fb29900217
Required for vmalloc_32 and vfree declarations on non-x86 platforms. Signed-off-by: Amit Kucheria <amit.kucheria@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
939 lines
21 KiB
C
939 lines
21 KiB
C
/*****************************************************************************
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* DLFB Kernel Driver *
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* Version 0.2 (udlfb) *
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* (C) 2009 Roberto De Ioris <roberto@unbit.it> *
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* *
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* This file is licensed under the GPLv2. See COPYING in the package. *
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* Based on the amazing work of Florian Echtler and libdlo 0.1 *
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* *
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* *
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* 10.06.09 release 0.2.3 (edid ioctl, fallback for unsupported modes) *
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* 05.06.09 release 0.2.2 (real screen blanking, rle compression, double buffer) *
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* 31.05.09 release 0.2 *
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* 22.05.09 First public (ugly) release *
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*****************************************************************************/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/usb.h>
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#include <linux/uaccess.h>
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#include <linux/mm.h>
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#include <linux/fb.h>
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#include <linux/mutex.h>
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#include <linux/vmalloc.h>
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#include "udlfb.h"
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#define DRIVER_VERSION "DLFB 0.2"
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/* memory functions taken from vfb */
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static void *rvmalloc(unsigned long size)
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{
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void *mem;
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unsigned long adr;
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size = PAGE_ALIGN(size);
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mem = vmalloc_32(size);
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if (!mem)
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return NULL;
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memset(mem, 0, size); /* Clear the ram out, no junk to the user */
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adr = (unsigned long)mem;
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while (size > 0) {
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SetPageReserved(vmalloc_to_page((void *)adr));
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adr += PAGE_SIZE;
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size -= PAGE_SIZE;
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}
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return mem;
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}
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static void rvfree(void *mem, unsigned long size)
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{
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unsigned long adr;
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if (!mem)
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return;
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adr = (unsigned long)mem;
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while ((long)size > 0) {
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ClearPageReserved(vmalloc_to_page((void *)adr));
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adr += PAGE_SIZE;
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size -= PAGE_SIZE;
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}
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vfree(mem);
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}
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static int dlfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
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{
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unsigned long start = vma->vm_start;
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unsigned long size = vma->vm_end - vma->vm_start;
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unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
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unsigned long page, pos;
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printk("MMAP: %lu %u\n", offset + size, info->fix.smem_len);
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if (offset + size > info->fix.smem_len)
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return -EINVAL;
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pos = (unsigned long)info->fix.smem_start + offset;
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while (size > 0) {
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page = vmalloc_to_pfn((void *)pos);
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if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
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return -EAGAIN;
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start += PAGE_SIZE;
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pos += PAGE_SIZE;
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if (size > PAGE_SIZE)
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size -= PAGE_SIZE;
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else
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size = 0;
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}
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vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
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return 0;
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}
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/* ioctl structure */
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struct dloarea {
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int x, y;
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int w, h;
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int x2, y2;
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};
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/*
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static struct usb_device_id id_table [] = {
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{ USB_DEVICE(0x17e9, 0x023d) },
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{ }
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};
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*/
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static struct usb_device_id id_table[] = {
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{.idVendor = 0x17e9, .match_flags = USB_DEVICE_ID_MATCH_VENDOR,},
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{},
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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static struct usb_driver dlfb_driver;
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// thanks to Henrik Bjerregaard Pedersen for this function
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static char *rle_compress16(uint16_t * src, char *dst, int rem)
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{
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int rl;
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uint16_t pix0;
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char *end_if_raw = dst + 6 + 2 * rem;
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dst += 6; // header will be filled in if RLE is worth it
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while (rem && dst < end_if_raw) {
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char *start = (char *)src;
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pix0 = *src++;
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rl = 1;
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rem--;
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while (rem && *src == pix0)
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rem--, rl++, src++;
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*dst++ = rl;
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*dst++ = start[1];
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*dst++ = start[0];
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}
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return dst;
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}
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/*
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Thanks to Henrik Bjerregaard Pedersen for rle implementation and code refactoring.
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Next step is huffman compression.
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*/
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static int
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image_blit(struct dlfb_data *dev_info, int x, int y, int width, int height,
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char *data)
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{
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int i, j, base;
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int rem = width;
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int ret;
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int firstdiff, thistime;
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char *bufptr;
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if (x + width > dev_info->info->var.xres)
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return -EINVAL;
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if (y + height > dev_info->info->var.yres)
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return -EINVAL;
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mutex_lock(&dev_info->bulk_mutex);
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base =
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dev_info->base16 + ((dev_info->info->var.xres * 2 * y) + (x * 2));
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data += (dev_info->info->var.xres * 2 * y) + (x * 2);
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/* printk("IMAGE_BLIT\n"); */
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bufptr = dev_info->buf;
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for (i = y; i < y + height; i++) {
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if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
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ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
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bufptr = dev_info->buf;
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}
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rem = width;
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/* printk("WRITING LINE %d\n", i); */
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while (rem) {
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if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
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ret =
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dlfb_bulk_msg(dev_info,
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bufptr - dev_info->buf);
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bufptr = dev_info->buf;
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}
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// number of pixels to consider this time
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thistime = rem;
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if (thistime > 255)
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thistime = 255;
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// find position of first pixel that has changed
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firstdiff = -1;
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for (j = 0; j < thistime * 2; j++) {
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if (dev_info->backing_buffer
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[base - dev_info->base16 + j] != data[j]) {
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firstdiff = j / 2;
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break;
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}
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}
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if (firstdiff >= 0) {
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char *end_of_rle;
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end_of_rle =
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rle_compress16((uint16_t *) (data +
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firstdiff * 2),
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bufptr,
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thistime - firstdiff);
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if (end_of_rle <
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bufptr + 6 + 2 * (thistime - firstdiff)) {
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bufptr[0] = 0xAF;
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bufptr[1] = 0x69;
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bufptr[2] =
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(char)((base +
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firstdiff * 2) >> 16);
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bufptr[3] =
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(char)((base + firstdiff * 2) >> 8);
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bufptr[4] =
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(char)(base + firstdiff * 2);
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bufptr[5] = thistime - firstdiff;
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bufptr = end_of_rle;
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} else {
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// fallback to raw (or some other encoding?)
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*bufptr++ = 0xAF;
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*bufptr++ = 0x68;
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*bufptr++ =
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(char)((base +
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firstdiff * 2) >> 16);
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*bufptr++ =
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(char)((base + firstdiff * 2) >> 8);
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*bufptr++ =
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(char)(base + firstdiff * 2);
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*bufptr++ = thistime - firstdiff;
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// PUT COMPRESSION HERE
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for (j = firstdiff * 2;
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j < thistime * 2; j += 2) {
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*bufptr++ = data[j + 1];
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*bufptr++ = data[j];
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}
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}
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}
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base += thistime * 2;
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data += thistime * 2;
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rem -= thistime;
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}
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memcpy(dev_info->backing_buffer + (base - dev_info->base16) -
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(width * 2), data - (width * 2), width * 2);
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base += (dev_info->info->var.xres * 2) - (width * 2);
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data += (dev_info->info->var.xres * 2) - (width * 2);
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}
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if (bufptr > dev_info->buf) {
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ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
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}
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mutex_unlock(&dev_info->bulk_mutex);
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return base;
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}
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static int
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draw_rect(struct dlfb_data *dev_info, int x, int y, int width, int height,
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unsigned char red, unsigned char green, unsigned char blue)
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{
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int i, j, base;
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int ret;
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unsigned short col =
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(((((red) & 0xF8) | ((green) >> 5)) & 0xFF) << 8) +
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(((((green) & 0x1C) << 3) | ((blue) >> 3)) & 0xFF);
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int rem = width;
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char *bufptr;
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if (x + width > dev_info->info->var.xres)
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return -EINVAL;
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if (y + height > dev_info->info->var.yres)
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return -EINVAL;
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mutex_lock(&dev_info->bulk_mutex);
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base = dev_info->base16 + (dev_info->info->var.xres * 2 * y) + (x * 2);
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bufptr = dev_info->buf;
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for (i = y; i < y + height; i++) {
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for (j = 0; j < width * 2; j += 2) {
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dev_info->backing_buffer[base - dev_info->base16 + j] =
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(char)(col >> 8);
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dev_info->backing_buffer[base - dev_info->base16 + j +
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1] = (char)(col);
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}
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if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
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ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
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bufptr = dev_info->buf;
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}
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rem = width;
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while (rem) {
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if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
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ret =
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dlfb_bulk_msg(dev_info,
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bufptr - dev_info->buf);
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bufptr = dev_info->buf;
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}
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*bufptr++ = 0xAF;
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*bufptr++ = 0x69;
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*bufptr++ = (char)(base >> 16);
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*bufptr++ = (char)(base >> 8);
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*bufptr++ = (char)(base);
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if (rem > 255) {
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*bufptr++ = 255;
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*bufptr++ = 255;
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rem -= 255;
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base += 255 * 2;
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} else {
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*bufptr++ = rem;
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*bufptr++ = rem;
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base += rem * 2;
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rem = 0;
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}
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*bufptr++ = (char)(col >> 8);
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*bufptr++ = (char)(col);
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}
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base += (dev_info->info->var.xres * 2) - (width * 2);
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}
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if (bufptr > dev_info->buf)
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ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
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mutex_unlock(&dev_info->bulk_mutex);
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return 1;
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}
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static void swapfb(struct dlfb_data *dev_info)
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{
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int tmpbase;
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char *bufptr;
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mutex_lock(&dev_info->bulk_mutex);
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tmpbase = dev_info->base16;
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dev_info->base16 = dev_info->base16d;
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dev_info->base16d = tmpbase;
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bufptr = dev_info->buf;
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bufptr = dlfb_set_register(bufptr, 0xFF, 0x00);
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// set addresses
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bufptr =
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dlfb_set_register(bufptr, 0x20, (char)(dev_info->base16 >> 16));
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bufptr = dlfb_set_register(bufptr, 0x21, (char)(dev_info->base16 >> 8));
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bufptr = dlfb_set_register(bufptr, 0x22, (char)(dev_info->base16));
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bufptr = dlfb_set_register(bufptr, 0xFF, 0x00);
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dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
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mutex_unlock(&dev_info->bulk_mutex);
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}
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static int copyfb(struct dlfb_data *dev_info)
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{
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int base;
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int source;
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int rem;
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int i, ret;
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char *bufptr;
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base = dev_info->base16d;
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mutex_lock(&dev_info->bulk_mutex);
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source = dev_info->base16;
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bufptr = dev_info->buf;
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for (i = 0; i < dev_info->info->var.yres; i++) {
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if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
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ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
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bufptr = dev_info->buf;
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}
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rem = dev_info->info->var.xres;
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while (rem) {
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if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
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ret =
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dlfb_bulk_msg(dev_info,
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bufptr - dev_info->buf);
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bufptr = dev_info->buf;
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}
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*bufptr++ = 0xAF;
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*bufptr++ = 0x6A;
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*bufptr++ = (char)(base >> 16);
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*bufptr++ = (char)(base >> 8);
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*bufptr++ = (char)(base);
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if (rem > 255) {
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*bufptr++ = 255;
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*bufptr++ = (char)(source >> 16);
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*bufptr++ = (char)(source >> 8);
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*bufptr++ = (char)(source);
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rem -= 255;
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base += 255 * 2;
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source += 255 * 2;
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} else {
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*bufptr++ = rem;
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*bufptr++ = (char)(source >> 16);
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*bufptr++ = (char)(source >> 8);
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*bufptr++ = (char)(source);
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base += rem * 2;
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source += rem * 2;
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rem = 0;
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}
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}
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}
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if (bufptr > dev_info->buf)
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ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
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mutex_unlock(&dev_info->bulk_mutex);
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return 1;
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}
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static int
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copyarea(struct dlfb_data *dev_info, int dx, int dy, int sx, int sy,
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int width, int height)
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{
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int base;
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int source;
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int rem;
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int i, ret;
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char *bufptr;
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if (dx + width > dev_info->info->var.xres)
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return -EINVAL;
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if (dy + height > dev_info->info->var.yres)
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return -EINVAL;
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mutex_lock(&dev_info->bulk_mutex);
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base =
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dev_info->base16 + (dev_info->info->var.xres * 2 * dy) + (dx * 2);
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source = (dev_info->info->var.xres * 2 * sy) + (sx * 2);
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bufptr = dev_info->buf;
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for (i = sy; i < sy + height; i++) {
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memcpy(dev_info->backing_buffer + base - dev_info->base16,
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dev_info->backing_buffer + source, width * 2);
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if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
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ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
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bufptr = dev_info->buf;
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}
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rem = width;
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while (rem) {
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if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
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ret =
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dlfb_bulk_msg(dev_info,
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bufptr - dev_info->buf);
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bufptr = dev_info->buf;
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}
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*bufptr++ = 0xAF;
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*bufptr++ = 0x6A;
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*bufptr++ = (char)(base >> 16);
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*bufptr++ = (char)(base >> 8);
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*bufptr++ = (char)(base);
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if (rem > 255) {
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*bufptr++ = 255;
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*bufptr++ = (char)(source >> 16);
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*bufptr++ = (char)(source >> 8);
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*bufptr++ = (char)(source);
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rem -= 255;
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base += 255 * 2;
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source += 255 * 2;
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} else {
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*bufptr++ = rem;
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*bufptr++ = (char)(source >> 16);
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*bufptr++ = (char)(source >> 8);
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*bufptr++ = (char)(source);
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base += rem * 2;
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source += rem * 2;
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rem = 0;
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}
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}
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base += (dev_info->info->var.xres * 2) - (width * 2);
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source += (dev_info->info->var.xres * 2) - (width * 2);
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}
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if (bufptr > dev_info->buf)
|
|
ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
|
|
|
|
mutex_unlock(&dev_info->bulk_mutex);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void dlfb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
|
|
{
|
|
|
|
struct dlfb_data *dev = info->par;
|
|
|
|
copyarea(dev, area->dx, area->dy, area->sx, area->sy, area->width,
|
|
area->height);
|
|
|
|
/* printk("COPY AREA %d %d %d %d %d %d !!!\n", area->dx, area->dy, area->sx, area->sy, area->width, area->height); */
|
|
|
|
}
|
|
|
|
static void dlfb_imageblit(struct fb_info *info, const struct fb_image *image)
|
|
{
|
|
|
|
int ret;
|
|
struct dlfb_data *dev = info->par;
|
|
/* printk("IMAGE BLIT (1) %d %d %d %d DEPTH %d {%p}!!!\n", image->dx, image->dy, image->width, image->height, image->depth, dev->udev); */
|
|
cfb_imageblit(info, image);
|
|
ret =
|
|
image_blit(dev, image->dx, image->dy, image->width, image->height,
|
|
info->screen_base);
|
|
/* printk("IMAGE BLIT (2) %d %d %d %d DEPTH %d {%p} %d!!!\n", image->dx, image->dy, image->width, image->height, image->depth, dev->udev, ret); */
|
|
}
|
|
|
|
static void dlfb_fillrect(struct fb_info *info,
|
|
const struct fb_fillrect *region)
|
|
{
|
|
|
|
unsigned char red, green, blue;
|
|
struct dlfb_data *dev = info->par;
|
|
|
|
memcpy(&red, ®ion->color, 1);
|
|
memcpy(&green, ®ion->color + 1, 1);
|
|
memcpy(&blue, ®ion->color + 2, 1);
|
|
draw_rect(dev, region->dx, region->dy, region->width, region->height,
|
|
red, green, blue);
|
|
/* printk("FILL RECT %d %d !!!\n", region->dx, region->dy); */
|
|
|
|
}
|
|
|
|
static int dlfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
|
|
{
|
|
|
|
struct dlfb_data *dev_info = info->par;
|
|
struct dloarea *area = NULL;
|
|
|
|
if (cmd == 0xAD) {
|
|
char *edid = (char *)arg;
|
|
dlfb_edid(dev_info);
|
|
if (copy_to_user(edid, dev_info->edid, 128)) {
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (cmd == 0xAA || cmd == 0xAB || cmd == 0xAC) {
|
|
|
|
area = (struct dloarea *)arg;
|
|
|
|
if (area->x < 0)
|
|
area->x = 0;
|
|
|
|
if (area->x > info->var.xres)
|
|
area->x = info->var.xres;
|
|
|
|
if (area->y < 0)
|
|
area->y = 0;
|
|
|
|
if (area->y > info->var.yres)
|
|
area->y = info->var.yres;
|
|
}
|
|
|
|
if (cmd == 0xAA) {
|
|
image_blit(dev_info, area->x, area->y, area->w, area->h,
|
|
info->screen_base);
|
|
}
|
|
if (cmd == 0xAC) {
|
|
copyfb(dev_info);
|
|
image_blit(dev_info, area->x, area->y, area->w, area->h,
|
|
info->screen_base);
|
|
swapfb(dev_info);
|
|
} else if (cmd == 0xAB) {
|
|
|
|
if (area->x2 < 0)
|
|
area->x2 = 0;
|
|
|
|
if (area->y2 < 0)
|
|
area->y2 = 0;
|
|
|
|
copyarea(dev_info,
|
|
area->x2, area->y2, area->x, area->y, area->w,
|
|
area->h);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* taken from vesafb */
|
|
|
|
static int
|
|
dlfb_setcolreg(unsigned regno, unsigned red, unsigned green,
|
|
unsigned blue, unsigned transp, struct fb_info *info)
|
|
{
|
|
int err = 0;
|
|
|
|
if (regno >= info->cmap.len)
|
|
return 1;
|
|
|
|
if (regno < 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);
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int dlfb_release(struct fb_info *info, int user)
|
|
{
|
|
struct dlfb_data *dev_info = info->par;
|
|
image_blit(dev_info, 0, 0, info->var.xres, info->var.yres,
|
|
info->screen_base);
|
|
return 0;
|
|
}
|
|
|
|
static int dlfb_blank(int blank_mode, struct fb_info *info)
|
|
{
|
|
struct dlfb_data *dev_info = info->par;
|
|
char *bufptr = dev_info->buf;
|
|
|
|
bufptr = dlfb_set_register(bufptr, 0xFF, 0x00);
|
|
if (blank_mode != FB_BLANK_UNBLANK) {
|
|
bufptr = dlfb_set_register(bufptr, 0x1F, 0x01);
|
|
} else {
|
|
bufptr = dlfb_set_register(bufptr, 0x1F, 0x00);
|
|
}
|
|
bufptr = dlfb_set_register(bufptr, 0xFF, 0xFF);
|
|
|
|
dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct fb_ops dlfb_ops = {
|
|
.fb_setcolreg = dlfb_setcolreg,
|
|
.fb_fillrect = dlfb_fillrect,
|
|
.fb_copyarea = dlfb_copyarea,
|
|
.fb_imageblit = dlfb_imageblit,
|
|
.fb_mmap = dlfb_mmap,
|
|
.fb_ioctl = dlfb_ioctl,
|
|
.fb_release = dlfb_release,
|
|
.fb_blank = dlfb_blank,
|
|
};
|
|
|
|
static int
|
|
dlfb_probe(struct usb_interface *interface, const struct usb_device_id *id)
|
|
{
|
|
struct dlfb_data *dev_info;
|
|
struct fb_info *info;
|
|
|
|
int ret;
|
|
char rbuf[4];
|
|
|
|
dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL);
|
|
if (dev_info == NULL) {
|
|
printk("cannot allocate dev_info structure.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
mutex_init(&dev_info->bulk_mutex);
|
|
|
|
dev_info->udev = usb_get_dev(interface_to_usbdev(interface));
|
|
dev_info->interface = interface;
|
|
|
|
printk("DisplayLink device attached\n");
|
|
|
|
/* add framebuffer info to usb interface */
|
|
usb_set_intfdata(interface, dev_info);
|
|
|
|
dev_info->buf = kmalloc(BUF_SIZE, GFP_KERNEL);
|
|
/* usb_buffer_alloc(dev_info->udev, BUF_SIZE , GFP_KERNEL, &dev_info->tx_urb->transfer_dma); */
|
|
|
|
if (dev_info->buf == NULL) {
|
|
printk("unable to allocate memory for dlfb commands\n");
|
|
goto out;
|
|
}
|
|
dev_info->bufend = dev_info->buf + BUF_SIZE;
|
|
|
|
dev_info->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
usb_fill_bulk_urb(dev_info->tx_urb, dev_info->udev,
|
|
usb_sndbulkpipe(dev_info->udev, 1), dev_info->buf, 0,
|
|
dlfb_bulk_callback, dev_info);
|
|
|
|
ret =
|
|
usb_control_msg(dev_info->udev, usb_rcvctrlpipe(dev_info->udev, 0),
|
|
(0x06), (0x80 | (0x02 << 5)), 0, 0, rbuf, 4, 0);
|
|
printk("ret control msg 0: %d %x%x%x%x\n", ret, rbuf[0], rbuf[1],
|
|
rbuf[2], rbuf[3]);
|
|
|
|
dlfb_edid(dev_info);
|
|
|
|
info = framebuffer_alloc(sizeof(u32) * 256, &dev_info->udev->dev);
|
|
|
|
if (!info) {
|
|
printk("non posso allocare il framebuffer displaylink");
|
|
goto out;
|
|
}
|
|
|
|
fb_parse_edid(dev_info->edid, &info->var);
|
|
|
|
printk("EDID XRES %d YRES %d\n", info->var.xres, info->var.yres);
|
|
|
|
if (dlfb_set_video_mode(dev_info, info->var.xres, info->var.yres) != 0) {
|
|
info->var.xres = 1280;
|
|
info->var.yres = 1024;
|
|
if (dlfb_set_video_mode
|
|
(dev_info, info->var.xres, info->var.yres) != 0) {
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
printk("found valid mode...%d\n", info->var.pixclock);
|
|
|
|
info->pseudo_palette = info->par;
|
|
info->par = dev_info;
|
|
|
|
dev_info->info = info;
|
|
|
|
info->flags =
|
|
FBINFO_DEFAULT | FBINFO_READS_FAST | FBINFO_HWACCEL_IMAGEBLIT |
|
|
FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;
|
|
info->fbops = &dlfb_ops;
|
|
info->screen_base = rvmalloc(dev_info->screen_size);
|
|
|
|
if (info->screen_base == NULL) {
|
|
printk
|
|
("cannot allocate framebuffer virtual memory of %d bytes\n",
|
|
dev_info->screen_size);
|
|
goto out0;
|
|
}
|
|
|
|
printk("screen base allocated !!!\n");
|
|
|
|
dev_info->backing_buffer = kzalloc(dev_info->screen_size, GFP_KERNEL);
|
|
|
|
if (!dev_info->backing_buffer)
|
|
printk("non posso allocare il backing buffer\n");
|
|
|
|
/* info->var = dev_info->si; */
|
|
|
|
info->var.bits_per_pixel = 16;
|
|
info->var.activate = FB_ACTIVATE_TEST;
|
|
info->var.vmode = FB_VMODE_NONINTERLACED;
|
|
|
|
info->var.red.offset = 11;
|
|
info->var.red.length = 5;
|
|
info->var.red.msb_right = 0;
|
|
|
|
info->var.green.offset = 5;
|
|
info->var.green.length = 6;
|
|
info->var.green.msb_right = 0;
|
|
|
|
info->var.blue.offset = 0;
|
|
info->var.blue.length = 5;
|
|
info->var.blue.msb_right = 0;
|
|
|
|
/* info->var.pixclock = (10000000 / FB_W * 1000 / FB_H)/2 ; */
|
|
|
|
info->fix.smem_start = (unsigned long)info->screen_base;
|
|
info->fix.smem_len = PAGE_ALIGN(dev_info->screen_size);
|
|
if (strlen(dev_info->udev->product) > 15) {
|
|
memcpy(info->fix.id, dev_info->udev->product, 15);
|
|
} else {
|
|
memcpy(info->fix.id, dev_info->udev->product,
|
|
strlen(dev_info->udev->product));
|
|
}
|
|
info->fix.type = FB_TYPE_PACKED_PIXELS;
|
|
info->fix.visual = FB_VISUAL_TRUECOLOR;
|
|
info->fix.accel = info->flags;
|
|
info->fix.line_length = dev_info->line_length;
|
|
|
|
if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
|
|
goto out1;
|
|
|
|
printk("colormap allocated\n");
|
|
if (register_framebuffer(info) < 0)
|
|
goto out2;
|
|
|
|
draw_rect(dev_info, 0, 0, dev_info->info->var.xres,
|
|
dev_info->info->var.yres, 0x30, 0xff, 0x30);
|
|
|
|
return 0;
|
|
|
|
out2:
|
|
fb_dealloc_cmap(&info->cmap);
|
|
out1:
|
|
rvfree(info->screen_base, dev_info->screen_size);
|
|
out0:
|
|
framebuffer_release(info);
|
|
out:
|
|
usb_set_intfdata(interface, NULL);
|
|
usb_put_dev(dev_info->udev);
|
|
kfree(dev_info);
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
static void dlfb_disconnect(struct usb_interface *interface)
|
|
{
|
|
struct dlfb_data *dev_info = usb_get_intfdata(interface);
|
|
|
|
mutex_unlock(&dev_info->bulk_mutex);
|
|
|
|
usb_kill_urb(dev_info->tx_urb);
|
|
usb_free_urb(dev_info->tx_urb);
|
|
usb_set_intfdata(interface, NULL);
|
|
usb_put_dev(dev_info->udev);
|
|
|
|
if (dev_info->info) {
|
|
unregister_framebuffer(dev_info->info);
|
|
fb_dealloc_cmap(&dev_info->info->cmap);
|
|
rvfree(dev_info->info->screen_base, dev_info->screen_size);
|
|
kfree(dev_info->backing_buffer);
|
|
framebuffer_release(dev_info->info);
|
|
|
|
}
|
|
|
|
kfree(dev_info);
|
|
|
|
printk("DisplayLink device disconnected\n");
|
|
}
|
|
|
|
static struct usb_driver dlfb_driver = {
|
|
.name = "udlfb",
|
|
.probe = dlfb_probe,
|
|
.disconnect = dlfb_disconnect,
|
|
.id_table = id_table,
|
|
};
|
|
|
|
static int __init dlfb_init(void)
|
|
{
|
|
int res;
|
|
|
|
dlfb_init_modes();
|
|
|
|
res = usb_register(&dlfb_driver);
|
|
if (res)
|
|
err("usb_register failed. Error number %d", res);
|
|
|
|
printk("VMODES initialized\n");
|
|
|
|
return res;
|
|
}
|
|
|
|
static void __exit dlfb_exit(void)
|
|
{
|
|
usb_deregister(&dlfb_driver);
|
|
}
|
|
|
|
module_init(dlfb_init);
|
|
module_exit(dlfb_exit);
|
|
|
|
MODULE_AUTHOR("Roberto De Ioris <roberto@unbit.it>");
|
|
MODULE_DESCRIPTION(DRIVER_VERSION);
|
|
MODULE_LICENSE("GPL");
|