1 /*
2 * drivers/video/pnx4008/pnxrgbfb.c
3 *
4 * PNX4008's framebuffer support
5 *
6 * Author: Grigory Tolstolytkin <gtolstolytkin@ru.mvista.com>
7 * Based on Philips Semiconductors's code
8 *
9 * Copyrght (c) 2005 MontaVista Software, Inc.
10 * Copyright (c) 2005 Philips Semiconductors
11 * This file is licensed under the terms of the GNU General Public License
12 * version 2. This program is licensed "as is" without any warranty of any
13 * kind, whether express or implied.
14 */
15
16 #include <linux/module.h>
17 #include <linux/kernel.h>
18 #include <linux/errno.h>
19 #include <linux/string.h>
20 #include <linux/mm.h>
21 #include <linux/vmalloc.h>
22 #include <linux/delay.h>
23 #include <linux/interrupt.h>
24 #include <linux/fb.h>
25 #include <linux/init.h>
26 #include <linux/platform_device.h>
27
28 #include "sdum.h"
29 #include "fbcommon.h"
30
31 static u32 colreg[16];
32
33 static struct fb_var_screeninfo rgbfb_var __initdata = {
34 .xres = LCD_X_RES,
35 .yres = LCD_Y_RES,
36 .xres_virtual = LCD_X_RES,
37 .yres_virtual = LCD_Y_RES,
38 .bits_per_pixel = 32,
39 .red.offset = 16,
40 .red.length = 8,
41 .green.offset = 8,
42 .green.length = 8,
43 .blue.offset = 0,
44 .blue.length = 8,
45 .left_margin = 0,
46 .right_margin = 0,
47 .upper_margin = 0,
48 .lower_margin = 0,
49 .vmode = FB_VMODE_NONINTERLACED,
50 };
51 static struct fb_fix_screeninfo rgbfb_fix __initdata = {
52 .id = "RGBFB",
53 .line_length = LCD_X_RES * LCD_BBP,
54 .type = FB_TYPE_PACKED_PIXELS,
55 .visual = FB_VISUAL_TRUECOLOR,
56 .xpanstep = 0,
57 .ypanstep = 0,
58 .ywrapstep = 0,
59 .accel = FB_ACCEL_NONE,
60 };
61
62 static int channel_owned;
63
no_cursor(struct fb_info * info,struct fb_cursor * cursor)64 static int no_cursor(struct fb_info *info, struct fb_cursor *cursor)
65 {
66 return 0;
67 }
68
rgbfb_setcolreg(u_int regno,u_int red,u_int green,u_int blue,u_int transp,struct fb_info * info)69 static int rgbfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
70 u_int transp, struct fb_info *info)
71 {
72 if (regno > 15)
73 return 1;
74
75 colreg[regno] = ((red & 0xff00) << 8) | (green & 0xff00) |
76 ((blue & 0xff00) >> 8);
77 return 0;
78 }
79
rgbfb_mmap(struct fb_info * info,struct vm_area_struct * vma)80 static int rgbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
81 {
82 return pnx4008_sdum_mmap(info, vma, NULL);
83 }
84
85 static struct fb_ops rgbfb_ops = {
86 .fb_mmap = rgbfb_mmap,
87 .fb_setcolreg = rgbfb_setcolreg,
88 .fb_fillrect = cfb_fillrect,
89 .fb_copyarea = cfb_copyarea,
90 .fb_imageblit = cfb_imageblit,
91 };
92
rgbfb_remove(struct platform_device * pdev)93 static int rgbfb_remove(struct platform_device *pdev)
94 {
95 struct fb_info *info = platform_get_drvdata(pdev);
96
97 if (info) {
98 unregister_framebuffer(info);
99 fb_dealloc_cmap(&info->cmap);
100 framebuffer_release(info);
101 platform_set_drvdata(pdev, NULL);
102 }
103
104 pnx4008_free_dum_channel(channel_owned, pdev->id);
105 pnx4008_set_dum_exit_notification(pdev->id);
106
107 return 0;
108 }
109
rgbfb_probe(struct platform_device * pdev)110 static int __devinit rgbfb_probe(struct platform_device *pdev)
111 {
112 struct fb_info *info;
113 struct dumchannel_uf chan_uf;
114 int ret;
115 char *option;
116
117 info = framebuffer_alloc(sizeof(u32) * 16, &pdev->dev);
118 if (!info) {
119 ret = -ENOMEM;
120 goto err;
121 }
122
123 pnx4008_get_fb_addresses(FB_TYPE_RGB, (void **)&info->screen_base,
124 (dma_addr_t *) &rgbfb_fix.smem_start,
125 &rgbfb_fix.smem_len);
126
127 if ((ret = pnx4008_alloc_dum_channel(pdev->id)) < 0)
128 goto err0;
129 else {
130 channel_owned = ret;
131 chan_uf.channelnr = channel_owned;
132 chan_uf.dirty = (u32 *) NULL;
133 chan_uf.source = (u32 *) rgbfb_fix.smem_start;
134 chan_uf.x_offset = 0;
135 chan_uf.y_offset = 0;
136 chan_uf.width = LCD_X_RES;
137 chan_uf.height = LCD_Y_RES;
138
139 if ((ret = pnx4008_put_dum_channel_uf(chan_uf, pdev->id))< 0)
140 goto err1;
141
142 if ((ret =
143 pnx4008_set_dum_channel_sync(channel_owned, CONF_SYNC_ON,
144 pdev->id)) < 0)
145 goto err1;
146
147 if ((ret =
148 pnx4008_set_dum_channel_dirty_detect(channel_owned,
149 CONF_DIRTYDETECTION_ON,
150 pdev->id)) < 0)
151 goto err1;
152 }
153
154 if (!fb_get_options("pnxrgbfb", &option) && option &&
155 !strcmp(option, "nocursor"))
156 rgbfb_ops.fb_cursor = no_cursor;
157
158 info->node = -1;
159 info->flags = FBINFO_FLAG_DEFAULT;
160 info->fbops = &rgbfb_ops;
161 info->fix = rgbfb_fix;
162 info->var = rgbfb_var;
163 info->screen_size = rgbfb_fix.smem_len;
164 info->pseudo_palette = info->par;
165 info->par = NULL;
166
167 ret = fb_alloc_cmap(&info->cmap, 256, 0);
168 if (ret < 0)
169 goto err1;
170
171 ret = register_framebuffer(info);
172 if (ret < 0)
173 goto err2;
174 platform_set_drvdata(pdev, info);
175
176 return 0;
177
178 err2:
179 fb_dealloc_cmap(&info->cmap);
180 err1:
181 pnx4008_free_dum_channel(channel_owned, pdev->id);
182 err0:
183 framebuffer_release(info);
184 err:
185 return ret;
186 }
187
188 static struct platform_driver rgbfb_driver = {
189 .driver = {
190 .name = "pnx4008-rgbfb",
191 },
192 .probe = rgbfb_probe,
193 .remove = rgbfb_remove,
194 };
195
196 module_platform_driver(rgbfb_driver);
197
198 MODULE_LICENSE("GPL");
199