blob: 73cb426bf2d7db5428ecb348da4b3fc112d2704c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/errno.h>
20#include <linux/string.h>
21#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/slab.h>
23#include <linux/vmalloc.h>
24#include <linux/delay.h>
25#include <linux/interrupt.h>
26#include <linux/fb.h>
27#include <linux/init.h>
28#include <linux/pci.h>
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -070029#include <linux/console.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <asm/io.h>
31
32#ifdef CONFIG_PMAC_BACKLIGHT
33#include <asm/backlight.h>
34#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
36/*
37 * Since we access the display with inb/outb to fixed port numbers,
38 * we can only handle one 6555x chip. -- paulus
39 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#define write_ind(num, val, ap, dp) do { \
41 outb((num), (ap)); outb((val), (dp)); \
42} while (0)
43#define read_ind(num, var, ap, dp) do { \
44 outb((num), (ap)); var = inb((dp)); \
45} while (0)
46
47/* extension registers */
48#define write_xr(num, val) write_ind(num, val, 0x3d6, 0x3d7)
49#define read_xr(num, var) read_ind(num, var, 0x3d6, 0x3d7)
50/* flat panel registers */
51#define write_fr(num, val) write_ind(num, val, 0x3d0, 0x3d1)
52#define read_fr(num, var) read_ind(num, var, 0x3d0, 0x3d1)
53/* CRTC registers */
54#define write_cr(num, val) write_ind(num, val, 0x3d4, 0x3d5)
55#define read_cr(num, var) read_ind(num, var, 0x3d4, 0x3d5)
56/* graphics registers */
57#define write_gr(num, val) write_ind(num, val, 0x3ce, 0x3cf)
58#define read_gr(num, var) read_ind(num, var, 0x3ce, 0x3cf)
59/* sequencer registers */
60#define write_sr(num, val) write_ind(num, val, 0x3c4, 0x3c5)
61#define read_sr(num, var) read_ind(num, var, 0x3c4, 0x3c5)
62/* attribute registers - slightly strange */
63#define write_ar(num, val) do { \
64 inb(0x3da); write_ind(num, val, 0x3c0, 0x3c0); \
65} while (0)
66#define read_ar(num, var) do { \
67 inb(0x3da); read_ind(num, var, 0x3c0, 0x3c1); \
68} while (0)
69
Linus Torvalds1da177e2005-04-16 15:20:36 -070070/*
71 * Exported functions
72 */
73int chips_init(void);
74
75static int chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *);
76static int chipsfb_check_var(struct fb_var_screeninfo *var,
77 struct fb_info *info);
78static int chipsfb_set_par(struct fb_info *info);
79static int chipsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
80 u_int transp, struct fb_info *info);
81static int chipsfb_blank(int blank, struct fb_info *info);
82
83static struct fb_ops chipsfb_ops = {
84 .owner = THIS_MODULE,
85 .fb_check_var = chipsfb_check_var,
86 .fb_set_par = chipsfb_set_par,
87 .fb_setcolreg = chipsfb_setcolreg,
88 .fb_blank = chipsfb_blank,
89 .fb_fillrect = cfb_fillrect,
90 .fb_copyarea = cfb_copyarea,
91 .fb_imageblit = cfb_imageblit,
Linus Torvalds1da177e2005-04-16 15:20:36 -070092};
93
94static int chipsfb_check_var(struct fb_var_screeninfo *var,
95 struct fb_info *info)
96{
97 if (var->xres > 800 || var->yres > 600
98 || var->xres_virtual > 800 || var->yres_virtual > 600
99 || (var->bits_per_pixel != 8 && var->bits_per_pixel != 16)
100 || var->nonstd
101 || (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
102 return -EINVAL;
103
104 var->xres = var->xres_virtual = 800;
105 var->yres = var->yres_virtual = 600;
106
107 return 0;
108}
109
110static int chipsfb_set_par(struct fb_info *info)
111{
112 if (info->var.bits_per_pixel == 16) {
113 write_cr(0x13, 200); // Set line length (doublewords)
114 write_xr(0x81, 0x14); // 15 bit (555) color mode
115 write_xr(0x82, 0x00); // Disable palettes
116 write_xr(0x20, 0x10); // 16 bit blitter mode
117
118 info->fix.line_length = 800*2;
119 info->fix.visual = FB_VISUAL_TRUECOLOR;
120
121 info->var.red.offset = 10;
122 info->var.green.offset = 5;
123 info->var.blue.offset = 0;
124 info->var.red.length = info->var.green.length =
125 info->var.blue.length = 5;
126
127 } else {
128 /* p->var.bits_per_pixel == 8 */
129 write_cr(0x13, 100); // Set line length (doublewords)
130 write_xr(0x81, 0x12); // 8 bit color mode
131 write_xr(0x82, 0x08); // Graphics gamma enable
132 write_xr(0x20, 0x00); // 8 bit blitter mode
133
134 info->fix.line_length = 800;
135 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
136
137 info->var.red.offset = info->var.green.offset =
138 info->var.blue.offset = 0;
139 info->var.red.length = info->var.green.length =
140 info->var.blue.length = 8;
141
142 }
143 return 0;
144}
145
146static int chipsfb_blank(int blank, struct fb_info *info)
147{
148#ifdef CONFIG_PMAC_BACKLIGHT
Michael Hanselmann5474c122006-06-25 05:47:08 -0700149 mutex_lock(&pmac_backlight_mutex);
150
151 if (pmac_backlight) {
Michael Hanselmann5474c122006-06-25 05:47:08 -0700152 /* used to disable backlight only for blank > 1, but it seems
153 * useful at blank = 1 too (saves battery, extends backlight
154 * life)
155 */
Michael Hanselmanne01af032006-07-10 04:44:45 -0700156 down(&pmac_backlight->sem);
Michael Hanselmann5474c122006-06-25 05:47:08 -0700157 if (blank)
158 pmac_backlight->props->power = FB_BLANK_POWERDOWN;
159 else
160 pmac_backlight->props->power = FB_BLANK_UNBLANK;
161 pmac_backlight->props->update_status(pmac_backlight);
162 up(&pmac_backlight->sem);
163 }
164
165 mutex_unlock(&pmac_backlight_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166#endif /* CONFIG_PMAC_BACKLIGHT */
167
168 return 1; /* get fb_blank to set the colormap to all black */
169}
170
171static int chipsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
172 u_int transp, struct fb_info *info)
173{
174 if (regno > 255)
175 return 1;
176 red >>= 8;
177 green >>= 8;
178 blue >>= 8;
179 outb(regno, 0x3c8);
180 udelay(1);
181 outb(red, 0x3c9);
182 outb(green, 0x3c9);
183 outb(blue, 0x3c9);
184
185 return 0;
186}
187
188struct chips_init_reg {
189 unsigned char addr;
190 unsigned char data;
191};
192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193static struct chips_init_reg chips_init_sr[] = {
194 { 0x00, 0x03 },
195 { 0x01, 0x01 },
196 { 0x02, 0x0f },
197 { 0x04, 0x0e }
198};
199
200static struct chips_init_reg chips_init_gr[] = {
201 { 0x05, 0x00 },
202 { 0x06, 0x0d },
203 { 0x08, 0xff }
204};
205
206static struct chips_init_reg chips_init_ar[] = {
207 { 0x10, 0x01 },
208 { 0x12, 0x0f },
209 { 0x13, 0x00 }
210};
211
212static struct chips_init_reg chips_init_cr[] = {
213 { 0x00, 0x7f },
214 { 0x01, 0x63 },
215 { 0x02, 0x63 },
216 { 0x03, 0x83 },
217 { 0x04, 0x66 },
218 { 0x05, 0x10 },
219 { 0x06, 0x72 },
220 { 0x07, 0x3e },
221 { 0x08, 0x00 },
222 { 0x09, 0x40 },
223 { 0x0c, 0x00 },
224 { 0x0d, 0x00 },
225 { 0x10, 0x59 },
226 { 0x11, 0x0d },
227 { 0x12, 0x57 },
228 { 0x13, 0x64 },
229 { 0x14, 0x00 },
230 { 0x15, 0x57 },
231 { 0x16, 0x73 },
232 { 0x17, 0xe3 },
233 { 0x18, 0xff },
234 { 0x30, 0x02 },
235 { 0x31, 0x02 },
236 { 0x32, 0x02 },
237 { 0x33, 0x02 },
238 { 0x40, 0x00 },
239 { 0x41, 0x00 },
240 { 0x40, 0x80 }
241};
242
243static struct chips_init_reg chips_init_fr[] = {
244 { 0x01, 0x02 },
245 { 0x03, 0x08 },
246 { 0x04, 0x81 },
247 { 0x05, 0x21 },
248 { 0x08, 0x0c },
249 { 0x0a, 0x74 },
250 { 0x0b, 0x11 },
251 { 0x10, 0x0c },
252 { 0x11, 0xe0 },
253 /* { 0x12, 0x40 }, -- 3400 needs 40, 2400 needs 48, no way to tell */
254 { 0x20, 0x63 },
255 { 0x21, 0x68 },
256 { 0x22, 0x19 },
257 { 0x23, 0x7f },
258 { 0x24, 0x68 },
259 { 0x26, 0x00 },
260 { 0x27, 0x0f },
261 { 0x30, 0x57 },
262 { 0x31, 0x58 },
263 { 0x32, 0x0d },
264 { 0x33, 0x72 },
265 { 0x34, 0x02 },
266 { 0x35, 0x22 },
267 { 0x36, 0x02 },
268 { 0x37, 0x00 }
269};
270
271static struct chips_init_reg chips_init_xr[] = {
272 { 0xce, 0x00 }, /* set default memory clock */
273 { 0xcc, 0x43 }, /* memory clock ratio */
274 { 0xcd, 0x18 },
275 { 0xce, 0xa1 },
276 { 0xc8, 0x84 },
277 { 0xc9, 0x0a },
278 { 0xca, 0x00 },
279 { 0xcb, 0x20 },
280 { 0xcf, 0x06 },
281 { 0xd0, 0x0e },
282 { 0x09, 0x01 },
283 { 0x0a, 0x02 },
284 { 0x0b, 0x01 },
285 { 0x20, 0x00 },
286 { 0x40, 0x03 },
287 { 0x41, 0x01 },
288 { 0x42, 0x00 },
289 { 0x80, 0x82 },
290 { 0x81, 0x12 },
291 { 0x82, 0x08 },
292 { 0xa0, 0x00 },
293 { 0xa8, 0x00 }
294};
295
296static void __init chips_hw_init(void)
297{
298 int i;
299
Tobias Klauserd1ae4182006-03-27 01:17:39 -0800300 for (i = 0; i < ARRAY_SIZE(chips_init_xr); ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 write_xr(chips_init_xr[i].addr, chips_init_xr[i].data);
302 outb(0x29, 0x3c2); /* set misc output reg */
Tobias Klauserd1ae4182006-03-27 01:17:39 -0800303 for (i = 0; i < ARRAY_SIZE(chips_init_sr); ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 write_sr(chips_init_sr[i].addr, chips_init_sr[i].data);
Tobias Klauserd1ae4182006-03-27 01:17:39 -0800305 for (i = 0; i < ARRAY_SIZE(chips_init_gr); ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 write_gr(chips_init_gr[i].addr, chips_init_gr[i].data);
Tobias Klauserd1ae4182006-03-27 01:17:39 -0800307 for (i = 0; i < ARRAY_SIZE(chips_init_ar); ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 write_ar(chips_init_ar[i].addr, chips_init_ar[i].data);
Tobias Klauserd1ae4182006-03-27 01:17:39 -0800309 for (i = 0; i < ARRAY_SIZE(chips_init_cr); ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 write_cr(chips_init_cr[i].addr, chips_init_cr[i].data);
Tobias Klauserd1ae4182006-03-27 01:17:39 -0800311 for (i = 0; i < ARRAY_SIZE(chips_init_fr); ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 write_fr(chips_init_fr[i].addr, chips_init_fr[i].data);
313}
314
315static struct fb_fix_screeninfo chipsfb_fix __initdata = {
316 .id = "C&T 65550",
317 .type = FB_TYPE_PACKED_PIXELS,
318 .visual = FB_VISUAL_PSEUDOCOLOR,
319 .accel = FB_ACCEL_NONE,
320 .line_length = 800,
321
322// FIXME: Assumes 1MB frame buffer, but 65550 supports 1MB or 2MB.
323// * "3500" PowerBook G3 (the original PB G3) has 2MB.
324// * 2400 has 1MB composed of 2 Mitsubishi M5M4V4265CTP DRAM chips.
325// Motherboard actually supports 2MB -- there are two blank locations
326// for a second pair of DRAMs. (Thanks, Apple!)
327// * 3400 has 1MB (I think). Don't know if it's expandable.
328// -- Tim Seufert
329 .smem_len = 0x100000, /* 1MB */
330};
331
332static struct fb_var_screeninfo chipsfb_var __initdata = {
333 .xres = 800,
334 .yres = 600,
335 .xres_virtual = 800,
336 .yres_virtual = 600,
337 .bits_per_pixel = 8,
338 .red = { .length = 8 },
339 .green = { .length = 8 },
340 .blue = { .length = 8 },
341 .height = -1,
342 .width = -1,
343 .vmode = FB_VMODE_NONINTERLACED,
344 .pixclock = 10000,
345 .left_margin = 16,
346 .right_margin = 16,
347 .upper_margin = 16,
348 .lower_margin = 16,
349 .hsync_len = 8,
350 .vsync_len = 8,
351};
352
353static void __init init_chips(struct fb_info *p, unsigned long addr)
354{
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700355 memset(p->screen_base, 0, 0x100000);
356
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 p->fix = chipsfb_fix;
358 p->fix.smem_start = addr;
359
360 p->var = chipsfb_var;
361
362 p->fbops = &chipsfb_ops;
363 p->flags = FBINFO_DEFAULT;
364
365 fb_alloc_cmap(&p->cmap, 256, 0);
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 chips_hw_init();
368}
369
370static int __devinit
371chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *ent)
372{
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700373 struct fb_info *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 unsigned long addr, size;
375 unsigned short cmd;
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700376 int rc = -ENODEV;
377
378 if (pci_enable_device(dp) < 0) {
379 dev_err(&dp->dev, "Cannot enable PCI device\n");
380 goto err_out;
381 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
383 if ((dp->resource[0].flags & IORESOURCE_MEM) == 0)
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700384 goto err_disable;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 addr = pci_resource_start(dp, 0);
386 size = pci_resource_len(dp, 0);
387 if (addr == 0)
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700388 goto err_disable;
389
390 p = framebuffer_alloc(0, &dp->dev);
391 if (p == NULL) {
392 dev_err(&dp->dev, "Cannot allocate framebuffer structure\n");
393 rc = -ENOMEM;
394 goto err_disable;
395 }
396
397 if (pci_request_region(dp, 0, "chipsfb") != 0) {
398 dev_err(&dp->dev, "Cannot request framebuffer\n");
399 rc = -EBUSY;
400 goto err_release_fb;
401 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
403#ifdef __BIG_ENDIAN
404 addr += 0x800000; // Use big-endian aperture
405#endif
406
407 /* we should use pci_enable_device here, but,
408 the device doesn't declare its I/O ports in its BARs
409 so pci_enable_device won't turn on I/O responses */
410 pci_read_config_word(dp, PCI_COMMAND, &cmd);
411 cmd |= 3; /* enable memory and IO space */
412 pci_write_config_word(dp, PCI_COMMAND, cmd);
413
414#ifdef CONFIG_PMAC_BACKLIGHT
415 /* turn on the backlight */
Michael Hanselmann5474c122006-06-25 05:47:08 -0700416 mutex_lock(&pmac_backlight_mutex);
417 if (pmac_backlight) {
418 down(&pmac_backlight->sem);
419 pmac_backlight->props->power = FB_BLANK_UNBLANK;
420 pmac_backlight->props->update_status(pmac_backlight);
421 up(&pmac_backlight->sem);
422 }
423 mutex_unlock(&pmac_backlight_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424#endif /* CONFIG_PMAC_BACKLIGHT */
425
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700426#ifdef CONFIG_PPC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 p->screen_base = __ioremap(addr, 0x200000, _PAGE_NO_CACHE);
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700428#else
429 p->screen_base = ioremap(addr, 0x200000);
430#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 if (p->screen_base == NULL) {
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700432 dev_err(&dp->dev, "Cannot map framebuffer\n");
433 rc = -ENOMEM;
434 goto err_release_pci;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 pci_set_drvdata(dp, p);
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700438 p->device = &dp->dev;
439
440 init_chips(p, addr);
441
442 if (register_framebuffer(p) < 0) {
443 dev_err(&dp->dev,"C&T 65550 framebuffer failed to register\n");
444 goto err_unmap;
445 }
446
447 dev_info(&dp->dev,"fb%d: Chips 65550 frame buffer"
448 " (%dK RAM detected)\n",
449 p->node, p->fix.smem_len / 1024);
450
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 return 0;
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700452
453 err_unmap:
454 iounmap(p->screen_base);
455 err_release_pci:
456 pci_release_region(dp, 0);
457 err_release_fb:
458 framebuffer_release(p);
459 err_disable:
460 err_out:
461 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462}
463
464static void __devexit chipsfb_remove(struct pci_dev *dp)
465{
466 struct fb_info *p = pci_get_drvdata(dp);
467
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700468 if (p->screen_base == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 return;
470 unregister_framebuffer(p);
471 iounmap(p->screen_base);
472 p->screen_base = NULL;
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700473 pci_release_region(dp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474}
475
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700476#ifdef CONFIG_PM
477static int chipsfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
478{
479 struct fb_info *p = pci_get_drvdata(pdev);
480
Pavel Machekca078ba2005-09-03 15:56:57 -0700481 if (state.event == pdev->dev.power.power_state.event)
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700482 return 0;
Pavel Machekca078ba2005-09-03 15:56:57 -0700483 if (state.event != PM_SUSPEND_MEM)
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700484 goto done;
485
486 acquire_console_sem();
487 chipsfb_blank(1, p);
488 fb_set_suspend(p, 1);
489 release_console_sem();
490 done:
491 pdev->dev.power.power_state = state;
492 return 0;
493}
494
495static int chipsfb_pci_resume(struct pci_dev *pdev)
496{
497 struct fb_info *p = pci_get_drvdata(pdev);
498
499 acquire_console_sem();
500 fb_set_suspend(p, 0);
501 chipsfb_blank(0, p);
502 release_console_sem();
503
504 pdev->dev.power.power_state = PMSG_ON;
505 return 0;
506}
507#endif /* CONFIG_PM */
508
509
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510static struct pci_device_id chipsfb_pci_tbl[] = {
511 { PCI_VENDOR_ID_CT, PCI_DEVICE_ID_CT_65550, PCI_ANY_ID, PCI_ANY_ID },
512 { 0 }
513};
514
515MODULE_DEVICE_TABLE(pci, chipsfb_pci_tbl);
516
517static struct pci_driver chipsfb_driver = {
518 .name = "chipsfb",
519 .id_table = chipsfb_pci_tbl,
520 .probe = chipsfb_pci_init,
521 .remove = __devexit_p(chipsfb_remove),
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700522#ifdef CONFIG_PM
523 .suspend = chipsfb_pci_suspend,
524 .resume = chipsfb_pci_resume,
525#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526};
527
528int __init chips_init(void)
529{
530 if (fb_get_options("chipsfb", NULL))
531 return -ENODEV;
532
533 return pci_register_driver(&chipsfb_driver);
534}
535
536module_init(chips_init);
537
538static void __exit chipsfb_exit(void)
539{
540 pci_unregister_driver(&chipsfb_driver);
541}
542
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543MODULE_LICENSE("GPL");