source: mainline/uspace/drv/platform/malta/malta.c

/*
 * Copyright (c) 2010 Lenka Trochtova
 * Copyright (c) 2013 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * @addtogroup malta
 * @{
 */

/** @file
 */

#include <assert.h>
#include <stdio.h>
#include <errno.h>
#include <stdbool.h>
#include <fibril_synch.h>
#include <stdlib.h>
#include <str.h>
#include <ctype.h>
#include <macros.h>

#include <ddi.h>
#include <ddf/driver.h>
#include <ddf/log.h>
#include <ipc/dev_iface.h>
#include <ops/hw_res.h>
#include <ops/pio_window.h>
#include <byteorder.h>

#define NAME "malta"

#define GT_BASE         UINT32_C(0x1be00000)
#define GT_SIZE         (2 * 1024 * 1024)

#define GT_PCI_CMD      0xc00
#define GT_PCI_CONFADDR 0xcf8
#define GT_PCI_CONFDATA 0xcfc

#define GT_PCI_CMD_MBYTESWAP    0x1

#define GT_PCI_MEMBASE  UINT32_C(0x10000000)
#define GT_PCI_MEMSIZE  UINT32_C(0x08000000)

#define GT_PCI_IOBASE   UINT32_C(0x18000000)
#define GT_PCI_IOSIZE   UINT32_C(0x00200000)

typedef struct malta_fun {
        hw_resource_list_t hw_resources;
        pio_window_t pio_window;
} malta_fun_t;

static errno_t malta_dev_add(ddf_dev_t *dev);
static void malta_init(void);

/** The root device driver's standard operations. */
static driver_ops_t malta_ops = {
        .dev_add = &malta_dev_add
};

/** The root device driver structure. */
static driver_t malta_driver = {
        .name = NAME,
        .driver_ops = &malta_ops
};

static hw_resource_t pci_conf_regs[] = {
        {
                .type = IO_RANGE,
                .res.io_range = {
                        .address = GT_BASE + GT_PCI_CONFADDR,
                        .size = 4,
                        .relative = false,
                        .endianness = LITTLE_ENDIAN
                }
        },
        {
                .type = IO_RANGE,
                .res.io_range = {
                        .address = GT_BASE + GT_PCI_CONFDATA,
                        .size = 4,
                        .relative = false,
                        .endianness = LITTLE_ENDIAN
                }
        }
};

static malta_fun_t pci_data = {
        .hw_resources = {
                sizeof(pci_conf_regs) / sizeof(pci_conf_regs[0]),
                pci_conf_regs
        },
        .pio_window = {
                .mem = {
                        .base = GT_PCI_MEMBASE,
                        .size = GT_PCI_MEMSIZE
                },
                .io = {
                        .base = GT_PCI_IOBASE,
                        .size = GT_PCI_IOSIZE
                }
        }
};

/** Obtain function soft-state from DDF function node */
static malta_fun_t *malta_fun(ddf_fun_t *fnode)
{
        return ddf_fun_data_get(fnode);
}

static hw_resource_list_t *malta_get_resources(ddf_fun_t *fnode)
{
        malta_fun_t *fun = malta_fun(fnode);

        assert(fun != NULL);
        return &fun->hw_resources;
}

static errno_t malta_enable_interrupt(ddf_fun_t *fun, int irq)
{
        /* TODO */

        return false;
}

static pio_window_t *malta_get_pio_window(ddf_fun_t *fnode)
{
        malta_fun_t *fun = malta_fun(fnode);

        assert(fun != NULL);
        return &fun->pio_window;
}

static hw_res_ops_t fun_hw_res_ops = {
        .get_resource_list = &malta_get_resources,
        .enable_interrupt = &malta_enable_interrupt,
};

static pio_window_ops_t fun_pio_window_ops = {
        .get_pio_window = &malta_get_pio_window
};

/* Initialized in malta_init() function. */
static ddf_dev_ops_t malta_fun_ops;

static bool
malta_add_fun(ddf_dev_t *dev, const char *name, const char *str_match_id,
    malta_fun_t *fun_proto)
{
        ddf_msg(LVL_DEBUG, "Adding new function '%s'.", name);

        ddf_fun_t *fnode = NULL;
        errno_t rc;

        /* Create new device. */
        fnode = ddf_fun_create(dev, fun_inner, name);
        if (fnode == NULL)
                goto failure;

        malta_fun_t *fun = ddf_fun_data_alloc(fnode, sizeof(malta_fun_t));
        *fun = *fun_proto;

        /* Add match ID */
        rc = ddf_fun_add_match_id(fnode, str_match_id, 100);
        if (rc != EOK)
                goto failure;

        /* Set provided operations to the device. */
        ddf_fun_set_ops(fnode, &malta_fun_ops);

        /* Register function. */
        if (ddf_fun_bind(fnode) != EOK) {
                ddf_msg(LVL_ERROR, "Failed binding function %s.", name);
                goto failure;
        }

        return true;

failure:
        if (fnode != NULL)
                ddf_fun_destroy(fnode);

        ddf_msg(LVL_ERROR, "Failed adding function '%s'.", name);

        return false;
}

static bool malta_add_functions(ddf_dev_t *dev)
{
        return malta_add_fun(dev, "pci0", "intel_pci", &pci_data);
}

/** Get the root device.
 *
 * @param dev           The device which is root of the whole device tree (both
 *                      of HW and pseudo devices).
 * @return              Zero on success, error number otherwise.
 */
static errno_t malta_dev_add(ddf_dev_t *dev)
{
        ioport32_t *gt;
        uint32_t val;
        errno_t ret;

        ddf_msg(LVL_DEBUG, "malta_dev_add, device handle = %d",
            (int)ddf_dev_get_handle(dev));

        /*
         * We need to disable byte swapping of the outgoing and incoming
         * PCI data, because the PCI driver assumes no byte swapping behind
         * the scenes and takes care of it itself.
         */
        ret = pio_enable((void *) GT_BASE, GT_SIZE, (void **) &gt);
        if (ret != EOK)
                return ret;
        val = uint32_t_le2host(pio_read_32(
            &gt[GT_PCI_CMD / sizeof(ioport32_t)]));
        val |= GT_PCI_CMD_MBYTESWAP;
        pio_write_32(
            &gt[GT_PCI_CMD / sizeof(ioport32_t)], host2uint32_t_le(val));

        /* Register functions. */
        if (!malta_add_functions(dev)) {
                ddf_msg(LVL_ERROR, "Failed to add functions for the Malta platform.");
        }

        return EOK;
}

static void malta_init(void)
{
        ddf_log_init(NAME);
        malta_fun_ops.interfaces[HW_RES_DEV_IFACE] = &fun_hw_res_ops;
        malta_fun_ops.interfaces[PIO_WINDOW_DEV_IFACE] = &fun_pio_window_ops;
}

int main(int argc, char *argv[])
{
        printf(NAME ": HelenOS Malta platform driver\n");
        malta_init();
        return ddf_driver_main(&malta_driver);
}

/**
 * @}
 */