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/*
*
* BRIEF MODULE DESCRIPTION
* IT8172 Consumer IR port generic routines.
*
* Copyright 2001 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef CONFIG_IT8172_CIR
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/it8172/it8172.h>
#include <asm/it8172/it8172_cir.h>
volatile struct it8172_cir_regs *cir_regs[NUM_CIR_PORTS] = {
(volatile struct it8172_cir_regs *)(KSEG1ADDR(IT8172_PCI_IO_BASE + IT_CIR0_BASE)),
(volatile struct it8172_cir_regs *)(KSEG1ADDR(IT8172_PCI_IO_BASE + IT_CIR1_BASE))};
/*
* Initialize Consumer IR Port.
*/
int cir_port_init(struct cir_port *cir)
{
int port = cir->port;
unsigned char data;
/* set baud rate */
cir_regs[port]->bdlr = cir->baud_rate & 0xff;
cir_regs[port]->bdhr = (cir->baud_rate >> 8) & 0xff;
/* set receiver control register */
cir_regs[port]->rcr = (CIR_SET_RDWOS(cir->rdwos) | CIR_SET_RXDCR(cir->rxdcr));
/* set carrier frequency register */
cir_regs[port]->cfr = (CIR_SET_CF(cir->cfq) | CIR_SET_HS(cir->hcfs));
/* set fifo threshold */
data = cir_regs[port]->mstcr & 0xf3;
data |= CIR_SET_FIFO_TL(cir->fifo_tl);
cir_regs[port]->mstcr = data;
clear_fifo(cir);
enable_receiver(cir);
disable_rx_demodulation(cir);
set_rx_active(cir);
int_enable(cir);
rx_int_enable(cir);
return 0;
}
void clear_fifo(struct cir_port *cir)
{
cir_regs[cir->port]->mstcr |= CIR_FIFO_CLEAR;
}
void enable_receiver(struct cir_port *cir)
{
cir_regs[cir->port]->rcr |= CIR_RXEN;
}
void disable_receiver(struct cir_port *cir)
{
cir_regs[cir->port]->rcr &= ~CIR_RXEN;
}
void enable_rx_demodulation(struct cir_port *cir)
{
cir_regs[cir->port]->rcr |= CIR_RXEND;
}
void disable_rx_demodulation(struct cir_port *cir)
{
cir_regs[cir->port]->rcr &= ~CIR_RXEND;
}
void set_rx_active(struct cir_port *cir)
{
cir_regs[cir->port]->rcr |= CIR_RXACT;
}
void int_enable(struct cir_port *cir)
{
cir_regs[cir->port]->ier |= CIR_IEC;
}
void rx_int_enable(struct cir_port *cir)
{
cir_regs[cir->port]->ier |= CIR_RDAIE;
}
void dump_regs(struct cir_port *cir)
{
printk("mstcr %x ier %x iir %x cfr %x rcr %x tcr %x tfsr %x rfsr %x\n",
cir_regs[cir->port]->mstcr,
cir_regs[cir->port]->ier,
cir_regs[cir->port]->iir,
cir_regs[cir->port]->cfr,
cir_regs[cir->port]->rcr,
cir_regs[cir->port]->tcr,
cir_regs[cir->port]->tfsr,
cir_regs[cir->port]->rfsr);
while (cir_regs[cir->port]->iir & CIR_RDAI) {
printk("data %x\n", cir_regs[cir->port]->dr);
}
}
void dump_reg_addr(struct cir_port *cir)
{
printk("dr %x mstcr %x ier %x iir %x cfr %x rcr %x tcr %x bdlr %x bdhr %x tfsr %x rfsr %x\n",
(unsigned)&cir_regs[cir->port]->dr,
(unsigned)&cir_regs[cir->port]->mstcr,
(unsigned)&cir_regs[cir->port]->ier,
(unsigned)&cir_regs[cir->port]->iir,
(unsigned)&cir_regs[cir->port]->cfr,
(unsigned)&cir_regs[cir->port]->rcr,
(unsigned)&cir_regs[cir->port]->tcr,
(unsigned)&cir_regs[cir->port]->bdlr,
(unsigned)&cir_regs[cir->port]->bdhr,
(unsigned)&cir_regs[cir->port]->tfsr,
(unsigned)&cir_regs[cir->port]->rfsr);
}
int cir_get_rx_count(struct cir_port *cir)
{
return cir_regs[cir->port]->rfsr & CIR_RXFBC_MASK;
}
char cir_read_data(struct cir_port *cir)
{
return cir_regs[cir->port]->dr;
}
char get_int_status(struct cir_port *cir)
{
return cir_regs[cir->port]->iir;
}
#endif
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