core.c

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/*
 * Copyright (C) 2010 Bluecherry, LLC www.bluecherrydvr.com
 * Copyright (C) 2010 Ben Collins <[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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include "solo6x10.h"
#include "tw28.h"

MODULE_DESCRIPTION("Softlogic 6x10 MP4/H.264 Encoder/Decoder V4L2/ALSA Driver");
MODULE_AUTHOR("Ben Collins <[email protected]>");
MODULE_VERSION(SOLO6X10_VERSION);
MODULE_LICENSE("GPL");

void solo_irq_on(struct solo_dev *solo_dev, u32 mask)
{
    solo_dev->irq_mask |= mask;
    solo_reg_write(solo_dev, SOLO_IRQ_ENABLE, solo_dev->irq_mask);
}

void solo_irq_off(struct solo_dev *solo_dev, u32 mask)
{
    solo_dev->irq_mask &= ~mask;
    solo_reg_write(solo_dev, SOLO_IRQ_ENABLE, solo_dev->irq_mask);
}

/* XXX We should check the return value of the sub-device ISR's */
static irqreturn_t solo_isr(int irq, void *data)
{
    struct solo_dev *solo_dev = data;
    u32 status;
    int i;

    status = solo_reg_read(solo_dev, SOLO_IRQ_STAT);
    if (!status)
        return IRQ_NONE;

    if (status & ~solo_dev->irq_mask) {
        solo_reg_write(solo_dev, SOLO_IRQ_STAT,
                   status & ~solo_dev->irq_mask);
        status &= solo_dev->irq_mask;
    }

    if (status & SOLO_IRQ_PCI_ERR) {
        u32 err = solo_reg_read(solo_dev, SOLO_PCI_ERR);
        solo_p2m_error_isr(solo_dev, err);
        solo_reg_write(solo_dev, SOLO_IRQ_STAT, SOLO_IRQ_PCI_ERR);
    }

    for (i = 0; i < SOLO_NR_P2M; i++)
        if (status & SOLO_IRQ_P2M(i))
            solo_p2m_isr(solo_dev, i);

    if (status & SOLO_IRQ_IIC)
        solo_i2c_isr(solo_dev);

    if (status & SOLO_IRQ_VIDEO_IN)
        solo_video_in_isr(solo_dev);

    /* Call this first so enc gets detected flag set */
    if (status & SOLO_IRQ_MOTION)
        solo_motion_isr(solo_dev);

    if (status & SOLO_IRQ_ENCODER)
        solo_enc_v4l2_isr(solo_dev);

    if (status & SOLO_IRQ_G723)
        solo_g723_isr(solo_dev);

    return IRQ_HANDLED;
}

static void free_solo_dev(struct solo_dev *solo_dev)
{
    struct pci_dev *pdev;

    if (!solo_dev)
        return;

    pdev = solo_dev->pdev;

    /* If we never initialized the PCI device, then nothing else
     * below here needs cleanup */
    if (!pdev) {
        kfree(solo_dev);
        return;
    }

    /* Bring down the sub-devices first */
    solo_g723_exit(solo_dev);
    solo_enc_v4l2_exit(solo_dev);
    solo_enc_exit(solo_dev);
    solo_v4l2_exit(solo_dev);
    solo_disp_exit(solo_dev);
    solo_gpio_exit(solo_dev);
    solo_p2m_exit(solo_dev);
    solo_i2c_exit(solo_dev);

    /* Now cleanup the PCI device */
    if (solo_dev->reg_base) {
        solo_irq_off(solo_dev, ~0);
        pci_iounmap(pdev, solo_dev->reg_base);
        free_irq(pdev->irq, solo_dev);
    }

    pci_release_regions(pdev);
    pci_disable_device(pdev);
    pci_set_drvdata(pdev, NULL);

    kfree(solo_dev);
}

static int __devinit solo_pci_probe(struct pci_dev *pdev,
                    const struct pci_device_id *id)
{
    struct solo_dev *solo_dev;
    int ret;
    int sdram;
    u8 chip_id;
    u32 reg;

    solo_dev = kzalloc(sizeof(*solo_dev), GFP_KERNEL);
    if (solo_dev == NULL)
        return -ENOMEM;

    solo_dev->pdev = pdev;
    spin_lock_init(&solo_dev->reg_io_lock);
    pci_set_drvdata(pdev, solo_dev);

    ret = pci_enable_device(pdev);
    if (ret)
        goto fail_probe;

    pci_set_master(pdev);

    ret = pci_request_regions(pdev, SOLO6X10_NAME);
    if (ret)
        goto fail_probe;

    solo_dev->reg_base = pci_ioremap_bar(pdev, 0);
    if (solo_dev->reg_base == NULL) {
        ret = -ENOMEM;
        goto fail_probe;
    }

    chip_id = solo_reg_read(solo_dev, SOLO_CHIP_OPTION) &
                    SOLO_CHIP_ID_MASK;
    switch (chip_id) {
    case 7:
        solo_dev->nr_chans = 16;
        solo_dev->nr_ext = 5;
        break;
    case 6:
        solo_dev->nr_chans = 8;
        solo_dev->nr_ext = 2;
        break;
    default:
        dev_warn(&pdev->dev, "Invalid chip_id 0x%02x, "
             "defaulting to 4 channels\n",
             chip_id);
    case 5:
        solo_dev->nr_chans = 4;
        solo_dev->nr_ext = 1;
    }

    solo_dev->flags = id->driver_data;

    /* Disable all interrupts to start */
    solo_irq_off(solo_dev, ~0);

    reg = SOLO_SYS_CFG_SDRAM64BIT;
    /* Initial global settings */
    if (!(solo_dev->flags & FLAGS_6110))
        reg |= SOLO6010_SYS_CFG_INPUTDIV(25) |
            SOLO6010_SYS_CFG_FEEDBACKDIV((SOLO_CLOCK_MHZ * 2) - 2) |
            SOLO6010_SYS_CFG_OUTDIV(3);
    solo_reg_write(solo_dev, SOLO_SYS_CFG, reg);

    if (solo_dev->flags & FLAGS_6110) {
        u32 sys_clock_MHz = SOLO_CLOCK_MHZ;
        u32 pll_DIVQ;
        u32 pll_DIVF;

        if (sys_clock_MHz < 125) {
            pll_DIVQ = 3;
            pll_DIVF = (sys_clock_MHz * 4) / 3;
        } else {
            pll_DIVQ = 2;
            pll_DIVF = (sys_clock_MHz * 2) / 3;
        }

        solo_reg_write(solo_dev, SOLO6110_PLL_CONFIG,
                   SOLO6110_PLL_RANGE_5_10MHZ |
                   SOLO6110_PLL_DIVR(9) |
                   SOLO6110_PLL_DIVQ_EXP(pll_DIVQ) |
                   SOLO6110_PLL_DIVF(pll_DIVF) | SOLO6110_PLL_FSEN);
        mdelay(1);      /* PLL Locking time (1ms) */

        solo_reg_write(solo_dev, SOLO_DMA_CTRL1, 3 << 8); /* ? */
    } else
        solo_reg_write(solo_dev, SOLO_DMA_CTRL1, 1 << 8); /* ? */

    solo_reg_write(solo_dev, SOLO_TIMER_CLOCK_NUM, SOLO_CLOCK_MHZ - 1);

    /* PLL locking time of 1ms */
    mdelay(1);

    ret = request_irq(pdev->irq, solo_isr, IRQF_SHARED, SOLO6X10_NAME,
              solo_dev);
    if (ret)
        goto fail_probe;

    /* Handle this from the start */
    solo_irq_on(solo_dev, SOLO_IRQ_PCI_ERR);

    ret = solo_i2c_init(solo_dev);
    if (ret)
        goto fail_probe;

    /* Setup the DMA engine */
    sdram = (solo_dev->nr_chans >= 8) ? 2 : 1;
    solo_reg_write(solo_dev, SOLO_DMA_CTRL,
               SOLO_DMA_CTRL_REFRESH_CYCLE(1) |
               SOLO_DMA_CTRL_SDRAM_SIZE(sdram) |
               SOLO_DMA_CTRL_SDRAM_CLK_INVERT |
               SOLO_DMA_CTRL_READ_CLK_SELECT |
               SOLO_DMA_CTRL_LATENCY(1));

    ret = solo_p2m_init(solo_dev);
    if (ret)
        goto fail_probe;

    ret = solo_disp_init(solo_dev);
    if (ret)
        goto fail_probe;

    ret = solo_gpio_init(solo_dev);
    if (ret)
        goto fail_probe;

    ret = solo_tw28_init(solo_dev);
    if (ret)
        goto fail_probe;

    ret = solo_v4l2_init(solo_dev);
    if (ret)
        goto fail_probe;

    ret = solo_enc_init(solo_dev);
    if (ret)
        goto fail_probe;

    ret = solo_enc_v4l2_init(solo_dev);
    if (ret)
        goto fail_probe;

    ret = solo_g723_init(solo_dev);
    if (ret)
        goto fail_probe;

    return 0;

fail_probe:
    free_solo_dev(solo_dev);
    return ret;
}

static void __devexit solo_pci_remove(struct pci_dev *pdev)
{
    struct solo_dev *solo_dev = pci_get_drvdata(pdev);

    free_solo_dev(solo_dev);
}

static struct pci_device_id solo_id_table[] = {
    /* 6010 based cards */
    {PCI_DEVICE(PCI_VENDOR_ID_SOFTLOGIC, PCI_DEVICE_ID_SOLO6010)},
    {PCI_DEVICE(PCI_VENDOR_ID_SOFTLOGIC, PCI_DEVICE_ID_SOLO6110),
     .driver_data = FLAGS_6110},
    {PCI_DEVICE(PCI_VENDOR_ID_BLUECHERRY, PCI_DEVICE_ID_NEUSOLO_4)},
    {PCI_DEVICE(PCI_VENDOR_ID_BLUECHERRY, PCI_DEVICE_ID_NEUSOLO_9)},
    {PCI_DEVICE(PCI_VENDOR_ID_BLUECHERRY, PCI_DEVICE_ID_NEUSOLO_16)},
    {PCI_DEVICE(PCI_VENDOR_ID_BLUECHERRY, PCI_DEVICE_ID_BC_SOLO_4)},
    {PCI_DEVICE(PCI_VENDOR_ID_BLUECHERRY, PCI_DEVICE_ID_BC_SOLO_9)},
    {PCI_DEVICE(PCI_VENDOR_ID_BLUECHERRY, PCI_DEVICE_ID_BC_SOLO_16)},
    /* 6110 based cards */
    {PCI_DEVICE(PCI_VENDOR_ID_BLUECHERRY, PCI_DEVICE_ID_BC_6110_4)},
    {PCI_DEVICE(PCI_VENDOR_ID_BLUECHERRY, PCI_DEVICE_ID_BC_6110_8)},
    {PCI_DEVICE(PCI_VENDOR_ID_BLUECHERRY, PCI_DEVICE_ID_BC_6110_16)},
    {0,}
};

MODULE_DEVICE_TABLE(pci, solo_id_table);

static struct pci_driver solo_pci_driver = {
    .name = SOLO6X10_NAME,
    .id_table = solo_id_table,
    .probe = solo_pci_probe,
    .remove = solo_pci_remove,
};

module_pci_driver(solo_pci_driver);