2 * Broadcom specific Advanced Microcontroller Bus
3 * Broadcom USB-core driver (BCMA bus glue)
5 * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
7 * Based on ssb-ohci driver
8 * Copyright 2007 Michael Buesch <m@bues.ch>
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
16 * Derived from the USBcore related parts of Broadcom-SB
17 * Copyright 2005-2011 Broadcom Corporation
19 * Licensed under the GNU/GPL. See COPYING for details.
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>
29 MODULE_AUTHOR("Hauke Mehrtens");
30 MODULE_DESCRIPTION("Common USB driver for BCMA Bus");
31 MODULE_LICENSE("GPL");
33 struct bcma_hcd_device
{
34 struct platform_device
*ehci_dev
;
35 struct platform_device
*ohci_dev
;
38 /* Wait for bitmask in a register to get set or cleared.
39 * timeout is in units of ten-microseconds.
41 static int bcma_wait_bits(struct bcma_device
*dev
, u16 reg
, u32 bitmask
,
47 for (i
= 0; i
< timeout
; i
++) {
48 val
= bcma_read32(dev
, reg
);
49 if ((val
& bitmask
) == bitmask
)
57 static void __devinit
bcma_hcd_4716wa(struct bcma_device
*dev
)
59 #ifdef CONFIG_BCMA_DRIVER_MIPS
60 /* Work around for 4716 failures. */
61 if (dev
->bus
->chipinfo
.id
== 0x4716) {
64 tmp
= bcma_cpu_clock(&dev
->bus
->drv_mips
);
66 tmp
= 0x1846b; /* set CDR to 0x11(fast) */
67 else if (tmp
== 453000000)
68 tmp
= 0x1046b; /* set CDR to 0x10(slow) */
72 /* Change Shim mdio control reg to fix host not acking at
76 bcma_write32(dev
, 0x524, 0x1); /* write sel to enable */
79 bcma_write32(dev
, 0x524, tmp
);
81 bcma_write32(dev
, 0x524, 0x4ab);
83 bcma_read32(dev
, 0x528);
84 bcma_write32(dev
, 0x528, 0x80000000);
87 #endif /* CONFIG_BCMA_DRIVER_MIPS */
90 /* based on arch/mips/brcm-boards/bcm947xx/pcibios.c */
91 static void __devinit
bcma_hcd_init_chip(struct bcma_device
*dev
)
96 * USB 2.0 special considerations:
98 * 1. Since the core supports both OHCI and EHCI functions, it must
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.
105 if (!bcma_core_is_enabled(dev
)) {
106 bcma_core_enable(dev
, 0);
108 if (dev
->id
.rev
>= 5) {
109 /* Enable Misc PLL */
110 tmp
= bcma_read32(dev
, 0x1e0);
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");
116 /* Take out of resets */
117 bcma_write32(dev
, 0x200, 0x4ff);
119 bcma_write32(dev
, 0x200, 0x6ff);
122 /* Make sure digital and AFE are locked in USB PHY */
123 bcma_write32(dev
, 0x524, 0x6b);
125 tmp
= bcma_read32(dev
, 0x524);
127 bcma_write32(dev
, 0x524, 0xab);
129 tmp
= bcma_read32(dev
, 0x524);
131 bcma_write32(dev
, 0x524, 0x2b);
133 tmp
= bcma_read32(dev
, 0x524);
135 bcma_write32(dev
, 0x524, 0x10ab);
137 tmp
= bcma_read32(dev
, 0x524);
139 if (bcma_wait_bits(dev
, 0x528, 0xc000, 10000)) {
140 tmp
= bcma_read32(dev
, 0x528);
142 "USB20H mdio_rddata 0x%08x\n", tmp
);
144 bcma_write32(dev
, 0x528, 0x80000000);
145 tmp
= bcma_read32(dev
, 0x314);
147 bcma_write32(dev
, 0x200, 0x7ff);
150 /* Take USB and HSIC out of non-driving modes */
151 bcma_write32(dev
, 0x510, 0);
153 bcma_write32(dev
, 0x200, 0x7ff);
158 bcma_hcd_4716wa(dev
);
162 static const struct usb_ehci_pdata ehci_pdata
= {
165 static const struct usb_ohci_pdata ohci_pdata
= {
168 static struct platform_device
* __devinit
169 bcma_hcd_create_pdev(struct bcma_device
*dev
, bool ohci
, u32 addr
)
171 struct platform_device
*hci_dev
;
172 struct resource hci_res
[2];
175 memset(hci_res
, 0, sizeof(hci_res
));
177 hci_res
[0].start
= addr
;
178 hci_res
[0].end
= hci_res
[0].start
+ 0x1000 - 1;
179 hci_res
[0].flags
= IORESOURCE_MEM
;
181 hci_res
[1].start
= dev
->irq
;
182 hci_res
[1].flags
= IORESOURCE_IRQ
;
184 hci_dev
= platform_device_alloc(ohci
? "ohci-platform" :
185 "ehci-platform" , 0);
189 hci_dev
->dev
.parent
= &dev
->dev
;
190 hci_dev
->dev
.dma_mask
= &hci_dev
->dev
.coherent_dma_mask
;
192 ret
= platform_device_add_resources(hci_dev
, hci_res
,
193 ARRAY_SIZE(hci_res
));
197 ret
= platform_device_add_data(hci_dev
, &ohci_pdata
,
200 ret
= platform_device_add_data(hci_dev
, &ehci_pdata
,
204 ret
= platform_device_add(hci_dev
);
211 platform_device_put(hci_dev
);
215 static int __devinit
bcma_hcd_probe(struct bcma_device
*dev
)
220 struct bcma_hcd_device
*usb_dev
;
221 struct bcma_chipinfo
*chipinfo
;
223 chipinfo
= &dev
->bus
->chipinfo
;
224 /* USBcores are only connected on embedded devices. */
225 chipid_top
= (chipinfo
->id
& 0xFF00);
226 if (chipid_top
!= 0x4700 && chipid_top
!= 0x5300)
229 /* TODO: Probably need checks here; is the core connected? */
231 if (dma_set_mask(dev
->dma_dev
, DMA_BIT_MASK(32)) ||
232 dma_set_coherent_mask(dev
->dma_dev
, DMA_BIT_MASK(32)))
235 usb_dev
= kzalloc(sizeof(struct bcma_hcd_device
), GFP_KERNEL
);
239 bcma_hcd_init_chip(dev
);
241 /* In AI chips EHCI is addrspace 0, OHCI is 1 */
242 ohci_addr
= dev
->addr1
;
243 if ((chipinfo
->id
== 0x5357 || chipinfo
->id
== 0x4749)
244 && chipinfo
->rev
== 0)
245 ohci_addr
= 0x18009000;
247 usb_dev
->ohci_dev
= bcma_hcd_create_pdev(dev
, true, ohci_addr
);
248 if (IS_ERR(usb_dev
->ohci_dev
)) {
249 err
= PTR_ERR(usb_dev
->ohci_dev
);
250 goto err_free_usb_dev
;
253 usb_dev
->ehci_dev
= bcma_hcd_create_pdev(dev
, false, dev
->addr
);
254 if (IS_ERR(usb_dev
->ehci_dev
)) {
255 err
= PTR_ERR(usb_dev
->ehci_dev
);
256 goto err_unregister_ohci_dev
;
259 bcma_set_drvdata(dev
, usb_dev
);
262 err_unregister_ohci_dev
:
263 platform_device_unregister(usb_dev
->ohci_dev
);
269 static void __devexit
bcma_hcd_remove(struct bcma_device
*dev
)
271 struct bcma_hcd_device
*usb_dev
= bcma_get_drvdata(dev
);
272 struct platform_device
*ohci_dev
= usb_dev
->ohci_dev
;
273 struct platform_device
*ehci_dev
= usb_dev
->ehci_dev
;
276 platform_device_unregister(ohci_dev
);
278 platform_device_unregister(ehci_dev
);
280 bcma_core_disable(dev
, 0);
283 static void bcma_hcd_shutdown(struct bcma_device
*dev
)
285 bcma_core_disable(dev
, 0);
290 static int bcma_hcd_suspend(struct bcma_device
*dev
)
292 bcma_core_disable(dev
, 0);
297 static int bcma_hcd_resume(struct bcma_device
*dev
)
299 bcma_core_enable(dev
, 0);
304 #else /* !CONFIG_PM */
305 #define bcma_hcd_suspend NULL
306 #define bcma_hcd_resume NULL
307 #endif /* CONFIG_PM */
309 static const struct bcma_device_id bcma_hcd_table
[] __devinitconst
= {
310 BCMA_CORE(BCMA_MANUF_BCM
, BCMA_CORE_USB20_HOST
, BCMA_ANY_REV
, BCMA_ANY_CLASS
),
313 MODULE_DEVICE_TABLE(bcma
, bcma_hcd_table
);
315 static struct bcma_driver bcma_hcd_driver
= {
316 .name
= KBUILD_MODNAME
,
317 .id_table
= bcma_hcd_table
,
318 .probe
= bcma_hcd_probe
,
319 .remove
= __devexit_p(bcma_hcd_remove
),
320 .shutdown
= bcma_hcd_shutdown
,
321 .suspend
= bcma_hcd_suspend
,
322 .resume
= bcma_hcd_resume
,
325 static int __init
bcma_hcd_init(void)
327 return bcma_driver_register(&bcma_hcd_driver
);
329 module_init(bcma_hcd_init
);
331 static void __exit
bcma_hcd_exit(void)
333 bcma_driver_unregister(&bcma_hcd_driver
);
335 module_exit(bcma_hcd_exit
);