130 lines
3.0 KiB
C
130 lines
3.0 KiB
C
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/*
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* Keymile mgcoge support
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* Copyright 2008 DENX Software Engineering GmbH
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* Author: Heiko Schocher <hs@denx.de>
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*
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* based on code from:
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* Copyright 2007 Freescale Semiconductor, Inc.
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* Author: Scott Wood <scottwood@freescale.com>
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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/init.h>
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#include <linux/interrupt.h>
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#include <linux/fsl_devices.h>
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#include <linux/of_platform.h>
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#include <asm/io.h>
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#include <asm/cpm2.h>
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#include <asm/udbg.h>
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#include <asm/machdep.h>
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#include <asm/time.h>
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#include <asm/mpc8260.h>
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#include <asm/prom.h>
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#include <sysdev/fsl_soc.h>
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#include <sysdev/cpm2_pic.h>
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#include "pq2.h"
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static void __init mgcoge_pic_init(void)
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{
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struct device_node *np = of_find_compatible_node(NULL, NULL, "fsl,pq2-pic");
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if (!np) {
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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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cpm2_pic_init(np);
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of_node_put(np);
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}
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struct cpm_pin {
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int port, pin, flags;
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};
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static __initdata struct cpm_pin mgcoge_pins[] = {
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/* SMC2 */
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{1, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
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{1, 9, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
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/* SCC4 */
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{3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
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{3, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
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{3, 9, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
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{3, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
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{4, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
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{4, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
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};
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static void __init init_ioports(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(mgcoge_pins); i++) {
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const struct cpm_pin *pin = &mgcoge_pins[i];
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cpm2_set_pin(pin->port - 1, pin->pin, pin->flags);
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}
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cpm2_smc_clk_setup(CPM_CLK_SMC2, CPM_BRG8);
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cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK7, CPM_CLK_RX);
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cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK8, CPM_CLK_TX);
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}
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static void __init mgcoge_setup_arch(void)
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{
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if (ppc_md.progress)
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ppc_md.progress("mgcoge_setup_arch()", 0);
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cpm2_reset();
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/* When this is set, snooping CPM DMA from RAM causes
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* machine checks. See erratum SIU18.
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*/
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clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP);
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init_ioports();
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if (ppc_md.progress)
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ppc_md.progress("mgcoge_setup_arch(), finish", 0);
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}
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static __initdata struct of_device_id of_bus_ids[] = {
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{ .compatible = "simple-bus", },
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{},
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};
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static int __init declare_of_platform_devices(void)
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{
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of_platform_bus_probe(NULL, of_bus_ids, NULL);
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return 0;
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}
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machine_device_initcall(mgcoge, declare_of_platform_devices);
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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 mgcoge_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, "keymile,mgcoge");
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}
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define_machine(mgcoge)
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{
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.name = "Keymile MGCOGE",
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.probe = mgcoge_probe,
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.setup_arch = mgcoge_setup_arch,
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.init_IRQ = mgcoge_pic_init,
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.get_irq = cpm2_get_irq,
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.calibrate_decr = generic_calibrate_decr,
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.restart = pq2_restart,
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.progress = udbg_progress,
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};
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