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path: root/drivers/usb/cdns3
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Diffstat (limited to 'drivers/usb/cdns3')
-rw-r--r--drivers/usb/cdns3/cdns3-plat.c2
-rw-r--r--drivers/usb/cdns3/cdnsp-gadget.c52
-rw-r--r--drivers/usb/cdns3/cdnsp-gadget.h10
-rw-r--r--drivers/usb/cdns3/cdnsp-pci.c12
-rw-r--r--drivers/usb/cdns3/cdnsp-ring.c3
-rw-r--r--drivers/usb/cdns3/core.h3
6 files changed, 75 insertions, 7 deletions
diff --git a/drivers/usb/cdns3/cdns3-plat.c b/drivers/usb/cdns3/cdns3-plat.c
index 59ec505e198a..735df88774e4 100644
--- a/drivers/usb/cdns3/cdns3-plat.c
+++ b/drivers/usb/cdns3/cdns3-plat.c
@@ -179,8 +179,6 @@ err_phy3_init:
/**
* cdns3_plat_remove() - unbind drd driver and clean up
* @pdev: Pointer to Linux platform device
- *
- * Returns 0 on success otherwise negative errno
*/
static void cdns3_plat_remove(struct platform_device *pdev)
{
diff --git a/drivers/usb/cdns3/cdnsp-gadget.c b/drivers/usb/cdns3/cdnsp-gadget.c
index 87f310841735..55f95f41b3b4 100644
--- a/drivers/usb/cdns3/cdnsp-gadget.c
+++ b/drivers/usb/cdns3/cdnsp-gadget.c
@@ -29,7 +29,8 @@
unsigned int cdnsp_port_speed(unsigned int port_status)
{
/*Detect gadget speed based on PORTSC register*/
- if (DEV_SUPERSPEEDPLUS(port_status))
+ if (DEV_SUPERSPEEDPLUS(port_status) ||
+ DEV_SSP_GEN1x2(port_status) || DEV_SSP_GEN2x2(port_status))
return USB_SPEED_SUPER_PLUS;
else if (DEV_SUPERSPEED(port_status))
return USB_SPEED_SUPER;
@@ -139,6 +140,26 @@ static void cdnsp_clear_port_change_bit(struct cdnsp_device *pdev,
(portsc & PORT_CHANGE_BITS), port_regs);
}
+static void cdnsp_set_apb_timeout_value(struct cdnsp_device *pdev)
+{
+ struct cdns *cdns = dev_get_drvdata(pdev->dev);
+ __le32 __iomem *reg;
+ void __iomem *base;
+ u32 offset = 0;
+ u32 val;
+
+ if (!cdns->override_apb_timeout)
+ return;
+
+ base = &pdev->cap_regs->hc_capbase;
+ offset = cdnsp_find_next_ext_cap(base, offset, D_XEC_PRE_REGS_CAP);
+ reg = base + offset + REG_CHICKEN_BITS_3_OFFSET;
+
+ val = le32_to_cpu(readl(reg));
+ val = CHICKEN_APB_TIMEOUT_SET(val, cdns->override_apb_timeout);
+ writel(cpu_to_le32(val), reg);
+}
+
static void cdnsp_set_chicken_bits_2(struct cdnsp_device *pdev, u32 bit)
{
__le32 __iomem *reg;
@@ -527,6 +548,7 @@ int cdnsp_wait_for_cmd_compl(struct cdnsp_device *pdev)
dma_addr_t cmd_deq_dma;
union cdnsp_trb *event;
u32 cycle_state;
+ u32 retry = 10;
int ret, val;
u64 cmd_dma;
u32 flags;
@@ -558,8 +580,23 @@ int cdnsp_wait_for_cmd_compl(struct cdnsp_device *pdev)
flags = le32_to_cpu(event->event_cmd.flags);
/* Check the owner of the TRB. */
- if ((flags & TRB_CYCLE) != cycle_state)
+ if ((flags & TRB_CYCLE) != cycle_state) {
+ /*
+ * Give some extra time to get chance controller
+ * to finish command before returning error code.
+ * Checking CMD_RING_BUSY is not sufficient because
+ * this bit is cleared to '0' when the Command
+ * Descriptor has been executed by controller
+ * and not when command completion event has
+ * be added to event ring.
+ */
+ if (retry--) {
+ udelay(20);
+ continue;
+ }
+
return -EINVAL;
+ }
cmd_dma = le64_to_cpu(event->event_cmd.cmd_trb);
@@ -1773,6 +1810,8 @@ static void cdnsp_get_rev_cap(struct cdnsp_device *pdev)
reg += cdnsp_find_next_ext_cap(reg, 0, RTL_REV_CAP);
pdev->rev_cap = reg;
+ pdev->rtl_revision = readl(&pdev->rev_cap->rtl_revision);
+
dev_info(pdev->dev, "Rev: %08x/%08x, eps: %08x, buff: %08x/%08x\n",
readl(&pdev->rev_cap->ctrl_revision),
readl(&pdev->rev_cap->rtl_revision),
@@ -1798,6 +1837,15 @@ static int cdnsp_gen_setup(struct cdnsp_device *pdev)
pdev->hci_version = HC_VERSION(pdev->hcc_params);
pdev->hcc_params = readl(&pdev->cap_regs->hcc_params);
+ /*
+ * Override the APB timeout value to give the controller more time for
+ * enabling UTMI clock and synchronizing APB and UTMI clock domains.
+ * This fix is platform specific and is required to fixes issue with
+ * reading incorrect value from PORTSC register after resuming
+ * from L1 state.
+ */
+ cdnsp_set_apb_timeout_value(pdev);
+
cdnsp_get_rev_cap(pdev);
/* Make sure the Device Controller is halted. */
diff --git a/drivers/usb/cdns3/cdnsp-gadget.h b/drivers/usb/cdns3/cdnsp-gadget.h
index 84887dfea763..2afa3e558f85 100644
--- a/drivers/usb/cdns3/cdnsp-gadget.h
+++ b/drivers/usb/cdns3/cdnsp-gadget.h
@@ -285,11 +285,15 @@ struct cdnsp_port_regs {
#define XDEV_HS (0x3 << 10)
#define XDEV_SS (0x4 << 10)
#define XDEV_SSP (0x5 << 10)
+#define XDEV_SSP1x2 (0x6 << 10)
+#define XDEV_SSP2x2 (0x7 << 10)
#define DEV_UNDEFSPEED(p) (((p) & DEV_SPEED_MASK) == (0x0 << 10))
#define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_FS)
#define DEV_HIGHSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_HS)
#define DEV_SUPERSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_SS)
#define DEV_SUPERSPEEDPLUS(p) (((p) & DEV_SPEED_MASK) == XDEV_SSP)
+#define DEV_SSP_GEN1x2(p) (((p) & DEV_SPEED_MASK) == XDEV_SSP1x2)
+#define DEV_SSP_GEN2x2(p) (((p) & DEV_SPEED_MASK) == XDEV_SSP2x2)
#define DEV_SUPERSPEED_ANY(p) (((p) & DEV_SPEED_MASK) >= XDEV_SS)
#define DEV_PORT_SPEED(p) (((p) >> 10) & 0x0f)
/* Port Link State Write Strobe - set this when changing link state */
@@ -520,6 +524,9 @@ struct cdnsp_rev_cap {
#define REG_CHICKEN_BITS_2_OFFSET 0x48
#define CHICKEN_XDMA_2_TP_CACHE_DIS BIT(28)
+#define REG_CHICKEN_BITS_3_OFFSET 0x4C
+#define CHICKEN_APB_TIMEOUT_SET(p, val) (((p) & ~GENMASK(21, 0)) | (val))
+
/* XBUF Extended Capability ID. */
#define XBUF_CAP_ID 0xCB
#define XBUF_RX_TAG_MASK_0_OFFSET 0x1C
@@ -1357,6 +1364,7 @@ struct cdnsp_port {
* @rev_cap: Controller Capabilities Registers.
* @hcs_params1: Cached register copies of read-only HCSPARAMS1
* @hcc_params: Cached register copies of read-only HCCPARAMS1
+ * @rtl_revision: Cached controller rtl revision.
* @setup: Temporary buffer for setup packet.
* @ep0_preq: Internal allocated request used during enumeration.
* @ep0_stage: ep0 stage during enumeration process.
@@ -1411,6 +1419,8 @@ struct cdnsp_device {
__u32 hcs_params1;
__u32 hcs_params3;
__u32 hcc_params;
+ #define RTL_REVISION_NEW_LPM 0x2700
+ __u32 rtl_revision;
/* Lock used in interrupt thread context. */
spinlock_t lock;
struct usb_ctrlrequest setup;
diff --git a/drivers/usb/cdns3/cdnsp-pci.c b/drivers/usb/cdns3/cdnsp-pci.c
index a51144504ff3..8c361b8394e9 100644
--- a/drivers/usb/cdns3/cdnsp-pci.c
+++ b/drivers/usb/cdns3/cdnsp-pci.c
@@ -28,6 +28,8 @@
#define PCI_DRIVER_NAME "cdns-pci-usbssp"
#define PLAT_DRIVER_NAME "cdns-usbssp"
+#define CHICKEN_APB_TIMEOUT_VALUE 0x1C20
+
static struct pci_dev *cdnsp_get_second_fun(struct pci_dev *pdev)
{
/*
@@ -139,6 +141,14 @@ static int cdnsp_pci_probe(struct pci_dev *pdev,
cdnsp->otg_irq = pdev->irq;
}
+ /*
+ * Cadence PCI based platform require some longer timeout for APB
+ * to fixes domain clock synchronization issue after resuming
+ * controller from L1 state.
+ */
+ cdnsp->override_apb_timeout = CHICKEN_APB_TIMEOUT_VALUE;
+ pci_set_drvdata(pdev, cdnsp);
+
if (pci_is_enabled(func)) {
cdnsp->dev = dev;
cdnsp->gadget_init = cdnsp_gadget_init;
@@ -148,8 +158,6 @@ static int cdnsp_pci_probe(struct pci_dev *pdev,
goto free_cdnsp;
}
- pci_set_drvdata(pdev, cdnsp);
-
device_wakeup_enable(&pdev->dev);
if (pci_dev_run_wake(pdev))
pm_runtime_put_noidle(&pdev->dev);
diff --git a/drivers/usb/cdns3/cdnsp-ring.c b/drivers/usb/cdns3/cdnsp-ring.c
index 46852529499d..fd06cb85c4ea 100644
--- a/drivers/usb/cdns3/cdnsp-ring.c
+++ b/drivers/usb/cdns3/cdnsp-ring.c
@@ -308,7 +308,8 @@ static bool cdnsp_ring_ep_doorbell(struct cdnsp_device *pdev,
writel(db_value, reg_addr);
- cdnsp_force_l0_go(pdev);
+ if (pdev->rtl_revision < RTL_REVISION_NEW_LPM)
+ cdnsp_force_l0_go(pdev);
/* Doorbell was set. */
return true;
diff --git a/drivers/usb/cdns3/core.h b/drivers/usb/cdns3/core.h
index 921cccf1ca9d..801be9e61340 100644
--- a/drivers/usb/cdns3/core.h
+++ b/drivers/usb/cdns3/core.h
@@ -79,6 +79,8 @@ struct cdns3_platform_data {
* @pdata: platform data from glue layer
* @lock: spinlock structure
* @xhci_plat_data: xhci private data structure pointer
+ * @override_apb_timeout: hold value of APB timeout. For value 0 the default
+ * value in CHICKEN_BITS_3 will be preserved.
* @gadget_init: pointer to gadget initialization function
*/
struct cdns {
@@ -117,6 +119,7 @@ struct cdns {
struct cdns3_platform_data *pdata;
spinlock_t lock;
struct xhci_plat_priv *xhci_plat_data;
+ u32 override_apb_timeout;
int (*gadget_init)(struct cdns *cdns);
};
generated by cgit (git 2.34.1) at 2025-06-07 04:05:49 +0000