xhci-rcar.c 3.7 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2017 Marek Vasut <marek.vasut@gmail.com>
  4. *
  5. * Renesas RCar USB HOST xHCI Controller
  6. */
  7. #include <common.h>
  8. #include <clk.h>
  9. #include <dm.h>
  10. #include <fdtdec.h>
  11. #include <usb.h>
  12. #include <wait_bit.h>
  13. #include "xhci.h"
  14. #include "xhci-rcar-r8a779x_usb3_v3.h"
  15. /* Register Offset */
  16. #define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */
  17. #define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */
  18. /* Register Settings */
  19. /* FW Download Control & Status */
  20. #define RCAR_USB3_DL_CTRL_ENABLE BIT(0)
  21. #define RCAR_USB3_DL_CTRL_FW_SUCCESS BIT(4)
  22. #define RCAR_USB3_DL_CTRL_FW_SET_DATA0 BIT(8)
  23. struct rcar_xhci_platdata {
  24. fdt_addr_t hcd_base;
  25. struct clk clk;
  26. };
  27. /**
  28. * Contains pointers to register base addresses
  29. * for the usb controller.
  30. */
  31. struct rcar_xhci {
  32. struct xhci_ctrl ctrl; /* Needs to come first in this struct! */
  33. struct usb_platdata usb_plat;
  34. struct xhci_hccr *hcd;
  35. };
  36. static int xhci_rcar_download_fw(struct rcar_xhci *ctx, const u32 *fw_data,
  37. const size_t fw_array_size)
  38. {
  39. void __iomem *regs = (void __iomem *)ctx->hcd;
  40. int i, ret;
  41. /* Download R-Car USB3.0 firmware */
  42. setbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE);
  43. for (i = 0; i < fw_array_size; i++) {
  44. writel(fw_data[i], regs + RCAR_USB3_FW_DATA0);
  45. setbits_le32(regs + RCAR_USB3_DL_CTRL,
  46. RCAR_USB3_DL_CTRL_FW_SET_DATA0);
  47. ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL,
  48. RCAR_USB3_DL_CTRL_FW_SET_DATA0, false,
  49. 10, false);
  50. if (ret)
  51. break;
  52. }
  53. clrbits_le32(regs + RCAR_USB3_DL_CTRL, RCAR_USB3_DL_CTRL_ENABLE);
  54. ret = wait_for_bit_le32(regs + RCAR_USB3_DL_CTRL,
  55. RCAR_USB3_DL_CTRL_FW_SUCCESS, true,
  56. 10, false);
  57. return ret;
  58. }
  59. static int xhci_rcar_probe(struct udevice *dev)
  60. {
  61. struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
  62. struct rcar_xhci *ctx = dev_get_priv(dev);
  63. struct xhci_hcor *hcor;
  64. int len, ret;
  65. ret = clk_get_by_index(dev, 0, &plat->clk);
  66. if (ret < 0) {
  67. dev_err(dev, "Failed to get USB3 clock\n");
  68. return ret;
  69. }
  70. ret = clk_enable(&plat->clk);
  71. if (ret) {
  72. dev_err(dev, "Failed to enable USB3 clock\n");
  73. goto err_clk;
  74. }
  75. ctx->hcd = (struct xhci_hccr *)plat->hcd_base;
  76. len = HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase));
  77. hcor = (struct xhci_hcor *)((uintptr_t)ctx->hcd + len);
  78. ret = xhci_rcar_download_fw(ctx, firmware_r8a779x_usb3_v3,
  79. ARRAY_SIZE(firmware_r8a779x_usb3_v3));
  80. if (ret) {
  81. dev_err(dev, "Failed to download firmware\n");
  82. goto err_fw;
  83. }
  84. ret = xhci_register(dev, ctx->hcd, hcor);
  85. if (ret) {
  86. dev_err(dev, "Failed to register xHCI\n");
  87. goto err_fw;
  88. }
  89. return 0;
  90. err_fw:
  91. clk_disable(&plat->clk);
  92. err_clk:
  93. clk_free(&plat->clk);
  94. return ret;
  95. }
  96. static int xhci_rcar_deregister(struct udevice *dev)
  97. {
  98. struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
  99. clk_disable(&plat->clk);
  100. clk_free(&plat->clk);
  101. return xhci_deregister(dev);
  102. }
  103. static int xhci_rcar_ofdata_to_platdata(struct udevice *dev)
  104. {
  105. struct rcar_xhci_platdata *plat = dev_get_platdata(dev);
  106. plat->hcd_base = devfdt_get_addr(dev);
  107. if (plat->hcd_base == FDT_ADDR_T_NONE) {
  108. debug("Can't get the XHCI register base address\n");
  109. return -ENXIO;
  110. }
  111. return 0;
  112. }
  113. static const struct udevice_id xhci_rcar_ids[] = {
  114. { .compatible = "renesas,xhci-r8a7795" },
  115. { .compatible = "renesas,xhci-r8a7796" },
  116. { .compatible = "renesas,xhci-r8a77965" },
  117. { }
  118. };
  119. U_BOOT_DRIVER(usb_xhci) = {
  120. .name = "xhci_rcar",
  121. .id = UCLASS_USB,
  122. .probe = xhci_rcar_probe,
  123. .remove = xhci_rcar_deregister,
  124. .ops = &xhci_usb_ops,
  125. .of_match = xhci_rcar_ids,
  126. .ofdata_to_platdata = xhci_rcar_ofdata_to_platdata,
  127. .platdata_auto_alloc_size = sizeof(struct rcar_xhci_platdata),
  128. .priv_auto_alloc_size = sizeof(struct rcar_xhci),
  129. .flags = DM_FLAG_ALLOC_PRIV_DMA,
  130. };