1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * arch/powerpc/platforms/83xx/mpc837x_mds.c
4 *
5 * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
6 *
7 * MPC837x MDS board specific routines
8 */
9
10 #include <linux/pci.h>
11 #include <linux/of.h>
12 #include <linux/of_address.h>
13 #include <linux/of_platform.h>
14
15 #include <asm/time.h>
16 #include <asm/ipic.h>
17 #include <asm/udbg.h>
18 #include <sysdev/fsl_pci.h>
19
20 #include "mpc83xx.h"
21
22 #define BCSR12_USB_SER_MASK 0x8a
23 #define BCSR12_USB_SER_PIN 0x80
24 #define BCSR12_USB_SER_DEVICE 0x02
25
mpc837xmds_usb_cfg(void)26 static int __init mpc837xmds_usb_cfg(void)
27 {
28 struct device_node *np;
29 const void *phy_type, *mode;
30 void __iomem *bcsr_regs = NULL;
31 u8 bcsr12;
32 int ret;
33
34 ret = mpc837x_usb_cfg();
35 if (ret)
36 return ret;
37 /* Map BCSR area */
38 np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
39 if (np) {
40 bcsr_regs = of_iomap(np, 0);
41 of_node_put(np);
42 }
43 if (!bcsr_regs)
44 return -1;
45
46 np = of_find_node_by_name(NULL, "usb");
47 if (!np) {
48 ret = -ENODEV;
49 goto out;
50 }
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);
61 } else {
62 printk(KERN_ERR "USB DR: unsupported PHY\n");
63 }
64
65 of_node_put(np);
66 out:
67 iounmap(bcsr_regs);
68 return ret;
69 }
70
71 /* ************************************************************************
72 *
73 * Setup the architecture
74 *
75 */
mpc837x_mds_setup_arch(void)76 static void __init mpc837x_mds_setup_arch(void)
77 {
78 mpc83xx_setup_arch();
79 mpc837xmds_usb_cfg();
80 }
81
82 machine_device_initcall(mpc837x_mds, mpc83xx_declare_of_platform_devices);
83
84 /*
85 * Called very early, MMU is off, device-tree isn't unflattened
86 */
mpc837x_mds_probe(void)87 static int __init mpc837x_mds_probe(void)
88 {
89 return of_machine_is_compatible("fsl,mpc837xmds");
90 }
91
define_machine(mpc837x_mds)92 define_machine(mpc837x_mds) {
93 .name = "MPC837x MDS",
94 .probe = mpc837x_mds_probe,
95 .setup_arch = mpc837x_mds_setup_arch,
96 .discover_phbs = mpc83xx_setup_pci,
97 .init_IRQ = mpc83xx_ipic_init_IRQ,
98 .get_irq = ipic_get_irq,
99 .restart = mpc83xx_restart,
100 .time_init = mpc83xx_time_init,
101 .calibrate_decr = generic_calibrate_decr,
102 .progress = udbg_progress,
103 };
104