2 * Driver for the NXP ISP1760 chip
4 * However, the code might contain some bugs. What doesn't work for sure is:
7 e The interrupt line is configured as active low, level.
9 * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
11 * (c) 2011 Arvid Brodin <arvid.brodin@enea.com>
14 #include <linux/gpio/consumer.h>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/list.h>
19 #include <linux/usb.h>
20 #include <linux/usb/hcd.h>
21 #include <linux/debugfs.h>
22 #include <linux/uaccess.h>
25 #include <linux/timer.h>
26 #include <asm/unaligned.h>
27 #include <asm/cacheflush.h>
29 #include "isp1760-hcd.h"
31 static struct kmem_cache
*qtd_cachep
;
32 static struct kmem_cache
*qh_cachep
;
33 static struct kmem_cache
*urb_listitem_cachep
;
35 enum queue_head_types
{
45 struct slotinfo atl_slots
[32];
47 struct slotinfo int_slots
[32];
49 struct memory_chunk memory_pool
[BLOCKS
];
50 struct list_head qh_list
[QH_END
];
52 /* periodic schedule support */
53 #define DEFAULT_I_TDPS 1024
54 unsigned periodic_size
;
56 unsigned long reset_done
;
57 unsigned long next_statechange
;
58 unsigned int devflags
;
60 struct gpio_desc
*rst_gpio
;
63 static inline struct isp1760_hcd
*hcd_to_priv(struct usb_hcd
*hcd
)
65 return (struct isp1760_hcd
*) (hcd
->hcd_priv
);
68 /* Section 2.2 Host Controller Capability Registers */
69 #define HC_LENGTH(p) (((p)>>00)&0x00ff) /* bits 7:0 */
70 #define HC_VERSION(p) (((p)>>16)&0xffff) /* bits 31:16 */
71 #define HCS_INDICATOR(p) ((p)&(1 << 16)) /* true: has port indicators */
72 #define HCS_PPC(p) ((p)&(1 << 4)) /* true: port power control */
73 #define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */
74 #define HCC_ISOC_CACHE(p) ((p)&(1 << 7)) /* true: can cache isoc frame */
75 #define HCC_ISOC_THRES(p) (((p)>>4)&0x7) /* bits 6:4, uframes cached */
77 /* Section 2.3 Host Controller Operational Registers */
78 #define CMD_LRESET (1<<7) /* partial reset (no ports, etc) */
79 #define CMD_RESET (1<<1) /* reset HC not bus */
80 #define CMD_RUN (1<<0) /* start/stop HC */
81 #define STS_PCD (1<<2) /* port change detect */
82 #define FLAG_CF (1<<0) /* true: we'll support "high speed" */
84 #define PORT_OWNER (1<<13) /* true: companion hc owns this port */
85 #define PORT_POWER (1<<12) /* true: has power (see PPC) */
86 #define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10)) /* USB 1.1 device */
87 #define PORT_RESET (1<<8) /* reset port */
88 #define PORT_SUSPEND (1<<7) /* suspend port */
89 #define PORT_RESUME (1<<6) /* resume it */
90 #define PORT_PE (1<<2) /* port enable */
91 #define PORT_CSC (1<<1) /* connect status change */
92 #define PORT_CONNECT (1<<0) /* device connected */
93 #define PORT_RWC_BITS (PORT_CSC)
100 /* the rest is HCD-private */
101 struct list_head qtd_list
;
104 size_t actual_length
;
106 /* QTD_ENQUEUED: waiting for transfer (inactive) */
107 /* QTD_PAYLOAD_ALLOC: chip mem has been allocated for payload */
108 /* QTD_XFER_STARTED: valid ptd has been written to isp176x - only
109 interrupt handler may touch this qtd! */
110 /* QTD_XFER_COMPLETE: payload has been transferred successfully */
111 /* QTD_RETIRE: transfer error/abort qtd */
112 #define QTD_ENQUEUED 0
113 #define QTD_PAYLOAD_ALLOC 1
114 #define QTD_XFER_STARTED 2
115 #define QTD_XFER_COMPLETE 3
120 /* Queue head, one for each active endpoint */
122 struct list_head qh_list
;
123 struct list_head qtd_list
;
127 int tt_buffer_dirty
; /* See USB2.0 spec section 11.17.5 */
130 struct urb_listitem
{
131 struct list_head urb_list
;
136 * Access functions for isp176x registers (addresses 0..0x03FF).
138 static u32
reg_read32(void __iomem
*base
, u32 reg
)
140 return readl(base
+ reg
);
143 static void reg_write32(void __iomem
*base
, u32 reg
, u32 val
)
145 writel(val
, base
+ reg
);
149 * Access functions for isp176x memory (offset >= 0x0400).
151 * bank_reads8() reads memory locations prefetched by an earlier write to
152 * HC_MEMORY_REG (see isp176x datasheet). Unless you want to do fancy multi-
153 * bank optimizations, you should use the more generic mem_reads8() below.
155 * For access to ptd memory, use the specialized ptd_read() and ptd_write()
158 * These functions copy via MMIO data to/from the device. memcpy_{to|from}io()
159 * doesn't quite work because some people have to enforce 32-bit access
161 static void bank_reads8(void __iomem
*src_base
, u32 src_offset
, u32 bank_addr
,
162 __u32
*dst
, u32 bytes
)
169 src
= src_base
+ (bank_addr
| src_offset
);
171 if (src_offset
< PAYLOAD_OFFSET
) {
173 *dst
= le32_to_cpu(__raw_readl(src
));
180 *dst
= __raw_readl(src
);
190 /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
193 if (src_offset
< PAYLOAD_OFFSET
)
194 val
= le32_to_cpu(__raw_readl(src
));
196 val
= __raw_readl(src
);
198 dst_byteptr
= (void *) dst
;
199 src_byteptr
= (void *) &val
;
201 *dst_byteptr
= *src_byteptr
;
208 static void mem_reads8(void __iomem
*src_base
, u32 src_offset
, void *dst
,
211 reg_write32(src_base
, HC_MEMORY_REG
, src_offset
+ ISP_BANK(0));
213 bank_reads8(src_base
, src_offset
, ISP_BANK(0), dst
, bytes
);
216 static void mem_writes8(void __iomem
*dst_base
, u32 dst_offset
,
217 __u32
const *src
, u32 bytes
)
221 dst
= dst_base
+ dst_offset
;
223 if (dst_offset
< PAYLOAD_OFFSET
) {
225 __raw_writel(cpu_to_le32(*src
), dst
);
232 __raw_writel(*src
, dst
);
241 /* in case we have 3, 2 or 1 bytes left. The buffer is allocated and the
242 * extra bytes should not be read by the HW.
245 if (dst_offset
< PAYLOAD_OFFSET
)
246 __raw_writel(cpu_to_le32(*src
), dst
);
248 __raw_writel(*src
, dst
);
252 * Read and write ptds. 'ptd_offset' should be one of ISO_PTD_OFFSET,
253 * INT_PTD_OFFSET, and ATL_PTD_OFFSET. 'slot' should be less than 32.
255 static void ptd_read(void __iomem
*base
, u32 ptd_offset
, u32 slot
,
258 reg_write32(base
, HC_MEMORY_REG
,
259 ISP_BANK(0) + ptd_offset
+ slot
*sizeof(*ptd
));
261 bank_reads8(base
, ptd_offset
+ slot
*sizeof(*ptd
), ISP_BANK(0),
262 (void *) ptd
, sizeof(*ptd
));
265 static void ptd_write(void __iomem
*base
, u32 ptd_offset
, u32 slot
,
268 mem_writes8(base
, ptd_offset
+ slot
*sizeof(*ptd
) + sizeof(ptd
->dw0
),
269 &ptd
->dw1
, 7*sizeof(ptd
->dw1
));
270 /* Make sure dw0 gets written last (after other dw's and after payload)
271 since it contains the enable bit */
273 mem_writes8(base
, ptd_offset
+ slot
*sizeof(*ptd
), &ptd
->dw0
,
278 /* memory management of the 60kb on the chip from 0x1000 to 0xffff */
279 static void init_memory(struct isp1760_hcd
*priv
)
284 payload_addr
= PAYLOAD_OFFSET
;
285 for (i
= 0; i
< BLOCK_1_NUM
; i
++) {
286 priv
->memory_pool
[i
].start
= payload_addr
;
287 priv
->memory_pool
[i
].size
= BLOCK_1_SIZE
;
288 priv
->memory_pool
[i
].free
= 1;
289 payload_addr
+= priv
->memory_pool
[i
].size
;
293 for (i
= 0; i
< BLOCK_2_NUM
; i
++) {
294 priv
->memory_pool
[curr
+ i
].start
= payload_addr
;
295 priv
->memory_pool
[curr
+ i
].size
= BLOCK_2_SIZE
;
296 priv
->memory_pool
[curr
+ i
].free
= 1;
297 payload_addr
+= priv
->memory_pool
[curr
+ i
].size
;
301 for (i
= 0; i
< BLOCK_3_NUM
; i
++) {
302 priv
->memory_pool
[curr
+ i
].start
= payload_addr
;
303 priv
->memory_pool
[curr
+ i
].size
= BLOCK_3_SIZE
;
304 priv
->memory_pool
[curr
+ i
].free
= 1;
305 payload_addr
+= priv
->memory_pool
[curr
+ i
].size
;
308 WARN_ON(payload_addr
- priv
->memory_pool
[0].start
> PAYLOAD_AREA_SIZE
);
311 static void alloc_mem(struct usb_hcd
*hcd
, struct isp1760_qtd
*qtd
)
313 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
316 WARN_ON(qtd
->payload_addr
);
321 for (i
= 0; i
< BLOCKS
; i
++) {
322 if (priv
->memory_pool
[i
].size
>= qtd
->length
&&
323 priv
->memory_pool
[i
].free
) {
324 priv
->memory_pool
[i
].free
= 0;
325 qtd
->payload_addr
= priv
->memory_pool
[i
].start
;
331 static void free_mem(struct usb_hcd
*hcd
, struct isp1760_qtd
*qtd
)
333 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
336 if (!qtd
->payload_addr
)
339 for (i
= 0; i
< BLOCKS
; i
++) {
340 if (priv
->memory_pool
[i
].start
== qtd
->payload_addr
) {
341 WARN_ON(priv
->memory_pool
[i
].free
);
342 priv
->memory_pool
[i
].free
= 1;
343 qtd
->payload_addr
= 0;
348 dev_err(hcd
->self
.controller
, "%s: Invalid pointer: %08x\n",
349 __func__
, qtd
->payload_addr
);
351 qtd
->payload_addr
= 0;
354 static int handshake(struct usb_hcd
*hcd
, u32 reg
,
355 u32 mask
, u32 done
, int usec
)
360 result
= reg_read32(hcd
->regs
, reg
);
372 /* reset a non-running (STS_HALT == 1) controller */
373 static int ehci_reset(struct usb_hcd
*hcd
)
376 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
378 u32 command
= reg_read32(hcd
->regs
, HC_USBCMD
);
380 command
|= CMD_RESET
;
381 reg_write32(hcd
->regs
, HC_USBCMD
, command
);
382 hcd
->state
= HC_STATE_HALT
;
383 priv
->next_statechange
= jiffies
;
384 retval
= handshake(hcd
, HC_USBCMD
,
385 CMD_RESET
, 0, 250 * 1000);
389 static struct isp1760_qh
*qh_alloc(gfp_t flags
)
391 struct isp1760_qh
*qh
;
393 qh
= kmem_cache_zalloc(qh_cachep
, flags
);
397 INIT_LIST_HEAD(&qh
->qh_list
);
398 INIT_LIST_HEAD(&qh
->qtd_list
);
404 static void qh_free(struct isp1760_qh
*qh
)
406 WARN_ON(!list_empty(&qh
->qtd_list
));
407 WARN_ON(qh
->slot
> -1);
408 kmem_cache_free(qh_cachep
, qh
);
411 /* one-time init, only for memory state */
412 static int priv_init(struct usb_hcd
*hcd
)
414 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
418 spin_lock_init(&priv
->lock
);
420 for (i
= 0; i
< QH_END
; i
++)
421 INIT_LIST_HEAD(&priv
->qh_list
[i
]);
424 * hw default: 1K periodic list heads, one per frame.
425 * periodic_size can shrink by USBCMD update if hcc_params allows.
427 priv
->periodic_size
= DEFAULT_I_TDPS
;
429 /* controllers may cache some of the periodic schedule ... */
430 hcc_params
= reg_read32(hcd
->regs
, HC_HCCPARAMS
);
431 /* full frame cache */
432 if (HCC_ISOC_CACHE(hcc_params
))
434 else /* N microframes cached */
435 priv
->i_thresh
= 2 + HCC_ISOC_THRES(hcc_params
);
440 static int isp1760_hc_setup(struct usb_hcd
*hcd
)
442 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
446 /* low-level chip reset */
447 if (priv
->rst_gpio
) {
448 gpiod_set_value_cansleep(priv
->rst_gpio
, 1);
450 gpiod_set_value_cansleep(priv
->rst_gpio
, 0);
453 /* Setup HW Mode Control: This assumes a level active-low interrupt */
454 hwmode
= HW_DATA_BUS_32BIT
;
456 if (priv
->devflags
& ISP1760_FLAG_BUS_WIDTH_16
)
457 hwmode
&= ~HW_DATA_BUS_32BIT
;
458 if (priv
->devflags
& ISP1760_FLAG_ANALOG_OC
)
459 hwmode
|= HW_ANA_DIGI_OC
;
460 if (priv
->devflags
& ISP1760_FLAG_DACK_POL_HIGH
)
461 hwmode
|= HW_DACK_POL_HIGH
;
462 if (priv
->devflags
& ISP1760_FLAG_DREQ_POL_HIGH
)
463 hwmode
|= HW_DREQ_POL_HIGH
;
464 if (priv
->devflags
& ISP1760_FLAG_INTR_POL_HIGH
)
465 hwmode
|= HW_INTR_HIGH_ACT
;
466 if (priv
->devflags
& ISP1760_FLAG_INTR_EDGE_TRIG
)
467 hwmode
|= HW_INTR_EDGE_TRIG
;
470 * We have to set this first in case we're in 16-bit mode.
471 * Write it twice to ensure correct upper bits if switching
474 reg_write32(hcd
->regs
, HC_HW_MODE_CTRL
, hwmode
);
475 reg_write32(hcd
->regs
, HC_HW_MODE_CTRL
, hwmode
);
477 reg_write32(hcd
->regs
, HC_SCRATCH_REG
, 0xdeadbabe);
478 /* Change bus pattern */
479 scratch
= reg_read32(hcd
->regs
, HC_CHIP_ID_REG
);
480 scratch
= reg_read32(hcd
->regs
, HC_SCRATCH_REG
);
481 if (scratch
!= 0xdeadbabe) {
482 dev_err(hcd
->self
.controller
, "Scratch test failed.\n");
487 reg_write32(hcd
->regs
, HC_BUFFER_STATUS_REG
, 0);
488 reg_write32(hcd
->regs
, HC_ATL_PTD_SKIPMAP_REG
, NO_TRANSFER_ACTIVE
);
489 reg_write32(hcd
->regs
, HC_INT_PTD_SKIPMAP_REG
, NO_TRANSFER_ACTIVE
);
490 reg_write32(hcd
->regs
, HC_ISO_PTD_SKIPMAP_REG
, NO_TRANSFER_ACTIVE
);
493 reg_write32(hcd
->regs
, HC_RESET_REG
, SW_RESET_RESET_ALL
);
496 reg_write32(hcd
->regs
, HC_RESET_REG
, SW_RESET_RESET_HC
);
499 result
= ehci_reset(hcd
);
505 dev_info(hcd
->self
.controller
, "bus width: %d, oc: %s\n",
506 (priv
->devflags
& ISP1760_FLAG_BUS_WIDTH_16
) ?
507 16 : 32, (priv
->devflags
& ISP1760_FLAG_ANALOG_OC
) ?
508 "analog" : "digital");
511 reg_write32(hcd
->regs
, HC_HW_MODE_CTRL
, hwmode
| ALL_ATX_RESET
);
513 reg_write32(hcd
->regs
, HC_HW_MODE_CTRL
, hwmode
);
515 reg_write32(hcd
->regs
, HC_INTERRUPT_ENABLE
, INTERRUPT_ENABLE_MASK
);
518 * PORT 1 Control register of the ISP1760 is the OTG control
519 * register on ISP1761. Since there is no OTG or device controller
520 * support in this driver, we use port 1 as a "normal" USB host port on
523 reg_write32(hcd
->regs
, HC_PORT1_CTRL
, PORT1_POWER
| PORT1_INIT2
);
526 priv
->hcs_params
= reg_read32(hcd
->regs
, HC_HCSPARAMS
);
528 return priv_init(hcd
);
531 static u32
base_to_chip(u32 base
)
533 return ((base
- 0x400) >> 3);
536 static int last_qtd_of_urb(struct isp1760_qtd
*qtd
, struct isp1760_qh
*qh
)
540 if (list_is_last(&qtd
->qtd_list
, &qh
->qtd_list
))
544 qtd
= list_entry(qtd
->qtd_list
.next
, typeof(*qtd
), qtd_list
);
545 return (qtd
->urb
!= urb
);
548 /* magic numbers that can affect system performance */
549 #define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */
550 #define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */
551 #define EHCI_TUNE_RL_TT 0
552 #define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */
553 #define EHCI_TUNE_MULT_TT 1
554 #define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */
556 static void create_ptd_atl(struct isp1760_qh
*qh
,
557 struct isp1760_qtd
*qtd
, struct ptd
*ptd
)
562 u32 nak
= NAK_COUNTER
;
564 memset(ptd
, 0, sizeof(*ptd
));
566 /* according to 3.6.2, max packet len can not be > 0x400 */
567 maxpacket
= usb_maxpacket(qtd
->urb
->dev
, qtd
->urb
->pipe
,
568 usb_pipeout(qtd
->urb
->pipe
));
569 multi
= 1 + ((maxpacket
>> 11) & 0x3);
573 ptd
->dw0
= DW0_VALID_BIT
;
574 ptd
->dw0
|= TO_DW0_LENGTH(qtd
->length
);
575 ptd
->dw0
|= TO_DW0_MAXPACKET(maxpacket
);
576 ptd
->dw0
|= TO_DW0_ENDPOINT(usb_pipeendpoint(qtd
->urb
->pipe
));
579 ptd
->dw1
= usb_pipeendpoint(qtd
->urb
->pipe
) >> 1;
580 ptd
->dw1
|= TO_DW1_DEVICE_ADDR(usb_pipedevice(qtd
->urb
->pipe
));
581 ptd
->dw1
|= TO_DW1_PID_TOKEN(qtd
->packet_type
);
583 if (usb_pipebulk(qtd
->urb
->pipe
))
584 ptd
->dw1
|= DW1_TRANS_BULK
;
585 else if (usb_pipeint(qtd
->urb
->pipe
))
586 ptd
->dw1
|= DW1_TRANS_INT
;
588 if (qtd
->urb
->dev
->speed
!= USB_SPEED_HIGH
) {
589 /* split transaction */
591 ptd
->dw1
|= DW1_TRANS_SPLIT
;
592 if (qtd
->urb
->dev
->speed
== USB_SPEED_LOW
)
593 ptd
->dw1
|= DW1_SE_USB_LOSPEED
;
595 ptd
->dw1
|= TO_DW1_PORT_NUM(qtd
->urb
->dev
->ttport
);
596 ptd
->dw1
|= TO_DW1_HUB_NUM(qtd
->urb
->dev
->tt
->hub
->devnum
);
598 /* SE bit for Split INT transfers */
599 if (usb_pipeint(qtd
->urb
->pipe
) &&
600 (qtd
->urb
->dev
->speed
== USB_SPEED_LOW
))
606 ptd
->dw0
|= TO_DW0_MULTI(multi
);
607 if (usb_pipecontrol(qtd
->urb
->pipe
) ||
608 usb_pipebulk(qtd
->urb
->pipe
))
609 ptd
->dw3
|= TO_DW3_PING(qh
->ping
);
613 ptd
->dw2
|= TO_DW2_DATA_START_ADDR(base_to_chip(qtd
->payload_addr
));
614 ptd
->dw2
|= TO_DW2_RL(rl
);
617 ptd
->dw3
|= TO_DW3_NAKCOUNT(nak
);
618 ptd
->dw3
|= TO_DW3_DATA_TOGGLE(qh
->toggle
);
619 if (usb_pipecontrol(qtd
->urb
->pipe
)) {
620 if (qtd
->data_buffer
== qtd
->urb
->setup_packet
)
621 ptd
->dw3
&= ~TO_DW3_DATA_TOGGLE(1);
622 else if (last_qtd_of_urb(qtd
, qh
))
623 ptd
->dw3
|= TO_DW3_DATA_TOGGLE(1);
626 ptd
->dw3
|= DW3_ACTIVE_BIT
;
628 ptd
->dw3
|= TO_DW3_CERR(ERR_COUNTER
);
631 static void transform_add_int(struct isp1760_qh
*qh
,
632 struct isp1760_qtd
*qtd
, struct ptd
*ptd
)
638 * Most of this is guessing. ISP1761 datasheet is quite unclear, and
639 * the algorithm from the original Philips driver code, which was
640 * pretty much used in this driver before as well, is quite horrendous
641 * and, i believe, incorrect. The code below follows the datasheet and
642 * USB2.0 spec as far as I can tell, and plug/unplug seems to be much
643 * more reliable this way (fingers crossed...).
646 if (qtd
->urb
->dev
->speed
== USB_SPEED_HIGH
) {
647 /* urb->interval is in units of microframes (1/8 ms) */
648 period
= qtd
->urb
->interval
>> 3;
650 if (qtd
->urb
->interval
> 4)
651 usof
= 0x01; /* One bit set =>
652 interval 1 ms * uFrame-match */
653 else if (qtd
->urb
->interval
> 2)
654 usof
= 0x22; /* Two bits set => interval 1/2 ms */
655 else if (qtd
->urb
->interval
> 1)
656 usof
= 0x55; /* Four bits set => interval 1/4 ms */
658 usof
= 0xff; /* All bits set => interval 1/8 ms */
660 /* urb->interval is in units of frames (1 ms) */
661 period
= qtd
->urb
->interval
;
662 usof
= 0x0f; /* Execute Start Split on any of the
663 four first uFrames */
666 * First 8 bits in dw5 is uSCS and "specifies which uSOF the
667 * complete split needs to be sent. Valid only for IN." Also,
668 * "All bits can be set to one for every transfer." (p 82,
669 * ISP1761 data sheet.) 0x1c is from Philips driver. Where did
670 * that number come from? 0xff seems to work fine...
672 /* ptd->dw5 = 0x1c; */
673 ptd
->dw5
= 0xff; /* Execute Complete Split on any uFrame */
676 period
= period
>> 1;/* Ensure equal or shorter period than requested */
677 period
&= 0xf8; /* Mask off too large values and lowest unused 3 bits */
683 static void create_ptd_int(struct isp1760_qh
*qh
,
684 struct isp1760_qtd
*qtd
, struct ptd
*ptd
)
686 create_ptd_atl(qh
, qtd
, ptd
);
687 transform_add_int(qh
, qtd
, ptd
);
690 static void isp1760_urb_done(struct usb_hcd
*hcd
, struct urb
*urb
)
691 __releases(priv
->lock
)
692 __acquires(priv
->lock
)
694 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
696 if (!urb
->unlinked
) {
697 if (urb
->status
== -EINPROGRESS
)
701 if (usb_pipein(urb
->pipe
) && usb_pipetype(urb
->pipe
) != PIPE_CONTROL
) {
703 for (ptr
= urb
->transfer_buffer
;
704 ptr
< urb
->transfer_buffer
+ urb
->transfer_buffer_length
;
706 flush_dcache_page(virt_to_page(ptr
));
709 /* complete() can reenter this HCD */
710 usb_hcd_unlink_urb_from_ep(hcd
, urb
);
711 spin_unlock(&priv
->lock
);
712 usb_hcd_giveback_urb(hcd
, urb
, urb
->status
);
713 spin_lock(&priv
->lock
);
716 static struct isp1760_qtd
*qtd_alloc(gfp_t flags
, struct urb
*urb
,
719 struct isp1760_qtd
*qtd
;
721 qtd
= kmem_cache_zalloc(qtd_cachep
, flags
);
725 INIT_LIST_HEAD(&qtd
->qtd_list
);
727 qtd
->packet_type
= packet_type
;
728 qtd
->status
= QTD_ENQUEUED
;
729 qtd
->actual_length
= 0;
734 static void qtd_free(struct isp1760_qtd
*qtd
)
736 WARN_ON(qtd
->payload_addr
);
737 kmem_cache_free(qtd_cachep
, qtd
);
740 static void start_bus_transfer(struct usb_hcd
*hcd
, u32 ptd_offset
, int slot
,
741 struct slotinfo
*slots
, struct isp1760_qtd
*qtd
,
742 struct isp1760_qh
*qh
, struct ptd
*ptd
)
744 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
747 WARN_ON((slot
< 0) || (slot
> 31));
748 WARN_ON(qtd
->length
&& !qtd
->payload_addr
);
749 WARN_ON(slots
[slot
].qtd
);
750 WARN_ON(slots
[slot
].qh
);
751 WARN_ON(qtd
->status
!= QTD_PAYLOAD_ALLOC
);
753 /* Make sure done map has not triggered from some unlinked transfer */
754 if (ptd_offset
== ATL_PTD_OFFSET
) {
755 priv
->atl_done_map
|= reg_read32(hcd
->regs
,
756 HC_ATL_PTD_DONEMAP_REG
);
757 priv
->atl_done_map
&= ~(1 << slot
);
759 priv
->int_done_map
|= reg_read32(hcd
->regs
,
760 HC_INT_PTD_DONEMAP_REG
);
761 priv
->int_done_map
&= ~(1 << slot
);
765 qtd
->status
= QTD_XFER_STARTED
;
766 slots
[slot
].timestamp
= jiffies
;
767 slots
[slot
].qtd
= qtd
;
769 ptd_write(hcd
->regs
, ptd_offset
, slot
, ptd
);
771 if (ptd_offset
== ATL_PTD_OFFSET
) {
772 skip_map
= reg_read32(hcd
->regs
, HC_ATL_PTD_SKIPMAP_REG
);
773 skip_map
&= ~(1 << qh
->slot
);
774 reg_write32(hcd
->regs
, HC_ATL_PTD_SKIPMAP_REG
, skip_map
);
776 skip_map
= reg_read32(hcd
->regs
, HC_INT_PTD_SKIPMAP_REG
);
777 skip_map
&= ~(1 << qh
->slot
);
778 reg_write32(hcd
->regs
, HC_INT_PTD_SKIPMAP_REG
, skip_map
);
782 static int is_short_bulk(struct isp1760_qtd
*qtd
)
784 return (usb_pipebulk(qtd
->urb
->pipe
) &&
785 (qtd
->actual_length
< qtd
->length
));
788 static void collect_qtds(struct usb_hcd
*hcd
, struct isp1760_qh
*qh
,
789 struct list_head
*urb_list
)
792 struct isp1760_qtd
*qtd
, *qtd_next
;
793 struct urb_listitem
*urb_listitem
;
795 list_for_each_entry_safe(qtd
, qtd_next
, &qh
->qtd_list
, qtd_list
) {
796 if (qtd
->status
< QTD_XFER_COMPLETE
)
799 last_qtd
= last_qtd_of_urb(qtd
, qh
);
801 if ((!last_qtd
) && (qtd
->status
== QTD_RETIRE
))
802 qtd_next
->status
= QTD_RETIRE
;
804 if (qtd
->status
== QTD_XFER_COMPLETE
) {
805 if (qtd
->actual_length
) {
806 switch (qtd
->packet_type
) {
808 mem_reads8(hcd
->regs
, qtd
->payload_addr
,
811 /* Fall through (?) */
813 qtd
->urb
->actual_length
+=
815 /* Fall through ... */
821 if (is_short_bulk(qtd
)) {
822 if (qtd
->urb
->transfer_flags
& URB_SHORT_NOT_OK
)
823 qtd
->urb
->status
= -EREMOTEIO
;
825 qtd_next
->status
= QTD_RETIRE
;
829 if (qtd
->payload_addr
)
833 if ((qtd
->status
== QTD_RETIRE
) &&
834 (qtd
->urb
->status
== -EINPROGRESS
))
835 qtd
->urb
->status
= -EPIPE
;
836 /* Defer calling of urb_done() since it releases lock */
837 urb_listitem
= kmem_cache_zalloc(urb_listitem_cachep
,
839 if (unlikely(!urb_listitem
))
840 break; /* Try again on next call */
841 urb_listitem
->urb
= qtd
->urb
;
842 list_add_tail(&urb_listitem
->urb_list
, urb_list
);
845 list_del(&qtd
->qtd_list
);
850 #define ENQUEUE_DEPTH 2
851 static void enqueue_qtds(struct usb_hcd
*hcd
, struct isp1760_qh
*qh
)
853 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
855 struct slotinfo
*slots
;
856 int curr_slot
, free_slot
;
859 struct isp1760_qtd
*qtd
;
861 if (unlikely(list_empty(&qh
->qtd_list
))) {
866 /* Make sure this endpoint's TT buffer is clean before queueing ptds */
867 if (qh
->tt_buffer_dirty
)
870 if (usb_pipeint(list_entry(qh
->qtd_list
.next
, struct isp1760_qtd
,
871 qtd_list
)->urb
->pipe
)) {
872 ptd_offset
= INT_PTD_OFFSET
;
873 slots
= priv
->int_slots
;
875 ptd_offset
= ATL_PTD_OFFSET
;
876 slots
= priv
->atl_slots
;
880 for (curr_slot
= 0; curr_slot
< 32; curr_slot
++) {
881 if ((free_slot
== -1) && (slots
[curr_slot
].qtd
== NULL
))
882 free_slot
= curr_slot
;
883 if (slots
[curr_slot
].qh
== qh
)
888 list_for_each_entry(qtd
, &qh
->qtd_list
, qtd_list
) {
889 if (qtd
->status
== QTD_ENQUEUED
) {
890 WARN_ON(qtd
->payload_addr
);
892 if ((qtd
->length
) && (!qtd
->payload_addr
))
896 ((qtd
->packet_type
== SETUP_PID
) ||
897 (qtd
->packet_type
== OUT_PID
))) {
898 mem_writes8(hcd
->regs
, qtd
->payload_addr
,
899 qtd
->data_buffer
, qtd
->length
);
902 qtd
->status
= QTD_PAYLOAD_ALLOC
;
905 if (qtd
->status
== QTD_PAYLOAD_ALLOC
) {
907 if ((curr_slot > 31) && (free_slot == -1))
908 dev_dbg(hcd->self.controller, "%s: No slot "
909 "available for transfer\n", __func__);
911 /* Start xfer for this endpoint if not already done */
912 if ((curr_slot
> 31) && (free_slot
> -1)) {
913 if (usb_pipeint(qtd
->urb
->pipe
))
914 create_ptd_int(qh
, qtd
, &ptd
);
916 create_ptd_atl(qh
, qtd
, &ptd
);
918 start_bus_transfer(hcd
, ptd_offset
, free_slot
,
919 slots
, qtd
, qh
, &ptd
);
920 curr_slot
= free_slot
;
924 if (n
>= ENQUEUE_DEPTH
)
930 static void schedule_ptds(struct usb_hcd
*hcd
)
932 struct isp1760_hcd
*priv
;
933 struct isp1760_qh
*qh
, *qh_next
;
934 struct list_head
*ep_queue
;
936 struct urb_listitem
*urb_listitem
, *urb_listitem_next
;
944 priv
= hcd_to_priv(hcd
);
947 * check finished/retired xfers, transfer payloads, call urb_done()
949 for (i
= 0; i
< QH_END
; i
++) {
950 ep_queue
= &priv
->qh_list
[i
];
951 list_for_each_entry_safe(qh
, qh_next
, ep_queue
, qh_list
) {
952 collect_qtds(hcd
, qh
, &urb_list
);
953 if (list_empty(&qh
->qtd_list
))
954 list_del(&qh
->qh_list
);
958 list_for_each_entry_safe(urb_listitem
, urb_listitem_next
, &urb_list
,
960 isp1760_urb_done(hcd
, urb_listitem
->urb
);
961 kmem_cache_free(urb_listitem_cachep
, urb_listitem
);
965 * Schedule packets for transfer.
967 * According to USB2.0 specification:
969 * 1st prio: interrupt xfers, up to 80 % of bandwidth
970 * 2nd prio: control xfers
971 * 3rd prio: bulk xfers
973 * ... but let's use a simpler scheme here (mostly because ISP1761 doc
974 * is very unclear on how to prioritize traffic):
976 * 1) Enqueue any queued control transfers, as long as payload chip mem
977 * and PTD ATL slots are available.
978 * 2) Enqueue any queued INT transfers, as long as payload chip mem
979 * and PTD INT slots are available.
980 * 3) Enqueue any queued bulk transfers, as long as payload chip mem
981 * and PTD ATL slots are available.
983 * Use double buffering (ENQUEUE_DEPTH==2) as a compromise between
984 * conservation of chip mem and performance.
986 * I'm sure this scheme could be improved upon!
988 for (i
= 0; i
< QH_END
; i
++) {
989 ep_queue
= &priv
->qh_list
[i
];
990 list_for_each_entry_safe(qh
, qh_next
, ep_queue
, qh_list
)
991 enqueue_qtds(hcd
, qh
);
995 #define PTD_STATE_QTD_DONE 1
996 #define PTD_STATE_QTD_RELOAD 2
997 #define PTD_STATE_URB_RETIRE 3
999 static int check_int_transfer(struct usb_hcd
*hcd
, struct ptd
*ptd
,
1008 /* FIXME: ISP1761 datasheet does not say what to do with these. Do we
1009 need to handle these errors? Is it done in hardware? */
1011 if (ptd
->dw3
& DW3_HALT_BIT
) {
1013 urb
->status
= -EPROTO
; /* Default unknown error */
1015 for (i
= 0; i
< 8; i
++) {
1016 switch (dw4
& 0x7) {
1018 dev_dbg(hcd
->self
.controller
, "%s: underrun "
1019 "during uFrame %d\n",
1021 urb
->status
= -ECOMM
; /* Could not write data */
1024 dev_dbg(hcd
->self
.controller
, "%s: transaction "
1025 "error during uFrame %d\n",
1027 urb
->status
= -EPROTO
; /* timeout, bad CRC, PID
1031 dev_dbg(hcd
->self
.controller
, "%s: babble "
1032 "error during uFrame %d\n",
1034 urb
->status
= -EOVERFLOW
;
1040 return PTD_STATE_URB_RETIRE
;
1043 return PTD_STATE_QTD_DONE
;
1046 static int check_atl_transfer(struct usb_hcd
*hcd
, struct ptd
*ptd
,
1050 if (ptd
->dw3
& DW3_HALT_BIT
) {
1051 if (ptd
->dw3
& DW3_BABBLE_BIT
)
1052 urb
->status
= -EOVERFLOW
;
1053 else if (FROM_DW3_CERR(ptd
->dw3
))
1054 urb
->status
= -EPIPE
; /* Stall */
1055 else if (ptd
->dw3
& DW3_ERROR_BIT
)
1056 urb
->status
= -EPROTO
; /* XactErr */
1058 urb
->status
= -EPROTO
; /* Unknown */
1060 dev_dbg(hcd->self.controller, "%s: ptd error:\n"
1061 " dw0: %08x dw1: %08x dw2: %08x dw3: %08x\n"
1062 " dw4: %08x dw5: %08x dw6: %08x dw7: %08x\n",
1064 ptd->dw0, ptd->dw1, ptd->dw2, ptd->dw3,
1065 ptd->dw4, ptd->dw5, ptd->dw6, ptd->dw7);
1067 return PTD_STATE_URB_RETIRE
;
1070 if ((ptd
->dw3
& DW3_ERROR_BIT
) && (ptd
->dw3
& DW3_ACTIVE_BIT
)) {
1071 /* Transfer Error, *but* active and no HALT -> reload */
1072 dev_dbg(hcd
->self
.controller
, "PID error; reloading ptd\n");
1073 return PTD_STATE_QTD_RELOAD
;
1076 if (!FROM_DW3_NAKCOUNT(ptd
->dw3
) && (ptd
->dw3
& DW3_ACTIVE_BIT
)) {
1078 * NAKs are handled in HW by the chip. Usually if the
1079 * device is not able to send data fast enough.
1080 * This happens mostly on slower hardware.
1082 return PTD_STATE_QTD_RELOAD
;
1085 return PTD_STATE_QTD_DONE
;
1088 static void handle_done_ptds(struct usb_hcd
*hcd
)
1090 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
1092 struct isp1760_qh
*qh
;
1095 struct slotinfo
*slots
;
1097 struct isp1760_qtd
*qtd
;
1101 skip_map
= reg_read32(hcd
->regs
, HC_INT_PTD_SKIPMAP_REG
);
1102 priv
->int_done_map
&= ~skip_map
;
1103 skip_map
= reg_read32(hcd
->regs
, HC_ATL_PTD_SKIPMAP_REG
);
1104 priv
->atl_done_map
&= ~skip_map
;
1106 modified
= priv
->int_done_map
|| priv
->atl_done_map
;
1108 while (priv
->int_done_map
|| priv
->atl_done_map
) {
1109 if (priv
->int_done_map
) {
1111 slot
= __ffs(priv
->int_done_map
);
1112 priv
->int_done_map
&= ~(1 << slot
);
1113 slots
= priv
->int_slots
;
1114 /* This should not trigger, and could be removed if
1115 noone have any problems with it triggering: */
1116 if (!slots
[slot
].qh
) {
1120 ptd_offset
= INT_PTD_OFFSET
;
1121 ptd_read(hcd
->regs
, INT_PTD_OFFSET
, slot
, &ptd
);
1122 state
= check_int_transfer(hcd
, &ptd
,
1123 slots
[slot
].qtd
->urb
);
1126 slot
= __ffs(priv
->atl_done_map
);
1127 priv
->atl_done_map
&= ~(1 << slot
);
1128 slots
= priv
->atl_slots
;
1129 /* This should not trigger, and could be removed if
1130 noone have any problems with it triggering: */
1131 if (!slots
[slot
].qh
) {
1135 ptd_offset
= ATL_PTD_OFFSET
;
1136 ptd_read(hcd
->regs
, ATL_PTD_OFFSET
, slot
, &ptd
);
1137 state
= check_atl_transfer(hcd
, &ptd
,
1138 slots
[slot
].qtd
->urb
);
1141 qtd
= slots
[slot
].qtd
;
1142 slots
[slot
].qtd
= NULL
;
1143 qh
= slots
[slot
].qh
;
1144 slots
[slot
].qh
= NULL
;
1147 WARN_ON(qtd
->status
!= QTD_XFER_STARTED
);
1150 case PTD_STATE_QTD_DONE
:
1151 if ((usb_pipeint(qtd
->urb
->pipe
)) &&
1152 (qtd
->urb
->dev
->speed
!= USB_SPEED_HIGH
))
1153 qtd
->actual_length
=
1154 FROM_DW3_SCS_NRBYTESTRANSFERRED(ptd
.dw3
);
1156 qtd
->actual_length
=
1157 FROM_DW3_NRBYTESTRANSFERRED(ptd
.dw3
);
1159 qtd
->status
= QTD_XFER_COMPLETE
;
1160 if (list_is_last(&qtd
->qtd_list
, &qh
->qtd_list
) ||
1164 qtd
= list_entry(qtd
->qtd_list
.next
,
1165 typeof(*qtd
), qtd_list
);
1167 qh
->toggle
= FROM_DW3_DATA_TOGGLE(ptd
.dw3
);
1168 qh
->ping
= FROM_DW3_PING(ptd
.dw3
);
1171 case PTD_STATE_QTD_RELOAD
: /* QTD_RETRY, for atls only */
1172 qtd
->status
= QTD_PAYLOAD_ALLOC
;
1173 ptd
.dw0
|= DW0_VALID_BIT
;
1174 /* RL counter = ERR counter */
1175 ptd
.dw3
&= ~TO_DW3_NAKCOUNT(0xf);
1176 ptd
.dw3
|= TO_DW3_NAKCOUNT(FROM_DW2_RL(ptd
.dw2
));
1177 ptd
.dw3
&= ~TO_DW3_CERR(3);
1178 ptd
.dw3
|= TO_DW3_CERR(ERR_COUNTER
);
1179 qh
->toggle
= FROM_DW3_DATA_TOGGLE(ptd
.dw3
);
1180 qh
->ping
= FROM_DW3_PING(ptd
.dw3
);
1183 case PTD_STATE_URB_RETIRE
:
1184 qtd
->status
= QTD_RETIRE
;
1185 if ((qtd
->urb
->dev
->speed
!= USB_SPEED_HIGH
) &&
1186 (qtd
->urb
->status
!= -EPIPE
) &&
1187 (qtd
->urb
->status
!= -EREMOTEIO
)) {
1188 qh
->tt_buffer_dirty
= 1;
1189 if (usb_hub_clear_tt_buffer(qtd
->urb
))
1190 /* Clear failed; let's hope things work
1192 qh
->tt_buffer_dirty
= 0;
1204 if (qtd
&& (qtd
->status
== QTD_PAYLOAD_ALLOC
)) {
1205 if (slots
== priv
->int_slots
) {
1206 if (state
== PTD_STATE_QTD_RELOAD
)
1207 dev_err(hcd
->self
.controller
,
1208 "%s: PTD_STATE_QTD_RELOAD on "
1209 "interrupt packet\n", __func__
);
1210 if (state
!= PTD_STATE_QTD_RELOAD
)
1211 create_ptd_int(qh
, qtd
, &ptd
);
1213 if (state
!= PTD_STATE_QTD_RELOAD
)
1214 create_ptd_atl(qh
, qtd
, &ptd
);
1217 start_bus_transfer(hcd
, ptd_offset
, slot
, slots
, qtd
,
1226 static irqreturn_t
isp1760_irq(struct usb_hcd
*hcd
)
1228 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
1230 irqreturn_t irqret
= IRQ_NONE
;
1232 spin_lock(&priv
->lock
);
1234 if (!(hcd
->state
& HC_STATE_RUNNING
))
1237 imask
= reg_read32(hcd
->regs
, HC_INTERRUPT_REG
);
1238 if (unlikely(!imask
))
1240 reg_write32(hcd
->regs
, HC_INTERRUPT_REG
, imask
); /* Clear */
1242 priv
->int_done_map
|= reg_read32(hcd
->regs
, HC_INT_PTD_DONEMAP_REG
);
1243 priv
->atl_done_map
|= reg_read32(hcd
->regs
, HC_ATL_PTD_DONEMAP_REG
);
1245 handle_done_ptds(hcd
);
1247 irqret
= IRQ_HANDLED
;
1249 spin_unlock(&priv
->lock
);
1255 * Workaround for problem described in chip errata 2:
1257 * Sometimes interrupts are not generated when ATL (not INT?) completion occurs.
1258 * One solution suggested in the errata is to use SOF interrupts _instead_of_
1259 * ATL done interrupts (the "instead of" might be important since it seems
1260 * enabling ATL interrupts also causes the chip to sometimes - rarely - "forget"
1261 * to set the PTD's done bit in addition to not generating an interrupt!).
1263 * So if we use SOF + ATL interrupts, we sometimes get stale PTDs since their
1264 * done bit is not being set. This is bad - it blocks the endpoint until reboot.
1266 * If we use SOF interrupts only, we get latency between ptd completion and the
1267 * actual handling. This is very noticeable in testusb runs which takes several
1268 * minutes longer without ATL interrupts.
1270 * A better solution is to run the code below every SLOT_CHECK_PERIOD ms. If it
1271 * finds active ATL slots which are older than SLOT_TIMEOUT ms, it checks the
1272 * slot's ACTIVE and VALID bits. If these are not set, the ptd is considered
1273 * completed and its done map bit is set.
1275 * The values of SLOT_TIMEOUT and SLOT_CHECK_PERIOD have been arbitrarily chosen
1276 * not to cause too much lag when this HW bug occurs, while still hopefully
1277 * ensuring that the check does not falsely trigger.
1279 #define SLOT_TIMEOUT 300
1280 #define SLOT_CHECK_PERIOD 200
1281 static struct timer_list errata2_timer
;
1283 static void errata2_function(unsigned long data
)
1285 struct usb_hcd
*hcd
= (struct usb_hcd
*) data
;
1286 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
1289 unsigned long spinflags
;
1291 spin_lock_irqsave(&priv
->lock
, spinflags
);
1293 for (slot
= 0; slot
< 32; slot
++)
1294 if (priv
->atl_slots
[slot
].qh
&& time_after(jiffies
,
1295 priv
->atl_slots
[slot
].timestamp
+
1296 SLOT_TIMEOUT
* HZ
/ 1000)) {
1297 ptd_read(hcd
->regs
, ATL_PTD_OFFSET
, slot
, &ptd
);
1298 if (!FROM_DW0_VALID(ptd
.dw0
) &&
1299 !FROM_DW3_ACTIVE(ptd
.dw3
))
1300 priv
->atl_done_map
|= 1 << slot
;
1303 if (priv
->atl_done_map
)
1304 handle_done_ptds(hcd
);
1306 spin_unlock_irqrestore(&priv
->lock
, spinflags
);
1308 errata2_timer
.expires
= jiffies
+ SLOT_CHECK_PERIOD
* HZ
/ 1000;
1309 add_timer(&errata2_timer
);
1312 static int isp1760_run(struct usb_hcd
*hcd
)
1319 hcd
->uses_new_polling
= 1;
1321 hcd
->state
= HC_STATE_RUNNING
;
1323 /* Set PTD interrupt AND & OR maps */
1324 reg_write32(hcd
->regs
, HC_ATL_IRQ_MASK_AND_REG
, 0);
1325 reg_write32(hcd
->regs
, HC_ATL_IRQ_MASK_OR_REG
, 0xffffffff);
1326 reg_write32(hcd
->regs
, HC_INT_IRQ_MASK_AND_REG
, 0);
1327 reg_write32(hcd
->regs
, HC_INT_IRQ_MASK_OR_REG
, 0xffffffff);
1328 reg_write32(hcd
->regs
, HC_ISO_IRQ_MASK_AND_REG
, 0);
1329 reg_write32(hcd
->regs
, HC_ISO_IRQ_MASK_OR_REG
, 0xffffffff);
1330 /* step 23 passed */
1332 temp
= reg_read32(hcd
->regs
, HC_HW_MODE_CTRL
);
1333 reg_write32(hcd
->regs
, HC_HW_MODE_CTRL
, temp
| HW_GLOBAL_INTR_EN
);
1335 command
= reg_read32(hcd
->regs
, HC_USBCMD
);
1336 command
&= ~(CMD_LRESET
|CMD_RESET
);
1338 reg_write32(hcd
->regs
, HC_USBCMD
, command
);
1340 retval
= handshake(hcd
, HC_USBCMD
, CMD_RUN
, CMD_RUN
, 250 * 1000);
1346 * Spec says to write FLAG_CF as last config action, priv code grabs
1347 * the semaphore while doing so.
1349 down_write(&ehci_cf_port_reset_rwsem
);
1350 reg_write32(hcd
->regs
, HC_CONFIGFLAG
, FLAG_CF
);
1352 retval
= handshake(hcd
, HC_CONFIGFLAG
, FLAG_CF
, FLAG_CF
, 250 * 1000);
1353 up_write(&ehci_cf_port_reset_rwsem
);
1357 init_timer(&errata2_timer
);
1358 errata2_timer
.function
= errata2_function
;
1359 errata2_timer
.data
= (unsigned long) hcd
;
1360 errata2_timer
.expires
= jiffies
+ SLOT_CHECK_PERIOD
* HZ
/ 1000;
1361 add_timer(&errata2_timer
);
1363 chipid
= reg_read32(hcd
->regs
, HC_CHIP_ID_REG
);
1364 dev_info(hcd
->self
.controller
, "USB ISP %04x HW rev. %d started\n",
1365 chipid
& 0xffff, chipid
>> 16);
1367 /* PTD Register Init Part 2, Step 28 */
1369 /* Setup registers controlling PTD checking */
1370 reg_write32(hcd
->regs
, HC_ATL_PTD_LASTPTD_REG
, 0x80000000);
1371 reg_write32(hcd
->regs
, HC_INT_PTD_LASTPTD_REG
, 0x80000000);
1372 reg_write32(hcd
->regs
, HC_ISO_PTD_LASTPTD_REG
, 0x00000001);
1373 reg_write32(hcd
->regs
, HC_ATL_PTD_SKIPMAP_REG
, 0xffffffff);
1374 reg_write32(hcd
->regs
, HC_INT_PTD_SKIPMAP_REG
, 0xffffffff);
1375 reg_write32(hcd
->regs
, HC_ISO_PTD_SKIPMAP_REG
, 0xffffffff);
1376 reg_write32(hcd
->regs
, HC_BUFFER_STATUS_REG
,
1377 ATL_BUF_FILL
| INT_BUF_FILL
);
1379 /* GRR this is run-once init(), being done every time the HC starts.
1380 * So long as they're part of class devices, we can't do it init()
1381 * since the class device isn't created that early.
1386 static int qtd_fill(struct isp1760_qtd
*qtd
, void *databuffer
, size_t len
)
1388 qtd
->data_buffer
= databuffer
;
1390 if (len
> MAX_PAYLOAD_SIZE
)
1391 len
= MAX_PAYLOAD_SIZE
;
1397 static void qtd_list_free(struct list_head
*qtd_list
)
1399 struct isp1760_qtd
*qtd
, *qtd_next
;
1401 list_for_each_entry_safe(qtd
, qtd_next
, qtd_list
, qtd_list
) {
1402 list_del(&qtd
->qtd_list
);
1408 * Packetize urb->transfer_buffer into list of packets of size wMaxPacketSize.
1409 * Also calculate the PID type (SETUP/IN/OUT) for each packet.
1411 #define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
1412 static void packetize_urb(struct usb_hcd
*hcd
,
1413 struct urb
*urb
, struct list_head
*head
, gfp_t flags
)
1415 struct isp1760_qtd
*qtd
;
1417 int len
, maxpacketsize
;
1421 * URBs map to sequences of QTDs: one logical transaction
1424 if (!urb
->transfer_buffer
&& urb
->transfer_buffer_length
) {
1425 /* XXX This looks like usb storage / SCSI bug */
1426 dev_err(hcd
->self
.controller
,
1427 "buf is null, dma is %08lx len is %d\n",
1428 (long unsigned)urb
->transfer_dma
,
1429 urb
->transfer_buffer_length
);
1433 if (usb_pipein(urb
->pipe
))
1434 packet_type
= IN_PID
;
1436 packet_type
= OUT_PID
;
1438 if (usb_pipecontrol(urb
->pipe
)) {
1439 qtd
= qtd_alloc(flags
, urb
, SETUP_PID
);
1442 qtd_fill(qtd
, urb
->setup_packet
, sizeof(struct usb_ctrlrequest
));
1443 list_add_tail(&qtd
->qtd_list
, head
);
1445 /* for zero length DATA stages, STATUS is always IN */
1446 if (urb
->transfer_buffer_length
== 0)
1447 packet_type
= IN_PID
;
1450 maxpacketsize
= max_packet(usb_maxpacket(urb
->dev
, urb
->pipe
,
1451 usb_pipeout(urb
->pipe
)));
1454 * buffer gets wrapped in one or more qtds;
1455 * last one may be "short" (including zero len)
1456 * and may serve as a control status ack
1458 buf
= urb
->transfer_buffer
;
1459 len
= urb
->transfer_buffer_length
;
1464 qtd
= qtd_alloc(flags
, urb
, packet_type
);
1467 this_qtd_len
= qtd_fill(qtd
, buf
, len
);
1468 list_add_tail(&qtd
->qtd_list
, head
);
1470 len
-= this_qtd_len
;
1471 buf
+= this_qtd_len
;
1478 * control requests may need a terminating data "status" ack;
1479 * bulk ones may need a terminating short packet (zero length).
1481 if (urb
->transfer_buffer_length
!= 0) {
1484 if (usb_pipecontrol(urb
->pipe
)) {
1486 if (packet_type
== IN_PID
)
1487 packet_type
= OUT_PID
;
1489 packet_type
= IN_PID
;
1490 } else if (usb_pipebulk(urb
->pipe
)
1491 && (urb
->transfer_flags
& URB_ZERO_PACKET
)
1492 && !(urb
->transfer_buffer_length
%
1497 qtd
= qtd_alloc(flags
, urb
, packet_type
);
1501 /* never any data in such packets */
1502 qtd_fill(qtd
, NULL
, 0);
1503 list_add_tail(&qtd
->qtd_list
, head
);
1510 qtd_list_free(head
);
1513 static int isp1760_urb_enqueue(struct usb_hcd
*hcd
, struct urb
*urb
,
1516 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
1517 struct list_head
*ep_queue
;
1518 struct isp1760_qh
*qh
, *qhit
;
1519 unsigned long spinflags
;
1520 LIST_HEAD(new_qtds
);
1524 switch (usb_pipetype(urb
->pipe
)) {
1526 ep_queue
= &priv
->qh_list
[QH_CONTROL
];
1529 ep_queue
= &priv
->qh_list
[QH_BULK
];
1531 case PIPE_INTERRUPT
:
1532 if (urb
->interval
< 0)
1534 /* FIXME: Check bandwidth */
1535 ep_queue
= &priv
->qh_list
[QH_INTERRUPT
];
1537 case PIPE_ISOCHRONOUS
:
1538 dev_err(hcd
->self
.controller
, "%s: isochronous USB packets "
1539 "not yet supported\n",
1543 dev_err(hcd
->self
.controller
, "%s: unknown pipe type\n",
1548 if (usb_pipein(urb
->pipe
))
1549 urb
->actual_length
= 0;
1551 packetize_urb(hcd
, urb
, &new_qtds
, mem_flags
);
1552 if (list_empty(&new_qtds
))
1556 spin_lock_irqsave(&priv
->lock
, spinflags
);
1558 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
)) {
1559 retval
= -ESHUTDOWN
;
1560 qtd_list_free(&new_qtds
);
1563 retval
= usb_hcd_link_urb_to_ep(hcd
, urb
);
1565 qtd_list_free(&new_qtds
);
1569 qh
= urb
->ep
->hcpriv
;
1572 list_for_each_entry(qhit
, ep_queue
, qh_list
) {
1579 list_add_tail(&qh
->qh_list
, ep_queue
);
1581 qh
= qh_alloc(GFP_ATOMIC
);
1584 usb_hcd_unlink_urb_from_ep(hcd
, urb
);
1585 qtd_list_free(&new_qtds
);
1588 list_add_tail(&qh
->qh_list
, ep_queue
);
1589 urb
->ep
->hcpriv
= qh
;
1592 list_splice_tail(&new_qtds
, &qh
->qtd_list
);
1596 spin_unlock_irqrestore(&priv
->lock
, spinflags
);
1600 static void kill_transfer(struct usb_hcd
*hcd
, struct urb
*urb
,
1601 struct isp1760_qh
*qh
)
1603 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
1606 WARN_ON(qh
->slot
== -1);
1608 /* We need to forcefully reclaim the slot since some transfers never
1609 return, e.g. interrupt transfers and NAKed bulk transfers. */
1610 if (usb_pipecontrol(urb
->pipe
) || usb_pipebulk(urb
->pipe
)) {
1611 skip_map
= reg_read32(hcd
->regs
, HC_ATL_PTD_SKIPMAP_REG
);
1612 skip_map
|= (1 << qh
->slot
);
1613 reg_write32(hcd
->regs
, HC_ATL_PTD_SKIPMAP_REG
, skip_map
);
1614 priv
->atl_slots
[qh
->slot
].qh
= NULL
;
1615 priv
->atl_slots
[qh
->slot
].qtd
= NULL
;
1617 skip_map
= reg_read32(hcd
->regs
, HC_INT_PTD_SKIPMAP_REG
);
1618 skip_map
|= (1 << qh
->slot
);
1619 reg_write32(hcd
->regs
, HC_INT_PTD_SKIPMAP_REG
, skip_map
);
1620 priv
->int_slots
[qh
->slot
].qh
= NULL
;
1621 priv
->int_slots
[qh
->slot
].qtd
= NULL
;
1628 * Retire the qtds beginning at 'qtd' and belonging all to the same urb, killing
1629 * any active transfer belonging to the urb in the process.
1631 static void dequeue_urb_from_qtd(struct usb_hcd
*hcd
, struct isp1760_qh
*qh
,
1632 struct isp1760_qtd
*qtd
)
1635 int urb_was_running
;
1638 urb_was_running
= 0;
1639 list_for_each_entry_from(qtd
, &qh
->qtd_list
, qtd_list
) {
1640 if (qtd
->urb
!= urb
)
1643 if (qtd
->status
>= QTD_XFER_STARTED
)
1644 urb_was_running
= 1;
1645 if (last_qtd_of_urb(qtd
, qh
) &&
1646 (qtd
->status
>= QTD_XFER_COMPLETE
))
1647 urb_was_running
= 0;
1649 if (qtd
->status
== QTD_XFER_STARTED
)
1650 kill_transfer(hcd
, urb
, qh
);
1651 qtd
->status
= QTD_RETIRE
;
1654 if ((urb
->dev
->speed
!= USB_SPEED_HIGH
) && urb_was_running
) {
1655 qh
->tt_buffer_dirty
= 1;
1656 if (usb_hub_clear_tt_buffer(urb
))
1657 /* Clear failed; let's hope things work anyway */
1658 qh
->tt_buffer_dirty
= 0;
1662 static int isp1760_urb_dequeue(struct usb_hcd
*hcd
, struct urb
*urb
,
1665 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
1666 unsigned long spinflags
;
1667 struct isp1760_qh
*qh
;
1668 struct isp1760_qtd
*qtd
;
1671 spin_lock_irqsave(&priv
->lock
, spinflags
);
1672 retval
= usb_hcd_check_unlink_urb(hcd
, urb
, status
);
1676 qh
= urb
->ep
->hcpriv
;
1682 list_for_each_entry(qtd
, &qh
->qtd_list
, qtd_list
)
1683 if (qtd
->urb
== urb
) {
1684 dequeue_urb_from_qtd(hcd
, qh
, qtd
);
1685 list_move(&qtd
->qtd_list
, &qh
->qtd_list
);
1689 urb
->status
= status
;
1693 spin_unlock_irqrestore(&priv
->lock
, spinflags
);
1697 static void isp1760_endpoint_disable(struct usb_hcd
*hcd
,
1698 struct usb_host_endpoint
*ep
)
1700 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
1701 unsigned long spinflags
;
1702 struct isp1760_qh
*qh
, *qh_iter
;
1705 spin_lock_irqsave(&priv
->lock
, spinflags
);
1711 WARN_ON(!list_empty(&qh
->qtd_list
));
1713 for (i
= 0; i
< QH_END
; i
++)
1714 list_for_each_entry(qh_iter
, &priv
->qh_list
[i
], qh_list
)
1715 if (qh_iter
== qh
) {
1716 list_del(&qh_iter
->qh_list
);
1726 spin_unlock_irqrestore(&priv
->lock
, spinflags
);
1729 static int isp1760_hub_status_data(struct usb_hcd
*hcd
, char *buf
)
1731 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
1732 u32 temp
, status
= 0;
1735 unsigned long flags
;
1737 /* if !PM, root hub timers won't get shut down ... */
1738 if (!HC_IS_RUNNING(hcd
->state
))
1741 /* init status to no-changes */
1745 spin_lock_irqsave(&priv
->lock
, flags
);
1746 temp
= reg_read32(hcd
->regs
, HC_PORTSC1
);
1748 if (temp
& PORT_OWNER
) {
1749 if (temp
& PORT_CSC
) {
1751 reg_write32(hcd
->regs
, HC_PORTSC1
, temp
);
1757 * Return status information even for ports with OWNER set.
1758 * Otherwise hub_wq wouldn't see the disconnect event when a
1759 * high-speed device is switched over to the companion
1760 * controller by the user.
1763 if ((temp
& mask
) != 0
1764 || ((temp
& PORT_RESUME
) != 0
1765 && time_after_eq(jiffies
,
1766 priv
->reset_done
))) {
1767 buf
[0] |= 1 << (0 + 1);
1770 /* FIXME autosuspend idle root hubs */
1772 spin_unlock_irqrestore(&priv
->lock
, flags
);
1773 return status
? retval
: 0;
1776 static void isp1760_hub_descriptor(struct isp1760_hcd
*priv
,
1777 struct usb_hub_descriptor
*desc
)
1779 int ports
= HCS_N_PORTS(priv
->hcs_params
);
1782 desc
->bDescriptorType
= 0x29;
1783 /* priv 1.0, 2.3.9 says 20ms max */
1784 desc
->bPwrOn2PwrGood
= 10;
1785 desc
->bHubContrCurrent
= 0;
1787 desc
->bNbrPorts
= ports
;
1788 temp
= 1 + (ports
/ 8);
1789 desc
->bDescLength
= 7 + 2 * temp
;
1791 /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */
1792 memset(&desc
->u
.hs
.DeviceRemovable
[0], 0, temp
);
1793 memset(&desc
->u
.hs
.DeviceRemovable
[temp
], 0xff, temp
);
1795 /* per-port overcurrent reporting */
1797 if (HCS_PPC(priv
->hcs_params
))
1798 /* per-port power control */
1801 /* no power switching */
1803 desc
->wHubCharacteristics
= cpu_to_le16(temp
);
1806 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
1808 static int check_reset_complete(struct usb_hcd
*hcd
, int index
,
1811 if (!(port_status
& PORT_CONNECT
))
1814 /* if reset finished and it's still not enabled -- handoff */
1815 if (!(port_status
& PORT_PE
)) {
1817 dev_info(hcd
->self
.controller
,
1818 "port %d full speed --> companion\n",
1821 port_status
|= PORT_OWNER
;
1822 port_status
&= ~PORT_RWC_BITS
;
1823 reg_write32(hcd
->regs
, HC_PORTSC1
, port_status
);
1826 dev_info(hcd
->self
.controller
, "port %d high speed\n",
1832 static int isp1760_hub_control(struct usb_hcd
*hcd
, u16 typeReq
,
1833 u16 wValue
, u16 wIndex
, char *buf
, u16 wLength
)
1835 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
1836 int ports
= HCS_N_PORTS(priv
->hcs_params
);
1838 unsigned long flags
;
1843 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
1844 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
1845 * (track current state ourselves) ... blink for diagnostics,
1846 * power, "this is the one", etc. EHCI spec supports this.
1849 spin_lock_irqsave(&priv
->lock
, flags
);
1851 case ClearHubFeature
:
1853 case C_HUB_LOCAL_POWER
:
1854 case C_HUB_OVER_CURRENT
:
1855 /* no hub-wide feature/status flags */
1861 case ClearPortFeature
:
1862 if (!wIndex
|| wIndex
> ports
)
1865 temp
= reg_read32(hcd
->regs
, HC_PORTSC1
);
1868 * Even if OWNER is set, so the port is owned by the
1869 * companion controller, hub_wq needs to be able to clear
1870 * the port-change status bits (especially
1871 * USB_PORT_STAT_C_CONNECTION).
1875 case USB_PORT_FEAT_ENABLE
:
1876 reg_write32(hcd
->regs
, HC_PORTSC1
, temp
& ~PORT_PE
);
1878 case USB_PORT_FEAT_C_ENABLE
:
1881 case USB_PORT_FEAT_SUSPEND
:
1882 if (temp
& PORT_RESET
)
1885 if (temp
& PORT_SUSPEND
) {
1886 if ((temp
& PORT_PE
) == 0)
1888 /* resume signaling for 20 msec */
1889 temp
&= ~(PORT_RWC_BITS
);
1890 reg_write32(hcd
->regs
, HC_PORTSC1
,
1891 temp
| PORT_RESUME
);
1892 priv
->reset_done
= jiffies
+
1893 msecs_to_jiffies(20);
1896 case USB_PORT_FEAT_C_SUSPEND
:
1897 /* we auto-clear this feature */
1899 case USB_PORT_FEAT_POWER
:
1900 if (HCS_PPC(priv
->hcs_params
))
1901 reg_write32(hcd
->regs
, HC_PORTSC1
,
1902 temp
& ~PORT_POWER
);
1904 case USB_PORT_FEAT_C_CONNECTION
:
1905 reg_write32(hcd
->regs
, HC_PORTSC1
, temp
| PORT_CSC
);
1907 case USB_PORT_FEAT_C_OVER_CURRENT
:
1910 case USB_PORT_FEAT_C_RESET
:
1911 /* GetPortStatus clears reset */
1916 reg_read32(hcd
->regs
, HC_USBCMD
);
1918 case GetHubDescriptor
:
1919 isp1760_hub_descriptor(priv
, (struct usb_hub_descriptor
*)
1923 /* no hub-wide feature/status flags */
1927 if (!wIndex
|| wIndex
> ports
)
1931 temp
= reg_read32(hcd
->regs
, HC_PORTSC1
);
1933 /* wPortChange bits */
1934 if (temp
& PORT_CSC
)
1935 status
|= USB_PORT_STAT_C_CONNECTION
<< 16;
1938 /* whoever resumes must GetPortStatus to complete it!! */
1939 if (temp
& PORT_RESUME
) {
1940 dev_err(hcd
->self
.controller
, "Port resume should be skipped.\n");
1942 /* Remote Wakeup received? */
1943 if (!priv
->reset_done
) {
1944 /* resume signaling for 20 msec */
1945 priv
->reset_done
= jiffies
1946 + msecs_to_jiffies(20);
1947 /* check the port again */
1948 mod_timer(&hcd
->rh_timer
, priv
->reset_done
);
1951 /* resume completed? */
1952 else if (time_after_eq(jiffies
,
1953 priv
->reset_done
)) {
1954 status
|= USB_PORT_STAT_C_SUSPEND
<< 16;
1955 priv
->reset_done
= 0;
1957 /* stop resume signaling */
1958 temp
= reg_read32(hcd
->regs
, HC_PORTSC1
);
1959 reg_write32(hcd
->regs
, HC_PORTSC1
,
1960 temp
& ~(PORT_RWC_BITS
| PORT_RESUME
));
1961 retval
= handshake(hcd
, HC_PORTSC1
,
1962 PORT_RESUME
, 0, 2000 /* 2msec */);
1964 dev_err(hcd
->self
.controller
,
1965 "port %d resume error %d\n",
1966 wIndex
+ 1, retval
);
1969 temp
&= ~(PORT_SUSPEND
|PORT_RESUME
|(3<<10));
1973 /* whoever resets must GetPortStatus to complete it!! */
1974 if ((temp
& PORT_RESET
)
1975 && time_after_eq(jiffies
,
1976 priv
->reset_done
)) {
1977 status
|= USB_PORT_STAT_C_RESET
<< 16;
1978 priv
->reset_done
= 0;
1980 /* force reset to complete */
1981 reg_write32(hcd
->regs
, HC_PORTSC1
, temp
& ~PORT_RESET
);
1982 /* REVISIT: some hardware needs 550+ usec to clear
1983 * this bit; seems too long to spin routinely...
1985 retval
= handshake(hcd
, HC_PORTSC1
,
1986 PORT_RESET
, 0, 750);
1988 dev_err(hcd
->self
.controller
, "port %d reset error %d\n",
1989 wIndex
+ 1, retval
);
1993 /* see what we found out */
1994 temp
= check_reset_complete(hcd
, wIndex
,
1995 reg_read32(hcd
->regs
, HC_PORTSC1
));
1998 * Even if OWNER is set, there's no harm letting hub_wq
1999 * see the wPortStatus values (they should all be 0 except
2000 * for PORT_POWER anyway).
2003 if (temp
& PORT_OWNER
)
2004 dev_err(hcd
->self
.controller
, "PORT_OWNER is set\n");
2006 if (temp
& PORT_CONNECT
) {
2007 status
|= USB_PORT_STAT_CONNECTION
;
2008 /* status may be from integrated TT */
2009 status
|= USB_PORT_STAT_HIGH_SPEED
;
2012 status
|= USB_PORT_STAT_ENABLE
;
2013 if (temp
& (PORT_SUSPEND
|PORT_RESUME
))
2014 status
|= USB_PORT_STAT_SUSPEND
;
2015 if (temp
& PORT_RESET
)
2016 status
|= USB_PORT_STAT_RESET
;
2017 if (temp
& PORT_POWER
)
2018 status
|= USB_PORT_STAT_POWER
;
2020 put_unaligned(cpu_to_le32(status
), (__le32
*) buf
);
2024 case C_HUB_LOCAL_POWER
:
2025 case C_HUB_OVER_CURRENT
:
2026 /* no hub-wide feature/status flags */
2032 case SetPortFeature
:
2033 selector
= wIndex
>> 8;
2035 if (!wIndex
|| wIndex
> ports
)
2038 temp
= reg_read32(hcd
->regs
, HC_PORTSC1
);
2039 if (temp
& PORT_OWNER
)
2042 /* temp &= ~PORT_RWC_BITS; */
2044 case USB_PORT_FEAT_ENABLE
:
2045 reg_write32(hcd
->regs
, HC_PORTSC1
, temp
| PORT_PE
);
2048 case USB_PORT_FEAT_SUSPEND
:
2049 if ((temp
& PORT_PE
) == 0
2050 || (temp
& PORT_RESET
) != 0)
2053 reg_write32(hcd
->regs
, HC_PORTSC1
, temp
| PORT_SUSPEND
);
2055 case USB_PORT_FEAT_POWER
:
2056 if (HCS_PPC(priv
->hcs_params
))
2057 reg_write32(hcd
->regs
, HC_PORTSC1
,
2060 case USB_PORT_FEAT_RESET
:
2061 if (temp
& PORT_RESUME
)
2063 /* line status bits may report this as low speed,
2064 * which can be fine if this root hub has a
2065 * transaction translator built in.
2067 if ((temp
& (PORT_PE
|PORT_CONNECT
)) == PORT_CONNECT
2068 && PORT_USB11(temp
)) {
2075 * caller must wait, then call GetPortStatus
2076 * usb 2.0 spec says 50 ms resets on root
2078 priv
->reset_done
= jiffies
+
2079 msecs_to_jiffies(50);
2081 reg_write32(hcd
->regs
, HC_PORTSC1
, temp
);
2086 reg_read32(hcd
->regs
, HC_USBCMD
);
2091 /* "stall" on error */
2094 spin_unlock_irqrestore(&priv
->lock
, flags
);
2098 static int isp1760_get_frame(struct usb_hcd
*hcd
)
2100 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
2103 fr
= reg_read32(hcd
->regs
, HC_FRINDEX
);
2104 return (fr
>> 3) % priv
->periodic_size
;
2107 static void isp1760_stop(struct usb_hcd
*hcd
)
2109 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
2112 del_timer(&errata2_timer
);
2114 isp1760_hub_control(hcd
, ClearPortFeature
, USB_PORT_FEAT_POWER
, 1,
2118 spin_lock_irq(&priv
->lock
);
2121 temp
= reg_read32(hcd
->regs
, HC_HW_MODE_CTRL
);
2122 reg_write32(hcd
->regs
, HC_HW_MODE_CTRL
, temp
&= ~HW_GLOBAL_INTR_EN
);
2123 spin_unlock_irq(&priv
->lock
);
2125 reg_write32(hcd
->regs
, HC_CONFIGFLAG
, 0);
2128 static void isp1760_shutdown(struct usb_hcd
*hcd
)
2133 temp
= reg_read32(hcd
->regs
, HC_HW_MODE_CTRL
);
2134 reg_write32(hcd
->regs
, HC_HW_MODE_CTRL
, temp
&= ~HW_GLOBAL_INTR_EN
);
2136 command
= reg_read32(hcd
->regs
, HC_USBCMD
);
2137 command
&= ~CMD_RUN
;
2138 reg_write32(hcd
->regs
, HC_USBCMD
, command
);
2141 static void isp1760_clear_tt_buffer_complete(struct usb_hcd
*hcd
,
2142 struct usb_host_endpoint
*ep
)
2144 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
2145 struct isp1760_qh
*qh
= ep
->hcpriv
;
2146 unsigned long spinflags
;
2151 spin_lock_irqsave(&priv
->lock
, spinflags
);
2152 qh
->tt_buffer_dirty
= 0;
2154 spin_unlock_irqrestore(&priv
->lock
, spinflags
);
2158 static const struct hc_driver isp1760_hc_driver
= {
2159 .description
= "isp1760-hcd",
2160 .product_desc
= "NXP ISP1760 USB Host Controller",
2161 .hcd_priv_size
= sizeof(struct isp1760_hcd
),
2163 .flags
= HCD_MEMORY
| HCD_USB2
,
2164 .reset
= isp1760_hc_setup
,
2165 .start
= isp1760_run
,
2166 .stop
= isp1760_stop
,
2167 .shutdown
= isp1760_shutdown
,
2168 .urb_enqueue
= isp1760_urb_enqueue
,
2169 .urb_dequeue
= isp1760_urb_dequeue
,
2170 .endpoint_disable
= isp1760_endpoint_disable
,
2171 .get_frame_number
= isp1760_get_frame
,
2172 .hub_status_data
= isp1760_hub_status_data
,
2173 .hub_control
= isp1760_hub_control
,
2174 .clear_tt_buffer_complete
= isp1760_clear_tt_buffer_complete
,
2177 int __init
init_kmem_once(void)
2179 urb_listitem_cachep
= kmem_cache_create("isp1760_urb_listitem",
2180 sizeof(struct urb_listitem
), 0, SLAB_TEMPORARY
|
2181 SLAB_MEM_SPREAD
, NULL
);
2183 if (!urb_listitem_cachep
)
2186 qtd_cachep
= kmem_cache_create("isp1760_qtd",
2187 sizeof(struct isp1760_qtd
), 0, SLAB_TEMPORARY
|
2188 SLAB_MEM_SPREAD
, NULL
);
2193 qh_cachep
= kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh
),
2194 0, SLAB_TEMPORARY
| SLAB_MEM_SPREAD
, NULL
);
2197 kmem_cache_destroy(qtd_cachep
);
2204 void deinit_kmem_cache(void)
2206 kmem_cache_destroy(qtd_cachep
);
2207 kmem_cache_destroy(qh_cachep
);
2208 kmem_cache_destroy(urb_listitem_cachep
);
2211 struct usb_hcd
*isp1760_register(phys_addr_t res_start
, resource_size_t res_len
,
2212 int irq
, unsigned long irqflags
,
2213 struct device
*dev
, const char *busname
,
2214 unsigned int devflags
)
2216 struct usb_hcd
*hcd
;
2217 struct isp1760_hcd
*priv
;
2221 return ERR_PTR(-ENODEV
);
2223 /* prevent usb-core allocating DMA pages */
2224 dev
->dma_mask
= NULL
;
2226 hcd
= usb_create_hcd(&isp1760_hc_driver
, dev
, dev_name(dev
));
2228 return ERR_PTR(-ENOMEM
);
2230 priv
= hcd_to_priv(hcd
);
2231 priv
->devflags
= devflags
;
2233 priv
->rst_gpio
= devm_gpiod_get_optional(dev
, NULL
, GPIOD_OUT_HIGH
);
2234 if (IS_ERR(priv
->rst_gpio
)) {
2235 ret
= PTR_ERR(priv
->rst_gpio
);
2240 hcd
->regs
= ioremap(res_start
, res_len
);
2247 hcd
->rsrc_start
= res_start
;
2248 hcd
->rsrc_len
= res_len
;
2250 ret
= usb_add_hcd(hcd
, irq
, irqflags
);
2253 device_wakeup_enable(hcd
->self
.controller
);
2255 dev_set_drvdata(dev
, hcd
);
2265 return ERR_PTR(ret
);
2268 void isp1760_unregister(struct device
*dev
)
2270 struct usb_hcd
*hcd
= dev_get_drvdata(dev
);
2272 usb_remove_hcd(hcd
);
2274 release_mem_region(hcd
->rsrc_start
, hcd
->rsrc_len
);
2278 MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP");
2279 MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>");
2280 MODULE_LICENSE("GPL v2");