X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fmtd%2Fmaps%2Famd76xrom.c;h=78b671172bb225d6978cacd5f164c13628a39066;hb=refs%2Fheads%2Fvserver;hp=51e97b05304e4ee37f5bf8a6e3d0b3e0269cde8b;hpb=6a77f38946aaee1cd85eeec6cf4229b204c15071;p=linux-2.6.git diff --git a/drivers/mtd/maps/amd76xrom.c b/drivers/mtd/maps/amd76xrom.c index 51e97b053..78b671172 100644 --- a/drivers/mtd/maps/amd76xrom.c +++ b/drivers/mtd/maps/amd76xrom.c @@ -2,11 +2,12 @@ * amd76xrom.c * * Normal mappings of chips in physical memory - * $Id: amd76xrom.c,v 1.19 2004/11/28 09:40:39 dwmw2 Exp $ + * $Id: amd76xrom.c,v 1.21 2005/11/07 11:14:26 gleixner Exp $ */ #include #include +#include #include #include #include @@ -14,7 +15,6 @@ #include #include #include -#include #include #include #include @@ -45,6 +45,23 @@ struct amd76xrom_map_info { char map_name[sizeof(MOD_NAME) + 2 + ADDRESS_NAME_LEN]; }; +/* The 2 bits controlling the window size are often set to allow reading + * the BIOS, but too small to allow writing, since the lock registers are + * 4MiB lower in the address space than the data. + * + * This is intended to prevent flashing the bios, perhaps accidentally. + * + * This parameter allows the normal driver to over-ride the BIOS settings. + * + * The bits are 6 and 7. If both bits are set, it is a 5MiB window. + * If only the 7 Bit is set, it is a 4MiB window. Otherwise, a + * 64KiB window. + * + */ +static uint win_size_bits; +module_param(win_size_bits, uint, 0); +MODULE_PARM_DESC(win_size_bits, "ROM window size bits override for 0x43 byte, normally set by BIOS."); + static struct amd76xrom_window amd76xrom_window = { .maps = LIST_HEAD_INIT(amd76xrom_window.maps), }; @@ -58,6 +75,7 @@ static void amd76xrom_cleanup(struct amd76xrom_window *window) /* Disable writes through the rom window */ pci_read_config_byte(window->pdev, 0x40, &byte); pci_write_config_byte(window->pdev, 0x40, byte & ~1); + pci_dev_put(window->pdev); } /* Free all of the mtd devices */ @@ -70,7 +88,7 @@ static void amd76xrom_cleanup(struct amd76xrom_window *window) list_del(&map->list); kfree(map); } - if (window->rsrc.parent) + if (window->rsrc.parent) release_resource(&window->rsrc); if (window->virt) { @@ -92,9 +110,19 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev, struct amd76xrom_map_info *map = NULL; unsigned long map_top; - /* Remember the pci dev I find the window in */ + /* Remember the pci dev I find the window in - already have a ref */ window->pdev = pdev; + /* Enable the selected rom window. This is often incorrectly + * set up by the BIOS, and the 4MiB offset for the lock registers + * requires the full 5MiB of window space. + * + * This 'write, then read' approach leaves the bits for + * other uses of the hardware info. + */ + pci_read_config_byte(pdev, 0x43, &byte); + pci_write_config_byte(pdev, 0x43, byte | win_size_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))) { @@ -107,7 +135,7 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev, 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 @@ -123,22 +151,17 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev, window->rsrc.parent = NULL; printk(KERN_ERR MOD_NAME " %s(): Unable to register resource" - " 0x%.08lx-0x%.08lx - kernel bug?\n", + " 0x%.16llx-0x%.16llx - kernel bug?\n", __func__, - window->rsrc.start, window->rsrc.end); + (unsigned long long)window->rsrc.start, + (unsigned long long)window->rsrc.end); } -#if 0 - - /* Enable the selected rom window */ - pci_read_config_byte(pdev, 0x43, &byte); - pci_write_config_byte(pdev, 0x43, byte | rwindow->segen_bits); -#endif /* 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 */ @@ -186,7 +209,7 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev, MOD_NAME, map->map.phys); /* There is no generic VPP support */ - for(map->map.bankwidth = 32; map->map.bankwidth; + for(map->map.bankwidth = 32; map->map.bankwidth; map->map.bankwidth >>= 1) { char **probe_type; @@ -239,7 +262,7 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev, 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)) { @@ -259,9 +282,7 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev, out: /* Free any left over map structures */ - if (map) { - kfree(map); - } + kfree(map); /* See if I have any map structures */ if (list_empty(&window->maps)) { amd76xrom_cleanup(window); @@ -279,9 +300,9 @@ static void __devexit amd76xrom_remove_one (struct pci_dev *pdev) } static struct pci_device_id amd76xrom_pci_tbl[] = { - { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7410, + { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7410, PCI_ANY_ID, PCI_ANY_ID, }, - { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7440, + { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7440, PCI_ANY_ID, PCI_ANY_ID, }, { PCI_VENDOR_ID_AMD, 0x7468 }, /* amd8111 support */ { 0, } @@ -304,7 +325,7 @@ static int __init init_amd76xrom(void) struct pci_device_id *id; pdev = NULL; for(id = amd76xrom_pci_tbl; id->vendor; id++) { - pdev = pci_find_device(id->vendor, id->device, NULL); + pdev = pci_get_device(id->vendor, id->device, NULL); if (pdev) { break; } @@ -314,7 +335,7 @@ static int __init init_amd76xrom(void) } return -ENXIO; #if 0 - return pci_module_init(&amd76xrom_driver); + return pci_register_driver(&amd76xrom_driver); #endif }