platforms/83xx/mpc837x_mds.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * arch/powerpc/platforms/83xx/mpc837x_mds.c
0004  *
0005  * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
0006  *
0007  * MPC837x MDS board specific routines
0008  */
0009
0010 #include <linux/pci.h>
0011 #include <linux/of.h>
0012 #include <linux/of_address.h>
0013 #include <linux/of_platform.h>
0014
0015 #include <asm/time.h>
0016 #include <asm/ipic.h>
0017 #include <asm/udbg.h>
0018 #include <sysdev/fsl_pci.h>
0019
0020 #include "mpc83xx.h"
0021
0022 #define BCSR12_USB_SER_MASK 0x8a
0023 #define BCSR12_USB_SER_PIN  0x80
0024 #define BCSR12_USB_SER_DEVICE   0x02
0025
0026 static int __init mpc837xmds_usb_cfg(void)
0027 {
0028     struct device_node *np;
0029     const void *phy_type, *mode;
0030     void __iomem *bcsr_regs = NULL;
0031     u8 bcsr12;
0032     int ret;
0033
0034     ret = mpc837x_usb_cfg();
0035     if (ret)
0036         return ret;
0037     /* Map BCSR area */
0038     np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
0039     if (np) {
0040         bcsr_regs = of_iomap(np, 0);
0041         of_node_put(np);
0042     }
0043     if (!bcsr_regs)
0044         return -1;
0045
0046     np = of_find_node_by_name(NULL, "usb");
0047     if (!np) {
0048         ret = -ENODEV;
0049         goto out;
0050     }
0051     phy_type = of_get_property(np, "phy_type", NULL);
0052     if (phy_type && !strcmp(phy_type, "ulpi")) {
0053         clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
0054     } else if (phy_type && !strcmp(phy_type, "serial")) {
0055         mode = of_get_property(np, "dr_mode", NULL);
0056         bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
0057         bcsr12 |= BCSR12_USB_SER_PIN;
0058         if (mode && !strcmp(mode, "peripheral"))
0059             bcsr12 |= BCSR12_USB_SER_DEVICE;
0060         out_8(bcsr_regs + 12, bcsr12);
0061     } else {
0062         printk(KERN_ERR "USB DR: unsupported PHY\n");
0063     }
0064
0065     of_node_put(np);
0066 out:
0067     iounmap(bcsr_regs);
0068     return ret;
0069 }
0070
0071 /* ************************************************************************
0072  *
0073  * Setup the architecture
0074  *
0075  */
0076 static void __init mpc837x_mds_setup_arch(void)
0077 {
0078     mpc83xx_setup_arch();
0079     mpc837xmds_usb_cfg();
0080 }
0081
0082 machine_device_initcall(mpc837x_mds, mpc83xx_declare_of_platform_devices);
0083
0084 /*
0085  * Called very early, MMU is off, device-tree isn't unflattened
0086  */
0087 static int __init mpc837x_mds_probe(void)
0088 {
0089     return of_machine_is_compatible("fsl,mpc837xmds");
0090 }
0091
0092 define_machine(mpc837x_mds) {
0093     .name           = "MPC837x MDS",
0094     .probe          = mpc837x_mds_probe,
0095     .setup_arch     = mpc837x_mds_setup_arch,
0096     .discover_phbs      = mpc83xx_setup_pci,
0097     .init_IRQ       = mpc83xx_ipic_init_IRQ,
0098     .get_irq        = ipic_get_irq,
0099     .restart        = mpc83xx_restart,
0100     .time_init      = mpc83xx_time_init,
0101     .calibrate_decr     = generic_calibrate_decr,
0102     .progress       = udbg_progress,
0103 };