This source file includes following definitions.
- apollo_send_data
- apollo_send_command
- hecubafb_dpy_update
- hecubafb_dpy_deferred_io
- hecubafb_fillrect
- hecubafb_copyarea
- hecubafb_imageblit
- hecubafb_write
- hecubafb_probe
- hecubafb_remove
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30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/errno.h>
33 #include <linux/string.h>
34 #include <linux/mm.h>
35 #include <linux/vmalloc.h>
36 #include <linux/delay.h>
37 #include <linux/interrupt.h>
38 #include <linux/fb.h>
39 #include <linux/init.h>
40 #include <linux/platform_device.h>
41 #include <linux/list.h>
42 #include <linux/uaccess.h>
43
44 #include <video/hecubafb.h>
45
46
47 #define DPY_W 600
48 #define DPY_H 800
49
50 static const struct fb_fix_screeninfo hecubafb_fix = {
51 .id = "hecubafb",
52 .type = FB_TYPE_PACKED_PIXELS,
53 .visual = FB_VISUAL_MONO01,
54 .xpanstep = 0,
55 .ypanstep = 0,
56 .ywrapstep = 0,
57 .line_length = DPY_W,
58 .accel = FB_ACCEL_NONE,
59 };
60
61 static const struct fb_var_screeninfo hecubafb_var = {
62 .xres = DPY_W,
63 .yres = DPY_H,
64 .xres_virtual = DPY_W,
65 .yres_virtual = DPY_H,
66 .bits_per_pixel = 1,
67 .nonstd = 1,
68 };
69
70
71
72 static void apollo_send_data(struct hecubafb_par *par, unsigned char data)
73 {
74
75 par->board->set_data(par, data);
76
77
78 par->board->set_ctl(par, HCB_DS_BIT, 0);
79
80
81 par->board->wait_for_ack(par, 0);
82
83
84 par->board->set_ctl(par, HCB_DS_BIT, 1);
85
86
87 par->board->wait_for_ack(par, 1);
88 }
89
90 static void apollo_send_command(struct hecubafb_par *par, unsigned char data)
91 {
92
93 par->board->set_ctl(par, HCB_CD_BIT, 1);
94
95
96 apollo_send_data(par, data);
97
98
99 par->board->set_ctl(par, HCB_CD_BIT, 0);
100 }
101
102 static void hecubafb_dpy_update(struct hecubafb_par *par)
103 {
104 int i;
105 unsigned char *buf = (unsigned char __force *)par->info->screen_base;
106
107 apollo_send_command(par, APOLLO_START_NEW_IMG);
108
109 for (i=0; i < (DPY_W*DPY_H/8); i++) {
110 apollo_send_data(par, *(buf++));
111 }
112
113 apollo_send_command(par, APOLLO_STOP_IMG_DATA);
114 apollo_send_command(par, APOLLO_DISPLAY_IMG);
115 }
116
117
118 static void hecubafb_dpy_deferred_io(struct fb_info *info,
119 struct list_head *pagelist)
120 {
121 hecubafb_dpy_update(info->par);
122 }
123
124 static void hecubafb_fillrect(struct fb_info *info,
125 const struct fb_fillrect *rect)
126 {
127 struct hecubafb_par *par = info->par;
128
129 sys_fillrect(info, rect);
130
131 hecubafb_dpy_update(par);
132 }
133
134 static void hecubafb_copyarea(struct fb_info *info,
135 const struct fb_copyarea *area)
136 {
137 struct hecubafb_par *par = info->par;
138
139 sys_copyarea(info, area);
140
141 hecubafb_dpy_update(par);
142 }
143
144 static void hecubafb_imageblit(struct fb_info *info,
145 const struct fb_image *image)
146 {
147 struct hecubafb_par *par = info->par;
148
149 sys_imageblit(info, image);
150
151 hecubafb_dpy_update(par);
152 }
153
154
155
156
157
158 static ssize_t hecubafb_write(struct fb_info *info, const char __user *buf,
159 size_t count, loff_t *ppos)
160 {
161 struct hecubafb_par *par = info->par;
162 unsigned long p = *ppos;
163 void *dst;
164 int err = 0;
165 unsigned long total_size;
166
167 if (info->state != FBINFO_STATE_RUNNING)
168 return -EPERM;
169
170 total_size = info->fix.smem_len;
171
172 if (p > total_size)
173 return -EFBIG;
174
175 if (count > total_size) {
176 err = -EFBIG;
177 count = total_size;
178 }
179
180 if (count + p > total_size) {
181 if (!err)
182 err = -ENOSPC;
183
184 count = total_size - p;
185 }
186
187 dst = (void __force *) (info->screen_base + p);
188
189 if (copy_from_user(dst, buf, count))
190 err = -EFAULT;
191
192 if (!err)
193 *ppos += count;
194
195 hecubafb_dpy_update(par);
196
197 return (err) ? err : count;
198 }
199
200 static struct fb_ops hecubafb_ops = {
201 .owner = THIS_MODULE,
202 .fb_read = fb_sys_read,
203 .fb_write = hecubafb_write,
204 .fb_fillrect = hecubafb_fillrect,
205 .fb_copyarea = hecubafb_copyarea,
206 .fb_imageblit = hecubafb_imageblit,
207 };
208
209 static struct fb_deferred_io hecubafb_defio = {
210 .delay = HZ,
211 .deferred_io = hecubafb_dpy_deferred_io,
212 };
213
214 static int hecubafb_probe(struct platform_device *dev)
215 {
216 struct fb_info *info;
217 struct hecuba_board *board;
218 int retval = -ENOMEM;
219 int videomemorysize;
220 unsigned char *videomemory;
221 struct hecubafb_par *par;
222
223
224 board = dev->dev.platform_data;
225 if (!board)
226 return -EINVAL;
227
228
229 if (!try_module_get(board->owner))
230 return -ENODEV;
231
232 videomemorysize = (DPY_W*DPY_H)/8;
233
234 videomemory = vzalloc(videomemorysize);
235 if (!videomemory)
236 goto err_videomem_alloc;
237
238 info = framebuffer_alloc(sizeof(struct hecubafb_par), &dev->dev);
239 if (!info)
240 goto err_fballoc;
241
242 info->screen_base = (char __force __iomem *)videomemory;
243 info->fbops = &hecubafb_ops;
244
245 info->var = hecubafb_var;
246 info->fix = hecubafb_fix;
247 info->fix.smem_len = videomemorysize;
248 par = info->par;
249 par->info = info;
250 par->board = board;
251 par->send_command = apollo_send_command;
252 par->send_data = apollo_send_data;
253
254 info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB;
255
256 info->fbdefio = &hecubafb_defio;
257 fb_deferred_io_init(info);
258
259 retval = register_framebuffer(info);
260 if (retval < 0)
261 goto err_fbreg;
262 platform_set_drvdata(dev, info);
263
264 fb_info(info, "Hecuba frame buffer device, using %dK of video memory\n",
265 videomemorysize >> 10);
266
267
268 retval = par->board->init(par);
269 if (retval < 0)
270 goto err_fbreg;
271
272 return 0;
273 err_fbreg:
274 framebuffer_release(info);
275 err_fballoc:
276 vfree(videomemory);
277 err_videomem_alloc:
278 module_put(board->owner);
279 return retval;
280 }
281
282 static int hecubafb_remove(struct platform_device *dev)
283 {
284 struct fb_info *info = platform_get_drvdata(dev);
285
286 if (info) {
287 struct hecubafb_par *par = info->par;
288 fb_deferred_io_cleanup(info);
289 unregister_framebuffer(info);
290 vfree((void __force *)info->screen_base);
291 if (par->board->remove)
292 par->board->remove(par);
293 module_put(par->board->owner);
294 framebuffer_release(info);
295 }
296 return 0;
297 }
298
299 static struct platform_driver hecubafb_driver = {
300 .probe = hecubafb_probe,
301 .remove = hecubafb_remove,
302 .driver = {
303 .name = "hecubafb",
304 },
305 };
306 module_platform_driver(hecubafb_driver);
307
308 MODULE_DESCRIPTION("fbdev driver for Hecuba/Apollo controller");
309 MODULE_AUTHOR("Jaya Kumar");
310 MODULE_LICENSE("GPL");