2 * This contain platform specific code for APM PPC460EX based Canyonlands
5 * Copyright (c) 2010, Applied Micro Circuits Corporation
6 * Author: Rupjyoti Sarmah <rsarmah@apm.com>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #include <linux/kernel.h>
25 #include <linux/init.h>
26 #include <asm/pci-bridge.h>
27 #include <asm/ppc4xx.h>
30 #include <linux/of_platform.h>
31 #include <linux/delay.h>
34 #define BCSR_USB_EN 0x11
36 static const struct of_device_id ppc460ex_of_bus[] __initconst = {
37 { .compatible = "ibm,plb4", },
38 { .compatible = "ibm,opb", },
39 { .compatible = "ibm,ebc", },
40 { .compatible = "simple-bus", },
44 static int __init ppc460ex_device_probe(void)
46 of_platform_bus_probe(NULL, ppc460ex_of_bus, NULL);
50 machine_device_initcall(canyonlands, ppc460ex_device_probe);
52 /* Using this code only for the Canyonlands board. */
54 static int __init ppc460ex_probe(void)
56 if (of_machine_is_compatible("amcc,canyonlands")) {
57 pci_set_flags(PCI_REASSIGN_ALL_RSRC);
63 /* USB PHY fixup code on Canyonlands kit. */
65 static int __init ppc460ex_canyonlands_fixup(void)
69 struct device_node *np;
72 np = of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-bcsr");
74 printk(KERN_ERR "failed did not find amcc, ppc460ex bcsr node\n");
78 bcsr = of_iomap(np, 0);
82 printk(KERN_CRIT "Could not remap bcsr\n");
87 np = of_find_compatible_node(NULL, NULL, "ibm,ppc4xx-gpio");
89 printk(KERN_ERR "failed did not find ibm,ppc4xx-gpio node\n");
93 vaddr = of_iomap(np, 0);
97 printk(KERN_CRIT "Could not get gpio node address\n");
101 /* Disable USB, through the BCSR7 bits */
102 setbits8(&bcsr[7], BCSR_USB_EN);
104 /* Wait for a while after reset */
107 /* Enable USB here */
108 clrbits8(&bcsr[7], BCSR_USB_EN);
111 * Configure multiplexed gpio16 and gpio19 as alternate1 output
112 * source after USB reset. In this configuration gpio16 will be
113 * USB2HStop and gpio19 will be USB2DStop. For more details refer to
114 * table 34-7 of PPC460EX user manual.
116 setbits32((vaddr + GPIO0_OSRH), 0x42000000);
117 setbits32((vaddr + GPIO0_TSRH), 0x42000000);
124 machine_device_initcall(canyonlands, ppc460ex_canyonlands_fixup);
125 define_machine(canyonlands) {
126 .name = "Canyonlands",
127 .probe = ppc460ex_probe,
128 .progress = udbg_progress,
129 .init_IRQ = uic_init_tree,
130 .get_irq = uic_get_irq,
131 .restart = ppc4xx_reset_system,
132 .calibrate_decr = generic_calibrate_decr,