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pci: sh7751: Convert to DM and DT probing

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Convert the SH7751 PCI driver to DM and add DT probing.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Marek Vasut 2019-09-01 15:56:41 +02:00 • committed by Marek Vasut
parent 8c2c46350d
commit 72c2f4acd7
1 changed files with 106 additions and 58 deletions
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78
drivers/pci/pci_sh7751.c
View file

@ -6,6 +6,7 @@
*/
#include <common.h>
#include <dm.h>
#include <pci.h>
#include <asm/processor.h>
#include <asm/io.h>
@ -71,30 +72,61 @@
#define p4_in(addr) (*addr)
#define p4_out(data, addr) (*addr) = (data)
/* Double word */
int pci_sh4_read_config_dword(struct pci_controller *hose,
pci_dev_t dev, int offset, u32 *value)
static int sh7751_pci_addr_valid(pci_dev_t d, uint offset)
{
u32 par_data = 0x80000000 | dev;
p4_out(par_data | (offset & 0xfc), SH7751_PCIPAR);
*value = p4_in(SH7751_PCIPDR);
if (PCI_FUNC(d))
return -EINVAL;
return 0;
}
int pci_sh4_write_config_dword(struct pci_controller *hose,
pci_dev_t dev, int offset, u32 value)
static u32 get_bus_address(struct udevice *dev, pci_dev_t bdf, u32 offset)
{
u32 par_data = 0x80000000 | dev;
return BIT(31) | (PCI_DEV(bdf) << 8) | (offset & ~3);
}
p4_out(par_data | (offset & 0xfc), SH7751_PCIPAR);
p4_out(value, SH7751_PCIPDR);
static int sh7751_pci_read_config(struct udevice *dev, pci_dev_t bdf,
uint offset, ulong *value,
enum pci_size_t size)
{
u32 addr, reg;
int ret;
ret = sh7751_pci_addr_valid(bdf, offset);
if (ret) {
*value = pci_get_ff(size);
return 0;
}
addr = get_bus_address(dev, bdf, offset);
p4_out(addr, SH7751_PCIPAR);
reg = p4_in(SH7751_PCIPDR);
*value = pci_conv_32_to_size(reg, offset, size);
return 0;
}
int pci_sh7751_init(struct pci_controller *hose)
static int sh7751_pci_write_config(struct udevice *dev, pci_dev_t bdf,
uint offset, ulong value,
enum pci_size_t size)
{
u32 addr, reg, old;
int ret;
ret = sh7751_pci_addr_valid(bdf, offset);
if (ret)
return ret;
addr = get_bus_address(dev, bdf, offset);
p4_out(addr, SH7751_PCIPAR);
old = p4_in(SH7751_PCIPDR);
reg = pci_conv_size_to_32(old, value, offset, size);
p4_out(reg, SH7751_PCIPDR);
return 0;
}
static int sh7751_pci_probe(struct udevice *dev)
{
/* Double-check that we're a 7751 or 7751R chip */
if (p4_in(SH7751_PCICONF0) != PCI_SH7751_ID
@ -178,7 +210,23 @@ int pci_sh7751_init(struct pci_controller *hose)
/* Finally, set central function init complete */
p4_out((SH7751_PCICR_PREFIX | SH7751_PCICR_CFIN), SH7751_PCICR);
pci_sh4_init(hose);
return 0;
}
static const struct dm_pci_ops sh7751_pci_ops = {
.read_config = sh7751_pci_read_config,
.write_config = sh7751_pci_write_config,
};
static const struct udevice_id sh7751_pci_ids[] = {
{ .compatible = "renesas,pci-sh7751" },
{ }
};
U_BOOT_DRIVER(sh7751_pci) = {
.name = "sh7751_pci",
.id = UCLASS_PCI,
.of_match = sh7751_pci_ids,
.ops = &sh7751_pci_ops,
.probe = sh7751_pci_probe,
};