diff options
Diffstat (limited to 'drivers/firmware/firmware-zynqmp.c')
| -rw-r--r-- | drivers/firmware/firmware-zynqmp.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/drivers/firmware/firmware-zynqmp.c b/drivers/firmware/firmware-zynqmp.c new file mode 100644 index 00000000000..15e82ac3b31 --- /dev/null +++ b/drivers/firmware/firmware-zynqmp.c @@ -0,0 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Xilinx Zynq MPSoC Firmware driver + * + * Copyright (C) 2018-2019 Xilinx, Inc. + */ + +#include <common.h> +#include <dm.h> + +#if defined(CONFIG_ZYNQMP_IPI) +#include <mailbox.h> +#include <zynqmp_firmware.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)) + return ipi_req(req, req_len, res, res_maxlen); + + return invoke_smc(req[0] + PM_SIP_SVC, 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 = 0; + + debug("%s, (dev=%p)\n", __func__, dev); + + ret = mbox_get_by_name(dev, "tx", &zynqmp_power.tx_chan); + if (ret) { + debug("%s, cannot tx mailbox\n", __func__); + return ret; + } + + ret = mbox_get_by_name(dev, "rx", &zynqmp_power.rx_chan); + if (ret) { + debug("%s, cannot 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 + +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, +}; |