xhci: tegra: support HSIC ports
[linux-3.10.git] / drivers / usb / host / bcma-hcd.c
1 /*
2  * Broadcom specific Advanced Microcontroller Bus
3  * Broadcom USB-core driver (BCMA bus glue)
4  *
5  * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
6  *
7  * Based on ssb-ohci driver
8  * Copyright 2007 Michael Buesch <m@bues.ch>
9  *
10  * Derived from the OHCI-PCI driver
11  * Copyright 1999 Roman Weissgaerber
12  * Copyright 2000-2002 David Brownell
13  * Copyright 1999 Linus Torvalds
14  * Copyright 1999 Gregory P. Smith
15  *
16  * Derived from the USBcore related parts of Broadcom-SB
17  * Copyright 2005-2011 Broadcom Corporation
18  *
19  * Licensed under the GNU/GPL. See COPYING for details.
20  */
21 #include <linux/bcma/bcma.h>
22 #include <linux/delay.h>
23 #include <linux/platform_device.h>
24 #include <linux/module.h>
25 #include <linux/slab.h>
26 #include <linux/usb/ehci_pdriver.h>
27 #include <linux/usb/ohci_pdriver.h>
28
29 MODULE_AUTHOR("Hauke Mehrtens");
30 MODULE_DESCRIPTION("Common USB driver for BCMA Bus");
31 MODULE_LICENSE("GPL");
32
33 struct bcma_hcd_device {
34         struct platform_device *ehci_dev;
35         struct platform_device *ohci_dev;
36 };
37
38 /* Wait for bitmask in a register to get set or cleared.
39  * timeout is in units of ten-microseconds.
40  */
41 static int bcma_wait_bits(struct bcma_device *dev, u16 reg, u32 bitmask,
42                           int timeout)
43 {
44         int i;
45         u32 val;
46
47         for (i = 0; i < timeout; i++) {
48                 val = bcma_read32(dev, reg);
49                 if ((val & bitmask) == bitmask)
50                         return 0;
51                 udelay(10);
52         }
53
54         return -ETIMEDOUT;
55 }
56
57 static void bcma_hcd_4716wa(struct bcma_device *dev)
58 {
59 #ifdef CONFIG_BCMA_DRIVER_MIPS
60         /* Work around for 4716 failures. */
61         if (dev->bus->chipinfo.id == 0x4716) {
62                 u32 tmp;
63
64                 tmp = bcma_cpu_clock(&dev->bus->drv_mips);
65                 if (tmp >= 480000000)
66                         tmp = 0x1846b; /* set CDR to 0x11(fast) */
67                 else if (tmp == 453000000)
68                         tmp = 0x1046b; /* set CDR to 0x10(slow) */
69                 else
70                         tmp = 0;
71
72                 /* Change Shim mdio control reg to fix host not acking at
73                  * high frequencies
74                  */
75                 if (tmp) {
76                         bcma_write32(dev, 0x524, 0x1); /* write sel to enable */
77                         udelay(500);
78
79                         bcma_write32(dev, 0x524, tmp);
80                         udelay(500);
81                         bcma_write32(dev, 0x524, 0x4ab);
82                         udelay(500);
83                         bcma_read32(dev, 0x528);
84                         bcma_write32(dev, 0x528, 0x80000000);
85                 }
86         }
87 #endif /* CONFIG_BCMA_DRIVER_MIPS */
88 }
89
90 /* based on arch/mips/brcm-boards/bcm947xx/pcibios.c */
91 static void bcma_hcd_init_chip(struct bcma_device *dev)
92 {
93         u32 tmp;
94
95         /*
96          * USB 2.0 special considerations:
97          *
98          * 1. Since the core supports both OHCI and EHCI functions, it must
99          *    only be reset once.
100          *
101          * 2. In addition to the standard SI reset sequence, the Host Control
102          *    Register must be programmed to bring the USB core and various
103          *    phy components out of reset.
104          */
105         if (!bcma_core_is_enabled(dev)) {
106                 bcma_core_enable(dev, 0);
107                 mdelay(10);
108                 if (dev->id.rev >= 5) {
109                         /* Enable Misc PLL */
110                         tmp = bcma_read32(dev, 0x1e0);
111                         tmp |= 0x100;
112                         bcma_write32(dev, 0x1e0, tmp);
113                         if (bcma_wait_bits(dev, 0x1e0, 1 << 24, 100))
114                                 printk(KERN_EMERG "Failed to enable misc PPL!\n");
115
116                         /* Take out of resets */
117                         bcma_write32(dev, 0x200, 0x4ff);
118                         udelay(25);
119                         bcma_write32(dev, 0x200, 0x6ff);
120                         udelay(25);
121
122                         /* Make sure digital and AFE are locked in USB PHY */
123                         bcma_write32(dev, 0x524, 0x6b);
124                         udelay(50);
125                         tmp = bcma_read32(dev, 0x524);
126                         udelay(50);
127                         bcma_write32(dev, 0x524, 0xab);
128                         udelay(50);
129                         tmp = bcma_read32(dev, 0x524);
130                         udelay(50);
131                         bcma_write32(dev, 0x524, 0x2b);
132                         udelay(50);
133                         tmp = bcma_read32(dev, 0x524);
134                         udelay(50);
135                         bcma_write32(dev, 0x524, 0x10ab);
136                         udelay(50);
137                         tmp = bcma_read32(dev, 0x524);
138
139                         if (bcma_wait_bits(dev, 0x528, 0xc000, 10000)) {
140                                 tmp = bcma_read32(dev, 0x528);
141                                 printk(KERN_EMERG
142                                        "USB20H mdio_rddata 0x%08x\n", tmp);
143                         }
144                         bcma_write32(dev, 0x528, 0x80000000);
145                         tmp = bcma_read32(dev, 0x314);
146                         udelay(265);
147                         bcma_write32(dev, 0x200, 0x7ff);
148                         udelay(10);
149
150                         /* Take USB and HSIC out of non-driving modes */
151                         bcma_write32(dev, 0x510, 0);
152                 } else {
153                         bcma_write32(dev, 0x200, 0x7ff);
154
155                         udelay(1);
156                 }
157
158                 bcma_hcd_4716wa(dev);
159         }
160 }
161
162 static const struct usb_ehci_pdata ehci_pdata = {
163 };
164
165 static const struct usb_ohci_pdata ohci_pdata = {
166 };
167
168 static struct platform_device *bcma_hcd_create_pdev(struct bcma_device *dev, bool ohci, u32 addr)
169 {
170         struct platform_device *hci_dev;
171         struct resource hci_res[2];
172         int ret = -ENOMEM;
173
174         memset(hci_res, 0, sizeof(hci_res));
175
176         hci_res[0].start = addr;
177         hci_res[0].end = hci_res[0].start + 0x1000 - 1;
178         hci_res[0].flags = IORESOURCE_MEM;
179
180         hci_res[1].start = dev->irq;
181         hci_res[1].flags = IORESOURCE_IRQ;
182
183         hci_dev = platform_device_alloc(ohci ? "ohci-platform" :
184                                         "ehci-platform" , 0);
185         if (!hci_dev)
186                 return NULL;
187
188         hci_dev->dev.parent = &dev->dev;
189         hci_dev->dev.dma_mask = &hci_dev->dev.coherent_dma_mask;
190
191         ret = platform_device_add_resources(hci_dev, hci_res,
192                                             ARRAY_SIZE(hci_res));
193         if (ret)
194                 goto err_alloc;
195         if (ohci)
196                 ret = platform_device_add_data(hci_dev, &ohci_pdata,
197                                                sizeof(ohci_pdata));
198         else
199                 ret = platform_device_add_data(hci_dev, &ehci_pdata,
200                                                sizeof(ehci_pdata));
201         if (ret)
202                 goto err_alloc;
203         ret = platform_device_add(hci_dev);
204         if (ret)
205                 goto err_alloc;
206
207         return hci_dev;
208
209 err_alloc:
210         platform_device_put(hci_dev);
211         return ERR_PTR(ret);
212 }
213
214 static int bcma_hcd_probe(struct bcma_device *dev)
215 {
216         int err;
217         u16 chipid_top;
218         u32 ohci_addr;
219         struct bcma_hcd_device *usb_dev;
220         struct bcma_chipinfo *chipinfo;
221
222         chipinfo = &dev->bus->chipinfo;
223         /* USBcores are only connected on embedded devices. */
224         chipid_top = (chipinfo->id & 0xFF00);
225         if (chipid_top != 0x4700 && chipid_top != 0x5300)
226                 return -ENODEV;
227
228         /* TODO: Probably need checks here; is the core connected? */
229
230         if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) ||
231             dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
232                 return -EOPNOTSUPP;
233
234         usb_dev = kzalloc(sizeof(struct bcma_hcd_device), GFP_KERNEL);
235         if (!usb_dev)
236                 return -ENOMEM;
237
238         bcma_hcd_init_chip(dev);
239
240         /* In AI chips EHCI is addrspace 0, OHCI is 1 */
241         ohci_addr = dev->addr1;
242         if ((chipinfo->id == 0x5357 || chipinfo->id == 0x4749)
243             && chipinfo->rev == 0)
244                 ohci_addr = 0x18009000;
245
246         usb_dev->ohci_dev = bcma_hcd_create_pdev(dev, true, ohci_addr);
247         if (IS_ERR(usb_dev->ohci_dev)) {
248                 err = PTR_ERR(usb_dev->ohci_dev);
249                 goto err_free_usb_dev;
250         }
251
252         usb_dev->ehci_dev = bcma_hcd_create_pdev(dev, false, dev->addr);
253         if (IS_ERR(usb_dev->ehci_dev)) {
254                 err = PTR_ERR(usb_dev->ehci_dev);
255                 goto err_unregister_ohci_dev;
256         }
257
258         bcma_set_drvdata(dev, usb_dev);
259         return 0;
260
261 err_unregister_ohci_dev:
262         platform_device_unregister(usb_dev->ohci_dev);
263 err_free_usb_dev:
264         kfree(usb_dev);
265         return err;
266 }
267
268 static void bcma_hcd_remove(struct bcma_device *dev)
269 {
270         struct bcma_hcd_device *usb_dev = bcma_get_drvdata(dev);
271         struct platform_device *ohci_dev = usb_dev->ohci_dev;
272         struct platform_device *ehci_dev = usb_dev->ehci_dev;
273
274         if (ohci_dev)
275                 platform_device_unregister(ohci_dev);
276         if (ehci_dev)
277                 platform_device_unregister(ehci_dev);
278
279         bcma_core_disable(dev, 0);
280 }
281
282 static void bcma_hcd_shutdown(struct bcma_device *dev)
283 {
284         bcma_core_disable(dev, 0);
285 }
286
287 #ifdef CONFIG_PM
288
289 static int bcma_hcd_suspend(struct bcma_device *dev)
290 {
291         bcma_core_disable(dev, 0);
292
293         return 0;
294 }
295
296 static int bcma_hcd_resume(struct bcma_device *dev)
297 {
298         bcma_core_enable(dev, 0);
299
300         return 0;
301 }
302
303 #else /* !CONFIG_PM */
304 #define bcma_hcd_suspend        NULL
305 #define bcma_hcd_resume NULL
306 #endif /* CONFIG_PM */
307
308 static const struct bcma_device_id bcma_hcd_table[] = {
309         BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_USB20_HOST, BCMA_ANY_REV, BCMA_ANY_CLASS),
310         BCMA_CORETABLE_END
311 };
312 MODULE_DEVICE_TABLE(bcma, bcma_hcd_table);
313
314 static struct bcma_driver bcma_hcd_driver = {
315         .name           = KBUILD_MODNAME,
316         .id_table       = bcma_hcd_table,
317         .probe          = bcma_hcd_probe,
318         .remove         = bcma_hcd_remove,
319         .shutdown       = bcma_hcd_shutdown,
320         .suspend        = bcma_hcd_suspend,
321         .resume         = bcma_hcd_resume,
322 };
323
324 static int __init bcma_hcd_init(void)
325 {
326         return bcma_driver_register(&bcma_hcd_driver);
327 }
328 module_init(bcma_hcd_init);
329
330 static void __exit bcma_hcd_exit(void)
331 {
332         bcma_driver_unregister(&bcma_hcd_driver);
333 }
334 module_exit(bcma_hcd_exit);