/* initialize the hardware */
static void it8709_init_hardware(struct ite_dev *dev)
{
ite_dbg("%s called", __func__);
/* disable all the interrupts */
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
IT85_C0IER);
/* program the baud rate divisor */
it8709_wr(dev, ITE_BAUDRATE_DIVISOR & 0xff, IT85_C0BDLR);
it8709_wr(dev, (ITE_BAUDRATE_DIVISOR >> 8) & 0xff,
IT85_C0BDHR);
/* program the C0MSTCR register defaults */
it8709_wr(dev, (it8709_rr(dev, IT85_C0MSTCR) &
~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL
| IT85_FIFOCLR | IT85_RESET)) | IT85_FIFOTL_DEFAULT,
IT85_C0MSTCR);
/* program the C0RCR register defaults */
it8709_wr(dev, (it8709_rr(dev, IT85_C0RCR) &
~(IT85_RXEN | IT85_RDWOS | IT85_RXEND | IT85_RXACT
| IT85_RXDCR)) | ITE_RXDCR_DEFAULT,
IT85_C0RCR);
/* program the C0TCR register defaults */
it8709_wr(dev, (it8709_rr(dev, IT85_C0TCR) & ~(IT85_TXMPM | IT85_TXMPW))
| IT85_TXRLE | IT85_TXENDF | IT85_TXMPM_DEFAULT
| IT85_TXMPW_DEFAULT,
IT85_C0TCR);
/* program the carrier parameters */
ite_set_carrier_params(dev);
}
/* set the carrier parameters; to be called with the spinlock held */
static void it8709_set_carrier_params(struct ite_dev *dev, bool high_freq,
bool use_demodulator,
u8 carrier_freq_bits, u8 allowance_bits,
u8 pulse_width_bits)
{
u8 val;
ite_dbg("%s called", __func__);
val = (it8709_rr(dev, IT85_C0CFR)
&~(IT85_HCFS | IT85_CFQ)) |
carrier_freq_bits;
if (high_freq)
val |= IT85_HCFS;
it8709_wr(dev, val, IT85_C0CFR);
/* program the C0RCR register */
val = it8709_rr(dev, IT85_C0RCR)
& ~(IT85_RXEND | IT85_RXDCR);
if (use_demodulator)
val |= IT85_RXEND;
val |= allowance_bits;
it8709_wr(dev, val, IT85_C0RCR);
/* program the C0TCR register */
val = it8709_rr(dev, IT85_C0TCR) & ~IT85_TXMPW;
val |= pulse_width_bits;
it8709_wr(dev, val, IT85_C0TCR);
}
static void it8709_init_hardware(struct ite_dev *dev)
{
ite_dbg("%s called", __func__);
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
IT85_C0IER);
it8709_wr(dev, ITE_BAUDRATE_DIVISOR & 0xff, IT85_C0BDLR);
it8709_wr(dev, (ITE_BAUDRATE_DIVISOR >> 8) & 0xff,
IT85_C0BDHR);
it8709_wr(dev, (it8709_rr(dev, IT85_C0MSTCR) &
~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL
| IT85_FIFOCLR | IT85_RESET)) | IT85_FIFOTL_DEFAULT,
IT85_C0MSTCR);
it8709_wr(dev, (it8709_rr(dev, IT85_C0RCR) &
~(IT85_RXEN | IT85_RDWOS | IT85_RXEND | IT85_RXACT
| IT85_RXDCR)) | ITE_RXDCR_DEFAULT,
IT85_C0RCR);
it8709_wr(dev, (it8709_rr(dev, IT85_C0TCR) & ~(IT85_TXMPM | IT85_TXMPW))
| IT85_TXRLE | IT85_TXENDF | IT85_TXMPM_DEFAULT
| IT85_TXMPW_DEFAULT,
IT85_C0TCR);
ite_set_carrier_params(dev);
}
/* idle the receiver so that we won't receive samples until another
pulse is detected; this must be called with the device spinlock held */
static void it8709_idle_rx(struct ite_dev *dev)
{
ite_dbg("%s called", __func__);
/* disable streaming by clearing RXACT writing it as 1 */
it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXACT,
IT85_C0RCR);
/* clear the FIFO */
it8709_wr(dev, it8709_rr(dev, IT85_C0MSTCR) | IT85_FIFOCLR,
IT85_C0MSTCR);
}
static void it8709_idle_rx(struct ite_dev *dev)
{
ite_dbg("%s called", __func__);
it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXACT,
IT85_C0RCR);
it8709_wr(dev, it8709_rr(dev, IT85_C0MSTCR) | IT85_FIFOCLR,
IT85_C0MSTCR);
}
static void it8709_disable_rx(struct ite_dev *dev)
{
ite_dbg("%s called", __func__);
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
~(IT85_RDAIE | IT85_RFOIE),
IT85_C0IER);
it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) & ~IT85_RXEN,
IT85_C0RCR);
it8709_idle_rx(dev);
}
/* disable the device; this must be called with the device spinlock held */
static void it8709_disable(struct ite_dev *dev)
{
ite_dbg("%s called", __func__);
/* clear out all interrupt enable flags */
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
IT85_C0IER);
/* disable the receiver */
it8709_disable_rx(dev);
/* erase the FIFO */
it8709_wr(dev, IT85_FIFOCLR | it8709_rr(dev, IT85_C0MSTCR),
IT85_C0MSTCR);
}
/* enable the receiver; this must be called with the device spinlock held */
static void it8709_enable_rx(struct ite_dev *dev)
{
ite_dbg("%s called", __func__);
/* enable the receiver by setting RXEN */
it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXEN,
IT85_C0RCR);
/* just prepare it to idle for the next reception */
it8709_idle_rx(dev);
/* enable the receiver interrupts and master enable flag */
it8709_wr(dev, it8709_rr(dev, IT85_C0IER)
|IT85_RDAIE | IT85_RFOIE | IT85_IEC,
IT85_C0IER);
}
static void it8709_disable(struct ite_dev *dev)
{
ite_dbg("%s called", __func__);
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
IT85_C0IER);
it8709_disable_rx(dev);
it8709_wr(dev, IT85_FIFOCLR | it8709_rr(dev, IT85_C0MSTCR),
IT85_C0MSTCR);
}
/* disable the transmitter interrupt; this must be called with the device
* spinlock held */
static void it8709_disable_tx_interrupt(struct ite_dev *dev)
{
ite_dbg("%s called", __func__);
/* disable the transmitter interrupts */
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & ~IT85_TLDLIE,
IT85_C0IER);
}
/* disable the receiver; this must be called with the device spinlock held */
static void it8709_disable_rx(struct ite_dev *dev)
{
ite_dbg("%s called", __func__);
/* disable the receiver interrupts */
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
~(IT85_RDAIE | IT85_RFOIE),
IT85_C0IER);
/* disable the receiver */
it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) & ~IT85_RXEN,
IT85_C0RCR);
/* clear the FIFO and RXACT (actually RXACT should have been cleared
* in the previous it8709_wr(dev, ) call) */
it8709_idle_rx(dev);
}
/* enable the transmitter interrupt; this must be called with the device
* spinlock held */
static void it8709_enable_tx_interrupt(struct ite_dev *dev)
{
ite_dbg("%s called", __func__);
/* enable the transmitter interrupts and master enable flag */
it8709_wr(dev, it8709_rr(dev, IT85_C0IER)
|IT85_TLDLIE | IT85_IEC,
IT85_C0IER);
}
static void it8709_enable_tx_interrupt(struct ite_dev *dev)
{
ite_dbg("%s called", __func__);
it8709_wr(dev, it8709_rr(dev, IT85_C0IER)
|IT85_TLDLIE | IT85_IEC,
IT85_C0IER);
}
/* return how many bytes are still in the FIFO; this will be called
* with the device spinlock NOT HELD while waiting for the TX FIFO to get
* empty; let's expect this won't be a problem */
static int it8709_get_tx_used_slots(struct ite_dev *dev)
{
ite_dbg("%s called", __func__);
return it8709_rr(dev, IT85_C0TFSR) & IT85_TXFBC;
}
