1 /* $Id: imx23_plcom.c,v 1.2 2018/10/23 09:15:35 jmcneill Exp $ */
2
3 /*
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Petri Laakso
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /* Interface to plcom (PL011) serial driver. */
33
34 #include <sys/param.h>
35 #include <sys/types.h>
36 #include <sys/bus.h>
37 #include <sys/device.h>
38 #include <sys/systm.h>
39 #include <sys/termios.h>
40
41 #include <arm/pic/picvar.h>
42
43 #include <arm/imx/imx23var.h>
44 #include <arm/imx/imx23_uartdbgreg.h>
45
46 #include <evbarm/dev/plcomreg.h>
47 #include <evbarm/dev/plcomvar.h>
48
49 static int imx23_plcom_match(device_t, cfdata_t, void *);
50 static void imx23_plcom_attach(device_t, device_t, void *);
51
52 CFATTACH_DECL3_NEW(imx23plcom,
53 sizeof(struct plcom_softc),
54 imx23_plcom_match,
55 imx23_plcom_attach,
56 NULL,
57 NULL,
58 NULL,
59 NULL,
60 0);
61
62 static int
imx23_plcom_match(device_t parent,cfdata_t cf,void * aux)63 imx23_plcom_match(device_t parent, cfdata_t cf, void *aux)
64 {
65 struct apb_attach_args *aaa = aux;
66
67 if (aaa->aa_addr == HW_UARTDBG_BASE &&
68 aaa->aa_size == PL011COM_UART_SIZE) {
69 return 1;
70 }
71
72 return 0;
73 }
74
75 static void
imx23_plcom_attach(device_t parent,device_t self,void * aux)76 imx23_plcom_attach(device_t parent, device_t self, void *aux)
77 {
78 static int plcom_attached = 0;
79 struct plcom_softc *sc = device_private(self);
80 struct apb_attach_args *aaa = aux;
81 void *ih;
82
83 if (plcom_attached)
84 return;
85
86 aprint_naive("\n");
87 aprint_normal("\n");
88
89 sc->sc_dev = self;
90 sc->sc_frequency = IMX23_UART_CLK;
91 sc->sc_hwflags = PLCOM_HW_TXFIFO_DISABLE;
92 sc->sc_swflags = 0;
93 sc->sc_set_mcr = NULL;
94 sc->sc_set_mcr_arg = NULL;
95
96 sc->sc_pi.pi_type = PLCOM_TYPE_PL011;
97 sc->sc_pi.pi_flags = PLC_FLAG_32BIT_ACCESS;
98 sc->sc_pi.pi_iot = aaa->aa_iot;
99 sc->sc_pi.pi_iobase = aaa->aa_addr;
100
101 if (bus_space_map(aaa->aa_iot, aaa->aa_addr, PL011COM_UART_SIZE, 0,
102 &sc->sc_pi.pi_ioh)) {
103 aprint_error_dev(sc->sc_dev, "unable to map device\n");
104 return;
105 }
106
107 plcom_attach_subr(sc);
108
109 ih = intr_establish(aaa->aa_irq, IPL_SERIAL, IST_LEVEL,
110 plcomintr, sc);
111
112 if (ih == NULL)
113 panic("%s: cannot install interrupt handler",
114 device_xname(sc->sc_dev));
115
116 plcom_attached = 1;
117
118 return;
119 }
120