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>
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/list.h>
16 #include <linux/usb.h>
17 #include <linux/debugfs.h>
18 #include <linux/uaccess.h>
20 #include <asm/unaligned.h>
22 #include "../core/hcd.h"
23 #include "isp1760-hcd.h"
25 static struct kmem_cache
*qtd_cachep
;
26 static struct kmem_cache
*qh_cachep
;
31 struct inter_packet_info atl_ints
[32];
32 struct inter_packet_info int_ints
[32];
33 struct memory_chunk memory_pool
[BLOCKS
];
35 /* periodic schedule support */
36 #define DEFAULT_I_TDPS 1024
37 unsigned periodic_size
;
39 unsigned long reset_done
;
40 unsigned long next_statechange
;
41 unsigned int devflags
;
44 static inline struct isp1760_hcd
*hcd_to_priv(struct usb_hcd
*hcd
)
46 return (struct isp1760_hcd
*) (hcd
->hcd_priv
);
48 static inline struct usb_hcd
*priv_to_hcd(struct isp1760_hcd
*priv
)
50 return container_of((void *) priv
, struct usb_hcd
, hcd_priv
);
53 /* Section 2.2 Host Controller Capability Registers */
54 #define HC_LENGTH(p) (((p)>>00)&0x00ff) /* bits 7:0 */
55 #define HC_VERSION(p) (((p)>>16)&0xffff) /* bits 31:16 */
56 #define HCS_INDICATOR(p) ((p)&(1 << 16)) /* true: has port indicators */
57 #define HCS_PPC(p) ((p)&(1 << 4)) /* true: port power control */
58 #define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */
59 #define HCC_ISOC_CACHE(p) ((p)&(1 << 7)) /* true: can cache isoc frame */
60 #define HCC_ISOC_THRES(p) (((p)>>4)&0x7) /* bits 6:4, uframes cached */
62 /* Section 2.3 Host Controller Operational Registers */
63 #define CMD_LRESET (1<<7) /* partial reset (no ports, etc) */
64 #define CMD_RESET (1<<1) /* reset HC not bus */
65 #define CMD_RUN (1<<0) /* start/stop HC */
66 #define STS_PCD (1<<2) /* port change detect */
67 #define FLAG_CF (1<<0) /* true: we'll support "high speed" */
69 #define PORT_OWNER (1<<13) /* true: companion hc owns this port */
70 #define PORT_POWER (1<<12) /* true: has power (see PPC) */
71 #define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10)) /* USB 1.1 device */
72 #define PORT_RESET (1<<8) /* reset port */
73 #define PORT_SUSPEND (1<<7) /* suspend port */
74 #define PORT_RESUME (1<<6) /* resume it */
75 #define PORT_PE (1<<2) /* port enable */
76 #define PORT_CSC (1<<1) /* connect status change */
77 #define PORT_CONNECT (1<<0) /* device connected */
78 #define PORT_RWC_BITS (PORT_CSC)
81 struct isp1760_qtd
*hw_next
;
86 /* the rest is HCD-private */
87 struct list_head qtd_list
;
93 #define URB_COMPLETE_NOTIFY (1 << 0)
94 #define URB_ENQUEUED (1 << 1)
95 #define URB_TYPE_ATL (1 << 2)
96 #define URB_TYPE_INT (1 << 3)
100 /* first part defined by EHCI spec */
101 struct list_head qtd_list
;
102 struct isp1760_hcd
*priv
;
104 /* periodic schedule info */
105 unsigned short period
; /* polling interval */
106 struct usb_device
*dev
;
112 #define ehci_port_speed(priv, portsc) (1 << USB_PORT_FEAT_HIGHSPEED)
114 static unsigned int isp1760_readl(__u32 __iomem
*regs
)
119 static void isp1760_writel(const unsigned int val
, __u32 __iomem
*regs
)
125 * The next two copy via MMIO data to/from the device. memcpy_{to|from}io()
126 * doesn't quite work because some people have to enforce 32-bit access
128 static void priv_read_copy(struct isp1760_hcd
*priv
, u32
*src
,
129 __u32 __iomem
*dst
, u32 len
)
135 printk(KERN_ERR
"ERROR: buffer: %p len: %d\n", src
, len
);
140 *src
= __raw_readl(dst
);
149 /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
152 val
= isp1760_readl(dst
);
164 static void priv_write_copy(const struct isp1760_hcd
*priv
, const u32
*src
,
165 __u32 __iomem
*dst
, u32 len
)
168 __raw_writel(*src
, dst
);
176 /* in case we have 3, 2 or 1 by left. The buffer is allocated and the
177 * extra bytes should not be read by the HW
180 __raw_writel(*src
, dst
);
183 /* memory management of the 60kb on the chip from 0x1000 to 0xffff */
184 static void init_memory(struct isp1760_hcd
*priv
)
190 for (i
= 0; i
< BLOCK_1_NUM
; i
++) {
191 priv
->memory_pool
[i
].start
= payload
;
192 priv
->memory_pool
[i
].size
= BLOCK_1_SIZE
;
193 priv
->memory_pool
[i
].free
= 1;
194 payload
+= priv
->memory_pool
[i
].size
;
198 for (i
= BLOCK_1_NUM
; i
< BLOCK_1_NUM
+ BLOCK_2_NUM
; i
++) {
199 priv
->memory_pool
[i
].start
= payload
;
200 priv
->memory_pool
[i
].size
= BLOCK_2_SIZE
;
201 priv
->memory_pool
[i
].free
= 1;
202 payload
+= priv
->memory_pool
[i
].size
;
206 for (i
= BLOCK_1_NUM
+ BLOCK_2_NUM
; i
< BLOCKS
; i
++) {
207 priv
->memory_pool
[i
].start
= payload
;
208 priv
->memory_pool
[i
].size
= BLOCK_3_SIZE
;
209 priv
->memory_pool
[i
].free
= 1;
210 payload
+= priv
->memory_pool
[i
].size
;
213 BUG_ON(payload
- priv
->memory_pool
[i
- 1].size
> PAYLOAD_SIZE
);
216 static u32
alloc_mem(struct isp1760_hcd
*priv
, u32 size
)
221 return ISP1760_NULL_POINTER
;
223 for (i
= 0; i
< BLOCKS
; i
++) {
224 if (priv
->memory_pool
[i
].size
>= size
&&
225 priv
->memory_pool
[i
].free
) {
227 priv
->memory_pool
[i
].free
= 0;
228 return priv
->memory_pool
[i
].start
;
232 printk(KERN_ERR
"ISP1760 MEM: can not allocate %d bytes of memory\n",
234 printk(KERN_ERR
"Current memory map:\n");
235 for (i
= 0; i
< BLOCKS
; i
++) {
236 printk(KERN_ERR
"Pool %2d size %4d status: %d\n",
237 i
, priv
->memory_pool
[i
].size
,
238 priv
->memory_pool
[i
].free
);
240 /* XXX maybe -ENOMEM could be possible */
245 static void free_mem(struct isp1760_hcd
*priv
, u32 mem
)
249 if (mem
== ISP1760_NULL_POINTER
)
252 for (i
= 0; i
< BLOCKS
; i
++) {
253 if (priv
->memory_pool
[i
].start
== mem
) {
255 BUG_ON(priv
->memory_pool
[i
].free
);
257 priv
->memory_pool
[i
].free
= 1;
262 printk(KERN_ERR
"Trying to free not-here-allocated memory :%08x\n",
267 static void isp1760_init_regs(struct usb_hcd
*hcd
)
269 isp1760_writel(0, hcd
->regs
+ HC_BUFFER_STATUS_REG
);
270 isp1760_writel(NO_TRANSFER_ACTIVE
, hcd
->regs
+
271 HC_ATL_PTD_SKIPMAP_REG
);
272 isp1760_writel(NO_TRANSFER_ACTIVE
, hcd
->regs
+
273 HC_INT_PTD_SKIPMAP_REG
);
274 isp1760_writel(NO_TRANSFER_ACTIVE
, hcd
->regs
+
275 HC_ISO_PTD_SKIPMAP_REG
);
277 isp1760_writel(~NO_TRANSFER_ACTIVE
, hcd
->regs
+
278 HC_ATL_PTD_DONEMAP_REG
);
279 isp1760_writel(~NO_TRANSFER_ACTIVE
, hcd
->regs
+
280 HC_INT_PTD_DONEMAP_REG
);
281 isp1760_writel(~NO_TRANSFER_ACTIVE
, hcd
->regs
+
282 HC_ISO_PTD_DONEMAP_REG
);
285 static int handshake(struct isp1760_hcd
*priv
, void __iomem
*ptr
,
286 u32 mask
, u32 done
, int usec
)
291 result
= isp1760_readl(ptr
);
303 /* reset a non-running (STS_HALT == 1) controller */
304 static int ehci_reset(struct isp1760_hcd
*priv
)
307 struct usb_hcd
*hcd
= priv_to_hcd(priv
);
308 u32 command
= isp1760_readl(hcd
->regs
+ HC_USBCMD
);
310 command
|= CMD_RESET
;
311 isp1760_writel(command
, hcd
->regs
+ HC_USBCMD
);
312 hcd
->state
= HC_STATE_HALT
;
313 priv
->next_statechange
= jiffies
;
314 retval
= handshake(priv
, hcd
->regs
+ HC_USBCMD
,
315 CMD_RESET
, 0, 250 * 1000);
319 static void qh_destroy(struct isp1760_qh
*qh
)
321 BUG_ON(!list_empty(&qh
->qtd_list
));
322 kmem_cache_free(qh_cachep
, qh
);
325 static struct isp1760_qh
*isp1760_qh_alloc(struct isp1760_hcd
*priv
,
328 struct isp1760_qh
*qh
;
330 qh
= kmem_cache_zalloc(qh_cachep
, flags
);
334 INIT_LIST_HEAD(&qh
->qtd_list
);
339 /* magic numbers that can affect system performance */
340 #define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */
341 #define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */
342 #define EHCI_TUNE_RL_TT 0
343 #define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */
344 #define EHCI_TUNE_MULT_TT 1
345 #define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */
347 /* one-time init, only for memory state */
348 static int priv_init(struct usb_hcd
*hcd
)
350 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
353 spin_lock_init(&priv
->lock
);
356 * hw default: 1K periodic list heads, one per frame.
357 * periodic_size can shrink by USBCMD update if hcc_params allows.
359 priv
->periodic_size
= DEFAULT_I_TDPS
;
361 /* controllers may cache some of the periodic schedule ... */
362 hcc_params
= isp1760_readl(hcd
->regs
+ HC_HCCPARAMS
);
363 /* full frame cache */
364 if (HCC_ISOC_CACHE(hcc_params
))
366 else /* N microframes cached */
367 priv
->i_thresh
= 2 + HCC_ISOC_THRES(hcc_params
);
372 static int isp1760_hc_setup(struct usb_hcd
*hcd
)
374 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
378 /* Setup HW Mode Control: This assumes a level active-low interrupt */
379 hwmode
= HW_DATA_BUS_32BIT
;
381 if (priv
->devflags
& ISP1760_FLAG_BUS_WIDTH_16
)
382 hwmode
&= ~HW_DATA_BUS_32BIT
;
383 if (priv
->devflags
& ISP1760_FLAG_ANALOG_OC
)
384 hwmode
|= HW_ANA_DIGI_OC
;
385 if (priv
->devflags
& ISP1760_FLAG_DACK_POL_HIGH
)
386 hwmode
|= HW_DACK_POL_HIGH
;
387 if (priv
->devflags
& ISP1760_FLAG_DREQ_POL_HIGH
)
388 hwmode
|= HW_DREQ_POL_HIGH
;
391 * We have to set this first in case we're in 16-bit mode.
392 * Write it twice to ensure correct upper bits if switching
395 isp1760_writel(hwmode
, hcd
->regs
+ HC_HW_MODE_CTRL
);
396 isp1760_writel(hwmode
, hcd
->regs
+ HC_HW_MODE_CTRL
);
398 isp1760_writel(0xdeadbabe, hcd
->regs
+ HC_SCRATCH_REG
);
399 /* Change bus pattern */
400 scratch
= isp1760_readl(hcd
->regs
+ HC_CHIP_ID_REG
);
401 scratch
= isp1760_readl(hcd
->regs
+ HC_SCRATCH_REG
);
402 if (scratch
!= 0xdeadbabe) {
403 printk(KERN_ERR
"ISP1760: Scratch test failed.\n");
408 isp1760_init_regs(hcd
);
411 isp1760_writel(SW_RESET_RESET_ALL
, hcd
->regs
+ HC_RESET_REG
);
414 isp1760_writel(SW_RESET_RESET_HC
, hcd
->regs
+ HC_RESET_REG
);
417 result
= ehci_reset(priv
);
423 isp1760_info(priv
, "bus width: %d, oc: %s\n",
424 (priv
->devflags
& ISP1760_FLAG_BUS_WIDTH_16
) ?
425 16 : 32, (priv
->devflags
& ISP1760_FLAG_ANALOG_OC
) ?
426 "analog" : "digital");
429 isp1760_writel(hwmode
| ALL_ATX_RESET
, hcd
->regs
+ HC_HW_MODE_CTRL
);
431 isp1760_writel(hwmode
, hcd
->regs
+ HC_HW_MODE_CTRL
);
433 isp1760_writel(INTERRUPT_ENABLE_MASK
, hcd
->regs
+ HC_INTERRUPT_REG
);
434 isp1760_writel(INTERRUPT_ENABLE_MASK
, hcd
->regs
+ HC_INTERRUPT_ENABLE
);
437 * PORT 1 Control register of the ISP1760 is the OTG control
438 * register on ISP1761. Since there is no OTG or device controller
439 * support in this driver, we use port 1 as a "normal" USB host port on
442 isp1760_writel(PORT1_POWER
| PORT1_INIT2
,
443 hcd
->regs
+ HC_PORT1_CTRL
);
446 priv
->hcs_params
= isp1760_readl(hcd
->regs
+ HC_HCSPARAMS
);
448 return priv_init(hcd
);
451 static void isp1760_init_maps(struct usb_hcd
*hcd
)
453 /*set last maps, for iso its only 1, else 32 tds bitmap*/
454 isp1760_writel(0x80000000, hcd
->regs
+ HC_ATL_PTD_LASTPTD_REG
);
455 isp1760_writel(0x80000000, hcd
->regs
+ HC_INT_PTD_LASTPTD_REG
);
456 isp1760_writel(0x00000001, hcd
->regs
+ HC_ISO_PTD_LASTPTD_REG
);
459 static void isp1760_enable_interrupts(struct usb_hcd
*hcd
)
461 isp1760_writel(0, hcd
->regs
+ HC_ATL_IRQ_MASK_AND_REG
);
462 isp1760_writel(0, hcd
->regs
+ HC_ATL_IRQ_MASK_OR_REG
);
463 isp1760_writel(0, hcd
->regs
+ HC_INT_IRQ_MASK_AND_REG
);
464 isp1760_writel(0, hcd
->regs
+ HC_INT_IRQ_MASK_OR_REG
);
465 isp1760_writel(0, hcd
->regs
+ HC_ISO_IRQ_MASK_AND_REG
);
466 isp1760_writel(0xffffffff, hcd
->regs
+ HC_ISO_IRQ_MASK_OR_REG
);
470 static int isp1760_run(struct usb_hcd
*hcd
)
472 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
478 hcd
->uses_new_polling
= 1;
481 hcd
->state
= HC_STATE_RUNNING
;
482 isp1760_enable_interrupts(hcd
);
483 temp
= isp1760_readl(hcd
->regs
+ HC_HW_MODE_CTRL
);
484 isp1760_writel(temp
| HW_GLOBAL_INTR_EN
, hcd
->regs
+ HC_HW_MODE_CTRL
);
486 command
= isp1760_readl(hcd
->regs
+ HC_USBCMD
);
487 command
&= ~(CMD_LRESET
|CMD_RESET
);
489 isp1760_writel(command
, hcd
->regs
+ HC_USBCMD
);
491 retval
= handshake(priv
, hcd
->regs
+ HC_USBCMD
, CMD_RUN
, CMD_RUN
,
498 * Spec says to write FLAG_CF as last config action, priv code grabs
499 * the semaphore while doing so.
501 down_write(&ehci_cf_port_reset_rwsem
);
502 isp1760_writel(FLAG_CF
, hcd
->regs
+ HC_CONFIGFLAG
);
504 retval
= handshake(priv
, hcd
->regs
+ HC_CONFIGFLAG
, FLAG_CF
, FLAG_CF
,
506 up_write(&ehci_cf_port_reset_rwsem
);
510 chipid
= isp1760_readl(hcd
->regs
+ HC_CHIP_ID_REG
);
511 isp1760_info(priv
, "USB ISP %04x HW rev. %d started\n", chipid
& 0xffff,
514 /* PTD Register Init Part 2, Step 28 */
516 isp1760_init_maps(hcd
);
518 /* GRR this is run-once init(), being done every time the HC starts.
519 * So long as they're part of class devices, we can't do it init()
520 * since the class device isn't created that early.
525 static u32
base_to_chip(u32 base
)
527 return ((base
- 0x400) >> 3);
530 static void transform_into_atl(struct isp1760_hcd
*priv
, struct isp1760_qh
*qh
,
531 struct isp1760_qtd
*qtd
, struct urb
*urb
,
532 u32 payload
, struct ptd
*ptd
)
542 u32 nak
= NAK_COUNTER
;
544 /* according to 3.6.2, max packet len can not be > 0x400 */
545 maxpacket
= usb_maxpacket(urb
->dev
, urb
->pipe
, usb_pipeout(urb
->pipe
));
546 multi
= 1 + ((maxpacket
>> 11) & 0x3);
551 dw0
|= PTD_LENGTH(qtd
->length
);
552 dw0
|= PTD_MAXPACKET(maxpacket
);
553 dw0
|= PTD_ENDPOINT(usb_pipeendpoint(urb
->pipe
));
554 dw1
= usb_pipeendpoint(urb
->pipe
) >> 1;
557 dw1
|= PTD_DEVICE_ADDR(usb_pipedevice(urb
->pipe
));
559 pid_code
= qtd
->packet_type
;
560 dw1
|= PTD_PID_TOKEN(pid_code
);
562 if (usb_pipebulk(urb
->pipe
))
563 dw1
|= PTD_TRANS_BULK
;
564 else if (usb_pipeint(urb
->pipe
))
565 dw1
|= PTD_TRANS_INT
;
567 if (urb
->dev
->speed
!= USB_SPEED_HIGH
) {
568 /* split transaction */
570 dw1
|= PTD_TRANS_SPLIT
;
571 if (urb
->dev
->speed
== USB_SPEED_LOW
)
572 dw1
|= PTD_SE_USB_LOSPEED
;
574 dw1
|= PTD_PORT_NUM(urb
->dev
->ttport
);
575 dw1
|= PTD_HUB_NUM(urb
->dev
->tt
->hub
->devnum
);
577 /* SE bit for Split INT transfers */
578 if (usb_pipeint(urb
->pipe
) &&
579 (urb
->dev
->speed
== USB_SPEED_LOW
))
586 dw0
|= PTD_MULTI(multi
);
587 if (usb_pipecontrol(urb
->pipe
) || usb_pipebulk(urb
->pipe
))
594 dw2
|= PTD_DATA_START_ADDR(base_to_chip(payload
));
595 dw2
|= PTD_RL_CNT(rl
);
596 dw3
|= PTD_NAC_CNT(nak
);
599 if (usb_pipecontrol(urb
->pipe
))
600 dw3
|= PTD_DATA_TOGGLE(qtd
->toggle
);
607 dw3
|= PTD_CERR(ERR_COUNTER
);
609 memset(ptd
, 0, sizeof(*ptd
));
611 ptd
->dw0
= cpu_to_le32(dw0
);
612 ptd
->dw1
= cpu_to_le32(dw1
);
613 ptd
->dw2
= cpu_to_le32(dw2
);
614 ptd
->dw3
= cpu_to_le32(dw3
);
617 static void transform_add_int(struct isp1760_hcd
*priv
, struct isp1760_qh
*qh
,
618 struct isp1760_qtd
*qtd
, struct urb
*urb
,
619 u32 payload
, struct ptd
*ptd
)
628 maxpacket
= usb_maxpacket(urb
->dev
, urb
->pipe
, usb_pipeout(urb
->pipe
));
629 multi
= 1 + ((maxpacket
>> 11) & 0x3);
631 /* length of the data per uframe */
632 maxpacket
= multi
* maxpacket
;
634 numberofusofs
= urb
->transfer_buffer_length
/ maxpacket
;
635 if (urb
->transfer_buffer_length
% maxpacket
)
640 for (i
= 0; i
< numberofusofs
; i
++) {
645 if (urb
->dev
->speed
!= USB_SPEED_HIGH
) {
647 ptd
->dw5
= __constant_cpu_to_le32(0x1c);
649 if (qh
->period
>= 32)
650 period
= qh
->period
/ 2;
657 period
= qh
->period
/8;
664 if (qh
->period
>= 8) {
665 /* millisecond period */
666 period
= (period
<< 3);
668 /* usof based tranmsfers */
669 /* minimum 4 usofs */
674 ptd
->dw2
|= cpu_to_le32(period
);
675 ptd
->dw4
= cpu_to_le32(usof
);
678 static void transform_into_int(struct isp1760_hcd
*priv
, struct isp1760_qh
*qh
,
679 struct isp1760_qtd
*qtd
, struct urb
*urb
,
680 u32 payload
, struct ptd
*ptd
)
682 transform_into_atl(priv
, qh
, qtd
, urb
, payload
, ptd
);
683 transform_add_int(priv
, qh
, qtd
, urb
, payload
, ptd
);
686 static int qtd_fill(struct isp1760_qtd
*qtd
, void *databuffer
, size_t len
,
691 qtd
->data_buffer
= databuffer
;
692 qtd
->packet_type
= GET_QTD_TOKEN_TYPE(token
);
693 qtd
->toggle
= GET_DATA_TOGGLE(token
);
695 if (len
> HC_ATL_PL_SIZE
)
696 count
= HC_ATL_PL_SIZE
;
704 static int check_error(struct ptd
*ptd
)
709 dw3
= le32_to_cpu(ptd
->dw3
);
710 if (dw3
& DW3_HALT_BIT
)
713 if (dw3
& DW3_ERROR_BIT
) {
714 printk(KERN_ERR
"error bit is set in DW3\n");
718 if (dw3
& DW3_QTD_ACTIVE
) {
719 printk(KERN_ERR
"transfer active bit is set DW3\n");
720 printk(KERN_ERR
"nak counter: %d, rl: %d\n", (dw3
>> 19) & 0xf,
721 (le32_to_cpu(ptd
->dw2
) >> 25) & 0xf);
727 static void check_int_err_status(u32 dw4
)
733 for (i
= 0; i
< 8; i
++) {
736 printk(KERN_ERR
"ERROR: under run , %d\n", i
);
740 printk(KERN_ERR
"ERROR: transaction error, %d\n", i
);
744 printk(KERN_ERR
"ERROR: babble error, %d\n", i
);
751 static void enqueue_one_qtd(struct isp1760_qtd
*qtd
, struct isp1760_hcd
*priv
,
755 struct usb_hcd
*hcd
= priv_to_hcd(priv
);
757 token
= qtd
->packet_type
;
759 if (qtd
->length
&& (qtd
->length
<= HC_ATL_PL_SIZE
)) {
765 priv_write_copy(priv
, qtd
->data_buffer
,
772 static void enqueue_one_atl_qtd(u32 atl_regs
, u32 payload
,
773 struct isp1760_hcd
*priv
, struct isp1760_qh
*qh
,
774 struct urb
*urb
, u32 slot
, struct isp1760_qtd
*qtd
)
777 struct usb_hcd
*hcd
= priv_to_hcd(priv
);
779 transform_into_atl(priv
, qh
, qtd
, urb
, payload
, &ptd
);
780 priv_write_copy(priv
, (u32
*)&ptd
, hcd
->regs
+ atl_regs
, sizeof(ptd
));
781 enqueue_one_qtd(qtd
, priv
, payload
);
783 priv
->atl_ints
[slot
].urb
= urb
;
784 priv
->atl_ints
[slot
].qh
= qh
;
785 priv
->atl_ints
[slot
].qtd
= qtd
;
786 priv
->atl_ints
[slot
].data_buffer
= qtd
->data_buffer
;
787 priv
->atl_ints
[slot
].payload
= payload
;
788 qtd
->status
|= URB_ENQUEUED
| URB_TYPE_ATL
;
789 qtd
->status
|= slot
<< 16;
792 static void enqueue_one_int_qtd(u32 int_regs
, u32 payload
,
793 struct isp1760_hcd
*priv
, struct isp1760_qh
*qh
,
794 struct urb
*urb
, u32 slot
, struct isp1760_qtd
*qtd
)
797 struct usb_hcd
*hcd
= priv_to_hcd(priv
);
799 transform_into_int(priv
, qh
, qtd
, urb
, payload
, &ptd
);
800 priv_write_copy(priv
, (u32
*)&ptd
, hcd
->regs
+ int_regs
, sizeof(ptd
));
801 enqueue_one_qtd(qtd
, priv
, payload
);
803 priv
->int_ints
[slot
].urb
= urb
;
804 priv
->int_ints
[slot
].qh
= qh
;
805 priv
->int_ints
[slot
].qtd
= qtd
;
806 priv
->int_ints
[slot
].data_buffer
= qtd
->data_buffer
;
807 priv
->int_ints
[slot
].payload
= payload
;
808 qtd
->status
|= URB_ENQUEUED
| URB_TYPE_INT
;
809 qtd
->status
|= slot
<< 16;
812 static void enqueue_an_ATL_packet(struct usb_hcd
*hcd
, struct isp1760_qh
*qh
,
813 struct isp1760_qtd
*qtd
)
815 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
816 u32 skip_map
, or_map
;
819 u32 atl_regs
, payload
;
822 skip_map
= isp1760_readl(hcd
->regs
+ HC_ATL_PTD_SKIPMAP_REG
);
825 slot
= __ffs(skip_map
);
826 queue_entry
= 1 << slot
;
828 atl_regs
= ATL_REGS_OFFSET
+ slot
* sizeof(struct ptd
);
830 payload
= alloc_mem(priv
, qtd
->length
);
832 enqueue_one_atl_qtd(atl_regs
, payload
, priv
, qh
, qtd
->urb
, slot
, qtd
);
834 or_map
= isp1760_readl(hcd
->regs
+ HC_ATL_IRQ_MASK_OR_REG
);
835 or_map
|= queue_entry
;
836 isp1760_writel(or_map
, hcd
->regs
+ HC_ATL_IRQ_MASK_OR_REG
);
838 skip_map
&= ~queue_entry
;
839 isp1760_writel(skip_map
, hcd
->regs
+ HC_ATL_PTD_SKIPMAP_REG
);
841 buffstatus
= isp1760_readl(hcd
->regs
+ HC_BUFFER_STATUS_REG
);
842 buffstatus
|= ATL_BUFFER
;
843 isp1760_writel(buffstatus
, hcd
->regs
+ HC_BUFFER_STATUS_REG
);
846 static void enqueue_an_INT_packet(struct usb_hcd
*hcd
, struct isp1760_qh
*qh
,
847 struct isp1760_qtd
*qtd
)
849 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
850 u32 skip_map
, or_map
;
853 u32 int_regs
, payload
;
856 skip_map
= isp1760_readl(hcd
->regs
+ HC_INT_PTD_SKIPMAP_REG
);
859 slot
= __ffs(skip_map
);
860 queue_entry
= 1 << slot
;
862 int_regs
= INT_REGS_OFFSET
+ slot
* sizeof(struct ptd
);
864 payload
= alloc_mem(priv
, qtd
->length
);
866 enqueue_one_int_qtd(int_regs
, payload
, priv
, qh
, qtd
->urb
, slot
, qtd
);
868 or_map
= isp1760_readl(hcd
->regs
+ HC_INT_IRQ_MASK_OR_REG
);
869 or_map
|= queue_entry
;
870 isp1760_writel(or_map
, hcd
->regs
+ HC_INT_IRQ_MASK_OR_REG
);
872 skip_map
&= ~queue_entry
;
873 isp1760_writel(skip_map
, hcd
->regs
+ HC_INT_PTD_SKIPMAP_REG
);
875 buffstatus
= isp1760_readl(hcd
->regs
+ HC_BUFFER_STATUS_REG
);
876 buffstatus
|= INT_BUFFER
;
877 isp1760_writel(buffstatus
, hcd
->regs
+ HC_BUFFER_STATUS_REG
);
880 static void isp1760_urb_done(struct isp1760_hcd
*priv
, struct urb
*urb
, int status
)
881 __releases(priv
->lock
)
882 __acquires(priv
->lock
)
884 if (!urb
->unlinked
) {
885 if (status
== -EINPROGRESS
)
889 /* complete() can reenter this HCD */
890 usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv
), urb
);
891 spin_unlock(&priv
->lock
);
892 usb_hcd_giveback_urb(priv_to_hcd(priv
), urb
, status
);
893 spin_lock(&priv
->lock
);
896 static void isp1760_qtd_free(struct isp1760_qtd
*qtd
)
898 kmem_cache_free(qtd_cachep
, qtd
);
901 static struct isp1760_qtd
*clean_this_qtd(struct isp1760_qtd
*qtd
)
903 struct isp1760_qtd
*tmp_qtd
;
905 tmp_qtd
= qtd
->hw_next
;
906 list_del(&qtd
->qtd_list
);
907 isp1760_qtd_free(qtd
);
912 * Remove this QTD from the QH list and free its memory. If this QTD
913 * isn't the last one than remove also his successor(s).
914 * Returns the QTD which is part of an new URB and should be enqueued.
916 static struct isp1760_qtd
*clean_up_qtdlist(struct isp1760_qtd
*qtd
)
918 struct isp1760_qtd
*tmp_qtd
;
922 tmp_qtd
= qtd
->hw_next
;
923 last_one
= qtd
->status
& URB_COMPLETE_NOTIFY
;
924 list_del(&qtd
->qtd_list
);
925 isp1760_qtd_free(qtd
);
927 } while (!last_one
&& qtd
);
932 static void do_atl_int(struct usb_hcd
*usb_hcd
)
934 struct isp1760_hcd
*priv
= hcd_to_priv(usb_hcd
);
935 u32 done_map
, skip_map
;
937 struct urb
*urb
= NULL
;
944 u32 status
= -EINVAL
;
946 struct isp1760_qtd
*qtd
;
947 struct isp1760_qh
*qh
;
951 done_map
= isp1760_readl(usb_hcd
->regs
+
952 HC_ATL_PTD_DONEMAP_REG
);
953 skip_map
= isp1760_readl(usb_hcd
->regs
+
954 HC_ATL_PTD_SKIPMAP_REG
);
956 or_map
= isp1760_readl(usb_hcd
->regs
+ HC_ATL_IRQ_MASK_OR_REG
);
958 isp1760_writel(or_map
, usb_hcd
->regs
+ HC_ATL_IRQ_MASK_OR_REG
);
960 atl_regs_base
= ATL_REGS_OFFSET
;
968 queue_entry
= __ffs(done_map
);
969 done_map
&= ~(1 << queue_entry
);
970 skip_map
|= 1 << queue_entry
;
972 atl_regs
= atl_regs_base
+ queue_entry
* sizeof(struct ptd
);
974 urb
= priv
->atl_ints
[queue_entry
].urb
;
975 qtd
= priv
->atl_ints
[queue_entry
].qtd
;
976 qh
= priv
->atl_ints
[queue_entry
].qh
;
977 payload
= priv
->atl_ints
[queue_entry
].payload
;
980 printk(KERN_ERR
"qh is 0\n");
983 isp1760_writel(atl_regs
+ ISP_BANK(0), usb_hcd
->regs
+
985 isp1760_writel(payload
+ ISP_BANK(1), usb_hcd
->regs
+
988 * write bank1 address twice to ensure the 90ns delay (time
989 * between BANK0 write and the priv_read_copy() call is at
990 * least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 109ns)
992 isp1760_writel(payload
+ ISP_BANK(1), usb_hcd
->regs
+
995 priv_read_copy(priv
, (u32
*)&ptd
, usb_hcd
->regs
+ atl_regs
+
996 ISP_BANK(0), sizeof(ptd
));
998 dw1
= le32_to_cpu(ptd
.dw1
);
999 dw2
= le32_to_cpu(ptd
.dw2
);
1000 dw3
= le32_to_cpu(ptd
.dw3
);
1001 rl
= (dw2
>> 25) & 0x0f;
1002 nakcount
= (dw3
>> 19) & 0xf;
1004 /* Transfer Error, *but* active and no HALT -> reload */
1005 if ((dw3
& DW3_ERROR_BIT
) && (dw3
& DW3_QTD_ACTIVE
) &&
1006 !(dw3
& DW3_HALT_BIT
)) {
1008 /* according to ppriv code, we have to
1009 * reload this one if trasfered bytes != requested bytes
1010 * else act like everything went smooth..
1011 * XXX This just doesn't feel right and hasn't
1015 length
= PTD_XFERRED_LENGTH(dw3
);
1016 printk(KERN_ERR
"Should reload now.... transfered %d "
1017 "of %zu\n", length
, qtd
->length
);
1021 if (!nakcount
&& (dw3
& DW3_QTD_ACTIVE
)) {
1025 * NAKs are handled in HW by the chip. Usually if the
1026 * device is not able to send data fast enough.
1027 * This did not trigger for a long time now.
1029 printk(KERN_ERR
"Reloading ptd %p/%p... qh %p readed: "
1030 "%d of %zu done: %08x cur: %08x\n", qtd
,
1031 urb
, qh
, PTD_XFERRED_LENGTH(dw3
),
1032 qtd
->length
, done_map
,
1033 (1 << queue_entry
));
1035 /* RL counter = ERR counter */
1036 dw3
&= ~(0xf << 19);
1038 dw3
&= ~(3 << (55 - 32));
1039 dw3
|= ERR_COUNTER
<< (55 - 32);
1042 * It is not needed to write skip map back because it
1043 * is unchanged. Just make sure that this entry is
1044 * unskipped once it gets written to the HW.
1046 skip_map
&= ~(1 << queue_entry
);
1047 or_map
= isp1760_readl(usb_hcd
->regs
+
1048 HC_ATL_IRQ_MASK_OR_REG
);
1049 or_map
|= 1 << queue_entry
;
1050 isp1760_writel(or_map
, usb_hcd
->regs
+
1051 HC_ATL_IRQ_MASK_OR_REG
);
1053 ptd
.dw3
= cpu_to_le32(dw3
);
1054 priv_write_copy(priv
, (u32
*)&ptd
, usb_hcd
->regs
+
1055 atl_regs
, sizeof(ptd
));
1057 ptd
.dw0
|= __constant_cpu_to_le32(PTD_VALID
);
1058 priv_write_copy(priv
, (u32
*)&ptd
, usb_hcd
->regs
+
1059 atl_regs
, sizeof(ptd
));
1061 buffstatus
= isp1760_readl(usb_hcd
->regs
+
1062 HC_BUFFER_STATUS_REG
);
1063 buffstatus
|= ATL_BUFFER
;
1064 isp1760_writel(buffstatus
, usb_hcd
->regs
+
1065 HC_BUFFER_STATUS_REG
);
1069 error
= check_error(&ptd
);
1072 priv
->atl_ints
[queue_entry
].qh
->toggle
= 0;
1073 priv
->atl_ints
[queue_entry
].qh
->ping
= 0;
1074 urb
->status
= -EPIPE
;
1077 printk(KERN_ERR
"Error in %s().\n", __func__
);
1078 printk(KERN_ERR
"IN dw0: %08x dw1: %08x dw2: %08x "
1079 "dw3: %08x dw4: %08x dw5: %08x dw6: "
1081 ptd
.dw0
, ptd
.dw1
, ptd
.dw2
, ptd
.dw3
,
1082 ptd
.dw4
, ptd
.dw5
, ptd
.dw6
, ptd
.dw7
);
1085 if (usb_pipetype(urb
->pipe
) == PIPE_BULK
) {
1086 priv
->atl_ints
[queue_entry
].qh
->toggle
= dw3
&
1088 priv
->atl_ints
[queue_entry
].qh
->ping
= dw3
&
1093 length
= PTD_XFERRED_LENGTH(dw3
);
1095 switch (DW1_GET_PID(dw1
)) {
1097 priv_read_copy(priv
,
1098 priv
->atl_ints
[queue_entry
].data_buffer
,
1099 usb_hcd
->regs
+ payload
+ ISP_BANK(1),
1104 urb
->actual_length
+= length
;
1111 priv
->atl_ints
[queue_entry
].data_buffer
= NULL
;
1112 priv
->atl_ints
[queue_entry
].urb
= NULL
;
1113 priv
->atl_ints
[queue_entry
].qtd
= NULL
;
1114 priv
->atl_ints
[queue_entry
].qh
= NULL
;
1116 free_mem(priv
, payload
);
1118 isp1760_writel(skip_map
, usb_hcd
->regs
+
1119 HC_ATL_PTD_SKIPMAP_REG
);
1121 if (urb
->status
== -EPIPE
) {
1122 /* HALT was received */
1124 qtd
= clean_up_qtdlist(qtd
);
1125 isp1760_urb_done(priv
, urb
, urb
->status
);
1127 } else if (usb_pipebulk(urb
->pipe
) && (length
< qtd
->length
)) {
1128 /* short BULK received */
1130 if (urb
->transfer_flags
& URB_SHORT_NOT_OK
) {
1131 urb
->status
= -EREMOTEIO
;
1132 isp1760_dbg(priv
, "short bulk, %d instead %zu "
1133 "with URB_SHORT_NOT_OK flag.\n",
1134 length
, qtd
->length
);
1137 if (urb
->status
== -EINPROGRESS
)
1140 qtd
= clean_up_qtdlist(qtd
);
1142 isp1760_urb_done(priv
, urb
, urb
->status
);
1144 } else if (qtd
->status
& URB_COMPLETE_NOTIFY
) {
1145 /* that was the last qtd of that URB */
1147 if (urb
->status
== -EINPROGRESS
)
1150 qtd
= clean_this_qtd(qtd
);
1151 isp1760_urb_done(priv
, urb
, urb
->status
);
1154 /* next QTD of this URB */
1156 qtd
= clean_this_qtd(qtd
);
1161 enqueue_an_ATL_packet(usb_hcd
, qh
, qtd
);
1163 skip_map
= isp1760_readl(usb_hcd
->regs
+
1164 HC_ATL_PTD_SKIPMAP_REG
);
1168 static void do_intl_int(struct usb_hcd
*usb_hcd
)
1170 struct isp1760_hcd
*priv
= hcd_to_priv(usb_hcd
);
1171 u32 done_map
, skip_map
;
1173 struct urb
*urb
= NULL
;
1181 struct isp1760_qtd
*qtd
;
1182 struct isp1760_qh
*qh
;
1184 done_map
= isp1760_readl(usb_hcd
->regs
+
1185 HC_INT_PTD_DONEMAP_REG
);
1186 skip_map
= isp1760_readl(usb_hcd
->regs
+
1187 HC_INT_PTD_SKIPMAP_REG
);
1189 or_map
= isp1760_readl(usb_hcd
->regs
+ HC_INT_IRQ_MASK_OR_REG
);
1190 or_map
&= ~done_map
;
1191 isp1760_writel(or_map
, usb_hcd
->regs
+ HC_INT_IRQ_MASK_OR_REG
);
1193 int_regs_base
= INT_REGS_OFFSET
;
1199 queue_entry
= __ffs(done_map
);
1200 done_map
&= ~(1 << queue_entry
);
1201 skip_map
|= 1 << queue_entry
;
1203 int_regs
= int_regs_base
+ queue_entry
* sizeof(struct ptd
);
1204 urb
= priv
->int_ints
[queue_entry
].urb
;
1205 qtd
= priv
->int_ints
[queue_entry
].qtd
;
1206 qh
= priv
->int_ints
[queue_entry
].qh
;
1207 payload
= priv
->int_ints
[queue_entry
].payload
;
1210 printk(KERN_ERR
"(INT) qh is 0\n");
1214 isp1760_writel(int_regs
+ ISP_BANK(0), usb_hcd
->regs
+
1216 isp1760_writel(payload
+ ISP_BANK(1), usb_hcd
->regs
+
1219 * write bank1 address twice to ensure the 90ns delay (time
1220 * between BANK0 write and the priv_read_copy() call is at
1221 * least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 92ns)
1223 isp1760_writel(payload
+ ISP_BANK(1), usb_hcd
->regs
+
1226 priv_read_copy(priv
, (u32
*)&ptd
, usb_hcd
->regs
+ int_regs
+
1227 ISP_BANK(0), sizeof(ptd
));
1228 dw1
= le32_to_cpu(ptd
.dw1
);
1229 dw3
= le32_to_cpu(ptd
.dw3
);
1230 check_int_err_status(le32_to_cpu(ptd
.dw4
));
1232 error
= check_error(&ptd
);
1235 printk(KERN_ERR
"Error in %s().\n", __func__
);
1236 printk(KERN_ERR
"IN dw0: %08x dw1: %08x dw2: %08x "
1237 "dw3: %08x dw4: %08x dw5: %08x dw6: "
1239 ptd
.dw0
, ptd
.dw1
, ptd
.dw2
, ptd
.dw3
,
1240 ptd
.dw4
, ptd
.dw5
, ptd
.dw6
, ptd
.dw7
);
1242 urb
->status
= -EPIPE
;
1243 priv
->int_ints
[queue_entry
].qh
->toggle
= 0;
1244 priv
->int_ints
[queue_entry
].qh
->ping
= 0;
1247 priv
->int_ints
[queue_entry
].qh
->toggle
=
1249 priv
->int_ints
[queue_entry
].qh
->ping
= dw3
& (1 << 26);
1252 if (urb
->dev
->speed
!= USB_SPEED_HIGH
)
1253 length
= PTD_XFERRED_LENGTH_LO(dw3
);
1255 length
= PTD_XFERRED_LENGTH(dw3
);
1258 switch (DW1_GET_PID(dw1
)) {
1260 priv_read_copy(priv
,
1261 priv
->int_ints
[queue_entry
].data_buffer
,
1262 usb_hcd
->regs
+ payload
+ ISP_BANK(1),
1266 urb
->actual_length
+= length
;
1273 priv
->int_ints
[queue_entry
].data_buffer
= NULL
;
1274 priv
->int_ints
[queue_entry
].urb
= NULL
;
1275 priv
->int_ints
[queue_entry
].qtd
= NULL
;
1276 priv
->int_ints
[queue_entry
].qh
= NULL
;
1278 isp1760_writel(skip_map
, usb_hcd
->regs
+
1279 HC_INT_PTD_SKIPMAP_REG
);
1280 free_mem(priv
, payload
);
1282 if (urb
->status
== -EPIPE
) {
1285 qtd
= clean_up_qtdlist(qtd
);
1286 isp1760_urb_done(priv
, urb
, urb
->status
);
1288 } else if (qtd
->status
& URB_COMPLETE_NOTIFY
) {
1290 if (urb
->status
== -EINPROGRESS
)
1293 qtd
= clean_this_qtd(qtd
);
1294 isp1760_urb_done(priv
, urb
, urb
->status
);
1297 /* next QTD of this URB */
1299 qtd
= clean_this_qtd(qtd
);
1304 enqueue_an_INT_packet(usb_hcd
, qh
, qtd
);
1306 skip_map
= isp1760_readl(usb_hcd
->regs
+
1307 HC_INT_PTD_SKIPMAP_REG
);
1311 #define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
1312 static struct isp1760_qh
*qh_make(struct isp1760_hcd
*priv
, struct urb
*urb
,
1315 struct isp1760_qh
*qh
;
1318 qh
= isp1760_qh_alloc(priv
, flags
);
1323 * init endpoint/device data for this QH
1325 is_input
= usb_pipein(urb
->pipe
);
1326 type
= usb_pipetype(urb
->pipe
);
1328 if (type
== PIPE_INTERRUPT
) {
1330 if (urb
->dev
->speed
== USB_SPEED_HIGH
) {
1332 qh
->period
= urb
->interval
>> 3;
1333 if (qh
->period
== 0 && urb
->interval
!= 1) {
1334 /* NOTE interval 2 or 4 uframes could work.
1335 * But interval 1 scheduling is simpler, and
1336 * includes high bandwidth.
1338 printk(KERN_ERR
"intr period %d uframes, NYET!",
1344 qh
->period
= urb
->interval
;
1348 /* support for tt scheduling, and access to toggles */
1351 if (!usb_pipecontrol(urb
->pipe
))
1352 usb_settoggle(urb
->dev
, usb_pipeendpoint(urb
->pipe
), !is_input
,
1358 * For control/bulk/interrupt, return QH with these TDs appended.
1359 * Allocates and initializes the QH if necessary.
1360 * Returns null if it can't allocate a QH it needs to.
1361 * If the QH has TDs (urbs) already, that's great.
1363 static struct isp1760_qh
*qh_append_tds(struct isp1760_hcd
*priv
,
1364 struct urb
*urb
, struct list_head
*qtd_list
, int epnum
,
1367 struct isp1760_qh
*qh
;
1368 struct isp1760_qtd
*qtd
;
1369 struct isp1760_qtd
*prev_qtd
;
1371 qh
= (struct isp1760_qh
*)*ptr
;
1373 /* can't sleep here, we have priv->lock... */
1374 qh
= qh_make(priv
, urb
, GFP_ATOMIC
);
1380 qtd
= list_entry(qtd_list
->next
, struct isp1760_qtd
,
1382 if (!list_empty(&qh
->qtd_list
))
1383 prev_qtd
= list_entry(qh
->qtd_list
.prev
,
1384 struct isp1760_qtd
, qtd_list
);
1388 list_splice(qtd_list
, qh
->qtd_list
.prev
);
1390 BUG_ON(prev_qtd
->hw_next
);
1391 prev_qtd
->hw_next
= qtd
;
1398 static void qtd_list_free(struct isp1760_hcd
*priv
, struct urb
*urb
,
1399 struct list_head
*qtd_list
)
1401 struct list_head
*entry
, *temp
;
1403 list_for_each_safe(entry
, temp
, qtd_list
) {
1404 struct isp1760_qtd
*qtd
;
1406 qtd
= list_entry(entry
, struct isp1760_qtd
, qtd_list
);
1407 list_del(&qtd
->qtd_list
);
1408 isp1760_qtd_free(qtd
);
1412 static int isp1760_prepare_enqueue(struct isp1760_hcd
*priv
, struct urb
*urb
,
1413 struct list_head
*qtd_list
, gfp_t mem_flags
, packet_enqueue
*p
)
1415 struct isp1760_qtd
*qtd
;
1417 unsigned long flags
;
1418 struct isp1760_qh
*qh
= NULL
;
1422 qtd
= list_entry(qtd_list
->next
, struct isp1760_qtd
, qtd_list
);
1423 epnum
= urb
->ep
->desc
.bEndpointAddress
;
1425 spin_lock_irqsave(&priv
->lock
, flags
);
1426 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &priv_to_hcd(priv
)->flags
)) {
1430 rc
= usb_hcd_link_urb_to_ep(priv_to_hcd(priv
), urb
);
1434 qh
= urb
->ep
->hcpriv
;
1436 qh_busy
= !list_empty(&qh
->qtd_list
);
1440 qh
= qh_append_tds(priv
, urb
, qtd_list
, epnum
, &urb
->ep
->hcpriv
);
1442 usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv
), urb
);
1448 p(priv_to_hcd(priv
), qh
, qtd
);
1451 spin_unlock_irqrestore(&priv
->lock
, flags
);
1453 qtd_list_free(priv
, urb
, qtd_list
);
1457 static struct isp1760_qtd
*isp1760_qtd_alloc(struct isp1760_hcd
*priv
,
1460 struct isp1760_qtd
*qtd
;
1462 qtd
= kmem_cache_zalloc(qtd_cachep
, flags
);
1464 INIT_LIST_HEAD(&qtd
->qtd_list
);
1470 * create a list of filled qtds for this URB; won't link into qh.
1472 static struct list_head
*qh_urb_transaction(struct isp1760_hcd
*priv
,
1473 struct urb
*urb
, struct list_head
*head
, gfp_t flags
)
1475 struct isp1760_qtd
*qtd
, *qtd_prev
;
1482 * URBs map to sequences of QTDs: one logical transaction
1484 qtd
= isp1760_qtd_alloc(priv
, flags
);
1488 list_add_tail(&qtd
->qtd_list
, head
);
1490 urb
->status
= -EINPROGRESS
;
1493 /* for split transactions, SplitXState initialized to zero */
1495 len
= urb
->transfer_buffer_length
;
1496 is_input
= usb_pipein(urb
->pipe
);
1497 if (usb_pipecontrol(urb
->pipe
)) {
1499 qtd_fill(qtd
, urb
->setup_packet
,
1500 sizeof(struct usb_ctrlrequest
),
1503 /* ... and always at least one more pid */
1504 token
^= DATA_TOGGLE
;
1506 qtd
= isp1760_qtd_alloc(priv
, flags
);
1510 qtd_prev
->hw_next
= qtd
;
1511 list_add_tail(&qtd
->qtd_list
, head
);
1513 /* for zero length DATA stages, STATUS is always IN */
1519 * data transfer stage: buffer setup
1521 buf
= urb
->transfer_buffer
;
1528 maxpacket
= max_packet(usb_maxpacket(urb
->dev
, urb
->pipe
, !is_input
));
1531 * buffer gets wrapped in one or more qtds;
1532 * last one may be "short" (including zero len)
1533 * and may serve as a control status ack
1539 /* XXX This looks like usb storage / SCSI bug */
1540 printk(KERN_ERR
"buf is null, dma is %08lx len is %d\n",
1541 (long unsigned)urb
->transfer_dma
, len
);
1545 this_qtd_len
= qtd_fill(qtd
, buf
, len
, token
);
1546 len
-= this_qtd_len
;
1547 buf
+= this_qtd_len
;
1549 /* qh makes control packets use qtd toggle; maybe switch it */
1550 if ((maxpacket
& (this_qtd_len
+ (maxpacket
- 1))) == 0)
1551 token
^= DATA_TOGGLE
;
1557 qtd
= isp1760_qtd_alloc(priv
, flags
);
1561 qtd_prev
->hw_next
= qtd
;
1562 list_add_tail(&qtd
->qtd_list
, head
);
1566 * control requests may need a terminating data "status" ack;
1567 * bulk ones may need a terminating short packet (zero length).
1569 if (urb
->transfer_buffer_length
!= 0) {
1572 if (usb_pipecontrol(urb
->pipe
)) {
1574 /* "in" <--> "out" */
1577 token
|= DATA_TOGGLE
;
1578 } else if (usb_pipebulk(urb
->pipe
)
1579 && (urb
->transfer_flags
& URB_ZERO_PACKET
)
1580 && !(urb
->transfer_buffer_length
% maxpacket
)) {
1585 qtd
= isp1760_qtd_alloc(priv
, flags
);
1589 qtd_prev
->hw_next
= qtd
;
1590 list_add_tail(&qtd
->qtd_list
, head
);
1592 /* never any data in such packets */
1593 qtd_fill(qtd
, NULL
, 0, token
);
1597 qtd
->status
= URB_COMPLETE_NOTIFY
;
1601 qtd_list_free(priv
, urb
, head
);
1605 static int isp1760_urb_enqueue(struct usb_hcd
*hcd
, struct urb
*urb
,
1608 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
1609 struct list_head qtd_list
;
1612 INIT_LIST_HEAD(&qtd_list
);
1614 switch (usb_pipetype(urb
->pipe
)) {
1618 if (!qh_urb_transaction(priv
, urb
, &qtd_list
, mem_flags
))
1620 pe
= enqueue_an_ATL_packet
;
1623 case PIPE_INTERRUPT
:
1624 if (!qh_urb_transaction(priv
, urb
, &qtd_list
, mem_flags
))
1626 pe
= enqueue_an_INT_packet
;
1629 case PIPE_ISOCHRONOUS
:
1630 printk(KERN_ERR
"PIPE_ISOCHRONOUS ain't supported\n");
1635 return isp1760_prepare_enqueue(priv
, urb
, &qtd_list
, mem_flags
, pe
);
1638 static int isp1760_urb_dequeue(struct usb_hcd
*hcd
, struct urb
*urb
,
1641 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
1642 struct inter_packet_info
*ints
;
1644 u32 reg_base
, or_reg
, skip_reg
;
1645 unsigned long flags
;
1649 switch (usb_pipetype(urb
->pipe
)) {
1650 case PIPE_ISOCHRONOUS
:
1654 case PIPE_INTERRUPT
:
1655 ints
= priv
->int_ints
;
1656 reg_base
= INT_REGS_OFFSET
;
1657 or_reg
= HC_INT_IRQ_MASK_OR_REG
;
1658 skip_reg
= HC_INT_PTD_SKIPMAP_REG
;
1659 pe
= enqueue_an_INT_packet
;
1663 ints
= priv
->atl_ints
;
1664 reg_base
= ATL_REGS_OFFSET
;
1665 or_reg
= HC_ATL_IRQ_MASK_OR_REG
;
1666 skip_reg
= HC_ATL_PTD_SKIPMAP_REG
;
1667 pe
= enqueue_an_ATL_packet
;
1671 memset(&ptd
, 0, sizeof(ptd
));
1672 spin_lock_irqsave(&priv
->lock
, flags
);
1674 for (i
= 0; i
< 32; i
++) {
1675 if (ints
->urb
== urb
) {
1678 struct isp1760_qtd
*qtd
;
1679 struct isp1760_qh
*qh
= ints
->qh
;
1681 skip_map
= isp1760_readl(hcd
->regs
+ skip_reg
);
1683 isp1760_writel(skip_map
, hcd
->regs
+ skip_reg
);
1685 or_map
= isp1760_readl(hcd
->regs
+ or_reg
);
1686 or_map
&= ~(1 << i
);
1687 isp1760_writel(or_map
, hcd
->regs
+ or_reg
);
1689 priv_write_copy(priv
, (u32
*)&ptd
, hcd
->regs
+ reg_base
1690 + i
* sizeof(ptd
), sizeof(ptd
));
1692 qtd
= clean_up_qtdlist(qtd
);
1694 free_mem(priv
, ints
->payload
);
1699 ints
->data_buffer
= NULL
;
1702 isp1760_urb_done(priv
, urb
, status
);
1707 } else if (ints
->qtd
) {
1708 struct isp1760_qtd
*qtd
, *prev_qtd
= ints
->qtd
;
1710 for (qtd
= ints
->qtd
->hw_next
; qtd
; qtd
= qtd
->hw_next
) {
1711 if (qtd
->urb
== urb
) {
1712 prev_qtd
->hw_next
= clean_up_qtdlist(qtd
);
1713 isp1760_urb_done(priv
, urb
, status
);
1718 /* we found the urb before the end of the list */
1725 spin_unlock_irqrestore(&priv
->lock
, flags
);
1729 static irqreturn_t
isp1760_irq(struct usb_hcd
*usb_hcd
)
1731 struct isp1760_hcd
*priv
= hcd_to_priv(usb_hcd
);
1733 irqreturn_t irqret
= IRQ_NONE
;
1735 spin_lock(&priv
->lock
);
1737 if (!(usb_hcd
->state
& HC_STATE_RUNNING
))
1740 imask
= isp1760_readl(usb_hcd
->regs
+ HC_INTERRUPT_REG
);
1741 if (unlikely(!imask
))
1744 isp1760_writel(imask
, usb_hcd
->regs
+ HC_INTERRUPT_REG
);
1745 if (imask
& HC_ATL_INT
)
1746 do_atl_int(usb_hcd
);
1748 if (imask
& HC_INTL_INT
)
1749 do_intl_int(usb_hcd
);
1751 irqret
= IRQ_HANDLED
;
1753 spin_unlock(&priv
->lock
);
1757 static int isp1760_hub_status_data(struct usb_hcd
*hcd
, char *buf
)
1759 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
1760 u32 temp
, status
= 0;
1763 unsigned long flags
;
1765 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
1766 if (!HC_IS_RUNNING(hcd
->state
))
1769 /* init status to no-changes */
1773 spin_lock_irqsave(&priv
->lock
, flags
);
1774 temp
= isp1760_readl(hcd
->regs
+ HC_PORTSC1
);
1776 if (temp
& PORT_OWNER
) {
1777 if (temp
& PORT_CSC
) {
1779 isp1760_writel(temp
, hcd
->regs
+ HC_PORTSC1
);
1785 * Return status information even for ports with OWNER set.
1786 * Otherwise khubd wouldn't see the disconnect event when a
1787 * high-speed device is switched over to the companion
1788 * controller by the user.
1791 if ((temp
& mask
) != 0
1792 || ((temp
& PORT_RESUME
) != 0
1793 && time_after_eq(jiffies
,
1794 priv
->reset_done
))) {
1795 buf
[0] |= 1 << (0 + 1);
1798 /* FIXME autosuspend idle root hubs */
1800 spin_unlock_irqrestore(&priv
->lock
, flags
);
1801 return status
? retval
: 0;
1804 static void isp1760_hub_descriptor(struct isp1760_hcd
*priv
,
1805 struct usb_hub_descriptor
*desc
)
1807 int ports
= HCS_N_PORTS(priv
->hcs_params
);
1810 desc
->bDescriptorType
= 0x29;
1811 /* priv 1.0, 2.3.9 says 20ms max */
1812 desc
->bPwrOn2PwrGood
= 10;
1813 desc
->bHubContrCurrent
= 0;
1815 desc
->bNbrPorts
= ports
;
1816 temp
= 1 + (ports
/ 8);
1817 desc
->bDescLength
= 7 + 2 * temp
;
1819 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
1820 memset(&desc
->bitmap
[0], 0, temp
);
1821 memset(&desc
->bitmap
[temp
], 0xff, temp
);
1823 /* per-port overcurrent reporting */
1825 if (HCS_PPC(priv
->hcs_params
))
1826 /* per-port power control */
1829 /* no power switching */
1831 desc
->wHubCharacteristics
= cpu_to_le16(temp
);
1834 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
1836 static int check_reset_complete(struct isp1760_hcd
*priv
, int index
,
1837 u32 __iomem
*status_reg
, int port_status
)
1839 if (!(port_status
& PORT_CONNECT
))
1842 /* if reset finished and it's still not enabled -- handoff */
1843 if (!(port_status
& PORT_PE
)) {
1845 printk(KERN_ERR
"port %d full speed --> companion\n",
1848 port_status
|= PORT_OWNER
;
1849 port_status
&= ~PORT_RWC_BITS
;
1850 isp1760_writel(port_status
, status_reg
);
1853 printk(KERN_ERR
"port %d high speed\n", index
+ 1);
1858 static int isp1760_hub_control(struct usb_hcd
*hcd
, u16 typeReq
,
1859 u16 wValue
, u16 wIndex
, char *buf
, u16 wLength
)
1861 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
1862 int ports
= HCS_N_PORTS(priv
->hcs_params
);
1863 u32 __iomem
*status_reg
= hcd
->regs
+ HC_PORTSC1
;
1865 unsigned long flags
;
1870 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
1871 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
1872 * (track current state ourselves) ... blink for diagnostics,
1873 * power, "this is the one", etc. EHCI spec supports this.
1876 spin_lock_irqsave(&priv
->lock
, flags
);
1878 case ClearHubFeature
:
1880 case C_HUB_LOCAL_POWER
:
1881 case C_HUB_OVER_CURRENT
:
1882 /* no hub-wide feature/status flags */
1888 case ClearPortFeature
:
1889 if (!wIndex
|| wIndex
> ports
)
1892 temp
= isp1760_readl(status_reg
);
1895 * Even if OWNER is set, so the port is owned by the
1896 * companion controller, khubd needs to be able to clear
1897 * the port-change status bits (especially
1898 * USB_PORT_FEAT_C_CONNECTION).
1902 case USB_PORT_FEAT_ENABLE
:
1903 isp1760_writel(temp
& ~PORT_PE
, status_reg
);
1905 case USB_PORT_FEAT_C_ENABLE
:
1908 case USB_PORT_FEAT_SUSPEND
:
1909 if (temp
& PORT_RESET
)
1912 if (temp
& PORT_SUSPEND
) {
1913 if ((temp
& PORT_PE
) == 0)
1915 /* resume signaling for 20 msec */
1916 temp
&= ~(PORT_RWC_BITS
);
1917 isp1760_writel(temp
| PORT_RESUME
,
1919 priv
->reset_done
= jiffies
+
1920 msecs_to_jiffies(20);
1923 case USB_PORT_FEAT_C_SUSPEND
:
1924 /* we auto-clear this feature */
1926 case USB_PORT_FEAT_POWER
:
1927 if (HCS_PPC(priv
->hcs_params
))
1928 isp1760_writel(temp
& ~PORT_POWER
, status_reg
);
1930 case USB_PORT_FEAT_C_CONNECTION
:
1931 isp1760_writel(temp
| PORT_CSC
,
1934 case USB_PORT_FEAT_C_OVER_CURRENT
:
1937 case USB_PORT_FEAT_C_RESET
:
1938 /* GetPortStatus clears reset */
1943 isp1760_readl(hcd
->regs
+ HC_USBCMD
);
1945 case GetHubDescriptor
:
1946 isp1760_hub_descriptor(priv
, (struct usb_hub_descriptor
*)
1950 /* no hub-wide feature/status flags */
1954 if (!wIndex
|| wIndex
> ports
)
1958 temp
= isp1760_readl(status_reg
);
1960 /* wPortChange bits */
1961 if (temp
& PORT_CSC
)
1962 status
|= 1 << USB_PORT_FEAT_C_CONNECTION
;
1965 /* whoever resumes must GetPortStatus to complete it!! */
1966 if (temp
& PORT_RESUME
) {
1967 printk(KERN_ERR
"Port resume should be skipped.\n");
1969 /* Remote Wakeup received? */
1970 if (!priv
->reset_done
) {
1971 /* resume signaling for 20 msec */
1972 priv
->reset_done
= jiffies
1973 + msecs_to_jiffies(20);
1974 /* check the port again */
1975 mod_timer(&priv_to_hcd(priv
)->rh_timer
,
1979 /* resume completed? */
1980 else if (time_after_eq(jiffies
,
1981 priv
->reset_done
)) {
1982 status
|= 1 << USB_PORT_FEAT_C_SUSPEND
;
1983 priv
->reset_done
= 0;
1985 /* stop resume signaling */
1986 temp
= isp1760_readl(status_reg
);
1988 temp
& ~(PORT_RWC_BITS
| PORT_RESUME
),
1990 retval
= handshake(priv
, status_reg
,
1991 PORT_RESUME
, 0, 2000 /* 2msec */);
1994 "port %d resume error %d\n",
1995 wIndex
+ 1, retval
);
1998 temp
&= ~(PORT_SUSPEND
|PORT_RESUME
|(3<<10));
2002 /* whoever resets must GetPortStatus to complete it!! */
2003 if ((temp
& PORT_RESET
)
2004 && time_after_eq(jiffies
,
2005 priv
->reset_done
)) {
2006 status
|= 1 << USB_PORT_FEAT_C_RESET
;
2007 priv
->reset_done
= 0;
2009 /* force reset to complete */
2010 isp1760_writel(temp
& ~PORT_RESET
,
2012 /* REVISIT: some hardware needs 550+ usec to clear
2013 * this bit; seems too long to spin routinely...
2015 retval
= handshake(priv
, status_reg
,
2016 PORT_RESET
, 0, 750);
2018 isp1760_err(priv
, "port %d reset error %d\n",
2019 wIndex
+ 1, retval
);
2023 /* see what we found out */
2024 temp
= check_reset_complete(priv
, wIndex
, status_reg
,
2025 isp1760_readl(status_reg
));
2028 * Even if OWNER is set, there's no harm letting khubd
2029 * see the wPortStatus values (they should all be 0 except
2030 * for PORT_POWER anyway).
2033 if (temp
& PORT_OWNER
)
2034 printk(KERN_ERR
"Warning: PORT_OWNER is set\n");
2036 if (temp
& PORT_CONNECT
) {
2037 status
|= 1 << USB_PORT_FEAT_CONNECTION
;
2038 /* status may be from integrated TT */
2039 status
|= ehci_port_speed(priv
, temp
);
2042 status
|= 1 << USB_PORT_FEAT_ENABLE
;
2043 if (temp
& (PORT_SUSPEND
|PORT_RESUME
))
2044 status
|= 1 << USB_PORT_FEAT_SUSPEND
;
2045 if (temp
& PORT_RESET
)
2046 status
|= 1 << USB_PORT_FEAT_RESET
;
2047 if (temp
& PORT_POWER
)
2048 status
|= 1 << USB_PORT_FEAT_POWER
;
2050 put_unaligned(cpu_to_le32(status
), (__le32
*) buf
);
2054 case C_HUB_LOCAL_POWER
:
2055 case C_HUB_OVER_CURRENT
:
2056 /* no hub-wide feature/status flags */
2062 case SetPortFeature
:
2063 selector
= wIndex
>> 8;
2065 if (!wIndex
|| wIndex
> ports
)
2068 temp
= isp1760_readl(status_reg
);
2069 if (temp
& PORT_OWNER
)
2072 /* temp &= ~PORT_RWC_BITS; */
2074 case USB_PORT_FEAT_ENABLE
:
2075 isp1760_writel(temp
| PORT_PE
, status_reg
);
2078 case USB_PORT_FEAT_SUSPEND
:
2079 if ((temp
& PORT_PE
) == 0
2080 || (temp
& PORT_RESET
) != 0)
2083 isp1760_writel(temp
| PORT_SUSPEND
, status_reg
);
2085 case USB_PORT_FEAT_POWER
:
2086 if (HCS_PPC(priv
->hcs_params
))
2087 isp1760_writel(temp
| PORT_POWER
,
2090 case USB_PORT_FEAT_RESET
:
2091 if (temp
& PORT_RESUME
)
2093 /* line status bits may report this as low speed,
2094 * which can be fine if this root hub has a
2095 * transaction translator built in.
2097 if ((temp
& (PORT_PE
|PORT_CONNECT
)) == PORT_CONNECT
2098 && PORT_USB11(temp
)) {
2105 * caller must wait, then call GetPortStatus
2106 * usb 2.0 spec says 50 ms resets on root
2108 priv
->reset_done
= jiffies
+
2109 msecs_to_jiffies(50);
2111 isp1760_writel(temp
, status_reg
);
2116 isp1760_readl(hcd
->regs
+ HC_USBCMD
);
2121 /* "stall" on error */
2124 spin_unlock_irqrestore(&priv
->lock
, flags
);
2128 static void isp1760_endpoint_disable(struct usb_hcd
*usb_hcd
,
2129 struct usb_host_endpoint
*ep
)
2131 struct isp1760_hcd
*priv
= hcd_to_priv(usb_hcd
);
2132 struct isp1760_qh
*qh
;
2133 struct isp1760_qtd
*qtd
;
2134 unsigned long flags
;
2136 spin_lock_irqsave(&priv
->lock
, flags
);
2143 /* more than entry might get removed */
2144 if (list_empty(&qh
->qtd_list
))
2147 qtd
= list_first_entry(&qh
->qtd_list
, struct isp1760_qtd
,
2150 if (qtd
->status
& URB_ENQUEUED
) {
2152 spin_unlock_irqrestore(&priv
->lock
, flags
);
2153 isp1760_urb_dequeue(usb_hcd
, qtd
->urb
, -ECONNRESET
);
2154 spin_lock_irqsave(&priv
->lock
, flags
);
2159 clean_up_qtdlist(qtd
);
2160 isp1760_urb_done(priv
, urb
, -ECONNRESET
);
2165 /* remove requests and leak them.
2166 * ATL are pretty fast done, INT could take a while...
2167 * The latter shoule be removed
2170 spin_unlock_irqrestore(&priv
->lock
, flags
);
2173 static int isp1760_get_frame(struct usb_hcd
*hcd
)
2175 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
2178 fr
= isp1760_readl(hcd
->regs
+ HC_FRINDEX
);
2179 return (fr
>> 3) % priv
->periodic_size
;
2182 static void isp1760_stop(struct usb_hcd
*hcd
)
2184 struct isp1760_hcd
*priv
= hcd_to_priv(hcd
);
2187 isp1760_hub_control(hcd
, ClearPortFeature
, USB_PORT_FEAT_POWER
, 1,
2191 spin_lock_irq(&priv
->lock
);
2194 temp
= isp1760_readl(hcd
->regs
+ HC_HW_MODE_CTRL
);
2195 isp1760_writel(temp
&= ~HW_GLOBAL_INTR_EN
, hcd
->regs
+ HC_HW_MODE_CTRL
);
2196 spin_unlock_irq(&priv
->lock
);
2198 isp1760_writel(0, hcd
->regs
+ HC_CONFIGFLAG
);
2201 static void isp1760_shutdown(struct usb_hcd
*hcd
)
2206 temp
= isp1760_readl(hcd
->regs
+ HC_HW_MODE_CTRL
);
2207 isp1760_writel(temp
&= ~HW_GLOBAL_INTR_EN
, hcd
->regs
+ HC_HW_MODE_CTRL
);
2209 command
= isp1760_readl(hcd
->regs
+ HC_USBCMD
);
2210 command
&= ~CMD_RUN
;
2211 isp1760_writel(command
, hcd
->regs
+ HC_USBCMD
);
2214 static const struct hc_driver isp1760_hc_driver
= {
2215 .description
= "isp1760-hcd",
2216 .product_desc
= "NXP ISP1760 USB Host Controller",
2217 .hcd_priv_size
= sizeof(struct isp1760_hcd
),
2219 .flags
= HCD_MEMORY
| HCD_USB2
,
2220 .reset
= isp1760_hc_setup
,
2221 .start
= isp1760_run
,
2222 .stop
= isp1760_stop
,
2223 .shutdown
= isp1760_shutdown
,
2224 .urb_enqueue
= isp1760_urb_enqueue
,
2225 .urb_dequeue
= isp1760_urb_dequeue
,
2226 .endpoint_disable
= isp1760_endpoint_disable
,
2227 .get_frame_number
= isp1760_get_frame
,
2228 .hub_status_data
= isp1760_hub_status_data
,
2229 .hub_control
= isp1760_hub_control
,
2232 int __init
init_kmem_once(void)
2234 qtd_cachep
= kmem_cache_create("isp1760_qtd",
2235 sizeof(struct isp1760_qtd
), 0, SLAB_TEMPORARY
|
2236 SLAB_MEM_SPREAD
, NULL
);
2241 qh_cachep
= kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh
),
2242 0, SLAB_TEMPORARY
| SLAB_MEM_SPREAD
, NULL
);
2245 kmem_cache_destroy(qtd_cachep
);
2252 void deinit_kmem_cache(void)
2254 kmem_cache_destroy(qtd_cachep
);
2255 kmem_cache_destroy(qh_cachep
);
2258 struct usb_hcd
*isp1760_register(u64 res_start
, u64 res_len
, int irq
,
2259 u64 irqflags
, struct device
*dev
, const char *busname
,
2260 unsigned int devflags
)
2262 struct usb_hcd
*hcd
;
2263 struct isp1760_hcd
*priv
;
2267 return ERR_PTR(-ENODEV
);
2269 /* prevent usb-core allocating DMA pages */
2270 dev
->dma_mask
= NULL
;
2272 hcd
= usb_create_hcd(&isp1760_hc_driver
, dev
, dev_name(dev
));
2274 return ERR_PTR(-ENOMEM
);
2276 priv
= hcd_to_priv(hcd
);
2277 priv
->devflags
= devflags
;
2279 hcd
->regs
= ioremap(res_start
, res_len
);
2286 hcd
->rsrc_start
= res_start
;
2287 hcd
->rsrc_len
= res_len
;
2289 ret
= usb_add_hcd(hcd
, irq
, irqflags
);
2301 return ERR_PTR(ret
);
2304 MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP");
2305 MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>");
2306 MODULE_LICENSE("GPL v2");