patch-2.4.21 linux-2.4.21/drivers/mtd/maps/nettel.c

• Lines: 552
• Date: 2003-06-13 07:51:34.000000000 -0700
• Orig file: linux-2.4.20/drivers/mtd/maps/nettel.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.20/drivers/mtd/maps/nettel.c linux-2.4.21/drivers/mtd/maps/nettel.c
@@ -0,0 +1,551 @@
+/****************************************************************************/
+
+/*
+ *      nettel.c -- mappings for NETtel/SecureEdge/SnapGear (x86) boards.
+ *
+ *      (C) Copyright 2000-2001, Greg Ungerer (gerg@snapgear.com)
+ *      (C) Copyright 2001-2002, SnapGear (www.snapgear.com)
+ *
+ *	$Id: nettel.c,v 1.1 2002/08/08 06:30:13 gerg Exp $
+ */
+
+/****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/cfi.h>
+#include <linux/reboot.h>
+#include <asm/io.h>
+
+/****************************************************************************/
+
+#define INTEL_BUSWIDTH		1
+#define AMD_WINDOW_MAXSIZE	0x00200000
+#define AMD_BUSWIDTH	 	1
+
+/*
+ *	PAR masks and shifts, assuming 64K pages.
+ */
+#define SC520_PAR_ADDR_MASK	0x00003fff
+#define SC520_PAR_ADDR_SHIFT	16
+#define SC520_PAR_TO_ADDR(par) \
+	(((par)&SC520_PAR_ADDR_MASK) << SC520_PAR_ADDR_SHIFT)
+
+#define SC520_PAR_SIZE_MASK	0x01ffc000
+#define SC520_PAR_SIZE_SHIFT	2
+#define SC520_PAR_TO_SIZE(par) \
+	((((par)&SC520_PAR_SIZE_MASK) << SC520_PAR_SIZE_SHIFT) + (64*1024))
+
+#define SC520_PAR(cs, addr, size) \
+	((cs) | \
+	((((size)-(64*1024)) >> SC520_PAR_SIZE_SHIFT) & SC520_PAR_SIZE_MASK) | \
+	(((addr) >> SC520_PAR_ADDR_SHIFT) & SC520_PAR_ADDR_MASK))
+
+#define SC520_PAR_BOOTCS	0x8a000000
+#define	SC520_PAR_ROMCS1	0xaa000000
+#define SC520_PAR_ROMCS2	0xca000000	/* Cache disabled, 64K page */
+
+static void *nettel_mmcrp = NULL;
+
+#ifdef CONFIG_MTD_CFI_INTELEXT
+static struct mtd_info *intel_mtd;
+#endif
+static struct mtd_info *amd_mtd;
+
+/****************************************************************************/
+
+static __u8 nettel_read8(struct map_info *map, unsigned long ofs)
+{
+	return(readb(map->map_priv_1 + ofs));
+}
+
+static __u16 nettel_read16(struct map_info *map, unsigned long ofs)
+{
+	return(readw(map->map_priv_1 + ofs));
+}
+
+static __u32 nettel_read32(struct map_info *map, unsigned long ofs)
+{
+	return(readl(map->map_priv_1 + ofs));
+}
+
+static void nettel_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+	memcpy_fromio(to, map->map_priv_1 + from, len);
+}
+
+static void nettel_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+	writeb(d, map->map_priv_1 + adr);
+}
+
+static void nettel_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+	writew(d, map->map_priv_1 + adr);
+}
+
+static void nettel_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+	writel(d, map->map_priv_1 + adr);
+}
+
+static void nettel_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+	memcpy_toio(map->map_priv_1 + to, from, len);
+}
+
+/****************************************************************************/
+
+#ifdef CONFIG_MTD_CFI_INTELEXT
+static struct map_info nettel_intel_map = {
+	name: "SnapGear Intel",
+	size: 0,
+	buswidth: INTEL_BUSWIDTH,
+	read8: nettel_read8,
+	read16: nettel_read16,
+	read32: nettel_read32,
+	copy_from: nettel_copy_from,
+	write8: nettel_write8,
+	write16: nettel_write16,
+	write32: nettel_write32,
+	copy_to: nettel_copy_to
+};
+
+static struct mtd_partition nettel_intel_partitions[] = {
+	{
+		name: "SnapGear kernel",
+		offset: 0,
+		size: 0x000e0000
+	},
+	{
+		name: "SnapGear filesystem",
+		offset: 0x00100000,
+	},
+	{
+		name: "SnapGear config",
+		offset: 0x000e0000,
+		size: 0x00020000
+	},
+	{
+		name: "SnapGear Intel",
+		offset: 0
+	},
+	{
+		name: "SnapGear BIOS Config",
+		offset: 0x007e0000,
+		size: 0x00020000
+	},
+	{
+		name: "SnapGear BIOS",
+		offset: 0x007e0000,
+		size: 0x00020000
+	},
+};
+#endif
+
+static struct map_info nettel_amd_map = {
+	name: "SnapGear AMD",
+	size: AMD_WINDOW_MAXSIZE,
+	buswidth: AMD_BUSWIDTH,
+	read8: nettel_read8,
+	read16: nettel_read16,
+	read32: nettel_read32,
+	copy_from: nettel_copy_from,
+	write8: nettel_write8,
+	write16: nettel_write16,
+	write32: nettel_write32,
+	copy_to: nettel_copy_to
+};
+
+static struct mtd_partition nettel_amd_partitions[] = {
+	{
+		name: "SnapGear BIOS config",
+		offset: 0x000e0000,
+		size: 0x00010000
+	},
+	{
+		name: "SnapGear BIOS",
+		offset: 0x000f0000,
+		size: 0x00010000
+	},
+	{
+		name: "SnapGear AMD",
+		offset: 0
+	},
+	{
+		name: "SnapGear high BIOS",
+		offset: 0x001f0000,
+		size: 0x00010000
+	}
+};
+
+#define NUM_AMD_PARTITIONS \
+	(sizeof(nettel_amd_partitions)/sizeof(nettel_amd_partitions[0]))
+
+/****************************************************************************/
+
+#ifdef CONFIG_MTD_CFI_INTELEXT
+
+/*
+ *	Set the Intel flash back to read mode since some old boot
+ *	loaders don't.
+ */
+static int nettel_reboot_notifier(struct notifier_block *nb, unsigned long val, void *v)
+{
+	struct cfi_private *cfi = nettel_intel_map.fldrv_priv;
+	unsigned long b;
+	
+	/* Make sure all FLASH chips are put back into read mode */
+	for (b = 0; (b < nettel_intel_partitions[3].size); b += 0x100000) {
+		cfi_send_gen_cmd(0xff, 0x55, b, &nettel_intel_map, cfi,
+			cfi->device_type, NULL);
+	}
+	return(NOTIFY_OK);
+}
+
+static struct notifier_block nettel_notifier_block = {
+	nettel_reboot_notifier, NULL, 0
+};
+
+/*
+ *	Erase the configuration file system.
+ *	Used to support the software reset button.
+ */
+static void nettel_erasecallback(struct erase_info *done)
+{
+	wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
+	wake_up(wait_q);
+}
+
+static struct erase_info nettel_erase;
+
+int nettel_eraseconfig(void)
+{
+	struct mtd_info *mtd;
+	DECLARE_WAITQUEUE(wait, current);
+	wait_queue_head_t wait_q;
+	int ret;
+
+	init_waitqueue_head(&wait_q);
+	mtd = get_mtd_device(NULL, 2);
+	if (mtd) {
+		nettel_erase.mtd = mtd;
+		nettel_erase.callback = nettel_erasecallback;
+		nettel_erase.callback = 0;
+		nettel_erase.addr = 0;
+		nettel_erase.len = mtd->size;
+		nettel_erase.priv = (u_long) &wait_q;
+		nettel_erase.priv = 0;
+
+		set_current_state(TASK_INTERRUPTIBLE);
+		add_wait_queue(&wait_q, &wait);
+
+		ret = MTD_ERASE(mtd, &nettel_erase);
+		if (ret) {
+			set_current_state(TASK_RUNNING);
+			remove_wait_queue(&wait_q, &wait);
+			put_mtd_device(mtd);
+			return(ret);
+		}
+
+		schedule();  /* Wait for erase to finish. */
+		remove_wait_queue(&wait_q, &wait);
+		
+		put_mtd_device(mtd);
+	}
+
+	return(0);
+}
+
+#else
+
+int nettel_eraseconfig(void)
+{
+	return(0);
+}
+
+#endif
+
+/****************************************************************************/
+
+int __init nettel_init(void)
+{
+	volatile unsigned long *amdpar;
+	unsigned long amdaddr, maxsize;
+	int num_amd_partitions=0;
+#ifdef CONFIG_MTD_CFI_INTELEXT
+	volatile unsigned long *intel0par, *intel1par;
+	unsigned long orig_bootcspar, orig_romcs1par;
+	unsigned long intel0addr, intel0size;
+	unsigned long intel1addr, intel1size;
+	int intelboot, intel0cs, intel1cs;
+	int num_intel_partitions;
+#endif
+	int rc = 0;
+
+	nettel_mmcrp = (void *) ioremap_nocache(0xfffef000, 4096);
+	if (nettel_mmcrp == NULL) {
+		printk("SNAPGEAR: failed to disable MMCR cache??\n");
+		return(-EIO);
+	}
+
+	/* Set CPU clock to be 33.000MHz */
+	*((unsigned char *) (nettel_mmcrp + 0xc64)) = 0x01;
+
+	amdpar = (volatile unsigned long *) (nettel_mmcrp + 0xc4);
+
+#ifdef CONFIG_MTD_CFI_INTELEXT
+	intelboot = 0;
+	intel0cs = SC520_PAR_ROMCS1;
+	intel0par = (volatile unsigned long *) (nettel_mmcrp + 0xc0);
+	intel1cs = SC520_PAR_ROMCS2;
+	intel1par = (volatile unsigned long *) (nettel_mmcrp + 0xbc);
+
+	/*
+	 *	Save the CS settings then ensure ROMCS1 and ROMCS2 are off,
+	 *	otherwise they might clash with where we try to map BOOTCS.
+	 */
+	orig_bootcspar = *amdpar;
+	orig_romcs1par = *intel0par;
+	*intel0par = 0;
+	*intel1par = 0;
+#endif
+
+	/*
+	 *	The first thing to do is determine if we have a separate
+	 *	boot FLASH device. Typically this is a small (1 to 2MB)
+	 *	AMD FLASH part. It seems that device size is about the
+	 *	only way to tell if this is the case...
+	 */
+	amdaddr = 0x20000000;
+	maxsize = AMD_WINDOW_MAXSIZE;
+
+	*amdpar = SC520_PAR(SC520_PAR_BOOTCS, amdaddr, maxsize);
+	__asm__ ("wbinvd");
+
+	nettel_amd_map.map_priv_1 = (unsigned long)
+		ioremap_nocache(amdaddr, maxsize);
+	if (!nettel_amd_map.map_priv_1) {
+		printk("SNAPGEAR: failed to ioremap() BOOTCS\n");
+		return(-EIO);
+	}
+
+	if ((amd_mtd = do_map_probe("jedec_probe", &nettel_amd_map))) {
+		printk(KERN_NOTICE "SNAPGEAR: AMD flash device size = %dK\n",
+			amd_mtd->size>>10);
+
+		amd_mtd->module = THIS_MODULE;
+
+		/* The high BIOS partition is only present for 2MB units */
+		num_amd_partitions = NUM_AMD_PARTITIONS;
+		if (amd_mtd->size < AMD_WINDOW_MAXSIZE)
+			num_amd_partitions--;
+		/* Don't add the partition until after the primary INTEL's */
+
+#ifdef CONFIG_MTD_CFI_INTELEXT
+		/*
+		 *	Map the Intel flash into memory after the AMD
+		 *	It has to start on a multiple of maxsize.
+		 */
+		maxsize = SC520_PAR_TO_SIZE(orig_romcs1par);
+		if (maxsize < (32 * 1024 * 1024))
+			maxsize = (32 * 1024 * 1024);
+		intel0addr = amdaddr + maxsize;
+#endif
+	} else {
+#ifdef CONFIG_MTD_CFI_INTELEXT
+		/* INTEL boot FLASH */
+		intelboot++;
+
+		if (!orig_romcs1par) {
+			intel0cs = SC520_PAR_BOOTCS;
+			intel0par = (volatile unsigned long *)
+				(nettel_mmcrp + 0xc4);
+			intel1cs = SC520_PAR_ROMCS1;
+			intel1par = (volatile unsigned long *)
+				(nettel_mmcrp + 0xc0);
+
+			intel0addr = SC520_PAR_TO_ADDR(orig_bootcspar);
+			maxsize = SC520_PAR_TO_SIZE(orig_bootcspar);
+		} else {
+			/* Kernel base is on ROMCS1, not BOOTCS */
+			intel0cs = SC520_PAR_ROMCS1;
+			intel0par = (volatile unsigned long *)
+				(nettel_mmcrp + 0xc0);
+			intel1cs = SC520_PAR_BOOTCS;
+			intel1par = (volatile unsigned long *)
+				(nettel_mmcrp + 0xc4);
+
+			intel0addr = SC520_PAR_TO_ADDR(orig_romcs1par);
+			maxsize = SC520_PAR_TO_SIZE(orig_romcs1par);
+		}
+
+		/* Destroy useless AMD MTD mapping */
+		amd_mtd = NULL;
+		iounmap((void *) nettel_amd_map.map_priv_1);
+		nettel_amd_map.map_priv_1 = (unsigned long) NULL;
+#else
+		/* Only AMD flash supported */
+		return(-ENXIO);
+#endif
+	}
+
+#ifdef CONFIG_MTD_CFI_INTELEXT
+	/*
+	 *	We have determined the INTEL FLASH configuration, so lets
+	 *	go ahead and probe for them now.
+	 */
+
+	/* Set PAR to the maximum size */
+	if (maxsize < (32 * 1024 * 1024))
+		maxsize = (32 * 1024 * 1024);
+	*intel0par = SC520_PAR(intel0cs, intel0addr, maxsize);
+
+	/* Turn other PAR off so the first probe doesn't find it */
+	*intel1par = 0;
+
+	/* Probe for the the size of the first Intel flash */
+	nettel_intel_map.size = maxsize;
+	nettel_intel_map.map_priv_1 = (unsigned long)
+		ioremap_nocache(intel0addr, maxsize);
+	if (!nettel_intel_map.map_priv_1) {
+		printk("SNAPGEAR: failed to ioremap() ROMCS1\n");
+		return(-EIO);
+	}
+
+	intel_mtd = do_map_probe("cfi_probe", &nettel_intel_map);
+	if (! intel_mtd) {
+		iounmap((void *) nettel_intel_map.map_priv_1);
+		return(-ENXIO);
+	}
+
+	/* Set PAR to the detected size */
+	intel0size = intel_mtd->size;
+	*intel0par = SC520_PAR(intel0cs, intel0addr, intel0size);
+
+	/*
+	 *	Map second Intel FLASH right after first. Set its size to the
+	 *	same maxsize used for the first Intel FLASH.
+	 */
+	intel1addr = intel0addr + intel0size;
+	*intel1par = SC520_PAR(intel1cs, intel1addr, maxsize);
+	__asm__ ("wbinvd");
+
+	maxsize += intel0size;
+
+	/* Delete the old map and probe again to do both chips */
+	map_destroy(intel_mtd);
+	intel_mtd = NULL;
+	iounmap((void *) nettel_intel_map.map_priv_1);
+
+	nettel_intel_map.size = maxsize;
+	nettel_intel_map.map_priv_1 = (unsigned long)
+		ioremap_nocache(intel0addr, maxsize);
+	if (!nettel_intel_map.map_priv_1) {
+		printk("SNAPGEAR: failed to ioremap() ROMCS1/2\n");
+		return(-EIO);
+	}
+
+	intel_mtd = do_map_probe("cfi_probe", &nettel_intel_map);
+	if (! intel_mtd) {
+		iounmap((void *) nettel_intel_map.map_priv_1);
+		return(-ENXIO);
+	}
+
+	intel1size = intel_mtd->size - intel0size;
+	if (intel1size > 0) {
+		*intel1par = SC520_PAR(intel1cs, intel1addr, intel1size);
+		__asm__ ("wbinvd");
+	} else {
+		*intel1par = 0;
+	}
+
+	printk(KERN_NOTICE "SNAPGEAR: Intel flash device size = %dK\n",
+		(intel_mtd->size >> 10));
+
+	intel_mtd->module = THIS_MODULE;
+
+#ifndef CONFIG_BLK_DEV_INITRD
+	ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, 1);
+#endif
+
+	num_intel_partitions = sizeof(nettel_intel_partitions) /
+		sizeof(nettel_intel_partitions[0]);
+
+	if (intelboot) {
+		/*
+		 *	Adjust offset and size of last boot partition.
+		 *	Must allow for BIOS region at end of FLASH.
+		 */
+		nettel_intel_partitions[1].size = (intel0size + intel1size) -
+			(1024*1024 + intel_mtd->erasesize);
+		nettel_intel_partitions[3].size = intel0size + intel1size;
+		nettel_intel_partitions[4].offset = 
+			(intel0size + intel1size) - intel_mtd->erasesize;
+		nettel_intel_partitions[4].size = intel_mtd->erasesize;
+		nettel_intel_partitions[5].offset =
+			nettel_intel_partitions[4].offset;
+		nettel_intel_partitions[5].size =
+			nettel_intel_partitions[4].size;
+	} else {
+		/* No BIOS regions when AMD boot */
+		num_intel_partitions -= 2;
+	}
+	rc = add_mtd_partitions(intel_mtd, nettel_intel_partitions,
+		num_intel_partitions);
+#endif
+
+	if (amd_mtd) {
+		rc = add_mtd_partitions(amd_mtd, nettel_amd_partitions,
+			num_amd_partitions);
+	}
+
+#ifdef CONFIG_MTD_CFI_INTELEXT
+	register_reboot_notifier(&nettel_notifier_block);
+#endif
+
+	return(rc);
+}
+
+/****************************************************************************/
+
+void __exit nettel_cleanup(void)
+{
+#ifdef CONFIG_MTD_CFI_INTELEXT
+	unregister_reboot_notifier(&nettel_notifier_block);
+#endif
+	if (amd_mtd) {
+		del_mtd_partitions(amd_mtd);
+		map_destroy(amd_mtd);
+	}
+	if (nettel_amd_map.map_priv_1) {
+		iounmap((void *)nettel_amd_map.map_priv_1);
+		nettel_amd_map.map_priv_1 = 0;
+	}
+#ifdef CONFIG_MTD_CFI_INTELEXT
+	if (intel_mtd) {
+		del_mtd_partitions(intel_mtd);
+		map_destroy(intel_mtd);
+	}
+	if (nettel_intel_map.map_priv_1) {
+		iounmap((void *)nettel_intel_map.map_priv_1);
+		nettel_intel_map.map_priv_1 = 0;
+	}
+#endif
+}
+
+/****************************************************************************/
+
+module_init(nettel_init);
+module_exit(nettel_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com>");
+MODULE_DESCRIPTION("SnapGear/SecureEdge FLASH support");
+
+/****************************************************************************/