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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Xilinx Zynq MPSoC Firmware driver
- *
- * Copyright (C) 2018-2019 Xilinx, Inc.
- */
- #include <common.h>
- #include <dm.h>
- #include <log.h>
- #include <zynqmp_firmware.h>
- #include <asm/cache.h>
- #include <asm/ptrace.h>
- #if defined(CONFIG_ZYNQMP_IPI)
- #include <mailbox.h>
- #include <asm/arch/sys_proto.h>
- #define PMUFW_PAYLOAD_ARG_CNT 8
- #define XST_PM_NO_ACCESS 2002L
- struct zynqmp_power {
- struct mbox_chan tx_chan;
- struct mbox_chan rx_chan;
- } zynqmp_power;
- static int ipi_req(const u32 *req, size_t req_len, u32 *res, size_t res_maxlen)
- {
- struct zynqmp_ipi_msg msg;
- int ret;
- if (req_len > PMUFW_PAYLOAD_ARG_CNT ||
- res_maxlen > PMUFW_PAYLOAD_ARG_CNT)
- return -EINVAL;
- if (!(zynqmp_power.tx_chan.dev) || !(&zynqmp_power.rx_chan.dev))
- return -EINVAL;
- debug("%s, Sending IPI message with ID: 0x%0x\n", __func__, req[0]);
- msg.buf = (u32 *)req;
- msg.len = req_len;
- ret = mbox_send(&zynqmp_power.tx_chan, &msg);
- if (ret) {
- debug("%s: Sending message failed\n", __func__);
- return ret;
- }
- msg.buf = res;
- msg.len = res_maxlen;
- ret = mbox_recv(&zynqmp_power.rx_chan, &msg, 100);
- if (ret)
- debug("%s: Receiving message failed\n", __func__);
- return ret;
- }
- unsigned int zynqmp_firmware_version(void)
- {
- int ret;
- u32 ret_payload[PAYLOAD_ARG_CNT];
- static u32 pm_api_version = ZYNQMP_PM_VERSION_INVALID;
- /*
- * Get PMU version only once and later
- * just return stored values instead of
- * asking PMUFW again.
- **/
- if (pm_api_version == ZYNQMP_PM_VERSION_INVALID) {
- ret = xilinx_pm_request(PM_GET_API_VERSION, 0, 0, 0, 0,
- ret_payload);
- if (ret)
- panic("PMUFW is not found - Please load it!\n");
- pm_api_version = ret_payload[1];
- if (pm_api_version < ZYNQMP_PM_VERSION)
- panic("PMUFW version error. Expected: v%d.%d\n",
- ZYNQMP_PM_VERSION_MAJOR, ZYNQMP_PM_VERSION_MINOR);
- }
- return pm_api_version;
- };
- /**
- * Send a configuration object to the PMU firmware.
- *
- * @cfg_obj: Pointer to the configuration object
- * @size: Size of @cfg_obj in bytes
- */
- void zynqmp_pmufw_load_config_object(const void *cfg_obj, size_t size)
- {
- int err;
- u32 ret_payload[PAYLOAD_ARG_CNT];
- printf("Loading new PMUFW cfg obj (%ld bytes)\n", size);
- err = xilinx_pm_request(PM_SET_CONFIGURATION, (u32)(u64)cfg_obj, 0, 0,
- 0, ret_payload);
- if (err == XST_PM_NO_ACCESS) {
- printf("PMUFW no permission to change config object\n");
- return;
- }
- if (err)
- printf("Cannot load PMUFW configuration object (%d)\n", err);
- if (ret_payload[0])
- printf("PMUFW returned 0x%08x status!\n", ret_payload[0]);
- if ((err || ret_payload[0]) && IS_ENABLED(CONFIG_SPL_BUILD))
- panic("PMUFW config object loading failed in EL3\n");
- }
- static int zynqmp_power_probe(struct udevice *dev)
- {
- int ret;
- debug("%s, (dev=%p)\n", __func__, dev);
- ret = mbox_get_by_name(dev, "tx", &zynqmp_power.tx_chan);
- if (ret) {
- debug("%s: Cannot find tx mailbox\n", __func__);
- return ret;
- }
- ret = mbox_get_by_name(dev, "rx", &zynqmp_power.rx_chan);
- if (ret) {
- debug("%s: Cannot find rx mailbox\n", __func__);
- return ret;
- }
- ret = zynqmp_firmware_version();
- printf("PMUFW:\tv%d.%d\n",
- ret >> ZYNQMP_PM_VERSION_MAJOR_SHIFT,
- ret & ZYNQMP_PM_VERSION_MINOR_MASK);
- return 0;
- };
- static const struct udevice_id zynqmp_power_ids[] = {
- { .compatible = "xlnx,zynqmp-power" },
- { }
- };
- U_BOOT_DRIVER(zynqmp_power) = {
- .name = "zynqmp_power",
- .id = UCLASS_FIRMWARE,
- .of_match = zynqmp_power_ids,
- .probe = zynqmp_power_probe,
- };
- #endif
- int __maybe_unused xilinx_pm_request(u32 api_id, u32 arg0, u32 arg1, u32 arg2,
- u32 arg3, u32 *ret_payload)
- {
- debug("%s at EL%d, API ID: 0x%0x\n", __func__, current_el(), api_id);
- if (IS_ENABLED(CONFIG_SPL_BUILD) || current_el() == 3) {
- #if defined(CONFIG_ZYNQMP_IPI)
- /*
- * Use fixed payload and arg size as the EL2 call. The firmware
- * is capable to handle PMUFW_PAYLOAD_ARG_CNT bytes but the
- * firmware API is limited by the SMC call size
- */
- u32 regs[] = {api_id, arg0, arg1, arg2, arg3};
- if (api_id == PM_FPGA_LOAD) {
- /* Swap addr_hi/low because of incompatibility */
- u32 temp = regs[1];
- regs[1] = regs[2];
- regs[2] = temp;
- }
- ipi_req(regs, PAYLOAD_ARG_CNT, ret_payload, PAYLOAD_ARG_CNT);
- #else
- return -EPERM;
- #endif
- } else {
- /*
- * Added SIP service call Function Identifier
- * Make sure to stay in x0 register
- */
- struct pt_regs regs;
- regs.regs[0] = PM_SIP_SVC | api_id;
- regs.regs[1] = ((u64)arg1 << 32) | arg0;
- regs.regs[2] = ((u64)arg3 << 32) | arg2;
- smc_call(®s);
- if (ret_payload) {
- ret_payload[0] = (u32)regs.regs[0];
- ret_payload[1] = upper_32_bits(regs.regs[0]);
- ret_payload[2] = (u32)regs.regs[1];
- ret_payload[3] = upper_32_bits(regs.regs[1]);
- ret_payload[4] = (u32)regs.regs[2];
- }
- }
- return (ret_payload) ? ret_payload[0] : 0;
- }
- static const struct udevice_id zynqmp_firmware_ids[] = {
- { .compatible = "xlnx,zynqmp-firmware" },
- { .compatible = "xlnx,versal-firmware"},
- { }
- };
- U_BOOT_DRIVER(zynqmp_firmware) = {
- .id = UCLASS_FIRMWARE,
- .name = "zynqmp_firmware",
- .of_match = zynqmp_firmware_ids,
- };
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