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 * $Id: pci.c,v 1.10 2005/03/18 14:04:35 gleixner Exp $
12 * Generic PCI memory map driver. We support the following boards:
13 * - Intel IQ80310 ATU.
14 * - Intel EBSA285 (blank rom programming mode). Tested working 27/09/2001
16 #include <linux/module.h>
17 #include <linux/kernel.h>
18 #include <linux/pci.h>
19 #include <linux/init.h>
21 #include <linux/mtd/mtd.h>
22 #include <linux/mtd/map.h>
23 #include <linux/mtd/partitions.h>
28 int (*init)(struct pci_dev *dev, struct map_pci_info *map);
29 void (*exit)(struct pci_dev *dev, struct map_pci_info *map);
30 unsigned long (*translate)(struct map_pci_info *map, unsigned long ofs);
37 void (*exit)(struct pci_dev *dev, struct map_pci_info *map);
38 unsigned long (*translate)(struct map_pci_info *map, unsigned long ofs);
42 static map_word mtd_pci_read8(struct map_info *_map, unsigned long ofs)
44 struct map_pci_info *map = (struct map_pci_info *)_map;
46 val.x[0]= readb(map->base + map->translate(map, ofs));
47 // printk("read8 : %08lx => %02x\n", ofs, val.x[0]);
52 static map_word mtd_pci_read16(struct map_info *_map, unsigned long ofs)
54 struct map_pci_info *map = (struct map_pci_info *)_map;
56 val.x[0] = readw(map->base + map->translate(map, ofs));
57 // printk("read16: %08lx => %04x\n", ofs, val.x[0]);
61 static map_word mtd_pci_read32(struct map_info *_map, unsigned long ofs)
63 struct map_pci_info *map = (struct map_pci_info *)_map;
65 val.x[0] = readl(map->base + map->translate(map, ofs));
66 // printk("read32: %08lx => %08x\n", ofs, val.x[0]);
70 static void mtd_pci_copyfrom(struct map_info *_map, void *to, unsigned long from, ssize_t len)
72 struct map_pci_info *map = (struct map_pci_info *)_map;
73 memcpy_fromio(to, map->base + map->translate(map, from), len);
76 static void mtd_pci_write8(struct map_info *_map, map_word val, unsigned long ofs)
78 struct map_pci_info *map = (struct map_pci_info *)_map;
79 // printk("write8 : %08lx <= %02x\n", ofs, val.x[0]);
80 writeb(val.x[0], map->base + map->translate(map, ofs));
84 static void mtd_pci_write16(struct map_info *_map, map_word val, unsigned long ofs)
86 struct map_pci_info *map = (struct map_pci_info *)_map;
87 // printk("write16: %08lx <= %04x\n", ofs, val.x[0]);
88 writew(val.x[0], map->base + map->translate(map, ofs));
91 static void mtd_pci_write32(struct map_info *_map, map_word val, unsigned long ofs)
93 struct map_pci_info *map = (struct map_pci_info *)_map;
94 // printk("write32: %08lx <= %08x\n", ofs, val.x[0]);
95 writel(val.x[0], map->base + map->translate(map, ofs));
98 static void mtd_pci_copyto(struct map_info *_map, unsigned long to, const void *from, ssize_t len)
100 struct map_pci_info *map = (struct map_pci_info *)_map;
101 memcpy_toio(map->base + map->translate(map, to), from, len);
104 static struct map_info mtd_pci_map = {
106 .copy_from = mtd_pci_copyfrom,
107 .copy_to = mtd_pci_copyto,
111 * Intel IOP80310 Flash driver
115 intel_iq80310_init(struct pci_dev *dev, struct map_pci_info *map)
119 map->map.bankwidth = 1;
120 map->map.read = mtd_pci_read8,
121 map->map.write = mtd_pci_write8,
123 map->map.size = 0x00800000;
124 map->base = ioremap_nocache(pci_resource_start(dev, 0),
125 pci_resource_len(dev, 0));
131 * We want to base the memory window at Xscale
132 * bus address 0, not 0x1000.
134 pci_read_config_dword(dev, 0x44, &win_base);
135 pci_write_config_dword(dev, 0x44, 0);
137 map->map.map_priv_2 = win_base;
143 intel_iq80310_exit(struct pci_dev *dev, struct map_pci_info *map)
147 pci_write_config_dword(dev, 0x44, map->map.map_priv_2);
151 intel_iq80310_translate(struct map_pci_info *map, unsigned long ofs)
153 unsigned long page_addr = ofs & 0x00400000;
156 * This mundges the flash location so we avoid
157 * the first 80 bytes (they appear to read nonsense).
160 writel(0x00000008, map->base + 0x1558);
161 writel(0x00000000, map->base + 0x1550);
163 writel(0x00000007, map->base + 0x1558);
164 writel(0x00800000, map->base + 0x1550);
171 static struct mtd_pci_info intel_iq80310_info = {
172 .init = intel_iq80310_init,
173 .exit = intel_iq80310_exit,
174 .translate = intel_iq80310_translate,
175 .map_name = "cfi_probe",
179 * Intel DC21285 driver
183 intel_dc21285_init(struct pci_dev *dev, struct map_pci_info *map)
185 unsigned long base, len;
187 base = pci_resource_start(dev, PCI_ROM_RESOURCE);
188 len = pci_resource_len(dev, PCI_ROM_RESOURCE);
194 base = pci_resource_start(dev, 2);
195 len = pci_resource_len(dev, 2);
198 * We need to re-allocate PCI BAR2 address range to the
199 * PCI ROM BAR, and disable PCI BAR2.
203 * Hmm, if an address was allocated to the ROM resource, but
204 * not enabled, should we be allocating a new resource for it
205 * or simply enabling it?
207 if (!(pci_resource_flags(dev, PCI_ROM_RESOURCE) &
208 IORESOURCE_ROM_ENABLE)) {
210 pci_resource_flags(dev, PCI_ROM_RESOURCE) |= IORESOURCE_ROM_ENABLE;
211 pci_read_config_dword(dev, PCI_ROM_ADDRESS, &val);
212 val |= PCI_ROM_ADDRESS_ENABLE;
213 pci_write_config_dword(dev, PCI_ROM_ADDRESS, val);
214 printk("%s: enabling expansion ROM\n", pci_name(dev));
221 map->map.bankwidth = 4;
222 map->map.read = mtd_pci_read32,
223 map->map.write = mtd_pci_write32,
225 map->base = ioremap_nocache(base, len);
234 intel_dc21285_exit(struct pci_dev *dev, struct map_pci_info *map)
242 * We need to undo the PCI BAR2/PCI ROM BAR address alteration.
244 pci_resource_flags(dev, PCI_ROM_RESOURCE) &= ~IORESOURCE_ROM_ENABLE;
245 pci_read_config_dword(dev, PCI_ROM_ADDRESS, &val);
246 val &= ~PCI_ROM_ADDRESS_ENABLE;
247 pci_write_config_dword(dev, PCI_ROM_ADDRESS, val);
251 intel_dc21285_translate(struct map_pci_info *map, unsigned long ofs)
253 return ofs & 0x00ffffc0 ? ofs : (ofs ^ (1 << 5));
256 static struct mtd_pci_info intel_dc21285_info = {
257 .init = intel_dc21285_init,
258 .exit = intel_dc21285_exit,
259 .translate = intel_dc21285_translate,
260 .map_name = "jedec_probe",
264 * PCI device ID table
267 static struct pci_device_id mtd_pci_ids[] = {
269 .vendor = PCI_VENDOR_ID_INTEL,
271 .subvendor = PCI_ANY_ID,
272 .subdevice = PCI_ANY_ID,
273 .class = PCI_CLASS_MEMORY_OTHER << 8,
274 .class_mask = 0xffff00,
275 .driver_data = (unsigned long)&intel_iq80310_info,
278 .vendor = PCI_VENDOR_ID_DEC,
279 .device = PCI_DEVICE_ID_DEC_21285,
280 .subvendor = 0, /* DC21285 defaults to 0 on reset */
281 .subdevice = 0, /* DC21285 defaults to 0 on reset */
282 .driver_data = (unsigned long)&intel_dc21285_info,
288 * Generic code follows.
292 mtd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
294 struct mtd_pci_info *info = (struct mtd_pci_info *)id->driver_data;
295 struct map_pci_info *map = NULL;
296 struct mtd_info *mtd = NULL;
299 err = pci_enable_device(dev);
303 err = pci_request_regions(dev, "pci mtd");
307 map = kmalloc(sizeof(*map), GFP_KERNEL);
312 map->map = mtd_pci_map;
313 map->map.name = pci_name(dev);
315 map->exit = info->exit;
316 map->translate = info->translate;
318 err = info->init(dev, map);
322 /* tsk - do_map_probe should take const char * */
323 mtd = do_map_probe((char *)info->map_name, &map->map);
328 mtd->owner = THIS_MODULE;
331 pci_set_drvdata(dev, mtd);
344 pci_release_regions(dev);
349 static void __devexit
350 mtd_pci_remove(struct pci_dev *dev)
352 struct mtd_info *mtd = pci_get_drvdata(dev);
353 struct map_pci_info *map = mtd->priv;
360 pci_set_drvdata(dev, NULL);
361 pci_release_regions(dev);
364 static struct pci_driver mtd_pci_driver = {
366 .probe = mtd_pci_probe,
367 .remove = __devexit_p(mtd_pci_remove),
368 .id_table = mtd_pci_ids,
371 static int __init mtd_pci_maps_init(void)
373 return pci_register_driver(&mtd_pci_driver);
376 static void __exit mtd_pci_maps_exit(void)
378 pci_unregister_driver(&mtd_pci_driver);
381 module_init(mtd_pci_maps_init);
382 module_exit(mtd_pci_maps_exit);
384 MODULE_LICENSE("GPL");
385 MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
386 MODULE_DESCRIPTION("Generic PCI map driver");
387 MODULE_DEVICE_TABLE(pci, mtd_pci_ids);