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 * SPDX-License-Identifier: GPL-2.0
11 #ifndef __MUSB_CORE_H__
12 #define __MUSB_CORE_H__
15 #include <linux/slab.h>
16 #include <linux/list.h>
17 #include <linux/interrupt.h>
18 #include <linux/errno.h>
19 #include <linux/timer.h>
20 #include <linux/device.h>
21 #include <linux/usb.h>
22 #include <linux/usb/otg.h>
24 #include <linux/errno.h>
26 #include <linux/usb/ch9.h>
27 #include <linux/usb/gadget.h>
28 #include <linux/usb/musb.h>
34 /* Helper defines for struct musb->hwvers */
35 #define MUSB_HWVERS_MAJOR(x) ((x >> 10) & 0x1f)
36 #define MUSB_HWVERS_MINOR(x) (x & 0x3ff)
37 #define MUSB_HWVERS_RC 0x8000
38 #define MUSB_HWVERS_1300 0x52C
39 #define MUSB_HWVERS_1400 0x590
40 #define MUSB_HWVERS_1800 0x720
41 #define MUSB_HWVERS_1900 0x784
42 #define MUSB_HWVERS_2000 0x800
44 #include "musb_debug.h"
48 #include "musb_regs.h"
50 #include "musb_gadget.h"
52 #include <linux/usb/hcd.h>
54 #include "musb_host.h"
56 #define is_peripheral_enabled(musb) ((musb)->board_mode != MUSB_HOST)
57 #define is_host_enabled(musb) ((musb)->board_mode != MUSB_PERIPHERAL)
58 #define is_otg_enabled(musb) ((musb)->board_mode == MUSB_OTG)
60 /* NOTE: otg and peripheral-only state machines start at B_IDLE.
61 * OTG or host-only go to A_IDLE when ID is sensed.
63 #define is_peripheral_active(m) (!(m)->is_host)
64 #define is_host_active(m) ((m)->is_host)
68 #define MUSB_CONFIG_PROC_FS
71 /****************************** PERIPHERAL ROLE *****************************/
74 #define is_peripheral_capable() (1)
76 #ifdef CONFIG_USB_MUSB_GADGET
77 #define is_peripheral_capable() (1)
79 #define is_peripheral_capable() (0)
83 extern irqreturn_t musb_g_ep0_irq(struct musb *);
84 extern void musb_g_tx(struct musb *, u8);
85 extern void musb_g_rx(struct musb *, u8);
86 extern void musb_g_reset(struct musb *);
87 extern void musb_g_suspend(struct musb *);
88 extern void musb_g_resume(struct musb *);
89 extern void musb_g_wakeup(struct musb *);
90 extern void musb_g_disconnect(struct musb *);
92 /****************************** HOST ROLE ***********************************/
95 #define is_host_capable() (1)
97 #ifdef CONFIG_USB_MUSB_HOST
98 #define is_host_capable() (1)
100 #define is_host_capable() (0)
104 extern irqreturn_t musb_h_ep0_irq(struct musb *);
105 extern void musb_host_tx(struct musb *, u8);
106 extern void musb_host_rx(struct musb *, u8);
108 /****************************** CONSTANTS ********************************/
110 #ifndef MUSB_C_NUM_EPS
111 #define MUSB_C_NUM_EPS ((u8)16)
114 #ifndef MUSB_MAX_END0_PACKET
115 #define MUSB_MAX_END0_PACKET ((u16)MUSB_EP0_FIFOSIZE)
118 /* host side ep0 states */
119 enum musb_h_ep0_state {
121 MUSB_EP0_START, /* expect ack of setup */
122 MUSB_EP0_IN, /* expect IN DATA */
123 MUSB_EP0_OUT, /* expect ack of OUT DATA */
124 MUSB_EP0_STATUS, /* expect ack of STATUS */
125 } __attribute__ ((packed));
127 /* peripheral side ep0 states */
128 enum musb_g_ep0_state {
129 MUSB_EP0_STAGE_IDLE, /* idle, waiting for SETUP */
130 MUSB_EP0_STAGE_SETUP, /* received SETUP */
131 MUSB_EP0_STAGE_TX, /* IN data */
132 MUSB_EP0_STAGE_RX, /* OUT data */
133 MUSB_EP0_STAGE_STATUSIN, /* (after OUT data) */
134 MUSB_EP0_STAGE_STATUSOUT, /* (after IN data) */
135 MUSB_EP0_STAGE_ACKWAIT, /* after zlp, before statusin */
136 } __attribute__ ((packed));
139 * OTG protocol constants. See USB OTG 1.3 spec,
140 * sections 5.5 "Device Timings" and 6.6.5 "Timers".
142 #define OTG_TIME_A_WAIT_VRISE 100 /* msec (max) */
143 #define OTG_TIME_A_WAIT_BCON 1100 /* min 1 second */
144 #define OTG_TIME_A_AIDL_BDIS 200 /* min 200 msec */
145 #define OTG_TIME_B_ASE0_BRST 100 /* min 3.125 ms */
148 /*************************** REGISTER ACCESS ********************************/
150 /* Endpoint registers (other than dynfifo setup) can be accessed either
151 * directly with the "flat" model, or after setting up an index register.
154 #if defined(CONFIG_ARCH_DAVINCI) || defined(CONFIG_SOC_OMAP2430) \
155 || defined(CONFIG_SOC_OMAP3430) || defined(CONFIG_ARCH_OMAP4)
156 /* REVISIT indexed access seemed to
157 * misbehave (on DaVinci) for at least peripheral IN ...
159 #define MUSB_FLAT_REG
162 /* TUSB mapping: "flat" plus ep0 special cases */
163 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
164 defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
165 #define musb_ep_select(_mbase, _epnum) \
166 musb_writeb((_mbase), MUSB_INDEX, (_epnum))
167 #define MUSB_EP_OFFSET MUSB_TUSB_OFFSET
169 /* "flat" mapping: each endpoint has its own i/o address */
170 #elif defined(MUSB_FLAT_REG)
171 #define musb_ep_select(_mbase, _epnum) (((void)(_mbase)), ((void)(_epnum)))
172 #define MUSB_EP_OFFSET MUSB_FLAT_OFFSET
174 /* "indexed" mapping: INDEX register controls register bank select */
176 #define musb_ep_select(_mbase, _epnum) \
177 musb_writeb((_mbase), MUSB_INDEX, (_epnum))
178 #define MUSB_EP_OFFSET MUSB_INDEXED_OFFSET
181 /****************************** FUNCTIONS ********************************/
183 #define MUSB_HST_MODE(_musb)\
184 { (_musb)->is_host = true; }
185 #define MUSB_DEV_MODE(_musb) \
186 { (_musb)->is_host = false; }
188 #define test_devctl_hst_mode(_x) \
189 (musb_readb((_x)->mregs, MUSB_DEVCTL)&MUSB_DEVCTL_HM)
191 #define MUSB_MODE(musb) ((musb)->is_host ? "Host" : "Peripheral")
193 /******************************** TYPES *************************************/
196 * struct musb_platform_ops - Operations passed to musb_core by HW glue layer
197 * @init: turns on clocks, sets up platform-specific registers, etc
198 * @exit: undoes @init
199 * @set_mode: forcefully changes operating mode
200 * @try_ilde: tries to idle the IP
201 * @vbus_status: returns vbus status if possible
202 * @set_vbus: forces vbus status
203 * @adjust_channel_params: pre check for standard dma channel_program func
205 struct musb_platform_ops {
206 int (*init)(struct musb *musb);
207 int (*exit)(struct musb *musb);
210 void (*enable)(struct musb *musb);
212 int (*enable)(struct musb *musb);
214 void (*disable)(struct musb *musb);
216 int (*set_mode)(struct musb *musb, u8 mode);
217 void (*try_idle)(struct musb *musb, unsigned long timeout);
219 int (*vbus_status)(struct musb *musb);
220 void (*set_vbus)(struct musb *musb, int on);
222 int (*adjust_channel_params)(struct dma_channel *channel,
223 u16 packet_sz, u8 *mode,
224 dma_addr_t *dma_addr, u32 *len);
228 * struct musb_hw_ep - endpoint hardware (bidirectional)
230 * Ordered slightly for better cacheline locality.
237 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
238 defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
242 /* index in musb->endpoints[] */
245 /* hardware configuration, possibly dynamic */
247 bool tx_double_buffered;
248 bool rx_double_buffered;
249 u16 max_packet_sz_tx;
250 u16 max_packet_sz_rx;
252 struct dma_channel *tx_channel;
253 struct dma_channel *rx_channel;
255 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
256 defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
257 /* TUSB has "asynchronous" and "synchronous" dma modes */
258 dma_addr_t fifo_async;
259 dma_addr_t fifo_sync;
260 void __iomem *fifo_sync_va;
263 void __iomem *target_regs;
265 /* currently scheduled peripheral endpoint */
266 struct musb_qh *in_qh;
267 struct musb_qh *out_qh;
272 /* peripheral side */
273 struct musb_ep ep_in; /* TX */
274 struct musb_ep ep_out; /* RX */
277 static inline struct musb_request *next_in_request(struct musb_hw_ep *hw_ep)
279 return next_request(&hw_ep->ep_in);
282 static inline struct musb_request *next_out_request(struct musb_hw_ep *hw_ep)
284 return next_request(&hw_ep->ep_out);
287 struct musb_csr_regs {
289 u16 txmaxp, txcsr, rxmaxp, rxcsr;
290 u16 rxfifoadd, txfifoadd;
291 u8 txtype, txinterval, rxtype, rxinterval;
292 u8 rxfifosz, txfifosz;
293 u8 txfunaddr, txhubaddr, txhubport;
294 u8 rxfunaddr, rxhubaddr, rxhubport;
297 struct musb_context_registers {
300 u16 intrtxe, intrrxe;
305 u8 devctl, busctl, misc;
308 struct musb_csr_regs index_regs[MUSB_C_NUM_EPS];
312 * struct musb - Driver instance data.
318 const struct musb_platform_ops *ops;
319 struct musb_context_registers context;
321 irqreturn_t (*isr)(int, void *);
322 struct work_struct irq_work;
325 /* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
326 #define MUSB_PORT_STAT_RESUME (1 << 31)
330 unsigned long rh_timer;
332 enum musb_h_ep0_state ep0_stage;
334 /* bulk traffic normally dedicates endpoint hardware, and each
335 * direction has its own ring of host side endpoints.
336 * we try to progress the transfer at the head of each endpoint's
337 * queue until it completes or NAKs too much; then we try the next
340 struct musb_hw_ep *bulk_ep;
342 struct list_head control; /* of musb_qh */
343 struct list_head in_bulk; /* of musb_qh */
344 struct list_head out_bulk; /* of musb_qh */
346 struct timer_list otg_timer;
347 struct notifier_block nb;
349 struct dma_controller *dma_controller;
351 struct device *controller;
352 void __iomem *ctrl_base;
355 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
356 defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
359 void __iomem *sync_va;
362 /* passed down from chip/board specific irq handlers */
367 struct usb_phy *xceiv;
372 struct musb_hw_ep endpoints[MUSB_C_NUM_EPS];
373 #define control_ep endpoints
375 #define VBUSERR_RETRY_COUNT 3
380 u8 board_mode; /* enum musb_mode */
381 int (*board_set_power)(int state);
383 u8 min_power; /* vbus for periph, in mA/2 */
387 int a_wait_bcon; /* VBUS timeout in msecs */
388 unsigned long idle_timeout; /* Next timeout in jiffies */
390 /* active means connected and not suspended */
391 unsigned is_active:1;
393 unsigned is_multipoint:1;
394 unsigned ignore_disconnect:1; /* during bus resets */
396 unsigned hb_iso_rx:1; /* high bandwidth iso rx? */
397 unsigned hb_iso_tx:1; /* high bandwidth iso tx? */
398 unsigned dyn_fifo:1; /* dynamic FIFO supported? */
400 unsigned bulk_split:1;
401 #define can_bulk_split(musb,type) \
402 (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_split)
404 unsigned bulk_combine:1;
405 #define can_bulk_combine(musb,type) \
406 (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_combine)
408 /* is_suspended means USB B_PERIPHERAL suspend */
409 unsigned is_suspended:1;
411 /* may_wakeup means remote wakeup is enabled */
412 unsigned may_wakeup:1;
414 /* is_self_powered is reported in device status and the
415 * config descriptor. is_bus_powered means B_PERIPHERAL
416 * draws some VBUS current; both can be true.
418 unsigned is_self_powered:1;
419 unsigned is_bus_powered:1;
421 unsigned set_address:1;
422 unsigned test_mode:1;
423 unsigned softconnect:1;
427 u16 ackpend; /* ep0 */
428 enum musb_g_ep0_state ep0_state;
429 struct usb_gadget g; /* the gadget */
430 struct usb_gadget_driver *gadget_driver; /* its driver */
433 * FIXME: Remove this flag.
435 * This is only added to allow Blackfin to work
436 * with current driver. For some unknown reason
437 * Blackfin doesn't work with double buffering
438 * and that's enabled by default.
440 * We added this flag to forcefully disable double
441 * buffering until we get it working.
443 unsigned double_buffer_not_ok:1;
445 struct musb_hdrc_config *config;
447 #ifdef MUSB_CONFIG_PROC_FS
448 struct proc_dir_entry *proc_entry;
452 static inline struct musb *gadget_to_musb(struct usb_gadget *g)
454 return container_of(g, struct musb, g);
457 static inline int musb_read_fifosize(struct musb *musb,
458 struct musb_hw_ep *hw_ep, u8 epnum)
460 void *mbase = musb->mregs;
463 /* read from core using indexed model */
464 reg = musb_readb(mbase, MUSB_EP_OFFSET(epnum, MUSB_FIFOSIZE));
465 /* 0's returned when no more endpoints */
469 musb->nr_endpoints++;
470 musb->epmask |= (1 << epnum);
472 hw_ep->max_packet_sz_tx = 1 << (reg & 0x0f);
474 /* shared TX/RX FIFO? */
475 if ((reg & 0xf0) == 0xf0) {
476 hw_ep->max_packet_sz_rx = hw_ep->max_packet_sz_tx;
477 hw_ep->is_shared_fifo = true;
480 hw_ep->max_packet_sz_rx = 1 << ((reg & 0xf0) >> 4);
481 hw_ep->is_shared_fifo = false;
487 static inline void musb_configure_ep0(struct musb *musb)
489 musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
490 musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
491 musb->endpoints[0].is_shared_fifo = true;
494 /***************************** Glue it together *****************************/
496 extern const char musb_driver_name[];
499 extern void musb_start(struct musb *musb);
501 extern int musb_start(struct musb *musb);
503 extern void musb_stop(struct musb *musb);
505 extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src);
506 extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst);
508 extern void musb_load_testpacket(struct musb *);
510 extern irqreturn_t musb_interrupt(struct musb *);
512 extern void musb_hnp_stop(struct musb *musb);
514 static inline void musb_platform_set_vbus(struct musb *musb, int is_on)
516 if (musb->ops->set_vbus)
517 musb->ops->set_vbus(musb, is_on);
521 static inline void musb_platform_enable(struct musb *musb)
523 if (musb->ops->enable)
524 musb->ops->enable(musb);
527 static inline int musb_platform_enable(struct musb *musb)
529 if (!musb->ops->enable)
532 return musb->ops->enable(musb);
536 static inline void musb_platform_disable(struct musb *musb)
538 if (musb->ops->disable)
539 musb->ops->disable(musb);
542 static inline int musb_platform_set_mode(struct musb *musb, u8 mode)
544 if (!musb->ops->set_mode)
547 return musb->ops->set_mode(musb, mode);
550 static inline void musb_platform_try_idle(struct musb *musb,
551 unsigned long timeout)
553 if (musb->ops->try_idle)
554 musb->ops->try_idle(musb, timeout);
557 static inline int musb_platform_get_vbus_status(struct musb *musb)
559 if (!musb->ops->vbus_status)
562 return musb->ops->vbus_status(musb);
565 static inline int musb_platform_init(struct musb *musb)
567 if (!musb->ops->init)
570 return musb->ops->init(musb);
573 static inline int musb_platform_exit(struct musb *musb)
575 if (!musb->ops->exit)
578 return musb->ops->exit(musb);
583 musb_init_controller(struct musb_hdrc_platform_data *plat, struct device *dev,
586 #endif /* __MUSB_CORE_H__ */