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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); | |
123 | if (ncycles > ATMEL_SMC_MODE_TDF_MAX || | |
124 | ncycles < ATMEL_SMC_MODE_TDF_MIN) { | |
125 | ret = -EINVAL; | |
126 | goto out; | |
127 | } | |
6a4ec4cd | 128 | |
8eb8c7d8 BB |
129 | smcconf->mode |= ATMEL_SMC_MODE_TDF(ncycles); |
130 | } | |
6a4ec4cd | 131 | |
8eb8c7d8 BB |
132 | for (i = 0; i < ARRAY_SIZE(timings_xlate_table); i++) { |
133 | const struct atmel_smc_timing_xlate *xlate; | |
6a4ec4cd | 134 | |
8eb8c7d8 | 135 | xlate = &timings_xlate_table[i]; |
6a4ec4cd | 136 | |
8eb8c7d8 BB |
137 | ret = of_property_read_u32(np, xlate->name, &val); |
138 | if (ret) { | |
139 | if (!required) | |
140 | continue; | |
141 | else | |
142 | break; | |
143 | } | |
6a4ec4cd | 144 | |
8eb8c7d8 BB |
145 | if (!required) { |
146 | ret = -EINVAL; | |
147 | break; | |
148 | } | |
6a4ec4cd | 149 | |
8eb8c7d8 BB |
150 | ncycles = DIV_ROUND_UP(val, clk_period_ns); |
151 | ret = xlate->converter(smcconf, xlate->shift, ncycles); | |
152 | if (ret) | |
153 | goto out; | |
154 | } | |
6a4ec4cd BB |
155 | |
156 | out: | |
8eb8c7d8 | 157 | if (ret) { |
6a4ec4cd | 158 | dev_err(ebid->ebi->dev, |
db749d17 RH |
159 | "missing or invalid timings definition in %pOF", |
160 | np); | |
8eb8c7d8 BB |
161 | return ret; |
162 | } | |
6a4ec4cd | 163 | |
8eb8c7d8 | 164 | return required; |
6a4ec4cd BB |
165 | } |
166 | ||
9453fa46 BB |
167 | static int atmel_ebi_xslate_smc_config(struct atmel_ebi_dev *ebid, |
168 | struct device_node *np, | |
169 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 170 | { |
8eb8c7d8 | 171 | struct atmel_smc_cs_conf *smcconf = &conf->smcconf; |
6a4ec4cd BB |
172 | bool required = false; |
173 | const char *tmp_str; | |
174 | u32 tmp; | |
175 | int ret; | |
176 | ||
177 | ret = of_property_read_u32(np, "atmel,smc-bus-width", &tmp); | |
178 | if (!ret) { | |
179 | switch (tmp) { | |
180 | case 8: | |
8eb8c7d8 | 181 | smcconf->mode |= ATMEL_SMC_MODE_DBW_8; |
6a4ec4cd BB |
182 | break; |
183 | ||
184 | case 16: | |
8eb8c7d8 | 185 | smcconf->mode |= ATMEL_SMC_MODE_DBW_16; |
6a4ec4cd BB |
186 | break; |
187 | ||
188 | case 32: | |
8eb8c7d8 | 189 | smcconf->mode |= ATMEL_SMC_MODE_DBW_32; |
6a4ec4cd BB |
190 | break; |
191 | ||
192 | default: | |
193 | return -EINVAL; | |
194 | } | |
195 | ||
196 | required = true; | |
197 | } | |
198 | ||
199 | if (of_property_read_bool(np, "atmel,smc-tdf-optimized")) { | |
8eb8c7d8 | 200 | smcconf->mode |= ATMEL_SMC_MODE_TDFMODE_OPTIMIZED; |
6a4ec4cd BB |
201 | required = true; |
202 | } | |
203 | ||
204 | tmp_str = NULL; | |
205 | of_property_read_string(np, "atmel,smc-byte-access-type", &tmp_str); | |
206 | if (tmp_str && !strcmp(tmp_str, "write")) { | |
8eb8c7d8 | 207 | smcconf->mode |= ATMEL_SMC_MODE_BAT_WRITE; |
6a4ec4cd BB |
208 | required = true; |
209 | } | |
210 | ||
211 | tmp_str = NULL; | |
212 | of_property_read_string(np, "atmel,smc-read-mode", &tmp_str); | |
213 | if (tmp_str && !strcmp(tmp_str, "nrd")) { | |
8eb8c7d8 | 214 | smcconf->mode |= ATMEL_SMC_MODE_READMODE_NRD; |
6a4ec4cd BB |
215 | required = true; |
216 | } | |
217 | ||
218 | tmp_str = NULL; | |
219 | of_property_read_string(np, "atmel,smc-write-mode", &tmp_str); | |
220 | if (tmp_str && !strcmp(tmp_str, "nwe")) { | |
8eb8c7d8 | 221 | smcconf->mode |= ATMEL_SMC_MODE_WRITEMODE_NWE; |
6a4ec4cd BB |
222 | required = true; |
223 | } | |
224 | ||
225 | tmp_str = NULL; | |
226 | of_property_read_string(np, "atmel,smc-exnw-mode", &tmp_str); | |
227 | if (tmp_str) { | |
228 | if (!strcmp(tmp_str, "frozen")) | |
8eb8c7d8 | 229 | smcconf->mode |= ATMEL_SMC_MODE_EXNWMODE_FROZEN; |
6a4ec4cd | 230 | else if (!strcmp(tmp_str, "ready")) |
8eb8c7d8 | 231 | smcconf->mode |= ATMEL_SMC_MODE_EXNWMODE_READY; |
6a4ec4cd BB |
232 | else if (strcmp(tmp_str, "disabled")) |
233 | return -EINVAL; | |
234 | ||
235 | required = true; | |
236 | } | |
237 | ||
238 | ret = of_property_read_u32(np, "atmel,smc-page-mode", &tmp); | |
239 | if (!ret) { | |
240 | switch (tmp) { | |
241 | case 4: | |
8eb8c7d8 | 242 | smcconf->mode |= ATMEL_SMC_MODE_PS_4; |
6a4ec4cd BB |
243 | break; |
244 | ||
245 | case 8: | |
8eb8c7d8 | 246 | smcconf->mode |= ATMEL_SMC_MODE_PS_8; |
6a4ec4cd BB |
247 | break; |
248 | ||
249 | case 16: | |
8eb8c7d8 | 250 | smcconf->mode |= ATMEL_SMC_MODE_PS_16; |
6a4ec4cd BB |
251 | break; |
252 | ||
253 | case 32: | |
8eb8c7d8 | 254 | smcconf->mode |= ATMEL_SMC_MODE_PS_32; |
6a4ec4cd BB |
255 | break; |
256 | ||
257 | default: | |
258 | return -EINVAL; | |
259 | } | |
260 | ||
8eb8c7d8 | 261 | smcconf->mode |= ATMEL_SMC_MODE_PMEN; |
6a4ec4cd BB |
262 | required = true; |
263 | } | |
264 | ||
9453fa46 | 265 | ret = atmel_ebi_xslate_smc_timings(ebid, np, &conf->smcconf); |
6a4ec4cd | 266 | if (ret) |
8eb8c7d8 | 267 | return -EINVAL; |
6a4ec4cd | 268 | |
8eb8c7d8 | 269 | if ((ret > 0 && !required) || (!ret && required)) { |
db749d17 RH |
270 | dev_err(ebid->ebi->dev, "missing atmel,smc- properties in %pOF", |
271 | np); | |
8eb8c7d8 BB |
272 | return -EINVAL; |
273 | } | |
6a4ec4cd | 274 | |
8eb8c7d8 | 275 | return required; |
6a4ec4cd BB |
276 | } |
277 | ||
9453fa46 BB |
278 | static void at91sam9_ebi_apply_config(struct atmel_ebi_dev *ebid, |
279 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 280 | { |
8eb8c7d8 BB |
281 | atmel_smc_cs_conf_apply(ebid->ebi->smc.regmap, conf->cs, |
282 | &conf->smcconf); | |
6a4ec4cd BB |
283 | } |
284 | ||
9453fa46 BB |
285 | static void sama5_ebi_apply_config(struct atmel_ebi_dev *ebid, |
286 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 287 | { |
8eb8c7d8 BB |
288 | atmel_hsmc_cs_conf_apply(ebid->ebi->smc.regmap, conf->cs, |
289 | &conf->smcconf); | |
6a4ec4cd BB |
290 | } |
291 | ||
9453fa46 BB |
292 | static int atmel_ebi_dev_setup(struct atmel_ebi *ebi, struct device_node *np, |
293 | int reg_cells) | |
6a4ec4cd | 294 | { |
9453fa46 BB |
295 | const struct atmel_ebi_caps *caps = ebi->caps; |
296 | struct atmel_ebi_dev_config conf = { }; | |
6a4ec4cd | 297 | struct device *dev = ebi->dev; |
9453fa46 | 298 | struct atmel_ebi_dev *ebid; |
987e079e BB |
299 | unsigned long cslines = 0; |
300 | int ret, numcs = 0, nentries, i; | |
6a4ec4cd | 301 | bool apply = false; |
987e079e | 302 | u32 cs; |
6a4ec4cd | 303 | |
987e079e BB |
304 | nentries = of_property_count_elems_of_size(np, "reg", |
305 | reg_cells * sizeof(u32)); | |
306 | for (i = 0; i < nentries; i++) { | |
307 | ret = of_property_read_u32_index(np, "reg", i * reg_cells, | |
308 | &cs); | |
309 | if (ret) | |
310 | return ret; | |
311 | ||
312 | if (cs >= AT91_MATRIX_EBI_NUM_CS || | |
313 | !(ebi->caps->available_cs & BIT(cs))) { | |
db749d17 | 314 | dev_err(dev, "invalid reg property in %pOF\n", np); |
987e079e BB |
315 | return -EINVAL; |
316 | } | |
317 | ||
318 | if (!test_and_set_bit(cs, &cslines)) | |
319 | numcs++; | |
320 | } | |
321 | ||
322 | if (!numcs) { | |
db749d17 | 323 | dev_err(dev, "invalid reg property in %pOF\n", np); |
6a4ec4cd BB |
324 | return -EINVAL; |
325 | } | |
326 | ||
327 | ebid = devm_kzalloc(ebi->dev, | |
328 | sizeof(*ebid) + (numcs * sizeof(*ebid->configs)), | |
329 | GFP_KERNEL); | |
330 | if (!ebid) | |
331 | return -ENOMEM; | |
332 | ||
333 | ebid->ebi = ebi; | |
aaa572b9 | 334 | ebid->numcs = numcs; |
6a4ec4cd BB |
335 | |
336 | ret = caps->xlate_config(ebid, np, &conf); | |
337 | if (ret < 0) | |
338 | return ret; | |
339 | else if (ret) | |
340 | apply = true; | |
341 | ||
987e079e BB |
342 | i = 0; |
343 | for_each_set_bit(cs, &cslines, AT91_MATRIX_EBI_NUM_CS) { | |
6a4ec4cd BB |
344 | ebid->configs[i].cs = cs; |
345 | ||
346 | if (apply) { | |
347 | conf.cs = cs; | |
8eb8c7d8 | 348 | caps->apply_config(ebid, &conf); |
6a4ec4cd BB |
349 | } |
350 | ||
351 | caps->get_config(ebid, &ebid->configs[i]); | |
352 | ||
353 | /* | |
354 | * Attach the EBI device to the generic SMC logic if at least | |
355 | * one "atmel,smc-" property is present. | |
356 | */ | |
d9f81dad BB |
357 | if (ebi->caps->ebi_csa_offs && apply) |
358 | regmap_update_bits(ebi->matrix, | |
359 | ebi->caps->ebi_csa_offs, | |
360 | BIT(cs), 0); | |
987e079e BB |
361 | |
362 | i++; | |
6a4ec4cd BB |
363 | } |
364 | ||
365 | list_add_tail(&ebid->node, &ebi->devs); | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
9453fa46 | 370 | static const struct atmel_ebi_caps at91sam9260_ebi_caps = { |
6a4ec4cd | 371 | .available_cs = 0xff, |
d9f81dad | 372 | .ebi_csa_offs = AT91SAM9260_MATRIX_EBICSA, |
6a4ec4cd | 373 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 374 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 375 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
376 | }; |
377 | ||
9453fa46 | 378 | static const struct atmel_ebi_caps at91sam9261_ebi_caps = { |
6a4ec4cd | 379 | .available_cs = 0xff, |
d9f81dad | 380 | .ebi_csa_offs = AT91SAM9261_MATRIX_EBICSA, |
6a4ec4cd | 381 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 382 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 383 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
384 | }; |
385 | ||
9453fa46 | 386 | static const struct atmel_ebi_caps at91sam9263_ebi0_caps = { |
6a4ec4cd | 387 | .available_cs = 0x3f, |
d9f81dad | 388 | .ebi_csa_offs = AT91SAM9263_MATRIX_EBI0CSA, |
6a4ec4cd | 389 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 390 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 391 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
392 | }; |
393 | ||
9453fa46 | 394 | static const struct atmel_ebi_caps at91sam9263_ebi1_caps = { |
6a4ec4cd | 395 | .available_cs = 0x7, |
d9f81dad | 396 | .ebi_csa_offs = AT91SAM9263_MATRIX_EBI1CSA, |
6a4ec4cd | 397 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 398 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 399 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
400 | }; |
401 | ||
9453fa46 | 402 | static const struct atmel_ebi_caps at91sam9rl_ebi_caps = { |
6a4ec4cd | 403 | .available_cs = 0x3f, |
d9f81dad | 404 | .ebi_csa_offs = AT91SAM9RL_MATRIX_EBICSA, |
6a4ec4cd | 405 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 406 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 407 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
408 | }; |
409 | ||
9453fa46 | 410 | static const struct atmel_ebi_caps at91sam9g45_ebi_caps = { |
6a4ec4cd | 411 | .available_cs = 0x3f, |
d9f81dad | 412 | .ebi_csa_offs = AT91SAM9G45_MATRIX_EBICSA, |
6a4ec4cd | 413 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 414 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 415 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
416 | }; |
417 | ||
9453fa46 | 418 | static const struct atmel_ebi_caps at91sam9x5_ebi_caps = { |
6a4ec4cd | 419 | .available_cs = 0x3f, |
d9f81dad | 420 | .ebi_csa_offs = AT91SAM9X5_MATRIX_EBICSA, |
6a4ec4cd | 421 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 422 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 423 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
424 | }; |
425 | ||
9453fa46 | 426 | static const struct atmel_ebi_caps sama5d3_ebi_caps = { |
6a4ec4cd | 427 | .available_cs = 0xf, |
8eb8c7d8 | 428 | .get_config = sama5_ebi_get_config, |
9453fa46 | 429 | .xlate_config = atmel_ebi_xslate_smc_config, |
8eb8c7d8 | 430 | .apply_config = sama5_ebi_apply_config, |
6a4ec4cd BB |
431 | }; |
432 | ||
9453fa46 | 433 | static const struct of_device_id atmel_ebi_id_table[] = { |
6a4ec4cd BB |
434 | { |
435 | .compatible = "atmel,at91sam9260-ebi", | |
436 | .data = &at91sam9260_ebi_caps, | |
437 | }, | |
438 | { | |
439 | .compatible = "atmel,at91sam9261-ebi", | |
440 | .data = &at91sam9261_ebi_caps, | |
441 | }, | |
442 | { | |
443 | .compatible = "atmel,at91sam9263-ebi0", | |
444 | .data = &at91sam9263_ebi0_caps, | |
445 | }, | |
446 | { | |
447 | .compatible = "atmel,at91sam9263-ebi1", | |
448 | .data = &at91sam9263_ebi1_caps, | |
449 | }, | |
450 | { | |
451 | .compatible = "atmel,at91sam9rl-ebi", | |
452 | .data = &at91sam9rl_ebi_caps, | |
453 | }, | |
454 | { | |
455 | .compatible = "atmel,at91sam9g45-ebi", | |
456 | .data = &at91sam9g45_ebi_caps, | |
457 | }, | |
458 | { | |
459 | .compatible = "atmel,at91sam9x5-ebi", | |
460 | .data = &at91sam9x5_ebi_caps, | |
461 | }, | |
462 | { | |
463 | .compatible = "atmel,sama5d3-ebi", | |
464 | .data = &sama5d3_ebi_caps, | |
465 | }, | |
466 | { /* sentinel */ } | |
467 | }; | |
6a4ec4cd | 468 | |
9453fa46 | 469 | static int atmel_ebi_dev_disable(struct atmel_ebi *ebi, struct device_node *np) |
6a4ec4cd BB |
470 | { |
471 | struct device *dev = ebi->dev; | |
472 | struct property *newprop; | |
473 | ||
474 | newprop = devm_kzalloc(dev, sizeof(*newprop), GFP_KERNEL); | |
475 | if (!newprop) | |
476 | return -ENOMEM; | |
477 | ||
478 | newprop->name = devm_kstrdup(dev, "status", GFP_KERNEL); | |
479 | if (!newprop->name) | |
480 | return -ENOMEM; | |
481 | ||
482 | newprop->value = devm_kstrdup(dev, "disabled", GFP_KERNEL); | |
ecc2d430 | 483 | if (!newprop->value) |
6a4ec4cd BB |
484 | return -ENOMEM; |
485 | ||
486 | newprop->length = sizeof("disabled"); | |
487 | ||
488 | return of_update_property(np, newprop); | |
489 | } | |
490 | ||
9453fa46 | 491 | static int atmel_ebi_probe(struct platform_device *pdev) |
6a4ec4cd BB |
492 | { |
493 | struct device *dev = &pdev->dev; | |
87108dc7 | 494 | struct device_node *child, *np = dev->of_node, *smc_np; |
6a4ec4cd | 495 | const struct of_device_id *match; |
9453fa46 | 496 | struct atmel_ebi *ebi; |
6a4ec4cd BB |
497 | int ret, reg_cells; |
498 | struct clk *clk; | |
499 | u32 val; | |
500 | ||
9453fa46 | 501 | match = of_match_device(atmel_ebi_id_table, dev); |
6a4ec4cd BB |
502 | if (!match || !match->data) |
503 | return -EINVAL; | |
504 | ||
505 | ebi = devm_kzalloc(dev, sizeof(*ebi), GFP_KERNEL); | |
506 | if (!ebi) | |
507 | return -ENOMEM; | |
508 | ||
4407319d BB |
509 | platform_set_drvdata(pdev, ebi); |
510 | ||
6a4ec4cd BB |
511 | INIT_LIST_HEAD(&ebi->devs); |
512 | ebi->caps = match->data; | |
513 | ebi->dev = dev; | |
514 | ||
515 | clk = devm_clk_get(dev, NULL); | |
516 | if (IS_ERR(clk)) | |
517 | return PTR_ERR(clk); | |
518 | ||
519 | ebi->clk = clk; | |
520 | ||
87108dc7 BB |
521 | smc_np = of_parse_phandle(dev->of_node, "atmel,smc", 0); |
522 | ||
523 | ebi->smc.regmap = syscon_node_to_regmap(smc_np); | |
524 | if (IS_ERR(ebi->smc.regmap)) | |
525 | return PTR_ERR(ebi->smc.regmap); | |
526 | ||
527 | ebi->smc.clk = of_clk_get(smc_np, 0); | |
528 | if (IS_ERR(ebi->smc.clk)) { | |
529 | if (PTR_ERR(ebi->smc.clk) != -ENOENT) | |
530 | return PTR_ERR(ebi->smc.clk); | |
531 | ||
532 | ebi->smc.clk = NULL; | |
533 | } | |
534 | ret = clk_prepare_enable(ebi->smc.clk); | |
535 | if (ret) | |
536 | return ret; | |
6a4ec4cd BB |
537 | |
538 | /* | |
539 | * The sama5d3 does not provide an EBICSA register and thus does need | |
540 | * to access the matrix registers. | |
541 | */ | |
d9f81dad | 542 | if (ebi->caps->ebi_csa_offs) { |
6a4ec4cd BB |
543 | ebi->matrix = |
544 | syscon_regmap_lookup_by_phandle(np, "atmel,matrix"); | |
545 | if (IS_ERR(ebi->matrix)) | |
546 | return PTR_ERR(ebi->matrix); | |
6a4ec4cd BB |
547 | } |
548 | ||
6a4ec4cd BB |
549 | ret = of_property_read_u32(np, "#address-cells", &val); |
550 | if (ret) { | |
551 | dev_err(dev, "missing #address-cells property\n"); | |
552 | return ret; | |
553 | } | |
554 | ||
555 | reg_cells = val; | |
556 | ||
557 | ret = of_property_read_u32(np, "#size-cells", &val); | |
558 | if (ret) { | |
559 | dev_err(dev, "missing #address-cells property\n"); | |
560 | return ret; | |
561 | } | |
562 | ||
563 | reg_cells += val; | |
564 | ||
565 | for_each_available_child_of_node(np, child) { | |
566 | if (!of_find_property(child, "reg", NULL)) | |
567 | continue; | |
568 | ||
9453fa46 | 569 | ret = atmel_ebi_dev_setup(ebi, child, reg_cells); |
6a4ec4cd | 570 | if (ret) { |
db749d17 RH |
571 | dev_err(dev, "failed to configure EBI bus for %pOF, disabling the device", |
572 | child); | |
6a4ec4cd | 573 | |
9453fa46 | 574 | ret = atmel_ebi_dev_disable(ebi, child); |
6a4ec4cd BB |
575 | if (ret) |
576 | return ret; | |
577 | } | |
578 | } | |
579 | ||
580 | return of_platform_populate(np, NULL, NULL, dev); | |
581 | } | |
582 | ||
41b80bb1 | 583 | static __maybe_unused int atmel_ebi_resume(struct device *dev) |
4407319d BB |
584 | { |
585 | struct atmel_ebi *ebi = dev_get_drvdata(dev); | |
586 | struct atmel_ebi_dev *ebid; | |
587 | ||
588 | list_for_each_entry(ebid, &ebi->devs, node) { | |
589 | int i; | |
590 | ||
591 | for (i = 0; i < ebid->numcs; i++) | |
592 | ebid->ebi->caps->apply_config(ebid, &ebid->configs[i]); | |
593 | } | |
594 | ||
595 | return 0; | |
596 | } | |
597 | ||
598 | static SIMPLE_DEV_PM_OPS(atmel_ebi_pm_ops, NULL, atmel_ebi_resume); | |
599 | ||
9453fa46 | 600 | static struct platform_driver atmel_ebi_driver = { |
6a4ec4cd BB |
601 | .driver = { |
602 | .name = "atmel-ebi", | |
9453fa46 | 603 | .of_match_table = atmel_ebi_id_table, |
4407319d | 604 | .pm = &atmel_ebi_pm_ops, |
6a4ec4cd BB |
605 | }, |
606 | }; | |
9453fa46 | 607 | builtin_platform_driver_probe(atmel_ebi_driver, atmel_ebi_probe); |