]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * amd76xrom.c | |
3 | * | |
4 | * Normal mappings of chips in physical memory | |
69f34c98 | 5 | * $Id: amd76xrom.c,v 1.21 2005/11/07 11:14:26 gleixner Exp $ |
1da177e4 LT |
6 | */ |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/types.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/init.h> | |
12 | #include <asm/io.h> | |
13 | #include <linux/mtd/mtd.h> | |
14 | #include <linux/mtd/map.h> | |
15 | #include <linux/mtd/cfi.h> | |
16 | #include <linux/mtd/flashchip.h> | |
1da177e4 LT |
17 | #include <linux/pci.h> |
18 | #include <linux/pci_ids.h> | |
19 | #include <linux/list.h> | |
20 | ||
21 | ||
22 | #define xstr(s) str(s) | |
23 | #define str(s) #s | |
24 | #define MOD_NAME xstr(KBUILD_BASENAME) | |
25 | ||
26 | #define ADDRESS_NAME_LEN 18 | |
27 | ||
28 | #define ROM_PROBE_STEP_SIZE (64*1024) /* 64KiB */ | |
29 | ||
30 | struct amd76xrom_window { | |
31 | void __iomem *virt; | |
32 | unsigned long phys; | |
33 | unsigned long size; | |
34 | struct list_head maps; | |
35 | struct resource rsrc; | |
36 | struct pci_dev *pdev; | |
37 | }; | |
38 | ||
39 | struct amd76xrom_map_info { | |
40 | struct list_head list; | |
41 | struct map_info map; | |
42 | struct mtd_info *mtd; | |
43 | struct resource rsrc; | |
44 | char map_name[sizeof(MOD_NAME) + 2 + ADDRESS_NAME_LEN]; | |
45 | }; | |
46 | ||
47 | static struct amd76xrom_window amd76xrom_window = { | |
48 | .maps = LIST_HEAD_INIT(amd76xrom_window.maps), | |
49 | }; | |
50 | ||
51 | static void amd76xrom_cleanup(struct amd76xrom_window *window) | |
52 | { | |
53 | struct amd76xrom_map_info *map, *scratch; | |
54 | u8 byte; | |
55 | ||
56 | if (window->pdev) { | |
57 | /* Disable writes through the rom window */ | |
58 | pci_read_config_byte(window->pdev, 0x40, &byte); | |
59 | pci_write_config_byte(window->pdev, 0x40, byte & ~1); | |
dd8e9ed6 | 60 | pci_dev_put(window->pdev); |
1da177e4 LT |
61 | } |
62 | ||
63 | /* Free all of the mtd devices */ | |
64 | list_for_each_entry_safe(map, scratch, &window->maps, list) { | |
65 | if (map->rsrc.parent) { | |
66 | release_resource(&map->rsrc); | |
67 | } | |
68 | del_mtd_device(map->mtd); | |
69 | map_destroy(map->mtd); | |
70 | list_del(&map->list); | |
71 | kfree(map); | |
72 | } | |
69f34c98 | 73 | if (window->rsrc.parent) |
1da177e4 LT |
74 | release_resource(&window->rsrc); |
75 | ||
76 | if (window->virt) { | |
77 | iounmap(window->virt); | |
78 | window->virt = NULL; | |
79 | window->phys = 0; | |
80 | window->size = 0; | |
81 | window->pdev = NULL; | |
82 | } | |
83 | } | |
84 | ||
85 | ||
86 | static int __devinit amd76xrom_init_one (struct pci_dev *pdev, | |
87 | const struct pci_device_id *ent) | |
88 | { | |
89 | static char *rom_probe_types[] = { "cfi_probe", "jedec_probe", NULL }; | |
90 | u8 byte; | |
91 | struct amd76xrom_window *window = &amd76xrom_window; | |
92 | struct amd76xrom_map_info *map = NULL; | |
93 | unsigned long map_top; | |
94 | ||
dd8e9ed6 | 95 | /* Remember the pci dev I find the window in - already have a ref */ |
1da177e4 LT |
96 | window->pdev = pdev; |
97 | ||
98 | /* Assume the rom window is properly setup, and find it's size */ | |
99 | pci_read_config_byte(pdev, 0x43, &byte); | |
100 | if ((byte & ((1<<7)|(1<<6))) == ((1<<7)|(1<<6))) { | |
101 | window->phys = 0xffb00000; /* 5MiB */ | |
102 | } | |
103 | else if ((byte & (1<<7)) == (1<<7)) { | |
104 | window->phys = 0xffc00000; /* 4MiB */ | |
105 | } | |
106 | else { | |
107 | window->phys = 0xffff0000; /* 64KiB */ | |
108 | } | |
109 | window->size = 0xffffffffUL - window->phys + 1UL; | |
69f34c98 | 110 | |
1da177e4 LT |
111 | /* |
112 | * Try to reserve the window mem region. If this fails then | |
113 | * it is likely due to a fragment of the window being | |
114 | * "reseved" by the BIOS. In the case that the | |
115 | * request_mem_region() fails then once the rom size is | |
116 | * discovered we will try to reserve the unreserved fragment. | |
117 | */ | |
118 | window->rsrc.name = MOD_NAME; | |
119 | window->rsrc.start = window->phys; | |
120 | window->rsrc.end = window->phys + window->size - 1; | |
121 | window->rsrc.flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
122 | if (request_resource(&iomem_resource, &window->rsrc)) { | |
123 | window->rsrc.parent = NULL; | |
124 | printk(KERN_ERR MOD_NAME | |
125 | " %s(): Unable to register resource" | |
176dfc63 | 126 | " 0x%.16llx-0x%.16llx - kernel bug?\n", |
1da177e4 | 127 | __func__, |
176dfc63 GKH |
128 | (unsigned long long)window->rsrc.start, |
129 | (unsigned long long)window->rsrc.end); | |
1da177e4 LT |
130 | } |
131 | ||
132 | #if 0 | |
133 | ||
134 | /* Enable the selected rom window */ | |
135 | pci_read_config_byte(pdev, 0x43, &byte); | |
136 | pci_write_config_byte(pdev, 0x43, byte | rwindow->segen_bits); | |
137 | #endif | |
138 | ||
139 | /* Enable writes through the rom window */ | |
140 | pci_read_config_byte(pdev, 0x40, &byte); | |
141 | pci_write_config_byte(pdev, 0x40, byte | 1); | |
69f34c98 | 142 | |
1da177e4 LT |
143 | /* FIXME handle registers 0x80 - 0x8C the bios region locks */ |
144 | ||
145 | /* For write accesses caches are useless */ | |
146 | window->virt = ioremap_nocache(window->phys, window->size); | |
147 | if (!window->virt) { | |
148 | printk(KERN_ERR MOD_NAME ": ioremap(%08lx, %08lx) failed\n", | |
149 | window->phys, window->size); | |
150 | goto out; | |
151 | } | |
152 | ||
153 | /* Get the first address to look for an rom chip at */ | |
154 | map_top = window->phys; | |
155 | #if 1 | |
156 | /* The probe sequence run over the firmware hub lock | |
157 | * registers sets them to 0x7 (no access). | |
158 | * Probe at most the last 4M of the address space. | |
159 | */ | |
160 | if (map_top < 0xffc00000) { | |
161 | map_top = 0xffc00000; | |
162 | } | |
163 | #endif | |
164 | /* Loop through and look for rom chips */ | |
165 | while((map_top - 1) < 0xffffffffUL) { | |
166 | struct cfi_private *cfi; | |
167 | unsigned long offset; | |
168 | int i; | |
169 | ||
170 | if (!map) { | |
171 | map = kmalloc(sizeof(*map), GFP_KERNEL); | |
172 | } | |
173 | if (!map) { | |
174 | printk(KERN_ERR MOD_NAME ": kmalloc failed"); | |
175 | goto out; | |
176 | } | |
177 | memset(map, 0, sizeof(*map)); | |
178 | INIT_LIST_HEAD(&map->list); | |
179 | map->map.name = map->map_name; | |
180 | map->map.phys = map_top; | |
181 | offset = map_top - window->phys; | |
182 | map->map.virt = (void __iomem *) | |
183 | (((unsigned long)(window->virt)) + offset); | |
184 | map->map.size = 0xffffffffUL - map_top + 1UL; | |
185 | /* Set the name of the map to the address I am trying */ | |
186 | sprintf(map->map_name, "%s @%08lx", | |
187 | MOD_NAME, map->map.phys); | |
188 | ||
189 | /* There is no generic VPP support */ | |
69f34c98 | 190 | for(map->map.bankwidth = 32; map->map.bankwidth; |
1da177e4 LT |
191 | map->map.bankwidth >>= 1) |
192 | { | |
193 | char **probe_type; | |
194 | /* Skip bankwidths that are not supported */ | |
195 | if (!map_bankwidth_supported(map->map.bankwidth)) | |
196 | continue; | |
197 | ||
198 | /* Setup the map methods */ | |
199 | simple_map_init(&map->map); | |
200 | ||
201 | /* Try all of the probe methods */ | |
202 | probe_type = rom_probe_types; | |
203 | for(; *probe_type; probe_type++) { | |
204 | map->mtd = do_map_probe(*probe_type, &map->map); | |
205 | if (map->mtd) | |
206 | goto found; | |
207 | } | |
208 | } | |
209 | map_top += ROM_PROBE_STEP_SIZE; | |
210 | continue; | |
211 | found: | |
212 | /* Trim the size if we are larger than the map */ | |
213 | if (map->mtd->size > map->map.size) { | |
214 | printk(KERN_WARNING MOD_NAME | |
215 | " rom(%u) larger than window(%lu). fixing...\n", | |
216 | map->mtd->size, map->map.size); | |
217 | map->mtd->size = map->map.size; | |
218 | } | |
219 | if (window->rsrc.parent) { | |
220 | /* | |
221 | * Registering the MTD device in iomem may not be possible | |
222 | * if there is a BIOS "reserved" and BUSY range. If this | |
223 | * fails then continue anyway. | |
224 | */ | |
225 | map->rsrc.name = map->map_name; | |
226 | map->rsrc.start = map->map.phys; | |
227 | map->rsrc.end = map->map.phys + map->mtd->size - 1; | |
228 | map->rsrc.flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
229 | if (request_resource(&window->rsrc, &map->rsrc)) { | |
230 | printk(KERN_ERR MOD_NAME | |
231 | ": cannot reserve MTD resource\n"); | |
232 | map->rsrc.parent = NULL; | |
233 | } | |
234 | } | |
235 | ||
236 | /* Make the whole region visible in the map */ | |
237 | map->map.virt = window->virt; | |
238 | map->map.phys = window->phys; | |
239 | cfi = map->map.fldrv_priv; | |
240 | for(i = 0; i < cfi->numchips; i++) { | |
241 | cfi->chips[i].start += offset; | |
242 | } | |
69f34c98 | 243 | |
1da177e4 LT |
244 | /* Now that the mtd devices is complete claim and export it */ |
245 | map->mtd->owner = THIS_MODULE; | |
246 | if (add_mtd_device(map->mtd)) { | |
247 | map_destroy(map->mtd); | |
248 | map->mtd = NULL; | |
249 | goto out; | |
250 | } | |
251 | ||
252 | ||
253 | /* Calculate the new value of map_top */ | |
254 | map_top += map->mtd->size; | |
255 | ||
256 | /* File away the map structure */ | |
257 | list_add(&map->list, &window->maps); | |
258 | map = NULL; | |
259 | } | |
260 | ||
261 | out: | |
262 | /* Free any left over map structures */ | |
fa671646 | 263 | kfree(map); |
1da177e4 LT |
264 | /* See if I have any map structures */ |
265 | if (list_empty(&window->maps)) { | |
266 | amd76xrom_cleanup(window); | |
267 | return -ENODEV; | |
268 | } | |
269 | return 0; | |
270 | } | |
271 | ||
272 | ||
273 | static void __devexit amd76xrom_remove_one (struct pci_dev *pdev) | |
274 | { | |
275 | struct amd76xrom_window *window = &amd76xrom_window; | |
276 | ||
277 | amd76xrom_cleanup(window); | |
278 | } | |
279 | ||
280 | static struct pci_device_id amd76xrom_pci_tbl[] = { | |
69f34c98 | 281 | { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7410, |
1da177e4 | 282 | PCI_ANY_ID, PCI_ANY_ID, }, |
69f34c98 | 283 | { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7440, |
1da177e4 LT |
284 | PCI_ANY_ID, PCI_ANY_ID, }, |
285 | { PCI_VENDOR_ID_AMD, 0x7468 }, /* amd8111 support */ | |
286 | { 0, } | |
287 | }; | |
288 | ||
289 | MODULE_DEVICE_TABLE(pci, amd76xrom_pci_tbl); | |
290 | ||
291 | #if 0 | |
292 | static struct pci_driver amd76xrom_driver = { | |
293 | .name = MOD_NAME, | |
294 | .id_table = amd76xrom_pci_tbl, | |
295 | .probe = amd76xrom_init_one, | |
296 | .remove = amd76xrom_remove_one, | |
297 | }; | |
298 | #endif | |
299 | ||
300 | static int __init init_amd76xrom(void) | |
301 | { | |
302 | struct pci_dev *pdev; | |
303 | struct pci_device_id *id; | |
304 | pdev = NULL; | |
305 | for(id = amd76xrom_pci_tbl; id->vendor; id++) { | |
dd8e9ed6 | 306 | pdev = pci_get_device(id->vendor, id->device, NULL); |
1da177e4 LT |
307 | if (pdev) { |
308 | break; | |
309 | } | |
310 | } | |
311 | if (pdev) { | |
312 | return amd76xrom_init_one(pdev, &amd76xrom_pci_tbl[0]); | |
313 | } | |
314 | return -ENXIO; | |
315 | #if 0 | |
ff3bc4eb | 316 | return pci_register_driver(&amd76xrom_driver); |
1da177e4 LT |
317 | #endif |
318 | } | |
319 | ||
320 | static void __exit cleanup_amd76xrom(void) | |
321 | { | |
322 | amd76xrom_remove_one(amd76xrom_window.pdev); | |
323 | } | |
324 | ||
325 | module_init(init_amd76xrom); | |
326 | module_exit(cleanup_amd76xrom); | |
327 | ||
328 | MODULE_LICENSE("GPL"); | |
329 | MODULE_AUTHOR("Eric Biederman <ebiederman@lnxi.com>"); | |
330 | MODULE_DESCRIPTION("MTD map driver for BIOS chips on the AMD76X southbridge"); | |
331 |