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55e331cf FF |
1 | /* |
2 | * Copyright (C) 2006, 2007 Eugene Konev <ejka@openwrt.org> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | * | |
18 | * Parts of the VLYNQ specification can be found here: | |
19 | * http://www.ti.com/litv/pdf/sprue36a | |
20 | */ | |
21 | ||
22 | #include <linux/init.h> | |
23 | #include <linux/types.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/string.h> | |
26 | #include <linux/device.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/errno.h> | |
29 | #include <linux/platform_device.h> | |
30 | #include <linux/interrupt.h> | |
55e331cf FF |
31 | #include <linux/delay.h> |
32 | #include <linux/io.h> | |
5a0e3ad6 | 33 | #include <linux/slab.h> |
55e331cf FF |
34 | |
35 | #include <linux/vlynq.h> | |
36 | ||
37 | #define VLYNQ_CTRL_PM_ENABLE 0x80000000 | |
38 | #define VLYNQ_CTRL_CLOCK_INT 0x00008000 | |
39 | #define VLYNQ_CTRL_CLOCK_DIV(x) (((x) & 7) << 16) | |
40 | #define VLYNQ_CTRL_INT_LOCAL 0x00004000 | |
41 | #define VLYNQ_CTRL_INT_ENABLE 0x00002000 | |
42 | #define VLYNQ_CTRL_INT_VECTOR(x) (((x) & 0x1f) << 8) | |
43 | #define VLYNQ_CTRL_INT2CFG 0x00000080 | |
44 | #define VLYNQ_CTRL_RESET 0x00000001 | |
45 | ||
46 | #define VLYNQ_CTRL_CLOCK_MASK (0x7 << 16) | |
47 | ||
48 | #define VLYNQ_INT_OFFSET 0x00000014 | |
49 | #define VLYNQ_REMOTE_OFFSET 0x00000080 | |
50 | ||
51 | #define VLYNQ_STATUS_LINK 0x00000001 | |
52 | #define VLYNQ_STATUS_LERROR 0x00000080 | |
53 | #define VLYNQ_STATUS_RERROR 0x00000100 | |
54 | ||
55 | #define VINT_ENABLE 0x00000100 | |
56 | #define VINT_TYPE_EDGE 0x00000080 | |
57 | #define VINT_LEVEL_LOW 0x00000040 | |
58 | #define VINT_VECTOR(x) ((x) & 0x1f) | |
59 | #define VINT_OFFSET(irq) (8 * ((irq) % 4)) | |
60 | ||
61 | #define VLYNQ_AUTONEGO_V2 0x00010000 | |
62 | ||
63 | struct vlynq_regs { | |
64 | u32 revision; | |
65 | u32 control; | |
66 | u32 status; | |
67 | u32 int_prio; | |
68 | u32 int_status; | |
69 | u32 int_pending; | |
70 | u32 int_ptr; | |
71 | u32 tx_offset; | |
72 | struct vlynq_mapping rx_mapping[4]; | |
73 | u32 chip; | |
74 | u32 autonego; | |
75 | u32 unused[6]; | |
76 | u32 int_device[8]; | |
77 | }; | |
78 | ||
9e2db5c9 | 79 | #ifdef CONFIG_VLYNQ_DEBUG |
55e331cf FF |
80 | static void vlynq_dump_regs(struct vlynq_device *dev) |
81 | { | |
82 | int i; | |
83 | ||
84 | printk(KERN_DEBUG "VLYNQ local=%p remote=%p\n", | |
85 | dev->local, dev->remote); | |
86 | for (i = 0; i < 32; i++) { | |
87 | printk(KERN_DEBUG "VLYNQ: local %d: %08x\n", | |
88 | i + 1, ((u32 *)dev->local)[i]); | |
89 | printk(KERN_DEBUG "VLYNQ: remote %d: %08x\n", | |
90 | i + 1, ((u32 *)dev->remote)[i]); | |
91 | } | |
92 | } | |
93 | ||
94 | static void vlynq_dump_mem(u32 *base, int count) | |
95 | { | |
96 | int i; | |
97 | ||
98 | for (i = 0; i < (count + 3) / 4; i++) { | |
99 | if (i % 4 == 0) | |
100 | printk(KERN_DEBUG "\nMEM[0x%04x]:", i * 4); | |
101 | printk(KERN_DEBUG " 0x%08x", *(base + i)); | |
102 | } | |
103 | printk(KERN_DEBUG "\n"); | |
104 | } | |
105 | #endif | |
106 | ||
107 | /* Check the VLYNQ link status with a given device */ | |
108 | static int vlynq_linked(struct vlynq_device *dev) | |
109 | { | |
110 | int i; | |
111 | ||
112 | for (i = 0; i < 100; i++) | |
113 | if (readl(&dev->local->status) & VLYNQ_STATUS_LINK) | |
114 | return 1; | |
115 | else | |
116 | cpu_relax(); | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | static void vlynq_reset(struct vlynq_device *dev) | |
122 | { | |
123 | writel(readl(&dev->local->control) | VLYNQ_CTRL_RESET, | |
124 | &dev->local->control); | |
125 | ||
126 | /* Wait for the devices to finish resetting */ | |
127 | msleep(5); | |
128 | ||
129 | /* Remove reset bit */ | |
130 | writel(readl(&dev->local->control) & ~VLYNQ_CTRL_RESET, | |
131 | &dev->local->control); | |
132 | ||
133 | /* Give some time for the devices to settle */ | |
134 | msleep(5); | |
135 | } | |
136 | ||
137 | static void vlynq_irq_unmask(unsigned int irq) | |
138 | { | |
139 | u32 val; | |
140 | struct vlynq_device *dev = get_irq_chip_data(irq); | |
141 | int virq; | |
142 | ||
143 | BUG_ON(!dev); | |
144 | virq = irq - dev->irq_start; | |
145 | val = readl(&dev->remote->int_device[virq >> 2]); | |
146 | val |= (VINT_ENABLE | virq) << VINT_OFFSET(virq); | |
147 | writel(val, &dev->remote->int_device[virq >> 2]); | |
148 | } | |
149 | ||
150 | static void vlynq_irq_mask(unsigned int irq) | |
151 | { | |
152 | u32 val; | |
153 | struct vlynq_device *dev = get_irq_chip_data(irq); | |
154 | int virq; | |
155 | ||
156 | BUG_ON(!dev); | |
157 | virq = irq - dev->irq_start; | |
158 | val = readl(&dev->remote->int_device[virq >> 2]); | |
159 | val &= ~(VINT_ENABLE << VINT_OFFSET(virq)); | |
160 | writel(val, &dev->remote->int_device[virq >> 2]); | |
161 | } | |
162 | ||
163 | static int vlynq_irq_type(unsigned int irq, unsigned int flow_type) | |
164 | { | |
165 | u32 val; | |
166 | struct vlynq_device *dev = get_irq_chip_data(irq); | |
167 | int virq; | |
168 | ||
169 | BUG_ON(!dev); | |
170 | virq = irq - dev->irq_start; | |
171 | val = readl(&dev->remote->int_device[virq >> 2]); | |
172 | switch (flow_type & IRQ_TYPE_SENSE_MASK) { | |
173 | case IRQ_TYPE_EDGE_RISING: | |
174 | case IRQ_TYPE_EDGE_FALLING: | |
175 | case IRQ_TYPE_EDGE_BOTH: | |
176 | val |= VINT_TYPE_EDGE << VINT_OFFSET(virq); | |
177 | val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq)); | |
178 | break; | |
179 | case IRQ_TYPE_LEVEL_HIGH: | |
180 | val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq)); | |
181 | val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq)); | |
182 | break; | |
183 | case IRQ_TYPE_LEVEL_LOW: | |
184 | val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq)); | |
185 | val |= VINT_LEVEL_LOW << VINT_OFFSET(virq); | |
186 | break; | |
187 | default: | |
188 | return -EINVAL; | |
189 | } | |
190 | writel(val, &dev->remote->int_device[virq >> 2]); | |
191 | return 0; | |
192 | } | |
193 | ||
194 | static void vlynq_local_ack(unsigned int irq) | |
195 | { | |
196 | struct vlynq_device *dev = get_irq_chip_data(irq); | |
197 | ||
198 | u32 status = readl(&dev->local->status); | |
199 | ||
200 | pr_debug("%s: local status: 0x%08x\n", | |
201 | dev_name(&dev->dev), status); | |
202 | writel(status, &dev->local->status); | |
203 | } | |
204 | ||
205 | static void vlynq_remote_ack(unsigned int irq) | |
206 | { | |
207 | struct vlynq_device *dev = get_irq_chip_data(irq); | |
208 | ||
209 | u32 status = readl(&dev->remote->status); | |
210 | ||
211 | pr_debug("%s: remote status: 0x%08x\n", | |
212 | dev_name(&dev->dev), status); | |
213 | writel(status, &dev->remote->status); | |
214 | } | |
215 | ||
216 | static irqreturn_t vlynq_irq(int irq, void *dev_id) | |
217 | { | |
218 | struct vlynq_device *dev = dev_id; | |
219 | u32 status; | |
220 | int virq = 0; | |
221 | ||
222 | status = readl(&dev->local->int_status); | |
223 | writel(status, &dev->local->int_status); | |
224 | ||
225 | if (unlikely(!status)) | |
226 | spurious_interrupt(); | |
227 | ||
228 | while (status) { | |
229 | if (status & 1) | |
230 | do_IRQ(dev->irq_start + virq); | |
231 | status >>= 1; | |
232 | virq++; | |
233 | } | |
234 | ||
235 | return IRQ_HANDLED; | |
236 | } | |
237 | ||
238 | static struct irq_chip vlynq_irq_chip = { | |
239 | .name = "vlynq", | |
240 | .unmask = vlynq_irq_unmask, | |
241 | .mask = vlynq_irq_mask, | |
242 | .set_type = vlynq_irq_type, | |
243 | }; | |
244 | ||
245 | static struct irq_chip vlynq_local_chip = { | |
246 | .name = "vlynq local error", | |
247 | .unmask = vlynq_irq_unmask, | |
248 | .mask = vlynq_irq_mask, | |
249 | .ack = vlynq_local_ack, | |
250 | }; | |
251 | ||
252 | static struct irq_chip vlynq_remote_chip = { | |
253 | .name = "vlynq local error", | |
254 | .unmask = vlynq_irq_unmask, | |
255 | .mask = vlynq_irq_mask, | |
256 | .ack = vlynq_remote_ack, | |
257 | }; | |
258 | ||
259 | static int vlynq_setup_irq(struct vlynq_device *dev) | |
260 | { | |
261 | u32 val; | |
262 | int i, virq; | |
263 | ||
264 | if (dev->local_irq == dev->remote_irq) { | |
265 | printk(KERN_ERR | |
266 | "%s: local vlynq irq should be different from remote\n", | |
267 | dev_name(&dev->dev)); | |
268 | return -EINVAL; | |
269 | } | |
270 | ||
271 | /* Clear local and remote error bits */ | |
272 | writel(readl(&dev->local->status), &dev->local->status); | |
273 | writel(readl(&dev->remote->status), &dev->remote->status); | |
274 | ||
275 | /* Now setup interrupts */ | |
276 | val = VLYNQ_CTRL_INT_VECTOR(dev->local_irq); | |
277 | val |= VLYNQ_CTRL_INT_ENABLE | VLYNQ_CTRL_INT_LOCAL | | |
278 | VLYNQ_CTRL_INT2CFG; | |
279 | val |= readl(&dev->local->control); | |
280 | writel(VLYNQ_INT_OFFSET, &dev->local->int_ptr); | |
281 | writel(val, &dev->local->control); | |
282 | ||
283 | val = VLYNQ_CTRL_INT_VECTOR(dev->remote_irq); | |
284 | val |= VLYNQ_CTRL_INT_ENABLE; | |
285 | val |= readl(&dev->remote->control); | |
286 | writel(VLYNQ_INT_OFFSET, &dev->remote->int_ptr); | |
287 | writel(val, &dev->remote->int_ptr); | |
288 | writel(val, &dev->remote->control); | |
289 | ||
290 | for (i = dev->irq_start; i <= dev->irq_end; i++) { | |
291 | virq = i - dev->irq_start; | |
292 | if (virq == dev->local_irq) { | |
293 | set_irq_chip_and_handler(i, &vlynq_local_chip, | |
294 | handle_level_irq); | |
295 | set_irq_chip_data(i, dev); | |
296 | } else if (virq == dev->remote_irq) { | |
297 | set_irq_chip_and_handler(i, &vlynq_remote_chip, | |
298 | handle_level_irq); | |
299 | set_irq_chip_data(i, dev); | |
300 | } else { | |
301 | set_irq_chip_and_handler(i, &vlynq_irq_chip, | |
302 | handle_simple_irq); | |
303 | set_irq_chip_data(i, dev); | |
304 | writel(0, &dev->remote->int_device[virq >> 2]); | |
305 | } | |
306 | } | |
307 | ||
308 | if (request_irq(dev->irq, vlynq_irq, IRQF_SHARED, "vlynq", dev)) { | |
309 | printk(KERN_ERR "%s: request_irq failed\n", | |
310 | dev_name(&dev->dev)); | |
311 | return -EAGAIN; | |
312 | } | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | static void vlynq_device_release(struct device *dev) | |
318 | { | |
319 | struct vlynq_device *vdev = to_vlynq_device(dev); | |
320 | kfree(vdev); | |
321 | } | |
322 | ||
323 | static int vlynq_device_match(struct device *dev, | |
324 | struct device_driver *drv) | |
325 | { | |
326 | struct vlynq_device *vdev = to_vlynq_device(dev); | |
327 | struct vlynq_driver *vdrv = to_vlynq_driver(drv); | |
328 | struct vlynq_device_id *ids = vdrv->id_table; | |
329 | ||
330 | while (ids->id) { | |
331 | if (ids->id == vdev->dev_id) { | |
332 | vdev->divisor = ids->divisor; | |
333 | vlynq_set_drvdata(vdev, ids); | |
334 | printk(KERN_INFO "Driver found for VLYNQ " | |
335 | "device: %08x\n", vdev->dev_id); | |
336 | return 1; | |
337 | } | |
338 | printk(KERN_DEBUG "Not using the %08x VLYNQ device's driver" | |
339 | " for VLYNQ device: %08x\n", ids->id, vdev->dev_id); | |
340 | ids++; | |
341 | } | |
342 | return 0; | |
343 | } | |
344 | ||
345 | static int vlynq_device_probe(struct device *dev) | |
346 | { | |
347 | struct vlynq_device *vdev = to_vlynq_device(dev); | |
348 | struct vlynq_driver *drv = to_vlynq_driver(dev->driver); | |
349 | struct vlynq_device_id *id = vlynq_get_drvdata(vdev); | |
350 | int result = -ENODEV; | |
351 | ||
352 | if (drv->probe) | |
353 | result = drv->probe(vdev, id); | |
354 | if (result) | |
355 | put_device(dev); | |
356 | return result; | |
357 | } | |
358 | ||
359 | static int vlynq_device_remove(struct device *dev) | |
360 | { | |
361 | struct vlynq_driver *drv = to_vlynq_driver(dev->driver); | |
362 | ||
363 | if (drv->remove) | |
364 | drv->remove(to_vlynq_device(dev)); | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
369 | int __vlynq_register_driver(struct vlynq_driver *driver, struct module *owner) | |
370 | { | |
371 | driver->driver.name = driver->name; | |
372 | driver->driver.bus = &vlynq_bus_type; | |
373 | return driver_register(&driver->driver); | |
374 | } | |
375 | EXPORT_SYMBOL(__vlynq_register_driver); | |
376 | ||
377 | void vlynq_unregister_driver(struct vlynq_driver *driver) | |
378 | { | |
379 | driver_unregister(&driver->driver); | |
380 | } | |
381 | EXPORT_SYMBOL(vlynq_unregister_driver); | |
382 | ||
383 | /* | |
384 | * A VLYNQ remote device can clock the VLYNQ bus master | |
385 | * using a dedicated clock line. In that case, both the | |
386 | * remove device and the bus master should have the same | |
387 | * serial clock dividers configured. Iterate through the | |
388 | * 8 possible dividers until we actually link with the | |
389 | * device. | |
390 | */ | |
391 | static int __vlynq_try_remote(struct vlynq_device *dev) | |
392 | { | |
393 | int i; | |
394 | ||
395 | vlynq_reset(dev); | |
396 | for (i = dev->dev_id ? vlynq_rdiv2 : vlynq_rdiv8; dev->dev_id ? | |
397 | i <= vlynq_rdiv8 : i >= vlynq_rdiv2; | |
398 | dev->dev_id ? i++ : i--) { | |
399 | ||
400 | if (!vlynq_linked(dev)) | |
401 | break; | |
402 | ||
403 | writel((readl(&dev->remote->control) & | |
404 | ~VLYNQ_CTRL_CLOCK_MASK) | | |
405 | VLYNQ_CTRL_CLOCK_INT | | |
406 | VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1), | |
407 | &dev->remote->control); | |
408 | writel((readl(&dev->local->control) | |
409 | & ~(VLYNQ_CTRL_CLOCK_INT | | |
410 | VLYNQ_CTRL_CLOCK_MASK)) | | |
411 | VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1), | |
412 | &dev->local->control); | |
413 | ||
414 | if (vlynq_linked(dev)) { | |
415 | printk(KERN_DEBUG | |
416 | "%s: using remote clock divisor %d\n", | |
417 | dev_name(&dev->dev), i - vlynq_rdiv1 + 1); | |
418 | dev->divisor = i; | |
419 | return 0; | |
420 | } else { | |
421 | vlynq_reset(dev); | |
422 | } | |
423 | } | |
424 | ||
425 | return -ENODEV; | |
426 | } | |
427 | ||
428 | /* | |
429 | * A VLYNQ remote device can be clocked by the VLYNQ bus | |
430 | * master using a dedicated clock line. In that case, only | |
431 | * the bus master configures the serial clock divider. | |
432 | * Iterate through the 8 possible dividers until we | |
433 | * actually get a link with the device. | |
434 | */ | |
435 | static int __vlynq_try_local(struct vlynq_device *dev) | |
436 | { | |
437 | int i; | |
438 | ||
439 | vlynq_reset(dev); | |
440 | ||
441 | for (i = dev->dev_id ? vlynq_ldiv2 : vlynq_ldiv8; dev->dev_id ? | |
442 | i <= vlynq_ldiv8 : i >= vlynq_ldiv2; | |
443 | dev->dev_id ? i++ : i--) { | |
444 | ||
445 | writel((readl(&dev->local->control) & | |
446 | ~VLYNQ_CTRL_CLOCK_MASK) | | |
447 | VLYNQ_CTRL_CLOCK_INT | | |
448 | VLYNQ_CTRL_CLOCK_DIV(i - vlynq_ldiv1), | |
449 | &dev->local->control); | |
450 | ||
451 | if (vlynq_linked(dev)) { | |
452 | printk(KERN_DEBUG | |
453 | "%s: using local clock divisor %d\n", | |
454 | dev_name(&dev->dev), i - vlynq_ldiv1 + 1); | |
455 | dev->divisor = i; | |
456 | return 0; | |
457 | } else { | |
458 | vlynq_reset(dev); | |
459 | } | |
460 | } | |
461 | ||
462 | return -ENODEV; | |
463 | } | |
464 | ||
465 | /* | |
466 | * When using external clocking method, serial clock | |
467 | * is supplied by an external oscillator, therefore we | |
468 | * should mask the local clock bit in the clock control | |
469 | * register for both the bus master and the remote device. | |
470 | */ | |
471 | static int __vlynq_try_external(struct vlynq_device *dev) | |
472 | { | |
473 | vlynq_reset(dev); | |
474 | if (!vlynq_linked(dev)) | |
475 | return -ENODEV; | |
476 | ||
477 | writel((readl(&dev->remote->control) & | |
478 | ~VLYNQ_CTRL_CLOCK_INT), | |
479 | &dev->remote->control); | |
480 | ||
481 | writel((readl(&dev->local->control) & | |
482 | ~VLYNQ_CTRL_CLOCK_INT), | |
483 | &dev->local->control); | |
484 | ||
485 | if (vlynq_linked(dev)) { | |
486 | printk(KERN_DEBUG "%s: using external clock\n", | |
487 | dev_name(&dev->dev)); | |
488 | dev->divisor = vlynq_div_external; | |
489 | return 0; | |
490 | } | |
491 | ||
492 | return -ENODEV; | |
493 | } | |
494 | ||
495 | static int __vlynq_enable_device(struct vlynq_device *dev) | |
496 | { | |
497 | int result; | |
498 | struct plat_vlynq_ops *ops = dev->dev.platform_data; | |
499 | ||
500 | result = ops->on(dev); | |
501 | if (result) | |
502 | return result; | |
503 | ||
504 | switch (dev->divisor) { | |
505 | case vlynq_div_external: | |
506 | case vlynq_div_auto: | |
507 | /* When the device is brought from reset it should have clock | |
508 | * generation negotiated by hardware. | |
509 | * Check which device is generating clocks and perform setup | |
510 | * accordingly */ | |
511 | if (vlynq_linked(dev) && readl(&dev->remote->control) & | |
512 | VLYNQ_CTRL_CLOCK_INT) { | |
513 | if (!__vlynq_try_remote(dev) || | |
514 | !__vlynq_try_local(dev) || | |
515 | !__vlynq_try_external(dev)) | |
516 | return 0; | |
517 | } else { | |
518 | if (!__vlynq_try_external(dev) || | |
519 | !__vlynq_try_local(dev) || | |
520 | !__vlynq_try_remote(dev)) | |
521 | return 0; | |
522 | } | |
523 | break; | |
524 | case vlynq_ldiv1: | |
525 | case vlynq_ldiv2: | |
526 | case vlynq_ldiv3: | |
527 | case vlynq_ldiv4: | |
528 | case vlynq_ldiv5: | |
529 | case vlynq_ldiv6: | |
530 | case vlynq_ldiv7: | |
531 | case vlynq_ldiv8: | |
532 | writel(VLYNQ_CTRL_CLOCK_INT | | |
533 | VLYNQ_CTRL_CLOCK_DIV(dev->divisor - | |
534 | vlynq_ldiv1), &dev->local->control); | |
535 | writel(0, &dev->remote->control); | |
536 | if (vlynq_linked(dev)) { | |
537 | printk(KERN_DEBUG | |
538 | "%s: using local clock divisor %d\n", | |
539 | dev_name(&dev->dev), | |
540 | dev->divisor - vlynq_ldiv1 + 1); | |
541 | return 0; | |
542 | } | |
543 | break; | |
544 | case vlynq_rdiv1: | |
545 | case vlynq_rdiv2: | |
546 | case vlynq_rdiv3: | |
547 | case vlynq_rdiv4: | |
548 | case vlynq_rdiv5: | |
549 | case vlynq_rdiv6: | |
550 | case vlynq_rdiv7: | |
551 | case vlynq_rdiv8: | |
552 | writel(0, &dev->local->control); | |
553 | writel(VLYNQ_CTRL_CLOCK_INT | | |
554 | VLYNQ_CTRL_CLOCK_DIV(dev->divisor - | |
555 | vlynq_rdiv1), &dev->remote->control); | |
556 | if (vlynq_linked(dev)) { | |
557 | printk(KERN_DEBUG | |
558 | "%s: using remote clock divisor %d\n", | |
559 | dev_name(&dev->dev), | |
560 | dev->divisor - vlynq_rdiv1 + 1); | |
561 | return 0; | |
562 | } | |
563 | break; | |
564 | } | |
565 | ||
566 | ops->off(dev); | |
567 | return -ENODEV; | |
568 | } | |
569 | ||
570 | int vlynq_enable_device(struct vlynq_device *dev) | |
571 | { | |
572 | struct plat_vlynq_ops *ops = dev->dev.platform_data; | |
573 | int result = -ENODEV; | |
574 | ||
575 | result = __vlynq_enable_device(dev); | |
576 | if (result) | |
577 | return result; | |
578 | ||
579 | result = vlynq_setup_irq(dev); | |
580 | if (result) | |
581 | ops->off(dev); | |
582 | ||
583 | dev->enabled = !result; | |
584 | return result; | |
585 | } | |
586 | EXPORT_SYMBOL(vlynq_enable_device); | |
587 | ||
588 | ||
589 | void vlynq_disable_device(struct vlynq_device *dev) | |
590 | { | |
591 | struct plat_vlynq_ops *ops = dev->dev.platform_data; | |
592 | ||
593 | dev->enabled = 0; | |
594 | free_irq(dev->irq, dev); | |
595 | ops->off(dev); | |
596 | } | |
597 | EXPORT_SYMBOL(vlynq_disable_device); | |
598 | ||
599 | int vlynq_set_local_mapping(struct vlynq_device *dev, u32 tx_offset, | |
600 | struct vlynq_mapping *mapping) | |
601 | { | |
602 | int i; | |
603 | ||
604 | if (!dev->enabled) | |
605 | return -ENXIO; | |
606 | ||
607 | writel(tx_offset, &dev->local->tx_offset); | |
608 | for (i = 0; i < 4; i++) { | |
609 | writel(mapping[i].offset, &dev->local->rx_mapping[i].offset); | |
610 | writel(mapping[i].size, &dev->local->rx_mapping[i].size); | |
611 | } | |
612 | return 0; | |
613 | } | |
614 | EXPORT_SYMBOL(vlynq_set_local_mapping); | |
615 | ||
616 | int vlynq_set_remote_mapping(struct vlynq_device *dev, u32 tx_offset, | |
617 | struct vlynq_mapping *mapping) | |
618 | { | |
619 | int i; | |
620 | ||
621 | if (!dev->enabled) | |
622 | return -ENXIO; | |
623 | ||
624 | writel(tx_offset, &dev->remote->tx_offset); | |
625 | for (i = 0; i < 4; i++) { | |
626 | writel(mapping[i].offset, &dev->remote->rx_mapping[i].offset); | |
627 | writel(mapping[i].size, &dev->remote->rx_mapping[i].size); | |
628 | } | |
629 | return 0; | |
630 | } | |
631 | EXPORT_SYMBOL(vlynq_set_remote_mapping); | |
632 | ||
633 | int vlynq_set_local_irq(struct vlynq_device *dev, int virq) | |
634 | { | |
635 | int irq = dev->irq_start + virq; | |
636 | if (dev->enabled) | |
637 | return -EBUSY; | |
638 | ||
639 | if ((irq < dev->irq_start) || (irq > dev->irq_end)) | |
640 | return -EINVAL; | |
641 | ||
642 | if (virq == dev->remote_irq) | |
643 | return -EINVAL; | |
644 | ||
645 | dev->local_irq = virq; | |
646 | ||
647 | return 0; | |
648 | } | |
649 | EXPORT_SYMBOL(vlynq_set_local_irq); | |
650 | ||
651 | int vlynq_set_remote_irq(struct vlynq_device *dev, int virq) | |
652 | { | |
653 | int irq = dev->irq_start + virq; | |
654 | if (dev->enabled) | |
655 | return -EBUSY; | |
656 | ||
657 | if ((irq < dev->irq_start) || (irq > dev->irq_end)) | |
658 | return -EINVAL; | |
659 | ||
660 | if (virq == dev->local_irq) | |
661 | return -EINVAL; | |
662 | ||
663 | dev->remote_irq = virq; | |
664 | ||
665 | return 0; | |
666 | } | |
667 | EXPORT_SYMBOL(vlynq_set_remote_irq); | |
668 | ||
669 | static int vlynq_probe(struct platform_device *pdev) | |
670 | { | |
671 | struct vlynq_device *dev; | |
672 | struct resource *regs_res, *mem_res, *irq_res; | |
673 | int len, result; | |
674 | ||
675 | regs_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs"); | |
676 | if (!regs_res) | |
677 | return -ENODEV; | |
678 | ||
679 | mem_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mem"); | |
680 | if (!mem_res) | |
681 | return -ENODEV; | |
682 | ||
683 | irq_res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "devirq"); | |
684 | if (!irq_res) | |
685 | return -ENODEV; | |
686 | ||
687 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
688 | if (!dev) { | |
689 | printk(KERN_ERR | |
690 | "vlynq: failed to allocate device structure\n"); | |
691 | return -ENOMEM; | |
692 | } | |
693 | ||
694 | dev->id = pdev->id; | |
695 | dev->dev.bus = &vlynq_bus_type; | |
696 | dev->dev.parent = &pdev->dev; | |
697 | dev_set_name(&dev->dev, "vlynq%d", dev->id); | |
698 | dev->dev.platform_data = pdev->dev.platform_data; | |
699 | dev->dev.release = vlynq_device_release; | |
700 | ||
701 | dev->regs_start = regs_res->start; | |
702 | dev->regs_end = regs_res->end; | |
703 | dev->mem_start = mem_res->start; | |
704 | dev->mem_end = mem_res->end; | |
705 | ||
3354f73b | 706 | len = resource_size(regs_res); |
55e331cf FF |
707 | if (!request_mem_region(regs_res->start, len, dev_name(&dev->dev))) { |
708 | printk(KERN_ERR "%s: Can't request vlynq registers\n", | |
709 | dev_name(&dev->dev)); | |
710 | result = -ENXIO; | |
711 | goto fail_request; | |
712 | } | |
713 | ||
714 | dev->local = ioremap(regs_res->start, len); | |
715 | if (!dev->local) { | |
716 | printk(KERN_ERR "%s: Can't remap vlynq registers\n", | |
717 | dev_name(&dev->dev)); | |
718 | result = -ENXIO; | |
719 | goto fail_remap; | |
720 | } | |
721 | ||
722 | dev->remote = (struct vlynq_regs *)((void *)dev->local + | |
723 | VLYNQ_REMOTE_OFFSET); | |
724 | ||
725 | dev->irq = platform_get_irq_byname(pdev, "irq"); | |
726 | dev->irq_start = irq_res->start; | |
727 | dev->irq_end = irq_res->end; | |
728 | dev->local_irq = dev->irq_end - dev->irq_start; | |
729 | dev->remote_irq = dev->local_irq - 1; | |
730 | ||
731 | if (device_register(&dev->dev)) | |
732 | goto fail_register; | |
733 | platform_set_drvdata(pdev, dev); | |
734 | ||
735 | printk(KERN_INFO "%s: regs 0x%p, irq %d, mem 0x%p\n", | |
736 | dev_name(&dev->dev), (void *)dev->regs_start, dev->irq, | |
737 | (void *)dev->mem_start); | |
738 | ||
739 | dev->dev_id = 0; | |
740 | dev->divisor = vlynq_div_auto; | |
741 | result = __vlynq_enable_device(dev); | |
742 | if (result == 0) { | |
743 | dev->dev_id = readl(&dev->remote->chip); | |
744 | ((struct plat_vlynq_ops *)(dev->dev.platform_data))->off(dev); | |
745 | } | |
746 | if (dev->dev_id) | |
747 | printk(KERN_INFO "Found a VLYNQ device: %08x\n", dev->dev_id); | |
748 | ||
749 | return 0; | |
750 | ||
751 | fail_register: | |
752 | iounmap(dev->local); | |
753 | fail_remap: | |
754 | fail_request: | |
755 | release_mem_region(regs_res->start, len); | |
756 | kfree(dev); | |
757 | return result; | |
758 | } | |
759 | ||
760 | static int vlynq_remove(struct platform_device *pdev) | |
761 | { | |
762 | struct vlynq_device *dev = platform_get_drvdata(pdev); | |
763 | ||
764 | device_unregister(&dev->dev); | |
765 | iounmap(dev->local); | |
766 | release_mem_region(dev->regs_start, dev->regs_end - dev->regs_start); | |
767 | ||
768 | kfree(dev); | |
769 | ||
770 | return 0; | |
771 | } | |
772 | ||
773 | static struct platform_driver vlynq_platform_driver = { | |
774 | .driver.name = "vlynq", | |
775 | .probe = vlynq_probe, | |
776 | .remove = __devexit_p(vlynq_remove), | |
777 | }; | |
778 | ||
779 | struct bus_type vlynq_bus_type = { | |
780 | .name = "vlynq", | |
781 | .match = vlynq_device_match, | |
782 | .probe = vlynq_device_probe, | |
783 | .remove = vlynq_device_remove, | |
784 | }; | |
785 | EXPORT_SYMBOL(vlynq_bus_type); | |
786 | ||
787 | static int __devinit vlynq_init(void) | |
788 | { | |
789 | int res = 0; | |
790 | ||
791 | res = bus_register(&vlynq_bus_type); | |
792 | if (res) | |
793 | goto fail_bus; | |
794 | ||
795 | res = platform_driver_register(&vlynq_platform_driver); | |
796 | if (res) | |
797 | goto fail_platform; | |
798 | ||
799 | return 0; | |
800 | ||
801 | fail_platform: | |
802 | bus_unregister(&vlynq_bus_type); | |
803 | fail_bus: | |
804 | return res; | |
805 | } | |
806 | ||
807 | static void __devexit vlynq_exit(void) | |
808 | { | |
809 | platform_driver_unregister(&vlynq_platform_driver); | |
810 | bus_unregister(&vlynq_bus_type); | |
811 | } | |
812 | ||
813 | module_init(vlynq_init); | |
814 | module_exit(vlynq_exit); |