-/*****************************************************************************
- * DLFB Kernel Driver *
- * Version 0.2 (udlfb) *
- * (C) 2009 Roberto De Ioris <roberto@unbit.it> *
- * *
- * This file is licensed under the GPLv2. See COPYING in the package. *
- * Based on the amazing work of Florian Echtler and libdlo 0.1 *
- * *
- * *
- * 10.06.09 release 0.2.3 (edid ioctl, fallback for unsupported modes) *
- * 05.06.09 release 0.2.2 (real screen blanking, rle compression, double buffer) *
- * 31.05.09 release 0.2 *
- * 22.05.09 First public (ugly) release *
- *****************************************************************************/
+/*
+ * udlfb.c -- Framebuffer driver for DisplayLink USB controller
+ *
+ * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
+ * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License v2. See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ * Layout is based on skeletonfb by James Simmons and Geert Uytterhoeven,
+ * usb-skeleton by GregKH.
+ *
+ * Device-specific portions based on information from Displaylink, with work
+ * from Florian Echtler, Henrik Bjerregaard Pedersen, and others.
+ */
#include <linux/module.h>
#include <linux/kernel.h>
#include "udlfb.h"
-#define DRIVER_VERSION "DLFB 0.2"
+#define DRIVER_VERSION "DisplayLink Framebuffer Driver 0.4.1"
+
+static struct fb_fix_screeninfo dlfb_fix = {
+ .id = "displaylinkfb",
+ .type = FB_TYPE_PACKED_PIXELS,
+ .visual = FB_VISUAL_TRUECOLOR,
+ .xpanstep = 0,
+ .ypanstep = 0,
+ .ywrapstep = 0,
+ .accel = FB_ACCEL_NONE,
+};
-/* memory functions taken from vfb */
+#define NR_USB_REQUEST_I2C_SUB_IO 0x02
+#define NR_USB_REQUEST_CHANNEL 0x12
-static void *rvmalloc(unsigned long size)
+/*
+ * Inserts a specific DisplayLink controller command into the provided
+ * buffer.
+ */
+static char *insert_command(char *buf, u8 reg, u8 val)
{
- void *mem;
- unsigned long adr;
+ *buf++ = 0xAF;
+ *buf++ = 0x20;
+ *buf++ = reg;
+ *buf++ = val;
+ return buf;
+}
- size = PAGE_ALIGN(size);
- mem = vmalloc_32(size);
- if (!mem)
- return NULL;
+static char *insert_vidreg_lock(char *buf)
+{
+ return insert_command(buf, 0xFF, 0x00);
+}
- memset(mem, 0, size); /* Clear the ram out, no junk to the user */
- adr = (unsigned long)mem;
- while (size > 0) {
- SetPageReserved(vmalloc_to_page((void *)adr));
- adr += PAGE_SIZE;
- size -= PAGE_SIZE;
+static char *insert_vidreg_unlock(char *buf)
+{
+ return insert_command(buf, 0xFF, 0xFF);
+}
+
+/*
+ * Once you send this command, the DisplayLink framebuffer gets driven to the
+ * display.
+ */
+static char *insert_enable_hvsync(char *buf)
+{
+ return insert_command(buf, 0x1F, 0x00);
+}
+
+static char *insert_set_color_depth(char *buf, u8 selection)
+{
+ return insert_command(buf, 0x00, selection);
+}
+
+static char *insert_set_base16bpp(char *wrptr, u32 base)
+{
+ /* the base pointer is 16 bits wide, 0x20 is hi byte. */
+ wrptr = insert_command(wrptr, 0x20, base >> 16);
+ wrptr = insert_command(wrptr, 0x21, base >> 8);
+ return insert_command(wrptr, 0x22, base);
+}
+
+static char *insert_set_base8bpp(char *wrptr, u32 base)
+{
+ wrptr = insert_command(wrptr, 0x26, base >> 16);
+ wrptr = insert_command(wrptr, 0x27, base >> 8);
+ return insert_command(wrptr, 0x28, base);
+}
+
+static char *insert_command_16(char *wrptr, u8 reg, u16 value)
+{
+ wrptr = insert_command(wrptr, reg, value >> 8);
+ return insert_command(wrptr, reg+1, value);
+}
+
+/*
+ * This is kind of weird because the controller takes some
+ * register values in a different byte order than other registers.
+ */
+static char *insert_command_16be(char *wrptr, u8 reg, u16 value)
+{
+ wrptr = insert_command(wrptr, reg, value);
+ return insert_command(wrptr, reg+1, value >> 8);
+}
+
+/*
+ * LFSR is linear feedback shift register. The reason we have this is
+ * because the display controller needs to minimize the clock depth of
+ * various counters used in the display path. So this code reverses the
+ * provided value into the lfsr16 value by counting backwards to get
+ * the value that needs to be set in the hardware comparator to get the
+ * same actual count. This makes sense once you read above a couple of
+ * times and think about it from a hardware perspective.
+ */
+static u16 lfsr16(u16 actual_count)
+{
+ u32 lv = 0xFFFF; /* This is the lfsr value that the hw starts with */
+
+ while (actual_count--) {
+ lv = ((lv << 1) |
+ (((lv >> 15) ^ (lv >> 4) ^ (lv >> 2) ^ (lv >> 1)) & 1))
+ & 0xFFFF;
}
- return mem;
+ return (u16) lv;
+}
+
+/*
+ * This does LFSR conversion on the value that is to be written.
+ * See LFSR explanation above for more detail.
+ */
+static char *insert_command_lfsr16(char *wrptr, u8 reg, u16 value)
+{
+ return insert_command_16(wrptr, reg, lfsr16(value));
}
-static void rvfree(void *mem, unsigned long size)
+/*
+ * This takes a standard fbdev screeninfo struct and all of its monitor mode
+ * details and converts them into the DisplayLink equivalent register commands.
+ */
+static char *insert_set_vid_cmds(char *wrptr, struct fb_var_screeninfo *var)
{
- unsigned long adr;
+ u16 xds, yds;
+ u16 xde, yde;
+ u16 yec;
+
+
+ /* x display start */
+ xds = var->left_margin + var->hsync_len;
+ wrptr = insert_command_lfsr16(wrptr, 0x01, xds);
+ /* x display end */
+ xde = xds + var->xres;
+ wrptr = insert_command_lfsr16(wrptr, 0x03, xde);
+
+ /* y display start */
+ yds = var->upper_margin + var->vsync_len;
+ wrptr = insert_command_lfsr16(wrptr, 0x05, yds);
+ /* y display end */
+ yde = yds + var->yres;
+ wrptr = insert_command_lfsr16(wrptr, 0x07, yde);
+
+ /* x end count is active + blanking - 1 */
+ wrptr = insert_command_lfsr16(wrptr, 0x09, xde + var->right_margin - 1);
+
+ /* libdlo hardcodes hsync start to 1 */
+ wrptr = insert_command_lfsr16(wrptr, 0x0B, 1);
+
+ /* hsync end is width of sync pulse + 1 */
+ wrptr = insert_command_lfsr16(wrptr, 0x0D, var->hsync_len + 1);
+
+ /* hpixels is active pixels */
+ wrptr = insert_command_16(wrptr, 0x0F, var->xres);
- if (!mem)
- return;
+ /* yendcount is vertical active + vertical blanking */
+ yec = var->yres + var->upper_margin + var->lower_margin +
+ var->vsync_len;
+ wrptr = insert_command_lfsr16(wrptr, 0x11, yec);
- adr = (unsigned long)mem;
- while ((long)size > 0) {
- ClearPageReserved(vmalloc_to_page((void *)adr));
- adr += PAGE_SIZE;
- size -= PAGE_SIZE;
+ /* libdlo hardcodes vsync start to 0 */
+ wrptr = insert_command_lfsr16(wrptr, 0x13, 0);
+
+ /* vsync end is width of vsync pulse */
+ wrptr = insert_command_lfsr16(wrptr, 0x15, var->vsync_len);
+
+ /* vpixels is active pixels */
+ wrptr = insert_command_16(wrptr, 0x17, var->yres);
+
+ /* convert picoseconds to 5kHz multiple for pclk5k = x * 1E12/5k */
+ wrptr = insert_command_16be(wrptr, 0x1B, 200*1000*1000/var->pixclock);
+
+ return wrptr;
+}
+
+/*
+ * This takes a standard fbdev screeninfo struct that was fetched or prepared
+ * and then generates the appropriate command sequence that then drives the
+ * display controller.
+ */
+static int dlfb_set_video_mode(struct dlfb_data *dev,
+ struct fb_var_screeninfo *var)
+{
+ char *buf;
+ char *wrptr;
+ int retval = 0;
+ int writesize;
+
+ buf = dev->buf;
+
+ /*
+ * This first section has to do with setting the base address on the
+ * controller * associated with the display. There are 2 base
+ * pointers, currently, we only * use the 16 bpp segment.
+ */
+ wrptr = insert_vidreg_lock(buf);
+ wrptr = insert_set_color_depth(wrptr, 0x00);
+ /* set base for 16bpp segment to 0 */
+ wrptr = insert_set_base16bpp(wrptr, 0);
+ /* set base for 8bpp segment to end of fb */
+ wrptr = insert_set_base8bpp(wrptr, dev->info->fix.smem_len);
+
+ wrptr = insert_set_vid_cmds(wrptr, var);
+ wrptr = insert_enable_hvsync(wrptr);
+ wrptr = insert_vidreg_unlock(wrptr);
+
+ writesize = wrptr - buf;
+
+ mutex_lock(&dev->bulk_mutex);
+ if (!dev->interface) { /* disconnect() was called */
+ mutex_unlock(&dev->bulk_mutex);
+ retval = -ENODEV;
+ goto error;
}
- vfree(mem);
+
+ retval = dlfb_bulk_msg(dev, writesize);
+ mutex_unlock(&dev->bulk_mutex);
+ if (retval) {
+ dev_err(&dev->udev->dev, "Problem %d with submit write bulk.\n",
+ retval);
+ goto error;
+ }
+
+ return 0;
+
+error:
+ return retval;
+}
+
+/*
+ * This is necessary before we can communicate with the display controller.
+ */
+static int dlfb_select_std_channel(struct dlfb_data *dev)
+{
+ int ret;
+ u8 set_def_chn[] = { 0x57, 0xCD, 0xDC, 0xA7,
+ 0x1C, 0x88, 0x5E, 0x15,
+ 0x60, 0xFE, 0xC6, 0x97,
+ 0x16, 0x3D, 0x47, 0xF2 };
+
+ ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
+ NR_USB_REQUEST_CHANNEL,
+ (USB_DIR_OUT | USB_TYPE_VENDOR), 0, 0,
+ set_def_chn, sizeof(set_def_chn), USB_CTRL_SET_TIMEOUT);
+ return ret;
+}
+
+
+/*
+ * Query EDID from the handware, then hand it off to fbdev's edid parse
+ * routine which should give us back a filled in screeninfo structure.
+ */
+static int dlfb_get_var_from_edid(struct dlfb_data *dev,
+ struct fb_var_screeninfo *var)
+{
+ int ret;
+
+ dlfb_edid(dev);
+ ret = fb_parse_edid(dev->edid, var);
+
+ return ret;
}
static int dlfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
};
/*
-static struct usb_device_id id_table [] = {
- { USB_DEVICE(0x17e9, 0x023d) },
- { }
-};
-*/
-
+ * There are many DisplayLink-based products, all with unique PIDs. We are able
+ * to support all volume ones (circa 2009) with a single driver, so we match
+ * globally on VID. TODO: Probe() needs to detect when we might be running
+ * "future" chips, and bail on those, so a compatible driver can match.
+ */
static struct usb_device_id id_table[] = {
{.idVendor = 0x17e9, .match_flags = USB_DEVICE_ID_MATCH_VENDOR,},
{},
if (thistime > 255)
thistime = 255;
- // find position of first pixel that has changed
- firstdiff = -1;
- for (j = 0; j < thistime * 2; j++) {
- if (dev_info->backing_buffer
- [base - dev_info->base16 + j] != data[j]) {
- firstdiff = j / 2;
- break;
+ if (dev_info->backing_buffer) {
+ /* find first pixel that has changed */
+ firstdiff = -1;
+ for (j = 0; j < thistime * 2; j++) {
+ if (dev_info->backing_buffer
+ [base - dev_info->base16 + j]
+ != data[j]) {
+ firstdiff = j / 2;
+ break;
+ }
}
+
+ } else {
+ firstdiff = 0;
+
}
if (firstdiff >= 0) {
rem -= thistime;
}
- memcpy(dev_info->backing_buffer + (base - dev_info->base16) -
- (width * 2), data - (width * 2), width * 2);
+ if (dev_info->backing_buffer)
+ memcpy(dev_info->backing_buffer +
+ (base - dev_info->base16) -
+ (width * 2), data - (width * 2), width * 2);
base += (dev_info->info->var.xres * 2) - (width * 2);
data += (dev_info->info->var.xres * 2) - (width * 2);
for (i = y; i < y + height; i++) {
- for (j = 0; j < width * 2; j += 2) {
- dev_info->backing_buffer[base - dev_info->base16 + j] =
- (char)(col >> 8);
- dev_info->backing_buffer[base - dev_info->base16 + j +
- 1] = (char)(col);
+ if (dev_info->backing_buffer) {
+ for (j = 0; j < width * 2; j += 2) {
+ dev_info->backing_buffer
+ [base - dev_info->base16 + j] =
+ (char)(col >> 8);
+ dev_info->backing_buffer
+ [base - dev_info->base16 + j + 1] =
+ (char)(col);
+ }
}
+
if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
bufptr = dev_info->buf;
.fb_blank = dlfb_blank,
};
-static int
-dlfb_probe(struct usb_interface *interface, const struct usb_device_id *id)
+static int dlfb_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
{
- struct dlfb_data *dev_info;
+ struct device *mydev;
+ struct usb_device *usbdev;
+ struct dlfb_data *dev;
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;
+ int videomemorysize;
+ unsigned char *videomemory;
+ int retval = -ENOMEM;
+ struct fb_var_screeninfo *var;
+ struct fb_bitfield red = { 11, 5, 0 };
+ struct fb_bitfield green = { 5, 6, 0 };
+ struct fb_bitfield blue = { 0, 5, 0 };
+
+ usbdev = usb_get_dev(interface_to_usbdev(interface));
+ mydev = &usbdev->dev;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (dev == NULL) {
+ dev_err(mydev, "failed alloc of dev struct\n");
+ goto err_devalloc;
}
- 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;
+ mutex_init(&dev->bulk_mutex);
+ dev->udev = usbdev;
+ dev->interface = interface;
+ usb_set_intfdata(interface, dev);
+
+ dev_info(mydev, "dlfb_probe: setting up DisplayLink device\n");
+
+ /*
+ * TODO: replace single 64K buffer with buffer list
+ * and async dispatch
+ */
+ dev->buf = kmalloc(BUF_SIZE, GFP_KERNEL);
+ if (dev->buf == NULL) {
+ dev_err(mydev, "unable to allocate memory for dlfb commands\n");
+ goto err_usballoc;
}
-
- 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;
- }
+ dev->bufend = dev->buf + BUF_SIZE;
+
+ dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
+ usb_fill_bulk_urb(dev->tx_urb, dev->udev,
+ usb_sndbulkpipe(dev->udev, 1), dev->buf, 0,
+ dlfb_bulk_callback, dev);
+
+ /* allocates framebuffer driver structure, not framebuffer memory */
+ info = framebuffer_alloc(0, mydev);
+ if (!info)
+ goto err_fballoc;
+
+ dev->info = info;
+ info->par = dev;
+ info->pseudo_palette = dev->pseudo_palette;
+
+ var = &info->var;
+ retval = dlfb_get_var_from_edid(dev, var);
+ if (retval) {
+ /* had a problem getting edid. so fallback to 640x480 */
+ dev_err(mydev, "Problem %d with EDID.\n", retval);
+ var->xres = 640;
+ var->yres = 480;
}
- printk("found valid mode...%d\n", info->var.pixclock);
-
- info->pseudo_palette = info->par;
- info->par = dev_info;
-
- dev_info->info = info;
-
+ /*
+ * ok, now that we've got the size info, we can alloc our framebuffer.
+ * We are using 16bpp.
+ */
+ info->var.bits_per_pixel = 16;
+ info->fix = dlfb_fix;
+ info->fix.line_length = var->xres * (var->bits_per_pixel / 8);
+ videomemorysize = info->fix.line_length * var->yres;
+
+ /*
+ * The big chunk of system memory we use as a virtual framebuffer.
+ * Pages don't need to be set RESERVED (non-swap) immediately on 2.6
+ * remap_pfn_page() syscall in our mmap and/or defio will handle.
+ */
+ videomemory = vmalloc(videomemorysize);
+ if (!videomemory)
+ goto err_vidmem;
+ memset(videomemory, 0, videomemorysize);
+
+ info->screen_base = videomemory;
+ info->fix.smem_len = PAGE_ALIGN(videomemorysize);
+ info->fix.smem_start = (unsigned long) videomemory;
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");
+ /*
+ * Second framebuffer copy, mirroring the state of the framebuffer
+ * on the physical USB device. We can function without this.
+ * But with imperfect damage info we may end up sending pixels over USB
+ * that were, in fact, unchanged -- wasting limited USB bandwidth
+ */
+ dev->backing_buffer = vmalloc(dev->screen_size);
+ if (!dev->backing_buffer)
+ dev_info(mydev, "No backing buffer allocated!\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->fbops = &dlfb_ops;
- info->var.red.offset = 11;
- info->var.red.length = 5;
- info->var.red.msb_right = 0;
+ var->vmode = FB_VMODE_NONINTERLACED;
+ var->red = red;
+ var->green = green;
+ var->blue = blue;
- info->var.green.offset = 5;
- info->var.green.length = 6;
- info->var.green.msb_right = 0;
+ /*
+ * TODO: Enable FB_CONFIG_DEFIO support
- info->var.blue.offset = 0;
- info->var.blue.length = 5;
- info->var.blue.msb_right = 0;
+ info->fbdefio = &dlfb_defio;
+ fb_deferred_io_init(info);
- /* 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));
+ retval = fb_alloc_cmap(&info->cmap, 256, 0);
+ if (retval < 0) {
+ dev_err(mydev, "Failed to allocate colormap\n");
+ goto err_cmap;
}
- 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;
+ dlfb_select_std_channel(dev);
+ dlfb_set_video_mode(dev, var);
+ /* TODO: dlfb_dpy_update(dev); */
- printk("colormap allocated\n");
- if (register_framebuffer(info) < 0)
- goto out2;
+ retval = register_framebuffer(info);
+ if (retval < 0)
+ goto err_regfb;
- draw_rect(dev_info, 0, 0, dev_info->info->var.xres,
- dev_info->info->var.yres, 0x30, 0xff, 0x30);
+ /* paint "successful" green screen */
+ draw_rect(dev, 0, 0, dev->info->var.xres,
+ dev->info->var.yres, 0x30, 0xff, 0x30);
+ dev_info(mydev, "DisplayLink USB device %d now attached, "
+ "using %dK of memory\n", info->node,
+ ((dev->backing_buffer) ?
+ videomemorysize * 2 : videomemorysize) >> 10);
return 0;
-out2:
+err_regfb:
fb_dealloc_cmap(&info->cmap);
-out1:
- rvfree(info->screen_base, dev_info->screen_size);
-out0:
+err_cmap:
+ /* TODO: fb_deferred_io_cleanup(info); */
+ vfree(videomemory);
+err_vidmem:
framebuffer_release(info);
-out:
+err_fballoc:
+ kfree(dev->buf);
+err_usballoc:
usb_set_intfdata(interface, NULL);
- usb_put_dev(dev_info->udev);
- kfree(dev_info);
- return -ENOMEM;
-
+ usb_put_dev(dev->udev);
+ kfree(dev);
+err_devalloc:
+ return retval;
}
static void dlfb_disconnect(struct usb_interface *interface)
{
- struct dlfb_data *dev_info = usb_get_intfdata(interface);
-
- mutex_unlock(&dev_info->bulk_mutex);
+ struct dlfb_data *dev;
+ struct fb_info *info;
- usb_kill_urb(dev_info->tx_urb);
- usb_free_urb(dev_info->tx_urb);
+ dev = usb_get_intfdata(interface);
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);
-
+ usb_put_dev(dev->udev);
+
+ /*
+ * TODO: since, upon usb disconnect(), usb will cancel in-flight urbs
+ * and error out any new ones, look at eliminating need for mutex
+ */
+ mutex_lock(&dev->bulk_mutex);
+ dev->interface = NULL;
+ info = dev->info;
+ mutex_unlock(&dev->bulk_mutex);
+
+ if (info) {
+ dev_info(&interface->dev, "Detaching DisplayLink device %d.\n",
+ info->node);
+ unregister_framebuffer(info);
+ fb_dealloc_cmap(&info->cmap);
+ /* TODO: fb_deferred_io_cleanup(info); */
+ fb_dealloc_cmap(&info->cmap);
+ vfree((void __force *)info->screen_base);
+ framebuffer_release(info);
}
- kfree(dev_info);
+ if (dev->backing_buffer)
+ vfree(dev->backing_buffer);
- printk("DisplayLink device disconnected\n");
+ kfree(dev);
}
static struct usb_driver dlfb_driver = {
{
int res;
- dlfb_init_modes();
-
res = usb_register(&dlfb_driver);
if (res)
err("usb_register failed. Error number %d", res);
module_init(dlfb_init);
module_exit(dlfb_exit);
-MODULE_AUTHOR("Roberto De Ioris <roberto@unbit.it>");
+MODULE_AUTHOR("Roberto De Ioris <roberto@unbit.it>, "
+ "Jaya Kumar <jayakumar.lkml@gmail.com>");
MODULE_DESCRIPTION(DRIVER_VERSION);
MODULE_LICENSE("GPL");
#ifndef UDLFB_H
#define UDLFB_H
-#define MAX_VMODES 4
-#define FB_BPP 16
-
-#define STD_CHANNEL "\x57\xCD\xDC\xA7\x1C\x88\x5E\x15" \
- "\x60\xFE\xC6\x97\x16\x3D\x47\xF2"
-
/* as libdlo */
#define BUF_HIGH_WATER_MARK 1024
#define BUF_SIZE (64*1024)
int base16d;
int base8;
int base8d;
+ u32 pseudo_palette[256];
};
-struct dlfb_video_mode {
- uint8_t col;
- uint32_t hclock;
- uint32_t vclock;
- uint8_t unknown1[6];
- uint16_t xres;
- uint8_t unknown2[6];
- uint16_t yres;
- uint8_t unknown3[4];
-} __attribute__ ((__packed__));
-
-static struct dlfb_video_mode dlfb_video_modes[MAX_VMODES];
-
static void dlfb_bulk_callback(struct urb *urb)
{
struct dlfb_data *dev_info = urb->context;
return dev_info->tx_urb->actual_length;
}
-static void dlfb_init_modes(void)
-{
- dlfb_video_modes[0].col = 0;
- memcpy(&dlfb_video_modes[0].hclock, "\x20\x3C\x7A\xC9", 4);
- memcpy(&dlfb_video_modes[0].vclock, "\xF2\x6C\x48\xF9", 4);
- memcpy(&dlfb_video_modes[0].unknown1, "\x70\x53\xFF\xFF\x21\x27", 6);
- dlfb_video_modes[0].xres = 800;
- memcpy(&dlfb_video_modes[0].unknown2, "\x91\xF3\xFF\xFF\xFF\xF9", 6);
- dlfb_video_modes[0].yres = 480;
- memcpy(&dlfb_video_modes[0].unknown3, "\x01\x02\xC8\x19", 4);
-
- dlfb_video_modes[1].col = 0;
- memcpy(&dlfb_video_modes[1].hclock, "\x36\x18\xD5\x10", 4);
- memcpy(&dlfb_video_modes[1].vclock, "\x60\xA9\x7B\x33", 4);
- memcpy(&dlfb_video_modes[1].unknown1, "\xA1\x2B\x27\x32\xFF\xFF", 6);
- dlfb_video_modes[1].xres = 1024;
- memcpy(&dlfb_video_modes[1].unknown2, "\xD9\x9A\xFF\xCA\xFF\xFF", 6);
- dlfb_video_modes[1].yres = 768;
- memcpy(&dlfb_video_modes[1].unknown3, "\x04\x03\xC8\x32", 4);
-
- dlfb_video_modes[2].col = 0;
- memcpy(&dlfb_video_modes[2].hclock, "\x98\xF8\x0D\x57", 4);
- memcpy(&dlfb_video_modes[2].vclock, "\x2A\x55\x4D\x54", 4);
- memcpy(&dlfb_video_modes[2].unknown1, "\xCA\x0D\xFF\xFF\x94\x43", 6);
- dlfb_video_modes[2].xres = 1280;
- memcpy(&dlfb_video_modes[2].unknown2, "\x9A\xA8\xFF\xFF\xFF\xF9", 6);
- dlfb_video_modes[2].yres = 1024;
- memcpy(&dlfb_video_modes[2].unknown3, "\x04\x02\x60\x54", 4);
-
- dlfb_video_modes[3].col = 0;
- memcpy(&dlfb_video_modes[3].hclock, "\x42\x24\x38\x36", 4);
- memcpy(&dlfb_video_modes[3].vclock, "\xC1\x52\xD9\x29", 4);
- memcpy(&dlfb_video_modes[3].unknown1, "\xEA\xB8\x32\x60\xFF\xFF", 6);
- dlfb_video_modes[3].xres = 1400;
- memcpy(&dlfb_video_modes[3].unknown2, "\xC9\x4E\xFF\xFF\xFF\xF2", 6);
- dlfb_video_modes[3].yres = 1050;
- memcpy(&dlfb_video_modes[3].unknown3, "\x04\x02\x1E\x5F", 4);
-}
-
-static char *dlfb_set_register(char *bufptr, uint8_t reg, uint8_t val)
-{
- *bufptr++ = 0xAF;
- *bufptr++ = 0x20;
- *bufptr++ = reg;
- *bufptr++ = val;
-
- return bufptr;
-}
-
-static int dlfb_set_video_mode(struct dlfb_data *dev_info, int width, int height)
-{
- int i, ret;
- unsigned char j;
- char *bufptr = dev_info->buf;
- uint8_t *vdata;
-
- for (i = 0; i < MAX_VMODES; i++) {
- printk("INIT VIDEO %d %d %d\n", i, dlfb_video_modes[i].xres,
- dlfb_video_modes[i].yres);
- if (dlfb_video_modes[i].xres == width
- && dlfb_video_modes[i].yres == height) {
-
- dev_info->base16 = 0;
- dev_info->base16d = width * height * (FB_BPP / 8);
-
- //dev_info->base8 = width * height * (FB_BPP / 8);
-
- dev_info->base8 = dev_info->base16;
- dev_info->base8d = dev_info->base16d;
-
- /* set encryption key (null) */
- memcpy(dev_info->buf, STD_CHANNEL, 16);
- ret =
- usb_control_msg(dev_info->udev,
- usb_sndctrlpipe(dev_info->udev, 0),
- 0x12, (0x02 << 5), 0, 0,
- dev_info->buf, 16, 0);
- printk("ret control msg 1 (STD_CHANNEL): %d\n", ret);
-
- /* set registers */
- bufptr = dlfb_set_register(bufptr, 0xFF, 0x00);
-
- /* set color depth */
- bufptr = dlfb_set_register(bufptr, 0x00, 0x00);
-
- /* set addresses */
- bufptr =
- dlfb_set_register(bufptr, 0x20,
- (char)(dev_info->base16 >> 16));
- bufptr =
- dlfb_set_register(bufptr, 0x21,
- (char)(dev_info->base16 >> 8));
- bufptr =
- dlfb_set_register(bufptr, 0x22,
- (char)(dev_info->base16));
-
- bufptr =
- dlfb_set_register(bufptr, 0x26,
- (char)(dev_info->base8 >> 16));
- bufptr =
- dlfb_set_register(bufptr, 0x27,
- (char)(dev_info->base8 >> 8));
- bufptr =
- dlfb_set_register(bufptr, 0x28,
- (char)(dev_info->base8));
-
- /* set video mode */
- vdata = (uint8_t *)&dlfb_video_modes[i];
- for (j = 0; j < 29; j++)
- bufptr = dlfb_set_register(bufptr, j, vdata[j]);
-
- /* blank */
- bufptr = dlfb_set_register(bufptr, 0x1F, 0x00);
-
- /* end registers */
- bufptr = dlfb_set_register(bufptr, 0xFF, 0xFF);
-
- /* send */
- ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
- printk("ret bulk 2: %d %td\n", ret,
- bufptr - dev_info->buf);
-
- /* flush */
- ret = dlfb_bulk_msg(dev_info, 0);
- printk("ret bulk 3: %d\n", ret);
-
- dev_info->screen_size = width * height * (FB_BPP / 8);
- dev_info->line_length = width * (FB_BPP / 8);
-
- return 0;
- }
- }
-
- return -1;
-}
+#define dlfb_set_register insert_command
#endif
projects / platform / kernel / kernel-mfld-blackbay.git / commitdiff