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.
9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11 #include <linux/init.h>
12 #include <linux/module.h>
13 #include <linux/moduleparam.h>
14 #include <linux/skbuff.h>
15 #include <linux/timer.h>
16 #include <linux/completion.h>
17 #include <linux/connector.h>
18 #include <linux/random.h>
19 #include <linux/platform_device.h>
20 #include <linux/limits.h>
23 #include <linux/mutex.h>
24 #include <linux/slab.h>
25 #include <video/edid.h>
26 #include <video/uvesafb.h>
28 #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 const struct fb_fix_screeninfo uvesafb_fix = {
41 .type = FB_TYPE_PACKED_PIXELS,
42 .accel = FB_ACCEL_NONE,
43 .visual = FB_VISUAL_TRUECOLOR,
46 static int mtrr = 3; /* enable mtrr by default */
47 static bool blank = 1; /* enable blanking by default */
48 static int ypan = 1; /* 0: scroll, 1: ypan, 2: ywrap */
49 static bool pmi_setpal = true; /* use PMI for palette changes */
50 static bool nocrtc; /* ignore CRTC settings */
51 static bool noedid; /* don't try DDC transfers */
52 static int vram_remap; /* set amt. of memory to be used */
53 static int vram_total; /* set total amount of memory */
54 static u16 maxclk; /* maximum pixel clock */
55 static u16 maxvf; /* maximum vertical frequency */
56 static u16 maxhf; /* maximum horizontal frequency */
57 static u16 vbemode; /* force use of a specific VBE mode */
58 static char *mode_option;
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 (!capable(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, UMH_WAIT_PROC);
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 pr_warn("message too long (%d), can't execute task\n",
156 (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));
169 m->ack = prandom_u32();
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, 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 pr_err("failed to execute %s\n", v86d_path);
205 pr_err("make sure that the v86d helper is installed and executable\n");
208 err = cn_netlink_send(m, 0, 0, gfp_any());
212 } else if (err == -ENOBUFS)
215 if (!err && !(task->t.flags & TF_EXIT))
216 err = !wait_for_completion_timeout(task->done,
217 msecs_to_jiffies(UVESAFB_TIMEOUT));
219 mutex_lock(&uvfb_lock);
220 uvfb_tasks[seq] = NULL;
221 mutex_unlock(&uvfb_lock);
224 if (seq >= UVESAFB_TASKS_MAX)
232 * Free a uvesafb_ktask struct.
234 static void uvesafb_free(struct uvesafb_ktask *task)
243 * Prepare a uvesafb_ktask struct to be used again.
245 static void uvesafb_reset(struct uvesafb_ktask *task)
247 struct completion *cpl = task->done;
249 memset(task, 0, sizeof(*task));
254 * Allocate and prepare a uvesafb_ktask struct.
256 static struct uvesafb_ktask *uvesafb_prep(void)
258 struct uvesafb_ktask *task;
260 task = kzalloc(sizeof(*task), GFP_KERNEL);
262 task->done = kzalloc(sizeof(*task->done), GFP_KERNEL);
271 static void uvesafb_setup_var(struct fb_var_screeninfo *var,
272 struct fb_info *info, struct vbe_mode_ib *mode)
274 struct uvesafb_par *par = info->par;
276 var->vmode = FB_VMODE_NONINTERLACED;
277 var->sync = FB_SYNC_VERT_HIGH_ACT;
279 var->xres = mode->x_res;
280 var->yres = mode->y_res;
281 var->xres_virtual = mode->x_res;
282 var->yres_virtual = (par->ypan) ?
283 info->fix.smem_len / mode->bytes_per_scan_line :
287 var->bits_per_pixel = mode->bits_per_pixel;
289 if (var->bits_per_pixel == 15)
290 var->bits_per_pixel = 16;
292 if (var->bits_per_pixel > 8) {
293 var->red.offset = mode->red_off;
294 var->red.length = mode->red_len;
295 var->green.offset = mode->green_off;
296 var->green.length = mode->green_len;
297 var->blue.offset = mode->blue_off;
298 var->blue.length = mode->blue_len;
299 var->transp.offset = mode->rsvd_off;
300 var->transp.length = mode->rsvd_len;
303 var->green.offset = 0;
304 var->blue.offset = 0;
305 var->transp.offset = 0;
308 var->green.length = 8;
309 var->blue.length = 8;
310 var->transp.length = 0;
314 static int uvesafb_vbe_find_mode(struct uvesafb_par *par,
315 int xres, int yres, int depth, unsigned char flags)
317 int i, match = -1, h = 0, d = 0x7fffffff;
319 for (i = 0; i < par->vbe_modes_cnt; i++) {
320 h = abs(par->vbe_modes[i].x_res - xres) +
321 abs(par->vbe_modes[i].y_res - yres) +
322 abs(depth - par->vbe_modes[i].depth);
325 * We have an exact match in terms of resolution
331 if (h < d || (h == d && par->vbe_modes[i].depth > depth)) {
338 if (flags & UVESAFB_EXACT_DEPTH &&
339 par->vbe_modes[match].depth != depth)
342 if (flags & UVESAFB_EXACT_RES && d > 24)
351 static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par)
353 struct uvesafb_ktask *task;
357 if (!par->vbe_state_size)
360 state = kmalloc(par->vbe_state_size, GFP_KERNEL);
362 return ERR_PTR(-ENOMEM);
364 task = uvesafb_prep();
370 task->t.regs.eax = 0x4f04;
371 task->t.regs.ecx = 0x000f;
372 task->t.regs.edx = 0x0001;
373 task->t.flags = TF_BUF_RET | TF_BUF_ESBX;
374 task->t.buf_len = par->vbe_state_size;
376 err = uvesafb_exec(task);
378 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
379 pr_warn("VBE get state call failed (eax=0x%x, err=%d)\n",
380 task->t.regs.eax, err);
389 static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf)
391 struct uvesafb_ktask *task;
397 task = uvesafb_prep();
401 task->t.regs.eax = 0x4f04;
402 task->t.regs.ecx = 0x000f;
403 task->t.regs.edx = 0x0002;
404 task->t.buf_len = par->vbe_state_size;
405 task->t.flags = TF_BUF_ESBX;
406 task->buf = state_buf;
408 err = uvesafb_exec(task);
409 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
410 pr_warn("VBE state restore call failed (eax=0x%x, err=%d)\n",
411 task->t.regs.eax, err);
416 static int uvesafb_vbe_getinfo(struct uvesafb_ktask *task,
417 struct uvesafb_par *par)
421 task->t.regs.eax = 0x4f00;
422 task->t.flags = TF_VBEIB;
423 task->t.buf_len = sizeof(struct vbe_ib);
424 task->buf = &par->vbe_ib;
425 strncpy(par->vbe_ib.vbe_signature, "VBE2", 4);
427 err = uvesafb_exec(task);
428 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
429 pr_err("Getting VBE info block failed (eax=0x%x, err=%d)\n",
430 (u32)task->t.regs.eax, err);
434 if (par->vbe_ib.vbe_version < 0x0200) {
435 pr_err("Sorry, pre-VBE 2.0 cards are not supported\n");
439 if (!par->vbe_ib.mode_list_ptr) {
440 pr_err("Missing mode list!\n");
447 * Convert string pointers and the mode list pointer into
448 * usable addresses. Print informational messages about the
449 * video adapter and its vendor.
451 if (par->vbe_ib.oem_vendor_name_ptr)
453 ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr);
455 if (par->vbe_ib.oem_product_name_ptr)
457 ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr);
459 if (par->vbe_ib.oem_product_rev_ptr)
461 ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr);
463 if (par->vbe_ib.oem_string_ptr)
465 ((char *)task->buf) + par->vbe_ib.oem_string_ptr);
467 pr_cont("VBE v%d.%d\n",
468 (par->vbe_ib.vbe_version & 0xff00) >> 8,
469 par->vbe_ib.vbe_version & 0xff);
474 static int uvesafb_vbe_getmodes(struct uvesafb_ktask *task,
475 struct uvesafb_par *par)
480 par->vbe_modes_cnt = 0;
482 /* Count available modes. */
483 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
484 while (*mode != 0xffff) {
485 par->vbe_modes_cnt++;
489 par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) *
490 par->vbe_modes_cnt, GFP_KERNEL);
494 /* Get info about all available modes. */
495 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
496 while (*mode != 0xffff) {
497 struct vbe_mode_ib *mib;
500 task->t.regs.eax = 0x4f01;
501 task->t.regs.ecx = (u32) *mode;
502 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
503 task->t.buf_len = sizeof(struct vbe_mode_ib);
504 task->buf = par->vbe_modes + off;
506 err = uvesafb_exec(task);
507 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
508 pr_warn("Getting mode info block for mode 0x%x failed (eax=0x%x, err=%d)\n",
509 *mode, (u32)task->t.regs.eax, err);
511 par->vbe_modes_cnt--;
516 mib->mode_id = *mode;
519 * We only want modes that are supported with the current
520 * hardware configuration, color, graphics and that have
521 * support for the LFB.
523 if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK &&
524 mib->bits_per_pixel >= 8)
527 par->vbe_modes_cnt--;
530 mib->depth = mib->red_len + mib->green_len + mib->blue_len;
533 * Handle 8bpp modes and modes with broken color component
536 if (mib->depth == 0 || (mib->depth == 24 &&
537 mib->bits_per_pixel == 32))
538 mib->depth = mib->bits_per_pixel;
541 if (par->vbe_modes_cnt > 0)
548 * The Protected Mode Interface is 32-bit x86 code, so we only run it on
549 * x86 and not x86_64.
552 static int uvesafb_vbe_getpmi(struct uvesafb_ktask *task,
553 struct uvesafb_par *par)
558 task->t.regs.eax = 0x4f0a;
559 task->t.regs.ebx = 0x0;
560 err = uvesafb_exec(task);
562 if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) {
563 par->pmi_setpal = par->ypan = 0;
565 par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4)
567 par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1];
568 par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2];
569 pr_info("protected mode interface info at %04x:%04x\n",
570 (u16)task->t.regs.es, (u16)task->t.regs.edi);
571 pr_info("pmi: set display start = %p, set palette = %p\n",
572 par->pmi_start, par->pmi_pal);
574 if (par->pmi_base[3]) {
575 pr_info("pmi: ports =");
576 for (i = par->pmi_base[3]/2;
577 par->pmi_base[i] != 0xffff; i++)
578 pr_cont(" %x", par->pmi_base[i]);
581 if (par->pmi_base[i] != 0xffff) {
582 pr_info("can't handle memory requests, pmi disabled\n");
583 par->ypan = par->pmi_setpal = 0;
589 #endif /* CONFIG_X86_32 */
592 * Check whether a video mode is supported by the Video BIOS and is
593 * compatible with the monitor limits.
595 static int uvesafb_is_valid_mode(struct fb_videomode *mode,
596 struct fb_info *info)
598 if (info->monspecs.gtf) {
599 fb_videomode_to_var(&info->var, mode);
600 if (fb_validate_mode(&info->var, info))
604 if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8,
605 UVESAFB_EXACT_RES) == -1)
611 static int uvesafb_vbe_getedid(struct uvesafb_ktask *task, struct fb_info *info)
613 struct uvesafb_par *par = info->par;
616 if (noedid || par->vbe_ib.vbe_version < 0x0300)
619 task->t.regs.eax = 0x4f15;
620 task->t.regs.ebx = 0;
621 task->t.regs.ecx = 0;
625 err = uvesafb_exec(task);
627 if ((task->t.regs.eax & 0xffff) != 0x004f || err)
630 if ((task->t.regs.ebx & 0x3) == 3) {
631 pr_info("VBIOS/hardware supports both DDC1 and DDC2 transfers\n");
632 } else if ((task->t.regs.ebx & 0x3) == 2) {
633 pr_info("VBIOS/hardware supports DDC2 transfers\n");
634 } else if ((task->t.regs.ebx & 0x3) == 1) {
635 pr_info("VBIOS/hardware supports DDC1 transfers\n");
637 pr_info("VBIOS/hardware doesn't support DDC transfers\n");
641 task->t.regs.eax = 0x4f15;
642 task->t.regs.ebx = 1;
643 task->t.regs.ecx = task->t.regs.edx = 0;
644 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
645 task->t.buf_len = EDID_LENGTH;
646 task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
650 err = uvesafb_exec(task);
652 if ((task->t.regs.eax & 0xffff) == 0x004f && !err) {
653 fb_edid_to_monspecs(task->buf, &info->monspecs);
655 if (info->monspecs.vfmax && info->monspecs.hfmax) {
657 * If the maximum pixel clock wasn't specified in
658 * the EDID block, set it to 300 MHz.
660 if (info->monspecs.dclkmax == 0)
661 info->monspecs.dclkmax = 300 * 1000000;
662 info->monspecs.gtf = 1;
672 static void uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task,
673 struct fb_info *info)
675 struct uvesafb_par *par = info->par;
678 memset(&info->monspecs, 0, sizeof(info->monspecs));
681 * If we don't get all necessary data from the EDID block,
682 * mark it as incompatible with the GTF and set nocrtc so
683 * that we always use the default BIOS refresh rate.
685 if (uvesafb_vbe_getedid(task, info)) {
686 info->monspecs.gtf = 0;
690 /* Kernel command line overrides. */
692 info->monspecs.dclkmax = maxclk * 1000000;
694 info->monspecs.vfmax = maxvf;
696 info->monspecs.hfmax = maxhf * 1000;
699 * In case DDC transfers are not supported, the user can provide
700 * monitor limits manually. Lower limits are set to "safe" values.
702 if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
703 info->monspecs.dclkmin = 0;
704 info->monspecs.vfmin = 60;
705 info->monspecs.hfmin = 29000;
706 info->monspecs.gtf = 1;
710 if (info->monspecs.gtf)
711 pr_info("monitor limits: vf = %d Hz, hf = %d kHz, clk = %d MHz\n",
712 info->monspecs.vfmax,
713 (int)(info->monspecs.hfmax / 1000),
714 (int)(info->monspecs.dclkmax / 1000000));
716 pr_info("no monitor limits have been set, default refresh rate will be used\n");
718 /* Add VBE modes to the modelist. */
719 for (i = 0; i < par->vbe_modes_cnt; i++) {
720 struct fb_var_screeninfo var;
721 struct vbe_mode_ib *mode;
722 struct fb_videomode vmode;
724 mode = &par->vbe_modes[i];
725 memset(&var, 0, sizeof(var));
727 var.xres = mode->x_res;
728 var.yres = mode->y_res;
730 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info);
731 fb_var_to_videomode(&vmode, &var);
732 fb_add_videomode(&vmode, &info->modelist);
735 /* Add valid VESA modes to our modelist. */
736 for (i = 0; i < VESA_MODEDB_SIZE; i++) {
737 if (uvesafb_is_valid_mode((struct fb_videomode *)
738 &vesa_modes[i], info))
739 fb_add_videomode(&vesa_modes[i], &info->modelist);
742 for (i = 0; i < info->monspecs.modedb_len; i++) {
743 if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info))
744 fb_add_videomode(&info->monspecs.modedb[i],
751 static void uvesafb_vbe_getstatesize(struct uvesafb_ktask *task,
752 struct uvesafb_par *par)
759 * Get the VBE state buffer size. We want all available
760 * hardware state data (CL = 0x0f).
762 task->t.regs.eax = 0x4f04;
763 task->t.regs.ecx = 0x000f;
764 task->t.regs.edx = 0x0000;
767 err = uvesafb_exec(task);
769 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
770 pr_warn("VBE state buffer size cannot be determined (eax=0x%x, err=%d)\n",
771 task->t.regs.eax, err);
772 par->vbe_state_size = 0;
776 par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff);
779 static int uvesafb_vbe_init(struct fb_info *info)
781 struct uvesafb_ktask *task = NULL;
782 struct uvesafb_par *par = info->par;
785 task = uvesafb_prep();
789 err = uvesafb_vbe_getinfo(task, par);
793 err = uvesafb_vbe_getmodes(task, par);
797 par->nocrtc = nocrtc;
799 par->pmi_setpal = pmi_setpal;
802 if (par->pmi_setpal || par->ypan) {
803 if (__supported_pte_mask & _PAGE_NX) {
804 par->pmi_setpal = par->ypan = 0;
805 pr_warn("NX protection is active, better not use the PMI\n");
807 uvesafb_vbe_getpmi(task, par);
811 /* The protected mode interface is not available on non-x86. */
812 par->pmi_setpal = par->ypan = 0;
815 INIT_LIST_HEAD(&info->modelist);
816 uvesafb_vbe_getmonspecs(task, info);
817 uvesafb_vbe_getstatesize(task, par);
819 out: uvesafb_free(task);
823 static int uvesafb_vbe_init_mode(struct fb_info *info)
825 struct list_head *pos;
826 struct fb_modelist *modelist;
827 struct fb_videomode *mode;
828 struct uvesafb_par *par = info->par;
831 /* Has the user requested a specific VESA mode? */
833 for (i = 0; i < par->vbe_modes_cnt; i++) {
834 if (par->vbe_modes[i].mode_id == vbemode) {
836 uvesafb_setup_var(&info->var, info,
837 &par->vbe_modes[modeid]);
838 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
841 * With pixclock set to 0, the default BIOS
842 * timings will be used in set_par().
844 info->var.pixclock = 0;
848 pr_info("requested VBE mode 0x%x is unavailable\n", vbemode);
852 /* Count the modes in the modelist */
854 list_for_each(pos, &info->modelist)
858 * Convert the modelist into a modedb so that we can use it with
861 mode = kzalloc(i * sizeof(*mode), GFP_KERNEL);
864 list_for_each(pos, &info->modelist) {
865 modelist = list_entry(pos, struct fb_modelist, list);
866 mode[i] = modelist->mode;
871 mode_option = UVESAFB_DEFAULT_MODE;
873 i = fb_find_mode(&info->var, info, mode_option, mode, i,
879 /* fb_find_mode() failed */
881 info->var.xres = 640;
882 info->var.yres = 480;
883 mode = (struct fb_videomode *)
884 fb_find_best_mode(&info->var, &info->modelist);
887 fb_videomode_to_var(&info->var, mode);
889 modeid = par->vbe_modes[0].mode_id;
890 uvesafb_setup_var(&info->var, info,
891 &par->vbe_modes[modeid]);
892 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
899 /* Look for a matching VBE mode. */
900 modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres,
901 info->var.bits_per_pixel, UVESAFB_EXACT_RES);
906 uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]);
910 * If we are not VBE3.0+ compliant, we're done -- the BIOS will
911 * ignore our timings anyway.
913 if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc)
914 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
920 static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count,
921 int start, struct fb_info *info)
923 struct uvesafb_ktask *task;
925 struct uvesafb_par *par = info->par;
926 int i = par->mode_idx;
931 * We support palette modifications for 8 bpp modes only, so
932 * there can never be more than 256 entries.
934 if (start + count > 256)
938 /* Use VGA registers if mode is VGA-compatible. */
939 if (i >= 0 && i < par->vbe_modes_cnt &&
940 par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
941 for (i = 0; i < count; i++) {
942 outb_p(start + i, dac_reg);
943 outb_p(entries[i].red, dac_val);
944 outb_p(entries[i].green, dac_val);
945 outb_p(entries[i].blue, dac_val);
949 else if (par->pmi_setpal) {
950 __asm__ __volatile__(
952 : /* no return value */
953 : "a" (0x4f09), /* EAX */
955 "c" (count), /* ECX */
956 "d" (start), /* EDX */
957 "D" (entries), /* EDI */
958 "S" (&par->pmi_pal)); /* ESI */
960 #endif /* CONFIG_X86_32 */
962 #endif /* CONFIG_X86 */
964 task = uvesafb_prep();
968 task->t.regs.eax = 0x4f09;
969 task->t.regs.ebx = 0x0;
970 task->t.regs.ecx = count;
971 task->t.regs.edx = start;
972 task->t.flags = TF_BUF_ESDI;
973 task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count;
976 err = uvesafb_exec(task);
977 if ((task->t.regs.eax & 0xffff) != 0x004f)
985 static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
986 unsigned blue, unsigned transp,
987 struct fb_info *info)
989 struct uvesafb_pal_entry entry;
990 int shift = 16 - dac_width;
993 if (regno >= info->cmap.len)
996 if (info->var.bits_per_pixel == 8) {
997 entry.red = red >> shift;
998 entry.green = green >> shift;
999 entry.blue = blue >> shift;
1002 err = uvesafb_setpalette(&entry, 1, regno, info);
1003 } else if (regno < 16) {
1004 switch (info->var.bits_per_pixel) {
1006 if (info->var.red.offset == 10) {
1008 ((u32 *) (info->pseudo_palette))[regno] =
1009 ((red & 0xf800) >> 1) |
1010 ((green & 0xf800) >> 6) |
1011 ((blue & 0xf800) >> 11);
1014 ((u32 *) (info->pseudo_palette))[regno] =
1016 ((green & 0xfc00) >> 5) |
1017 ((blue & 0xf800) >> 11);
1026 ((u32 *)(info->pseudo_palette))[regno] =
1027 (red << info->var.red.offset) |
1028 (green << info->var.green.offset) |
1029 (blue << info->var.blue.offset);
1036 static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1038 struct uvesafb_pal_entry *entries;
1039 int shift = 16 - dac_width;
1042 if (info->var.bits_per_pixel == 8) {
1043 if (cmap->start + cmap->len > info->cmap.start +
1044 info->cmap.len || cmap->start < info->cmap.start)
1047 entries = kmalloc_array(cmap->len, sizeof(*entries),
1052 for (i = 0; i < cmap->len; i++) {
1053 entries[i].red = cmap->red[i] >> shift;
1054 entries[i].green = cmap->green[i] >> shift;
1055 entries[i].blue = cmap->blue[i] >> shift;
1058 err = uvesafb_setpalette(entries, cmap->len, cmap->start, info);
1062 * For modes with bpp > 8, we only set the pseudo palette in
1063 * the fb_info struct. We rely on uvesafb_setcolreg to do all
1066 for (i = 0; i < cmap->len; i++) {
1067 err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i],
1068 cmap->green[i], cmap->blue[i],
1075 static int uvesafb_pan_display(struct fb_var_screeninfo *var,
1076 struct fb_info *info)
1078 #ifdef CONFIG_X86_32
1080 struct uvesafb_par *par = info->par;
1082 offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
1085 * It turns out it's not the best idea to do panning via vm86,
1086 * so we only allow it if we have a PMI.
1088 if (par->pmi_start) {
1089 __asm__ __volatile__(
1091 : /* no return value */
1092 : "a" (0x4f07), /* EAX */
1094 "c" (offset), /* ECX */
1095 "d" (offset >> 16), /* EDX */
1096 "D" (&par->pmi_start)); /* EDI */
1102 static int uvesafb_blank(int blank, struct fb_info *info)
1104 struct uvesafb_ktask *task;
1107 struct uvesafb_par *par = info->par;
1109 if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
1111 u8 seq = 0, crtc17 = 0;
1113 if (blank == FB_BLANK_POWERDOWN) {
1120 err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
1123 vga_wseq(NULL, 0x00, 0x01);
1124 seq |= vga_rseq(NULL, 0x01) & ~0x20;
1125 vga_wseq(NULL, 0x00, seq);
1127 crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
1129 vga_wcrt(NULL, 0x17, crtc17);
1130 vga_wseq(NULL, 0x00, 0x03);
1132 #endif /* CONFIG_X86 */
1134 task = uvesafb_prep();
1138 task->t.regs.eax = 0x4f10;
1140 case FB_BLANK_UNBLANK:
1141 task->t.regs.ebx = 0x0001;
1143 case FB_BLANK_NORMAL:
1144 task->t.regs.ebx = 0x0101; /* standby */
1146 case FB_BLANK_POWERDOWN:
1147 task->t.regs.ebx = 0x0401; /* powerdown */
1153 err = uvesafb_exec(task);
1154 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
1156 out: uvesafb_free(task);
1161 static int uvesafb_open(struct fb_info *info, int user)
1163 struct uvesafb_par *par = info->par;
1164 int cnt = atomic_read(&par->ref_count);
1167 if (!cnt && par->vbe_state_size) {
1168 buf = uvesafb_vbe_state_save(par);
1170 pr_warn("save hardware state failed, error code is %ld!\n",
1173 par->vbe_state_orig = buf;
1177 atomic_inc(&par->ref_count);
1181 static int uvesafb_release(struct fb_info *info, int user)
1183 struct uvesafb_ktask *task = NULL;
1184 struct uvesafb_par *par = info->par;
1185 int cnt = atomic_read(&par->ref_count);
1193 task = uvesafb_prep();
1197 /* First, try to set the standard 80x25 text mode. */
1198 task->t.regs.eax = 0x0003;
1202 * Now try to restore whatever hardware state we might have
1203 * saved when the fb device was first opened.
1205 uvesafb_vbe_state_restore(par, par->vbe_state_orig);
1207 atomic_dec(&par->ref_count);
1212 static int uvesafb_set_par(struct fb_info *info)
1214 struct uvesafb_par *par = info->par;
1215 struct uvesafb_ktask *task = NULL;
1216 struct vbe_crtc_ib *crtc = NULL;
1217 struct vbe_mode_ib *mode = NULL;
1218 int i, err = 0, depth = info->var.bits_per_pixel;
1220 if (depth > 8 && depth != 32)
1221 depth = info->var.red.length + info->var.green.length +
1222 info->var.blue.length;
1224 i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
1225 UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
1227 mode = &par->vbe_modes[i];
1231 task = uvesafb_prep();
1235 task->t.regs.eax = 0x4f02;
1236 task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */
1238 if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
1239 info->var.pixclock != 0) {
1240 task->t.regs.ebx |= 0x0800; /* use CRTC data */
1241 task->t.flags = TF_BUF_ESDI;
1242 crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
1247 crtc->horiz_start = info->var.xres + info->var.right_margin;
1248 crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
1249 crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
1251 crtc->vert_start = info->var.yres + info->var.lower_margin;
1252 crtc->vert_end = crtc->vert_start + info->var.vsync_len;
1253 crtc->vert_total = crtc->vert_end + info->var.upper_margin;
1255 crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
1256 crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
1257 (crtc->vert_total * crtc->horiz_total)));
1259 if (info->var.vmode & FB_VMODE_DOUBLE)
1261 if (info->var.vmode & FB_VMODE_INTERLACED)
1263 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
1265 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
1267 memcpy(&par->crtc, crtc, sizeof(*crtc));
1269 memset(&par->crtc, 0, sizeof(*crtc));
1272 task->t.buf_len = sizeof(struct vbe_crtc_ib);
1273 task->buf = &par->crtc;
1275 err = uvesafb_exec(task);
1276 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
1278 * The mode switch might have failed because we tried to
1279 * use our own timings. Try again with the default timings.
1282 pr_warn("mode switch failed (eax=0x%x, err=%d) - trying again with default timings\n",
1283 task->t.regs.eax, err);
1284 uvesafb_reset(task);
1287 info->var.pixclock = 0;
1290 pr_err("mode switch failed (eax=0x%x, err=%d)\n",
1291 task->t.regs.eax, err);
1298 /* For 8bpp modes, always try to set the DAC to 8 bits. */
1299 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
1300 mode->bits_per_pixel <= 8) {
1301 uvesafb_reset(task);
1302 task->t.regs.eax = 0x4f08;
1303 task->t.regs.ebx = 0x0800;
1305 err = uvesafb_exec(task);
1306 if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
1307 ((task->t.regs.ebx & 0xff00) >> 8) != 8) {
1314 info->fix.visual = (info->var.bits_per_pixel == 8) ?
1315 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1316 info->fix.line_length = mode->bytes_per_scan_line;
1325 static void uvesafb_check_limits(struct fb_var_screeninfo *var,
1326 struct fb_info *info)
1328 const struct fb_videomode *mode;
1329 struct uvesafb_par *par = info->par;
1332 * If pixclock is set to 0, then we're using default BIOS timings
1333 * and thus don't have to perform any checks here.
1338 if (par->vbe_ib.vbe_version < 0x0300) {
1339 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
1343 if (!fb_validate_mode(var, info))
1346 mode = fb_find_best_mode(var, &info->modelist);
1348 if (mode->xres == var->xres && mode->yres == var->yres &&
1349 !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
1350 fb_videomode_to_var(var, mode);
1355 if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
1357 /* Use default refresh rate */
1361 static int uvesafb_check_var(struct fb_var_screeninfo *var,
1362 struct fb_info *info)
1364 struct uvesafb_par *par = info->par;
1365 struct vbe_mode_ib *mode = NULL;
1367 int depth = var->red.length + var->green.length + var->blue.length;
1370 * Various apps will use bits_per_pixel to set the color depth,
1371 * which is theoretically incorrect, but which we'll try to handle
1374 if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
1375 depth = var->bits_per_pixel;
1377 match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth,
1382 mode = &par->vbe_modes[match];
1383 uvesafb_setup_var(var, info, mode);
1386 * Check whether we have remapped enough memory for this mode.
1387 * We might be called at an early stage, when we haven't remapped
1388 * any memory yet, in which case we simply skip the check.
1390 if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len
1391 && info->fix.smem_len)
1394 if ((var->vmode & FB_VMODE_DOUBLE) &&
1395 !(par->vbe_modes[match].mode_attr & 0x100))
1396 var->vmode &= ~FB_VMODE_DOUBLE;
1398 if ((var->vmode & FB_VMODE_INTERLACED) &&
1399 !(par->vbe_modes[match].mode_attr & 0x200))
1400 var->vmode &= ~FB_VMODE_INTERLACED;
1402 uvesafb_check_limits(var, info);
1404 var->xres_virtual = var->xres;
1405 var->yres_virtual = (par->ypan) ?
1406 info->fix.smem_len / mode->bytes_per_scan_line :
1411 static struct fb_ops uvesafb_ops = {
1412 .owner = THIS_MODULE,
1413 .fb_open = uvesafb_open,
1414 .fb_release = uvesafb_release,
1415 .fb_setcolreg = uvesafb_setcolreg,
1416 .fb_setcmap = uvesafb_setcmap,
1417 .fb_pan_display = uvesafb_pan_display,
1418 .fb_blank = uvesafb_blank,
1419 .fb_fillrect = cfb_fillrect,
1420 .fb_copyarea = cfb_copyarea,
1421 .fb_imageblit = cfb_imageblit,
1422 .fb_check_var = uvesafb_check_var,
1423 .fb_set_par = uvesafb_set_par,
1426 static void uvesafb_init_info(struct fb_info *info, struct vbe_mode_ib *mode)
1428 unsigned int size_vmode;
1429 unsigned int size_remap;
1430 unsigned int size_total;
1431 struct uvesafb_par *par = info->par;
1434 info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
1435 info->fix = uvesafb_fix;
1436 info->fix.ypanstep = par->ypan ? 1 : 0;
1437 info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
1439 /* Disable blanking if the user requested so. */
1441 info->fbops->fb_blank = NULL;
1444 * Find out how much IO memory is required for the mode with
1445 * the highest resolution.
1448 for (i = 0; i < par->vbe_modes_cnt; i++) {
1449 h = par->vbe_modes[i].bytes_per_scan_line *
1450 par->vbe_modes[i].y_res;
1457 * size_vmode -- that is the amount of memory needed for the
1458 * used video mode, i.e. the minimum amount of
1461 size_vmode = info->var.yres * mode->bytes_per_scan_line;
1464 * size_total -- all video memory we have. Used for mtrr
1465 * entries, resource allocation and bounds
1468 size_total = par->vbe_ib.total_memory * 65536;
1470 size_total = vram_total * 1024 * 1024;
1471 if (size_total < size_vmode)
1472 size_total = size_vmode;
1475 * size_remap -- the amount of video memory we are going to
1476 * use for vesafb. With modern cards it is no
1477 * option to simply use size_total as th
1478 * wastes plenty of kernel address space.
1481 size_remap = vram_remap * 1024 * 1024;
1482 if (size_remap < size_vmode)
1483 size_remap = size_vmode;
1484 if (size_remap > size_total)
1485 size_remap = size_total;
1487 info->fix.smem_len = size_remap;
1488 info->fix.smem_start = mode->phys_base_ptr;
1491 * We have to set yres_virtual here because when setup_var() was
1492 * called, smem_len wasn't defined yet.
1494 info->var.yres_virtual = info->fix.smem_len /
1495 mode->bytes_per_scan_line;
1497 if (par->ypan && info->var.yres_virtual > info->var.yres) {
1498 pr_info("scrolling: %s using protected mode interface, yres_virtual=%d\n",
1499 (par->ypan > 1) ? "ywrap" : "ypan",
1500 info->var.yres_virtual);
1502 pr_info("scrolling: redraw\n");
1503 info->var.yres_virtual = info->var.yres;
1507 info->flags = FBINFO_FLAG_DEFAULT |
1508 (par->ypan ? FBINFO_HWACCEL_YPAN : 0);
1511 info->fbops->fb_pan_display = NULL;
1514 static void uvesafb_init_mtrr(struct fb_info *info)
1516 struct uvesafb_par *par = info->par;
1518 if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
1519 int temp_size = info->fix.smem_len;
1523 /* Find the largest power-of-two */
1524 temp_size = roundup_pow_of_two(temp_size);
1526 /* Try and find a power of two to add */
1528 rc = arch_phys_wc_add(info->fix.smem_start, temp_size);
1530 } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
1533 par->mtrr_handle = rc;
1537 static void uvesafb_ioremap(struct fb_info *info)
1539 info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len);
1542 static ssize_t uvesafb_show_vbe_ver(struct device *dev,
1543 struct device_attribute *attr, char *buf)
1545 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1546 struct uvesafb_par *par = info->par;
1548 return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
1551 static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
1553 static ssize_t uvesafb_show_vbe_modes(struct device *dev,
1554 struct device_attribute *attr, char *buf)
1556 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1557 struct uvesafb_par *par = info->par;
1560 for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
1561 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1562 "%dx%d-%d, 0x%.4x\n",
1563 par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
1564 par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
1570 static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
1572 static ssize_t uvesafb_show_vendor(struct device *dev,
1573 struct device_attribute *attr, char *buf)
1575 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1576 struct uvesafb_par *par = info->par;
1578 if (par->vbe_ib.oem_vendor_name_ptr)
1579 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1580 (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
1585 static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
1587 static ssize_t uvesafb_show_product_name(struct device *dev,
1588 struct device_attribute *attr, char *buf)
1590 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1591 struct uvesafb_par *par = info->par;
1593 if (par->vbe_ib.oem_product_name_ptr)
1594 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1595 (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
1600 static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
1602 static ssize_t uvesafb_show_product_rev(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;
1608 if (par->vbe_ib.oem_product_rev_ptr)
1609 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1610 (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
1615 static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
1617 static ssize_t uvesafb_show_oem_string(struct device *dev,
1618 struct device_attribute *attr, char *buf)
1620 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1621 struct uvesafb_par *par = info->par;
1623 if (par->vbe_ib.oem_string_ptr)
1624 return snprintf(buf, PAGE_SIZE, "%s\n",
1625 (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
1630 static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
1632 static ssize_t uvesafb_show_nocrtc(struct device *dev,
1633 struct device_attribute *attr, char *buf)
1635 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1636 struct uvesafb_par *par = info->par;
1638 return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
1641 static ssize_t uvesafb_store_nocrtc(struct device *dev,
1642 struct device_attribute *attr, const char *buf, size_t count)
1644 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1645 struct uvesafb_par *par = info->par;
1656 static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
1657 uvesafb_store_nocrtc);
1659 static struct attribute *uvesafb_dev_attrs[] = {
1660 &dev_attr_vbe_version.attr,
1661 &dev_attr_vbe_modes.attr,
1662 &dev_attr_oem_vendor.attr,
1663 &dev_attr_oem_product_name.attr,
1664 &dev_attr_oem_product_rev.attr,
1665 &dev_attr_oem_string.attr,
1666 &dev_attr_nocrtc.attr,
1670 static const struct attribute_group uvesafb_dev_attgrp = {
1672 .attrs = uvesafb_dev_attrs,
1675 static int uvesafb_probe(struct platform_device *dev)
1677 struct fb_info *info;
1678 struct vbe_mode_ib *mode = NULL;
1679 struct uvesafb_par *par;
1682 info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev);
1688 err = uvesafb_vbe_init(info);
1690 pr_err("vbe_init() failed with %d\n", err);
1694 info->fbops = &uvesafb_ops;
1696 i = uvesafb_vbe_init_mode(info);
1701 mode = &par->vbe_modes[i];
1704 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
1709 uvesafb_init_info(info, mode);
1711 if (!request_region(0x3c0, 32, "uvesafb")) {
1712 pr_err("request region 0x3c0-0x3e0 failed\n");
1717 if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
1719 pr_err("cannot reserve video memory at 0x%lx\n",
1720 info->fix.smem_start);
1725 uvesafb_init_mtrr(info);
1726 uvesafb_ioremap(info);
1728 if (!info->screen_base) {
1729 pr_err("abort, cannot ioremap 0x%x bytes of video memory at 0x%lx\n",
1730 info->fix.smem_len, info->fix.smem_start);
1735 platform_set_drvdata(dev, info);
1737 if (register_framebuffer(info) < 0) {
1738 pr_err("failed to register framebuffer device\n");
1743 pr_info("framebuffer at 0x%lx, mapped to 0x%p, using %dk, total %dk\n",
1744 info->fix.smem_start, info->screen_base,
1745 info->fix.smem_len / 1024, par->vbe_ib.total_memory * 64);
1746 fb_info(info, "%s frame buffer device\n", info->fix.id);
1748 err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1750 fb_warn(info, "failed to register attributes\n");
1755 iounmap(info->screen_base);
1757 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1759 release_region(0x3c0, 32);
1761 if (!list_empty(&info->modelist))
1762 fb_destroy_modelist(&info->modelist);
1763 fb_destroy_modedb(info->monspecs.modedb);
1764 fb_dealloc_cmap(&info->cmap);
1766 kfree(par->vbe_modes);
1768 framebuffer_release(info);
1772 static int uvesafb_remove(struct platform_device *dev)
1774 struct fb_info *info = platform_get_drvdata(dev);
1777 struct uvesafb_par *par = info->par;
1779 sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1780 unregister_framebuffer(info);
1781 release_region(0x3c0, 32);
1782 iounmap(info->screen_base);
1783 arch_phys_wc_del(par->mtrr_handle);
1784 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1785 fb_destroy_modedb(info->monspecs.modedb);
1786 fb_dealloc_cmap(&info->cmap);
1788 kfree(par->vbe_modes);
1789 kfree(par->vbe_state_orig);
1790 kfree(par->vbe_state_saved);
1792 framebuffer_release(info);
1797 static struct platform_driver uvesafb_driver = {
1798 .probe = uvesafb_probe,
1799 .remove = uvesafb_remove,
1805 static struct platform_device *uvesafb_device;
1808 static int uvesafb_setup(char *options)
1812 if (!options || !*options)
1815 while ((this_opt = strsep(&options, ",")) != NULL) {
1816 if (!*this_opt) continue;
1818 if (!strcmp(this_opt, "redraw"))
1820 else if (!strcmp(this_opt, "ypan"))
1822 else if (!strcmp(this_opt, "ywrap"))
1824 else if (!strcmp(this_opt, "vgapal"))
1826 else if (!strcmp(this_opt, "pmipal"))
1828 else if (!strncmp(this_opt, "mtrr:", 5))
1829 mtrr = simple_strtoul(this_opt+5, NULL, 0);
1830 else if (!strcmp(this_opt, "nomtrr"))
1832 else if (!strcmp(this_opt, "nocrtc"))
1834 else if (!strcmp(this_opt, "noedid"))
1836 else if (!strcmp(this_opt, "noblank"))
1838 else if (!strncmp(this_opt, "vtotal:", 7))
1839 vram_total = simple_strtoul(this_opt + 7, NULL, 0);
1840 else if (!strncmp(this_opt, "vremap:", 7))
1841 vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
1842 else if (!strncmp(this_opt, "maxhf:", 6))
1843 maxhf = simple_strtoul(this_opt + 6, NULL, 0);
1844 else if (!strncmp(this_opt, "maxvf:", 6))
1845 maxvf = simple_strtoul(this_opt + 6, NULL, 0);
1846 else if (!strncmp(this_opt, "maxclk:", 7))
1847 maxclk = simple_strtoul(this_opt + 7, NULL, 0);
1848 else if (!strncmp(this_opt, "vbemode:", 8))
1849 vbemode = simple_strtoul(this_opt + 8, NULL, 0);
1850 else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
1851 mode_option = this_opt;
1853 pr_warn("unrecognized option %s\n", this_opt);
1857 if (mtrr != 3 && mtrr != 0)
1858 pr_warn("uvesafb: mtrr should be set to 0 or 3; %d is unsupported", mtrr);
1862 #endif /* !MODULE */
1864 static ssize_t v86d_show(struct device_driver *dev, char *buf)
1866 return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
1869 static ssize_t v86d_store(struct device_driver *dev, const char *buf,
1872 strncpy(v86d_path, buf, PATH_MAX);
1875 static DRIVER_ATTR_RW(v86d);
1877 static int uvesafb_init(void)
1882 char *option = NULL;
1884 if (fb_get_options("uvesafb", &option))
1886 uvesafb_setup(option);
1888 err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
1892 err = platform_driver_register(&uvesafb_driver);
1895 uvesafb_device = platform_device_alloc("uvesafb", 0);
1897 err = platform_device_add(uvesafb_device);
1902 platform_device_put(uvesafb_device);
1903 platform_driver_unregister(&uvesafb_driver);
1904 cn_del_callback(&uvesafb_cn_id);
1908 err = driver_create_file(&uvesafb_driver.driver,
1911 pr_warn("failed to register attributes\n");
1918 module_init(uvesafb_init);
1920 static void uvesafb_exit(void)
1922 struct uvesafb_ktask *task;
1925 task = uvesafb_prep();
1927 task->t.flags = TF_EXIT;
1933 cn_del_callback(&uvesafb_cn_id);
1934 driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
1935 platform_device_unregister(uvesafb_device);
1936 platform_driver_unregister(&uvesafb_driver);
1939 module_exit(uvesafb_exit);
1941 static int param_set_scroll(const char *val, const struct kernel_param *kp)
1945 if (!strcmp(val, "redraw"))
1947 else if (!strcmp(val, "ypan"))
1949 else if (!strcmp(val, "ywrap"))
1956 static const struct kernel_param_ops param_ops_scroll = {
1957 .set = param_set_scroll,
1959 #define param_check_scroll(name, p) __param_check(name, p, void)
1961 module_param_named(scroll, ypan, scroll, 0);
1962 MODULE_PARM_DESC(scroll,
1963 "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'");
1964 module_param_named(vgapal, pmi_setpal, invbool, 0);
1965 MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
1966 module_param_named(pmipal, pmi_setpal, bool, 0);
1967 MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
1968 module_param(mtrr, uint, 0);
1969 MODULE_PARM_DESC(mtrr,
1970 "Memory Type Range Registers setting. Use 0 to disable.");
1971 module_param(blank, bool, 0);
1972 MODULE_PARM_DESC(blank, "Enable hardware blanking");
1973 module_param(nocrtc, bool, 0);
1974 MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
1975 module_param(noedid, bool, 0);
1976 MODULE_PARM_DESC(noedid,
1977 "Ignore EDID-provided monitor limits when setting modes");
1978 module_param(vram_remap, uint, 0);
1979 MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
1980 module_param(vram_total, uint, 0);
1981 MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
1982 module_param(maxclk, ushort, 0);
1983 MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
1984 module_param(maxhf, ushort, 0);
1985 MODULE_PARM_DESC(maxhf,
1986 "Maximum horizontal frequency [kHz], overrides EDID data");
1987 module_param(maxvf, ushort, 0);
1988 MODULE_PARM_DESC(maxvf,
1989 "Maximum vertical frequency [Hz], overrides EDID data");
1990 module_param(mode_option, charp, 0);
1991 MODULE_PARM_DESC(mode_option,
1992 "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
1993 module_param(vbemode, ushort, 0);
1994 MODULE_PARM_DESC(vbemode,
1995 "VBE mode number to set, overrides the 'mode' option");
1996 module_param_string(v86d, v86d_path, PATH_MAX, 0660);
1997 MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
1999 MODULE_LICENSE("GPL");
2000 MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>");
2001 MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");