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/err.h>
19 #include <linux/soc/ti/ti_sci_protocol.h>
20 #include "ti_sci_proc.h"
22 #define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK (SZ_16M - 1)
25 * struct k3_dsp_mem - internal memory structure
26 * @cpu_addr: MPU virtual address of the memory region
27 * @bus_addr: Bus address used to access the memory region
28 * @dev_addr: Device address from remoteproc view
29 * @size: Size of the memory region
32 void __iomem *cpu_addr;
39 * struct k3_dsp_privdata - Structure representing Remote processor data.
40 * @rproc_rst: rproc reset control data
41 * @tsp: Pointer to TISCI proc contrl handle
42 * @mem: Array of available memories
43 * @num_mem: Number of available memories
45 struct k3_dsp_privdata {
46 struct reset_ctl dsp_rst;
47 struct ti_sci_proc tsp;
48 struct k3_dsp_mem *mem;
53 * k3_dsp_load() - Load up the Remote processor image
54 * @dev: rproc device pointer
55 * @addr: Address at which image is available
56 * @size: size of the image
58 * Return: 0 if all goes good, else appropriate error message.
60 static int k3_dsp_load(struct udevice *dev, ulong addr, ulong size)
62 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
66 dev_dbg(dev, "%s addr = 0x%lx, size = 0x%lx\n", __func__, addr, size);
67 ret = ti_sci_proc_request(&dsp->tsp);
71 ret = rproc_elf_load_image(dev, addr, size);
73 dev_err(dev, "Loading elf failed %d\n", ret);
77 boot_vector = rproc_elf_get_boot_addr(dev, addr);
79 dev_dbg(dev, "%s: Boot vector = 0x%x\n", __func__, boot_vector);
81 ret = ti_sci_proc_set_config(&dsp->tsp, boot_vector, 0, 0);
83 ti_sci_proc_release(&dsp->tsp);
88 * k3_dsp_start() - Start the remote processor
89 * @dev: rproc device pointer
91 * Return: 0 if all went ok, else return appropriate error
93 static int k3_dsp_start(struct udevice *dev)
95 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
98 dev_dbg(dev, "%s\n", __func__);
100 ret = ti_sci_proc_request(&dsp->tsp);
104 * Setting the right clock frequency would have taken care by
105 * assigned-clock-rates during the device probe. So no need to
106 * set the frequency again here.
108 ret = ti_sci_proc_power_domain_on(&dsp->tsp);
112 ret = reset_deassert(&dsp->dsp_rst);
115 ti_sci_proc_release(&dsp->tsp);
120 static int k3_dsp_stop(struct udevice *dev)
122 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
124 dev_dbg(dev, "%s\n", __func__);
126 ti_sci_proc_request(&dsp->tsp);
127 reset_assert(&dsp->dsp_rst);
128 ti_sci_proc_power_domain_off(&dsp->tsp);
129 ti_sci_proc_release(&dsp->tsp);
135 * k3_dsp_init() - Initialize the remote processor
136 * @dev: rproc device pointer
138 * Return: 0 if all went ok, else return appropriate error
140 static int k3_dsp_init(struct udevice *dev)
142 dev_dbg(dev, "%s\n", __func__);
147 static int k3_dsp_reset(struct udevice *dev)
149 dev_dbg(dev, "%s\n", __func__);
154 static void *k3_dsp_da_to_va(struct udevice *dev, ulong da, ulong len)
156 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
157 phys_addr_t bus_addr, dev_addr;
158 void __iomem *va = NULL;
163 dev_dbg(dev, "%s\n", __func__);
168 for (i = 0; i < dsp->num_mems; i++) {
169 bus_addr = dsp->mem[i].bus_addr;
170 dev_addr = dsp->mem[i].dev_addr;
171 size = dsp->mem[i].size;
173 if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
174 offset = da - dev_addr;
175 va = dsp->mem[i].cpu_addr + offset;
176 return (__force void *)va;
179 if (da >= bus_addr && (da + len) <= (bus_addr + size)) {
180 offset = da - bus_addr;
181 va = dsp->mem[i].cpu_addr + offset;
182 return (__force void *)va;
186 /* Assume it is DDR region and return da */
187 return map_physmem(da, len, MAP_NOCACHE);
190 static const struct dm_rproc_ops k3_dsp_ops = {
193 .start = k3_dsp_start,
195 .reset = k3_dsp_reset,
196 .device_to_virt = k3_dsp_da_to_va,
199 static int ti_sci_proc_of_to_priv(struct udevice *dev, struct ti_sci_proc *tsp)
204 dev_dbg(dev, "%s\n", __func__);
206 tsp->sci = ti_sci_get_by_phandle(dev, "ti,sci");
207 if (IS_ERR(tsp->sci)) {
208 dev_err(dev, "ti_sci get failed: %ld\n", PTR_ERR(tsp->sci));
209 return PTR_ERR(tsp->sci);
212 ret = dev_read_u32_array(dev, "ti,sci-proc-ids", ids, 2);
214 dev_err(dev, "Proc IDs not populated %d\n", ret);
218 tsp->ops = &tsp->sci->ops.proc_ops;
219 tsp->proc_id = ids[0];
220 tsp->host_id = ids[1];
221 tsp->dev_id = dev_read_u32_default(dev, "ti,sci-dev-id",
222 TI_SCI_RESOURCE_NULL);
223 if (tsp->dev_id == TI_SCI_RESOURCE_NULL) {
224 dev_err(dev, "Device ID not populated %d\n", ret);
231 static int k3_dsp_of_get_memories(struct udevice *dev)
233 static const char * const mem_names[] = {"l2sram", "l1pram", "l1dram"};
234 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
237 dev_dbg(dev, "%s\n", __func__);
239 dsp->num_mems = ARRAY_SIZE(mem_names);
240 dsp->mem = calloc(dsp->num_mems, sizeof(*dsp->mem));
244 for (i = 0; i < dsp->num_mems; i++) {
245 /* C71 cores only have a L1P Cache, there are no L1P SRAMs */
246 if (device_is_compatible(dev, "ti,j721e-c71-dsp") &&
247 !strcmp(mem_names[i], "l1pram")) {
248 dsp->mem[i].bus_addr = FDT_ADDR_T_NONE;
249 dsp->mem[i].dev_addr = FDT_ADDR_T_NONE;
250 dsp->mem[i].cpu_addr = NULL;
251 dsp->mem[i].size = 0;
255 dsp->mem[i].bus_addr = dev_read_addr_size_name(dev, mem_names[i],
256 (fdt_addr_t *)&dsp->mem[i].size);
257 if (dsp->mem[i].bus_addr == FDT_ADDR_T_NONE) {
258 dev_err(dev, "%s bus address not found\n", mem_names[i]);
261 dsp->mem[i].cpu_addr = map_physmem(dsp->mem[i].bus_addr,
264 dsp->mem[i].dev_addr = dsp->mem[i].bus_addr &
265 KEYSTONE_RPROC_LOCAL_ADDRESS_MASK;
267 dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %p da %pa\n",
268 mem_names[i], &dsp->mem[i].bus_addr,
269 dsp->mem[i].size, dsp->mem[i].cpu_addr,
270 &dsp->mem[i].dev_addr);
277 * k3_of_to_priv() - generate private data from device tree
278 * @dev: corresponding k3 dsp processor device
279 * @dsp: pointer to driver specific private data
281 * Return: 0 if all goes good, else appropriate error message.
283 static int k3_dsp_of_to_priv(struct udevice *dev, struct k3_dsp_privdata *dsp)
287 dev_dbg(dev, "%s\n", __func__);
289 ret = reset_get_by_index(dev, 0, &dsp->dsp_rst);
291 dev_err(dev, "reset_get() failed: %d\n", ret);
295 ret = ti_sci_proc_of_to_priv(dev, &dsp->tsp);
299 ret = k3_dsp_of_get_memories(dev);
307 * k3_dsp_probe() - Basic probe
308 * @dev: corresponding k3 remote processor device
310 * Return: 0 if all goes good, else appropriate error message.
312 static int k3_dsp_probe(struct udevice *dev)
314 struct k3_dsp_privdata *dsp;
317 dev_dbg(dev, "%s\n", __func__);
319 dsp = dev_get_priv(dev);
321 ret = k3_dsp_of_to_priv(dev, dsp);
323 dev_dbg(dev, "%s: Probe failed with error %d\n", __func__, ret);
327 dev_dbg(dev, "Remoteproc successfully probed\n");
332 static int k3_dsp_remove(struct udevice *dev)
334 struct k3_dsp_privdata *dsp = dev_get_priv(dev);
341 static const struct udevice_id k3_dsp_ids[] = {
342 { .compatible = "ti,j721e-c66-dsp"},
343 { .compatible = "ti,j721e-c71-dsp"},
347 U_BOOT_DRIVER(k3_dsp) = {
349 .of_match = k3_dsp_ids,
350 .id = UCLASS_REMOTEPROC,
352 .probe = k3_dsp_probe,
353 .remove = k3_dsp_remove,
354 .priv_auto_alloc_size = sizeof(struct k3_dsp_privdata),