blob: 57b9d276497ed07e485311f38e95c6ef86af870e [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>
Rafael J. Wysocki26b97232007-07-26 10:41:12 -070027#include <linux/pm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/init.h>
29#include <linux/pci.h>
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -070030#include <linux/console.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <asm/io.h>
32
33#ifdef CONFIG_PMAC_BACKLIGHT
34#include <asm/backlight.h>
35#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
37/*
38 * Since we access the display with inb/outb to fixed port numbers,
39 * we can only handle one 6555x chip. -- paulus
40 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070071/*
72 * Exported functions
73 */
74int chips_init(void);
75
76static int chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *);
77static int chipsfb_check_var(struct fb_var_screeninfo *var,
78 struct fb_info *info);
79static int chipsfb_set_par(struct fb_info *info);
80static int chipsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
81 u_int transp, struct fb_info *info);
82static int chipsfb_blank(int blank, struct fb_info *info);
83
84static struct fb_ops chipsfb_ops = {
85 .owner = THIS_MODULE,
86 .fb_check_var = chipsfb_check_var,
87 .fb_set_par = chipsfb_set_par,
88 .fb_setcolreg = chipsfb_setcolreg,
89 .fb_blank = chipsfb_blank,
90 .fb_fillrect = cfb_fillrect,
91 .fb_copyarea = cfb_copyarea,
92 .fb_imageblit = cfb_imageblit,
Linus Torvalds1da177e2005-04-16 15:20:36 -070093};
94
95static int chipsfb_check_var(struct fb_var_screeninfo *var,
96 struct fb_info *info)
97{
98 if (var->xres > 800 || var->yres > 600
99 || var->xres_virtual > 800 || var->yres_virtual > 600
100 || (var->bits_per_pixel != 8 && var->bits_per_pixel != 16)
101 || var->nonstd
102 || (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
103 return -EINVAL;
104
105 var->xres = var->xres_virtual = 800;
106 var->yres = var->yres_virtual = 600;
107
108 return 0;
109}
110
111static int chipsfb_set_par(struct fb_info *info)
112{
113 if (info->var.bits_per_pixel == 16) {
114 write_cr(0x13, 200); // Set line length (doublewords)
115 write_xr(0x81, 0x14); // 15 bit (555) color mode
116 write_xr(0x82, 0x00); // Disable palettes
117 write_xr(0x20, 0x10); // 16 bit blitter mode
118
119 info->fix.line_length = 800*2;
120 info->fix.visual = FB_VISUAL_TRUECOLOR;
121
122 info->var.red.offset = 10;
123 info->var.green.offset = 5;
124 info->var.blue.offset = 0;
125 info->var.red.length = info->var.green.length =
126 info->var.blue.length = 5;
127
128 } else {
129 /* p->var.bits_per_pixel == 8 */
130 write_cr(0x13, 100); // Set line length (doublewords)
131 write_xr(0x81, 0x12); // 8 bit color mode
132 write_xr(0x82, 0x08); // Graphics gamma enable
133 write_xr(0x20, 0x00); // 8 bit blitter mode
134
135 info->fix.line_length = 800;
136 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
137
138 info->var.red.offset = info->var.green.offset =
139 info->var.blue.offset = 0;
140 info->var.red.length = info->var.green.length =
141 info->var.blue.length = 8;
142
143 }
144 return 0;
145}
146
147static int chipsfb_blank(int blank, struct fb_info *info)
148{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 return 1; /* get fb_blank to set the colormap to all black */
150}
151
152static int chipsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
153 u_int transp, struct fb_info *info)
154{
155 if (regno > 255)
156 return 1;
157 red >>= 8;
158 green >>= 8;
159 blue >>= 8;
160 outb(regno, 0x3c8);
161 udelay(1);
162 outb(red, 0x3c9);
163 outb(green, 0x3c9);
164 outb(blue, 0x3c9);
165
166 return 0;
167}
168
169struct chips_init_reg {
170 unsigned char addr;
171 unsigned char data;
172};
173
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174static struct chips_init_reg chips_init_sr[] = {
175 { 0x00, 0x03 },
176 { 0x01, 0x01 },
177 { 0x02, 0x0f },
178 { 0x04, 0x0e }
179};
180
181static struct chips_init_reg chips_init_gr[] = {
182 { 0x05, 0x00 },
183 { 0x06, 0x0d },
184 { 0x08, 0xff }
185};
186
187static struct chips_init_reg chips_init_ar[] = {
188 { 0x10, 0x01 },
189 { 0x12, 0x0f },
190 { 0x13, 0x00 }
191};
192
193static struct chips_init_reg chips_init_cr[] = {
194 { 0x00, 0x7f },
195 { 0x01, 0x63 },
196 { 0x02, 0x63 },
197 { 0x03, 0x83 },
198 { 0x04, 0x66 },
199 { 0x05, 0x10 },
200 { 0x06, 0x72 },
201 { 0x07, 0x3e },
202 { 0x08, 0x00 },
203 { 0x09, 0x40 },
204 { 0x0c, 0x00 },
205 { 0x0d, 0x00 },
206 { 0x10, 0x59 },
207 { 0x11, 0x0d },
208 { 0x12, 0x57 },
209 { 0x13, 0x64 },
210 { 0x14, 0x00 },
211 { 0x15, 0x57 },
212 { 0x16, 0x73 },
213 { 0x17, 0xe3 },
214 { 0x18, 0xff },
215 { 0x30, 0x02 },
216 { 0x31, 0x02 },
217 { 0x32, 0x02 },
218 { 0x33, 0x02 },
219 { 0x40, 0x00 },
220 { 0x41, 0x00 },
221 { 0x40, 0x80 }
222};
223
224static struct chips_init_reg chips_init_fr[] = {
225 { 0x01, 0x02 },
226 { 0x03, 0x08 },
227 { 0x04, 0x81 },
228 { 0x05, 0x21 },
229 { 0x08, 0x0c },
230 { 0x0a, 0x74 },
231 { 0x0b, 0x11 },
232 { 0x10, 0x0c },
233 { 0x11, 0xe0 },
234 /* { 0x12, 0x40 }, -- 3400 needs 40, 2400 needs 48, no way to tell */
235 { 0x20, 0x63 },
236 { 0x21, 0x68 },
237 { 0x22, 0x19 },
238 { 0x23, 0x7f },
239 { 0x24, 0x68 },
240 { 0x26, 0x00 },
241 { 0x27, 0x0f },
242 { 0x30, 0x57 },
243 { 0x31, 0x58 },
244 { 0x32, 0x0d },
245 { 0x33, 0x72 },
246 { 0x34, 0x02 },
247 { 0x35, 0x22 },
248 { 0x36, 0x02 },
249 { 0x37, 0x00 }
250};
251
252static struct chips_init_reg chips_init_xr[] = {
253 { 0xce, 0x00 }, /* set default memory clock */
254 { 0xcc, 0x43 }, /* memory clock ratio */
255 { 0xcd, 0x18 },
256 { 0xce, 0xa1 },
257 { 0xc8, 0x84 },
258 { 0xc9, 0x0a },
259 { 0xca, 0x00 },
260 { 0xcb, 0x20 },
261 { 0xcf, 0x06 },
262 { 0xd0, 0x0e },
263 { 0x09, 0x01 },
264 { 0x0a, 0x02 },
265 { 0x0b, 0x01 },
266 { 0x20, 0x00 },
267 { 0x40, 0x03 },
268 { 0x41, 0x01 },
269 { 0x42, 0x00 },
270 { 0x80, 0x82 },
271 { 0x81, 0x12 },
272 { 0x82, 0x08 },
273 { 0xa0, 0x00 },
274 { 0xa8, 0x00 }
275};
276
277static void __init chips_hw_init(void)
278{
279 int i;
280
Tobias Klauserd1ae4182006-03-27 01:17:39 -0800281 for (i = 0; i < ARRAY_SIZE(chips_init_xr); ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 write_xr(chips_init_xr[i].addr, chips_init_xr[i].data);
283 outb(0x29, 0x3c2); /* set misc output reg */
Tobias Klauserd1ae4182006-03-27 01:17:39 -0800284 for (i = 0; i < ARRAY_SIZE(chips_init_sr); ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 write_sr(chips_init_sr[i].addr, chips_init_sr[i].data);
Tobias Klauserd1ae4182006-03-27 01:17:39 -0800286 for (i = 0; i < ARRAY_SIZE(chips_init_gr); ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 write_gr(chips_init_gr[i].addr, chips_init_gr[i].data);
Tobias Klauserd1ae4182006-03-27 01:17:39 -0800288 for (i = 0; i < ARRAY_SIZE(chips_init_ar); ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 write_ar(chips_init_ar[i].addr, chips_init_ar[i].data);
Tobias Klauserd1ae4182006-03-27 01:17:39 -0800290 for (i = 0; i < ARRAY_SIZE(chips_init_cr); ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 write_cr(chips_init_cr[i].addr, chips_init_cr[i].data);
Tobias Klauserd1ae4182006-03-27 01:17:39 -0800292 for (i = 0; i < ARRAY_SIZE(chips_init_fr); ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 write_fr(chips_init_fr[i].addr, chips_init_fr[i].data);
294}
295
Olaf Hering74bfe032007-06-27 14:10:00 -0700296static struct fb_fix_screeninfo chipsfb_fix __devinitdata = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 .id = "C&T 65550",
298 .type = FB_TYPE_PACKED_PIXELS,
299 .visual = FB_VISUAL_PSEUDOCOLOR,
300 .accel = FB_ACCEL_NONE,
301 .line_length = 800,
302
303// FIXME: Assumes 1MB frame buffer, but 65550 supports 1MB or 2MB.
304// * "3500" PowerBook G3 (the original PB G3) has 2MB.
305// * 2400 has 1MB composed of 2 Mitsubishi M5M4V4265CTP DRAM chips.
306// Motherboard actually supports 2MB -- there are two blank locations
307// for a second pair of DRAMs. (Thanks, Apple!)
308// * 3400 has 1MB (I think). Don't know if it's expandable.
309// -- Tim Seufert
310 .smem_len = 0x100000, /* 1MB */
311};
312
Olaf Hering74bfe032007-06-27 14:10:00 -0700313static struct fb_var_screeninfo chipsfb_var __devinitdata = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 .xres = 800,
315 .yres = 600,
316 .xres_virtual = 800,
317 .yres_virtual = 600,
318 .bits_per_pixel = 8,
319 .red = { .length = 8 },
320 .green = { .length = 8 },
321 .blue = { .length = 8 },
322 .height = -1,
323 .width = -1,
324 .vmode = FB_VMODE_NONINTERLACED,
325 .pixclock = 10000,
326 .left_margin = 16,
327 .right_margin = 16,
328 .upper_margin = 16,
329 .lower_margin = 16,
330 .hsync_len = 8,
331 .vsync_len = 8,
332};
333
Olaf Hering74bfe032007-06-27 14:10:00 -0700334static void __devinit init_chips(struct fb_info *p, unsigned long addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335{
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700336 memset(p->screen_base, 0, 0x100000);
337
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 p->fix = chipsfb_fix;
339 p->fix.smem_start = addr;
340
341 p->var = chipsfb_var;
342
343 p->fbops = &chipsfb_ops;
344 p->flags = FBINFO_DEFAULT;
345
346 fb_alloc_cmap(&p->cmap, 256, 0);
347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 chips_hw_init();
349}
350
351static int __devinit
352chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *ent)
353{
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700354 struct fb_info *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 unsigned long addr, size;
356 unsigned short cmd;
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700357 int rc = -ENODEV;
358
359 if (pci_enable_device(dp) < 0) {
360 dev_err(&dp->dev, "Cannot enable PCI device\n");
361 goto err_out;
362 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
364 if ((dp->resource[0].flags & IORESOURCE_MEM) == 0)
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700365 goto err_disable;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 addr = pci_resource_start(dp, 0);
367 size = pci_resource_len(dp, 0);
368 if (addr == 0)
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700369 goto err_disable;
370
371 p = framebuffer_alloc(0, &dp->dev);
372 if (p == NULL) {
373 dev_err(&dp->dev, "Cannot allocate framebuffer structure\n");
374 rc = -ENOMEM;
375 goto err_disable;
376 }
377
378 if (pci_request_region(dp, 0, "chipsfb") != 0) {
379 dev_err(&dp->dev, "Cannot request framebuffer\n");
380 rc = -EBUSY;
381 goto err_release_fb;
382 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
384#ifdef __BIG_ENDIAN
385 addr += 0x800000; // Use big-endian aperture
386#endif
387
388 /* we should use pci_enable_device here, but,
389 the device doesn't declare its I/O ports in its BARs
390 so pci_enable_device won't turn on I/O responses */
391 pci_read_config_word(dp, PCI_COMMAND, &cmd);
392 cmd |= 3; /* enable memory and IO space */
393 pci_write_config_word(dp, PCI_COMMAND, cmd);
394
395#ifdef CONFIG_PMAC_BACKLIGHT
396 /* turn on the backlight */
Michael Hanselmann5474c122006-06-25 05:47:08 -0700397 mutex_lock(&pmac_backlight_mutex);
398 if (pmac_backlight) {
Richard Purdie599a52d2007-02-10 23:07:48 +0000399 pmac_backlight->props.power = FB_BLANK_UNBLANK;
Richard Purdie28ee0862007-02-08 22:25:09 +0000400 backlight_update_status(pmac_backlight);
Michael Hanselmann5474c122006-06-25 05:47:08 -0700401 }
402 mutex_unlock(&pmac_backlight_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403#endif /* CONFIG_PMAC_BACKLIGHT */
404
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700405#ifdef CONFIG_PPC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 p->screen_base = __ioremap(addr, 0x200000, _PAGE_NO_CACHE);
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700407#else
408 p->screen_base = ioremap(addr, 0x200000);
409#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 if (p->screen_base == NULL) {
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700411 dev_err(&dp->dev, "Cannot map framebuffer\n");
412 rc = -ENOMEM;
413 goto err_release_pci;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 pci_set_drvdata(dp, p);
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700417
418 init_chips(p, addr);
419
420 if (register_framebuffer(p) < 0) {
421 dev_err(&dp->dev,"C&T 65550 framebuffer failed to register\n");
422 goto err_unmap;
423 }
424
425 dev_info(&dp->dev,"fb%d: Chips 65550 frame buffer"
426 " (%dK RAM detected)\n",
427 p->node, p->fix.smem_len / 1024);
428
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 return 0;
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700430
431 err_unmap:
432 iounmap(p->screen_base);
433 err_release_pci:
434 pci_release_region(dp, 0);
435 err_release_fb:
436 framebuffer_release(p);
437 err_disable:
438 err_out:
439 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440}
441
442static void __devexit chipsfb_remove(struct pci_dev *dp)
443{
444 struct fb_info *p = pci_get_drvdata(dp);
445
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700446 if (p->screen_base == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 return;
448 unregister_framebuffer(p);
449 iounmap(p->screen_base);
450 p->screen_base = NULL;
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700451 pci_release_region(dp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452}
453
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700454#ifdef CONFIG_PM
455static int chipsfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
456{
457 struct fb_info *p = pci_get_drvdata(pdev);
458
Pavel Machekca078ba2005-09-03 15:56:57 -0700459 if (state.event == pdev->dev.power.power_state.event)
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700460 return 0;
Rafael J. Wysocki3a2d5b72008-02-23 19:13:25 +0100461 if (!(state.event & PM_EVENT_SLEEP))
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700462 goto done;
463
464 acquire_console_sem();
465 chipsfb_blank(1, p);
466 fb_set_suspend(p, 1);
467 release_console_sem();
468 done:
469 pdev->dev.power.power_state = state;
470 return 0;
471}
472
473static int chipsfb_pci_resume(struct pci_dev *pdev)
474{
475 struct fb_info *p = pci_get_drvdata(pdev);
476
477 acquire_console_sem();
478 fb_set_suspend(p, 0);
479 chipsfb_blank(0, p);
480 release_console_sem();
481
482 pdev->dev.power.power_state = PMSG_ON;
483 return 0;
484}
485#endif /* CONFIG_PM */
486
487
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488static struct pci_device_id chipsfb_pci_tbl[] = {
489 { PCI_VENDOR_ID_CT, PCI_DEVICE_ID_CT_65550, PCI_ANY_ID, PCI_ANY_ID },
490 { 0 }
491};
492
493MODULE_DEVICE_TABLE(pci, chipsfb_pci_tbl);
494
495static struct pci_driver chipsfb_driver = {
496 .name = "chipsfb",
497 .id_table = chipsfb_pci_tbl,
498 .probe = chipsfb_pci_init,
499 .remove = __devexit_p(chipsfb_remove),
Benjamin Herrenschmidt8c870932005-06-27 14:36:34 -0700500#ifdef CONFIG_PM
501 .suspend = chipsfb_pci_suspend,
502 .resume = chipsfb_pci_resume,
503#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504};
505
506int __init chips_init(void)
507{
508 if (fb_get_options("chipsfb", NULL))
509 return -ENODEV;
510
511 return pci_register_driver(&chipsfb_driver);
512}
513
514module_init(chips_init);
515
516static void __exit chipsfb_exit(void)
517{
518 pci_unregister_driver(&chipsfb_driver);
519}
520
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521MODULE_LICENSE("GPL");