Loading...
Note: File does not exist in v3.1.
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2015 Samsung Electronics Co.Ltd
4 * Authors:
5 * Hyungwon Hwang <human.hwang@samsung.com>
6 */
7
8#include <linux/clk.h>
9#include <linux/component.h>
10#include <linux/delay.h>
11#include <linux/mfd/syscon.h>
12#include <linux/module.h>
13#include <linux/mutex.h>
14#include <linux/of.h>
15#include <linux/of_address.h>
16#include <linux/of_graph.h>
17#include <linux/platform_device.h>
18#include <linux/pm_runtime.h>
19#include <linux/regmap.h>
20
21#include <video/of_videomode.h>
22#include <video/videomode.h>
23
24#include <drm/drm_bridge.h>
25#include <drm/drm_encoder.h>
26#include <drm/drm_print.h>
27
28#include "exynos_drm_drv.h"
29
30/* Sysreg registers for MIC */
31#define DSD_CFG_MUX 0x1004
32#define MIC0_RGB_MUX (1 << 0)
33#define MIC0_I80_MUX (1 << 1)
34#define MIC0_ON_MUX (1 << 5)
35
36/* MIC registers */
37#define MIC_OP 0x0
38#define MIC_IP_VER 0x0004
39#define MIC_V_TIMING_0 0x0008
40#define MIC_V_TIMING_1 0x000C
41#define MIC_IMG_SIZE 0x0010
42#define MIC_INPUT_TIMING_0 0x0014
43#define MIC_INPUT_TIMING_1 0x0018
44#define MIC_2D_OUTPUT_TIMING_0 0x001C
45#define MIC_2D_OUTPUT_TIMING_1 0x0020
46#define MIC_2D_OUTPUT_TIMING_2 0x0024
47#define MIC_3D_OUTPUT_TIMING_0 0x0028
48#define MIC_3D_OUTPUT_TIMING_1 0x002C
49#define MIC_3D_OUTPUT_TIMING_2 0x0030
50#define MIC_CORE_PARA_0 0x0034
51#define MIC_CORE_PARA_1 0x0038
52#define MIC_CTC_CTRL 0x0040
53#define MIC_RD_DATA 0x0044
54
55#define MIC_UPD_REG (1 << 31)
56#define MIC_ON_REG (1 << 30)
57#define MIC_TD_ON_REG (1 << 29)
58#define MIC_BS_CHG_OUT (1 << 16)
59#define MIC_VIDEO_TYPE(x) (((x) & 0xf) << 12)
60#define MIC_PSR_EN (1 << 5)
61#define MIC_SW_RST (1 << 4)
62#define MIC_ALL_RST (1 << 3)
63#define MIC_CORE_VER_CONTROL (1 << 2)
64#define MIC_MODE_SEL_COMMAND_MODE (1 << 1)
65#define MIC_MODE_SEL_MASK (1 << 1)
66#define MIC_CORE_EN (1 << 0)
67
68#define MIC_V_PULSE_WIDTH(x) (((x) & 0x3fff) << 16)
69#define MIC_V_PERIOD_LINE(x) ((x) & 0x3fff)
70
71#define MIC_VBP_SIZE(x) (((x) & 0x3fff) << 16)
72#define MIC_VFP_SIZE(x) ((x) & 0x3fff)
73
74#define MIC_IMG_V_SIZE(x) (((x) & 0x3fff) << 16)
75#define MIC_IMG_H_SIZE(x) ((x) & 0x3fff)
76
77#define MIC_H_PULSE_WIDTH_IN(x) (((x) & 0x3fff) << 16)
78#define MIC_H_PERIOD_PIXEL_IN(x) ((x) & 0x3fff)
79
80#define MIC_HBP_SIZE_IN(x) (((x) & 0x3fff) << 16)
81#define MIC_HFP_SIZE_IN(x) ((x) & 0x3fff)
82
83#define MIC_H_PULSE_WIDTH_2D(x) (((x) & 0x3fff) << 16)
84#define MIC_H_PERIOD_PIXEL_2D(x) ((x) & 0x3fff)
85
86#define MIC_HBP_SIZE_2D(x) (((x) & 0x3fff) << 16)
87#define MIC_HFP_SIZE_2D(x) ((x) & 0x3fff)
88
89#define MIC_BS_SIZE_2D(x) ((x) & 0x3fff)
90
91static const char *const clk_names[] = { "pclk_mic0", "sclk_rgb_vclk_to_mic0" };
92#define NUM_CLKS ARRAY_SIZE(clk_names)
93static DEFINE_MUTEX(mic_mutex);
94
95struct exynos_mic {
96 struct device *dev;
97 void __iomem *reg;
98 struct regmap *sysreg;
99 struct clk *clks[NUM_CLKS];
100
101 bool i80_mode;
102 struct videomode vm;
103 struct drm_encoder *encoder;
104 struct drm_bridge bridge;
105
106 bool enabled;
107};
108
109static void mic_set_path(struct exynos_mic *mic, bool enable)
110{
111 int ret;
112 unsigned int val;
113
114 ret = regmap_read(mic->sysreg, DSD_CFG_MUX, &val);
115 if (ret) {
116 DRM_DEV_ERROR(mic->dev,
117 "mic: Failed to read system register\n");
118 return;
119 }
120
121 if (enable) {
122 if (mic->i80_mode)
123 val |= MIC0_I80_MUX;
124 else
125 val |= MIC0_RGB_MUX;
126
127 val |= MIC0_ON_MUX;
128 } else
129 val &= ~(MIC0_RGB_MUX | MIC0_I80_MUX | MIC0_ON_MUX);
130
131 ret = regmap_write(mic->sysreg, DSD_CFG_MUX, val);
132 if (ret)
133 DRM_DEV_ERROR(mic->dev,
134 "mic: Failed to read system register\n");
135}
136
137static int mic_sw_reset(struct exynos_mic *mic)
138{
139 unsigned int retry = 100;
140 int ret;
141
142 writel(MIC_SW_RST, mic->reg + MIC_OP);
143
144 while (retry-- > 0) {
145 ret = readl(mic->reg + MIC_OP);
146 if (!(ret & MIC_SW_RST))
147 return 0;
148
149 udelay(10);
150 }
151
152 return -ETIMEDOUT;
153}
154
155static void mic_set_porch_timing(struct exynos_mic *mic)
156{
157 struct videomode vm = mic->vm;
158 u32 reg;
159
160 reg = MIC_V_PULSE_WIDTH(vm.vsync_len) +
161 MIC_V_PERIOD_LINE(vm.vsync_len + vm.vactive +
162 vm.vback_porch + vm.vfront_porch);
163 writel(reg, mic->reg + MIC_V_TIMING_0);
164
165 reg = MIC_VBP_SIZE(vm.vback_porch) +
166 MIC_VFP_SIZE(vm.vfront_porch);
167 writel(reg, mic->reg + MIC_V_TIMING_1);
168
169 reg = MIC_V_PULSE_WIDTH(vm.hsync_len) +
170 MIC_V_PERIOD_LINE(vm.hsync_len + vm.hactive +
171 vm.hback_porch + vm.hfront_porch);
172 writel(reg, mic->reg + MIC_INPUT_TIMING_0);
173
174 reg = MIC_VBP_SIZE(vm.hback_porch) +
175 MIC_VFP_SIZE(vm.hfront_porch);
176 writel(reg, mic->reg + MIC_INPUT_TIMING_1);
177}
178
179static void mic_set_img_size(struct exynos_mic *mic)
180{
181 struct videomode *vm = &mic->vm;
182 u32 reg;
183
184 reg = MIC_IMG_H_SIZE(vm->hactive) +
185 MIC_IMG_V_SIZE(vm->vactive);
186
187 writel(reg, mic->reg + MIC_IMG_SIZE);
188}
189
190static void mic_set_output_timing(struct exynos_mic *mic)
191{
192 struct videomode vm = mic->vm;
193 u32 reg, bs_size_2d;
194
195 DRM_DEV_DEBUG(mic->dev, "w: %u, h: %u\n", vm.hactive, vm.vactive);
196 bs_size_2d = ((vm.hactive >> 2) << 1) + (vm.vactive % 4);
197 reg = MIC_BS_SIZE_2D(bs_size_2d);
198 writel(reg, mic->reg + MIC_2D_OUTPUT_TIMING_2);
199
200 if (!mic->i80_mode) {
201 reg = MIC_H_PULSE_WIDTH_2D(vm.hsync_len) +
202 MIC_H_PERIOD_PIXEL_2D(vm.hsync_len + bs_size_2d +
203 vm.hback_porch + vm.hfront_porch);
204 writel(reg, mic->reg + MIC_2D_OUTPUT_TIMING_0);
205
206 reg = MIC_HBP_SIZE_2D(vm.hback_porch) +
207 MIC_H_PERIOD_PIXEL_2D(vm.hfront_porch);
208 writel(reg, mic->reg + MIC_2D_OUTPUT_TIMING_1);
209 }
210}
211
212static void mic_set_reg_on(struct exynos_mic *mic, bool enable)
213{
214 u32 reg = readl(mic->reg + MIC_OP);
215
216 if (enable) {
217 reg &= ~(MIC_MODE_SEL_MASK | MIC_CORE_VER_CONTROL | MIC_PSR_EN);
218 reg |= (MIC_CORE_EN | MIC_BS_CHG_OUT | MIC_ON_REG);
219
220 reg &= ~MIC_MODE_SEL_COMMAND_MODE;
221 if (mic->i80_mode)
222 reg |= MIC_MODE_SEL_COMMAND_MODE;
223 } else {
224 reg &= ~MIC_CORE_EN;
225 }
226
227 reg |= MIC_UPD_REG;
228 writel(reg, mic->reg + MIC_OP);
229}
230
231static void mic_disable(struct drm_bridge *bridge) { }
232
233static void mic_post_disable(struct drm_bridge *bridge)
234{
235 struct exynos_mic *mic = bridge->driver_private;
236
237 mutex_lock(&mic_mutex);
238 if (!mic->enabled)
239 goto already_disabled;
240
241 mic_set_path(mic, 0);
242
243 pm_runtime_put(mic->dev);
244 mic->enabled = 0;
245
246already_disabled:
247 mutex_unlock(&mic_mutex);
248}
249
250static void mic_mode_set(struct drm_bridge *bridge,
251 const struct drm_display_mode *mode,
252 const struct drm_display_mode *adjusted_mode)
253{
254 struct exynos_mic *mic = bridge->driver_private;
255
256 mutex_lock(&mic_mutex);
257 drm_display_mode_to_videomode(mode, &mic->vm);
258 mic->i80_mode = to_exynos_crtc(bridge->encoder->crtc)->i80_mode;
259 mutex_unlock(&mic_mutex);
260}
261
262static void mic_pre_enable(struct drm_bridge *bridge)
263{
264 struct exynos_mic *mic = bridge->driver_private;
265 int ret;
266
267 mutex_lock(&mic_mutex);
268 if (mic->enabled)
269 goto unlock;
270
271 ret = pm_runtime_get_sync(mic->dev);
272 if (ret < 0) {
273 pm_runtime_put_noidle(mic->dev);
274 goto unlock;
275 }
276
277 mic_set_path(mic, 1);
278
279 ret = mic_sw_reset(mic);
280 if (ret) {
281 DRM_DEV_ERROR(mic->dev, "Failed to reset\n");
282 goto turn_off;
283 }
284
285 if (!mic->i80_mode)
286 mic_set_porch_timing(mic);
287 mic_set_img_size(mic);
288 mic_set_output_timing(mic);
289 mic_set_reg_on(mic, 1);
290 mic->enabled = 1;
291 mutex_unlock(&mic_mutex);
292
293 return;
294
295turn_off:
296 pm_runtime_put(mic->dev);
297unlock:
298 mutex_unlock(&mic_mutex);
299}
300
301static void mic_enable(struct drm_bridge *bridge) { }
302
303static const struct drm_bridge_funcs mic_bridge_funcs = {
304 .disable = mic_disable,
305 .post_disable = mic_post_disable,
306 .mode_set = mic_mode_set,
307 .pre_enable = mic_pre_enable,
308 .enable = mic_enable,
309};
310
311static int exynos_mic_bind(struct device *dev, struct device *master,
312 void *data)
313{
314 struct exynos_mic *mic = dev_get_drvdata(dev);
315
316 mic->bridge.driver_private = mic;
317
318 return 0;
319}
320
321static void exynos_mic_unbind(struct device *dev, struct device *master,
322 void *data)
323{
324 struct exynos_mic *mic = dev_get_drvdata(dev);
325
326 mutex_lock(&mic_mutex);
327 if (!mic->enabled)
328 goto already_disabled;
329
330 pm_runtime_put(mic->dev);
331
332already_disabled:
333 mutex_unlock(&mic_mutex);
334}
335
336static const struct component_ops exynos_mic_component_ops = {
337 .bind = exynos_mic_bind,
338 .unbind = exynos_mic_unbind,
339};
340
341#ifdef CONFIG_PM
342static int exynos_mic_suspend(struct device *dev)
343{
344 struct exynos_mic *mic = dev_get_drvdata(dev);
345 int i;
346
347 for (i = NUM_CLKS - 1; i > -1; i--)
348 clk_disable_unprepare(mic->clks[i]);
349
350 return 0;
351}
352
353static int exynos_mic_resume(struct device *dev)
354{
355 struct exynos_mic *mic = dev_get_drvdata(dev);
356 int ret, i;
357
358 for (i = 0; i < NUM_CLKS; i++) {
359 ret = clk_prepare_enable(mic->clks[i]);
360 if (ret < 0) {
361 DRM_DEV_ERROR(dev, "Failed to enable clock (%s)\n",
362 clk_names[i]);
363 while (--i > -1)
364 clk_disable_unprepare(mic->clks[i]);
365 return ret;
366 }
367 }
368 return 0;
369}
370#endif
371
372static const struct dev_pm_ops exynos_mic_pm_ops = {
373 SET_RUNTIME_PM_OPS(exynos_mic_suspend, exynos_mic_resume, NULL)
374 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
375 pm_runtime_force_resume)
376};
377
378static int exynos_mic_probe(struct platform_device *pdev)
379{
380 struct device *dev = &pdev->dev;
381 struct exynos_mic *mic;
382 struct resource res;
383 int ret, i;
384
385 mic = devm_kzalloc(dev, sizeof(*mic), GFP_KERNEL);
386 if (!mic) {
387 DRM_DEV_ERROR(dev,
388 "mic: Failed to allocate memory for MIC object\n");
389 ret = -ENOMEM;
390 goto err;
391 }
392
393 mic->dev = dev;
394
395 ret = of_address_to_resource(dev->of_node, 0, &res);
396 if (ret) {
397 DRM_DEV_ERROR(dev, "mic: Failed to get mem region for MIC\n");
398 goto err;
399 }
400 mic->reg = devm_ioremap(dev, res.start, resource_size(&res));
401 if (!mic->reg) {
402 DRM_DEV_ERROR(dev, "mic: Failed to remap for MIC\n");
403 ret = -ENOMEM;
404 goto err;
405 }
406
407 mic->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
408 "samsung,disp-syscon");
409 if (IS_ERR(mic->sysreg)) {
410 DRM_DEV_ERROR(dev, "mic: Failed to get system register.\n");
411 ret = PTR_ERR(mic->sysreg);
412 goto err;
413 }
414
415 for (i = 0; i < NUM_CLKS; i++) {
416 mic->clks[i] = devm_clk_get(dev, clk_names[i]);
417 if (IS_ERR(mic->clks[i])) {
418 DRM_DEV_ERROR(dev, "mic: Failed to get clock (%s)\n",
419 clk_names[i]);
420 ret = PTR_ERR(mic->clks[i]);
421 goto err;
422 }
423 }
424
425 platform_set_drvdata(pdev, mic);
426
427 mic->bridge.funcs = &mic_bridge_funcs;
428 mic->bridge.of_node = dev->of_node;
429
430 drm_bridge_add(&mic->bridge);
431
432 pm_runtime_enable(dev);
433
434 ret = component_add(dev, &exynos_mic_component_ops);
435 if (ret)
436 goto err_pm;
437
438 DRM_DEV_DEBUG_KMS(dev, "MIC has been probed\n");
439
440 return 0;
441
442err_pm:
443 pm_runtime_disable(dev);
444err:
445 return ret;
446}
447
448static int exynos_mic_remove(struct platform_device *pdev)
449{
450 struct exynos_mic *mic = platform_get_drvdata(pdev);
451
452 component_del(&pdev->dev, &exynos_mic_component_ops);
453 pm_runtime_disable(&pdev->dev);
454
455 drm_bridge_remove(&mic->bridge);
456
457 return 0;
458}
459
460static const struct of_device_id exynos_mic_of_match[] = {
461 { .compatible = "samsung,exynos5433-mic" },
462 { }
463};
464MODULE_DEVICE_TABLE(of, exynos_mic_of_match);
465
466struct platform_driver mic_driver = {
467 .probe = exynos_mic_probe,
468 .remove = exynos_mic_remove,
469 .driver = {
470 .name = "exynos-mic",
471 .pm = &exynos_mic_pm_ops,
472 .owner = THIS_MODULE,
473 .of_match_table = exynos_mic_of_match,
474 },
475};