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/gpio/consumer.h>
25 #include <linux/platform_device.h>
26 #include <linux/module.h>
27 #include <linux/slab.h>
29 #include <linux/of_gpio.h>
30 #include <linux/usb/ehci_pdriver.h>
31 #include <linux/usb/ohci_pdriver.h>
33 MODULE_AUTHOR("Hauke Mehrtens");
34 MODULE_DESCRIPTION("Common USB driver for BCMA Bus");
35 MODULE_LICENSE("GPL");
37 struct bcma_hcd_device
{
38 struct platform_device
*ehci_dev
;
39 struct platform_device
*ohci_dev
;
40 struct gpio_desc
*gpio_desc
;
43 /* Wait for bitmask in a register to get set or cleared.
44 * timeout is in units of ten-microseconds.
46 static int bcma_wait_bits(struct bcma_device
*dev
, u16 reg
, u32 bitmask
,
52 for (i
= 0; i
< timeout
; i
++) {
53 val
= bcma_read32(dev
, reg
);
54 if ((val
& bitmask
) == bitmask
)
62 static void bcma_hcd_4716wa(struct bcma_device
*dev
)
64 #ifdef CONFIG_BCMA_DRIVER_MIPS
65 /* Work around for 4716 failures. */
66 if (dev
->bus
->chipinfo
.id
== 0x4716) {
69 tmp
= bcma_cpu_clock(&dev
->bus
->drv_mips
);
71 tmp
= 0x1846b; /* set CDR to 0x11(fast) */
72 else if (tmp
== 453000000)
73 tmp
= 0x1046b; /* set CDR to 0x10(slow) */
77 /* Change Shim mdio control reg to fix host not acking at
81 bcma_write32(dev
, 0x524, 0x1); /* write sel to enable */
84 bcma_write32(dev
, 0x524, tmp
);
86 bcma_write32(dev
, 0x524, 0x4ab);
88 bcma_read32(dev
, 0x528);
89 bcma_write32(dev
, 0x528, 0x80000000);
92 #endif /* CONFIG_BCMA_DRIVER_MIPS */
95 /* based on arch/mips/brcm-boards/bcm947xx/pcibios.c */
96 static void bcma_hcd_init_chip_mips(struct bcma_device
*dev
)
101 * USB 2.0 special considerations:
103 * 1. Since the core supports both OHCI and EHCI functions, it must
104 * only be reset once.
106 * 2. In addition to the standard SI reset sequence, the Host Control
107 * Register must be programmed to bring the USB core and various
108 * phy components out of reset.
110 if (!bcma_core_is_enabled(dev
)) {
111 bcma_core_enable(dev
, 0);
113 if (dev
->id
.rev
>= 5) {
114 /* Enable Misc PLL */
115 tmp
= bcma_read32(dev
, 0x1e0);
117 bcma_write32(dev
, 0x1e0, tmp
);
118 if (bcma_wait_bits(dev
, 0x1e0, 1 << 24, 100))
119 printk(KERN_EMERG
"Failed to enable misc PPL!\n");
121 /* Take out of resets */
122 bcma_write32(dev
, 0x200, 0x4ff);
124 bcma_write32(dev
, 0x200, 0x6ff);
127 /* Make sure digital and AFE are locked in USB PHY */
128 bcma_write32(dev
, 0x524, 0x6b);
130 tmp
= bcma_read32(dev
, 0x524);
132 bcma_write32(dev
, 0x524, 0xab);
134 tmp
= bcma_read32(dev
, 0x524);
136 bcma_write32(dev
, 0x524, 0x2b);
138 tmp
= bcma_read32(dev
, 0x524);
140 bcma_write32(dev
, 0x524, 0x10ab);
142 tmp
= bcma_read32(dev
, 0x524);
144 if (bcma_wait_bits(dev
, 0x528, 0xc000, 10000)) {
145 tmp
= bcma_read32(dev
, 0x528);
147 "USB20H mdio_rddata 0x%08x\n", tmp
);
149 bcma_write32(dev
, 0x528, 0x80000000);
150 tmp
= bcma_read32(dev
, 0x314);
152 bcma_write32(dev
, 0x200, 0x7ff);
155 /* Take USB and HSIC out of non-driving modes */
156 bcma_write32(dev
, 0x510, 0);
158 bcma_write32(dev
, 0x200, 0x7ff);
163 bcma_hcd_4716wa(dev
);
167 static void bcma_hcd_init_chip_arm_phy(struct bcma_device
*dev
)
169 struct bcma_device
*arm_core
;
172 arm_core
= bcma_find_core(dev
->bus
, BCMA_CORE_ARMCA9
);
174 dev_err(&dev
->dev
, "can not find ARM Cortex A9 ihost core\n");
178 dmu
= ioremap_nocache(arm_core
->addr_s
[0], 0x1000);
180 dev_err(&dev
->dev
, "can not map ARM Cortex A9 ihost core\n");
184 /* Unlock DMU PLL settings */
185 iowrite32(0x0000ea68, dmu
+ 0x180);
187 /* Write USB 2.0 PLL control setting */
188 iowrite32(0x00dd10c3, dmu
+ 0x164);
190 /* Lock DMU PLL settings */
191 iowrite32(0x00000000, dmu
+ 0x180);
196 static void bcma_hcd_init_chip_arm_hc(struct bcma_device
*dev
)
201 * Delay after PHY initialized to ensure HC is ready to be configured
203 usleep_range(1000, 2000);
205 /* Set packet buffer OUT threshold */
206 val
= bcma_read32(dev
, 0x94);
209 bcma_write32(dev
, 0x94, val
);
211 /* Enable break memory transfer */
212 val
= bcma_read32(dev
, 0x9c);
214 bcma_write32(dev
, 0x9c, val
);
217 static void bcma_hcd_init_chip_arm(struct bcma_device
*dev
)
219 bcma_core_enable(dev
, 0);
221 if (dev
->bus
->chipinfo
.id
== BCMA_CHIP_ID_BCM4707
||
222 dev
->bus
->chipinfo
.id
== BCMA_CHIP_ID_BCM53018
) {
223 if (dev
->bus
->chipinfo
.pkg
== BCMA_PKG_ID_BCM4707
||
224 dev
->bus
->chipinfo
.pkg
== BCMA_PKG_ID_BCM4708
)
225 bcma_hcd_init_chip_arm_phy(dev
);
227 bcma_hcd_init_chip_arm_hc(dev
);
231 static void bcma_hci_platform_power_gpio(struct bcma_device
*dev
, bool val
)
233 struct bcma_hcd_device
*usb_dev
= bcma_get_drvdata(dev
);
235 if (IS_ERR_OR_NULL(usb_dev
->gpio_desc
))
238 gpiod_set_value(usb_dev
->gpio_desc
, val
);
241 static const struct usb_ehci_pdata ehci_pdata
= {
244 static const struct usb_ohci_pdata ohci_pdata
= {
247 static struct platform_device
*bcma_hcd_create_pdev(struct bcma_device
*dev
, bool ohci
, u32 addr
)
249 struct platform_device
*hci_dev
;
250 struct resource hci_res
[2];
253 memset(hci_res
, 0, sizeof(hci_res
));
255 hci_res
[0].start
= addr
;
256 hci_res
[0].end
= hci_res
[0].start
+ 0x1000 - 1;
257 hci_res
[0].flags
= IORESOURCE_MEM
;
259 hci_res
[1].start
= dev
->irq
;
260 hci_res
[1].flags
= IORESOURCE_IRQ
;
262 hci_dev
= platform_device_alloc(ohci
? "ohci-platform" :
263 "ehci-platform" , 0);
265 return ERR_PTR(-ENOMEM
);
267 hci_dev
->dev
.parent
= &dev
->dev
;
268 hci_dev
->dev
.dma_mask
= &hci_dev
->dev
.coherent_dma_mask
;
270 ret
= platform_device_add_resources(hci_dev
, hci_res
,
271 ARRAY_SIZE(hci_res
));
275 ret
= platform_device_add_data(hci_dev
, &ohci_pdata
,
278 ret
= platform_device_add_data(hci_dev
, &ehci_pdata
,
282 ret
= platform_device_add(hci_dev
);
289 platform_device_put(hci_dev
);
293 static int bcma_hcd_probe(struct bcma_device
*dev
)
297 struct bcma_hcd_device
*usb_dev
;
298 struct bcma_chipinfo
*chipinfo
;
300 chipinfo
= &dev
->bus
->chipinfo
;
302 /* TODO: Probably need checks here; is the core connected? */
304 if (dma_set_mask_and_coherent(dev
->dma_dev
, DMA_BIT_MASK(32)))
307 usb_dev
= devm_kzalloc(&dev
->dev
, sizeof(struct bcma_hcd_device
),
312 if (dev
->dev
.of_node
)
313 usb_dev
->gpio_desc
= devm_get_gpiod_from_child(&dev
->dev
, "vcc",
314 &dev
->dev
.of_node
->fwnode
);
315 if (!IS_ERR_OR_NULL(usb_dev
->gpio_desc
))
316 gpiod_direction_output(usb_dev
->gpio_desc
, 1);
318 switch (dev
->id
.id
) {
319 case BCMA_CORE_NS_USB20
:
320 bcma_hcd_init_chip_arm(dev
);
322 case BCMA_CORE_USB20_HOST
:
323 bcma_hcd_init_chip_mips(dev
);
329 /* In AI chips EHCI is addrspace 0, OHCI is 1 */
330 ohci_addr
= dev
->addr_s
[0];
331 if ((chipinfo
->id
== BCMA_CHIP_ID_BCM5357
||
332 chipinfo
->id
== BCMA_CHIP_ID_BCM4749
)
333 && chipinfo
->rev
== 0)
334 ohci_addr
= 0x18009000;
336 usb_dev
->ohci_dev
= bcma_hcd_create_pdev(dev
, true, ohci_addr
);
337 if (IS_ERR(usb_dev
->ohci_dev
))
338 return PTR_ERR(usb_dev
->ohci_dev
);
340 usb_dev
->ehci_dev
= bcma_hcd_create_pdev(dev
, false, dev
->addr
);
341 if (IS_ERR(usb_dev
->ehci_dev
)) {
342 err
= PTR_ERR(usb_dev
->ehci_dev
);
343 goto err_unregister_ohci_dev
;
346 bcma_set_drvdata(dev
, usb_dev
);
349 err_unregister_ohci_dev
:
350 platform_device_unregister(usb_dev
->ohci_dev
);
354 static void bcma_hcd_remove(struct bcma_device
*dev
)
356 struct bcma_hcd_device
*usb_dev
= bcma_get_drvdata(dev
);
357 struct platform_device
*ohci_dev
= usb_dev
->ohci_dev
;
358 struct platform_device
*ehci_dev
= usb_dev
->ehci_dev
;
361 platform_device_unregister(ohci_dev
);
363 platform_device_unregister(ehci_dev
);
365 bcma_core_disable(dev
, 0);
368 static void bcma_hcd_shutdown(struct bcma_device
*dev
)
370 bcma_hci_platform_power_gpio(dev
, false);
371 bcma_core_disable(dev
, 0);
376 static int bcma_hcd_suspend(struct bcma_device
*dev
)
378 bcma_hci_platform_power_gpio(dev
, false);
379 bcma_core_disable(dev
, 0);
384 static int bcma_hcd_resume(struct bcma_device
*dev
)
386 bcma_hci_platform_power_gpio(dev
, true);
387 bcma_core_enable(dev
, 0);
392 #else /* !CONFIG_PM */
393 #define bcma_hcd_suspend NULL
394 #define bcma_hcd_resume NULL
395 #endif /* CONFIG_PM */
397 static const struct bcma_device_id bcma_hcd_table
[] = {
398 BCMA_CORE(BCMA_MANUF_BCM
, BCMA_CORE_USB20_HOST
, BCMA_ANY_REV
, BCMA_ANY_CLASS
),
399 BCMA_CORE(BCMA_MANUF_BCM
, BCMA_CORE_NS_USB20
, BCMA_ANY_REV
, BCMA_ANY_CLASS
),
402 MODULE_DEVICE_TABLE(bcma
, bcma_hcd_table
);
404 static struct bcma_driver bcma_hcd_driver
= {
405 .name
= KBUILD_MODNAME
,
406 .id_table
= bcma_hcd_table
,
407 .probe
= bcma_hcd_probe
,
408 .remove
= bcma_hcd_remove
,
409 .shutdown
= bcma_hcd_shutdown
,
410 .suspend
= bcma_hcd_suspend
,
411 .resume
= bcma_hcd_resume
,
414 static int __init
bcma_hcd_init(void)
416 return bcma_driver_register(&bcma_hcd_driver
);
418 module_init(bcma_hcd_init
);
420 static void __exit
bcma_hcd_exit(void)
422 bcma_driver_unregister(&bcma_hcd_driver
);
424 module_exit(bcma_hcd_exit
);