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_platform.h> 21 22 #include <asm/time.h> 23 #include <asm/machdep.h> 24 #include <asm/pci-bridge.h> 25 #include <mm/mmu_decl.h> 26 #include <asm/prom.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 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 fsl_pci_primary = np; 94 } 95 } 96 #endif 97 } 98 99 /* 100 * Setup the architecture 101 */ 102 static void __init ge_imp3a_setup_arch(void) 103 { 104 struct device_node *regs; 105 106 if (ppc_md.progress) 107 ppc_md.progress("ge_imp3a_setup_arch()", 0); 108 109 mpc85xx_smp_init(); 110 111 ge_imp3a_pci_assign_primary(); 112 113 swiotlb_detect_4g(); 114 115 /* Remap basic board registers */ 116 regs = of_find_compatible_node(NULL, NULL, "ge,imp3a-fpga-regs"); 117 if (regs) { 118 imp3a_regs = of_iomap(regs, 0); 119 if (imp3a_regs == NULL) 120 printk(KERN_WARNING "Unable to map board registers\n"); 121 of_node_put(regs); 122 } 123 124 #if defined(CONFIG_MMIO_NVRAM) 125 mmio_nvram_init(); 126 #endif 127 128 printk(KERN_INFO "GE Intelligent Platforms IMP3A 3U cPCI SBC\n"); 129 } 130 131 /* Return the PCB revision */ 132 static unsigned int ge_imp3a_get_pcb_rev(void) 133 { 134 unsigned int reg; 135 136 reg = ioread16(imp3a_regs); 137 return (reg >> 8) & 0xff; 138 } 139 140 /* Return the board (software) revision */ 141 static unsigned int ge_imp3a_get_board_rev(void) 142 { 143 unsigned int reg; 144 145 reg = ioread16(imp3a_regs + 0x2); 146 return reg & 0xff; 147 } 148 149 /* Return the FPGA revision */ 150 static unsigned int ge_imp3a_get_fpga_rev(void) 151 { 152 unsigned int reg; 153 154 reg = ioread16(imp3a_regs + 0x2); 155 return (reg >> 8) & 0xff; 156 } 157 158 /* Return compactPCI Geographical Address */ 159 static unsigned int ge_imp3a_get_cpci_geo_addr(void) 160 { 161 unsigned int reg; 162 163 reg = ioread16(imp3a_regs + 0x6); 164 return (reg & 0x0f00) >> 8; 165 } 166 167 /* Return compactPCI System Controller Status */ 168 static unsigned int ge_imp3a_get_cpci_is_syscon(void) 169 { 170 unsigned int reg; 171 172 reg = ioread16(imp3a_regs + 0x6); 173 return reg & (1 << 12); 174 } 175 176 static void ge_imp3a_show_cpuinfo(struct seq_file *m) 177 { 178 seq_printf(m, "Vendor\t\t: GE Intelligent Platforms\n"); 179 180 seq_printf(m, "Revision\t: %u%c\n", ge_imp3a_get_pcb_rev(), 181 ('A' + ge_imp3a_get_board_rev() - 1)); 182 183 seq_printf(m, "FPGA Revision\t: %u\n", ge_imp3a_get_fpga_rev()); 184 185 seq_printf(m, "cPCI geo. addr\t: %u\n", ge_imp3a_get_cpci_geo_addr()); 186 187 seq_printf(m, "cPCI syscon\t: %s\n", 188 ge_imp3a_get_cpci_is_syscon() ? "yes" : "no"); 189 } 190 191 /* 192 * Called very early, device-tree isn't unflattened 193 */ 194 static int __init ge_imp3a_probe(void) 195 { 196 return of_machine_is_compatible("ge,IMP3A"); 197 } 198 199 machine_arch_initcall(ge_imp3a, mpc85xx_common_publish_devices); 200 201 define_machine(ge_imp3a) { 202 .name = "GE_IMP3A", 203 .probe = ge_imp3a_probe, 204 .setup_arch = ge_imp3a_setup_arch, 205 .init_IRQ = ge_imp3a_pic_init, 206 .show_cpuinfo = ge_imp3a_show_cpuinfo, 207 #ifdef CONFIG_PCI 208 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 209 .pcibios_fixup_phb = fsl_pcibios_fixup_phb, 210 #endif 211 .get_irq = mpic_get_irq, 212 .calibrate_decr = generic_calibrate_decr, 213 .progress = udbg_progress, 214 }; 215