From 3b73a223661ed137c5d3d2635f954382e94f5a43 Mon Sep 17 00:00:00 2001 From: Rene Herman Date: Wed, 14 May 2008 16:05:36 -0700 Subject: pnp: add ISAPnP MPU option quirks The AD181x and AZT230 chips don't support an IRQ-less MPU401 option but work fine without one. This adds (priority functional) IRQ-less options for each port option to help systems with few available IRQs. The AD1815 quirk can't use pnp_register_irq_resource() due to doubly penalizing the IRQ. Also, while not a practical issue due to no IRQ option being present for the dependents, this needs to add in front, not back. Doesn't use pnp_register_port_resource() for symetry with above. This does not delete the AD1815 independent option even though it should be empty after the IRQ transfer due to AD1816 coming with an empty but still present independent option by default. Was tested on AD1815, AD1816 and AZT2320. The ALSA snd-ad1818a driver also support the AZT2002 ID for MPU401 but this doesn't as I was unable to test it. Signed-off-by: Rene Herman Tested-by: Uwe Bugla Acked-by: Uwe Bugla Acked-by: Bjorn Helgaas Cc: Takashi Iwai Cc: Len Brown Signed-off-by: Linus Torvalds --- drivers/pnp/quirks.c | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) (limited to 'drivers/pnp') diff --git a/drivers/pnp/quirks.c b/drivers/pnp/quirks.c index a1af2f98948..ffdb12a59c4 100644 --- a/drivers/pnp/quirks.c +++ b/drivers/pnp/quirks.c @@ -111,6 +111,113 @@ static void quirk_sb16audio_resources(struct pnp_dev *dev) dev_info(&dev->dev, "SB audio device quirk - increased port range\n"); } +static struct pnp_option *quirk_isapnp_mpu_options(struct pnp_dev *dev) +{ + struct pnp_option *head = NULL; + struct pnp_option *prev = NULL; + struct pnp_option *res; + + /* + * Build a functional IRQ-less variant of each MPU option. + */ + + for (res = dev->dependent; res; res = res->next) { + struct pnp_option *curr; + struct pnp_port *port; + struct pnp_port *copy; + + port = res->port; + if (!port || !res->irq) + continue; + + copy = pnp_alloc(sizeof *copy); + if (!copy) + break; + + copy->min = port->min; + copy->max = port->max; + copy->align = port->align; + copy->size = port->size; + copy->flags = port->flags; + + curr = pnp_build_option(PNP_RES_PRIORITY_FUNCTIONAL); + if (!curr) { + kfree(copy); + break; + } + curr->port = copy; + + if (prev) + prev->next = curr; + else + head = curr; + prev = curr; + } + if (head) + dev_info(&dev->dev, "adding IRQ-less MPU options\n"); + + return head; +} + +static void quirk_ad1815_mpu_resources(struct pnp_dev *dev) +{ + struct pnp_option *res; + struct pnp_irq *irq; + + /* + * Distribute the independent IRQ over the dependent options + */ + + res = dev->independent; + if (!res) + return; + + irq = res->irq; + if (!irq || irq->next) + return; + + res = dev->dependent; + if (!res) + return; + + while (1) { + struct pnp_irq *copy; + + copy = pnp_alloc(sizeof *copy); + if (!copy) + break; + + memcpy(copy->map, irq->map, sizeof copy->map); + copy->flags = irq->flags; + + copy->next = res->irq; /* Yes, this is NULL */ + res->irq = copy; + + if (!res->next) + break; + res = res->next; + } + kfree(irq); + + res->next = quirk_isapnp_mpu_options(dev); + + res = dev->independent; + res->irq = NULL; +} + +static void quirk_isapnp_mpu_resources(struct pnp_dev *dev) +{ + struct pnp_option *res; + + res = dev->dependent; + if (!res) + return; + + while (res->next) + res = res->next; + + res->next = quirk_isapnp_mpu_options(dev); +} #include @@ -205,6 +312,11 @@ static struct pnp_fixup pnp_fixups[] = { {"CTL0043", quirk_sb16audio_resources}, {"CTL0044", quirk_sb16audio_resources}, {"CTL0045", quirk_sb16audio_resources}, + /* Add IRQ-less MPU options */ + {"ADS7151", quirk_ad1815_mpu_resources}, + {"ADS7181", quirk_isapnp_mpu_resources}, + {"AZT0002", quirk_isapnp_mpu_resources}, + /* PnP resources that might overlap PCI BARs */ {"PNP0c01", quirk_system_pci_resources}, {"PNP0c02", quirk_system_pci_resources}, {""} -- cgit v1.2.2