// 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
+
+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;
+
+ 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;
+}
+
+static int send_req(const u32 *req, size_t req_len, u32 *res, size_t res_maxlen)
+{
+ if (IS_ENABLED(CONFIG_SPL_BUILD) || current_el() == 3)
+ return ipi_req(req, req_len, res, res_maxlen);
+
+ return xilinx_pm_request(req[0], 0, 0, 0, 0, res);
+}
+
+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) {
+ const u32 request[] = { PM_GET_API_VERSION };
+
+ ret = send_req(request, ARRAY_SIZE(request), ret_payload, 2);
+ 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)
+{
+ const u32 request[] = {
+ PM_SET_CONFIGURATION,
+ (u32)((u64)cfg_obj)
+ };
+ u32 response;
+ int err;
+
+ printf("Loading new PMUFW cfg obj (%ld bytes)\n", size);
+
+ err = send_req(request, ARRAY_SIZE(request), &response, 1);
+ if (err)
+ panic("Cannot load PMUFW configuration object (%d)\n", err);
+ if (response != 0)
+ panic("PMUFW returned 0x%08x status!\n", response);
+}
+
+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)
+{
+ /*
+ * Added SIP service call Function Identifier
+ * Make sure to stay in x0 register
+ */
+ struct pt_regs regs;
+
+ if (current_el() == 3) {
+ printf("%s: Can't call SMC from EL3 context\n", __func__);
+ return -EPERM;
+ }
+
+ 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 regs.regs[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",
- .probe = dm_scan_fdt_dev,
.of_match = zynqmp_firmware_ids,
};