2 * ci.h - common structures, functions, and macros of the ChipIdea driver
4 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #ifndef __DRIVERS_USB_CHIPIDEA_CI_H
14 #define __DRIVERS_USB_CHIPIDEA_CI_H
16 #include <linux/list.h>
17 #include <linux/irqreturn.h>
18 #include <linux/usb.h>
19 #include <linux/usb/gadget.h>
21 /******************************************************************************
23 *****************************************************************************/
24 #define TD_PAGE_COUNT 5
25 #define CI_HDRC_PAGE_SIZE 4096ul /* page size for TD's */
28 /******************************************************************************
30 *****************************************************************************/
32 * struct ci_hw_ep - endpoint representation
33 * @ep: endpoint structure for gadget drivers
34 * @dir: endpoint direction (TX/RX)
35 * @num: endpoint number
36 * @type: endpoint type
37 * @name: string description of the endpoint
38 * @qh: queue head for this endpoint
39 * @wedge: is the endpoint wedged
40 * @ci: pointer to the controller
41 * @lock: pointer to controller's spinlock
42 * @td_pool: pointer to controller's TD pool
51 struct list_head queue;
57 /* global resources */
60 struct dma_pool *td_pool;
61 struct td_node *pending_td;
71 * struct ci_role_driver - host/gadget role driver
72 * start: start this role
73 * stop: stop this role
74 * irq: irq handler for this role
75 * name: role name string (host/gadget)
77 struct ci_role_driver {
78 int (*start)(struct ci_hdrc *);
79 void (*stop)(struct ci_hdrc *);
80 irqreturn_t (*irq)(struct ci_hdrc *);
85 * struct hw_bank - hardware register mapping representation
86 * @lpm: set if the device is LPM capable
87 * @phys: physical address of the controller's registers
88 * @abs: absolute address of the beginning of register window
89 * @cap: capability registers
90 * @op: operational registers
91 * @size: size of the register window
92 * @regmap: register lookup table
101 void __iomem **regmap;
105 * struct ci_hdrc - chipidea device representation
106 * @dev: pointer to parent device
107 * @lock: access synchronization
108 * @hw_bank: hardware register mapping
110 * @roles: array of supported roles for this controller
111 * @role: current role
112 * @is_otg: if the device is otg-capable
113 * @work: work for role changing
114 * @wq: workqueue thread
115 * @qh_pool: allocation pool for queue heads
116 * @td_pool: allocation pool for transfer descriptors
117 * @gadget: device side representation for peripheral controller
118 * @driver: gadget driver
119 * @hw_ep_max: total number of endpoints supported by hardware
120 * @ci_hw_ep: array of endpoints
121 * @ep0_dir: ep0 direction
122 * @ep0out: pointer to ep0 OUT endpoint
123 * @ep0in: pointer to ep0 IN endpoint
124 * @status: ep0 status request
125 * @setaddr: if we should set the address on status completion
126 * @address: usb address received from the host
127 * @remote_wakeup: host-enabled remote wakeup
128 * @suspended: suspended by host
129 * @test_mode: the selected test mode
130 * @platdata: platform specific information supplied by parent device
131 * @vbus_active: is VBUS active
132 * @transceiver: pointer to USB PHY, if any
133 * @hcd: pointer to usb_hcd for ehci host driver
134 * @debugfs: root dentry for this controller in debugfs
139 struct hw_bank hw_bank;
141 struct ci_role_driver *roles[CI_ROLE_END];
144 struct work_struct work;
145 struct workqueue_struct *wq;
147 struct dma_pool *qh_pool;
148 struct dma_pool *td_pool;
150 struct usb_gadget gadget;
151 struct usb_gadget_driver *driver;
153 struct ci_hw_ep ci_hw_ep[ENDPT_MAX];
155 struct ci_hw_ep *ep0out, *ep0in;
157 struct usb_request *status;
164 struct ci_hdrc_platform_data *platdata;
166 /* FIXME: some day, we'll not use global phy */
168 struct usb_phy *transceiver;
170 struct dentry *debugfs;
173 static inline struct ci_role_driver *ci_role(struct ci_hdrc *ci)
175 BUG_ON(ci->role >= CI_ROLE_END || !ci->roles[ci->role]);
176 return ci->roles[ci->role];
179 static inline int ci_role_start(struct ci_hdrc *ci, enum ci_role role)
183 if (role >= CI_ROLE_END)
186 if (!ci->roles[role])
189 ret = ci->roles[role]->start(ci);
195 static inline void ci_role_stop(struct ci_hdrc *ci)
197 enum ci_role role = ci->role;
199 if (role == CI_ROLE_END)
202 ci->role = CI_ROLE_END;
204 ci->roles[role]->stop(ci);
207 /******************************************************************************
209 *****************************************************************************/
211 #define REG_BITS (32)
213 /* register indices */
219 CAP_LAST = CAP_TESTMODE,
235 /* endptctrl1..15 follow */
236 OP_LAST = OP_ENDPTCTRL + ENDPT_MAX / 2,
240 * hw_read: reads from a hw register
241 * @reg: register index
242 * @mask: bitfield mask
244 * This function returns register contents
246 static inline u32 hw_read(struct ci_hdrc *ci, enum ci_hw_regs reg, u32 mask)
248 return ioread32(ci->hw_bank.regmap[reg]) & mask;
252 * hw_write: writes to a hw register
253 * @reg: register index
254 * @mask: bitfield mask
257 static inline void hw_write(struct ci_hdrc *ci, enum ci_hw_regs reg,
261 data = (ioread32(ci->hw_bank.regmap[reg]) & ~mask)
264 iowrite32(data, ci->hw_bank.regmap[reg]);
268 * hw_test_and_clear: tests & clears a hw register
269 * @reg: register index
270 * @mask: bitfield mask
272 * This function returns register contents
274 static inline u32 hw_test_and_clear(struct ci_hdrc *ci, enum ci_hw_regs reg,
277 u32 val = ioread32(ci->hw_bank.regmap[reg]) & mask;
279 iowrite32(val, ci->hw_bank.regmap[reg]);
284 * hw_test_and_write: tests & writes a hw register
285 * @reg: register index
286 * @mask: bitfield mask
289 * This function returns register contents
291 static inline u32 hw_test_and_write(struct ci_hdrc *ci, enum ci_hw_regs reg,
294 u32 val = hw_read(ci, reg, ~0);
296 hw_write(ci, reg, mask, data);
297 return (val & mask) >> __ffs(mask);
300 int hw_device_reset(struct ci_hdrc *ci, u32 mode);
302 int hw_port_test_set(struct ci_hdrc *ci, u8 mode);
304 u8 hw_port_test_get(struct ci_hdrc *ci);
306 #endif /* __DRIVERS_USB_CHIPIDEA_CI_H */