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Commit | Line | Data |
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971dac71 SW |
1 | /* |
2 | * Driver for the NVIDIA Tegra pinmux | |
3 | * | |
52f48fe0 | 4 | * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved. |
971dac71 SW |
5 | * |
6 | * Derived from code: | |
7 | * Copyright (C) 2010 Google, Inc. | |
8 | * Copyright (C) 2010 NVIDIA Corporation | |
9 | * Copyright (C) 2009-2011 ST-Ericsson AB | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms and conditions of the GNU General Public License, | |
13 | * version 2, as published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope it will be useful, but WITHOUT | |
16 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
17 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
18 | * more details. | |
19 | */ | |
20 | ||
21 | #include <linux/err.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/io.h> | |
24 | #include <linux/module.h> | |
52f48fe0 SW |
25 | #include <linux/of.h> |
26 | #include <linux/platform_device.h> | |
60f7f500 | 27 | #include <linux/pinctrl/machine.h> |
971dac71 SW |
28 | #include <linux/pinctrl/pinctrl.h> |
29 | #include <linux/pinctrl/pinmux.h> | |
30 | #include <linux/pinctrl/pinconf.h> | |
60f7f500 | 31 | #include <linux/slab.h> |
971dac71 | 32 | |
52f48fe0 | 33 | #include "core.h" |
971dac71 | 34 | #include "pinctrl-tegra.h" |
1ede12d4 | 35 | #include "pinctrl-utils.h" |
971dac71 | 36 | |
971dac71 SW |
37 | struct tegra_pmx { |
38 | struct device *dev; | |
39 | struct pinctrl_dev *pctl; | |
40 | ||
41 | const struct tegra_pinctrl_soc_data *soc; | |
ce436254 | 42 | const char **group_pins; |
971dac71 SW |
43 | |
44 | int nbanks; | |
45 | void __iomem **regs; | |
46 | }; | |
47 | ||
48 | static inline u32 pmx_readl(struct tegra_pmx *pmx, u32 bank, u32 reg) | |
49 | { | |
50 | return readl(pmx->regs[bank] + reg); | |
51 | } | |
52 | ||
53 | static inline void pmx_writel(struct tegra_pmx *pmx, u32 val, u32 bank, u32 reg) | |
54 | { | |
55 | writel(val, pmx->regs[bank] + reg); | |
56 | } | |
57 | ||
d1e90e9e | 58 | static int tegra_pinctrl_get_groups_count(struct pinctrl_dev *pctldev) |
971dac71 SW |
59 | { |
60 | struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev); | |
61 | ||
d1e90e9e | 62 | return pmx->soc->ngroups; |
971dac71 SW |
63 | } |
64 | ||
65 | static const char *tegra_pinctrl_get_group_name(struct pinctrl_dev *pctldev, | |
66 | unsigned group) | |
67 | { | |
68 | struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev); | |
69 | ||
971dac71 SW |
70 | return pmx->soc->groups[group].name; |
71 | } | |
72 | ||
73 | static int tegra_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, | |
74 | unsigned group, | |
75 | const unsigned **pins, | |
76 | unsigned *num_pins) | |
77 | { | |
78 | struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev); | |
79 | ||
971dac71 SW |
80 | *pins = pmx->soc->groups[group].pins; |
81 | *num_pins = pmx->soc->groups[group].npins; | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
b5badbaa | 86 | #ifdef CONFIG_DEBUG_FS |
971dac71 SW |
87 | static void tegra_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev, |
88 | struct seq_file *s, | |
89 | unsigned offset) | |
90 | { | |
52f48fe0 | 91 | seq_printf(s, " %s", dev_name(pctldev->dev)); |
971dac71 | 92 | } |
b5badbaa | 93 | #endif |
971dac71 | 94 | |
60f7f500 SW |
95 | static const struct cfg_param { |
96 | const char *property; | |
97 | enum tegra_pinconf_param param; | |
98 | } cfg_params[] = { | |
99 | {"nvidia,pull", TEGRA_PINCONF_PARAM_PULL}, | |
100 | {"nvidia,tristate", TEGRA_PINCONF_PARAM_TRISTATE}, | |
101 | {"nvidia,enable-input", TEGRA_PINCONF_PARAM_ENABLE_INPUT}, | |
102 | {"nvidia,open-drain", TEGRA_PINCONF_PARAM_OPEN_DRAIN}, | |
103 | {"nvidia,lock", TEGRA_PINCONF_PARAM_LOCK}, | |
104 | {"nvidia,io-reset", TEGRA_PINCONF_PARAM_IORESET}, | |
348d1bf7 | 105 | {"nvidia,rcv-sel", TEGRA_PINCONF_PARAM_RCV_SEL}, |
60f7f500 SW |
106 | {"nvidia,high-speed-mode", TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE}, |
107 | {"nvidia,schmitt", TEGRA_PINCONF_PARAM_SCHMITT}, | |
108 | {"nvidia,low-power-mode", TEGRA_PINCONF_PARAM_LOW_POWER_MODE}, | |
109 | {"nvidia,pull-down-strength", TEGRA_PINCONF_PARAM_DRIVE_DOWN_STRENGTH}, | |
110 | {"nvidia,pull-up-strength", TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH}, | |
111 | {"nvidia,slew-rate-falling", TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING}, | |
112 | {"nvidia,slew-rate-rising", TEGRA_PINCONF_PARAM_SLEW_RATE_RISING}, | |
348d1bf7 | 113 | {"nvidia,drive-type", TEGRA_PINCONF_PARAM_DRIVE_TYPE}, |
60f7f500 SW |
114 | }; |
115 | ||
1ede12d4 | 116 | static int tegra_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev, |
102caad9 AL |
117 | struct device_node *np, |
118 | struct pinctrl_map **map, | |
119 | unsigned *reserved_maps, | |
120 | unsigned *num_maps) | |
60f7f500 | 121 | { |
1ede12d4 | 122 | struct device *dev = pctldev->dev; |
60f7f500 SW |
123 | int ret, i; |
124 | const char *function; | |
125 | u32 val; | |
126 | unsigned long config; | |
127 | unsigned long *configs = NULL; | |
128 | unsigned num_configs = 0; | |
129 | unsigned reserve; | |
130 | struct property *prop; | |
131 | const char *group; | |
132 | ||
133 | ret = of_property_read_string(np, "nvidia,function", &function); | |
aef7704c SW |
134 | if (ret < 0) { |
135 | /* EINVAL=missing, which is fine since it's optional */ | |
136 | if (ret != -EINVAL) | |
137 | dev_err(dev, | |
138 | "could not parse property nvidia,function\n"); | |
60f7f500 | 139 | function = NULL; |
aef7704c | 140 | } |
60f7f500 SW |
141 | |
142 | for (i = 0; i < ARRAY_SIZE(cfg_params); i++) { | |
143 | ret = of_property_read_u32(np, cfg_params[i].property, &val); | |
144 | if (!ret) { | |
145 | config = TEGRA_PINCONF_PACK(cfg_params[i].param, val); | |
1ede12d4 LD |
146 | ret = pinctrl_utils_add_config(pctldev, &configs, |
147 | &num_configs, config); | |
60f7f500 SW |
148 | if (ret < 0) |
149 | goto exit; | |
aef7704c SW |
150 | /* EINVAL=missing, which is fine since it's optional */ |
151 | } else if (ret != -EINVAL) { | |
152 | dev_err(dev, "could not parse property %s\n", | |
153 | cfg_params[i].property); | |
60f7f500 SW |
154 | } |
155 | } | |
156 | ||
157 | reserve = 0; | |
158 | if (function != NULL) | |
159 | reserve++; | |
160 | if (num_configs) | |
161 | reserve++; | |
162 | ret = of_property_count_strings(np, "nvidia,pins"); | |
aef7704c SW |
163 | if (ret < 0) { |
164 | dev_err(dev, "could not parse property nvidia,pins\n"); | |
60f7f500 | 165 | goto exit; |
aef7704c | 166 | } |
60f7f500 SW |
167 | reserve *= ret; |
168 | ||
1ede12d4 LD |
169 | ret = pinctrl_utils_reserve_map(pctldev, map, reserved_maps, |
170 | num_maps, reserve); | |
60f7f500 SW |
171 | if (ret < 0) |
172 | goto exit; | |
173 | ||
174 | of_property_for_each_string(np, "nvidia,pins", prop, group) { | |
175 | if (function) { | |
1ede12d4 LD |
176 | ret = pinctrl_utils_add_map_mux(pctldev, map, |
177 | reserved_maps, num_maps, group, | |
178 | function); | |
60f7f500 SW |
179 | if (ret < 0) |
180 | goto exit; | |
181 | } | |
182 | ||
183 | if (num_configs) { | |
1ede12d4 LD |
184 | ret = pinctrl_utils_add_map_configs(pctldev, map, |
185 | reserved_maps, num_maps, group, | |
186 | configs, num_configs, | |
187 | PIN_MAP_TYPE_CONFIGS_GROUP); | |
60f7f500 SW |
188 | if (ret < 0) |
189 | goto exit; | |
190 | } | |
191 | } | |
192 | ||
193 | ret = 0; | |
194 | ||
195 | exit: | |
196 | kfree(configs); | |
197 | return ret; | |
198 | } | |
199 | ||
102caad9 AL |
200 | static int tegra_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev, |
201 | struct device_node *np_config, | |
202 | struct pinctrl_map **map, | |
203 | unsigned *num_maps) | |
60f7f500 SW |
204 | { |
205 | unsigned reserved_maps; | |
206 | struct device_node *np; | |
207 | int ret; | |
208 | ||
209 | reserved_maps = 0; | |
210 | *map = NULL; | |
211 | *num_maps = 0; | |
212 | ||
213 | for_each_child_of_node(np_config, np) { | |
1ede12d4 | 214 | ret = tegra_pinctrl_dt_subnode_to_map(pctldev, np, map, |
aef7704c | 215 | &reserved_maps, num_maps); |
60f7f500 | 216 | if (ret < 0) { |
1ede12d4 LD |
217 | pinctrl_utils_dt_free_map(pctldev, *map, |
218 | *num_maps); | |
60f7f500 SW |
219 | return ret; |
220 | } | |
221 | } | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
022ab148 | 226 | static const struct pinctrl_ops tegra_pinctrl_ops = { |
d1e90e9e | 227 | .get_groups_count = tegra_pinctrl_get_groups_count, |
971dac71 SW |
228 | .get_group_name = tegra_pinctrl_get_group_name, |
229 | .get_group_pins = tegra_pinctrl_get_group_pins, | |
b5badbaa | 230 | #ifdef CONFIG_DEBUG_FS |
971dac71 | 231 | .pin_dbg_show = tegra_pinctrl_pin_dbg_show, |
b5badbaa | 232 | #endif |
60f7f500 | 233 | .dt_node_to_map = tegra_pinctrl_dt_node_to_map, |
1ede12d4 | 234 | .dt_free_map = pinctrl_utils_dt_free_map, |
971dac71 SW |
235 | }; |
236 | ||
d1e90e9e | 237 | static int tegra_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev) |
971dac71 SW |
238 | { |
239 | struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev); | |
240 | ||
d1e90e9e | 241 | return pmx->soc->nfunctions; |
971dac71 SW |
242 | } |
243 | ||
244 | static const char *tegra_pinctrl_get_func_name(struct pinctrl_dev *pctldev, | |
245 | unsigned function) | |
246 | { | |
247 | struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev); | |
248 | ||
971dac71 SW |
249 | return pmx->soc->functions[function].name; |
250 | } | |
251 | ||
252 | static int tegra_pinctrl_get_func_groups(struct pinctrl_dev *pctldev, | |
253 | unsigned function, | |
254 | const char * const **groups, | |
255 | unsigned * const num_groups) | |
256 | { | |
257 | struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev); | |
258 | ||
971dac71 SW |
259 | *groups = pmx->soc->functions[function].groups; |
260 | *num_groups = pmx->soc->functions[function].ngroups; | |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
03e9f0ca LW |
265 | static int tegra_pinctrl_set_mux(struct pinctrl_dev *pctldev, |
266 | unsigned function, | |
267 | unsigned group) | |
971dac71 SW |
268 | { |
269 | struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev); | |
270 | const struct tegra_pingroup *g; | |
271 | int i; | |
272 | u32 val; | |
273 | ||
971dac71 SW |
274 | g = &pmx->soc->groups[group]; |
275 | ||
aef7704c | 276 | if (WARN_ON(g->mux_reg < 0)) |
971dac71 SW |
277 | return -EINVAL; |
278 | ||
279 | for (i = 0; i < ARRAY_SIZE(g->funcs); i++) { | |
280 | if (g->funcs[i] == function) | |
281 | break; | |
282 | } | |
aef7704c | 283 | if (WARN_ON(i == ARRAY_SIZE(g->funcs))) |
971dac71 SW |
284 | return -EINVAL; |
285 | ||
286 | val = pmx_readl(pmx, g->mux_bank, g->mux_reg); | |
287 | val &= ~(0x3 << g->mux_bit); | |
288 | val |= i << g->mux_bit; | |
289 | pmx_writel(pmx, val, g->mux_bank, g->mux_reg); | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
022ab148 | 294 | static const struct pinmux_ops tegra_pinmux_ops = { |
d1e90e9e | 295 | .get_functions_count = tegra_pinctrl_get_funcs_count, |
971dac71 SW |
296 | .get_function_name = tegra_pinctrl_get_func_name, |
297 | .get_function_groups = tegra_pinctrl_get_func_groups, | |
03e9f0ca | 298 | .set_mux = tegra_pinctrl_set_mux, |
971dac71 SW |
299 | }; |
300 | ||
301 | static int tegra_pinconf_reg(struct tegra_pmx *pmx, | |
302 | const struct tegra_pingroup *g, | |
303 | enum tegra_pinconf_param param, | |
b5badbaa | 304 | bool report_err, |
971dac71 SW |
305 | s8 *bank, s16 *reg, s8 *bit, s8 *width) |
306 | { | |
307 | switch (param) { | |
308 | case TEGRA_PINCONF_PARAM_PULL: | |
309 | *bank = g->pupd_bank; | |
310 | *reg = g->pupd_reg; | |
311 | *bit = g->pupd_bit; | |
312 | *width = 2; | |
313 | break; | |
314 | case TEGRA_PINCONF_PARAM_TRISTATE: | |
315 | *bank = g->tri_bank; | |
316 | *reg = g->tri_reg; | |
317 | *bit = g->tri_bit; | |
318 | *width = 1; | |
319 | break; | |
320 | case TEGRA_PINCONF_PARAM_ENABLE_INPUT: | |
e53b7974 SW |
321 | *bank = g->mux_bank; |
322 | *reg = g->mux_reg; | |
971dac71 SW |
323 | *bit = g->einput_bit; |
324 | *width = 1; | |
325 | break; | |
326 | case TEGRA_PINCONF_PARAM_OPEN_DRAIN: | |
e53b7974 SW |
327 | *bank = g->mux_bank; |
328 | *reg = g->mux_reg; | |
971dac71 SW |
329 | *bit = g->odrain_bit; |
330 | *width = 1; | |
331 | break; | |
332 | case TEGRA_PINCONF_PARAM_LOCK: | |
e53b7974 SW |
333 | *bank = g->mux_bank; |
334 | *reg = g->mux_reg; | |
971dac71 SW |
335 | *bit = g->lock_bit; |
336 | *width = 1; | |
337 | break; | |
338 | case TEGRA_PINCONF_PARAM_IORESET: | |
e53b7974 SW |
339 | *bank = g->mux_bank; |
340 | *reg = g->mux_reg; | |
971dac71 SW |
341 | *bit = g->ioreset_bit; |
342 | *width = 1; | |
343 | break; | |
348d1bf7 | 344 | case TEGRA_PINCONF_PARAM_RCV_SEL: |
e53b7974 SW |
345 | *bank = g->mux_bank; |
346 | *reg = g->mux_reg; | |
348d1bf7 PR |
347 | *bit = g->rcv_sel_bit; |
348 | *width = 1; | |
349 | break; | |
971dac71 SW |
350 | case TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE: |
351 | *bank = g->drv_bank; | |
352 | *reg = g->drv_reg; | |
353 | *bit = g->hsm_bit; | |
354 | *width = 1; | |
355 | break; | |
356 | case TEGRA_PINCONF_PARAM_SCHMITT: | |
357 | *bank = g->drv_bank; | |
358 | *reg = g->drv_reg; | |
359 | *bit = g->schmitt_bit; | |
360 | *width = 1; | |
361 | break; | |
362 | case TEGRA_PINCONF_PARAM_LOW_POWER_MODE: | |
363 | *bank = g->drv_bank; | |
364 | *reg = g->drv_reg; | |
365 | *bit = g->lpmd_bit; | |
154f3ebf | 366 | *width = 2; |
971dac71 SW |
367 | break; |
368 | case TEGRA_PINCONF_PARAM_DRIVE_DOWN_STRENGTH: | |
369 | *bank = g->drv_bank; | |
370 | *reg = g->drv_reg; | |
371 | *bit = g->drvdn_bit; | |
372 | *width = g->drvdn_width; | |
373 | break; | |
374 | case TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH: | |
375 | *bank = g->drv_bank; | |
376 | *reg = g->drv_reg; | |
377 | *bit = g->drvup_bit; | |
378 | *width = g->drvup_width; | |
379 | break; | |
380 | case TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING: | |
381 | *bank = g->drv_bank; | |
382 | *reg = g->drv_reg; | |
383 | *bit = g->slwf_bit; | |
384 | *width = g->slwf_width; | |
385 | break; | |
386 | case TEGRA_PINCONF_PARAM_SLEW_RATE_RISING: | |
387 | *bank = g->drv_bank; | |
388 | *reg = g->drv_reg; | |
389 | *bit = g->slwr_bit; | |
390 | *width = g->slwr_width; | |
391 | break; | |
348d1bf7 | 392 | case TEGRA_PINCONF_PARAM_DRIVE_TYPE: |
e53b7974 SW |
393 | *bank = g->drv_bank; |
394 | *reg = g->drv_reg; | |
348d1bf7 PR |
395 | *bit = g->drvtype_bit; |
396 | *width = 2; | |
397 | break; | |
971dac71 SW |
398 | default: |
399 | dev_err(pmx->dev, "Invalid config param %04x\n", param); | |
400 | return -ENOTSUPP; | |
401 | } | |
402 | ||
e53b7974 | 403 | if (*reg < 0 || *bit > 31) { |
36e80dca SW |
404 | if (report_err) { |
405 | const char *prop = "unknown"; | |
406 | int i; | |
407 | ||
408 | for (i = 0; i < ARRAY_SIZE(cfg_params); i++) { | |
409 | if (cfg_params[i].param == param) { | |
410 | prop = cfg_params[i].property; | |
411 | break; | |
412 | } | |
413 | } | |
414 | ||
b5badbaa | 415 | dev_err(pmx->dev, |
36e80dca SW |
416 | "Config param %04x (%s) not supported on group %s\n", |
417 | param, prop, g->name); | |
418 | } | |
971dac71 SW |
419 | return -ENOTSUPP; |
420 | } | |
421 | ||
422 | return 0; | |
423 | } | |
424 | ||
425 | static int tegra_pinconf_get(struct pinctrl_dev *pctldev, | |
426 | unsigned pin, unsigned long *config) | |
427 | { | |
aef7704c | 428 | dev_err(pctldev->dev, "pin_config_get op not supported\n"); |
971dac71 SW |
429 | return -ENOTSUPP; |
430 | } | |
431 | ||
432 | static int tegra_pinconf_set(struct pinctrl_dev *pctldev, | |
03b054e9 SY |
433 | unsigned pin, unsigned long *configs, |
434 | unsigned num_configs) | |
971dac71 | 435 | { |
aef7704c | 436 | dev_err(pctldev->dev, "pin_config_set op not supported\n"); |
971dac71 SW |
437 | return -ENOTSUPP; |
438 | } | |
439 | ||
440 | static int tegra_pinconf_group_get(struct pinctrl_dev *pctldev, | |
441 | unsigned group, unsigned long *config) | |
442 | { | |
443 | struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev); | |
444 | enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(*config); | |
445 | u16 arg; | |
446 | const struct tegra_pingroup *g; | |
447 | int ret; | |
448 | s8 bank, bit, width; | |
449 | s16 reg; | |
450 | u32 val, mask; | |
451 | ||
971dac71 SW |
452 | g = &pmx->soc->groups[group]; |
453 | ||
b5badbaa SW |
454 | ret = tegra_pinconf_reg(pmx, g, param, true, &bank, ®, &bit, |
455 | &width); | |
971dac71 SW |
456 | if (ret < 0) |
457 | return ret; | |
458 | ||
459 | val = pmx_readl(pmx, bank, reg); | |
460 | mask = (1 << width) - 1; | |
461 | arg = (val >> bit) & mask; | |
462 | ||
463 | *config = TEGRA_PINCONF_PACK(param, arg); | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
468 | static int tegra_pinconf_group_set(struct pinctrl_dev *pctldev, | |
03b054e9 SY |
469 | unsigned group, unsigned long *configs, |
470 | unsigned num_configs) | |
971dac71 SW |
471 | { |
472 | struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev); | |
03b054e9 SY |
473 | enum tegra_pinconf_param param; |
474 | u16 arg; | |
971dac71 | 475 | const struct tegra_pingroup *g; |
03b054e9 | 476 | int ret, i; |
971dac71 SW |
477 | s8 bank, bit, width; |
478 | s16 reg; | |
479 | u32 val, mask; | |
480 | ||
971dac71 SW |
481 | g = &pmx->soc->groups[group]; |
482 | ||
03b054e9 SY |
483 | for (i = 0; i < num_configs; i++) { |
484 | param = TEGRA_PINCONF_UNPACK_PARAM(configs[i]); | |
485 | arg = TEGRA_PINCONF_UNPACK_ARG(configs[i]); | |
971dac71 | 486 | |
03b054e9 SY |
487 | ret = tegra_pinconf_reg(pmx, g, param, true, &bank, ®, &bit, |
488 | &width); | |
489 | if (ret < 0) | |
490 | return ret; | |
971dac71 | 491 | |
03b054e9 SY |
492 | val = pmx_readl(pmx, bank, reg); |
493 | ||
494 | /* LOCK can't be cleared */ | |
495 | if (param == TEGRA_PINCONF_PARAM_LOCK) { | |
496 | if ((val & BIT(bit)) && !arg) { | |
497 | dev_err(pctldev->dev, "LOCK bit cannot be cleared\n"); | |
498 | return -EINVAL; | |
499 | } | |
aef7704c | 500 | } |
971dac71 | 501 | |
03b054e9 SY |
502 | /* Special-case Boolean values; allow any non-zero as true */ |
503 | if (width == 1) | |
504 | arg = !!arg; | |
971dac71 | 505 | |
03b054e9 SY |
506 | /* Range-check user-supplied value */ |
507 | mask = (1 << width) - 1; | |
508 | if (arg & ~mask) { | |
509 | dev_err(pctldev->dev, | |
510 | "config %lx: %x too big for %d bit register\n", | |
511 | configs[i], arg, width); | |
512 | return -EINVAL; | |
513 | } | |
971dac71 | 514 | |
03b054e9 SY |
515 | /* Update register */ |
516 | val &= ~(mask << bit); | |
517 | val |= arg << bit; | |
518 | pmx_writel(pmx, val, bank, reg); | |
519 | } /* for each config */ | |
971dac71 SW |
520 | |
521 | return 0; | |
522 | } | |
523 | ||
b5badbaa | 524 | #ifdef CONFIG_DEBUG_FS |
971dac71 SW |
525 | static void tegra_pinconf_dbg_show(struct pinctrl_dev *pctldev, |
526 | struct seq_file *s, unsigned offset) | |
527 | { | |
528 | } | |
529 | ||
b5badbaa SW |
530 | static const char *strip_prefix(const char *s) |
531 | { | |
532 | const char *comma = strchr(s, ','); | |
533 | if (!comma) | |
534 | return s; | |
535 | ||
536 | return comma + 1; | |
537 | } | |
538 | ||
971dac71 | 539 | static void tegra_pinconf_group_dbg_show(struct pinctrl_dev *pctldev, |
b5badbaa SW |
540 | struct seq_file *s, unsigned group) |
541 | { | |
542 | struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev); | |
543 | const struct tegra_pingroup *g; | |
544 | int i, ret; | |
545 | s8 bank, bit, width; | |
546 | s16 reg; | |
547 | u32 val; | |
548 | ||
549 | g = &pmx->soc->groups[group]; | |
550 | ||
551 | for (i = 0; i < ARRAY_SIZE(cfg_params); i++) { | |
552 | ret = tegra_pinconf_reg(pmx, g, cfg_params[i].param, false, | |
553 | &bank, ®, &bit, &width); | |
554 | if (ret < 0) | |
555 | continue; | |
556 | ||
557 | val = pmx_readl(pmx, bank, reg); | |
558 | val >>= bit; | |
559 | val &= (1 << width) - 1; | |
560 | ||
561 | seq_printf(s, "\n\t%s=%u", | |
562 | strip_prefix(cfg_params[i].property), val); | |
563 | } | |
564 | } | |
565 | ||
566 | static void tegra_pinconf_config_dbg_show(struct pinctrl_dev *pctldev, | |
567 | struct seq_file *s, | |
568 | unsigned long config) | |
971dac71 | 569 | { |
b5badbaa SW |
570 | enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(config); |
571 | u16 arg = TEGRA_PINCONF_UNPACK_ARG(config); | |
572 | const char *pname = "unknown"; | |
573 | int i; | |
574 | ||
575 | for (i = 0; i < ARRAY_SIZE(cfg_params); i++) { | |
576 | if (cfg_params[i].param == param) { | |
577 | pname = cfg_params[i].property; | |
578 | break; | |
579 | } | |
580 | } | |
581 | ||
582 | seq_printf(s, "%s=%d", strip_prefix(pname), arg); | |
971dac71 | 583 | } |
b5badbaa | 584 | #endif |
971dac71 | 585 | |
022ab148 | 586 | static const struct pinconf_ops tegra_pinconf_ops = { |
971dac71 SW |
587 | .pin_config_get = tegra_pinconf_get, |
588 | .pin_config_set = tegra_pinconf_set, | |
589 | .pin_config_group_get = tegra_pinconf_group_get, | |
590 | .pin_config_group_set = tegra_pinconf_group_set, | |
b5badbaa | 591 | #ifdef CONFIG_DEBUG_FS |
971dac71 SW |
592 | .pin_config_dbg_show = tegra_pinconf_dbg_show, |
593 | .pin_config_group_dbg_show = tegra_pinconf_group_dbg_show, | |
b5badbaa SW |
594 | .pin_config_config_dbg_show = tegra_pinconf_config_dbg_show, |
595 | #endif | |
971dac71 SW |
596 | }; |
597 | ||
598 | static struct pinctrl_gpio_range tegra_pinctrl_gpio_range = { | |
599 | .name = "Tegra GPIOs", | |
600 | .id = 0, | |
601 | .base = 0, | |
602 | }; | |
603 | ||
604 | static struct pinctrl_desc tegra_pinctrl_desc = { | |
971dac71 SW |
605 | .pctlops = &tegra_pinctrl_ops, |
606 | .pmxops = &tegra_pinmux_ops, | |
607 | .confops = &tegra_pinconf_ops, | |
608 | .owner = THIS_MODULE, | |
609 | }; | |
610 | ||
150632b0 | 611 | int tegra_pinctrl_probe(struct platform_device *pdev, |
52f48fe0 | 612 | const struct tegra_pinctrl_soc_data *soc_data) |
971dac71 | 613 | { |
971dac71 SW |
614 | struct tegra_pmx *pmx; |
615 | struct resource *res; | |
616 | int i; | |
ce436254 SW |
617 | const char **group_pins; |
618 | int fn, gn, gfn; | |
971dac71 | 619 | |
971dac71 SW |
620 | pmx = devm_kzalloc(&pdev->dev, sizeof(*pmx), GFP_KERNEL); |
621 | if (!pmx) { | |
622 | dev_err(&pdev->dev, "Can't alloc tegra_pmx\n"); | |
623 | return -ENOMEM; | |
624 | } | |
625 | pmx->dev = &pdev->dev; | |
52f48fe0 | 626 | pmx->soc = soc_data; |
971dac71 | 627 | |
ce436254 SW |
628 | /* |
629 | * Each mux group will appear in 4 functions' list of groups. | |
630 | * This over-allocates slightly, since not all groups are mux groups. | |
631 | */ | |
632 | pmx->group_pins = devm_kzalloc(&pdev->dev, | |
633 | soc_data->ngroups * 4 * sizeof(*pmx->group_pins), | |
634 | GFP_KERNEL); | |
635 | if (!pmx->group_pins) | |
636 | return -ENOMEM; | |
637 | ||
638 | group_pins = pmx->group_pins; | |
639 | for (fn = 0; fn < soc_data->nfunctions; fn++) { | |
640 | struct tegra_function *func = &soc_data->functions[fn]; | |
641 | ||
642 | func->groups = group_pins; | |
643 | ||
644 | for (gn = 0; gn < soc_data->ngroups; gn++) { | |
645 | const struct tegra_pingroup *g = &soc_data->groups[gn]; | |
646 | ||
647 | if (g->mux_reg == -1) | |
648 | continue; | |
649 | ||
650 | for (gfn = 0; gfn < 4; gfn++) | |
651 | if (g->funcs[gfn] == fn) | |
652 | break; | |
653 | if (gfn == 4) | |
654 | continue; | |
655 | ||
656 | BUG_ON(group_pins - pmx->group_pins >= | |
657 | soc_data->ngroups * 4); | |
658 | *group_pins++ = g->name; | |
659 | func->ngroups++; | |
660 | } | |
661 | } | |
662 | ||
971dac71 | 663 | tegra_pinctrl_gpio_range.npins = pmx->soc->ngpios; |
52f48fe0 | 664 | tegra_pinctrl_desc.name = dev_name(&pdev->dev); |
971dac71 SW |
665 | tegra_pinctrl_desc.pins = pmx->soc->pins; |
666 | tegra_pinctrl_desc.npins = pmx->soc->npins; | |
667 | ||
668 | for (i = 0; ; i++) { | |
669 | res = platform_get_resource(pdev, IORESOURCE_MEM, i); | |
670 | if (!res) | |
671 | break; | |
672 | } | |
673 | pmx->nbanks = i; | |
674 | ||
675 | pmx->regs = devm_kzalloc(&pdev->dev, pmx->nbanks * sizeof(*pmx->regs), | |
676 | GFP_KERNEL); | |
677 | if (!pmx->regs) { | |
678 | dev_err(&pdev->dev, "Can't alloc regs pointer\n"); | |
5b232c5a | 679 | return -ENOMEM; |
971dac71 SW |
680 | } |
681 | ||
682 | for (i = 0; i < pmx->nbanks; i++) { | |
683 | res = platform_get_resource(pdev, IORESOURCE_MEM, i); | |
394a8ff8 AL |
684 | pmx->regs[i] = devm_ioremap_resource(&pdev->dev, res); |
685 | if (IS_ERR(pmx->regs[i])) | |
686 | return PTR_ERR(pmx->regs[i]); | |
971dac71 SW |
687 | } |
688 | ||
689 | pmx->pctl = pinctrl_register(&tegra_pinctrl_desc, &pdev->dev, pmx); | |
cb0f7d35 | 690 | if (!pmx->pctl) { |
971dac71 | 691 | dev_err(&pdev->dev, "Couldn't register pinctrl driver\n"); |
cb0f7d35 | 692 | return -ENODEV; |
971dac71 SW |
693 | } |
694 | ||
695 | pinctrl_add_gpio_range(pmx->pctl, &tegra_pinctrl_gpio_range); | |
696 | ||
697 | platform_set_drvdata(pdev, pmx); | |
698 | ||
699 | dev_dbg(&pdev->dev, "Probed Tegra pinctrl driver\n"); | |
700 | ||
701 | return 0; | |
702 | } | |
52f48fe0 | 703 | EXPORT_SYMBOL_GPL(tegra_pinctrl_probe); |
971dac71 | 704 | |
f90f54b3 | 705 | int tegra_pinctrl_remove(struct platform_device *pdev) |
971dac71 SW |
706 | { |
707 | struct tegra_pmx *pmx = platform_get_drvdata(pdev); | |
708 | ||
971dac71 SW |
709 | pinctrl_unregister(pmx->pctl); |
710 | ||
711 | return 0; | |
712 | } | |
52f48fe0 | 713 | EXPORT_SYMBOL_GPL(tegra_pinctrl_remove); |