1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ppa8548 setup and early boot code. 4 * 5 * Copyright 2009 Prodrive B.V.. 6 * 7 * By Stef van Os (see MAINTAINERS for contact information) 8 * 9 * Based on the SBC8548 support - Copyright 2007 Wind River Systems Inc. 10 * Based on the MPC8548CDS support - Copyright 2005 Freescale Inc. 11 */ 12 13 #include <linux/stddef.h> 14 #include <linux/kernel.h> 15 #include <linux/init.h> 16 #include <linux/reboot.h> 17 #include <linux/seq_file.h> 18 #include <linux/of_fdt.h> 19 #include <linux/of_platform.h> 20 21 #include <asm/machdep.h> 22 #include <asm/udbg.h> 23 #include <asm/mpic.h> 24 25 #include <sysdev/fsl_soc.h> 26 27 static void __init ppa8548_pic_init(void) 28 { 29 struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN, 30 0, 256, " OpenPIC "); 31 BUG_ON(mpic == NULL); 32 mpic_init(mpic); 33 } 34 35 /* 36 * Setup the architecture 37 */ 38 static void __init ppa8548_setup_arch(void) 39 { 40 if (ppc_md.progress) 41 ppc_md.progress("ppa8548_setup_arch()", 0); 42 } 43 44 static void ppa8548_show_cpuinfo(struct seq_file *m) 45 { 46 uint32_t svid, phid1; 47 48 svid = mfspr(SPRN_SVR); 49 50 seq_printf(m, "Vendor\t\t: Prodrive B.V.\n"); 51 seq_printf(m, "SVR\t\t: 0x%x\n", svid); 52 53 /* Display cpu Pll setting */ 54 phid1 = mfspr(SPRN_HID1); 55 seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f)); 56 } 57 58 static const struct of_device_id of_bus_ids[] __initconst = { 59 { .name = "soc", }, 60 { .type = "soc", }, 61 { .compatible = "simple-bus", }, 62 { .compatible = "gianfar", }, 63 { .compatible = "fsl,srio", }, 64 {}, 65 }; 66 67 static int __init declare_of_platform_devices(void) 68 { 69 of_platform_bus_probe(NULL, of_bus_ids, NULL); 70 71 return 0; 72 } 73 machine_device_initcall(ppa8548, declare_of_platform_devices); 74 75 /* 76 * Called very early, device-tree isn't unflattened 77 */ 78 static int __init ppa8548_probe(void) 79 { 80 return of_machine_is_compatible("ppa8548"); 81 } 82 83 define_machine(ppa8548) { 84 .name = "ppa8548", 85 .probe = ppa8548_probe, 86 .setup_arch = ppa8548_setup_arch, 87 .init_IRQ = ppa8548_pic_init, 88 .show_cpuinfo = ppa8548_show_cpuinfo, 89 .get_irq = mpic_get_irq, 90 .calibrate_decr = generic_calibrate_decr, 91 .progress = udbg_progress, 92 }; 93