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 <log.h>
  13. #include <malloc.h>
  14. #include <reset.h>
  15. #include <asm/io.h>
  16. #include <dm/device.h>
  17. #include <linux/bitops.h>
  18. /* USBH Swap Control register */
  19. #define USBH_SWAP_REG 0x00
  20. #define USBH_SWAP_OHCI_DATA BIT(0)
  21. #define USBH_SWAP_OHCI_ENDIAN BIT(1)
  22. #define USBH_SWAP_EHCI_DATA BIT(3)
  23. #define USBH_SWAP_EHCI_ENDIAN BIT(4)
  24. /* USBH Test register */
  25. #define USBH_TEST_REG 0x24
  26. #define USBH_TEST_PORT_CTL 0x1c0020
  27. struct bcm6358_usbh_priv {
  28. void __iomem *regs;
  29. };
  30. static int bcm6358_usbh_init(struct phy *phy)
  31. {
  32. struct bcm6358_usbh_priv *priv = dev_get_priv(phy->dev);
  33. /* configure to work in native cpu endian */
  34. clrsetbits_be32(priv->regs + USBH_SWAP_REG,
  35. USBH_SWAP_EHCI_ENDIAN | USBH_SWAP_OHCI_ENDIAN,
  36. USBH_SWAP_EHCI_DATA | USBH_SWAP_OHCI_DATA);
  37. /* test port control */
  38. writel_be(USBH_TEST_PORT_CTL, priv->regs + USBH_TEST_REG);
  39. return 0;
  40. }
  41. static struct phy_ops bcm6358_usbh_ops = {
  42. .init = bcm6358_usbh_init,
  43. };
  44. static const struct udevice_id bcm6358_usbh_ids[] = {
  45. { .compatible = "brcm,bcm6358-usbh" },
  46. { /* sentinel */ }
  47. };
  48. static int bcm6358_usbh_probe(struct udevice *dev)
  49. {
  50. struct bcm6358_usbh_priv *priv = dev_get_priv(dev);
  51. struct reset_ctl rst_ctl;
  52. int ret;
  53. priv->regs = dev_remap_addr(dev);
  54. if (!priv->regs)
  55. return -EINVAL;
  56. /* perform reset */
  57. ret = reset_get_by_index(dev, 0, &rst_ctl);
  58. if (ret < 0)
  59. return ret;
  60. ret = reset_deassert(&rst_ctl);
  61. if (ret < 0)
  62. return ret;
  63. ret = reset_free(&rst_ctl);
  64. if (ret < 0)
  65. return ret;
  66. return 0;
  67. }
  68. U_BOOT_DRIVER(bcm6358_usbh) = {
  69. .name = "bcm6358-usbh",
  70. .id = UCLASS_PHY,
  71. .of_match = bcm6358_usbh_ids,
  72. .ops = &bcm6358_usbh_ops,
  73. .priv_auto = sizeof(struct bcm6358_usbh_priv),
  74. .probe = bcm6358_usbh_probe,
  75. };