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usb: cdnsp: fixed issue with incorrect detecting CDNSP family controllers

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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@vger.kernel.org
Fixes: 3d82904559 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver")
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Link: https://lore.kernel.org/r/20240215121609.259772-1-pawell@cadence.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pawel Laszczak 2024-02-15 13:16:09 +01:00 committed by Greg Kroah-Hartman
parent 18a6be6743
commit 47625b018c
3 changed files with 14 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/usb/cdns3/core.c
View File

@ -395,7 +395,6 @@ pm_put:
return ret;
}
/**
* cdns_wakeup_irq - interrupt handler for wakeup events
* @irq: irq number for cdns3/cdnsp core device

13
drivers/usb/cdns3/drd.c
View File

@ -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)
{

6
drivers/usb/cdns3/drd.h
View File

@ -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.