1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * arch/powerpc/platforms/83xx/mpc834x_mds.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * MPC834x MDS board specific routines
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Maintainer: Kumar Gala <galak@kernel.crashing.org>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/stddef.h>
11*4882a593Smuzhiyun #include <linux/kernel.h>
12*4882a593Smuzhiyun #include <linux/init.h>
13*4882a593Smuzhiyun #include <linux/errno.h>
14*4882a593Smuzhiyun #include <linux/reboot.h>
15*4882a593Smuzhiyun #include <linux/pci.h>
16*4882a593Smuzhiyun #include <linux/kdev_t.h>
17*4882a593Smuzhiyun #include <linux/major.h>
18*4882a593Smuzhiyun #include <linux/console.h>
19*4882a593Smuzhiyun #include <linux/delay.h>
20*4882a593Smuzhiyun #include <linux/seq_file.h>
21*4882a593Smuzhiyun #include <linux/root_dev.h>
22*4882a593Smuzhiyun #include <linux/of_platform.h>
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun #include <linux/atomic.h>
25*4882a593Smuzhiyun #include <asm/time.h>
26*4882a593Smuzhiyun #include <asm/io.h>
27*4882a593Smuzhiyun #include <asm/machdep.h>
28*4882a593Smuzhiyun #include <asm/ipic.h>
29*4882a593Smuzhiyun #include <asm/irq.h>
30*4882a593Smuzhiyun #include <asm/prom.h>
31*4882a593Smuzhiyun #include <asm/udbg.h>
32*4882a593Smuzhiyun #include <sysdev/fsl_soc.h>
33*4882a593Smuzhiyun #include <sysdev/fsl_pci.h>
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun #include "mpc83xx.h"
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun #define BCSR5_INT_USB 0x02
mpc834xemds_usb_cfg(void)38*4882a593Smuzhiyun static int mpc834xemds_usb_cfg(void)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun struct device_node *np;
41*4882a593Smuzhiyun void __iomem *bcsr_regs = NULL;
42*4882a593Smuzhiyun u8 bcsr5;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun mpc834x_usb_cfg();
45*4882a593Smuzhiyun /* Map BCSR area */
46*4882a593Smuzhiyun np = of_find_node_by_name(NULL, "bcsr");
47*4882a593Smuzhiyun if (np) {
48*4882a593Smuzhiyun struct resource res;
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun of_address_to_resource(np, 0, &res);
51*4882a593Smuzhiyun bcsr_regs = ioremap(res.start, resource_size(&res));
52*4882a593Smuzhiyun of_node_put(np);
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun if (!bcsr_regs)
55*4882a593Smuzhiyun return -1;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun /*
58*4882a593Smuzhiyun * if Processor Board is plugged into PIB board,
59*4882a593Smuzhiyun * force to use the PHY on Processor Board
60*4882a593Smuzhiyun */
61*4882a593Smuzhiyun bcsr5 = in_8(bcsr_regs + 5);
62*4882a593Smuzhiyun if (!(bcsr5 & BCSR5_INT_USB))
63*4882a593Smuzhiyun out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
64*4882a593Smuzhiyun iounmap(bcsr_regs);
65*4882a593Smuzhiyun return 0;
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun /* ************************************************************************
69*4882a593Smuzhiyun *
70*4882a593Smuzhiyun * Setup the architecture
71*4882a593Smuzhiyun *
72*4882a593Smuzhiyun */
mpc834x_mds_setup_arch(void)73*4882a593Smuzhiyun static void __init mpc834x_mds_setup_arch(void)
74*4882a593Smuzhiyun {
75*4882a593Smuzhiyun mpc83xx_setup_arch();
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun mpc834xemds_usb_cfg();
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun machine_device_initcall(mpc834x_mds, mpc83xx_declare_of_platform_devices);
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun /*
83*4882a593Smuzhiyun * Called very early, MMU is off, device-tree isn't unflattened
84*4882a593Smuzhiyun */
mpc834x_mds_probe(void)85*4882a593Smuzhiyun static int __init mpc834x_mds_probe(void)
86*4882a593Smuzhiyun {
87*4882a593Smuzhiyun return of_machine_is_compatible("MPC834xMDS");
88*4882a593Smuzhiyun }
89*4882a593Smuzhiyun
define_machine(mpc834x_mds)90*4882a593Smuzhiyun define_machine(mpc834x_mds) {
91*4882a593Smuzhiyun .name = "MPC834x MDS",
92*4882a593Smuzhiyun .probe = mpc834x_mds_probe,
93*4882a593Smuzhiyun .setup_arch = mpc834x_mds_setup_arch,
94*4882a593Smuzhiyun .init_IRQ = mpc83xx_ipic_init_IRQ,
95*4882a593Smuzhiyun .get_irq = ipic_get_irq,
96*4882a593Smuzhiyun .restart = mpc83xx_restart,
97*4882a593Smuzhiyun .time_init = mpc83xx_time_init,
98*4882a593Smuzhiyun .calibrate_decr = generic_calibrate_decr,
99*4882a593Smuzhiyun .progress = udbg_progress,
100*4882a593Smuzhiyun };
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