Commit bb413337 authored by Ramon Fried's avatar Ramon Fried Committed by Tom Rini
Browse files

pci_ep: add pci endpoint sandbox driver



Add a dummy PCI endpoint for sandbox.
Supporting only a single function, it allows setting
and reading header configuration.
Signed-off-by: default avatarRamon Fried <ramon.fried@gmail.com>
Reviewed-by: Simon Glass's avatarSimon Glass <sjg@chromium.org>
parent c2ccc9e5
......@@ -90,6 +90,7 @@ config SANDBOX
select DM_SPI_FLASH
select HAVE_BLOCK_DEVICE
select LZO
select PCI_ENDPOINT
select SPI
select SUPPORT_OF_CONTROL
imply BITREVERSE
......@@ -120,6 +121,7 @@ config SANDBOX
imply VIRTIO_BLK
imply VIRTIO_NET
imply DM_SOUND
imply PCI_SANDBOX_EP
imply PCH
config SH
......
......@@ -487,6 +487,10 @@
};
};
pci_ep: pci_ep {
compatible = "sandbox,pci_ep";
};
probing {
compatible = "simple-bus";
test1 {
......
......@@ -22,4 +22,13 @@ config PCIE_CADENCE_EP
endpoint mode. This PCIe controller may be embedded into many
different vendors SoCs.
config PCI_SANDBOX_EP
bool "Sandbox PCIe endpoint controller"
depends on PCI_ENDPOINT
help
Say Y here if you want to support the Sandbox PCIe controller in
endpoint mode.
The sandbox driver act as a dummy driver which stores and
retrieves PCIe endpoint configuration as is.
endmenu
......@@ -5,3 +5,4 @@
obj-y += pci_ep-uclass.o
obj-$(CONFIG_PCIE_CADENCE_EP) += pcie-cadence-ep.o
obj-$(CONFIG_PCI_SANDBOX_EP) += sandbox-pci_ep.o
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2019 Ramon Fried <ramon.fried@gmail.com>
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <pci.h>
#include <pci_ep.h>
#include <asm/test.h>
/**
* struct sandbox_pci_ep_priv - private data for driver
* @hdr: Stores the EP device header
* @msix: required MSIx count;
* @msi: required MSI count;
*/
struct sandbox_pci_ep_priv {
struct pci_ep_header hdr;
struct pci_bar bars[6];
int msix;
int msi;
int irq_count;
};
/* Method exported for testing purposes */
int sandbox_get_pci_ep_irq_count(struct udevice *dev)
{
struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
return priv->irq_count;
}
static const struct udevice_id sandbox_pci_ep_ids[] = {
{ .compatible = "sandbox,pci_ep" },
{ }
};
static int sandbox_write_header(struct udevice *dev, uint fn,
struct pci_ep_header *hdr)
{
struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
if (fn > 0)
return -ENODEV;
memcpy(&priv->hdr, hdr, sizeof(*hdr));
return 0;
}
static int sandbox_read_header(struct udevice *dev, uint fn,
struct pci_ep_header *hdr)
{
struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
if (fn > 0)
return -ENODEV;
memcpy(hdr, &priv->hdr, sizeof(*hdr));
return 0;
}
static int sandbox_set_bar(struct udevice *dev, uint fn,
struct pci_bar *ep_bar)
{
struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
int bar_idx;
if (fn > 0)
return -ENODEV;
bar_idx = ep_bar->barno;
memcpy(&priv->bars[bar_idx], ep_bar, sizeof(*ep_bar));
return 0;
}
static int sandbox_read_bar(struct udevice *dev, uint fn,
struct pci_bar *ep_bar, enum pci_barno barno)
{
struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
int bar_idx;
if (fn > 0)
return -ENODEV;
bar_idx = ep_bar->barno;
memcpy(ep_bar, &priv->bars[bar_idx], sizeof(*ep_bar));
return 0;
}
static int sandbox_set_msi(struct udevice *dev, uint fn, uint interrupts)
{
struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
if (fn > 0)
return -ENODEV;
priv->msi = interrupts;
return 0;
}
static int sandbox_get_msi(struct udevice *dev, uint fn)
{
struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
if (fn > 0)
return -ENODEV;
return priv->msi;
}
static int sandbox_set_msix(struct udevice *dev, uint fn, uint interrupts)
{
struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
if (fn > 0)
return -ENODEV;
priv->msix = interrupts;
return 0;
}
static int sandbox_get_msix(struct udevice *dev, uint fn)
{
struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
if (fn > 0)
return -ENODEV;
return priv->msix;
}
static int sandbox_raise_irq(struct udevice *dev, uint fn,
enum pci_ep_irq_type type, uint interrupt_num)
{
struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
if (fn > 0)
return -ENODEV;
priv->irq_count++;
return 0;
}
static int sandbox_pci_ep_probe(struct udevice *dev)
{
struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
memset(priv, 0, sizeof(*priv));
return 0;
}
static struct pci_ep_ops sandbox_pci_ep_ops = {
.write_header = sandbox_write_header,
.read_header = sandbox_read_header,
.set_bar = sandbox_set_bar,
.read_bar = sandbox_read_bar,
.set_msi = sandbox_set_msi,
.get_msi = sandbox_get_msi,
.set_msix = sandbox_set_msix,
.get_msix = sandbox_get_msix,
.raise_irq = sandbox_raise_irq,
};
U_BOOT_DRIVER(pci_ep_sandbox) = {
.name = "pci_ep_sandbox",
.id = UCLASS_PCI_EP,
.of_match = sandbox_pci_ep_ids,
.probe = sandbox_pci_ep_probe,
.ops = &sandbox_pci_ep_ops,
.priv_auto_alloc_size = sizeof(struct sandbox_pci_ep_priv),
};
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