arch/powerpc/platforms/86xx/gef_sbc610.c

   1 /*
   2  * GE SBC610 board support
   3  *
   4  * Author: Martyn Welch <martyn.welch@ge.com>
   5  *
   6  * Copyright 2008 GE 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/time.h>
  28 #include <asm/machdep.h>
  29 #include <asm/pci-bridge.h>
  30 #include <asm/prom.h>
  31 #include <mm/mmu_decl.h>
  32 #include <asm/udbg.h>
  33
  34 #include <asm/mpic.h>
  35 #include <asm/nvram.h>
  36
  37 #include <sysdev/fsl_pci.h>
  38 #include <sysdev/fsl_soc.h>
  39 #include <sysdev/ge/ge_pic.h>
  40
  41 #include "mpc86xx.h"
  42
  43 #undef DEBUG
  44
  45 #ifdef DEBUG
  46 #define DBG (fmt...) do { printk(KERN_ERR "SBC610: " fmt); } while (0)
  47 #else
  48 #define DBG (fmt...) do { } while (0)
  49 #endif
  50
  51 void __iomem *sbc610_regs;
  52
  53 static void __init gef_sbc610_init_irq(void)
  54 {
  55         struct device_node *cascade_node = NULL;
  56
  57         mpc86xx_init_irq();
  58
  59         /*
  60          * There is a simple interrupt handler in the main FPGA, this needs
  61          * to be cascaded into the MPIC
  62          */
  63         cascade_node = of_find_compatible_node(NULL, NULL, "gef,fpga-pic");
  64         if (!cascade_node) {
  65                 printk(KERN_WARNING "SBC610: No FPGA PIC\n");
  66                 return;
  67         }
  68
  69         gef_pic_init(cascade_node);
  70         of_node_put(cascade_node);
  71 }
  72
  73 static void __init gef_sbc610_setup_arch(void)
  74 {
  75         struct device_node *regs;
  76
  77         printk(KERN_INFO "GE Intelligent Platforms SBC610 6U VPX SBC\n");
  78
  79 #ifdef CONFIG_SMP
  80         mpc86xx_smp_init();
  81 #endif
  82
  83         fsl_pci_assign_primary();
  84
  85         /* Remap basic board registers */
  86         regs = of_find_compatible_node(NULL, NULL, "gef,fpga-regs");
  87         if (regs) {
  88                 sbc610_regs = of_iomap(regs, 0);
  89                 if (sbc610_regs == NULL)
  90                         printk(KERN_WARNING "Unable to map board registers\n");
  91                 of_node_put(regs);
  92         }
  93
  94 #if defined(CONFIG_MMIO_NVRAM)
  95         mmio_nvram_init();
  96 #endif
  97 }
  98
  99 /* Return the PCB revision */
 100 static unsigned int gef_sbc610_get_pcb_rev(void)
 101 {
 102         unsigned int reg;
 103
 104         reg = ioread32(sbc610_regs);
 105         return (reg >> 8) & 0xff;
 106 }
 107
 108 /* Return the board (software) revision */
 109 static unsigned int gef_sbc610_get_board_rev(void)
 110 {
 111         unsigned int reg;
 112
 113         reg = ioread32(sbc610_regs);
 114         return (reg >> 16) & 0xff;
 115 }
 116
 117 /* Return the FPGA revision */
 118 static unsigned int gef_sbc610_get_fpga_rev(void)
 119 {
 120         unsigned int reg;
 121
 122         reg = ioread32(sbc610_regs);
 123         return (reg >> 24) & 0xf;
 124 }
 125
 126 static void gef_sbc610_show_cpuinfo(struct seq_file *m)
 127 {
 128         uint svid = mfspr(SPRN_SVR);
 129
 130         seq_printf(m, "Vendor\t\t: GE Intelligent Platforms\n");
 131
 132         seq_printf(m, "Revision\t: %u%c\n", gef_sbc610_get_pcb_rev(),
 133                 ('A' + gef_sbc610_get_board_rev() - 1));
 134         seq_printf(m, "FPGA Revision\t: %u\n", gef_sbc610_get_fpga_rev());
 135
 136         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 137 }
 138
 139 static void gef_sbc610_nec_fixup(struct pci_dev *pdev)
 140 {
 141         unsigned int val;
 142
 143         /* Do not do the fixup on other platforms! */
 144         if (!machine_is(gef_sbc610))
 145                 return;
 146
 147         printk(KERN_INFO "Running NEC uPD720101 Fixup\n");
 148
 149         /* Ensure ports 1, 2, 3, 4 & 5 are enabled */
 150         pci_read_config_dword(pdev, 0xe0, &val);
 151         pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x5);
 152
 153         /* System clock is 48-MHz Oscillator and EHCI Enabled. */
 154         pci_write_config_dword(pdev, 0xe4, 1 << 5);
 155 }
 156 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
 157         gef_sbc610_nec_fixup);
 158
 159 /*
 160  * Called very early, device-tree isn't unflattened
 161  *
 162  * This function is called to determine whether the BSP is compatible with the
 163  * supplied device-tree, which is assumed to be the correct one for the actual
 164  * board. It is expected thati, in the future, a kernel may support multiple
 165  * boards.
 166  */
 167 static int __init gef_sbc610_probe(void)
 168 {
 169         if (of_machine_is_compatible("gef,sbc610"))
 170                 return 1;
 171
 172         return 0;
 173 }
 174
 175 machine_arch_initcall(gef_sbc610, mpc86xx_common_publish_devices);
 176
 177 define_machine(gef_sbc610) {
 178         .name                   = "GE SBC610",
 179         .probe                  = gef_sbc610_probe,
 180         .setup_arch             = gef_sbc610_setup_arch,
 181         .init_IRQ               = gef_sbc610_init_irq,
 182         .show_cpuinfo           = gef_sbc610_show_cpuinfo,
 183         .get_irq                = mpic_get_irq,
 184         .time_init              = mpc86xx_time_init,
 185         .calibrate_decr         = generic_calibrate_decr,
 186         .progress               = udbg_progress,
 187 #ifdef CONFIG_PCI
 188         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 189 #endif
 190 };