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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2020 Sean Anderson <seanga2@gmail.com>
4 * Copyright (c) 2020 Western Digital Corporation or its affiliates.
5 */
6#include <linux/bitfield.h>
7#include <linux/clk.h>
8#include <linux/io.h>
9#include <linux/mfd/syscon.h>
10#include <linux/of.h>
11#include <linux/platform_device.h>
12#include <linux/regmap.h>
13#include <linux/seq_file.h>
14#include <linux/slab.h>
15
16#include <linux/pinctrl/pinconf-generic.h>
17#include <linux/pinctrl/pinconf.h>
18#include <linux/pinctrl/pinctrl.h>
19#include <linux/pinctrl/pinmux.h>
20
21#include <dt-bindings/pinctrl/k210-fpioa.h>
22
23#include "core.h"
24#include "pinconf.h"
25#include "pinctrl-utils.h"
26
27/*
28 * The K210 only implements 8 drive levels, even though
29 * there is register space for 16
30 */
31#define K210_PC_DRIVE_MASK GENMASK(11, 8)
32#define K210_PC_DRIVE_SHIFT 8
33#define K210_PC_DRIVE_0 (0 << K210_PC_DRIVE_SHIFT)
34#define K210_PC_DRIVE_1 (1 << K210_PC_DRIVE_SHIFT)
35#define K210_PC_DRIVE_2 (2 << K210_PC_DRIVE_SHIFT)
36#define K210_PC_DRIVE_3 (3 << K210_PC_DRIVE_SHIFT)
37#define K210_PC_DRIVE_4 (4 << K210_PC_DRIVE_SHIFT)
38#define K210_PC_DRIVE_5 (5 << K210_PC_DRIVE_SHIFT)
39#define K210_PC_DRIVE_6 (6 << K210_PC_DRIVE_SHIFT)
40#define K210_PC_DRIVE_7 (7 << K210_PC_DRIVE_SHIFT)
41#define K210_PC_DRIVE_MAX 7
42#define K210_PC_MODE_MASK GENMASK(23, 12)
43
44/*
45 * output enabled == PC_OE & (PC_OE_INV ^ FUNCTION_OE)
46 * where FUNCTION_OE is a physical signal from the function.
47 */
48#define K210_PC_OE BIT(12) /* Output Enable */
49#define K210_PC_OE_INV BIT(13) /* INVert Output Enable */
50#define K210_PC_DO_OE BIT(14) /* set Data Out to Output Enable sig */
51#define K210_PC_DO_INV BIT(15) /* INVert final Data Output */
52#define K210_PC_PU BIT(16) /* Pull Up */
53#define K210_PC_PD BIT(17) /* Pull Down */
54/* Strong pull up not implemented on K210 */
55#define K210_PC_SL BIT(19) /* reduce SLew rate */
56/* Same semantics as OE above */
57#define K210_PC_IE BIT(20) /* Input Enable */
58#define K210_PC_IE_INV BIT(21) /* INVert Input Enable */
59#define K210_PC_DI_INV BIT(22) /* INVert Data Input */
60#define K210_PC_ST BIT(23) /* Schmitt Trigger */
61#define K210_PC_DI BIT(31) /* raw Data Input */
62
63#define K210_PC_BIAS_MASK (K210_PC_PU & K210_PC_PD)
64
65#define K210_PC_MODE_IN (K210_PC_IE | K210_PC_ST)
66#define K210_PC_MODE_OUT (K210_PC_DRIVE_7 | K210_PC_OE)
67#define K210_PC_MODE_I2C (K210_PC_MODE_IN | K210_PC_SL | \
68 K210_PC_OE | K210_PC_PU)
69#define K210_PC_MODE_SCCB (K210_PC_MODE_I2C | \
70 K210_PC_OE_INV | K210_PC_IE_INV)
71#define K210_PC_MODE_SPI (K210_PC_MODE_IN | K210_PC_IE_INV | \
72 K210_PC_MODE_OUT | K210_PC_OE_INV)
73#define K210_PC_MODE_GPIO (K210_PC_MODE_IN | K210_PC_MODE_OUT)
74
75#define K210_PG_FUNC GENMASK(7, 0)
76#define K210_PG_DO BIT(8)
77#define K210_PG_PIN GENMASK(22, 16)
78
79/*
80 * struct k210_fpioa: Kendryte K210 FPIOA memory mapped registers
81 * @pins: 48 32-bits IO pin registers
82 * @tie_en: 256 (one per function) input tie enable bits
83 * @tie_val: 256 (one per function) input tie value bits
84 */
85struct k210_fpioa {
86 u32 pins[48];
87 u32 tie_en[8];
88 u32 tie_val[8];
89};
90
91struct k210_fpioa_data {
92
93 struct device *dev;
94 struct pinctrl_dev *pctl;
95
96 struct k210_fpioa __iomem *fpioa;
97 struct regmap *sysctl_map;
98 u32 power_offset;
99 struct clk *clk;
100 struct clk *pclk;
101};
102
103#define K210_PIN_NAME(i) ("IO_" #i)
104#define K210_PIN(i) [(i)] = PINCTRL_PIN((i), K210_PIN_NAME(i))
105
106static const struct pinctrl_pin_desc k210_pins[] = {
107 K210_PIN(0), K210_PIN(1), K210_PIN(2),
108 K210_PIN(3), K210_PIN(4), K210_PIN(5),
109 K210_PIN(6), K210_PIN(7), K210_PIN(8),
110 K210_PIN(9), K210_PIN(10), K210_PIN(11),
111 K210_PIN(12), K210_PIN(13), K210_PIN(14),
112 K210_PIN(15), K210_PIN(16), K210_PIN(17),
113 K210_PIN(18), K210_PIN(19), K210_PIN(20),
114 K210_PIN(21), K210_PIN(22), K210_PIN(23),
115 K210_PIN(24), K210_PIN(25), K210_PIN(26),
116 K210_PIN(27), K210_PIN(28), K210_PIN(29),
117 K210_PIN(30), K210_PIN(31), K210_PIN(32),
118 K210_PIN(33), K210_PIN(34), K210_PIN(35),
119 K210_PIN(36), K210_PIN(37), K210_PIN(38),
120 K210_PIN(39), K210_PIN(40), K210_PIN(41),
121 K210_PIN(42), K210_PIN(43), K210_PIN(44),
122 K210_PIN(45), K210_PIN(46), K210_PIN(47)
123};
124
125#define K210_NPINS ARRAY_SIZE(k210_pins)
126
127/*
128 * Pin groups: each of the 48 programmable pins is a group.
129 * To this are added 8 power domain groups, which for the purposes of
130 * the pin subsystem, contain no pins. The power domain groups only exist
131 * to set the power level. The id should never be used (since there are
132 * no pins 48-55).
133 */
134static const char *const k210_group_names[] = {
135 /* The first 48 groups are for pins, one each */
136 K210_PIN_NAME(0), K210_PIN_NAME(1), K210_PIN_NAME(2),
137 K210_PIN_NAME(3), K210_PIN_NAME(4), K210_PIN_NAME(5),
138 K210_PIN_NAME(6), K210_PIN_NAME(7), K210_PIN_NAME(8),
139 K210_PIN_NAME(9), K210_PIN_NAME(10), K210_PIN_NAME(11),
140 K210_PIN_NAME(12), K210_PIN_NAME(13), K210_PIN_NAME(14),
141 K210_PIN_NAME(15), K210_PIN_NAME(16), K210_PIN_NAME(17),
142 K210_PIN_NAME(18), K210_PIN_NAME(19), K210_PIN_NAME(20),
143 K210_PIN_NAME(21), K210_PIN_NAME(22), K210_PIN_NAME(23),
144 K210_PIN_NAME(24), K210_PIN_NAME(25), K210_PIN_NAME(26),
145 K210_PIN_NAME(27), K210_PIN_NAME(28), K210_PIN_NAME(29),
146 K210_PIN_NAME(30), K210_PIN_NAME(31), K210_PIN_NAME(32),
147 K210_PIN_NAME(33), K210_PIN_NAME(34), K210_PIN_NAME(35),
148 K210_PIN_NAME(36), K210_PIN_NAME(37), K210_PIN_NAME(38),
149 K210_PIN_NAME(39), K210_PIN_NAME(40), K210_PIN_NAME(41),
150 K210_PIN_NAME(42), K210_PIN_NAME(43), K210_PIN_NAME(44),
151 K210_PIN_NAME(45), K210_PIN_NAME(46), K210_PIN_NAME(47),
152 [48] = "A0", [49] = "A1", [50] = "A2",
153 [51] = "B3", [52] = "B4", [53] = "B5",
154 [54] = "C6", [55] = "C7"
155};
156
157#define K210_NGROUPS ARRAY_SIZE(k210_group_names)
158
159enum k210_pinctrl_mode_id {
160 K210_PC_DEFAULT_DISABLED,
161 K210_PC_DEFAULT_IN,
162 K210_PC_DEFAULT_IN_TIE,
163 K210_PC_DEFAULT_OUT,
164 K210_PC_DEFAULT_I2C,
165 K210_PC_DEFAULT_SCCB,
166 K210_PC_DEFAULT_SPI,
167 K210_PC_DEFAULT_GPIO,
168 K210_PC_DEFAULT_INT13,
169};
170
171#define K210_PC_DEFAULT(mode) \
172 [K210_PC_DEFAULT_##mode] = K210_PC_MODE_##mode
173
174static const u32 k210_pinconf_mode_id_to_mode[] = {
175 [K210_PC_DEFAULT_DISABLED] = 0,
176 K210_PC_DEFAULT(IN),
177 [K210_PC_DEFAULT_IN_TIE] = K210_PC_MODE_IN,
178 K210_PC_DEFAULT(OUT),
179 K210_PC_DEFAULT(I2C),
180 K210_PC_DEFAULT(SCCB),
181 K210_PC_DEFAULT(SPI),
182 K210_PC_DEFAULT(GPIO),
183 [K210_PC_DEFAULT_INT13] = K210_PC_MODE_IN | K210_PC_PU,
184};
185
186#undef DEFAULT
187
188/*
189 * Pin functions configuration information.
190 */
191struct k210_pcf_info {
192 char name[15];
193 u8 mode_id;
194};
195
196#define K210_FUNC(id, mode) \
197 [K210_PCF_##id] = { \
198 .name = #id, \
199 .mode_id = K210_PC_DEFAULT_##mode \
200 }
201
202static const struct k210_pcf_info k210_pcf_infos[] = {
203 K210_FUNC(JTAG_TCLK, IN),
204 K210_FUNC(JTAG_TDI, IN),
205 K210_FUNC(JTAG_TMS, IN),
206 K210_FUNC(JTAG_TDO, OUT),
207 K210_FUNC(SPI0_D0, SPI),
208 K210_FUNC(SPI0_D1, SPI),
209 K210_FUNC(SPI0_D2, SPI),
210 K210_FUNC(SPI0_D3, SPI),
211 K210_FUNC(SPI0_D4, SPI),
212 K210_FUNC(SPI0_D5, SPI),
213 K210_FUNC(SPI0_D6, SPI),
214 K210_FUNC(SPI0_D7, SPI),
215 K210_FUNC(SPI0_SS0, OUT),
216 K210_FUNC(SPI0_SS1, OUT),
217 K210_FUNC(SPI0_SS2, OUT),
218 K210_FUNC(SPI0_SS3, OUT),
219 K210_FUNC(SPI0_ARB, IN_TIE),
220 K210_FUNC(SPI0_SCLK, OUT),
221 K210_FUNC(UARTHS_RX, IN),
222 K210_FUNC(UARTHS_TX, OUT),
223 K210_FUNC(RESV6, IN),
224 K210_FUNC(RESV7, IN),
225 K210_FUNC(CLK_SPI1, OUT),
226 K210_FUNC(CLK_I2C1, OUT),
227 K210_FUNC(GPIOHS0, GPIO),
228 K210_FUNC(GPIOHS1, GPIO),
229 K210_FUNC(GPIOHS2, GPIO),
230 K210_FUNC(GPIOHS3, GPIO),
231 K210_FUNC(GPIOHS4, GPIO),
232 K210_FUNC(GPIOHS5, GPIO),
233 K210_FUNC(GPIOHS6, GPIO),
234 K210_FUNC(GPIOHS7, GPIO),
235 K210_FUNC(GPIOHS8, GPIO),
236 K210_FUNC(GPIOHS9, GPIO),
237 K210_FUNC(GPIOHS10, GPIO),
238 K210_FUNC(GPIOHS11, GPIO),
239 K210_FUNC(GPIOHS12, GPIO),
240 K210_FUNC(GPIOHS13, GPIO),
241 K210_FUNC(GPIOHS14, GPIO),
242 K210_FUNC(GPIOHS15, GPIO),
243 K210_FUNC(GPIOHS16, GPIO),
244 K210_FUNC(GPIOHS17, GPIO),
245 K210_FUNC(GPIOHS18, GPIO),
246 K210_FUNC(GPIOHS19, GPIO),
247 K210_FUNC(GPIOHS20, GPIO),
248 K210_FUNC(GPIOHS21, GPIO),
249 K210_FUNC(GPIOHS22, GPIO),
250 K210_FUNC(GPIOHS23, GPIO),
251 K210_FUNC(GPIOHS24, GPIO),
252 K210_FUNC(GPIOHS25, GPIO),
253 K210_FUNC(GPIOHS26, GPIO),
254 K210_FUNC(GPIOHS27, GPIO),
255 K210_FUNC(GPIOHS28, GPIO),
256 K210_FUNC(GPIOHS29, GPIO),
257 K210_FUNC(GPIOHS30, GPIO),
258 K210_FUNC(GPIOHS31, GPIO),
259 K210_FUNC(GPIO0, GPIO),
260 K210_FUNC(GPIO1, GPIO),
261 K210_FUNC(GPIO2, GPIO),
262 K210_FUNC(GPIO3, GPIO),
263 K210_FUNC(GPIO4, GPIO),
264 K210_FUNC(GPIO5, GPIO),
265 K210_FUNC(GPIO6, GPIO),
266 K210_FUNC(GPIO7, GPIO),
267 K210_FUNC(UART1_RX, IN),
268 K210_FUNC(UART1_TX, OUT),
269 K210_FUNC(UART2_RX, IN),
270 K210_FUNC(UART2_TX, OUT),
271 K210_FUNC(UART3_RX, IN),
272 K210_FUNC(UART3_TX, OUT),
273 K210_FUNC(SPI1_D0, SPI),
274 K210_FUNC(SPI1_D1, SPI),
275 K210_FUNC(SPI1_D2, SPI),
276 K210_FUNC(SPI1_D3, SPI),
277 K210_FUNC(SPI1_D4, SPI),
278 K210_FUNC(SPI1_D5, SPI),
279 K210_FUNC(SPI1_D6, SPI),
280 K210_FUNC(SPI1_D7, SPI),
281 K210_FUNC(SPI1_SS0, OUT),
282 K210_FUNC(SPI1_SS1, OUT),
283 K210_FUNC(SPI1_SS2, OUT),
284 K210_FUNC(SPI1_SS3, OUT),
285 K210_FUNC(SPI1_ARB, IN_TIE),
286 K210_FUNC(SPI1_SCLK, OUT),
287 K210_FUNC(SPI2_D0, SPI),
288 K210_FUNC(SPI2_SS, IN),
289 K210_FUNC(SPI2_SCLK, IN),
290 K210_FUNC(I2S0_MCLK, OUT),
291 K210_FUNC(I2S0_SCLK, OUT),
292 K210_FUNC(I2S0_WS, OUT),
293 K210_FUNC(I2S0_IN_D0, IN),
294 K210_FUNC(I2S0_IN_D1, IN),
295 K210_FUNC(I2S0_IN_D2, IN),
296 K210_FUNC(I2S0_IN_D3, IN),
297 K210_FUNC(I2S0_OUT_D0, OUT),
298 K210_FUNC(I2S0_OUT_D1, OUT),
299 K210_FUNC(I2S0_OUT_D2, OUT),
300 K210_FUNC(I2S0_OUT_D3, OUT),
301 K210_FUNC(I2S1_MCLK, OUT),
302 K210_FUNC(I2S1_SCLK, OUT),
303 K210_FUNC(I2S1_WS, OUT),
304 K210_FUNC(I2S1_IN_D0, IN),
305 K210_FUNC(I2S1_IN_D1, IN),
306 K210_FUNC(I2S1_IN_D2, IN),
307 K210_FUNC(I2S1_IN_D3, IN),
308 K210_FUNC(I2S1_OUT_D0, OUT),
309 K210_FUNC(I2S1_OUT_D1, OUT),
310 K210_FUNC(I2S1_OUT_D2, OUT),
311 K210_FUNC(I2S1_OUT_D3, OUT),
312 K210_FUNC(I2S2_MCLK, OUT),
313 K210_FUNC(I2S2_SCLK, OUT),
314 K210_FUNC(I2S2_WS, OUT),
315 K210_FUNC(I2S2_IN_D0, IN),
316 K210_FUNC(I2S2_IN_D1, IN),
317 K210_FUNC(I2S2_IN_D2, IN),
318 K210_FUNC(I2S2_IN_D3, IN),
319 K210_FUNC(I2S2_OUT_D0, OUT),
320 K210_FUNC(I2S2_OUT_D1, OUT),
321 K210_FUNC(I2S2_OUT_D2, OUT),
322 K210_FUNC(I2S2_OUT_D3, OUT),
323 K210_FUNC(RESV0, DISABLED),
324 K210_FUNC(RESV1, DISABLED),
325 K210_FUNC(RESV2, DISABLED),
326 K210_FUNC(RESV3, DISABLED),
327 K210_FUNC(RESV4, DISABLED),
328 K210_FUNC(RESV5, DISABLED),
329 K210_FUNC(I2C0_SCLK, I2C),
330 K210_FUNC(I2C0_SDA, I2C),
331 K210_FUNC(I2C1_SCLK, I2C),
332 K210_FUNC(I2C1_SDA, I2C),
333 K210_FUNC(I2C2_SCLK, I2C),
334 K210_FUNC(I2C2_SDA, I2C),
335 K210_FUNC(DVP_XCLK, OUT),
336 K210_FUNC(DVP_RST, OUT),
337 K210_FUNC(DVP_PWDN, OUT),
338 K210_FUNC(DVP_VSYNC, IN),
339 K210_FUNC(DVP_HSYNC, IN),
340 K210_FUNC(DVP_PCLK, IN),
341 K210_FUNC(DVP_D0, IN),
342 K210_FUNC(DVP_D1, IN),
343 K210_FUNC(DVP_D2, IN),
344 K210_FUNC(DVP_D3, IN),
345 K210_FUNC(DVP_D4, IN),
346 K210_FUNC(DVP_D5, IN),
347 K210_FUNC(DVP_D6, IN),
348 K210_FUNC(DVP_D7, IN),
349 K210_FUNC(SCCB_SCLK, SCCB),
350 K210_FUNC(SCCB_SDA, SCCB),
351 K210_FUNC(UART1_CTS, IN),
352 K210_FUNC(UART1_DSR, IN),
353 K210_FUNC(UART1_DCD, IN),
354 K210_FUNC(UART1_RI, IN),
355 K210_FUNC(UART1_SIR_IN, IN),
356 K210_FUNC(UART1_DTR, OUT),
357 K210_FUNC(UART1_RTS, OUT),
358 K210_FUNC(UART1_OUT2, OUT),
359 K210_FUNC(UART1_OUT1, OUT),
360 K210_FUNC(UART1_SIR_OUT, OUT),
361 K210_FUNC(UART1_BAUD, OUT),
362 K210_FUNC(UART1_RE, OUT),
363 K210_FUNC(UART1_DE, OUT),
364 K210_FUNC(UART1_RS485_EN, OUT),
365 K210_FUNC(UART2_CTS, IN),
366 K210_FUNC(UART2_DSR, IN),
367 K210_FUNC(UART2_DCD, IN),
368 K210_FUNC(UART2_RI, IN),
369 K210_FUNC(UART2_SIR_IN, IN),
370 K210_FUNC(UART2_DTR, OUT),
371 K210_FUNC(UART2_RTS, OUT),
372 K210_FUNC(UART2_OUT2, OUT),
373 K210_FUNC(UART2_OUT1, OUT),
374 K210_FUNC(UART2_SIR_OUT, OUT),
375 K210_FUNC(UART2_BAUD, OUT),
376 K210_FUNC(UART2_RE, OUT),
377 K210_FUNC(UART2_DE, OUT),
378 K210_FUNC(UART2_RS485_EN, OUT),
379 K210_FUNC(UART3_CTS, IN),
380 K210_FUNC(UART3_DSR, IN),
381 K210_FUNC(UART3_DCD, IN),
382 K210_FUNC(UART3_RI, IN),
383 K210_FUNC(UART3_SIR_IN, IN),
384 K210_FUNC(UART3_DTR, OUT),
385 K210_FUNC(UART3_RTS, OUT),
386 K210_FUNC(UART3_OUT2, OUT),
387 K210_FUNC(UART3_OUT1, OUT),
388 K210_FUNC(UART3_SIR_OUT, OUT),
389 K210_FUNC(UART3_BAUD, OUT),
390 K210_FUNC(UART3_RE, OUT),
391 K210_FUNC(UART3_DE, OUT),
392 K210_FUNC(UART3_RS485_EN, OUT),
393 K210_FUNC(TIMER0_TOGGLE1, OUT),
394 K210_FUNC(TIMER0_TOGGLE2, OUT),
395 K210_FUNC(TIMER0_TOGGLE3, OUT),
396 K210_FUNC(TIMER0_TOGGLE4, OUT),
397 K210_FUNC(TIMER1_TOGGLE1, OUT),
398 K210_FUNC(TIMER1_TOGGLE2, OUT),
399 K210_FUNC(TIMER1_TOGGLE3, OUT),
400 K210_FUNC(TIMER1_TOGGLE4, OUT),
401 K210_FUNC(TIMER2_TOGGLE1, OUT),
402 K210_FUNC(TIMER2_TOGGLE2, OUT),
403 K210_FUNC(TIMER2_TOGGLE3, OUT),
404 K210_FUNC(TIMER2_TOGGLE4, OUT),
405 K210_FUNC(CLK_SPI2, OUT),
406 K210_FUNC(CLK_I2C2, OUT),
407 K210_FUNC(INTERNAL0, OUT),
408 K210_FUNC(INTERNAL1, OUT),
409 K210_FUNC(INTERNAL2, OUT),
410 K210_FUNC(INTERNAL3, OUT),
411 K210_FUNC(INTERNAL4, OUT),
412 K210_FUNC(INTERNAL5, OUT),
413 K210_FUNC(INTERNAL6, OUT),
414 K210_FUNC(INTERNAL7, OUT),
415 K210_FUNC(INTERNAL8, OUT),
416 K210_FUNC(INTERNAL9, IN),
417 K210_FUNC(INTERNAL10, IN),
418 K210_FUNC(INTERNAL11, IN),
419 K210_FUNC(INTERNAL12, IN),
420 K210_FUNC(INTERNAL13, INT13),
421 K210_FUNC(INTERNAL14, I2C),
422 K210_FUNC(INTERNAL15, IN),
423 K210_FUNC(INTERNAL16, IN),
424 K210_FUNC(INTERNAL17, IN),
425 K210_FUNC(CONSTANT, DISABLED),
426 K210_FUNC(INTERNAL18, IN),
427 K210_FUNC(DEBUG0, OUT),
428 K210_FUNC(DEBUG1, OUT),
429 K210_FUNC(DEBUG2, OUT),
430 K210_FUNC(DEBUG3, OUT),
431 K210_FUNC(DEBUG4, OUT),
432 K210_FUNC(DEBUG5, OUT),
433 K210_FUNC(DEBUG6, OUT),
434 K210_FUNC(DEBUG7, OUT),
435 K210_FUNC(DEBUG8, OUT),
436 K210_FUNC(DEBUG9, OUT),
437 K210_FUNC(DEBUG10, OUT),
438 K210_FUNC(DEBUG11, OUT),
439 K210_FUNC(DEBUG12, OUT),
440 K210_FUNC(DEBUG13, OUT),
441 K210_FUNC(DEBUG14, OUT),
442 K210_FUNC(DEBUG15, OUT),
443 K210_FUNC(DEBUG16, OUT),
444 K210_FUNC(DEBUG17, OUT),
445 K210_FUNC(DEBUG18, OUT),
446 K210_FUNC(DEBUG19, OUT),
447 K210_FUNC(DEBUG20, OUT),
448 K210_FUNC(DEBUG21, OUT),
449 K210_FUNC(DEBUG22, OUT),
450 K210_FUNC(DEBUG23, OUT),
451 K210_FUNC(DEBUG24, OUT),
452 K210_FUNC(DEBUG25, OUT),
453 K210_FUNC(DEBUG26, OUT),
454 K210_FUNC(DEBUG27, OUT),
455 K210_FUNC(DEBUG28, OUT),
456 K210_FUNC(DEBUG29, OUT),
457 K210_FUNC(DEBUG30, OUT),
458 K210_FUNC(DEBUG31, OUT),
459};
460
461#define PIN_CONFIG_OUTPUT_INVERT (PIN_CONFIG_END + 1)
462#define PIN_CONFIG_INPUT_INVERT (PIN_CONFIG_END + 2)
463
464static const struct pinconf_generic_params k210_pinconf_custom_params[] = {
465 { "output-polarity-invert", PIN_CONFIG_OUTPUT_INVERT, 1 },
466 { "input-polarity-invert", PIN_CONFIG_INPUT_INVERT, 1 },
467};
468
469/*
470 * Max drive strength in uA.
471 */
472static const int k210_pinconf_drive_strength[] = {
473 [0] = 11200,
474 [1] = 16800,
475 [2] = 22300,
476 [3] = 27800,
477 [4] = 33300,
478 [5] = 38700,
479 [6] = 44100,
480 [7] = 49500,
481};
482
483static int k210_pinconf_get_drive(unsigned int max_strength_ua)
484{
485 int i;
486
487 for (i = K210_PC_DRIVE_MAX; i >= 0; i--) {
488 if (k210_pinconf_drive_strength[i] <= max_strength_ua)
489 return i;
490 }
491
492 return -EINVAL;
493}
494
495static void k210_pinmux_set_pin_function(struct pinctrl_dev *pctldev,
496 u32 pin, u32 func)
497{
498 struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev);
499 const struct k210_pcf_info *info = &k210_pcf_infos[func];
500 u32 mode = k210_pinconf_mode_id_to_mode[info->mode_id];
501 u32 val = func | mode;
502
503 dev_dbg(pdata->dev, "set pin %u function %s (%u) -> 0x%08x\n",
504 pin, info->name, func, val);
505
506 writel(val, &pdata->fpioa->pins[pin]);
507}
508
509static int k210_pinconf_set_param(struct pinctrl_dev *pctldev,
510 unsigned int pin,
511 unsigned int param, unsigned int arg)
512{
513 struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev);
514 u32 val = readl(&pdata->fpioa->pins[pin]);
515 int drive;
516
517 dev_dbg(pdata->dev, "set pin %u param %u, arg 0x%x\n",
518 pin, param, arg);
519
520 switch (param) {
521 case PIN_CONFIG_BIAS_DISABLE:
522 val &= ~K210_PC_BIAS_MASK;
523 break;
524 case PIN_CONFIG_BIAS_PULL_DOWN:
525 if (!arg)
526 return -EINVAL;
527 val |= K210_PC_PD;
528 break;
529 case PIN_CONFIG_BIAS_PULL_UP:
530 if (!arg)
531 return -EINVAL;
532 val |= K210_PC_PU;
533 break;
534 case PIN_CONFIG_DRIVE_STRENGTH:
535 arg *= 1000;
536 fallthrough;
537 case PIN_CONFIG_DRIVE_STRENGTH_UA:
538 drive = k210_pinconf_get_drive(arg);
539 if (drive < 0)
540 return drive;
541 val &= ~K210_PC_DRIVE_MASK;
542 val |= FIELD_PREP(K210_PC_DRIVE_MASK, drive);
543 break;
544 case PIN_CONFIG_INPUT_ENABLE:
545 if (arg)
546 val |= K210_PC_IE;
547 else
548 val &= ~K210_PC_IE;
549 break;
550 case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
551 if (arg)
552 val |= K210_PC_ST;
553 else
554 val &= ~K210_PC_ST;
555 break;
556 case PIN_CONFIG_OUTPUT:
557 k210_pinmux_set_pin_function(pctldev, pin, K210_PCF_CONSTANT);
558 val = readl(&pdata->fpioa->pins[pin]);
559 val |= K210_PC_MODE_OUT;
560 if (!arg)
561 val |= K210_PC_DO_INV;
562 break;
563 case PIN_CONFIG_OUTPUT_ENABLE:
564 if (arg)
565 val |= K210_PC_OE;
566 else
567 val &= ~K210_PC_OE;
568 break;
569 case PIN_CONFIG_SLEW_RATE:
570 if (arg)
571 val |= K210_PC_SL;
572 else
573 val &= ~K210_PC_SL;
574 break;
575 case PIN_CONFIG_OUTPUT_INVERT:
576 if (arg)
577 val |= K210_PC_DO_INV;
578 else
579 val &= ~K210_PC_DO_INV;
580 break;
581 case PIN_CONFIG_INPUT_INVERT:
582 if (arg)
583 val |= K210_PC_DI_INV;
584 else
585 val &= ~K210_PC_DI_INV;
586 break;
587 default:
588 return -EINVAL;
589 }
590
591 writel(val, &pdata->fpioa->pins[pin]);
592
593 return 0;
594}
595
596static int k210_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
597 unsigned long *configs, unsigned int num_configs)
598{
599 unsigned int param, arg;
600 int i, ret;
601
602 if (WARN_ON(pin >= K210_NPINS))
603 return -EINVAL;
604
605 for (i = 0; i < num_configs; i++) {
606 param = pinconf_to_config_param(configs[i]);
607 arg = pinconf_to_config_argument(configs[i]);
608 ret = k210_pinconf_set_param(pctldev, pin, param, arg);
609 if (ret)
610 return ret;
611 }
612
613 return 0;
614}
615
616static void k210_pinconf_dbg_show(struct pinctrl_dev *pctldev,
617 struct seq_file *s, unsigned int pin)
618{
619 struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev);
620
621 seq_printf(s, "%#x", readl(&pdata->fpioa->pins[pin]));
622}
623
624static int k210_pinconf_group_set(struct pinctrl_dev *pctldev,
625 unsigned int selector, unsigned long *configs,
626 unsigned int num_configs)
627{
628 struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev);
629 unsigned int param, arg;
630 u32 bit;
631 int i;
632
633 /* Pins should be configured with pinmux, not groups*/
634 if (selector < K210_NPINS)
635 return -EINVAL;
636
637 /* Otherwise it's a power domain */
638 for (i = 0; i < num_configs; i++) {
639 param = pinconf_to_config_param(configs[i]);
640 if (param != PIN_CONFIG_POWER_SOURCE)
641 return -EINVAL;
642
643 arg = pinconf_to_config_argument(configs[i]);
644 bit = BIT(selector - K210_NPINS);
645 regmap_update_bits(pdata->sysctl_map,
646 pdata->power_offset,
647 bit, arg ? bit : 0);
648 }
649
650 return 0;
651}
652
653static void k210_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
654 struct seq_file *s,
655 unsigned int selector)
656{
657 struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev);
658 int ret;
659 u32 val;
660
661 if (selector < K210_NPINS)
662 return k210_pinconf_dbg_show(pctldev, s, selector);
663
664 ret = regmap_read(pdata->sysctl_map, pdata->power_offset, &val);
665 if (ret) {
666 dev_err(pdata->dev, "Failed to read power reg\n");
667 return;
668 }
669
670 seq_printf(s, "%s: %s V", k210_group_names[selector],
671 val & BIT(selector - K210_NPINS) ? "1.8" : "3.3");
672}
673
674static const struct pinconf_ops k210_pinconf_ops = {
675 .is_generic = true,
676 .pin_config_set = k210_pinconf_set,
677 .pin_config_group_set = k210_pinconf_group_set,
678 .pin_config_dbg_show = k210_pinconf_dbg_show,
679 .pin_config_group_dbg_show = k210_pinconf_group_dbg_show,
680};
681
682static int k210_pinmux_get_function_count(struct pinctrl_dev *pctldev)
683{
684 return ARRAY_SIZE(k210_pcf_infos);
685}
686
687static const char *k210_pinmux_get_function_name(struct pinctrl_dev *pctldev,
688 unsigned int selector)
689{
690 return k210_pcf_infos[selector].name;
691}
692
693static int k210_pinmux_get_function_groups(struct pinctrl_dev *pctldev,
694 unsigned int selector,
695 const char * const **groups,
696 unsigned int * const num_groups)
697{
698 /* Any function can be mapped to any pin */
699 *groups = k210_group_names;
700 *num_groups = K210_NPINS;
701
702 return 0;
703}
704
705static int k210_pinmux_set_mux(struct pinctrl_dev *pctldev,
706 unsigned int function,
707 unsigned int group)
708{
709 /* Can't mux power domains */
710 if (group >= K210_NPINS)
711 return -EINVAL;
712
713 k210_pinmux_set_pin_function(pctldev, group, function);
714
715 return 0;
716}
717
718static const struct pinmux_ops k210_pinmux_ops = {
719 .get_functions_count = k210_pinmux_get_function_count,
720 .get_function_name = k210_pinmux_get_function_name,
721 .get_function_groups = k210_pinmux_get_function_groups,
722 .set_mux = k210_pinmux_set_mux,
723 .strict = true,
724};
725
726static int k210_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
727{
728 return K210_NGROUPS;
729}
730
731static const char *k210_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
732 unsigned int group)
733{
734 return k210_group_names[group];
735}
736
737static int k210_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
738 unsigned int group,
739 const unsigned int **pins,
740 unsigned int *npins)
741{
742 if (group >= K210_NPINS) {
743 *pins = NULL;
744 *npins = 0;
745 return 0;
746 }
747
748 *pins = &k210_pins[group].number;
749 *npins = 1;
750
751 return 0;
752}
753
754static void k210_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
755 struct seq_file *s, unsigned int offset)
756{
757 seq_printf(s, "%s", dev_name(pctldev->dev));
758}
759
760static int k210_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
761 struct device_node *np,
762 struct pinctrl_map **map,
763 unsigned int *reserved_maps,
764 unsigned int *num_maps)
765{
766 struct property *prop;
767 const __be32 *p;
768 int ret, pinmux_groups;
769 u32 pinmux_group;
770 unsigned long *configs = NULL;
771 unsigned int num_configs = 0;
772 unsigned int reserve = 0;
773
774 ret = of_property_count_strings(np, "groups");
775 if (!ret)
776 return pinconf_generic_dt_subnode_to_map(pctldev, np, map,
777 reserved_maps, num_maps,
778 PIN_MAP_TYPE_CONFIGS_GROUP);
779
780 pinmux_groups = of_property_count_u32_elems(np, "pinmux");
781 if (pinmux_groups <= 0) {
782 /* Ignore this node */
783 return 0;
784 }
785
786 ret = pinconf_generic_parse_dt_config(np, pctldev, &configs,
787 &num_configs);
788 if (ret < 0) {
789 dev_err(pctldev->dev, "%pOF: could not parse node property\n",
790 np);
791 return ret;
792 }
793
794 reserve = pinmux_groups * (1 + num_configs);
795 ret = pinctrl_utils_reserve_map(pctldev, map, reserved_maps, num_maps,
796 reserve);
797 if (ret < 0)
798 goto exit;
799
800 of_property_for_each_u32(np, "pinmux", prop, p, pinmux_group) {
801 const char *group_name, *func_name;
802 u32 pin = FIELD_GET(K210_PG_PIN, pinmux_group);
803 u32 func = FIELD_GET(K210_PG_FUNC, pinmux_group);
804
805 if (pin >= K210_NPINS) {
806 ret = -EINVAL;
807 goto exit;
808 }
809
810 group_name = k210_group_names[pin];
811 func_name = k210_pcf_infos[func].name;
812
813 dev_dbg(pctldev->dev, "Pinmux %s: pin %u func %s\n",
814 np->name, pin, func_name);
815
816 ret = pinctrl_utils_add_map_mux(pctldev, map, reserved_maps,
817 num_maps, group_name,
818 func_name);
819 if (ret < 0) {
820 dev_err(pctldev->dev, "%pOF add mux map failed %d\n",
821 np, ret);
822 goto exit;
823 }
824
825 if (num_configs) {
826 ret = pinctrl_utils_add_map_configs(pctldev, map,
827 reserved_maps, num_maps, group_name,
828 configs, num_configs,
829 PIN_MAP_TYPE_CONFIGS_PIN);
830 if (ret < 0) {
831 dev_err(pctldev->dev,
832 "%pOF add configs map failed %d\n",
833 np, ret);
834 goto exit;
835 }
836 }
837 }
838
839 ret = 0;
840
841exit:
842 kfree(configs);
843 return ret;
844}
845
846static int k210_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
847 struct device_node *np_config,
848 struct pinctrl_map **map,
849 unsigned int *num_maps)
850{
851 unsigned int reserved_maps;
852 struct device_node *np;
853 int ret;
854
855 reserved_maps = 0;
856 *map = NULL;
857 *num_maps = 0;
858
859 ret = k210_pinctrl_dt_subnode_to_map(pctldev, np_config, map,
860 &reserved_maps, num_maps);
861 if (ret < 0)
862 goto err;
863
864 for_each_available_child_of_node(np_config, np) {
865 ret = k210_pinctrl_dt_subnode_to_map(pctldev, np, map,
866 &reserved_maps, num_maps);
867 if (ret < 0) {
868 of_node_put(np);
869 goto err;
870 }
871 }
872 return 0;
873
874err:
875 pinctrl_utils_free_map(pctldev, *map, *num_maps);
876 return ret;
877}
878
879
880static const struct pinctrl_ops k210_pinctrl_ops = {
881 .get_groups_count = k210_pinctrl_get_groups_count,
882 .get_group_name = k210_pinctrl_get_group_name,
883 .get_group_pins = k210_pinctrl_get_group_pins,
884 .pin_dbg_show = k210_pinctrl_pin_dbg_show,
885 .dt_node_to_map = k210_pinctrl_dt_node_to_map,
886 .dt_free_map = pinconf_generic_dt_free_map,
887};
888
889static struct pinctrl_desc k210_pinctrl_desc = {
890 .name = "k210-pinctrl",
891 .pins = k210_pins,
892 .npins = K210_NPINS,
893 .pctlops = &k210_pinctrl_ops,
894 .pmxops = &k210_pinmux_ops,
895 .confops = &k210_pinconf_ops,
896 .custom_params = k210_pinconf_custom_params,
897 .num_custom_params = ARRAY_SIZE(k210_pinconf_custom_params),
898};
899
900static void k210_fpioa_init_ties(struct k210_fpioa_data *pdata)
901{
902 struct k210_fpioa __iomem *fpioa = pdata->fpioa;
903 u32 val;
904 int i, j;
905
906 dev_dbg(pdata->dev, "Init pin ties\n");
907
908 /* Init pin functions input ties */
909 for (i = 0; i < ARRAY_SIZE(fpioa->tie_en); i++) {
910 val = 0;
911 for (j = 0; j < 32; j++) {
912 if (k210_pcf_infos[i * 32 + j].mode_id ==
913 K210_PC_DEFAULT_IN_TIE) {
914 dev_dbg(pdata->dev,
915 "tie_en function %d (%s)\n",
916 i * 32 + j,
917 k210_pcf_infos[i * 32 + j].name);
918 val |= BIT(j);
919 }
920 }
921
922 /* Set value before enable */
923 writel(val, &fpioa->tie_val[i]);
924 writel(val, &fpioa->tie_en[i]);
925 }
926}
927
928static int k210_fpioa_probe(struct platform_device *pdev)
929{
930 struct device *dev = &pdev->dev;
931 struct device_node *np = dev->of_node;
932 struct k210_fpioa_data *pdata;
933 int ret;
934
935 dev_info(dev, "K210 FPIOA pin controller\n");
936
937 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
938 if (!pdata)
939 return -ENOMEM;
940
941 pdata->dev = dev;
942 platform_set_drvdata(pdev, pdata);
943
944 pdata->fpioa = devm_platform_ioremap_resource(pdev, 0);
945 if (IS_ERR(pdata->fpioa))
946 return PTR_ERR(pdata->fpioa);
947
948 pdata->clk = devm_clk_get(dev, "ref");
949 if (IS_ERR(pdata->clk))
950 return PTR_ERR(pdata->clk);
951
952 ret = clk_prepare_enable(pdata->clk);
953 if (ret)
954 return ret;
955
956 pdata->pclk = devm_clk_get_optional(dev, "pclk");
957 if (!IS_ERR(pdata->pclk)) {
958 ret = clk_prepare_enable(pdata->pclk);
959 if (ret)
960 goto disable_clk;
961 }
962
963 pdata->sysctl_map =
964 syscon_regmap_lookup_by_phandle_args(np,
965 "canaan,k210-sysctl-power",
966 1, &pdata->power_offset);
967 if (IS_ERR(pdata->sysctl_map)) {
968 ret = PTR_ERR(pdata->sysctl_map);
969 goto disable_pclk;
970 }
971
972 k210_fpioa_init_ties(pdata);
973
974 pdata->pctl = pinctrl_register(&k210_pinctrl_desc, dev, (void *)pdata);
975 if (IS_ERR(pdata->pctl)) {
976 ret = PTR_ERR(pdata->pctl);
977 goto disable_pclk;
978 }
979
980 return 0;
981
982disable_pclk:
983 clk_disable_unprepare(pdata->pclk);
984disable_clk:
985 clk_disable_unprepare(pdata->clk);
986
987 return ret;
988}
989
990static const struct of_device_id k210_fpioa_dt_ids[] = {
991 { .compatible = "canaan,k210-fpioa" },
992 { /* sentinel */ },
993};
994
995static struct platform_driver k210_fpioa_driver = {
996 .probe = k210_fpioa_probe,
997 .driver = {
998 .name = "k210-fpioa",
999 .of_match_table = k210_fpioa_dt_ids,
1000 },
1001};
1002builtin_platform_driver(k210_fpioa_driver);