/* * linux/drivers/mtd/maps/pci.c * * Copyright (C) 2001 Russell King, All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * $Id: pci.c,v 1.14 2005/11/17 08:20:27 dwmw2 Exp $ * * Generic PCI memory map driver. We support the following boards: * - Intel IQ80310 ATU. * - Intel EBSA285 (blank rom programming mode). Tested working 27/09/2001 */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/mtd/mtd.h> #include <linux/mtd/map.h> #include <linux/mtd/partitions.h> struct map_pci_info; struct mtd_pci_info { int (*init)(struct pci_dev *dev, struct map_pci_info *map); void (*exit)(struct pci_dev *dev, struct map_pci_info *map); unsigned long (*translate)(struct map_pci_info *map, unsigned long ofs); const char *map_name; }; struct map_pci_info { struct map_info map; void __iomem *base; void (*exit)(struct pci_dev *dev, struct map_pci_info *map); unsigned long (*translate)(struct map_pci_info *map, unsigned long ofs); struct pci_dev *dev; }; static map_word mtd_pci_read8(struct map_info *_map, unsigned long ofs) { struct map_pci_info *map = (struct map_pci_info *)_map; map_word val; val.x[0]= readb(map->base + map->translate(map, ofs)); // printk("read8 : %08lx => %02x\n", ofs, val.x[0]); return val; } #if 0 static map_word mtd_pci_read16(struct map_info *_map, unsigned long ofs) { struct map_pci_info *map = (struct map_pci_info *)_map; map_word val; val.x[0] = readw(map->base + map->translate(map, ofs)); // printk("read16: %08lx => %04x\n", ofs, val.x[0]); return val; } #endif static map_word mtd_pci_read32(struct map_info *_map, unsigned long ofs) { struct map_pci_info *map = (struct map_pci_info *)_map; map_word val; val.x[0] = readl(map->base + map->translate(map, ofs)); // printk("read32: %08lx => %08x\n", ofs, val.x[0]); return val; } static void mtd_pci_copyfrom(struct map_info *_map, void *to, unsigned long from, ssize_t len) { struct map_pci_info *map = (struct map_pci_info *)_map; memcpy_fromio(to, map->base + map->translate(map, from), len); } static void mtd_pci_write8(struct map_info *_map, map_word val, unsigned long ofs) { struct map_pci_info *map = (struct map_pci_info *)_map; // printk("write8 : %08lx <= %02x\n", ofs, val.x[0]); writeb(val.x[0], map->base + map->translate(map, ofs)); } #if 0 static void mtd_pci_write16(struct map_info *_map, map_word val, unsigned long ofs) { struct map_pci_info *map = (struct map_pci_info *)_map; // printk("write16: %08lx <= %04x\n", ofs, val.x[0]); writew(val.x[0], map->base + map->translate(map, ofs)); } #endif static void mtd_pci_write32(struct map_info *_map, map_word val, unsigned long ofs) { struct map_pci_info *map = (struct map_pci_info *)_map; // printk("write32: %08lx <= %08x\n", ofs, val.x[0]); writel(val.x[0], map->base + map->translate(map, ofs)); } static void mtd_pci_copyto(struct map_info *_map, unsigned long to, const void *from, ssize_t len) { struct map_pci_info *map = (struct map_pci_info *)_map; memcpy_toio(map->base + map->translate(map, to), from, len); } static const struct map_info mtd_pci_map = { .phys = NO_XIP, .copy_from = mtd_pci_copyfrom, .copy_to = mtd_pci_copyto, }; /* * Intel IOP80310 Flash driver */ static int intel_iq80310_init(struct pci_dev *dev, struct map_pci_info *map) { u32 win_base; map->map.bankwidth = 1; map->map.read = mtd_pci_read8, map->map.write = mtd_pci_write8, map->map.size = 0x00800000; map->base = ioremap_nocache(pci_resource_start(dev, 0), pci_resource_len(dev, 0)); if (!map->base) return -ENOMEM; /* * We want to base the memory window at Xscale * bus address 0, not 0x1000. */ pci_read_config_dword(dev, 0x44, &win_base); pci_write_config_dword(dev, 0x44, 0); map->map.map_priv_2 = win_base; return 0; } static void intel_iq80310_exit(struct pci_dev *dev, struct map_pci_info *map) { if (map->base) iounmap(map->base); pci_write_config_dword(dev, 0x44, map->map.map_priv_2); } static unsigned long intel_iq80310_translate(struct map_pci_info *map, unsigned long ofs) { unsigned long page_addr = ofs & 0x00400000; /* * This mundges the flash location so we avoid * the first 80 bytes (they appear to read nonsense). */ if (page_addr) { writel(0x00000008, map->base + 0x1558); writel(0x00000000, map->base + 0x1550); } else { writel(0x00000007, map->base + 0x1558); writel(0x00800000, map->base + 0x1550); ofs += 0x00800000; } return ofs; } static struct mtd_pci_info intel_iq80310_info = { .init = intel_iq80310_init, .exit = intel_iq80310_exit, .translate = intel_iq80310_translate, .map_name = "cfi_probe", }; /* * Intel DC21285 driver */ static int intel_dc21285_init(struct pci_dev *dev, struct map_pci_info *map) { unsigned long base, len; base = pci_resource_start(dev, PCI_ROM_RESOURCE); len = pci_resource_len(dev, PCI_ROM_RESOURCE); if (!len || !base) { /* * No ROM resource */ base = pci_resource_start(dev, 2); len = pci_resource_len(dev, 2); /* * We need to re-allocate PCI BAR2 address range to the * PCI ROM BAR, and disable PCI BAR2. */ } else { /* * Hmm, if an address was allocated to the ROM resource, but * not enabled, should we be allocating a new resource for it * or simply enabling it? */ if (!(pci_resource_flags(dev, PCI_ROM_RESOURCE) & IORESOURCE_ROM_ENABLE)) { u32 val; pci_resource_flags(dev, PCI_ROM_RESOURCE) |= IORESOURCE_ROM_ENABLE; pci_read_config_dword(dev, PCI_ROM_ADDRESS, &val); val |= PCI_ROM_ADDRESS_ENABLE; pci_write_config_dword(dev, PCI_ROM_ADDRESS, val); printk("%s: enabling expansion ROM\n", pci_name(dev)); } } if (!len || !base) return -ENXIO; map->map.bankwidth = 4; map->map.read = mtd_pci_read32, map->map.write = mtd_pci_write32, map->map.size = len; map->base = ioremap_nocache(base, len); if (!map->base) return -ENOMEM; return 0; } static void intel_dc21285_exit(struct pci_dev *dev, struct map_pci_info *map) { u32 val; if (map->base) iounmap(map->base); /* * We need to undo the PCI BAR2/PCI ROM BAR address alteration. */ pci_resource_flags(dev, PCI_ROM_RESOURCE) &= ~IORESOURCE_ROM_ENABLE; pci_read_config_dword(dev, PCI_ROM_ADDRESS, &val); val &= ~PCI_ROM_ADDRESS_ENABLE; pci_write_config_dword(dev, PCI_ROM_ADDRESS, val); } static unsigned long intel_dc21285_translate(struct map_pci_info *map, unsigned long ofs) { return ofs & 0x00ffffc0 ? ofs : (ofs ^ (1 << 5)); } static struct mtd_pci_info intel_dc21285_info = { .init = intel_dc21285_init, .exit = intel_dc21285_exit, .translate = intel_dc21285_translate, .map_name = "jedec_probe", }; /* * PCI device ID table */ static struct pci_device_id mtd_pci_ids[] = { { .vendor = PCI_VENDOR_ID_INTEL, .device = 0x530d, .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, .class = PCI_CLASS_MEMORY_OTHER << 8, .class_mask = 0xffff00, .driver_data = (unsigned long)&intel_iq80310_info, }, { .vendor = PCI_VENDOR_ID_DEC, .device = PCI_DEVICE_ID_DEC_21285, .subvendor = 0, /* DC21285 defaults to 0 on reset */ .subdevice = 0, /* DC21285 defaults to 0 on reset */ .driver_data = (unsigned long)&intel_dc21285_info, }, { 0, } }; /* * Generic code follows. */ static int __devinit mtd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) { struct mtd_pci_info *info = (struct mtd_pci_info *)id->driver_data; struct map_pci_info *map = NULL; struct mtd_info *mtd = NULL; int err; err = pci_enable_device(dev); if (err) goto out; err = pci_request_regions(dev, "pci mtd"); if (err) goto out; map = kmalloc(sizeof(*map), GFP_KERNEL); err = -ENOMEM; if (!map) goto release; map->map = mtd_pci_map; map->map.name = pci_name(dev); map->dev = dev; map->exit = info->exit; map->translate = info->translate; err = info->init(dev, map); if (err) goto release; /* tsk - do_map_probe should take const char * */ mtd = do_map_probe((char *)info->map_name, &map->map); err = -ENODEV; if (!mtd) goto release; mtd->owner = THIS_MODULE; add_mtd_device(mtd); pci_set_drvdata(dev, mtd); return 0; release: if (map) { map->exit(dev, map); kfree(map); } pci_release_regions(dev); out: return err; } static void __devexit mtd_pci_remove(struct pci_dev *dev) { struct mtd_info *mtd = pci_get_drvdata(dev); struct map_pci_info *map = mtd->priv; del_mtd_device(mtd); map_destroy(mtd); map->exit(dev, map); kfree(map); pci_set_drvdata(dev, NULL); pci_release_regions(dev); } static struct pci_driver mtd_pci_driver = { .name = "MTD PCI", .probe = mtd_pci_probe, .remove = __devexit_p(mtd_pci_remove), .id_table = mtd_pci_ids, }; static int __init mtd_pci_maps_init(void) { return pci_register_driver(&mtd_pci_driver); } static void __exit mtd_pci_maps_exit(void) { pci_unregister_driver(&mtd_pci_driver); } module_init(mtd_pci_maps_init); module_exit(mtd_pci_maps_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); MODULE_DESCRIPTION("Generic PCI map driver"); MODULE_DEVICE_TABLE(pci, mtd_pci_ids);