1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * arch/powerpc/platforms/83xx/mpc837x_mds.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * MPC837x MDS board specific routines
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/pci.h>
11*4882a593Smuzhiyun #include <linux/of.h>
12*4882a593Smuzhiyun #include <linux/of_platform.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include <asm/time.h>
15*4882a593Smuzhiyun #include <asm/ipic.h>
16*4882a593Smuzhiyun #include <asm/udbg.h>
17*4882a593Smuzhiyun #include <asm/prom.h>
18*4882a593Smuzhiyun #include <sysdev/fsl_pci.h>
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #include "mpc83xx.h"
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #define BCSR12_USB_SER_MASK 0x8a
23*4882a593Smuzhiyun #define BCSR12_USB_SER_PIN 0x80
24*4882a593Smuzhiyun #define BCSR12_USB_SER_DEVICE 0x02
25*4882a593Smuzhiyun
mpc837xmds_usb_cfg(void)26*4882a593Smuzhiyun static int mpc837xmds_usb_cfg(void)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun struct device_node *np;
29*4882a593Smuzhiyun const void *phy_type, *mode;
30*4882a593Smuzhiyun void __iomem *bcsr_regs = NULL;
31*4882a593Smuzhiyun u8 bcsr12;
32*4882a593Smuzhiyun int ret;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun ret = mpc837x_usb_cfg();
35*4882a593Smuzhiyun if (ret)
36*4882a593Smuzhiyun return ret;
37*4882a593Smuzhiyun /* Map BCSR area */
38*4882a593Smuzhiyun np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
39*4882a593Smuzhiyun if (np) {
40*4882a593Smuzhiyun bcsr_regs = of_iomap(np, 0);
41*4882a593Smuzhiyun of_node_put(np);
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun if (!bcsr_regs)
44*4882a593Smuzhiyun return -1;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun np = of_find_node_by_name(NULL, "usb");
47*4882a593Smuzhiyun if (!np) {
48*4882a593Smuzhiyun ret = -ENODEV;
49*4882a593Smuzhiyun goto out;
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun phy_type = of_get_property(np, "phy_type", NULL);
52*4882a593Smuzhiyun if (phy_type && !strcmp(phy_type, "ulpi")) {
53*4882a593Smuzhiyun clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
54*4882a593Smuzhiyun } else if (phy_type && !strcmp(phy_type, "serial")) {
55*4882a593Smuzhiyun mode = of_get_property(np, "dr_mode", NULL);
56*4882a593Smuzhiyun bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
57*4882a593Smuzhiyun bcsr12 |= BCSR12_USB_SER_PIN;
58*4882a593Smuzhiyun if (mode && !strcmp(mode, "peripheral"))
59*4882a593Smuzhiyun bcsr12 |= BCSR12_USB_SER_DEVICE;
60*4882a593Smuzhiyun out_8(bcsr_regs + 12, bcsr12);
61*4882a593Smuzhiyun } else {
62*4882a593Smuzhiyun printk(KERN_ERR "USB DR: unsupported PHY\n");
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun of_node_put(np);
66*4882a593Smuzhiyun out:
67*4882a593Smuzhiyun iounmap(bcsr_regs);
68*4882a593Smuzhiyun return ret;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun /* ************************************************************************
72*4882a593Smuzhiyun *
73*4882a593Smuzhiyun * Setup the architecture
74*4882a593Smuzhiyun *
75*4882a593Smuzhiyun */
mpc837x_mds_setup_arch(void)76*4882a593Smuzhiyun static void __init mpc837x_mds_setup_arch(void)
77*4882a593Smuzhiyun {
78*4882a593Smuzhiyun mpc83xx_setup_arch();
79*4882a593Smuzhiyun mpc837xmds_usb_cfg();
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun machine_device_initcall(mpc837x_mds, mpc83xx_declare_of_platform_devices);
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun /*
85*4882a593Smuzhiyun * Called very early, MMU is off, device-tree isn't unflattened
86*4882a593Smuzhiyun */
mpc837x_mds_probe(void)87*4882a593Smuzhiyun static int __init mpc837x_mds_probe(void)
88*4882a593Smuzhiyun {
89*4882a593Smuzhiyun return of_machine_is_compatible("fsl,mpc837xmds");
90*4882a593Smuzhiyun }
91*4882a593Smuzhiyun
define_machine(mpc837x_mds)92*4882a593Smuzhiyun define_machine(mpc837x_mds) {
93*4882a593Smuzhiyun .name = "MPC837x MDS",
94*4882a593Smuzhiyun .probe = mpc837x_mds_probe,
95*4882a593Smuzhiyun .setup_arch = mpc837x_mds_setup_arch,
96*4882a593Smuzhiyun .init_IRQ = mpc83xx_ipic_init_IRQ,
97*4882a593Smuzhiyun .get_irq = ipic_get_irq,
98*4882a593Smuzhiyun .restart = mpc83xx_restart,
99*4882a593Smuzhiyun .time_init = mpc83xx_time_init,
100*4882a593Smuzhiyun .calibrate_decr = generic_calibrate_decr,
101*4882a593Smuzhiyun .progress = udbg_progress,
102*4882a593Smuzhiyun };
103