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Linux/arch/powerpc/platforms/85xx/ppa8548.c

  1 /*
  2  * ppa8548 setup and early boot code.
  3  *
  4  * Copyright 2009 Prodrive B.V..
  5  *
  6  * By Stef van Os (see MAINTAINERS for contact information)
  7  *
  8  * Based on the SBC8548 support - Copyright 2007 Wind River Systems Inc.
  9  * Based on the MPC8548CDS support - Copyright 2005 Freescale Inc.
 10  *
 11  * This program is free software; you can redistribute  it and/or modify it
 12  * under  the terms of  the GNU General  Public License as published by the
 13  * Free Software Foundation;  either version 2 of the  License, or (at your
 14  * option) any later version.
 15  */
 16 
 17 #include <linux/stddef.h>
 18 #include <linux/kernel.h>
 19 #include <linux/init.h>
 20 #include <linux/reboot.h>
 21 #include <linux/seq_file.h>
 22 #include <linux/of_fdt.h>
 23 #include <linux/of_platform.h>
 24 
 25 #include <asm/machdep.h>
 26 #include <asm/udbg.h>
 27 #include <asm/mpic.h>
 28 
 29 #include <sysdev/fsl_soc.h>
 30 
 31 static void __init ppa8548_pic_init(void)
 32 {
 33         struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
 34                         0, 256, " OpenPIC  ");
 35         BUG_ON(mpic == NULL);
 36         mpic_init(mpic);
 37 }
 38 
 39 /*
 40  * Setup the architecture
 41  */
 42 static void __init ppa8548_setup_arch(void)
 43 {
 44         if (ppc_md.progress)
 45                 ppc_md.progress("ppa8548_setup_arch()", 0);
 46 }
 47 
 48 static void ppa8548_show_cpuinfo(struct seq_file *m)
 49 {
 50         uint32_t svid, phid1;
 51 
 52         svid = mfspr(SPRN_SVR);
 53 
 54         seq_printf(m, "Vendor\t\t: Prodrive B.V.\n");
 55         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 56 
 57         /* Display cpu Pll setting */
 58         phid1 = mfspr(SPRN_HID1);
 59         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 60 }
 61 
 62 static struct of_device_id __initdata of_bus_ids[] = {
 63         { .name = "soc", },
 64         { .type = "soc", },
 65         { .compatible = "simple-bus", },
 66         { .compatible = "gianfar", },
 67         { .compatible = "fsl,srio", },
 68         {},
 69 };
 70 
 71 static int __init declare_of_platform_devices(void)
 72 {
 73         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 74 
 75         return 0;
 76 }
 77 machine_device_initcall(ppa8548, declare_of_platform_devices);
 78 
 79 /*
 80  * Called very early, device-tree isn't unflattened
 81  */
 82 static int __init ppa8548_probe(void)
 83 {
 84         unsigned long root = of_get_flat_dt_root();
 85 
 86         return of_flat_dt_is_compatible(root, "ppa8548");
 87 }
 88 
 89 define_machine(ppa8548) {
 90         .name           = "ppa8548",
 91         .probe          = ppa8548_probe,
 92         .setup_arch     = ppa8548_setup_arch,
 93         .init_IRQ       = ppa8548_pic_init,
 94         .show_cpuinfo   = ppa8548_show_cpuinfo,
 95         .get_irq        = mpic_get_irq,
 96         .restart        = fsl_rstcr_restart,
 97         .calibrate_decr = generic_calibrate_decr,
 98         .progress       = udbg_progress,
 99 };
100 

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