firmware-zynqmp.c 4.3 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Xilinx Zynq MPSoC Firmware driver
  4. *
  5. * Copyright (C) 2018-2019 Xilinx, Inc.
  6. */
  7. #include <common.h>
  8. #include <dm.h>
  9. #include <zynqmp_firmware.h>
  10. #if defined(CONFIG_ZYNQMP_IPI)
  11. #include <mailbox.h>
  12. #include <asm/arch/sys_proto.h>
  13. #define PMUFW_PAYLOAD_ARG_CNT 8
  14. struct zynqmp_power {
  15. struct mbox_chan tx_chan;
  16. struct mbox_chan rx_chan;
  17. } zynqmp_power;
  18. static int ipi_req(const u32 *req, size_t req_len, u32 *res, size_t res_maxlen)
  19. {
  20. struct zynqmp_ipi_msg msg;
  21. int ret;
  22. if (req_len > PMUFW_PAYLOAD_ARG_CNT ||
  23. res_maxlen > PMUFW_PAYLOAD_ARG_CNT)
  24. return -EINVAL;
  25. if (!(zynqmp_power.tx_chan.dev) || !(&zynqmp_power.rx_chan.dev))
  26. return -EINVAL;
  27. msg.buf = (u32 *)req;
  28. msg.len = req_len;
  29. ret = mbox_send(&zynqmp_power.tx_chan, &msg);
  30. if (ret) {
  31. debug("%s: Sending message failed\n", __func__);
  32. return ret;
  33. }
  34. msg.buf = res;
  35. msg.len = res_maxlen;
  36. ret = mbox_recv(&zynqmp_power.rx_chan, &msg, 100);
  37. if (ret)
  38. debug("%s: Receiving message failed\n", __func__);
  39. return ret;
  40. }
  41. static int send_req(const u32 *req, size_t req_len, u32 *res, size_t res_maxlen)
  42. {
  43. if (IS_ENABLED(CONFIG_SPL_BUILD) || current_el() == 3)
  44. return ipi_req(req, req_len, res, res_maxlen);
  45. return xilinx_pm_request(req[0], 0, 0, 0, 0, res);
  46. }
  47. unsigned int zynqmp_firmware_version(void)
  48. {
  49. int ret;
  50. u32 ret_payload[PAYLOAD_ARG_CNT];
  51. static u32 pm_api_version = ZYNQMP_PM_VERSION_INVALID;
  52. /*
  53. * Get PMU version only once and later
  54. * just return stored values instead of
  55. * asking PMUFW again.
  56. **/
  57. if (pm_api_version == ZYNQMP_PM_VERSION_INVALID) {
  58. const u32 request[] = { PM_GET_API_VERSION };
  59. ret = send_req(request, ARRAY_SIZE(request), ret_payload, 2);
  60. if (ret)
  61. panic("PMUFW is not found - Please load it!\n");
  62. pm_api_version = ret_payload[1];
  63. if (pm_api_version < ZYNQMP_PM_VERSION)
  64. panic("PMUFW version error. Expected: v%d.%d\n",
  65. ZYNQMP_PM_VERSION_MAJOR, ZYNQMP_PM_VERSION_MINOR);
  66. }
  67. return pm_api_version;
  68. };
  69. /**
  70. * Send a configuration object to the PMU firmware.
  71. *
  72. * @cfg_obj: Pointer to the configuration object
  73. * @size: Size of @cfg_obj in bytes
  74. */
  75. void zynqmp_pmufw_load_config_object(const void *cfg_obj, size_t size)
  76. {
  77. const u32 request[] = {
  78. PM_SET_CONFIGURATION,
  79. (u32)((u64)cfg_obj)
  80. };
  81. u32 response;
  82. int err;
  83. printf("Loading new PMUFW cfg obj (%ld bytes)\n", size);
  84. err = send_req(request, ARRAY_SIZE(request), &response, 1);
  85. if (err)
  86. panic("Cannot load PMUFW configuration object (%d)\n", err);
  87. if (response != 0)
  88. panic("PMUFW returned 0x%08x status!\n", response);
  89. }
  90. static int zynqmp_power_probe(struct udevice *dev)
  91. {
  92. int ret;
  93. debug("%s, (dev=%p)\n", __func__, dev);
  94. ret = mbox_get_by_name(dev, "tx", &zynqmp_power.tx_chan);
  95. if (ret) {
  96. debug("%s: Cannot find tx mailbox\n", __func__);
  97. return ret;
  98. }
  99. ret = mbox_get_by_name(dev, "rx", &zynqmp_power.rx_chan);
  100. if (ret) {
  101. debug("%s: Cannot find rx mailbox\n", __func__);
  102. return ret;
  103. }
  104. ret = zynqmp_firmware_version();
  105. printf("PMUFW:\tv%d.%d\n",
  106. ret >> ZYNQMP_PM_VERSION_MAJOR_SHIFT,
  107. ret & ZYNQMP_PM_VERSION_MINOR_MASK);
  108. return 0;
  109. };
  110. static const struct udevice_id zynqmp_power_ids[] = {
  111. { .compatible = "xlnx,zynqmp-power" },
  112. { }
  113. };
  114. U_BOOT_DRIVER(zynqmp_power) = {
  115. .name = "zynqmp_power",
  116. .id = UCLASS_FIRMWARE,
  117. .of_match = zynqmp_power_ids,
  118. .probe = zynqmp_power_probe,
  119. };
  120. #endif
  121. int __maybe_unused xilinx_pm_request(u32 api_id, u32 arg0, u32 arg1, u32 arg2,
  122. u32 arg3, u32 *ret_payload)
  123. {
  124. /*
  125. * Added SIP service call Function Identifier
  126. * Make sure to stay in x0 register
  127. */
  128. struct pt_regs regs;
  129. if (current_el() == 3) {
  130. printf("%s: Can't call SMC from EL3 context\n", __func__);
  131. return -EPERM;
  132. }
  133. regs.regs[0] = PM_SIP_SVC | api_id;
  134. regs.regs[1] = ((u64)arg1 << 32) | arg0;
  135. regs.regs[2] = ((u64)arg3 << 32) | arg2;
  136. smc_call(&regs);
  137. if (ret_payload) {
  138. ret_payload[0] = (u32)regs.regs[0];
  139. ret_payload[1] = upper_32_bits(regs.regs[0]);
  140. ret_payload[2] = (u32)regs.regs[1];
  141. ret_payload[3] = upper_32_bits(regs.regs[1]);
  142. ret_payload[4] = (u32)regs.regs[2];
  143. }
  144. return regs.regs[0];
  145. }
  146. static const struct udevice_id zynqmp_firmware_ids[] = {
  147. { .compatible = "xlnx,zynqmp-firmware" },
  148. { .compatible = "xlnx,versal-firmware"},
  149. { }
  150. };
  151. U_BOOT_DRIVER(zynqmp_firmware) = {
  152. .id = UCLASS_FIRMWARE,
  153. .name = "zynqmp-firmware",
  154. .of_match = zynqmp_firmware_ids,
  155. };