2 * Broadcom specific Advanced Microcontroller Bus
3 * Broadcom USB-core driver (BCMA bus glue)
5 * Copyright 2011-2015 Hauke Mehrtens <hauke@hauke-m.de>
6 * Copyright 2015 Felix Fietkau <nbd@openwrt.org>
8 * Based on ssb-ohci driver
9 * Copyright 2007 Michael Buesch <m@bues.ch>
11 * Derived from the OHCI-PCI driver
12 * Copyright 1999 Roman Weissgaerber
13 * Copyright 2000-2002 David Brownell
14 * Copyright 1999 Linus Torvalds
15 * Copyright 1999 Gregory P. Smith
17 * Derived from the USBcore related parts of Broadcom-SB
18 * Copyright 2005-2011 Broadcom Corporation
20 * Licensed under the GNU/GPL. See COPYING for details.
22 #include <linux/bcma/bcma.h>
23 #include <linux/delay.h>
24 #include <linux/platform_device.h>
25 #include <linux/module.h>
26 #include <linux/slab.h>
28 #include <linux/of_gpio.h>
29 #include <linux/usb/ehci_pdriver.h>
30 #include <linux/usb/ohci_pdriver.h>
32 MODULE_AUTHOR("Hauke Mehrtens");
33 MODULE_DESCRIPTION("Common USB driver for BCMA Bus");
34 MODULE_LICENSE("GPL");
36 struct bcma_hcd_device
{
37 struct platform_device
*ehci_dev
;
38 struct platform_device
*ohci_dev
;
41 /* Wait for bitmask in a register to get set or cleared.
42 * timeout is in units of ten-microseconds.
44 static int bcma_wait_bits(struct bcma_device
*dev
, u16 reg
, u32 bitmask
,
50 for (i
= 0; i
< timeout
; i
++) {
51 val
= bcma_read32(dev
, reg
);
52 if ((val
& bitmask
) == bitmask
)
60 static void bcma_hcd_4716wa(struct bcma_device
*dev
)
62 #ifdef CONFIG_BCMA_DRIVER_MIPS
63 /* Work around for 4716 failures. */
64 if (dev
->bus
->chipinfo
.id
== 0x4716) {
67 tmp
= bcma_cpu_clock(&dev
->bus
->drv_mips
);
69 tmp
= 0x1846b; /* set CDR to 0x11(fast) */
70 else if (tmp
== 453000000)
71 tmp
= 0x1046b; /* set CDR to 0x10(slow) */
75 /* Change Shim mdio control reg to fix host not acking at
79 bcma_write32(dev
, 0x524, 0x1); /* write sel to enable */
82 bcma_write32(dev
, 0x524, tmp
);
84 bcma_write32(dev
, 0x524, 0x4ab);
86 bcma_read32(dev
, 0x528);
87 bcma_write32(dev
, 0x528, 0x80000000);
90 #endif /* CONFIG_BCMA_DRIVER_MIPS */
93 /* based on arch/mips/brcm-boards/bcm947xx/pcibios.c */
94 static void bcma_hcd_init_chip_mips(struct bcma_device
*dev
)
99 * USB 2.0 special considerations:
101 * 1. Since the core supports both OHCI and EHCI functions, it must
102 * only be reset once.
104 * 2. In addition to the standard SI reset sequence, the Host Control
105 * Register must be programmed to bring the USB core and various
106 * phy components out of reset.
108 if (!bcma_core_is_enabled(dev
)) {
109 bcma_core_enable(dev
, 0);
111 if (dev
->id
.rev
>= 5) {
112 /* Enable Misc PLL */
113 tmp
= bcma_read32(dev
, 0x1e0);
115 bcma_write32(dev
, 0x1e0, tmp
);
116 if (bcma_wait_bits(dev
, 0x1e0, 1 << 24, 100))
117 printk(KERN_EMERG
"Failed to enable misc PPL!\n");
119 /* Take out of resets */
120 bcma_write32(dev
, 0x200, 0x4ff);
122 bcma_write32(dev
, 0x200, 0x6ff);
125 /* Make sure digital and AFE are locked in USB PHY */
126 bcma_write32(dev
, 0x524, 0x6b);
128 tmp
= bcma_read32(dev
, 0x524);
130 bcma_write32(dev
, 0x524, 0xab);
132 tmp
= bcma_read32(dev
, 0x524);
134 bcma_write32(dev
, 0x524, 0x2b);
136 tmp
= bcma_read32(dev
, 0x524);
138 bcma_write32(dev
, 0x524, 0x10ab);
140 tmp
= bcma_read32(dev
, 0x524);
142 if (bcma_wait_bits(dev
, 0x528, 0xc000, 10000)) {
143 tmp
= bcma_read32(dev
, 0x528);
145 "USB20H mdio_rddata 0x%08x\n", tmp
);
147 bcma_write32(dev
, 0x528, 0x80000000);
148 tmp
= bcma_read32(dev
, 0x314);
150 bcma_write32(dev
, 0x200, 0x7ff);
153 /* Take USB and HSIC out of non-driving modes */
154 bcma_write32(dev
, 0x510, 0);
156 bcma_write32(dev
, 0x200, 0x7ff);
161 bcma_hcd_4716wa(dev
);
165 static void bcma_hcd_init_chip_arm_phy(struct bcma_device
*dev
)
167 struct bcma_device
*arm_core
;
170 arm_core
= bcma_find_core(dev
->bus
, BCMA_CORE_ARMCA9
);
172 dev_err(&dev
->dev
, "can not find ARM Cortex A9 ihost core\n");
176 dmu
= ioremap_nocache(arm_core
->addr_s
[0], 0x1000);
178 dev_err(&dev
->dev
, "can not map ARM Cortex A9 ihost core\n");
182 /* Unlock DMU PLL settings */
183 iowrite32(0x0000ea68, dmu
+ 0x180);
185 /* Write USB 2.0 PLL control setting */
186 iowrite32(0x00dd10c3, dmu
+ 0x164);
188 /* Lock DMU PLL settings */
189 iowrite32(0x00000000, dmu
+ 0x180);
194 static void bcma_hcd_init_chip_arm_hc(struct bcma_device
*dev
)
199 * Delay after PHY initialized to ensure HC is ready to be configured
201 usleep_range(1000, 2000);
203 /* Set packet buffer OUT threshold */
204 val
= bcma_read32(dev
, 0x94);
207 bcma_write32(dev
, 0x94, val
);
209 /* Enable break memory transfer */
210 val
= bcma_read32(dev
, 0x9c);
212 bcma_write32(dev
, 0x9c, val
);
215 static void bcma_hcd_init_chip_arm(struct bcma_device
*dev
)
217 bcma_core_enable(dev
, 0);
219 if (dev
->bus
->chipinfo
.id
== BCMA_CHIP_ID_BCM4707
||
220 dev
->bus
->chipinfo
.id
== BCMA_CHIP_ID_BCM53018
) {
221 if (dev
->bus
->chipinfo
.pkg
== BCMA_PKG_ID_BCM4707
||
222 dev
->bus
->chipinfo
.pkg
== BCMA_PKG_ID_BCM4708
)
223 bcma_hcd_init_chip_arm_phy(dev
);
225 bcma_hcd_init_chip_arm_hc(dev
);
229 static void bcma_hci_platform_power_gpio(struct bcma_device
*dev
, bool val
)
233 gpio
= of_get_named_gpio(dev
->dev
.of_node
, "vcc-gpio", 0);
234 if (!gpio_is_valid(gpio
))
238 gpio_request(gpio
, "bcma-hcd-gpio");
239 gpio_set_value(gpio
, 1);
241 gpio_set_value(gpio
, 0);
246 static const struct usb_ehci_pdata ehci_pdata
= {
249 static const struct usb_ohci_pdata ohci_pdata
= {
252 static struct platform_device
*bcma_hcd_create_pdev(struct bcma_device
*dev
, bool ohci
, u32 addr
)
254 struct platform_device
*hci_dev
;
255 struct resource hci_res
[2];
258 memset(hci_res
, 0, sizeof(hci_res
));
260 hci_res
[0].start
= addr
;
261 hci_res
[0].end
= hci_res
[0].start
+ 0x1000 - 1;
262 hci_res
[0].flags
= IORESOURCE_MEM
;
264 hci_res
[1].start
= dev
->irq
;
265 hci_res
[1].flags
= IORESOURCE_IRQ
;
267 hci_dev
= platform_device_alloc(ohci
? "ohci-platform" :
268 "ehci-platform" , 0);
270 return ERR_PTR(-ENOMEM
);
272 hci_dev
->dev
.parent
= &dev
->dev
;
273 hci_dev
->dev
.dma_mask
= &hci_dev
->dev
.coherent_dma_mask
;
275 ret
= platform_device_add_resources(hci_dev
, hci_res
,
276 ARRAY_SIZE(hci_res
));
280 ret
= platform_device_add_data(hci_dev
, &ohci_pdata
,
283 ret
= platform_device_add_data(hci_dev
, &ehci_pdata
,
287 ret
= platform_device_add(hci_dev
);
294 platform_device_put(hci_dev
);
298 static int bcma_hcd_probe(struct bcma_device
*dev
)
302 struct bcma_hcd_device
*usb_dev
;
303 struct bcma_chipinfo
*chipinfo
;
305 chipinfo
= &dev
->bus
->chipinfo
;
307 /* TODO: Probably need checks here; is the core connected? */
309 if (dma_set_mask_and_coherent(dev
->dma_dev
, DMA_BIT_MASK(32)))
312 usb_dev
= devm_kzalloc(&dev
->dev
, sizeof(struct bcma_hcd_device
),
317 bcma_hci_platform_power_gpio(dev
, true);
319 switch (dev
->id
.id
) {
320 case BCMA_CORE_NS_USB20
:
321 bcma_hcd_init_chip_arm(dev
);
323 case BCMA_CORE_USB20_HOST
:
324 bcma_hcd_init_chip_mips(dev
);
330 /* In AI chips EHCI is addrspace 0, OHCI is 1 */
331 ohci_addr
= dev
->addr_s
[0];
332 if ((chipinfo
->id
== BCMA_CHIP_ID_BCM5357
||
333 chipinfo
->id
== BCMA_CHIP_ID_BCM4749
)
334 && chipinfo
->rev
== 0)
335 ohci_addr
= 0x18009000;
337 usb_dev
->ohci_dev
= bcma_hcd_create_pdev(dev
, true, ohci_addr
);
338 if (IS_ERR(usb_dev
->ohci_dev
))
339 return PTR_ERR(usb_dev
->ohci_dev
);
341 usb_dev
->ehci_dev
= bcma_hcd_create_pdev(dev
, false, dev
->addr
);
342 if (IS_ERR(usb_dev
->ehci_dev
)) {
343 err
= PTR_ERR(usb_dev
->ehci_dev
);
344 goto err_unregister_ohci_dev
;
347 bcma_set_drvdata(dev
, usb_dev
);
350 err_unregister_ohci_dev
:
351 platform_device_unregister(usb_dev
->ohci_dev
);
355 static void bcma_hcd_remove(struct bcma_device
*dev
)
357 struct bcma_hcd_device
*usb_dev
= bcma_get_drvdata(dev
);
358 struct platform_device
*ohci_dev
= usb_dev
->ohci_dev
;
359 struct platform_device
*ehci_dev
= usb_dev
->ehci_dev
;
362 platform_device_unregister(ohci_dev
);
364 platform_device_unregister(ehci_dev
);
366 bcma_core_disable(dev
, 0);
369 static void bcma_hcd_shutdown(struct bcma_device
*dev
)
371 bcma_hci_platform_power_gpio(dev
, false);
372 bcma_core_disable(dev
, 0);
377 static int bcma_hcd_suspend(struct bcma_device
*dev
)
379 bcma_hci_platform_power_gpio(dev
, false);
380 bcma_core_disable(dev
, 0);
385 static int bcma_hcd_resume(struct bcma_device
*dev
)
387 bcma_hci_platform_power_gpio(dev
, true);
388 bcma_core_enable(dev
, 0);
393 #else /* !CONFIG_PM */
394 #define bcma_hcd_suspend NULL
395 #define bcma_hcd_resume NULL
396 #endif /* CONFIG_PM */
398 static const struct bcma_device_id bcma_hcd_table
[] = {
399 BCMA_CORE(BCMA_MANUF_BCM
, BCMA_CORE_USB20_HOST
, BCMA_ANY_REV
, BCMA_ANY_CLASS
),
400 BCMA_CORE(BCMA_MANUF_BCM
, BCMA_CORE_NS_USB20
, BCMA_ANY_REV
, BCMA_ANY_CLASS
),
403 MODULE_DEVICE_TABLE(bcma
, bcma_hcd_table
);
405 static struct bcma_driver bcma_hcd_driver
= {
406 .name
= KBUILD_MODNAME
,
407 .id_table
= bcma_hcd_table
,
408 .probe
= bcma_hcd_probe
,
409 .remove
= bcma_hcd_remove
,
410 .shutdown
= bcma_hcd_shutdown
,
411 .suspend
= bcma_hcd_suspend
,
412 .resume
= bcma_hcd_resume
,
415 static int __init
bcma_hcd_init(void)
417 return bcma_driver_register(&bcma_hcd_driver
);
419 module_init(bcma_hcd_init
);
421 static void __exit
bcma_hcd_exit(void)
423 bcma_driver_unregister(&bcma_hcd_driver
);
425 module_exit(bcma_hcd_exit
);