1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
7 */
8
9#include <linux/init.h>
10#include <linux/kernel.h>
11#include <linux/delay.h>
12#include <linux/bootmem.h>
13#include <linux/ioport.h>
14#include <linux/pm.h>
15#include <asm/bootinfo.h>
16#include <asm/time.h>
17#include <asm/reboot.h>
18#include <asm/cacheflush.h>
19#include <bcm63xx_board.h>
20#include <bcm63xx_cpu.h>
21#include <bcm63xx_regs.h>
22#include <bcm63xx_io.h>
23#include <bcm63xx_gpio.h>
24
25void bcm63xx_machine_halt(void)
26{
27	pr_info("System halted\n");
28	while (1)
29		;
30}
31
32static void bcm6348_a1_reboot(void)
33{
34	u32 reg;
35
36	/* soft reset all blocks */
37	pr_info("soft-resetting all blocks ...\n");
38	reg = bcm_perf_readl(PERF_SOFTRESET_REG);
39	reg &= ~SOFTRESET_6348_ALL;
40	bcm_perf_writel(reg, PERF_SOFTRESET_REG);
41	mdelay(10);
42
43	reg = bcm_perf_readl(PERF_SOFTRESET_REG);
44	reg |= SOFTRESET_6348_ALL;
45	bcm_perf_writel(reg, PERF_SOFTRESET_REG);
46	mdelay(10);
47
48	/* Jump to the power on address. */
49	pr_info("jumping to reset vector.\n");
50	/* set high vectors (base at 0xbfc00000 */
51	set_c0_status(ST0_BEV | ST0_ERL);
52	/* run uncached in kseg0 */
53	change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
54	__flush_cache_all();
55	/* remove all wired TLB entries */
56	write_c0_wired(0);
57	__asm__ __volatile__(
58		"jr\t%0"
59		:
60		: "r" (0xbfc00000));
61	while (1)
62		;
63}
64
65void bcm63xx_machine_reboot(void)
66{
67	u32 reg, perf_regs[2] = { 0, 0 };
68	unsigned int i;
69
70	/* mask and clear all external irq */
71	switch (bcm63xx_get_cpu_id()) {
72	case BCM3368_CPU_ID:
73		perf_regs[0] = PERF_EXTIRQ_CFG_REG_3368;
74		break;
75	case BCM6328_CPU_ID:
76		perf_regs[0] = PERF_EXTIRQ_CFG_REG_6328;
77		break;
78	case BCM6338_CPU_ID:
79		perf_regs[0] = PERF_EXTIRQ_CFG_REG_6338;
80		break;
81	case BCM6345_CPU_ID:
82		perf_regs[0] = PERF_EXTIRQ_CFG_REG_6345;
83		break;
84	case BCM6348_CPU_ID:
85		perf_regs[0] = PERF_EXTIRQ_CFG_REG_6348;
86		break;
87	case BCM6358_CPU_ID:
88		perf_regs[0] = PERF_EXTIRQ_CFG_REG_6358;
89		break;
90	case BCM6362_CPU_ID:
91		perf_regs[0] = PERF_EXTIRQ_CFG_REG_6362;
92		break;
93	}
94
95	for (i = 0; i < 2; i++) {
96		if (!perf_regs[i])
97			break;
98
99		reg = bcm_perf_readl(perf_regs[i]);
100		if (BCMCPU_IS_6348()) {
101			reg &= ~EXTIRQ_CFG_MASK_ALL_6348;
102			reg |= EXTIRQ_CFG_CLEAR_ALL_6348;
103		} else {
104			reg &= ~EXTIRQ_CFG_MASK_ALL;
105			reg |= EXTIRQ_CFG_CLEAR_ALL;
106		}
107		bcm_perf_writel(reg, perf_regs[i]);
108	}
109
110	if (BCMCPU_IS_6348() && (bcm63xx_get_cpu_rev() == 0xa1))
111		bcm6348_a1_reboot();
112
113	pr_info("triggering watchdog soft-reset...\n");
114	if (BCMCPU_IS_6328()) {
115		bcm_wdt_writel(1, WDT_SOFTRESET_REG);
116	} else {
117		reg = bcm_perf_readl(PERF_SYS_PLL_CTL_REG);
118		reg |= SYS_PLL_SOFT_RESET;
119		bcm_perf_writel(reg, PERF_SYS_PLL_CTL_REG);
120	}
121	while (1)
122		;
123}
124
125static void __bcm63xx_machine_reboot(char *p)
126{
127	bcm63xx_machine_reboot();
128}
129
130/*
131 * return system type in /proc/cpuinfo
132 */
133const char *get_system_type(void)
134{
135	static char buf[128];
136	snprintf(buf, sizeof(buf), "bcm63xx/%s (0x%04x/0x%02X)",
137		 board_get_name(),
138		 bcm63xx_get_cpu_id(), bcm63xx_get_cpu_rev());
139	return buf;
140}
141
142void __init plat_time_init(void)
143{
144	mips_hpt_frequency = bcm63xx_get_cpu_freq() / 2;
145}
146
147void __init plat_mem_setup(void)
148{
149	add_memory_region(0, bcm63xx_get_memory_size(), BOOT_MEM_RAM);
150
151	_machine_halt = bcm63xx_machine_halt;
152	_machine_restart = __bcm63xx_machine_reboot;
153	pm_power_off = bcm63xx_machine_halt;
154
155	set_io_port_base(0);
156	ioport_resource.start = 0;
157	ioport_resource.end = ~0;
158
159	board_setup();
160}
161
162int __init bcm63xx_register_devices(void)
163{
164	/* register gpiochip */
165	bcm63xx_gpio_init();
166
167	return board_register_devices();
168}
169
170arch_initcall(bcm63xx_register_devices);
171