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+/*
+ * PCI sound skeleton example
+ *
+ * (c) 1998 Red Hat Software
+ *
+ * This software may be used and distributed according to the
+ * terms of the GNU General Public License, incorporated herein by
+ * reference.
+ *
+ * This example is designed to be built in the linux/drivers/sound
+ * directory as part of a kernel build. The example is modular only
+ * drop me a note once you have a working modular driver and want
+ * to integrate it with the main code.
+ * -- Alan <alan@redhat.com>
+ *
+ * This is a first draft. Please report any errors, corrections or
+ * improvements to me.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+
+#include <asm/io.h>
+
+#include "sound_config.h"
+
+/*
+ * Define our PCI vendor ID here
+ */
+
+#ifndef PCI_VENDOR_MYIDENT
+#define PCI_VENDOR_MYIDENT 0x125D
+
+/*
+ * PCI identity for the card.
+ */
+
+#define PCI_DEVICE_ID_MYIDENT_MYCARD1 0x1969
+#endif
+
+#define CARD_NAME "ExampleWave 3D Pro Ultra ThingyWotsit"
+
+#define MAX_CARDS 8
+
+/*
+ * Each address_info object holds the information about one of
+ * our card resources. In this case the MSS emulation of our
+ * ficticious card. Its used to manage and attach things.
+ */
+
+static struct address_info mss_data[MAX_CARDS];
+static int cards;
+
+/*
+ * Install the actual card. This is an example
+ */
+
+static int mycard_install(struct pci_dev *pcidev)
+{
+ int iobase;
+ int mssbase;
+ int mpubase;
+ u8 x;
+ u16 w;
+ u32 v;
+ int i;
+ int dma;
+
+ /*
+ * Our imaginary code has its I/O on PCI address 0, a
+ * MSS on PCI address 1 and an MPU on address 2
+ *
+ * For the example we will only initialise the MSS
+ */
+
+ iobase = pci_resource_start(pcidev, 0);
+ mssbase = pci_resource_start(pcidev, 1);
+ mpubase = pci_resource_start(pcidev, 2);
+
+ /*
+ * Reset the board
+ */
+
+ /*
+ * Wait for completion. udelay() waits in microseconds
+ */
+
+ udelay(100);
+
+ /*
+ * Ok card ready. Begin setup proper. You might for example
+ * load the firmware here
+ */
+
+ dma = card_specific_magic(ioaddr);
+
+ /*
+ * Turn on legacy mode (example), There are also byte and
+ * dword (32bit) PCI configuration function calls
+ */
+
+ pci_read_config_word(pcidev, 0x40, &w);
+ w&=~(1<<15); /* legacy decode on */
+ w|=(1<<14); /* Reserved write as 1 in this case */
+ w|=(1<<3)|(1<<1)|(1<<0); /* SB on , FM on, MPU on */
+ pci_write_config_word(pcidev, 0x40, w);
+
+ /*
+ * Let the user know we found his toy.
+ */
+
+ printk(KERN_INFO "Programmed "CARD_NAME" at 0x%X to legacy mode.\n",
+ iobase);
+
+ /*
+ * Now set it up the description of the card
+ */
+
+ mss_data[cards].io_base = mssbase;
+ mss_data[cards].irq = pcidev->irq;
+ mss_data[cards].dma = dma;
+
+ /*
+ * Check there is an MSS present
+ */
+
+ if(ad1848_detect(mssbase, NULL, mss_data[cards].osp)==0)
+ return 0;
+
+ /*
+ * Initialize it
+ */
+
+ mss_data[cards].slots[3] = ad1848_init("MyCard MSS 16bit",
+ mssbase,
+ mss_data[cards].irq,
+ mss_data[cards].dma,
+ mss_data[cards].dma,
+ 0,
+ 0,
+ THIS_MODULE);
+
+ cards++;
+ return 1;
+}
+
+
+/*
+ * This loop walks the PCI configuration database and finds where
+ * the sound cards are.
+ */
+
+int init_mycard(void)
+{
+ struct pci_dev *pcidev=NULL;
+ int count=0;
+
+ while((pcidev = pci_find_device(PCI_VENDOR_MYIDENT, PCI_DEVICE_ID_MYIDENT_MYCARD1, pcidev))!=NULL)
+ {
+ if (pci_enable_device(pcidev))
+ continue;
+ count+=mycard_install(pcidev);
+ if(count)
+ return 0;
+ if(count==MAX_CARDS)
+ break;
+ }
+
+ if(count==0)
+ return -ENODEV;
+ return 0;
+}
+
+/*
+ * This function is called when the user or kernel loads the
+ * module into memory.
+ */
+
+
+int init_module(void)
+{
+ if(init_mycard()<0)
+ {
+ printk(KERN_ERR "No "CARD_NAME" cards found.\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/*
+ * This is called when it is removed. It will only be removed
+ * when its use count is 0.
+ */
+
+void cleanup_module(void)
+{
+ for(i=0;i< cards; i++)
+ {
+ /*
+ * Free attached resources
+ */
+
+ ad1848_unload(mss_data[i].io_base,
+ mss_data[i].irq,
+ mss_data[i].dma,
+ mss_data[i].dma,
+ 0);
+ /*
+ * And disconnect the device from the kernel
+ */
+ sound_unload_audiodevice(mss_data[i].slots[3]);
+ }
+}
+