2 * Freescale Lite5200 board support
4 * Written by: Grant Likely <grant.likely@secretlab.ca>
6 * Copyright (C) Secret Lab Technologies Ltd. 2006. All rights reserved.
7 * Copyright (C) Freescale Semicondutor, Inc. 2006. All rights reserved.
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.
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>
32 #include <asm/system.h>
33 #include <asm/atomic.h>
36 #include <asm/machdep.h>
38 #include <asm/bootinfo.h>
42 #include <sysdev/fsl_soc.h>
44 #include <asm/qe_ic.h>
45 #include <asm/of_platform.h>
47 #include <asm/mpc52xx.h>
49 /* ************************************************************************
51 * Setup the architecture
56 lite52xx_setup_cpu(void)
58 struct mpc52xx_gpio __iomem *gpio;
62 gpio = mpc52xx_find_and_map("mpc52xx-gpio");
64 printk(KERN_ERR __FILE__ ": "
65 "Error while mapping GPIO register for port config. "
66 "Expect some abnormal behavior\n");
71 port_config = in_be32(&gpio->port_config);
73 port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */
75 port_config &= ~0x00007000; /* USB port : Differential mode */
76 port_config |= 0x00001000; /* USB 1 only */
78 port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */
79 port_config |= 0x01000000;
81 pr_debug("port_config: old:%x new:%x\n",
82 in_be32(&gpio->port_config), port_config);
83 out_be32(&gpio->port_config, port_config);
90 static void __init lite52xx_setup_arch(void)
92 struct device_node *np;
95 ppc_md.progress("lite52xx_setup_arch()", 0);
97 np = of_find_node_by_type(NULL, "cpu");
100 (int *)get_property(np, "clock-frequency", NULL);
102 loops_per_jiffy = *fp / HZ;
104 loops_per_jiffy = 50000000 / HZ;
108 /* CPU & Port mux setup */
109 mpc52xx_setup_cpu(); /* Generic */
110 lite52xx_setup_cpu(); /* Platorm specific */
112 #ifdef CONFIG_BLK_DEV_INITRD
114 ROOT_DEV = Root_RAM0;
117 #ifdef CONFIG_ROOT_NFS
120 ROOT_DEV = Root_HDA1;
125 void lite52xx_show_cpuinfo(struct seq_file *m)
127 struct device_node* np = of_find_all_nodes(NULL);
128 const char *model = NULL;
131 model = get_property(np, "model", NULL);
133 seq_printf(m, "vendor\t\t: Freescale Semiconductor\n");
134 seq_printf(m, "machine\t\t: %s\n", model ? model : "unknown");
140 * Called very early, MMU is off, device-tree isn't unflattened
142 static int __init lite52xx_probe(void)
144 unsigned long node = of_get_flat_dt_root();
145 const char *model = of_get_flat_dt_prop(node, "model", NULL);
147 if (!of_flat_dt_is_compatible(node, "lite52xx"))
149 pr_debug("%s board w/ mpc52xx found\n", model ? model : "unknown");
154 define_machine(lite52xx) {
156 .probe = lite52xx_probe,
157 .setup_arch = lite52xx_setup_arch,
158 .init_IRQ = mpc52xx_init_irq,
159 .get_irq = mpc52xx_get_irq,
160 .show_cpuinfo = lite52xx_show_cpuinfo,
161 .calibrate_decr = generic_calibrate_decr,