1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * arch/powerpc/platforms/83xx/mpc837x_mds.c
5 * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
7 * MPC837x MDS board specific routines
10 #include <linux/pci.h>
12 #include <linux/of_platform.h>
18 #include <sysdev/fsl_pci.h>
22 #define BCSR12_USB_SER_MASK 0x8a
23 #define BCSR12_USB_SER_PIN 0x80
24 #define BCSR12_USB_SER_DEVICE 0x02
26 static int mpc837xmds_usb_cfg(void)
28 struct device_node *np;
29 const void *phy_type, *mode;
30 void __iomem *bcsr_regs = NULL;
34 ret = mpc837x_usb_cfg();
38 np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
40 bcsr_regs = of_iomap(np, 0);
46 np = of_find_node_by_name(NULL, "usb");
51 phy_type = of_get_property(np, "phy_type", NULL);
52 if (phy_type && !strcmp(phy_type, "ulpi")) {
53 clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
54 } else if (phy_type && !strcmp(phy_type, "serial")) {
55 mode = of_get_property(np, "dr_mode", NULL);
56 bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
57 bcsr12 |= BCSR12_USB_SER_PIN;
58 if (mode && !strcmp(mode, "peripheral"))
59 bcsr12 |= BCSR12_USB_SER_DEVICE;
60 out_8(bcsr_regs + 12, bcsr12);
62 printk(KERN_ERR "USB DR: unsupported PHY\n");
71 /* ************************************************************************
73 * Setup the architecture
76 static void __init mpc837x_mds_setup_arch(void)
82 machine_device_initcall(mpc837x_mds, mpc83xx_declare_of_platform_devices);
85 * Called very early, MMU is off, device-tree isn't unflattened
87 static int __init mpc837x_mds_probe(void)
89 return of_machine_is_compatible("fsl,mpc837xmds");
92 define_machine(mpc837x_mds) {
93 .name = "MPC837x MDS",
94 .probe = mpc837x_mds_probe,
95 .setup_arch = mpc837x_mds_setup_arch,
96 .init_IRQ = mpc83xx_ipic_init_IRQ,
97 .get_irq = ipic_get_irq,
98 .restart = mpc83xx_restart,
99 .time_init = mpc83xx_time_init,
100 .calibrate_decr = generic_calibrate_decr,
101 .progress = udbg_progress,