--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Texas Instruments' K3 DSP Remoteproc driver
+ *
+ * Copyright (C) 2018-2019 Texas Instruments Incorporated - http://www.ti.com/
+ * Lokesh Vutla <lokeshvutla@ti.com>
+ *
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <remoteproc.h>
+#include <errno.h>
+#include <clk.h>
+#include <reset.h>
+#include <asm/io.h>
+#include <power-domain.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_privdata - Structure representing Remote processor data.
+ * @rproc_rst: rproc reset control data
+ * @tsp: Pointer to TISCI proc contrl handle
+ * @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_mem *mem;
+ int num_mems;
+};
+
+/**
+ * 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);
+ 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 = rproc_elf_load_image(dev, addr, size);
+ if (ret < 0) {
+ dev_err(dev, "Loading elf failed %d\n", ret);
+ goto proc_release;
+ }
+
+ boot_vector = rproc_elf_get_boot_addr(dev, addr);
+
+ dev_dbg(dev, "%s: Boot vector = 0x%x\n", __func__, boot_vector);
+
+ ret = ti_sci_proc_set_config(&dsp->tsp, boot_vector, 0, 0);
+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);
+ int ret;
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ ret = ti_sci_proc_request(&dsp->tsp);
+ if (ret)
+ return ret;
+ /*
+ * Setting the right clock frequency would have taken care by
+ * assigned-clock-rates during the device probe. So no need to
+ * set the frequency again here.
+ */
+ ret = ti_sci_proc_power_domain_on(&dsp->tsp);
+ if (ret)
+ goto proc_release;
+
+ ret = reset_deassert(&dsp->dsp_rst);
+
+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;
+
+ 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;
+ }
+
+ 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 udevice_id k3_dsp_ids[] = {
+ { .compatible = "ti,j721e-c66-dsp"},
+ { .compatible = "ti,j721e-c71-dsp"},
+ {}
+};
+
+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),
+};
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