drivers/usb/host/ehci-fsl.c

   1 /*
   2  * (C) Copyright David Brownell 2000-2002
   3  * Copyright (c) 2005 MontaVista Software
   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  */
  22
  23 #include <linux/platform_device.h>
  24 #include <linux/fsl_devices.h>
  25
  26 #include "ehci-fsl.h"
  27
  28 /* FIXME: Power Managment is un-ported so temporarily disable it */
  29 #undef CONFIG_PM
  30
  31 /* PCI-based HCs are common, but plenty of non-PCI HCs are used too */
  32
  33 /* configure so an HC device and id are always provided */
  34 /* always called with process context; sleeping is OK */
  35
  36 /**
  37  * usb_hcd_fsl_probe - initialize FSL-based HCDs
  38  * @drvier: Driver to be used for this HCD
  39  * @pdev: USB Host Controller being probed
  40  * Context: !in_interrupt()
  41  *
  42  * Allocates basic resources for this USB host controller.
  43  *
  44  */
  45 int usb_hcd_fsl_probe(const struct hc_driver *driver,
  46                       struct platform_device *pdev)
  47 {
  48         struct fsl_usb2_platform_data *pdata;
  49         struct usb_hcd *hcd;
  50         struct resource *res;
  51         int irq;
  52         int retval;
  53         unsigned int temp;
  54
  55         pr_debug("initializing FSL-SOC USB Controller\n");
  56
  57         /* Need platform data for setup */
  58         pdata = (struct fsl_usb2_platform_data *)pdev->dev.platform_data;
  59         if (!pdata) {
  60                 dev_err(&pdev->dev,
  61                         "No platform data for %s.\n", pdev->dev.bus_id);
  62                 return -ENODEV;
  63         }
  64
  65         /*
  66          * This is a host mode driver, verify that we're supposed to be
  67          * in host mode.
  68          */
  69         if (!((pdata->operating_mode == FSL_USB2_DR_HOST) ||
  70               (pdata->operating_mode == FSL_USB2_MPH_HOST))) {
  71                 dev_err(&pdev->dev,
  72                         "Non Host Mode configured for %s. Wrong driver linked.\n",
  73                         pdev->dev.bus_id);
  74                 return -ENODEV;
  75         }
  76
  77         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  78         if (!res) {
  79                 dev_err(&pdev->dev,
  80                         "Found HC with no IRQ. Check %s setup!\n",
  81                         pdev->dev.bus_id);
  82                 return -ENODEV;
  83         }
  84         irq = res->start;
  85
  86         hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
  87         if (!hcd) {
  88                 retval = -ENOMEM;
  89                 goto err1;
  90         }
  91
  92         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  93         if (!res) {
  94                 dev_err(&pdev->dev,
  95                         "Found HC with no register addr. Check %s setup!\n",
  96                         pdev->dev.bus_id);
  97                 retval = -ENODEV;
  98                 goto err2;
  99         }
 100         hcd->rsrc_start = res->start;
 101         hcd->rsrc_len = res->end - res->start + 1;
 102         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
 103                                 driver->description)) {
 104                 dev_dbg(&pdev->dev, "controller already in use\n");
 105                 retval = -EBUSY;
 106                 goto err2;
 107         }
 108         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 109
 110         if (hcd->regs == NULL) {
 111                 dev_dbg(&pdev->dev, "error mapping memory\n");
 112                 retval = -EFAULT;
 113                 goto err3;
 114         }
 115
 116         /* Enable USB controller */
 117         temp = in_be32(hcd->regs + 0x500);
 118         out_be32(hcd->regs + 0x500, temp | 0x4);
 119
 120         /* Set to Host mode */
 121         temp = in_le32(hcd->regs + 0x1a8);
 122         out_le32(hcd->regs + 0x1a8, temp | 0x3);
 123
 124         retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
 125         if (retval != 0)
 126                 goto err4;
 127         return retval;
 128
 129       err4:
 130         iounmap(hcd->regs);
 131       err3:
 132         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 133       err2:
 134         usb_put_hcd(hcd);
 135       err1:
 136         dev_err(&pdev->dev, "init %s fail, %d\n", pdev->dev.bus_id, retval);
 137         return retval;
 138 }
 139
 140 /* may be called without controller electrically present */
 141 /* may be called with controller, bus, and devices active */
 142
 143 /**
 144  * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs
 145  * @dev: USB Host Controller being removed
 146  * Context: !in_interrupt()
 147  *
 148  * Reverses the effect of usb_hcd_fsl_probe().
 149  *
 150  */
 151 void usb_hcd_fsl_remove(struct usb_hcd *hcd, struct platform_device *pdev)
 152 {
 153         usb_remove_hcd(hcd);
 154         iounmap(hcd->regs);
 155         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 156         usb_put_hcd(hcd);
 157 }
 158
 159 static void mpc83xx_setup_phy(struct ehci_hcd *ehci,
 160                               enum fsl_usb2_phy_modes phy_mode,
 161                               unsigned int port_offset)
 162 {
 163         u32 portsc = 0;
 164         switch (phy_mode) {
 165         case FSL_USB2_PHY_ULPI:
 166                 portsc |= PORT_PTS_ULPI;
 167                 break;
 168         case FSL_USB2_PHY_SERIAL:
 169                 portsc |= PORT_PTS_SERIAL;
 170                 break;
 171         case FSL_USB2_PHY_UTMI_WIDE:
 172                 portsc |= PORT_PTS_PTW;
 173                 /* fall through */
 174         case FSL_USB2_PHY_UTMI:
 175                 portsc |= PORT_PTS_UTMI;
 176                 break;
 177         case FSL_USB2_PHY_NONE:
 178                 break;
 179         }
 180         ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
 181 }
 182
 183 static void mpc83xx_usb_setup(struct usb_hcd *hcd)
 184 {
 185         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 186         struct fsl_usb2_platform_data *pdata;
 187         void __iomem *non_ehci = hcd->regs;
 188
 189         pdata =
 190             (struct fsl_usb2_platform_data *)hcd->self.controller->
 191             platform_data;
 192         /* Enable PHY interface in the control reg. */
 193         out_be32(non_ehci + FSL_SOC_USB_CTRL, 0x00000004);
 194         out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0000001b);
 195
 196         if (pdata->operating_mode == FSL_USB2_DR_HOST)
 197                 mpc83xx_setup_phy(ehci, pdata->phy_mode, 0);
 198
 199         if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
 200                 unsigned int chip, rev, svr;
 201
 202                 svr = mfspr(SPRN_SVR);
 203                 chip = svr >> 16;
 204                 rev = (svr >> 4) & 0xf;
 205
 206                 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
 207                 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
 208                         ehci->has_fsl_port_bug = 1;
 209
 210                 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
 211                         mpc83xx_setup_phy(ehci, pdata->phy_mode, 0);
 212                 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
 213                         mpc83xx_setup_phy(ehci, pdata->phy_mode, 1);
 214         }
 215
 216         /* put controller in host mode. */
 217         ehci_writel(ehci, 0x00000003, non_ehci + FSL_SOC_USB_USBMODE);
 218         out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
 219         out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
 220         out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
 221 }
 222
 223 /* called after powerup, by probe or system-pm "wakeup" */
 224 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
 225 {
 226         mpc83xx_usb_setup(ehci_to_hcd(ehci));
 227         ehci_port_power(ehci, 0);
 228
 229         return 0;
 230 }
 231
 232 /* called during probe() after chip reset completes */
 233 static int ehci_fsl_setup(struct usb_hcd *hcd)
 234 {
 235         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 236         int retval;
 237
 238         /* EHCI registers start at offset 0x100 */
 239         ehci->caps = hcd->regs + 0x100;
 240         ehci->regs = hcd->regs + 0x100 +
 241             HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
 242         dbg_hcs_params(ehci, "reset");
 243         dbg_hcc_params(ehci, "reset");
 244
 245         /* cache this readonly data; minimize chip reads */
 246         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 247
 248         retval = ehci_halt(ehci);
 249         if (retval)
 250                 return retval;
 251
 252         /* data structure init */
 253         retval = ehci_init(hcd);
 254         if (retval)
 255                 return retval;
 256
 257         ehci->is_tdi_rh_tt = 1;
 258
 259         ehci->sbrn = 0x20;
 260
 261         ehci_reset(ehci);
 262
 263         retval = ehci_fsl_reinit(ehci);
 264         return retval;
 265 }
 266
 267 static const struct hc_driver ehci_fsl_hc_driver = {
 268         .description = hcd_name,
 269         .product_desc = "Freescale On-Chip EHCI Host Controller",
 270         .hcd_priv_size = sizeof(struct ehci_hcd),
 271
 272         /*
 273          * generic hardware linkage
 274          */
 275         .irq = ehci_irq,
 276         .flags = HCD_USB2,
 277
 278         /*
 279          * basic lifecycle operations
 280          */
 281         .reset = ehci_fsl_setup,
 282         .start = ehci_run,
 283 #ifdef  CONFIG_PM
 284         .suspend = ehci_bus_suspend,
 285         .resume = ehci_bus_resume,
 286 #endif
 287         .stop = ehci_stop,
 288         .shutdown = ehci_shutdown,
 289
 290         /*
 291          * managing i/o requests and associated device resources
 292          */
 293         .urb_enqueue = ehci_urb_enqueue,
 294         .urb_dequeue = ehci_urb_dequeue,
 295         .endpoint_disable = ehci_endpoint_disable,
 296
 297         /*
 298          * scheduling support
 299          */
 300         .get_frame_number = ehci_get_frame,
 301
 302         /*
 303          * root hub support
 304          */
 305         .hub_status_data = ehci_hub_status_data,
 306         .hub_control = ehci_hub_control,
 307         .bus_suspend = ehci_bus_suspend,
 308         .bus_resume = ehci_bus_resume,
 309 };
 310
 311 static int ehci_fsl_drv_probe(struct platform_device *pdev)
 312 {
 313         if (usb_disabled())
 314                 return -ENODEV;
 315
 316         return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
 317 }
 318
 319 static int ehci_fsl_drv_remove(struct platform_device *pdev)
 320 {
 321         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 322
 323         usb_hcd_fsl_remove(hcd, pdev);
 324
 325         return 0;
 326 }
 327
 328 MODULE_ALIAS("fsl-ehci");
 329
 330 static struct platform_driver ehci_fsl_driver = {
 331         .probe = ehci_fsl_drv_probe,
 332         .remove = ehci_fsl_drv_remove,
 333         .shutdown = usb_hcd_platform_shutdown,
 334         .driver = {
 335                    .name = "fsl-ehci",
 336                    },
 337 };