diff options
Diffstat (limited to 'arch/mips/ite-boards/generic/it8172_cir.c')
| -rw-r--r-- | arch/mips/ite-boards/generic/it8172_cir.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/arch/mips/ite-boards/generic/it8172_cir.c b/arch/mips/ite-boards/generic/it8172_cir.c new file mode 100644 index 00000000000..19deb153d00 --- /dev/null +++ b/arch/mips/ite-boards/generic/it8172_cir.c @@ -0,0 +1,171 @@ +/* + * + * 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. + */ + +#include <linux/config.h> + +#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 |