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         ehci_reset(ehci);
 109         retval = ehci_halt(ehci);
 110         if (retval)
 111                 return retval;
 112
 113         /*
 114          * data structure init
 115          */
 116         retval = ehci_init(hcd);
 117         if (retval)
 118                 return retval;
 119
 120         hcd->has_tt = 1;
 121
 122         ehci_port_power(ehci, 0);
 123
 124         return retval;
 125 }
 126
 127 static const struct hc_driver ehci_orion_hc_driver = {
 128         .description = hcd_name,
 129         .product_desc = "Marvell Orion EHCI",
 130         .hcd_priv_size = sizeof(struct ehci_hcd),
 131
 132         /*
 133          * generic hardware linkage
 134          */
 135         .irq = ehci_irq,
 136         .flags = HCD_MEMORY | HCD_USB2,
 137
 138         /*
 139          * basic lifecycle operations
 140          */
 141         .reset = ehci_orion_setup,
 142         .start = ehci_run,
 143         .stop = ehci_stop,
 144         .shutdown = ehci_shutdown,
 145
 146         /*
 147          * managing i/o requests and associated device resources
 148          */
 149         .urb_enqueue = ehci_urb_enqueue,
 150         .urb_dequeue = ehci_urb_dequeue,
 151         .endpoint_disable = ehci_endpoint_disable,
 152         .endpoint_reset = ehci_endpoint_reset,
 153
 154         /*
 155          * scheduling support
 156          */
 157         .get_frame_number = ehci_get_frame,
 158
 159         /*
 160          * root hub support
 161          */
 162         .hub_status_data = ehci_hub_status_data,
 163         .hub_control = ehci_hub_control,
 164         .bus_suspend = ehci_bus_suspend,
 165         .bus_resume = ehci_bus_resume,
 166         .relinquish_port = ehci_relinquish_port,
 167         .port_handed_over = ehci_port_handed_over,
 168
 169         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 170 };
 171
 172 static void __init
 173 ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
 174                                 struct mbus_dram_target_info *dram)
 175 {
 176         int i;
 177
 178         for (i = 0; i < 4; i++) {
 179                 wrl(USB_WINDOW_CTRL(i), 0);
 180                 wrl(USB_WINDOW_BASE(i), 0);
 181         }
 182
 183         for (i = 0; i < dram->num_cs; i++) {
 184                 struct mbus_dram_window *cs = dram->cs + i;
 185
 186                 wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |
 187                                         (cs->mbus_attr << 8) |
 188                                         (dram->mbus_dram_target_id << 4) | 1);
 189                 wrl(USB_WINDOW_BASE(i), cs->base);
 190         }
 191 }
 192
 193 static int __devinit ehci_orion_drv_probe(struct platform_device *pdev)
 194 {
 195         struct orion_ehci_data *pd = pdev->dev.platform_data;
 196         struct resource *res;
 197         struct usb_hcd *hcd;
 198         struct ehci_hcd *ehci;
 199         void __iomem *regs;
 200         int irq, err;
 201
 202         if (usb_disabled())
 203                 return -ENODEV;
 204
 205         pr_debug("Initializing Orion-SoC USB Host Controller\n");
 206
 207         irq = platform_get_irq(pdev, 0);
 208         if (irq <= 0) {
 209                 dev_err(&pdev->dev,
 210                         "Found HC with no IRQ. Check %s setup!\n",
 211                         dev_name(&pdev->dev));
 212                 err = -ENODEV;
 213                 goto err1;
 214         }
 215
 216         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 217         if (!res) {
 218                 dev_err(&pdev->dev,
 219                         "Found HC with no register addr. Check %s setup!\n",
 220                         dev_name(&pdev->dev));
 221                 err = -ENODEV;
 222                 goto err1;
 223         }
 224
 225         if (!request_mem_region(res->start, resource_size(res),
 226                                 ehci_orion_hc_driver.description)) {
 227                 dev_dbg(&pdev->dev, "controller already in use\n");
 228                 err = -EBUSY;
 229                 goto err1;
 230         }
 231
 232         regs = ioremap(res->start, resource_size(res));
 233         if (regs == NULL) {
 234                 dev_dbg(&pdev->dev, "error mapping memory\n");
 235                 err = -EFAULT;
 236                 goto err2;
 237         }
 238
 239         hcd = usb_create_hcd(&ehci_orion_hc_driver,
 240                         &pdev->dev, dev_name(&pdev->dev));
 241         if (!hcd) {
 242                 err = -ENOMEM;
 243                 goto err3;
 244         }
 245
 246         hcd->rsrc_start = res->start;
 247         hcd->rsrc_len = resource_size(res);
 248         hcd->regs = regs;
 249
 250         ehci = hcd_to_ehci(hcd);
 251         ehci->caps = hcd->regs + 0x100;
 252         ehci->regs = hcd->regs + 0x100 +
 253                 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
 254         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 255         hcd->has_tt = 1;
 256         ehci->sbrn = 0x20;
 257
 258         /*
 259          * (Re-)program MBUS remapping windows if we are asked to.
 260          */
 261         if (pd != NULL && pd->dram != NULL)
 262                 ehci_orion_conf_mbus_windows(hcd, pd->dram);
 263
 264         /*
 265          * setup Orion USB controller.
 266          */
 267         switch (pd->phy_version) {
 268         case EHCI_PHY_NA:       /* dont change USB phy settings */
 269                 break;
 270         case EHCI_PHY_ORION:
 271                 orion_usb_phy_v1_setup(hcd);
 272                 break;
 273         case EHCI_PHY_DD:
 274         case EHCI_PHY_KW:
 275         default:
 276                 printk(KERN_WARNING "Orion ehci -USB phy version isn't supported.\n");
 277         }
 278
 279         err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED);
 280         if (err)
 281                 goto err4;
 282
 283         return 0;
 284
 285 err4:
 286         usb_put_hcd(hcd);
 287 err3:
 288         iounmap(regs);
 289 err2:
 290         release_mem_region(res->start, resource_size(res));
 291 err1:
 292         dev_err(&pdev->dev, "init %s fail, %d\n",
 293                 dev_name(&pdev->dev), err);
 294
 295         return err;
 296 }
 297
 298 static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
 299 {
 300         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 301
 302         usb_remove_hcd(hcd);
 303         iounmap(hcd->regs);
 304         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 305         usb_put_hcd(hcd);
 306
 307         return 0;
 308 }
 309
 310 MODULE_ALIAS("platform:orion-ehci");
 311
 312 static struct platform_driver ehci_orion_driver = {
 313         .probe          = ehci_orion_drv_probe,
 314         .remove         = __exit_p(ehci_orion_drv_remove),
 315         .shutdown       = usb_hcd_platform_shutdown,
 316         .driver.name    = "orion-ehci",
 317 };