1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22#include <linux/bcma/bcma.h>
23#include <linux/delay.h>
24#include <linux/gpio/consumer.h>
25#include <linux/platform_device.h>
26#include <linux/module.h>
27#include <linux/slab.h>
28#include <linux/of.h>
29#include <linux/of_gpio.h>
30#include <linux/of_platform.h>
31#include <linux/usb/ehci_pdriver.h>
32#include <linux/usb/ohci_pdriver.h>
33
34MODULE_AUTHOR("Hauke Mehrtens");
35MODULE_DESCRIPTION("Common USB driver for BCMA Bus");
36MODULE_LICENSE("GPL");
37
38
39#define USB_BCMA_CLKCTLST_USB_CLK_REQ 0x00000100
40
41struct bcma_hcd_device {
42 struct bcma_device *core;
43 struct platform_device *ehci_dev;
44 struct platform_device *ohci_dev;
45 struct gpio_desc *gpio_desc;
46};
47
48
49
50
51static int bcma_wait_bits(struct bcma_device *dev, u16 reg, u32 bitmask,
52 int timeout)
53{
54 int i;
55 u32 val;
56
57 for (i = 0; i < timeout; i++) {
58 val = bcma_read32(dev, reg);
59 if ((val & bitmask) == bitmask)
60 return 0;
61 udelay(10);
62 }
63
64 return -ETIMEDOUT;
65}
66
67static void bcma_hcd_4716wa(struct bcma_device *dev)
68{
69#ifdef CONFIG_BCMA_DRIVER_MIPS
70
71 if (dev->bus->chipinfo.id == 0x4716) {
72 u32 tmp;
73
74 tmp = bcma_cpu_clock(&dev->bus->drv_mips);
75 if (tmp >= 480000000)
76 tmp = 0x1846b;
77 else if (tmp == 453000000)
78 tmp = 0x1046b;
79 else
80 tmp = 0;
81
82
83
84
85 if (tmp) {
86 bcma_write32(dev, 0x524, 0x1);
87 udelay(500);
88
89 bcma_write32(dev, 0x524, tmp);
90 udelay(500);
91 bcma_write32(dev, 0x524, 0x4ab);
92 udelay(500);
93 bcma_read32(dev, 0x528);
94 bcma_write32(dev, 0x528, 0x80000000);
95 }
96 }
97#endif
98}
99
100
101static void bcma_hcd_init_chip_mips(struct bcma_device *dev)
102{
103 u32 tmp;
104
105
106
107
108
109
110
111
112
113
114
115 if (!bcma_core_is_enabled(dev)) {
116 bcma_core_enable(dev, 0);
117 mdelay(10);
118 if (dev->id.rev >= 5) {
119
120 tmp = bcma_read32(dev, 0x1e0);
121 tmp |= 0x100;
122 bcma_write32(dev, 0x1e0, tmp);
123 if (bcma_wait_bits(dev, 0x1e0, 1 << 24, 100))
124 printk(KERN_EMERG "Failed to enable misc PPL!\n");
125
126
127 bcma_write32(dev, 0x200, 0x4ff);
128 udelay(25);
129 bcma_write32(dev, 0x200, 0x6ff);
130 udelay(25);
131
132
133 bcma_write32(dev, 0x524, 0x6b);
134 udelay(50);
135 tmp = bcma_read32(dev, 0x524);
136 udelay(50);
137 bcma_write32(dev, 0x524, 0xab);
138 udelay(50);
139 tmp = bcma_read32(dev, 0x524);
140 udelay(50);
141 bcma_write32(dev, 0x524, 0x2b);
142 udelay(50);
143 tmp = bcma_read32(dev, 0x524);
144 udelay(50);
145 bcma_write32(dev, 0x524, 0x10ab);
146 udelay(50);
147 tmp = bcma_read32(dev, 0x524);
148
149 if (bcma_wait_bits(dev, 0x528, 0xc000, 10000)) {
150 tmp = bcma_read32(dev, 0x528);
151 printk(KERN_EMERG
152 "USB20H mdio_rddata 0x%08x\n", tmp);
153 }
154 bcma_write32(dev, 0x528, 0x80000000);
155 tmp = bcma_read32(dev, 0x314);
156 udelay(265);
157 bcma_write32(dev, 0x200, 0x7ff);
158 udelay(10);
159
160
161 bcma_write32(dev, 0x510, 0);
162 } else {
163 bcma_write32(dev, 0x200, 0x7ff);
164
165 udelay(1);
166 }
167
168 bcma_hcd_4716wa(dev);
169 }
170}
171
172
173
174
175
176
177
178
179
180static int bcma_hcd_usb20_old_arm_init(struct bcma_hcd_device *usb_dev)
181{
182 struct bcma_device *core = usb_dev->core;
183 struct device *dev = &core->dev;
184 struct bcma_device *pmu_core;
185
186 usleep_range(10000, 20000);
187 if (core->id.rev < 5)
188 return 0;
189
190 pmu_core = bcma_find_core(core->bus, BCMA_CORE_PMU);
191 if (!pmu_core) {
192 dev_err(dev, "Could not find PMU core\n");
193 return -ENOENT;
194 }
195
196
197 bcma_awrite32(core, BCMA_IOCTL, BCMA_IOCTL_CLK | BCMA_IOCTL_FGC);
198 usleep_range(100, 200);
199 bcma_awrite32(core, BCMA_RESET_CTL, BCMA_RESET_CTL_RESET);
200 usleep_range(100, 200);
201 bcma_awrite32(core, BCMA_RESET_CTL, 0);
202 usleep_range(100, 200);
203 bcma_awrite32(core, BCMA_IOCTL, BCMA_IOCTL_CLK);
204 usleep_range(100, 200);
205
206
207 bcma_write32(core, BCMA_CLKCTLST, BCMA_CLKCTLST_FORCEHT |
208 BCMA_CLKCTLST_HQCLKREQ |
209 USB_BCMA_CLKCTLST_USB_CLK_REQ);
210 usleep_range(100, 200);
211
212 bcma_write32(core, 0x510, 0xc7f85000);
213 bcma_write32(core, 0x510, 0xc7f85003);
214 usleep_range(300, 600);
215
216
217 bcma_write32(pmu_core, BCMA_CC_PMU_PLLCTL_ADDR, 0x6);
218 bcma_write32(pmu_core, BCMA_CC_PMU_PLLCTL_DATA, 0x005360c1);
219 usleep_range(100, 200);
220 bcma_write32(pmu_core, BCMA_CC_PMU_PLLCTL_ADDR, 0x7);
221 bcma_write32(pmu_core, BCMA_CC_PMU_PLLCTL_DATA, 0x0);
222 usleep_range(100, 200);
223 bcma_set32(pmu_core, BCMA_CC_PMU_CTL, BCMA_CC_PMU_CTL_PLL_UPD);
224 usleep_range(100, 200);
225
226 bcma_write32(core, 0x510, 0x7f8d007);
227 udelay(1000);
228
229
230 bcma_write32(core, 0x200, 0x4ff);
231 usleep_range(25, 50);
232 bcma_write32(core, 0x200, 0x6ff);
233 usleep_range(25, 50);
234 bcma_write32(core, 0x200, 0x7ff);
235 usleep_range(25, 50);
236
237 of_platform_default_populate(dev->of_node, NULL, dev);
238
239 return 0;
240}
241
242static void bcma_hcd_usb20_ns_init_hc(struct bcma_device *dev)
243{
244 u32 val;
245
246
247 val = bcma_read32(dev, 0x94);
248 val &= 0xffff;
249 val |= 0x80 << 16;
250 bcma_write32(dev, 0x94, val);
251
252
253 val = bcma_read32(dev, 0x9c);
254 val |= 1;
255 bcma_write32(dev, 0x9c, val);
256
257
258
259
260
261
262 usleep_range(1000, 2000);
263}
264
265
266
267
268static int bcma_hcd_usb20_ns_init(struct bcma_hcd_device *bcma_hcd)
269{
270 struct bcma_device *core = bcma_hcd->core;
271 struct bcma_chipinfo *ci = &core->bus->chipinfo;
272 struct device *dev = &core->dev;
273
274 bcma_core_enable(core, 0);
275
276 if (ci->id == BCMA_CHIP_ID_BCM4707 ||
277 ci->id == BCMA_CHIP_ID_BCM53018)
278 bcma_hcd_usb20_ns_init_hc(core);
279
280 of_platform_default_populate(dev->of_node, NULL, dev);
281
282 return 0;
283}
284
285static void bcma_hci_platform_power_gpio(struct bcma_device *dev, bool val)
286{
287 struct bcma_hcd_device *usb_dev = bcma_get_drvdata(dev);
288
289 if (IS_ERR_OR_NULL(usb_dev->gpio_desc))
290 return;
291
292 gpiod_set_value(usb_dev->gpio_desc, val);
293}
294
295static const struct usb_ehci_pdata ehci_pdata = {
296};
297
298static const struct usb_ohci_pdata ohci_pdata = {
299};
300
301static struct platform_device *bcma_hcd_create_pdev(struct bcma_device *dev,
302 const char *name, u32 addr,
303 const void *data,
304 size_t size)
305{
306 struct platform_device *hci_dev;
307 struct resource hci_res[2];
308 int ret;
309
310 memset(hci_res, 0, sizeof(hci_res));
311
312 hci_res[0].start = addr;
313 hci_res[0].end = hci_res[0].start + 0x1000 - 1;
314 hci_res[0].flags = IORESOURCE_MEM;
315
316 hci_res[1].start = dev->irq;
317 hci_res[1].flags = IORESOURCE_IRQ;
318
319 hci_dev = platform_device_alloc(name, 0);
320 if (!hci_dev)
321 return ERR_PTR(-ENOMEM);
322
323 hci_dev->dev.parent = &dev->dev;
324 hci_dev->dev.dma_mask = &hci_dev->dev.coherent_dma_mask;
325
326 ret = platform_device_add_resources(hci_dev, hci_res,
327 ARRAY_SIZE(hci_res));
328 if (ret)
329 goto err_alloc;
330 if (data)
331 ret = platform_device_add_data(hci_dev, data, size);
332 if (ret)
333 goto err_alloc;
334 ret = platform_device_add(hci_dev);
335 if (ret)
336 goto err_alloc;
337
338 return hci_dev;
339
340err_alloc:
341 platform_device_put(hci_dev);
342 return ERR_PTR(ret);
343}
344
345static int bcma_hcd_usb20_init(struct bcma_hcd_device *usb_dev)
346{
347 struct bcma_device *dev = usb_dev->core;
348 struct bcma_chipinfo *chipinfo = &dev->bus->chipinfo;
349 u32 ohci_addr;
350 int err;
351
352 if (dma_set_mask_and_coherent(dev->dma_dev, DMA_BIT_MASK(32)))
353 return -EOPNOTSUPP;
354
355 bcma_hcd_init_chip_mips(dev);
356
357
358 ohci_addr = dev->addr_s[0];
359 if ((chipinfo->id == BCMA_CHIP_ID_BCM5357 ||
360 chipinfo->id == BCMA_CHIP_ID_BCM4749)
361 && chipinfo->rev == 0)
362 ohci_addr = 0x18009000;
363
364 usb_dev->ohci_dev = bcma_hcd_create_pdev(dev, "ohci-platform",
365 ohci_addr, &ohci_pdata,
366 sizeof(ohci_pdata));
367 if (IS_ERR(usb_dev->ohci_dev))
368 return PTR_ERR(usb_dev->ohci_dev);
369
370 usb_dev->ehci_dev = bcma_hcd_create_pdev(dev, "ehci-platform",
371 dev->addr, &ehci_pdata,
372 sizeof(ehci_pdata));
373 if (IS_ERR(usb_dev->ehci_dev)) {
374 err = PTR_ERR(usb_dev->ehci_dev);
375 goto err_unregister_ohci_dev;
376 }
377
378 return 0;
379
380err_unregister_ohci_dev:
381 platform_device_unregister(usb_dev->ohci_dev);
382 return err;
383}
384
385static int bcma_hcd_usb30_init(struct bcma_hcd_device *bcma_hcd)
386{
387 struct bcma_device *core = bcma_hcd->core;
388 struct device *dev = &core->dev;
389
390 bcma_core_enable(core, 0);
391
392 of_platform_default_populate(dev->of_node, NULL, dev);
393
394 return 0;
395}
396
397static int bcma_hcd_probe(struct bcma_device *core)
398{
399 int err;
400 struct bcma_hcd_device *usb_dev;
401
402
403
404 usb_dev = devm_kzalloc(&core->dev, sizeof(struct bcma_hcd_device),
405 GFP_KERNEL);
406 if (!usb_dev)
407 return -ENOMEM;
408 usb_dev->core = core;
409
410 if (core->dev.of_node)
411 usb_dev->gpio_desc = devm_gpiod_get(&core->dev, "vcc",
412 GPIOD_OUT_HIGH);
413
414 switch (core->id.id) {
415 case BCMA_CORE_USB20_HOST:
416 if (IS_ENABLED(CONFIG_ARM))
417 err = bcma_hcd_usb20_old_arm_init(usb_dev);
418 else if (IS_ENABLED(CONFIG_MIPS))
419 err = bcma_hcd_usb20_init(usb_dev);
420 else
421 err = -ENOTSUPP;
422 break;
423 case BCMA_CORE_NS_USB20:
424 err = bcma_hcd_usb20_ns_init(usb_dev);
425 break;
426 case BCMA_CORE_NS_USB30:
427 err = bcma_hcd_usb30_init(usb_dev);
428 break;
429 default:
430 return -ENODEV;
431 }
432 if (err)
433 return err;
434
435 bcma_set_drvdata(core, usb_dev);
436 return 0;
437}
438
439static void bcma_hcd_remove(struct bcma_device *dev)
440{
441 struct bcma_hcd_device *usb_dev = bcma_get_drvdata(dev);
442 struct platform_device *ohci_dev = usb_dev->ohci_dev;
443 struct platform_device *ehci_dev = usb_dev->ehci_dev;
444
445 if (ohci_dev)
446 platform_device_unregister(ohci_dev);
447 if (ehci_dev)
448 platform_device_unregister(ehci_dev);
449
450 bcma_core_disable(dev, 0);
451}
452
453static void bcma_hcd_shutdown(struct bcma_device *dev)
454{
455 bcma_hci_platform_power_gpio(dev, false);
456 bcma_core_disable(dev, 0);
457}
458
459#ifdef CONFIG_PM
460
461static int bcma_hcd_suspend(struct bcma_device *dev)
462{
463 bcma_hci_platform_power_gpio(dev, false);
464 bcma_core_disable(dev, 0);
465
466 return 0;
467}
468
469static int bcma_hcd_resume(struct bcma_device *dev)
470{
471 bcma_hci_platform_power_gpio(dev, true);
472 bcma_core_enable(dev, 0);
473
474 return 0;
475}
476
477#else
478#define bcma_hcd_suspend NULL
479#define bcma_hcd_resume NULL
480#endif
481
482static const struct bcma_device_id bcma_hcd_table[] = {
483 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_USB20_HOST, BCMA_ANY_REV, BCMA_ANY_CLASS),
484 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_NS_USB20, BCMA_ANY_REV, BCMA_ANY_CLASS),
485 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_NS_USB30, BCMA_ANY_REV, BCMA_ANY_CLASS),
486 {},
487};
488MODULE_DEVICE_TABLE(bcma, bcma_hcd_table);
489
490static struct bcma_driver bcma_hcd_driver = {
491 .name = KBUILD_MODNAME,
492 .id_table = bcma_hcd_table,
493 .probe = bcma_hcd_probe,
494 .remove = bcma_hcd_remove,
495 .shutdown = bcma_hcd_shutdown,
496 .suspend = bcma_hcd_suspend,
497 .resume = bcma_hcd_resume,
498};
499
500static int __init bcma_hcd_init(void)
501{
502 return bcma_driver_register(&bcma_hcd_driver);
503}
504module_init(bcma_hcd_init);
505
506static void __exit bcma_hcd_exit(void)
507{
508 bcma_driver_unregister(&bcma_hcd_driver);
509}
510module_exit(bcma_hcd_exit);
511
