linux-dev/drivers/phy/phy-sun4i-usb.c, branch linus/master

phy: Group vendor specific phy drivers

2017-06-01T09:58:33Z

Adding vendor specific directories in phy to group phy drivers under their respective vendor umbrella. Also updated the MAINTAINERS file to reflect the correct directory structure for phy drivers. Signed-off-by: Vivek Gautam Acked-by: Heiko Stuebner Acked-by: Viresh Kumar Acked-by: Krzysztof Kozlowski Acked-by: Yoshihiro Shimoda Reviewed-by: Jaehoon Chung Cc: Kishon Vijay Abraham I Cc: David S. Miller Cc: Geert Uytterhoeven Cc: Yoshihiro Shimoda Cc: Guenter Roeck Cc: Heiko Stuebner Cc: Viresh Kumar Cc: Maxime Ripard Cc: Chen-Yu Tsai Cc: Sylwester Nawrocki Cc: Krzysztof Kozlowski Cc: Jaehoon Chung Cc: Stephen Boyd Cc: Martin Blumenstingl Cc: linux-arm-kernel@lists.infradead.org Cc: linux-arm-msm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-omap@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org Cc: linux-rockchip@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org Cc: linux-usb@vger.kernel.org Signed-off-by: Kishon Vijay Abraham I

phy: sun4i-usb: enable PHY0 dual route switching for A64 USB PHY

2017-04-10T11:13:40Z

Allwinner A64 SoC features a switchable PHY0 like the one in H3, which can switch between a MUSB controller and a pair of OHCI/EHCI controller. Enable PHY0 route auto switching for A64. Signed-off-by: Icenowy Zheng Acked-by: Maxime Ripard Signed-off-by: Kishon Vijay Abraham I

phy: sun4i-usb: support automatically switch PHY0 route to MUSB/HCI

2017-04-10T11:12:58Z

On newer Allwinner SoCs (H3 and after), the PHY0 node is routed to both MUSB controller for peripheral and host support (the host support is slightly broken), and a pair of EHCI/OHCI controllers, which provide a better support for host mode. Add support for automatically switch the route of PHY0 according to the status of dr_mode and id det pin. Only H3 have this function enabled in this patch, as further SoCs will be tested later and then have it enabled. As H5 is reusing the PHY driver of H3, this function is also enabled. Signed-off-by: Icenowy Zheng Acked-by: Chen-Yu Tsai Signed-off-by: Kishon Vijay Abraham I

phy: sun4i-usb: add PHYCTL offset for H3 SoC

2017-04-10T11:12:57Z

The config structure of H3 in phy-sun4i-usb driver have the PHYCTL register offset missing. Add it. From the BSP source code, we know that the offset should be 0x10. Signed-off-by: Icenowy Zheng Signed-off-by: Kishon Vijay Abraham I

phy: sun4i-usb: change PHYCTL register clearing code

2017-04-10T11:12:57Z

It seems that all SoCs with the PHYCTL register offset as 0x10 need the PHYCTL register to be cleared before it's written. Change PHYCTL register clearing code to judge whether clearing is needed based on the PHYCTL offset. Signed-off-by: Icenowy Zheng Signed-off-by: Kishon Vijay Abraham I

phy: sun4i-usb: Replace the deprecated extcon API

2017-01-16T11:11:51Z

This patch replaces the deprecated extcon API as following: - extcon_set_cable_state_() -> extcon_set_state_sync() Cc: Kishon Vijay Abraham I Cc: Maxime Ripard Cc: Chen-Yu Tsai Acked-by: Chen-Yu Tsai Signed-off-by: Chanwoo Choi Signed-off-by: Kishon Vijay Abraham I

phy: sun4i-usb: add support for V3s USB PHY

2017-01-16T11:11:51Z

Allwinner V3s come with a USB PHY controller slightly different to other SoCs, with only one PHY. Add support for it. Signed-off-by: Icenowy Zheng Acked-by: Maxime Ripard Signed-off-by: Kishon Vijay Abraham I

phy_sun4i_usb: set_mode: Allow using set_mode to force end the current session

2016-11-18T12:49:16Z

The sunxi musb has a bug where sometimes it will generate a babble error on device disconnect instead of a disconnect irq. When this happens the musb-controller switches from host mode to device mode (it clears MUSB_DEVCTL_SESSION and sets MUSB_DEVCTL_BDEVICE) and gets stuck in this state. Clearing this requires reporting Vbus low for 200 or more ms, but on some devices Vbus is simply always high (host-only mode, no Vbus control). This commit modifies sun4i_usb_phy_set_mode so that it will force end the current session when called with the current mode, before this commit calling set_mode with the current mode was a nop since id_det would stay the same resulting in the detect_work not doing anything. This allows the sunxi-musb glue to use sun4i_usb_phy_set_mode to force end the current session without changing the mode, to fixup the stuck state after a babble error. Signed-off-by: Hans de Goede Signed-off-by: Kishon Vijay Abraham I

phy: sun4i: check PMU presence when poking unknown bit of pmu

2016-11-05T08:15:02Z

Allwinner SoC's PHY 0, when used as OTG controller, have no pmu part. The code that poke some unknown bit of PMU for H3/A64 didn't check the PHY, and will cause kernel oops when PHY 0 is used. This patch will check whether the pmu is not NULL before poking. Fixes: b3e0d141ca9f (phy: sun4i: add support for A64 usb phy) Signed-off-by: Icenowy Zheng Acked-by: Maxime Ripard Reviewed-by: Hans de Goede Signed-off-by: Kishon Vijay Abraham I

phy: sun4i-usb: Use spinlock to guard phyctl register access

2016-09-10T12:13:38Z

The musb driver calls into this phy driver to disable/enable squelch detection. This function was introduced in 24fe86a617c5 ("phy: sun4i-usb: Add a sunxi specific function for setting squelch-detect"). This function in turn calls sun4i_usb_phy_write, which uses a mutex to guard the common access register. Unfortunately musb does this in atomic context, which results in the following warning with lock debugging enabled: BUG: sleeping function called from invalid context at kernel/locking/mutex.c:97 in_atomic(): 1, irqs_disabled(): 128, pid: 96, name: kworker/0:2 CPU: 0 PID: 96 Comm: kworker/0:2 Not tainted 4.8.0-rc4-00181-gd502f8ad1c3e #13 Hardware name: Allwinner sun8i Family Workqueue: events musb_deassert_reset [] (unwind_backtrace) from [] (show_stack+0xb/0xc) [] (show_stack) from [] (dump_stack+0x67/0x74) [] (dump_stack) from [] (mutex_lock+0x15/0x2c) [] (mutex_lock) from [] (sun4i_usb_phy_write+0x39/0xec) [] (sun4i_usb_phy_write) from [] (musb_port_reset+0xfb/0x184) [] (musb_port_reset) from [] (musb_deassert_reset+0x1f/0x2c) [] (musb_deassert_reset) from [] (process_one_work+0x129/0x2b8) [] (process_one_work) from [] (worker_thread+0xf3/0x424) [] (worker_thread) from [] (kthread+0xa1/0xb8) [] (kthread) from [] (ret_from_fork+0x11/0x20) Since the register access is mmio, we can use a spinlock to guard this specific access, rather than the mutex that guards the entire phy. Fixes: ba4bdc9e1dc0 ("PHY: sunxi: Add driver for sunxi usb phy") Cc: Hans de Goede Cc: stable@vger.kernel.org Signed-off-by: Chen-Yu Tsai Reviewed-by: Hans de Goede Signed-off-by: Kishon Vijay Abraham I