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module: Convert symbol namespace to string literal
[linux.git] / drivers / pinctrl / intel / pinctrl-cherryview.c
blobc673e262e1dbcc938503bf2136cc043838678651
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/array_size.h>
15 #include <linux/cleanup.h>
16 #include <linux/dmi.h>
17 #include <linux/gpio/driver.h>
18 #include <linux/module.h>
19 #include <linux/platform_device.h>
20 #include <linux/seq_file.h>
21 #include <linux/types.h>
22
23 #include <linux/pinctrl/consumer.h>
24 #include <linux/pinctrl/pinconf-generic.h>
25 #include <linux/pinctrl/pinconf.h>
26 #include <linux/pinctrl/pinctrl.h>
27 #include <linux/pinctrl/pinmux.h>
28
29 #include "pinctrl-intel.h"
30
31 #define CHV_INTSTAT 0x300
32 #define CHV_INTMASK 0x380
33
34 #define FAMILY_PAD_REGS_OFF 0x4400
35 #define FAMILY_PAD_REGS_SIZE 0x400
36 #define MAX_FAMILY_PAD_GPIO_NO 15
37 #define GPIO_REGS_SIZE 8
38
39 #define CHV_PADCTRL0 0x000
40 #define CHV_PADCTRL0_INTSEL_SHIFT 28
41 #define CHV_PADCTRL0_INTSEL_MASK GENMASK(31, 28)
42 #define CHV_PADCTRL0_TERM_UP BIT(23)
43 #define CHV_PADCTRL0_TERM_SHIFT 20
44 #define CHV_PADCTRL0_TERM_MASK GENMASK(22, 20)
45 #define CHV_PADCTRL0_TERM_20K 1
46 #define CHV_PADCTRL0_TERM_5K 2
47 #define CHV_PADCTRL0_TERM_1K 4
48 #define CHV_PADCTRL0_PMODE_SHIFT 16
49 #define CHV_PADCTRL0_PMODE_MASK GENMASK(19, 16)
50 #define CHV_PADCTRL0_GPIOEN BIT(15)
51 #define CHV_PADCTRL0_GPIOCFG_SHIFT 8
52 #define CHV_PADCTRL0_GPIOCFG_MASK GENMASK(10, 8)
53 #define CHV_PADCTRL0_GPIOCFG_GPIO 0
54 #define CHV_PADCTRL0_GPIOCFG_GPO 1
55 #define CHV_PADCTRL0_GPIOCFG_GPI 2
56 #define CHV_PADCTRL0_GPIOCFG_HIZ 3
57 #define CHV_PADCTRL0_GPIOTXSTATE BIT(1)
58 #define CHV_PADCTRL0_GPIORXSTATE BIT(0)
59
60 #define CHV_PADCTRL1 0x004
61 #define CHV_PADCTRL1_CFGLOCK BIT(31)
62 #define CHV_PADCTRL1_INVRXTX_SHIFT 4
63 #define CHV_PADCTRL1_INVRXTX_MASK GENMASK(7, 4)
64 #define CHV_PADCTRL1_INVRXTX_TXDATA BIT(7)
65 #define CHV_PADCTRL1_INVRXTX_RXDATA BIT(6)
66 #define CHV_PADCTRL1_INVRXTX_TXENABLE BIT(5)
67 #define CHV_PADCTRL1_ODEN BIT(3)
68 #define CHV_PADCTRL1_INTWAKECFG_MASK GENMASK(2, 0)
69 #define CHV_PADCTRL1_INTWAKECFG_FALLING 1
70 #define CHV_PADCTRL1_INTWAKECFG_RISING 2
71 #define CHV_PADCTRL1_INTWAKECFG_BOTH 3
72 #define CHV_PADCTRL1_INTWAKECFG_LEVEL 4
73
74 struct intel_pad_context {
75 u32 padctrl0;
76 u32 padctrl1;
77 };
78
79 #define CHV_INVALID_HWIRQ (~0U)
80
81 /**
82 * struct intel_community_context - community context for Cherryview
83 * @intr_lines: Mapping between 16 HW interrupt wires and GPIO offset (in GPIO number space)
84 * @saved_intmask: Interrupt mask saved for system sleep
85 */
86 struct intel_community_context {
87 unsigned int intr_lines[16];
88 u32 saved_intmask;
89 };
90
91 #define PINMODE_INVERT_OE BIT(15)
92
93 #define PINMODE(m, i) ((m) | ((i) * PINMODE_INVERT_OE))
94
95 #define CHV_GPP(start, end) \
96 { \
97 .base = (start), \
98 .size = (end) - (start) + 1, \
99 }
100
101 #define CHV_COMMUNITY(g, i, a) \
102 { \
103 .gpps = (g), \
104 .ngpps = ARRAY_SIZE(g), \
105 .nirqs = (i), \
106 .acpi_space_id = (a), \
107 }
108
109 static const struct pinctrl_pin_desc southwest_pins[] = {
110 PINCTRL_PIN(0, "FST_SPI_D2"),
111 PINCTRL_PIN(1, "FST_SPI_D0"),
112 PINCTRL_PIN(2, "FST_SPI_CLK"),
113 PINCTRL_PIN(3, "FST_SPI_D3"),
114 PINCTRL_PIN(4, "FST_SPI_CS1_B"),
115 PINCTRL_PIN(5, "FST_SPI_D1"),
116 PINCTRL_PIN(6, "FST_SPI_CS0_B"),
117 PINCTRL_PIN(7, "FST_SPI_CS2_B"),
118
119 PINCTRL_PIN(15, "UART1_RTS_B"),
120 PINCTRL_PIN(16, "UART1_RXD"),
121 PINCTRL_PIN(17, "UART2_RXD"),
122 PINCTRL_PIN(18, "UART1_CTS_B"),
123 PINCTRL_PIN(19, "UART2_RTS_B"),
124 PINCTRL_PIN(20, "UART1_TXD"),
125 PINCTRL_PIN(21, "UART2_TXD"),
126 PINCTRL_PIN(22, "UART2_CTS_B"),
127
128 PINCTRL_PIN(30, "MF_HDA_CLK"),
129 PINCTRL_PIN(31, "MF_HDA_RSTB"),
130 PINCTRL_PIN(32, "MF_HDA_SDIO"),
131 PINCTRL_PIN(33, "MF_HDA_SDO"),
132 PINCTRL_PIN(34, "MF_HDA_DOCKRSTB"),
133 PINCTRL_PIN(35, "MF_HDA_SYNC"),
134 PINCTRL_PIN(36, "MF_HDA_SDI1"),
135 PINCTRL_PIN(37, "MF_HDA_DOCKENB"),
136
137 PINCTRL_PIN(45, "I2C5_SDA"),
138 PINCTRL_PIN(46, "I2C4_SDA"),
139 PINCTRL_PIN(47, "I2C6_SDA"),
140 PINCTRL_PIN(48, "I2C5_SCL"),
141 PINCTRL_PIN(49, "I2C_NFC_SDA"),
142 PINCTRL_PIN(50, "I2C4_SCL"),
143 PINCTRL_PIN(51, "I2C6_SCL"),
144 PINCTRL_PIN(52, "I2C_NFC_SCL"),
145
146 PINCTRL_PIN(60, "I2C1_SDA"),
147 PINCTRL_PIN(61, "I2C0_SDA"),
148 PINCTRL_PIN(62, "I2C2_SDA"),
149 PINCTRL_PIN(63, "I2C1_SCL"),
150 PINCTRL_PIN(64, "I2C3_SDA"),
151 PINCTRL_PIN(65, "I2C0_SCL"),
152 PINCTRL_PIN(66, "I2C2_SCL"),
153 PINCTRL_PIN(67, "I2C3_SCL"),
154
155 PINCTRL_PIN(75, "SATA_GP0"),
156 PINCTRL_PIN(76, "SATA_GP1"),
157 PINCTRL_PIN(77, "SATA_LEDN"),
158 PINCTRL_PIN(78, "SATA_GP2"),
159 PINCTRL_PIN(79, "MF_SMB_ALERTB"),
160 PINCTRL_PIN(80, "SATA_GP3"),
161 PINCTRL_PIN(81, "MF_SMB_CLK"),
162 PINCTRL_PIN(82, "MF_SMB_DATA"),
163
164 PINCTRL_PIN(90, "PCIE_CLKREQ0B"),
165 PINCTRL_PIN(91, "PCIE_CLKREQ1B"),
166 PINCTRL_PIN(92, "GP_SSP_2_CLK"),
167 PINCTRL_PIN(93, "PCIE_CLKREQ2B"),
168 PINCTRL_PIN(94, "GP_SSP_2_RXD"),
169 PINCTRL_PIN(95, "PCIE_CLKREQ3B"),
170 PINCTRL_PIN(96, "GP_SSP_2_FS"),
171 PINCTRL_PIN(97, "GP_SSP_2_TXD"),
172 };
173
174 static const unsigned southwest_uart0_pins[] = { 16, 20 };
175 static const unsigned southwest_uart1_pins[] = { 15, 16, 18, 20 };
176 static const unsigned southwest_uart2_pins[] = { 17, 19, 21, 22 };
177 static const unsigned southwest_i2c0_pins[] = { 61, 65 };
178 static const unsigned southwest_hda_pins[] = { 30, 31, 32, 33, 34, 35, 36, 37 };
179 static const unsigned southwest_lpe_pins[] = {
180 30, 31, 32, 33, 34, 35, 36, 37, 92, 94, 96, 97,
181 };
182 static const unsigned southwest_i2c1_pins[] = { 60, 63 };
183 static const unsigned southwest_i2c2_pins[] = { 62, 66 };
184 static const unsigned southwest_i2c3_pins[] = { 64, 67 };
185 static const unsigned southwest_i2c4_pins[] = { 46, 50 };
186 static const unsigned southwest_i2c5_pins[] = { 45, 48 };
187 static const unsigned southwest_i2c6_pins[] = { 47, 51 };
188 static const unsigned southwest_i2c_nfc_pins[] = { 49, 52 };
189 static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 };
190
191 /* Some of LPE I2S TXD pins need to have OE inversion set */
192 static const unsigned int southwest_lpe_altfuncs[] = {
193 PINMODE(1, 1), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), /* 30, 31, 32, 33 */
194 PINMODE(1, 1), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), /* 34, 35, 36, 37 */
195 PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 1), /* 92, 94, 96, 97 */
196 };
197
198 /*
199 * Two spi3 chipselects are available in different mode than the main spi3
200 * functionality, which is using mode 2.
201 */
202 static const unsigned int southwest_spi3_altfuncs[] = {
203 PINMODE(3, 0), PINMODE(2, 0), PINMODE(3, 0), PINMODE(2, 0), /* 76, 79, 80, 81 */
204 PINMODE(2, 0), /* 82 */
205 };
206
207 static const struct intel_pingroup southwest_groups[] = {
208 PIN_GROUP("uart0_grp", southwest_uart0_pins, PINMODE(2, 0)),
209 PIN_GROUP("uart1_grp", southwest_uart1_pins, PINMODE(1, 0)),
210 PIN_GROUP("uart2_grp", southwest_uart2_pins, PINMODE(1, 0)),
211 PIN_GROUP("hda_grp", southwest_hda_pins, PINMODE(2, 0)),
212 PIN_GROUP("i2c0_grp", southwest_i2c0_pins, PINMODE(1, 1)),
213 PIN_GROUP("i2c1_grp", southwest_i2c1_pins, PINMODE(1, 1)),
214 PIN_GROUP("i2c2_grp", southwest_i2c2_pins, PINMODE(1, 1)),
215 PIN_GROUP("i2c3_grp", southwest_i2c3_pins, PINMODE(1, 1)),
216 PIN_GROUP("i2c4_grp", southwest_i2c4_pins, PINMODE(1, 1)),
217 PIN_GROUP("i2c5_grp", southwest_i2c5_pins, PINMODE(1, 1)),
218 PIN_GROUP("i2c6_grp", southwest_i2c6_pins, PINMODE(1, 1)),
219 PIN_GROUP("i2c_nfc_grp", southwest_i2c_nfc_pins, PINMODE(2, 1)),
220 PIN_GROUP("lpe_grp", southwest_lpe_pins, southwest_lpe_altfuncs),
221 PIN_GROUP("spi3_grp", southwest_spi3_pins, southwest_spi3_altfuncs),
222 };
223
224 static const char * const southwest_uart0_groups[] = { "uart0_grp" };
225 static const char * const southwest_uart1_groups[] = { "uart1_grp" };
226 static const char * const southwest_uart2_groups[] = { "uart2_grp" };
227 static const char * const southwest_hda_groups[] = { "hda_grp" };
228 static const char * const southwest_lpe_groups[] = { "lpe_grp" };
229 static const char * const southwest_i2c0_groups[] = { "i2c0_grp" };
230 static const char * const southwest_i2c1_groups[] = { "i2c1_grp" };
231 static const char * const southwest_i2c2_groups[] = { "i2c2_grp" };
232 static const char * const southwest_i2c3_groups[] = { "i2c3_grp" };
233 static const char * const southwest_i2c4_groups[] = { "i2c4_grp" };
234 static const char * const southwest_i2c5_groups[] = { "i2c5_grp" };
235 static const char * const southwest_i2c6_groups[] = { "i2c6_grp" };
236 static const char * const southwest_i2c_nfc_groups[] = { "i2c_nfc_grp" };
237 static const char * const southwest_spi3_groups[] = { "spi3_grp" };
238
239 /*
240 * Only do pinmuxing for certain LPSS devices for now. Rest of the pins are
241 * enabled only as GPIOs.
242 */
243 static const struct intel_function southwest_functions[] = {
244 FUNCTION("uart0", southwest_uart0_groups),
245 FUNCTION("uart1", southwest_uart1_groups),
246 FUNCTION("uart2", southwest_uart2_groups),
247 FUNCTION("hda", southwest_hda_groups),
248 FUNCTION("lpe", southwest_lpe_groups),
249 FUNCTION("i2c0", southwest_i2c0_groups),
250 FUNCTION("i2c1", southwest_i2c1_groups),
251 FUNCTION("i2c2", southwest_i2c2_groups),
252 FUNCTION("i2c3", southwest_i2c3_groups),
253 FUNCTION("i2c4", southwest_i2c4_groups),
254 FUNCTION("i2c5", southwest_i2c5_groups),
255 FUNCTION("i2c6", southwest_i2c6_groups),
256 FUNCTION("i2c_nfc", southwest_i2c_nfc_groups),
257 FUNCTION("spi3", southwest_spi3_groups),
258 };
259
260 static const struct intel_padgroup southwest_gpps[] = {
261 CHV_GPP(0, 7),
262 CHV_GPP(15, 22),
263 CHV_GPP(30, 37),
264 CHV_GPP(45, 52),
265 CHV_GPP(60, 67),
266 CHV_GPP(75, 82),
267 CHV_GPP(90, 97),
268 };
269
270 /*
271 * Southwest community can generate GPIO interrupts only for the first 8
272 * interrupts. The upper half (8-15) can only be used to trigger GPEs.
273 */
274 static const struct intel_community southwest_communities[] = {
275 CHV_COMMUNITY(southwest_gpps, 8, 0x91),
276 };
277
278 static const struct intel_pinctrl_soc_data southwest_soc_data = {
279 .uid = "1",
280 .pins = southwest_pins,
281 .npins = ARRAY_SIZE(southwest_pins),
282 .groups = southwest_groups,
283 .ngroups = ARRAY_SIZE(southwest_groups),
284 .functions = southwest_functions,
285 .nfunctions = ARRAY_SIZE(southwest_functions),
286 .communities = southwest_communities,
287 .ncommunities = ARRAY_SIZE(southwest_communities),
288 };
289
290 static const struct pinctrl_pin_desc north_pins[] = {
291 PINCTRL_PIN(0, "GPIO_DFX_0"),
292 PINCTRL_PIN(1, "GPIO_DFX_3"),
293 PINCTRL_PIN(2, "GPIO_DFX_7"),
294 PINCTRL_PIN(3, "GPIO_DFX_1"),
295 PINCTRL_PIN(4, "GPIO_DFX_5"),
296 PINCTRL_PIN(5, "GPIO_DFX_4"),
297 PINCTRL_PIN(6, "GPIO_DFX_8"),
298 PINCTRL_PIN(7, "GPIO_DFX_2"),
299 PINCTRL_PIN(8, "GPIO_DFX_6"),
300
301 PINCTRL_PIN(15, "GPIO_SUS0"),
302 PINCTRL_PIN(16, "SEC_GPIO_SUS10"),
303 PINCTRL_PIN(17, "GPIO_SUS3"),
304 PINCTRL_PIN(18, "GPIO_SUS7"),
305 PINCTRL_PIN(19, "GPIO_SUS1"),
306 PINCTRL_PIN(20, "GPIO_SUS5"),
307 PINCTRL_PIN(21, "SEC_GPIO_SUS11"),
308 PINCTRL_PIN(22, "GPIO_SUS4"),
309 PINCTRL_PIN(23, "SEC_GPIO_SUS8"),
310 PINCTRL_PIN(24, "GPIO_SUS2"),
311 PINCTRL_PIN(25, "GPIO_SUS6"),
312 PINCTRL_PIN(26, "CX_PREQ_B"),
313 PINCTRL_PIN(27, "SEC_GPIO_SUS9"),
314
315 PINCTRL_PIN(30, "TRST_B"),
316 PINCTRL_PIN(31, "TCK"),
317 PINCTRL_PIN(32, "PROCHOT_B"),
318 PINCTRL_PIN(33, "SVIDO_DATA"),
319 PINCTRL_PIN(34, "TMS"),
320 PINCTRL_PIN(35, "CX_PRDY_B_2"),
321 PINCTRL_PIN(36, "TDO_2"),
322 PINCTRL_PIN(37, "CX_PRDY_B"),
323 PINCTRL_PIN(38, "SVIDO_ALERT_B"),
324 PINCTRL_PIN(39, "TDO"),
325 PINCTRL_PIN(40, "SVIDO_CLK"),
326 PINCTRL_PIN(41, "TDI"),
327
328 PINCTRL_PIN(45, "GP_CAMERASB_05"),
329 PINCTRL_PIN(46, "GP_CAMERASB_02"),
330 PINCTRL_PIN(47, "GP_CAMERASB_08"),
331 PINCTRL_PIN(48, "GP_CAMERASB_00"),
332 PINCTRL_PIN(49, "GP_CAMERASB_06"),
333 PINCTRL_PIN(50, "GP_CAMERASB_10"),
334 PINCTRL_PIN(51, "GP_CAMERASB_03"),
335 PINCTRL_PIN(52, "GP_CAMERASB_09"),
336 PINCTRL_PIN(53, "GP_CAMERASB_01"),
337 PINCTRL_PIN(54, "GP_CAMERASB_07"),
338 PINCTRL_PIN(55, "GP_CAMERASB_11"),
339 PINCTRL_PIN(56, "GP_CAMERASB_04"),
340
341 PINCTRL_PIN(60, "PANEL0_BKLTEN"),
342 PINCTRL_PIN(61, "HV_DDI0_HPD"),
343 PINCTRL_PIN(62, "HV_DDI2_DDC_SDA"),
344 PINCTRL_PIN(63, "PANEL1_BKLTCTL"),
345 PINCTRL_PIN(64, "HV_DDI1_HPD"),
346 PINCTRL_PIN(65, "PANEL0_BKLTCTL"),
347 PINCTRL_PIN(66, "HV_DDI0_DDC_SDA"),
348 PINCTRL_PIN(67, "HV_DDI2_DDC_SCL"),
349 PINCTRL_PIN(68, "HV_DDI2_HPD"),
350 PINCTRL_PIN(69, "PANEL1_VDDEN"),
351 PINCTRL_PIN(70, "PANEL1_BKLTEN"),
352 PINCTRL_PIN(71, "HV_DDI0_DDC_SCL"),
353 PINCTRL_PIN(72, "PANEL0_VDDEN"),
354 };
355
356 static const struct intel_padgroup north_gpps[] = {
357 CHV_GPP(0, 8),
358 CHV_GPP(15, 27),
359 CHV_GPP(30, 41),
360 CHV_GPP(45, 56),
361 CHV_GPP(60, 72),
362 };
363
364 /*
365 * North community can generate GPIO interrupts only for the first 8
366 * interrupts. The upper half (8-15) can only be used to trigger GPEs.
367 */
368 static const struct intel_community north_communities[] = {
369 CHV_COMMUNITY(north_gpps, 8, 0x92),
370 };
371
372 static const struct intel_pinctrl_soc_data north_soc_data = {
373 .uid = "2",
374 .pins = north_pins,
375 .npins = ARRAY_SIZE(north_pins),
376 .communities = north_communities,
377 .ncommunities = ARRAY_SIZE(north_communities),
378 };
379
380 static const struct pinctrl_pin_desc east_pins[] = {
381 PINCTRL_PIN(0, "PMU_SLP_S3_B"),
382 PINCTRL_PIN(1, "PMU_BATLOW_B"),
383 PINCTRL_PIN(2, "SUS_STAT_B"),
384 PINCTRL_PIN(3, "PMU_SLP_S0IX_B"),
385 PINCTRL_PIN(4, "PMU_AC_PRESENT"),
386 PINCTRL_PIN(5, "PMU_PLTRST_B"),
387 PINCTRL_PIN(6, "PMU_SUSCLK"),
388 PINCTRL_PIN(7, "PMU_SLP_LAN_B"),
389 PINCTRL_PIN(8, "PMU_PWRBTN_B"),
390 PINCTRL_PIN(9, "PMU_SLP_S4_B"),
391 PINCTRL_PIN(10, "PMU_WAKE_B"),
392 PINCTRL_PIN(11, "PMU_WAKE_LAN_B"),
393
394 PINCTRL_PIN(15, "MF_ISH_GPIO_3"),
395 PINCTRL_PIN(16, "MF_ISH_GPIO_7"),
396 PINCTRL_PIN(17, "MF_ISH_I2C1_SCL"),
397 PINCTRL_PIN(18, "MF_ISH_GPIO_1"),
398 PINCTRL_PIN(19, "MF_ISH_GPIO_5"),
399 PINCTRL_PIN(20, "MF_ISH_GPIO_9"),
400 PINCTRL_PIN(21, "MF_ISH_GPIO_0"),
401 PINCTRL_PIN(22, "MF_ISH_GPIO_4"),
402 PINCTRL_PIN(23, "MF_ISH_GPIO_8"),
403 PINCTRL_PIN(24, "MF_ISH_GPIO_2"),
404 PINCTRL_PIN(25, "MF_ISH_GPIO_6"),
405 PINCTRL_PIN(26, "MF_ISH_I2C1_SDA"),
406 };
407
408 static const struct intel_padgroup east_gpps[] = {
409 CHV_GPP(0, 11),
410 CHV_GPP(15, 26),
411 };
412
413 static const struct intel_community east_communities[] = {
414 CHV_COMMUNITY(east_gpps, 16, 0x93),
415 };
416
417 static const struct intel_pinctrl_soc_data east_soc_data = {
418 .uid = "3",
419 .pins = east_pins,
420 .npins = ARRAY_SIZE(east_pins),
421 .communities = east_communities,
422 .ncommunities = ARRAY_SIZE(east_communities),
423 };
424
425 static const struct pinctrl_pin_desc southeast_pins[] = {
426 PINCTRL_PIN(0, "MF_PLT_CLK0"),
427 PINCTRL_PIN(1, "PWM1"),
428 PINCTRL_PIN(2, "MF_PLT_CLK1"),
429 PINCTRL_PIN(3, "MF_PLT_CLK4"),
430 PINCTRL_PIN(4, "MF_PLT_CLK3"),
431 PINCTRL_PIN(5, "PWM0"),
432 PINCTRL_PIN(6, "MF_PLT_CLK5"),
433 PINCTRL_PIN(7, "MF_PLT_CLK2"),
434
435 PINCTRL_PIN(15, "SDMMC2_D3_CD_B"),
436 PINCTRL_PIN(16, "SDMMC1_CLK"),
437 PINCTRL_PIN(17, "SDMMC1_D0"),
438 PINCTRL_PIN(18, "SDMMC2_D1"),
439 PINCTRL_PIN(19, "SDMMC2_CLK"),
440 PINCTRL_PIN(20, "SDMMC1_D2"),
441 PINCTRL_PIN(21, "SDMMC2_D2"),
442 PINCTRL_PIN(22, "SDMMC2_CMD"),
443 PINCTRL_PIN(23, "SDMMC1_CMD"),
444 PINCTRL_PIN(24, "SDMMC1_D1"),
445 PINCTRL_PIN(25, "SDMMC2_D0"),
446 PINCTRL_PIN(26, "SDMMC1_D3_CD_B"),
447
448 PINCTRL_PIN(30, "SDMMC3_D1"),
449 PINCTRL_PIN(31, "SDMMC3_CLK"),
450 PINCTRL_PIN(32, "SDMMC3_D3"),
451 PINCTRL_PIN(33, "SDMMC3_D2"),
452 PINCTRL_PIN(34, "SDMMC3_CMD"),
453 PINCTRL_PIN(35, "SDMMC3_D0"),
454
455 PINCTRL_PIN(45, "MF_LPC_AD2"),
456 PINCTRL_PIN(46, "LPC_CLKRUNB"),
457 PINCTRL_PIN(47, "MF_LPC_AD0"),
458 PINCTRL_PIN(48, "LPC_FRAMEB"),
459 PINCTRL_PIN(49, "MF_LPC_CLKOUT1"),
460 PINCTRL_PIN(50, "MF_LPC_AD3"),
461 PINCTRL_PIN(51, "MF_LPC_CLKOUT0"),
462 PINCTRL_PIN(52, "MF_LPC_AD1"),
463
464 PINCTRL_PIN(60, "SPI1_MISO"),
465 PINCTRL_PIN(61, "SPI1_CSO_B"),
466 PINCTRL_PIN(62, "SPI1_CLK"),
467 PINCTRL_PIN(63, "MMC1_D6"),
468 PINCTRL_PIN(64, "SPI1_MOSI"),
469 PINCTRL_PIN(65, "MMC1_D5"),
470 PINCTRL_PIN(66, "SPI1_CS1_B"),
471 PINCTRL_PIN(67, "MMC1_D4_SD_WE"),
472 PINCTRL_PIN(68, "MMC1_D7"),
473 PINCTRL_PIN(69, "MMC1_RCLK"),
474
475 PINCTRL_PIN(75, "USB_OC1_B"),
476 PINCTRL_PIN(76, "PMU_RESETBUTTON_B"),
477 PINCTRL_PIN(77, "GPIO_ALERT"),
478 PINCTRL_PIN(78, "SDMMC3_PWR_EN_B"),
479 PINCTRL_PIN(79, "ILB_SERIRQ"),
480 PINCTRL_PIN(80, "USB_OC0_B"),
481 PINCTRL_PIN(81, "SDMMC3_CD_B"),
482 PINCTRL_PIN(82, "SPKR"),
483 PINCTRL_PIN(83, "SUSPWRDNACK"),
484 PINCTRL_PIN(84, "SPARE_PIN"),
485 PINCTRL_PIN(85, "SDMMC3_1P8_EN"),
486 };
487
488 static const unsigned southeast_pwm0_pins[] = { 5 };
489 static const unsigned southeast_pwm1_pins[] = { 1 };
490 static const unsigned southeast_sdmmc1_pins[] = {
491 16, 17, 20, 23, 24, 26, 63, 65, 67, 68, 69,
492 };
493 static const unsigned southeast_sdmmc2_pins[] = { 15, 18, 19, 21, 22, 25 };
494 static const unsigned southeast_sdmmc3_pins[] = {
495 30, 31, 32, 33, 34, 35, 78, 81, 85,
496 };
497 static const unsigned southeast_spi1_pins[] = { 60, 61, 62, 64, 66 };
498 static const unsigned southeast_spi2_pins[] = { 2, 3, 4, 6, 7 };
499
500 static const struct intel_pingroup southeast_groups[] = {
501 PIN_GROUP("pwm0_grp", southeast_pwm0_pins, PINMODE(1, 0)),
502 PIN_GROUP("pwm1_grp", southeast_pwm1_pins, PINMODE(1, 0)),
503 PIN_GROUP("sdmmc1_grp", southeast_sdmmc1_pins, PINMODE(1, 0)),
504 PIN_GROUP("sdmmc2_grp", southeast_sdmmc2_pins, PINMODE(1, 0)),
505 PIN_GROUP("sdmmc3_grp", southeast_sdmmc3_pins, PINMODE(1, 0)),
506 PIN_GROUP("spi1_grp", southeast_spi1_pins, PINMODE(1, 0)),
507 PIN_GROUP("spi2_grp", southeast_spi2_pins, PINMODE(4, 0)),
508 };
509
510 static const char * const southeast_pwm0_groups[] = { "pwm0_grp" };
511 static const char * const southeast_pwm1_groups[] = { "pwm1_grp" };
512 static const char * const southeast_sdmmc1_groups[] = { "sdmmc1_grp" };
513 static const char * const southeast_sdmmc2_groups[] = { "sdmmc2_grp" };
514 static const char * const southeast_sdmmc3_groups[] = { "sdmmc3_grp" };
515 static const char * const southeast_spi1_groups[] = { "spi1_grp" };
516 static const char * const southeast_spi2_groups[] = { "spi2_grp" };
517
518 static const struct intel_function southeast_functions[] = {
519 FUNCTION("pwm0", southeast_pwm0_groups),
520 FUNCTION("pwm1", southeast_pwm1_groups),
521 FUNCTION("sdmmc1", southeast_sdmmc1_groups),
522 FUNCTION("sdmmc2", southeast_sdmmc2_groups),
523 FUNCTION("sdmmc3", southeast_sdmmc3_groups),
524 FUNCTION("spi1", southeast_spi1_groups),
525 FUNCTION("spi2", southeast_spi2_groups),
526 };
527
528 static const struct intel_padgroup southeast_gpps[] = {
529 CHV_GPP(0, 7),
530 CHV_GPP(15, 26),
531 CHV_GPP(30, 35),
532 CHV_GPP(45, 52),
533 CHV_GPP(60, 69),
534 CHV_GPP(75, 85),
535 };
536
537 static const struct intel_community southeast_communities[] = {
538 CHV_COMMUNITY(southeast_gpps, 16, 0x94),
539 };
540
541 static const struct intel_pinctrl_soc_data southeast_soc_data = {
542 .uid = "4",
543 .pins = southeast_pins,
544 .npins = ARRAY_SIZE(southeast_pins),
545 .groups = southeast_groups,
546 .ngroups = ARRAY_SIZE(southeast_groups),
547 .functions = southeast_functions,
548 .nfunctions = ARRAY_SIZE(southeast_functions),
549 .communities = southeast_communities,
550 .ncommunities = ARRAY_SIZE(southeast_communities),
551 };
552
553 static const struct intel_pinctrl_soc_data *chv_soc_data[] = {
554 &southwest_soc_data,
555 &north_soc_data,
556 &east_soc_data,
557 &southeast_soc_data,
558 NULL
559 };
560
561 /*
562 * Lock to serialize register accesses
563 *
564 * Due to a silicon issue, a shared lock must be used to prevent
565 * concurrent accesses across the 4 GPIO controllers.
566 *
567 * See Intel Atom Z8000 Processor Series Specification Update (Rev. 005),
568 * errata #CHT34, for further information.
569 */
570 static DEFINE_RAW_SPINLOCK(chv_lock);
571
572 static u32 chv_pctrl_readl(struct intel_pinctrl *pctrl, unsigned int offset)
573 {
574 const struct intel_community *community = &pctrl->communities[0];
575
576 return readl(community->regs + offset);
577 }
578
579 static void chv_pctrl_writel(struct intel_pinctrl *pctrl, unsigned int offset, u32 value)
580 {
581 const struct intel_community *community = &pctrl->communities[0];
582 void __iomem *reg = community->regs + offset;
583
584 /* Write and simple read back to confirm the bus transferring done */
585 writel(value, reg);
586 readl(reg);
587 }
588
589 static void __iomem *chv_padreg(struct intel_pinctrl *pctrl, unsigned int offset,
590 unsigned int reg)
591 {
592 const struct intel_community *community = &pctrl->communities[0];
593 unsigned int family_no = offset / MAX_FAMILY_PAD_GPIO_NO;
594 unsigned int pad_no = offset % MAX_FAMILY_PAD_GPIO_NO;
595
596 offset = FAMILY_PAD_REGS_SIZE * family_no + GPIO_REGS_SIZE * pad_no;
597
598 return community->pad_regs + offset + reg;
599 }
600
601 static u32 chv_readl(struct intel_pinctrl *pctrl, unsigned int pin, unsigned int offset)
602 {
603 return readl(chv_padreg(pctrl, pin, offset));
604 }
605
606 static void chv_writel(struct intel_pinctrl *pctrl, unsigned int pin, unsigned int offset, u32 value)
607 {
608 void __iomem *reg = chv_padreg(pctrl, pin, offset);
609
610 /* Write and simple read back to confirm the bus transferring done */
611 writel(value, reg);
612 readl(reg);
613 }
614
615 /* When Pad Cfg is locked, driver can only change GPIOTXState or GPIORXState */
616 static bool chv_pad_is_locked(u32 ctrl1)
617 {
618 return ctrl1 & CHV_PADCTRL1_CFGLOCK;
619 }
620
621 static bool chv_pad_locked(struct intel_pinctrl *pctrl, unsigned int offset)
622 {
623 return chv_pad_is_locked(chv_readl(pctrl, offset, CHV_PADCTRL1));
624 }
625
626 static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
627 unsigned int offset)
628 {
629 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
630 u32 ctrl0, ctrl1;
631
632 scoped_guard(raw_spinlock_irqsave, &chv_lock) {
633 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
634 ctrl1 = chv_readl(pctrl, offset, CHV_PADCTRL1);
635 }
636
637 if (ctrl0 & CHV_PADCTRL0_GPIOEN) {
638 seq_puts(s, "GPIO ");
639 } else {
640 u32 mode;
641
642 mode = ctrl0 & CHV_PADCTRL0_PMODE_MASK;
643 mode >>= CHV_PADCTRL0_PMODE_SHIFT;
644
645 seq_printf(s, "mode %d ", mode);
646 }
647
648 seq_printf(s, "0x%08x 0x%08x", ctrl0, ctrl1);
649
650 if (chv_pad_is_locked(ctrl1))
651 seq_puts(s, " [LOCKED]");
652 }
653
654 static const struct pinctrl_ops chv_pinctrl_ops = {
655 .get_groups_count = intel_get_groups_count,
656 .get_group_name = intel_get_group_name,
657 .get_group_pins = intel_get_group_pins,
658 .pin_dbg_show = chv_pin_dbg_show,
659 };
660
661 static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev,
662 unsigned int function, unsigned int group)
663 {
664 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
665 struct device *dev = pctrl->dev;
666 const struct intel_pingroup *grp;
667 int i;
668
669 grp = &pctrl->soc->groups[group];
670
671 guard(raw_spinlock_irqsave)(&chv_lock);
672
673 /* Check first that the pad is not locked */
674 for (i = 0; i < grp->grp.npins; i++) {
675 if (chv_pad_locked(pctrl, grp->grp.pins[i])) {
676 dev_warn(dev, "unable to set mode for locked pin %u\n", grp->grp.pins[i]);
677 return -EBUSY;
678 }
679 }
680
681 for (i = 0; i < grp->grp.npins; i++) {
682 int pin = grp->grp.pins[i];
683 unsigned int mode;
684 bool invert_oe;
685 u32 value;
686
687 /* Check if there is pin-specific config */
688 if (grp->modes)
689 mode = grp->modes[i];
690 else
691 mode = grp->mode;
692
693 /* Extract OE inversion */
694 invert_oe = mode & PINMODE_INVERT_OE;
695 mode &= ~PINMODE_INVERT_OE;
696
697 value = chv_readl(pctrl, pin, CHV_PADCTRL0);
698 /* Disable GPIO mode */
699 value &= ~CHV_PADCTRL0_GPIOEN;
700 /* Set to desired mode */
701 value &= ~CHV_PADCTRL0_PMODE_MASK;
702 value |= mode << CHV_PADCTRL0_PMODE_SHIFT;
703 chv_writel(pctrl, pin, CHV_PADCTRL0, value);
704
705 /* Update for invert_oe */
706 value = chv_readl(pctrl, pin, CHV_PADCTRL1) & ~CHV_PADCTRL1_INVRXTX_MASK;
707 if (invert_oe)
708 value |= CHV_PADCTRL1_INVRXTX_TXENABLE;
709 chv_writel(pctrl, pin, CHV_PADCTRL1, value);
710
711 dev_dbg(dev, "configured pin %u mode %u OE %sinverted\n", pin, mode,
712 invert_oe ? "" : "not ");
713 }
714
715 return 0;
716 }
717
718 static void chv_gpio_clear_triggering(struct intel_pinctrl *pctrl,
719 unsigned int offset)
720 {
721 u32 invrxtx_mask = CHV_PADCTRL1_INVRXTX_MASK;
722 u32 value;
723
724 /*
725 * One some devices the GPIO should output the inverted value from what
726 * device-drivers / ACPI code expects (inverted external buffer?). The
727 * BIOS makes this work by setting the CHV_PADCTRL1_INVRXTX_TXDATA flag,
728 * preserve this flag if the pin is already setup as GPIO.
729 */
730 value = chv_readl(pctrl, offset, CHV_PADCTRL0);
731 if (value & CHV_PADCTRL0_GPIOEN)
732 invrxtx_mask &= ~CHV_PADCTRL1_INVRXTX_TXDATA;
733
734 value = chv_readl(pctrl, offset, CHV_PADCTRL1);
735 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
736 value &= ~invrxtx_mask;
737 chv_writel(pctrl, offset, CHV_PADCTRL1, value);
738 }
739
740 static int chv_gpio_request_enable(struct pinctrl_dev *pctldev,
741 struct pinctrl_gpio_range *range,
742 unsigned int offset)
743 {
744 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
745 u32 value;
746
747 guard(raw_spinlock_irqsave)(&chv_lock);
748
749 if (chv_pad_locked(pctrl, offset)) {
750 value = chv_readl(pctrl, offset, CHV_PADCTRL0);
751 if (!(value & CHV_PADCTRL0_GPIOEN)) {
752 /* Locked so cannot enable */
753 return -EBUSY;
754 }
755 } else {
756 struct intel_community_context *cctx = &pctrl->context.communities[0];
757 int i;
758
759 /* Reset the interrupt mapping */
760 for (i = 0; i < ARRAY_SIZE(cctx->intr_lines); i++) {
761 if (cctx->intr_lines[i] == offset) {
762 cctx->intr_lines[i] = CHV_INVALID_HWIRQ;
763 break;
764 }
765 }
766
767 /* Disable interrupt generation */
768 chv_gpio_clear_triggering(pctrl, offset);
769
770 value = chv_readl(pctrl, offset, CHV_PADCTRL0);
771
772 /*
773 * If the pin is in HiZ mode (both TX and RX buffers are
774 * disabled) we turn it to be input now.
775 */
776 if ((value & CHV_PADCTRL0_GPIOCFG_MASK) ==
777 (CHV_PADCTRL0_GPIOCFG_HIZ << CHV_PADCTRL0_GPIOCFG_SHIFT)) {
778 value &= ~CHV_PADCTRL0_GPIOCFG_MASK;
779 value |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT;
780 }
781
782 /* Switch to a GPIO mode */
783 value |= CHV_PADCTRL0_GPIOEN;
784 chv_writel(pctrl, offset, CHV_PADCTRL0, value);
785 }
786
787 return 0;
788 }
789
790 static void chv_gpio_disable_free(struct pinctrl_dev *pctldev,
791 struct pinctrl_gpio_range *range,
792 unsigned int offset)
793 {
794 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
795
796 guard(raw_spinlock_irqsave)(&chv_lock);
797
798 if (chv_pad_locked(pctrl, offset))
799 return;
800
801 chv_gpio_clear_triggering(pctrl, offset);
802 }
803
804 static int chv_gpio_set_direction(struct pinctrl_dev *pctldev,
805 struct pinctrl_gpio_range *range,
806 unsigned int offset, bool input)
807 {
808 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
809 u32 ctrl0;
810
811 guard(raw_spinlock_irqsave)(&chv_lock);
812
813 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0) & ~CHV_PADCTRL0_GPIOCFG_MASK;
814 if (input)
815 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT;
816 else
817 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPO << CHV_PADCTRL0_GPIOCFG_SHIFT;
818 chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0);
819
820 return 0;
821 }
822
823 static const struct pinmux_ops chv_pinmux_ops = {
824 .get_functions_count = intel_get_functions_count,
825 .get_function_name = intel_get_function_name,
826 .get_function_groups = intel_get_function_groups,
827 .set_mux = chv_pinmux_set_mux,
828 .gpio_request_enable = chv_gpio_request_enable,
829 .gpio_disable_free = chv_gpio_disable_free,
830 .gpio_set_direction = chv_gpio_set_direction,
831 };
832
833 static int chv_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
834 unsigned long *config)
835 {
836 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
837 enum pin_config_param param = pinconf_to_config_param(*config);
838 u32 ctrl0, ctrl1;
839 u16 arg = 0;
840 u32 term;
841
842 scoped_guard(raw_spinlock_irqsave, &chv_lock) {
843 ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0);
844 ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1);
845 }
846
847 term = (ctrl0 & CHV_PADCTRL0_TERM_MASK) >> CHV_PADCTRL0_TERM_SHIFT;
848
849 switch (param) {
850 case PIN_CONFIG_BIAS_DISABLE:
851 if (term)
852 return -EINVAL;
853 break;
854
855 case PIN_CONFIG_BIAS_PULL_UP:
856 if (!(ctrl0 & CHV_PADCTRL0_TERM_UP))
857 return -EINVAL;
858
859 switch (term) {
860 case CHV_PADCTRL0_TERM_20K:
861 arg = 20000;
862 break;
863 case CHV_PADCTRL0_TERM_5K:
864 arg = 5000;
865 break;
866 case CHV_PADCTRL0_TERM_1K:
867 arg = 1000;
868 break;
869 }
870
871 break;
872
873 case PIN_CONFIG_BIAS_PULL_DOWN:
874 if (!term || (ctrl0 & CHV_PADCTRL0_TERM_UP))
875 return -EINVAL;
876
877 switch (term) {
878 case CHV_PADCTRL0_TERM_20K:
879 arg = 20000;
880 break;
881 case CHV_PADCTRL0_TERM_5K:
882 arg = 5000;
883 break;
884 }
885
886 break;
887
888 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: {
889 u32 cfg;
890
891 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
892 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
893 if (cfg != CHV_PADCTRL0_GPIOCFG_HIZ)
894 return -EINVAL;
895
896 break;
897 }
898
899 case PIN_CONFIG_DRIVE_PUSH_PULL:
900 if (ctrl1 & CHV_PADCTRL1_ODEN)
901 return -EINVAL;
902 break;
903
904 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
905 if (!(ctrl1 & CHV_PADCTRL1_ODEN))
906 return -EINVAL;
907 break;
908
909 default:
910 return -ENOTSUPP;
911 }
912
913 *config = pinconf_to_config_packed(param, arg);
914 return 0;
915 }
916
917 static int chv_config_set_pull(struct intel_pinctrl *pctrl, unsigned int pin,
918 enum pin_config_param param, u32 arg)
919 {
920 u32 ctrl0, pull;
921
922 guard(raw_spinlock_irqsave)(&chv_lock);
923
924 ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0);
925
926 switch (param) {
927 case PIN_CONFIG_BIAS_DISABLE:
928 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
929 break;
930
931 case PIN_CONFIG_BIAS_PULL_UP:
932 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
933
934 switch (arg) {
935 case 1000:
936 /* For 1k there is only pull up */
937 pull = CHV_PADCTRL0_TERM_1K << CHV_PADCTRL0_TERM_SHIFT;
938 break;
939 case 5000:
940 pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
941 break;
942 case 20000:
943 pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
944 break;
945 default:
946 return -EINVAL;
947 }
948
949 ctrl0 |= CHV_PADCTRL0_TERM_UP | pull;
950 break;
951
952 case PIN_CONFIG_BIAS_PULL_DOWN:
953 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
954
955 switch (arg) {
956 case 5000:
957 pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
958 break;
959 case 20000:
960 pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
961 break;
962 default:
963 return -EINVAL;
964 }
965
966 ctrl0 |= pull;
967 break;
968
969 default:
970 return -EINVAL;
971 }
972
973 chv_writel(pctrl, pin, CHV_PADCTRL0, ctrl0);
974
975 return 0;
976 }
977
978 static int chv_config_set_oden(struct intel_pinctrl *pctrl, unsigned int pin,
979 bool enable)
980 {
981 u32 ctrl1;
982
983 guard(raw_spinlock_irqsave)(&chv_lock);
984
985 ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1);
986
987 if (enable)
988 ctrl1 |= CHV_PADCTRL1_ODEN;
989 else
990 ctrl1 &= ~CHV_PADCTRL1_ODEN;
991
992 chv_writel(pctrl, pin, CHV_PADCTRL1, ctrl1);
993
994 return 0;
995 }
996
997 static int chv_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
998 unsigned long *configs, unsigned int nconfigs)
999 {
1000 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
1001 struct device *dev = pctrl->dev;
1002 enum pin_config_param param;
1003 int i, ret;
1004 u32 arg;
1005
1006 if (chv_pad_locked(pctrl, pin))
1007 return -EBUSY;
1008
1009 for (i = 0; i < nconfigs; i++) {
1010 param = pinconf_to_config_param(configs[i]);
1011 arg = pinconf_to_config_argument(configs[i]);
1012
1013 switch (param) {
1014 case PIN_CONFIG_BIAS_DISABLE:
1015 case PIN_CONFIG_BIAS_PULL_UP:
1016 case PIN_CONFIG_BIAS_PULL_DOWN:
1017 ret = chv_config_set_pull(pctrl, pin, param, arg);
1018 if (ret)
1019 return ret;
1020 break;
1021
1022 case PIN_CONFIG_DRIVE_PUSH_PULL:
1023 ret = chv_config_set_oden(pctrl, pin, false);
1024 if (ret)
1025 return ret;
1026 break;
1027
1028 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
1029 ret = chv_config_set_oden(pctrl, pin, true);
1030 if (ret)
1031 return ret;
1032 break;
1033
1034 default:
1035 return -ENOTSUPP;
1036 }
1037
1038 dev_dbg(dev, "pin %d set config %d arg %u\n", pin, param, arg);
1039 }
1040
1041 return 0;
1042 }
1043
1044 static int chv_config_group_get(struct pinctrl_dev *pctldev,
1045 unsigned int group,
1046 unsigned long *config)
1047 {
1048 const unsigned int *pins;
1049 unsigned int npins;
1050 int ret;
1051
1052 ret = intel_get_group_pins(pctldev, group, &pins, &npins);
1053 if (ret)
1054 return ret;
1055
1056 ret = chv_config_get(pctldev, pins[0], config);
1057 if (ret)
1058 return ret;
1059
1060 return 0;
1061 }
1062
1063 static int chv_config_group_set(struct pinctrl_dev *pctldev,
1064 unsigned int group, unsigned long *configs,
1065 unsigned int num_configs)
1066 {
1067 const unsigned int *pins;
1068 unsigned int npins;
1069 int i, ret;
1070
1071 ret = intel_get_group_pins(pctldev, group, &pins, &npins);
1072 if (ret)
1073 return ret;
1074
1075 for (i = 0; i < npins; i++) {
1076 ret = chv_config_set(pctldev, pins[i], configs, num_configs);
1077 if (ret)
1078 return ret;
1079 }
1080
1081 return 0;
1082 }
1083
1084 static const struct pinconf_ops chv_pinconf_ops = {
1085 .is_generic = true,
1086 .pin_config_set = chv_config_set,
1087 .pin_config_get = chv_config_get,
1088 .pin_config_group_get = chv_config_group_get,
1089 .pin_config_group_set = chv_config_group_set,
1090 };
1091
1092 static struct pinctrl_desc chv_pinctrl_desc = {
1093 .pctlops = &chv_pinctrl_ops,
1094 .pmxops = &chv_pinmux_ops,
1095 .confops = &chv_pinconf_ops,
1096 .owner = THIS_MODULE,
1097 };
1098
1099 static int chv_gpio_get(struct gpio_chip *chip, unsigned int offset)
1100 {
1101 struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1102 u32 ctrl0, cfg;
1103
1104 scoped_guard(raw_spinlock_irqsave, &chv_lock)
1105 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
1106
1107 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1108 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1109
1110 if (cfg == CHV_PADCTRL0_GPIOCFG_GPO)
1111 return !!(ctrl0 & CHV_PADCTRL0_GPIOTXSTATE);
1112 return !!(ctrl0 & CHV_PADCTRL0_GPIORXSTATE);
1113 }
1114
1115 static void chv_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
1116 {
1117 struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1118 u32 ctrl0;
1119
1120 guard(raw_spinlock_irqsave)(&chv_lock);
1121
1122 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
1123
1124 if (value)
1125 ctrl0 |= CHV_PADCTRL0_GPIOTXSTATE;
1126 else
1127 ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE;
1128
1129 chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0);
1130 }
1131
1132 static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
1133 {
1134 struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1135 u32 ctrl0, direction;
1136
1137 scoped_guard(raw_spinlock_irqsave, &chv_lock)
1138 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
1139
1140 direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1141 direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1142
1143 if (direction == CHV_PADCTRL0_GPIOCFG_GPO)
1144 return GPIO_LINE_DIRECTION_OUT;
1145
1146 return GPIO_LINE_DIRECTION_IN;
1147 }
1148
1149 static int chv_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
1150 {
1151 return pinctrl_gpio_direction_input(chip, offset);
1152 }
1153
1154 static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned int offset,
1155 int value)
1156 {
1157 chv_gpio_set(chip, offset, value);
1158 return pinctrl_gpio_direction_output(chip, offset);
1159 }
1160
1161 static const struct gpio_chip chv_gpio_chip = {
1162 .owner = THIS_MODULE,
1163 .request = gpiochip_generic_request,
1164 .free = gpiochip_generic_free,
1165 .get_direction = chv_gpio_get_direction,
1166 .direction_input = chv_gpio_direction_input,
1167 .direction_output = chv_gpio_direction_output,
1168 .get = chv_gpio_get,
1169 .set = chv_gpio_set,
1170 };
1171
1172 static void chv_gpio_irq_ack(struct irq_data *d)
1173 {
1174 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1175 struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1176 irq_hw_number_t hwirq = irqd_to_hwirq(d);
1177 u32 intr_line;
1178
1179 guard(raw_spinlock)(&chv_lock);
1180
1181 intr_line = chv_readl(pctrl, hwirq, CHV_PADCTRL0);
1182 intr_line &= CHV_PADCTRL0_INTSEL_MASK;
1183 intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
1184 chv_pctrl_writel(pctrl, CHV_INTSTAT, BIT(intr_line));
1185 }
1186
1187 static void chv_gpio_irq_mask_unmask(struct gpio_chip *gc, irq_hw_number_t hwirq, bool mask)
1188 {
1189 struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1190 u32 value, intr_line;
1191
1192 guard(raw_spinlock_irqsave)(&chv_lock);
1193
1194 intr_line = chv_readl(pctrl, hwirq, CHV_PADCTRL0);
1195 intr_line &= CHV_PADCTRL0_INTSEL_MASK;
1196 intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
1197
1198 value = chv_pctrl_readl(pctrl, CHV_INTMASK);
1199 if (mask)
1200 value &= ~BIT(intr_line);
1201 else
1202 value |= BIT(intr_line);
1203 chv_pctrl_writel(pctrl, CHV_INTMASK, value);
1204 }
1205
1206 static void chv_gpio_irq_mask(struct irq_data *d)
1207 {
1208 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1209 irq_hw_number_t hwirq = irqd_to_hwirq(d);
1210
1211 chv_gpio_irq_mask_unmask(gc, hwirq, true);
1212 gpiochip_disable_irq(gc, hwirq);
1213 }
1214
1215 static void chv_gpio_irq_unmask(struct irq_data *d)
1216 {
1217 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1218 irq_hw_number_t hwirq = irqd_to_hwirq(d);
1219
1220 gpiochip_enable_irq(gc, hwirq);
1221 chv_gpio_irq_mask_unmask(gc, hwirq, false);
1222 }
1223
1224 static unsigned chv_gpio_irq_startup(struct irq_data *d)
1225 {
1226 /*
1227 * Check if the interrupt has been requested with 0 as triggering
1228 * type. If not, bail out, ...
1229 */
1230 if (irqd_get_trigger_type(d) != IRQ_TYPE_NONE) {
1231 chv_gpio_irq_unmask(d);
1232 return 0;
1233 }
1234
1235 /*
1236 * ...otherwise it is assumed that the current values
1237 * programmed to the hardware are used (e.g BIOS configured
1238 * defaults).
1239 *
1240 * In that case ->irq_set_type() will never be called so we need to
1241 * read back the values from hardware now, set correct flow handler
1242 * and update mappings before the interrupt is being used.
1243 */
1244 scoped_guard(raw_spinlock_irqsave, &chv_lock) {
1245 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1246 struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1247 struct device *dev = pctrl->dev;
1248 struct intel_community_context *cctx = &pctrl->context.communities[0];
1249 irq_hw_number_t hwirq = irqd_to_hwirq(d);
1250 irq_flow_handler_t handler;
1251 u32 intsel, value;
1252
1253 intsel = chv_readl(pctrl, hwirq, CHV_PADCTRL0);
1254 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1255 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1256
1257 value = chv_readl(pctrl, hwirq, CHV_PADCTRL1);
1258 if (value & CHV_PADCTRL1_INTWAKECFG_LEVEL)
1259 handler = handle_level_irq;
1260 else
1261 handler = handle_edge_irq;
1262
1263 if (cctx->intr_lines[intsel] == CHV_INVALID_HWIRQ) {
1264 irq_set_handler_locked(d, handler);
1265 dev_dbg(dev, "using interrupt line %u for IRQ_TYPE_NONE on pin %lu\n",
1266 intsel, hwirq);
1267 cctx->intr_lines[intsel] = hwirq;
1268 }
1269 }
1270
1271 chv_gpio_irq_unmask(d);
1272 return 0;
1273 }
1274
1275 static int chv_gpio_set_intr_line(struct intel_pinctrl *pctrl, unsigned int pin)
1276 {
1277 struct device *dev = pctrl->dev;
1278 struct intel_community_context *cctx = &pctrl->context.communities[0];
1279 const struct intel_community *community = &pctrl->communities[0];
1280 u32 value, intsel;
1281 int i;
1282
1283 value = chv_readl(pctrl, pin, CHV_PADCTRL0);
1284 intsel = (value & CHV_PADCTRL0_INTSEL_MASK) >> CHV_PADCTRL0_INTSEL_SHIFT;
1285
1286 if (cctx->intr_lines[intsel] == pin)
1287 return 0;
1288
1289 if (cctx->intr_lines[intsel] == CHV_INVALID_HWIRQ) {
1290 dev_dbg(dev, "using interrupt line %u for pin %u\n", intsel, pin);
1291 cctx->intr_lines[intsel] = pin;
1292 return 0;
1293 }
1294
1295 /*
1296 * The interrupt line selected by the BIOS is already in use by
1297 * another pin, this is a known BIOS bug found on several models.
1298 * But this may also be caused by Linux deciding to use a pin as
1299 * IRQ which was not expected to be used as such by the BIOS authors,
1300 * so log this at info level only.
1301 */
1302 dev_info(dev, "interrupt line %u is used by both pin %u and pin %u\n", intsel,
1303 cctx->intr_lines[intsel], pin);
1304
1305 if (chv_pad_locked(pctrl, pin))
1306 return -EBUSY;
1307
1308 /*
1309 * The BIOS fills the interrupt lines from 0 counting up, start at
1310 * the other end to find a free interrupt line to workaround this.
1311 */
1312 for (i = community->nirqs - 1; i >= 0; i--) {
1313 if (cctx->intr_lines[i] == CHV_INVALID_HWIRQ)
1314 break;
1315 }
1316 if (i < 0)
1317 return -EBUSY;
1318
1319 dev_info(dev, "changing the interrupt line for pin %u to %d\n", pin, i);
1320
1321 value = (value & ~CHV_PADCTRL0_INTSEL_MASK) | (i << CHV_PADCTRL0_INTSEL_SHIFT);
1322 chv_writel(pctrl, pin, CHV_PADCTRL0, value);
1323 cctx->intr_lines[i] = pin;
1324
1325 return 0;
1326 }
1327
1328 static int chv_gpio_irq_type(struct irq_data *d, unsigned int type)
1329 {
1330 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1331 struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1332 irq_hw_number_t hwirq = irqd_to_hwirq(d);
1333 u32 value;
1334 int ret;
1335
1336 guard(raw_spinlock_irqsave)(&chv_lock);
1337
1338 ret = chv_gpio_set_intr_line(pctrl, hwirq);
1339 if (ret)
1340 return ret;
1341
1342 /*
1343 * Pins which can be used as shared interrupt are configured in
1344 * BIOS. Driver trusts BIOS configurations and assigns different
1345 * handler according to the irq type.
1346 *
1347 * Driver needs to save the mapping between each pin and
1348 * its interrupt line.
1349 * 1. If the pin cfg is locked in BIOS:
1350 * Trust BIOS has programmed IntWakeCfg bits correctly,
1351 * driver just needs to save the mapping.
1352 * 2. If the pin cfg is not locked in BIOS:
1353 * Driver programs the IntWakeCfg bits and save the mapping.
1354 */
1355 if (!chv_pad_locked(pctrl, hwirq)) {
1356 value = chv_readl(pctrl, hwirq, CHV_PADCTRL1);
1357 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
1358 value &= ~CHV_PADCTRL1_INVRXTX_MASK;
1359
1360 if (type & IRQ_TYPE_EDGE_BOTH) {
1361 if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
1362 value |= CHV_PADCTRL1_INTWAKECFG_BOTH;
1363 else if (type & IRQ_TYPE_EDGE_RISING)
1364 value |= CHV_PADCTRL1_INTWAKECFG_RISING;
1365 else if (type & IRQ_TYPE_EDGE_FALLING)
1366 value |= CHV_PADCTRL1_INTWAKECFG_FALLING;
1367 } else if (type & IRQ_TYPE_LEVEL_MASK) {
1368 value |= CHV_PADCTRL1_INTWAKECFG_LEVEL;
1369 if (type & IRQ_TYPE_LEVEL_LOW)
1370 value |= CHV_PADCTRL1_INVRXTX_RXDATA;
1371 }
1372
1373 chv_writel(pctrl, hwirq, CHV_PADCTRL1, value);
1374 }
1375
1376 if (type & IRQ_TYPE_EDGE_BOTH)
1377 irq_set_handler_locked(d, handle_edge_irq);
1378 else if (type & IRQ_TYPE_LEVEL_MASK)
1379 irq_set_handler_locked(d, handle_level_irq);
1380
1381 return 0;
1382 }
1383
1384 static const struct irq_chip chv_gpio_irq_chip = {
1385 .name = "chv-gpio",
1386 .irq_startup = chv_gpio_irq_startup,
1387 .irq_ack = chv_gpio_irq_ack,
1388 .irq_mask = chv_gpio_irq_mask,
1389 .irq_unmask = chv_gpio_irq_unmask,
1390 .irq_set_type = chv_gpio_irq_type,
1391 .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE,
1392 GPIOCHIP_IRQ_RESOURCE_HELPERS,
1393 };
1394
1395 static void chv_gpio_irq_handler(struct irq_desc *desc)
1396 {
1397 struct gpio_chip *gc = irq_desc_get_handler_data(desc);
1398 struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1399 struct device *dev = pctrl->dev;
1400 const struct intel_community *community = &pctrl->communities[0];
1401 struct intel_community_context *cctx = &pctrl->context.communities[0];
1402 struct irq_chip *chip = irq_desc_get_chip(desc);
1403 unsigned long pending;
1404 u32 intr_line;
1405
1406 chained_irq_enter(chip, desc);
1407
1408 scoped_guard(raw_spinlock_irqsave, &chv_lock)
1409 pending = chv_pctrl_readl(pctrl, CHV_INTSTAT);
1410
1411 for_each_set_bit(intr_line, &pending, community->nirqs) {
1412 unsigned int offset;
1413
1414 offset = cctx->intr_lines[intr_line];
1415 if (offset == CHV_INVALID_HWIRQ) {
1416 dev_warn_once(dev, "interrupt on unmapped interrupt line %u\n", intr_line);
1417 /* Some boards expect hwirq 0 to trigger in this case */
1418 offset = 0;
1419 }
1420
1421 generic_handle_domain_irq(gc->irq.domain, offset);
1422 }
1423
1424 chained_irq_exit(chip, desc);
1425 }
1426
1427 /*
1428 * Certain machines seem to hardcode Linux IRQ numbers in their ACPI
1429 * tables. Since we leave GPIOs that are not capable of generating
1430 * interrupts out of the irqdomain the numbering will be different and
1431 * cause devices using the hardcoded IRQ numbers fail. In order not to
1432 * break such machines we will only mask pins from irqdomain if the machine
1433 * is not listed below.
1434 */
1435 static const struct dmi_system_id chv_no_valid_mask[] = {
1436 /* See https://bugzilla.kernel.org/show_bug.cgi?id=194945 */
1437 {
1438 .ident = "Intel_Strago based Chromebooks (All models)",
1439 .matches = {
1440 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1441 DMI_MATCH(DMI_PRODUCT_FAMILY, "Intel_Strago"),
1442 },
1443 },
1444 {
1445 .ident = "HP Chromebook 11 G5 (Setzer)",
1446 .matches = {
1447 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
1448 DMI_MATCH(DMI_PRODUCT_NAME, "Setzer"),
1449 },
1450 },
1451 {
1452 .ident = "Acer Chromebook R11 (Cyan)",
1453 .matches = {
1454 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1455 DMI_MATCH(DMI_PRODUCT_NAME, "Cyan"),
1456 },
1457 },
1458 {
1459 .ident = "Samsung Chromebook 3 (Celes)",
1460 .matches = {
1461 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1462 DMI_MATCH(DMI_PRODUCT_NAME, "Celes"),
1463 },
1464 },
1465 {}
1466 };
1467
1468 static void chv_init_irq_valid_mask(struct gpio_chip *chip,
1469 unsigned long *valid_mask,
1470 unsigned int ngpios)
1471 {
1472 struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1473 const struct intel_community *community = &pctrl->communities[0];
1474 int i;
1475
1476 /* Do not add GPIOs that can only generate GPEs to the IRQ domain */
1477 for (i = 0; i < pctrl->soc->npins; i++) {
1478 const struct pinctrl_pin_desc *desc;
1479 u32 intsel;
1480
1481 desc = &pctrl->soc->pins[i];
1482
1483 intsel = chv_readl(pctrl, desc->number, CHV_PADCTRL0);
1484 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1485 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1486
1487 if (intsel >= community->nirqs)
1488 clear_bit(desc->number, valid_mask);
1489 }
1490 }
1491
1492 static int chv_gpio_irq_init_hw(struct gpio_chip *chip)
1493 {
1494 struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1495 const struct intel_community *community = &pctrl->communities[0];
1496
1497 /*
1498 * The same set of machines in chv_no_valid_mask[] have incorrectly
1499 * configured GPIOs that generate spurious interrupts so we use
1500 * this same list to apply another quirk for them.
1501 *
1502 * See also https://bugzilla.kernel.org/show_bug.cgi?id=197953.
1503 */
1504 if (!pctrl->chip.irq.init_valid_mask) {
1505 /*
1506 * Mask all interrupts the community is able to generate
1507 * but leave the ones that can only generate GPEs unmasked.
1508 */
1509 chv_pctrl_writel(pctrl, CHV_INTMASK, GENMASK(31, community->nirqs));
1510 }
1511
1512 /* Clear all interrupts */
1513 chv_pctrl_writel(pctrl, CHV_INTSTAT, 0xffff);
1514
1515 return 0;
1516 }
1517
1518 static int chv_gpio_add_pin_ranges(struct gpio_chip *chip)
1519 {
1520 struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1521 struct device *dev = pctrl->dev;
1522 const struct intel_community *community = &pctrl->communities[0];
1523 const struct intel_padgroup *gpp;
1524 int ret, i;
1525
1526 for (i = 0; i < community->ngpps; i++) {
1527 gpp = &community->gpps[i];
1528 ret = gpiochip_add_pin_range(chip, dev_name(dev), gpp->base, gpp->base, gpp->size);
1529 if (ret) {
1530 dev_err(dev, "failed to add GPIO pin range\n");
1531 return ret;
1532 }
1533 }
1534
1535 return 0;
1536 }
1537
1538 static int chv_gpio_probe(struct intel_pinctrl *pctrl, int irq)
1539 {
1540 const struct intel_community *community = &pctrl->communities[0];
1541 const struct intel_padgroup *gpp;
1542 struct gpio_chip *chip = &pctrl->chip;
1543 struct device *dev = pctrl->dev;
1544 bool need_valid_mask = !dmi_check_system(chv_no_valid_mask);
1545 int ret, i, irq_base;
1546
1547 *chip = chv_gpio_chip;
1548
1549 chip->ngpio = pctrl->soc->pins[pctrl->soc->npins - 1].number + 1;
1550 chip->label = dev_name(dev);
1551 chip->add_pin_ranges = chv_gpio_add_pin_ranges;
1552 chip->parent = dev;
1553 chip->base = -1;
1554
1555 pctrl->irq = irq;
1556
1557 gpio_irq_chip_set_chip(&chip->irq, &chv_gpio_irq_chip);
1558 chip->irq.init_hw = chv_gpio_irq_init_hw;
1559 chip->irq.parent_handler = chv_gpio_irq_handler;
1560 chip->irq.num_parents = 1;
1561 chip->irq.parents = &pctrl->irq;
1562 chip->irq.default_type = IRQ_TYPE_NONE;
1563 chip->irq.handler = handle_bad_irq;
1564 if (need_valid_mask) {
1565 chip->irq.init_valid_mask = chv_init_irq_valid_mask;
1566 } else {
1567 irq_base = devm_irq_alloc_descs(dev, -1, 0, pctrl->soc->npins, NUMA_NO_NODE);
1568 if (irq_base < 0) {
1569 dev_err(dev, "Failed to allocate IRQ numbers\n");
1570 return irq_base;
1571 }
1572 }
1573
1574 ret = devm_gpiochip_add_data(dev, chip, pctrl);
1575 if (ret) {
1576 dev_err(dev, "Failed to register gpiochip\n");
1577 return ret;
1578 }
1579
1580 if (!need_valid_mask) {
1581 for (i = 0; i < community->ngpps; i++) {
1582 gpp = &community->gpps[i];
1583
1584 irq_domain_associate_many(chip->irq.domain, irq_base,
1585 gpp->base, gpp->size);
1586 irq_base += gpp->size;
1587 }
1588 }
1589
1590 return 0;
1591 }
1592
1593 static acpi_status chv_pinctrl_mmio_access_handler(u32 function,
1594 acpi_physical_address address, u32 bits, u64 *value,
1595 void *handler_context, void *region_context)
1596 {
1597 struct intel_pinctrl *pctrl = region_context;
1598
1599 guard(raw_spinlock_irqsave)(&chv_lock);
1600
1601 if (function == ACPI_WRITE)
1602 chv_pctrl_writel(pctrl, address, *value);
1603 else if (function == ACPI_READ)
1604 *value = chv_pctrl_readl(pctrl, address);
1605 else
1606 return AE_BAD_PARAMETER;
1607
1608 return AE_OK;
1609 }
1610
1611 static int chv_pinctrl_probe(struct platform_device *pdev)
1612 {
1613 const struct intel_pinctrl_soc_data *soc_data;
1614 struct intel_community_context *cctx;
1615 struct intel_community *community;
1616 struct device *dev = &pdev->dev;
1617 struct intel_pinctrl *pctrl;
1618 acpi_status status;
1619 unsigned int i;
1620 int ret, irq;
1621
1622 soc_data = intel_pinctrl_get_soc_data(pdev);
1623 if (IS_ERR(soc_data))
1624 return PTR_ERR(soc_data);
1625
1626 pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL);
1627 if (!pctrl)
1628 return -ENOMEM;
1629
1630 pctrl->dev = dev;
1631 pctrl->soc = soc_data;
1632
1633 pctrl->ncommunities = pctrl->soc->ncommunities;
1634 pctrl->communities = devm_kmemdup(dev, pctrl->soc->communities,
1635 pctrl->ncommunities * sizeof(*pctrl->communities),
1636 GFP_KERNEL);
1637 if (!pctrl->communities)
1638 return -ENOMEM;
1639
1640 community = &pctrl->communities[0];
1641 community->regs = devm_platform_ioremap_resource(pdev, 0);
1642 if (IS_ERR(community->regs))
1643 return PTR_ERR(community->regs);
1644
1645 community->pad_regs = community->regs + FAMILY_PAD_REGS_OFF;
1646
1647 #ifdef CONFIG_PM_SLEEP
1648 pctrl->context.pads = devm_kcalloc(dev, pctrl->soc->npins,
1649 sizeof(*pctrl->context.pads),
1650 GFP_KERNEL);
1651 if (!pctrl->context.pads)
1652 return -ENOMEM;
1653 #endif
1654
1655 pctrl->context.communities = devm_kcalloc(dev, pctrl->soc->ncommunities,
1656 sizeof(*pctrl->context.communities),
1657 GFP_KERNEL);
1658 if (!pctrl->context.communities)
1659 return -ENOMEM;
1660
1661 cctx = &pctrl->context.communities[0];
1662 for (i = 0; i < ARRAY_SIZE(cctx->intr_lines); i++)
1663 cctx->intr_lines[i] = CHV_INVALID_HWIRQ;
1664
1665 irq = platform_get_irq(pdev, 0);
1666 if (irq < 0)
1667 return irq;
1668
1669 pctrl->pctldesc = chv_pinctrl_desc;
1670 pctrl->pctldesc.name = dev_name(dev);
1671 pctrl->pctldesc.pins = pctrl->soc->pins;
1672 pctrl->pctldesc.npins = pctrl->soc->npins;
1673
1674 pctrl->pctldev = devm_pinctrl_register(dev, &pctrl->pctldesc, pctrl);
1675 if (IS_ERR(pctrl->pctldev)) {
1676 dev_err(dev, "failed to register pinctrl driver\n");
1677 return PTR_ERR(pctrl->pctldev);
1678 }
1679
1680 ret = chv_gpio_probe(pctrl, irq);
1681 if (ret)
1682 return ret;
1683
1684 status = acpi_install_address_space_handler(ACPI_HANDLE(dev),
1685 community->acpi_space_id,
1686 chv_pinctrl_mmio_access_handler,
1687 NULL, pctrl);
1688 if (ACPI_FAILURE(status))
1689 dev_err(dev, "failed to install ACPI addr space handler\n");
1690
1691 platform_set_drvdata(pdev, pctrl);
1692
1693 return 0;
1694 }
1695
1696 static void chv_pinctrl_remove(struct platform_device *pdev)
1697 {
1698 struct intel_pinctrl *pctrl = platform_get_drvdata(pdev);
1699 const struct intel_community *community = &pctrl->communities[0];
1700
1701 acpi_remove_address_space_handler(ACPI_HANDLE(&pdev->dev),
1702 community->acpi_space_id,
1703 chv_pinctrl_mmio_access_handler);
1704 }
1705
1706 static int chv_pinctrl_suspend_noirq(struct device *dev)
1707 {
1708 struct intel_pinctrl *pctrl = dev_get_drvdata(dev);
1709 struct intel_community_context *cctx = &pctrl->context.communities[0];
1710 int i;
1711
1712 guard(raw_spinlock_irqsave)(&chv_lock);
1713
1714 cctx->saved_intmask = chv_pctrl_readl(pctrl, CHV_INTMASK);
1715
1716 for (i = 0; i < pctrl->soc->npins; i++) {
1717 const struct pinctrl_pin_desc *desc;
1718 struct intel_pad_context *ctx = &pctrl->context.pads[i];
1719
1720 desc = &pctrl->soc->pins[i];
1721 if (chv_pad_locked(pctrl, desc->number))
1722 continue;
1723
1724 ctx->padctrl0 = chv_readl(pctrl, desc->number, CHV_PADCTRL0);
1725 ctx->padctrl0 &= ~CHV_PADCTRL0_GPIORXSTATE;
1726
1727 ctx->padctrl1 = chv_readl(pctrl, desc->number, CHV_PADCTRL1);
1728 }
1729
1730 return 0;
1731 }
1732
1733 static int chv_pinctrl_resume_noirq(struct device *dev)
1734 {
1735 struct intel_pinctrl *pctrl = dev_get_drvdata(dev);
1736 struct intel_community_context *cctx = &pctrl->context.communities[0];
1737 int i;
1738
1739 guard(raw_spinlock_irqsave)(&chv_lock);
1740
1741 /*
1742 * Mask all interrupts before restoring per-pin configuration
1743 * registers because we don't know in which state BIOS left them
1744 * upon exiting suspend.
1745 */
1746 chv_pctrl_writel(pctrl, CHV_INTMASK, 0x0000);
1747
1748 for (i = 0; i < pctrl->soc->npins; i++) {
1749 const struct pinctrl_pin_desc *desc;
1750 struct intel_pad_context *ctx = &pctrl->context.pads[i];
1751 u32 val;
1752
1753 desc = &pctrl->soc->pins[i];
1754 if (chv_pad_locked(pctrl, desc->number))
1755 continue;
1756
1757 /* Only restore if our saved state differs from the current */
1758 val = chv_readl(pctrl, desc->number, CHV_PADCTRL0);
1759 val &= ~CHV_PADCTRL0_GPIORXSTATE;
1760 if (ctx->padctrl0 != val) {
1761 chv_writel(pctrl, desc->number, CHV_PADCTRL0, ctx->padctrl0);
1762 dev_dbg(dev, "restored pin %2u ctrl0 0x%08x\n", desc->number,
1763 chv_readl(pctrl, desc->number, CHV_PADCTRL0));
1764 }
1765
1766 val = chv_readl(pctrl, desc->number, CHV_PADCTRL1);
1767 if (ctx->padctrl1 != val) {
1768 chv_writel(pctrl, desc->number, CHV_PADCTRL1, ctx->padctrl1);
1769 dev_dbg(dev, "restored pin %2u ctrl1 0x%08x\n", desc->number,
1770 chv_readl(pctrl, desc->number, CHV_PADCTRL1));
1771 }
1772 }
1773
1774 /*
1775 * Now that all pins are restored to known state, we can restore
1776 * the interrupt mask register as well.
1777 */
1778 chv_pctrl_writel(pctrl, CHV_INTSTAT, 0xffff);
1779 chv_pctrl_writel(pctrl, CHV_INTMASK, cctx->saved_intmask);
1780
1781 return 0;
1782 }
1783
1784 static DEFINE_NOIRQ_DEV_PM_OPS(chv_pinctrl_pm_ops,
1785 chv_pinctrl_suspend_noirq, chv_pinctrl_resume_noirq);
1786
1787 static const struct acpi_device_id chv_pinctrl_acpi_match[] = {
1788 { "INT33FF", (kernel_ulong_t)chv_soc_data },
1789 { }
1790 };
1791 MODULE_DEVICE_TABLE(acpi, chv_pinctrl_acpi_match);
1792
1793 static struct platform_driver chv_pinctrl_driver = {
1794 .probe = chv_pinctrl_probe,
1795 .remove = chv_pinctrl_remove,
1796 .driver = {
1797 .name = "cherryview-pinctrl",
1798 .pm = pm_sleep_ptr(&chv_pinctrl_pm_ops),
1799 .acpi_match_table = chv_pinctrl_acpi_match,
1800 },
1801 };
1802
1803 static int __init chv_pinctrl_init(void)
1804 {
1805 return platform_driver_register(&chv_pinctrl_driver);
1806 }
1807 subsys_initcall(chv_pinctrl_init);
1808
1809 static void __exit chv_pinctrl_exit(void)
1810 {
1811 platform_driver_unregister(&chv_pinctrl_driver);
1812 }
1813 module_exit(chv_pinctrl_exit);
1814
1815 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
1816 MODULE_DESCRIPTION("Intel Cherryview/Braswell pinctrl driver");
1817 MODULE_LICENSE("GPL v2");
1818 MODULE_IMPORT_NS("PINCTRL_INTEL");
Linux Kernel