1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
4 */
5
6 #include <linux/gpio/driver.h>
7 #include <linux/module.h>
8 #include <linux/of.h>
9 #include <linux/of_irq.h>
10 #include <linux/pinctrl/pinconf-generic.h>
11 #include <linux/pinctrl/pinconf.h>
12 #include <linux/pinctrl/pinmux.h>
13 #include <linux/platform_device.h>
14 #include <linux/regmap.h>
15 #include <linux/slab.h>
16 #include <linux/types.h>
17
18 #include <dt-bindings/pinctrl/qcom,pmic-mpp.h>
19
20 #include "../core.h"
21 #include "../pinctrl-utils.h"
22
23 #define PMIC_MPP_ADDRESS_RANGE 0x100
24
25 /*
26 * Pull Up Values - it indicates whether a pull-up should be
27 * applied for bidirectional mode only. The hardware ignores the
28 * configuration when operating in other modes.
29 */
30 #define PMIC_MPP_PULL_UP_0P6KOHM 0
31 #define PMIC_MPP_PULL_UP_10KOHM 1
32 #define PMIC_MPP_PULL_UP_30KOHM 2
33 #define PMIC_MPP_PULL_UP_OPEN 3
34
35 /* type registers base address bases */
36 #define PMIC_MPP_REG_TYPE 0x4
37 #define PMIC_MPP_REG_SUBTYPE 0x5
38
39 /* mpp peripheral type and subtype values */
40 #define PMIC_MPP_TYPE 0x11
41 #define PMIC_MPP_SUBTYPE_4CH_NO_ANA_OUT 0x3
42 #define PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT 0x4
43 #define PMIC_MPP_SUBTYPE_4CH_NO_SINK 0x5
44 #define PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK 0x6
45 #define PMIC_MPP_SUBTYPE_4CH_FULL_FUNC 0x7
46 #define PMIC_MPP_SUBTYPE_8CH_FULL_FUNC 0xf
47
48 #define PMIC_MPP_REG_RT_STS 0x10
49 #define PMIC_MPP_REG_RT_STS_VAL_MASK 0x1
50
51 /* control register base address bases */
52 #define PMIC_MPP_REG_MODE_CTL 0x40
53 #define PMIC_MPP_REG_DIG_VIN_CTL 0x41
54 #define PMIC_MPP_REG_DIG_PULL_CTL 0x42
55 #define PMIC_MPP_REG_DIG_IN_CTL 0x43
56 #define PMIC_MPP_REG_EN_CTL 0x46
57 #define PMIC_MPP_REG_AOUT_CTL 0x48
58 #define PMIC_MPP_REG_AIN_CTL 0x4a
59 #define PMIC_MPP_REG_SINK_CTL 0x4c
60
61 /* PMIC_MPP_REG_MODE_CTL */
62 #define PMIC_MPP_REG_MODE_VALUE_MASK 0x1
63 #define PMIC_MPP_REG_MODE_FUNCTION_SHIFT 1
64 #define PMIC_MPP_REG_MODE_FUNCTION_MASK 0x7
65 #define PMIC_MPP_REG_MODE_DIR_SHIFT 4
66 #define PMIC_MPP_REG_MODE_DIR_MASK 0x7
67
68 /* PMIC_MPP_REG_DIG_VIN_CTL */
69 #define PMIC_MPP_REG_VIN_SHIFT 0
70 #define PMIC_MPP_REG_VIN_MASK 0x7
71
72 /* PMIC_MPP_REG_DIG_PULL_CTL */
73 #define PMIC_MPP_REG_PULL_SHIFT 0
74 #define PMIC_MPP_REG_PULL_MASK 0x7
75
76 /* PMIC_MPP_REG_EN_CTL */
77 #define PMIC_MPP_REG_MASTER_EN_SHIFT 7
78
79 /* PMIC_MPP_REG_AIN_CTL */
80 #define PMIC_MPP_REG_AIN_ROUTE_SHIFT 0
81 #define PMIC_MPP_REG_AIN_ROUTE_MASK 0x7
82
83 #define PMIC_MPP_MODE_DIGITAL_INPUT 0
84 #define PMIC_MPP_MODE_DIGITAL_OUTPUT 1
85 #define PMIC_MPP_MODE_DIGITAL_BIDIR 2
86 #define PMIC_MPP_MODE_ANALOG_BIDIR 3
87 #define PMIC_MPP_MODE_ANALOG_INPUT 4
88 #define PMIC_MPP_MODE_ANALOG_OUTPUT 5
89 #define PMIC_MPP_MODE_CURRENT_SINK 6
90
91 #define PMIC_MPP_SELECTOR_NORMAL 0
92 #define PMIC_MPP_SELECTOR_PAIRED 1
93 #define PMIC_MPP_SELECTOR_DTEST_FIRST 4
94
95 #define PMIC_MPP_PHYSICAL_OFFSET 1
96
97 /* Qualcomm specific pin configurations */
98 #define PMIC_MPP_CONF_AMUX_ROUTE (PIN_CONFIG_END + 1)
99 #define PMIC_MPP_CONF_ANALOG_LEVEL (PIN_CONFIG_END + 2)
100 #define PMIC_MPP_CONF_DTEST_SELECTOR (PIN_CONFIG_END + 3)
101 #define PMIC_MPP_CONF_PAIRED (PIN_CONFIG_END + 4)
102
103 /**
104 * struct pmic_mpp_pad - keep current MPP settings
105 * @base: Address base in SPMI device.
106 * @is_enabled: Set to false when MPP should be put in high Z state.
107 * @out_value: Cached pin output value.
108 * @output_enabled: Set to true if MPP output logic is enabled.
109 * @input_enabled: Set to true if MPP input buffer logic is enabled.
110 * @paired: Pin operates in paired mode
111 * @has_pullup: Pin has support to configure pullup
112 * @num_sources: Number of power-sources supported by this MPP.
113 * @power_source: Current power-source used.
114 * @amux_input: Set the source for analog input.
115 * @aout_level: Analog output level
116 * @pullup: Pullup resistor value. Valid in Bidirectional mode only.
117 * @function: See pmic_mpp_functions[].
118 * @drive_strength: Amount of current in sink mode
119 * @dtest: DTEST route selector
120 */
121 struct pmic_mpp_pad {
122 u16 base;
123 bool is_enabled;
124 bool out_value;
125 bool output_enabled;
126 bool input_enabled;
127 bool paired;
128 bool has_pullup;
129 unsigned int num_sources;
130 unsigned int power_source;
131 unsigned int amux_input;
132 unsigned int aout_level;
133 unsigned int pullup;
134 unsigned int function;
135 unsigned int drive_strength;
136 unsigned int dtest;
137 };
138
139 struct pmic_mpp_state {
140 struct device *dev;
141 struct regmap *map;
142 struct pinctrl_dev *ctrl;
143 struct gpio_chip chip;
144 struct irq_chip irq;
145 };
146
147 static const struct pinconf_generic_params pmic_mpp_bindings[] = {
148 {"qcom,amux-route", PMIC_MPP_CONF_AMUX_ROUTE, 0},
149 {"qcom,analog-level", PMIC_MPP_CONF_ANALOG_LEVEL, 0},
150 {"qcom,dtest", PMIC_MPP_CONF_DTEST_SELECTOR, 0},
151 {"qcom,paired", PMIC_MPP_CONF_PAIRED, 0},
152 };
153
154 #ifdef CONFIG_DEBUG_FS
155 static const struct pin_config_item pmic_conf_items[] = {
156 PCONFDUMP(PMIC_MPP_CONF_AMUX_ROUTE, "analog mux", NULL, true),
157 PCONFDUMP(PMIC_MPP_CONF_ANALOG_LEVEL, "analog level", NULL, true),
158 PCONFDUMP(PMIC_MPP_CONF_DTEST_SELECTOR, "dtest", NULL, true),
159 PCONFDUMP(PMIC_MPP_CONF_PAIRED, "paired", NULL, false),
160 };
161 #endif
162
163 static const char *const pmic_mpp_groups[] = {
164 "mpp1", "mpp2", "mpp3", "mpp4", "mpp5", "mpp6", "mpp7", "mpp8",
165 };
166
167 #define PMIC_MPP_DIGITAL 0
168 #define PMIC_MPP_ANALOG 1
169 #define PMIC_MPP_SINK 2
170
171 static const char *const pmic_mpp_functions[] = {
172 "digital", "analog", "sink"
173 };
174
pmic_mpp_read(struct pmic_mpp_state * state,struct pmic_mpp_pad * pad,unsigned int addr)175 static int pmic_mpp_read(struct pmic_mpp_state *state,
176 struct pmic_mpp_pad *pad, unsigned int addr)
177 {
178 unsigned int val;
179 int ret;
180
181 ret = regmap_read(state->map, pad->base + addr, &val);
182 if (ret < 0)
183 dev_err(state->dev, "read 0x%x failed\n", addr);
184 else
185 ret = val;
186
187 return ret;
188 }
189
pmic_mpp_write(struct pmic_mpp_state * state,struct pmic_mpp_pad * pad,unsigned int addr,unsigned int val)190 static int pmic_mpp_write(struct pmic_mpp_state *state,
191 struct pmic_mpp_pad *pad, unsigned int addr,
192 unsigned int val)
193 {
194 int ret;
195
196 ret = regmap_write(state->map, pad->base + addr, val);
197 if (ret < 0)
198 dev_err(state->dev, "write 0x%x failed\n", addr);
199
200 return ret;
201 }
202
pmic_mpp_get_groups_count(struct pinctrl_dev * pctldev)203 static int pmic_mpp_get_groups_count(struct pinctrl_dev *pctldev)
204 {
205 /* Every PIN is a group */
206 return pctldev->desc->npins;
207 }
208
pmic_mpp_get_group_name(struct pinctrl_dev * pctldev,unsigned pin)209 static const char *pmic_mpp_get_group_name(struct pinctrl_dev *pctldev,
210 unsigned pin)
211 {
212 return pctldev->desc->pins[pin].name;
213 }
214
pmic_mpp_get_group_pins(struct pinctrl_dev * pctldev,unsigned pin,const unsigned ** pins,unsigned * num_pins)215 static int pmic_mpp_get_group_pins(struct pinctrl_dev *pctldev,
216 unsigned pin,
217 const unsigned **pins, unsigned *num_pins)
218 {
219 *pins = &pctldev->desc->pins[pin].number;
220 *num_pins = 1;
221 return 0;
222 }
223
224 static const struct pinctrl_ops pmic_mpp_pinctrl_ops = {
225 .get_groups_count = pmic_mpp_get_groups_count,
226 .get_group_name = pmic_mpp_get_group_name,
227 .get_group_pins = pmic_mpp_get_group_pins,
228 .dt_node_to_map = pinconf_generic_dt_node_to_map_group,
229 .dt_free_map = pinctrl_utils_free_map,
230 };
231
pmic_mpp_get_functions_count(struct pinctrl_dev * pctldev)232 static int pmic_mpp_get_functions_count(struct pinctrl_dev *pctldev)
233 {
234 return ARRAY_SIZE(pmic_mpp_functions);
235 }
236
pmic_mpp_get_function_name(struct pinctrl_dev * pctldev,unsigned function)237 static const char *pmic_mpp_get_function_name(struct pinctrl_dev *pctldev,
238 unsigned function)
239 {
240 return pmic_mpp_functions[function];
241 }
242
pmic_mpp_get_function_groups(struct pinctrl_dev * pctldev,unsigned function,const char * const ** groups,unsigned * const num_qgroups)243 static int pmic_mpp_get_function_groups(struct pinctrl_dev *pctldev,
244 unsigned function,
245 const char *const **groups,
246 unsigned *const num_qgroups)
247 {
248 *groups = pmic_mpp_groups;
249 *num_qgroups = pctldev->desc->npins;
250 return 0;
251 }
252
pmic_mpp_write_mode_ctl(struct pmic_mpp_state * state,struct pmic_mpp_pad * pad)253 static int pmic_mpp_write_mode_ctl(struct pmic_mpp_state *state,
254 struct pmic_mpp_pad *pad)
255 {
256 unsigned int mode;
257 unsigned int sel;
258 unsigned int val;
259 unsigned int en;
260
261 switch (pad->function) {
262 case PMIC_MPP_ANALOG:
263 if (pad->input_enabled && pad->output_enabled)
264 mode = PMIC_MPP_MODE_ANALOG_BIDIR;
265 else if (pad->input_enabled)
266 mode = PMIC_MPP_MODE_ANALOG_INPUT;
267 else
268 mode = PMIC_MPP_MODE_ANALOG_OUTPUT;
269 break;
270 case PMIC_MPP_DIGITAL:
271 if (pad->input_enabled && pad->output_enabled)
272 mode = PMIC_MPP_MODE_DIGITAL_BIDIR;
273 else if (pad->input_enabled)
274 mode = PMIC_MPP_MODE_DIGITAL_INPUT;
275 else
276 mode = PMIC_MPP_MODE_DIGITAL_OUTPUT;
277 break;
278 case PMIC_MPP_SINK:
279 default:
280 mode = PMIC_MPP_MODE_CURRENT_SINK;
281 break;
282 }
283
284 if (pad->dtest)
285 sel = PMIC_MPP_SELECTOR_DTEST_FIRST + pad->dtest - 1;
286 else if (pad->paired)
287 sel = PMIC_MPP_SELECTOR_PAIRED;
288 else
289 sel = PMIC_MPP_SELECTOR_NORMAL;
290
291 en = !!pad->out_value;
292
293 val = mode << PMIC_MPP_REG_MODE_DIR_SHIFT |
294 sel << PMIC_MPP_REG_MODE_FUNCTION_SHIFT |
295 en;
296
297 return pmic_mpp_write(state, pad, PMIC_MPP_REG_MODE_CTL, val);
298 }
299
pmic_mpp_set_mux(struct pinctrl_dev * pctldev,unsigned function,unsigned pin)300 static int pmic_mpp_set_mux(struct pinctrl_dev *pctldev, unsigned function,
301 unsigned pin)
302 {
303 struct pmic_mpp_state *state = pinctrl_dev_get_drvdata(pctldev);
304 struct pmic_mpp_pad *pad;
305 unsigned int val;
306 int ret;
307
308 pad = pctldev->desc->pins[pin].drv_data;
309
310 pad->function = function;
311
312 ret = pmic_mpp_write_mode_ctl(state, pad);
313 if (ret < 0)
314 return ret;
315
316 val = pad->is_enabled << PMIC_MPP_REG_MASTER_EN_SHIFT;
317
318 return pmic_mpp_write(state, pad, PMIC_MPP_REG_EN_CTL, val);
319 }
320
321 static const struct pinmux_ops pmic_mpp_pinmux_ops = {
322 .get_functions_count = pmic_mpp_get_functions_count,
323 .get_function_name = pmic_mpp_get_function_name,
324 .get_function_groups = pmic_mpp_get_function_groups,
325 .set_mux = pmic_mpp_set_mux,
326 };
327
pmic_mpp_config_get(struct pinctrl_dev * pctldev,unsigned int pin,unsigned long * config)328 static int pmic_mpp_config_get(struct pinctrl_dev *pctldev,
329 unsigned int pin, unsigned long *config)
330 {
331 unsigned param = pinconf_to_config_param(*config);
332 struct pmic_mpp_pad *pad;
333 unsigned arg = 0;
334
335 pad = pctldev->desc->pins[pin].drv_data;
336
337 switch (param) {
338 case PIN_CONFIG_BIAS_DISABLE:
339 if (pad->pullup != PMIC_MPP_PULL_UP_OPEN)
340 return -EINVAL;
341 arg = 1;
342 break;
343 case PIN_CONFIG_BIAS_PULL_UP:
344 switch (pad->pullup) {
345 case PMIC_MPP_PULL_UP_0P6KOHM:
346 arg = 600;
347 break;
348 case PMIC_MPP_PULL_UP_10KOHM:
349 arg = 10000;
350 break;
351 case PMIC_MPP_PULL_UP_30KOHM:
352 arg = 30000;
353 break;
354 default:
355 return -EINVAL;
356 }
357 break;
358 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
359 if (pad->is_enabled)
360 return -EINVAL;
361 arg = 1;
362 break;
363 case PIN_CONFIG_POWER_SOURCE:
364 arg = pad->power_source;
365 break;
366 case PIN_CONFIG_INPUT_ENABLE:
367 if (!pad->input_enabled)
368 return -EINVAL;
369 arg = 1;
370 break;
371 case PIN_CONFIG_OUTPUT:
372 arg = pad->out_value;
373 break;
374 case PMIC_MPP_CONF_DTEST_SELECTOR:
375 arg = pad->dtest;
376 break;
377 case PMIC_MPP_CONF_AMUX_ROUTE:
378 arg = pad->amux_input;
379 break;
380 case PMIC_MPP_CONF_PAIRED:
381 if (!pad->paired)
382 return -EINVAL;
383 arg = 1;
384 break;
385 case PIN_CONFIG_DRIVE_STRENGTH:
386 arg = pad->drive_strength;
387 break;
388 case PMIC_MPP_CONF_ANALOG_LEVEL:
389 arg = pad->aout_level;
390 break;
391 default:
392 return -EINVAL;
393 }
394
395 /* Convert register value to pinconf value */
396 *config = pinconf_to_config_packed(param, arg);
397 return 0;
398 }
399
pmic_mpp_config_set(struct pinctrl_dev * pctldev,unsigned int pin,unsigned long * configs,unsigned nconfs)400 static int pmic_mpp_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
401 unsigned long *configs, unsigned nconfs)
402 {
403 struct pmic_mpp_state *state = pinctrl_dev_get_drvdata(pctldev);
404 struct pmic_mpp_pad *pad;
405 unsigned param, arg;
406 unsigned int val;
407 int i, ret;
408
409 pad = pctldev->desc->pins[pin].drv_data;
410
411 /* Make it possible to enable the pin, by not setting high impedance */
412 pad->is_enabled = true;
413
414 for (i = 0; i < nconfs; i++) {
415 param = pinconf_to_config_param(configs[i]);
416 arg = pinconf_to_config_argument(configs[i]);
417
418 switch (param) {
419 case PIN_CONFIG_BIAS_DISABLE:
420 pad->pullup = PMIC_MPP_PULL_UP_OPEN;
421 break;
422 case PIN_CONFIG_BIAS_PULL_UP:
423 switch (arg) {
424 case 600:
425 pad->pullup = PMIC_MPP_PULL_UP_0P6KOHM;
426 break;
427 case 10000:
428 pad->pullup = PMIC_MPP_PULL_UP_10KOHM;
429 break;
430 case 30000:
431 pad->pullup = PMIC_MPP_PULL_UP_30KOHM;
432 break;
433 default:
434 return -EINVAL;
435 }
436 break;
437 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
438 pad->is_enabled = false;
439 break;
440 case PIN_CONFIG_POWER_SOURCE:
441 if (arg >= pad->num_sources)
442 return -EINVAL;
443 pad->power_source = arg;
444 break;
445 case PIN_CONFIG_INPUT_ENABLE:
446 pad->input_enabled = arg ? true : false;
447 break;
448 case PIN_CONFIG_OUTPUT:
449 pad->output_enabled = true;
450 pad->out_value = arg;
451 break;
452 case PMIC_MPP_CONF_DTEST_SELECTOR:
453 pad->dtest = arg;
454 break;
455 case PIN_CONFIG_DRIVE_STRENGTH:
456 pad->drive_strength = arg;
457 break;
458 case PMIC_MPP_CONF_AMUX_ROUTE:
459 if (arg >= PMIC_MPP_AMUX_ROUTE_ABUS4)
460 return -EINVAL;
461 pad->amux_input = arg;
462 break;
463 case PMIC_MPP_CONF_ANALOG_LEVEL:
464 pad->aout_level = arg;
465 break;
466 case PMIC_MPP_CONF_PAIRED:
467 pad->paired = !!arg;
468 break;
469 default:
470 return -EINVAL;
471 }
472 }
473
474 val = pad->power_source << PMIC_MPP_REG_VIN_SHIFT;
475
476 ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_DIG_VIN_CTL, val);
477 if (ret < 0)
478 return ret;
479
480 if (pad->has_pullup) {
481 val = pad->pullup << PMIC_MPP_REG_PULL_SHIFT;
482
483 ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_DIG_PULL_CTL,
484 val);
485 if (ret < 0)
486 return ret;
487 }
488
489 val = pad->amux_input & PMIC_MPP_REG_AIN_ROUTE_MASK;
490
491 ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_AIN_CTL, val);
492 if (ret < 0)
493 return ret;
494
495 ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_AOUT_CTL, pad->aout_level);
496 if (ret < 0)
497 return ret;
498
499 ret = pmic_mpp_write_mode_ctl(state, pad);
500 if (ret < 0)
501 return ret;
502
503 ret = pmic_mpp_write(state, pad, PMIC_MPP_REG_SINK_CTL, pad->drive_strength);
504 if (ret < 0)
505 return ret;
506
507 val = pad->is_enabled << PMIC_MPP_REG_MASTER_EN_SHIFT;
508
509 return pmic_mpp_write(state, pad, PMIC_MPP_REG_EN_CTL, val);
510 }
511
pmic_mpp_config_dbg_show(struct pinctrl_dev * pctldev,struct seq_file * s,unsigned pin)512 static void pmic_mpp_config_dbg_show(struct pinctrl_dev *pctldev,
513 struct seq_file *s, unsigned pin)
514 {
515 struct pmic_mpp_state *state = pinctrl_dev_get_drvdata(pctldev);
516 struct pmic_mpp_pad *pad;
517 int ret;
518
519 static const char *const biases[] = {
520 "0.6kOhm", "10kOhm", "30kOhm", "Disabled"
521 };
522
523 pad = pctldev->desc->pins[pin].drv_data;
524
525 seq_printf(s, " mpp%-2d:", pin + PMIC_MPP_PHYSICAL_OFFSET);
526
527 if (!pad->is_enabled) {
528 seq_puts(s, " ---");
529 } else {
530
531 if (pad->input_enabled) {
532 ret = pmic_mpp_read(state, pad, PMIC_MPP_REG_RT_STS);
533 if (ret < 0)
534 return;
535
536 ret &= PMIC_MPP_REG_RT_STS_VAL_MASK;
537 pad->out_value = ret;
538 }
539
540 seq_printf(s, " %-4s", pad->output_enabled ? "out" : "in");
541 seq_printf(s, " %-7s", pmic_mpp_functions[pad->function]);
542 seq_printf(s, " vin-%d", pad->power_source);
543 seq_printf(s, " %d", pad->aout_level);
544 if (pad->has_pullup)
545 seq_printf(s, " %-8s", biases[pad->pullup]);
546 seq_printf(s, " %-4s", pad->out_value ? "high" : "low");
547 if (pad->dtest)
548 seq_printf(s, " dtest%d", pad->dtest);
549 if (pad->paired)
550 seq_puts(s, " paired");
551 }
552 }
553
554 static const struct pinconf_ops pmic_mpp_pinconf_ops = {
555 .is_generic = true,
556 .pin_config_group_get = pmic_mpp_config_get,
557 .pin_config_group_set = pmic_mpp_config_set,
558 .pin_config_group_dbg_show = pmic_mpp_config_dbg_show,
559 };
560
pmic_mpp_direction_input(struct gpio_chip * chip,unsigned pin)561 static int pmic_mpp_direction_input(struct gpio_chip *chip, unsigned pin)
562 {
563 struct pmic_mpp_state *state = gpiochip_get_data(chip);
564 unsigned long config;
565
566 config = pinconf_to_config_packed(PIN_CONFIG_INPUT_ENABLE, 1);
567
568 return pmic_mpp_config_set(state->ctrl, pin, &config, 1);
569 }
570
pmic_mpp_direction_output(struct gpio_chip * chip,unsigned pin,int val)571 static int pmic_mpp_direction_output(struct gpio_chip *chip,
572 unsigned pin, int val)
573 {
574 struct pmic_mpp_state *state = gpiochip_get_data(chip);
575 unsigned long config;
576
577 config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, val);
578
579 return pmic_mpp_config_set(state->ctrl, pin, &config, 1);
580 }
581
pmic_mpp_get(struct gpio_chip * chip,unsigned pin)582 static int pmic_mpp_get(struct gpio_chip *chip, unsigned pin)
583 {
584 struct pmic_mpp_state *state = gpiochip_get_data(chip);
585 struct pmic_mpp_pad *pad;
586 int ret;
587
588 pad = state->ctrl->desc->pins[pin].drv_data;
589
590 if (pad->input_enabled) {
591 ret = pmic_mpp_read(state, pad, PMIC_MPP_REG_RT_STS);
592 if (ret < 0)
593 return ret;
594
595 pad->out_value = ret & PMIC_MPP_REG_RT_STS_VAL_MASK;
596 }
597
598 return !!pad->out_value;
599 }
600
pmic_mpp_set(struct gpio_chip * chip,unsigned pin,int value)601 static void pmic_mpp_set(struct gpio_chip *chip, unsigned pin, int value)
602 {
603 struct pmic_mpp_state *state = gpiochip_get_data(chip);
604 unsigned long config;
605
606 config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, value);
607
608 pmic_mpp_config_set(state->ctrl, pin, &config, 1);
609 }
610
pmic_mpp_of_xlate(struct gpio_chip * chip,const struct of_phandle_args * gpio_desc,u32 * flags)611 static int pmic_mpp_of_xlate(struct gpio_chip *chip,
612 const struct of_phandle_args *gpio_desc,
613 u32 *flags)
614 {
615 if (chip->of_gpio_n_cells < 2)
616 return -EINVAL;
617
618 if (flags)
619 *flags = gpio_desc->args[1];
620
621 return gpio_desc->args[0] - PMIC_MPP_PHYSICAL_OFFSET;
622 }
623
pmic_mpp_dbg_show(struct seq_file * s,struct gpio_chip * chip)624 static void pmic_mpp_dbg_show(struct seq_file *s, struct gpio_chip *chip)
625 {
626 struct pmic_mpp_state *state = gpiochip_get_data(chip);
627 unsigned i;
628
629 for (i = 0; i < chip->ngpio; i++) {
630 pmic_mpp_config_dbg_show(state->ctrl, s, i);
631 seq_puts(s, "\n");
632 }
633 }
634
635 static const struct gpio_chip pmic_mpp_gpio_template = {
636 .direction_input = pmic_mpp_direction_input,
637 .direction_output = pmic_mpp_direction_output,
638 .get = pmic_mpp_get,
639 .set = pmic_mpp_set,
640 .request = gpiochip_generic_request,
641 .free = gpiochip_generic_free,
642 .of_xlate = pmic_mpp_of_xlate,
643 .dbg_show = pmic_mpp_dbg_show,
644 };
645
pmic_mpp_populate(struct pmic_mpp_state * state,struct pmic_mpp_pad * pad)646 static int pmic_mpp_populate(struct pmic_mpp_state *state,
647 struct pmic_mpp_pad *pad)
648 {
649 int type, subtype, val, dir;
650 unsigned int sel;
651
652 type = pmic_mpp_read(state, pad, PMIC_MPP_REG_TYPE);
653 if (type < 0)
654 return type;
655
656 if (type != PMIC_MPP_TYPE) {
657 dev_err(state->dev, "incorrect block type 0x%x at 0x%x\n",
658 type, pad->base);
659 return -ENODEV;
660 }
661
662 subtype = pmic_mpp_read(state, pad, PMIC_MPP_REG_SUBTYPE);
663 if (subtype < 0)
664 return subtype;
665
666 switch (subtype) {
667 case PMIC_MPP_SUBTYPE_4CH_NO_ANA_OUT:
668 case PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT:
669 case PMIC_MPP_SUBTYPE_4CH_NO_SINK:
670 case PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK:
671 case PMIC_MPP_SUBTYPE_4CH_FULL_FUNC:
672 pad->num_sources = 4;
673 break;
674 case PMIC_MPP_SUBTYPE_8CH_FULL_FUNC:
675 pad->num_sources = 8;
676 break;
677 default:
678 dev_err(state->dev, "unknown MPP type 0x%x at 0x%x\n",
679 subtype, pad->base);
680 return -ENODEV;
681 }
682
683 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_MODE_CTL);
684 if (val < 0)
685 return val;
686
687 pad->out_value = val & PMIC_MPP_REG_MODE_VALUE_MASK;
688
689 dir = val >> PMIC_MPP_REG_MODE_DIR_SHIFT;
690 dir &= PMIC_MPP_REG_MODE_DIR_MASK;
691
692 switch (dir) {
693 case PMIC_MPP_MODE_DIGITAL_INPUT:
694 pad->input_enabled = true;
695 pad->output_enabled = false;
696 pad->function = PMIC_MPP_DIGITAL;
697 break;
698 case PMIC_MPP_MODE_DIGITAL_OUTPUT:
699 pad->input_enabled = false;
700 pad->output_enabled = true;
701 pad->function = PMIC_MPP_DIGITAL;
702 break;
703 case PMIC_MPP_MODE_DIGITAL_BIDIR:
704 pad->input_enabled = true;
705 pad->output_enabled = true;
706 pad->function = PMIC_MPP_DIGITAL;
707 break;
708 case PMIC_MPP_MODE_ANALOG_BIDIR:
709 pad->input_enabled = true;
710 pad->output_enabled = true;
711 pad->function = PMIC_MPP_ANALOG;
712 break;
713 case PMIC_MPP_MODE_ANALOG_INPUT:
714 pad->input_enabled = true;
715 pad->output_enabled = false;
716 pad->function = PMIC_MPP_ANALOG;
717 break;
718 case PMIC_MPP_MODE_ANALOG_OUTPUT:
719 pad->input_enabled = false;
720 pad->output_enabled = true;
721 pad->function = PMIC_MPP_ANALOG;
722 break;
723 case PMIC_MPP_MODE_CURRENT_SINK:
724 pad->input_enabled = false;
725 pad->output_enabled = true;
726 pad->function = PMIC_MPP_SINK;
727 break;
728 default:
729 dev_err(state->dev, "unknown MPP direction\n");
730 return -ENODEV;
731 }
732
733 sel = val >> PMIC_MPP_REG_MODE_FUNCTION_SHIFT;
734 sel &= PMIC_MPP_REG_MODE_FUNCTION_MASK;
735
736 if (sel >= PMIC_MPP_SELECTOR_DTEST_FIRST)
737 pad->dtest = sel + 1;
738 else if (sel == PMIC_MPP_SELECTOR_PAIRED)
739 pad->paired = true;
740
741 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_DIG_VIN_CTL);
742 if (val < 0)
743 return val;
744
745 pad->power_source = val >> PMIC_MPP_REG_VIN_SHIFT;
746 pad->power_source &= PMIC_MPP_REG_VIN_MASK;
747
748 if (subtype != PMIC_MPP_SUBTYPE_ULT_4CH_NO_ANA_OUT &&
749 subtype != PMIC_MPP_SUBTYPE_ULT_4CH_NO_SINK) {
750 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_DIG_PULL_CTL);
751 if (val < 0)
752 return val;
753
754 pad->pullup = val >> PMIC_MPP_REG_PULL_SHIFT;
755 pad->pullup &= PMIC_MPP_REG_PULL_MASK;
756 pad->has_pullup = true;
757 }
758
759 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_AIN_CTL);
760 if (val < 0)
761 return val;
762
763 pad->amux_input = val >> PMIC_MPP_REG_AIN_ROUTE_SHIFT;
764 pad->amux_input &= PMIC_MPP_REG_AIN_ROUTE_MASK;
765
766 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_SINK_CTL);
767 if (val < 0)
768 return val;
769
770 pad->drive_strength = val;
771
772 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_AOUT_CTL);
773 if (val < 0)
774 return val;
775
776 pad->aout_level = val;
777
778 val = pmic_mpp_read(state, pad, PMIC_MPP_REG_EN_CTL);
779 if (val < 0)
780 return val;
781
782 pad->is_enabled = !!val;
783
784 return 0;
785 }
786
pmic_mpp_domain_translate(struct irq_domain * domain,struct irq_fwspec * fwspec,unsigned long * hwirq,unsigned int * type)787 static int pmic_mpp_domain_translate(struct irq_domain *domain,
788 struct irq_fwspec *fwspec,
789 unsigned long *hwirq,
790 unsigned int *type)
791 {
792 struct pmic_mpp_state *state = container_of(domain->host_data,
793 struct pmic_mpp_state,
794 chip);
795
796 if (fwspec->param_count != 2 ||
797 fwspec->param[0] < 1 || fwspec->param[0] > state->chip.ngpio)
798 return -EINVAL;
799
800 *hwirq = fwspec->param[0] - PMIC_MPP_PHYSICAL_OFFSET;
801 *type = fwspec->param[1];
802
803 return 0;
804 }
805
pmic_mpp_child_offset_to_irq(struct gpio_chip * chip,unsigned int offset)806 static unsigned int pmic_mpp_child_offset_to_irq(struct gpio_chip *chip,
807 unsigned int offset)
808 {
809 return offset + PMIC_MPP_PHYSICAL_OFFSET;
810 }
811
pmic_mpp_child_to_parent_hwirq(struct gpio_chip * chip,unsigned int child_hwirq,unsigned int child_type,unsigned int * parent_hwirq,unsigned int * parent_type)812 static int pmic_mpp_child_to_parent_hwirq(struct gpio_chip *chip,
813 unsigned int child_hwirq,
814 unsigned int child_type,
815 unsigned int *parent_hwirq,
816 unsigned int *parent_type)
817 {
818 *parent_hwirq = child_hwirq + 0xc0;
819 *parent_type = child_type;
820
821 return 0;
822 }
823
pmic_mpp_probe(struct platform_device * pdev)824 static int pmic_mpp_probe(struct platform_device *pdev)
825 {
826 struct irq_domain *parent_domain;
827 struct device_node *parent_node;
828 struct device *dev = &pdev->dev;
829 struct pinctrl_pin_desc *pindesc;
830 struct pinctrl_desc *pctrldesc;
831 struct pmic_mpp_pad *pad, *pads;
832 struct pmic_mpp_state *state;
833 struct gpio_irq_chip *girq;
834 int ret, npins, i;
835 u32 reg;
836
837 ret = of_property_read_u32(dev->of_node, "reg", ®);
838 if (ret < 0) {
839 dev_err(dev, "missing base address");
840 return ret;
841 }
842
843 npins = (uintptr_t) device_get_match_data(&pdev->dev);
844
845 BUG_ON(npins > ARRAY_SIZE(pmic_mpp_groups));
846
847 state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
848 if (!state)
849 return -ENOMEM;
850
851 platform_set_drvdata(pdev, state);
852
853 state->dev = &pdev->dev;
854 state->map = dev_get_regmap(dev->parent, NULL);
855
856 pindesc = devm_kcalloc(dev, npins, sizeof(*pindesc), GFP_KERNEL);
857 if (!pindesc)
858 return -ENOMEM;
859
860 pads = devm_kcalloc(dev, npins, sizeof(*pads), GFP_KERNEL);
861 if (!pads)
862 return -ENOMEM;
863
864 pctrldesc = devm_kzalloc(dev, sizeof(*pctrldesc), GFP_KERNEL);
865 if (!pctrldesc)
866 return -ENOMEM;
867
868 pctrldesc->pctlops = &pmic_mpp_pinctrl_ops;
869 pctrldesc->pmxops = &pmic_mpp_pinmux_ops;
870 pctrldesc->confops = &pmic_mpp_pinconf_ops;
871 pctrldesc->owner = THIS_MODULE;
872 pctrldesc->name = dev_name(dev);
873 pctrldesc->pins = pindesc;
874 pctrldesc->npins = npins;
875
876 pctrldesc->num_custom_params = ARRAY_SIZE(pmic_mpp_bindings);
877 pctrldesc->custom_params = pmic_mpp_bindings;
878 #ifdef CONFIG_DEBUG_FS
879 pctrldesc->custom_conf_items = pmic_conf_items;
880 #endif
881
882 for (i = 0; i < npins; i++, pindesc++) {
883 pad = &pads[i];
884 pindesc->drv_data = pad;
885 pindesc->number = i;
886 pindesc->name = pmic_mpp_groups[i];
887
888 pad->base = reg + i * PMIC_MPP_ADDRESS_RANGE;
889
890 ret = pmic_mpp_populate(state, pad);
891 if (ret < 0)
892 return ret;
893 }
894
895 state->chip = pmic_mpp_gpio_template;
896 state->chip.parent = dev;
897 state->chip.base = -1;
898 state->chip.ngpio = npins;
899 state->chip.label = dev_name(dev);
900 state->chip.of_gpio_n_cells = 2;
901 state->chip.can_sleep = false;
902
903 state->ctrl = devm_pinctrl_register(dev, pctrldesc, state);
904 if (IS_ERR(state->ctrl))
905 return PTR_ERR(state->ctrl);
906
907 parent_node = of_irq_find_parent(state->dev->of_node);
908 if (!parent_node)
909 return -ENXIO;
910
911 parent_domain = irq_find_host(parent_node);
912 of_node_put(parent_node);
913 if (!parent_domain)
914 return -ENXIO;
915
916 state->irq.name = "spmi-mpp",
917 state->irq.irq_ack = irq_chip_ack_parent,
918 state->irq.irq_mask = irq_chip_mask_parent,
919 state->irq.irq_unmask = irq_chip_unmask_parent,
920 state->irq.irq_set_type = irq_chip_set_type_parent,
921 state->irq.irq_set_wake = irq_chip_set_wake_parent,
922 state->irq.flags = IRQCHIP_MASK_ON_SUSPEND,
923
924 girq = &state->chip.irq;
925 girq->chip = &state->irq;
926 girq->default_type = IRQ_TYPE_NONE;
927 girq->handler = handle_level_irq;
928 girq->fwnode = of_node_to_fwnode(state->dev->of_node);
929 girq->parent_domain = parent_domain;
930 girq->child_to_parent_hwirq = pmic_mpp_child_to_parent_hwirq;
931 girq->populate_parent_alloc_arg = gpiochip_populate_parent_fwspec_fourcell;
932 girq->child_offset_to_irq = pmic_mpp_child_offset_to_irq;
933 girq->child_irq_domain_ops.translate = pmic_mpp_domain_translate;
934
935 ret = gpiochip_add_data(&state->chip, state);
936 if (ret) {
937 dev_err(state->dev, "can't add gpio chip\n");
938 return ret;
939 }
940
941 ret = gpiochip_add_pin_range(&state->chip, dev_name(dev), 0, 0, npins);
942 if (ret) {
943 dev_err(dev, "failed to add pin range\n");
944 goto err_range;
945 }
946
947 return 0;
948
949 err_range:
950 gpiochip_remove(&state->chip);
951 return ret;
952 }
953
pmic_mpp_remove(struct platform_device * pdev)954 static int pmic_mpp_remove(struct platform_device *pdev)
955 {
956 struct pmic_mpp_state *state = platform_get_drvdata(pdev);
957
958 gpiochip_remove(&state->chip);
959 return 0;
960 }
961
962 static const struct of_device_id pmic_mpp_of_match[] = {
963 { .compatible = "qcom,pm8019-mpp", .data = (void *) 6 },
964 { .compatible = "qcom,pm8226-mpp", .data = (void *) 8 },
965 { .compatible = "qcom,pm8841-mpp", .data = (void *) 4 },
966 { .compatible = "qcom,pm8916-mpp", .data = (void *) 4 },
967 { .compatible = "qcom,pm8941-mpp", .data = (void *) 8 },
968 { .compatible = "qcom,pm8950-mpp", .data = (void *) 4 },
969 { .compatible = "qcom,pmi8950-mpp", .data = (void *) 4 },
970 { .compatible = "qcom,pm8994-mpp", .data = (void *) 8 },
971 { .compatible = "qcom,pma8084-mpp", .data = (void *) 8 },
972 { .compatible = "qcom,pmi8994-mpp", .data = (void *) 4 },
973 { },
974 };
975
976 MODULE_DEVICE_TABLE(of, pmic_mpp_of_match);
977
978 static struct platform_driver pmic_mpp_driver = {
979 .driver = {
980 .name = "qcom-spmi-mpp",
981 .of_match_table = pmic_mpp_of_match,
982 },
983 .probe = pmic_mpp_probe,
984 .remove = pmic_mpp_remove,
985 };
986
987 module_platform_driver(pmic_mpp_driver);
988
989 MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");
990 MODULE_DESCRIPTION("Qualcomm SPMI PMIC MPP pin control driver");
991 MODULE_ALIAS("platform:qcom-spmi-mpp");
992 MODULE_LICENSE("GPL v2");
993