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2006 lines
49 KiB
2006 lines
49 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* A framebuffer driver for VBE 2.0+ compliant video cards |
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* |
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* (c) 2007 Michal Januszewski <[email protected]> |
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* Loosely based upon the vesafb driver. |
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* |
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*/ |
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|
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/skbuff.h> |
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#include <linux/timer.h> |
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#include <linux/completion.h> |
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#include <linux/connector.h> |
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#include <linux/random.h> |
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#include <linux/platform_device.h> |
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#include <linux/limits.h> |
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#include <linux/fb.h> |
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#include <linux/io.h> |
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#include <linux/mutex.h> |
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#include <linux/slab.h> |
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#include <video/edid.h> |
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#include <video/uvesafb.h> |
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#ifdef CONFIG_X86 |
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#include <video/vga.h> |
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#endif |
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#include "edid.h" |
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static struct cb_id uvesafb_cn_id = { |
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.idx = CN_IDX_V86D, |
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.val = CN_VAL_V86D_UVESAFB |
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}; |
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static char v86d_path[PATH_MAX] = "/sbin/v86d"; |
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static char v86d_started; /* has v86d been started by uvesafb? */ |
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static const struct fb_fix_screeninfo uvesafb_fix = { |
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.id = "VESA VGA", |
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.type = FB_TYPE_PACKED_PIXELS, |
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.accel = FB_ACCEL_NONE, |
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.visual = FB_VISUAL_TRUECOLOR, |
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}; |
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static int mtrr = 3; /* enable mtrr by default */ |
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static bool blank = true; /* enable blanking by default */ |
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static int ypan = 1; /* 0: scroll, 1: ypan, 2: ywrap */ |
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static bool pmi_setpal = true; /* use PMI for palette changes */ |
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static bool nocrtc; /* ignore CRTC settings */ |
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static bool noedid; /* don't try DDC transfers */ |
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static int vram_remap; /* set amt. of memory to be used */ |
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static int vram_total; /* set total amount of memory */ |
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static u16 maxclk; /* maximum pixel clock */ |
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static u16 maxvf; /* maximum vertical frequency */ |
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static u16 maxhf; /* maximum horizontal frequency */ |
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static u16 vbemode; /* force use of a specific VBE mode */ |
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static char *mode_option; |
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static u8 dac_width = 6; |
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static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX]; |
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static DEFINE_MUTEX(uvfb_lock); |
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/* |
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* A handler for replies from userspace. |
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* |
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* Make sure each message passes consistency checks and if it does, |
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* find the kernel part of the task struct, copy the registers and |
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* the buffer contents and then complete the task. |
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*/ |
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static void uvesafb_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) |
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{ |
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struct uvesafb_task *utask; |
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struct uvesafb_ktask *task; |
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if (!capable(CAP_SYS_ADMIN)) |
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return; |
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if (msg->seq >= UVESAFB_TASKS_MAX) |
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return; |
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mutex_lock(&uvfb_lock); |
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task = uvfb_tasks[msg->seq]; |
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if (!task || msg->ack != task->ack) { |
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mutex_unlock(&uvfb_lock); |
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return; |
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} |
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utask = (struct uvesafb_task *)msg->data; |
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/* Sanity checks for the buffer length. */ |
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if (task->t.buf_len < utask->buf_len || |
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utask->buf_len > msg->len - sizeof(*utask)) { |
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mutex_unlock(&uvfb_lock); |
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return; |
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} |
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uvfb_tasks[msg->seq] = NULL; |
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mutex_unlock(&uvfb_lock); |
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memcpy(&task->t, utask, sizeof(*utask)); |
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if (task->t.buf_len && task->buf) |
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memcpy(task->buf, utask + 1, task->t.buf_len); |
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complete(task->done); |
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return; |
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} |
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static int uvesafb_helper_start(void) |
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{ |
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char *envp[] = { |
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"HOME=/", |
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"PATH=/sbin:/bin", |
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NULL, |
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}; |
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char *argv[] = { |
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v86d_path, |
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NULL, |
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}; |
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return call_usermodehelper(v86d_path, argv, envp, UMH_WAIT_PROC); |
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} |
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/* |
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* Execute a uvesafb task. |
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* |
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* Returns 0 if the task is executed successfully. |
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* |
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* A message sent to the userspace consists of the uvesafb_task |
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* struct and (optionally) a buffer. The uvesafb_task struct is |
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* a simplified version of uvesafb_ktask (its kernel counterpart) |
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* containing only the register values, flags and the length of |
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* the buffer. |
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* |
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* Each message is assigned a sequence number (increased linearly) |
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* and a random ack number. The sequence number is used as a key |
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* for the uvfb_tasks array which holds pointers to uvesafb_ktask |
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* structs for all requests. |
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*/ |
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static int uvesafb_exec(struct uvesafb_ktask *task) |
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{ |
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static int seq; |
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struct cn_msg *m; |
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int err; |
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int len = sizeof(task->t) + task->t.buf_len; |
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/* |
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* Check whether the message isn't longer than the maximum |
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* allowed by connector. |
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*/ |
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if (sizeof(*m) + len > CONNECTOR_MAX_MSG_SIZE) { |
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pr_warn("message too long (%d), can't execute task\n", |
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(int)(sizeof(*m) + len)); |
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return -E2BIG; |
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} |
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m = kzalloc(sizeof(*m) + len, GFP_KERNEL); |
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if (!m) |
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return -ENOMEM; |
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init_completion(task->done); |
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memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id)); |
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m->seq = seq; |
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m->len = len; |
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m->ack = prandom_u32(); |
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/* uvesafb_task structure */ |
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memcpy(m + 1, &task->t, sizeof(task->t)); |
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/* Buffer */ |
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memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len); |
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/* |
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* Save the message ack number so that we can find the kernel |
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* part of this task when a reply is received from userspace. |
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*/ |
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task->ack = m->ack; |
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mutex_lock(&uvfb_lock); |
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/* If all slots are taken -- bail out. */ |
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if (uvfb_tasks[seq]) { |
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mutex_unlock(&uvfb_lock); |
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err = -EBUSY; |
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goto out; |
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} |
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/* Save a pointer to the kernel part of the task struct. */ |
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uvfb_tasks[seq] = task; |
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mutex_unlock(&uvfb_lock); |
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err = cn_netlink_send(m, 0, 0, GFP_KERNEL); |
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if (err == -ESRCH) { |
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/* |
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* Try to start the userspace helper if sending |
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* the request failed the first time. |
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*/ |
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err = uvesafb_helper_start(); |
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if (err) { |
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pr_err("failed to execute %s\n", v86d_path); |
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pr_err("make sure that the v86d helper is installed and executable\n"); |
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} else { |
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v86d_started = 1; |
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err = cn_netlink_send(m, 0, 0, gfp_any()); |
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if (err == -ENOBUFS) |
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err = 0; |
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} |
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} else if (err == -ENOBUFS) |
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err = 0; |
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if (!err && !(task->t.flags & TF_EXIT)) |
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err = !wait_for_completion_timeout(task->done, |
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msecs_to_jiffies(UVESAFB_TIMEOUT)); |
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mutex_lock(&uvfb_lock); |
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uvfb_tasks[seq] = NULL; |
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mutex_unlock(&uvfb_lock); |
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seq++; |
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if (seq >= UVESAFB_TASKS_MAX) |
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seq = 0; |
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out: |
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kfree(m); |
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return err; |
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} |
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/* |
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* Free a uvesafb_ktask struct. |
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*/ |
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static void uvesafb_free(struct uvesafb_ktask *task) |
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{ |
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if (task) { |
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kfree(task->done); |
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kfree(task); |
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} |
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} |
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/* |
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* Prepare a uvesafb_ktask struct to be used again. |
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*/ |
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static void uvesafb_reset(struct uvesafb_ktask *task) |
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{ |
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struct completion *cpl = task->done; |
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memset(task, 0, sizeof(*task)); |
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task->done = cpl; |
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} |
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/* |
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* Allocate and prepare a uvesafb_ktask struct. |
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*/ |
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static struct uvesafb_ktask *uvesafb_prep(void) |
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{ |
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struct uvesafb_ktask *task; |
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task = kzalloc(sizeof(*task), GFP_KERNEL); |
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if (task) { |
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task->done = kzalloc(sizeof(*task->done), GFP_KERNEL); |
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if (!task->done) { |
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kfree(task); |
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task = NULL; |
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} |
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} |
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return task; |
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} |
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static void uvesafb_setup_var(struct fb_var_screeninfo *var, |
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struct fb_info *info, struct vbe_mode_ib *mode) |
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{ |
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struct uvesafb_par *par = info->par; |
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var->vmode = FB_VMODE_NONINTERLACED; |
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var->sync = FB_SYNC_VERT_HIGH_ACT; |
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var->xres = mode->x_res; |
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var->yres = mode->y_res; |
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var->xres_virtual = mode->x_res; |
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var->yres_virtual = (par->ypan) ? |
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info->fix.smem_len / mode->bytes_per_scan_line : |
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mode->y_res; |
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var->xoffset = 0; |
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var->yoffset = 0; |
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var->bits_per_pixel = mode->bits_per_pixel; |
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if (var->bits_per_pixel == 15) |
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var->bits_per_pixel = 16; |
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if (var->bits_per_pixel > 8) { |
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var->red.offset = mode->red_off; |
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var->red.length = mode->red_len; |
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var->green.offset = mode->green_off; |
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var->green.length = mode->green_len; |
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var->blue.offset = mode->blue_off; |
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var->blue.length = mode->blue_len; |
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var->transp.offset = mode->rsvd_off; |
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var->transp.length = mode->rsvd_len; |
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} else { |
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var->red.offset = 0; |
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var->green.offset = 0; |
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var->blue.offset = 0; |
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var->transp.offset = 0; |
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var->red.length = 8; |
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var->green.length = 8; |
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var->blue.length = 8; |
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var->transp.length = 0; |
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} |
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} |
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static int uvesafb_vbe_find_mode(struct uvesafb_par *par, |
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int xres, int yres, int depth, unsigned char flags) |
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{ |
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int i, match = -1, h = 0, d = 0x7fffffff; |
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for (i = 0; i < par->vbe_modes_cnt; i++) { |
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h = abs(par->vbe_modes[i].x_res - xres) + |
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abs(par->vbe_modes[i].y_res - yres) + |
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abs(depth - par->vbe_modes[i].depth); |
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/* |
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* We have an exact match in terms of resolution |
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* and depth. |
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*/ |
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if (h == 0) |
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return i; |
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if (h < d || (h == d && par->vbe_modes[i].depth > depth)) { |
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d = h; |
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match = i; |
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} |
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} |
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i = 1; |
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if (flags & UVESAFB_EXACT_DEPTH && |
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par->vbe_modes[match].depth != depth) |
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i = 0; |
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if (flags & UVESAFB_EXACT_RES && d > 24) |
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i = 0; |
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if (i != 0) |
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return match; |
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else |
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return -1; |
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} |
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static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par) |
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{ |
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struct uvesafb_ktask *task; |
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u8 *state; |
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int err; |
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if (!par->vbe_state_size) |
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return NULL; |
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state = kmalloc(par->vbe_state_size, GFP_KERNEL); |
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if (!state) |
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return ERR_PTR(-ENOMEM); |
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task = uvesafb_prep(); |
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if (!task) { |
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kfree(state); |
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return NULL; |
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} |
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task->t.regs.eax = 0x4f04; |
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task->t.regs.ecx = 0x000f; |
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task->t.regs.edx = 0x0001; |
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task->t.flags = TF_BUF_RET | TF_BUF_ESBX; |
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task->t.buf_len = par->vbe_state_size; |
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task->buf = state; |
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err = uvesafb_exec(task); |
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if (err || (task->t.regs.eax & 0xffff) != 0x004f) { |
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pr_warn("VBE get state call failed (eax=0x%x, err=%d)\n", |
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task->t.regs.eax, err); |
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kfree(state); |
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state = NULL; |
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} |
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uvesafb_free(task); |
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return state; |
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} |
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static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf) |
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{ |
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struct uvesafb_ktask *task; |
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int err; |
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if (!state_buf) |
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return; |
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task = uvesafb_prep(); |
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if (!task) |
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return; |
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task->t.regs.eax = 0x4f04; |
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task->t.regs.ecx = 0x000f; |
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task->t.regs.edx = 0x0002; |
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task->t.buf_len = par->vbe_state_size; |
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task->t.flags = TF_BUF_ESBX; |
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task->buf = state_buf; |
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err = uvesafb_exec(task); |
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if (err || (task->t.regs.eax & 0xffff) != 0x004f) |
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pr_warn("VBE state restore call failed (eax=0x%x, err=%d)\n", |
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task->t.regs.eax, err); |
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uvesafb_free(task); |
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} |
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static int uvesafb_vbe_getinfo(struct uvesafb_ktask *task, |
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struct uvesafb_par *par) |
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{ |
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int err; |
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task->t.regs.eax = 0x4f00; |
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task->t.flags = TF_VBEIB; |
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task->t.buf_len = sizeof(struct vbe_ib); |
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task->buf = &par->vbe_ib; |
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memcpy(par->vbe_ib.vbe_signature, "VBE2", 4); |
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err = uvesafb_exec(task); |
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if (err || (task->t.regs.eax & 0xffff) != 0x004f) { |
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pr_err("Getting VBE info block failed (eax=0x%x, err=%d)\n", |
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(u32)task->t.regs.eax, err); |
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return -EINVAL; |
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} |
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if (par->vbe_ib.vbe_version < 0x0200) { |
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pr_err("Sorry, pre-VBE 2.0 cards are not supported\n"); |
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return -EINVAL; |
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} |
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if (!par->vbe_ib.mode_list_ptr) { |
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pr_err("Missing mode list!\n"); |
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return -EINVAL; |
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} |
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pr_info(""); |
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/* |
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* Convert string pointers and the mode list pointer into |
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* usable addresses. Print informational messages about the |
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* video adapter and its vendor. |
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*/ |
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if (par->vbe_ib.oem_vendor_name_ptr) |
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pr_cont("%s, ", |
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((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr); |
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if (par->vbe_ib.oem_product_name_ptr) |
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pr_cont("%s, ", |
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((char *)task->buf) + par->vbe_ib.oem_product_name_ptr); |
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if (par->vbe_ib.oem_product_rev_ptr) |
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pr_cont("%s, ", |
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((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr); |
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if (par->vbe_ib.oem_string_ptr) |
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pr_cont("OEM: %s, ", |
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((char *)task->buf) + par->vbe_ib.oem_string_ptr); |
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pr_cont("VBE v%d.%d\n", |
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(par->vbe_ib.vbe_version & 0xff00) >> 8, |
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par->vbe_ib.vbe_version & 0xff); |
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return 0; |
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} |
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static int uvesafb_vbe_getmodes(struct uvesafb_ktask *task, |
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struct uvesafb_par *par) |
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{ |
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int off = 0, err; |
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u16 *mode; |
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par->vbe_modes_cnt = 0; |
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/* Count available modes. */ |
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mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr); |
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while (*mode != 0xffff) { |
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par->vbe_modes_cnt++; |
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mode++; |
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} |
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par->vbe_modes = kcalloc(par->vbe_modes_cnt, |
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sizeof(struct vbe_mode_ib), |
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GFP_KERNEL); |
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if (!par->vbe_modes) |
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return -ENOMEM; |
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/* Get info about all available modes. */ |
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mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr); |
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while (*mode != 0xffff) { |
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struct vbe_mode_ib *mib; |
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uvesafb_reset(task); |
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task->t.regs.eax = 0x4f01; |
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task->t.regs.ecx = (u32) *mode; |
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task->t.flags = TF_BUF_RET | TF_BUF_ESDI; |
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task->t.buf_len = sizeof(struct vbe_mode_ib); |
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task->buf = par->vbe_modes + off; |
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err = uvesafb_exec(task); |
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if (err || (task->t.regs.eax & 0xffff) != 0x004f) { |
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pr_warn("Getting mode info block for mode 0x%x failed (eax=0x%x, err=%d)\n", |
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*mode, (u32)task->t.regs.eax, err); |
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mode++; |
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par->vbe_modes_cnt--; |
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continue; |
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} |
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mib = task->buf; |
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mib->mode_id = *mode; |
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|
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/* |
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* We only want modes that are supported with the current |
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* hardware configuration, color, graphics and that have |
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* support for the LFB. |
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*/ |
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if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK && |
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mib->bits_per_pixel >= 8) |
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off++; |
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else |
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par->vbe_modes_cnt--; |
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mode++; |
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mib->depth = mib->red_len + mib->green_len + mib->blue_len; |
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|
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/* |
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* Handle 8bpp modes and modes with broken color component |
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* lengths. |
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*/ |
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if (mib->depth == 0 || (mib->depth == 24 && |
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mib->bits_per_pixel == 32)) |
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mib->depth = mib->bits_per_pixel; |
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} |
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if (par->vbe_modes_cnt > 0) |
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return 0; |
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else |
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return -EINVAL; |
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} |
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|
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/* |
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* The Protected Mode Interface is 32-bit x86 code, so we only run it on |
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* x86 and not x86_64. |
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*/ |
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#ifdef CONFIG_X86_32 |
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static int uvesafb_vbe_getpmi(struct uvesafb_ktask *task, |
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struct uvesafb_par *par) |
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{ |
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int i, err; |
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|
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uvesafb_reset(task); |
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task->t.regs.eax = 0x4f0a; |
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task->t.regs.ebx = 0x0; |
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err = uvesafb_exec(task); |
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if (err) |
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return err; |
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|
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if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) { |
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par->pmi_setpal = par->ypan = 0; |
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} else { |
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par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4) |
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+ task->t.regs.edi); |
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par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1]; |
|
par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2]; |
|
pr_info("protected mode interface info at %04x:%04x\n", |
|
(u16)task->t.regs.es, (u16)task->t.regs.edi); |
|
pr_info("pmi: set display start = %p, set palette = %p\n", |
|
par->pmi_start, par->pmi_pal); |
|
|
|
if (par->pmi_base[3]) { |
|
pr_info("pmi: ports ="); |
|
for (i = par->pmi_base[3]/2; |
|
par->pmi_base[i] != 0xffff; i++) |
|
pr_cont(" %x", par->pmi_base[i]); |
|
pr_cont("\n"); |
|
|
|
if (par->pmi_base[i] != 0xffff) { |
|
pr_info("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 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 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) { |
|
pr_info("VBIOS/hardware supports both DDC1 and DDC2 transfers\n"); |
|
} else if ((task->t.regs.ebx & 0x3) == 2) { |
|
pr_info("VBIOS/hardware supports DDC2 transfers\n"); |
|
} else if ((task->t.regs.ebx & 0x3) == 1) { |
|
pr_info("VBIOS/hardware supports DDC1 transfers\n"); |
|
} else { |
|
pr_info("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); |
|
if (!task->buf) |
|
return -ENOMEM; |
|
|
|
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 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) |
|
pr_info("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 |
|
pr_info("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 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) { |
|
pr_warn("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 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) { |
|
if (__supported_pte_mask & _PAGE_NX) { |
|
par->pmi_setpal = par->ypan = 0; |
|
pr_warn("NX protection is active, better not use the PMI\n"); |
|
} else { |
|
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 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) { |
|
modeid = i; |
|
uvesafb_setup_var(&info->var, info, |
|
&par->vbe_modes[modeid]); |
|
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; |
|
goto gotmode; |
|
} |
|
} |
|
pr_info("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 = kcalloc(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) { |
|
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; |
|
uvesafb_setup_var(&info->var, info, |
|
&par->vbe_modes[modeid]); |
|
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; |
|
|
|
uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]); |
|
|
|
gotmode: |
|
/* |
|
* 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; |
|
#ifdef CONFIG_X86 |
|
struct uvesafb_par *par = info->par; |
|
int i = par->mode_idx; |
|
#endif |
|
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 - dac_width; |
|
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 - dac_width; |
|
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_array(cmap->len, sizeof(*entries), |
|
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_ktask *task; |
|
int err = 1; |
|
#ifdef CONFIG_X86 |
|
struct uvesafb_par *par = info->par; |
|
|
|
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 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); |
|
u8 *buf = NULL; |
|
|
|
if (!cnt && par->vbe_state_size) { |
|
buf = uvesafb_vbe_state_save(par); |
|
if (IS_ERR(buf)) { |
|
pr_warn("save hardware state failed, error code is %ld!\n", |
|
PTR_ERR(buf)); |
|
} else { |
|
par->vbe_state_orig = buf; |
|
} |
|
} |
|
|
|
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); |
|
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; |
|
setmode: |
|
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) { |
|
/* |
|
* The mode switch might have failed because we tried to |
|
* use our own timings. Try again with the default timings. |
|
*/ |
|
if (crtc != NULL) { |
|
pr_warn("mode switch failed (eax=0x%x, err=%d) - trying again with default timings\n", |
|
task->t.regs.eax, err); |
|
uvesafb_reset(task); |
|
kfree(crtc); |
|
crtc = NULL; |
|
info->var.pixclock = 0; |
|
goto setmode; |
|
} else { |
|
pr_err("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) { |
|
dac_width = 6; |
|
} else { |
|
dac_width = 8; |
|
} |
|
} |
|
|
|
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: |
|
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 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, |
|
}; |
|
|
|
static void 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; |
|
|
|
/* Disable blanking if the user requested so. */ |
|
if (!blank) |
|
uvesafb_ops.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. |
|
*/ |
|
size_vmode = info->var.yres * mode->bytes_per_scan_line; |
|
|
|
/* |
|
* 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) { |
|
pr_info("scrolling: %s using protected mode interface, yres_virtual=%d\n", |
|
(par->ypan > 1) ? "ywrap" : "ypan", |
|
info->var.yres_virtual); |
|
} else { |
|
pr_info("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) |
|
uvesafb_ops.fb_pan_display = NULL; |
|
} |
|
|
|
static void uvesafb_init_mtrr(struct fb_info *info) |
|
{ |
|
struct uvesafb_par *par = info->par; |
|
|
|
if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) { |
|
int temp_size = info->fix.smem_len; |
|
|
|
int rc; |
|
|
|
/* Find the largest power-of-two */ |
|
temp_size = roundup_pow_of_two(temp_size); |
|
|
|
/* Try and find a power of two to add */ |
|
do { |
|
rc = arch_phys_wc_add(info->fix.smem_start, temp_size); |
|
temp_size >>= 1; |
|
} while (temp_size >= PAGE_SIZE && rc == -EINVAL); |
|
|
|
if (rc >= 0) |
|
par->mtrr_handle = rc; |
|
} |
|
} |
|
|
|
static void uvesafb_ioremap(struct fb_info *info) |
|
{ |
|
info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len); |
|
} |
|
|
|
static ssize_t uvesafb_show_vbe_ver(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct fb_info *info = dev_get_drvdata(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 = dev_get_drvdata(dev); |
|
struct uvesafb_par *par = info->par; |
|
int ret = 0, i; |
|
|
|
for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) { |
|
ret += scnprintf(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 = dev_get_drvdata(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 = dev_get_drvdata(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 = dev_get_drvdata(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 = dev_get_drvdata(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 = dev_get_drvdata(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 = dev_get_drvdata(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 const struct attribute_group uvesafb_dev_attgrp = { |
|
.name = NULL, |
|
.attrs = uvesafb_dev_attrs, |
|
}; |
|
|
|
static int 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) { |
|
pr_err("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_region(0x3c0, 32, "uvesafb")) { |
|
pr_err("request region 0x3c0-0x3e0 failed\n"); |
|
err = -EIO; |
|
goto out_mode; |
|
} |
|
|
|
if (!request_mem_region(info->fix.smem_start, info->fix.smem_len, |
|
"uvesafb")) { |
|
pr_err("cannot reserve video memory at 0x%lx\n", |
|
info->fix.smem_start); |
|
err = -EIO; |
|
goto out_reg; |
|
} |
|
|
|
uvesafb_init_mtrr(info); |
|
uvesafb_ioremap(info); |
|
|
|
if (!info->screen_base) { |
|
pr_err("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; |
|
} |
|
|
|
platform_set_drvdata(dev, info); |
|
|
|
if (register_framebuffer(info) < 0) { |
|
pr_err("failed to register framebuffer device\n"); |
|
err = -EINVAL; |
|
goto out_unmap; |
|
} |
|
|
|
pr_info("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); |
|
fb_info(info, "%s frame buffer device\n", info->fix.id); |
|
|
|
err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp); |
|
if (err != 0) |
|
fb_warn(info, "failed to register attributes\n"); |
|
|
|
return 0; |
|
|
|
out_unmap: |
|
iounmap(info->screen_base); |
|
out_mem: |
|
release_mem_region(info->fix.smem_start, info->fix.smem_len); |
|
out_reg: |
|
release_region(0x3c0, 32); |
|
out_mode: |
|
if (!list_empty(&info->modelist)) |
|
fb_destroy_modelist(&info->modelist); |
|
fb_destroy_modedb(info->monspecs.modedb); |
|
fb_dealloc_cmap(&info->cmap); |
|
out: |
|
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); |
|
arch_phys_wc_del(par->mtrr_handle); |
|
release_mem_region(info->fix.smem_start, info->fix.smem_len); |
|
fb_destroy_modedb(info->monspecs.modedb); |
|
fb_dealloc_cmap(&info->cmap); |
|
|
|
kfree(par->vbe_modes); |
|
kfree(par->vbe_state_orig); |
|
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 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 = false; |
|
else if (!strcmp(this_opt, "pmipal")) |
|
pmi_setpal = true; |
|
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 = true; |
|
else if (!strcmp(this_opt, "noedid")) |
|
noedid = true; |
|
else if (!strcmp(this_opt, "noblank")) |
|
blank = false; |
|
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 { |
|
pr_warn("unrecognized option %s\n", this_opt); |
|
} |
|
} |
|
|
|
if (mtrr != 3 && mtrr != 0) |
|
pr_warn("uvesafb: mtrr should be set to 0 or 3; %d is unsupported", mtrr); |
|
|
|
return 0; |
|
} |
|
#endif /* !MODULE */ |
|
|
|
static ssize_t v86d_show(struct device_driver *dev, char *buf) |
|
{ |
|
return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path); |
|
} |
|
|
|
static ssize_t v86d_store(struct device_driver *dev, const char *buf, |
|
size_t count) |
|
{ |
|
strncpy(v86d_path, buf, PATH_MAX - 1); |
|
return count; |
|
} |
|
static DRIVER_ATTR_RW(v86d); |
|
|
|
static int 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) { |
|
pr_warn("failed to register attributes\n"); |
|
err = 0; |
|
} |
|
} |
|
return err; |
|
} |
|
|
|
module_init(uvesafb_init); |
|
|
|
static void 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 int param_set_scroll(const char *val, const 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; |
|
else |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
static const struct kernel_param_ops param_ops_scroll = { |
|
.set = param_set_scroll, |
|
}; |
|
#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 memory [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(mode_option, charp, 0); |
|
MODULE_PARM_DESC(mode_option, |
|
"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 <[email protected]>"); |
|
MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards"); |
|
|
|
|