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

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  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
172 

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