Merge ../linux-2.6
[linux-2.6] / arch / powerpc / platforms / 83xx / mpc834x_sys.c
1 /*
2  * arch/powerpc/platforms/83xx/mpc834x_sys.c
3  *
4  * MPC834x SYS board specific routines
5  *
6  * Maintainer: Kumar Gala <galak@kernel.crashing.org>
7  *
8  * This program is free software; you can redistribute  it and/or modify it
9  * under  the terms of  the GNU General  Public License as published by the
10  * Free Software Foundation;  either version 2 of the  License, or (at your
11  * option) any later version.
12  */
13
14 #include <linux/config.h>
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/errno.h>
19 #include <linux/reboot.h>
20 #include <linux/pci.h>
21 #include <linux/kdev_t.h>
22 #include <linux/major.h>
23 #include <linux/console.h>
24 #include <linux/delay.h>
25 #include <linux/seq_file.h>
26 #include <linux/root_dev.h>
27
28 #include <asm/system.h>
29 #include <asm/atomic.h>
30 #include <asm/time.h>
31 #include <asm/io.h>
32 #include <asm/machdep.h>
33 #include <asm/ipic.h>
34 #include <asm/bootinfo.h>
35 #include <asm/irq.h>
36 #include <asm/prom.h>
37 #include <asm/udbg.h>
38 #include <sysdev/fsl_soc.h>
39
40 #include "mpc83xx.h"
41
42 #ifndef CONFIG_PCI
43 unsigned long isa_io_base = 0;
44 unsigned long isa_mem_base = 0;
45 #endif
46
47 #ifdef CONFIG_PCI
48 static int
49 mpc83xx_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
50 {
51         static char pci_irq_table[][4] =
52             /*
53              *      PCI IDSEL/INTPIN->INTLINE
54              *       A      B      C      D
55              */
56         {
57                 {PIRQA, PIRQB, PIRQC, PIRQD},   /* idsel 0x11 */
58                 {PIRQC, PIRQD, PIRQA, PIRQB},   /* idsel 0x12 */
59                 {PIRQD, PIRQA, PIRQB, PIRQC},   /* idsel 0x13 */
60                 {0, 0, 0, 0},
61                 {PIRQA, PIRQB, PIRQC, PIRQD},   /* idsel 0x15 */
62                 {PIRQD, PIRQA, PIRQB, PIRQC},   /* idsel 0x16 */
63                 {PIRQC, PIRQD, PIRQA, PIRQB},   /* idsel 0x17 */
64                 {PIRQB, PIRQC, PIRQD, PIRQA},   /* idsel 0x18 */
65                 {0, 0, 0, 0},                   /* idsel 0x19 */
66                 {0, 0, 0, 0},                   /* idsel 0x20 */
67         };
68
69         const long min_idsel = 0x11, max_idsel = 0x20, irqs_per_slot = 4;
70         return PCI_IRQ_TABLE_LOOKUP;
71 }
72 #endif                          /* CONFIG_PCI */
73
74 /* ************************************************************************
75  *
76  * Setup the architecture
77  *
78  */
79 static void __init mpc834x_sys_setup_arch(void)
80 {
81         struct device_node *np;
82
83         if (ppc_md.progress)
84                 ppc_md.progress("mpc834x_sys_setup_arch()", 0);
85
86         np = of_find_node_by_type(NULL, "cpu");
87         if (np != 0) {
88                 unsigned int *fp =
89                     (int *)get_property(np, "clock-frequency", NULL);
90                 if (fp != 0)
91                         loops_per_jiffy = *fp / HZ;
92                 else
93                         loops_per_jiffy = 50000000 / HZ;
94                 of_node_put(np);
95         }
96 #ifdef CONFIG_PCI
97         for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
98                 add_bridge(np);
99
100         ppc_md.pci_swizzle = common_swizzle;
101         ppc_md.pci_map_irq = mpc83xx_map_irq;
102         ppc_md.pci_exclude_device = mpc83xx_exclude_device;
103 #endif
104
105 #ifdef  CONFIG_ROOT_NFS
106         ROOT_DEV = Root_NFS;
107 #else
108         ROOT_DEV = Root_HDA1;
109 #endif
110 }
111
112 void __init mpc834x_sys_init_IRQ(void)
113 {
114         u8 senses[8] = {
115                 0,                      /* EXT 0 */
116                 IRQ_SENSE_LEVEL,        /* EXT 1 */
117                 IRQ_SENSE_LEVEL,        /* EXT 2 */
118                 0,                      /* EXT 3 */
119 #ifdef CONFIG_PCI
120                 IRQ_SENSE_LEVEL,        /* EXT 4 */
121                 IRQ_SENSE_LEVEL,        /* EXT 5 */
122                 IRQ_SENSE_LEVEL,        /* EXT 6 */
123                 IRQ_SENSE_LEVEL,        /* EXT 7 */
124 #else
125                 0,                      /* EXT 4 */
126                 0,                      /* EXT 5 */
127                 0,                      /* EXT 6 */
128                 0,                      /* EXT 7 */
129 #endif
130         };
131
132         ipic_init(get_immrbase() + 0x00700, 0, 0, senses, 8);
133
134         /* Initialize the default interrupt mapping priorities,
135          * in case the boot rom changed something on us.
136          */
137         ipic_set_default_priority();
138 }
139
140 #if defined(CONFIG_I2C_MPC) && defined(CONFIG_SENSORS_DS1374)
141 extern ulong ds1374_get_rtc_time(void);
142 extern int ds1374_set_rtc_time(ulong);
143
144 static int __init mpc834x_rtc_hookup(void)
145 {
146         struct timespec tv;
147
148         ppc_md.get_rtc_time = ds1374_get_rtc_time;
149         ppc_md.set_rtc_time = ds1374_set_rtc_time;
150
151         tv.tv_nsec = 0;
152         tv.tv_sec = (ppc_md.get_rtc_time) ();
153         do_settimeofday(&tv);
154
155         return 0;
156 }
157
158 late_initcall(mpc834x_rtc_hookup);
159 #endif
160
161 void __init platform_init(void)
162 {
163         /* setup the PowerPC module struct */
164         ppc_md.setup_arch = mpc834x_sys_setup_arch;
165
166         ppc_md.init_IRQ = mpc834x_sys_init_IRQ;
167         ppc_md.get_irq = ipic_get_irq;
168
169         ppc_md.restart = mpc83xx_restart;
170
171         ppc_md.time_init = mpc83xx_time_init;
172         ppc_md.set_rtc_time = NULL;
173         ppc_md.get_rtc_time = NULL;
174         ppc_md.calibrate_decr = generic_calibrate_decr;
175
176         ppc_md.progress = udbg_progress;
177
178         if (ppc_md.progress)
179                 ppc_md.progress("mpc834x_sys_init(): exit", 0);
180
181         return;
182 }