pxa2x0.c revision 1.1.2.3 1 /* $NetBSD: pxa2x0.c,v 1.1.2.3 2003/01/03 16:41:12 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 2002 Genetec Corporation. All rights reserved.
5 * Written by Hiroyuki Bessho for Genetec Corporation.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed for the NetBSD Project by
18 * Genetec Corporation.
19 * 4. The name of Genetec Corporation may not be used to endorse or
20 * promote products derived from this software without specific prior
21 * written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION
27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 *
35 *
36 * Autoconfiguration support for the Intel PXA2[15]0 application
37 * processor. This code is derived from arm/sa11x0/sa11x0.c
38 */
39
40 /*-
41 * Copyright (c) 2001, The NetBSD Foundation, Inc. All rights reserved.
42 *
43 * This code is derived from software contributed to The NetBSD Foundation
44 * by IWAMOTO Toshihiro and Ichiro FUKUHARA.
45 *
46 * Redistribution and use in source and binary forms, with or without
47 * modification, are permitted provided that the following conditions
48 * are met:
49 * 1. Redistributions of source code must retain the above copyright
50 * notice, this list of conditions and the following disclaimer.
51 * 2. Redistributions in binary form must reproduce the above copyright
52 * notice, this list of conditions and the following disclaimer in the
53 * documentation and/or other materials provided with the distribution.
54 * 3. All advertising materials mentioning features or use of this software
55 * must display the following acknowledgement:
56 * This product includes software developed by the NetBSD
57 * Foundation, Inc. and its contributors.
58 * 4. Neither the name of The NetBSD Foundation nor the names of its
59 * contributors may be used to endorse or promote products derived
60 * from this software without specific prior written permission.
61 */
62 /*-
63 * Copyright (c) 1999
64 * Shin Takemura and PocketBSD Project. All rights reserved.
65 *
66 * Redistribution and use in source and binary forms, with or without
67 * modification, are permitted provided that the following conditions
68 * are met:
69 * 1. Redistributions of source code must retain the above copyright
70 * notice, this list of conditions and the following disclaimer.
71 * 2. Redistributions in binary form must reproduce the above copyright
72 * notice, this list of conditions and the following disclaimer in the
73 * documentation and/or other materials provided with the distribution.
74 * 3. All advertising materials mentioning features or use of this software
75 * must display the following acknowledgement:
76 * This product includes software developed by the PocketBSD project
77 * and its contributors.
78 * 4. Neither the name of the project nor the names of its contributors
79 * may be used to endorse or promote products derived from this software
80 * without specific prior written permission.
81 *
82 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
83 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
84 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
85 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
86 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
87 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
88 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
89 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
90 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
91 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
92 * SUCH DAMAGE.
93 *
94 */
95
96 #include <sys/param.h>
97 #include <sys/systm.h>
98 #include <sys/device.h>
99 #include <sys/kernel.h>
100 #include <sys/reboot.h>
101
102 #include <machine/cpu.h>
103 #include <machine/bus.h>
104
105 #include <arm/cpufunc.h>
106 #include <arm/mainbus/mainbus.h>
107 #include <arm/xscale/pxa2x0reg.h>
108 #include <arm/xscale/pxa2x0var.h>
109
110 #include "locators.h"
111
112 /* prototypes */
113 static int pxa2x0_match(struct device *, struct cfdata *, void *);
114 static void pxa2x0_attach(struct device *, struct device *, void *);
115 static int pxa2x0_search(struct device *, struct cfdata *, void *);
116
117 /* attach structures */
118 CFATTACH_DECL(pxaip, sizeof(struct pxa2x0_softc), pxa2x0_match, pxa2x0_attach,
119 NULL, NULL);
120
121 extern struct bus_space pxa2x0_bs_tag;
122
123 struct pxa2x0_softc *pxa2x0_softc;
124
125 static int
126 pxa2x0_print(void *aux, const char *name)
127 {
128 struct pxa2x0_attach_args *sa = (struct pxa2x0_attach_args*)aux;
129
130 if (sa->pxa_size)
131 aprint_normal(" addr 0x%lx", sa->pxa_addr);
132 if (sa->pxa_size > 1)
133 aprint_normal("-0x%lx", sa->pxa_addr + sa->pxa_size - 1);
134 if (sa->pxa_intr > 1)
135 aprint_normal(" intr %d", sa->pxa_intr);
136 if (sa->pxa_gpio != -1)
137 aprint_normal(" gpio %d", sa->pxa_gpio);
138
139 return (UNCONF);
140 }
141
142 int
143 pxa2x0_match(struct device *parent, struct cfdata *match, void *aux)
144 {
145 return 1;
146 }
147
148 void
149 pxa2x0_attach(struct device *parent, struct device *self, void *aux)
150 {
151 struct pxa2x0_softc *sc = (struct pxa2x0_softc*)self;
152 bus_space_tag_t iot;
153 const char *which_registers; /* for panic message */
154
155 #define FAIL(which) do { \
156 which_registers=(which); goto abort; }while(/*CONSTCOND*/0)
157
158 pxa2x0_softc = sc;
159 sc->saip.sc_iot = iot = &pxa2x0_bs_tag;
160
161 if (bus_space_map(iot,
162 PXA2X0_INTCTL_BASE, PXA2X0_INTCTL_SIZE,
163 0, &sc->saip.sc_ioh))
164 FAIL("intc");
165
166 /* Map the GPIO registers */
167 if (bus_space_map(iot, PXA2X0_GPIO_BASE, PXA2X0_GPIO_SIZE,
168 0, &sc->saip.sc_gpioh))
169 FAIL("GPIO");
170
171 /* Map the DMA controller registers */
172 if (bus_space_map(iot, PXA2X0_DMAC_BASE, PXA2X0_DMAC_SIZE,
173 0, &sc->saip.sc_dmach))
174 FAIL("DMAC");
175
176 /* Memory controller */
177 if( bus_space_map(iot, PXA2X0_MEMCTL_BASE,
178 PXA2X0_MEMCTL_SIZE, 0, &sc->sc_memctl_ioh) )
179 FAIL("MEMC");
180 /* Clock manager */
181 if( bus_space_map(iot, PXA2X0_CLKMAN_BASE,
182 PXA2X0_CLKMAN_SIZE, 0, &sc->sc_clkman_ioh) )
183 FAIL("CLK");
184
185 /* Real time clock */
186 if( bus_space_map(iot, PXA2X0_RTC_BASE,
187 PXA2X0_RTC_SIZE, 0, &sc->sc_rtc_ioh) )
188 FAIL("RTC");
189
190 #if 1
191 /* This takes 2 secs at most. */
192 {
193 int cpuclock;
194
195 cpuclock = pxa2x0_measure_cpuclock( sc ) / 1000;
196 printf( " CPU clock = %d.%03d MHz", cpuclock/1000, cpuclock%1000 );
197 }
198 #endif
199 printf("\n");
200
201 pxa2x0_set_intcbase(sc->saip.sc_ioh);
202 pxa2x0_intr_init();
203
204 /*
205 * Attach devices.
206 */
207 config_search(pxa2x0_search, self, NULL);
208 return;
209
210 abort:
211 panic("%s: unable to map %s registers\n",
212 self->dv_xname, which_registers);
213
214 #undef FAIL
215 }
216
217 int
218 pxa2x0_search(struct device *parent, struct cfdata *cf, void *aux)
219 {
220 struct pxa2x0_softc *sc = (struct pxa2x0_softc *)parent;
221 struct pxa2x0_attach_args aa;
222
223 aa.pxa_sc = sc;
224 aa.pxa_iot = sc->saip.sc_iot;
225 aa.pxa_addr = cf->cf_loc[PXAIPCF_ADDR];
226 aa.pxa_size = cf->cf_loc[PXAIPCF_SIZE];
227 aa.pxa_index = cf->cf_loc[PXAIPCF_INDEX];
228 aa.pxa_sa.sa_membase = 0;
229 aa.pxa_sa.sa_memsize = 0;
230 aa.pxa_intr = cf->cf_loc[PXAIPCF_INTR];
231 aa.pxa_gpio = cf->cf_loc[PXAIPCF_GPIO];
232
233 if (config_match(parent, cf, &aa))
234 config_attach(parent, cf, &aa, pxa2x0_print);
235
236 return 0;
237 }
238
239 static inline uint32_t
240 read_clock_counter(void)
241 {
242 uint32_t x;
243 __asm __volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (x) );
244
245 return x;
246 }
247
248 int
249 pxa2x0_measure_cpuclock( struct pxa2x0_softc *sc )
250 {
251 uint32_t rtc0, rtc1, start, end;
252 uint32_t pmcr_save;
253 bus_space_tag_t iot = sc->saip.sc_iot;
254 bus_space_handle_t rtc_ioh = sc->sc_rtc_ioh;
255 int irq = disable_interrupts(I32_bit|F32_bit);
256
257 __asm __volatile( "mrc p14, 0, %0, c0, c0, 0" : "=r" (pmcr_save) );
258 /* Enable clock counter */
259 __asm __volatile( "mcr p14, 0, %0, c0, c0, 0" : : "r" (0x0001) );
260
261 rtc0 = bus_space_read_4( iot, rtc_ioh, RTC_RCNR );
262 /* Wait for next second starts */
263 while( (rtc1 = bus_space_read_4( iot, rtc_ioh, RTC_RCNR )) == rtc0 )
264 ;
265 start = read_clock_counter();
266 while( rtc1 == bus_space_read_4( iot, rtc_ioh, RTC_RCNR ) )
267 ; /* Wait for 1sec */
268 end = read_clock_counter();
269
270 __asm __volatile( "mcr p14, 0, %0, c0, c0, 0" : : "r" (pmcr_save) );
271 restore_interrupts(irq);
272
273 return end - start;
274 }
275
276 void
277 pxa2x0_turbo_mode( int f )
278 {
279 __asm __volatile("mcr p14, 0, %0, c6, c0, 0" : : "r" (f));
280 }
281