2 * Copyright (C) 2015 Samsung Electronics Co.Ltd
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundationr
11 #include <linux/platform_device.h>
12 #include <video/of_videomode.h>
13 #include <linux/of_address.h>
14 #include <video/videomode.h>
15 #include <linux/module.h>
16 #include <linux/delay.h>
17 #include <linux/mutex.h>
19 #include <linux/of_graph.h>
20 #include <linux/clk.h>
21 #include <linux/component.h>
22 #include <linux/pm_runtime.h>
24 #include <drm/drm_encoder.h>
25 #include <linux/mfd/syscon.h>
26 #include <linux/regmap.h>
28 #include "exynos_drm_drv.h"
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)
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
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)
68 #define MIC_V_PULSE_WIDTH(x) (((x) & 0x3fff) << 16)
69 #define MIC_V_PERIOD_LINE(x) ((x) & 0x3fff)
71 #define MIC_VBP_SIZE(x) (((x) & 0x3fff) << 16)
72 #define MIC_VFP_SIZE(x) ((x) & 0x3fff)
74 #define MIC_IMG_V_SIZE(x) (((x) & 0x3fff) << 16)
75 #define MIC_IMG_H_SIZE(x) ((x) & 0x3fff)
77 #define MIC_H_PULSE_WIDTH_IN(x) (((x) & 0x3fff) << 16)
78 #define MIC_H_PERIOD_PIXEL_IN(x) ((x) & 0x3fff)
80 #define MIC_HBP_SIZE_IN(x) (((x) & 0x3fff) << 16)
81 #define MIC_HFP_SIZE_IN(x) ((x) & 0x3fff)
83 #define MIC_H_PULSE_WIDTH_2D(x) (((x) & 0x3fff) << 16)
84 #define MIC_H_PERIOD_PIXEL_2D(x) ((x) & 0x3fff)
86 #define MIC_HBP_SIZE_2D(x) (((x) & 0x3fff) << 16)
87 #define MIC_HFP_SIZE_2D(x) ((x) & 0x3fff)
89 #define MIC_BS_SIZE_2D(x) ((x) & 0x3fff)
91 static char *clk_names[] = { "pclk_mic0", "sclk_rgb_vclk_to_mic0" };
92 #define NUM_CLKS ARRAY_SIZE(clk_names)
93 static DEFINE_MUTEX(mic_mutex);
98 struct regmap *sysreg;
99 struct clk *clks[NUM_CLKS];
103 struct drm_encoder *encoder;
104 struct drm_bridge bridge;
109 static void mic_set_path(struct exynos_mic *mic, bool enable)
114 ret = regmap_read(mic->sysreg, DSD_CFG_MUX, &val);
116 DRM_ERROR("mic: Failed to read system register\n");
128 val &= ~(MIC0_RGB_MUX | MIC0_I80_MUX | MIC0_ON_MUX);
130 ret = regmap_write(mic->sysreg, DSD_CFG_MUX, val);
132 DRM_ERROR("mic: Failed to read system register\n");
135 static int mic_sw_reset(struct exynos_mic *mic)
137 unsigned int retry = 100;
140 writel(MIC_SW_RST, mic->reg + MIC_OP);
142 while (retry-- > 0) {
143 ret = readl(mic->reg + MIC_OP);
144 if (!(ret & MIC_SW_RST))
153 static void mic_set_porch_timing(struct exynos_mic *mic)
155 struct videomode vm = mic->vm;
158 reg = MIC_V_PULSE_WIDTH(vm.vsync_len) +
159 MIC_V_PERIOD_LINE(vm.vsync_len + vm.vactive +
160 vm.vback_porch + vm.vfront_porch);
161 writel(reg, mic->reg + MIC_V_TIMING_0);
163 reg = MIC_VBP_SIZE(vm.vback_porch) +
164 MIC_VFP_SIZE(vm.vfront_porch);
165 writel(reg, mic->reg + MIC_V_TIMING_1);
167 reg = MIC_V_PULSE_WIDTH(vm.hsync_len) +
168 MIC_V_PERIOD_LINE(vm.hsync_len + vm.hactive +
169 vm.hback_porch + vm.hfront_porch);
170 writel(reg, mic->reg + MIC_INPUT_TIMING_0);
172 reg = MIC_VBP_SIZE(vm.hback_porch) +
173 MIC_VFP_SIZE(vm.hfront_porch);
174 writel(reg, mic->reg + MIC_INPUT_TIMING_1);
177 static void mic_set_img_size(struct exynos_mic *mic)
179 struct videomode *vm = &mic->vm;
182 reg = MIC_IMG_H_SIZE(vm->hactive) +
183 MIC_IMG_V_SIZE(vm->vactive);
185 writel(reg, mic->reg + MIC_IMG_SIZE);
188 static void mic_set_output_timing(struct exynos_mic *mic)
190 struct videomode vm = mic->vm;
193 DRM_DEBUG("w: %u, h: %u\n", vm.hactive, vm.vactive);
194 bs_size_2d = ((vm.hactive >> 2) << 1) + (vm.vactive % 4);
195 reg = MIC_BS_SIZE_2D(bs_size_2d);
196 writel(reg, mic->reg + MIC_2D_OUTPUT_TIMING_2);
198 if (!mic->i80_mode) {
199 reg = MIC_H_PULSE_WIDTH_2D(vm.hsync_len) +
200 MIC_H_PERIOD_PIXEL_2D(vm.hsync_len + bs_size_2d +
201 vm.hback_porch + vm.hfront_porch);
202 writel(reg, mic->reg + MIC_2D_OUTPUT_TIMING_0);
204 reg = MIC_HBP_SIZE_2D(vm.hback_porch) +
205 MIC_H_PERIOD_PIXEL_2D(vm.hfront_porch);
206 writel(reg, mic->reg + MIC_2D_OUTPUT_TIMING_1);
210 static void mic_set_reg_on(struct exynos_mic *mic, bool enable)
212 u32 reg = readl(mic->reg + MIC_OP);
215 reg &= ~(MIC_MODE_SEL_MASK | MIC_CORE_VER_CONTROL | MIC_PSR_EN);
216 reg |= (MIC_CORE_EN | MIC_BS_CHG_OUT | MIC_ON_REG);
218 reg &= ~MIC_MODE_SEL_COMMAND_MODE;
220 reg |= MIC_MODE_SEL_COMMAND_MODE;
226 writel(reg, mic->reg + MIC_OP);
229 static void mic_disable(struct drm_bridge *bridge) { }
231 static void mic_post_disable(struct drm_bridge *bridge)
233 struct exynos_mic *mic = bridge->driver_private;
235 mutex_lock(&mic_mutex);
237 goto already_disabled;
239 mic_set_path(mic, 0);
241 pm_runtime_put(mic->dev);
245 mutex_unlock(&mic_mutex);
248 static void mic_mode_set(struct drm_bridge *bridge,
249 struct drm_display_mode *mode,
250 struct drm_display_mode *adjusted_mode)
252 struct exynos_mic *mic = bridge->driver_private;
254 mutex_lock(&mic_mutex);
255 drm_display_mode_to_videomode(mode, &mic->vm);
256 mic->i80_mode = to_exynos_crtc(bridge->encoder->crtc)->i80_mode;
257 mutex_unlock(&mic_mutex);
260 static void mic_pre_enable(struct drm_bridge *bridge)
262 struct exynos_mic *mic = bridge->driver_private;
265 mutex_lock(&mic_mutex);
269 ret = pm_runtime_get_sync(mic->dev);
273 mic_set_path(mic, 1);
275 ret = mic_sw_reset(mic);
277 DRM_ERROR("Failed to reset\n");
282 mic_set_porch_timing(mic);
283 mic_set_img_size(mic);
284 mic_set_output_timing(mic);
285 mic_set_reg_on(mic, 1);
287 mutex_unlock(&mic_mutex);
292 pm_runtime_put(mic->dev);
294 mutex_unlock(&mic_mutex);
297 static void mic_enable(struct drm_bridge *bridge) { }
299 static const struct drm_bridge_funcs mic_bridge_funcs = {
300 .disable = mic_disable,
301 .post_disable = mic_post_disable,
302 .mode_set = mic_mode_set,
303 .pre_enable = mic_pre_enable,
304 .enable = mic_enable,
307 static int exynos_mic_bind(struct device *dev, struct device *master,
310 struct exynos_mic *mic = dev_get_drvdata(dev);
312 mic->bridge.driver_private = mic;
317 static void exynos_mic_unbind(struct device *dev, struct device *master,
320 struct exynos_mic *mic = dev_get_drvdata(dev);
322 mutex_lock(&mic_mutex);
324 goto already_disabled;
326 pm_runtime_put(mic->dev);
329 mutex_unlock(&mic_mutex);
332 static const struct component_ops exynos_mic_component_ops = {
333 .bind = exynos_mic_bind,
334 .unbind = exynos_mic_unbind,
338 static int exynos_mic_suspend(struct device *dev)
340 struct exynos_mic *mic = dev_get_drvdata(dev);
343 for (i = NUM_CLKS - 1; i > -1; i--)
344 clk_disable_unprepare(mic->clks[i]);
349 static int exynos_mic_resume(struct device *dev)
351 struct exynos_mic *mic = dev_get_drvdata(dev);
354 for (i = 0; i < NUM_CLKS; i++) {
355 ret = clk_prepare_enable(mic->clks[i]);
357 DRM_ERROR("Failed to enable clock (%s)\n",
360 clk_disable_unprepare(mic->clks[i]);
368 static const struct dev_pm_ops exynos_mic_pm_ops = {
369 SET_RUNTIME_PM_OPS(exynos_mic_suspend, exynos_mic_resume, NULL)
372 static int exynos_mic_probe(struct platform_device *pdev)
374 struct device *dev = &pdev->dev;
375 struct exynos_mic *mic;
379 mic = devm_kzalloc(dev, sizeof(*mic), GFP_KERNEL);
381 DRM_ERROR("mic: Failed to allocate memory for MIC object\n");
388 ret = of_address_to_resource(dev->of_node, 0, &res);
390 DRM_ERROR("mic: Failed to get mem region for MIC\n");
393 mic->reg = devm_ioremap(dev, res.start, resource_size(&res));
395 DRM_ERROR("mic: Failed to remap for MIC\n");
400 mic->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
401 "samsung,disp-syscon");
402 if (IS_ERR(mic->sysreg)) {
403 DRM_ERROR("mic: Failed to get system register.\n");
404 ret = PTR_ERR(mic->sysreg);
408 for (i = 0; i < NUM_CLKS; i++) {
409 mic->clks[i] = devm_clk_get(dev, clk_names[i]);
410 if (IS_ERR(mic->clks[i])) {
411 DRM_ERROR("mic: Failed to get clock (%s)\n",
413 ret = PTR_ERR(mic->clks[i]);
418 platform_set_drvdata(pdev, mic);
420 mic->bridge.funcs = &mic_bridge_funcs;
421 mic->bridge.of_node = dev->of_node;
423 drm_bridge_add(&mic->bridge);
425 pm_runtime_enable(dev);
427 ret = component_add(dev, &exynos_mic_component_ops);
431 DRM_DEBUG_KMS("MIC has been probed\n");
436 pm_runtime_disable(dev);
441 static int exynos_mic_remove(struct platform_device *pdev)
443 struct exynos_mic *mic = platform_get_drvdata(pdev);
445 component_del(&pdev->dev, &exynos_mic_component_ops);
446 pm_runtime_disable(&pdev->dev);
448 drm_bridge_remove(&mic->bridge);
453 static const struct of_device_id exynos_mic_of_match[] = {
454 { .compatible = "samsung,exynos5433-mic" },
457 MODULE_DEVICE_TABLE(of, exynos_mic_of_match);
459 struct platform_driver mic_driver = {
460 .probe = exynos_mic_probe,
461 .remove = exynos_mic_remove,
463 .name = "exynos-mic",
464 .pm = &exynos_mic_pm_ops,
465 .owner = THIS_MODULE,
466 .of_match_table = exynos_mic_of_match,