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pci: imx: Add DM and DT support

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Add DM support and support for probing the iMX PCI driver from DT.
The legacy non-DM support is retained, however shall be removed once
DM PCI is the only option remaining.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Marek Vasut 2019-06-09 03:50:55 +02:00 committed by Stefano Babic
parent d2cc2e86f8
commit a11c0f44b7
1 changed files with 105 additions and 6 deletions
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111
drivers/pci/pcie_imx.c
View file

@ -16,6 +16,7 @@
#include <asm/arch/crm_regs.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <dm.h>
#include <linux/sizes.h>
#include <errno.h>
#include <asm/arch/sys_proto.h>
@ -383,10 +384,9 @@ static void imx_pcie_fix_dabt_handler(bool set)
}
}
static int imx_pcie_read_config(struct pci_controller *hose, pci_dev_t d,
int where, u32 *val)
static int imx_pcie_read_cfg(struct imx_pcie_priv *priv, pci_dev_t d,
int where, u32 *val)
{
struct imx_pcie_priv *priv = hose->priv_data;
void __iomem *va_address;
int ret;
@ -413,10 +413,9 @@ static int imx_pcie_read_config(struct pci_controller *hose, pci_dev_t d,
return 0;
}
static int imx_pcie_write_config(struct pci_controller *hose, pci_dev_t d,
int where, u32 val)
static int imx_pcie_write_cfg(struct imx_pcie_priv *priv, pci_dev_t d,
int where, u32 val)
{
struct imx_pcie_priv *priv = hose->priv_data;
void __iomem *va_address = NULL;
int ret;
@ -668,6 +667,7 @@ static int imx_pcie_link_up(struct imx_pcie_priv *priv)
return 0;
}
#if !CONFIG_IS_ENABLED(DM_PCI)
static struct imx_pcie_priv imx_pcie_priv = {
.dbi_base = (void __iomem *)MX6_DBI_ADDR,
.cfg_base = (void __iomem *)MX6_ROOT_ADDR,
@ -675,6 +675,22 @@ static struct imx_pcie_priv imx_pcie_priv = {
static struct imx_pcie_priv *priv = &imx_pcie_priv;
static int imx_pcie_read_config(struct pci_controller *hose, pci_dev_t d,
int where, u32 *val)
{
struct imx_pcie_priv *priv = hose->priv_data;
return imx_pcie_read_cfg(priv, d, where, val);
}
static int imx_pcie_write_config(struct pci_controller *hose, pci_dev_t d,
int where, u32 val)
{
struct imx_pcie_priv *priv = hose->priv_data;
return imx_pcie_write_cfg(priv, d, where, val);
}
void imx_pcie_init(void)
{
/* Static instance of the controller. */
@ -730,3 +746,86 @@ void pci_init_board(void)
{
imx_pcie_init();
}
#else
static int imx_pcie_dm_read_config(struct udevice *dev, pci_dev_t bdf,
uint offset, ulong *value,
enum pci_size_t size)
{
struct imx_pcie_priv *priv = dev_get_priv(dev);
u32 tmpval;
int ret;
ret = imx_pcie_read_cfg(priv, bdf, offset, &tmpval);
if (ret)
return ret;
*value = pci_conv_32_to_size(tmpval, offset, size);
return 0;
}
static int imx_pcie_dm_write_config(struct udevice *dev, pci_dev_t bdf,
uint offset, ulong value,
enum pci_size_t size)
{
struct imx_pcie_priv *priv = dev_get_priv(dev);
u32 tmpval, newval;
int ret;
ret = imx_pcie_read_cfg(priv, bdf, offset, &tmpval);
if (ret)
return ret;
newval = pci_conv_size_to_32(tmpval, value, offset, size);
return imx_pcie_write_cfg(priv, bdf, offset, newval);
}
static int imx_pcie_dm_probe(struct udevice *dev)
{
struct imx_pcie_priv *priv = dev_get_priv(dev);
return imx_pcie_link_up(priv);
}
static int imx_pcie_dm_remove(struct udevice *dev)
{
struct imx_pcie_priv *priv = dev_get_priv(dev);
imx6_pcie_assert_core_reset(priv, true);
return 0;
}
static int imx_pcie_ofdata_to_platdata(struct udevice *dev)
{
struct imx_pcie_priv *priv = dev_get_priv(dev);
priv->dbi_base = (void __iomem *)devfdt_get_addr_index(dev, 0);
priv->cfg_base = (void __iomem *)devfdt_get_addr_index(dev, 1);
if (!priv->dbi_base || !priv->cfg_base)
return -EINVAL;
return 0;
}
static const struct dm_pci_ops imx_pcie_ops = {
.read_config = imx_pcie_dm_read_config,
.write_config = imx_pcie_dm_write_config,
};
static const struct udevice_id imx_pcie_ids[] = {
{ .compatible = "fsl,imx6q-pcie" },
{ }
};
U_BOOT_DRIVER(imx_pcie) = {
.name = "imx_pcie",
.id = UCLASS_PCI,
.of_match = imx_pcie_ids,
.ops = &imx_pcie_ops,
.probe = imx_pcie_dm_probe,
.remove = imx_pcie_dm_remove,
.ofdata_to_platdata = imx_pcie_ofdata_to_platdata,
.priv_auto_alloc_size = sizeof(struct imx_pcie_priv),
.flags = DM_FLAG_OS_PREPARE,
};
#endif