X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fmtd%2Fmaps%2Famd76xrom.c;h=51e97b05304e4ee37f5bf8a6e3d0b3e0269cde8b;hb=6a77f38946aaee1cd85eeec6cf4229b204c15071;hp=b4331273127098a17923ba6025d939c770e14066;hpb=87fc8d1bb10cd459024a742c6a10961fefcef18f;p=linux-2.6.git diff --git a/drivers/mtd/maps/amd76xrom.c b/drivers/mtd/maps/amd76xrom.c index b43312731..51e97b053 100644 --- a/drivers/mtd/maps/amd76xrom.c +++ b/drivers/mtd/maps/amd76xrom.c @@ -2,7 +2,7 @@ * amd76xrom.c * * Normal mappings of chips in physical memory - * $Id: amd76xrom.c,v 1.12 2004/07/14 14:44:31 thayne Exp $ + * $Id: amd76xrom.c,v 1.19 2004/11/28 09:40:39 dwmw2 Exp $ */ #include @@ -12,61 +12,73 @@ #include #include #include +#include +#include #include #include #include +#include #define xstr(s) str(s) #define str(s) #s #define MOD_NAME xstr(KBUILD_BASENAME) -#define MTD_DEV_NAME_LENGTH 16 +#define ADDRESS_NAME_LEN 18 + +#define ROM_PROBE_STEP_SIZE (64*1024) /* 64KiB */ + +struct amd76xrom_window { + void __iomem *virt; + unsigned long phys; + unsigned long size; + struct list_head maps; + struct resource rsrc; + struct pci_dev *pdev; +}; struct amd76xrom_map_info { + struct list_head list; struct map_info map; struct mtd_info *mtd; - void __iomem * window_addr; - u32 window_start, window_size; - struct pci_dev *pdev; - struct resource window_rsrc; - struct resource rom_rsrc; - char mtd_name[MTD_DEV_NAME_LENGTH]; + struct resource rsrc; + char map_name[sizeof(MOD_NAME) + 2 + ADDRESS_NAME_LEN]; }; - -static struct amd76xrom_map_info amd76xrom_map = { - .map = { - .name = MOD_NAME, - .size = 0, - .bankwidth = 1, - } - /* remaining fields of structure are initialized to 0 */ +static struct amd76xrom_window amd76xrom_window = { + .maps = LIST_HEAD_INIT(amd76xrom_window.maps), }; - -static void amd76xrom_cleanup(struct amd76xrom_map_info *info) +static void amd76xrom_cleanup(struct amd76xrom_window *window) { + struct amd76xrom_map_info *map, *scratch; u8 byte; - /* Disable writes through the rom window */ - pci_read_config_byte(info->pdev, 0x40, &byte); - pci_write_config_byte(info->pdev, 0x40, byte & ~1); + if (window->pdev) { + /* Disable writes through the rom window */ + pci_read_config_byte(window->pdev, 0x40, &byte); + pci_write_config_byte(window->pdev, 0x40, byte & ~1); + } - if (info->mtd) { - del_mtd_device(info->mtd); - map_destroy(info->mtd); - info->mtd = NULL; - info->map.virt = NULL; + /* Free all of the mtd devices */ + list_for_each_entry_safe(map, scratch, &window->maps, list) { + if (map->rsrc.parent) { + release_resource(&map->rsrc); + } + del_mtd_device(map->mtd); + map_destroy(map->mtd); + list_del(&map->list); + kfree(map); } - if (info->rom_rsrc.parent) - release_resource(&info->rom_rsrc); - if (info->window_rsrc.parent) - release_resource(&info->window_rsrc); - - if (info->window_addr) { - iounmap(info->window_addr); - info->window_addr = NULL; + if (window->rsrc.parent) + release_resource(&window->rsrc); + + if (window->virt) { + iounmap(window->virt); + window->virt = NULL; + window->phys = 0; + window->size = 0; + window->pdev = NULL; } } @@ -74,167 +86,196 @@ static void amd76xrom_cleanup(struct amd76xrom_map_info *info) static int __devinit amd76xrom_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) { - struct rom_window { - u32 start; - u32 size; - u8 segen_bits; - }; - static struct rom_window rom_window[] = { - /* - * Need the 5MiB window for chips that have block lock/unlock - * registers located below 4MiB window. - */ - { 0xffb00000, 5*1024*1024, (1<<7) | (1<<6), }, - { 0xffc00000, 4*1024*1024, (1<<7), }, - { 0xffff0000, 64*1024, 0 }, - { 0 , 0, 0 }, - }; - static const u32 rom_probe_sizes[] = { - 5*1024*1024, 4*1024*1024, 2*1024*1024, 1024*1024, 512*1024, - 256*1024, 128*1024, 64*1024, 0}; static char *rom_probe_types[] = { "cfi_probe", "jedec_probe", NULL }; u8 byte; - struct amd76xrom_map_info *info = &amd76xrom_map; - struct rom_window *window; - int i; - u32 rom_size; - - info->pdev = pdev; - window = &rom_window[0]; - - while (window->size) { - /* - * Try to reserve the window mem region. If this fails then - * it is likely due to a fragment of the window being - * "reseved" by the BIOS. In the case that the - * request_mem_region() fails then once the rom size is - * discovered we will try to reserve the unreserved fragment. - */ - info->window_rsrc.name = MOD_NAME; - info->window_rsrc.start = window->start; - info->window_rsrc.end = window->start + window->size - 1; - info->window_rsrc.flags = IORESOURCE_MEM | IORESOURCE_BUSY; - if (request_resource(&iomem_resource, &info->window_rsrc)) { - info->window_rsrc.parent = NULL; - printk(KERN_ERR MOD_NAME - " %s(): Unable to register resource" - " 0x%.08lx-0x%.08lx - kernel bug?\n", - __func__, - info->window_rsrc.start, info->window_rsrc.end); - } + struct amd76xrom_window *window = &amd76xrom_window; + struct amd76xrom_map_info *map = NULL; + unsigned long map_top; + + /* Remember the pci dev I find the window in */ + window->pdev = pdev; - /* Enable the selected rom window */ - pci_read_config_byte(pdev, 0x43, &byte); - pci_write_config_byte(pdev, 0x43, byte | window->segen_bits); + /* Assume the rom window is properly setup, and find it's size */ + pci_read_config_byte(pdev, 0x43, &byte); + if ((byte & ((1<<7)|(1<<6))) == ((1<<7)|(1<<6))) { + window->phys = 0xffb00000; /* 5MiB */ + } + else if ((byte & (1<<7)) == (1<<7)) { + window->phys = 0xffc00000; /* 4MiB */ + } + else { + window->phys = 0xffff0000; /* 64KiB */ + } + window->size = 0xffffffffUL - window->phys + 1UL; + + /* + * Try to reserve the window mem region. If this fails then + * it is likely due to a fragment of the window being + * "reseved" by the BIOS. In the case that the + * request_mem_region() fails then once the rom size is + * discovered we will try to reserve the unreserved fragment. + */ + window->rsrc.name = MOD_NAME; + window->rsrc.start = window->phys; + window->rsrc.end = window->phys + window->size - 1; + window->rsrc.flags = IORESOURCE_MEM | IORESOURCE_BUSY; + if (request_resource(&iomem_resource, &window->rsrc)) { + window->rsrc.parent = NULL; + printk(KERN_ERR MOD_NAME + " %s(): Unable to register resource" + " 0x%.08lx-0x%.08lx - kernel bug?\n", + __func__, + window->rsrc.start, window->rsrc.end); + } - /* Enable writes through the rom window */ - pci_read_config_byte(pdev, 0x40, &byte); - pci_write_config_byte(pdev, 0x40, byte | 1); +#if 0 - /* FIXME handle registers 0x80 - 0x8C the bios region locks */ + /* Enable the selected rom window */ + pci_read_config_byte(pdev, 0x43, &byte); + pci_write_config_byte(pdev, 0x43, byte | rwindow->segen_bits); +#endif - printk(KERN_NOTICE MOD_NAME " window : %x at %x\n", - window->size, window->start); - /* For write accesses caches are useless */ - info->window_addr = ioremap_nocache(window->start, - window->size); + /* Enable writes through the rom window */ + pci_read_config_byte(pdev, 0x40, &byte); + pci_write_config_byte(pdev, 0x40, byte | 1); + + /* FIXME handle registers 0x80 - 0x8C the bios region locks */ + + /* For write accesses caches are useless */ + window->virt = ioremap_nocache(window->phys, window->size); + if (!window->virt) { + printk(KERN_ERR MOD_NAME ": ioremap(%08lx, %08lx) failed\n", + window->phys, window->size); + goto out; + } - if (!info->window_addr) { - printk(KERN_ERR "Failed to ioremap\n"); - continue; + /* Get the first address to look for an rom chip at */ + map_top = window->phys; +#if 1 + /* The probe sequence run over the firmware hub lock + * registers sets them to 0x7 (no access). + * Probe at most the last 4M of the address space. + */ + if (map_top < 0xffc00000) { + map_top = 0xffc00000; + } +#endif + /* Loop through and look for rom chips */ + while((map_top - 1) < 0xffffffffUL) { + struct cfi_private *cfi; + unsigned long offset; + int i; + + if (!map) { + map = kmalloc(sizeof(*map), GFP_KERNEL); + } + if (!map) { + printk(KERN_ERR MOD_NAME ": kmalloc failed"); + goto out; } + memset(map, 0, sizeof(*map)); + INIT_LIST_HEAD(&map->list); + map->map.name = map->map_name; + map->map.phys = map_top; + offset = map_top - window->phys; + map->map.virt = (void __iomem *) + (((unsigned long)(window->virt)) + offset); + map->map.size = 0xffffffffUL - map_top + 1UL; + /* Set the name of the map to the address I am trying */ + sprintf(map->map_name, "%s @%08lx", + MOD_NAME, map->map.phys); + + /* There is no generic VPP support */ + for(map->map.bankwidth = 32; map->map.bankwidth; + map->map.bankwidth >>= 1) + { + char **probe_type; + /* Skip bankwidths that are not supported */ + if (!map_bankwidth_supported(map->map.bankwidth)) + continue; - info->mtd = NULL; + /* Setup the map methods */ + simple_map_init(&map->map); - for(i = 0; (rom_size = rom_probe_sizes[i]); i++) { - char **chip_type; - if (rom_size > window->size) { - continue; - } - info->map.phys = window->start + window->size - rom_size; - info->map.virt = - info->window_addr + window->size - rom_size; - info->map.size = rom_size; - simple_map_init(&info->map); - chip_type = rom_probe_types; - for(; !info->mtd && *chip_type; chip_type++) { - info->mtd = do_map_probe(*chip_type, &amd76xrom_map.map); + /* Try all of the probe methods */ + probe_type = rom_probe_types; + for(; *probe_type; probe_type++) { + map->mtd = do_map_probe(*probe_type, &map->map); + if (map->mtd) + goto found; } - if (info->mtd) goto found_mtd; } - iounmap(info->window_addr); - info->window_addr = NULL; - - /* Disable writes through the rom window */ - pci_read_config_byte(pdev, 0x40, &byte); - pci_write_config_byte(pdev, 0x40, byte & ~1); - - window++; - } - goto failed; - - found_mtd: - printk(KERN_NOTICE MOD_NAME " chip at offset: 0x%x\n", - window->size - rom_size); - - info->mtd->owner = THIS_MODULE; - - if (!info->window_rsrc.parent) { - /* failed to reserve entire window - try fragments */ - info->window_rsrc.name = MOD_NAME; - info->window_rsrc.start = window->start; - info->window_rsrc.end = window->start + window->size - rom_size - 1; - info->window_rsrc.flags = IORESOURCE_MEM | IORESOURCE_BUSY; - if (request_resource(&iomem_resource, &info->window_rsrc)) { - printk(KERN_ERR MOD_NAME - ": cannot reserve window resource fragment\n"); -#if 0 + map_top += ROM_PROBE_STEP_SIZE; + continue; + found: + /* Trim the size if we are larger than the map */ + if (map->mtd->size > map->map.size) { + printk(KERN_WARNING MOD_NAME + " rom(%u) larger than window(%lu). fixing...\n", + map->mtd->size, map->map.size); + map->mtd->size = map->map.size; + } + if (window->rsrc.parent) { /* - * The BIOS e820 usually reserves this so it isn't - * usually an error. + * Registering the MTD device in iomem may not be possible + * if there is a BIOS "reserved" and BUSY range. If this + * fails then continue anyway. */ - goto failed; -#endif + map->rsrc.name = map->map_name; + map->rsrc.start = map->map.phys; + map->rsrc.end = map->map.phys + map->mtd->size - 1; + map->rsrc.flags = IORESOURCE_MEM | IORESOURCE_BUSY; + if (request_resource(&window->rsrc, &map->rsrc)) { + printk(KERN_ERR MOD_NAME + ": cannot reserve MTD resource\n"); + map->rsrc.parent = NULL; + } } - } - add_mtd_device(info->mtd); - info->window_start = window->start; - info->window_size = window->size; - - if (info->window_rsrc.parent) { - /* - * Registering the MTD device in iomem may not be possible - * if there is a BIOS "reserved" and BUSY range. If this - * fails then continue anyway. - */ - snprintf(info->mtd_name, MTD_DEV_NAME_LENGTH, - "mtd%d", info->mtd->index); - - info->rom_rsrc.name = info->mtd_name; - info->rom_rsrc.start = window->start + window->size - rom_size; - info->rom_rsrc.end = window->start + window->size - 1; - info->rom_rsrc.flags = IORESOURCE_MEM | IORESOURCE_BUSY; - if (request_resource(&info->window_rsrc, &info->rom_rsrc)) { - printk(KERN_ERR MOD_NAME - ": cannot reserve MTD resource\n"); - info->rom_rsrc.parent = NULL; + /* Make the whole region visible in the map */ + map->map.virt = window->virt; + map->map.phys = window->phys; + cfi = map->map.fldrv_priv; + for(i = 0; i < cfi->numchips; i++) { + cfi->chips[i].start += offset; } + + /* Now that the mtd devices is complete claim and export it */ + map->mtd->owner = THIS_MODULE; + if (add_mtd_device(map->mtd)) { + map_destroy(map->mtd); + map->mtd = NULL; + goto out; + } + + + /* Calculate the new value of map_top */ + map_top += map->mtd->size; + + /* File away the map structure */ + list_add(&map->list, &window->maps); + map = NULL; } + out: + /* Free any left over map structures */ + if (map) { + kfree(map); + } + /* See if I have any map structures */ + if (list_empty(&window->maps)) { + amd76xrom_cleanup(window); + return -ENODEV; + } return 0; - - failed: - amd76xrom_cleanup(info); - return -ENODEV; } static void __devexit amd76xrom_remove_one (struct pci_dev *pdev) { - struct amd76xrom_map_info *info = &amd76xrom_map; + struct amd76xrom_window *window = &amd76xrom_window; - amd76xrom_cleanup(info); + amd76xrom_cleanup(window); } static struct pci_device_id amd76xrom_pci_tbl[] = { @@ -257,7 +298,7 @@ static struct pci_driver amd76xrom_driver = { }; #endif -int __init init_amd76xrom(void) +static int __init init_amd76xrom(void) { struct pci_dev *pdev; struct pci_device_id *id; @@ -269,7 +310,6 @@ int __init init_amd76xrom(void) } } if (pdev) { - amd76xrom_map.pdev = pdev; return amd76xrom_init_one(pdev, &amd76xrom_pci_tbl[0]); } return -ENXIO; @@ -280,7 +320,7 @@ int __init init_amd76xrom(void) static void __exit cleanup_amd76xrom(void) { - amd76xrom_remove_one(amd76xrom_map.pdev); + amd76xrom_remove_one(amd76xrom_window.pdev); } module_init(init_amd76xrom);