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 <plat/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_phy_v1_setup(struct usb_hcd *hcd)
  37 {
  38         /* The below GLs are according to the Orion Errata document */
  39         /*
  40          * Clear interrupt cause and mask
  41          */
  42         wrl(USB_CAUSE, 0);
  43         wrl(USB_MASK, 0);
  44
  45         /*
  46          * Reset controller
  47          */
  48         wrl(USB_CMD, rdl(USB_CMD) | 0x2);
  49         while (rdl(USB_CMD) & 0x2);
  50
  51         /*
  52          * GL# USB-10: Set IPG for non start of frame packets
  53          * Bits[14:8]=0xc
  54          */
  55         wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00);
  56
  57         /*
  58          * GL# USB-9: USB 2.0 Power Control
  59          * BG_VSEL[7:6]=0x1
  60          */
  61         wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40);
  62
  63         /*
  64          * GL# USB-1: USB PHY Tx Control - force calibration to '8'
  65          * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8
  66          */
  67         wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040);
  68
  69         /*
  70          * GL# USB-3 GL# USB-9: USB PHY Rx Control
  71          * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0,
  72          * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1
  73          */
  74         wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010);
  75
  76         /*
  77          * GL# USB-3 GL# USB-9: USB PHY IVREF Control
  78          * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0
  79          */
  80         wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32);
  81
  82         /*
  83          * GL# USB-3 GL# USB-9: USB PHY Test Group Control
  84          * REG_FIFO_SQ_RST[15]=0
  85          */
  86         wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000);
  87
  88         /*
  89          * Stop and reset controller
  90          */
  91         wrl(USB_CMD, rdl(USB_CMD) & ~0x1);
  92         wrl(USB_CMD, rdl(USB_CMD) | 0x2);
  93         while (rdl(USB_CMD) & 0x2);
  94
  95         /*
  96          * GL# USB-5 Streaming disable REG_USB_MODE[4]=1
  97          * TBD: This need to be done after each reset!
  98          * GL# USB-4 Setup USB Host mode
  99          */
 100         wrl(USB_MODE, 0x13);
 101 }
 102
 103 static int ehci_orion_setup(struct usb_hcd *hcd)
 104 {
 105         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 106         int retval;
 107
 108         hcd->has_tt = 1;
 109
 110         retval = ehci_halt(ehci);
 111         if (retval)
 112                 return retval;
 113
 114         /*
 115          * data structure init
 116          */
 117         retval = ehci_init(hcd);
 118         if (retval)
 119                 return retval;
 120
 121         ehci_reset(ehci);
 122
 123         ehci_port_power(ehci, 0);
 124
 125         return retval;
 126 }
 127
 128 static const struct hc_driver ehci_orion_hc_driver = {
 129         .description = hcd_name,
 130         .product_desc = "Marvell Orion EHCI",
 131         .hcd_priv_size = sizeof(struct ehci_hcd),
 132
 133         /*
 134          * generic hardware linkage
 135          */
 136         .irq = ehci_irq,
 137         .flags = HCD_MEMORY | HCD_USB2,
 138
 139         /*
 140          * basic lifecycle operations
 141          */
 142         .reset = ehci_orion_setup,
 143         .start = ehci_run,
 144         .stop = ehci_stop,
 145         .shutdown = ehci_shutdown,
 146
 147         /*
 148          * managing i/o requests and associated device resources
 149          */
 150         .urb_enqueue = ehci_urb_enqueue,
 151         .urb_dequeue = ehci_urb_dequeue,
 152         .endpoint_disable = ehci_endpoint_disable,
 153         .endpoint_reset = ehci_endpoint_reset,
 154
 155         /*
 156          * scheduling support
 157          */
 158         .get_frame_number = ehci_get_frame,
 159
 160         /*
 161          * root hub support
 162          */
 163         .hub_status_data = ehci_hub_status_data,
 164         .hub_control = ehci_hub_control,
 165         .bus_suspend = ehci_bus_suspend,
 166         .bus_resume = ehci_bus_resume,
 167         .relinquish_port = ehci_relinquish_port,
 168         .port_handed_over = ehci_port_handed_over,
 169
 170         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 171 };
 172
 173 static void __init
 174 ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
 175                                 struct mbus_dram_target_info *dram)
 176 {
 177         int i;
 178
 179         for (i = 0; i < 4; i++) {
 180                 wrl(USB_WINDOW_CTRL(i), 0);
 181                 wrl(USB_WINDOW_BASE(i), 0);
 182         }
 183
 184         for (i = 0; i < dram->num_cs; i++) {
 185                 struct mbus_dram_window *cs = dram->cs + i;
 186
 187                 wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |
 188                                         (cs->mbus_attr << 8) |
 189                                         (dram->mbus_dram_target_id << 4) | 1);
 190                 wrl(USB_WINDOW_BASE(i), cs->base);
 191         }
 192 }
 193
 194 static int __devinit ehci_orion_drv_probe(struct platform_device *pdev)
 195 {
 196         struct orion_ehci_data *pd = pdev->dev.platform_data;
 197         struct resource *res;
 198         struct usb_hcd *hcd;
 199         struct ehci_hcd *ehci;
 200         void __iomem *regs;
 201         int irq, err;
 202
 203         if (usb_disabled())
 204                 return -ENODEV;
 205
 206         pr_debug("Initializing Orion-SoC USB Host Controller\n");
 207
 208         irq = platform_get_irq(pdev, 0);
 209         if (irq <= 0) {
 210                 dev_err(&pdev->dev,
 211                         "Found HC with no IRQ. Check %s setup!\n",
 212                         dev_name(&pdev->dev));
 213                 err = -ENODEV;
 214                 goto err1;
 215         }
 216
 217         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 218         if (!res) {
 219                 dev_err(&pdev->dev,
 220                         "Found HC with no register addr. Check %s setup!\n",
 221                         dev_name(&pdev->dev));
 222                 err = -ENODEV;
 223                 goto err1;
 224         }
 225
 226         if (!request_mem_region(res->start, resource_size(res),
 227                                 ehci_orion_hc_driver.description)) {
 228                 dev_dbg(&pdev->dev, "controller already in use\n");
 229                 err = -EBUSY;
 230                 goto err1;
 231         }
 232
 233         regs = ioremap(res->start, resource_size(res));
 234         if (regs == NULL) {
 235                 dev_dbg(&pdev->dev, "error mapping memory\n");
 236                 err = -EFAULT;
 237                 goto err2;
 238         }
 239
 240         hcd = usb_create_hcd(&ehci_orion_hc_driver,
 241                         &pdev->dev, dev_name(&pdev->dev));
 242         if (!hcd) {
 243                 err = -ENOMEM;
 244                 goto err3;
 245         }
 246
 247         hcd->rsrc_start = res->start;
 248         hcd->rsrc_len = resource_size(res);
 249         hcd->regs = regs;
 250
 251         ehci = hcd_to_ehci(hcd);
 252         ehci->caps = hcd->regs + 0x100;
 253         ehci->regs = hcd->regs + 0x100 +
 254                 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 255         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 256         hcd->has_tt = 1;
 257         ehci->sbrn = 0x20;
 258
 259         /*
 260          * (Re-)program MBUS remapping windows if we are asked to.
 261          */
 262         if (pd != NULL && pd->dram != NULL)
 263                 ehci_orion_conf_mbus_windows(hcd, pd->dram);
 264
 265         /*
 266          * setup Orion USB controller.
 267          */
 268         switch (pd->phy_version) {
 269         case EHCI_PHY_NA:       /* dont change USB phy settings */
 270                 break;
 271         case EHCI_PHY_ORION:
 272                 orion_usb_phy_v1_setup(hcd);
 273                 break;
 274         case EHCI_PHY_DD:
 275         case EHCI_PHY_KW:
 276         default:
 277                 printk(KERN_WARNING "Orion ehci -USB phy version isn't supported.\n");
 278         }
 279
 280         err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 281         if (err)
 282                 goto err4;
 283
 284         return 0;
 285
 286 err4:
 287         usb_put_hcd(hcd);
 288 err3:
 289         iounmap(regs);
 290 err2:
 291         release_mem_region(res->start, resource_size(res));
 292 err1:
 293         dev_err(&pdev->dev, "init %s fail, %d\n",
 294                 dev_name(&pdev->dev), err);
 295
 296         return err;
 297 }
 298
 299 static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
 300 {
 301         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 302
 303         usb_remove_hcd(hcd);
 304         iounmap(hcd->regs);
 305         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 306         usb_put_hcd(hcd);
 307
 308         return 0;
 309 }
 310
 311 MODULE_ALIAS("platform:orion-ehci");
 312
 313 static struct platform_driver ehci_orion_driver = {
 314         .probe          = ehci_orion_drv_probe,
 315         .remove         = __exit_p(ehci_orion_drv_remove),
 316         .shutdown       = usb_hcd_platform_shutdown,
 317         .driver.name    = "orion-ehci",
 318 };