xhci-rcar.c 3.7 KB

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