mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-25 03:18:51 +09:00
461 lines
11 KiB
C
461 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Texas Instruments' K3 DSP Remoteproc driver
|
|
*
|
|
* Copyright (C) 2018-2020 Texas Instruments Incorporated - http://www.ti.com/
|
|
* Lokesh Vutla <lokeshvutla@ti.com>
|
|
* Suman Anna <s-anna@ti.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <log.h>
|
|
#include <malloc.h>
|
|
#include <remoteproc.h>
|
|
#include <errno.h>
|
|
#include <clk.h>
|
|
#include <reset.h>
|
|
#include <asm/io.h>
|
|
#include <power-domain.h>
|
|
#include <dm/device_compat.h>
|
|
#include <linux/err.h>
|
|
#include <linux/sizes.h>
|
|
#include <linux/soc/ti/ti_sci_protocol.h>
|
|
#include "ti_sci_proc.h"
|
|
|
|
#define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK (SZ_16M - 1)
|
|
|
|
/**
|
|
* struct k3_dsp_mem - internal memory structure
|
|
* @cpu_addr: MPU virtual address of the memory region
|
|
* @bus_addr: Bus address used to access the memory region
|
|
* @dev_addr: Device address from remoteproc view
|
|
* @size: Size of the memory region
|
|
*/
|
|
struct k3_dsp_mem {
|
|
void __iomem *cpu_addr;
|
|
phys_addr_t bus_addr;
|
|
phys_addr_t dev_addr;
|
|
size_t size;
|
|
};
|
|
|
|
/**
|
|
* struct k3_dsp_boot_data - internal data structure used for boot
|
|
* @boot_align_addr: Boot vector address alignment granularity
|
|
* @uses_lreset: Flag to denote the need for local reset management
|
|
*/
|
|
struct k3_dsp_boot_data {
|
|
u32 boot_align_addr;
|
|
bool uses_lreset;
|
|
};
|
|
|
|
/**
|
|
* struct k3_dsp_privdata - Structure representing Remote processor data.
|
|
* @rproc_rst: rproc reset control data
|
|
* @tsp: Pointer to TISCI proc contrl handle
|
|
* @data: Pointer to DSP specific boot data structure
|
|
* @mem: Array of available memories
|
|
* @num_mem: Number of available memories
|
|
*/
|
|
struct k3_dsp_privdata {
|
|
struct reset_ctl dsp_rst;
|
|
struct ti_sci_proc tsp;
|
|
struct k3_dsp_boot_data *data;
|
|
struct k3_dsp_mem *mem;
|
|
int num_mems;
|
|
};
|
|
|
|
/*
|
|
* The C66x DSP cores have a local reset that affects only the CPU, and a
|
|
* generic module reset that powers on the device and allows the DSP internal
|
|
* memories to be accessed while the local reset is asserted. This function is
|
|
* used to release the global reset on C66x DSPs to allow loading into the DSP
|
|
* internal RAMs. This helper function is invoked in k3_dsp_load() before any
|
|
* actual firmware loading and is undone only in k3_dsp_stop(). The local reset
|
|
* on C71x cores is a no-op and the global reset cannot be released on C71x
|
|
* cores until after the firmware images are loaded, so this function does
|
|
* nothing for C71x cores.
|
|
*/
|
|
static int k3_dsp_prepare(struct udevice *dev)
|
|
{
|
|
struct k3_dsp_privdata *dsp = dev_get_priv(dev);
|
|
struct k3_dsp_boot_data *data = dsp->data;
|
|
int ret;
|
|
|
|
/* local reset is no-op on C71x processors */
|
|
if (!data->uses_lreset)
|
|
return 0;
|
|
|
|
ret = ti_sci_proc_power_domain_on(&dsp->tsp);
|
|
if (ret)
|
|
dev_err(dev, "cannot enable internal RAM loading, ret = %d\n",
|
|
ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* This function is the counterpart to k3_dsp_prepare() and is used to assert
|
|
* the global reset on C66x DSP cores (no-op for C71x DSP cores). This completes
|
|
* the second step of powering down the C66x DSP cores. The cores themselves
|
|
* are halted through the local reset in first step. This function is invoked
|
|
* in k3_dsp_stop() after the local reset is asserted.
|
|
*/
|
|
static int k3_dsp_unprepare(struct udevice *dev)
|
|
{
|
|
struct k3_dsp_privdata *dsp = dev_get_priv(dev);
|
|
struct k3_dsp_boot_data *data = dsp->data;
|
|
|
|
/* local reset is no-op on C71x processors */
|
|
if (!data->uses_lreset)
|
|
return 0;
|
|
|
|
return ti_sci_proc_power_domain_off(&dsp->tsp);
|
|
}
|
|
|
|
/**
|
|
* k3_dsp_load() - Load up the Remote processor image
|
|
* @dev: rproc device pointer
|
|
* @addr: Address at which image is available
|
|
* @size: size of the image
|
|
*
|
|
* Return: 0 if all goes good, else appropriate error message.
|
|
*/
|
|
static int k3_dsp_load(struct udevice *dev, ulong addr, ulong size)
|
|
{
|
|
struct k3_dsp_privdata *dsp = dev_get_priv(dev);
|
|
struct k3_dsp_boot_data *data = dsp->data;
|
|
u32 boot_vector;
|
|
int ret;
|
|
|
|
dev_dbg(dev, "%s addr = 0x%lx, size = 0x%lx\n", __func__, addr, size);
|
|
ret = ti_sci_proc_request(&dsp->tsp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = k3_dsp_prepare(dev);
|
|
if (ret) {
|
|
dev_err(dev, "DSP prepare failed for core %d\n",
|
|
dsp->tsp.proc_id);
|
|
goto proc_release;
|
|
}
|
|
|
|
ret = rproc_elf_load_image(dev, addr, size);
|
|
if (ret < 0) {
|
|
dev_err(dev, "Loading elf failed %d\n", ret);
|
|
goto unprepare;
|
|
}
|
|
|
|
boot_vector = rproc_elf_get_boot_addr(dev, addr);
|
|
if (boot_vector & (data->boot_align_addr - 1)) {
|
|
ret = -EINVAL;
|
|
dev_err(dev, "Boot vector 0x%x not aligned on 0x%x boundary\n",
|
|
boot_vector, data->boot_align_addr);
|
|
goto proc_release;
|
|
}
|
|
|
|
dev_dbg(dev, "%s: Boot vector = 0x%x\n", __func__, boot_vector);
|
|
|
|
ret = ti_sci_proc_set_config(&dsp->tsp, boot_vector, 0, 0);
|
|
unprepare:
|
|
if (ret)
|
|
k3_dsp_unprepare(dev);
|
|
proc_release:
|
|
ti_sci_proc_release(&dsp->tsp);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* k3_dsp_start() - Start the remote processor
|
|
* @dev: rproc device pointer
|
|
*
|
|
* Return: 0 if all went ok, else return appropriate error
|
|
*/
|
|
static int k3_dsp_start(struct udevice *dev)
|
|
{
|
|
struct k3_dsp_privdata *dsp = dev_get_priv(dev);
|
|
struct k3_dsp_boot_data *data = dsp->data;
|
|
int ret;
|
|
|
|
dev_dbg(dev, "%s\n", __func__);
|
|
|
|
ret = ti_sci_proc_request(&dsp->tsp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (!data->uses_lreset) {
|
|
ret = ti_sci_proc_power_domain_on(&dsp->tsp);
|
|
if (ret)
|
|
goto proc_release;
|
|
}
|
|
|
|
ret = reset_deassert(&dsp->dsp_rst);
|
|
if (ret) {
|
|
if (!data->uses_lreset)
|
|
ti_sci_proc_power_domain_off(&dsp->tsp);
|
|
}
|
|
|
|
proc_release:
|
|
ti_sci_proc_release(&dsp->tsp);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int k3_dsp_stop(struct udevice *dev)
|
|
{
|
|
struct k3_dsp_privdata *dsp = dev_get_priv(dev);
|
|
|
|
dev_dbg(dev, "%s\n", __func__);
|
|
|
|
ti_sci_proc_request(&dsp->tsp);
|
|
reset_assert(&dsp->dsp_rst);
|
|
ti_sci_proc_power_domain_off(&dsp->tsp);
|
|
ti_sci_proc_release(&dsp->tsp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* k3_dsp_init() - Initialize the remote processor
|
|
* @dev: rproc device pointer
|
|
*
|
|
* Return: 0 if all went ok, else return appropriate error
|
|
*/
|
|
static int k3_dsp_init(struct udevice *dev)
|
|
{
|
|
dev_dbg(dev, "%s\n", __func__);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int k3_dsp_reset(struct udevice *dev)
|
|
{
|
|
dev_dbg(dev, "%s\n", __func__);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void *k3_dsp_da_to_va(struct udevice *dev, ulong da, ulong len)
|
|
{
|
|
struct k3_dsp_privdata *dsp = dev_get_priv(dev);
|
|
phys_addr_t bus_addr, dev_addr;
|
|
void __iomem *va = NULL;
|
|
size_t size;
|
|
u32 offset;
|
|
int i;
|
|
|
|
dev_dbg(dev, "%s\n", __func__);
|
|
|
|
if (len <= 0)
|
|
return NULL;
|
|
|
|
for (i = 0; i < dsp->num_mems; i++) {
|
|
bus_addr = dsp->mem[i].bus_addr;
|
|
dev_addr = dsp->mem[i].dev_addr;
|
|
size = dsp->mem[i].size;
|
|
|
|
if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
|
|
offset = da - dev_addr;
|
|
va = dsp->mem[i].cpu_addr + offset;
|
|
return (__force void *)va;
|
|
}
|
|
|
|
if (da >= bus_addr && (da + len) <= (bus_addr + size)) {
|
|
offset = da - bus_addr;
|
|
va = dsp->mem[i].cpu_addr + offset;
|
|
return (__force void *)va;
|
|
}
|
|
}
|
|
|
|
/* Assume it is DDR region and return da */
|
|
return map_physmem(da, len, MAP_NOCACHE);
|
|
}
|
|
|
|
static const struct dm_rproc_ops k3_dsp_ops = {
|
|
.init = k3_dsp_init,
|
|
.load = k3_dsp_load,
|
|
.start = k3_dsp_start,
|
|
.stop = k3_dsp_stop,
|
|
.reset = k3_dsp_reset,
|
|
.device_to_virt = k3_dsp_da_to_va,
|
|
};
|
|
|
|
static int ti_sci_proc_of_to_priv(struct udevice *dev, struct ti_sci_proc *tsp)
|
|
{
|
|
u32 ids[2];
|
|
int ret;
|
|
|
|
dev_dbg(dev, "%s\n", __func__);
|
|
|
|
tsp->sci = ti_sci_get_by_phandle(dev, "ti,sci");
|
|
if (IS_ERR(tsp->sci)) {
|
|
dev_err(dev, "ti_sci get failed: %ld\n", PTR_ERR(tsp->sci));
|
|
return PTR_ERR(tsp->sci);
|
|
}
|
|
|
|
ret = dev_read_u32_array(dev, "ti,sci-proc-ids", ids, 2);
|
|
if (ret) {
|
|
dev_err(dev, "Proc IDs not populated %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
tsp->ops = &tsp->sci->ops.proc_ops;
|
|
tsp->proc_id = ids[0];
|
|
tsp->host_id = ids[1];
|
|
tsp->dev_id = dev_read_u32_default(dev, "ti,sci-dev-id",
|
|
TI_SCI_RESOURCE_NULL);
|
|
if (tsp->dev_id == TI_SCI_RESOURCE_NULL) {
|
|
dev_err(dev, "Device ID not populated %d\n", ret);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int k3_dsp_of_get_memories(struct udevice *dev)
|
|
{
|
|
static const char * const mem_names[] = {"l2sram", "l1pram", "l1dram"};
|
|
struct k3_dsp_privdata *dsp = dev_get_priv(dev);
|
|
int i;
|
|
|
|
dev_dbg(dev, "%s\n", __func__);
|
|
|
|
dsp->num_mems = ARRAY_SIZE(mem_names);
|
|
dsp->mem = calloc(dsp->num_mems, sizeof(*dsp->mem));
|
|
if (!dsp->mem)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < dsp->num_mems; i++) {
|
|
/* C71 cores only have a L1P Cache, there are no L1P SRAMs */
|
|
if (device_is_compatible(dev, "ti,j721e-c71-dsp") &&
|
|
!strcmp(mem_names[i], "l1pram")) {
|
|
dsp->mem[i].bus_addr = FDT_ADDR_T_NONE;
|
|
dsp->mem[i].dev_addr = FDT_ADDR_T_NONE;
|
|
dsp->mem[i].cpu_addr = NULL;
|
|
dsp->mem[i].size = 0;
|
|
continue;
|
|
}
|
|
|
|
dsp->mem[i].bus_addr = dev_read_addr_size_name(dev, mem_names[i],
|
|
(fdt_addr_t *)&dsp->mem[i].size);
|
|
if (dsp->mem[i].bus_addr == FDT_ADDR_T_NONE) {
|
|
dev_err(dev, "%s bus address not found\n", mem_names[i]);
|
|
return -EINVAL;
|
|
}
|
|
dsp->mem[i].cpu_addr = map_physmem(dsp->mem[i].bus_addr,
|
|
dsp->mem[i].size,
|
|
MAP_NOCACHE);
|
|
dsp->mem[i].dev_addr = dsp->mem[i].bus_addr &
|
|
KEYSTONE_RPROC_LOCAL_ADDRESS_MASK;
|
|
|
|
dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %p da %pa\n",
|
|
mem_names[i], &dsp->mem[i].bus_addr,
|
|
dsp->mem[i].size, dsp->mem[i].cpu_addr,
|
|
&dsp->mem[i].dev_addr);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* k3_of_to_priv() - generate private data from device tree
|
|
* @dev: corresponding k3 dsp processor device
|
|
* @dsp: pointer to driver specific private data
|
|
*
|
|
* Return: 0 if all goes good, else appropriate error message.
|
|
*/
|
|
static int k3_dsp_of_to_priv(struct udevice *dev, struct k3_dsp_privdata *dsp)
|
|
{
|
|
int ret;
|
|
|
|
dev_dbg(dev, "%s\n", __func__);
|
|
|
|
ret = reset_get_by_index(dev, 0, &dsp->dsp_rst);
|
|
if (ret) {
|
|
dev_err(dev, "reset_get() failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = ti_sci_proc_of_to_priv(dev, &dsp->tsp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = k3_dsp_of_get_memories(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
dsp->data = (struct k3_dsp_boot_data *)dev_get_driver_data(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* k3_dsp_probe() - Basic probe
|
|
* @dev: corresponding k3 remote processor device
|
|
*
|
|
* Return: 0 if all goes good, else appropriate error message.
|
|
*/
|
|
static int k3_dsp_probe(struct udevice *dev)
|
|
{
|
|
struct k3_dsp_privdata *dsp;
|
|
int ret;
|
|
|
|
dev_dbg(dev, "%s\n", __func__);
|
|
|
|
dsp = dev_get_priv(dev);
|
|
|
|
ret = k3_dsp_of_to_priv(dev, dsp);
|
|
if (ret) {
|
|
dev_dbg(dev, "%s: Probe failed with error %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* The DSP local resets are deasserted by default on Power-On-Reset.
|
|
* Assert the local resets to ensure the DSPs don't execute bogus code
|
|
* in .load() callback when the module reset is released to support
|
|
* internal memory loading. This is needed for C66x DSPs, and is a
|
|
* no-op on C71x DSPs.
|
|
*/
|
|
reset_assert(&dsp->dsp_rst);
|
|
|
|
dev_dbg(dev, "Remoteproc successfully probed\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int k3_dsp_remove(struct udevice *dev)
|
|
{
|
|
struct k3_dsp_privdata *dsp = dev_get_priv(dev);
|
|
|
|
free(dsp->mem);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct k3_dsp_boot_data c66_data = {
|
|
.boot_align_addr = SZ_1K,
|
|
.uses_lreset = true,
|
|
};
|
|
|
|
static const struct k3_dsp_boot_data c71_data = {
|
|
.boot_align_addr = SZ_2M,
|
|
.uses_lreset = false,
|
|
};
|
|
|
|
static const struct udevice_id k3_dsp_ids[] = {
|
|
{ .compatible = "ti,j721e-c66-dsp", .data = (ulong)&c66_data, },
|
|
{ .compatible = "ti,j721e-c71-dsp", .data = (ulong)&c71_data, },
|
|
{}
|
|
};
|
|
|
|
U_BOOT_DRIVER(k3_dsp) = {
|
|
.name = "k3_dsp",
|
|
.of_match = k3_dsp_ids,
|
|
.id = UCLASS_REMOTEPROC,
|
|
.ops = &k3_dsp_ops,
|
|
.probe = k3_dsp_probe,
|
|
.remove = k3_dsp_remove,
|
|
.priv_auto_alloc_size = sizeof(struct k3_dsp_privdata),
|
|
};
|