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Commit | Line | Data |
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6a4ec4cd BB |
1 | /* |
2 | * EBI driver for Atmel chips | |
3 | * inspired by the fsl weim bus driver | |
4 | * | |
5 | * Copyright (C) 2013 Jean-Jacques Hiblot <jjhiblot@traphandler.com> | |
6 | * | |
7 | * This file is licensed under the terms of the GNU General Public | |
8 | * License version 2. This program is licensed "as is" without any | |
9 | * warranty of any kind, whether express or implied. | |
10 | */ | |
11 | ||
12 | #include <linux/clk.h> | |
13 | #include <linux/io.h> | |
14 | #include <linux/mfd/syscon.h> | |
15 | #include <linux/mfd/syscon/atmel-matrix.h> | |
16 | #include <linux/mfd/syscon/atmel-smc.h> | |
8a86a093 | 17 | #include <linux/init.h> |
6a4ec4cd BB |
18 | #include <linux/of_device.h> |
19 | #include <linux/regmap.h> | |
20 | ||
9453fa46 | 21 | struct atmel_ebi_dev_config { |
6a4ec4cd | 22 | int cs; |
8eb8c7d8 | 23 | struct atmel_smc_cs_conf smcconf; |
6a4ec4cd BB |
24 | }; |
25 | ||
9453fa46 | 26 | struct atmel_ebi; |
6a4ec4cd | 27 | |
9453fa46 | 28 | struct atmel_ebi_dev { |
6a4ec4cd | 29 | struct list_head node; |
9453fa46 | 30 | struct atmel_ebi *ebi; |
6a4ec4cd BB |
31 | u32 mode; |
32 | int numcs; | |
9453fa46 | 33 | struct atmel_ebi_dev_config configs[]; |
6a4ec4cd BB |
34 | }; |
35 | ||
9453fa46 | 36 | struct atmel_ebi_caps { |
6a4ec4cd | 37 | unsigned int available_cs; |
d9f81dad | 38 | unsigned int ebi_csa_offs; |
9453fa46 BB |
39 | void (*get_config)(struct atmel_ebi_dev *ebid, |
40 | struct atmel_ebi_dev_config *conf); | |
41 | int (*xlate_config)(struct atmel_ebi_dev *ebid, | |
6a4ec4cd | 42 | struct device_node *configs_np, |
9453fa46 BB |
43 | struct atmel_ebi_dev_config *conf); |
44 | void (*apply_config)(struct atmel_ebi_dev *ebid, | |
45 | struct atmel_ebi_dev_config *conf); | |
6a4ec4cd BB |
46 | }; |
47 | ||
9453fa46 | 48 | struct atmel_ebi { |
6a4ec4cd | 49 | struct clk *clk; |
6a4ec4cd | 50 | struct regmap *matrix; |
87108dc7 BB |
51 | struct { |
52 | struct regmap *regmap; | |
53 | struct clk *clk; | |
54 | } smc; | |
6a4ec4cd BB |
55 | |
56 | struct device *dev; | |
9453fa46 | 57 | const struct atmel_ebi_caps *caps; |
6a4ec4cd | 58 | struct list_head devs; |
6a4ec4cd BB |
59 | }; |
60 | ||
8eb8c7d8 BB |
61 | struct atmel_smc_timing_xlate { |
62 | const char *name; | |
63 | int (*converter)(struct atmel_smc_cs_conf *conf, | |
64 | unsigned int shift, unsigned int nycles); | |
65 | unsigned int shift; | |
66 | }; | |
67 | ||
68 | #define ATMEL_SMC_SETUP_XLATE(nm, pos) \ | |
69 | { .name = nm, .converter = atmel_smc_cs_conf_set_setup, .shift = pos} | |
70 | ||
71 | #define ATMEL_SMC_PULSE_XLATE(nm, pos) \ | |
72 | { .name = nm, .converter = atmel_smc_cs_conf_set_pulse, .shift = pos} | |
73 | ||
74 | #define ATMEL_SMC_CYCLE_XLATE(nm, pos) \ | |
75 | { .name = nm, .converter = atmel_smc_cs_conf_set_setup, .shift = pos} | |
76 | ||
9453fa46 BB |
77 | static void at91sam9_ebi_get_config(struct atmel_ebi_dev *ebid, |
78 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 79 | { |
8eb8c7d8 BB |
80 | atmel_smc_cs_conf_get(ebid->ebi->smc.regmap, conf->cs, |
81 | &conf->smcconf); | |
6a4ec4cd BB |
82 | } |
83 | ||
9453fa46 BB |
84 | static void sama5_ebi_get_config(struct atmel_ebi_dev *ebid, |
85 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 86 | { |
8eb8c7d8 BB |
87 | atmel_hsmc_cs_conf_get(ebid->ebi->smc.regmap, conf->cs, |
88 | &conf->smcconf); | |
6a4ec4cd BB |
89 | } |
90 | ||
8eb8c7d8 BB |
91 | static const struct atmel_smc_timing_xlate timings_xlate_table[] = { |
92 | ATMEL_SMC_SETUP_XLATE("atmel,smc-ncs-rd-setup-ns", | |
93 | ATMEL_SMC_NCS_RD_SHIFT), | |
94 | ATMEL_SMC_SETUP_XLATE("atmel,smc-ncs-wr-setup-ns", | |
95 | ATMEL_SMC_NCS_WR_SHIFT), | |
96 | ATMEL_SMC_SETUP_XLATE("atmel,smc-nrd-setup-ns", ATMEL_SMC_NRD_SHIFT), | |
97 | ATMEL_SMC_SETUP_XLATE("atmel,smc-nwe-setup-ns", ATMEL_SMC_NWE_SHIFT), | |
98 | ATMEL_SMC_PULSE_XLATE("atmel,smc-ncs-rd-pulse-ns", | |
99 | ATMEL_SMC_NCS_RD_SHIFT), | |
100 | ATMEL_SMC_PULSE_XLATE("atmel,smc-ncs-wr-pulse-ns", | |
101 | ATMEL_SMC_NCS_WR_SHIFT), | |
102 | ATMEL_SMC_PULSE_XLATE("atmel,smc-nrd-pulse-ns", ATMEL_SMC_NRD_SHIFT), | |
103 | ATMEL_SMC_PULSE_XLATE("atmel,smc-nwe-pulse-ns", ATMEL_SMC_NWE_SHIFT), | |
104 | ATMEL_SMC_CYCLE_XLATE("atmel,smc-nrd-cycle-ns", ATMEL_SMC_NRD_SHIFT), | |
105 | ATMEL_SMC_CYCLE_XLATE("atmel,smc-nwe-cycle-ns", ATMEL_SMC_NWE_SHIFT), | |
106 | }; | |
107 | ||
9453fa46 BB |
108 | static int atmel_ebi_xslate_smc_timings(struct atmel_ebi_dev *ebid, |
109 | struct device_node *np, | |
110 | struct atmel_smc_cs_conf *smcconf) | |
6a4ec4cd | 111 | { |
8eb8c7d8 BB |
112 | unsigned int clk_rate = clk_get_rate(ebid->ebi->clk); |
113 | unsigned int clk_period_ns = NSEC_PER_SEC / clk_rate; | |
114 | bool required = false; | |
115 | unsigned int ncycles; | |
116 | int ret, i; | |
117 | u32 val; | |
6a4ec4cd | 118 | |
8eb8c7d8 BB |
119 | ret = of_property_read_u32(np, "atmel,smc-tdf-ns", &val); |
120 | if (!ret) { | |
121 | required = true; | |
122 | ncycles = DIV_ROUND_UP(val, clk_period_ns); | |
1f6b5390 | 123 | if (ncycles > ATMEL_SMC_MODE_TDF_MAX) { |
8eb8c7d8 BB |
124 | ret = -EINVAL; |
125 | goto out; | |
126 | } | |
6a4ec4cd | 127 | |
1f6b5390 AD |
128 | if (ncycles < ATMEL_SMC_MODE_TDF_MIN) |
129 | ncycles = ATMEL_SMC_MODE_TDF_MIN; | |
130 | ||
8eb8c7d8 BB |
131 | smcconf->mode |= ATMEL_SMC_MODE_TDF(ncycles); |
132 | } | |
6a4ec4cd | 133 | |
8eb8c7d8 BB |
134 | for (i = 0; i < ARRAY_SIZE(timings_xlate_table); i++) { |
135 | const struct atmel_smc_timing_xlate *xlate; | |
6a4ec4cd | 136 | |
8eb8c7d8 | 137 | xlate = &timings_xlate_table[i]; |
6a4ec4cd | 138 | |
8eb8c7d8 BB |
139 | ret = of_property_read_u32(np, xlate->name, &val); |
140 | if (ret) { | |
141 | if (!required) | |
142 | continue; | |
143 | else | |
144 | break; | |
145 | } | |
6a4ec4cd | 146 | |
8eb8c7d8 BB |
147 | if (!required) { |
148 | ret = -EINVAL; | |
149 | break; | |
150 | } | |
6a4ec4cd | 151 | |
8eb8c7d8 BB |
152 | ncycles = DIV_ROUND_UP(val, clk_period_ns); |
153 | ret = xlate->converter(smcconf, xlate->shift, ncycles); | |
154 | if (ret) | |
155 | goto out; | |
156 | } | |
6a4ec4cd BB |
157 | |
158 | out: | |
8eb8c7d8 | 159 | if (ret) { |
6a4ec4cd BB |
160 | dev_err(ebid->ebi->dev, |
161 | "missing or invalid timings definition in %s", | |
162 | np->full_name); | |
8eb8c7d8 BB |
163 | return ret; |
164 | } | |
6a4ec4cd | 165 | |
8eb8c7d8 | 166 | return required; |
6a4ec4cd BB |
167 | } |
168 | ||
9453fa46 BB |
169 | static int atmel_ebi_xslate_smc_config(struct atmel_ebi_dev *ebid, |
170 | struct device_node *np, | |
171 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 172 | { |
8eb8c7d8 | 173 | struct atmel_smc_cs_conf *smcconf = &conf->smcconf; |
6a4ec4cd BB |
174 | bool required = false; |
175 | const char *tmp_str; | |
176 | u32 tmp; | |
177 | int ret; | |
178 | ||
179 | ret = of_property_read_u32(np, "atmel,smc-bus-width", &tmp); | |
180 | if (!ret) { | |
181 | switch (tmp) { | |
182 | case 8: | |
8eb8c7d8 | 183 | smcconf->mode |= ATMEL_SMC_MODE_DBW_8; |
6a4ec4cd BB |
184 | break; |
185 | ||
186 | case 16: | |
8eb8c7d8 | 187 | smcconf->mode |= ATMEL_SMC_MODE_DBW_16; |
6a4ec4cd BB |
188 | break; |
189 | ||
190 | case 32: | |
8eb8c7d8 | 191 | smcconf->mode |= ATMEL_SMC_MODE_DBW_32; |
6a4ec4cd BB |
192 | break; |
193 | ||
194 | default: | |
195 | return -EINVAL; | |
196 | } | |
197 | ||
198 | required = true; | |
199 | } | |
200 | ||
201 | if (of_property_read_bool(np, "atmel,smc-tdf-optimized")) { | |
8eb8c7d8 | 202 | smcconf->mode |= ATMEL_SMC_MODE_TDFMODE_OPTIMIZED; |
6a4ec4cd BB |
203 | required = true; |
204 | } | |
205 | ||
206 | tmp_str = NULL; | |
207 | of_property_read_string(np, "atmel,smc-byte-access-type", &tmp_str); | |
208 | if (tmp_str && !strcmp(tmp_str, "write")) { | |
8eb8c7d8 | 209 | smcconf->mode |= ATMEL_SMC_MODE_BAT_WRITE; |
6a4ec4cd BB |
210 | required = true; |
211 | } | |
212 | ||
213 | tmp_str = NULL; | |
214 | of_property_read_string(np, "atmel,smc-read-mode", &tmp_str); | |
215 | if (tmp_str && !strcmp(tmp_str, "nrd")) { | |
8eb8c7d8 | 216 | smcconf->mode |= ATMEL_SMC_MODE_READMODE_NRD; |
6a4ec4cd BB |
217 | required = true; |
218 | } | |
219 | ||
220 | tmp_str = NULL; | |
221 | of_property_read_string(np, "atmel,smc-write-mode", &tmp_str); | |
222 | if (tmp_str && !strcmp(tmp_str, "nwe")) { | |
8eb8c7d8 | 223 | smcconf->mode |= ATMEL_SMC_MODE_WRITEMODE_NWE; |
6a4ec4cd BB |
224 | required = true; |
225 | } | |
226 | ||
227 | tmp_str = NULL; | |
228 | of_property_read_string(np, "atmel,smc-exnw-mode", &tmp_str); | |
229 | if (tmp_str) { | |
230 | if (!strcmp(tmp_str, "frozen")) | |
8eb8c7d8 | 231 | smcconf->mode |= ATMEL_SMC_MODE_EXNWMODE_FROZEN; |
6a4ec4cd | 232 | else if (!strcmp(tmp_str, "ready")) |
8eb8c7d8 | 233 | smcconf->mode |= ATMEL_SMC_MODE_EXNWMODE_READY; |
6a4ec4cd BB |
234 | else if (strcmp(tmp_str, "disabled")) |
235 | return -EINVAL; | |
236 | ||
237 | required = true; | |
238 | } | |
239 | ||
240 | ret = of_property_read_u32(np, "atmel,smc-page-mode", &tmp); | |
241 | if (!ret) { | |
242 | switch (tmp) { | |
243 | case 4: | |
8eb8c7d8 | 244 | smcconf->mode |= ATMEL_SMC_MODE_PS_4; |
6a4ec4cd BB |
245 | break; |
246 | ||
247 | case 8: | |
8eb8c7d8 | 248 | smcconf->mode |= ATMEL_SMC_MODE_PS_8; |
6a4ec4cd BB |
249 | break; |
250 | ||
251 | case 16: | |
8eb8c7d8 | 252 | smcconf->mode |= ATMEL_SMC_MODE_PS_16; |
6a4ec4cd BB |
253 | break; |
254 | ||
255 | case 32: | |
8eb8c7d8 | 256 | smcconf->mode |= ATMEL_SMC_MODE_PS_32; |
6a4ec4cd BB |
257 | break; |
258 | ||
259 | default: | |
260 | return -EINVAL; | |
261 | } | |
262 | ||
8eb8c7d8 | 263 | smcconf->mode |= ATMEL_SMC_MODE_PMEN; |
6a4ec4cd BB |
264 | required = true; |
265 | } | |
266 | ||
9453fa46 | 267 | ret = atmel_ebi_xslate_smc_timings(ebid, np, &conf->smcconf); |
bc9b934b | 268 | if (ret < 0) |
8eb8c7d8 | 269 | return -EINVAL; |
6a4ec4cd | 270 | |
8eb8c7d8 BB |
271 | if ((ret > 0 && !required) || (!ret && required)) { |
272 | dev_err(ebid->ebi->dev, "missing atmel,smc- properties in %s", | |
273 | np->full_name); | |
274 | return -EINVAL; | |
275 | } | |
6a4ec4cd | 276 | |
8eb8c7d8 | 277 | return required; |
6a4ec4cd BB |
278 | } |
279 | ||
9453fa46 BB |
280 | static void at91sam9_ebi_apply_config(struct atmel_ebi_dev *ebid, |
281 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 282 | { |
8eb8c7d8 BB |
283 | atmel_smc_cs_conf_apply(ebid->ebi->smc.regmap, conf->cs, |
284 | &conf->smcconf); | |
6a4ec4cd BB |
285 | } |
286 | ||
9453fa46 BB |
287 | static void sama5_ebi_apply_config(struct atmel_ebi_dev *ebid, |
288 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 289 | { |
8eb8c7d8 BB |
290 | atmel_hsmc_cs_conf_apply(ebid->ebi->smc.regmap, conf->cs, |
291 | &conf->smcconf); | |
6a4ec4cd BB |
292 | } |
293 | ||
9453fa46 BB |
294 | static int atmel_ebi_dev_setup(struct atmel_ebi *ebi, struct device_node *np, |
295 | int reg_cells) | |
6a4ec4cd | 296 | { |
9453fa46 BB |
297 | const struct atmel_ebi_caps *caps = ebi->caps; |
298 | struct atmel_ebi_dev_config conf = { }; | |
6a4ec4cd | 299 | struct device *dev = ebi->dev; |
9453fa46 | 300 | struct atmel_ebi_dev *ebid; |
987e079e BB |
301 | unsigned long cslines = 0; |
302 | int ret, numcs = 0, nentries, i; | |
6a4ec4cd | 303 | bool apply = false; |
987e079e | 304 | u32 cs; |
6a4ec4cd | 305 | |
987e079e BB |
306 | nentries = of_property_count_elems_of_size(np, "reg", |
307 | reg_cells * sizeof(u32)); | |
308 | for (i = 0; i < nentries; i++) { | |
309 | ret = of_property_read_u32_index(np, "reg", i * reg_cells, | |
310 | &cs); | |
311 | if (ret) | |
312 | return ret; | |
313 | ||
314 | if (cs >= AT91_MATRIX_EBI_NUM_CS || | |
315 | !(ebi->caps->available_cs & BIT(cs))) { | |
316 | dev_err(dev, "invalid reg property in %s\n", | |
317 | np->full_name); | |
318 | return -EINVAL; | |
319 | } | |
320 | ||
321 | if (!test_and_set_bit(cs, &cslines)) | |
322 | numcs++; | |
323 | } | |
324 | ||
325 | if (!numcs) { | |
6a4ec4cd BB |
326 | dev_err(dev, "invalid reg property in %s\n", np->full_name); |
327 | return -EINVAL; | |
328 | } | |
329 | ||
330 | ebid = devm_kzalloc(ebi->dev, | |
331 | sizeof(*ebid) + (numcs * sizeof(*ebid->configs)), | |
332 | GFP_KERNEL); | |
333 | if (!ebid) | |
334 | return -ENOMEM; | |
335 | ||
336 | ebid->ebi = ebi; | |
aaa572b9 | 337 | ebid->numcs = numcs; |
6a4ec4cd BB |
338 | |
339 | ret = caps->xlate_config(ebid, np, &conf); | |
340 | if (ret < 0) | |
341 | return ret; | |
342 | else if (ret) | |
343 | apply = true; | |
344 | ||
987e079e BB |
345 | i = 0; |
346 | for_each_set_bit(cs, &cslines, AT91_MATRIX_EBI_NUM_CS) { | |
6a4ec4cd BB |
347 | ebid->configs[i].cs = cs; |
348 | ||
349 | if (apply) { | |
350 | conf.cs = cs; | |
8eb8c7d8 | 351 | caps->apply_config(ebid, &conf); |
6a4ec4cd BB |
352 | } |
353 | ||
354 | caps->get_config(ebid, &ebid->configs[i]); | |
355 | ||
356 | /* | |
357 | * Attach the EBI device to the generic SMC logic if at least | |
358 | * one "atmel,smc-" property is present. | |
359 | */ | |
d9f81dad BB |
360 | if (ebi->caps->ebi_csa_offs && apply) |
361 | regmap_update_bits(ebi->matrix, | |
362 | ebi->caps->ebi_csa_offs, | |
363 | BIT(cs), 0); | |
987e079e BB |
364 | |
365 | i++; | |
6a4ec4cd BB |
366 | } |
367 | ||
368 | list_add_tail(&ebid->node, &ebi->devs); | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
9453fa46 | 373 | static const struct atmel_ebi_caps at91sam9260_ebi_caps = { |
6a4ec4cd | 374 | .available_cs = 0xff, |
d9f81dad | 375 | .ebi_csa_offs = AT91SAM9260_MATRIX_EBICSA, |
6a4ec4cd | 376 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 377 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 378 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
379 | }; |
380 | ||
9453fa46 | 381 | static const struct atmel_ebi_caps at91sam9261_ebi_caps = { |
6a4ec4cd | 382 | .available_cs = 0xff, |
d9f81dad | 383 | .ebi_csa_offs = AT91SAM9261_MATRIX_EBICSA, |
6a4ec4cd | 384 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 385 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 386 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
387 | }; |
388 | ||
9453fa46 | 389 | static const struct atmel_ebi_caps at91sam9263_ebi0_caps = { |
6a4ec4cd | 390 | .available_cs = 0x3f, |
d9f81dad | 391 | .ebi_csa_offs = AT91SAM9263_MATRIX_EBI0CSA, |
6a4ec4cd | 392 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 393 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 394 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
395 | }; |
396 | ||
9453fa46 | 397 | static const struct atmel_ebi_caps at91sam9263_ebi1_caps = { |
6a4ec4cd | 398 | .available_cs = 0x7, |
d9f81dad | 399 | .ebi_csa_offs = AT91SAM9263_MATRIX_EBI1CSA, |
6a4ec4cd | 400 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 401 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 402 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
403 | }; |
404 | ||
9453fa46 | 405 | static const struct atmel_ebi_caps at91sam9rl_ebi_caps = { |
6a4ec4cd | 406 | .available_cs = 0x3f, |
d9f81dad | 407 | .ebi_csa_offs = AT91SAM9RL_MATRIX_EBICSA, |
6a4ec4cd | 408 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 409 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 410 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
411 | }; |
412 | ||
9453fa46 | 413 | static const struct atmel_ebi_caps at91sam9g45_ebi_caps = { |
6a4ec4cd | 414 | .available_cs = 0x3f, |
d9f81dad | 415 | .ebi_csa_offs = AT91SAM9G45_MATRIX_EBICSA, |
6a4ec4cd | 416 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 417 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 418 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
419 | }; |
420 | ||
9453fa46 | 421 | static const struct atmel_ebi_caps at91sam9x5_ebi_caps = { |
6a4ec4cd | 422 | .available_cs = 0x3f, |
d9f81dad | 423 | .ebi_csa_offs = AT91SAM9X5_MATRIX_EBICSA, |
6a4ec4cd | 424 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 425 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 426 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
427 | }; |
428 | ||
9453fa46 | 429 | static const struct atmel_ebi_caps sama5d3_ebi_caps = { |
6a4ec4cd | 430 | .available_cs = 0xf, |
8eb8c7d8 | 431 | .get_config = sama5_ebi_get_config, |
9453fa46 | 432 | .xlate_config = atmel_ebi_xslate_smc_config, |
8eb8c7d8 | 433 | .apply_config = sama5_ebi_apply_config, |
6a4ec4cd BB |
434 | }; |
435 | ||
9453fa46 | 436 | static const struct of_device_id atmel_ebi_id_table[] = { |
6a4ec4cd BB |
437 | { |
438 | .compatible = "atmel,at91sam9260-ebi", | |
439 | .data = &at91sam9260_ebi_caps, | |
440 | }, | |
441 | { | |
442 | .compatible = "atmel,at91sam9261-ebi", | |
443 | .data = &at91sam9261_ebi_caps, | |
444 | }, | |
445 | { | |
446 | .compatible = "atmel,at91sam9263-ebi0", | |
447 | .data = &at91sam9263_ebi0_caps, | |
448 | }, | |
449 | { | |
450 | .compatible = "atmel,at91sam9263-ebi1", | |
451 | .data = &at91sam9263_ebi1_caps, | |
452 | }, | |
453 | { | |
454 | .compatible = "atmel,at91sam9rl-ebi", | |
455 | .data = &at91sam9rl_ebi_caps, | |
456 | }, | |
457 | { | |
458 | .compatible = "atmel,at91sam9g45-ebi", | |
459 | .data = &at91sam9g45_ebi_caps, | |
460 | }, | |
461 | { | |
462 | .compatible = "atmel,at91sam9x5-ebi", | |
463 | .data = &at91sam9x5_ebi_caps, | |
464 | }, | |
465 | { | |
466 | .compatible = "atmel,sama5d3-ebi", | |
467 | .data = &sama5d3_ebi_caps, | |
468 | }, | |
469 | { /* sentinel */ } | |
470 | }; | |
6a4ec4cd | 471 | |
9453fa46 | 472 | static int atmel_ebi_dev_disable(struct atmel_ebi *ebi, struct device_node *np) |
6a4ec4cd BB |
473 | { |
474 | struct device *dev = ebi->dev; | |
475 | struct property *newprop; | |
476 | ||
477 | newprop = devm_kzalloc(dev, sizeof(*newprop), GFP_KERNEL); | |
478 | if (!newprop) | |
479 | return -ENOMEM; | |
480 | ||
481 | newprop->name = devm_kstrdup(dev, "status", GFP_KERNEL); | |
482 | if (!newprop->name) | |
483 | return -ENOMEM; | |
484 | ||
485 | newprop->value = devm_kstrdup(dev, "disabled", GFP_KERNEL); | |
ecc2d430 | 486 | if (!newprop->value) |
6a4ec4cd BB |
487 | return -ENOMEM; |
488 | ||
489 | newprop->length = sizeof("disabled"); | |
490 | ||
491 | return of_update_property(np, newprop); | |
492 | } | |
493 | ||
9453fa46 | 494 | static int atmel_ebi_probe(struct platform_device *pdev) |
6a4ec4cd BB |
495 | { |
496 | struct device *dev = &pdev->dev; | |
87108dc7 | 497 | struct device_node *child, *np = dev->of_node, *smc_np; |
6a4ec4cd | 498 | const struct of_device_id *match; |
9453fa46 | 499 | struct atmel_ebi *ebi; |
6a4ec4cd BB |
500 | int ret, reg_cells; |
501 | struct clk *clk; | |
502 | u32 val; | |
503 | ||
9453fa46 | 504 | match = of_match_device(atmel_ebi_id_table, dev); |
6a4ec4cd BB |
505 | if (!match || !match->data) |
506 | return -EINVAL; | |
507 | ||
508 | ebi = devm_kzalloc(dev, sizeof(*ebi), GFP_KERNEL); | |
509 | if (!ebi) | |
510 | return -ENOMEM; | |
511 | ||
4407319d BB |
512 | platform_set_drvdata(pdev, ebi); |
513 | ||
6a4ec4cd BB |
514 | INIT_LIST_HEAD(&ebi->devs); |
515 | ebi->caps = match->data; | |
516 | ebi->dev = dev; | |
517 | ||
518 | clk = devm_clk_get(dev, NULL); | |
519 | if (IS_ERR(clk)) | |
520 | return PTR_ERR(clk); | |
521 | ||
522 | ebi->clk = clk; | |
523 | ||
87108dc7 BB |
524 | smc_np = of_parse_phandle(dev->of_node, "atmel,smc", 0); |
525 | ||
526 | ebi->smc.regmap = syscon_node_to_regmap(smc_np); | |
527 | if (IS_ERR(ebi->smc.regmap)) | |
528 | return PTR_ERR(ebi->smc.regmap); | |
529 | ||
530 | ebi->smc.clk = of_clk_get(smc_np, 0); | |
531 | if (IS_ERR(ebi->smc.clk)) { | |
532 | if (PTR_ERR(ebi->smc.clk) != -ENOENT) | |
533 | return PTR_ERR(ebi->smc.clk); | |
534 | ||
535 | ebi->smc.clk = NULL; | |
536 | } | |
537 | ret = clk_prepare_enable(ebi->smc.clk); | |
538 | if (ret) | |
539 | return ret; | |
6a4ec4cd BB |
540 | |
541 | /* | |
542 | * The sama5d3 does not provide an EBICSA register and thus does need | |
543 | * to access the matrix registers. | |
544 | */ | |
d9f81dad | 545 | if (ebi->caps->ebi_csa_offs) { |
6a4ec4cd BB |
546 | ebi->matrix = |
547 | syscon_regmap_lookup_by_phandle(np, "atmel,matrix"); | |
548 | if (IS_ERR(ebi->matrix)) | |
549 | return PTR_ERR(ebi->matrix); | |
6a4ec4cd BB |
550 | } |
551 | ||
6a4ec4cd BB |
552 | ret = of_property_read_u32(np, "#address-cells", &val); |
553 | if (ret) { | |
554 | dev_err(dev, "missing #address-cells property\n"); | |
555 | return ret; | |
556 | } | |
557 | ||
558 | reg_cells = val; | |
559 | ||
560 | ret = of_property_read_u32(np, "#size-cells", &val); | |
561 | if (ret) { | |
562 | dev_err(dev, "missing #address-cells property\n"); | |
563 | return ret; | |
564 | } | |
565 | ||
566 | reg_cells += val; | |
567 | ||
568 | for_each_available_child_of_node(np, child) { | |
569 | if (!of_find_property(child, "reg", NULL)) | |
570 | continue; | |
571 | ||
9453fa46 | 572 | ret = atmel_ebi_dev_setup(ebi, child, reg_cells); |
6a4ec4cd BB |
573 | if (ret) { |
574 | dev_err(dev, "failed to configure EBI bus for %s, disabling the device", | |
575 | child->full_name); | |
576 | ||
9453fa46 | 577 | ret = atmel_ebi_dev_disable(ebi, child); |
6a4ec4cd BB |
578 | if (ret) |
579 | return ret; | |
580 | } | |
581 | } | |
582 | ||
583 | return of_platform_populate(np, NULL, NULL, dev); | |
584 | } | |
585 | ||
41b80bb1 | 586 | static __maybe_unused int atmel_ebi_resume(struct device *dev) |
4407319d BB |
587 | { |
588 | struct atmel_ebi *ebi = dev_get_drvdata(dev); | |
589 | struct atmel_ebi_dev *ebid; | |
590 | ||
591 | list_for_each_entry(ebid, &ebi->devs, node) { | |
592 | int i; | |
593 | ||
594 | for (i = 0; i < ebid->numcs; i++) | |
595 | ebid->ebi->caps->apply_config(ebid, &ebid->configs[i]); | |
596 | } | |
597 | ||
598 | return 0; | |
599 | } | |
600 | ||
601 | static SIMPLE_DEV_PM_OPS(atmel_ebi_pm_ops, NULL, atmel_ebi_resume); | |
602 | ||
9453fa46 | 603 | static struct platform_driver atmel_ebi_driver = { |
6a4ec4cd BB |
604 | .driver = { |
605 | .name = "atmel-ebi", | |
9453fa46 | 606 | .of_match_table = atmel_ebi_id_table, |
4407319d | 607 | .pm = &atmel_ebi_pm_ops, |
6a4ec4cd BB |
608 | }, |
609 | }; | |
9453fa46 | 610 | builtin_platform_driver_probe(atmel_ebi_driver, atmel_ebi_probe); |