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authorStefan Reinauer <stefan.reinauer@coreboot.org>2012-04-27 02:31:28 +0200
committerStefan Reinauer <stefan.reinauer@coreboot.org>2012-04-27 19:23:16 +0200
commitae5e11d7cd7484343d277fb454fb19fdff34730d (patch)
tree231aede3dcf80242a4e68e2b4268835f4bf1c5c6 /src/pc80/mc146818rtc.c
parentaee1869fcf6c5eb1616f8c5c5a446c2b2de693e8 (diff)
Move top level pc80 directory to drivers/
There is no reason for this to be a top level directory. Some stuff from lib/ should also be moved to drivers/ Change-Id: I3c2d2e127f7215eadead029cfc7442c22b26814a Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/939 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/pc80/mc146818rtc.c')
-rw-r--r--src/pc80/mc146818rtc.c340
1 files changed, 0 insertions, 340 deletions
diff --git a/src/pc80/mc146818rtc.c b/src/pc80/mc146818rtc.c
deleted file mode 100644
index 99d670de42..0000000000
--- a/src/pc80/mc146818rtc.c
+++ /dev/null
@@ -1,340 +0,0 @@
-#include <stdint.h>
-#include <console/console.h>
-#include <pc80/mc146818rtc.h>
-#include <boot/coreboot_tables.h>
-#include <string.h>
-#if CONFIG_USE_OPTION_TABLE
-#include "option_table.h"
-#include <cbfs.h>
-#endif
-
-/* control registers - Moto names
- */
-#define RTC_REG_A 10
-#define RTC_REG_B 11
-#define RTC_REG_C 12
-#define RTC_REG_D 13
-
-
-/**********************************************************************
- * register details
- **********************************************************************/
-#define RTC_FREQ_SELECT RTC_REG_A
-
-/* update-in-progress - set to "1" 244 microsecs before RTC goes off the bus,
- * reset after update (may take 1.984ms @ 32768Hz RefClock) is complete,
- * totalling to a max high interval of 2.228 ms.
- */
-# define RTC_UIP 0x80
-# define RTC_DIV_CTL 0x70
- /* divider control: refclock values 4.194 / 1.049 MHz / 32.768 kHz */
-# define RTC_REF_CLCK_4MHZ 0x00
-# define RTC_REF_CLCK_1MHZ 0x10
-# define RTC_REF_CLCK_32KHZ 0x20
- /* 2 values for divider stage reset, others for "testing purposes only" */
-# define RTC_DIV_RESET1 0x60
-# define RTC_DIV_RESET2 0x70
- /* Periodic intr. / Square wave rate select. 0=none, 1=32.8kHz,... 15=2Hz */
-# define RTC_RATE_SELECT 0x0F
-# define RTC_RATE_NONE 0x00
-# define RTC_RATE_32786HZ 0x01
-# define RTC_RATE_16384HZ 0x02
-# define RTC_RATE_8192HZ 0x03
-# define RTC_RATE_4096HZ 0x04
-# define RTC_RATE_2048HZ 0x05
-# define RTC_RATE_1024HZ 0x06
-# define RTC_RATE_512HZ 0x07
-# define RTC_RATE_256HZ 0x08
-# define RTC_RATE_128HZ 0x09
-# define RTC_RATE_64HZ 0x0a
-# define RTC_RATE_32HZ 0x0b
-# define RTC_RATE_16HZ 0x0c
-# define RTC_RATE_8HZ 0x0d
-# define RTC_RATE_4HZ 0x0e
-# define RTC_RATE_2HZ 0x0f
-
-/**********************************************************************/
-#define RTC_CONTROL RTC_REG_B
-# define RTC_SET 0x80 /* disable updates for clock setting */
-# define RTC_PIE 0x40 /* periodic interrupt enable */
-# define RTC_AIE 0x20 /* alarm interrupt enable */
-# define RTC_UIE 0x10 /* update-finished interrupt enable */
-# define RTC_SQWE 0x08 /* enable square-wave output */
-# define RTC_DM_BINARY 0x04 /* all time/date values are BCD if clear */
-# define RTC_24H 0x02 /* 24 hour mode - else hours bit 7 means pm */
-# define RTC_DST_EN 0x01 /* auto switch DST - works f. USA only */
-
-/**********************************************************************/
-#define RTC_INTR_FLAGS RTC_REG_C
-/* caution - cleared by read */
-# define RTC_IRQF 0x80 /* any of the following 3 is active */
-# define RTC_PF 0x40
-# define RTC_AF 0x20
-# define RTC_UF 0x10
-
-/**********************************************************************/
-#define RTC_VALID RTC_REG_D
-# define RTC_VRT 0x80 /* valid RAM and time */
-/**********************************************************************/
-
-#if CONFIG_USE_OPTION_TABLE
-static int rtc_checksum_valid(int range_start, int range_end, int cks_loc)
-{
- int i;
- u16 sum, old_sum;
- sum = 0;
- for(i = range_start; i <= range_end; i++) {
- sum += cmos_read(i);
- }
- old_sum = ((cmos_read(cks_loc)<<8) | cmos_read(cks_loc+1))&0x0ffff;
- return sum == old_sum;
-}
-
-static void rtc_set_checksum(int range_start, int range_end, int cks_loc)
-{
- int i;
- u16 sum;
- sum = 0;
- for(i = range_start; i <= range_end; i++) {
- sum += cmos_read(i);
- }
- cmos_write(((sum >> 8) & 0x0ff), cks_loc);
- cmos_write(((sum >> 0) & 0x0ff), cks_loc+1);
-}
-#endif
-
-#if CONFIG_ARCH_X86
-#define RTC_CONTROL_DEFAULT (RTC_24H)
-#define RTC_FREQ_SELECT_DEFAULT (RTC_REF_CLCK_32KHZ | RTC_RATE_1024HZ)
-#else
-#if CONFIG_ARCH_ALPHA
-#define RTC_CONTROL_DEFAULT (RTC_SQWE | RTC_24H)
-#define RTC_FREQ_SELECT_DEFAULT (RTC_REF_CLCK_32KHZ | RTC_RATE_1024HZ)
-#endif
-#endif
-
-void rtc_init(int invalid)
-{
-#if CONFIG_USE_OPTION_TABLE
- unsigned char x;
- int cmos_invalid, checksum_invalid;
-#endif
-
- printk(BIOS_DEBUG, "RTC Init\n");
-
-#if CONFIG_USE_OPTION_TABLE
- /* See if there has been a CMOS power problem. */
- x = cmos_read(RTC_VALID);
- cmos_invalid = !(x & RTC_VRT);
-
- /* See if there is a CMOS checksum error */
- checksum_invalid = !rtc_checksum_valid(PC_CKS_RANGE_START,
- PC_CKS_RANGE_END,PC_CKS_LOC);
-
-#define CLEAR_CMOS 0
- if (invalid || cmos_invalid || checksum_invalid) {
- printk(BIOS_WARNING, "RTC:%s%s%s%s\n",
- invalid?" Clear requested":"",
- cmos_invalid?" Power Problem":"",
- checksum_invalid?" Checksum invalid":"",
- CLEAR_CMOS?" zeroing cmos":"");
-#if CLEAR_CMOS
- cmos_write(0, 0x01);
- cmos_write(0, 0x03);
- cmos_write(0, 0x05);
- for(i = 10; i < 48; i++) {
- cmos_write(0, i);
- }
-
- if (cmos_invalid) {
- /* Now setup a default date of Sat 1 January 2000 */
- cmos_write(0, 0x00); /* seconds */
- cmos_write(0, 0x02); /* minutes */
- cmos_write(1, 0x04); /* hours */
- cmos_write(7, 0x06); /* day of week */
- cmos_write(1, 0x07); /* day of month */
- cmos_write(1, 0x08); /* month */
- cmos_write(0, 0x09); /* year */
- }
-#endif
- }
-#endif
-
- /* Setup the real time clock */
- cmos_write(RTC_CONTROL_DEFAULT, RTC_CONTROL);
- /* Setup the frequency it operates at */
- cmos_write(RTC_FREQ_SELECT_DEFAULT, RTC_FREQ_SELECT);
-
-#if CONFIG_USE_OPTION_TABLE
- /* See if there is a LB CMOS checksum error */
- checksum_invalid = !rtc_checksum_valid(LB_CKS_RANGE_START,
- LB_CKS_RANGE_END,LB_CKS_LOC);
- if(checksum_invalid)
- printk(BIOS_DEBUG, "RTC: coreboot checksum invalid\n");
-
- /* Make certain we have a valid checksum */
- rtc_set_checksum(PC_CKS_RANGE_START,
- PC_CKS_RANGE_END,PC_CKS_LOC);
-#endif
-
- /* Clear any pending interrupts */
- (void) cmos_read(RTC_INTR_FLAGS);
-}
-
-
-#if CONFIG_USE_OPTION_TABLE
-/* This routine returns the value of the requested bits
- input bit = bit count from the beginning of the cmos image
- length = number of bits to include in the value
- ret = a character pointer to where the value is to be returned
- output the value placed in ret
- returns 0 = successful, -1 = an error occurred
-*/
-static int get_cmos_value(unsigned long bit, unsigned long length, void *vret)
-{
- unsigned char *ret;
- unsigned long byte,byte_bit;
- unsigned long i;
- unsigned char uchar;
-
- /* The table is checked when it is built to ensure all
- values are valid. */
- ret = vret;
- byte=bit/8; /* find the byte where the data starts */
- byte_bit=bit%8; /* find the bit in the byte where the data starts */
- if(length<9) { /* one byte or less */
- uchar = cmos_read(byte); /* load the byte */
- uchar >>= byte_bit; /* shift the bits to byte align */
- /* clear unspecified bits */
- ret[0] = uchar & ((1 << length) -1);
- }
- else { /* more that one byte so transfer the whole bytes */
- for(i=0;length;i++,length-=8,byte++) {
- /* load the byte */
- ret[i]=cmos_read(byte);
- }
- }
- return 0;
-}
-
-int get_option(void *dest, const char *name)
-{
- struct cmos_option_table *ct;
- struct cmos_entries *ce;
- size_t namelen;
- int found=0;
-
- /* Figure out how long name is */
- namelen = strnlen(name, CMOS_MAX_NAME_LENGTH);
-
- /* find the requested entry record */
- ct=cbfs_find_file("cmos_layout.bin", CBFS_COMPONENT_CMOS_LAYOUT);
- if (!ct) {
- printk(BIOS_ERR, "RTC: cmos_layout.bin could not be found. "
- "Options are disabled\n");
- return(-2);
- }
- ce=(struct cmos_entries*)((unsigned char *)ct + ct->header_length);
- for(;ce->tag==LB_TAG_OPTION;
- ce=(struct cmos_entries*)((unsigned char *)ce + ce->size)) {
- if (memcmp(ce->name, name, namelen) == 0) {
- found=1;
- break;
- }
- }
- if(!found) {
- printk(BIOS_DEBUG, "WARNING: No CMOS option '%s'.\n", name);
- return(-2);
- }
-
- if(get_cmos_value(ce->bit, ce->length, dest))
- return(-3);
- if(!rtc_checksum_valid(LB_CKS_RANGE_START,
- LB_CKS_RANGE_END,LB_CKS_LOC))
- return(-4);
- return(0);
-}
-
-static int set_cmos_value(unsigned long bit, unsigned long length, void *vret)
-{
- unsigned char *ret;
- unsigned long byte,byte_bit;
- unsigned long i;
- unsigned char uchar, mask;
- unsigned int chksum_update_needed = 0;
-
- ret = vret;
- byte = bit / 8; /* find the byte where the data starts */
- byte_bit = bit % 8; /* find the bit in the byte where the data starts */
- if(length <= 8) { /* one byte or less */
- mask = (1 << length) - 1;
- mask <<= byte_bit;
-
- uchar = cmos_read(byte);
- uchar &= ~mask;
- uchar |= (ret[0] << byte_bit);
- cmos_write(uchar, byte);
- if (byte >= LB_CKS_RANGE_START && byte <= LB_CKS_RANGE_END)
- chksum_update_needed = 1;
- } else { /* more that one byte so transfer the whole bytes */
- if (byte_bit || length % 8)
- return -1;
-
- for(i=0; length; i++, length-=8, byte++)
- cmos_write(ret[i], byte);
- if (byte >= LB_CKS_RANGE_START && byte <= LB_CKS_RANGE_END)
- chksum_update_needed = 1;
- }
-
- if (chksum_update_needed) {
- rtc_set_checksum(LB_CKS_RANGE_START,
- LB_CKS_RANGE_END,LB_CKS_LOC);
- }
- return 0;
-}
-
-
-int set_option(const char *name, void *value)
-{
- struct cmos_option_table *ct;
- struct cmos_entries *ce;
- unsigned long length;
- size_t namelen;
- int found=0;
-
- /* Figure out how long name is */
- namelen = strnlen(name, CMOS_MAX_NAME_LENGTH);
-
- /* find the requested entry record */
- ct=cbfs_find_file("cmos_layout.bin", CBFS_COMPONENT_CMOS_LAYOUT);
- if (!ct) {
- printk(BIOS_ERR, "cmos_layout.bin could not be found. Options are disabled\n");
- return(-2);
- }
- ce=(struct cmos_entries*)((unsigned char *)ct + ct->header_length);
- for(;ce->tag==LB_TAG_OPTION;
- ce=(struct cmos_entries*)((unsigned char *)ce + ce->size)) {
- if (memcmp(ce->name, name, namelen) == 0) {
- found=1;
- break;
- }
- }
- if(!found) {
- printk(BIOS_DEBUG, "WARNING: No CMOS option '%s'.\n", name);
- return(-2);
- }
-
- length = ce->length;
- if (ce->config == 's') {
- length = MAX(strlen((const char *)value) * 8, ce->length - 8);
- /* make sure the string is null terminated */
- if ((set_cmos_value(ce->bit + ce->length - 8, 8, &(u8[]){0})))
- return (-3);
- }
-
- if ((set_cmos_value(ce->bit, length, value)))
- return (-3);
-
- return 0;
-}
-#endif /* CONFIG_USE_OPTION_TABLE */