| 1 | From ad224c0d5fa0fc05f8aaef3c19fc9b4eb275a5d2 Mon Sep 17 00:00:00 2001 |
| 2 | From: Hauke Mehrtens <hauke@hauke-m.de> |
| 3 | Date: Sun, 18 Jul 2010 21:29:40 +0200 |
| 4 | Subject: [PATCH 2/2] USB: Add ehci ssb driver |
| 5 | |
| 6 | Support for the Sonics Silicon Backplane (SSB) attached Broadcom USB EHCI core. |
| 7 | |
| 8 | Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> |
| 9 | --- |
| 10 | drivers/usb/host/Kconfig | 13 ++ |
| 11 | drivers/usb/host/ehci-hcd.c | 22 ++++- |
| 12 | drivers/usb/host/ehci-ssb.c | 255 +++++++++++++++++++++++++++++++++++++++++++ |
| 13 | 3 files changed, 288 insertions(+), 2 deletions(-) |
| 14 | create mode 100644 drivers/usb/host/ehci-ssb.c |
| 15 | |
| 16 | --- a/drivers/usb/host/Kconfig |
| 17 | +++ b/drivers/usb/host/Kconfig |
| 18 | @@ -189,6 +189,19 @@ config USB_OXU210HP_HCD |
| 19 | To compile this driver as a module, choose M here: the |
| 20 | module will be called oxu210hp-hcd. |
| 21 | |
| 22 | +config USB_EHCI_HCD_SSB |
| 23 | + bool "EHCI support for Broadcom SSB EHCI core" |
| 24 | + depends on USB_EHCI_HCD && (SSB = y || SSB = USB_EHCI_HCD) && EXPERIMENTAL |
| 25 | + default n |
| 26 | + ---help--- |
| 27 | + Support for the Sonics Silicon Backplane (SSB) attached |
| 28 | + Broadcom USB EHCI core. |
| 29 | + |
| 30 | + This device is present in some embedded devices with |
| 31 | + Broadcom based SSB bus. |
| 32 | + |
| 33 | + If unsure, say N. |
| 34 | + |
| 35 | config USB_ISP116X_HCD |
| 36 | tristate "ISP116X HCD support" |
| 37 | depends on USB |
| 38 | --- a/drivers/usb/host/ehci-hcd.c |
| 39 | +++ b/drivers/usb/host/ehci-hcd.c |
| 40 | @@ -1256,9 +1256,14 @@ MODULE_LICENSE ("GPL"); |
| 41 | #define PLATFORM_DRIVER ehci_msm_driver |
| 42 | #endif |
| 43 | |
| 44 | +#ifdef CONFIG_USB_EHCI_HCD_SSB |
| 45 | +#include "ehci-ssb.c" |
| 46 | +#define SSB_EHCI_DRIVER ssb_ehci_driver |
| 47 | +#endif |
| 48 | + |
| 49 | #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \ |
| 50 | !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \ |
| 51 | - !defined(XILINX_OF_PLATFORM_DRIVER) |
| 52 | + !defined(XILINX_OF_PLATFORM_DRIVER) && !defined(SSB_EHCI_DRIVER) |
| 53 | #error "missing bus glue for ehci-hcd" |
| 54 | #endif |
| 55 | |
| 56 | @@ -1318,10 +1323,20 @@ static int __init ehci_hcd_init(void) |
| 57 | if (retval < 0) |
| 58 | goto clean4; |
| 59 | #endif |
| 60 | + |
| 61 | +#ifdef SSB_EHCI_DRIVER |
| 62 | + retval = ssb_driver_register(&SSB_EHCI_DRIVER); |
| 63 | + if (retval < 0) |
| 64 | + goto clean5; |
| 65 | +#endif |
| 66 | return retval; |
| 67 | |
| 68 | +#ifdef SSB_EHCI_DRIVER |
| 69 | + /* ssb_driver_unregister(&SSB_EHCI_DRIVER); */ |
| 70 | +clean5: |
| 71 | +#endif |
| 72 | #ifdef XILINX_OF_PLATFORM_DRIVER |
| 73 | - /* of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER); */ |
| 74 | + of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER); |
| 75 | clean4: |
| 76 | #endif |
| 77 | #ifdef OF_PLATFORM_DRIVER |
| 78 | @@ -1352,6 +1367,9 @@ module_init(ehci_hcd_init); |
| 79 | |
| 80 | static void __exit ehci_hcd_cleanup(void) |
| 81 | { |
| 82 | +#ifdef SSB_EHCI_DRIVER |
| 83 | + ssb_driver_unregister(&SSB_EHCI_DRIVER); |
| 84 | +#endif |
| 85 | #ifdef XILINX_OF_PLATFORM_DRIVER |
| 86 | of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER); |
| 87 | #endif |
| 88 | --- /dev/null |
| 89 | +++ b/drivers/usb/host/ehci-ssb.c |
| 90 | @@ -0,0 +1,255 @@ |
| 91 | +/* |
| 92 | + * Sonics Silicon Backplane |
| 93 | + * Broadcom USB-core EHCI driver (SSB bus glue) |
| 94 | + * |
| 95 | + * Copyright 2007 Steven Brown <sbrown@cortland.com> |
| 96 | + * Copyright 2010 Hauke Mehrtens <hauke@hauke-m.de> |
| 97 | + * |
| 98 | + * Derived from the OHCI-SSB driver |
| 99 | + * Copyright 2007 Michael Buesch <mb@bu3sch.de> |
| 100 | + * |
| 101 | + * Derived from the EHCI-PCI driver |
| 102 | + * Copyright (c) 2000-2004 by David Brownell |
| 103 | + * |
| 104 | + * Derived from the OHCI-PCI driver |
| 105 | + * Copyright 1999 Roman Weissgaerber |
| 106 | + * Copyright 2000-2002 David Brownell |
| 107 | + * Copyright 1999 Linus Torvalds |
| 108 | + * Copyright 1999 Gregory P. Smith |
| 109 | + * |
| 110 | + * Derived from the USBcore related parts of Broadcom-SB |
| 111 | + * Copyright 2005 Broadcom Corporation |
| 112 | + * |
| 113 | + * Licensed under the GNU/GPL. See COPYING for details. |
| 114 | + */ |
| 115 | +#include <linux/ssb/ssb.h> |
| 116 | + |
| 117 | + |
| 118 | +struct ssb_ehci_device { |
| 119 | + struct ehci_hcd ehci; /* _must_ be at the beginning. */ |
| 120 | +}; |
| 121 | + |
| 122 | +static inline |
| 123 | +struct ssb_ehci_device *hcd_to_ssb_ehci(struct usb_hcd *hcd) |
| 124 | +{ |
| 125 | + return (struct ssb_ehci_device *)(hcd->hcd_priv); |
| 126 | +} |
| 127 | + |
| 128 | +static int ssb_ehci_reset(struct usb_hcd *hcd) |
| 129 | +{ |
| 130 | + struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 131 | + int err; |
| 132 | + |
| 133 | + ehci->caps = hcd->regs; |
| 134 | + ehci->regs = hcd->regs + |
| 135 | + HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); |
| 136 | + |
| 137 | + dbg_hcs_params(ehci, "reset"); |
| 138 | + dbg_hcc_params(ehci, "reset"); |
| 139 | + |
| 140 | + ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); |
| 141 | + |
| 142 | + err = ehci_halt(ehci); |
| 143 | + |
| 144 | + if (err) |
| 145 | + return err; |
| 146 | + |
| 147 | + err = ehci_init(hcd); |
| 148 | + |
| 149 | + if (err) |
| 150 | + return err; |
| 151 | + |
| 152 | + ehci_reset(ehci); |
| 153 | + |
| 154 | + return err; |
| 155 | +} |
| 156 | + |
| 157 | +static const struct hc_driver ssb_ehci_hc_driver = { |
| 158 | + .description = "ssb-usb-ehci", |
| 159 | + .product_desc = "SSB EHCI Controller", |
| 160 | + .hcd_priv_size = sizeof(struct ssb_ehci_device), |
| 161 | + |
| 162 | + .irq = ehci_irq, |
| 163 | + .flags = HCD_MEMORY | HCD_USB2, |
| 164 | + |
| 165 | + .reset = ssb_ehci_reset, |
| 166 | + .start = ehci_run, |
| 167 | + .stop = ehci_stop, |
| 168 | + .shutdown = ehci_shutdown, |
| 169 | + |
| 170 | + .urb_enqueue = ehci_urb_enqueue, |
| 171 | + .urb_dequeue = ehci_urb_dequeue, |
| 172 | + .endpoint_disable = ehci_endpoint_disable, |
| 173 | + .endpoint_reset = ehci_endpoint_reset, |
| 174 | + |
| 175 | + .get_frame_number = ehci_get_frame, |
| 176 | + |
| 177 | + .hub_status_data = ehci_hub_status_data, |
| 178 | + .hub_control = ehci_hub_control, |
| 179 | +#if defined(CONFIG_PM) |
| 180 | + .bus_suspend = ehci_bus_suspend, |
| 181 | + .bus_resume = ehci_bus_resume, |
| 182 | +#endif |
| 183 | + .relinquish_port = ehci_relinquish_port, |
| 184 | + .port_handed_over = ehci_port_handed_over, |
| 185 | + |
| 186 | + .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
| 187 | +}; |
| 188 | + |
| 189 | +static void ssb_ehci_detach(struct ssb_device *dev) |
| 190 | +{ |
| 191 | + struct usb_hcd *hcd = ssb_get_drvdata(dev); |
| 192 | + |
| 193 | + if (hcd->driver->shutdown) |
| 194 | + hcd->driver->shutdown(hcd); |
| 195 | + usb_remove_hcd(hcd); |
| 196 | + iounmap(hcd->regs); |
| 197 | + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 198 | + usb_put_hcd(hcd); |
| 199 | + ssb_device_disable(dev, 0); |
| 200 | +} |
| 201 | + |
| 202 | +static int ssb_ehci_attach(struct ssb_device *dev) |
| 203 | +{ |
| 204 | + struct ssb_ehci_device *ehcidev; |
| 205 | + struct usb_hcd *hcd; |
| 206 | + int err = -ENOMEM; |
| 207 | + u32 tmp; |
| 208 | + |
| 209 | + if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) || |
| 210 | + dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32))) |
| 211 | + return -EOPNOTSUPP; |
| 212 | + |
| 213 | + /* |
| 214 | + * USB 2.0 special considerations: |
| 215 | + * |
| 216 | + * In addition to the standard SSB reset sequence, the Host Control |
| 217 | + * Register must be programmed to bring the USB core and various phy |
| 218 | + * components out of reset. |
| 219 | + */ |
| 220 | + ssb_device_enable(dev, 0); |
| 221 | + ssb_write32(dev, 0x200, 0x7ff); |
| 222 | + |
| 223 | + /* Change Flush control reg */ |
| 224 | + tmp = ssb_read32(dev, 0x400); |
| 225 | + tmp &= ~8; |
| 226 | + ssb_write32(dev, 0x400, tmp); |
| 227 | + tmp = ssb_read32(dev, 0x400); |
| 228 | + |
| 229 | + /* Change Shim control reg */ |
| 230 | + tmp = ssb_read32(dev, 0x304); |
| 231 | + tmp &= ~0x100; |
| 232 | + ssb_write32(dev, 0x304, tmp); |
| 233 | + tmp = ssb_read32(dev, 0x304); |
| 234 | + |
| 235 | + udelay(1); |
| 236 | + |
| 237 | + /* Work around for 5354 failures */ |
| 238 | + if (dev->id.revision == 2 && dev->bus->chip_id == 0x5354) { |
| 239 | + /* Change syn01 reg */ |
| 240 | + tmp = 0x00fe00fe; |
| 241 | + ssb_write32(dev, 0x894, tmp); |
| 242 | + |
| 243 | + /* Change syn03 reg */ |
| 244 | + tmp = ssb_read32(dev, 0x89c); |
| 245 | + tmp |= 0x1; |
| 246 | + ssb_write32(dev, 0x89c, tmp); |
| 247 | + } |
| 248 | + |
| 249 | + hcd = usb_create_hcd(&ssb_ehci_hc_driver, dev->dev, |
| 250 | + dev_name(dev->dev)); |
| 251 | + if (!hcd) |
| 252 | + goto err_dev_disable; |
| 253 | + |
| 254 | + ehcidev = hcd_to_ssb_ehci(hcd); |
| 255 | + tmp = ssb_read32(dev, SSB_ADMATCH0); |
| 256 | + hcd->rsrc_start = ssb_admatch_base(tmp) + 0x800; /* ehci core offset */ |
| 257 | + hcd->rsrc_len = 0x100; /* ehci reg block size */ |
| 258 | + /* |
| 259 | + * start & size modified per sbutils.c |
| 260 | + */ |
| 261 | + hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); |
| 262 | + if (!hcd->regs) |
| 263 | + goto err_put_hcd; |
| 264 | + err = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED); |
| 265 | + if (err) |
| 266 | + goto err_iounmap; |
| 267 | + |
| 268 | + ssb_set_drvdata(dev, hcd); |
| 269 | + |
| 270 | + return err; |
| 271 | + |
| 272 | +err_iounmap: |
| 273 | + iounmap(hcd->regs); |
| 274 | +err_put_hcd: |
| 275 | + usb_put_hcd(hcd); |
| 276 | +err_dev_disable: |
| 277 | + ssb_device_disable(dev, 0); |
| 278 | + return err; |
| 279 | +} |
| 280 | + |
| 281 | +static int ssb_ehci_probe(struct ssb_device *dev, |
| 282 | + const struct ssb_device_id *id) |
| 283 | +{ |
| 284 | + int err; |
| 285 | + u16 chipid_top; |
| 286 | + |
| 287 | + /* USBcores are only connected on embedded devices. */ |
| 288 | + chipid_top = (dev->bus->chip_id & 0xFF00); |
| 289 | + if (chipid_top != 0x4700 && chipid_top != 0x5300) |
| 290 | + return -ENODEV; |
| 291 | + |
| 292 | + /* TODO: Probably need checks here; is the core connected? */ |
| 293 | + |
| 294 | + if (usb_disabled()) |
| 295 | + return -ENODEV; |
| 296 | + |
| 297 | + err = ssb_ehci_attach(dev); |
| 298 | + |
| 299 | + return err; |
| 300 | +} |
| 301 | + |
| 302 | +static void ssb_ehci_remove(struct ssb_device *dev) |
| 303 | +{ |
| 304 | + ssb_ehci_detach(dev); |
| 305 | +} |
| 306 | + |
| 307 | +#ifdef CONFIG_PM |
| 308 | + |
| 309 | +static int ssb_ehci_suspend(struct ssb_device *dev, pm_message_t state) |
| 310 | +{ |
| 311 | + ssb_device_disable(dev, 0); |
| 312 | + |
| 313 | + return 0; |
| 314 | +} |
| 315 | + |
| 316 | +static int ssb_ehci_resume(struct ssb_device *dev) |
| 317 | +{ |
| 318 | + struct usb_hcd *hcd = ssb_get_drvdata(dev); |
| 319 | + struct ssb_ehci_device *ehcidev = hcd_to_ssb_ehci(hcd); |
| 320 | + |
| 321 | + ssb_device_enable(dev, 0); |
| 322 | + |
| 323 | + ehci_finish_controller_resume(hcd); |
| 324 | + return 0; |
| 325 | +} |
| 326 | + |
| 327 | +#else /* !CONFIG_PM */ |
| 328 | +#define ssb_ehci_suspend NULL |
| 329 | +#define ssb_ehci_resume NULL |
| 330 | +#endif /* CONFIG_PM */ |
| 331 | + |
| 332 | +static const struct ssb_device_id ssb_ehci_table[] = { |
| 333 | + SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV), |
| 334 | + SSB_DEVTABLE_END |
| 335 | +}; |
| 336 | +MODULE_DEVICE_TABLE(ssb, ssb_ehci_table); |
| 337 | + |
| 338 | +static struct ssb_driver ssb_ehci_driver = { |
| 339 | + .name = KBUILD_MODNAME, |
| 340 | + .id_table = ssb_ehci_table, |
| 341 | + .probe = ssb_ehci_probe, |
| 342 | + .remove = ssb_ehci_remove, |
| 343 | + .suspend = ssb_ehci_suspend, |
| 344 | + .resume = ssb_ehci_resume, |
| 345 | +}; |
| 346 | |
