bcm6358-usbh-phy.c 2.0 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2018 Álvaro Fernández Rojas <noltari@gmail.com>
  4. *
  5. * Derived from linux/arch/mips/bcm63xx/usb-common.c:
  6. * Copyright 2008 Maxime Bizon <mbizon@freebox.fr>
  7. * Copyright 2013 Florian Fainelli <florian@openwrt.org>
  8. */
  9. #include <common.h>
  10. #include <dm.h>
  11. #include <generic-phy.h>
  12. #include <reset.h>
  13. #include <asm/io.h>
  14. #include <dm/device.h>
  15. /* USBH Swap Control register */
  16. #define USBH_SWAP_REG 0x00
  17. #define USBH_SWAP_OHCI_DATA BIT(0)
  18. #define USBH_SWAP_OHCI_ENDIAN BIT(1)
  19. #define USBH_SWAP_EHCI_DATA BIT(3)
  20. #define USBH_SWAP_EHCI_ENDIAN BIT(4)
  21. /* USBH Test register */
  22. #define USBH_TEST_REG 0x24
  23. #define USBH_TEST_PORT_CTL 0x1c0020
  24. struct bcm6358_usbh_priv {
  25. void __iomem *regs;
  26. };
  27. static int bcm6358_usbh_init(struct phy *phy)
  28. {
  29. struct bcm6358_usbh_priv *priv = dev_get_priv(phy->dev);
  30. /* configure to work in native cpu endian */
  31. clrsetbits_be32(priv->regs + USBH_SWAP_REG,
  32. USBH_SWAP_EHCI_ENDIAN | USBH_SWAP_OHCI_ENDIAN,
  33. USBH_SWAP_EHCI_DATA | USBH_SWAP_OHCI_DATA);
  34. /* test port control */
  35. writel_be(USBH_TEST_PORT_CTL, priv->regs + USBH_TEST_REG);
  36. return 0;
  37. }
  38. static struct phy_ops bcm6358_usbh_ops = {
  39. .init = bcm6358_usbh_init,
  40. };
  41. static const struct udevice_id bcm6358_usbh_ids[] = {
  42. { .compatible = "brcm,bcm6358-usbh" },
  43. { /* sentinel */ }
  44. };
  45. static int bcm6358_usbh_probe(struct udevice *dev)
  46. {
  47. struct bcm6358_usbh_priv *priv = dev_get_priv(dev);
  48. struct reset_ctl rst_ctl;
  49. int ret;
  50. priv->regs = dev_remap_addr(dev);
  51. if (!priv->regs)
  52. return -EINVAL;
  53. /* perform reset */
  54. ret = reset_get_by_index(dev, 0, &rst_ctl);
  55. if (ret < 0)
  56. return ret;
  57. ret = reset_deassert(&rst_ctl);
  58. if (ret < 0)
  59. return ret;
  60. ret = reset_free(&rst_ctl);
  61. if (ret < 0)
  62. return ret;
  63. return 0;
  64. }
  65. U_BOOT_DRIVER(bcm6358_usbh) = {
  66. .name = "bcm6358-usbh",
  67. .id = UCLASS_PHY,
  68. .of_match = bcm6358_usbh_ids,
  69. .ops = &bcm6358_usbh_ops,
  70. .priv_auto_alloc_size = sizeof(struct bcm6358_usbh_priv),
  71. .probe = bcm6358_usbh_probe,
  72. };