diff options
Diffstat (limited to 'package/rtc-rv5c386a')
| -rw-r--r-- | package/rtc-rv5c386a/Makefile | 38 | ||||
| -rw-r--r-- | package/rtc-rv5c386a/src/Makefile | 18 | ||||
| -rw-r--r-- | package/rtc-rv5c386a/src/rtc.c | 611 |
3 files changed, 0 insertions, 667 deletions
diff --git a/package/rtc-rv5c386a/Makefile b/package/rtc-rv5c386a/Makefile deleted file mode 100644 index e13ead528..000000000 --- a/package/rtc-rv5c386a/Makefile +++ /dev/null @@ -1,38 +0,0 @@ -# -# Copyright (C) 2006-2009 OpenWrt.org -# -# This is free software, licensed under the GNU General Public License v2. -# See /LICENSE for more information. -# - -include $(TOPDIR)/rules.mk -include $(INCLUDE_DIR)/kernel.mk - -PKG_NAME:=rtc-rv5c386a -PKG_RELEASE:=1 - -include $(INCLUDE_DIR)/package.mk - -define KernelPackage/rtc-rv5c386a - SUBMENU:=Other modules - DEPENDS:=@TARGET_brcm47xx - TITLE:=Driver for RTC RV5C386A (used in WL-700gE and WL-HDD) - AUTOLOAD:=$(call AutoLoad,70,rtc) - FILES:=$(PKG_BUILD_DIR)/rtc.ko -endef - -define Build/Prepare - mkdir -p $(PKG_BUILD_DIR) - $(CP) ./src/* $(PKG_BUILD_DIR)/ -endef - -define Build/Compile - $(MAKE) -C "$(LINUX_DIR)" \ - CROSS_COMPILE="$(TARGET_CROSS)" \ - ARCH="$(LINUX_KARCH)" \ - SUBDIRS="$(PKG_BUILD_DIR)" \ - EXTRA_CFLAGS="$(BUILDFLAGS)" \ - modules -endef - -$(eval $(call KernelPackage,rtc-rv5c386a)) diff --git a/package/rtc-rv5c386a/src/Makefile b/package/rtc-rv5c386a/src/Makefile deleted file mode 100644 index eeb043077..000000000 --- a/package/rtc-rv5c386a/src/Makefile +++ /dev/null @@ -1,18 +0,0 @@ -# $Id$ -# -# Makefile for Real Time Clock driver for WL-HDD -# -# Copyright (C) 2007 Andreas Engel -# -# 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. -# - -obj-m := rtc.o - -ifeq ($(MAKING_MODULES),1) - --include $(TOPDIR)/Rules.make -endif diff --git a/package/rtc-rv5c386a/src/rtc.c b/package/rtc-rv5c386a/src/rtc.c deleted file mode 100644 index 7c51bf4bf..000000000 --- a/package/rtc-rv5c386a/src/rtc.c +++ /dev/null @@ -1,611 +0,0 @@ -/* - * Real Time Clock driver for WL-HDD - * - * Copyright (C) 2007 Andreas Engel - * - * Hacked together mostly by copying the relevant code parts from: - * drivers/i2c/i2c-bcm5365.c - * drivers/i2c/i2c-algo-bit.c - * drivers/char/rtc.c - * - * Note 1: - * This module uses the standard char device (10,135), while the Asus module - * rtcdrv.o uses (12,0). So, both can coexist which might be handy during - * development (but see the comment in rtc_open()). - * - * Note 2: - * You might need to set the clock once after loading the driver the first - * time because the driver switches the chip into 24h mode if it is running - * in 12h mode. - * - * Usage: - * For compatibility reasons with the original asus driver, the time can be - * read and set via the /dev/rtc device entry. The only accepted data format - * is "YYYY:MM:DD:W:HH:MM:SS\n". See OpenWrt wiki for a script which handles - * this format. - * - * In addition, this driver supports the standard ioctl() calls for setting - * and reading the hardware clock, so the ordinary hwclock utility can also - * be used. - * - * 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. - * - * TODO: - * - add a /proc/driver/rtc interface? - * - make the battery failure bit available through the /proc interface? - * - * $Id: rtc.c 7 2007-05-25 19:37:01Z ae $ - */ - -#include <linux/module.h> -#include <linux/kmod.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/miscdevice.h> -#include <linux/ioport.h> -#include <linux/fcntl.h> -#include <linux/mc146818rtc.h> -#include <linux/init.h> -#include <linux/spinlock.h> -#include <linux/rtc.h> -#include <linux/delay.h> -#include <linux/version.h> -#include <linux/gpio.h> -#include <linux/uaccess.h> - -#include <asm/current.h> -#include <asm/system.h> - -#include <bcm47xx.h> -#include <nvram.h> - -#define RTC_IS_OPEN 0x01 /* Means /dev/rtc is in use. */ - -/* Can be changed via a module parameter. */ -static int rtc_debug = 0; - -static unsigned long rtc_status = 0; /* Bitmapped status byte. */ - -/* These settings are platform dependents. */ -unsigned int sda_index = 0; -unsigned int scl_index = 0; - -#define I2C_READ_MASK 1 -#define I2C_WRITE_MASK 0 - -#define I2C_ACK 1 -#define I2C_NAK 0 - -#define RTC_EPOCH 1900 -#define RTC_I2C_ADDRESS (0x32 << 1) -#define RTC_24HOUR_MODE_MASK 0x20 -#define RTC_PM_MASK 0x20 -#define RTC_VDET_MASK 0x40 -#define RTC_Y2K_MASK 0x80 - -/* - * Delay in microseconds for generating the pulses on the I2C bus. We use - * a rather conservative setting here. See datasheet of the RTC chip. - */ -#define ADAP_DELAY 50 - -/* Avoid spurious compiler warnings. */ -#define UNUSED __attribute__((unused)) - -MODULE_AUTHOR("Andreas Engel"); -MODULE_LICENSE("GPL"); - -/* Test stolen from switch-adm.c. */ -module_param(rtc_debug, int, 0); - -static inline void sdalo(void) -{ - gpio_direction_output(sda_index, 1); - udelay(ADAP_DELAY); -} - -static inline void sdahi(void) -{ - gpio_direction_input(sda_index); - udelay(ADAP_DELAY); -} - -static inline void scllo(void) -{ - gpio_direction_output(scl_index, 1); - udelay(ADAP_DELAY); -} - -static inline int getscl(void) -{ - return (gpio_get_value(scl_index)); -} - -static inline int getsda(void) -{ - return (gpio_get_value(sda_index)); -} - -/* - * We shouldn't simply set the SCL pin to high. Like SDA, the SCL line is - * bidirectional too. According to the I2C spec, the slave is allowed to - * pull down the SCL line to slow down the clock, so we need to check this. - * Generally, we'd need a timeout here, but in our case, we just check the - * line, assuming the RTC chip behaves well. - */ -static int sclhi(void) -{ - gpio_direction_input(scl_index); - udelay(ADAP_DELAY); - if (!getscl()) { - printk(KERN_ERR "SCL pin should be low\n"); - return -ETIMEDOUT; - } - return 0; -} - -static void i2c_start(void) -{ - sdalo(); - scllo(); -} - -static void i2c_stop(void) -{ - sdalo(); - sclhi(); - sdahi(); -} - -static int i2c_outb(int c) -{ - int i; - int ack; - - /* assert: scl is low */ - for (i = 7; i >= 0; i--) { - if (c & ( 1 << i )) { - sdahi(); - } else { - sdalo(); - } - if (sclhi() < 0) { /* timed out */ - sdahi(); /* we don't want to block the net */ - return -ETIMEDOUT; - }; - scllo(); - } - sdahi(); - if (sclhi() < 0) { - return -ETIMEDOUT; - }; - /* read ack: SDA should be pulled down by slave */ - ack = getsda() == 0; /* ack: sda is pulled low ->success. */ - scllo(); - - if (rtc_debug) - printk(KERN_DEBUG "i2c_outb(0x%02x) -> %s\n", - c, ack ? "ACK": "NAK"); - - return ack; /* return 1 if device acked */ - /* assert: scl is low (sda undef) */ -} - -static int i2c_inb(int ack) -{ - int i; - unsigned int indata = 0; - - /* assert: scl is low */ - - sdahi(); - for (i = 0; i < 8; i++) { - if (sclhi() < 0) { - return -ETIMEDOUT; - }; - indata *= 2; - if (getsda()) - indata |= 0x01; - scllo(); - } - if (ack) { - sdalo(); - } else { - sdahi(); - } - - if (sclhi() < 0) { - sdahi(); - return -ETIMEDOUT; - } - scllo(); - sdahi(); - - if (rtc_debug) - printk(KERN_DEBUG "i2c_inb() -> 0x%02x\n", indata); - - /* assert: scl is low */ - return indata & 0xff; -} - -static void i2c_init(void) -{ - /* no gpio_control for EXTIF */ - // ssb_gpio_control(&ssb, sda_mask | scl_mask, 0); - - gpio_set_value(sda_index, 0); - gpio_set_value(scl_index, 0); - sdahi(); - sclhi(); -} - -static int rtc_open(UNUSED struct inode *inode, UNUSED struct file *filp) -{ - spin_lock_irq(&rtc_lock); - - if (rtc_status & RTC_IS_OPEN) { - spin_unlock_irq(&rtc_lock); - return -EBUSY; - } - - rtc_status |= RTC_IS_OPEN; - - /* - * The following call is only necessary if we use both this driver and - * the proprietary one from asus at the same time (which, b.t.w. only - * makes sense during development). Otherwise, each access via the asus - * driver will make access via this driver impossible. - */ - i2c_init(); - - spin_unlock_irq(&rtc_lock); - - return 0; -} - -static int rtc_release(UNUSED struct inode *inode, UNUSED struct file *filp) -{ - /* No need for locking here. */ - rtc_status &= ~RTC_IS_OPEN; - return 0; -} - -static int from_bcd(int bcdnum) -{ - int fac, num = 0; - - for (fac = 1; bcdnum; fac *= 10) { - num += (bcdnum % 16) * fac; - bcdnum /= 16; - } - - return num; -} - -static int to_bcd(int decnum) -{ - int fac, num = 0; - - for (fac = 1; decnum; fac *= 16) { - num += (decnum % 10) * fac; - decnum /= 10; - } - - return num; -} - -static void get_rtc_time(struct rtc_time *rtc_tm) -{ - int cr2; - - /* - * Read date and time from the RTC. We use read method (3). - */ - - spin_lock_irq(&rtc_lock); - i2c_start(); - i2c_outb(RTC_I2C_ADDRESS | I2C_READ_MASK); - cr2 = i2c_inb(I2C_ACK); - rtc_tm->tm_sec = i2c_inb(I2C_ACK); - rtc_tm->tm_min = i2c_inb(I2C_ACK); - rtc_tm->tm_hour = i2c_inb(I2C_ACK); - rtc_tm->tm_wday = i2c_inb(I2C_ACK); - rtc_tm->tm_mday = i2c_inb(I2C_ACK); - rtc_tm->tm_mon = i2c_inb(I2C_ACK); - rtc_tm->tm_year = i2c_inb(I2C_NAK); - i2c_stop(); - spin_unlock_irq(&rtc_lock); - - if (cr2 & RTC_VDET_MASK) { - printk(KERN_WARNING "***RTC BATTERY FAILURE***\n"); - } - - /* Handle century bit */ - if (rtc_tm->tm_mon & RTC_Y2K_MASK) { - rtc_tm->tm_mon &= ~RTC_Y2K_MASK; - rtc_tm->tm_year += 0x100; - } - - rtc_tm->tm_sec = from_bcd(rtc_tm->tm_sec); - rtc_tm->tm_min = from_bcd(rtc_tm->tm_min); - rtc_tm->tm_hour = from_bcd(rtc_tm->tm_hour); - rtc_tm->tm_mday = from_bcd(rtc_tm->tm_mday); - rtc_tm->tm_mon = from_bcd(rtc_tm->tm_mon) - 1; - rtc_tm->tm_year = from_bcd(rtc_tm->tm_year); - - rtc_tm->tm_isdst = -1; /* DST not known */ -} - -static void set_rtc_time(struct rtc_time *rtc_tm) -{ - rtc_tm->tm_sec = to_bcd(rtc_tm->tm_sec); - rtc_tm->tm_min = to_bcd(rtc_tm->tm_min); - rtc_tm->tm_hour = to_bcd(rtc_tm->tm_hour); - rtc_tm->tm_mday = to_bcd(rtc_tm->tm_mday); - rtc_tm->tm_mon = to_bcd(rtc_tm->tm_mon + 1); - rtc_tm->tm_year = to_bcd(rtc_tm->tm_year); - - if (rtc_tm->tm_year >= 0x100) { - rtc_tm->tm_year -= 0x100; - rtc_tm->tm_mon |= RTC_Y2K_MASK; - } - - spin_lock_irq(&rtc_lock); - i2c_start(); - i2c_outb(RTC_I2C_ADDRESS | I2C_WRITE_MASK); - i2c_outb(0x00); /* set starting register to 0 (=seconds) */ - i2c_outb(rtc_tm->tm_sec); - i2c_outb(rtc_tm->tm_min); - i2c_outb(rtc_tm->tm_hour); - i2c_outb(rtc_tm->tm_wday); - i2c_outb(rtc_tm->tm_mday); - i2c_outb(rtc_tm->tm_mon); - i2c_outb(rtc_tm->tm_year); - i2c_stop(); - spin_unlock_irq(&rtc_lock); -} - -static ssize_t rtc_write(UNUSED struct file *filp, const char *buf, - size_t count, loff_t *ppos) -{ - struct rtc_time rtc_tm; - char buffer[23]; - char *p; - - if (!capable(CAP_SYS_TIME)) - return -EACCES; - - if (ppos != &filp->f_pos) - return -ESPIPE; - - /* - * For simplicity, the only acceptable format is: - * YYYY:MM:DD:W:HH:MM:SS\n - */ - - if (count != 22) - goto err_out; - - if (copy_from_user(buffer, buf, count)) - return -EFAULT; - - buffer[sizeof(buffer)-1] = '\0'; - - p = &buffer[0]; - - rtc_tm.tm_year = simple_strtoul(p, &p, 10); - if (*p++ != ':') goto err_out; - - rtc_tm.tm_mon = simple_strtoul(p, &p, 10) - 1; - if (*p++ != ':') goto err_out; - - rtc_tm.tm_mday = simple_strtoul(p, &p, 10); - if (*p++ != ':') goto err_out; - - rtc_tm.tm_wday = simple_strtoul(p, &p, 10); - if (*p++ != ':') goto err_out; - - rtc_tm.tm_hour = simple_strtoul(p, &p, 10); - if (*p++ != ':') goto err_out; - - rtc_tm.tm_min = simple_strtoul(p, &p, 10); - if (*p++ != ':') goto err_out; - - rtc_tm.tm_sec = simple_strtoul(p, &p, 10); - if (*p != '\n') goto err_out; - - rtc_tm.tm_year -= RTC_EPOCH; - - set_rtc_time(&rtc_tm); - - *ppos += count; - - return count; - - err_out: - printk(KERN_ERR "invalid format: use YYYY:MM:DD:W:HH:MM:SS\\n\n"); - return -EINVAL; -} - - -static ssize_t rtc_read(UNUSED struct file *filp, char *buf, size_t count, - loff_t *ppos) -{ - char wbuf[23]; - struct rtc_time tm; - ssize_t len; - - if (count == 0 || *ppos != 0) - return 0; - - get_rtc_time(&tm); - - len = sprintf(wbuf, "%04d:%02d:%02d:%d:%02d:%02d:%02d\n", - tm.tm_year + RTC_EPOCH, - tm.tm_mon + 1, - tm.tm_mday, - tm.tm_wday, - tm.tm_hour, - tm.tm_min, - tm.tm_sec); - - if (len > (ssize_t)count) - len = count; - - if (copy_to_user(buf, wbuf, len)) - return -EFAULT; - - *ppos += len; - - return len; -} - -static int rtc_do_ioctl(unsigned int cmd, unsigned long arg) -{ - struct rtc_time rtc_tm; - - switch (cmd) { - case RTC_RD_TIME: - memset(&rtc_tm, 0, sizeof(struct rtc_time)); - get_rtc_time(&rtc_tm); - if (copy_to_user((void *)arg, &rtc_tm, sizeof(rtc_tm))) - return -EFAULT; - break; - - case RTC_SET_TIME: - if (!capable(CAP_SYS_TIME)) - return -EACCES; - - if (copy_from_user(&rtc_tm, (struct rtc_time *)arg, - sizeof(struct rtc_time))) - return -EFAULT; - - set_rtc_time(&rtc_tm); - break; - - default: - return -ENOTTY; - } - - return 0; -} - -static long rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -{ - long ret; - ret = rtc_do_ioctl(cmd, arg); - return ret; -} - -static const struct file_operations rtc_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .read = rtc_read, - .write = rtc_write, - .unlocked_ioctl = rtc_ioctl, - .open = rtc_open, - .release = rtc_release, -}; - -static struct miscdevice rtc_dev = { - .minor = RTC_MINOR, - .name = "rtc", - .fops = &rtc_fops, -}; - -/* Savagely ripped from diag.c. */ -static inline int startswith (char *source, char *cmp) -{ - return !strncmp(source, cmp, strlen(cmp)); -} - -static void platform_detect(void) -{ - char buf[20]; - int et0phyaddr, et1phyaddr; - - /* Based on "model_no". */ - if (nvram_getenv("model_no", buf, sizeof(buf)) >= 0) { - if (startswith(buf, "WL700")) { /* WL700* */ - sda_index = 2; - scl_index = 5; - return; - } - } - - if (nvram_getenv("et0phyaddr", buf, sizeof(buf)) >= 0 ) - et0phyaddr = simple_strtoul(buf, NULL, 0); - if (nvram_getenv("et1phyaddr", buf, sizeof(buf)) >= 0 ) - et1phyaddr = simple_strtoul(buf, NULL, 0); - - if (nvram_getenv("hardware_version", buf, sizeof(buf)) >= 0) { - /* Either WL-300g or WL-HDD, do more extensive checks */ - if (startswith(buf, "WL300-") && et0phyaddr == 0 && et1phyaddr == 1) { - sda_index = 4; - scl_index = 5; - return; - } - } - /* not found */ -} - -static int __init rtc_init(void) -{ - int cr1; - - platform_detect(); - - if (sda_index == scl_index) { - printk(KERN_ERR "RTC-RV5C386A: unrecognized platform!\n"); - return -ENODEV; - } - - i2c_init(); - - /* - * Switch RTC to 24h mode - */ - spin_lock_irq(&rtc_lock); - i2c_start(); - i2c_outb(RTC_I2C_ADDRESS | I2C_WRITE_MASK); - i2c_outb(0xE4); /* start at address 0xE, transmission mode 4 */ - cr1 = i2c_inb(I2C_NAK); - i2c_stop(); - spin_unlock_irq(&rtc_lock); - if ((cr1 & RTC_24HOUR_MODE_MASK) == 0) { - /* RTC is running in 12h mode */ - printk(KERN_INFO "rtc.o: switching to 24h mode\n"); - spin_lock_irq(&rtc_lock); - i2c_start(); - i2c_outb(RTC_I2C_ADDRESS | I2C_WRITE_MASK); - i2c_outb(0xE0); - i2c_outb(cr1 | RTC_24HOUR_MODE_MASK); - i2c_stop(); - spin_unlock_irq(&rtc_lock); - } - - misc_register(&rtc_dev); - - printk(KERN_INFO "RV5C386A Real Time Clock Driver loaded\n"); - - return 0; -} - -static void __exit rtc_exit (void) -{ - misc_deregister(&rtc_dev); - printk(KERN_INFO "Successfully removed RTC RV5C386A driver\n"); -} - -module_init(rtc_init); -module_exit(rtc_exit); - -/* - * Local Variables: - * indent-tabs-mode:t - * c-basic-offset:8 - * End: - */ |