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[mirror_ubuntu-artful-kernel.git] / drivers / pinctrl / intel / pinctrl-baytrail.c
1 /*
2 * Pinctrl GPIO driver for Intel Baytrail
3 * Copyright (c) 2012-2013, Intel Corporation.
4 *
5 * Author: Mathias Nyman <mathias.nyman@linux.intel.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2, as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 */
16
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/types.h>
20 #include <linux/bitops.h>
21 #include <linux/interrupt.h>
22 #include <linux/gpio.h>
23 #include <linux/gpio/driver.h>
24 #include <linux/acpi.h>
25 #include <linux/platform_device.h>
26 #include <linux/seq_file.h>
27 #include <linux/io.h>
28 #include <linux/pm_runtime.h>
29 #include <linux/pinctrl/pinctrl.h>
30 #include <linux/pinctrl/pinmux.h>
31 #include <linux/pinctrl/pinconf.h>
32 #include <linux/pinctrl/pinconf-generic.h>
33
34 /* memory mapped register offsets */
35 #define BYT_CONF0_REG 0x000
36 #define BYT_CONF1_REG 0x004
37 #define BYT_VAL_REG 0x008
38 #define BYT_DFT_REG 0x00c
39 #define BYT_INT_STAT_REG 0x800
40 #define BYT_DEBOUNCE_REG 0x9d0
41
42 /* BYT_CONF0_REG register bits */
43 #define BYT_IODEN BIT(31)
44 #define BYT_DIRECT_IRQ_EN BIT(27)
45 #define BYT_TRIG_NEG BIT(26)
46 #define BYT_TRIG_POS BIT(25)
47 #define BYT_TRIG_LVL BIT(24)
48 #define BYT_DEBOUNCE_EN BIT(20)
49 #define BYT_PULL_STR_SHIFT 9
50 #define BYT_PULL_STR_MASK (3 << BYT_PULL_STR_SHIFT)
51 #define BYT_PULL_STR_2K (0 << BYT_PULL_STR_SHIFT)
52 #define BYT_PULL_STR_10K (1 << BYT_PULL_STR_SHIFT)
53 #define BYT_PULL_STR_20K (2 << BYT_PULL_STR_SHIFT)
54 #define BYT_PULL_STR_40K (3 << BYT_PULL_STR_SHIFT)
55 #define BYT_PULL_ASSIGN_SHIFT 7
56 #define BYT_PULL_ASSIGN_MASK (3 << BYT_PULL_ASSIGN_SHIFT)
57 #define BYT_PULL_ASSIGN_UP (1 << BYT_PULL_ASSIGN_SHIFT)
58 #define BYT_PULL_ASSIGN_DOWN (2 << BYT_PULL_ASSIGN_SHIFT)
59 #define BYT_PIN_MUX 0x07
60
61 /* BYT_VAL_REG register bits */
62 #define BYT_INPUT_EN BIT(2) /* 0: input enabled (active low)*/
63 #define BYT_OUTPUT_EN BIT(1) /* 0: output enabled (active low)*/
64 #define BYT_LEVEL BIT(0)
65
66 #define BYT_DIR_MASK (BIT(1) | BIT(2))
67 #define BYT_TRIG_MASK (BIT(26) | BIT(25) | BIT(24))
68
69 #define BYT_CONF0_RESTORE_MASK (BYT_DIRECT_IRQ_EN | BYT_TRIG_MASK | \
70 BYT_PIN_MUX)
71 #define BYT_VAL_RESTORE_MASK (BYT_DIR_MASK | BYT_LEVEL)
72
73 /* BYT_DEBOUNCE_REG bits */
74 #define BYT_DEBOUNCE_PULSE_MASK 0x7
75 #define BYT_DEBOUNCE_PULSE_375US 1
76 #define BYT_DEBOUNCE_PULSE_750US 2
77 #define BYT_DEBOUNCE_PULSE_1500US 3
78 #define BYT_DEBOUNCE_PULSE_3MS 4
79 #define BYT_DEBOUNCE_PULSE_6MS 5
80 #define BYT_DEBOUNCE_PULSE_12MS 6
81 #define BYT_DEBOUNCE_PULSE_24MS 7
82
83 #define BYT_NGPIO_SCORE 102
84 #define BYT_NGPIO_NCORE 28
85 #define BYT_NGPIO_SUS 44
86
87 #define BYT_SCORE_ACPI_UID "1"
88 #define BYT_NCORE_ACPI_UID "2"
89 #define BYT_SUS_ACPI_UID "3"
90
91 /*
92 * This is the function value most pins have for GPIO muxing. If the value
93 * differs from the default one, it must be explicitly mentioned. Otherwise, the
94 * pin control implementation will set the muxing value to default GPIO if it
95 * does not find a match for the requested function.
96 */
97 #define BYT_DEFAULT_GPIO_MUX 0
98
99 struct byt_gpio_pin_context {
100 u32 conf0;
101 u32 val;
102 };
103
104 struct byt_simple_func_mux {
105 const char *name;
106 unsigned short func;
107 };
108
109 struct byt_mixed_func_mux {
110 const char *name;
111 const unsigned short *func_values;
112 };
113
114 struct byt_pingroup {
115 const char *name;
116 const unsigned int *pins;
117 size_t npins;
118 unsigned short has_simple_funcs;
119 union {
120 const struct byt_simple_func_mux *simple_funcs;
121 const struct byt_mixed_func_mux *mixed_funcs;
122 };
123 size_t nfuncs;
124 };
125
126 struct byt_function {
127 const char *name;
128 const char * const *groups;
129 size_t ngroups;
130 };
131
132 struct byt_community {
133 unsigned int pin_base;
134 size_t npins;
135 const unsigned int *pad_map;
136 void __iomem *reg_base;
137 };
138
139 #define SIMPLE_FUNC(n, f) \
140 { \
141 .name = (n), \
142 .func = (f), \
143 }
144 #define MIXED_FUNC(n, f) \
145 { \
146 .name = (n), \
147 .func_values = (f), \
148 }
149
150 #define PIN_GROUP_SIMPLE(n, p, f) \
151 { \
152 .name = (n), \
153 .pins = (p), \
154 .npins = ARRAY_SIZE((p)), \
155 .has_simple_funcs = 1, \
156 { \
157 .simple_funcs = (f), \
158 }, \
159 .nfuncs = ARRAY_SIZE((f)), \
160 }
161 #define PIN_GROUP_MIXED(n, p, f) \
162 { \
163 .name = (n), \
164 .pins = (p), \
165 .npins = ARRAY_SIZE((p)), \
166 .has_simple_funcs = 0, \
167 { \
168 .mixed_funcs = (f), \
169 }, \
170 .nfuncs = ARRAY_SIZE((f)), \
171 }
172
173 #define FUNCTION(n, g) \
174 { \
175 .name = (n), \
176 .groups = (g), \
177 .ngroups = ARRAY_SIZE((g)), \
178 }
179
180 #define COMMUNITY(p, n, map) \
181 { \
182 .pin_base = (p), \
183 .npins = (n), \
184 .pad_map = (map),\
185 }
186
187 struct byt_pinctrl_soc_data {
188 const char *uid;
189 const struct pinctrl_pin_desc *pins;
190 size_t npins;
191 const struct byt_pingroup *groups;
192 size_t ngroups;
193 const struct byt_function *functions;
194 size_t nfunctions;
195 const struct byt_community *communities;
196 size_t ncommunities;
197 };
198
199 struct byt_gpio {
200 struct gpio_chip chip;
201 struct platform_device *pdev;
202 struct pinctrl_dev *pctl_dev;
203 struct pinctrl_desc pctl_desc;
204 raw_spinlock_t lock;
205 const struct byt_pinctrl_soc_data *soc_data;
206 struct byt_community *communities_copy;
207 struct byt_gpio_pin_context *saved_context;
208 };
209
210 /* SCORE pins, aka GPIOC_<pin_no> or GPIO_S0_SC[<pin_no>] */
211 static const struct pinctrl_pin_desc byt_score_pins[] = {
212 PINCTRL_PIN(0, "SATA_GP0"),
213 PINCTRL_PIN(1, "SATA_GP1"),
214 PINCTRL_PIN(2, "SATA_LED#"),
215 PINCTRL_PIN(3, "PCIE_CLKREQ0"),
216 PINCTRL_PIN(4, "PCIE_CLKREQ1"),
217 PINCTRL_PIN(5, "PCIE_CLKREQ2"),
218 PINCTRL_PIN(6, "PCIE_CLKREQ3"),
219 PINCTRL_PIN(7, "SD3_WP"),
220 PINCTRL_PIN(8, "HDA_RST"),
221 PINCTRL_PIN(9, "HDA_SYNC"),
222 PINCTRL_PIN(10, "HDA_CLK"),
223 PINCTRL_PIN(11, "HDA_SDO"),
224 PINCTRL_PIN(12, "HDA_SDI0"),
225 PINCTRL_PIN(13, "HDA_SDI1"),
226 PINCTRL_PIN(14, "GPIO_S0_SC14"),
227 PINCTRL_PIN(15, "GPIO_S0_SC15"),
228 PINCTRL_PIN(16, "MMC1_CLK"),
229 PINCTRL_PIN(17, "MMC1_D0"),
230 PINCTRL_PIN(18, "MMC1_D1"),
231 PINCTRL_PIN(19, "MMC1_D2"),
232 PINCTRL_PIN(20, "MMC1_D3"),
233 PINCTRL_PIN(21, "MMC1_D4"),
234 PINCTRL_PIN(22, "MMC1_D5"),
235 PINCTRL_PIN(23, "MMC1_D6"),
236 PINCTRL_PIN(24, "MMC1_D7"),
237 PINCTRL_PIN(25, "MMC1_CMD"),
238 PINCTRL_PIN(26, "MMC1_RST"),
239 PINCTRL_PIN(27, "SD2_CLK"),
240 PINCTRL_PIN(28, "SD2_D0"),
241 PINCTRL_PIN(29, "SD2_D1"),
242 PINCTRL_PIN(30, "SD2_D2"),
243 PINCTRL_PIN(31, "SD2_D3_CD"),
244 PINCTRL_PIN(32, "SD2_CMD"),
245 PINCTRL_PIN(33, "SD3_CLK"),
246 PINCTRL_PIN(34, "SD3_D0"),
247 PINCTRL_PIN(35, "SD3_D1"),
248 PINCTRL_PIN(36, "SD3_D2"),
249 PINCTRL_PIN(37, "SD3_D3"),
250 PINCTRL_PIN(38, "SD3_CD"),
251 PINCTRL_PIN(39, "SD3_CMD"),
252 PINCTRL_PIN(40, "SD3_1P8EN"),
253 PINCTRL_PIN(41, "SD3_PWREN#"),
254 PINCTRL_PIN(42, "ILB_LPC_AD0"),
255 PINCTRL_PIN(43, "ILB_LPC_AD1"),
256 PINCTRL_PIN(44, "ILB_LPC_AD2"),
257 PINCTRL_PIN(45, "ILB_LPC_AD3"),
258 PINCTRL_PIN(46, "ILB_LPC_FRAME"),
259 PINCTRL_PIN(47, "ILB_LPC_CLK0"),
260 PINCTRL_PIN(48, "ILB_LPC_CLK1"),
261 PINCTRL_PIN(49, "ILB_LPC_CLKRUN"),
262 PINCTRL_PIN(50, "ILB_LPC_SERIRQ"),
263 PINCTRL_PIN(51, "PCU_SMB_DATA"),
264 PINCTRL_PIN(52, "PCU_SMB_CLK"),
265 PINCTRL_PIN(53, "PCU_SMB_ALERT"),
266 PINCTRL_PIN(54, "ILB_8254_SPKR"),
267 PINCTRL_PIN(55, "GPIO_S0_SC55"),
268 PINCTRL_PIN(56, "GPIO_S0_SC56"),
269 PINCTRL_PIN(57, "GPIO_S0_SC57"),
270 PINCTRL_PIN(58, "GPIO_S0_SC58"),
271 PINCTRL_PIN(59, "GPIO_S0_SC59"),
272 PINCTRL_PIN(60, "GPIO_S0_SC60"),
273 PINCTRL_PIN(61, "GPIO_S0_SC61"),
274 PINCTRL_PIN(62, "LPE_I2S2_CLK"),
275 PINCTRL_PIN(63, "LPE_I2S2_FRM"),
276 PINCTRL_PIN(64, "LPE_I2S2_DATAIN"),
277 PINCTRL_PIN(65, "LPE_I2S2_DATAOUT"),
278 PINCTRL_PIN(66, "SIO_SPI_CS"),
279 PINCTRL_PIN(67, "SIO_SPI_MISO"),
280 PINCTRL_PIN(68, "SIO_SPI_MOSI"),
281 PINCTRL_PIN(69, "SIO_SPI_CLK"),
282 PINCTRL_PIN(70, "SIO_UART1_RXD"),
283 PINCTRL_PIN(71, "SIO_UART1_TXD"),
284 PINCTRL_PIN(72, "SIO_UART1_RTS"),
285 PINCTRL_PIN(73, "SIO_UART1_CTS"),
286 PINCTRL_PIN(74, "SIO_UART2_RXD"),
287 PINCTRL_PIN(75, "SIO_UART2_TXD"),
288 PINCTRL_PIN(76, "SIO_UART2_RTS"),
289 PINCTRL_PIN(77, "SIO_UART2_CTS"),
290 PINCTRL_PIN(78, "SIO_I2C0_DATA"),
291 PINCTRL_PIN(79, "SIO_I2C0_CLK"),
292 PINCTRL_PIN(80, "SIO_I2C1_DATA"),
293 PINCTRL_PIN(81, "SIO_I2C1_CLK"),
294 PINCTRL_PIN(82, "SIO_I2C2_DATA"),
295 PINCTRL_PIN(83, "SIO_I2C2_CLK"),
296 PINCTRL_PIN(84, "SIO_I2C3_DATA"),
297 PINCTRL_PIN(85, "SIO_I2C3_CLK"),
298 PINCTRL_PIN(86, "SIO_I2C4_DATA"),
299 PINCTRL_PIN(87, "SIO_I2C4_CLK"),
300 PINCTRL_PIN(88, "SIO_I2C5_DATA"),
301 PINCTRL_PIN(89, "SIO_I2C5_CLK"),
302 PINCTRL_PIN(90, "SIO_I2C6_DATA"),
303 PINCTRL_PIN(91, "SIO_I2C6_CLK"),
304 PINCTRL_PIN(92, "GPIO_S0_SC92"),
305 PINCTRL_PIN(93, "GPIO_S0_SC93"),
306 PINCTRL_PIN(94, "SIO_PWM0"),
307 PINCTRL_PIN(95, "SIO_PWM1"),
308 PINCTRL_PIN(96, "PMC_PLT_CLK0"),
309 PINCTRL_PIN(97, "PMC_PLT_CLK1"),
310 PINCTRL_PIN(98, "PMC_PLT_CLK2"),
311 PINCTRL_PIN(99, "PMC_PLT_CLK3"),
312 PINCTRL_PIN(100, "PMC_PLT_CLK4"),
313 PINCTRL_PIN(101, "PMC_PLT_CLK5"),
314 };
315
316 static const unsigned int byt_score_pins_map[BYT_NGPIO_SCORE] = {
317 85, 89, 93, 96, 99, 102, 98, 101, 34, 37,
318 36, 38, 39, 35, 40, 84, 62, 61, 64, 59,
319 54, 56, 60, 55, 63, 57, 51, 50, 53, 47,
320 52, 49, 48, 43, 46, 41, 45, 42, 58, 44,
321 95, 105, 70, 68, 67, 66, 69, 71, 65, 72,
322 86, 90, 88, 92, 103, 77, 79, 83, 78, 81,
323 80, 82, 13, 12, 15, 14, 17, 18, 19, 16,
324 2, 1, 0, 4, 6, 7, 9, 8, 33, 32,
325 31, 30, 29, 27, 25, 28, 26, 23, 21, 20,
326 24, 22, 5, 3, 10, 11, 106, 87, 91, 104,
327 97, 100,
328 };
329
330 /* SCORE groups */
331 static const unsigned int byt_score_uart1_pins[] = { 70, 71, 72, 73 };
332 static const unsigned int byt_score_uart2_pins[] = { 74, 75, 76, 77 };
333 static const struct byt_simple_func_mux byt_score_uart_mux[] = {
334 SIMPLE_FUNC("uart", 1),
335 };
336
337 static const unsigned int byt_score_pwm0_pins[] = { 94 };
338 static const unsigned int byt_score_pwm1_pins[] = { 95 };
339 static const struct byt_simple_func_mux byt_score_pwm_mux[] = {
340 SIMPLE_FUNC("pwm", 1),
341 };
342
343 static const unsigned int byt_score_sio_spi_pins[] = { 66, 67, 68, 69 };
344 static const struct byt_simple_func_mux byt_score_spi_mux[] = {
345 SIMPLE_FUNC("spi", 1),
346 };
347
348 static const unsigned int byt_score_i2c5_pins[] = { 88, 89 };
349 static const unsigned int byt_score_i2c6_pins[] = { 90, 91 };
350 static const unsigned int byt_score_i2c4_pins[] = { 86, 87 };
351 static const unsigned int byt_score_i2c3_pins[] = { 84, 85 };
352 static const unsigned int byt_score_i2c2_pins[] = { 82, 83 };
353 static const unsigned int byt_score_i2c1_pins[] = { 80, 81 };
354 static const unsigned int byt_score_i2c0_pins[] = { 78, 79 };
355 static const struct byt_simple_func_mux byt_score_i2c_mux[] = {
356 SIMPLE_FUNC("i2c", 1),
357 };
358
359 static const unsigned int byt_score_ssp0_pins[] = { 8, 9, 10, 11 };
360 static const unsigned int byt_score_ssp1_pins[] = { 12, 13, 14, 15 };
361 static const unsigned int byt_score_ssp2_pins[] = { 62, 63, 64, 65 };
362 static const struct byt_simple_func_mux byt_score_ssp_mux[] = {
363 SIMPLE_FUNC("ssp", 1),
364 };
365
366 static const unsigned int byt_score_sdcard_pins[] = {
367 7, 33, 34, 35, 36, 37, 38, 39, 40, 41,
368 };
369 static const unsigned short byt_score_sdcard_mux_values[] = {
370 2, 1, 1, 1, 1, 1, 1, 1, 1, 1,
371 };
372 static const struct byt_mixed_func_mux byt_score_sdcard_mux[] = {
373 MIXED_FUNC("sdcard", byt_score_sdcard_mux_values),
374 };
375
376 static const unsigned int byt_score_sdio_pins[] = { 27, 28, 29, 30, 31, 32 };
377 static const struct byt_simple_func_mux byt_score_sdio_mux[] = {
378 SIMPLE_FUNC("sdio", 1),
379 };
380
381 static const unsigned int byt_score_emmc_pins[] = {
382 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
383 };
384 static const struct byt_simple_func_mux byt_score_emmc_mux[] = {
385 SIMPLE_FUNC("emmc", 1),
386 };
387
388 static const unsigned int byt_score_ilb_lpc_pins[] = {
389 42, 43, 44, 45, 46, 47, 48, 49, 50,
390 };
391 static const struct byt_simple_func_mux byt_score_lpc_mux[] = {
392 SIMPLE_FUNC("lpc", 1),
393 };
394
395 static const unsigned int byt_score_sata_pins[] = { 0, 1, 2 };
396 static const struct byt_simple_func_mux byt_score_sata_mux[] = {
397 SIMPLE_FUNC("sata", 1),
398 };
399
400 static const unsigned int byt_score_plt_clk0_pins[] = { 96 };
401 static const unsigned int byt_score_plt_clk1_pins[] = { 97 };
402 static const unsigned int byt_score_plt_clk2_pins[] = { 98 };
403 static const unsigned int byt_score_plt_clk3_pins[] = { 99 };
404 static const unsigned int byt_score_plt_clk4_pins[] = { 100 };
405 static const unsigned int byt_score_plt_clk5_pins[] = { 101 };
406 static const struct byt_simple_func_mux byt_score_plt_clk_mux[] = {
407 SIMPLE_FUNC("plt_clk", 1),
408 };
409
410 static const unsigned int byt_score_smbus_pins[] = { 51, 52, 53 };
411 static const struct byt_simple_func_mux byt_score_smbus_mux[] = {
412 SIMPLE_FUNC("smbus", 1),
413 };
414
415 static const struct byt_pingroup byt_score_groups[] = {
416 PIN_GROUP_SIMPLE("uart1_grp",
417 byt_score_uart1_pins, byt_score_uart_mux),
418 PIN_GROUP_SIMPLE("uart2_grp",
419 byt_score_uart2_pins, byt_score_uart_mux),
420 PIN_GROUP_SIMPLE("pwm0_grp",
421 byt_score_pwm0_pins, byt_score_pwm_mux),
422 PIN_GROUP_SIMPLE("pwm1_grp",
423 byt_score_pwm1_pins, byt_score_pwm_mux),
424 PIN_GROUP_SIMPLE("ssp2_grp",
425 byt_score_ssp2_pins, byt_score_pwm_mux),
426 PIN_GROUP_SIMPLE("sio_spi_grp",
427 byt_score_sio_spi_pins, byt_score_spi_mux),
428 PIN_GROUP_SIMPLE("i2c5_grp",
429 byt_score_i2c5_pins, byt_score_i2c_mux),
430 PIN_GROUP_SIMPLE("i2c6_grp",
431 byt_score_i2c6_pins, byt_score_i2c_mux),
432 PIN_GROUP_SIMPLE("i2c4_grp",
433 byt_score_i2c4_pins, byt_score_i2c_mux),
434 PIN_GROUP_SIMPLE("i2c3_grp",
435 byt_score_i2c3_pins, byt_score_i2c_mux),
436 PIN_GROUP_SIMPLE("i2c2_grp",
437 byt_score_i2c2_pins, byt_score_i2c_mux),
438 PIN_GROUP_SIMPLE("i2c1_grp",
439 byt_score_i2c1_pins, byt_score_i2c_mux),
440 PIN_GROUP_SIMPLE("i2c0_grp",
441 byt_score_i2c0_pins, byt_score_i2c_mux),
442 PIN_GROUP_SIMPLE("ssp0_grp",
443 byt_score_ssp0_pins, byt_score_ssp_mux),
444 PIN_GROUP_SIMPLE("ssp1_grp",
445 byt_score_ssp1_pins, byt_score_ssp_mux),
446 PIN_GROUP_MIXED("sdcard_grp",
447 byt_score_sdcard_pins, byt_score_sdcard_mux),
448 PIN_GROUP_SIMPLE("sdio_grp",
449 byt_score_sdio_pins, byt_score_sdio_mux),
450 PIN_GROUP_SIMPLE("emmc_grp",
451 byt_score_emmc_pins, byt_score_emmc_mux),
452 PIN_GROUP_SIMPLE("lpc_grp",
453 byt_score_ilb_lpc_pins, byt_score_lpc_mux),
454 PIN_GROUP_SIMPLE("sata_grp",
455 byt_score_sata_pins, byt_score_sata_mux),
456 PIN_GROUP_SIMPLE("plt_clk0_grp",
457 byt_score_plt_clk0_pins, byt_score_plt_clk_mux),
458 PIN_GROUP_SIMPLE("plt_clk1_grp",
459 byt_score_plt_clk1_pins, byt_score_plt_clk_mux),
460 PIN_GROUP_SIMPLE("plt_clk2_grp",
461 byt_score_plt_clk2_pins, byt_score_plt_clk_mux),
462 PIN_GROUP_SIMPLE("plt_clk3_grp",
463 byt_score_plt_clk3_pins, byt_score_plt_clk_mux),
464 PIN_GROUP_SIMPLE("plt_clk4_grp",
465 byt_score_plt_clk4_pins, byt_score_plt_clk_mux),
466 PIN_GROUP_SIMPLE("plt_clk5_grp",
467 byt_score_plt_clk5_pins, byt_score_plt_clk_mux),
468 PIN_GROUP_SIMPLE("smbus_grp",
469 byt_score_smbus_pins, byt_score_smbus_mux),
470 };
471
472 static const char * const byt_score_uart_groups[] = {
473 "uart1_grp", "uart2_grp",
474 };
475 static const char * const byt_score_pwm_groups[] = {
476 "pwm0_grp", "pwm1_grp",
477 };
478 static const char * const byt_score_ssp_groups[] = {
479 "ssp0_grp", "ssp1_grp", "ssp2_grp",
480 };
481 static const char * const byt_score_spi_groups[] = { "sio_spi_grp" };
482 static const char * const byt_score_i2c_groups[] = {
483 "i2c0_grp", "i2c1_grp", "i2c2_grp", "i2c3_grp", "i2c4_grp", "i2c5_grp",
484 "i2c6_grp",
485 };
486 static const char * const byt_score_sdcard_groups[] = { "sdcard_grp" };
487 static const char * const byt_score_sdio_groups[] = { "sdio_grp" };
488 static const char * const byt_score_emmc_groups[] = { "emmc_grp" };
489 static const char * const byt_score_lpc_groups[] = { "lpc_grp" };
490 static const char * const byt_score_sata_groups[] = { "sata_grp" };
491 static const char * const byt_score_plt_clk_groups[] = {
492 "plt_clk0_grp", "plt_clk1_grp", "plt_clk2_grp", "plt_clk3_grp",
493 "plt_clk4_grp", "plt_clk5_grp",
494 };
495 static const char * const byt_score_smbus_groups[] = { "smbus_grp" };
496 static const char * const byt_score_gpio_groups[] = {
497 "uart1_grp", "uart2_grp", "pwm0_grp", "pwm1_grp", "ssp0_grp",
498 "ssp1_grp", "ssp2_grp", "sio_spi_grp", "i2c0_grp", "i2c1_grp",
499 "i2c2_grp", "i2c3_grp", "i2c4_grp", "i2c5_grp", "i2c6_grp",
500 "sdcard_grp", "sdio_grp", "emmc_grp", "lpc_grp", "sata_grp",
501 "plt_clk0_grp", "plt_clk1_grp", "plt_clk2_grp", "plt_clk3_grp",
502 "plt_clk4_grp", "plt_clk5_grp", "smbus_grp",
503
504 };
505
506 static const struct byt_function byt_score_functions[] = {
507 FUNCTION("uart", byt_score_uart_groups),
508 FUNCTION("pwm", byt_score_pwm_groups),
509 FUNCTION("ssp", byt_score_ssp_groups),
510 FUNCTION("spi", byt_score_spi_groups),
511 FUNCTION("i2c", byt_score_i2c_groups),
512 FUNCTION("sdcard", byt_score_sdcard_groups),
513 FUNCTION("sdio", byt_score_sdio_groups),
514 FUNCTION("emmc", byt_score_emmc_groups),
515 FUNCTION("lpc", byt_score_lpc_groups),
516 FUNCTION("sata", byt_score_sata_groups),
517 FUNCTION("plt_clk", byt_score_plt_clk_groups),
518 FUNCTION("smbus", byt_score_smbus_groups),
519 FUNCTION("gpio", byt_score_gpio_groups),
520 };
521
522 static const struct byt_community byt_score_communities[] = {
523 COMMUNITY(0, BYT_NGPIO_SCORE, byt_score_pins_map),
524 };
525
526 static const struct byt_pinctrl_soc_data byt_score_soc_data = {
527 .uid = BYT_SCORE_ACPI_UID,
528 .pins = byt_score_pins,
529 .npins = ARRAY_SIZE(byt_score_pins),
530 .groups = byt_score_groups,
531 .ngroups = ARRAY_SIZE(byt_score_groups),
532 .functions = byt_score_functions,
533 .nfunctions = ARRAY_SIZE(byt_score_functions),
534 .communities = byt_score_communities,
535 .ncommunities = ARRAY_SIZE(byt_score_communities),
536 };
537
538 /* SUS pins, aka GPIOS_<pin_no> or GPIO_S5[<pin_no>] */
539 static const struct pinctrl_pin_desc byt_sus_pins[] = {
540 PINCTRL_PIN(0, "GPIO_S50"),
541 PINCTRL_PIN(1, "GPIO_S51"),
542 PINCTRL_PIN(2, "GPIO_S52"),
543 PINCTRL_PIN(3, "GPIO_S53"),
544 PINCTRL_PIN(4, "GPIO_S54"),
545 PINCTRL_PIN(5, "GPIO_S55"),
546 PINCTRL_PIN(6, "GPIO_S56"),
547 PINCTRL_PIN(7, "GPIO_S57"),
548 PINCTRL_PIN(8, "GPIO_S58"),
549 PINCTRL_PIN(9, "GPIO_S59"),
550 PINCTRL_PIN(10, "GPIO_S510"),
551 PINCTRL_PIN(11, "PMC_SUSPWRDNACK"),
552 PINCTRL_PIN(12, "PMC_SUSCLK0"),
553 PINCTRL_PIN(13, "GPIO_S513"),
554 PINCTRL_PIN(14, "USB_ULPI_RST"),
555 PINCTRL_PIN(15, "PMC_WAKE_PCIE0#"),
556 PINCTRL_PIN(16, "PMC_PWRBTN"),
557 PINCTRL_PIN(17, "GPIO_S517"),
558 PINCTRL_PIN(18, "PMC_SUS_STAT"),
559 PINCTRL_PIN(19, "USB_OC0"),
560 PINCTRL_PIN(20, "USB_OC1"),
561 PINCTRL_PIN(21, "PCU_SPI_CS1"),
562 PINCTRL_PIN(22, "GPIO_S522"),
563 PINCTRL_PIN(23, "GPIO_S523"),
564 PINCTRL_PIN(24, "GPIO_S524"),
565 PINCTRL_PIN(25, "GPIO_S525"),
566 PINCTRL_PIN(26, "GPIO_S526"),
567 PINCTRL_PIN(27, "GPIO_S527"),
568 PINCTRL_PIN(28, "GPIO_S528"),
569 PINCTRL_PIN(29, "GPIO_S529"),
570 PINCTRL_PIN(30, "GPIO_S530"),
571 PINCTRL_PIN(31, "USB_ULPI_CLK"),
572 PINCTRL_PIN(32, "USB_ULPI_DATA0"),
573 PINCTRL_PIN(33, "USB_ULPI_DATA1"),
574 PINCTRL_PIN(34, "USB_ULPI_DATA2"),
575 PINCTRL_PIN(35, "USB_ULPI_DATA3"),
576 PINCTRL_PIN(36, "USB_ULPI_DATA4"),
577 PINCTRL_PIN(37, "USB_ULPI_DATA5"),
578 PINCTRL_PIN(38, "USB_ULPI_DATA6"),
579 PINCTRL_PIN(39, "USB_ULPI_DATA7"),
580 PINCTRL_PIN(40, "USB_ULPI_DIR"),
581 PINCTRL_PIN(41, "USB_ULPI_NXT"),
582 PINCTRL_PIN(42, "USB_ULPI_STP"),
583 PINCTRL_PIN(43, "USB_ULPI_REFCLK"),
584 };
585
586 static const unsigned int byt_sus_pins_map[BYT_NGPIO_SUS] = {
587 29, 33, 30, 31, 32, 34, 36, 35, 38, 37,
588 18, 7, 11, 20, 17, 1, 8, 10, 19, 12,
589 0, 2, 23, 39, 28, 27, 22, 21, 24, 25,
590 26, 51, 56, 54, 49, 55, 48, 57, 50, 58,
591 52, 53, 59, 40,
592 };
593
594 static const unsigned int byt_sus_usb_over_current_pins[] = { 19, 20 };
595 static const struct byt_simple_func_mux byt_sus_usb_oc_mux[] = {
596 SIMPLE_FUNC("usb", 0),
597 SIMPLE_FUNC("gpio", 1),
598 };
599
600 static const unsigned int byt_sus_usb_ulpi_pins[] = {
601 14, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43,
602 };
603 static const unsigned short byt_sus_usb_ulpi_mode_values[] = {
604 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
605 };
606 static const unsigned short byt_sus_usb_ulpi_gpio_mode_values[] = {
607 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
608 };
609 static const struct byt_mixed_func_mux byt_sus_usb_ulpi_mux[] = {
610 MIXED_FUNC("usb", byt_sus_usb_ulpi_mode_values),
611 MIXED_FUNC("gpio", byt_sus_usb_ulpi_gpio_mode_values),
612 };
613
614 static const unsigned int byt_sus_pcu_spi_pins[] = { 21 };
615 static const struct byt_simple_func_mux byt_sus_pcu_spi_mux[] = {
616 SIMPLE_FUNC("spi", 0),
617 SIMPLE_FUNC("gpio", 1),
618 };
619
620 static const struct byt_pingroup byt_sus_groups[] = {
621 PIN_GROUP_SIMPLE("usb_oc_grp",
622 byt_sus_usb_over_current_pins, byt_sus_usb_oc_mux),
623 PIN_GROUP_MIXED("usb_ulpi_grp",
624 byt_sus_usb_ulpi_pins, byt_sus_usb_ulpi_mux),
625 PIN_GROUP_SIMPLE("pcu_spi_grp",
626 byt_sus_pcu_spi_pins, byt_sus_pcu_spi_mux),
627 };
628
629 static const char * const byt_sus_usb_groups[] = {
630 "usb_oc_grp", "usb_ulpi_grp",
631 };
632 static const char * const byt_sus_spi_groups[] = { "pcu_spi_grp" };
633 static const char * const byt_sus_gpio_groups[] = {
634 "usb_oc_grp", "usb_ulpi_grp", "pcu_spi_grp",
635 };
636
637 static const struct byt_function byt_sus_functions[] = {
638 FUNCTION("usb", byt_sus_usb_groups),
639 FUNCTION("spi", byt_sus_spi_groups),
640 FUNCTION("gpio", byt_sus_gpio_groups),
641 };
642
643 static const struct byt_community byt_sus_communities[] = {
644 COMMUNITY(0, BYT_NGPIO_SUS, byt_sus_pins_map),
645 };
646
647 static const struct byt_pinctrl_soc_data byt_sus_soc_data = {
648 .uid = BYT_SUS_ACPI_UID,
649 .pins = byt_sus_pins,
650 .npins = ARRAY_SIZE(byt_sus_pins),
651 .groups = byt_sus_groups,
652 .ngroups = ARRAY_SIZE(byt_sus_groups),
653 .functions = byt_sus_functions,
654 .nfunctions = ARRAY_SIZE(byt_sus_functions),
655 .communities = byt_sus_communities,
656 .ncommunities = ARRAY_SIZE(byt_sus_communities),
657 };
658
659 static const struct pinctrl_pin_desc byt_ncore_pins[] = {
660 PINCTRL_PIN(0, "GPIO_NCORE0"),
661 PINCTRL_PIN(1, "GPIO_NCORE1"),
662 PINCTRL_PIN(2, "GPIO_NCORE2"),
663 PINCTRL_PIN(3, "GPIO_NCORE3"),
664 PINCTRL_PIN(4, "GPIO_NCORE4"),
665 PINCTRL_PIN(5, "GPIO_NCORE5"),
666 PINCTRL_PIN(6, "GPIO_NCORE6"),
667 PINCTRL_PIN(7, "GPIO_NCORE7"),
668 PINCTRL_PIN(8, "GPIO_NCORE8"),
669 PINCTRL_PIN(9, "GPIO_NCORE9"),
670 PINCTRL_PIN(10, "GPIO_NCORE10"),
671 PINCTRL_PIN(11, "GPIO_NCORE11"),
672 PINCTRL_PIN(12, "GPIO_NCORE12"),
673 PINCTRL_PIN(13, "GPIO_NCORE13"),
674 PINCTRL_PIN(14, "GPIO_NCORE14"),
675 PINCTRL_PIN(15, "GPIO_NCORE15"),
676 PINCTRL_PIN(16, "GPIO_NCORE16"),
677 PINCTRL_PIN(17, "GPIO_NCORE17"),
678 PINCTRL_PIN(18, "GPIO_NCORE18"),
679 PINCTRL_PIN(19, "GPIO_NCORE19"),
680 PINCTRL_PIN(20, "GPIO_NCORE20"),
681 PINCTRL_PIN(21, "GPIO_NCORE21"),
682 PINCTRL_PIN(22, "GPIO_NCORE22"),
683 PINCTRL_PIN(23, "GPIO_NCORE23"),
684 PINCTRL_PIN(24, "GPIO_NCORE24"),
685 PINCTRL_PIN(25, "GPIO_NCORE25"),
686 PINCTRL_PIN(26, "GPIO_NCORE26"),
687 PINCTRL_PIN(27, "GPIO_NCORE27"),
688 };
689
690 static unsigned const byt_ncore_pins_map[BYT_NGPIO_NCORE] = {
691 19, 18, 17, 20, 21, 22, 24, 25, 23, 16,
692 14, 15, 12, 26, 27, 1, 4, 8, 11, 0,
693 3, 6, 10, 13, 2, 5, 9, 7,
694 };
695
696 static const struct byt_community byt_ncore_communities[] = {
697 COMMUNITY(0, BYT_NGPIO_NCORE, byt_ncore_pins_map),
698 };
699
700 static const struct byt_pinctrl_soc_data byt_ncore_soc_data = {
701 .uid = BYT_NCORE_ACPI_UID,
702 .pins = byt_ncore_pins,
703 .npins = ARRAY_SIZE(byt_ncore_pins),
704 .communities = byt_ncore_communities,
705 .ncommunities = ARRAY_SIZE(byt_ncore_communities),
706 };
707
708 static const struct byt_pinctrl_soc_data *byt_soc_data[] = {
709 &byt_score_soc_data,
710 &byt_sus_soc_data,
711 &byt_ncore_soc_data,
712 NULL,
713 };
714
715 static struct byt_community *byt_get_community(struct byt_gpio *vg,
716 unsigned int pin)
717 {
718 struct byt_community *comm;
719 int i;
720
721 for (i = 0; i < vg->soc_data->ncommunities; i++) {
722 comm = vg->communities_copy + i;
723 if (pin < comm->pin_base + comm->npins && pin >= comm->pin_base)
724 return comm;
725 }
726
727 return NULL;
728 }
729
730 static void __iomem *byt_gpio_reg(struct byt_gpio *vg, unsigned int offset,
731 int reg)
732 {
733 struct byt_community *comm = byt_get_community(vg, offset);
734 u32 reg_offset = 0;
735
736 if (!comm)
737 return NULL;
738
739 offset -= comm->pin_base;
740 if (reg == BYT_INT_STAT_REG)
741 reg_offset = (offset / 32) * 4;
742 else
743 reg_offset = comm->pad_map[offset] * 16;
744
745 return comm->reg_base + reg_offset + reg;
746 }
747
748 static int byt_get_groups_count(struct pinctrl_dev *pctldev)
749 {
750 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev);
751
752 return vg->soc_data->ngroups;
753 }
754
755 static const char *byt_get_group_name(struct pinctrl_dev *pctldev,
756 unsigned int selector)
757 {
758 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev);
759
760 return vg->soc_data->groups[selector].name;
761 }
762
763 static int byt_get_group_pins(struct pinctrl_dev *pctldev,
764 unsigned int selector,
765 const unsigned int **pins,
766 unsigned int *num_pins)
767 {
768 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev);
769
770 *pins = vg->soc_data->groups[selector].pins;
771 *num_pins = vg->soc_data->groups[selector].npins;
772
773 return 0;
774 }
775
776 static const struct pinctrl_ops byt_pinctrl_ops = {
777 .get_groups_count = byt_get_groups_count,
778 .get_group_name = byt_get_group_name,
779 .get_group_pins = byt_get_group_pins,
780 };
781
782 static int byt_get_functions_count(struct pinctrl_dev *pctldev)
783 {
784 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev);
785
786 return vg->soc_data->nfunctions;
787 }
788
789 static const char *byt_get_function_name(struct pinctrl_dev *pctldev,
790 unsigned int selector)
791 {
792 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev);
793
794 return vg->soc_data->functions[selector].name;
795 }
796
797 static int byt_get_function_groups(struct pinctrl_dev *pctldev,
798 unsigned int selector,
799 const char * const **groups,
800 unsigned int *num_groups)
801 {
802 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev);
803
804 *groups = vg->soc_data->functions[selector].groups;
805 *num_groups = vg->soc_data->functions[selector].ngroups;
806
807 return 0;
808 }
809
810 static int byt_get_group_simple_mux(const struct byt_pingroup group,
811 const char *func_name,
812 unsigned short *func)
813 {
814 int i;
815
816 for (i = 0; i < group.nfuncs; i++) {
817 if (!strcmp(group.simple_funcs[i].name, func_name)) {
818 *func = group.simple_funcs[i].func;
819 return 0;
820 }
821 }
822
823 return 1;
824 }
825
826 static int byt_get_group_mixed_mux(const struct byt_pingroup group,
827 const char *func_name,
828 const unsigned short **func)
829 {
830 int i;
831
832 for (i = 0; i < group.nfuncs; i++) {
833 if (!strcmp(group.mixed_funcs[i].name, func_name)) {
834 *func = group.mixed_funcs[i].func_values;
835 return 0;
836 }
837 }
838
839 return 1;
840 }
841
842 static void byt_set_group_simple_mux(struct byt_gpio *vg,
843 const struct byt_pingroup group,
844 unsigned short func)
845 {
846 unsigned long flags;
847 int i;
848
849 raw_spin_lock_irqsave(&vg->lock, flags);
850
851 for (i = 0; i < group.npins; i++) {
852 void __iomem *padcfg0;
853 u32 value;
854
855 padcfg0 = byt_gpio_reg(vg, group.pins[i], BYT_CONF0_REG);
856 if (!padcfg0) {
857 dev_warn(&vg->pdev->dev,
858 "Group %s, pin %i not muxed (no padcfg0)\n",
859 group.name, i);
860 continue;
861 }
862
863 value = readl(padcfg0);
864 value &= ~BYT_PIN_MUX;
865 value |= func;
866 writel(value, padcfg0);
867 }
868
869 raw_spin_unlock_irqrestore(&vg->lock, flags);
870 }
871
872 static void byt_set_group_mixed_mux(struct byt_gpio *vg,
873 const struct byt_pingroup group,
874 const unsigned short *func)
875 {
876 unsigned long flags;
877 int i;
878
879 raw_spin_lock_irqsave(&vg->lock, flags);
880
881 for (i = 0; i < group.npins; i++) {
882 void __iomem *padcfg0;
883 u32 value;
884
885 padcfg0 = byt_gpio_reg(vg, group.pins[i], BYT_CONF0_REG);
886 if (!padcfg0) {
887 dev_warn(&vg->pdev->dev,
888 "Group %s, pin %i not muxed (no padcfg0)\n",
889 group.name, i);
890 continue;
891 }
892
893 value = readl(padcfg0);
894 value &= ~BYT_PIN_MUX;
895 value |= func[i];
896 writel(value, padcfg0);
897 }
898
899 raw_spin_unlock_irqrestore(&vg->lock, flags);
900 }
901
902 static int byt_set_mux(struct pinctrl_dev *pctldev, unsigned int func_selector,
903 unsigned int group_selector)
904 {
905 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev);
906 const struct byt_function func = vg->soc_data->functions[func_selector];
907 const struct byt_pingroup group = vg->soc_data->groups[group_selector];
908 const unsigned short *mixed_func;
909 unsigned short simple_func;
910 int ret = 1;
911
912 if (group.has_simple_funcs)
913 ret = byt_get_group_simple_mux(group, func.name, &simple_func);
914 else
915 ret = byt_get_group_mixed_mux(group, func.name, &mixed_func);
916
917 if (ret)
918 byt_set_group_simple_mux(vg, group, BYT_DEFAULT_GPIO_MUX);
919 else if (group.has_simple_funcs)
920 byt_set_group_simple_mux(vg, group, simple_func);
921 else
922 byt_set_group_mixed_mux(vg, group, mixed_func);
923
924 return 0;
925 }
926
927 static u32 byt_get_gpio_mux(struct byt_gpio *vg, unsigned offset)
928 {
929 /* SCORE pin 92-93 */
930 if (!strcmp(vg->soc_data->uid, BYT_SCORE_ACPI_UID) &&
931 offset >= 92 && offset <= 93)
932 return 1;
933
934 /* SUS pin 11-21 */
935 if (!strcmp(vg->soc_data->uid, BYT_SUS_ACPI_UID) &&
936 offset >= 11 && offset <= 21)
937 return 1;
938
939 return 0;
940 }
941
942 static void byt_gpio_clear_triggering(struct byt_gpio *vg, unsigned int offset)
943 {
944 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
945 unsigned long flags;
946 u32 value;
947
948 raw_spin_lock_irqsave(&vg->lock, flags);
949 value = readl(reg);
950 value &= ~(BYT_TRIG_POS | BYT_TRIG_NEG | BYT_TRIG_LVL);
951 writel(value, reg);
952 raw_spin_unlock_irqrestore(&vg->lock, flags);
953 }
954
955 static int byt_gpio_request_enable(struct pinctrl_dev *pctl_dev,
956 struct pinctrl_gpio_range *range,
957 unsigned int offset)
958 {
959 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctl_dev);
960 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
961 u32 value, gpio_mux;
962 unsigned long flags;
963
964 raw_spin_lock_irqsave(&vg->lock, flags);
965
966 /*
967 * In most cases, func pin mux 000 means GPIO function.
968 * But, some pins may have func pin mux 001 represents
969 * GPIO function.
970 *
971 * Because there are devices out there where some pins were not
972 * configured correctly we allow changing the mux value from
973 * request (but print out warning about that).
974 */
975 value = readl(reg) & BYT_PIN_MUX;
976 gpio_mux = byt_get_gpio_mux(vg, offset);
977 if (WARN_ON(gpio_mux != value)) {
978 value = readl(reg) & ~BYT_PIN_MUX;
979 value |= gpio_mux;
980 writel(value, reg);
981
982 dev_warn(&vg->pdev->dev,
983 "pin %u forcibly re-configured as GPIO\n", offset);
984 }
985
986 raw_spin_unlock_irqrestore(&vg->lock, flags);
987
988 pm_runtime_get(&vg->pdev->dev);
989
990 return 0;
991 }
992
993 static void byt_gpio_disable_free(struct pinctrl_dev *pctl_dev,
994 struct pinctrl_gpio_range *range,
995 unsigned int offset)
996 {
997 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctl_dev);
998
999 byt_gpio_clear_triggering(vg, offset);
1000 pm_runtime_put(&vg->pdev->dev);
1001 }
1002
1003 static int byt_gpio_set_direction(struct pinctrl_dev *pctl_dev,
1004 struct pinctrl_gpio_range *range,
1005 unsigned int offset,
1006 bool input)
1007 {
1008 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctl_dev);
1009 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
1010 void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
1011 unsigned long flags;
1012 u32 value;
1013
1014 raw_spin_lock_irqsave(&vg->lock, flags);
1015
1016 value = readl(val_reg);
1017 value &= ~BYT_DIR_MASK;
1018 if (input)
1019 value |= BYT_OUTPUT_EN;
1020 else
1021 /*
1022 * Before making any direction modifications, do a check if gpio
1023 * is set for direct IRQ. On baytrail, setting GPIO to output
1024 * does not make sense, so let's at least warn the caller before
1025 * they shoot themselves in the foot.
1026 */
1027 WARN(readl(conf_reg) & BYT_DIRECT_IRQ_EN,
1028 "Potential Error: Setting GPIO with direct_irq_en to output");
1029 writel(value, val_reg);
1030
1031 raw_spin_unlock_irqrestore(&vg->lock, flags);
1032
1033 return 0;
1034 }
1035
1036 static const struct pinmux_ops byt_pinmux_ops = {
1037 .get_functions_count = byt_get_functions_count,
1038 .get_function_name = byt_get_function_name,
1039 .get_function_groups = byt_get_function_groups,
1040 .set_mux = byt_set_mux,
1041 .gpio_request_enable = byt_gpio_request_enable,
1042 .gpio_disable_free = byt_gpio_disable_free,
1043 .gpio_set_direction = byt_gpio_set_direction,
1044 };
1045
1046 static void byt_get_pull_strength(u32 reg, u16 *strength)
1047 {
1048 switch (reg & BYT_PULL_STR_MASK) {
1049 case BYT_PULL_STR_2K:
1050 *strength = 2000;
1051 break;
1052 case BYT_PULL_STR_10K:
1053 *strength = 10000;
1054 break;
1055 case BYT_PULL_STR_20K:
1056 *strength = 20000;
1057 break;
1058 case BYT_PULL_STR_40K:
1059 *strength = 40000;
1060 break;
1061 }
1062 }
1063
1064 static int byt_set_pull_strength(u32 *reg, u16 strength)
1065 {
1066 *reg &= ~BYT_PULL_STR_MASK;
1067
1068 switch (strength) {
1069 case 2000:
1070 *reg |= BYT_PULL_STR_2K;
1071 break;
1072 case 10000:
1073 *reg |= BYT_PULL_STR_10K;
1074 break;
1075 case 20000:
1076 *reg |= BYT_PULL_STR_20K;
1077 break;
1078 case 40000:
1079 *reg |= BYT_PULL_STR_40K;
1080 break;
1081 default:
1082 return -EINVAL;
1083 }
1084
1085 return 0;
1086 }
1087
1088 static int byt_pin_config_get(struct pinctrl_dev *pctl_dev, unsigned int offset,
1089 unsigned long *config)
1090 {
1091 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctl_dev);
1092 enum pin_config_param param = pinconf_to_config_param(*config);
1093 void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
1094 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
1095 void __iomem *db_reg = byt_gpio_reg(vg, offset, BYT_DEBOUNCE_REG);
1096 unsigned long flags;
1097 u32 conf, pull, val, debounce;
1098 u16 arg = 0;
1099
1100 raw_spin_lock_irqsave(&vg->lock, flags);
1101 conf = readl(conf_reg);
1102 pull = conf & BYT_PULL_ASSIGN_MASK;
1103 val = readl(val_reg);
1104 raw_spin_unlock_irqrestore(&vg->lock, flags);
1105
1106 switch (param) {
1107 case PIN_CONFIG_BIAS_DISABLE:
1108 if (pull)
1109 return -EINVAL;
1110 break;
1111 case PIN_CONFIG_BIAS_PULL_DOWN:
1112 /* Pull assignment is only applicable in input mode */
1113 if ((val & BYT_INPUT_EN) || pull != BYT_PULL_ASSIGN_DOWN)
1114 return -EINVAL;
1115
1116 byt_get_pull_strength(conf, &arg);
1117
1118 break;
1119 case PIN_CONFIG_BIAS_PULL_UP:
1120 /* Pull assignment is only applicable in input mode */
1121 if ((val & BYT_INPUT_EN) || pull != BYT_PULL_ASSIGN_UP)
1122 return -EINVAL;
1123
1124 byt_get_pull_strength(conf, &arg);
1125
1126 break;
1127 case PIN_CONFIG_INPUT_DEBOUNCE:
1128 if (!(conf & BYT_DEBOUNCE_EN))
1129 return -EINVAL;
1130
1131 raw_spin_lock_irqsave(&vg->lock, flags);
1132 debounce = readl(db_reg);
1133 raw_spin_unlock_irqrestore(&vg->lock, flags);
1134
1135 switch (debounce & BYT_DEBOUNCE_PULSE_MASK) {
1136 case BYT_DEBOUNCE_PULSE_375US:
1137 arg = 375;
1138 break;
1139 case BYT_DEBOUNCE_PULSE_750US:
1140 arg = 750;
1141 break;
1142 case BYT_DEBOUNCE_PULSE_1500US:
1143 arg = 1500;
1144 break;
1145 case BYT_DEBOUNCE_PULSE_3MS:
1146 arg = 3000;
1147 break;
1148 case BYT_DEBOUNCE_PULSE_6MS:
1149 arg = 6000;
1150 break;
1151 case BYT_DEBOUNCE_PULSE_12MS:
1152 arg = 12000;
1153 break;
1154 case BYT_DEBOUNCE_PULSE_24MS:
1155 arg = 24000;
1156 break;
1157 default:
1158 return -EINVAL;
1159 }
1160
1161 break;
1162 default:
1163 return -ENOTSUPP;
1164 }
1165
1166 *config = pinconf_to_config_packed(param, arg);
1167
1168 return 0;
1169 }
1170
1171 static int byt_pin_config_set(struct pinctrl_dev *pctl_dev,
1172 unsigned int offset,
1173 unsigned long *configs,
1174 unsigned int num_configs)
1175 {
1176 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctl_dev);
1177 unsigned int param, arg;
1178 void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
1179 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
1180 void __iomem *db_reg = byt_gpio_reg(vg, offset, BYT_DEBOUNCE_REG);
1181 unsigned long flags;
1182 u32 conf, val, debounce;
1183 int i, ret = 0;
1184
1185 raw_spin_lock_irqsave(&vg->lock, flags);
1186
1187 conf = readl(conf_reg);
1188 val = readl(val_reg);
1189
1190 for (i = 0; i < num_configs; i++) {
1191 param = pinconf_to_config_param(configs[i]);
1192 arg = pinconf_to_config_argument(configs[i]);
1193
1194 switch (param) {
1195 case PIN_CONFIG_BIAS_DISABLE:
1196 conf &= ~BYT_PULL_ASSIGN_MASK;
1197 break;
1198 case PIN_CONFIG_BIAS_PULL_DOWN:
1199 /* Set default strength value in case none is given */
1200 if (arg == 1)
1201 arg = 2000;
1202
1203 /*
1204 * Pull assignment is only applicable in input mode. If
1205 * chip is not in input mode, set it and warn about it.
1206 */
1207 if (val & BYT_INPUT_EN) {
1208 val &= ~BYT_INPUT_EN;
1209 writel(val, val_reg);
1210 dev_warn(&vg->pdev->dev,
1211 "pin %u forcibly set to input mode\n",
1212 offset);
1213 }
1214
1215 conf &= ~BYT_PULL_ASSIGN_MASK;
1216 conf |= BYT_PULL_ASSIGN_DOWN;
1217 ret = byt_set_pull_strength(&conf, arg);
1218
1219 break;
1220 case PIN_CONFIG_BIAS_PULL_UP:
1221 /* Set default strength value in case none is given */
1222 if (arg == 1)
1223 arg = 2000;
1224
1225 /*
1226 * Pull assignment is only applicable in input mode. If
1227 * chip is not in input mode, set it and warn about it.
1228 */
1229 if (val & BYT_INPUT_EN) {
1230 val &= ~BYT_INPUT_EN;
1231 writel(val, val_reg);
1232 dev_warn(&vg->pdev->dev,
1233 "pin %u forcibly set to input mode\n",
1234 offset);
1235 }
1236
1237 conf &= ~BYT_PULL_ASSIGN_MASK;
1238 conf |= BYT_PULL_ASSIGN_UP;
1239 ret = byt_set_pull_strength(&conf, arg);
1240
1241 break;
1242 case PIN_CONFIG_INPUT_DEBOUNCE:
1243 debounce = readl(db_reg);
1244 debounce &= ~BYT_DEBOUNCE_PULSE_MASK;
1245
1246 switch (arg) {
1247 case 0:
1248 conf &= BYT_DEBOUNCE_EN;
1249 break;
1250 case 375:
1251 debounce |= BYT_DEBOUNCE_PULSE_375US;
1252 break;
1253 case 750:
1254 debounce |= BYT_DEBOUNCE_PULSE_750US;
1255 break;
1256 case 1500:
1257 debounce |= BYT_DEBOUNCE_PULSE_1500US;
1258 break;
1259 case 3000:
1260 debounce |= BYT_DEBOUNCE_PULSE_3MS;
1261 break;
1262 case 6000:
1263 debounce |= BYT_DEBOUNCE_PULSE_6MS;
1264 break;
1265 case 12000:
1266 debounce |= BYT_DEBOUNCE_PULSE_12MS;
1267 break;
1268 case 24000:
1269 debounce |= BYT_DEBOUNCE_PULSE_24MS;
1270 break;
1271 default:
1272 ret = -EINVAL;
1273 }
1274
1275 if (!ret)
1276 writel(debounce, db_reg);
1277 break;
1278 default:
1279 ret = -ENOTSUPP;
1280 }
1281
1282 if (ret)
1283 break;
1284 }
1285
1286 if (!ret)
1287 writel(conf, conf_reg);
1288
1289 raw_spin_unlock_irqrestore(&vg->lock, flags);
1290
1291 return ret;
1292 }
1293
1294 static const struct pinconf_ops byt_pinconf_ops = {
1295 .is_generic = true,
1296 .pin_config_get = byt_pin_config_get,
1297 .pin_config_set = byt_pin_config_set,
1298 };
1299
1300 static const struct pinctrl_desc byt_pinctrl_desc = {
1301 .pctlops = &byt_pinctrl_ops,
1302 .pmxops = &byt_pinmux_ops,
1303 .confops = &byt_pinconf_ops,
1304 .owner = THIS_MODULE,
1305 };
1306
1307 static int byt_gpio_get(struct gpio_chip *chip, unsigned offset)
1308 {
1309 struct byt_gpio *vg = gpiochip_get_data(chip);
1310 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
1311 unsigned long flags;
1312 u32 val;
1313
1314 raw_spin_lock_irqsave(&vg->lock, flags);
1315 val = readl(reg);
1316 raw_spin_unlock_irqrestore(&vg->lock, flags);
1317
1318 return !!(val & BYT_LEVEL);
1319 }
1320
1321 static void byt_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
1322 {
1323 struct byt_gpio *vg = gpiochip_get_data(chip);
1324 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
1325 unsigned long flags;
1326 u32 old_val;
1327
1328 if (!reg)
1329 return;
1330
1331 raw_spin_lock_irqsave(&vg->lock, flags);
1332 old_val = readl(reg);
1333 if (value)
1334 writel(old_val | BYT_LEVEL, reg);
1335 else
1336 writel(old_val & ~BYT_LEVEL, reg);
1337 raw_spin_unlock_irqrestore(&vg->lock, flags);
1338 }
1339
1340 static int byt_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
1341 {
1342 struct byt_gpio *vg = gpiochip_get_data(chip);
1343 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_VAL_REG);
1344 unsigned long flags;
1345 u32 value;
1346
1347 if (!reg)
1348 return -EINVAL;
1349
1350 raw_spin_lock_irqsave(&vg->lock, flags);
1351 value = readl(reg);
1352 raw_spin_unlock_irqrestore(&vg->lock, flags);
1353
1354 if (!(value & BYT_OUTPUT_EN))
1355 return GPIOF_DIR_OUT;
1356 if (!(value & BYT_INPUT_EN))
1357 return GPIOF_DIR_IN;
1358
1359 return -EINVAL;
1360 }
1361
1362 static int byt_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
1363 {
1364 return pinctrl_gpio_direction_input(chip->base + offset);
1365 }
1366
1367 static int byt_gpio_direction_output(struct gpio_chip *chip,
1368 unsigned int offset, int value)
1369 {
1370 int ret = pinctrl_gpio_direction_output(chip->base + offset);
1371
1372 if (ret)
1373 return ret;
1374
1375 byt_gpio_set(chip, offset, value);
1376
1377 return 0;
1378 }
1379
1380 static void byt_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
1381 {
1382 struct byt_gpio *vg = gpiochip_get_data(chip);
1383 int i;
1384 u32 conf0, val;
1385
1386 for (i = 0; i < vg->soc_data->npins; i++) {
1387 const struct byt_community *comm;
1388 const char *pull_str = NULL;
1389 const char *pull = NULL;
1390 void __iomem *reg;
1391 unsigned long flags;
1392 const char *label;
1393 unsigned int pin;
1394
1395 raw_spin_lock_irqsave(&vg->lock, flags);
1396 pin = vg->soc_data->pins[i].number;
1397 reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG);
1398 if (!reg) {
1399 seq_printf(s,
1400 "Could not retrieve pin %i conf0 reg\n",
1401 pin);
1402 raw_spin_unlock_irqrestore(&vg->lock, flags);
1403 continue;
1404 }
1405 conf0 = readl(reg);
1406
1407 reg = byt_gpio_reg(vg, pin, BYT_VAL_REG);
1408 if (!reg) {
1409 seq_printf(s,
1410 "Could not retrieve pin %i val reg\n", pin);
1411 raw_spin_unlock_irqrestore(&vg->lock, flags);
1412 continue;
1413 }
1414 val = readl(reg);
1415 raw_spin_unlock_irqrestore(&vg->lock, flags);
1416
1417 comm = byt_get_community(vg, pin);
1418 if (!comm) {
1419 seq_printf(s,
1420 "Could not get community for pin %i\n", pin);
1421 continue;
1422 }
1423 label = gpiochip_is_requested(chip, i);
1424 if (!label)
1425 label = "Unrequested";
1426
1427 switch (conf0 & BYT_PULL_ASSIGN_MASK) {
1428 case BYT_PULL_ASSIGN_UP:
1429 pull = "up";
1430 break;
1431 case BYT_PULL_ASSIGN_DOWN:
1432 pull = "down";
1433 break;
1434 }
1435
1436 switch (conf0 & BYT_PULL_STR_MASK) {
1437 case BYT_PULL_STR_2K:
1438 pull_str = "2k";
1439 break;
1440 case BYT_PULL_STR_10K:
1441 pull_str = "10k";
1442 break;
1443 case BYT_PULL_STR_20K:
1444 pull_str = "20k";
1445 break;
1446 case BYT_PULL_STR_40K:
1447 pull_str = "40k";
1448 break;
1449 }
1450
1451 seq_printf(s,
1452 " gpio-%-3d (%-20.20s) %s %s %s pad-%-3d offset:0x%03x mux:%d %s%s%s",
1453 pin,
1454 label,
1455 val & BYT_INPUT_EN ? " " : "in",
1456 val & BYT_OUTPUT_EN ? " " : "out",
1457 val & BYT_LEVEL ? "hi" : "lo",
1458 comm->pad_map[i], comm->pad_map[i] * 32,
1459 conf0 & 0x7,
1460 conf0 & BYT_TRIG_NEG ? " fall" : " ",
1461 conf0 & BYT_TRIG_POS ? " rise" : " ",
1462 conf0 & BYT_TRIG_LVL ? " level" : " ");
1463
1464 if (pull && pull_str)
1465 seq_printf(s, " %-4s %-3s", pull, pull_str);
1466 else
1467 seq_puts(s, " ");
1468
1469 if (conf0 & BYT_IODEN)
1470 seq_puts(s, " open-drain");
1471
1472 seq_puts(s, "\n");
1473 }
1474 }
1475
1476 static const struct gpio_chip byt_gpio_chip = {
1477 .owner = THIS_MODULE,
1478 .request = gpiochip_generic_request,
1479 .free = gpiochip_generic_free,
1480 .get_direction = byt_gpio_get_direction,
1481 .direction_input = byt_gpio_direction_input,
1482 .direction_output = byt_gpio_direction_output,
1483 .get = byt_gpio_get,
1484 .set = byt_gpio_set,
1485 .dbg_show = byt_gpio_dbg_show,
1486 };
1487
1488 static void byt_irq_ack(struct irq_data *d)
1489 {
1490 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1491 struct byt_gpio *vg = gpiochip_get_data(gc);
1492 unsigned offset = irqd_to_hwirq(d);
1493 void __iomem *reg;
1494
1495 reg = byt_gpio_reg(vg, offset, BYT_INT_STAT_REG);
1496 if (!reg)
1497 return;
1498
1499 raw_spin_lock(&vg->lock);
1500 writel(BIT(offset % 32), reg);
1501 raw_spin_unlock(&vg->lock);
1502 }
1503
1504 static void byt_irq_mask(struct irq_data *d)
1505 {
1506 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1507 struct byt_gpio *vg = gpiochip_get_data(gc);
1508
1509 byt_gpio_clear_triggering(vg, irqd_to_hwirq(d));
1510 }
1511
1512 static void byt_irq_unmask(struct irq_data *d)
1513 {
1514 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1515 struct byt_gpio *vg = gpiochip_get_data(gc);
1516 unsigned offset = irqd_to_hwirq(d);
1517 unsigned long flags;
1518 void __iomem *reg;
1519 u32 value;
1520
1521 reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
1522 if (!reg)
1523 return;
1524
1525 raw_spin_lock_irqsave(&vg->lock, flags);
1526 value = readl(reg);
1527
1528 switch (irqd_get_trigger_type(d)) {
1529 case IRQ_TYPE_LEVEL_HIGH:
1530 value |= BYT_TRIG_LVL;
1531 case IRQ_TYPE_EDGE_RISING:
1532 value |= BYT_TRIG_POS;
1533 break;
1534 case IRQ_TYPE_LEVEL_LOW:
1535 value |= BYT_TRIG_LVL;
1536 case IRQ_TYPE_EDGE_FALLING:
1537 value |= BYT_TRIG_NEG;
1538 break;
1539 case IRQ_TYPE_EDGE_BOTH:
1540 value |= (BYT_TRIG_NEG | BYT_TRIG_POS);
1541 break;
1542 }
1543
1544 writel(value, reg);
1545
1546 raw_spin_unlock_irqrestore(&vg->lock, flags);
1547 }
1548
1549 static int byt_irq_type(struct irq_data *d, unsigned int type)
1550 {
1551 struct byt_gpio *vg = gpiochip_get_data(irq_data_get_irq_chip_data(d));
1552 u32 offset = irqd_to_hwirq(d);
1553 u32 value;
1554 unsigned long flags;
1555 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
1556
1557 if (!reg || offset >= vg->chip.ngpio)
1558 return -EINVAL;
1559
1560 raw_spin_lock_irqsave(&vg->lock, flags);
1561 value = readl(reg);
1562
1563 WARN(value & BYT_DIRECT_IRQ_EN,
1564 "Bad pad config for io mode, force direct_irq_en bit clearing");
1565
1566 /* For level trigges the BYT_TRIG_POS and BYT_TRIG_NEG bits
1567 * are used to indicate high and low level triggering
1568 */
1569 value &= ~(BYT_DIRECT_IRQ_EN | BYT_TRIG_POS | BYT_TRIG_NEG |
1570 BYT_TRIG_LVL);
1571
1572 writel(value, reg);
1573
1574 if (type & IRQ_TYPE_EDGE_BOTH)
1575 irq_set_handler_locked(d, handle_edge_irq);
1576 else if (type & IRQ_TYPE_LEVEL_MASK)
1577 irq_set_handler_locked(d, handle_level_irq);
1578
1579 raw_spin_unlock_irqrestore(&vg->lock, flags);
1580
1581 return 0;
1582 }
1583
1584 static struct irq_chip byt_irqchip = {
1585 .name = "BYT-GPIO",
1586 .irq_ack = byt_irq_ack,
1587 .irq_mask = byt_irq_mask,
1588 .irq_unmask = byt_irq_unmask,
1589 .irq_set_type = byt_irq_type,
1590 .flags = IRQCHIP_SKIP_SET_WAKE,
1591 };
1592
1593 static void byt_gpio_irq_handler(struct irq_desc *desc)
1594 {
1595 struct irq_data *data = irq_desc_get_irq_data(desc);
1596 struct byt_gpio *vg = gpiochip_get_data(
1597 irq_desc_get_handler_data(desc));
1598 struct irq_chip *chip = irq_data_get_irq_chip(data);
1599 u32 base, pin;
1600 void __iomem *reg;
1601 unsigned long pending;
1602 unsigned int virq;
1603
1604 /* check from GPIO controller which pin triggered the interrupt */
1605 for (base = 0; base < vg->chip.ngpio; base += 32) {
1606 reg = byt_gpio_reg(vg, base, BYT_INT_STAT_REG);
1607
1608 if (!reg) {
1609 dev_warn(&vg->pdev->dev,
1610 "Pin %i: could not retrieve interrupt status register\n",
1611 base);
1612 continue;
1613 }
1614
1615 pending = readl(reg);
1616 for_each_set_bit(pin, &pending, 32) {
1617 virq = irq_find_mapping(vg->chip.irqdomain, base + pin);
1618 generic_handle_irq(virq);
1619 }
1620 }
1621 chip->irq_eoi(data);
1622 }
1623
1624 static void byt_gpio_irq_init_hw(struct byt_gpio *vg)
1625 {
1626 struct gpio_chip *gc = &vg->chip;
1627 struct device *dev = &vg->pdev->dev;
1628 void __iomem *reg;
1629 u32 base, value;
1630 int i;
1631
1632 /*
1633 * Clear interrupt triggers for all pins that are GPIOs and
1634 * do not use direct IRQ mode. This will prevent spurious
1635 * interrupts from misconfigured pins.
1636 */
1637 for (i = 0; i < vg->soc_data->npins; i++) {
1638 unsigned int pin = vg->soc_data->pins[i].number;
1639
1640 reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG);
1641 if (!reg) {
1642 dev_warn(&vg->pdev->dev,
1643 "Pin %i: could not retrieve conf0 register\n",
1644 i);
1645 continue;
1646 }
1647
1648 value = readl(reg);
1649 if (value & BYT_DIRECT_IRQ_EN) {
1650 clear_bit(i, gc->irq_valid_mask);
1651 dev_dbg(dev, "excluding GPIO %d from IRQ domain\n", i);
1652 } else if ((value & BYT_PIN_MUX) == byt_get_gpio_mux(vg, i)) {
1653 byt_gpio_clear_triggering(vg, i);
1654 dev_dbg(dev, "disabling GPIO %d\n", i);
1655 }
1656 }
1657
1658 /* clear interrupt status trigger registers */
1659 for (base = 0; base < vg->soc_data->npins; base += 32) {
1660 reg = byt_gpio_reg(vg, base, BYT_INT_STAT_REG);
1661
1662 if (!reg) {
1663 dev_warn(&vg->pdev->dev,
1664 "Pin %i: could not retrieve irq status reg\n",
1665 base);
1666 continue;
1667 }
1668
1669 writel(0xffffffff, reg);
1670 /* make sure trigger bits are cleared, if not then a pin
1671 might be misconfigured in bios */
1672 value = readl(reg);
1673 if (value)
1674 dev_err(&vg->pdev->dev,
1675 "GPIO interrupt error, pins misconfigured\n");
1676 }
1677 }
1678
1679 static int byt_gpio_probe(struct byt_gpio *vg)
1680 {
1681 struct gpio_chip *gc;
1682 struct resource *irq_rc;
1683 int ret;
1684
1685 /* Set up gpio chip */
1686 vg->chip = byt_gpio_chip;
1687 gc = &vg->chip;
1688 gc->label = dev_name(&vg->pdev->dev);
1689 gc->base = -1;
1690 gc->can_sleep = false;
1691 gc->parent = &vg->pdev->dev;
1692 gc->ngpio = vg->soc_data->npins;
1693 gc->irq_need_valid_mask = true;
1694
1695 #ifdef CONFIG_PM_SLEEP
1696 vg->saved_context = devm_kcalloc(&vg->pdev->dev, gc->ngpio,
1697 sizeof(*vg->saved_context), GFP_KERNEL);
1698 #endif
1699 ret = gpiochip_add_data(gc, vg);
1700 if (ret) {
1701 dev_err(&vg->pdev->dev, "failed adding byt-gpio chip\n");
1702 return ret;
1703 }
1704
1705 ret = gpiochip_add_pin_range(&vg->chip, dev_name(&vg->pdev->dev),
1706 0, 0, vg->soc_data->npins);
1707 if (ret) {
1708 dev_err(&vg->pdev->dev, "failed to add GPIO pin range\n");
1709 goto fail;
1710 }
1711
1712 /* set up interrupts */
1713 irq_rc = platform_get_resource(vg->pdev, IORESOURCE_IRQ, 0);
1714 if (irq_rc && irq_rc->start) {
1715 byt_gpio_irq_init_hw(vg);
1716 ret = gpiochip_irqchip_add(gc, &byt_irqchip, 0,
1717 handle_bad_irq, IRQ_TYPE_NONE);
1718 if (ret) {
1719 dev_err(&vg->pdev->dev, "failed to add irqchip\n");
1720 goto fail;
1721 }
1722
1723 gpiochip_set_chained_irqchip(gc, &byt_irqchip,
1724 (unsigned)irq_rc->start,
1725 byt_gpio_irq_handler);
1726 }
1727
1728 return ret;
1729
1730 fail:
1731 gpiochip_remove(&vg->chip);
1732
1733 return ret;
1734 }
1735
1736 static int byt_set_soc_data(struct byt_gpio *vg,
1737 const struct byt_pinctrl_soc_data *soc_data)
1738 {
1739 int i;
1740
1741 vg->soc_data = soc_data;
1742 vg->communities_copy = devm_kcalloc(&vg->pdev->dev,
1743 soc_data->ncommunities,
1744 sizeof(*vg->communities_copy),
1745 GFP_KERNEL);
1746 if (!vg->communities_copy)
1747 return -ENOMEM;
1748
1749 for (i = 0; i < soc_data->ncommunities; i++) {
1750 struct byt_community *comm = vg->communities_copy + i;
1751 struct resource *mem_rc;
1752
1753 *comm = vg->soc_data->communities[i];
1754
1755 mem_rc = platform_get_resource(vg->pdev, IORESOURCE_MEM, 0);
1756 comm->reg_base = devm_ioremap_resource(&vg->pdev->dev, mem_rc);
1757 if (IS_ERR(comm->reg_base))
1758 return PTR_ERR(comm->reg_base);
1759 }
1760
1761 return 0;
1762 }
1763
1764 static const struct acpi_device_id byt_gpio_acpi_match[] = {
1765 { "INT33B2", (kernel_ulong_t)byt_soc_data },
1766 { "INT33FC", (kernel_ulong_t)byt_soc_data },
1767 { }
1768 };
1769 MODULE_DEVICE_TABLE(acpi, byt_gpio_acpi_match);
1770
1771 static int byt_pinctrl_probe(struct platform_device *pdev)
1772 {
1773 const struct byt_pinctrl_soc_data *soc_data = NULL;
1774 const struct byt_pinctrl_soc_data **soc_table;
1775 const struct acpi_device_id *acpi_id;
1776 struct acpi_device *acpi_dev;
1777 struct byt_gpio *vg;
1778 int i, ret;
1779
1780 acpi_dev = ACPI_COMPANION(&pdev->dev);
1781 if (!acpi_dev)
1782 return -ENODEV;
1783
1784 acpi_id = acpi_match_device(byt_gpio_acpi_match, &pdev->dev);
1785 if (!acpi_id)
1786 return -ENODEV;
1787
1788 soc_table = (const struct byt_pinctrl_soc_data **)acpi_id->driver_data;
1789
1790 for (i = 0; soc_table[i]; i++) {
1791 if (!strcmp(acpi_dev->pnp.unique_id, soc_table[i]->uid)) {
1792 soc_data = soc_table[i];
1793 break;
1794 }
1795 }
1796
1797 if (!soc_data)
1798 return -ENODEV;
1799
1800 vg = devm_kzalloc(&pdev->dev, sizeof(*vg), GFP_KERNEL);
1801 if (!vg)
1802 return -ENOMEM;
1803
1804 vg->pdev = pdev;
1805 ret = byt_set_soc_data(vg, soc_data);
1806 if (ret) {
1807 dev_err(&pdev->dev, "failed to set soc data\n");
1808 return ret;
1809 }
1810
1811 vg->pctl_desc = byt_pinctrl_desc;
1812 vg->pctl_desc.name = dev_name(&pdev->dev);
1813 vg->pctl_desc.pins = vg->soc_data->pins;
1814 vg->pctl_desc.npins = vg->soc_data->npins;
1815
1816 vg->pctl_dev = pinctrl_register(&vg->pctl_desc, &pdev->dev, vg);
1817 if (IS_ERR(vg->pctl_dev)) {
1818 dev_err(&pdev->dev, "failed to register pinctrl driver\n");
1819 return PTR_ERR(vg->pctl_dev);
1820 }
1821
1822 raw_spin_lock_init(&vg->lock);
1823
1824 ret = byt_gpio_probe(vg);
1825 if (ret) {
1826 pinctrl_unregister(vg->pctl_dev);
1827 return ret;
1828 }
1829
1830 platform_set_drvdata(pdev, vg);
1831 pm_runtime_enable(&pdev->dev);
1832
1833 return 0;
1834 }
1835
1836 #ifdef CONFIG_PM_SLEEP
1837 static int byt_gpio_suspend(struct device *dev)
1838 {
1839 struct platform_device *pdev = to_platform_device(dev);
1840 struct byt_gpio *vg = platform_get_drvdata(pdev);
1841 int i;
1842
1843 for (i = 0; i < vg->soc_data->npins; i++) {
1844 void __iomem *reg;
1845 u32 value;
1846 unsigned int pin = vg->soc_data->pins[i].number;
1847
1848 reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG);
1849 if (!reg) {
1850 dev_warn(&vg->pdev->dev,
1851 "Pin %i: could not retrieve conf0 register\n",
1852 i);
1853 continue;
1854 }
1855 value = readl(reg) & BYT_CONF0_RESTORE_MASK;
1856 vg->saved_context[i].conf0 = value;
1857
1858 reg = byt_gpio_reg(vg, pin, BYT_VAL_REG);
1859 value = readl(reg) & BYT_VAL_RESTORE_MASK;
1860 vg->saved_context[i].val = value;
1861 }
1862
1863 return 0;
1864 }
1865
1866 static int byt_gpio_resume(struct device *dev)
1867 {
1868 struct platform_device *pdev = to_platform_device(dev);
1869 struct byt_gpio *vg = platform_get_drvdata(pdev);
1870 int i;
1871
1872 for (i = 0; i < vg->soc_data->npins; i++) {
1873 void __iomem *reg;
1874 u32 value;
1875 unsigned int pin = vg->soc_data->pins[i].number;
1876
1877 reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG);
1878 if (!reg) {
1879 dev_warn(&vg->pdev->dev,
1880 "Pin %i: could not retrieve conf0 register\n",
1881 i);
1882 continue;
1883 }
1884 value = readl(reg);
1885 if ((value & BYT_CONF0_RESTORE_MASK) !=
1886 vg->saved_context[i].conf0) {
1887 value &= ~BYT_CONF0_RESTORE_MASK;
1888 value |= vg->saved_context[i].conf0;
1889 writel(value, reg);
1890 dev_info(dev, "restored pin %d conf0 %#08x", i, value);
1891 }
1892
1893 reg = byt_gpio_reg(vg, pin, BYT_VAL_REG);
1894 value = readl(reg);
1895 if ((value & BYT_VAL_RESTORE_MASK) !=
1896 vg->saved_context[i].val) {
1897 u32 v;
1898
1899 v = value & ~BYT_VAL_RESTORE_MASK;
1900 v |= vg->saved_context[i].val;
1901 if (v != value) {
1902 writel(v, reg);
1903 dev_dbg(dev, "restored pin %d val %#08x\n",
1904 i, v);
1905 }
1906 }
1907 }
1908
1909 return 0;
1910 }
1911 #endif
1912
1913 #ifdef CONFIG_PM
1914 static int byt_gpio_runtime_suspend(struct device *dev)
1915 {
1916 return 0;
1917 }
1918
1919 static int byt_gpio_runtime_resume(struct device *dev)
1920 {
1921 return 0;
1922 }
1923 #endif
1924
1925 static const struct dev_pm_ops byt_gpio_pm_ops = {
1926 SET_LATE_SYSTEM_SLEEP_PM_OPS(byt_gpio_suspend, byt_gpio_resume)
1927 SET_RUNTIME_PM_OPS(byt_gpio_runtime_suspend, byt_gpio_runtime_resume,
1928 NULL)
1929 };
1930
1931 static struct platform_driver byt_gpio_driver = {
1932 .probe = byt_pinctrl_probe,
1933 .driver = {
1934 .name = "byt_gpio",
1935 .pm = &byt_gpio_pm_ops,
1936 .suppress_bind_attrs = true,
1937
1938 .acpi_match_table = ACPI_PTR(byt_gpio_acpi_match),
1939 },
1940 };
1941
1942 static int __init byt_gpio_init(void)
1943 {
1944 return platform_driver_register(&byt_gpio_driver);
1945 }
1946 subsys_initcall(byt_gpio_init);
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