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2d378b91 DM |
1 | /* sunxvr1000.c: Sun XVR-1000 driver for sparc64 systems |
2 | * | |
3 | * Copyright (C) 2010 David S. Miller (davem@davemloft.net) | |
4 | */ | |
5 | ||
6 | #include <linux/module.h> | |
7 | #include <linux/kernel.h> | |
8 | #include <linux/slab.h> | |
9 | #include <linux/fb.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/of_device.h> | |
12 | ||
13 | struct gfb_info { | |
14 | struct fb_info *info; | |
15 | ||
16 | char __iomem *fb_base; | |
17 | unsigned long fb_base_phys; | |
18 | ||
19 | struct device_node *of_node; | |
20 | ||
21 | unsigned int width; | |
22 | unsigned int height; | |
23 | unsigned int depth; | |
24 | unsigned int fb_size; | |
25 | ||
26 | u32 pseudo_palette[16]; | |
27 | }; | |
28 | ||
29 | static int __devinit gfb_get_props(struct gfb_info *gp) | |
30 | { | |
31 | gp->width = of_getintprop_default(gp->of_node, "width", 0); | |
32 | gp->height = of_getintprop_default(gp->of_node, "height", 0); | |
33 | gp->depth = of_getintprop_default(gp->of_node, "depth", 32); | |
34 | ||
35 | if (!gp->width || !gp->height) { | |
36 | printk(KERN_ERR "gfb: Critical properties missing for %s\n", | |
37 | gp->of_node->full_name); | |
38 | return -EINVAL; | |
39 | } | |
40 | ||
41 | return 0; | |
42 | } | |
43 | ||
44 | static int gfb_setcolreg(unsigned regno, | |
45 | unsigned red, unsigned green, unsigned blue, | |
46 | unsigned transp, struct fb_info *info) | |
47 | { | |
48 | u32 value; | |
49 | ||
50 | if (regno < 16) { | |
51 | red >>= 8; | |
52 | green >>= 8; | |
53 | blue >>= 8; | |
54 | ||
55 | value = (blue << 16) | (green << 8) | red; | |
56 | ((u32 *)info->pseudo_palette)[regno] = value; | |
57 | } | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
62 | static struct fb_ops gfb_ops = { | |
63 | .owner = THIS_MODULE, | |
64 | .fb_setcolreg = gfb_setcolreg, | |
65 | .fb_fillrect = cfb_fillrect, | |
66 | .fb_copyarea = cfb_copyarea, | |
67 | .fb_imageblit = cfb_imageblit, | |
68 | }; | |
69 | ||
70 | static int __devinit gfb_set_fbinfo(struct gfb_info *gp) | |
71 | { | |
72 | struct fb_info *info = gp->info; | |
73 | struct fb_var_screeninfo *var = &info->var; | |
74 | ||
75 | info->flags = FBINFO_DEFAULT; | |
76 | info->fbops = &gfb_ops; | |
77 | info->screen_base = gp->fb_base; | |
78 | info->screen_size = gp->fb_size; | |
79 | ||
80 | info->pseudo_palette = gp->pseudo_palette; | |
81 | ||
82 | /* Fill fix common fields */ | |
83 | strlcpy(info->fix.id, "gfb", sizeof(info->fix.id)); | |
84 | info->fix.smem_start = gp->fb_base_phys; | |
85 | info->fix.smem_len = gp->fb_size; | |
86 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
87 | if (gp->depth == 32 || gp->depth == 24) | |
88 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
89 | else | |
90 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; | |
91 | ||
92 | var->xres = gp->width; | |
93 | var->yres = gp->height; | |
94 | var->xres_virtual = var->xres; | |
95 | var->yres_virtual = var->yres; | |
96 | var->bits_per_pixel = gp->depth; | |
97 | ||
98 | var->red.offset = 0; | |
99 | var->red.length = 8; | |
100 | var->green.offset = 8; | |
101 | var->green.length = 8; | |
102 | var->blue.offset = 16; | |
103 | var->blue.length = 8; | |
104 | var->transp.offset = 0; | |
105 | var->transp.length = 0; | |
106 | ||
107 | if (fb_alloc_cmap(&info->cmap, 256, 0)) { | |
108 | printk(KERN_ERR "gfb: Cannot allocate color map.\n"); | |
109 | return -ENOMEM; | |
110 | } | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | static int __devinit gfb_probe(struct of_device *op, | |
116 | const struct of_device_id *match) | |
117 | { | |
118 | struct device_node *dp = op->node; | |
119 | struct fb_info *info; | |
120 | struct gfb_info *gp; | |
121 | int err; | |
122 | ||
123 | info = framebuffer_alloc(sizeof(struct gfb_info), &op->dev); | |
124 | if (!info) { | |
125 | printk(KERN_ERR "gfb: Cannot allocate fb_info\n"); | |
126 | err = -ENOMEM; | |
127 | goto err_out; | |
128 | } | |
129 | ||
130 | gp = info->par; | |
131 | gp->info = info; | |
132 | gp->of_node = dp; | |
133 | ||
134 | gp->fb_base_phys = op->resource[6].start; | |
135 | ||
136 | err = gfb_get_props(gp); | |
137 | if (err) | |
138 | goto err_release_fb; | |
139 | ||
140 | /* Framebuffer length is the same regardless of resolution. */ | |
141 | info->fix.line_length = 16384; | |
142 | gp->fb_size = info->fix.line_length * gp->height; | |
143 | ||
144 | gp->fb_base = of_ioremap(&op->resource[6], 0, | |
145 | gp->fb_size, "gfb fb"); | |
146 | if (!gp->fb_base) | |
147 | goto err_release_fb; | |
148 | ||
149 | err = gfb_set_fbinfo(gp); | |
150 | if (err) | |
151 | goto err_unmap_fb; | |
152 | ||
153 | printk("gfb: Found device at %s\n", dp->full_name); | |
154 | ||
155 | err = register_framebuffer(info); | |
156 | if (err < 0) { | |
157 | printk(KERN_ERR "gfb: Could not register framebuffer %s\n", | |
158 | dp->full_name); | |
159 | goto err_unmap_fb; | |
160 | } | |
161 | ||
162 | dev_set_drvdata(&op->dev, info); | |
163 | ||
164 | return 0; | |
165 | ||
166 | err_unmap_fb: | |
167 | of_iounmap(&op->resource[6], gp->fb_base, gp->fb_size); | |
168 | ||
169 | err_release_fb: | |
170 | framebuffer_release(info); | |
171 | ||
172 | err_out: | |
173 | return err; | |
174 | } | |
175 | ||
176 | static int __devexit gfb_remove(struct of_device *op) | |
177 | { | |
178 | struct fb_info *info = dev_get_drvdata(&op->dev); | |
179 | struct gfb_info *gp = info->par; | |
180 | ||
181 | unregister_framebuffer(info); | |
182 | ||
183 | iounmap(gp->fb_base); | |
184 | ||
185 | of_iounmap(&op->resource[6], gp->fb_base, gp->fb_size); | |
186 | ||
187 | framebuffer_release(info); | |
188 | ||
189 | dev_set_drvdata(&op->dev, NULL); | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
194 | static const struct of_device_id gfb_match[] = { | |
195 | { | |
196 | .name = "SUNW,gfb", | |
197 | }, | |
198 | {}, | |
199 | }; | |
200 | MODULE_DEVICE_TABLE(of, ffb_match); | |
201 | ||
202 | static struct of_platform_driver gfb_driver = { | |
203 | .name = "gfb", | |
204 | .match_table = gfb_match, | |
205 | .probe = gfb_probe, | |
206 | .remove = __devexit_p(gfb_remove), | |
207 | }; | |
208 | ||
209 | static int __init gfb_init(void) | |
210 | { | |
211 | if (fb_get_options("gfb", NULL)) | |
212 | return -ENODEV; | |
213 | ||
214 | return of_register_driver(&gfb_driver, &of_bus_type); | |
215 | } | |
216 | ||
217 | static void __exit gfb_exit(void) | |
218 | { | |
219 | of_unregister_driver(&gfb_driver); | |
220 | } | |
221 | ||
222 | module_init(gfb_init); | |
223 | module_exit(gfb_exit); | |
224 | ||
225 | MODULE_DESCRIPTION("framebuffer driver for Sun XVR-1000 graphics"); | |
226 | MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); | |
227 | MODULE_VERSION("1.0"); | |
228 | MODULE_LICENSE("GPL"); |