/**************************************************************************** * apps/graphics/ft80x/ft80x_regs.c * * Copyright (C) 2018 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 #include #include #include #include #include #include #include #include "ft80x.h" /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Sleep for 10 MS between each REG_DLSWAP poll */ #define DLSWAP_DELAY_USEC (10 * 1000) /* But timeout after 5 seconds ( 5 * 100 * 10 MS = 5 S) */ #define DLSWAP_TIMEOUT_CSEC (5 * 100) /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: ft80x_getreg8/16/32 * * Description: * Read an 8-, 16-, or 32-bit FT80x register value. * * Input Parameters: * fd - The file descriptor of the FT80x device. Opened by the caller * with write access. * addr - The 32-bit aligned, 22-bit register address * value - The location to return the register value * * Returned Value: * Zero (OK) on success. A negated errno value on failure. * ****************************************************************************/ int ft80x_getreg8(int fd, uint32_t addr, FAR uint8_t *value) { struct ft80x_register_s reg; int ret; DEBUGASSERT(value != NULL && (addr & 3) == 0 && addr < 0xffc00000); /* Perform the IOCTL to get the register value */ reg.addr = addr; ret = ioctl(fd, FT80X_IOC_GETREG8, (unsigned long)((uintptr_t)®)); if (ret < 0) { int errcode = errno; ft80x_err("ERROR: ioctl(FT80X_IOC_GETREG8) failed: %d\n", errcode); ret = -errcode; } else { *value = reg.value.u8; } return ret; } int ft80x_getreg16(int fd, uint32_t addr, FAR uint16_t *value) { struct ft80x_register_s reg; int ret; DEBUGASSERT(value != NULL && (addr & 3) == 0 && addr < 0xffc00000); /* Perform the IOCTL to get the register value */ reg.addr = addr; ret = ioctl(fd, FT80X_IOC_GETREG16, (unsigned long)((uintptr_t)®)); if (ret < 0) { int errcode = errno; ft80x_err("ERROR: ioctl(FT80X_IOC_GETREG16) failed: %d\n", errcode); ret = -errcode; } else { *value = reg.value.u16; } return ret; } int ft80x_getreg32(int fd, uint32_t addr, FAR uint32_t *value) { struct ft80x_register_s reg; int ret; DEBUGASSERT(value != NULL && (addr & 3) == 0 && addr < 0xffc00000); /* Perform the IOCTL to get the register value */ reg.addr = addr; ret = ioctl(fd, FT80X_IOC_GETREG32, (unsigned long)((uintptr_t)®)); if (ret < 0) { int errcode = errno; ft80x_err("ERROR: ioctl(FT80X_IOC_GETREG32) failed: %d\n", errcode); ret = -errcode; } else { *value = reg.value.u32; } return ret; } /**************************************************************************** * Name: ft80x_getregs * * Description: * Read multiple 32-bit FT80x register values. * * Input Parameters: * fd - The file descriptor of the FT80x device. Opened by the caller * with write access. * addr - The 32-bit aligned, 22-bit start register address * nregs - The number of registers to read. * value - The location to return the register values * * Returned Value: * Zero (OK) on success. A negated errno value on failure. * ****************************************************************************/ int ft80x_getregs(int fd, uint32_t addr, uint8_t nregs, FAR uint32_t *value) { struct ft80x_registers_s regs; int ret; DEBUGASSERT(value != NULL && (addr & 3) == 0 && addr < 0xffc00000); /* Perform the IOCTL to get the register value */ regs.addr = addr; regs.nregs = nregs; regs.value = value; ret = ioctl(fd, FT80X_IOC_GETREGS, (unsigned long)((uintptr_t)®s)); if (ret < 0) { int errcode = errno; ft80x_err("ERROR: ioctl(FT80X_IOC_GETREGS) failed: %d\n", errcode); ret = -errcode; } return ret; } /**************************************************************************** * Name: ft80x_putreg8/16/32 * * Description: * Wtite an 8-, 16-, or 32-bit FT80x register value. * * Input Parameters: * fd - The file descriptor of the FT80x device. Opened by the caller * with write access. * addr - The 32-bit aligned, 22-bit register address * value - The register value to write. * * Returned Value: * Zero (OK) on success. A negated errno value on failure. * ****************************************************************************/ int ft80x_putreg8(int fd, uint32_t addr, uint8_t value) { struct ft80x_register_s reg; int ret; DEBUGASSERT((addr & 3) == 0 && addr < 0xffc00000); /* Perform the IOCTL to get the register value */ reg.addr = addr; reg.value.u8 = value; ret = ioctl(fd, FT80X_IOC_PUTREG8, (unsigned long)((uintptr_t)®)); if (ret < 0) { int errcode = errno; ft80x_err("ERROR: ioctl(FT80X_IOC_PUTREG8) failed: %d\n", errcode); ret = -errcode; } return ret; } int ft80x_putreg16(int fd, uint32_t addr, uint16_t value) { struct ft80x_register_s reg; int ret; DEBUGASSERT((addr & 3) == 0 && addr < 0xffc00000); /* Perform the IOCTL to get the register value */ reg.addr = addr; reg.value.u16 = value; ret = ioctl(fd, FT80X_IOC_PUTREG16, (unsigned long)((uintptr_t)®)); if (ret < 0) { int errcode = errno; ft80x_err("ERROR: ioctl(FT80X_IOC_PUTREG16) failed: %d\n", errcode); ret = -errcode; } return ret; } int ft80x_putreg32(int fd, uint32_t addr, uint32_t value) { struct ft80x_register_s reg; int ret; DEBUGASSERT((addr & 3) == 0 && addr < 0xffc00000); /* Perform the IOCTL to get the register value */ reg.addr = addr; reg.value.u32 = value; ret = ioctl(fd, FT80X_IOC_PUTREG32, (unsigned long)((uintptr_t)®)); if (ret < 0) { int errcode = errno; ft80x_err("ERROR: ioctl(FT80X_IOC_PUTREG32) failed: %d\n", errcode); ret = -errcode; } return ret; } /**************************************************************************** * Name: ft80x_putregs * * Description: * Write multiple 32-bit FT80x register values. * * Input Parameters: * fd - The file descriptor of the FT80x device. Opened by the caller * with write access. * addr - The 32-bit aligned, 22-bit start register address * nregs - The number of registers to write. * value - The of the register values to be written. * * Returned Value: * Zero (OK) on success. A negated errno value on failure. * ****************************************************************************/ int ft80x_putregs(int fd, uint32_t addr, uint8_t nregs, FAR const uint32_t *value) { struct ft80x_registers_s regs; int ret; DEBUGASSERT(value != NULL && (addr & 3) == 0 && addr < 0xffc00000); /* Perform the IOCTL to get the register value */ regs.addr = addr; regs.nregs = nregs; regs.value = (FAR uint32_t *)value; /* Discard const qualifier */ ret = ioctl(fd, FT80X_IOC_PUTREGS, (unsigned long)((uintptr_t)®s)); if (ret < 0) { int errcode = errno; ft80x_err("ERROR: ioctl(FT80X_IOC_PUTREGS) failed: %d\n", errcode); ret = -errcode; } return ret; } /**************************************************************************** * Name: ft80x_dl_swap * * Description: * Perform the display swap operation. * * Input Parameters: * fd - The file descriptor of the FT80x device. Opened by the caller * with write access. * * Returned Value: * Zero (OK) on success. A negated errno value on failure. * ****************************************************************************/ int ft80x_dl_swap(int fd) { unsigned int timeout; uint8_t regval8; int ret; /* Perform the DL swap */ ret = ft80x_putreg8(fd, FT80X_REG_DLSWAP, DLSWAP_FRAME); if (ret < 0) { ft80x_err("ERROR: ft80x_putreg8 failed: %d\n", ret); return ret; } /* Now wait for the swap to complete */ timeout = 0; for (; ; ) { /* Read REG_DLSWAP again */ ret = ft80x_getreg8(fd, FT80X_REG_DLSWAP, ®val8); if (ret < 0) { ft80x_err("ERROR: ft80x_putreg8 failed: %d\n", ret); return ret; } /* Check if the swap is complete */ if (regval8 == DLSWAP_DONE) { return OK; } if (++timeout > DLSWAP_TIMEOUT_CSEC) { ft80x_warn("WARNING: Timed out waiting for DLSWAP to complete\n"); return -ETIMEDOUT; } /* No.. Wait a bit and try again */ usleep(DLSWAP_DELAY_USEC); } }