397 lines
11 KiB
C
397 lines
11 KiB
C
/****************************************************************************
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* apps/graphics/ft80x/ft80x_regs.c
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <assert.h>
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#include <errno.h>
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#include <nuttx/lcd/ft80x.h>
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#include "ft80x.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Sleep for 10 MS between each REG_DLSWAP poll */
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#define DLSWAP_DELAY_USEC (10 * 1000)
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/* But timeout after 5 seconds ( 5 * 100 * 10 MS = 5 S) */
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#define DLSWAP_TIMEOUT_CSEC (5 * 100)
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ft80x_getreg8/16/32
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*
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* Description:
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* Read an 8-, 16-, or 32-bit FT80x register value.
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*
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* Input Parameters:
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* fd - The file descriptor of the FT80x device. Opened by the caller
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* with write access.
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* addr - The 32-bit aligned, 22-bit register address
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* value - The location to return the register value
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*
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* Returned Value:
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* Zero (OK) on success. A negated errno value on failure.
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*
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****************************************************************************/
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int ft80x_getreg8(int fd, uint32_t addr, FAR uint8_t *value)
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{
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struct ft80x_register_s reg;
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int ret;
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DEBUGASSERT(value != NULL && (addr & 3) == 0 && addr < 0xffc00000);
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/* Perform the IOCTL to get the register value */
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reg.addr = addr;
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ret = ioctl(fd, FT80X_IOC_GETREG8, (unsigned long)((uintptr_t)®));
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if (ret < 0)
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{
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int errcode = errno;
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ft80x_err("ERROR: ioctl(FT80X_IOC_GETREG8) failed: %d\n", errcode);
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ret = -errcode;
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}
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else
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{
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*value = reg.value.u8;
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}
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return ret;
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}
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int ft80x_getreg16(int fd, uint32_t addr, FAR uint16_t *value)
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{
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struct ft80x_register_s reg;
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int ret;
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DEBUGASSERT(value != NULL && (addr & 3) == 0 && addr < 0xffc00000);
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/* Perform the IOCTL to get the register value */
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reg.addr = addr;
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ret = ioctl(fd, FT80X_IOC_GETREG16, (unsigned long)((uintptr_t)®));
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if (ret < 0)
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{
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int errcode = errno;
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ft80x_err("ERROR: ioctl(FT80X_IOC_GETREG16) failed: %d\n", errcode);
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ret = -errcode;
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}
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else
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{
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*value = reg.value.u16;
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}
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return ret;
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}
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int ft80x_getreg32(int fd, uint32_t addr, FAR uint32_t *value)
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{
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struct ft80x_register_s reg;
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int ret;
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DEBUGASSERT(value != NULL && (addr & 3) == 0 && addr < 0xffc00000);
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/* Perform the IOCTL to get the register value */
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reg.addr = addr;
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ret = ioctl(fd, FT80X_IOC_GETREG32, (unsigned long)((uintptr_t)®));
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if (ret < 0)
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{
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int errcode = errno;
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ft80x_err("ERROR: ioctl(FT80X_IOC_GETREG32) failed: %d\n", errcode);
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ret = -errcode;
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}
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else
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{
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*value = reg.value.u32;
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}
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return ret;
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}
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/****************************************************************************
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* Name: ft80x_getregs
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*
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* Description:
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* Read multiple 32-bit FT80x register values.
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*
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* Input Parameters:
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* fd - The file descriptor of the FT80x device. Opened by the caller
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* with write access.
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* addr - The 32-bit aligned, 22-bit start register address
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* nregs - The number of registers to read.
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* value - The location to return the register values
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*
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* Returned Value:
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* Zero (OK) on success. A negated errno value on failure.
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*
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****************************************************************************/
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int ft80x_getregs(int fd, uint32_t addr, uint8_t nregs, FAR uint32_t *value)
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{
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struct ft80x_registers_s regs;
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int ret;
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DEBUGASSERT(value != NULL && (addr & 3) == 0 && addr < 0xffc00000);
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/* Perform the IOCTL to get the register value */
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regs.addr = addr;
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regs.nregs = nregs;
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regs.value = value;
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ret = ioctl(fd, FT80X_IOC_GETREGS, (unsigned long)((uintptr_t)®s));
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if (ret < 0)
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{
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int errcode = errno;
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ft80x_err("ERROR: ioctl(FT80X_IOC_GETREGS) failed: %d\n", errcode);
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ret = -errcode;
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}
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return ret;
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}
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/****************************************************************************
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* Name: ft80x_putreg8/16/32
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*
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* Description:
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* Wtite an 8-, 16-, or 32-bit FT80x register value.
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*
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* Input Parameters:
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* fd - The file descriptor of the FT80x device. Opened by the caller
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* with write access.
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* addr - The 32-bit aligned, 22-bit register address
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* value - The register value to write.
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*
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* Returned Value:
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* Zero (OK) on success. A negated errno value on failure.
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*
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****************************************************************************/
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int ft80x_putreg8(int fd, uint32_t addr, uint8_t value)
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{
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struct ft80x_register_s reg;
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int ret;
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DEBUGASSERT(value != NULL && (addr & 3) == 0 && addr < 0xffc00000);
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/* Perform the IOCTL to get the register value */
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reg.addr = addr;
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reg.value.u8 = value;
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ret = ioctl(fd, FT80X_IOC_PUTREG8, (unsigned long)((uintptr_t)®));
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if (ret < 0)
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{
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int errcode = errno;
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ft80x_err("ERROR: ioctl(FT80X_IOC_PUTREG8) failed: %d\n", errcode);
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ret = -errcode;
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}
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return ret;
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}
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int ft80x_putreg16(int fd, uint32_t addr, uint16_t value)
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{
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struct ft80x_register_s reg;
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int ret;
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DEBUGASSERT(value != NULL && (addr & 3) == 0 && addr < 0xffc00000);
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/* Perform the IOCTL to get the register value */
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reg.addr = addr;
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reg.value.u16 = value;
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ret = ioctl(fd, FT80X_IOC_PUTREG16, (unsigned long)((uintptr_t)®));
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if (ret < 0)
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{
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int errcode = errno;
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ft80x_err("ERROR: ioctl(FT80X_IOC_PUTREG16) failed: %d\n", errcode);
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ret = -errcode;
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}
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return ret;
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}
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int ft80x_putreg32(int fd, uint32_t addr, uint32_t value)
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{
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struct ft80x_register_s reg;
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int ret;
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DEBUGASSERT(value != NULL && (addr & 3) == 0 && addr < 0xffc00000);
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/* Perform the IOCTL to get the register value */
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reg.addr = addr;
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reg.value.u32 = value;
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ret = ioctl(fd, FT80X_IOC_PUTREG32, (unsigned long)((uintptr_t)®));
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if (ret < 0)
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{
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int errcode = errno;
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ft80x_err("ERROR: ioctl(FT80X_IOC_PUTREG32) failed: %d\n", errcode);
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ret = -errcode;
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}
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return ret;
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}
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/****************************************************************************
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* Name: ft80x_putregs
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*
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* Description:
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* Write multiple 32-bit FT80x register values.
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*
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* Input Parameters:
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* fd - The file descriptor of the FT80x device. Opened by the caller
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* with write access.
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* addr - The 32-bit aligned, 22-bit start register address
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* nregs - The number of registers to write.
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* value - The of the register values to be written.
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*
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* Returned Value:
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* Zero (OK) on success. A negated errno value on failure.
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*
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****************************************************************************/
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int ft80x_putregs(int fd, uint32_t addr, uint8_t nregs,
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FAR const uint32_t *value)
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{
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struct ft80x_registers_s regs;
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int ret;
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DEBUGASSERT(value != NULL && (addr & 3) == 0 && addr < 0xffc00000);
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/* Perform the IOCTL to get the register value */
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regs.addr = addr;
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regs.nregs = nregs;
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regs.value = (FAR uint32_t *)value; /* Discard const qualifier */
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ret = ioctl(fd, FT80X_IOC_PUTREGS, (unsigned long)((uintptr_t)®s));
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if (ret < 0)
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{
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int errcode = errno;
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ft80x_err("ERROR: ioctl(FT80X_IOC_PUTREGS) failed: %d\n", errcode);
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ret = -errcode;
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}
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return ret;
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}
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/****************************************************************************
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* Name: ft80x_dl_swap
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*
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* Description:
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* Perform the display swap operation.
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*
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* Input Parameters:
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* fd - The file descriptor of the FT80x device. Opened by the caller
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* with write access.
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*
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* Returned Value:
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* Zero (OK) on success. A negated errno value on failure.
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*
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****************************************************************************/
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int ft80x_dl_swap(int fd)
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{
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unsigned int timeout;
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uint8_t regval8;
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int ret;
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/* Perform the DL swap */
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ret = ft80x_putreg8(fd, FT80X_REG_DLSWAP, DLSWAP_FRAME);
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if (ret < 0)
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{
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ft80x_err("ERROR: ft80x_putreg8 failed: %d\n", ret);
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return ret;
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}
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/* Now wait for the swap to complete */
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timeout = 0;
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for (; ; )
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{
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/* Read REG_DLSWAP again */
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ret = ft80x_getreg8(fd, FT80X_REG_DLSWAP, ®val8);
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if (ret < 0)
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{
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ft80x_err("ERROR: ft80x_putreg8 failed: %d\n", ret);
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return ret;
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}
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/* Check if the swap is complete */
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if (regval8 == DLSWAP_DONE)
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{
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return OK;
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}
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if (++timeout > DLSWAP_TIMEOUT_CSEC)
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{
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ft80x_warn("WARNING: Timed out waiting for DLSWAP to complete\n");
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return -ETIMEDOUT;
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}
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/* No.. Wait a bit and try again */
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usleep(DLSWAP_DELAY_USEC);
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}
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}
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