]> git.kernelconcepts.de Git - karo-tx-uboot.git/blob - board/cm-bf548/video.c
4703098149590df0487ff13d3744d1d47145dc70
[karo-tx-uboot.git] / board / cm-bf548 / video.c
1 /*
2  * video.c - run splash screen on lcd
3  *
4  * Copyright (c) 2007-2008 Analog Devices Inc.
5  *
6  * Licensed under the GPL-2 or later.
7  */
8
9 #include <stdarg.h>
10 #include <common.h>
11 #include <config.h>
12 #include <malloc.h>
13 #include <asm/blackfin.h>
14 #include <asm/gpio.h>
15 #include <asm/portmux.h>
16 #include <asm/mach-common/bits/dma.h>
17 #include <i2c.h>
18 #include <linux/types.h>
19 #include <stdio_dev.h>
20
21 #ifdef CONFIG_VIDEO
22
23 #define DMA_SIZE16      2
24
25 #include <asm/mach-common/bits/eppi.h>
26
27 #include <asm/bfin_logo_230x230.h>
28
29 #define LCD_X_RES               480     /*Horizontal Resolution */
30 #define LCD_Y_RES               272     /* Vertical Resolution */
31
32 #define LCD_BPP                 24      /* Bit Per Pixel */
33 #define LCD_PIXEL_SIZE          (LCD_BPP / 8)
34 #define DMA_BUS_SIZE            32
35 #define ACTIVE_VIDEO_MEM_OFFSET 0
36
37 /*      -- Horizontal synchronizing --
38  *
39  * Timing characteristics taken from the SHARP LQ043T1DG01 datasheet
40  * (LCY-W-06602A Page 9 of 22)
41  *
42  * Clock Frequency      1/Tc Min 7.83 Typ 9.00 Max 9.26 MHz
43  *
44  * Period               TH - 525 - Clock
45  * Pulse width          THp - 41 - Clock
46  * Horizontal period    THd - 480 - Clock
47  * Back porch           THb - 2 - Clock
48  * Front porch          THf - 2 - Clock
49  *
50  * -- Vertical synchronizing --
51  * Period               TV - 286 - Line
52  * Pulse width          TVp - 10 - Line
53  * Vertical period      TVd - 272 - Line
54  * Back porch           TVb - 2 - Line
55  * Front porch          TVf - 2 - Line
56  */
57
58 #define LCD_CLK                 (8*1000*1000)   /* 8MHz */
59
60 /* # active data to transfer after Horizontal Delay clock */
61 #define EPPI_HCOUNT             LCD_X_RES
62
63 /* # active lines to transfer after Vertical Delay clock */
64 #define EPPI_VCOUNT             LCD_Y_RES
65
66 /* Samples per Line = 480 (active data) + 45 (padding) */
67 #define EPPI_LINE               525
68
69 /* Lines per Frame = 272 (active data) + 14 (padding) */
70 #define EPPI_FRAME              286
71
72 /* FS1 (Hsync) Width (Typical)*/
73 #define EPPI_FS1W_HBL           41
74
75 /* FS1 (Hsync) Period (Typical) */
76 #define EPPI_FS1P_AVPL          EPPI_LINE
77
78 /* Horizontal Delay clock after assertion of Hsync (Typical) */
79 #define EPPI_HDELAY             43
80
81 /* FS2 (Vsync) Width    = FS1 (Hsync) Period * 10 */
82 #define EPPI_FS2W_LVB           (EPPI_LINE * 10)
83
84  /* FS2 (Vsync) Period   = FS1 (Hsync) Period * Lines per Frame */
85 #define EPPI_FS2P_LAVF          (EPPI_LINE * EPPI_FRAME)
86
87 /* Vertical Delay after assertion of Vsync (2 Lines) */
88 #define EPPI_VDELAY             12
89
90 #define EPPI_CLIP               0xFF00FF00
91
92 /* EPPI Control register configuration value for RGB out
93  * - EPPI as Output
94  * GP 2 frame sync mode,
95  * Internal Clock generation disabled, Internal FS generation enabled,
96  * Receives samples on EPPI_CLK raising edge, Transmits samples on EPPI_CLK falling edge,
97  * FS1 & FS2 are active high,
98  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
99  * DMA Unpacking disabled when RGB Formating is enabled, otherwise DMA unpacking enabled
100  * Swapping Enabled,
101  * One (DMA) Channel Mode,
102  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
103  * Regular watermark - when FIFO is 100% full,
104  * Urgent watermark - when FIFO is 75% full
105  */
106
107 #define EPPI_CONTROL            (0x20136E2E)
108
109 static inline u16 get_eppi_clkdiv(u32 target_ppi_clk)
110 {
111         u32 sclk = get_sclk();
112
113         /* EPPI_CLK = (SCLK) / (2 * (EPPI_CLKDIV[15:0] + 1)) */
114
115         return (((sclk / target_ppi_clk) / 2) - 1);
116 }
117
118 void Init_PPI(void)
119 {
120         u16 eppi_clkdiv = get_eppi_clkdiv(LCD_CLK);
121
122         bfin_write_EPPI0_FS1W_HBL(EPPI_FS1W_HBL);
123         bfin_write_EPPI0_FS1P_AVPL(EPPI_FS1P_AVPL);
124         bfin_write_EPPI0_FS2W_LVB(EPPI_FS2W_LVB);
125         bfin_write_EPPI0_FS2P_LAVF(EPPI_FS2P_LAVF);
126         bfin_write_EPPI0_CLIP(EPPI_CLIP);
127
128         bfin_write_EPPI0_FRAME(EPPI_FRAME);
129         bfin_write_EPPI0_LINE(EPPI_LINE);
130
131         bfin_write_EPPI0_HCOUNT(EPPI_HCOUNT);
132         bfin_write_EPPI0_HDELAY(EPPI_HDELAY);
133         bfin_write_EPPI0_VCOUNT(EPPI_VCOUNT);
134         bfin_write_EPPI0_VDELAY(EPPI_VDELAY);
135
136         bfin_write_EPPI0_CLKDIV(eppi_clkdiv);
137
138 /*
139  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
140  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
141  */
142 #if defined(CONFIG_VIDEO_RGB666)
143         bfin_write_EPPI0_CONTROL((EPPI_CONTROL & ~DLENGTH) | DLEN_18 |
144                                  RGB_FMT_EN);
145 #else
146         bfin_write_EPPI0_CONTROL(((EPPI_CONTROL & ~DLENGTH) | DLEN_24) &
147                                  ~RGB_FMT_EN);
148 #endif
149
150 }
151
152 #define               DEB2_URGENT  0x2000       /* DEB2 Urgent */
153
154 void Init_DMA(void *dst)
155 {
156 #if defined(CONFIG_DEB_DMA_URGENT)
157         bfin_write_EBIU_DDRQUE(bfin_read_EBIU_DDRQUE() | DEB2_URGENT);
158 #endif
159
160         bfin_write_DMA12_START_ADDR(dst);
161
162         /* X count */
163         bfin_write_DMA12_X_COUNT((LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
164         bfin_write_DMA12_X_MODIFY(DMA_BUS_SIZE / 8);
165
166         /* Y count */
167         bfin_write_DMA12_Y_COUNT(LCD_Y_RES);
168         bfin_write_DMA12_Y_MODIFY(DMA_BUS_SIZE / 8);
169
170         /* DMA Config */
171         bfin_write_DMA12_CONFIG(
172             WDSIZE_32 | /* 32 bit DMA */
173             DMA2D |             /* 2D DMA */
174             FLOW_AUTO           /* autobuffer mode */
175         );
176 }
177
178 void Init_Ports(void)
179 {
180         const unsigned short pins[] = {
181                 P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3, P_PPI0_D4,
182                 P_PPI0_D5, P_PPI0_D6, P_PPI0_D7, P_PPI0_D8, P_PPI0_D9,
183                 P_PPI0_D10, P_PPI0_D11, P_PPI0_D12, P_PPI0_D13, P_PPI0_D14,
184                 P_PPI0_D15, P_PPI0_D16, P_PPI0_D17,
185 #if !defined(CONFIG_VIDEO_RGB666)
186                 P_PPI0_D18, P_PPI0_D19, P_PPI0_D20, P_PPI0_D21, P_PPI0_D22,
187                 P_PPI0_D23,
188 #endif
189                 P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2, 0,
190         };
191         peripheral_request_list(pins, "lcd");
192
193         gpio_request(GPIO_PE3, "lcd-disp");
194         gpio_direction_output(GPIO_PE3, 1);
195 }
196
197 void EnableDMA(void)
198 {
199         bfin_write_DMA12_CONFIG(bfin_read_DMA12_CONFIG() | DMAEN);
200 }
201
202 void DisableDMA(void)
203 {
204         bfin_write_DMA12_CONFIG(bfin_read_DMA12_CONFIG() & ~DMAEN);
205 }
206
207 /* enable and disable PPI functions */
208 void EnablePPI(void)
209 {
210         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
211 }
212
213 void DisablePPI(void)
214 {
215         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
216 }
217
218 int video_init(void *dst)
219 {
220         Init_Ports();
221         Init_DMA(dst);
222         EnableDMA();
223         Init_PPI();
224         EnablePPI();
225
226         return 0;
227 }
228
229 void video_stop(void)
230 {
231         DisablePPI();
232         DisableDMA();
233 }
234
235 static void dma_bitblit(void *dst, fastimage_t *logo, int x, int y)
236 {
237         if (dcache_status())
238                 blackfin_dcache_flush_range(logo->data,
239                                             logo->data + logo->size);
240
241         bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR);
242
243         /* Setup destination start address */
244         bfin_write_MDMA_D0_START_ADDR(dst + ((x & -2) * LCD_PIXEL_SIZE)
245                                       + (y * LCD_X_RES * LCD_PIXEL_SIZE));
246         /* Setup destination xcount */
247         bfin_write_MDMA_D0_X_COUNT(logo->width * LCD_PIXEL_SIZE / DMA_SIZE16);
248         /* Setup destination xmodify */
249         bfin_write_MDMA_D0_X_MODIFY(DMA_SIZE16);
250
251         /* Setup destination ycount */
252         bfin_write_MDMA_D0_Y_COUNT(logo->height);
253         /* Setup destination ymodify */
254         bfin_write_MDMA_D0_Y_MODIFY((LCD_X_RES - logo->width) * LCD_PIXEL_SIZE +
255                                     DMA_SIZE16);
256
257         /* Setup Source start address */
258         bfin_write_MDMA_S0_START_ADDR(logo->data);
259         /* Setup Source xcount */
260         bfin_write_MDMA_S0_X_COUNT(logo->width * LCD_PIXEL_SIZE / DMA_SIZE16);
261         /* Setup Source xmodify */
262         bfin_write_MDMA_S0_X_MODIFY(DMA_SIZE16);
263
264         /* Setup Source ycount */
265         bfin_write_MDMA_S0_Y_COUNT(logo->height);
266         /* Setup Source ymodify */
267         bfin_write_MDMA_S0_Y_MODIFY(DMA_SIZE16);
268
269         /* Enable source DMA */
270         bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_16 | DMA2D);
271         SSYNC();
272         bfin_write_MDMA_D0_CONFIG(WNR | DMAEN | WDSIZE_16 | DMA2D);
273
274         while (bfin_read_MDMA_D0_IRQ_STATUS() & DMA_RUN) ;
275
276         bfin_write_MDMA_S0_IRQ_STATUS(bfin_read_MDMA_S0_IRQ_STATUS() | DMA_DONE
277                                       | DMA_ERR);
278         bfin_write_MDMA_D0_IRQ_STATUS(bfin_read_MDMA_D0_IRQ_STATUS() | DMA_DONE
279                                       | DMA_ERR);
280
281 }
282
283 void video_putc(const char c)
284 {
285 }
286
287 void video_puts(const char *s)
288 {
289 }
290
291 int drv_video_init(void)
292 {
293         int error, devices = 1;
294         struct stdio_dev videodev;
295
296         u8 *dst;
297         u32 fbmem_size =
298             LCD_X_RES * LCD_Y_RES * LCD_PIXEL_SIZE + ACTIVE_VIDEO_MEM_OFFSET;
299
300         dst = malloc(fbmem_size);
301
302         if (dst == NULL) {
303                 printf("Failed to alloc FB memory\n");
304                 return -1;
305         }
306 #ifdef EASYLOGO_ENABLE_GZIP
307         unsigned char *data = EASYLOGO_DECOMP_BUFFER;
308         unsigned long src_len = EASYLOGO_ENABLE_GZIP;
309         if (gunzip(data, bfin_logo.size, bfin_logo.data, &src_len)) {
310                 puts("Failed to decompress logo\n");
311                 free(dst);
312                 return -1;
313         }
314         bfin_logo.data = data;
315 #endif
316
317         memset(dst + ACTIVE_VIDEO_MEM_OFFSET, bfin_logo.data[0],
318                fbmem_size - ACTIVE_VIDEO_MEM_OFFSET);
319
320         dma_bitblit(dst + ACTIVE_VIDEO_MEM_OFFSET, &bfin_logo,
321                     (LCD_X_RES - bfin_logo.width) / 2,
322                     (LCD_Y_RES - bfin_logo.height) / 2);
323
324         video_init(dst);        /* Video initialization */
325
326         memset(&videodev, 0, sizeof(videodev));
327
328         strcpy(videodev.name, "video");
329         videodev.ext = DEV_EXT_VIDEO;   /* Video extensions */
330         videodev.flags = DEV_FLAGS_SYSTEM;      /* No Output */
331         videodev.putc = video_putc;     /* 'putc' function */
332         videodev.puts = video_puts;     /* 'puts' function */
333
334         error = stdio_register(&videodev);
335
336         return (error == 0) ? devices : error;
337 }
338
339 #endif