quirks.c
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上传日期:2013-04-10
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- /*
- * This file contains quirk handling code for ISAPnP devices
- * Some devices do not report all their resources, and need to have extra
- * resources added. This is most easily accomplished at initialisation time
- * when building up the resource structure for the first time.
- *
- * Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk>
- *
- * Heavily based on PCI quirks handling which is
- *
- * Copyright (c) 1999 Martin Mares <mj@ucw.cz>
- */
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/pci.h>
- #include <linux/init.h>
- #include <linux/isapnp.h>
- #include <linux/string.h>
- #if 0
- #define ISAPNP_DEBUG
- #endif
- static void __init quirk_awe32_resources(struct pci_dev *dev)
- {
- struct isapnp_port *port, *port2, *port3;
- struct isapnp_resources *res = dev->sysdata;
- /*
- * Unfortunately the isapnp_add_port_resource is too tightly bound
- * into the PnP discovery sequence, and cannot be used. Link in the
- * two extra ports (at offset 0x400 and 0x800 from the one given) by
- * hand.
- */
- for ( ; res ; res = res->alt ) {
- port2 = isapnp_alloc(sizeof(struct isapnp_port));
- port3 = isapnp_alloc(sizeof(struct isapnp_port));
- if (!port2 || !port3)
- return;
- port = res->port;
- memcpy(port2, port, sizeof(struct isapnp_port));
- memcpy(port3, port, sizeof(struct isapnp_port));
- port->next = port2;
- port2->next = port3;
- port2->min += 0x400;
- port2->max += 0x400;
- port3->min += 0x800;
- port3->max += 0x800;
- }
- printk(KERN_INFO "isapnp: AWE32 quirk - adding two portsn");
- }
- static void __init quirk_cmi8330_resources(struct pci_dev *dev)
- {
- struct isapnp_resources *res = dev->sysdata;
- for ( ; res ; res = res->alt ) {
- struct isapnp_irq *irq;
- struct isapnp_dma *dma;
-
- for( irq = res->irq; irq; irq = irq->next ) // Valid irqs are 5, 7, 10
- irq->map = 0x04A0; // 0000 0100 1010 0000
- for( dma = res->dma; dma; dma = dma->next ) // Valid 8bit dma channels are 1,3
- if( ( dma->flags & IORESOURCE_DMA_TYPE_MASK ) == IORESOURCE_DMA_8BIT )
- dma->map = 0x000A;
- }
- printk(KERN_INFO "isapnp: CMI8330 quirk - fixing interrupts and dman");
- }
- static void __init quirk_sb16audio_resources(struct pci_dev *dev)
- {
- struct isapnp_port *port;
- struct isapnp_resources *res = dev->sysdata;
- int changed = 0;
- /*
- * The default range on the mpu port for these devices is 0x388-0x388.
- * Here we increase that range so that two such cards can be
- * auto-configured.
- */
-
- for( ; res ; res = res->alt ) {
- port = res->port;
- if(!port)
- continue;
- port = port->next;
- if(!port)
- continue;
- port = port->next;
- if(!port)
- continue;
- if(port->min != port->max)
- continue;
- port->max += 0x70;
- changed = 1;
- }
- if(changed)
- printk(KERN_INFO "isapnp: SB audio device quirk - increasing port rangen");
- return;
- }
- /*
- * ISAPnP Quirks
- * Cards or devices that need some tweaking due to broken hardware
- */
- static struct isapnp_fixup isapnp_fixups[] __initdata = {
- /* Soundblaster awe io port quirk */
- { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0021),
- quirk_awe32_resources },
- { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0022),
- quirk_awe32_resources },
- { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0023),
- quirk_awe32_resources },
- /* CMI 8330 interrupt and dma fix */
- { ISAPNP_VENDOR('@','X','@'), ISAPNP_DEVICE(0x0001),
- quirk_cmi8330_resources },
- /* Soundblaster audio device io port range quirk */
- { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0001),
- quirk_sb16audio_resources },
- { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0031),
- quirk_sb16audio_resources },
- { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0041),
- quirk_sb16audio_resources },
- { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0042),
- quirk_sb16audio_resources },
- { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0043),
- quirk_sb16audio_resources },
- { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0044),
- quirk_sb16audio_resources },
- { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0045),
- quirk_sb16audio_resources },
- { 0 }
- };
- void isapnp_fixup_device(struct pci_dev *dev)
- {
- int i = 0;
- while (isapnp_fixups[i].vendor != 0) {
- if ((isapnp_fixups[i].vendor == dev->vendor) &&
- (isapnp_fixups[i].device == dev->device)) {
- #ifdef ISAPNP_DEBUG
- printk(KERN_DEBUG "isapnp: Calling quirk for %02x:%02xn",
- dev->bus->number, dev->devfn);
- #endif
- isapnp_fixups[i].quirk_function(dev);
- }
- i++;
- }
- }