Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 460 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/remoteproc/ti_k3_dsp_rproc.c b/roms/u-boot/drivers/remoteproc/ti_k3_dsp_rproc.c
new file mode 100644
index 000000000..1a2e9dd1f
--- /dev/null
+++ b/roms/u-boot/drivers/remoteproc/ti_k3_dsp_rproc.c
@@ -0,0 +1,460 @@
+// 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	= sizeof(struct k3_dsp_privdata),
+};