diff options
| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2021-07-15 12:07:54 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-27 16:58:37 +0300 |
| commit | 0609c1aa10de07b8828cac88bf26140ec1a56a51 (patch) | |
| tree | 2034ac6a947d34c5395f8b82c940c0700485cd9e /drivers/usb/mtu3/mtu3_host.c | |
| parent | d7e127242816e06981840880eead898197a3257b (diff) | |
| download | linux-0609c1aa10de07b8828cac88bf26140ec1a56a51.tar.xz | |
usb: mtu3: add new helpers for host suspend/resume
Extract two helpers for host suspend and resume, will make it easy
to support dual-role mode suspend/resume later.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1626340078-29111-10-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/mtu3/mtu3_host.c')
| -rw-r--r-- | drivers/usb/mtu3/mtu3_host.c | 92 |
1 files changed, 82 insertions, 10 deletions
diff --git a/drivers/usb/mtu3/mtu3_host.c b/drivers/usb/mtu3/mtu3_host.c index 6185bac5fecf..a0a6a181b752 100644 --- a/drivers/usb/mtu3/mtu3_host.c +++ b/drivers/usb/mtu3/mtu3_host.c @@ -126,7 +126,7 @@ static void host_ports_num_get(struct ssusb_mtk *ssusb) } /* only configure ports will be used later */ -int ssusb_host_enable(struct ssusb_mtk *ssusb) +static int ssusb_host_enable(struct ssusb_mtk *ssusb) { void __iomem *ibase = ssusb->ippc_base; int num_u3p = ssusb->u3_ports; @@ -171,13 +171,12 @@ int ssusb_host_enable(struct ssusb_mtk *ssusb) return ssusb_check_clocks(ssusb, check_clk); } -int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend) +static int ssusb_host_disable(struct ssusb_mtk *ssusb) { void __iomem *ibase = ssusb->ippc_base; int num_u3p = ssusb->u3_ports; int num_u2p = ssusb->u2_ports; u32 value; - int ret; int i; /* power down and disable u3 ports except skipped ones */ @@ -186,8 +185,7 @@ int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend) continue; value = mtu3_readl(ibase, SSUSB_U3_CTRL(i)); - value |= SSUSB_U3_PORT_PDN; - value |= suspend ? 0 : SSUSB_U3_PORT_DIS; + value |= SSUSB_U3_PORT_PDN | SSUSB_U3_PORT_DIS; mtu3_writel(ibase, SSUSB_U3_CTRL(i), value); } @@ -197,16 +195,90 @@ int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend) continue; value = mtu3_readl(ibase, SSUSB_U2_CTRL(i)); - value |= SSUSB_U2_PORT_PDN; - value |= suspend ? 0 : SSUSB_U2_PORT_DIS; + value |= SSUSB_U2_PORT_PDN | SSUSB_U2_PORT_DIS; mtu3_writel(ibase, SSUSB_U2_CTRL(i), value); } /* power down host ip */ mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL1, SSUSB_IP_HOST_PDN); - if (!suspend) - return 0; + return 0; +} + +int ssusb_host_resume(struct ssusb_mtk *ssusb, bool p0_skipped) +{ + void __iomem *ibase = ssusb->ippc_base; + int u3p_skip_msk = ssusb->u3p_dis_msk; + int u2p_skip_msk = ssusb->u2p_dis_msk; + int num_u3p = ssusb->u3_ports; + int num_u2p = ssusb->u2_ports; + u32 value; + int i; + + if (p0_skipped) { + u2p_skip_msk |= 0x1; + if (ssusb->otg_switch.is_u3_drd) + u3p_skip_msk |= 0x1; + } + + /* power on host ip */ + mtu3_clrbits(ibase, U3D_SSUSB_IP_PW_CTRL1, SSUSB_IP_HOST_PDN); + + /* power on u3 ports except skipped ones */ + for (i = 0; i < num_u3p; i++) { + if ((0x1 << i) & u3p_skip_msk) + continue; + + value = mtu3_readl(ibase, SSUSB_U3_CTRL(i)); + value &= ~SSUSB_U3_PORT_PDN; + mtu3_writel(ibase, SSUSB_U3_CTRL(i), value); + } + + /* power on all u2 ports except skipped ones */ + for (i = 0; i < num_u2p; i++) { + if ((0x1 << i) & u2p_skip_msk) + continue; + + value = mtu3_readl(ibase, SSUSB_U2_CTRL(i)); + value &= ~SSUSB_U2_PORT_PDN; + mtu3_writel(ibase, SSUSB_U2_CTRL(i), value); + } + + return 0; +} + +/* here not skip port0 due to PDN can be set repeatedly */ +int ssusb_host_suspend(struct ssusb_mtk *ssusb) +{ + void __iomem *ibase = ssusb->ippc_base; + int num_u3p = ssusb->u3_ports; + int num_u2p = ssusb->u2_ports; + u32 value; + int ret; + int i; + + /* power down u3 ports except skipped ones */ + for (i = 0; i < num_u3p; i++) { + if ((0x1 << i) & ssusb->u3p_dis_msk) + continue; + + value = mtu3_readl(ibase, SSUSB_U3_CTRL(i)); + value |= SSUSB_U3_PORT_PDN; + mtu3_writel(ibase, SSUSB_U3_CTRL(i), value); + } + + /* power down u2 ports except skipped ones */ + for (i = 0; i < num_u2p; i++) { + if ((0x1 << i) & ssusb->u2p_dis_msk) + continue; + + value = mtu3_readl(ibase, SSUSB_U2_CTRL(i)); + value |= SSUSB_U2_PORT_PDN; + mtu3_writel(ibase, SSUSB_U2_CTRL(i), value); + } + + /* power down host ip */ + mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL1, SSUSB_IP_HOST_PDN); /* wait for host ip to sleep */ ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS1, value, @@ -237,7 +309,7 @@ static void ssusb_host_cleanup(struct ssusb_mtk *ssusb) if (ssusb->is_host) ssusb_set_vbus(&ssusb->otg_switch, 0); - ssusb_host_disable(ssusb, false); + ssusb_host_disable(ssusb); } /* |