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/mpic.h>
19 #include <asm/pci-bridge.h>
20
21 #include "mpc10x.h"
22
23 static const struct of_device_id of_bus_ids[] __initconst = {
24 { .type = "soc", },
25 { .compatible = "simple-bus", },
26 {},
27 };
28
29 static int __init declare_of_platform_devices(void)
30 {
31 of_platform_bus_probe(NULL, of_bus_ids, NULL);
32 return 0;
33 }
34 machine_device_initcall(linkstation, declare_of_platform_devices);
35
36 static int __init linkstation_add_bridge(struct device_node *dev)
37 {
38 #ifdef CONFIG_PCI
39 int len;
40 struct pci_controller *hose;
41 const int *bus_range;
42
43 printk("Adding PCI host bridge %pOF\n", dev);
44
45 bus_range = of_get_property(dev, "bus-range", &len);
46 if (bus_range == NULL || len < 2 * sizeof(int))
47 printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
48 " bus 0\n", dev);
49
50 hose = pcibios_alloc_controller(dev);
51 if (hose == NULL)
52 return -ENOMEM;
53 hose->first_busno = bus_range ? bus_range[0] : 0;
54 hose->last_busno = bus_range ? bus_range[1] : 0xff;
55 setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);
56
57 /* Interpret the "ranges" property */
58 /* This also maps the I/O region and sets isa_io/mem_base */
59 pci_process_bridge_OF_ranges(hose, dev, 1);
60 #endif
61 return 0;
62 }
63
64 static void __init linkstation_setup_arch(void)
65 {
66 printk(KERN_INFO "BUFFALO Network Attached Storage Series\n");
67 printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n");
68 }
69
70 static void __init linkstation_setup_pci(void)
71 {
72 struct device_node *np;
73
74 /* Lookup PCI host bridges */
75 for_each_compatible_node(np, "pci", "mpc10x-pci")
76 linkstation_add_bridge(np);
77 }
78
79 /*
80 * Interrupt setup and service. Interrupts on the linkstation come
81 * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
82 */
83 static void __init linkstation_init_IRQ(void)
84 {
85 struct mpic *mpic;
86
87 mpic = mpic_alloc(NULL, 0, 0, 4, 0, " EPIC ");
88 BUG_ON(mpic == NULL);
89
90 /* PCI IRQs */
91 mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);
92
93 /* I2C */
94 mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);
95
96 /* ttyS0, ttyS1 */
97 mpic_assign_isu(mpic, 2, mpic->paddr + 0x11100);
98
99 mpic_init(mpic);
100 }
101
102 static void __noreturn linkstation_restart(char *cmd)
103 {
104 local_irq_disable();
105
106 /* Reset system via AVR */
107 avr_uart_configure();
108 /* Send reboot command */
109 avr_uart_send('C');
110
111 for(;;) /* Spin until reset happens */
112 avr_uart_send('G'); /* "kick" */
113 }
114
115 static void __noreturn linkstation_power_off(void)
116 {
117 local_irq_disable();
118
119 /* Power down system via AVR */
120 avr_uart_configure();
121 /* send shutdown command */
122 avr_uart_send('E');
123
124 for(;;) /* Spin until power-off happens */
125 avr_uart_send('G'); /* "kick" */
126 /* NOTREACHED */
127 }
128
129 static void __noreturn linkstation_halt(void)
130 {
131 linkstation_power_off();
132 /* NOTREACHED */
133 }
134
135 static void linkstation_show_cpuinfo(struct seq_file *m)
136 {
137 seq_printf(m, "vendor\t\t: Buffalo Technology\n");
138 seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n");
139 }
140
141 static int __init linkstation_probe(void)
142 {
143 pm_power_off = linkstation_power_off;
144
145 return 1;
146 }
147
148 define_machine(linkstation){
149 .name = "Buffalo Linkstation",
150 .compatible = "linkstation",
151 .probe = linkstation_probe,
152 .setup_arch = linkstation_setup_arch,
153 .discover_phbs = linkstation_setup_pci,
154 .init_IRQ = linkstation_init_IRQ,
155 .show_cpuinfo = linkstation_show_cpuinfo,
156 .get_irq = mpic_get_irq,
157 .restart = linkstation_restart,
158 .halt = linkstation_halt,
159 };
160
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