remoteproc: stm32: add an ST stm32_rproc driver
This patch introduces a new remoteproc driver to control Cortex-M4 co-processor of the STM32 family. It provides with the following features: - start and stop - dedicated co-processor memory regions registration - coredump and recovery Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com> Signed-off-by: Ludovic Barre <ludovic.barre@st.com> Signed-off-by: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> [bjorn: Fixup of dev_dbg types and cast of int to pointer in mbox send] Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Fabien Dessenne
Bjorn Andersson
Родитель
6f576b4390
Коммит
13140de09c
|
|
@ -197,6 +197,21 @@ config ST_REMOTEPROC
|
|||
config ST_SLIM_REMOTEPROC
|
||||
tristate
|
||||
|
||||
config STM32_RPROC
|
||||
tristate "STM32 remoteproc support"
|
||||
depends on ARCH_STM32
|
||||
depends on REMOTEPROC
|
||||
select MAILBOX
|
||||
help
|
||||
Say y here to support STM32 MCU processors via the
|
||||
remote processor framework.
|
||||
|
||||
You want to say y here in order to enable AMP
|
||||
use-cases to run on your platform (dedicated firmware could be
|
||||
offloaded to remote MCU processors using this framework).
|
||||
|
||||
This can be either built-in or a loadable module.
|
||||
|
||||
endif # REMOTEPROC
|
||||
|
||||
endmenu
|
||||
|
|
|
|||
|
|
@ -26,3 +26,4 @@ qcom_wcnss_pil-y += qcom_wcnss.o
|
|||
qcom_wcnss_pil-y += qcom_wcnss_iris.o
|
||||
obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o
|
||||
obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o
|
||||
obj-$(CONFIG_STM32_RPROC) += stm32_rproc.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,628 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* Copyright (C) STMicroelectronics 2018 - All Rights Reserved
|
||||
* Authors: Ludovic Barre <ludovic.barre@st.com> for STMicroelectronics.
|
||||
* Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.
|
||||
*/
|
||||
|
||||
#include <linux/arm-smccc.h>
|
||||
#include <linux/dma-mapping.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/mailbox_client.h>
|
||||
#include <linux/mfd/syscon.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of_address.h>
|
||||
#include <linux/of_device.h>
|
||||
#include <linux/of_reserved_mem.h>
|
||||
#include <linux/regmap.h>
|
||||
#include <linux/remoteproc.h>
|
||||
#include <linux/reset.h>
|
||||
|
||||
#include "remoteproc_internal.h"
|
||||
|
||||
#define HOLD_BOOT 0
|
||||
#define RELEASE_BOOT 1
|
||||
|
||||
#define MBOX_NB_VQ 2
|
||||
#define MBOX_NB_MBX 3
|
||||
|
||||
#define STM32_SMC_RCC 0x82001000
|
||||
#define STM32_SMC_REG_WRITE 0x1
|
||||
|
||||
#define STM32_MBX_VQ0 "vq0"
|
||||
#define STM32_MBX_VQ1 "vq1"
|
||||
#define STM32_MBX_SHUTDOWN "shutdown"
|
||||
|
||||
struct stm32_syscon {
|
||||
struct regmap *map;
|
||||
u32 reg;
|
||||
u32 mask;
|
||||
};
|
||||
|
||||
struct stm32_rproc_mem {
|
||||
char name[20];
|
||||
void __iomem *cpu_addr;
|
||||
phys_addr_t bus_addr;
|
||||
u32 dev_addr;
|
||||
size_t size;
|
||||
};
|
||||
|
||||
struct stm32_rproc_mem_ranges {
|
||||
u32 dev_addr;
|
||||
u32 bus_addr;
|
||||
u32 size;
|
||||
};
|
||||
|
||||
struct stm32_mbox {
|
||||
const unsigned char name[10];
|
||||
struct mbox_chan *chan;
|
||||
struct mbox_client client;
|
||||
int vq_id;
|
||||
};
|
||||
|
||||
struct stm32_rproc {
|
||||
struct reset_control *rst;
|
||||
struct stm32_syscon hold_boot;
|
||||
struct stm32_syscon pdds;
|
||||
u32 nb_rmems;
|
||||
struct stm32_rproc_mem *rmems;
|
||||
struct stm32_mbox mb[MBOX_NB_MBX];
|
||||
bool secured_soc;
|
||||
};
|
||||
|
||||
static int stm32_rproc_pa_to_da(struct rproc *rproc, phys_addr_t pa, u64 *da)
|
||||
{
|
||||
unsigned int i;
|
||||
struct stm32_rproc *ddata = rproc->priv;
|
||||
struct stm32_rproc_mem *p_mem;
|
||||
|
||||
for (i = 0; i < ddata->nb_rmems; i++) {
|
||||
p_mem = &ddata->rmems[i];
|
||||
|
||||
if (pa < p_mem->bus_addr ||
|
||||
pa >= p_mem->bus_addr + p_mem->size)
|
||||
continue;
|
||||
*da = pa - p_mem->bus_addr + p_mem->dev_addr;
|
||||
dev_dbg(rproc->dev.parent, "pa %pa to da %llx\n", &pa, *da);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static int stm32_rproc_mem_alloc(struct rproc *rproc,
|
||||
struct rproc_mem_entry *mem)
|
||||
{
|
||||
struct device *dev = rproc->dev.parent;
|
||||
void *va;
|
||||
|
||||
dev_dbg(dev, "map memory: %pa+%x\n", &mem->dma, mem->len);
|
||||
va = ioremap_wc(mem->dma, mem->len);
|
||||
if (IS_ERR_OR_NULL(va)) {
|
||||
dev_err(dev, "Unable to map memory region: %pa+%x\n",
|
||||
&mem->dma, mem->len);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/* Update memory entry va */
|
||||
mem->va = va;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int stm32_rproc_mem_release(struct rproc *rproc,
|
||||
struct rproc_mem_entry *mem)
|
||||
{
|
||||
dev_dbg(rproc->dev.parent, "unmap memory: %pa\n", &mem->dma);
|
||||
iounmap(mem->va);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int stm32_rproc_of_memory_translations(struct rproc *rproc)
|
||||
{
|
||||
struct device *parent, *dev = rproc->dev.parent;
|
||||
struct stm32_rproc *ddata = rproc->priv;
|
||||
struct device_node *np;
|
||||
struct stm32_rproc_mem *p_mems;
|
||||
struct stm32_rproc_mem_ranges *mem_range;
|
||||
int cnt, array_size, i, ret = 0;
|
||||
|
||||
parent = dev->parent;
|
||||
np = parent->of_node;
|
||||
|
||||
cnt = of_property_count_elems_of_size(np, "dma-ranges",
|
||||
sizeof(*mem_range));
|
||||
if (cnt <= 0) {
|
||||
dev_err(dev, "%s: dma-ranges property not defined\n", __func__);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
p_mems = devm_kcalloc(dev, cnt, sizeof(*p_mems), GFP_KERNEL);
|
||||
if (!p_mems)
|
||||
return -ENOMEM;
|
||||
mem_range = kcalloc(cnt, sizeof(*mem_range), GFP_KERNEL);
|
||||
if (!mem_range)
|
||||
return -ENOMEM;
|
||||
|
||||
array_size = cnt * sizeof(struct stm32_rproc_mem_ranges) / sizeof(u32);
|
||||
|
||||
ret = of_property_read_u32_array(np, "dma-ranges",
|
||||
(u32 *)mem_range, array_size);
|
||||
if (ret) {
|
||||
dev_err(dev, "error while get dma-ranges property: %x\n", ret);
|
||||
goto free_mem;
|
||||
}
|
||||
|
||||
for (i = 0; i < cnt; i++) {
|
||||
p_mems[i].bus_addr = mem_range[i].bus_addr;
|
||||
p_mems[i].dev_addr = mem_range[i].dev_addr;
|
||||
p_mems[i].size = mem_range[i].size;
|
||||
|
||||
dev_dbg(dev, "memory range[%i]: da %#x, pa %pa, size %#zx:\n",
|
||||
i, p_mems[i].dev_addr, &p_mems[i].bus_addr,
|
||||
p_mems[i].size);
|
||||
}
|
||||
|
||||
ddata->rmems = p_mems;
|
||||
ddata->nb_rmems = cnt;
|
||||
|
||||
free_mem:
|
||||
kfree(mem_range);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int stm32_rproc_mbox_idx(struct rproc *rproc, const unsigned char *name)
|
||||
{
|
||||
struct stm32_rproc *ddata = rproc->priv;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(ddata->mb); i++) {
|
||||
if (!strncmp(ddata->mb[i].name, name, strlen(name)))
|
||||
return i;
|
||||
}
|
||||
dev_err(&rproc->dev, "mailbox %s not found\n", name);
|
||||
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static int stm32_rproc_elf_load_rsc_table(struct rproc *rproc,
|
||||
const struct firmware *fw)
|
||||
{
|
||||
if (rproc_elf_load_rsc_table(rproc, fw))
|
||||
dev_warn(&rproc->dev, "no resource table found for this firmware\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int stm32_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
|
||||
{
|
||||
struct device *dev = rproc->dev.parent;
|
||||
struct device_node *np = dev->of_node;
|
||||
struct of_phandle_iterator it;
|
||||
struct rproc_mem_entry *mem;
|
||||
struct reserved_mem *rmem;
|
||||
u64 da;
|
||||
int index = 0;
|
||||
|
||||
/* Register associated reserved memory regions */
|
||||
of_phandle_iterator_init(&it, np, "memory-region", NULL, 0);
|
||||
while (of_phandle_iterator_next(&it) == 0) {
|
||||
rmem = of_reserved_mem_lookup(it.node);
|
||||
if (!rmem) {
|
||||
dev_err(dev, "unable to acquire memory-region\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (stm32_rproc_pa_to_da(rproc, rmem->base, &da) < 0) {
|
||||
dev_err(dev, "memory region not valid %pa\n",
|
||||
&rmem->base);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* No need to map vdev buffer */
|
||||
if (strcmp(it.node->name, "vdev0buffer")) {
|
||||
/* Register memory region */
|
||||
mem = rproc_mem_entry_init(dev, NULL,
|
||||
(dma_addr_t)rmem->base,
|
||||
rmem->size, da,
|
||||
stm32_rproc_mem_alloc,
|
||||
stm32_rproc_mem_release,
|
||||
it.node->name);
|
||||
|
||||
if (mem)
|
||||
rproc_coredump_add_segment(rproc, da,
|
||||
rmem->size);
|
||||
} else {
|
||||
/* Register reserved memory for vdev buffer alloc */
|
||||
mem = rproc_of_resm_mem_entry_init(dev, index,
|
||||
rmem->size,
|
||||
rmem->base,
|
||||
it.node->name);
|
||||
}
|
||||
|
||||
if (!mem)
|
||||
return -ENOMEM;
|
||||
|
||||
rproc_add_carveout(rproc, mem);
|
||||
index++;
|
||||
}
|
||||
|
||||
return stm32_rproc_elf_load_rsc_table(rproc, fw);
|
||||
}
|
||||
|
||||
static irqreturn_t stm32_rproc_wdg(int irq, void *data)
|
||||
{
|
||||
struct rproc *rproc = data;
|
||||
|
||||
rproc_report_crash(rproc, RPROC_WATCHDOG);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static void stm32_rproc_mb_callback(struct mbox_client *cl, void *data)
|
||||
{
|
||||
struct rproc *rproc = dev_get_drvdata(cl->dev);
|
||||
struct stm32_mbox *mb = container_of(cl, struct stm32_mbox, client);
|
||||
|
||||
if (rproc_vq_interrupt(rproc, mb->vq_id) == IRQ_NONE)
|
||||
dev_dbg(&rproc->dev, "no message found in vq%d\n", mb->vq_id);
|
||||
}
|
||||
|
||||
static void stm32_rproc_free_mbox(struct rproc *rproc)
|
||||
{
|
||||
struct stm32_rproc *ddata = rproc->priv;
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(ddata->mb); i++) {
|
||||
if (ddata->mb[i].chan)
|
||||
mbox_free_channel(ddata->mb[i].chan);
|
||||
ddata->mb[i].chan = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
static const struct stm32_mbox stm32_rproc_mbox[MBOX_NB_MBX] = {
|
||||
{
|
||||
.name = STM32_MBX_VQ0,
|
||||
.vq_id = 0,
|
||||
.client = {
|
||||
.rx_callback = stm32_rproc_mb_callback,
|
||||
.tx_block = false,
|
||||
},
|
||||
},
|
||||
{
|
||||
.name = STM32_MBX_VQ1,
|
||||
.vq_id = 1,
|
||||
.client = {
|
||||
.rx_callback = stm32_rproc_mb_callback,
|
||||
.tx_block = false,
|
||||
},
|
||||
},
|
||||
{
|
||||
.name = STM32_MBX_SHUTDOWN,
|
||||
.vq_id = -1,
|
||||
.client = {
|
||||
.tx_block = true,
|
||||
.tx_done = NULL,
|
||||
.tx_tout = 500, /* 500 ms time out */
|
||||
},
|
||||
}
|
||||
};
|
||||
|
||||
static void stm32_rproc_request_mbox(struct rproc *rproc)
|
||||
{
|
||||
struct stm32_rproc *ddata = rproc->priv;
|
||||
struct device *dev = &rproc->dev;
|
||||
unsigned int i;
|
||||
const unsigned char *name;
|
||||
struct mbox_client *cl;
|
||||
|
||||
/* Initialise mailbox structure table */
|
||||
memcpy(ddata->mb, stm32_rproc_mbox, sizeof(stm32_rproc_mbox));
|
||||
|
||||
for (i = 0; i < MBOX_NB_MBX; i++) {
|
||||
name = ddata->mb[i].name;
|
||||
|
||||
cl = &ddata->mb[i].client;
|
||||
cl->dev = dev->parent;
|
||||
|
||||
ddata->mb[i].chan = mbox_request_channel_byname(cl, name);
|
||||
if (IS_ERR(ddata->mb[i].chan)) {
|
||||
dev_warn(dev, "cannot get %s mbox\n", name);
|
||||
ddata->mb[i].chan = NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int stm32_rproc_set_hold_boot(struct rproc *rproc, bool hold)
|
||||
{
|
||||
struct stm32_rproc *ddata = rproc->priv;
|
||||
struct stm32_syscon hold_boot = ddata->hold_boot;
|
||||
struct arm_smccc_res smc_res;
|
||||
int val, err;
|
||||
|
||||
val = hold ? HOLD_BOOT : RELEASE_BOOT;
|
||||
|
||||
if (ddata->secured_soc) {
|
||||
arm_smccc_smc(STM32_SMC_RCC, STM32_SMC_REG_WRITE,
|
||||
hold_boot.reg, val, 0, 0, 0, 0, &smc_res);
|
||||
err = smc_res.a0;
|
||||
} else {
|
||||
err = regmap_update_bits(hold_boot.map, hold_boot.reg,
|
||||
hold_boot.mask, val);
|
||||
}
|
||||
|
||||
if (err)
|
||||
dev_err(&rproc->dev, "failed to set hold boot\n");
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static void stm32_rproc_add_coredump_trace(struct rproc *rproc)
|
||||
{
|
||||
struct rproc_debug_trace *trace;
|
||||
struct rproc_dump_segment *segment;
|
||||
bool already_added;
|
||||
|
||||
list_for_each_entry(trace, &rproc->traces, node) {
|
||||
already_added = false;
|
||||
|
||||
list_for_each_entry(segment, &rproc->dump_segments, node) {
|
||||
if (segment->da == trace->trace_mem.da) {
|
||||
already_added = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (!already_added)
|
||||
rproc_coredump_add_segment(rproc, trace->trace_mem.da,
|
||||
trace->trace_mem.len);
|
||||
}
|
||||
}
|
||||
|
||||
static int stm32_rproc_start(struct rproc *rproc)
|
||||
{
|
||||
int err;
|
||||
|
||||
stm32_rproc_add_coredump_trace(rproc);
|
||||
|
||||
err = stm32_rproc_set_hold_boot(rproc, false);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
return stm32_rproc_set_hold_boot(rproc, true);
|
||||
}
|
||||
|
||||
static int stm32_rproc_stop(struct rproc *rproc)
|
||||
{
|
||||
struct stm32_rproc *ddata = rproc->priv;
|
||||
int err, dummy_data, idx;
|
||||
|
||||
/* request shutdown of the remote processor */
|
||||
if (rproc->state != RPROC_OFFLINE) {
|
||||
idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_SHUTDOWN);
|
||||
if (idx >= 0 && ddata->mb[idx].chan) {
|
||||
/* a dummy data is sent to allow to block on transmit */
|
||||
err = mbox_send_message(ddata->mb[idx].chan,
|
||||
&dummy_data);
|
||||
if (err < 0)
|
||||
dev_warn(&rproc->dev, "warning: remote FW shutdown without ack\n");
|
||||
}
|
||||
}
|
||||
|
||||
err = stm32_rproc_set_hold_boot(rproc, true);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
err = reset_control_assert(ddata->rst);
|
||||
if (err) {
|
||||
dev_err(&rproc->dev, "failed to assert the reset\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
/* to allow platform Standby power mode, set remote proc Deep Sleep */
|
||||
if (ddata->pdds.map) {
|
||||
err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg,
|
||||
ddata->pdds.mask, 1);
|
||||
if (err) {
|
||||
dev_err(&rproc->dev, "failed to set pdds\n");
|
||||
return err;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void stm32_rproc_kick(struct rproc *rproc, int vqid)
|
||||
{
|
||||
struct stm32_rproc *ddata = rproc->priv;
|
||||
unsigned int i;
|
||||
int err;
|
||||
|
||||
if (WARN_ON(vqid >= MBOX_NB_VQ))
|
||||
return;
|
||||
|
||||
for (i = 0; i < MBOX_NB_MBX; i++) {
|
||||
if (vqid != ddata->mb[i].vq_id)
|
||||
continue;
|
||||
if (!ddata->mb[i].chan)
|
||||
return;
|
||||
err = mbox_send_message(ddata->mb[i].chan, (void *)(long)vqid);
|
||||
if (err < 0)
|
||||
dev_err(&rproc->dev, "%s: failed (%s, err:%d)\n",
|
||||
__func__, ddata->mb[i].name, err);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
static struct rproc_ops st_rproc_ops = {
|
||||
.start = stm32_rproc_start,
|
||||
.stop = stm32_rproc_stop,
|
||||
.kick = stm32_rproc_kick,
|
||||
.load = rproc_elf_load_segments,
|
||||
.parse_fw = stm32_rproc_parse_fw,
|
||||
.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
|
||||
.sanity_check = rproc_elf_sanity_check,
|
||||
.get_boot_addr = rproc_elf_get_boot_addr,
|
||||
};
|
||||
|
||||
static const struct of_device_id stm32_rproc_match[] = {
|
||||
{ .compatible = "st,stm32mp1-m4" },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, stm32_rproc_match);
|
||||
|
||||
static int stm32_rproc_get_syscon(struct device_node *np, const char *prop,
|
||||
struct stm32_syscon *syscon)
|
||||
{
|
||||
int err = 0;
|
||||
|
||||
syscon->map = syscon_regmap_lookup_by_phandle(np, prop);
|
||||
if (IS_ERR(syscon->map)) {
|
||||
err = PTR_ERR(syscon->map);
|
||||
syscon->map = NULL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
err = of_property_read_u32_index(np, prop, 1, &syscon->reg);
|
||||
if (err)
|
||||
goto out;
|
||||
|
||||
err = of_property_read_u32_index(np, prop, 2, &syscon->mask);
|
||||
|
||||
out:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int stm32_rproc_parse_dt(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct device_node *np = dev->of_node;
|
||||
struct rproc *rproc = platform_get_drvdata(pdev);
|
||||
struct stm32_rproc *ddata = rproc->priv;
|
||||
struct stm32_syscon tz;
|
||||
unsigned int tzen;
|
||||
int err, irq;
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
if (irq > 0) {
|
||||
err = devm_request_irq(dev, irq, stm32_rproc_wdg, 0,
|
||||
dev_name(dev), rproc);
|
||||
if (err) {
|
||||
dev_err(dev, "failed to request wdg irq\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
dev_info(dev, "wdg irq registered\n");
|
||||
}
|
||||
|
||||
ddata->rst = devm_reset_control_get_by_index(dev, 0);
|
||||
if (IS_ERR(ddata->rst)) {
|
||||
dev_err(dev, "failed to get mcu reset\n");
|
||||
return PTR_ERR(ddata->rst);
|
||||
}
|
||||
|
||||
/*
|
||||
* if platform is secured the hold boot bit must be written by
|
||||
* smc call and read normally.
|
||||
* if not secure the hold boot bit could be read/write normally
|
||||
*/
|
||||
err = stm32_rproc_get_syscon(np, "st,syscfg-tz", &tz);
|
||||
if (err) {
|
||||
dev_err(dev, "failed to get tz syscfg\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
err = regmap_read(tz.map, tz.reg, &tzen);
|
||||
if (err) {
|
||||
dev_err(&rproc->dev, "failed to read tzen\n");
|
||||
return err;
|
||||
}
|
||||
ddata->secured_soc = tzen & tz.mask;
|
||||
|
||||
err = stm32_rproc_get_syscon(np, "st,syscfg-holdboot",
|
||||
&ddata->hold_boot);
|
||||
if (err) {
|
||||
dev_err(dev, "failed to get hold boot\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
err = stm32_rproc_get_syscon(np, "st,syscfg-pdds", &ddata->pdds);
|
||||
if (err)
|
||||
dev_warn(dev, "failed to get pdds\n");
|
||||
|
||||
rproc->auto_boot = of_property_read_bool(np, "st,auto-boot");
|
||||
|
||||
return stm32_rproc_of_memory_translations(rproc);
|
||||
}
|
||||
|
||||
static int stm32_rproc_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct stm32_rproc *ddata;
|
||||
struct device_node *np = dev->of_node;
|
||||
struct rproc *rproc;
|
||||
int ret;
|
||||
|
||||
ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
rproc = rproc_alloc(dev, np->name, &st_rproc_ops, NULL, sizeof(*ddata));
|
||||
if (!rproc)
|
||||
return -ENOMEM;
|
||||
|
||||
rproc->has_iommu = false;
|
||||
ddata = rproc->priv;
|
||||
|
||||
platform_set_drvdata(pdev, rproc);
|
||||
|
||||
ret = stm32_rproc_parse_dt(pdev);
|
||||
if (ret)
|
||||
goto free_rproc;
|
||||
|
||||
stm32_rproc_request_mbox(rproc);
|
||||
|
||||
ret = rproc_add(rproc);
|
||||
if (ret)
|
||||
goto free_mb;
|
||||
|
||||
return 0;
|
||||
|
||||
free_mb:
|
||||
stm32_rproc_free_mbox(rproc);
|
||||
free_rproc:
|
||||
rproc_free(rproc);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int stm32_rproc_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct rproc *rproc = platform_get_drvdata(pdev);
|
||||
|
||||
if (atomic_read(&rproc->power) > 0)
|
||||
rproc_shutdown(rproc);
|
||||
|
||||
rproc_del(rproc);
|
||||
stm32_rproc_free_mbox(rproc);
|
||||
rproc_free(rproc);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver stm32_rproc_driver = {
|
||||
.probe = stm32_rproc_probe,
|
||||
.remove = stm32_rproc_remove,
|
||||
.driver = {
|
||||
.name = "stm32-rproc",
|
||||
.of_match_table = of_match_ptr(stm32_rproc_match),
|
||||
},
|
||||
};
|
||||
module_platform_driver(stm32_rproc_driver);
|
||||
|
||||
MODULE_DESCRIPTION("STM32 Remote Processor Control Driver");
|
||||
MODULE_AUTHOR("Ludovic Barre <ludovic.barre@st.com>");
|
||||
MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
||||
Загрузка…
Ссылка в новой задаче