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>
12 #include <remoteproc.h>
17 #include <power-domain.h>
18 #include <linux/soc/ti/ti_sci_protocol.h>
19 #include "ti_sci_proc.h"
21 #define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK (SZ_16M - 1)
24 * struct k3_dsp_mem - internal memory structure
25 * @cpu_addr: MPU virtual address of the memory region
26 * @bus_addr: Bus address used to access the memory region
27 * @dev_addr: Device address from remoteproc view
28 * @size: Size of the memory region
31 void __iomem *cpu_addr;
38 * struct k3_dsp_privdata - Structure representing Remote processor data.
39 * @rproc_rst: rproc reset control data
40 * @tsp: Pointer to TISCI proc contrl handle
41 * @mem: Array of available memories
42 * @num_mem: Number of available memories
44 struct k3_dsp_privdata {
45 struct reset_ctl dsp_rst;
46 struct ti_sci_proc tsp;
47 struct k3_dsp_mem *mem;
52 * k3_dsp_load() - Load up the Remote processor image
53 * @dev: rproc device pointer
54 * @addr: Address at which image is available
55 * @size: size of the image
57 * Return: 0 if all goes good, else appropriate error message.
59 static int k3_dsp_load(struct udevice *dev, ulong addr, ulong size)
61 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
65 dev_dbg(dev, "%s addr = 0x%lx, size = 0x%lx\n", __func__, addr, size);
66 ret = ti_sci_proc_request(&dsp->tsp);
70 ret = rproc_elf_load_image(dev, addr, size);
72 dev_err(dev, "Loading elf failed %d\n", ret);
76 boot_vector = rproc_elf_get_boot_addr(dev, addr);
78 dev_dbg(dev, "%s: Boot vector = 0x%x\n", __func__, boot_vector);
80 ret = ti_sci_proc_set_config(&dsp->tsp, boot_vector, 0, 0);
82 ti_sci_proc_release(&dsp->tsp);
87 * k3_dsp_start() - Start the remote processor
88 * @dev: rproc device pointer
90 * Return: 0 if all went ok, else return appropriate error
92 static int k3_dsp_start(struct udevice *dev)
94 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
97 dev_dbg(dev, "%s\n", __func__);
99 ret = ti_sci_proc_request(&dsp->tsp);
103 * Setting the right clock frequency would have taken care by
104 * assigned-clock-rates during the device probe. So no need to
105 * set the frequency again here.
107 ret = ti_sci_proc_power_domain_on(&dsp->tsp);
111 ret = reset_deassert(&dsp->dsp_rst);
114 ti_sci_proc_release(&dsp->tsp);
119 static int k3_dsp_stop(struct udevice *dev)
121 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
123 dev_dbg(dev, "%s\n", __func__);
125 ti_sci_proc_request(&dsp->tsp);
126 reset_assert(&dsp->dsp_rst);
127 ti_sci_proc_power_domain_off(&dsp->tsp);
128 ti_sci_proc_release(&dsp->tsp);
134 * k3_dsp_init() - Initialize the remote processor
135 * @dev: rproc device pointer
137 * Return: 0 if all went ok, else return appropriate error
139 static int k3_dsp_init(struct udevice *dev)
141 dev_dbg(dev, "%s\n", __func__);
146 static int k3_dsp_reset(struct udevice *dev)
148 dev_dbg(dev, "%s\n", __func__);
153 static void *k3_dsp_da_to_va(struct udevice *dev, ulong da, ulong len)
155 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
156 phys_addr_t bus_addr, dev_addr;
157 void __iomem *va = NULL;
162 dev_dbg(dev, "%s\n", __func__);
167 for (i = 0; i < dsp->num_mems; i++) {
168 bus_addr = dsp->mem[i].bus_addr;
169 dev_addr = dsp->mem[i].dev_addr;
170 size = dsp->mem[i].size;
172 if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
173 offset = da - dev_addr;
174 va = dsp->mem[i].cpu_addr + offset;
175 return (__force void *)va;
178 if (da >= bus_addr && (da + len) <= (bus_addr + size)) {
179 offset = da - bus_addr;
180 va = dsp->mem[i].cpu_addr + offset;
181 return (__force void *)va;
185 /* Assume it is DDR region and return da */
186 return map_physmem(da, len, MAP_NOCACHE);
189 static const struct dm_rproc_ops k3_dsp_ops = {
192 .start = k3_dsp_start,
194 .reset = k3_dsp_reset,
195 .device_to_virt = k3_dsp_da_to_va,
198 static int ti_sci_proc_of_to_priv(struct udevice *dev, struct ti_sci_proc *tsp)
203 dev_dbg(dev, "%s\n", __func__);
205 tsp->sci = ti_sci_get_by_phandle(dev, "ti,sci");
206 if (IS_ERR(tsp->sci)) {
207 dev_err(dev, "ti_sci get failed: %ld\n", PTR_ERR(tsp->sci));
208 return PTR_ERR(tsp->sci);
211 ret = dev_read_u32_array(dev, "ti,sci-proc-ids", ids, 2);
213 dev_err(dev, "Proc IDs not populated %d\n", ret);
217 tsp->ops = &tsp->sci->ops.proc_ops;
218 tsp->proc_id = ids[0];
219 tsp->host_id = ids[1];
220 tsp->dev_id = dev_read_u32_default(dev, "ti,sci-dev-id",
221 TI_SCI_RESOURCE_NULL);
222 if (tsp->dev_id == TI_SCI_RESOURCE_NULL) {
223 dev_err(dev, "Device ID not populated %d\n", ret);
230 static int k3_dsp_of_get_memories(struct udevice *dev)
232 static const char * const mem_names[] = {"l2sram", "l1pram", "l1dram"};
233 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
236 dev_dbg(dev, "%s\n", __func__);
238 dsp->num_mems = ARRAY_SIZE(mem_names);
239 dsp->mem = calloc(dsp->num_mems, sizeof(*dsp->mem));
243 for (i = 0; i < dsp->num_mems; i++) {
244 /* C71 cores only have a L1P Cache, there are no L1P SRAMs */
245 if (device_is_compatible(dev, "ti,j721e-c71-dsp") &&
246 !strcmp(mem_names[i], "l1pram")) {
247 dsp->mem[i].bus_addr = FDT_ADDR_T_NONE;
248 dsp->mem[i].dev_addr = FDT_ADDR_T_NONE;
249 dsp->mem[i].cpu_addr = NULL;
250 dsp->mem[i].size = 0;
254 dsp->mem[i].bus_addr = dev_read_addr_size_name(dev, mem_names[i],
255 (fdt_addr_t *)&dsp->mem[i].size);
256 if (dsp->mem[i].bus_addr == FDT_ADDR_T_NONE) {
257 dev_err(dev, "%s bus address not found\n", mem_names[i]);
260 dsp->mem[i].cpu_addr = map_physmem(dsp->mem[i].bus_addr,
263 dsp->mem[i].dev_addr = dsp->mem[i].bus_addr &
264 KEYSTONE_RPROC_LOCAL_ADDRESS_MASK;
266 dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %p da %pa\n",
267 mem_names[i], &dsp->mem[i].bus_addr,
268 dsp->mem[i].size, dsp->mem[i].cpu_addr,
269 &dsp->mem[i].dev_addr);
276 * k3_of_to_priv() - generate private data from device tree
277 * @dev: corresponding k3 dsp processor device
278 * @dsp: pointer to driver specific private data
280 * Return: 0 if all goes good, else appropriate error message.
282 static int k3_dsp_of_to_priv(struct udevice *dev, struct k3_dsp_privdata *dsp)
286 dev_dbg(dev, "%s\n", __func__);
288 ret = reset_get_by_index(dev, 0, &dsp->dsp_rst);
290 dev_err(dev, "reset_get() failed: %d\n", ret);
294 ret = ti_sci_proc_of_to_priv(dev, &dsp->tsp);
298 ret = k3_dsp_of_get_memories(dev);
306 * k3_dsp_probe() - Basic probe
307 * @dev: corresponding k3 remote processor device
309 * Return: 0 if all goes good, else appropriate error message.
311 static int k3_dsp_probe(struct udevice *dev)
313 struct k3_dsp_privdata *dsp;
316 dev_dbg(dev, "%s\n", __func__);
318 dsp = dev_get_priv(dev);
320 ret = k3_dsp_of_to_priv(dev, dsp);
322 dev_dbg(dev, "%s: Probe failed with error %d\n", __func__, ret);
326 dev_dbg(dev, "Remoteproc successfully probed\n");
331 static int k3_dsp_remove(struct udevice *dev)
333 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
340 static const struct udevice_id k3_dsp_ids[] = {
341 { .compatible = "ti,j721e-c66-dsp"},
342 { .compatible = "ti,j721e-c71-dsp"},
346 U_BOOT_DRIVER(k3_dsp) = {
348 .of_match = k3_dsp_ids,
349 .id = UCLASS_REMOTEPROC,
351 .probe = k3_dsp_probe,
352 .remove = k3_dsp_remove,
353 .priv_auto_alloc_size = sizeof(struct k3_dsp_privdata),