1/*	$Id: mmnet_machdep.c,v 1.6 2020/04/18 11:00:40 skrll Exp $	*/
2/*	$NetBSD: mmnet_machdep.c,v 1.6 2020/04/18 11:00:40 skrll Exp $	*/
3
4/*
5 * Copyright (c) 2007 Embedtronics Oy
6 * Based on tsarm_machdep.c
7 *
8 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
9 * All rights reserved.
10 *
11 * Based on code written by Jason R. Thorpe and Steve C. Woodford for
12 * Wasabi Systems, Inc.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 *    notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 *    notice, this list of conditions and the following disclaimer in the
21 *    documentation and/or other materials provided with the distribution.
22 * 3. All advertising materials mentioning features or use of this software
23 *    must display the following acknowledgement:
24 *	This product includes software developed for the NetBSD Project by
25 *	Wasabi Systems, Inc.
26 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
27 *    or promote products derived from this software without specific prior
28 *    written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
32 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
33 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
34 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
38 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40 * POSSIBILITY OF SUCH DAMAGE.
41 */
42
43/*
44 * Copyright (c) 1997,1998 Mark Brinicombe.
45 * Copyright (c) 1997,1998 Causality Limited.
46 * All rights reserved.
47 *
48 * Redistribution and use in source and binary forms, with or without
49 * modification, are permitted provided that the following conditions
50 * are met:
51 * 1. Redistributions of source code must retain the above copyright
52 *    notice, this list of conditions and the following disclaimer.
53 * 2. Redistributions in binary form must reproduce the above copyright
54 *    notice, this list of conditions and the following disclaimer in the
55 *    documentation and/or other materials provided with the distribution.
56 * 3. All advertising materials mentioning features or use of this software
57 *    must display the following acknowledgement:
58 *	This product includes software developed by Mark Brinicombe
59 *	for the NetBSD Project.
60 * 4. The name of the company nor the name of the author may be used to
61 *    endorse or promote products derived from this software without specific
62 *    prior written permission.
63 *
64 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
65 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
66 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
67 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
68 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
69 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
70 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
72 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
73 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
74 * SUCH DAMAGE.
75 *
76 * Machine dependant functions for kernel setup for Iyonix.
77 */
78/* Adaptation for Propox MMnet by Aymeric Vincent is in the public domain */
79
80#include <sys/cdefs.h>
81__KERNEL_RCSID(0, "$NetBSD: mmnet_machdep.c,v 1.6 2020/04/18 11:00:40 skrll Exp $");
82
83#include "opt_ddb.h"
84#include "opt_kgdb.h"
85
86#include <sys/param.h>
87#include <sys/bus.h>
88#include <sys/device.h>
89#include <sys/systm.h>
90#include <sys/kernel.h>
91#include <sys/exec.h>
92#include <sys/proc.h>
93#include <sys/msgbuf.h>
94#include <sys/reboot.h>
95#include <sys/termios.h>
96#include <sys/ksyms.h>
97
98#include <uvm/uvm_extern.h>
99
100#include <dev/cons.h>
101
102#include <machine/db_machdep.h>
103#include <ddb/db_sym.h>
104#include <ddb/db_extern.h>
105
106#define	DRAM_BLOCKS	1
107#include <machine/bootconfig.h>
108#include <machine/cpu.h>
109#include <machine/frame.h>
110#include <arm/undefined.h>
111
112#include <arm/arm32/machdep.h>
113
114#include <arm/at91/at91reg.h>
115#include <arm/at91/at91var.h>
116
117#include <dev/ic/comreg.h>
118#include <dev/ic/comvar.h>
119
120#include <machine/autoconf.h>
121
122#include "isa.h"
123
124#include <arm/at91/at91sam9260reg.h>
125#include <arm/at91/at91sam9260busvar.h>
126
127#include "ksyms.h"
128
129#include <arm/at91/at91busvar.h>
130#include <arm/at91/at91pdcreg.h>
131#include <arm/at91/at91dbgureg.h>
132#include <arm/at91/at91reg.h>
133#include <arm/at91/at91streg.h>
134
135/* boot configuration: */
136BootConfig bootconfig;		/* Boot config storage */
137char *boot_args = NULL;
138char *boot_file = NULL;
139
140/* hmmm */
141static struct arm32_dma_range mmnet_dma_ranges[4];
142static struct at91bus_machdep mmnetbus;
143static at91bus_tag_t old_at91bus_tag;
144
145/* Prototypes */
146static void mmnet_device_register(device_t dev, void *aux);
147static void mmnetbus_init(struct at91bus_clocks *);
148static void mmnetbus_peripheral_clock(int pid, int enable);
149static uint32_t mmnetbus_gpio_mask(int pid);
150
151
152/*
153 * void cpu_reboot(int howto, char *bootstr)
154 *
155 * Reboots the system
156 *
157 * Deal with any syncing, unmounting, dumping and shutdown hooks,
158 * then reset the CPU.
159 */
160void
161cpu_reboot(int howto, char *bootstr)
162{
163
164	/*
165	 * If we are still cold then hit the air brakes
166	 * and crash to earth fast
167	 */
168	if (cold) {
169		doshutdownhooks();
170		pmf_system_shutdown(boothowto);
171		printf("\r\n");
172		printf("The operating system has halted.\r\n");
173		printf("Please press any key to reboot.\r\n");
174		cngetc();
175		printf("\r\nrebooting...\r\n");
176		goto reset;
177	}
178
179	/* Disable console buffering */
180
181	/*
182	 * If RB_NOSYNC was not specified sync the discs.
183	 * Note: Unless cold is set to 1 here, syslogd will die during the
184	 * unmount.  It looks like syslogd is getting woken up only to find
185	 * that it cannot page part of the binary in as the filesystem has
186	 * been unmounted.
187	 */
188	if (!(howto & RB_NOSYNC))
189		bootsync();
190
191	/* Say NO to interrupts */
192	splhigh();
193
194	/* Do a dump if requested. */
195	if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
196		dumpsys();
197
198	/* Run any shutdown hooks */
199	doshutdownhooks();
200
201	pmf_system_shutdown(boothowto);
202
203	/* Make sure IRQ's are disabled */
204	IRQdisable;
205
206	if (howto & RB_HALT) {
207		printf("\r\n");
208		printf("The operating system has halted.\r\n");
209		printf("Please press any key to reboot.\r\n");
210		cngetc();
211	}
212
213	printf("\r\nrebooting...\r\n");
214 reset:
215	/*
216	 * Make really really sure that all interrupts are disabled,
217	 * and poke the Internal Bus and Peripheral Bus reset lines.
218	 */
219	(void) disable_interrupts(I32_bit|F32_bit);
220	STREG(ST_WDMR)	= ST_WDMR_EXTEN | ST_WDMR_RSTEN | 1;
221	STREG(ST_CR)	= ST_CR_WDRST;
222	for (;;);
223}
224
225/*
226 * vaddr_t initarm(...)
227 *
228 * Initial entry point on startup. This gets called before main() is
229 * entered.
230 * It should be responsible for setting up everything that must be
231 * in place when main is called.
232 * This includes
233 *   Taking a copy of the boot configuration structure.
234 *   Initialising the physical console so characters can be printed.
235 *   Setting up page tables for the kernel
236 *   Initialising interrupt controllers to a sane default state
237 */
238vaddr_t
239initarm(void *arg)
240{
241	vaddr_t sp;
242	/*
243	 * basic AT91 initialization:
244	 */
245	if (at91bus_init())
246		panic("%s: at91bus_init() failed", __FUNCTION__);
247
248	if (AT91_CHIP_ID() == AT91SAM9260_CHIP_ID) {
249		memcpy(&mmnetbus, at91bus_tag, sizeof(mmnetbus));
250		mmnetbus.init = mmnetbus_init;
251		mmnetbus.peripheral_clock = mmnetbus_peripheral_clock;
252		mmnetbus.gpio_mask = mmnetbus_gpio_mask;
253		old_at91bus_tag = at91bus_tag;
254		at91bus_tag = &mmnetbus;
255	}
256
257 	/* Fake bootconfig structure for the benefit of pmap.c */
258 	/* XXX must make the memory description h/w independent */
259 	bootconfig.dramblocks = 1;
260 	bootconfig.dram[0].address = 0x20000000UL;
261 	bootconfig.dram[0].pages =   0x04000000UL / PAGE_SIZE;
262	sp = at91bus_setup(&bootconfig);
263
264	if (AT91_CHIP_ID() != AT91SAM9260_CHIP_ID)
265		panic("%s: processor is not AT91SAM9260", __FUNCTION__);
266
267	/* we've a specific device_register routine */
268	evbarm_device_register = mmnet_device_register;
269
270	/* We return the new stack pointer address */
271	return sp;
272}
273
274
275bus_dma_tag_t
276at91_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template)
277{
278	int i;
279	struct arm32_bus_dma_tag *dmat;
280
281	for (i = 0; i < bootconfig.dramblocks; i++) {
282		mmnet_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address;
283		mmnet_dma_ranges[i].dr_busbase = bootconfig.dram[i].address;
284		mmnet_dma_ranges[i].dr_len = bootconfig.dram[i].pages *
285			PAGE_SIZE;
286	}
287
288	dmat = dma_tag_template;
289
290	dmat->_ranges = mmnet_dma_ranges;
291	dmat->_nranges = bootconfig.dramblocks;
292
293	return dmat;
294}
295
296void mmnetbus_init(struct at91bus_clocks *clocks)
297{
298	(*old_at91bus_tag->init)(clocks);
299}
300
301uint32_t mmnetbus_gpio_mask(int pid)
302{
303	switch (pid) {
304	case PID_PIOA:	return ~0x00000300U;
305	case PID_PIOB:	return ~0x0000783FU;
306	case PID_PIOC:	return ~0x00000000U;
307	default:	return ~0x00000000U;
308	}
309}
310
311void mmnetbus_peripheral_clock(int pid, int enable)
312{
313	switch (pid) {
314	case PID_TWI:
315		if (enable) {
316			PIOA_WRITE(PIO_ASR, 0x06000000);
317			PIOA_WRITE(PIO_PDR, 0x06000000);
318			PIOA_WRITE(PIO_MDER, 0x06000000);
319		}
320		break;
321
322	case PID_SPI0:
323		if (enable) {
324			PIOA_WRITE(PIO_ASR, 0x0000000f);
325			PIOA_WRITE(PIO_PDR, 0x0000000f);
326		}
327		break;
328
329	case PID_SPI1:
330		if (enable) {
331			PIOB_WRITE(PIO_ASR, 0x0000000f);
332			PIOB_WRITE(PIO_PDR, 0x0000000f);
333		}
334		break;
335	}
336	(*old_at91bus_tag->peripheral_clock)(pid, enable);
337}
338
339
340static void mmnet_device_register(device_t dev, void *aux)
341{
342#if 0
343	if (device_is_a(dev, "at91semac")) {
344		// propagate mac address from u-boot
345	}
346#endif
347}
348