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-rw-r--r--drivers/video/Kconfig18
-rw-r--r--drivers/video/Makefile1
-rw-r--r--drivers/video/uvesafb.c2066
-rw-r--r--include/video/Kbuild2
-rw-r--r--include/video/uvesafb.h193
5 files changed, 2279 insertions, 1 deletions
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 5216c11d4de..f1cc8996456 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -592,6 +592,24 @@ config FB_TGA
Say Y if you have one of those.
+config FB_UVESA
+ tristate "Userspace VESA VGA graphics support"
+ depends on FB && CONNECTOR
+ select FB_CFB_FILLRECT
+ select FB_CFB_COPYAREA
+ select FB_CFB_IMAGEBLIT
+ select FB_MODE_HELPERS
+ help
+ This is the frame buffer driver for generic VBE 2.0 compliant
+ graphic cards. It can also take advantage of VBE 3.0 features,
+ such as refresh rate adjustment.
+
+ This driver generally provides more features than vesafb but
+ requires a userspace helper application called 'v86d'. See
+ <file:Documentation/fb/uvesafb.txt> for more information.
+
+ If unsure, say N.
+
config FB_VESA
bool "VESA VGA graphics support"
depends on (FB = y) && X86
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 06eec7b182b..67dc278e557 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -115,6 +115,7 @@ obj-$(CONFIG_FB_XILINX) += xilinxfb.o
obj-$(CONFIG_FB_OMAP) += omap/
# Platform or fallback drivers go here
+obj-$(CONFIG_FB_UVESA) += uvesafb.o
obj-$(CONFIG_FB_VESA) += vesafb.o
obj-$(CONFIG_FB_IMAC) += imacfb.o
obj-$(CONFIG_FB_VGA16) += vga16fb.o
diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c
new file mode 100644
index 00000000000..b983d262ab7
--- /dev/null
+++ b/drivers/video/uvesafb.c
@@ -0,0 +1,2066 @@
+/*
+ * A framebuffer driver for VBE 2.0+ compliant video cards
+ *
+ * (c) 2007 Michal Januszewski <spock@gentoo.org>
+ * Loosely based upon the vesafb driver.
+ *
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/skbuff.h>
+#include <linux/timer.h>
+#include <linux/completion.h>
+#include <linux/connector.h>
+#include <linux/random.h>
+#include <linux/platform_device.h>
+#include <linux/limits.h>
+#include <linux/fb.h>
+#include <linux/io.h>
+#include <linux/mutex.h>
+#include <video/edid.h>
+#include <video/uvesafb.h>
+#ifdef CONFIG_X86
+#include <video/vga.h>
+#endif
+#ifdef CONFIG_MTRR
+#include <asm/mtrr.h>
+#endif
+#include "edid.h"
+
+static struct cb_id uvesafb_cn_id = {
+ .idx = CN_IDX_V86D,
+ .val = CN_VAL_V86D_UVESAFB
+};
+static char v86d_path[PATH_MAX] = "/sbin/v86d";
+static char v86d_started; /* has v86d been started by uvesafb? */
+
+static struct fb_fix_screeninfo uvesafb_fix __devinitdata = {
+ .id = "VESA VGA",
+ .type = FB_TYPE_PACKED_PIXELS,
+ .accel = FB_ACCEL_NONE,
+ .visual = FB_VISUAL_TRUECOLOR,
+};
+
+static int mtrr __devinitdata = 3; /* enable mtrr by default */
+static int blank __devinitdata = 1; /* enable blanking by default */
+static int ypan __devinitdata = 1; /* 0: scroll, 1: ypan, 2: ywrap */
+static int pmi_setpal __devinitdata = 1; /* use PMI for palette changes */
+static int nocrtc __devinitdata; /* ignore CRTC settings */
+static int noedid __devinitdata; /* don't try DDC transfers */
+static int vram_remap __devinitdata; /* set amt. of memory to be used */
+static int vram_total __devinitdata; /* set total amount of memory */
+static u16 maxclk __devinitdata; /* maximum pixel clock */
+static u16 maxvf __devinitdata; /* maximum vertical frequency */
+static u16 maxhf __devinitdata; /* maximum horizontal frequency */
+static u16 vbemode __devinitdata; /* force use of a specific VBE mode */
+static char *mode_option __devinitdata;
+
+static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX];
+static DEFINE_MUTEX(uvfb_lock);
+
+/*
+ * A handler for replies from userspace.
+ *
+ * Make sure each message passes consistency checks and if it does,
+ * find the kernel part of the task struct, copy the registers and
+ * the buffer contents and then complete the task.
+ */
+static void uvesafb_cn_callback(void *data)
+{
+ struct cn_msg *msg = data;
+ struct uvesafb_task *utask;
+ struct uvesafb_ktask *task;
+
+ if (msg->seq >= UVESAFB_TASKS_MAX)
+ return;
+
+ mutex_lock(&uvfb_lock);
+ task = uvfb_tasks[msg->seq];
+
+ if (!task || msg->ack != task->ack) {
+ mutex_unlock(&uvfb_lock);
+ return;
+ }
+
+ utask = (struct uvesafb_task *)msg->data;
+
+ /* Sanity checks for the buffer length. */
+ if (task->t.buf_len < utask->buf_len ||
+ utask->buf_len > msg->len - sizeof(*utask)) {
+ mutex_unlock(&uvfb_lock);
+ return;
+ }
+
+ uvfb_tasks[msg->seq] = NULL;
+ mutex_unlock(&uvfb_lock);
+
+ memcpy(&task->t, utask, sizeof(*utask));
+
+ if (task->t.buf_len && task->buf)
+ memcpy(task->buf, utask + 1, task->t.buf_len);
+
+ complete(task->done);
+ return;
+}
+
+static int uvesafb_helper_start(void)
+{
+ char *envp[] = {
+ "HOME=/",
+ "PATH=/sbin:/bin",
+ NULL,
+ };
+
+ char *argv[] = {
+ v86d_path,
+ NULL,
+ };
+
+ return call_usermodehelper(v86d_path, argv, envp, 1);
+}
+
+/*
+ * Execute a uvesafb task.
+ *
+ * Returns 0 if the task is executed successfully.
+ *
+ * A message sent to the userspace consists of the uvesafb_task
+ * struct and (optionally) a buffer. The uvesafb_task struct is
+ * a simplified version of uvesafb_ktask (its kernel counterpart)
+ * containing only the register values, flags and the length of
+ * the buffer.
+ *
+ * Each message is assigned a sequence number (increased linearly)
+ * and a random ack number. The sequence number is used as a key
+ * for the uvfb_tasks array which holds pointers to uvesafb_ktask
+ * structs for all requests.
+ */
+static int uvesafb_exec(struct uvesafb_ktask *task)
+{
+ static int seq;
+ struct cn_msg *m;
+ int err;
+ int len = sizeof(task->t) + task->t.buf_len;
+
+ /*
+ * Check whether the message isn't longer than the maximum
+ * allowed by connector.
+ */
+ if (sizeof(*m) + len > CONNECTOR_MAX_MSG_SIZE) {
+ printk(KERN_WARNING "uvesafb: message too long (%d), "
+ "can't execute task\n", (int)(sizeof(*m) + len));
+ return -E2BIG;
+ }
+
+ m = kzalloc(sizeof(*m) + len, GFP_KERNEL);
+ if (!m)
+ return -ENOMEM;
+
+ init_completion(task->done);
+
+ memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id));
+ m->seq = seq;
+ m->len = len;
+ m->ack = random32();
+
+ /* uvesafb_task structure */
+ memcpy(m + 1, &task->t, sizeof(task->t));
+
+ /* Buffer */
+ memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len);
+
+ /*
+ * Save the message ack number so that we can find the kernel
+ * part of this task when a reply is received from userspace.
+ */
+ task->ack = m->ack;
+
+ mutex_lock(&uvfb_lock);
+
+ /* If all slots are taken -- bail out. */
+ if (uvfb_tasks[seq]) {
+ mutex_unlock(&uvfb_lock);
+ return -EBUSY;
+ }
+
+ /* Save a pointer to the kernel part of the task struct. */
+ uvfb_tasks[seq] = task;
+ mutex_unlock(&uvfb_lock);
+
+ err = cn_netlink_send(m, 0, gfp_any());
+ if (err == -ESRCH) {
+ /*
+ * Try to start the userspace helper if sending
+ * the request failed the first time.
+ */
+ err = uvesafb_helper_start();
+ if (err) {
+ printk(KERN_ERR "uvesafb: failed to execute %s\n",
+ v86d_path);
+ printk(KERN_ERR "uvesafb: make sure that the v86d "
+ "helper is installed and executable\n");
+ } else {
+ v86d_started = 1;
+ err = cn_netlink_send(m, 0, gfp_any());
+ }
+ }
+ kfree(m);
+
+ if (!err && !(task->t.flags & TF_EXIT))
+ err = !wait_for_completion_timeout(task->done,
+ msecs_to_jiffies(UVESAFB_TIMEOUT));
+
+ mutex_lock(&uvfb_lock);
+ uvfb_tasks[seq] = NULL;
+ mutex_unlock(&uvfb_lock);
+
+ seq++;
+ if (seq >= UVESAFB_TASKS_MAX)
+ seq = 0;
+
+ return err;
+}
+
+/*
+ * Free a uvesafb_ktask struct.
+ */
+static void uvesafb_free(struct uvesafb_ktask *task)
+{
+ if (task) {
+ if (task->done)
+ kfree(task->done);
+ kfree(task);
+ }
+}
+
+/*
+ * Prepare a uvesafb_ktask struct to be used again.
+ */
+static void uvesafb_reset(struct uvesafb_ktask *task)
+{
+ struct completion *cpl = task->done;
+
+ memset(task, 0, sizeof(*task));
+ task->done = cpl;
+}
+
+/*
+ * Allocate and prepare a uvesafb_ktask struct.
+ */
+static struct uvesafb_ktask *uvesafb_prep(void)
+{
+ struct uvesafb_ktask *task;
+
+ task = kzalloc(sizeof(*task), GFP_KERNEL);
+ if (task) {
+ task->done = kzalloc(sizeof(*task->done), GFP_KERNEL);
+ if (!task->done) {
+ kfree(task);
+ task = NULL;
+ }
+ }
+ return task;
+}
+
+static void uvesafb_setup_var(struct fb_var_screeninfo *var,
+ struct fb_info *info, struct vbe_mode_ib *mode)
+{
+ struct uvesafb_par *par = info->par;
+
+ var->vmode = FB_VMODE_NONINTERLACED;
+ var->sync = FB_SYNC_VERT_HIGH_ACT;
+
+ var->xres = mode->x_res;
+ var->yres = mode->y_res;
+ var->xres_virtual = mode->x_res;
+ var->yres_virtual = (par->ypan) ?
+ info->fix.smem_len / mode->bytes_per_scan_line :
+ mode->y_res;
+ var->xoffset = 0;
+ var->yoffset = 0;
+ var->bits_per_pixel = mode->bits_per_pixel;
+
+ if (var->bits_per_pixel == 15)
+ var->bits_per_pixel = 16;
+
+ if (var->bits_per_pixel > 8) {
+ var->red.offset = mode->red_off;
+ var->red.length = mode->red_len;
+ var->green.offset = mode->green_off;
+ var->green.length = mode->green_len;
+ var->blue.offset = mode->blue_off;
+ var->blue.length = mode->blue_len;
+ var->transp.offset = mode->rsvd_off;
+ var->transp.length = mode->rsvd_len;
+ } else {
+ var->red.offset = 0;
+ var->green.offset = 0;
+ var->blue.offset = 0;
+ var->transp.offset = 0;
+
+ /*
+ * We're assuming that we can switch the DAC to 8 bits. If
+ * this proves to be incorrect, we'll update the fields
+ * later in set_par().
+ */
+ if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC) {
+ var->red.length = 8;
+ var->green.length = 8;
+ var->blue.length = 8;
+ var->transp.length = 0;
+ } else {
+ var->red.length = 6;
+ var->green.length = 6;
+ var->blue.length = 6;
+ var->transp.length = 0;
+ }
+ }
+}
+
+static int uvesafb_vbe_find_mode(struct uvesafb_par *par,
+ int xres, int yres, int depth, unsigned char flags)
+{
+ int i, match = -1, h = 0, d = 0x7fffffff;
+
+ for (i = 0; i < par->vbe_modes_cnt; i++) {
+ h = abs(par->vbe_modes[i].x_res - xres) +
+ abs(par->vbe_modes[i].y_res - yres) +
+ abs(depth - par->vbe_modes[i].depth);
+
+ /*
+ * We have an exact match in terms of resolution
+ * and depth.
+ */
+ if (h == 0)
+ return i;
+
+ if (h < d || (h == d && par->vbe_modes[i].depth > depth)) {
+ d = h;
+ match = i;
+ }
+ }
+ i = 1;
+
+ if (flags & UVESAFB_EXACT_DEPTH &&
+ par->vbe_modes[match].depth != depth)
+ i = 0;
+
+ if (flags & UVESAFB_EXACT_RES && d > 24)
+ i = 0;
+
+ if (i != 0)
+ return match;
+ else
+ return -1;
+}
+
+static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par)
+{
+ struct uvesafb_ktask *task;
+ u8 *state;
+ int err;
+
+ if (!par->vbe_state_size)
+ return NULL;
+
+ state = kmalloc(par->vbe_state_size, GFP_KERNEL);
+ if (!state)
+ return NULL;
+
+ task = uvesafb_prep();
+ if (!task) {
+ kfree(state);
+ return NULL;
+ }
+
+ task->t.regs.eax = 0x4f04;
+ task->t.regs.ecx = 0x000f;
+ task->t.regs.edx = 0x0001;
+ task->t.flags = TF_BUF_RET | TF_BUF_ESBX;
+ task->t.buf_len = par->vbe_state_size;
+ task->buf = state;
+ err = uvesafb_exec(task);
+
+ if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
+ printk(KERN_WARNING "uvesafb: VBE get state call "
+ "failed (eax=0x%x, err=%d)\n",
+ task->t.regs.eax, err);
+ kfree(state);
+ state = NULL;
+ }
+
+ uvesafb_free(task);
+ return state;
+}
+
+static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf)
+{
+ struct uvesafb_ktask *task;
+ int err;
+
+ if (!state_buf)
+ return;
+
+ task = uvesafb_prep();
+ if (!task)
+ return;
+
+ task->t.regs.eax = 0x4f04;
+ task->t.regs.ecx = 0x000f;
+ task->t.regs.edx = 0x0002;
+ task->t.buf_len = par->vbe_state_size;
+ task->t.flags = TF_BUF_ESBX;
+ task->buf = state_buf;
+
+ err = uvesafb_exec(task);
+ if (err || (task->t.regs.eax & 0xffff) != 0x004f)
+ printk(KERN_WARNING "uvesafb: VBE state restore call "
+ "failed (eax=0x%x, err=%d)\n",
+ task->t.regs.eax, err);
+
+ uvesafb_free(task);
+}
+
+static int __devinit uvesafb_vbe_getinfo(struct uvesafb_ktask *task,
+ struct uvesafb_par *par)
+{
+ int err;
+
+ task->t.regs.eax = 0x4f00;
+ task->t.flags = TF_VBEIB;
+ task->t.buf_len = sizeof(struct vbe_ib);
+ task->buf = &par->vbe_ib;
+ strncpy(par->vbe_ib.vbe_signature, "VBE2", 4);
+
+ err = uvesafb_exec(task);
+ if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
+ printk(KERN_ERR "uvesafb: Getting VBE info block failed "
+ "(eax=0x%x, err=%d)\n", (u32)task->t.regs.eax,
+ err);
+ return -EINVAL;
+ }
+
+ if (par->vbe_ib.vbe_version < 0x0200) {
+ printk(KERN_ERR "uvesafb: Sorry, pre-VBE 2.0 cards are "
+ "not supported.\n");
+ return -EINVAL;
+ }
+
+ if (!par->vbe_ib.mode_list_ptr) {
+ printk(KERN_ERR "uvesafb: Missing mode list!\n");
+ return -EINVAL;
+ }
+
+ printk(KERN_INFO "uvesafb: ");
+
+ /*
+ * Convert string pointers and the mode list pointer into
+ * usable addresses. Print informational messages about the
+ * video adapter and its vendor.
+ */
+ if (par->vbe_ib.oem_vendor_name_ptr)
+ printk("%s, ",
+ ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr);
+
+ if (par->vbe_ib.oem_product_name_ptr)
+ printk("%s, ",
+ ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr);
+
+ if (par->vbe_ib.oem_product_rev_ptr)
+ printk("%s, ",
+ ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr);
+
+ if (par->vbe_ib.oem_string_ptr)
+ printk("OEM: %s, ",
+ ((char *)task->buf) + par->vbe_ib.oem_string_ptr);
+
+ printk("VBE v%d.%d\n", ((par->vbe_ib.vbe_version & 0xff00) >> 8),
+ par->vbe_ib.vbe_version & 0xff);
+
+ return 0;
+}
+
+static int __devinit uvesafb_vbe_getmodes(struct uvesafb_ktask *task,
+ struct uvesafb_par *par)
+{
+ int off = 0, err;
+ u16 *mode;
+
+ par->vbe_modes_cnt = 0;
+
+ /* Count available modes. */
+ mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
+ while (*mode != 0xffff) {
+ par->vbe_modes_cnt++;
+ mode++;
+ }
+
+ par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) *
+ par->vbe_modes_cnt, GFP_KERNEL);
+ if (!par->vbe_modes)
+ return -ENOMEM;
+
+ /* Get info about all available modes. */
+ mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
+ while (*mode != 0xffff) {
+ struct vbe_mode_ib *mib;
+
+ uvesafb_reset(task);
+ task->t.regs.eax = 0x4f01;
+ task->t.regs.ecx = (u32) *mode;
+ task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
+ task->t.buf_len = sizeof(struct vbe_mode_ib);
+ task->buf = par->vbe_modes + off;
+
+ err = uvesafb_exec(task);
+ if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
+ printk(KERN_ERR "uvesafb: Getting mode info block "
+ "for mode 0x%x failed (eax=0x%x, err=%d)\n",
+ *mode, (u32)task->t.regs.eax, err);
+ return -EINVAL;
+ }
+
+ mib = task->buf;
+ mib->mode_id = *mode;
+
+ /*
+ * We only want modes that are supported with the current
+ * hardware configuration, color, graphics and that have
+ * support for the LFB.
+ */
+ if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK &&
+ mib->bits_per_pixel >= 8)
+ off++;
+ else
+ par->vbe_modes_cnt--;
+
+ mode++;
+ mib->depth = mib->red_len + mib->green_len + mib->blue_len;
+
+ /*
+ * Handle 8bpp modes and modes with broken color component
+ * lengths.
+ */
+ if (mib->depth == 0 || (mib->depth == 24 &&
+ mib->bits_per_pixel == 32))
+ mib->depth = mib->bits_per_pixel;
+ }
+
+ return 0;
+}
+
+/*
+ * The Protected Mode Interface is 32-bit x86 code, so we only run it on
+ * x86 and not x86_64.
+ */
+#ifdef CONFIG_X86_32
+static int __devinit uvesafb_vbe_getpmi(struct uvesafb_ktask *task,
+ struct uvesafb_par *par)
+{
+ int i, err;
+
+ uvesafb_reset(task);
+ task->t.regs.eax = 0x4f0a;
+ task->t.regs.ebx = 0x0;
+ err = uvesafb_exec(task);
+
+ if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) {
+ par->pmi_setpal = par->ypan = 0;
+ } else {
+ par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4)
+ + task->t.regs.edi);
+ par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1];
+ par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2];
+ printk(KERN_INFO "uvesafb: protected mode interface info at "
+ "%04x:%04x\n",
+ (u16)task->t.regs.es, (u16)task->t.regs.edi);
+ printk(KERN_INFO "uvesafb: pmi: set display start = %p, "
+ "set palette = %p\n", par->pmi_start,
+ par->pmi_pal);
+
+ if (par->pmi_base[3]) {
+ printk(KERN_INFO "uvesafb: pmi: ports = ");
+ for (i = par->pmi_base[3]/2;
+ par->pmi_base[i] != 0xffff; i++)
+ printk("%x ", par->pmi_base[i]);
+ printk("\n");
+
+ if (par->pmi_base[i] != 0xffff) {
+ printk(KERN_INFO "uvesafb: can't handle memory"
+ " requests, pmi disabled\n");
+ par->ypan = par->pmi_setpal = 0;
+ }
+ }
+ }
+ return 0;
+}
+#endif /* CONFIG_X86_32 */
+
+/*
+ * Check whether a video mode is supported by the Video BIOS and is
+ * compatible with the monitor limits.
+ */
+static int __devinit uvesafb_is_valid_mode(struct fb_videomode *mode,
+ struct fb_info *info)
+{
+ if (info->monspecs.gtf) {
+ fb_videomode_to_var(&info->var, mode);
+ if (fb_validate_mode(&info->var, info))
+ return 0;
+ }
+
+ if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8,
+ UVESAFB_EXACT_RES) == -1)
+ return 0;
+
+ return 1;
+}
+
+static int __devinit uvesafb_vbe_getedid(struct uvesafb_ktask *task,
+ struct fb_info *info)
+{
+ struct uvesafb_par *par = info->par;
+ int err = 0;
+
+ if (noedid || par->vbe_ib.vbe_version < 0x0300)
+ return -EINVAL;
+
+ task->t.regs.eax = 0x4f15;
+ task->t.regs.ebx = 0;
+ task->t.regs.ecx = 0;
+ task->t.buf_len = 0;
+ task->t.flags = 0;
+
+ err = uvesafb_exec(task);
+
+ if ((task->t.regs.eax & 0xffff) != 0x004f || err)
+ return -EINVAL;
+
+ if ((task->t.regs.ebx & 0x3) == 3) {
+ printk(KERN_INFO "uvesafb: VBIOS/hardware supports both "
+ "DDC1 and DDC2 transfers\n");
+ } else if ((task->t.regs.ebx & 0x3) == 2) {
+ printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC2 "
+ "transfers\n");
+ } else if ((task->t.regs.ebx & 0x3) == 1) {
+ printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC1 "
+ "transfers\n");
+ } else {
+ printk(KERN_INFO "uvesafb: VBIOS/hardware doesn't support "
+ "DDC transfers\n");
+ return -EINVAL;
+ }
+
+ task->t.regs.eax = 0x4f15;
+ task->t.regs.ebx = 1;
+ task->t.regs.ecx = task->t.regs.edx = 0;
+ task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
+ task->t.buf_len = EDID_LENGTH;
+ task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
+
+ err = uvesafb_exec(task);
+
+ if ((task->t.regs.eax & 0xffff) == 0x004f && !err) {
+ fb_edid_to_monspecs(task->buf, &info->monspecs);
+
+ if (info->monspecs.vfmax && info->monspecs.hfmax) {
+ /*
+ * If the maximum pixel clock wasn't specified in
+ * the EDID block, set it to 300 MHz.
+ */
+ if (info->monspecs.dclkmax == 0)
+ info->monspecs.dclkmax = 300 * 1000000;
+ info->monspecs.gtf = 1;
+ }
+ } else {
+ err = -EINVAL;
+ }
+
+ kfree(task->buf);
+ return err;
+}
+
+static void __devinit uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task,
+ struct fb_info *info)
+{
+ struct uvesafb_par *par = info->par;
+ int i;
+
+ memset(&info->monspecs, 0, sizeof(info->monspecs));
+
+ /*
+ * If we don't get all necessary data from the EDID block,
+ * mark it as incompatible with the GTF and set nocrtc so
+ * that we always use the default BIOS refresh rate.
+ */
+ if (uvesafb_vbe_getedid(task, info)) {
+ info->monspecs.gtf = 0;
+ par->nocrtc = 1;
+ }
+
+ /* Kernel command line overrides. */
+ if (maxclk)
+ info->monspecs.dclkmax = maxclk * 1000000;
+ if (maxvf)
+ info->monspecs.vfmax = maxvf;
+ if (maxhf)
+ info->monspecs.hfmax = maxhf * 1000;
+
+ /*
+ * In case DDC transfers are not supported, the user can provide
+ * monitor limits manually. Lower limits are set to "safe" values.
+ */
+ if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
+ info->monspecs.dclkmin = 0;
+ info->monspecs.vfmin = 60;
+ info->monspecs.hfmin = 29000;
+ info->monspecs.gtf = 1;
+ par->nocrtc = 0;
+ }
+
+ if (info->monspecs.gtf)
+ printk(KERN_INFO
+ "uvesafb: monitor limits: vf = %d Hz, hf = %d kHz, "
+ "clk = %d MHz\n", info->monspecs.vfmax,
+ (int)(info->monspecs.hfmax / 1000),
+ (int)(info->monspecs.dclkmax / 1000000));
+ else
+ printk(KERN_INFO "uvesafb: no monitor limits have been set, "
+ "default refresh rate will be used\n");
+
+ /* Add VBE modes to the modelist. */
+ for (i = 0; i < par->vbe_modes_cnt; i++) {
+ struct fb_var_screeninfo var;
+ struct vbe_mode_ib *mode;
+ struct fb_videomode vmode;
+
+ mode = &par->vbe_modes[i];
+ memset(&var, 0, sizeof(var));
+
+ var.xres = mode->x_res;
+ var.yres = mode->y_res;
+
+ fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info);
+ fb_var_to_videomode(&vmode, &var);
+ fb_add_videomode(&vmode, &info->modelist);
+ }
+
+ /* Add valid VESA modes to our modelist. */
+ for (i = 0; i < VESA_MODEDB_SIZE; i++) {
+ if (uvesafb_is_valid_mode((struct fb_videomode *)
+ &vesa_modes[i], info))
+ fb_add_videomode(&vesa_modes[i], &info->modelist);
+ }
+
+ for (i = 0; i < info->monspecs.modedb_len; i++) {
+ if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info))
+ fb_add_videomode(&info->monspecs.modedb[i],
+ &info->modelist);
+ }
+
+ return;
+}
+
+static void __devinit uvesafb_vbe_getstatesize(struct uvesafb_ktask *task,
+ struct uvesafb_par *par)
+{
+ int err;
+
+ uvesafb_reset(task);
+
+ /*
+ * Get the VBE state buffer size. We want all available
+ * hardware state data (CL = 0x0f).
+ */
+ task->t.regs.eax = 0x4f04;
+ task->t.regs.ecx = 0x000f;
+ task->t.regs.edx = 0x0000;
+ task->t.flags = 0;
+
+ err = uvesafb_exec(task);
+
+ if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
+ printk(KERN_WARNING "uvesafb: VBE state buffer size "
+ "cannot be determined (eax=0x%x, err=%d)\n",
+ task->t.regs.eax, err);
+ par->vbe_state_size = 0;
+ return;
+ }
+
+ par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff);
+}
+
+static int __devinit uvesafb_vbe_init(struct fb_info *info)
+{
+ struct uvesafb_ktask *task = NULL;
+ struct uvesafb_par *par = info->par;
+ int err;
+
+ task = uvesafb_prep();
+ if (!task)
+ return -ENOMEM;
+
+ err = uvesafb_vbe_getinfo(task, par);
+ if (err)
+ goto out;
+
+ err = uvesafb_vbe_getmodes(task, par);
+ if (err)
+ goto out;
+
+ par->nocrtc = nocrtc;
+#ifdef CONFIG_X86_32
+ par->pmi_setpal = pmi_setpal;
+ par->ypan = ypan;
+
+ if (par->pmi_setpal || par->ypan)
+ uvesafb_vbe_getpmi(task, par);
+#else
+ /* The protected mode interface is not available on non-x86. */
+ par->pmi_setpal = par->ypan = 0;
+#endif
+
+ INIT_LIST_HEAD(&info->modelist);
+ uvesafb_vbe_getmonspecs(task, info);
+ uvesafb_vbe_getstatesize(task, par);
+
+out: uvesafb_free(task);
+ return err;
+}
+
+static int __devinit uvesafb_vbe_init_mode(struct fb_info *info)
+{
+ struct list_head *pos;
+ struct fb_modelist *modelist;
+ struct fb_videomode *mode;
+ struct uvesafb_par *par = info->par;
+ int i, modeid;
+
+ /* Has the user requested a specific VESA mode? */
+ if (vbemode) {
+ for (i = 0; i < par->vbe_modes_cnt; i++) {
+ if (par->vbe_modes[i].mode_id == vbemode) {
+ fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
+ &info->var, info);
+ /*
+ * With pixclock set to 0, the default BIOS
+ * timings will be used in set_par().
+ */
+ info->var.pixclock = 0;
+ modeid = i;
+ goto gotmode;
+ }
+ }
+ printk(KERN_INFO "uvesafb: requested VBE mode 0x%x is "
+ "unavailable\n", vbemode);
+ vbemode = 0;
+ }
+
+ /* Count the modes in the modelist */
+ i = 0;
+ list_for_each(pos, &info->modelist)
+ i++;
+
+ /*
+ * Convert the modelist into a modedb so that we can use it with
+ * fb_find_mode().
+ */
+ mode = kzalloc(i * sizeof(*mode), GFP_KERNEL);
+ if (mode) {
+ i = 0;
+ list_for_each(pos, &info->modelist) {
+ modelist = list_entry(pos, struct fb_modelist, list);
+ mode[i] = modelist->mode;
+ i++;
+ }
+
+ if (!mode_option)
+ mode_option = UVESAFB_DEFAULT_MODE;
+
+ i = fb_find_mode(&info->var, info, mode_option, mode, i,
+ NULL, 8);
+
+ kfree(mode);
+ }
+
+ /* fb_find_mode() failed */
+ if (i == 0 || i >= 3) {
+ info->var.xres = 640;
+ info->var.yres = 480;
+ mode = (struct fb_videomode *)
+ fb_find_best_mode(&info->var, &info->modelist);
+
+ if (mode) {
+ fb_videomode_to_var(&info->var, mode);
+ } else {
+ modeid = par->vbe_modes[0].mode_id;
+ fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
+ &info->var, info);
+ goto gotmode;
+ }
+ }
+
+ /* Look for a matching VBE mode. */
+ modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres,
+ info->var.bits_per_pixel, UVESAFB_EXACT_RES);
+
+ if (modeid == -1)
+ return -EINVAL;
+
+gotmode:
+ uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]);
+
+ /*
+ * If we are not VBE3.0+ compliant, we're done -- the BIOS will
+ * ignore our timings anyway.
+ */
+ if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc)
+ fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
+ &info->var, info);
+
+ return modeid;
+}
+
+static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count,
+ int start, struct fb_info *info)
+{
+ struct uvesafb_ktask *task;
+ struct uvesafb_par *par = info->par;
+ int i = par->mode_idx;
+ int err = 0;
+
+ /*
+ * We support palette modifications for 8 bpp modes only, so
+ * there can never be more than 256 entries.
+ */
+ if (start + count > 256)
+ return -EINVAL;
+
+#ifdef CONFIG_X86
+ /* Use VGA registers if mode is VGA-compatible. */
+ if (i >= 0 && i < par->vbe_modes_cnt &&
+ par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
+ for (i = 0; i < count; i++) {
+ outb_p(start + i, dac_reg);
+ outb_p(entries[i].red, dac_val);
+ outb_p(entries[i].green, dac_val);
+ outb_p(entries[i].blue, dac_val);
+ }
+ }
+#ifdef CONFIG_X86_32
+ else if (par->pmi_setpal) {
+ __asm__ __volatile__(
+ "call *(%%esi)"
+ : /* no return value */
+ : "a" (0x4f09), /* EAX */
+ "b" (0), /* EBX */
+ "c" (count), /* ECX */
+ "d" (start), /* EDX */
+ "D" (entries), /* EDI */
+ "S" (&par->pmi_pal)); /* ESI */
+ }
+#endif /* CONFIG_X86_32 */
+ else
+#endif /* CONFIG_X86 */
+ {
+ task = uvesafb_prep();
+ if (!task)
+ return -ENOMEM;
+
+ task->t.regs.eax = 0x4f09;
+ task->t.regs.ebx = 0x0;
+ task->t.regs.ecx = count;
+ task->t.regs.edx = start;
+ task->t.flags = TF_BUF_ESDI;
+ task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count;
+ task->buf = entries;
+
+ err = uvesafb_exec(task);
+ if ((task->t.regs.eax & 0xffff) != 0x004f)
+ err = 1;
+
+ uvesafb_free(task);
+ }
+ return err;
+}
+
+static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
+ unsigned blue, unsigned transp,
+ struct fb_info *info)
+{
+ struct uvesafb_pal_entry entry;
+ int shift = 16 - info->var.green.length;
+ int err = 0;
+
+ if (regno >= info->cmap.len)
+ return -EINVAL;
+
+ if (info->var.bits_per_pixel == 8) {
+ entry.red = red >> shift;
+ entry.green = green >> shift;
+ entry.blue = blue >> shift;
+ entry.pad = 0;
+
+ err = uvesafb_setpalette(&entry, 1, regno, info);
+ } else if (regno < 16) {
+ switch (info->var.bits_per_pixel) {
+ case 16:
+ if (info->var.red.offset == 10) {
+ /* 1:5:5:5 */
+ ((u32 *) (info->pseudo_palette))[regno] =
+ ((red & 0xf800) >> 1) |
+ ((green & 0xf800) >> 6) |
+ ((blue & 0xf800) >> 11);
+ } else {
+ /* 0:5:6:5 */
+ ((u32 *) (info->pseudo_palette))[regno] =
+ ((red & 0xf800) ) |
+ ((green & 0xfc00) >> 5) |
+ ((blue & 0xf800) >> 11);
+ }
+ break;
+
+ case 24:
+ case 32:
+ red >>= 8;
+ green >>= 8;
+ blue >>= 8;
+ ((u32 *)(info->pseudo_palette))[regno] =
+ (red << info->var.red.offset) |
+ (green << info->var.green.offset) |
+ (blue << info->var.blue.offset);
+ break;
+ }
+ }
+ return err;
+}
+
+static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
+{
+ struct uvesafb_pal_entry *entries;
+ int shift = 16 - info->var.green.length;
+ int i, err = 0;
+
+ if (info->var.bits_per_pixel == 8) {
+ if (cmap->start + cmap->len > info->cmap.start +
+ info->cmap.len || cmap->start < info->cmap.start)
+ return -EINVAL;
+
+ entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL);
+ if (!entries)
+ return -ENOMEM;
+
+ for (i = 0; i < cmap->len; i++) {
+ entries[i].red = cmap->red[i] >> shift;
+ entries[i].green = cmap->green[i] >> shift;
+ entries[i].blue = cmap->blue[i] >> shift;
+ entries[i].pad = 0;
+ }
+ err = uvesafb_setpalette(entries, cmap->len, cmap->start, info);
+ kfree(entries);
+ } else {
+ /*
+ * For modes with bpp > 8, we only set the pseudo palette in
+ * the fb_info struct. We rely on uvesafb_setcolreg to do all
+ * sanity checking.
+ */
+ for (i = 0; i < cmap->len; i++) {
+ err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i],
+ cmap->green[i], cmap->blue[i],
+ 0, info);
+ }
+ }
+ return err;
+}
+
+static int uvesafb_pan_display(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+#ifdef CONFIG_X86_32
+ int offset;
+ struct uvesafb_par *par = info->par;
+
+ offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
+
+ /*
+ * It turns out it's not the best idea to do panning via vm86,
+ * so we only allow it if we have a PMI.
+ */
+ if (par->pmi_start) {
+ __asm__ __volatile__(
+ "call *(%%edi)"
+ : /* no return value */
+ : "a" (0x4f07), /* EAX */
+ "b" (0), /* EBX */
+ "c" (offset), /* ECX */
+ "d" (offset >> 16), /* EDX */
+ "D" (&par->pmi_start)); /* EDI */
+ }
+#endif
+ return 0;
+}
+
+static int uvesafb_blank(int blank, struct fb_info *info)
+{
+ struct uvesafb_par *par = info->par;
+ struct uvesafb_ktask *task;
+ int err = 1;
+
+#ifdef CONFIG_X86
+ if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
+ int loop = 10000;
+ u8 seq = 0, crtc17 = 0;
+
+ if (blank == FB_BLANK_POWERDOWN) {
+ seq = 0x20;
+ crtc17 = 0x00;
+ err = 0;
+ } else {
+ seq = 0x00;
+ crtc17 = 0x80;
+ err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
+ }
+
+ vga_wseq(NULL, 0x00, 0x01);
+ seq |= vga_rseq(NULL, 0x01) & ~0x20;
+ vga_wseq(NULL, 0x00, seq);
+
+ crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
+ while (loop--);
+ vga_wcrt(NULL, 0x17, crtc17);
+ vga_wseq(NULL, 0x00, 0x03);
+ } else
+#endif /* CONFIG_X86 */
+ {
+ task = uvesafb_prep();
+ if (!task)
+ return -ENOMEM;
+
+ task->t.regs.eax = 0x4f10;
+ switch (blank) {
+ case FB_BLANK_UNBLANK:
+ task->t.regs.ebx = 0x0001;
+ break;
+ case FB_BLANK_NORMAL:
+ task->t.regs.ebx = 0x0101; /* standby */
+ break;
+ case FB_BLANK_POWERDOWN:
+ task->t.regs.ebx = 0x0401; /* powerdown */
+ break;
+ default:
+ goto