Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/video/geode/gx1fb_core.c | |
3 | * -- Geode GX1 framebuffer driver | |
4 | * | |
5 | * Copyright (C) 2005 Arcom Control Systems Ltd. | |
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 as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/string.h> | |
17 | #include <linux/mm.h> | |
18 | #include <linux/tty.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/fb.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/pci.h> | |
24 | ||
25 | #include "geodefb.h" | |
26 | #include "display_gx1.h" | |
27 | #include "video_cs5530.h" | |
28 | ||
29 | static char mode_option[32] = "640x480-16@60"; | |
30 | static int crt_option = 1; | |
31 | static char panel_option[32] = ""; | |
32 | ||
33 | static int gx1_line_delta(int xres, int bpp) | |
34 | { | |
35 | int line_delta = xres * (bpp >> 3); | |
36 | ||
37 | if (line_delta > 2048) | |
38 | line_delta = 4096; | |
39 | else if (line_delta > 1024) | |
40 | line_delta = 2048; | |
41 | else | |
42 | line_delta = 1024; | |
43 | return line_delta; | |
44 | } | |
45 | ||
46 | static int gx1fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
47 | { | |
48 | struct geodefb_par *par = info->par; | |
49 | ||
50 | printk(KERN_DEBUG "%s()\n", __FUNCTION__); | |
51 | ||
52 | /* Maximum resolution is 1280x1024. */ | |
53 | if (var->xres > 1280 || var->yres > 1024) | |
54 | return -EINVAL; | |
55 | ||
56 | if (par->panel_x && (var->xres > par->panel_x || var->yres > par->panel_y)) | |
57 | return -EINVAL; | |
58 | ||
59 | /* Only 16 bpp and 8 bpp is supported by the hardware. */ | |
60 | if (var->bits_per_pixel == 16) { | |
61 | var->red.offset = 11; var->red.length = 5; | |
62 | var->green.offset = 5; var->green.length = 6; | |
63 | var->blue.offset = 0; var->blue.length = 5; | |
64 | var->transp.offset = 0; var->transp.length = 0; | |
65 | } else if (var->bits_per_pixel == 8) { | |
66 | var->red.offset = 0; var->red.length = 8; | |
67 | var->green.offset = 0; var->green.length = 8; | |
68 | var->blue.offset = 0; var->blue.length = 8; | |
69 | var->transp.offset = 0; var->transp.length = 0; | |
70 | } else | |
71 | return -EINVAL; | |
72 | ||
73 | /* Enough video memory? */ | |
74 | if (gx1_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len) | |
75 | return -EINVAL; | |
76 | ||
77 | /* FIXME: Check timing parameters here? */ | |
78 | ||
79 | return 0; | |
80 | } | |
81 | ||
82 | static int gx1fb_set_par(struct fb_info *info) | |
83 | { | |
84 | struct geodefb_par *par = info->par; | |
85 | ||
86 | if (info->var.bits_per_pixel == 16) { | |
87 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
88 | fb_dealloc_cmap(&info->cmap); | |
89 | } else { | |
90 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; | |
91 | fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0); | |
92 | } | |
93 | ||
94 | info->fix.line_length = gx1_line_delta(info->var.xres, info->var.bits_per_pixel); | |
95 | ||
96 | par->dc_ops->set_mode(info); | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
101 | static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) | |
102 | { | |
103 | chan &= 0xffff; | |
104 | chan >>= 16 - bf->length; | |
105 | return chan << bf->offset; | |
106 | } | |
107 | ||
108 | static int gx1fb_setcolreg(unsigned regno, unsigned red, unsigned green, | |
109 | unsigned blue, unsigned transp, | |
110 | struct fb_info *info) | |
111 | { | |
112 | struct geodefb_par *par = info->par; | |
113 | ||
114 | if (info->var.grayscale) { | |
115 | /* grayscale = 0.30*R + 0.59*G + 0.11*B */ | |
116 | red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8; | |
117 | } | |
118 | ||
119 | /* Truecolor has hardware independent palette */ | |
120 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { | |
121 | u32 *pal = info->pseudo_palette; | |
122 | u32 v; | |
123 | ||
124 | if (regno >= 16) | |
125 | return -EINVAL; | |
126 | ||
127 | v = chan_to_field(red, &info->var.red); | |
128 | v |= chan_to_field(green, &info->var.green); | |
129 | v |= chan_to_field(blue, &info->var.blue); | |
130 | ||
131 | pal[regno] = v; | |
132 | } else { | |
133 | if (regno >= 256) | |
134 | return -EINVAL; | |
135 | ||
136 | par->dc_ops->set_palette_reg(info, regno, red, green, blue); | |
137 | } | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | static int gx1fb_blank(int blank_mode, struct fb_info *info) | |
143 | { | |
144 | struct geodefb_par *par = info->par; | |
145 | ||
146 | return par->vid_ops->blank_display(info, blank_mode); | |
147 | } | |
148 | ||
149 | static int __init gx1fb_map_video_memory(struct fb_info *info) | |
150 | { | |
151 | struct geodefb_par *par = info->par; | |
152 | unsigned gx_base; | |
153 | int fb_len; | |
154 | ||
155 | gx_base = gx1_gx_base(); | |
156 | if (!gx_base) | |
157 | return -ENODEV; | |
158 | ||
159 | par->vid_dev = pci_get_device(PCI_VENDOR_ID_CYRIX, | |
160 | PCI_DEVICE_ID_CYRIX_5530_VIDEO, NULL); | |
161 | if (!par->vid_dev) | |
162 | return -ENODEV; | |
163 | ||
164 | par->vid_regs = ioremap(pci_resource_start(par->vid_dev, 1), | |
165 | pci_resource_len(par->vid_dev, 1)); | |
166 | if (!par->vid_regs) | |
167 | return -ENOMEM; | |
168 | ||
169 | par->dc_regs = ioremap(gx_base + 0x8300, 0x100); | |
170 | if (!par->dc_regs) | |
171 | return -ENOMEM; | |
172 | ||
173 | info->fix.smem_start = gx_base + 0x800000; | |
174 | if ((fb_len = gx1_frame_buffer_size()) < 0) | |
175 | return -ENOMEM; | |
176 | info->fix.smem_len = fb_len; | |
177 | info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); | |
178 | if (!info->screen_base) | |
179 | return -ENOMEM; | |
180 | ||
181 | printk(KERN_INFO "%s: %d Kibyte of video memory at 0x%lx\n", | |
182 | info->fix.id, info->fix.smem_len / 1024, info->fix.smem_start); | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | static int parse_panel_option(struct fb_info *info) | |
188 | { | |
189 | struct geodefb_par *par = info->par; | |
190 | ||
191 | if (strcmp(panel_option, "") != 0) { | |
192 | int x, y; | |
193 | char *s; | |
194 | x = simple_strtol(panel_option, &s, 10); | |
195 | if (!x) | |
196 | return -EINVAL; | |
197 | y = simple_strtol(s + 1, NULL, 10); | |
198 | if (!y) | |
199 | return -EINVAL; | |
200 | par->panel_x = x; | |
201 | par->panel_y = y; | |
202 | } | |
203 | return 0; | |
204 | } | |
205 | ||
206 | static struct fb_ops gx1fb_ops = { | |
207 | .owner = THIS_MODULE, | |
208 | .fb_check_var = gx1fb_check_var, | |
209 | .fb_set_par = gx1fb_set_par, | |
210 | .fb_setcolreg = gx1fb_setcolreg, | |
211 | .fb_blank = gx1fb_blank, | |
212 | /* No HW acceleration for now. */ | |
213 | .fb_fillrect = cfb_fillrect, | |
214 | .fb_copyarea = cfb_copyarea, | |
215 | .fb_imageblit = cfb_imageblit, | |
216 | .fb_cursor = soft_cursor, | |
217 | }; | |
218 | ||
219 | static struct fb_info * __init gx1fb_init_fbinfo(void) | |
220 | { | |
221 | struct fb_info *info; | |
222 | struct geodefb_par *par; | |
223 | ||
224 | /* Alloc enough space for the pseudo palette. */ | |
225 | info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, NULL); | |
226 | if (!info) | |
227 | return NULL; | |
228 | ||
229 | par = info->par; | |
230 | ||
231 | strcpy(info->fix.id, "GX1"); | |
232 | ||
233 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
234 | info->fix.type_aux = 0; | |
235 | info->fix.xpanstep = 0; | |
236 | info->fix.ypanstep = 0; | |
237 | info->fix.ywrapstep = 0; | |
238 | info->fix.accel = FB_ACCEL_NONE; | |
239 | ||
240 | info->var.nonstd = 0; | |
241 | info->var.activate = FB_ACTIVATE_NOW; | |
242 | info->var.height = -1; | |
243 | info->var.width = -1; | |
244 | info->var.accel_flags = 0; | |
245 | info->var.vmode = FB_VMODE_NONINTERLACED; | |
246 | ||
247 | info->fbops = &gx1fb_ops; | |
248 | info->flags = FBINFO_DEFAULT; | |
249 | info->node = -1; | |
250 | ||
251 | info->pseudo_palette = (void *)par + sizeof(struct geodefb_par); | |
252 | ||
253 | info->var.grayscale = 0; | |
254 | ||
255 | /* CRT and panel options */ | |
256 | par->enable_crt = crt_option; | |
257 | if (parse_panel_option(info) < 0) | |
258 | printk(KERN_WARNING "%s: invalid 'panel' option -- disabling flat panel\n", | |
259 | info->fix.id); | |
260 | if (!par->panel_x) | |
261 | par->enable_crt = 1; /* fall back to CRT if no panel is specified */ | |
262 | ||
263 | return info; | |
264 | } | |
265 | ||
266 | ||
267 | static struct fb_info *gx1fb_info; | |
268 | ||
269 | static int __init gx1fb_init(void) | |
270 | { | |
271 | struct fb_info *info; | |
272 | struct geodefb_par *par; | |
273 | int ret; | |
274 | ||
275 | #ifndef MODULE | |
276 | if (fb_get_options("gx1fb", NULL)) | |
277 | return -ENODEV; | |
278 | #endif | |
279 | ||
280 | info = gx1fb_init_fbinfo(); | |
281 | if (!info) | |
282 | return -ENOMEM; | |
283 | gx1fb_info = info; | |
284 | ||
285 | par = info->par; | |
286 | ||
287 | /* GX1 display controller and CS5530 video device */ | |
288 | par->dc_ops = &gx1_dc_ops; | |
289 | par->vid_ops = &cs5530_vid_ops; | |
290 | ||
291 | if ((ret = gx1fb_map_video_memory(info)) < 0) { | |
292 | printk(KERN_ERR "%s: gx1fb_map_video_memory() failed\n", info->fix.id); | |
293 | goto err; | |
294 | } | |
295 | ||
296 | ret = fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 16); | |
297 | if (ret == 0 || ret == 4) { | |
298 | printk(KERN_ERR "%s: could not find valid video mode\n", info->fix.id); | |
299 | ret = -EINVAL; | |
300 | goto err; | |
301 | } | |
302 | ||
303 | /* Clear the frame buffer of garbage. */ | |
304 | memset_io(info->screen_base, 0, info->fix.smem_len); | |
305 | ||
306 | gx1fb_check_var(&info->var, info); | |
307 | gx1fb_set_par(info); | |
308 | ||
309 | if (register_framebuffer(info) < 0) { | |
310 | ret = -EINVAL; | |
311 | goto err; | |
312 | } | |
313 | printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id); | |
314 | return 0; | |
315 | ||
316 | err: | |
317 | if (info->screen_base) | |
318 | iounmap(info->screen_base); | |
319 | if (par->vid_regs) | |
320 | iounmap(par->vid_regs); | |
321 | if (par->dc_regs) | |
322 | iounmap(par->dc_regs); | |
323 | if (par->vid_dev) | |
324 | pci_dev_put(par->vid_dev); | |
325 | if (info) | |
326 | framebuffer_release(info); | |
327 | return ret; | |
328 | } | |
329 | ||
330 | static void __exit gx1fb_cleanup(void) | |
331 | { | |
332 | struct fb_info *info = gx1fb_info; | |
333 | struct geodefb_par *par = gx1fb_info->par; | |
334 | ||
335 | unregister_framebuffer(info); | |
336 | ||
337 | iounmap((void __iomem *)info->screen_base); | |
338 | iounmap(par->vid_regs); | |
339 | iounmap(par->dc_regs); | |
340 | ||
341 | pci_dev_put(par->vid_dev); | |
342 | ||
343 | framebuffer_release(info); | |
344 | } | |
345 | ||
346 | module_init(gx1fb_init); | |
347 | module_exit(gx1fb_cleanup); | |
348 | ||
349 | module_param_string(mode, mode_option, sizeof(mode_option), 0444); | |
350 | MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])"); | |
351 | ||
352 | module_param_named(crt, crt_option, int, 0444); | |
353 | MODULE_PARM_DESC(crt, "enable CRT output. 0 = off, 1 = on (default)"); | |
354 | ||
355 | module_param_string(panel, panel_option, sizeof(panel_option), 0444); | |
356 | MODULE_PARM_DESC(panel, "size of attached flat panel (<x>x<y>)"); | |
357 | ||
358 | MODULE_DESCRIPTION("framebuffer driver for the AMD Geode GX1"); | |
359 | MODULE_LICENSE("GPL"); |