tegra124_machdep.c revision 298627 
1/*-
2 * Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#define	_ARM32_BUS_DMA_PRIVATE
28#include "opt_platform.h"
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: head/sys/arm/nvidia/tegra124/tegra124_machdep.c 298627 2016-04-26 11:53:37Z br $");
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/bus.h>
36#include <sys/reboot.h>
37#include <sys/devmap.h>
38
39#include <vm/vm.h>
40
41#include <machine/bus.h>
42#include <machine/fdt.h>
43#include <machine/intr.h>
44#include <machine/machdep.h>
45#include <machine/platformvar.h>
46
47#include <dev/fdt/fdt_common.h>
48#include <dev/ofw/openfirm.h>
49
50#include <arm/nvidia/tegra124/tegra124_mp.h>
51
52#include "platform_if.h"
53
54#define	PMC_PHYSBASE		0x7000e400
55#define	PMC_SIZE		0x400
56#define	PMC_CONTROL_REG		0x0
57#define	PMC_SCRATCH0		0x50
58#define	 PMC_SCRATCH0_MODE_RECOVERY	(1 << 31)
59#define	 PMC_SCRATCH0_MODE_BOOTLOADER	(1 << 30)
60#define	 PMC_SCRATCH0_MODE_RCM		(1 << 1)
61#define	 PMC_SCRATCH0_MODE_MASK		(PMC_SCRATCH0_MODE_RECOVERY | \
62					PMC_SCRATCH0_MODE_BOOTLOADER | \
63					PMC_SCRATCH0_MODE_RCM)
64
65struct fdt_fixup_entry fdt_fixup_table[] = {
66	{ NULL, NULL }
67};
68
69struct arm32_dma_range *
70bus_dma_get_range(void)
71{
72
73	return (NULL);
74}
75
76int
77bus_dma_get_range_nb(void)
78{
79
80	return (0);
81}
82
83static vm_offset_t
84tegra124_lastaddr(platform_t plat)
85{
86
87	return (devmap_lastaddr());
88}
89
90static int
91tegra124_attach(platform_t plat)
92{
93
94	return (0);
95}
96
97static void
98tegra124_late_init(platform_t plat)
99{
100
101}
102
103/*
104 * Set up static device mappings.
105 *
106 */
107static int
108tegra124_devmap_init(platform_t plat)
109{
110
111	devmap_add_entry(0x70000000, 0x01000000);
112	return (0);
113}
114
115void
116cpu_reset(void)
117{
118	bus_space_handle_t pmc;
119	uint32_t reg;
120
121	printf("Resetting...\n");
122	bus_space_map(fdtbus_bs_tag, PMC_PHYSBASE, PMC_SIZE, 0, &pmc);
123
124	reg = bus_space_read_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0);
125	reg &= PMC_SCRATCH0_MODE_MASK;
126	bus_space_write_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0,
127	   reg | PMC_SCRATCH0_MODE_BOOTLOADER); 	/* boot to bootloader */
128	bus_space_read_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0);
129
130	reg = bus_space_read_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG);
131	spinlock_enter();
132	dsb();
133	bus_space_write_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG, reg | 0x10);
134	bus_space_read_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG);
135	while(1)
136		;
137
138}
139
140/*
141 * Early putc routine for EARLY_PRINTF support.  To use, add to kernel config:
142 *   option SOCDEV_PA=0x02000000
143 *   option SOCDEV_VA=0x02000000
144 *   option EARLY_PRINTF
145 */
146#if 0
147static void
148tegra124_early_putc(int c)
149{
150	volatile uint32_t * UART_STAT_REG = (uint32_t *)0x02020098;
151	volatile uint32_t * UART_TX_REG   = (uint32_t *)0x02020040;
152	const uint32_t      UART_TXRDY    = (1 << 3);
153
154	while ((*UART_STAT_REG & UART_TXRDY) == 0)
155		continue;
156	*UART_TX_REG = c;
157}
158early_putc_t *early_putc = tegra124_early_putc;
159#endif
160
161static platform_method_t tegra124_methods[] = {
162	PLATFORMMETHOD(platform_attach,		tegra124_attach),
163	PLATFORMMETHOD(platform_lastaddr,	tegra124_lastaddr),
164	PLATFORMMETHOD(platform_devmap_init,	tegra124_devmap_init),
165	PLATFORMMETHOD(platform_late_init,	tegra124_late_init),
166#ifdef SMP
167	PLATFORMMETHOD(platform_mp_start_ap,	tegra124_mp_start_ap),
168	PLATFORMMETHOD(platform_mp_setmaxid,	tegra124_mp_setmaxid),
169#endif
170	PLATFORMMETHOD_END,
171};
172
173FDT_PLATFORM_DEF(tegra124, "Nvidia Jetson-TK1", 0, "nvidia,jetson-tk1");
174