75a30842 |
1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2009,2013 |
3 | * |
4 | * This work is licensed under the terms of any of these licenses |
5 | * (at your option): |
6 | * - GNU GPL, version 2 or later. |
7 | * - GNU LGPL, version 2.1 or later. |
8 | * - MAME license. |
9 | * See the COPYING file in the top-level directory. |
10 | * |
11 | * <random_info=mem_map> |
12 | * 00000000-029fffff linux (42MB) |
13 | * 02a00000-02dfffff fb (4MB, 153600B really used) |
14 | * 02e00000-02ffffff sound dma (2MB) |
15 | * 03000000-03ffffff MPEGDEC (?, 16MB) |
16 | * </random_info> |
17 | */ |
18 | |
19 | #include <stdio.h> |
20 | #include <stdlib.h> |
21 | #include <string.h> |
22 | #include <sys/types.h> |
23 | #include <sys/stat.h> |
24 | #include <fcntl.h> |
25 | #include <sys/ioctl.h> |
26 | #include <sys/mman.h> |
27 | #include <linux/fb.h> |
28 | #include <unistd.h> |
29 | |
30 | #include "../libpicofe/gp2x/soc.h" |
31 | #include "../libpicofe/gp2x/plat_gp2x.h" |
32 | #include "../libpicofe/gp2x/pollux_set.h" |
33 | #include "../common/emu.h" |
34 | #include "../common/arm_utils.h" |
35 | #include "plat.h" |
36 | |
37 | #define fb_buf_count 4 |
38 | static unsigned int fb_paddr[fb_buf_count]; |
39 | static int fb_work_buf; |
40 | static int fbdev = -1; |
41 | |
42 | static unsigned short memtimex_old[2]; |
43 | static int last_pal_setting = 0; |
44 | |
45 | |
46 | /* misc */ |
47 | static void pollux_set_fromenv(const char *env_var) |
48 | { |
49 | const char *set_string; |
50 | set_string = getenv(env_var); |
51 | if (set_string) |
52 | pollux_set(memregs, set_string); |
53 | else |
54 | printf("env var %s not defined.\n", env_var); |
55 | } |
56 | |
57 | /* video stuff */ |
58 | static void pollux_video_flip(int buf_count) |
59 | { |
60 | memregl[0x406C>>2] = fb_paddr[fb_work_buf]; |
61 | memregl[0x4058>>2] |= 0x10; |
62 | fb_work_buf++; |
63 | if (fb_work_buf >= buf_count) |
64 | fb_work_buf = 0; |
65 | g_screen_ptr = gp2x_screens[fb_work_buf]; |
66 | } |
67 | |
68 | static void gp2x_video_flip_(void) |
69 | { |
70 | pollux_video_flip(fb_buf_count); |
71 | } |
72 | |
73 | /* doulblebuffered flip */ |
74 | static void gp2x_video_flip2_(void) |
75 | { |
76 | pollux_video_flip(2); |
77 | } |
78 | |
79 | static void gp2x_video_changemode_ll_(int bpp) |
80 | { |
81 | static int prev_bpp = 0; |
82 | int code = 0, bytes = 2; |
83 | int rot_cmd[2] = { 0, 0 }; |
84 | unsigned int r; |
85 | char buff[32]; |
86 | int ret; |
87 | |
88 | if (bpp == prev_bpp) |
89 | return; |
90 | prev_bpp = bpp; |
91 | |
92 | printf("changemode: %dbpp rot=%d\n", abs(bpp), bpp < 0); |
93 | |
94 | /* negative bpp means rotated mode */ |
95 | rot_cmd[0] = (bpp < 0) ? 6 : 5; |
96 | ret = ioctl(fbdev, _IOW('D', 90, int[2]), rot_cmd); |
97 | if (ret < 0) |
98 | perror("rot ioctl failed"); |
99 | memregl[0x4004>>2] = (bpp < 0) ? 0x013f00ef : 0x00ef013f; |
100 | memregl[0x4000>>2] |= 1 << 3; |
101 | |
102 | /* the above ioctl resets LCD timings, so set them here */ |
103 | snprintf(buff, sizeof(buff), "POLLUX_LCD_TIMINGS_%s", last_pal_setting ? "PAL" : "NTSC"); |
104 | pollux_set_fromenv(buff); |
105 | |
106 | switch (abs(bpp)) |
107 | { |
108 | case 8: |
109 | code = 0x443a; |
110 | bytes = 1; |
111 | break; |
112 | |
113 | case 15: |
114 | case 16: |
115 | code = 0x4432; |
116 | bytes = 2; |
117 | break; |
118 | |
119 | default: |
120 | printf("unhandled bpp request: %d\n", abs(bpp)); |
121 | return; |
122 | } |
123 | |
124 | memregl[0x405c>>2] = bytes; |
125 | memregl[0x4060>>2] = bytes * (bpp < 0 ? 240 : 320); |
126 | |
127 | r = memregl[0x4058>>2]; |
128 | r = (r & 0xffff) | (code << 16) | 0x10; |
129 | memregl[0x4058>>2] = r; |
130 | } |
131 | |
132 | static void gp2x_video_setpalette_(int *pal, int len) |
133 | { |
134 | /* pollux palette is 16bpp only.. */ |
135 | int i; |
136 | for (i = 0; i < len; i++) |
137 | { |
138 | int c = pal[i]; |
139 | c = ((c >> 8) & 0xf800) | ((c >> 5) & 0x07c0) | ((c >> 3) & 0x001f); |
140 | memregl[0x4070>>2] = (i << 24) | c; |
141 | } |
142 | } |
143 | |
144 | static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H) |
145 | { |
146 | /* maybe a job for 3d hardware? */ |
147 | } |
148 | |
149 | static void gp2x_video_wait_vsync_(void) |
150 | { |
151 | while (!(memregl[0x308c>>2] & (1 << 10))) |
152 | spend_cycles(128); |
153 | memregl[0x308c>>2] |= 1 << 10; |
154 | } |
155 | |
156 | /* RAM timings */ |
157 | static void set_ram_timings_(void) |
158 | { |
159 | pollux_set_fromenv("POLLUX_RAM_TIMINGS"); |
160 | } |
161 | |
162 | static void unset_ram_timings_(void) |
163 | { |
164 | int i; |
165 | |
166 | memregs[0x14802>>1] = memtimex_old[0]; |
167 | memregs[0x14804>>1] = memtimex_old[1] | 0x8000; |
168 | |
169 | for (i = 0; i < 0x100000; i++) |
170 | if (!(memregs[0x14804>>1] & 0x8000)) |
171 | break; |
172 | |
173 | printf("RAM timings reset to startup values.\n"); |
174 | } |
175 | |
176 | void vid_pollux_init(void) |
177 | { |
178 | struct fb_fix_screeninfo fbfix; |
179 | int i, ret; |
180 | |
181 | fbdev = open("/dev/fb0", O_RDWR); |
182 | if (fbdev < 0) { |
183 | perror("can't open fbdev"); |
184 | exit(1); |
185 | } |
186 | |
187 | ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix); |
188 | if (ret == -1) { |
189 | perror("ioctl(fbdev) failed"); |
190 | exit(1); |
191 | } |
192 | |
193 | printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start); |
194 | fb_paddr[0] = fbfix.smem_start; |
195 | |
196 | gp2x_screens[0] = mmap(0, 320*240*2*fb_buf_count, PROT_READ|PROT_WRITE, |
197 | MAP_SHARED, memdev, fb_paddr[0]); |
198 | if (gp2x_screens[0] == MAP_FAILED) |
199 | { |
200 | perror("mmap(gp2x_screens) failed"); |
201 | exit(1); |
202 | } |
203 | memset(gp2x_screens[0], 0, 320*240*2*fb_buf_count); |
204 | |
205 | printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]); |
206 | for (i = 1; i < fb_buf_count; i++) |
207 | { |
208 | fb_paddr[i] = fb_paddr[i-1] + 320*240*2; |
209 | gp2x_screens[i] = (char *)gp2x_screens[i-1] + 320*240*2; |
210 | printf(" %p -> %08x\n", gp2x_screens[i], fb_paddr[i]); |
211 | } |
212 | fb_work_buf = 0; |
213 | g_screen_ptr = gp2x_screens[0]; |
214 | |
215 | set_ram_timings_(); |
216 | |
217 | gp2x_video_flip = gp2x_video_flip_; |
218 | gp2x_video_flip2 = gp2x_video_flip2_; |
219 | gp2x_video_changemode_ll = gp2x_video_changemode_ll_; |
220 | gp2x_video_setpalette = gp2x_video_setpalette_; |
221 | gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_; |
222 | gp2x_video_wait_vsync = gp2x_video_wait_vsync_; |
223 | } |
224 | |
225 | void vid_pollux_finish(void) |
226 | { |
227 | munmap(gp2x_screens[0], 320*240*2 * fb_buf_count); |
228 | close(fbdev); |
229 | fbdev = -1; |
230 | |
231 | unset_ram_timings_(); |
232 | } |