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1da177e4 LT |
1 | /* |
2 | * linux/drivers/mtd/maps/pci.c | |
3 | * | |
4 | * Copyright (C) 2001 Russell King, All rights reserved. | |
5 | * | |
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. | |
9 | * | |
1da177e4 LT |
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 | |
13 | */ | |
14 | #include <linux/module.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/pci.h> | |
17 | #include <linux/init.h> | |
4e57b681 | 18 | #include <linux/slab.h> |
1da177e4 LT |
19 | |
20 | #include <linux/mtd/mtd.h> | |
21 | #include <linux/mtd/map.h> | |
22 | #include <linux/mtd/partitions.h> | |
23 | ||
24 | struct map_pci_info; | |
25 | ||
26 | struct mtd_pci_info { | |
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); | |
30 | const char *map_name; | |
31 | }; | |
32 | ||
33 | struct map_pci_info { | |
34 | struct map_info map; | |
35 | void __iomem *base; | |
36 | void (*exit)(struct pci_dev *dev, struct map_pci_info *map); | |
37 | unsigned long (*translate)(struct map_pci_info *map, unsigned long ofs); | |
38 | struct pci_dev *dev; | |
69f34c98 | 39 | }; |
1da177e4 LT |
40 | |
41 | static map_word mtd_pci_read8(struct map_info *_map, unsigned long ofs) | |
42 | { | |
43 | struct map_pci_info *map = (struct map_pci_info *)_map; | |
44 | map_word val; | |
45 | val.x[0]= readb(map->base + map->translate(map, ofs)); | |
1da177e4 LT |
46 | return val; |
47 | } | |
48 | ||
1da177e4 LT |
49 | static map_word mtd_pci_read32(struct map_info *_map, unsigned long ofs) |
50 | { | |
51 | struct map_pci_info *map = (struct map_pci_info *)_map; | |
52 | map_word val; | |
53 | val.x[0] = readl(map->base + map->translate(map, ofs)); | |
1da177e4 LT |
54 | return val; |
55 | } | |
56 | ||
57 | static void mtd_pci_copyfrom(struct map_info *_map, void *to, unsigned long from, ssize_t len) | |
58 | { | |
59 | struct map_pci_info *map = (struct map_pci_info *)_map; | |
60 | memcpy_fromio(to, map->base + map->translate(map, from), len); | |
61 | } | |
62 | ||
63 | static void mtd_pci_write8(struct map_info *_map, map_word val, unsigned long ofs) | |
64 | { | |
65 | struct map_pci_info *map = (struct map_pci_info *)_map; | |
1da177e4 LT |
66 | writeb(val.x[0], map->base + map->translate(map, ofs)); |
67 | } | |
68 | ||
1da177e4 LT |
69 | static void mtd_pci_write32(struct map_info *_map, map_word val, unsigned long ofs) |
70 | { | |
71 | struct map_pci_info *map = (struct map_pci_info *)_map; | |
1da177e4 LT |
72 | writel(val.x[0], map->base + map->translate(map, ofs)); |
73 | } | |
74 | ||
75 | static void mtd_pci_copyto(struct map_info *_map, unsigned long to, const void *from, ssize_t len) | |
76 | { | |
77 | struct map_pci_info *map = (struct map_pci_info *)_map; | |
78 | memcpy_toio(map->base + map->translate(map, to), from, len); | |
79 | } | |
80 | ||
7ac571f8 | 81 | static const struct map_info mtd_pci_map = { |
1da177e4 LT |
82 | .phys = NO_XIP, |
83 | .copy_from = mtd_pci_copyfrom, | |
84 | .copy_to = mtd_pci_copyto, | |
85 | }; | |
86 | ||
87 | /* | |
88 | * Intel IOP80310 Flash driver | |
89 | */ | |
90 | ||
91 | static int | |
92 | intel_iq80310_init(struct pci_dev *dev, struct map_pci_info *map) | |
93 | { | |
94 | u32 win_base; | |
95 | ||
96 | map->map.bankwidth = 1; | |
97 | map->map.read = mtd_pci_read8, | |
98 | map->map.write = mtd_pci_write8, | |
99 | ||
100 | map->map.size = 0x00800000; | |
101 | map->base = ioremap_nocache(pci_resource_start(dev, 0), | |
102 | pci_resource_len(dev, 0)); | |
103 | ||
104 | if (!map->base) | |
105 | return -ENOMEM; | |
106 | ||
107 | /* | |
108 | * We want to base the memory window at Xscale | |
109 | * bus address 0, not 0x1000. | |
110 | */ | |
111 | pci_read_config_dword(dev, 0x44, &win_base); | |
112 | pci_write_config_dword(dev, 0x44, 0); | |
113 | ||
114 | map->map.map_priv_2 = win_base; | |
115 | ||
116 | return 0; | |
117 | } | |
118 | ||
119 | static void | |
120 | intel_iq80310_exit(struct pci_dev *dev, struct map_pci_info *map) | |
121 | { | |
122 | if (map->base) | |
123 | iounmap(map->base); | |
124 | pci_write_config_dword(dev, 0x44, map->map.map_priv_2); | |
125 | } | |
126 | ||
127 | static unsigned long | |
128 | intel_iq80310_translate(struct map_pci_info *map, unsigned long ofs) | |
129 | { | |
130 | unsigned long page_addr = ofs & 0x00400000; | |
131 | ||
132 | /* | |
133 | * This mundges the flash location so we avoid | |
134 | * the first 80 bytes (they appear to read nonsense). | |
135 | */ | |
136 | if (page_addr) { | |
137 | writel(0x00000008, map->base + 0x1558); | |
138 | writel(0x00000000, map->base + 0x1550); | |
139 | } else { | |
140 | writel(0x00000007, map->base + 0x1558); | |
141 | writel(0x00800000, map->base + 0x1550); | |
142 | ofs += 0x00800000; | |
143 | } | |
144 | ||
145 | return ofs; | |
146 | } | |
147 | ||
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", | |
153 | }; | |
154 | ||
155 | /* | |
156 | * Intel DC21285 driver | |
157 | */ | |
158 | ||
159 | static int | |
160 | intel_dc21285_init(struct pci_dev *dev, struct map_pci_info *map) | |
161 | { | |
162 | unsigned long base, len; | |
163 | ||
164 | base = pci_resource_start(dev, PCI_ROM_RESOURCE); | |
165 | len = pci_resource_len(dev, PCI_ROM_RESOURCE); | |
166 | ||
167 | if (!len || !base) { | |
168 | /* | |
169 | * No ROM resource | |
170 | */ | |
171 | base = pci_resource_start(dev, 2); | |
172 | len = pci_resource_len(dev, 2); | |
173 | ||
174 | /* | |
175 | * We need to re-allocate PCI BAR2 address range to the | |
176 | * PCI ROM BAR, and disable PCI BAR2. | |
177 | */ | |
178 | } else { | |
179 | /* | |
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? | |
183 | */ | |
4ab13943 AC |
184 | pci_enable_rom(dev); |
185 | printk("%s: enabling expansion ROM\n", pci_name(dev)); | |
1da177e4 LT |
186 | } |
187 | ||
188 | if (!len || !base) | |
189 | return -ENXIO; | |
190 | ||
191 | map->map.bankwidth = 4; | |
192 | map->map.read = mtd_pci_read32, | |
193 | map->map.write = mtd_pci_write32, | |
194 | map->map.size = len; | |
195 | map->base = ioremap_nocache(base, len); | |
196 | ||
197 | if (!map->base) | |
198 | return -ENOMEM; | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | static void | |
204 | intel_dc21285_exit(struct pci_dev *dev, struct map_pci_info *map) | |
205 | { | |
1da177e4 LT |
206 | if (map->base) |
207 | iounmap(map->base); | |
208 | ||
209 | /* | |
210 | * We need to undo the PCI BAR2/PCI ROM BAR address alteration. | |
211 | */ | |
4ab13943 | 212 | pci_disable_rom(dev); |
1da177e4 LT |
213 | } |
214 | ||
215 | static unsigned long | |
216 | intel_dc21285_translate(struct map_pci_info *map, unsigned long ofs) | |
217 | { | |
218 | return ofs & 0x00ffffc0 ? ofs : (ofs ^ (1 << 5)); | |
219 | } | |
220 | ||
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", | |
226 | }; | |
227 | ||
228 | /* | |
229 | * PCI device ID table | |
230 | */ | |
231 | ||
232 | static struct pci_device_id mtd_pci_ids[] = { | |
233 | { | |
234 | .vendor = PCI_VENDOR_ID_INTEL, | |
235 | .device = 0x530d, | |
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, | |
241 | }, | |
242 | { | |
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, | |
248 | }, | |
249 | { 0, } | |
250 | }; | |
251 | ||
252 | /* | |
253 | * Generic code follows. | |
254 | */ | |
255 | ||
d8929942 | 256 | static int mtd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) |
1da177e4 LT |
257 | { |
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; | |
261 | int err; | |
262 | ||
263 | err = pci_enable_device(dev); | |
264 | if (err) | |
265 | goto out; | |
266 | ||
267 | err = pci_request_regions(dev, "pci mtd"); | |
268 | if (err) | |
269 | goto out; | |
270 | ||
271 | map = kmalloc(sizeof(*map), GFP_KERNEL); | |
272 | err = -ENOMEM; | |
273 | if (!map) | |
274 | goto release; | |
275 | ||
276 | map->map = mtd_pci_map; | |
277 | map->map.name = pci_name(dev); | |
278 | map->dev = dev; | |
279 | map->exit = info->exit; | |
280 | map->translate = info->translate; | |
281 | ||
282 | err = info->init(dev, map); | |
283 | if (err) | |
284 | goto release; | |
285 | ||
0984c891 | 286 | mtd = do_map_probe(info->map_name, &map->map); |
1da177e4 LT |
287 | err = -ENODEV; |
288 | if (!mtd) | |
289 | goto release; | |
290 | ||
291 | mtd->owner = THIS_MODULE; | |
ee0e87b1 | 292 | mtd_device_register(mtd, NULL, 0); |
1da177e4 LT |
293 | |
294 | pci_set_drvdata(dev, mtd); | |
295 | ||
296 | return 0; | |
297 | ||
298 | release: | |
1da177e4 LT |
299 | if (map) { |
300 | map->exit(dev, map); | |
301 | kfree(map); | |
302 | } | |
303 | ||
304 | pci_release_regions(dev); | |
305 | out: | |
306 | return err; | |
307 | } | |
308 | ||
d8929942 | 309 | static void mtd_pci_remove(struct pci_dev *dev) |
1da177e4 LT |
310 | { |
311 | struct mtd_info *mtd = pci_get_drvdata(dev); | |
312 | struct map_pci_info *map = mtd->priv; | |
313 | ||
ee0e87b1 | 314 | mtd_device_unregister(mtd); |
1da177e4 LT |
315 | map_destroy(mtd); |
316 | map->exit(dev, map); | |
317 | kfree(map); | |
318 | ||
319 | pci_set_drvdata(dev, NULL); | |
320 | pci_release_regions(dev); | |
321 | } | |
322 | ||
323 | static struct pci_driver mtd_pci_driver = { | |
324 | .name = "MTD PCI", | |
325 | .probe = mtd_pci_probe, | |
5153b88c | 326 | .remove = mtd_pci_remove, |
1da177e4 LT |
327 | .id_table = mtd_pci_ids, |
328 | }; | |
329 | ||
4d16cd65 | 330 | module_pci_driver(mtd_pci_driver); |
1da177e4 LT |
331 | |
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); |