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 <asm/arch/orion.h>
  15
  16 #define rdl(off)        __raw_readl(hcd->regs + (off))
  17 #define wrl(off, val)   __raw_writel((val), hcd->regs + (off))
  18
  19 #define USB_CAUSE               0x310
  20 #define USB_MASK                0x314
  21 #define USB_CMD                 0x140
  22 #define USB_MODE                0x1a8
  23 #define USB_IPG                 0x360
  24 #define USB_PHY_PWR_CTRL        0x400
  25 #define USB_PHY_TX_CTRL         0x420
  26 #define USB_PHY_RX_CTRL         0x430
  27 #define USB_PHY_IVREF_CTRL      0x440
  28 #define USB_PHY_TST_GRP_CTRL    0x450
  29
  30 /*
  31  * Implement Orion USB controller specification guidelines
  32  */
  33 static void orion_usb_setup(struct usb_hcd *hcd)
  34 {
  35         /*
  36          * Clear interrupt cause and mask
  37          */
  38         wrl(USB_CAUSE, 0);
  39         wrl(USB_MASK, 0);
  40
  41         /*
  42          * Reset controller
  43          */
  44         wrl(USB_CMD, rdl(USB_CMD) | 0x2);
  45         while (rdl(USB_CMD) & 0x2);
  46
  47         /*
  48          * GL# USB-10: Set IPG for non start of frame packets
  49          * Bits[14:8]=0xc
  50          */
  51         wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00);
  52
  53         /*
  54          * GL# USB-9: USB 2.0 Power Control
  55          * BG_VSEL[7:6]=0x1
  56          */
  57         wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40);
  58
  59         /*
  60          * GL# USB-1: USB PHY Tx Control - force calibration to '8'
  61          * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8
  62          */
  63         wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040);
  64
  65         /*
  66          * GL# USB-3 GL# USB-9: USB PHY Rx Control
  67          * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0,
  68          * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1
  69          */
  70         wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010);
  71
  72         /*
  73          * GL# USB-3 GL# USB-9: USB PHY IVREF Control
  74          * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0
  75          */
  76         wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32);
  77
  78         /*
  79          * GL# USB-3 GL# USB-9: USB PHY Test Group Control
  80          * REG_FIFO_SQ_RST[15]=0
  81          */
  82         wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000);
  83
  84         /*
  85          * Stop and reset controller
  86          */
  87         wrl(USB_CMD, rdl(USB_CMD) & ~0x1);
  88         wrl(USB_CMD, rdl(USB_CMD) | 0x2);
  89         while (rdl(USB_CMD) & 0x2);
  90
  91         /*
  92          * GL# USB-5 Streaming disable REG_USB_MODE[4]=1
  93          * TBD: This need to be done after each reset!
  94          * GL# USB-4 Setup USB Host mode
  95          */
  96         wrl(USB_MODE, 0x13);
  97 }
  98
  99 static int ehci_orion_setup(struct usb_hcd *hcd)
 100 {
 101         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 102         int retval;
 103
 104         retval = ehci_halt(ehci);
 105         if (retval)
 106                 return retval;
 107
 108         /*
 109          * data structure init
 110          */
 111         retval = ehci_init(hcd);
 112         if (retval)
 113                 return retval;
 114
 115         ehci_reset(ehci);
 116         ehci_port_power(ehci, 0);
 117
 118         return retval;
 119 }
 120
 121 static const struct hc_driver ehci_orion_hc_driver = {
 122         .description = hcd_name,
 123         .product_desc = "Marvell Orion EHCI",
 124         .hcd_priv_size = sizeof(struct ehci_hcd),
 125
 126         /*
 127          * generic hardware linkage
 128          */
 129         .irq = ehci_irq,
 130         .flags = HCD_MEMORY | HCD_USB2,
 131
 132         /*
 133          * basic lifecycle operations
 134          */
 135         .reset = ehci_orion_setup,
 136         .start = ehci_run,
 137 #ifdef CONFIG_PM
 138         .suspend = ehci_bus_suspend,
 139         .resume = ehci_bus_resume,
 140 #endif
 141         .stop = ehci_stop,
 142         .shutdown = ehci_shutdown,
 143
 144         /*
 145          * managing i/o requests and associated device resources
 146          */
 147         .urb_enqueue = ehci_urb_enqueue,
 148         .urb_dequeue = ehci_urb_dequeue,
 149         .endpoint_disable = ehci_endpoint_disable,
 150
 151         /*
 152          * scheduling support
 153          */
 154         .get_frame_number = ehci_get_frame,
 155
 156         /*
 157          * root hub support
 158          */
 159         .hub_status_data = ehci_hub_status_data,
 160         .hub_control = ehci_hub_control,
 161         .bus_suspend = ehci_bus_suspend,
 162         .bus_resume = ehci_bus_resume,
 163 };
 164
 165 static int __init ehci_orion_drv_probe(struct platform_device *pdev)
 166 {
 167         struct resource *res;
 168         struct usb_hcd *hcd;
 169         struct ehci_hcd *ehci;
 170         void __iomem *regs;
 171         int irq, err;
 172
 173         if (usb_disabled())
 174                 return -ENODEV;
 175
 176         pr_debug("Initializing Orion-SoC USB Host Controller\n");
 177
 178         irq = platform_get_irq(pdev, 0);
 179         if (irq <= 0) {
 180                 dev_err(&pdev->dev,
 181                         "Found HC with no IRQ. Check %s setup!\n",
 182                         pdev->dev.bus_id);
 183                 err = -ENODEV;
 184                 goto err1;
 185         }
 186
 187         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 188         if (!res) {
 189                 dev_err(&pdev->dev,
 190                         "Found HC with no register addr. Check %s setup!\n",
 191                         pdev->dev.bus_id);
 192                 err = -ENODEV;
 193                 goto err1;
 194         }
 195
 196         if (!request_mem_region(res->start, res->end - res->start + 1,
 197                                 ehci_orion_hc_driver.description)) {
 198                 dev_dbg(&pdev->dev, "controller already in use\n");
 199                 err = -EBUSY;
 200                 goto err1;
 201         }
 202
 203         regs = ioremap(res->start, res->end - res->start + 1);
 204         if (regs == NULL) {
 205                 dev_dbg(&pdev->dev, "error mapping memory\n");
 206                 err = -EFAULT;
 207                 goto err2;
 208         }
 209
 210         hcd = usb_create_hcd(&ehci_orion_hc_driver,
 211                         &pdev->dev, pdev->dev.bus_id);
 212         if (!hcd) {
 213                 err = -ENOMEM;
 214                 goto err3;
 215         }
 216
 217         hcd->rsrc_start = res->start;
 218         hcd->rsrc_len = res->end - res->start + 1;
 219         hcd->regs = regs;
 220
 221         ehci = hcd_to_ehci(hcd);
 222         ehci->caps = hcd->regs + 0x100;
 223         ehci->regs = hcd->regs + 0x100 +
 224                 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
 225         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 226         ehci->is_tdi_rh_tt = 1;
 227         ehci->sbrn = 0x20;
 228
 229         /*
 230          * setup Orion USB controller
 231          */
 232         orion_usb_setup(hcd);
 233
 234         err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED);
 235         if (err)
 236                 goto err4;
 237
 238         return 0;
 239
 240 err4:
 241         usb_put_hcd(hcd);
 242 err3:
 243         iounmap(regs);
 244 err2:
 245         release_mem_region(res->start, res->end - res->start + 1);
 246 err1:
 247         dev_err(&pdev->dev, "init %s fail, %d\n",
 248                 pdev->dev.bus_id, err);
 249
 250         return err;
 251 }
 252
 253 static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
 254 {
 255         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 256
 257         usb_remove_hcd(hcd);
 258         iounmap(hcd->regs);
 259         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 260         usb_put_hcd(hcd);
 261
 262         return 0;
 263 }
 264
 265 MODULE_ALIAS("platform:orion-ehci");
 266
 267 static struct platform_driver ehci_orion_driver = {
 268         .probe          = ehci_orion_drv_probe,
 269         .remove         = __exit_p(ehci_orion_drv_remove),
 270         .shutdown       = usb_hcd_platform_shutdown,
 271         .driver.name    = "orion-ehci",
 272 };