This source file includes following definitions.
- cb710_pci_update_config_reg
- cb710_pci_configure
- cb710_irq_handler
- cb710_release_slot
- cb710_register_slot
- cb710_unregister_slot
- cb710_set_irq_handler
- cb710_suspend
- cb710_resume
- cb710_probe
- cb710_remove_one
- cb710_init_module
- cb710_cleanup_module
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6
7 #include <linux/kernel.h>
8 #include <linux/module.h>
9 #include <linux/pci.h>
10 #include <linux/spinlock.h>
11 #include <linux/idr.h>
12 #include <linux/cb710.h>
13 #include <linux/gfp.h>
14
15 static DEFINE_IDA(cb710_ida);
16
17 void cb710_pci_update_config_reg(struct pci_dev *pdev,
18 int reg, uint32_t mask, uint32_t xor)
19 {
20 u32 rval;
21
22 pci_read_config_dword(pdev, reg, &rval);
23 rval = (rval & mask) ^ xor;
24 pci_write_config_dword(pdev, reg, rval);
25 }
26 EXPORT_SYMBOL_GPL(cb710_pci_update_config_reg);
27
28
29 static int cb710_pci_configure(struct pci_dev *pdev)
30 {
31 unsigned int devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
32 struct pci_dev *pdev0;
33 u32 val;
34
35 cb710_pci_update_config_reg(pdev, 0x48,
36 ~0x000000FF, 0x0000003F);
37
38 pci_read_config_dword(pdev, 0x48, &val);
39 if (val & 0x80000000)
40 return 0;
41
42 pdev0 = pci_get_slot(pdev->bus, devfn);
43 if (!pdev0)
44 return -ENODEV;
45
46 if (pdev0->vendor == PCI_VENDOR_ID_ENE
47 && pdev0->device == PCI_DEVICE_ID_ENE_720) {
48 cb710_pci_update_config_reg(pdev0, 0x8C,
49 ~0x00F00000, 0x00100000);
50 cb710_pci_update_config_reg(pdev0, 0xB0,
51 ~0x08000000, 0x08000000);
52 }
53
54 cb710_pci_update_config_reg(pdev0, 0x8C,
55 ~0x00000F00, 0x00000200);
56 cb710_pci_update_config_reg(pdev0, 0x90,
57 ~0x00060000, 0x00040000);
58
59 pci_dev_put(pdev0);
60
61 return 0;
62 }
63
64 static irqreturn_t cb710_irq_handler(int irq, void *data)
65 {
66 struct cb710_chip *chip = data;
67 struct cb710_slot *slot = &chip->slot[0];
68 irqreturn_t handled = IRQ_NONE;
69 unsigned nr;
70
71 spin_lock(&chip->irq_lock);
72
73 for (nr = chip->slots; nr; ++slot, --nr) {
74 cb710_irq_handler_t handler_func = slot->irq_handler;
75 if (handler_func && handler_func(slot))
76 handled = IRQ_HANDLED;
77 }
78
79 spin_unlock(&chip->irq_lock);
80
81 return handled;
82 }
83
84 static void cb710_release_slot(struct device *dev)
85 {
86 #ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS
87 struct cb710_slot *slot = cb710_pdev_to_slot(to_platform_device(dev));
88 struct cb710_chip *chip = cb710_slot_to_chip(slot);
89
90
91 atomic_dec(&chip->slot_refs_count);
92 #endif
93 }
94
95 static int cb710_register_slot(struct cb710_chip *chip,
96 unsigned slot_mask, unsigned io_offset, const char *name)
97 {
98 int nr = chip->slots;
99 struct cb710_slot *slot = &chip->slot[nr];
100 int err;
101
102 dev_dbg(cb710_chip_dev(chip),
103 "register: %s.%d; slot %d; mask %d; IO offset: 0x%02X\n",
104 name, chip->platform_id, nr, slot_mask, io_offset);
105
106
107
108 ++chip->slots;
109 smp_wmb();
110
111 slot->iobase = chip->iobase + io_offset;
112 slot->pdev.name = name;
113 slot->pdev.id = chip->platform_id;
114 slot->pdev.dev.parent = &chip->pdev->dev;
115 slot->pdev.dev.release = cb710_release_slot;
116
117 err = platform_device_register(&slot->pdev);
118
119 #ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS
120 atomic_inc(&chip->slot_refs_count);
121 #endif
122
123 if (err) {
124
125
126 platform_device_put(&slot->pdev);
127
128
129 --chip->slots;
130 return err;
131 }
132
133 chip->slot_mask |= slot_mask;
134
135 return 0;
136 }
137
138 static void cb710_unregister_slot(struct cb710_chip *chip,
139 unsigned slot_mask)
140 {
141 int nr = chip->slots - 1;
142
143 if (!(chip->slot_mask & slot_mask))
144 return;
145
146 platform_device_unregister(&chip->slot[nr].pdev);
147
148
149 smp_rmb();
150 BUG_ON(chip->slot[nr].irq_handler != NULL);
151
152
153 --chip->slots;
154 chip->slot_mask &= ~slot_mask;
155 }
156
157 void cb710_set_irq_handler(struct cb710_slot *slot,
158 cb710_irq_handler_t handler)
159 {
160 struct cb710_chip *chip = cb710_slot_to_chip(slot);
161 unsigned long flags;
162
163 spin_lock_irqsave(&chip->irq_lock, flags);
164 slot->irq_handler = handler;
165 spin_unlock_irqrestore(&chip->irq_lock, flags);
166 }
167 EXPORT_SYMBOL_GPL(cb710_set_irq_handler);
168
169 #ifdef CONFIG_PM
170
171 static int cb710_suspend(struct pci_dev *pdev, pm_message_t state)
172 {
173 struct cb710_chip *chip = pci_get_drvdata(pdev);
174
175 devm_free_irq(&pdev->dev, pdev->irq, chip);
176 pci_save_state(pdev);
177 pci_disable_device(pdev);
178 if (state.event & PM_EVENT_SLEEP)
179 pci_set_power_state(pdev, PCI_D3hot);
180 return 0;
181 }
182
183 static int cb710_resume(struct pci_dev *pdev)
184 {
185 struct cb710_chip *chip = pci_get_drvdata(pdev);
186 int err;
187
188 pci_set_power_state(pdev, PCI_D0);
189 pci_restore_state(pdev);
190 err = pcim_enable_device(pdev);
191 if (err)
192 return err;
193
194 return devm_request_irq(&pdev->dev, pdev->irq,
195 cb710_irq_handler, IRQF_SHARED, KBUILD_MODNAME, chip);
196 }
197
198 #endif
199
200 static int cb710_probe(struct pci_dev *pdev,
201 const struct pci_device_id *ent)
202 {
203 struct cb710_chip *chip;
204 u32 val;
205 int err;
206 int n = 0;
207
208 err = cb710_pci_configure(pdev);
209 if (err)
210 return err;
211
212
213 pci_read_config_dword(pdev, 0x48, &val);
214 if (!(val & 0x80000000)) {
215 pci_write_config_dword(pdev, 0x48, val|0x71000000);
216 pci_read_config_dword(pdev, 0x48, &val);
217 }
218
219 dev_dbg(&pdev->dev, "PCI config[0x48] = 0x%08X\n", val);
220 if (!(val & 0x70000000))
221 return -ENODEV;
222 val = (val >> 28) & 7;
223 if (val & CB710_SLOT_MMC)
224 ++n;
225 if (val & CB710_SLOT_MS)
226 ++n;
227 if (val & CB710_SLOT_SM)
228 ++n;
229
230 chip = devm_kzalloc(&pdev->dev, struct_size(chip, slot, n),
231 GFP_KERNEL);
232 if (!chip)
233 return -ENOMEM;
234
235 err = pcim_enable_device(pdev);
236 if (err)
237 return err;
238
239 err = pcim_iomap_regions(pdev, 0x0001, KBUILD_MODNAME);
240 if (err)
241 return err;
242
243 spin_lock_init(&chip->irq_lock);
244 chip->pdev = pdev;
245 chip->iobase = pcim_iomap_table(pdev)[0];
246
247 pci_set_drvdata(pdev, chip);
248
249 err = devm_request_irq(&pdev->dev, pdev->irq,
250 cb710_irq_handler, IRQF_SHARED, KBUILD_MODNAME, chip);
251 if (err)
252 return err;
253
254 err = ida_alloc(&cb710_ida, GFP_KERNEL);
255 if (err < 0)
256 return err;
257 chip->platform_id = err;
258
259 dev_info(&pdev->dev, "id %d, IO 0x%p, IRQ %d\n",
260 chip->platform_id, chip->iobase, pdev->irq);
261
262 if (val & CB710_SLOT_MMC) {
263 err = cb710_register_slot(chip,
264 CB710_SLOT_MMC, 0x00, "cb710-mmc");
265 if (err)
266 return err;
267 }
268
269 if (val & CB710_SLOT_MS) {
270 err = cb710_register_slot(chip,
271 CB710_SLOT_MS, 0x40, "cb710-ms");
272 if (err)
273 goto unreg_mmc;
274 }
275
276 if (val & CB710_SLOT_SM) {
277 err = cb710_register_slot(chip,
278 CB710_SLOT_SM, 0x60, "cb710-sm");
279 if (err)
280 goto unreg_ms;
281 }
282
283 return 0;
284 unreg_ms:
285 cb710_unregister_slot(chip, CB710_SLOT_MS);
286 unreg_mmc:
287 cb710_unregister_slot(chip, CB710_SLOT_MMC);
288
289 #ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS
290 BUG_ON(atomic_read(&chip->slot_refs_count) != 0);
291 #endif
292 return err;
293 }
294
295 static void cb710_remove_one(struct pci_dev *pdev)
296 {
297 struct cb710_chip *chip = pci_get_drvdata(pdev);
298
299 cb710_unregister_slot(chip, CB710_SLOT_SM);
300 cb710_unregister_slot(chip, CB710_SLOT_MS);
301 cb710_unregister_slot(chip, CB710_SLOT_MMC);
302 #ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS
303 BUG_ON(atomic_read(&chip->slot_refs_count) != 0);
304 #endif
305
306 ida_free(&cb710_ida, chip->platform_id);
307 }
308
309 static const struct pci_device_id cb710_pci_tbl[] = {
310 { PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_CB710_FLASH,
311 PCI_ANY_ID, PCI_ANY_ID, },
312 { 0, }
313 };
314
315 static struct pci_driver cb710_driver = {
316 .name = KBUILD_MODNAME,
317 .id_table = cb710_pci_tbl,
318 .probe = cb710_probe,
319 .remove = cb710_remove_one,
320 #ifdef CONFIG_PM
321 .suspend = cb710_suspend,
322 .resume = cb710_resume,
323 #endif
324 };
325
326 static int __init cb710_init_module(void)
327 {
328 return pci_register_driver(&cb710_driver);
329 }
330
331 static void __exit cb710_cleanup_module(void)
332 {
333 pci_unregister_driver(&cb710_driver);
334 ida_destroy(&cb710_ida);
335 }
336
337 module_init(cb710_init_module);
338 module_exit(cb710_cleanup_module);
339
340 MODULE_AUTHOR("Michał Mirosław <mirq-linux@rere.qmqm.pl>");
341 MODULE_DESCRIPTION("ENE CB710 memory card reader driver");
342 MODULE_LICENSE("GPL");
343 MODULE_DEVICE_TABLE(pci, cb710_pci_tbl);