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authorStefan Reinauer <stefan.reinauer@coreboot.org>2016-03-11 20:22:28 -0800
committerStefan Reinauer <stefan.reinauer@coreboot.org>2016-04-19 18:34:18 +0200
commit86ddd732bd82b84724883b1f1579e18790611fe5 (patch)
treee52c4c88ceb7e14fd415031c56997d8c4054116e /src/drivers/pc80/mc146818rtc.c
parent3812597c668b795d4fc85578021e501f2a56f6b9 (diff)
downloadcoreboot-86ddd732bd82b84724883b1f1579e18790611fe5.tar.xz
kbuild: Allow drivers to fit src/drivers/[X]/[Y]/ scheme
Reorder drivers to fit src/drivers/[X]/[Y]/ scheme to make them pluggable. Also, fix up the following driver subdirectories by switching to the src/drivers/[X]/[Y]/ scheme as these are hard requirements for the main change: * drivers/intel * drivers/pc80 * drivers/dec Change-Id: I455d3089a317181d5b99bf658df759ec728a5f6b Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-on: https://review.coreboot.org/14047 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/drivers/pc80/mc146818rtc.c')
-rw-r--r--src/drivers/pc80/mc146818rtc.c397
1 files changed, 0 insertions, 397 deletions
diff --git a/src/drivers/pc80/mc146818rtc.c b/src/drivers/pc80/mc146818rtc.c
deleted file mode 100644
index 6c39f812b9..0000000000
--- a/src/drivers/pc80/mc146818rtc.c
+++ /dev/null
@@ -1,397 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright 2014 The Chromium OS Authors. All rights reserved.
- * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
- *
- * 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; version 2 of the License.
- *
- * 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.
- */
-
-#include <arch/acpi.h>
-#include <bcd.h>
-#include <stdint.h>
-#include <version.h>
-#include <console/console.h>
-#include <pc80/mc146818rtc.h>
-#include <boot/coreboot_tables.h>
-#include <rtc.h>
-#include <string.h>
-#include <cbfs.h>
-
-/* There's no way around this include guard. option_table.h is autogenerated */
-#if CONFIG_USE_OPTION_TABLE
-#include "option_table.h"
-#else
-#define LB_CKS_RANGE_START 0
-#define LB_CKS_RANGE_END 0
-#define LB_CKS_LOC 0
-#endif
-
-#include <smp/spinlock.h>
-
-#if (defined(__PRE_RAM__) && \
-IS_ENABLED(CONFIG_HAVE_ROMSTAGE_NVRAM_CBFS_SPINLOCK))
- #define LOCK_NVRAM_CBFS_SPINLOCK spin_lock(romstage_nvram_cbfs_lock());
- #define UNLOCK_NVRAM_CBFS_SPINLOCK spin_unlock(romstage_nvram_cbfs_lock());
-#else
- #define LOCK_NVRAM_CBFS_SPINLOCK
- #define UNLOCK_NVRAM_CBFS_SPINLOCK
-#endif
-
-static void cmos_reset_date(void)
-{
- /* Now setup a default date equals to the build date */
- struct rtc_time time = {
- .sec = 0,
- .min = 0,
- .hour = 1,
- .mday = bcd2bin(coreboot_build_date.day),
- .mon = bcd2bin(coreboot_build_date.month),
- .year = (bcd2bin(coreboot_build_date.century) * 100) +
- bcd2bin(coreboot_build_date.year),
- .wday = bcd2bin(coreboot_build_date.weekday)
- };
- rtc_set(&time);
-}
-
-static int cmos_checksum_valid(int range_start, int range_end, int cks_loc)
-{
- if (IS_ENABLED(CONFIG_STATIC_OPTION_TABLE))
- return 1;
-
- 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 cmos_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);
-}
-
-#define RTC_CONTROL_DEFAULT (RTC_24H)
-#define RTC_FREQ_SELECT_DEFAULT (RTC_REF_CLCK_32KHZ | RTC_RATE_1024HZ)
-
-#ifndef __SMM__
-void cmos_init(bool invalid)
-{
- bool cmos_invalid = invalid;
- bool checksum_invalid = false;
- bool clear_cmos;
- size_t i;
- uint8_t x;
-
-#ifndef __PRE_RAM__
- /*
- * Avoid clearing pending interrupts and resetting the RTC control
- * register in the resume path because the Linux kernel relies on
- * this to know if it should restart the RTC timer queue if the wake
- * was due to the RTC alarm.
- */
- if (acpi_is_wakeup_s3())
- return;
-#endif /* __PRE_RAM__ */
-
- printk(BIOS_DEBUG, "RTC Init\n");
-
- if (IS_ENABLED(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 = !cmos_checksum_valid(PC_CKS_RANGE_START,
- PC_CKS_RANGE_END, PC_CKS_LOC);
-
- clear_cmos = false;
- } else {
- clear_cmos = true;
- }
-
- if (invalid || cmos_invalid || checksum_invalid) {
- if (clear_cmos) {
- cmos_write(0, 0x01);
- cmos_write(0, 0x03);
- cmos_write(0, 0x05);
- for (i = 10; i < 128; i++)
- cmos_write(0, i);
- }
-
- if (cmos_invalid)
- cmos_reset_date();
-
- printk(BIOS_WARNING, "RTC:%s%s%s%s\n",
- invalid ? " Clear requested":"",
- cmos_invalid ? " Power Problem":"",
- checksum_invalid ? " Checksum invalid":"",
- clear_cmos ? " zeroing cmos":"");
- }
-
- /* 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);
- /* Ensure all reserved bits are 0 in register D */
- cmos_write(RTC_VRT, RTC_VALID);
-
- if (IS_ENABLED(CONFIG_USE_OPTION_TABLE)) {
- /* See if there is a LB CMOS checksum error */
- checksum_invalid = !cmos_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 */
- cmos_set_checksum(PC_CKS_RANGE_START, PC_CKS_RANGE_END, PC_CKS_LOC);
- }
-
- /* Clear any pending interrupts */
- cmos_read(RTC_INTR_FLAGS);
-}
-#endif /* __SMM__ */
-
-
-/*
- * 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
- * returns CB_SUCCESS = successful, cb_err code if an error occurred
- */
-static enum cb_err 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 CB_SUCCESS;
-}
-
-enum cb_err get_option(void *dest, const char *name)
-{
- struct cmos_option_table *ct;
- struct cmos_entries *ce;
- size_t namelen;
- int found = 0;
-
- if (!IS_ENABLED(CONFIG_USE_OPTION_TABLE))
- return CB_CMOS_OTABLE_DISABLED;
-
- LOCK_NVRAM_CBFS_SPINLOCK
-
- /* Figure out how long name is */
- namelen = strnlen(name, CMOS_MAX_NAME_LENGTH);
-
- /* find the requested entry record */
- ct = cbfs_boot_map_with_leak("cmos_layout.bin",
- CBFS_COMPONENT_CMOS_LAYOUT, NULL);
- if (!ct) {
- printk(BIOS_ERR, "RTC: cmos_layout.bin could not be found. "
- "Options are disabled\n");
-
- UNLOCK_NVRAM_CBFS_SPINLOCK
- return CB_CMOS_LAYOUT_NOT_FOUND;
- }
- 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);
- UNLOCK_NVRAM_CBFS_SPINLOCK
- return CB_CMOS_OPTION_NOT_FOUND;
- }
-
- if (get_cmos_value(ce->bit, ce->length, dest) != CB_SUCCESS) {
- UNLOCK_NVRAM_CBFS_SPINLOCK
- return CB_CMOS_ACCESS_ERROR;
- }
- if (!cmos_checksum_valid(LB_CKS_RANGE_START, LB_CKS_RANGE_END, LB_CKS_LOC)) {
- UNLOCK_NVRAM_CBFS_SPINLOCK
- return CB_CMOS_CHECKSUM_INVALID;
- }
- UNLOCK_NVRAM_CBFS_SPINLOCK
- return CB_SUCCESS;
-}
-
-static enum cb_err 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 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 CB_ERR_ARG;
-
- 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) {
- cmos_set_checksum(LB_CKS_RANGE_START, LB_CKS_RANGE_END,
- LB_CKS_LOC);
- }
- return CB_SUCCESS;
-}
-
-
-enum cb_err 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;
-
- if (!IS_ENABLED(CONFIG_USE_OPTION_TABLE))
- return CB_CMOS_OTABLE_DISABLED;
-
- /* Figure out how long name is */
- namelen = strnlen(name, CMOS_MAX_NAME_LENGTH);
-
- /* find the requested entry record */
- ct = cbfs_boot_map_with_leak("cmos_layout.bin",
- CBFS_COMPONENT_CMOS_LAYOUT, NULL);
- if (!ct) {
- printk(BIOS_ERR, "cmos_layout.bin could not be found. "
- "Options are disabled\n");
- return CB_CMOS_LAYOUT_NOT_FOUND;
- }
- 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 CB_CMOS_OPTION_NOT_FOUND;
- }
-
- 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})
- != CB_SUCCESS)
- return (CB_CMOS_ACCESS_ERROR);
- }
-
- if (set_cmos_value(ce->bit, length, value) != CB_SUCCESS)
- return (CB_CMOS_ACCESS_ERROR);
-
- return CB_SUCCESS;
-}
-
-/*
- * If the CMOS is cleared, the rtc_reg has the invalid date. That
- * hurts some OSes. Even if we don't set USE_OPTION_TABLE, we need
- * to make sure the date is valid.
- */
-void cmos_check_update_date()
-{
- u8 year, century;
-
- /* Assume hardware always supports RTC_CLK_ALTCENTURY. */
- century = cmos_read(RTC_CLK_ALTCENTURY);
- year = cmos_read(RTC_CLK_YEAR);
-
- /*
- * TODO: If century is 0xFF, 100% that the cmos is cleared.
- * Other than that, so far rtc_year is the only entry to check
- * if the date is valid.
- */
- if (century > 0x99 || year > 0x99) /* Invalid date */
- cmos_reset_date();
-}
-
-int rtc_set(const struct rtc_time *time){
- cmos_write(bin2bcd(time->sec), RTC_CLK_SECOND);
- cmos_write(bin2bcd(time->min), RTC_CLK_MINUTE);
- cmos_write(bin2bcd(time->hour), RTC_CLK_HOUR);
- cmos_write(bin2bcd(time->mday), RTC_CLK_DAYOFMONTH);
- cmos_write(bin2bcd(time->mon), RTC_CLK_MONTH);
- cmos_write(bin2bcd(time->year % 100), RTC_CLK_YEAR);
- /* Same assumption as above: We always have RTC_CLK_ALTCENTURY */
- cmos_write(bin2bcd(time->year / 100), RTC_CLK_ALTCENTURY);
- cmos_write(bin2bcd(time->wday + 1), RTC_CLK_DAYOFWEEK);
- return 0;
-}
-
-int rtc_get(struct rtc_time *time)
-{
- time->sec = bcd2bin(cmos_read(RTC_CLK_SECOND));
- time->min = bcd2bin(cmos_read(RTC_CLK_MINUTE));
- time->hour = bcd2bin(cmos_read(RTC_CLK_HOUR));
- time->mday = bcd2bin(cmos_read(RTC_CLK_DAYOFMONTH));
- time->mon = bcd2bin(cmos_read(RTC_CLK_MONTH));
- time->year = bcd2bin(cmos_read(RTC_CLK_YEAR));
- /* Same assumption as above: We always have RTC_CLK_ALTCENTURY */
- time->year += bcd2bin(cmos_read(RTC_CLK_ALTCENTURY)) * 100;
- time->wday = bcd2bin(cmos_read(RTC_CLK_DAYOFWEEK)) - 1;
- return 0;
-}