1 /*
2 * arch/powerpc/platforms/83xx/mpc837x_mds.c
3 *
4 * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
5 *
6 * MPC837x MDS board specific routines
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 */
13
14 #include <linux/pci.h>
15 #include <linux/of.h>
16 #include <linux/of_platform.h>
17
18 #include <asm/time.h>
19 #include <asm/ipic.h>
20 #include <asm/udbg.h>
21 #include <asm/prom.h>
22 #include <sysdev/fsl_pci.h>
23
24 #include "mpc83xx.h"
25
26 #define BCSR12_USB_SER_MASK 0x8a
27 #define BCSR12_USB_SER_PIN 0x80
28 #define BCSR12_USB_SER_DEVICE 0x02
29
mpc837xmds_usb_cfg(void)30 static int mpc837xmds_usb_cfg(void)
31 {
32 struct device_node *np;
33 const void *phy_type, *mode;
34 void __iomem *bcsr_regs = NULL;
35 u8 bcsr12;
36 int ret;
37
38 ret = mpc837x_usb_cfg();
39 if (ret)
40 return ret;
41 /* Map BCSR area */
42 np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
43 if (np) {
44 bcsr_regs = of_iomap(np, 0);
45 of_node_put(np);
46 }
47 if (!bcsr_regs)
48 return -1;
49
50 np = of_find_node_by_name(NULL, "usb");
51 if (!np) {
52 ret = -ENODEV;
53 goto out;
54 }
55 phy_type = of_get_property(np, "phy_type", NULL);
56 if (phy_type && !strcmp(phy_type, "ulpi")) {
57 clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
58 } else if (phy_type && !strcmp(phy_type, "serial")) {
59 mode = of_get_property(np, "dr_mode", NULL);
60 bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
61 bcsr12 |= BCSR12_USB_SER_PIN;
62 if (mode && !strcmp(mode, "peripheral"))
63 bcsr12 |= BCSR12_USB_SER_DEVICE;
64 out_8(bcsr_regs + 12, bcsr12);
65 } else {
66 printk(KERN_ERR "USB DR: unsupported PHY\n");
67 }
68
69 of_node_put(np);
70 out:
71 iounmap(bcsr_regs);
72 return ret;
73 }
74
75 /* ************************************************************************
76 *
77 * Setup the architecture
78 *
79 */
mpc837x_mds_setup_arch(void)80 static void __init mpc837x_mds_setup_arch(void)
81 {
82 mpc83xx_setup_arch();
83 mpc837xmds_usb_cfg();
84 }
85
86 machine_device_initcall(mpc837x_mds, mpc83xx_declare_of_platform_devices);
87
88 /*
89 * Called very early, MMU is off, device-tree isn't unflattened
90 */
mpc837x_mds_probe(void)91 static int __init mpc837x_mds_probe(void)
92 {
93 return of_machine_is_compatible("fsl,mpc837xmds");
94 }
95
define_machine(mpc837x_mds)96 define_machine(mpc837x_mds) {
97 .name = "MPC837x MDS",
98 .probe = mpc837x_mds_probe,
99 .setup_arch = mpc837x_mds_setup_arch,
100 .init_IRQ = mpc83xx_ipic_init_IRQ,
101 .get_irq = ipic_get_irq,
102 .restart = mpc83xx_restart,
103 .time_init = mpc83xx_time_init,
104 .calibrate_decr = generic_calibrate_decr,
105 .progress = udbg_progress,
106 };
107
