forked from Minki/linux
8b5690f884
Since commit [e58aa3d2: genirq: Run irq handlers with interrupts disabled], We run all interrupt handlers with interrupts disabled and we even check and yell when an interrupt handler returns with interrupts enabled (see commit [b738a50a: genirq: Warn when handler enables interrupts]). So now this flag is a NOOP and can be removed. [ralf@linux-mips.org: Fixed up conflicts in arch/mips/alchemy/common/dbdma.c, arch/mips/cavium-octeon/smp.c and arch/mips/kernel/perf_event.c.] Signed-off-by: Yong Zhang <yong.zhang0@gmail.com> To: linux-kernel@vger.kernel.org Cc: tglx@linutronix.de linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2835/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/*
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* Based on linux/arch/mips/txx9/rbtx4938/setup.c,
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* and RBTX49xx patch from CELF patch archive.
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*
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* Copyright 2001, 2003-2005 MontaVista Software Inc.
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* Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
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* (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <asm/txx9/generic.h>
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#include <asm/txx9/tx4927.h>
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int __init tx4927_report_pciclk(void)
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{
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int pciclk = 0;
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printk(KERN_INFO "PCIC --%s PCICLK:",
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(__raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_PCI66) ?
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" PCI66" : "");
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if (__raw_readq(&tx4927_ccfgptr->pcfg) & TX4927_PCFG_PCICLKEN_ALL) {
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u64 ccfg = __raw_readq(&tx4927_ccfgptr->ccfg);
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switch ((unsigned long)ccfg &
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TX4927_CCFG_PCIDIVMODE_MASK) {
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case TX4927_CCFG_PCIDIVMODE_2_5:
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pciclk = txx9_cpu_clock * 2 / 5; break;
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case TX4927_CCFG_PCIDIVMODE_3:
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pciclk = txx9_cpu_clock / 3; break;
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case TX4927_CCFG_PCIDIVMODE_5:
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pciclk = txx9_cpu_clock / 5; break;
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case TX4927_CCFG_PCIDIVMODE_6:
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pciclk = txx9_cpu_clock / 6; break;
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}
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printk("Internal(%u.%uMHz)",
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(pciclk + 50000) / 1000000,
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((pciclk + 50000) / 100000) % 10);
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} else {
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printk("External");
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pciclk = -1;
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}
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printk("\n");
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return pciclk;
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}
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int __init tx4927_pciclk66_setup(void)
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{
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int pciclk;
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/* Assert M66EN */
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tx4927_ccfg_set(TX4927_CCFG_PCI66);
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/* Double PCICLK (if possible) */
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if (__raw_readq(&tx4927_ccfgptr->pcfg) & TX4927_PCFG_PCICLKEN_ALL) {
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unsigned int pcidivmode = 0;
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u64 ccfg = __raw_readq(&tx4927_ccfgptr->ccfg);
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pcidivmode = (unsigned long)ccfg &
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TX4927_CCFG_PCIDIVMODE_MASK;
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switch (pcidivmode) {
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case TX4927_CCFG_PCIDIVMODE_5:
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case TX4927_CCFG_PCIDIVMODE_2_5:
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pcidivmode = TX4927_CCFG_PCIDIVMODE_2_5;
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pciclk = txx9_cpu_clock * 2 / 5;
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break;
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case TX4927_CCFG_PCIDIVMODE_6:
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case TX4927_CCFG_PCIDIVMODE_3:
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default:
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pcidivmode = TX4927_CCFG_PCIDIVMODE_3;
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pciclk = txx9_cpu_clock / 3;
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}
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tx4927_ccfg_change(TX4927_CCFG_PCIDIVMODE_MASK,
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pcidivmode);
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printk(KERN_DEBUG "PCICLK: ccfg:%08lx\n",
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(unsigned long)__raw_readq(&tx4927_ccfgptr->ccfg));
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} else
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pciclk = -1;
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return pciclk;
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}
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void __init tx4927_setup_pcierr_irq(void)
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{
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if (request_irq(TXX9_IRQ_BASE + TX4927_IR_PCIERR,
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tx4927_pcierr_interrupt,
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0, "PCI error",
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(void *)TX4927_PCIC_REG))
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printk(KERN_WARNING "Failed to request irq for PCIERR\n");
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}
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