1 /* $NetBSD: sscom_s3c2800.c,v 1.11 2022/09/27 06:36:43 skrll Exp $ */
2
3 /*
4 * Copyright (c) 2002, 2003 Fujitsu Component Limited
5 * Copyright (c) 2002, 2003 Genetec Corporation
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of The Fujitsu Component Limited nor the name of
17 * Genetec corporation may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY FUJITSU COMPONENT LIMITED AND GENETEC
21 * CORPORATION ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
22 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL FUJITSU COMPONENT LIMITED OR GENETEC
25 * CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
29 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 __KERNEL_RCSID(0, "$NetBSD: sscom_s3c2800.c,v 1.11 2022/09/27 06:36:43 skrll Exp $");
37
38 #include "opt_sscom.h"
39 #include "opt_ddb.h"
40 #include "opt_kgdb.h"
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/ioctl.h>
45 #include <sys/select.h>
46 #include <sys/tty.h>
47 #include <sys/proc.h>
48 #include <sys/conf.h>
49 #include <sys/file.h>
50 #include <sys/uio.h>
51 #include <sys/kernel.h>
52 #include <sys/syslog.h>
53 #include <sys/types.h>
54 #include <sys/device.h>
55 #include <sys/timepps.h>
56 #include <sys/vnode.h>
57
58 #include <machine/intr.h>
59 #include <sys/bus.h>
60
61 #include <arm/s3c2xx0/s3c2800reg.h>
62 #include <arm/s3c2xx0/s3c2800var.h>
63 #include <arm/s3c2xx0/sscom_var.h>
64 #include <sys/termios.h>
65
66 static int sscom_match(device_t, cfdata_t, void *);
67 static void sscom_attach(device_t, device_t, void *);
68
69 CFATTACH_DECL_NEW(sscom, sizeof(struct sscom_softc), sscom_match,
70 sscom_attach, NULL, NULL);
71
72 const struct sscom_uart_info s3c2800_uart_config[] = {
73 /* UART 0 */
74 {
75 0,
76 S3C2800_INT_TXD0,
77 S3C2800_INT_RXD0,
78 S3C2800_INT_UERR0,
79 S3C2800_UART0_BASE,
80 },
81 /* UART 1 */
82 {
83 1,
84 S3C2800_INT_TXD1,
85 S3C2800_INT_RXD1,
86 S3C2800_INT_UERR1,
87 S3C2800_UART1_BASE,
88 },
89 };
90
91 static int
sscom_match(device_t parent,cfdata_t cf,void * aux)92 sscom_match(device_t parent, cfdata_t cf, void *aux)
93 {
94 struct s3c2xx0_attach_args *sa = aux;
95 int unit = sa->sa_index;
96
97 return unit == 0 || unit == 1;
98 }
99
100 static void
s3c2800_change_txrx_interrupts(struct sscom_softc * sc,bool unmask_p,u_int flags)101 s3c2800_change_txrx_interrupts(struct sscom_softc *sc, bool unmask_p,
102 u_int flags)
103 {
104 int intbits = 0;
105 if (flags & SSCOM_HW_RXINT)
106 intbits |= 1 << sc->sc_rx_irqno;
107 if (flags & SSCOM_HW_TXINT)
108 intbits |= 1 << sc->sc_tx_irqno;
109 if (unmask_p) {
110 s3c2xx0_unmask_interrupts(intbits);
111 } else {
112 s3c2xx0_mask_interrupts(intbits);
113 }
114 }
115
116 static void
sscom_attach(device_t parent,device_t self,void * aux)117 sscom_attach(device_t parent, device_t self, void *aux)
118 {
119 struct sscom_softc *sc = device_private(self);
120 struct s3c2xx0_attach_args *sa = aux;
121 int unit = sa->sa_index;
122 bus_addr_t iobase = s3c2800_uart_config[unit].iobase;
123
124 printf( ": UART%d addr=%lx", sa->sa_index, iobase );
125
126 sc->sc_dev = self;
127 sc->sc_iot = s3c2xx0_softc->sc_iot;
128 sc->sc_unit = unit;
129 sc->sc_frequency = s3c2xx0_softc->sc_pclk;
130
131 sc->sc_change_txrx_interrupts = s3c2800_change_txrx_interrupts;
132
133 sc->sc_rx_irqno = S3C2800_INT_RXD0 + sa->sa_index;
134 sc->sc_tx_irqno = S3C2800_INT_TXD0 + sa->sa_index;
135
136 if (bus_space_map(sc->sc_iot, iobase, SSCOM_SIZE, 0, &sc->sc_ioh)) {
137 printf( ": failed to map registers\n" );
138 return;
139 }
140
141 printf("\n");
142
143 s3c2800_intr_establish(s3c2800_uart_config[unit].tx_int,
144 IPL_SERIAL, IST_LEVEL, sscomtxintr, sc);
145 s3c2800_intr_establish(s3c2800_uart_config[unit].rx_int,
146 IPL_SERIAL, IST_LEVEL, sscomrxintr, sc);
147 s3c2800_intr_establish(s3c2800_uart_config[unit].err_int,
148 IPL_SERIAL, IST_LEVEL, sscomrxintr, sc);
149 sscom_disable_txrxint(sc);
150
151 sscom_attach_subr(sc);
152 }
153
154
155
156 int
s3c2800_sscom_cnattach(bus_space_tag_t iot,int unit,int rate,int frequency,tcflag_t cflag)157 s3c2800_sscom_cnattach(bus_space_tag_t iot, int unit, int rate,
158 int frequency, tcflag_t cflag)
159 {
160 return sscom_cnattach(iot, s3c2800_uart_config + unit,
161 rate, frequency, cflag);
162 }
163
164 #ifdef KGDB
165 int
s3c2800_sscom_kgdb_attach(bus_space_tag_t iot,int unit,int rate,int frequency,tcflag_t cflag)166 s3c2800_sscom_kgdb_attach(bus_space_tag_t iot, int unit, int rate,
167 int frequency, tcflag_t cflag)
168 {
169 return sscom_kgdb_attach(iot, s3c2800_uart_config + unit,
170 rate, frequency, cflag);
171 }
172 #endif /* KGDB */
173