1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * arch/powerpc/platforms/83xx/mpc834x_mds.c
4 *
5 * MPC834x MDS board specific routines
6 *
7 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
8 */
9
10 #include <linux/stddef.h>
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/errno.h>
14 #include <linux/reboot.h>
15 #include <linux/pci.h>
16 #include <linux/kdev_t.h>
17 #include <linux/major.h>
18 #include <linux/console.h>
19 #include <linux/delay.h>
20 #include <linux/seq_file.h>
21 #include <linux/root_dev.h>
22 #include <linux/of_platform.h>
23
24 #include <linux/atomic.h>
25 #include <asm/time.h>
26 #include <asm/io.h>
27 #include <asm/machdep.h>
28 #include <asm/ipic.h>
29 #include <asm/irq.h>
30 #include <asm/prom.h>
31 #include <asm/udbg.h>
32 #include <sysdev/fsl_soc.h>
33 #include <sysdev/fsl_pci.h>
34
35 #include "mpc83xx.h"
36
37 #define BCSR5_INT_USB 0x02
mpc834xemds_usb_cfg(void)38 static int mpc834xemds_usb_cfg(void)
39 {
40 struct device_node *np;
41 void __iomem *bcsr_regs = NULL;
42 u8 bcsr5;
43
44 mpc834x_usb_cfg();
45 /* Map BCSR area */
46 np = of_find_node_by_name(NULL, "bcsr");
47 if (np) {
48 struct resource res;
49
50 of_address_to_resource(np, 0, &res);
51 bcsr_regs = ioremap(res.start, resource_size(&res));
52 of_node_put(np);
53 }
54 if (!bcsr_regs)
55 return -1;
56
57 /*
58 * if Processor Board is plugged into PIB board,
59 * force to use the PHY on Processor Board
60 */
61 bcsr5 = in_8(bcsr_regs + 5);
62 if (!(bcsr5 & BCSR5_INT_USB))
63 out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
64 iounmap(bcsr_regs);
65 return 0;
66 }
67
68 /* ************************************************************************
69 *
70 * Setup the architecture
71 *
72 */
mpc834x_mds_setup_arch(void)73 static void __init mpc834x_mds_setup_arch(void)
74 {
75 mpc83xx_setup_arch();
76
77 mpc834xemds_usb_cfg();
78 }
79
80 machine_device_initcall(mpc834x_mds, mpc83xx_declare_of_platform_devices);
81
82 /*
83 * Called very early, MMU is off, device-tree isn't unflattened
84 */
mpc834x_mds_probe(void)85 static int __init mpc834x_mds_probe(void)
86 {
87 return of_machine_is_compatible("MPC834xMDS");
88 }
89
define_machine(mpc834x_mds)90 define_machine(mpc834x_mds) {
91 .name = "MPC834x MDS",
92 .probe = mpc834x_mds_probe,
93 .setup_arch = mpc834x_mds_setup_arch,
94 .init_IRQ = mpc83xx_ipic_init_IRQ,
95 .get_irq = ipic_get_irq,
96 .restart = mpc83xx_restart,
97 .time_init = mpc83xx_time_init,
98 .calibrate_decr = generic_calibrate_decr,
99 .progress = udbg_progress,
100 };
101
