1 /* 2 * GE Fanuc SBC310 board support 3 * 4 * Author: Martyn Welch <martyn.welch@gefanuc.com> 5 * 6 * Copyright 2008 GE Fanuc Intelligent Platforms Embedded Systems, Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 * 13 * Based on: mpc86xx_hpcn.c (MPC86xx HPCN board specific routines) 14 * Copyright 2006 Freescale Semiconductor Inc. 15 * 16 * NEC fixup adapted from arch/mips/pci/fixup-lm2e.c 17 */ 18 19 #include <linux/stddef.h> 20 #include <linux/kernel.h> 21 #include <linux/pci.h> 22 #include <linux/kdev_t.h> 23 #include <linux/delay.h> 24 #include <linux/seq_file.h> 25 #include <linux/of_platform.h> 26 27 #include <asm/system.h> 28 #include <asm/time.h> 29 #include <asm/machdep.h> 30 #include <asm/pci-bridge.h> 31 #include <asm/mpc86xx.h> 32 #include <asm/prom.h> 33 #include <mm/mmu_decl.h> 34 #include <asm/udbg.h> 35 36 #include <asm/mpic.h> 37 38 #include <sysdev/fsl_pci.h> 39 #include <sysdev/fsl_soc.h> 40 41 #include "mpc86xx.h" 42 #include "gef_pic.h" 43 44 #undef DEBUG 45 46 #ifdef DEBUG 47 #define DBG (fmt...) do { printk(KERN_ERR "SBC310: " fmt); } while (0) 48 #else 49 #define DBG (fmt...) do { } while (0) 50 #endif 51 52 void __iomem *sbc310_regs; 53 54 static void __init gef_sbc310_init_irq(void) 55 { 56 struct device_node *cascade_node = NULL; 57 58 mpc86xx_init_irq(); 59 60 /* 61 * There is a simple interrupt handler in the main FPGA, this needs 62 * to be cascaded into the MPIC 63 */ 64 cascade_node = of_find_compatible_node(NULL, NULL, "gef,fpga-pic"); 65 if (!cascade_node) { 66 printk(KERN_WARNING "SBC310: No FPGA PIC\n"); 67 return; 68 } 69 70 gef_pic_init(cascade_node); 71 of_node_put(cascade_node); 72 } 73 74 static void __init gef_sbc310_setup_arch(void) 75 { 76 struct device_node *regs; 77 #ifdef CONFIG_PCI 78 struct device_node *np; 79 80 for_each_compatible_node(np, "pci", "fsl,mpc8641-pcie") { 81 fsl_add_bridge(np, 1); 82 } 83 #endif 84 85 printk(KERN_INFO "GE Fanuc Intelligent Platforms SBC310 6U VPX SBC\n"); 86 87 #ifdef CONFIG_SMP 88 mpc86xx_smp_init(); 89 #endif 90 91 /* Remap basic board registers */ 92 regs = of_find_compatible_node(NULL, NULL, "gef,fpga-regs"); 93 if (regs) { 94 sbc310_regs = of_iomap(regs, 0); 95 if (sbc310_regs == NULL) 96 printk(KERN_WARNING "Unable to map board registers\n"); 97 of_node_put(regs); 98 } 99 } 100 101 /* Return the PCB revision */ 102 static unsigned int gef_sbc310_get_board_id(void) 103 { 104 unsigned int reg; 105 106 reg = ioread32(sbc310_regs); 107 return reg & 0xff; 108 } 109 110 /* Return the PCB revision */ 111 static unsigned int gef_sbc310_get_pcb_rev(void) 112 { 113 unsigned int reg; 114 115 reg = ioread32(sbc310_regs); 116 return (reg >> 8) & 0xff; 117 } 118 119 /* Return the board (software) revision */ 120 static unsigned int gef_sbc310_get_board_rev(void) 121 { 122 unsigned int reg; 123 124 reg = ioread32(sbc310_regs); 125 return (reg >> 16) & 0xff; 126 } 127 128 /* Return the FPGA revision */ 129 static unsigned int gef_sbc310_get_fpga_rev(void) 130 { 131 unsigned int reg; 132 133 reg = ioread32(sbc310_regs); 134 return (reg >> 24) & 0xf; 135 } 136 137 static void gef_sbc310_show_cpuinfo(struct seq_file *m) 138 { 139 uint svid = mfspr(SPRN_SVR); 140 141 seq_printf(m, "Vendor\t\t: GE Fanuc Intelligent Platforms\n"); 142 143 seq_printf(m, "Board ID\t: 0x%2.2x\n", gef_sbc310_get_board_id()); 144 seq_printf(m, "Revision\t: %u%c\n", gef_sbc310_get_pcb_rev(), 145 ('A' + gef_sbc310_get_board_rev() - 1)); 146 seq_printf(m, "FPGA Revision\t: %u\n", gef_sbc310_get_fpga_rev()); 147 148 seq_printf(m, "SVR\t\t: 0x%x\n", svid); 149 150 } 151 152 static void __init gef_sbc310_nec_fixup(struct pci_dev *pdev) 153 { 154 unsigned int val; 155 156 /* Do not do the fixup on other platforms! */ 157 if (!machine_is(gef_sbc310)) 158 return; 159 160 printk(KERN_INFO "Running NEC uPD720101 Fixup\n"); 161 162 /* Ensure only ports 1 & 2 are enabled */ 163 pci_read_config_dword(pdev, 0xe0, &val); 164 pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x2); 165 166 /* System clock is 48-MHz Oscillator and EHCI Enabled. */ 167 pci_write_config_dword(pdev, 0xe4, 1 << 5); 168 } 169 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB, 170 gef_sbc310_nec_fixup); 171 172 /* 173 * Called very early, device-tree isn't unflattened 174 * 175 * This function is called to determine whether the BSP is compatible with the 176 * supplied device-tree, which is assumed to be the correct one for the actual 177 * board. It is expected thati, in the future, a kernel may support multiple 178 * boards. 179 */ 180 static int __init gef_sbc310_probe(void) 181 { 182 unsigned long root = of_get_flat_dt_root(); 183 184 if (of_flat_dt_is_compatible(root, "gef,sbc310")) 185 return 1; 186 187 return 0; 188 } 189 190 static long __init mpc86xx_time_init(void) 191 { 192 unsigned int temp; 193 194 /* Set the time base to zero */ 195 mtspr(SPRN_TBWL, 0); 196 mtspr(SPRN_TBWU, 0); 197 198 temp = mfspr(SPRN_HID0); 199 temp |= HID0_TBEN; 200 mtspr(SPRN_HID0, temp); 201 asm volatile("isync"); 202 203 return 0; 204 } 205 206 static __initdata struct of_device_id of_bus_ids[] = { 207 { .compatible = "simple-bus", }, 208 { .compatible = "gianfar", }, 209 {}, 210 }; 211 212 static int __init declare_of_platform_devices(void) 213 { 214 printk(KERN_DEBUG "Probe platform devices\n"); 215 of_platform_bus_probe(NULL, of_bus_ids, NULL); 216 217 return 0; 218 } 219 machine_device_initcall(gef_sbc310, declare_of_platform_devices); 220 221 define_machine(gef_sbc310) { 222 .name = "GE Fanuc SBC310", 223 .probe = gef_sbc310_probe, 224 .setup_arch = gef_sbc310_setup_arch, 225 .init_IRQ = gef_sbc310_init_irq, 226 .show_cpuinfo = gef_sbc310_show_cpuinfo, 227 .get_irq = mpic_get_irq, 228 .restart = fsl_rstcr_restart, 229 .time_init = mpc86xx_time_init, 230 .calibrate_decr = generic_calibrate_decr, 231 .progress = udbg_progress, 232 #ifdef CONFIG_PCI 233 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 234 #endif 235 }; 236