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
bcm63xx_machine_halt(void)24 void bcm63xx_machine_halt(void)
25 {
26 printk(KERN_INFO "System halted\n");
27 while (1)
28 ;
29 }
30
bcm6348_a1_reboot(void)31 static void bcm6348_a1_reboot(void)
32 {
33 u32 reg;
34
35 /* soft reset all blocks */
36 printk(KERN_INFO "soft-resetting all blocks ...\n");
37 reg = bcm_perf_readl(PERF_SOFTRESET_REG);
38 reg &= ~SOFTRESET_6348_ALL;
39 bcm_perf_writel(reg, PERF_SOFTRESET_REG);
40 mdelay(10);
41
42 reg = bcm_perf_readl(PERF_SOFTRESET_REG);
43 reg |= SOFTRESET_6348_ALL;
44 bcm_perf_writel(reg, PERF_SOFTRESET_REG);
45 mdelay(10);
46
47 /* Jump to the power on address. */
48 printk(KERN_INFO "jumping to reset vector.\n");
49 /* set high vectors (base at 0xbfc00000 */
50 set_c0_status(ST0_BEV | ST0_ERL);
51 /* run uncached in kseg0 */
52 change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
53 __flush_cache_all();
54 /* remove all wired TLB entries */
55 write_c0_wired(0);
56 __asm__ __volatile__(
57 "jr\t%0"
58 :
59 : "r" (0xbfc00000));
60 while (1)
61 ;
62 }
63
bcm63xx_machine_reboot(void)64 void bcm63xx_machine_reboot(void)
65 {
66 u32 reg, perf_regs[2] = { 0, 0 };
67 unsigned int i;
68
69 /* mask and clear all external irq */
70 switch (bcm63xx_get_cpu_id()) {
71 case BCM6338_CPU_ID:
72 perf_regs[0] = PERF_EXTIRQ_CFG_REG_6338;
73 break;
74 case BCM6348_CPU_ID:
75 perf_regs[0] = PERF_EXTIRQ_CFG_REG_6348;
76 break;
77 case BCM6358_CPU_ID:
78 perf_regs[0] = PERF_EXTIRQ_CFG_REG_6358;
79 break;
80 }
81
82 for (i = 0; i < 2; i++) {
83 reg = bcm_perf_readl(perf_regs[i]);
84 if (BCMCPU_IS_6348()) {
85 reg &= ~EXTIRQ_CFG_MASK_ALL_6348;
86 reg |= EXTIRQ_CFG_CLEAR_ALL_6348;
87 } else {
88 reg &= ~EXTIRQ_CFG_MASK_ALL;
89 reg |= EXTIRQ_CFG_CLEAR_ALL;
90 }
91 bcm_perf_writel(reg, perf_regs[i]);
92 }
93
94 if (BCMCPU_IS_6348() && (bcm63xx_get_cpu_rev() == 0xa1))
95 bcm6348_a1_reboot();
96
97 printk(KERN_INFO "triggering watchdog soft-reset...\n");
98 reg = bcm_perf_readl(PERF_SYS_PLL_CTL_REG);
99 reg |= SYS_PLL_SOFT_RESET;
100 bcm_perf_writel(reg, PERF_SYS_PLL_CTL_REG);
101 while (1)
102 ;
103 }
104
__bcm63xx_machine_reboot(char * p)105 static void __bcm63xx_machine_reboot(char *p)
106 {
107 bcm63xx_machine_reboot();
108 }
109
110 /*
111 * return system type in /proc/cpuinfo
112 */
get_system_type(void)113 const char *get_system_type(void)
114 {
115 static char buf[128];
116 snprintf(buf, sizeof(buf), "bcm63xx/%s (0x%04x/0x%04X)",
117 board_get_name(),
118 bcm63xx_get_cpu_id(), bcm63xx_get_cpu_rev());
119 return buf;
120 }
121
plat_time_init(void)122 void __init plat_time_init(void)
123 {
124 mips_hpt_frequency = bcm63xx_get_cpu_freq() / 2;
125 }
126
plat_mem_setup(void)127 void __init plat_mem_setup(void)
128 {
129 add_memory_region(0, bcm63xx_get_memory_size(), BOOT_MEM_RAM);
130
131 _machine_halt = bcm63xx_machine_halt;
132 _machine_restart = __bcm63xx_machine_reboot;
133 pm_power_off = bcm63xx_machine_halt;
134
135 set_io_port_base(0);
136 ioport_resource.start = 0;
137 ioport_resource.end = ~0;
138
139 board_setup();
140 }
141
bcm63xx_register_devices(void)142 int __init bcm63xx_register_devices(void)
143 {
144 return board_register_devices();
145 }
146
147 device_initcall(bcm63xx_register_devices);
148