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04d76b93 GL |
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> | |
04d76b93 | 14 | #include <linux/initrd.h> |
22e181ba | 15 | #include <linux/of_platform.h> |
04d76b93 GL |
16 | |
17 | #include <asm/time.h> | |
18 | #include <asm/prom.h> | |
19 | #include <asm/mpic.h> | |
04d76b93 GL |
20 | #include <asm/pci-bridge.h> |
21 | ||
33d71d26 KG |
22 | #include "mpc10x.h" |
23 | ||
22e181ba GL |
24 | static __initdata struct of_device_id of_bus_ids[] = { |
25 | { .type = "soc", }, | |
26 | { .compatible = "simple-bus", }, | |
27 | {}, | |
28 | }; | |
29 | ||
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 | ||
09b55f76 | 37 | static int __init linkstation_add_bridge(struct device_node *dev) |
04d76b93 | 38 | { |
d6658408 | 39 | #ifdef CONFIG_PCI |
04d76b93 GL |
40 | int len; |
41 | struct pci_controller *hose; | |
e2eb6392 | 42 | const int *bus_range; |
04d76b93 GL |
43 | |
44 | printk("Adding PCI host bridge %s\n", dev->full_name); | |
45 | ||
e2eb6392 | 46 | bus_range = of_get_property(dev, "bus-range", &len); |
04d76b93 GL |
47 | if (bus_range == NULL || len < 2 * sizeof(int)) |
48 | printk(KERN_WARNING "Can't get bus-range for %s, assume" | |
49 | " bus 0\n", dev->full_name); | |
50 | ||
dbf8471f | 51 | hose = pcibios_alloc_controller(dev); |
04d76b93 GL |
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; | |
2e56ff20 | 56 | setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0); |
04d76b93 GL |
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); | |
d6658408 | 61 | #endif |
04d76b93 GL |
62 | return 0; |
63 | } | |
64 | ||
65 | static void __init linkstation_setup_arch(void) | |
66 | { | |
67 | struct device_node *np; | |
04d76b93 | 68 | |
04d76b93 | 69 | /* Lookup PCI host bridges */ |
c9438aff | 70 | for_each_compatible_node(np, "pci", "mpc10x-pci") |
09b55f76 | 71 | linkstation_add_bridge(np); |
04d76b93 GL |
72 | |
73 | printk(KERN_INFO "BUFFALO Network Attached Storage Series\n"); | |
74 | printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n"); | |
75 | } | |
76 | ||
77 | /* | |
33567a02 | 78 | * Interrupt setup and service. Interrupts on the linkstation come |
04d76b93 GL |
79 | * from the four PCI slots plus onboard 8241 devices: I2C, DUART. |
80 | */ | |
81 | static void __init linkstation_init_IRQ(void) | |
82 | { | |
83 | struct mpic *mpic; | |
84 | struct device_node *dnp; | |
e2eb6392 | 85 | const u32 *prop; |
04d76b93 GL |
86 | int size; |
87 | phys_addr_t paddr; | |
88 | ||
89 | dnp = of_find_node_by_type(NULL, "open-pic"); | |
90 | if (dnp == NULL) | |
91 | return; | |
92 | ||
e2eb6392 | 93 | prop = of_get_property(dnp, "reg", &size); |
04d76b93 GL |
94 | paddr = (phys_addr_t)of_translate_address(dnp, prop); |
95 | ||
96 | mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET, 4, 32, " EPIC "); | |
97 | BUG_ON(mpic == NULL); | |
98 | ||
99 | /* PCI IRQs */ | |
100 | mpic_assign_isu(mpic, 0, paddr + 0x10200); | |
101 | ||
102 | /* I2C */ | |
103 | mpic_assign_isu(mpic, 1, paddr + 0x11000); | |
104 | ||
105 | /* ttyS0, ttyS1 */ | |
106 | mpic_assign_isu(mpic, 2, paddr + 0x11100); | |
107 | ||
108 | mpic_init(mpic); | |
109 | } | |
110 | ||
111 | extern void avr_uart_configure(void); | |
112 | extern void avr_uart_send(const char); | |
113 | ||
114 | static void linkstation_restart(char *cmd) | |
115 | { | |
116 | local_irq_disable(); | |
117 | ||
118 | /* Reset system via AVR */ | |
119 | avr_uart_configure(); | |
120 | /* Send reboot command */ | |
121 | avr_uart_send('C'); | |
122 | ||
123 | for(;;) /* Spin until reset happens */ | |
124 | avr_uart_send('G'); /* "kick" */ | |
125 | } | |
126 | ||
127 | static void linkstation_power_off(void) | |
128 | { | |
129 | local_irq_disable(); | |
130 | ||
131 | /* Power down system via AVR */ | |
132 | avr_uart_configure(); | |
133 | /* send shutdown command */ | |
134 | avr_uart_send('E'); | |
135 | ||
136 | for(;;) /* Spin until power-off happens */ | |
137 | avr_uart_send('G'); /* "kick" */ | |
138 | /* NOTREACHED */ | |
139 | } | |
140 | ||
141 | static void linkstation_halt(void) | |
142 | { | |
143 | linkstation_power_off(); | |
144 | /* NOTREACHED */ | |
145 | } | |
146 | ||
147 | static void linkstation_show_cpuinfo(struct seq_file *m) | |
148 | { | |
149 | seq_printf(m, "vendor\t\t: Buffalo Technology\n"); | |
150 | seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n"); | |
151 | } | |
152 | ||
153 | static int __init linkstation_probe(void) | |
154 | { | |
155 | unsigned long root; | |
156 | ||
157 | root = of_get_flat_dt_root(); | |
158 | ||
159 | if (!of_flat_dt_is_compatible(root, "linkstation")) | |
160 | return 0; | |
161 | return 1; | |
162 | } | |
163 | ||
164 | define_machine(linkstation){ | |
165 | .name = "Buffalo Linkstation", | |
166 | .probe = linkstation_probe, | |
167 | .setup_arch = linkstation_setup_arch, | |
168 | .init_IRQ = linkstation_init_IRQ, | |
169 | .show_cpuinfo = linkstation_show_cpuinfo, | |
170 | .get_irq = mpic_get_irq, | |
171 | .restart = linkstation_restart, | |
172 | .power_off = linkstation_power_off, | |
173 | .halt = linkstation_halt, | |
174 | .calibrate_decr = generic_calibrate_decr, | |
175 | }; |