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pci: add pci read/write config/io space interface

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Signed-off-by: lipengfei28 <lipengfei28@xiaomi.com>
This commit is contained in:
lipengfei28 2024-05-31 16:56:23 +08:00 committed by Xiang Xiao
parent d9c8838319
commit 45f1597562
2 changed files with 205 additions and 5 deletions
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126
drivers/pci/pci.c
View File

@ -53,7 +53,7 @@
\
if (!PCI_##len##_BAD) \
{ \
ret = bus->ctrl->ops->read(bus, devfn, where, size, &data); \
ret = pci_bus_read_config(bus, devfn, where, size, &data); \
} \
\
*value = (type)data; \
@ -68,7 +68,7 @@
\
if (!PCI_##len##_BAD) \
{ \
ret = bus->ctrl->ops->write(bus, devfn, where, size, value); \
ret = pci_bus_write_config(bus, devfn, where, size, value); \
} \
\
return ret; \
@ -83,7 +83,7 @@
\
if (!PCI_##len##_BAD) \
{ \
ret = bus->ctrl->ops->read_io(bus, where, size, &data); \
ret = pci_bus_read_io(bus, where, size, &data); \
} \
\
*value = (type)data; \
@ -98,7 +98,7 @@
\
if (!PCI_##len##_BAD) \
{ \
ret = bus->ctrl->ops->write_io(bus, where, size, value); \
ret = pci_bus_write_io(bus, where, size, value); \
} \
\
return ret; \
@ -782,6 +782,122 @@ static void pci_scan_bus(FAR struct pci_bus_s *bus)
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: pci_bus_read_config
*
* Description:
* Read pci device config space
*
* Input Parameters:
* bus - The PCI device belong to
* devfn - The PCI device dev number and function number
* where - The register address
* size - The data length
* val - The data buffer
*
* Returned Value:
* Zero if success, otherwise nagative
*
****************************************************************************/
int pci_bus_read_config(FAR struct pci_bus_s *bus,
unsigned int devfn, int where,
int size, FAR uint32_t *val)
{
if (size != 1 && size != 2 && size != 4)
{
return -EINVAL;
}
return bus->ctrl->ops->read(bus, devfn, where, size, val);
}
/****************************************************************************
* Name: pci_bus_write_config
*
* Description:
* Read pci device config space
*
* Input Parameters:
* bus - The PCI device belong to
* devfn - The PCI device dev number and function number
* where - The register address
* size - The data length
* val - The data
*
* Returned Value:
* Zero if success, otherwise nagative
*
****************************************************************************/
int pci_bus_write_config(FAR struct pci_bus_s *bus,
unsigned int devfn, int where,
int size, uint32_t val)
{
if (size != 1 && size != 2 && size != 4)
{
return -EINVAL;
}
return bus->ctrl->ops->write(bus, devfn, where, size, val);
}
/****************************************************************************
* Name: pci_bus_read_io
*
* Description:
* Read pci device io space
*
* Input Parameters:
* bus - The PCI device belong to
* addr - The address to read
* size - The data length
* val - The data buffer
*
* Returned Value:
* Zero if success, otherwise nagative
*
****************************************************************************/
int pci_bus_read_io(FAR struct pci_bus_s *bus, uintptr_t addr,
int size, FAR uint32_t *val)
{
if (size != 1 && size != 2 && size != 4)
{
return -EINVAL;
}
return bus->ctrl->ops->read_io(bus, addr, size, val);
}
/****************************************************************************
* Name: pci_bus_write_io
*
* Description:
* Read pci device io space
*
* Input Parameters:
* bus - The PCI device belong to
* addr - The address to write
* size - The data length
* val - The data
*
* Returned Value:
* Zero if success, otherwise nagative
*
****************************************************************************/
int pci_bus_write_io(FAR struct pci_bus_s *bus, uintptr_t addr,
int size, uint32_t val)
{
if (size != 1 && size != 2 && size != 4)
{
return -EINVAL;
}
return bus->ctrl->ops->write_io(bus, addr, size, val);
}
/****************************************************************************
* Name: pci_set_master
*
@ -1206,4 +1322,4 @@ PCI_BUS_READ_IO(word, uint16_t, 2)
PCI_BUS_READ_IO(dword, uint32_t, 4)
PCI_BUS_WRITE_IO(byte, uint8_t, 1)
PCI_BUS_WRITE_IO(word, uint16_t, 2)
PCI_BUS_WRITE_IO(dword, uint32_t, 4)
PCI_BUS_WRITE_IO(dword, uint32_t, 4)

84
include/nuttx/pci/pci.h
View File

@ -302,6 +302,90 @@ struct pci_driver_s
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: pci_bus_read_config
*
* Description:
* read pci device config space
*
* Input Parameters:
* bus - The PCI device to belong to
* devfn - The PCI device number and function number
* where - The register address
* size - The length data
* val - The data buf
*
* Returned Value:
* Zero if success, otherwise nagative
*
****************************************************************************/
int pci_bus_read_config(FAR struct pci_bus_s *bus,
unsigned int devfn, int where,
int size, FAR uint32_t *val);
/****************************************************************************
* Name: pci_bus_write_config
*
* Description:
* read pci device config space
*
* Input Parameters:
* bus - The PCI device to belong to
* devfn - The PCI device number and function number
* where - The register address
* size - The length data
* val - The data
*
* Returned Value:
* Zero if success, otherwise nagative
*
****************************************************************************/
int pci_bus_write_config(FAR struct pci_bus_s *bus,
unsigned int devfn, int where,
int size, uint32_t val);
/****************************************************************************
* Name: pci_bus_read_io
*
* Description:
* Read pci device io space
*
* Input Parameters:
* bus - The PCI device belong to
* addr - The address to read
* size - The data length
* val - The data buffer
*
* Returned Value:
* Zero if success, otherwise nagative
*
****************************************************************************/
int pci_bus_read_io(FAR struct pci_bus_s *bus, uintptr_t addr,
int size, FAR uint32_t *val);
/****************************************************************************
* Name: pci_bus_write_io
*
* Description:
* Read pci device io space
*
* Input Parameters:
* bus - The PCI device belong to
* addr - The address to write
* size - The data length
* val - The data
*
* Returned Value:
* Zero if success, otherwise nagative
*
****************************************************************************/
int pci_bus_write_io(FAR struct pci_bus_s *bus, uintptr_t addr,
int size, uint32_t val);
/****************************************************************************
* Name: pci_set_master
*