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Commit | Line | Data |
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e443b333 AS |
1 | /* |
2 | * ci.h - common structures, functions, and macros of the ChipIdea driver | |
3 | * | |
4 | * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved. | |
5 | * | |
6 | * Author: David Lopo | |
7 | * | |
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. | |
11 | */ | |
12 | ||
13 | #ifndef __DRIVERS_USB_CHIPIDEA_CI_H | |
14 | #define __DRIVERS_USB_CHIPIDEA_CI_H | |
15 | ||
16 | #include <linux/list.h> | |
5f36e231 | 17 | #include <linux/irqreturn.h> |
eb70e5ab | 18 | #include <linux/usb.h> |
e443b333 | 19 | #include <linux/usb/gadget.h> |
57677be5 | 20 | #include <linux/usb/otg-fsm.h> |
e443b333 AS |
21 | |
22 | /****************************************************************************** | |
23 | * DEFINE | |
24 | *****************************************************************************/ | |
b983e51a | 25 | #define TD_PAGE_COUNT 5 |
8e22978c | 26 | #define CI_HDRC_PAGE_SIZE 4096ul /* page size for TD's */ |
e443b333 AS |
27 | #define ENDPT_MAX 32 |
28 | ||
21395a1a MKB |
29 | /****************************************************************************** |
30 | * REGISTERS | |
31 | *****************************************************************************/ | |
655d32e9 PC |
32 | /* Identification Registers */ |
33 | #define ID_ID 0x0 | |
34 | #define ID_HWGENERAL 0x4 | |
35 | #define ID_HWHOST 0x8 | |
36 | #define ID_HWDEVICE 0xc | |
37 | #define ID_HWTXBUF 0x10 | |
38 | #define ID_HWRXBUF 0x14 | |
39 | #define ID_SBUSCFG 0x90 | |
40 | ||
21395a1a MKB |
41 | /* register indices */ |
42 | enum ci_hw_regs { | |
43 | CAP_CAPLENGTH, | |
44 | CAP_HCCPARAMS, | |
45 | CAP_DCCPARAMS, | |
46 | CAP_TESTMODE, | |
47 | CAP_LAST = CAP_TESTMODE, | |
48 | OP_USBCMD, | |
49 | OP_USBSTS, | |
50 | OP_USBINTR, | |
51 | OP_DEVICEADDR, | |
52 | OP_ENDPTLISTADDR, | |
28362673 | 53 | OP_TTCTRL, |
96625ead | 54 | OP_BURSTSIZE, |
21395a1a MKB |
55 | OP_PORTSC, |
56 | OP_DEVLC, | |
57 | OP_OTGSC, | |
58 | OP_USBMODE, | |
59 | OP_ENDPTSETUPSTAT, | |
60 | OP_ENDPTPRIME, | |
61 | OP_ENDPTFLUSH, | |
62 | OP_ENDPTSTAT, | |
63 | OP_ENDPTCOMPLETE, | |
64 | OP_ENDPTCTRL, | |
65 | /* endptctrl1..15 follow */ | |
66 | OP_LAST = OP_ENDPTCTRL + ENDPT_MAX / 2, | |
67 | }; | |
68 | ||
e443b333 AS |
69 | /****************************************************************************** |
70 | * STRUCTURES | |
71 | *****************************************************************************/ | |
551a8ac6 | 72 | /** |
8e22978c | 73 | * struct ci_hw_ep - endpoint representation |
551a8ac6 AS |
74 | * @ep: endpoint structure for gadget drivers |
75 | * @dir: endpoint direction (TX/RX) | |
76 | * @num: endpoint number | |
77 | * @type: endpoint type | |
78 | * @name: string description of the endpoint | |
79 | * @qh: queue head for this endpoint | |
80 | * @wedge: is the endpoint wedged | |
26c696c6 | 81 | * @ci: pointer to the controller |
551a8ac6 | 82 | * @lock: pointer to controller's spinlock |
551a8ac6 AS |
83 | * @td_pool: pointer to controller's TD pool |
84 | */ | |
8e22978c | 85 | struct ci_hw_ep { |
551a8ac6 AS |
86 | struct usb_ep ep; |
87 | u8 dir; | |
88 | u8 num; | |
89 | u8 type; | |
90 | char name[16]; | |
e443b333 | 91 | struct { |
551a8ac6 | 92 | struct list_head queue; |
8e22978c | 93 | struct ci_hw_qh *ptr; |
551a8ac6 AS |
94 | dma_addr_t dma; |
95 | } qh; | |
96 | int wedge; | |
e443b333 AS |
97 | |
98 | /* global resources */ | |
8e22978c | 99 | struct ci_hdrc *ci; |
551a8ac6 | 100 | spinlock_t *lock; |
551a8ac6 | 101 | struct dma_pool *td_pool; |
2e270412 | 102 | struct td_node *pending_td; |
e443b333 AS |
103 | }; |
104 | ||
5f36e231 AS |
105 | enum ci_role { |
106 | CI_ROLE_HOST = 0, | |
107 | CI_ROLE_GADGET, | |
108 | CI_ROLE_END, | |
109 | }; | |
110 | ||
cb271f3c PC |
111 | enum ci_revision { |
112 | CI_REVISION_1X = 10, /* Revision 1.x */ | |
113 | CI_REVISION_20 = 20, /* Revision 2.0 */ | |
114 | CI_REVISION_21, /* Revision 2.1 */ | |
115 | CI_REVISION_22, /* Revision 2.2 */ | |
116 | CI_REVISION_23, /* Revision 2.3 */ | |
117 | CI_REVISION_24, /* Revision 2.4 */ | |
118 | CI_REVISION_25, /* Revision 2.5 */ | |
119 | CI_REVISION_25_PLUS, /* Revision above than 2.5 */ | |
120 | CI_REVISION_UNKNOWN = 99, /* Unknown Revision */ | |
121 | }; | |
122 | ||
5f36e231 AS |
123 | /** |
124 | * struct ci_role_driver - host/gadget role driver | |
19353881 PC |
125 | * @start: start this role |
126 | * @stop: stop this role | |
127 | * @irq: irq handler for this role | |
128 | * @name: role name string (host/gadget) | |
5f36e231 AS |
129 | */ |
130 | struct ci_role_driver { | |
8e22978c AS |
131 | int (*start)(struct ci_hdrc *); |
132 | void (*stop)(struct ci_hdrc *); | |
133 | irqreturn_t (*irq)(struct ci_hdrc *); | |
5f36e231 AS |
134 | const char *name; |
135 | }; | |
136 | ||
551a8ac6 AS |
137 | /** |
138 | * struct hw_bank - hardware register mapping representation | |
139 | * @lpm: set if the device is LPM capable | |
eb70e5ab | 140 | * @phys: physical address of the controller's registers |
551a8ac6 AS |
141 | * @abs: absolute address of the beginning of register window |
142 | * @cap: capability registers | |
143 | * @op: operational registers | |
144 | * @size: size of the register window | |
145 | * @regmap: register lookup table | |
146 | */ | |
e443b333 | 147 | struct hw_bank { |
551a8ac6 | 148 | unsigned lpm; |
eb70e5ab | 149 | resource_size_t phys; |
551a8ac6 AS |
150 | void __iomem *abs; |
151 | void __iomem *cap; | |
152 | void __iomem *op; | |
153 | size_t size; | |
21395a1a | 154 | void __iomem *regmap[OP_LAST + 1]; |
e443b333 AS |
155 | }; |
156 | ||
551a8ac6 | 157 | /** |
8e22978c | 158 | * struct ci_hdrc - chipidea device representation |
551a8ac6 AS |
159 | * @dev: pointer to parent device |
160 | * @lock: access synchronization | |
161 | * @hw_bank: hardware register mapping | |
162 | * @irq: IRQ number | |
163 | * @roles: array of supported roles for this controller | |
164 | * @role: current role | |
165 | * @is_otg: if the device is otg-capable | |
57677be5 | 166 | * @fsm: otg finite state machine |
3a316ec4 LJ |
167 | * @otg_fsm_hrtimer: hrtimer for otg fsm timers |
168 | * @hr_timeouts: time out list for active otg fsm timers | |
169 | * @enabled_otg_timer_bits: bits of enabled otg timers | |
170 | * @next_otg_timer: next nearest enabled timer to be expired | |
551a8ac6 AS |
171 | * @work: work for role changing |
172 | * @wq: workqueue thread | |
173 | * @qh_pool: allocation pool for queue heads | |
174 | * @td_pool: allocation pool for transfer descriptors | |
175 | * @gadget: device side representation for peripheral controller | |
176 | * @driver: gadget driver | |
177 | * @hw_ep_max: total number of endpoints supported by hardware | |
8e22978c | 178 | * @ci_hw_ep: array of endpoints |
551a8ac6 AS |
179 | * @ep0_dir: ep0 direction |
180 | * @ep0out: pointer to ep0 OUT endpoint | |
181 | * @ep0in: pointer to ep0 IN endpoint | |
182 | * @status: ep0 status request | |
183 | * @setaddr: if we should set the address on status completion | |
184 | * @address: usb address received from the host | |
185 | * @remote_wakeup: host-enabled remote wakeup | |
186 | * @suspended: suspended by host | |
187 | * @test_mode: the selected test mode | |
77c4400f | 188 | * @platdata: platform specific information supplied by parent device |
551a8ac6 | 189 | * @vbus_active: is VBUS active |
1e5e2d3d AT |
190 | * @phy: pointer to PHY, if any |
191 | * @usb_phy: pointer to USB PHY, if any and if using the USB PHY framework | |
eb70e5ab | 192 | * @hcd: pointer to usb_hcd for ehci host driver |
2d651289 | 193 | * @debugfs: root dentry for this controller in debugfs |
a107f8c5 PC |
194 | * @id_event: indicates there is an id event, and handled at ci_otg_work |
195 | * @b_sess_valid_event: indicates there is a vbus event, and handled | |
196 | * at ci_otg_work | |
ed8f8318 | 197 | * @imx28_write_fix: Freescale imx28 needs swp instruction for writing |
1f874edc PC |
198 | * @supports_runtime_pm: if runtime pm is supported |
199 | * @in_lpm: if the core in low power mode | |
200 | * @wakeup_int: if wakeup interrupt occur | |
cb271f3c | 201 | * @rev: The revision number for controller |
551a8ac6 | 202 | */ |
8e22978c | 203 | struct ci_hdrc { |
551a8ac6 AS |
204 | struct device *dev; |
205 | spinlock_t lock; | |
206 | struct hw_bank hw_bank; | |
207 | int irq; | |
208 | struct ci_role_driver *roles[CI_ROLE_END]; | |
209 | enum ci_role role; | |
210 | bool is_otg; | |
ef44cb42 | 211 | struct usb_otg otg; |
57677be5 | 212 | struct otg_fsm fsm; |
3a316ec4 LJ |
213 | struct hrtimer otg_fsm_hrtimer; |
214 | ktime_t hr_timeouts[NUM_OTG_FSM_TIMERS]; | |
215 | unsigned enabled_otg_timer_bits; | |
216 | enum otg_fsm_timer next_otg_timer; | |
551a8ac6 AS |
217 | struct work_struct work; |
218 | struct workqueue_struct *wq; | |
219 | ||
220 | struct dma_pool *qh_pool; | |
221 | struct dma_pool *td_pool; | |
222 | ||
223 | struct usb_gadget gadget; | |
224 | struct usb_gadget_driver *driver; | |
225 | unsigned hw_ep_max; | |
8e22978c | 226 | struct ci_hw_ep ci_hw_ep[ENDPT_MAX]; |
551a8ac6 | 227 | u32 ep0_dir; |
8e22978c | 228 | struct ci_hw_ep *ep0out, *ep0in; |
551a8ac6 AS |
229 | |
230 | struct usb_request *status; | |
231 | bool setaddr; | |
232 | u8 address; | |
233 | u8 remote_wakeup; | |
234 | u8 suspended; | |
235 | u8 test_mode; | |
236 | ||
8e22978c | 237 | struct ci_hdrc_platform_data *platdata; |
551a8ac6 | 238 | int vbus_active; |
1e5e2d3d AT |
239 | struct phy *phy; |
240 | /* old usb_phy interface */ | |
ef44cb42 | 241 | struct usb_phy *usb_phy; |
eb70e5ab | 242 | struct usb_hcd *hcd; |
2d651289 | 243 | struct dentry *debugfs; |
a107f8c5 PC |
244 | bool id_event; |
245 | bool b_sess_valid_event; | |
ed8f8318 | 246 | bool imx28_write_fix; |
1f874edc PC |
247 | bool supports_runtime_pm; |
248 | bool in_lpm; | |
249 | bool wakeup_int; | |
cb271f3c | 250 | enum ci_revision rev; |
e443b333 AS |
251 | }; |
252 | ||
8e22978c | 253 | static inline struct ci_role_driver *ci_role(struct ci_hdrc *ci) |
5f36e231 AS |
254 | { |
255 | BUG_ON(ci->role >= CI_ROLE_END || !ci->roles[ci->role]); | |
256 | return ci->roles[ci->role]; | |
257 | } | |
258 | ||
8e22978c | 259 | static inline int ci_role_start(struct ci_hdrc *ci, enum ci_role role) |
5f36e231 AS |
260 | { |
261 | int ret; | |
262 | ||
263 | if (role >= CI_ROLE_END) | |
264 | return -EINVAL; | |
265 | ||
266 | if (!ci->roles[role]) | |
267 | return -ENXIO; | |
268 | ||
269 | ret = ci->roles[role]->start(ci); | |
270 | if (!ret) | |
271 | ci->role = role; | |
272 | return ret; | |
273 | } | |
274 | ||
8e22978c | 275 | static inline void ci_role_stop(struct ci_hdrc *ci) |
5f36e231 AS |
276 | { |
277 | enum ci_role role = ci->role; | |
278 | ||
279 | if (role == CI_ROLE_END) | |
280 | return; | |
281 | ||
282 | ci->role = CI_ROLE_END; | |
283 | ||
284 | ci->roles[role]->stop(ci); | |
285 | } | |
286 | ||
655d32e9 PC |
287 | /** |
288 | * hw_read_id_reg: reads from a identification register | |
289 | * @ci: the controller | |
290 | * @offset: offset from the beginning of identification registers region | |
291 | * @mask: bitfield mask | |
292 | * | |
293 | * This function returns register contents | |
294 | */ | |
295 | static inline u32 hw_read_id_reg(struct ci_hdrc *ci, u32 offset, u32 mask) | |
296 | { | |
297 | return ioread32(ci->hw_bank.abs + offset) & mask; | |
298 | } | |
299 | ||
300 | /** | |
301 | * hw_write_id_reg: writes to a identification register | |
302 | * @ci: the controller | |
303 | * @offset: offset from the beginning of identification registers region | |
304 | * @mask: bitfield mask | |
305 | * @data: new value | |
306 | */ | |
307 | static inline void hw_write_id_reg(struct ci_hdrc *ci, u32 offset, | |
308 | u32 mask, u32 data) | |
309 | { | |
310 | if (~mask) | |
311 | data = (ioread32(ci->hw_bank.abs + offset) & ~mask) | |
312 | | (data & mask); | |
313 | ||
314 | iowrite32(data, ci->hw_bank.abs + offset); | |
315 | } | |
316 | ||
e443b333 AS |
317 | /** |
318 | * hw_read: reads from a hw register | |
19353881 | 319 | * @ci: the controller |
e443b333 AS |
320 | * @reg: register index |
321 | * @mask: bitfield mask | |
322 | * | |
323 | * This function returns register contents | |
324 | */ | |
8e22978c | 325 | static inline u32 hw_read(struct ci_hdrc *ci, enum ci_hw_regs reg, u32 mask) |
e443b333 | 326 | { |
26c696c6 | 327 | return ioread32(ci->hw_bank.regmap[reg]) & mask; |
e443b333 AS |
328 | } |
329 | ||
ed8f8318 PC |
330 | #ifdef CONFIG_SOC_IMX28 |
331 | static inline void imx28_ci_writel(u32 val, volatile void __iomem *addr) | |
332 | { | |
333 | __asm__ ("swp %0, %0, [%1]" : : "r"(val), "r"(addr)); | |
334 | } | |
335 | #else | |
336 | static inline void imx28_ci_writel(u32 val, volatile void __iomem *addr) | |
337 | { | |
338 | } | |
339 | #endif | |
340 | ||
341 | static inline void __hw_write(struct ci_hdrc *ci, u32 val, | |
342 | void __iomem *addr) | |
343 | { | |
344 | if (ci->imx28_write_fix) | |
345 | imx28_ci_writel(val, addr); | |
346 | else | |
347 | iowrite32(val, addr); | |
348 | } | |
349 | ||
e443b333 AS |
350 | /** |
351 | * hw_write: writes to a hw register | |
19353881 | 352 | * @ci: the controller |
e443b333 AS |
353 | * @reg: register index |
354 | * @mask: bitfield mask | |
355 | * @data: new value | |
356 | */ | |
8e22978c | 357 | static inline void hw_write(struct ci_hdrc *ci, enum ci_hw_regs reg, |
e443b333 AS |
358 | u32 mask, u32 data) |
359 | { | |
360 | if (~mask) | |
26c696c6 | 361 | data = (ioread32(ci->hw_bank.regmap[reg]) & ~mask) |
e443b333 AS |
362 | | (data & mask); |
363 | ||
ed8f8318 | 364 | __hw_write(ci, data, ci->hw_bank.regmap[reg]); |
e443b333 AS |
365 | } |
366 | ||
367 | /** | |
368 | * hw_test_and_clear: tests & clears a hw register | |
19353881 | 369 | * @ci: the controller |
e443b333 AS |
370 | * @reg: register index |
371 | * @mask: bitfield mask | |
372 | * | |
373 | * This function returns register contents | |
374 | */ | |
8e22978c | 375 | static inline u32 hw_test_and_clear(struct ci_hdrc *ci, enum ci_hw_regs reg, |
e443b333 AS |
376 | u32 mask) |
377 | { | |
26c696c6 | 378 | u32 val = ioread32(ci->hw_bank.regmap[reg]) & mask; |
e443b333 | 379 | |
ed8f8318 | 380 | __hw_write(ci, val, ci->hw_bank.regmap[reg]); |
e443b333 AS |
381 | return val; |
382 | } | |
383 | ||
384 | /** | |
385 | * hw_test_and_write: tests & writes a hw register | |
19353881 | 386 | * @ci: the controller |
e443b333 AS |
387 | * @reg: register index |
388 | * @mask: bitfield mask | |
389 | * @data: new value | |
390 | * | |
391 | * This function returns register contents | |
392 | */ | |
8e22978c | 393 | static inline u32 hw_test_and_write(struct ci_hdrc *ci, enum ci_hw_regs reg, |
e443b333 AS |
394 | u32 mask, u32 data) |
395 | { | |
26c696c6 | 396 | u32 val = hw_read(ci, reg, ~0); |
e443b333 | 397 | |
26c696c6 | 398 | hw_write(ci, reg, mask, data); |
727b4ddb | 399 | return (val & mask) >> __ffs(mask); |
e443b333 AS |
400 | } |
401 | ||
57677be5 LJ |
402 | /** |
403 | * ci_otg_is_fsm_mode: runtime check if otg controller | |
404 | * is in otg fsm mode. | |
19353881 PC |
405 | * |
406 | * @ci: chipidea device | |
57677be5 LJ |
407 | */ |
408 | static inline bool ci_otg_is_fsm_mode(struct ci_hdrc *ci) | |
409 | { | |
410 | #ifdef CONFIG_USB_OTG_FSM | |
b0930d4c LJ |
411 | struct usb_otg_caps *otg_caps = &ci->platdata->ci_otg_caps; |
412 | ||
57677be5 | 413 | return ci->is_otg && ci->roles[CI_ROLE_HOST] && |
b0930d4c LJ |
414 | ci->roles[CI_ROLE_GADGET] && (otg_caps->srp_support || |
415 | otg_caps->hnp_support || otg_caps->adp_support); | |
57677be5 LJ |
416 | #else |
417 | return false; | |
418 | #endif | |
419 | } | |
420 | ||
36304b06 LJ |
421 | u32 hw_read_intr_enable(struct ci_hdrc *ci); |
422 | ||
423 | u32 hw_read_intr_status(struct ci_hdrc *ci); | |
424 | ||
5b157300 | 425 | int hw_device_reset(struct ci_hdrc *ci); |
e443b333 | 426 | |
8e22978c | 427 | int hw_port_test_set(struct ci_hdrc *ci, u8 mode); |
e443b333 | 428 | |
8e22978c | 429 | u8 hw_port_test_get(struct ci_hdrc *ci); |
e443b333 | 430 | |
22fa8445 PC |
431 | int hw_wait_reg(struct ci_hdrc *ci, enum ci_hw_regs reg, u32 mask, |
432 | u32 value, unsigned int timeout_ms); | |
433 | ||
bf9c85e7 PC |
434 | void ci_platform_configure(struct ci_hdrc *ci); |
435 | ||
e443b333 | 436 | #endif /* __DRIVERS_USB_CHIPIDEA_CI_H */ |