1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * GE IMP3A Board Setup 4 * 5 * Author Martyn Welch <martyn.welch@ge.com> 6 * 7 * Copyright 2010 GE Intelligent Platforms Embedded Systems, Inc. 8 * 9 * Based on: mpc85xx_ds.c (MPC85xx DS Board Setup) 10 * Copyright 2007 Freescale Semiconductor Inc. 11 */ 12 13 #include <linux/stddef.h> 14 #include <linux/kernel.h> 15 #include <linux/pci.h> 16 #include <linux/kdev_t.h> 17 #include <linux/delay.h> 18 #include <linux/seq_file.h> 19 #include <linux/interrupt.h> 20 #include <linux/of.h> 21 #include <linux/of_address.h> 22 23 #include <asm/time.h> 24 #include <asm/machdep.h> 25 #include <asm/pci-bridge.h> 26 #include <mm/mmu_decl.h> 27 #include <asm/udbg.h> 28 #include <asm/mpic.h> 29 #include <asm/swiotlb.h> 30 #include <asm/nvram.h> 31 32 #include <sysdev/fsl_soc.h> 33 #include <sysdev/fsl_pci.h> 34 #include "smp.h" 35 36 #include "mpc85xx.h" 37 #include <sysdev/ge/ge_pic.h> 38 39 void __iomem *imp3a_regs; 40 41 static void __init ge_imp3a_pic_init(void) 42 { 43 struct mpic *mpic; 44 struct device_node *np; 45 struct device_node *cascade_node = NULL; 46 47 if (of_machine_is_compatible("fsl,MPC8572DS-CAMP")) { 48 mpic = mpic_alloc(NULL, 0, 49 MPIC_NO_RESET | 50 MPIC_BIG_ENDIAN | 51 MPIC_SINGLE_DEST_CPU, 52 0, 256, " OpenPIC "); 53 } else { 54 mpic = mpic_alloc(NULL, 0, 55 MPIC_BIG_ENDIAN | 56 MPIC_SINGLE_DEST_CPU, 57 0, 256, " OpenPIC "); 58 } 59 60 BUG_ON(mpic == NULL); 61 mpic_init(mpic); 62 /* 63 * There is a simple interrupt handler in the main FPGA, this needs 64 * to be cascaded into the MPIC 65 */ 66 for_each_node_by_type(np, "interrupt-controller") 67 if (of_device_is_compatible(np, "gef,fpga-pic-1.00")) { 68 cascade_node = np; 69 break; 70 } 71 72 if (cascade_node == NULL) { 73 printk(KERN_WARNING "IMP3A: No FPGA PIC\n"); 74 return; 75 } 76 77 gef_pic_init(cascade_node); 78 of_node_put(cascade_node); 79 } 80 81 static void __init ge_imp3a_pci_assign_primary(void) 82 { 83 #ifdef CONFIG_PCI 84 struct device_node *np; 85 struct resource rsrc; 86 87 for_each_node_by_type(np, "pci") { 88 if (of_device_is_compatible(np, "fsl,mpc8540-pci") || 89 of_device_is_compatible(np, "fsl,mpc8548-pcie") || 90 of_device_is_compatible(np, "fsl,p2020-pcie")) { 91 of_address_to_resource(np, 0, &rsrc); 92 if ((rsrc.start & 0xfffff) == 0x9000) { 93 of_node_put(fsl_pci_primary); 94 fsl_pci_primary = of_node_get(np); 95 } 96 } 97 } 98 #endif 99 } 100 101 /* 102 * Setup the architecture 103 */ 104 static void __init ge_imp3a_setup_arch(void) 105 { 106 struct device_node *regs; 107 108 if (ppc_md.progress) 109 ppc_md.progress("ge_imp3a_setup_arch()", 0); 110 111 mpc85xx_smp_init(); 112 113 ge_imp3a_pci_assign_primary(); 114 115 swiotlb_detect_4g(); 116 117 /* Remap basic board registers */ 118 regs = of_find_compatible_node(NULL, NULL, "ge,imp3a-fpga-regs"); 119 if (regs) { 120 imp3a_regs = of_iomap(regs, 0); 121 if (imp3a_regs == NULL) 122 printk(KERN_WARNING "Unable to map board registers\n"); 123 of_node_put(regs); 124 } 125 126 #if defined(CONFIG_MMIO_NVRAM) 127 mmio_nvram_init(); 128 #endif 129 130 printk(KERN_INFO "GE Intelligent Platforms IMP3A 3U cPCI SBC\n"); 131 } 132 133 /* Return the PCB revision */ 134 static unsigned int ge_imp3a_get_pcb_rev(void) 135 { 136 unsigned int reg; 137 138 reg = ioread16(imp3a_regs); 139 return (reg >> 8) & 0xff; 140 } 141 142 /* Return the board (software) revision */ 143 static unsigned int ge_imp3a_get_board_rev(void) 144 { 145 unsigned int reg; 146 147 reg = ioread16(imp3a_regs + 0x2); 148 return reg & 0xff; 149 } 150 151 /* Return the FPGA revision */ 152 static unsigned int ge_imp3a_get_fpga_rev(void) 153 { 154 unsigned int reg; 155 156 reg = ioread16(imp3a_regs + 0x2); 157 return (reg >> 8) & 0xff; 158 } 159 160 /* Return compactPCI Geographical Address */ 161 static unsigned int ge_imp3a_get_cpci_geo_addr(void) 162 { 163 unsigned int reg; 164 165 reg = ioread16(imp3a_regs + 0x6); 166 return (reg & 0x0f00) >> 8; 167 } 168 169 /* Return compactPCI System Controller Status */ 170 static unsigned int ge_imp3a_get_cpci_is_syscon(void) 171 { 172 unsigned int reg; 173 174 reg = ioread16(imp3a_regs + 0x6); 175 return reg & (1 << 12); 176 } 177 178 static void ge_imp3a_show_cpuinfo(struct seq_file *m) 179 { 180 seq_printf(m, "Vendor\t\t: GE Intelligent Platforms\n"); 181 182 seq_printf(m, "Revision\t: %u%c\n", ge_imp3a_get_pcb_rev(), 183 ('A' + ge_imp3a_get_board_rev() - 1)); 184 185 seq_printf(m, "FPGA Revision\t: %u\n", ge_imp3a_get_fpga_rev()); 186 187 seq_printf(m, "cPCI geo. addr\t: %u\n", ge_imp3a_get_cpci_geo_addr()); 188 189 seq_printf(m, "cPCI syscon\t: %s\n", 190 ge_imp3a_get_cpci_is_syscon() ? "yes" : "no"); 191 } 192 193 machine_arch_initcall(ge_imp3a, mpc85xx_common_publish_devices); 194 195 define_machine(ge_imp3a) { 196 .name = "GE_IMP3A", 197 .compatible = "ge,IMP3A", 198 .setup_arch = ge_imp3a_setup_arch, 199 .init_IRQ = ge_imp3a_pic_init, 200 .show_cpuinfo = ge_imp3a_show_cpuinfo, 201 #ifdef CONFIG_PCI 202 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 203 .pcibios_fixup_phb = fsl_pcibios_fixup_phb, 204 #endif 205 .get_irq = mpic_get_irq, 206 .progress = udbg_progress, 207 }; 208