CLIENT_MODULE_PARM(hctosys,
++ "Set the system time from the hardware clock upon initialization");
++
++/* Prototypes */
++
++static int x1205_attach(struct i2c_adapter *adapter);
++static int x1205_detach(struct i2c_client *client);
++static int x1205_probe(struct i2c_adapter *adapter, int address, int kind);
++static int x1205_validate_client(struct i2c_client *client);
++
++static int x1205_get_datetime(struct i2c_client *client, struct rtc_time *tm,
++ u8 reg_base);
++static int x1205_set_datetime(struct i2c_client *client, struct rtc_time *tm,
++ int datetoo, u8 reg_base);
++static int x1205_validate_tm(struct rtc_time *tm);
++static int x1205_command(struct i2c_client *client, unsigned int cmd, void *arg);
++static int x1205_hctosys(struct i2c_client *client);
++
++
++static struct i2c_driver x1205_driver = {
++ .owner = THIS_MODULE,
++ .name = "x1205",
++ .flags = I2C_DF_NOTIFY,
++ .attach_adapter = &x1205_attach,
++ .detach_client = &x1205_detach,
++/* .command = &x1205_command,*/
++};
++
++struct x1205_data {
++ struct i2c_client client;
++ struct list_head list;
++ unsigned int epoch;
++};
++
++
++static const unsigned char days_in_mo[] =
++{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
++
++static LIST_HEAD(x1205_clients);
++
++/* Workaround until the I2C subsytem will allow to send
++ * commands to a specific client. This function will send the command
++ * to the first client.
++ */
++
++int x1205_do_command(unsigned int cmd, void *arg)
++{
++ struct list_head *walk;
++ struct list_head *tmp;
++ struct x1205_data *data;
++
++ list_for_each_safe(walk, tmp, &x1205_clients) {
++ data = list_entry(walk, struct x1205_data, list);
++ return x1205_command(&data->client, cmd, arg);
++ }
++
++ return -ENODEV;
++}
++
++
++/*
++ * in the routines that deal directly with the x1205 hardware, we use
++ * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch
++ * Epoch is inited as 2000. Time is set to UT
++ */
++
++static int x1205_get_datetime(struct i2c_client *client, struct rtc_time *tm,
++ u8 reg_base)
++{
++ static unsigned char addr[2] = { 0, };
++ unsigned char buf[8];
++
++ struct i2c_msg msgs[2] = {
++ { client->addr, 0, 2, addr }, /* random read */
++ { client->addr, I2C_M_RD, 8, buf },
++ };
++
++ struct x1205_data *xdata = i2c_get_clientdata(client);
++
++ addr[1] = reg_base;
++
++ if ((i2c_transfer(client->adapter, msgs, 2)) == 2) {
++ /* did we read 2 messages? */
++
++ dev_dbg(&client->dev,
++ "%s: raw read data - sec-%02x min-%02x hr-%02x"
++ " mday-%02x mon-%02x year-%02x wday-%02x y2k-%02x\n",
++ __FUNCTION__,
++ buf[0], buf[1], buf[2], buf[3],
++ buf[4], buf[5], buf[6], buf[7]);
++
++ tm->tm_sec = BCD2BIN(buf[CCR_SEC]);
++ tm->tm_min = BCD2BIN(buf[CCR_MIN]);
++ buf[CCR_HOUR] &= ~X1205_HR_MIL;
++ tm->tm_hour = BCD2BIN(buf[CCR_HOUR]); /* hr is 0-23 */
++ tm->tm_mday = BCD2BIN(buf[CCR_MDAY]);
++ tm->tm_mon = BCD2BIN(buf[CCR_MONTH]);
++ xdata->epoch = BCD2BIN(buf[CCR_Y2K]) * 100;
++ tm->tm_year = BCD2BIN(buf[CCR_YEAR]) + xdata->epoch - EPOCH_1900;
++ tm->tm_wday = buf[CCR_WDAY];
++
++ dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
++ "mday=%d, mon=%d, year=%d, wday=%d\n",
++ __FUNCTION__,
++ tm->tm_sec, tm->tm_min, tm->tm_hour,
++ tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
++
++ } else {
++ dev_dbg(&client->dev, "%s: read error\n", __FUNCTION__);
++ return -EIO;
++ }
++
++ return 0;
++}
++
++
++static int x1205_set_datetime(struct i2c_client *client, struct rtc_time *tm,
++ int datetoo, u8 reg_base)
++{
++ int i, err, xfer;
++
++ static unsigned char wel[3] = { 0, X1205_REG_SR,
++ X1205_SR_WEL };
++
++
++ static unsigned char rwel[3] = { 0, X1205_REG_SR,
++ X1205_SR_WEL | X1205_SR_RWEL };
++
++ static unsigned char diswe[3] = { 0, X1205_REG_SR, 0 };
++
++ static unsigned char data[3] = { 0, };
++ static unsigned char buf[8];
++
++ struct x1205_data *xdata = i2c_get_clientdata(client);
++
++ if ((err = x1205_validate_tm(tm)) < 0)
++ return err;
++
++ dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d, "
++ "mday=%d, mon=%d, year=%d, wday=%d\n",
++ __FUNCTION__,
++ tm->tm_sec, tm->tm_min, tm->tm_hour,
++ tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
++
++
++ buf[CCR_SEC] = BIN2BCD(tm->tm_sec);
++ buf[CCR_MIN] = BIN2BCD(tm->tm_min);
++
++ /* Set 24HR format */
++ buf[CCR_HOUR] = BIN2BCD(tm->tm_hour) | X1205_HR_MIL;
++
++ if (datetoo == X1205_DATETOO) {
++ buf[CCR_MDAY] = BIN2BCD(tm->tm_mday);
++
++ /* month, 0 - 11 */
++ buf[CCR_MONTH] = BIN2BCD(tm->tm_mon); /* input is 0-11 */
++
++ /* year, since 1900 */
++ buf[CCR_YEAR] = BIN2BCD((tm->tm_year + EPOCH_1900 - xdata->epoch));
++ buf[CCR_WDAY] = tm->tm_wday & 7;
++ buf[CCR_Y2K] = BIN2BCD(xdata->epoch / 100);
++ }
++
++ xfer = i2c_master_send(client, wel, 3);
++ dev_dbg(&client->dev, "%s: wen - %x\n", __FUNCTION__, xfer);
++ if (xfer != 3)
++ return -EIO;
++
++ xfer = i2c_master_send(client, rwel, 3);
++ dev_dbg(&client->dev, "%s: wenb - %x\n", __FUNCTION__, xfer);
++ if (xfer != 3)
++ return -EIO;
++
++ for (i = 0; i < 8; i++) {
++ data[1] = i + reg_base;
++ data[2] = buf[i];
++ xfer = i2c_master_send(client, data, 3);
++
++ dev_dbg(&client->dev, "%s: xfer %d addr, %02x, data %02x\n",
++ __FUNCTION__,
++ xfer, data[1], data[2]);
++
++ if (xfer != 3)
++ return -EIO;
++ };
++
++ xfer = i2c_master_send(client, diswe, 3);
++ dev_dbg(&client->dev, "%s: wdis - %x\n", __FUNCTION__, xfer);
++ if (xfer != 3)
++ return -EIO;
++
++ return 0;
++}
++
++static int x1205_hctosys(struct i2c_client *client)
++{
++ int err;
++
++ struct rtc_time tm;
++ struct timespec tv;
++
++
++ err = x1205_command(client, X1205_CMD_GETDATETIME, &tm);
++
++ if (err)
++ {
++ dev_info(&client->adapter->dev,
++ "%s: Unable to set the system clock\n",
++ DRIVER_NAME);
++
++ return err;
++
++ }
++
++ /* IMPORTANT: the RTC only stores whole seconds. It is arbitrary whether
++ * it stores the most close value or the value with partial seconds
++ * truncated, however it is important for x1205_sync_rtc that it be
++ * defined to store the truncated value. This is because otherwise it
++ * is necessary to read both xtime.tv_sec and xtime.tv_nsec in the
++ * sync function, and atomic reads of >32bits on ARM are not possible.
++ * So storing the most close value would slow down the sync API. So
++ * Here we have the truncated value and the best guess is to add 0.5s
++ */
++
++ tv.tv_nsec = NSEC_PER_SEC >> 1;
++
++ /* WARNING: this is not the C library 'mktime' call, it is a built in
++ * inline function from include/linux/time.h. It expects (requires)
++ * the month to be in the range 1-12
++ */
++
++ tv.tv_sec = mktime(tm.tm_year + EPOCH_1900, tm.tm_mon + 1,
++ tm.tm_mday, tm.tm_hour,
++ tm.tm_min, tm.tm_sec);
++
++ do_settimeofday(&tv);
++
++ dev_info(&client->adapter->dev,
++ "%s: Setting the system clock to %d-%d-%d %d:%d:%d\n",
++ DRIVER_NAME,
++ tm.tm_year + EPOCH_1900, tm.tm_mon + 1,
++ tm.tm_mday, tm.tm_hour, tm.tm_min,
++ tm.tm_sec);
++
++ return 0;
++}
++
++static int x1205_validate_client(struct i2c_client *client)
++{
++ int i, xfer;
++
++ /* Probe array. We will read the register at the specified
++ * address and check if the given bits are zero.
++ */
++
++ const unsigned char probe_pattern[] = {
++
++ X1205_REG_SR, 0x18,
++ X1205_REG_Y2K, 0xC6,
++ X1205_REG_DW, 0xF8,
++ X1205_REG_MO, 0xE0,
++ X1205_REG_DT, 0xC0,
++ X1205_REG_HR, 0x40,
++ X1205_REG_MN, 0x80,
++ X1205_REG_SC, 0x80,
++ X1205_REG_DTR, 0xF8,
++ X1205_REG_ATR, 0x18,
++ X1205_REG_INT, 0x18,
++ X1205_REG_0, 0xFF,
++ X1205_REG_Y2K1, 0xC6,
++ X1205_REG_DWA1, 0x78,
++ X1205_REG_MOA1, 0x60,
++ X1205_REG_DTA1, 0x40,
++ X1205_REG_HRA1, 0x40,
++ X1205_REG_Y2K0, 0xC6,
++ X1205_REG_DWA0, 0x78,
++ X1205_REG_MOA0, 0x60,
++ X1205_REG_DTA0, 0x40,
++ X1205_REG_HRA0, 0x40,
++ };
++
++ for (i = 0; i < sizeof(probe_pattern); i += 2)
++ {
++ unsigned char buf;
++
++ static unsigned char addr[2];
++
++ struct i2c_msg msgs[2] = {
++ { client->addr, 0, 2, addr }, /* random read */
++ { client->addr, I2C_M_RD, 1, &buf },
++ };
++
++ addr[0] = 0x00;
++ addr[1] = probe_pattern[i];
++
++ xfer = i2c_transfer(client->adapter, msgs, 2);
++
++ if (xfer != 2) {
++ dev_dbg(&client->adapter->dev,
++ "%s: could not read register %x\n",
++ __FUNCTION__, addr[1]);
++
++ return -EIO;
++ }
++
++ if ((buf & probe_pattern[i+1]) != 0) {
++ dev_dbg(&client->adapter->dev,
++ "%s: register %x, pattern %d: %x\n",
++ __FUNCTION__, addr[1], i, buf);
++
++ return -ENODEV;
++ }
++ }
++
++ return 0;
++}
++
++static int x1205_attach(struct i2c_adapter *adapter)
++{
++ dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
++
++ return i2c_probe(adapter, &addr_data, x1205_probe);
++}
++
++static int x1205_probe(struct i2c_adapter *adapter, int address, int kind)
++{
++ struct i2c_client *new_client;
++ struct x1205_data *xdata;
++
++ int err = 0;
++
++ dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
++
++ if (!(xdata = kmalloc(sizeof(struct x1205_data), GFP_KERNEL))) {
++ err = -ENOMEM;
++ goto exit;
++ }
++
++ /* Fill our data structure */
++
++ memset(xdata, 0, sizeof(struct x1205_data));
++
++ xdata->epoch = 2000;
++
++
++ /* Prepare i2c_client structure */
++
++ new_client = &xdata->client;
++ i2c_set_clientdata(new_client, xdata);
++ new_client->addr = address;
++ new_client->adapter = adapter;
++ new_client->driver = &x1205_driver;
++ new_client->flags = 0;
++
++ strlcpy(new_client->name, "x1205", I2C_NAME_SIZE);
++
++
++ /* Verify the chip is really an X1205 */
++
++ if (kind < 0)
++ {
++ if (x1205_validate_client(new_client) < 0) {
++ err = -ENODEV;
++ goto exit_kfree;
++ }
++ }
++
++ /* Inform the i2c layer */
++ if ((err = i2c_attach_client(new_client)))
++ goto exit_kfree;
++
++ list_add(&xdata->list, &x1205_clients);
++
++ dev_info(&adapter->dev, "%s: chip found, driver " DRIVER_VERSION "\n",
++ DRIVER_NAME);
++
++ /* If requested, se the system time */
++ if (hctosys)
++ x1205_hctosys(new_client);
++
++ return 0;
++
++exit_kfree:
++ kfree(xdata);
++
++exit:
++ return err;
++}
++
++static int x1205_detach(struct i2c_client *client)
++{
++ int err;
++ struct x1205_data *data = i2c_get_clientdata(client);
++
++ dev_dbg(&client->dev, "%s\n", __FUNCTION__);
++
++ if ((err = i2c_detach_client(client)))
++ return err;
++
++ list_del(&data->list);
++ kfree(data);
++ return 0;
++}
++
++/* make sure the rtc_time values are in bounds */
++static int x1205_validate_tm(struct rtc_time *tm)
++{
++ tm->tm_year += 1900;
++
++ if (tm->tm_year < EPOCH_1970)
++ return -EINVAL;
++
++ if ((tm->tm_mon > 11) || (tm->tm_mday == 0))
++ return -EINVAL;
++
++ if (tm->tm_mday > (days_in_mo[tm->tm_mon] + ( (tm->tm_mon == 1) &&
++ ((!(tm->tm_year % 4) && (tm->tm_year % 100) ) || !(tm->tm_year % 400)))))
++ return -EINVAL;
++
++ if ((tm->tm_year -= EPOCH_1900) > 255)
++ return -EINVAL;
++
++ if ((tm->tm_hour >= 24) || (tm->tm_min >= 60) || (tm->tm_sec >= 60))
++ return -EINVAL;
++
++ return 0;
++}
++
++static int x1205_command(struct i2c_client *client, unsigned int cmd, void *tm)
++{
++ if (client == NULL || tm == NULL)
++ return -EINVAL;
++
++ if (!capable(CAP_SYS_TIME))
++ return -EACCES;
++
++ dev_dbg(&client->dev, "%s: cmd=%d\n", __FUNCTION__, cmd);
++
++ switch (cmd) {
++ case X1205_CMD_GETDATETIME:
++ return x1205_get_datetime(client, tm, X1205_CCR_BASE);
++
++ case X1205_CMD_SETTIME:
++ return x1205_set_datetime(client, tm, X1205_NODATE, X1205_CCR_BASE);
++
++ case X1205_CMD_SETDATETIME:
++ return x1205_set_datetime(client, tm, X1205_DATETOO, X1205_CCR_BASE);
++
++ case X1205_CMD_GETALARM:
++ return x1205_get_datetime(client, tm, X1205_ALM0_BASE);
++
++ case X1205_CMD_SETALARM:
++ return x1205_set_datetime(client, tm, X1205_DATETOO, X1205_ALM0_BASE);
++
++ default:
++ return -EINVAL;
++ }
++}
++
++
++static int __init x1205_init(void)
++{
++ return i2c_add_driver(&x1205_driver);
++}
++
++static void __exit x1205_exit(void)
++{
++ i2c_del_driver(&x1205_driver);
++}
++
++MODULE_AUTHOR(
++ "Karen Spearel <kas11@tampabay.rr.com>, "
++ "Alessandro Zummo <a.zummo@towertech.it>");
++MODULE_DESCRIPTION("Xicor X1205 RTC driver");
++MODULE_LICENSE("GPL");
++
++EXPORT_SYMBOL_GPL(x1205_do_command);
++
++module_init(x1205_init);
++module_exit(x1205_exit);
+--- linux-2.6.14-rc2/include/linux/x1205.h 1970-01-01 01:00:00.000000000 +0100
++++ test3/include/linux/x1205.h 2005-09-24 16:59:28.000000000 +0200
+@@ -0,0 +1,66 @@
++
++/* commands */
++
++#define X1205_CMD_GETDATETIME 0
++#define X1205_CMD_SETTIME 1
++#define X1205_CMD_SETDATETIME 2
++#define X1205_CMD_GETALARM 3
++#define X1205_CMD_SETALARM 4
++
++/* flags */
++
++#define X1205_NODATE 0
++#define X1205_DATETOO 1
++
++/* offsets into read buf - add 2 for write buf */
++
++#define CCR_SEC 0
++#define CCR_MIN 1
++#define CCR_HOUR 2
++#define CCR_MDAY 3
++#define CCR_MONTH 4
++#define CCR_YEAR 5
++#define CCR_WDAY 6
++#define CCR_Y2K 7
++
++#define X1205_REG_SR 0x3F /* status register */
++#define X1205_REG_Y2K 0x37
++#define X1205_REG_DW 0x36
++#define X1205_REG_YR 0x35
++#define X1205_REG_MO 0x34
++#define X1205_REG_DT 0x33
++#define X1205_REG_HR 0x32
++#define X1205_REG_MN 0x31
++#define X1205_REG_SC 0x30
++#define X1205_REG_DTR 0x13
++#define X1205_REG_ATR 0x12
++#define X1205_REG_INT 0x11
++#define X1205_REG_0 0x10
++#define X1205_REG_Y2K1 0x0F
++#define X1205_REG_DWA1 0x0E
++#define X1205_REG_YRA1 0x0D
++#define X1205_REG_MOA1 0x0C
++#define X1205_REG_DTA1 0x0B
++#define X1205_REG_HRA1 0x0A
++#define X1205_REG_MNA1 0x09
++#define X1205_REG_SCA1 0x08
++#define X1205_REG_Y2K0 0x07
++#define X1205_REG_DWA0 0x06
++#define X1205_REG_YRA0 0x05
++#define X1205_REG_MOA0 0x04
++#define X1205_REG_DTA0 0x03
++#define X1205_REG_HRA0 0x02
++#define X1205_REG_MNA0 0x01
++#define X1205_REG_SCA0 0x00
++
++#define X1205_I2C_BUS_ADDR 0x6f /* hardwired into x1205 */
++#define X1205_CCR_BASE 0x30 /* Base address of CCR */
++#define X1205_ALM0_BASE 0x00 /* Base address of ALARM0 */
++
++#define X1205_SR_WEL 0x02 /* Write Enable Latch bit */
++#define X1205_SR_RWEL 0x04 /* Register Write Enable Bit */
++
++#define X1205_HR_MIL 0x80 /* set in ccr.hour for 24 hr mode */
++
++extern int x1205_do_command(unsigned int cmd, void *arg);
++
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