arch/mips/ite-boards/generic/it8172_cir.c

   1 /*
   2  *
   3  * BRIEF MODULE DESCRIPTION
   4  *      IT8172 Consumer IR port generic routines.
   5  *
   6  * Copyright 2001 MontaVista Software Inc.
   7  * Author: MontaVista Software, Inc.
   8  *              ppopov@mvista.com or source@mvista.com
   9  *
  10  *  This program is free software; you can redistribute  it and/or modify it
  11  *  under  the terms of  the GNU General  Public License as published by the
  12  *  Free Software Foundation;  either version 2 of the  License, or (at your
  13  *  option) any later version.
  14  *
  15  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  16  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  17  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  18  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  19  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  21  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  22  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  23  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  *  You should have received a copy of the  GNU General Public License along
  27  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  28  *  675 Mass Ave, Cambridge, MA 02139, USA.
  29  */
  30
  31 #include <linux/config.h>
  32
  33 #ifdef CONFIG_IT8172_CIR
  34
  35 #include <linux/types.h>
  36 #include <linux/pci.h>
  37 #include <linux/kernel.h>
  38 #include <linux/init.h>
  39
  40 #include <asm/it8172/it8172.h>
  41 #include <asm/it8172/it8172_cir.h>
  42
  43
  44 volatile struct it8172_cir_regs *cir_regs[NUM_CIR_PORTS] = {
  45         (volatile struct it8172_cir_regs *)(KSEG1ADDR(IT8172_PCI_IO_BASE + IT_CIR0_BASE)),
  46         (volatile struct it8172_cir_regs *)(KSEG1ADDR(IT8172_PCI_IO_BASE + IT_CIR1_BASE))};
  47
  48
  49 /*
  50  * Initialize Consumer IR Port.
  51  */
  52 int cir_port_init(struct cir_port *cir)
  53 {
  54         int port = cir->port;
  55         unsigned char data;
  56
  57         /* set baud rate */
  58         cir_regs[port]->bdlr = cir->baud_rate & 0xff;
  59         cir_regs[port]->bdhr = (cir->baud_rate >> 8) & 0xff;
  60
  61         /* set receiver control register */
  62         cir_regs[port]->rcr = (CIR_SET_RDWOS(cir->rdwos) | CIR_SET_RXDCR(cir->rxdcr));
  63
  64         /* set carrier frequency register */
  65         cir_regs[port]->cfr = (CIR_SET_CF(cir->cfq) | CIR_SET_HS(cir->hcfs));
  66
  67         /* set fifo threshold */
  68         data = cir_regs[port]->mstcr & 0xf3;
  69         data |= CIR_SET_FIFO_TL(cir->fifo_tl);
  70         cir_regs[port]->mstcr = data;
  71
  72         clear_fifo(cir);
  73         enable_receiver(cir);
  74         disable_rx_demodulation(cir);
  75
  76         set_rx_active(cir);
  77         int_enable(cir);
  78         rx_int_enable(cir);
  79
  80         return 0;
  81 }
  82
  83
  84 void clear_fifo(struct cir_port *cir)
  85 {
  86         cir_regs[cir->port]->mstcr |= CIR_FIFO_CLEAR;
  87 }
  88
  89 void enable_receiver(struct cir_port *cir)
  90 {
  91         cir_regs[cir->port]->rcr |= CIR_RXEN;
  92 }
  93
  94 void disable_receiver(struct cir_port *cir)
  95 {
  96         cir_regs[cir->port]->rcr &= ~CIR_RXEN;
  97 }
  98
  99 void enable_rx_demodulation(struct cir_port *cir)
 100 {
 101         cir_regs[cir->port]->rcr |= CIR_RXEND;
 102 }
 103
 104 void disable_rx_demodulation(struct cir_port *cir)
 105 {
 106         cir_regs[cir->port]->rcr &= ~CIR_RXEND;
 107 }
 108
 109 void set_rx_active(struct cir_port *cir)
 110 {
 111         cir_regs[cir->port]->rcr |= CIR_RXACT;
 112 }
 113
 114 void int_enable(struct cir_port *cir)
 115 {
 116         cir_regs[cir->port]->ier |= CIR_IEC;
 117 }
 118
 119 void rx_int_enable(struct cir_port *cir)
 120 {
 121         cir_regs[cir->port]->ier |= CIR_RDAIE;
 122 }
 123
 124 void dump_regs(struct cir_port *cir)
 125 {
 126         printk("mstcr %x ier %x iir %x cfr %x rcr %x tcr %x tfsr %x rfsr %x\n",
 127         cir_regs[cir->port]->mstcr,
 128         cir_regs[cir->port]->ier,
 129         cir_regs[cir->port]->iir,
 130         cir_regs[cir->port]->cfr,
 131         cir_regs[cir->port]->rcr,
 132         cir_regs[cir->port]->tcr,
 133         cir_regs[cir->port]->tfsr,
 134         cir_regs[cir->port]->rfsr);
 135
 136         while (cir_regs[cir->port]->iir & CIR_RDAI) {
 137                 printk("data %x\n", cir_regs[cir->port]->dr);
 138         }
 139 }
 140
 141 void dump_reg_addr(struct cir_port *cir)
 142 {
 143         printk("dr %x mstcr %x ier %x iir %x cfr %x rcr %x tcr %x bdlr %x bdhr %x tfsr %x rfsr %x\n",
 144         (unsigned)&cir_regs[cir->port]->dr,
 145         (unsigned)&cir_regs[cir->port]->mstcr,
 146         (unsigned)&cir_regs[cir->port]->ier,
 147         (unsigned)&cir_regs[cir->port]->iir,
 148         (unsigned)&cir_regs[cir->port]->cfr,
 149         (unsigned)&cir_regs[cir->port]->rcr,
 150         (unsigned)&cir_regs[cir->port]->tcr,
 151         (unsigned)&cir_regs[cir->port]->bdlr,
 152         (unsigned)&cir_regs[cir->port]->bdhr,
 153         (unsigned)&cir_regs[cir->port]->tfsr,
 154         (unsigned)&cir_regs[cir->port]->rfsr);
 155 }
 156
 157 int cir_get_rx_count(struct cir_port *cir)
 158 {
 159         return cir_regs[cir->port]->rfsr & CIR_RXFBC_MASK;
 160 }
 161
 162 char cir_read_data(struct cir_port *cir)
 163 {
 164         return cir_regs[cir->port]->dr;
 165 }
 166
 167 char get_int_status(struct cir_port *cir)
 168 {
 169         return cir_regs[cir->port]->iir;
 170 }
 171 #endif