240 lines
5.4 KiB
C
240 lines
5.4 KiB
C
/*
|
|
* GE SBC310 board support
|
|
*
|
|
* Author: Martyn Welch <martyn.welch@ge.com>
|
|
*
|
|
* Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* Based on: mpc86xx_hpcn.c (MPC86xx HPCN board specific routines)
|
|
* Copyright 2006 Freescale Semiconductor Inc.
|
|
*
|
|
* NEC fixup adapted from arch/mips/pci/fixup-lm2e.c
|
|
*/
|
|
|
|
#include <linux/stddef.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/kdev_t.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/of_platform.h>
|
|
|
|
#include <asm/system.h>
|
|
#include <asm/time.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/pci-bridge.h>
|
|
#include <asm/prom.h>
|
|
#include <mm/mmu_decl.h>
|
|
#include <asm/udbg.h>
|
|
|
|
#include <asm/mpic.h>
|
|
#include <asm/nvram.h>
|
|
|
|
#include <sysdev/fsl_pci.h>
|
|
#include <sysdev/fsl_soc.h>
|
|
|
|
#include "mpc86xx.h"
|
|
#include "gef_pic.h"
|
|
|
|
#undef DEBUG
|
|
|
|
#ifdef DEBUG
|
|
#define DBG (fmt...) do { printk(KERN_ERR "SBC310: " fmt); } while (0)
|
|
#else
|
|
#define DBG (fmt...) do { } while (0)
|
|
#endif
|
|
|
|
void __iomem *sbc310_regs;
|
|
|
|
static void __init gef_sbc310_init_irq(void)
|
|
{
|
|
struct device_node *cascade_node = NULL;
|
|
|
|
mpc86xx_init_irq();
|
|
|
|
/*
|
|
* There is a simple interrupt handler in the main FPGA, this needs
|
|
* to be cascaded into the MPIC
|
|
*/
|
|
cascade_node = of_find_compatible_node(NULL, NULL, "gef,fpga-pic");
|
|
if (!cascade_node) {
|
|
printk(KERN_WARNING "SBC310: No FPGA PIC\n");
|
|
return;
|
|
}
|
|
|
|
gef_pic_init(cascade_node);
|
|
of_node_put(cascade_node);
|
|
}
|
|
|
|
static void __init gef_sbc310_setup_arch(void)
|
|
{
|
|
struct device_node *regs;
|
|
#ifdef CONFIG_PCI
|
|
struct device_node *np;
|
|
|
|
for_each_compatible_node(np, "pci", "fsl,mpc8641-pcie") {
|
|
fsl_add_bridge(np, 1);
|
|
}
|
|
#endif
|
|
|
|
printk(KERN_INFO "GE Intelligent Platforms SBC310 6U VPX SBC\n");
|
|
|
|
#ifdef CONFIG_SMP
|
|
mpc86xx_smp_init();
|
|
#endif
|
|
|
|
/* Remap basic board registers */
|
|
regs = of_find_compatible_node(NULL, NULL, "gef,fpga-regs");
|
|
if (regs) {
|
|
sbc310_regs = of_iomap(regs, 0);
|
|
if (sbc310_regs == NULL)
|
|
printk(KERN_WARNING "Unable to map board registers\n");
|
|
of_node_put(regs);
|
|
}
|
|
|
|
#if defined(CONFIG_MMIO_NVRAM)
|
|
mmio_nvram_init();
|
|
#endif
|
|
}
|
|
|
|
/* Return the PCB revision */
|
|
static unsigned int gef_sbc310_get_board_id(void)
|
|
{
|
|
unsigned int reg;
|
|
|
|
reg = ioread32(sbc310_regs);
|
|
return reg & 0xff;
|
|
}
|
|
|
|
/* Return the PCB revision */
|
|
static unsigned int gef_sbc310_get_pcb_rev(void)
|
|
{
|
|
unsigned int reg;
|
|
|
|
reg = ioread32(sbc310_regs);
|
|
return (reg >> 8) & 0xff;
|
|
}
|
|
|
|
/* Return the board (software) revision */
|
|
static unsigned int gef_sbc310_get_board_rev(void)
|
|
{
|
|
unsigned int reg;
|
|
|
|
reg = ioread32(sbc310_regs);
|
|
return (reg >> 16) & 0xff;
|
|
}
|
|
|
|
/* Return the FPGA revision */
|
|
static unsigned int gef_sbc310_get_fpga_rev(void)
|
|
{
|
|
unsigned int reg;
|
|
|
|
reg = ioread32(sbc310_regs);
|
|
return (reg >> 24) & 0xf;
|
|
}
|
|
|
|
static void gef_sbc310_show_cpuinfo(struct seq_file *m)
|
|
{
|
|
uint svid = mfspr(SPRN_SVR);
|
|
|
|
seq_printf(m, "Vendor\t\t: GE Intelligent Platforms\n");
|
|
|
|
seq_printf(m, "Board ID\t: 0x%2.2x\n", gef_sbc310_get_board_id());
|
|
seq_printf(m, "Revision\t: %u%c\n", gef_sbc310_get_pcb_rev(),
|
|
('A' + gef_sbc310_get_board_rev() - 1));
|
|
seq_printf(m, "FPGA Revision\t: %u\n", gef_sbc310_get_fpga_rev());
|
|
|
|
seq_printf(m, "SVR\t\t: 0x%x\n", svid);
|
|
|
|
}
|
|
|
|
static void __init gef_sbc310_nec_fixup(struct pci_dev *pdev)
|
|
{
|
|
unsigned int val;
|
|
|
|
/* Do not do the fixup on other platforms! */
|
|
if (!machine_is(gef_sbc310))
|
|
return;
|
|
|
|
printk(KERN_INFO "Running NEC uPD720101 Fixup\n");
|
|
|
|
/* Ensure only ports 1 & 2 are enabled */
|
|
pci_read_config_dword(pdev, 0xe0, &val);
|
|
pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x2);
|
|
|
|
/* System clock is 48-MHz Oscillator and EHCI Enabled. */
|
|
pci_write_config_dword(pdev, 0xe4, 1 << 5);
|
|
}
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
|
|
gef_sbc310_nec_fixup);
|
|
|
|
/*
|
|
* Called very early, device-tree isn't unflattened
|
|
*
|
|
* This function is called to determine whether the BSP is compatible with the
|
|
* supplied device-tree, which is assumed to be the correct one for the actual
|
|
* board. It is expected thati, in the future, a kernel may support multiple
|
|
* boards.
|
|
*/
|
|
static int __init gef_sbc310_probe(void)
|
|
{
|
|
unsigned long root = of_get_flat_dt_root();
|
|
|
|
if (of_flat_dt_is_compatible(root, "gef,sbc310"))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static long __init mpc86xx_time_init(void)
|
|
{
|
|
unsigned int temp;
|
|
|
|
/* Set the time base to zero */
|
|
mtspr(SPRN_TBWL, 0);
|
|
mtspr(SPRN_TBWU, 0);
|
|
|
|
temp = mfspr(SPRN_HID0);
|
|
temp |= HID0_TBEN;
|
|
mtspr(SPRN_HID0, temp);
|
|
asm volatile("isync");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __initdata struct of_device_id of_bus_ids[] = {
|
|
{ .compatible = "simple-bus", },
|
|
{ .compatible = "gianfar", },
|
|
{},
|
|
};
|
|
|
|
static int __init declare_of_platform_devices(void)
|
|
{
|
|
printk(KERN_DEBUG "Probe platform devices\n");
|
|
of_platform_bus_probe(NULL, of_bus_ids, NULL);
|
|
|
|
return 0;
|
|
}
|
|
machine_device_initcall(gef_sbc310, declare_of_platform_devices);
|
|
|
|
define_machine(gef_sbc310) {
|
|
.name = "GE SBC310",
|
|
.probe = gef_sbc310_probe,
|
|
.setup_arch = gef_sbc310_setup_arch,
|
|
.init_IRQ = gef_sbc310_init_irq,
|
|
.show_cpuinfo = gef_sbc310_show_cpuinfo,
|
|
.get_irq = mpic_get_irq,
|
|
.restart = fsl_rstcr_restart,
|
|
.time_init = mpc86xx_time_init,
|
|
.calibrate_decr = generic_calibrate_decr,
|
|
.progress = udbg_progress,
|
|
#ifdef CONFIG_PCI
|
|
.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
|
|
#endif
|
|
};
|