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_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
 102static 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
 126static 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
 168static void __init
 169ehci_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
 189static 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
 271err4:
 272        usb_put_hcd(hcd);
 273err3:
 274        iounmap(regs);
 275err2:
 276        release_mem_region(res->start, res->end - res->start + 1);
 277err1:
 278        dev_err(&pdev->dev, "init %s fail, %d\n",
 279                dev_name(&pdev->dev), err);
 280
 281        return err;
 282}
 283
 284static 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
 296MODULE_ALIAS("platform:orion-ehci");
 297
 298static 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};
 304