1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
|
/*
* Broadcom specific Advanced Microcontroller Bus
* Broadcom USB-core driver (BCMA bus glue)
*
* Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
*
* Based on ssb-ohci driver
* Copyright 2007 Michael Buesch <m@bues.ch>
*
* Derived from the OHCI-PCI driver
* Copyright 1999 Roman Weissgaerber
* Copyright 2000-2002 David Brownell
* Copyright 1999 Linus Torvalds
* Copyright 1999 Gregory P. Smith
*
* Derived from the USBcore related parts of Broadcom-SB
* Copyright 2005-2011 Broadcom Corporation
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include <linux/bcma/bcma.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb/ehci_pdriver.h>
#include <linux/usb/ohci_pdriver.h>
MODULE_AUTHOR("Hauke Mehrtens");
MODULE_DESCRIPTION("Common USB driver for BCMA Bus");
MODULE_LICENSE("GPL");
struct bcma_hcd_device {
struct platform_device *ehci_dev;
struct platform_device *ohci_dev;
};
/* Wait for bitmask in a register to get set or cleared.
* timeout is in units of ten-microseconds.
*/
static int bcma_wait_bits(struct bcma_device *dev, u16 reg, u32 bitmask,
int timeout)
{
int i;
u32 val;
for (i = 0; i < timeout; i++) {
val = bcma_read32(dev, reg);
if ((val & bitmask) == bitmask)
return 0;
udelay(10);
}
return -ETIMEDOUT;
}
static void bcma_hcd_4716wa(struct bcma_device *dev)
{
#ifdef CONFIG_BCMA_DRIVER_MIPS
/* Work around for 4716 failures. */
if (dev->bus->chipinfo.id == 0x4716) {
u32 tmp;
tmp = bcma_cpu_clock(&dev->bus->drv_mips);
if (tmp >= 480000000)
tmp = 0x1846b; /* set CDR to 0x11(fast) */
else if (tmp == 453000000)
tmp = 0x1046b; /* set CDR to 0x10(slow) */
else
tmp = 0;
/* Change Shim mdio control reg to fix host not acking at
* high frequencies
*/
if (tmp) {
bcma_write32(dev, 0x524, 0x1); /* write sel to enable */
udelay(500);
bcma_write32(dev, 0x524, tmp);
udelay(500);
bcma_write32(dev, 0x524, 0x4ab);
udelay(500);
bcma_read32(dev, 0x528);
bcma_write32(dev, 0x528, 0x80000000);
}
}
#endif /* CONFIG_BCMA_DRIVER_MIPS */
}
/* based on arch/mips/brcm-boards/bcm947xx/pcibios.c */
static void bcma_hcd_init_chip(struct bcma_device *dev)
{
u32 tmp;
/*
* USB 2.0 special considerations:
*
* 1. Since the core supports both OHCI and EHCI functions, it must
* only be reset once.
*
* 2. In addition to the standard SI reset sequence, the Host Control
* Register must be programmed to bring the USB core and various
* phy components out of reset.
*/
if (!bcma_core_is_enabled(dev)) {
bcma_core_enable(dev, 0);
mdelay(10);
if (dev->id.rev >= 5) {
/* Enable Misc PLL */
tmp = bcma_read32(dev, 0x1e0);
tmp |= 0x100;
bcma_write32(dev, 0x1e0, tmp);
if (bcma_wait_bits(dev, 0x1e0, 1 << 24, 100))
printk(KERN_EMERG "Failed to enable misc PPL!\n");
/* Take out of resets */
bcma_write32(dev, 0x200, 0x4ff);
udelay(25);
bcma_write32(dev, 0x200, 0x6ff);
udelay(25);
/* Make sure digital and AFE are locked in USB PHY */
bcma_write32(dev, 0x524, 0x6b);
udelay(50);
tmp = bcma_read32(dev, 0x524);
udelay(50);
bcma_write32(dev, 0x524, 0xab);
udelay(50);
tmp = bcma_read32(dev, 0x524);
udelay(50);
bcma_write32(dev, 0x524, 0x2b);
udelay(50);
tmp = bcma_read32(dev, 0x524);
udelay(50);
bcma_write32(dev, 0x524, 0x10ab);
udelay(50);
tmp = bcma_read32(dev, 0x524);
if (bcma_wait_bits(dev, 0x528, 0xc000, 10000)) {
tmp = bcma_read32(dev, 0x528);
printk(KERN_EMERG
"USB20H mdio_rddata 0x%08x\n", tmp);
}
bcma_write32(dev, 0x528, 0x80000000);
tmp = bcma_read32(dev, 0x314);
udelay(265);
bcma_write32(dev, 0x200, 0x7ff);
udelay(10);
/* Take USB and HSIC out of non-driving modes */
bcma_write32(dev, 0x510, 0);
} else {
bcma_write32(dev, 0x200, 0x7ff);
udelay(1);
}
bcma_hcd_4716wa(dev);
}
}
static const struct usb_ehci_pdata ehci_pdata = {
};
static const struct usb_ohci_pdata ohci_pdata = {
};
static struct platform_device *bcma_hcd_create_pdev(struct bcma_device *dev, bool ohci, u32 addr)
{
struct platform_device *hci_dev;
struct resource hci_res[2];
int ret = -ENOMEM;
memset(hci_res, 0, sizeof(hci_res));
hci_res[0].start = addr;
hci_res[0].end = hci_res[0].start + 0x1000 - 1;
hci_res[0].flags = IORESOURCE_MEM;
hci_res[1].start = dev->irq;
hci_res[1].flags = IORESOURCE_IRQ;
hci_dev = platform_device_alloc(ohci ? "ohci-platform" :
"ehci-platform" , 0);
if (!hci_dev)
return NULL;
hci_dev->dev.parent = &dev->dev;
hci_dev->dev.dma_mask = &hci_dev->dev.coherent_dma_mask;
ret = platform_device_add_resources(hci_dev, hci_res,
ARRAY_SIZE(hci_res));
if (ret)
goto err_alloc;
if (ohci)
ret = platform_device_add_data(hci_dev, &ohci_pdata,
sizeof(ohci_pdata));
else
ret = platform_device_add_data(hci_dev, &ehci_pdata,
sizeof(ehci_pdata));
if (ret)
goto err_alloc;
ret = platform_device_add(hci_dev);
if (ret)
goto err_alloc;
return hci_dev;
err_alloc:
platform_device_put(hci_dev);
return ERR_PTR(ret);
}
static int bcma_hcd_probe(struct bcma_device *dev)
{
int err;
u16 chipid_top;
u32 ohci_addr;
struct bcma_hcd_device *usb_dev;
struct bcma_chipinfo *chipinfo;
chipinfo = &dev->bus->chipinfo;
/* USBcores are only connected on embedded devices. */
chipid_top = (chipinfo->id & 0xFF00);
if (chipid_top != 0x4700 && chipid_top != 0x5300)
return -ENODEV;
/* TODO: Probably need checks here; is the core connected? */
if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) ||
dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
return -EOPNOTSUPP;
usb_dev = kzalloc(sizeof(struct bcma_hcd_device), GFP_KERNEL);
if (!usb_dev)
return -ENOMEM;
bcma_hcd_init_chip(dev);
/* In AI chips EHCI is addrspace 0, OHCI is 1 */
ohci_addr = dev->addr1;
if ((chipinfo->id == 0x5357 || chipinfo->id == 0x4749)
&& chipinfo->rev == 0)
ohci_addr = 0x18009000;
usb_dev->ohci_dev = bcma_hcd_create_pdev(dev, true, ohci_addr);
if (IS_ERR(usb_dev->ohci_dev)) {
err = PTR_ERR(usb_dev->ohci_dev);
goto err_free_usb_dev;
}
usb_dev->ehci_dev = bcma_hcd_create_pdev(dev, false, dev->addr);
if (IS_ERR(usb_dev->ehci_dev)) {
err = PTR_ERR(usb_dev->ehci_dev);
goto err_unregister_ohci_dev;
}
bcma_set_drvdata(dev, usb_dev);
return 0;
err_unregister_ohci_dev:
platform_device_unregister(usb_dev->ohci_dev);
err_free_usb_dev:
kfree(usb_dev);
return err;
}
static void __devexit bcma_hcd_remove(struct bcma_device *dev)
{
struct bcma_hcd_device *usb_dev = bcma_get_drvdata(dev);
struct platform_device *ohci_dev = usb_dev->ohci_dev;
struct platform_device *ehci_dev = usb_dev->ehci_dev;
if (ohci_dev)
platform_device_unregister(ohci_dev);
if (ehci_dev)
platform_device_unregister(ehci_dev);
bcma_core_disable(dev, 0);
}
static void bcma_hcd_shutdown(struct bcma_device *dev)
{
bcma_core_disable(dev, 0);
}
#ifdef CONFIG_PM
static int bcma_hcd_suspend(struct bcma_device *dev)
{
bcma_core_disable(dev, 0);
return 0;
}
static int bcma_hcd_resume(struct bcma_device *dev)
{
bcma_core_enable(dev, 0);
return 0;
}
#else /* !CONFIG_PM */
#define bcma_hcd_suspend NULL
#define bcma_hcd_resume NULL
#endif /* CONFIG_PM */
static const struct bcma_device_id bcma_hcd_table[] = {
BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_USB20_HOST, BCMA_ANY_REV, BCMA_ANY_CLASS),
BCMA_CORETABLE_END
};
MODULE_DEVICE_TABLE(bcma, bcma_hcd_table);
static struct bcma_driver bcma_hcd_driver = {
.name = KBUILD_MODNAME,
.id_table = bcma_hcd_table,
.probe = bcma_hcd_probe,
.remove = bcma_hcd_remove,
.shutdown = bcma_hcd_shutdown,
.suspend = bcma_hcd_suspend,
.resume = bcma_hcd_resume,
};
static int __init bcma_hcd_init(void)
{
return bcma_driver_register(&bcma_hcd_driver);
}
module_init(bcma_hcd_init);
static void __exit bcma_hcd_exit(void)
{
bcma_driver_unregister(&bcma_hcd_driver);
}
module_exit(bcma_hcd_exit);
|
