drivers/usb/host/ehci-orion.c

   1 /*
   2  * drivers/usb/host/ehci-orion.c
   3  *
   4  * Tzachi Perelstein <tzachi@marvell.com>
   5  *
   6  * This file is licensed under  the terms of the GNU General Public
   7  * License version 2. This program is licensed "as is" without any
   8  * warranty of any kind, whether express or implied.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/mbus.h>
  15 #include <asm/plat-orion/ehci-orion.h>
  16
  17 #define rdl(off)        __raw_readl(hcd->regs + (off))
  18 #define wrl(off, val)   __raw_writel((val), hcd->regs + (off))
  19
  20 #define USB_CMD                 0x140
  21 #define USB_MODE                0x1a8
  22 #define USB_CAUSE               0x310
  23 #define USB_MASK                0x314
  24 #define USB_WINDOW_CTRL(i)      (0x320 + ((i) << 4))
  25 #define USB_WINDOW_BASE(i)      (0x324 + ((i) << 4))
  26 #define USB_IPG                 0x360
  27 #define USB_PHY_PWR_CTRL        0x400
  28 #define USB_PHY_TX_CTRL         0x420
  29 #define USB_PHY_RX_CTRL         0x430
  30 #define USB_PHY_IVREF_CTRL      0x440
  31 #define USB_PHY_TST_GRP_CTRL    0x450
  32
  33 /*
  34  * Implement Orion USB controller specification guidelines
  35  */
  36 static void orion_usb_setup(struct usb_hcd *hcd)
  37 {
  38         /*
  39          * Clear interrupt cause and mask
  40          */
  41         wrl(USB_CAUSE, 0);
  42         wrl(USB_MASK, 0);
  43
  44         /*
  45          * Reset controller
  46          */
  47         wrl(USB_CMD, rdl(USB_CMD) | 0x2);
  48         while (rdl(USB_CMD) & 0x2);
  49
  50         /*
  51          * GL# USB-10: Set IPG for non start of frame packets
  52          * Bits[14:8]=0xc
  53          */
  54         wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00);
  55
  56         /*
  57          * GL# USB-9: USB 2.0 Power Control
  58          * BG_VSEL[7:6]=0x1
  59          */
  60         wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40);
  61
  62         /*
  63          * GL# USB-1: USB PHY Tx Control - force calibration to '8'
  64          * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8
  65          */
  66         wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040);
  67
  68         /*
  69          * GL# USB-3 GL# USB-9: USB PHY Rx Control
  70          * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0,
  71          * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1
  72          */
  73         wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010);
  74
  75         /*
  76          * GL# USB-3 GL# USB-9: USB PHY IVREF Control
  77          * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0
  78          */
  79         wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32);
  80
  81         /*
  82          * GL# USB-3 GL# USB-9: USB PHY Test Group Control
  83          * REG_FIFO_SQ_RST[15]=0
  84          */
  85         wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000);
  86
  87         /*
  88          * Stop and reset controller
  89          */
  90         wrl(USB_CMD, rdl(USB_CMD) & ~0x1);
  91         wrl(USB_CMD, rdl(USB_CMD) | 0x2);
  92         while (rdl(USB_CMD) & 0x2);
  93
  94         /*
  95          * GL# USB-5 Streaming disable REG_USB_MODE[4]=1
  96          * TBD: This need to be done after each reset!
  97          * GL# USB-4 Setup USB Host mode
  98          */
  99         wrl(USB_MODE, 0x13);
 100 }
 101
 102 static int ehci_orion_setup(struct usb_hcd *hcd)
 103 {
 104         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 105         int retval;
 106
 107         retval = ehci_halt(ehci);
 108         if (retval)
 109                 return retval;
 110
 111         /*
 112          * data structure init
 113          */
 114         retval = ehci_init(hcd);
 115         if (retval)
 116                 return retval;
 117
 118         hcd->has_tt = 1;
 119
 120         ehci_reset(ehci);
 121         ehci_port_power(ehci, 0);
 122
 123         return retval;
 124 }
 125
 126 static const struct hc_driver ehci_orion_hc_driver = {
 127         .description = hcd_name,
 128         .product_desc = "Marvell Orion EHCI",
 129         .hcd_priv_size = sizeof(struct ehci_hcd),
 130
 131         /*
 132          * generic hardware linkage
 133          */
 134         .irq = ehci_irq,
 135         .flags = HCD_MEMORY | HCD_USB2,
 136
 137         /*
 138          * basic lifecycle operations
 139          */
 140         .reset = ehci_orion_setup,
 141         .start = ehci_run,
 142         .stop = ehci_stop,
 143         .shutdown = ehci_shutdown,
 144
 145         /*
 146          * managing i/o requests and associated device resources
 147          */
 148         .urb_enqueue = ehci_urb_enqueue,
 149         .urb_dequeue = ehci_urb_dequeue,
 150         .endpoint_disable = ehci_endpoint_disable,
 151
 152         /*
 153          * scheduling support
 154          */
 155         .get_frame_number = ehci_get_frame,
 156
 157         /*
 158          * root hub support
 159          */
 160         .hub_status_data = ehci_hub_status_data,
 161         .hub_control = ehci_hub_control,
 162         .bus_suspend = ehci_bus_suspend,
 163         .bus_resume = ehci_bus_resume,
 164         .relinquish_port = ehci_relinquish_port,
 165         .port_handed_over = ehci_port_handed_over,
 166 };
 167
 168 static void __init
 169 ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
 170                                 struct mbus_dram_target_info *dram)
 171 {
 172         int i;
 173
 174         for (i = 0; i < 4; i++) {
 175                 wrl(USB_WINDOW_CTRL(i), 0);
 176                 wrl(USB_WINDOW_BASE(i), 0);
 177         }
 178
 179         for (i = 0; i < dram->num_cs; i++) {
 180                 struct mbus_dram_window *cs = dram->cs + i;
 181
 182                 wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |
 183                                         (cs->mbus_attr << 8) |
 184                                         (dram->mbus_dram_target_id << 4) | 1);
 185                 wrl(USB_WINDOW_BASE(i), cs->base);
 186         }
 187 }
 188
 189 static int __init ehci_orion_drv_probe(struct platform_device *pdev)
 190 {
 191         struct orion_ehci_data *pd = pdev->dev.platform_data;
 192         struct resource *res;
 193         struct usb_hcd *hcd;
 194         struct ehci_hcd *ehci;
 195         void __iomem *regs;
 196         int irq, err;
 197
 198         if (usb_disabled())
 199                 return -ENODEV;
 200
 201         pr_debug("Initializing Orion-SoC USB Host Controller\n");
 202
 203         irq = platform_get_irq(pdev, 0);
 204         if (irq <= 0) {
 205                 dev_err(&pdev->dev,
 206                         "Found HC with no IRQ. Check %s setup!\n",
 207                         dev_name(&pdev->dev));
 208                 err = -ENODEV;
 209                 goto err1;
 210         }
 211
 212         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 213         if (!res) {
 214                 dev_err(&pdev->dev,
 215                         "Found HC with no register addr. Check %s setup!\n",
 216                         dev_name(&pdev->dev));
 217                 err = -ENODEV;
 218                 goto err1;
 219         }
 220
 221         if (!request_mem_region(res->start, res->end - res->start + 1,
 222                                 ehci_orion_hc_driver.description)) {
 223                 dev_dbg(&pdev->dev, "controller already in use\n");
 224                 err = -EBUSY;
 225                 goto err1;
 226         }
 227
 228         regs = ioremap(res->start, res->end - res->start + 1);
 229         if (regs == NULL) {
 230                 dev_dbg(&pdev->dev, "error mapping memory\n");
 231                 err = -EFAULT;
 232                 goto err2;
 233         }
 234
 235         hcd = usb_create_hcd(&ehci_orion_hc_driver,
 236                         &pdev->dev, dev_name(&pdev->dev));
 237         if (!hcd) {
 238                 err = -ENOMEM;
 239                 goto err3;
 240         }
 241
 242         hcd->rsrc_start = res->start;
 243         hcd->rsrc_len = res->end - res->start + 1;
 244         hcd->regs = regs;
 245
 246         ehci = hcd_to_ehci(hcd);
 247         ehci->caps = hcd->regs + 0x100;
 248         ehci->regs = hcd->regs + 0x100 +
 249                 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
 250         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 251         hcd->has_tt = 1;
 252         ehci->sbrn = 0x20;
 253
 254         /*
 255          * (Re-)program MBUS remapping windows if we are asked to.
 256          */
 257         if (pd != NULL && pd->dram != NULL)
 258                 ehci_orion_conf_mbus_windows(hcd, pd->dram);
 259
 260         /*
 261          * setup Orion USB controller
 262          */
 263         orion_usb_setup(hcd);
 264
 265         err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED);
 266         if (err)
 267                 goto err4;
 268
 269         return 0;
 270
 271 err4:
 272         usb_put_hcd(hcd);
 273 err3:
 274         iounmap(regs);
 275 err2:
 276         release_mem_region(res->start, res->end - res->start + 1);
 277 err1:
 278         dev_err(&pdev->dev, "init %s fail, %d\n",
 279                 dev_name(&pdev->dev), err);
 280
 281         return err;
 282 }
 283
 284 static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
 285 {
 286         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 287
 288         usb_remove_hcd(hcd);
 289         iounmap(hcd->regs);
 290         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 291         usb_put_hcd(hcd);
 292
 293         return 0;
 294 }
 295
 296 MODULE_ALIAS("platform:orion-ehci");
 297
 298 static struct platform_driver ehci_orion_driver = {
 299         .probe          = ehci_orion_drv_probe,
 300         .remove         = __exit_p(ehci_orion_drv_remove),
 301         .shutdown       = usb_hcd_platform_shutdown,
 302         .driver.name    = "orion-ehci",
 303 };