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 __initdata
struct of_device_id ppc460ex_of_bus
[] = {
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 unsigned long root
= of_get_flat_dt_root();
57 if (of_flat_dt_is_compatible(root
, "amcc,canyonlands")) {
58 ppc_pci_set_flags(PPC_PCI_REASSIGN_ALL_RSRC
);
64 /* USB PHY fixup code on Canyonlands kit. */
66 static int __init
ppc460ex_canyonlands_fixup(void)
70 struct device_node
*np
;
73 np
= of_find_compatible_node(NULL
, NULL
, "amcc,ppc460ex-bcsr");
75 printk(KERN_ERR
"failed did not find amcc, ppc460ex bcsr node\n");
79 bcsr
= of_iomap(np
, 0);
83 printk(KERN_CRIT
"Could not remap bcsr\n");
88 np
= of_find_compatible_node(NULL
, NULL
, "ibm,ppc4xx-gpio");
90 printk(KERN_ERR
"failed did not find ibm,ppc4xx-gpio node\n");
94 vaddr
= of_iomap(np
, 0);
98 printk(KERN_CRIT
"Could not get gpio node address\n");
102 /* Disable USB, through the BCSR7 bits */
103 setbits8(&bcsr
[7], BCSR_USB_EN
);
105 /* Wait for a while after reset */
108 /* Enable USB here */
109 clrbits8(&bcsr
[7], BCSR_USB_EN
);
112 * Configure multiplexed gpio16 and gpio19 as alternate1 output
113 * source after USB reset. In this configuration gpio16 will be
114 * USB2HStop and gpio19 will be USB2DStop. For more details refer to
115 * table 34-7 of PPC460EX user manual.
117 setbits32((vaddr
+ GPIO0_OSRH
), 0x42000000);
118 setbits32((vaddr
+ GPIO0_TSRH
), 0x42000000);
125 machine_device_initcall(canyonlands
, ppc460ex_canyonlands_fixup
);
126 define_machine(canyonlands
) {
127 .name
= "Canyonlands",
128 .probe
= ppc460ex_probe
,
129 .progress
= udbg_progress
,
130 .init_IRQ
= uic_init_tree
,
131 .get_irq
= uic_get_irq
,
132 .restart
= ppc4xx_reset_system
,
133 .calibrate_decr
= generic_calibrate_decr
,