Commit | Line | Data |
---|---|---|
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; | |
b0f3ab20 | 54 | const struct atmel_hsmc_reg_layout *layout; |
87108dc7 | 55 | } smc; |
6a4ec4cd BB |
56 | |
57 | struct device *dev; | |
9453fa46 | 58 | const struct atmel_ebi_caps *caps; |
6a4ec4cd | 59 | struct list_head devs; |
6a4ec4cd BB |
60 | }; |
61 | ||
8eb8c7d8 BB |
62 | struct atmel_smc_timing_xlate { |
63 | const char *name; | |
64 | int (*converter)(struct atmel_smc_cs_conf *conf, | |
65 | unsigned int shift, unsigned int nycles); | |
66 | unsigned int shift; | |
67 | }; | |
68 | ||
69 | #define ATMEL_SMC_SETUP_XLATE(nm, pos) \ | |
70 | { .name = nm, .converter = atmel_smc_cs_conf_set_setup, .shift = pos} | |
71 | ||
72 | #define ATMEL_SMC_PULSE_XLATE(nm, pos) \ | |
73 | { .name = nm, .converter = atmel_smc_cs_conf_set_pulse, .shift = pos} | |
74 | ||
75 | #define ATMEL_SMC_CYCLE_XLATE(nm, pos) \ | |
3fb3b3c4 | 76 | { .name = nm, .converter = atmel_smc_cs_conf_set_cycle, .shift = pos} |
8eb8c7d8 | 77 | |
9453fa46 BB |
78 | static void at91sam9_ebi_get_config(struct atmel_ebi_dev *ebid, |
79 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 80 | { |
8eb8c7d8 BB |
81 | atmel_smc_cs_conf_get(ebid->ebi->smc.regmap, conf->cs, |
82 | &conf->smcconf); | |
6a4ec4cd BB |
83 | } |
84 | ||
9453fa46 BB |
85 | static void sama5_ebi_get_config(struct atmel_ebi_dev *ebid, |
86 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 87 | { |
b0f3ab20 LD |
88 | atmel_hsmc_cs_conf_get(ebid->ebi->smc.regmap, ebid->ebi->smc.layout, |
89 | conf->cs, &conf->smcconf); | |
6a4ec4cd BB |
90 | } |
91 | ||
8eb8c7d8 BB |
92 | static const struct atmel_smc_timing_xlate timings_xlate_table[] = { |
93 | ATMEL_SMC_SETUP_XLATE("atmel,smc-ncs-rd-setup-ns", | |
94 | ATMEL_SMC_NCS_RD_SHIFT), | |
95 | ATMEL_SMC_SETUP_XLATE("atmel,smc-ncs-wr-setup-ns", | |
96 | ATMEL_SMC_NCS_WR_SHIFT), | |
97 | ATMEL_SMC_SETUP_XLATE("atmel,smc-nrd-setup-ns", ATMEL_SMC_NRD_SHIFT), | |
98 | ATMEL_SMC_SETUP_XLATE("atmel,smc-nwe-setup-ns", ATMEL_SMC_NWE_SHIFT), | |
99 | ATMEL_SMC_PULSE_XLATE("atmel,smc-ncs-rd-pulse-ns", | |
100 | ATMEL_SMC_NCS_RD_SHIFT), | |
101 | ATMEL_SMC_PULSE_XLATE("atmel,smc-ncs-wr-pulse-ns", | |
102 | ATMEL_SMC_NCS_WR_SHIFT), | |
103 | ATMEL_SMC_PULSE_XLATE("atmel,smc-nrd-pulse-ns", ATMEL_SMC_NRD_SHIFT), | |
104 | ATMEL_SMC_PULSE_XLATE("atmel,smc-nwe-pulse-ns", ATMEL_SMC_NWE_SHIFT), | |
105 | ATMEL_SMC_CYCLE_XLATE("atmel,smc-nrd-cycle-ns", ATMEL_SMC_NRD_SHIFT), | |
106 | ATMEL_SMC_CYCLE_XLATE("atmel,smc-nwe-cycle-ns", ATMEL_SMC_NWE_SHIFT), | |
107 | }; | |
108 | ||
9453fa46 BB |
109 | static int atmel_ebi_xslate_smc_timings(struct atmel_ebi_dev *ebid, |
110 | struct device_node *np, | |
111 | struct atmel_smc_cs_conf *smcconf) | |
6a4ec4cd | 112 | { |
8eb8c7d8 BB |
113 | unsigned int clk_rate = clk_get_rate(ebid->ebi->clk); |
114 | unsigned int clk_period_ns = NSEC_PER_SEC / clk_rate; | |
115 | bool required = false; | |
116 | unsigned int ncycles; | |
117 | int ret, i; | |
118 | u32 val; | |
6a4ec4cd | 119 | |
8eb8c7d8 BB |
120 | ret = of_property_read_u32(np, "atmel,smc-tdf-ns", &val); |
121 | if (!ret) { | |
122 | required = true; | |
123 | ncycles = DIV_ROUND_UP(val, clk_period_ns); | |
1f6b5390 | 124 | if (ncycles > ATMEL_SMC_MODE_TDF_MAX) { |
8eb8c7d8 BB |
125 | ret = -EINVAL; |
126 | goto out; | |
127 | } | |
6a4ec4cd | 128 | |
1f6b5390 AD |
129 | if (ncycles < ATMEL_SMC_MODE_TDF_MIN) |
130 | ncycles = ATMEL_SMC_MODE_TDF_MIN; | |
131 | ||
8eb8c7d8 BB |
132 | smcconf->mode |= ATMEL_SMC_MODE_TDF(ncycles); |
133 | } | |
6a4ec4cd | 134 | |
8eb8c7d8 BB |
135 | for (i = 0; i < ARRAY_SIZE(timings_xlate_table); i++) { |
136 | const struct atmel_smc_timing_xlate *xlate; | |
6a4ec4cd | 137 | |
8eb8c7d8 | 138 | xlate = &timings_xlate_table[i]; |
6a4ec4cd | 139 | |
8eb8c7d8 BB |
140 | ret = of_property_read_u32(np, xlate->name, &val); |
141 | if (ret) { | |
142 | if (!required) | |
143 | continue; | |
144 | else | |
145 | break; | |
146 | } | |
6a4ec4cd | 147 | |
8eb8c7d8 BB |
148 | if (!required) { |
149 | ret = -EINVAL; | |
150 | break; | |
151 | } | |
6a4ec4cd | 152 | |
8eb8c7d8 BB |
153 | ncycles = DIV_ROUND_UP(val, clk_period_ns); |
154 | ret = xlate->converter(smcconf, xlate->shift, ncycles); | |
155 | if (ret) | |
156 | goto out; | |
157 | } | |
6a4ec4cd BB |
158 | |
159 | out: | |
8eb8c7d8 | 160 | if (ret) { |
6a4ec4cd | 161 | dev_err(ebid->ebi->dev, |
db749d17 RH |
162 | "missing or invalid timings definition in %pOF", |
163 | np); | |
8eb8c7d8 BB |
164 | return ret; |
165 | } | |
6a4ec4cd | 166 | |
8eb8c7d8 | 167 | return required; |
6a4ec4cd BB |
168 | } |
169 | ||
9453fa46 BB |
170 | static int atmel_ebi_xslate_smc_config(struct atmel_ebi_dev *ebid, |
171 | struct device_node *np, | |
172 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 173 | { |
8eb8c7d8 | 174 | struct atmel_smc_cs_conf *smcconf = &conf->smcconf; |
6a4ec4cd BB |
175 | bool required = false; |
176 | const char *tmp_str; | |
177 | u32 tmp; | |
178 | int ret; | |
179 | ||
180 | ret = of_property_read_u32(np, "atmel,smc-bus-width", &tmp); | |
181 | if (!ret) { | |
182 | switch (tmp) { | |
183 | case 8: | |
8eb8c7d8 | 184 | smcconf->mode |= ATMEL_SMC_MODE_DBW_8; |
6a4ec4cd BB |
185 | break; |
186 | ||
187 | case 16: | |
8eb8c7d8 | 188 | smcconf->mode |= ATMEL_SMC_MODE_DBW_16; |
6a4ec4cd BB |
189 | break; |
190 | ||
191 | case 32: | |
8eb8c7d8 | 192 | smcconf->mode |= ATMEL_SMC_MODE_DBW_32; |
6a4ec4cd BB |
193 | break; |
194 | ||
195 | default: | |
196 | return -EINVAL; | |
197 | } | |
198 | ||
199 | required = true; | |
200 | } | |
201 | ||
202 | if (of_property_read_bool(np, "atmel,smc-tdf-optimized")) { | |
8eb8c7d8 | 203 | smcconf->mode |= ATMEL_SMC_MODE_TDFMODE_OPTIMIZED; |
6a4ec4cd BB |
204 | required = true; |
205 | } | |
206 | ||
207 | tmp_str = NULL; | |
208 | of_property_read_string(np, "atmel,smc-byte-access-type", &tmp_str); | |
209 | if (tmp_str && !strcmp(tmp_str, "write")) { | |
8eb8c7d8 | 210 | smcconf->mode |= ATMEL_SMC_MODE_BAT_WRITE; |
6a4ec4cd BB |
211 | required = true; |
212 | } | |
213 | ||
214 | tmp_str = NULL; | |
215 | of_property_read_string(np, "atmel,smc-read-mode", &tmp_str); | |
216 | if (tmp_str && !strcmp(tmp_str, "nrd")) { | |
8eb8c7d8 | 217 | smcconf->mode |= ATMEL_SMC_MODE_READMODE_NRD; |
6a4ec4cd BB |
218 | required = true; |
219 | } | |
220 | ||
221 | tmp_str = NULL; | |
222 | of_property_read_string(np, "atmel,smc-write-mode", &tmp_str); | |
223 | if (tmp_str && !strcmp(tmp_str, "nwe")) { | |
8eb8c7d8 | 224 | smcconf->mode |= ATMEL_SMC_MODE_WRITEMODE_NWE; |
6a4ec4cd BB |
225 | required = true; |
226 | } | |
227 | ||
228 | tmp_str = NULL; | |
229 | of_property_read_string(np, "atmel,smc-exnw-mode", &tmp_str); | |
230 | if (tmp_str) { | |
231 | if (!strcmp(tmp_str, "frozen")) | |
8eb8c7d8 | 232 | smcconf->mode |= ATMEL_SMC_MODE_EXNWMODE_FROZEN; |
6a4ec4cd | 233 | else if (!strcmp(tmp_str, "ready")) |
8eb8c7d8 | 234 | smcconf->mode |= ATMEL_SMC_MODE_EXNWMODE_READY; |
6a4ec4cd BB |
235 | else if (strcmp(tmp_str, "disabled")) |
236 | return -EINVAL; | |
237 | ||
238 | required = true; | |
239 | } | |
240 | ||
241 | ret = of_property_read_u32(np, "atmel,smc-page-mode", &tmp); | |
242 | if (!ret) { | |
243 | switch (tmp) { | |
244 | case 4: | |
8eb8c7d8 | 245 | smcconf->mode |= ATMEL_SMC_MODE_PS_4; |
6a4ec4cd BB |
246 | break; |
247 | ||
248 | case 8: | |
8eb8c7d8 | 249 | smcconf->mode |= ATMEL_SMC_MODE_PS_8; |
6a4ec4cd BB |
250 | break; |
251 | ||
252 | case 16: | |
8eb8c7d8 | 253 | smcconf->mode |= ATMEL_SMC_MODE_PS_16; |
6a4ec4cd BB |
254 | break; |
255 | ||
256 | case 32: | |
8eb8c7d8 | 257 | smcconf->mode |= ATMEL_SMC_MODE_PS_32; |
6a4ec4cd BB |
258 | break; |
259 | ||
260 | default: | |
261 | return -EINVAL; | |
262 | } | |
263 | ||
8eb8c7d8 | 264 | smcconf->mode |= ATMEL_SMC_MODE_PMEN; |
6a4ec4cd BB |
265 | required = true; |
266 | } | |
267 | ||
9453fa46 | 268 | ret = atmel_ebi_xslate_smc_timings(ebid, np, &conf->smcconf); |
bc9b934b | 269 | if (ret < 0) |
8eb8c7d8 | 270 | return -EINVAL; |
6a4ec4cd | 271 | |
8eb8c7d8 | 272 | if ((ret > 0 && !required) || (!ret && required)) { |
db749d17 RH |
273 | dev_err(ebid->ebi->dev, "missing atmel,smc- properties in %pOF", |
274 | np); | |
8eb8c7d8 BB |
275 | return -EINVAL; |
276 | } | |
6a4ec4cd | 277 | |
8eb8c7d8 | 278 | return required; |
6a4ec4cd BB |
279 | } |
280 | ||
9453fa46 BB |
281 | static void at91sam9_ebi_apply_config(struct atmel_ebi_dev *ebid, |
282 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 283 | { |
8eb8c7d8 BB |
284 | atmel_smc_cs_conf_apply(ebid->ebi->smc.regmap, conf->cs, |
285 | &conf->smcconf); | |
6a4ec4cd BB |
286 | } |
287 | ||
9453fa46 BB |
288 | static void sama5_ebi_apply_config(struct atmel_ebi_dev *ebid, |
289 | struct atmel_ebi_dev_config *conf) | |
6a4ec4cd | 290 | { |
b0f3ab20 LD |
291 | atmel_hsmc_cs_conf_apply(ebid->ebi->smc.regmap, ebid->ebi->smc.layout, |
292 | conf->cs, &conf->smcconf); | |
6a4ec4cd BB |
293 | } |
294 | ||
9453fa46 BB |
295 | static int atmel_ebi_dev_setup(struct atmel_ebi *ebi, struct device_node *np, |
296 | int reg_cells) | |
6a4ec4cd | 297 | { |
9453fa46 BB |
298 | const struct atmel_ebi_caps *caps = ebi->caps; |
299 | struct atmel_ebi_dev_config conf = { }; | |
6a4ec4cd | 300 | struct device *dev = ebi->dev; |
9453fa46 | 301 | struct atmel_ebi_dev *ebid; |
987e079e BB |
302 | unsigned long cslines = 0; |
303 | int ret, numcs = 0, nentries, i; | |
6a4ec4cd | 304 | bool apply = false; |
987e079e | 305 | u32 cs; |
6a4ec4cd | 306 | |
987e079e BB |
307 | nentries = of_property_count_elems_of_size(np, "reg", |
308 | reg_cells * sizeof(u32)); | |
309 | for (i = 0; i < nentries; i++) { | |
310 | ret = of_property_read_u32_index(np, "reg", i * reg_cells, | |
311 | &cs); | |
312 | if (ret) | |
313 | return ret; | |
314 | ||
315 | if (cs >= AT91_MATRIX_EBI_NUM_CS || | |
316 | !(ebi->caps->available_cs & BIT(cs))) { | |
db749d17 | 317 | dev_err(dev, "invalid reg property in %pOF\n", np); |
987e079e BB |
318 | return -EINVAL; |
319 | } | |
320 | ||
321 | if (!test_and_set_bit(cs, &cslines)) | |
322 | numcs++; | |
323 | } | |
324 | ||
325 | if (!numcs) { | |
db749d17 | 326 | dev_err(dev, "invalid reg property in %pOF\n", np); |
6a4ec4cd BB |
327 | return -EINVAL; |
328 | } | |
329 | ||
f62df676 | 330 | ebid = devm_kzalloc(ebi->dev, struct_size(ebid, configs, numcs), |
6a4ec4cd BB |
331 | GFP_KERNEL); |
332 | if (!ebid) | |
333 | return -ENOMEM; | |
334 | ||
335 | ebid->ebi = ebi; | |
aaa572b9 | 336 | ebid->numcs = numcs; |
6a4ec4cd BB |
337 | |
338 | ret = caps->xlate_config(ebid, np, &conf); | |
339 | if (ret < 0) | |
340 | return ret; | |
341 | else if (ret) | |
342 | apply = true; | |
343 | ||
987e079e BB |
344 | i = 0; |
345 | for_each_set_bit(cs, &cslines, AT91_MATRIX_EBI_NUM_CS) { | |
6a4ec4cd BB |
346 | ebid->configs[i].cs = cs; |
347 | ||
348 | if (apply) { | |
349 | conf.cs = cs; | |
8eb8c7d8 | 350 | caps->apply_config(ebid, &conf); |
6a4ec4cd BB |
351 | } |
352 | ||
353 | caps->get_config(ebid, &ebid->configs[i]); | |
354 | ||
355 | /* | |
356 | * Attach the EBI device to the generic SMC logic if at least | |
357 | * one "atmel,smc-" property is present. | |
358 | */ | |
d9f81dad BB |
359 | if (ebi->caps->ebi_csa_offs && apply) |
360 | regmap_update_bits(ebi->matrix, | |
361 | ebi->caps->ebi_csa_offs, | |
362 | BIT(cs), 0); | |
987e079e BB |
363 | |
364 | i++; | |
6a4ec4cd BB |
365 | } |
366 | ||
367 | list_add_tail(&ebid->node, &ebi->devs); | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
9453fa46 | 372 | static const struct atmel_ebi_caps at91sam9260_ebi_caps = { |
6a4ec4cd | 373 | .available_cs = 0xff, |
d9f81dad | 374 | .ebi_csa_offs = AT91SAM9260_MATRIX_EBICSA, |
6a4ec4cd | 375 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 376 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 377 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
378 | }; |
379 | ||
9453fa46 | 380 | static const struct atmel_ebi_caps at91sam9261_ebi_caps = { |
6a4ec4cd | 381 | .available_cs = 0xff, |
d9f81dad | 382 | .ebi_csa_offs = AT91SAM9261_MATRIX_EBICSA, |
6a4ec4cd | 383 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 384 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 385 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
386 | }; |
387 | ||
9453fa46 | 388 | static const struct atmel_ebi_caps at91sam9263_ebi0_caps = { |
6a4ec4cd | 389 | .available_cs = 0x3f, |
d9f81dad | 390 | .ebi_csa_offs = AT91SAM9263_MATRIX_EBI0CSA, |
6a4ec4cd | 391 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 392 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 393 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
394 | }; |
395 | ||
9453fa46 | 396 | static const struct atmel_ebi_caps at91sam9263_ebi1_caps = { |
6a4ec4cd | 397 | .available_cs = 0x7, |
d9f81dad | 398 | .ebi_csa_offs = AT91SAM9263_MATRIX_EBI1CSA, |
6a4ec4cd | 399 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 400 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 401 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
402 | }; |
403 | ||
9453fa46 | 404 | static const struct atmel_ebi_caps at91sam9rl_ebi_caps = { |
6a4ec4cd | 405 | .available_cs = 0x3f, |
d9f81dad | 406 | .ebi_csa_offs = AT91SAM9RL_MATRIX_EBICSA, |
6a4ec4cd | 407 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 408 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 409 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
410 | }; |
411 | ||
9453fa46 | 412 | static const struct atmel_ebi_caps at91sam9g45_ebi_caps = { |
6a4ec4cd | 413 | .available_cs = 0x3f, |
d9f81dad | 414 | .ebi_csa_offs = AT91SAM9G45_MATRIX_EBICSA, |
6a4ec4cd | 415 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 416 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 417 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
418 | }; |
419 | ||
9453fa46 | 420 | static const struct atmel_ebi_caps at91sam9x5_ebi_caps = { |
6a4ec4cd | 421 | .available_cs = 0x3f, |
d9f81dad | 422 | .ebi_csa_offs = AT91SAM9X5_MATRIX_EBICSA, |
6a4ec4cd | 423 | .get_config = at91sam9_ebi_get_config, |
9453fa46 | 424 | .xlate_config = atmel_ebi_xslate_smc_config, |
6a4ec4cd | 425 | .apply_config = at91sam9_ebi_apply_config, |
6a4ec4cd BB |
426 | }; |
427 | ||
9453fa46 | 428 | static const struct atmel_ebi_caps sama5d3_ebi_caps = { |
6a4ec4cd | 429 | .available_cs = 0xf, |
8eb8c7d8 | 430 | .get_config = sama5_ebi_get_config, |
9453fa46 | 431 | .xlate_config = atmel_ebi_xslate_smc_config, |
8eb8c7d8 | 432 | .apply_config = sama5_ebi_apply_config, |
6a4ec4cd BB |
433 | }; |
434 | ||
9453fa46 | 435 | static const struct of_device_id atmel_ebi_id_table[] = { |
6a4ec4cd BB |
436 | { |
437 | .compatible = "atmel,at91sam9260-ebi", | |
438 | .data = &at91sam9260_ebi_caps, | |
439 | }, | |
440 | { | |
441 | .compatible = "atmel,at91sam9261-ebi", | |
442 | .data = &at91sam9261_ebi_caps, | |
443 | }, | |
444 | { | |
445 | .compatible = "atmel,at91sam9263-ebi0", | |
446 | .data = &at91sam9263_ebi0_caps, | |
447 | }, | |
448 | { | |
449 | .compatible = "atmel,at91sam9263-ebi1", | |
450 | .data = &at91sam9263_ebi1_caps, | |
451 | }, | |
452 | { | |
453 | .compatible = "atmel,at91sam9rl-ebi", | |
454 | .data = &at91sam9rl_ebi_caps, | |
455 | }, | |
456 | { | |
457 | .compatible = "atmel,at91sam9g45-ebi", | |
458 | .data = &at91sam9g45_ebi_caps, | |
459 | }, | |
460 | { | |
461 | .compatible = "atmel,at91sam9x5-ebi", | |
462 | .data = &at91sam9x5_ebi_caps, | |
463 | }, | |
464 | { | |
465 | .compatible = "atmel,sama5d3-ebi", | |
466 | .data = &sama5d3_ebi_caps, | |
467 | }, | |
468 | { /* sentinel */ } | |
469 | }; | |
6a4ec4cd | 470 | |
9453fa46 | 471 | static int atmel_ebi_dev_disable(struct atmel_ebi *ebi, struct device_node *np) |
6a4ec4cd BB |
472 | { |
473 | struct device *dev = ebi->dev; | |
474 | struct property *newprop; | |
475 | ||
476 | newprop = devm_kzalloc(dev, sizeof(*newprop), GFP_KERNEL); | |
477 | if (!newprop) | |
478 | return -ENOMEM; | |
479 | ||
480 | newprop->name = devm_kstrdup(dev, "status", GFP_KERNEL); | |
481 | if (!newprop->name) | |
482 | return -ENOMEM; | |
483 | ||
484 | newprop->value = devm_kstrdup(dev, "disabled", GFP_KERNEL); | |
ecc2d430 | 485 | if (!newprop->value) |
6a4ec4cd BB |
486 | return -ENOMEM; |
487 | ||
488 | newprop->length = sizeof("disabled"); | |
489 | ||
490 | return of_update_property(np, newprop); | |
491 | } | |
492 | ||
9453fa46 | 493 | static int atmel_ebi_probe(struct platform_device *pdev) |
6a4ec4cd BB |
494 | { |
495 | struct device *dev = &pdev->dev; | |
87108dc7 | 496 | struct device_node *child, *np = dev->of_node, *smc_np; |
6a4ec4cd | 497 | const struct of_device_id *match; |
9453fa46 | 498 | struct atmel_ebi *ebi; |
6a4ec4cd BB |
499 | int ret, reg_cells; |
500 | struct clk *clk; | |
501 | u32 val; | |
502 | ||
9453fa46 | 503 | match = of_match_device(atmel_ebi_id_table, dev); |
6a4ec4cd BB |
504 | if (!match || !match->data) |
505 | return -EINVAL; | |
506 | ||
507 | ebi = devm_kzalloc(dev, sizeof(*ebi), GFP_KERNEL); | |
508 | if (!ebi) | |
509 | return -ENOMEM; | |
510 | ||
4407319d BB |
511 | platform_set_drvdata(pdev, ebi); |
512 | ||
6a4ec4cd BB |
513 | INIT_LIST_HEAD(&ebi->devs); |
514 | ebi->caps = match->data; | |
515 | ebi->dev = dev; | |
516 | ||
517 | clk = devm_clk_get(dev, NULL); | |
518 | if (IS_ERR(clk)) | |
519 | return PTR_ERR(clk); | |
520 | ||
521 | ebi->clk = clk; | |
522 | ||
87108dc7 BB |
523 | smc_np = of_parse_phandle(dev->of_node, "atmel,smc", 0); |
524 | ||
525 | ebi->smc.regmap = syscon_node_to_regmap(smc_np); | |
526 | if (IS_ERR(ebi->smc.regmap)) | |
527 | return PTR_ERR(ebi->smc.regmap); | |
528 | ||
b0f3ab20 LD |
529 | ebi->smc.layout = atmel_hsmc_get_reg_layout(smc_np); |
530 | if (IS_ERR(ebi->smc.layout)) | |
531 | return PTR_ERR(ebi->smc.layout); | |
532 | ||
87108dc7 BB |
533 | ebi->smc.clk = of_clk_get(smc_np, 0); |
534 | if (IS_ERR(ebi->smc.clk)) { | |
535 | if (PTR_ERR(ebi->smc.clk) != -ENOENT) | |
536 | return PTR_ERR(ebi->smc.clk); | |
537 | ||
538 | ebi->smc.clk = NULL; | |
539 | } | |
540 | ret = clk_prepare_enable(ebi->smc.clk); | |
541 | if (ret) | |
542 | return ret; | |
6a4ec4cd BB |
543 | |
544 | /* | |
545 | * The sama5d3 does not provide an EBICSA register and thus does need | |
546 | * to access the matrix registers. | |
547 | */ | |
d9f81dad | 548 | if (ebi->caps->ebi_csa_offs) { |
6a4ec4cd BB |
549 | ebi->matrix = |
550 | syscon_regmap_lookup_by_phandle(np, "atmel,matrix"); | |
551 | if (IS_ERR(ebi->matrix)) | |
552 | return PTR_ERR(ebi->matrix); | |
6a4ec4cd BB |
553 | } |
554 | ||
6a4ec4cd BB |
555 | ret = of_property_read_u32(np, "#address-cells", &val); |
556 | if (ret) { | |
557 | dev_err(dev, "missing #address-cells property\n"); | |
558 | return ret; | |
559 | } | |
560 | ||
561 | reg_cells = val; | |
562 | ||
563 | ret = of_property_read_u32(np, "#size-cells", &val); | |
564 | if (ret) { | |
565 | dev_err(dev, "missing #address-cells property\n"); | |
566 | return ret; | |
567 | } | |
568 | ||
569 | reg_cells += val; | |
570 | ||
571 | for_each_available_child_of_node(np, child) { | |
572 | if (!of_find_property(child, "reg", NULL)) | |
573 | continue; | |
574 | ||
9453fa46 | 575 | ret = atmel_ebi_dev_setup(ebi, child, reg_cells); |
6a4ec4cd | 576 | if (ret) { |
db749d17 RH |
577 | dev_err(dev, "failed to configure EBI bus for %pOF, disabling the device", |
578 | child); | |
6a4ec4cd | 579 | |
9453fa46 | 580 | ret = atmel_ebi_dev_disable(ebi, child); |
6a4ec4cd BB |
581 | if (ret) |
582 | return ret; | |
583 | } | |
584 | } | |
585 | ||
586 | return of_platform_populate(np, NULL, NULL, dev); | |
587 | } | |
588 | ||
41b80bb1 | 589 | static __maybe_unused int atmel_ebi_resume(struct device *dev) |
4407319d BB |
590 | { |
591 | struct atmel_ebi *ebi = dev_get_drvdata(dev); | |
592 | struct atmel_ebi_dev *ebid; | |
593 | ||
594 | list_for_each_entry(ebid, &ebi->devs, node) { | |
595 | int i; | |
596 | ||
597 | for (i = 0; i < ebid->numcs; i++) | |
598 | ebid->ebi->caps->apply_config(ebid, &ebid->configs[i]); | |
599 | } | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
604 | static SIMPLE_DEV_PM_OPS(atmel_ebi_pm_ops, NULL, atmel_ebi_resume); | |
605 | ||
9453fa46 | 606 | static struct platform_driver atmel_ebi_driver = { |
6a4ec4cd BB |
607 | .driver = { |
608 | .name = "atmel-ebi", | |
9453fa46 | 609 | .of_match_table = atmel_ebi_id_table, |
4407319d | 610 | .pm = &atmel_ebi_pm_ops, |
6a4ec4cd BB |
611 | }, |
612 | }; | |
9453fa46 | 613 | builtin_platform_driver_probe(atmel_ebi_driver, atmel_ebi_probe); |