Merge git://git.infradead.org/mtd-2.6
[linux-2.6] / arch / powerpc / platforms / 83xx / mpc837x_mds.c
1 /*
2  * arch/powerpc/platforms/83xx/mpc837x_mds.c
3  *
4  * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
5  *
6  * MPC837x MDS board specific routines
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/pci.h>
15 #include <linux/of.h>
16 #include <linux/of_platform.h>
17
18 #include <asm/time.h>
19 #include <asm/ipic.h>
20 #include <asm/udbg.h>
21 #include <asm/prom.h>
22 #include <sysdev/fsl_pci.h>
23
24 #include "mpc83xx.h"
25
26 #define BCSR12_USB_SER_MASK     0x8a
27 #define BCSR12_USB_SER_PIN      0x80
28 #define BCSR12_USB_SER_DEVICE   0x02
29 extern int mpc837x_usb_cfg(void);
30
31 static int mpc837xmds_usb_cfg(void)
32 {
33         struct device_node *np;
34         const void *phy_type, *mode;
35         void __iomem *bcsr_regs = NULL;
36         u8 bcsr12;
37         int ret;
38
39         ret = mpc837x_usb_cfg();
40         if (ret)
41                 return ret;
42         /* Map BCSR area */
43         np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
44         if (np) {
45                 bcsr_regs = of_iomap(np, 0);
46                 of_node_put(np);
47         }
48         if (!bcsr_regs)
49                 return -1;
50
51         np = of_find_node_by_name(NULL, "usb");
52         if (!np)
53                 return -ENODEV;
54         phy_type = of_get_property(np, "phy_type", NULL);
55         if (phy_type && !strcmp(phy_type, "ulpi")) {
56                 clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
57         } else if (phy_type && !strcmp(phy_type, "serial")) {
58                 mode = of_get_property(np, "dr_mode", NULL);
59                 bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
60                 bcsr12 |= BCSR12_USB_SER_PIN;
61                 if (mode && !strcmp(mode, "peripheral"))
62                         bcsr12 |= BCSR12_USB_SER_DEVICE;
63                 out_8(bcsr_regs + 12, bcsr12);
64         } else {
65                 printk(KERN_ERR "USB DR: unsupported PHY\n");
66         }
67
68         of_node_put(np);
69         iounmap(bcsr_regs);
70         return 0;
71 }
72
73 /* ************************************************************************
74  *
75  * Setup the architecture
76  *
77  */
78 static void __init mpc837x_mds_setup_arch(void)
79 {
80 #ifdef CONFIG_PCI
81         struct device_node *np;
82 #endif
83
84         if (ppc_md.progress)
85                 ppc_md.progress("mpc837x_mds_setup_arch()", 0);
86
87 #ifdef CONFIG_PCI
88         for_each_compatible_node(np, "pci", "fsl,mpc8349-pci") {
89                 if (!of_device_is_available(np)) {
90                         pr_warning("%s: disabled by the firmware.\n",
91                                    np->full_name);
92                         continue;
93                 }
94                 mpc83xx_add_bridge(np);
95         }
96 #endif
97         mpc837xmds_usb_cfg();
98 }
99
100 static struct of_device_id mpc837x_ids[] = {
101         { .type = "soc", },
102         { .compatible = "soc", },
103         { .compatible = "simple-bus", },
104         {},
105 };
106
107 static int __init mpc837x_declare_of_platform_devices(void)
108 {
109         /* Publish of_device */
110         of_platform_bus_probe(NULL, mpc837x_ids, NULL);
111
112         return 0;
113 }
114 machine_device_initcall(mpc837x_mds, mpc837x_declare_of_platform_devices);
115
116 static void __init mpc837x_mds_init_IRQ(void)
117 {
118         struct device_node *np;
119
120         np = of_find_compatible_node(NULL, NULL, "fsl,ipic");
121         if (!np)
122                 return;
123
124         ipic_init(np, 0);
125
126         /* Initialize the default interrupt mapping priorities,
127          * in case the boot rom changed something on us.
128          */
129         ipic_set_default_priority();
130 }
131
132 /*
133  * Called very early, MMU is off, device-tree isn't unflattened
134  */
135 static int __init mpc837x_mds_probe(void)
136 {
137         unsigned long root = of_get_flat_dt_root();
138
139         return of_flat_dt_is_compatible(root, "fsl,mpc837xmds");
140 }
141
142 define_machine(mpc837x_mds) {
143         .name                   = "MPC837x MDS",
144         .probe                  = mpc837x_mds_probe,
145         .setup_arch             = mpc837x_mds_setup_arch,
146         .init_IRQ               = mpc837x_mds_init_IRQ,
147         .get_irq                = ipic_get_irq,
148         .restart                = mpc83xx_restart,
149         .time_init              = mpc83xx_time_init,
150         .calibrate_decr         = generic_calibrate_decr,
151         .progress               = udbg_progress,
152 };