| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20070630163533.GE3838@spock.one.pl>
Date: Sat, 30 Jun 2007 18:35:33 +0200
From: Michal Januszewski <spock@...too.org>
To: linux-fbdev-devel@...ts.sourceforge.net
Cc: linux-kernel@...r.kernel.org, hpa@...or.com
Subject: [PATCH v2 4/5] uvesafb: the driver core
uvesafb is an enhanced version of vesafb. It uses a userspace
helper (v86d) to execute calls to the x86 Video BIOS functions.
The driver is not limited to any specific arch and whether it works
on a given arch or not depends on that arch being supported by the
userspace daemon. It has been tested on x86_32 and x86_64.
A single BIOS call is represented by an instance of the uvesafb_ktask
structure. This structure contains a buffer, a completion struct and a
uvesafb_task substructure, containing the values of the x86 registers,
a flags field and a field indicating the length of the buffer. Whenever
a BIOS call is made in the driver, uvesafb_exec() builds a message using
the uvesafb_task substructure and the contents of the buffer. This
message is then assigned a random ack number and sent to the userspace
daemon using the connector interface.
The message's sequence number is used as an index for the uvfb_tasks
array, which provides a mapping from the messages coming from userspace
to the in-kernel uvesafb_ktask structs.
The userspace daemon performs the requested operation and sends a
reply in the form of a uvesafb_task struct and, optionally, a buffer.
The seq and ack numbers in the reply should be exactly the same as
those in the request.
Each message from userspace is processed by uvesafb_cn_callback()
and after passing a few sanity checks leads to the completion of a
BIOS call request.
Signed-off-by: Michal Januszewski <spock@...too.org>
---
drivers/video/Kconfig | 18 +
drivers/video/Makefile | 1 +
drivers/video/uvesafb.c | 2032 +++++++++++++++++++++++++++++++++++++++++++++++
include/video/Kbuild | 2 +-
include/video/uvesafb.h | 193 +++++
5 files changed, 2245 insertions(+), 1 deletions(-)
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 403dac7..5cc03f9 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -585,6 +585,24 @@ 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 bd8b052..b7da8c0 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -115,6 +115,7 @@ obj-$(CONFIG_FB_SM501) += sm501fb.o
obj-$(CONFIG_FB_XILINX) += xilinxfb.o
# 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 0000000..9c21791
--- /dev/null
+++ b/drivers/video/uvesafb.c
@@ -0,0 +1,2032 @@
+/*
+ * A framebuffer driver for VBE 2.0+ compliant video cards
+ *
+ * (c) 2007 Michal Januszewski <spock@...too.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/vga.h>
+#include <video/uvesafb.h>
+#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,
+};
+
+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));
+
+ 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 "vesafb: 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.
+ */
+ if (uvesafb_vbe_getedid(task, info))
+ info->monspecs.gtf = 0;
+
+ /* 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;
+ }
+
+ 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\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)
+ 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;
+
+ /* 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
+ else {
+ 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;
+
+ 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 {
+ 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 out;
+ }
+
+ err = uvesafb_exec(task);
+ if (err || (task->t.regs.eax & 0xffff) != 0x004f)
+ err = 1;
+out: uvesafb_free(task);
+ }
+ return err;
+}
+
+static int uvesafb_open(struct fb_info *info, int user)
+{
+ struct uvesafb_par *par = info->par;
+ int cnt = atomic_read(&par->ref_count);
+
+ if (!cnt && par->vbe_state_size)
+ par->vbe_state_orig = uvesafb_vbe_state_save(par);
+
+ atomic_inc(&par->ref_count);
+ return 0;
+}
+
+static int uvesafb_release(struct fb_info *info, int user)
+{
+ struct uvesafb_ktask *task = NULL;
+ struct uvesafb_par *par = info->par;
+ int cnt = atomic_read(&par->ref_count);
+
+ if (!cnt)
+ return -EINVAL;
+
+ if (cnt != 1)
+ goto out;
+
+ task = uvesafb_prep();
+ if (!task)
+ goto out;
+
+ /* First, try to set the standard 80x25 text mode. */
+ task->t.regs.eax = 0x0003;
+ uvesafb_exec(task);
+
+ /*
+ * Now try to restore whatever hardware state we might have
+ * saved when the fb device was first opened.
+ */
+ uvesafb_vbe_state_restore(par, par->vbe_state_orig);
+out:
+ atomic_dec(&par->ref_count);
+ if (task)
+ uvesafb_free(task);
+ return 0;
+}
+
+static int uvesafb_set_par(struct fb_info *info)
+{
+ struct uvesafb_par *par = info->par;
+ struct uvesafb_ktask *task = NULL;
+ struct vbe_crtc_ib *crtc = NULL;
+ struct vbe_mode_ib *mode = NULL;
+ int i, err = 0, depth = info->var.bits_per_pixel;
+
+ if (depth > 8 && depth != 32)
+ depth = info->var.red.length + info->var.green.length +
+ info->var.blue.length;
+
+ i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
+ UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
+ if (i >= 0)
+ mode = &par->vbe_modes[i];
+ else
+ return -EINVAL;
+
+ task = uvesafb_prep();
+ if (!task)
+ return -ENOMEM;
+ task->t.regs.eax = 0x4f02;
+ task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */
+
+ if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
+ info->var.pixclock != 0) {
+ task->t.regs.ebx |= 0x0800; /* use CRTC data */
+ task->t.flags = TF_BUF_ESDI;
+ crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
+ if (!crtc) {
+ err = -ENOMEM;
+ goto out;
+ }
+ crtc->horiz_start = info->var.xres + info->var.right_margin;
+ crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
+ crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
+
+ crtc->vert_start = info->var.yres + info->var.lower_margin;
+ crtc->vert_end = crtc->vert_start + info->var.vsync_len;
+ crtc->vert_total = crtc->vert_end + info->var.upper_margin;
+
+ crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
+ crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
+ (crtc->vert_total * crtc->horiz_total)));
+
+ if (info->var.vmode & FB_VMODE_DOUBLE)
+ crtc->flags |= 0x1;
+ if (info->var.vmode & FB_VMODE_INTERLACED)
+ crtc->flags |= 0x2;
+ if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
+ crtc->flags |= 0x4;
+ if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
+ crtc->flags |= 0x8;
+ memcpy(&par->crtc, crtc, sizeof(*crtc));
+ } else {
+ memset(&par->crtc, 0, sizeof(*crtc));
+ }
+
+ task->t.buf_len = sizeof(struct vbe_crtc_ib);
+ task->buf = &par->crtc;
+
+ err = uvesafb_exec(task);
+ if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
+ printk(KERN_ERR "uvesafb: mode switch failed (eax=0x%x, "
+ "err=%d)\n", task->t.regs.eax, err);
+ err = -EINVAL;
+ goto out;
+ }
+ par->mode_idx = i;
+
+ /* For 8bpp modes, always try to set the DAC to 8 bits. */
+ if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
+ mode->bits_per_pixel <= 8) {
+ uvesafb_reset(task);
+ task->t.regs.eax = 0x4f08;
+ task->t.regs.ebx = 0x0800;
+
+ err = uvesafb_exec(task);
+ if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
+ ((task->t.regs.ebx & 0xff00) >> 8) != 8) {
+ /*
+ * We've failed to set the DAC palette format -
+ * time to correct var.
+ */
+ info->var.red.length = 6;
+ info->var.green.length = 6;
+ info->var.blue.length = 6;
+ }
+ }
+
+ info->fix.visual = (info->var.bits_per_pixel == 8) ?
+ FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
+ info->fix.line_length = mode->bytes_per_scan_line;
+
+out: if (crtc != NULL)
+ kfree(crtc);
+ uvesafb_free(task);
+
+ return err;
+}
+
+static void uvesafb_check_limits(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+ const struct fb_videomode *mode;
+ struct uvesafb_par *par = info->par;
+
+ /*
+ * If pixclock is set to 0, then we're using default BIOS timings
+ * and thus don't have to perform any checks here.
+ */
+ if (!var->pixclock)
+ return;
+
+ if (par->vbe_ib.vbe_version < 0x0300) {
+ fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
+ return;
+ }
+
+ if (!fb_validate_mode(var, info))
+ return;
+
+ mode = fb_find_best_mode(var, &info->modelist);
+ if (mode) {
+ if (mode->xres == var->xres && mode->yres == var->yres &&
+ !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
+ fb_videomode_to_var(var, mode);
+ return;
+ }
+ }
+
+ if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
+ return;
+ /* Use default refresh rate */
+ var->pixclock = 0;
+}
+
+static int uvesafb_check_var(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+ struct uvesafb_par *par = info->par;
+ struct vbe_mode_ib *mode = NULL;
+ int match = -1;
+ int depth = var->red.length + var->green.length + var->blue.length;
+
+ /*
+ * Various apps will use bits_per_pixel to set the color depth,
+ * which is theoretically incorrect, but which we'll try to handle
+ * here.
+ */
+ if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
+ depth = var->bits_per_pixel;
+
+ match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth,
+ UVESAFB_EXACT_RES);
+ if (match == -1)
+ return -EINVAL;
+
+ mode = &par->vbe_modes[match];
+ uvesafb_setup_var(var, info, mode);
+
+ /*
+ * Check whether we have remapped enough memory for this mode.
+ * We might be called at an early stage, when we haven't remapped
+ * any memory yet, in which case we simply skip the check.
+ */
+ if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len
+ && info->fix.smem_len)
+ return -EINVAL;
+
+ if ((var->vmode & FB_VMODE_DOUBLE) &&
+ !(par->vbe_modes[match].mode_attr & 0x100))
+ var->vmode &= ~FB_VMODE_DOUBLE;
+
+ if ((var->vmode & FB_VMODE_INTERLACED) &&
+ !(par->vbe_modes[match].mode_attr & 0x200))
+ var->vmode &= ~FB_VMODE_INTERLACED;
+
+ uvesafb_check_limits(var, info);
+
+ var->xres_virtual = var->xres;
+ var->yres_virtual = (par->ypan) ?
+ info->fix.smem_len / mode->bytes_per_scan_line :
+ var->yres;
+ return 0;
+}
+
+static void uvesafb_save_state(struct fb_info *info)
+{
+ struct uvesafb_par *par = info->par;
+
+ if (par->vbe_state_saved)
+ kfree(par->vbe_state_saved);
+
+ par->vbe_state_saved = uvesafb_vbe_state_save(par);
+}
+
+static void uvesafb_restore_state(struct fb_info *info)
+{
+ struct uvesafb_par *par = info->par;
+
+ uvesafb_vbe_state_restore(par, par->vbe_state_saved);
+}
+
+static struct fb_ops uvesafb_ops = {
+ .owner = THIS_MODULE,
+ .fb_open = uvesafb_open,
+ .fb_release = uvesafb_release,
+ .fb_setcolreg = uvesafb_setcolreg,
+ .fb_setcmap = uvesafb_setcmap,
+ .fb_pan_display = uvesafb_pan_display,
+ .fb_blank = uvesafb_blank,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_check_var = uvesafb_check_var,
+ .fb_set_par = uvesafb_set_par,
+ .fb_save_state = uvesafb_save_state,
+ .fb_restore_state = uvesafb_restore_state,
+};
+
+static void __devinit uvesafb_init_info(struct fb_info *info,
+ struct vbe_mode_ib *mode)
+{
+ unsigned int size_vmode;
+ unsigned int size_remap;
+ unsigned int size_total;
+ struct uvesafb_par *par = info->par;
+ int i, h;
+
+ info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
+ info->fix = uvesafb_fix;
+ info->fix.ypanstep = par->ypan ? 1 : 0;
+ info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
+
+ /*
+ * If we were unable to get the state buffer size, disable
+ * functions for saving and restoring the hardware state.
+ */
+ if (par->vbe_state_size == 0) {
+ info->fbops->fb_save_state = NULL;
+ info->fbops->fb_restore_state = NULL;
+ }
+
+ /* Disable blanking if the user requested so. */
+ if (!blank)
+ info->fbops->fb_blank = NULL;
+
+ /*
+ * Find out how much IO memory is required for the mode with
+ * the highest resolution.
+ */
+ size_remap = 0;
+ for (i = 0; i < par->vbe_modes_cnt; i++) {
+ h = par->vbe_modes[i].bytes_per_scan_line *
+ par->vbe_modes[i].y_res;
+ if (h > size_remap)
+ size_remap = h;
+ }
+ size_remap *= 2;
+
+ /*
+ * size_vmode -- that is the amount of memory needed for the
+ * used video mode, i.e. the minimum amount of
+ * memory we need.
+ */
+ if (mode != NULL) {
+ size_vmode = info->var.yres * mode->bytes_per_scan_line;
+ } else {
+ size_vmode = info->var.yres * info->var.xres *
+ ((info->var.bits_per_pixel + 7) >> 3);
+ }
+
+ /*
+ * size_total -- all video memory we have. Used for mtrr
+ * entries, resource allocation and bounds
+ * checking.
+ */
+ size_total = par->vbe_ib.total_memory * 65536;
+ if (vram_total)
+ size_total = vram_total * 1024 * 1024;
+ if (size_total < size_vmode)
+ size_total = size_vmode;
+
+ /*
+ * size_remap -- the amount of video memory we are going to
+ * use for vesafb. With modern cards it is no
+ * option to simply use size_total as th
+ * wastes plenty of kernel address space.
+ */
+ if (vram_remap)
+ size_remap = vram_remap * 1024 * 1024;
+ if (size_remap < size_vmode)
+ size_remap = size_vmode;
+ if (size_remap > size_total)
+ size_remap = size_total;
+
+ info->fix.smem_len = size_remap;
+ info->fix.smem_start = mode->phys_base_ptr;
+
+ /*
+ * We have to set yres_virtual here because when setup_var() was
+ * called, smem_len wasn't defined yet.
+ */
+ info->var.yres_virtual = info->fix.smem_len /
+ mode->bytes_per_scan_line;
+
+ if (par->ypan && info->var.yres_virtual > info->var.yres) {
+ printk(KERN_INFO "uvesafb: scrolling: %s "
+ "using protected mode interface, "
+ "yres_virtual=%d\n",
+ (par->ypan > 1) ? "ywrap" : "ypan",
+ info->var.yres_virtual);
+ } else {
+ printk(KERN_INFO "uvesafb: scrolling: redraw\n");
+ info->var.yres_virtual = info->var.yres;
+ par->ypan = 0;
+ }
+
+ info->flags = FBINFO_FLAG_DEFAULT |
+ (par->ypan) ? FBINFO_HWACCEL_YPAN : 0;
+
+ if (!par->ypan)
+ info->fbops->fb_pan_display = NULL;
+}
+
+static void uvesafb_init_mtrr(struct fb_info *info)
+{
+#ifdef CONFIG_MTRR
+ if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
+ int temp_size = info->fix.smem_len;
+ unsigned int type = 0;
+
+ switch (mtrr) {
+ case 1:
+ type = MTRR_TYPE_UNCACHABLE;
+ break;
+ case 2:
+ type = MTRR_TYPE_WRBACK;
+ break;
+ case 3:
+ type = MTRR_TYPE_WRCOMB;
+ break;
+ case 4:
+ type = MTRR_TYPE_WRTHROUGH;
+ break;
+ default:
+ type = 0;
+ break;
+ }
+
+ if (type) {
+ int rc;
+
+ /* Find the largest power-of-two */
+ while (temp_size & (temp_size - 1))
+ temp_size &= (temp_size - 1);
+
+ /* Try and find a power of two to add */
+ do {
+ rc = mtrr_add(info->fix.smem_start,
+ temp_size, type, 1);
+ temp_size >>= 1;
+ } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
+ }
+ }
+#endif /* CONFIG_MTRR */
+}
+
+
+static ssize_t uvesafb_show_vbe_ver(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
+ struct uvesafb_par *par = info->par;
+
+ return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
+}
+
+static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
+
+static ssize_t uvesafb_show_vbe_modes(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
+ struct uvesafb_par *par = info->par;
+ int ret = 0, i;
+
+ for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
+ ret += snprintf(buf + ret, PAGE_SIZE - ret,
+ "%dx%d-%d, 0x%.4x\n",
+ par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
+ par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
+ }
+
+ return ret;
+}
+
+static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
+
+static ssize_t uvesafb_show_vendor(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
+ struct uvesafb_par *par = info->par;
+
+ if (par->vbe_ib.oem_vendor_name_ptr)
+ return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
+ (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
+ else
+ return 0;
+}
+
+static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
+
+static ssize_t uvesafb_show_product_name(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
+ struct uvesafb_par *par = info->par;
+
+ if (par->vbe_ib.oem_product_name_ptr)
+ return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
+ (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
+ else
+ return 0;
+}
+
+static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
+
+static ssize_t uvesafb_show_product_rev(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
+ struct uvesafb_par *par = info->par;
+
+ if (par->vbe_ib.oem_product_rev_ptr)
+ return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
+ (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
+ else
+ return 0;
+}
+
+static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
+
+static ssize_t uvesafb_show_oem_string(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
+ struct uvesafb_par *par = info->par;
+
+ if (par->vbe_ib.oem_string_ptr)
+ return snprintf(buf, PAGE_SIZE, "%s\n",
+ (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
+ else
+ return 0;
+}
+
+static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
+
+static ssize_t uvesafb_show_nocrtc(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
+ struct uvesafb_par *par = info->par;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
+}
+
+static ssize_t uvesafb_store_nocrtc(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
+ struct uvesafb_par *par = info->par;
+
+ if (count > 0) {
+ if (buf[0] == '0')
+ par->nocrtc = 0;
+ else
+ par->nocrtc = 1;
+ }
+ return count;
+}
+
+static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
+ uvesafb_store_nocrtc);
+
+static struct attribute *uvesafb_dev_attrs[] = {
+ &dev_attr_vbe_version.attr,
+ &dev_attr_vbe_modes.attr,
+ &dev_attr_oem_vendor.attr,
+ &dev_attr_oem_product_name.attr,
+ &dev_attr_oem_product_rev.attr,
+ &dev_attr_oem_string.attr,
+ &dev_attr_nocrtc.attr,
+ NULL,
+};
+
+static struct attribute_group uvesafb_dev_attgrp = {
+ .name = NULL,
+ .attrs = uvesafb_dev_attrs,
+};
+
+static int __devinit uvesafb_probe(struct platform_device *dev)
+{
+ struct fb_info *info;
+ struct vbe_mode_ib *mode = NULL;
+ struct uvesafb_par *par;
+ int err = 0, i;
+
+ info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev);
+ if (!info)
+ return -ENOMEM;
+
+ par = info->par;
+
+ err = uvesafb_vbe_init(info);
+ if (err) {
+ printk(KERN_ERR "uvesafb: vbe_init() failed with %d\n", err);
+ goto out;
+ }
+
+ info->fbops = &uvesafb_ops;
+
+ i = uvesafb_vbe_init_mode(info);
+ if (i < 0) {
+ err = -EINVAL;
+ goto out;
+ } else {
+ mode = &par->vbe_modes[i];
+ }
+
+ if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
+ err = -ENXIO;
+ goto out;
+ }
+
+ uvesafb_init_info(info, mode);
+
+ if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
+ "uvesafb")) {
+ printk(KERN_ERR "uvesafb: cannot reserve video memory at "
+ "0x%lx\n", info->fix.smem_start);
+ err = -EIO;
+ goto out_mode;
+ }
+
+ info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
+
+ if (!info->screen_base) {
+ printk(KERN_ERR
+ "uvesafb: abort, cannot ioremap 0x%x bytes of video "
+ "memory at 0x%lx\n",
+ info->fix.smem_len, info->fix.smem_start);
+ err = -EIO;
+ goto out_mem;
+ }
+
+ if (!request_region(0x3c0, 32, "uvesafb")) {
+ printk(KERN_ERR "uvesafb: request region 0x3c0-0x3e0 failed\n");
+ err = -EIO;
+ goto out_unmap;
+ }
+
+ uvesafb_init_mtrr(info);
+ platform_set_drvdata(dev, info);
+
+ if (register_framebuffer(info) < 0) {
+ printk(KERN_ERR
+ "uvesafb: failed to register framebuffer device\n");
+ err = -EINVAL;
+ goto out_reg;
+ }
+
+ printk(KERN_INFO "uvesafb: framebuffer at 0x%lx, mapped to 0x%p, "
+ "using %dk, total %dk\n", info->fix.smem_start,
+ info->screen_base, info->fix.smem_len/1024,
+ par->vbe_ib.total_memory * 64);
+ printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
+ info->fix.id);
+
+ err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
+ if (err != 0)
+ printk(KERN_WARNING "fb%d: failed to register attributes\n",
+ info->node);
+
+ return 0;
+
+out_reg:
+ release_region(0x3c0, 32);
+out_unmap:
+ iounmap(info->screen_base);
+out_mem:
+ release_mem_region(info->fix.smem_start, info->fix.smem_len);
+out_mode:
+ if (!list_empty(&info->modelist))
+ fb_destroy_modelist(&info->modelist);
+ fb_destroy_modedb(info->monspecs.modedb);
+ fb_dealloc_cmap(&info->cmap);
+out:
+ if (par->vbe_modes)
+ kfree(par->vbe_modes);
+
+ framebuffer_release(info);
+ return err;
+}
+
+static int uvesafb_remove(struct platform_device *dev)
+{
+ struct fb_info *info = platform_get_drvdata(dev);
+
+ if (info) {
+ struct uvesafb_par *par = info->par;
+
+ sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
+ unregister_framebuffer(info);
+ release_region(0x3c0, 32);
+ iounmap(info->screen_base);
+ release_mem_region(info->fix.smem_start, info->fix.smem_len);
+ fb_destroy_modedb(info->monspecs.modedb);
+ fb_dealloc_cmap(&info->cmap);
+
+ if (par) {
+ if (par->vbe_modes)
+ kfree(par->vbe_modes);
+ if (par->vbe_state_orig)
+ kfree(par->vbe_state_orig);
+ if (par->vbe_state_saved)
+ kfree(par->vbe_state_saved);
+ }
+
+ framebuffer_release(info);
+ }
+ return 0;
+}
+
+static struct platform_driver uvesafb_driver = {
+ .probe = uvesafb_probe,
+ .remove = uvesafb_remove,
+ .driver = {
+ .name = "uvesafb",
+ },
+};
+
+static struct platform_device *uvesafb_device;
+
+#ifndef MODULE
+static int __devinit uvesafb_setup(char *options)
+{
+ char *this_opt;
+
+ if (!options || !*options)
+ return 0;
+
+ while ((this_opt = strsep(&options, ",")) != NULL) {
+ if (!*this_opt) continue;
+
+ if (!strcmp(this_opt, "redraw"))
+ ypan = 0;
+ else if (!strcmp(this_opt, "ypan"))
+ ypan = 1;
+ else if (!strcmp(this_opt, "ywrap"))
+ ypan = 2;
+ else if (!strcmp(this_opt, "vgapal"))
+ pmi_setpal = 0;
+ else if (!strcmp(this_opt, "pmipal"))
+ pmi_setpal = 1;
+ else if (!strncmp(this_opt, "mtrr:", 5))
+ mtrr = simple_strtoul(this_opt+5, NULL, 0);
+ else if (!strcmp(this_opt, "nomtrr"))
+ mtrr = 0;
+ else if (!strcmp(this_opt, "nocrtc"))
+ nocrtc = 1;
+ else if (!strcmp(this_opt, "noedid"))
+ noedid = 1;
+ else if (!strcmp(this_opt, "noblank"))
+ blank = 0;
+ else if (!strncmp(this_opt, "vtotal:", 7))
+ vram_total = simple_strtoul(this_opt + 7, NULL, 0);
+ else if (!strncmp(this_opt, "vremap:", 7))
+ vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
+ else if (!strncmp(this_opt, "maxhf:", 6))
+ maxhf = simple_strtoul(this_opt + 6, NULL, 0);
+ else if (!strncmp(this_opt, "maxvf:", 6))
+ maxvf = simple_strtoul(this_opt + 6, NULL, 0);
+ else if (!strncmp(this_opt, "maxclk:", 7))
+ maxclk = simple_strtoul(this_opt + 7, NULL, 0);
+ else if (!strncmp(this_opt, "vbemode:", 8))
+ vbemode = simple_strtoul(this_opt + 8, NULL, 0);
+ else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
+ mode_option = this_opt;
+ } else {
+ printk(KERN_WARNING
+ "uvesafb: unrecognized option %s\n", this_opt);
+ }
+ }
+
+ return 0;
+}
+#endif /* !MODULE */
+
+static ssize_t show_v86d(struct device_driver *dev, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
+}
+
+static ssize_t store_v86d(struct device_driver *dev, const char *buf,
+ size_t count)
+{
+ strncpy(v86d_path, buf, PATH_MAX);
+ return count;
+}
+
+static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d);
+
+static int __devinit uvesafb_init(void)
+{
+ int err;
+
+#ifndef MODULE
+ char *option = NULL;
+
+ if (fb_get_options("uvesafb", &option))
+ return -ENODEV;
+ uvesafb_setup(option);
+#endif
+ err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
+ if (err)
+ return err;
+
+ err = platform_driver_register(&uvesafb_driver);
+
+ if (!err) {
+ uvesafb_device = platform_device_alloc("uvesafb", 0);
+ if (uvesafb_device)
+ err = platform_device_add(uvesafb_device);
+ else
+ err = -ENOMEM;
+
+ if (err) {
+ platform_device_put(uvesafb_device);
+ platform_driver_unregister(&uvesafb_driver);
+ cn_del_callback(&uvesafb_cn_id);
+ return err;
+ }
+
+ err = driver_create_file(&uvesafb_driver.driver,
+ &driver_attr_v86d);
+ if (err) {
+ printk(KERN_WARNING "uvesafb: failed to register "
+ "attributes\n");
+ err = 0;
+ }
+ }
+ return err;
+}
+
+module_init(uvesafb_init);
+
+static void __devexit uvesafb_exit(void)
+{
+ struct uvesafb_ktask *task;
+
+ if (v86d_started) {
+ task = uvesafb_prep();
+ if (task) {
+ task->t.flags = TF_EXIT;
+ uvesafb_exec(task);
+ uvesafb_free(task);
+ }
+ }
+
+ cn_del_callback(&uvesafb_cn_id);
+ driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
+ platform_device_unregister(uvesafb_device);
+ platform_driver_unregister(&uvesafb_driver);
+}
+
+module_exit(uvesafb_exit);
+
+static inline int param_get_scroll(char *buffer, struct kernel_param *kp)
+{
+ return 0;
+}
+
+static inline int param_set_scroll(const char *val, struct kernel_param *kp)
+{
+ ypan = 0;
+
+ if (!strcmp(val, "redraw"))
+ ypan = 0;
+ else if (!strcmp(val, "ypan"))
+ ypan = 1;
+ else if (!strcmp(val, "ywrap"))
+ ypan = 2;
+
+ return 0;
+}
+
+#define param_check_scroll(name, p) __param_check(name, p, void);
+
+module_param_named(scroll, ypan, scroll, 0);
+MODULE_PARM_DESC(scroll,
+ "Scrolling mode, set to 'redraw', ''ypan' or 'ywrap'");
+module_param_named(vgapal, pmi_setpal, invbool, 0);
+MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
+module_param_named(pmipal, pmi_setpal, bool, 0);
+MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
+module_param(mtrr, uint, 0);
+MODULE_PARM_DESC(mtrr,
+ "Memory Type Range Registers setting. Use 0 to disable.");
+module_param(blank, bool, 0);
+MODULE_PARM_DESC(blank, "Enable hardware blanking");
+module_param(nocrtc, bool, 0);
+MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
+module_param(noedid, bool, 0);
+MODULE_PARM_DESC(noedid,
+ "Ignore EDID-provided monitor limits when setting modes");
+module_param(vram_remap, uint, 0);
+MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
+module_param(vram_total, uint, 0);
+MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
+module_param(maxclk, ushort, 0);
+MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
+module_param(maxhf, ushort, 0);
+MODULE_PARM_DESC(maxhf,
+ "Maximum horizontal frequency [kHz], overrides EDID data");
+module_param(maxvf, ushort, 0);
+MODULE_PARM_DESC(maxvf,
+ "Maximum vertical frequency [Hz], overrides EDID data");
+module_param_named(mode, mode_option, charp, 0);
+MODULE_PARM_DESC(mode,
+ "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
+module_param(vbemode, ushort, 0);
+MODULE_PARM_DESC(vbemode,
+ "VBE mode number to set, overrides the 'mode' option");
+module_param_string(v86d, v86d_path, PATH_MAX, 0660);
+MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michal Januszewski <spock@...too.org>");
+MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
+
diff --git a/include/video/Kbuild b/include/video/Kbuild
index a14f9c0..53a6c73 100644
--- a/include/video/Kbuild
+++ b/include/video/Kbuild
@@ -1 +1 @@
-unifdef-y += sisfb.h
+unifdef-y += sisfb.h uvesafb.h
diff --git a/include/video/uvesafb.h b/include/video/uvesafb.h
new file mode 100644
index 0000000..95bcef1
--- /dev/null
+++ b/include/video/uvesafb.h
@@ -0,0 +1,193 @@
+#ifndef _UVESAFB_H
+#define _UVESAFB_H
+
+struct v86_regs {
+ __u32 ebx;
+ __u32 ecx;
+ __u32 edx;
+ __u32 esi;
+ __u32 edi;
+ __u32 ebp;
+ __u32 eax;
+ __u32 eip;
+ __u32 eflags;
+ __u32 esp;
+ __u16 cs;
+ __u16 ss;
+ __u16 es;
+ __u16 ds;
+ __u16 fs;
+ __u16 gs;
+};
+
+/* Task flags */
+#define TF_VBEIB 0x01
+#define TF_BUF_ESDI 0x02
+#define TF_BUF_ESBX 0x04
+#define TF_BUF_RET 0x08
+#define TF_EXIT 0x10
+
+struct uvesafb_task {
+ __u8 flags;
+ int buf_len;
+ struct v86_regs regs;
+};
+
+/* Constants for the capabilities field
+ * in vbe_ib */
+#define VBE_CAP_CAN_SWITCH_DAC 0x01
+#define VBE_CAP_VGACOMPAT 0x02
+
+/* The VBE Info Block */
+struct vbe_ib {
+ char vbe_signature[4];
+ __u16 vbe_version;
+ __u32 oem_string_ptr;
+ __u32 capabilities;
+ __u32 mode_list_ptr;
+ __u16 total_memory;
+ __u16 oem_software_rev;
+ __u32 oem_vendor_name_ptr;
+ __u32 oem_product_name_ptr;
+ __u32 oem_product_rev_ptr;
+ __u8 reserved[222];
+ char oem_data[256];
+ char misc_data[512];
+} __attribute__ ((packed));
+
+#ifdef __KERNEL__
+
+/* VBE CRTC Info Block */
+struct vbe_crtc_ib {
+ u16 horiz_total;
+ u16 horiz_start;
+ u16 horiz_end;
+ u16 vert_total;
+ u16 vert_start;
+ u16 vert_end;
+ u8 flags;
+ u32 pixel_clock;
+ u16 refresh_rate;
+ u8 reserved[40];
+} __attribute__ ((packed));
+
+#define VBE_MODE_VGACOMPAT 0x20
+#define VBE_MODE_COLOR 0x08
+#define VBE_MODE_SUPPORTEDHW 0x01
+#define VBE_MODE_GRAPHICS 0x10
+#define VBE_MODE_LFB 0x80
+
+#define VBE_MODE_MASK (VBE_MODE_COLOR | VBE_MODE_SUPPORTEDHW | \
+ VBE_MODE_GRAPHICS | VBE_MODE_LFB)
+
+/* VBE Mode Info Block */
+struct vbe_mode_ib {
+ /* for all VBE revisions */
+ u16 mode_attr;
+ u8 winA_attr;
+ u8 winB_attr;
+ u16 win_granularity;
+ u16 win_size;
+ u16 winA_seg;
+ u16 winB_seg;
+ u32 win_func_ptr;
+ u16 bytes_per_scan_line;
+
+ /* for VBE 1.2+ */
+ u16 x_res;
+ u16 y_res;
+ u8 x_char_size;
+ u8 y_char_size;
+ u8 planes;
+ u8 bits_per_pixel;
+ u8 banks;
+ u8 memory_model;
+ u8 bank_size;
+ u8 image_pages;
+ u8 reserved1;
+
+ /* Direct color fields for direct/6 and YUV/7 memory models. */
+ /* Offsets are bit positions of lsb in the mask. */
+ u8 red_len;
+ u8 red_off;
+ u8 green_len;
+ u8 green_off;
+ u8 blue_len;
+ u8 blue_off;
+ u8 rsvd_len;
+ u8 rsvd_off;
+ u8 direct_color_info; /* direct color mode attributes */
+
+ /* for VBE 2.0+ */
+ u32 phys_base_ptr;
+ u8 reserved2[6];
+
+ /* for VBE 3.0+ */
+ u16 lin_bytes_per_scan_line;
+ u8 bnk_image_pages;
+ u8 lin_image_pages;
+ u8 lin_red_len;
+ u8 lin_red_off;
+ u8 lin_green_len;
+ u8 lin_green_off;
+ u8 lin_blue_len;
+ u8 lin_blue_off;
+ u8 lin_rsvd_len;
+ u8 lin_rsvd_off;
+ u32 max_pixel_clock;
+ u16 mode_id;
+ u8 depth;
+} __attribute__ ((packed));
+
+#define UVESAFB_DEFAULT_MODE "640x480-16"
+
+/* How long to wait for a reply from userspace [ms] */
+#define UVESAFB_TIMEOUT 5000
+
+/* Max number of concurrent tasks */
+#define UVESAFB_TASKS_MAX 16
+
+#define dac_reg (0x3c8)
+#define dac_val (0x3c9)
+
+struct uvesafb_pal_entry {
+ u_char blue, green, red, pad;
+} __attribute__ ((packed));
+
+struct uvesafb_ktask {
+ struct uvesafb_task t;
+ void *buf;
+ struct completion *done;
+ u32 ack;
+};
+
+static int uvesafb_exec(struct uvesafb_ktask *tsk);
+
+#define UVESAFB_EXACT_RES 1
+#define UVESAFB_EXACT_DEPTH 2
+
+struct uvesafb_par {
+ struct vbe_ib vbe_ib; /* VBE Info Block */
+ struct vbe_mode_ib *vbe_modes; /* list of supported VBE modes */
+ int vbe_modes_cnt;
+
+ u8 nocrtc;
+ u8 ypan; /* 0 - nothing, 1 - ypan, 2 - ywrap */
+ u8 pmi_setpal; /* PMI for palette changes */
+ u16 *pmi_base; /* protected mode interface location */
+ void *pmi_start;
+ void *pmi_pal;
+ u8 *vbe_state_orig; /*
+ * original hardware state, before the
+ * driver was loaded
+ */
+ u8 *vbe_state_saved; /* state saved by fb_save_state */
+ int vbe_state_size;
+ atomic_t ref_count;
+
+ int mode_idx;
+ struct vbe_crtc_ib crtc;
+};
+
+#endif /* __KERNEL__ */
+#endif /* _UVESAFB_H */
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists