1 /*
2 * Board setup routines for the Buffalo Linkstation / Kurobox Platform.
3 *
4 * Copyright (C) 2006 G. Liakhovetski (g.liakhovetski@gmx.de)
5 *
6 * Based on sandpoint.c by Mark A. Greer
7 *
8 * This file is licensed under the terms of the GNU General Public License
9 * version 2. This program is licensed "as is" without any warranty of
10 * any kind, whether express or implied.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/initrd.h>
15 #include <linux/of_platform.h>
16
17 #include <asm/time.h>
18 #include <asm/prom.h>
19 #include <asm/mpic.h>
20 #include <asm/pci-bridge.h>
21
22 #include "mpc10x.h"
23
24 static const struct of_device_id of_bus_ids[] __initconst = {
25 { .type = "soc", },
26 { .compatible = "simple-bus", },
27 {},
28 };
29
declare_of_platform_devices(void)30 static int __init declare_of_platform_devices(void)
31 {
32 of_platform_bus_probe(NULL, of_bus_ids, NULL);
33 return 0;
34 }
35 machine_device_initcall(linkstation, declare_of_platform_devices);
36
linkstation_add_bridge(struct device_node * dev)37 static int __init linkstation_add_bridge(struct device_node *dev)
38 {
39 #ifdef CONFIG_PCI
40 int len;
41 struct pci_controller *hose;
42 const int *bus_range;
43
44 printk("Adding PCI host bridge %pOF\n", dev);
45
46 bus_range = of_get_property(dev, "bus-range", &len);
47 if (bus_range == NULL || len < 2 * sizeof(int))
48 printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
49 " bus 0\n", dev);
50
51 hose = pcibios_alloc_controller(dev);
52 if (hose == NULL)
53 return -ENOMEM;
54 hose->first_busno = bus_range ? bus_range[0] : 0;
55 hose->last_busno = bus_range ? bus_range[1] : 0xff;
56 setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);
57
58 /* Interpret the "ranges" property */
59 /* This also maps the I/O region and sets isa_io/mem_base */
60 pci_process_bridge_OF_ranges(hose, dev, 1);
61 #endif
62 return 0;
63 }
64
linkstation_setup_arch(void)65 static void __init linkstation_setup_arch(void)
66 {
67 struct device_node *np;
68
69 /* Lookup PCI host bridges */
70 for_each_compatible_node(np, "pci", "mpc10x-pci")
71 linkstation_add_bridge(np);
72
73 printk(KERN_INFO "BUFFALO Network Attached Storage Series\n");
74 printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n");
75 }
76
77 /*
78 * Interrupt setup and service. Interrupts on the linkstation come
79 * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
80 */
linkstation_init_IRQ(void)81 static void __init linkstation_init_IRQ(void)
82 {
83 struct mpic *mpic;
84
85 mpic = mpic_alloc(NULL, 0, 0, 4, 0, " EPIC ");
86 BUG_ON(mpic == NULL);
87
88 /* PCI IRQs */
89 mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);
90
91 /* I2C */
92 mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);
93
94 /* ttyS0, ttyS1 */
95 mpic_assign_isu(mpic, 2, mpic->paddr + 0x11100);
96
97 mpic_init(mpic);
98 }
99
100 extern void avr_uart_configure(void);
101 extern void avr_uart_send(const char);
102
linkstation_restart(char * cmd)103 static void __noreturn linkstation_restart(char *cmd)
104 {
105 local_irq_disable();
106
107 /* Reset system via AVR */
108 avr_uart_configure();
109 /* Send reboot command */
110 avr_uart_send('C');
111
112 for(;;) /* Spin until reset happens */
113 avr_uart_send('G'); /* "kick" */
114 }
115
linkstation_power_off(void)116 static void __noreturn linkstation_power_off(void)
117 {
118 local_irq_disable();
119
120 /* Power down system via AVR */
121 avr_uart_configure();
122 /* send shutdown command */
123 avr_uart_send('E');
124
125 for(;;) /* Spin until power-off happens */
126 avr_uart_send('G'); /* "kick" */
127 /* NOTREACHED */
128 }
129
linkstation_halt(void)130 static void __noreturn linkstation_halt(void)
131 {
132 linkstation_power_off();
133 /* NOTREACHED */
134 }
135
linkstation_show_cpuinfo(struct seq_file * m)136 static void linkstation_show_cpuinfo(struct seq_file *m)
137 {
138 seq_printf(m, "vendor\t\t: Buffalo Technology\n");
139 seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n");
140 }
141
linkstation_probe(void)142 static int __init linkstation_probe(void)
143 {
144 if (!of_machine_is_compatible("linkstation"))
145 return 0;
146
147 pm_power_off = linkstation_power_off;
148
149 return 1;
150 }
151
define_machine(linkstation)152 define_machine(linkstation){
153 .name = "Buffalo Linkstation",
154 .probe = linkstation_probe,
155 .setup_arch = linkstation_setup_arch,
156 .init_IRQ = linkstation_init_IRQ,
157 .show_cpuinfo = linkstation_show_cpuinfo,
158 .get_irq = mpic_get_irq,
159 .restart = linkstation_restart,
160 .halt = linkstation_halt,
161 .calibrate_decr = generic_calibrate_decr,
162 };
163
