diff options
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 68 |
1 files changed, 44 insertions, 24 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 259d247b755..8e287a828d5 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -15,6 +15,7 @@ #include <linux/pci.h> #include <linux/module.h> #include <linux/spinlock.h> +#include <linux/string.h> #include <asm/dma.h> /* isa_dma_bridge_buggy */ #include "pci.h" @@ -62,11 +63,38 @@ pci_max_busnr(void) return max; } +static int __pci_find_next_cap(struct pci_bus *bus, unsigned int devfn, u8 pos, int cap) +{ + u8 id; + int ttl = 48; + + while (ttl--) { + pci_bus_read_config_byte(bus, devfn, pos, &pos); + if (pos < 0x40) + break; + pos &= ~3; + pci_bus_read_config_byte(bus, devfn, pos + PCI_CAP_LIST_ID, + &id); + if (id == 0xff) + break; + if (id == cap) + return pos; + pos += PCI_CAP_LIST_NEXT; + } + return 0; +} + +int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap) +{ + return __pci_find_next_cap(dev->bus, dev->devfn, + pos + PCI_CAP_LIST_NEXT, cap); +} +EXPORT_SYMBOL_GPL(pci_find_next_capability); + static int __pci_bus_find_cap(struct pci_bus *bus, unsigned int devfn, u8 hdr_type, int cap) { u16 status; - u8 pos, id; - int ttl = 48; + u8 pos; pci_bus_read_config_word(bus, devfn, PCI_STATUS, &status); if (!(status & PCI_STATUS_CAP_LIST)) @@ -75,24 +103,15 @@ static int __pci_bus_find_cap(struct pci_bus *bus, unsigned int devfn, u8 hdr_ty switch (hdr_type) { case PCI_HEADER_TYPE_NORMAL: case PCI_HEADER_TYPE_BRIDGE: - pci_bus_read_config_byte(bus, devfn, PCI_CAPABILITY_LIST, &pos); + pos = PCI_CAPABILITY_LIST; break; case PCI_HEADER_TYPE_CARDBUS: - pci_bus_read_config_byte(bus, devfn, PCI_CB_CAPABILITY_LIST, &pos); + pos = PCI_CB_CAPABILITY_LIST; break; default: return 0; } - while (ttl-- && pos >= 0x40) { - pos &= ~3; - pci_bus_read_config_byte(bus, devfn, pos + PCI_CAP_LIST_ID, &id); - if (id == 0xff) - break; - if (id == cap) - return pos; - pci_bus_read_config_byte(bus, devfn, pos + PCI_CAP_LIST_NEXT, &pos); - } - return 0; + return __pci_find_next_cap(bus, devfn, pos, cap); } /** @@ -252,6 +271,8 @@ pci_restore_bars(struct pci_dev *dev) pci_update_resource(dev, &dev->resource[i], i); } +int (*platform_pci_set_power_state)(struct pci_dev *dev, pci_power_t t); + /** * pci_set_power_state - Set the power state of a PCI device * @dev: PCI device to be suspended @@ -266,7 +287,6 @@ pci_restore_bars(struct pci_dev *dev) * -EIO if device does not support PCI PM. * 0 if we can successfully change the power state. */ -int (*platform_pci_set_power_state)(struct pci_dev *dev, pci_power_t t); int pci_set_power_state(struct pci_dev *dev, pci_power_t state) { @@ -314,19 +334,19 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state) * sets PowerState to 0. */ switch (dev->current_state) { + case PCI_D0: + case PCI_D1: + case PCI_D2: + pmcsr &= ~PCI_PM_CTRL_STATE_MASK; + pmcsr |= state; + break; case PCI_UNKNOWN: /* Boot-up */ if ((pmcsr & PCI_PM_CTRL_STATE_MASK) == PCI_D3hot && !(pmcsr & PCI_PM_CTRL_NO_SOFT_RESET)) need_restore = 1; /* Fall-through: force to D0 */ - case PCI_D3hot: - case PCI_D3cold: - case PCI_POWER_ERROR: - pmcsr = 0; - break; default: - pmcsr &= ~PCI_PM_CTRL_STATE_MASK; - pmcsr |= state; + pmcsr = 0; break; } @@ -808,8 +828,8 @@ pci_clear_mwi(struct pci_dev *dev) /** * pci_intx - enables/disables PCI INTx for device dev - * @dev: the PCI device to operate on - * @enable: boolean + * @pdev: the PCI device to operate on + * @enable: boolean: whether to enable or disable PCI INTx * * Enables/disables PCI INTx for device dev */ |