HelenOS sources

root/uspace/drv/audio/sb16/main.c

DEFINITIONS

1. main
2. irq_handler
3. sb_add_device
4. sb_get_res
5. sb_enable_interrupt

/*
 * Copyright (c) 2011 Jan Vesely
 * Copyright (c) 2011 Vojtech Horky
 * 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 drvaudiosb16
 * @{
 */
/** @file
 * Main routines of Creative Labs SoundBlaster 16 driver
 */
#include <ddf/driver.h>
#include <ddf/interrupt.h>
#include <ddf/log.h>
#include <device/hw_res_parsed.h>
#include <assert.h>
#include <stdio.h>
#include <errno.h>
#include <str_error.h>

#include "ddf_log.h"
#include "sb16.h"

#define NAME "sb16"

static errno_t sb_add_device(ddf_dev_t *device);
static errno_t sb_get_res(ddf_dev_t *device, addr_range_t **pp_sb_regs,
    addr_range_t **pp_mpu_regs, int *irq, int *dma8, int *dma16);
static errno_t sb_enable_interrupt(ddf_dev_t *device, int irq);

static driver_ops_t sb_driver_ops = {
        .dev_add = sb_add_device,
};

static driver_t sb_driver = {
        .name = NAME,
        .driver_ops = &sb_driver_ops
};

/** Initialize global driver structures (NONE).
 *
 * @param[in] argc Nmber of arguments in argv vector (ignored).
 * @param[in] argv Cmdline argument vector (ignored).
 * @return Error code.
 *
 * Driver debug level is set here.
 */
int main(int argc, char *argv[])
{
        printf(NAME ": HelenOS SB16 audio driver.\n");
        ddf_log_init(NAME);
        return ddf_driver_main(&sb_driver);
}

/** SB16 IRQ handler.
 *
 * @param call IRQ event notification
 * @param arg Argument (sb16_t *)
 */
static void irq_handler(ipc_call_t *call, void *arg)
{
        sb16_t *sb16_dev = (sb16_t *)arg;
        sb16_interrupt(sb16_dev);
}

/** Initialize new SB16 driver instance.
 *
 * @param[in] device DDF instance of the device to initialize.
 * @return Error code.
 */
static errno_t sb_add_device(ddf_dev_t *device)
{
        bool handler_regd = false;
        const size_t irq_cmd_count = sb16_irq_code_size();
        irq_cmd_t irq_cmds[irq_cmd_count];
        irq_pio_range_t irq_ranges[1];
        cap_irq_handle_t irq_cap;

        sb16_t *soft_state = ddf_dev_data_alloc(device, sizeof(sb16_t));
        errno_t rc = soft_state ? EOK : ENOMEM;
        if (rc != EOK) {
                ddf_log_error("Failed to allocate sb16 structure.");
                goto error;
        }

        addr_range_t sb_regs;
        addr_range_t *p_sb_regs = &sb_regs;
        addr_range_t mpu_regs;
        addr_range_t *p_mpu_regs = &mpu_regs;
        int irq = 0, dma8 = 0, dma16 = 0;

        rc = sb_get_res(device, &p_sb_regs, &p_mpu_regs, &irq, &dma8, &dma16);
        if (rc != EOK) {
                ddf_log_error("Failed to get resources: %s.", str_error(rc));
                goto error;
        }

        sb16_irq_code(p_sb_regs, dma8, dma16, irq_cmds, irq_ranges);

        irq_code_t irq_code = {
                .cmdcount = irq_cmd_count,
                .cmds = irq_cmds,
                .rangecount = 1,
                .ranges = irq_ranges
        };

        rc = register_interrupt_handler(device, irq, irq_handler,
            (void *)soft_state, &irq_code, &irq_cap);
        if (rc != EOK) {
                ddf_log_error("Failed to register irq handler: %s.",
                    str_error(rc));
                goto error;
        }

        handler_regd = true;

        rc = sb_enable_interrupt(device, irq);
        if (rc != EOK) {
                ddf_log_error("Failed to enable interrupts: %s.",
                    str_error(rc));
                goto error;
        }

        rc = sb16_init_sb16(soft_state, p_sb_regs, device, dma8, dma16);
        if (rc != EOK) {
                ddf_log_error("Failed to init sb16 driver: %s.",
                    str_error(rc));
                goto error;
        }

        rc = sb16_init_mpu(soft_state, p_mpu_regs);
        if (rc == EOK) {
                ddf_fun_t *mpu_fun =
                    ddf_fun_create(device, fun_exposed, "midi");
                if (mpu_fun) {
                        rc = ddf_fun_bind(mpu_fun);
                        if (rc != EOK)
                                ddf_log_error(
                                    "Failed to bind midi function: %s.",
                                    str_error(rc));
                } else {
                        ddf_log_error("Failed to create midi function.");
                }
        } else {
                ddf_log_warning("Failed to init mpu driver: %s.",
                    str_error(rc));
        }

        /* MPU state does not matter */
        return EOK;
error:
        if (handler_regd)
                unregister_interrupt_handler(device, irq_cap);
        return rc;
}

static errno_t sb_get_res(ddf_dev_t *device, addr_range_t **pp_sb_regs,
    addr_range_t **pp_mpu_regs, int *irq, int *dma8, int *dma16)
{
        assert(device);

        async_sess_t *parent_sess = ddf_dev_parent_sess_get(device);
        if (parent_sess == NULL)
                return ENOMEM;

        hw_res_list_parsed_t hw_res;
        hw_res_list_parsed_init(&hw_res);
        const errno_t ret = hw_res_get_list_parsed(parent_sess, &hw_res, 0);
        if (ret != EOK) {
                return ret;
        }

        /* 1x IRQ, 1-2x DMA(8,16), 1-2x IO (MPU is separate). */
        if (hw_res.irqs.count != 1 ||
            (hw_res.io_ranges.count != 1 && hw_res.io_ranges.count != 2) ||
            (hw_res.dma_channels.count != 1 && hw_res.dma_channels.count != 2)) {
                hw_res_list_parsed_clean(&hw_res);
                return EINVAL;
        }

        if (irq)
                *irq = hw_res.irqs.irqs[0];

        if (dma8) {
                if (hw_res.dma_channels.channels[0] < 4) {
                        *dma8 = hw_res.dma_channels.channels[0];
                } else {
                        if (hw_res.dma_channels.count == 2 &&
                            hw_res.dma_channels.channels[1] < 4) {
                                *dma8 = hw_res.dma_channels.channels[1];
                        }
                }
        }

        if (dma16) {
                if (hw_res.dma_channels.channels[0] > 4) {
                        *dma16 = hw_res.dma_channels.channels[0];
                } else {
                        if (hw_res.dma_channels.count == 2 &&
                            hw_res.dma_channels.channels[1] > 4) {
                                *dma16 = hw_res.dma_channels.channels[1];
                        }
                }
        }

        if (hw_res.io_ranges.count == 1) {
                if (pp_sb_regs && *pp_sb_regs)
                        **pp_sb_regs = hw_res.io_ranges.ranges[0];
                if (pp_mpu_regs)
                        *pp_mpu_regs = NULL;
        } else {
                const int sb =
                    (hw_res.io_ranges.ranges[0].size >= sizeof(sb16_regs_t)) ?
                    0 : 1;
                const int mpu = 1 - sb;
                if (pp_sb_regs && *pp_sb_regs)
                        **pp_sb_regs = hw_res.io_ranges.ranges[sb];
                if (pp_mpu_regs && *pp_mpu_regs)
                        **pp_mpu_regs = hw_res.io_ranges.ranges[mpu];
        }

        return EOK;
}

static errno_t sb_enable_interrupt(ddf_dev_t *device, int irq)
{
        async_sess_t *parent_sess = ddf_dev_parent_sess_get(device);
        if (parent_sess == NULL)
                return ENOMEM;

        return hw_res_enable_interrupt(parent_sess, irq);
}

/**
 * @}
 */