336 lines
8.3 KiB
C
336 lines
8.3 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* SLIM core rproc driver
|
||
|
|
*
|
||
|
|
* Copyright (C) 2016 STMicroelectronics
|
||
|
|
*
|
||
|
|
* Author: Peter Griffin <peter.griffin@linaro.org>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/clk.h>
|
||
|
|
#include <linux/err.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/of.h>
|
||
|
|
#include <linux/of_device.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/remoteproc.h>
|
||
|
|
#include <linux/remoteproc/st_slim_rproc.h>
|
||
|
|
#include "remoteproc_internal.h"
|
||
|
|
|
||
|
|
/* SLIM core registers */
|
||
|
|
#define SLIM_ID_OFST 0x0
|
||
|
|
#define SLIM_VER_OFST 0x4
|
||
|
|
|
||
|
|
#define SLIM_EN_OFST 0x8
|
||
|
|
#define SLIM_EN_RUN BIT(0)
|
||
|
|
|
||
|
|
#define SLIM_CLK_GATE_OFST 0xC
|
||
|
|
#define SLIM_CLK_GATE_DIS BIT(0)
|
||
|
|
#define SLIM_CLK_GATE_RESET BIT(2)
|
||
|
|
|
||
|
|
#define SLIM_SLIM_PC_OFST 0x20
|
||
|
|
|
||
|
|
/* DMEM registers */
|
||
|
|
#define SLIM_REV_ID_OFST 0x0
|
||
|
|
#define SLIM_REV_ID_MIN_MASK GENMASK(15, 8)
|
||
|
|
#define SLIM_REV_ID_MIN(id) ((id & SLIM_REV_ID_MIN_MASK) >> 8)
|
||
|
|
#define SLIM_REV_ID_MAJ_MASK GENMASK(23, 16)
|
||
|
|
#define SLIM_REV_ID_MAJ(id) ((id & SLIM_REV_ID_MAJ_MASK) >> 16)
|
||
|
|
|
||
|
|
|
||
|
|
/* peripherals registers */
|
||
|
|
#define SLIM_STBUS_SYNC_OFST 0xF88
|
||
|
|
#define SLIM_STBUS_SYNC_DIS BIT(0)
|
||
|
|
|
||
|
|
#define SLIM_INT_SET_OFST 0xFD4
|
||
|
|
#define SLIM_INT_CLR_OFST 0xFD8
|
||
|
|
#define SLIM_INT_MASK_OFST 0xFDC
|
||
|
|
|
||
|
|
#define SLIM_CMD_CLR_OFST 0xFC8
|
||
|
|
#define SLIM_CMD_MASK_OFST 0xFCC
|
||
|
|
|
||
|
|
static const char *mem_names[ST_SLIM_MEM_MAX] = {
|
||
|
|
[ST_SLIM_DMEM] = "dmem",
|
||
|
|
[ST_SLIM_IMEM] = "imem",
|
||
|
|
};
|
||
|
|
|
||
|
|
static int slim_clk_get(struct st_slim_rproc *slim_rproc, struct device *dev)
|
||
|
|
{
|
||
|
|
int clk, err;
|
||
|
|
|
||
|
|
for (clk = 0; clk < ST_SLIM_MAX_CLK; clk++) {
|
||
|
|
slim_rproc->clks[clk] = of_clk_get(dev->of_node, clk);
|
||
|
|
if (IS_ERR(slim_rproc->clks[clk])) {
|
||
|
|
err = PTR_ERR(slim_rproc->clks[clk]);
|
||
|
|
if (err == -EPROBE_DEFER)
|
||
|
|
goto err_put_clks;
|
||
|
|
slim_rproc->clks[clk] = NULL;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_put_clks:
|
||
|
|
while (--clk >= 0)
|
||
|
|
clk_put(slim_rproc->clks[clk]);
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void slim_clk_disable(struct st_slim_rproc *slim_rproc)
|
||
|
|
{
|
||
|
|
int clk;
|
||
|
|
|
||
|
|
for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
|
||
|
|
clk_disable_unprepare(slim_rproc->clks[clk]);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int slim_clk_enable(struct st_slim_rproc *slim_rproc)
|
||
|
|
{
|
||
|
|
int clk, ret;
|
||
|
|
|
||
|
|
for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++) {
|
||
|
|
ret = clk_prepare_enable(slim_rproc->clks[clk]);
|
||
|
|
if (ret)
|
||
|
|
goto err_disable_clks;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_disable_clks:
|
||
|
|
while (--clk >= 0)
|
||
|
|
clk_disable_unprepare(slim_rproc->clks[clk]);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Remoteproc slim specific device handlers
|
||
|
|
*/
|
||
|
|
static int slim_rproc_start(struct rproc *rproc)
|
||
|
|
{
|
||
|
|
struct device *dev = &rproc->dev;
|
||
|
|
struct st_slim_rproc *slim_rproc = rproc->priv;
|
||
|
|
unsigned long hw_id, hw_ver, fw_rev;
|
||
|
|
u32 val;
|
||
|
|
|
||
|
|
/* disable CPU pipeline clock & reset CPU pipeline */
|
||
|
|
val = SLIM_CLK_GATE_DIS | SLIM_CLK_GATE_RESET;
|
||
|
|
writel(val, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
|
||
|
|
|
||
|
|
/* disable SLIM core STBus sync */
|
||
|
|
writel(SLIM_STBUS_SYNC_DIS, slim_rproc->peri + SLIM_STBUS_SYNC_OFST);
|
||
|
|
|
||
|
|
/* enable cpu pipeline clock */
|
||
|
|
writel(!SLIM_CLK_GATE_DIS,
|
||
|
|
slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
|
||
|
|
|
||
|
|
/* clear int & cmd mailbox */
|
||
|
|
writel(~0U, slim_rproc->peri + SLIM_INT_CLR_OFST);
|
||
|
|
writel(~0U, slim_rproc->peri + SLIM_CMD_CLR_OFST);
|
||
|
|
|
||
|
|
/* enable all channels cmd & int */
|
||
|
|
writel(~0U, slim_rproc->peri + SLIM_INT_MASK_OFST);
|
||
|
|
writel(~0U, slim_rproc->peri + SLIM_CMD_MASK_OFST);
|
||
|
|
|
||
|
|
/* enable cpu */
|
||
|
|
writel(SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
|
||
|
|
|
||
|
|
hw_id = readl_relaxed(slim_rproc->slimcore + SLIM_ID_OFST);
|
||
|
|
hw_ver = readl_relaxed(slim_rproc->slimcore + SLIM_VER_OFST);
|
||
|
|
|
||
|
|
fw_rev = readl(slim_rproc->mem[ST_SLIM_DMEM].cpu_addr +
|
||
|
|
SLIM_REV_ID_OFST);
|
||
|
|
|
||
|
|
dev_info(dev, "fw rev:%ld.%ld on SLIM %ld.%ld\n",
|
||
|
|
SLIM_REV_ID_MAJ(fw_rev), SLIM_REV_ID_MIN(fw_rev),
|
||
|
|
hw_id, hw_ver);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int slim_rproc_stop(struct rproc *rproc)
|
||
|
|
{
|
||
|
|
struct st_slim_rproc *slim_rproc = rproc->priv;
|
||
|
|
u32 val;
|
||
|
|
|
||
|
|
/* mask all (cmd & int) channels */
|
||
|
|
writel(0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
|
||
|
|
writel(0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);
|
||
|
|
|
||
|
|
/* disable cpu pipeline clock */
|
||
|
|
writel(SLIM_CLK_GATE_DIS, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
|
||
|
|
|
||
|
|
writel(!SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
|
||
|
|
|
||
|
|
val = readl(slim_rproc->slimcore + SLIM_EN_OFST);
|
||
|
|
if (val & SLIM_EN_RUN)
|
||
|
|
dev_warn(&rproc->dev, "Failed to disable SLIM");
|
||
|
|
|
||
|
|
dev_dbg(&rproc->dev, "slim stopped\n");
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
|
||
|
|
{
|
||
|
|
struct st_slim_rproc *slim_rproc = rproc->priv;
|
||
|
|
void *va = NULL;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
for (i = 0; i < ST_SLIM_MEM_MAX; i++) {
|
||
|
|
if (da != slim_rproc->mem[i].bus_addr)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
if (len <= slim_rproc->mem[i].size) {
|
||
|
|
/* __force to make sparse happy with type conversion */
|
||
|
|
va = (__force void *)slim_rproc->mem[i].cpu_addr;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%zx va = 0x%pK\n",
|
||
|
|
da, len, va);
|
||
|
|
|
||
|
|
return va;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct rproc_ops slim_rproc_ops = {
|
||
|
|
.start = slim_rproc_start,
|
||
|
|
.stop = slim_rproc_stop,
|
||
|
|
.da_to_va = slim_rproc_da_to_va,
|
||
|
|
.get_boot_addr = rproc_elf_get_boot_addr,
|
||
|
|
.load = rproc_elf_load_segments,
|
||
|
|
.sanity_check = rproc_elf_sanity_check,
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* st_slim_rproc_alloc() - allocate and initialise slim rproc
|
||
|
|
* @pdev: Pointer to the platform_device struct
|
||
|
|
* @fw_name: Name of firmware for rproc to use
|
||
|
|
*
|
||
|
|
* Function for allocating and initialising a slim rproc for use by
|
||
|
|
* device drivers whose IP is based around the SLIM core. It
|
||
|
|
* obtains and enables any clocks required by the SLIM core and also
|
||
|
|
* ioremaps the various IO.
|
||
|
|
*
|
||
|
|
* Return: st_slim_rproc pointer or PTR_ERR() on error.
|
||
|
|
*/
|
||
|
|
|
||
|
|
struct st_slim_rproc *st_slim_rproc_alloc(struct platform_device *pdev,
|
||
|
|
char *fw_name)
|
||
|
|
{
|
||
|
|
struct device *dev = &pdev->dev;
|
||
|
|
struct st_slim_rproc *slim_rproc;
|
||
|
|
struct device_node *np = dev->of_node;
|
||
|
|
struct rproc *rproc;
|
||
|
|
struct resource *res;
|
||
|
|
int err, i;
|
||
|
|
|
||
|
|
if (!fw_name)
|
||
|
|
return ERR_PTR(-EINVAL);
|
||
|
|
|
||
|
|
if (!of_device_is_compatible(np, "st,slim-rproc"))
|
||
|
|
return ERR_PTR(-EINVAL);
|
||
|
|
|
||
|
|
rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
|
||
|
|
fw_name, sizeof(*slim_rproc));
|
||
|
|
if (!rproc)
|
||
|
|
return ERR_PTR(-ENOMEM);
|
||
|
|
|
||
|
|
rproc->has_iommu = false;
|
||
|
|
|
||
|
|
slim_rproc = rproc->priv;
|
||
|
|
slim_rproc->rproc = rproc;
|
||
|
|
|
||
|
|
/* get imem and dmem */
|
||
|
|
for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
|
||
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
|
||
|
|
mem_names[i]);
|
||
|
|
|
||
|
|
slim_rproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
|
||
|
|
if (IS_ERR(slim_rproc->mem[i].cpu_addr)) {
|
||
|
|
dev_err(&pdev->dev, "devm_ioremap_resource failed\n");
|
||
|
|
err = PTR_ERR(slim_rproc->mem[i].cpu_addr);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
slim_rproc->mem[i].bus_addr = res->start;
|
||
|
|
slim_rproc->mem[i].size = resource_size(res);
|
||
|
|
}
|
||
|
|
|
||
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "slimcore");
|
||
|
|
slim_rproc->slimcore = devm_ioremap_resource(dev, res);
|
||
|
|
if (IS_ERR(slim_rproc->slimcore)) {
|
||
|
|
dev_err(&pdev->dev, "failed to ioremap slimcore IO\n");
|
||
|
|
err = PTR_ERR(slim_rproc->slimcore);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "peripherals");
|
||
|
|
slim_rproc->peri = devm_ioremap_resource(dev, res);
|
||
|
|
if (IS_ERR(slim_rproc->peri)) {
|
||
|
|
dev_err(&pdev->dev, "failed to ioremap peripherals IO\n");
|
||
|
|
err = PTR_ERR(slim_rproc->peri);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
err = slim_clk_get(slim_rproc, dev);
|
||
|
|
if (err)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
err = slim_clk_enable(slim_rproc);
|
||
|
|
if (err) {
|
||
|
|
dev_err(dev, "Failed to enable clocks\n");
|
||
|
|
goto err_clk_put;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Register as a remoteproc device */
|
||
|
|
err = rproc_add(rproc);
|
||
|
|
if (err) {
|
||
|
|
dev_err(dev, "registration of slim remoteproc failed\n");
|
||
|
|
goto err_clk_dis;
|
||
|
|
}
|
||
|
|
|
||
|
|
return slim_rproc;
|
||
|
|
|
||
|
|
err_clk_dis:
|
||
|
|
slim_clk_disable(slim_rproc);
|
||
|
|
err_clk_put:
|
||
|
|
for (i = 0; i < ST_SLIM_MAX_CLK && slim_rproc->clks[i]; i++)
|
||
|
|
clk_put(slim_rproc->clks[i]);
|
||
|
|
err:
|
||
|
|
rproc_free(rproc);
|
||
|
|
return ERR_PTR(err);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(st_slim_rproc_alloc);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* st_slim_rproc_put() - put slim rproc resources
|
||
|
|
* @slim_rproc: Pointer to the st_slim_rproc struct
|
||
|
|
*
|
||
|
|
* Function for calling respective _put() functions on slim_rproc resources.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
void st_slim_rproc_put(struct st_slim_rproc *slim_rproc)
|
||
|
|
{
|
||
|
|
int clk;
|
||
|
|
|
||
|
|
if (!slim_rproc)
|
||
|
|
return;
|
||
|
|
|
||
|
|
slim_clk_disable(slim_rproc);
|
||
|
|
|
||
|
|
for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
|
||
|
|
clk_put(slim_rproc->clks[clk]);
|
||
|
|
|
||
|
|
rproc_del(slim_rproc->rproc);
|
||
|
|
rproc_free(slim_rproc->rproc);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(st_slim_rproc_put);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Peter Griffin <peter.griffin@linaro.org>");
|
||
|
|
MODULE_DESCRIPTION("STMicroelectronics SLIM core rproc driver");
|
||
|
|
MODULE_LICENSE("GPL v2");
|