1 /* $NetBSD: ixp425_com.c,v 1.19 2018/12/08 17:46:10 thorpej Exp $ */
2
3 /*
4 * Copyright 2003 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Steve C. Woodford for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <sys/cdefs.h>
39 __KERNEL_RCSID(0, "$NetBSD: ixp425_com.c,v 1.19 2018/12/08 17:46:10 thorpej Exp $");
40
41 #include "opt_com.h"
42 #ifndef COM_PXA2X0
43 #error "You must use options COM_PXA2X0 to get IXP425 serial port support"
44 #endif
45
46 #include <sys/systm.h>
47 #include <sys/param.h>
48 #include <sys/device.h>
49 #include <sys/termios.h>
50
51 #include <machine/intr.h>
52 #include <sys/bus.h>
53
54 #include <dev/ic/comreg.h>
55 #include <dev/ic/comvar.h>
56
57 #include <arm/xscale/ixp425reg.h>
58 #include <arm/xscale/ixp425var.h>
59 #include <arm/xscale/ixp425_sipvar.h>
60
61 static int ixsipcom_match(device_t, cfdata_t , void *);
62 static void ixsipcom_attach(device_t, device_t, void *);
63
64 CFATTACH_DECL_NEW(ixsipcom, sizeof(struct com_softc),
65 ixsipcom_match, ixsipcom_attach, NULL, NULL);
66
67 static const int uart_irq[] = {IXP425_INT_UART0, IXP425_INT_UART1};
68
69 static int
ixsipcom_match(device_t parent,cfdata_t match,void * aux)70 ixsipcom_match(device_t parent, cfdata_t match, void *aux)
71 {
72 struct ixpsip_attach_args *sa = aux;
73 bus_space_tag_t bt = &ixp425_a4x_bs_tag;
74 bus_space_handle_t bh;
75 int rv;
76
77 if (strcmp(match->cf_name, "ixsipcom") == 0)
78 return 1;
79
80 if (com_is_console(bt, sa->sa_addr, NULL))
81 return (1);
82
83 if (bus_space_map(bt, sa->sa_addr, sa->sa_size, 0, &bh))
84 return (0);
85
86 /* Make sure the UART is enabled */
87 bus_space_write_1(bt, bh, com_ier, IER_EUART);
88
89 rv = comprobe1(bt, bh);
90 bus_space_unmap(bt, bh, sa->sa_size);
91
92 return (rv);
93 }
94
95 static void
ixsipcom_attach(device_t parent,device_t self,void * aux)96 ixsipcom_attach(device_t parent, device_t self, void *aux)
97 {
98 struct com_softc *sc = device_private(self);
99 struct ixpsip_attach_args *sa = aux;
100 bus_space_tag_t iot;
101 bus_space_handle_t ioh;
102 bus_addr_t iobase;
103
104 sc->sc_dev = self;
105 iot = &ixp425_a4x_bs_tag;
106 iobase = sa->sa_addr;
107 sc->sc_frequency = IXP425_UART_FREQ;
108 sc->sc_type = COM_TYPE_PXA2x0;
109
110 if (com_is_console(iot, iobase, &ioh) == 0 &&
111 bus_space_map(iot, iobase, sa->sa_size, 0, &ioh)) {
112 aprint_error(": can't map registers\n");
113 return;
114 }
115 com_init_regs(&sc->sc_regs, iot, ioh, iobase);
116
117 com_attach_subr(sc);
118
119 ixp425_intr_establish(uart_irq[sa->sa_index], IPL_SERIAL, comintr, sc);
120 }
121