2
* A framebuffer driver for VBE 2.0+ compliant video cards
4
* (c) 2007 Michal Januszewski <spock@gentoo.org>
5
* Loosely based upon the vesafb driver.
8
#include <linux/init.h>
9
#include <linux/module.h>
10
#include <linux/moduleparam.h>
11
#include <linux/skbuff.h>
12
#include <linux/timer.h>
13
#include <linux/completion.h>
14
#include <linux/connector.h>
15
#include <linux/random.h>
16
#include <linux/platform_device.h>
17
#include <linux/limits.h>
20
#include <linux/mutex.h>
21
#include <linux/slab.h>
22
#include <video/edid.h>
23
#include <video/uvesafb.h>
25
#include <video/vga.h>
32
static struct cb_id uvesafb_cn_id = {
34
.val = CN_VAL_V86D_UVESAFB
36
static char v86d_path[PATH_MAX] = "/sbin/v86d";
37
static char v86d_started; /* has v86d been started by uvesafb? */
39
static struct fb_fix_screeninfo uvesafb_fix __devinitdata = {
41
.type = FB_TYPE_PACKED_PIXELS,
42
.accel = FB_ACCEL_NONE,
43
.visual = FB_VISUAL_TRUECOLOR,
46
static int mtrr __devinitdata = 3; /* enable mtrr by default */
47
static int blank = 1; /* enable blanking by default */
48
static int ypan = 1; /* 0: scroll, 1: ypan, 2: ywrap */
49
static bool pmi_setpal __devinitdata = true; /* use PMI for palette changes */
50
static int nocrtc __devinitdata; /* ignore CRTC settings */
51
static int noedid __devinitdata; /* don't try DDC transfers */
52
static int vram_remap __devinitdata; /* set amt. of memory to be used */
53
static int vram_total __devinitdata; /* set total amount of memory */
54
static u16 maxclk __devinitdata; /* maximum pixel clock */
55
static u16 maxvf __devinitdata; /* maximum vertical frequency */
56
static u16 maxhf __devinitdata; /* maximum horizontal frequency */
57
static u16 vbemode __devinitdata; /* force use of a specific VBE mode */
58
static char *mode_option __devinitdata;
59
static u8 dac_width = 6;
61
static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX];
62
static DEFINE_MUTEX(uvfb_lock);
65
* A handler for replies from userspace.
67
* Make sure each message passes consistency checks and if it does,
68
* find the kernel part of the task struct, copy the registers and
69
* the buffer contents and then complete the task.
71
static void uvesafb_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
73
struct uvesafb_task *utask;
74
struct uvesafb_ktask *task;
76
if (!cap_raised(current_cap(), CAP_SYS_ADMIN))
79
if (msg->seq >= UVESAFB_TASKS_MAX)
82
mutex_lock(&uvfb_lock);
83
task = uvfb_tasks[msg->seq];
85
if (!task || msg->ack != task->ack) {
86
mutex_unlock(&uvfb_lock);
90
utask = (struct uvesafb_task *)msg->data;
92
/* Sanity checks for the buffer length. */
93
if (task->t.buf_len < utask->buf_len ||
94
utask->buf_len > msg->len - sizeof(*utask)) {
95
mutex_unlock(&uvfb_lock);
99
uvfb_tasks[msg->seq] = NULL;
100
mutex_unlock(&uvfb_lock);
102
memcpy(&task->t, utask, sizeof(*utask));
104
if (task->t.buf_len && task->buf)
105
memcpy(task->buf, utask + 1, task->t.buf_len);
107
complete(task->done);
111
static int uvesafb_helper_start(void)
124
return call_usermodehelper(v86d_path, argv, envp, 1);
128
* Execute a uvesafb task.
130
* Returns 0 if the task is executed successfully.
132
* A message sent to the userspace consists of the uvesafb_task
133
* struct and (optionally) a buffer. The uvesafb_task struct is
134
* a simplified version of uvesafb_ktask (its kernel counterpart)
135
* containing only the register values, flags and the length of
138
* Each message is assigned a sequence number (increased linearly)
139
* and a random ack number. The sequence number is used as a key
140
* for the uvfb_tasks array which holds pointers to uvesafb_ktask
141
* structs for all requests.
143
static int uvesafb_exec(struct uvesafb_ktask *task)
148
int len = sizeof(task->t) + task->t.buf_len;
151
* Check whether the message isn't longer than the maximum
152
* allowed by connector.
154
if (sizeof(*m) + len > CONNECTOR_MAX_MSG_SIZE) {
155
printk(KERN_WARNING "uvesafb: message too long (%d), "
156
"can't execute task\n", (int)(sizeof(*m) + len));
160
m = kzalloc(sizeof(*m) + len, GFP_KERNEL);
164
init_completion(task->done);
166
memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id));
171
/* uvesafb_task structure */
172
memcpy(m + 1, &task->t, sizeof(task->t));
175
memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len);
178
* Save the message ack number so that we can find the kernel
179
* part of this task when a reply is received from userspace.
183
mutex_lock(&uvfb_lock);
185
/* If all slots are taken -- bail out. */
186
if (uvfb_tasks[seq]) {
187
mutex_unlock(&uvfb_lock);
192
/* Save a pointer to the kernel part of the task struct. */
193
uvfb_tasks[seq] = task;
194
mutex_unlock(&uvfb_lock);
196
err = cn_netlink_send(m, 0, GFP_KERNEL);
199
* Try to start the userspace helper if sending
200
* the request failed the first time.
202
err = uvesafb_helper_start();
204
printk(KERN_ERR "uvesafb: failed to execute %s\n",
206
printk(KERN_ERR "uvesafb: make sure that the v86d "
207
"helper is installed and executable\n");
210
err = cn_netlink_send(m, 0, gfp_any());
214
} else if (err == -ENOBUFS)
217
if (!err && !(task->t.flags & TF_EXIT))
218
err = !wait_for_completion_timeout(task->done,
219
msecs_to_jiffies(UVESAFB_TIMEOUT));
221
mutex_lock(&uvfb_lock);
222
uvfb_tasks[seq] = NULL;
223
mutex_unlock(&uvfb_lock);
226
if (seq >= UVESAFB_TASKS_MAX)
234
* Free a uvesafb_ktask struct.
236
static void uvesafb_free(struct uvesafb_ktask *task)
246
* Prepare a uvesafb_ktask struct to be used again.
248
static void uvesafb_reset(struct uvesafb_ktask *task)
250
struct completion *cpl = task->done;
252
memset(task, 0, sizeof(*task));
257
* Allocate and prepare a uvesafb_ktask struct.
259
static struct uvesafb_ktask *uvesafb_prep(void)
261
struct uvesafb_ktask *task;
263
task = kzalloc(sizeof(*task), GFP_KERNEL);
265
task->done = kzalloc(sizeof(*task->done), GFP_KERNEL);
274
static void uvesafb_setup_var(struct fb_var_screeninfo *var,
275
struct fb_info *info, struct vbe_mode_ib *mode)
277
struct uvesafb_par *par = info->par;
279
var->vmode = FB_VMODE_NONINTERLACED;
280
var->sync = FB_SYNC_VERT_HIGH_ACT;
282
var->xres = mode->x_res;
283
var->yres = mode->y_res;
284
var->xres_virtual = mode->x_res;
285
var->yres_virtual = (par->ypan) ?
286
info->fix.smem_len / mode->bytes_per_scan_line :
290
var->bits_per_pixel = mode->bits_per_pixel;
292
if (var->bits_per_pixel == 15)
293
var->bits_per_pixel = 16;
295
if (var->bits_per_pixel > 8) {
296
var->red.offset = mode->red_off;
297
var->red.length = mode->red_len;
298
var->green.offset = mode->green_off;
299
var->green.length = mode->green_len;
300
var->blue.offset = mode->blue_off;
301
var->blue.length = mode->blue_len;
302
var->transp.offset = mode->rsvd_off;
303
var->transp.length = mode->rsvd_len;
306
var->green.offset = 0;
307
var->blue.offset = 0;
308
var->transp.offset = 0;
311
var->green.length = 8;
312
var->blue.length = 8;
313
var->transp.length = 0;
317
static int uvesafb_vbe_find_mode(struct uvesafb_par *par,
318
int xres, int yres, int depth, unsigned char flags)
320
int i, match = -1, h = 0, d = 0x7fffffff;
322
for (i = 0; i < par->vbe_modes_cnt; i++) {
323
h = abs(par->vbe_modes[i].x_res - xres) +
324
abs(par->vbe_modes[i].y_res - yres) +
325
abs(depth - par->vbe_modes[i].depth);
328
* We have an exact match in terms of resolution
334
if (h < d || (h == d && par->vbe_modes[i].depth > depth)) {
341
if (flags & UVESAFB_EXACT_DEPTH &&
342
par->vbe_modes[match].depth != depth)
345
if (flags & UVESAFB_EXACT_RES && d > 24)
354
static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par)
356
struct uvesafb_ktask *task;
360
if (!par->vbe_state_size)
363
state = kmalloc(par->vbe_state_size, GFP_KERNEL);
367
task = uvesafb_prep();
373
task->t.regs.eax = 0x4f04;
374
task->t.regs.ecx = 0x000f;
375
task->t.regs.edx = 0x0001;
376
task->t.flags = TF_BUF_RET | TF_BUF_ESBX;
377
task->t.buf_len = par->vbe_state_size;
379
err = uvesafb_exec(task);
381
if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
382
printk(KERN_WARNING "uvesafb: VBE get state call "
383
"failed (eax=0x%x, err=%d)\n",
384
task->t.regs.eax, err);
393
static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf)
395
struct uvesafb_ktask *task;
401
task = uvesafb_prep();
405
task->t.regs.eax = 0x4f04;
406
task->t.regs.ecx = 0x000f;
407
task->t.regs.edx = 0x0002;
408
task->t.buf_len = par->vbe_state_size;
409
task->t.flags = TF_BUF_ESBX;
410
task->buf = state_buf;
412
err = uvesafb_exec(task);
413
if (err || (task->t.regs.eax & 0xffff) != 0x004f)
414
printk(KERN_WARNING "uvesafb: VBE state restore call "
415
"failed (eax=0x%x, err=%d)\n",
416
task->t.regs.eax, err);
421
static int __devinit uvesafb_vbe_getinfo(struct uvesafb_ktask *task,
422
struct uvesafb_par *par)
426
task->t.regs.eax = 0x4f00;
427
task->t.flags = TF_VBEIB;
428
task->t.buf_len = sizeof(struct vbe_ib);
429
task->buf = &par->vbe_ib;
430
strncpy(par->vbe_ib.vbe_signature, "VBE2", 4);
432
err = uvesafb_exec(task);
433
if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
434
printk(KERN_ERR "uvesafb: Getting VBE info block failed "
435
"(eax=0x%x, err=%d)\n", (u32)task->t.regs.eax,
440
if (par->vbe_ib.vbe_version < 0x0200) {
441
printk(KERN_ERR "uvesafb: Sorry, pre-VBE 2.0 cards are "
446
if (!par->vbe_ib.mode_list_ptr) {
447
printk(KERN_ERR "uvesafb: Missing mode list!\n");
451
printk(KERN_INFO "uvesafb: ");
454
* Convert string pointers and the mode list pointer into
455
* usable addresses. Print informational messages about the
456
* video adapter and its vendor.
458
if (par->vbe_ib.oem_vendor_name_ptr)
460
((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr);
462
if (par->vbe_ib.oem_product_name_ptr)
464
((char *)task->buf) + par->vbe_ib.oem_product_name_ptr);
466
if (par->vbe_ib.oem_product_rev_ptr)
468
((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr);
470
if (par->vbe_ib.oem_string_ptr)
472
((char *)task->buf) + par->vbe_ib.oem_string_ptr);
474
printk("VBE v%d.%d\n", ((par->vbe_ib.vbe_version & 0xff00) >> 8),
475
par->vbe_ib.vbe_version & 0xff);
480
static int __devinit uvesafb_vbe_getmodes(struct uvesafb_ktask *task,
481
struct uvesafb_par *par)
486
par->vbe_modes_cnt = 0;
488
/* Count available modes. */
489
mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
490
while (*mode != 0xffff) {
491
par->vbe_modes_cnt++;
495
par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) *
496
par->vbe_modes_cnt, GFP_KERNEL);
500
/* Get info about all available modes. */
501
mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
502
while (*mode != 0xffff) {
503
struct vbe_mode_ib *mib;
506
task->t.regs.eax = 0x4f01;
507
task->t.regs.ecx = (u32) *mode;
508
task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
509
task->t.buf_len = sizeof(struct vbe_mode_ib);
510
task->buf = par->vbe_modes + off;
512
err = uvesafb_exec(task);
513
if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
514
printk(KERN_WARNING "uvesafb: Getting mode info block "
515
"for mode 0x%x failed (eax=0x%x, err=%d)\n",
516
*mode, (u32)task->t.regs.eax, err);
518
par->vbe_modes_cnt--;
523
mib->mode_id = *mode;
526
* We only want modes that are supported with the current
527
* hardware configuration, color, graphics and that have
528
* support for the LFB.
530
if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK &&
531
mib->bits_per_pixel >= 8)
534
par->vbe_modes_cnt--;
537
mib->depth = mib->red_len + mib->green_len + mib->blue_len;
540
* Handle 8bpp modes and modes with broken color component
543
if (mib->depth == 0 || (mib->depth == 24 &&
544
mib->bits_per_pixel == 32))
545
mib->depth = mib->bits_per_pixel;
548
if (par->vbe_modes_cnt > 0)
555
* The Protected Mode Interface is 32-bit x86 code, so we only run it on
556
* x86 and not x86_64.
559
static int __devinit uvesafb_vbe_getpmi(struct uvesafb_ktask *task,
560
struct uvesafb_par *par)
565
task->t.regs.eax = 0x4f0a;
566
task->t.regs.ebx = 0x0;
567
err = uvesafb_exec(task);
569
if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) {
570
par->pmi_setpal = par->ypan = 0;
572
par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4)
574
par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1];
575
par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2];
576
printk(KERN_INFO "uvesafb: protected mode interface info at "
578
(u16)task->t.regs.es, (u16)task->t.regs.edi);
579
printk(KERN_INFO "uvesafb: pmi: set display start = %p, "
580
"set palette = %p\n", par->pmi_start,
583
if (par->pmi_base[3]) {
584
printk(KERN_INFO "uvesafb: pmi: ports = ");
585
for (i = par->pmi_base[3]/2;
586
par->pmi_base[i] != 0xffff; i++)
587
printk("%x ", par->pmi_base[i]);
590
if (par->pmi_base[i] != 0xffff) {
591
printk(KERN_INFO "uvesafb: can't handle memory"
592
" requests, pmi disabled\n");
593
par->ypan = par->pmi_setpal = 0;
599
#endif /* CONFIG_X86_32 */
602
* Check whether a video mode is supported by the Video BIOS and is
603
* compatible with the monitor limits.
605
static int __devinit uvesafb_is_valid_mode(struct fb_videomode *mode,
606
struct fb_info *info)
608
if (info->monspecs.gtf) {
609
fb_videomode_to_var(&info->var, mode);
610
if (fb_validate_mode(&info->var, info))
614
if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8,
615
UVESAFB_EXACT_RES) == -1)
621
static int __devinit uvesafb_vbe_getedid(struct uvesafb_ktask *task,
622
struct fb_info *info)
624
struct uvesafb_par *par = info->par;
627
if (noedid || par->vbe_ib.vbe_version < 0x0300)
630
task->t.regs.eax = 0x4f15;
631
task->t.regs.ebx = 0;
632
task->t.regs.ecx = 0;
636
err = uvesafb_exec(task);
638
if ((task->t.regs.eax & 0xffff) != 0x004f || err)
641
if ((task->t.regs.ebx & 0x3) == 3) {
642
printk(KERN_INFO "uvesafb: VBIOS/hardware supports both "
643
"DDC1 and DDC2 transfers\n");
644
} else if ((task->t.regs.ebx & 0x3) == 2) {
645
printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC2 "
647
} else if ((task->t.regs.ebx & 0x3) == 1) {
648
printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC1 "
651
printk(KERN_INFO "uvesafb: VBIOS/hardware doesn't support "
656
task->t.regs.eax = 0x4f15;
657
task->t.regs.ebx = 1;
658
task->t.regs.ecx = task->t.regs.edx = 0;
659
task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
660
task->t.buf_len = EDID_LENGTH;
661
task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
663
err = uvesafb_exec(task);
665
if ((task->t.regs.eax & 0xffff) == 0x004f && !err) {
666
fb_edid_to_monspecs(task->buf, &info->monspecs);
668
if (info->monspecs.vfmax && info->monspecs.hfmax) {
670
* If the maximum pixel clock wasn't specified in
671
* the EDID block, set it to 300 MHz.
673
if (info->monspecs.dclkmax == 0)
674
info->monspecs.dclkmax = 300 * 1000000;
675
info->monspecs.gtf = 1;
685
static void __devinit uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task,
686
struct fb_info *info)
688
struct uvesafb_par *par = info->par;
691
memset(&info->monspecs, 0, sizeof(info->monspecs));
694
* If we don't get all necessary data from the EDID block,
695
* mark it as incompatible with the GTF and set nocrtc so
696
* that we always use the default BIOS refresh rate.
698
if (uvesafb_vbe_getedid(task, info)) {
699
info->monspecs.gtf = 0;
703
/* Kernel command line overrides. */
705
info->monspecs.dclkmax = maxclk * 1000000;
707
info->monspecs.vfmax = maxvf;
709
info->monspecs.hfmax = maxhf * 1000;
712
* In case DDC transfers are not supported, the user can provide
713
* monitor limits manually. Lower limits are set to "safe" values.
715
if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
716
info->monspecs.dclkmin = 0;
717
info->monspecs.vfmin = 60;
718
info->monspecs.hfmin = 29000;
719
info->monspecs.gtf = 1;
723
if (info->monspecs.gtf)
725
"uvesafb: monitor limits: vf = %d Hz, hf = %d kHz, "
726
"clk = %d MHz\n", info->monspecs.vfmax,
727
(int)(info->monspecs.hfmax / 1000),
728
(int)(info->monspecs.dclkmax / 1000000));
730
printk(KERN_INFO "uvesafb: no monitor limits have been set, "
731
"default refresh rate will be used\n");
733
/* Add VBE modes to the modelist. */
734
for (i = 0; i < par->vbe_modes_cnt; i++) {
735
struct fb_var_screeninfo var;
736
struct vbe_mode_ib *mode;
737
struct fb_videomode vmode;
739
mode = &par->vbe_modes[i];
740
memset(&var, 0, sizeof(var));
742
var.xres = mode->x_res;
743
var.yres = mode->y_res;
745
fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info);
746
fb_var_to_videomode(&vmode, &var);
747
fb_add_videomode(&vmode, &info->modelist);
750
/* Add valid VESA modes to our modelist. */
751
for (i = 0; i < VESA_MODEDB_SIZE; i++) {
752
if (uvesafb_is_valid_mode((struct fb_videomode *)
753
&vesa_modes[i], info))
754
fb_add_videomode(&vesa_modes[i], &info->modelist);
757
for (i = 0; i < info->monspecs.modedb_len; i++) {
758
if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info))
759
fb_add_videomode(&info->monspecs.modedb[i],
766
static void __devinit uvesafb_vbe_getstatesize(struct uvesafb_ktask *task,
767
struct uvesafb_par *par)
774
* Get the VBE state buffer size. We want all available
775
* hardware state data (CL = 0x0f).
777
task->t.regs.eax = 0x4f04;
778
task->t.regs.ecx = 0x000f;
779
task->t.regs.edx = 0x0000;
782
err = uvesafb_exec(task);
784
if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
785
printk(KERN_WARNING "uvesafb: VBE state buffer size "
786
"cannot be determined (eax=0x%x, err=%d)\n",
787
task->t.regs.eax, err);
788
par->vbe_state_size = 0;
792
par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff);
795
static int __devinit uvesafb_vbe_init(struct fb_info *info)
797
struct uvesafb_ktask *task = NULL;
798
struct uvesafb_par *par = info->par;
801
task = uvesafb_prep();
805
err = uvesafb_vbe_getinfo(task, par);
809
err = uvesafb_vbe_getmodes(task, par);
813
par->nocrtc = nocrtc;
815
par->pmi_setpal = pmi_setpal;
818
if (par->pmi_setpal || par->ypan)
819
uvesafb_vbe_getpmi(task, par);
821
/* The protected mode interface is not available on non-x86. */
822
par->pmi_setpal = par->ypan = 0;
825
INIT_LIST_HEAD(&info->modelist);
826
uvesafb_vbe_getmonspecs(task, info);
827
uvesafb_vbe_getstatesize(task, par);
829
out: uvesafb_free(task);
833
static int __devinit uvesafb_vbe_init_mode(struct fb_info *info)
835
struct list_head *pos;
836
struct fb_modelist *modelist;
837
struct fb_videomode *mode;
838
struct uvesafb_par *par = info->par;
841
/* Has the user requested a specific VESA mode? */
843
for (i = 0; i < par->vbe_modes_cnt; i++) {
844
if (par->vbe_modes[i].mode_id == vbemode) {
846
uvesafb_setup_var(&info->var, info,
847
&par->vbe_modes[modeid]);
848
fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
851
* With pixclock set to 0, the default BIOS
852
* timings will be used in set_par().
854
info->var.pixclock = 0;
858
printk(KERN_INFO "uvesafb: requested VBE mode 0x%x is "
859
"unavailable\n", vbemode);
863
/* Count the modes in the modelist */
865
list_for_each(pos, &info->modelist)
869
* Convert the modelist into a modedb so that we can use it with
872
mode = kzalloc(i * sizeof(*mode), GFP_KERNEL);
875
list_for_each(pos, &info->modelist) {
876
modelist = list_entry(pos, struct fb_modelist, list);
877
mode[i] = modelist->mode;
882
mode_option = UVESAFB_DEFAULT_MODE;
884
i = fb_find_mode(&info->var, info, mode_option, mode, i,
890
/* fb_find_mode() failed */
892
info->var.xres = 640;
893
info->var.yres = 480;
894
mode = (struct fb_videomode *)
895
fb_find_best_mode(&info->var, &info->modelist);
898
fb_videomode_to_var(&info->var, mode);
900
modeid = par->vbe_modes[0].mode_id;
901
uvesafb_setup_var(&info->var, info,
902
&par->vbe_modes[modeid]);
903
fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
910
/* Look for a matching VBE mode. */
911
modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres,
912
info->var.bits_per_pixel, UVESAFB_EXACT_RES);
917
uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]);
921
* If we are not VBE3.0+ compliant, we're done -- the BIOS will
922
* ignore our timings anyway.
924
if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc)
925
fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
931
static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count,
932
int start, struct fb_info *info)
934
struct uvesafb_ktask *task;
936
struct uvesafb_par *par = info->par;
937
int i = par->mode_idx;
942
* We support palette modifications for 8 bpp modes only, so
943
* there can never be more than 256 entries.
945
if (start + count > 256)
949
/* Use VGA registers if mode is VGA-compatible. */
950
if (i >= 0 && i < par->vbe_modes_cnt &&
951
par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
952
for (i = 0; i < count; i++) {
953
outb_p(start + i, dac_reg);
954
outb_p(entries[i].red, dac_val);
955
outb_p(entries[i].green, dac_val);
956
outb_p(entries[i].blue, dac_val);
960
else if (par->pmi_setpal) {
961
__asm__ __volatile__(
963
: /* no return value */
964
: "a" (0x4f09), /* EAX */
966
"c" (count), /* ECX */
967
"d" (start), /* EDX */
968
"D" (entries), /* EDI */
969
"S" (&par->pmi_pal)); /* ESI */
971
#endif /* CONFIG_X86_32 */
973
#endif /* CONFIG_X86 */
975
task = uvesafb_prep();
979
task->t.regs.eax = 0x4f09;
980
task->t.regs.ebx = 0x0;
981
task->t.regs.ecx = count;
982
task->t.regs.edx = start;
983
task->t.flags = TF_BUF_ESDI;
984
task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count;
987
err = uvesafb_exec(task);
988
if ((task->t.regs.eax & 0xffff) != 0x004f)
996
static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
997
unsigned blue, unsigned transp,
998
struct fb_info *info)
1000
struct uvesafb_pal_entry entry;
1001
int shift = 16 - dac_width;
1004
if (regno >= info->cmap.len)
1007
if (info->var.bits_per_pixel == 8) {
1008
entry.red = red >> shift;
1009
entry.green = green >> shift;
1010
entry.blue = blue >> shift;
1013
err = uvesafb_setpalette(&entry, 1, regno, info);
1014
} else if (regno < 16) {
1015
switch (info->var.bits_per_pixel) {
1017
if (info->var.red.offset == 10) {
1019
((u32 *) (info->pseudo_palette))[regno] =
1020
((red & 0xf800) >> 1) |
1021
((green & 0xf800) >> 6) |
1022
((blue & 0xf800) >> 11);
1025
((u32 *) (info->pseudo_palette))[regno] =
1027
((green & 0xfc00) >> 5) |
1028
((blue & 0xf800) >> 11);
1037
((u32 *)(info->pseudo_palette))[regno] =
1038
(red << info->var.red.offset) |
1039
(green << info->var.green.offset) |
1040
(blue << info->var.blue.offset);
1047
static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1049
struct uvesafb_pal_entry *entries;
1050
int shift = 16 - dac_width;
1053
if (info->var.bits_per_pixel == 8) {
1054
if (cmap->start + cmap->len > info->cmap.start +
1055
info->cmap.len || cmap->start < info->cmap.start)
1058
entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL);
1062
for (i = 0; i < cmap->len; i++) {
1063
entries[i].red = cmap->red[i] >> shift;
1064
entries[i].green = cmap->green[i] >> shift;
1065
entries[i].blue = cmap->blue[i] >> shift;
1068
err = uvesafb_setpalette(entries, cmap->len, cmap->start, info);
1072
* For modes with bpp > 8, we only set the pseudo palette in
1073
* the fb_info struct. We rely on uvesafb_setcolreg to do all
1076
for (i = 0; i < cmap->len; i++) {
1077
err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i],
1078
cmap->green[i], cmap->blue[i],
1085
static int uvesafb_pan_display(struct fb_var_screeninfo *var,
1086
struct fb_info *info)
1088
#ifdef CONFIG_X86_32
1090
struct uvesafb_par *par = info->par;
1092
offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
1095
* It turns out it's not the best idea to do panning via vm86,
1096
* so we only allow it if we have a PMI.
1098
if (par->pmi_start) {
1099
__asm__ __volatile__(
1101
: /* no return value */
1102
: "a" (0x4f07), /* EAX */
1104
"c" (offset), /* ECX */
1105
"d" (offset >> 16), /* EDX */
1106
"D" (&par->pmi_start)); /* EDI */
1112
static int uvesafb_blank(int blank, struct fb_info *info)
1114
struct uvesafb_ktask *task;
1117
struct uvesafb_par *par = info->par;
1119
if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
1121
u8 seq = 0, crtc17 = 0;
1123
if (blank == FB_BLANK_POWERDOWN) {
1130
err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
1133
vga_wseq(NULL, 0x00, 0x01);
1134
seq |= vga_rseq(NULL, 0x01) & ~0x20;
1135
vga_wseq(NULL, 0x00, seq);
1137
crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
1139
vga_wcrt(NULL, 0x17, crtc17);
1140
vga_wseq(NULL, 0x00, 0x03);
1142
#endif /* CONFIG_X86 */
1144
task = uvesafb_prep();
1148
task->t.regs.eax = 0x4f10;
1150
case FB_BLANK_UNBLANK:
1151
task->t.regs.ebx = 0x0001;
1153
case FB_BLANK_NORMAL:
1154
task->t.regs.ebx = 0x0101; /* standby */
1156
case FB_BLANK_POWERDOWN:
1157
task->t.regs.ebx = 0x0401; /* powerdown */
1163
err = uvesafb_exec(task);
1164
if (err || (task->t.regs.eax & 0xffff) != 0x004f)
1166
out: uvesafb_free(task);
1171
static int uvesafb_open(struct fb_info *info, int user)
1173
struct uvesafb_par *par = info->par;
1174
int cnt = atomic_read(&par->ref_count);
1176
if (!cnt && par->vbe_state_size)
1177
par->vbe_state_orig = uvesafb_vbe_state_save(par);
1179
atomic_inc(&par->ref_count);
1183
static int uvesafb_release(struct fb_info *info, int user)
1185
struct uvesafb_ktask *task = NULL;
1186
struct uvesafb_par *par = info->par;
1187
int cnt = atomic_read(&par->ref_count);
1195
task = uvesafb_prep();
1199
/* First, try to set the standard 80x25 text mode. */
1200
task->t.regs.eax = 0x0003;
1204
* Now try to restore whatever hardware state we might have
1205
* saved when the fb device was first opened.
1207
uvesafb_vbe_state_restore(par, par->vbe_state_orig);
1209
atomic_dec(&par->ref_count);
1215
static int uvesafb_set_par(struct fb_info *info)
1217
struct uvesafb_par *par = info->par;
1218
struct uvesafb_ktask *task = NULL;
1219
struct vbe_crtc_ib *crtc = NULL;
1220
struct vbe_mode_ib *mode = NULL;
1221
int i, err = 0, depth = info->var.bits_per_pixel;
1223
if (depth > 8 && depth != 32)
1224
depth = info->var.red.length + info->var.green.length +
1225
info->var.blue.length;
1227
i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
1228
UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
1230
mode = &par->vbe_modes[i];
1234
task = uvesafb_prep();
1238
task->t.regs.eax = 0x4f02;
1239
task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */
1241
if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
1242
info->var.pixclock != 0) {
1243
task->t.regs.ebx |= 0x0800; /* use CRTC data */
1244
task->t.flags = TF_BUF_ESDI;
1245
crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
1250
crtc->horiz_start = info->var.xres + info->var.right_margin;
1251
crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
1252
crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
1254
crtc->vert_start = info->var.yres + info->var.lower_margin;
1255
crtc->vert_end = crtc->vert_start + info->var.vsync_len;
1256
crtc->vert_total = crtc->vert_end + info->var.upper_margin;
1258
crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
1259
crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
1260
(crtc->vert_total * crtc->horiz_total)));
1262
if (info->var.vmode & FB_VMODE_DOUBLE)
1264
if (info->var.vmode & FB_VMODE_INTERLACED)
1266
if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
1268
if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
1270
memcpy(&par->crtc, crtc, sizeof(*crtc));
1272
memset(&par->crtc, 0, sizeof(*crtc));
1275
task->t.buf_len = sizeof(struct vbe_crtc_ib);
1276
task->buf = &par->crtc;
1278
err = uvesafb_exec(task);
1279
if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
1281
* The mode switch might have failed because we tried to
1282
* use our own timings. Try again with the default timings.
1285
printk(KERN_WARNING "uvesafb: mode switch failed "
1286
"(eax=0x%x, err=%d). Trying again with "
1287
"default timings.\n", task->t.regs.eax, err);
1288
uvesafb_reset(task);
1291
info->var.pixclock = 0;
1294
printk(KERN_ERR "uvesafb: mode switch failed (eax="
1295
"0x%x, err=%d)\n", task->t.regs.eax, err);
1302
/* For 8bpp modes, always try to set the DAC to 8 bits. */
1303
if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
1304
mode->bits_per_pixel <= 8) {
1305
uvesafb_reset(task);
1306
task->t.regs.eax = 0x4f08;
1307
task->t.regs.ebx = 0x0800;
1309
err = uvesafb_exec(task);
1310
if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
1311
((task->t.regs.ebx & 0xff00) >> 8) != 8) {
1318
info->fix.visual = (info->var.bits_per_pixel == 8) ?
1319
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1320
info->fix.line_length = mode->bytes_per_scan_line;
1322
out: if (crtc != NULL)
1329
static void uvesafb_check_limits(struct fb_var_screeninfo *var,
1330
struct fb_info *info)
1332
const struct fb_videomode *mode;
1333
struct uvesafb_par *par = info->par;
1336
* If pixclock is set to 0, then we're using default BIOS timings
1337
* and thus don't have to perform any checks here.
1342
if (par->vbe_ib.vbe_version < 0x0300) {
1343
fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
1347
if (!fb_validate_mode(var, info))
1350
mode = fb_find_best_mode(var, &info->modelist);
1352
if (mode->xres == var->xres && mode->yres == var->yres &&
1353
!(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
1354
fb_videomode_to_var(var, mode);
1359
if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
1361
/* Use default refresh rate */
1365
static int uvesafb_check_var(struct fb_var_screeninfo *var,
1366
struct fb_info *info)
1368
struct uvesafb_par *par = info->par;
1369
struct vbe_mode_ib *mode = NULL;
1371
int depth = var->red.length + var->green.length + var->blue.length;
1374
* Various apps will use bits_per_pixel to set the color depth,
1375
* which is theoretically incorrect, but which we'll try to handle
1378
if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
1379
depth = var->bits_per_pixel;
1381
match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth,
1386
mode = &par->vbe_modes[match];
1387
uvesafb_setup_var(var, info, mode);
1390
* Check whether we have remapped enough memory for this mode.
1391
* We might be called at an early stage, when we haven't remapped
1392
* any memory yet, in which case we simply skip the check.
1394
if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len
1395
&& info->fix.smem_len)
1398
if ((var->vmode & FB_VMODE_DOUBLE) &&
1399
!(par->vbe_modes[match].mode_attr & 0x100))
1400
var->vmode &= ~FB_VMODE_DOUBLE;
1402
if ((var->vmode & FB_VMODE_INTERLACED) &&
1403
!(par->vbe_modes[match].mode_attr & 0x200))
1404
var->vmode &= ~FB_VMODE_INTERLACED;
1406
uvesafb_check_limits(var, info);
1408
var->xres_virtual = var->xres;
1409
var->yres_virtual = (par->ypan) ?
1410
info->fix.smem_len / mode->bytes_per_scan_line :
1415
static struct fb_ops uvesafb_ops = {
1416
.owner = THIS_MODULE,
1417
.fb_open = uvesafb_open,
1418
.fb_release = uvesafb_release,
1419
.fb_setcolreg = uvesafb_setcolreg,
1420
.fb_setcmap = uvesafb_setcmap,
1421
.fb_pan_display = uvesafb_pan_display,
1422
.fb_blank = uvesafb_blank,
1423
.fb_fillrect = cfb_fillrect,
1424
.fb_copyarea = cfb_copyarea,
1425
.fb_imageblit = cfb_imageblit,
1426
.fb_check_var = uvesafb_check_var,
1427
.fb_set_par = uvesafb_set_par,
1430
static void __devinit uvesafb_init_info(struct fb_info *info,
1431
struct vbe_mode_ib *mode)
1433
unsigned int size_vmode;
1434
unsigned int size_remap;
1435
unsigned int size_total;
1436
struct uvesafb_par *par = info->par;
1439
info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
1440
info->fix = uvesafb_fix;
1441
info->fix.ypanstep = par->ypan ? 1 : 0;
1442
info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
1444
/* Disable blanking if the user requested so. */
1446
info->fbops->fb_blank = NULL;
1449
* Find out how much IO memory is required for the mode with
1450
* the highest resolution.
1453
for (i = 0; i < par->vbe_modes_cnt; i++) {
1454
h = par->vbe_modes[i].bytes_per_scan_line *
1455
par->vbe_modes[i].y_res;
1462
* size_vmode -- that is the amount of memory needed for the
1463
* used video mode, i.e. the minimum amount of
1467
size_vmode = info->var.yres * mode->bytes_per_scan_line;
1469
size_vmode = info->var.yres * info->var.xres *
1470
((info->var.bits_per_pixel + 7) >> 3);
1474
* size_total -- all video memory we have. Used for mtrr
1475
* entries, resource allocation and bounds
1478
size_total = par->vbe_ib.total_memory * 65536;
1480
size_total = vram_total * 1024 * 1024;
1481
if (size_total < size_vmode)
1482
size_total = size_vmode;
1485
* size_remap -- the amount of video memory we are going to
1486
* use for vesafb. With modern cards it is no
1487
* option to simply use size_total as th
1488
* wastes plenty of kernel address space.
1491
size_remap = vram_remap * 1024 * 1024;
1492
if (size_remap < size_vmode)
1493
size_remap = size_vmode;
1494
if (size_remap > size_total)
1495
size_remap = size_total;
1497
info->fix.smem_len = size_remap;
1498
info->fix.smem_start = mode->phys_base_ptr;
1501
* We have to set yres_virtual here because when setup_var() was
1502
* called, smem_len wasn't defined yet.
1504
info->var.yres_virtual = info->fix.smem_len /
1505
mode->bytes_per_scan_line;
1507
if (par->ypan && info->var.yres_virtual > info->var.yres) {
1508
printk(KERN_INFO "uvesafb: scrolling: %s "
1509
"using protected mode interface, "
1510
"yres_virtual=%d\n",
1511
(par->ypan > 1) ? "ywrap" : "ypan",
1512
info->var.yres_virtual);
1514
printk(KERN_INFO "uvesafb: scrolling: redraw\n");
1515
info->var.yres_virtual = info->var.yres;
1519
info->flags = FBINFO_FLAG_DEFAULT |
1520
(par->ypan ? FBINFO_HWACCEL_YPAN : 0);
1523
info->fbops->fb_pan_display = NULL;
1526
static void __devinit uvesafb_init_mtrr(struct fb_info *info)
1529
if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
1530
int temp_size = info->fix.smem_len;
1531
unsigned int type = 0;
1535
type = MTRR_TYPE_UNCACHABLE;
1538
type = MTRR_TYPE_WRBACK;
1541
type = MTRR_TYPE_WRCOMB;
1544
type = MTRR_TYPE_WRTHROUGH;
1554
/* Find the largest power-of-two */
1555
temp_size = roundup_pow_of_two(temp_size);
1557
/* Try and find a power of two to add */
1559
rc = mtrr_add(info->fix.smem_start,
1560
temp_size, type, 1);
1562
} while (temp_size >= PAGE_SIZE && rc == -EINVAL);
1565
#endif /* CONFIG_MTRR */
1568
static void __devinit uvesafb_ioremap(struct fb_info *info)
1572
case 1: /* uncachable */
1573
info->screen_base = ioremap_nocache(info->fix.smem_start, info->fix.smem_len);
1575
case 2: /* write-back */
1576
info->screen_base = ioremap_cache(info->fix.smem_start, info->fix.smem_len);
1578
case 3: /* write-combining */
1579
info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len);
1581
case 4: /* write-through */
1583
info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1587
info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1588
#endif /* CONFIG_X86 */
1591
static ssize_t uvesafb_show_vbe_ver(struct device *dev,
1592
struct device_attribute *attr, char *buf)
1594
struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1595
struct uvesafb_par *par = info->par;
1597
return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
1600
static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
1602
static ssize_t uvesafb_show_vbe_modes(struct device *dev,
1603
struct device_attribute *attr, char *buf)
1605
struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1606
struct uvesafb_par *par = info->par;
1609
for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
1610
ret += snprintf(buf + ret, PAGE_SIZE - ret,
1611
"%dx%d-%d, 0x%.4x\n",
1612
par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
1613
par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
1619
static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
1621
static ssize_t uvesafb_show_vendor(struct device *dev,
1622
struct device_attribute *attr, char *buf)
1624
struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1625
struct uvesafb_par *par = info->par;
1627
if (par->vbe_ib.oem_vendor_name_ptr)
1628
return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1629
(&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
1634
static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
1636
static ssize_t uvesafb_show_product_name(struct device *dev,
1637
struct device_attribute *attr, char *buf)
1639
struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1640
struct uvesafb_par *par = info->par;
1642
if (par->vbe_ib.oem_product_name_ptr)
1643
return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1644
(&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
1649
static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
1651
static ssize_t uvesafb_show_product_rev(struct device *dev,
1652
struct device_attribute *attr, char *buf)
1654
struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1655
struct uvesafb_par *par = info->par;
1657
if (par->vbe_ib.oem_product_rev_ptr)
1658
return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1659
(&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
1664
static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
1666
static ssize_t uvesafb_show_oem_string(struct device *dev,
1667
struct device_attribute *attr, char *buf)
1669
struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1670
struct uvesafb_par *par = info->par;
1672
if (par->vbe_ib.oem_string_ptr)
1673
return snprintf(buf, PAGE_SIZE, "%s\n",
1674
(char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
1679
static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
1681
static ssize_t uvesafb_show_nocrtc(struct device *dev,
1682
struct device_attribute *attr, char *buf)
1684
struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1685
struct uvesafb_par *par = info->par;
1687
return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
1690
static ssize_t uvesafb_store_nocrtc(struct device *dev,
1691
struct device_attribute *attr, const char *buf, size_t count)
1693
struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1694
struct uvesafb_par *par = info->par;
1705
static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
1706
uvesafb_store_nocrtc);
1708
static struct attribute *uvesafb_dev_attrs[] = {
1709
&dev_attr_vbe_version.attr,
1710
&dev_attr_vbe_modes.attr,
1711
&dev_attr_oem_vendor.attr,
1712
&dev_attr_oem_product_name.attr,
1713
&dev_attr_oem_product_rev.attr,
1714
&dev_attr_oem_string.attr,
1715
&dev_attr_nocrtc.attr,
1719
static struct attribute_group uvesafb_dev_attgrp = {
1721
.attrs = uvesafb_dev_attrs,
1724
static int __devinit uvesafb_probe(struct platform_device *dev)
1726
struct fb_info *info;
1727
struct vbe_mode_ib *mode = NULL;
1728
struct uvesafb_par *par;
1731
info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev);
1737
err = uvesafb_vbe_init(info);
1739
printk(KERN_ERR "uvesafb: vbe_init() failed with %d\n", err);
1743
info->fbops = &uvesafb_ops;
1745
i = uvesafb_vbe_init_mode(info);
1750
mode = &par->vbe_modes[i];
1753
if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
1758
uvesafb_init_info(info, mode);
1760
if (!request_region(0x3c0, 32, "uvesafb")) {
1761
printk(KERN_ERR "uvesafb: request region 0x3c0-0x3e0 failed\n");
1766
if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
1768
printk(KERN_ERR "uvesafb: cannot reserve video memory at "
1769
"0x%lx\n", info->fix.smem_start);
1774
uvesafb_init_mtrr(info);
1775
uvesafb_ioremap(info);
1777
if (!info->screen_base) {
1779
"uvesafb: abort, cannot ioremap 0x%x bytes of video "
1780
"memory at 0x%lx\n",
1781
info->fix.smem_len, info->fix.smem_start);
1786
platform_set_drvdata(dev, info);
1788
if (register_framebuffer(info) < 0) {
1790
"uvesafb: failed to register framebuffer device\n");
1795
printk(KERN_INFO "uvesafb: framebuffer at 0x%lx, mapped to 0x%p, "
1796
"using %dk, total %dk\n", info->fix.smem_start,
1797
info->screen_base, info->fix.smem_len/1024,
1798
par->vbe_ib.total_memory * 64);
1799
printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
1802
err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1804
printk(KERN_WARNING "fb%d: failed to register attributes\n",
1810
iounmap(info->screen_base);
1812
release_mem_region(info->fix.smem_start, info->fix.smem_len);
1814
release_region(0x3c0, 32);
1816
if (!list_empty(&info->modelist))
1817
fb_destroy_modelist(&info->modelist);
1818
fb_destroy_modedb(info->monspecs.modedb);
1819
fb_dealloc_cmap(&info->cmap);
1822
kfree(par->vbe_modes);
1824
framebuffer_release(info);
1828
static int uvesafb_remove(struct platform_device *dev)
1830
struct fb_info *info = platform_get_drvdata(dev);
1833
struct uvesafb_par *par = info->par;
1835
sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1836
unregister_framebuffer(info);
1837
release_region(0x3c0, 32);
1838
iounmap(info->screen_base);
1839
release_mem_region(info->fix.smem_start, info->fix.smem_len);
1840
fb_destroy_modedb(info->monspecs.modedb);
1841
fb_dealloc_cmap(&info->cmap);
1845
kfree(par->vbe_modes);
1846
if (par->vbe_state_orig)
1847
kfree(par->vbe_state_orig);
1848
if (par->vbe_state_saved)
1849
kfree(par->vbe_state_saved);
1852
framebuffer_release(info);
1857
static struct platform_driver uvesafb_driver = {
1858
.probe = uvesafb_probe,
1859
.remove = uvesafb_remove,
1865
static struct platform_device *uvesafb_device;
1868
static int __devinit uvesafb_setup(char *options)
1872
if (!options || !*options)
1875
while ((this_opt = strsep(&options, ",")) != NULL) {
1876
if (!*this_opt) continue;
1878
if (!strcmp(this_opt, "redraw"))
1880
else if (!strcmp(this_opt, "ypan"))
1882
else if (!strcmp(this_opt, "ywrap"))
1884
else if (!strcmp(this_opt, "vgapal"))
1886
else if (!strcmp(this_opt, "pmipal"))
1888
else if (!strncmp(this_opt, "mtrr:", 5))
1889
mtrr = simple_strtoul(this_opt+5, NULL, 0);
1890
else if (!strcmp(this_opt, "nomtrr"))
1892
else if (!strcmp(this_opt, "nocrtc"))
1894
else if (!strcmp(this_opt, "noedid"))
1896
else if (!strcmp(this_opt, "noblank"))
1898
else if (!strncmp(this_opt, "vtotal:", 7))
1899
vram_total = simple_strtoul(this_opt + 7, NULL, 0);
1900
else if (!strncmp(this_opt, "vremap:", 7))
1901
vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
1902
else if (!strncmp(this_opt, "maxhf:", 6))
1903
maxhf = simple_strtoul(this_opt + 6, NULL, 0);
1904
else if (!strncmp(this_opt, "maxvf:", 6))
1905
maxvf = simple_strtoul(this_opt + 6, NULL, 0);
1906
else if (!strncmp(this_opt, "maxclk:", 7))
1907
maxclk = simple_strtoul(this_opt + 7, NULL, 0);
1908
else if (!strncmp(this_opt, "vbemode:", 8))
1909
vbemode = simple_strtoul(this_opt + 8, NULL, 0);
1910
else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
1911
mode_option = this_opt;
1914
"uvesafb: unrecognized option %s\n", this_opt);
1920
#endif /* !MODULE */
1922
static ssize_t show_v86d(struct device_driver *dev, char *buf)
1924
return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
1927
static ssize_t store_v86d(struct device_driver *dev, const char *buf,
1930
strncpy(v86d_path, buf, PATH_MAX);
1934
static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d);
1936
static int __devinit uvesafb_init(void)
1941
char *option = NULL;
1943
if (fb_get_options("uvesafb", &option))
1945
uvesafb_setup(option);
1947
err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
1951
err = platform_driver_register(&uvesafb_driver);
1954
uvesafb_device = platform_device_alloc("uvesafb", 0);
1956
err = platform_device_add(uvesafb_device);
1961
platform_device_put(uvesafb_device);
1962
platform_driver_unregister(&uvesafb_driver);
1963
cn_del_callback(&uvesafb_cn_id);
1967
err = driver_create_file(&uvesafb_driver.driver,
1970
printk(KERN_WARNING "uvesafb: failed to register "
1978
module_init(uvesafb_init);
1980
static void __devexit uvesafb_exit(void)
1982
struct uvesafb_ktask *task;
1985
task = uvesafb_prep();
1987
task->t.flags = TF_EXIT;
1993
cn_del_callback(&uvesafb_cn_id);
1994
driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
1995
platform_device_unregister(uvesafb_device);
1996
platform_driver_unregister(&uvesafb_driver);
1999
module_exit(uvesafb_exit);
2001
static int param_set_scroll(const char *val, const struct kernel_param *kp)
2005
if (!strcmp(val, "redraw"))
2007
else if (!strcmp(val, "ypan"))
2009
else if (!strcmp(val, "ywrap"))
2016
static struct kernel_param_ops param_ops_scroll = {
2017
.set = param_set_scroll,
2019
#define param_check_scroll(name, p) __param_check(name, p, void)
2021
module_param_named(scroll, ypan, scroll, 0);
2022
MODULE_PARM_DESC(scroll,
2023
"Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'");
2024
module_param_named(vgapal, pmi_setpal, invbool, 0);
2025
MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
2026
module_param_named(pmipal, pmi_setpal, bool, 0);
2027
MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
2028
module_param(mtrr, uint, 0);
2029
MODULE_PARM_DESC(mtrr,
2030
"Memory Type Range Registers setting. Use 0 to disable.");
2031
module_param(blank, bool, 0);
2032
MODULE_PARM_DESC(blank, "Enable hardware blanking");
2033
module_param(nocrtc, bool, 0);
2034
MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
2035
module_param(noedid, bool, 0);
2036
MODULE_PARM_DESC(noedid,
2037
"Ignore EDID-provided monitor limits when setting modes");
2038
module_param(vram_remap, uint, 0);
2039
MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
2040
module_param(vram_total, uint, 0);
2041
MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
2042
module_param(maxclk, ushort, 0);
2043
MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
2044
module_param(maxhf, ushort, 0);
2045
MODULE_PARM_DESC(maxhf,
2046
"Maximum horizontal frequency [kHz], overrides EDID data");
2047
module_param(maxvf, ushort, 0);
2048
MODULE_PARM_DESC(maxvf,
2049
"Maximum vertical frequency [Hz], overrides EDID data");
2050
module_param(mode_option, charp, 0);
2051
MODULE_PARM_DESC(mode_option,
2052
"Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
2053
module_param(vbemode, ushort, 0);
2054
MODULE_PARM_DESC(vbemode,
2055
"VBE mode number to set, overrides the 'mode' option");
2056
module_param_string(v86d, v86d_path, PATH_MAX, 0660);
2057
MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
2059
MODULE_LICENSE("GPL");
2060
MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>");
2061
MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");