blob: 3361555c5367afafb8c6fb3389540b7360e30403 [file] [log] [blame]
// 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),
};