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