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 const struct of_device_id of_bus_ids[] __initconst = { 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