1 | /* |
2 | * drivers/video/chipsfb.c -- frame buffer device for |
3 | * Chips & Technologies 65550 chip. |
4 | * |
5 | * Copyright (C) 1998-2002 Paul Mackerras |
6 | * |
7 | * This file is derived from the Powermac "chips" driver: |
8 | * Copyright (C) 1997 Fabio Riccardi. |
9 | * And from the frame buffer device for Open Firmware-initialized devices: |
10 | * Copyright (C) 1997 Geert Uytterhoeven. |
11 | * |
12 | * This file is subject to the terms and conditions of the GNU General Public |
13 | * License. See the file COPYING in the main directory of this archive for |
14 | * more details. |
15 | */ |
16 | |
17 | #include <linux/aperture.h> |
18 | #include <linux/backlight.h> |
19 | #include <linux/module.h> |
20 | #include <linux/kernel.h> |
21 | #include <linux/errno.h> |
22 | #include <linux/string.h> |
23 | #include <linux/mm.h> |
24 | #include <linux/vmalloc.h> |
25 | #include <linux/delay.h> |
26 | #include <linux/interrupt.h> |
27 | #include <linux/fb.h> |
28 | #include <linux/pm.h> |
29 | #include <linux/init.h> |
30 | #include <linux/pci.h> |
31 | #include <linux/console.h> |
32 | |
33 | #ifdef CONFIG_PMAC_BACKLIGHT |
34 | #include <asm/backlight.h> |
35 | #endif |
36 | |
37 | /* |
38 | * Since we access the display with inb/outb to fixed port numbers, |
39 | * we can only handle one 6555x chip. -- paulus |
40 | */ |
41 | #define write_ind(num, val, ap, dp) do { \ |
42 | outb((num), (ap)); outb((val), (dp)); \ |
43 | } while (0) |
44 | #define read_ind(num, var, ap, dp) do { \ |
45 | outb((num), (ap)); var = inb((dp)); \ |
46 | } while (0) |
47 | |
48 | /* extension registers */ |
49 | #define write_xr(num, val) write_ind(num, val, 0x3d6, 0x3d7) |
50 | #define read_xr(num, var) read_ind(num, var, 0x3d6, 0x3d7) |
51 | /* flat panel registers */ |
52 | #define write_fr(num, val) write_ind(num, val, 0x3d0, 0x3d1) |
53 | #define read_fr(num, var) read_ind(num, var, 0x3d0, 0x3d1) |
54 | /* CRTC registers */ |
55 | #define write_cr(num, val) write_ind(num, val, 0x3d4, 0x3d5) |
56 | #define read_cr(num, var) read_ind(num, var, 0x3d4, 0x3d5) |
57 | /* graphics registers */ |
58 | #define write_gr(num, val) write_ind(num, val, 0x3ce, 0x3cf) |
59 | #define read_gr(num, var) read_ind(num, var, 0x3ce, 0x3cf) |
60 | /* sequencer registers */ |
61 | #define write_sr(num, val) write_ind(num, val, 0x3c4, 0x3c5) |
62 | #define read_sr(num, var) read_ind(num, var, 0x3c4, 0x3c5) |
63 | /* attribute registers - slightly strange */ |
64 | #define write_ar(num, val) do { \ |
65 | inb(0x3da); write_ind(num, val, 0x3c0, 0x3c0); \ |
66 | } while (0) |
67 | #define read_ar(num, var) do { \ |
68 | inb(0x3da); read_ind(num, var, 0x3c0, 0x3c1); \ |
69 | } while (0) |
70 | |
71 | /* |
72 | * Exported functions |
73 | */ |
74 | int chips_init(void); |
75 | |
76 | static int chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *); |
77 | static int chipsfb_check_var(struct fb_var_screeninfo *var, |
78 | struct fb_info *info); |
79 | static int chipsfb_set_par(struct fb_info *info); |
80 | static int chipsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, |
81 | u_int transp, struct fb_info *info); |
82 | static int chipsfb_blank(int blank, struct fb_info *info); |
83 | |
84 | static const struct fb_ops chipsfb_ops = { |
85 | .owner = THIS_MODULE, |
86 | FB_DEFAULT_IOMEM_OPS, |
87 | .fb_check_var = chipsfb_check_var, |
88 | .fb_set_par = chipsfb_set_par, |
89 | .fb_setcolreg = chipsfb_setcolreg, |
90 | .fb_blank = chipsfb_blank, |
91 | }; |
92 | |
93 | static int chipsfb_check_var(struct fb_var_screeninfo *var, |
94 | struct fb_info *info) |
95 | { |
96 | if (var->xres > 800 || var->yres > 600 |
97 | || var->xres_virtual > 800 || var->yres_virtual > 600 |
98 | || (var->bits_per_pixel != 8 && var->bits_per_pixel != 16) |
99 | || var->nonstd |
100 | || (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED) |
101 | return -EINVAL; |
102 | |
103 | var->xres = var->xres_virtual = 800; |
104 | var->yres = var->yres_virtual = 600; |
105 | |
106 | return 0; |
107 | } |
108 | |
109 | static int chipsfb_set_par(struct fb_info *info) |
110 | { |
111 | if (info->var.bits_per_pixel == 16) { |
112 | write_cr(0x13, 200); // Set line length (doublewords) |
113 | write_xr(0x81, 0x14); // 15 bit (555) color mode |
114 | write_xr(0x82, 0x00); // Disable palettes |
115 | write_xr(0x20, 0x10); // 16 bit blitter mode |
116 | |
117 | info->fix.line_length = 800*2; |
118 | info->fix.visual = FB_VISUAL_TRUECOLOR; |
119 | |
120 | info->var.red.offset = 10; |
121 | info->var.green.offset = 5; |
122 | info->var.blue.offset = 0; |
123 | info->var.red.length = info->var.green.length = |
124 | info->var.blue.length = 5; |
125 | |
126 | } else { |
127 | /* p->var.bits_per_pixel == 8 */ |
128 | write_cr(0x13, 100); // Set line length (doublewords) |
129 | write_xr(0x81, 0x12); // 8 bit color mode |
130 | write_xr(0x82, 0x08); // Graphics gamma enable |
131 | write_xr(0x20, 0x00); // 8 bit blitter mode |
132 | |
133 | info->fix.line_length = 800; |
134 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
135 | |
136 | info->var.red.offset = info->var.green.offset = |
137 | info->var.blue.offset = 0; |
138 | info->var.red.length = info->var.green.length = |
139 | info->var.blue.length = 8; |
140 | |
141 | } |
142 | return 0; |
143 | } |
144 | |
145 | static int chipsfb_blank(int blank, struct fb_info *info) |
146 | { |
147 | return 1; /* get fb_blank to set the colormap to all black */ |
148 | } |
149 | |
150 | static int chipsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, |
151 | u_int transp, struct fb_info *info) |
152 | { |
153 | if (regno > 255) |
154 | return 1; |
155 | red >>= 8; |
156 | green >>= 8; |
157 | blue >>= 8; |
158 | outb(value: regno, port: 0x3c8); |
159 | udelay(1); |
160 | outb(value: red, port: 0x3c9); |
161 | outb(value: green, port: 0x3c9); |
162 | outb(value: blue, port: 0x3c9); |
163 | |
164 | return 0; |
165 | } |
166 | |
167 | struct chips_init_reg { |
168 | unsigned char addr; |
169 | unsigned char data; |
170 | }; |
171 | |
172 | static struct chips_init_reg chips_init_sr[] = { |
173 | { 0x00, 0x03 }, |
174 | { 0x01, 0x01 }, |
175 | { 0x02, 0x0f }, |
176 | { 0x04, 0x0e } |
177 | }; |
178 | |
179 | static struct chips_init_reg chips_init_gr[] = { |
180 | { 0x05, 0x00 }, |
181 | { 0x06, 0x0d }, |
182 | { 0x08, 0xff } |
183 | }; |
184 | |
185 | static struct chips_init_reg chips_init_ar[] = { |
186 | { 0x10, 0x01 }, |
187 | { 0x12, 0x0f }, |
188 | { 0x13, 0x00 } |
189 | }; |
190 | |
191 | static struct chips_init_reg chips_init_cr[] = { |
192 | { 0x00, 0x7f }, |
193 | { 0x01, 0x63 }, |
194 | { 0x02, 0x63 }, |
195 | { 0x03, 0x83 }, |
196 | { 0x04, 0x66 }, |
197 | { 0x05, 0x10 }, |
198 | { 0x06, 0x72 }, |
199 | { 0x07, 0x3e }, |
200 | { 0x08, 0x00 }, |
201 | { 0x09, 0x40 }, |
202 | { 0x0c, 0x00 }, |
203 | { 0x0d, 0x00 }, |
204 | { 0x10, 0x59 }, |
205 | { 0x11, 0x0d }, |
206 | { 0x12, 0x57 }, |
207 | { 0x13, 0x64 }, |
208 | { 0x14, 0x00 }, |
209 | { 0x15, 0x57 }, |
210 | { 0x16, 0x73 }, |
211 | { 0x17, 0xe3 }, |
212 | { 0x18, 0xff }, |
213 | { 0x30, 0x02 }, |
214 | { 0x31, 0x02 }, |
215 | { 0x32, 0x02 }, |
216 | { 0x33, 0x02 }, |
217 | { 0x40, 0x00 }, |
218 | { 0x41, 0x00 }, |
219 | { 0x40, 0x80 } |
220 | }; |
221 | |
222 | static struct chips_init_reg chips_init_fr[] = { |
223 | { 0x01, 0x02 }, |
224 | { 0x03, 0x08 }, |
225 | { 0x04, 0x81 }, |
226 | { 0x05, 0x21 }, |
227 | { 0x08, 0x0c }, |
228 | { 0x0a, 0x74 }, |
229 | { 0x0b, 0x11 }, |
230 | { 0x10, 0x0c }, |
231 | { 0x11, 0xe0 }, |
232 | /* { 0x12, 0x40 }, -- 3400 needs 40, 2400 needs 48, no way to tell */ |
233 | { 0x20, 0x63 }, |
234 | { 0x21, 0x68 }, |
235 | { 0x22, 0x19 }, |
236 | { 0x23, 0x7f }, |
237 | { 0x24, 0x68 }, |
238 | { 0x26, 0x00 }, |
239 | { 0x27, 0x0f }, |
240 | { 0x30, 0x57 }, |
241 | { 0x31, 0x58 }, |
242 | { 0x32, 0x0d }, |
243 | { 0x33, 0x72 }, |
244 | { 0x34, 0x02 }, |
245 | { 0x35, 0x22 }, |
246 | { 0x36, 0x02 }, |
247 | { 0x37, 0x00 } |
248 | }; |
249 | |
250 | static struct chips_init_reg chips_init_xr[] = { |
251 | { 0xce, 0x00 }, /* set default memory clock */ |
252 | { 0xcc, 0x43 }, /* memory clock ratio */ |
253 | { 0xcd, 0x18 }, |
254 | { 0xce, 0xa1 }, |
255 | { 0xc8, 0x84 }, |
256 | { 0xc9, 0x0a }, |
257 | { 0xca, 0x00 }, |
258 | { 0xcb, 0x20 }, |
259 | { 0xcf, 0x06 }, |
260 | { 0xd0, 0x0e }, |
261 | { 0x09, 0x01 }, |
262 | { 0x0a, 0x02 }, |
263 | { 0x0b, 0x01 }, |
264 | { 0x20, 0x00 }, |
265 | { 0x40, 0x03 }, |
266 | { 0x41, 0x01 }, |
267 | { 0x42, 0x00 }, |
268 | { 0x80, 0x82 }, |
269 | { 0x81, 0x12 }, |
270 | { 0x82, 0x08 }, |
271 | { 0xa0, 0x00 }, |
272 | { 0xa8, 0x00 } |
273 | }; |
274 | |
275 | static void chips_hw_init(void) |
276 | { |
277 | int i; |
278 | |
279 | for (i = 0; i < ARRAY_SIZE(chips_init_xr); ++i) |
280 | write_xr(chips_init_xr[i].addr, chips_init_xr[i].data); |
281 | outb(value: 0x29, port: 0x3c2); /* set misc output reg */ |
282 | for (i = 0; i < ARRAY_SIZE(chips_init_sr); ++i) |
283 | write_sr(chips_init_sr[i].addr, chips_init_sr[i].data); |
284 | for (i = 0; i < ARRAY_SIZE(chips_init_gr); ++i) |
285 | write_gr(chips_init_gr[i].addr, chips_init_gr[i].data); |
286 | for (i = 0; i < ARRAY_SIZE(chips_init_ar); ++i) |
287 | write_ar(chips_init_ar[i].addr, chips_init_ar[i].data); |
288 | for (i = 0; i < ARRAY_SIZE(chips_init_cr); ++i) |
289 | write_cr(chips_init_cr[i].addr, chips_init_cr[i].data); |
290 | for (i = 0; i < ARRAY_SIZE(chips_init_fr); ++i) |
291 | write_fr(chips_init_fr[i].addr, chips_init_fr[i].data); |
292 | } |
293 | |
294 | static const struct fb_fix_screeninfo chipsfb_fix = { |
295 | .id = "C&T 65550" , |
296 | .type = FB_TYPE_PACKED_PIXELS, |
297 | .visual = FB_VISUAL_PSEUDOCOLOR, |
298 | .accel = FB_ACCEL_NONE, |
299 | .line_length = 800, |
300 | |
301 | // FIXME: Assumes 1MB frame buffer, but 65550 supports 1MB or 2MB. |
302 | // * "3500" PowerBook G3 (the original PB G3) has 2MB. |
303 | // * 2400 has 1MB composed of 2 Mitsubishi M5M4V4265CTP DRAM chips. |
304 | // Motherboard actually supports 2MB -- there are two blank locations |
305 | // for a second pair of DRAMs. (Thanks, Apple!) |
306 | // * 3400 has 1MB (I think). Don't know if it's expandable. |
307 | // -- Tim Seufert |
308 | .smem_len = 0x100000, /* 1MB */ |
309 | }; |
310 | |
311 | static const struct fb_var_screeninfo chipsfb_var = { |
312 | .xres = 800, |
313 | .yres = 600, |
314 | .xres_virtual = 800, |
315 | .yres_virtual = 600, |
316 | .bits_per_pixel = 8, |
317 | .red = { .length = 8 }, |
318 | .green = { .length = 8 }, |
319 | .blue = { .length = 8 }, |
320 | .height = -1, |
321 | .width = -1, |
322 | .vmode = FB_VMODE_NONINTERLACED, |
323 | .pixclock = 10000, |
324 | .left_margin = 16, |
325 | .right_margin = 16, |
326 | .upper_margin = 16, |
327 | .lower_margin = 16, |
328 | .hsync_len = 8, |
329 | .vsync_len = 8, |
330 | }; |
331 | |
332 | static void init_chips(struct fb_info *p, unsigned long addr) |
333 | { |
334 | fb_memset_io(addr: p->screen_base, c: 0, n: 0x100000); |
335 | |
336 | p->fix = chipsfb_fix; |
337 | p->fix.smem_start = addr; |
338 | |
339 | p->var = chipsfb_var; |
340 | |
341 | p->fbops = &chipsfb_ops; |
342 | |
343 | fb_alloc_cmap(cmap: &p->cmap, len: 256, transp: 0); |
344 | |
345 | chips_hw_init(); |
346 | } |
347 | |
348 | static int chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *ent) |
349 | { |
350 | struct fb_info *p; |
351 | unsigned long addr; |
352 | unsigned short cmd; |
353 | int rc; |
354 | |
355 | rc = aperture_remove_conflicting_pci_devices(pdev: dp, name: "chipsfb" ); |
356 | if (rc) |
357 | return rc; |
358 | |
359 | rc = pci_enable_device(dev: dp); |
360 | if (rc < 0) { |
361 | dev_err(&dp->dev, "Cannot enable PCI device\n" ); |
362 | goto err_out; |
363 | } |
364 | |
365 | if ((dp->resource[0].flags & IORESOURCE_MEM) == 0) { |
366 | rc = -ENODEV; |
367 | goto err_disable; |
368 | } |
369 | addr = pci_resource_start(dp, 0); |
370 | if (addr == 0) { |
371 | rc = -ENODEV; |
372 | goto err_disable; |
373 | } |
374 | |
375 | p = framebuffer_alloc(size: 0, dev: &dp->dev); |
376 | if (p == NULL) { |
377 | rc = -ENOMEM; |
378 | goto err_disable; |
379 | } |
380 | |
381 | if (pci_request_region(dp, 0, "chipsfb" ) != 0) { |
382 | dev_err(&dp->dev, "Cannot request framebuffer\n" ); |
383 | rc = -EBUSY; |
384 | goto err_release_fb; |
385 | } |
386 | |
387 | #ifdef __BIG_ENDIAN |
388 | addr += 0x800000; // Use big-endian aperture |
389 | #endif |
390 | |
391 | /* we should use pci_enable_device here, but, |
392 | the device doesn't declare its I/O ports in its BARs |
393 | so pci_enable_device won't turn on I/O responses */ |
394 | pci_read_config_word(dev: dp, PCI_COMMAND, val: &cmd); |
395 | cmd |= 3; /* enable memory and IO space */ |
396 | pci_write_config_word(dev: dp, PCI_COMMAND, val: cmd); |
397 | |
398 | #ifdef CONFIG_PMAC_BACKLIGHT |
399 | /* turn on the backlight */ |
400 | mutex_lock(&pmac_backlight_mutex); |
401 | if (pmac_backlight) { |
402 | pmac_backlight->props.power = FB_BLANK_UNBLANK; |
403 | backlight_update_status(pmac_backlight); |
404 | } |
405 | mutex_unlock(&pmac_backlight_mutex); |
406 | #endif /* CONFIG_PMAC_BACKLIGHT */ |
407 | |
408 | #ifdef CONFIG_PPC |
409 | p->screen_base = ioremap_wc(addr, 0x200000); |
410 | #else |
411 | p->screen_base = ioremap(offset: addr, size: 0x200000); |
412 | #endif |
413 | if (p->screen_base == NULL) { |
414 | dev_err(&dp->dev, "Cannot map framebuffer\n" ); |
415 | rc = -ENOMEM; |
416 | goto err_release_pci; |
417 | } |
418 | |
419 | pci_set_drvdata(pdev: dp, data: p); |
420 | |
421 | init_chips(p, addr); |
422 | |
423 | rc = register_framebuffer(fb_info: p); |
424 | if (rc < 0) { |
425 | dev_err(&dp->dev,"C&T 65550 framebuffer failed to register\n" ); |
426 | goto err_unmap; |
427 | } |
428 | |
429 | dev_info(&dp->dev,"fb%d: Chips 65550 frame buffer" |
430 | " (%dK RAM detected)\n" , |
431 | p->node, p->fix.smem_len / 1024); |
432 | |
433 | return 0; |
434 | |
435 | err_unmap: |
436 | iounmap(addr: p->screen_base); |
437 | err_release_pci: |
438 | pci_release_region(dp, 0); |
439 | err_release_fb: |
440 | framebuffer_release(info: p); |
441 | err_disable: |
442 | pci_disable_device(dev: dp); |
443 | err_out: |
444 | return rc; |
445 | } |
446 | |
447 | static void chipsfb_remove(struct pci_dev *dp) |
448 | { |
449 | struct fb_info *p = pci_get_drvdata(pdev: dp); |
450 | |
451 | if (p->screen_base == NULL) |
452 | return; |
453 | unregister_framebuffer(fb_info: p); |
454 | iounmap(addr: p->screen_base); |
455 | p->screen_base = NULL; |
456 | pci_release_region(dp, 0); |
457 | } |
458 | |
459 | #ifdef CONFIG_PM |
460 | static int chipsfb_pci_suspend(struct pci_dev *pdev, pm_message_t state) |
461 | { |
462 | struct fb_info *p = pci_get_drvdata(pdev); |
463 | |
464 | if (state.event == pdev->dev.power.power_state.event) |
465 | return 0; |
466 | if (!(state.event & PM_EVENT_SLEEP)) |
467 | goto done; |
468 | |
469 | console_lock(); |
470 | chipsfb_blank(blank: 1, info: p); |
471 | fb_set_suspend(info: p, state: 1); |
472 | console_unlock(); |
473 | done: |
474 | pdev->dev.power.power_state = state; |
475 | return 0; |
476 | } |
477 | |
478 | static int chipsfb_pci_resume(struct pci_dev *pdev) |
479 | { |
480 | struct fb_info *p = pci_get_drvdata(pdev); |
481 | |
482 | console_lock(); |
483 | fb_set_suspend(info: p, state: 0); |
484 | chipsfb_blank(blank: 0, info: p); |
485 | console_unlock(); |
486 | |
487 | pdev->dev.power.power_state = PMSG_ON; |
488 | return 0; |
489 | } |
490 | #endif /* CONFIG_PM */ |
491 | |
492 | |
493 | static struct pci_device_id chipsfb_pci_tbl[] = { |
494 | { PCI_VENDOR_ID_CT, PCI_DEVICE_ID_CT_65550, PCI_ANY_ID, PCI_ANY_ID }, |
495 | { 0 } |
496 | }; |
497 | |
498 | MODULE_DEVICE_TABLE(pci, chipsfb_pci_tbl); |
499 | |
500 | static struct pci_driver chipsfb_driver = { |
501 | .name = "chipsfb" , |
502 | .id_table = chipsfb_pci_tbl, |
503 | .probe = chipsfb_pci_init, |
504 | .remove = chipsfb_remove, |
505 | #ifdef CONFIG_PM |
506 | .suspend = chipsfb_pci_suspend, |
507 | .resume = chipsfb_pci_resume, |
508 | #endif |
509 | }; |
510 | |
511 | int __init chips_init(void) |
512 | { |
513 | if (fb_modesetting_disabled(drvname: "chipsfb" )) |
514 | return -ENODEV; |
515 | |
516 | if (fb_get_options(name: "chipsfb" , NULL)) |
517 | return -ENODEV; |
518 | |
519 | return pci_register_driver(&chipsfb_driver); |
520 | } |
521 | |
522 | module_init(chips_init); |
523 | |
524 | static void __exit chipsfb_exit(void) |
525 | { |
526 | pci_unregister_driver(dev: &chipsfb_driver); |
527 | } |
528 | |
529 | MODULE_LICENSE("GPL" ); |
530 | |