2 * MUSB OTG driver defines
4 * Copyright 2005 Mentor Graphics Corporation
5 * Copyright (C) 2005-2006 by Texas Instruments
6 * Copyright (C) 2006-2007 Nokia Corporation
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.
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.
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
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.
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/smp_lock.h>
42 #include <linux/errno.h>
43 #include <linux/clk.h>
44 #include <linux/device.h>
45 #include <linux/usb/ch9.h>
46 #include <linux/usb/gadget.h>
47 #include <linux/usb.h>
48 #include <linux/usb/otg.h>
49 #include <linux/usb/musb.h>
56 #include "musb_debug.h"
60 #include "musb_regs.h"
62 #include "musb_gadget.h"
63 #include "../core/hcd.h"
64 #include "musb_host.h"
68 #ifdef CONFIG_USB_MUSB_OTG
70 #define is_peripheral_enabled(musb) ((musb)->board_mode != MUSB_HOST)
71 #define is_host_enabled(musb) ((musb)->board_mode != MUSB_PERIPHERAL)
72 #define is_otg_enabled(musb) ((musb)->board_mode == MUSB_OTG)
74 /* NOTE: otg and peripheral-only state machines start at B_IDLE.
75 * OTG or host-only go to A_IDLE when ID is sensed.
77 #define is_peripheral_active(m) (!(m)->is_host)
78 #define is_host_active(m) ((m)->is_host)
81 #define is_peripheral_enabled(musb) is_peripheral_capable()
82 #define is_host_enabled(musb) is_host_capable()
83 #define is_otg_enabled(musb) 0
85 #define is_peripheral_active(musb) is_peripheral_capable()
86 #define is_host_active(musb) is_host_capable()
89 #if defined(CONFIG_USB_MUSB_OTG) || defined(CONFIG_USB_MUSB_PERIPHERAL)
90 /* for some reason, the "select USB_GADGET_MUSB_HDRC" doesn't always
91 * override that choice selection (often USB_GADGET_DUMMY_HCD).
93 #ifndef CONFIG_USB_GADGET_MUSB_HDRC
94 #error bogus Kconfig output ... select CONFIG_USB_GADGET_MUSB_HDRC
96 #endif /* need MUSB gadget selection */
100 #include <linux/fs.h>
101 #define MUSB_CONFIG_PROC_FS
104 /****************************** PERIPHERAL ROLE *****************************/
106 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
108 #define is_peripheral_capable() (1)
110 extern irqreturn_t musb_g_ep0_irq(struct musb *);
111 extern void musb_g_tx(struct musb *, u8);
112 extern void musb_g_rx(struct musb *, u8);
113 extern void musb_g_reset(struct musb *);
114 extern void musb_g_suspend(struct musb *);
115 extern void musb_g_resume(struct musb *);
116 extern void musb_g_wakeup(struct musb *);
117 extern void musb_g_disconnect(struct musb *);
121 #define is_peripheral_capable() (0)
123 static inline irqreturn_t musb_g_ep0_irq(struct musb *m) { return IRQ_NONE; }
124 static inline void musb_g_reset(struct musb *m) {}
125 static inline void musb_g_suspend(struct musb *m) {}
126 static inline void musb_g_resume(struct musb *m) {}
127 static inline void musb_g_wakeup(struct musb *m) {}
128 static inline void musb_g_disconnect(struct musb *m) {}
132 /****************************** HOST ROLE ***********************************/
134 #ifdef CONFIG_USB_MUSB_HDRC_HCD
136 #define is_host_capable() (1)
138 extern irqreturn_t musb_h_ep0_irq(struct musb *);
139 extern void musb_host_tx(struct musb *, u8);
140 extern void musb_host_rx(struct musb *, u8);
144 #define is_host_capable() (0)
146 static inline irqreturn_t musb_h_ep0_irq(struct musb *m) { return IRQ_NONE; }
147 static inline void musb_host_tx(struct musb *m, u8 e) {}
148 static inline void musb_host_rx(struct musb *m, u8 e) {}
153 /****************************** CONSTANTS ********************************/
155 #ifndef MUSB_C_NUM_EPS
156 #define MUSB_C_NUM_EPS ((u8)16)
159 #ifndef MUSB_MAX_END0_PACKET
160 #define MUSB_MAX_END0_PACKET ((u16)MUSB_EP0_FIFOSIZE)
163 /* host side ep0 states */
164 enum musb_h_ep0_state {
166 MUSB_EP0_START, /* expect ack of setup */
167 MUSB_EP0_IN, /* expect IN DATA */
168 MUSB_EP0_OUT, /* expect ack of OUT DATA */
169 MUSB_EP0_STATUS, /* expect ack of STATUS */
170 } __attribute__ ((packed));
172 /* peripheral side ep0 states */
173 enum musb_g_ep0_state {
174 MUSB_EP0_STAGE_SETUP, /* idle, waiting for setup */
175 MUSB_EP0_STAGE_TX, /* IN data */
176 MUSB_EP0_STAGE_RX, /* OUT data */
177 MUSB_EP0_STAGE_STATUSIN, /* (after OUT data) */
178 MUSB_EP0_STAGE_STATUSOUT, /* (after IN data) */
179 MUSB_EP0_STAGE_ACKWAIT, /* after zlp, before statusin */
180 } __attribute__ ((packed));
182 /* OTG protocol constants */
183 #define OTG_TIME_A_WAIT_VRISE 100 /* msec (max) */
184 #define OTG_TIME_A_WAIT_BCON 0 /* 0=infinite; min 1000 msec */
185 #define OTG_TIME_A_IDLE_BDIS 200 /* msec (min) */
187 /*************************** REGISTER ACCESS ********************************/
189 /* Endpoint registers (other than dynfifo setup) can be accessed either
190 * directly with the "flat" model, or after setting up an index register.
193 #if defined(CONFIG_ARCH_DAVINCI) || defined(CONFIG_ARCH_OMAP2430) \
194 || defined(CONFIG_ARCH_OMAP3430) || defined(CONFIG_BLACKFIN)
195 /* REVISIT indexed access seemed to
196 * misbehave (on DaVinci) for at least peripheral IN ...
198 #define MUSB_FLAT_REG
201 /* TUSB mapping: "flat" plus ep0 special cases */
202 #if defined(CONFIG_USB_TUSB6010)
203 #define musb_ep_select(_mbase, _epnum) \
204 musb_writeb((_mbase), MUSB_INDEX, (_epnum))
205 #define MUSB_EP_OFFSET MUSB_TUSB_OFFSET
207 /* "flat" mapping: each endpoint has its own i/o address */
208 #elif defined(MUSB_FLAT_REG)
209 #define musb_ep_select(_mbase, _epnum) (((void)(_mbase)), ((void)(_epnum)))
210 #define MUSB_EP_OFFSET MUSB_FLAT_OFFSET
212 /* "indexed" mapping: INDEX register controls register bank select */
214 #define musb_ep_select(_mbase, _epnum) \
215 musb_writeb((_mbase), MUSB_INDEX, (_epnum))
216 #define MUSB_EP_OFFSET MUSB_INDEXED_OFFSET
219 /****************************** FUNCTIONS ********************************/
221 #define MUSB_HST_MODE(_musb)\
222 { (_musb)->is_host = true; }
223 #define MUSB_DEV_MODE(_musb) \
224 { (_musb)->is_host = false; }
226 #define test_devctl_hst_mode(_x) \
227 (musb_readb((_x)->mregs, MUSB_DEVCTL)&MUSB_DEVCTL_HM)
229 #define MUSB_MODE(musb) ((musb)->is_host ? "Host" : "Peripheral")
231 /******************************** TYPES *************************************/
234 * struct musb_hw_ep - endpoint hardware (bidirectional)
236 * Ordered slightly for better cacheline locality.
243 #ifdef CONFIG_USB_TUSB6010
247 /* index in musb->endpoints[] */
250 /* hardware configuration, possibly dynamic */
252 bool tx_double_buffered;
253 bool rx_double_buffered;
254 u16 max_packet_sz_tx;
255 u16 max_packet_sz_rx;
257 struct dma_channel *tx_channel;
258 struct dma_channel *rx_channel;
260 #ifdef CONFIG_USB_TUSB6010
261 /* TUSB has "asynchronous" and "synchronous" dma modes */
262 dma_addr_t fifo_async;
263 dma_addr_t fifo_sync;
264 void __iomem *fifo_sync_va;
267 #ifdef CONFIG_USB_MUSB_HDRC_HCD
268 void __iomem *target_regs;
270 /* currently scheduled peripheral endpoint */
271 struct musb_qh *in_qh;
272 struct musb_qh *out_qh;
278 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
279 /* peripheral side */
280 struct musb_ep ep_in; /* TX */
281 struct musb_ep ep_out; /* RX */
285 static inline struct usb_request *next_in_request(struct musb_hw_ep *hw_ep)
287 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
288 return next_request(&hw_ep->ep_in);
294 static inline struct usb_request *next_out_request(struct musb_hw_ep *hw_ep)
296 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
297 return next_request(&hw_ep->ep_out);
304 * struct musb - Driver instance data.
310 irqreturn_t (*isr)(int, void *);
311 struct work_struct irq_work;
313 /* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
314 #define MUSB_PORT_STAT_RESUME (1 << 31)
318 #ifdef CONFIG_USB_MUSB_HDRC_HCD
319 unsigned long rh_timer;
321 enum musb_h_ep0_state ep0_stage;
323 /* bulk traffic normally dedicates endpoint hardware, and each
324 * direction has its own ring of host side endpoints.
325 * we try to progress the transfer at the head of each endpoint's
326 * queue until it completes or NAKs too much; then we try the next
329 struct musb_hw_ep *bulk_ep;
331 struct list_head control; /* of musb_qh */
332 struct list_head in_bulk; /* of musb_qh */
333 struct list_head out_bulk; /* of musb_qh */
336 /* called with IRQs blocked; ON/nonzero implies starting a session,
337 * and waiting at least a_wait_vrise_tmout.
339 void (*board_set_vbus)(struct musb *, int is_on);
341 struct dma_controller *dma_controller;
343 struct device *controller;
344 void __iomem *ctrl_base;
347 #ifdef CONFIG_USB_TUSB6010
350 void __iomem *sync_va;
353 /* passed down from chip/board specific irq handlers */
358 struct otg_transceiver xceiv;
363 struct musb_hw_ep endpoints[MUSB_C_NUM_EPS];
364 #define control_ep endpoints
366 #define VBUSERR_RETRY_COUNT 3
371 u8 board_mode; /* enum musb_mode */
372 int (*board_set_power)(int state);
374 int (*set_clock)(struct clk *clk, int is_active);
376 u8 min_power; /* vbus for periph, in mA/2 */
380 int a_wait_bcon; /* VBUS timeout in msecs */
381 unsigned long idle_timeout; /* Next timeout in jiffies */
383 /* active means connected and not suspended */
384 unsigned is_active:1;
386 unsigned is_multipoint:1;
387 unsigned ignore_disconnect:1; /* during bus resets */
390 unsigned bulk_split:1;
391 #define can_bulk_split(musb,type) \
392 (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_split)
394 #define can_bulk_split(musb, type) 0
398 unsigned bulk_combine:1;
399 #define can_bulk_combine(musb,type) \
400 (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_combine)
402 #define can_bulk_combine(musb, type) 0
405 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
406 /* is_suspended means USB B_PERIPHERAL suspend */
407 unsigned is_suspended:1;
409 /* may_wakeup means remote wakeup is enabled */
410 unsigned may_wakeup:1;
412 /* is_self_powered is reported in device status and the
413 * config descriptor. is_bus_powered means B_PERIPHERAL
414 * draws some VBUS current; both can be true.
416 unsigned is_self_powered:1;
417 unsigned is_bus_powered:1;
419 unsigned set_address:1;
420 unsigned test_mode:1;
421 unsigned softconnect:1;
425 u16 ackpend; /* ep0 */
426 enum musb_g_ep0_state ep0_state;
427 struct usb_gadget g; /* the gadget */
428 struct usb_gadget_driver *gadget_driver; /* its driver */
431 struct musb_hdrc_config *config;
433 #ifdef MUSB_CONFIG_PROC_FS
434 struct proc_dir_entry *proc_entry;
438 static inline void musb_set_vbus(struct musb *musb, int is_on)
440 musb->board_set_vbus(musb, is_on);
443 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
444 static inline struct musb *gadget_to_musb(struct usb_gadget *g)
446 return container_of(g, struct musb, g);
450 #ifdef CONFIG_BLACKFIN
451 static inline int musb_read_fifosize(struct musb *musb,
452 struct musb_hw_ep *hw_ep, u8 epnum)
454 musb->nr_endpoints++;
455 musb->epmask |= (1 << epnum);
458 hw_ep->max_packet_sz_tx = 128;
459 hw_ep->max_packet_sz_rx = 128;
461 hw_ep->max_packet_sz_tx = 1024;
462 hw_ep->max_packet_sz_rx = 1024;
464 hw_ep->is_shared_fifo = false;
469 static inline void musb_configure_ep0(struct musb *musb)
471 musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
472 musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
473 musb->endpoints[0].is_shared_fifo = true;
478 static inline int musb_read_fifosize(struct musb *musb,
479 struct musb_hw_ep *hw_ep, u8 epnum)
481 void *mbase = musb->mregs;
484 /* read from core using indexed model */
485 reg = musb_readb(mbase, MUSB_EP_OFFSET(epnum, MUSB_FIFOSIZE));
486 /* 0's returned when no more endpoints */
490 musb->nr_endpoints++;
491 musb->epmask |= (1 << epnum);
493 hw_ep->max_packet_sz_tx = 1 << (reg & 0x0f);
495 /* shared TX/RX FIFO? */
496 if ((reg & 0xf0) == 0xf0) {
497 hw_ep->max_packet_sz_rx = hw_ep->max_packet_sz_tx;
498 hw_ep->is_shared_fifo = true;
501 hw_ep->max_packet_sz_rx = 1 << ((reg & 0xf0) >> 4);
502 hw_ep->is_shared_fifo = false;
508 static inline void musb_configure_ep0(struct musb *musb)
510 musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
511 musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
512 musb->endpoints[0].is_shared_fifo = true;
514 #endif /* CONFIG_BLACKFIN */
517 /***************************** Glue it together *****************************/
519 extern const char musb_driver_name[];
521 extern void musb_start(struct musb *musb);
522 extern void musb_stop(struct musb *musb);
524 extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src);
525 extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst);
527 extern void musb_load_testpacket(struct musb *);
529 extern irqreturn_t musb_interrupt(struct musb *);
531 extern void musb_platform_enable(struct musb *musb);
532 extern void musb_platform_disable(struct musb *musb);
534 extern void musb_hnp_stop(struct musb *musb);
536 extern int musb_platform_set_mode(struct musb *musb, u8 musb_mode);
538 #if defined(CONFIG_USB_TUSB6010) || defined(CONFIG_BLACKFIN) || \
539 defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP34XX)
540 extern void musb_platform_try_idle(struct musb *musb, unsigned long timeout);
542 #define musb_platform_try_idle(x, y) do {} while (0)
545 #if defined(CONFIG_USB_TUSB6010) || defined(CONFIG_BLACKFIN)
546 extern int musb_platform_get_vbus_status(struct musb *musb);
548 #define musb_platform_get_vbus_status(x) 0
551 extern int __init musb_platform_init(struct musb *musb);
552 extern int musb_platform_exit(struct musb *musb);
554 #endif /* __MUSB_CORE_H__ */