492bf4f25a
The fixups are executed once the pci-device is found which is during boot process so __init seems fine as long as the platform does not support hotplug. However it is possible to remove the PCI bus at run time and have it rediscovered again via "echo 1 > /sys/bus/pci/rescan" and this will call the fixups again. Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
155 lines
3.5 KiB
C
155 lines
3.5 KiB
C
/*
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* Based on MPC8560 ADS and arch/ppc tqm85xx ports
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*
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* Maintained by Kumar Gala (see MAINTAINERS for contact information)
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*
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* Copyright 2008 Freescale Semiconductor Inc.
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*
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* Copyright (c) 2005-2006 DENX Software Engineering
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* Stefan Roese <sr@denx.de>
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*
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* Based on original work by
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* Kumar Gala <kumar.gala@freescale.com>
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* Copyright 2004 Freescale Semiconductor 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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#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/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/mpic.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 <sysdev/fsl_soc.h>
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#include <sysdev/fsl_pci.h>
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#include "mpc85xx.h"
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#ifdef CONFIG_CPM2
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#include <asm/cpm2.h>
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#endif /* CONFIG_CPM2 */
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static void __init tqm85xx_pic_init(void)
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{
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struct mpic *mpic = mpic_alloc(NULL, 0,
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MPIC_BIG_ENDIAN,
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0, 256, " OpenPIC ");
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BUG_ON(mpic == NULL);
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mpic_init(mpic);
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mpc85xx_cpm2_pic_init();
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}
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/*
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* Setup the architecture
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*/
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static void __init tqm85xx_setup_arch(void)
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{
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#ifdef CONFIG_PCI
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struct device_node *np;
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#endif
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if (ppc_md.progress)
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ppc_md.progress("tqm85xx_setup_arch()", 0);
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#ifdef CONFIG_CPM2
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cpm2_reset();
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#endif
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#ifdef CONFIG_PCI
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for_each_node_by_type(np, "pci") {
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if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
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of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
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struct resource rsrc;
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if (!of_address_to_resource(np, 0, &rsrc)) {
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if ((rsrc.start & 0xfffff) == 0x8000)
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fsl_add_bridge(np, 1);
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else
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fsl_add_bridge(np, 0);
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}
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}
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}
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#endif
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}
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static void tqm85xx_show_cpuinfo(struct seq_file *m)
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{
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uint pvid, svid, phid1;
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pvid = mfspr(SPRN_PVR);
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svid = mfspr(SPRN_SVR);
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seq_printf(m, "Vendor\t\t: TQ Components\n");
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seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
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seq_printf(m, "SVR\t\t: 0x%x\n", svid);
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/* Display cpu Pll setting */
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phid1 = mfspr(SPRN_HID1);
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seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
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}
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static void __devinit tqm85xx_ti1520_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(tqm85xx))
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return;
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dev_info(&pdev->dev, "Using TI 1520 fixup on TQM85xx\n");
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/*
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* Enable P2CCLK bit in system control register
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* to enable CLOCK output to power chip
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*/
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pci_read_config_dword(pdev, 0x80, &val);
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pci_write_config_dword(pdev, 0x80, val | (1 << 27));
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520,
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tqm85xx_ti1520_fixup);
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machine_device_initcall(tqm85xx, mpc85xx_common_publish_devices);
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static const char *board[] __initdata = {
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"tqc,tqm8540",
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"tqc,tqm8541",
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"tqc,tqm8548",
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"tqc,tqm8555",
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"tqc,tqm8560",
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NULL
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};
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/*
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* Called very early, device-tree isn't unflattened
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*/
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static int __init tqm85xx_probe(void)
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{
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return of_flat_dt_match(of_get_flat_dt_root(), board);
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}
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define_machine(tqm85xx) {
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.name = "TQM85xx",
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.probe = tqm85xx_probe,
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.setup_arch = tqm85xx_setup_arch,
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.init_IRQ = tqm85xx_pic_init,
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.show_cpuinfo = tqm85xx_show_cpuinfo,
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.get_irq = mpic_get_irq,
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.restart = fsl_rstcr_restart,
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.calibrate_decr = generic_calibrate_decr,
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.progress = udbg_progress,
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};
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