2ca7be65c2d2c17b5bde858b2c2940aecfc71989
[linux-2.6.git] / arch / powerpc / platforms / embedded6xx / linkstation.c
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/mtd/physmap.h>
16 #include <linux/of_platform.h>
17
18 #include <asm/time.h>
19 #include <asm/prom.h>
20 #include <asm/mpic.h>
21 #include <asm/pci-bridge.h>
22
23 #include "mpc10x.h"
24
25 static struct mtd_partition linkstation_physmap_partitions[] = {
26         {
27                 .name   = "mtd_firmimg",
28                 .offset = 0x000000,
29                 .size   = 0x300000,
30         },
31         {
32                 .name   = "mtd_bootcode",
33                 .offset = 0x300000,
34                 .size   = 0x070000,
35         },
36         {
37                 .name   = "mtd_status",
38                 .offset = 0x370000,
39                 .size   = 0x010000,
40         },
41         {
42                 .name   = "mtd_conf",
43                 .offset = 0x380000,
44                 .size   = 0x080000,
45         },
46         {
47                 .name   = "mtd_allflash",
48                 .offset = 0x000000,
49                 .size   = 0x400000,
50         },
51         {
52                 .name   = "mtd_data",
53                 .offset = 0x310000,
54                 .size   = 0x0f0000,
55         },
56 };
57
58 static __initdata struct of_device_id of_bus_ids[] = {
59         { .type = "soc", },
60         { .compatible = "simple-bus", },
61         {},
62 };
63
64 static int __init declare_of_platform_devices(void)
65 {
66         of_platform_bus_probe(NULL, of_bus_ids, NULL);
67         return 0;
68 }
69 machine_device_initcall(linkstation, declare_of_platform_devices);
70
71 static int __init linkstation_add_bridge(struct device_node *dev)
72 {
73 #ifdef CONFIG_PCI
74         int len;
75         struct pci_controller *hose;
76         const int *bus_range;
77
78         printk("Adding PCI host bridge %s\n", dev->full_name);
79
80         bus_range = of_get_property(dev, "bus-range", &len);
81         if (bus_range == NULL || len < 2 * sizeof(int))
82                 printk(KERN_WARNING "Can't get bus-range for %s, assume"
83                                 " bus 0\n", dev->full_name);
84
85         hose = pcibios_alloc_controller(dev);
86         if (hose == NULL)
87                 return -ENOMEM;
88         hose->first_busno = bus_range ? bus_range[0] : 0;
89         hose->last_busno = bus_range ? bus_range[1] : 0xff;
90         setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);
91
92         /* Interpret the "ranges" property */
93         /* This also maps the I/O region and sets isa_io/mem_base */
94         pci_process_bridge_OF_ranges(hose, dev, 1);
95 #endif
96         return 0;
97 }
98
99 static void __init linkstation_setup_arch(void)
100 {
101         struct device_node *np;
102 #ifdef CONFIG_MTD_PHYSMAP
103         physmap_set_partitions(linkstation_physmap_partitions,
104                                ARRAY_SIZE(linkstation_physmap_partitions));
105 #endif
106
107         /* Lookup PCI host bridges */
108         for_each_compatible_node(np, "pci", "mpc10x-pci")
109                 linkstation_add_bridge(np);
110
111         printk(KERN_INFO "BUFFALO Network Attached Storage Series\n");
112         printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n");
113 }
114
115 /*
116  * Interrupt setup and service.  Interrupts on the linkstation come
117  * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
118  */
119 static void __init linkstation_init_IRQ(void)
120 {
121         struct mpic *mpic;
122         struct device_node *dnp;
123         const u32 *prop;
124         int size;
125         phys_addr_t paddr;
126
127         dnp = of_find_node_by_type(NULL, "open-pic");
128         if (dnp == NULL)
129                 return;
130
131         prop = of_get_property(dnp, "reg", &size);
132         paddr = (phys_addr_t)of_translate_address(dnp, prop);
133
134         mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET, 4, 32, " EPIC     ");
135         BUG_ON(mpic == NULL);
136
137         /* PCI IRQs */
138         mpic_assign_isu(mpic, 0, paddr + 0x10200);
139
140         /* I2C */
141         mpic_assign_isu(mpic, 1, paddr + 0x11000);
142
143         /* ttyS0, ttyS1 */
144         mpic_assign_isu(mpic, 2, paddr + 0x11100);
145
146         mpic_init(mpic);
147 }
148
149 extern void avr_uart_configure(void);
150 extern void avr_uart_send(const char);
151
152 static void linkstation_restart(char *cmd)
153 {
154         local_irq_disable();
155
156         /* Reset system via AVR */
157         avr_uart_configure();
158         /* Send reboot command */
159         avr_uart_send('C');
160
161         for(;;)  /* Spin until reset happens */
162                 avr_uart_send('G');     /* "kick" */
163 }
164
165 static void linkstation_power_off(void)
166 {
167         local_irq_disable();
168
169         /* Power down system via AVR */
170         avr_uart_configure();
171         /* send shutdown command */
172         avr_uart_send('E');
173
174         for(;;)  /* Spin until power-off happens */
175                 avr_uart_send('G');     /* "kick" */
176         /* NOTREACHED */
177 }
178
179 static void linkstation_halt(void)
180 {
181         linkstation_power_off();
182         /* NOTREACHED */
183 }
184
185 static void linkstation_show_cpuinfo(struct seq_file *m)
186 {
187         seq_printf(m, "vendor\t\t: Buffalo Technology\n");
188         seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n");
189 }
190
191 static int __init linkstation_probe(void)
192 {
193         unsigned long root;
194
195         root = of_get_flat_dt_root();
196
197         if (!of_flat_dt_is_compatible(root, "linkstation"))
198                 return 0;
199         return 1;
200 }
201
202 define_machine(linkstation){
203         .name                   = "Buffalo Linkstation",
204         .probe                  = linkstation_probe,
205         .setup_arch             = linkstation_setup_arch,
206         .init_IRQ               = linkstation_init_IRQ,
207         .show_cpuinfo           = linkstation_show_cpuinfo,
208         .get_irq                = mpic_get_irq,
209         .restart                = linkstation_restart,
210         .power_off              = linkstation_power_off,
211         .halt                   = linkstation_halt,
212         .calibrate_decr         = generic_calibrate_decr,
213 };