diff options
Diffstat (limited to 'arch/powerpc/platforms/52xx/lite5200.c')
-rw-r--r-- | arch/powerpc/platforms/52xx/lite5200.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/52xx/lite5200.c b/arch/powerpc/platforms/52xx/lite5200.c new file mode 100644 index 000000000000..eaff71e74fb0 --- /dev/null +++ b/arch/powerpc/platforms/52xx/lite5200.c | |||
@@ -0,0 +1,160 @@ | |||
1 | /* | ||
2 | * Freescale Lite5200 board support | ||
3 | * | ||
4 | * Written by: Grant Likely <grant.likely@secretlab.ca> | ||
5 | * | ||
6 | * Copyright (C) Secret Lab Technologies Ltd. 2006. All rights reserved. | ||
7 | * Copyright (C) Freescale Semicondutor, Inc. 2006. All rights reserved. | ||
8 | * | ||
9 | * Description: | ||
10 | * This program is free software; you can redistribute it and/or modify it | ||
11 | * under the terms of the GNU General Public License as published by the | ||
12 | * Free Software Foundation; either version 2 of the License, or (at your | ||
13 | * option) any later version. | ||
14 | */ | ||
15 | |||
16 | #undef DEBUG | ||
17 | |||
18 | #include <linux/stddef.h> | ||
19 | #include <linux/kernel.h> | ||
20 | #include <linux/init.h> | ||
21 | #include <linux/errno.h> | ||
22 | #include <linux/reboot.h> | ||
23 | #include <linux/pci.h> | ||
24 | #include <linux/kdev_t.h> | ||
25 | #include <linux/major.h> | ||
26 | #include <linux/console.h> | ||
27 | #include <linux/delay.h> | ||
28 | #include <linux/seq_file.h> | ||
29 | #include <linux/root_dev.h> | ||
30 | #include <linux/initrd.h> | ||
31 | |||
32 | #include <asm/system.h> | ||
33 | #include <asm/atomic.h> | ||
34 | #include <asm/time.h> | ||
35 | #include <asm/io.h> | ||
36 | #include <asm/machdep.h> | ||
37 | #include <asm/ipic.h> | ||
38 | #include <asm/bootinfo.h> | ||
39 | #include <asm/irq.h> | ||
40 | #include <asm/prom.h> | ||
41 | #include <asm/udbg.h> | ||
42 | #include <sysdev/fsl_soc.h> | ||
43 | #include <asm/of_platform.h> | ||
44 | |||
45 | #include <asm/mpc52xx.h> | ||
46 | |||
47 | /* ************************************************************************ | ||
48 | * | ||
49 | * Setup the architecture | ||
50 | * | ||
51 | */ | ||
52 | |||
53 | static void __init | ||
54 | lite52xx_setup_cpu(void) | ||
55 | { | ||
56 | struct mpc52xx_gpio __iomem *gpio; | ||
57 | u32 port_config; | ||
58 | |||
59 | /* Map zones */ | ||
60 | gpio = mpc52xx_find_and_map("mpc52xx-gpio"); | ||
61 | if (!gpio) { | ||
62 | printk(KERN_ERR __FILE__ ": " | ||
63 | "Error while mapping GPIO register for port config. " | ||
64 | "Expect some abnormal behavior\n"); | ||
65 | goto error; | ||
66 | } | ||
67 | |||
68 | /* Set port config */ | ||
69 | port_config = in_be32(&gpio->port_config); | ||
70 | |||
71 | port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */ | ||
72 | |||
73 | port_config &= ~0x00007000; /* USB port : Differential mode */ | ||
74 | port_config |= 0x00001000; /* USB 1 only */ | ||
75 | |||
76 | port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */ | ||
77 | port_config |= 0x01000000; | ||
78 | |||
79 | pr_debug("port_config: old:%x new:%x\n", | ||
80 | in_be32(&gpio->port_config), port_config); | ||
81 | out_be32(&gpio->port_config, port_config); | ||
82 | |||
83 | /* Unmap zone */ | ||
84 | error: | ||
85 | iounmap(gpio); | ||
86 | } | ||
87 | |||
88 | static void __init lite52xx_setup_arch(void) | ||
89 | { | ||
90 | struct device_node *np; | ||
91 | |||
92 | if (ppc_md.progress) | ||
93 | ppc_md.progress("lite52xx_setup_arch()", 0); | ||
94 | |||
95 | np = of_find_node_by_type(NULL, "cpu"); | ||
96 | if (np) { | ||
97 | unsigned int *fp = | ||
98 | (int *)get_property(np, "clock-frequency", NULL); | ||
99 | if (fp != 0) | ||
100 | loops_per_jiffy = *fp / HZ; | ||
101 | else | ||
102 | loops_per_jiffy = 50000000 / HZ; | ||
103 | of_node_put(np); | ||
104 | } | ||
105 | |||
106 | /* CPU & Port mux setup */ | ||
107 | mpc52xx_setup_cpu(); /* Generic */ | ||
108 | lite52xx_setup_cpu(); /* Platorm specific */ | ||
109 | |||
110 | #ifdef CONFIG_BLK_DEV_INITRD | ||
111 | if (initrd_start) | ||
112 | ROOT_DEV = Root_RAM0; | ||
113 | else | ||
114 | #endif | ||
115 | #ifdef CONFIG_ROOT_NFS | ||
116 | ROOT_DEV = Root_NFS; | ||
117 | #else | ||
118 | ROOT_DEV = Root_HDA1; | ||
119 | #endif | ||
120 | |||
121 | } | ||
122 | |||
123 | void lite52xx_show_cpuinfo(struct seq_file *m) | ||
124 | { | ||
125 | struct device_node* np = of_find_all_nodes(NULL); | ||
126 | const char *model = NULL; | ||
127 | |||
128 | if (np) | ||
129 | model = get_property(np, "model", NULL); | ||
130 | |||
131 | seq_printf(m, "vendor\t\t: Freescale Semiconductor\n"); | ||
132 | seq_printf(m, "machine\t\t: %s\n", model ? model : "unknown"); | ||
133 | |||
134 | of_node_put(np); | ||
135 | } | ||
136 | |||
137 | /* | ||
138 | * Called very early, MMU is off, device-tree isn't unflattened | ||
139 | */ | ||
140 | static int __init lite52xx_probe(void) | ||
141 | { | ||
142 | unsigned long node = of_get_flat_dt_root(); | ||
143 | const char *model = of_get_flat_dt_prop(node, "model", NULL); | ||
144 | |||
145 | if (!of_flat_dt_is_compatible(node, "lite52xx")) | ||
146 | return 0; | ||
147 | pr_debug("%s board w/ mpc52xx found\n", model ? model : "unknown"); | ||
148 | |||
149 | return 1; | ||
150 | } | ||
151 | |||
152 | define_machine(lite52xx) { | ||
153 | .name = "lite52xx", | ||
154 | .probe = lite52xx_probe, | ||
155 | .setup_arch = lite52xx_setup_arch, | ||
156 | .init_IRQ = mpc52xx_init_irq, | ||
157 | .get_irq = mpc52xx_get_irq, | ||
158 | .show_cpuinfo = lite52xx_show_cpuinfo, | ||
159 | .calibrate_decr = generic_calibrate_decr, | ||
160 | }; | ||