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eadff302 II |
1 | /* |
2 | * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 and | |
6 | * only version 2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | */ | |
13 | ||
14 | #include <linux/gpio.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/of.h> | |
ab4256cf | 17 | #include <linux/of_irq.h> |
eadff302 II |
18 | #include <linux/pinctrl/pinconf-generic.h> |
19 | #include <linux/pinctrl/pinconf.h> | |
20 | #include <linux/pinctrl/pinmux.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/regmap.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/types.h> | |
25 | ||
26 | #include <dt-bindings/pinctrl/qcom,pmic-gpio.h> | |
27 | ||
28 | #include "../core.h" | |
29 | #include "../pinctrl-utils.h" | |
30 | ||
31 | #define PMIC_GPIO_ADDRESS_RANGE 0x100 | |
32 | ||
33 | /* type and subtype registers base address offsets */ | |
34 | #define PMIC_GPIO_REG_TYPE 0x4 | |
35 | #define PMIC_GPIO_REG_SUBTYPE 0x5 | |
36 | ||
37 | /* GPIO peripheral type and subtype out_values */ | |
38 | #define PMIC_GPIO_TYPE 0x10 | |
39 | #define PMIC_GPIO_SUBTYPE_GPIO_4CH 0x1 | |
40 | #define PMIC_GPIO_SUBTYPE_GPIOC_4CH 0x5 | |
41 | #define PMIC_GPIO_SUBTYPE_GPIO_8CH 0x9 | |
42 | #define PMIC_GPIO_SUBTYPE_GPIOC_8CH 0xd | |
43 | ||
44 | #define PMIC_MPP_REG_RT_STS 0x10 | |
45 | #define PMIC_MPP_REG_RT_STS_VAL_MASK 0x1 | |
46 | ||
47 | /* control register base address offsets */ | |
48 | #define PMIC_GPIO_REG_MODE_CTL 0x40 | |
49 | #define PMIC_GPIO_REG_DIG_VIN_CTL 0x41 | |
50 | #define PMIC_GPIO_REG_DIG_PULL_CTL 0x42 | |
51 | #define PMIC_GPIO_REG_DIG_OUT_CTL 0x45 | |
52 | #define PMIC_GPIO_REG_EN_CTL 0x46 | |
53 | ||
54 | /* PMIC_GPIO_REG_MODE_CTL */ | |
55 | #define PMIC_GPIO_REG_MODE_VALUE_SHIFT 0x1 | |
56 | #define PMIC_GPIO_REG_MODE_FUNCTION_SHIFT 1 | |
57 | #define PMIC_GPIO_REG_MODE_FUNCTION_MASK 0x7 | |
58 | #define PMIC_GPIO_REG_MODE_DIR_SHIFT 4 | |
59 | #define PMIC_GPIO_REG_MODE_DIR_MASK 0x7 | |
60 | ||
61 | /* PMIC_GPIO_REG_DIG_VIN_CTL */ | |
62 | #define PMIC_GPIO_REG_VIN_SHIFT 0 | |
63 | #define PMIC_GPIO_REG_VIN_MASK 0x7 | |
64 | ||
65 | /* PMIC_GPIO_REG_DIG_PULL_CTL */ | |
66 | #define PMIC_GPIO_REG_PULL_SHIFT 0 | |
67 | #define PMIC_GPIO_REG_PULL_MASK 0x7 | |
68 | ||
69 | #define PMIC_GPIO_PULL_DOWN 4 | |
70 | #define PMIC_GPIO_PULL_DISABLE 5 | |
71 | ||
72 | /* PMIC_GPIO_REG_DIG_OUT_CTL */ | |
73 | #define PMIC_GPIO_REG_OUT_STRENGTH_SHIFT 0 | |
74 | #define PMIC_GPIO_REG_OUT_STRENGTH_MASK 0x3 | |
75 | #define PMIC_GPIO_REG_OUT_TYPE_SHIFT 4 | |
76 | #define PMIC_GPIO_REG_OUT_TYPE_MASK 0x3 | |
77 | ||
78 | /* | |
79 | * Output type - indicates pin should be configured as push-pull, | |
80 | * open drain or open source. | |
81 | */ | |
82 | #define PMIC_GPIO_OUT_BUF_CMOS 0 | |
83 | #define PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS 1 | |
84 | #define PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS 2 | |
85 | ||
86 | /* PMIC_GPIO_REG_EN_CTL */ | |
87 | #define PMIC_GPIO_REG_MASTER_EN_SHIFT 7 | |
88 | ||
89 | #define PMIC_GPIO_PHYSICAL_OFFSET 1 | |
90 | ||
91 | /* Qualcomm specific pin configurations */ | |
92 | #define PMIC_GPIO_CONF_PULL_UP (PIN_CONFIG_END + 1) | |
93 | #define PMIC_GPIO_CONF_STRENGTH (PIN_CONFIG_END + 2) | |
94 | ||
95 | /** | |
96 | * struct pmic_gpio_pad - keep current GPIO settings | |
97 | * @base: Address base in SPMI device. | |
98 | * @irq: IRQ number which this GPIO generate. | |
99 | * @is_enabled: Set to false when GPIO should be put in high Z state. | |
100 | * @out_value: Cached pin output value | |
101 | * @have_buffer: Set to true if GPIO output could be configured in push-pull, | |
102 | * open-drain or open-source mode. | |
103 | * @output_enabled: Set to true if GPIO output logic is enabled. | |
104 | * @input_enabled: Set to true if GPIO input buffer logic is enabled. | |
105 | * @num_sources: Number of power-sources supported by this GPIO. | |
106 | * @power_source: Current power-source used. | |
107 | * @buffer_type: Push-pull, open-drain or open-source. | |
108 | * @pullup: Constant current which flow trough GPIO output buffer. | |
109 | * @strength: No, Low, Medium, High | |
110 | * @function: See pmic_gpio_functions[] | |
111 | */ | |
112 | struct pmic_gpio_pad { | |
113 | u16 base; | |
114 | int irq; | |
115 | bool is_enabled; | |
116 | bool out_value; | |
117 | bool have_buffer; | |
118 | bool output_enabled; | |
119 | bool input_enabled; | |
120 | unsigned int num_sources; | |
121 | unsigned int power_source; | |
122 | unsigned int buffer_type; | |
123 | unsigned int pullup; | |
124 | unsigned int strength; | |
125 | unsigned int function; | |
126 | }; | |
127 | ||
128 | struct pmic_gpio_state { | |
129 | struct device *dev; | |
130 | struct regmap *map; | |
131 | struct pinctrl_dev *ctrl; | |
132 | struct gpio_chip chip; | |
133 | }; | |
134 | ||
f684e4ac | 135 | static const struct pinconf_generic_params pmic_gpio_bindings[] = { |
7382b623 SB |
136 | {"qcom,pull-up-strength", PMIC_GPIO_CONF_PULL_UP, 0}, |
137 | {"qcom,drive-strength", PMIC_GPIO_CONF_STRENGTH, 0}, | |
eadff302 II |
138 | }; |
139 | ||
4f06266a | 140 | #ifdef CONFIG_DEBUG_FS |
7382b623 SB |
141 | static const struct pin_config_item pmic_conf_items[ARRAY_SIZE(pmic_gpio_bindings)] = { |
142 | PCONFDUMP(PMIC_GPIO_CONF_PULL_UP, "pull up strength", NULL, true), | |
143 | PCONFDUMP(PMIC_GPIO_CONF_STRENGTH, "drive-strength", NULL, true), | |
eadff302 | 144 | }; |
4f06266a | 145 | #endif |
eadff302 II |
146 | |
147 | static const char *const pmic_gpio_groups[] = { | |
148 | "gpio1", "gpio2", "gpio3", "gpio4", "gpio5", "gpio6", "gpio7", "gpio8", | |
149 | "gpio9", "gpio10", "gpio11", "gpio12", "gpio13", "gpio14", "gpio15", | |
150 | "gpio16", "gpio17", "gpio18", "gpio19", "gpio20", "gpio21", "gpio22", | |
151 | "gpio23", "gpio24", "gpio25", "gpio26", "gpio27", "gpio28", "gpio29", | |
152 | "gpio30", "gpio31", "gpio32", "gpio33", "gpio34", "gpio35", "gpio36", | |
153 | }; | |
154 | ||
155 | static const char *const pmic_gpio_functions[] = { | |
156 | PMIC_GPIO_FUNC_NORMAL, PMIC_GPIO_FUNC_PAIRED, | |
157 | PMIC_GPIO_FUNC_FUNC1, PMIC_GPIO_FUNC_FUNC2, | |
158 | PMIC_GPIO_FUNC_DTEST1, PMIC_GPIO_FUNC_DTEST2, | |
159 | PMIC_GPIO_FUNC_DTEST3, PMIC_GPIO_FUNC_DTEST4, | |
160 | }; | |
161 | ||
eadff302 II |
162 | static int pmic_gpio_read(struct pmic_gpio_state *state, |
163 | struct pmic_gpio_pad *pad, unsigned int addr) | |
164 | { | |
165 | unsigned int val; | |
166 | int ret; | |
167 | ||
168 | ret = regmap_read(state->map, pad->base + addr, &val); | |
169 | if (ret < 0) | |
170 | dev_err(state->dev, "read 0x%x failed\n", addr); | |
171 | else | |
172 | ret = val; | |
173 | ||
174 | return ret; | |
175 | } | |
176 | ||
177 | static int pmic_gpio_write(struct pmic_gpio_state *state, | |
178 | struct pmic_gpio_pad *pad, unsigned int addr, | |
179 | unsigned int val) | |
180 | { | |
181 | int ret; | |
182 | ||
183 | ret = regmap_write(state->map, pad->base + addr, val); | |
184 | if (ret < 0) | |
185 | dev_err(state->dev, "write 0x%x failed\n", addr); | |
186 | ||
187 | return ret; | |
188 | } | |
189 | ||
190 | static int pmic_gpio_get_groups_count(struct pinctrl_dev *pctldev) | |
191 | { | |
192 | /* Every PIN is a group */ | |
193 | return pctldev->desc->npins; | |
194 | } | |
195 | ||
196 | static const char *pmic_gpio_get_group_name(struct pinctrl_dev *pctldev, | |
197 | unsigned pin) | |
198 | { | |
199 | return pctldev->desc->pins[pin].name; | |
200 | } | |
201 | ||
202 | static int pmic_gpio_get_group_pins(struct pinctrl_dev *pctldev, unsigned pin, | |
203 | const unsigned **pins, unsigned *num_pins) | |
204 | { | |
205 | *pins = &pctldev->desc->pins[pin].number; | |
206 | *num_pins = 1; | |
207 | return 0; | |
208 | } | |
209 | ||
eadff302 II |
210 | static const struct pinctrl_ops pmic_gpio_pinctrl_ops = { |
211 | .get_groups_count = pmic_gpio_get_groups_count, | |
212 | .get_group_name = pmic_gpio_get_group_name, | |
213 | .get_group_pins = pmic_gpio_get_group_pins, | |
7382b623 | 214 | .dt_node_to_map = pinconf_generic_dt_node_to_map_group, |
d32f7fd3 | 215 | .dt_free_map = pinctrl_utils_free_map, |
eadff302 II |
216 | }; |
217 | ||
218 | static int pmic_gpio_get_functions_count(struct pinctrl_dev *pctldev) | |
219 | { | |
220 | return ARRAY_SIZE(pmic_gpio_functions); | |
221 | } | |
222 | ||
223 | static const char *pmic_gpio_get_function_name(struct pinctrl_dev *pctldev, | |
224 | unsigned function) | |
225 | { | |
226 | return pmic_gpio_functions[function]; | |
227 | } | |
228 | ||
229 | static int pmic_gpio_get_function_groups(struct pinctrl_dev *pctldev, | |
230 | unsigned function, | |
231 | const char *const **groups, | |
232 | unsigned *const num_qgroups) | |
233 | { | |
234 | *groups = pmic_gpio_groups; | |
235 | *num_qgroups = pctldev->desc->npins; | |
236 | return 0; | |
237 | } | |
238 | ||
239 | static int pmic_gpio_set_mux(struct pinctrl_dev *pctldev, unsigned function, | |
240 | unsigned pin) | |
241 | { | |
242 | struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev); | |
243 | struct pmic_gpio_pad *pad; | |
244 | unsigned int val; | |
245 | int ret; | |
246 | ||
247 | pad = pctldev->desc->pins[pin].drv_data; | |
248 | ||
249 | pad->function = function; | |
250 | ||
251 | val = 0; | |
252 | if (pad->output_enabled) { | |
253 | if (pad->input_enabled) | |
254 | val = 2; | |
255 | else | |
256 | val = 1; | |
257 | } | |
258 | ||
dc391502 | 259 | val = val << PMIC_GPIO_REG_MODE_DIR_SHIFT; |
eadff302 II |
260 | val |= pad->function << PMIC_GPIO_REG_MODE_FUNCTION_SHIFT; |
261 | val |= pad->out_value & PMIC_GPIO_REG_MODE_VALUE_SHIFT; | |
262 | ||
263 | ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_MODE_CTL, val); | |
264 | if (ret < 0) | |
265 | return ret; | |
266 | ||
267 | val = pad->is_enabled << PMIC_GPIO_REG_MASTER_EN_SHIFT; | |
268 | ||
269 | return pmic_gpio_write(state, pad, PMIC_GPIO_REG_EN_CTL, val); | |
270 | } | |
271 | ||
272 | static const struct pinmux_ops pmic_gpio_pinmux_ops = { | |
273 | .get_functions_count = pmic_gpio_get_functions_count, | |
274 | .get_function_name = pmic_gpio_get_function_name, | |
275 | .get_function_groups = pmic_gpio_get_function_groups, | |
276 | .set_mux = pmic_gpio_set_mux, | |
277 | }; | |
278 | ||
279 | static int pmic_gpio_config_get(struct pinctrl_dev *pctldev, | |
280 | unsigned int pin, unsigned long *config) | |
281 | { | |
282 | unsigned param = pinconf_to_config_param(*config); | |
283 | struct pmic_gpio_pad *pad; | |
284 | unsigned arg; | |
285 | ||
286 | pad = pctldev->desc->pins[pin].drv_data; | |
287 | ||
288 | switch (param) { | |
289 | case PIN_CONFIG_DRIVE_PUSH_PULL: | |
290 | arg = pad->buffer_type == PMIC_GPIO_OUT_BUF_CMOS; | |
291 | break; | |
292 | case PIN_CONFIG_DRIVE_OPEN_DRAIN: | |
293 | arg = pad->buffer_type == PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS; | |
294 | break; | |
295 | case PIN_CONFIG_DRIVE_OPEN_SOURCE: | |
296 | arg = pad->buffer_type == PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS; | |
297 | break; | |
298 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
299 | arg = pad->pullup == PMIC_GPIO_PULL_DOWN; | |
300 | break; | |
301 | case PIN_CONFIG_BIAS_DISABLE: | |
302 | arg = pad->pullup = PMIC_GPIO_PULL_DISABLE; | |
303 | break; | |
304 | case PIN_CONFIG_BIAS_PULL_UP: | |
305 | arg = pad->pullup == PMIC_GPIO_PULL_UP_30; | |
306 | break; | |
307 | case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: | |
308 | arg = !pad->is_enabled; | |
309 | break; | |
310 | case PIN_CONFIG_POWER_SOURCE: | |
311 | arg = pad->power_source; | |
312 | break; | |
313 | case PIN_CONFIG_INPUT_ENABLE: | |
314 | arg = pad->input_enabled; | |
315 | break; | |
316 | case PIN_CONFIG_OUTPUT: | |
317 | arg = pad->out_value; | |
318 | break; | |
319 | case PMIC_GPIO_CONF_PULL_UP: | |
320 | arg = pad->pullup; | |
321 | break; | |
322 | case PMIC_GPIO_CONF_STRENGTH: | |
323 | arg = pad->strength; | |
324 | break; | |
325 | default: | |
326 | return -EINVAL; | |
327 | } | |
328 | ||
329 | *config = pinconf_to_config_packed(param, arg); | |
330 | return 0; | |
331 | } | |
332 | ||
333 | static int pmic_gpio_config_set(struct pinctrl_dev *pctldev, unsigned int pin, | |
334 | unsigned long *configs, unsigned nconfs) | |
335 | { | |
336 | struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev); | |
337 | struct pmic_gpio_pad *pad; | |
338 | unsigned param, arg; | |
339 | unsigned int val; | |
340 | int i, ret; | |
341 | ||
342 | pad = pctldev->desc->pins[pin].drv_data; | |
343 | ||
344 | for (i = 0; i < nconfs; i++) { | |
345 | param = pinconf_to_config_param(configs[i]); | |
346 | arg = pinconf_to_config_argument(configs[i]); | |
347 | ||
348 | switch (param) { | |
349 | case PIN_CONFIG_DRIVE_PUSH_PULL: | |
350 | pad->buffer_type = PMIC_GPIO_OUT_BUF_CMOS; | |
351 | break; | |
352 | case PIN_CONFIG_DRIVE_OPEN_DRAIN: | |
353 | if (!pad->have_buffer) | |
354 | return -EINVAL; | |
355 | pad->buffer_type = PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS; | |
356 | break; | |
357 | case PIN_CONFIG_DRIVE_OPEN_SOURCE: | |
358 | if (!pad->have_buffer) | |
359 | return -EINVAL; | |
360 | pad->buffer_type = PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS; | |
361 | break; | |
362 | case PIN_CONFIG_BIAS_DISABLE: | |
363 | pad->pullup = PMIC_GPIO_PULL_DISABLE; | |
364 | break; | |
365 | case PIN_CONFIG_BIAS_PULL_UP: | |
366 | pad->pullup = PMIC_GPIO_PULL_UP_30; | |
367 | break; | |
368 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
369 | if (arg) | |
370 | pad->pullup = PMIC_GPIO_PULL_DOWN; | |
371 | else | |
372 | pad->pullup = PMIC_GPIO_PULL_DISABLE; | |
373 | break; | |
374 | case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: | |
375 | pad->is_enabled = false; | |
376 | break; | |
377 | case PIN_CONFIG_POWER_SOURCE: | |
378 | if (arg > pad->num_sources) | |
379 | return -EINVAL; | |
380 | pad->power_source = arg; | |
381 | break; | |
382 | case PIN_CONFIG_INPUT_ENABLE: | |
383 | pad->input_enabled = arg ? true : false; | |
384 | break; | |
385 | case PIN_CONFIG_OUTPUT: | |
386 | pad->output_enabled = true; | |
387 | pad->out_value = arg; | |
388 | break; | |
389 | case PMIC_GPIO_CONF_PULL_UP: | |
390 | if (arg > PMIC_GPIO_PULL_UP_1P5_30) | |
391 | return -EINVAL; | |
392 | pad->pullup = arg; | |
393 | break; | |
394 | case PMIC_GPIO_CONF_STRENGTH: | |
395 | if (arg > PMIC_GPIO_STRENGTH_LOW) | |
396 | return -EINVAL; | |
397 | pad->strength = arg; | |
398 | break; | |
399 | default: | |
400 | return -EINVAL; | |
401 | } | |
402 | } | |
403 | ||
404 | val = pad->power_source << PMIC_GPIO_REG_VIN_SHIFT; | |
405 | ||
406 | ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_VIN_CTL, val); | |
407 | if (ret < 0) | |
408 | return ret; | |
409 | ||
410 | val = pad->pullup << PMIC_GPIO_REG_PULL_SHIFT; | |
411 | ||
412 | ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_PULL_CTL, val); | |
413 | if (ret < 0) | |
414 | return ret; | |
415 | ||
416 | val = pad->buffer_type << PMIC_GPIO_REG_OUT_TYPE_SHIFT; | |
982df6ae | 417 | val |= pad->strength << PMIC_GPIO_REG_OUT_STRENGTH_SHIFT; |
eadff302 II |
418 | |
419 | ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_OUT_CTL, val); | |
420 | if (ret < 0) | |
421 | return ret; | |
422 | ||
423 | val = 0; | |
424 | if (pad->output_enabled) { | |
425 | if (pad->input_enabled) | |
426 | val = 2; | |
427 | else | |
428 | val = 1; | |
429 | } | |
430 | ||
431 | val = val << PMIC_GPIO_REG_MODE_DIR_SHIFT; | |
432 | val |= pad->function << PMIC_GPIO_REG_MODE_FUNCTION_SHIFT; | |
433 | val |= pad->out_value & PMIC_GPIO_REG_MODE_VALUE_SHIFT; | |
434 | ||
435 | return pmic_gpio_write(state, pad, PMIC_GPIO_REG_MODE_CTL, val); | |
436 | } | |
437 | ||
438 | static void pmic_gpio_config_dbg_show(struct pinctrl_dev *pctldev, | |
439 | struct seq_file *s, unsigned pin) | |
440 | { | |
441 | struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev); | |
442 | struct pmic_gpio_pad *pad; | |
443 | int ret, val; | |
444 | ||
445 | static const char *const biases[] = { | |
446 | "pull-up 30uA", "pull-up 1.5uA", "pull-up 31.5uA", | |
447 | "pull-up 1.5uA + 30uA boost", "pull-down 10uA", "no pull" | |
448 | }; | |
449 | static const char *const buffer_types[] = { | |
450 | "push-pull", "open-drain", "open-source" | |
451 | }; | |
452 | static const char *const strengths[] = { | |
453 | "no", "high", "medium", "low" | |
454 | }; | |
455 | ||
456 | pad = pctldev->desc->pins[pin].drv_data; | |
457 | ||
458 | seq_printf(s, " gpio%-2d:", pin + PMIC_GPIO_PHYSICAL_OFFSET); | |
459 | ||
460 | val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_EN_CTL); | |
461 | ||
462 | if (val < 0 || !(val >> PMIC_GPIO_REG_MASTER_EN_SHIFT)) { | |
463 | seq_puts(s, " ---"); | |
464 | } else { | |
465 | ||
24a66618 | 466 | if (pad->input_enabled) { |
eadff302 | 467 | ret = pmic_gpio_read(state, pad, PMIC_MPP_REG_RT_STS); |
24a66618 II |
468 | if (ret < 0) |
469 | return; | |
470 | ||
471 | ret &= PMIC_MPP_REG_RT_STS_VAL_MASK; | |
472 | pad->out_value = ret; | |
eadff302 II |
473 | } |
474 | ||
475 | seq_printf(s, " %-4s", pad->output_enabled ? "out" : "in"); | |
476 | seq_printf(s, " %-7s", pmic_gpio_functions[pad->function]); | |
477 | seq_printf(s, " vin-%d", pad->power_source); | |
478 | seq_printf(s, " %-27s", biases[pad->pullup]); | |
479 | seq_printf(s, " %-10s", buffer_types[pad->buffer_type]); | |
480 | seq_printf(s, " %-4s", pad->out_value ? "high" : "low"); | |
481 | seq_printf(s, " %-7s", strengths[pad->strength]); | |
482 | } | |
483 | } | |
484 | ||
485 | static const struct pinconf_ops pmic_gpio_pinconf_ops = { | |
7382b623 | 486 | .is_generic = true, |
eadff302 II |
487 | .pin_config_group_get = pmic_gpio_config_get, |
488 | .pin_config_group_set = pmic_gpio_config_set, | |
489 | .pin_config_group_dbg_show = pmic_gpio_config_dbg_show, | |
490 | }; | |
491 | ||
492 | static int pmic_gpio_direction_input(struct gpio_chip *chip, unsigned pin) | |
493 | { | |
c52d9df1 | 494 | struct pmic_gpio_state *state = gpiochip_get_data(chip); |
eadff302 II |
495 | unsigned long config; |
496 | ||
497 | config = pinconf_to_config_packed(PIN_CONFIG_INPUT_ENABLE, 1); | |
498 | ||
499 | return pmic_gpio_config_set(state->ctrl, pin, &config, 1); | |
500 | } | |
501 | ||
502 | static int pmic_gpio_direction_output(struct gpio_chip *chip, | |
503 | unsigned pin, int val) | |
504 | { | |
c52d9df1 | 505 | struct pmic_gpio_state *state = gpiochip_get_data(chip); |
eadff302 II |
506 | unsigned long config; |
507 | ||
508 | config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, val); | |
509 | ||
510 | return pmic_gpio_config_set(state->ctrl, pin, &config, 1); | |
511 | } | |
512 | ||
513 | static int pmic_gpio_get(struct gpio_chip *chip, unsigned pin) | |
514 | { | |
c52d9df1 | 515 | struct pmic_gpio_state *state = gpiochip_get_data(chip); |
eadff302 II |
516 | struct pmic_gpio_pad *pad; |
517 | int ret; | |
518 | ||
519 | pad = state->ctrl->desc->pins[pin].drv_data; | |
520 | ||
521 | if (!pad->is_enabled) | |
522 | return -EINVAL; | |
523 | ||
524 | if (pad->input_enabled) { | |
525 | ret = pmic_gpio_read(state, pad, PMIC_MPP_REG_RT_STS); | |
526 | if (ret < 0) | |
527 | return ret; | |
528 | ||
529 | pad->out_value = ret & PMIC_MPP_REG_RT_STS_VAL_MASK; | |
530 | } | |
531 | ||
86c1a219 | 532 | return !!pad->out_value; |
eadff302 II |
533 | } |
534 | ||
535 | static void pmic_gpio_set(struct gpio_chip *chip, unsigned pin, int value) | |
536 | { | |
c52d9df1 | 537 | struct pmic_gpio_state *state = gpiochip_get_data(chip); |
eadff302 II |
538 | unsigned long config; |
539 | ||
540 | config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, value); | |
541 | ||
542 | pmic_gpio_config_set(state->ctrl, pin, &config, 1); | |
543 | } | |
544 | ||
eadff302 II |
545 | static int pmic_gpio_of_xlate(struct gpio_chip *chip, |
546 | const struct of_phandle_args *gpio_desc, | |
547 | u32 *flags) | |
548 | { | |
549 | if (chip->of_gpio_n_cells < 2) | |
550 | return -EINVAL; | |
551 | ||
552 | if (flags) | |
553 | *flags = gpio_desc->args[1]; | |
554 | ||
555 | return gpio_desc->args[0] - PMIC_GPIO_PHYSICAL_OFFSET; | |
556 | } | |
557 | ||
558 | static int pmic_gpio_to_irq(struct gpio_chip *chip, unsigned pin) | |
559 | { | |
c52d9df1 | 560 | struct pmic_gpio_state *state = gpiochip_get_data(chip); |
eadff302 II |
561 | struct pmic_gpio_pad *pad; |
562 | ||
563 | pad = state->ctrl->desc->pins[pin].drv_data; | |
564 | ||
565 | return pad->irq; | |
566 | } | |
567 | ||
568 | static void pmic_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) | |
569 | { | |
c52d9df1 | 570 | struct pmic_gpio_state *state = gpiochip_get_data(chip); |
eadff302 II |
571 | unsigned i; |
572 | ||
573 | for (i = 0; i < chip->ngpio; i++) { | |
574 | pmic_gpio_config_dbg_show(state->ctrl, s, i); | |
575 | seq_puts(s, "\n"); | |
576 | } | |
577 | } | |
578 | ||
579 | static const struct gpio_chip pmic_gpio_gpio_template = { | |
580 | .direction_input = pmic_gpio_direction_input, | |
581 | .direction_output = pmic_gpio_direction_output, | |
582 | .get = pmic_gpio_get, | |
583 | .set = pmic_gpio_set, | |
98c85d58 JG |
584 | .request = gpiochip_generic_request, |
585 | .free = gpiochip_generic_free, | |
eadff302 II |
586 | .of_xlate = pmic_gpio_of_xlate, |
587 | .to_irq = pmic_gpio_to_irq, | |
588 | .dbg_show = pmic_gpio_dbg_show, | |
589 | }; | |
590 | ||
591 | static int pmic_gpio_populate(struct pmic_gpio_state *state, | |
592 | struct pmic_gpio_pad *pad) | |
593 | { | |
594 | int type, subtype, val, dir; | |
595 | ||
596 | type = pmic_gpio_read(state, pad, PMIC_GPIO_REG_TYPE); | |
597 | if (type < 0) | |
598 | return type; | |
599 | ||
600 | if (type != PMIC_GPIO_TYPE) { | |
601 | dev_err(state->dev, "incorrect block type 0x%x at 0x%x\n", | |
602 | type, pad->base); | |
603 | return -ENODEV; | |
604 | } | |
605 | ||
606 | subtype = pmic_gpio_read(state, pad, PMIC_GPIO_REG_SUBTYPE); | |
607 | if (subtype < 0) | |
608 | return subtype; | |
609 | ||
610 | switch (subtype) { | |
611 | case PMIC_GPIO_SUBTYPE_GPIO_4CH: | |
612 | pad->have_buffer = true; | |
613 | case PMIC_GPIO_SUBTYPE_GPIOC_4CH: | |
614 | pad->num_sources = 4; | |
615 | break; | |
616 | case PMIC_GPIO_SUBTYPE_GPIO_8CH: | |
617 | pad->have_buffer = true; | |
618 | case PMIC_GPIO_SUBTYPE_GPIOC_8CH: | |
619 | pad->num_sources = 8; | |
620 | break; | |
621 | default: | |
622 | dev_err(state->dev, "unknown GPIO type 0x%x\n", subtype); | |
623 | return -ENODEV; | |
624 | } | |
625 | ||
626 | val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_MODE_CTL); | |
627 | if (val < 0) | |
628 | return val; | |
629 | ||
630 | pad->out_value = val & PMIC_GPIO_REG_MODE_VALUE_SHIFT; | |
631 | ||
632 | dir = val >> PMIC_GPIO_REG_MODE_DIR_SHIFT; | |
633 | dir &= PMIC_GPIO_REG_MODE_DIR_MASK; | |
634 | switch (dir) { | |
635 | case 0: | |
636 | pad->input_enabled = true; | |
637 | pad->output_enabled = false; | |
638 | break; | |
639 | case 1: | |
640 | pad->input_enabled = false; | |
641 | pad->output_enabled = true; | |
642 | break; | |
643 | case 2: | |
644 | pad->input_enabled = true; | |
645 | pad->output_enabled = true; | |
646 | break; | |
647 | default: | |
648 | dev_err(state->dev, "unknown GPIO direction\n"); | |
649 | return -ENODEV; | |
650 | } | |
651 | ||
652 | pad->function = val >> PMIC_GPIO_REG_MODE_FUNCTION_SHIFT; | |
653 | pad->function &= PMIC_GPIO_REG_MODE_FUNCTION_MASK; | |
654 | ||
655 | val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_VIN_CTL); | |
656 | if (val < 0) | |
657 | return val; | |
658 | ||
659 | pad->power_source = val >> PMIC_GPIO_REG_VIN_SHIFT; | |
660 | pad->power_source &= PMIC_GPIO_REG_VIN_MASK; | |
661 | ||
662 | val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_PULL_CTL); | |
663 | if (val < 0) | |
664 | return val; | |
665 | ||
666 | pad->pullup = val >> PMIC_GPIO_REG_PULL_SHIFT; | |
667 | pad->pullup &= PMIC_GPIO_REG_PULL_MASK; | |
668 | ||
669 | val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_OUT_CTL); | |
670 | if (val < 0) | |
671 | return val; | |
672 | ||
673 | pad->strength = val >> PMIC_GPIO_REG_OUT_STRENGTH_SHIFT; | |
674 | pad->strength &= PMIC_GPIO_REG_OUT_STRENGTH_MASK; | |
675 | ||
676 | pad->buffer_type = val >> PMIC_GPIO_REG_OUT_TYPE_SHIFT; | |
677 | pad->buffer_type &= PMIC_GPIO_REG_OUT_TYPE_MASK; | |
678 | ||
679 | /* Pin could be disabled with PIN_CONFIG_BIAS_HIGH_IMPEDANCE */ | |
680 | pad->is_enabled = true; | |
681 | return 0; | |
682 | } | |
683 | ||
684 | static int pmic_gpio_probe(struct platform_device *pdev) | |
685 | { | |
686 | struct device *dev = &pdev->dev; | |
687 | struct pinctrl_pin_desc *pindesc; | |
688 | struct pinctrl_desc *pctrldesc; | |
689 | struct pmic_gpio_pad *pad, *pads; | |
690 | struct pmic_gpio_state *state; | |
691 | int ret, npins, i; | |
ab4256cf | 692 | u32 reg; |
eadff302 | 693 | |
ab4256cf | 694 | ret = of_property_read_u32(dev->of_node, "reg", ®); |
eadff302 | 695 | if (ret < 0) { |
ab4256cf | 696 | dev_err(dev, "missing base address"); |
eadff302 II |
697 | return ret; |
698 | } | |
699 | ||
a5ea13f0 | 700 | npins = platform_irq_count(pdev); |
eadff302 II |
701 | if (!npins) |
702 | return -EINVAL; | |
a5ea13f0 SB |
703 | if (npins < 0) |
704 | return npins; | |
eadff302 II |
705 | |
706 | BUG_ON(npins > ARRAY_SIZE(pmic_gpio_groups)); | |
707 | ||
708 | state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL); | |
709 | if (!state) | |
710 | return -ENOMEM; | |
711 | ||
712 | platform_set_drvdata(pdev, state); | |
713 | ||
714 | state->dev = &pdev->dev; | |
715 | state->map = dev_get_regmap(dev->parent, NULL); | |
716 | ||
717 | pindesc = devm_kcalloc(dev, npins, sizeof(*pindesc), GFP_KERNEL); | |
718 | if (!pindesc) | |
719 | return -ENOMEM; | |
720 | ||
721 | pads = devm_kcalloc(dev, npins, sizeof(*pads), GFP_KERNEL); | |
722 | if (!pads) | |
723 | return -ENOMEM; | |
724 | ||
725 | pctrldesc = devm_kzalloc(dev, sizeof(*pctrldesc), GFP_KERNEL); | |
726 | if (!pctrldesc) | |
727 | return -ENOMEM; | |
728 | ||
729 | pctrldesc->pctlops = &pmic_gpio_pinctrl_ops; | |
730 | pctrldesc->pmxops = &pmic_gpio_pinmux_ops; | |
731 | pctrldesc->confops = &pmic_gpio_pinconf_ops; | |
732 | pctrldesc->owner = THIS_MODULE; | |
733 | pctrldesc->name = dev_name(dev); | |
734 | pctrldesc->pins = pindesc; | |
735 | pctrldesc->npins = npins; | |
f684e4ac LW |
736 | pctrldesc->num_custom_params = ARRAY_SIZE(pmic_gpio_bindings); |
737 | pctrldesc->custom_params = pmic_gpio_bindings; | |
4f06266a | 738 | #ifdef CONFIG_DEBUG_FS |
f684e4ac | 739 | pctrldesc->custom_conf_items = pmic_conf_items; |
4f06266a | 740 | #endif |
eadff302 II |
741 | |
742 | for (i = 0; i < npins; i++, pindesc++) { | |
743 | pad = &pads[i]; | |
744 | pindesc->drv_data = pad; | |
745 | pindesc->number = i; | |
746 | pindesc->name = pmic_gpio_groups[i]; | |
747 | ||
748 | pad->irq = platform_get_irq(pdev, i); | |
749 | if (pad->irq < 0) | |
750 | return pad->irq; | |
751 | ||
ab4256cf | 752 | pad->base = reg + i * PMIC_GPIO_ADDRESS_RANGE; |
eadff302 II |
753 | |
754 | ret = pmic_gpio_populate(state, pad); | |
755 | if (ret < 0) | |
756 | return ret; | |
757 | } | |
758 | ||
759 | state->chip = pmic_gpio_gpio_template; | |
58383c78 | 760 | state->chip.parent = dev; |
eadff302 II |
761 | state->chip.base = -1; |
762 | state->chip.ngpio = npins; | |
763 | state->chip.label = dev_name(dev); | |
764 | state->chip.of_gpio_n_cells = 2; | |
765 | state->chip.can_sleep = false; | |
766 | ||
b46ddfe6 | 767 | state->ctrl = devm_pinctrl_register(dev, pctrldesc, state); |
323de9ef MY |
768 | if (IS_ERR(state->ctrl)) |
769 | return PTR_ERR(state->ctrl); | |
eadff302 | 770 | |
c52d9df1 | 771 | ret = gpiochip_add_data(&state->chip, state); |
eadff302 II |
772 | if (ret) { |
773 | dev_err(state->dev, "can't add gpio chip\n"); | |
b46ddfe6 | 774 | return ret; |
eadff302 II |
775 | } |
776 | ||
777 | ret = gpiochip_add_pin_range(&state->chip, dev_name(dev), 0, 0, npins); | |
778 | if (ret) { | |
779 | dev_err(dev, "failed to add pin range\n"); | |
780 | goto err_range; | |
781 | } | |
782 | ||
783 | return 0; | |
784 | ||
785 | err_range: | |
786 | gpiochip_remove(&state->chip); | |
eadff302 II |
787 | return ret; |
788 | } | |
789 | ||
790 | static int pmic_gpio_remove(struct platform_device *pdev) | |
791 | { | |
792 | struct pmic_gpio_state *state = platform_get_drvdata(pdev); | |
793 | ||
794 | gpiochip_remove(&state->chip); | |
eadff302 II |
795 | return 0; |
796 | } | |
797 | ||
798 | static const struct of_device_id pmic_gpio_of_match[] = { | |
7414b099 | 799 | { .compatible = "qcom,pm8916-gpio" }, /* 4 GPIO's */ |
eadff302 | 800 | { .compatible = "qcom,pm8941-gpio" }, /* 36 GPIO's */ |
016c2f4d | 801 | { .compatible = "qcom,pm8994-gpio" }, /* 22 GPIO's */ |
eadff302 | 802 | { .compatible = "qcom,pma8084-gpio" }, /* 22 GPIO's */ |
647dbd1e | 803 | { .compatible = "qcom,spmi-gpio" }, /* Generic */ |
eadff302 II |
804 | { }, |
805 | }; | |
806 | ||
807 | MODULE_DEVICE_TABLE(of, pmic_gpio_of_match); | |
808 | ||
809 | static struct platform_driver pmic_gpio_driver = { | |
810 | .driver = { | |
811 | .name = "qcom-spmi-gpio", | |
812 | .of_match_table = pmic_gpio_of_match, | |
813 | }, | |
814 | .probe = pmic_gpio_probe, | |
815 | .remove = pmic_gpio_remove, | |
816 | }; | |
817 | ||
818 | module_platform_driver(pmic_gpio_driver); | |
819 | ||
820 | MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>"); | |
821 | MODULE_DESCRIPTION("Qualcomm SPMI PMIC GPIO pin control driver"); | |
822 | MODULE_ALIAS("platform:qcom-spmi-gpio"); | |
823 | MODULE_LICENSE("GPL v2"); |