mirror of https://gitee.com/openkylin/linux.git
180 lines
4.2 KiB
C
180 lines
4.2 KiB
C
/*
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* arch/powerpc/platforms/83xx/mpc832x_rdb.c
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*
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* Copyright (C) Freescale Semiconductor, Inc. 2007. All rights reserved.
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*
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* Description:
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* MPC832x RDB board specific routines.
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* This file is based on mpc832x_mds.c and mpc8313_rdb.c
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* Author: Michael Barkowski <michael.barkowski@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/pci.h>
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#include <linux/spi/spi.h>
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#include <asm/of_platform.h>
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#include <asm/time.h>
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#include <asm/ipic.h>
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#include <asm/udbg.h>
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#include <asm/qe.h>
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#include <asm/qe_ic.h>
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#include <sysdev/fsl_soc.h>
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#include "mpc83xx.h"
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(fmt...) udbg_printf(fmt)
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#else
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#define DBG(fmt...)
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#endif
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static void mpc83xx_spi_activate_cs(u8 cs, u8 polarity)
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{
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pr_debug("%s %d %d\n", __func__, cs, polarity);
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par_io_data_set(3, 13, polarity);
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}
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static void mpc83xx_spi_deactivate_cs(u8 cs, u8 polarity)
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{
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pr_debug("%s %d %d\n", __func__, cs, polarity);
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par_io_data_set(3, 13, !polarity);
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}
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static struct spi_board_info mpc832x_spi_boardinfo = {
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.bus_num = 0x4c0,
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.chip_select = 0,
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.max_speed_hz = 50000000,
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/*
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* XXX: This is spidev (spi in userspace) stub, should
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* be replaced by "mmc_spi" when mmc_spi will hit mainline.
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*/
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.modalias = "spidev",
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};
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static int __init mpc832x_spi_init(void)
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{
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if (!machine_is(mpc832x_rdb))
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return 0;
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par_io_config_pin(3, 0, 3, 0, 1, 0); /* SPI1 MOSI, I/O */
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par_io_config_pin(3, 1, 3, 0, 1, 0); /* SPI1 MISO, I/O */
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par_io_config_pin(3, 2, 3, 0, 1, 0); /* SPI1 CLK, I/O */
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par_io_config_pin(3, 3, 2, 0, 1, 0); /* SPI1 SEL, I */
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par_io_config_pin(3, 13, 1, 0, 0, 0); /* !SD_CS, O */
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par_io_config_pin(3, 14, 2, 0, 0, 0); /* SD_INSERT, I */
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par_io_config_pin(3, 15, 2, 0, 0, 0); /* SD_PROTECT,I */
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return fsl_spi_init(&mpc832x_spi_boardinfo, 1,
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mpc83xx_spi_activate_cs,
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mpc83xx_spi_deactivate_cs);
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}
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device_initcall(mpc832x_spi_init);
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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 mpc832x_rdb_setup_arch(void)
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{
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#if defined(CONFIG_PCI) || defined(CONFIG_QUICC_ENGINE)
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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("mpc832x_rdb_setup_arch()", 0);
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#ifdef CONFIG_PCI
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for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
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mpc83xx_add_bridge(np);
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#endif
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#ifdef CONFIG_QUICC_ENGINE
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qe_reset();
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if ((np = of_find_node_by_name(np, "par_io")) != NULL) {
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par_io_init(np);
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of_node_put(np);
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for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
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par_io_of_config(np);
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}
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#endif /* CONFIG_QUICC_ENGINE */
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}
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static struct of_device_id mpc832x_ids[] = {
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{ .type = "soc", },
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{ .compatible = "soc", },
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{ .type = "qe", },
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{},
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};
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static int __init mpc832x_declare_of_platform_devices(void)
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{
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if (!machine_is(mpc832x_rdb))
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return 0;
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/* Publish the QE devices */
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of_platform_bus_probe(NULL, mpc832x_ids, NULL);
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return 0;
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}
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device_initcall(mpc832x_declare_of_platform_devices);
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void __init mpc832x_rdb_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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of_node_put(np);
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#ifdef CONFIG_QUICC_ENGINE
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np = of_find_node_by_type(NULL, "qeic");
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if (!np)
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return;
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qe_ic_init(np, 0, qe_ic_cascade_low_ipic, qe_ic_cascade_high_ipic);
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of_node_put(np);
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#endif /* CONFIG_QUICC_ENGINE */
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}
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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 mpc832x_rdb_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, "MPC832xRDB");
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}
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define_machine(mpc832x_rdb) {
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.name = "MPC832x RDB",
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.probe = mpc832x_rdb_probe,
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.setup_arch = mpc832x_rdb_setup_arch,
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.init_IRQ = mpc832x_rdb_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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