1 /*-
2 * Copyright (c) 2012 The NetBSD Foundation, Inc.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Paul Fleischer <paul@xpg.dk>
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 *
17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 /* Derived from sscom_s3c2410.c */
31
32 /*
33 * Copyright (c) 2002, 2003 Fujitsu Component Limited
34 * Copyright (c) 2002, 2003 Genetec Corporation
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. Neither the name of The Fujitsu Component Limited nor the name of
46 * Genetec corporation may not be used to endorse or promote products
47 * derived from this software without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY FUJITSU COMPONENT LIMITED AND GENETEC
50 * CORPORATION ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
51 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
52 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
53 * DISCLAIMED. IN NO EVENT SHALL FUJITSU COMPONENT LIMITED OR GENETEC
54 * CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
57 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
58 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
59 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
60 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61 * SUCH DAMAGE.
62 */
63
64 #include <sys/cdefs.h>
65 __KERNEL_RCSID(0, "$NetBSD: sscom_s3c2440.c,v 1.4 2014/03/14 21:40:48 matt Exp $");
66
67 #include "opt_sscom.h"
68 #include "opt_ddb.h"
69 #include "opt_kgdb.h"
70
71 #include <sys/param.h>
72 #include <sys/systm.h>
73 #include <sys/device.h>
74
75 #include <sys/bus.h>
76 #include <machine/intr.h>
77
78 #include <arm/s3c2xx0/s3c2440reg.h>
79 #include <arm/s3c2xx0/s3c2440var.h>
80 #include <arm/s3c2xx0/sscom_var.h>
81
82 #include "locators.h"
83
84 static int sscom_match(device_t, cfdata_t, void *);
85 static void sscom_attach(device_t, device_t, void *);
86
87 CFATTACH_DECL_NEW(sscom, sizeof(struct sscom_softc), sscom_match,
88 sscom_attach, NULL, NULL);
89
90 const static struct sscom_uart_info s3c2440_uart_config[] = {
91 /* UART 0 */
92 {
93 0,
94 S3C2440_INT_TXD0,
95 S3C2440_INT_RXD0,
96 S3C2440_INT_ERR0,
97 S3C2440_UART_BASE(0),
98 },
99 /* UART 1 */
100 {
101 1,
102 S3C2440_INT_TXD1,
103 S3C2440_INT_RXD1,
104 S3C2440_INT_ERR1,
105 S3C2440_UART_BASE(1),
106 },
107 /* UART 2 */
108 {
109 2,
110 S3C2440_INT_TXD2,
111 S3C2440_INT_RXD2,
112 S3C2440_INT_ERR2,
113 S3C2440_UART_BASE(2),
114 },
115 };
116 static int found;
117
118 static int
sscom_match(device_t parent,struct cfdata * cf,void * aux)119 sscom_match(device_t parent, struct cfdata *cf, void *aux)
120 {
121 struct s3c2xx0_attach_args *sa = aux;
122 int unit = sa->sa_index;
123
124 if (unit == SSIOCF_INDEX_DEFAULT && found == 0)
125 return 1;
126 return (unit == 0 || unit == 1 || unit == 2);
127 }
128
129 #define _sscom_intbit(irqno) (1<<((irqno)-S3C2440_SUBIRQ_MIN))
130
131 static void
s3c2440_change_txrx_interrupts(struct sscom_softc * sc,bool unmask_p,u_int flags)132 s3c2440_change_txrx_interrupts(struct sscom_softc *sc, bool unmask_p,
133 u_int flags)
134 {
135 int intrbits = 0;
136 if (flags & SSCOM_HW_RXINT)
137 intrbits |= _sscom_intbit((sc)->sc_rx_irqno);
138 if (flags & SSCOM_HW_TXINT)
139 intrbits |= _sscom_intbit((sc)->sc_tx_irqno);
140 if (unmask_p) {
141 s3c2440_unmask_subinterrupts(intrbits);
142 } else {
143 s3c2440_mask_subinterrupts(intrbits);
144 }
145 }
146
147 static void
sscom_attach(device_t parent,device_t self,void * aux)148 sscom_attach(device_t parent, device_t self, void *aux)
149 {
150 struct sscom_softc *sc = device_private(self);
151 struct s3c2xx0_attach_args *sa = aux;
152 int unit;
153 bus_addr_t iobase;
154
155 found = 1;
156 unit = (sa->sa_index == SSIOCF_INDEX_DEFAULT) ? 0 : sa->sa_index;
157 iobase = s3c2440_uart_config[unit].iobase;
158
159 sc->sc_dev = self;
160 sc->sc_iot = s3c2xx0_softc->sc_iot;
161 sc->sc_unit = unit;
162 sc->sc_frequency = s3c2xx0_softc->sc_pclk;
163
164 sc->sc_change_txrx_interrupts = s3c2440_change_txrx_interrupts;
165
166 sc->sc_rx_irqno = s3c2440_uart_config[unit].rx_int;
167 sc->sc_tx_irqno = s3c2440_uart_config[unit].tx_int;
168
169 if (bus_space_map(sc->sc_iot, iobase, SSCOM_SIZE, 0, &sc->sc_ioh)) {
170 printf( ": failed to map registers\n" );
171 return;
172 }
173
174 printf("\n");
175
176 s3c24x0_intr_establish(s3c2440_uart_config[unit].tx_int,
177 IPL_SERIAL, IST_LEVEL, sscomtxintr, sc);
178 s3c24x0_intr_establish(s3c2440_uart_config[unit].rx_int,
179 IPL_SERIAL, IST_LEVEL, sscomrxintr, sc);
180 s3c24x0_intr_establish(s3c2440_uart_config[unit].err_int,
181 IPL_SERIAL, IST_LEVEL, sscomrxintr, sc);
182 sscom_disable_txrxint(sc);
183
184 sscom_attach_subr(sc);
185 }
186
187 int
s3c2440_sscom_cnattach(bus_space_tag_t iot,int unit,int rate,int frequency,tcflag_t cflag)188 s3c2440_sscom_cnattach(bus_space_tag_t iot, int unit, int rate,
189 int frequency, tcflag_t cflag)
190 {
191 #if defined(SSCOM0CONSOLE) || defined(SSCOM1CONSOLE)
192 return sscom_cnattach(iot, s3c2440_uart_config + unit,
193 rate, frequency, cflag);
194 #else
195 return 0;
196 #endif
197 }
198
199 #ifdef KGDB
200 int
s3c2440_sscom_kgdb_attach(bus_space_tag_t iot,int unit,int rate,int frequency,tcflag_t cflag)201 s3c2440_sscom_kgdb_attach(bus_space_tag_t iot, int unit, int rate,
202 int frequency, tcflag_t cflag)
203 {
204 return sscom_kgdb_attach(iot, s3c2440_uart_config + unit,
205 rate, frequency, cflag);
206 }
207 #endif /* KGDB */
208