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14#include <linux/clk.h>
15#include <linux/err.h>
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/of.h>
19#include <linux/of_device.h>
20#include <linux/platform_device.h>
21#include <linux/remoteproc.h>
22#include <linux/remoteproc/st_slim_rproc.h>
23#include "remoteproc_internal.h"
24
25
26#define SLIM_ID_OFST 0x0
27#define SLIM_VER_OFST 0x4
28
29#define SLIM_EN_OFST 0x8
30#define SLIM_EN_RUN BIT(0)
31
32#define SLIM_CLK_GATE_OFST 0xC
33#define SLIM_CLK_GATE_DIS BIT(0)
34#define SLIM_CLK_GATE_RESET BIT(2)
35
36#define SLIM_SLIM_PC_OFST 0x20
37
38
39#define SLIM_REV_ID_OFST 0x0
40#define SLIM_REV_ID_MIN_MASK GENMASK(15, 8)
41#define SLIM_REV_ID_MIN(id) ((id & SLIM_REV_ID_MIN_MASK) >> 8)
42#define SLIM_REV_ID_MAJ_MASK GENMASK(23, 16)
43#define SLIM_REV_ID_MAJ(id) ((id & SLIM_REV_ID_MAJ_MASK) >> 16)
44
45
46
47#define SLIM_STBUS_SYNC_OFST 0xF88
48#define SLIM_STBUS_SYNC_DIS BIT(0)
49
50#define SLIM_INT_SET_OFST 0xFD4
51#define SLIM_INT_CLR_OFST 0xFD8
52#define SLIM_INT_MASK_OFST 0xFDC
53
54#define SLIM_CMD_CLR_OFST 0xFC8
55#define SLIM_CMD_MASK_OFST 0xFCC
56
57static const char *mem_names[ST_SLIM_MEM_MAX] = {
58 [ST_SLIM_DMEM] = "dmem",
59 [ST_SLIM_IMEM] = "imem",
60};
61
62static int slim_clk_get(struct st_slim_rproc *slim_rproc, struct device *dev)
63{
64 int clk, err;
65
66 for (clk = 0; clk < ST_SLIM_MAX_CLK; clk++) {
67 slim_rproc->clks[clk] = of_clk_get(dev->of_node, clk);
68 if (IS_ERR(slim_rproc->clks[clk])) {
69 err = PTR_ERR(slim_rproc->clks[clk]);
70 if (err == -EPROBE_DEFER)
71 goto err_put_clks;
72 slim_rproc->clks[clk] = NULL;
73 break;
74 }
75 }
76
77 return 0;
78
79err_put_clks:
80 while (--clk >= 0)
81 clk_put(slim_rproc->clks[clk]);
82
83 return err;
84}
85
86static void slim_clk_disable(struct st_slim_rproc *slim_rproc)
87{
88 int clk;
89
90 for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
91 clk_disable_unprepare(slim_rproc->clks[clk]);
92}
93
94static int slim_clk_enable(struct st_slim_rproc *slim_rproc)
95{
96 int clk, ret;
97
98 for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++) {
99 ret = clk_prepare_enable(slim_rproc->clks[clk]);
100 if (ret)
101 goto err_disable_clks;
102 }
103
104 return 0;
105
106err_disable_clks:
107 while (--clk >= 0)
108 clk_disable_unprepare(slim_rproc->clks[clk]);
109
110 return ret;
111}
112
113
114
115
116static int slim_rproc_start(struct rproc *rproc)
117{
118 struct device *dev = &rproc->dev;
119 struct st_slim_rproc *slim_rproc = rproc->priv;
120 unsigned long hw_id, hw_ver, fw_rev;
121 u32 val;
122
123
124 val = SLIM_CLK_GATE_DIS | SLIM_CLK_GATE_RESET;
125 writel(val, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
126
127
128 writel(SLIM_STBUS_SYNC_DIS, slim_rproc->peri + SLIM_STBUS_SYNC_OFST);
129
130
131 writel(!SLIM_CLK_GATE_DIS,
132 slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
133
134
135 writel(~0U, slim_rproc->peri + SLIM_INT_CLR_OFST);
136 writel(~0U, slim_rproc->peri + SLIM_CMD_CLR_OFST);
137
138
139 writel(~0U, slim_rproc->peri + SLIM_INT_MASK_OFST);
140 writel(~0U, slim_rproc->peri + SLIM_CMD_MASK_OFST);
141
142
143 writel(SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
144
145 hw_id = readl_relaxed(slim_rproc->slimcore + SLIM_ID_OFST);
146 hw_ver = readl_relaxed(slim_rproc->slimcore + SLIM_VER_OFST);
147
148 fw_rev = readl(slim_rproc->mem[ST_SLIM_DMEM].cpu_addr +
149 SLIM_REV_ID_OFST);
150
151 dev_info(dev, "fw rev:%ld.%ld on SLIM %ld.%ld\n",
152 SLIM_REV_ID_MAJ(fw_rev), SLIM_REV_ID_MIN(fw_rev),
153 hw_id, hw_ver);
154
155 return 0;
156}
157
158static int slim_rproc_stop(struct rproc *rproc)
159{
160 struct st_slim_rproc *slim_rproc = rproc->priv;
161 u32 val;
162
163
164 writel(0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
165 writel(0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);
166
167
168 writel(SLIM_CLK_GATE_DIS, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
169
170 writel(!SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
171
172 val = readl(slim_rproc->slimcore + SLIM_EN_OFST);
173 if (val & SLIM_EN_RUN)
174 dev_warn(&rproc->dev, "Failed to disable SLIM");
175
176 dev_dbg(&rproc->dev, "slim stopped\n");
177
178 return 0;
179}
180
181static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
182{
183 struct st_slim_rproc *slim_rproc = rproc->priv;
184 void *va = NULL;
185 int i;
186
187 for (i = 0; i < ST_SLIM_MEM_MAX; i++) {
188 if (da != slim_rproc->mem[i].bus_addr)
189 continue;
190
191 if (len <= slim_rproc->mem[i].size) {
192
193 va = (__force void *)slim_rproc->mem[i].cpu_addr;
194 break;
195 }
196 }
197
198 dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%x va = 0x%p\n", da, len, va);
199
200 return va;
201}
202
203static const struct rproc_ops slim_rproc_ops = {
204 .start = slim_rproc_start,
205 .stop = slim_rproc_stop,
206 .da_to_va = slim_rproc_da_to_va,
207};
208
209
210
211
212
213static struct resource_table empty_rsc_tbl = {
214 .ver = 1,
215 .num = 0,
216};
217
218static struct resource_table *slim_rproc_find_rsc_table(struct rproc *rproc,
219 const struct firmware *fw,
220 int *tablesz)
221{
222 *tablesz = sizeof(empty_rsc_tbl);
223 return &empty_rsc_tbl;
224}
225
226static struct rproc_fw_ops slim_rproc_fw_ops = {
227 .find_rsc_table = slim_rproc_find_rsc_table,
228};
229
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234
235
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237
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239
240
241
242
243struct st_slim_rproc *st_slim_rproc_alloc(struct platform_device *pdev,
244 char *fw_name)
245{
246 struct device *dev = &pdev->dev;
247 struct st_slim_rproc *slim_rproc;
248 struct device_node *np = dev->of_node;
249 struct rproc *rproc;
250 struct resource *res;
251 int err, i;
252 const struct rproc_fw_ops *elf_ops;
253
254 if (!fw_name)
255 return ERR_PTR(-EINVAL);
256
257 if (!of_device_is_compatible(np, "st,slim-rproc"))
258 return ERR_PTR(-EINVAL);
259
260 rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
261 fw_name, sizeof(*slim_rproc));
262 if (!rproc)
263 return ERR_PTR(-ENOMEM);
264
265 rproc->has_iommu = false;
266
267 slim_rproc = rproc->priv;
268 slim_rproc->rproc = rproc;
269
270 elf_ops = rproc->fw_ops;
271
272 slim_rproc_fw_ops.load = elf_ops->load;
273 slim_rproc_fw_ops.sanity_check = elf_ops->sanity_check;
274
275 rproc->fw_ops = &slim_rproc_fw_ops;
276
277
278 for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
279 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
280 mem_names[i]);
281
282 slim_rproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
283 if (IS_ERR(slim_rproc->mem[i].cpu_addr)) {
284 dev_err(&pdev->dev, "devm_ioremap_resource failed\n");
285 err = PTR_ERR(slim_rproc->mem[i].cpu_addr);
286 goto err;
287 }
288 slim_rproc->mem[i].bus_addr = res->start;
289 slim_rproc->mem[i].size = resource_size(res);
290 }
291
292 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "slimcore");
293 slim_rproc->slimcore = devm_ioremap_resource(dev, res);
294 if (IS_ERR(slim_rproc->slimcore)) {
295 dev_err(&pdev->dev, "failed to ioremap slimcore IO\n");
296 err = PTR_ERR(slim_rproc->slimcore);
297 goto err;
298 }
299
300 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "peripherals");
301 slim_rproc->peri = devm_ioremap_resource(dev, res);
302 if (IS_ERR(slim_rproc->peri)) {
303 dev_err(&pdev->dev, "failed to ioremap peripherals IO\n");
304 err = PTR_ERR(slim_rproc->peri);
305 goto err;
306 }
307
308 err = slim_clk_get(slim_rproc, dev);
309 if (err)
310 goto err;
311
312 err = slim_clk_enable(slim_rproc);
313 if (err) {
314 dev_err(dev, "Failed to enable clocks\n");
315 goto err_clk_put;
316 }
317
318
319 err = rproc_add(rproc);
320 if (err) {
321 dev_err(dev, "registration of slim remoteproc failed\n");
322 goto err_clk_dis;
323 }
324
325 return slim_rproc;
326
327err_clk_dis:
328 slim_clk_disable(slim_rproc);
329err_clk_put:
330 for (i = 0; i < ST_SLIM_MAX_CLK && slim_rproc->clks[i]; i++)
331 clk_put(slim_rproc->clks[i]);
332err:
333 rproc_free(rproc);
334 return ERR_PTR(err);
335}
336EXPORT_SYMBOL(st_slim_rproc_alloc);
337
338
339
340
341
342
343
344
345void st_slim_rproc_put(struct st_slim_rproc *slim_rproc)
346{
347 int clk;
348
349 if (!slim_rproc)
350 return;
351
352 slim_clk_disable(slim_rproc);
353
354 for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
355 clk_put(slim_rproc->clks[clk]);
356
357 rproc_del(slim_rproc->rproc);
358 rproc_free(slim_rproc->rproc);
359}
360EXPORT_SYMBOL(st_slim_rproc_put);
361
362MODULE_AUTHOR("Peter Griffin <peter.griffin@linaro.org>");
363MODULE_DESCRIPTION("STMicroelectronics SLIM core rproc driver");
364MODULE_LICENSE("GPL v2");
365
