static void pxa_irda_shutdown(struct pxa_irda *si)
{
unsigned long flags;
local_irq_save(flags);
/* disable STUART and interrupt */
STIER = 0;
/* disable STUART SIR mode */
STISR = 0;
/* disable DMA */
DCSR(si->txdma) &= ~DCSR_RUN;
DCSR(si->rxdma) &= ~DCSR_RUN;
/* disable FICP */
ICCR0 = 0;
/* disable the STUART or FICP clocks */
pxa_irda_disable_clk(si);
DRCMR(17) = 0;
DRCMR(18) = 0;
local_irq_restore(flags);
/* power off board transceiver */
si->pdata->transceiver_mode(si->dev, IR_OFF);
printk(KERN_DEBUG "pxa_ir: irda shutdown\n");
}
static void pxa_irda_shutdown(struct pxa_irda *si)
{
unsigned long flags;
local_irq_save(flags);
STIER = 0;
STISR = 0;
DCSR(si->txdma) &= ~DCSR_RUN;
DCSR(si->rxdma) &= ~DCSR_RUN;
ICCR0 = 0;
pxa_irda_disable_clk(si);
DRCMR(17) = 0;
DRCMR(18) = 0;
local_irq_restore(flags);
pxa_irda_set_mode(si, IR_OFF);
printk(KERN_DEBUG "pxa_ir: irda shutdown\n");
}
/*
* Set the IrDA communications speed.
*/
static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
{
unsigned long flags;
unsigned int divisor;
switch (speed) {
case 9600: case 19200: case 38400:
case 57600: case 115200:
/* refer to PXA250/210 Developer's Manual 10-7 */
/* BaudRate = 14.7456 MHz / (16*Divisor) */
divisor = 14745600 / (16 * speed);
local_irq_save(flags);
if (IS_FIR(si)) {
/* stop RX DMA */
DCSR(si->rxdma) &= ~DCSR_RUN;
/* disable FICP */
ICCR0 = 0;
pxa_irda_disable_clk(si);
/* set board transceiver to SIR mode */
si->pdata->transceiver_mode(si->dev, IR_SIRMODE);
/* enable the STUART clock */
pxa_irda_enable_sirclk(si);
}
/* disable STUART first */
STIER = 0;
/* access DLL & DLH */
STLCR |= LCR_DLAB;
STDLL = divisor & 0xff;
STDLH = divisor >> 8;
STLCR &= ~LCR_DLAB;
si->speed = speed;
STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6;
STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE;
local_irq_restore(flags);
break;
case 4000000:
local_irq_save(flags);
/* disable STUART */
STIER = 0;
STISR = 0;
pxa_irda_disable_clk(si);
/* disable FICP first */
ICCR0 = 0;
/* set board transceiver to FIR mode */
si->pdata->transceiver_mode(si->dev, IR_FIRMODE);
/* enable the FICP clock */
pxa_irda_enable_firclk(si);
si->speed = speed;
pxa_irda_fir_dma_rx_start(si);
ICCR0 = ICCR0_ITR | ICCR0_RXE;
local_irq_restore(flags);
break;
default:
return -EINVAL;
}
return 0;
}
static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
{
unsigned long flags;
unsigned int divisor;
switch (speed) {
case 9600: case 19200: case 38400:
case 57600: case 115200:
divisor = 14745600 / (16 * speed);
local_irq_save(flags);
if (IS_FIR(si)) {
DCSR(si->rxdma) &= ~DCSR_RUN;
ICCR0 = 0;
pxa_irda_disable_clk(si);
pxa_irda_set_mode(si, IR_SIRMODE);
pxa_irda_enable_sirclk(si);
}
STIER = 0;
STLCR |= LCR_DLAB;
STDLL = divisor & 0xff;
STDLH = divisor >> 8;
STLCR &= ~LCR_DLAB;
si->speed = speed;
STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6;
STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE;
local_irq_restore(flags);
break;
case 4000000:
local_irq_save(flags);
STIER = 0;
STISR = 0;
pxa_irda_disable_clk(si);
ICCR0 = 0;
pxa_irda_set_mode(si, IR_FIRMODE);
pxa_irda_enable_firclk(si);
si->speed = speed;
pxa_irda_fir_dma_rx_start(si);
ICCR0 = ICCR0_ITR | ICCR0_RXE;
local_irq_restore(flags);
break;
default:
return -EINVAL;
}
return 0;
}
