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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/drivers/mtd/maps/pci.c
4 *
5 * Copyright (C) 2001 Russell King, All rights reserved.
6 *
7 * Generic PCI memory map driver. We support the following boards:
8 * - Intel IQ80310 ATU.
9 * - Intel EBSA285 (blank rom programming mode). Tested working 27/09/2001
10 */
11#include <linux/module.h>
12#include <linux/kernel.h>
13#include <linux/pci.h>
14#include <linux/slab.h>
15
16#include <linux/mtd/mtd.h>
17#include <linux/mtd/map.h>
18#include <linux/mtd/partitions.h>
19
20struct map_pci_info;
21
22struct mtd_pci_info {
23 int (*init)(struct pci_dev *dev, struct map_pci_info *map);
24 void (*exit)(struct pci_dev *dev, struct map_pci_info *map);
25 unsigned long (*translate)(struct map_pci_info *map, unsigned long ofs);
26 const char *map_name;
27};
28
29struct map_pci_info {
30 struct map_info map;
31 void __iomem *base;
32 void (*exit)(struct pci_dev *dev, struct map_pci_info *map);
33 unsigned long (*translate)(struct map_pci_info *map, unsigned long ofs);
34 struct pci_dev *dev;
35};
36
37static map_word mtd_pci_read8(struct map_info *_map, unsigned long ofs)
38{
39 struct map_pci_info *map = (struct map_pci_info *)_map;
40 map_word val;
41 val.x[0]= readb(map->base + map->translate(map, ofs));
42 return val;
43}
44
45static map_word mtd_pci_read32(struct map_info *_map, unsigned long ofs)
46{
47 struct map_pci_info *map = (struct map_pci_info *)_map;
48 map_word val;
49 val.x[0] = readl(map->base + map->translate(map, ofs));
50 return val;
51}
52
53static void mtd_pci_copyfrom(struct map_info *_map, void *to, unsigned long from, ssize_t len)
54{
55 struct map_pci_info *map = (struct map_pci_info *)_map;
56 memcpy_fromio(to, map->base + map->translate(map, from), len);
57}
58
59static void mtd_pci_write8(struct map_info *_map, map_word val, unsigned long ofs)
60{
61 struct map_pci_info *map = (struct map_pci_info *)_map;
62 writeb(val.x[0], map->base + map->translate(map, ofs));
63}
64
65static void mtd_pci_write32(struct map_info *_map, map_word val, unsigned long ofs)
66{
67 struct map_pci_info *map = (struct map_pci_info *)_map;
68 writel(val.x[0], map->base + map->translate(map, ofs));
69}
70
71static void mtd_pci_copyto(struct map_info *_map, unsigned long to, const void *from, ssize_t len)
72{
73 struct map_pci_info *map = (struct map_pci_info *)_map;
74 memcpy_toio(map->base + map->translate(map, to), from, len);
75}
76
77static const struct map_info mtd_pci_map = {
78 .phys = NO_XIP,
79 .copy_from = mtd_pci_copyfrom,
80 .copy_to = mtd_pci_copyto,
81};
82
83/*
84 * Intel IOP80310 Flash driver
85 */
86
87static int
88intel_iq80310_init(struct pci_dev *dev, struct map_pci_info *map)
89{
90 u32 win_base;
91
92 map->map.bankwidth = 1;
93 map->map.read = mtd_pci_read8;
94 map->map.write = mtd_pci_write8;
95
96 map->map.size = 0x00800000;
97 map->base = ioremap(pci_resource_start(dev, 0),
98 pci_resource_len(dev, 0));
99
100 if (!map->base)
101 return -ENOMEM;
102
103 /*
104 * We want to base the memory window at Xscale
105 * bus address 0, not 0x1000.
106 */
107 pci_read_config_dword(dev, 0x44, &win_base);
108 pci_write_config_dword(dev, 0x44, 0);
109
110 map->map.map_priv_2 = win_base;
111
112 return 0;
113}
114
115static void
116intel_iq80310_exit(struct pci_dev *dev, struct map_pci_info *map)
117{
118 if (map->base)
119 iounmap(map->base);
120 pci_write_config_dword(dev, 0x44, map->map.map_priv_2);
121}
122
123static unsigned long
124intel_iq80310_translate(struct map_pci_info *map, unsigned long ofs)
125{
126 unsigned long page_addr = ofs & 0x00400000;
127
128 /*
129 * This mundges the flash location so we avoid
130 * the first 80 bytes (they appear to read nonsense).
131 */
132 if (page_addr) {
133 writel(0x00000008, map->base + 0x1558);
134 writel(0x00000000, map->base + 0x1550);
135 } else {
136 writel(0x00000007, map->base + 0x1558);
137 writel(0x00800000, map->base + 0x1550);
138 ofs += 0x00800000;
139 }
140
141 return ofs;
142}
143
144static struct mtd_pci_info intel_iq80310_info = {
145 .init = intel_iq80310_init,
146 .exit = intel_iq80310_exit,
147 .translate = intel_iq80310_translate,
148 .map_name = "cfi_probe",
149};
150
151/*
152 * Intel DC21285 driver
153 */
154
155static int
156intel_dc21285_init(struct pci_dev *dev, struct map_pci_info *map)
157{
158 unsigned long base, len;
159
160 base = pci_resource_start(dev, PCI_ROM_RESOURCE);
161 len = pci_resource_len(dev, PCI_ROM_RESOURCE);
162
163 if (!len || !base) {
164 /*
165 * No ROM resource
166 */
167 base = pci_resource_start(dev, 2);
168 len = pci_resource_len(dev, 2);
169
170 /*
171 * We need to re-allocate PCI BAR2 address range to the
172 * PCI ROM BAR, and disable PCI BAR2.
173 */
174 } else {
175 /*
176 * Hmm, if an address was allocated to the ROM resource, but
177 * not enabled, should we be allocating a new resource for it
178 * or simply enabling it?
179 */
180 pci_enable_rom(dev);
181 printk("%s: enabling expansion ROM\n", pci_name(dev));
182 }
183
184 if (!len || !base)
185 return -ENXIO;
186
187 map->map.bankwidth = 4;
188 map->map.read = mtd_pci_read32;
189 map->map.write = mtd_pci_write32;
190 map->map.size = len;
191 map->base = ioremap(base, len);
192
193 if (!map->base)
194 return -ENOMEM;
195
196 return 0;
197}
198
199static void
200intel_dc21285_exit(struct pci_dev *dev, struct map_pci_info *map)
201{
202 if (map->base)
203 iounmap(map->base);
204
205 /*
206 * We need to undo the PCI BAR2/PCI ROM BAR address alteration.
207 */
208 pci_disable_rom(dev);
209}
210
211static unsigned long
212intel_dc21285_translate(struct map_pci_info *map, unsigned long ofs)
213{
214 return ofs & 0x00ffffc0 ? ofs : (ofs ^ (1 << 5));
215}
216
217static struct mtd_pci_info intel_dc21285_info = {
218 .init = intel_dc21285_init,
219 .exit = intel_dc21285_exit,
220 .translate = intel_dc21285_translate,
221 .map_name = "jedec_probe",
222};
223
224/*
225 * PCI device ID table
226 */
227
228static const struct pci_device_id mtd_pci_ids[] = {
229 {
230 .vendor = PCI_VENDOR_ID_INTEL,
231 .device = 0x530d,
232 .subvendor = PCI_ANY_ID,
233 .subdevice = PCI_ANY_ID,
234 .class = PCI_CLASS_MEMORY_OTHER << 8,
235 .class_mask = 0xffff00,
236 .driver_data = (unsigned long)&intel_iq80310_info,
237 },
238 {
239 .vendor = PCI_VENDOR_ID_DEC,
240 .device = PCI_DEVICE_ID_DEC_21285,
241 .subvendor = 0, /* DC21285 defaults to 0 on reset */
242 .subdevice = 0, /* DC21285 defaults to 0 on reset */
243 .driver_data = (unsigned long)&intel_dc21285_info,
244 },
245 { 0, }
246};
247
248/*
249 * Generic code follows.
250 */
251
252static int mtd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
253{
254 struct mtd_pci_info *info = (struct mtd_pci_info *)id->driver_data;
255 struct map_pci_info *map = NULL;
256 struct mtd_info *mtd = NULL;
257 int err;
258
259 err = pci_enable_device(dev);
260 if (err)
261 goto out;
262
263 err = pci_request_regions(dev, "pci mtd");
264 if (err)
265 goto out;
266
267 map = kmalloc(sizeof(*map), GFP_KERNEL);
268 err = -ENOMEM;
269 if (!map)
270 goto release;
271
272 map->map = mtd_pci_map;
273 map->map.name = pci_name(dev);
274 map->dev = dev;
275 map->exit = info->exit;
276 map->translate = info->translate;
277
278 err = info->init(dev, map);
279 if (err)
280 goto release;
281
282 mtd = do_map_probe(info->map_name, &map->map);
283 err = -ENODEV;
284 if (!mtd)
285 goto release;
286
287 mtd->owner = THIS_MODULE;
288 mtd_device_register(mtd, NULL, 0);
289
290 pci_set_drvdata(dev, mtd);
291
292 return 0;
293
294release:
295 if (map) {
296 map->exit(dev, map);
297 kfree(map);
298 }
299
300 pci_release_regions(dev);
301out:
302 return err;
303}
304
305static void mtd_pci_remove(struct pci_dev *dev)
306{
307 struct mtd_info *mtd = pci_get_drvdata(dev);
308 struct map_pci_info *map = mtd->priv;
309
310 mtd_device_unregister(mtd);
311 map_destroy(mtd);
312 map->exit(dev, map);
313 kfree(map);
314
315 pci_release_regions(dev);
316}
317
318static struct pci_driver mtd_pci_driver = {
319 .name = "MTD PCI",
320 .probe = mtd_pci_probe,
321 .remove = mtd_pci_remove,
322 .id_table = mtd_pci_ids,
323};
324
325module_pci_driver(mtd_pci_driver);
326
327MODULE_LICENSE("GPL");
328MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
329MODULE_DESCRIPTION("Generic PCI map driver");
330MODULE_DEVICE_TABLE(pci, mtd_pci_ids);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/drivers/mtd/maps/pci.c
4 *
5 * Copyright (C) 2001 Russell King, All rights reserved.
6 *
7 * Generic PCI memory map driver. We support the following boards:
8 * - Intel IQ80310 ATU.
9 * - Intel EBSA285 (blank rom programming mode). Tested working 27/09/2001
10 */
11#include <linux/module.h>
12#include <linux/kernel.h>
13#include <linux/pci.h>
14#include <linux/slab.h>
15
16#include <linux/mtd/mtd.h>
17#include <linux/mtd/map.h>
18#include <linux/mtd/partitions.h>
19
20struct map_pci_info;
21
22struct mtd_pci_info {
23 int (*init)(struct pci_dev *dev, struct map_pci_info *map);
24 void (*exit)(struct pci_dev *dev, struct map_pci_info *map);
25 unsigned long (*translate)(struct map_pci_info *map, unsigned long ofs);
26 const char *map_name;
27};
28
29struct map_pci_info {
30 struct map_info map;
31 void __iomem *base;
32 void (*exit)(struct pci_dev *dev, struct map_pci_info *map);
33 unsigned long (*translate)(struct map_pci_info *map, unsigned long ofs);
34 struct pci_dev *dev;
35};
36
37static map_word mtd_pci_read8(struct map_info *_map, unsigned long ofs)
38{
39 struct map_pci_info *map = (struct map_pci_info *)_map;
40 map_word val;
41 val.x[0]= readb(map->base + map->translate(map, ofs));
42 return val;
43}
44
45static map_word mtd_pci_read32(struct map_info *_map, unsigned long ofs)
46{
47 struct map_pci_info *map = (struct map_pci_info *)_map;
48 map_word val;
49 val.x[0] = readl(map->base + map->translate(map, ofs));
50 return val;
51}
52
53static void mtd_pci_copyfrom(struct map_info *_map, void *to, unsigned long from, ssize_t len)
54{
55 struct map_pci_info *map = (struct map_pci_info *)_map;
56 memcpy_fromio(to, map->base + map->translate(map, from), len);
57}
58
59static void mtd_pci_write8(struct map_info *_map, map_word val, unsigned long ofs)
60{
61 struct map_pci_info *map = (struct map_pci_info *)_map;
62 writeb(val.x[0], map->base + map->translate(map, ofs));
63}
64
65static void mtd_pci_write32(struct map_info *_map, map_word val, unsigned long ofs)
66{
67 struct map_pci_info *map = (struct map_pci_info *)_map;
68 writel(val.x[0], map->base + map->translate(map, ofs));
69}
70
71static void mtd_pci_copyto(struct map_info *_map, unsigned long to, const void *from, ssize_t len)
72{
73 struct map_pci_info *map = (struct map_pci_info *)_map;
74 memcpy_toio(map->base + map->translate(map, to), from, len);
75}
76
77static const struct map_info mtd_pci_map = {
78 .phys = NO_XIP,
79 .copy_from = mtd_pci_copyfrom,
80 .copy_to = mtd_pci_copyto,
81};
82
83/*
84 * Intel IOP80310 Flash driver
85 */
86
87static int
88intel_iq80310_init(struct pci_dev *dev, struct map_pci_info *map)
89{
90 u32 win_base;
91
92 map->map.bankwidth = 1;
93 map->map.read = mtd_pci_read8;
94 map->map.write = mtd_pci_write8;
95
96 map->map.size = 0x00800000;
97 map->base = ioremap(pci_resource_start(dev, 0),
98 pci_resource_len(dev, 0));
99
100 if (!map->base)
101 return -ENOMEM;
102
103 /*
104 * We want to base the memory window at Xscale
105 * bus address 0, not 0x1000.
106 */
107 pci_read_config_dword(dev, 0x44, &win_base);
108 pci_write_config_dword(dev, 0x44, 0);
109
110 map->map.map_priv_2 = win_base;
111
112 return 0;
113}
114
115static void
116intel_iq80310_exit(struct pci_dev *dev, struct map_pci_info *map)
117{
118 if (map->base)
119 iounmap(map->base);
120 pci_write_config_dword(dev, 0x44, map->map.map_priv_2);
121}
122
123static unsigned long
124intel_iq80310_translate(struct map_pci_info *map, unsigned long ofs)
125{
126 unsigned long page_addr = ofs & 0x00400000;
127
128 /*
129 * This mundges the flash location so we avoid
130 * the first 80 bytes (they appear to read nonsense).
131 */
132 if (page_addr) {
133 writel(0x00000008, map->base + 0x1558);
134 writel(0x00000000, map->base + 0x1550);
135 } else {
136 writel(0x00000007, map->base + 0x1558);
137 writel(0x00800000, map->base + 0x1550);
138 ofs += 0x00800000;
139 }
140
141 return ofs;
142}
143
144static struct mtd_pci_info intel_iq80310_info = {
145 .init = intel_iq80310_init,
146 .exit = intel_iq80310_exit,
147 .translate = intel_iq80310_translate,
148 .map_name = "cfi_probe",
149};
150
151/*
152 * Intel DC21285 driver
153 */
154
155static int
156intel_dc21285_init(struct pci_dev *dev, struct map_pci_info *map)
157{
158 unsigned long base, len;
159
160 base = pci_resource_start(dev, PCI_ROM_RESOURCE);
161 len = pci_resource_len(dev, PCI_ROM_RESOURCE);
162
163 if (!len || !base) {
164 /*
165 * No ROM resource
166 */
167 base = pci_resource_start(dev, 2);
168 len = pci_resource_len(dev, 2);
169
170 /*
171 * We need to re-allocate PCI BAR2 address range to the
172 * PCI ROM BAR, and disable PCI BAR2.
173 */
174 } else {
175 /*
176 * Hmm, if an address was allocated to the ROM resource, but
177 * not enabled, should we be allocating a new resource for it
178 * or simply enabling it?
179 */
180 pci_enable_rom(dev);
181 printk("%s: enabling expansion ROM\n", pci_name(dev));
182 }
183
184 if (!len || !base)
185 return -ENXIO;
186
187 map->map.bankwidth = 4;
188 map->map.read = mtd_pci_read32;
189 map->map.write = mtd_pci_write32;
190 map->map.size = len;
191 map->base = ioremap(base, len);
192
193 if (!map->base)
194 return -ENOMEM;
195
196 return 0;
197}
198
199static void
200intel_dc21285_exit(struct pci_dev *dev, struct map_pci_info *map)
201{
202 if (map->base)
203 iounmap(map->base);
204
205 /*
206 * We need to undo the PCI BAR2/PCI ROM BAR address alteration.
207 */
208 pci_disable_rom(dev);
209}
210
211static unsigned long
212intel_dc21285_translate(struct map_pci_info *map, unsigned long ofs)
213{
214 return ofs & 0x00ffffc0 ? ofs : (ofs ^ (1 << 5));
215}
216
217static struct mtd_pci_info intel_dc21285_info = {
218 .init = intel_dc21285_init,
219 .exit = intel_dc21285_exit,
220 .translate = intel_dc21285_translate,
221 .map_name = "jedec_probe",
222};
223
224/*
225 * PCI device ID table
226 */
227
228static const struct pci_device_id mtd_pci_ids[] = {
229 {
230 .vendor = PCI_VENDOR_ID_INTEL,
231 .device = 0x530d,
232 .subvendor = PCI_ANY_ID,
233 .subdevice = PCI_ANY_ID,
234 .class = PCI_CLASS_MEMORY_OTHER << 8,
235 .class_mask = 0xffff00,
236 .driver_data = (unsigned long)&intel_iq80310_info,
237 },
238 {
239 .vendor = PCI_VENDOR_ID_DEC,
240 .device = PCI_DEVICE_ID_DEC_21285,
241 .subvendor = 0, /* DC21285 defaults to 0 on reset */
242 .subdevice = 0, /* DC21285 defaults to 0 on reset */
243 .driver_data = (unsigned long)&intel_dc21285_info,
244 },
245 { 0, }
246};
247
248/*
249 * Generic code follows.
250 */
251
252static int mtd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
253{
254 struct mtd_pci_info *info = (struct mtd_pci_info *)id->driver_data;
255 struct map_pci_info *map = NULL;
256 struct mtd_info *mtd = NULL;
257 int err;
258
259 err = pci_enable_device(dev);
260 if (err)
261 goto out;
262
263 err = pci_request_regions(dev, "pci mtd");
264 if (err)
265 goto out;
266
267 map = kmalloc(sizeof(*map), GFP_KERNEL);
268 err = -ENOMEM;
269 if (!map)
270 goto release;
271
272 map->map = mtd_pci_map;
273 map->map.name = pci_name(dev);
274 map->dev = dev;
275 map->exit = info->exit;
276 map->translate = info->translate;
277
278 err = info->init(dev, map);
279 if (err)
280 goto release;
281
282 mtd = do_map_probe(info->map_name, &map->map);
283 err = -ENODEV;
284 if (!mtd)
285 goto release;
286
287 mtd->owner = THIS_MODULE;
288 mtd_device_register(mtd, NULL, 0);
289
290 pci_set_drvdata(dev, mtd);
291
292 return 0;
293
294release:
295 if (map) {
296 map->exit(dev, map);
297 kfree(map);
298 }
299
300 pci_release_regions(dev);
301out:
302 return err;
303}
304
305static void mtd_pci_remove(struct pci_dev *dev)
306{
307 struct mtd_info *mtd = pci_get_drvdata(dev);
308 struct map_pci_info *map = mtd->priv;
309
310 mtd_device_unregister(mtd);
311 map_destroy(mtd);
312 map->exit(dev, map);
313 kfree(map);
314
315 pci_release_regions(dev);
316}
317
318static struct pci_driver mtd_pci_driver = {
319 .name = "MTD PCI",
320 .probe = mtd_pci_probe,
321 .remove = mtd_pci_remove,
322 .id_table = mtd_pci_ids,
323};
324
325module_pci_driver(mtd_pci_driver);
326
327MODULE_LICENSE("GPL");
328MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
329MODULE_DESCRIPTION("Generic PCI map driver");
330MODULE_DEVICE_TABLE(pci, mtd_pci_ids);