1 // SPDX-License-Identifier: GPL-2.0
3 * Xilinx Zynq MPSoC Firmware driver
5 * Copyright (C) 2018-2019 Xilinx, Inc.
10 #include <zynqmp_firmware.h>
11 #include <asm/cache.h>
13 #if defined(CONFIG_ZYNQMP_IPI)
15 #include <asm/arch/sys_proto.h>
17 #define PMUFW_PAYLOAD_ARG_CNT 8
20 struct mbox_chan tx_chan;
21 struct mbox_chan rx_chan;
24 static int ipi_req(const u32 *req, size_t req_len, u32 *res, size_t res_maxlen)
26 struct zynqmp_ipi_msg msg;
29 if (req_len > PMUFW_PAYLOAD_ARG_CNT ||
30 res_maxlen > PMUFW_PAYLOAD_ARG_CNT)
33 if (!(zynqmp_power.tx_chan.dev) || !(&zynqmp_power.rx_chan.dev))
38 ret = mbox_send(&zynqmp_power.tx_chan, &msg);
40 debug("%s: Sending message failed\n", __func__);
46 ret = mbox_recv(&zynqmp_power.rx_chan, &msg, 100);
48 debug("%s: Receiving message failed\n", __func__);
53 static int send_req(const u32 *req, size_t req_len, u32 *res, size_t res_maxlen)
55 if (IS_ENABLED(CONFIG_SPL_BUILD) || current_el() == 3)
56 return ipi_req(req, req_len, res, res_maxlen);
58 return xilinx_pm_request(req[0], 0, 0, 0, 0, res);
61 unsigned int zynqmp_firmware_version(void)
64 u32 ret_payload[PAYLOAD_ARG_CNT];
65 static u32 pm_api_version = ZYNQMP_PM_VERSION_INVALID;
68 * Get PMU version only once and later
69 * just return stored values instead of
72 if (pm_api_version == ZYNQMP_PM_VERSION_INVALID) {
73 const u32 request[] = { PM_GET_API_VERSION };
75 ret = send_req(request, ARRAY_SIZE(request), ret_payload, 2);
77 panic("PMUFW is not found - Please load it!\n");
79 pm_api_version = ret_payload[1];
80 if (pm_api_version < ZYNQMP_PM_VERSION)
81 panic("PMUFW version error. Expected: v%d.%d\n",
82 ZYNQMP_PM_VERSION_MAJOR, ZYNQMP_PM_VERSION_MINOR);
85 return pm_api_version;
89 * Send a configuration object to the PMU firmware.
91 * @cfg_obj: Pointer to the configuration object
92 * @size: Size of @cfg_obj in bytes
94 void zynqmp_pmufw_load_config_object(const void *cfg_obj, size_t size)
96 const u32 request[] = {
103 printf("Loading new PMUFW cfg obj (%ld bytes)\n", size);
105 err = send_req(request, ARRAY_SIZE(request), &response, 1);
107 panic("Cannot load PMUFW configuration object (%d)\n", err);
109 panic("PMUFW returned 0x%08x status!\n", response);
112 static int zynqmp_power_probe(struct udevice *dev)
116 debug("%s, (dev=%p)\n", __func__, dev);
118 ret = mbox_get_by_name(dev, "tx", &zynqmp_power.tx_chan);
120 debug("%s: Cannot find tx mailbox\n", __func__);
124 ret = mbox_get_by_name(dev, "rx", &zynqmp_power.rx_chan);
126 debug("%s: Cannot find rx mailbox\n", __func__);
130 ret = zynqmp_firmware_version();
131 printf("PMUFW:\tv%d.%d\n",
132 ret >> ZYNQMP_PM_VERSION_MAJOR_SHIFT,
133 ret & ZYNQMP_PM_VERSION_MINOR_MASK);
138 static const struct udevice_id zynqmp_power_ids[] = {
139 { .compatible = "xlnx,zynqmp-power" },
143 U_BOOT_DRIVER(zynqmp_power) = {
144 .name = "zynqmp_power",
145 .id = UCLASS_FIRMWARE,
146 .of_match = zynqmp_power_ids,
147 .probe = zynqmp_power_probe,
151 int __maybe_unused xilinx_pm_request(u32 api_id, u32 arg0, u32 arg1, u32 arg2,
152 u32 arg3, u32 *ret_payload)
155 * Added SIP service call Function Identifier
156 * Make sure to stay in x0 register
160 if (current_el() == 3) {
161 printf("%s: Can't call SMC from EL3 context\n", __func__);
165 regs.regs[0] = PM_SIP_SVC | api_id;
166 regs.regs[1] = ((u64)arg1 << 32) | arg0;
167 regs.regs[2] = ((u64)arg3 << 32) | arg2;
172 ret_payload[0] = (u32)regs.regs[0];
173 ret_payload[1] = upper_32_bits(regs.regs[0]);
174 ret_payload[2] = (u32)regs.regs[1];
175 ret_payload[3] = upper_32_bits(regs.regs[1]);
176 ret_payload[4] = (u32)regs.regs[2];
182 static const struct udevice_id zynqmp_firmware_ids[] = {
183 { .compatible = "xlnx,zynqmp-firmware" },
184 { .compatible = "xlnx,versal-firmware"},
188 U_BOOT_DRIVER(zynqmp_firmware) = {
189 .id = UCLASS_FIRMWARE,
190 .name = "zynqmp-firmware",
191 .of_match = zynqmp_firmware_ids,