1 /*
2 * arch/powerpc/platforms/83xx/mpc834x_mds.c
3 *
4 * MPC834x MDS board specific routines
5 *
6 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
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/stddef.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/errno.h>
18 #include <linux/reboot.h>
19 #include <linux/pci.h>
20 #include <linux/kdev_t.h>
21 #include <linux/major.h>
22 #include <linux/console.h>
23 #include <linux/delay.h>
24 #include <linux/seq_file.h>
25 #include <linux/root_dev.h>
26 #include <linux/of_platform.h>
27
28 #include <asm/system.h>
29 #include <linux/atomic.h>
30 #include <asm/time.h>
31 #include <asm/io.h>
32 #include <asm/machdep.h>
33 #include <asm/ipic.h>
34 #include <asm/irq.h>
35 #include <asm/prom.h>
36 #include <asm/udbg.h>
37 #include <sysdev/fsl_soc.h>
38 #include <sysdev/fsl_pci.h>
39
40 #include "mpc83xx.h"
41
42 #define BCSR5_INT_USB 0x02
mpc834xemds_usb_cfg(void)43 static int mpc834xemds_usb_cfg(void)
44 {
45 struct device_node *np;
46 void __iomem *bcsr_regs = NULL;
47 u8 bcsr5;
48
49 mpc834x_usb_cfg();
50 /* Map BCSR area */
51 np = of_find_node_by_name(NULL, "bcsr");
52 if (np) {
53 struct resource res;
54
55 of_address_to_resource(np, 0, &res);
56 bcsr_regs = ioremap(res.start, resource_size(&res));
57 of_node_put(np);
58 }
59 if (!bcsr_regs)
60 return -1;
61
62 /*
63 * if Processor Board is plugged into PIB board,
64 * force to use the PHY on Processor Board
65 */
66 bcsr5 = in_8(bcsr_regs + 5);
67 if (!(bcsr5 & BCSR5_INT_USB))
68 out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
69 iounmap(bcsr_regs);
70 return 0;
71 }
72
73 /* ************************************************************************
74 *
75 * Setup the architecture
76 *
77 */
mpc834x_mds_setup_arch(void)78 static void __init mpc834x_mds_setup_arch(void)
79 {
80 if (ppc_md.progress)
81 ppc_md.progress("mpc834x_mds_setup_arch()", 0);
82
83 mpc83xx_setup_pci();
84
85 mpc834xemds_usb_cfg();
86 }
87
88 machine_device_initcall(mpc834x_mds, mpc83xx_declare_of_platform_devices);
89
90 /*
91 * Called very early, MMU is off, device-tree isn't unflattened
92 */
mpc834x_mds_probe(void)93 static int __init mpc834x_mds_probe(void)
94 {
95 unsigned long root = of_get_flat_dt_root();
96
97 return of_flat_dt_is_compatible(root, "MPC834xMDS");
98 }
99
define_machine(mpc834x_mds)100 define_machine(mpc834x_mds) {
101 .name = "MPC834x MDS",
102 .probe = mpc834x_mds_probe,
103 .setup_arch = mpc834x_mds_setup_arch,
104 .init_IRQ = mpc83xx_ipic_init_IRQ,
105 .get_irq = ipic_get_irq,
106 .restart = mpc83xx_restart,
107 .time_init = mpc83xx_time_init,
108 .calibrate_decr = generic_calibrate_decr,
109 .progress = udbg_progress,
110 };
111