drivers/usb/host/ehci-fsl.c

   1 /*
   2  * Copyright 2005-2009 MontaVista Software, Inc.
   3  * Copyright 2008      Freescale Semiconductor, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software Foundation,
  17  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *
  19  * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided
  20  * by Hunter Wu.
  21  * Power Management support by Dave Liu <daveliu@freescale.com>,
  22  * Jerry Huang <Chang-Ming.Huang@freescale.com> and
  23  * Anton Vorontsov <avorontsov@ru.mvista.com>.
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/types.h>
  28 #include <linux/delay.h>
  29 #include <linux/pm.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/fsl_devices.h>
  32
  33 #include "ehci-fsl.h"
  34
  35 /* configure so an HC device and id are always provided */
  36 /* always called with process context; sleeping is OK */
  37
  38 /**
  39  * usb_hcd_fsl_probe - initialize FSL-based HCDs
  40  * @drvier: Driver to be used for this HCD
  41  * @pdev: USB Host Controller being probed
  42  * Context: !in_interrupt()
  43  *
  44  * Allocates basic resources for this USB host controller.
  45  *
  46  */
  47 static int usb_hcd_fsl_probe(const struct hc_driver *driver,
  48                              struct platform_device *pdev)
  49 {
  50         struct fsl_usb2_platform_data *pdata;
  51         struct usb_hcd *hcd;
  52         struct resource *res;
  53         int irq;
  54         int retval;
  55         unsigned int temp;
  56
  57         pr_debug("initializing FSL-SOC USB Controller\n");
  58
  59         /* Need platform data for setup */
  60         pdata = (struct fsl_usb2_platform_data *)pdev->dev.platform_data;
  61         if (!pdata) {
  62                 dev_err(&pdev->dev,
  63                         "No platform data for %s.\n", dev_name(&pdev->dev));
  64                 return -ENODEV;
  65         }
  66
  67         /*
  68          * This is a host mode driver, verify that we're supposed to be
  69          * in host mode.
  70          */
  71         if (!((pdata->operating_mode == FSL_USB2_DR_HOST) ||
  72               (pdata->operating_mode == FSL_USB2_MPH_HOST) ||
  73               (pdata->operating_mode == FSL_USB2_DR_OTG))) {
  74                 dev_err(&pdev->dev,
  75                         "Non Host Mode configured for %s. Wrong driver linked.\n",
  76                         dev_name(&pdev->dev));
  77                 return -ENODEV;
  78         }
  79
  80         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  81         if (!res) {
  82                 dev_err(&pdev->dev,
  83                         "Found HC with no IRQ. Check %s setup!\n",
  84                         dev_name(&pdev->dev));
  85                 return -ENODEV;
  86         }
  87         irq = res->start;
  88
  89         hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
  90         if (!hcd) {
  91                 retval = -ENOMEM;
  92                 goto err1;
  93         }
  94
  95         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  96         if (!res) {
  97                 dev_err(&pdev->dev,
  98                         "Found HC with no register addr. Check %s setup!\n",
  99                         dev_name(&pdev->dev));
 100                 retval = -ENODEV;
 101                 goto err2;
 102         }
 103         hcd->rsrc_start = res->start;
 104         hcd->rsrc_len = res->end - res->start + 1;
 105         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
 106                                 driver->description)) {
 107                 dev_dbg(&pdev->dev, "controller already in use\n");
 108                 retval = -EBUSY;
 109                 goto err2;
 110         }
 111         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 112
 113         if (hcd->regs == NULL) {
 114                 dev_dbg(&pdev->dev, "error mapping memory\n");
 115                 retval = -EFAULT;
 116                 goto err3;
 117         }
 118
 119         /* Enable USB controller */
 120         temp = in_be32(hcd->regs + 0x500);
 121         out_be32(hcd->regs + 0x500, temp | 0x4);
 122
 123         /* Set to Host mode */
 124         temp = in_le32(hcd->regs + 0x1a8);
 125         out_le32(hcd->regs + 0x1a8, temp | 0x3);
 126
 127         retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
 128         if (retval != 0)
 129                 goto err4;
 130         return retval;
 131
 132       err4:
 133         iounmap(hcd->regs);
 134       err3:
 135         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 136       err2:
 137         usb_put_hcd(hcd);
 138       err1:
 139         dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
 140         return retval;
 141 }
 142
 143 /* may be called without controller electrically present */
 144 /* may be called with controller, bus, and devices active */
 145
 146 /**
 147  * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs
 148  * @dev: USB Host Controller being removed
 149  * Context: !in_interrupt()
 150  *
 151  * Reverses the effect of usb_hcd_fsl_probe().
 152  *
 153  */
 154 static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
 155                                struct platform_device *pdev)
 156 {
 157         usb_remove_hcd(hcd);
 158         iounmap(hcd->regs);
 159         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 160         usb_put_hcd(hcd);
 161 }
 162
 163 static void mpc83xx_setup_phy(struct ehci_hcd *ehci,
 164                               enum fsl_usb2_phy_modes phy_mode,
 165                               unsigned int port_offset)
 166 {
 167         u32 portsc = 0;
 168         switch (phy_mode) {
 169         case FSL_USB2_PHY_ULPI:
 170                 portsc |= PORT_PTS_ULPI;
 171                 break;
 172         case FSL_USB2_PHY_SERIAL:
 173                 portsc |= PORT_PTS_SERIAL;
 174                 break;
 175         case FSL_USB2_PHY_UTMI_WIDE:
 176                 portsc |= PORT_PTS_PTW;
 177                 /* fall through */
 178         case FSL_USB2_PHY_UTMI:
 179                 portsc |= PORT_PTS_UTMI;
 180                 break;
 181         case FSL_USB2_PHY_NONE:
 182                 break;
 183         }
 184         ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
 185 }
 186
 187 static void mpc83xx_usb_setup(struct usb_hcd *hcd)
 188 {
 189         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 190         struct fsl_usb2_platform_data *pdata;
 191         void __iomem *non_ehci = hcd->regs;
 192         u32 temp;
 193
 194         pdata =
 195             (struct fsl_usb2_platform_data *)hcd->self.controller->
 196             platform_data;
 197         /* Enable PHY interface in the control reg. */
 198         temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 199         out_be32(non_ehci + FSL_SOC_USB_CTRL, temp | 0x00000004);
 200         out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0000001b);
 201
 202 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
 203         /*
 204          * Turn on cache snooping hardware, since some PowerPC platforms
 205          * wholly rely on hardware to deal with cache coherent
 206          */
 207
 208         /* Setup Snooping for all the 4GB space */
 209         /* SNOOP1 starts from 0x0, size 2G */
 210         out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
 211         /* SNOOP2 starts from 0x80000000, size 2G */
 212         out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
 213 #endif
 214
 215         if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
 216                         (pdata->operating_mode == FSL_USB2_DR_OTG))
 217                 mpc83xx_setup_phy(ehci, pdata->phy_mode, 0);
 218
 219         if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
 220                 unsigned int chip, rev, svr;
 221
 222                 svr = mfspr(SPRN_SVR);
 223                 chip = svr >> 16;
 224                 rev = (svr >> 4) & 0xf;
 225
 226                 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
 227                 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
 228                         ehci->has_fsl_port_bug = 1;
 229
 230                 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
 231                         mpc83xx_setup_phy(ehci, pdata->phy_mode, 0);
 232                 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
 233                         mpc83xx_setup_phy(ehci, pdata->phy_mode, 1);
 234         }
 235
 236         /* put controller in host mode. */
 237         ehci_writel(ehci, 0x00000003, non_ehci + FSL_SOC_USB_USBMODE);
 238 #ifdef CONFIG_PPC_85xx
 239         out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
 240         out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
 241 #else
 242         out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
 243         out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
 244 #endif
 245         out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
 246 }
 247
 248 /* called after powerup, by probe or system-pm "wakeup" */
 249 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
 250 {
 251         mpc83xx_usb_setup(ehci_to_hcd(ehci));
 252         ehci_port_power(ehci, 0);
 253
 254         return 0;
 255 }
 256
 257 /* called during probe() after chip reset completes */
 258 static int ehci_fsl_setup(struct usb_hcd *hcd)
 259 {
 260         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 261         int retval;
 262
 263         /* EHCI registers start at offset 0x100 */
 264         ehci->caps = hcd->regs + 0x100;
 265         ehci->regs = hcd->regs + 0x100 +
 266             HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
 267         dbg_hcs_params(ehci, "reset");
 268         dbg_hcc_params(ehci, "reset");
 269
 270         /* cache this readonly data; minimize chip reads */
 271         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 272
 273         retval = ehci_halt(ehci);
 274         if (retval)
 275                 return retval;
 276
 277         /* data structure init */
 278         retval = ehci_init(hcd);
 279         if (retval)
 280                 return retval;
 281
 282         hcd->has_tt = 1;
 283
 284         ehci->sbrn = 0x20;
 285
 286         ehci_reset(ehci);
 287
 288         retval = ehci_fsl_reinit(ehci);
 289         return retval;
 290 }
 291
 292 struct ehci_fsl {
 293         struct ehci_hcd ehci;
 294
 295 #ifdef CONFIG_PM
 296         /* Saved USB PHY settings, need to restore after deep sleep. */
 297         u32 usb_ctrl;
 298 #endif
 299 };
 300
 301 #ifdef CONFIG_PM
 302
 303 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
 304 {
 305         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 306
 307         return container_of(ehci, struct ehci_fsl, ehci);
 308 }
 309
 310 static int ehci_fsl_drv_suspend(struct device *dev)
 311 {
 312         struct usb_hcd *hcd = dev_get_drvdata(dev);
 313         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 314         void __iomem *non_ehci = hcd->regs;
 315
 316         ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd));
 317         if (!fsl_deep_sleep())
 318                 return 0;
 319
 320         ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 321         return 0;
 322 }
 323
 324 static int ehci_fsl_drv_resume(struct device *dev)
 325 {
 326         struct usb_hcd *hcd = dev_get_drvdata(dev);
 327         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 328         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 329         void __iomem *non_ehci = hcd->regs;
 330
 331         ehci_prepare_ports_for_controller_resume(ehci);
 332         if (!fsl_deep_sleep())
 333                 return 0;
 334
 335         usb_root_hub_lost_power(hcd->self.root_hub);
 336
 337         /* Restore USB PHY settings and enable the controller. */
 338         out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
 339
 340         ehci_reset(ehci);
 341         ehci_fsl_reinit(ehci);
 342
 343         return 0;
 344 }
 345
 346 static int ehci_fsl_drv_restore(struct device *dev)
 347 {
 348         struct usb_hcd *hcd = dev_get_drvdata(dev);
 349
 350         usb_root_hub_lost_power(hcd->self.root_hub);
 351         return 0;
 352 }
 353
 354 static struct dev_pm_ops ehci_fsl_pm_ops = {
 355         .suspend = ehci_fsl_drv_suspend,
 356         .resume = ehci_fsl_drv_resume,
 357         .restore = ehci_fsl_drv_restore,
 358 };
 359
 360 #define EHCI_FSL_PM_OPS         (&ehci_fsl_pm_ops)
 361 #else
 362 #define EHCI_FSL_PM_OPS         NULL
 363 #endif /* CONFIG_PM */
 364
 365 static const struct hc_driver ehci_fsl_hc_driver = {
 366         .description = hcd_name,
 367         .product_desc = "Freescale On-Chip EHCI Host Controller",
 368         .hcd_priv_size = sizeof(struct ehci_fsl),
 369
 370         /*
 371          * generic hardware linkage
 372          */
 373         .irq = ehci_irq,
 374         .flags = HCD_USB2,
 375
 376         /*
 377          * basic lifecycle operations
 378          */
 379         .reset = ehci_fsl_setup,
 380         .start = ehci_run,
 381         .stop = ehci_stop,
 382         .shutdown = ehci_shutdown,
 383
 384         /*
 385          * managing i/o requests and associated device resources
 386          */
 387         .urb_enqueue = ehci_urb_enqueue,
 388         .urb_dequeue = ehci_urb_dequeue,
 389         .endpoint_disable = ehci_endpoint_disable,
 390         .endpoint_reset = ehci_endpoint_reset,
 391
 392         /*
 393          * scheduling support
 394          */
 395         .get_frame_number = ehci_get_frame,
 396
 397         /*
 398          * root hub support
 399          */
 400         .hub_status_data = ehci_hub_status_data,
 401         .hub_control = ehci_hub_control,
 402         .bus_suspend = ehci_bus_suspend,
 403         .bus_resume = ehci_bus_resume,
 404         .relinquish_port = ehci_relinquish_port,
 405         .port_handed_over = ehci_port_handed_over,
 406
 407         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 408 };
 409
 410 static int ehci_fsl_drv_probe(struct platform_device *pdev)
 411 {
 412         if (usb_disabled())
 413                 return -ENODEV;
 414
 415         /* FIXME we only want one one probe() not two */
 416         return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
 417 }
 418
 419 static int ehci_fsl_drv_remove(struct platform_device *pdev)
 420 {
 421         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 422
 423         /* FIXME we only want one one remove() not two */
 424         usb_hcd_fsl_remove(hcd, pdev);
 425         return 0;
 426 }
 427
 428 MODULE_ALIAS("platform:fsl-ehci");
 429
 430 static struct platform_driver ehci_fsl_driver = {
 431         .probe = ehci_fsl_drv_probe,
 432         .remove = ehci_fsl_drv_remove,
 433         .shutdown = usb_hcd_platform_shutdown,
 434         .driver = {
 435                 .name = "fsl-ehci",
 436                 .pm = EHCI_FSL_PM_OPS,
 437         },
 438 };