diff options
Diffstat (limited to 'kernel/drivers/mtd/maps/nettel.c')
| -rw-r--r-- | kernel/drivers/mtd/maps/nettel.c | 454 |
1 files changed, 454 insertions, 0 deletions
diff --git a/kernel/drivers/mtd/maps/nettel.c b/kernel/drivers/mtd/maps/nettel.c new file mode 100644 index 000000000..eadcfffc4 --- /dev/null +++ b/kernel/drivers/mtd/maps/nettel.c @@ -0,0 +1,454 @@ +/****************************************************************************/ + +/* + * 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) + */ + +/****************************************************************************/ + +#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 <linux/err.h> +#include <linux/kdev_t.h> +#include <linux/root_dev.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; + +/****************************************************************************/ + +/****************************************************************************/ + +#ifdef CONFIG_MTD_CFI_INTELEXT +static struct map_info nettel_intel_map = { + .name = "SnapGear Intel", + .size = 0, + .bankwidth = INTEL_BUSWIDTH, +}; + +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, + .bankwidth = AMD_BUSWIDTH, +}; + +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 ARRAY_SIZE(nettel_amd_partitions) + +/****************************************************************************/ + +#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 +}; + +#endif + +/****************************************************************************/ + +static 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.phys = amdaddr; + nettel_amd_map.virt = ioremap_nocache(amdaddr, maxsize); + if (!nettel_amd_map.virt) { + printk("SNAPGEAR: failed to ioremap() BOOTCS\n"); + iounmap(nettel_mmcrp); + return(-EIO); + } + simple_map_init(&nettel_amd_map); + + if ((amd_mtd = do_map_probe("jedec_probe", &nettel_amd_map))) { + printk(KERN_NOTICE "SNAPGEAR: AMD flash device size = %dK\n", + (int)(amd_mtd->size>>10)); + + amd_mtd->owner = 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(nettel_amd_map.virt); + nettel_amd_map.virt = NULL; +#else + /* Only AMD flash supported */ + rc = -ENXIO; + goto out_unmap2; +#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 size of the first Intel flash */ + nettel_intel_map.size = maxsize; + nettel_intel_map.phys = intel0addr; + nettel_intel_map.virt = ioremap_nocache(intel0addr, maxsize); + if (!nettel_intel_map.virt) { + printk("SNAPGEAR: failed to ioremap() ROMCS1\n"); + rc = -EIO; + goto out_unmap2; + } + simple_map_init(&nettel_intel_map); + + intel_mtd = do_map_probe("cfi_probe", &nettel_intel_map); + if (!intel_mtd) { + rc = -ENXIO; + goto out_unmap1; + } + + /* 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(nettel_intel_map.virt); + + nettel_intel_map.size = maxsize; + nettel_intel_map.virt = ioremap_nocache(intel0addr, maxsize); + if (!nettel_intel_map.virt) { + printk("SNAPGEAR: failed to ioremap() ROMCS1/2\n"); + rc = -EIO; + goto out_unmap2; + } + + intel_mtd = do_map_probe("cfi_probe", &nettel_intel_map); + if (! intel_mtd) { + rc = -ENXIO; + goto out_unmap1; + } + + 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 = %lldKiB\n", + (unsigned long long)(intel_mtd->size >> 10)); + + intel_mtd->owner = THIS_MODULE; + + num_intel_partitions = ARRAY_SIZE(nettel_intel_partitions); + + 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 = mtd_device_register(intel_mtd, nettel_intel_partitions, + num_intel_partitions); +#endif + + if (amd_mtd) { + rc = mtd_device_register(amd_mtd, nettel_amd_partitions, + num_amd_partitions); + } + +#ifdef CONFIG_MTD_CFI_INTELEXT + register_reboot_notifier(&nettel_notifier_block); +#endif + + return(rc); + +#ifdef CONFIG_MTD_CFI_INTELEXT +out_unmap1: + iounmap(nettel_intel_map.virt); +#endif + +out_unmap2: + iounmap(nettel_mmcrp); + iounmap(nettel_amd_map.virt); + + return(rc); + +} + +/****************************************************************************/ + +static void __exit nettel_cleanup(void) +{ +#ifdef CONFIG_MTD_CFI_INTELEXT + unregister_reboot_notifier(&nettel_notifier_block); +#endif + if (amd_mtd) { + mtd_device_unregister(amd_mtd); + map_destroy(amd_mtd); + } + if (nettel_mmcrp) { + iounmap(nettel_mmcrp); + nettel_mmcrp = NULL; + } + if (nettel_amd_map.virt) { + iounmap(nettel_amd_map.virt); + nettel_amd_map.virt = NULL; + } +#ifdef CONFIG_MTD_CFI_INTELEXT + if (intel_mtd) { + mtd_device_unregister(intel_mtd); + map_destroy(intel_mtd); + } + if (nettel_intel_map.virt) { + iounmap(nettel_intel_map.virt); + nettel_intel_map.virt = NULL; + } +#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"); + +/****************************************************************************/ |