2 * drivers/video/chipsfb.c -- frame buffer device for
3 * Chips & Technologies 65550 chip.
5 * Copyright (C) 1998-2002 Paul Mackerras
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.
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
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>
24 #include <linux/vmalloc.h>
25 #include <linux/delay.h>
26 #include <linux/interrupt.h>
29 #include <linux/init.h>
30 #include <linux/pci.h>
31 #include <linux/console.h>
33 #ifdef CONFIG_PMAC_BACKLIGHT
34 #include <asm/backlight.h>
38 * Since we access the display with inb/outb to fixed port numbers,
39 * we can only handle one 6555x chip. -- paulus
41 #define write_ind(num, val, ap, dp) do { \
42 outb((num), (ap)); outb((val), (dp)); \
44 #define read_ind(num, var, ap, dp) do { \
45 outb((num), (ap)); var = inb((dp)); \
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)
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); \
67 #define read_ar(num, var) do { \
68 inb(0x3da); read_ind(num, var, 0x3c0, 0x3c1); \
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);
84 static const struct fb_ops chipsfb_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,
93 static int chipsfb_check_var(struct fb_var_screeninfo *var,
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)
100 || (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
103 var->xres = var->xres_virtual = 800;
104 var->yres = var->yres_virtual = 600;
109 static int chipsfb_set_par(struct fb_info *info)
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
117 info->fix.line_length = 800*2;
118 info->fix.visual = FB_VISUAL_TRUECOLOR;
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;
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
133 info->fix.line_length = 800;
134 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
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;
145 static int chipsfb_blank(int blank, struct fb_info *info)
147 return 1; /* get fb_blank to set the colormap to all black */
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)
167 struct chips_init_reg {
172 static struct chips_init_reg chips_init_sr[] = {
179 static struct chips_init_reg chips_init_gr[] = {
185 static struct chips_init_reg chips_init_ar[] = {
191 static struct chips_init_reg chips_init_cr[] = {
222 static struct chips_init_reg chips_init_fr[] = {
232 /* { 0x12, 0x40 }, -- 3400 needs 40, 2400 needs 48, no way to tell */
250 static struct chips_init_reg chips_init_xr[] = {
251 { 0xce, 0x00 }, /* set default memory clock */
252 { 0xcc, 0x43 }, /* memory clock ratio */
275 static void chips_hw_init(void)
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(0x29, 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);
294 static const struct fb_fix_screeninfo chipsfb_fix = {
296 .type = FB_TYPE_PACKED_PIXELS,
297 .visual = FB_VISUAL_PSEUDOCOLOR,
298 .accel = FB_ACCEL_NONE,
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.
308 .smem_len = 0x100000, /* 1MB */
311 static const struct fb_var_screeninfo chipsfb_var = {
317 .red = { .length = 8 },
318 .green = { .length = 8 },
319 .blue = { .length = 8 },
322 .vmode = FB_VMODE_NONINTERLACED,
332 static void init_chips(struct fb_info *p, unsigned long addr)
334 fb_memset_io(p->screen_base, 0, 0x100000);
336 p->fix = chipsfb_fix;
337 p->fix.smem_start = addr;
339 p->var = chipsfb_var;
341 p->fbops = &chipsfb_ops;
343 fb_alloc_cmap(&p->cmap, 256, 0);
348 static int chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *ent)
355 rc = aperture_remove_conflicting_pci_devices(dp, "chipsfb");
359 rc = pci_enable_device(dp);
361 dev_err(&dp->dev, "Cannot enable PCI device\n");
365 if ((dp->resource[0].flags & IORESOURCE_MEM) == 0) {
369 addr = pci_resource_start(dp, 0);
375 p = framebuffer_alloc(0, &dp->dev);
381 if (pci_request_region(dp, 0, "chipsfb") != 0) {
382 dev_err(&dp->dev, "Cannot request framebuffer\n");
388 addr += 0x800000; // Use big-endian aperture
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(dp, PCI_COMMAND, &cmd);
395 cmd |= 3; /* enable memory and IO space */
396 pci_write_config_word(dp, PCI_COMMAND, cmd);
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 = BACKLIGHT_POWER_ON;
403 backlight_update_status(pmac_backlight);
405 mutex_unlock(&pmac_backlight_mutex);
406 #endif /* CONFIG_PMAC_BACKLIGHT */
409 p->screen_base = ioremap_wc(addr, 0x200000);
411 p->screen_base = ioremap(addr, 0x200000);
413 if (p->screen_base == NULL) {
414 dev_err(&dp->dev, "Cannot map framebuffer\n");
416 goto err_release_pci;
419 pci_set_drvdata(dp, p);
423 rc = register_framebuffer(p);
425 dev_err(&dp->dev,"C&T 65550 framebuffer failed to register\n");
429 dev_info(&dp->dev,"fb%d: Chips 65550 frame buffer"
430 " (%dK RAM detected)\n",
431 p->node, p->fix.smem_len / 1024);
436 iounmap(p->screen_base);
438 pci_release_region(dp, 0);
440 framebuffer_release(p);
442 pci_disable_device(dp);
447 static void chipsfb_remove(struct pci_dev *dp)
449 struct fb_info *p = pci_get_drvdata(dp);
451 if (p->screen_base == NULL)
453 unregister_framebuffer(p);
454 iounmap(p->screen_base);
455 p->screen_base = NULL;
456 pci_release_region(dp, 0);
460 static int chipsfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
462 struct fb_info *p = pci_get_drvdata(pdev);
464 if (state.event == pdev->dev.power.power_state.event)
466 if (!(state.event & PM_EVENT_SLEEP))
471 fb_set_suspend(p, 1);
474 pdev->dev.power.power_state = state;
478 static int chipsfb_pci_resume(struct pci_dev *pdev)
480 struct fb_info *p = pci_get_drvdata(pdev);
483 fb_set_suspend(p, 0);
487 pdev->dev.power.power_state = PMSG_ON;
490 #endif /* CONFIG_PM */
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 },
498 MODULE_DEVICE_TABLE(pci, chipsfb_pci_tbl);
500 static struct pci_driver chipsfb_driver = {
502 .id_table = chipsfb_pci_tbl,
503 .probe = chipsfb_pci_init,
504 .remove = chipsfb_remove,
506 .suspend = chipsfb_pci_suspend,
507 .resume = chipsfb_pci_resume,
511 int __init chips_init(void)
513 if (fb_modesetting_disabled("chipsfb"))
516 if (fb_get_options("chipsfb", NULL))
519 return pci_register_driver(&chipsfb_driver);
522 module_init(chips_init);
524 static void __exit chipsfb_exit(void)
526 pci_unregister_driver(&chipsfb_driver);
529 MODULE_LICENSE("GPL");