2
* controlfb.c -- frame buffer device for the PowerMac 'control' display
4
* Created 12 July 1998 by Dan Jacobowitz <dan@debian.org>
5
* Copyright (C) 1998 Dan Jacobowitz
6
* Copyright (C) 2001 Takashi Oe
8
* Mmap code by Michel Lanners <mlan@cpu.lu>
10
* Frame buffer structure from:
11
* drivers/video/chipsfb.c -- frame buffer device for
12
* Chips & Technologies 65550 chip.
14
* Copyright (C) 1998 Paul Mackerras
16
* This file is derived from the Powermac "chips" driver:
17
* Copyright (C) 1997 Fabio Riccardi.
18
* And from the frame buffer device for Open Firmware-initialized devices:
19
* Copyright (C) 1997 Geert Uytterhoeven.
21
* Hardware information from:
22
* control.c: Console support for PowerMac "control" display adaptor.
23
* Copyright (C) 1996 Paul Mackerras
25
* Updated to 2.5 framebuffer API by Ben Herrenschmidt
26
* <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>,
27
* and James Simmons <jsimmons@infradead.org>.
29
* This file is subject to the terms and conditions of the GNU General Public
30
* License. See the file COPYING in the main directory of this archive for
34
#include <linux/module.h>
35
#include <linux/kernel.h>
36
#include <linux/errno.h>
37
#include <linux/string.h>
39
#include <linux/slab.h>
40
#include <linux/vmalloc.h>
41
#include <linux/delay.h>
42
#include <linux/interrupt.h>
44
#include <linux/of_address.h>
46
#include <linux/init.h>
47
#include <linux/pci.h>
48
#include <linux/nvram.h>
49
#include <linux/adb.h>
50
#include <linux/cuda.h>
53
#include <asm/pgtable.h>
54
#include <asm/btext.h>
57
#include "controlfb.h"
59
struct fb_par_control {
65
struct control_regvals regvals;
70
#define DIRTY(z) ((x)->z != (y)->z)
71
#define DIRTY_CMAP(z) (memcmp(&((x)->z), &((y)->z), sizeof((y)->z)))
72
static inline int PAR_EQUAL(struct fb_par_control *x, struct fb_par_control *y)
77
for (i = 0; i < 3; i++)
78
results &= !DIRTY(regvals.clock_params[i]);
81
for (i = 0; i < 16; i++)
82
results &= !DIRTY(regvals.regs[i]);
85
return (!DIRTY(cmode) && !DIRTY(xres) && !DIRTY(yres)
86
&& !DIRTY(vxres) && !DIRTY(vyres));
88
static inline int VAR_MATCH(struct fb_var_screeninfo *x, struct fb_var_screeninfo *y)
90
return (!DIRTY(bits_per_pixel) && !DIRTY(xres)
91
&& !DIRTY(yres) && !DIRTY(xres_virtual)
92
&& !DIRTY(yres_virtual)
93
&& !DIRTY_CMAP(red) && !DIRTY_CMAP(green) && !DIRTY_CMAP(blue));
96
struct fb_info_control {
98
struct fb_par_control par;
99
u32 pseudo_palette[16];
101
struct cmap_regs __iomem *cmap_regs;
102
unsigned long cmap_regs_phys;
104
struct control_regs __iomem *control_regs;
105
unsigned long control_regs_phys;
106
unsigned long control_regs_size;
108
__u8 __iomem *frame_buffer;
109
unsigned long frame_buffer_phys;
110
unsigned long fb_orig_base;
111
unsigned long fb_orig_size;
113
int control_use_bank2;
114
unsigned long total_vram;
115
unsigned char vram_attr;
118
/* control register access macro */
119
#define CNTRL_REG(INFO,REG) (&(((INFO)->control_regs->REG).r))
122
/******************** Prototypes for exported functions ********************/
126
static int controlfb_pan_display(struct fb_var_screeninfo *var,
127
struct fb_info *info);
128
static int controlfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
129
u_int transp, struct fb_info *info);
130
static int controlfb_blank(int blank_mode, struct fb_info *info);
131
static int controlfb_mmap(struct fb_info *info,
132
struct vm_area_struct *vma);
133
static int controlfb_set_par (struct fb_info *info);
134
static int controlfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);
136
/******************** Prototypes for internal functions **********************/
138
static void set_control_clock(unsigned char *params);
139
static int init_control(struct fb_info_control *p);
140
static void control_set_hardware(struct fb_info_control *p,
141
struct fb_par_control *par);
142
static int control_of_init(struct device_node *dp);
143
static void find_vram_size(struct fb_info_control *p);
144
static int read_control_sense(struct fb_info_control *p);
145
static int calc_clock_params(unsigned long clk, unsigned char *param);
146
static int control_var_to_par(struct fb_var_screeninfo *var,
147
struct fb_par_control *par, const struct fb_info *fb_info);
148
static inline void control_par_to_var(struct fb_par_control *par,
149
struct fb_var_screeninfo *var);
150
static void control_init_info(struct fb_info *info, struct fb_info_control *p);
151
static void control_cleanup(void);
154
/************************** Internal variables *******************************/
156
static struct fb_info_control *control_fb;
158
static int default_vmode __initdata = VMODE_NVRAM;
159
static int default_cmode __initdata = CMODE_NVRAM;
162
static struct fb_ops controlfb_ops = {
163
.owner = THIS_MODULE,
164
.fb_check_var = controlfb_check_var,
165
.fb_set_par = controlfb_set_par,
166
.fb_setcolreg = controlfb_setcolreg,
167
.fb_pan_display = controlfb_pan_display,
168
.fb_blank = controlfb_blank,
169
.fb_mmap = controlfb_mmap,
170
.fb_fillrect = cfb_fillrect,
171
.fb_copyarea = cfb_copyarea,
172
.fb_imageblit = cfb_imageblit,
176
/******************** The functions for controlfb_ops ********************/
179
MODULE_LICENSE("GPL");
181
int init_module(void)
183
struct device_node *dp;
186
dp = of_find_node_by_name(NULL, "control");
187
if (dp != 0 && !control_of_init(dp))
194
void cleanup_module(void)
201
* Checks a var structure
203
static int controlfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
205
struct fb_par_control par;
208
err = control_var_to_par(var, &par, info);
211
control_par_to_var(&par, var);
217
* Applies current var to display
219
static int controlfb_set_par (struct fb_info *info)
221
struct fb_info_control *p = (struct fb_info_control *) info;
222
struct fb_par_control par;
225
if((err = control_var_to_par(&info->var, &par, info))) {
226
printk (KERN_ERR "controlfb_set_par: error calling"
227
" control_var_to_par: %d.\n", err);
231
control_set_hardware(p, &par);
233
info->fix.visual = (p->par.cmode == CMODE_8) ?
234
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
235
info->fix.line_length = p->par.pitch;
236
info->fix.xpanstep = 32 >> p->par.cmode;
237
info->fix.ypanstep = 1;
243
* Set screen start address according to var offset values
245
static inline void set_screen_start(int xoffset, int yoffset,
246
struct fb_info_control *p)
248
struct fb_par_control *par = &p->par;
250
par->xoffset = xoffset;
251
par->yoffset = yoffset;
252
out_le32(CNTRL_REG(p,start_addr),
253
par->yoffset * par->pitch + (par->xoffset << par->cmode));
257
static int controlfb_pan_display(struct fb_var_screeninfo *var,
258
struct fb_info *info)
260
unsigned int xoffset, hstep;
261
struct fb_info_control *p = (struct fb_info_control *)info;
262
struct fb_par_control *par = &p->par;
265
* make sure start addr will be 32-byte aligned
267
hstep = 0x1f >> par->cmode;
268
xoffset = (var->xoffset + hstep) & ~hstep;
270
if (xoffset+par->xres > par->vxres ||
271
var->yoffset+par->yres > par->vyres)
274
set_screen_start(xoffset, var->yoffset, p);
281
* Private mmap since we want to have a different caching on the framebuffer
283
* Note there's no locking in here; it's done in fb_mmap() in fbmem.c.
285
static int controlfb_mmap(struct fb_info *info,
286
struct vm_area_struct *vma)
288
unsigned long off, start;
291
off = vma->vm_pgoff << PAGE_SHIFT;
293
/* frame buffer memory */
294
start = info->fix.smem_start;
295
len = PAGE_ALIGN((start & ~PAGE_MASK)+info->fix.smem_len);
297
/* memory mapped io */
299
if (info->var.accel_flags)
301
start = info->fix.mmio_start;
302
len = PAGE_ALIGN((start & ~PAGE_MASK)+info->fix.mmio_len);
303
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
306
vma->vm_page_prot = pgprot_cached_wthru(vma->vm_page_prot);
309
if ((vma->vm_end - vma->vm_start + off) > len)
312
vma->vm_pgoff = off >> PAGE_SHIFT;
313
if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
314
vma->vm_end - vma->vm_start, vma->vm_page_prot))
320
static int controlfb_blank(int blank_mode, struct fb_info *info)
322
struct fb_info_control *p = (struct fb_info_control *) info;
325
ctrl = ld_le32(CNTRL_REG(p,ctrl));
327
switch (blank_mode) {
328
case FB_BLANK_VSYNC_SUSPEND:
331
case FB_BLANK_HSYNC_SUSPEND:
334
case FB_BLANK_POWERDOWN:
337
case FB_BLANK_NORMAL:
347
out_le32(CNTRL_REG(p,ctrl), ctrl);
352
static int controlfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
353
u_int transp, struct fb_info *info)
355
struct fb_info_control *p = (struct fb_info_control *) info;
365
out_8(&p->cmap_regs->addr, regno); /* tell clut what addr to fill */
366
out_8(&p->cmap_regs->lut, r); /* send one color channel at */
367
out_8(&p->cmap_regs->lut, g); /* a time... */
368
out_8(&p->cmap_regs->lut, b);
372
switch (p->par.cmode) {
374
p->pseudo_palette[regno] =
375
(regno << 10) | (regno << 5) | regno;
378
i = (regno << 8) | regno;
379
p->pseudo_palette[regno] = (i << 16) | i;
388
/******************** End of controlfb_ops implementation ******************/
392
static void set_control_clock(unsigned char *params)
394
#ifdef CONFIG_ADB_CUDA
395
struct adb_request req;
398
for (i = 0; i < 3; ++i) {
399
cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC,
400
0x50, i + 1, params[i]);
401
while (!req.complete)
409
* finish off the driver initialization and register
411
static int __init init_control(struct fb_info_control *p)
413
int full, sense, vmode, cmode, vyres;
414
struct fb_var_screeninfo var;
417
printk(KERN_INFO "controlfb: ");
419
full = p->total_vram == 0x400000;
421
/* Try to pick a video mode out of NVRAM if we have one. */
423
if (default_cmode == CMODE_NVRAM){
424
cmode = nvram_read_byte(NV_CMODE);
425
if(cmode < CMODE_8 || cmode > CMODE_32)
431
if (default_vmode == VMODE_NVRAM) {
432
vmode = nvram_read_byte(NV_VMODE);
433
if (vmode < 1 || vmode > VMODE_MAX ||
434
control_mac_modes[vmode - 1].m[full] < cmode) {
435
sense = read_control_sense(p);
436
printk("Monitor sense value = 0x%x, ", sense);
437
vmode = mac_map_monitor_sense(sense);
438
if (control_mac_modes[vmode - 1].m[full] < cmode)
439
vmode = VMODE_640_480_60;
445
if (control_mac_modes[vmode - 1].m[full] < cmode) {
449
vmode = VMODE_640_480_60;
453
/* Initialize info structure */
454
control_init_info(&p->info, p);
456
/* Setup default var */
457
if (mac_vmode_to_var(vmode, cmode, &var) < 0) {
458
/* This shouldn't happen! */
459
printk("mac_vmode_to_var(%d, %d,) failed\n", vmode, cmode);
461
vmode = VMODE_640_480_60;
463
if (mac_vmode_to_var(vmode, cmode, &var) < 0) {
464
printk(KERN_ERR "controlfb: mac_vmode_to_var() failed\n");
467
printk(KERN_INFO "controlfb: ");
469
printk("using video mode %d and color mode %d.\n", vmode, cmode);
471
vyres = (p->total_vram - CTRLFB_OFF) / (var.xres << cmode);
472
if (vyres > var.yres)
473
var.yres_virtual = vyres;
475
/* Apply default var */
476
var.activate = FB_ACTIVATE_NOW;
477
rc = fb_set_var(&p->info, &var);
478
if (rc && (vmode != VMODE_640_480_60 || cmode != CMODE_8))
481
/* Register with fbdev layer */
482
if (register_framebuffer(&p->info) < 0)
485
printk(KERN_INFO "fb%d: control display adapter\n", p->info.node);
490
#define RADACAL_WRITE(a,d) \
491
out_8(&p->cmap_regs->addr, (a)); \
492
out_8(&p->cmap_regs->dat, (d))
494
/* Now how about actually saying, Make it so! */
495
/* Some things in here probably don't need to be done each time. */
496
static void control_set_hardware(struct fb_info_control *p, struct fb_par_control *par)
498
struct control_regvals *r;
499
volatile struct preg __iomem *rp;
502
if (PAR_EQUAL(&p->par, par)) {
504
* check if only xoffset or yoffset differs.
505
* this prevents flickers in typical VT switch case.
507
if (p->par.xoffset != par->xoffset ||
508
p->par.yoffset != par->yoffset)
509
set_screen_start(par->xoffset, par->yoffset, p);
515
cmode = p->par.cmode;
518
/* Turn off display */
519
out_le32(CNTRL_REG(p,ctrl), 0x400 | par->ctrl);
521
set_control_clock(r->clock_params);
523
RADACAL_WRITE(0x20, r->radacal_ctrl);
524
RADACAL_WRITE(0x21, p->control_use_bank2 ? 0 : 1);
525
RADACAL_WRITE(0x10, 0);
526
RADACAL_WRITE(0x11, 0);
528
rp = &p->control_regs->vswin;
529
for (i = 0; i < 16; ++i, ++rp)
530
out_le32(&rp->r, r->regs[i]);
532
out_le32(CNTRL_REG(p,pitch), par->pitch);
533
out_le32(CNTRL_REG(p,mode), r->mode);
534
out_le32(CNTRL_REG(p,vram_attr), p->vram_attr);
535
out_le32(CNTRL_REG(p,start_addr), par->yoffset * par->pitch
536
+ (par->xoffset << cmode));
537
out_le32(CNTRL_REG(p,rfrcnt), 0x1e5);
538
out_le32(CNTRL_REG(p,intr_ena), 0);
540
/* Turn on display */
541
out_le32(CNTRL_REG(p,ctrl), par->ctrl);
543
#ifdef CONFIG_BOOTX_TEXT
544
btext_update_display(p->frame_buffer_phys + CTRLFB_OFF,
545
p->par.xres, p->par.yres,
546
(cmode == CMODE_32? 32: cmode == CMODE_16? 16: 8),
548
#endif /* CONFIG_BOOTX_TEXT */
553
* Parse user specified options (`video=controlfb:')
555
static void __init control_setup(char *options)
559
if (!options || !*options)
562
while ((this_opt = strsep(&options, ",")) != NULL) {
563
if (!strncmp(this_opt, "vmode:", 6)) {
564
int vmode = simple_strtoul(this_opt+6, NULL, 0);
565
if (vmode > 0 && vmode <= VMODE_MAX &&
566
control_mac_modes[vmode - 1].m[1] >= 0)
567
default_vmode = vmode;
568
} else if (!strncmp(this_opt, "cmode:", 6)) {
569
int depth = simple_strtoul(this_opt+6, NULL, 0);
574
default_cmode = depth;
577
default_cmode = CMODE_8;
581
default_cmode = CMODE_16;
585
default_cmode = CMODE_32;
592
static int __init control_init(void)
594
struct device_node *dp;
598
if (fb_get_options("controlfb", &option))
600
control_setup(option);
602
dp = of_find_node_by_name(NULL, "control");
603
if (dp != 0 && !control_of_init(dp))
610
module_init(control_init);
612
/* Work out which banks of VRAM we have installed. */
613
/* danj: I guess the card just ignores writes to nonexistant VRAM... */
615
static void __init find_vram_size(struct fb_info_control *p)
620
* Set VRAM in 2MB (bank 1) mode
621
* VRAM Bank 2 will be accessible through offset 0x600000 if present
622
* and VRAM Bank 1 will not respond at that offset even if present
624
out_le32(CNTRL_REG(p,vram_attr), 0x31);
626
out_8(&p->frame_buffer[0x600000], 0xb3);
627
out_8(&p->frame_buffer[0x600001], 0x71);
628
asm volatile("eieio; dcbf 0,%0" : : "r" (&p->frame_buffer[0x600000])
631
asm volatile("eieio; dcbi 0,%0" : : "r" (&p->frame_buffer[0x600000])
635
bank2 = (in_8(&p->frame_buffer[0x600000]) == 0xb3)
636
&& (in_8(&p->frame_buffer[0x600001]) == 0x71);
639
* Set VRAM in 2MB (bank 2) mode
640
* VRAM Bank 1 will be accessible through offset 0x000000 if present
641
* and VRAM Bank 2 will not respond at that offset even if present
643
out_le32(CNTRL_REG(p,vram_attr), 0x39);
645
out_8(&p->frame_buffer[0], 0x5a);
646
out_8(&p->frame_buffer[1], 0xc7);
647
asm volatile("eieio; dcbf 0,%0" : : "r" (&p->frame_buffer[0])
650
asm volatile("eieio; dcbi 0,%0" : : "r" (&p->frame_buffer[0])
654
bank1 = (in_8(&p->frame_buffer[0]) == 0x5a)
655
&& (in_8(&p->frame_buffer[1]) == 0xc7);
662
p->control_use_bank2 = 1;
664
p->frame_buffer += 0x600000;
665
p->frame_buffer_phys += 0x600000;
679
p->total_vram = (bank1 + bank2) * 0x200000;
681
printk(KERN_INFO "controlfb: VRAM Total = %dMB "
682
"(%dMB @ bank 1, %dMB @ bank 2)\n",
683
(bank1 + bank2) << 1, bank1 << 1, bank2 << 1);
688
* find "control" and initialize
690
static int __init control_of_init(struct device_node *dp)
692
struct fb_info_control *p;
693
struct resource fb_res, reg_res;
696
printk(KERN_ERR "controlfb: only one control is supported\n");
700
if (of_pci_address_to_resource(dp, 2, &fb_res) ||
701
of_pci_address_to_resource(dp, 1, ®_res)) {
702
printk(KERN_ERR "can't get 2 addresses for control\n");
705
p = kzalloc(sizeof(*p), GFP_KERNEL);
708
control_fb = p; /* save it for cleanups */
710
/* Map in frame buffer and registers */
711
p->fb_orig_base = fb_res.start;
712
p->fb_orig_size = resource_size(&fb_res);
713
/* use the big-endian aperture (??) */
714
p->frame_buffer_phys = fb_res.start + 0x800000;
715
p->control_regs_phys = reg_res.start;
716
p->control_regs_size = resource_size(®_res);
718
if (!p->fb_orig_base ||
719
!request_mem_region(p->fb_orig_base,p->fb_orig_size,"controlfb")) {
723
/* map at most 8MB for the frame buffer */
724
p->frame_buffer = __ioremap(p->frame_buffer_phys, 0x800000,
727
if (!p->control_regs_phys ||
728
!request_mem_region(p->control_regs_phys, p->control_regs_size,
730
p->control_regs_phys = 0;
733
p->control_regs = ioremap(p->control_regs_phys, p->control_regs_size);
735
p->cmap_regs_phys = 0xf301b000; /* XXX not in prom? */
736
if (!request_mem_region(p->cmap_regs_phys, 0x1000, "controlfb cmap")) {
737
p->cmap_regs_phys = 0;
740
p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000);
742
if (!p->cmap_regs || !p->control_regs || !p->frame_buffer)
749
if (init_control(p) < 0)
760
* Get the monitor sense value.
761
* Note that this can be called before calibrate_delay,
762
* so we can't use udelay.
764
static int read_control_sense(struct fb_info_control *p)
768
out_le32(CNTRL_REG(p,mon_sense), 7); /* drive all lines high */
770
out_le32(CNTRL_REG(p,mon_sense), 077); /* turn off drivers */
772
sense = (in_le32(CNTRL_REG(p,mon_sense)) & 0x1c0) << 2;
774
/* drive each sense line low in turn and collect the other 2 */
775
out_le32(CNTRL_REG(p,mon_sense), 033); /* drive A low */
777
sense |= (in_le32(CNTRL_REG(p,mon_sense)) & 0xc0) >> 2;
778
out_le32(CNTRL_REG(p,mon_sense), 055); /* drive B low */
780
sense |= ((in_le32(CNTRL_REG(p,mon_sense)) & 0x100) >> 5)
781
| ((in_le32(CNTRL_REG(p,mon_sense)) & 0x40) >> 4);
782
out_le32(CNTRL_REG(p,mon_sense), 066); /* drive C low */
784
sense |= (in_le32(CNTRL_REG(p,mon_sense)) & 0x180) >> 7;
786
out_le32(CNTRL_REG(p,mon_sense), 077); /* turn off drivers */
791
/********************** Various translation functions **********************/
793
#define CONTROL_PIXCLOCK_BASE 256016
794
#define CONTROL_PIXCLOCK_MIN 5000 /* ~ 200 MHz dot clock */
797
* calculate the clock paramaters to be sent to CUDA according to given
798
* pixclock in pico second.
800
static int calc_clock_params(unsigned long clk, unsigned char *param)
802
unsigned long p0, p1, p2, k, l, m, n, min;
804
if (clk > (CONTROL_PIXCLOCK_BASE << 3))
807
p2 = ((clk << 4) < CONTROL_PIXCLOCK_BASE)? 3: 2;
811
for (k = 1, min = l; k < 32; k++) {
814
m = CONTROL_PIXCLOCK_BASE * k;
817
if (n && (n < 128) && rem < min) {
835
* This routine takes a user-supplied var, and picks the best vmode/cmode
839
static int control_var_to_par(struct fb_var_screeninfo *var,
840
struct fb_par_control *par, const struct fb_info *fb_info)
842
int cmode, piped_diff, hstep;
843
unsigned hperiod, hssync, hsblank, hesync, heblank, piped, heq, hlfln,
844
hserr, vperiod, vssync, vesync, veblank, vsblank, vswin, vewin;
845
unsigned long pixclock;
846
struct fb_info_control *p = (struct fb_info_control *) fb_info;
847
struct control_regvals *r = &par->regvals;
849
switch (var->bits_per_pixel) {
851
par->cmode = CMODE_8;
852
if (p->total_vram > 0x200000) {
854
r->radacal_ctrl = 0x20;
858
r->radacal_ctrl = 0x10;
864
par->cmode = CMODE_16;
865
if (p->total_vram > 0x200000) {
867
r->radacal_ctrl = 0x24;
871
r->radacal_ctrl = 0x14;
876
par->cmode = CMODE_32;
877
if (p->total_vram > 0x200000) {
879
r->radacal_ctrl = 0x28;
882
r->radacal_ctrl = 0x18;
891
* adjust xres and vxres so that the corresponding memory widths are
894
hstep = 31 >> par->cmode;
895
par->xres = (var->xres + hstep) & ~hstep;
896
par->vxres = (var->xres_virtual + hstep) & ~hstep;
897
par->xoffset = (var->xoffset + hstep) & ~hstep;
898
if (par->vxres < par->xres)
899
par->vxres = par->xres;
900
par->pitch = par->vxres << par->cmode;
902
par->yres = var->yres;
903
par->vyres = var->yres_virtual;
904
par->yoffset = var->yoffset;
905
if (par->vyres < par->yres)
906
par->vyres = par->yres;
908
par->sync = var->sync;
910
if (par->pitch * par->vyres + CTRLFB_OFF > p->total_vram)
913
if (par->xoffset + par->xres > par->vxres)
914
par->xoffset = par->vxres - par->xres;
915
if (par->yoffset + par->yres > par->vyres)
916
par->yoffset = par->vyres - par->yres;
918
pixclock = (var->pixclock < CONTROL_PIXCLOCK_MIN)? CONTROL_PIXCLOCK_MIN:
920
if (calc_clock_params(pixclock, r->clock_params))
923
hperiod = ((var->left_margin + par->xres + var->right_margin
924
+ var->hsync_len) >> 1) - 2;
925
hssync = hperiod + 1;
926
hsblank = hssync - (var->right_margin >> 1);
927
hesync = (var->hsync_len >> 1) - 1;
928
heblank = (var->left_margin >> 1) + hesync;
929
piped = heblank - piped_diff;
930
heq = var->hsync_len >> 2;
931
hlfln = (hperiod+2) >> 1;
932
hserr = hssync-hesync;
933
vperiod = (var->vsync_len + var->lower_margin + par->yres
934
+ var->upper_margin) << 1;
935
vssync = vperiod - 2;
936
vesync = (var->vsync_len << 1) - vperiod + vssync;
937
veblank = (var->upper_margin << 1) + vesync;
938
vsblank = vssync - (var->lower_margin << 1);
939
vswin = (vsblank+vssync) >> 1;
940
vewin = (vesync+veblank) >> 1;
943
r->regs[1] = vsblank;
944
r->regs[2] = veblank;
948
r->regs[6] = vperiod;
950
r->regs[8] = hperiod;
951
r->regs[9] = hsblank;
952
r->regs[10] = heblank;
953
r->regs[11] = hesync;
954
r->regs[12] = hssync;
959
if (par->xres >= 1280 && par->cmode >= CMODE_16)
964
if (mac_var_to_vmode(var, &par->vmode, &cmode))
972
* Convert hardware data in par to an fb_var_screeninfo
975
static void control_par_to_var(struct fb_par_control *par, struct fb_var_screeninfo *var)
977
struct control_regints *rv;
979
rv = (struct control_regints *) par->regvals.regs;
981
memset(var, 0, sizeof(*var));
982
var->xres = par->xres;
983
var->yres = par->yres;
984
var->xres_virtual = par->vxres;
985
var->yres_virtual = par->vyres;
986
var->xoffset = par->xoffset;
987
var->yoffset = par->yoffset;
992
var->bits_per_pixel = 8;
994
var->green.length = 8;
995
var->blue.length = 8;
997
case CMODE_16: /* RGB 555 */
998
var->bits_per_pixel = 16;
999
var->red.offset = 10;
1000
var->red.length = 5;
1001
var->green.offset = 5;
1002
var->green.length = 5;
1003
var->blue.length = 5;
1005
case CMODE_32: /* RGB 888 */
1006
var->bits_per_pixel = 32;
1007
var->red.offset = 16;
1008
var->red.length = 8;
1009
var->green.offset = 8;
1010
var->green.length = 8;
1011
var->blue.length = 8;
1012
var->transp.offset = 24;
1013
var->transp.length = 8;
1018
var->vmode = FB_VMODE_NONINTERLACED;
1020
var->left_margin = (rv->heblank - rv->hesync) << 1;
1021
var->right_margin = (rv->hssync - rv->hsblank) << 1;
1022
var->hsync_len = (rv->hperiod + 2 - rv->hssync + rv->hesync) << 1;
1024
var->upper_margin = (rv->veblank - rv->vesync) >> 1;
1025
var->lower_margin = (rv->vssync - rv->vsblank) >> 1;
1026
var->vsync_len = (rv->vperiod - rv->vssync + rv->vesync) >> 1;
1028
var->sync = par->sync;
1031
* 10^12 * clock_params[0] / (3906400 * clock_params[1]
1032
* * 2^clock_params[2])
1033
* (10^12 * clock_params[0] / (3906400 * clock_params[1]))
1034
* >> clock_params[2]
1036
/* (255990.17 * clock_params[0] / clock_params[1]) >> clock_params[2] */
1037
var->pixclock = CONTROL_PIXCLOCK_BASE * par->regvals.clock_params[0];
1038
var->pixclock /= par->regvals.clock_params[1];
1039
var->pixclock >>= par->regvals.clock_params[2];
1043
* Set misc info vars for this driver
1045
static void __init control_init_info(struct fb_info *info, struct fb_info_control *p)
1048
info->par = &p->par;
1049
info->fbops = &controlfb_ops;
1050
info->pseudo_palette = p->pseudo_palette;
1051
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
1052
info->screen_base = p->frame_buffer + CTRLFB_OFF;
1054
fb_alloc_cmap(&info->cmap, 256, 0);
1056
/* Fill fix common fields */
1057
strcpy(info->fix.id, "control");
1058
info->fix.mmio_start = p->control_regs_phys;
1059
info->fix.mmio_len = sizeof(struct control_regs);
1060
info->fix.type = FB_TYPE_PACKED_PIXELS;
1061
info->fix.smem_start = p->frame_buffer_phys + CTRLFB_OFF;
1062
info->fix.smem_len = p->total_vram - CTRLFB_OFF;
1063
info->fix.ywrapstep = 0;
1064
info->fix.type_aux = 0;
1065
info->fix.accel = FB_ACCEL_NONE;
1069
static void control_cleanup(void)
1071
struct fb_info_control *p = control_fb;
1077
iounmap(p->cmap_regs);
1078
if (p->control_regs)
1079
iounmap(p->control_regs);
1080
if (p->frame_buffer) {
1081
if (p->control_use_bank2)
1082
p->frame_buffer -= 0x600000;
1083
iounmap(p->frame_buffer);
1085
if (p->cmap_regs_phys)
1086
release_mem_region(p->cmap_regs_phys, 0x1000);
1087
if (p->control_regs_phys)
1088
release_mem_region(p->control_regs_phys, p->control_regs_size);
1089
if (p->fb_orig_base)
1090
release_mem_region(p->fb_orig_base, p->fb_orig_size);