1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * GE SBC310 board support 4 * 5 * Author: Martyn Welch <martyn.welch@ge.com> 6 * 7 * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc. 8 * 9 * Based on: mpc86xx_hpcn.c (MPC86xx HPCN board specific routines) 10 * Copyright 2006 Freescale Semiconductor Inc. 11 * 12 * NEC fixup adapted from arch/mips/pci/fixup-lm2e.c 13 */ 14 15 #include <linux/stddef.h> 16 #include <linux/kernel.h> 17 #include <linux/pci.h> 18 #include <linux/kdev_t.h> 19 #include <linux/delay.h> 20 #include <linux/seq_file.h> 21 #include <linux/of_address.h> 22 #include <linux/of_platform.h> 23 24 #include <asm/time.h> 25 #include <asm/machdep.h> 26 #include <asm/pci-bridge.h> 27 #include <mm/mmu_decl.h> 28 #include <asm/udbg.h> 29 30 #include <asm/mpic.h> 31 #include <asm/nvram.h> 32 33 #include <sysdev/fsl_pci.h> 34 #include <sysdev/fsl_soc.h> 35 #include <sysdev/ge/ge_pic.h> 36 37 #include "mpc86xx.h" 38 39 #undef DEBUG 40 41 #ifdef DEBUG 42 #define DBG (fmt...) do { printk(KERN_ERR "SBC310: " fmt); } while (0) 43 #else 44 #define DBG (fmt...) do { } while (0) 45 #endif 46 47 void __iomem *sbc310_regs; 48 49 static void __init gef_sbc310_init_irq(void) 50 { 51 struct device_node *cascade_node = NULL; 52 53 mpc86xx_init_irq(); 54 55 /* 56 * There is a simple interrupt handler in the main FPGA, this needs 57 * to be cascaded into the MPIC 58 */ 59 cascade_node = of_find_compatible_node(NULL, NULL, "gef,fpga-pic"); 60 if (!cascade_node) { 61 printk(KERN_WARNING "SBC310: No FPGA PIC\n"); 62 return; 63 } 64 65 gef_pic_init(cascade_node); 66 of_node_put(cascade_node); 67 } 68 69 static void __init gef_sbc310_setup_arch(void) 70 { 71 struct device_node *regs; 72 printk(KERN_INFO "GE Intelligent Platforms SBC310 6U VPX SBC\n"); 73 74 #ifdef CONFIG_SMP 75 mpc86xx_smp_init(); 76 #endif 77 78 fsl_pci_assign_primary(); 79 80 /* Remap basic board registers */ 81 regs = of_find_compatible_node(NULL, NULL, "gef,fpga-regs"); 82 if (regs) { 83 sbc310_regs = of_iomap(regs, 0); 84 if (sbc310_regs == NULL) 85 printk(KERN_WARNING "Unable to map board registers\n"); 86 of_node_put(regs); 87 } 88 89 #if defined(CONFIG_MMIO_NVRAM) 90 mmio_nvram_init(); 91 #endif 92 } 93 94 /* Return the PCB revision */ 95 static unsigned int gef_sbc310_get_board_id(void) 96 { 97 unsigned int reg; 98 99 reg = ioread32(sbc310_regs); 100 return reg & 0xff; 101 } 102 103 /* Return the PCB revision */ 104 static unsigned int gef_sbc310_get_pcb_rev(void) 105 { 106 unsigned int reg; 107 108 reg = ioread32(sbc310_regs); 109 return (reg >> 8) & 0xff; 110 } 111 112 /* Return the board (software) revision */ 113 static unsigned int gef_sbc310_get_board_rev(void) 114 { 115 unsigned int reg; 116 117 reg = ioread32(sbc310_regs); 118 return (reg >> 16) & 0xff; 119 } 120 121 /* Return the FPGA revision */ 122 static unsigned int gef_sbc310_get_fpga_rev(void) 123 { 124 unsigned int reg; 125 126 reg = ioread32(sbc310_regs); 127 return (reg >> 24) & 0xf; 128 } 129 130 static void gef_sbc310_show_cpuinfo(struct seq_file *m) 131 { 132 uint svid = mfspr(SPRN_SVR); 133 134 seq_printf(m, "Vendor\t\t: GE Intelligent Platforms\n"); 135 136 seq_printf(m, "Board ID\t: 0x%2.2x\n", gef_sbc310_get_board_id()); 137 seq_printf(m, "Revision\t: %u%c\n", gef_sbc310_get_pcb_rev(), 138 ('A' + gef_sbc310_get_board_rev() - 1)); 139 seq_printf(m, "FPGA Revision\t: %u\n", gef_sbc310_get_fpga_rev()); 140 141 seq_printf(m, "SVR\t\t: 0x%x\n", svid); 142 143 } 144 145 static void gef_sbc310_nec_fixup(struct pci_dev *pdev) 146 { 147 unsigned int val; 148 149 /* Do not do the fixup on other platforms! */ 150 if (!machine_is(gef_sbc310)) 151 return; 152 153 printk(KERN_INFO "Running NEC uPD720101 Fixup\n"); 154 155 /* Ensure only ports 1 & 2 are enabled */ 156 pci_read_config_dword(pdev, 0xe0, &val); 157 pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x2); 158 159 /* System clock is 48-MHz Oscillator and EHCI Enabled. */ 160 pci_write_config_dword(pdev, 0xe4, 1 << 5); 161 } 162 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB, 163 gef_sbc310_nec_fixup); 164 165 /* 166 * Called very early, device-tree isn't unflattened 167 * 168 * This function is called to determine whether the BSP is compatible with the 169 * supplied device-tree, which is assumed to be the correct one for the actual 170 * board. It is expected that, in the future, a kernel may support multiple 171 * boards. 172 */ 173 static int __init gef_sbc310_probe(void) 174 { 175 if (of_machine_is_compatible("gef,sbc310")) 176 return 1; 177 178 return 0; 179 } 180 181 machine_arch_initcall(gef_sbc310, mpc86xx_common_publish_devices); 182 183 define_machine(gef_sbc310) { 184 .name = "GE SBC310", 185 .probe = gef_sbc310_probe, 186 .setup_arch = gef_sbc310_setup_arch, 187 .init_IRQ = gef_sbc310_init_irq, 188 .show_cpuinfo = gef_sbc310_show_cpuinfo, 189 .get_irq = mpic_get_irq, 190 .time_init = mpc86xx_time_init, 191 .calibrate_decr = generic_calibrate_decr, 192 .progress = udbg_progress, 193 #ifdef CONFIG_PCI 194 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 195 #endif 196 }; 197