171 lines
4.5 KiB
C
171 lines
4.5 KiB
C
/*
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*
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* BRIEF MODULE DESCRIPTION
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* IT8172 Consumer IR port generic routines.
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*
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* Copyright 2001 MontaVista Software Inc.
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* Author: MontaVista Software, Inc.
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* ppopov@mvista.com or source@mvista.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifdef CONFIG_IT8172_CIR
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <asm/it8172/it8172.h>
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#include <asm/it8172/it8172_cir.h>
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volatile struct it8172_cir_regs *cir_regs[NUM_CIR_PORTS] = {
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(volatile struct it8172_cir_regs *)(KSEG1ADDR(IT8172_PCI_IO_BASE + IT_CIR0_BASE)),
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(volatile struct it8172_cir_regs *)(KSEG1ADDR(IT8172_PCI_IO_BASE + IT_CIR1_BASE))};
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/*
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* Initialize Consumer IR Port.
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*/
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int cir_port_init(struct cir_port *cir)
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{
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int port = cir->port;
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unsigned char data;
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/* set baud rate */
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cir_regs[port]->bdlr = cir->baud_rate & 0xff;
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cir_regs[port]->bdhr = (cir->baud_rate >> 8) & 0xff;
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/* set receiver control register */
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cir_regs[port]->rcr = (CIR_SET_RDWOS(cir->rdwos) | CIR_SET_RXDCR(cir->rxdcr));
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/* set carrier frequency register */
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cir_regs[port]->cfr = (CIR_SET_CF(cir->cfq) | CIR_SET_HS(cir->hcfs));
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/* set fifo threshold */
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data = cir_regs[port]->mstcr & 0xf3;
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data |= CIR_SET_FIFO_TL(cir->fifo_tl);
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cir_regs[port]->mstcr = data;
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clear_fifo(cir);
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enable_receiver(cir);
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disable_rx_demodulation(cir);
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set_rx_active(cir);
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int_enable(cir);
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rx_int_enable(cir);
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return 0;
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}
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void clear_fifo(struct cir_port *cir)
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{
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cir_regs[cir->port]->mstcr |= CIR_FIFO_CLEAR;
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}
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void enable_receiver(struct cir_port *cir)
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{
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cir_regs[cir->port]->rcr |= CIR_RXEN;
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}
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void disable_receiver(struct cir_port *cir)
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{
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cir_regs[cir->port]->rcr &= ~CIR_RXEN;
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}
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void enable_rx_demodulation(struct cir_port *cir)
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{
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cir_regs[cir->port]->rcr |= CIR_RXEND;
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}
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void disable_rx_demodulation(struct cir_port *cir)
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{
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cir_regs[cir->port]->rcr &= ~CIR_RXEND;
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}
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void set_rx_active(struct cir_port *cir)
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{
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cir_regs[cir->port]->rcr |= CIR_RXACT;
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}
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void int_enable(struct cir_port *cir)
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{
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cir_regs[cir->port]->ier |= CIR_IEC;
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}
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void rx_int_enable(struct cir_port *cir)
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{
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cir_regs[cir->port]->ier |= CIR_RDAIE;
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}
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void dump_regs(struct cir_port *cir)
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{
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printk("mstcr %x ier %x iir %x cfr %x rcr %x tcr %x tfsr %x rfsr %x\n",
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cir_regs[cir->port]->mstcr,
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cir_regs[cir->port]->ier,
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cir_regs[cir->port]->iir,
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cir_regs[cir->port]->cfr,
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cir_regs[cir->port]->rcr,
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cir_regs[cir->port]->tcr,
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cir_regs[cir->port]->tfsr,
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cir_regs[cir->port]->rfsr);
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while (cir_regs[cir->port]->iir & CIR_RDAI) {
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printk("data %x\n", cir_regs[cir->port]->dr);
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}
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}
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void dump_reg_addr(struct cir_port *cir)
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{
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printk("dr %x mstcr %x ier %x iir %x cfr %x rcr %x tcr %x bdlr %x bdhr %x tfsr %x rfsr %x\n",
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(unsigned)&cir_regs[cir->port]->dr,
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(unsigned)&cir_regs[cir->port]->mstcr,
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(unsigned)&cir_regs[cir->port]->ier,
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(unsigned)&cir_regs[cir->port]->iir,
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(unsigned)&cir_regs[cir->port]->cfr,
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(unsigned)&cir_regs[cir->port]->rcr,
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(unsigned)&cir_regs[cir->port]->tcr,
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(unsigned)&cir_regs[cir->port]->bdlr,
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(unsigned)&cir_regs[cir->port]->bdhr,
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(unsigned)&cir_regs[cir->port]->tfsr,
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(unsigned)&cir_regs[cir->port]->rfsr);
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}
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int cir_get_rx_count(struct cir_port *cir)
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{
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return cir_regs[cir->port]->rfsr & CIR_RXFBC_MASK;
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}
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char cir_read_data(struct cir_port *cir)
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{
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return cir_regs[cir->port]->dr;
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}
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char get_int_status(struct cir_port *cir)
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{
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return cir_regs[cir->port]->iir;
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}
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#endif
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