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[mirror_ubuntu-bionic-kernel.git] / drivers / pinctrl / intel / pinctrl-cherryview.c
1 /*
2 * Cherryview/Braswell pinctrl driver
3 *
4 * Copyright (C) 2014, Intel Corporation
5 * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
6 *
7 * This driver is based on the original Cherryview GPIO driver by
8 * Ning Li <ning.li@intel.com>
9 * Alan Cox <alan@linux.intel.com>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16 #include <linux/dmi.h>
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/types.h>
21 #include <linux/gpio.h>
22 #include <linux/gpio/driver.h>
23 #include <linux/acpi.h>
24 #include <linux/pinctrl/pinctrl.h>
25 #include <linux/pinctrl/pinmux.h>
26 #include <linux/pinctrl/pinconf.h>
27 #include <linux/pinctrl/pinconf-generic.h>
28 #include <linux/platform_device.h>
29
30 #define CHV_INTSTAT 0x300
31 #define CHV_INTMASK 0x380
32
33 #define FAMILY_PAD_REGS_OFF 0x4400
34 #define FAMILY_PAD_REGS_SIZE 0x400
35 #define MAX_FAMILY_PAD_GPIO_NO 15
36 #define GPIO_REGS_SIZE 8
37
38 #define CHV_PADCTRL0 0x000
39 #define CHV_PADCTRL0_INTSEL_SHIFT 28
40 #define CHV_PADCTRL0_INTSEL_MASK (0xf << CHV_PADCTRL0_INTSEL_SHIFT)
41 #define CHV_PADCTRL0_TERM_UP BIT(23)
42 #define CHV_PADCTRL0_TERM_SHIFT 20
43 #define CHV_PADCTRL0_TERM_MASK (7 << CHV_PADCTRL0_TERM_SHIFT)
44 #define CHV_PADCTRL0_TERM_20K 1
45 #define CHV_PADCTRL0_TERM_5K 2
46 #define CHV_PADCTRL0_TERM_1K 4
47 #define CHV_PADCTRL0_PMODE_SHIFT 16
48 #define CHV_PADCTRL0_PMODE_MASK (0xf << CHV_PADCTRL0_PMODE_SHIFT)
49 #define CHV_PADCTRL0_GPIOEN BIT(15)
50 #define CHV_PADCTRL0_GPIOCFG_SHIFT 8
51 #define CHV_PADCTRL0_GPIOCFG_MASK (7 << CHV_PADCTRL0_GPIOCFG_SHIFT)
52 #define CHV_PADCTRL0_GPIOCFG_GPIO 0
53 #define CHV_PADCTRL0_GPIOCFG_GPO 1
54 #define CHV_PADCTRL0_GPIOCFG_GPI 2
55 #define CHV_PADCTRL0_GPIOCFG_HIZ 3
56 #define CHV_PADCTRL0_GPIOTXSTATE BIT(1)
57 #define CHV_PADCTRL0_GPIORXSTATE BIT(0)
58
59 #define CHV_PADCTRL1 0x004
60 #define CHV_PADCTRL1_CFGLOCK BIT(31)
61 #define CHV_PADCTRL1_INVRXTX_SHIFT 4
62 #define CHV_PADCTRL1_INVRXTX_MASK (0xf << CHV_PADCTRL1_INVRXTX_SHIFT)
63 #define CHV_PADCTRL1_INVRXTX_TXENABLE (2 << CHV_PADCTRL1_INVRXTX_SHIFT)
64 #define CHV_PADCTRL1_ODEN BIT(3)
65 #define CHV_PADCTRL1_INVRXTX_RXDATA (4 << CHV_PADCTRL1_INVRXTX_SHIFT)
66 #define CHV_PADCTRL1_INTWAKECFG_MASK 7
67 #define CHV_PADCTRL1_INTWAKECFG_FALLING 1
68 #define CHV_PADCTRL1_INTWAKECFG_RISING 2
69 #define CHV_PADCTRL1_INTWAKECFG_BOTH 3
70 #define CHV_PADCTRL1_INTWAKECFG_LEVEL 4
71
72 /**
73 * struct chv_alternate_function - A per group or per pin alternate function
74 * @pin: Pin number (only used in per pin configs)
75 * @mode: Mode the pin should be set in
76 * @invert_oe: Invert OE for this pin
77 */
78 struct chv_alternate_function {
79 unsigned pin;
80 u8 mode;
81 bool invert_oe;
82 };
83
84 /**
85 * struct chv_pincgroup - describes a CHV pin group
86 * @name: Name of the group
87 * @pins: An array of pins in this group
88 * @npins: Number of pins in this group
89 * @altfunc: Alternate function applied to all pins in this group
90 * @overrides: Alternate function override per pin or %NULL if not used
91 * @noverrides: Number of per pin alternate function overrides if
92 * @overrides != NULL.
93 */
94 struct chv_pingroup {
95 const char *name;
96 const unsigned *pins;
97 size_t npins;
98 struct chv_alternate_function altfunc;
99 const struct chv_alternate_function *overrides;
100 size_t noverrides;
101 };
102
103 /**
104 * struct chv_function - A CHV pinmux function
105 * @name: Name of the function
106 * @groups: An array of groups for this function
107 * @ngroups: Number of groups in @groups
108 */
109 struct chv_function {
110 const char *name;
111 const char * const *groups;
112 size_t ngroups;
113 };
114
115 /**
116 * struct chv_gpio_pinrange - A range of pins that can be used as GPIOs
117 * @base: Start pin number
118 * @npins: Number of pins in this range
119 */
120 struct chv_gpio_pinrange {
121 unsigned base;
122 unsigned npins;
123 };
124
125 /**
126 * struct chv_community - A community specific configuration
127 * @uid: ACPI _UID used to match the community
128 * @pins: All pins in this community
129 * @npins: Number of pins
130 * @groups: All groups in this community
131 * @ngroups: Number of groups
132 * @functions: All functions in this community
133 * @nfunctions: Number of functions
134 * @gpio_ranges: An array of GPIO ranges in this community
135 * @ngpio_ranges: Number of GPIO ranges
136 * @nirqs: Total number of IRQs this community can generate
137 */
138 struct chv_community {
139 const char *uid;
140 const struct pinctrl_pin_desc *pins;
141 size_t npins;
142 const struct chv_pingroup *groups;
143 size_t ngroups;
144 const struct chv_function *functions;
145 size_t nfunctions;
146 const struct chv_gpio_pinrange *gpio_ranges;
147 size_t ngpio_ranges;
148 size_t nirqs;
149 acpi_adr_space_type acpi_space_id;
150 };
151
152 struct chv_pin_context {
153 u32 padctrl0;
154 u32 padctrl1;
155 };
156
157 /**
158 * struct chv_pinctrl - CHV pinctrl private structure
159 * @dev: Pointer to the parent device
160 * @pctldesc: Pin controller description
161 * @pctldev: Pointer to the pin controller device
162 * @chip: GPIO chip in this pin controller
163 * @regs: MMIO registers
164 * @intr_lines: Stores mapping between 16 HW interrupt wires and GPIO
165 * offset (in GPIO number space)
166 * @community: Community this pinctrl instance represents
167 *
168 * The first group in @groups is expected to contain all pins that can be
169 * used as GPIOs.
170 */
171 struct chv_pinctrl {
172 struct device *dev;
173 struct pinctrl_desc pctldesc;
174 struct pinctrl_dev *pctldev;
175 struct gpio_chip chip;
176 void __iomem *regs;
177 unsigned intr_lines[16];
178 const struct chv_community *community;
179 u32 saved_intmask;
180 struct chv_pin_context *saved_pin_context;
181 };
182
183 #define ALTERNATE_FUNCTION(p, m, i) \
184 { \
185 .pin = (p), \
186 .mode = (m), \
187 .invert_oe = (i), \
188 }
189
190 #define PIN_GROUP(n, p, m, i) \
191 { \
192 .name = (n), \
193 .pins = (p), \
194 .npins = ARRAY_SIZE((p)), \
195 .altfunc.mode = (m), \
196 .altfunc.invert_oe = (i), \
197 }
198
199 #define PIN_GROUP_WITH_OVERRIDE(n, p, m, i, o) \
200 { \
201 .name = (n), \
202 .pins = (p), \
203 .npins = ARRAY_SIZE((p)), \
204 .altfunc.mode = (m), \
205 .altfunc.invert_oe = (i), \
206 .overrides = (o), \
207 .noverrides = ARRAY_SIZE((o)), \
208 }
209
210 #define FUNCTION(n, g) \
211 { \
212 .name = (n), \
213 .groups = (g), \
214 .ngroups = ARRAY_SIZE((g)), \
215 }
216
217 #define GPIO_PINRANGE(start, end) \
218 { \
219 .base = (start), \
220 .npins = (end) - (start) + 1, \
221 }
222
223 static const struct pinctrl_pin_desc southwest_pins[] = {
224 PINCTRL_PIN(0, "FST_SPI_D2"),
225 PINCTRL_PIN(1, "FST_SPI_D0"),
226 PINCTRL_PIN(2, "FST_SPI_CLK"),
227 PINCTRL_PIN(3, "FST_SPI_D3"),
228 PINCTRL_PIN(4, "FST_SPI_CS1_B"),
229 PINCTRL_PIN(5, "FST_SPI_D1"),
230 PINCTRL_PIN(6, "FST_SPI_CS0_B"),
231 PINCTRL_PIN(7, "FST_SPI_CS2_B"),
232
233 PINCTRL_PIN(15, "UART1_RTS_B"),
234 PINCTRL_PIN(16, "UART1_RXD"),
235 PINCTRL_PIN(17, "UART2_RXD"),
236 PINCTRL_PIN(18, "UART1_CTS_B"),
237 PINCTRL_PIN(19, "UART2_RTS_B"),
238 PINCTRL_PIN(20, "UART1_TXD"),
239 PINCTRL_PIN(21, "UART2_TXD"),
240 PINCTRL_PIN(22, "UART2_CTS_B"),
241
242 PINCTRL_PIN(30, "MF_HDA_CLK"),
243 PINCTRL_PIN(31, "MF_HDA_RSTB"),
244 PINCTRL_PIN(32, "MF_HDA_SDIO"),
245 PINCTRL_PIN(33, "MF_HDA_SDO"),
246 PINCTRL_PIN(34, "MF_HDA_DOCKRSTB"),
247 PINCTRL_PIN(35, "MF_HDA_SYNC"),
248 PINCTRL_PIN(36, "MF_HDA_SDI1"),
249 PINCTRL_PIN(37, "MF_HDA_DOCKENB"),
250
251 PINCTRL_PIN(45, "I2C5_SDA"),
252 PINCTRL_PIN(46, "I2C4_SDA"),
253 PINCTRL_PIN(47, "I2C6_SDA"),
254 PINCTRL_PIN(48, "I2C5_SCL"),
255 PINCTRL_PIN(49, "I2C_NFC_SDA"),
256 PINCTRL_PIN(50, "I2C4_SCL"),
257 PINCTRL_PIN(51, "I2C6_SCL"),
258 PINCTRL_PIN(52, "I2C_NFC_SCL"),
259
260 PINCTRL_PIN(60, "I2C1_SDA"),
261 PINCTRL_PIN(61, "I2C0_SDA"),
262 PINCTRL_PIN(62, "I2C2_SDA"),
263 PINCTRL_PIN(63, "I2C1_SCL"),
264 PINCTRL_PIN(64, "I2C3_SDA"),
265 PINCTRL_PIN(65, "I2C0_SCL"),
266 PINCTRL_PIN(66, "I2C2_SCL"),
267 PINCTRL_PIN(67, "I2C3_SCL"),
268
269 PINCTRL_PIN(75, "SATA_GP0"),
270 PINCTRL_PIN(76, "SATA_GP1"),
271 PINCTRL_PIN(77, "SATA_LEDN"),
272 PINCTRL_PIN(78, "SATA_GP2"),
273 PINCTRL_PIN(79, "MF_SMB_ALERTB"),
274 PINCTRL_PIN(80, "SATA_GP3"),
275 PINCTRL_PIN(81, "MF_SMB_CLK"),
276 PINCTRL_PIN(82, "MF_SMB_DATA"),
277
278 PINCTRL_PIN(90, "PCIE_CLKREQ0B"),
279 PINCTRL_PIN(91, "PCIE_CLKREQ1B"),
280 PINCTRL_PIN(92, "GP_SSP_2_CLK"),
281 PINCTRL_PIN(93, "PCIE_CLKREQ2B"),
282 PINCTRL_PIN(94, "GP_SSP_2_RXD"),
283 PINCTRL_PIN(95, "PCIE_CLKREQ3B"),
284 PINCTRL_PIN(96, "GP_SSP_2_FS"),
285 PINCTRL_PIN(97, "GP_SSP_2_TXD"),
286 };
287
288 static const unsigned southwest_fspi_pins[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
289 static const unsigned southwest_uart0_pins[] = { 16, 20 };
290 static const unsigned southwest_uart1_pins[] = { 15, 16, 18, 20 };
291 static const unsigned southwest_uart2_pins[] = { 17, 19, 21, 22 };
292 static const unsigned southwest_i2c0_pins[] = { 61, 65 };
293 static const unsigned southwest_hda_pins[] = { 30, 31, 32, 33, 34, 35, 36, 37 };
294 static const unsigned southwest_lpe_pins[] = {
295 30, 31, 32, 33, 34, 35, 36, 37, 92, 94, 96, 97,
296 };
297 static const unsigned southwest_i2c1_pins[] = { 60, 63 };
298 static const unsigned southwest_i2c2_pins[] = { 62, 66 };
299 static const unsigned southwest_i2c3_pins[] = { 64, 67 };
300 static const unsigned southwest_i2c4_pins[] = { 46, 50 };
301 static const unsigned southwest_i2c5_pins[] = { 45, 48 };
302 static const unsigned southwest_i2c6_pins[] = { 47, 51 };
303 static const unsigned southwest_i2c_nfc_pins[] = { 49, 52 };
304 static const unsigned southwest_smbus_pins[] = { 79, 81, 82 };
305 static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 };
306
307 /* LPE I2S TXD pins need to have invert_oe set */
308 static const struct chv_alternate_function southwest_lpe_altfuncs[] = {
309 ALTERNATE_FUNCTION(30, 1, true),
310 ALTERNATE_FUNCTION(34, 1, true),
311 ALTERNATE_FUNCTION(97, 1, true),
312 };
313
314 /*
315 * Two spi3 chipselects are available in different mode than the main spi3
316 * functionality, which is using mode 1.
317 */
318 static const struct chv_alternate_function southwest_spi3_altfuncs[] = {
319 ALTERNATE_FUNCTION(76, 3, false),
320 ALTERNATE_FUNCTION(80, 3, false),
321 };
322
323 static const struct chv_pingroup southwest_groups[] = {
324 PIN_GROUP("uart0_grp", southwest_uart0_pins, 2, false),
325 PIN_GROUP("uart1_grp", southwest_uart1_pins, 1, false),
326 PIN_GROUP("uart2_grp", southwest_uart2_pins, 1, false),
327 PIN_GROUP("hda_grp", southwest_hda_pins, 2, false),
328 PIN_GROUP("i2c0_grp", southwest_i2c0_pins, 1, true),
329 PIN_GROUP("i2c1_grp", southwest_i2c1_pins, 1, true),
330 PIN_GROUP("i2c2_grp", southwest_i2c2_pins, 1, true),
331 PIN_GROUP("i2c3_grp", southwest_i2c3_pins, 1, true),
332 PIN_GROUP("i2c4_grp", southwest_i2c4_pins, 1, true),
333 PIN_GROUP("i2c5_grp", southwest_i2c5_pins, 1, true),
334 PIN_GROUP("i2c6_grp", southwest_i2c6_pins, 1, true),
335 PIN_GROUP("i2c_nfc_grp", southwest_i2c_nfc_pins, 2, true),
336
337 PIN_GROUP_WITH_OVERRIDE("lpe_grp", southwest_lpe_pins, 1, false,
338 southwest_lpe_altfuncs),
339 PIN_GROUP_WITH_OVERRIDE("spi3_grp", southwest_spi3_pins, 2, false,
340 southwest_spi3_altfuncs),
341 };
342
343 static const char * const southwest_uart0_groups[] = { "uart0_grp" };
344 static const char * const southwest_uart1_groups[] = { "uart1_grp" };
345 static const char * const southwest_uart2_groups[] = { "uart2_grp" };
346 static const char * const southwest_hda_groups[] = { "hda_grp" };
347 static const char * const southwest_lpe_groups[] = { "lpe_grp" };
348 static const char * const southwest_i2c0_groups[] = { "i2c0_grp" };
349 static const char * const southwest_i2c1_groups[] = { "i2c1_grp" };
350 static const char * const southwest_i2c2_groups[] = { "i2c2_grp" };
351 static const char * const southwest_i2c3_groups[] = { "i2c3_grp" };
352 static const char * const southwest_i2c4_groups[] = { "i2c4_grp" };
353 static const char * const southwest_i2c5_groups[] = { "i2c5_grp" };
354 static const char * const southwest_i2c6_groups[] = { "i2c6_grp" };
355 static const char * const southwest_i2c_nfc_groups[] = { "i2c_nfc_grp" };
356 static const char * const southwest_spi3_groups[] = { "spi3_grp" };
357
358 /*
359 * Only do pinmuxing for certain LPSS devices for now. Rest of the pins are
360 * enabled only as GPIOs.
361 */
362 static const struct chv_function southwest_functions[] = {
363 FUNCTION("uart0", southwest_uart0_groups),
364 FUNCTION("uart1", southwest_uart1_groups),
365 FUNCTION("uart2", southwest_uart2_groups),
366 FUNCTION("hda", southwest_hda_groups),
367 FUNCTION("lpe", southwest_lpe_groups),
368 FUNCTION("i2c0", southwest_i2c0_groups),
369 FUNCTION("i2c1", southwest_i2c1_groups),
370 FUNCTION("i2c2", southwest_i2c2_groups),
371 FUNCTION("i2c3", southwest_i2c3_groups),
372 FUNCTION("i2c4", southwest_i2c4_groups),
373 FUNCTION("i2c5", southwest_i2c5_groups),
374 FUNCTION("i2c6", southwest_i2c6_groups),
375 FUNCTION("i2c_nfc", southwest_i2c_nfc_groups),
376 FUNCTION("spi3", southwest_spi3_groups),
377 };
378
379 static const struct chv_gpio_pinrange southwest_gpio_ranges[] = {
380 GPIO_PINRANGE(0, 7),
381 GPIO_PINRANGE(15, 22),
382 GPIO_PINRANGE(30, 37),
383 GPIO_PINRANGE(45, 52),
384 GPIO_PINRANGE(60, 67),
385 GPIO_PINRANGE(75, 82),
386 GPIO_PINRANGE(90, 97),
387 };
388
389 static const struct chv_community southwest_community = {
390 .uid = "1",
391 .pins = southwest_pins,
392 .npins = ARRAY_SIZE(southwest_pins),
393 .groups = southwest_groups,
394 .ngroups = ARRAY_SIZE(southwest_groups),
395 .functions = southwest_functions,
396 .nfunctions = ARRAY_SIZE(southwest_functions),
397 .gpio_ranges = southwest_gpio_ranges,
398 .ngpio_ranges = ARRAY_SIZE(southwest_gpio_ranges),
399 /*
400 * Southwest community can benerate GPIO interrupts only for the
401 * first 8 interrupts. The upper half (8-15) can only be used to
402 * trigger GPEs.
403 */
404 .nirqs = 8,
405 .acpi_space_id = 0x91,
406 };
407
408 static const struct pinctrl_pin_desc north_pins[] = {
409 PINCTRL_PIN(0, "GPIO_DFX_0"),
410 PINCTRL_PIN(1, "GPIO_DFX_3"),
411 PINCTRL_PIN(2, "GPIO_DFX_7"),
412 PINCTRL_PIN(3, "GPIO_DFX_1"),
413 PINCTRL_PIN(4, "GPIO_DFX_5"),
414 PINCTRL_PIN(5, "GPIO_DFX_4"),
415 PINCTRL_PIN(6, "GPIO_DFX_8"),
416 PINCTRL_PIN(7, "GPIO_DFX_2"),
417 PINCTRL_PIN(8, "GPIO_DFX_6"),
418
419 PINCTRL_PIN(15, "GPIO_SUS0"),
420 PINCTRL_PIN(16, "SEC_GPIO_SUS10"),
421 PINCTRL_PIN(17, "GPIO_SUS3"),
422 PINCTRL_PIN(18, "GPIO_SUS7"),
423 PINCTRL_PIN(19, "GPIO_SUS1"),
424 PINCTRL_PIN(20, "GPIO_SUS5"),
425 PINCTRL_PIN(21, "SEC_GPIO_SUS11"),
426 PINCTRL_PIN(22, "GPIO_SUS4"),
427 PINCTRL_PIN(23, "SEC_GPIO_SUS8"),
428 PINCTRL_PIN(24, "GPIO_SUS2"),
429 PINCTRL_PIN(25, "GPIO_SUS6"),
430 PINCTRL_PIN(26, "CX_PREQ_B"),
431 PINCTRL_PIN(27, "SEC_GPIO_SUS9"),
432
433 PINCTRL_PIN(30, "TRST_B"),
434 PINCTRL_PIN(31, "TCK"),
435 PINCTRL_PIN(32, "PROCHOT_B"),
436 PINCTRL_PIN(33, "SVIDO_DATA"),
437 PINCTRL_PIN(34, "TMS"),
438 PINCTRL_PIN(35, "CX_PRDY_B_2"),
439 PINCTRL_PIN(36, "TDO_2"),
440 PINCTRL_PIN(37, "CX_PRDY_B"),
441 PINCTRL_PIN(38, "SVIDO_ALERT_B"),
442 PINCTRL_PIN(39, "TDO"),
443 PINCTRL_PIN(40, "SVIDO_CLK"),
444 PINCTRL_PIN(41, "TDI"),
445
446 PINCTRL_PIN(45, "GP_CAMERASB_05"),
447 PINCTRL_PIN(46, "GP_CAMERASB_02"),
448 PINCTRL_PIN(47, "GP_CAMERASB_08"),
449 PINCTRL_PIN(48, "GP_CAMERASB_00"),
450 PINCTRL_PIN(49, "GP_CAMERASB_06"),
451 PINCTRL_PIN(50, "GP_CAMERASB_10"),
452 PINCTRL_PIN(51, "GP_CAMERASB_03"),
453 PINCTRL_PIN(52, "GP_CAMERASB_09"),
454 PINCTRL_PIN(53, "GP_CAMERASB_01"),
455 PINCTRL_PIN(54, "GP_CAMERASB_07"),
456 PINCTRL_PIN(55, "GP_CAMERASB_11"),
457 PINCTRL_PIN(56, "GP_CAMERASB_04"),
458
459 PINCTRL_PIN(60, "PANEL0_BKLTEN"),
460 PINCTRL_PIN(61, "HV_DDI0_HPD"),
461 PINCTRL_PIN(62, "HV_DDI2_DDC_SDA"),
462 PINCTRL_PIN(63, "PANEL1_BKLTCTL"),
463 PINCTRL_PIN(64, "HV_DDI1_HPD"),
464 PINCTRL_PIN(65, "PANEL0_BKLTCTL"),
465 PINCTRL_PIN(66, "HV_DDI0_DDC_SDA"),
466 PINCTRL_PIN(67, "HV_DDI2_DDC_SCL"),
467 PINCTRL_PIN(68, "HV_DDI2_HPD"),
468 PINCTRL_PIN(69, "PANEL1_VDDEN"),
469 PINCTRL_PIN(70, "PANEL1_BKLTEN"),
470 PINCTRL_PIN(71, "HV_DDI0_DDC_SCL"),
471 PINCTRL_PIN(72, "PANEL0_VDDEN"),
472 };
473
474 static const struct chv_gpio_pinrange north_gpio_ranges[] = {
475 GPIO_PINRANGE(0, 8),
476 GPIO_PINRANGE(15, 27),
477 GPIO_PINRANGE(30, 41),
478 GPIO_PINRANGE(45, 56),
479 GPIO_PINRANGE(60, 72),
480 };
481
482 static const struct chv_community north_community = {
483 .uid = "2",
484 .pins = north_pins,
485 .npins = ARRAY_SIZE(north_pins),
486 .gpio_ranges = north_gpio_ranges,
487 .ngpio_ranges = ARRAY_SIZE(north_gpio_ranges),
488 /*
489 * North community can generate GPIO interrupts only for the first
490 * 8 interrupts. The upper half (8-15) can only be used to trigger
491 * GPEs.
492 */
493 .nirqs = 8,
494 .acpi_space_id = 0x92,
495 };
496
497 static const struct pinctrl_pin_desc east_pins[] = {
498 PINCTRL_PIN(0, "PMU_SLP_S3_B"),
499 PINCTRL_PIN(1, "PMU_BATLOW_B"),
500 PINCTRL_PIN(2, "SUS_STAT_B"),
501 PINCTRL_PIN(3, "PMU_SLP_S0IX_B"),
502 PINCTRL_PIN(4, "PMU_AC_PRESENT"),
503 PINCTRL_PIN(5, "PMU_PLTRST_B"),
504 PINCTRL_PIN(6, "PMU_SUSCLK"),
505 PINCTRL_PIN(7, "PMU_SLP_LAN_B"),
506 PINCTRL_PIN(8, "PMU_PWRBTN_B"),
507 PINCTRL_PIN(9, "PMU_SLP_S4_B"),
508 PINCTRL_PIN(10, "PMU_WAKE_B"),
509 PINCTRL_PIN(11, "PMU_WAKE_LAN_B"),
510
511 PINCTRL_PIN(15, "MF_ISH_GPIO_3"),
512 PINCTRL_PIN(16, "MF_ISH_GPIO_7"),
513 PINCTRL_PIN(17, "MF_ISH_I2C1_SCL"),
514 PINCTRL_PIN(18, "MF_ISH_GPIO_1"),
515 PINCTRL_PIN(19, "MF_ISH_GPIO_5"),
516 PINCTRL_PIN(20, "MF_ISH_GPIO_9"),
517 PINCTRL_PIN(21, "MF_ISH_GPIO_0"),
518 PINCTRL_PIN(22, "MF_ISH_GPIO_4"),
519 PINCTRL_PIN(23, "MF_ISH_GPIO_8"),
520 PINCTRL_PIN(24, "MF_ISH_GPIO_2"),
521 PINCTRL_PIN(25, "MF_ISH_GPIO_6"),
522 PINCTRL_PIN(26, "MF_ISH_I2C1_SDA"),
523 };
524
525 static const struct chv_gpio_pinrange east_gpio_ranges[] = {
526 GPIO_PINRANGE(0, 11),
527 GPIO_PINRANGE(15, 26),
528 };
529
530 static const struct chv_community east_community = {
531 .uid = "3",
532 .pins = east_pins,
533 .npins = ARRAY_SIZE(east_pins),
534 .gpio_ranges = east_gpio_ranges,
535 .ngpio_ranges = ARRAY_SIZE(east_gpio_ranges),
536 .nirqs = 16,
537 .acpi_space_id = 0x93,
538 };
539
540 static const struct pinctrl_pin_desc southeast_pins[] = {
541 PINCTRL_PIN(0, "MF_PLT_CLK0"),
542 PINCTRL_PIN(1, "PWM1"),
543 PINCTRL_PIN(2, "MF_PLT_CLK1"),
544 PINCTRL_PIN(3, "MF_PLT_CLK4"),
545 PINCTRL_PIN(4, "MF_PLT_CLK3"),
546 PINCTRL_PIN(5, "PWM0"),
547 PINCTRL_PIN(6, "MF_PLT_CLK5"),
548 PINCTRL_PIN(7, "MF_PLT_CLK2"),
549
550 PINCTRL_PIN(15, "SDMMC2_D3_CD_B"),
551 PINCTRL_PIN(16, "SDMMC1_CLK"),
552 PINCTRL_PIN(17, "SDMMC1_D0"),
553 PINCTRL_PIN(18, "SDMMC2_D1"),
554 PINCTRL_PIN(19, "SDMMC2_CLK"),
555 PINCTRL_PIN(20, "SDMMC1_D2"),
556 PINCTRL_PIN(21, "SDMMC2_D2"),
557 PINCTRL_PIN(22, "SDMMC2_CMD"),
558 PINCTRL_PIN(23, "SDMMC1_CMD"),
559 PINCTRL_PIN(24, "SDMMC1_D1"),
560 PINCTRL_PIN(25, "SDMMC2_D0"),
561 PINCTRL_PIN(26, "SDMMC1_D3_CD_B"),
562
563 PINCTRL_PIN(30, "SDMMC3_D1"),
564 PINCTRL_PIN(31, "SDMMC3_CLK"),
565 PINCTRL_PIN(32, "SDMMC3_D3"),
566 PINCTRL_PIN(33, "SDMMC3_D2"),
567 PINCTRL_PIN(34, "SDMMC3_CMD"),
568 PINCTRL_PIN(35, "SDMMC3_D0"),
569
570 PINCTRL_PIN(45, "MF_LPC_AD2"),
571 PINCTRL_PIN(46, "LPC_CLKRUNB"),
572 PINCTRL_PIN(47, "MF_LPC_AD0"),
573 PINCTRL_PIN(48, "LPC_FRAMEB"),
574 PINCTRL_PIN(49, "MF_LPC_CLKOUT1"),
575 PINCTRL_PIN(50, "MF_LPC_AD3"),
576 PINCTRL_PIN(51, "MF_LPC_CLKOUT0"),
577 PINCTRL_PIN(52, "MF_LPC_AD1"),
578
579 PINCTRL_PIN(60, "SPI1_MISO"),
580 PINCTRL_PIN(61, "SPI1_CSO_B"),
581 PINCTRL_PIN(62, "SPI1_CLK"),
582 PINCTRL_PIN(63, "MMC1_D6"),
583 PINCTRL_PIN(64, "SPI1_MOSI"),
584 PINCTRL_PIN(65, "MMC1_D5"),
585 PINCTRL_PIN(66, "SPI1_CS1_B"),
586 PINCTRL_PIN(67, "MMC1_D4_SD_WE"),
587 PINCTRL_PIN(68, "MMC1_D7"),
588 PINCTRL_PIN(69, "MMC1_RCLK"),
589
590 PINCTRL_PIN(75, "USB_OC1_B"),
591 PINCTRL_PIN(76, "PMU_RESETBUTTON_B"),
592 PINCTRL_PIN(77, "GPIO_ALERT"),
593 PINCTRL_PIN(78, "SDMMC3_PWR_EN_B"),
594 PINCTRL_PIN(79, "ILB_SERIRQ"),
595 PINCTRL_PIN(80, "USB_OC0_B"),
596 PINCTRL_PIN(81, "SDMMC3_CD_B"),
597 PINCTRL_PIN(82, "SPKR"),
598 PINCTRL_PIN(83, "SUSPWRDNACK"),
599 PINCTRL_PIN(84, "SPARE_PIN"),
600 PINCTRL_PIN(85, "SDMMC3_1P8_EN"),
601 };
602
603 static const unsigned southeast_pwm0_pins[] = { 5 };
604 static const unsigned southeast_pwm1_pins[] = { 1 };
605 static const unsigned southeast_sdmmc1_pins[] = {
606 16, 17, 20, 23, 24, 26, 63, 65, 67, 68, 69,
607 };
608 static const unsigned southeast_sdmmc2_pins[] = { 15, 18, 19, 21, 22, 25 };
609 static const unsigned southeast_sdmmc3_pins[] = {
610 30, 31, 32, 33, 34, 35, 78, 81, 85,
611 };
612 static const unsigned southeast_spi1_pins[] = { 60, 61, 62, 64, 66 };
613 static const unsigned southeast_spi2_pins[] = { 2, 3, 4, 6, 7 };
614
615 static const struct chv_pingroup southeast_groups[] = {
616 PIN_GROUP("pwm0_grp", southeast_pwm0_pins, 1, false),
617 PIN_GROUP("pwm1_grp", southeast_pwm1_pins, 1, false),
618 PIN_GROUP("sdmmc1_grp", southeast_sdmmc1_pins, 1, false),
619 PIN_GROUP("sdmmc2_grp", southeast_sdmmc2_pins, 1, false),
620 PIN_GROUP("sdmmc3_grp", southeast_sdmmc3_pins, 1, false),
621 PIN_GROUP("spi1_grp", southeast_spi1_pins, 1, false),
622 PIN_GROUP("spi2_grp", southeast_spi2_pins, 4, false),
623 };
624
625 static const char * const southeast_pwm0_groups[] = { "pwm0_grp" };
626 static const char * const southeast_pwm1_groups[] = { "pwm1_grp" };
627 static const char * const southeast_sdmmc1_groups[] = { "sdmmc1_grp" };
628 static const char * const southeast_sdmmc2_groups[] = { "sdmmc2_grp" };
629 static const char * const southeast_sdmmc3_groups[] = { "sdmmc3_grp" };
630 static const char * const southeast_spi1_groups[] = { "spi1_grp" };
631 static const char * const southeast_spi2_groups[] = { "spi2_grp" };
632
633 static const struct chv_function southeast_functions[] = {
634 FUNCTION("pwm0", southeast_pwm0_groups),
635 FUNCTION("pwm1", southeast_pwm1_groups),
636 FUNCTION("sdmmc1", southeast_sdmmc1_groups),
637 FUNCTION("sdmmc2", southeast_sdmmc2_groups),
638 FUNCTION("sdmmc3", southeast_sdmmc3_groups),
639 FUNCTION("spi1", southeast_spi1_groups),
640 FUNCTION("spi2", southeast_spi2_groups),
641 };
642
643 static const struct chv_gpio_pinrange southeast_gpio_ranges[] = {
644 GPIO_PINRANGE(0, 7),
645 GPIO_PINRANGE(15, 26),
646 GPIO_PINRANGE(30, 35),
647 GPIO_PINRANGE(45, 52),
648 GPIO_PINRANGE(60, 69),
649 GPIO_PINRANGE(75, 85),
650 };
651
652 static const struct chv_community southeast_community = {
653 .uid = "4",
654 .pins = southeast_pins,
655 .npins = ARRAY_SIZE(southeast_pins),
656 .groups = southeast_groups,
657 .ngroups = ARRAY_SIZE(southeast_groups),
658 .functions = southeast_functions,
659 .nfunctions = ARRAY_SIZE(southeast_functions),
660 .gpio_ranges = southeast_gpio_ranges,
661 .ngpio_ranges = ARRAY_SIZE(southeast_gpio_ranges),
662 .nirqs = 16,
663 .acpi_space_id = 0x94,
664 };
665
666 static const struct chv_community *chv_communities[] = {
667 &southwest_community,
668 &north_community,
669 &east_community,
670 &southeast_community,
671 };
672
673 /*
674 * Lock to serialize register accesses
675 *
676 * Due to a silicon issue, a shared lock must be used to prevent
677 * concurrent accesses across the 4 GPIO controllers.
678 *
679 * See Intel Atom Z8000 Processor Series Specification Update (Rev. 005),
680 * errata #CHT34, for further information.
681 */
682 static DEFINE_RAW_SPINLOCK(chv_lock);
683
684 static void __iomem *chv_padreg(struct chv_pinctrl *pctrl, unsigned offset,
685 unsigned reg)
686 {
687 unsigned family_no = offset / MAX_FAMILY_PAD_GPIO_NO;
688 unsigned pad_no = offset % MAX_FAMILY_PAD_GPIO_NO;
689
690 offset = FAMILY_PAD_REGS_OFF + FAMILY_PAD_REGS_SIZE * family_no +
691 GPIO_REGS_SIZE * pad_no;
692
693 return pctrl->regs + offset + reg;
694 }
695
696 static void chv_writel(u32 value, void __iomem *reg)
697 {
698 writel(value, reg);
699 /* simple readback to confirm the bus transferring done */
700 readl(reg);
701 }
702
703 /* When Pad Cfg is locked, driver can only change GPIOTXState or GPIORXState */
704 static bool chv_pad_locked(struct chv_pinctrl *pctrl, unsigned offset)
705 {
706 void __iomem *reg;
707
708 reg = chv_padreg(pctrl, offset, CHV_PADCTRL1);
709 return readl(reg) & CHV_PADCTRL1_CFGLOCK;
710 }
711
712 static int chv_get_groups_count(struct pinctrl_dev *pctldev)
713 {
714 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
715
716 return pctrl->community->ngroups;
717 }
718
719 static const char *chv_get_group_name(struct pinctrl_dev *pctldev,
720 unsigned group)
721 {
722 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
723
724 return pctrl->community->groups[group].name;
725 }
726
727 static int chv_get_group_pins(struct pinctrl_dev *pctldev, unsigned group,
728 const unsigned **pins, unsigned *npins)
729 {
730 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
731
732 *pins = pctrl->community->groups[group].pins;
733 *npins = pctrl->community->groups[group].npins;
734 return 0;
735 }
736
737 static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
738 unsigned offset)
739 {
740 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
741 unsigned long flags;
742 u32 ctrl0, ctrl1;
743 bool locked;
744
745 raw_spin_lock_irqsave(&chv_lock, flags);
746
747 ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
748 ctrl1 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL1));
749 locked = chv_pad_locked(pctrl, offset);
750
751 raw_spin_unlock_irqrestore(&chv_lock, flags);
752
753 if (ctrl0 & CHV_PADCTRL0_GPIOEN) {
754 seq_puts(s, "GPIO ");
755 } else {
756 u32 mode;
757
758 mode = ctrl0 & CHV_PADCTRL0_PMODE_MASK;
759 mode >>= CHV_PADCTRL0_PMODE_SHIFT;
760
761 seq_printf(s, "mode %d ", mode);
762 }
763
764 seq_printf(s, "0x%08x 0x%08x", ctrl0, ctrl1);
765
766 if (locked)
767 seq_puts(s, " [LOCKED]");
768 }
769
770 static const struct pinctrl_ops chv_pinctrl_ops = {
771 .get_groups_count = chv_get_groups_count,
772 .get_group_name = chv_get_group_name,
773 .get_group_pins = chv_get_group_pins,
774 .pin_dbg_show = chv_pin_dbg_show,
775 };
776
777 static int chv_get_functions_count(struct pinctrl_dev *pctldev)
778 {
779 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
780
781 return pctrl->community->nfunctions;
782 }
783
784 static const char *chv_get_function_name(struct pinctrl_dev *pctldev,
785 unsigned function)
786 {
787 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
788
789 return pctrl->community->functions[function].name;
790 }
791
792 static int chv_get_function_groups(struct pinctrl_dev *pctldev,
793 unsigned function,
794 const char * const **groups,
795 unsigned * const ngroups)
796 {
797 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
798
799 *groups = pctrl->community->functions[function].groups;
800 *ngroups = pctrl->community->functions[function].ngroups;
801 return 0;
802 }
803
804 static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned function,
805 unsigned group)
806 {
807 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
808 const struct chv_pingroup *grp;
809 unsigned long flags;
810 int i;
811
812 grp = &pctrl->community->groups[group];
813
814 raw_spin_lock_irqsave(&chv_lock, flags);
815
816 /* Check first that the pad is not locked */
817 for (i = 0; i < grp->npins; i++) {
818 if (chv_pad_locked(pctrl, grp->pins[i])) {
819 dev_warn(pctrl->dev, "unable to set mode for locked pin %u\n",
820 grp->pins[i]);
821 raw_spin_unlock_irqrestore(&chv_lock, flags);
822 return -EBUSY;
823 }
824 }
825
826 for (i = 0; i < grp->npins; i++) {
827 const struct chv_alternate_function *altfunc = &grp->altfunc;
828 int pin = grp->pins[i];
829 void __iomem *reg;
830 u32 value;
831
832 /* Check if there is pin-specific config */
833 if (grp->overrides) {
834 int j;
835
836 for (j = 0; j < grp->noverrides; j++) {
837 if (grp->overrides[j].pin == pin) {
838 altfunc = &grp->overrides[j];
839 break;
840 }
841 }
842 }
843
844 reg = chv_padreg(pctrl, pin, CHV_PADCTRL0);
845 value = readl(reg);
846 /* Disable GPIO mode */
847 value &= ~CHV_PADCTRL0_GPIOEN;
848 /* Set to desired mode */
849 value &= ~CHV_PADCTRL0_PMODE_MASK;
850 value |= altfunc->mode << CHV_PADCTRL0_PMODE_SHIFT;
851 chv_writel(value, reg);
852
853 /* Update for invert_oe */
854 reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
855 value = readl(reg) & ~CHV_PADCTRL1_INVRXTX_MASK;
856 if (altfunc->invert_oe)
857 value |= CHV_PADCTRL1_INVRXTX_TXENABLE;
858 chv_writel(value, reg);
859
860 dev_dbg(pctrl->dev, "configured pin %u mode %u OE %sinverted\n",
861 pin, altfunc->mode, altfunc->invert_oe ? "" : "not ");
862 }
863
864 raw_spin_unlock_irqrestore(&chv_lock, flags);
865
866 return 0;
867 }
868
869 static int chv_gpio_request_enable(struct pinctrl_dev *pctldev,
870 struct pinctrl_gpio_range *range,
871 unsigned offset)
872 {
873 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
874 unsigned long flags;
875 void __iomem *reg;
876 u32 value;
877
878 raw_spin_lock_irqsave(&chv_lock, flags);
879
880 if (chv_pad_locked(pctrl, offset)) {
881 value = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
882 if (!(value & CHV_PADCTRL0_GPIOEN)) {
883 /* Locked so cannot enable */
884 raw_spin_unlock_irqrestore(&chv_lock, flags);
885 return -EBUSY;
886 }
887 } else {
888 int i;
889
890 /* Reset the interrupt mapping */
891 for (i = 0; i < ARRAY_SIZE(pctrl->intr_lines); i++) {
892 if (pctrl->intr_lines[i] == offset) {
893 pctrl->intr_lines[i] = 0;
894 break;
895 }
896 }
897
898 /* Disable interrupt generation */
899 reg = chv_padreg(pctrl, offset, CHV_PADCTRL1);
900 value = readl(reg);
901 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
902 value &= ~CHV_PADCTRL1_INVRXTX_MASK;
903 chv_writel(value, reg);
904
905 reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
906 value = readl(reg);
907
908 /*
909 * If the pin is in HiZ mode (both TX and RX buffers are
910 * disabled) we turn it to be input now.
911 */
912 if ((value & CHV_PADCTRL0_GPIOCFG_MASK) ==
913 (CHV_PADCTRL0_GPIOCFG_HIZ << CHV_PADCTRL0_GPIOCFG_SHIFT)) {
914 value &= ~CHV_PADCTRL0_GPIOCFG_MASK;
915 value |= CHV_PADCTRL0_GPIOCFG_GPI <<
916 CHV_PADCTRL0_GPIOCFG_SHIFT;
917 }
918
919 /* Switch to a GPIO mode */
920 value |= CHV_PADCTRL0_GPIOEN;
921 chv_writel(value, reg);
922 }
923
924 raw_spin_unlock_irqrestore(&chv_lock, flags);
925
926 return 0;
927 }
928
929 static void chv_gpio_disable_free(struct pinctrl_dev *pctldev,
930 struct pinctrl_gpio_range *range,
931 unsigned offset)
932 {
933 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
934 unsigned long flags;
935 void __iomem *reg;
936 u32 value;
937
938 raw_spin_lock_irqsave(&chv_lock, flags);
939
940 reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
941 value = readl(reg) & ~CHV_PADCTRL0_GPIOEN;
942 chv_writel(value, reg);
943
944 raw_spin_unlock_irqrestore(&chv_lock, flags);
945 }
946
947 static int chv_gpio_set_direction(struct pinctrl_dev *pctldev,
948 struct pinctrl_gpio_range *range,
949 unsigned offset, bool input)
950 {
951 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
952 void __iomem *reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
953 unsigned long flags;
954 u32 ctrl0;
955
956 raw_spin_lock_irqsave(&chv_lock, flags);
957
958 ctrl0 = readl(reg) & ~CHV_PADCTRL0_GPIOCFG_MASK;
959 if (input)
960 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT;
961 else
962 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPO << CHV_PADCTRL0_GPIOCFG_SHIFT;
963 chv_writel(ctrl0, reg);
964
965 raw_spin_unlock_irqrestore(&chv_lock, flags);
966
967 return 0;
968 }
969
970 static const struct pinmux_ops chv_pinmux_ops = {
971 .get_functions_count = chv_get_functions_count,
972 .get_function_name = chv_get_function_name,
973 .get_function_groups = chv_get_function_groups,
974 .set_mux = chv_pinmux_set_mux,
975 .gpio_request_enable = chv_gpio_request_enable,
976 .gpio_disable_free = chv_gpio_disable_free,
977 .gpio_set_direction = chv_gpio_set_direction,
978 };
979
980 static int chv_config_get(struct pinctrl_dev *pctldev, unsigned pin,
981 unsigned long *config)
982 {
983 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
984 enum pin_config_param param = pinconf_to_config_param(*config);
985 unsigned long flags;
986 u32 ctrl0, ctrl1;
987 u16 arg = 0;
988 u32 term;
989
990 raw_spin_lock_irqsave(&chv_lock, flags);
991 ctrl0 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
992 ctrl1 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL1));
993 raw_spin_unlock_irqrestore(&chv_lock, flags);
994
995 term = (ctrl0 & CHV_PADCTRL0_TERM_MASK) >> CHV_PADCTRL0_TERM_SHIFT;
996
997 switch (param) {
998 case PIN_CONFIG_BIAS_DISABLE:
999 if (term)
1000 return -EINVAL;
1001 break;
1002
1003 case PIN_CONFIG_BIAS_PULL_UP:
1004 if (!(ctrl0 & CHV_PADCTRL0_TERM_UP))
1005 return -EINVAL;
1006
1007 switch (term) {
1008 case CHV_PADCTRL0_TERM_20K:
1009 arg = 20000;
1010 break;
1011 case CHV_PADCTRL0_TERM_5K:
1012 arg = 5000;
1013 break;
1014 case CHV_PADCTRL0_TERM_1K:
1015 arg = 1000;
1016 break;
1017 }
1018
1019 break;
1020
1021 case PIN_CONFIG_BIAS_PULL_DOWN:
1022 if (!term || (ctrl0 & CHV_PADCTRL0_TERM_UP))
1023 return -EINVAL;
1024
1025 switch (term) {
1026 case CHV_PADCTRL0_TERM_20K:
1027 arg = 20000;
1028 break;
1029 case CHV_PADCTRL0_TERM_5K:
1030 arg = 5000;
1031 break;
1032 }
1033
1034 break;
1035
1036 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
1037 if (!(ctrl1 & CHV_PADCTRL1_ODEN))
1038 return -EINVAL;
1039 break;
1040
1041 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: {
1042 u32 cfg;
1043
1044 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1045 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1046 if (cfg != CHV_PADCTRL0_GPIOCFG_HIZ)
1047 return -EINVAL;
1048
1049 break;
1050 }
1051
1052 default:
1053 return -ENOTSUPP;
1054 }
1055
1056 *config = pinconf_to_config_packed(param, arg);
1057 return 0;
1058 }
1059
1060 static int chv_config_set_pull(struct chv_pinctrl *pctrl, unsigned pin,
1061 enum pin_config_param param, u32 arg)
1062 {
1063 void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL0);
1064 unsigned long flags;
1065 u32 ctrl0, pull;
1066
1067 raw_spin_lock_irqsave(&chv_lock, flags);
1068 ctrl0 = readl(reg);
1069
1070 switch (param) {
1071 case PIN_CONFIG_BIAS_DISABLE:
1072 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1073 break;
1074
1075 case PIN_CONFIG_BIAS_PULL_UP:
1076 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1077
1078 switch (arg) {
1079 case 1000:
1080 /* For 1k there is only pull up */
1081 pull = CHV_PADCTRL0_TERM_1K << CHV_PADCTRL0_TERM_SHIFT;
1082 break;
1083 case 5000:
1084 pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
1085 break;
1086 case 20000:
1087 pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
1088 break;
1089 default:
1090 raw_spin_unlock_irqrestore(&chv_lock, flags);
1091 return -EINVAL;
1092 }
1093
1094 ctrl0 |= CHV_PADCTRL0_TERM_UP | pull;
1095 break;
1096
1097 case PIN_CONFIG_BIAS_PULL_DOWN:
1098 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1099
1100 switch (arg) {
1101 case 5000:
1102 pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
1103 break;
1104 case 20000:
1105 pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
1106 break;
1107 default:
1108 raw_spin_unlock_irqrestore(&chv_lock, flags);
1109 return -EINVAL;
1110 }
1111
1112 ctrl0 |= pull;
1113 break;
1114
1115 default:
1116 raw_spin_unlock_irqrestore(&chv_lock, flags);
1117 return -EINVAL;
1118 }
1119
1120 chv_writel(ctrl0, reg);
1121 raw_spin_unlock_irqrestore(&chv_lock, flags);
1122
1123 return 0;
1124 }
1125
1126 static int chv_config_set_oden(struct chv_pinctrl *pctrl, unsigned int pin,
1127 bool enable)
1128 {
1129 void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
1130 unsigned long flags;
1131 u32 ctrl1;
1132
1133 raw_spin_lock_irqsave(&chv_lock, flags);
1134 ctrl1 = readl(reg);
1135
1136 if (enable)
1137 ctrl1 |= CHV_PADCTRL1_ODEN;
1138 else
1139 ctrl1 &= ~CHV_PADCTRL1_ODEN;
1140
1141 chv_writel(ctrl1, reg);
1142 raw_spin_unlock_irqrestore(&chv_lock, flags);
1143
1144 return 0;
1145 }
1146
1147 static int chv_config_set(struct pinctrl_dev *pctldev, unsigned pin,
1148 unsigned long *configs, unsigned nconfigs)
1149 {
1150 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
1151 enum pin_config_param param;
1152 int i, ret;
1153 u32 arg;
1154
1155 if (chv_pad_locked(pctrl, pin))
1156 return -EBUSY;
1157
1158 for (i = 0; i < nconfigs; i++) {
1159 param = pinconf_to_config_param(configs[i]);
1160 arg = pinconf_to_config_argument(configs[i]);
1161
1162 switch (param) {
1163 case PIN_CONFIG_BIAS_DISABLE:
1164 case PIN_CONFIG_BIAS_PULL_UP:
1165 case PIN_CONFIG_BIAS_PULL_DOWN:
1166 ret = chv_config_set_pull(pctrl, pin, param, arg);
1167 if (ret)
1168 return ret;
1169 break;
1170
1171 case PIN_CONFIG_DRIVE_PUSH_PULL:
1172 ret = chv_config_set_oden(pctrl, pin, false);
1173 if (ret)
1174 return ret;
1175 break;
1176
1177 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
1178 ret = chv_config_set_oden(pctrl, pin, true);
1179 if (ret)
1180 return ret;
1181 break;
1182
1183 default:
1184 return -ENOTSUPP;
1185 }
1186
1187 dev_dbg(pctrl->dev, "pin %d set config %d arg %u\n", pin,
1188 param, arg);
1189 }
1190
1191 return 0;
1192 }
1193
1194 static int chv_config_group_get(struct pinctrl_dev *pctldev,
1195 unsigned int group,
1196 unsigned long *config)
1197 {
1198 const unsigned int *pins;
1199 unsigned int npins;
1200 int ret;
1201
1202 ret = chv_get_group_pins(pctldev, group, &pins, &npins);
1203 if (ret)
1204 return ret;
1205
1206 ret = chv_config_get(pctldev, pins[0], config);
1207 if (ret)
1208 return ret;
1209
1210 return 0;
1211 }
1212
1213 static int chv_config_group_set(struct pinctrl_dev *pctldev,
1214 unsigned int group, unsigned long *configs,
1215 unsigned int num_configs)
1216 {
1217 const unsigned int *pins;
1218 unsigned int npins;
1219 int i, ret;
1220
1221 ret = chv_get_group_pins(pctldev, group, &pins, &npins);
1222 if (ret)
1223 return ret;
1224
1225 for (i = 0; i < npins; i++) {
1226 ret = chv_config_set(pctldev, pins[i], configs, num_configs);
1227 if (ret)
1228 return ret;
1229 }
1230
1231 return 0;
1232 }
1233
1234 static const struct pinconf_ops chv_pinconf_ops = {
1235 .is_generic = true,
1236 .pin_config_set = chv_config_set,
1237 .pin_config_get = chv_config_get,
1238 .pin_config_group_get = chv_config_group_get,
1239 .pin_config_group_set = chv_config_group_set,
1240 };
1241
1242 static struct pinctrl_desc chv_pinctrl_desc = {
1243 .pctlops = &chv_pinctrl_ops,
1244 .pmxops = &chv_pinmux_ops,
1245 .confops = &chv_pinconf_ops,
1246 .owner = THIS_MODULE,
1247 };
1248
1249 static int chv_gpio_get(struct gpio_chip *chip, unsigned offset)
1250 {
1251 struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
1252 unsigned long flags;
1253 u32 ctrl0, cfg;
1254
1255 raw_spin_lock_irqsave(&chv_lock, flags);
1256 ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
1257 raw_spin_unlock_irqrestore(&chv_lock, flags);
1258
1259 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1260 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1261
1262 if (cfg == CHV_PADCTRL0_GPIOCFG_GPO)
1263 return !!(ctrl0 & CHV_PADCTRL0_GPIOTXSTATE);
1264 return !!(ctrl0 & CHV_PADCTRL0_GPIORXSTATE);
1265 }
1266
1267 static void chv_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
1268 {
1269 struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
1270 unsigned long flags;
1271 void __iomem *reg;
1272 u32 ctrl0;
1273
1274 raw_spin_lock_irqsave(&chv_lock, flags);
1275
1276 reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
1277 ctrl0 = readl(reg);
1278
1279 if (value)
1280 ctrl0 |= CHV_PADCTRL0_GPIOTXSTATE;
1281 else
1282 ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE;
1283
1284 chv_writel(ctrl0, reg);
1285
1286 raw_spin_unlock_irqrestore(&chv_lock, flags);
1287 }
1288
1289 static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
1290 {
1291 struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
1292 u32 ctrl0, direction;
1293 unsigned long flags;
1294
1295 raw_spin_lock_irqsave(&chv_lock, flags);
1296 ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
1297 raw_spin_unlock_irqrestore(&chv_lock, flags);
1298
1299 direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1300 direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1301
1302 return direction != CHV_PADCTRL0_GPIOCFG_GPO;
1303 }
1304
1305 static int chv_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
1306 {
1307 return pinctrl_gpio_direction_input(chip->base + offset);
1308 }
1309
1310 static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
1311 int value)
1312 {
1313 chv_gpio_set(chip, offset, value);
1314 return pinctrl_gpio_direction_output(chip->base + offset);
1315 }
1316
1317 static const struct gpio_chip chv_gpio_chip = {
1318 .owner = THIS_MODULE,
1319 .request = gpiochip_generic_request,
1320 .free = gpiochip_generic_free,
1321 .get_direction = chv_gpio_get_direction,
1322 .direction_input = chv_gpio_direction_input,
1323 .direction_output = chv_gpio_direction_output,
1324 .get = chv_gpio_get,
1325 .set = chv_gpio_set,
1326 };
1327
1328 static void chv_gpio_irq_ack(struct irq_data *d)
1329 {
1330 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1331 struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1332 int pin = irqd_to_hwirq(d);
1333 u32 intr_line;
1334
1335 raw_spin_lock(&chv_lock);
1336
1337 intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1338 intr_line &= CHV_PADCTRL0_INTSEL_MASK;
1339 intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
1340 chv_writel(BIT(intr_line), pctrl->regs + CHV_INTSTAT);
1341
1342 raw_spin_unlock(&chv_lock);
1343 }
1344
1345 static void chv_gpio_irq_mask_unmask(struct irq_data *d, bool mask)
1346 {
1347 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1348 struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1349 int pin = irqd_to_hwirq(d);
1350 u32 value, intr_line;
1351 unsigned long flags;
1352
1353 raw_spin_lock_irqsave(&chv_lock, flags);
1354
1355 intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1356 intr_line &= CHV_PADCTRL0_INTSEL_MASK;
1357 intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
1358
1359 value = readl(pctrl->regs + CHV_INTMASK);
1360 if (mask)
1361 value &= ~BIT(intr_line);
1362 else
1363 value |= BIT(intr_line);
1364 chv_writel(value, pctrl->regs + CHV_INTMASK);
1365
1366 raw_spin_unlock_irqrestore(&chv_lock, flags);
1367 }
1368
1369 static void chv_gpio_irq_mask(struct irq_data *d)
1370 {
1371 chv_gpio_irq_mask_unmask(d, true);
1372 }
1373
1374 static void chv_gpio_irq_unmask(struct irq_data *d)
1375 {
1376 chv_gpio_irq_mask_unmask(d, false);
1377 }
1378
1379 static unsigned chv_gpio_irq_startup(struct irq_data *d)
1380 {
1381 /*
1382 * Check if the interrupt has been requested with 0 as triggering
1383 * type. In that case it is assumed that the current values
1384 * programmed to the hardware are used (e.g BIOS configured
1385 * defaults).
1386 *
1387 * In that case ->irq_set_type() will never be called so we need to
1388 * read back the values from hardware now, set correct flow handler
1389 * and update mappings before the interrupt is being used.
1390 */
1391 if (irqd_get_trigger_type(d) == IRQ_TYPE_NONE) {
1392 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1393 struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1394 unsigned pin = irqd_to_hwirq(d);
1395 irq_flow_handler_t handler;
1396 unsigned long flags;
1397 u32 intsel, value;
1398
1399 raw_spin_lock_irqsave(&chv_lock, flags);
1400 intsel = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1401 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1402 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1403
1404 value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL1));
1405 if (value & CHV_PADCTRL1_INTWAKECFG_LEVEL)
1406 handler = handle_level_irq;
1407 else
1408 handler = handle_edge_irq;
1409
1410 if (!pctrl->intr_lines[intsel]) {
1411 irq_set_handler_locked(d, handler);
1412 pctrl->intr_lines[intsel] = pin;
1413 }
1414 raw_spin_unlock_irqrestore(&chv_lock, flags);
1415 }
1416
1417 chv_gpio_irq_unmask(d);
1418 return 0;
1419 }
1420
1421 static int chv_gpio_irq_type(struct irq_data *d, unsigned type)
1422 {
1423 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1424 struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1425 unsigned pin = irqd_to_hwirq(d);
1426 unsigned long flags;
1427 u32 value;
1428
1429 raw_spin_lock_irqsave(&chv_lock, flags);
1430
1431 /*
1432 * Pins which can be used as shared interrupt are configured in
1433 * BIOS. Driver trusts BIOS configurations and assigns different
1434 * handler according to the irq type.
1435 *
1436 * Driver needs to save the mapping between each pin and
1437 * its interrupt line.
1438 * 1. If the pin cfg is locked in BIOS:
1439 * Trust BIOS has programmed IntWakeCfg bits correctly,
1440 * driver just needs to save the mapping.
1441 * 2. If the pin cfg is not locked in BIOS:
1442 * Driver programs the IntWakeCfg bits and save the mapping.
1443 */
1444 if (!chv_pad_locked(pctrl, pin)) {
1445 void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
1446
1447 value = readl(reg);
1448 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
1449 value &= ~CHV_PADCTRL1_INVRXTX_MASK;
1450
1451 if (type & IRQ_TYPE_EDGE_BOTH) {
1452 if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
1453 value |= CHV_PADCTRL1_INTWAKECFG_BOTH;
1454 else if (type & IRQ_TYPE_EDGE_RISING)
1455 value |= CHV_PADCTRL1_INTWAKECFG_RISING;
1456 else if (type & IRQ_TYPE_EDGE_FALLING)
1457 value |= CHV_PADCTRL1_INTWAKECFG_FALLING;
1458 } else if (type & IRQ_TYPE_LEVEL_MASK) {
1459 value |= CHV_PADCTRL1_INTWAKECFG_LEVEL;
1460 if (type & IRQ_TYPE_LEVEL_LOW)
1461 value |= CHV_PADCTRL1_INVRXTX_RXDATA;
1462 }
1463
1464 chv_writel(value, reg);
1465 }
1466
1467 value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1468 value &= CHV_PADCTRL0_INTSEL_MASK;
1469 value >>= CHV_PADCTRL0_INTSEL_SHIFT;
1470
1471 pctrl->intr_lines[value] = pin;
1472
1473 if (type & IRQ_TYPE_EDGE_BOTH)
1474 irq_set_handler_locked(d, handle_edge_irq);
1475 else if (type & IRQ_TYPE_LEVEL_MASK)
1476 irq_set_handler_locked(d, handle_level_irq);
1477
1478 raw_spin_unlock_irqrestore(&chv_lock, flags);
1479
1480 return 0;
1481 }
1482
1483 static struct irq_chip chv_gpio_irqchip = {
1484 .name = "chv-gpio",
1485 .irq_startup = chv_gpio_irq_startup,
1486 .irq_ack = chv_gpio_irq_ack,
1487 .irq_mask = chv_gpio_irq_mask,
1488 .irq_unmask = chv_gpio_irq_unmask,
1489 .irq_set_type = chv_gpio_irq_type,
1490 .flags = IRQCHIP_SKIP_SET_WAKE,
1491 };
1492
1493 static void chv_gpio_irq_handler(struct irq_desc *desc)
1494 {
1495 struct gpio_chip *gc = irq_desc_get_handler_data(desc);
1496 struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1497 struct irq_chip *chip = irq_desc_get_chip(desc);
1498 unsigned long pending;
1499 u32 intr_line;
1500
1501 chained_irq_enter(chip, desc);
1502
1503 pending = readl(pctrl->regs + CHV_INTSTAT);
1504 for_each_set_bit(intr_line, &pending, pctrl->community->nirqs) {
1505 unsigned irq, offset;
1506
1507 offset = pctrl->intr_lines[intr_line];
1508 irq = irq_find_mapping(gc->irq.domain, offset);
1509 generic_handle_irq(irq);
1510 }
1511
1512 chained_irq_exit(chip, desc);
1513 }
1514
1515 /*
1516 * Certain machines seem to hardcode Linux IRQ numbers in their ACPI
1517 * tables. Since we leave GPIOs that are not capable of generating
1518 * interrupts out of the irqdomain the numbering will be different and
1519 * cause devices using the hardcoded IRQ numbers fail. In order not to
1520 * break such machines we will only mask pins from irqdomain if the machine
1521 * is not listed below.
1522 */
1523 static const struct dmi_system_id chv_no_valid_mask[] = {
1524 /* See https://bugzilla.kernel.org/show_bug.cgi?id=194945 */
1525 {
1526 .ident = "Intel_Strago based Chromebooks (All models)",
1527 .matches = {
1528 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1529 DMI_MATCH(DMI_PRODUCT_FAMILY, "Intel_Strago"),
1530 },
1531 },
1532 {
1533 .ident = "HP Chromebook 11 G5 (Setzer)",
1534 .matches = {
1535 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
1536 DMI_MATCH(DMI_PRODUCT_NAME, "Setzer"),
1537 },
1538 },
1539 {
1540 .ident = "Acer Chromebook R11 (Cyan)",
1541 .matches = {
1542 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1543 DMI_MATCH(DMI_PRODUCT_NAME, "Cyan"),
1544 },
1545 },
1546 {
1547 .ident = "Samsung Chromebook 3 (Celes)",
1548 .matches = {
1549 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1550 DMI_MATCH(DMI_PRODUCT_NAME, "Celes"),
1551 },
1552 },
1553 {}
1554 };
1555
1556 static int chv_gpio_probe(struct chv_pinctrl *pctrl, int irq)
1557 {
1558 const struct chv_gpio_pinrange *range;
1559 struct gpio_chip *chip = &pctrl->chip;
1560 bool need_valid_mask = !dmi_check_system(chv_no_valid_mask);
1561 const struct chv_community *community = pctrl->community;
1562 int ret, i, irq_base;
1563
1564 *chip = chv_gpio_chip;
1565
1566 chip->ngpio = community->pins[community->npins - 1].number + 1;
1567 chip->label = dev_name(pctrl->dev);
1568 chip->parent = pctrl->dev;
1569 chip->base = -1;
1570 chip->irq.need_valid_mask = need_valid_mask;
1571
1572 ret = devm_gpiochip_add_data(pctrl->dev, chip, pctrl);
1573 if (ret) {
1574 dev_err(pctrl->dev, "Failed to register gpiochip\n");
1575 return ret;
1576 }
1577
1578 for (i = 0; i < community->ngpio_ranges; i++) {
1579 range = &community->gpio_ranges[i];
1580 ret = gpiochip_add_pin_range(chip, dev_name(pctrl->dev),
1581 range->base, range->base,
1582 range->npins);
1583 if (ret) {
1584 dev_err(pctrl->dev, "failed to add GPIO pin range\n");
1585 return ret;
1586 }
1587 }
1588
1589 /* Do not add GPIOs that can only generate GPEs to the IRQ domain */
1590 for (i = 0; i < community->npins; i++) {
1591 const struct pinctrl_pin_desc *desc;
1592 u32 intsel;
1593
1594 desc = &community->pins[i];
1595
1596 intsel = readl(chv_padreg(pctrl, desc->number, CHV_PADCTRL0));
1597 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1598 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1599
1600 if (need_valid_mask && intsel >= community->nirqs)
1601 clear_bit(desc->number, chip->irq.valid_mask);
1602 }
1603
1604 /*
1605 * The same set of machines in chv_no_valid_mask[] have incorrectly
1606 * configured GPIOs that generate spurious interrupts so we use
1607 * this same list to apply another quirk for them.
1608 *
1609 * See also https://bugzilla.kernel.org/show_bug.cgi?id=197953.
1610 */
1611 if (!need_valid_mask) {
1612 /*
1613 * Mask all interrupts the community is able to generate
1614 * but leave the ones that can only generate GPEs unmasked.
1615 */
1616 chv_writel(GENMASK(31, pctrl->community->nirqs),
1617 pctrl->regs + CHV_INTMASK);
1618 }
1619
1620 /* Clear all interrupts */
1621 chv_writel(0xffff, pctrl->regs + CHV_INTSTAT);
1622
1623 if (!need_valid_mask) {
1624 irq_base = devm_irq_alloc_descs(pctrl->dev, -1, 0,
1625 community->npins, NUMA_NO_NODE);
1626 if (irq_base < 0) {
1627 dev_err(pctrl->dev, "Failed to allocate IRQ numbers\n");
1628 return irq_base;
1629 }
1630 }
1631
1632 ret = gpiochip_irqchip_add(chip, &chv_gpio_irqchip, 0,
1633 handle_bad_irq, IRQ_TYPE_NONE);
1634 if (ret) {
1635 dev_err(pctrl->dev, "failed to add IRQ chip\n");
1636 return ret;
1637 }
1638
1639 if (!need_valid_mask) {
1640 for (i = 0; i < community->ngpio_ranges; i++) {
1641 range = &community->gpio_ranges[i];
1642
1643 irq_domain_associate_many(chip->irq.domain, irq_base,
1644 range->base, range->npins);
1645 irq_base += range->npins;
1646 }
1647 }
1648
1649 gpiochip_set_chained_irqchip(chip, &chv_gpio_irqchip, irq,
1650 chv_gpio_irq_handler);
1651 return 0;
1652 }
1653
1654 static acpi_status chv_pinctrl_mmio_access_handler(u32 function,
1655 acpi_physical_address address, u32 bits, u64 *value,
1656 void *handler_context, void *region_context)
1657 {
1658 struct chv_pinctrl *pctrl = region_context;
1659 unsigned long flags;
1660 acpi_status ret = AE_OK;
1661
1662 raw_spin_lock_irqsave(&chv_lock, flags);
1663
1664 if (function == ACPI_WRITE)
1665 chv_writel((u32)(*value), pctrl->regs + (u32)address);
1666 else if (function == ACPI_READ)
1667 *value = readl(pctrl->regs + (u32)address);
1668 else
1669 ret = AE_BAD_PARAMETER;
1670
1671 raw_spin_unlock_irqrestore(&chv_lock, flags);
1672
1673 return ret;
1674 }
1675
1676 static int chv_pinctrl_probe(struct platform_device *pdev)
1677 {
1678 struct chv_pinctrl *pctrl;
1679 struct acpi_device *adev;
1680 struct resource *res;
1681 acpi_status status;
1682 int ret, irq, i;
1683
1684 adev = ACPI_COMPANION(&pdev->dev);
1685 if (!adev)
1686 return -ENODEV;
1687
1688 pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
1689 if (!pctrl)
1690 return -ENOMEM;
1691
1692 for (i = 0; i < ARRAY_SIZE(chv_communities); i++)
1693 if (!strcmp(adev->pnp.unique_id, chv_communities[i]->uid)) {
1694 pctrl->community = chv_communities[i];
1695 break;
1696 }
1697 if (i == ARRAY_SIZE(chv_communities))
1698 return -ENODEV;
1699
1700 pctrl->dev = &pdev->dev;
1701
1702 #ifdef CONFIG_PM_SLEEP
1703 pctrl->saved_pin_context = devm_kcalloc(pctrl->dev,
1704 pctrl->community->npins, sizeof(*pctrl->saved_pin_context),
1705 GFP_KERNEL);
1706 if (!pctrl->saved_pin_context)
1707 return -ENOMEM;
1708 #endif
1709
1710 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1711 pctrl->regs = devm_ioremap_resource(&pdev->dev, res);
1712 if (IS_ERR(pctrl->regs))
1713 return PTR_ERR(pctrl->regs);
1714
1715 irq = platform_get_irq(pdev, 0);
1716 if (irq < 0) {
1717 dev_err(&pdev->dev, "failed to get interrupt number\n");
1718 return irq;
1719 }
1720
1721 pctrl->pctldesc = chv_pinctrl_desc;
1722 pctrl->pctldesc.name = dev_name(&pdev->dev);
1723 pctrl->pctldesc.pins = pctrl->community->pins;
1724 pctrl->pctldesc.npins = pctrl->community->npins;
1725
1726 pctrl->pctldev = devm_pinctrl_register(&pdev->dev, &pctrl->pctldesc,
1727 pctrl);
1728 if (IS_ERR(pctrl->pctldev)) {
1729 dev_err(&pdev->dev, "failed to register pinctrl driver\n");
1730 return PTR_ERR(pctrl->pctldev);
1731 }
1732
1733 ret = chv_gpio_probe(pctrl, irq);
1734 if (ret)
1735 return ret;
1736
1737 status = acpi_install_address_space_handler(adev->handle,
1738 pctrl->community->acpi_space_id,
1739 chv_pinctrl_mmio_access_handler,
1740 NULL, pctrl);
1741 if (ACPI_FAILURE(status))
1742 dev_err(&pdev->dev, "failed to install ACPI addr space handler\n");
1743
1744 platform_set_drvdata(pdev, pctrl);
1745
1746 return 0;
1747 }
1748
1749 static int chv_pinctrl_remove(struct platform_device *pdev)
1750 {
1751 struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
1752
1753 acpi_remove_address_space_handler(ACPI_COMPANION(&pdev->dev),
1754 pctrl->community->acpi_space_id,
1755 chv_pinctrl_mmio_access_handler);
1756
1757 return 0;
1758 }
1759
1760 #ifdef CONFIG_PM_SLEEP
1761 static int chv_pinctrl_suspend_noirq(struct device *dev)
1762 {
1763 struct platform_device *pdev = to_platform_device(dev);
1764 struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
1765 unsigned long flags;
1766 int i;
1767
1768 raw_spin_lock_irqsave(&chv_lock, flags);
1769
1770 pctrl->saved_intmask = readl(pctrl->regs + CHV_INTMASK);
1771
1772 for (i = 0; i < pctrl->community->npins; i++) {
1773 const struct pinctrl_pin_desc *desc;
1774 struct chv_pin_context *ctx;
1775 void __iomem *reg;
1776
1777 desc = &pctrl->community->pins[i];
1778 if (chv_pad_locked(pctrl, desc->number))
1779 continue;
1780
1781 ctx = &pctrl->saved_pin_context[i];
1782
1783 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0);
1784 ctx->padctrl0 = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE;
1785
1786 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1);
1787 ctx->padctrl1 = readl(reg);
1788 }
1789
1790 raw_spin_unlock_irqrestore(&chv_lock, flags);
1791
1792 return 0;
1793 }
1794
1795 static int chv_pinctrl_resume_noirq(struct device *dev)
1796 {
1797 struct platform_device *pdev = to_platform_device(dev);
1798 struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
1799 unsigned long flags;
1800 int i;
1801
1802 raw_spin_lock_irqsave(&chv_lock, flags);
1803
1804 /*
1805 * Mask all interrupts before restoring per-pin configuration
1806 * registers because we don't know in which state BIOS left them
1807 * upon exiting suspend.
1808 */
1809 chv_writel(0, pctrl->regs + CHV_INTMASK);
1810
1811 for (i = 0; i < pctrl->community->npins; i++) {
1812 const struct pinctrl_pin_desc *desc;
1813 const struct chv_pin_context *ctx;
1814 void __iomem *reg;
1815 u32 val;
1816
1817 desc = &pctrl->community->pins[i];
1818 if (chv_pad_locked(pctrl, desc->number))
1819 continue;
1820
1821 ctx = &pctrl->saved_pin_context[i];
1822
1823 /* Only restore if our saved state differs from the current */
1824 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0);
1825 val = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE;
1826 if (ctx->padctrl0 != val) {
1827 chv_writel(ctx->padctrl0, reg);
1828 dev_dbg(pctrl->dev, "restored pin %2u ctrl0 0x%08x\n",
1829 desc->number, readl(reg));
1830 }
1831
1832 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1);
1833 val = readl(reg);
1834 if (ctx->padctrl1 != val) {
1835 chv_writel(ctx->padctrl1, reg);
1836 dev_dbg(pctrl->dev, "restored pin %2u ctrl1 0x%08x\n",
1837 desc->number, readl(reg));
1838 }
1839 }
1840
1841 /*
1842 * Now that all pins are restored to known state, we can restore
1843 * the interrupt mask register as well.
1844 */
1845 chv_writel(0xffff, pctrl->regs + CHV_INTSTAT);
1846 chv_writel(pctrl->saved_intmask, pctrl->regs + CHV_INTMASK);
1847
1848 raw_spin_unlock_irqrestore(&chv_lock, flags);
1849
1850 return 0;
1851 }
1852 #endif
1853
1854 static const struct dev_pm_ops chv_pinctrl_pm_ops = {
1855 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(chv_pinctrl_suspend_noirq,
1856 chv_pinctrl_resume_noirq)
1857 };
1858
1859 static const struct acpi_device_id chv_pinctrl_acpi_match[] = {
1860 { "INT33FF" },
1861 { }
1862 };
1863 MODULE_DEVICE_TABLE(acpi, chv_pinctrl_acpi_match);
1864
1865 static struct platform_driver chv_pinctrl_driver = {
1866 .probe = chv_pinctrl_probe,
1867 .remove = chv_pinctrl_remove,
1868 .driver = {
1869 .name = "cherryview-pinctrl",
1870 .pm = &chv_pinctrl_pm_ops,
1871 .acpi_match_table = chv_pinctrl_acpi_match,
1872 },
1873 };
1874
1875 static int __init chv_pinctrl_init(void)
1876 {
1877 return platform_driver_register(&chv_pinctrl_driver);
1878 }
1879 subsys_initcall(chv_pinctrl_init);
1880
1881 static void __exit chv_pinctrl_exit(void)
1882 {
1883 platform_driver_unregister(&chv_pinctrl_driver);
1884 }
1885 module_exit(chv_pinctrl_exit);
1886
1887 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
1888 MODULE_DESCRIPTION("Intel Cherryview/Braswell pinctrl driver");
1889 MODULE_LICENSE("GPL v2");
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