1 /*
2 * MUSB OTG driver defines
3 *
4 * Copyright 2005 Mentor Graphics Corporation
5 * Copyright (C) 2005-2006 by Texas Instruments
6 * Copyright (C) 2006-2007 Nokia Corporation
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
25 * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
29 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 */
35 #ifndef __MUSB_CORE_H__
36 #define __MUSB_CORE_H__
38 #include <linux/slab.h>
39 #include <linux/list.h>
40 #include <linux/interrupt.h>
41 #include <linux/errno.h>
42 #include <linux/timer.h>
43 #include <linux/device.h>
44 #include <linux/usb/ch9.h>
45 #include <linux/usb/gadget.h>
46 #include <linux/usb.h>
47 #include <linux/usb/otg.h>
48 #include <linux/usb/musb.h>
50 struct musb;
51 struct musb_hw_ep;
52 struct musb_ep;
54 /* Helper defines for struct musb->hwvers */
55 #define MUSB_HWVERS_MAJOR(x) ((x >> 10) & 0x1f)
56 #define MUSB_HWVERS_MINOR(x) (x & 0x3ff)
57 #define MUSB_HWVERS_RC 0x8000
58 #define MUSB_HWVERS_1300 0x52C
59 #define MUSB_HWVERS_1400 0x590
60 #define MUSB_HWVERS_1800 0x720
61 #define MUSB_HWVERS_1900 0x784
62 #define MUSB_HWVERS_2000 0x800
64 extern u8 (*musb_readb)(const void __iomem *addr, unsigned offset);
65 extern void (*musb_writeb)(void __iomem *addr, unsigned offset, u8 data);
67 #include "musb_debug.h"
68 #include "musb_dma.h"
70 #include "musb_io.h"
71 #include "musb_regs.h"
73 #include "musb_gadget.h"
74 #include <linux/usb/hcd.h>
75 #include "musb_host.h"
77 #define is_peripheral_enabled(musb) ((musb)->board_mode != MUSB_HOST)
78 #define is_host_enabled(musb) ((musb)->board_mode != MUSB_PERIPHERAL)
79 #define is_otg_enabled(musb) ((musb)->board_mode == MUSB_OTG)
81 /* NOTE: otg and peripheral-only state machines start at B_IDLE.
82 * OTG or host-only go to A_IDLE when ID is sensed.
83 */
84 #define is_peripheral_active(m) (!(m)->is_host)
85 #define is_host_active(m) ((m)->is_host)
87 #ifndef CONFIG_HAVE_CLK
88 /* Dummy stub for clk framework */
89 #define clk_get(dev, id) NULL
90 #define clk_put(clock) do {} while (0)
91 #define clk_enable(clock) do {} while (0)
92 #define clk_disable(clock) do {} while (0)
93 #endif
95 #ifdef CONFIG_PROC_FS
96 #include <linux/fs.h>
97 #define MUSB_CONFIG_PROC_FS
98 #endif
100 /****************************** PERIPHERAL ROLE *****************************/
102 #define is_peripheral_capable() (1)
104 extern irqreturn_t musb_g_ep0_irq(struct musb *);
105 extern void musb_g_tx(struct musb *, u8);
106 extern void musb_g_rx(struct musb *, u8);
107 extern void musb_g_reset(struct musb *);
108 extern void musb_g_suspend(struct musb *);
109 extern void musb_g_resume(struct musb *);
110 extern void musb_g_wakeup(struct musb *);
111 extern void musb_g_disconnect(struct musb *);
113 /****************************** HOST ROLE ***********************************/
115 #define is_host_capable() (1)
117 extern irqreturn_t musb_h_ep0_irq(struct musb *);
118 extern void musb_host_tx(struct musb *, u8);
119 extern void musb_host_rx(struct musb *, u8);
121 /****************************** CONSTANTS ********************************/
123 #ifndef MUSB_C_NUM_EPS
124 #define MUSB_C_NUM_EPS ((u8)16)
125 #endif
127 #ifndef MUSB_MAX_END0_PACKET
128 #define MUSB_MAX_END0_PACKET ((u16)MUSB_EP0_FIFOSIZE)
129 #endif
131 /* host side ep0 states */
132 enum musb_h_ep0_state {
133 MUSB_EP0_IDLE,
134 MUSB_EP0_START, /* expect ack of setup */
135 MUSB_EP0_IN, /* expect IN DATA */
136 MUSB_EP0_OUT, /* expect ack of OUT DATA */
137 MUSB_EP0_STATUS, /* expect ack of STATUS */
138 } __attribute__ ((packed));
140 /* peripheral side ep0 states */
141 enum musb_g_ep0_state {
142 MUSB_EP0_STAGE_IDLE, /* idle, waiting for SETUP */
143 MUSB_EP0_STAGE_SETUP, /* received SETUP */
144 MUSB_EP0_STAGE_TX, /* IN data */
145 MUSB_EP0_STAGE_RX, /* OUT data */
146 MUSB_EP0_STAGE_STATUSIN, /* (after OUT data) */
147 MUSB_EP0_STAGE_STATUSOUT, /* (after IN data) */
148 MUSB_EP0_STAGE_ACKWAIT, /* after zlp, before statusin */
149 } __attribute__ ((packed));
151 /*
152 * OTG protocol constants. See USB OTG 1.3 spec,
153 * sections 5.5 "Device Timings" and 6.6.5 "Timers".
154 */
155 #define OTG_TIME_A_WAIT_VRISE 100 /* msec (max) */
156 #define OTG_TIME_A_WAIT_BCON 1100 /* min 1 second */
157 #define OTG_TIME_A_AIDL_BDIS 200 /* min 200 msec */
158 #define OTG_TIME_B_ASE0_BRST 100 /* min 3.125 ms */
161 /*************************** REGISTER ACCESS ********************************/
163 /* Endpoint registers (other than dynfifo setup) can be accessed either
164 * directly with the "flat" model, or after setting up an index register.
165 */
167 #define musb_ep_select(_musb, _mbase, _epnum) do { \
168 if (_musb->ops->flags & MUSB_GLUE_EP_ADDR_INDEXED_MAPPING) \
169 musb_writeb((_mbase), MUSB_INDEX, (_epnum)); \
170 } while (0)
172 #define MUSB_EP_OFFSET MUSB_OFFSET
173 /****************************** FUNCTIONS ********************************/
175 #define MUSB_HST_MODE(_musb)\
176 { (_musb)->is_host = true; }
177 #define MUSB_DEV_MODE(_musb) \
178 { (_musb)->is_host = false; }
180 #define test_devctl_hst_mode(_x) \
181 (musb_readb((_x)->mregs, MUSB_DEVCTL)&MUSB_DEVCTL_HM)
183 #define MUSB_MODE(musb) ((musb)->is_host ? "Host" : "Peripheral")
185 /******************************** TYPES *************************************/
187 #define MUSB_GLUE_TUSB_STYLE 0x0001
188 #define MUSB_GLUE_EP_ADDR_FLAT_MAPPING 0x0002
189 #define MUSB_GLUE_EP_ADDR_INDEXED_MAPPING 0x0004
191 /**
192 * struct musb_platform_ops - Operations passed to musb_core by HW glue layer
193 * @fifo_mode: which fifo_mode is taken by me
194 * @flags: each hw glue difference information will be here
195 * @init: turns on clocks, sets up platform-specific registers, etc
196 * @exit: undoes @init
197 * @read_fifo: read data from musb fifo in PIO
198 * @write_fifo: write data into musb fifo in PIO
199 * @set_mode: forcefully changes operating mode
200 * @try_ilde: tries to idle the IP
201 * @get_hw_revision: get hardware revision
202 * @vbus_status: returns vbus status if possible
203 * @set_vbus: forces vbus status
204 * @adjust_channel_params: pre check for standard dma channel_program func
205 */
206 struct musb_platform_ops {
207 short fifo_mode;
208 unsigned short flags;
209 int (*init)(struct musb *musb);
210 int (*exit)(struct musb *musb);
212 void (*enable)(struct musb *musb);
213 void (*disable)(struct musb *musb);
215 void (*read_fifo)(struct musb_hw_ep *hw_ep, u16 len, u8 *buf);
216 void (*write_fifo)(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf);
218 int (*set_mode)(struct musb *musb, u8 mode);
219 void (*try_idle)(struct musb *musb, unsigned long timeout);
221 u16 (*get_hw_revision)(struct musb *musb);
223 int (*vbus_status)(struct musb *musb);
224 void (*set_vbus)(struct musb *musb, int on);
226 int (*adjust_channel_params)(struct dma_channel *channel,
227 u16 packet_sz, u8 *mode,
228 dma_addr_t *dma_addr, u32 *len);
229 };
231 /*
232 * struct musb_hw_ep - endpoint hardware (bidirectional)
233 *
234 * Ordered slightly for better cacheline locality.
235 */
236 struct musb_hw_ep {
237 struct musb *musb;
238 void __iomem *fifo;
239 void __iomem *regs;
241 /*Fixme: the following field is only used by tusb*/
242 void __iomem *conf;
244 /* index in musb->endpoints[] */
245 u8 epnum;
247 /* hardware configuration, possibly dynamic */
248 bool is_shared_fifo;
249 bool tx_double_buffered;
250 bool rx_double_buffered;
251 u16 max_packet_sz_tx;
252 u16 max_packet_sz_rx;
254 struct dma_channel *tx_channel;
255 struct dma_channel *rx_channel;
257 /*
258 * TUSB has "asynchronous" and "synchronous" dma modes
259 * Fixme: the following three fields are only valid for TUSB.
260 * */
261 dma_addr_t fifo_async;
262 dma_addr_t fifo_sync;
263 void __iomem *fifo_sync_va;
265 void __iomem *target_regs;
267 /* currently scheduled peripheral endpoint */
268 struct musb_qh *in_qh;
269 struct musb_qh *out_qh;
271 u8 rx_reinit;
272 u8 tx_reinit;
274 /* peripheral side */
275 struct musb_ep ep_in; /* TX */
276 struct musb_ep ep_out; /* RX */
277 };
279 static inline struct musb_request *next_in_request(struct musb_hw_ep *hw_ep)
280 {
281 return next_request(&hw_ep->ep_in);
282 }
284 static inline struct musb_request *next_out_request(struct musb_hw_ep *hw_ep)
285 {
286 return next_request(&hw_ep->ep_out);
287 }
289 struct musb_csr_regs {
290 /* FIFO registers */
291 u16 txmaxp, txcsr, rxmaxp, rxcsr;
292 u16 rxfifoadd, txfifoadd;
293 u8 txtype, txinterval, rxtype, rxinterval;
294 u8 rxfifosz, txfifosz;
295 u8 txfunaddr, txhubaddr, txhubport;
296 u8 rxfunaddr, rxhubaddr, rxhubport;
297 };
299 struct musb_context_registers {
301 u8 power;
302 u16 intrtxe, intrrxe;
303 u8 intrusbe;
304 u16 frame;
305 u8 index, testmode;
307 u8 devctl, busctl, misc;
308 u32 otg_interfsel;
310 struct musb_csr_regs index_regs[MUSB_C_NUM_EPS];
311 };
313 /*
314 * struct musb - Driver instance data.
315 */
316 struct musb {
317 /* device lock */
318 spinlock_t lock;
320 const struct musb_platform_ops *ops;
321 struct musb_context_registers context;
323 irqreturn_t (*isr)(int, void *);
324 struct work_struct irq_work;
325 struct work_struct otg_notifier_work;
326 u16 hwvers;
328 /* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
329 #define MUSB_PORT_STAT_RESUME (1 << 31)
331 u32 port1_status;
333 unsigned long rh_timer;
335 enum musb_h_ep0_state ep0_stage;
337 /* bulk traffic normally dedicates endpoint hardware, and each
338 * direction has its own ring of host side endpoints.
339 * we try to progress the transfer at the head of each endpoint's
340 * queue until it completes or NAKs too much; then we try the next
341 * endpoint.
342 */
343 struct musb_hw_ep *bulk_ep;
345 struct list_head control; /* of musb_qh */
346 struct list_head in_bulk; /* of musb_qh */
347 struct list_head out_bulk; /* of musb_qh */
349 struct timer_list otg_timer;
350 struct notifier_block nb;
352 struct dma_controller *dma_controller;
354 struct device *controller;
355 void __iomem *ctrl_base;
356 void __iomem *mregs;
358 /*Fixme: the three fields below are only used by tusb*/
359 dma_addr_t async;
360 dma_addr_t sync;
361 void __iomem *sync_va;
363 /* passed down from chip/board specific irq handlers */
364 u8 int_usb;
365 u16 int_rx;
366 u16 int_tx;
368 struct otg_transceiver *xceiv;
369 u8 xceiv_event;
371 int nIrq;
372 unsigned irq_wake:1;
374 struct musb_hw_ep endpoints[MUSB_C_NUM_EPS];
375 #define control_ep endpoints
377 #define VBUSERR_RETRY_COUNT 3
378 u16 vbuserr_retry;
379 u16 epmask;
380 u8 nr_endpoints;
382 u8 board_mode; /* enum musb_mode */
383 int (*board_set_power)(int state);
385 u8 min_power; /* vbus for periph, in mA/2 */
387 bool is_host;
389 int a_wait_bcon; /* VBUS timeout in msecs */
390 unsigned long idle_timeout; /* Next timeout in jiffies */
392 /* active means connected and not suspended */
393 unsigned is_active:1;
395 unsigned is_multipoint:1;
396 unsigned ignore_disconnect:1; /* during bus resets */
398 unsigned hb_iso_rx:1; /* high bandwidth iso rx? */
399 unsigned hb_iso_tx:1; /* high bandwidth iso tx? */
400 unsigned dyn_fifo:1; /* dynamic FIFO supported? */
402 unsigned bulk_split:1;
403 #define can_bulk_split(musb,type) \
404 (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_split)
406 unsigned bulk_combine:1;
407 #define can_bulk_combine(musb,type) \
408 (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_combine)
410 /* is_suspended means USB B_PERIPHERAL suspend */
411 unsigned is_suspended:1;
413 /* may_wakeup means remote wakeup is enabled */
414 unsigned may_wakeup:1;
416 /* is_self_powered is reported in device status and the
417 * config descriptor. is_bus_powered means B_PERIPHERAL
418 * draws some VBUS current; both can be true.
419 */
420 unsigned is_self_powered:1;
421 unsigned is_bus_powered:1;
423 unsigned set_address:1;
424 unsigned test_mode:1;
425 unsigned softconnect:1;
427 u8 address;
428 u8 test_mode_nr;
429 u16 ackpend; /* ep0 */
430 enum musb_g_ep0_state ep0_state;
431 struct usb_gadget g; /* the gadget */
432 struct usb_gadget_driver *gadget_driver; /* its driver */
434 /*
435 * FIXME: Remove this flag.
436 *
437 * This is only added to allow Blackfin to work
438 * with current driver. For some unknown reason
439 * Blackfin doesn't work with double buffering
440 * and that's enabled by default.
441 *
442 * We added this flag to forcefully disable double
443 * buffering until we get it working.
444 */
445 unsigned double_buffer_not_ok:1 __deprecated;
447 struct musb_hdrc_config *config;
449 #ifdef MUSB_CONFIG_PROC_FS
450 struct proc_dir_entry *proc_entry;
451 #endif
452 };
454 static inline struct musb *gadget_to_musb(struct usb_gadget *g)
455 {
456 return container_of(g, struct musb, g);
457 }
459 #ifdef CONFIG_BLACKFIN
460 static inline int musb_read_fifosize(struct musb *musb,
461 struct musb_hw_ep *hw_ep, u8 epnum)
462 {
463 musb->nr_endpoints++;
464 musb->epmask |= (1 << epnum);
466 if (epnum < 5) {
467 hw_ep->max_packet_sz_tx = 128;
468 hw_ep->max_packet_sz_rx = 128;
469 } else {
470 hw_ep->max_packet_sz_tx = 1024;
471 hw_ep->max_packet_sz_rx = 1024;
472 }
473 hw_ep->is_shared_fifo = false;
475 return 0;
476 }
478 static inline void musb_configure_ep0(struct musb *musb)
479 {
480 musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
481 musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
482 musb->endpoints[0].is_shared_fifo = true;
483 }
485 #else
487 static inline int musb_read_fifosize(struct musb *musb,
488 struct musb_hw_ep *hw_ep, u8 epnum)
489 {
490 void *mbase = musb->mregs;
491 u8 reg = 0;
493 /* read from core using indexed model */
494 reg = musb_readb(mbase, MUSB_EP_OFFSET(musb, epnum, MUSB_FIFOSIZE));
495 /* 0's returned when no more endpoints */
496 if (!reg)
497 return -ENODEV;
499 musb->nr_endpoints++;
500 musb->epmask |= (1 << epnum);
502 hw_ep->max_packet_sz_tx = 1 << (reg & 0x0f);
504 /* shared TX/RX FIFO? */
505 if ((reg & 0xf0) == 0xf0) {
506 hw_ep->max_packet_sz_rx = hw_ep->max_packet_sz_tx;
507 hw_ep->is_shared_fifo = true;
508 return 0;
509 } else {
510 hw_ep->max_packet_sz_rx = 1 << ((reg & 0xf0) >> 4);
511 hw_ep->is_shared_fifo = false;
512 }
514 return 0;
515 }
517 static inline void musb_configure_ep0(struct musb *musb)
518 {
519 musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
520 musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
521 musb->endpoints[0].is_shared_fifo = true;
522 }
523 #endif /* CONFIG_BLACKFIN */
526 /***************************** Glue it together *****************************/
528 extern const char musb_driver_name[];
530 extern void musb_start(struct musb *musb);
531 extern void musb_stop(struct musb *musb);
533 extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src);
534 extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst);
536 extern void musb_load_testpacket(struct musb *);
538 extern irqreturn_t musb_interrupt(struct musb *);
540 extern void musb_hnp_stop(struct musb *musb);
542 static inline void musb_platform_set_vbus(struct musb *musb, int is_on)
543 {
544 if (musb->ops->set_vbus)
545 musb->ops->set_vbus(musb, is_on);
546 }
548 static inline void musb_platform_enable(struct musb *musb)
549 {
550 if (musb->ops->enable)
551 musb->ops->enable(musb);
552 }
554 static inline void musb_platform_disable(struct musb *musb)
555 {
556 if (musb->ops->disable)
557 musb->ops->disable(musb);
558 }
560 static inline int musb_platform_set_mode(struct musb *musb, u8 mode)
561 {
562 if (!musb->ops->set_mode)
563 return 0;
565 return musb->ops->set_mode(musb, mode);
566 }
568 static inline void musb_platform_try_idle(struct musb *musb,
569 unsigned long timeout)
570 {
571 if (musb->ops->try_idle)
572 musb->ops->try_idle(musb, timeout);
573 }
575 static inline int musb_platform_get_vbus_status(struct musb *musb)
576 {
577 if (!musb->ops->vbus_status)
578 return 0;
580 return musb->ops->vbus_status(musb);
581 }
583 static inline int musb_platform_init(struct musb *musb)
584 {
585 if (!musb->ops->init)
586 return -EINVAL;
588 return musb->ops->init(musb);
589 }
591 static inline int musb_platform_exit(struct musb *musb)
592 {
593 if (!musb->ops->exit)
594 return -EINVAL;
596 return musb->ops->exit(musb);
597 }
599 static inline u16 musb_platform_get_hw_revision(struct musb *musb)
600 {
601 if (!musb->ops->get_hw_revision)
602 return musb_readw(musb->mregs, MUSB_HWVERS);
604 return musb->ops->get_hw_revision(musb);
605 }
607 #endif /* __MUSB_CORE_H__ */