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12#include <linux/bitops.h>
13#include <linux/err.h>
14#include <linux/io.h>
15#include <linux/module.h>
16#include <linux/platform_device.h>
17#include <linux/pinctrl/pinconf.h>
18#include <linux/pinctrl/pinconf-generic.h>
19#include <linux/pinctrl/pinctrl.h>
20#include <linux/pinctrl/pinmux.h>
21
22#include "pinctrl-intel.h"
23
24#define MRFLD_FAMILY_NR 64
25#define MRFLD_FAMILY_LEN 0x400
26
27#define SLEW_OFFSET 0x000
28#define BUFCFG_OFFSET 0x100
29#define MISC_OFFSET 0x300
30
31#define BUFCFG_PINMODE_SHIFT 0
32#define BUFCFG_PINMODE_MASK GENMASK(2, 0)
33#define BUFCFG_PINMODE_GPIO 0
34#define BUFCFG_PUPD_VAL_SHIFT 4
35#define BUFCFG_PUPD_VAL_MASK GENMASK(5, 4)
36#define BUFCFG_PUPD_VAL_2K 0
37#define BUFCFG_PUPD_VAL_20K 1
38#define BUFCFG_PUPD_VAL_50K 2
39#define BUFCFG_PUPD_VAL_910 3
40#define BUFCFG_PU_EN BIT(8)
41#define BUFCFG_PD_EN BIT(9)
42#define BUFCFG_Px_EN_MASK GENMASK(9, 8)
43#define BUFCFG_SLEWSEL BIT(10)
44#define BUFCFG_OVINEN BIT(12)
45#define BUFCFG_OVINEN_EN BIT(13)
46#define BUFCFG_OVINEN_MASK GENMASK(13, 12)
47#define BUFCFG_OVOUTEN BIT(14)
48#define BUFCFG_OVOUTEN_EN BIT(15)
49#define BUFCFG_OVOUTEN_MASK GENMASK(15, 14)
50#define BUFCFG_INDATAOV_VAL BIT(16)
51#define BUFCFG_INDATAOV_EN BIT(17)
52#define BUFCFG_INDATAOV_MASK GENMASK(17, 16)
53#define BUFCFG_OUTDATAOV_VAL BIT(18)
54#define BUFCFG_OUTDATAOV_EN BIT(19)
55#define BUFCFG_OUTDATAOV_MASK GENMASK(19, 18)
56#define BUFCFG_OD_EN BIT(21)
57
58
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63
64
65
66struct mrfld_family {
67 unsigned int barno;
68 unsigned int pin_base;
69 size_t npins;
70 bool protected;
71 void __iomem *regs;
72};
73
74#define MRFLD_FAMILY(b, s, e) \
75 { \
76 .barno = (b), \
77 .pin_base = (s), \
78 .npins = (e) - (s) + 1, \
79 }
80
81#define MRFLD_FAMILY_PROTECTED(b, s, e) \
82 { \
83 .barno = (b), \
84 .pin_base = (s), \
85 .npins = (e) - (s) + 1, \
86 .protected = true, \
87 }
88
89static const struct pinctrl_pin_desc mrfld_pins[] = {
90
91
92 PINCTRL_PIN(0, "ULPI_CLK"),
93 PINCTRL_PIN(1, "ULPI_D0"),
94 PINCTRL_PIN(2, "ULPI_D1"),
95 PINCTRL_PIN(3, "ULPI_D2"),
96 PINCTRL_PIN(4, "ULPI_D3"),
97 PINCTRL_PIN(5, "ULPI_D4"),
98 PINCTRL_PIN(6, "ULPI_D5"),
99 PINCTRL_PIN(7, "ULPI_D6"),
100 PINCTRL_PIN(8, "ULPI_D7"),
101 PINCTRL_PIN(9, "ULPI_DIR"),
102 PINCTRL_PIN(10, "ULPI_NXT"),
103 PINCTRL_PIN(11, "ULPI_REFCLK"),
104 PINCTRL_PIN(12, "ULPI_STP"),
105
106 PINCTRL_PIN(13, "EMMC_CLK"),
107 PINCTRL_PIN(14, "EMMC_CMD"),
108 PINCTRL_PIN(15, "EMMC_D0"),
109 PINCTRL_PIN(16, "EMMC_D1"),
110 PINCTRL_PIN(17, "EMMC_D2"),
111 PINCTRL_PIN(18, "EMMC_D3"),
112 PINCTRL_PIN(19, "EMMC_D4"),
113 PINCTRL_PIN(20, "EMMC_D5"),
114 PINCTRL_PIN(21, "EMMC_D6"),
115 PINCTRL_PIN(22, "EMMC_D7"),
116 PINCTRL_PIN(23, "EMMC_RST_N"),
117 PINCTRL_PIN(24, "GP154"),
118 PINCTRL_PIN(25, "GP155"),
119 PINCTRL_PIN(26, "GP156"),
120 PINCTRL_PIN(27, "GP157"),
121 PINCTRL_PIN(28, "GP158"),
122 PINCTRL_PIN(29, "GP159"),
123 PINCTRL_PIN(30, "GP160"),
124 PINCTRL_PIN(31, "GP161"),
125 PINCTRL_PIN(32, "GP162"),
126 PINCTRL_PIN(33, "GP163"),
127 PINCTRL_PIN(34, "GP97"),
128 PINCTRL_PIN(35, "GP14"),
129 PINCTRL_PIN(36, "GP15"),
130
131 PINCTRL_PIN(37, "GP77_SD_CD"),
132 PINCTRL_PIN(38, "GP78_SD_CLK"),
133 PINCTRL_PIN(39, "GP79_SD_CMD"),
134 PINCTRL_PIN(40, "GP80_SD_D0"),
135 PINCTRL_PIN(41, "GP81_SD_D1"),
136 PINCTRL_PIN(42, "GP82_SD_D2"),
137 PINCTRL_PIN(43, "GP83_SD_D3"),
138 PINCTRL_PIN(44, "GP84_SD_LS_CLK_FB"),
139 PINCTRL_PIN(45, "GP85_SD_LS_CMD_DIR"),
140 PINCTRL_PIN(46, "GP86_SD_LVL_D_DIR"),
141 PINCTRL_PIN(47, "GP88_SD_LS_SEL"),
142 PINCTRL_PIN(48, "GP87_SD_PD"),
143 PINCTRL_PIN(49, "GP89_SD_WP"),
144 PINCTRL_PIN(50, "GP90_SDIO_CLK"),
145 PINCTRL_PIN(51, "GP91_SDIO_CMD"),
146 PINCTRL_PIN(52, "GP92_SDIO_D0"),
147 PINCTRL_PIN(53, "GP93_SDIO_D1"),
148 PINCTRL_PIN(54, "GP94_SDIO_D2"),
149 PINCTRL_PIN(55, "GP95_SDIO_D3"),
150 PINCTRL_PIN(56, "GP96_SDIO_PD"),
151
152 PINCTRL_PIN(57, "HSI_ACDATA"),
153 PINCTRL_PIN(58, "HSI_ACFLAG"),
154 PINCTRL_PIN(59, "HSI_ACREADY"),
155 PINCTRL_PIN(60, "HSI_ACWAKE"),
156 PINCTRL_PIN(61, "HSI_CADATA"),
157 PINCTRL_PIN(62, "HSI_CAFLAG"),
158 PINCTRL_PIN(63, "HSI_CAREADY"),
159 PINCTRL_PIN(64, "HSI_CAWAKE"),
160
161 PINCTRL_PIN(65, "GP70"),
162 PINCTRL_PIN(66, "GP71"),
163 PINCTRL_PIN(67, "GP32_I2S_0_CLK"),
164 PINCTRL_PIN(68, "GP33_I2S_0_FS"),
165 PINCTRL_PIN(69, "GP34_I2S_0_RXD"),
166 PINCTRL_PIN(70, "GP35_I2S_0_TXD"),
167 PINCTRL_PIN(71, "GP36_I2S_1_CLK"),
168 PINCTRL_PIN(72, "GP37_I2S_1_FS"),
169 PINCTRL_PIN(73, "GP38_I2S_1_RXD"),
170 PINCTRL_PIN(74, "GP39_I2S_1_TXD"),
171 PINCTRL_PIN(75, "GP40_I2S_2_CLK"),
172 PINCTRL_PIN(76, "GP41_I2S_2_FS"),
173 PINCTRL_PIN(77, "GP42_I2S_2_RXD"),
174 PINCTRL_PIN(78, "GP43_I2S_2_TXD"),
175
176 PINCTRL_PIN(79, "GP120_SPI_3_CLK"),
177 PINCTRL_PIN(80, "GP121_SPI_3_SS"),
178 PINCTRL_PIN(81, "GP122_SPI_3_RXD"),
179 PINCTRL_PIN(82, "GP123_SPI_3_TXD"),
180 PINCTRL_PIN(83, "GP102_SPI_4_CLK"),
181 PINCTRL_PIN(84, "GP103_SPI_4_SS_0"),
182 PINCTRL_PIN(85, "GP104_SPI_4_SS_1"),
183 PINCTRL_PIN(86, "GP105_SPI_4_SS_2"),
184 PINCTRL_PIN(87, "GP106_SPI_4_SS_3"),
185 PINCTRL_PIN(88, "GP107_SPI_4_RXD"),
186 PINCTRL_PIN(89, "GP108_SPI_4_TXD"),
187 PINCTRL_PIN(90, "GP109_SPI_5_CLK"),
188 PINCTRL_PIN(91, "GP110_SPI_5_SS_0"),
189 PINCTRL_PIN(92, "GP111_SPI_5_SS_1"),
190 PINCTRL_PIN(93, "GP112_SPI_5_SS_2"),
191 PINCTRL_PIN(94, "GP113_SPI_5_SS_3"),
192 PINCTRL_PIN(95, "GP114_SPI_5_RXD"),
193 PINCTRL_PIN(96, "GP115_SPI_5_TXD"),
194 PINCTRL_PIN(97, "GP116_SPI_6_CLK"),
195 PINCTRL_PIN(98, "GP117_SPI_6_SS"),
196 PINCTRL_PIN(99, "GP118_SPI_6_RXD"),
197 PINCTRL_PIN(100, "GP119_SPI_6_TXD"),
198
199 PINCTRL_PIN(101, "GP19_I2C_1_SCL"),
200 PINCTRL_PIN(102, "GP20_I2C_1_SDA"),
201 PINCTRL_PIN(103, "GP21_I2C_2_SCL"),
202 PINCTRL_PIN(104, "GP22_I2C_2_SDA"),
203 PINCTRL_PIN(105, "GP17_I2C_3_SCL_HDMI"),
204 PINCTRL_PIN(106, "GP18_I2C_3_SDA_HDMI"),
205 PINCTRL_PIN(107, "GP23_I2C_4_SCL"),
206 PINCTRL_PIN(108, "GP24_I2C_4_SDA"),
207 PINCTRL_PIN(109, "GP25_I2C_5_SCL"),
208 PINCTRL_PIN(110, "GP26_I2C_5_SDA"),
209 PINCTRL_PIN(111, "GP27_I2C_6_SCL"),
210 PINCTRL_PIN(112, "GP28_I2C_6_SDA"),
211 PINCTRL_PIN(113, "GP29_I2C_7_SCL"),
212 PINCTRL_PIN(114, "GP30_I2C_7_SDA"),
213
214 PINCTRL_PIN(115, "GP124_UART_0_CTS"),
215 PINCTRL_PIN(116, "GP125_UART_0_RTS"),
216 PINCTRL_PIN(117, "GP126_UART_0_RX"),
217 PINCTRL_PIN(118, "GP127_UART_0_TX"),
218 PINCTRL_PIN(119, "GP128_UART_1_CTS"),
219 PINCTRL_PIN(120, "GP129_UART_1_RTS"),
220 PINCTRL_PIN(121, "GP130_UART_1_RX"),
221 PINCTRL_PIN(122, "GP131_UART_1_TX"),
222 PINCTRL_PIN(123, "GP132_UART_2_CTS"),
223 PINCTRL_PIN(124, "GP133_UART_2_RTS"),
224 PINCTRL_PIN(125, "GP134_UART_2_RX"),
225 PINCTRL_PIN(126, "GP135_UART_2_TX"),
226
227 PINCTRL_PIN(127, "GP177"),
228 PINCTRL_PIN(128, "GP178"),
229 PINCTRL_PIN(129, "GP179"),
230 PINCTRL_PIN(130, "GP180"),
231 PINCTRL_PIN(131, "GP181"),
232 PINCTRL_PIN(132, "GP182_PWM2"),
233 PINCTRL_PIN(133, "GP183_PWM3"),
234 PINCTRL_PIN(134, "GP184"),
235 PINCTRL_PIN(135, "GP185"),
236 PINCTRL_PIN(136, "GP186"),
237 PINCTRL_PIN(137, "GP187"),
238 PINCTRL_PIN(138, "GP188"),
239 PINCTRL_PIN(139, "GP189"),
240 PINCTRL_PIN(140, "GP64_FAST_INT0"),
241 PINCTRL_PIN(141, "GP65_FAST_INT1"),
242 PINCTRL_PIN(142, "GP66_FAST_INT2"),
243 PINCTRL_PIN(143, "GP67_FAST_INT3"),
244 PINCTRL_PIN(144, "GP12_PWM0"),
245 PINCTRL_PIN(145, "GP13_PWM1"),
246
247 PINCTRL_PIN(146, "GP0"),
248 PINCTRL_PIN(147, "GP1"),
249 PINCTRL_PIN(148, "GP2"),
250 PINCTRL_PIN(149, "GP3"),
251 PINCTRL_PIN(150, "GP4"),
252 PINCTRL_PIN(151, "GP5"),
253 PINCTRL_PIN(152, "GP6"),
254 PINCTRL_PIN(153, "GP7"),
255 PINCTRL_PIN(154, "GP8"),
256 PINCTRL_PIN(155, "GP9"),
257 PINCTRL_PIN(156, "GP10"),
258 PINCTRL_PIN(157, "GP11"),
259
260 PINCTRL_PIN(158, "GP137"),
261 PINCTRL_PIN(159, "GP138"),
262 PINCTRL_PIN(160, "GP139"),
263 PINCTRL_PIN(161, "GP140"),
264 PINCTRL_PIN(162, "GP141"),
265 PINCTRL_PIN(163, "GP142"),
266 PINCTRL_PIN(164, "GP16_HDMI_HPD"),
267 PINCTRL_PIN(165, "GP68_DSI_A_TE"),
268 PINCTRL_PIN(166, "GP69_DSI_C_TE"),
269 PINCTRL_PIN(167, "OSC_CLK_CTRL0"),
270 PINCTRL_PIN(168, "OSC_CLK_CTRL1"),
271 PINCTRL_PIN(169, "OSC_CLK0"),
272 PINCTRL_PIN(170, "OSC_CLK1"),
273 PINCTRL_PIN(171, "OSC_CLK2"),
274 PINCTRL_PIN(172, "OSC_CLK3"),
275 PINCTRL_PIN(173, "OSC_CLK4"),
276 PINCTRL_PIN(174, "RESETOUT"),
277 PINCTRL_PIN(175, "PMODE"),
278 PINCTRL_PIN(176, "PRDY"),
279 PINCTRL_PIN(177, "PREQ"),
280 PINCTRL_PIN(178, "GP190"),
281 PINCTRL_PIN(179, "GP191"),
282
283 PINCTRL_PIN(180, "I2C_0_SCL"),
284 PINCTRL_PIN(181, "I2C_0_SDA"),
285 PINCTRL_PIN(182, "IERR"),
286 PINCTRL_PIN(183, "JTAG_TCK"),
287 PINCTRL_PIN(184, "JTAG_TDI"),
288 PINCTRL_PIN(185, "JTAG_TDO"),
289 PINCTRL_PIN(186, "JTAG_TMS"),
290 PINCTRL_PIN(187, "JTAG_TRST"),
291 PINCTRL_PIN(188, "PROCHOT"),
292 PINCTRL_PIN(189, "RTC_CLK"),
293 PINCTRL_PIN(190, "SVID_ALERT"),
294 PINCTRL_PIN(191, "SVID_CLK"),
295 PINCTRL_PIN(192, "SVID_D"),
296 PINCTRL_PIN(193, "THERMTRIP"),
297 PINCTRL_PIN(194, "STANDBY"),
298
299 PINCTRL_PIN(195, "GP44"),
300 PINCTRL_PIN(196, "GP45"),
301 PINCTRL_PIN(197, "GP46"),
302 PINCTRL_PIN(198, "GP47"),
303 PINCTRL_PIN(199, "GP48"),
304 PINCTRL_PIN(200, "GP49"),
305 PINCTRL_PIN(201, "GP50"),
306 PINCTRL_PIN(202, "GP51"),
307 PINCTRL_PIN(203, "GP52"),
308 PINCTRL_PIN(204, "GP53"),
309 PINCTRL_PIN(205, "GP54"),
310 PINCTRL_PIN(206, "GP55"),
311 PINCTRL_PIN(207, "GP56"),
312 PINCTRL_PIN(208, "GP57"),
313 PINCTRL_PIN(209, "GP58"),
314 PINCTRL_PIN(210, "GP59"),
315 PINCTRL_PIN(211, "GP60"),
316 PINCTRL_PIN(212, "GP61"),
317 PINCTRL_PIN(213, "GP62"),
318 PINCTRL_PIN(214, "GP63"),
319
320 PINCTRL_PIN(215, "GP164"),
321 PINCTRL_PIN(216, "GP165"),
322 PINCTRL_PIN(217, "GP166"),
323 PINCTRL_PIN(218, "GP167"),
324 PINCTRL_PIN(219, "GP168_MJTAG_TCK"),
325 PINCTRL_PIN(220, "GP169_MJTAG_TDI"),
326 PINCTRL_PIN(221, "GP170_MJTAG_TDO"),
327 PINCTRL_PIN(222, "GP171_MJTAG_TMS"),
328 PINCTRL_PIN(223, "GP172_MJTAG_TRST"),
329 PINCTRL_PIN(224, "GP173"),
330 PINCTRL_PIN(225, "GP174"),
331 PINCTRL_PIN(226, "GP175"),
332 PINCTRL_PIN(227, "GP176"),
333
334 PINCTRL_PIN(228, "GP72_PTI_CLK"),
335 PINCTRL_PIN(229, "GP73_PTI_D0"),
336 PINCTRL_PIN(230, "GP74_PTI_D1"),
337 PINCTRL_PIN(231, "GP75_PTI_D2"),
338 PINCTRL_PIN(232, "GP76_PTI_D3"),
339
340
341
342};
343
344static const unsigned int mrfld_sdio_pins[] = { 50, 51, 52, 53, 54, 55, 56 };
345static const unsigned int mrfld_spi5_pins[] = { 90, 91, 92, 93, 94, 95, 96 };
346static const unsigned int mrfld_uart0_pins[] = { 124, 125, 126, 127 };
347static const unsigned int mrfld_uart1_pins[] = { 128, 129, 130, 131 };
348static const unsigned int mrfld_uart2_pins[] = { 132, 133, 134, 135 };
349static const unsigned int mrfld_pwm0_pins[] = { 144 };
350static const unsigned int mrfld_pwm1_pins[] = { 145 };
351static const unsigned int mrfld_pwm2_pins[] = { 132 };
352static const unsigned int mrfld_pwm3_pins[] = { 133 };
353
354static const struct intel_pingroup mrfld_groups[] = {
355 PIN_GROUP("sdio_grp", mrfld_sdio_pins, 1),
356 PIN_GROUP("spi5_grp", mrfld_spi5_pins, 1),
357 PIN_GROUP("uart0_grp", mrfld_uart0_pins, 1),
358 PIN_GROUP("uart1_grp", mrfld_uart1_pins, 1),
359 PIN_GROUP("uart2_grp", mrfld_uart2_pins, 1),
360 PIN_GROUP("pwm0_grp", mrfld_pwm0_pins, 1),
361 PIN_GROUP("pwm1_grp", mrfld_pwm1_pins, 1),
362 PIN_GROUP("pwm2_grp", mrfld_pwm2_pins, 1),
363 PIN_GROUP("pwm3_grp", mrfld_pwm3_pins, 1),
364};
365
366static const char * const mrfld_sdio_groups[] = { "sdio_grp" };
367static const char * const mrfld_spi5_groups[] = { "spi5_grp" };
368static const char * const mrfld_uart0_groups[] = { "uart0_grp" };
369static const char * const mrfld_uart1_groups[] = { "uart1_grp" };
370static const char * const mrfld_uart2_groups[] = { "uart2_grp" };
371static const char * const mrfld_pwm0_groups[] = { "pwm0_grp" };
372static const char * const mrfld_pwm1_groups[] = { "pwm1_grp" };
373static const char * const mrfld_pwm2_groups[] = { "pwm2_grp" };
374static const char * const mrfld_pwm3_groups[] = { "pwm3_grp" };
375
376static const struct intel_function mrfld_functions[] = {
377 FUNCTION("sdio", mrfld_sdio_groups),
378 FUNCTION("spi5", mrfld_spi5_groups),
379 FUNCTION("uart0", mrfld_uart0_groups),
380 FUNCTION("uart1", mrfld_uart1_groups),
381 FUNCTION("uart2", mrfld_uart2_groups),
382 FUNCTION("pwm0", mrfld_pwm0_groups),
383 FUNCTION("pwm1", mrfld_pwm1_groups),
384 FUNCTION("pwm2", mrfld_pwm2_groups),
385 FUNCTION("pwm3", mrfld_pwm3_groups),
386};
387
388static const struct mrfld_family mrfld_families[] = {
389 MRFLD_FAMILY(1, 0, 12),
390 MRFLD_FAMILY(2, 13, 36),
391 MRFLD_FAMILY(3, 37, 56),
392 MRFLD_FAMILY(4, 57, 64),
393 MRFLD_FAMILY(5, 65, 78),
394 MRFLD_FAMILY(6, 79, 100),
395 MRFLD_FAMILY_PROTECTED(7, 101, 114),
396 MRFLD_FAMILY(8, 115, 126),
397 MRFLD_FAMILY(9, 127, 145),
398 MRFLD_FAMILY(10, 146, 157),
399 MRFLD_FAMILY(11, 158, 179),
400 MRFLD_FAMILY_PROTECTED(12, 180, 194),
401 MRFLD_FAMILY(13, 195, 214),
402 MRFLD_FAMILY(14, 215, 227),
403 MRFLD_FAMILY(15, 228, 232),
404};
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418
419
420
421struct mrfld_pinctrl {
422 struct device *dev;
423 raw_spinlock_t lock;
424 struct pinctrl_desc pctldesc;
425 struct pinctrl_dev *pctldev;
426
427
428 const struct mrfld_family *families;
429 size_t nfamilies;
430 const struct intel_function *functions;
431 size_t nfunctions;
432 const struct intel_pingroup *groups;
433 size_t ngroups;
434 const struct pinctrl_pin_desc *pins;
435 size_t npins;
436};
437
438#define pin_to_bufno(f, p) ((p) - (f)->pin_base)
439
440static const struct mrfld_family *mrfld_get_family(struct mrfld_pinctrl *mp,
441 unsigned int pin)
442{
443 const struct mrfld_family *family;
444 unsigned int i;
445
446 for (i = 0; i < mp->nfamilies; i++) {
447 family = &mp->families[i];
448 if (pin >= family->pin_base &&
449 pin < family->pin_base + family->npins)
450 return family;
451 }
452
453 dev_warn(mp->dev, "failed to find family for pin %u\n", pin);
454 return NULL;
455}
456
457static bool mrfld_buf_available(struct mrfld_pinctrl *mp, unsigned int pin)
458{
459 const struct mrfld_family *family;
460
461 family = mrfld_get_family(mp, pin);
462 if (!family)
463 return false;
464
465 return !family->protected;
466}
467
468static void __iomem *mrfld_get_bufcfg(struct mrfld_pinctrl *mp, unsigned int pin)
469{
470 const struct mrfld_family *family;
471 unsigned int bufno;
472
473 family = mrfld_get_family(mp, pin);
474 if (!family)
475 return NULL;
476
477 bufno = pin_to_bufno(family, pin);
478 return family->regs + BUFCFG_OFFSET + bufno * 4;
479}
480
481static int mrfld_get_groups_count(struct pinctrl_dev *pctldev)
482{
483 struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
484
485 return mp->ngroups;
486}
487
488static const char *mrfld_get_group_name(struct pinctrl_dev *pctldev,
489 unsigned int group)
490{
491 struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
492
493 return mp->groups[group].name;
494}
495
496static int mrfld_get_group_pins(struct pinctrl_dev *pctldev, unsigned int group,
497 const unsigned int **pins, unsigned int *npins)
498{
499 struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
500
501 *pins = mp->groups[group].pins;
502 *npins = mp->groups[group].npins;
503 return 0;
504}
505
506static void mrfld_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
507 unsigned int pin)
508{
509 struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
510 void __iomem *bufcfg;
511 u32 value, mode;
512
513 if (!mrfld_buf_available(mp, pin)) {
514 seq_puts(s, "not available");
515 return;
516 }
517
518 bufcfg = mrfld_get_bufcfg(mp, pin);
519 value = readl(bufcfg);
520
521 mode = (value & BUFCFG_PINMODE_MASK) >> BUFCFG_PINMODE_SHIFT;
522 if (!mode)
523 seq_puts(s, "GPIO ");
524 else
525 seq_printf(s, "mode %d ", mode);
526
527 seq_printf(s, "0x%08x", value);
528}
529
530static const struct pinctrl_ops mrfld_pinctrl_ops = {
531 .get_groups_count = mrfld_get_groups_count,
532 .get_group_name = mrfld_get_group_name,
533 .get_group_pins = mrfld_get_group_pins,
534 .pin_dbg_show = mrfld_pin_dbg_show,
535};
536
537static int mrfld_get_functions_count(struct pinctrl_dev *pctldev)
538{
539 struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
540
541 return mp->nfunctions;
542}
543
544static const char *mrfld_get_function_name(struct pinctrl_dev *pctldev,
545 unsigned int function)
546{
547 struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
548
549 return mp->functions[function].name;
550}
551
552static int mrfld_get_function_groups(struct pinctrl_dev *pctldev,
553 unsigned int function,
554 const char * const **groups,
555 unsigned int * const ngroups)
556{
557 struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
558
559 *groups = mp->functions[function].groups;
560 *ngroups = mp->functions[function].ngroups;
561 return 0;
562}
563
564static void mrfld_update_bufcfg(struct mrfld_pinctrl *mp, unsigned int pin,
565 u32 bits, u32 mask)
566{
567 void __iomem *bufcfg;
568 u32 value;
569
570 bufcfg = mrfld_get_bufcfg(mp, pin);
571 value = readl(bufcfg);
572
573 value &= ~mask;
574 value |= bits & mask;
575
576 writel(value, bufcfg);
577}
578
579static int mrfld_pinmux_set_mux(struct pinctrl_dev *pctldev,
580 unsigned int function,
581 unsigned int group)
582{
583 struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
584 const struct intel_pingroup *grp = &mp->groups[group];
585 u32 bits = grp->mode << BUFCFG_PINMODE_SHIFT;
586 u32 mask = BUFCFG_PINMODE_MASK;
587 unsigned long flags;
588 unsigned int i;
589
590
591
592
593
594 for (i = 0; i < grp->npins; i++) {
595 if (!mrfld_buf_available(mp, grp->pins[i]))
596 return -EBUSY;
597 }
598
599
600 raw_spin_lock_irqsave(&mp->lock, flags);
601 for (i = 0; i < grp->npins; i++)
602 mrfld_update_bufcfg(mp, grp->pins[i], bits, mask);
603 raw_spin_unlock_irqrestore(&mp->lock, flags);
604
605 return 0;
606}
607
608static int mrfld_gpio_request_enable(struct pinctrl_dev *pctldev,
609 struct pinctrl_gpio_range *range,
610 unsigned int pin)
611{
612 struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
613 u32 bits = BUFCFG_PINMODE_GPIO << BUFCFG_PINMODE_SHIFT;
614 u32 mask = BUFCFG_PINMODE_MASK;
615 unsigned long flags;
616
617 if (!mrfld_buf_available(mp, pin))
618 return -EBUSY;
619
620 raw_spin_lock_irqsave(&mp->lock, flags);
621 mrfld_update_bufcfg(mp, pin, bits, mask);
622 raw_spin_unlock_irqrestore(&mp->lock, flags);
623
624 return 0;
625}
626
627static const struct pinmux_ops mrfld_pinmux_ops = {
628 .get_functions_count = mrfld_get_functions_count,
629 .get_function_name = mrfld_get_function_name,
630 .get_function_groups = mrfld_get_function_groups,
631 .set_mux = mrfld_pinmux_set_mux,
632 .gpio_request_enable = mrfld_gpio_request_enable,
633};
634
635static int mrfld_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
636 unsigned long *config)
637{
638 struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
639 enum pin_config_param param = pinconf_to_config_param(*config);
640 u32 value, term;
641 u16 arg = 0;
642
643 if (!mrfld_buf_available(mp, pin))
644 return -ENOTSUPP;
645
646 value = readl(mrfld_get_bufcfg(mp, pin));
647 term = (value & BUFCFG_PUPD_VAL_MASK) >> BUFCFG_PUPD_VAL_SHIFT;
648
649 switch (param) {
650 case PIN_CONFIG_BIAS_DISABLE:
651 if (value & BUFCFG_Px_EN_MASK)
652 return -EINVAL;
653 break;
654
655 case PIN_CONFIG_BIAS_PULL_UP:
656 if ((value & BUFCFG_Px_EN_MASK) != BUFCFG_PU_EN)
657 return -EINVAL;
658
659 switch (term) {
660 case BUFCFG_PUPD_VAL_910:
661 arg = 910;
662 break;
663 case BUFCFG_PUPD_VAL_2K:
664 arg = 2000;
665 break;
666 case BUFCFG_PUPD_VAL_20K:
667 arg = 20000;
668 break;
669 case BUFCFG_PUPD_VAL_50K:
670 arg = 50000;
671 break;
672 }
673
674 break;
675
676 case PIN_CONFIG_BIAS_PULL_DOWN:
677 if ((value & BUFCFG_Px_EN_MASK) != BUFCFG_PD_EN)
678 return -EINVAL;
679
680 switch (term) {
681 case BUFCFG_PUPD_VAL_910:
682 arg = 910;
683 break;
684 case BUFCFG_PUPD_VAL_2K:
685 arg = 2000;
686 break;
687 case BUFCFG_PUPD_VAL_20K:
688 arg = 20000;
689 break;
690 case BUFCFG_PUPD_VAL_50K:
691 arg = 50000;
692 break;
693 }
694
695 break;
696
697 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
698 if (!(value & BUFCFG_OD_EN))
699 return -EINVAL;
700 break;
701
702 case PIN_CONFIG_SLEW_RATE:
703 if (!(value & BUFCFG_SLEWSEL))
704 arg = 0;
705 else
706 arg = 1;
707 break;
708
709 default:
710 return -ENOTSUPP;
711 }
712
713 *config = pinconf_to_config_packed(param, arg);
714 return 0;
715}
716
717static int mrfld_config_set_pin(struct mrfld_pinctrl *mp, unsigned int pin,
718 unsigned long config)
719{
720 unsigned int param = pinconf_to_config_param(config);
721 unsigned int arg = pinconf_to_config_argument(config);
722 u32 bits = 0, mask = 0;
723 unsigned long flags;
724
725 switch (param) {
726 case PIN_CONFIG_BIAS_DISABLE:
727 mask |= BUFCFG_Px_EN_MASK | BUFCFG_PUPD_VAL_MASK;
728 break;
729
730 case PIN_CONFIG_BIAS_PULL_UP:
731 mask |= BUFCFG_Px_EN_MASK | BUFCFG_PUPD_VAL_MASK;
732 bits |= BUFCFG_PU_EN;
733
734 switch (arg) {
735 case 50000:
736 bits |= BUFCFG_PUPD_VAL_50K << BUFCFG_PUPD_VAL_SHIFT;
737 break;
738 case 20000:
739 bits |= BUFCFG_PUPD_VAL_20K << BUFCFG_PUPD_VAL_SHIFT;
740 break;
741 case 2000:
742 bits |= BUFCFG_PUPD_VAL_2K << BUFCFG_PUPD_VAL_SHIFT;
743 break;
744 default:
745 return -EINVAL;
746 }
747
748 break;
749
750 case PIN_CONFIG_BIAS_PULL_DOWN:
751 mask |= BUFCFG_Px_EN_MASK | BUFCFG_PUPD_VAL_MASK;
752 bits |= BUFCFG_PD_EN;
753
754 switch (arg) {
755 case 50000:
756 bits |= BUFCFG_PUPD_VAL_50K << BUFCFG_PUPD_VAL_SHIFT;
757 break;
758 case 20000:
759 bits |= BUFCFG_PUPD_VAL_20K << BUFCFG_PUPD_VAL_SHIFT;
760 break;
761 case 2000:
762 bits |= BUFCFG_PUPD_VAL_2K << BUFCFG_PUPD_VAL_SHIFT;
763 break;
764 default:
765 return -EINVAL;
766 }
767
768 break;
769
770 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
771 mask |= BUFCFG_OD_EN;
772 if (arg)
773 bits |= BUFCFG_OD_EN;
774 break;
775
776 case PIN_CONFIG_SLEW_RATE:
777 mask |= BUFCFG_SLEWSEL;
778 if (arg)
779 bits |= BUFCFG_SLEWSEL;
780 break;
781 }
782
783 raw_spin_lock_irqsave(&mp->lock, flags);
784 mrfld_update_bufcfg(mp, pin, bits, mask);
785 raw_spin_unlock_irqrestore(&mp->lock, flags);
786
787 return 0;
788}
789
790static int mrfld_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
791 unsigned long *configs, unsigned int nconfigs)
792{
793 struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
794 unsigned int i;
795 int ret;
796
797 for (i = 0; i < nconfigs; i++) {
798 switch (pinconf_to_config_param(configs[i])) {
799 case PIN_CONFIG_BIAS_DISABLE:
800 case PIN_CONFIG_BIAS_PULL_UP:
801 case PIN_CONFIG_BIAS_PULL_DOWN:
802 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
803 case PIN_CONFIG_SLEW_RATE:
804 ret = mrfld_config_set_pin(mp, pin, configs[i]);
805 if (ret)
806 return ret;
807 break;
808
809 default:
810 return -ENOTSUPP;
811 }
812 }
813
814 return 0;
815}
816
817static const struct pinconf_ops mrfld_pinconf_ops = {
818 .is_generic = true,
819 .pin_config_get = mrfld_config_get,
820 .pin_config_set = mrfld_config_set,
821};
822
823static const struct pinctrl_desc mrfld_pinctrl_desc = {
824 .pctlops = &mrfld_pinctrl_ops,
825 .pmxops = &mrfld_pinmux_ops,
826 .confops = &mrfld_pinconf_ops,
827 .owner = THIS_MODULE,
828};
829
830static int mrfld_pinctrl_probe(struct platform_device *pdev)
831{
832 struct mrfld_family *families;
833 struct mrfld_pinctrl *mp;
834 struct resource *mem;
835 void __iomem *regs;
836 size_t nfamilies;
837 unsigned int i;
838
839 mp = devm_kzalloc(&pdev->dev, sizeof(*mp), GFP_KERNEL);
840 if (!mp)
841 return -ENOMEM;
842
843 mp->dev = &pdev->dev;
844 raw_spin_lock_init(&mp->lock);
845
846 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
847 regs = devm_ioremap_resource(&pdev->dev, mem);
848 if (IS_ERR(regs))
849 return PTR_ERR(regs);
850
851
852
853
854
855 nfamilies = ARRAY_SIZE(mrfld_families),
856 families = devm_kmemdup(&pdev->dev, mrfld_families,
857 sizeof(mrfld_families),
858 GFP_KERNEL);
859 if (!families)
860 return -ENOMEM;
861
862
863 for (i = 0; i < nfamilies; i++) {
864 struct mrfld_family *family = &families[i];
865
866 family->regs = regs + family->barno * MRFLD_FAMILY_LEN;
867 }
868
869 mp->families = families;
870 mp->nfamilies = nfamilies;
871 mp->functions = mrfld_functions;
872 mp->nfunctions = ARRAY_SIZE(mrfld_functions);
873 mp->groups = mrfld_groups;
874 mp->ngroups = ARRAY_SIZE(mrfld_groups);
875 mp->pctldesc = mrfld_pinctrl_desc;
876 mp->pctldesc.name = dev_name(&pdev->dev);
877 mp->pctldesc.pins = mrfld_pins;
878 mp->pctldesc.npins = ARRAY_SIZE(mrfld_pins);
879
880 mp->pctldev = devm_pinctrl_register(&pdev->dev, &mp->pctldesc, mp);
881 if (IS_ERR(mp->pctldev)) {
882 dev_err(&pdev->dev, "failed to register pinctrl driver\n");
883 return PTR_ERR(mp->pctldev);
884 }
885
886 platform_set_drvdata(pdev, mp);
887 return 0;
888}
889
890static struct platform_driver mrfld_pinctrl_driver = {
891 .probe = mrfld_pinctrl_probe,
892 .driver = {
893 .name = "pinctrl-merrifield",
894 },
895};
896
897static int __init mrfld_pinctrl_init(void)
898{
899 return platform_driver_register(&mrfld_pinctrl_driver);
900}
901subsys_initcall(mrfld_pinctrl_init);
902
903static void __exit mrfld_pinctrl_exit(void)
904{
905 platform_driver_unregister(&mrfld_pinctrl_driver);
906}
907module_exit(mrfld_pinctrl_exit);
908
909MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
910MODULE_DESCRIPTION("Intel Merrifield SoC pinctrl driver");
911MODULE_LICENSE("GPL v2");
912MODULE_ALIAS("platform:pinctrl-merrifield");
913
