1 /* 2 * Board setup routines for the Emerson/Artesyn MVME7100 3 * 4 * Copyright 2016 Elettra-Sincrotrone Trieste S.C.p.A. 5 * 6 * Author: Alessio Igor Bogani <alessio.bogani@elettra.eu> 7 * 8 * Based on earlier code by: 9 * 10 * Ajit Prem <ajit.prem@emerson.com> 11 * Copyright 2008 Emerson 12 * 13 * USB host fixup is borrowed by: 14 * 15 * Martyn Welch <martyn.welch@ge.com> 16 * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc. 17 * 18 * This program is free software; you can redistribute it and/or modify it 19 * under the terms of the GNU General Public License as published by the 20 * Free Software Foundation; either version 2 of the License, or (at your 21 * option) any later version. 22 * 23 */ 24 25 #include <linux/pci.h> 26 #include <linux/of.h> 27 #include <linux/of_platform.h> 28 #include <linux/of_address.h> 29 #include <asm/udbg.h> 30 #include <asm/mpic.h> 31 #include <sysdev/fsl_soc.h> 32 #include <sysdev/fsl_pci.h> 33 34 #include "mpc86xx.h" 35 36 #define MVME7100_INTERRUPT_REG_2_OFFSET 0x05 37 #define MVME7100_DS1375_MASK 0x40 38 #define MVME7100_MAX6649_MASK 0x20 39 #define MVME7100_ABORT_MASK 0x10 40 41 /* 42 * Setup the architecture 43 */ 44 static void __init mvme7100_setup_arch(void) 45 { 46 struct device_node *bcsr_node; 47 void __iomem *mvme7100_regs = NULL; 48 u8 reg; 49 50 if (ppc_md.progress) 51 ppc_md.progress("mvme7100_setup_arch()", 0); 52 53 #ifdef CONFIG_SMP 54 mpc86xx_smp_init(); 55 #endif 56 57 fsl_pci_assign_primary(); 58 59 /* Remap BCSR registers */ 60 bcsr_node = of_find_compatible_node(NULL, NULL, 61 "artesyn,mvme7100-bcsr"); 62 if (bcsr_node) { 63 mvme7100_regs = of_iomap(bcsr_node, 0); 64 of_node_put(bcsr_node); 65 } 66 67 if (mvme7100_regs) { 68 /* Disable ds1375, max6649, and abort interrupts */ 69 reg = readb(mvme7100_regs + MVME7100_INTERRUPT_REG_2_OFFSET); 70 reg |= MVME7100_DS1375_MASK | MVME7100_MAX6649_MASK 71 | MVME7100_ABORT_MASK; 72 writeb(reg, mvme7100_regs + MVME7100_INTERRUPT_REG_2_OFFSET); 73 } else 74 pr_warn("Unable to map board registers\n"); 75 76 pr_info("MVME7100 board from Artesyn\n"); 77 } 78 79 /* 80 * Called very early, device-tree isn't unflattened 81 */ 82 static int __init mvme7100_probe(void) 83 { 84 unsigned long root = of_get_flat_dt_root(); 85 86 return of_flat_dt_is_compatible(root, "artesyn,MVME7100"); 87 } 88 89 static void mvme7100_usb_host_fixup(struct pci_dev *pdev) 90 { 91 unsigned int val; 92 93 if (!machine_is(mvme7100)) 94 return; 95 96 /* Ensure only ports 1 & 2 are enabled */ 97 pci_read_config_dword(pdev, 0xe0, &val); 98 pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x2); 99 100 /* System clock is 48-MHz Oscillator and EHCI Enabled. */ 101 pci_write_config_dword(pdev, 0xe4, 1 << 5); 102 } 103 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB, 104 mvme7100_usb_host_fixup); 105 106 machine_arch_initcall(mvme7100, mpc86xx_common_publish_devices); 107 108 define_machine(mvme7100) { 109 .name = "MVME7100", 110 .probe = mvme7100_probe, 111 .setup_arch = mvme7100_setup_arch, 112 .init_IRQ = mpc86xx_init_irq, 113 .get_irq = mpic_get_irq, 114 .time_init = mpc86xx_time_init, 115 .calibrate_decr = generic_calibrate_decr, 116 .progress = udbg_progress, 117 #ifdef CONFIG_PCI 118 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 119 #endif 120 }; 121