This is a note to let you know that I've just added the patch titled
usb: cdnsp: fixed issue with incorrect detecting CDNSP family controllers
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-cdnsp-fixed-issue-with-incorrect-detecting-cdnsp-family-controllers.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 47625b018c6bc788bc10dd654c82696eb0a5ef11 Mon Sep 17 00:00:00 2001
From: Pawel Laszczak <pawell@xxxxxxxxxxx>
Date: Thu, 15 Feb 2024 13:16:09 +0100
Subject: usb: cdnsp: fixed issue with incorrect detecting CDNSP family controllers
From: Pawel Laszczak <pawell@xxxxxxxxxxx>
commit 47625b018c6bc788bc10dd654c82696eb0a5ef11 upstream.
Cadence have several controllers from 0x000403xx family but current
driver suuport detecting only one with DID equal 0x0004034E.
It causes that if someone uses different CDNSP controller then driver
will use incorrect version and register space.
Patch fix this issue.
cc: stable@xxxxxxxxxxxxxxx
Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver")
Signed-off-by: Pawel Laszczak <pawell@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240215121609.259772-1-pawell@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/cdns3/core.c | 1 -
drivers/usb/cdns3/drd.c | 13 +++++++++----
drivers/usb/cdns3/drd.h | 6 +++++-
3 files changed, 14 insertions(+), 6 deletions(-)
--- a/drivers/usb/cdns3/core.c
+++ b/drivers/usb/cdns3/core.c
@@ -395,7 +395,6 @@ pm_put:
return ret;
}
-
/**
* cdns_wakeup_irq - interrupt handler for wakeup events
* @irq: irq number for cdns3/cdnsp core device
--- a/drivers/usb/cdns3/drd.c
+++ b/drivers/usb/cdns3/drd.c
@@ -156,7 +156,8 @@ bool cdns_is_device(struct cdns *cdns)
*/
static void cdns_otg_disable_irq(struct cdns *cdns)
{
- writel(0, &cdns->otg_irq_regs->ien);
+ if (cdns->version)
+ writel(0, &cdns->otg_irq_regs->ien);
}
/**
@@ -422,15 +423,20 @@ int cdns_drd_init(struct cdns *cdns)
cdns->otg_regs = (void __iomem *)&cdns->otg_v1_regs->cmd;
- if (readl(&cdns->otg_cdnsp_regs->did) == OTG_CDNSP_DID) {
+ state = readl(&cdns->otg_cdnsp_regs->did);
+
+ if (OTG_CDNSP_CHECK_DID(state)) {
cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem *)
&cdns->otg_cdnsp_regs->ien;
cdns->version = CDNSP_CONTROLLER_V2;
- } else {
+ } else if (OTG_CDNS3_CHECK_DID(state)) {
cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem *)
&cdns->otg_v1_regs->ien;
writel(1, &cdns->otg_v1_regs->simulate);
cdns->version = CDNS3_CONTROLLER_V1;
+ } else {
+ dev_err(cdns->dev, "not supporte DID=0x%08x\n", state);
+ return -EINVAL;
}
dev_dbg(cdns->dev, "DRD version v1 (ID: %08x, rev: %08x)\n",
@@ -483,7 +489,6 @@ int cdns_drd_exit(struct cdns *cdns)
return 0;
}
-
/* Indicate the cdns3 core was power lost before */
bool cdns_power_is_lost(struct cdns *cdns)
{
--- a/drivers/usb/cdns3/drd.h
+++ b/drivers/usb/cdns3/drd.h
@@ -79,7 +79,11 @@ struct cdnsp_otg_regs {
__le32 susp_timing_ctrl;
};
-#define OTG_CDNSP_DID 0x0004034E
+/* CDNSP driver supports 0x000403xx Cadence USB controller family. */
+#define OTG_CDNSP_CHECK_DID(did) (((did) & GENMASK(31, 8)) == 0x00040300)
+
+/* CDNS3 driver supports 0x000402xx Cadence USB controller family. */
+#define OTG_CDNS3_CHECK_DID(did) (((did) & GENMASK(31, 8)) == 0x00040200)
/*
* Common registers interface for both CDNS3 and CDNSP version of DRD.
Patches currently in stable-queue which might be from pawell@xxxxxxxxxxx are
queue-6.6/usb-cdnsp-fixed-issue-with-incorrect-detecting-cdnsp-family-controllers.patch
queue-6.6/usb-cdnsp-blocked-some-cdns3-specific-code.patch
