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spi-topcliff-pch: Fix issue for transmitting over 4KByte
[zen-stable.git] / arch / arm / mach-tegra / pinmux.c
blobac35d2b7685026d10ed9a9fb9570a1fde894b23f
1 /*
2 * linux/arch/arm/mach-tegra/pinmux.c
3 *
4 * Copyright (C) 2010 Google, Inc.
5 *
6 * This software is licensed under the terms of the GNU General Public
7 * License version 2, as published by the Free Software Foundation, and
8 * may be copied, distributed, and modified under those terms.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 */
16
17 #include <linux/init.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/spinlock.h>
22 #include <linux/io.h>
23 #include <linux/platform_device.h>
24 #include <linux/of_device.h>
25
26 #include <mach/iomap.h>
27 #include <mach/pinmux.h>
28
29 #define HSM_EN(reg) (((reg) >> 2) & 0x1)
30 #define SCHMT_EN(reg) (((reg) >> 3) & 0x1)
31 #define LPMD(reg) (((reg) >> 4) & 0x3)
32 #define DRVDN(reg) (((reg) >> 12) & 0x1f)
33 #define DRVUP(reg) (((reg) >> 20) & 0x1f)
34 #define SLWR(reg) (((reg) >> 28) & 0x3)
35 #define SLWF(reg) (((reg) >> 30) & 0x3)
36
37 static const struct tegra_pingroup_desc *pingroups;
38 static const struct tegra_drive_pingroup_desc *drive_pingroups;
39 static int pingroup_max;
40 static int drive_max;
41
42 static char *tegra_mux_names[TEGRA_MAX_MUX] = {
43 [TEGRA_MUX_AHB_CLK] = "AHB_CLK",
44 [TEGRA_MUX_APB_CLK] = "APB_CLK",
45 [TEGRA_MUX_AUDIO_SYNC] = "AUDIO_SYNC",
46 [TEGRA_MUX_CRT] = "CRT",
47 [TEGRA_MUX_DAP1] = "DAP1",
48 [TEGRA_MUX_DAP2] = "DAP2",
49 [TEGRA_MUX_DAP3] = "DAP3",
50 [TEGRA_MUX_DAP4] = "DAP4",
51 [TEGRA_MUX_DAP5] = "DAP5",
52 [TEGRA_MUX_DISPLAYA] = "DISPLAYA",
53 [TEGRA_MUX_DISPLAYB] = "DISPLAYB",
54 [TEGRA_MUX_EMC_TEST0_DLL] = "EMC_TEST0_DLL",
55 [TEGRA_MUX_EMC_TEST1_DLL] = "EMC_TEST1_DLL",
56 [TEGRA_MUX_GMI] = "GMI",
57 [TEGRA_MUX_GMI_INT] = "GMI_INT",
58 [TEGRA_MUX_HDMI] = "HDMI",
59 [TEGRA_MUX_I2C] = "I2C",
60 [TEGRA_MUX_I2C2] = "I2C2",
61 [TEGRA_MUX_I2C3] = "I2C3",
62 [TEGRA_MUX_IDE] = "IDE",
63 [TEGRA_MUX_IRDA] = "IRDA",
64 [TEGRA_MUX_KBC] = "KBC",
65 [TEGRA_MUX_MIO] = "MIO",
66 [TEGRA_MUX_MIPI_HS] = "MIPI_HS",
67 [TEGRA_MUX_NAND] = "NAND",
68 [TEGRA_MUX_OSC] = "OSC",
69 [TEGRA_MUX_OWR] = "OWR",
70 [TEGRA_MUX_PCIE] = "PCIE",
71 [TEGRA_MUX_PLLA_OUT] = "PLLA_OUT",
72 [TEGRA_MUX_PLLC_OUT1] = "PLLC_OUT1",
73 [TEGRA_MUX_PLLM_OUT1] = "PLLM_OUT1",
74 [TEGRA_MUX_PLLP_OUT2] = "PLLP_OUT2",
75 [TEGRA_MUX_PLLP_OUT3] = "PLLP_OUT3",
76 [TEGRA_MUX_PLLP_OUT4] = "PLLP_OUT4",
77 [TEGRA_MUX_PWM] = "PWM",
78 [TEGRA_MUX_PWR_INTR] = "PWR_INTR",
79 [TEGRA_MUX_PWR_ON] = "PWR_ON",
80 [TEGRA_MUX_RTCK] = "RTCK",
81 [TEGRA_MUX_SDIO1] = "SDIO1",
82 [TEGRA_MUX_SDIO2] = "SDIO2",
83 [TEGRA_MUX_SDIO3] = "SDIO3",
84 [TEGRA_MUX_SDIO4] = "SDIO4",
85 [TEGRA_MUX_SFLASH] = "SFLASH",
86 [TEGRA_MUX_SPDIF] = "SPDIF",
87 [TEGRA_MUX_SPI1] = "SPI1",
88 [TEGRA_MUX_SPI2] = "SPI2",
89 [TEGRA_MUX_SPI2_ALT] = "SPI2_ALT",
90 [TEGRA_MUX_SPI3] = "SPI3",
91 [TEGRA_MUX_SPI4] = "SPI4",
92 [TEGRA_MUX_TRACE] = "TRACE",
93 [TEGRA_MUX_TWC] = "TWC",
94 [TEGRA_MUX_UARTA] = "UARTA",
95 [TEGRA_MUX_UARTB] = "UARTB",
96 [TEGRA_MUX_UARTC] = "UARTC",
97 [TEGRA_MUX_UARTD] = "UARTD",
98 [TEGRA_MUX_UARTE] = "UARTE",
99 [TEGRA_MUX_ULPI] = "ULPI",
100 [TEGRA_MUX_VI] = "VI",
101 [TEGRA_MUX_VI_SENSOR_CLK] = "VI_SENSOR_CLK",
102 [TEGRA_MUX_XIO] = "XIO",
103 [TEGRA_MUX_BLINK] = "BLINK",
104 [TEGRA_MUX_CEC] = "CEC",
105 [TEGRA_MUX_CLK12] = "CLK12",
106 [TEGRA_MUX_DAP] = "DAP",
107 [TEGRA_MUX_DAPSDMMC2] = "DAPSDMMC2",
108 [TEGRA_MUX_DDR] = "DDR",
109 [TEGRA_MUX_DEV3] = "DEV3",
110 [TEGRA_MUX_DTV] = "DTV",
111 [TEGRA_MUX_VI_ALT1] = "VI_ALT1",
112 [TEGRA_MUX_VI_ALT2] = "VI_ALT2",
113 [TEGRA_MUX_VI_ALT3] = "VI_ALT3",
114 [TEGRA_MUX_EMC_DLL] = "EMC_DLL",
115 [TEGRA_MUX_EXTPERIPH1] = "EXTPERIPH1",
116 [TEGRA_MUX_EXTPERIPH2] = "EXTPERIPH2",
117 [TEGRA_MUX_EXTPERIPH3] = "EXTPERIPH3",
118 [TEGRA_MUX_GMI_ALT] = "GMI_ALT",
119 [TEGRA_MUX_HDA] = "HDA",
120 [TEGRA_MUX_HSI] = "HSI",
121 [TEGRA_MUX_I2C4] = "I2C4",
122 [TEGRA_MUX_I2C5] = "I2C5",
123 [TEGRA_MUX_I2CPWR] = "I2CPWR",
124 [TEGRA_MUX_I2S0] = "I2S0",
125 [TEGRA_MUX_I2S1] = "I2S1",
126 [TEGRA_MUX_I2S2] = "I2S2",
127 [TEGRA_MUX_I2S3] = "I2S3",
128 [TEGRA_MUX_I2S4] = "I2S4",
129 [TEGRA_MUX_NAND_ALT] = "NAND_ALT",
130 [TEGRA_MUX_POPSDIO4] = "POPSDIO4",
131 [TEGRA_MUX_POPSDMMC4] = "POPSDMMC4",
132 [TEGRA_MUX_PWM0] = "PWM0",
133 [TEGRA_MUX_PWM1] = "PWM2",
134 [TEGRA_MUX_PWM2] = "PWM2",
135 [TEGRA_MUX_PWM3] = "PWM3",
136 [TEGRA_MUX_SATA] = "SATA",
137 [TEGRA_MUX_SPI5] = "SPI5",
138 [TEGRA_MUX_SPI6] = "SPI6",
139 [TEGRA_MUX_SYSCLK] = "SYSCLK",
140 [TEGRA_MUX_VGP1] = "VGP1",
141 [TEGRA_MUX_VGP2] = "VGP2",
142 [TEGRA_MUX_VGP3] = "VGP3",
143 [TEGRA_MUX_VGP4] = "VGP4",
144 [TEGRA_MUX_VGP5] = "VGP5",
145 [TEGRA_MUX_VGP6] = "VGP6",
146 [TEGRA_MUX_SAFE] = "<safe>",
147 };
148
149 static const char *tegra_drive_names[TEGRA_MAX_DRIVE] = {
150 [TEGRA_DRIVE_DIV_8] = "DIV_8",
151 [TEGRA_DRIVE_DIV_4] = "DIV_4",
152 [TEGRA_DRIVE_DIV_2] = "DIV_2",
153 [TEGRA_DRIVE_DIV_1] = "DIV_1",
154 };
155
156 static const char *tegra_slew_names[TEGRA_MAX_SLEW] = {
157 [TEGRA_SLEW_FASTEST] = "FASTEST",
158 [TEGRA_SLEW_FAST] = "FAST",
159 [TEGRA_SLEW_SLOW] = "SLOW",
160 [TEGRA_SLEW_SLOWEST] = "SLOWEST",
161 };
162
163 static DEFINE_SPINLOCK(mux_lock);
164
165 static const char *pingroup_name(int pg)
166 {
167 if (pg < 0 || pg >= pingroup_max)
168 return "<UNKNOWN>";
169
170 return pingroups[pg].name;
171 }
172
173 static const char *func_name(enum tegra_mux_func func)
174 {
175 if (func == TEGRA_MUX_RSVD1)
176 return "RSVD1";
177
178 if (func == TEGRA_MUX_RSVD2)
179 return "RSVD2";
180
181 if (func == TEGRA_MUX_RSVD3)
182 return "RSVD3";
183
184 if (func == TEGRA_MUX_RSVD4)
185 return "RSVD4";
186
187 if (func == TEGRA_MUX_NONE)
188 return "NONE";
189
190 if (func < 0 || func >= TEGRA_MAX_MUX)
191 return "<UNKNOWN>";
192
193 return tegra_mux_names[func];
194 }
195
196
197 static const char *tri_name(unsigned long val)
198 {
199 return val ? "TRISTATE" : "NORMAL";
200 }
201
202 static const char *pupd_name(unsigned long val)
203 {
204 switch (val) {
205 case 0:
206 return "NORMAL";
207
208 case 1:
209 return "PULL_DOWN";
210
211 case 2:
212 return "PULL_UP";
213
214 default:
215 return "RSVD";
216 }
217 }
218
219 static int nbanks;
220 static void __iomem **regs;
221
222 static inline u32 pg_readl(u32 bank, u32 reg)
223 {
224 return readl(regs[bank] + reg);
225 }
226
227 static inline void pg_writel(u32 val, u32 bank, u32 reg)
228 {
229 writel(val, regs[bank] + reg);
230 }
231
232 static int tegra_pinmux_set_func(const struct tegra_pingroup_config *config)
233 {
234 int mux = -1;
235 int i;
236 unsigned long reg;
237 unsigned long flags;
238 int pg = config->pingroup;
239 enum tegra_mux_func func = config->func;
240
241 if (pg < 0 || pg >= pingroup_max)
242 return -ERANGE;
243
244 if (pingroups[pg].mux_reg < 0)
245 return -EINVAL;
246
247 if (func < 0)
248 return -ERANGE;
249
250 if (func == TEGRA_MUX_SAFE)
251 func = pingroups[pg].func_safe;
252
253 if (func & TEGRA_MUX_RSVD) {
254 mux = func & 0x3;
255 } else {
256 for (i = 0; i < 4; i++) {
257 if (pingroups[pg].funcs[i] == func) {
258 mux = i;
259 break;
260 }
261 }
262 }
263
264 if (mux < 0)
265 return -EINVAL;
266
267 spin_lock_irqsave(&mux_lock, flags);
268
269 reg = pg_readl(pingroups[pg].mux_bank, pingroups[pg].mux_reg);
270 reg &= ~(0x3 << pingroups[pg].mux_bit);
271 reg |= mux << pingroups[pg].mux_bit;
272 pg_writel(reg, pingroups[pg].mux_bank, pingroups[pg].mux_reg);
273
274 spin_unlock_irqrestore(&mux_lock, flags);
275
276 return 0;
277 }
278
279 int tegra_pinmux_set_tristate(int pg, enum tegra_tristate tristate)
280 {
281 unsigned long reg;
282 unsigned long flags;
283
284 if (pg < 0 || pg >= pingroup_max)
285 return -ERANGE;
286
287 if (pingroups[pg].tri_reg < 0)
288 return -EINVAL;
289
290 spin_lock_irqsave(&mux_lock, flags);
291
292 reg = pg_readl(pingroups[pg].tri_bank, pingroups[pg].tri_reg);
293 reg &= ~(0x1 << pingroups[pg].tri_bit);
294 if (tristate)
295 reg |= 1 << pingroups[pg].tri_bit;
296 pg_writel(reg, pingroups[pg].tri_bank, pingroups[pg].tri_reg);
297
298 spin_unlock_irqrestore(&mux_lock, flags);
299
300 return 0;
301 }
302
303 int tegra_pinmux_set_pullupdown(int pg, enum tegra_pullupdown pupd)
304 {
305 unsigned long reg;
306 unsigned long flags;
307
308 if (pg < 0 || pg >= pingroup_max)
309 return -ERANGE;
310
311 if (pingroups[pg].pupd_reg < 0)
312 return -EINVAL;
313
314 if (pupd != TEGRA_PUPD_NORMAL &&
315 pupd != TEGRA_PUPD_PULL_DOWN &&
316 pupd != TEGRA_PUPD_PULL_UP)
317 return -EINVAL;
318
319
320 spin_lock_irqsave(&mux_lock, flags);
321
322 reg = pg_readl(pingroups[pg].pupd_bank, pingroups[pg].pupd_reg);
323 reg &= ~(0x3 << pingroups[pg].pupd_bit);
324 reg |= pupd << pingroups[pg].pupd_bit;
325 pg_writel(reg, pingroups[pg].pupd_bank, pingroups[pg].pupd_reg);
326
327 spin_unlock_irqrestore(&mux_lock, flags);
328
329 return 0;
330 }
331
332 static void tegra_pinmux_config_pingroup(const struct tegra_pingroup_config *config)
333 {
334 int pingroup = config->pingroup;
335 enum tegra_mux_func func = config->func;
336 enum tegra_pullupdown pupd = config->pupd;
337 enum tegra_tristate tristate = config->tristate;
338 int err;
339
340 if (pingroups[pingroup].mux_reg >= 0) {
341 err = tegra_pinmux_set_func(config);
342 if (err < 0)
343 pr_err("pinmux: can't set pingroup %s func to %s: %d\n",
344 pingroup_name(pingroup), func_name(func), err);
345 }
346
347 if (pingroups[pingroup].pupd_reg >= 0) {
348 err = tegra_pinmux_set_pullupdown(pingroup, pupd);
349 if (err < 0)
350 pr_err("pinmux: can't set pingroup %s pullupdown to %s: %d\n",
351 pingroup_name(pingroup), pupd_name(pupd), err);
352 }
353
354 if (pingroups[pingroup].tri_reg >= 0) {
355 err = tegra_pinmux_set_tristate(pingroup, tristate);
356 if (err < 0)
357 pr_err("pinmux: can't set pingroup %s tristate to %s: %d\n",
358 pingroup_name(pingroup), tri_name(func), err);
359 }
360 }
361
362 void tegra_pinmux_config_table(const struct tegra_pingroup_config *config, int len)
363 {
364 int i;
365
366 for (i = 0; i < len; i++)
367 tegra_pinmux_config_pingroup(&config[i]);
368 }
369
370 static const char *drive_pinmux_name(int pg)
371 {
372 if (pg < 0 || pg >= drive_max)
373 return "<UNKNOWN>";
374
375 return drive_pingroups[pg].name;
376 }
377
378 static const char *enable_name(unsigned long val)
379 {
380 return val ? "ENABLE" : "DISABLE";
381 }
382
383 static const char *drive_name(unsigned long val)
384 {
385 if (val >= TEGRA_MAX_DRIVE)
386 return "<UNKNOWN>";
387
388 return tegra_drive_names[val];
389 }
390
391 static const char *slew_name(unsigned long val)
392 {
393 if (val >= TEGRA_MAX_SLEW)
394 return "<UNKNOWN>";
395
396 return tegra_slew_names[val];
397 }
398
399 static int tegra_drive_pinmux_set_hsm(int pg, enum tegra_hsm hsm)
400 {
401 unsigned long flags;
402 u32 reg;
403 if (pg < 0 || pg >= drive_max)
404 return -ERANGE;
405
406 if (hsm != TEGRA_HSM_ENABLE && hsm != TEGRA_HSM_DISABLE)
407 return -EINVAL;
408
409 spin_lock_irqsave(&mux_lock, flags);
410
411 reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
412 if (hsm == TEGRA_HSM_ENABLE)
413 reg |= (1 << 2);
414 else
415 reg &= ~(1 << 2);
416 pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
417
418 spin_unlock_irqrestore(&mux_lock, flags);
419
420 return 0;
421 }
422
423 static int tegra_drive_pinmux_set_schmitt(int pg, enum tegra_schmitt schmitt)
424 {
425 unsigned long flags;
426 u32 reg;
427 if (pg < 0 || pg >= drive_max)
428 return -ERANGE;
429
430 if (schmitt != TEGRA_SCHMITT_ENABLE && schmitt != TEGRA_SCHMITT_DISABLE)
431 return -EINVAL;
432
433 spin_lock_irqsave(&mux_lock, flags);
434
435 reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
436 if (schmitt == TEGRA_SCHMITT_ENABLE)
437 reg |= (1 << 3);
438 else
439 reg &= ~(1 << 3);
440 pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
441
442 spin_unlock_irqrestore(&mux_lock, flags);
443
444 return 0;
445 }
446
447 static int tegra_drive_pinmux_set_drive(int pg, enum tegra_drive drive)
448 {
449 unsigned long flags;
450 u32 reg;
451 if (pg < 0 || pg >= drive_max)
452 return -ERANGE;
453
454 if (drive < 0 || drive >= TEGRA_MAX_DRIVE)
455 return -EINVAL;
456
457 spin_lock_irqsave(&mux_lock, flags);
458
459 reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
460 reg &= ~(0x3 << 4);
461 reg |= drive << 4;
462 pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
463
464 spin_unlock_irqrestore(&mux_lock, flags);
465
466 return 0;
467 }
468
469 static int tegra_drive_pinmux_set_pull_down(int pg,
470 enum tegra_pull_strength pull_down)
471 {
472 unsigned long flags;
473 u32 reg;
474 if (pg < 0 || pg >= drive_max)
475 return -ERANGE;
476
477 if (pull_down < 0 || pull_down >= TEGRA_MAX_PULL)
478 return -EINVAL;
479
480 spin_lock_irqsave(&mux_lock, flags);
481
482 reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
483 reg &= ~(0x1f << 12);
484 reg |= pull_down << 12;
485 pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
486
487 spin_unlock_irqrestore(&mux_lock, flags);
488
489 return 0;
490 }
491
492 static int tegra_drive_pinmux_set_pull_up(int pg,
493 enum tegra_pull_strength pull_up)
494 {
495 unsigned long flags;
496 u32 reg;
497 if (pg < 0 || pg >= drive_max)
498 return -ERANGE;
499
500 if (pull_up < 0 || pull_up >= TEGRA_MAX_PULL)
501 return -EINVAL;
502
503 spin_lock_irqsave(&mux_lock, flags);
504
505 reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
506 reg &= ~(0x1f << 12);
507 reg |= pull_up << 12;
508 pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
509
510 spin_unlock_irqrestore(&mux_lock, flags);
511
512 return 0;
513 }
514
515 static int tegra_drive_pinmux_set_slew_rising(int pg,
516 enum tegra_slew slew_rising)
517 {
518 unsigned long flags;
519 u32 reg;
520 if (pg < 0 || pg >= drive_max)
521 return -ERANGE;
522
523 if (slew_rising < 0 || slew_rising >= TEGRA_MAX_SLEW)
524 return -EINVAL;
525
526 spin_lock_irqsave(&mux_lock, flags);
527
528 reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
529 reg &= ~(0x3 << 28);
530 reg |= slew_rising << 28;
531 pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
532
533 spin_unlock_irqrestore(&mux_lock, flags);
534
535 return 0;
536 }
537
538 static int tegra_drive_pinmux_set_slew_falling(int pg,
539 enum tegra_slew slew_falling)
540 {
541 unsigned long flags;
542 u32 reg;
543 if (pg < 0 || pg >= drive_max)
544 return -ERANGE;
545
546 if (slew_falling < 0 || slew_falling >= TEGRA_MAX_SLEW)
547 return -EINVAL;
548
549 spin_lock_irqsave(&mux_lock, flags);
550
551 reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
552 reg &= ~(0x3 << 30);
553 reg |= slew_falling << 30;
554 pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg);
555
556 spin_unlock_irqrestore(&mux_lock, flags);
557
558 return 0;
559 }
560
561 static void tegra_drive_pinmux_config_pingroup(int pingroup,
562 enum tegra_hsm hsm,
563 enum tegra_schmitt schmitt,
564 enum tegra_drive drive,
565 enum tegra_pull_strength pull_down,
566 enum tegra_pull_strength pull_up,
567 enum tegra_slew slew_rising,
568 enum tegra_slew slew_falling)
569 {
570 int err;
571
572 err = tegra_drive_pinmux_set_hsm(pingroup, hsm);
573 if (err < 0)
574 pr_err("pinmux: can't set pingroup %s hsm to %s: %d\n",
575 drive_pinmux_name(pingroup),
576 enable_name(hsm), err);
577
578 err = tegra_drive_pinmux_set_schmitt(pingroup, schmitt);
579 if (err < 0)
580 pr_err("pinmux: can't set pingroup %s schmitt to %s: %d\n",
581 drive_pinmux_name(pingroup),
582 enable_name(schmitt), err);
583
584 err = tegra_drive_pinmux_set_drive(pingroup, drive);
585 if (err < 0)
586 pr_err("pinmux: can't set pingroup %s drive to %s: %d\n",
587 drive_pinmux_name(pingroup),
588 drive_name(drive), err);
589
590 err = tegra_drive_pinmux_set_pull_down(pingroup, pull_down);
591 if (err < 0)
592 pr_err("pinmux: can't set pingroup %s pull down to %d: %d\n",
593 drive_pinmux_name(pingroup),
594 pull_down, err);
595
596 err = tegra_drive_pinmux_set_pull_up(pingroup, pull_up);
597 if (err < 0)
598 pr_err("pinmux: can't set pingroup %s pull up to %d: %d\n",
599 drive_pinmux_name(pingroup),
600 pull_up, err);
601
602 err = tegra_drive_pinmux_set_slew_rising(pingroup, slew_rising);
603 if (err < 0)
604 pr_err("pinmux: can't set pingroup %s rising slew to %s: %d\n",
605 drive_pinmux_name(pingroup),
606 slew_name(slew_rising), err);
607
608 err = tegra_drive_pinmux_set_slew_falling(pingroup, slew_falling);
609 if (err < 0)
610 pr_err("pinmux: can't set pingroup %s falling slew to %s: %d\n",
611 drive_pinmux_name(pingroup),
612 slew_name(slew_falling), err);
613 }
614
615 void tegra_drive_pinmux_config_table(struct tegra_drive_pingroup_config *config,
616 int len)
617 {
618 int i;
619
620 for (i = 0; i < len; i++)
621 tegra_drive_pinmux_config_pingroup(config[i].pingroup,
622 config[i].hsm,
623 config[i].schmitt,
624 config[i].drive,
625 config[i].pull_down,
626 config[i].pull_up,
627 config[i].slew_rising,
628 config[i].slew_falling);
629 }
630
631 void tegra_pinmux_set_safe_pinmux_table(const struct tegra_pingroup_config *config,
632 int len)
633 {
634 int i;
635 struct tegra_pingroup_config c;
636
637 for (i = 0; i < len; i++) {
638 int err;
639 c = config[i];
640 if (c.pingroup < 0 || c.pingroup >= pingroup_max) {
641 WARN_ON(1);
642 continue;
643 }
644 c.func = pingroups[c.pingroup].func_safe;
645 err = tegra_pinmux_set_func(&c);
646 if (err < 0)
647 pr_err("%s: tegra_pinmux_set_func returned %d setting "
648 "%s to %s\n", __func__, err,
649 pingroup_name(c.pingroup), func_name(c.func));
650 }
651 }
652
653 void tegra_pinmux_config_pinmux_table(const struct tegra_pingroup_config *config,
654 int len)
655 {
656 int i;
657
658 for (i = 0; i < len; i++) {
659 int err;
660 if (config[i].pingroup < 0 ||
661 config[i].pingroup >= pingroup_max) {
662 WARN_ON(1);
663 continue;
664 }
665 err = tegra_pinmux_set_func(&config[i]);
666 if (err < 0)
667 pr_err("%s: tegra_pinmux_set_func returned %d setting "
668 "%s to %s\n", __func__, err,
669 pingroup_name(config[i].pingroup),
670 func_name(config[i].func));
671 }
672 }
673
674 void tegra_pinmux_config_tristate_table(const struct tegra_pingroup_config *config,
675 int len, enum tegra_tristate tristate)
676 {
677 int i;
678 int err;
679 int pingroup;
680
681 for (i = 0; i < len; i++) {
682 pingroup = config[i].pingroup;
683 if (pingroups[pingroup].tri_reg >= 0) {
684 err = tegra_pinmux_set_tristate(pingroup, tristate);
685 if (err < 0)
686 pr_err("pinmux: can't set pingroup %s tristate"
687 " to %s: %d\n", pingroup_name(pingroup),
688 tri_name(tristate), err);
689 }
690 }
691 }
692
693 void tegra_pinmux_config_pullupdown_table(const struct tegra_pingroup_config *config,
694 int len, enum tegra_pullupdown pupd)
695 {
696 int i;
697 int err;
698 int pingroup;
699
700 for (i = 0; i < len; i++) {
701 pingroup = config[i].pingroup;
702 if (pingroups[pingroup].pupd_reg >= 0) {
703 err = tegra_pinmux_set_pullupdown(pingroup, pupd);
704 if (err < 0)
705 pr_err("pinmux: can't set pingroup %s pullupdown"
706 " to %s: %d\n", pingroup_name(pingroup),
707 pupd_name(pupd), err);
708 }
709 }
710 }
711
712 static struct of_device_id tegra_pinmux_of_match[] __devinitdata = {
713 #ifdef CONFIG_ARCH_TEGRA_2x_SOC
714 { .compatible = "nvidia,tegra20-pinmux", tegra20_pinmux_init },
715 #endif
716 #ifdef CONFIG_ARCH_TEGRA_3x_SOC
717 { .compatible = "nvidia,tegra30-pinmux", tegra30_pinmux_init },
718 #endif
719 { },
720 };
721
722 static int __devinit tegra_pinmux_probe(struct platform_device *pdev)
723 {
724 struct resource *res;
725 int i;
726 int config_bad = 0;
727 const struct of_device_id *match;
728
729 match = of_match_device(tegra_pinmux_of_match, &pdev->dev);
730
731 if (match)
732 ((pinmux_init)(match->data))(&pingroups, &pingroup_max,
733 &drive_pingroups, &drive_max);
734 #ifdef CONFIG_ARCH_TEGRA_2x_SOC
735 else
736 /* no device tree available, so we must be on tegra20 */
737 tegra20_pinmux_init(&pingroups, &pingroup_max,
738 &drive_pingroups, &drive_max);
739 #else
740 pr_warn("non Tegra20 platform requires pinmux devicetree node\n");
741 #endif
742
743 for (i = 0; ; i++) {
744 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
745 if (!res)
746 break;
747 }
748 nbanks = i;
749
750 for (i = 0; i < pingroup_max; i++) {
751 if (pingroups[i].tri_bank >= nbanks) {
752 dev_err(&pdev->dev, "pingroup %d: bad tri_bank\n", i);
753 config_bad = 1;
754 }
755
756 if (pingroups[i].mux_bank >= nbanks) {
757 dev_err(&pdev->dev, "pingroup %d: bad mux_bank\n", i);
758 config_bad = 1;
759 }
760
761 if (pingroups[i].pupd_bank >= nbanks) {
762 dev_err(&pdev->dev, "pingroup %d: bad pupd_bank\n", i);
763 config_bad = 1;
764 }
765 }
766
767 for (i = 0; i < drive_max; i++) {
768 if (drive_pingroups[i].reg_bank >= nbanks) {
769 dev_err(&pdev->dev,
770 "drive pingroup %d: bad reg_bank\n", i);
771 config_bad = 1;
772 }
773 }
774
775 if (config_bad)
776 return -ENODEV;
777
778 regs = devm_kzalloc(&pdev->dev, nbanks * sizeof(*regs), GFP_KERNEL);
779 if (!regs) {
780 dev_err(&pdev->dev, "Can't alloc regs pointer\n");
781 return -ENODEV;
782 }
783
784 for (i = 0; i < nbanks; i++) {
785 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
786 if (!res) {
787 dev_err(&pdev->dev, "Missing MEM resource\n");
788 return -ENODEV;
789 }
790
791 if (!devm_request_mem_region(&pdev->dev, res->start,
792 resource_size(res),
793 dev_name(&pdev->dev))) {
794 dev_err(&pdev->dev,
795 "Couldn't request MEM resource %d\n", i);
796 return -ENODEV;
797 }
798
799 regs[i] = devm_ioremap(&pdev->dev, res->start,
800 resource_size(res));
801 if (!regs) {
802 dev_err(&pdev->dev, "Couldn't ioremap regs %d\n", i);
803 return -ENODEV;
804 }
805 }
806
807 return 0;
808 }
809
810 static struct platform_driver tegra_pinmux_driver = {
811 .driver = {
812 .name = "tegra-pinmux",
813 .owner = THIS_MODULE,
814 .of_match_table = tegra_pinmux_of_match,
815 },
816 .probe = tegra_pinmux_probe,
817 };
818
819 static int __init tegra_pinmux_init(void)
820 {
821 return platform_driver_register(&tegra_pinmux_driver);
822 }
823 postcore_initcall(tegra_pinmux_init);
824
825 #ifdef CONFIG_DEBUG_FS
826
827 #include <linux/debugfs.h>
828 #include <linux/seq_file.h>
829
830 static void dbg_pad_field(struct seq_file *s, int len)
831 {
832 seq_putc(s, ',');
833
834 while (len-- > -1)
835 seq_putc(s, ' ');
836 }
837
838 static int dbg_pinmux_show(struct seq_file *s, void *unused)
839 {
840 int i;
841 int len;
842
843 for (i = 0; i < pingroup_max; i++) {
844 unsigned long reg;
845 unsigned long tri;
846 unsigned long mux;
847 unsigned long pupd;
848
849 seq_printf(s, "\t{TEGRA_PINGROUP_%s", pingroups[i].name);
850 len = strlen(pingroups[i].name);
851 dbg_pad_field(s, 5 - len);
852
853 if (pingroups[i].mux_reg < 0) {
854 seq_printf(s, "TEGRA_MUX_NONE");
855 len = strlen("NONE");
856 } else {
857 reg = pg_readl(pingroups[i].mux_bank,
858 pingroups[i].mux_reg);
859 mux = (reg >> pingroups[i].mux_bit) & 0x3;
860 if (pingroups[i].funcs[mux] == TEGRA_MUX_RSVD) {
861 seq_printf(s, "TEGRA_MUX_RSVD%1lu", mux+1);
862 len = 5;
863 } else {
864 seq_printf(s, "TEGRA_MUX_%s",
865 tegra_mux_names[pingroups[i].funcs[mux]]);
866 len = strlen(tegra_mux_names[pingroups[i].funcs[mux]]);
867 }
868 }
869 dbg_pad_field(s, 13-len);
870
871 if (pingroups[i].pupd_reg < 0) {
872 seq_printf(s, "TEGRA_PUPD_NORMAL");
873 len = strlen("NORMAL");
874 } else {
875 reg = pg_readl(pingroups[i].pupd_bank,
876 pingroups[i].pupd_reg);
877 pupd = (reg >> pingroups[i].pupd_bit) & 0x3;
878 seq_printf(s, "TEGRA_PUPD_%s", pupd_name(pupd));
879 len = strlen(pupd_name(pupd));
880 }
881 dbg_pad_field(s, 9 - len);
882
883 if (pingroups[i].tri_reg < 0) {
884 seq_printf(s, "TEGRA_TRI_NORMAL");
885 } else {
886 reg = pg_readl(pingroups[i].tri_bank,
887 pingroups[i].tri_reg);
888 tri = (reg >> pingroups[i].tri_bit) & 0x1;
889
890 seq_printf(s, "TEGRA_TRI_%s", tri_name(tri));
891 }
892 seq_printf(s, "},\n");
893 }
894 return 0;
895 }
896
897 static int dbg_pinmux_open(struct inode *inode, struct file *file)
898 {
899 return single_open(file, dbg_pinmux_show, &inode->i_private);
900 }
901
902 static const struct file_operations debug_fops = {
903 .open = dbg_pinmux_open,
904 .read = seq_read,
905 .llseek = seq_lseek,
906 .release = single_release,
907 };
908
909 static int dbg_drive_pinmux_show(struct seq_file *s, void *unused)
910 {
911 int i;
912 int len;
913
914 for (i = 0; i < drive_max; i++) {
915 u32 reg;
916
917 seq_printf(s, "\t{TEGRA_DRIVE_PINGROUP_%s",
918 drive_pingroups[i].name);
919 len = strlen(drive_pingroups[i].name);
920 dbg_pad_field(s, 7 - len);
921
922
923 reg = pg_readl(drive_pingroups[i].reg_bank,
924 drive_pingroups[i].reg);
925 if (HSM_EN(reg)) {
926 seq_printf(s, "TEGRA_HSM_ENABLE");
927 len = 16;
928 } else {
929 seq_printf(s, "TEGRA_HSM_DISABLE");
930 len = 17;
931 }
932 dbg_pad_field(s, 17 - len);
933
934 if (SCHMT_EN(reg)) {
935 seq_printf(s, "TEGRA_SCHMITT_ENABLE");
936 len = 21;
937 } else {
938 seq_printf(s, "TEGRA_SCHMITT_DISABLE");
939 len = 22;
940 }
941 dbg_pad_field(s, 22 - len);
942
943 seq_printf(s, "TEGRA_DRIVE_%s", drive_name(LPMD(reg)));
944 len = strlen(drive_name(LPMD(reg)));
945 dbg_pad_field(s, 5 - len);
946
947 seq_printf(s, "TEGRA_PULL_%d", DRVDN(reg));
948 len = DRVDN(reg) < 10 ? 1 : 2;
949 dbg_pad_field(s, 2 - len);
950
951 seq_printf(s, "TEGRA_PULL_%d", DRVUP(reg));
952 len = DRVUP(reg) < 10 ? 1 : 2;
953 dbg_pad_field(s, 2 - len);
954
955 seq_printf(s, "TEGRA_SLEW_%s", slew_name(SLWR(reg)));
956 len = strlen(slew_name(SLWR(reg)));
957 dbg_pad_field(s, 7 - len);
958
959 seq_printf(s, "TEGRA_SLEW_%s", slew_name(SLWF(reg)));
960
961 seq_printf(s, "},\n");
962 }
963 return 0;
964 }
965
966 static int dbg_drive_pinmux_open(struct inode *inode, struct file *file)
967 {
968 return single_open(file, dbg_drive_pinmux_show, &inode->i_private);
969 }
970
971 static const struct file_operations debug_drive_fops = {
972 .open = dbg_drive_pinmux_open,
973 .read = seq_read,
974 .llseek = seq_lseek,
975 .release = single_release,
976 };
977
978 static int __init tegra_pinmux_debuginit(void)
979 {
980 (void) debugfs_create_file("tegra_pinmux", S_IRUGO,
981 NULL, NULL, &debug_fops);
982 (void) debugfs_create_file("tegra_pinmux_drive", S_IRUGO,
983 NULL, NULL, &debug_drive_fops);
984 return 0;
985 }
986 late_initcall(tegra_pinmux_debuginit);
987 #endif