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|
/*
* Copyright (C) 2012-2015 Red Hat Inc.
*
* Based in parts on the udl code. Based in parts on the gm12u320 fb driver:
* Copyright (C) 2013 Viacheslav Nurmekhamitov <slavrn@yandex.ru>
* Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
* Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
* Copyright (C) 2009 Bernie Thompson <bernie@plugable.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.
*/
#include <drm/drmP.h>
#include "gm12u320_drv.h"
#define DATA_RCV_EPT 2
#define DATA_SND_EPT 3
#define DATA_BLOCK_HEADER_SIZE 84
#define DATA_BLOCK_CONTENT_SIZE 64512
#define DATA_BLOCK_FOOTER_SIZE 20
#define DATA_BLOCK_SIZE DATA_BLOCK_HEADER_SIZE + \
DATA_BLOCK_CONTENT_SIZE + \
DATA_BLOCK_FOOTER_SIZE
#define DATA_LAST_BLOCK_CONTENT_SIZE 4032
#define DATA_LAST_BLOCK_SIZE DATA_BLOCK_HEADER_SIZE + \
DATA_LAST_BLOCK_CONTENT_SIZE + \
DATA_BLOCK_FOOTER_SIZE
#define CMD_SIZE 31
#define READ_BLOCK_SIZE 13
#define CMD_TIMEOUT msecs_to_jiffies(200)
#define DATA_TIMEOUT msecs_to_jiffies(1000)
#define IDLE_TIMEOUT msecs_to_jiffies(2000)
#define FIRST_FRAME_TIMEOUT msecs_to_jiffies(2000)
static const char cmd_data[CMD_SIZE] =
{0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00, 0x68, 0xfc, 0x00, 0x00,
0x00, 0x00, 0x10, 0xff, 0x00, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x80, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static const char cmd_draw[CMD_SIZE] =
{0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x10, 0xfe, 0x00, 0x00, 0x00, 0xc0, 0xd1, 0x05, 0x00, 0x40,
0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
static const char data_block_header[DATA_BLOCK_HEADER_SIZE] =
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x04, 0x15, 0x00, 0x00, 0xfc, 0x00, 0x00, 0x01, 0x00, 0x00, 0xdb };
static const char data_last_block_header[DATA_BLOCK_HEADER_SIZE] =
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x2a, 0x00, 0x20, 0x00, 0xc0, 0x0f, 0x00, 0x00, 0x01, 0x00, 0x00, 0xd7 };
static const char data_block_footer[DATA_BLOCK_FOOTER_SIZE] =
{ 0xfb, 0x14, 0x02, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x4f };
static const char bl_get_set_brightness[CMD_SIZE] =
{0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
0x80, 0x01, 0x10, 0xfd, 0x00, 0x00, 0x00, 0xc0, 0xff, 0x35, 0x00, 0x00,
0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
static int gm12u320_usb_alloc(struct gm12u320_device *gm12u320)
{
int i, k;
int block_size;
const char *header;
gm12u320->cmd_buf = kmalloc(CMD_SIZE, GFP_KERNEL);
if (!gm12u320->cmd_buf)
return -ENOMEM;
for (k = 0; k < GM12U320_FRAME_COUNT; k++) {
for (i = 0; i < GM12U320_BLOCK_COUNT; i++) {
if (i == GM12U320_BLOCK_COUNT - 1) {
block_size = DATA_LAST_BLOCK_SIZE;
header = data_last_block_header;
} else {
block_size = DATA_BLOCK_SIZE;
header = data_block_header;
}
gm12u320->data_buf[k][i] = kzalloc(block_size,
GFP_KERNEL);
if (!gm12u320->data_buf[k][i])
return -ENOMEM;
memcpy(gm12u320->data_buf[k][i], header,
DATA_BLOCK_HEADER_SIZE);
memcpy(gm12u320->data_buf[k][i] +
(block_size - DATA_BLOCK_FOOTER_SIZE),
data_block_footer, DATA_BLOCK_FOOTER_SIZE);
}
}
return 0;
}
static void gm12u320_usb_free(struct gm12u320_device *gm12u320)
{
int i, k;
for (k = 0; k < GM12U320_FRAME_COUNT; k++)
for (i = 0; i < GM12U320_BLOCK_COUNT; i++)
kfree(gm12u320->data_buf[k][i]);
kfree(gm12u320->cmd_buf);
}
void gm12u320_32bpp_to_24bpp_packed(u8 *dst, u8 *src, int len)
{
while (len--) {
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
src++;
}
}
void gm12u320_update_frame(struct gm12u320_framebuffer *fb)
{
struct drm_device *dev = fb->base.dev;
struct gm12u320_device *gm12u320 = dev->dev_private;
int block, dst_offset, frame, len, remain, ret;
unsigned long flags;
u8 *src;
int x1 = 0;
int x2 = GM12U320_USER_WIDTH;
int y1 = 0;
int y2 = GM12U320_HEIGHT;
if (!fb->obj->vmapping) {
ret = gm12u320_gem_vmap(fb->obj);
if (ret == -ENOMEM) {
DRM_ERROR("failed to vmap fb\n");
return;
}
if (!fb->obj->vmapping) {
DRM_ERROR("failed to vmapping\n");
return;
}
}
spin_lock_irqsave(&gm12u320->frame_lock, flags);
frame = !gm12u320->current_frame;
spin_unlock_irqrestore(&gm12u320->frame_lock, flags);
x1 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;
x2 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;
src = fb->obj->vmapping;
for (; y1 < y2; y1++) {
remain = 0;
len = (x2 - x1) * 3;
dst_offset = (y1 * GM12U320_REAL_WIDTH + x1) * 3;
block = dst_offset / DATA_BLOCK_CONTENT_SIZE;
dst_offset %= DATA_BLOCK_CONTENT_SIZE;
if ((dst_offset + len) > DATA_BLOCK_CONTENT_SIZE) {
remain = dst_offset + len - DATA_BLOCK_CONTENT_SIZE;
len = DATA_BLOCK_CONTENT_SIZE - dst_offset;
}
dst_offset += DATA_BLOCK_HEADER_SIZE;
len /= 3;
gm12u320_32bpp_to_24bpp_packed(
gm12u320->data_buf[frame][block] + dst_offset,
src, len);
if (remain) {
block++;
dst_offset = DATA_BLOCK_HEADER_SIZE;
gm12u320_32bpp_to_24bpp_packed(
gm12u320->data_buf[frame][block] + dst_offset,
src + len * 4, remain / 3);
}
src += fb->base.pitches[0];
}
spin_lock_irqsave(&gm12u320->frame_lock, flags);
gm12u320->next_frame = frame;
spin_unlock_irqrestore(&gm12u320->frame_lock, flags);
wake_up(&gm12u320->frame_waitq);
}
static int gm12u320_frame_ready(struct gm12u320_device *gm12u320)
{
int ret;
spin_lock(&gm12u320->frame_lock);
ret = gm12u320->next_frame != gm12u320->current_frame;
spin_unlock(&gm12u320->frame_lock);
return ret;
}
static void gm12u320_frame_work(struct work_struct *work)
{
struct gm12u320_device *gm12u320 =
container_of(work, struct gm12u320_device, frame_work);
int draw_status_timeout = FIRST_FRAME_TIMEOUT;
int block, block_size, frame, len, ret;
while (1) {
/*
* We must draw a frame every 2s otherwise the projector
* switches back to showing its logo.
*/
wait_event_timeout(gm12u320->frame_waitq,
gm12u320_frame_ready(gm12u320),
IDLE_TIMEOUT);
spin_lock(&gm12u320->frame_lock);
frame = gm12u320->current_frame = gm12u320->next_frame;
spin_unlock(&gm12u320->frame_lock);
for (block = 0; block < GM12U320_BLOCK_COUNT; block++) {
if (block == GM12U320_BLOCK_COUNT - 1)
block_size = DATA_LAST_BLOCK_SIZE;
else
block_size = DATA_BLOCK_SIZE;
/* Send data command to device */
memcpy(gm12u320->cmd_buf, cmd_data, CMD_SIZE);
gm12u320->cmd_buf[8] = block_size & 0xff;
gm12u320->cmd_buf[9] = block_size >> 8;
gm12u320->cmd_buf[20] = 0xfc - block * 4;
gm12u320->cmd_buf[21] = block | (frame << 7);
ret = usb_bulk_msg(gm12u320->udev,
usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT),
gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT);
if (ret || len != CMD_SIZE)
goto err;
/* Send data block to device */
ret = usb_bulk_msg(gm12u320->udev,
usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT),
gm12u320->data_buf[frame][block], block_size,
&len, DATA_TIMEOUT);
if (ret || len != block_size)
goto err;
/* Read status */
ret = usb_bulk_msg(gm12u320->udev,
usb_rcvbulkpipe(gm12u320->udev, DATA_RCV_EPT),
gm12u320->cmd_buf, READ_BLOCK_SIZE, &len,
CMD_TIMEOUT);
if (ret || len != READ_BLOCK_SIZE)
goto err;
}
/* Send draw command to device */
memcpy(gm12u320->cmd_buf, cmd_draw, CMD_SIZE);
ret = usb_bulk_msg(gm12u320->udev,
usb_sndbulkpipe(gm12u320->udev, DATA_SND_EPT),
gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT);
if (ret || len != CMD_SIZE)
goto err;
/* Read status */
ret = usb_bulk_msg(gm12u320->udev,
usb_rcvbulkpipe(gm12u320->udev, DATA_RCV_EPT),
gm12u320->cmd_buf, READ_BLOCK_SIZE, &len,
draw_status_timeout);
if (ret || len != READ_BLOCK_SIZE)
goto err;
draw_status_timeout = CMD_TIMEOUT;
}
err:
/* Do not log errors caused by module unload or device unplug */
if (ret != -ENOENT && ret != -ECONNRESET && ret != -ESHUTDOWN &&
ret != -ENODEV)
dev_err(&gm12u320->udev->dev, "Frame update error: %d\n", ret);
}
int gm12u320_driver_load(struct drm_device *dev, unsigned long flags)
{
struct usb_device *udev = (void*)flags;
struct gm12u320_device *gm12u320;
int ret = -ENOMEM;
DRM_DEBUG("\n");
gm12u320 = kzalloc(sizeof(struct gm12u320_device), GFP_KERNEL);
if (!gm12u320)
return -ENOMEM;
gm12u320->udev = udev;
gm12u320->ddev = dev;
dev->dev_private = gm12u320;
INIT_WORK(&gm12u320->frame_work, gm12u320_frame_work);
spin_lock_init(&gm12u320->frame_lock);
init_waitqueue_head(&gm12u320->frame_waitq);
/*
* These are deliberately different so that we send out an empty
* screen to replace the projector logo immediately.
*/
gm12u320->current_frame = 1;
gm12u320->next_frame = 0;
ret = gm12u320_usb_alloc(gm12u320);
if (ret)
goto err;
gm12u320->frame_workq = create_singlethread_workqueue(DRIVER_NAME);
if (!gm12u320->frame_workq) {
ret = -ENOMEM;
goto err;
}
DRM_DEBUG("\n");
ret = gm12u320_modeset_init(dev);
if (ret)
goto err;
ret = gm12u320_fbdev_init(dev);
if (ret)
goto err;
ret = drm_vblank_init(dev, 1);
if (ret)
goto err_fb;
queue_work(gm12u320->frame_workq, &gm12u320->frame_work);
return 0;
err_fb:
gm12u320_fbdev_cleanup(dev);
err:
gm12u320_usb_free(gm12u320);
kfree(gm12u320);
DRM_ERROR("%d\n", ret);
return ret;
}
int gm12u320_driver_unload(struct drm_device *dev)
{
struct gm12u320_device *gm12u320 = dev->dev_private;
/* Wake up frame_work, so that it sees the disconnect and exits */
wake_up(&gm12u320->frame_waitq);
cancel_work_sync(&gm12u320->frame_work);
destroy_workqueue(gm12u320->frame_workq);
gm12u320_usb_free(gm12u320);
drm_vblank_cleanup(dev);
gm12u320_fbdev_cleanup(dev);
gm12u320_modeset_cleanup(dev);
kfree(gm12u320);
return 0;
}
|
