drivers/remoteproc/ti_k3_dsp_rproc.c - filogic/uboot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Texas Instruments' K3 DSP Remoteproc driver
  *
  * Copyright (C) 2018-2020 Texas Instruments Incorporated - https://www.ti.com/
  *	Lokesh Vutla <lokeshvutla@ti.com>
  *	Suman Anna <s-anna@ti.com>
  */

 #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
  * @in_use: flag to tell if the core is already in use.
  */
 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;
 	bool in_use;
 };

 /*
  * 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;

 	if (dsp->in_use) {
 		dev_err(dev,
 			"Invalid op: Trying to load/start on already running core %d\n",
 			dsp->tsp.proc_id);
 		return -EINVAL;
 	}

 	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);
 	}

 	dsp->in_use = true;
 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__);

 	dsp->in_use = false;
 	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")) ||
 		    (device_is_compatible(dev, "ti,j721s2-c71-dsp")) ||
 		    (device_is_compatible(dev, "ti,am62a-c7xv-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;
 		}
 		if (device_is_compatible(dev, "ti,am62a-c7xv-dsp") &&
 		    !strcmp(mem_names[i], "l1dram")) {
 			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, },
 	{ .compatible = "ti,j721s2-c71-dsp", .data = (ulong)&c71_data, },
 	{ .compatible = "ti,am62a-c7xv-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	= sizeof(struct k3_dsp_privdata),
 };
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Texas Instruments' K3 DSP Remoteproc driver
	*
	* Copyright (C) 2018-2020 Texas Instruments Incorporated - https://www.ti.com/
	* Lokesh Vutla <lokeshvutla@ti.com>
	* Suman Anna <s-anna@ti.com>
	*/

	#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
	* @in_use: flag to tell if the core is already in use.
	*/
	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;
	bool in_use;
	};

	/*
	* 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;

	if (dsp->in_use) {
	dev_err(dev,
	"Invalid op: Trying to load/start on already running core %d\n",
	dsp->tsp.proc_id);
	return -EINVAL;
	}

	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);
	}

	dsp->in_use = true;
	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__);

	dsp->in_use = false;
	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")) \|\|
	(device_is_compatible(dev, "ti,j721s2-c71-dsp")) \|\|
	(device_is_compatible(dev, "ti,am62a-c7xv-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;
	}
	if (device_is_compatible(dev, "ti,am62a-c7xv-dsp") &&
	!strcmp(mem_names[i], "l1dram")) {
	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, },
	{ .compatible = "ti,j721s2-c71-dsp", .data = (ulong)&c71_data, },
	{ .compatible = "ti,am62a-c7xv-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 = sizeof(struct k3_dsp_privdata),
	};