Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
[pandora-kernel.git] / drivers / video / sh_mobile_hdmi.c
1 /*
2  * SH-Mobile High-Definition Multimedia Interface (HDMI) driver
3  * for SLISHDMI13T and SLIPHDMIT IP cores
4  *
5  * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  */
11
12 #include <linux/clk.h>
13 #include <linux/console.h>
14 #include <linux/delay.h>
15 #include <linux/err.h>
16 #include <linux/init.h>
17 #include <linux/interrupt.h>
18 #include <linux/io.h>
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/slab.h>
23 #include <linux/types.h>
24 #include <linux/workqueue.h>
25 #include <sound/soc.h>
26 #include <sound/soc-dapm.h>
27 #include <sound/initval.h>
28
29 #include <video/sh_mobile_hdmi.h>
30 #include <video/sh_mobile_lcdc.h>
31
32 #include "sh_mobile_lcdcfb.h"
33
34 #define HDMI_SYSTEM_CTRL                        0x00 /* System control */
35 #define HDMI_L_R_DATA_SWAP_CTRL_RPKT            0x01 /* L/R data swap control,
36                                                         bits 19..16 of 20-bit N for Audio Clock Regeneration packet */
37 #define HDMI_20_BIT_N_FOR_AUDIO_RPKT_15_8       0x02 /* bits 15..8 of 20-bit N for Audio Clock Regeneration packet */
38 #define HDMI_20_BIT_N_FOR_AUDIO_RPKT_7_0        0x03 /* bits 7..0 of 20-bit N for Audio Clock Regeneration packet */
39 #define HDMI_SPDIF_AUDIO_SAMP_FREQ_CTS          0x04 /* SPDIF audio sampling frequency,
40                                                         bits 19..16 of Internal CTS */
41 #define HDMI_INTERNAL_CTS_15_8                  0x05 /* bits 15..8 of Internal CTS */
42 #define HDMI_INTERNAL_CTS_7_0                   0x06 /* bits 7..0 of Internal CTS */
43 #define HDMI_EXTERNAL_CTS_19_16                 0x07 /* External CTS */
44 #define HDMI_EXTERNAL_CTS_15_8                  0x08 /* External CTS */
45 #define HDMI_EXTERNAL_CTS_7_0                   0x09 /* External CTS */
46 #define HDMI_AUDIO_SETTING_1                    0x0A /* Audio setting.1 */
47 #define HDMI_AUDIO_SETTING_2                    0x0B /* Audio setting.2 */
48 #define HDMI_I2S_AUDIO_SET                      0x0C /* I2S audio setting */
49 #define HDMI_DSD_AUDIO_SET                      0x0D /* DSD audio setting */
50 #define HDMI_DEBUG_MONITOR_1                    0x0E /* Debug monitor.1 */
51 #define HDMI_DEBUG_MONITOR_2                    0x0F /* Debug monitor.2 */
52 #define HDMI_I2S_INPUT_PIN_SWAP                 0x10 /* I2S input pin swap */
53 #define HDMI_AUDIO_STATUS_BITS_SETTING_1        0x11 /* Audio status bits setting.1 */
54 #define HDMI_AUDIO_STATUS_BITS_SETTING_2        0x12 /* Audio status bits setting.2 */
55 #define HDMI_CATEGORY_CODE                      0x13 /* Category code */
56 #define HDMI_SOURCE_NUM_AUDIO_WORD_LEN          0x14 /* Source number/Audio word length */
57 #define HDMI_AUDIO_VIDEO_SETTING_1              0x15 /* Audio/Video setting.1 */
58 #define HDMI_VIDEO_SETTING_1                    0x16 /* Video setting.1 */
59 #define HDMI_DEEP_COLOR_MODES                   0x17 /* Deep Color Modes */
60
61 /* 12 16- and 10-bit Color space conversion parameters: 0x18..0x2f */
62 #define HDMI_COLOR_SPACE_CONVERSION_PARAMETERS  0x18
63
64 #define HDMI_EXTERNAL_VIDEO_PARAM_SETTINGS      0x30 /* External video parameter settings */
65 #define HDMI_EXTERNAL_H_TOTAL_7_0               0x31 /* External horizontal total (LSB) */
66 #define HDMI_EXTERNAL_H_TOTAL_11_8              0x32 /* External horizontal total (MSB) */
67 #define HDMI_EXTERNAL_H_BLANK_7_0               0x33 /* External horizontal blank (LSB) */
68 #define HDMI_EXTERNAL_H_BLANK_9_8               0x34 /* External horizontal blank (MSB) */
69 #define HDMI_EXTERNAL_H_DELAY_7_0               0x35 /* External horizontal delay (LSB) */
70 #define HDMI_EXTERNAL_H_DELAY_9_8               0x36 /* External horizontal delay (MSB) */
71 #define HDMI_EXTERNAL_H_DURATION_7_0            0x37 /* External horizontal duration (LSB) */
72 #define HDMI_EXTERNAL_H_DURATION_9_8            0x38 /* External horizontal duration (MSB) */
73 #define HDMI_EXTERNAL_V_TOTAL_7_0               0x39 /* External vertical total (LSB) */
74 #define HDMI_EXTERNAL_V_TOTAL_9_8               0x3A /* External vertical total (MSB) */
75 #define HDMI_AUDIO_VIDEO_SETTING_2              0x3B /* Audio/Video setting.2 */
76 #define HDMI_EXTERNAL_V_BLANK                   0x3D /* External vertical blank */
77 #define HDMI_EXTERNAL_V_DELAY                   0x3E /* External vertical delay */
78 #define HDMI_EXTERNAL_V_DURATION                0x3F /* External vertical duration */
79 #define HDMI_CTRL_PKT_MANUAL_SEND_CONTROL       0x40 /* Control packet manual send control */
80 #define HDMI_CTRL_PKT_AUTO_SEND                 0x41 /* Control packet auto send with VSYNC control */
81 #define HDMI_AUTO_CHECKSUM_OPTION               0x42 /* Auto checksum option */
82 #define HDMI_VIDEO_SETTING_2                    0x45 /* Video setting.2 */
83 #define HDMI_OUTPUT_OPTION                      0x46 /* Output option */
84 #define HDMI_SLIPHDMIT_PARAM_OPTION             0x51 /* SLIPHDMIT parameter option */
85 #define HDMI_HSYNC_PMENT_AT_EMB_7_0             0x52 /* HSYNC placement at embedded sync (LSB) */
86 #define HDMI_HSYNC_PMENT_AT_EMB_15_8            0x53 /* HSYNC placement at embedded sync (MSB) */
87 #define HDMI_VSYNC_PMENT_AT_EMB_7_0             0x54 /* VSYNC placement at embedded sync (LSB) */
88 #define HDMI_VSYNC_PMENT_AT_EMB_14_8            0x55 /* VSYNC placement at embedded sync (MSB) */
89 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_1         0x56 /* SLIPHDMIT parameter settings.1 */
90 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_2         0x57 /* SLIPHDMIT parameter settings.2 */
91 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_3         0x58 /* SLIPHDMIT parameter settings.3 */
92 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_5         0x59 /* SLIPHDMIT parameter settings.5 */
93 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_6         0x5A /* SLIPHDMIT parameter settings.6 */
94 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_7         0x5B /* SLIPHDMIT parameter settings.7 */
95 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_8         0x5C /* SLIPHDMIT parameter settings.8 */
96 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_9         0x5D /* SLIPHDMIT parameter settings.9 */
97 #define HDMI_SLIPHDMIT_PARAM_SETTINGS_10        0x5E /* SLIPHDMIT parameter settings.10 */
98 #define HDMI_CTRL_PKT_BUF_INDEX                 0x5F /* Control packet buffer index */
99 #define HDMI_CTRL_PKT_BUF_ACCESS_HB0            0x60 /* Control packet data buffer access window - HB0 */
100 #define HDMI_CTRL_PKT_BUF_ACCESS_HB1            0x61 /* Control packet data buffer access window - HB1 */
101 #define HDMI_CTRL_PKT_BUF_ACCESS_HB2            0x62 /* Control packet data buffer access window - HB2 */
102 #define HDMI_CTRL_PKT_BUF_ACCESS_PB0            0x63 /* Control packet data buffer access window - PB0 */
103 #define HDMI_CTRL_PKT_BUF_ACCESS_PB1            0x64 /* Control packet data buffer access window - PB1 */
104 #define HDMI_CTRL_PKT_BUF_ACCESS_PB2            0x65 /* Control packet data buffer access window - PB2 */
105 #define HDMI_CTRL_PKT_BUF_ACCESS_PB3            0x66 /* Control packet data buffer access window - PB3 */
106 #define HDMI_CTRL_PKT_BUF_ACCESS_PB4            0x67 /* Control packet data buffer access window - PB4 */
107 #define HDMI_CTRL_PKT_BUF_ACCESS_PB5            0x68 /* Control packet data buffer access window - PB5 */
108 #define HDMI_CTRL_PKT_BUF_ACCESS_PB6            0x69 /* Control packet data buffer access window - PB6 */
109 #define HDMI_CTRL_PKT_BUF_ACCESS_PB7            0x6A /* Control packet data buffer access window - PB7 */
110 #define HDMI_CTRL_PKT_BUF_ACCESS_PB8            0x6B /* Control packet data buffer access window - PB8 */
111 #define HDMI_CTRL_PKT_BUF_ACCESS_PB9            0x6C /* Control packet data buffer access window - PB9 */
112 #define HDMI_CTRL_PKT_BUF_ACCESS_PB10           0x6D /* Control packet data buffer access window - PB10 */
113 #define HDMI_CTRL_PKT_BUF_ACCESS_PB11           0x6E /* Control packet data buffer access window - PB11 */
114 #define HDMI_CTRL_PKT_BUF_ACCESS_PB12           0x6F /* Control packet data buffer access window - PB12 */
115 #define HDMI_CTRL_PKT_BUF_ACCESS_PB13           0x70 /* Control packet data buffer access window - PB13 */
116 #define HDMI_CTRL_PKT_BUF_ACCESS_PB14           0x71 /* Control packet data buffer access window - PB14 */
117 #define HDMI_CTRL_PKT_BUF_ACCESS_PB15           0x72 /* Control packet data buffer access window - PB15 */
118 #define HDMI_CTRL_PKT_BUF_ACCESS_PB16           0x73 /* Control packet data buffer access window - PB16 */
119 #define HDMI_CTRL_PKT_BUF_ACCESS_PB17           0x74 /* Control packet data buffer access window - PB17 */
120 #define HDMI_CTRL_PKT_BUF_ACCESS_PB18           0x75 /* Control packet data buffer access window - PB18 */
121 #define HDMI_CTRL_PKT_BUF_ACCESS_PB19           0x76 /* Control packet data buffer access window - PB19 */
122 #define HDMI_CTRL_PKT_BUF_ACCESS_PB20           0x77 /* Control packet data buffer access window - PB20 */
123 #define HDMI_CTRL_PKT_BUF_ACCESS_PB21           0x78 /* Control packet data buffer access window - PB21 */
124 #define HDMI_CTRL_PKT_BUF_ACCESS_PB22           0x79 /* Control packet data buffer access window - PB22 */
125 #define HDMI_CTRL_PKT_BUF_ACCESS_PB23           0x7A /* Control packet data buffer access window - PB23 */
126 #define HDMI_CTRL_PKT_BUF_ACCESS_PB24           0x7B /* Control packet data buffer access window - PB24 */
127 #define HDMI_CTRL_PKT_BUF_ACCESS_PB25           0x7C /* Control packet data buffer access window - PB25 */
128 #define HDMI_CTRL_PKT_BUF_ACCESS_PB26           0x7D /* Control packet data buffer access window - PB26 */
129 #define HDMI_CTRL_PKT_BUF_ACCESS_PB27           0x7E /* Control packet data buffer access window - PB27 */
130 #define HDMI_EDID_KSV_FIFO_ACCESS_WINDOW        0x80 /* EDID/KSV FIFO access window */
131 #define HDMI_DDC_BUS_ACCESS_FREQ_CTRL_7_0       0x81 /* DDC bus access frequency control (LSB) */
132 #define HDMI_DDC_BUS_ACCESS_FREQ_CTRL_15_8      0x82 /* DDC bus access frequency control (MSB) */
133 #define HDMI_INTERRUPT_MASK_1                   0x92 /* Interrupt mask.1 */
134 #define HDMI_INTERRUPT_MASK_2                   0x93 /* Interrupt mask.2 */
135 #define HDMI_INTERRUPT_STATUS_1                 0x94 /* Interrupt status.1 */
136 #define HDMI_INTERRUPT_STATUS_2                 0x95 /* Interrupt status.2 */
137 #define HDMI_INTERRUPT_MASK_3                   0x96 /* Interrupt mask.3 */
138 #define HDMI_INTERRUPT_MASK_4                   0x97 /* Interrupt mask.4 */
139 #define HDMI_INTERRUPT_STATUS_3                 0x98 /* Interrupt status.3 */
140 #define HDMI_INTERRUPT_STATUS_4                 0x99 /* Interrupt status.4 */
141 #define HDMI_SOFTWARE_HDCP_CONTROL_1            0x9A /* Software HDCP control.1 */
142 #define HDMI_FRAME_COUNTER                      0x9C /* Frame counter */
143 #define HDMI_FRAME_COUNTER_FOR_RI_CHECK         0x9D /* Frame counter for Ri check */
144 #define HDMI_HDCP_CONTROL                       0xAF /* HDCP control */
145 #define HDMI_RI_FRAME_COUNT_REGISTER            0xB2 /* Ri frame count register */
146 #define HDMI_DDC_BUS_CONTROL                    0xB7 /* DDC bus control */
147 #define HDMI_HDCP_STATUS                        0xB8 /* HDCP status */
148 #define HDMI_SHA0                               0xB9 /* sha0 */
149 #define HDMI_SHA1                               0xBA /* sha1 */
150 #define HDMI_SHA2                               0xBB /* sha2 */
151 #define HDMI_SHA3                               0xBC /* sha3 */
152 #define HDMI_SHA4                               0xBD /* sha4 */
153 #define HDMI_BCAPS_READ                         0xBE /* BCAPS read / debug */
154 #define HDMI_AKSV_BKSV_7_0_MONITOR              0xBF /* AKSV/BKSV[7:0] monitor */
155 #define HDMI_AKSV_BKSV_15_8_MONITOR             0xC0 /* AKSV/BKSV[15:8] monitor */
156 #define HDMI_AKSV_BKSV_23_16_MONITOR            0xC1 /* AKSV/BKSV[23:16] monitor */
157 #define HDMI_AKSV_BKSV_31_24_MONITOR            0xC2 /* AKSV/BKSV[31:24] monitor */
158 #define HDMI_AKSV_BKSV_39_32_MONITOR            0xC3 /* AKSV/BKSV[39:32] monitor */
159 #define HDMI_EDID_SEGMENT_POINTER               0xC4 /* EDID segment pointer */
160 #define HDMI_EDID_WORD_ADDRESS                  0xC5 /* EDID word address */
161 #define HDMI_EDID_DATA_FIFO_ADDRESS             0xC6 /* EDID data FIFO address */
162 #define HDMI_NUM_OF_HDMI_DEVICES                0xC7 /* Number of HDMI devices */
163 #define HDMI_HDCP_ERROR_CODE                    0xC8 /* HDCP error code */
164 #define HDMI_100MS_TIMER_SET                    0xC9 /* 100ms timer setting */
165 #define HDMI_5SEC_TIMER_SET                     0xCA /* 5sec timer setting */
166 #define HDMI_RI_READ_COUNT                      0xCB /* Ri read count */
167 #define HDMI_AN_SEED                            0xCC /* An seed */
168 #define HDMI_MAX_NUM_OF_RCIVRS_ALLOWED          0xCD /* Maximum number of receivers allowed */
169 #define HDMI_HDCP_MEMORY_ACCESS_CONTROL_1       0xCE /* HDCP memory access control.1 */
170 #define HDMI_HDCP_MEMORY_ACCESS_CONTROL_2       0xCF /* HDCP memory access control.2 */
171 #define HDMI_HDCP_CONTROL_2                     0xD0 /* HDCP Control 2 */
172 #define HDMI_HDCP_KEY_MEMORY_CONTROL            0xD2 /* HDCP Key Memory Control */
173 #define HDMI_COLOR_SPACE_CONV_CONFIG_1          0xD3 /* Color space conversion configuration.1 */
174 #define HDMI_VIDEO_SETTING_3                    0xD4 /* Video setting.3 */
175 #define HDMI_RI_7_0                             0xD5 /* Ri[7:0] */
176 #define HDMI_RI_15_8                            0xD6 /* Ri[15:8] */
177 #define HDMI_PJ                                 0xD7 /* Pj */
178 #define HDMI_SHA_RD                             0xD8 /* sha_rd */
179 #define HDMI_RI_7_0_SAVED                       0xD9 /* Ri[7:0] saved */
180 #define HDMI_RI_15_8_SAVED                      0xDA /* Ri[15:8] saved */
181 #define HDMI_PJ_SAVED                           0xDB /* Pj saved */
182 #define HDMI_NUM_OF_DEVICES                     0xDC /* Number of devices */
183 #define HDMI_HOT_PLUG_MSENS_STATUS              0xDF /* Hot plug/MSENS status */
184 #define HDMI_BCAPS_WRITE                        0xE0 /* bcaps */
185 #define HDMI_BSTAT_7_0                          0xE1 /* bstat[7:0] */
186 #define HDMI_BSTAT_15_8                         0xE2 /* bstat[15:8] */
187 #define HDMI_BKSV_7_0                           0xE3 /* bksv[7:0] */
188 #define HDMI_BKSV_15_8                          0xE4 /* bksv[15:8] */
189 #define HDMI_BKSV_23_16                         0xE5 /* bksv[23:16] */
190 #define HDMI_BKSV_31_24                         0xE6 /* bksv[31:24] */
191 #define HDMI_BKSV_39_32                         0xE7 /* bksv[39:32] */
192 #define HDMI_AN_7_0                             0xE8 /* An[7:0] */
193 #define HDMI_AN_15_8                            0xE9 /* An [15:8] */
194 #define HDMI_AN_23_16                           0xEA /* An [23:16] */
195 #define HDMI_AN_31_24                           0xEB /* An [31:24] */
196 #define HDMI_AN_39_32                           0xEC /* An [39:32] */
197 #define HDMI_AN_47_40                           0xED /* An [47:40] */
198 #define HDMI_AN_55_48                           0xEE /* An [55:48] */
199 #define HDMI_AN_63_56                           0xEF /* An [63:56] */
200 #define HDMI_PRODUCT_ID                         0xF0 /* Product ID */
201 #define HDMI_REVISION_ID                        0xF1 /* Revision ID */
202 #define HDMI_TEST_MODE                          0xFE /* Test mode */
203
204 enum hotplug_state {
205         HDMI_HOTPLUG_DISCONNECTED,
206         HDMI_HOTPLUG_CONNECTED,
207         HDMI_HOTPLUG_EDID_DONE,
208 };
209
210 struct sh_hdmi {
211         void __iomem *base;
212         enum hotplug_state hp_state;    /* hot-plug status */
213         u8 preprogrammed_vic;           /* use a pre-programmed VIC or
214                                            the external mode */
215         u8 edid_block_addr;
216         u8 edid_segment_nr;
217         u8 edid_blocks;
218         struct clk *hdmi_clk;
219         struct device *dev;
220         struct fb_info *info;
221         struct mutex mutex;             /* Protect the info pointer */
222         struct delayed_work edid_work;
223         struct fb_var_screeninfo var;
224         struct fb_monspecs monspec;
225 };
226
227 static void hdmi_write(struct sh_hdmi *hdmi, u8 data, u8 reg)
228 {
229         iowrite8(data, hdmi->base + reg);
230 }
231
232 static u8 hdmi_read(struct sh_hdmi *hdmi, u8 reg)
233 {
234         return ioread8(hdmi->base + reg);
235 }
236
237 /*
238  *      HDMI sound
239  */
240 static unsigned int sh_hdmi_snd_read(struct snd_soc_codec *codec,
241                                      unsigned int reg)
242 {
243         struct sh_hdmi *hdmi = snd_soc_codec_get_drvdata(codec);
244
245         return hdmi_read(hdmi, reg);
246 }
247
248 static int sh_hdmi_snd_write(struct snd_soc_codec *codec,
249                              unsigned int reg,
250                              unsigned int value)
251 {
252         struct sh_hdmi *hdmi = snd_soc_codec_get_drvdata(codec);
253
254         hdmi_write(hdmi, value, reg);
255         return 0;
256 }
257
258 static struct snd_soc_dai_driver sh_hdmi_dai = {
259         .name = "sh_mobile_hdmi-hifi",
260         .playback = {
261                 .stream_name = "Playback",
262                 .channels_min = 2,
263                 .channels_max = 8,
264                 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100  |
265                          SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200  |
266                          SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
267                          SNDRV_PCM_RATE_192000,
268                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
269         },
270 };
271
272 static int sh_hdmi_snd_probe(struct snd_soc_codec *codec)
273 {
274         dev_info(codec->dev, "SH Mobile HDMI Audio Codec");
275
276         return 0;
277 }
278
279 static struct snd_soc_codec_driver soc_codec_dev_sh_hdmi = {
280         .probe          = sh_hdmi_snd_probe,
281         .read           = sh_hdmi_snd_read,
282         .write          = sh_hdmi_snd_write,
283 };
284
285 /*
286  *      HDMI video
287  */
288
289 /* External video parameter settings */
290 static void sh_hdmi_external_video_param(struct sh_hdmi *hdmi)
291 {
292         struct fb_var_screeninfo *var = &hdmi->var;
293         u16 htotal, hblank, hdelay, vtotal, vblank, vdelay, voffset;
294         u8 sync = 0;
295
296         htotal = var->xres + var->right_margin + var->left_margin + var->hsync_len;
297
298         hdelay = var->hsync_len + var->left_margin;
299         hblank = var->right_margin + hdelay;
300
301         /*
302          * Vertical timing looks a bit different in Figure 18,
303          * but let's try the same first by setting offset = 0
304          */
305         vtotal = var->yres + var->upper_margin + var->lower_margin + var->vsync_len;
306
307         vdelay = var->vsync_len + var->upper_margin;
308         vblank = var->lower_margin + vdelay;
309         voffset = min(var->upper_margin / 2, 6U);
310
311         /*
312          * [3]: VSYNC polarity: Positive
313          * [2]: HSYNC polarity: Positive
314          * [1]: Interlace/Progressive: Progressive
315          * [0]: External video settings enable: used.
316          */
317         if (var->sync & FB_SYNC_HOR_HIGH_ACT)
318                 sync |= 4;
319         if (var->sync & FB_SYNC_VERT_HIGH_ACT)
320                 sync |= 8;
321
322         dev_dbg(hdmi->dev, "H: %u, %u, %u, %u; V: %u, %u, %u, %u; sync 0x%x\n",
323                 htotal, hblank, hdelay, var->hsync_len,
324                 vtotal, vblank, vdelay, var->vsync_len, sync);
325
326         hdmi_write(hdmi, sync | (voffset << 4), HDMI_EXTERNAL_VIDEO_PARAM_SETTINGS);
327
328         hdmi_write(hdmi, htotal, HDMI_EXTERNAL_H_TOTAL_7_0);
329         hdmi_write(hdmi, htotal >> 8, HDMI_EXTERNAL_H_TOTAL_11_8);
330
331         hdmi_write(hdmi, hblank, HDMI_EXTERNAL_H_BLANK_7_0);
332         hdmi_write(hdmi, hblank >> 8, HDMI_EXTERNAL_H_BLANK_9_8);
333
334         hdmi_write(hdmi, hdelay, HDMI_EXTERNAL_H_DELAY_7_0);
335         hdmi_write(hdmi, hdelay >> 8, HDMI_EXTERNAL_H_DELAY_9_8);
336
337         hdmi_write(hdmi, var->hsync_len, HDMI_EXTERNAL_H_DURATION_7_0);
338         hdmi_write(hdmi, var->hsync_len >> 8, HDMI_EXTERNAL_H_DURATION_9_8);
339
340         hdmi_write(hdmi, vtotal, HDMI_EXTERNAL_V_TOTAL_7_0);
341         hdmi_write(hdmi, vtotal >> 8, HDMI_EXTERNAL_V_TOTAL_9_8);
342
343         hdmi_write(hdmi, vblank, HDMI_EXTERNAL_V_BLANK);
344
345         hdmi_write(hdmi, vdelay, HDMI_EXTERNAL_V_DELAY);
346
347         hdmi_write(hdmi, var->vsync_len, HDMI_EXTERNAL_V_DURATION);
348
349         /* Set bit 0 of HDMI_EXTERNAL_VIDEO_PARAM_SETTINGS here for external mode */
350         if (!hdmi->preprogrammed_vic)
351                 hdmi_write(hdmi, sync | 1 | (voffset << 4),
352                            HDMI_EXTERNAL_VIDEO_PARAM_SETTINGS);
353 }
354
355 /**
356  * sh_hdmi_video_config()
357  */
358 static void sh_hdmi_video_config(struct sh_hdmi *hdmi)
359 {
360         /*
361          * [7:4]: Audio sampling frequency: 48kHz
362          * [3:1]: Input video format: RGB and YCbCr 4:4:4 (Y on Green)
363          * [0]: Internal/External DE select: internal
364          */
365         hdmi_write(hdmi, 0x20, HDMI_AUDIO_VIDEO_SETTING_1);
366
367         /*
368          * [7:6]: Video output format: RGB 4:4:4
369          * [5:4]: Input video data width: 8 bit
370          * [3:1]: EAV/SAV location: channel 1
371          * [0]: Video input color space: RGB
372          */
373         hdmi_write(hdmi, 0x34, HDMI_VIDEO_SETTING_1);
374
375         /*
376          * [7:6]: Together with bit [6] of HDMI_AUDIO_VIDEO_SETTING_2, which is
377          * left at 0 by default, this configures 24bpp and sets the Color Depth
378          * (CD) field in the General Control Packet
379          */
380         hdmi_write(hdmi, 0x20, HDMI_DEEP_COLOR_MODES);
381 }
382
383 /**
384  * sh_hdmi_audio_config()
385  */
386 static void sh_hdmi_audio_config(struct sh_hdmi *hdmi)
387 {
388         u8 data;
389         struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
390
391         /*
392          * [7:4] L/R data swap control
393          * [3:0] appropriate N[19:16]
394          */
395         hdmi_write(hdmi, 0x00, HDMI_L_R_DATA_SWAP_CTRL_RPKT);
396         /* appropriate N[15:8] */
397         hdmi_write(hdmi, 0x18, HDMI_20_BIT_N_FOR_AUDIO_RPKT_15_8);
398         /* appropriate N[7:0] */
399         hdmi_write(hdmi, 0x00, HDMI_20_BIT_N_FOR_AUDIO_RPKT_7_0);
400
401         /* [7:4] 48 kHz SPDIF not used */
402         hdmi_write(hdmi, 0x20, HDMI_SPDIF_AUDIO_SAMP_FREQ_CTS);
403
404         /*
405          * [6:5] set required down sampling rate if required
406          * [4:3] set required audio source
407          */
408         switch (pdata->flags & HDMI_SND_SRC_MASK) {
409         default:
410                 /* fall through */
411         case HDMI_SND_SRC_I2S:
412                 data = 0x0 << 3;
413                 break;
414         case HDMI_SND_SRC_SPDIF:
415                 data = 0x1 << 3;
416                 break;
417         case HDMI_SND_SRC_DSD:
418                 data = 0x2 << 3;
419                 break;
420         case HDMI_SND_SRC_HBR:
421                 data = 0x3 << 3;
422                 break;
423         }
424         hdmi_write(hdmi, data, HDMI_AUDIO_SETTING_1);
425
426         /* [3:0] set sending channel number for channel status */
427         hdmi_write(hdmi, 0x40, HDMI_AUDIO_SETTING_2);
428
429         /*
430          * [5:2] set valid I2S source input pin
431          * [1:0] set input I2S source mode
432          */
433         hdmi_write(hdmi, 0x04, HDMI_I2S_AUDIO_SET);
434
435         /* [7:4] set valid DSD source input pin */
436         hdmi_write(hdmi, 0x00, HDMI_DSD_AUDIO_SET);
437
438         /* [7:0] set appropriate I2S input pin swap settings if required */
439         hdmi_write(hdmi, 0x00, HDMI_I2S_INPUT_PIN_SWAP);
440
441         /*
442          * [7] set validity bit for channel status
443          * [3:0] set original sample frequency for channel status
444          */
445         hdmi_write(hdmi, 0x00, HDMI_AUDIO_STATUS_BITS_SETTING_1);
446
447         /*
448          * [7] set value for channel status
449          * [6] set value for channel status
450          * [5] set copyright bit for channel status
451          * [4:2] set additional information for channel status
452          * [1:0] set clock accuracy for channel status
453          */
454         hdmi_write(hdmi, 0x00, HDMI_AUDIO_STATUS_BITS_SETTING_2);
455
456         /* [7:0] set category code for channel status */
457         hdmi_write(hdmi, 0x00, HDMI_CATEGORY_CODE);
458
459         /*
460          * [7:4] set source number for channel status
461          * [3:0] set word length for channel status
462          */
463         hdmi_write(hdmi, 0x00, HDMI_SOURCE_NUM_AUDIO_WORD_LEN);
464
465         /* [7:4] set sample frequency for channel status */
466         hdmi_write(hdmi, 0x20, HDMI_AUDIO_VIDEO_SETTING_1);
467 }
468
469 /**
470  * sh_hdmi_phy_config() - configure the HDMI PHY for the used video mode
471  */
472 static void sh_hdmi_phy_config(struct sh_hdmi *hdmi)
473 {
474         if (hdmi->var.pixclock < 10000) {
475                 /* for 1080p8bit 148MHz */
476                 hdmi_write(hdmi, 0x1d, HDMI_SLIPHDMIT_PARAM_SETTINGS_1);
477                 hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_2);
478                 hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_3);
479                 hdmi_write(hdmi, 0x4c, HDMI_SLIPHDMIT_PARAM_SETTINGS_5);
480                 hdmi_write(hdmi, 0x1e, HDMI_SLIPHDMIT_PARAM_SETTINGS_6);
481                 hdmi_write(hdmi, 0x48, HDMI_SLIPHDMIT_PARAM_SETTINGS_7);
482                 hdmi_write(hdmi, 0x0e, HDMI_SLIPHDMIT_PARAM_SETTINGS_8);
483                 hdmi_write(hdmi, 0x25, HDMI_SLIPHDMIT_PARAM_SETTINGS_9);
484                 hdmi_write(hdmi, 0x04, HDMI_SLIPHDMIT_PARAM_SETTINGS_10);
485         } else if (hdmi->var.pixclock < 30000) {
486                 /* 720p, 8bit, 74.25MHz. Might need to be adjusted for other formats */
487                 /*
488                  * [1:0]        Speed_A
489                  * [3:2]        Speed_B
490                  * [4]          PLLA_Bypass
491                  * [6]          DRV_TEST_EN
492                  * [7]          DRV_TEST_IN
493                  */
494                 hdmi_write(hdmi, 0x0f, HDMI_SLIPHDMIT_PARAM_SETTINGS_1);
495                 /* PLLB_CONFIG[17], PLLA_CONFIG[17] - not in PHY datasheet */
496                 hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_2);
497                 /*
498                  * [2:0]        BGR_I_OFFSET
499                  * [6:4]        BGR_V_OFFSET
500                  */
501                 hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_3);
502                 /* PLLA_CONFIG[7:0]: VCO gain, VCO offset, LPF resistance[0] */
503                 hdmi_write(hdmi, 0x44, HDMI_SLIPHDMIT_PARAM_SETTINGS_5);
504                 /*
505                  * PLLA_CONFIG[15:8]: regulator voltage[0], CP current,
506                  * LPF capacitance, LPF resistance[1]
507                  */
508                 hdmi_write(hdmi, 0x32, HDMI_SLIPHDMIT_PARAM_SETTINGS_6);
509                 /* PLLB_CONFIG[7:0]: LPF resistance[0], VCO offset, VCO gain */
510                 hdmi_write(hdmi, 0x4A, HDMI_SLIPHDMIT_PARAM_SETTINGS_7);
511                 /*
512                  * PLLB_CONFIG[15:8]: regulator voltage[0], CP current,
513                  * LPF capacitance, LPF resistance[1]
514                  */
515                 hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_8);
516                 /* DRV_CONFIG, PE_CONFIG */
517                 hdmi_write(hdmi, 0x25, HDMI_SLIPHDMIT_PARAM_SETTINGS_9);
518                 /*
519                  * [2:0]        AMON_SEL (4 == LPF voltage)
520                  * [4]          PLLA_CONFIG[16]
521                  * [5]          PLLB_CONFIG[16]
522                  */
523                 hdmi_write(hdmi, 0x04, HDMI_SLIPHDMIT_PARAM_SETTINGS_10);
524         } else {
525                 /* for 480p8bit 27MHz */
526                 hdmi_write(hdmi, 0x19, HDMI_SLIPHDMIT_PARAM_SETTINGS_1);
527                 hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_2);
528                 hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_3);
529                 hdmi_write(hdmi, 0x44, HDMI_SLIPHDMIT_PARAM_SETTINGS_5);
530                 hdmi_write(hdmi, 0x32, HDMI_SLIPHDMIT_PARAM_SETTINGS_6);
531                 hdmi_write(hdmi, 0x48, HDMI_SLIPHDMIT_PARAM_SETTINGS_7);
532                 hdmi_write(hdmi, 0x0F, HDMI_SLIPHDMIT_PARAM_SETTINGS_8);
533                 hdmi_write(hdmi, 0x20, HDMI_SLIPHDMIT_PARAM_SETTINGS_9);
534                 hdmi_write(hdmi, 0x04, HDMI_SLIPHDMIT_PARAM_SETTINGS_10);
535         }
536 }
537
538 /**
539  * sh_hdmi_avi_infoframe_setup() - Auxiliary Video Information InfoFrame CONTROL PACKET
540  */
541 static void sh_hdmi_avi_infoframe_setup(struct sh_hdmi *hdmi)
542 {
543         u8 vic;
544
545         /* AVI InfoFrame */
546         hdmi_write(hdmi, 0x06, HDMI_CTRL_PKT_BUF_INDEX);
547
548         /* Packet Type = 0x82 */
549         hdmi_write(hdmi, 0x82, HDMI_CTRL_PKT_BUF_ACCESS_HB0);
550
551         /* Version = 0x02 */
552         hdmi_write(hdmi, 0x02, HDMI_CTRL_PKT_BUF_ACCESS_HB1);
553
554         /* Length = 13 (0x0D) */
555         hdmi_write(hdmi, 0x0D, HDMI_CTRL_PKT_BUF_ACCESS_HB2);
556
557         /* N. A. Checksum */
558         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB0);
559
560         /*
561          * Y = RGB
562          * A0 = No Data
563          * B = Bar Data not valid
564          * S = No Data
565          */
566         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB1);
567
568         /*
569          * [7:6] C = Colorimetry: no data
570          * [5:4] M = 2: 16:9, 1: 4:3 Picture Aspect Ratio
571          * [3:0] R = 8: Active Frame Aspect Ratio: same as picture aspect ratio
572          */
573         hdmi_write(hdmi, 0x28, HDMI_CTRL_PKT_BUF_ACCESS_PB2);
574
575         /*
576          * ITC = No Data
577          * EC = xvYCC601
578          * Q = Default (depends on video format)
579          * SC = No Known non_uniform Scaling
580          */
581         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB3);
582
583         /*
584          * VIC should be ignored if external config is used, so, we could just use 0,
585          * but play safe and use a valid value in any case just in case
586          */
587         if (hdmi->preprogrammed_vic)
588                 vic = hdmi->preprogrammed_vic;
589         else
590                 vic = 4;
591         hdmi_write(hdmi, vic, HDMI_CTRL_PKT_BUF_ACCESS_PB4);
592
593         /* PR = No Repetition */
594         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB5);
595
596         /* Line Number of End of Top Bar (lower 8 bits) */
597         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB6);
598
599         /* Line Number of End of Top Bar (upper 8 bits) */
600         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB7);
601
602         /* Line Number of Start of Bottom Bar (lower 8 bits) */
603         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB8);
604
605         /* Line Number of Start of Bottom Bar (upper 8 bits) */
606         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB9);
607
608         /* Pixel Number of End of Left Bar (lower 8 bits) */
609         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB10);
610
611         /* Pixel Number of End of Left Bar (upper 8 bits) */
612         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB11);
613
614         /* Pixel Number of Start of Right Bar (lower 8 bits) */
615         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB12);
616
617         /* Pixel Number of Start of Right Bar (upper 8 bits) */
618         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB13);
619 }
620
621 /**
622  * sh_hdmi_audio_infoframe_setup() - Audio InfoFrame of CONTROL PACKET
623  */
624 static void sh_hdmi_audio_infoframe_setup(struct sh_hdmi *hdmi)
625 {
626         /* Audio InfoFrame */
627         hdmi_write(hdmi, 0x08, HDMI_CTRL_PKT_BUF_INDEX);
628
629         /* Packet Type = 0x84 */
630         hdmi_write(hdmi, 0x84, HDMI_CTRL_PKT_BUF_ACCESS_HB0);
631
632         /* Version Number = 0x01 */
633         hdmi_write(hdmi, 0x01, HDMI_CTRL_PKT_BUF_ACCESS_HB1);
634
635         /* 0 Length = 10 (0x0A) */
636         hdmi_write(hdmi, 0x0A, HDMI_CTRL_PKT_BUF_ACCESS_HB2);
637
638         /* n. a. Checksum */
639         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB0);
640
641         /* Audio Channel Count = Refer to Stream Header */
642         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB1);
643
644         /* Refer to Stream Header */
645         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB2);
646
647         /* Format depends on coding type (i.e. CT0...CT3) */
648         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB3);
649
650         /* Speaker Channel Allocation = Front Right + Front Left */
651         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB4);
652
653         /* Level Shift Value = 0 dB, Down - mix is permitted or no information */
654         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB5);
655
656         /* Reserved (0) */
657         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB6);
658         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB7);
659         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB8);
660         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB9);
661         hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB10);
662 }
663
664 /**
665  * sh_hdmi_configure() - Initialise HDMI for output
666  */
667 static void sh_hdmi_configure(struct sh_hdmi *hdmi)
668 {
669         /* Configure video format */
670         sh_hdmi_video_config(hdmi);
671
672         /* Configure audio format */
673         sh_hdmi_audio_config(hdmi);
674
675         /* Configure PHY */
676         sh_hdmi_phy_config(hdmi);
677
678         /* Auxiliary Video Information (AVI) InfoFrame */
679         sh_hdmi_avi_infoframe_setup(hdmi);
680
681         /* Audio InfoFrame */
682         sh_hdmi_audio_infoframe_setup(hdmi);
683
684         /*
685          * Control packet auto send with VSYNC control: auto send
686          * General control, Gamut metadata, ISRC, and ACP packets
687          */
688         hdmi_write(hdmi, 0x8E, HDMI_CTRL_PKT_AUTO_SEND);
689
690         /* FIXME */
691         msleep(10);
692
693         /* PS mode b->d, reset PLLA and PLLB */
694         hdmi_write(hdmi, 0x4C, HDMI_SYSTEM_CTRL);
695
696         udelay(10);
697
698         hdmi_write(hdmi, 0x40, HDMI_SYSTEM_CTRL);
699 }
700
701 static unsigned long sh_hdmi_rate_error(struct sh_hdmi *hdmi,
702                 const struct fb_videomode *mode,
703                 unsigned long *hdmi_rate, unsigned long *parent_rate)
704 {
705         unsigned long target = PICOS2KHZ(mode->pixclock) * 1000, rate_error;
706         struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
707
708         *hdmi_rate = clk_round_rate(hdmi->hdmi_clk, target);
709         if ((long)*hdmi_rate < 0)
710                 *hdmi_rate = clk_get_rate(hdmi->hdmi_clk);
711
712         rate_error = (long)*hdmi_rate > 0 ? abs(*hdmi_rate - target) : ULONG_MAX;
713         if (rate_error && pdata->clk_optimize_parent)
714                 rate_error = pdata->clk_optimize_parent(target, hdmi_rate, parent_rate);
715         else if (clk_get_parent(hdmi->hdmi_clk))
716                 *parent_rate = clk_get_rate(clk_get_parent(hdmi->hdmi_clk));
717
718         dev_dbg(hdmi->dev, "%u-%u-%u-%u x %u-%u-%u-%u\n",
719                 mode->left_margin, mode->xres,
720                 mode->right_margin, mode->hsync_len,
721                 mode->upper_margin, mode->yres,
722                 mode->lower_margin, mode->vsync_len);
723
724         dev_dbg(hdmi->dev, "\t@%lu(+/-%lu)Hz, e=%lu / 1000, r=%uHz, p=%luHz\n", target,
725                 rate_error, rate_error ? 10000 / (10 * target / rate_error) : 0,
726                 mode->refresh, *parent_rate);
727
728         return rate_error;
729 }
730
731 static int sh_hdmi_read_edid(struct sh_hdmi *hdmi, unsigned long *hdmi_rate,
732                              unsigned long *parent_rate)
733 {
734         struct fb_var_screeninfo tmpvar;
735         struct fb_var_screeninfo *var = &tmpvar;
736         const struct fb_videomode *mode, *found = NULL;
737         struct fb_info *info = hdmi->info;
738         struct fb_modelist *modelist = NULL;
739         unsigned int f_width = 0, f_height = 0, f_refresh = 0;
740         unsigned long found_rate_error = ULONG_MAX; /* silly compiler... */
741         bool exact_match = false;
742         u8 edid[128];
743         char *forced;
744         int i;
745
746         /* Read EDID */
747         dev_dbg(hdmi->dev, "Read back EDID code:");
748         for (i = 0; i < 128; i++) {
749                 edid[i] = hdmi_read(hdmi, HDMI_EDID_KSV_FIFO_ACCESS_WINDOW);
750 #ifdef DEBUG
751                 if ((i % 16) == 0) {
752                         printk(KERN_CONT "\n");
753                         printk(KERN_DEBUG "%02X | %02X", i, edid[i]);
754                 } else {
755                         printk(KERN_CONT " %02X", edid[i]);
756                 }
757 #endif
758         }
759 #ifdef DEBUG
760         printk(KERN_CONT "\n");
761 #endif
762
763         if (!hdmi->edid_blocks) {
764                 fb_edid_to_monspecs(edid, &hdmi->monspec);
765                 hdmi->edid_blocks = edid[126] + 1;
766
767                 dev_dbg(hdmi->dev, "%d main modes, %d extension blocks\n",
768                         hdmi->monspec.modedb_len, hdmi->edid_blocks - 1);
769         } else {
770                 dev_dbg(hdmi->dev, "Extension %u detected, DTD start %u\n",
771                         edid[0], edid[2]);
772                 fb_edid_add_monspecs(edid, &hdmi->monspec);
773         }
774
775         if (hdmi->edid_blocks > hdmi->edid_segment_nr * 2 +
776             (hdmi->edid_block_addr >> 7) + 1) {
777                 /* More blocks to read */
778                 if (hdmi->edid_block_addr) {
779                         hdmi->edid_block_addr = 0;
780                         hdmi->edid_segment_nr++;
781                 } else {
782                         hdmi->edid_block_addr = 0x80;
783                 }
784                 /* Set EDID word address  */
785                 hdmi_write(hdmi, hdmi->edid_block_addr, HDMI_EDID_WORD_ADDRESS);
786                 /* Enable EDID interrupt */
787                 hdmi_write(hdmi, 0xC6, HDMI_INTERRUPT_MASK_1);
788                 /* Set EDID segment pointer - starts reading EDID */
789                 hdmi_write(hdmi, hdmi->edid_segment_nr, HDMI_EDID_SEGMENT_POINTER);
790                 return -EAGAIN;
791         }
792
793         /* All E-EDID blocks ready */
794         dev_dbg(hdmi->dev, "%d main and extended modes\n", hdmi->monspec.modedb_len);
795
796         fb_get_options("sh_mobile_lcdc", &forced);
797         if (forced && *forced) {
798                 /* Only primitive parsing so far */
799                 i = sscanf(forced, "%ux%u@%u",
800                            &f_width, &f_height, &f_refresh);
801                 if (i < 2) {
802                         f_width = 0;
803                         f_height = 0;
804                 }
805                 dev_dbg(hdmi->dev, "Forced mode %ux%u@%uHz\n",
806                         f_width, f_height, f_refresh);
807         }
808
809         /* Walk monitor modes to find the best or the exact match */
810         for (i = 0, mode = hdmi->monspec.modedb;
811              f_width && f_height && i < hdmi->monspec.modedb_len && !exact_match;
812              i++, mode++) {
813                 unsigned long rate_error;
814
815                 /* No interest in unmatching modes */
816                 if (f_width != mode->xres || f_height != mode->yres)
817                         continue;
818
819                 rate_error = sh_hdmi_rate_error(hdmi, mode, hdmi_rate, parent_rate);
820
821                 if (f_refresh == mode->refresh || (!f_refresh && !rate_error))
822                         /*
823                          * Exact match if either the refresh rate matches or it
824                          * hasn't been specified and we've found a mode, for
825                          * which we can configure the clock precisely
826                          */
827                         exact_match = true;
828                 else if (found && found_rate_error <= rate_error)
829                         /*
830                          * We otherwise search for the closest matching clock
831                          * rate - either if no refresh rate has been specified
832                          * or we cannot find an exactly matching one
833                          */
834                         continue;
835
836                 /* Check if supported: sufficient fb memory, supported clock-rate */
837                 fb_videomode_to_var(var, mode);
838
839                 if (info && info->fbops->fb_check_var &&
840                     info->fbops->fb_check_var(var, info)) {
841                         exact_match = false;
842                         continue;
843                 }
844
845                 found = mode;
846                 found_rate_error = rate_error;
847         }
848
849         hdmi->var.width = hdmi->monspec.max_x * 10;
850         hdmi->var.height = hdmi->monspec.max_y * 10;
851
852         /*
853          * TODO 1: if no ->info is present, postpone running the config until
854          * after ->info first gets registered.
855          * TODO 2: consider registering the HDMI platform device from the LCDC
856          * driver, and passing ->info with HDMI platform data.
857          */
858         if (info && !found) {
859                 modelist = hdmi->info->modelist.next &&
860                         !list_empty(&hdmi->info->modelist) ?
861                         list_entry(hdmi->info->modelist.next,
862                                    struct fb_modelist, list) :
863                         NULL;
864
865                 if (modelist) {
866                         found = &modelist->mode;
867                         found_rate_error = sh_hdmi_rate_error(hdmi, found, hdmi_rate, parent_rate);
868                 }
869         }
870
871         /* No cookie today */
872         if (!found)
873                 return -ENXIO;
874
875         if (found->xres == 640 && found->yres == 480 && found->refresh == 60)
876                 hdmi->preprogrammed_vic = 1;
877         else if (found->xres == 720 && found->yres == 480 && found->refresh == 60)
878                 hdmi->preprogrammed_vic = 2;
879         else if (found->xres == 720 && found->yres == 576 && found->refresh == 50)
880                 hdmi->preprogrammed_vic = 17;
881         else if (found->xres == 1280 && found->yres == 720 && found->refresh == 60)
882                 hdmi->preprogrammed_vic = 4;
883         else if (found->xres == 1920 && found->yres == 1080 && found->refresh == 24)
884                 hdmi->preprogrammed_vic = 32;
885         else if (found->xres == 1920 && found->yres == 1080 && found->refresh == 50)
886                 hdmi->preprogrammed_vic = 31;
887         else if (found->xres == 1920 && found->yres == 1080 && found->refresh == 60)
888                 hdmi->preprogrammed_vic = 16;
889         else
890                 hdmi->preprogrammed_vic = 0;
891
892         dev_dbg(hdmi->dev, "Using %s %s mode %ux%u@%uHz (%luHz), clock error %luHz\n",
893                 modelist ? "default" : "EDID", hdmi->preprogrammed_vic ? "VIC" : "external",
894                 found->xres, found->yres, found->refresh,
895                 PICOS2KHZ(found->pixclock) * 1000, found_rate_error);
896
897         fb_videomode_to_var(&hdmi->var, found);
898         sh_hdmi_external_video_param(hdmi);
899
900         return 0;
901 }
902
903 static irqreturn_t sh_hdmi_hotplug(int irq, void *dev_id)
904 {
905         struct sh_hdmi *hdmi = dev_id;
906         u8 status1, status2, mask1, mask2;
907
908         /* mode_b and PLLA and PLLB reset */
909         hdmi_write(hdmi, 0x2C, HDMI_SYSTEM_CTRL);
910
911         /* How long shall reset be held? */
912         udelay(10);
913
914         /* mode_b and PLLA and PLLB reset release */
915         hdmi_write(hdmi, 0x20, HDMI_SYSTEM_CTRL);
916
917         status1 = hdmi_read(hdmi, HDMI_INTERRUPT_STATUS_1);
918         status2 = hdmi_read(hdmi, HDMI_INTERRUPT_STATUS_2);
919
920         mask1 = hdmi_read(hdmi, HDMI_INTERRUPT_MASK_1);
921         mask2 = hdmi_read(hdmi, HDMI_INTERRUPT_MASK_2);
922
923         /* Correct would be to ack only set bits, but the datasheet requires 0xff */
924         hdmi_write(hdmi, 0xFF, HDMI_INTERRUPT_STATUS_1);
925         hdmi_write(hdmi, 0xFF, HDMI_INTERRUPT_STATUS_2);
926
927         if (printk_ratelimit())
928                 dev_dbg(hdmi->dev, "IRQ #%d: Status #1: 0x%x & 0x%x, #2: 0x%x & 0x%x\n",
929                         irq, status1, mask1, status2, mask2);
930
931         if (!((status1 & mask1) | (status2 & mask2))) {
932                 return IRQ_NONE;
933         } else if (status1 & 0xc0) {
934                 u8 msens;
935
936                 /* Datasheet specifies 10ms... */
937                 udelay(500);
938
939                 msens = hdmi_read(hdmi, HDMI_HOT_PLUG_MSENS_STATUS);
940                 dev_dbg(hdmi->dev, "MSENS 0x%x\n", msens);
941                 /* Check, if hot plug & MSENS pin status are both high */
942                 if ((msens & 0xC0) == 0xC0) {
943                         /* Display plug in */
944                         hdmi->edid_segment_nr = 0;
945                         hdmi->edid_block_addr = 0;
946                         hdmi->edid_blocks = 0;
947                         hdmi->hp_state = HDMI_HOTPLUG_CONNECTED;
948
949                         /* Set EDID word address  */
950                         hdmi_write(hdmi, 0x00, HDMI_EDID_WORD_ADDRESS);
951                         /* Enable EDID interrupt */
952                         hdmi_write(hdmi, 0xC6, HDMI_INTERRUPT_MASK_1);
953                         /* Set EDID segment pointer - starts reading EDID */
954                         hdmi_write(hdmi, 0x00, HDMI_EDID_SEGMENT_POINTER);
955                 } else if (!(status1 & 0x80)) {
956                         /* Display unplug, beware multiple interrupts */
957                         if (hdmi->hp_state != HDMI_HOTPLUG_DISCONNECTED) {
958                                 hdmi->hp_state = HDMI_HOTPLUG_DISCONNECTED;
959                                 schedule_delayed_work(&hdmi->edid_work, 0);
960                         }
961                         /* display_off will switch back to mode_a */
962                 }
963         } else if (status1 & 2) {
964                 /* EDID error interrupt: retry */
965                 /* Set EDID word address  */
966                 hdmi_write(hdmi, hdmi->edid_block_addr, HDMI_EDID_WORD_ADDRESS);
967                 /* Set EDID segment pointer */
968                 hdmi_write(hdmi, hdmi->edid_segment_nr, HDMI_EDID_SEGMENT_POINTER);
969         } else if (status1 & 4) {
970                 /* Disable EDID interrupt */
971                 hdmi_write(hdmi, 0xC0, HDMI_INTERRUPT_MASK_1);
972                 schedule_delayed_work(&hdmi->edid_work, msecs_to_jiffies(10));
973         }
974
975         return IRQ_HANDLED;
976 }
977
978 /* locking:     called with info->lock held, or before register_framebuffer() */
979 static void sh_hdmi_display_on(void *arg, struct fb_info *info)
980 {
981         /*
982          * info is guaranteed to be valid, when we are called, because our
983          * FB_EVENT_FB_UNBIND notify is also called with info->lock held
984          */
985         struct sh_hdmi *hdmi = arg;
986         struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
987         struct sh_mobile_lcdc_chan *ch = info->par;
988
989         dev_dbg(hdmi->dev, "%s(%p): state %x\n", __func__,
990                 pdata->lcd_dev, info->state);
991
992         /* No need to lock */
993         hdmi->info = info;
994
995         /*
996          * hp_state can be set to
997          * HDMI_HOTPLUG_DISCONNECTED:   on monitor unplug
998          * HDMI_HOTPLUG_CONNECTED:      on monitor plug-in
999          * HDMI_HOTPLUG_EDID_DONE:      on EDID read completion
1000          */
1001         switch (hdmi->hp_state) {
1002         case HDMI_HOTPLUG_EDID_DONE:
1003                 /* PS mode d->e. All functions are active */
1004                 hdmi_write(hdmi, 0x80, HDMI_SYSTEM_CTRL);
1005                 dev_dbg(hdmi->dev, "HDMI running\n");
1006                 break;
1007         case HDMI_HOTPLUG_DISCONNECTED:
1008                 info->state = FBINFO_STATE_SUSPENDED;
1009         default:
1010                 hdmi->var = ch->display_var;
1011         }
1012 }
1013
1014 /* locking: called with info->lock held */
1015 static void sh_hdmi_display_off(void *arg)
1016 {
1017         struct sh_hdmi *hdmi = arg;
1018         struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
1019
1020         dev_dbg(hdmi->dev, "%s(%p)\n", __func__, pdata->lcd_dev);
1021         /* PS mode e->a */
1022         hdmi_write(hdmi, 0x10, HDMI_SYSTEM_CTRL);
1023 }
1024
1025 static bool sh_hdmi_must_reconfigure(struct sh_hdmi *hdmi)
1026 {
1027         struct fb_info *info = hdmi->info;
1028         struct sh_mobile_lcdc_chan *ch = info->par;
1029         struct fb_var_screeninfo *new_var = &hdmi->var, *old_var = &ch->display_var;
1030         struct fb_videomode mode1, mode2;
1031
1032         fb_var_to_videomode(&mode1, old_var);
1033         fb_var_to_videomode(&mode2, new_var);
1034
1035         dev_dbg(info->dev, "Old %ux%u, new %ux%u\n",
1036                 mode1.xres, mode1.yres, mode2.xres, mode2.yres);
1037
1038         if (fb_mode_is_equal(&mode1, &mode2)) {
1039                 /* It can be a different monitor with an equal video-mode */
1040                 old_var->width = new_var->width;
1041                 old_var->height = new_var->height;
1042                 return false;
1043         }
1044
1045         dev_dbg(info->dev, "Switching %u -> %u lines\n",
1046                 mode1.yres, mode2.yres);
1047         *old_var = *new_var;
1048
1049         return true;
1050 }
1051
1052 /**
1053  * sh_hdmi_clk_configure() - set HDMI clock frequency and enable the clock
1054  * @hdmi:               driver context
1055  * @hdmi_rate:          HDMI clock frequency in Hz
1056  * @parent_rate:        if != 0 - set parent clock rate for optimal precision
1057  * return:              configured positive rate if successful
1058  *                      0 if couldn't set the rate, but managed to enable the
1059  *                      clock, negative error, if couldn't enable the clock
1060  */
1061 static long sh_hdmi_clk_configure(struct sh_hdmi *hdmi, unsigned long hdmi_rate,
1062                                   unsigned long parent_rate)
1063 {
1064         int ret;
1065
1066         if (parent_rate && clk_get_parent(hdmi->hdmi_clk)) {
1067                 ret = clk_set_rate(clk_get_parent(hdmi->hdmi_clk), parent_rate);
1068                 if (ret < 0) {
1069                         dev_warn(hdmi->dev, "Cannot set parent rate %ld: %d\n", parent_rate, ret);
1070                         hdmi_rate = clk_round_rate(hdmi->hdmi_clk, hdmi_rate);
1071                 } else {
1072                         dev_dbg(hdmi->dev, "HDMI set parent frequency %lu\n", parent_rate);
1073                 }
1074         }
1075
1076         ret = clk_set_rate(hdmi->hdmi_clk, hdmi_rate);
1077         if (ret < 0) {
1078                 dev_warn(hdmi->dev, "Cannot set rate %ld: %d\n", hdmi_rate, ret);
1079                 hdmi_rate = 0;
1080         } else {
1081                 dev_dbg(hdmi->dev, "HDMI set frequency %lu\n", hdmi_rate);
1082         }
1083
1084         return hdmi_rate;
1085 }
1086
1087 /* Hotplug interrupt occurred, read EDID */
1088 static void sh_hdmi_edid_work_fn(struct work_struct *work)
1089 {
1090         struct sh_hdmi *hdmi = container_of(work, struct sh_hdmi, edid_work.work);
1091         struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
1092         struct sh_mobile_lcdc_chan *ch;
1093         int ret;
1094
1095         dev_dbg(hdmi->dev, "%s(%p): begin, hotplug status %d\n", __func__,
1096                 pdata->lcd_dev, hdmi->hp_state);
1097
1098         if (!pdata->lcd_dev)
1099                 return;
1100
1101         mutex_lock(&hdmi->mutex);
1102
1103         if (hdmi->hp_state == HDMI_HOTPLUG_CONNECTED) {
1104                 unsigned long parent_rate = 0, hdmi_rate;
1105
1106                 /* A device has been plugged in */
1107                 pm_runtime_get_sync(hdmi->dev);
1108
1109                 ret = sh_hdmi_read_edid(hdmi, &hdmi_rate, &parent_rate);
1110                 if (ret < 0)
1111                         goto out;
1112
1113                 hdmi->hp_state = HDMI_HOTPLUG_EDID_DONE;
1114
1115                 /* Reconfigure the clock */
1116                 ret = sh_hdmi_clk_configure(hdmi, hdmi_rate, parent_rate);
1117                 if (ret < 0)
1118                         goto out;
1119
1120                 msleep(10);
1121                 sh_hdmi_configure(hdmi);
1122                 /* Switched to another (d) power-save mode */
1123                 msleep(10);
1124
1125                 if (!hdmi->info)
1126                         goto out;
1127
1128                 ch = hdmi->info->par;
1129
1130                 acquire_console_sem();
1131
1132                 /* HDMI plug in */
1133                 if (!sh_hdmi_must_reconfigure(hdmi) &&
1134                     hdmi->info->state == FBINFO_STATE_RUNNING) {
1135                         /*
1136                          * First activation with the default monitor - just turn
1137                          * on, if we run a resume here, the logo disappears
1138                          */
1139                         if (lock_fb_info(hdmi->info)) {
1140                                 struct fb_info *info = hdmi->info;
1141                                 info->var.width = hdmi->var.width;
1142                                 info->var.height = hdmi->var.height;
1143                                 sh_hdmi_display_on(hdmi, info);
1144                                 unlock_fb_info(info);
1145                         }
1146                 } else {
1147                         /* New monitor or have to wake up */
1148                         fb_set_suspend(hdmi->info, 0);
1149                 }
1150
1151                 release_console_sem();
1152         } else {
1153                 ret = 0;
1154                 if (!hdmi->info)
1155                         goto out;
1156
1157                 hdmi->monspec.modedb_len = 0;
1158                 fb_destroy_modedb(hdmi->monspec.modedb);
1159                 hdmi->monspec.modedb = NULL;
1160
1161                 acquire_console_sem();
1162
1163                 /* HDMI disconnect */
1164                 fb_set_suspend(hdmi->info, 1);
1165
1166                 release_console_sem();
1167                 pm_runtime_put(hdmi->dev);
1168         }
1169
1170 out:
1171         if (ret < 0 && ret != -EAGAIN)
1172                 hdmi->hp_state = HDMI_HOTPLUG_DISCONNECTED;
1173         mutex_unlock(&hdmi->mutex);
1174
1175         dev_dbg(hdmi->dev, "%s(%p): end\n", __func__, pdata->lcd_dev);
1176 }
1177
1178 static int sh_hdmi_notify(struct notifier_block *nb,
1179                           unsigned long action, void *data);
1180
1181 static struct notifier_block sh_hdmi_notifier = {
1182         .notifier_call = sh_hdmi_notify,
1183 };
1184
1185 static int sh_hdmi_notify(struct notifier_block *nb,
1186                           unsigned long action, void *data)
1187 {
1188         struct fb_event *event = data;
1189         struct fb_info *info = event->info;
1190         struct sh_mobile_lcdc_chan *ch = info->par;
1191         struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1192         struct sh_hdmi *hdmi = board_cfg->board_data;
1193
1194         if (nb != &sh_hdmi_notifier || !hdmi || hdmi->info != info)
1195                 return NOTIFY_DONE;
1196
1197         switch(action) {
1198         case FB_EVENT_FB_REGISTERED:
1199                 /* Unneeded, activation taken care by sh_hdmi_display_on() */
1200                 break;
1201         case FB_EVENT_FB_UNREGISTERED:
1202                 /*
1203                  * We are called from unregister_framebuffer() with the
1204                  * info->lock held. This is bad for us, because we can race with
1205                  * the scheduled work, which has to call fb_set_suspend(), which
1206                  * takes info->lock internally, so, sh_hdmi_edid_work_fn()
1207                  * cannot take and hold info->lock for the whole function
1208                  * duration. Using an additional lock creates a classical AB-BA
1209                  * lock up. Therefore, we have to release the info->lock
1210                  * temporarily, synchronise with the work queue and re-acquire
1211                  * the info->lock.
1212                  */
1213                 unlock_fb_info(hdmi->info);
1214                 mutex_lock(&hdmi->mutex);
1215                 hdmi->info = NULL;
1216                 mutex_unlock(&hdmi->mutex);
1217                 lock_fb_info(hdmi->info);
1218                 return NOTIFY_OK;
1219         }
1220         return NOTIFY_DONE;
1221 }
1222
1223 static int __init sh_hdmi_probe(struct platform_device *pdev)
1224 {
1225         struct sh_mobile_hdmi_info *pdata = pdev->dev.platform_data;
1226         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1227         struct sh_mobile_lcdc_board_cfg *board_cfg;
1228         int irq = platform_get_irq(pdev, 0), ret;
1229         struct sh_hdmi *hdmi;
1230         long rate;
1231
1232         if (!res || !pdata || irq < 0)
1233                 return -ENODEV;
1234
1235         hdmi = kzalloc(sizeof(*hdmi), GFP_KERNEL);
1236         if (!hdmi) {
1237                 dev_err(&pdev->dev, "Cannot allocate device data\n");
1238                 return -ENOMEM;
1239         }
1240
1241         mutex_init(&hdmi->mutex);
1242
1243         hdmi->dev = &pdev->dev;
1244
1245         hdmi->hdmi_clk = clk_get(&pdev->dev, "ick");
1246         if (IS_ERR(hdmi->hdmi_clk)) {
1247                 ret = PTR_ERR(hdmi->hdmi_clk);
1248                 dev_err(&pdev->dev, "Unable to get clock: %d\n", ret);
1249                 goto egetclk;
1250         }
1251
1252         /* An arbitrary relaxed pixclock just to get things started: from standard 480p */
1253         rate = clk_round_rate(hdmi->hdmi_clk, PICOS2KHZ(37037));
1254         if (rate > 0)
1255                 rate = sh_hdmi_clk_configure(hdmi, rate, 0);
1256
1257         if (rate < 0) {
1258                 ret = rate;
1259                 goto erate;
1260         }
1261
1262         ret = clk_enable(hdmi->hdmi_clk);
1263         if (ret < 0) {
1264                 dev_err(hdmi->dev, "Cannot enable clock: %d\n", ret);
1265                 goto erate;
1266         }
1267
1268         dev_dbg(&pdev->dev, "Enabled HDMI clock at %luHz\n", rate);
1269
1270         if (!request_mem_region(res->start, resource_size(res), dev_name(&pdev->dev))) {
1271                 dev_err(&pdev->dev, "HDMI register region already claimed\n");
1272                 ret = -EBUSY;
1273                 goto ereqreg;
1274         }
1275
1276         hdmi->base = ioremap(res->start, resource_size(res));
1277         if (!hdmi->base) {
1278                 dev_err(&pdev->dev, "HDMI register region already claimed\n");
1279                 ret = -ENOMEM;
1280                 goto emap;
1281         }
1282
1283         platform_set_drvdata(pdev, hdmi);
1284
1285         /* Set up LCDC callbacks */
1286         board_cfg = &pdata->lcd_chan->board_cfg;
1287         board_cfg->owner = THIS_MODULE;
1288         board_cfg->board_data = hdmi;
1289         board_cfg->display_on = sh_hdmi_display_on;
1290         board_cfg->display_off = sh_hdmi_display_off;
1291
1292         INIT_DELAYED_WORK(&hdmi->edid_work, sh_hdmi_edid_work_fn);
1293
1294         pm_runtime_enable(&pdev->dev);
1295         pm_runtime_resume(&pdev->dev);
1296
1297         /* Product and revision IDs are 0 in sh-mobile version */
1298         dev_info(&pdev->dev, "Detected HDMI controller 0x%x:0x%x\n",
1299                  hdmi_read(hdmi, HDMI_PRODUCT_ID), hdmi_read(hdmi, HDMI_REVISION_ID));
1300
1301         ret = request_irq(irq, sh_hdmi_hotplug, 0,
1302                           dev_name(&pdev->dev), hdmi);
1303         if (ret < 0) {
1304                 dev_err(&pdev->dev, "Unable to request irq: %d\n", ret);
1305                 goto ereqirq;
1306         }
1307
1308         ret = snd_soc_register_codec(&pdev->dev,
1309                         &soc_codec_dev_sh_hdmi, &sh_hdmi_dai, 1);
1310         if (ret < 0) {
1311                 dev_err(&pdev->dev, "codec registration failed\n");
1312                 goto ecodec;
1313         }
1314
1315         return 0;
1316
1317 ecodec:
1318         free_irq(irq, hdmi);
1319 ereqirq:
1320         pm_runtime_disable(&pdev->dev);
1321         iounmap(hdmi->base);
1322 emap:
1323         release_mem_region(res->start, resource_size(res));
1324 ereqreg:
1325         clk_disable(hdmi->hdmi_clk);
1326 erate:
1327         clk_put(hdmi->hdmi_clk);
1328 egetclk:
1329         mutex_destroy(&hdmi->mutex);
1330         kfree(hdmi);
1331
1332         return ret;
1333 }
1334
1335 static int __exit sh_hdmi_remove(struct platform_device *pdev)
1336 {
1337         struct sh_mobile_hdmi_info *pdata = pdev->dev.platform_data;
1338         struct sh_hdmi *hdmi = platform_get_drvdata(pdev);
1339         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1340         struct sh_mobile_lcdc_board_cfg *board_cfg = &pdata->lcd_chan->board_cfg;
1341         int irq = platform_get_irq(pdev, 0);
1342
1343         snd_soc_unregister_codec(&pdev->dev);
1344
1345         board_cfg->display_on = NULL;
1346         board_cfg->display_off = NULL;
1347         board_cfg->board_data = NULL;
1348         board_cfg->owner = NULL;
1349
1350         /* No new work will be scheduled, wait for running ISR */
1351         free_irq(irq, hdmi);
1352         /* Wait for already scheduled work */
1353         cancel_delayed_work_sync(&hdmi->edid_work);
1354         pm_runtime_disable(&pdev->dev);
1355         clk_disable(hdmi->hdmi_clk);
1356         clk_put(hdmi->hdmi_clk);
1357         iounmap(hdmi->base);
1358         release_mem_region(res->start, resource_size(res));
1359         mutex_destroy(&hdmi->mutex);
1360         kfree(hdmi);
1361
1362         return 0;
1363 }
1364
1365 static struct platform_driver sh_hdmi_driver = {
1366         .remove         = __exit_p(sh_hdmi_remove),
1367         .driver = {
1368                 .name   = "sh-mobile-hdmi",
1369         },
1370 };
1371
1372 static int __init sh_hdmi_init(void)
1373 {
1374         return platform_driver_probe(&sh_hdmi_driver, sh_hdmi_probe);
1375 }
1376 module_init(sh_hdmi_init);
1377
1378 static void __exit sh_hdmi_exit(void)
1379 {
1380         platform_driver_unregister(&sh_hdmi_driver);
1381 }
1382 module_exit(sh_hdmi_exit);
1383
1384 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1385 MODULE_DESCRIPTION("SuperH / ARM-shmobile HDMI driver");
1386 MODULE_LICENSE("GPL v2");