/* * ci.h - common structures, functions, and macros of the ChipIdea driver * * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved. * * Author: David Lopo * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef __DRIVERS_USB_CHIPIDEA_CI_H #define __DRIVERS_USB_CHIPIDEA_CI_H #include #include #include #include /****************************************************************************** * DEFINE *****************************************************************************/ #define TD_PAGE_COUNT 5 #define CI13XXX_PAGE_SIZE 4096ul /* page size for TD's */ #define ENDPT_MAX 32 /****************************************************************************** * STRUCTURES *****************************************************************************/ /** * struct ci13xxx_ep - endpoint representation * @ep: endpoint structure for gadget drivers * @dir: endpoint direction (TX/RX) * @num: endpoint number * @type: endpoint type * @name: string description of the endpoint * @qh: queue head for this endpoint * @wedge: is the endpoint wedged * @ci: pointer to the controller * @lock: pointer to controller's spinlock * @td_pool: pointer to controller's TD pool */ struct ci13xxx_ep { struct usb_ep ep; u8 dir; u8 num; u8 type; char name[16]; struct { struct list_head queue; struct ci13xxx_qh *ptr; dma_addr_t dma; } qh; int wedge; /* global resources */ struct ci13xxx *ci; spinlock_t *lock; struct dma_pool *td_pool; }; enum ci_role { CI_ROLE_HOST = 0, CI_ROLE_GADGET, CI_ROLE_END, }; /** * struct ci_role_driver - host/gadget role driver * start: start this role * stop: stop this role * irq: irq handler for this role * name: role name string (host/gadget) */ struct ci_role_driver { int (*start)(struct ci13xxx *); void (*stop)(struct ci13xxx *); irqreturn_t (*irq)(struct ci13xxx *); const char *name; }; /** * struct hw_bank - hardware register mapping representation * @lpm: set if the device is LPM capable * @phys: physical address of the controller's registers * @abs: absolute address of the beginning of register window * @cap: capability registers * @op: operational registers * @size: size of the register window * @regmap: register lookup table */ struct hw_bank { unsigned lpm; resource_size_t phys; void __iomem *abs; void __iomem *cap; void __iomem *op; size_t size; void __iomem **regmap; }; /** * struct ci13xxx - chipidea device representation * @dev: pointer to parent device * @lock: access synchronization * @hw_bank: hardware register mapping * @irq: IRQ number * @roles: array of supported roles for this controller * @role: current role * @is_otg: if the device is otg-capable * @work: work for role changing * @wq: workqueue thread * @qh_pool: allocation pool for queue heads * @td_pool: allocation pool for transfer descriptors * @gadget: device side representation for peripheral controller * @driver: gadget driver * @hw_ep_max: total number of endpoints supported by hardware * @ci13xxx_ep: array of endpoints * @ep0_dir: ep0 direction * @ep0out: pointer to ep0 OUT endpoint * @ep0in: pointer to ep0 IN endpoint * @status: ep0 status request * @setaddr: if we should set the address on status completion * @address: usb address received from the host * @remote_wakeup: host-enabled remote wakeup * @suspended: suspended by host * @test_mode: the selected test mode * @platdata: platform specific information supplied by parent device * @vbus_active: is VBUS active * @transceiver: pointer to USB PHY, if any * @hcd: pointer to usb_hcd for ehci host driver * @debugfs: root dentry for this controller in debugfs */ struct ci13xxx { struct device *dev; spinlock_t lock; struct hw_bank hw_bank; int irq; struct ci_role_driver *roles[CI_ROLE_END]; enum ci_role role; bool is_otg; struct work_struct work; struct workqueue_struct *wq; struct dma_pool *qh_pool; struct dma_pool *td_pool; struct usb_gadget gadget; struct usb_gadget_driver *driver; unsigned hw_ep_max; struct ci13xxx_ep ci13xxx_ep[ENDPT_MAX]; u32 ep0_dir; struct ci13xxx_ep *ep0out, *ep0in; struct usb_request *status; bool setaddr; u8 address; u8 remote_wakeup; u8 suspended; u8 test_mode; struct ci13xxx_platform_data *platdata; int vbus_active; /* FIXME: some day, we'll not use global phy */ bool global_phy; struct usb_phy *transceiver; struct usb_hcd *hcd; struct dentry *debugfs; }; static inline struct ci_role_driver *ci_role(struct ci13xxx *ci) { BUG_ON(ci->role >= CI_ROLE_END || !ci->roles[ci->role]); return ci->roles[ci->role]; } static inline int ci_role_start(struct ci13xxx *ci, enum ci_role role) { int ret; if (role >= CI_ROLE_END) return -EINVAL; if (!ci->roles[role]) return -ENXIO; ret = ci->roles[role]->start(ci); if (!ret) ci->role = role; return ret; } static inline void ci_role_stop(struct ci13xxx *ci) { enum ci_role role = ci->role; if (role == CI_ROLE_END) return; ci->role = CI_ROLE_END; ci->roles[role]->stop(ci); } /****************************************************************************** * REGISTERS *****************************************************************************/ /* register size */ #define REG_BITS (32) /* register indices */ enum ci13xxx_regs { CAP_CAPLENGTH, CAP_HCCPARAMS, CAP_DCCPARAMS, CAP_TESTMODE, CAP_LAST = CAP_TESTMODE, OP_USBCMD, OP_USBSTS, OP_USBINTR, OP_DEVICEADDR, OP_ENDPTLISTADDR, OP_PORTSC, OP_DEVLC, OP_OTGSC, OP_USBMODE, OP_ENDPTSETUPSTAT, OP_ENDPTPRIME, OP_ENDPTFLUSH, OP_ENDPTSTAT, OP_ENDPTCOMPLETE, OP_ENDPTCTRL, /* endptctrl1..15 follow */ OP_LAST = OP_ENDPTCTRL + ENDPT_MAX / 2, }; /** * hw_read: reads from a hw register * @reg: register index * @mask: bitfield mask * * This function returns register contents */ static inline u32 hw_read(struct ci13xxx *ci, enum ci13xxx_regs reg, u32 mask) { return ioread32(ci->hw_bank.regmap[reg]) & mask; } /** * hw_write: writes to a hw register * @reg: register index * @mask: bitfield mask * @data: new value */ static inline void hw_write(struct ci13xxx *ci, enum ci13xxx_regs reg, u32 mask, u32 data) { if (~mask) data = (ioread32(ci->hw_bank.regmap[reg]) & ~mask) | (data & mask); iowrite32(data, ci->hw_bank.regmap[reg]); } /** * hw_test_and_clear: tests & clears a hw register * @reg: register index * @mask: bitfield mask * * This function returns register contents */ static inline u32 hw_test_and_clear(struct ci13xxx *ci, enum ci13xxx_regs reg, u32 mask) { u32 val = ioread32(ci->hw_bank.regmap[reg]) & mask; iowrite32(val, ci->hw_bank.regmap[reg]); return val; } /** * hw_test_and_write: tests & writes a hw register * @reg: register index * @mask: bitfield mask * @data: new value * * This function returns register contents */ static inline u32 hw_test_and_write(struct ci13xxx *ci, enum ci13xxx_regs reg, u32 mask, u32 data) { u32 val = hw_read(ci, reg, ~0); hw_write(ci, reg, mask, data); return (val & mask) >> __ffs(mask); } int hw_device_reset(struct ci13xxx *ci, u32 mode); int hw_port_test_set(struct ci13xxx *ci, u8 mode); u8 hw_port_test_get(struct ci13xxx *ci); #endif /* __DRIVERS_USB_CHIPIDEA_CI_H */