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-rw-r--r--packages/linux/ixp4xx-kernel/2.6.15/60-nas100d-i2c.patch531
1 files changed, 531 insertions, 0 deletions
diff --git a/packages/linux/ixp4xx-kernel/2.6.15/60-nas100d-i2c.patch b/packages/linux/ixp4xx-kernel/2.6.15/60-nas100d-i2c.patch
new file mode 100644
index 0000000000..5dfed57c0e
--- /dev/null
+++ b/packages/linux/ixp4xx-kernel/2.6.15/60-nas100d-i2c.patch
@@ -0,0 +1,531 @@
+ drivers/i2c/chips/Kconfig | 9
+ drivers/i2c/chips/Makefile | 1
+ drivers/i2c/chips/pcf8563.c | 466 ++++++++++++++++++++++++++++++++++++++++++++
+ include/linux/pcf8563.h | 27 ++
+ 4 files changed, 503 insertions(+)
+
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-nas100d/drivers/i2c/chips/pcf8563.c 2005-11-22 17:32:35.000000000 +0100
+@@ -0,0 +1,466 @@
++/*
++ * pcf8563.c - An i2c driver for the Philips PCF8563 RTC
++ * Copyright 2005 Tower Technologies
++ *
++ * Author: Alessandro Zummo <a.zummo@towertech.it>
++ * Maintainers: http://www.nslu2-linux.org/
++ *
++ * based on the other drivers in this same directory.
++ *
++ * http://www.semiconductors.philips.com/acrobat/datasheets/PCF8563-04.pdf
++ *
++ * 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/pcf8563.h>
++
++#define DRV_VERSION "0.3.4"
++
++/* Addresses to scan */
++static unsigned short normal_i2c[] = { 0x51, I2C_CLIENT_END };
++
++/* Module parameters */
++I2C_CLIENT_INSMOD;
++I2C_CLIENT_MODULE_PARM(hctosys,
++ "Set the system time from the hardware clock upon initialization");
++
++#define PCF8563_REG_ST1 0x00 /* status */
++#define PCF8563_REG_ST2 0x01
++
++#define PCF8563_REG_SC 0x02 /* datetime */
++#define PCF8563_REG_MN 0x03
++#define PCF8563_REG_HR 0x04
++#define PCF8563_REG_DM 0x05
++#define PCF8563_REG_DW 0x06
++#define PCF8563_REG_MO 0x07
++#define PCF8563_REG_YR 0x08
++
++#define PCF8563_REG_AMN 0x09 /* alarm */
++#define PCF8563_REG_AHR 0x0A
++#define PCF8563_REG_ADM 0x0B
++#define PCF8563_REG_ADW 0x0C
++
++#define PCF8563_REG_CLKO 0x0D /* clock out */
++#define PCF8563_REG_TMRC 0x0E /* timer control */
++#define PCF8563_REG_TMR 0x0F /* timer */
++
++#define PCF8563_SC_LV 0x80 /* low voltage */
++#define PCF8563_MO_C 0x80 /* century */
++
++/* Prototypes */
++static int pcf8563_attach(struct i2c_adapter *adapter);
++static int pcf8563_detach(struct i2c_client *client);
++static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind);
++static int pcf8563_command(struct i2c_client *client, unsigned int cmd,
++ void *arg);
++
++static struct i2c_driver pcf8563_driver = {
++ .owner = THIS_MODULE,
++ .name = "pcf8563",
++ .flags = I2C_DF_NOTIFY,
++ .attach_adapter = &pcf8563_attach,
++ .detach_client = &pcf8563_detach,
++};
++
++struct pcf8563_data {
++ struct i2c_client client;
++ struct list_head list;
++};
++
++static const unsigned char days_in_mo[] =
++ { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
++
++static LIST_HEAD(pcf8563_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 pcf8563_do_command(unsigned int cmd, void *arg)
++{
++ struct list_head *walk;
++ struct list_head *tmp;
++ struct pcf8563_data *data;
++
++ list_for_each_safe(walk, tmp, &pcf8563_clients) {
++ data = list_entry(walk, struct pcf8563_data, list);
++ return pcf8563_command(&data->client, cmd, arg);
++ }
++
++ return -ENODEV;
++}
++
++#define is_leap(year) \
++ ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
++
++/* make sure the rtc_time values are in bounds */
++
++static int pcf8563_validate_tm(struct rtc_time *tm)
++{
++ int year = tm->tm_year + 1900;
++
++ if ((tm->tm_year < 70) || (tm->tm_year > 255))
++ 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) && is_leap(year)))
++ return -EINVAL;
++
++ if ((tm->tm_hour >= 24) || (tm->tm_min >= 60) || (tm->tm_sec >= 60))
++ return -EINVAL;
++
++ return 0;
++}
++
++/*
++ * In the routines that deal directly with the pcf8563 hardware, we use
++ * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
++ */
++static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm)
++{
++ unsigned char buf[13];
++ unsigned char addr = PCF8563_REG_ST1;
++
++ struct i2c_msg msgs[] = {
++ { client->addr, 0, 1, &addr }, /* setup read ptr */
++ { client->addr, I2C_M_RD, 13, buf }, /* read status + date */
++ };
++
++ /* read registers */
++ if ((i2c_transfer(client->adapter, msgs, 2)) != 2) {
++ dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
++ return -EIO;
++ }
++
++ if (buf[PCF8563_REG_SC] & PCF8563_SC_LV)
++ dev_info(&client->dev,
++ "low voltage detected, date/time is not reliable.\n");
++
++ dev_dbg(&client->dev,
++ "%s: raw data is st1=%02x, st2=%02x, sec=%02x, min=%02x, hr=%02x, "
++ "mday=%02x, wday=%02x, mon=%02x, year=%02x\n",
++ __FUNCTION__,
++ buf[0], buf[1], buf[2], buf[3],
++ buf[4], buf[5], buf[6], buf[7],
++ buf[8]);
++
++
++ tm->tm_sec = BCD2BIN(buf[PCF8563_REG_SC] & 0x7F);
++ tm->tm_min = BCD2BIN(buf[PCF8563_REG_MN] & 0x7F);
++ tm->tm_hour = BCD2BIN(buf[PCF8563_REG_HR] & 0x3F); /* rtc hr 0-23 */
++ tm->tm_mday = BCD2BIN(buf[PCF8563_REG_DM] & 0x3F);
++ tm->tm_wday = buf[PCF8563_REG_DW] & 0x07;
++ tm->tm_mon = BCD2BIN(buf[PCF8563_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */
++ tm->tm_year = BCD2BIN(buf[PCF8563_REG_YR])
++ + (buf[PCF8563_REG_MO] & PCF8563_MO_C ? 100 : 0);
++
++ 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);
++
++ if (pcf8563_validate_tm(tm) < 0) {
++ dev_err(&client->dev, "retrieved date/time is not valid.\n");
++ return -EINVAL;
++ }
++
++ return 0;
++}
++
++static int pcf8563_set_datetime(struct i2c_client *client, struct rtc_time *tm,
++ int datetoo)
++{
++ int i, err;
++ unsigned char buf[9];
++
++ /* check if all values in the tm struct are correct */
++ if ((err = pcf8563_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);
++
++ /* hours, minutes and seconds */
++ buf[PCF8563_REG_SC] = BIN2BCD(tm->tm_sec);
++ buf[PCF8563_REG_MN] = BIN2BCD(tm->tm_min);
++ buf[PCF8563_REG_HR] = BIN2BCD(tm->tm_hour);
++
++ /* should we also set the date? */
++ if (datetoo) {
++ buf[PCF8563_REG_DM] = BIN2BCD(tm->tm_mday);
++
++ /* month, 1 - 12 */
++ buf[PCF8563_REG_MO] = BIN2BCD(tm->tm_mon + 1);
++
++ /* year and century */
++ buf[PCF8563_REG_YR] = BIN2BCD(tm->tm_year % 100);
++ if (tm->tm_year / 100)
++ buf[PCF8563_REG_MO] |= PCF8563_MO_C;
++
++ buf[PCF8563_REG_DW] = tm->tm_wday & 0x07;
++ }
++
++ /* write register's data */
++ for (i = 0; i < (datetoo ? 7 : 3); i++) {
++ unsigned char data[2] = { PCF8563_REG_SC + i,
++ buf[PCF8563_REG_SC + i] };
++
++ err = i2c_master_send(client, data, sizeof(data));
++ if (err != sizeof(data)) {
++ dev_err(&client->dev,
++ "%s: err=%d addr=%02x, data=%02x\n",
++ __FUNCTION__, err, data[0], data[1]);
++ return -EIO;
++ }
++ };
++
++ return 0;
++}
++
++static int pcf8563_hctosys(struct i2c_client *client)
++{
++ int err;
++
++ struct rtc_time tm;
++ struct timespec tv;
++
++ err = pcf8563_command(client, PCF8563_CMD_GETDATETIME, &tm);
++
++ if (err) {
++ dev_err(&client->dev,
++ "Unable to set the system clock\n");
++ 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 that we use it to store
++ * the truncated value. This is because otherwise it is necessary,
++ * in an rtc sync function, to read both xtime.tv_sec and
++ * xtime.tv_nsec. On some processors (i.e. ARM), an atomic read
++ * of >32bits is 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 + 1900, tm.tm_mon + 1,
++ tm.tm_mday, tm.tm_hour,
++ tm.tm_min, tm.tm_sec);
++
++ do_settimeofday(&tv);
++
++ dev_info(&client->dev,
++ "setting the system clock to %d-%d-%d %d:%d:%d\n",
++ tm.tm_year + 1900, tm.tm_mon + 1,
++ tm.tm_mday, tm.tm_hour, tm.tm_min,
++ tm.tm_sec);
++
++ return 0;
++}
++
++struct pcf8563_limit
++{
++ unsigned char reg;
++ unsigned char mask;
++ unsigned char min;
++ unsigned char max;
++};
++
++static int pcf8563_validate_client(struct i2c_client *client)
++{
++ int i, xfer;
++
++ static const struct pcf8563_limit probe_limits_pattern[] = {
++ /* register, mask, min, max */
++ { PCF8563_REG_SC, 0x7F, 0, 59 },
++ { PCF8563_REG_MN, 0x7F, 0, 59 },
++ { PCF8563_REG_HR, 0x3F, 0, 23 },
++ { PCF8563_REG_DM, 0x3F, 0, 31 },
++ { PCF8563_REG_MO, 0x1F, 0, 12 },
++ { PCF8563_REG_YR, 0xFF, 0, 99 },
++ };
++
++ /* check limits (only registers with bcd values) */
++ for (i = 0; i < ARRAY_SIZE(probe_limits_pattern); i++) {
++ unsigned char addr, buf, value;
++
++ addr = probe_limits_pattern[i].reg;
++
++ struct i2c_msg msgs[2] = {
++ { client->addr, 0, 2, &addr },
++ { client->addr, I2C_M_RD, 1, &buf },
++ };
++
++ xfer = i2c_transfer(client->adapter, msgs, 2);
++
++ if (xfer != 2) {
++ dev_err(&client->adapter->dev,
++ "%s: could not read register %x\n",
++ __FUNCTION__, probe_limits_pattern[i].reg);
++
++ return -EIO;
++ }
++
++ value = BCD2BIN(buf & probe_limits_pattern[i].mask);
++
++ if (value > probe_limits_pattern[i].max ||
++ value < probe_limits_pattern[i].min) {
++ dev_dbg(&client->adapter->dev,
++ "%s: register=%x, lim pattern=%d, value=%d\n",
++ __FUNCTION__, probe_limits_pattern[i].reg, i, value);
++
++ return -ENODEV;
++ }
++ }
++
++ return 0;
++}
++
++static int pcf8563_attach(struct i2c_adapter *adapter)
++{
++ return i2c_probe(adapter, &addr_data, pcf8563_probe);
++}
++
++static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind)
++{
++ struct i2c_client *client;
++ struct pcf8563_data *data;
++
++ int err = 0;
++
++ dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
++
++ if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
++ err = -ENODEV;
++ goto exit;
++ }
++
++ if (!(data = kzalloc(sizeof(struct pcf8563_data), GFP_KERNEL))) {
++ err = -ENOMEM;
++ goto exit;
++ }
++
++ client = &data->client;
++ client->addr = address;
++ client->driver = &pcf8563_driver;
++ client->adapter = adapter;
++
++ strlcpy(client->name, pcf8563_driver.name, I2C_NAME_SIZE);
++
++ i2c_set_clientdata(client, data);
++
++ /* Verify the chip is really an PCF8563 */
++ if (kind < 0) {
++ if (pcf8563_validate_client(client) < 0) {
++ err = -ENODEV;
++ goto exit_kfree;
++ }
++ }
++
++ /* Inform the i2c layer */
++ if ((err = i2c_attach_client(client)))
++ goto exit_kfree;
++
++ list_add(&data->list, &pcf8563_clients);
++
++ dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
++
++ /* If requested, set the system time */
++ if (hctosys)
++ pcf8563_hctosys(client);
++
++ return 0;
++
++exit_kfree:
++ kfree(data);
++
++exit:
++ return err;
++}
++
++static int pcf8563_detach(struct i2c_client *client)
++{
++ int err;
++ struct pcf8563_data *data = i2c_get_clientdata(client);
++
++ if ((err = i2c_detach_client(client)))
++ return err;
++
++ list_del(&data->list);
++
++ kfree(data);
++
++ return 0;
++}
++
++static int pcf8563_command(struct i2c_client *client, unsigned int cmd,
++ void *param)
++{
++ if (param == NULL)
++ return -EINVAL;
++
++ if (!capable(CAP_SYS_TIME))
++ return -EACCES;
++
++ dev_dbg(&client->dev, "%s: cmd=%d\n", __FUNCTION__, cmd);
++
++ switch (cmd) {
++ case PCF8563_CMD_GETDATETIME:
++ return pcf8563_get_datetime(client, param);
++
++ case PCF8563_CMD_SETTIME:
++ return pcf8563_set_datetime(client, param, 0);
++
++ case PCF8563_CMD_SETDATETIME:
++ return pcf8563_set_datetime(client, param, 1);
++
++ default:
++ return -EINVAL;
++ }
++}
++
++static int __init pcf8563_init(void)
++{
++ return i2c_add_driver(&pcf8563_driver);
++}
++
++static void __exit pcf8563_exit(void)
++{
++ i2c_del_driver(&pcf8563_driver);
++}
++
++MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
++MODULE_DESCRIPTION("Philips PCF8563 RTC driver");
++MODULE_LICENSE("GPL");
++MODULE_VERSION(DRV_VERSION);
++
++EXPORT_SYMBOL_GPL(pcf8563_do_command);
++
++module_init(pcf8563_init);
++module_exit(pcf8563_exit);
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-nas100d/include/linux/pcf8563.h 2005-11-22 01:36:46.000000000 +0100
+@@ -0,0 +1,27 @@
++/*
++ * pcf8563.h - defines for drivers/i2c/chips/pcf8563.c
++ * Copyright 2005 Tower Technologies
++ *
++ * Author: Alessandro Zummo <a.zummo@towertech.it>
++ * Maintainers: http://www.nslu2-linux.org/
++ *
++ * 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.
++ */
++
++#ifndef __LINUX_PCF8563_H__
++#define __LINUX_PCF8563_H__
++
++/* commands */
++
++#define PCF8563_CMD_GETDATETIME 0
++#define PCF8563_CMD_SETTIME 1
++#define PCF8563_CMD_SETDATETIME 2
++#define PCF8563_CMD_GETALARM 3
++#define PCF8563_CMD_SETALARM 4
++
++extern int pcf8563_do_command(unsigned int cmd, void *arg);
++
++#endif /* __LINUX_PCF8563_H__ */
+--- linux-nas100d.orig/drivers/i2c/chips/Kconfig 2005-11-21 22:01:31.000000000 +0100
++++ linux-nas100d/drivers/i2c/chips/Kconfig 2005-11-22 01:36:46.000000000 +0100
+@@ -135,4 +135,13 @@ config RTC_X1205_I2C
+ This driver can also be built as a module. If so, the module
+ will be called x1205.
+
++config RTC_PCF8563_I2C
++ tristate "Philips PCF8563 RTC"
++ depends on I2C && EXPERIMENTAL
++ help
++ If you say yes here you get support for the Philips PCF8563
++ Real Time Clock chip. This chip is used by the Iomega NAS100D.
++
++ This driver can also be built as a module. If so, the module
++ will be called pcf8563.
+ endmenu
+--- linux-nas100d.orig/drivers/i2c/chips/Makefile 2005-11-21 22:01:31.000000000 +0100
++++ linux-nas100d/drivers/i2c/chips/Makefile 2005-11-22 01:36:46.000000000 +0100
+@@ -14,6 +14,7 @@ obj-$(CONFIG_SENSORS_RTC8564) += rtc8564
+ obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o
+ obj-$(CONFIG_TPS65010) += tps65010.o
+ obj-$(CONFIG_RTC_X1205_I2C) += x1205.o
++obj-$(CONFIG_RTC_PCF8563_I2C) += pcf8563.o
+
+ ifeq ($(CONFIG_I2C_DEBUG_CHIP),y)
+ EXTRA_CFLAGS += -DDEBUG
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-18 20:32:42 +0000