1 /* $Id: rmixl_com.c,v 1.8 2018/12/11 06:34:00 thorpej Exp $ */
2 /*-
3 * Copyright (c) 2006 Urbana-Champaign Independent Media Center.
4 * Copyright (c) 2006 Garrett D'Amore.
5 * All rights reserved.
6 *
7 * Portions of this code were written by Garrett D'Amore for the
8 * Champaign-Urbana Community Wireless Network Project.
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions 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
16 * copyright notice, this list of conditions and the following
17 * disclaimer in the documentation and/or other materials provided
18 * with the distribution.
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgements:
21 * This product includes software developed by the Urbana-Champaign
22 * Independent Media Center.
23 * This product includes software developed by Garrett D'Amore.
24 * 4. Urbana-Champaign Independent Media Center's name and Garrett
25 * D'Amore's name may not be used to endorse or promote products
26 * derived from this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT
29 * MEDIA CENTER AND GARRETT D'AMORE ``AS IS'' AND ANY EXPRESS OR
30 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
31 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT
33 * MEDIA CENTER OR GARRETT D'AMORE BE LIABLE FOR ANY DIRECT, INDIRECT,
34 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
35 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
36 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
37 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
38 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
40 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 */
42
43 /*-
44 * Copyright (c) 1998 The NetBSD Foundation, Inc.
45 * All rights reserved.
46 *
47 * This code is derived from software contributed to The NetBSD Foundation
48 * by Charles M. Hannum.
49 *
50 * Redistribution and use in source and binary forms, with or without
51 * modification, are permitted provided that the following conditions
52 * are met:
53 * 1. Redistributions of source code must retain the above copyright
54 * notice, this list of conditions and the following disclaimer.
55 * 2. Redistributions in binary form must reproduce the above copyright
56 * notice, this list of conditions and the following disclaimer in the
57 * documentation and/or other materials provided with the distribution.
58 *
59 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
60 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
61 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
62 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
63 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
64 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
65 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
66 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
67 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
68 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
69 * POSSIBILITY OF SUCH DAMAGE.
70 */
71
72 /*-
73 * Copyright (c) 1991 The Regents of the University of California.
74 * All rights reserved.
75 *
76 * Redistribution and use in source and binary forms, with or without
77 * modification, are permitted provided that the following conditions
78 * are met:
79 * 1. Redistributions of source code must retain the above copyright
80 * notice, this list of conditions and the following disclaimer.
81 * 2. Redistributions in binary form must reproduce the above copyright
82 * notice, this list of conditions and the following disclaimer in the
83 * documentation and/or other materials provided with the distribution.
84 * 3. Neither the name of the University nor the names of its contributors
85 * may be used to endorse or promote products derived from this software
86 * without specific prior written permission.
87 *
88 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
89 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
90 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
91 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
92 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
93 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
94 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
95 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
96 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
97 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
98 * SUCH DAMAGE.
99 *
100 * @(#)com.c 7.5 (Berkeley) 5/16/91
101 */
102
103 #include <sys/cdefs.h>
104 __KERNEL_RCSID(0, "$NetBSD: rmixl_com.c,v 1.8 2018/12/11 06:34:00 thorpej Exp $");
105
106 #include <sys/param.h>
107 #include <sys/systm.h>
108 #include <sys/device.h>
109 #include <sys/kernel.h>
110 #include <sys/termios.h>
111 #include <sys/ttydefaults.h>
112 #include <sys/types.h>
113
114 #include <sys/bus.h>
115
116 #include <dev/cons.h>
117 #include <dev/ic/comreg.h>
118 #include <dev/ic/comvar.h>
119
120 #include <mips/cpuregs.h>
121
122 #include <mips/rmi/rmixlvar.h>
123 #include <mips/rmi/rmixl_intr.h>
124 #include <mips/rmi/rmixl_obiovar.h>
125 #include <mips/rmi/rmixl_comvar.h>
126
127 /* span of UART regs in bytes */
128 #define RMIXL_IO_DEV_UART_SIZE (COM_NPORTS * sizeof(uint32_t))
129
130 struct rmixl_com_softc {
131 struct com_softc sc_com;
132 };
133
134 static void rmixl_com_init_regs(struct com_regs *, bus_space_tag_t,
135 bus_space_handle_t, bus_addr_t);
136 static int rmixl_com_match(device_t, cfdata_t , void *);
137 static void rmixl_com_attach(device_t, device_t, void *);
138
139 CFATTACH_DECL_NEW(com_rmixl, sizeof(struct rmixl_com_softc),
140 rmixl_com_match, rmixl_com_attach, NULL, NULL);
141
142 volatile int32_t *com0addr = (int32_t *)
143 MIPS_PHYS_TO_KSEG1(RMIXL_IO_DEV_PBASE + RMIXL_IO_DEV_UART_1);
144
145 extern int comcnfreq;
146 extern int comcnspeed;
147
148 void
rmixl_putchar_init(uint64_t io_pbase)149 rmixl_putchar_init(uint64_t io_pbase)
150 {
151 int rate;
152 extern int comspeed(long, long, int);
153
154 com0addr = (uint32_t *)
155 MIPS_PHYS_TO_KSEG1(io_pbase + RMIXL_IO_DEV_UART_1);
156
157 if (comcnfreq != -1) {
158 rate = comspeed(comcnspeed, comcnfreq, COM_TYPE_NORMAL);
159 if (rate < 0)
160 return; /* XXX */
161
162 com0addr[com_ier] = 0;
163 com0addr[com_lctl] = htobe32(LCR_DLAB);
164 com0addr[com_dlbl] = htobe32(rate & 0xff);
165 com0addr[com_dlbh] = htobe32(rate >> 8);
166 com0addr[com_lctl] = htobe32(LCR_8BITS); /* XXX */
167 com0addr[com_mcr] = htobe32(MCR_DTR|MCR_RTS);
168 com0addr[com_fifo] = htobe32(
169 FIFO_ENABLE|FIFO_RCV_RST|FIFO_XMT_RST|FIFO_TRIGGER_1);
170 }
171 }
172
173
174 void
rmixl_putchar(char c)175 rmixl_putchar(char c)
176 {
177 int timo = 150000;
178
179 while ((be32toh(com0addr[com_lsr]) & LSR_TXRDY) == 0)
180 if (--timo == 0)
181 break;
182
183 com0addr[com_data] = htobe32((uint32_t)c);
184
185 while ((be32toh(com0addr[com_lsr]) & LSR_TSRE) == 0)
186 if (--timo == 0)
187 break;
188 }
189
190 void
rmixl_puts(const char * restrict s)191 rmixl_puts(const char *restrict s)
192 {
193 char c;
194
195 while ((c = *s++) != 0)
196 rmixl_putchar(c);
197 }
198
199 static char hexc[] = "0123456789abcdef";
200
201 #define RMIXL_PUTHEX \
202 u_int shift = sizeof(val) * 8; \
203 rmixl_putchar('0'); \
204 rmixl_putchar('x'); \
205 do { \
206 shift -= 4; \
207 rmixl_putchar(hexc[(val >> shift) & 0xf]); \
208 } while(shift != 0)
209
210 void
rmixl_puthex32(uint32_t val)211 rmixl_puthex32(uint32_t val)
212 {
213 RMIXL_PUTHEX;
214 }
215
216 void
rmixl_puthex64(uint64_t val)217 rmixl_puthex64(uint64_t val)
218 {
219 RMIXL_PUTHEX;
220 }
221
222 int
rmixl_com_match(device_t parent,cfdata_t cf,void * aux)223 rmixl_com_match(device_t parent, cfdata_t cf, void *aux)
224 {
225 struct obio_attach_args *obio = aux;
226 bus_space_tag_t bst;
227 bus_space_handle_t ioh;
228 bus_addr_t addr;
229 bus_size_t size;
230 struct com_regs regs;
231 int rv;
232
233 bst = obio->obio_eb_bst;
234 addr = obio->obio_addr;
235 size = (bus_size_t)RMIXL_IO_DEV_UART_SIZE;
236
237 if (com_is_console(bst, addr, ®s.cr_ioh))
238 return 1;
239
240 if (bus_space_map(bst, addr, size, 0, &ioh))
241 return 0; /* FAIL */
242
243 rmixl_com_init_regs(®s, bst, ioh, addr);
244
245 rv = com_probe_subr(®s);
246
247 bus_space_unmap(bst, ioh, size);
248
249 return rv;
250 }
251
252 void
rmixl_com_attach(device_t parent,device_t self,void * aux)253 rmixl_com_attach(device_t parent, device_t self, void *aux)
254 {
255 struct rmixl_com_softc *rsc = device_private(self);
256 struct com_softc *sc = &rsc->sc_com;
257 struct obio_attach_args *obio = aux;
258 bus_space_tag_t bst;
259 bus_space_handle_t ioh;
260 bus_addr_t addr;
261 bus_size_t size;
262
263 sc->sc_dev = self;
264 sc->sc_frequency = comcnfreq;
265
266 bst = obio->obio_eb_bst;
267 addr = obio->obio_addr;
268 size = (bus_size_t)RMIXL_IO_DEV_UART_SIZE;
269
270 if (!com_is_console(bst, addr, &ioh)
271 && bus_space_map(bst, addr, size, 0, &ioh) != 0) {
272 aprint_error(": can't map registers\n");
273 return;
274 }
275
276 rmixl_com_init_regs(&sc->sc_regs, bst, ioh, addr);
277
278 com_attach_subr(sc);
279
280 rmixl_intr_establish(obio->obio_intr, obio->obio_tmsk,
281 IPL_VM, RMIXL_TRIG_LEVEL, RMIXL_POLR_HIGH,
282 comintr, sc, true);
283
284 }
285
286 void
rmixl_com_init_regs(struct com_regs * regsp,bus_space_tag_t st,bus_space_handle_t sh,bus_addr_t addr)287 rmixl_com_init_regs(struct com_regs *regsp, bus_space_tag_t st,
288 bus_space_handle_t sh, bus_addr_t addr)
289 {
290
291 com_init_regs_stride(regsp, st, sh, addr, 2);
292 }
293
294 void
rmixl_com_cnattach(bus_addr_t addr,int speed,int freq,int type,tcflag_t mode)295 rmixl_com_cnattach(bus_addr_t addr, int speed, int freq,
296 int type, tcflag_t mode)
297 {
298 bus_space_tag_t bst;
299 struct com_regs regs;
300
301 bst = (bus_space_tag_t)&rmixl_configuration.rc_obio_eb_memt;
302
303 rmixl_com_init_regs(®s, bst, 0, addr);
304
305 comcnattach1(®s, speed, freq, type, mode);
306 }
307