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Diffstat (limited to 'arch/ppc64/kernel/pmac_nvram.c')
-rw-r--r--arch/ppc64/kernel/pmac_nvram.c493
1 files changed, 0 insertions, 493 deletions
diff --git a/arch/ppc64/kernel/pmac_nvram.c b/arch/ppc64/kernel/pmac_nvram.c
deleted file mode 100644
index 5fe9785ad7d..00000000000
--- a/arch/ppc64/kernel/pmac_nvram.c
+++ /dev/null
@@ -1,493 +0,0 @@
-/*
- * arch/ppc/platforms/pmac_nvram.c
- *
- * Copyright (C) 2002 Benjamin Herrenschmidt (benh@kernel.crashing.org)
- *
- * 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 support for the OF persistent properties
- */
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/stddef.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/bootmem.h>
-#include <linux/completion.h>
-#include <linux/spinlock.h>
-#include <asm/sections.h>
-#include <asm/io.h>
-#include <asm/system.h>
-#include <asm/prom.h>
-#include <asm/machdep.h>
-#include <asm/nvram.h>
-
-#define DEBUG
-
-#ifdef DEBUG
-#define DBG(x...) printk(x)
-#else
-#define DBG(x...)
-#endif
-
-#define NVRAM_SIZE 0x2000 /* 8kB of non-volatile RAM */
-
-#define CORE99_SIGNATURE 0x5a
-#define CORE99_ADLER_START 0x14
-
-/* On Core99, nvram is either a sharp, a micron or an AMD flash */
-#define SM_FLASH_STATUS_DONE 0x80
-#define SM_FLASH_STATUS_ERR 0x38
-
-#define SM_FLASH_CMD_ERASE_CONFIRM 0xd0
-#define SM_FLASH_CMD_ERASE_SETUP 0x20
-#define SM_FLASH_CMD_RESET 0xff
-#define SM_FLASH_CMD_WRITE_SETUP 0x40
-#define SM_FLASH_CMD_CLEAR_STATUS 0x50
-#define SM_FLASH_CMD_READ_STATUS 0x70
-
-/* CHRP NVRAM header */
-struct chrp_header {
- u8 signature;
- u8 cksum;
- u16 len;
- char name[12];
- u8 data[0];
-};
-
-struct core99_header {
- struct chrp_header hdr;
- u32 adler;
- u32 generation;
- u32 reserved[2];
-};
-
-/*
- * Read and write the non-volatile RAM on PowerMacs and CHRP machines.
- */
-static volatile unsigned char *nvram_data;
-static int core99_bank = 0;
-// XXX Turn that into a sem
-static DEFINE_SPINLOCK(nv_lock);
-
-extern int system_running;
-
-static int (*core99_write_bank)(int bank, u8* datas);
-static int (*core99_erase_bank)(int bank);
-
-static char *nvram_image;
-
-
-static ssize_t core99_nvram_read(char *buf, size_t count, loff_t *index)
-{
- int i;
-
- if (nvram_image == NULL)
- return -ENODEV;
- if (*index > NVRAM_SIZE)
- return 0;
-
- i = *index;
- if (i + count > NVRAM_SIZE)
- count = NVRAM_SIZE - i;
-
- memcpy(buf, &nvram_image[i], count);
- *index = i + count;
- return count;
-}
-
-static ssize_t core99_nvram_write(char *buf, size_t count, loff_t *index)
-{
- int i;
-
- if (nvram_image == NULL)
- return -ENODEV;
- if (*index > NVRAM_SIZE)
- return 0;
-
- i = *index;
- if (i + count > NVRAM_SIZE)
- count = NVRAM_SIZE - i;
-
- memcpy(&nvram_image[i], buf, count);
- *index = i + count;
- return count;
-}
-
-static ssize_t core99_nvram_size(void)
-{
- if (nvram_image == NULL)
- return -ENODEV;
- return NVRAM_SIZE;
-}
-
-static u8 chrp_checksum(struct chrp_header* hdr)
-{
- u8 *ptr;
- u16 sum = hdr->signature;
- for (ptr = (u8 *)&hdr->len; ptr < hdr->data; ptr++)
- sum += *ptr;
- while (sum > 0xFF)
- sum = (sum & 0xFF) + (sum>>8);
- return sum;
-}
-
-static u32 core99_calc_adler(u8 *buffer)
-{
- int cnt;
- u32 low, high;
-
- buffer += CORE99_ADLER_START;
- low = 1;
- high = 0;
- for (cnt=0; cnt<(NVRAM_SIZE-CORE99_ADLER_START); cnt++) {
- if ((cnt % 5000) == 0) {
- high %= 65521UL;
- high %= 65521UL;
- }
- low += buffer[cnt];
- high += low;
- }
- low %= 65521UL;
- high %= 65521UL;
-
- return (high << 16) | low;
-}
-
-static u32 core99_check(u8* datas)
-{
- struct core99_header* hdr99 = (struct core99_header*)datas;
-
- if (hdr99->hdr.signature != CORE99_SIGNATURE) {
- DBG("Invalid signature\n");
- return 0;
- }
- if (hdr99->hdr.cksum != chrp_checksum(&hdr99->hdr)) {
- DBG("Invalid checksum\n");
- return 0;
- }
- if (hdr99->adler != core99_calc_adler(datas)) {
- DBG("Invalid adler\n");
- return 0;
- }
- return hdr99->generation;
-}
-
-static int sm_erase_bank(int bank)
-{
- int stat, i;
- unsigned long timeout;
-
- u8* base = (u8 *)nvram_data + core99_bank*NVRAM_SIZE;
-
- DBG("nvram: Sharp/Micron Erasing bank %d...\n", bank);
-
- out_8(base, SM_FLASH_CMD_ERASE_SETUP);
- out_8(base, SM_FLASH_CMD_ERASE_CONFIRM);
- timeout = 0;
- do {
- if (++timeout > 1000000) {
- printk(KERN_ERR "nvram: Sharp/Miron flash erase timeout !\n");
- break;
- }
- out_8(base, SM_FLASH_CMD_READ_STATUS);
- stat = in_8(base);
- } while (!(stat & SM_FLASH_STATUS_DONE));
-
- out_8(base, SM_FLASH_CMD_CLEAR_STATUS);
- out_8(base, SM_FLASH_CMD_RESET);
-
- for (i=0; i<NVRAM_SIZE; i++)
- if (base[i] != 0xff) {
- printk(KERN_ERR "nvram: Sharp/Micron flash erase failed !\n");
- return -ENXIO;
- }
- return 0;
-}
-
-static int sm_write_bank(int bank, u8* datas)
-{
- int i, stat = 0;
- unsigned long timeout;
-
- u8* base = (u8 *)nvram_data + core99_bank*NVRAM_SIZE;
-
- DBG("nvram: Sharp/Micron Writing bank %d...\n", bank);
-
- for (i=0; i<NVRAM_SIZE; i++) {
- out_8(base+i, SM_FLASH_CMD_WRITE_SETUP);
- udelay(1);
- out_8(base+i, datas[i]);
- timeout = 0;
- do {
- if (++timeout > 1000000) {
- printk(KERN_ERR "nvram: Sharp/Micron flash write timeout !\n");
- break;
- }
- out_8(base, SM_FLASH_CMD_READ_STATUS);
- stat = in_8(base);
- } while (!(stat & SM_FLASH_STATUS_DONE));
- if (!(stat & SM_FLASH_STATUS_DONE))
- break;
- }
- out_8(base, SM_FLASH_CMD_CLEAR_STATUS);
- out_8(base, SM_FLASH_CMD_RESET);
- for (i=0; i<NVRAM_SIZE; i++)
- if (base[i] != datas[i]) {
- printk(KERN_ERR "nvram: Sharp/Micron flash write failed !\n");
- return -ENXIO;
- }
- return 0;
-}
-
-static int amd_erase_bank(int bank)
-{
- int i, stat = 0;
- unsigned long timeout;
-
- u8* base = (u8 *)nvram_data + core99_bank*NVRAM_SIZE;
-
- DBG("nvram: AMD Erasing bank %d...\n", bank);
-
- /* Unlock 1 */
- out_8(base+0x555, 0xaa);
- udelay(1);
- /* Unlock 2 */
- out_8(base+0x2aa, 0x55);
- udelay(1);
-
- /* Sector-Erase */
- out_8(base+0x555, 0x80);
- udelay(1);
- out_8(base+0x555, 0xaa);
- udelay(1);
- out_8(base+0x2aa, 0x55);
- udelay(1);
- out_8(base, 0x30);
- udelay(1);
-
- timeout = 0;
- do {
- if (++timeout > 1000000) {
- printk(KERN_ERR "nvram: AMD flash erase timeout !\n");
- break;
- }
- stat = in_8(base) ^ in_8(base);
- } while (stat != 0);
-
- /* Reset */
- out_8(base, 0xf0);
- udelay(1);
-
- for (i=0; i<NVRAM_SIZE; i++)
- if (base[i] != 0xff) {
- printk(KERN_ERR "nvram: AMD flash erase failed !\n");
- return -ENXIO;
- }
- return 0;
-}
-
-static int amd_write_bank(int bank, u8* datas)
-{
- int i, stat = 0;
- unsigned long timeout;
-
- u8* base = (u8 *)nvram_data + core99_bank*NVRAM_SIZE;
-
- DBG("nvram: AMD Writing bank %d...\n", bank);
-
- for (i=0; i<NVRAM_SIZE; i++) {
- /* Unlock 1 */
- out_8(base+0x555, 0xaa);
- udelay(1);
- /* Unlock 2 */
- out_8(base+0x2aa, 0x55);
- udelay(1);
-
- /* Write single word */
- out_8(base+0x555, 0xa0);
- udelay(1);
- out_8(base+i, datas[i]);
-
- timeout = 0;
- do {
- if (++timeout > 1000000) {
- printk(KERN_ERR "nvram: AMD flash write timeout !\n");
- break;
- }
- stat = in_8(base) ^ in_8(base);
- } while (stat != 0);
- if (stat != 0)
- break;
- }
-
- /* Reset */
- out_8(base, 0xf0);
- udelay(1);
-
- for (i=0; i<NVRAM_SIZE; i++)
- if (base[i] != datas[i]) {
- printk(KERN_ERR "nvram: AMD flash write failed !\n");
- return -ENXIO;
- }
- return 0;
-}
-
-
-static void core99_nvram_sync(void)
-{
- struct core99_header* hdr99;
- unsigned long flags;
-
- spin_lock_irqsave(&nv_lock, flags);
- if (!memcmp(nvram_image, (u8*)nvram_data + core99_bank*NVRAM_SIZE,
- NVRAM_SIZE))
- goto bail;
-
- DBG("Updating nvram...\n");
-
- hdr99 = (struct core99_header*)nvram_image;
- hdr99->generation++;
- hdr99->hdr.signature = CORE99_SIGNATURE;
- hdr99->hdr.cksum = chrp_checksum(&hdr99->hdr);
- hdr99->adler = core99_calc_adler(nvram_image);
- core99_bank = core99_bank ? 0 : 1;
- if (core99_erase_bank)
- if (core99_erase_bank(core99_bank)) {
- printk("nvram: Error erasing bank %d\n", core99_bank);
- goto bail;
- }
- if (core99_write_bank)
- if (core99_write_bank(core99_bank, nvram_image))
- printk("nvram: Error writing bank %d\n", core99_bank);
- bail:
- spin_unlock_irqrestore(&nv_lock, flags);
-}
-
-int __init pmac_nvram_init(void)
-{
- struct device_node *dp;
- u32 gen_bank0, gen_bank1;
- int i;
-
- dp = find_devices("nvram");
- if (dp == NULL) {
- printk(KERN_ERR "Can't find NVRAM device\n");
- return -ENODEV;
- }
- if (!device_is_compatible(dp, "nvram,flash")) {
- printk(KERN_ERR "Incompatible type of NVRAM\n");
- return -ENXIO;
- }
-
- nvram_image = alloc_bootmem(NVRAM_SIZE);
- if (nvram_image == NULL) {
- printk(KERN_ERR "nvram: can't allocate ram image\n");
- return -ENOMEM;
- }
- nvram_data = ioremap(dp->addrs[0].address, NVRAM_SIZE*2);
-
- DBG("nvram: Checking bank 0...\n");
-
- gen_bank0 = core99_check((u8 *)nvram_data);
- gen_bank1 = core99_check((u8 *)nvram_data + NVRAM_SIZE);
- core99_bank = (gen_bank0 < gen_bank1) ? 1 : 0;
-
- DBG("nvram: gen0=%d, gen1=%d\n", gen_bank0, gen_bank1);
- DBG("nvram: Active bank is: %d\n", core99_bank);
-
- for (i=0; i<NVRAM_SIZE; i++)
- nvram_image[i] = nvram_data[i + core99_bank*NVRAM_SIZE];
-
- ppc_md.nvram_read = core99_nvram_read;
- ppc_md.nvram_write = core99_nvram_write;
- ppc_md.nvram_size = core99_nvram_size;
- ppc_md.nvram_sync = core99_nvram_sync;
-
- /*
- * Maybe we could be smarter here though making an exclusive list
- * of known flash chips is a bit nasty as older OF didn't provide us
- * with a useful "compatible" entry. A solution would be to really
- * identify the chip using flash id commands and base ourselves on
- * a list of known chips IDs
- */
- if (device_is_compatible(dp, "amd-0137")) {
- core99_erase_bank = amd_erase_bank;
- core99_write_bank = amd_write_bank;
- } else {
- core99_erase_bank = sm_erase_bank;
- core99_write_bank = sm_write_bank;
- }
-
- return 0;
-}
-
-int pmac_get_partition(int partition)
-{
- struct nvram_partition *part;
- const char *name;
- int sig;
-
- switch(partition) {
- case pmac_nvram_OF:
- name = "common";
- sig = NVRAM_SIG_SYS;
- break;
- case pmac_nvram_XPRAM:
- name = "APL,MacOS75";
- sig = NVRAM_SIG_OS;
- break;
- case pmac_nvram_NR:
- default:
- /* Oldworld stuff */
- return -ENODEV;
- }
-
- part = nvram_find_partition(sig, name);
- if (part == NULL)
- return 0;
-
- return part->index;
-}
-
-u8 pmac_xpram_read(int xpaddr)
-{
- int offset = pmac_get_partition(pmac_nvram_XPRAM);
- loff_t index;
- u8 buf;
- ssize_t count;
-
- if (offset < 0 || xpaddr < 0 || xpaddr > 0x100)
- return 0xff;
- index = offset + xpaddr;
-
- count = ppc_md.nvram_read(&buf, 1, &index);
- if (count != 1)
- return 0xff;
- return buf;
-}
-
-void pmac_xpram_write(int xpaddr, u8 data)
-{
- int offset = pmac_get_partition(pmac_nvram_XPRAM);
- loff_t index;
- u8 buf;
-
- if (offset < 0 || xpaddr < 0 || xpaddr > 0x100)
- return;
- index = offset + xpaddr;
- buf = data;
-
- ppc_md.nvram_write(&buf, 1, &index);
-}
-
-EXPORT_SYMBOL(pmac_get_partition);
-EXPORT_SYMBOL(pmac_xpram_read);
-EXPORT_SYMBOL(pmac_xpram_write);
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