1 /* sunxvr500.c: Sun 3DLABS XVR-500 Expert3D fb driver for sparc64 systems
2 *
3 * License: GPL
4 *
5 * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
6 */
7
8 #include <linux/aperture.h>
9 #include <linux/kernel.h>
10 #include <linux/fb.h>
11 #include <linux/pci.h>
12 #include <linux/init.h>
13 #include <linux/of.h>
14
15 #include <asm/io.h>
16
17 /* XXX This device has a 'dev-comm' property which apparently is
18 * XXX a pointer into the openfirmware's address space which is
19 * XXX a shared area the kernel driver can use to keep OBP
20 * XXX informed about the current resolution setting. The idea
21 * XXX is that the kernel can change resolutions, and as long
22 * XXX as the values in the 'dev-comm' area are accurate then
23 * XXX OBP can still render text properly to the console.
24 * XXX
25 * XXX I'm still working out the layout of this and whether there
26 * XXX are any signatures we need to look for etc.
27 */
28 struct e3d_info {
29 struct fb_info *info;
30 struct pci_dev *pdev;
31
32 spinlock_t lock;
33
34 char __iomem *fb_base;
35 unsigned long fb_base_phys;
36
37 unsigned long fb8_buf_diff;
38 unsigned long regs_base_phys;
39
40 void __iomem *ramdac;
41
42 struct device_node *of_node;
43
44 unsigned int width;
45 unsigned int height;
46 unsigned int depth;
47 unsigned int fb_size;
48
49 u32 fb_base_reg;
50 u32 fb8_0_off;
51 u32 fb8_1_off;
52
53 u32 pseudo_palette[16];
54 };
55
e3d_get_props(struct e3d_info * ep)56 static int e3d_get_props(struct e3d_info *ep)
57 {
58 ep->width = of_getintprop_default(ep->of_node, "width", 0);
59 ep->height = of_getintprop_default(ep->of_node, "height", 0);
60 ep->depth = of_getintprop_default(ep->of_node, "depth", 8);
61
62 if (!ep->width || !ep->height) {
63 printk(KERN_ERR "e3d: Critical properties missing for %s\n",
64 pci_name(ep->pdev));
65 return -EINVAL;
66 }
67
68 return 0;
69 }
70
71 /* My XVR-500 comes up, at 1280x768 and a FB base register value of
72 * 0x04000000, the following video layout register values:
73 *
74 * RAMDAC_VID_WH 0x03ff04ff
75 * RAMDAC_VID_CFG 0x1a0b0088
76 * RAMDAC_VID_32FB_0 0x04000000
77 * RAMDAC_VID_32FB_1 0x04800000
78 * RAMDAC_VID_8FB_0 0x05000000
79 * RAMDAC_VID_8FB_1 0x05200000
80 * RAMDAC_VID_XXXFB 0x05400000
81 * RAMDAC_VID_YYYFB 0x05c00000
82 * RAMDAC_VID_ZZZFB 0x05e00000
83 */
84 /* Video layout registers */
85 #define RAMDAC_VID_WH 0x00000070UL /* (height-1)<<16 | (width-1) */
86 #define RAMDAC_VID_CFG 0x00000074UL /* 0x1a000088|(linesz_log2<<16) */
87 #define RAMDAC_VID_32FB_0 0x00000078UL /* PCI base 32bpp FB buffer 0 */
88 #define RAMDAC_VID_32FB_1 0x0000007cUL /* PCI base 32bpp FB buffer 1 */
89 #define RAMDAC_VID_8FB_0 0x00000080UL /* PCI base 8bpp FB buffer 0 */
90 #define RAMDAC_VID_8FB_1 0x00000084UL /* PCI base 8bpp FB buffer 1 */
91 #define RAMDAC_VID_XXXFB 0x00000088UL /* PCI base of XXX FB */
92 #define RAMDAC_VID_YYYFB 0x0000008cUL /* PCI base of YYY FB */
93 #define RAMDAC_VID_ZZZFB 0x00000090UL /* PCI base of ZZZ FB */
94
95 /* CLUT registers */
96 #define RAMDAC_INDEX 0x000000bcUL
97 #define RAMDAC_DATA 0x000000c0UL
98
e3d_clut_write(struct e3d_info * ep,int index,u32 val)99 static void e3d_clut_write(struct e3d_info *ep, int index, u32 val)
100 {
101 void __iomem *ramdac = ep->ramdac;
102 unsigned long flags;
103
104 spin_lock_irqsave(&ep->lock, flags);
105
106 writel(index, ramdac + RAMDAC_INDEX);
107 writel(val, ramdac + RAMDAC_DATA);
108
109 spin_unlock_irqrestore(&ep->lock, flags);
110 }
111
e3d_setcolreg(unsigned regno,unsigned red,unsigned green,unsigned blue,unsigned transp,struct fb_info * info)112 static int e3d_setcolreg(unsigned regno,
113 unsigned red, unsigned green, unsigned blue,
114 unsigned transp, struct fb_info *info)
115 {
116 struct e3d_info *ep = info->par;
117 u32 red_8, green_8, blue_8;
118 u32 red_10, green_10, blue_10;
119 u32 value;
120
121 if (regno >= 256)
122 return 1;
123
124 red_8 = red >> 8;
125 green_8 = green >> 8;
126 blue_8 = blue >> 8;
127
128 value = (blue_8 << 24) | (green_8 << 16) | (red_8 << 8);
129
130 if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16)
131 ((u32 *)info->pseudo_palette)[regno] = value;
132
133
134 red_10 = red >> 6;
135 green_10 = green >> 6;
136 blue_10 = blue >> 6;
137
138 value = (blue_10 << 20) | (green_10 << 10) | (red_10 << 0);
139 e3d_clut_write(ep, regno, value);
140
141 return 0;
142 }
143
144 /* XXX This is a bit of a hack. I can't figure out exactly how the
145 * XXX two 8bpp areas of the framebuffer work. I imagine there is
146 * XXX a WID attribute somewhere else in the framebuffer which tells
147 * XXX the ramdac which of the two 8bpp framebuffer regions to take
148 * XXX the pixel from. So, for now, render into both regions to make
149 * XXX sure the pixel shows up.
150 */
e3d_imageblit(struct fb_info * info,const struct fb_image * image)151 static void e3d_imageblit(struct fb_info *info, const struct fb_image *image)
152 {
153 struct e3d_info *ep = info->par;
154 unsigned long flags;
155
156 spin_lock_irqsave(&ep->lock, flags);
157 cfb_imageblit(info, image);
158 info->screen_base += ep->fb8_buf_diff;
159 cfb_imageblit(info, image);
160 info->screen_base -= ep->fb8_buf_diff;
161 spin_unlock_irqrestore(&ep->lock, flags);
162 }
163
e3d_fillrect(struct fb_info * info,const struct fb_fillrect * rect)164 static void e3d_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
165 {
166 struct e3d_info *ep = info->par;
167 unsigned long flags;
168
169 spin_lock_irqsave(&ep->lock, flags);
170 cfb_fillrect(info, rect);
171 info->screen_base += ep->fb8_buf_diff;
172 cfb_fillrect(info, rect);
173 info->screen_base -= ep->fb8_buf_diff;
174 spin_unlock_irqrestore(&ep->lock, flags);
175 }
176
e3d_copyarea(struct fb_info * info,const struct fb_copyarea * area)177 static void e3d_copyarea(struct fb_info *info, const struct fb_copyarea *area)
178 {
179 struct e3d_info *ep = info->par;
180 unsigned long flags;
181
182 spin_lock_irqsave(&ep->lock, flags);
183 cfb_copyarea(info, area);
184 info->screen_base += ep->fb8_buf_diff;
185 cfb_copyarea(info, area);
186 info->screen_base -= ep->fb8_buf_diff;
187 spin_unlock_irqrestore(&ep->lock, flags);
188 }
189
190 static const struct fb_ops e3d_ops = {
191 .owner = THIS_MODULE,
192 .fb_setcolreg = e3d_setcolreg,
193 .fb_fillrect = e3d_fillrect,
194 .fb_copyarea = e3d_copyarea,
195 .fb_imageblit = e3d_imageblit,
196 };
197
e3d_set_fbinfo(struct e3d_info * ep)198 static int e3d_set_fbinfo(struct e3d_info *ep)
199 {
200 struct fb_info *info = ep->info;
201 struct fb_var_screeninfo *var = &info->var;
202
203 info->fbops = &e3d_ops;
204 info->screen_base = ep->fb_base;
205 info->screen_size = ep->fb_size;
206
207 info->pseudo_palette = ep->pseudo_palette;
208
209 /* Fill fix common fields */
210 strscpy(info->fix.id, "e3d", sizeof(info->fix.id));
211 info->fix.smem_start = ep->fb_base_phys;
212 info->fix.smem_len = ep->fb_size;
213 info->fix.type = FB_TYPE_PACKED_PIXELS;
214 if (ep->depth == 32 || ep->depth == 24)
215 info->fix.visual = FB_VISUAL_TRUECOLOR;
216 else
217 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
218
219 var->xres = ep->width;
220 var->yres = ep->height;
221 var->xres_virtual = var->xres;
222 var->yres_virtual = var->yres;
223 var->bits_per_pixel = ep->depth;
224
225 var->red.offset = 8;
226 var->red.length = 8;
227 var->green.offset = 16;
228 var->green.length = 8;
229 var->blue.offset = 24;
230 var->blue.length = 8;
231 var->transp.offset = 0;
232 var->transp.length = 0;
233
234 if (fb_alloc_cmap(&info->cmap, 256, 0)) {
235 printk(KERN_ERR "e3d: Cannot allocate color map.\n");
236 return -ENOMEM;
237 }
238
239 return 0;
240 }
241
e3d_pci_register(struct pci_dev * pdev,const struct pci_device_id * ent)242 static int e3d_pci_register(struct pci_dev *pdev,
243 const struct pci_device_id *ent)
244 {
245 struct device_node *of_node;
246 const char *device_type;
247 struct fb_info *info;
248 struct e3d_info *ep;
249 unsigned int line_length;
250 int err;
251
252 err = aperture_remove_conflicting_pci_devices(pdev, "e3dfb");
253 if (err)
254 return err;
255
256 of_node = pci_device_to_OF_node(pdev);
257 if (!of_node) {
258 printk(KERN_ERR "e3d: Cannot find OF node of %s\n",
259 pci_name(pdev));
260 return -ENODEV;
261 }
262
263 device_type = of_get_property(of_node, "device_type", NULL);
264 if (!device_type) {
265 printk(KERN_INFO "e3d: Ignoring secondary output device "
266 "at %s\n", pci_name(pdev));
267 return -ENODEV;
268 }
269
270 err = pci_enable_device(pdev);
271 if (err < 0) {
272 printk(KERN_ERR "e3d: Cannot enable PCI device %s\n",
273 pci_name(pdev));
274 goto err_out;
275 }
276
277 info = framebuffer_alloc(sizeof(struct e3d_info), &pdev->dev);
278 if (!info) {
279 err = -ENOMEM;
280 goto err_disable;
281 }
282
283 ep = info->par;
284 ep->info = info;
285 ep->pdev = pdev;
286 spin_lock_init(&ep->lock);
287 ep->of_node = of_node;
288
289 /* Read the PCI base register of the frame buffer, which we
290 * need in order to interpret the RAMDAC_VID_*FB* values in
291 * the ramdac correctly.
292 */
293 pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0,
294 &ep->fb_base_reg);
295 ep->fb_base_reg &= PCI_BASE_ADDRESS_MEM_MASK;
296
297 ep->regs_base_phys = pci_resource_start (pdev, 1);
298 err = pci_request_region(pdev, 1, "e3d regs");
299 if (err < 0) {
300 printk("e3d: Cannot request region 1 for %s\n",
301 pci_name(pdev));
302 goto err_release_fb;
303 }
304 ep->ramdac = ioremap(ep->regs_base_phys + 0x8000, 0x1000);
305 if (!ep->ramdac) {
306 err = -ENOMEM;
307 goto err_release_pci1;
308 }
309
310 ep->fb8_0_off = readl(ep->ramdac + RAMDAC_VID_8FB_0);
311 ep->fb8_0_off -= ep->fb_base_reg;
312
313 ep->fb8_1_off = readl(ep->ramdac + RAMDAC_VID_8FB_1);
314 ep->fb8_1_off -= ep->fb_base_reg;
315
316 ep->fb8_buf_diff = ep->fb8_1_off - ep->fb8_0_off;
317
318 ep->fb_base_phys = pci_resource_start (pdev, 0);
319 ep->fb_base_phys += ep->fb8_0_off;
320
321 err = pci_request_region(pdev, 0, "e3d framebuffer");
322 if (err < 0) {
323 printk("e3d: Cannot request region 0 for %s\n",
324 pci_name(pdev));
325 goto err_unmap_ramdac;
326 }
327
328 err = e3d_get_props(ep);
329 if (err)
330 goto err_release_pci0;
331
332 line_length = (readl(ep->ramdac + RAMDAC_VID_CFG) >> 16) & 0xff;
333 line_length = 1 << line_length;
334
335 switch (ep->depth) {
336 case 8:
337 info->fix.line_length = line_length;
338 break;
339 case 16:
340 info->fix.line_length = line_length * 2;
341 break;
342 case 24:
343 info->fix.line_length = line_length * 3;
344 break;
345 case 32:
346 info->fix.line_length = line_length * 4;
347 break;
348 }
349 ep->fb_size = info->fix.line_length * ep->height;
350
351 ep->fb_base = ioremap(ep->fb_base_phys, ep->fb_size);
352 if (!ep->fb_base) {
353 err = -ENOMEM;
354 goto err_release_pci0;
355 }
356
357 err = e3d_set_fbinfo(ep);
358 if (err)
359 goto err_unmap_fb;
360
361 pci_set_drvdata(pdev, info);
362
363 printk("e3d: Found device at %s\n", pci_name(pdev));
364
365 err = register_framebuffer(info);
366 if (err < 0) {
367 printk(KERN_ERR "e3d: Could not register framebuffer %s\n",
368 pci_name(pdev));
369 goto err_free_cmap;
370 }
371
372 return 0;
373
374 err_free_cmap:
375 fb_dealloc_cmap(&info->cmap);
376
377 err_unmap_fb:
378 iounmap(ep->fb_base);
379
380 err_release_pci0:
381 pci_release_region(pdev, 0);
382
383 err_unmap_ramdac:
384 iounmap(ep->ramdac);
385
386 err_release_pci1:
387 pci_release_region(pdev, 1);
388
389 err_release_fb:
390 framebuffer_release(info);
391
392 err_disable:
393 pci_disable_device(pdev);
394
395 err_out:
396 return err;
397 }
398
399 static const struct pci_device_id e3d_pci_table[] = {
400 { PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a0), },
401 { PCI_DEVICE(0x1091, 0x7a0), },
402 { PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a2), },
403 { .vendor = PCI_VENDOR_ID_3DLABS,
404 .device = PCI_ANY_ID,
405 .subvendor = PCI_VENDOR_ID_3DLABS,
406 .subdevice = 0x0108,
407 },
408 { .vendor = PCI_VENDOR_ID_3DLABS,
409 .device = PCI_ANY_ID,
410 .subvendor = PCI_VENDOR_ID_3DLABS,
411 .subdevice = 0x0140,
412 },
413 { .vendor = PCI_VENDOR_ID_3DLABS,
414 .device = PCI_ANY_ID,
415 .subvendor = PCI_VENDOR_ID_3DLABS,
416 .subdevice = 0x1024,
417 },
418 { 0, }
419 };
420
421 static struct pci_driver e3d_driver = {
422 .driver = {
423 .suppress_bind_attrs = true,
424 },
425 .name = "e3d",
426 .id_table = e3d_pci_table,
427 .probe = e3d_pci_register,
428 };
429
e3d_init(void)430 static int __init e3d_init(void)
431 {
432 if (fb_modesetting_disabled("e3d"))
433 return -ENODEV;
434
435 if (fb_get_options("e3d", NULL))
436 return -ENODEV;
437
438 return pci_register_driver(&e3d_driver);
439 }
440 device_initcall(e3d_init);
441