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6e08d6bb MW |
1 | /* |
2 | * Cherryview/Braswell pinctrl driver | |
3 | * | |
4 | * Copyright (C) 2014, Intel Corporation | |
5 | * Author: Mika Westerberg <mika.westerberg@linux.intel.com> | |
6 | * | |
7 | * This driver is based on the original Cherryview GPIO driver by | |
8 | * Ning Li <ning.li@intel.com> | |
9 | * Alan Cox <alan@linux.intel.com> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | */ | |
15 | ||
70365027 | 16 | #include <linux/dmi.h> |
6e08d6bb MW |
17 | #include <linux/kernel.h> |
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/types.h> | |
21 | #include <linux/gpio.h> | |
22 | #include <linux/gpio/driver.h> | |
23 | #include <linux/acpi.h> | |
24 | #include <linux/pinctrl/pinctrl.h> | |
25 | #include <linux/pinctrl/pinmux.h> | |
26 | #include <linux/pinctrl/pinconf.h> | |
27 | #include <linux/pinctrl/pinconf-generic.h> | |
28 | #include <linux/platform_device.h> | |
29 | ||
30 | #define CHV_INTSTAT 0x300 | |
31 | #define CHV_INTMASK 0x380 | |
32 | ||
33 | #define FAMILY_PAD_REGS_OFF 0x4400 | |
34 | #define FAMILY_PAD_REGS_SIZE 0x400 | |
35 | #define MAX_FAMILY_PAD_GPIO_NO 15 | |
36 | #define GPIO_REGS_SIZE 8 | |
37 | ||
38 | #define CHV_PADCTRL0 0x000 | |
39 | #define CHV_PADCTRL0_INTSEL_SHIFT 28 | |
40 | #define CHV_PADCTRL0_INTSEL_MASK (0xf << CHV_PADCTRL0_INTSEL_SHIFT) | |
41 | #define CHV_PADCTRL0_TERM_UP BIT(23) | |
42 | #define CHV_PADCTRL0_TERM_SHIFT 20 | |
43 | #define CHV_PADCTRL0_TERM_MASK (7 << CHV_PADCTRL0_TERM_SHIFT) | |
44 | #define CHV_PADCTRL0_TERM_20K 1 | |
45 | #define CHV_PADCTRL0_TERM_5K 2 | |
46 | #define CHV_PADCTRL0_TERM_1K 4 | |
47 | #define CHV_PADCTRL0_PMODE_SHIFT 16 | |
48 | #define CHV_PADCTRL0_PMODE_MASK (0xf << CHV_PADCTRL0_PMODE_SHIFT) | |
49 | #define CHV_PADCTRL0_GPIOEN BIT(15) | |
50 | #define CHV_PADCTRL0_GPIOCFG_SHIFT 8 | |
51 | #define CHV_PADCTRL0_GPIOCFG_MASK (7 << CHV_PADCTRL0_GPIOCFG_SHIFT) | |
52 | #define CHV_PADCTRL0_GPIOCFG_GPIO 0 | |
53 | #define CHV_PADCTRL0_GPIOCFG_GPO 1 | |
54 | #define CHV_PADCTRL0_GPIOCFG_GPI 2 | |
55 | #define CHV_PADCTRL0_GPIOCFG_HIZ 3 | |
56 | #define CHV_PADCTRL0_GPIOTXSTATE BIT(1) | |
57 | #define CHV_PADCTRL0_GPIORXSTATE BIT(0) | |
58 | ||
59 | #define CHV_PADCTRL1 0x004 | |
60 | #define CHV_PADCTRL1_CFGLOCK BIT(31) | |
61 | #define CHV_PADCTRL1_INVRXTX_SHIFT 4 | |
62 | #define CHV_PADCTRL1_INVRXTX_MASK (0xf << CHV_PADCTRL1_INVRXTX_SHIFT) | |
63 | #define CHV_PADCTRL1_INVRXTX_TXENABLE (2 << CHV_PADCTRL1_INVRXTX_SHIFT) | |
64 | #define CHV_PADCTRL1_ODEN BIT(3) | |
65 | #define CHV_PADCTRL1_INVRXTX_RXDATA (4 << CHV_PADCTRL1_INVRXTX_SHIFT) | |
66 | #define CHV_PADCTRL1_INTWAKECFG_MASK 7 | |
67 | #define CHV_PADCTRL1_INTWAKECFG_FALLING 1 | |
68 | #define CHV_PADCTRL1_INTWAKECFG_RISING 2 | |
69 | #define CHV_PADCTRL1_INTWAKECFG_BOTH 3 | |
70 | #define CHV_PADCTRL1_INTWAKECFG_LEVEL 4 | |
71 | ||
72 | /** | |
73 | * struct chv_alternate_function - A per group or per pin alternate function | |
74 | * @pin: Pin number (only used in per pin configs) | |
75 | * @mode: Mode the pin should be set in | |
76 | * @invert_oe: Invert OE for this pin | |
77 | */ | |
78 | struct chv_alternate_function { | |
79 | unsigned pin; | |
80 | u8 mode; | |
81 | bool invert_oe; | |
82 | }; | |
83 | ||
84 | /** | |
85 | * struct chv_pincgroup - describes a CHV pin group | |
86 | * @name: Name of the group | |
87 | * @pins: An array of pins in this group | |
88 | * @npins: Number of pins in this group | |
89 | * @altfunc: Alternate function applied to all pins in this group | |
90 | * @overrides: Alternate function override per pin or %NULL if not used | |
91 | * @noverrides: Number of per pin alternate function overrides if | |
92 | * @overrides != NULL. | |
93 | */ | |
94 | struct chv_pingroup { | |
95 | const char *name; | |
96 | const unsigned *pins; | |
97 | size_t npins; | |
98 | struct chv_alternate_function altfunc; | |
99 | const struct chv_alternate_function *overrides; | |
100 | size_t noverrides; | |
101 | }; | |
102 | ||
103 | /** | |
104 | * struct chv_function - A CHV pinmux function | |
105 | * @name: Name of the function | |
106 | * @groups: An array of groups for this function | |
107 | * @ngroups: Number of groups in @groups | |
108 | */ | |
109 | struct chv_function { | |
110 | const char *name; | |
111 | const char * const *groups; | |
112 | size_t ngroups; | |
113 | }; | |
114 | ||
115 | /** | |
116 | * struct chv_gpio_pinrange - A range of pins that can be used as GPIOs | |
117 | * @base: Start pin number | |
118 | * @npins: Number of pins in this range | |
119 | */ | |
120 | struct chv_gpio_pinrange { | |
121 | unsigned base; | |
122 | unsigned npins; | |
123 | }; | |
124 | ||
125 | /** | |
126 | * struct chv_community - A community specific configuration | |
127 | * @uid: ACPI _UID used to match the community | |
128 | * @pins: All pins in this community | |
129 | * @npins: Number of pins | |
130 | * @groups: All groups in this community | |
131 | * @ngroups: Number of groups | |
132 | * @functions: All functions in this community | |
133 | * @nfunctions: Number of functions | |
6e08d6bb MW |
134 | * @gpio_ranges: An array of GPIO ranges in this community |
135 | * @ngpio_ranges: Number of GPIO ranges | |
47c950d1 | 136 | * @nirqs: Total number of IRQs this community can generate |
6e08d6bb MW |
137 | */ |
138 | struct chv_community { | |
139 | const char *uid; | |
140 | const struct pinctrl_pin_desc *pins; | |
141 | size_t npins; | |
142 | const struct chv_pingroup *groups; | |
143 | size_t ngroups; | |
144 | const struct chv_function *functions; | |
145 | size_t nfunctions; | |
146 | const struct chv_gpio_pinrange *gpio_ranges; | |
147 | size_t ngpio_ranges; | |
47c950d1 | 148 | size_t nirqs; |
a0b02859 | 149 | acpi_adr_space_type acpi_space_id; |
6e08d6bb MW |
150 | }; |
151 | ||
9eb457b5 MW |
152 | struct chv_pin_context { |
153 | u32 padctrl0; | |
154 | u32 padctrl1; | |
155 | }; | |
156 | ||
6e08d6bb MW |
157 | /** |
158 | * struct chv_pinctrl - CHV pinctrl private structure | |
159 | * @dev: Pointer to the parent device | |
160 | * @pctldesc: Pin controller description | |
161 | * @pctldev: Pointer to the pin controller device | |
162 | * @chip: GPIO chip in this pin controller | |
05f77e19 | 163 | * @irqchip: IRQ chip in this pin controller |
6e08d6bb | 164 | * @regs: MMIO registers |
6e08d6bb MW |
165 | * @intr_lines: Stores mapping between 16 HW interrupt wires and GPIO |
166 | * offset (in GPIO number space) | |
167 | * @community: Community this pinctrl instance represents | |
168 | * | |
169 | * The first group in @groups is expected to contain all pins that can be | |
170 | * used as GPIOs. | |
171 | */ | |
172 | struct chv_pinctrl { | |
173 | struct device *dev; | |
174 | struct pinctrl_desc pctldesc; | |
175 | struct pinctrl_dev *pctldev; | |
176 | struct gpio_chip chip; | |
05f77e19 | 177 | struct irq_chip irqchip; |
6e08d6bb | 178 | void __iomem *regs; |
6e08d6bb MW |
179 | unsigned intr_lines[16]; |
180 | const struct chv_community *community; | |
9eb457b5 MW |
181 | u32 saved_intmask; |
182 | struct chv_pin_context *saved_pin_context; | |
6e08d6bb MW |
183 | }; |
184 | ||
6e08d6bb MW |
185 | #define ALTERNATE_FUNCTION(p, m, i) \ |
186 | { \ | |
187 | .pin = (p), \ | |
188 | .mode = (m), \ | |
189 | .invert_oe = (i), \ | |
190 | } | |
191 | ||
192 | #define PIN_GROUP(n, p, m, i) \ | |
193 | { \ | |
194 | .name = (n), \ | |
195 | .pins = (p), \ | |
196 | .npins = ARRAY_SIZE((p)), \ | |
197 | .altfunc.mode = (m), \ | |
198 | .altfunc.invert_oe = (i), \ | |
199 | } | |
200 | ||
201 | #define PIN_GROUP_WITH_OVERRIDE(n, p, m, i, o) \ | |
202 | { \ | |
203 | .name = (n), \ | |
204 | .pins = (p), \ | |
205 | .npins = ARRAY_SIZE((p)), \ | |
206 | .altfunc.mode = (m), \ | |
207 | .altfunc.invert_oe = (i), \ | |
208 | .overrides = (o), \ | |
209 | .noverrides = ARRAY_SIZE((o)), \ | |
210 | } | |
211 | ||
212 | #define FUNCTION(n, g) \ | |
213 | { \ | |
214 | .name = (n), \ | |
215 | .groups = (g), \ | |
216 | .ngroups = ARRAY_SIZE((g)), \ | |
217 | } | |
218 | ||
219 | #define GPIO_PINRANGE(start, end) \ | |
220 | { \ | |
221 | .base = (start), \ | |
222 | .npins = (end) - (start) + 1, \ | |
223 | } | |
224 | ||
225 | static const struct pinctrl_pin_desc southwest_pins[] = { | |
226 | PINCTRL_PIN(0, "FST_SPI_D2"), | |
227 | PINCTRL_PIN(1, "FST_SPI_D0"), | |
228 | PINCTRL_PIN(2, "FST_SPI_CLK"), | |
229 | PINCTRL_PIN(3, "FST_SPI_D3"), | |
230 | PINCTRL_PIN(4, "FST_SPI_CS1_B"), | |
231 | PINCTRL_PIN(5, "FST_SPI_D1"), | |
232 | PINCTRL_PIN(6, "FST_SPI_CS0_B"), | |
233 | PINCTRL_PIN(7, "FST_SPI_CS2_B"), | |
234 | ||
235 | PINCTRL_PIN(15, "UART1_RTS_B"), | |
236 | PINCTRL_PIN(16, "UART1_RXD"), | |
237 | PINCTRL_PIN(17, "UART2_RXD"), | |
238 | PINCTRL_PIN(18, "UART1_CTS_B"), | |
239 | PINCTRL_PIN(19, "UART2_RTS_B"), | |
240 | PINCTRL_PIN(20, "UART1_TXD"), | |
241 | PINCTRL_PIN(21, "UART2_TXD"), | |
242 | PINCTRL_PIN(22, "UART2_CTS_B"), | |
243 | ||
244 | PINCTRL_PIN(30, "MF_HDA_CLK"), | |
245 | PINCTRL_PIN(31, "MF_HDA_RSTB"), | |
246 | PINCTRL_PIN(32, "MF_HDA_SDIO"), | |
247 | PINCTRL_PIN(33, "MF_HDA_SDO"), | |
248 | PINCTRL_PIN(34, "MF_HDA_DOCKRSTB"), | |
249 | PINCTRL_PIN(35, "MF_HDA_SYNC"), | |
250 | PINCTRL_PIN(36, "MF_HDA_SDI1"), | |
251 | PINCTRL_PIN(37, "MF_HDA_DOCKENB"), | |
252 | ||
253 | PINCTRL_PIN(45, "I2C5_SDA"), | |
254 | PINCTRL_PIN(46, "I2C4_SDA"), | |
255 | PINCTRL_PIN(47, "I2C6_SDA"), | |
256 | PINCTRL_PIN(48, "I2C5_SCL"), | |
257 | PINCTRL_PIN(49, "I2C_NFC_SDA"), | |
258 | PINCTRL_PIN(50, "I2C4_SCL"), | |
259 | PINCTRL_PIN(51, "I2C6_SCL"), | |
260 | PINCTRL_PIN(52, "I2C_NFC_SCL"), | |
261 | ||
262 | PINCTRL_PIN(60, "I2C1_SDA"), | |
263 | PINCTRL_PIN(61, "I2C0_SDA"), | |
264 | PINCTRL_PIN(62, "I2C2_SDA"), | |
265 | PINCTRL_PIN(63, "I2C1_SCL"), | |
266 | PINCTRL_PIN(64, "I2C3_SDA"), | |
267 | PINCTRL_PIN(65, "I2C0_SCL"), | |
268 | PINCTRL_PIN(66, "I2C2_SCL"), | |
269 | PINCTRL_PIN(67, "I2C3_SCL"), | |
270 | ||
271 | PINCTRL_PIN(75, "SATA_GP0"), | |
272 | PINCTRL_PIN(76, "SATA_GP1"), | |
273 | PINCTRL_PIN(77, "SATA_LEDN"), | |
274 | PINCTRL_PIN(78, "SATA_GP2"), | |
275 | PINCTRL_PIN(79, "MF_SMB_ALERTB"), | |
276 | PINCTRL_PIN(80, "SATA_GP3"), | |
277 | PINCTRL_PIN(81, "MF_SMB_CLK"), | |
278 | PINCTRL_PIN(82, "MF_SMB_DATA"), | |
279 | ||
280 | PINCTRL_PIN(90, "PCIE_CLKREQ0B"), | |
281 | PINCTRL_PIN(91, "PCIE_CLKREQ1B"), | |
282 | PINCTRL_PIN(92, "GP_SSP_2_CLK"), | |
283 | PINCTRL_PIN(93, "PCIE_CLKREQ2B"), | |
284 | PINCTRL_PIN(94, "GP_SSP_2_RXD"), | |
285 | PINCTRL_PIN(95, "PCIE_CLKREQ3B"), | |
286 | PINCTRL_PIN(96, "GP_SSP_2_FS"), | |
287 | PINCTRL_PIN(97, "GP_SSP_2_TXD"), | |
288 | }; | |
289 | ||
290 | static const unsigned southwest_fspi_pins[] = { 0, 1, 2, 3, 4, 5, 6, 7 }; | |
291 | static const unsigned southwest_uart0_pins[] = { 16, 20 }; | |
292 | static const unsigned southwest_uart1_pins[] = { 15, 16, 18, 20 }; | |
293 | static const unsigned southwest_uart2_pins[] = { 17, 19, 21, 22 }; | |
294 | static const unsigned southwest_i2c0_pins[] = { 61, 65 }; | |
295 | static const unsigned southwest_hda_pins[] = { 30, 31, 32, 33, 34, 35, 36, 37 }; | |
296 | static const unsigned southwest_lpe_pins[] = { | |
297 | 30, 31, 32, 33, 34, 35, 36, 37, 92, 94, 96, 97, | |
298 | }; | |
299 | static const unsigned southwest_i2c1_pins[] = { 60, 63 }; | |
300 | static const unsigned southwest_i2c2_pins[] = { 62, 66 }; | |
301 | static const unsigned southwest_i2c3_pins[] = { 64, 67 }; | |
302 | static const unsigned southwest_i2c4_pins[] = { 46, 50 }; | |
303 | static const unsigned southwest_i2c5_pins[] = { 45, 48 }; | |
304 | static const unsigned southwest_i2c6_pins[] = { 47, 51 }; | |
305 | static const unsigned southwest_i2c_nfc_pins[] = { 49, 52 }; | |
306 | static const unsigned southwest_smbus_pins[] = { 79, 81, 82 }; | |
307 | static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 }; | |
308 | ||
309 | /* LPE I2S TXD pins need to have invert_oe set */ | |
310 | static const struct chv_alternate_function southwest_lpe_altfuncs[] = { | |
311 | ALTERNATE_FUNCTION(30, 1, true), | |
312 | ALTERNATE_FUNCTION(34, 1, true), | |
313 | ALTERNATE_FUNCTION(97, 1, true), | |
314 | }; | |
315 | ||
316 | /* | |
317 | * Two spi3 chipselects are available in different mode than the main spi3 | |
318 | * functionality, which is using mode 1. | |
319 | */ | |
320 | static const struct chv_alternate_function southwest_spi3_altfuncs[] = { | |
321 | ALTERNATE_FUNCTION(76, 3, false), | |
322 | ALTERNATE_FUNCTION(80, 3, false), | |
323 | }; | |
324 | ||
325 | static const struct chv_pingroup southwest_groups[] = { | |
326 | PIN_GROUP("uart0_grp", southwest_uart0_pins, 2, false), | |
327 | PIN_GROUP("uart1_grp", southwest_uart1_pins, 1, false), | |
328 | PIN_GROUP("uart2_grp", southwest_uart2_pins, 1, false), | |
329 | PIN_GROUP("hda_grp", southwest_hda_pins, 2, false), | |
330 | PIN_GROUP("i2c0_grp", southwest_i2c0_pins, 1, true), | |
331 | PIN_GROUP("i2c1_grp", southwest_i2c1_pins, 1, true), | |
332 | PIN_GROUP("i2c2_grp", southwest_i2c2_pins, 1, true), | |
333 | PIN_GROUP("i2c3_grp", southwest_i2c3_pins, 1, true), | |
334 | PIN_GROUP("i2c4_grp", southwest_i2c4_pins, 1, true), | |
335 | PIN_GROUP("i2c5_grp", southwest_i2c5_pins, 1, true), | |
336 | PIN_GROUP("i2c6_grp", southwest_i2c6_pins, 1, true), | |
337 | PIN_GROUP("i2c_nfc_grp", southwest_i2c_nfc_pins, 2, true), | |
338 | ||
339 | PIN_GROUP_WITH_OVERRIDE("lpe_grp", southwest_lpe_pins, 1, false, | |
340 | southwest_lpe_altfuncs), | |
341 | PIN_GROUP_WITH_OVERRIDE("spi3_grp", southwest_spi3_pins, 2, false, | |
342 | southwest_spi3_altfuncs), | |
343 | }; | |
344 | ||
345 | static const char * const southwest_uart0_groups[] = { "uart0_grp" }; | |
346 | static const char * const southwest_uart1_groups[] = { "uart1_grp" }; | |
347 | static const char * const southwest_uart2_groups[] = { "uart2_grp" }; | |
348 | static const char * const southwest_hda_groups[] = { "hda_grp" }; | |
349 | static const char * const southwest_lpe_groups[] = { "lpe_grp" }; | |
350 | static const char * const southwest_i2c0_groups[] = { "i2c0_grp" }; | |
351 | static const char * const southwest_i2c1_groups[] = { "i2c1_grp" }; | |
352 | static const char * const southwest_i2c2_groups[] = { "i2c2_grp" }; | |
353 | static const char * const southwest_i2c3_groups[] = { "i2c3_grp" }; | |
354 | static const char * const southwest_i2c4_groups[] = { "i2c4_grp" }; | |
355 | static const char * const southwest_i2c5_groups[] = { "i2c5_grp" }; | |
356 | static const char * const southwest_i2c6_groups[] = { "i2c6_grp" }; | |
357 | static const char * const southwest_i2c_nfc_groups[] = { "i2c_nfc_grp" }; | |
358 | static const char * const southwest_spi3_groups[] = { "spi3_grp" }; | |
359 | ||
360 | /* | |
361 | * Only do pinmuxing for certain LPSS devices for now. Rest of the pins are | |
362 | * enabled only as GPIOs. | |
363 | */ | |
364 | static const struct chv_function southwest_functions[] = { | |
365 | FUNCTION("uart0", southwest_uart0_groups), | |
366 | FUNCTION("uart1", southwest_uart1_groups), | |
367 | FUNCTION("uart2", southwest_uart2_groups), | |
368 | FUNCTION("hda", southwest_hda_groups), | |
369 | FUNCTION("lpe", southwest_lpe_groups), | |
370 | FUNCTION("i2c0", southwest_i2c0_groups), | |
371 | FUNCTION("i2c1", southwest_i2c1_groups), | |
372 | FUNCTION("i2c2", southwest_i2c2_groups), | |
373 | FUNCTION("i2c3", southwest_i2c3_groups), | |
374 | FUNCTION("i2c4", southwest_i2c4_groups), | |
375 | FUNCTION("i2c5", southwest_i2c5_groups), | |
376 | FUNCTION("i2c6", southwest_i2c6_groups), | |
377 | FUNCTION("i2c_nfc", southwest_i2c_nfc_groups), | |
378 | FUNCTION("spi3", southwest_spi3_groups), | |
379 | }; | |
380 | ||
381 | static const struct chv_gpio_pinrange southwest_gpio_ranges[] = { | |
382 | GPIO_PINRANGE(0, 7), | |
383 | GPIO_PINRANGE(15, 22), | |
384 | GPIO_PINRANGE(30, 37), | |
385 | GPIO_PINRANGE(45, 52), | |
386 | GPIO_PINRANGE(60, 67), | |
387 | GPIO_PINRANGE(75, 82), | |
388 | GPIO_PINRANGE(90, 97), | |
389 | }; | |
390 | ||
391 | static const struct chv_community southwest_community = { | |
392 | .uid = "1", | |
393 | .pins = southwest_pins, | |
394 | .npins = ARRAY_SIZE(southwest_pins), | |
395 | .groups = southwest_groups, | |
396 | .ngroups = ARRAY_SIZE(southwest_groups), | |
397 | .functions = southwest_functions, | |
398 | .nfunctions = ARRAY_SIZE(southwest_functions), | |
399 | .gpio_ranges = southwest_gpio_ranges, | |
400 | .ngpio_ranges = ARRAY_SIZE(southwest_gpio_ranges), | |
47c950d1 MW |
401 | /* |
402 | * Southwest community can benerate GPIO interrupts only for the | |
403 | * first 8 interrupts. The upper half (8-15) can only be used to | |
404 | * trigger GPEs. | |
405 | */ | |
406 | .nirqs = 8, | |
a0b02859 | 407 | .acpi_space_id = 0x91, |
6e08d6bb MW |
408 | }; |
409 | ||
410 | static const struct pinctrl_pin_desc north_pins[] = { | |
411 | PINCTRL_PIN(0, "GPIO_DFX_0"), | |
412 | PINCTRL_PIN(1, "GPIO_DFX_3"), | |
413 | PINCTRL_PIN(2, "GPIO_DFX_7"), | |
414 | PINCTRL_PIN(3, "GPIO_DFX_1"), | |
415 | PINCTRL_PIN(4, "GPIO_DFX_5"), | |
416 | PINCTRL_PIN(5, "GPIO_DFX_4"), | |
417 | PINCTRL_PIN(6, "GPIO_DFX_8"), | |
418 | PINCTRL_PIN(7, "GPIO_DFX_2"), | |
419 | PINCTRL_PIN(8, "GPIO_DFX_6"), | |
420 | ||
421 | PINCTRL_PIN(15, "GPIO_SUS0"), | |
422 | PINCTRL_PIN(16, "SEC_GPIO_SUS10"), | |
423 | PINCTRL_PIN(17, "GPIO_SUS3"), | |
424 | PINCTRL_PIN(18, "GPIO_SUS7"), | |
425 | PINCTRL_PIN(19, "GPIO_SUS1"), | |
426 | PINCTRL_PIN(20, "GPIO_SUS5"), | |
427 | PINCTRL_PIN(21, "SEC_GPIO_SUS11"), | |
428 | PINCTRL_PIN(22, "GPIO_SUS4"), | |
429 | PINCTRL_PIN(23, "SEC_GPIO_SUS8"), | |
430 | PINCTRL_PIN(24, "GPIO_SUS2"), | |
431 | PINCTRL_PIN(25, "GPIO_SUS6"), | |
432 | PINCTRL_PIN(26, "CX_PREQ_B"), | |
433 | PINCTRL_PIN(27, "SEC_GPIO_SUS9"), | |
434 | ||
435 | PINCTRL_PIN(30, "TRST_B"), | |
436 | PINCTRL_PIN(31, "TCK"), | |
437 | PINCTRL_PIN(32, "PROCHOT_B"), | |
438 | PINCTRL_PIN(33, "SVIDO_DATA"), | |
439 | PINCTRL_PIN(34, "TMS"), | |
440 | PINCTRL_PIN(35, "CX_PRDY_B_2"), | |
441 | PINCTRL_PIN(36, "TDO_2"), | |
442 | PINCTRL_PIN(37, "CX_PRDY_B"), | |
443 | PINCTRL_PIN(38, "SVIDO_ALERT_B"), | |
444 | PINCTRL_PIN(39, "TDO"), | |
445 | PINCTRL_PIN(40, "SVIDO_CLK"), | |
446 | PINCTRL_PIN(41, "TDI"), | |
447 | ||
448 | PINCTRL_PIN(45, "GP_CAMERASB_05"), | |
449 | PINCTRL_PIN(46, "GP_CAMERASB_02"), | |
450 | PINCTRL_PIN(47, "GP_CAMERASB_08"), | |
451 | PINCTRL_PIN(48, "GP_CAMERASB_00"), | |
452 | PINCTRL_PIN(49, "GP_CAMERASB_06"), | |
453 | PINCTRL_PIN(50, "GP_CAMERASB_10"), | |
454 | PINCTRL_PIN(51, "GP_CAMERASB_03"), | |
455 | PINCTRL_PIN(52, "GP_CAMERASB_09"), | |
456 | PINCTRL_PIN(53, "GP_CAMERASB_01"), | |
457 | PINCTRL_PIN(54, "GP_CAMERASB_07"), | |
458 | PINCTRL_PIN(55, "GP_CAMERASB_11"), | |
459 | PINCTRL_PIN(56, "GP_CAMERASB_04"), | |
460 | ||
461 | PINCTRL_PIN(60, "PANEL0_BKLTEN"), | |
462 | PINCTRL_PIN(61, "HV_DDI0_HPD"), | |
463 | PINCTRL_PIN(62, "HV_DDI2_DDC_SDA"), | |
464 | PINCTRL_PIN(63, "PANEL1_BKLTCTL"), | |
465 | PINCTRL_PIN(64, "HV_DDI1_HPD"), | |
466 | PINCTRL_PIN(65, "PANEL0_BKLTCTL"), | |
467 | PINCTRL_PIN(66, "HV_DDI0_DDC_SDA"), | |
468 | PINCTRL_PIN(67, "HV_DDI2_DDC_SCL"), | |
469 | PINCTRL_PIN(68, "HV_DDI2_HPD"), | |
470 | PINCTRL_PIN(69, "PANEL1_VDDEN"), | |
471 | PINCTRL_PIN(70, "PANEL1_BKLTEN"), | |
472 | PINCTRL_PIN(71, "HV_DDI0_DDC_SCL"), | |
473 | PINCTRL_PIN(72, "PANEL0_VDDEN"), | |
474 | }; | |
475 | ||
476 | static const struct chv_gpio_pinrange north_gpio_ranges[] = { | |
477 | GPIO_PINRANGE(0, 8), | |
478 | GPIO_PINRANGE(15, 27), | |
479 | GPIO_PINRANGE(30, 41), | |
480 | GPIO_PINRANGE(45, 56), | |
481 | GPIO_PINRANGE(60, 72), | |
482 | }; | |
483 | ||
484 | static const struct chv_community north_community = { | |
485 | .uid = "2", | |
486 | .pins = north_pins, | |
487 | .npins = ARRAY_SIZE(north_pins), | |
488 | .gpio_ranges = north_gpio_ranges, | |
489 | .ngpio_ranges = ARRAY_SIZE(north_gpio_ranges), | |
47c950d1 | 490 | /* |
505485a8 | 491 | * North community can generate GPIO interrupts only for the first |
47c950d1 MW |
492 | * 8 interrupts. The upper half (8-15) can only be used to trigger |
493 | * GPEs. | |
494 | */ | |
495 | .nirqs = 8, | |
a0b02859 | 496 | .acpi_space_id = 0x92, |
6e08d6bb MW |
497 | }; |
498 | ||
499 | static const struct pinctrl_pin_desc east_pins[] = { | |
500 | PINCTRL_PIN(0, "PMU_SLP_S3_B"), | |
501 | PINCTRL_PIN(1, "PMU_BATLOW_B"), | |
502 | PINCTRL_PIN(2, "SUS_STAT_B"), | |
503 | PINCTRL_PIN(3, "PMU_SLP_S0IX_B"), | |
504 | PINCTRL_PIN(4, "PMU_AC_PRESENT"), | |
505 | PINCTRL_PIN(5, "PMU_PLTRST_B"), | |
506 | PINCTRL_PIN(6, "PMU_SUSCLK"), | |
507 | PINCTRL_PIN(7, "PMU_SLP_LAN_B"), | |
508 | PINCTRL_PIN(8, "PMU_PWRBTN_B"), | |
509 | PINCTRL_PIN(9, "PMU_SLP_S4_B"), | |
510 | PINCTRL_PIN(10, "PMU_WAKE_B"), | |
511 | PINCTRL_PIN(11, "PMU_WAKE_LAN_B"), | |
512 | ||
513 | PINCTRL_PIN(15, "MF_ISH_GPIO_3"), | |
514 | PINCTRL_PIN(16, "MF_ISH_GPIO_7"), | |
515 | PINCTRL_PIN(17, "MF_ISH_I2C1_SCL"), | |
516 | PINCTRL_PIN(18, "MF_ISH_GPIO_1"), | |
517 | PINCTRL_PIN(19, "MF_ISH_GPIO_5"), | |
518 | PINCTRL_PIN(20, "MF_ISH_GPIO_9"), | |
519 | PINCTRL_PIN(21, "MF_ISH_GPIO_0"), | |
520 | PINCTRL_PIN(22, "MF_ISH_GPIO_4"), | |
521 | PINCTRL_PIN(23, "MF_ISH_GPIO_8"), | |
522 | PINCTRL_PIN(24, "MF_ISH_GPIO_2"), | |
523 | PINCTRL_PIN(25, "MF_ISH_GPIO_6"), | |
524 | PINCTRL_PIN(26, "MF_ISH_I2C1_SDA"), | |
525 | }; | |
526 | ||
527 | static const struct chv_gpio_pinrange east_gpio_ranges[] = { | |
528 | GPIO_PINRANGE(0, 11), | |
529 | GPIO_PINRANGE(15, 26), | |
530 | }; | |
531 | ||
532 | static const struct chv_community east_community = { | |
533 | .uid = "3", | |
534 | .pins = east_pins, | |
535 | .npins = ARRAY_SIZE(east_pins), | |
536 | .gpio_ranges = east_gpio_ranges, | |
537 | .ngpio_ranges = ARRAY_SIZE(east_gpio_ranges), | |
47c950d1 | 538 | .nirqs = 16, |
a0b02859 | 539 | .acpi_space_id = 0x93, |
6e08d6bb MW |
540 | }; |
541 | ||
542 | static const struct pinctrl_pin_desc southeast_pins[] = { | |
543 | PINCTRL_PIN(0, "MF_PLT_CLK0"), | |
544 | PINCTRL_PIN(1, "PWM1"), | |
545 | PINCTRL_PIN(2, "MF_PLT_CLK1"), | |
546 | PINCTRL_PIN(3, "MF_PLT_CLK4"), | |
547 | PINCTRL_PIN(4, "MF_PLT_CLK3"), | |
548 | PINCTRL_PIN(5, "PWM0"), | |
549 | PINCTRL_PIN(6, "MF_PLT_CLK5"), | |
550 | PINCTRL_PIN(7, "MF_PLT_CLK2"), | |
551 | ||
552 | PINCTRL_PIN(15, "SDMMC2_D3_CD_B"), | |
553 | PINCTRL_PIN(16, "SDMMC1_CLK"), | |
554 | PINCTRL_PIN(17, "SDMMC1_D0"), | |
555 | PINCTRL_PIN(18, "SDMMC2_D1"), | |
556 | PINCTRL_PIN(19, "SDMMC2_CLK"), | |
557 | PINCTRL_PIN(20, "SDMMC1_D2"), | |
558 | PINCTRL_PIN(21, "SDMMC2_D2"), | |
559 | PINCTRL_PIN(22, "SDMMC2_CMD"), | |
560 | PINCTRL_PIN(23, "SDMMC1_CMD"), | |
561 | PINCTRL_PIN(24, "SDMMC1_D1"), | |
562 | PINCTRL_PIN(25, "SDMMC2_D0"), | |
563 | PINCTRL_PIN(26, "SDMMC1_D3_CD_B"), | |
564 | ||
565 | PINCTRL_PIN(30, "SDMMC3_D1"), | |
566 | PINCTRL_PIN(31, "SDMMC3_CLK"), | |
567 | PINCTRL_PIN(32, "SDMMC3_D3"), | |
568 | PINCTRL_PIN(33, "SDMMC3_D2"), | |
569 | PINCTRL_PIN(34, "SDMMC3_CMD"), | |
570 | PINCTRL_PIN(35, "SDMMC3_D0"), | |
571 | ||
572 | PINCTRL_PIN(45, "MF_LPC_AD2"), | |
573 | PINCTRL_PIN(46, "LPC_CLKRUNB"), | |
574 | PINCTRL_PIN(47, "MF_LPC_AD0"), | |
575 | PINCTRL_PIN(48, "LPC_FRAMEB"), | |
576 | PINCTRL_PIN(49, "MF_LPC_CLKOUT1"), | |
577 | PINCTRL_PIN(50, "MF_LPC_AD3"), | |
578 | PINCTRL_PIN(51, "MF_LPC_CLKOUT0"), | |
579 | PINCTRL_PIN(52, "MF_LPC_AD1"), | |
580 | ||
581 | PINCTRL_PIN(60, "SPI1_MISO"), | |
582 | PINCTRL_PIN(61, "SPI1_CSO_B"), | |
583 | PINCTRL_PIN(62, "SPI1_CLK"), | |
584 | PINCTRL_PIN(63, "MMC1_D6"), | |
585 | PINCTRL_PIN(64, "SPI1_MOSI"), | |
586 | PINCTRL_PIN(65, "MMC1_D5"), | |
587 | PINCTRL_PIN(66, "SPI1_CS1_B"), | |
588 | PINCTRL_PIN(67, "MMC1_D4_SD_WE"), | |
589 | PINCTRL_PIN(68, "MMC1_D7"), | |
590 | PINCTRL_PIN(69, "MMC1_RCLK"), | |
591 | ||
592 | PINCTRL_PIN(75, "USB_OC1_B"), | |
593 | PINCTRL_PIN(76, "PMU_RESETBUTTON_B"), | |
594 | PINCTRL_PIN(77, "GPIO_ALERT"), | |
595 | PINCTRL_PIN(78, "SDMMC3_PWR_EN_B"), | |
596 | PINCTRL_PIN(79, "ILB_SERIRQ"), | |
597 | PINCTRL_PIN(80, "USB_OC0_B"), | |
598 | PINCTRL_PIN(81, "SDMMC3_CD_B"), | |
599 | PINCTRL_PIN(82, "SPKR"), | |
600 | PINCTRL_PIN(83, "SUSPWRDNACK"), | |
601 | PINCTRL_PIN(84, "SPARE_PIN"), | |
602 | PINCTRL_PIN(85, "SDMMC3_1P8_EN"), | |
603 | }; | |
604 | ||
605 | static const unsigned southeast_pwm0_pins[] = { 5 }; | |
606 | static const unsigned southeast_pwm1_pins[] = { 1 }; | |
607 | static const unsigned southeast_sdmmc1_pins[] = { | |
608 | 16, 17, 20, 23, 24, 26, 63, 65, 67, 68, 69, | |
609 | }; | |
610 | static const unsigned southeast_sdmmc2_pins[] = { 15, 18, 19, 21, 22, 25 }; | |
611 | static const unsigned southeast_sdmmc3_pins[] = { | |
612 | 30, 31, 32, 33, 34, 35, 78, 81, 85, | |
613 | }; | |
614 | static const unsigned southeast_spi1_pins[] = { 60, 61, 62, 64, 66 }; | |
615 | static const unsigned southeast_spi2_pins[] = { 2, 3, 4, 6, 7 }; | |
616 | ||
617 | static const struct chv_pingroup southeast_groups[] = { | |
618 | PIN_GROUP("pwm0_grp", southeast_pwm0_pins, 1, false), | |
619 | PIN_GROUP("pwm1_grp", southeast_pwm1_pins, 1, false), | |
620 | PIN_GROUP("sdmmc1_grp", southeast_sdmmc1_pins, 1, false), | |
621 | PIN_GROUP("sdmmc2_grp", southeast_sdmmc2_pins, 1, false), | |
622 | PIN_GROUP("sdmmc3_grp", southeast_sdmmc3_pins, 1, false), | |
623 | PIN_GROUP("spi1_grp", southeast_spi1_pins, 1, false), | |
624 | PIN_GROUP("spi2_grp", southeast_spi2_pins, 4, false), | |
625 | }; | |
626 | ||
627 | static const char * const southeast_pwm0_groups[] = { "pwm0_grp" }; | |
628 | static const char * const southeast_pwm1_groups[] = { "pwm1_grp" }; | |
629 | static const char * const southeast_sdmmc1_groups[] = { "sdmmc1_grp" }; | |
630 | static const char * const southeast_sdmmc2_groups[] = { "sdmmc2_grp" }; | |
631 | static const char * const southeast_sdmmc3_groups[] = { "sdmmc3_grp" }; | |
632 | static const char * const southeast_spi1_groups[] = { "spi1_grp" }; | |
633 | static const char * const southeast_spi2_groups[] = { "spi2_grp" }; | |
634 | ||
635 | static const struct chv_function southeast_functions[] = { | |
636 | FUNCTION("pwm0", southeast_pwm0_groups), | |
637 | FUNCTION("pwm1", southeast_pwm1_groups), | |
638 | FUNCTION("sdmmc1", southeast_sdmmc1_groups), | |
639 | FUNCTION("sdmmc2", southeast_sdmmc2_groups), | |
640 | FUNCTION("sdmmc3", southeast_sdmmc3_groups), | |
641 | FUNCTION("spi1", southeast_spi1_groups), | |
642 | FUNCTION("spi2", southeast_spi2_groups), | |
643 | }; | |
644 | ||
645 | static const struct chv_gpio_pinrange southeast_gpio_ranges[] = { | |
646 | GPIO_PINRANGE(0, 7), | |
647 | GPIO_PINRANGE(15, 26), | |
648 | GPIO_PINRANGE(30, 35), | |
649 | GPIO_PINRANGE(45, 52), | |
650 | GPIO_PINRANGE(60, 69), | |
651 | GPIO_PINRANGE(75, 85), | |
652 | }; | |
653 | ||
654 | static const struct chv_community southeast_community = { | |
655 | .uid = "4", | |
656 | .pins = southeast_pins, | |
657 | .npins = ARRAY_SIZE(southeast_pins), | |
658 | .groups = southeast_groups, | |
659 | .ngroups = ARRAY_SIZE(southeast_groups), | |
660 | .functions = southeast_functions, | |
661 | .nfunctions = ARRAY_SIZE(southeast_functions), | |
662 | .gpio_ranges = southeast_gpio_ranges, | |
663 | .ngpio_ranges = ARRAY_SIZE(southeast_gpio_ranges), | |
47c950d1 | 664 | .nirqs = 16, |
a0b02859 | 665 | .acpi_space_id = 0x94, |
6e08d6bb MW |
666 | }; |
667 | ||
668 | static const struct chv_community *chv_communities[] = { | |
669 | &southwest_community, | |
670 | &north_community, | |
671 | &east_community, | |
672 | &southeast_community, | |
673 | }; | |
674 | ||
0bd50d71 DD |
675 | /* |
676 | * Lock to serialize register accesses | |
677 | * | |
678 | * Due to a silicon issue, a shared lock must be used to prevent | |
679 | * concurrent accesses across the 4 GPIO controllers. | |
680 | * | |
681 | * See Intel Atom Z8000 Processor Series Specification Update (Rev. 005), | |
682 | * errata #CHT34, for further information. | |
683 | */ | |
684 | static DEFINE_RAW_SPINLOCK(chv_lock); | |
685 | ||
6e08d6bb MW |
686 | static void __iomem *chv_padreg(struct chv_pinctrl *pctrl, unsigned offset, |
687 | unsigned reg) | |
688 | { | |
689 | unsigned family_no = offset / MAX_FAMILY_PAD_GPIO_NO; | |
690 | unsigned pad_no = offset % MAX_FAMILY_PAD_GPIO_NO; | |
691 | ||
692 | offset = FAMILY_PAD_REGS_OFF + FAMILY_PAD_REGS_SIZE * family_no + | |
693 | GPIO_REGS_SIZE * pad_no; | |
694 | ||
695 | return pctrl->regs + offset + reg; | |
696 | } | |
697 | ||
698 | static void chv_writel(u32 value, void __iomem *reg) | |
699 | { | |
700 | writel(value, reg); | |
701 | /* simple readback to confirm the bus transferring done */ | |
702 | readl(reg); | |
703 | } | |
704 | ||
705 | /* When Pad Cfg is locked, driver can only change GPIOTXState or GPIORXState */ | |
706 | static bool chv_pad_locked(struct chv_pinctrl *pctrl, unsigned offset) | |
707 | { | |
708 | void __iomem *reg; | |
709 | ||
710 | reg = chv_padreg(pctrl, offset, CHV_PADCTRL1); | |
711 | return readl(reg) & CHV_PADCTRL1_CFGLOCK; | |
712 | } | |
713 | ||
714 | static int chv_get_groups_count(struct pinctrl_dev *pctldev) | |
715 | { | |
716 | struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); | |
717 | ||
718 | return pctrl->community->ngroups; | |
719 | } | |
720 | ||
721 | static const char *chv_get_group_name(struct pinctrl_dev *pctldev, | |
722 | unsigned group) | |
723 | { | |
724 | struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); | |
725 | ||
726 | return pctrl->community->groups[group].name; | |
727 | } | |
728 | ||
729 | static int chv_get_group_pins(struct pinctrl_dev *pctldev, unsigned group, | |
730 | const unsigned **pins, unsigned *npins) | |
731 | { | |
732 | struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); | |
733 | ||
734 | *pins = pctrl->community->groups[group].pins; | |
735 | *npins = pctrl->community->groups[group].npins; | |
736 | return 0; | |
737 | } | |
738 | ||
739 | static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, | |
740 | unsigned offset) | |
741 | { | |
742 | struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); | |
743 | unsigned long flags; | |
744 | u32 ctrl0, ctrl1; | |
745 | bool locked; | |
746 | ||
0bd50d71 | 747 | raw_spin_lock_irqsave(&chv_lock, flags); |
6e08d6bb MW |
748 | |
749 | ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0)); | |
750 | ctrl1 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL1)); | |
751 | locked = chv_pad_locked(pctrl, offset); | |
752 | ||
0bd50d71 | 753 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
754 | |
755 | if (ctrl0 & CHV_PADCTRL0_GPIOEN) { | |
756 | seq_puts(s, "GPIO "); | |
757 | } else { | |
758 | u32 mode; | |
759 | ||
760 | mode = ctrl0 & CHV_PADCTRL0_PMODE_MASK; | |
761 | mode >>= CHV_PADCTRL0_PMODE_SHIFT; | |
762 | ||
763 | seq_printf(s, "mode %d ", mode); | |
764 | } | |
765 | ||
684373ea | 766 | seq_printf(s, "0x%08x 0x%08x", ctrl0, ctrl1); |
6e08d6bb MW |
767 | |
768 | if (locked) | |
769 | seq_puts(s, " [LOCKED]"); | |
770 | } | |
771 | ||
772 | static const struct pinctrl_ops chv_pinctrl_ops = { | |
773 | .get_groups_count = chv_get_groups_count, | |
774 | .get_group_name = chv_get_group_name, | |
775 | .get_group_pins = chv_get_group_pins, | |
776 | .pin_dbg_show = chv_pin_dbg_show, | |
777 | }; | |
778 | ||
779 | static int chv_get_functions_count(struct pinctrl_dev *pctldev) | |
780 | { | |
781 | struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); | |
782 | ||
783 | return pctrl->community->nfunctions; | |
784 | } | |
785 | ||
786 | static const char *chv_get_function_name(struct pinctrl_dev *pctldev, | |
787 | unsigned function) | |
788 | { | |
789 | struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); | |
790 | ||
791 | return pctrl->community->functions[function].name; | |
792 | } | |
793 | ||
794 | static int chv_get_function_groups(struct pinctrl_dev *pctldev, | |
795 | unsigned function, | |
796 | const char * const **groups, | |
797 | unsigned * const ngroups) | |
798 | { | |
799 | struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); | |
800 | ||
801 | *groups = pctrl->community->functions[function].groups; | |
802 | *ngroups = pctrl->community->functions[function].ngroups; | |
803 | return 0; | |
804 | } | |
805 | ||
806 | static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned function, | |
807 | unsigned group) | |
808 | { | |
809 | struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); | |
810 | const struct chv_pingroup *grp; | |
811 | unsigned long flags; | |
812 | int i; | |
813 | ||
814 | grp = &pctrl->community->groups[group]; | |
815 | ||
0bd50d71 | 816 | raw_spin_lock_irqsave(&chv_lock, flags); |
6e08d6bb MW |
817 | |
818 | /* Check first that the pad is not locked */ | |
819 | for (i = 0; i < grp->npins; i++) { | |
820 | if (chv_pad_locked(pctrl, grp->pins[i])) { | |
821 | dev_warn(pctrl->dev, "unable to set mode for locked pin %u\n", | |
822 | grp->pins[i]); | |
0bd50d71 | 823 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
824 | return -EBUSY; |
825 | } | |
826 | } | |
827 | ||
828 | for (i = 0; i < grp->npins; i++) { | |
829 | const struct chv_alternate_function *altfunc = &grp->altfunc; | |
830 | int pin = grp->pins[i]; | |
831 | void __iomem *reg; | |
832 | u32 value; | |
833 | ||
834 | /* Check if there is pin-specific config */ | |
835 | if (grp->overrides) { | |
836 | int j; | |
837 | ||
838 | for (j = 0; j < grp->noverrides; j++) { | |
839 | if (grp->overrides[j].pin == pin) { | |
840 | altfunc = &grp->overrides[j]; | |
841 | break; | |
842 | } | |
843 | } | |
844 | } | |
845 | ||
846 | reg = chv_padreg(pctrl, pin, CHV_PADCTRL0); | |
847 | value = readl(reg); | |
848 | /* Disable GPIO mode */ | |
849 | value &= ~CHV_PADCTRL0_GPIOEN; | |
850 | /* Set to desired mode */ | |
851 | value &= ~CHV_PADCTRL0_PMODE_MASK; | |
852 | value |= altfunc->mode << CHV_PADCTRL0_PMODE_SHIFT; | |
853 | chv_writel(value, reg); | |
854 | ||
855 | /* Update for invert_oe */ | |
856 | reg = chv_padreg(pctrl, pin, CHV_PADCTRL1); | |
857 | value = readl(reg) & ~CHV_PADCTRL1_INVRXTX_MASK; | |
858 | if (altfunc->invert_oe) | |
859 | value |= CHV_PADCTRL1_INVRXTX_TXENABLE; | |
860 | chv_writel(value, reg); | |
861 | ||
862 | dev_dbg(pctrl->dev, "configured pin %u mode %u OE %sinverted\n", | |
863 | pin, altfunc->mode, altfunc->invert_oe ? "" : "not "); | |
864 | } | |
865 | ||
0bd50d71 | 866 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
867 | |
868 | return 0; | |
869 | } | |
870 | ||
871 | static int chv_gpio_request_enable(struct pinctrl_dev *pctldev, | |
872 | struct pinctrl_gpio_range *range, | |
873 | unsigned offset) | |
874 | { | |
875 | struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); | |
876 | unsigned long flags; | |
877 | void __iomem *reg; | |
878 | u32 value; | |
879 | ||
0bd50d71 | 880 | raw_spin_lock_irqsave(&chv_lock, flags); |
6e08d6bb MW |
881 | |
882 | if (chv_pad_locked(pctrl, offset)) { | |
883 | value = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0)); | |
884 | if (!(value & CHV_PADCTRL0_GPIOEN)) { | |
885 | /* Locked so cannot enable */ | |
0bd50d71 | 886 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
887 | return -EBUSY; |
888 | } | |
889 | } else { | |
890 | int i; | |
891 | ||
892 | /* Reset the interrupt mapping */ | |
893 | for (i = 0; i < ARRAY_SIZE(pctrl->intr_lines); i++) { | |
894 | if (pctrl->intr_lines[i] == offset) { | |
895 | pctrl->intr_lines[i] = 0; | |
896 | break; | |
897 | } | |
898 | } | |
899 | ||
900 | /* Disable interrupt generation */ | |
901 | reg = chv_padreg(pctrl, offset, CHV_PADCTRL1); | |
902 | value = readl(reg); | |
903 | value &= ~CHV_PADCTRL1_INTWAKECFG_MASK; | |
904 | value &= ~CHV_PADCTRL1_INVRXTX_MASK; | |
905 | chv_writel(value, reg); | |
906 | ||
6e08d6bb | 907 | reg = chv_padreg(pctrl, offset, CHV_PADCTRL0); |
2479c730 MW |
908 | value = readl(reg); |
909 | ||
910 | /* | |
911 | * If the pin is in HiZ mode (both TX and RX buffers are | |
912 | * disabled) we turn it to be input now. | |
913 | */ | |
914 | if ((value & CHV_PADCTRL0_GPIOCFG_MASK) == | |
915 | (CHV_PADCTRL0_GPIOCFG_HIZ << CHV_PADCTRL0_GPIOCFG_SHIFT)) { | |
916 | value &= ~CHV_PADCTRL0_GPIOCFG_MASK; | |
917 | value |= CHV_PADCTRL0_GPIOCFG_GPI << | |
918 | CHV_PADCTRL0_GPIOCFG_SHIFT; | |
919 | } | |
920 | ||
921 | /* Switch to a GPIO mode */ | |
922 | value |= CHV_PADCTRL0_GPIOEN; | |
6e08d6bb MW |
923 | chv_writel(value, reg); |
924 | } | |
925 | ||
0bd50d71 | 926 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
927 | |
928 | return 0; | |
929 | } | |
930 | ||
931 | static void chv_gpio_disable_free(struct pinctrl_dev *pctldev, | |
932 | struct pinctrl_gpio_range *range, | |
933 | unsigned offset) | |
934 | { | |
935 | struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); | |
936 | unsigned long flags; | |
937 | void __iomem *reg; | |
938 | u32 value; | |
939 | ||
0bd50d71 | 940 | raw_spin_lock_irqsave(&chv_lock, flags); |
6e08d6bb MW |
941 | |
942 | reg = chv_padreg(pctrl, offset, CHV_PADCTRL0); | |
943 | value = readl(reg) & ~CHV_PADCTRL0_GPIOEN; | |
944 | chv_writel(value, reg); | |
945 | ||
0bd50d71 | 946 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
947 | } |
948 | ||
949 | static int chv_gpio_set_direction(struct pinctrl_dev *pctldev, | |
950 | struct pinctrl_gpio_range *range, | |
951 | unsigned offset, bool input) | |
952 | { | |
953 | struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); | |
954 | void __iomem *reg = chv_padreg(pctrl, offset, CHV_PADCTRL0); | |
955 | unsigned long flags; | |
956 | u32 ctrl0; | |
957 | ||
0bd50d71 | 958 | raw_spin_lock_irqsave(&chv_lock, flags); |
6e08d6bb MW |
959 | |
960 | ctrl0 = readl(reg) & ~CHV_PADCTRL0_GPIOCFG_MASK; | |
961 | if (input) | |
962 | ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT; | |
963 | else | |
964 | ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPO << CHV_PADCTRL0_GPIOCFG_SHIFT; | |
965 | chv_writel(ctrl0, reg); | |
966 | ||
0bd50d71 | 967 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
968 | |
969 | return 0; | |
970 | } | |
971 | ||
972 | static const struct pinmux_ops chv_pinmux_ops = { | |
973 | .get_functions_count = chv_get_functions_count, | |
974 | .get_function_name = chv_get_function_name, | |
975 | .get_function_groups = chv_get_function_groups, | |
976 | .set_mux = chv_pinmux_set_mux, | |
977 | .gpio_request_enable = chv_gpio_request_enable, | |
978 | .gpio_disable_free = chv_gpio_disable_free, | |
979 | .gpio_set_direction = chv_gpio_set_direction, | |
980 | }; | |
981 | ||
982 | static int chv_config_get(struct pinctrl_dev *pctldev, unsigned pin, | |
983 | unsigned long *config) | |
984 | { | |
985 | struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); | |
986 | enum pin_config_param param = pinconf_to_config_param(*config); | |
987 | unsigned long flags; | |
988 | u32 ctrl0, ctrl1; | |
989 | u16 arg = 0; | |
990 | u32 term; | |
991 | ||
0bd50d71 | 992 | raw_spin_lock_irqsave(&chv_lock, flags); |
6e08d6bb MW |
993 | ctrl0 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0)); |
994 | ctrl1 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL1)); | |
0bd50d71 | 995 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
996 | |
997 | term = (ctrl0 & CHV_PADCTRL0_TERM_MASK) >> CHV_PADCTRL0_TERM_SHIFT; | |
998 | ||
999 | switch (param) { | |
1000 | case PIN_CONFIG_BIAS_DISABLE: | |
1001 | if (term) | |
1002 | return -EINVAL; | |
1003 | break; | |
1004 | ||
1005 | case PIN_CONFIG_BIAS_PULL_UP: | |
1006 | if (!(ctrl0 & CHV_PADCTRL0_TERM_UP)) | |
1007 | return -EINVAL; | |
1008 | ||
1009 | switch (term) { | |
1010 | case CHV_PADCTRL0_TERM_20K: | |
1011 | arg = 20000; | |
1012 | break; | |
1013 | case CHV_PADCTRL0_TERM_5K: | |
1014 | arg = 5000; | |
1015 | break; | |
1016 | case CHV_PADCTRL0_TERM_1K: | |
1017 | arg = 1000; | |
1018 | break; | |
1019 | } | |
1020 | ||
1021 | break; | |
1022 | ||
1023 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
1024 | if (!term || (ctrl0 & CHV_PADCTRL0_TERM_UP)) | |
1025 | return -EINVAL; | |
1026 | ||
1027 | switch (term) { | |
1028 | case CHV_PADCTRL0_TERM_20K: | |
1029 | arg = 20000; | |
1030 | break; | |
1031 | case CHV_PADCTRL0_TERM_5K: | |
1032 | arg = 5000; | |
1033 | break; | |
1034 | } | |
1035 | ||
1036 | break; | |
1037 | ||
1038 | case PIN_CONFIG_DRIVE_OPEN_DRAIN: | |
1039 | if (!(ctrl1 & CHV_PADCTRL1_ODEN)) | |
1040 | return -EINVAL; | |
1041 | break; | |
1042 | ||
1043 | case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: { | |
1044 | u32 cfg; | |
1045 | ||
1046 | cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; | |
1047 | cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT; | |
1048 | if (cfg != CHV_PADCTRL0_GPIOCFG_HIZ) | |
1049 | return -EINVAL; | |
1050 | ||
1051 | break; | |
1052 | } | |
1053 | ||
1054 | default: | |
1055 | return -ENOTSUPP; | |
1056 | } | |
1057 | ||
1058 | *config = pinconf_to_config_packed(param, arg); | |
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | static int chv_config_set_pull(struct chv_pinctrl *pctrl, unsigned pin, | |
58957d2e | 1063 | enum pin_config_param param, u32 arg) |
6e08d6bb MW |
1064 | { |
1065 | void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL0); | |
1066 | unsigned long flags; | |
1067 | u32 ctrl0, pull; | |
1068 | ||
0bd50d71 | 1069 | raw_spin_lock_irqsave(&chv_lock, flags); |
6e08d6bb MW |
1070 | ctrl0 = readl(reg); |
1071 | ||
1072 | switch (param) { | |
1073 | case PIN_CONFIG_BIAS_DISABLE: | |
1074 | ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); | |
1075 | break; | |
1076 | ||
1077 | case PIN_CONFIG_BIAS_PULL_UP: | |
1078 | ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); | |
1079 | ||
1080 | switch (arg) { | |
1081 | case 1000: | |
1082 | /* For 1k there is only pull up */ | |
1083 | pull = CHV_PADCTRL0_TERM_1K << CHV_PADCTRL0_TERM_SHIFT; | |
1084 | break; | |
1085 | case 5000: | |
1086 | pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT; | |
1087 | break; | |
1088 | case 20000: | |
1089 | pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT; | |
1090 | break; | |
1091 | default: | |
0bd50d71 | 1092 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
1093 | return -EINVAL; |
1094 | } | |
1095 | ||
1096 | ctrl0 |= CHV_PADCTRL0_TERM_UP | pull; | |
1097 | break; | |
1098 | ||
1099 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
1100 | ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); | |
1101 | ||
1102 | switch (arg) { | |
1103 | case 5000: | |
1104 | pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT; | |
1105 | break; | |
1106 | case 20000: | |
1107 | pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT; | |
1108 | break; | |
1109 | default: | |
0bd50d71 | 1110 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
1111 | return -EINVAL; |
1112 | } | |
1113 | ||
1114 | ctrl0 |= pull; | |
1115 | break; | |
1116 | ||
1117 | default: | |
0bd50d71 | 1118 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
1119 | return -EINVAL; |
1120 | } | |
1121 | ||
1122 | chv_writel(ctrl0, reg); | |
0bd50d71 | 1123 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
1124 | |
1125 | return 0; | |
1126 | } | |
1127 | ||
ccdf81d0 DD |
1128 | static int chv_config_set_oden(struct chv_pinctrl *pctrl, unsigned int pin, |
1129 | bool enable) | |
1130 | { | |
1131 | void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1); | |
1132 | unsigned long flags; | |
1133 | u32 ctrl1; | |
1134 | ||
1135 | raw_spin_lock_irqsave(&chv_lock, flags); | |
1136 | ctrl1 = readl(reg); | |
1137 | ||
1138 | if (enable) | |
1139 | ctrl1 |= CHV_PADCTRL1_ODEN; | |
1140 | else | |
1141 | ctrl1 &= ~CHV_PADCTRL1_ODEN; | |
1142 | ||
1143 | chv_writel(ctrl1, reg); | |
1144 | raw_spin_unlock_irqrestore(&chv_lock, flags); | |
1145 | ||
1146 | return 0; | |
1147 | } | |
1148 | ||
6e08d6bb MW |
1149 | static int chv_config_set(struct pinctrl_dev *pctldev, unsigned pin, |
1150 | unsigned long *configs, unsigned nconfigs) | |
1151 | { | |
1152 | struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); | |
1153 | enum pin_config_param param; | |
1154 | int i, ret; | |
58957d2e | 1155 | u32 arg; |
6e08d6bb MW |
1156 | |
1157 | if (chv_pad_locked(pctrl, pin)) | |
1158 | return -EBUSY; | |
1159 | ||
1160 | for (i = 0; i < nconfigs; i++) { | |
1161 | param = pinconf_to_config_param(configs[i]); | |
1162 | arg = pinconf_to_config_argument(configs[i]); | |
1163 | ||
1164 | switch (param) { | |
1165 | case PIN_CONFIG_BIAS_DISABLE: | |
1166 | case PIN_CONFIG_BIAS_PULL_UP: | |
1167 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
1168 | ret = chv_config_set_pull(pctrl, pin, param, arg); | |
1169 | if (ret) | |
1170 | return ret; | |
1171 | break; | |
1172 | ||
ccdf81d0 DD |
1173 | case PIN_CONFIG_DRIVE_PUSH_PULL: |
1174 | ret = chv_config_set_oden(pctrl, pin, false); | |
1175 | if (ret) | |
1176 | return ret; | |
1177 | break; | |
1178 | ||
1179 | case PIN_CONFIG_DRIVE_OPEN_DRAIN: | |
1180 | ret = chv_config_set_oden(pctrl, pin, true); | |
1181 | if (ret) | |
1182 | return ret; | |
1183 | break; | |
1184 | ||
6e08d6bb MW |
1185 | default: |
1186 | return -ENOTSUPP; | |
1187 | } | |
1188 | ||
1189 | dev_dbg(pctrl->dev, "pin %d set config %d arg %u\n", pin, | |
1190 | param, arg); | |
1191 | } | |
1192 | ||
1193 | return 0; | |
1194 | } | |
1195 | ||
77401d7f DD |
1196 | static int chv_config_group_get(struct pinctrl_dev *pctldev, |
1197 | unsigned int group, | |
1198 | unsigned long *config) | |
1199 | { | |
1200 | const unsigned int *pins; | |
1201 | unsigned int npins; | |
1202 | int ret; | |
1203 | ||
1204 | ret = chv_get_group_pins(pctldev, group, &pins, &npins); | |
1205 | if (ret) | |
1206 | return ret; | |
1207 | ||
1208 | ret = chv_config_get(pctldev, pins[0], config); | |
1209 | if (ret) | |
1210 | return ret; | |
1211 | ||
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | static int chv_config_group_set(struct pinctrl_dev *pctldev, | |
1216 | unsigned int group, unsigned long *configs, | |
1217 | unsigned int num_configs) | |
1218 | { | |
1219 | const unsigned int *pins; | |
1220 | unsigned int npins; | |
1221 | int i, ret; | |
1222 | ||
1223 | ret = chv_get_group_pins(pctldev, group, &pins, &npins); | |
1224 | if (ret) | |
1225 | return ret; | |
1226 | ||
1227 | for (i = 0; i < npins; i++) { | |
1228 | ret = chv_config_set(pctldev, pins[i], configs, num_configs); | |
1229 | if (ret) | |
1230 | return ret; | |
1231 | } | |
1232 | ||
1233 | return 0; | |
1234 | } | |
1235 | ||
6e08d6bb MW |
1236 | static const struct pinconf_ops chv_pinconf_ops = { |
1237 | .is_generic = true, | |
1238 | .pin_config_set = chv_config_set, | |
1239 | .pin_config_get = chv_config_get, | |
77401d7f DD |
1240 | .pin_config_group_get = chv_config_group_get, |
1241 | .pin_config_group_set = chv_config_group_set, | |
6e08d6bb MW |
1242 | }; |
1243 | ||
1244 | static struct pinctrl_desc chv_pinctrl_desc = { | |
1245 | .pctlops = &chv_pinctrl_ops, | |
1246 | .pmxops = &chv_pinmux_ops, | |
1247 | .confops = &chv_pinconf_ops, | |
1248 | .owner = THIS_MODULE, | |
1249 | }; | |
1250 | ||
6e08d6bb MW |
1251 | static int chv_gpio_get(struct gpio_chip *chip, unsigned offset) |
1252 | { | |
0587d3db | 1253 | struct chv_pinctrl *pctrl = gpiochip_get_data(chip); |
4585b000 | 1254 | unsigned long flags; |
6e08d6bb MW |
1255 | u32 ctrl0, cfg; |
1256 | ||
0bd50d71 | 1257 | raw_spin_lock_irqsave(&chv_lock, flags); |
85ef722e | 1258 | ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0)); |
0bd50d71 | 1259 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
1260 | |
1261 | cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; | |
1262 | cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT; | |
1263 | ||
1264 | if (cfg == CHV_PADCTRL0_GPIOCFG_GPO) | |
1265 | return !!(ctrl0 & CHV_PADCTRL0_GPIOTXSTATE); | |
1266 | return !!(ctrl0 & CHV_PADCTRL0_GPIORXSTATE); | |
1267 | } | |
1268 | ||
1269 | static void chv_gpio_set(struct gpio_chip *chip, unsigned offset, int value) | |
1270 | { | |
0587d3db | 1271 | struct chv_pinctrl *pctrl = gpiochip_get_data(chip); |
6e08d6bb MW |
1272 | unsigned long flags; |
1273 | void __iomem *reg; | |
1274 | u32 ctrl0; | |
1275 | ||
0bd50d71 | 1276 | raw_spin_lock_irqsave(&chv_lock, flags); |
6e08d6bb | 1277 | |
85ef722e | 1278 | reg = chv_padreg(pctrl, offset, CHV_PADCTRL0); |
6e08d6bb MW |
1279 | ctrl0 = readl(reg); |
1280 | ||
1281 | if (value) | |
1282 | ctrl0 |= CHV_PADCTRL0_GPIOTXSTATE; | |
1283 | else | |
1284 | ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE; | |
1285 | ||
1286 | chv_writel(ctrl0, reg); | |
1287 | ||
0bd50d71 | 1288 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
1289 | } |
1290 | ||
1291 | static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned offset) | |
1292 | { | |
0587d3db | 1293 | struct chv_pinctrl *pctrl = gpiochip_get_data(chip); |
6e08d6bb | 1294 | u32 ctrl0, direction; |
4585b000 | 1295 | unsigned long flags; |
6e08d6bb | 1296 | |
0bd50d71 | 1297 | raw_spin_lock_irqsave(&chv_lock, flags); |
85ef722e | 1298 | ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0)); |
0bd50d71 | 1299 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
1300 | |
1301 | direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; | |
1302 | direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT; | |
1303 | ||
1304 | return direction != CHV_PADCTRL0_GPIOCFG_GPO; | |
1305 | } | |
1306 | ||
1307 | static int chv_gpio_direction_input(struct gpio_chip *chip, unsigned offset) | |
1308 | { | |
1309 | return pinctrl_gpio_direction_input(chip->base + offset); | |
1310 | } | |
1311 | ||
1312 | static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned offset, | |
1313 | int value) | |
1314 | { | |
549e783f | 1315 | chv_gpio_set(chip, offset, value); |
6e08d6bb MW |
1316 | return pinctrl_gpio_direction_output(chip->base + offset); |
1317 | } | |
1318 | ||
1319 | static const struct gpio_chip chv_gpio_chip = { | |
1320 | .owner = THIS_MODULE, | |
98c85d58 JG |
1321 | .request = gpiochip_generic_request, |
1322 | .free = gpiochip_generic_free, | |
6e08d6bb MW |
1323 | .get_direction = chv_gpio_get_direction, |
1324 | .direction_input = chv_gpio_direction_input, | |
1325 | .direction_output = chv_gpio_direction_output, | |
1326 | .get = chv_gpio_get, | |
1327 | .set = chv_gpio_set, | |
1328 | }; | |
1329 | ||
1330 | static void chv_gpio_irq_ack(struct irq_data *d) | |
1331 | { | |
1332 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); | |
0587d3db | 1333 | struct chv_pinctrl *pctrl = gpiochip_get_data(gc); |
85ef722e | 1334 | int pin = irqd_to_hwirq(d); |
6e08d6bb MW |
1335 | u32 intr_line; |
1336 | ||
0bd50d71 | 1337 | raw_spin_lock(&chv_lock); |
6e08d6bb MW |
1338 | |
1339 | intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0)); | |
1340 | intr_line &= CHV_PADCTRL0_INTSEL_MASK; | |
1341 | intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT; | |
1342 | chv_writel(BIT(intr_line), pctrl->regs + CHV_INTSTAT); | |
1343 | ||
0bd50d71 | 1344 | raw_spin_unlock(&chv_lock); |
6e08d6bb MW |
1345 | } |
1346 | ||
1347 | static void chv_gpio_irq_mask_unmask(struct irq_data *d, bool mask) | |
1348 | { | |
1349 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); | |
0587d3db | 1350 | struct chv_pinctrl *pctrl = gpiochip_get_data(gc); |
85ef722e | 1351 | int pin = irqd_to_hwirq(d); |
6e08d6bb MW |
1352 | u32 value, intr_line; |
1353 | unsigned long flags; | |
1354 | ||
0bd50d71 | 1355 | raw_spin_lock_irqsave(&chv_lock, flags); |
6e08d6bb MW |
1356 | |
1357 | intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0)); | |
1358 | intr_line &= CHV_PADCTRL0_INTSEL_MASK; | |
1359 | intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT; | |
1360 | ||
1361 | value = readl(pctrl->regs + CHV_INTMASK); | |
1362 | if (mask) | |
1363 | value &= ~BIT(intr_line); | |
1364 | else | |
1365 | value |= BIT(intr_line); | |
1366 | chv_writel(value, pctrl->regs + CHV_INTMASK); | |
1367 | ||
0bd50d71 | 1368 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
1369 | } |
1370 | ||
1371 | static void chv_gpio_irq_mask(struct irq_data *d) | |
1372 | { | |
1373 | chv_gpio_irq_mask_unmask(d, true); | |
1374 | } | |
1375 | ||
1376 | static void chv_gpio_irq_unmask(struct irq_data *d) | |
1377 | { | |
1378 | chv_gpio_irq_mask_unmask(d, false); | |
1379 | } | |
1380 | ||
e6c906de MW |
1381 | static unsigned chv_gpio_irq_startup(struct irq_data *d) |
1382 | { | |
1383 | /* | |
1384 | * Check if the interrupt has been requested with 0 as triggering | |
1385 | * type. In that case it is assumed that the current values | |
1386 | * programmed to the hardware are used (e.g BIOS configured | |
1387 | * defaults). | |
1388 | * | |
1389 | * In that case ->irq_set_type() will never be called so we need to | |
1390 | * read back the values from hardware now, set correct flow handler | |
1391 | * and update mappings before the interrupt is being used. | |
1392 | */ | |
1393 | if (irqd_get_trigger_type(d) == IRQ_TYPE_NONE) { | |
1394 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); | |
0587d3db | 1395 | struct chv_pinctrl *pctrl = gpiochip_get_data(gc); |
85ef722e | 1396 | unsigned pin = irqd_to_hwirq(d); |
e6c906de MW |
1397 | irq_flow_handler_t handler; |
1398 | unsigned long flags; | |
1399 | u32 intsel, value; | |
1400 | ||
0bd50d71 | 1401 | raw_spin_lock_irqsave(&chv_lock, flags); |
e6c906de MW |
1402 | intsel = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0)); |
1403 | intsel &= CHV_PADCTRL0_INTSEL_MASK; | |
1404 | intsel >>= CHV_PADCTRL0_INTSEL_SHIFT; | |
1405 | ||
1406 | value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL1)); | |
1407 | if (value & CHV_PADCTRL1_INTWAKECFG_LEVEL) | |
1408 | handler = handle_level_irq; | |
1409 | else | |
1410 | handler = handle_edge_irq; | |
1411 | ||
e6c906de | 1412 | if (!pctrl->intr_lines[intsel]) { |
a4e3f783 | 1413 | irq_set_handler_locked(d, handler); |
85ef722e | 1414 | pctrl->intr_lines[intsel] = pin; |
e6c906de | 1415 | } |
0bd50d71 | 1416 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
e6c906de MW |
1417 | } |
1418 | ||
1419 | chv_gpio_irq_unmask(d); | |
1420 | return 0; | |
1421 | } | |
1422 | ||
6e08d6bb MW |
1423 | static int chv_gpio_irq_type(struct irq_data *d, unsigned type) |
1424 | { | |
1425 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); | |
0587d3db | 1426 | struct chv_pinctrl *pctrl = gpiochip_get_data(gc); |
85ef722e | 1427 | unsigned pin = irqd_to_hwirq(d); |
6e08d6bb MW |
1428 | unsigned long flags; |
1429 | u32 value; | |
1430 | ||
0bd50d71 | 1431 | raw_spin_lock_irqsave(&chv_lock, flags); |
6e08d6bb MW |
1432 | |
1433 | /* | |
1434 | * Pins which can be used as shared interrupt are configured in | |
1435 | * BIOS. Driver trusts BIOS configurations and assigns different | |
1436 | * handler according to the irq type. | |
1437 | * | |
1438 | * Driver needs to save the mapping between each pin and | |
1439 | * its interrupt line. | |
1440 | * 1. If the pin cfg is locked in BIOS: | |
1441 | * Trust BIOS has programmed IntWakeCfg bits correctly, | |
1442 | * driver just needs to save the mapping. | |
1443 | * 2. If the pin cfg is not locked in BIOS: | |
1444 | * Driver programs the IntWakeCfg bits and save the mapping. | |
1445 | */ | |
1446 | if (!chv_pad_locked(pctrl, pin)) { | |
1447 | void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1); | |
1448 | ||
1449 | value = readl(reg); | |
1450 | value &= ~CHV_PADCTRL1_INTWAKECFG_MASK; | |
1451 | value &= ~CHV_PADCTRL1_INVRXTX_MASK; | |
1452 | ||
1453 | if (type & IRQ_TYPE_EDGE_BOTH) { | |
1454 | if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) | |
1455 | value |= CHV_PADCTRL1_INTWAKECFG_BOTH; | |
1456 | else if (type & IRQ_TYPE_EDGE_RISING) | |
1457 | value |= CHV_PADCTRL1_INTWAKECFG_RISING; | |
1458 | else if (type & IRQ_TYPE_EDGE_FALLING) | |
1459 | value |= CHV_PADCTRL1_INTWAKECFG_FALLING; | |
1460 | } else if (type & IRQ_TYPE_LEVEL_MASK) { | |
1461 | value |= CHV_PADCTRL1_INTWAKECFG_LEVEL; | |
1462 | if (type & IRQ_TYPE_LEVEL_LOW) | |
1463 | value |= CHV_PADCTRL1_INVRXTX_RXDATA; | |
1464 | } | |
1465 | ||
1466 | chv_writel(value, reg); | |
1467 | } | |
1468 | ||
1469 | value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0)); | |
1470 | value &= CHV_PADCTRL0_INTSEL_MASK; | |
1471 | value >>= CHV_PADCTRL0_INTSEL_SHIFT; | |
1472 | ||
85ef722e | 1473 | pctrl->intr_lines[value] = pin; |
6e08d6bb MW |
1474 | |
1475 | if (type & IRQ_TYPE_EDGE_BOTH) | |
a4e3f783 | 1476 | irq_set_handler_locked(d, handle_edge_irq); |
6e08d6bb | 1477 | else if (type & IRQ_TYPE_LEVEL_MASK) |
a4e3f783 | 1478 | irq_set_handler_locked(d, handle_level_irq); |
6e08d6bb | 1479 | |
0bd50d71 | 1480 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
6e08d6bb MW |
1481 | |
1482 | return 0; | |
1483 | } | |
1484 | ||
bd0b9ac4 | 1485 | static void chv_gpio_irq_handler(struct irq_desc *desc) |
6e08d6bb MW |
1486 | { |
1487 | struct gpio_chip *gc = irq_desc_get_handler_data(desc); | |
0587d3db | 1488 | struct chv_pinctrl *pctrl = gpiochip_get_data(gc); |
5663bb27 | 1489 | struct irq_chip *chip = irq_desc_get_chip(desc); |
6e08d6bb MW |
1490 | unsigned long pending; |
1491 | u32 intr_line; | |
1492 | ||
1493 | chained_irq_enter(chip, desc); | |
1494 | ||
1495 | pending = readl(pctrl->regs + CHV_INTSTAT); | |
47c950d1 | 1496 | for_each_set_bit(intr_line, &pending, pctrl->community->nirqs) { |
6e08d6bb MW |
1497 | unsigned irq, offset; |
1498 | ||
1499 | offset = pctrl->intr_lines[intr_line]; | |
f0fbe7bc | 1500 | irq = irq_find_mapping(gc->irq.domain, offset); |
6e08d6bb MW |
1501 | generic_handle_irq(irq); |
1502 | } | |
1503 | ||
1504 | chained_irq_exit(chip, desc); | |
1505 | } | |
1506 | ||
70365027 MW |
1507 | /* |
1508 | * Certain machines seem to hardcode Linux IRQ numbers in their ACPI | |
1509 | * tables. Since we leave GPIOs that are not capable of generating | |
1510 | * interrupts out of the irqdomain the numbering will be different and | |
1511 | * cause devices using the hardcoded IRQ numbers fail. In order not to | |
1512 | * break such machines we will only mask pins from irqdomain if the machine | |
1513 | * is not listed below. | |
1514 | */ | |
1515 | static const struct dmi_system_id chv_no_valid_mask[] = { | |
2a8209fa | 1516 | /* See https://bugzilla.kernel.org/show_bug.cgi?id=194945 */ |
70365027 | 1517 | { |
2a8209fa | 1518 | .ident = "Intel_Strago based Chromebooks (All models)", |
70365027 MW |
1519 | .matches = { |
1520 | DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), | |
2a8209fa MW |
1521 | DMI_MATCH(DMI_PRODUCT_FAMILY, "Intel_Strago"), |
1522 | }, | |
1523 | }, | |
2d80bd3f AS |
1524 | { |
1525 | .ident = "HP Chromebook 11 G5 (Setzer)", | |
1526 | .matches = { | |
1527 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
1528 | DMI_MATCH(DMI_PRODUCT_NAME, "Setzer"), | |
1529 | }, | |
1530 | }, | |
2a8209fa MW |
1531 | { |
1532 | .ident = "Acer Chromebook R11 (Cyan)", | |
1533 | .matches = { | |
1534 | DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), | |
1535 | DMI_MATCH(DMI_PRODUCT_NAME, "Cyan"), | |
1536 | }, | |
1537 | }, | |
1538 | { | |
1539 | .ident = "Samsung Chromebook 3 (Celes)", | |
1540 | .matches = { | |
1541 | DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), | |
1542 | DMI_MATCH(DMI_PRODUCT_NAME, "Celes"), | |
70365027 | 1543 | }, |
a9de080b WY |
1544 | }, |
1545 | {} | |
70365027 MW |
1546 | }; |
1547 | ||
6e08d6bb MW |
1548 | static int chv_gpio_probe(struct chv_pinctrl *pctrl, int irq) |
1549 | { | |
1550 | const struct chv_gpio_pinrange *range; | |
1551 | struct gpio_chip *chip = &pctrl->chip; | |
70365027 | 1552 | bool need_valid_mask = !dmi_check_system(chv_no_valid_mask); |
85ef722e MW |
1553 | const struct chv_community *community = pctrl->community; |
1554 | int ret, i, irq_base; | |
6e08d6bb MW |
1555 | |
1556 | *chip = chv_gpio_chip; | |
1557 | ||
85ef722e | 1558 | chip->ngpio = community->pins[community->npins - 1].number + 1; |
6e08d6bb | 1559 | chip->label = dev_name(pctrl->dev); |
58383c78 | 1560 | chip->parent = pctrl->dev; |
6e08d6bb | 1561 | chip->base = -1; |
dc7b0387 | 1562 | chip->irq.need_valid_mask = need_valid_mask; |
6e08d6bb | 1563 | |
d1073418 | 1564 | ret = devm_gpiochip_add_data(pctrl->dev, chip, pctrl); |
6e08d6bb MW |
1565 | if (ret) { |
1566 | dev_err(pctrl->dev, "Failed to register gpiochip\n"); | |
1567 | return ret; | |
1568 | } | |
1569 | ||
85ef722e MW |
1570 | for (i = 0; i < community->ngpio_ranges; i++) { |
1571 | range = &community->gpio_ranges[i]; | |
1572 | ret = gpiochip_add_pin_range(chip, dev_name(pctrl->dev), | |
1573 | range->base, range->base, | |
1574 | range->npins); | |
6e08d6bb MW |
1575 | if (ret) { |
1576 | dev_err(pctrl->dev, "failed to add GPIO pin range\n"); | |
d1073418 | 1577 | return ret; |
6e08d6bb | 1578 | } |
6e08d6bb MW |
1579 | } |
1580 | ||
47c950d1 | 1581 | /* Do not add GPIOs that can only generate GPEs to the IRQ domain */ |
85ef722e | 1582 | for (i = 0; i < community->npins; i++) { |
47c950d1 MW |
1583 | const struct pinctrl_pin_desc *desc; |
1584 | u32 intsel; | |
1585 | ||
85ef722e | 1586 | desc = &community->pins[i]; |
47c950d1 MW |
1587 | |
1588 | intsel = readl(chv_padreg(pctrl, desc->number, CHV_PADCTRL0)); | |
1589 | intsel &= CHV_PADCTRL0_INTSEL_MASK; | |
1590 | intsel >>= CHV_PADCTRL0_INTSEL_SHIFT; | |
1591 | ||
85ef722e | 1592 | if (need_valid_mask && intsel >= community->nirqs) |
974d08a5 | 1593 | clear_bit(desc->number, chip->irq.valid_mask); |
47c950d1 MW |
1594 | } |
1595 | ||
d2b3c353 MW |
1596 | /* |
1597 | * The same set of machines in chv_no_valid_mask[] have incorrectly | |
1598 | * configured GPIOs that generate spurious interrupts so we use | |
1599 | * this same list to apply another quirk for them. | |
1600 | * | |
1601 | * See also https://bugzilla.kernel.org/show_bug.cgi?id=197953. | |
1602 | */ | |
1603 | if (!need_valid_mask) { | |
1604 | /* | |
1605 | * Mask all interrupts the community is able to generate | |
1606 | * but leave the ones that can only generate GPEs unmasked. | |
1607 | */ | |
1608 | chv_writel(GENMASK(31, pctrl->community->nirqs), | |
1609 | pctrl->regs + CHV_INTMASK); | |
1610 | } | |
1611 | ||
bcb48cca | 1612 | /* Clear all interrupts */ |
6e08d6bb MW |
1613 | chv_writel(0xffff, pctrl->regs + CHV_INTSTAT); |
1614 | ||
845e405e GS |
1615 | if (!need_valid_mask) { |
1616 | irq_base = devm_irq_alloc_descs(pctrl->dev, -1, 0, | |
1f6c5883 | 1617 | community->npins, NUMA_NO_NODE); |
845e405e GS |
1618 | if (irq_base < 0) { |
1619 | dev_err(pctrl->dev, "Failed to allocate IRQ numbers\n"); | |
1620 | return irq_base; | |
1621 | } | |
845e405e GS |
1622 | } |
1623 | ||
05f77e19 AS |
1624 | pctrl->irqchip.name = "chv-gpio"; |
1625 | pctrl->irqchip.irq_startup = chv_gpio_irq_startup; | |
1626 | pctrl->irqchip.irq_ack = chv_gpio_irq_ack; | |
1627 | pctrl->irqchip.irq_mask = chv_gpio_irq_mask; | |
1628 | pctrl->irqchip.irq_unmask = chv_gpio_irq_unmask; | |
1629 | pctrl->irqchip.irq_set_type = chv_gpio_irq_type; | |
1630 | pctrl->irqchip.flags = IRQCHIP_SKIP_SET_WAKE; | |
1631 | ||
1632 | ret = gpiochip_irqchip_add(chip, &pctrl->irqchip, 0, | |
bcb48cca | 1633 | handle_bad_irq, IRQ_TYPE_NONE); |
6e08d6bb MW |
1634 | if (ret) { |
1635 | dev_err(pctrl->dev, "failed to add IRQ chip\n"); | |
d1073418 | 1636 | return ret; |
6e08d6bb MW |
1637 | } |
1638 | ||
1f6c5883 MW |
1639 | if (!need_valid_mask) { |
1640 | for (i = 0; i < community->ngpio_ranges; i++) { | |
1641 | range = &community->gpio_ranges[i]; | |
1642 | ||
1643 | irq_domain_associate_many(chip->irq.domain, irq_base, | |
1644 | range->base, range->npins); | |
1645 | irq_base += range->npins; | |
1646 | } | |
1647 | } | |
1648 | ||
05f77e19 | 1649 | gpiochip_set_chained_irqchip(chip, &pctrl->irqchip, irq, |
6e08d6bb MW |
1650 | chv_gpio_irq_handler); |
1651 | return 0; | |
6e08d6bb MW |
1652 | } |
1653 | ||
a0b02859 HG |
1654 | static acpi_status chv_pinctrl_mmio_access_handler(u32 function, |
1655 | acpi_physical_address address, u32 bits, u64 *value, | |
1656 | void *handler_context, void *region_context) | |
1657 | { | |
1658 | struct chv_pinctrl *pctrl = region_context; | |
1659 | unsigned long flags; | |
1660 | acpi_status ret = AE_OK; | |
1661 | ||
1662 | raw_spin_lock_irqsave(&chv_lock, flags); | |
1663 | ||
1664 | if (function == ACPI_WRITE) | |
1665 | chv_writel((u32)(*value), pctrl->regs + (u32)address); | |
1666 | else if (function == ACPI_READ) | |
1667 | *value = readl(pctrl->regs + (u32)address); | |
1668 | else | |
1669 | ret = AE_BAD_PARAMETER; | |
1670 | ||
1671 | raw_spin_unlock_irqrestore(&chv_lock, flags); | |
1672 | ||
1673 | return ret; | |
1674 | } | |
1675 | ||
6e08d6bb MW |
1676 | static int chv_pinctrl_probe(struct platform_device *pdev) |
1677 | { | |
1678 | struct chv_pinctrl *pctrl; | |
1679 | struct acpi_device *adev; | |
1680 | struct resource *res; | |
a0b02859 | 1681 | acpi_status status; |
6e08d6bb MW |
1682 | int ret, irq, i; |
1683 | ||
1684 | adev = ACPI_COMPANION(&pdev->dev); | |
1685 | if (!adev) | |
1686 | return -ENODEV; | |
1687 | ||
1688 | pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL); | |
1689 | if (!pctrl) | |
1690 | return -ENOMEM; | |
1691 | ||
1692 | for (i = 0; i < ARRAY_SIZE(chv_communities); i++) | |
1693 | if (!strcmp(adev->pnp.unique_id, chv_communities[i]->uid)) { | |
1694 | pctrl->community = chv_communities[i]; | |
1695 | break; | |
1696 | } | |
1697 | if (i == ARRAY_SIZE(chv_communities)) | |
1698 | return -ENODEV; | |
1699 | ||
6e08d6bb MW |
1700 | pctrl->dev = &pdev->dev; |
1701 | ||
9eb457b5 MW |
1702 | #ifdef CONFIG_PM_SLEEP |
1703 | pctrl->saved_pin_context = devm_kcalloc(pctrl->dev, | |
1704 | pctrl->community->npins, sizeof(*pctrl->saved_pin_context), | |
1705 | GFP_KERNEL); | |
1706 | if (!pctrl->saved_pin_context) | |
1707 | return -ENOMEM; | |
1708 | #endif | |
1709 | ||
6e08d6bb MW |
1710 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1711 | pctrl->regs = devm_ioremap_resource(&pdev->dev, res); | |
1712 | if (IS_ERR(pctrl->regs)) | |
1713 | return PTR_ERR(pctrl->regs); | |
1714 | ||
1715 | irq = platform_get_irq(pdev, 0); | |
1716 | if (irq < 0) { | |
1717 | dev_err(&pdev->dev, "failed to get interrupt number\n"); | |
1718 | return irq; | |
1719 | } | |
1720 | ||
1721 | pctrl->pctldesc = chv_pinctrl_desc; | |
1722 | pctrl->pctldesc.name = dev_name(&pdev->dev); | |
1723 | pctrl->pctldesc.pins = pctrl->community->pins; | |
1724 | pctrl->pctldesc.npins = pctrl->community->npins; | |
1725 | ||
7cf061fa LD |
1726 | pctrl->pctldev = devm_pinctrl_register(&pdev->dev, &pctrl->pctldesc, |
1727 | pctrl); | |
323de9ef | 1728 | if (IS_ERR(pctrl->pctldev)) { |
6e08d6bb | 1729 | dev_err(&pdev->dev, "failed to register pinctrl driver\n"); |
323de9ef | 1730 | return PTR_ERR(pctrl->pctldev); |
6e08d6bb MW |
1731 | } |
1732 | ||
1733 | ret = chv_gpio_probe(pctrl, irq); | |
7cf061fa | 1734 | if (ret) |
6e08d6bb | 1735 | return ret; |
6e08d6bb | 1736 | |
a0b02859 HG |
1737 | status = acpi_install_address_space_handler(adev->handle, |
1738 | pctrl->community->acpi_space_id, | |
1739 | chv_pinctrl_mmio_access_handler, | |
1740 | NULL, pctrl); | |
1741 | if (ACPI_FAILURE(status)) | |
1742 | dev_err(&pdev->dev, "failed to install ACPI addr space handler\n"); | |
1743 | ||
6e08d6bb MW |
1744 | platform_set_drvdata(pdev, pctrl); |
1745 | ||
1746 | return 0; | |
1747 | } | |
1748 | ||
a0b02859 HG |
1749 | static int chv_pinctrl_remove(struct platform_device *pdev) |
1750 | { | |
1751 | struct chv_pinctrl *pctrl = platform_get_drvdata(pdev); | |
1752 | ||
1753 | acpi_remove_address_space_handler(ACPI_COMPANION(&pdev->dev), | |
1754 | pctrl->community->acpi_space_id, | |
1755 | chv_pinctrl_mmio_access_handler); | |
1756 | ||
1757 | return 0; | |
1758 | } | |
1759 | ||
9eb457b5 | 1760 | #ifdef CONFIG_PM_SLEEP |
d2cdf5dc | 1761 | static int chv_pinctrl_suspend_noirq(struct device *dev) |
9eb457b5 MW |
1762 | { |
1763 | struct platform_device *pdev = to_platform_device(dev); | |
1764 | struct chv_pinctrl *pctrl = platform_get_drvdata(pdev); | |
56211121 | 1765 | unsigned long flags; |
9eb457b5 MW |
1766 | int i; |
1767 | ||
56211121 MW |
1768 | raw_spin_lock_irqsave(&chv_lock, flags); |
1769 | ||
9eb457b5 MW |
1770 | pctrl->saved_intmask = readl(pctrl->regs + CHV_INTMASK); |
1771 | ||
1772 | for (i = 0; i < pctrl->community->npins; i++) { | |
1773 | const struct pinctrl_pin_desc *desc; | |
1774 | struct chv_pin_context *ctx; | |
1775 | void __iomem *reg; | |
1776 | ||
1777 | desc = &pctrl->community->pins[i]; | |
1778 | if (chv_pad_locked(pctrl, desc->number)) | |
1779 | continue; | |
1780 | ||
1781 | ctx = &pctrl->saved_pin_context[i]; | |
1782 | ||
1783 | reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0); | |
1784 | ctx->padctrl0 = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE; | |
1785 | ||
1786 | reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1); | |
1787 | ctx->padctrl1 = readl(reg); | |
1788 | } | |
1789 | ||
56211121 MW |
1790 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
1791 | ||
9eb457b5 MW |
1792 | return 0; |
1793 | } | |
1794 | ||
d2cdf5dc | 1795 | static int chv_pinctrl_resume_noirq(struct device *dev) |
9eb457b5 MW |
1796 | { |
1797 | struct platform_device *pdev = to_platform_device(dev); | |
1798 | struct chv_pinctrl *pctrl = platform_get_drvdata(pdev); | |
56211121 | 1799 | unsigned long flags; |
9eb457b5 MW |
1800 | int i; |
1801 | ||
56211121 MW |
1802 | raw_spin_lock_irqsave(&chv_lock, flags); |
1803 | ||
9eb457b5 MW |
1804 | /* |
1805 | * Mask all interrupts before restoring per-pin configuration | |
1806 | * registers because we don't know in which state BIOS left them | |
1807 | * upon exiting suspend. | |
1808 | */ | |
1809 | chv_writel(0, pctrl->regs + CHV_INTMASK); | |
1810 | ||
1811 | for (i = 0; i < pctrl->community->npins; i++) { | |
1812 | const struct pinctrl_pin_desc *desc; | |
1813 | const struct chv_pin_context *ctx; | |
1814 | void __iomem *reg; | |
1815 | u32 val; | |
1816 | ||
1817 | desc = &pctrl->community->pins[i]; | |
1818 | if (chv_pad_locked(pctrl, desc->number)) | |
1819 | continue; | |
1820 | ||
1821 | ctx = &pctrl->saved_pin_context[i]; | |
1822 | ||
1823 | /* Only restore if our saved state differs from the current */ | |
1824 | reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0); | |
1825 | val = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE; | |
1826 | if (ctx->padctrl0 != val) { | |
1827 | chv_writel(ctx->padctrl0, reg); | |
1828 | dev_dbg(pctrl->dev, "restored pin %2u ctrl0 0x%08x\n", | |
1829 | desc->number, readl(reg)); | |
1830 | } | |
1831 | ||
1832 | reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1); | |
1833 | val = readl(reg); | |
1834 | if (ctx->padctrl1 != val) { | |
1835 | chv_writel(ctx->padctrl1, reg); | |
1836 | dev_dbg(pctrl->dev, "restored pin %2u ctrl1 0x%08x\n", | |
1837 | desc->number, readl(reg)); | |
1838 | } | |
1839 | } | |
1840 | ||
1841 | /* | |
1842 | * Now that all pins are restored to known state, we can restore | |
1843 | * the interrupt mask register as well. | |
1844 | */ | |
1845 | chv_writel(0xffff, pctrl->regs + CHV_INTSTAT); | |
1846 | chv_writel(pctrl->saved_intmask, pctrl->regs + CHV_INTMASK); | |
1847 | ||
56211121 MW |
1848 | raw_spin_unlock_irqrestore(&chv_lock, flags); |
1849 | ||
9eb457b5 MW |
1850 | return 0; |
1851 | } | |
1852 | #endif | |
1853 | ||
1854 | static const struct dev_pm_ops chv_pinctrl_pm_ops = { | |
d2cdf5dc MW |
1855 | SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(chv_pinctrl_suspend_noirq, |
1856 | chv_pinctrl_resume_noirq) | |
9eb457b5 MW |
1857 | }; |
1858 | ||
6e08d6bb MW |
1859 | static const struct acpi_device_id chv_pinctrl_acpi_match[] = { |
1860 | { "INT33FF" }, | |
1861 | { } | |
1862 | }; | |
1863 | MODULE_DEVICE_TABLE(acpi, chv_pinctrl_acpi_match); | |
1864 | ||
1865 | static struct platform_driver chv_pinctrl_driver = { | |
1866 | .probe = chv_pinctrl_probe, | |
a0b02859 | 1867 | .remove = chv_pinctrl_remove, |
6e08d6bb MW |
1868 | .driver = { |
1869 | .name = "cherryview-pinctrl", | |
9eb457b5 | 1870 | .pm = &chv_pinctrl_pm_ops, |
6e08d6bb MW |
1871 | .acpi_match_table = chv_pinctrl_acpi_match, |
1872 | }, | |
1873 | }; | |
1874 | ||
1875 | static int __init chv_pinctrl_init(void) | |
1876 | { | |
1877 | return platform_driver_register(&chv_pinctrl_driver); | |
1878 | } | |
1879 | subsys_initcall(chv_pinctrl_init); | |
1880 | ||
1881 | static void __exit chv_pinctrl_exit(void) | |
1882 | { | |
1883 | platform_driver_unregister(&chv_pinctrl_driver); | |
1884 | } | |
1885 | module_exit(chv_pinctrl_exit); | |
1886 | ||
1887 | MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); | |
1888 | MODULE_DESCRIPTION("Intel Cherryview/Braswell pinctrl driver"); | |
1889 | MODULE_LICENSE("GPL v2"); |