arch/powerpc/platforms/83xx/mpc834x_mds.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * arch/powerpc/platforms/83xx/mpc834x_mds.c
   4  *
   5  * MPC834x MDS board specific routines
   6  *
   7  * Maintainer: Kumar Gala <galak@kernel.crashing.org>
   8  */
   9
  10 #include <linux/stddef.h>
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/errno.h>
  14 #include <linux/reboot.h>
  15 #include <linux/pci.h>
  16 #include <linux/kdev_t.h>
  17 #include <linux/major.h>
  18 #include <linux/console.h>
  19 #include <linux/delay.h>
  20 #include <linux/seq_file.h>
  21 #include <linux/root_dev.h>
  22 #include <linux/of_platform.h>
  23
  24 #include <linux/atomic.h>
  25 #include <asm/time.h>
  26 #include <asm/io.h>
  27 #include <asm/machdep.h>
  28 #include <asm/ipic.h>
  29 #include <asm/irq.h>
  30 #include <asm/prom.h>
  31 #include <asm/udbg.h>
  32 #include <sysdev/fsl_soc.h>
  33 #include <sysdev/fsl_pci.h>
  34
  35 #include "mpc83xx.h"
  36
  37 #define BCSR5_INT_USB           0x02
  38 static int mpc834xemds_usb_cfg(void)
  39 {
  40         struct device_node *np;
  41         void __iomem *bcsr_regs = NULL;
  42         u8 bcsr5;
  43
  44         mpc834x_usb_cfg();
  45         /* Map BCSR area */
  46         np = of_find_node_by_name(NULL, "bcsr");
  47         if (np) {
  48                 struct resource res;
  49
  50                 of_address_to_resource(np, 0, &res);
  51                 bcsr_regs = ioremap(res.start, resource_size(&res));
  52                 of_node_put(np);
  53         }
  54         if (!bcsr_regs)
  55                 return -1;
  56
  57         /*
  58          * if Processor Board is plugged into PIB board,
  59          * force to use the PHY on Processor Board
  60          */
  61         bcsr5 = in_8(bcsr_regs + 5);
  62         if (!(bcsr5 & BCSR5_INT_USB))
  63                 out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
  64         iounmap(bcsr_regs);
  65         return 0;
  66 }
  67
  68 /* ************************************************************************
  69  *
  70  * Setup the architecture
  71  *
  72  */
  73 static void __init mpc834x_mds_setup_arch(void)
  74 {
  75         mpc83xx_setup_arch();
  76
  77         mpc834xemds_usb_cfg();
  78 }
  79
  80 machine_device_initcall(mpc834x_mds, mpc83xx_declare_of_platform_devices);
  81
  82 /*
  83  * Called very early, MMU is off, device-tree isn't unflattened
  84  */
  85 static int __init mpc834x_mds_probe(void)
  86 {
  87         return of_machine_is_compatible("MPC834xMDS");
  88 }
  89
  90 define_machine(mpc834x_mds) {
  91         .name                   = "MPC834x MDS",
  92         .probe                  = mpc834x_mds_probe,
  93         .setup_arch             = mpc834x_mds_setup_arch,
  94         .init_IRQ               = mpc83xx_ipic_init_IRQ,
  95         .get_irq                = ipic_get_irq,
  96         .restart                = mpc83xx_restart,
  97         .time_init              = mpc83xx_time_init,
  98         .calibrate_decr         = generic_calibrate_decr,
  99         .progress               = udbg_progress,
 100 };