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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ccc3264c24
The very old commit 482982062f ("usb: gadget: renesas_usbhs:
bugfix: don't modify platform data") changed to use copied whole
structures values to fix the "hung-up" issue. However, we also
can fix the issue if the driver copies the get_vbus function
pointer to the driver's value.
So, this patch adds get_vbus member into struct usbhs_mod_info and
use the pointer instead of struct renesas_usbhs_platform_callback.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
180 lines
4.2 KiB
C
180 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-1.0+
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/*
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* Renesas USB driver
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*
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* Copyright (C) 2011 Renesas Solutions Corp.
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* Copyright (C) 2019 Renesas Electronics Corporation
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* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*/
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#ifndef RENESAS_USB_MOD_H
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#define RENESAS_USB_MOD_H
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#include <linux/spinlock.h>
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#include <linux/usb/renesas_usbhs.h>
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#include "common.h"
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/*
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* struct
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*/
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struct usbhs_irq_state {
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u16 intsts0;
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u16 intsts1;
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u16 brdysts;
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u16 nrdysts;
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u16 bempsts;
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};
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struct usbhs_mod {
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char *name;
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/*
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* entry point from common.c
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*/
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int (*start)(struct usbhs_priv *priv);
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int (*stop)(struct usbhs_priv *priv);
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/*
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* INTSTS0
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*/
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/* DVST (DVSQ) */
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int (*irq_dev_state)(struct usbhs_priv *priv,
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struct usbhs_irq_state *irq_state);
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/* CTRT (CTSQ) */
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int (*irq_ctrl_stage)(struct usbhs_priv *priv,
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struct usbhs_irq_state *irq_state);
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/* BEMP / BEMPSTS */
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int (*irq_empty)(struct usbhs_priv *priv,
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struct usbhs_irq_state *irq_state);
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u16 irq_bempsts;
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/* BRDY / BRDYSTS */
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int (*irq_ready)(struct usbhs_priv *priv,
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struct usbhs_irq_state *irq_state);
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u16 irq_brdysts;
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/*
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* INTSTS1
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*/
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/* ATTCHE */
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int (*irq_attch)(struct usbhs_priv *priv,
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struct usbhs_irq_state *irq_state);
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/* DTCHE */
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int (*irq_dtch)(struct usbhs_priv *priv,
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struct usbhs_irq_state *irq_state);
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/* SIGN */
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int (*irq_sign)(struct usbhs_priv *priv,
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struct usbhs_irq_state *irq_state);
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/* SACK */
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int (*irq_sack)(struct usbhs_priv *priv,
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struct usbhs_irq_state *irq_state);
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struct usbhs_priv *priv;
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};
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struct usbhs_mod_info {
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struct usbhs_mod *mod[USBHS_MAX];
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struct usbhs_mod *curt; /* current mod */
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/*
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* INTSTS0 :: VBINT
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*
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* This function will be used as autonomy mode (runtime_pwctrl == 0)
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* when the platform doesn't have own get_vbus function.
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*
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* This callback cannot be member of "struct usbhs_mod" because it
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* will be used even though host/gadget has not been selected.
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*/
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int (*irq_vbus)(struct usbhs_priv *priv,
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struct usbhs_irq_state *irq_state);
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/*
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* This function will be used on any gadget mode. To simplify the code,
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* this member is in here.
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*/
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int (*get_vbus)(struct platform_device *pdev);
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};
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/*
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* for host/gadget module
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*/
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struct usbhs_mod *usbhs_mod_get(struct usbhs_priv *priv, int id);
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struct usbhs_mod *usbhs_mod_get_current(struct usbhs_priv *priv);
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void usbhs_mod_register(struct usbhs_priv *priv, struct usbhs_mod *usb, int id);
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int usbhs_mod_is_host(struct usbhs_priv *priv);
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int usbhs_mod_change(struct usbhs_priv *priv, int id);
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int usbhs_mod_probe(struct usbhs_priv *priv);
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void usbhs_mod_remove(struct usbhs_priv *priv);
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void usbhs_mod_autonomy_mode(struct usbhs_priv *priv);
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void usbhs_mod_non_autonomy_mode(struct usbhs_priv *priv);
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/*
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* status functions
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*/
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int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state);
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int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state);
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/*
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* callback functions
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*/
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void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod);
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#define usbhs_mod_call(priv, func, param...) \
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({ \
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struct usbhs_mod *mod; \
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mod = usbhs_mod_get_current(priv); \
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!mod ? -ENODEV : \
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!mod->func ? 0 : \
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mod->func(param); \
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})
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#define usbhs_priv_to_modinfo(priv) (&priv->mod_info)
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#define usbhs_mod_info_call(priv, func, param...) \
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({ \
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struct usbhs_mod_info *info; \
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info = usbhs_priv_to_modinfo(priv); \
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!info->func ? 0 : \
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info->func(param); \
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})
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/*
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* host / gadget control
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*/
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#if defined(CONFIG_USB_RENESAS_USBHS_HCD) || \
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defined(CONFIG_USB_RENESAS_USBHS_HCD_MODULE)
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extern int usbhs_mod_host_probe(struct usbhs_priv *priv);
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extern int usbhs_mod_host_remove(struct usbhs_priv *priv);
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#else
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static inline int usbhs_mod_host_probe(struct usbhs_priv *priv)
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{
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return 0;
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}
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static inline void usbhs_mod_host_remove(struct usbhs_priv *priv)
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{
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}
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#endif
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#if defined(CONFIG_USB_RENESAS_USBHS_UDC) || \
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defined(CONFIG_USB_RENESAS_USBHS_UDC_MODULE)
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extern int usbhs_mod_gadget_probe(struct usbhs_priv *priv);
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extern void usbhs_mod_gadget_remove(struct usbhs_priv *priv);
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#else
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static inline int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
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{
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return 0;
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}
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static inline void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
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{
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}
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#endif
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#endif /* RENESAS_USB_MOD_H */
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