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>
27 #include <linux/usb/ehci_pdriver.h>
28 #include <linux/usb/ohci_pdriver.h>
30 MODULE_AUTHOR("Hauke Mehrtens");
31 MODULE_DESCRIPTION("Common USB driver for BCMA Bus");
32 MODULE_LICENSE("GPL");
34 struct bcma_hcd_device {
35 struct platform_device *ehci_dev;
36 struct platform_device *ohci_dev;
39 /* Wait for bitmask in a register to get set or cleared.
40 * timeout is in units of ten-microseconds.
42 static int bcma_wait_bits(struct bcma_device *dev, u16 reg, u32 bitmask,
48 for (i = 0; i < timeout; i++) {
49 val = bcma_read32(dev, reg);
50 if ((val & bitmask) == bitmask)
58 static void bcma_hcd_4716wa(struct bcma_device *dev)
60 #ifdef CONFIG_BCMA_DRIVER_MIPS
61 /* Work around for 4716 failures. */
62 if (dev->bus->chipinfo.id == 0x4716) {
65 tmp = bcma_cpu_clock(&dev->bus->drv_mips);
67 tmp = 0x1846b; /* set CDR to 0x11(fast) */
68 else if (tmp == 453000000)
69 tmp = 0x1046b; /* set CDR to 0x10(slow) */
73 /* Change Shim mdio control reg to fix host not acking at
77 bcma_write32(dev, 0x524, 0x1); /* write sel to enable */
80 bcma_write32(dev, 0x524, tmp);
82 bcma_write32(dev, 0x524, 0x4ab);
84 bcma_read32(dev, 0x528);
85 bcma_write32(dev, 0x528, 0x80000000);
88 #endif /* CONFIG_BCMA_DRIVER_MIPS */
91 /* based on arch/mips/brcm-boards/bcm947xx/pcibios.c */
92 static void bcma_hcd_init_chip_mips(struct bcma_device *dev)
97 * USB 2.0 special considerations:
99 * 1. Since the core supports both OHCI and EHCI functions, it must
100 * only be reset once.
102 * 2. In addition to the standard SI reset sequence, the Host Control
103 * Register must be programmed to bring the USB core and various
104 * phy components out of reset.
106 if (!bcma_core_is_enabled(dev)) {
107 bcma_core_enable(dev, 0);
109 if (dev->id.rev >= 5) {
110 /* Enable Misc PLL */
111 tmp = bcma_read32(dev, 0x1e0);
113 bcma_write32(dev, 0x1e0, tmp);
114 if (bcma_wait_bits(dev, 0x1e0, 1 << 24, 100))
115 printk(KERN_EMERG "Failed to enable misc PPL!\n");
117 /* Take out of resets */
118 bcma_write32(dev, 0x200, 0x4ff);
120 bcma_write32(dev, 0x200, 0x6ff);
123 /* Make sure digital and AFE are locked in USB PHY */
124 bcma_write32(dev, 0x524, 0x6b);
126 tmp = bcma_read32(dev, 0x524);
128 bcma_write32(dev, 0x524, 0xab);
130 tmp = bcma_read32(dev, 0x524);
132 bcma_write32(dev, 0x524, 0x2b);
134 tmp = bcma_read32(dev, 0x524);
136 bcma_write32(dev, 0x524, 0x10ab);
138 tmp = bcma_read32(dev, 0x524);
140 if (bcma_wait_bits(dev, 0x528, 0xc000, 10000)) {
141 tmp = bcma_read32(dev, 0x528);
143 "USB20H mdio_rddata 0x%08x\n", tmp);
145 bcma_write32(dev, 0x528, 0x80000000);
146 tmp = bcma_read32(dev, 0x314);
148 bcma_write32(dev, 0x200, 0x7ff);
151 /* Take USB and HSIC out of non-driving modes */
152 bcma_write32(dev, 0x510, 0);
154 bcma_write32(dev, 0x200, 0x7ff);
159 bcma_hcd_4716wa(dev);
163 static void bcma_hcd_init_chip_arm_phy(struct bcma_device *dev)
165 struct bcma_device *arm_core;
168 arm_core = bcma_find_core(dev->bus, BCMA_CORE_ARMCA9);
170 dev_err(&dev->dev, "can not find ARM Cortex A9 ihost core\n");
174 dmu = ioremap_nocache(arm_core->addr_s[0], 0x1000);
176 dev_err(&dev->dev, "can not map ARM Cortex A9 ihost core\n");
180 /* Unlock DMU PLL settings */
181 iowrite32(0x0000ea68, dmu + 0x180);
183 /* Write USB 2.0 PLL control setting */
184 iowrite32(0x00dd10c3, dmu + 0x164);
186 /* Lock DMU PLL settings */
187 iowrite32(0x00000000, dmu + 0x180);
192 static void bcma_hcd_init_chip_arm_hc(struct bcma_device *dev)
197 * Delay after PHY initialized to ensure HC is ready to be configured
199 usleep_range(1000, 2000);
201 /* Set packet buffer OUT threshold */
202 val = bcma_read32(dev, 0x94);
205 bcma_write32(dev, 0x94, val);
207 /* Enable break memory transfer */
208 val = bcma_read32(dev, 0x9c);
210 bcma_write32(dev, 0x9c, val);
213 static void bcma_hcd_init_chip_arm(struct bcma_device *dev)
215 bcma_core_enable(dev, 0);
217 if (dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM4707 ||
218 dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM53018) {
219 if (dev->bus->chipinfo.pkg == BCMA_PKG_ID_BCM4707 ||
220 dev->bus->chipinfo.pkg == BCMA_PKG_ID_BCM4708)
221 bcma_hcd_init_chip_arm_phy(dev);
223 bcma_hcd_init_chip_arm_hc(dev);
227 static const struct usb_ehci_pdata ehci_pdata = {
230 static const struct usb_ohci_pdata ohci_pdata = {
233 static struct platform_device *bcma_hcd_create_pdev(struct bcma_device *dev, bool ohci, u32 addr)
235 struct platform_device *hci_dev;
236 struct resource hci_res[2];
239 memset(hci_res, 0, sizeof(hci_res));
241 hci_res[0].start = addr;
242 hci_res[0].end = hci_res[0].start + 0x1000 - 1;
243 hci_res[0].flags = IORESOURCE_MEM;
245 hci_res[1].start = dev->irq;
246 hci_res[1].flags = IORESOURCE_IRQ;
248 hci_dev = platform_device_alloc(ohci ? "ohci-platform" :
249 "ehci-platform" , 0);
251 return ERR_PTR(-ENOMEM);
253 hci_dev->dev.parent = &dev->dev;
254 hci_dev->dev.dma_mask = &hci_dev->dev.coherent_dma_mask;
256 ret = platform_device_add_resources(hci_dev, hci_res,
257 ARRAY_SIZE(hci_res));
261 ret = platform_device_add_data(hci_dev, &ohci_pdata,
264 ret = platform_device_add_data(hci_dev, &ehci_pdata,
268 ret = platform_device_add(hci_dev);
275 platform_device_put(hci_dev);
279 static int bcma_hcd_probe(struct bcma_device *dev)
283 struct bcma_hcd_device *usb_dev;
284 struct bcma_chipinfo *chipinfo;
286 chipinfo = &dev->bus->chipinfo;
288 /* TODO: Probably need checks here; is the core connected? */
290 if (dma_set_mask_and_coherent(dev->dma_dev, DMA_BIT_MASK(32)))
293 usb_dev = devm_kzalloc(&dev->dev, sizeof(struct bcma_hcd_device),
298 switch (dev->id.id) {
299 case BCMA_CORE_NS_USB20:
300 bcma_hcd_init_chip_arm(dev);
302 case BCMA_CORE_USB20_HOST:
303 bcma_hcd_init_chip_mips(dev);
309 /* In AI chips EHCI is addrspace 0, OHCI is 1 */
310 ohci_addr = dev->addr_s[0];
311 if ((chipinfo->id == BCMA_CHIP_ID_BCM5357 ||
312 chipinfo->id == BCMA_CHIP_ID_BCM4749)
313 && chipinfo->rev == 0)
314 ohci_addr = 0x18009000;
316 usb_dev->ohci_dev = bcma_hcd_create_pdev(dev, true, ohci_addr);
317 if (IS_ERR(usb_dev->ohci_dev))
318 return PTR_ERR(usb_dev->ohci_dev);
320 usb_dev->ehci_dev = bcma_hcd_create_pdev(dev, false, dev->addr);
321 if (IS_ERR(usb_dev->ehci_dev)) {
322 err = PTR_ERR(usb_dev->ehci_dev);
323 goto err_unregister_ohci_dev;
326 bcma_set_drvdata(dev, usb_dev);
329 err_unregister_ohci_dev:
330 platform_device_unregister(usb_dev->ohci_dev);
334 static void bcma_hcd_remove(struct bcma_device *dev)
336 struct bcma_hcd_device *usb_dev = bcma_get_drvdata(dev);
337 struct platform_device *ohci_dev = usb_dev->ohci_dev;
338 struct platform_device *ehci_dev = usb_dev->ehci_dev;
341 platform_device_unregister(ohci_dev);
343 platform_device_unregister(ehci_dev);
345 bcma_core_disable(dev, 0);
348 static void bcma_hcd_shutdown(struct bcma_device *dev)
350 bcma_core_disable(dev, 0);
355 static int bcma_hcd_suspend(struct bcma_device *dev)
357 bcma_core_disable(dev, 0);
362 static int bcma_hcd_resume(struct bcma_device *dev)
364 bcma_core_enable(dev, 0);
369 #else /* !CONFIG_PM */
370 #define bcma_hcd_suspend NULL
371 #define bcma_hcd_resume NULL
372 #endif /* CONFIG_PM */
374 static const struct bcma_device_id bcma_hcd_table[] = {
375 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_USB20_HOST, BCMA_ANY_REV, BCMA_ANY_CLASS),
376 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_NS_USB20, BCMA_ANY_REV, BCMA_ANY_CLASS),
379 MODULE_DEVICE_TABLE(bcma, bcma_hcd_table);
381 static struct bcma_driver bcma_hcd_driver = {
382 .name = KBUILD_MODNAME,
383 .id_table = bcma_hcd_table,
384 .probe = bcma_hcd_probe,
385 .remove = bcma_hcd_remove,
386 .shutdown = bcma_hcd_shutdown,
387 .suspend = bcma_hcd_suspend,
388 .resume = bcma_hcd_resume,
391 static int __init bcma_hcd_init(void)
393 return bcma_driver_register(&bcma_hcd_driver);
395 module_init(bcma_hcd_init);
397 static void __exit bcma_hcd_exit(void)
399 bcma_driver_unregister(&bcma_hcd_driver);
401 module_exit(bcma_hcd_exit);