target/linux/bcm53xx/patches-4.4/197-USB-bcma-add-USB-3.0-support.patch

   1 From 121ec6539abedbc0e975cf35f48ee044b323e4c3 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
   3 Date: Tue, 16 Jun 2015 17:14:26 +0200
   4 Subject: [PATCH v3 5/6] usb: bcma: add USB 3.0 support
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
  10 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  11 ---
  12  drivers/usb/host/bcma-hcd.c | 225 ++++++++++++++++++++++++++++++++++++++++++++
  13  1 file changed, 225 insertions(+)
  14
  15 --- a/drivers/usb/host/bcma-hcd.c
  16 +++ b/drivers/usb/host/bcma-hcd.c
  17 @@ -29,6 +29,7 @@
  18  #include <linux/of_gpio.h>
  19  #include <linux/usb/ehci_pdriver.h>
  20  #include <linux/usb/ohci_pdriver.h>
  21 +#include <linux/usb/xhci_pdriver.h>
  22
  23  MODULE_AUTHOR("Hauke Mehrtens");
  24  MODULE_DESCRIPTION("Common USB driver for BCMA Bus");
  25 @@ -38,6 +39,7 @@ struct bcma_hcd_device {
  26         struct bcma_device *core;
  27         struct platform_device *ehci_dev;
  28         struct platform_device *ohci_dev;
  29 +       struct platform_device *xhci_dev;
  30         struct gpio_desc *gpio_desc;
  31  };
  32
  33 @@ -245,6 +247,10 @@ static const struct usb_ehci_pdata ehci_
  34  static const struct usb_ohci_pdata ohci_pdata = {
  35  };
  36
  37 +static const struct usb_xhci_pdata xhci_pdata = {
  38 +       .usb3_fake_doorbell = 1
  39 +};
  40 +
  41  static struct platform_device *bcma_hcd_create_pdev(struct bcma_device *dev,
  42                                                     const char *name, u32 addr,
  43                                                     const void *data,
  44 @@ -338,6 +344,165 @@ err_unregister_ohci_dev:
  45         return err;
  46  }
  47
  48 +static bool bcma_wait_reg(struct bcma_bus *bus, void __iomem *addr, u32 mask,
  49 +                         u32 value, int timeout)
  50 +{
  51 +       unsigned long deadline = jiffies + timeout;
  52 +       u32 val;
  53 +
  54 +       do {
  55 +               val = readl(addr);
  56 +               if ((val & mask) == value)
  57 +                       return true;
  58 +               cpu_relax();
  59 +               udelay(10);
  60 +       } while (!time_after_eq(jiffies, deadline));
  61 +
  62 +       pr_err("Timeout waiting for register %p\n", addr);
  63 +
  64 +       return false;
  65 +}
  66 +
  67 +static void bcma_hcd_usb30_phy_init(struct bcma_hcd_device *bcma_hcd)
  68 +{
  69 +       struct bcma_device *core = bcma_hcd->core;
  70 +       struct bcma_bus *bus = core->bus;
  71 +       struct bcma_chipinfo *chipinfo = &bus->chipinfo;
  72 +       struct bcma_drv_cc_b *ccb = &bus->drv_cc_b;
  73 +       struct bcma_device *arm_core;
  74 +       void __iomem *dmu = NULL;
  75 +       u32 cru_straps_ctrl;
  76 +
  77 +       if (chipinfo->id != BCMA_CHIP_ID_BCM4707 &&
  78 +           chipinfo->id != BCMA_CHIP_ID_BCM53018)
  79 +               return;
  80 +
  81 +       arm_core = bcma_find_core(bus, BCMA_CORE_ARMCA9);
  82 +       if (!arm_core)
  83 +               return;
  84 +
  85 +       dmu = ioremap_nocache(arm_core->addr_s[0], 0x1000);
  86 +       if (!dmu)
  87 +               goto out;
  88 +
  89 +       /* Check strapping of PCIE/USB3 SEL */
  90 +       cru_straps_ctrl = ioread32(dmu + 0x2a0);
  91 +       if ((cru_straps_ctrl & 0x10) == 0)
  92 +               goto out;
  93 +
  94 +       /* Perform USB3 system soft reset */
  95 +       bcma_awrite32(core, BCMA_RESET_CTL, BCMA_RESET_CTL_RESET);
  96 +
  97 +       /* Enable MDIO. Setting MDCDIV as 26  */
  98 +       iowrite32(0x0000009a, ccb->mii + 0x000);
  99 +       udelay(2);
 100 +
 101 +       if (chipinfo->id == BCMA_CHIP_ID_BCM53018 ||
 102 +           chipinfo->id == BCMA_CHIP_ID_BCM4707 && chipinfo->rev == 4) {
 103 +                       /* For NS-B0, USB3 PLL Block */
 104 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 105 +                       iowrite32(0x587e8000, ccb->mii + 0x004);
 106 +
 107 +                       /* Clear ana_pllSeqStart */
 108 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 109 +                       iowrite32(0x58061000, ccb->mii + 0x004);
 110 +
 111 +                       /* CMOS Divider ratio to 25 */
 112 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 113 +                       iowrite32(0x582a6400, ccb->mii + 0x004);
 114 +
 115 +                       /* Asserting PLL Reset */
 116 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 117 +                       iowrite32(0x582ec000, ccb->mii + 0x004);
 118 +
 119 +                       /* Deaaserting PLL Reset */
 120 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 121 +                       iowrite32(0x582e8000, ccb->mii + 0x004);
 122 +
 123 +                       /* Waiting MII Mgt interface idle */
 124 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 125 +
 126 +                       /* Deasserting USB3 system reset */
 127 +                       bcma_awrite32(core, BCMA_RESET_CTL, 0);
 128 +
 129 +                       /* PLL frequency monitor enable */
 130 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 131 +                       iowrite32(0x58069000, ccb->mii + 0x004);
 132 +
 133 +                       /* PIPE Block */
 134 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 135 +                       iowrite32(0x587e8060, ccb->mii + 0x004);
 136 +
 137 +                       /* CMPMAX & CMPMINTH setting */
 138 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 139 +                       iowrite32(0x580af30d, ccb->mii + 0x004);
 140 +
 141 +                       /* DEGLITCH MIN & MAX setting */
 142 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 143 +                       iowrite32(0x580e6302, ccb->mii + 0x004);
 144 +
 145 +                       /* TXPMD block */
 146 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 147 +                       iowrite32(0x587e8040, ccb->mii + 0x004);
 148 +
 149 +                       /* Enabling SSC */
 150 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 151 +                       iowrite32(0x58061003, ccb->mii + 0x004);
 152 +
 153 +                       /* Waiting MII Mgt interface idle */
 154 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 155 +       } else if (chipinfo->id == BCMA_CHIP_ID_BCM4707) {
 156 +                       /* PLL30 block */
 157 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 158 +                       iowrite32(0x587e8000, ccb->mii + 0x004);
 159 +
 160 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 161 +                       iowrite32(0x582a6400, ccb->mii + 0x004);
 162 +
 163 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 164 +                       iowrite32(0x587e80e0, ccb->mii + 0x004);
 165 +
 166 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 167 +                       iowrite32(0x580a009c, ccb->mii + 0x004);
 168 +
 169 +                       /* Enable SSC */
 170 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 171 +                       iowrite32(0x587e8040, ccb->mii + 0x004);
 172 +
 173 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 174 +                       iowrite32(0x580a21d3, ccb->mii + 0x004);
 175 +
 176 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 177 +                       iowrite32(0x58061003, ccb->mii + 0x004);
 178 +
 179 +                       /* Waiting MII Mgt interface idle */
 180 +                       bcma_wait_reg(bus, ccb->mii + 0x000, 0x0100, 0x0000, 1000);
 181 +
 182 +                       /* Deasserting USB3 system reset */
 183 +                       bcma_awrite32(core, BCMA_RESET_CTL, 0);
 184 +       }
 185 +out:
 186 +       if (dmu)
 187 +               iounmap(dmu);
 188 +}
 189 +
 190 +static int bcma_hcd_usb30_init(struct bcma_hcd_device *bcma_hcd)
 191 +{
 192 +       struct bcma_device *core = bcma_hcd->core;
 193 +
 194 +       bcma_core_enable(core, 0);
 195 +
 196 +       bcma_hcd_usb30_phy_init(bcma_hcd);
 197 +
 198 +       bcma_hcd->xhci_dev = bcma_hcd_create_pdev(core, "xhci-hcd", core->addr,
 199 +                                                 &xhci_pdata,
 200 +                                                 sizeof(xhci_pdata));
 201 +       if (IS_ERR(bcma_hcd->ohci_dev))
 202 +               return PTR_ERR(bcma_hcd->ohci_dev);
 203 +
 204 +       return 0;
 205 +}
 206 +
 207  static int bcma_hcd_probe(struct bcma_device *core)
 208  {
 209         int err;
 210 @@ -364,6 +529,11 @@ static int bcma_hcd_probe(struct bcma_de
 211                 if (err)
 212                         return err;
 213                 break;
 214 +       case BCMA_CORE_NS_USB30:
 215 +               err = bcma_hcd_usb30_init(usb_dev);
 216 +               if (err)
 217 +                       return err;
 218 +               break;
 219         default:
 220                 return -ENODEV;
 221         }
 222 @@ -377,11 +547,14 @@ static void bcma_hcd_remove(struct bcma_
 223         struct bcma_hcd_device *usb_dev = bcma_get_drvdata(dev);
 224         struct platform_device *ohci_dev = usb_dev->ohci_dev;
 225         struct platform_device *ehci_dev = usb_dev->ehci_dev;
 226 +       struct platform_device *xhci_dev = usb_dev->xhci_dev;
 227
 228         if (ohci_dev)
 229                 platform_device_unregister(ohci_dev);
 230         if (ehci_dev)
 231                 platform_device_unregister(ehci_dev);
 232 +       if (xhci_dev)
 233 +               platform_device_unregister(xhci_dev);
 234
 235         bcma_core_disable(dev, 0);
 236  }
 237 @@ -418,6 +591,7 @@ static int bcma_hcd_resume(struct bcma_d
 238  static const struct bcma_device_id bcma_hcd_table[] = {
 239         BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_USB20_HOST, BCMA_ANY_REV, BCMA_ANY_CLASS),
 240         BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_NS_USB20, BCMA_ANY_REV, BCMA_ANY_CLASS),
 241 +       BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_NS_USB30, BCMA_ANY_REV, BCMA_ANY_CLASS),
 242         {},
 243  };
 244  MODULE_DEVICE_TABLE(bcma, bcma_hcd_table);