mpc86xads_setup.c

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/*arch/powerpc/platforms/8xx/mpc86xads_setup.c
 *
 * Platform setup for the Freescale mpc86xads board
 *
 * Vitaly Bordug <[email protected]>
 *
 * Copyright 2005 MontaVista Software Inc.
 *
 * Heavily modified by Scott Wood <[email protected]>
 * Copyright 2007 Freescale Semiconductor, Inc.
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2. This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 */

#include <linux/init.h>
#include <linux/of_platform.h>

#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/time.h>
#include <asm/8xx_immap.h>
#include <asm/cpm1.h>
#include <asm/fs_pd.h>
#include <asm/udbg.h>

#include "mpc86xads.h"
#include "mpc8xx.h"

struct cpm_pin {
    int port, pin, flags;
};

static struct cpm_pin mpc866ads_pins[] = {
    /* SMC1 */
    {CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */
    {CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */

    /* SMC2 */
    {CPM_PORTB, 21, CPM_PIN_INPUT}, /* RX */
    {CPM_PORTB, 20, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */

    /* SCC1 */
    {CPM_PORTA, 6, CPM_PIN_INPUT}, /* CLK1 */
    {CPM_PORTA, 7, CPM_PIN_INPUT}, /* CLK2 */
    {CPM_PORTA, 14, CPM_PIN_INPUT}, /* TX */
    {CPM_PORTA, 15, CPM_PIN_INPUT}, /* RX */
    {CPM_PORTB, 19, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TENA */
    {CPM_PORTC, 10, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* RENA */
    {CPM_PORTC, 11, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CLSN */

    /* MII */
    {CPM_PORTD, 3, CPM_PIN_OUTPUT},
    {CPM_PORTD, 4, CPM_PIN_OUTPUT},
    {CPM_PORTD, 5, CPM_PIN_OUTPUT},
    {CPM_PORTD, 6, CPM_PIN_OUTPUT},
    {CPM_PORTD, 7, CPM_PIN_OUTPUT},
    {CPM_PORTD, 8, CPM_PIN_OUTPUT},
    {CPM_PORTD, 9, CPM_PIN_OUTPUT},
    {CPM_PORTD, 10, CPM_PIN_OUTPUT},
    {CPM_PORTD, 11, CPM_PIN_OUTPUT},
    {CPM_PORTD, 12, CPM_PIN_OUTPUT},
    {CPM_PORTD, 13, CPM_PIN_OUTPUT},
    {CPM_PORTD, 14, CPM_PIN_OUTPUT},
    {CPM_PORTD, 15, CPM_PIN_OUTPUT},

    /* I2C */
    {CPM_PORTB, 26, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
    {CPM_PORTB, 27, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
};

static void __init init_ioports(void)
{
    int i;

    for (i = 0; i < ARRAY_SIZE(mpc866ads_pins); i++) {
        struct cpm_pin *pin = &mpc866ads_pins[i];
        cpm1_set_pin(pin->port, pin->pin, pin->flags);
    }

    cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
    cpm1_clk_setup(CPM_CLK_SMC2, CPM_BRG2, CPM_CLK_RTX);
    cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK1, CPM_CLK_TX);
    cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_RX);

    /* Set FEC1 and FEC2 to MII mode */
    clrbits32(&mpc8xx_immr->im_cpm.cp_cptr, 0x00000180);
}

static void __init mpc86xads_setup_arch(void)
{
    struct device_node *np;
    u32 __iomem *bcsr_io;

    cpm_reset();
    init_ioports();

    np = of_find_compatible_node(NULL, NULL, "fsl,mpc866ads-bcsr");
    if (!np) {
        printk(KERN_CRIT "Could not find fsl,mpc866ads-bcsr node\n");
        return;
    }

    bcsr_io = of_iomap(np, 0);
    of_node_put(np);

    if (bcsr_io == NULL) {
        printk(KERN_CRIT "Could not remap BCSR\n");
        return;
    }

    clrbits32(bcsr_io, BCSR1_RS232EN_1 | BCSR1_RS232EN_2 | BCSR1_ETHEN);
    iounmap(bcsr_io);
}

static int __init mpc86xads_probe(void)
{
    unsigned long root = of_get_flat_dt_root();
    return of_flat_dt_is_compatible(root, "fsl,mpc866ads");
}

static struct of_device_id __initdata of_bus_ids[] = {
    { .name = "soc", },
    { .name = "cpm", },
    { .name = "localbus", },
    {},
};

static int __init declare_of_platform_devices(void)
{
    of_platform_bus_probe(NULL, of_bus_ids, NULL);

    return 0;
}
machine_device_initcall(mpc86x_ads, declare_of_platform_devices);

define_machine(mpc86x_ads) {
    .name           = "MPC86x ADS",
    .probe          = mpc86xads_probe,
    .setup_arch     = mpc86xads_setup_arch,
    .init_IRQ       = mpc8xx_pics_init,
    .get_irq        = mpc8xx_get_irq,
    .restart        = mpc8xx_restart,
    .calibrate_decr     = mpc8xx_calibrate_decr,
    .set_rtc_time       = mpc8xx_set_rtc_time,
    .get_rtc_time       = mpc8xx_get_rtc_time,
    .progress       = udbg_progress,
};