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27844cb8 PG |
1 | /* sunxvr1000.c: Sun XVR-1000 fb driver for sparc64 systems |
2 | * | |
3 | * License: GPL | |
2d378b91 DM |
4 | * |
5 | * Copyright (C) 2010 David S. Miller (davem@davemloft.net) | |
6 | */ | |
7 | ||
2d378b91 | 8 | #include <linux/kernel.h> |
2d378b91 DM |
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 | ||
48c68c4f | 29 | static int gfb_get_props(struct gfb_info *gp) |
2d378b91 DM |
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 | ||
48c68c4f | 70 | static int gfb_set_fbinfo(struct gfb_info *gp) |
2d378b91 DM |
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 | ||
48c68c4f | 115 | static int gfb_probe(struct platform_device *op) |
2d378b91 | 116 | { |
61c7a080 | 117 | struct device_node *dp = op->dev.of_node; |
2d378b91 DM |
118 | struct fb_info *info; |
119 | struct gfb_info *gp; | |
120 | int err; | |
121 | ||
122 | info = framebuffer_alloc(sizeof(struct gfb_info), &op->dev); | |
123 | if (!info) { | |
124 | printk(KERN_ERR "gfb: Cannot allocate fb_info\n"); | |
125 | err = -ENOMEM; | |
126 | goto err_out; | |
127 | } | |
128 | ||
129 | gp = info->par; | |
130 | gp->info = info; | |
131 | gp->of_node = dp; | |
132 | ||
133 | gp->fb_base_phys = op->resource[6].start; | |
134 | ||
135 | err = gfb_get_props(gp); | |
136 | if (err) | |
137 | goto err_release_fb; | |
138 | ||
139 | /* Framebuffer length is the same regardless of resolution. */ | |
140 | info->fix.line_length = 16384; | |
141 | gp->fb_size = info->fix.line_length * gp->height; | |
142 | ||
143 | gp->fb_base = of_ioremap(&op->resource[6], 0, | |
144 | gp->fb_size, "gfb fb"); | |
6a1e5f85 PST |
145 | if (!gp->fb_base) { |
146 | err = -ENOMEM; | |
2d378b91 | 147 | goto err_release_fb; |
6a1e5f85 | 148 | } |
2d378b91 DM |
149 | |
150 | err = gfb_set_fbinfo(gp); | |
151 | if (err) | |
152 | goto err_unmap_fb; | |
153 | ||
154 | printk("gfb: Found device at %s\n", dp->full_name); | |
155 | ||
156 | err = register_framebuffer(info); | |
157 | if (err < 0) { | |
158 | printk(KERN_ERR "gfb: Could not register framebuffer %s\n", | |
159 | dp->full_name); | |
160 | goto err_unmap_fb; | |
161 | } | |
162 | ||
163 | dev_set_drvdata(&op->dev, info); | |
164 | ||
165 | return 0; | |
166 | ||
167 | err_unmap_fb: | |
168 | of_iounmap(&op->resource[6], gp->fb_base, gp->fb_size); | |
169 | ||
170 | err_release_fb: | |
171 | framebuffer_release(info); | |
172 | ||
173 | err_out: | |
174 | return err; | |
175 | } | |
176 | ||
2d378b91 DM |
177 | static const struct of_device_id gfb_match[] = { |
178 | { | |
179 | .name = "SUNW,gfb", | |
180 | }, | |
181 | {}, | |
182 | }; | |
2d378b91 | 183 | |
28541d0f | 184 | static struct platform_driver gfb_driver = { |
2d378b91 | 185 | .probe = gfb_probe, |
4018294b | 186 | .driver = { |
27844cb8 PG |
187 | .name = "gfb", |
188 | .of_match_table = gfb_match, | |
189 | .suppress_bind_attrs = true, | |
4018294b | 190 | }, |
2d378b91 DM |
191 | }; |
192 | ||
193 | static int __init gfb_init(void) | |
194 | { | |
195 | if (fb_get_options("gfb", NULL)) | |
196 | return -ENODEV; | |
197 | ||
28541d0f | 198 | return platform_driver_register(&gfb_driver); |
2d378b91 | 199 | } |
27844cb8 | 200 | device_initcall(gfb_init); |