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Merge 4.2-rc6 into usb-next
[mirror_ubuntu-zesty-kernel.git] / drivers / thermal / samsung / exynos_tmu.c
1 /*
2 * exynos_tmu.c - Samsung EXYNOS TMU (Thermal Management Unit)
3 *
4 * Copyright (C) 2014 Samsung Electronics
5 * Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
6 * Lukasz Majewski <l.majewski@samsung.com>
7 *
8 * Copyright (C) 2011 Samsung Electronics
9 * Donggeun Kim <dg77.kim@samsung.com>
10 * Amit Daniel Kachhap <amit.kachhap@linaro.org>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 *
26 */
27
28 #include <linux/clk.h>
29 #include <linux/io.h>
30 #include <linux/interrupt.h>
31 #include <linux/module.h>
32 #include <linux/of.h>
33 #include <linux/of_address.h>
34 #include <linux/of_irq.h>
35 #include <linux/platform_device.h>
36 #include <linux/regulator/consumer.h>
37
38 #include "exynos_tmu.h"
39 #include "../thermal_core.h"
40
41 /* Exynos generic registers */
42 #define EXYNOS_TMU_REG_TRIMINFO 0x0
43 #define EXYNOS_TMU_REG_CONTROL 0x20
44 #define EXYNOS_TMU_REG_STATUS 0x28
45 #define EXYNOS_TMU_REG_CURRENT_TEMP 0x40
46 #define EXYNOS_TMU_REG_INTEN 0x70
47 #define EXYNOS_TMU_REG_INTSTAT 0x74
48 #define EXYNOS_TMU_REG_INTCLEAR 0x78
49
50 #define EXYNOS_TMU_TEMP_MASK 0xff
51 #define EXYNOS_TMU_REF_VOLTAGE_SHIFT 24
52 #define EXYNOS_TMU_REF_VOLTAGE_MASK 0x1f
53 #define EXYNOS_TMU_BUF_SLOPE_SEL_MASK 0xf
54 #define EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT 8
55 #define EXYNOS_TMU_CORE_EN_SHIFT 0
56
57 /* Exynos3250 specific registers */
58 #define EXYNOS_TMU_TRIMINFO_CON1 0x10
59
60 /* Exynos4210 specific registers */
61 #define EXYNOS4210_TMU_REG_THRESHOLD_TEMP 0x44
62 #define EXYNOS4210_TMU_REG_TRIG_LEVEL0 0x50
63
64 /* Exynos5250, Exynos4412, Exynos3250 specific registers */
65 #define EXYNOS_TMU_TRIMINFO_CON2 0x14
66 #define EXYNOS_THD_TEMP_RISE 0x50
67 #define EXYNOS_THD_TEMP_FALL 0x54
68 #define EXYNOS_EMUL_CON 0x80
69
70 #define EXYNOS_TRIMINFO_RELOAD_ENABLE 1
71 #define EXYNOS_TRIMINFO_25_SHIFT 0
72 #define EXYNOS_TRIMINFO_85_SHIFT 8
73 #define EXYNOS_TMU_TRIP_MODE_SHIFT 13
74 #define EXYNOS_TMU_TRIP_MODE_MASK 0x7
75 #define EXYNOS_TMU_THERM_TRIP_EN_SHIFT 12
76
77 #define EXYNOS_TMU_INTEN_RISE0_SHIFT 0
78 #define EXYNOS_TMU_INTEN_RISE1_SHIFT 4
79 #define EXYNOS_TMU_INTEN_RISE2_SHIFT 8
80 #define EXYNOS_TMU_INTEN_RISE3_SHIFT 12
81 #define EXYNOS_TMU_INTEN_FALL0_SHIFT 16
82
83 #define EXYNOS_EMUL_TIME 0x57F0
84 #define EXYNOS_EMUL_TIME_MASK 0xffff
85 #define EXYNOS_EMUL_TIME_SHIFT 16
86 #define EXYNOS_EMUL_DATA_SHIFT 8
87 #define EXYNOS_EMUL_DATA_MASK 0xFF
88 #define EXYNOS_EMUL_ENABLE 0x1
89
90 /* Exynos5260 specific */
91 #define EXYNOS5260_TMU_REG_INTEN 0xC0
92 #define EXYNOS5260_TMU_REG_INTSTAT 0xC4
93 #define EXYNOS5260_TMU_REG_INTCLEAR 0xC8
94 #define EXYNOS5260_EMUL_CON 0x100
95
96 /* Exynos4412 specific */
97 #define EXYNOS4412_MUX_ADDR_VALUE 6
98 #define EXYNOS4412_MUX_ADDR_SHIFT 20
99
100 /* Exynos5433 specific registers */
101 #define EXYNOS5433_TMU_REG_CONTROL1 0x024
102 #define EXYNOS5433_TMU_SAMPLING_INTERVAL 0x02c
103 #define EXYNOS5433_TMU_COUNTER_VALUE0 0x030
104 #define EXYNOS5433_TMU_COUNTER_VALUE1 0x034
105 #define EXYNOS5433_TMU_REG_CURRENT_TEMP1 0x044
106 #define EXYNOS5433_THD_TEMP_RISE3_0 0x050
107 #define EXYNOS5433_THD_TEMP_RISE7_4 0x054
108 #define EXYNOS5433_THD_TEMP_FALL3_0 0x060
109 #define EXYNOS5433_THD_TEMP_FALL7_4 0x064
110 #define EXYNOS5433_TMU_REG_INTEN 0x0c0
111 #define EXYNOS5433_TMU_REG_INTPEND 0x0c8
112 #define EXYNOS5433_TMU_EMUL_CON 0x110
113 #define EXYNOS5433_TMU_PD_DET_EN 0x130
114
115 #define EXYNOS5433_TRIMINFO_SENSOR_ID_SHIFT 16
116 #define EXYNOS5433_TRIMINFO_CALIB_SEL_SHIFT 23
117 #define EXYNOS5433_TRIMINFO_SENSOR_ID_MASK \
118 (0xf << EXYNOS5433_TRIMINFO_SENSOR_ID_SHIFT)
119 #define EXYNOS5433_TRIMINFO_CALIB_SEL_MASK BIT(23)
120
121 #define EXYNOS5433_TRIMINFO_ONE_POINT_TRIMMING 0
122 #define EXYNOS5433_TRIMINFO_TWO_POINT_TRIMMING 1
123
124 #define EXYNOS5433_PD_DET_EN 1
125
126 /*exynos5440 specific registers*/
127 #define EXYNOS5440_TMU_S0_7_TRIM 0x000
128 #define EXYNOS5440_TMU_S0_7_CTRL 0x020
129 #define EXYNOS5440_TMU_S0_7_DEBUG 0x040
130 #define EXYNOS5440_TMU_S0_7_TEMP 0x0f0
131 #define EXYNOS5440_TMU_S0_7_TH0 0x110
132 #define EXYNOS5440_TMU_S0_7_TH1 0x130
133 #define EXYNOS5440_TMU_S0_7_TH2 0x150
134 #define EXYNOS5440_TMU_S0_7_IRQEN 0x210
135 #define EXYNOS5440_TMU_S0_7_IRQ 0x230
136 /* exynos5440 common registers */
137 #define EXYNOS5440_TMU_IRQ_STATUS 0x000
138 #define EXYNOS5440_TMU_PMIN 0x004
139
140 #define EXYNOS5440_TMU_INTEN_RISE0_SHIFT 0
141 #define EXYNOS5440_TMU_INTEN_RISE1_SHIFT 1
142 #define EXYNOS5440_TMU_INTEN_RISE2_SHIFT 2
143 #define EXYNOS5440_TMU_INTEN_RISE3_SHIFT 3
144 #define EXYNOS5440_TMU_INTEN_FALL0_SHIFT 4
145 #define EXYNOS5440_TMU_TH_RISE4_SHIFT 24
146 #define EXYNOS5440_EFUSE_SWAP_OFFSET 8
147
148 /* Exynos7 specific registers */
149 #define EXYNOS7_THD_TEMP_RISE7_6 0x50
150 #define EXYNOS7_THD_TEMP_FALL7_6 0x60
151 #define EXYNOS7_TMU_REG_INTEN 0x110
152 #define EXYNOS7_TMU_REG_INTPEND 0x118
153 #define EXYNOS7_TMU_REG_EMUL_CON 0x160
154
155 #define EXYNOS7_TMU_TEMP_MASK 0x1ff
156 #define EXYNOS7_PD_DET_EN_SHIFT 23
157 #define EXYNOS7_TMU_INTEN_RISE0_SHIFT 0
158 #define EXYNOS7_TMU_INTEN_RISE1_SHIFT 1
159 #define EXYNOS7_TMU_INTEN_RISE2_SHIFT 2
160 #define EXYNOS7_TMU_INTEN_RISE3_SHIFT 3
161 #define EXYNOS7_TMU_INTEN_RISE4_SHIFT 4
162 #define EXYNOS7_TMU_INTEN_RISE5_SHIFT 5
163 #define EXYNOS7_TMU_INTEN_RISE6_SHIFT 6
164 #define EXYNOS7_TMU_INTEN_RISE7_SHIFT 7
165 #define EXYNOS7_EMUL_DATA_SHIFT 7
166 #define EXYNOS7_EMUL_DATA_MASK 0x1ff
167
168 #define MCELSIUS 1000
169 /**
170 * struct exynos_tmu_data : A structure to hold the private data of the TMU
171 driver
172 * @id: identifier of the one instance of the TMU controller.
173 * @pdata: pointer to the tmu platform/configuration data
174 * @base: base address of the single instance of the TMU controller.
175 * @base_second: base address of the common registers of the TMU controller.
176 * @irq: irq number of the TMU controller.
177 * @soc: id of the SOC type.
178 * @irq_work: pointer to the irq work structure.
179 * @lock: lock to implement synchronization.
180 * @clk: pointer to the clock structure.
181 * @clk_sec: pointer to the clock structure for accessing the base_second.
182 * @sclk: pointer to the clock structure for accessing the tmu special clk.
183 * @temp_error1: fused value of the first point trim.
184 * @temp_error2: fused value of the second point trim.
185 * @regulator: pointer to the TMU regulator structure.
186 * @reg_conf: pointer to structure to register with core thermal.
187 * @tmu_initialize: SoC specific TMU initialization method
188 * @tmu_control: SoC specific TMU control method
189 * @tmu_read: SoC specific TMU temperature read method
190 * @tmu_set_emulation: SoC specific TMU emulation setting method
191 * @tmu_clear_irqs: SoC specific TMU interrupts clearing method
192 */
193 struct exynos_tmu_data {
194 int id;
195 struct exynos_tmu_platform_data *pdata;
196 void __iomem *base;
197 void __iomem *base_second;
198 int irq;
199 enum soc_type soc;
200 struct work_struct irq_work;
201 struct mutex lock;
202 struct clk *clk, *clk_sec, *sclk;
203 u16 temp_error1, temp_error2;
204 struct regulator *regulator;
205 struct thermal_zone_device *tzd;
206
207 int (*tmu_initialize)(struct platform_device *pdev);
208 void (*tmu_control)(struct platform_device *pdev, bool on);
209 int (*tmu_read)(struct exynos_tmu_data *data);
210 void (*tmu_set_emulation)(struct exynos_tmu_data *data,
211 unsigned long temp);
212 void (*tmu_clear_irqs)(struct exynos_tmu_data *data);
213 };
214
215 static void exynos_report_trigger(struct exynos_tmu_data *p)
216 {
217 char data[10], *envp[] = { data, NULL };
218 struct thermal_zone_device *tz = p->tzd;
219 unsigned long temp;
220 unsigned int i;
221
222 if (!tz) {
223 pr_err("No thermal zone device defined\n");
224 return;
225 }
226
227 thermal_zone_device_update(tz);
228
229 mutex_lock(&tz->lock);
230 /* Find the level for which trip happened */
231 for (i = 0; i < of_thermal_get_ntrips(tz); i++) {
232 tz->ops->get_trip_temp(tz, i, &temp);
233 if (tz->last_temperature < temp)
234 break;
235 }
236
237 snprintf(data, sizeof(data), "%u", i);
238 kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, envp);
239 mutex_unlock(&tz->lock);
240 }
241
242 /*
243 * TMU treats temperature as a mapped temperature code.
244 * The temperature is converted differently depending on the calibration type.
245 */
246 static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
247 {
248 struct exynos_tmu_platform_data *pdata = data->pdata;
249 int temp_code;
250
251 switch (pdata->cal_type) {
252 case TYPE_TWO_POINT_TRIMMING:
253 temp_code = (temp - pdata->first_point_trim) *
254 (data->temp_error2 - data->temp_error1) /
255 (pdata->second_point_trim - pdata->first_point_trim) +
256 data->temp_error1;
257 break;
258 case TYPE_ONE_POINT_TRIMMING:
259 temp_code = temp + data->temp_error1 - pdata->first_point_trim;
260 break;
261 default:
262 temp_code = temp + pdata->default_temp_offset;
263 break;
264 }
265
266 return temp_code;
267 }
268
269 /*
270 * Calculate a temperature value from a temperature code.
271 * The unit of the temperature is degree Celsius.
272 */
273 static int code_to_temp(struct exynos_tmu_data *data, u16 temp_code)
274 {
275 struct exynos_tmu_platform_data *pdata = data->pdata;
276 int temp;
277
278 switch (pdata->cal_type) {
279 case TYPE_TWO_POINT_TRIMMING:
280 temp = (temp_code - data->temp_error1) *
281 (pdata->second_point_trim - pdata->first_point_trim) /
282 (data->temp_error2 - data->temp_error1) +
283 pdata->first_point_trim;
284 break;
285 case TYPE_ONE_POINT_TRIMMING:
286 temp = temp_code - data->temp_error1 + pdata->first_point_trim;
287 break;
288 default:
289 temp = temp_code - pdata->default_temp_offset;
290 break;
291 }
292
293 return temp;
294 }
295
296 static void sanitize_temp_error(struct exynos_tmu_data *data, u32 trim_info)
297 {
298 struct exynos_tmu_platform_data *pdata = data->pdata;
299
300 data->temp_error1 = trim_info & EXYNOS_TMU_TEMP_MASK;
301 data->temp_error2 = ((trim_info >> EXYNOS_TRIMINFO_85_SHIFT) &
302 EXYNOS_TMU_TEMP_MASK);
303
304 if (!data->temp_error1 ||
305 (pdata->min_efuse_value > data->temp_error1) ||
306 (data->temp_error1 > pdata->max_efuse_value))
307 data->temp_error1 = pdata->efuse_value & EXYNOS_TMU_TEMP_MASK;
308
309 if (!data->temp_error2)
310 data->temp_error2 =
311 (pdata->efuse_value >> EXYNOS_TRIMINFO_85_SHIFT) &
312 EXYNOS_TMU_TEMP_MASK;
313 }
314
315 static u32 get_th_reg(struct exynos_tmu_data *data, u32 threshold, bool falling)
316 {
317 struct thermal_zone_device *tz = data->tzd;
318 const struct thermal_trip * const trips =
319 of_thermal_get_trip_points(tz);
320 unsigned long temp;
321 int i;
322
323 if (!trips) {
324 pr_err("%s: Cannot get trip points from of-thermal.c!\n",
325 __func__);
326 return 0;
327 }
328
329 for (i = 0; i < of_thermal_get_ntrips(tz); i++) {
330 if (trips[i].type == THERMAL_TRIP_CRITICAL)
331 continue;
332
333 temp = trips[i].temperature / MCELSIUS;
334 if (falling)
335 temp -= (trips[i].hysteresis / MCELSIUS);
336 else
337 threshold &= ~(0xff << 8 * i);
338
339 threshold |= temp_to_code(data, temp) << 8 * i;
340 }
341
342 return threshold;
343 }
344
345 static int exynos_tmu_initialize(struct platform_device *pdev)
346 {
347 struct exynos_tmu_data *data = platform_get_drvdata(pdev);
348 int ret;
349
350 mutex_lock(&data->lock);
351 clk_enable(data->clk);
352 if (!IS_ERR(data->clk_sec))
353 clk_enable(data->clk_sec);
354 ret = data->tmu_initialize(pdev);
355 clk_disable(data->clk);
356 mutex_unlock(&data->lock);
357 if (!IS_ERR(data->clk_sec))
358 clk_disable(data->clk_sec);
359
360 return ret;
361 }
362
363 static u32 get_con_reg(struct exynos_tmu_data *data, u32 con)
364 {
365 struct exynos_tmu_platform_data *pdata = data->pdata;
366
367 if (data->soc == SOC_ARCH_EXYNOS4412 ||
368 data->soc == SOC_ARCH_EXYNOS3250)
369 con |= (EXYNOS4412_MUX_ADDR_VALUE << EXYNOS4412_MUX_ADDR_SHIFT);
370
371 con &= ~(EXYNOS_TMU_REF_VOLTAGE_MASK << EXYNOS_TMU_REF_VOLTAGE_SHIFT);
372 con |= pdata->reference_voltage << EXYNOS_TMU_REF_VOLTAGE_SHIFT;
373
374 con &= ~(EXYNOS_TMU_BUF_SLOPE_SEL_MASK << EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT);
375 con |= (pdata->gain << EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT);
376
377 if (pdata->noise_cancel_mode) {
378 con &= ~(EXYNOS_TMU_TRIP_MODE_MASK << EXYNOS_TMU_TRIP_MODE_SHIFT);
379 con |= (pdata->noise_cancel_mode << EXYNOS_TMU_TRIP_MODE_SHIFT);
380 }
381
382 return con;
383 }
384
385 static void exynos_tmu_control(struct platform_device *pdev, bool on)
386 {
387 struct exynos_tmu_data *data = platform_get_drvdata(pdev);
388
389 mutex_lock(&data->lock);
390 clk_enable(data->clk);
391 data->tmu_control(pdev, on);
392 clk_disable(data->clk);
393 mutex_unlock(&data->lock);
394 }
395
396 static int exynos4210_tmu_initialize(struct platform_device *pdev)
397 {
398 struct exynos_tmu_data *data = platform_get_drvdata(pdev);
399 struct thermal_zone_device *tz = data->tzd;
400 const struct thermal_trip * const trips =
401 of_thermal_get_trip_points(tz);
402 int ret = 0, threshold_code, i;
403 unsigned long reference, temp;
404 unsigned int status;
405
406 if (!trips) {
407 pr_err("%s: Cannot get trip points from of-thermal.c!\n",
408 __func__);
409 ret = -ENODEV;
410 goto out;
411 }
412
413 status = readb(data->base + EXYNOS_TMU_REG_STATUS);
414 if (!status) {
415 ret = -EBUSY;
416 goto out;
417 }
418
419 sanitize_temp_error(data, readl(data->base + EXYNOS_TMU_REG_TRIMINFO));
420
421 /* Write temperature code for threshold */
422 reference = trips[0].temperature / MCELSIUS;
423 threshold_code = temp_to_code(data, reference);
424 if (threshold_code < 0) {
425 ret = threshold_code;
426 goto out;
427 }
428 writeb(threshold_code, data->base + EXYNOS4210_TMU_REG_THRESHOLD_TEMP);
429
430 for (i = 0; i < of_thermal_get_ntrips(tz); i++) {
431 temp = trips[i].temperature / MCELSIUS;
432 writeb(temp - reference, data->base +
433 EXYNOS4210_TMU_REG_TRIG_LEVEL0 + i * 4);
434 }
435
436 data->tmu_clear_irqs(data);
437 out:
438 return ret;
439 }
440
441 static int exynos4412_tmu_initialize(struct platform_device *pdev)
442 {
443 struct exynos_tmu_data *data = platform_get_drvdata(pdev);
444 const struct thermal_trip * const trips =
445 of_thermal_get_trip_points(data->tzd);
446 unsigned int status, trim_info, con, ctrl, rising_threshold;
447 int ret = 0, threshold_code, i;
448 unsigned long crit_temp = 0;
449
450 status = readb(data->base + EXYNOS_TMU_REG_STATUS);
451 if (!status) {
452 ret = -EBUSY;
453 goto out;
454 }
455
456 if (data->soc == SOC_ARCH_EXYNOS3250 ||
457 data->soc == SOC_ARCH_EXYNOS4412 ||
458 data->soc == SOC_ARCH_EXYNOS5250) {
459 if (data->soc == SOC_ARCH_EXYNOS3250) {
460 ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON1);
461 ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE;
462 writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON1);
463 }
464 ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON2);
465 ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE;
466 writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON2);
467 }
468
469 /* On exynos5420 the triminfo register is in the shared space */
470 if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO)
471 trim_info = readl(data->base_second + EXYNOS_TMU_REG_TRIMINFO);
472 else
473 trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
474
475 sanitize_temp_error(data, trim_info);
476
477 /* Write temperature code for rising and falling threshold */
478 rising_threshold = readl(data->base + EXYNOS_THD_TEMP_RISE);
479 rising_threshold = get_th_reg(data, rising_threshold, false);
480 writel(rising_threshold, data->base + EXYNOS_THD_TEMP_RISE);
481 writel(get_th_reg(data, 0, true), data->base + EXYNOS_THD_TEMP_FALL);
482
483 data->tmu_clear_irqs(data);
484
485 /* if last threshold limit is also present */
486 for (i = 0; i < of_thermal_get_ntrips(data->tzd); i++) {
487 if (trips[i].type == THERMAL_TRIP_CRITICAL) {
488 crit_temp = trips[i].temperature;
489 break;
490 }
491 }
492
493 if (i == of_thermal_get_ntrips(data->tzd)) {
494 pr_err("%s: No CRITICAL trip point defined at of-thermal.c!\n",
495 __func__);
496 ret = -EINVAL;
497 goto out;
498 }
499
500 threshold_code = temp_to_code(data, crit_temp / MCELSIUS);
501 /* 1-4 level to be assigned in th0 reg */
502 rising_threshold &= ~(0xff << 8 * i);
503 rising_threshold |= threshold_code << 8 * i;
504 writel(rising_threshold, data->base + EXYNOS_THD_TEMP_RISE);
505 con = readl(data->base + EXYNOS_TMU_REG_CONTROL);
506 con |= (1 << EXYNOS_TMU_THERM_TRIP_EN_SHIFT);
507 writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
508
509 out:
510 return ret;
511 }
512
513 static int exynos5433_tmu_initialize(struct platform_device *pdev)
514 {
515 struct exynos_tmu_data *data = platform_get_drvdata(pdev);
516 struct exynos_tmu_platform_data *pdata = data->pdata;
517 struct thermal_zone_device *tz = data->tzd;
518 unsigned int status, trim_info;
519 unsigned int rising_threshold = 0, falling_threshold = 0;
520 unsigned long temp, temp_hist;
521 int ret = 0, threshold_code, i, sensor_id, cal_type;
522
523 status = readb(data->base + EXYNOS_TMU_REG_STATUS);
524 if (!status) {
525 ret = -EBUSY;
526 goto out;
527 }
528
529 trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
530 sanitize_temp_error(data, trim_info);
531
532 /* Read the temperature sensor id */
533 sensor_id = (trim_info & EXYNOS5433_TRIMINFO_SENSOR_ID_MASK)
534 >> EXYNOS5433_TRIMINFO_SENSOR_ID_SHIFT;
535 dev_info(&pdev->dev, "Temperature sensor ID: 0x%x\n", sensor_id);
536
537 /* Read the calibration mode */
538 writel(trim_info, data->base + EXYNOS_TMU_REG_TRIMINFO);
539 cal_type = (trim_info & EXYNOS5433_TRIMINFO_CALIB_SEL_MASK)
540 >> EXYNOS5433_TRIMINFO_CALIB_SEL_SHIFT;
541
542 switch (cal_type) {
543 case EXYNOS5433_TRIMINFO_ONE_POINT_TRIMMING:
544 pdata->cal_type = TYPE_ONE_POINT_TRIMMING;
545 break;
546 case EXYNOS5433_TRIMINFO_TWO_POINT_TRIMMING:
547 pdata->cal_type = TYPE_TWO_POINT_TRIMMING;
548 break;
549 default:
550 pdata->cal_type = TYPE_ONE_POINT_TRIMMING;
551 break;
552 };
553
554 dev_info(&pdev->dev, "Calibration type is %d-point calibration\n",
555 cal_type ? 2 : 1);
556
557 /* Write temperature code for rising and falling threshold */
558 for (i = 0; i < of_thermal_get_ntrips(tz); i++) {
559 int rising_reg_offset, falling_reg_offset;
560 int j = 0;
561
562 switch (i) {
563 case 0:
564 case 1:
565 case 2:
566 case 3:
567 rising_reg_offset = EXYNOS5433_THD_TEMP_RISE3_0;
568 falling_reg_offset = EXYNOS5433_THD_TEMP_FALL3_0;
569 j = i;
570 break;
571 case 4:
572 case 5:
573 case 6:
574 case 7:
575 rising_reg_offset = EXYNOS5433_THD_TEMP_RISE7_4;
576 falling_reg_offset = EXYNOS5433_THD_TEMP_FALL7_4;
577 j = i - 4;
578 break;
579 default:
580 continue;
581 }
582
583 /* Write temperature code for rising threshold */
584 tz->ops->get_trip_temp(tz, i, &temp);
585 temp /= MCELSIUS;
586 threshold_code = temp_to_code(data, temp);
587
588 rising_threshold = readl(data->base + rising_reg_offset);
589 rising_threshold |= (threshold_code << j * 8);
590 writel(rising_threshold, data->base + rising_reg_offset);
591
592 /* Write temperature code for falling threshold */
593 tz->ops->get_trip_hyst(tz, i, &temp_hist);
594 temp_hist = temp - (temp_hist / MCELSIUS);
595 threshold_code = temp_to_code(data, temp_hist);
596
597 falling_threshold = readl(data->base + falling_reg_offset);
598 falling_threshold &= ~(0xff << j * 8);
599 falling_threshold |= (threshold_code << j * 8);
600 writel(falling_threshold, data->base + falling_reg_offset);
601 }
602
603 data->tmu_clear_irqs(data);
604 out:
605 return ret;
606 }
607
608 static int exynos5440_tmu_initialize(struct platform_device *pdev)
609 {
610 struct exynos_tmu_data *data = platform_get_drvdata(pdev);
611 unsigned int trim_info = 0, con, rising_threshold;
612 int ret = 0, threshold_code;
613 unsigned long crit_temp = 0;
614
615 /*
616 * For exynos5440 soc triminfo value is swapped between TMU0 and
617 * TMU2, so the below logic is needed.
618 */
619 switch (data->id) {
620 case 0:
621 trim_info = readl(data->base + EXYNOS5440_EFUSE_SWAP_OFFSET +
622 EXYNOS5440_TMU_S0_7_TRIM);
623 break;
624 case 1:
625 trim_info = readl(data->base + EXYNOS5440_TMU_S0_7_TRIM);
626 break;
627 case 2:
628 trim_info = readl(data->base - EXYNOS5440_EFUSE_SWAP_OFFSET +
629 EXYNOS5440_TMU_S0_7_TRIM);
630 }
631 sanitize_temp_error(data, trim_info);
632
633 /* Write temperature code for rising and falling threshold */
634 rising_threshold = readl(data->base + EXYNOS5440_TMU_S0_7_TH0);
635 rising_threshold = get_th_reg(data, rising_threshold, false);
636 writel(rising_threshold, data->base + EXYNOS5440_TMU_S0_7_TH0);
637 writel(0, data->base + EXYNOS5440_TMU_S0_7_TH1);
638
639 data->tmu_clear_irqs(data);
640
641 /* if last threshold limit is also present */
642 if (!data->tzd->ops->get_crit_temp(data->tzd, &crit_temp)) {
643 threshold_code = temp_to_code(data, crit_temp / MCELSIUS);
644 /* 5th level to be assigned in th2 reg */
645 rising_threshold =
646 threshold_code << EXYNOS5440_TMU_TH_RISE4_SHIFT;
647 writel(rising_threshold, data->base + EXYNOS5440_TMU_S0_7_TH2);
648 con = readl(data->base + EXYNOS5440_TMU_S0_7_CTRL);
649 con |= (1 << EXYNOS_TMU_THERM_TRIP_EN_SHIFT);
650 writel(con, data->base + EXYNOS5440_TMU_S0_7_CTRL);
651 }
652 /* Clear the PMIN in the common TMU register */
653 if (!data->id)
654 writel(0, data->base_second + EXYNOS5440_TMU_PMIN);
655 return ret;
656 }
657
658 static int exynos7_tmu_initialize(struct platform_device *pdev)
659 {
660 struct exynos_tmu_data *data = platform_get_drvdata(pdev);
661 struct thermal_zone_device *tz = data->tzd;
662 struct exynos_tmu_platform_data *pdata = data->pdata;
663 unsigned int status, trim_info;
664 unsigned int rising_threshold = 0, falling_threshold = 0;
665 int ret = 0, threshold_code, i;
666 unsigned long temp, temp_hist;
667 unsigned int reg_off, bit_off;
668
669 status = readb(data->base + EXYNOS_TMU_REG_STATUS);
670 if (!status) {
671 ret = -EBUSY;
672 goto out;
673 }
674
675 trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
676
677 data->temp_error1 = trim_info & EXYNOS7_TMU_TEMP_MASK;
678 if (!data->temp_error1 ||
679 (pdata->min_efuse_value > data->temp_error1) ||
680 (data->temp_error1 > pdata->max_efuse_value))
681 data->temp_error1 = pdata->efuse_value & EXYNOS_TMU_TEMP_MASK;
682
683 /* Write temperature code for rising and falling threshold */
684 for (i = (of_thermal_get_ntrips(tz) - 1); i >= 0; i--) {
685 /*
686 * On exynos7 there are 4 rising and 4 falling threshold
687 * registers (0x50-0x5c and 0x60-0x6c respectively). Each
688 * register holds the value of two threshold levels (at bit
689 * offsets 0 and 16). Based on the fact that there are atmost
690 * eight possible trigger levels, calculate the register and
691 * bit offsets where the threshold levels are to be written.
692 *
693 * e.g. EXYNOS7_THD_TEMP_RISE7_6 (0x50)
694 * [24:16] - Threshold level 7
695 * [8:0] - Threshold level 6
696 * e.g. EXYNOS7_THD_TEMP_RISE5_4 (0x54)
697 * [24:16] - Threshold level 5
698 * [8:0] - Threshold level 4
699 *
700 * and similarly for falling thresholds.
701 *
702 * Based on the above, calculate the register and bit offsets
703 * for rising/falling threshold levels and populate them.
704 */
705 reg_off = ((7 - i) / 2) * 4;
706 bit_off = ((8 - i) % 2);
707
708 tz->ops->get_trip_temp(tz, i, &temp);
709 temp /= MCELSIUS;
710
711 tz->ops->get_trip_hyst(tz, i, &temp_hist);
712 temp_hist = temp - (temp_hist / MCELSIUS);
713
714 /* Set 9-bit temperature code for rising threshold levels */
715 threshold_code = temp_to_code(data, temp);
716 rising_threshold = readl(data->base +
717 EXYNOS7_THD_TEMP_RISE7_6 + reg_off);
718 rising_threshold &= ~(EXYNOS7_TMU_TEMP_MASK << (16 * bit_off));
719 rising_threshold |= threshold_code << (16 * bit_off);
720 writel(rising_threshold,
721 data->base + EXYNOS7_THD_TEMP_RISE7_6 + reg_off);
722
723 /* Set 9-bit temperature code for falling threshold levels */
724 threshold_code = temp_to_code(data, temp_hist);
725 falling_threshold &= ~(EXYNOS7_TMU_TEMP_MASK << (16 * bit_off));
726 falling_threshold |= threshold_code << (16 * bit_off);
727 writel(falling_threshold,
728 data->base + EXYNOS7_THD_TEMP_FALL7_6 + reg_off);
729 }
730
731 data->tmu_clear_irqs(data);
732 out:
733 return ret;
734 }
735
736 static void exynos4210_tmu_control(struct platform_device *pdev, bool on)
737 {
738 struct exynos_tmu_data *data = platform_get_drvdata(pdev);
739 struct thermal_zone_device *tz = data->tzd;
740 unsigned int con, interrupt_en;
741
742 con = get_con_reg(data, readl(data->base + EXYNOS_TMU_REG_CONTROL));
743
744 if (on) {
745 con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
746 interrupt_en =
747 (of_thermal_is_trip_valid(tz, 3)
748 << EXYNOS_TMU_INTEN_RISE3_SHIFT) |
749 (of_thermal_is_trip_valid(tz, 2)
750 << EXYNOS_TMU_INTEN_RISE2_SHIFT) |
751 (of_thermal_is_trip_valid(tz, 1)
752 << EXYNOS_TMU_INTEN_RISE1_SHIFT) |
753 (of_thermal_is_trip_valid(tz, 0)
754 << EXYNOS_TMU_INTEN_RISE0_SHIFT);
755
756 if (data->soc != SOC_ARCH_EXYNOS4210)
757 interrupt_en |=
758 interrupt_en << EXYNOS_TMU_INTEN_FALL0_SHIFT;
759 } else {
760 con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
761 interrupt_en = 0; /* Disable all interrupts */
762 }
763 writel(interrupt_en, data->base + EXYNOS_TMU_REG_INTEN);
764 writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
765 }
766
767 static void exynos5433_tmu_control(struct platform_device *pdev, bool on)
768 {
769 struct exynos_tmu_data *data = platform_get_drvdata(pdev);
770 struct thermal_zone_device *tz = data->tzd;
771 unsigned int con, interrupt_en, pd_det_en;
772
773 con = get_con_reg(data, readl(data->base + EXYNOS_TMU_REG_CONTROL));
774
775 if (on) {
776 con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
777 interrupt_en =
778 (of_thermal_is_trip_valid(tz, 7)
779 << EXYNOS7_TMU_INTEN_RISE7_SHIFT) |
780 (of_thermal_is_trip_valid(tz, 6)
781 << EXYNOS7_TMU_INTEN_RISE6_SHIFT) |
782 (of_thermal_is_trip_valid(tz, 5)
783 << EXYNOS7_TMU_INTEN_RISE5_SHIFT) |
784 (of_thermal_is_trip_valid(tz, 4)
785 << EXYNOS7_TMU_INTEN_RISE4_SHIFT) |
786 (of_thermal_is_trip_valid(tz, 3)
787 << EXYNOS7_TMU_INTEN_RISE3_SHIFT) |
788 (of_thermal_is_trip_valid(tz, 2)
789 << EXYNOS7_TMU_INTEN_RISE2_SHIFT) |
790 (of_thermal_is_trip_valid(tz, 1)
791 << EXYNOS7_TMU_INTEN_RISE1_SHIFT) |
792 (of_thermal_is_trip_valid(tz, 0)
793 << EXYNOS7_TMU_INTEN_RISE0_SHIFT);
794
795 interrupt_en |=
796 interrupt_en << EXYNOS_TMU_INTEN_FALL0_SHIFT;
797 } else {
798 con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
799 interrupt_en = 0; /* Disable all interrupts */
800 }
801
802 pd_det_en = on ? EXYNOS5433_PD_DET_EN : 0;
803
804 writel(pd_det_en, data->base + EXYNOS5433_TMU_PD_DET_EN);
805 writel(interrupt_en, data->base + EXYNOS5433_TMU_REG_INTEN);
806 writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
807 }
808
809 static void exynos5440_tmu_control(struct platform_device *pdev, bool on)
810 {
811 struct exynos_tmu_data *data = platform_get_drvdata(pdev);
812 struct thermal_zone_device *tz = data->tzd;
813 unsigned int con, interrupt_en;
814
815 con = get_con_reg(data, readl(data->base + EXYNOS5440_TMU_S0_7_CTRL));
816
817 if (on) {
818 con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
819 interrupt_en =
820 (of_thermal_is_trip_valid(tz, 3)
821 << EXYNOS5440_TMU_INTEN_RISE3_SHIFT) |
822 (of_thermal_is_trip_valid(tz, 2)
823 << EXYNOS5440_TMU_INTEN_RISE2_SHIFT) |
824 (of_thermal_is_trip_valid(tz, 1)
825 << EXYNOS5440_TMU_INTEN_RISE1_SHIFT) |
826 (of_thermal_is_trip_valid(tz, 0)
827 << EXYNOS5440_TMU_INTEN_RISE0_SHIFT);
828 interrupt_en |=
829 interrupt_en << EXYNOS5440_TMU_INTEN_FALL0_SHIFT;
830 } else {
831 con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
832 interrupt_en = 0; /* Disable all interrupts */
833 }
834 writel(interrupt_en, data->base + EXYNOS5440_TMU_S0_7_IRQEN);
835 writel(con, data->base + EXYNOS5440_TMU_S0_7_CTRL);
836 }
837
838 static void exynos7_tmu_control(struct platform_device *pdev, bool on)
839 {
840 struct exynos_tmu_data *data = platform_get_drvdata(pdev);
841 struct thermal_zone_device *tz = data->tzd;
842 unsigned int con, interrupt_en;
843
844 con = get_con_reg(data, readl(data->base + EXYNOS_TMU_REG_CONTROL));
845
846 if (on) {
847 con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
848 con |= (1 << EXYNOS7_PD_DET_EN_SHIFT);
849 interrupt_en =
850 (of_thermal_is_trip_valid(tz, 7)
851 << EXYNOS7_TMU_INTEN_RISE7_SHIFT) |
852 (of_thermal_is_trip_valid(tz, 6)
853 << EXYNOS7_TMU_INTEN_RISE6_SHIFT) |
854 (of_thermal_is_trip_valid(tz, 5)
855 << EXYNOS7_TMU_INTEN_RISE5_SHIFT) |
856 (of_thermal_is_trip_valid(tz, 4)
857 << EXYNOS7_TMU_INTEN_RISE4_SHIFT) |
858 (of_thermal_is_trip_valid(tz, 3)
859 << EXYNOS7_TMU_INTEN_RISE3_SHIFT) |
860 (of_thermal_is_trip_valid(tz, 2)
861 << EXYNOS7_TMU_INTEN_RISE2_SHIFT) |
862 (of_thermal_is_trip_valid(tz, 1)
863 << EXYNOS7_TMU_INTEN_RISE1_SHIFT) |
864 (of_thermal_is_trip_valid(tz, 0)
865 << EXYNOS7_TMU_INTEN_RISE0_SHIFT);
866
867 interrupt_en |=
868 interrupt_en << EXYNOS_TMU_INTEN_FALL0_SHIFT;
869 } else {
870 con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
871 con &= ~(1 << EXYNOS7_PD_DET_EN_SHIFT);
872 interrupt_en = 0; /* Disable all interrupts */
873 }
874
875 writel(interrupt_en, data->base + EXYNOS7_TMU_REG_INTEN);
876 writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
877 }
878
879 static int exynos_get_temp(void *p, long *temp)
880 {
881 struct exynos_tmu_data *data = p;
882
883 if (!data || !data->tmu_read)
884 return -EINVAL;
885
886 mutex_lock(&data->lock);
887 clk_enable(data->clk);
888
889 *temp = code_to_temp(data, data->tmu_read(data)) * MCELSIUS;
890
891 clk_disable(data->clk);
892 mutex_unlock(&data->lock);
893
894 return 0;
895 }
896
897 #ifdef CONFIG_THERMAL_EMULATION
898 static u32 get_emul_con_reg(struct exynos_tmu_data *data, unsigned int val,
899 unsigned long temp)
900 {
901 if (temp) {
902 temp /= MCELSIUS;
903
904 if (data->soc != SOC_ARCH_EXYNOS5440) {
905 val &= ~(EXYNOS_EMUL_TIME_MASK << EXYNOS_EMUL_TIME_SHIFT);
906 val |= (EXYNOS_EMUL_TIME << EXYNOS_EMUL_TIME_SHIFT);
907 }
908 if (data->soc == SOC_ARCH_EXYNOS7) {
909 val &= ~(EXYNOS7_EMUL_DATA_MASK <<
910 EXYNOS7_EMUL_DATA_SHIFT);
911 val |= (temp_to_code(data, temp) <<
912 EXYNOS7_EMUL_DATA_SHIFT) |
913 EXYNOS_EMUL_ENABLE;
914 } else {
915 val &= ~(EXYNOS_EMUL_DATA_MASK <<
916 EXYNOS_EMUL_DATA_SHIFT);
917 val |= (temp_to_code(data, temp) <<
918 EXYNOS_EMUL_DATA_SHIFT) |
919 EXYNOS_EMUL_ENABLE;
920 }
921 } else {
922 val &= ~EXYNOS_EMUL_ENABLE;
923 }
924
925 return val;
926 }
927
928 static void exynos4412_tmu_set_emulation(struct exynos_tmu_data *data,
929 unsigned long temp)
930 {
931 unsigned int val;
932 u32 emul_con;
933
934 if (data->soc == SOC_ARCH_EXYNOS5260)
935 emul_con = EXYNOS5260_EMUL_CON;
936 if (data->soc == SOC_ARCH_EXYNOS5433)
937 emul_con = EXYNOS5433_TMU_EMUL_CON;
938 else if (data->soc == SOC_ARCH_EXYNOS7)
939 emul_con = EXYNOS7_TMU_REG_EMUL_CON;
940 else
941 emul_con = EXYNOS_EMUL_CON;
942
943 val = readl(data->base + emul_con);
944 val = get_emul_con_reg(data, val, temp);
945 writel(val, data->base + emul_con);
946 }
947
948 static void exynos5440_tmu_set_emulation(struct exynos_tmu_data *data,
949 unsigned long temp)
950 {
951 unsigned int val;
952
953 val = readl(data->base + EXYNOS5440_TMU_S0_7_DEBUG);
954 val = get_emul_con_reg(data, val, temp);
955 writel(val, data->base + EXYNOS5440_TMU_S0_7_DEBUG);
956 }
957
958 static int exynos_tmu_set_emulation(void *drv_data, unsigned long temp)
959 {
960 struct exynos_tmu_data *data = drv_data;
961 int ret = -EINVAL;
962
963 if (data->soc == SOC_ARCH_EXYNOS4210)
964 goto out;
965
966 if (temp && temp < MCELSIUS)
967 goto out;
968
969 mutex_lock(&data->lock);
970 clk_enable(data->clk);
971 data->tmu_set_emulation(data, temp);
972 clk_disable(data->clk);
973 mutex_unlock(&data->lock);
974 return 0;
975 out:
976 return ret;
977 }
978 #else
979 #define exynos4412_tmu_set_emulation NULL
980 #define exynos5440_tmu_set_emulation NULL
981 static int exynos_tmu_set_emulation(void *drv_data, unsigned long temp)
982 { return -EINVAL; }
983 #endif /* CONFIG_THERMAL_EMULATION */
984
985 static int exynos4210_tmu_read(struct exynos_tmu_data *data)
986 {
987 int ret = readb(data->base + EXYNOS_TMU_REG_CURRENT_TEMP);
988
989 /* "temp_code" should range between 75 and 175 */
990 return (ret < 75 || ret > 175) ? -ENODATA : ret;
991 }
992
993 static int exynos4412_tmu_read(struct exynos_tmu_data *data)
994 {
995 return readb(data->base + EXYNOS_TMU_REG_CURRENT_TEMP);
996 }
997
998 static int exynos5440_tmu_read(struct exynos_tmu_data *data)
999 {
1000 return readb(data->base + EXYNOS5440_TMU_S0_7_TEMP);
1001 }
1002
1003 static int exynos7_tmu_read(struct exynos_tmu_data *data)
1004 {
1005 return readw(data->base + EXYNOS_TMU_REG_CURRENT_TEMP) &
1006 EXYNOS7_TMU_TEMP_MASK;
1007 }
1008
1009 static void exynos_tmu_work(struct work_struct *work)
1010 {
1011 struct exynos_tmu_data *data = container_of(work,
1012 struct exynos_tmu_data, irq_work);
1013 unsigned int val_type;
1014
1015 if (!IS_ERR(data->clk_sec))
1016 clk_enable(data->clk_sec);
1017 /* Find which sensor generated this interrupt */
1018 if (data->soc == SOC_ARCH_EXYNOS5440) {
1019 val_type = readl(data->base_second + EXYNOS5440_TMU_IRQ_STATUS);
1020 if (!((val_type >> data->id) & 0x1))
1021 goto out;
1022 }
1023 if (!IS_ERR(data->clk_sec))
1024 clk_disable(data->clk_sec);
1025
1026 exynos_report_trigger(data);
1027 mutex_lock(&data->lock);
1028 clk_enable(data->clk);
1029
1030 /* TODO: take action based on particular interrupt */
1031 data->tmu_clear_irqs(data);
1032
1033 clk_disable(data->clk);
1034 mutex_unlock(&data->lock);
1035 out:
1036 enable_irq(data->irq);
1037 }
1038
1039 static void exynos4210_tmu_clear_irqs(struct exynos_tmu_data *data)
1040 {
1041 unsigned int val_irq;
1042 u32 tmu_intstat, tmu_intclear;
1043
1044 if (data->soc == SOC_ARCH_EXYNOS5260) {
1045 tmu_intstat = EXYNOS5260_TMU_REG_INTSTAT;
1046 tmu_intclear = EXYNOS5260_TMU_REG_INTCLEAR;
1047 } else if (data->soc == SOC_ARCH_EXYNOS7) {
1048 tmu_intstat = EXYNOS7_TMU_REG_INTPEND;
1049 tmu_intclear = EXYNOS7_TMU_REG_INTPEND;
1050 } else if (data->soc == SOC_ARCH_EXYNOS5433) {
1051 tmu_intstat = EXYNOS5433_TMU_REG_INTPEND;
1052 tmu_intclear = EXYNOS5433_TMU_REG_INTPEND;
1053 } else {
1054 tmu_intstat = EXYNOS_TMU_REG_INTSTAT;
1055 tmu_intclear = EXYNOS_TMU_REG_INTCLEAR;
1056 }
1057
1058 val_irq = readl(data->base + tmu_intstat);
1059 /*
1060 * Clear the interrupts. Please note that the documentation for
1061 * Exynos3250, Exynos4412, Exynos5250 and Exynos5260 incorrectly
1062 * states that INTCLEAR register has a different placing of bits
1063 * responsible for FALL IRQs than INTSTAT register. Exynos5420
1064 * and Exynos5440 documentation is correct (Exynos4210 doesn't
1065 * support FALL IRQs at all).
1066 */
1067 writel(val_irq, data->base + tmu_intclear);
1068 }
1069
1070 static void exynos5440_tmu_clear_irqs(struct exynos_tmu_data *data)
1071 {
1072 unsigned int val_irq;
1073
1074 val_irq = readl(data->base + EXYNOS5440_TMU_S0_7_IRQ);
1075 /* clear the interrupts */
1076 writel(val_irq, data->base + EXYNOS5440_TMU_S0_7_IRQ);
1077 }
1078
1079 static irqreturn_t exynos_tmu_irq(int irq, void *id)
1080 {
1081 struct exynos_tmu_data *data = id;
1082
1083 disable_irq_nosync(irq);
1084 schedule_work(&data->irq_work);
1085
1086 return IRQ_HANDLED;
1087 }
1088
1089 static const struct of_device_id exynos_tmu_match[] = {
1090 { .compatible = "samsung,exynos3250-tmu", },
1091 { .compatible = "samsung,exynos4210-tmu", },
1092 { .compatible = "samsung,exynos4412-tmu", },
1093 { .compatible = "samsung,exynos5250-tmu", },
1094 { .compatible = "samsung,exynos5260-tmu", },
1095 { .compatible = "samsung,exynos5420-tmu", },
1096 { .compatible = "samsung,exynos5420-tmu-ext-triminfo", },
1097 { .compatible = "samsung,exynos5433-tmu", },
1098 { .compatible = "samsung,exynos5440-tmu", },
1099 { .compatible = "samsung,exynos7-tmu", },
1100 { /* sentinel */ },
1101 };
1102 MODULE_DEVICE_TABLE(of, exynos_tmu_match);
1103
1104 static int exynos_of_get_soc_type(struct device_node *np)
1105 {
1106 if (of_device_is_compatible(np, "samsung,exynos3250-tmu"))
1107 return SOC_ARCH_EXYNOS3250;
1108 else if (of_device_is_compatible(np, "samsung,exynos4210-tmu"))
1109 return SOC_ARCH_EXYNOS4210;
1110 else if (of_device_is_compatible(np, "samsung,exynos4412-tmu"))
1111 return SOC_ARCH_EXYNOS4412;
1112 else if (of_device_is_compatible(np, "samsung,exynos5250-tmu"))
1113 return SOC_ARCH_EXYNOS5250;
1114 else if (of_device_is_compatible(np, "samsung,exynos5260-tmu"))
1115 return SOC_ARCH_EXYNOS5260;
1116 else if (of_device_is_compatible(np, "samsung,exynos5420-tmu"))
1117 return SOC_ARCH_EXYNOS5420;
1118 else if (of_device_is_compatible(np,
1119 "samsung,exynos5420-tmu-ext-triminfo"))
1120 return SOC_ARCH_EXYNOS5420_TRIMINFO;
1121 else if (of_device_is_compatible(np, "samsung,exynos5433-tmu"))
1122 return SOC_ARCH_EXYNOS5433;
1123 else if (of_device_is_compatible(np, "samsung,exynos5440-tmu"))
1124 return SOC_ARCH_EXYNOS5440;
1125 else if (of_device_is_compatible(np, "samsung,exynos7-tmu"))
1126 return SOC_ARCH_EXYNOS7;
1127
1128 return -EINVAL;
1129 }
1130
1131 static int exynos_of_sensor_conf(struct device_node *np,
1132 struct exynos_tmu_platform_data *pdata)
1133 {
1134 u32 value;
1135 int ret;
1136
1137 of_node_get(np);
1138
1139 ret = of_property_read_u32(np, "samsung,tmu_gain", &value);
1140 pdata->gain = (u8)value;
1141 of_property_read_u32(np, "samsung,tmu_reference_voltage", &value);
1142 pdata->reference_voltage = (u8)value;
1143 of_property_read_u32(np, "samsung,tmu_noise_cancel_mode", &value);
1144 pdata->noise_cancel_mode = (u8)value;
1145
1146 of_property_read_u32(np, "samsung,tmu_efuse_value",
1147 &pdata->efuse_value);
1148 of_property_read_u32(np, "samsung,tmu_min_efuse_value",
1149 &pdata->min_efuse_value);
1150 of_property_read_u32(np, "samsung,tmu_max_efuse_value",
1151 &pdata->max_efuse_value);
1152
1153 of_property_read_u32(np, "samsung,tmu_first_point_trim", &value);
1154 pdata->first_point_trim = (u8)value;
1155 of_property_read_u32(np, "samsung,tmu_second_point_trim", &value);
1156 pdata->second_point_trim = (u8)value;
1157 of_property_read_u32(np, "samsung,tmu_default_temp_offset", &value);
1158 pdata->default_temp_offset = (u8)value;
1159
1160 of_property_read_u32(np, "samsung,tmu_cal_type", &pdata->cal_type);
1161 of_property_read_u32(np, "samsung,tmu_cal_mode", &pdata->cal_mode);
1162
1163 of_node_put(np);
1164 return 0;
1165 }
1166
1167 static int exynos_map_dt_data(struct platform_device *pdev)
1168 {
1169 struct exynos_tmu_data *data = platform_get_drvdata(pdev);
1170 struct exynos_tmu_platform_data *pdata;
1171 struct resource res;
1172 int ret;
1173
1174 if (!data || !pdev->dev.of_node)
1175 return -ENODEV;
1176
1177 /*
1178 * Try enabling the regulator if found
1179 * TODO: Add regulator as an SOC feature, so that regulator enable
1180 * is a compulsory call.
1181 */
1182 data->regulator = devm_regulator_get(&pdev->dev, "vtmu");
1183 if (!IS_ERR(data->regulator)) {
1184 ret = regulator_enable(data->regulator);
1185 if (ret) {
1186 dev_err(&pdev->dev, "failed to enable vtmu\n");
1187 return ret;
1188 }
1189 } else {
1190 dev_info(&pdev->dev, "Regulator node (vtmu) not found\n");
1191 }
1192
1193 data->id = of_alias_get_id(pdev->dev.of_node, "tmuctrl");
1194 if (data->id < 0)
1195 data->id = 0;
1196
1197 data->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
1198 if (data->irq <= 0) {
1199 dev_err(&pdev->dev, "failed to get IRQ\n");
1200 return -ENODEV;
1201 }
1202
1203 if (of_address_to_resource(pdev->dev.of_node, 0, &res)) {
1204 dev_err(&pdev->dev, "failed to get Resource 0\n");
1205 return -ENODEV;
1206 }
1207
1208 data->base = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
1209 if (!data->base) {
1210 dev_err(&pdev->dev, "Failed to ioremap memory\n");
1211 return -EADDRNOTAVAIL;
1212 }
1213
1214 pdata = devm_kzalloc(&pdev->dev,
1215 sizeof(struct exynos_tmu_platform_data),
1216 GFP_KERNEL);
1217 if (!pdata)
1218 return -ENOMEM;
1219
1220 exynos_of_sensor_conf(pdev->dev.of_node, pdata);
1221 data->pdata = pdata;
1222 data->soc = exynos_of_get_soc_type(pdev->dev.of_node);
1223
1224 switch (data->soc) {
1225 case SOC_ARCH_EXYNOS4210:
1226 data->tmu_initialize = exynos4210_tmu_initialize;
1227 data->tmu_control = exynos4210_tmu_control;
1228 data->tmu_read = exynos4210_tmu_read;
1229 data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
1230 break;
1231 case SOC_ARCH_EXYNOS3250:
1232 case SOC_ARCH_EXYNOS4412:
1233 case SOC_ARCH_EXYNOS5250:
1234 case SOC_ARCH_EXYNOS5260:
1235 case SOC_ARCH_EXYNOS5420:
1236 case SOC_ARCH_EXYNOS5420_TRIMINFO:
1237 data->tmu_initialize = exynos4412_tmu_initialize;
1238 data->tmu_control = exynos4210_tmu_control;
1239 data->tmu_read = exynos4412_tmu_read;
1240 data->tmu_set_emulation = exynos4412_tmu_set_emulation;
1241 data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
1242 break;
1243 case SOC_ARCH_EXYNOS5433:
1244 data->tmu_initialize = exynos5433_tmu_initialize;
1245 data->tmu_control = exynos5433_tmu_control;
1246 data->tmu_read = exynos4412_tmu_read;
1247 data->tmu_set_emulation = exynos4412_tmu_set_emulation;
1248 data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
1249 break;
1250 case SOC_ARCH_EXYNOS5440:
1251 data->tmu_initialize = exynos5440_tmu_initialize;
1252 data->tmu_control = exynos5440_tmu_control;
1253 data->tmu_read = exynos5440_tmu_read;
1254 data->tmu_set_emulation = exynos5440_tmu_set_emulation;
1255 data->tmu_clear_irqs = exynos5440_tmu_clear_irqs;
1256 break;
1257 case SOC_ARCH_EXYNOS7:
1258 data->tmu_initialize = exynos7_tmu_initialize;
1259 data->tmu_control = exynos7_tmu_control;
1260 data->tmu_read = exynos7_tmu_read;
1261 data->tmu_set_emulation = exynos4412_tmu_set_emulation;
1262 data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
1263 break;
1264 default:
1265 dev_err(&pdev->dev, "Platform not supported\n");
1266 return -EINVAL;
1267 }
1268
1269 /*
1270 * Check if the TMU shares some registers and then try to map the
1271 * memory of common registers.
1272 */
1273 if (data->soc != SOC_ARCH_EXYNOS5420_TRIMINFO &&
1274 data->soc != SOC_ARCH_EXYNOS5440)
1275 return 0;
1276
1277 if (of_address_to_resource(pdev->dev.of_node, 1, &res)) {
1278 dev_err(&pdev->dev, "failed to get Resource 1\n");
1279 return -ENODEV;
1280 }
1281
1282 data->base_second = devm_ioremap(&pdev->dev, res.start,
1283 resource_size(&res));
1284 if (!data->base_second) {
1285 dev_err(&pdev->dev, "Failed to ioremap memory\n");
1286 return -ENOMEM;
1287 }
1288
1289 return 0;
1290 }
1291
1292 static struct thermal_zone_of_device_ops exynos_sensor_ops = {
1293 .get_temp = exynos_get_temp,
1294 .set_emul_temp = exynos_tmu_set_emulation,
1295 };
1296
1297 static int exynos_tmu_probe(struct platform_device *pdev)
1298 {
1299 struct exynos_tmu_data *data;
1300 int ret;
1301
1302 data = devm_kzalloc(&pdev->dev, sizeof(struct exynos_tmu_data),
1303 GFP_KERNEL);
1304 if (!data)
1305 return -ENOMEM;
1306
1307 platform_set_drvdata(pdev, data);
1308 mutex_init(&data->lock);
1309
1310 data->tzd = thermal_zone_of_sensor_register(&pdev->dev, 0, data,
1311 &exynos_sensor_ops);
1312 if (IS_ERR(data->tzd)) {
1313 pr_err("thermal: tz: %p ERROR\n", data->tzd);
1314 return PTR_ERR(data->tzd);
1315 }
1316 ret = exynos_map_dt_data(pdev);
1317 if (ret)
1318 goto err_sensor;
1319
1320 INIT_WORK(&data->irq_work, exynos_tmu_work);
1321
1322 data->clk = devm_clk_get(&pdev->dev, "tmu_apbif");
1323 if (IS_ERR(data->clk)) {
1324 dev_err(&pdev->dev, "Failed to get clock\n");
1325 ret = PTR_ERR(data->clk);
1326 goto err_sensor;
1327 }
1328
1329 data->clk_sec = devm_clk_get(&pdev->dev, "tmu_triminfo_apbif");
1330 if (IS_ERR(data->clk_sec)) {
1331 if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO) {
1332 dev_err(&pdev->dev, "Failed to get triminfo clock\n");
1333 ret = PTR_ERR(data->clk_sec);
1334 goto err_sensor;
1335 }
1336 } else {
1337 ret = clk_prepare(data->clk_sec);
1338 if (ret) {
1339 dev_err(&pdev->dev, "Failed to get clock\n");
1340 goto err_sensor;
1341 }
1342 }
1343
1344 ret = clk_prepare(data->clk);
1345 if (ret) {
1346 dev_err(&pdev->dev, "Failed to get clock\n");
1347 goto err_clk_sec;
1348 }
1349
1350 switch (data->soc) {
1351 case SOC_ARCH_EXYNOS5433:
1352 case SOC_ARCH_EXYNOS7:
1353 data->sclk = devm_clk_get(&pdev->dev, "tmu_sclk");
1354 if (IS_ERR(data->sclk)) {
1355 dev_err(&pdev->dev, "Failed to get sclk\n");
1356 goto err_clk;
1357 } else {
1358 ret = clk_prepare_enable(data->sclk);
1359 if (ret) {
1360 dev_err(&pdev->dev, "Failed to enable sclk\n");
1361 goto err_clk;
1362 }
1363 }
1364 break;
1365 default:
1366 break;
1367 };
1368
1369 ret = exynos_tmu_initialize(pdev);
1370 if (ret) {
1371 dev_err(&pdev->dev, "Failed to initialize TMU\n");
1372 goto err_sclk;
1373 }
1374
1375 ret = devm_request_irq(&pdev->dev, data->irq, exynos_tmu_irq,
1376 IRQF_TRIGGER_RISING | IRQF_SHARED, dev_name(&pdev->dev), data);
1377 if (ret) {
1378 dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
1379 goto err_sclk;
1380 }
1381
1382 exynos_tmu_control(pdev, true);
1383 return 0;
1384 err_sclk:
1385 clk_disable_unprepare(data->sclk);
1386 err_clk:
1387 clk_unprepare(data->clk);
1388 err_clk_sec:
1389 if (!IS_ERR(data->clk_sec))
1390 clk_unprepare(data->clk_sec);
1391 err_sensor:
1392 if (!IS_ERR_OR_NULL(data->regulator))
1393 regulator_disable(data->regulator);
1394 thermal_zone_of_sensor_unregister(&pdev->dev, data->tzd);
1395
1396 return ret;
1397 }
1398
1399 static int exynos_tmu_remove(struct platform_device *pdev)
1400 {
1401 struct exynos_tmu_data *data = platform_get_drvdata(pdev);
1402 struct thermal_zone_device *tzd = data->tzd;
1403
1404 thermal_zone_of_sensor_unregister(&pdev->dev, tzd);
1405 exynos_tmu_control(pdev, false);
1406
1407 clk_disable_unprepare(data->sclk);
1408 clk_unprepare(data->clk);
1409 if (!IS_ERR(data->clk_sec))
1410 clk_unprepare(data->clk_sec);
1411
1412 if (!IS_ERR(data->regulator))
1413 regulator_disable(data->regulator);
1414
1415 return 0;
1416 }
1417
1418 #ifdef CONFIG_PM_SLEEP
1419 static int exynos_tmu_suspend(struct device *dev)
1420 {
1421 exynos_tmu_control(to_platform_device(dev), false);
1422
1423 return 0;
1424 }
1425
1426 static int exynos_tmu_resume(struct device *dev)
1427 {
1428 struct platform_device *pdev = to_platform_device(dev);
1429
1430 exynos_tmu_initialize(pdev);
1431 exynos_tmu_control(pdev, true);
1432
1433 return 0;
1434 }
1435
1436 static SIMPLE_DEV_PM_OPS(exynos_tmu_pm,
1437 exynos_tmu_suspend, exynos_tmu_resume);
1438 #define EXYNOS_TMU_PM (&exynos_tmu_pm)
1439 #else
1440 #define EXYNOS_TMU_PM NULL
1441 #endif
1442
1443 static struct platform_driver exynos_tmu_driver = {
1444 .driver = {
1445 .name = "exynos-tmu",
1446 .pm = EXYNOS_TMU_PM,
1447 .of_match_table = exynos_tmu_match,
1448 },
1449 .probe = exynos_tmu_probe,
1450 .remove = exynos_tmu_remove,
1451 };
1452
1453 module_platform_driver(exynos_tmu_driver);
1454
1455 MODULE_DESCRIPTION("EXYNOS TMU Driver");
1456 MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
1457 MODULE_LICENSE("GPL");
1458 MODULE_ALIAS("platform:exynos-tmu");
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