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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> |
ca4d3e67 | 34 | #include <linux/irq.h> |
55e331cf FF |
35 | |
36 | #include <linux/vlynq.h> | |
37 | ||
38 | #define VLYNQ_CTRL_PM_ENABLE 0x80000000 | |
39 | #define VLYNQ_CTRL_CLOCK_INT 0x00008000 | |
40 | #define VLYNQ_CTRL_CLOCK_DIV(x) (((x) & 7) << 16) | |
41 | #define VLYNQ_CTRL_INT_LOCAL 0x00004000 | |
42 | #define VLYNQ_CTRL_INT_ENABLE 0x00002000 | |
43 | #define VLYNQ_CTRL_INT_VECTOR(x) (((x) & 0x1f) << 8) | |
44 | #define VLYNQ_CTRL_INT2CFG 0x00000080 | |
45 | #define VLYNQ_CTRL_RESET 0x00000001 | |
46 | ||
47 | #define VLYNQ_CTRL_CLOCK_MASK (0x7 << 16) | |
48 | ||
49 | #define VLYNQ_INT_OFFSET 0x00000014 | |
50 | #define VLYNQ_REMOTE_OFFSET 0x00000080 | |
51 | ||
52 | #define VLYNQ_STATUS_LINK 0x00000001 | |
53 | #define VLYNQ_STATUS_LERROR 0x00000080 | |
54 | #define VLYNQ_STATUS_RERROR 0x00000100 | |
55 | ||
56 | #define VINT_ENABLE 0x00000100 | |
57 | #define VINT_TYPE_EDGE 0x00000080 | |
58 | #define VINT_LEVEL_LOW 0x00000040 | |
59 | #define VINT_VECTOR(x) ((x) & 0x1f) | |
60 | #define VINT_OFFSET(irq) (8 * ((irq) % 4)) | |
61 | ||
62 | #define VLYNQ_AUTONEGO_V2 0x00010000 | |
63 | ||
64 | struct vlynq_regs { | |
65 | u32 revision; | |
66 | u32 control; | |
67 | u32 status; | |
68 | u32 int_prio; | |
69 | u32 int_status; | |
70 | u32 int_pending; | |
71 | u32 int_ptr; | |
72 | u32 tx_offset; | |
73 | struct vlynq_mapping rx_mapping[4]; | |
74 | u32 chip; | |
75 | u32 autonego; | |
76 | u32 unused[6]; | |
77 | u32 int_device[8]; | |
78 | }; | |
79 | ||
9e2db5c9 | 80 | #ifdef CONFIG_VLYNQ_DEBUG |
55e331cf FF |
81 | static void vlynq_dump_regs(struct vlynq_device *dev) |
82 | { | |
83 | int i; | |
84 | ||
85 | printk(KERN_DEBUG "VLYNQ local=%p remote=%p\n", | |
86 | dev->local, dev->remote); | |
87 | for (i = 0; i < 32; i++) { | |
88 | printk(KERN_DEBUG "VLYNQ: local %d: %08x\n", | |
89 | i + 1, ((u32 *)dev->local)[i]); | |
90 | printk(KERN_DEBUG "VLYNQ: remote %d: %08x\n", | |
91 | i + 1, ((u32 *)dev->remote)[i]); | |
92 | } | |
93 | } | |
94 | ||
95 | static void vlynq_dump_mem(u32 *base, int count) | |
96 | { | |
97 | int i; | |
98 | ||
99 | for (i = 0; i < (count + 3) / 4; i++) { | |
100 | if (i % 4 == 0) | |
101 | printk(KERN_DEBUG "\nMEM[0x%04x]:", i * 4); | |
102 | printk(KERN_DEBUG " 0x%08x", *(base + i)); | |
103 | } | |
104 | printk(KERN_DEBUG "\n"); | |
105 | } | |
106 | #endif | |
107 | ||
108 | /* Check the VLYNQ link status with a given device */ | |
109 | static int vlynq_linked(struct vlynq_device *dev) | |
110 | { | |
111 | int i; | |
112 | ||
113 | for (i = 0; i < 100; i++) | |
114 | if (readl(&dev->local->status) & VLYNQ_STATUS_LINK) | |
115 | return 1; | |
116 | else | |
117 | cpu_relax(); | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
122 | static void vlynq_reset(struct vlynq_device *dev) | |
123 | { | |
124 | writel(readl(&dev->local->control) | VLYNQ_CTRL_RESET, | |
125 | &dev->local->control); | |
126 | ||
127 | /* Wait for the devices to finish resetting */ | |
128 | msleep(5); | |
129 | ||
130 | /* Remove reset bit */ | |
131 | writel(readl(&dev->local->control) & ~VLYNQ_CTRL_RESET, | |
132 | &dev->local->control); | |
133 | ||
134 | /* Give some time for the devices to settle */ | |
135 | msleep(5); | |
136 | } | |
137 | ||
138 | static void vlynq_irq_unmask(unsigned int irq) | |
139 | { | |
140 | u32 val; | |
141 | struct vlynq_device *dev = get_irq_chip_data(irq); | |
142 | int virq; | |
143 | ||
144 | BUG_ON(!dev); | |
145 | virq = irq - dev->irq_start; | |
146 | val = readl(&dev->remote->int_device[virq >> 2]); | |
147 | val |= (VINT_ENABLE | virq) << VINT_OFFSET(virq); | |
148 | writel(val, &dev->remote->int_device[virq >> 2]); | |
149 | } | |
150 | ||
151 | static void vlynq_irq_mask(unsigned int irq) | |
152 | { | |
153 | u32 val; | |
154 | struct vlynq_device *dev = get_irq_chip_data(irq); | |
155 | int virq; | |
156 | ||
157 | BUG_ON(!dev); | |
158 | virq = irq - dev->irq_start; | |
159 | val = readl(&dev->remote->int_device[virq >> 2]); | |
160 | val &= ~(VINT_ENABLE << VINT_OFFSET(virq)); | |
161 | writel(val, &dev->remote->int_device[virq >> 2]); | |
162 | } | |
163 | ||
164 | static int vlynq_irq_type(unsigned int irq, unsigned int flow_type) | |
165 | { | |
166 | u32 val; | |
167 | struct vlynq_device *dev = get_irq_chip_data(irq); | |
168 | int virq; | |
169 | ||
170 | BUG_ON(!dev); | |
171 | virq = irq - dev->irq_start; | |
172 | val = readl(&dev->remote->int_device[virq >> 2]); | |
173 | switch (flow_type & IRQ_TYPE_SENSE_MASK) { | |
174 | case IRQ_TYPE_EDGE_RISING: | |
175 | case IRQ_TYPE_EDGE_FALLING: | |
176 | case IRQ_TYPE_EDGE_BOTH: | |
177 | val |= VINT_TYPE_EDGE << VINT_OFFSET(virq); | |
178 | val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq)); | |
179 | break; | |
180 | case IRQ_TYPE_LEVEL_HIGH: | |
181 | val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq)); | |
182 | val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq)); | |
183 | break; | |
184 | case IRQ_TYPE_LEVEL_LOW: | |
185 | val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq)); | |
186 | val |= VINT_LEVEL_LOW << VINT_OFFSET(virq); | |
187 | break; | |
188 | default: | |
189 | return -EINVAL; | |
190 | } | |
191 | writel(val, &dev->remote->int_device[virq >> 2]); | |
192 | return 0; | |
193 | } | |
194 | ||
195 | static void vlynq_local_ack(unsigned int irq) | |
196 | { | |
197 | struct vlynq_device *dev = get_irq_chip_data(irq); | |
198 | ||
199 | u32 status = readl(&dev->local->status); | |
200 | ||
201 | pr_debug("%s: local status: 0x%08x\n", | |
202 | dev_name(&dev->dev), status); | |
203 | writel(status, &dev->local->status); | |
204 | } | |
205 | ||
206 | static void vlynq_remote_ack(unsigned int irq) | |
207 | { | |
208 | struct vlynq_device *dev = get_irq_chip_data(irq); | |
209 | ||
210 | u32 status = readl(&dev->remote->status); | |
211 | ||
212 | pr_debug("%s: remote status: 0x%08x\n", | |
213 | dev_name(&dev->dev), status); | |
214 | writel(status, &dev->remote->status); | |
215 | } | |
216 | ||
217 | static irqreturn_t vlynq_irq(int irq, void *dev_id) | |
218 | { | |
219 | struct vlynq_device *dev = dev_id; | |
220 | u32 status; | |
221 | int virq = 0; | |
222 | ||
223 | status = readl(&dev->local->int_status); | |
224 | writel(status, &dev->local->int_status); | |
225 | ||
226 | if (unlikely(!status)) | |
227 | spurious_interrupt(); | |
228 | ||
229 | while (status) { | |
230 | if (status & 1) | |
231 | do_IRQ(dev->irq_start + virq); | |
232 | status >>= 1; | |
233 | virq++; | |
234 | } | |
235 | ||
236 | return IRQ_HANDLED; | |
237 | } | |
238 | ||
239 | static struct irq_chip vlynq_irq_chip = { | |
240 | .name = "vlynq", | |
241 | .unmask = vlynq_irq_unmask, | |
242 | .mask = vlynq_irq_mask, | |
243 | .set_type = vlynq_irq_type, | |
244 | }; | |
245 | ||
246 | static struct irq_chip vlynq_local_chip = { | |
247 | .name = "vlynq local error", | |
248 | .unmask = vlynq_irq_unmask, | |
249 | .mask = vlynq_irq_mask, | |
250 | .ack = vlynq_local_ack, | |
251 | }; | |
252 | ||
253 | static struct irq_chip vlynq_remote_chip = { | |
254 | .name = "vlynq local error", | |
255 | .unmask = vlynq_irq_unmask, | |
256 | .mask = vlynq_irq_mask, | |
257 | .ack = vlynq_remote_ack, | |
258 | }; | |
259 | ||
260 | static int vlynq_setup_irq(struct vlynq_device *dev) | |
261 | { | |
262 | u32 val; | |
263 | int i, virq; | |
264 | ||
265 | if (dev->local_irq == dev->remote_irq) { | |
266 | printk(KERN_ERR | |
267 | "%s: local vlynq irq should be different from remote\n", | |
268 | dev_name(&dev->dev)); | |
269 | return -EINVAL; | |
270 | } | |
271 | ||
272 | /* Clear local and remote error bits */ | |
273 | writel(readl(&dev->local->status), &dev->local->status); | |
274 | writel(readl(&dev->remote->status), &dev->remote->status); | |
275 | ||
276 | /* Now setup interrupts */ | |
277 | val = VLYNQ_CTRL_INT_VECTOR(dev->local_irq); | |
278 | val |= VLYNQ_CTRL_INT_ENABLE | VLYNQ_CTRL_INT_LOCAL | | |
279 | VLYNQ_CTRL_INT2CFG; | |
280 | val |= readl(&dev->local->control); | |
281 | writel(VLYNQ_INT_OFFSET, &dev->local->int_ptr); | |
282 | writel(val, &dev->local->control); | |
283 | ||
284 | val = VLYNQ_CTRL_INT_VECTOR(dev->remote_irq); | |
285 | val |= VLYNQ_CTRL_INT_ENABLE; | |
286 | val |= readl(&dev->remote->control); | |
287 | writel(VLYNQ_INT_OFFSET, &dev->remote->int_ptr); | |
288 | writel(val, &dev->remote->int_ptr); | |
289 | writel(val, &dev->remote->control); | |
290 | ||
291 | for (i = dev->irq_start; i <= dev->irq_end; i++) { | |
292 | virq = i - dev->irq_start; | |
293 | if (virq == dev->local_irq) { | |
294 | set_irq_chip_and_handler(i, &vlynq_local_chip, | |
295 | handle_level_irq); | |
296 | set_irq_chip_data(i, dev); | |
297 | } else if (virq == dev->remote_irq) { | |
298 | set_irq_chip_and_handler(i, &vlynq_remote_chip, | |
299 | handle_level_irq); | |
300 | set_irq_chip_data(i, dev); | |
301 | } else { | |
302 | set_irq_chip_and_handler(i, &vlynq_irq_chip, | |
303 | handle_simple_irq); | |
304 | set_irq_chip_data(i, dev); | |
305 | writel(0, &dev->remote->int_device[virq >> 2]); | |
306 | } | |
307 | } | |
308 | ||
309 | if (request_irq(dev->irq, vlynq_irq, IRQF_SHARED, "vlynq", dev)) { | |
310 | printk(KERN_ERR "%s: request_irq failed\n", | |
311 | dev_name(&dev->dev)); | |
312 | return -EAGAIN; | |
313 | } | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
318 | static void vlynq_device_release(struct device *dev) | |
319 | { | |
320 | struct vlynq_device *vdev = to_vlynq_device(dev); | |
321 | kfree(vdev); | |
322 | } | |
323 | ||
324 | static int vlynq_device_match(struct device *dev, | |
325 | struct device_driver *drv) | |
326 | { | |
327 | struct vlynq_device *vdev = to_vlynq_device(dev); | |
328 | struct vlynq_driver *vdrv = to_vlynq_driver(drv); | |
329 | struct vlynq_device_id *ids = vdrv->id_table; | |
330 | ||
331 | while (ids->id) { | |
332 | if (ids->id == vdev->dev_id) { | |
333 | vdev->divisor = ids->divisor; | |
334 | vlynq_set_drvdata(vdev, ids); | |
335 | printk(KERN_INFO "Driver found for VLYNQ " | |
336 | "device: %08x\n", vdev->dev_id); | |
337 | return 1; | |
338 | } | |
339 | printk(KERN_DEBUG "Not using the %08x VLYNQ device's driver" | |
340 | " for VLYNQ device: %08x\n", ids->id, vdev->dev_id); | |
341 | ids++; | |
342 | } | |
343 | return 0; | |
344 | } | |
345 | ||
346 | static int vlynq_device_probe(struct device *dev) | |
347 | { | |
348 | struct vlynq_device *vdev = to_vlynq_device(dev); | |
349 | struct vlynq_driver *drv = to_vlynq_driver(dev->driver); | |
350 | struct vlynq_device_id *id = vlynq_get_drvdata(vdev); | |
351 | int result = -ENODEV; | |
352 | ||
353 | if (drv->probe) | |
354 | result = drv->probe(vdev, id); | |
355 | if (result) | |
356 | put_device(dev); | |
357 | return result; | |
358 | } | |
359 | ||
360 | static int vlynq_device_remove(struct device *dev) | |
361 | { | |
362 | struct vlynq_driver *drv = to_vlynq_driver(dev->driver); | |
363 | ||
364 | if (drv->remove) | |
365 | drv->remove(to_vlynq_device(dev)); | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | int __vlynq_register_driver(struct vlynq_driver *driver, struct module *owner) | |
371 | { | |
372 | driver->driver.name = driver->name; | |
373 | driver->driver.bus = &vlynq_bus_type; | |
374 | return driver_register(&driver->driver); | |
375 | } | |
376 | EXPORT_SYMBOL(__vlynq_register_driver); | |
377 | ||
378 | void vlynq_unregister_driver(struct vlynq_driver *driver) | |
379 | { | |
380 | driver_unregister(&driver->driver); | |
381 | } | |
382 | EXPORT_SYMBOL(vlynq_unregister_driver); | |
383 | ||
384 | /* | |
385 | * A VLYNQ remote device can clock the VLYNQ bus master | |
386 | * using a dedicated clock line. In that case, both the | |
387 | * remove device and the bus master should have the same | |
388 | * serial clock dividers configured. Iterate through the | |
389 | * 8 possible dividers until we actually link with the | |
390 | * device. | |
391 | */ | |
392 | static int __vlynq_try_remote(struct vlynq_device *dev) | |
393 | { | |
394 | int i; | |
395 | ||
396 | vlynq_reset(dev); | |
397 | for (i = dev->dev_id ? vlynq_rdiv2 : vlynq_rdiv8; dev->dev_id ? | |
398 | i <= vlynq_rdiv8 : i >= vlynq_rdiv2; | |
399 | dev->dev_id ? i++ : i--) { | |
400 | ||
401 | if (!vlynq_linked(dev)) | |
402 | break; | |
403 | ||
404 | writel((readl(&dev->remote->control) & | |
405 | ~VLYNQ_CTRL_CLOCK_MASK) | | |
406 | VLYNQ_CTRL_CLOCK_INT | | |
407 | VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1), | |
408 | &dev->remote->control); | |
409 | writel((readl(&dev->local->control) | |
410 | & ~(VLYNQ_CTRL_CLOCK_INT | | |
411 | VLYNQ_CTRL_CLOCK_MASK)) | | |
412 | VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1), | |
413 | &dev->local->control); | |
414 | ||
415 | if (vlynq_linked(dev)) { | |
416 | printk(KERN_DEBUG | |
417 | "%s: using remote clock divisor %d\n", | |
418 | dev_name(&dev->dev), i - vlynq_rdiv1 + 1); | |
419 | dev->divisor = i; | |
420 | return 0; | |
421 | } else { | |
422 | vlynq_reset(dev); | |
423 | } | |
424 | } | |
425 | ||
426 | return -ENODEV; | |
427 | } | |
428 | ||
429 | /* | |
430 | * A VLYNQ remote device can be clocked by the VLYNQ bus | |
431 | * master using a dedicated clock line. In that case, only | |
432 | * the bus master configures the serial clock divider. | |
433 | * Iterate through the 8 possible dividers until we | |
434 | * actually get a link with the device. | |
435 | */ | |
436 | static int __vlynq_try_local(struct vlynq_device *dev) | |
437 | { | |
438 | int i; | |
439 | ||
440 | vlynq_reset(dev); | |
441 | ||
442 | for (i = dev->dev_id ? vlynq_ldiv2 : vlynq_ldiv8; dev->dev_id ? | |
443 | i <= vlynq_ldiv8 : i >= vlynq_ldiv2; | |
444 | dev->dev_id ? i++ : i--) { | |
445 | ||
446 | writel((readl(&dev->local->control) & | |
447 | ~VLYNQ_CTRL_CLOCK_MASK) | | |
448 | VLYNQ_CTRL_CLOCK_INT | | |
449 | VLYNQ_CTRL_CLOCK_DIV(i - vlynq_ldiv1), | |
450 | &dev->local->control); | |
451 | ||
452 | if (vlynq_linked(dev)) { | |
453 | printk(KERN_DEBUG | |
454 | "%s: using local clock divisor %d\n", | |
455 | dev_name(&dev->dev), i - vlynq_ldiv1 + 1); | |
456 | dev->divisor = i; | |
457 | return 0; | |
458 | } else { | |
459 | vlynq_reset(dev); | |
460 | } | |
461 | } | |
462 | ||
463 | return -ENODEV; | |
464 | } | |
465 | ||
466 | /* | |
467 | * When using external clocking method, serial clock | |
468 | * is supplied by an external oscillator, therefore we | |
469 | * should mask the local clock bit in the clock control | |
470 | * register for both the bus master and the remote device. | |
471 | */ | |
472 | static int __vlynq_try_external(struct vlynq_device *dev) | |
473 | { | |
474 | vlynq_reset(dev); | |
475 | if (!vlynq_linked(dev)) | |
476 | return -ENODEV; | |
477 | ||
478 | writel((readl(&dev->remote->control) & | |
479 | ~VLYNQ_CTRL_CLOCK_INT), | |
480 | &dev->remote->control); | |
481 | ||
482 | writel((readl(&dev->local->control) & | |
483 | ~VLYNQ_CTRL_CLOCK_INT), | |
484 | &dev->local->control); | |
485 | ||
486 | if (vlynq_linked(dev)) { | |
487 | printk(KERN_DEBUG "%s: using external clock\n", | |
488 | dev_name(&dev->dev)); | |
489 | dev->divisor = vlynq_div_external; | |
490 | return 0; | |
491 | } | |
492 | ||
493 | return -ENODEV; | |
494 | } | |
495 | ||
496 | static int __vlynq_enable_device(struct vlynq_device *dev) | |
497 | { | |
498 | int result; | |
499 | struct plat_vlynq_ops *ops = dev->dev.platform_data; | |
500 | ||
501 | result = ops->on(dev); | |
502 | if (result) | |
503 | return result; | |
504 | ||
505 | switch (dev->divisor) { | |
506 | case vlynq_div_external: | |
507 | case vlynq_div_auto: | |
508 | /* When the device is brought from reset it should have clock | |
509 | * generation negotiated by hardware. | |
510 | * Check which device is generating clocks and perform setup | |
511 | * accordingly */ | |
512 | if (vlynq_linked(dev) && readl(&dev->remote->control) & | |
513 | VLYNQ_CTRL_CLOCK_INT) { | |
514 | if (!__vlynq_try_remote(dev) || | |
515 | !__vlynq_try_local(dev) || | |
516 | !__vlynq_try_external(dev)) | |
517 | return 0; | |
518 | } else { | |
519 | if (!__vlynq_try_external(dev) || | |
520 | !__vlynq_try_local(dev) || | |
521 | !__vlynq_try_remote(dev)) | |
522 | return 0; | |
523 | } | |
524 | break; | |
525 | case vlynq_ldiv1: | |
526 | case vlynq_ldiv2: | |
527 | case vlynq_ldiv3: | |
528 | case vlynq_ldiv4: | |
529 | case vlynq_ldiv5: | |
530 | case vlynq_ldiv6: | |
531 | case vlynq_ldiv7: | |
532 | case vlynq_ldiv8: | |
533 | writel(VLYNQ_CTRL_CLOCK_INT | | |
534 | VLYNQ_CTRL_CLOCK_DIV(dev->divisor - | |
535 | vlynq_ldiv1), &dev->local->control); | |
536 | writel(0, &dev->remote->control); | |
537 | if (vlynq_linked(dev)) { | |
538 | printk(KERN_DEBUG | |
539 | "%s: using local clock divisor %d\n", | |
540 | dev_name(&dev->dev), | |
541 | dev->divisor - vlynq_ldiv1 + 1); | |
542 | return 0; | |
543 | } | |
544 | break; | |
545 | case vlynq_rdiv1: | |
546 | case vlynq_rdiv2: | |
547 | case vlynq_rdiv3: | |
548 | case vlynq_rdiv4: | |
549 | case vlynq_rdiv5: | |
550 | case vlynq_rdiv6: | |
551 | case vlynq_rdiv7: | |
552 | case vlynq_rdiv8: | |
553 | writel(0, &dev->local->control); | |
554 | writel(VLYNQ_CTRL_CLOCK_INT | | |
555 | VLYNQ_CTRL_CLOCK_DIV(dev->divisor - | |
556 | vlynq_rdiv1), &dev->remote->control); | |
557 | if (vlynq_linked(dev)) { | |
558 | printk(KERN_DEBUG | |
559 | "%s: using remote clock divisor %d\n", | |
560 | dev_name(&dev->dev), | |
561 | dev->divisor - vlynq_rdiv1 + 1); | |
562 | return 0; | |
563 | } | |
564 | break; | |
565 | } | |
566 | ||
567 | ops->off(dev); | |
568 | return -ENODEV; | |
569 | } | |
570 | ||
571 | int vlynq_enable_device(struct vlynq_device *dev) | |
572 | { | |
573 | struct plat_vlynq_ops *ops = dev->dev.platform_data; | |
574 | int result = -ENODEV; | |
575 | ||
576 | result = __vlynq_enable_device(dev); | |
577 | if (result) | |
578 | return result; | |
579 | ||
580 | result = vlynq_setup_irq(dev); | |
581 | if (result) | |
582 | ops->off(dev); | |
583 | ||
584 | dev->enabled = !result; | |
585 | return result; | |
586 | } | |
587 | EXPORT_SYMBOL(vlynq_enable_device); | |
588 | ||
589 | ||
590 | void vlynq_disable_device(struct vlynq_device *dev) | |
591 | { | |
592 | struct plat_vlynq_ops *ops = dev->dev.platform_data; | |
593 | ||
594 | dev->enabled = 0; | |
595 | free_irq(dev->irq, dev); | |
596 | ops->off(dev); | |
597 | } | |
598 | EXPORT_SYMBOL(vlynq_disable_device); | |
599 | ||
600 | int vlynq_set_local_mapping(struct vlynq_device *dev, u32 tx_offset, | |
601 | struct vlynq_mapping *mapping) | |
602 | { | |
603 | int i; | |
604 | ||
605 | if (!dev->enabled) | |
606 | return -ENXIO; | |
607 | ||
608 | writel(tx_offset, &dev->local->tx_offset); | |
609 | for (i = 0; i < 4; i++) { | |
610 | writel(mapping[i].offset, &dev->local->rx_mapping[i].offset); | |
611 | writel(mapping[i].size, &dev->local->rx_mapping[i].size); | |
612 | } | |
613 | return 0; | |
614 | } | |
615 | EXPORT_SYMBOL(vlynq_set_local_mapping); | |
616 | ||
617 | int vlynq_set_remote_mapping(struct vlynq_device *dev, u32 tx_offset, | |
618 | struct vlynq_mapping *mapping) | |
619 | { | |
620 | int i; | |
621 | ||
622 | if (!dev->enabled) | |
623 | return -ENXIO; | |
624 | ||
625 | writel(tx_offset, &dev->remote->tx_offset); | |
626 | for (i = 0; i < 4; i++) { | |
627 | writel(mapping[i].offset, &dev->remote->rx_mapping[i].offset); | |
628 | writel(mapping[i].size, &dev->remote->rx_mapping[i].size); | |
629 | } | |
630 | return 0; | |
631 | } | |
632 | EXPORT_SYMBOL(vlynq_set_remote_mapping); | |
633 | ||
634 | int vlynq_set_local_irq(struct vlynq_device *dev, int virq) | |
635 | { | |
636 | int irq = dev->irq_start + virq; | |
637 | if (dev->enabled) | |
638 | return -EBUSY; | |
639 | ||
640 | if ((irq < dev->irq_start) || (irq > dev->irq_end)) | |
641 | return -EINVAL; | |
642 | ||
643 | if (virq == dev->remote_irq) | |
644 | return -EINVAL; | |
645 | ||
646 | dev->local_irq = virq; | |
647 | ||
648 | return 0; | |
649 | } | |
650 | EXPORT_SYMBOL(vlynq_set_local_irq); | |
651 | ||
652 | int vlynq_set_remote_irq(struct vlynq_device *dev, int virq) | |
653 | { | |
654 | int irq = dev->irq_start + virq; | |
655 | if (dev->enabled) | |
656 | return -EBUSY; | |
657 | ||
658 | if ((irq < dev->irq_start) || (irq > dev->irq_end)) | |
659 | return -EINVAL; | |
660 | ||
661 | if (virq == dev->local_irq) | |
662 | return -EINVAL; | |
663 | ||
664 | dev->remote_irq = virq; | |
665 | ||
666 | return 0; | |
667 | } | |
668 | EXPORT_SYMBOL(vlynq_set_remote_irq); | |
669 | ||
670 | static int vlynq_probe(struct platform_device *pdev) | |
671 | { | |
672 | struct vlynq_device *dev; | |
673 | struct resource *regs_res, *mem_res, *irq_res; | |
674 | int len, result; | |
675 | ||
676 | regs_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs"); | |
677 | if (!regs_res) | |
678 | return -ENODEV; | |
679 | ||
680 | mem_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mem"); | |
681 | if (!mem_res) | |
682 | return -ENODEV; | |
683 | ||
684 | irq_res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "devirq"); | |
685 | if (!irq_res) | |
686 | return -ENODEV; | |
687 | ||
688 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
689 | if (!dev) { | |
690 | printk(KERN_ERR | |
691 | "vlynq: failed to allocate device structure\n"); | |
692 | return -ENOMEM; | |
693 | } | |
694 | ||
695 | dev->id = pdev->id; | |
696 | dev->dev.bus = &vlynq_bus_type; | |
697 | dev->dev.parent = &pdev->dev; | |
698 | dev_set_name(&dev->dev, "vlynq%d", dev->id); | |
699 | dev->dev.platform_data = pdev->dev.platform_data; | |
700 | dev->dev.release = vlynq_device_release; | |
701 | ||
702 | dev->regs_start = regs_res->start; | |
703 | dev->regs_end = regs_res->end; | |
704 | dev->mem_start = mem_res->start; | |
705 | dev->mem_end = mem_res->end; | |
706 | ||
3354f73b | 707 | len = resource_size(regs_res); |
55e331cf FF |
708 | if (!request_mem_region(regs_res->start, len, dev_name(&dev->dev))) { |
709 | printk(KERN_ERR "%s: Can't request vlynq registers\n", | |
710 | dev_name(&dev->dev)); | |
711 | result = -ENXIO; | |
712 | goto fail_request; | |
713 | } | |
714 | ||
715 | dev->local = ioremap(regs_res->start, len); | |
716 | if (!dev->local) { | |
717 | printk(KERN_ERR "%s: Can't remap vlynq registers\n", | |
718 | dev_name(&dev->dev)); | |
719 | result = -ENXIO; | |
720 | goto fail_remap; | |
721 | } | |
722 | ||
723 | dev->remote = (struct vlynq_regs *)((void *)dev->local + | |
724 | VLYNQ_REMOTE_OFFSET); | |
725 | ||
726 | dev->irq = platform_get_irq_byname(pdev, "irq"); | |
727 | dev->irq_start = irq_res->start; | |
728 | dev->irq_end = irq_res->end; | |
729 | dev->local_irq = dev->irq_end - dev->irq_start; | |
730 | dev->remote_irq = dev->local_irq - 1; | |
731 | ||
732 | if (device_register(&dev->dev)) | |
733 | goto fail_register; | |
734 | platform_set_drvdata(pdev, dev); | |
735 | ||
736 | printk(KERN_INFO "%s: regs 0x%p, irq %d, mem 0x%p\n", | |
737 | dev_name(&dev->dev), (void *)dev->regs_start, dev->irq, | |
738 | (void *)dev->mem_start); | |
739 | ||
740 | dev->dev_id = 0; | |
741 | dev->divisor = vlynq_div_auto; | |
742 | result = __vlynq_enable_device(dev); | |
743 | if (result == 0) { | |
744 | dev->dev_id = readl(&dev->remote->chip); | |
745 | ((struct plat_vlynq_ops *)(dev->dev.platform_data))->off(dev); | |
746 | } | |
747 | if (dev->dev_id) | |
748 | printk(KERN_INFO "Found a VLYNQ device: %08x\n", dev->dev_id); | |
749 | ||
750 | return 0; | |
751 | ||
752 | fail_register: | |
753 | iounmap(dev->local); | |
754 | fail_remap: | |
755 | fail_request: | |
756 | release_mem_region(regs_res->start, len); | |
757 | kfree(dev); | |
758 | return result; | |
759 | } | |
760 | ||
761 | static int vlynq_remove(struct platform_device *pdev) | |
762 | { | |
763 | struct vlynq_device *dev = platform_get_drvdata(pdev); | |
764 | ||
765 | device_unregister(&dev->dev); | |
766 | iounmap(dev->local); | |
767 | release_mem_region(dev->regs_start, dev->regs_end - dev->regs_start); | |
768 | ||
769 | kfree(dev); | |
770 | ||
771 | return 0; | |
772 | } | |
773 | ||
774 | static struct platform_driver vlynq_platform_driver = { | |
775 | .driver.name = "vlynq", | |
776 | .probe = vlynq_probe, | |
777 | .remove = __devexit_p(vlynq_remove), | |
778 | }; | |
779 | ||
780 | struct bus_type vlynq_bus_type = { | |
781 | .name = "vlynq", | |
782 | .match = vlynq_device_match, | |
783 | .probe = vlynq_device_probe, | |
784 | .remove = vlynq_device_remove, | |
785 | }; | |
786 | EXPORT_SYMBOL(vlynq_bus_type); | |
787 | ||
788 | static int __devinit vlynq_init(void) | |
789 | { | |
790 | int res = 0; | |
791 | ||
792 | res = bus_register(&vlynq_bus_type); | |
793 | if (res) | |
794 | goto fail_bus; | |
795 | ||
796 | res = platform_driver_register(&vlynq_platform_driver); | |
797 | if (res) | |
798 | goto fail_platform; | |
799 | ||
800 | return 0; | |
801 | ||
802 | fail_platform: | |
803 | bus_unregister(&vlynq_bus_type); | |
804 | fail_bus: | |
805 | return res; | |
806 | } | |
807 | ||
808 | static void __devexit vlynq_exit(void) | |
809 | { | |
810 | platform_driver_unregister(&vlynq_platform_driver); | |
811 | bus_unregister(&vlynq_bus_type); | |
812 | } | |
813 | ||
814 | module_init(vlynq_init); | |
815 | module_exit(vlynq_exit); |