![Linus Torvalds](/assets/img/avatar_default.png)
Everybody wants to pass it a function pointer, and in fact, that is what you _must_ pass it for it to make sense (since it knows that ia64 and ppc64 use descriptors for function pointers and fetches the actual address from there). So don't make the argument be a 'unsigned long' and force everybody to add a cast. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
339 lines
7.9 KiB
C
339 lines
7.9 KiB
C
/*
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* This file contains quirk handling code for PnP devices
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* Some devices do not report all their resources, and need to have extra
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* resources added. This is most easily accomplished at initialisation time
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* when building up the resource structure for the first time.
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*
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* Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk>
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*
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* Heavily based on PCI quirks handling which is
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*
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* Copyright (c) 1999 Martin Mares <mj@ucw.cz>
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/pnp.h>
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#include <linux/io.h>
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#include <linux/kallsyms.h>
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#include "base.h"
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static void quirk_awe32_resources(struct pnp_dev *dev)
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{
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struct pnp_port *port, *port2, *port3;
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struct pnp_option *res = dev->dependent;
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/*
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* Unfortunately the isapnp_add_port_resource is too tightly bound
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* into the PnP discovery sequence, and cannot be used. Link in the
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* two extra ports (at offset 0x400 and 0x800 from the one given) by
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* hand.
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*/
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for (; res; res = res->next) {
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port2 = pnp_alloc(sizeof(struct pnp_port));
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if (!port2)
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return;
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port3 = pnp_alloc(sizeof(struct pnp_port));
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if (!port3) {
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kfree(port2);
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return;
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}
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port = res->port;
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memcpy(port2, port, sizeof(struct pnp_port));
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memcpy(port3, port, sizeof(struct pnp_port));
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port->next = port2;
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port2->next = port3;
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port2->min += 0x400;
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port2->max += 0x400;
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port3->min += 0x800;
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port3->max += 0x800;
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dev_info(&dev->dev,
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"AWE32 quirk - added ioports 0x%lx and 0x%lx\n",
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(unsigned long)port2->min,
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(unsigned long)port3->min);
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}
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}
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static void quirk_cmi8330_resources(struct pnp_dev *dev)
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{
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struct pnp_option *res = dev->dependent;
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unsigned long tmp;
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for (; res; res = res->next) {
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struct pnp_irq *irq;
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struct pnp_dma *dma;
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for (irq = res->irq; irq; irq = irq->next) { // Valid irqs are 5, 7, 10
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tmp = 0x04A0;
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bitmap_copy(irq->map, &tmp, 16); // 0000 0100 1010 0000
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}
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for (dma = res->dma; dma; dma = dma->next) // Valid 8bit dma channels are 1,3
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if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
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IORESOURCE_DMA_8BIT)
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dma->map = 0x000A;
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}
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dev_info(&dev->dev, "CMI8330 quirk - forced possible IRQs to 5, 7, 10 "
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"and DMA channels to 1, 3\n");
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}
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static void quirk_sb16audio_resources(struct pnp_dev *dev)
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{
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struct pnp_port *port;
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struct pnp_option *res = dev->dependent;
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int changed = 0;
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/*
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* The default range on the mpu port for these devices is 0x388-0x388.
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* Here we increase that range so that two such cards can be
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* auto-configured.
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*/
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for (; res; res = res->next) {
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port = res->port;
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if (!port)
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continue;
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port = port->next;
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if (!port)
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continue;
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port = port->next;
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if (!port)
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continue;
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if (port->min != port->max)
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continue;
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port->max += 0x70;
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changed = 1;
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}
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if (changed)
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dev_info(&dev->dev, "SB audio device quirk - increased port range\n");
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}
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static struct pnp_option *quirk_isapnp_mpu_options(struct pnp_dev *dev)
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{
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struct pnp_option *head = NULL;
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struct pnp_option *prev = NULL;
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struct pnp_option *res;
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/*
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* Build a functional IRQ-less variant of each MPU option.
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*/
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for (res = dev->dependent; res; res = res->next) {
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struct pnp_option *curr;
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struct pnp_port *port;
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struct pnp_port *copy;
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port = res->port;
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if (!port || !res->irq)
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continue;
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copy = pnp_alloc(sizeof *copy);
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if (!copy)
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break;
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copy->min = port->min;
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copy->max = port->max;
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copy->align = port->align;
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copy->size = port->size;
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copy->flags = port->flags;
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curr = pnp_build_option(PNP_RES_PRIORITY_FUNCTIONAL);
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if (!curr) {
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kfree(copy);
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break;
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}
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curr->port = copy;
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if (prev)
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prev->next = curr;
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else
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head = curr;
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prev = curr;
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}
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if (head)
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dev_info(&dev->dev, "adding IRQ-less MPU options\n");
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return head;
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}
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static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
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{
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struct pnp_option *res;
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struct pnp_irq *irq;
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/*
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* Distribute the independent IRQ over the dependent options
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*/
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res = dev->independent;
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if (!res)
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return;
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irq = res->irq;
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if (!irq || irq->next)
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return;
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res = dev->dependent;
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if (!res)
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return;
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while (1) {
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struct pnp_irq *copy;
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copy = pnp_alloc(sizeof *copy);
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if (!copy)
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break;
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memcpy(copy->map, irq->map, sizeof copy->map);
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copy->flags = irq->flags;
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copy->next = res->irq; /* Yes, this is NULL */
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res->irq = copy;
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if (!res->next)
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break;
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res = res->next;
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}
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kfree(irq);
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res->next = quirk_isapnp_mpu_options(dev);
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res = dev->independent;
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res->irq = NULL;
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}
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static void quirk_isapnp_mpu_resources(struct pnp_dev *dev)
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{
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struct pnp_option *res;
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res = dev->dependent;
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if (!res)
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return;
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while (res->next)
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res = res->next;
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res->next = quirk_isapnp_mpu_options(dev);
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}
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#include <linux/pci.h>
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static void quirk_system_pci_resources(struct pnp_dev *dev)
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{
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struct pci_dev *pdev = NULL;
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struct resource *res;
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resource_size_t pnp_start, pnp_end, pci_start, pci_end;
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int i, j;
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/*
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* Some BIOSes have PNP motherboard devices with resources that
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* partially overlap PCI BARs. The PNP system driver claims these
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* motherboard resources, which prevents the normal PCI driver from
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* requesting them later.
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*
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* This patch disables the PNP resources that conflict with PCI BARs
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* so they won't be claimed by the PNP system driver.
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*/
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for_each_pci_dev(pdev) {
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for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
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if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM) ||
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pci_resource_len(pdev, i) == 0)
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continue;
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pci_start = pci_resource_start(pdev, i);
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pci_end = pci_resource_end(pdev, i);
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for (j = 0;
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(res = pnp_get_resource(dev, IORESOURCE_MEM, j));
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j++) {
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if (res->flags & IORESOURCE_UNSET ||
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(res->start == 0 && res->end == 0))
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continue;
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pnp_start = res->start;
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pnp_end = res->end;
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/*
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* If the PNP region doesn't overlap the PCI
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* region at all, there's no problem.
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*/
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if (pnp_end < pci_start || pnp_start > pci_end)
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continue;
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/*
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* If the PNP region completely encloses (or is
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* at least as large as) the PCI region, that's
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* also OK. For example, this happens when the
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* PNP device describes a bridge with PCI
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* behind it.
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*/
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if (pnp_start <= pci_start &&
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pnp_end >= pci_end)
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continue;
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/*
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* Otherwise, the PNP region overlaps *part* of
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* the PCI region, and that might prevent a PCI
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* driver from requesting its resources.
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*/
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dev_warn(&dev->dev, "mem resource "
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"(0x%llx-0x%llx) overlaps %s BAR %d "
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"(0x%llx-0x%llx), disabling\n",
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(unsigned long long) pnp_start,
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(unsigned long long) pnp_end,
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pci_name(pdev), i,
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(unsigned long long) pci_start,
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(unsigned long long) pci_end);
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res->flags = 0;
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}
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}
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}
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}
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/*
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* PnP Quirks
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* Cards or devices that need some tweaking due to incomplete resource info
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*/
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static struct pnp_fixup pnp_fixups[] = {
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/* Soundblaster awe io port quirk */
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{"CTL0021", quirk_awe32_resources},
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{"CTL0022", quirk_awe32_resources},
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{"CTL0023", quirk_awe32_resources},
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/* CMI 8330 interrupt and dma fix */
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{"@X@0001", quirk_cmi8330_resources},
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/* Soundblaster audio device io port range quirk */
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{"CTL0001", quirk_sb16audio_resources},
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{"CTL0031", quirk_sb16audio_resources},
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{"CTL0041", quirk_sb16audio_resources},
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{"CTL0042", quirk_sb16audio_resources},
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{"CTL0043", quirk_sb16audio_resources},
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{"CTL0044", quirk_sb16audio_resources},
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{"CTL0045", quirk_sb16audio_resources},
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/* Add IRQ-less MPU options */
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{"ADS7151", quirk_ad1815_mpu_resources},
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{"ADS7181", quirk_isapnp_mpu_resources},
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{"AZT0002", quirk_isapnp_mpu_resources},
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/* PnP resources that might overlap PCI BARs */
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{"PNP0c01", quirk_system_pci_resources},
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{"PNP0c02", quirk_system_pci_resources},
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{""}
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};
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void pnp_fixup_device(struct pnp_dev *dev)
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{
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struct pnp_fixup *f;
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for (f = pnp_fixups; *f->id; f++) {
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if (!compare_pnp_id(dev->id, f->id))
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continue;
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#ifdef DEBUG
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dev_dbg(&dev->dev, "%s: calling ", f->id);
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print_fn_descriptor_symbol("%s\n", f->quirk_function);
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#endif
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f->quirk_function(dev);
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}
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}
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