1 /* $NetBSD: pxa2x0_com.c,v 1.14 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: pxa2x0_com.c,v 1.14 2018/12/08 17:46:10 thorpej Exp $");
40
41 #include "opt_com.h"
42
43 #ifndef COM_PXA2X0
44 #error "You must use options COM_PXA2X0 to get PXA2x0 serial port support"
45 #endif
46
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/device.h>
50 #include <sys/termios.h>
51
52 #include <machine/intr.h>
53 #include <sys/bus.h>
54
55 #include <dev/ic/comreg.h>
56 #include <dev/ic/comvar.h>
57
58 #include <arm/xscale/pxa2x0cpu.h>
59 #include <arm/xscale/pxa2x0reg.h>
60 #include <arm/xscale/pxa2x0var.h>
61 #include <arm/xscale/pxa2x0_gpio.h>
62
63 #include "locators.h"
64
65 static int pxauart_match(device_t, cfdata_t , void *);
66 static void pxauart_attach(device_t, device_t, void *);
67
68 CFATTACH_DECL_NEW(pxauart, sizeof(struct com_softc),
69 pxauart_match, pxauart_attach, NULL, NULL);
70
71 static int
pxauart_match(device_t parent,cfdata_t cf,void * aux)72 pxauart_match(device_t parent, cfdata_t cf, void *aux)
73 {
74 struct pxaip_attach_args *pxa = aux;
75 bus_space_tag_t bt = &pxa2x0_a4x_bs_tag; /* XXX: This sucks */
76 bus_space_handle_t bh;
77 struct pxa2x0_gpioconf *gpioconf;
78 u_int gpio;
79 int rv, i;
80
81 switch (pxa->pxa_addr) {
82 case PXA2X0_FFUART_BASE:
83 if (pxa->pxa_intr != PXA2X0_INT_FFUART)
84 return (0);
85 gpioconf = CPU_IS_PXA250 ? pxa25x_com_ffuart_gpioconf :
86 pxa27x_com_ffuart_gpioconf;
87 break;
88
89 case PXA2X0_STUART_BASE:
90 if (pxa->pxa_intr != PXA2X0_INT_STUART)
91 return (0);
92 gpioconf = CPU_IS_PXA250 ? pxa25x_com_stuart_gpioconf :
93 pxa27x_com_stuart_gpioconf;
94 break;
95
96 case PXA2X0_BTUART_BASE: /* XXX: Config file option ... */
97 if (pxa->pxa_intr != PXA2X0_INT_BTUART)
98 return (0);
99 gpioconf = CPU_IS_PXA250 ? pxa25x_com_btuart_gpioconf :
100 pxa27x_com_btuart_gpioconf;
101 break;
102
103 case PXA2X0_HWUART_BASE:
104 if (pxa->pxa_intr != PXA2X0_INT_HWUART)
105 return (0);
106 if (CPU_IS_PXA270)
107 return (0);
108 gpioconf = pxa25x_com_hwuart_gpioconf;
109 break;
110
111 default:
112 return (0);
113 }
114 for (i = 0; gpioconf[i].pin != -1; i++) {
115 gpio = pxa2x0_gpio_get_function(gpioconf[i].pin);
116 if (GPIO_FN(gpio) != GPIO_FN(gpioconf[i].value) ||
117 GPIO_FN_IS_OUT(gpio) != GPIO_FN_IS_OUT(gpioconf[i].value))
118 return (0);
119 }
120
121 pxa->pxa_size = 0x20;
122
123 if (com_is_console(bt, pxa->pxa_addr, NULL))
124 return (1);
125
126 if (bus_space_map(bt, pxa->pxa_addr, pxa->pxa_size, 0, &bh))
127 return (0);
128
129 /* Make sure the UART is enabled */
130 bus_space_write_1(bt, bh, com_ier, IER_EUART);
131
132 rv = comprobe1(bt, bh);
133 bus_space_unmap(bt, bh, pxa->pxa_size);
134
135 return (rv);
136 }
137
138 static void
pxauart_attach(device_t parent,device_t self,void * aux)139 pxauart_attach(device_t parent, device_t self, void *aux)
140 {
141 struct com_softc *sc = device_private(self);
142 struct pxaip_attach_args *pxa = aux;
143 bus_space_tag_t iot;
144 bus_space_handle_t ioh;
145 bus_addr_t iobase;
146 int cken = 0;
147
148 sc->sc_dev = self;
149 iot = &pxa2x0_a4x_bs_tag; /* XXX: This sucks */
150 iobase = pxa->pxa_addr;
151 sc->sc_frequency = PXA2X0_COM_FREQ;
152 sc->sc_type = COM_TYPE_PXA2x0;
153
154 if (com_is_console(iot, iobase, &ioh) == 0 &&
155 bus_space_map(iot, iobase, pxa->pxa_size, 0, &ioh)) {
156 aprint_error(": can't map registers\n");
157 return;
158 }
159 com_init_regs(&sc->sc_regs, iot, ioh, iobase);
160
161 switch (pxa->pxa_addr) {
162 case PXA2X0_FFUART_BASE: cken = CKEN_FFUART; break;
163 case PXA2X0_STUART_BASE: cken = CKEN_STUART; break;
164 case PXA2X0_BTUART_BASE: cken = CKEN_BTUART; break;
165 case PXA2X0_HWUART_BASE: cken = CKEN_HWUART; break;
166 }
167 pxa2x0_clkman_config(cken, 1);
168
169 com_attach_subr(sc);
170
171 pxa2x0_intr_establish(pxa->pxa_intr, IPL_SERIAL, comintr, sc);
172 }
173