1 // SPDX-License-Identifier: GPL-2.0+
3 * Texas Instruments' K3 DSP Remoteproc driver
5 * Copyright (C) 2018-2019 Texas Instruments Incorporated - http://www.ti.com/
6 * Lokesh Vutla <lokeshvutla@ti.com>
13 #include <remoteproc.h>
18 #include <power-domain.h>
19 #include <dm/device_compat.h>
20 #include <linux/err.h>
21 #include <linux/soc/ti/ti_sci_protocol.h>
22 #include "ti_sci_proc.h"
24 #define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK (SZ_16M - 1)
27 * struct k3_dsp_mem - internal memory structure
28 * @cpu_addr: MPU virtual address of the memory region
29 * @bus_addr: Bus address used to access the memory region
30 * @dev_addr: Device address from remoteproc view
31 * @size: Size of the memory region
34 void __iomem *cpu_addr;
41 * struct k3_dsp_privdata - Structure representing Remote processor data.
42 * @rproc_rst: rproc reset control data
43 * @tsp: Pointer to TISCI proc contrl handle
44 * @mem: Array of available memories
45 * @num_mem: Number of available memories
47 struct k3_dsp_privdata {
48 struct reset_ctl dsp_rst;
49 struct ti_sci_proc tsp;
50 struct k3_dsp_mem *mem;
55 * k3_dsp_load() - Load up the Remote processor image
56 * @dev: rproc device pointer
57 * @addr: Address at which image is available
58 * @size: size of the image
60 * Return: 0 if all goes good, else appropriate error message.
62 static int k3_dsp_load(struct udevice *dev, ulong addr, ulong size)
64 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
68 dev_dbg(dev, "%s addr = 0x%lx, size = 0x%lx\n", __func__, addr, size);
69 ret = ti_sci_proc_request(&dsp->tsp);
73 ret = rproc_elf_load_image(dev, addr, size);
75 dev_err(dev, "Loading elf failed %d\n", ret);
79 boot_vector = rproc_elf_get_boot_addr(dev, addr);
81 dev_dbg(dev, "%s: Boot vector = 0x%x\n", __func__, boot_vector);
83 ret = ti_sci_proc_set_config(&dsp->tsp, boot_vector, 0, 0);
85 ti_sci_proc_release(&dsp->tsp);
90 * k3_dsp_start() - Start the remote processor
91 * @dev: rproc device pointer
93 * Return: 0 if all went ok, else return appropriate error
95 static int k3_dsp_start(struct udevice *dev)
97 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
100 dev_dbg(dev, "%s\n", __func__);
102 ret = ti_sci_proc_request(&dsp->tsp);
106 * Setting the right clock frequency would have taken care by
107 * assigned-clock-rates during the device probe. So no need to
108 * set the frequency again here.
110 ret = ti_sci_proc_power_domain_on(&dsp->tsp);
114 ret = reset_deassert(&dsp->dsp_rst);
117 ti_sci_proc_release(&dsp->tsp);
122 static int k3_dsp_stop(struct udevice *dev)
124 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
126 dev_dbg(dev, "%s\n", __func__);
128 ti_sci_proc_request(&dsp->tsp);
129 reset_assert(&dsp->dsp_rst);
130 ti_sci_proc_power_domain_off(&dsp->tsp);
131 ti_sci_proc_release(&dsp->tsp);
137 * k3_dsp_init() - Initialize the remote processor
138 * @dev: rproc device pointer
140 * Return: 0 if all went ok, else return appropriate error
142 static int k3_dsp_init(struct udevice *dev)
144 dev_dbg(dev, "%s\n", __func__);
149 static int k3_dsp_reset(struct udevice *dev)
151 dev_dbg(dev, "%s\n", __func__);
156 static void *k3_dsp_da_to_va(struct udevice *dev, ulong da, ulong len)
158 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
159 phys_addr_t bus_addr, dev_addr;
160 void __iomem *va = NULL;
165 dev_dbg(dev, "%s\n", __func__);
170 for (i = 0; i < dsp->num_mems; i++) {
171 bus_addr = dsp->mem[i].bus_addr;
172 dev_addr = dsp->mem[i].dev_addr;
173 size = dsp->mem[i].size;
175 if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
176 offset = da - dev_addr;
177 va = dsp->mem[i].cpu_addr + offset;
178 return (__force void *)va;
181 if (da >= bus_addr && (da + len) <= (bus_addr + size)) {
182 offset = da - bus_addr;
183 va = dsp->mem[i].cpu_addr + offset;
184 return (__force void *)va;
188 /* Assume it is DDR region and return da */
189 return map_physmem(da, len, MAP_NOCACHE);
192 static const struct dm_rproc_ops k3_dsp_ops = {
195 .start = k3_dsp_start,
197 .reset = k3_dsp_reset,
198 .device_to_virt = k3_dsp_da_to_va,
201 static int ti_sci_proc_of_to_priv(struct udevice *dev, struct ti_sci_proc *tsp)
206 dev_dbg(dev, "%s\n", __func__);
208 tsp->sci = ti_sci_get_by_phandle(dev, "ti,sci");
209 if (IS_ERR(tsp->sci)) {
210 dev_err(dev, "ti_sci get failed: %ld\n", PTR_ERR(tsp->sci));
211 return PTR_ERR(tsp->sci);
214 ret = dev_read_u32_array(dev, "ti,sci-proc-ids", ids, 2);
216 dev_err(dev, "Proc IDs not populated %d\n", ret);
220 tsp->ops = &tsp->sci->ops.proc_ops;
221 tsp->proc_id = ids[0];
222 tsp->host_id = ids[1];
223 tsp->dev_id = dev_read_u32_default(dev, "ti,sci-dev-id",
224 TI_SCI_RESOURCE_NULL);
225 if (tsp->dev_id == TI_SCI_RESOURCE_NULL) {
226 dev_err(dev, "Device ID not populated %d\n", ret);
233 static int k3_dsp_of_get_memories(struct udevice *dev)
235 static const char * const mem_names[] = {"l2sram", "l1pram", "l1dram"};
236 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
239 dev_dbg(dev, "%s\n", __func__);
241 dsp->num_mems = ARRAY_SIZE(mem_names);
242 dsp->mem = calloc(dsp->num_mems, sizeof(*dsp->mem));
246 for (i = 0; i < dsp->num_mems; i++) {
247 /* C71 cores only have a L1P Cache, there are no L1P SRAMs */
248 if (device_is_compatible(dev, "ti,j721e-c71-dsp") &&
249 !strcmp(mem_names[i], "l1pram")) {
250 dsp->mem[i].bus_addr = FDT_ADDR_T_NONE;
251 dsp->mem[i].dev_addr = FDT_ADDR_T_NONE;
252 dsp->mem[i].cpu_addr = NULL;
253 dsp->mem[i].size = 0;
257 dsp->mem[i].bus_addr = dev_read_addr_size_name(dev, mem_names[i],
258 (fdt_addr_t *)&dsp->mem[i].size);
259 if (dsp->mem[i].bus_addr == FDT_ADDR_T_NONE) {
260 dev_err(dev, "%s bus address not found\n", mem_names[i]);
263 dsp->mem[i].cpu_addr = map_physmem(dsp->mem[i].bus_addr,
266 dsp->mem[i].dev_addr = dsp->mem[i].bus_addr &
267 KEYSTONE_RPROC_LOCAL_ADDRESS_MASK;
269 dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %p da %pa\n",
270 mem_names[i], &dsp->mem[i].bus_addr,
271 dsp->mem[i].size, dsp->mem[i].cpu_addr,
272 &dsp->mem[i].dev_addr);
279 * k3_of_to_priv() - generate private data from device tree
280 * @dev: corresponding k3 dsp processor device
281 * @dsp: pointer to driver specific private data
283 * Return: 0 if all goes good, else appropriate error message.
285 static int k3_dsp_of_to_priv(struct udevice *dev, struct k3_dsp_privdata *dsp)
289 dev_dbg(dev, "%s\n", __func__);
291 ret = reset_get_by_index(dev, 0, &dsp->dsp_rst);
293 dev_err(dev, "reset_get() failed: %d\n", ret);
297 ret = ti_sci_proc_of_to_priv(dev, &dsp->tsp);
301 ret = k3_dsp_of_get_memories(dev);
309 * k3_dsp_probe() - Basic probe
310 * @dev: corresponding k3 remote processor device
312 * Return: 0 if all goes good, else appropriate error message.
314 static int k3_dsp_probe(struct udevice *dev)
316 struct k3_dsp_privdata *dsp;
319 dev_dbg(dev, "%s\n", __func__);
321 dsp = dev_get_priv(dev);
323 ret = k3_dsp_of_to_priv(dev, dsp);
325 dev_dbg(dev, "%s: Probe failed with error %d\n", __func__, ret);
329 dev_dbg(dev, "Remoteproc successfully probed\n");
334 static int k3_dsp_remove(struct udevice *dev)
336 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
343 static const struct udevice_id k3_dsp_ids[] = {
344 { .compatible = "ti,j721e-c66-dsp"},
345 { .compatible = "ti,j721e-c71-dsp"},
349 U_BOOT_DRIVER(k3_dsp) = {
351 .of_match = k3_dsp_ids,
352 .id = UCLASS_REMOTEPROC,
354 .probe = k3_dsp_probe,
355 .remove = k3_dsp_remove,
356 .priv_auto_alloc_size = sizeof(struct k3_dsp_privdata),