static int Revo51_GetDataBit(struct CardData *card, int ack)
{
int bit;
if (ack)
MicroDelay(5);
// get data bit from the GPIO pines
card->gpio_dir &= ~REVO51_I2C_DATA;
SetGPIODir(card->pci_dev, card, card->gpio_dir);
bit = GetGPIOData(card->pci_dev, card->iobase) & REVO51_I2C_DATA ? 1 : 0;
return bit;
}
// Write data to the SDA line and clock to the SCL
static void Revo51_Write_CLK_SDA(struct CardData *card, int clk, int data)
{
unsigned int val = 0, mask = REVO51_I2C_CLOCK | REVO51_I2C_DATA;;
if (clk)
val |= REVO51_I2C_CLOCK;
if (data)
val |= REVO51_I2C_DATA;
card->gpio_dir |= mask;
SetGPIODir(card->pci_dev, card, card->gpio_dir);
SetGPIOMask(card->pci_dev, card->iobase, ~mask);
SetGPIOData(card->pci_dev, card->iobase, mask & val);
MicroDelay(5);
}
// Set the direction of the CLK and SDA lines:
// For sending, use 1, 1
static void Revo51_SetDir_CLK_SDA(struct CardData *card, int clock, int data)
{
unsigned int mask = 0, val;
val = 0;
if (clock)
val = REVO51_I2C_CLOCK; /* write SCL */
if (data)
val |= REVO51_I2C_DATA; /* write SDA */
mask = REVO51_I2C_CLOCK | REVO51_I2C_DATA;
card->gpio_dir &= ~mask;
card->gpio_dir |= val;
SetGPIODir(card->pci_dev, card, card->gpio_dir);
SetGPIOMask(card->pci_dev, card->iobase, ~mask);
}
static void ak4396_write(struct CardData *card, unsigned int reg,
unsigned int data)
{
unsigned int block;
SaveGPIO(card->pci_dev, card);
SetGPIODir(card->pci_dev, card, AK4396_CSN|AK4396_CCLK|AK4396_CDTI);
SetGPIOMask(card->pci_dev, card->iobase, ~(AK4396_CSN|AK4396_CCLK|AK4396_CDTI));
/* latch must be low when writing */
SetGPIOBits(card, AK4396_CSN, 0);
block = ((AK4396_ADDR & 0x03) << 14) | (1 << 13) |
((reg & 0x1f) << 8) | (data & 0xff);
ak4396_write_word(card, block); /* REGISTER ADDRESS */
/* release latch */
SetGPIOBits(card, AK4396_CSN, 1);
MicroDelay(1);
/* restore */
RestoreGPIO(card->pci_dev, card);
}
static int __init
rs_cnxt_init(void)
{
int flags;
struct cnxt_serial *info;
/* Setup base handler, and timer table. */
init_bh(SERIAL_BH, do_serial_bh);
/* Initialize the tty_driver structure */
memset(&serial_driver, 0, sizeof(struct tty_driver));
serial_driver.magic = TTY_DRIVER_MAGIC;
serial_driver.name = "ttyS";
serial_driver.major = TTY_MAJOR;
serial_driver.minor_start = 64;
serial_driver.num = 1;
serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
serial_driver.subtype = SERIAL_TYPE_NORMAL;
serial_driver.init_termios = tty_std_termios;
serial_driver.init_termios.c_cflag =
B57600 | CS8 | CREAD | HUPCL | CLOCAL;
serial_driver.flags = TTY_DRIVER_REAL_RAW;
serial_driver.refcount = &serial_refcount;
serial_driver.table = serial_table;
serial_driver.termios = serial_termios;
serial_driver.termios_locked = serial_termios_locked;
serial_driver.open = rs_open;
serial_driver.close = rs_close;
serial_driver.write = rs_write;
serial_driver.put_char = rs_put_char;
serial_driver.flush_chars = rs_flush_chars;
serial_driver.write_room = rs_write_room;
serial_driver.chars_in_buffer = rs_chars_in_buffer;
serial_driver.flush_buffer = rs_flush_buffer;
serial_driver.ioctl = rs_ioctl;
serial_driver.throttle = rs_throttle;
serial_driver.unthrottle = rs_unthrottle;
serial_driver.set_termios = rs_set_termios;
serial_driver.stop = rs_stop;
serial_driver.start = rs_start;
serial_driver.hangup = rs_hangup;
serial_driver.set_ldisc = rs_set_ldisc;
/*
* The callout device is just like normal device except for
* major number and the subtype code.
*/
callout_driver = serial_driver;
callout_driver.name = "cua";
callout_driver.major = TTYAUX_MAJOR;
callout_driver.subtype = SERIAL_TYPE_CALLOUT;
if (tty_register_driver(&serial_driver))
panic("Couldn't register serial driver\n");
if (tty_register_driver(&callout_driver))
panic("Couldn't register callout driver\n");
save_flags(flags); cli();
info = &uart_info;
info->magic = SERIAL_MAGIC;
info->uart = (struct uart_regs*)UART0_Base_Addr;
info->port = UART0_Base_Addr;
info->tty = 0;
info->irq = CNXT_INT_LVL_GPIO;
info->custom_divisor = 16;
info->close_delay = 50;
info->closing_wait = 3000;
info->x_char = 0;
info->event = 0;
info->count = 0;
info->blocked_open = 0;
info->tqueue.routine = do_softint;
info->tqueue.data = info;
info->tqueue_hangup.routine = do_serial_hangup;
info->tqueue_hangup.data = info;
info->callout_termios =callout_driver.init_termios;
info->normal_termios = serial_driver.init_termios;
init_waitqueue_head(&info->open_wait);
init_waitqueue_head(&info->close_wait);
info->line = 0;
info->is_cons = 1; /* Means shortcuts work */
printk("%s%d at 0x%08x (irq = %d)", serial_driver.name, info->line,
info->port, info->irq);
printk(" is a 16c550 UART\n");
printk("info = %08x\n",info);
#if DEBUG_CONSOLE_ON_UART_2
SetGPIOIntEnable( GPIO25, IRQ_OFF );
SetGPIOInputEnable( GPIO25, GP_INPUTOFF );
#endif
SetGPIOIntEnable(GPIOINT_UART1, IRQ_OFF);
SetGPIODir( GPIOINT_UART1, GP_INPUT );
SetGPIOIntPolarity (GPIOINT_UART1, GP_IRQ_POL_POSITIVE);
SetGPIOInputEnable( GPIOINT_UART1, GP_INPUTON );
GPIO_SetGPIOIRQRoutine(GPIOINT_UART1, GPIOB25_Handler);
SetGPIOIntEnable(GPIOINT_UART1, IRQ_ON);
restore_flags(flags);
return 0;
}
