| // 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}; |
| |
| 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, |
| }; |