1 /* SPDX-License-Identifier: GPL-2.0 */
3 * ci.h - common structures, functions, and macros of the ChipIdea driver
5 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
10 #ifndef __DRIVERS_USB_CHIPIDEA_CI_H
11 #define __DRIVERS_USB_CHIPIDEA_CI_H
13 #include <linux/list.h>
14 #include <linux/irqreturn.h>
15 #include <linux/usb.h>
16 #include <linux/usb/gadget.h>
17 #include <linux/usb/otg-fsm.h>
18 #include <linux/usb/otg.h>
19 #include <linux/usb/role.h>
20 #include <linux/ulpi/interface.h>
22 /******************************************************************************
24 *****************************************************************************/
25 #define TD_PAGE_COUNT 5
26 #define CI_HDRC_PAGE_SIZE 4096ul /* page size for TD's */
28 #define CI_MAX_BUF_SIZE (TD_PAGE_COUNT * CI_HDRC_PAGE_SIZE)
30 /******************************************************************************
32 *****************************************************************************/
33 /* Identification Registers */
35 #define ID_HWGENERAL 0x4
37 #define ID_HWDEVICE 0xc
38 #define ID_HWTXBUF 0x10
39 #define ID_HWRXBUF 0x14
40 #define ID_SBUSCFG 0x90
42 /* register indices */
48 CAP_LAST = CAP_TESTMODE,
68 /* endptctrl1..15 follow */
69 OP_LAST = OP_ENDPTCTRL + ENDPT_MAX / 2,
72 /******************************************************************************
74 *****************************************************************************/
76 * struct ci_hw_ep - endpoint representation
77 * @ep: endpoint structure for gadget drivers
78 * @dir: endpoint direction (TX/RX)
79 * @num: endpoint number
80 * @type: endpoint type
81 * @name: string description of the endpoint
82 * @qh: queue head for this endpoint
83 * @wedge: is the endpoint wedged
84 * @ci: pointer to the controller
85 * @lock: pointer to controller's spinlock
86 * @td_pool: pointer to controller's TD pool
95 struct list_head queue;
101 /* global resources */
104 struct dma_pool *td_pool;
105 struct td_node *pending_td;
115 CI_REVISION_1X = 10, /* Revision 1.x */
116 CI_REVISION_20 = 20, /* Revision 2.0 */
117 CI_REVISION_21, /* Revision 2.1 */
118 CI_REVISION_22, /* Revision 2.2 */
119 CI_REVISION_23, /* Revision 2.3 */
120 CI_REVISION_24, /* Revision 2.4 */
121 CI_REVISION_25, /* Revision 2.5 */
122 CI_REVISION_25_PLUS, /* Revision above than 2.5 */
123 CI_REVISION_UNKNOWN = 99, /* Unknown Revision */
127 * struct ci_role_driver - host/gadget role driver
128 * @start: start this role
129 * @stop: stop this role
130 * @suspend: system suspend handler for this role
131 * @resume: system resume handler for this role
132 * @irq: irq handler for this role
133 * @name: role name string (host/gadget)
135 struct ci_role_driver {
136 int (*start)(struct ci_hdrc *);
137 void (*stop)(struct ci_hdrc *);
138 void (*suspend)(struct ci_hdrc *ci);
139 void (*resume)(struct ci_hdrc *ci, bool power_lost);
140 irqreturn_t (*irq)(struct ci_hdrc *);
145 * struct hw_bank - hardware register mapping representation
146 * @lpm: set if the device is LPM capable
147 * @phys: physical address of the controller's registers
148 * @abs: absolute address of the beginning of register window
149 * @cap: capability registers
150 * @op: operational registers
151 * @size: size of the register window
152 * @regmap: register lookup table
156 resource_size_t phys;
161 void __iomem *regmap[OP_LAST + 1];
165 * struct ci_hdrc - chipidea device representation
166 * @dev: pointer to parent device
167 * @lock: access synchronization
168 * @hw_bank: hardware register mapping
170 * @roles: array of supported roles for this controller
171 * @role: current role
172 * @is_otg: if the device is otg-capable
173 * @fsm: otg finite state machine
174 * @otg_fsm_hrtimer: hrtimer for otg fsm timers
175 * @hr_timeouts: time out list for active otg fsm timers
176 * @enabled_otg_timer_bits: bits of enabled otg timers
177 * @next_otg_timer: next nearest enabled timer to be expired
178 * @work: work for role changing
179 * @wq: workqueue thread
180 * @qh_pool: allocation pool for queue heads
181 * @td_pool: allocation pool for transfer descriptors
182 * @gadget: device side representation for peripheral controller
183 * @driver: gadget driver
184 * @resume_state: save the state of gadget suspend from
185 * @hw_ep_max: total number of endpoints supported by hardware
186 * @ci_hw_ep: array of endpoints
187 * @ep0_dir: ep0 direction
188 * @ep0out: pointer to ep0 OUT endpoint
189 * @ep0in: pointer to ep0 IN endpoint
190 * @status: ep0 status request
191 * @setaddr: if we should set the address on status completion
192 * @address: usb address received from the host
193 * @remote_wakeup: host-enabled remote wakeup
194 * @suspended: suspended by host
195 * @test_mode: the selected test mode
196 * @platdata: platform specific information supplied by parent device
197 * @vbus_active: is VBUS active
198 * @ulpi: pointer to ULPI device, if any
199 * @ulpi_ops: ULPI read/write ops for this device
200 * @phy: pointer to PHY, if any
201 * @usb_phy: pointer to USB PHY, if any and if using the USB PHY framework
202 * @hcd: pointer to usb_hcd for ehci host driver
203 * @id_event: indicates there is an id event, and handled at ci_otg_work
204 * @b_sess_valid_event: indicates there is a vbus event, and handled
206 * @imx28_write_fix: Freescale imx28 needs swp instruction for writing
207 * @supports_runtime_pm: if runtime pm is supported
208 * @in_lpm: if the core in low power mode
209 * @wakeup_int: if wakeup interrupt occur
210 * @rev: The revision number for controller
211 * @mutex: protect code from concorrent running when doing role switch
216 struct hw_bank hw_bank;
218 struct ci_role_driver *roles[CI_ROLE_END];
223 struct hrtimer otg_fsm_hrtimer;
224 ktime_t hr_timeouts[NUM_OTG_FSM_TIMERS];
225 unsigned enabled_otg_timer_bits;
226 enum otg_fsm_timer next_otg_timer;
227 struct usb_role_switch *role_switch;
228 struct work_struct work;
229 struct workqueue_struct *wq;
231 struct dma_pool *qh_pool;
232 struct dma_pool *td_pool;
234 struct usb_gadget gadget;
235 struct usb_gadget_driver *driver;
236 enum usb_device_state resume_state;
238 struct ci_hw_ep ci_hw_ep[ENDPT_MAX];
240 struct ci_hw_ep *ep0out, *ep0in;
242 struct usb_request *status;
249 struct ci_hdrc_platform_data *platdata;
252 struct ulpi_ops ulpi_ops;
254 /* old usb_phy interface */
255 struct usb_phy *usb_phy;
258 bool b_sess_valid_event;
259 bool imx28_write_fix;
260 bool supports_runtime_pm;
263 enum ci_revision rev;
267 static inline struct ci_role_driver *ci_role(struct ci_hdrc *ci)
269 BUG_ON(ci->role >= CI_ROLE_END || !ci->roles[ci->role]);
270 return ci->roles[ci->role];
273 static inline int ci_role_start(struct ci_hdrc *ci, enum ci_role role)
277 if (role >= CI_ROLE_END)
280 if (!ci->roles[role])
283 ret = ci->roles[role]->start(ci);
289 static inline void ci_role_stop(struct ci_hdrc *ci)
291 enum ci_role role = ci->role;
293 if (role == CI_ROLE_END)
296 ci->role = CI_ROLE_END;
298 ci->roles[role]->stop(ci);
301 static inline enum usb_role ci_role_to_usb_role(struct ci_hdrc *ci)
303 if (ci->role == CI_ROLE_HOST)
304 return USB_ROLE_HOST;
305 else if (ci->role == CI_ROLE_GADGET && ci->vbus_active)
306 return USB_ROLE_DEVICE;
308 return USB_ROLE_NONE;
311 static inline enum ci_role usb_role_to_ci_role(enum usb_role role)
313 if (role == USB_ROLE_HOST)
315 else if (role == USB_ROLE_DEVICE)
316 return CI_ROLE_GADGET;
322 * hw_read_id_reg: reads from a identification register
323 * @ci: the controller
324 * @offset: offset from the beginning of identification registers region
325 * @mask: bitfield mask
327 * This function returns register contents
329 static inline u32 hw_read_id_reg(struct ci_hdrc *ci, u32 offset, u32 mask)
331 return ioread32(ci->hw_bank.abs + offset) & mask;
335 * hw_write_id_reg: writes to a identification register
336 * @ci: the controller
337 * @offset: offset from the beginning of identification registers region
338 * @mask: bitfield mask
341 static inline void hw_write_id_reg(struct ci_hdrc *ci, u32 offset,
345 data = (ioread32(ci->hw_bank.abs + offset) & ~mask)
348 iowrite32(data, ci->hw_bank.abs + offset);
352 * hw_read: reads from a hw register
353 * @ci: the controller
354 * @reg: register index
355 * @mask: bitfield mask
357 * This function returns register contents
359 static inline u32 hw_read(struct ci_hdrc *ci, enum ci_hw_regs reg, u32 mask)
361 return ioread32(ci->hw_bank.regmap[reg]) & mask;
364 #ifdef CONFIG_SOC_IMX28
365 static inline void imx28_ci_writel(u32 val, volatile void __iomem *addr)
367 __asm__ ("swp %0, %0, [%1]" : : "r"(val), "r"(addr));
370 static inline void imx28_ci_writel(u32 val, volatile void __iomem *addr)
375 static inline void __hw_write(struct ci_hdrc *ci, u32 val,
378 if (ci->imx28_write_fix)
379 imx28_ci_writel(val, addr);
381 iowrite32(val, addr);
385 * hw_write: writes to a hw register
386 * @ci: the controller
387 * @reg: register index
388 * @mask: bitfield mask
391 static inline void hw_write(struct ci_hdrc *ci, enum ci_hw_regs reg,
395 data = (ioread32(ci->hw_bank.regmap[reg]) & ~mask)
398 __hw_write(ci, data, ci->hw_bank.regmap[reg]);
402 * hw_test_and_clear: tests & clears a hw register
403 * @ci: the controller
404 * @reg: register index
405 * @mask: bitfield mask
407 * This function returns register contents
409 static inline u32 hw_test_and_clear(struct ci_hdrc *ci, enum ci_hw_regs reg,
412 u32 val = ioread32(ci->hw_bank.regmap[reg]) & mask;
414 __hw_write(ci, val, ci->hw_bank.regmap[reg]);
419 * hw_test_and_write: tests & writes a hw register
420 * @ci: the controller
421 * @reg: register index
422 * @mask: bitfield mask
425 * This function returns register contents
427 static inline u32 hw_test_and_write(struct ci_hdrc *ci, enum ci_hw_regs reg,
430 u32 val = hw_read(ci, reg, ~0);
432 hw_write(ci, reg, mask, data);
433 return (val & mask) >> __ffs(mask);
437 * ci_otg_is_fsm_mode: runtime check if otg controller
438 * is in otg fsm mode.
440 * @ci: chipidea device
442 static inline bool ci_otg_is_fsm_mode(struct ci_hdrc *ci)
444 #ifdef CONFIG_USB_OTG_FSM
445 struct usb_otg_caps *otg_caps = &ci->platdata->ci_otg_caps;
447 return ci->is_otg && ci->roles[CI_ROLE_HOST] &&
448 ci->roles[CI_ROLE_GADGET] && (otg_caps->srp_support ||
449 otg_caps->hnp_support || otg_caps->adp_support);
455 int ci_ulpi_init(struct ci_hdrc *ci);
456 void ci_ulpi_exit(struct ci_hdrc *ci);
457 int ci_ulpi_resume(struct ci_hdrc *ci);
459 u32 hw_read_intr_enable(struct ci_hdrc *ci);
461 u32 hw_read_intr_status(struct ci_hdrc *ci);
463 int hw_device_reset(struct ci_hdrc *ci);
465 int hw_port_test_set(struct ci_hdrc *ci, u8 mode);
467 u8 hw_port_test_get(struct ci_hdrc *ci);
469 void hw_phymode_configure(struct ci_hdrc *ci);
471 void ci_platform_configure(struct ci_hdrc *ci);
473 void dbg_create_files(struct ci_hdrc *ci);
475 void dbg_remove_files(struct ci_hdrc *ci);
476 #endif /* __DRIVERS_USB_CHIPIDEA_CI_H */