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1 | /* |
2 | * This contain platform specific code for APM PPC460EX based Canyonlands | |
3 | * board. | |
4 | * | |
5 | * Copyright (c) 2010, Applied Micro Circuits Corporation | |
6 | * Author: Rupjyoti Sarmah <rsarmah@apm.com> | |
7 | * | |
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. | |
12 | * | |
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. | |
17 | * | |
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, | |
21 | * MA 02111-1307 USA | |
22 | * | |
23 | */ | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/init.h> | |
26 | #include <asm/pci-bridge.h> | |
27 | #include <asm/ppc4xx.h> | |
28 | #include <asm/udbg.h> | |
29 | #include <asm/uic.h> | |
30 | #include <linux/of_platform.h> | |
31 | #include <linux/delay.h> | |
32 | #include "44x.h" | |
33 | ||
34 | #define BCSR_USB_EN 0x11 | |
35 | ||
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", }, | |
41 | {}, | |
42 | }; | |
43 | ||
44 | static int __init ppc460ex_device_probe(void) | |
45 | { | |
46 | of_platform_bus_probe(NULL, ppc460ex_of_bus, NULL); | |
47 | ||
48 | return 0; | |
49 | } | |
50 | machine_device_initcall(canyonlands, ppc460ex_device_probe); | |
51 | ||
52 | /* Using this code only for the Canyonlands board. */ | |
53 | ||
54 | static int __init ppc460ex_probe(void) | |
55 | { | |
56 | unsigned long root = of_get_flat_dt_root(); | |
57 | if (of_flat_dt_is_compatible(root, "amcc,canyonlands")) { | |
0e47ff1c | 58 | pci_set_flags(PCI_REASSIGN_ALL_RSRC); |
8960f7ff RS |
59 | return 1; |
60 | } | |
61 | return 0; | |
62 | } | |
63 | ||
64 | /* USB PHY fixup code on Canyonlands kit. */ | |
65 | ||
66 | static int __init ppc460ex_canyonlands_fixup(void) | |
67 | { | |
68 | u8 __iomem *bcsr ; | |
69 | void __iomem *vaddr; | |
70 | struct device_node *np; | |
71 | int ret = 0; | |
72 | ||
73 | np = of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-bcsr"); | |
74 | if (!np) { | |
75 | printk(KERN_ERR "failed did not find amcc, ppc460ex bcsr node\n"); | |
76 | return -ENODEV; | |
77 | } | |
78 | ||
79 | bcsr = of_iomap(np, 0); | |
80 | of_node_put(np); | |
81 | ||
82 | if (!bcsr) { | |
83 | printk(KERN_CRIT "Could not remap bcsr\n"); | |
84 | ret = -ENODEV; | |
85 | goto err_bcsr; | |
86 | } | |
87 | ||
88 | np = of_find_compatible_node(NULL, NULL, "ibm,ppc4xx-gpio"); | |
89 | if (!np) { | |
90 | printk(KERN_ERR "failed did not find ibm,ppc4xx-gpio node\n"); | |
91 | return -ENODEV; | |
92 | } | |
93 | ||
94 | vaddr = of_iomap(np, 0); | |
95 | of_node_put(np); | |
96 | ||
97 | if (!vaddr) { | |
98 | printk(KERN_CRIT "Could not get gpio node address\n"); | |
99 | ret = -ENODEV; | |
100 | goto err_gpio; | |
101 | } | |
102 | /* Disable USB, through the BCSR7 bits */ | |
103 | setbits8(&bcsr[7], BCSR_USB_EN); | |
104 | ||
105 | /* Wait for a while after reset */ | |
106 | msleep(100); | |
107 | ||
108 | /* Enable USB here */ | |
109 | clrbits8(&bcsr[7], BCSR_USB_EN); | |
110 | ||
111 | /* | |
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. | |
116 | */ | |
117 | setbits32((vaddr + GPIO0_OSRH), 0x42000000); | |
118 | setbits32((vaddr + GPIO0_TSRH), 0x42000000); | |
119 | err_gpio: | |
120 | iounmap(vaddr); | |
121 | err_bcsr: | |
122 | iounmap(bcsr); | |
123 | return ret; | |
124 | } | |
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, | |
134 | }; |