224 lines
5.1 KiB
C
224 lines
5.1 KiB
C
/*
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* GE Fanuc SBC610 board support
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*
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* Author: Martyn Welch <martyn.welch@gefanuc.com>
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*
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* Copyright 2008 GE Fanuc Intelligent Platforms Embedded Systems, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* Based on: mpc86xx_hpcn.c (MPC86xx HPCN board specific routines)
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* Copyright 2006 Freescale Semiconductor Inc.
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*
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* NEC fixup adapted from arch/mips/pci/fixup-lm2e.c
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*/
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/kdev_t.h>
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#include <linux/delay.h>
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#include <linux/seq_file.h>
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#include <linux/of_platform.h>
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#include <asm/system.h>
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#include <asm/time.h>
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#include <asm/machdep.h>
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#include <asm/pci-bridge.h>
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#include <asm/prom.h>
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#include <mm/mmu_decl.h>
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#include <asm/udbg.h>
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#include <asm/mpic.h>
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#include <sysdev/fsl_pci.h>
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#include <sysdev/fsl_soc.h>
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#include "mpc86xx.h"
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#include "gef_pic.h"
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#undef DEBUG
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#ifdef DEBUG
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#define DBG (fmt...) do { printk(KERN_ERR "SBC610: " fmt); } while (0)
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#else
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#define DBG (fmt...) do { } while (0)
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#endif
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void __iomem *sbc610_regs;
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static void __init gef_sbc610_init_irq(void)
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{
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struct device_node *cascade_node = NULL;
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mpc86xx_init_irq();
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/*
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* There is a simple interrupt handler in the main FPGA, this needs
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* to be cascaded into the MPIC
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*/
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cascade_node = of_find_compatible_node(NULL, NULL, "gef,fpga-pic");
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if (!cascade_node) {
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printk(KERN_WARNING "SBC610: No FPGA PIC\n");
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return;
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}
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gef_pic_init(cascade_node);
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of_node_put(cascade_node);
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}
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static void __init gef_sbc610_setup_arch(void)
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{
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struct device_node *regs;
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#ifdef CONFIG_PCI
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struct device_node *np;
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for_each_compatible_node(np, "pci", "fsl,mpc8641-pcie") {
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fsl_add_bridge(np, 1);
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}
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#endif
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printk(KERN_INFO "GE Fanuc Intelligent Platforms SBC610 6U VPX SBC\n");
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#ifdef CONFIG_SMP
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mpc86xx_smp_init();
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#endif
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/* Remap basic board registers */
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regs = of_find_compatible_node(NULL, NULL, "gef,fpga-regs");
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if (regs) {
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sbc610_regs = of_iomap(regs, 0);
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if (sbc610_regs == NULL)
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printk(KERN_WARNING "Unable to map board registers\n");
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of_node_put(regs);
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}
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}
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/* Return the PCB revision */
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static unsigned int gef_sbc610_get_pcb_rev(void)
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{
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unsigned int reg;
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reg = ioread32(sbc610_regs);
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return (reg >> 8) & 0xff;
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}
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/* Return the board (software) revision */
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static unsigned int gef_sbc610_get_board_rev(void)
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{
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unsigned int reg;
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reg = ioread32(sbc610_regs);
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return (reg >> 16) & 0xff;
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}
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/* Return the FPGA revision */
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static unsigned int gef_sbc610_get_fpga_rev(void)
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{
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unsigned int reg;
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reg = ioread32(sbc610_regs);
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return (reg >> 24) & 0xf;
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}
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static void gef_sbc610_show_cpuinfo(struct seq_file *m)
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{
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uint svid = mfspr(SPRN_SVR);
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seq_printf(m, "Vendor\t\t: GE Fanuc Intelligent Platforms\n");
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seq_printf(m, "Revision\t: %u%c\n", gef_sbc610_get_pcb_rev(),
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('A' + gef_sbc610_get_board_rev() - 1));
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seq_printf(m, "FPGA Revision\t: %u\n", gef_sbc610_get_fpga_rev());
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seq_printf(m, "SVR\t\t: 0x%x\n", svid);
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}
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static void __init gef_sbc610_nec_fixup(struct pci_dev *pdev)
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{
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unsigned int val;
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/* Do not do the fixup on other platforms! */
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if (!machine_is(gef_sbc610))
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return;
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printk(KERN_INFO "Running NEC uPD720101 Fixup\n");
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/* Ensure ports 1, 2, 3, 4 & 5 are enabled */
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pci_read_config_dword(pdev, 0xe0, &val);
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pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x5);
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/* System clock is 48-MHz Oscillator and EHCI Enabled. */
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pci_write_config_dword(pdev, 0xe4, 1 << 5);
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
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gef_sbc610_nec_fixup);
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/*
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* Called very early, device-tree isn't unflattened
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*
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* This function is called to determine whether the BSP is compatible with the
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* supplied device-tree, which is assumed to be the correct one for the actual
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* board. It is expected thati, in the future, a kernel may support multiple
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* boards.
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*/
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static int __init gef_sbc610_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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if (of_flat_dt_is_compatible(root, "gef,sbc610"))
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return 1;
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return 0;
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}
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static long __init mpc86xx_time_init(void)
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{
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unsigned int temp;
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/* Set the time base to zero */
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mtspr(SPRN_TBWL, 0);
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mtspr(SPRN_TBWU, 0);
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temp = mfspr(SPRN_HID0);
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temp |= HID0_TBEN;
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mtspr(SPRN_HID0, temp);
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asm volatile("isync");
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return 0;
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}
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static __initdata struct of_device_id of_bus_ids[] = {
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{ .compatible = "simple-bus", },
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{ .compatible = "gianfar", },
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{},
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};
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static int __init declare_of_platform_devices(void)
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{
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printk(KERN_DEBUG "Probe platform devices\n");
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of_platform_bus_probe(NULL, of_bus_ids, NULL);
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return 0;
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}
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machine_device_initcall(gef_sbc610, declare_of_platform_devices);
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define_machine(gef_sbc610) {
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.name = "GE Fanuc SBC610",
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.probe = gef_sbc610_probe,
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.setup_arch = gef_sbc610_setup_arch,
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.init_IRQ = gef_sbc610_init_irq,
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.show_cpuinfo = gef_sbc610_show_cpuinfo,
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.get_irq = mpic_get_irq,
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.restart = fsl_rstcr_restart,
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.time_init = mpc86xx_time_init,
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.calibrate_decr = generic_calibrate_decr,
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.progress = udbg_progress,
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#ifdef CONFIG_PCI
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.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
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#endif
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};
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