diff options
Diffstat (limited to 'packages/linux/openslug-kernel-2.6.11/x1205-rtc.c')
| -rw-r--r-- | packages/linux/openslug-kernel-2.6.11/x1205-rtc.c | 548 |
1 files changed, 0 insertions, 548 deletions
diff --git a/packages/linux/openslug-kernel-2.6.11/x1205-rtc.c b/packages/linux/openslug-kernel-2.6.11/x1205-rtc.c deleted file mode 100644 index 50fbc9e280..0000000000 --- a/packages/linux/openslug-kernel-2.6.11/x1205-rtc.c +++ /dev/null @@ -1,548 +0,0 @@ -/* - x1205 - an 12c driver for the Xicor X1205 RTC - Copyright 2004 Karen Spearel - - please send all reports to: - kas11 at tampabay dot rr dot com - - based on linux/drivers/acron/char/pcf8583.h - Copyright (C) 2000 Russell King - - 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. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ -/* - - * i2c_adapter is the structure used to identify a physical i2c bus along - * with the access algorithms necessary to access it. - -struct i2c_adapter { - struct module *owner; - unsigned int id; == is algo->id | hwdep.struct->id, for registered values see below - unsigned int class; - struct i2c_algorithm *algo; the algorithm to access the bus - void *algo_data; - - --- administration stuff. - int (*client_register)(struct i2c_client *); - int (*client_unregister)(struct i2c_client *); - - data fields that are valid for all devices - struct semaphore bus_lock; - struct semaphore clist_lock; - - int timeout; - int retries; - struct device dev; the adapter device - struct class_device class_dev; the class device - -#ifdef CONFIG_PROC_FS - No need to set this when you initialize the adapter - int inode; -#endif def CONFIG_PROC_FS - - int nr; - struct list_head clients; - struct list_head list; - char name[I2C_NAME_SIZE]; - struct completion dev_released; - struct completion class_dev_released; -}; -*/ - - -/*========== Driver for the X1205 on the Linksys NSLU2 ==================*/ - -#include <linux/init.h> -#include <linux/i2c.h> -#include <linux/slab.h> -#include <linux/string.h> -#include <linux/errno.h> -#include <linux/bcd.h> -#include <linux/rtc.h> -#include <linux/fs.h> -#include <linux/proc_fs.h> -#include <linux/miscdevice.h> -#include <linux/device.h> -#include <asm/uaccess.h> -#include <asm/system.h> -#include <linux/moduleparam.h> - -#define RTC_GETDATETIME 0 -#define RTC_SETTIME 1 -#define RTC_SETDATETIME 2 - -#define I2C_M_WR 0 // just for consistancy - -// 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_I2C_BUS_ADDR 0x6f // hardwired into x1205 -#define X1205_ALM0_BASE 0x00 // Base address of the ALM0 -#define X1205_CCR_BASE 0x30 // Base address of the CCR -#define X1205_SR_ADDR 0x3f // Status Register -#define X1205_SR_WEL 0x02 // Write Enable Latch bit -#define X1205_SR_RWEL 0x04 // Register Write Enable Bit -#define X1205_MILBIT 0x80 // this bit set in ccr.hour for 24 hr mode -#define NOERR 0 -#define RTC_NODATE 0 -#define RTC_DATETOO 1 - -// comment out next line is your x1205 can't do page writes -//#define X1205PAGEWRITE 1 -#ifdef X1205PAGEWRITE -#define DRIVERNAME "Xicor x1205 RTC Driver v0.9.3.3" -#else -#define DRIVERNAME "Xicor x1205 RTC Dvr v0.9.3.3NPW" -#endif - -#define DEBUG KERN_DEBUG - - -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_attach(struct i2c_adapter *adapter); -static int x1205_detach(struct i2c_client *client); -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_sync_rtc(void); -static int x1205_read(struct file *file, char *buf, size_t count, loff_t *ptr); -static int x1205_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg); -static int x1205_read_proc(char *buf, char **start, off_t off, int len, int *eof, void *data); - -static struct i2c_driver x1205_driver = { - .owner = THIS_MODULE, - .name = DRIVERNAME, - .id = I2C_DRIVERID_X1205, - .flags = I2C_DF_NOTIFY, - .attach_adapter = &x1205_attach, //we don't need to probe...x1205 is hardwired @ 0x6f - .detach_client = &x1205_detach, - .command = &x1205_command, //this prolly never gets called...used internally tho -}; - -static struct i2c_client x1205_i2c_client = { - .id = I2C_DRIVERID_X1205, - .flags = 0, - .addr = X1205_I2C_BUS_ADDR, // chip address - NOTE: 7bit - .adapter = NULL, // the adapter we sit on assigned in attach - .driver = &x1205_driver, // and our access routines - .usage_count = 0, // How many accesses currently to this client - .dev = {}, // the device structure - .list = {}, - .name = DRIVERNAME, - .released = {}, -}; - -static struct file_operations rtc_fops = { - owner: THIS_MODULE, - ioctl: x1205_ioctl, - read: x1205_read, -}; - -static struct miscdevice x1205_miscdev = { - .minor = RTC_MINOR, - .name = "rtc", - .fops = &rtc_fops, -}; -extern int (*set_rtc)(void); -static unsigned epoch = 1900; //coresponds to year 0 -static unsigned rtc_epoch = 2000; -static const unsigned char days_in_mo[] = -{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; - -//===================================CODE====================================== -// 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, I2C_M_WR, 2, addr }, //msg 1 = send base address - { client->addr, I2C_M_RD, 8, buf }, //msg 2 = read sequential data - }; - addr[1] = reg_base; - if ((i2c_transfer(client->adapter, msgs, 2)) == 2) { //did we read 2 messages? - printk(KERN_DEBUG "raw x1205 read data - sec-%02x min-%02x hr-%02x mday-%02x mon-%02x year-%02x wday-%02x y2k-%02x\n", - 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_MILBIT; - 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]); - rtc_epoch = BCD2BIN(buf[CCR_Y2K]) * 100; - tm->tm_year = BCD2BIN(buf[CCR_YEAR]) + rtc_epoch - epoch; - tm->tm_wday = buf[CCR_WDAY]; - printk(KERN_DEBUG "rtc_time output data - sec-%02d min-%02d hr-%02d mday-%02d mon-%02d year-%02d wday-%02d epoch-%d rtc_epoch-%d\n", - tm->tm_sec,tm->tm_min,tm->tm_hour,tm->tm_mday,tm->tm_mon,tm->tm_year,tm->tm_wday,epoch, rtc_epoch); - } else { - printk(KERN_DEBUG "i2c_transfer Read Error\n"); - return -EIO; - } - - return NOERR; -} -// x1205pagewrite allows writing a block of registers in msg3 even though the x1205 says -// nothing about this in its spec. -// it needs more testing as it is possible some x1205s are actually not-completely- -// functional x1226s and there is a reason for the multiple write to not be in the spec. -// anyhow, it is enabled for the time being...and we even push out luck by sending 10 bytes - -static int x1205_set_datetime(struct i2c_client *client, struct rtc_time *tm, int datetoo, u8 reg_base) -{ - static unsigned char wel[3] = { 0, X1205_SR_ADDR, X1205_SR_WEL }; - static unsigned char rwel[3] = { 0, X1205_SR_ADDR, X1205_SR_WEL | X1205_SR_RWEL }; - static unsigned char diswe[3] = { 0, X1205_SR_ADDR, 0 }; - -#ifdef X1205PAGEWRITE - - static unsigned char buf[10] = { 0, X1205_CCR_BASE, }; - struct i2c_msg msgs[4] = { - { client->addr, I2C_M_WR, 3, wel }, //msg 1 = write WEL to to ccr sr - { client->addr, I2C_M_WR, 3, rwel }, //msg 2 = write RWEL to ccr sr - { client->addr, I2C_M_WR, 10, buf }, //msg 3 = write ccr base addr +seq data - { client->addr, I2C_M_WR, 3, diswe }, //msg 4 = 0 to ccr sr to disable writes - }; - - msgs[2].len = 5; // 5 bytes + addr to set time only - buf [1] = reg_base; - buf[CCR_SEC+2] = BIN2BCD(tm->tm_sec); - buf[CCR_MIN+2] = BIN2BCD(tm->tm_min); - buf[CCR_HOUR+2] = BIN2BCD(tm->tm_hour) | X1205_MILBIT; // set 24 hour format - if (datetoo == 1) { - buf[CCR_MDAY+2] = BIN2BCD(tm->tm_mday); - buf[CCR_MONTH+2] = BIN2BCD(tm->tm_mon); // input is 0-11 - buf[CCR_YEAR+2] = BIN2BCD((tm->tm_year + epoch - rtc_epoch)); // input is yrs since 1900 - buf[CCR_WDAY+2] = tm->tm_wday & 7; - buf[CCR_Y2K+2] = BIN2BCD((rtc_epoch/100)); - msgs[2].len += 5; //5 more bytes to set date - } - printk(KERN_DEBUG "rtc_time input - sec-%02d min-%02d hour-%02d mday-%02d mon-%02d year-%02d wday-%02d epoch-%d rtc_epoch-%d\n", - tm->tm_sec,tm->tm_min,tm->tm_hour,tm->tm_mday,tm->tm_mon,tm->tm_year,tm->tm_wday, epoch, rtc_epoch); - printk(KERN_DEBUG "BCD write data - sec-%02x min-%02x hour-%02x mday-%02x mon-%02x year-%02x wday-%02x y2k-%02x\n", - buf[2],buf[3],buf[4],buf[5],buf[6], buf[7], buf[8], buf[9]); - - if ((i2c_transfer(client->adapter, msgs, 4)) != 4) - return -EIO; - return NOERR; - -#else //do this if page writes aren't working - - int i,xfer; - static unsigned char data[3] = { 0,}; - static unsigned char buf[8]; - - buf[CCR_SEC] = BIN2BCD(tm->tm_sec); - buf[CCR_MIN] = BIN2BCD(tm->tm_min); - buf[CCR_HOUR] = BIN2BCD(tm->tm_hour) | X1205_MILBIT; // set 24 hour format - if (datetoo == 1) { - buf[CCR_MDAY] = BIN2BCD(tm->tm_mday); - buf[CCR_MONTH] = BIN2BCD(tm->tm_mon); // input is 0-11 - buf[CCR_YEAR] = BIN2BCD((tm->tm_year + epoch - rtc_epoch)); // input is yrs since 1900 - buf[CCR_WDAY] = tm->tm_wday & 7; - buf[CCR_Y2K] = BIN2BCD((rtc_epoch/100)); - } - printk(KERN_DEBUG "rtc_time input - sec-%02d min-%02d hour-%02d mday-%02d mon-%02d year-%02d wday-%02d epoch-%d rtc_epoch-%d\n", - tm->tm_sec,tm->tm_min,tm->tm_hour,tm->tm_mday,tm->tm_mon,tm->tm_year,tm->tm_wday, epoch, rtc_epoch); - - xfer = i2c_master_send(client, wel, 3); - printk(KERN_DEBUG "wen - %x\n", xfer); - if (xfer != 3) - return -EIO; - - xfer = i2c_master_send(client, rwel, 3); - printk(KERN_DEBUG "wenb - %x\n", 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); - printk(KERN_DEBUG "xfer - %d addr - %02x data - %02x\n", xfer, data[1], data[2]); - if (xfer != 3) - return -EIO; - }; - - xfer = i2c_master_send(client, diswe, 3); - printk(KERN_DEBUG "wdis - %x\n", xfer); - if (xfer != 3) - return -EIO; - return NOERR; -#endif -} -//============================================================================= - -static int x1205_attach(struct i2c_adapter *adapter) -{ - struct rtc_time tm; - struct timespec tv; - int errno; - - x1205_i2c_client.adapter = adapter; - x1205_i2c_client.id++; - - if ((x1205_get_datetime(&x1205_i2c_client, &tm, X1205_CCR_BASE)) != NOERR) //test for functional driver - return -EIO; - - if ((errno = i2c_attach_client(&x1205_i2c_client)) != NOERR) - return errno; - - tv.tv_nsec = tm.tm_sec * 10000000; - tv.tv_sec = mktime(tm.tm_year+epoch, tm.tm_mon, tm.tm_mday, tm.tm_hour, - tm.tm_min, tm.tm_sec); - do_settimeofday(&tv); - set_rtc = x1205_sync_rtc; - - printk(KERN_DEBUG "%s attached on adapter %s\n",x1205_i2c_client.name, - x1205_i2c_client.adapter->name); //why is this name a null string? - - return NOERR; -} - -static int x1205_detach(struct i2c_client *client) -{ - int errno; - - if ((errno = i2c_detach_client(client)) != 0) { - printk(KERN_DEBUG "i2c_detach failed - errno = %d\n", errno); - return errno; - } - - return NOERR; -} - -// 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 < 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) > 255) - return -EINVAL; - - if ((tm->tm_hour >= 24) || (tm->tm_min >= 60) || (tm->tm_sec >= 60)) - return -EINVAL; - return NOERR; -} - -static int x1205_command(struct i2c_client *client, unsigned int cmd, void *tm) -{ - int errno, dodate = RTC_DATETOO; - - if (client == NULL || tm == NULL) - return -EINVAL; - if (!capable(CAP_SYS_TIME)) - return -EACCES; - - printk(KERN_DEBUG "x1205_command %d\n", cmd); - - switch (cmd) { - case RTC_GETDATETIME: - return x1205_get_datetime(client, tm, X1205_CCR_BASE); - - case RTC_SETTIME: // note fall thru - dodate = RTC_NODATE; - case RTC_SETDATETIME: - if ((errno = x1205_validate_tm(tm)) < NOERR) - return errno; - return x1205_set_datetime(client, tm, dodate, X1205_CCR_BASE); - - default: - return -EINVAL; - } -} - -static int x1205_sync_rtc(void) -{ - struct rtc_time new_tm, old_tm; - unsigned long cur_secs = xtime.tv_sec; - - printk(KERN_DEBUG "x1205_sync_rtc entry\n"); - - if (x1205_command(&x1205_i2c_client, RTC_GETDATETIME, &old_tm)) - return 0; - -// xtime.tv_nsec = old_tm.tm_sec * 10000000; //FIXME: - new_tm.tm_sec = cur_secs % 60; - cur_secs /= 60; - new_tm.tm_min = cur_secs % 60; - cur_secs /= 60; - new_tm.tm_hour = cur_secs % 24; - - /* - * avoid writing when we're going to change the day - * of the month. We will retry in the next minute. - * This basically means that if the RTC must not drift - * by more than 1 minute in 11 minutes. - */ - if ((old_tm.tm_hour == 23 && old_tm.tm_min == 59) || - (new_tm.tm_hour == 23 && new_tm.tm_min == 59)) - return 1; - printk(KERN_DEBUG "x1205_sync_rtc exit\n"); - - return x1205_command(&x1205_i2c_client, RTC_SETTIME, &new_tm); -} - -static int x1205_read(struct file *file, char *buf, size_t count, loff_t *ptr) -{ - struct rtc_time tm; - - if ((x1205_get_datetime(&x1205_i2c_client, &tm, X1205_CCR_BASE)) < NOERR) - return -EIO; - return copy_to_user(buf, &tm, sizeof(tm)) ? -EFAULT : NOERR; -} - -//============================================================================== - -static int x1205_ioctl(struct inode *inode, struct file *file, unsigned int cmd, - unsigned long arg) -{ - struct rtc_time tm; - int errno; - - printk(KERN_DEBUG "ioctl = %x\n", cmd); - - switch (cmd) { - case RTC_RD_TIME: - if ((x1205_get_datetime(&x1205_i2c_client, &tm, X1205_CCR_BASE)) < NOERR) - return -EIO; - break; - - case RTC_SET_TIME: - if (!capable(CAP_SYS_TIME)) - return -EACCES; - - if (copy_from_user(&tm, (struct rtc_time *) arg, sizeof(struct rtc_time))) - return -EFAULT; - if ((errno = x1205_validate_tm(&tm)) < NOERR) - return errno; - return x1205_set_datetime(&x1205_i2c_client, &tm, RTC_DATETOO, X1205_CCR_BASE); - - case RTC_ALM_SET: //FIXME: set Control Regs - if (copy_from_user(&tm, (struct rtc_time *) arg, sizeof(struct rtc_time))) - return -EFAULT; - return x1205_set_datetime(&x1205_i2c_client, &tm, RTC_DATETOO, X1205_ALM0_BASE); - - case RTC_ALM_READ: - if ((x1205_get_datetime(&x1205_i2c_client, &tm, X1205_ALM0_BASE)) < NOERR) - return -EIO; - break; - - case RTC_EPOCH_READ: - - return put_user (epoch, (unsigned long __user *)arg); - - case RTC_EPOCH_SET: - if (arg < 1900) - return -EINVAL; - - if (!capable(CAP_SYS_TIME)) - return -EACCES; - - epoch = arg; - return 0; - - default: - return -ENOTTY; - } - return copy_to_user((void __user *)arg, &tm, sizeof tm) ? -EFAULT : 0; - -} - -static int x1205_read_proc(char *buf, char **start, off_t off, int len, int *eof, void *data) -{ - struct rtc_time tm; - int slen, errno; - - if ((errno = x1205_get_datetime(&x1205_i2c_client, &tm, X1205_CCR_BASE)) < NOERR) - return errno; - -// here we return the real year and the month as 1-12 since it is human-readable - slen = sprintf(buf, "rtc_time\t: %02d:%02d:%02d\nrtc_date\t: %04d-%02d-%02d\n", - tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_year + 1900, tm.tm_mon+1, tm.tm_mday); - printk(KERN_DEBUG "raw rtc_time\t: %02d:%02d:%02d\nraw rtc_date\t: %04d-%02d-%02d\n", - tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_year, tm.tm_mon, tm.tm_mday); - - if (slen <= off + len) - *eof = 1; - *start = buf + off; - slen -= off; - if (slen > len) - slen = len; - if ( slen < 0 ) - slen = 0; - - return slen; -} - -static int __init x1205_init(void) -{ - struct rtc_time tm; - int errno; - printk(KERN_INFO "LOADED %s\n", DRIVERNAME); - - if ((errno = i2c_add_driver(&x1205_driver)) != NOERR) { - dev_dbg(x1205_i2c_client.dev, "x1205_init failed - errno = %d\n", errno); - return (errno); - } - if ((errno = misc_register(&x1205_miscdev)) != NOERR) { - dev_dbg(x1205_i2c_client.dev, "Register Misc Driver failed - errno = %d\n", errno); - i2c_del_driver(&x1205_driver); - return errno; - } - if (create_proc_read_entry("driver/rtc", 0, NULL, x1205_read_proc, NULL) < NOERR) - return -ENOMEM; - if ((x1205_get_datetime(&x1205_i2c_client, &tm, X1205_CCR_BASE)) != NOERR) //test for functionality - return -EIO; - - return NOERR; -} - -static void __exit x1205_exit(void) -{ - remove_proc_entry("driver/rtc", NULL); - misc_deregister(&x1205_miscdev); - i2c_del_driver(&x1205_driver); - set_rtc = NULL; -} - -MODULE_AUTHOR("Karen Spearel <kas11@tampabay.rr.com>"); -MODULE_DESCRIPTION("Xicor X1205-RTC Driver"); -MODULE_LICENSE("GPL"); -static int debug = 7; -module_param(debug, bool, 0644); -MODULE_PARM_DESC(debug, "Debugging enabled = 1"); - -module_init(x1205_init); -module_exit(x1205_exit); |