diff options
Diffstat (limited to 'roms/u-boot/drivers/firmware/firmware-zynqmp.c')
| -rw-r--r-- | roms/u-boot/drivers/firmware/firmware-zynqmp.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/firmware/firmware-zynqmp.c b/roms/u-boot/drivers/firmware/firmware-zynqmp.c new file mode 100644 index 000000000..d4dc856ba --- /dev/null +++ b/roms/u-boot/drivers/firmware/firmware-zynqmp.c @@ -0,0 +1,215 @@ +// 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, +}; |