forked from Minki/linux
aea12b7548
Fix broken node manipulating code, and clarify inaccurate comment. Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
199 lines
4.5 KiB
C
199 lines
4.5 KiB
C
/*
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* arch/powerpc/platforms/83xx/mpc834x_mds.c
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*
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* MPC834x MDS board specific routines
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*
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* Maintainer: Kumar Gala <galak@kernel.crashing.org>
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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/init.h>
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#include <linux/errno.h>
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#include <linux/reboot.h>
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#include <linux/pci.h>
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#include <linux/kdev_t.h>
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#include <linux/major.h>
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#include <linux/console.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/atomic.h>
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#include <asm/time.h>
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#include <asm/io.h>
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#include <asm/machdep.h>
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#include <asm/ipic.h>
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#include <asm/bootinfo.h>
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#include <asm/irq.h>
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#include <asm/prom.h>
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#include <asm/udbg.h>
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#include <sysdev/fsl_soc.h>
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#include "mpc83xx.h"
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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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#define BCSR5_INT_USB 0x02
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/* Note: This is only for PB, not for PB+PIB
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* On PB only port0 is connected using ULPI */
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static int mpc834x_usb_cfg(void)
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{
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unsigned long sccr, sicrl;
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void __iomem *immap;
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void __iomem *bcsr_regs = NULL;
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u8 bcsr5;
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struct device_node *np = NULL;
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int port0_is_dr = 0;
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if ((np = of_find_compatible_node(NULL, "usb", "fsl-usb2-dr")) != NULL)
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port0_is_dr = 1;
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if ((np = of_find_compatible_node(NULL, "usb", "fsl-usb2-mph")) != NULL){
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if (port0_is_dr) {
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printk(KERN_WARNING
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"There is only one USB port on PB board! \n");
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return -1;
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} else if (!port0_is_dr)
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/* No usb port enabled */
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return -1;
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}
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immap = ioremap(get_immrbase(), 0x1000);
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if (!immap)
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return -1;
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/* Configure clock */
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sccr = in_be32(immap + MPC83XX_SCCR_OFFS);
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if (port0_is_dr)
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sccr |= MPC83XX_SCCR_USB_DRCM_11; /* 1:3 */
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else
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sccr |= MPC83XX_SCCR_USB_MPHCM_11; /* 1:3 */
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out_be32(immap + MPC83XX_SCCR_OFFS, sccr);
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/* Configure Pin */
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sicrl = in_be32(immap + MPC83XX_SICRL_OFFS);
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/* set port0 only */
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if (port0_is_dr)
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sicrl |= MPC83XX_SICRL_USB0;
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else
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sicrl &= ~(MPC83XX_SICRL_USB0);
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out_be32(immap + MPC83XX_SICRL_OFFS, sicrl);
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iounmap(immap);
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/* Map BCSR area */
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np = of_find_node_by_name(NULL, "bcsr");
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if (np != 0) {
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struct resource res;
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of_address_to_resource(np, 0, &res);
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bcsr_regs = ioremap(res.start, res.end - res.start + 1);
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of_node_put(np);
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}
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if (!bcsr_regs)
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return -1;
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/*
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* if Processor Board is plugged into PIB board,
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* force to use the PHY on Processor Board
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*/
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bcsr5 = in_8(bcsr_regs + 5);
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if (!(bcsr5 & BCSR5_INT_USB))
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out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
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iounmap(bcsr_regs);
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return 0;
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}
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/* ************************************************************************
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*
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* Setup the architecture
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*
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*/
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static void __init mpc834x_mds_setup_arch(void)
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{
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struct device_node *np;
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if (ppc_md.progress)
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ppc_md.progress("mpc834x_mds_setup_arch()", 0);
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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 = mpc83xx_exclude_device;
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#endif
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mpc834x_usb_cfg();
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}
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static void __init mpc834x_mds_init_IRQ(void)
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{
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struct device_node *np;
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np = of_find_node_by_type(NULL, "ipic");
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if (!np)
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return;
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ipic_init(np, 0);
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/* Initialize the default interrupt mapping priorities,
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* in case the boot rom changed something on us.
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*/
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ipic_set_default_priority();
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}
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#if defined(CONFIG_I2C_MPC) && defined(CONFIG_SENSORS_DS1374)
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extern ulong ds1374_get_rtc_time(void);
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extern int ds1374_set_rtc_time(ulong);
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static int __init mpc834x_rtc_hookup(void)
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{
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struct timespec tv;
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if (!machine_is(mpc834x_mds))
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return 0;
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ppc_md.get_rtc_time = ds1374_get_rtc_time;
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ppc_md.set_rtc_time = ds1374_set_rtc_time;
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tv.tv_nsec = 0;
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tv.tv_sec = (ppc_md.get_rtc_time) ();
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do_settimeofday(&tv);
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return 0;
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}
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late_initcall(mpc834x_rtc_hookup);
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#endif
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/*
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* Called very early, MMU is off, device-tree isn't unflattened
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*/
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static int __init mpc834x_mds_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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return of_flat_dt_is_compatible(root, "MPC834xMDS");
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}
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define_machine(mpc834x_mds) {
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.name = "MPC834x MDS",
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.probe = mpc834x_mds_probe,
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.setup_arch = mpc834x_mds_setup_arch,
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.init_IRQ = mpc834x_mds_init_IRQ,
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.get_irq = ipic_get_irq,
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.restart = mpc83xx_restart,
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.time_init = mpc83xx_time_init,
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.calibrate_decr = generic_calibrate_decr,
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.progress = udbg_progress,
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};
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