Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-04 04:06:26 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

xhci-pci: Make xhci-pci-renesas a proper modular driver

Browse Source 
If CONFIG_USB_XHCI_PCI_RENESAS is enabled, xhci-pci conditionally
calls into the xhci-pci-renesas module, which means both modules must
be loaded to use any xHCI PCI controller.

The MODULE_FIRMWARE declaration in the base xhci-pci module causes
initramfs-tools to check for and warn about missing firmware for the
Renesas xHCI controllers, when any xHCI PCI controller is present.
And because of the previous oddity, simply moving this declaration to
xhci-pci-renesas wouldn't help.

To fix this, reverse the relationship between the modules:

- Remove the quirk for the Renesas xHCIs, and the driver_data
  structure used only for them
- In xhci-pci:
  - Rename xhci_pci_probe() to xhci_pci_common_probe()
  - Export xhci_pci_common_probe() and xhci_pci_remove()
  - Use a new probe function that rejects the Renesas xHCIs and then
    calls the common probe function
- In xhci-pci-renesas:
  - Stop exporting renesas_xhci_check_request_fw()
  - Add a probe function that calls renesas_xhci_check_request_fw()
    followed by xhci_pci_common_probe()
  - Add and register a new pci_driver matching only the Renesas xHCIs
    and using its own probe function, but with other operations the
    same as in xhci-pci
- Make CONFIG_USB_XHCI_PCI_RENESAS depend on CONFIG_USB_XHCI_PCI,
  not the other way around

Finally, move the MODULE_FIRMWARE declaration to xhci-pci-renesas.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Tested-by: Cyril Brulebois <cyril@debamax.com>
Link: https://lore.kernel.org/r/ZqqfXYRJf7kGaqus@decadent.org.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ben Hutchings 2024-07-31 22:32:29 +02:00 committed by Greg Kroah-Hartman
parent f358602425
commit 25f51b76f9
5 changed files with 64 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/host/Kconfig
View File

@ -40,11 +40,11 @@ config USB_XHCI_DBGCAP
config USB_XHCI_PCI
tristate
depends on USB_PCI
depends on USB_XHCI_PCI_RENESAS || !USB_XHCI_PCI_RENESAS
default y
config USB_XHCI_PCI_RENESAS
tristate "Support for additional Renesas xHCI controller with firmware"
depends on USB_XHCI_PCI
help
Say 'Y' to enable the support for the Renesas xHCI controller with
firmware. Make sure you have the firmware for the device and

48
drivers/usb/host/xhci-pci-renesas.c
View File

@ -50,6 +50,8 @@
#define RENESAS_RETRY 10000
#define RENESAS_DELAY 10
#define RENESAS_FW_NAME "renesas_usb_fw.mem"
static int renesas_fw_download_image(struct pci_dev *dev,
const u32 *fw, size_t step, bool rom)
{
@ -573,12 +575,10 @@ static int renesas_load_fw(struct pci_dev *pdev, const struct firmware *fw)
return err;
}
int renesas_xhci_check_request_fw(struct pci_dev *pdev,
const struct pci_device_id *id)
static int renesas_xhci_check_request_fw(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct xhci_driver_data *driver_data =
(struct xhci_driver_data *)id->driver_data;
const char *fw_name = driver_data->firmware;
const char fw_name[] = RENESAS_FW_NAME;
const struct firmware *fw;
bool has_rom;
int err;
@ -625,7 +625,41 @@ int renesas_xhci_check_request_fw(struct pci_dev *pdev,
release_firmware(fw);
return err;
}
EXPORT_SYMBOL_GPL(renesas_xhci_check_request_fw);
MODULE_DESCRIPTION("Support for Renesas xHCI controller with firmware");
static int
xhci_pci_renesas_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
int retval;
retval = renesas_xhci_check_request_fw(dev, id);
if (retval)
return retval;
return xhci_pci_common_probe(dev, id);
}
static const struct pci_device_id pci_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_RENESAS, 0x0014) },
{ PCI_DEVICE(PCI_VENDOR_ID_RENESAS, 0x0015) },
{ /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, pci_ids);
static struct pci_driver xhci_renesas_pci_driver = {
.name = "xhci-pci-renesas",
.id_table = pci_ids,
.probe = xhci_pci_renesas_probe,
.remove = xhci_pci_remove,
.shutdown = usb_hcd_pci_shutdown,
.driver = {
.pm = pm_ptr(&usb_hcd_pci_pm_ops),
},
};
module_pci_driver(xhci_renesas_pci_driver);
MODULE_DESCRIPTION("Renesas xHCI PCI Host Controller Driver");
MODULE_FIRMWARE(RENESAS_FW_NAME);
MODULE_IMPORT_NS(xhci);
MODULE_LICENSE("GPL v2");

57
drivers/usb/host/xhci-pci.c
View File

@ -235,15 +235,6 @@ static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct xhci_driver_data *driver_data;
const struct pci_device_id *id;
id = pci_match_id(to_pci_driver(pdev->dev.driver)->id_table, pdev);
if (id && id->driver_data) {
driver_data = (struct xhci_driver_data *)id->driver_data;
xhci->quirks |= driver_data->quirks;
}
/* Look for vendor-specific quirks */
if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
@ -572,21 +563,13 @@ static int xhci_pci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hd
* We need to register our own PCI probe function (instead of the USB core's
* function) in order to create a second roothub under xHCI.
*/
static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
int xhci_pci_common_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
int retval;
struct xhci_hcd *xhci;
struct usb_hcd *hcd;
struct xhci_driver_data *driver_data;
struct reset_control *reset;
driver_data = (struct xhci_driver_data *)id->driver_data;
if (driver_data && driver_data->quirks & XHCI_RENESAS_FW_QUIRK) {
retval = renesas_xhci_check_request_fw(dev, id);
if (retval)
return retval;
}
reset = devm_reset_control_get_optional_exclusive(&dev->dev, NULL);
if (IS_ERR(reset))
return PTR_ERR(reset);
@ -651,8 +634,24 @@ static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
pm_runtime_put_noidle(&dev->dev);
return retval;
}
EXPORT_SYMBOL_NS_GPL(xhci_pci_common_probe, xhci);
static void xhci_pci_remove(struct pci_dev *dev)
static const struct pci_device_id pci_ids_reject[] = {
/* handled by xhci-pci-renesas */
{ PCI_DEVICE(PCI_VENDOR_ID_RENESAS, 0x0014) },
{ PCI_DEVICE(PCI_VENDOR_ID_RENESAS, 0x0015) },
{ /* end: all zeroes */ }
};
static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
if (pci_match_id(pci_ids_reject, dev))
return -ENODEV;
return xhci_pci_common_probe(dev, id);
}
void xhci_pci_remove(struct pci_dev *dev)
{
struct xhci_hcd *xhci;
@ -675,6 +674,7 @@ static void xhci_pci_remove(struct pci_dev *dev)
usb_hcd_pci_remove(dev);
}
EXPORT_SYMBOL_NS_GPL(xhci_pci_remove, xhci);
/*
* In some Intel xHCI controllers, in order to get D3 working,
@ -882,19 +882,8 @@ static void xhci_pci_shutdown(struct usb_hcd *hcd)
/*-------------------------------------------------------------------------*/
static const struct xhci_driver_data reneses_data = {
.quirks = XHCI_RENESAS_FW_QUIRK,
.firmware = "renesas_usb_fw.mem",
};
/* PCI driver selection metadata; PCI hotplugging uses this */
static const struct pci_device_id pci_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_RENESAS, 0x0014),
.driver_data = (unsigned long)&reneses_data,
},
{ PCI_DEVICE(PCI_VENDOR_ID_RENESAS, 0x0015),
.driver_data = (unsigned long)&reneses_data,
},
/* handle any USB 3.0 xHCI controller */
{ PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
},
@ -902,14 +891,6 @@ static const struct pci_device_id pci_ids[] = {
};
MODULE_DEVICE_TABLE(pci, pci_ids);
/*
* Without CONFIG_USB_XHCI_PCI_RENESAS renesas_xhci_check_request_fw() won't
* load firmware, so don't encumber the xhci-pci driver with it.
*/
#if IS_ENABLED(CONFIG_USB_XHCI_PCI_RENESAS)
MODULE_FIRMWARE("renesas_usb_fw.mem");
#endif
/* pci driver glue; this is a "new style" PCI driver module */
static struct pci_driver xhci_pci_driver = {
.name = hcd_name,

19
drivers/usb/host/xhci-pci.h
View File

@ -4,22 +4,7 @@
#ifndef XHCI_PCI_H
#define XHCI_PCI_H
#if IS_ENABLED(CONFIG_USB_XHCI_PCI_RENESAS)
int renesas_xhci_check_request_fw(struct pci_dev *dev,
const struct pci_device_id *id);
#else
static int renesas_xhci_check_request_fw(struct pci_dev *dev,
const struct pci_device_id *id)
{
return 0;
}
#endif
struct xhci_driver_data {
u64 quirks;
const char *firmware;
};
int xhci_pci_common_probe(struct pci_dev *dev, const struct pci_device_id *id);
void xhci_pci_remove(struct pci_dev *dev);
#endif

2
drivers/usb/host/xhci.h
View File

@ -1616,7 +1616,7 @@ struct xhci_hcd {
#define XHCI_DEFAULT_PM_RUNTIME_ALLOW BIT_ULL(33)
#define XHCI_RESET_PLL_ON_DISCONNECT BIT_ULL(34)
#define XHCI_SNPS_BROKEN_SUSPEND BIT_ULL(35)
#define XHCI_RENESAS_FW_QUIRK BIT_ULL(36)
/* Reserved. It was XHCI_RENESAS_FW_QUIRK */
#define XHCI_SKIP_PHY_INIT BIT_ULL(37)
#define XHCI_DISABLE_SPARSE BIT_ULL(38)
#define XHCI_SG_TRB_CACHE_SIZE_QUIRK BIT_ULL(39)