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

  1 /*
  2  * arch/powerpc/platforms/83xx/mpc834x_mds.c
  3  *
  4  * MPC834x MDS board specific routines
  5  *
  6  * Maintainer: Kumar Gala <galak@kernel.crashing.org>
  7  *
  8  * This program is free software; you can redistribute  it and/or modify it
  9  * under  the terms of  the GNU General  Public License as published by the
 10  * Free Software Foundation;  either version 2 of the  License, or (at your
 11  * option) any later version.
 12  */
 13 
 14 #include <linux/stddef.h>
 15 #include <linux/kernel.h>
 16 #include <linux/init.h>
 17 #include <linux/errno.h>
 18 #include <linux/reboot.h>
 19 #include <linux/pci.h>
 20 #include <linux/kdev_t.h>
 21 #include <linux/major.h>
 22 #include <linux/console.h>
 23 #include <linux/delay.h>
 24 #include <linux/seq_file.h>
 25 #include <linux/root_dev.h>
 26 #include <linux/of_platform.h>
 27 
 28 #include <linux/atomic.h>
 29 #include <asm/time.h>
 30 #include <asm/io.h>
 31 #include <asm/machdep.h>
 32 #include <asm/ipic.h>
 33 #include <asm/irq.h>
 34 #include <asm/prom.h>
 35 #include <asm/udbg.h>
 36 #include <sysdev/fsl_soc.h>
 37 #include <sysdev/fsl_pci.h>
 38 
 39 #include "mpc83xx.h"
 40 
 41 #define BCSR5_INT_USB           0x02
 42 static int mpc834xemds_usb_cfg(void)
 43 {
 44         struct device_node *np;
 45         void __iomem *bcsr_regs = NULL;
 46         u8 bcsr5;
 47 
 48         mpc834x_usb_cfg();
 49         /* Map BCSR area */
 50         np = of_find_node_by_name(NULL, "bcsr");
 51         if (np) {
 52                 struct resource res;
 53 
 54                 of_address_to_resource(np, 0, &res);
 55                 bcsr_regs = ioremap(res.start, resource_size(&res));
 56                 of_node_put(np);
 57         }
 58         if (!bcsr_regs)
 59                 return -1;
 60 
 61         /*
 62          * if Processor Board is plugged into PIB board,
 63          * force to use the PHY on Processor Board
 64          */
 65         bcsr5 = in_8(bcsr_regs + 5);
 66         if (!(bcsr5 & BCSR5_INT_USB))
 67                 out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
 68         iounmap(bcsr_regs);
 69         return 0;
 70 }
 71 
 72 /* ************************************************************************
 73  *
 74  * Setup the architecture
 75  *
 76  */
 77 static void __init mpc834x_mds_setup_arch(void)
 78 {
 79         if (ppc_md.progress)
 80                 ppc_md.progress("mpc834x_mds_setup_arch()", 0);
 81 
 82         mpc83xx_setup_pci();
 83 
 84         mpc834xemds_usb_cfg();
 85 }
 86 
 87 machine_device_initcall(mpc834x_mds, mpc83xx_declare_of_platform_devices);
 88 
 89 /*
 90  * Called very early, MMU is off, device-tree isn't unflattened
 91  */
 92 static int __init mpc834x_mds_probe(void)
 93 {
 94         unsigned long root = of_get_flat_dt_root();
 95 
 96         return of_flat_dt_is_compatible(root, "MPC834xMDS");
 97 }
 98 
 99 define_machine(mpc834x_mds) {
100         .name                   = "MPC834x MDS",
101         .probe                  = mpc834x_mds_probe,
102         .setup_arch             = mpc834x_mds_setup_arch,
103         .init_IRQ               = mpc83xx_ipic_init_IRQ,
104         .get_irq                = ipic_get_irq,
105         .restart                = mpc83xx_restart,
106         .time_init              = mpc83xx_time_init,
107         .calibrate_decr         = generic_calibrate_decr,
108         .progress               = udbg_progress,
109 };
110 

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