1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * GE PPC9A 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_platform.h> 22 23 #include <asm/time.h> 24 #include <asm/machdep.h> 25 #include <asm/pci-bridge.h> 26 #include <asm/prom.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 "PPC9A: " fmt); } while (0) 43 #else 44 #define DBG (fmt...) do { } while (0) 45 #endif 46 47 void __iomem *ppc9a_regs; 48 49 static void __init gef_ppc9a_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-1.00"); 60 if (!cascade_node) { 61 printk(KERN_WARNING "PPC9A: 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_ppc9a_setup_arch(void) 70 { 71 struct device_node *regs; 72 73 printk(KERN_INFO "GE Intelligent Platforms PPC9A 6U VME SBC\n"); 74 75 #ifdef CONFIG_SMP 76 mpc86xx_smp_init(); 77 #endif 78 79 fsl_pci_assign_primary(); 80 81 /* Remap basic board registers */ 82 regs = of_find_compatible_node(NULL, NULL, "gef,ppc9a-fpga-regs"); 83 if (regs) { 84 ppc9a_regs = of_iomap(regs, 0); 85 if (ppc9a_regs == NULL) 86 printk(KERN_WARNING "Unable to map board registers\n"); 87 of_node_put(regs); 88 } 89 90 #if defined(CONFIG_MMIO_NVRAM) 91 mmio_nvram_init(); 92 #endif 93 } 94 95 /* Return the PCB revision */ 96 static unsigned int gef_ppc9a_get_pcb_rev(void) 97 { 98 unsigned int reg; 99 100 reg = ioread32be(ppc9a_regs); 101 return (reg >> 16) & 0xff; 102 } 103 104 /* Return the board (software) revision */ 105 static unsigned int gef_ppc9a_get_board_rev(void) 106 { 107 unsigned int reg; 108 109 reg = ioread32be(ppc9a_regs); 110 return (reg >> 8) & 0xff; 111 } 112 113 /* Return the FPGA revision */ 114 static unsigned int gef_ppc9a_get_fpga_rev(void) 115 { 116 unsigned int reg; 117 118 reg = ioread32be(ppc9a_regs); 119 return reg & 0xf; 120 } 121 122 /* Return VME Geographical Address */ 123 static unsigned int gef_ppc9a_get_vme_geo_addr(void) 124 { 125 unsigned int reg; 126 127 reg = ioread32be(ppc9a_regs + 0x4); 128 return reg & 0x1f; 129 } 130 131 /* Return VME System Controller Status */ 132 static unsigned int gef_ppc9a_get_vme_is_syscon(void) 133 { 134 unsigned int reg; 135 136 reg = ioread32be(ppc9a_regs + 0x4); 137 return (reg >> 9) & 0x1; 138 } 139 140 static void gef_ppc9a_show_cpuinfo(struct seq_file *m) 141 { 142 uint svid = mfspr(SPRN_SVR); 143 144 seq_printf(m, "Vendor\t\t: GE Intelligent Platforms\n"); 145 146 seq_printf(m, "Revision\t: %u%c\n", gef_ppc9a_get_pcb_rev(), 147 ('A' + gef_ppc9a_get_board_rev())); 148 seq_printf(m, "FPGA Revision\t: %u\n", gef_ppc9a_get_fpga_rev()); 149 150 seq_printf(m, "SVR\t\t: 0x%x\n", svid); 151 152 seq_printf(m, "VME geo. addr\t: %u\n", gef_ppc9a_get_vme_geo_addr()); 153 154 seq_printf(m, "VME syscon\t: %s\n", 155 gef_ppc9a_get_vme_is_syscon() ? "yes" : "no"); 156 } 157 158 static void gef_ppc9a_nec_fixup(struct pci_dev *pdev) 159 { 160 unsigned int val; 161 162 /* Do not do the fixup on other platforms! */ 163 if (!machine_is(gef_ppc9a)) 164 return; 165 166 printk(KERN_INFO "Running NEC uPD720101 Fixup\n"); 167 168 /* Ensure ports 1, 2, 3, 4 & 5 are enabled */ 169 pci_read_config_dword(pdev, 0xe0, &val); 170 pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x5); 171 172 /* System clock is 48-MHz Oscillator and EHCI Enabled. */ 173 pci_write_config_dword(pdev, 0xe4, 1 << 5); 174 } 175 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB, 176 gef_ppc9a_nec_fixup); 177 178 /* 179 * Called very early, device-tree isn't unflattened 180 * 181 * This function is called to determine whether the BSP is compatible with the 182 * supplied device-tree, which is assumed to be the correct one for the actual 183 * board. It is expected thati, in the future, a kernel may support multiple 184 * boards. 185 */ 186 static int __init gef_ppc9a_probe(void) 187 { 188 if (of_machine_is_compatible("gef,ppc9a")) 189 return 1; 190 191 return 0; 192 } 193 194 machine_arch_initcall(gef_ppc9a, mpc86xx_common_publish_devices); 195 196 define_machine(gef_ppc9a) { 197 .name = "GE PPC9A", 198 .probe = gef_ppc9a_probe, 199 .setup_arch = gef_ppc9a_setup_arch, 200 .init_IRQ = gef_ppc9a_init_irq, 201 .show_cpuinfo = gef_ppc9a_show_cpuinfo, 202 .get_irq = mpic_get_irq, 203 .time_init = mpc86xx_time_init, 204 .calibrate_decr = generic_calibrate_decr, 205 .progress = udbg_progress, 206 #ifdef CONFIG_PCI 207 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 208 #endif 209 }; 210