mpc832x_rdb.c

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/*
 * arch/powerpc/platforms/83xx/mpc832x_rdb.c
 *
 * Copyright (C) Freescale Semiconductor, Inc. 2007. All rights reserved.
 *
 * Description:
 * MPC832x RDB board specific routines.
 * This file is based on mpc832x_mds.c and mpc8313_rdb.c
 * Author: Michael Barkowski <[email protected]>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/spi/spi.h>
#include <linux/spi/mmc_spi.h>
#include <linux/mmc/host.h>
#include <linux/of_platform.h>
#include <linux/fsl_devices.h>

#include <asm/time.h>
#include <asm/ipic.h>
#include <asm/udbg.h>
#include <asm/qe.h>
#include <asm/qe_ic.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>

#include "mpc83xx.h"

#undef DEBUG
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif

#ifdef CONFIG_QUICC_ENGINE
static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
                   struct spi_board_info *board_infos,
                   unsigned int num_board_infos,
                   void (*cs_control)(struct spi_device *dev,
                              bool on))
{
    struct device_node *np;
    unsigned int i = 0;

    for_each_compatible_node(np, type, compatible) {
        int ret;
        unsigned int j;
        const void *prop;
        struct resource res[2];
        struct platform_device *pdev;
        struct fsl_spi_platform_data pdata = {
            .cs_control = cs_control,
        };

        memset(res, 0, sizeof(res));

        pdata.sysclk = sysclk;

        prop = of_get_property(np, "reg", NULL);
        if (!prop)
            goto err;
        pdata.bus_num = *(u32 *)prop;

        prop = of_get_property(np, "cell-index", NULL);
        if (prop)
            i = *(u32 *)prop;

        prop = of_get_property(np, "mode", NULL);
        if (prop && !strcmp(prop, "cpu-qe"))
            pdata.flags = SPI_QE_CPU_MODE;

        for (j = 0; j < num_board_infos; j++) {
            if (board_infos[j].bus_num == pdata.bus_num)
                pdata.max_chipselect++;
        }

        if (!pdata.max_chipselect)
            continue;

        ret = of_address_to_resource(np, 0, &res[0]);
        if (ret)
            goto err;

        ret = of_irq_to_resource(np, 0, &res[1]);
        if (ret == NO_IRQ)
            goto err;

        pdev = platform_device_alloc("mpc83xx_spi", i);
        if (!pdev)
            goto err;

        ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
        if (ret)
            goto unreg;

        ret = platform_device_add_resources(pdev, res,
                            ARRAY_SIZE(res));
        if (ret)
            goto unreg;

        ret = platform_device_add(pdev);
        if (ret)
            goto unreg;

        goto next;
unreg:
        platform_device_del(pdev);
err:
        pr_err("%s: registration failed\n", np->full_name);
next:
        i++;
    }

    return i;
}

static int __init fsl_spi_init(struct spi_board_info *board_infos,
                   unsigned int num_board_infos,
                   void (*cs_control)(struct spi_device *spi,
                          bool on))
{
    u32 sysclk = -1;
    int ret;

    /* SPI controller is either clocked from QE or SoC clock */
    sysclk = get_brgfreq();
    if (sysclk == -1) {
        sysclk = fsl_get_sys_freq();
        if (sysclk == -1)
            return -ENODEV;
    }

    ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos,
                   num_board_infos, cs_control);
    if (!ret)
        of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos,
                 num_board_infos, cs_control);

    return spi_register_board_info(board_infos, num_board_infos);
}

static void mpc83xx_spi_cs_control(struct spi_device *spi, bool on)
{
    pr_debug("%s %d %d\n", __func__, spi->chip_select, on);
    par_io_data_set(3, 13, on);
}

static struct mmc_spi_platform_data mpc832x_mmc_pdata = {
    .ocr_mask = MMC_VDD_33_34,
};

static struct spi_board_info mpc832x_spi_boardinfo = {
    .bus_num = 0x4c0,
    .chip_select = 0,
    .max_speed_hz = 50000000,
    .modalias = "mmc_spi",
    .platform_data = &mpc832x_mmc_pdata,
};

static int __init mpc832x_spi_init(void)
{
    par_io_config_pin(3,  0, 3, 0, 1, 0); /* SPI1 MOSI, I/O */
    par_io_config_pin(3,  1, 3, 0, 1, 0); /* SPI1 MISO, I/O */
    par_io_config_pin(3,  2, 3, 0, 1, 0); /* SPI1 CLK,  I/O */
    par_io_config_pin(3,  3, 2, 0, 1, 0); /* SPI1 SEL,  I   */

    par_io_config_pin(3, 13, 1, 0, 0, 0); /* !SD_CS,    O */
    par_io_config_pin(3, 14, 2, 0, 0, 0); /* SD_INSERT, I */
    par_io_config_pin(3, 15, 2, 0, 0, 0); /* SD_PROTECT,I */

    /*
     * Don't bother with legacy stuff when device tree contains
     * mmc-spi-slot node.
     */
    if (of_find_compatible_node(NULL, NULL, "mmc-spi-slot"))
        return 0;
    return fsl_spi_init(&mpc832x_spi_boardinfo, 1, mpc83xx_spi_cs_control);
}
machine_device_initcall(mpc832x_rdb, mpc832x_spi_init);
#endif /* CONFIG_QUICC_ENGINE */

/* ************************************************************************
 *
 * Setup the architecture
 *
 */
static void __init mpc832x_rdb_setup_arch(void)
{
#if defined(CONFIG_QUICC_ENGINE)
    struct device_node *np;
#endif

    if (ppc_md.progress)
        ppc_md.progress("mpc832x_rdb_setup_arch()", 0);

    mpc83xx_setup_pci();

#ifdef CONFIG_QUICC_ENGINE
    qe_reset();

    if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
        par_io_init(np);
        of_node_put(np);

        for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
            par_io_of_config(np);
    }
#endif              /* CONFIG_QUICC_ENGINE */
}

machine_device_initcall(mpc832x_rdb, mpc83xx_declare_of_platform_devices);

/*
 * Called very early, MMU is off, device-tree isn't unflattened
 */
static int __init mpc832x_rdb_probe(void)
{
    unsigned long root = of_get_flat_dt_root();

    return of_flat_dt_is_compatible(root, "MPC832xRDB");
}

define_machine(mpc832x_rdb) {
    .name       = "MPC832x RDB",
    .probe      = mpc832x_rdb_probe,
    .setup_arch = mpc832x_rdb_setup_arch,
    .init_IRQ   = mpc83xx_ipic_and_qe_init_IRQ,
    .get_irq    = ipic_get_irq,
    .restart    = mpc83xx_restart,
    .time_init  = mpc83xx_time_init,
    .calibrate_decr = generic_calibrate_decr,
    .progress   = udbg_progress,
};