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_platform.h> 23 24 #include <asm/machdep.h> 25 #include <asm/udbg.h> 26 #include <asm/mpic.h> 27 28 #include <sysdev/fsl_soc.h> 29 30 static void __init ppa8548_pic_init(void) 31 { 32 struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN, 33 0, 256, " OpenPIC "); 34 BUG_ON(mpic == NULL); 35 mpic_init(mpic); 36 } 37 38 /* 39 * Setup the architecture 40 */ 41 static void __init ppa8548_setup_arch(void) 42 { 43 if (ppc_md.progress) 44 ppc_md.progress("ppa8548_setup_arch()", 0); 45 } 46 47 static void ppa8548_show_cpuinfo(struct seq_file *m) 48 { 49 uint32_t svid, phid1; 50 51 svid = mfspr(SPRN_SVR); 52 53 seq_printf(m, "Vendor\t\t: Prodrive B.V.\n"); 54 seq_printf(m, "SVR\t\t: 0x%x\n", svid); 55 56 /* Display cpu Pll setting */ 57 phid1 = mfspr(SPRN_HID1); 58 seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f)); 59 } 60 61 static struct of_device_id __initdata of_bus_ids[] = { 62 { .name = "soc", }, 63 { .type = "soc", }, 64 { .compatible = "simple-bus", }, 65 { .compatible = "gianfar", }, 66 { .compatible = "fsl,srio", }, 67 {}, 68 }; 69 70 static int __init declare_of_platform_devices(void) 71 { 72 of_platform_bus_probe(NULL, of_bus_ids, NULL); 73 74 return 0; 75 } 76 machine_device_initcall(ppa8548, declare_of_platform_devices); 77 78 /* 79 * Called very early, device-tree isn't unflattened 80 */ 81 static int __init ppa8548_probe(void) 82 { 83 unsigned long root = of_get_flat_dt_root(); 84 85 return of_flat_dt_is_compatible(root, "ppa8548"); 86 } 87 88 define_machine(ppa8548) { 89 .name = "ppa8548", 90 .probe = ppa8548_probe, 91 .setup_arch = ppa8548_setup_arch, 92 .init_IRQ = ppa8548_pic_init, 93 .show_cpuinfo = ppa8548_show_cpuinfo, 94 .get_irq = mpic_get_irq, 95 .restart = fsl_rstcr_restart, 96 .calibrate_decr = generic_calibrate_decr, 97 .progress = udbg_progress, 98 }; 99