platforms/83xx/mpc834x_mds.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * arch/powerpc/platforms/83xx/mpc834x_mds.c
0004  *
0005  * MPC834x MDS board specific routines
0006  *
0007  * Maintainer: Kumar Gala <galak@kernel.crashing.org>
0008  */
0009
0010 #include <linux/stddef.h>
0011 #include <linux/kernel.h>
0012 #include <linux/init.h>
0013 #include <linux/errno.h>
0014 #include <linux/reboot.h>
0015 #include <linux/pci.h>
0016 #include <linux/kdev_t.h>
0017 #include <linux/major.h>
0018 #include <linux/console.h>
0019 #include <linux/delay.h>
0020 #include <linux/seq_file.h>
0021 #include <linux/root_dev.h>
0022 #include <linux/of_address.h>
0023 #include <linux/of_platform.h>
0024
0025 #include <linux/atomic.h>
0026 #include <asm/time.h>
0027 #include <asm/io.h>
0028 #include <asm/machdep.h>
0029 #include <asm/ipic.h>
0030 #include <asm/irq.h>
0031 #include <asm/udbg.h>
0032 #include <sysdev/fsl_soc.h>
0033 #include <sysdev/fsl_pci.h>
0034
0035 #include "mpc83xx.h"
0036
0037 #define BCSR5_INT_USB       0x02
0038 static int __init mpc834xemds_usb_cfg(void)
0039 {
0040     struct device_node *np;
0041     void __iomem *bcsr_regs = NULL;
0042     u8 bcsr5;
0043
0044     mpc834x_usb_cfg();
0045     /* Map BCSR area */
0046     np = of_find_node_by_name(NULL, "bcsr");
0047     if (np) {
0048         struct resource res;
0049
0050         of_address_to_resource(np, 0, &res);
0051         bcsr_regs = ioremap(res.start, resource_size(&res));
0052         of_node_put(np);
0053     }
0054     if (!bcsr_regs)
0055         return -1;
0056
0057     /*
0058      * if Processor Board is plugged into PIB board,
0059      * force to use the PHY on Processor Board
0060      */
0061     bcsr5 = in_8(bcsr_regs + 5);
0062     if (!(bcsr5 & BCSR5_INT_USB))
0063         out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
0064     iounmap(bcsr_regs);
0065     return 0;
0066 }
0067
0068 /* ************************************************************************
0069  *
0070  * Setup the architecture
0071  *
0072  */
0073 static void __init mpc834x_mds_setup_arch(void)
0074 {
0075     mpc83xx_setup_arch();
0076
0077     mpc834xemds_usb_cfg();
0078 }
0079
0080 machine_device_initcall(mpc834x_mds, mpc83xx_declare_of_platform_devices);
0081
0082 /*
0083  * Called very early, MMU is off, device-tree isn't unflattened
0084  */
0085 static int __init mpc834x_mds_probe(void)
0086 {
0087     return of_machine_is_compatible("MPC834xMDS");
0088 }
0089
0090 define_machine(mpc834x_mds) {
0091     .name           = "MPC834x MDS",
0092     .probe          = mpc834x_mds_probe,
0093     .setup_arch     = mpc834x_mds_setup_arch,
0094     .discover_phbs      = mpc83xx_setup_pci,
0095     .init_IRQ       = mpc83xx_ipic_init_IRQ,
0096     .get_irq        = ipic_get_irq,
0097     .restart        = mpc83xx_restart,
0098     .time_init      = mpc83xx_time_init,
0099     .calibrate_decr     = generic_calibrate_decr,
0100     .progress       = udbg_progress,
0101 };