Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi...
[sfrench/cifs-2.6.git] / arch / mips / bcm63xx / setup.c
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
24 void bcm63xx_machine_halt(void)
25 {
26         printk(KERN_INFO "System halted\n");
27         while (1)
28                 ;
29 }
30
31 static void bcm6348_a1_reboot(void)
32 {
33         u32 reg;
34
35         /* soft reset all blocks */
36         printk(KERN_INFO "soft-reseting 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
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
105 static void __bcm63xx_machine_reboot(char *p)
106 {
107         bcm63xx_machine_reboot();
108 }
109
110 /*
111  * return system type in /proc/cpuinfo
112  */
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
122 void __init plat_time_init(void)
123 {
124         mips_hpt_frequency = bcm63xx_get_cpu_freq() / 2;
125 }
126
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
142 int __init bcm63xx_register_devices(void)
143 {
144         return board_register_devices();
145 }
146
147 device_initcall(bcm63xx_register_devices);