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usb: USB keyboard not recognized at low probability [1/1]

Browse Source 
PD#TV-4365

Problem:
USB keyboard not recognized after reboot repeatedly.

Solution:
Reset the reset_FS_LS_Clock_Divider bit of the usb phy.

Verify:
tl1

Change-Id: I0f4bf35be04d3aff1094bf55641348ccaca072e4
Signed-off-by: he.he <he.he@amlogic.com>
This commit is contained in:
he.he
2019-04-22 18:05:47 +08:00
committed by Luan Yuan
parent 1f46fb8efc
commit 707bf79822
3 changed files with 42 additions and 0 deletions
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38
drivers/amlogic/usb/phy/phy-aml-new-usb2-v2.c
View File

@@ -92,6 +92,44 @@ void set_usb_phy_device_tuning(int port, int default_val)
g_phy2_v2->phy_cfg_state[port] = default_val;
}
void set_usb_phy_host_low_reset(int port)
{
void __iomem *phy_reg_base;
u32 val;
if (!g_phy2_v2)
return;
if (port > g_phy2_v2->portnum)
return;
if (g_phy2_v2->phy_version) {
phy_reg_base = g_phy2_v2->phy_cfg[port];
val = readl(phy_reg_base);
val &= (~(1 << 14));
writel(val, phy_reg_base);
val = readl(phy_reg_base + 0x08);
val &= 0xfff;
writel(val | readl(phy_reg_base + 0x10), phy_reg_base + 0x10);
writel(g_phy2_v2->pll_setting[5], phy_reg_base + 0x34);
val = readl(phy_reg_base);
val |= (1 << 14);
writel(val, phy_reg_base);
writel(g_phy2_v2->pll_setting[5], phy_reg_base + 0x34);
} else {
phy_reg_base = g_phy2_v2->phy_cfg[port];
val = readl(phy_reg_base);
val &= (~(1 << 12));
writel(val, phy_reg_base);
writel(g_phy2_v2->pll_setting[5], phy_reg_base + 0x34);
val |= (1 << 12);
writel(val, phy_reg_base);
writel(g_phy2_v2->pll_setting[5], phy_reg_base + 0x34);
}
}
void set_usb_pll(struct amlogic_usb_v2 *phy, void __iomem *reg)
{
/* TO DO set usb PLL */

3
drivers/usb/host/xhci-hub.c
View File

@@ -555,6 +555,9 @@ static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
if (DEV_HIGHSPEED(port_status) &&
(wValue == USB_PORT_FEAT_C_RESET))
set_usb_phy_host_tuning(wIndex, 0);
if (DEV_LOWSPEED(port_status) &&
(wValue == USB_PORT_FEAT_C_RESET))
set_usb_phy_host_low_reset(wIndex);
#endif
}

1
drivers/usb/host/xhci.h
View File

@@ -2013,6 +2013,7 @@ int xhci_test_single_step(struct xhci_hcd *xhci, gfp_t mem_flags,
struct urb *urb, int slot_id,
unsigned int ep_index, int testflag);
extern void set_usb_phy_host_tuning(int port, int default_val);
extern void set_usb_phy_host_low_reset(int port);
#endif
#endif /* __LINUX_XHCI_HCD_H */