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pci/pci_ecam: add read_io/write_io for pci ecam 

Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
This commit is contained in:
Bowen Wang 2024-05-06 15:19:04 +08:00 committed by Xiang Xiao
parent f6db814804
commit 6d4cab62fd
1 changed files with 104 additions and 2 deletions
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102
drivers/pci/pci_ecam.c
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@ -55,6 +55,12 @@ static int pci_ecam_write_config(FAR struct pci_bus_s *bus,
unsigned int devfn, int where, int size,
uint32_t val);
static int pci_ecam_read_io(FAR struct pci_bus_s *bus, uintptr_t addr,
int size, FAR uint32_t *val);
static int pci_ecam_write_io(FAR struct pci_bus_s *bus, uintptr_t addr,
int size, uint32_t val);
/****************************************************************************
* Private Types
****************************************************************************/
@ -73,6 +79,8 @@ static const struct pci_ops_s g_pci_ecam_ops =
{
.read = pci_ecam_read_config,
.write = pci_ecam_write_config,
.read_io = pci_ecam_read_io,
.write_io = pci_ecam_write_io,
};
/****************************************************************************
@ -266,6 +274,100 @@ static int pci_ecam_write_config(FAR struct pci_bus_s *bus,
return OK;
}
/****************************************************************************
* Name: pci_ecam_read_io
*
* Description:
* Read data from the specific address.
*
* Input Parameters:
* bus - The bus on this to read reg data
* addr - Data address
* size - Data size
* val - Return value to this var
*
* Returned Value:
* Zero (OK) is returned on success. A negated errno value is returned
* on failure.
*
****************************************************************************/
static int pci_ecam_read_io(FAR struct pci_bus_s *bus, uintptr_t addr,
int size, FAR uint32_t *val)
{
if (!IS_ALIGNED(addr, size))
{
*val = 0;
return -EINVAL;
}
if (size == 4)
{
*val = readl(addr);
}
else if (size == 2)
{
*val = readw(addr);
}
else if (size == 1)
{
*val = readb(addr);
}
else
{
*val = 0;
return -EINVAL;
}
return OK;
}
/****************************************************************************
* Name: pci_ecam_read_io
*
* Description:
* Write data to the specific address.
*
* Input Parameters:
* bus - The bus on this to read reg data
* addr - Data address
* size - Data size
* val - Write this value to specific address
*
* Returned Value:
* Zero (OK) is returned on success. A negated errno value is returned
* on failure.
*
****************************************************************************/
static int pci_ecam_write_io(FAR struct pci_bus_s *bus, uintptr_t addr,
int size, uint32_t val)
{
if (!IS_ALIGNED(addr, size))
{
return -EINVAL;
}
if (size == 4)
{
writel(val, addr);
}
else if (size == 2)
{
writew(val, addr);
}
else if (size == 1)
{
writeb(val, addr);
}
else
{
return -EINVAL;
}
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/