1 /* $NetBSD: imx31_ahb.c,v 1.9 2021/08/07 16:18:44 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 2002, 2005 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 *
55 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
56 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
57 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
58 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
59 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
60 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
61 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
62 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
63 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
64 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
65 * POSSIBILITY OF SUCH DAMAGE.
66 */
67 /*-
68 * Copyright (c) 1999
69 * Shin Takemura and PocketBSD Project. All rights reserved.
70 *
71 * Redistribution and use in source and binary forms, with or without
72 * modification, are permitted provided that the following conditions
73 * are met:
74 * 1. Redistributions of source code must retain the above copyright
75 * notice, this list of conditions and the following disclaimer.
76 * 2. Redistributions in binary form must reproduce the above copyright
77 * notice, this list of conditions and the following disclaimer in the
78 * documentation and/or other materials provided with the distribution.
79 * 3. All advertising materials mentioning features or use of this software
80 * must display the following acknowledgement:
81 * This product includes software developed by the PocketBSD project
82 * and its contributors.
83 * 4. Neither the name of the project nor the names of its contributors
84 * may be used to endorse or promote products derived from this software
85 * without specific prior written permission.
86 *
87 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
88 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
89 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
90 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
91 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
92 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
93 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
94 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
95 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
96 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
97 * SUCH DAMAGE.
98 *
99 */
100
101 #include <sys/cdefs.h>
102 __KERNEL_RCSID(0, "$Id: imx31_ahb.c,v 1.9 2021/08/07 16:18:44 thorpej Exp $");
103
104 #include "locators.h"
105 #include "avic.h"
106
107 #include <sys/param.h>
108 #include <sys/systm.h>
109 #include <sys/device.h>
110 #include <sys/kernel.h>
111 #include <sys/reboot.h>
112
113 #include <machine/cpu.h>
114 #include <sys/bus.h>
115
116 #include <arm/cpufunc.h>
117 #include <arm/mainbus/mainbus.h>
118
119 #include <machine/intr.h>
120
121 #include <arm/imx/imx31reg.h>
122 #include <arm/imx/imx31var.h>
123
124 struct ahb_softc {
125 device_t sc_dev;
126 bus_dma_tag_t sc_dmat;
127 bus_space_tag_t sc_memt;
128 bus_space_handle_t sc_memh;
129 };
130
131 /* prototypes */
132 static int ahb_match(device_t, cfdata_t, void *);
133 static void ahb_attach(device_t, device_t, void *);
134 static int ahb_search(device_t, cfdata_t, const int *, void *);
135 static void ahb_attach_critical(struct ahb_softc *);
136 static int ahbbus_print(void *, const char *);
137
138 /* attach structures */
139 CFATTACH_DECL_NEW(ahb, sizeof(struct ahb_softc),
140 ahb_match, ahb_attach, NULL, NULL);
141
142 static struct ahb_softc *ahb_sc;
143
144 static int
ahb_match(device_t parent,cfdata_t match,void * aux)145 ahb_match(device_t parent, cfdata_t match, void *aux)
146 {
147 return 1;
148 }
149
150 static void
ahb_attach(device_t parent,device_t self,void * aux)151 ahb_attach(device_t parent, device_t self, void *aux)
152 {
153 struct ahb_softc *sc = device_private(self);
154 struct ahb_attach_args ahba;
155
156 ahb_sc = sc;
157 sc->sc_dev = self;
158 sc->sc_memt = &imx_bs_tag;
159 #if NBUS_DMA_GENERIC > 0
160 sc->sc_dmat = &imx_bus_dma_tag;
161 #else
162 sc->sc_dmat = 0;
163 #endif
164
165 aprint_normal(": AHB-Lite 2.v6 bus interface\n");
166
167 /*
168 * Attach critical devices
169 */
170 ahb_attach_critical(sc);
171
172 /*
173 * Attach all other devices
174 */
175 ahba.ahba_name = "ahb";
176 ahba.ahba_memt = sc->sc_memt;
177 ahba.ahba_dmat = sc->sc_dmat;
178 config_search(self, &ahba,
179 CFARGS(.search = ahb_search));
180 }
181
182 static int
ahb_search(device_t parent,cfdata_t cf,const int * ldesc,void * aux)183 ahb_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
184 {
185 struct ahb_attach_args * const ahba = aux;
186
187 ahba->ahba_addr = cf->cf_loc[AHBCF_ADDR];
188 ahba->ahba_size = cf->cf_loc[AHBCF_SIZE];
189 ahba->ahba_intr = cf->cf_loc[AHBCF_INTR];
190 ahba->ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE];
191
192 if (config_probe(parent, cf, ahba))
193 config_attach(parent, cf, ahba, ahbbus_print, CFARGS_NONE);
194
195 return 0;
196 }
197
198 static int
ahb_find(device_t parent,cfdata_t cf,const int * ldesc,void * aux)199 ahb_find(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
200 {
201 struct ahb_attach_args * const ahba = aux;
202 struct ahb_attach_args ahba0;
203
204 if (strcmp(ahba->ahba_name, "ahb"))
205 return 0;
206 if (ahba->ahba_addr != AHBCF_ADDR_DEFAULT
207 && ahba->ahba_addr != cf->cf_loc[AHBCF_ADDR])
208 return 0;
209 if (ahba->ahba_size != AHBCF_SIZE_DEFAULT
210 && ahba->ahba_size != cf->cf_loc[AHBCF_SIZE])
211 return 0;
212 if (ahba->ahba_intr != AHBCF_INTR_DEFAULT
213 && ahba->ahba_intr != cf->cf_loc[AHBCF_INTR])
214 return 0;
215 if (ahba->ahba_irqbase != AHBCF_IRQBASE_DEFAULT
216 && ahba->ahba_irqbase != cf->cf_loc[AHBCF_IRQBASE])
217 return 0;
218
219 ahba0 = *ahba;
220 ahba0.ahba_addr = cf->cf_loc[AHBCF_ADDR];
221 ahba0.ahba_size = cf->cf_loc[AHBCF_SIZE];
222 ahba0.ahba_intr = cf->cf_loc[AHBCF_INTR];
223 ahba0.ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE];
224
225 return config_match(parent, cf, &ahba0);
226 }
227
228 #if NAVIC == 0
229 #error no avic present in config file
230 #endif
231
232 static const struct {
233 const char *name;
234 bus_addr_t addr;
235 bool required;
236 } critical_devs[] = {
237 { .name = "avic", .addr = INTC_BASE, .required = true },
238 { .name = "gpio1", .addr = GPIO1_BASE, .required = false },
239 { .name = "gpio2", .addr = GPIO2_BASE, .required = false },
240 { .name = "gpio3", .addr = GPIO3_BASE, .required = false },
241 #if 0
242 { .name = "dmac", .addr = DMAC_BASE, .required = true },
243 #endif
244 };
245
246 static void
ahb_attach_critical(struct ahb_softc * sc)247 ahb_attach_critical(struct ahb_softc *sc)
248 {
249 struct ahb_attach_args ahba;
250 cfdata_t cf;
251 size_t i;
252
253 for (i = 0; i < __arraycount(critical_devs); i++) {
254 ahba.ahba_name = "ahb";
255 ahba.ahba_memt = sc->sc_memt;
256 ahba.ahba_dmat = sc->sc_dmat;
257
258 ahba.ahba_addr = critical_devs[i].addr;
259 ahba.ahba_size = AHBCF_SIZE_DEFAULT;
260 ahba.ahba_intr = AHBCF_INTR_DEFAULT;
261 ahba.ahba_irqbase = AHBCF_IRQBASE_DEFAULT;
262
263 cf = config_search(sc->sc_dev, &ahba,
264 CFARGS(.submatch = ahb_find));
265 if (cf == NULL && critical_devs[i].required)
266 panic("ahb_attach_critical: failed to find %s!",
267 critical_devs[i].name);
268
269 ahba.ahba_addr = cf->cf_loc[AHBCF_ADDR];
270 ahba.ahba_size = cf->cf_loc[AHBCF_SIZE];
271 ahba.ahba_intr = cf->cf_loc[AHBCF_INTR];
272 ahba.ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE];
273 config_attach(sc->sc_dev, cf, &ahba, ahbbus_print, CFARGS_NONE);
274 }
275 }
276
277 static int
ahbbus_print(void * aux,const char * name)278 ahbbus_print(void *aux, const char *name)
279 {
280 struct ahb_attach_args *ahba = aux;
281
282 if (ahba->ahba_addr != AHBCF_ADDR_DEFAULT) {
283 aprint_normal(" addr 0x%lx", ahba->ahba_addr);
284 if (ahba->ahba_size > AHBCF_SIZE_DEFAULT)
285 aprint_normal("-0x%lx",
286 ahba->ahba_addr + ahba->ahba_size-1);
287 }
288 if (ahba->ahba_intr != AHBCF_INTR_DEFAULT)
289 aprint_normal(" intr %d", ahba->ahba_intr);
290 if (ahba->ahba_irqbase != AHBCF_IRQBASE_DEFAULT)
291 aprint_normal(" irqbase %d", ahba->ahba_irqbase);
292
293 return (UNCONF);
294 }
295
296 static inline uint32_t
read_clock_counter_xsc1(void)297 read_clock_counter_xsc1(void)
298 {
299 uint32_t x;
300 __asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (x) );
301
302 return x;
303 }
304
305 static inline uint32_t
read_clock_counter_xsc2(void)306 read_clock_counter_xsc2(void)
307 {
308 uint32_t x;
309 __asm volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (x) );
310
311 return x;
312 }
313
314