u-boot/drivers/firmware/firmware-zynqmp.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Xilinx Zynq MPSoC Firmware driver
*
* Copyright (C) 2018-2019 Xilinx, Inc.
*/
#include <common.h>
#include <cpu_func.h>
#include <dm.h>
#include <dm/lists.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
#define XST_PM_ALREADY_CONFIGURED 2009L
struct zynqmp_power {
struct mbox_chan tx_chan;
struct mbox_chan rx_chan;
} zynqmp_power = {};
#define NODE_ID_LOCATION 5
static unsigned int xpm_configobject[] = {
/**********************************************************************/
/* HEADER */
2, /* Number of remaining words in the header */
1, /* Number of sections included in config object */
PM_CONFIG_OBJECT_TYPE_OVERLAY, /* Type of Config object as overlay */
/**********************************************************************/
/* SLAVE SECTION */
PM_CONFIG_SLAVE_SECTION_ID, /* Section ID */
1, /* Number of slaves */
0, /* Node ID which will be changed below */
PM_SLAVE_FLAG_IS_SHAREABLE,
PM_CONFIG_IPI_PSU_CORTEXA53_0_MASK |
PM_CONFIG_IPI_PSU_CORTEXR5_0_MASK |
PM_CONFIG_IPI_PSU_CORTEXR5_1_MASK, /* IPI Mask */
};
static unsigned int xpm_configobject_close[] = {
/**********************************************************************/
/* HEADER */
2, /* Number of remaining words in the header */
1, /* Number of sections included in config object */
PM_CONFIG_OBJECT_TYPE_OVERLAY, /* Type of Config object as overlay */
/**********************************************************************/
/* SET CONFIG SECTION */
PM_CONFIG_SET_CONFIG_SECTION_ID,
0U, /* Loading permission to Overlay config object */
};
int zynqmp_pmufw_config_close(void)
{
zynqmp_pmufw_load_config_object(xpm_configobject_close,
sizeof(xpm_configobject_close));
return 0;
}
int zynqmp_pmufw_node(u32 id)
{
static bool skip_config;
int ret;
if (skip_config)
return 0;
/* Record power domain id */
xpm_configobject[NODE_ID_LOCATION] = id;
ret = zynqmp_pmufw_load_config_object(xpm_configobject,
sizeof(xpm_configobject));
if (ret && id == NODE_APU_0)
skip_config = true;
return 0;
}
static int do_pm_probe(void)
{
struct udevice *dev;
int ret;
ret = uclass_get_device_by_driver(UCLASS_FIRMWARE,
DM_DRIVER_GET(zynqmp_power),
&dev);
if (ret)
debug("%s: Probing device failed: %d\n", __func__, ret);
return ret;
}
static int ipi_req(const u32 *req, size_t req_len, u32 *res, size_t res_maxlen)
{
struct zynqmp_ipi_msg msg;
int ret;
u32 buffer[PAYLOAD_ARG_CNT];
if (!res)
res = buffer;
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)) {
ret = do_pm_probe();
if (ret)
return ret;
}
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;
};
int zynqmp_pm_set_gem_config(u32 node, enum pm_gem_config_type config, u32 value)
{
int ret;
ret = xilinx_pm_request(PM_IOCTL, node, IOCTL_SET_GEM_CONFIG,
config, value, NULL);
if (ret)
printf("%s: node %d: set_gem_config %d failed\n",
__func__, node, config);
return ret;
}
int zynqmp_pm_set_sd_config(u32 node, enum pm_sd_config_type config, u32 value)
{
int ret;
ret = xilinx_pm_request(PM_IOCTL, node, IOCTL_SET_SD_CONFIG,
config, value, NULL);
if (ret)
printf("%s: node %d: set_sd_config %d failed\n",
__func__, node, config);
return ret;
}
int zynqmp_pm_is_function_supported(const u32 api_id, const u32 id)
{
int ret;
u32 *bit_mask;
u32 ret_payload[PAYLOAD_ARG_CNT];
/* Input arguments validation */
if (id >= 64 || (api_id != PM_IOCTL && api_id != PM_QUERY_DATA))
return -EINVAL;
/* Check feature check API version */
ret = xilinx_pm_request(PM_FEATURE_CHECK, PM_FEATURE_CHECK, 0, 0, 0,
ret_payload);
if (ret)
return ret;
/* Check if feature check version 2 is supported or not */
if ((ret_payload[1] & FIRMWARE_VERSION_MASK) == PM_API_VERSION_2) {
/*
* Call feature check for IOCTL/QUERY API to get IOCTL ID or
* QUERY ID feature status.
*/
ret = xilinx_pm_request(PM_FEATURE_CHECK, api_id, 0, 0, 0,
ret_payload);
if (ret)
return ret;
bit_mask = &ret_payload[2];
if ((bit_mask[(id / 32)] & BIT((id % 32))) == 0)
return -EOPNOTSUPP;
} else {
return -ENODATA;
}
return 0;
}
/**
* Send a configuration object to the PMU firmware.
*
* @cfg_obj: Pointer to the configuration object
* @size: Size of @cfg_obj in bytes
*/
int zynqmp_pmufw_load_config_object(const void *cfg_obj, size_t size)
{
int err;
u32 ret_payload[PAYLOAD_ARG_CNT];
if (IS_ENABLED(CONFIG_SPL_BUILD))
printf("Loading new PMUFW cfg obj (%ld bytes)\n", size);
flush_dcache_range((ulong)cfg_obj, (ulong)(cfg_obj + 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 -EACCES;
}
if (err == XST_PM_ALREADY_CONFIGURED) {
debug("PMUFW Node is already configured\n");
return -ENODEV;
}
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");
return 0;
}
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);
if (IS_ENABLED(CONFIG_ARCH_ZYNQMP))
zynqmp_pmufw_node(NODE_APU_0);
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};
int ret;
if (api_id == PM_FPGA_LOAD) {
/* Swap addr_hi/low because of incompatibility */
u32 temp = regs[1];
regs[1] = regs[2];
regs[2] = temp;
}
ret = ipi_req(regs, PAYLOAD_ARG_CNT, ret_payload,
PAYLOAD_ARG_CNT);
if (ret)
return ret;
#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(&regs);
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"},
{ }
};
static int zynqmp_firmware_bind(struct udevice *dev)
{
int ret;
struct udevice *child;
if ((IS_ENABLED(CONFIG_SPL_BUILD) &&
IS_ENABLED(CONFIG_SPL_POWER_DOMAIN) &&
IS_ENABLED(CONFIG_ZYNQMP_POWER_DOMAIN)) ||
(!IS_ENABLED(CONFIG_SPL_BUILD) &&
IS_ENABLED(CONFIG_ZYNQMP_POWER_DOMAIN))) {
ret = device_bind_driver_to_node(dev, "zynqmp_power_domain",
"zynqmp_power_domain",
dev_ofnode(dev), &child);
if (ret) {
printf("zynqmp power domain driver is not bound: %d\n", ret);
return ret;
}
}
return dm_scan_fdt_dev(dev);
}
U_BOOT_DRIVER(zynqmp_firmware) = {
.id = UCLASS_FIRMWARE,
.name = "zynqmp_firmware",
.of_match = zynqmp_firmware_ids,
.bind = zynqmp_firmware_bind,
};