mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-30 15:03:18 +00:00
270 lines
6.8 KiB
C
270 lines
6.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
|
|
/*
|
|
* Copyright (C) 2019, STMicroelectronics - All Rights Reserved
|
|
*/
|
|
#define pr_fmt(fmt) "%s: " fmt, __func__
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <fdtdec.h>
|
|
#include <log.h>
|
|
#include <regmap.h>
|
|
#include <remoteproc.h>
|
|
#include <reset.h>
|
|
#include <syscon.h>
|
|
#include <asm/io.h>
|
|
#include <dm/device_compat.h>
|
|
#include <linux/err.h>
|
|
|
|
#define RCC_GCR_HOLD_BOOT 0
|
|
#define RCC_GCR_RELEASE_BOOT 1
|
|
|
|
/**
|
|
* struct stm32_copro_privdata - power processor private data
|
|
* @reset_ctl: reset controller handle
|
|
* @hold_boot_regmap: regmap for remote processor reset hold boot
|
|
* @hold_boot_offset: offset of the register controlling the hold boot setting
|
|
* @hold_boot_mask: bitmask of the register for the hold boot field
|
|
* @rsc_table_addr: resource table address
|
|
*/
|
|
struct stm32_copro_privdata {
|
|
struct reset_ctl reset_ctl;
|
|
struct regmap *hold_boot_regmap;
|
|
uint hold_boot_offset;
|
|
uint hold_boot_mask;
|
|
ulong rsc_table_addr;
|
|
};
|
|
|
|
/**
|
|
* stm32_copro_probe() - Basic probe
|
|
* @dev: corresponding STM32 remote processor device
|
|
* @return 0 if all went ok, else corresponding -ve error
|
|
*/
|
|
static int stm32_copro_probe(struct udevice *dev)
|
|
{
|
|
struct stm32_copro_privdata *priv;
|
|
struct regmap *regmap;
|
|
const fdt32_t *cell;
|
|
int len, ret;
|
|
|
|
priv = dev_get_priv(dev);
|
|
|
|
regmap = syscon_regmap_lookup_by_phandle(dev, "st,syscfg-holdboot");
|
|
if (IS_ERR(regmap)) {
|
|
dev_err(dev, "unable to find holdboot regmap (%ld)\n",
|
|
PTR_ERR(regmap));
|
|
return PTR_ERR(regmap);
|
|
}
|
|
|
|
cell = dev_read_prop(dev, "st,syscfg-holdboot", &len);
|
|
if (len < 3 * sizeof(fdt32_t)) {
|
|
dev_err(dev, "holdboot offset and mask not available\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
priv->hold_boot_regmap = regmap;
|
|
priv->hold_boot_offset = fdtdec_get_number(cell + 1, 1);
|
|
priv->hold_boot_mask = fdtdec_get_number(cell + 2, 1);
|
|
|
|
ret = reset_get_by_index(dev, 0, &priv->reset_ctl);
|
|
if (ret) {
|
|
dev_err(dev, "failed to get reset (%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
dev_dbg(dev, "probed\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* stm32_copro_set_hold_boot() - Hold boot bit management
|
|
* @dev: corresponding STM32 remote processor device
|
|
* @hold: hold boot value
|
|
* @return 0 if all went ok, else corresponding -ve error
|
|
*/
|
|
static int stm32_copro_set_hold_boot(struct udevice *dev, bool hold)
|
|
{
|
|
struct stm32_copro_privdata *priv;
|
|
uint val;
|
|
int ret;
|
|
|
|
priv = dev_get_priv(dev);
|
|
|
|
val = hold ? RCC_GCR_HOLD_BOOT : RCC_GCR_RELEASE_BOOT;
|
|
|
|
/*
|
|
* Note: shall run an SMC call (STM32_SMC_RCC) if platform is secured.
|
|
* To be updated when the code for this SMC service is available which
|
|
* is not the case for the time being.
|
|
*/
|
|
ret = regmap_update_bits(priv->hold_boot_regmap, priv->hold_boot_offset,
|
|
priv->hold_boot_mask, val);
|
|
if (ret)
|
|
dev_err(dev, "failed to set hold boot\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* stm32_copro_device_to_virt() - Convert device address to virtual address
|
|
* @dev: corresponding STM32 remote processor device
|
|
* @da: device address
|
|
* @size: Size of the memory region @da is pointing to
|
|
* @return converted virtual address
|
|
*/
|
|
static void *stm32_copro_device_to_virt(struct udevice *dev, ulong da,
|
|
ulong size)
|
|
{
|
|
fdt32_t in_addr = cpu_to_be32(da), end_addr;
|
|
u64 paddr;
|
|
|
|
paddr = dev_translate_dma_address(dev, &in_addr);
|
|
if (paddr == OF_BAD_ADDR) {
|
|
dev_err(dev, "Unable to convert address %ld\n", da);
|
|
return NULL;
|
|
}
|
|
|
|
end_addr = cpu_to_be32(da + size - 1);
|
|
if (dev_translate_dma_address(dev, &end_addr) == OF_BAD_ADDR) {
|
|
dev_err(dev, "Unable to convert address %ld\n", da + size - 1);
|
|
return NULL;
|
|
}
|
|
|
|
return phys_to_virt(paddr);
|
|
}
|
|
|
|
/**
|
|
* stm32_copro_load() - Loadup the STM32 remote processor
|
|
* @dev: corresponding STM32 remote processor device
|
|
* @addr: Address in memory where image is stored
|
|
* @size: Size in bytes of the image
|
|
* @return 0 if all went ok, else corresponding -ve error
|
|
*/
|
|
static int stm32_copro_load(struct udevice *dev, ulong addr, ulong size)
|
|
{
|
|
struct stm32_copro_privdata *priv;
|
|
ulong rsc_table_size;
|
|
int ret;
|
|
|
|
priv = dev_get_priv(dev);
|
|
|
|
ret = stm32_copro_set_hold_boot(dev, true);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = reset_assert(&priv->reset_ctl);
|
|
if (ret) {
|
|
dev_err(dev, "Unable to assert reset line (ret=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (rproc_elf32_load_rsc_table(dev, addr, size, &priv->rsc_table_addr,
|
|
&rsc_table_size)) {
|
|
priv->rsc_table_addr = 0;
|
|
dev_warn(dev, "No valid resource table for this firmware\n");
|
|
}
|
|
|
|
return rproc_elf32_load_image(dev, addr, size);
|
|
}
|
|
|
|
/**
|
|
* stm32_copro_start() - Start the STM32 remote processor
|
|
* @dev: corresponding STM32 remote processor device
|
|
* @return 0 if all went ok, else corresponding -ve error
|
|
*/
|
|
static int stm32_copro_start(struct udevice *dev)
|
|
{
|
|
struct stm32_copro_privdata *priv;
|
|
int ret;
|
|
|
|
priv = dev_get_priv(dev);
|
|
|
|
/* move hold boot from true to false start the copro */
|
|
ret = stm32_copro_set_hold_boot(dev, false);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* Once copro running, reset hold boot flag to avoid copro
|
|
* rebooting autonomously
|
|
*/
|
|
ret = stm32_copro_set_hold_boot(dev, true);
|
|
writel(ret ? TAMP_COPRO_STATE_OFF : TAMP_COPRO_STATE_CRUN,
|
|
TAMP_COPRO_STATE);
|
|
if (!ret)
|
|
/* Store rsc_address in bkp register */
|
|
writel(priv->rsc_table_addr, TAMP_COPRO_RSC_TBL_ADDRESS);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* stm32_copro_reset() - Reset the STM32 remote processor
|
|
* @dev: corresponding STM32 remote processor device
|
|
* @return 0 if all went ok, else corresponding -ve error
|
|
*/
|
|
static int stm32_copro_reset(struct udevice *dev)
|
|
{
|
|
struct stm32_copro_privdata *priv;
|
|
int ret;
|
|
|
|
priv = dev_get_priv(dev);
|
|
|
|
ret = stm32_copro_set_hold_boot(dev, true);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = reset_assert(&priv->reset_ctl);
|
|
if (ret) {
|
|
dev_err(dev, "Unable to assert reset line (ret=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
writel(TAMP_COPRO_STATE_OFF, TAMP_COPRO_STATE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* stm32_copro_stop() - Stop the STM32 remote processor
|
|
* @dev: corresponding STM32 remote processor device
|
|
* @return 0 if all went ok, else corresponding -ve error
|
|
*/
|
|
static int stm32_copro_stop(struct udevice *dev)
|
|
{
|
|
return stm32_copro_reset(dev);
|
|
}
|
|
|
|
/**
|
|
* stm32_copro_is_running() - Is the STM32 remote processor running
|
|
* @dev: corresponding STM32 remote processor device
|
|
* @return 0 if the remote processor is running, 1 otherwise
|
|
*/
|
|
static int stm32_copro_is_running(struct udevice *dev)
|
|
{
|
|
return (readl(TAMP_COPRO_STATE) == TAMP_COPRO_STATE_OFF);
|
|
}
|
|
|
|
static const struct dm_rproc_ops stm32_copro_ops = {
|
|
.load = stm32_copro_load,
|
|
.start = stm32_copro_start,
|
|
.stop = stm32_copro_stop,
|
|
.reset = stm32_copro_reset,
|
|
.is_running = stm32_copro_is_running,
|
|
.device_to_virt = stm32_copro_device_to_virt,
|
|
};
|
|
|
|
static const struct udevice_id stm32_copro_ids[] = {
|
|
{.compatible = "st,stm32mp1-m4"},
|
|
{}
|
|
};
|
|
|
|
U_BOOT_DRIVER(stm32_copro) = {
|
|
.name = "stm32_m4_proc",
|
|
.of_match = stm32_copro_ids,
|
|
.id = UCLASS_REMOTEPROC,
|
|
.ops = &stm32_copro_ops,
|
|
.probe = stm32_copro_probe,
|
|
.priv_auto_alloc_size = sizeof(struct stm32_copro_privdata),
|
|
};
|