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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Cherryview/Braswell pinctrl driver
4 *
5 * Copyright (C) 2014, 2020 Intel Corporation
6 * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
7 *
8 * This driver is based on the original Cherryview GPIO driver by
9 * Ning Li <ning.li@intel.com>
10 * Alan Cox <alan@linux.intel.com>
11 */
12
13#include <linux/acpi.h>
14#include <linux/dmi.h>
15#include <linux/gpio/driver.h>
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/platform_device.h>
19#include <linux/types.h>
20
21#include <linux/pinctrl/pinctrl.h>
22#include <linux/pinctrl/pinmux.h>
23#include <linux/pinctrl/pinconf.h>
24#include <linux/pinctrl/pinconf-generic.h>
25
26#include "pinctrl-intel.h"
27
28#define CHV_INTSTAT 0x300
29#define CHV_INTMASK 0x380
30
31#define FAMILY_PAD_REGS_OFF 0x4400
32#define FAMILY_PAD_REGS_SIZE 0x400
33#define MAX_FAMILY_PAD_GPIO_NO 15
34#define GPIO_REGS_SIZE 8
35
36#define CHV_PADCTRL0 0x000
37#define CHV_PADCTRL0_INTSEL_SHIFT 28
38#define CHV_PADCTRL0_INTSEL_MASK GENMASK(31, 28)
39#define CHV_PADCTRL0_TERM_UP BIT(23)
40#define CHV_PADCTRL0_TERM_SHIFT 20
41#define CHV_PADCTRL0_TERM_MASK GENMASK(22, 20)
42#define CHV_PADCTRL0_TERM_20K 1
43#define CHV_PADCTRL0_TERM_5K 2
44#define CHV_PADCTRL0_TERM_1K 4
45#define CHV_PADCTRL0_PMODE_SHIFT 16
46#define CHV_PADCTRL0_PMODE_MASK GENMASK(19, 16)
47#define CHV_PADCTRL0_GPIOEN BIT(15)
48#define CHV_PADCTRL0_GPIOCFG_SHIFT 8
49#define CHV_PADCTRL0_GPIOCFG_MASK GENMASK(10, 8)
50#define CHV_PADCTRL0_GPIOCFG_GPIO 0
51#define CHV_PADCTRL0_GPIOCFG_GPO 1
52#define CHV_PADCTRL0_GPIOCFG_GPI 2
53#define CHV_PADCTRL0_GPIOCFG_HIZ 3
54#define CHV_PADCTRL0_GPIOTXSTATE BIT(1)
55#define CHV_PADCTRL0_GPIORXSTATE BIT(0)
56
57#define CHV_PADCTRL1 0x004
58#define CHV_PADCTRL1_CFGLOCK BIT(31)
59#define CHV_PADCTRL1_INVRXTX_SHIFT 4
60#define CHV_PADCTRL1_INVRXTX_MASK GENMASK(7, 4)
61#define CHV_PADCTRL1_INVRXTX_TXDATA BIT(7)
62#define CHV_PADCTRL1_INVRXTX_RXDATA BIT(6)
63#define CHV_PADCTRL1_INVRXTX_TXENABLE BIT(5)
64#define CHV_PADCTRL1_ODEN BIT(3)
65#define CHV_PADCTRL1_INTWAKECFG_MASK GENMASK(2, 0)
66#define CHV_PADCTRL1_INTWAKECFG_FALLING 1
67#define CHV_PADCTRL1_INTWAKECFG_RISING 2
68#define CHV_PADCTRL1_INTWAKECFG_BOTH 3
69#define CHV_PADCTRL1_INTWAKECFG_LEVEL 4
70
71struct intel_pad_context {
72 u32 padctrl0;
73 u32 padctrl1;
74};
75
76/**
77 * struct intel_community_context - community context for Cherryview
78 * @intr_lines: Mapping between 16 HW interrupt wires and GPIO offset (in GPIO number space)
79 * @saved_intmask: Interrupt mask saved for system sleep
80 */
81struct intel_community_context {
82 unsigned int intr_lines[16];
83 u32 saved_intmask;
84};
85
86#define PINMODE_INVERT_OE BIT(15)
87
88#define PINMODE(m, i) ((m) | ((i) * PINMODE_INVERT_OE))
89
90#define CHV_GPP(start, end) \
91 { \
92 .base = (start), \
93 .size = (end) - (start) + 1, \
94 }
95
96#define CHV_COMMUNITY(g, i, a) \
97 { \
98 .gpps = (g), \
99 .ngpps = ARRAY_SIZE(g), \
100 .nirqs = (i), \
101 .acpi_space_id = (a), \
102 }
103
104static const struct pinctrl_pin_desc southwest_pins[] = {
105 PINCTRL_PIN(0, "FST_SPI_D2"),
106 PINCTRL_PIN(1, "FST_SPI_D0"),
107 PINCTRL_PIN(2, "FST_SPI_CLK"),
108 PINCTRL_PIN(3, "FST_SPI_D3"),
109 PINCTRL_PIN(4, "FST_SPI_CS1_B"),
110 PINCTRL_PIN(5, "FST_SPI_D1"),
111 PINCTRL_PIN(6, "FST_SPI_CS0_B"),
112 PINCTRL_PIN(7, "FST_SPI_CS2_B"),
113
114 PINCTRL_PIN(15, "UART1_RTS_B"),
115 PINCTRL_PIN(16, "UART1_RXD"),
116 PINCTRL_PIN(17, "UART2_RXD"),
117 PINCTRL_PIN(18, "UART1_CTS_B"),
118 PINCTRL_PIN(19, "UART2_RTS_B"),
119 PINCTRL_PIN(20, "UART1_TXD"),
120 PINCTRL_PIN(21, "UART2_TXD"),
121 PINCTRL_PIN(22, "UART2_CTS_B"),
122
123 PINCTRL_PIN(30, "MF_HDA_CLK"),
124 PINCTRL_PIN(31, "MF_HDA_RSTB"),
125 PINCTRL_PIN(32, "MF_HDA_SDIO"),
126 PINCTRL_PIN(33, "MF_HDA_SDO"),
127 PINCTRL_PIN(34, "MF_HDA_DOCKRSTB"),
128 PINCTRL_PIN(35, "MF_HDA_SYNC"),
129 PINCTRL_PIN(36, "MF_HDA_SDI1"),
130 PINCTRL_PIN(37, "MF_HDA_DOCKENB"),
131
132 PINCTRL_PIN(45, "I2C5_SDA"),
133 PINCTRL_PIN(46, "I2C4_SDA"),
134 PINCTRL_PIN(47, "I2C6_SDA"),
135 PINCTRL_PIN(48, "I2C5_SCL"),
136 PINCTRL_PIN(49, "I2C_NFC_SDA"),
137 PINCTRL_PIN(50, "I2C4_SCL"),
138 PINCTRL_PIN(51, "I2C6_SCL"),
139 PINCTRL_PIN(52, "I2C_NFC_SCL"),
140
141 PINCTRL_PIN(60, "I2C1_SDA"),
142 PINCTRL_PIN(61, "I2C0_SDA"),
143 PINCTRL_PIN(62, "I2C2_SDA"),
144 PINCTRL_PIN(63, "I2C1_SCL"),
145 PINCTRL_PIN(64, "I2C3_SDA"),
146 PINCTRL_PIN(65, "I2C0_SCL"),
147 PINCTRL_PIN(66, "I2C2_SCL"),
148 PINCTRL_PIN(67, "I2C3_SCL"),
149
150 PINCTRL_PIN(75, "SATA_GP0"),
151 PINCTRL_PIN(76, "SATA_GP1"),
152 PINCTRL_PIN(77, "SATA_LEDN"),
153 PINCTRL_PIN(78, "SATA_GP2"),
154 PINCTRL_PIN(79, "MF_SMB_ALERTB"),
155 PINCTRL_PIN(80, "SATA_GP3"),
156 PINCTRL_PIN(81, "MF_SMB_CLK"),
157 PINCTRL_PIN(82, "MF_SMB_DATA"),
158
159 PINCTRL_PIN(90, "PCIE_CLKREQ0B"),
160 PINCTRL_PIN(91, "PCIE_CLKREQ1B"),
161 PINCTRL_PIN(92, "GP_SSP_2_CLK"),
162 PINCTRL_PIN(93, "PCIE_CLKREQ2B"),
163 PINCTRL_PIN(94, "GP_SSP_2_RXD"),
164 PINCTRL_PIN(95, "PCIE_CLKREQ3B"),
165 PINCTRL_PIN(96, "GP_SSP_2_FS"),
166 PINCTRL_PIN(97, "GP_SSP_2_TXD"),
167};
168
169static const unsigned southwest_uart0_pins[] = { 16, 20 };
170static const unsigned southwest_uart1_pins[] = { 15, 16, 18, 20 };
171static const unsigned southwest_uart2_pins[] = { 17, 19, 21, 22 };
172static const unsigned southwest_i2c0_pins[] = { 61, 65 };
173static const unsigned southwest_hda_pins[] = { 30, 31, 32, 33, 34, 35, 36, 37 };
174static const unsigned southwest_lpe_pins[] = {
175 30, 31, 32, 33, 34, 35, 36, 37, 92, 94, 96, 97,
176};
177static const unsigned southwest_i2c1_pins[] = { 60, 63 };
178static const unsigned southwest_i2c2_pins[] = { 62, 66 };
179static const unsigned southwest_i2c3_pins[] = { 64, 67 };
180static const unsigned southwest_i2c4_pins[] = { 46, 50 };
181static const unsigned southwest_i2c5_pins[] = { 45, 48 };
182static const unsigned southwest_i2c6_pins[] = { 47, 51 };
183static const unsigned southwest_i2c_nfc_pins[] = { 49, 52 };
184static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 };
185
186/* Some of LPE I2S TXD pins need to have OE inversion set */
187static const unsigned int southwest_lpe_altfuncs[] = {
188 PINMODE(1, 1), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), /* 30, 31, 32, 33 */
189 PINMODE(1, 1), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), /* 34, 35, 36, 37 */
190 PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 1), /* 92, 94, 96, 97 */
191};
192
193/*
194 * Two spi3 chipselects are available in different mode than the main spi3
195 * functionality, which is using mode 2.
196 */
197static const unsigned int southwest_spi3_altfuncs[] = {
198 PINMODE(3, 0), PINMODE(2, 0), PINMODE(3, 0), PINMODE(2, 0), /* 76, 79, 80, 81 */
199 PINMODE(2, 0), /* 82 */
200};
201
202static const struct intel_pingroup southwest_groups[] = {
203 PIN_GROUP("uart0_grp", southwest_uart0_pins, PINMODE(2, 0)),
204 PIN_GROUP("uart1_grp", southwest_uart1_pins, PINMODE(1, 0)),
205 PIN_GROUP("uart2_grp", southwest_uart2_pins, PINMODE(1, 0)),
206 PIN_GROUP("hda_grp", southwest_hda_pins, PINMODE(2, 0)),
207 PIN_GROUP("i2c0_grp", southwest_i2c0_pins, PINMODE(1, 1)),
208 PIN_GROUP("i2c1_grp", southwest_i2c1_pins, PINMODE(1, 1)),
209 PIN_GROUP("i2c2_grp", southwest_i2c2_pins, PINMODE(1, 1)),
210 PIN_GROUP("i2c3_grp", southwest_i2c3_pins, PINMODE(1, 1)),
211 PIN_GROUP("i2c4_grp", southwest_i2c4_pins, PINMODE(1, 1)),
212 PIN_GROUP("i2c5_grp", southwest_i2c5_pins, PINMODE(1, 1)),
213 PIN_GROUP("i2c6_grp", southwest_i2c6_pins, PINMODE(1, 1)),
214 PIN_GROUP("i2c_nfc_grp", southwest_i2c_nfc_pins, PINMODE(2, 1)),
215 PIN_GROUP("lpe_grp", southwest_lpe_pins, southwest_lpe_altfuncs),
216 PIN_GROUP("spi3_grp", southwest_spi3_pins, southwest_spi3_altfuncs),
217};
218
219static const char * const southwest_uart0_groups[] = { "uart0_grp" };
220static const char * const southwest_uart1_groups[] = { "uart1_grp" };
221static const char * const southwest_uart2_groups[] = { "uart2_grp" };
222static const char * const southwest_hda_groups[] = { "hda_grp" };
223static const char * const southwest_lpe_groups[] = { "lpe_grp" };
224static const char * const southwest_i2c0_groups[] = { "i2c0_grp" };
225static const char * const southwest_i2c1_groups[] = { "i2c1_grp" };
226static const char * const southwest_i2c2_groups[] = { "i2c2_grp" };
227static const char * const southwest_i2c3_groups[] = { "i2c3_grp" };
228static const char * const southwest_i2c4_groups[] = { "i2c4_grp" };
229static const char * const southwest_i2c5_groups[] = { "i2c5_grp" };
230static const char * const southwest_i2c6_groups[] = { "i2c6_grp" };
231static const char * const southwest_i2c_nfc_groups[] = { "i2c_nfc_grp" };
232static const char * const southwest_spi3_groups[] = { "spi3_grp" };
233
234/*
235 * Only do pinmuxing for certain LPSS devices for now. Rest of the pins are
236 * enabled only as GPIOs.
237 */
238static const struct intel_function southwest_functions[] = {
239 FUNCTION("uart0", southwest_uart0_groups),
240 FUNCTION("uart1", southwest_uart1_groups),
241 FUNCTION("uart2", southwest_uart2_groups),
242 FUNCTION("hda", southwest_hda_groups),
243 FUNCTION("lpe", southwest_lpe_groups),
244 FUNCTION("i2c0", southwest_i2c0_groups),
245 FUNCTION("i2c1", southwest_i2c1_groups),
246 FUNCTION("i2c2", southwest_i2c2_groups),
247 FUNCTION("i2c3", southwest_i2c3_groups),
248 FUNCTION("i2c4", southwest_i2c4_groups),
249 FUNCTION("i2c5", southwest_i2c5_groups),
250 FUNCTION("i2c6", southwest_i2c6_groups),
251 FUNCTION("i2c_nfc", southwest_i2c_nfc_groups),
252 FUNCTION("spi3", southwest_spi3_groups),
253};
254
255static const struct intel_padgroup southwest_gpps[] = {
256 CHV_GPP(0, 7),
257 CHV_GPP(15, 22),
258 CHV_GPP(30, 37),
259 CHV_GPP(45, 52),
260 CHV_GPP(60, 67),
261 CHV_GPP(75, 82),
262 CHV_GPP(90, 97),
263};
264
265/*
266 * Southwest community can generate GPIO interrupts only for the first 8
267 * interrupts. The upper half (8-15) can only be used to trigger GPEs.
268 */
269static const struct intel_community southwest_communities[] = {
270 CHV_COMMUNITY(southwest_gpps, 8, 0x91),
271};
272
273static const struct intel_pinctrl_soc_data southwest_soc_data = {
274 .uid = "1",
275 .pins = southwest_pins,
276 .npins = ARRAY_SIZE(southwest_pins),
277 .groups = southwest_groups,
278 .ngroups = ARRAY_SIZE(southwest_groups),
279 .functions = southwest_functions,
280 .nfunctions = ARRAY_SIZE(southwest_functions),
281 .communities = southwest_communities,
282 .ncommunities = ARRAY_SIZE(southwest_communities),
283};
284
285static const struct pinctrl_pin_desc north_pins[] = {
286 PINCTRL_PIN(0, "GPIO_DFX_0"),
287 PINCTRL_PIN(1, "GPIO_DFX_3"),
288 PINCTRL_PIN(2, "GPIO_DFX_7"),
289 PINCTRL_PIN(3, "GPIO_DFX_1"),
290 PINCTRL_PIN(4, "GPIO_DFX_5"),
291 PINCTRL_PIN(5, "GPIO_DFX_4"),
292 PINCTRL_PIN(6, "GPIO_DFX_8"),
293 PINCTRL_PIN(7, "GPIO_DFX_2"),
294 PINCTRL_PIN(8, "GPIO_DFX_6"),
295
296 PINCTRL_PIN(15, "GPIO_SUS0"),
297 PINCTRL_PIN(16, "SEC_GPIO_SUS10"),
298 PINCTRL_PIN(17, "GPIO_SUS3"),
299 PINCTRL_PIN(18, "GPIO_SUS7"),
300 PINCTRL_PIN(19, "GPIO_SUS1"),
301 PINCTRL_PIN(20, "GPIO_SUS5"),
302 PINCTRL_PIN(21, "SEC_GPIO_SUS11"),
303 PINCTRL_PIN(22, "GPIO_SUS4"),
304 PINCTRL_PIN(23, "SEC_GPIO_SUS8"),
305 PINCTRL_PIN(24, "GPIO_SUS2"),
306 PINCTRL_PIN(25, "GPIO_SUS6"),
307 PINCTRL_PIN(26, "CX_PREQ_B"),
308 PINCTRL_PIN(27, "SEC_GPIO_SUS9"),
309
310 PINCTRL_PIN(30, "TRST_B"),
311 PINCTRL_PIN(31, "TCK"),
312 PINCTRL_PIN(32, "PROCHOT_B"),
313 PINCTRL_PIN(33, "SVIDO_DATA"),
314 PINCTRL_PIN(34, "TMS"),
315 PINCTRL_PIN(35, "CX_PRDY_B_2"),
316 PINCTRL_PIN(36, "TDO_2"),
317 PINCTRL_PIN(37, "CX_PRDY_B"),
318 PINCTRL_PIN(38, "SVIDO_ALERT_B"),
319 PINCTRL_PIN(39, "TDO"),
320 PINCTRL_PIN(40, "SVIDO_CLK"),
321 PINCTRL_PIN(41, "TDI"),
322
323 PINCTRL_PIN(45, "GP_CAMERASB_05"),
324 PINCTRL_PIN(46, "GP_CAMERASB_02"),
325 PINCTRL_PIN(47, "GP_CAMERASB_08"),
326 PINCTRL_PIN(48, "GP_CAMERASB_00"),
327 PINCTRL_PIN(49, "GP_CAMERASB_06"),
328 PINCTRL_PIN(50, "GP_CAMERASB_10"),
329 PINCTRL_PIN(51, "GP_CAMERASB_03"),
330 PINCTRL_PIN(52, "GP_CAMERASB_09"),
331 PINCTRL_PIN(53, "GP_CAMERASB_01"),
332 PINCTRL_PIN(54, "GP_CAMERASB_07"),
333 PINCTRL_PIN(55, "GP_CAMERASB_11"),
334 PINCTRL_PIN(56, "GP_CAMERASB_04"),
335
336 PINCTRL_PIN(60, "PANEL0_BKLTEN"),
337 PINCTRL_PIN(61, "HV_DDI0_HPD"),
338 PINCTRL_PIN(62, "HV_DDI2_DDC_SDA"),
339 PINCTRL_PIN(63, "PANEL1_BKLTCTL"),
340 PINCTRL_PIN(64, "HV_DDI1_HPD"),
341 PINCTRL_PIN(65, "PANEL0_BKLTCTL"),
342 PINCTRL_PIN(66, "HV_DDI0_DDC_SDA"),
343 PINCTRL_PIN(67, "HV_DDI2_DDC_SCL"),
344 PINCTRL_PIN(68, "HV_DDI2_HPD"),
345 PINCTRL_PIN(69, "PANEL1_VDDEN"),
346 PINCTRL_PIN(70, "PANEL1_BKLTEN"),
347 PINCTRL_PIN(71, "HV_DDI0_DDC_SCL"),
348 PINCTRL_PIN(72, "PANEL0_VDDEN"),
349};
350
351static const struct intel_padgroup north_gpps[] = {
352 CHV_GPP(0, 8),
353 CHV_GPP(15, 27),
354 CHV_GPP(30, 41),
355 CHV_GPP(45, 56),
356 CHV_GPP(60, 72),
357};
358
359/*
360 * North community can generate GPIO interrupts only for the first 8
361 * interrupts. The upper half (8-15) can only be used to trigger GPEs.
362 */
363static const struct intel_community north_communities[] = {
364 CHV_COMMUNITY(north_gpps, 8, 0x92),
365};
366
367static const struct intel_pinctrl_soc_data north_soc_data = {
368 .uid = "2",
369 .pins = north_pins,
370 .npins = ARRAY_SIZE(north_pins),
371 .communities = north_communities,
372 .ncommunities = ARRAY_SIZE(north_communities),
373};
374
375static const struct pinctrl_pin_desc east_pins[] = {
376 PINCTRL_PIN(0, "PMU_SLP_S3_B"),
377 PINCTRL_PIN(1, "PMU_BATLOW_B"),
378 PINCTRL_PIN(2, "SUS_STAT_B"),
379 PINCTRL_PIN(3, "PMU_SLP_S0IX_B"),
380 PINCTRL_PIN(4, "PMU_AC_PRESENT"),
381 PINCTRL_PIN(5, "PMU_PLTRST_B"),
382 PINCTRL_PIN(6, "PMU_SUSCLK"),
383 PINCTRL_PIN(7, "PMU_SLP_LAN_B"),
384 PINCTRL_PIN(8, "PMU_PWRBTN_B"),
385 PINCTRL_PIN(9, "PMU_SLP_S4_B"),
386 PINCTRL_PIN(10, "PMU_WAKE_B"),
387 PINCTRL_PIN(11, "PMU_WAKE_LAN_B"),
388
389 PINCTRL_PIN(15, "MF_ISH_GPIO_3"),
390 PINCTRL_PIN(16, "MF_ISH_GPIO_7"),
391 PINCTRL_PIN(17, "MF_ISH_I2C1_SCL"),
392 PINCTRL_PIN(18, "MF_ISH_GPIO_1"),
393 PINCTRL_PIN(19, "MF_ISH_GPIO_5"),
394 PINCTRL_PIN(20, "MF_ISH_GPIO_9"),
395 PINCTRL_PIN(21, "MF_ISH_GPIO_0"),
396 PINCTRL_PIN(22, "MF_ISH_GPIO_4"),
397 PINCTRL_PIN(23, "MF_ISH_GPIO_8"),
398 PINCTRL_PIN(24, "MF_ISH_GPIO_2"),
399 PINCTRL_PIN(25, "MF_ISH_GPIO_6"),
400 PINCTRL_PIN(26, "MF_ISH_I2C1_SDA"),
401};
402
403static const struct intel_padgroup east_gpps[] = {
404 CHV_GPP(0, 11),
405 CHV_GPP(15, 26),
406};
407
408static const struct intel_community east_communities[] = {
409 CHV_COMMUNITY(east_gpps, 16, 0x93),
410};
411
412static const struct intel_pinctrl_soc_data east_soc_data = {
413 .uid = "3",
414 .pins = east_pins,
415 .npins = ARRAY_SIZE(east_pins),
416 .communities = east_communities,
417 .ncommunities = ARRAY_SIZE(east_communities),
418};
419
420static const struct pinctrl_pin_desc southeast_pins[] = {
421 PINCTRL_PIN(0, "MF_PLT_CLK0"),
422 PINCTRL_PIN(1, "PWM1"),
423 PINCTRL_PIN(2, "MF_PLT_CLK1"),
424 PINCTRL_PIN(3, "MF_PLT_CLK4"),
425 PINCTRL_PIN(4, "MF_PLT_CLK3"),
426 PINCTRL_PIN(5, "PWM0"),
427 PINCTRL_PIN(6, "MF_PLT_CLK5"),
428 PINCTRL_PIN(7, "MF_PLT_CLK2"),
429
430 PINCTRL_PIN(15, "SDMMC2_D3_CD_B"),
431 PINCTRL_PIN(16, "SDMMC1_CLK"),
432 PINCTRL_PIN(17, "SDMMC1_D0"),
433 PINCTRL_PIN(18, "SDMMC2_D1"),
434 PINCTRL_PIN(19, "SDMMC2_CLK"),
435 PINCTRL_PIN(20, "SDMMC1_D2"),
436 PINCTRL_PIN(21, "SDMMC2_D2"),
437 PINCTRL_PIN(22, "SDMMC2_CMD"),
438 PINCTRL_PIN(23, "SDMMC1_CMD"),
439 PINCTRL_PIN(24, "SDMMC1_D1"),
440 PINCTRL_PIN(25, "SDMMC2_D0"),
441 PINCTRL_PIN(26, "SDMMC1_D3_CD_B"),
442
443 PINCTRL_PIN(30, "SDMMC3_D1"),
444 PINCTRL_PIN(31, "SDMMC3_CLK"),
445 PINCTRL_PIN(32, "SDMMC3_D3"),
446 PINCTRL_PIN(33, "SDMMC3_D2"),
447 PINCTRL_PIN(34, "SDMMC3_CMD"),
448 PINCTRL_PIN(35, "SDMMC3_D0"),
449
450 PINCTRL_PIN(45, "MF_LPC_AD2"),
451 PINCTRL_PIN(46, "LPC_CLKRUNB"),
452 PINCTRL_PIN(47, "MF_LPC_AD0"),
453 PINCTRL_PIN(48, "LPC_FRAMEB"),
454 PINCTRL_PIN(49, "MF_LPC_CLKOUT1"),
455 PINCTRL_PIN(50, "MF_LPC_AD3"),
456 PINCTRL_PIN(51, "MF_LPC_CLKOUT0"),
457 PINCTRL_PIN(52, "MF_LPC_AD1"),
458
459 PINCTRL_PIN(60, "SPI1_MISO"),
460 PINCTRL_PIN(61, "SPI1_CSO_B"),
461 PINCTRL_PIN(62, "SPI1_CLK"),
462 PINCTRL_PIN(63, "MMC1_D6"),
463 PINCTRL_PIN(64, "SPI1_MOSI"),
464 PINCTRL_PIN(65, "MMC1_D5"),
465 PINCTRL_PIN(66, "SPI1_CS1_B"),
466 PINCTRL_PIN(67, "MMC1_D4_SD_WE"),
467 PINCTRL_PIN(68, "MMC1_D7"),
468 PINCTRL_PIN(69, "MMC1_RCLK"),
469
470 PINCTRL_PIN(75, "USB_OC1_B"),
471 PINCTRL_PIN(76, "PMU_RESETBUTTON_B"),
472 PINCTRL_PIN(77, "GPIO_ALERT"),
473 PINCTRL_PIN(78, "SDMMC3_PWR_EN_B"),
474 PINCTRL_PIN(79, "ILB_SERIRQ"),
475 PINCTRL_PIN(80, "USB_OC0_B"),
476 PINCTRL_PIN(81, "SDMMC3_CD_B"),
477 PINCTRL_PIN(82, "SPKR"),
478 PINCTRL_PIN(83, "SUSPWRDNACK"),
479 PINCTRL_PIN(84, "SPARE_PIN"),
480 PINCTRL_PIN(85, "SDMMC3_1P8_EN"),
481};
482
483static const unsigned southeast_pwm0_pins[] = { 5 };
484static const unsigned southeast_pwm1_pins[] = { 1 };
485static const unsigned southeast_sdmmc1_pins[] = {
486 16, 17, 20, 23, 24, 26, 63, 65, 67, 68, 69,
487};
488static const unsigned southeast_sdmmc2_pins[] = { 15, 18, 19, 21, 22, 25 };
489static const unsigned southeast_sdmmc3_pins[] = {
490 30, 31, 32, 33, 34, 35, 78, 81, 85,
491};
492static const unsigned southeast_spi1_pins[] = { 60, 61, 62, 64, 66 };
493static const unsigned southeast_spi2_pins[] = { 2, 3, 4, 6, 7 };
494
495static const struct intel_pingroup southeast_groups[] = {
496 PIN_GROUP("pwm0_grp", southeast_pwm0_pins, PINMODE(1, 0)),
497 PIN_GROUP("pwm1_grp", southeast_pwm1_pins, PINMODE(1, 0)),
498 PIN_GROUP("sdmmc1_grp", southeast_sdmmc1_pins, PINMODE(1, 0)),
499 PIN_GROUP("sdmmc2_grp", southeast_sdmmc2_pins, PINMODE(1, 0)),
500 PIN_GROUP("sdmmc3_grp", southeast_sdmmc3_pins, PINMODE(1, 0)),
501 PIN_GROUP("spi1_grp", southeast_spi1_pins, PINMODE(1, 0)),
502 PIN_GROUP("spi2_grp", southeast_spi2_pins, PINMODE(4, 0)),
503};
504
505static const char * const southeast_pwm0_groups[] = { "pwm0_grp" };
506static const char * const southeast_pwm1_groups[] = { "pwm1_grp" };
507static const char * const southeast_sdmmc1_groups[] = { "sdmmc1_grp" };
508static const char * const southeast_sdmmc2_groups[] = { "sdmmc2_grp" };
509static const char * const southeast_sdmmc3_groups[] = { "sdmmc3_grp" };
510static const char * const southeast_spi1_groups[] = { "spi1_grp" };
511static const char * const southeast_spi2_groups[] = { "spi2_grp" };
512
513static const struct intel_function southeast_functions[] = {
514 FUNCTION("pwm0", southeast_pwm0_groups),
515 FUNCTION("pwm1", southeast_pwm1_groups),
516 FUNCTION("sdmmc1", southeast_sdmmc1_groups),
517 FUNCTION("sdmmc2", southeast_sdmmc2_groups),
518 FUNCTION("sdmmc3", southeast_sdmmc3_groups),
519 FUNCTION("spi1", southeast_spi1_groups),
520 FUNCTION("spi2", southeast_spi2_groups),
521};
522
523static const struct intel_padgroup southeast_gpps[] = {
524 CHV_GPP(0, 7),
525 CHV_GPP(15, 26),
526 CHV_GPP(30, 35),
527 CHV_GPP(45, 52),
528 CHV_GPP(60, 69),
529 CHV_GPP(75, 85),
530};
531
532static const struct intel_community southeast_communities[] = {
533 CHV_COMMUNITY(southeast_gpps, 16, 0x94),
534};
535
536static const struct intel_pinctrl_soc_data southeast_soc_data = {
537 .uid = "4",
538 .pins = southeast_pins,
539 .npins = ARRAY_SIZE(southeast_pins),
540 .groups = southeast_groups,
541 .ngroups = ARRAY_SIZE(southeast_groups),
542 .functions = southeast_functions,
543 .nfunctions = ARRAY_SIZE(southeast_functions),
544 .communities = southeast_communities,
545 .ncommunities = ARRAY_SIZE(southeast_communities),
546};
547
548static const struct intel_pinctrl_soc_data *chv_soc_data[] = {
549 &southwest_soc_data,
550 &north_soc_data,
551 &east_soc_data,
552 &southeast_soc_data,
553 NULL
554};
555
556/*
557 * Lock to serialize register accesses
558 *
559 * Due to a silicon issue, a shared lock must be used to prevent
560 * concurrent accesses across the 4 GPIO controllers.
561 *
562 * See Intel Atom Z8000 Processor Series Specification Update (Rev. 005),
563 * errata #CHT34, for further information.
564 */
565static DEFINE_RAW_SPINLOCK(chv_lock);
566
567static u32 chv_pctrl_readl(struct intel_pinctrl *pctrl, unsigned int offset)
568{
569 const struct intel_community *community = &pctrl->communities[0];
570
571 return readl(community->regs + offset);
572}
573
574static void chv_pctrl_writel(struct intel_pinctrl *pctrl, unsigned int offset, u32 value)
575{
576 const struct intel_community *community = &pctrl->communities[0];
577 void __iomem *reg = community->regs + offset;
578
579 /* Write and simple read back to confirm the bus transferring done */
580 writel(value, reg);
581 readl(reg);
582}
583
584static void __iomem *chv_padreg(struct intel_pinctrl *pctrl, unsigned int offset,
585 unsigned int reg)
586{
587 const struct intel_community *community = &pctrl->communities[0];
588 unsigned int family_no = offset / MAX_FAMILY_PAD_GPIO_NO;
589 unsigned int pad_no = offset % MAX_FAMILY_PAD_GPIO_NO;
590
591 offset = FAMILY_PAD_REGS_SIZE * family_no + GPIO_REGS_SIZE * pad_no;
592
593 return community->pad_regs + offset + reg;
594}
595
596static u32 chv_readl(struct intel_pinctrl *pctrl, unsigned int pin, unsigned int offset)
597{
598 return readl(chv_padreg(pctrl, pin, offset));
599}
600
601static void chv_writel(struct intel_pinctrl *pctrl, unsigned int pin, unsigned int offset, u32 value)
602{
603 void __iomem *reg = chv_padreg(pctrl, pin, offset);
604
605 /* Write and simple read back to confirm the bus transferring done */
606 writel(value, reg);
607 readl(reg);
608}
609
610/* When Pad Cfg is locked, driver can only change GPIOTXState or GPIORXState */
611static bool chv_pad_locked(struct intel_pinctrl *pctrl, unsigned int offset)
612{
613 return chv_readl(pctrl, offset, CHV_PADCTRL1) & CHV_PADCTRL1_CFGLOCK;
614}
615
616static int chv_get_groups_count(struct pinctrl_dev *pctldev)
617{
618 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
619
620 return pctrl->soc->ngroups;
621}
622
623static const char *chv_get_group_name(struct pinctrl_dev *pctldev,
624 unsigned int group)
625{
626 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
627
628 return pctrl->soc->groups[group].name;
629}
630
631static int chv_get_group_pins(struct pinctrl_dev *pctldev, unsigned int group,
632 const unsigned int **pins, unsigned int *npins)
633{
634 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
635
636 *pins = pctrl->soc->groups[group].pins;
637 *npins = pctrl->soc->groups[group].npins;
638 return 0;
639}
640
641static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
642 unsigned int offset)
643{
644 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
645 unsigned long flags;
646 u32 ctrl0, ctrl1;
647 bool locked;
648
649 raw_spin_lock_irqsave(&chv_lock, flags);
650
651 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
652 ctrl1 = chv_readl(pctrl, offset, CHV_PADCTRL1);
653 locked = chv_pad_locked(pctrl, offset);
654
655 raw_spin_unlock_irqrestore(&chv_lock, flags);
656
657 if (ctrl0 & CHV_PADCTRL0_GPIOEN) {
658 seq_puts(s, "GPIO ");
659 } else {
660 u32 mode;
661
662 mode = ctrl0 & CHV_PADCTRL0_PMODE_MASK;
663 mode >>= CHV_PADCTRL0_PMODE_SHIFT;
664
665 seq_printf(s, "mode %d ", mode);
666 }
667
668 seq_printf(s, "0x%08x 0x%08x", ctrl0, ctrl1);
669
670 if (locked)
671 seq_puts(s, " [LOCKED]");
672}
673
674static const struct pinctrl_ops chv_pinctrl_ops = {
675 .get_groups_count = chv_get_groups_count,
676 .get_group_name = chv_get_group_name,
677 .get_group_pins = chv_get_group_pins,
678 .pin_dbg_show = chv_pin_dbg_show,
679};
680
681static int chv_get_functions_count(struct pinctrl_dev *pctldev)
682{
683 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
684
685 return pctrl->soc->nfunctions;
686}
687
688static const char *chv_get_function_name(struct pinctrl_dev *pctldev,
689 unsigned int function)
690{
691 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
692
693 return pctrl->soc->functions[function].name;
694}
695
696static int chv_get_function_groups(struct pinctrl_dev *pctldev,
697 unsigned int function,
698 const char * const **groups,
699 unsigned int * const ngroups)
700{
701 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
702
703 *groups = pctrl->soc->functions[function].groups;
704 *ngroups = pctrl->soc->functions[function].ngroups;
705 return 0;
706}
707
708static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev,
709 unsigned int function, unsigned int group)
710{
711 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
712 const struct intel_pingroup *grp;
713 unsigned long flags;
714 int i;
715
716 grp = &pctrl->soc->groups[group];
717
718 raw_spin_lock_irqsave(&chv_lock, flags);
719
720 /* Check first that the pad is not locked */
721 for (i = 0; i < grp->npins; i++) {
722 if (chv_pad_locked(pctrl, grp->pins[i])) {
723 dev_warn(pctrl->dev, "unable to set mode for locked pin %u\n",
724 grp->pins[i]);
725 raw_spin_unlock_irqrestore(&chv_lock, flags);
726 return -EBUSY;
727 }
728 }
729
730 for (i = 0; i < grp->npins; i++) {
731 int pin = grp->pins[i];
732 unsigned int mode;
733 bool invert_oe;
734 u32 value;
735
736 /* Check if there is pin-specific config */
737 if (grp->modes)
738 mode = grp->modes[i];
739 else
740 mode = grp->mode;
741
742 /* Extract OE inversion */
743 invert_oe = mode & PINMODE_INVERT_OE;
744 mode &= ~PINMODE_INVERT_OE;
745
746 value = chv_readl(pctrl, pin, CHV_PADCTRL0);
747 /* Disable GPIO mode */
748 value &= ~CHV_PADCTRL0_GPIOEN;
749 /* Set to desired mode */
750 value &= ~CHV_PADCTRL0_PMODE_MASK;
751 value |= mode << CHV_PADCTRL0_PMODE_SHIFT;
752 chv_writel(pctrl, pin, CHV_PADCTRL0, value);
753
754 /* Update for invert_oe */
755 value = chv_readl(pctrl, pin, CHV_PADCTRL1) & ~CHV_PADCTRL1_INVRXTX_MASK;
756 if (invert_oe)
757 value |= CHV_PADCTRL1_INVRXTX_TXENABLE;
758 chv_writel(pctrl, pin, CHV_PADCTRL1, value);
759
760 dev_dbg(pctrl->dev, "configured pin %u mode %u OE %sinverted\n",
761 pin, mode, invert_oe ? "" : "not ");
762 }
763
764 raw_spin_unlock_irqrestore(&chv_lock, flags);
765
766 return 0;
767}
768
769static void chv_gpio_clear_triggering(struct intel_pinctrl *pctrl,
770 unsigned int offset)
771{
772 u32 invrxtx_mask = CHV_PADCTRL1_INVRXTX_MASK;
773 u32 value;
774
775 /*
776 * One some devices the GPIO should output the inverted value from what
777 * device-drivers / ACPI code expects (inverted external buffer?). The
778 * BIOS makes this work by setting the CHV_PADCTRL1_INVRXTX_TXDATA flag,
779 * preserve this flag if the pin is already setup as GPIO.
780 */
781 value = chv_readl(pctrl, offset, CHV_PADCTRL0);
782 if (value & CHV_PADCTRL0_GPIOEN)
783 invrxtx_mask &= ~CHV_PADCTRL1_INVRXTX_TXDATA;
784
785 value = chv_readl(pctrl, offset, CHV_PADCTRL1);
786 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
787 value &= ~invrxtx_mask;
788 chv_writel(pctrl, offset, CHV_PADCTRL1, value);
789}
790
791static int chv_gpio_request_enable(struct pinctrl_dev *pctldev,
792 struct pinctrl_gpio_range *range,
793 unsigned int offset)
794{
795 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
796 unsigned long flags;
797 u32 value;
798
799 raw_spin_lock_irqsave(&chv_lock, flags);
800
801 if (chv_pad_locked(pctrl, offset)) {
802 value = chv_readl(pctrl, offset, CHV_PADCTRL0);
803 if (!(value & CHV_PADCTRL0_GPIOEN)) {
804 /* Locked so cannot enable */
805 raw_spin_unlock_irqrestore(&chv_lock, flags);
806 return -EBUSY;
807 }
808 } else {
809 struct intel_community_context *cctx = &pctrl->context.communities[0];
810 int i;
811
812 /* Reset the interrupt mapping */
813 for (i = 0; i < ARRAY_SIZE(cctx->intr_lines); i++) {
814 if (cctx->intr_lines[i] == offset) {
815 cctx->intr_lines[i] = 0;
816 break;
817 }
818 }
819
820 /* Disable interrupt generation */
821 chv_gpio_clear_triggering(pctrl, offset);
822
823 value = chv_readl(pctrl, offset, CHV_PADCTRL0);
824
825 /*
826 * If the pin is in HiZ mode (both TX and RX buffers are
827 * disabled) we turn it to be input now.
828 */
829 if ((value & CHV_PADCTRL0_GPIOCFG_MASK) ==
830 (CHV_PADCTRL0_GPIOCFG_HIZ << CHV_PADCTRL0_GPIOCFG_SHIFT)) {
831 value &= ~CHV_PADCTRL0_GPIOCFG_MASK;
832 value |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT;
833 }
834
835 /* Switch to a GPIO mode */
836 value |= CHV_PADCTRL0_GPIOEN;
837 chv_writel(pctrl, offset, CHV_PADCTRL0, value);
838 }
839
840 raw_spin_unlock_irqrestore(&chv_lock, flags);
841
842 return 0;
843}
844
845static void chv_gpio_disable_free(struct pinctrl_dev *pctldev,
846 struct pinctrl_gpio_range *range,
847 unsigned int offset)
848{
849 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
850 unsigned long flags;
851
852 raw_spin_lock_irqsave(&chv_lock, flags);
853
854 if (!chv_pad_locked(pctrl, offset))
855 chv_gpio_clear_triggering(pctrl, offset);
856
857 raw_spin_unlock_irqrestore(&chv_lock, flags);
858}
859
860static int chv_gpio_set_direction(struct pinctrl_dev *pctldev,
861 struct pinctrl_gpio_range *range,
862 unsigned int offset, bool input)
863{
864 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
865 unsigned long flags;
866 u32 ctrl0;
867
868 raw_spin_lock_irqsave(&chv_lock, flags);
869
870 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0) & ~CHV_PADCTRL0_GPIOCFG_MASK;
871 if (input)
872 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT;
873 else
874 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPO << CHV_PADCTRL0_GPIOCFG_SHIFT;
875 chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0);
876
877 raw_spin_unlock_irqrestore(&chv_lock, flags);
878
879 return 0;
880}
881
882static const struct pinmux_ops chv_pinmux_ops = {
883 .get_functions_count = chv_get_functions_count,
884 .get_function_name = chv_get_function_name,
885 .get_function_groups = chv_get_function_groups,
886 .set_mux = chv_pinmux_set_mux,
887 .gpio_request_enable = chv_gpio_request_enable,
888 .gpio_disable_free = chv_gpio_disable_free,
889 .gpio_set_direction = chv_gpio_set_direction,
890};
891
892static int chv_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
893 unsigned long *config)
894{
895 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
896 enum pin_config_param param = pinconf_to_config_param(*config);
897 unsigned long flags;
898 u32 ctrl0, ctrl1;
899 u16 arg = 0;
900 u32 term;
901
902 raw_spin_lock_irqsave(&chv_lock, flags);
903 ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0);
904 ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1);
905 raw_spin_unlock_irqrestore(&chv_lock, flags);
906
907 term = (ctrl0 & CHV_PADCTRL0_TERM_MASK) >> CHV_PADCTRL0_TERM_SHIFT;
908
909 switch (param) {
910 case PIN_CONFIG_BIAS_DISABLE:
911 if (term)
912 return -EINVAL;
913 break;
914
915 case PIN_CONFIG_BIAS_PULL_UP:
916 if (!(ctrl0 & CHV_PADCTRL0_TERM_UP))
917 return -EINVAL;
918
919 switch (term) {
920 case CHV_PADCTRL0_TERM_20K:
921 arg = 20000;
922 break;
923 case CHV_PADCTRL0_TERM_5K:
924 arg = 5000;
925 break;
926 case CHV_PADCTRL0_TERM_1K:
927 arg = 1000;
928 break;
929 }
930
931 break;
932
933 case PIN_CONFIG_BIAS_PULL_DOWN:
934 if (!term || (ctrl0 & CHV_PADCTRL0_TERM_UP))
935 return -EINVAL;
936
937 switch (term) {
938 case CHV_PADCTRL0_TERM_20K:
939 arg = 20000;
940 break;
941 case CHV_PADCTRL0_TERM_5K:
942 arg = 5000;
943 break;
944 }
945
946 break;
947
948 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
949 if (!(ctrl1 & CHV_PADCTRL1_ODEN))
950 return -EINVAL;
951 break;
952
953 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: {
954 u32 cfg;
955
956 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
957 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
958 if (cfg != CHV_PADCTRL0_GPIOCFG_HIZ)
959 return -EINVAL;
960
961 break;
962 }
963
964 default:
965 return -ENOTSUPP;
966 }
967
968 *config = pinconf_to_config_packed(param, arg);
969 return 0;
970}
971
972static int chv_config_set_pull(struct intel_pinctrl *pctrl, unsigned int pin,
973 enum pin_config_param param, u32 arg)
974{
975 unsigned long flags;
976 u32 ctrl0, pull;
977
978 raw_spin_lock_irqsave(&chv_lock, flags);
979 ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0);
980
981 switch (param) {
982 case PIN_CONFIG_BIAS_DISABLE:
983 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
984 break;
985
986 case PIN_CONFIG_BIAS_PULL_UP:
987 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
988
989 switch (arg) {
990 case 1000:
991 /* For 1k there is only pull up */
992 pull = CHV_PADCTRL0_TERM_1K << CHV_PADCTRL0_TERM_SHIFT;
993 break;
994 case 5000:
995 pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
996 break;
997 case 20000:
998 pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
999 break;
1000 default:
1001 raw_spin_unlock_irqrestore(&chv_lock, flags);
1002 return -EINVAL;
1003 }
1004
1005 ctrl0 |= CHV_PADCTRL0_TERM_UP | pull;
1006 break;
1007
1008 case PIN_CONFIG_BIAS_PULL_DOWN:
1009 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1010
1011 switch (arg) {
1012 case 5000:
1013 pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
1014 break;
1015 case 20000:
1016 pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
1017 break;
1018 default:
1019 raw_spin_unlock_irqrestore(&chv_lock, flags);
1020 return -EINVAL;
1021 }
1022
1023 ctrl0 |= pull;
1024 break;
1025
1026 default:
1027 raw_spin_unlock_irqrestore(&chv_lock, flags);
1028 return -EINVAL;
1029 }
1030
1031 chv_writel(pctrl, pin, CHV_PADCTRL0, ctrl0);
1032 raw_spin_unlock_irqrestore(&chv_lock, flags);
1033
1034 return 0;
1035}
1036
1037static int chv_config_set_oden(struct intel_pinctrl *pctrl, unsigned int pin,
1038 bool enable)
1039{
1040 unsigned long flags;
1041 u32 ctrl1;
1042
1043 raw_spin_lock_irqsave(&chv_lock, flags);
1044 ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1);
1045
1046 if (enable)
1047 ctrl1 |= CHV_PADCTRL1_ODEN;
1048 else
1049 ctrl1 &= ~CHV_PADCTRL1_ODEN;
1050
1051 chv_writel(pctrl, pin, CHV_PADCTRL1, ctrl1);
1052 raw_spin_unlock_irqrestore(&chv_lock, flags);
1053
1054 return 0;
1055}
1056
1057static int chv_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
1058 unsigned long *configs, unsigned int nconfigs)
1059{
1060 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
1061 enum pin_config_param param;
1062 int i, ret;
1063 u32 arg;
1064
1065 if (chv_pad_locked(pctrl, pin))
1066 return -EBUSY;
1067
1068 for (i = 0; i < nconfigs; i++) {
1069 param = pinconf_to_config_param(configs[i]);
1070 arg = pinconf_to_config_argument(configs[i]);
1071
1072 switch (param) {
1073 case PIN_CONFIG_BIAS_DISABLE:
1074 case PIN_CONFIG_BIAS_PULL_UP:
1075 case PIN_CONFIG_BIAS_PULL_DOWN:
1076 ret = chv_config_set_pull(pctrl, pin, param, arg);
1077 if (ret)
1078 return ret;
1079 break;
1080
1081 case PIN_CONFIG_DRIVE_PUSH_PULL:
1082 ret = chv_config_set_oden(pctrl, pin, false);
1083 if (ret)
1084 return ret;
1085 break;
1086
1087 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
1088 ret = chv_config_set_oden(pctrl, pin, true);
1089 if (ret)
1090 return ret;
1091 break;
1092
1093 default:
1094 return -ENOTSUPP;
1095 }
1096
1097 dev_dbg(pctrl->dev, "pin %d set config %d arg %u\n", pin,
1098 param, arg);
1099 }
1100
1101 return 0;
1102}
1103
1104static int chv_config_group_get(struct pinctrl_dev *pctldev,
1105 unsigned int group,
1106 unsigned long *config)
1107{
1108 const unsigned int *pins;
1109 unsigned int npins;
1110 int ret;
1111
1112 ret = chv_get_group_pins(pctldev, group, &pins, &npins);
1113 if (ret)
1114 return ret;
1115
1116 ret = chv_config_get(pctldev, pins[0], config);
1117 if (ret)
1118 return ret;
1119
1120 return 0;
1121}
1122
1123static int chv_config_group_set(struct pinctrl_dev *pctldev,
1124 unsigned int group, unsigned long *configs,
1125 unsigned int num_configs)
1126{
1127 const unsigned int *pins;
1128 unsigned int npins;
1129 int i, ret;
1130
1131 ret = chv_get_group_pins(pctldev, group, &pins, &npins);
1132 if (ret)
1133 return ret;
1134
1135 for (i = 0; i < npins; i++) {
1136 ret = chv_config_set(pctldev, pins[i], configs, num_configs);
1137 if (ret)
1138 return ret;
1139 }
1140
1141 return 0;
1142}
1143
1144static const struct pinconf_ops chv_pinconf_ops = {
1145 .is_generic = true,
1146 .pin_config_set = chv_config_set,
1147 .pin_config_get = chv_config_get,
1148 .pin_config_group_get = chv_config_group_get,
1149 .pin_config_group_set = chv_config_group_set,
1150};
1151
1152static struct pinctrl_desc chv_pinctrl_desc = {
1153 .pctlops = &chv_pinctrl_ops,
1154 .pmxops = &chv_pinmux_ops,
1155 .confops = &chv_pinconf_ops,
1156 .owner = THIS_MODULE,
1157};
1158
1159static int chv_gpio_get(struct gpio_chip *chip, unsigned int offset)
1160{
1161 struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1162 unsigned long flags;
1163 u32 ctrl0, cfg;
1164
1165 raw_spin_lock_irqsave(&chv_lock, flags);
1166 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
1167 raw_spin_unlock_irqrestore(&chv_lock, flags);
1168
1169 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1170 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1171
1172 if (cfg == CHV_PADCTRL0_GPIOCFG_GPO)
1173 return !!(ctrl0 & CHV_PADCTRL0_GPIOTXSTATE);
1174 return !!(ctrl0 & CHV_PADCTRL0_GPIORXSTATE);
1175}
1176
1177static void chv_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
1178{
1179 struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1180 unsigned long flags;
1181 u32 ctrl0;
1182
1183 raw_spin_lock_irqsave(&chv_lock, flags);
1184
1185 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
1186
1187 if (value)
1188 ctrl0 |= CHV_PADCTRL0_GPIOTXSTATE;
1189 else
1190 ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE;
1191
1192 chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0);
1193
1194 raw_spin_unlock_irqrestore(&chv_lock, flags);
1195}
1196
1197static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
1198{
1199 struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1200 u32 ctrl0, direction;
1201 unsigned long flags;
1202
1203 raw_spin_lock_irqsave(&chv_lock, flags);
1204 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
1205 raw_spin_unlock_irqrestore(&chv_lock, flags);
1206
1207 direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1208 direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1209
1210 if (direction == CHV_PADCTRL0_GPIOCFG_GPO)
1211 return GPIO_LINE_DIRECTION_OUT;
1212
1213 return GPIO_LINE_DIRECTION_IN;
1214}
1215
1216static int chv_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
1217{
1218 return pinctrl_gpio_direction_input(chip->base + offset);
1219}
1220
1221static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned int offset,
1222 int value)
1223{
1224 chv_gpio_set(chip, offset, value);
1225 return pinctrl_gpio_direction_output(chip->base + offset);
1226}
1227
1228static const struct gpio_chip chv_gpio_chip = {
1229 .owner = THIS_MODULE,
1230 .request = gpiochip_generic_request,
1231 .free = gpiochip_generic_free,
1232 .get_direction = chv_gpio_get_direction,
1233 .direction_input = chv_gpio_direction_input,
1234 .direction_output = chv_gpio_direction_output,
1235 .get = chv_gpio_get,
1236 .set = chv_gpio_set,
1237};
1238
1239static void chv_gpio_irq_ack(struct irq_data *d)
1240{
1241 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1242 struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1243 int pin = irqd_to_hwirq(d);
1244 u32 intr_line;
1245
1246 raw_spin_lock(&chv_lock);
1247
1248 intr_line = chv_readl(pctrl, pin, CHV_PADCTRL0);
1249 intr_line &= CHV_PADCTRL0_INTSEL_MASK;
1250 intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
1251 chv_pctrl_writel(pctrl, CHV_INTSTAT, BIT(intr_line));
1252
1253 raw_spin_unlock(&chv_lock);
1254}
1255
1256static void chv_gpio_irq_mask_unmask(struct irq_data *d, bool mask)
1257{
1258 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1259 struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1260 int pin = irqd_to_hwirq(d);
1261 u32 value, intr_line;
1262 unsigned long flags;
1263
1264 raw_spin_lock_irqsave(&chv_lock, flags);
1265
1266 intr_line = chv_readl(pctrl, pin, CHV_PADCTRL0);
1267 intr_line &= CHV_PADCTRL0_INTSEL_MASK;
1268 intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
1269
1270 value = chv_pctrl_readl(pctrl, CHV_INTMASK);
1271 if (mask)
1272 value &= ~BIT(intr_line);
1273 else
1274 value |= BIT(intr_line);
1275 chv_pctrl_writel(pctrl, CHV_INTMASK, value);
1276
1277 raw_spin_unlock_irqrestore(&chv_lock, flags);
1278}
1279
1280static void chv_gpio_irq_mask(struct irq_data *d)
1281{
1282 chv_gpio_irq_mask_unmask(d, true);
1283}
1284
1285static void chv_gpio_irq_unmask(struct irq_data *d)
1286{
1287 chv_gpio_irq_mask_unmask(d, false);
1288}
1289
1290static unsigned chv_gpio_irq_startup(struct irq_data *d)
1291{
1292 /*
1293 * Check if the interrupt has been requested with 0 as triggering
1294 * type. In that case it is assumed that the current values
1295 * programmed to the hardware are used (e.g BIOS configured
1296 * defaults).
1297 *
1298 * In that case ->irq_set_type() will never be called so we need to
1299 * read back the values from hardware now, set correct flow handler
1300 * and update mappings before the interrupt is being used.
1301 */
1302 if (irqd_get_trigger_type(d) == IRQ_TYPE_NONE) {
1303 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1304 struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1305 struct intel_community_context *cctx = &pctrl->context.communities[0];
1306 unsigned int pin = irqd_to_hwirq(d);
1307 irq_flow_handler_t handler;
1308 unsigned long flags;
1309 u32 intsel, value;
1310
1311 raw_spin_lock_irqsave(&chv_lock, flags);
1312 intsel = chv_readl(pctrl, pin, CHV_PADCTRL0);
1313 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1314 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1315
1316 value = chv_readl(pctrl, pin, CHV_PADCTRL1);
1317 if (value & CHV_PADCTRL1_INTWAKECFG_LEVEL)
1318 handler = handle_level_irq;
1319 else
1320 handler = handle_edge_irq;
1321
1322 if (!cctx->intr_lines[intsel]) {
1323 irq_set_handler_locked(d, handler);
1324 cctx->intr_lines[intsel] = pin;
1325 }
1326 raw_spin_unlock_irqrestore(&chv_lock, flags);
1327 }
1328
1329 chv_gpio_irq_unmask(d);
1330 return 0;
1331}
1332
1333static int chv_gpio_irq_type(struct irq_data *d, unsigned int type)
1334{
1335 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1336 struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1337 struct intel_community_context *cctx = &pctrl->context.communities[0];
1338 unsigned int pin = irqd_to_hwirq(d);
1339 unsigned long flags;
1340 u32 value;
1341
1342 raw_spin_lock_irqsave(&chv_lock, flags);
1343
1344 /*
1345 * Pins which can be used as shared interrupt are configured in
1346 * BIOS. Driver trusts BIOS configurations and assigns different
1347 * handler according to the irq type.
1348 *
1349 * Driver needs to save the mapping between each pin and
1350 * its interrupt line.
1351 * 1. If the pin cfg is locked in BIOS:
1352 * Trust BIOS has programmed IntWakeCfg bits correctly,
1353 * driver just needs to save the mapping.
1354 * 2. If the pin cfg is not locked in BIOS:
1355 * Driver programs the IntWakeCfg bits and save the mapping.
1356 */
1357 if (!chv_pad_locked(pctrl, pin)) {
1358 value = chv_readl(pctrl, pin, CHV_PADCTRL1);
1359 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
1360 value &= ~CHV_PADCTRL1_INVRXTX_MASK;
1361
1362 if (type & IRQ_TYPE_EDGE_BOTH) {
1363 if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
1364 value |= CHV_PADCTRL1_INTWAKECFG_BOTH;
1365 else if (type & IRQ_TYPE_EDGE_RISING)
1366 value |= CHV_PADCTRL1_INTWAKECFG_RISING;
1367 else if (type & IRQ_TYPE_EDGE_FALLING)
1368 value |= CHV_PADCTRL1_INTWAKECFG_FALLING;
1369 } else if (type & IRQ_TYPE_LEVEL_MASK) {
1370 value |= CHV_PADCTRL1_INTWAKECFG_LEVEL;
1371 if (type & IRQ_TYPE_LEVEL_LOW)
1372 value |= CHV_PADCTRL1_INVRXTX_RXDATA;
1373 }
1374
1375 chv_writel(pctrl, pin, CHV_PADCTRL1, value);
1376 }
1377
1378 value = chv_readl(pctrl, pin, CHV_PADCTRL0);
1379 value &= CHV_PADCTRL0_INTSEL_MASK;
1380 value >>= CHV_PADCTRL0_INTSEL_SHIFT;
1381
1382 cctx->intr_lines[value] = pin;
1383
1384 if (type & IRQ_TYPE_EDGE_BOTH)
1385 irq_set_handler_locked(d, handle_edge_irq);
1386 else if (type & IRQ_TYPE_LEVEL_MASK)
1387 irq_set_handler_locked(d, handle_level_irq);
1388
1389 raw_spin_unlock_irqrestore(&chv_lock, flags);
1390
1391 return 0;
1392}
1393
1394static void chv_gpio_irq_handler(struct irq_desc *desc)
1395{
1396 struct gpio_chip *gc = irq_desc_get_handler_data(desc);
1397 struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1398 const struct intel_community *community = &pctrl->communities[0];
1399 struct intel_community_context *cctx = &pctrl->context.communities[0];
1400 struct irq_chip *chip = irq_desc_get_chip(desc);
1401 unsigned long pending;
1402 unsigned long flags;
1403 u32 intr_line;
1404
1405 chained_irq_enter(chip, desc);
1406
1407 raw_spin_lock_irqsave(&chv_lock, flags);
1408 pending = chv_pctrl_readl(pctrl, CHV_INTSTAT);
1409 raw_spin_unlock_irqrestore(&chv_lock, flags);
1410
1411 for_each_set_bit(intr_line, &pending, community->nirqs) {
1412 unsigned int irq, offset;
1413
1414 offset = cctx->intr_lines[intr_line];
1415 irq = irq_find_mapping(gc->irq.domain, offset);
1416 generic_handle_irq(irq);
1417 }
1418
1419 chained_irq_exit(chip, desc);
1420}
1421
1422/*
1423 * Certain machines seem to hardcode Linux IRQ numbers in their ACPI
1424 * tables. Since we leave GPIOs that are not capable of generating
1425 * interrupts out of the irqdomain the numbering will be different and
1426 * cause devices using the hardcoded IRQ numbers fail. In order not to
1427 * break such machines we will only mask pins from irqdomain if the machine
1428 * is not listed below.
1429 */
1430static const struct dmi_system_id chv_no_valid_mask[] = {
1431 /* See https://bugzilla.kernel.org/show_bug.cgi?id=194945 */
1432 {
1433 .ident = "Intel_Strago based Chromebooks (All models)",
1434 .matches = {
1435 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1436 DMI_MATCH(DMI_PRODUCT_FAMILY, "Intel_Strago"),
1437 },
1438 },
1439 {
1440 .ident = "HP Chromebook 11 G5 (Setzer)",
1441 .matches = {
1442 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
1443 DMI_MATCH(DMI_PRODUCT_NAME, "Setzer"),
1444 },
1445 },
1446 {
1447 .ident = "Acer Chromebook R11 (Cyan)",
1448 .matches = {
1449 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1450 DMI_MATCH(DMI_PRODUCT_NAME, "Cyan"),
1451 },
1452 },
1453 {
1454 .ident = "Samsung Chromebook 3 (Celes)",
1455 .matches = {
1456 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1457 DMI_MATCH(DMI_PRODUCT_NAME, "Celes"),
1458 },
1459 },
1460 {}
1461};
1462
1463static void chv_init_irq_valid_mask(struct gpio_chip *chip,
1464 unsigned long *valid_mask,
1465 unsigned int ngpios)
1466{
1467 struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1468 const struct intel_community *community = &pctrl->communities[0];
1469 int i;
1470
1471 /* Do not add GPIOs that can only generate GPEs to the IRQ domain */
1472 for (i = 0; i < pctrl->soc->npins; i++) {
1473 const struct pinctrl_pin_desc *desc;
1474 u32 intsel;
1475
1476 desc = &pctrl->soc->pins[i];
1477
1478 intsel = chv_readl(pctrl, desc->number, CHV_PADCTRL0);
1479 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1480 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1481
1482 if (intsel >= community->nirqs)
1483 clear_bit(desc->number, valid_mask);
1484 }
1485}
1486
1487static int chv_gpio_irq_init_hw(struct gpio_chip *chip)
1488{
1489 struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1490 const struct intel_community *community = &pctrl->communities[0];
1491
1492 /*
1493 * The same set of machines in chv_no_valid_mask[] have incorrectly
1494 * configured GPIOs that generate spurious interrupts so we use
1495 * this same list to apply another quirk for them.
1496 *
1497 * See also https://bugzilla.kernel.org/show_bug.cgi?id=197953.
1498 */
1499 if (!pctrl->chip.irq.init_valid_mask) {
1500 /*
1501 * Mask all interrupts the community is able to generate
1502 * but leave the ones that can only generate GPEs unmasked.
1503 */
1504 chv_pctrl_writel(pctrl, CHV_INTMASK, GENMASK(31, community->nirqs));
1505 }
1506
1507 /* Clear all interrupts */
1508 chv_pctrl_writel(pctrl, CHV_INTSTAT, 0xffff);
1509
1510 return 0;
1511}
1512
1513static int chv_gpio_add_pin_ranges(struct gpio_chip *chip)
1514{
1515 struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1516 const struct intel_community *community = &pctrl->communities[0];
1517 const struct intel_padgroup *gpp;
1518 int ret, i;
1519
1520 for (i = 0; i < community->ngpps; i++) {
1521 gpp = &community->gpps[i];
1522 ret = gpiochip_add_pin_range(chip, dev_name(pctrl->dev),
1523 gpp->base, gpp->base,
1524 gpp->size);
1525 if (ret) {
1526 dev_err(pctrl->dev, "failed to add GPIO pin range\n");
1527 return ret;
1528 }
1529 }
1530
1531 return 0;
1532}
1533
1534static int chv_gpio_probe(struct intel_pinctrl *pctrl, int irq)
1535{
1536 const struct intel_community *community = &pctrl->communities[0];
1537 const struct intel_padgroup *gpp;
1538 struct gpio_chip *chip = &pctrl->chip;
1539 bool need_valid_mask = !dmi_check_system(chv_no_valid_mask);
1540 int ret, i, irq_base;
1541
1542 *chip = chv_gpio_chip;
1543
1544 chip->ngpio = pctrl->soc->pins[pctrl->soc->npins - 1].number + 1;
1545 chip->label = dev_name(pctrl->dev);
1546 chip->add_pin_ranges = chv_gpio_add_pin_ranges;
1547 chip->parent = pctrl->dev;
1548 chip->base = -1;
1549
1550 pctrl->irq = irq;
1551 pctrl->irqchip.name = "chv-gpio";
1552 pctrl->irqchip.irq_startup = chv_gpio_irq_startup;
1553 pctrl->irqchip.irq_ack = chv_gpio_irq_ack;
1554 pctrl->irqchip.irq_mask = chv_gpio_irq_mask;
1555 pctrl->irqchip.irq_unmask = chv_gpio_irq_unmask;
1556 pctrl->irqchip.irq_set_type = chv_gpio_irq_type;
1557 pctrl->irqchip.flags = IRQCHIP_SKIP_SET_WAKE;
1558
1559 chip->irq.chip = &pctrl->irqchip;
1560 chip->irq.init_hw = chv_gpio_irq_init_hw;
1561 chip->irq.parent_handler = chv_gpio_irq_handler;
1562 chip->irq.num_parents = 1;
1563 chip->irq.parents = &pctrl->irq;
1564 chip->irq.default_type = IRQ_TYPE_NONE;
1565 chip->irq.handler = handle_bad_irq;
1566 if (need_valid_mask) {
1567 chip->irq.init_valid_mask = chv_init_irq_valid_mask;
1568 } else {
1569 irq_base = devm_irq_alloc_descs(pctrl->dev, -1, 0,
1570 pctrl->soc->npins, NUMA_NO_NODE);
1571 if (irq_base < 0) {
1572 dev_err(pctrl->dev, "Failed to allocate IRQ numbers\n");
1573 return irq_base;
1574 }
1575 }
1576
1577 ret = devm_gpiochip_add_data(pctrl->dev, chip, pctrl);
1578 if (ret) {
1579 dev_err(pctrl->dev, "Failed to register gpiochip\n");
1580 return ret;
1581 }
1582
1583 if (!need_valid_mask) {
1584 for (i = 0; i < community->ngpps; i++) {
1585 gpp = &community->gpps[i];
1586
1587 irq_domain_associate_many(chip->irq.domain, irq_base,
1588 gpp->base, gpp->size);
1589 irq_base += gpp->size;
1590 }
1591 }
1592
1593 return 0;
1594}
1595
1596static acpi_status chv_pinctrl_mmio_access_handler(u32 function,
1597 acpi_physical_address address, u32 bits, u64 *value,
1598 void *handler_context, void *region_context)
1599{
1600 struct intel_pinctrl *pctrl = region_context;
1601 unsigned long flags;
1602 acpi_status ret = AE_OK;
1603
1604 raw_spin_lock_irqsave(&chv_lock, flags);
1605
1606 if (function == ACPI_WRITE)
1607 chv_pctrl_writel(pctrl, address, *value);
1608 else if (function == ACPI_READ)
1609 *value = chv_pctrl_readl(pctrl, address);
1610 else
1611 ret = AE_BAD_PARAMETER;
1612
1613 raw_spin_unlock_irqrestore(&chv_lock, flags);
1614
1615 return ret;
1616}
1617
1618static int chv_pinctrl_probe(struct platform_device *pdev)
1619{
1620 const struct intel_pinctrl_soc_data *soc_data;
1621 struct intel_community *community;
1622 struct device *dev = &pdev->dev;
1623 struct acpi_device *adev = ACPI_COMPANION(dev);
1624 struct intel_pinctrl *pctrl;
1625 acpi_status status;
1626 int ret, irq;
1627
1628 soc_data = intel_pinctrl_get_soc_data(pdev);
1629 if (IS_ERR(soc_data))
1630 return PTR_ERR(soc_data);
1631
1632 pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL);
1633 if (!pctrl)
1634 return -ENOMEM;
1635
1636 pctrl->dev = dev;
1637 pctrl->soc = soc_data;
1638
1639 pctrl->ncommunities = pctrl->soc->ncommunities;
1640 pctrl->communities = devm_kmemdup(dev, pctrl->soc->communities,
1641 pctrl->ncommunities * sizeof(*pctrl->communities),
1642 GFP_KERNEL);
1643 if (!pctrl->communities)
1644 return -ENOMEM;
1645
1646 community = &pctrl->communities[0];
1647 community->regs = devm_platform_ioremap_resource(pdev, 0);
1648 if (IS_ERR(community->regs))
1649 return PTR_ERR(community->regs);
1650
1651 community->pad_regs = community->regs + FAMILY_PAD_REGS_OFF;
1652
1653#ifdef CONFIG_PM_SLEEP
1654 pctrl->context.pads = devm_kcalloc(dev, pctrl->soc->npins,
1655 sizeof(*pctrl->context.pads),
1656 GFP_KERNEL);
1657 if (!pctrl->context.pads)
1658 return -ENOMEM;
1659#endif
1660
1661 pctrl->context.communities = devm_kcalloc(dev, pctrl->soc->ncommunities,
1662 sizeof(*pctrl->context.communities),
1663 GFP_KERNEL);
1664 if (!pctrl->context.communities)
1665 return -ENOMEM;
1666
1667 irq = platform_get_irq(pdev, 0);
1668 if (irq < 0)
1669 return irq;
1670
1671 pctrl->pctldesc = chv_pinctrl_desc;
1672 pctrl->pctldesc.name = dev_name(dev);
1673 pctrl->pctldesc.pins = pctrl->soc->pins;
1674 pctrl->pctldesc.npins = pctrl->soc->npins;
1675
1676 pctrl->pctldev = devm_pinctrl_register(dev, &pctrl->pctldesc, pctrl);
1677 if (IS_ERR(pctrl->pctldev)) {
1678 dev_err(dev, "failed to register pinctrl driver\n");
1679 return PTR_ERR(pctrl->pctldev);
1680 }
1681
1682 ret = chv_gpio_probe(pctrl, irq);
1683 if (ret)
1684 return ret;
1685
1686 status = acpi_install_address_space_handler(adev->handle,
1687 community->acpi_space_id,
1688 chv_pinctrl_mmio_access_handler,
1689 NULL, pctrl);
1690 if (ACPI_FAILURE(status))
1691 dev_err(dev, "failed to install ACPI addr space handler\n");
1692
1693 platform_set_drvdata(pdev, pctrl);
1694
1695 return 0;
1696}
1697
1698static int chv_pinctrl_remove(struct platform_device *pdev)
1699{
1700 struct intel_pinctrl *pctrl = platform_get_drvdata(pdev);
1701 const struct intel_community *community = &pctrl->communities[0];
1702
1703 acpi_remove_address_space_handler(ACPI_COMPANION(&pdev->dev),
1704 community->acpi_space_id,
1705 chv_pinctrl_mmio_access_handler);
1706
1707 return 0;
1708}
1709
1710#ifdef CONFIG_PM_SLEEP
1711static int chv_pinctrl_suspend_noirq(struct device *dev)
1712{
1713 struct intel_pinctrl *pctrl = dev_get_drvdata(dev);
1714 struct intel_community_context *cctx = &pctrl->context.communities[0];
1715 unsigned long flags;
1716 int i;
1717
1718 raw_spin_lock_irqsave(&chv_lock, flags);
1719
1720 cctx->saved_intmask = chv_pctrl_readl(pctrl, CHV_INTMASK);
1721
1722 for (i = 0; i < pctrl->soc->npins; i++) {
1723 const struct pinctrl_pin_desc *desc;
1724 struct intel_pad_context *ctx = &pctrl->context.pads[i];
1725
1726 desc = &pctrl->soc->pins[i];
1727 if (chv_pad_locked(pctrl, desc->number))
1728 continue;
1729
1730 ctx->padctrl0 = chv_readl(pctrl, desc->number, CHV_PADCTRL0);
1731 ctx->padctrl0 &= ~CHV_PADCTRL0_GPIORXSTATE;
1732
1733 ctx->padctrl1 = chv_readl(pctrl, desc->number, CHV_PADCTRL1);
1734 }
1735
1736 raw_spin_unlock_irqrestore(&chv_lock, flags);
1737
1738 return 0;
1739}
1740
1741static int chv_pinctrl_resume_noirq(struct device *dev)
1742{
1743 struct intel_pinctrl *pctrl = dev_get_drvdata(dev);
1744 struct intel_community_context *cctx = &pctrl->context.communities[0];
1745 unsigned long flags;
1746 int i;
1747
1748 raw_spin_lock_irqsave(&chv_lock, flags);
1749
1750 /*
1751 * Mask all interrupts before restoring per-pin configuration
1752 * registers because we don't know in which state BIOS left them
1753 * upon exiting suspend.
1754 */
1755 chv_pctrl_writel(pctrl, CHV_INTMASK, 0x0000);
1756
1757 for (i = 0; i < pctrl->soc->npins; i++) {
1758 const struct pinctrl_pin_desc *desc;
1759 struct intel_pad_context *ctx = &pctrl->context.pads[i];
1760 u32 val;
1761
1762 desc = &pctrl->soc->pins[i];
1763 if (chv_pad_locked(pctrl, desc->number))
1764 continue;
1765
1766 /* Only restore if our saved state differs from the current */
1767 val = chv_readl(pctrl, desc->number, CHV_PADCTRL0);
1768 val &= ~CHV_PADCTRL0_GPIORXSTATE;
1769 if (ctx->padctrl0 != val) {
1770 chv_writel(pctrl, desc->number, CHV_PADCTRL0, ctx->padctrl0);
1771 dev_dbg(pctrl->dev, "restored pin %2u ctrl0 0x%08x\n",
1772 desc->number, chv_readl(pctrl, desc->number, CHV_PADCTRL0));
1773 }
1774
1775 val = chv_readl(pctrl, desc->number, CHV_PADCTRL1);
1776 if (ctx->padctrl1 != val) {
1777 chv_writel(pctrl, desc->number, CHV_PADCTRL1, ctx->padctrl1);
1778 dev_dbg(pctrl->dev, "restored pin %2u ctrl1 0x%08x\n",
1779 desc->number, chv_readl(pctrl, desc->number, CHV_PADCTRL1));
1780 }
1781 }
1782
1783 /*
1784 * Now that all pins are restored to known state, we can restore
1785 * the interrupt mask register as well.
1786 */
1787 chv_pctrl_writel(pctrl, CHV_INTSTAT, 0xffff);
1788 chv_pctrl_writel(pctrl, CHV_INTMASK, cctx->saved_intmask);
1789
1790 raw_spin_unlock_irqrestore(&chv_lock, flags);
1791
1792 return 0;
1793}
1794#endif
1795
1796static const struct dev_pm_ops chv_pinctrl_pm_ops = {
1797 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(chv_pinctrl_suspend_noirq,
1798 chv_pinctrl_resume_noirq)
1799};
1800
1801static const struct acpi_device_id chv_pinctrl_acpi_match[] = {
1802 { "INT33FF", (kernel_ulong_t)chv_soc_data },
1803 { }
1804};
1805MODULE_DEVICE_TABLE(acpi, chv_pinctrl_acpi_match);
1806
1807static struct platform_driver chv_pinctrl_driver = {
1808 .probe = chv_pinctrl_probe,
1809 .remove = chv_pinctrl_remove,
1810 .driver = {
1811 .name = "cherryview-pinctrl",
1812 .pm = &chv_pinctrl_pm_ops,
1813 .acpi_match_table = chv_pinctrl_acpi_match,
1814 },
1815};
1816
1817static int __init chv_pinctrl_init(void)
1818{
1819 return platform_driver_register(&chv_pinctrl_driver);
1820}
1821subsys_initcall(chv_pinctrl_init);
1822
1823static void __exit chv_pinctrl_exit(void)
1824{
1825 platform_driver_unregister(&chv_pinctrl_driver);
1826}
1827module_exit(chv_pinctrl_exit);
1828
1829MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
1830MODULE_DESCRIPTION("Intel Cherryview/Braswell pinctrl driver");
1831MODULE_LICENSE("GPL v2");