Commit | Line | Data |
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5db3fb40 | 1 | // SPDX-License-Identifier: GPL-2.0 |
6a4ec4cd BB |
2 | /* |
3 | * EBI driver for Atmel chips | |
4 | * inspired by the fsl weim bus driver | |
5 | * | |
6 | * Copyright (C) 2013 Jean-Jacques Hiblot <jjhiblot@traphandler.com> | |
6a4ec4cd BB |
7 | */ |
8 | ||
9 | #include <linux/clk.h> | |
10 | #include <linux/io.h> | |
11 | #include <linux/mfd/syscon.h> | |
12 | #include <linux/mfd/syscon/atmel-matrix.h> | |
13 | #include <linux/mfd/syscon/atmel-smc.h> | |
8a86a093 | 14 | #include <linux/init.h> |
6a4ec4cd BB |
15 | #include <linux/of_device.h> |
16 | #include <linux/regmap.h> | |
3e0863dd | 17 | #include <soc/at91/atmel-sfr.h> |
6a4ec4cd | 18 | |
dbbf9839 TA |
19 | #define AT91_EBI_NUM_CS 8 |
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; |
ad7bdbc8 | 39 | const char *regmap_name; |
9453fa46 BB |
40 | void (*get_config)(struct atmel_ebi_dev *ebid, |
41 | struct atmel_ebi_dev_config *conf); | |
42 | int (*xlate_config)(struct atmel_ebi_dev *ebid, | |
6a4ec4cd | 43 | struct device_node *configs_np, |
9453fa46 BB |
44 | struct atmel_ebi_dev_config *conf); |
45 | void (*apply_config)(struct atmel_ebi_dev *ebid, | |
46 | struct atmel_ebi_dev_config *conf); | |
6a4ec4cd BB |
47 | }; |
48 | ||
9453fa46 | 49 | struct atmel_ebi { |
6a4ec4cd | 50 | struct clk *clk; |
ad7bdbc8 | 51 | struct regmap *regmap; |
87108dc7 BB |
52 | struct { |
53 | struct regmap *regmap; | |
54 | struct clk *clk; | |
b0f3ab20 | 55 | const struct atmel_hsmc_reg_layout *layout; |
87108dc7 | 56 | } smc; |
6a4ec4cd BB |
57 | |
58 | struct device *dev; | |
9453fa46 | 59 | const struct atmel_ebi_caps *caps; |
6a4ec4cd | 60 | struct list_head devs; |
6a4ec4cd BB |
61 | }; |
62 | ||
8eb8c7d8 BB |
63 | struct atmel_smc_timing_xlate { |
64 | const char *name; | |
65 | int (*converter)(struct atmel_smc_cs_conf *conf, | |
66 | unsigned int shift, unsigned int nycles); | |
67 | unsigned int shift; | |
68 | }; | |
69 | ||
70 | #define ATMEL_SMC_SETUP_XLATE(nm, pos) \ | |
71 | { .name = nm, .converter = atmel_smc_cs_conf_set_setup, .shift = pos} | |
72 | ||
73 | #define ATMEL_SMC_PULSE_XLATE(nm, pos) \ | |
74 | { .name = nm, .converter = atmel_smc_cs_conf_set_pulse, .shift = pos} | |
75 | ||
76 | #define ATMEL_SMC_CYCLE_XLATE(nm, pos) \ | |
3fb3b3c4 | 77 | { .name = nm, .converter = atmel_smc_cs_conf_set_cycle, .shift = pos} |
8eb8c7d8 | 78 | |
9453fa46 BB |
79 | static void at91sam9_ebi_get_config(struct atmel_ebi_dev *ebid, |
80 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 81 | { |
8eb8c7d8 BB |
82 | atmel_smc_cs_conf_get(ebid->ebi->smc.regmap, conf->cs, |
83 | &conf->smcconf); | |
6a4ec4cd BB |
84 | } |
85 | ||
9453fa46 BB |
86 | static void sama5_ebi_get_config(struct atmel_ebi_dev *ebid, |
87 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 88 | { |
b0f3ab20 LD |
89 | atmel_hsmc_cs_conf_get(ebid->ebi->smc.regmap, ebid->ebi->smc.layout, |
90 | conf->cs, &conf->smcconf); | |
6a4ec4cd BB |
91 | } |
92 | ||
8eb8c7d8 BB |
93 | static const struct atmel_smc_timing_xlate timings_xlate_table[] = { |
94 | ATMEL_SMC_SETUP_XLATE("atmel,smc-ncs-rd-setup-ns", | |
95 | ATMEL_SMC_NCS_RD_SHIFT), | |
96 | ATMEL_SMC_SETUP_XLATE("atmel,smc-ncs-wr-setup-ns", | |
97 | ATMEL_SMC_NCS_WR_SHIFT), | |
98 | ATMEL_SMC_SETUP_XLATE("atmel,smc-nrd-setup-ns", ATMEL_SMC_NRD_SHIFT), | |
99 | ATMEL_SMC_SETUP_XLATE("atmel,smc-nwe-setup-ns", ATMEL_SMC_NWE_SHIFT), | |
100 | ATMEL_SMC_PULSE_XLATE("atmel,smc-ncs-rd-pulse-ns", | |
101 | ATMEL_SMC_NCS_RD_SHIFT), | |
102 | ATMEL_SMC_PULSE_XLATE("atmel,smc-ncs-wr-pulse-ns", | |
103 | ATMEL_SMC_NCS_WR_SHIFT), | |
104 | ATMEL_SMC_PULSE_XLATE("atmel,smc-nrd-pulse-ns", ATMEL_SMC_NRD_SHIFT), | |
105 | ATMEL_SMC_PULSE_XLATE("atmel,smc-nwe-pulse-ns", ATMEL_SMC_NWE_SHIFT), | |
106 | ATMEL_SMC_CYCLE_XLATE("atmel,smc-nrd-cycle-ns", ATMEL_SMC_NRD_SHIFT), | |
107 | ATMEL_SMC_CYCLE_XLATE("atmel,smc-nwe-cycle-ns", ATMEL_SMC_NWE_SHIFT), | |
108 | }; | |
109 | ||
9453fa46 BB |
110 | static int atmel_ebi_xslate_smc_timings(struct atmel_ebi_dev *ebid, |
111 | struct device_node *np, | |
112 | struct atmel_smc_cs_conf *smcconf) | |
6a4ec4cd | 113 | { |
8eb8c7d8 BB |
114 | unsigned int clk_rate = clk_get_rate(ebid->ebi->clk); |
115 | unsigned int clk_period_ns = NSEC_PER_SEC / clk_rate; | |
116 | bool required = false; | |
117 | unsigned int ncycles; | |
118 | int ret, i; | |
119 | u32 val; | |
6a4ec4cd | 120 | |
8eb8c7d8 BB |
121 | ret = of_property_read_u32(np, "atmel,smc-tdf-ns", &val); |
122 | if (!ret) { | |
123 | required = true; | |
124 | ncycles = DIV_ROUND_UP(val, clk_period_ns); | |
1f6b5390 | 125 | if (ncycles > ATMEL_SMC_MODE_TDF_MAX) { |
8eb8c7d8 BB |
126 | ret = -EINVAL; |
127 | goto out; | |
128 | } | |
6a4ec4cd | 129 | |
1f6b5390 AD |
130 | if (ncycles < ATMEL_SMC_MODE_TDF_MIN) |
131 | ncycles = ATMEL_SMC_MODE_TDF_MIN; | |
132 | ||
8eb8c7d8 BB |
133 | smcconf->mode |= ATMEL_SMC_MODE_TDF(ncycles); |
134 | } | |
6a4ec4cd | 135 | |
8eb8c7d8 BB |
136 | for (i = 0; i < ARRAY_SIZE(timings_xlate_table); i++) { |
137 | const struct atmel_smc_timing_xlate *xlate; | |
6a4ec4cd | 138 | |
8eb8c7d8 | 139 | xlate = &timings_xlate_table[i]; |
6a4ec4cd | 140 | |
8eb8c7d8 BB |
141 | ret = of_property_read_u32(np, xlate->name, &val); |
142 | if (ret) { | |
143 | if (!required) | |
144 | continue; | |
145 | else | |
146 | break; | |
147 | } | |
6a4ec4cd | 148 | |
8eb8c7d8 BB |
149 | if (!required) { |
150 | ret = -EINVAL; | |
151 | break; | |
152 | } | |
6a4ec4cd | 153 | |
8eb8c7d8 BB |
154 | ncycles = DIV_ROUND_UP(val, clk_period_ns); |
155 | ret = xlate->converter(smcconf, xlate->shift, ncycles); | |
156 | if (ret) | |
157 | goto out; | |
158 | } | |
6a4ec4cd BB |
159 | |
160 | out: | |
8eb8c7d8 | 161 | if (ret) { |
6a4ec4cd | 162 | dev_err(ebid->ebi->dev, |
db749d17 RH |
163 | "missing or invalid timings definition in %pOF", |
164 | np); | |
8eb8c7d8 BB |
165 | return ret; |
166 | } | |
6a4ec4cd | 167 | |
8eb8c7d8 | 168 | return required; |
6a4ec4cd BB |
169 | } |
170 | ||
9453fa46 BB |
171 | static int atmel_ebi_xslate_smc_config(struct atmel_ebi_dev *ebid, |
172 | struct device_node *np, | |
173 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 174 | { |
8eb8c7d8 | 175 | struct atmel_smc_cs_conf *smcconf = &conf->smcconf; |
6a4ec4cd BB |
176 | bool required = false; |
177 | const char *tmp_str; | |
178 | u32 tmp; | |
179 | int ret; | |
180 | ||
181 | ret = of_property_read_u32(np, "atmel,smc-bus-width", &tmp); | |
182 | if (!ret) { | |
183 | switch (tmp) { | |
184 | case 8: | |
8eb8c7d8 | 185 | smcconf->mode |= ATMEL_SMC_MODE_DBW_8; |
6a4ec4cd BB |
186 | break; |
187 | ||
188 | case 16: | |
8eb8c7d8 | 189 | smcconf->mode |= ATMEL_SMC_MODE_DBW_16; |
6a4ec4cd BB |
190 | break; |
191 | ||
192 | case 32: | |
8eb8c7d8 | 193 | smcconf->mode |= ATMEL_SMC_MODE_DBW_32; |
6a4ec4cd BB |
194 | break; |
195 | ||
196 | default: | |
197 | return -EINVAL; | |
198 | } | |
199 | ||
200 | required = true; | |
201 | } | |
202 | ||
203 | if (of_property_read_bool(np, "atmel,smc-tdf-optimized")) { | |
8eb8c7d8 | 204 | smcconf->mode |= ATMEL_SMC_MODE_TDFMODE_OPTIMIZED; |
6a4ec4cd BB |
205 | required = true; |
206 | } | |
207 | ||
208 | tmp_str = NULL; | |
209 | of_property_read_string(np, "atmel,smc-byte-access-type", &tmp_str); | |
210 | if (tmp_str && !strcmp(tmp_str, "write")) { | |
8eb8c7d8 | 211 | smcconf->mode |= ATMEL_SMC_MODE_BAT_WRITE; |
6a4ec4cd BB |
212 | required = true; |
213 | } | |
214 | ||
215 | tmp_str = NULL; | |
216 | of_property_read_string(np, "atmel,smc-read-mode", &tmp_str); | |
217 | if (tmp_str && !strcmp(tmp_str, "nrd")) { | |
8eb8c7d8 | 218 | smcconf->mode |= ATMEL_SMC_MODE_READMODE_NRD; |
6a4ec4cd BB |
219 | required = true; |
220 | } | |
221 | ||
222 | tmp_str = NULL; | |
223 | of_property_read_string(np, "atmel,smc-write-mode", &tmp_str); | |
224 | if (tmp_str && !strcmp(tmp_str, "nwe")) { | |
8eb8c7d8 | 225 | smcconf->mode |= ATMEL_SMC_MODE_WRITEMODE_NWE; |
6a4ec4cd BB |
226 | required = true; |
227 | } | |
228 | ||
229 | tmp_str = NULL; | |
230 | of_property_read_string(np, "atmel,smc-exnw-mode", &tmp_str); | |
231 | if (tmp_str) { | |
232 | if (!strcmp(tmp_str, "frozen")) | |
8eb8c7d8 | 233 | smcconf->mode |= ATMEL_SMC_MODE_EXNWMODE_FROZEN; |
6a4ec4cd | 234 | else if (!strcmp(tmp_str, "ready")) |
8eb8c7d8 | 235 | smcconf->mode |= ATMEL_SMC_MODE_EXNWMODE_READY; |
6a4ec4cd BB |
236 | else if (strcmp(tmp_str, "disabled")) |
237 | return -EINVAL; | |
238 | ||
239 | required = true; | |
240 | } | |
241 | ||
242 | ret = of_property_read_u32(np, "atmel,smc-page-mode", &tmp); | |
243 | if (!ret) { | |
244 | switch (tmp) { | |
245 | case 4: | |
8eb8c7d8 | 246 | smcconf->mode |= ATMEL_SMC_MODE_PS_4; |
6a4ec4cd BB |
247 | break; |
248 | ||
249 | case 8: | |
8eb8c7d8 | 250 | smcconf->mode |= ATMEL_SMC_MODE_PS_8; |
6a4ec4cd BB |
251 | break; |
252 | ||
253 | case 16: | |
8eb8c7d8 | 254 | smcconf->mode |= ATMEL_SMC_MODE_PS_16; |
6a4ec4cd BB |
255 | break; |
256 | ||
257 | case 32: | |
8eb8c7d8 | 258 | smcconf->mode |= ATMEL_SMC_MODE_PS_32; |
6a4ec4cd BB |
259 | break; |
260 | ||
261 | default: | |
262 | return -EINVAL; | |
263 | } | |
264 | ||
8eb8c7d8 | 265 | smcconf->mode |= ATMEL_SMC_MODE_PMEN; |
6a4ec4cd BB |
266 | required = true; |
267 | } | |
268 | ||
9453fa46 | 269 | ret = atmel_ebi_xslate_smc_timings(ebid, np, &conf->smcconf); |
bc9b934b | 270 | if (ret < 0) |
8eb8c7d8 | 271 | return -EINVAL; |
6a4ec4cd | 272 | |
8eb8c7d8 | 273 | if ((ret > 0 && !required) || (!ret && required)) { |
db749d17 RH |
274 | dev_err(ebid->ebi->dev, "missing atmel,smc- properties in %pOF", |
275 | np); | |
8eb8c7d8 BB |
276 | return -EINVAL; |
277 | } | |
6a4ec4cd | 278 | |
8eb8c7d8 | 279 | return required; |
6a4ec4cd BB |
280 | } |
281 | ||
9453fa46 BB |
282 | static void at91sam9_ebi_apply_config(struct atmel_ebi_dev *ebid, |
283 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 284 | { |
8eb8c7d8 BB |
285 | atmel_smc_cs_conf_apply(ebid->ebi->smc.regmap, conf->cs, |
286 | &conf->smcconf); | |
6a4ec4cd BB |
287 | } |
288 | ||
9453fa46 BB |
289 | static void sama5_ebi_apply_config(struct atmel_ebi_dev *ebid, |
290 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 291 | { |
b0f3ab20 LD |
292 | atmel_hsmc_cs_conf_apply(ebid->ebi->smc.regmap, ebid->ebi->smc.layout, |
293 | conf->cs, &conf->smcconf); | |
6a4ec4cd BB |
294 | } |
295 | ||
9453fa46 BB |
296 | static int atmel_ebi_dev_setup(struct atmel_ebi *ebi, struct device_node *np, |
297 | int reg_cells) | |
6a4ec4cd | 298 | { |
9453fa46 BB |
299 | const struct atmel_ebi_caps *caps = ebi->caps; |
300 | struct atmel_ebi_dev_config conf = { }; | |
6a4ec4cd | 301 | struct device *dev = ebi->dev; |
9453fa46 | 302 | struct atmel_ebi_dev *ebid; |
987e079e BB |
303 | unsigned long cslines = 0; |
304 | int ret, numcs = 0, nentries, i; | |
6a4ec4cd | 305 | bool apply = false; |
987e079e | 306 | u32 cs; |
6a4ec4cd | 307 | |
987e079e BB |
308 | nentries = of_property_count_elems_of_size(np, "reg", |
309 | reg_cells * sizeof(u32)); | |
310 | for (i = 0; i < nentries; i++) { | |
311 | ret = of_property_read_u32_index(np, "reg", i * reg_cells, | |
312 | &cs); | |
313 | if (ret) | |
314 | return ret; | |
315 | ||
dbbf9839 | 316 | if (cs >= AT91_EBI_NUM_CS || |
987e079e | 317 | !(ebi->caps->available_cs & BIT(cs))) { |
db749d17 | 318 | dev_err(dev, "invalid reg property in %pOF\n", np); |
987e079e BB |
319 | return -EINVAL; |
320 | } | |
321 | ||
322 | if (!test_and_set_bit(cs, &cslines)) | |
323 | numcs++; | |
324 | } | |
325 | ||
326 | if (!numcs) { | |
db749d17 | 327 | dev_err(dev, "invalid reg property in %pOF\n", np); |
6a4ec4cd BB |
328 | return -EINVAL; |
329 | } | |
330 | ||
f62df676 | 331 | ebid = devm_kzalloc(ebi->dev, struct_size(ebid, configs, numcs), |
6a4ec4cd BB |
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 | 345 | i = 0; |
dbbf9839 | 346 | for_each_set_bit(cs, &cslines, AT91_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 | 360 | if (ebi->caps->ebi_csa_offs && apply) |
ad7bdbc8 | 361 | regmap_update_bits(ebi->regmap, |
d9f81dad BB |
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, |
ad7bdbc8 | 376 | .regmap_name = "atmel,matrix", |
6a4ec4cd | 377 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 378 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 379 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
380 | }; |
381 | ||
9453fa46 | 382 | static const struct atmel_ebi_caps at91sam9261_ebi_caps = { |
6a4ec4cd | 383 | .available_cs = 0xff, |
d9f81dad | 384 | .ebi_csa_offs = AT91SAM9261_MATRIX_EBICSA, |
ad7bdbc8 | 385 | .regmap_name = "atmel,matrix", |
6a4ec4cd | 386 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 387 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 388 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
389 | }; |
390 | ||
9453fa46 | 391 | static const struct atmel_ebi_caps at91sam9263_ebi0_caps = { |
6a4ec4cd | 392 | .available_cs = 0x3f, |
d9f81dad | 393 | .ebi_csa_offs = AT91SAM9263_MATRIX_EBI0CSA, |
ad7bdbc8 | 394 | .regmap_name = "atmel,matrix", |
6a4ec4cd | 395 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 396 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 397 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
398 | }; |
399 | ||
9453fa46 | 400 | static const struct atmel_ebi_caps at91sam9263_ebi1_caps = { |
6a4ec4cd | 401 | .available_cs = 0x7, |
d9f81dad | 402 | .ebi_csa_offs = AT91SAM9263_MATRIX_EBI1CSA, |
ad7bdbc8 | 403 | .regmap_name = "atmel,matrix", |
6a4ec4cd | 404 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 405 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 406 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
407 | }; |
408 | ||
9453fa46 | 409 | static const struct atmel_ebi_caps at91sam9rl_ebi_caps = { |
6a4ec4cd | 410 | .available_cs = 0x3f, |
d9f81dad | 411 | .ebi_csa_offs = AT91SAM9RL_MATRIX_EBICSA, |
ad7bdbc8 | 412 | .regmap_name = "atmel,matrix", |
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 at91sam9g45_ebi_caps = { |
6a4ec4cd | 419 | .available_cs = 0x3f, |
d9f81dad | 420 | .ebi_csa_offs = AT91SAM9G45_MATRIX_EBICSA, |
ad7bdbc8 | 421 | .regmap_name = "atmel,matrix", |
6a4ec4cd | 422 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 423 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 424 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
425 | }; |
426 | ||
9453fa46 | 427 | static const struct atmel_ebi_caps at91sam9x5_ebi_caps = { |
6a4ec4cd | 428 | .available_cs = 0x3f, |
d9f81dad | 429 | .ebi_csa_offs = AT91SAM9X5_MATRIX_EBICSA, |
ad7bdbc8 | 430 | .regmap_name = "atmel,matrix", |
6a4ec4cd | 431 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 432 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 433 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
434 | }; |
435 | ||
9453fa46 | 436 | static const struct atmel_ebi_caps sama5d3_ebi_caps = { |
6a4ec4cd | 437 | .available_cs = 0xf, |
8eb8c7d8 | 438 | .get_config = sama5_ebi_get_config, |
9453fa46 | 439 | .xlate_config = atmel_ebi_xslate_smc_config, |
8eb8c7d8 | 440 | .apply_config = sama5_ebi_apply_config, |
6a4ec4cd BB |
441 | }; |
442 | ||
3e0863dd TA |
443 | static const struct atmel_ebi_caps sam9x60_ebi_caps = { |
444 | .available_cs = 0x3f, | |
445 | .ebi_csa_offs = AT91_SFR_CCFG_EBICSA, | |
446 | .regmap_name = "microchip,sfr", | |
447 | .get_config = at91sam9_ebi_get_config, | |
448 | .xlate_config = atmel_ebi_xslate_smc_config, | |
449 | .apply_config = at91sam9_ebi_apply_config, | |
450 | }; | |
451 | ||
9453fa46 | 452 | static const struct of_device_id atmel_ebi_id_table[] = { |
6a4ec4cd BB |
453 | { |
454 | .compatible = "atmel,at91sam9260-ebi", | |
455 | .data = &at91sam9260_ebi_caps, | |
456 | }, | |
457 | { | |
458 | .compatible = "atmel,at91sam9261-ebi", | |
459 | .data = &at91sam9261_ebi_caps, | |
460 | }, | |
461 | { | |
462 | .compatible = "atmel,at91sam9263-ebi0", | |
463 | .data = &at91sam9263_ebi0_caps, | |
464 | }, | |
465 | { | |
466 | .compatible = "atmel,at91sam9263-ebi1", | |
467 | .data = &at91sam9263_ebi1_caps, | |
468 | }, | |
469 | { | |
470 | .compatible = "atmel,at91sam9rl-ebi", | |
471 | .data = &at91sam9rl_ebi_caps, | |
472 | }, | |
473 | { | |
474 | .compatible = "atmel,at91sam9g45-ebi", | |
475 | .data = &at91sam9g45_ebi_caps, | |
476 | }, | |
477 | { | |
478 | .compatible = "atmel,at91sam9x5-ebi", | |
479 | .data = &at91sam9x5_ebi_caps, | |
480 | }, | |
481 | { | |
482 | .compatible = "atmel,sama5d3-ebi", | |
483 | .data = &sama5d3_ebi_caps, | |
484 | }, | |
3e0863dd TA |
485 | { |
486 | .compatible = "microchip,sam9x60-ebi", | |
487 | .data = &sam9x60_ebi_caps, | |
488 | }, | |
6a4ec4cd BB |
489 | { /* sentinel */ } |
490 | }; | |
6a4ec4cd | 491 | |
9453fa46 | 492 | static int atmel_ebi_dev_disable(struct atmel_ebi *ebi, struct device_node *np) |
6a4ec4cd BB |
493 | { |
494 | struct device *dev = ebi->dev; | |
495 | struct property *newprop; | |
496 | ||
497 | newprop = devm_kzalloc(dev, sizeof(*newprop), GFP_KERNEL); | |
498 | if (!newprop) | |
499 | return -ENOMEM; | |
500 | ||
501 | newprop->name = devm_kstrdup(dev, "status", GFP_KERNEL); | |
502 | if (!newprop->name) | |
503 | return -ENOMEM; | |
504 | ||
505 | newprop->value = devm_kstrdup(dev, "disabled", GFP_KERNEL); | |
ecc2d430 | 506 | if (!newprop->value) |
6a4ec4cd BB |
507 | return -ENOMEM; |
508 | ||
509 | newprop->length = sizeof("disabled"); | |
510 | ||
511 | return of_update_property(np, newprop); | |
512 | } | |
513 | ||
9453fa46 | 514 | static int atmel_ebi_probe(struct platform_device *pdev) |
6a4ec4cd BB |
515 | { |
516 | struct device *dev = &pdev->dev; | |
87108dc7 | 517 | struct device_node *child, *np = dev->of_node, *smc_np; |
6a4ec4cd | 518 | const struct of_device_id *match; |
9453fa46 | 519 | struct atmel_ebi *ebi; |
6a4ec4cd BB |
520 | int ret, reg_cells; |
521 | struct clk *clk; | |
522 | u32 val; | |
523 | ||
9453fa46 | 524 | match = of_match_device(atmel_ebi_id_table, dev); |
6a4ec4cd BB |
525 | if (!match || !match->data) |
526 | return -EINVAL; | |
527 | ||
528 | ebi = devm_kzalloc(dev, sizeof(*ebi), GFP_KERNEL); | |
529 | if (!ebi) | |
530 | return -ENOMEM; | |
531 | ||
4407319d BB |
532 | platform_set_drvdata(pdev, ebi); |
533 | ||
6a4ec4cd BB |
534 | INIT_LIST_HEAD(&ebi->devs); |
535 | ebi->caps = match->data; | |
536 | ebi->dev = dev; | |
537 | ||
538 | clk = devm_clk_get(dev, NULL); | |
539 | if (IS_ERR(clk)) | |
540 | return PTR_ERR(clk); | |
541 | ||
542 | ebi->clk = clk; | |
543 | ||
87108dc7 BB |
544 | smc_np = of_parse_phandle(dev->of_node, "atmel,smc", 0); |
545 | ||
546 | ebi->smc.regmap = syscon_node_to_regmap(smc_np); | |
547 | if (IS_ERR(ebi->smc.regmap)) | |
548 | return PTR_ERR(ebi->smc.regmap); | |
549 | ||
b0f3ab20 LD |
550 | ebi->smc.layout = atmel_hsmc_get_reg_layout(smc_np); |
551 | if (IS_ERR(ebi->smc.layout)) | |
552 | return PTR_ERR(ebi->smc.layout); | |
553 | ||
87108dc7 BB |
554 | ebi->smc.clk = of_clk_get(smc_np, 0); |
555 | if (IS_ERR(ebi->smc.clk)) { | |
556 | if (PTR_ERR(ebi->smc.clk) != -ENOENT) | |
557 | return PTR_ERR(ebi->smc.clk); | |
558 | ||
559 | ebi->smc.clk = NULL; | |
560 | } | |
561 | ret = clk_prepare_enable(ebi->smc.clk); | |
562 | if (ret) | |
563 | return ret; | |
6a4ec4cd BB |
564 | |
565 | /* | |
566 | * The sama5d3 does not provide an EBICSA register and thus does need | |
ad7bdbc8 | 567 | * to access it. |
6a4ec4cd | 568 | */ |
d9f81dad | 569 | if (ebi->caps->ebi_csa_offs) { |
ad7bdbc8 TA |
570 | ebi->regmap = |
571 | syscon_regmap_lookup_by_phandle(np, | |
572 | ebi->caps->regmap_name); | |
573 | if (IS_ERR(ebi->regmap)) | |
574 | return PTR_ERR(ebi->regmap); | |
6a4ec4cd BB |
575 | } |
576 | ||
6a4ec4cd BB |
577 | ret = of_property_read_u32(np, "#address-cells", &val); |
578 | if (ret) { | |
579 | dev_err(dev, "missing #address-cells property\n"); | |
580 | return ret; | |
581 | } | |
582 | ||
583 | reg_cells = val; | |
584 | ||
585 | ret = of_property_read_u32(np, "#size-cells", &val); | |
586 | if (ret) { | |
587 | dev_err(dev, "missing #address-cells property\n"); | |
588 | return ret; | |
589 | } | |
590 | ||
591 | reg_cells += val; | |
592 | ||
593 | for_each_available_child_of_node(np, child) { | |
594 | if (!of_find_property(child, "reg", NULL)) | |
595 | continue; | |
596 | ||
9453fa46 | 597 | ret = atmel_ebi_dev_setup(ebi, child, reg_cells); |
6a4ec4cd | 598 | if (ret) { |
db749d17 RH |
599 | dev_err(dev, "failed to configure EBI bus for %pOF, disabling the device", |
600 | child); | |
6a4ec4cd | 601 | |
9453fa46 | 602 | ret = atmel_ebi_dev_disable(ebi, child); |
6a4ec4cd BB |
603 | if (ret) |
604 | return ret; | |
605 | } | |
606 | } | |
607 | ||
608 | return of_platform_populate(np, NULL, NULL, dev); | |
609 | } | |
610 | ||
41b80bb1 | 611 | static __maybe_unused int atmel_ebi_resume(struct device *dev) |
4407319d BB |
612 | { |
613 | struct atmel_ebi *ebi = dev_get_drvdata(dev); | |
614 | struct atmel_ebi_dev *ebid; | |
615 | ||
616 | list_for_each_entry(ebid, &ebi->devs, node) { | |
617 | int i; | |
618 | ||
619 | for (i = 0; i < ebid->numcs; i++) | |
620 | ebid->ebi->caps->apply_config(ebid, &ebid->configs[i]); | |
621 | } | |
622 | ||
623 | return 0; | |
624 | } | |
625 | ||
626 | static SIMPLE_DEV_PM_OPS(atmel_ebi_pm_ops, NULL, atmel_ebi_resume); | |
627 | ||
9453fa46 | 628 | static struct platform_driver atmel_ebi_driver = { |
6a4ec4cd BB |
629 | .driver = { |
630 | .name = "atmel-ebi", | |
9453fa46 | 631 | .of_match_table = atmel_ebi_id_table, |
4407319d | 632 | .pm = &atmel_ebi_pm_ops, |
6a4ec4cd BB |
633 | }, |
634 | }; | |
9453fa46 | 635 | builtin_platform_driver_probe(atmel_ebi_driver, atmel_ebi_probe); |