bcm6348-usbh-phy.c 1.8 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192
  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 <clk.h>
  11. #include <dm.h>
  12. #include <generic-phy.h>
  13. #include <log.h>
  14. #include <malloc.h>
  15. #include <reset.h>
  16. #include <asm/io.h>
  17. #include <dm/device.h>
  18. #include <linux/bitops.h>
  19. #define USBH_SETUP_PORT1_EN BIT(0)
  20. struct bcm6348_usbh_priv {
  21. void __iomem *regs;
  22. };
  23. static int bcm6348_usbh_init(struct phy *phy)
  24. {
  25. struct bcm6348_usbh_priv *priv = dev_get_priv(phy->dev);
  26. writel_be(USBH_SETUP_PORT1_EN, priv->regs);
  27. return 0;
  28. }
  29. static struct phy_ops bcm6348_usbh_ops = {
  30. .init = bcm6348_usbh_init,
  31. };
  32. static const struct udevice_id bcm6348_usbh_ids[] = {
  33. { .compatible = "brcm,bcm6348-usbh" },
  34. { /* sentinel */ }
  35. };
  36. static int bcm6348_usbh_probe(struct udevice *dev)
  37. {
  38. struct bcm6348_usbh_priv *priv = dev_get_priv(dev);
  39. struct reset_ctl rst_ctl;
  40. struct clk clk;
  41. int ret;
  42. priv->regs = dev_remap_addr(dev);
  43. if (!priv->regs)
  44. return -EINVAL;
  45. /* enable usbh clock */
  46. ret = clk_get_by_name(dev, "usbh", &clk);
  47. if (ret < 0)
  48. return ret;
  49. ret = clk_enable(&clk);
  50. if (ret < 0)
  51. return ret;
  52. ret = clk_free(&clk);
  53. if (ret < 0)
  54. return ret;
  55. /* perform reset */
  56. ret = reset_get_by_index(dev, 0, &rst_ctl);
  57. if (ret < 0)
  58. return ret;
  59. ret = reset_deassert(&rst_ctl);
  60. if (ret < 0)
  61. return ret;
  62. ret = reset_free(&rst_ctl);
  63. if (ret < 0)
  64. return ret;
  65. return 0;
  66. }
  67. U_BOOT_DRIVER(bcm6348_usbh) = {
  68. .name = "bcm6348-usbh",
  69. .id = UCLASS_PHY,
  70. .of_match = bcm6348_usbh_ids,
  71. .ops = &bcm6348_usbh_ops,
  72. .priv_auto = sizeof(struct bcm6348_usbh_priv),
  73. .probe = bcm6348_usbh_probe,
  74. };