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 */
cir_port_init(struct cir_port * cir)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
clear_fifo(struct cir_port * cir)84 void clear_fifo(struct cir_port *cir)
85 {
86 cir_regs[cir->port]->mstcr |= CIR_FIFO_CLEAR;
87 }
88
enable_receiver(struct cir_port * cir)89 void enable_receiver(struct cir_port *cir)
90 {
91 cir_regs[cir->port]->rcr |= CIR_RXEN;
92 }
93
disable_receiver(struct cir_port * cir)94 void disable_receiver(struct cir_port *cir)
95 {
96 cir_regs[cir->port]->rcr &= ~CIR_RXEN;
97 }
98
enable_rx_demodulation(struct cir_port * cir)99 void enable_rx_demodulation(struct cir_port *cir)
100 {
101 cir_regs[cir->port]->rcr |= CIR_RXEND;
102 }
103
disable_rx_demodulation(struct cir_port * cir)104 void disable_rx_demodulation(struct cir_port *cir)
105 {
106 cir_regs[cir->port]->rcr &= ~CIR_RXEND;
107 }
108
set_rx_active(struct cir_port * cir)109 void set_rx_active(struct cir_port *cir)
110 {
111 cir_regs[cir->port]->rcr |= CIR_RXACT;
112 }
113
int_enable(struct cir_port * cir)114 void int_enable(struct cir_port *cir)
115 {
116 cir_regs[cir->port]->ier |= CIR_IEC;
117 }
118
rx_int_enable(struct cir_port * cir)119 void rx_int_enable(struct cir_port *cir)
120 {
121 cir_regs[cir->port]->ier |= CIR_RDAIE;
122 }
123
dump_regs(struct cir_port * cir)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
dump_reg_addr(struct cir_port * cir)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
cir_get_rx_count(struct cir_port * cir)157 int cir_get_rx_count(struct cir_port *cir)
158 {
159 return cir_regs[cir->port]->rfsr & CIR_RXFBC_MASK;
160 }
161
cir_read_data(struct cir_port * cir)162 char cir_read_data(struct cir_port *cir)
163 {
164 return cir_regs[cir->port]->dr;
165 }
166
get_int_status(struct cir_port * cir)167 char get_int_status(struct cir_port *cir)
168 {
169 return cir_regs[cir->port]->iir;
170 }
171 #endif
172