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Diffstat (limited to 'arch/cris/arch-v10/drivers/ds1302.c')
-rw-r--r--arch/cris/arch-v10/drivers/ds1302.c71
1 files changed, 49 insertions, 22 deletions
diff --git a/arch/cris/arch-v10/drivers/ds1302.c b/arch/cris/arch-v10/drivers/ds1302.c
index fba530fcfae..10795f67f68 100644
--- a/arch/cris/arch-v10/drivers/ds1302.c
+++ b/arch/cris/arch-v10/drivers/ds1302.c
@@ -7,6 +7,15 @@
*! Functions exported: ds1302_readreg, ds1302_writereg, ds1302_init
*!
*! $Log: ds1302.c,v $
+*! Revision 1.18 2005/01/24 09:11:26 mikaelam
+*! Minor changes to get DS1302 RTC chip driver to work
+*!
+*! Revision 1.17 2005/01/05 06:11:22 starvik
+*! No need to do local_irq_disable after local_irq_save.
+*!
+*! Revision 1.16 2004/12/13 12:21:52 starvik
+*! Added I/O and DMA allocators from Linux 2.4
+*!
*! Revision 1.14 2004/08/24 06:48:43 starvik
*! Whitespace cleanup
*!
@@ -124,9 +133,9 @@
*!
*! ---------------------------------------------------------------------------
*!
-*! (C) Copyright 1999, 2000, 2001 Axis Communications AB, LUND, SWEDEN
+*! (C) Copyright 1999, 2000, 2001, 2002, 2003, 2004 Axis Communications AB, LUND, SWEDEN
*!
-*! $Id: ds1302.c,v 1.14 2004/08/24 06:48:43 starvik Exp $
+*! $Id: ds1302.c,v 1.18 2005/01/24 09:11:26 mikaelam Exp $
*!
*!***************************************************************************/
@@ -145,6 +154,7 @@
#include <asm/arch/svinto.h>
#include <asm/io.h>
#include <asm/rtc.h>
+#include <asm/arch/io_interface_mux.h>
#define RTC_MAJOR_NR 121 /* local major, change later */
@@ -320,7 +330,6 @@ get_rtc_time(struct rtc_time *rtc_tm)
unsigned long flags;
local_irq_save(flags);
- local_irq_disable();
rtc_tm->tm_sec = CMOS_READ(RTC_SECONDS);
rtc_tm->tm_min = CMOS_READ(RTC_MINUTES);
@@ -358,7 +367,7 @@ static int
rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
- unsigned long flags;
+ unsigned long flags;
switch(cmd) {
case RTC_RD_TIME: /* read the time/date from RTC */
@@ -382,7 +391,7 @@ rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
return -EPERM;
if (copy_from_user(&rtc_tm, (struct rtc_time*)arg, sizeof(struct rtc_time)))
- return -EFAULT;
+ return -EFAULT;
yrs = rtc_tm.tm_year + 1900;
mon = rtc_tm.tm_mon + 1; /* tm_mon starts at zero */
@@ -419,7 +428,6 @@ rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
BIN_TO_BCD(yrs);
local_irq_save(flags);
- local_irq_disable();
CMOS_WRITE(yrs, RTC_YEAR);
CMOS_WRITE(mon, RTC_MONTH);
CMOS_WRITE(day, RTC_DAY_OF_MONTH);
@@ -438,7 +446,7 @@ rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
case RTC_SET_CHARGE: /* set the RTC TRICKLE CHARGE register */
{
- int tcs_val;
+ int tcs_val;
if (!capable(CAP_SYS_TIME))
return -EPERM;
@@ -492,8 +500,8 @@ print_rtc_status(void)
/* The various file operations we support. */
static struct file_operations rtc_fops = {
- .owner = THIS_MODULE,
- .ioctl = rtc_ioctl,
+ .owner = THIS_MODULE,
+ .ioctl = rtc_ioctl,
};
/* Probe for the chip by writing something to its RAM and try reading it back. */
@@ -532,7 +540,7 @@ ds1302_probe(void)
"PB",
#endif
CONFIG_ETRAX_DS1302_RSTBIT);
- print_rtc_status();
+ print_rtc_status();
retval = 1;
} else {
stop();
@@ -548,7 +556,9 @@ ds1302_probe(void)
int __init
ds1302_init(void)
{
+#ifdef CONFIG_ETRAX_I2C
i2c_init();
+#endif
if (!ds1302_probe()) {
#ifdef CONFIG_ETRAX_DS1302_RST_ON_GENERIC_PORT
@@ -558,25 +568,42 @@ ds1302_init(void)
*
* Make sure that R_GEN_CONFIG is setup correct.
*/
- genconfig_shadow = ((genconfig_shadow &
- ~IO_MASK(R_GEN_CONFIG, ata)) |
- (IO_STATE(R_GEN_CONFIG, ata, select)));
- *R_GEN_CONFIG = genconfig_shadow;
+ /* Allocating the ATA interface will grab almost all
+ * pins in I/O groups a, b, c and d. A consequence of
+ * allocating the ATA interface is that the fixed
+ * interfaces shared RAM, parallel port 0, parallel
+ * port 1, parallel port W, SCSI-8 port 0, SCSI-8 port
+ * 1, SCSI-W, serial port 2, serial port 3,
+ * synchronous serial port 3 and USB port 2 and almost
+ * all GPIO pins on port g cannot be used.
+ */
+ if (cris_request_io_interface(if_ata, "ds1302/ATA")) {
+ printk(KERN_WARNING "ds1302: Failed to get IO interface\n");
+ return -1;
+ }
+
#elif CONFIG_ETRAX_DS1302_RSTBIT == 0
-
- /* Set the direction of this bit to out. */
- genconfig_shadow = ((genconfig_shadow &
- ~IO_MASK(R_GEN_CONFIG, g0dir)) |
- (IO_STATE(R_GEN_CONFIG, g0dir, out)));
- *R_GEN_CONFIG = genconfig_shadow;
+ if (cris_io_interface_allocate_pins(if_gpio_grp_a,
+ 'g',
+ CONFIG_ETRAX_DS1302_RSTBIT,
+ CONFIG_ETRAX_DS1302_RSTBIT)) {
+ printk(KERN_WARNING "ds1302: Failed to get IO interface\n");
+ return -1;
+ }
+
+ /* Set the direction of this bit to out. */
+ genconfig_shadow = ((genconfig_shadow &
+ ~IO_MASK(R_GEN_CONFIG, g0dir)) |
+ (IO_STATE(R_GEN_CONFIG, g0dir, out)));
+ *R_GEN_CONFIG = genconfig_shadow;
#endif
if (!ds1302_probe()) {
printk(KERN_WARNING "%s: RTC not found.\n", ds1302_name);
- return -1;
+ return -1;
}
#else
printk(KERN_WARNING "%s: RTC not found.\n", ds1302_name);
- return -1;
+ return -1;
#endif
}
/* Initialise trickle charger */