mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-12 14:36:41 +07:00
f90bb153b1
This patch reworks the way IRQs are fixed up on PCI for arch powerpc. It makes pci_read_irq_line() called by default in the PCI code for devices that are probed, and add an optional per-device fixup in ppc_md for platforms that really need to correct what they obtain from pci_read_irq_line(). It also removes ppc_md.irq_bus_setup which was only used by pSeries and should not be needed anymore. I've also removed the pSeries s7a workaround as it can't work with the current interrupt code anyway. I'm trying to get one of these machines working so I can test a proper fix for that problem. I also haven't updated the old-style fixup code from 85xx_cds.c because it's actually buggy :) It assigns pci_dev->irq hard coded numbers which is no good with the new IRQ mapping code. It should at least use irq_create_mapping(NULL, hard_coded_number); and possibly also set_irq_type() to set them as level low. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
300 lines
7.0 KiB
C
300 lines
7.0 KiB
C
/*
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* MPC85xx setup and early boot code plus other random bits.
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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 2005 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/root_dev.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/mpc85xx.h>
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#include <asm/prom.h>
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#include <asm/mpic.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 "mpc85xx.h"
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#ifdef CONFIG_CPM2
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#include <linux/fs_enet_pd.h>
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#include <asm/cpm2.h>
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#include <sysdev/cpm2_pic.h>
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#include <asm/fs_pd.h>
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#endif
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#ifndef CONFIG_PCI
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unsigned long isa_io_base = 0;
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unsigned long isa_mem_base = 0;
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#endif
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#ifdef CONFIG_PCI
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int
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mpc85xx_exclude_device(u_char bus, u_char devfn)
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{
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if (bus == 0 && PCI_SLOT(devfn) == 0)
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return PCIBIOS_DEVICE_NOT_FOUND;
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else
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return PCIBIOS_SUCCESSFUL;
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}
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#endif /* CONFIG_PCI */
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#ifdef CONFIG_CPM2
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static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
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{
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int cascade_irq;
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while ((cascade_irq = cpm2_get_irq()) >= 0) {
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generic_handle_irq(cascade_irq);
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}
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desc->chip->eoi(irq);
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}
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#endif /* CONFIG_CPM2 */
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void __init mpc85xx_ads_pic_init(void)
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{
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struct mpic *mpic;
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struct resource r;
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struct device_node *np = NULL;
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#ifdef CONFIG_CPM2
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int irq;
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#endif
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np = of_find_node_by_type(np, "open-pic");
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if (np == NULL) {
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printk(KERN_ERR "Could not find open-pic node\n");
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return;
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}
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if(of_address_to_resource(np, 0, &r)) {
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printk(KERN_ERR "Could not map mpic register space\n");
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of_node_put(np);
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return;
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}
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mpic = mpic_alloc(np, r.start,
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MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
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4, 0, " OpenPIC ");
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BUG_ON(mpic == NULL);
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of_node_put(np);
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mpic_assign_isu(mpic, 0, r.start + 0x10200);
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mpic_assign_isu(mpic, 1, r.start + 0x10280);
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mpic_assign_isu(mpic, 2, r.start + 0x10300);
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mpic_assign_isu(mpic, 3, r.start + 0x10380);
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mpic_assign_isu(mpic, 4, r.start + 0x10400);
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mpic_assign_isu(mpic, 5, r.start + 0x10480);
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mpic_assign_isu(mpic, 6, r.start + 0x10500);
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mpic_assign_isu(mpic, 7, r.start + 0x10580);
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/* Unused on this platform (leave room for 8548) */
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mpic_assign_isu(mpic, 8, r.start + 0x10600);
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mpic_assign_isu(mpic, 9, r.start + 0x10680);
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mpic_assign_isu(mpic, 10, r.start + 0x10700);
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mpic_assign_isu(mpic, 11, r.start + 0x10780);
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/* External Interrupts */
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mpic_assign_isu(mpic, 12, r.start + 0x10000);
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mpic_assign_isu(mpic, 13, r.start + 0x10080);
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mpic_assign_isu(mpic, 14, r.start + 0x10100);
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mpic_init(mpic);
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#ifdef CONFIG_CPM2
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/* Setup CPM2 PIC */
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np = of_find_node_by_type(NULL, "cpm-pic");
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if (np == NULL) {
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printk(KERN_ERR "PIC init: can not find cpm-pic node\n");
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return;
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}
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irq = irq_of_parse_and_map(np, 0);
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cpm2_pic_init(np);
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set_irq_chained_handler(irq, cpm2_cascade);
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#endif
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}
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/*
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* Setup the architecture
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*/
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#ifdef CONFIG_CPM2
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void init_fcc_ioports(struct fs_platform_info *fpi)
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{
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struct io_port *io = cpm2_map(im_ioport);
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int fcc_no = fs_get_fcc_index(fpi->fs_no);
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int target;
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u32 tempval;
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switch(fcc_no) {
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case 1:
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tempval = in_be32(&io->iop_pdirb);
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tempval &= ~PB2_DIRB0;
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tempval |= PB2_DIRB1;
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out_be32(&io->iop_pdirb, tempval);
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tempval = in_be32(&io->iop_psorb);
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tempval &= ~PB2_PSORB0;
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tempval |= PB2_PSORB1;
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out_be32(&io->iop_psorb, tempval);
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tempval = in_be32(&io->iop_pparb);
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tempval |= (PB2_DIRB0 | PB2_DIRB1);
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out_be32(&io->iop_pparb, tempval);
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target = CPM_CLK_FCC2;
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break;
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case 2:
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tempval = in_be32(&io->iop_pdirb);
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tempval &= ~PB3_DIRB0;
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tempval |= PB3_DIRB1;
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out_be32(&io->iop_pdirb, tempval);
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tempval = in_be32(&io->iop_psorb);
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tempval &= ~PB3_PSORB0;
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tempval |= PB3_PSORB1;
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out_be32(&io->iop_psorb, tempval);
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tempval = in_be32(&io->iop_pparb);
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tempval |= (PB3_DIRB0 | PB3_DIRB1);
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out_be32(&io->iop_pparb, tempval);
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tempval = in_be32(&io->iop_pdirc);
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tempval |= PC3_DIRC1;
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out_be32(&io->iop_pdirc, tempval);
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tempval = in_be32(&io->iop_pparc);
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tempval |= PC3_DIRC1;
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out_be32(&io->iop_pparc, tempval);
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target = CPM_CLK_FCC3;
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break;
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default:
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printk(KERN_ERR "init_fcc_ioports: invalid FCC number\n");
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return;
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}
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/* Port C has clocks...... */
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tempval = in_be32(&io->iop_psorc);
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tempval &= ~(PC_CLK(fpi->clk_rx - 8) | PC_CLK(fpi->clk_tx - 8));
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out_be32(&io->iop_psorc, tempval);
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tempval = in_be32(&io->iop_pdirc);
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tempval &= ~(PC_CLK(fpi->clk_rx - 8) | PC_CLK(fpi->clk_tx - 8));
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out_be32(&io->iop_pdirc, tempval);
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tempval = in_be32(&io->iop_pparc);
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tempval |= (PC_CLK(fpi->clk_rx - 8) | PC_CLK(fpi->clk_tx - 8));
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out_be32(&io->iop_pparc, tempval);
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cpm2_unmap(io);
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/* Configure Serial Interface clock routing.
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* First, clear FCC bits to zero,
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* then set the ones we want.
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*/
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cpm2_clk_setup(target, fpi->clk_rx, CPM_CLK_RX);
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cpm2_clk_setup(target, fpi->clk_tx, CPM_CLK_TX);
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}
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#endif
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static void __init mpc85xx_ads_setup_arch(void)
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{
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struct device_node *cpu;
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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("mpc85xx_ads_setup_arch()", 0);
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cpu = of_find_node_by_type(NULL, "cpu");
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if (cpu != 0) {
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const unsigned int *fp;
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fp = get_property(cpu, "clock-frequency", NULL);
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if (fp != 0)
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loops_per_jiffy = *fp / HZ;
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else
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loops_per_jiffy = 50000000 / HZ;
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of_node_put(cpu);
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}
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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 (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
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add_bridge(np);
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ppc_md.pci_exclude_device = mpc85xx_exclude_device;
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#endif
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#ifdef CONFIG_ROOT_NFS
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ROOT_DEV = Root_NFS;
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#else
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ROOT_DEV = Root_HDA1;
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#endif
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}
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void mpc85xx_ads_show_cpuinfo(struct seq_file *m)
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{
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uint pvid, svid, phid1;
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uint memsize = total_memory;
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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: Freescale Semiconductor\n");
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seq_printf(m, "Machine\t\t: mpc85xx\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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/* Display the amount of memory */
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seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
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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 mpc85xx_ads_probe(void)
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{
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/* We always match for now, eventually we should look at the flat
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dev tree to ensure this is the board we are suppose to run on
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*/
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return 1;
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}
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define_machine(mpc85xx_ads) {
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.name = "MPC85xx ADS",
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.probe = mpc85xx_ads_probe,
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.setup_arch = mpc85xx_ads_setup_arch,
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.init_IRQ = mpc85xx_ads_pic_init,
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.show_cpuinfo = mpc85xx_ads_show_cpuinfo,
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.get_irq = mpic_get_irq,
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.restart = mpc85xx_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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