void fbtft_write_reg8_bus9(struct fbtft_par *par, int len, ...)
{
va_list args;
int i, ret;
int pad = 0;
u16 *buf = (u16 *)par->buf;
if (unlikely(par->debug & DEBUG_WRITE_REGISTER)) {
va_start(args, len);
for (i = 0; i < len; i++)
*(((u8 *)buf) + i) = (u8)va_arg(args, unsigned int);
va_end(args);
fbtft_par_dbg_hex(DEBUG_WRITE_REGISTER, par,
par->info->device, u8, buf, len, "%s: ", __func__);
}
static void write_reg8_bus8(struct fbtft_par *par, int len, ...)
{
va_list args;
int i, ret;
u8 *buf = par->buf;
va_start(args, len);
for (i = 0; i < len; i++)
*buf++ = (u8)va_arg(args, unsigned int);
va_end(args);
fbtft_par_dbg_hex(DEBUG_WRITE_REGISTER, par,
par->info->device, u8, par->buf, len, "%s: ", __func__);
ret = par->fbtftops.write(par, par->buf, len);
if (ret < 0) {
dev_err(par->info->device,
"%s: write() failed and returned %d\n", __func__, ret);
return;
}
}
/*
* Option to use direct gpio access to speed up display refresh
*
*/
static int fbtft_ili9327_write_gpio8_wr(struct fbtft_par *par, void *buf, size_t len)
{
u8 data;
static u8 prev_data = 0xff;
#ifdef BYPASS_GPIOLIB
unsigned int set = 0;
unsigned int reset = 0;
#else
int i;
#endif
fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,
"%s-OPTIMIZED(len=%d): ", __func__, len);
#ifdef BYPASS_GPIOLIB
while (len--) {
data = *(u8 *) buf;
if (data != prev_data)
{
/* Set data */
GPIOSET(par->gpio.db[0], (data&0x01));
GPIOSET(par->gpio.db[1], (data&0x02));
GPIOSET(par->gpio.db[2], (data&0x04));
GPIOSET(par->gpio.db[3], (data&0x08));
GPIOSET(par->gpio.db[4], (data&0x10));
GPIOSET(par->gpio.db[5], (data&0x20));
GPIOSET(par->gpio.db[6], (data&0x40));
GPIOSET(par->gpio.db[7], (data&0x80));
writel(set, __io_address(GPIO_BASE+0x1C));
writel(reset, __io_address(GPIO_BASE+0x28));
}
/* Pulse /WR low */
writel((1<<par->gpio.wr), __io_address(GPIO_BASE+0x28));
writel(0, __io_address(GPIO_BASE+0x28)); /* used as a delay */
writel((1<<par->gpio.wr), __io_address(GPIO_BASE+0x1C));
set = 0;
reset = 0;
prev_data = data;
buf++;
}
#else
while (len--) {
data = *(u8 *) buf;
/* Start writing by pulling down /WR */
gpio_set_value(par->gpio.wr, 0);
/* Set data */
#ifndef DO_NOT_OPTIMIZE_FBTFT_WRITE_GPIO
if (data == prev_data) {
gpio_set_value(par->gpio.wr, 0); /* used as delay */
} else {
for (i = 0; i < 8; i++) {
if ((data & 1) != (prev_data & 1))
gpio_set_value(par->gpio.db[i],
data & 1);
data >>= 1;
prev_data >>= 1;
}
}
#else
for (i = 0; i < 8; i++) {
gpio_set_value(par->gpio.db[i], data & 1);
data >>= 1;
}
#endif
/* Pullup /WR */
gpio_set_value(par->gpio.wr, 1);
#ifndef DO_NOT_OPTIMIZE_FBTFT_WRITE_GPIO
prev_data = *(u8 *) buf;
#endif
buf++;
}
#endif
return 0;
}
