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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
8960f7ff RS |
2 | /* |
3 | * This contain platform specific code for APM PPC460EX based Canyonlands | |
4 | * board. | |
5 | * | |
6 | * Copyright (c) 2010, Applied Micro Circuits Corporation | |
7 | * Author: Rupjyoti Sarmah <rsarmah@apm.com> | |
8960f7ff RS |
8 | */ |
9 | #include <linux/kernel.h> | |
10 | #include <linux/init.h> | |
11 | #include <asm/pci-bridge.h> | |
12 | #include <asm/ppc4xx.h> | |
13 | #include <asm/udbg.h> | |
14 | #include <asm/uic.h> | |
15 | #include <linux/of_platform.h> | |
16 | #include <linux/delay.h> | |
17 | #include "44x.h" | |
18 | ||
19 | #define BCSR_USB_EN 0x11 | |
20 | ||
ce6d73c9 | 21 | static const struct of_device_id ppc460ex_of_bus[] __initconst = { |
8960f7ff RS |
22 | { .compatible = "ibm,plb4", }, |
23 | { .compatible = "ibm,opb", }, | |
24 | { .compatible = "ibm,ebc", }, | |
25 | { .compatible = "simple-bus", }, | |
26 | {}, | |
27 | }; | |
28 | ||
29 | static int __init ppc460ex_device_probe(void) | |
30 | { | |
31 | of_platform_bus_probe(NULL, ppc460ex_of_bus, NULL); | |
32 | ||
33 | return 0; | |
34 | } | |
35 | machine_device_initcall(canyonlands, ppc460ex_device_probe); | |
36 | ||
37 | /* Using this code only for the Canyonlands board. */ | |
38 | ||
39 | static int __init ppc460ex_probe(void) | |
40 | { | |
56571384 | 41 | if (of_machine_is_compatible("amcc,canyonlands")) { |
0e47ff1c | 42 | pci_set_flags(PCI_REASSIGN_ALL_RSRC); |
8960f7ff | 43 | return 1; |
56571384 | 44 | } |
8960f7ff RS |
45 | return 0; |
46 | } | |
47 | ||
48 | /* USB PHY fixup code on Canyonlands kit. */ | |
49 | ||
50 | static int __init ppc460ex_canyonlands_fixup(void) | |
51 | { | |
52 | u8 __iomem *bcsr ; | |
53 | void __iomem *vaddr; | |
54 | struct device_node *np; | |
55 | int ret = 0; | |
56 | ||
57 | np = of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-bcsr"); | |
58 | if (!np) { | |
59 | printk(KERN_ERR "failed did not find amcc, ppc460ex bcsr node\n"); | |
60 | return -ENODEV; | |
61 | } | |
62 | ||
63 | bcsr = of_iomap(np, 0); | |
64 | of_node_put(np); | |
65 | ||
66 | if (!bcsr) { | |
67 | printk(KERN_CRIT "Could not remap bcsr\n"); | |
68 | ret = -ENODEV; | |
69 | goto err_bcsr; | |
70 | } | |
71 | ||
72 | np = of_find_compatible_node(NULL, NULL, "ibm,ppc4xx-gpio"); | |
73 | if (!np) { | |
74 | printk(KERN_ERR "failed did not find ibm,ppc4xx-gpio node\n"); | |
75 | return -ENODEV; | |
76 | } | |
77 | ||
78 | vaddr = of_iomap(np, 0); | |
79 | of_node_put(np); | |
80 | ||
81 | if (!vaddr) { | |
82 | printk(KERN_CRIT "Could not get gpio node address\n"); | |
83 | ret = -ENODEV; | |
84 | goto err_gpio; | |
85 | } | |
86 | /* Disable USB, through the BCSR7 bits */ | |
87 | setbits8(&bcsr[7], BCSR_USB_EN); | |
88 | ||
89 | /* Wait for a while after reset */ | |
90 | msleep(100); | |
91 | ||
92 | /* Enable USB here */ | |
93 | clrbits8(&bcsr[7], BCSR_USB_EN); | |
94 | ||
95 | /* | |
96 | * Configure multiplexed gpio16 and gpio19 as alternate1 output | |
97 | * source after USB reset. In this configuration gpio16 will be | |
98 | * USB2HStop and gpio19 will be USB2DStop. For more details refer to | |
99 | * table 34-7 of PPC460EX user manual. | |
100 | */ | |
101 | setbits32((vaddr + GPIO0_OSRH), 0x42000000); | |
102 | setbits32((vaddr + GPIO0_TSRH), 0x42000000); | |
103 | err_gpio: | |
104 | iounmap(vaddr); | |
105 | err_bcsr: | |
106 | iounmap(bcsr); | |
107 | return ret; | |
108 | } | |
109 | machine_device_initcall(canyonlands, ppc460ex_canyonlands_fixup); | |
110 | define_machine(canyonlands) { | |
111 | .name = "Canyonlands", | |
112 | .probe = ppc460ex_probe, | |
113 | .progress = udbg_progress, | |
114 | .init_IRQ = uic_init_tree, | |
115 | .get_irq = uic_get_irq, | |
116 | .restart = ppc4xx_reset_system, | |
117 | .calibrate_decr = generic_calibrate_decr, | |
118 | }; |