/*
 * Copyright (C) by Hannu Savolainen 1993-1997
 *
 *      cs4232.c
 *
 * The low level driver for Crystal CS4232 based cards. The CS4232 is
 * a PnP compatible chip which contains a CS4231A codec, SB emulation,
 * a MPU401 compatible MIDI port, joystick and synthesizer and IDE CD-ROM 
 * interfaces. This is just a temporary driver until full PnP support
 * gets implemented. Just the WSS codec, FM synth and the MIDI ports are
 * supported. Other interfaces are left uninitialized.
 *
 * ifdef ...WAVEFRONT...
 * 
 *   Support is provided for initializing the WaveFront synth
 *   interface as well, which is logical device #4. Note that if
 *   you have a Tropez+ card, you probably don't need to setup
 *   the CS4232-supported MIDI interface, since it corresponds to
 *   the internal 26-pin header that's hard to access. Using this
 *   requires an additional IRQ, a resource none too plentiful in
 *   this environment. Just don't set module parameters mpuio and
 *   mpuirq, and the MIDI port will be left uninitialized. You can
 *   still use the ICS2115 hosted MIDI interface which corresponds
 *   to the 9-pin D connector on the back of the card.
 *
 * endif  ...WAVEFRONT...
 *
 * Supported chips are:
 *      CS4232
 *      CS4236
 *      CS4236B
 *
 * Note: You will need a PnP config setup to initialise some CS4232 boards
 * anyway.
 *
 * Changes
 *      John Rood               Added Bose Sound System Support.
 *      Toshio Spoor
 *      Alan Cox                Modularisation, Basic cleanups.
 *      Paul Barton-Davis       Separated MPU configuration, added
 *                                       Tropez+ (WaveFront) support
 *      Christoph Hellwig       Adapted to module_init/module_exit,
 *                                      simple cleanups
 *      Arnaldo C. de Melo      got rid of attach_uart401
 *      Bartlomiej Zolnierkiewicz
 *                              Added some __init/__initdata/__exit
 *      Marcus Meissner         Added ISA PnP support.
 */

#include <linux/config.h>
#include <linux/isapnp.h>
#include <linux/module.h>
#include <linux/init.h>

#include "sound_config.h"

#include "cs4232.h"
#include "ad1848.h"
#include "mpu401.h"

#define KEY_PORT        0x279   /* Same as LPT1 status port */
#define CSN_NUM         0x99    /* Just a random number */
#define INDEX_ADDRESS   0x00    /* (R0) Index Address Register */
#define INDEX_DATA      0x01    /* (R1) Indexed Data Register */
#define PIN_CONTROL     0x0a    /* (I10) Pin Control */
#define ENABLE_PINS     0xc0    /* XCTRL0/XCTRL1 enable */

static void CS_OUT(unsigned char a)
{
        outb(a, KEY_PORT);
}

#define CS_OUT2(a, b)           {CS_OUT(a);CS_OUT(b);}
#define CS_OUT3(a, b, c)        {CS_OUT(a);CS_OUT(b);CS_OUT(c);}

static int __initdata bss       = 0;
static int mpu_base = 0, mpu_irq = 0;
static int synth_base = 0, synth_irq = 0;
static int mpu_detected = 0;

int __init probe_cs4232_mpu(struct address_info *hw_config)
{
        /*
         *      Just write down the config values.
         */

        mpu_base = hw_config->io_base;
        mpu_irq = hw_config->irq;

        return 1;
}

static unsigned char crystal_key[] __initdata = /* A 32 byte magic key sequence */
{
        0x96, 0x35, 0x9a, 0xcd, 0xe6, 0xf3, 0x79, 0xbc,
        0x5e, 0xaf, 0x57, 0x2b, 0x15, 0x8a, 0xc5, 0xe2,
        0xf1, 0xf8, 0x7c, 0x3e, 0x9f, 0x4f, 0x27, 0x13,
        0x09, 0x84, 0x42, 0xa1, 0xd0, 0x68, 0x34, 0x1a
};

static void sleep(unsigned howlong)
{
        current->state = TASK_INTERRUPTIBLE;
        schedule_timeout(howlong);
}

static void enable_xctrl(int baseio)
{
        unsigned char regd;
                
        /*
         * Some IBM Aptiva's have the Bose Sound System. By default
         * the Bose Amplifier is disabled. The amplifier will be 
         * activated, by setting the XCTRL0 and XCTRL1 bits.
         * Volume of the monitor bose speakers/woofer, can then
         * be set by changing the PCM volume.
         *
         */
                
        printk("cs4232: enabling Bose Sound System Amplifier.\n");
        
        /* Switch to Pin Control Address */                   
        regd = inb(baseio + INDEX_ADDRESS) & 0xe0;
        outb(((unsigned char) (PIN_CONTROL | regd)), baseio + INDEX_ADDRESS );
        
        /* Activate the XCTRL0 and XCTRL1 Pins */
        regd = inb(baseio + INDEX_DATA);
        outb(((unsigned char) (ENABLE_PINS | regd)), baseio + INDEX_DATA );
}

int __init probe_cs4232(struct address_info *hw_config, int isapnp_configured)
{
        int i, n;
        int base = hw_config->io_base, irq = hw_config->irq;
        int dma1 = hw_config->dma, dma2 = hw_config->dma2;

        /*
         * Verify that the I/O port range is free.
         */

        if (check_region(base, 4))
        {
                printk(KERN_ERR "cs4232.c: I/O port 0x%03x not free\n", base);
                return 0;
        }
        if (ad1848_detect(hw_config->io_base, NULL, hw_config->osp)) {
                return 1;       /* The card is already active */
        }
        if (isapnp_configured) {
                printk(KERN_ERR "cs4232.c: ISA PnP configured, but not detected?\n");
                return 0;
        }

        /*
         * This version of the driver doesn't use the PnP method when configuring
         * the card but a simplified method defined by Crystal. This means that
         * just one CS4232 compatible device can exist on the system. Also this
         * method conflicts with possible PnP support in the OS. For this reason 
         * driver is just a temporary kludge.
         *
         * Also the Cirrus/Crystal method doesn't always work. Try ISA PnP first ;)
         */

        /*
         * Repeat initialization few times since it doesn't always succeed in
         * first time.
         */

        for (n = 0; n < 4; n++)
        {       
                /*
                 *      Wake up the card by sending a 32 byte Crystal key to the key port.
                 */
                
                for (i = 0; i < 32; i++)
                        CS_OUT(crystal_key[i]);

                sleep(HZ / 10);

                /*
                 *      Now set the CSN (Card Select Number).
                 */

                CS_OUT2(0x06, CSN_NUM);

                /*
                 *      Then set some config bytes. First logical device 0 
                 */

                CS_OUT2(0x15, 0x00);    /* Select logical device 0 (WSS/SB/FM) */
                CS_OUT3(0x47, (base >> 8) & 0xff, base & 0xff); /* WSS base */

                if (check_region(0x388, 4))     /* Not free */
                        CS_OUT3(0x48, 0x00, 0x00)       /* FM base off */
                else
                        CS_OUT3(0x48, 0x03, 0x88);      /* FM base 0x388 */

                CS_OUT3(0x42, 0x00, 0x00);      /* SB base off */
                CS_OUT2(0x22, irq);             /* SB+WSS IRQ */
                CS_OUT2(0x2a, dma1);            /* SB+WSS DMA */

                if (dma2 != -1)
                        CS_OUT2(0x25, dma2)     /* WSS DMA2 */
                else
                        CS_OUT2(0x25, 4);       /* No WSS DMA2 */

                CS_OUT2(0x33, 0x01);    /* Activate logical dev 0 */

                sleep(HZ / 10);

                /*
                 * Initialize logical device 3 (MPU)
                 */

                if (mpu_base != 0 && mpu_irq != 0)
                {
                        CS_OUT2(0x15, 0x03);    /* Select logical device 3 (MPU) */
                        CS_OUT3(0x47, (mpu_base >> 8) & 0xff, mpu_base & 0xff); /* MPU base */
                        CS_OUT2(0x22, mpu_irq); /* MPU IRQ */
                        CS_OUT2(0x33, 0x01);    /* Activate logical dev 3 */
                }

                if(synth_base != 0)
                {
                    CS_OUT2 (0x15, 0x04);               /* logical device 4 (WaveFront) */
                    CS_OUT3 (0x47, (synth_base >> 8) & 0xff,
                             synth_base & 0xff);        /* base */
                    CS_OUT2 (0x22, synth_irq);          /* IRQ */
                    CS_OUT2 (0x33, 0x01);               /* Activate logical dev 4 */
                }

                /*
                 * Finally activate the chip
                 */
                
                CS_OUT(0x79);

                sleep(HZ / 5);

                /*
                 * Then try to detect the codec part of the chip
                 */

                if (ad1848_detect(hw_config->io_base, NULL, hw_config->osp))
                        return 1;
                
                sleep(HZ);
        }
        return 0;
}

void __init attach_cs4232(struct address_info *hw_config)
{
        int base = hw_config->io_base,
                irq = hw_config->irq,
                dma1 = hw_config->dma,
                dma2 = hw_config->dma2;

        if (base == -1 || irq == -1 || dma1 == -1) {
                printk(KERN_ERR "cs4232: dma, irq and io must be set.\n");
                return;
        }

        if (dma2 == -1)
                dma2 = dma1;

        hw_config->slots[0] = ad1848_init("Crystal audio controller", base,
                                          irq,
                                          dma1,         /* Playback DMA */
                                          dma2,         /* Capture DMA */
                                          0,
                                          hw_config->osp,
                                          THIS_MODULE);

        if (hw_config->slots[0] != -1 &&
                audio_devs[hw_config->slots[0]]->mixer_dev!=-1)
        {       
                /* Assume the mixer map is as suggested in the CS4232 databook */
                AD1848_REROUTE(SOUND_MIXER_LINE1, SOUND_MIXER_LINE);
                AD1848_REROUTE(SOUND_MIXER_LINE2, SOUND_MIXER_CD);
                AD1848_REROUTE(SOUND_MIXER_LINE3, SOUND_MIXER_SYNTH);           /* FM synth */
        }
        if (mpu_base != 0 && mpu_irq != 0)
        {
                static struct address_info hw_config2 = {
                        0
                };              /* Ensure it's initialized */

                hw_config2.io_base = mpu_base;
                hw_config2.irq = mpu_irq;
                hw_config2.dma = -1;
                hw_config2.dma2 = -1;
                hw_config2.always_detect = 0;
                hw_config2.name = NULL;
                hw_config2.driver_use_1 = 0;
                hw_config2.driver_use_2 = 0;
                hw_config2.card_subtype = 0;

                if (probe_uart401(&hw_config2, THIS_MODULE))
                {
                        mpu_detected = 1;
                }
                else
                {
                        mpu_base = mpu_irq = 0;
                }
                hw_config->slots[1] = hw_config2.slots[1];
        }
        
        if (bss)
        {
                enable_xctrl(base);
        }
}

void unload_cs4232(struct address_info *hw_config)
{
        int base = hw_config->io_base, irq = hw_config->irq;
        int dma1 = hw_config->dma, dma2 = hw_config->dma2;

        if (dma2 == -1)
                dma2 = dma1;

        ad1848_unload(base,
                      irq,
                      dma1,     /* Playback DMA */
                      dma2,     /* Capture DMA */
                      0);

        sound_unload_audiodev(hw_config->slots[0]);
        if (mpu_base != 0 && mpu_irq != 0 && mpu_detected)
        {
                static struct address_info hw_config2 =
                {
                        0
                };              /* Ensure it's initialized */

                hw_config2.io_base = mpu_base;
                hw_config2.irq = mpu_irq;
                hw_config2.dma = -1;
                hw_config2.dma2 = -1;
                hw_config2.always_detect = 0;
                hw_config2.name = NULL;
                hw_config2.driver_use_1 = 0;
                hw_config2.driver_use_2 = 0;
                hw_config2.card_subtype = 0;
                hw_config2.slots[1] = hw_config->slots[1];

                unload_uart401(&hw_config2);
        }
}

static struct address_info cfg;
static struct address_info cfg_mpu;

static int __initdata io        = -1;
static int __initdata irq       = -1;
static int __initdata dma       = -1;
static int __initdata dma2      = -1;
static int __initdata mpuio     = -1;
static int __initdata mpuirq    = -1;
static int __initdata synthio   = -1;
static int __initdata synthirq  = -1;
static int __initdata isapnp    = 1;

MODULE_DESCRIPTION("CS4232 based soundcard driver"); 
MODULE_AUTHOR("Hannu Savolainen, Paul Barton-Davis"); 
MODULE_LICENSE("GPL");

MODULE_PARM(io,"i");
MODULE_PARM_DESC(io,"base I/O port for AD1848");
MODULE_PARM(irq,"i");
MODULE_PARM_DESC(irq,"IRQ for AD1848 chip");
MODULE_PARM(dma,"i");
MODULE_PARM_DESC(dma,"8 bit DMA for AD1848 chip");
MODULE_PARM(dma2,"i");
MODULE_PARM_DESC(dma2,"16 bit DMA for AD1848 chip");
MODULE_PARM(mpuio,"i");
MODULE_PARM_DESC(mpuio,"MPU 401 base address");
MODULE_PARM(mpuirq,"i");
MODULE_PARM_DESC(mpuirq,"MPU 401 IRQ");
MODULE_PARM(synthio,"i");
MODULE_PARM_DESC(synthio,"Maui WaveTable base I/O port");
MODULE_PARM(synthirq,"i");
MODULE_PARM_DESC(synthirq,"Maui WaveTable IRQ");
MODULE_PARM(isapnp,"i");
MODULE_PARM_DESC(isapnp,"Enable ISAPnP probing (default 1)");
MODULE_PARM(bss,"i");
MODULE_PARM_DESC(bss,"Enable Bose Sound System Support (default 0)");

/*
 *      Install a CS4232 based card. Need to have ad1848 and mpu401
 *      loaded ready.
 */

/* All cs4232 based cards have the main ad1848 card either as CSC0000 or
 * CSC0100. */
struct isapnp_device_id isapnp_cs4232_list[] __initdata = {
        {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
                ISAPNP_VENDOR('C','S','C'), ISAPNP_FUNCTION(0x0100),
                0 },
        {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
                ISAPNP_VENDOR('C','S','C'), ISAPNP_FUNCTION(0x0000),
                0 },
        /* Guillemot Turtlebeach something appears to be cs4232 compatible
         * (untested) */
        {       ISAPNP_VENDOR('C','S','C'), ISAPNP_ANY_ID,
                ISAPNP_VENDOR('G','I','M'), ISAPNP_FUNCTION(0x0100),
                0 },
        {0}
};

MODULE_DEVICE_TABLE(isapnp, isapnp_cs4232_list);

int cs4232_isapnp_probe(struct pci_dev *dev, const struct isapnp_device_id *id)
{
        int ret;
        struct address_info *isapnpcfg;

        isapnpcfg=(struct address_info*)kmalloc(sizeof(*isapnpcfg),GFP_KERNEL);
        if (!isapnpcfg) 
                return -ENOMEM;
        /*
         * If device is active, assume configured with /proc/isapnp
         * and use anyway. Any other way to check this?
         */
        ret = dev->prepare(dev);
        if(ret && ret != -EBUSY) {
                printk(KERN_ERR "cs4232: ISA PnP found device that could not be autoconfigured.\n");
                kfree(isapnpcfg);
                return -ENODEV;
        }
        if(ret != -EBUSY) {
                if(dev->activate(dev) < 0) {
                        printk(KERN_WARNING "cs4232: ISA PnP activate failed\n");
                        kfree(isapnpcfg);
                        return -ENODEV;
                }
        } /* else subfunction is already activated */

        isapnpcfg->irq          = dev->irq_resource[0].start;
        isapnpcfg->dma          = dev->dma_resource[0].start;
        isapnpcfg->dma2         = dev->dma_resource[1].start;
        isapnpcfg->io_base      = dev->resource[0].start;
        if (probe_cs4232(isapnpcfg,TRUE) == 0) {
                printk(KERN_ERR "cs4232: ISA PnP card found, but not detected?\n");
                kfree(isapnpcfg);
                return -ENODEV;
        }
        attach_cs4232(isapnpcfg);
        pci_set_drvdata(dev,isapnpcfg);
        return 0;
}

static int __init init_cs4232(void)
{
#ifdef CONFIG_SOUND_WAVEFRONT_MODULE
        if(synthio == -1)
                printk(KERN_INFO "cs4232: set synthio and synthirq to use the wavefront facilities.\n");
        else {
                synth_base = synthio;
                synth_irq =  synthirq;  
        }
#else
        if(synthio != -1)
                printk(KERN_WARNING "cs4232: wavefront support not enabled in this driver.\n");
#endif
        cfg.irq = -1;

        if (isapnp &&
            (isapnp_probe_devs(isapnp_cs4232_list, cs4232_isapnp_probe) > 0)
        )
                return 0;

        if(io==-1||irq==-1||dma==-1)
        {
                printk(KERN_ERR "cs4232: Must set io, irq and dma.\n");
                return -ENODEV;
        }

        cfg.io_base = io;
        cfg.irq = irq;
        cfg.dma = dma;
        cfg.dma2 = dma2;

        cfg_mpu.io_base = -1;
        cfg_mpu.irq = -1;

        if (mpuio != -1 && mpuirq != -1) {
                cfg_mpu.io_base = mpuio;
                cfg_mpu.irq = mpuirq;
                probe_cs4232_mpu(&cfg_mpu); /* Bug always returns 0 not OK -- AC */
        }

        if (probe_cs4232(&cfg,FALSE) == 0)
                return -ENODEV;
        attach_cs4232(&cfg);
        
        return 0;
}

int cs4232_isapnp_remove(struct pci_dev *dev, const struct isapnp_device_id *id)
{
        struct address_info *cfg = (struct address_info*)pci_get_drvdata(dev);
        if (cfg) unload_cs4232(cfg);
        pci_set_drvdata(dev,NULL);
        dev->deactivate(dev);
        return 0;
}

static void __exit cleanup_cs4232(void)
{
        isapnp_probe_devs(isapnp_cs4232_list, cs4232_isapnp_remove);
        if (cfg.irq != -1)
                unload_cs4232(&cfg); /* Unloads global MPU as well, if needed */
}

module_init(init_cs4232);
module_exit(cleanup_cs4232);

#ifndef MODULE
static int __init setup_cs4232(char *str)
{
        /* io, irq, dma, dma2 mpuio, mpuirq*/
        int ints[7];

        /* If we have isapnp cards, no need for options */
        if (isapnp_probe_devs(isapnp_cs4232_list, cs4232_isapnp_probe) > 0)
                return 1;
        
        str = get_options(str, ARRAY_SIZE(ints), ints);
        
        io      = ints[1];
        irq     = ints[2];
        dma     = ints[3];
        dma2    = ints[4];
        mpuio   = ints[5];
        mpuirq  = ints[6];

        return 1;
}

__setup("cs4232=", setup_cs4232);
#endif