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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b002ff6e26
Current renesas_usbhs was designed to save power when USB is not connected. And it assumed platform uses callback to notify connection/disconnection by external interrupt. But some SuperH / platform board doesn't have such feature. This patch adds autonomy mode which detect USB connection/disconnection by internal interrupt. But power will be always ON when autonomy mode is selected. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
/*
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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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* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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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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u16 dvstctr;
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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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/* INTSTS0 :: 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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/* INTSTS0 :: 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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/* INTSTS0 :: BEMP */
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/* 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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/* INTSTS0 :: BRDY */
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/* 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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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
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* when platform cannot call notify_hotplug.
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*
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* This callback cannot be member of "struct usbhs_mod"
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* because it will be used even though
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* 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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/*
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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, struct usbhs_mod *mod);
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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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/*
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* status functions
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*/
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int usbhs_status_get_usb_speed(struct usbhs_irq_state *irq_state);
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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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/*
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* gadget control
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*/
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#ifdef CONFIG_USB_RENESAS_USBHS_UDC
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extern int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv);
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extern void __devexit 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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