LXR linux/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 */
  36static 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
 103static 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
 128static 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
 173static void __init
 174ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
 175                             const 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                const 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
 194static int __devinit ehci_orion_drv_probe(struct platform_device *pdev)
 195{
 196        struct orion_ehci_data *pd = pdev->dev.platform_data;
 197        const struct mbus_dram_target_info *dram;
 198        struct resource *res;
 199        struct usb_hcd *hcd;
 200        struct ehci_hcd *ehci;
 201        void __iomem *regs;
 202        int irq, err;
 203
 204        if (usb_disabled())
 205                return -ENODEV;
 206
 207        pr_debug("Initializing Orion-SoC USB Host Controller\n");
 208
 209        irq = platform_get_irq(pdev, 0);
 210        if (irq <= 0) {
 211                dev_err(&pdev->dev,
 212                        "Found HC with no IRQ. Check %s setup!\n",
 213                        dev_name(&pdev->dev));
 214                err = -ENODEV;
 215                goto err1;
 216        }
 217
 218        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 219        if (!res) {
 220                dev_err(&pdev->dev,
 221                        "Found HC with no register addr. Check %s setup!\n",
 222                        dev_name(&pdev->dev));
 223                err = -ENODEV;
 224                goto err1;
 225        }
 226
 227        if (!request_mem_region(res->start, resource_size(res),
 228                                ehci_orion_hc_driver.description)) {
 229                dev_dbg(&pdev->dev, "controller already in use\n");
 230                err = -EBUSY;
 231                goto err1;
 232        }
 233
 234        regs = ioremap(res->start, resource_size(res));
 235        if (regs == NULL) {
 236                dev_dbg(&pdev->dev, "error mapping memory\n");
 237                err = -EFAULT;
 238                goto err2;
 239        }
 240
 241        hcd = usb_create_hcd(&ehci_orion_hc_driver,
 242                        &pdev->dev, dev_name(&pdev->dev));
 243        if (!hcd) {
 244                err = -ENOMEM;
 245                goto err3;
 246        }
 247
 248        hcd->rsrc_start = res->start;
 249        hcd->rsrc_len = resource_size(res);
 250        hcd->regs = regs;
 251
 252        ehci = hcd_to_ehci(hcd);
 253        ehci->caps = hcd->regs + 0x100;
 254        ehci->regs = hcd->regs + 0x100 +
 255                HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 256        ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 257        hcd->has_tt = 1;
 258        ehci->sbrn = 0x20;
 259
 260        /*
 261         * (Re-)program MBUS remapping windows if we are asked to.
 262         */
 263        dram = mv_mbus_dram_info();
 264        if (dram)
 265                ehci_orion_conf_mbus_windows(hcd, dram);
 266
 267        /*
 268         * setup Orion USB controller.
 269         */
 270        switch (pd->phy_version) {
 271        case EHCI_PHY_NA:       /* dont change USB phy settings */
 272                break;
 273        case EHCI_PHY_ORION:
 274                orion_usb_phy_v1_setup(hcd);
 275                break;
 276        case EHCI_PHY_DD:
 277        case EHCI_PHY_KW:
 278        default:
 279                printk(KERN_WARNING "Orion ehci -USB phy version isn't supported.\n");
 280        }
 281
 282        err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 283        if (err)
 284                goto err4;
 285
 286        return 0;
 287
 288err4:
 289        usb_put_hcd(hcd);
 290err3:
 291        iounmap(regs);
 292err2:
 293        release_mem_region(res->start, resource_size(res));
 294err1:
 295        dev_err(&pdev->dev, "init %s fail, %d\n",
 296                dev_name(&pdev->dev), err);
 297
 298        return err;
 299}
 300
 301static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
 302{
 303        struct usb_hcd *hcd = platform_get_drvdata(pdev);
 304
 305        usb_remove_hcd(hcd);
 306        iounmap(hcd->regs);
 307        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 308        usb_put_hcd(hcd);
 309
 310        return 0;
 311}
 312
 313MODULE_ALIAS("platform:orion-ehci");
 314
 315static struct platform_driver ehci_orion_driver = {
 316        .probe          = ehci_orion_drv_probe,
 317        .remove         = __exit_p(ehci_orion_drv_remove),
 318        .shutdown       = usb_hcd_platform_shutdown,
 319        .driver.name    = "orion-ehci",
 320};
 321