2 * linux/drivers/mtd/maps/pci.c
4 * Copyright (C) 2001 Russell King, All rights reserved.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * Generic PCI memory map driver. We support the following boards:
11 * - Intel IQ80310 ATU.
12 * - Intel EBSA285 (blank rom programming mode). Tested working 27/09/2001
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/pci.h>
17 #include <linux/init.h>
18 #include <linux/slab.h>
20 #include <linux/mtd/mtd.h>
21 #include <linux/mtd/map.h>
22 #include <linux/mtd/partitions.h>
27 int (*init)(struct pci_dev *dev, struct map_pci_info *map);
28 void (*exit)(struct pci_dev *dev, struct map_pci_info *map);
29 unsigned long (*translate)(struct map_pci_info *map, unsigned long ofs);
36 void (*exit)(struct pci_dev *dev, struct map_pci_info *map);
37 unsigned long (*translate)(struct map_pci_info *map, unsigned long ofs);
41 static map_word mtd_pci_read8(struct map_info *_map, unsigned long ofs)
43 struct map_pci_info *map = (struct map_pci_info *)_map;
45 val.x[0]= readb(map->base + map->translate(map, ofs));
49 static map_word mtd_pci_read32(struct map_info *_map, unsigned long ofs)
51 struct map_pci_info *map = (struct map_pci_info *)_map;
53 val.x[0] = readl(map->base + map->translate(map, ofs));
57 static void mtd_pci_copyfrom(struct map_info *_map, void *to, unsigned long from, ssize_t len)
59 struct map_pci_info *map = (struct map_pci_info *)_map;
60 memcpy_fromio(to, map->base + map->translate(map, from), len);
63 static void mtd_pci_write8(struct map_info *_map, map_word val, unsigned long ofs)
65 struct map_pci_info *map = (struct map_pci_info *)_map;
66 writeb(val.x[0], map->base + map->translate(map, ofs));
69 static void mtd_pci_write32(struct map_info *_map, map_word val, unsigned long ofs)
71 struct map_pci_info *map = (struct map_pci_info *)_map;
72 writel(val.x[0], map->base + map->translate(map, ofs));
75 static void mtd_pci_copyto(struct map_info *_map, unsigned long to, const void *from, ssize_t len)
77 struct map_pci_info *map = (struct map_pci_info *)_map;
78 memcpy_toio(map->base + map->translate(map, to), from, len);
81 static const struct map_info mtd_pci_map = {
83 .copy_from = mtd_pci_copyfrom,
84 .copy_to = mtd_pci_copyto,
88 * Intel IOP80310 Flash driver
92 intel_iq80310_init(struct pci_dev *dev, struct map_pci_info *map)
96 map->map.bankwidth = 1;
97 map->map.read = mtd_pci_read8,
98 map->map.write = mtd_pci_write8,
100 map->map.size = 0x00800000;
101 map->base = ioremap_nocache(pci_resource_start(dev, 0),
102 pci_resource_len(dev, 0));
108 * We want to base the memory window at Xscale
109 * bus address 0, not 0x1000.
111 pci_read_config_dword(dev, 0x44, &win_base);
112 pci_write_config_dword(dev, 0x44, 0);
114 map->map.map_priv_2 = win_base;
120 intel_iq80310_exit(struct pci_dev *dev, struct map_pci_info *map)
124 pci_write_config_dword(dev, 0x44, map->map.map_priv_2);
128 intel_iq80310_translate(struct map_pci_info *map, unsigned long ofs)
130 unsigned long page_addr = ofs & 0x00400000;
133 * This mundges the flash location so we avoid
134 * the first 80 bytes (they appear to read nonsense).
137 writel(0x00000008, map->base + 0x1558);
138 writel(0x00000000, map->base + 0x1550);
140 writel(0x00000007, map->base + 0x1558);
141 writel(0x00800000, map->base + 0x1550);
148 static struct mtd_pci_info intel_iq80310_info = {
149 .init = intel_iq80310_init,
150 .exit = intel_iq80310_exit,
151 .translate = intel_iq80310_translate,
152 .map_name = "cfi_probe",
156 * Intel DC21285 driver
160 intel_dc21285_init(struct pci_dev *dev, struct map_pci_info *map)
162 unsigned long base, len;
164 base = pci_resource_start(dev, PCI_ROM_RESOURCE);
165 len = pci_resource_len(dev, PCI_ROM_RESOURCE);
171 base = pci_resource_start(dev, 2);
172 len = pci_resource_len(dev, 2);
175 * We need to re-allocate PCI BAR2 address range to the
176 * PCI ROM BAR, and disable PCI BAR2.
180 * Hmm, if an address was allocated to the ROM resource, but
181 * not enabled, should we be allocating a new resource for it
182 * or simply enabling it?
185 printk("%s: enabling expansion ROM\n", pci_name(dev));
191 map->map.bankwidth = 4;
192 map->map.read = mtd_pci_read32,
193 map->map.write = mtd_pci_write32,
195 map->base = ioremap_nocache(base, len);
204 intel_dc21285_exit(struct pci_dev *dev, struct map_pci_info *map)
210 * We need to undo the PCI BAR2/PCI ROM BAR address alteration.
212 pci_disable_rom(dev);
216 intel_dc21285_translate(struct map_pci_info *map, unsigned long ofs)
218 return ofs & 0x00ffffc0 ? ofs : (ofs ^ (1 << 5));
221 static struct mtd_pci_info intel_dc21285_info = {
222 .init = intel_dc21285_init,
223 .exit = intel_dc21285_exit,
224 .translate = intel_dc21285_translate,
225 .map_name = "jedec_probe",
229 * PCI device ID table
232 static struct pci_device_id mtd_pci_ids[] = {
234 .vendor = PCI_VENDOR_ID_INTEL,
236 .subvendor = PCI_ANY_ID,
237 .subdevice = PCI_ANY_ID,
238 .class = PCI_CLASS_MEMORY_OTHER << 8,
239 .class_mask = 0xffff00,
240 .driver_data = (unsigned long)&intel_iq80310_info,
243 .vendor = PCI_VENDOR_ID_DEC,
244 .device = PCI_DEVICE_ID_DEC_21285,
245 .subvendor = 0, /* DC21285 defaults to 0 on reset */
246 .subdevice = 0, /* DC21285 defaults to 0 on reset */
247 .driver_data = (unsigned long)&intel_dc21285_info,
253 * Generic code follows.
256 static int mtd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
258 struct mtd_pci_info *info = (struct mtd_pci_info *)id->driver_data;
259 struct map_pci_info *map = NULL;
260 struct mtd_info *mtd = NULL;
263 err = pci_enable_device(dev);
267 err = pci_request_regions(dev, "pci mtd");
271 map = kmalloc(sizeof(*map), GFP_KERNEL);
276 map->map = mtd_pci_map;
277 map->map.name = pci_name(dev);
279 map->exit = info->exit;
280 map->translate = info->translate;
282 err = info->init(dev, map);
286 mtd = do_map_probe(info->map_name, &map->map);
291 mtd->owner = THIS_MODULE;
292 mtd_device_register(mtd, NULL, 0);
294 pci_set_drvdata(dev, mtd);
304 pci_release_regions(dev);
309 static void mtd_pci_remove(struct pci_dev *dev)
311 struct mtd_info *mtd = pci_get_drvdata(dev);
312 struct map_pci_info *map = mtd->priv;
314 mtd_device_unregister(mtd);
319 pci_set_drvdata(dev, NULL);
320 pci_release_regions(dev);
323 static struct pci_driver mtd_pci_driver = {
325 .probe = mtd_pci_probe,
326 .remove = mtd_pci_remove,
327 .id_table = mtd_pci_ids,
330 module_pci_driver(mtd_pci_driver);
332 MODULE_LICENSE("GPL");
333 MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
334 MODULE_DESCRIPTION("Generic PCI map driver");
335 MODULE_DEVICE_TABLE(pci, mtd_pci_ids);