patch-2.4.20 linux-2.4.20/arch/ppc/kernel/pmac_nvram.c

• Lines: 403
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.19/arch/ppc/kernel/pmac_nvram.c
• Orig date: Mon Feb 25 11:37:55 2002

diff -urN linux-2.4.19/arch/ppc/kernel/pmac_nvram.c linux-2.4.20/arch/ppc/kernel/pmac_nvram.c
@@ -1,402 +0,0 @@
-/*
- * BK Id: SCCS/s.pmac_nvram.c 1.17 12/01/01 20:09:06 benh
- */
-/*
- * Miscellaneous procedures for dealing with the PowerMac hardware.
- */
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/stddef.h>
-#include <linux/nvram.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/delay.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>
-#include <linux/adb.h>
-#include <linux/pmu.h>
-
-#undef DEBUG
-
-#define NVRAM_SIZE		0x2000	/* 8kB of non-volatile RAM */
-
-#define CORE99_SIGNATURE	0x5a
-#define CORE99_ADLER_START	0x14
-
-/* Core99 nvram is a flash */
-#define CORE99_FLASH_STATUS_DONE	0x80
-#define CORE99_FLASH_STATUS_ERR		0x38
-#define CORE99_FLASH_CMD_ERASE_CONFIRM	0xd0
-#define CORE99_FLASH_CMD_ERASE_SETUP	0x20
-#define CORE99_FLASH_CMD_RESET		0xff
-#define CORE99_FLASH_CMD_WRITE_SETUP	0x40
-
-/* 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 int nvram_naddrs;
-static volatile unsigned char *nvram_addr;
-static volatile unsigned char *nvram_data;
-static int nvram_mult, is_core_99;
-static int core99_bank = 0;
-static int nvram_partitions[3];
-
-/* FIXME: kmalloc fails to allocate the image now that I had to move it
- *        before time_init(). For now, I allocate a static buffer here
- *        but it's a waste of space on all but core99 machines
- */
-#if 0
-static char* nvram_image;
-#else
-static char nvram_image[NVRAM_SIZE] __pmacdata;
-#endif
-
-extern int pmac_newworld;
-
-static u8 __openfirmware
-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 __pmac
-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 __pmac
-core99_check(u8* datas)
-{
-	struct core99_header* hdr99 = (struct core99_header*)datas;
-
-	if (hdr99->hdr.signature != CORE99_SIGNATURE) {
-#ifdef DEBUG
-		printk("Invalid signature\n");
-#endif		
-		return 0;
-	}
-	if (hdr99->hdr.cksum != chrp_checksum(&hdr99->hdr)) {
-#ifdef DEBUG
-		printk("Invalid checksum\n");
-#endif
-		return 0;
-	}
-	if (hdr99->adler != core99_calc_adler(datas)) {
-#ifdef DEBUG
-		printk("Invalid adler\n");
-#endif
-		return 0;
-	}
-	return hdr99->generation;
-}
-
-static int __pmac
-core99_erase_bank(int bank)
-{
-	int stat, i;
-	
-	u8* base = (u8 *)nvram_data + core99_bank*NVRAM_SIZE;
-	
-	out_8(base, CORE99_FLASH_CMD_ERASE_SETUP);
-	out_8(base, CORE99_FLASH_CMD_ERASE_CONFIRM);
-	do { stat = in_8(base); }
-	while(!(stat & CORE99_FLASH_STATUS_DONE));
-	out_8(base, CORE99_FLASH_CMD_RESET);
-	if (stat & CORE99_FLASH_STATUS_ERR) {
-		printk("nvram: flash error 0x%02x on erase !\n", stat);
-		return -ENXIO;
-	}
-	for (i=0; i<NVRAM_SIZE; i++)
-		if (base[i] != 0xff) {
-			printk("nvram: flash erase failed !\n");
-			return -ENXIO;
-		}
-	return 0;
-}
-
-static int __pmac
-core99_write_bank(int bank, u8* datas)
-{
-	int i, stat = 0;
-	
-	u8* base = (u8 *)nvram_data + core99_bank*NVRAM_SIZE;
-	
-	for (i=0; i<NVRAM_SIZE; i++) {
-		out_8(base+i, CORE99_FLASH_CMD_WRITE_SETUP);
-		out_8(base+i, datas[i]);
-		do { stat = in_8(base); }
-		while(!(stat & CORE99_FLASH_STATUS_DONE));
-		if (stat & CORE99_FLASH_STATUS_ERR)
-			break;
-	}
-	out_8(base, CORE99_FLASH_CMD_RESET);
-	if (stat & CORE99_FLASH_STATUS_ERR) {
-		printk("nvram: flash error 0x%02x on write !\n", stat);
-		return -ENXIO;
-	}
-	for (i=0; i<NVRAM_SIZE; i++)
-		if (base[i] != datas[i]) {
-			printk("nvram: flash write failed !\n");
-			return -ENXIO;
-		}
-	return 0;	
-}
-
-static void __init
-lookup_partitions(void)
-{
-	u8 buffer[17];
-	int i, offset;
-	struct chrp_header* hdr;
-
-	if (pmac_newworld) {
-		nvram_partitions[pmac_nvram_OF] = -1;
-		nvram_partitions[pmac_nvram_XPRAM] = -1;
-		nvram_partitions[pmac_nvram_NR] = -1;
-		hdr = (struct chrp_header *)buffer;
-	
-		offset = 0;
-		buffer[16] = 0;
-		do {
-			for (i=0;i<16;i++)
-				buffer[i] = nvram_read_byte(offset+i);
-			if (!strcmp(hdr->name, "common"))
-				nvram_partitions[pmac_nvram_OF] = offset + 0x10;
-			if (!strcmp(hdr->name, "APL,MacOS75")) {
-				nvram_partitions[pmac_nvram_XPRAM] = offset + 0x10;
-				nvram_partitions[pmac_nvram_NR] = offset + 0x110;
-			}
-			offset += (hdr->len * 0x10);
-		} while(offset < NVRAM_SIZE);
-	} else {
-		nvram_partitions[pmac_nvram_OF] = 0x1800;
-		nvram_partitions[pmac_nvram_XPRAM] = 0x1300;
-		nvram_partitions[pmac_nvram_NR] = 0x1400;
-	}	
-#ifdef DEBUG
-	printk("nvram: OF partition at 0x%x\n", nvram_partitions[pmac_nvram_OF]);
-	printk("nvram: XP partition at 0x%x\n", nvram_partitions[pmac_nvram_XPRAM]);
-	printk("nvram: NR partition at 0x%x\n", nvram_partitions[pmac_nvram_NR]);
-#endif	
-}
-
-void __init
-pmac_nvram_init(void)
-{
-	struct device_node *dp;
-
-	nvram_naddrs = 0;
-
-	dp = find_devices("nvram");
-	if (dp == NULL) {
-		printk(KERN_ERR "Can't find NVRAM device\n");
-		return;
-	}
-	nvram_naddrs = dp->n_addrs;
-	is_core_99 = device_is_compatible(dp, "nvram,flash");
-	if (is_core_99) {
-		int i;
-		u32 gen_bank0, gen_bank1;
-		
-		if (nvram_naddrs < 1) {
-			printk(KERN_ERR "nvram: no address\n");
-			return;
-		}
-#if 0
-		nvram_image = kmalloc(NVRAM_SIZE, GFP_KERNEL);
-		if (!nvram_image) {
-			printk(KERN_ERR "nvram: can't allocate image\n");
-			return;
-		}
-#endif
-		nvram_data = ioremap(dp->addrs[0].address, NVRAM_SIZE*2);
-#ifdef DEBUG
-		printk("nvram: Checking bank 0...\n");
-#endif
-		gen_bank0 = core99_check((u8 *)nvram_data);
-		gen_bank1 = core99_check((u8 *)nvram_data + NVRAM_SIZE);
-		core99_bank = (gen_bank0 < gen_bank1) ? 1 : 0;
-#ifdef DEBUG
-		printk("nvram: gen0=%d, gen1=%d\n", gen_bank0, gen_bank1);
-		printk("nvram: Active bank is: %d\n", core99_bank);
-#endif
-		for (i=0; i<NVRAM_SIZE; i++)
-			nvram_image[i] = nvram_data[i + core99_bank*NVRAM_SIZE];
-	} else if (_machine == _MACH_chrp && nvram_naddrs == 1) {
-		nvram_data = ioremap(dp->addrs[0].address + isa_mem_base,
-				     dp->addrs[0].size);
-		nvram_mult = 1;
-	} else if (nvram_naddrs == 1) {
-		nvram_data = ioremap(dp->addrs[0].address, dp->addrs[0].size);
-		nvram_mult = (dp->addrs[0].size + NVRAM_SIZE - 1) / NVRAM_SIZE;
-	} else if (nvram_naddrs == 2) {
-		nvram_addr = ioremap(dp->addrs[0].address, dp->addrs[0].size);
-		nvram_data = ioremap(dp->addrs[1].address, dp->addrs[1].size);
-	} else if (nvram_naddrs == 0 && sys_ctrler == SYS_CTRLER_PMU) {
-		nvram_naddrs = -1;
-	} else {
-		printk(KERN_ERR "Don't know how to access NVRAM with %d addresses\n",
-		       nvram_naddrs);
-	}
-	lookup_partitions();
-}
-
-void __pmac
-pmac_nvram_update(void)
-{
-	struct core99_header* hdr99;
-	
-	if (!is_core_99 || !nvram_data || !nvram_image)
-		return;
-	if (!memcmp(nvram_image, (u8*)nvram_data + core99_bank*NVRAM_SIZE,
-		NVRAM_SIZE))
-		return;
-#ifdef DEBUG
-	printk("Updating nvram...\n");
-#endif
-	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(core99_bank)) {
-		printk("nvram: Error erasing bank %d\n", core99_bank);
-		return;
-	}
-	if (core99_write_bank(core99_bank, nvram_image))
-		printk("nvram: Error writing bank %d\n", core99_bank);
-}
-
-unsigned char __openfirmware
-nvram_read_byte(int addr)
-{
-	switch (nvram_naddrs) {
-#ifdef CONFIG_ADB_PMU
-	case -1: {
-		struct adb_request req;
-
-		if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM,
-				(addr >> 8) & 0xff, addr & 0xff))
-			break;
-		while (!req.complete)
-			pmu_poll();
-		return req.reply[0];
-	}
-#endif
-	case 1:
-		if (is_core_99)
-			return nvram_image[addr];
-		return nvram_data[(addr & (NVRAM_SIZE - 1)) * nvram_mult];
-	case 2:
-		*nvram_addr = addr >> 5;
-		eieio();
-		return nvram_data[(addr & 0x1f) << 4];
-	}
-	return 0;
-}
-
-void __openfirmware
-nvram_write_byte(unsigned char val, int addr)
-{
-	switch (nvram_naddrs) {
-#ifdef CONFIG_ADB_PMU
-	case -1: {
-		struct adb_request req;
-
-		if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM,
-				(addr >> 8) & 0xff, addr & 0xff, val))
-			break;
-		while (!req.complete)
-			pmu_poll();
-		break;
-	}
-#endif
-	case 1:
-		if (is_core_99) {
-			nvram_image[addr] = val;
-			break;
-		}
-		nvram_data[(addr & (NVRAM_SIZE - 1)) * nvram_mult] = val;
-		break;
-	case 2:
-		*nvram_addr = addr >> 5;
-		eieio();
-		nvram_data[(addr & 0x1f) << 4] = val;
-		break;
-	}
-	eieio();
-}
-
-int __pmac
-pmac_get_partition(int partition)
-{
-	return nvram_partitions[partition];
-}
-
-u8 __pmac
-pmac_xpram_read(int xpaddr)
-{
-	int offset = nvram_partitions[pmac_nvram_XPRAM];
-	
-	if (offset < 0)
-		return 0;
-		
-	return nvram_read_byte(xpaddr + offset);
-}
-
-void __pmac
-pmac_xpram_write(int xpaddr, u8 data)
-{
-	int offset = nvram_partitions[pmac_nvram_XPRAM];
-	
-	if (offset < 0)
-		return;
-		
-	nvram_write_byte(xpaddr + offset, data);
-}