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Commit | Line | Data |
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1da177e4 | 1 | /* |
af690a94 | 2 | * linux/drivers/video/pmag-ba-fb.c |
1da177e4 | 3 | * |
af690a94 RB |
4 | * PMAG-BA TURBOchannel Color Frame Buffer (CFB) card support, |
5 | * derived from: | |
1da177e4 LT |
6 | * "HP300 Topcat framebuffer support (derived from macfb of all things) |
7 | * Phil Blundell <philb@gnu.org> 1998", the original code can be | |
af690a94 | 8 | * found in the file hpfb.c in the same directory. |
1da177e4 LT |
9 | * |
10 | * Based on digital document: | |
11 | * "PMAG-BA TURBOchannel Color Frame Buffer | |
12 | * Functional Specification", Revision 1.2, August 27, 1990 | |
13 | * | |
af690a94 RB |
14 | * DECstation related code Copyright (C) 1999, 2000, 2001 by |
15 | * Michael Engel <engel@unix-ag.org>, | |
16 | * Karsten Merker <merker@linuxtag.org> and | |
1da177e4 | 17 | * Harald Koerfgen. |
335dc50c MR |
18 | * Copyright (c) 2005, 2006 Maciej W. Rozycki |
19 | * Copyright (c) 2005 James Simmons | |
1da177e4 | 20 | * |
af690a94 RB |
21 | * This file is subject to the terms and conditions of the GNU General |
22 | * Public License. See the file COPYING in the main directory of this | |
23 | * archive for more details. | |
1da177e4 | 24 | */ |
af690a94 RB |
25 | |
26 | #include <linux/compiler.h> | |
1da177e4 | 27 | #include <linux/errno.h> |
1da177e4 | 28 | #include <linux/fb.h> |
af690a94 RB |
29 | #include <linux/init.h> |
30 | #include <linux/kernel.h> | |
31 | #include <linux/module.h> | |
335dc50c | 32 | #include <linux/tc.h> |
af690a94 RB |
33 | #include <linux/types.h> |
34 | ||
af690a94 | 35 | #include <asm/io.h> |
af690a94 | 36 | |
1da177e4 LT |
37 | #include <video/pmag-ba-fb.h> |
38 | ||
af690a94 RB |
39 | |
40 | struct pmagbafb_par { | |
af690a94 RB |
41 | volatile void __iomem *mmio; |
42 | volatile u32 __iomem *dac; | |
1da177e4 LT |
43 | }; |
44 | ||
1da177e4 | 45 | |
9625b513 | 46 | static struct fb_var_screeninfo pmagbafb_defined __devinitdata = { |
1da177e4 LT |
47 | .xres = 1024, |
48 | .yres = 864, | |
49 | .xres_virtual = 1024, | |
50 | .yres_virtual = 864, | |
51 | .bits_per_pixel = 8, | |
52 | .red.length = 8, | |
53 | .green.length = 8, | |
54 | .blue.length = 8, | |
55 | .activate = FB_ACTIVATE_NOW, | |
af690a94 RB |
56 | .height = -1, |
57 | .width = -1, | |
58 | .accel_flags = FB_ACCEL_NONE, | |
59 | .pixclock = 14452, | |
60 | .left_margin = 116, | |
61 | .right_margin = 12, | |
62 | .upper_margin = 34, | |
63 | .lower_margin = 12, | |
64 | .hsync_len = 128, | |
65 | .vsync_len = 3, | |
66 | .sync = FB_SYNC_ON_GREEN, | |
1da177e4 LT |
67 | .vmode = FB_VMODE_NONINTERLACED, |
68 | }; | |
69 | ||
9625b513 | 70 | static struct fb_fix_screeninfo pmagbafb_fix __devinitdata = { |
1da177e4 | 71 | .id = "PMAG-BA", |
af690a94 | 72 | .smem_len = (1024 * 1024), |
1da177e4 LT |
73 | .type = FB_TYPE_PACKED_PIXELS, |
74 | .visual = FB_VISUAL_PSEUDOCOLOR, | |
75 | .line_length = 1024, | |
af690a94 | 76 | .mmio_len = PMAG_BA_SIZE - PMAG_BA_BT459, |
1da177e4 LT |
77 | }; |
78 | ||
af690a94 RB |
79 | |
80 | static inline void dac_write(struct pmagbafb_par *par, unsigned int reg, u8 v) | |
1da177e4 | 81 | { |
af690a94 | 82 | writeb(v, par->dac + reg / 4); |
1da177e4 LT |
83 | } |
84 | ||
af690a94 RB |
85 | static inline u8 dac_read(struct pmagbafb_par *par, unsigned int reg) |
86 | { | |
87 | return readb(par->dac + reg / 4); | |
88 | } | |
89 | ||
90 | ||
1da177e4 | 91 | /* |
af690a94 | 92 | * Set the palette. |
1da177e4 | 93 | */ |
af690a94 RB |
94 | static int pmagbafb_setcolreg(unsigned int regno, unsigned int red, |
95 | unsigned int green, unsigned int blue, | |
96 | unsigned int transp, struct fb_info *info) | |
1da177e4 | 97 | { |
af690a94 | 98 | struct pmagbafb_par *par = info->par; |
1da177e4 | 99 | |
2f390380 KH |
100 | if (regno >= info->cmap.len) |
101 | return 1; | |
1da177e4 LT |
102 | |
103 | red >>= 8; /* The cmap fields are 16 bits */ | |
af690a94 | 104 | green >>= 8; /* wide, but the hardware colormap */ |
1da177e4 LT |
105 | blue >>= 8; /* registers are only 8 bits wide */ |
106 | ||
af690a94 RB |
107 | mb(); |
108 | dac_write(par, BT459_ADDR_LO, regno); | |
109 | dac_write(par, BT459_ADDR_HI, 0x00); | |
110 | wmb(); | |
111 | dac_write(par, BT459_CMAP, red); | |
112 | wmb(); | |
113 | dac_write(par, BT459_CMAP, green); | |
114 | wmb(); | |
115 | dac_write(par, BT459_CMAP, blue); | |
116 | ||
1da177e4 LT |
117 | return 0; |
118 | } | |
119 | ||
120 | static struct fb_ops pmagbafb_ops = { | |
121 | .owner = THIS_MODULE, | |
1da177e4 LT |
122 | .fb_setcolreg = pmagbafb_setcolreg, |
123 | .fb_fillrect = cfb_fillrect, | |
124 | .fb_copyarea = cfb_copyarea, | |
125 | .fb_imageblit = cfb_imageblit, | |
1da177e4 LT |
126 | }; |
127 | ||
af690a94 RB |
128 | |
129 | /* | |
130 | * Turn the hardware cursor off. | |
131 | */ | |
132 | static void __init pmagbafb_erase_cursor(struct fb_info *info) | |
133 | { | |
134 | struct pmagbafb_par *par = info->par; | |
135 | ||
136 | mb(); | |
137 | dac_write(par, BT459_ADDR_LO, 0x00); | |
138 | dac_write(par, BT459_ADDR_HI, 0x03); | |
139 | wmb(); | |
140 | dac_write(par, BT459_DATA, 0x00); | |
141 | } | |
142 | ||
143 | ||
9625b513 | 144 | static int __devinit pmagbafb_probe(struct device *dev) |
1da177e4 | 145 | { |
335dc50c MR |
146 | struct tc_dev *tdev = to_tc_dev(dev); |
147 | resource_size_t start, len; | |
af690a94 RB |
148 | struct fb_info *info; |
149 | struct pmagbafb_par *par; | |
53ee1b5b | 150 | int err; |
af690a94 | 151 | |
335dc50c | 152 | info = framebuffer_alloc(sizeof(struct pmagbafb_par), dev); |
53ee1b5b | 153 | if (!info) { |
7ad33e74 | 154 | printk(KERN_ERR "%s: Cannot allocate memory\n", dev_name(dev)); |
af690a94 | 155 | return -ENOMEM; |
53ee1b5b | 156 | } |
af690a94 RB |
157 | |
158 | par = info->par; | |
335dc50c | 159 | dev_set_drvdata(dev, info); |
af690a94 | 160 | |
53ee1b5b MR |
161 | if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { |
162 | printk(KERN_ERR "%s: Cannot allocate color map\n", | |
7ad33e74 | 163 | dev_name(dev)); |
53ee1b5b | 164 | err = -ENOMEM; |
af690a94 | 165 | goto err_alloc; |
53ee1b5b | 166 | } |
af690a94 | 167 | |
1da177e4 | 168 | info->fbops = &pmagbafb_ops; |
af690a94 | 169 | info->fix = pmagbafb_fix; |
1da177e4 | 170 | info->var = pmagbafb_defined; |
1da177e4 LT |
171 | info->flags = FBINFO_DEFAULT; |
172 | ||
335dc50c MR |
173 | /* Request the I/O MEM resource. */ |
174 | start = tdev->resource.start; | |
175 | len = tdev->resource.end - start + 1; | |
7ad33e74 KS |
176 | if (!request_mem_region(start, len, dev_name(dev))) { |
177 | printk(KERN_ERR "%s: Cannot reserve FB region\n", | |
178 | dev_name(dev)); | |
53ee1b5b | 179 | err = -EBUSY; |
335dc50c | 180 | goto err_cmap; |
53ee1b5b | 181 | } |
335dc50c | 182 | |
af690a94 | 183 | /* MMIO mapping setup. */ |
335dc50c | 184 | info->fix.mmio_start = start; |
af690a94 | 185 | par->mmio = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len); |
53ee1b5b | 186 | if (!par->mmio) { |
7ad33e74 | 187 | printk(KERN_ERR "%s: Cannot map MMIO\n", dev_name(dev)); |
53ee1b5b | 188 | err = -ENOMEM; |
335dc50c | 189 | goto err_resource; |
53ee1b5b | 190 | } |
af690a94 RB |
191 | par->dac = par->mmio + PMAG_BA_BT459; |
192 | ||
193 | /* Frame buffer mapping setup. */ | |
335dc50c | 194 | info->fix.smem_start = start + PMAG_BA_FBMEM; |
af690a94 RB |
195 | info->screen_base = ioremap_nocache(info->fix.smem_start, |
196 | info->fix.smem_len); | |
53ee1b5b | 197 | if (!info->screen_base) { |
7ad33e74 | 198 | printk(KERN_ERR "%s: Cannot map FB\n", dev_name(dev)); |
53ee1b5b | 199 | err = -ENOMEM; |
af690a94 | 200 | goto err_mmio_map; |
53ee1b5b | 201 | } |
af690a94 RB |
202 | info->screen_size = info->fix.smem_len; |
203 | ||
204 | pmagbafb_erase_cursor(info); | |
1da177e4 | 205 | |
53ee1b5b MR |
206 | err = register_framebuffer(info); |
207 | if (err < 0) { | |
208 | printk(KERN_ERR "%s: Cannot register framebuffer\n", | |
7ad33e74 | 209 | dev_name(dev)); |
af690a94 | 210 | goto err_smem_map; |
53ee1b5b | 211 | } |
af690a94 | 212 | |
335dc50c MR |
213 | get_device(dev); |
214 | ||
215 | pr_info("fb%d: %s frame buffer device at %s\n", | |
7ad33e74 | 216 | info->node, info->fix.id, dev_name(dev)); |
af690a94 | 217 | |
1da177e4 | 218 | return 0; |
af690a94 RB |
219 | |
220 | ||
221 | err_smem_map: | |
222 | iounmap(info->screen_base); | |
223 | ||
224 | err_mmio_map: | |
225 | iounmap(par->mmio); | |
226 | ||
335dc50c MR |
227 | err_resource: |
228 | release_mem_region(start, len); | |
229 | ||
af690a94 RB |
230 | err_cmap: |
231 | fb_dealloc_cmap(&info->cmap); | |
232 | ||
233 | err_alloc: | |
af690a94 | 234 | framebuffer_release(info); |
53ee1b5b | 235 | return err; |
1da177e4 LT |
236 | } |
237 | ||
335dc50c | 238 | static int __exit pmagbafb_remove(struct device *dev) |
af690a94 | 239 | { |
335dc50c MR |
240 | struct tc_dev *tdev = to_tc_dev(dev); |
241 | struct fb_info *info = dev_get_drvdata(dev); | |
af690a94 | 242 | struct pmagbafb_par *par = info->par; |
335dc50c | 243 | resource_size_t start, len; |
1da177e4 | 244 | |
335dc50c | 245 | put_device(dev); |
af690a94 RB |
246 | unregister_framebuffer(info); |
247 | iounmap(info->screen_base); | |
248 | iounmap(par->mmio); | |
335dc50c MR |
249 | start = tdev->resource.start; |
250 | len = tdev->resource.end - start + 1; | |
251 | release_mem_region(start, len); | |
af690a94 | 252 | fb_dealloc_cmap(&info->cmap); |
af690a94 | 253 | framebuffer_release(info); |
335dc50c | 254 | return 0; |
af690a94 RB |
255 | } |
256 | ||
257 | ||
258 | /* | |
335dc50c | 259 | * Initialize the framebuffer. |
af690a94 | 260 | */ |
335dc50c MR |
261 | static const struct tc_device_id pmagbafb_tc_table[] = { |
262 | { "DEC ", "PMAG-BA " }, | |
263 | { } | |
264 | }; | |
265 | MODULE_DEVICE_TABLE(tc, pmagbafb_tc_table); | |
266 | ||
267 | static struct tc_driver pmagbafb_driver = { | |
268 | .id_table = pmagbafb_tc_table, | |
269 | .driver = { | |
270 | .name = "pmagbafb", | |
271 | .bus = &tc_bus_type, | |
272 | .probe = pmagbafb_probe, | |
273 | .remove = __exit_p(pmagbafb_remove), | |
274 | }, | |
275 | }; | |
276 | ||
af690a94 | 277 | static int __init pmagbafb_init(void) |
1da177e4 | 278 | { |
335dc50c | 279 | #ifndef MODULE |
1da177e4 | 280 | if (fb_get_options("pmagbafb", NULL)) |
af690a94 | 281 | return -ENXIO; |
335dc50c MR |
282 | #endif |
283 | return tc_register_driver(&pmagbafb_driver); | |
1da177e4 LT |
284 | } |
285 | ||
af690a94 RB |
286 | static void __exit pmagbafb_exit(void) |
287 | { | |
335dc50c | 288 | tc_unregister_driver(&pmagbafb_driver); |
af690a94 RB |
289 | } |
290 | ||
291 | ||
1da177e4 | 292 | module_init(pmagbafb_init); |
af690a94 RB |
293 | module_exit(pmagbafb_exit); |
294 | ||
1da177e4 | 295 | MODULE_LICENSE("GPL"); |