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nuttx-apps/graphics/ft80x/ft80x_dl.c

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/****************************************************************************
* apps/graphics/ft80x/ft80x_dl.c
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <unistd.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <nuttx/lcd/ft80x.h>
#include "graphics/ft80x.h"
#include "ft80x.h"
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: ft80x_dl_dump
*
* Description:
* Dump the content of the display list to stdout as it is written from
* the local display buffer to hardware.
*
* Input Parameters:
* buffer - An instance of struct ft80x_dlbuffer_s allocated by the caller.
* data - Data being written.
* len - Number of bytes being written
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_GRAPHICS_FT80X_DEBUG_INFO
static void ft80x_dl_dump(FAR struct ft80x_dlbuffer_s *buffer,
FAR const void *data, size_t len)
{
size_t nwords;
int max;
int i;
int j;
printf("Writing display list:\n");
printf(" buffer: dlsize=%lu dloffset=%lu coproc=%u\n",
(unsigned long)buffer->dlsize, (unsigned long)buffer->dloffset,
buffer->coproc);
printf(" write: data=%p length=%lu\n",
data, (unsigned long)len);
nwords = len >> 2;
for (i = 0; i < nwords; i += 8)
{
printf(" %04x: ", i << 2);
max = i + 4;
if (max >= nwords)
{
max = nwords - i;
}
for (j = i; j < max; j++)
{
printf(" %08x", buffer->dlbuffer[j]);
}
putchar(' ');
max = i + 8;
if (i + max >= nwords)
{
max = nwords - i;
}
for (j = i + 4; j < max; j++)
{
printf(" %08x", buffer->dlbuffer[j]);
}
putchar('\n');
}
}
#else
# define ft80x_dl_dump(b,d,l)
#endif
/****************************************************************************
* Name: ft80x_dl_append
*
* Description:
* Append the display list data to the appropriate memory region.
*
* Input Parameters:
* fd - The file descriptor of the FT80x device. Opened by the caller
* with write access.
* buffer - An instance of struct ft80x_dlbuffer_s allocated by the caller.
* data - A pointer to the start of the data to be written.
* len - The number of bytes to be written.
*
* Returned Value:
* None
*
****************************************************************************/
static int ft80x_dl_append(int fd, FAR struct ft80x_dlbuffer_s *buffer,
FAR const void *data, size_t len)
{
int ret;
ft80x_dl_dump(buffer, data, len);
if (buffer->coproc)
{
/* Append data to RAM CMD */
ret = ft80x_ramcmd_append(fd, buffer, data, len);
}
else
{
/* Append data to RAM DL */
ret = ft80x_ramdl_append(fd, buffer, data, len);
}
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: ft80x_dl_start
*
* Description:
* Start a new display list. This function will:
*
* 1) Set the total display size to zero
* 2) Set the display list buffer offset to zero
* 3) Reposition the VFS so that subsequent writes will be to the
* beginning of the hardware display list.
* (Only for DL memory commands)
* 4) Write the CMD_DLSTART command into the local display list buffer
* (Only for co-processor commands)
*
* Input Parameters:
* fd - The file descriptor of the FT80x device. Opened by the caller
* with write access.
* buffer - An instance of struct ft80x_dlbuffer_s allocated by the caller.
* coproc - True: Use co-processor FIFO; false: Use DL memory.
*
* Returned Value:
* Zero (OK) on success. A negated errno value on failure.
*
****************************************************************************/
int ft80x_dl_start(int fd, FAR struct ft80x_dlbuffer_s *buffer, bool coproc)
{
struct ft80x_cmd_dlstart_s dlstart;
int ret;
ft80x_info("fd=%d buffer=%p\n", fd, buffer);
DEBUGASSERT(fd >= 0 && buffer != NULL);
/* 1) Set the total display size to zero
* 2) Set the display list buffer offset to zero
*/
buffer->coproc = coproc;
buffer->dlsize = 0;
buffer->dloffset = 0;
buffer->hwoffset = 0;
if (!coproc)
{
/* 3) Reposition the VFS so that subsequent writes will be to the
* beginning of the hardware display list.
*/
ret = ft80x_ramdl_rewind(fd, buffer);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_ramdl_rewind failed: %d\n", ret);
}
}
else
{
/* Get the initial RAM CMD FIFO offset */
ret = ft80x_getreg16(fd, FT80X_REG_CMD_READ, &buffer->hwoffset);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_getreg16 failed: %d\n", ret);
}
else
{
/* 4) Write the CMD_DLSTART command into the local display list
* buffer. (Only for co-processor commands)
*/
dlstart.cmd = FT80X_CMD_DLSTART;
ret = ft80x_dl_data(fd, buffer, &dlstart,
sizeof(struct ft80x_cmd_dlstart_s));
if (ret < 0)
{
ft80x_err("ERROR: ft80x_dl_data failed: %d\n", ret);
}
}
}
return ret;
}
/****************************************************************************
* Name: ft80x_dl_end
*
* Description:
* Terminate the display list. This function will:
*
* 1) Add the DISPLAY command to the local display list buffer to finish
* the last display
* 2) If using co-processor RAM CMD, add the CMD_SWAP to the DL command
* list
* 3) Flush the local display buffer to hardware and set the display list
* buffer offset to zero.
* 4) Swap to the newly created display list (DL memory case only).
* 5) For the case of the co-processor RAM CMD, it will also wait for the
* FIFO to be emptied.
*
* Input Parameters:
* fd - The file descriptor of the FT80x device. Opened by the caller
* with write access.
* buffer - An instance of struct ft80x_dlbuffer_s allocated by the caller.
*
* Returned Value:
* Zero (OK) on success. A negated errno value on failure.
*
****************************************************************************/
int ft80x_dl_end(int fd, FAR struct ft80x_dlbuffer_s *buffer)
{
struct
{
struct ft80x_dlcmd_s display;
struct ft80x_cmd32_s swap;
} s;
size_t size;
int ret;
ft80x_info("fd=%d buffer=%p\n", fd, buffer);
DEBUGASSERT(fd >= 0 && buffer != NULL);
/* 1) Add the DISPLAY command to the local display list buffer to finish
* the last display
*/
s.display.cmd = FT80X_DISPLAY();
size = sizeof(struct ft80x_dlcmd_s);
/* 2) If using co-processor RAM CMD, add the CMD_SWAP to the DL command
* list
*/
if (buffer->coproc)
{
s.swap.cmd = FT80X_CMD_SWAP;
size = sizeof(s);
};
ret = ft80x_dl_data(fd, buffer, &s, size);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_dl_data failed: %d\n", ret);
return ret;
}
/* 3) Flush the local display buffer to hardware and set the display list
* buffer offset to zero.
*/
ret = ft80x_dl_flush(fd, buffer);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_dl_flush failed: %d\n", ret);
}
/* 4) Swap to the newly created display list (DL memory case only). */
if (!buffer->coproc)
{
ret = ft80x_dl_swap(fd);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_dl_swap failed: %d\n", ret);
return ret;
}
}
/* 5) For the case of the co-processor RAM CMD, it will also wait for the
* FIFO to be emptied.
*/
if (buffer->coproc)
{
ret = ft80x_ramcmd_waitfifoempty(fd, buffer);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_ramcmd_waitfifoempty failed: %d\n", ret);
return ret;
}
}
return ret;
}
/****************************************************************************
* Name: ft80x_dl_data
*
* Description:
* Add data to the display list and increment the display list buffer
* offset. If the data will not fit into the local display buffer, then
* the local display buffer will first be flushed to hardware in order to
* free up space.
*
* Input Parameters:
* fd - The file descriptor of the FT80x device. Opened by the caller
* with write access.
* buffer - An instance of struct ft80x_dlbuffer_s allocated by the caller.
* data - The data to be added to the display list
* datlen - The length of the data to be added to the display list. If
* this is not an even multiple of 4 bytes, then the actual length
* will be padded with zero bytes to achieve alignment.
*
* Returned Value:
* Zero (OK) on success. A negated errno value on failure.
*
****************************************************************************/
int ft80x_dl_data(int fd, FAR struct ft80x_dlbuffer_s *buffer,
FAR const void *data, size_t datlen)
{
FAR uint8_t *bufptr;
size_t padlen;
int ret;
ft80x_info("fd=%d buffer=%p data=%p datlen=%u\n", fd, buffer, data, datlen);
DEBUGASSERT(fd >= 0 && buffer != NULL && data != NULL && datlen > 0);
if (datlen > 0)
{
/* This is the length of the data after alignment */
padlen = (datlen + 3) & ~3;
if (padlen != datlen)
{
ft80x_warn("WARNING: Length padded to %u->%u\n", datlen, padlen);
}
/* Is there enough space in the local display list buffer to hold the
* new data?
*/
if ((size_t)buffer->dloffset + padlen > FT80X_DL_BUFSIZE)
{
/* No... flush the local buffer */
ret = ft80x_dl_flush(fd, buffer);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_dl_flush failed: %d\n", ret);
return ret;
}
}
/* Special case: The new data won't fit into our local display list
* buffer. Here we can assume the flush above occurred. We can then
* work around by writing directly, unbuffered from the caller's
* buffer.
*/
if (padlen > FT80X_DL_BUFSIZE)
{
size_t writelen;
/* Write the aligned portion of the data directly to the FT80x
* hardware display list.
*/
writelen = datlen & ~3;
ret = ft80x_dl_append(fd, buffer, data, writelen);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_dl_append failed: %d\n", ret);
return ret;
}
buffer->dlsize += writelen;
/* Is there any unaligned remainder? If the original data length
* was aligned, then we should have writelen == datlen == padlen.
* If it the length was unaligned, then we should have writelen <
* datlen < padlen
*/
if (writelen < datlen)
{
/* Yes... we will handle the unaligned bytes below. */
data = (FAR void *)((uintptr_t)data + writelen);
datlen -= writelen;
padlen -= writelen;
}
else
{
/* No.. then we are finished */
return OK;
}
}
/* Copy the data into the local display list buffer */
bufptr = (FAR uint8_t *)buffer->dlbuffer;
bufptr += buffer->dloffset;
memcpy(bufptr, data, datlen);
bufptr += datlen;
buffer->dloffset += datlen;
/* Then append zero bytes as necessary to achieve alignment */
while (datlen < padlen)
{
*bufptr++ = 0;
buffer->dloffset++;
datlen++;
}
buffer->dlsize += padlen;
}
return OK;
}
/****************************************************************************
* Name: ft80x_dl_string
*
* Description:
* Add the string along with its NUL terminator to the display list and
* increment the display list buffer offset. If the length of the string
* with its NUL terminator is not an even multiple of 4 bytes, then the
* actual length will be padded with zero bytes to achieve alignment.
*
* If the data will not fit into the local display buffer, then the local
* display buffer will first be flushed to hardware in order to free up
* space.
*
* Input Parameters:
* fd - The file descriptor of the FT80x device. Opened by the caller
* with write access.
* buffer - An instance of struct ft80x_dlbuffer_s allocated by the caller.
* str - The string to be added to the display list. If NUL, then a
* NUL string will be added to the display list.
*
* Returned Value:
* Zero (OK) on success. A negated errno value on failure.
*
****************************************************************************/
int ft80x_dl_string(int fd, FAR struct ft80x_dlbuffer_s *buffer,
FAR const char *str)
{
FAR uint8_t *bufptr;
int datlen;
int padlen;
int ret;
ft80x_info("fd=%d buffer=%p str=%p\n", fd, buffer, str);
DEBUGASSERT(fd >= 0 && buffer != NULL);
/* Get the length the the string (excluding the NUL terminator) */
if (str == NULL)
{
str = "";
datlen = 0;
}
else
{
datlen = strlen(str);
}
/* This is the length of the string after the NUL terminator is added and
* the length is aligned to 32-bit boundary alignment.
*/
padlen = (datlen + 4) & ~3;
if (padlen != (datlen + 1))
{
ft80x_warn("WARNING: Length padded to %u->%u\n", datlen, padlen);
}
/* Is there enough space in the local display list buffer to hold the new
* string?
*/
if ((size_t)buffer->dloffset + padlen > FT80X_DL_BUFSIZE)
{
/* No... flush the local buffer */
ret = ft80x_dl_flush(fd, buffer);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_dl_flush failed: %d\n", ret);
return ret;
}
}
/* Special case: The new string won't fit into our local display list
* buffer. Here we can assume the flush above occurred. We can then
* work around by writing directly, unbuffered from the caller's
* buffer.
*/
if (padlen > FT80X_DL_BUFSIZE)
{
size_t writelen;
/* Write the aligned portion of the string directly to the FT80x
* hardware display list.
*/
writelen = datlen & ~3;
ret = ft80x_dl_append(fd, buffer, str, writelen);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_dl_append failed: %d\n", ret);
return ret;
}
buffer->dlsize += writelen;
/* There should always be an unaligned remainder If the original
* string length was aligned, then we should have writelen == datlen <
* padlen. If it the length was unaligned, then we should have
* writelen < datlen < padlen
*/
DEBUGASSERT(writelen < padlen);
/* We will handle the unaligned remainder below. */
str = &str[writelen];
datlen -= writelen;
padlen -= writelen;
}
/* Copy the data into the local display list buffer */
bufptr = (FAR uint8_t *)buffer->dlbuffer;
bufptr += buffer->dloffset;
strcpy((FAR char *)bufptr, str);
/* NOTE: that strcpy will copy the NUL terminator too */
datlen++;
/* Update pointers/offsets */
bufptr += datlen;
buffer->dloffset += datlen;
/* Then append zero bytes as necessary to achieve alignment */
while (datlen < padlen)
{
*bufptr++ = 0;
buffer->dloffset++;
datlen++;
}
buffer->dlsize += padlen;
return OK;
}
/****************************************************************************
* Name: ft80x_dl_flush
*
* Description:
* Flush the current contents of the local local display list buffer to
* hardware and reset the local display list buffer offset to zero.
*
* Input Parameters:
* fd - The file descriptor of the FT80x device. Opened by the caller with
* write access.
* buffer - An instance of struct ft80x_dlbuffer_s allocated by the caller.
*
* Returned Value:
* Zero (OK) on success. A negated errno value on failure.
*
****************************************************************************/
int ft80x_dl_flush(int fd, FAR struct ft80x_dlbuffer_s *buffer)
{
int ret;
ft80x_info("fd=%d buffer=%p dloffset=%u\n", fd, buffer, buffer->dloffset);
DEBUGASSERT(fd >= 0 && buffer != NULL);
/* Write the content of the local display buffer to hardware. */
ret = ft80x_dl_append(fd, buffer, buffer->dlbuffer, buffer->dloffset);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_dl_append failed: %d\n", ret);
return ret;
}
buffer->dloffset = 0;
return OK;
}
/****************************************************************************
* Name: ft80x_dl_create
*
* Description:
* For simple display lists, this function combines all functionality into
* a single combined. This function does the following:
*
* 1) Calls ft80x_dl_dlstart() to initialize the display list.
* 2) Calls ft80x_dl_data() to transfer the simple display list
* 3) Calls ft80x_dl_end() to complete the display list
*
* Input Parameters:
* fd - The file descriptor of the FT80x device. Opened by the caller
* with write access.
* buffer - An instance of struct ft80x_dlbuffer_s allocated by the caller.
* data - Pointer to a uint32_t array containing the simple display list
* nwords - The number of 32-bit words in the array.
* coproc - True: Use co-processor FIFO; false: Use DL memory.
*
* Returned Value:
* Zero (OK) on success. A negated errno value on failure.
*
****************************************************************************/
int ft80x_dl_create(int fd, FAR struct ft80x_dlbuffer_s *buffer,
FAR const uint32_t *cmds, unsigned int nwords,
bool coproc)
{
int ret;
ft80x_info("fd=%d buffer=%p cmds=%p nwords=%u coproc=%u\n",
fd, buffer, cmds, nwords, coproc);
DEBUGASSERT(fd >= 0 && buffer != NULL && cmds != NULL && nwords > 0);
/* Create the hardware display list */
ret = ft80x_dl_start(fd, buffer, coproc);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_dl_start failed: %d\n", ret);
return ret;
}
/* Copy the rectangle data into the display list */
ret = ft80x_dl_data(fd, buffer, cmds, nwords << 2);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_dl_data failed: %d\n", ret);
return ret;
}
/* And terminate the display list */
ret = ft80x_dl_end(fd, buffer);
if (ret < 0)
{
ft80x_err("ERROR: ft80x_dl_end failed: %d\n", ret);
return ret;
}
return OK;
}
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