Root/
1 | /* |
2 | * linux/drivers/video/fm2fb.c -- BSC FrameMaster II/Rainbow II frame buffer |
3 | * device |
4 | * |
5 | * Copyright (C) 1998 Steffen A. Mork (linux-dev@morknet.de) |
6 | * Copyright (C) 1999 Geert Uytterhoeven |
7 | * |
8 | * Written for 2.0.x by Steffen A. Mork |
9 | * Ported to 2.1.x by Geert Uytterhoeven |
10 | * Ported to new api by James Simmons |
11 | * |
12 | * This file is subject to the terms and conditions of the GNU General Public |
13 | * License. See the file COPYING in the main directory of this archive for |
14 | * more details. |
15 | */ |
16 | |
17 | #include <linux/module.h> |
18 | #include <linux/mm.h> |
19 | #include <linux/fb.h> |
20 | #include <linux/init.h> |
21 | #include <linux/zorro.h> |
22 | #include <asm/io.h> |
23 | |
24 | /* |
25 | * Some technical notes: |
26 | * |
27 | * The BSC FrameMaster II (or Rainbow II) is a simple very dumb |
28 | * frame buffer which allows to display 24 bit true color images. |
29 | * Each pixel is 32 bit width so it's very easy to maintain the |
30 | * frame buffer. One long word has the following layout: |
31 | * AARRGGBB which means: AA the alpha channel byte, RR the red |
32 | * channel, GG the green channel and BB the blue channel. |
33 | * |
34 | * The FrameMaster II supports the following video modes. |
35 | * - PAL/NTSC |
36 | * - interlaced/non interlaced |
37 | * - composite sync/sync/sync over green |
38 | * |
39 | * The resolution is to the following both ones: |
40 | * - 768x576 (PAL) |
41 | * - 768x480 (NTSC) |
42 | * |
43 | * This means that pixel access per line is fixed due to the |
44 | * fixed line width. In case of maximal resolution the frame |
45 | * buffer needs an amount of memory of 1.769.472 bytes which |
46 | * is near to 2 MByte (the allocated address space of Zorro2). |
47 | * The memory is channel interleaved. That means every channel |
48 | * owns four VRAMs. Unfortunatly most FrameMasters II are |
49 | * not assembled with memory for the alpha channel. In this |
50 | * case it could be possible to add the frame buffer into the |
51 | * normal memory pool. |
52 | * |
53 | * At relative address 0x1ffff8 of the frame buffers base address |
54 | * there exists a control register with the number of |
55 | * four control bits. They have the following meaning: |
56 | * bit value meaning |
57 | * |
58 | * 0 1 0=interlaced/1=non interlaced |
59 | * 1 2 0=video out disabled/1=video out enabled |
60 | * 2 4 0=normal mode as jumpered via JP8/1=complement mode |
61 | * 3 8 0=read onboard ROM/1 normal operation (required) |
62 | * |
63 | * As mentioned above there are several jumper. I think there |
64 | * is not very much information about the FrameMaster II in |
65 | * the world so I add these information for completeness. |
66 | * |
67 | * JP1 interlace selection (1-2 non interlaced/2-3 interlaced) |
68 | * JP2 wait state creation (leave as is!) |
69 | * JP3 wait state creation (leave as is!) |
70 | * JP4 modulate composite sync on green output (1-2 composite |
71 | * sync on green channel/2-3 normal composite sync) |
72 | * JP5 create test signal, shorting this jumper will create |
73 | * a white screen |
74 | * JP6 sync creation (1-2 composite sync/2-3 H-sync output) |
75 | * JP8 video mode (1-2 PAL/2-3 NTSC) |
76 | * |
77 | * With the following jumpering table you can connect the |
78 | * FrameMaster II to a normal TV via SCART connector: |
79 | * JP1: 2-3 |
80 | * JP4: 2-3 |
81 | * JP6: 2-3 |
82 | * JP8: 1-2 (means PAL for Europe) |
83 | * |
84 | * NOTE: |
85 | * There is no other possibility to change the video timings |
86 | * except the interlaced/non interlaced, sync control and the |
87 | * video mode PAL (50 Hz)/NTSC (60 Hz). Inside this |
88 | * FrameMaster II driver are assumed values to avoid anomalies |
89 | * to a future X server. Except the pixel clock is really |
90 | * constant at 30 MHz. |
91 | * |
92 | * 9 pin female video connector: |
93 | * |
94 | * 1 analog red 0.7 Vss |
95 | * 2 analog green 0.7 Vss |
96 | * 3 analog blue 0.7 Vss |
97 | * 4 H-sync TTL |
98 | * 5 V-sync TTL |
99 | * 6 ground |
100 | * 7 ground |
101 | * 8 ground |
102 | * 9 ground |
103 | * |
104 | * Some performance notes: |
105 | * The FrameMaster II was not designed to display a console |
106 | * this driver would do! It was designed to display still true |
107 | * color images. Imagine: When scroll up a text line there |
108 | * must copied ca. 1.7 MBytes to another place inside this |
109 | * frame buffer. This means 1.7 MByte read and 1.7 MByte write |
110 | * over the slow 16 bit wide Zorro2 bus! A scroll of one |
111 | * line needs 1 second so do not expect to much from this |
112 | * driver - he is at the limit! |
113 | * |
114 | */ |
115 | |
116 | /* |
117 | * definitions |
118 | */ |
119 | |
120 | #define FRAMEMASTER_SIZE 0x200000 |
121 | #define FRAMEMASTER_REG 0x1ffff8 |
122 | |
123 | #define FRAMEMASTER_NOLACE 1 |
124 | #define FRAMEMASTER_ENABLE 2 |
125 | #define FRAMEMASTER_COMPL 4 |
126 | #define FRAMEMASTER_ROM 8 |
127 | |
128 | static volatile unsigned char *fm2fb_reg; |
129 | |
130 | static struct fb_fix_screeninfo fb_fix __devinitdata = { |
131 | .smem_len = FRAMEMASTER_REG, |
132 | .type = FB_TYPE_PACKED_PIXELS, |
133 | .visual = FB_VISUAL_TRUECOLOR, |
134 | .line_length = (768 << 2), |
135 | .mmio_len = (8), |
136 | .accel = FB_ACCEL_NONE, |
137 | }; |
138 | |
139 | static int fm2fb_mode __devinitdata = -1; |
140 | |
141 | #define FM2FB_MODE_PAL 0 |
142 | #define FM2FB_MODE_NTSC 1 |
143 | |
144 | static struct fb_var_screeninfo fb_var_modes[] __devinitdata = { |
145 | { |
146 | /* 768 x 576, 32 bpp (PAL) */ |
147 | 768, 576, 768, 576, 0, 0, 32, 0, |
148 | { 16, 8, 0 }, { 8, 8, 0 }, { 0, 8, 0 }, { 24, 8, 0 }, |
149 | 0, FB_ACTIVATE_NOW, -1, -1, FB_ACCEL_NONE, |
150 | 33333, 10, 102, 10, 5, 80, 34, FB_SYNC_COMP_HIGH_ACT, 0 |
151 | }, { |
152 | /* 768 x 480, 32 bpp (NTSC - not supported yet */ |
153 | 768, 480, 768, 480, 0, 0, 32, 0, |
154 | { 16, 8, 0 }, { 8, 8, 0 }, { 0, 8, 0 }, { 24, 8, 0 }, |
155 | 0, FB_ACTIVATE_NOW, -1, -1, FB_ACCEL_NONE, |
156 | 33333, 10, 102, 10, 5, 80, 34, FB_SYNC_COMP_HIGH_ACT, 0 |
157 | } |
158 | }; |
159 | |
160 | /* |
161 | * Interface used by the world |
162 | */ |
163 | |
164 | static int fm2fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, |
165 | u_int transp, struct fb_info *info); |
166 | static int fm2fb_blank(int blank, struct fb_info *info); |
167 | |
168 | static struct fb_ops fm2fb_ops = { |
169 | .owner = THIS_MODULE, |
170 | .fb_setcolreg = fm2fb_setcolreg, |
171 | .fb_blank = fm2fb_blank, |
172 | .fb_fillrect = cfb_fillrect, |
173 | .fb_copyarea = cfb_copyarea, |
174 | .fb_imageblit = cfb_imageblit, |
175 | }; |
176 | |
177 | /* |
178 | * Blank the display. |
179 | */ |
180 | static int fm2fb_blank(int blank, struct fb_info *info) |
181 | { |
182 | unsigned char t = FRAMEMASTER_ROM; |
183 | |
184 | if (!blank) |
185 | t |= FRAMEMASTER_ENABLE | FRAMEMASTER_NOLACE; |
186 | fm2fb_reg[0] = t; |
187 | return 0; |
188 | } |
189 | |
190 | /* |
191 | * Set a single color register. The values supplied are already |
192 | * rounded down to the hardware's capabilities (according to the |
193 | * entries in the var structure). Return != 0 for invalid regno. |
194 | */ |
195 | static int fm2fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, |
196 | u_int transp, struct fb_info *info) |
197 | { |
198 | if (regno < 16) { |
199 | red >>= 8; |
200 | green >>= 8; |
201 | blue >>= 8; |
202 | |
203 | ((u32*)(info->pseudo_palette))[regno] = (red << 16) | |
204 | (green << 8) | blue; |
205 | } |
206 | |
207 | return 0; |
208 | } |
209 | |
210 | /* |
211 | * Initialisation |
212 | */ |
213 | |
214 | static int __devinit fm2fb_probe(struct zorro_dev *z, |
215 | const struct zorro_device_id *id); |
216 | |
217 | static struct zorro_device_id fm2fb_devices[] __devinitdata = { |
218 | { ZORRO_PROD_BSC_FRAMEMASTER_II }, |
219 | { ZORRO_PROD_HELFRICH_RAINBOW_II }, |
220 | { 0 } |
221 | }; |
222 | |
223 | static struct zorro_driver fm2fb_driver = { |
224 | .name = "fm2fb", |
225 | .id_table = fm2fb_devices, |
226 | .probe = fm2fb_probe, |
227 | }; |
228 | |
229 | static int __devinit fm2fb_probe(struct zorro_dev *z, |
230 | const struct zorro_device_id *id) |
231 | { |
232 | struct fb_info *info; |
233 | unsigned long *ptr; |
234 | int is_fm; |
235 | int x, y; |
236 | |
237 | is_fm = z->id == ZORRO_PROD_BSC_FRAMEMASTER_II; |
238 | |
239 | if (!zorro_request_device(z,"fm2fb")) |
240 | return -ENXIO; |
241 | |
242 | info = framebuffer_alloc(16 * sizeof(u32), &z->dev); |
243 | if (!info) { |
244 | zorro_release_device(z); |
245 | return -ENOMEM; |
246 | } |
247 | |
248 | if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { |
249 | framebuffer_release(info); |
250 | zorro_release_device(z); |
251 | return -ENOMEM; |
252 | } |
253 | |
254 | /* assigning memory to kernel space */ |
255 | fb_fix.smem_start = zorro_resource_start(z); |
256 | info->screen_base = ioremap(fb_fix.smem_start, FRAMEMASTER_SIZE); |
257 | fb_fix.mmio_start = fb_fix.smem_start + FRAMEMASTER_REG; |
258 | fm2fb_reg = (unsigned char *)(info->screen_base+FRAMEMASTER_REG); |
259 | |
260 | strcpy(fb_fix.id, is_fm ? "FrameMaster II" : "Rainbow II"); |
261 | |
262 | /* make EBU color bars on display */ |
263 | ptr = (unsigned long *)fb_fix.smem_start; |
264 | for (y = 0; y < 576; y++) { |
265 | for (x = 0; x < 96; x++) *ptr++ = 0xffffff;/* white */ |
266 | for (x = 0; x < 96; x++) *ptr++ = 0xffff00;/* yellow */ |
267 | for (x = 0; x < 96; x++) *ptr++ = 0x00ffff;/* cyan */ |
268 | for (x = 0; x < 96; x++) *ptr++ = 0x00ff00;/* green */ |
269 | for (x = 0; x < 96; x++) *ptr++ = 0xff00ff;/* magenta */ |
270 | for (x = 0; x < 96; x++) *ptr++ = 0xff0000;/* red */ |
271 | for (x = 0; x < 96; x++) *ptr++ = 0x0000ff;/* blue */ |
272 | for (x = 0; x < 96; x++) *ptr++ = 0x000000;/* black */ |
273 | } |
274 | fm2fb_blank(0, info); |
275 | |
276 | if (fm2fb_mode == -1) |
277 | fm2fb_mode = FM2FB_MODE_PAL; |
278 | |
279 | info->fbops = &fm2fb_ops; |
280 | info->var = fb_var_modes[fm2fb_mode]; |
281 | info->pseudo_palette = info->par; |
282 | info->par = NULL; |
283 | info->fix = fb_fix; |
284 | info->flags = FBINFO_DEFAULT; |
285 | |
286 | if (register_framebuffer(info) < 0) { |
287 | fb_dealloc_cmap(&info->cmap); |
288 | iounmap(info->screen_base); |
289 | framebuffer_release(info); |
290 | zorro_release_device(z); |
291 | return -EINVAL; |
292 | } |
293 | printk("fb%d: %s frame buffer device\n", info->node, fb_fix.id); |
294 | return 0; |
295 | } |
296 | |
297 | int __init fm2fb_setup(char *options) |
298 | { |
299 | char *this_opt; |
300 | |
301 | if (!options || !*options) |
302 | return 0; |
303 | |
304 | while ((this_opt = strsep(&options, ",")) != NULL) { |
305 | if (!strncmp(this_opt, "pal", 3)) |
306 | fm2fb_mode = FM2FB_MODE_PAL; |
307 | else if (!strncmp(this_opt, "ntsc", 4)) |
308 | fm2fb_mode = FM2FB_MODE_NTSC; |
309 | } |
310 | return 0; |
311 | } |
312 | |
313 | int __init fm2fb_init(void) |
314 | { |
315 | char *option = NULL; |
316 | |
317 | if (fb_get_options("fm2fb", &option)) |
318 | return -ENODEV; |
319 | fm2fb_setup(option); |
320 | return zorro_register_driver(&fm2fb_driver); |
321 | } |
322 | |
323 | module_init(fm2fb_init); |
324 | MODULE_LICENSE("GPL"); |
325 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9