2 * Copyright (c) 2010 Broadcom Corporation
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 /* ****************** SDIO CARD Interface Functions **************************/
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20 #include <linux/types.h>
21 #include <linux/netdevice.h>
22 #include <linux/export.h>
23 #include <linux/pci.h>
24 #include <linux/pci_ids.h>
25 #include <linux/sched.h>
26 #include <linux/completion.h>
27 #include <linux/mmc/sdio.h>
28 #include <linux/mmc/sdio_func.h>
29 #include <linux/mmc/card.h>
32 #include <brcm_hw_ids.h>
33 #include <brcmu_utils.h>
34 #include <brcmu_wifi.h>
38 #include "sdio_host.h"
40 #define SDIOH_API_ACCESS_RETRY_LIMIT 2
42 #ifdef CONFIG_BRCMFMAC_SDIO_OOB
43 static irqreturn_t
brcmf_sdio_irqhandler(int irq
, void *dev_id
)
45 struct brcmf_sdio_dev
*sdiodev
= dev_get_drvdata(dev_id
);
47 brcmf_dbg(INTR
, "oob intr triggered\n");
50 * out-of-band interrupt is level-triggered which won't
51 * be cleared until dpc
53 if (sdiodev
->irq_en
) {
54 disable_irq_nosync(irq
);
55 sdiodev
->irq_en
= false;
58 brcmf_sdbrcm_isr(sdiodev
->bus
);
63 int brcmf_sdio_intr_register(struct brcmf_sdio_dev
*sdiodev
)
69 brcmf_dbg(TRACE
, "Entering\n");
71 brcmf_dbg(ERROR
, "requesting irq %d\n", sdiodev
->irq
);
72 ret
= request_irq(sdiodev
->irq
, brcmf_sdio_irqhandler
,
73 sdiodev
->irq_flags
, "brcmf_oob_intr",
74 &sdiodev
->func
[1]->card
->dev
);
77 spin_lock_init(&sdiodev
->irq_en_lock
);
78 spin_lock_irqsave(&sdiodev
->irq_en_lock
, flags
);
79 sdiodev
->irq_en
= true;
80 spin_unlock_irqrestore(&sdiodev
->irq_en_lock
, flags
);
82 ret
= enable_irq_wake(sdiodev
->irq
);
85 sdiodev
->irq_wake
= true;
87 /* must configure SDIO_CCCR_IENx to enable irq */
88 data
= brcmf_sdcard_cfg_read(sdiodev
, SDIO_FUNC_0
,
89 SDIO_CCCR_IENx
, &ret
);
90 data
|= 1 << SDIO_FUNC_1
| 1 << SDIO_FUNC_2
| 1;
91 brcmf_sdcard_cfg_write(sdiodev
, SDIO_FUNC_0
, SDIO_CCCR_IENx
,
94 /* redirect, configure ane enable io for interrupt signal */
95 data
= SDIO_SEPINT_MASK
| SDIO_SEPINT_OE
;
96 if (sdiodev
->irq_flags
| IRQF_TRIGGER_HIGH
)
97 data
|= SDIO_SEPINT_ACT_HI
;
98 brcmf_sdcard_cfg_write(sdiodev
, SDIO_FUNC_0
, SDIO_CCCR_BRCM_SEPINT
,
104 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev
*sdiodev
)
106 brcmf_dbg(TRACE
, "Entering\n");
108 brcmf_sdcard_cfg_write(sdiodev
, SDIO_FUNC_0
, SDIO_CCCR_BRCM_SEPINT
,
110 brcmf_sdcard_cfg_write(sdiodev
, SDIO_FUNC_0
, SDIO_CCCR_IENx
, 0, NULL
);
112 if (sdiodev
->irq_wake
) {
113 disable_irq_wake(sdiodev
->irq
);
114 sdiodev
->irq_wake
= false;
116 free_irq(sdiodev
->irq
, &sdiodev
->func
[1]->card
->dev
);
117 sdiodev
->irq_en
= false;
121 #else /* CONFIG_BRCMFMAC_SDIO_OOB */
122 static void brcmf_sdio_irqhandler(struct sdio_func
*func
)
124 struct brcmf_sdio_dev
*sdiodev
= dev_get_drvdata(&func
->card
->dev
);
126 brcmf_dbg(INTR
, "ib intr triggered\n");
128 brcmf_sdbrcm_isr(sdiodev
->bus
);
131 /* dummy handler for SDIO function 2 interrupt */
132 static void brcmf_sdio_dummy_irqhandler(struct sdio_func
*func
)
136 int brcmf_sdio_intr_register(struct brcmf_sdio_dev
*sdiodev
)
138 brcmf_dbg(TRACE
, "Entering\n");
140 sdio_claim_host(sdiodev
->func
[1]);
141 sdio_claim_irq(sdiodev
->func
[1], brcmf_sdio_irqhandler
);
142 sdio_claim_irq(sdiodev
->func
[2], brcmf_sdio_dummy_irqhandler
);
143 sdio_release_host(sdiodev
->func
[1]);
148 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev
*sdiodev
)
150 brcmf_dbg(TRACE
, "Entering\n");
152 sdio_claim_host(sdiodev
->func
[1]);
153 sdio_release_irq(sdiodev
->func
[2]);
154 sdio_release_irq(sdiodev
->func
[1]);
155 sdio_release_host(sdiodev
->func
[1]);
159 #endif /* CONFIG_BRCMFMAC_SDIO_OOB */
161 u8
brcmf_sdcard_cfg_read(struct brcmf_sdio_dev
*sdiodev
, uint fnc_num
, u32 addr
,
169 if (retry
) /* wait for 1 ms till bus get settled down */
171 status
= brcmf_sdioh_request_byte(sdiodev
, SDIOH_READ
, fnc_num
,
174 && (retry
++ < SDIOH_API_ACCESS_RETRY_LIMIT
));
178 brcmf_dbg(INFO
, "fun = %d, addr = 0x%x, u8data = 0x%x\n",
179 fnc_num
, addr
, data
);
185 brcmf_sdcard_cfg_write(struct brcmf_sdio_dev
*sdiodev
, uint fnc_num
, u32 addr
,
192 if (retry
) /* wait for 1 ms till bus get settled down */
194 status
= brcmf_sdioh_request_byte(sdiodev
, SDIOH_WRITE
, fnc_num
,
197 && (retry
++ < SDIOH_API_ACCESS_RETRY_LIMIT
));
201 brcmf_dbg(INFO
, "fun = %d, addr = 0x%x, u8data = 0x%x\n",
202 fnc_num
, addr
, data
);
206 brcmf_sdcard_set_sbaddr_window(struct brcmf_sdio_dev
*sdiodev
, u32 address
)
212 addr
[0] = (address
>> 8) & SBSDIO_SBADDRLOW_MASK
;
213 addr
[1] = (address
>> 16) & SBSDIO_SBADDRMID_MASK
;
214 addr
[2] = (address
>> 24) & SBSDIO_SBADDRHIGH_MASK
;
216 for (i
= 0; i
< 3; i
++) {
220 usleep_range(1000, 2000);
221 err
= brcmf_sdioh_request_byte(sdiodev
, SDIOH_WRITE
,
222 SDIO_FUNC_1
, SBSDIO_FUNC1_SBADDRLOW
+ i
,
224 } while (err
!= 0 && retry
++ < SDIOH_API_ACCESS_RETRY_LIMIT
);
227 brcmf_dbg(ERROR
, "failed at addr:0x%0x\n",
228 SBSDIO_FUNC1_SBADDRLOW
+ i
);
237 brcmf_sdio_regrw_helper(struct brcmf_sdio_dev
*sdiodev
, u32 addr
,
238 void *data
, bool write
)
240 u8 func_num
, reg_size
;
246 * figure out how to read the register based on address range
247 * 0x00 ~ 0xFF: function 0 CCCR
248 * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
249 * The rest: function 1 silicon backplane core registers
251 if ((addr
& ~REG_F0_CCCR_MASK
) == 0) {
252 func_num
= SDIO_FUNC_0
;
254 } else if ((addr
& ~REG_F1_MISC_MASK
) == 0) {
255 func_num
= SDIO_FUNC_1
;
258 func_num
= SDIO_FUNC_1
;
261 /* Set the window for SB core register */
262 bar
= addr
& ~SBSDIO_SB_OFT_ADDR_MASK
;
263 if (bar
!= sdiodev
->sbwad
) {
264 ret
= brcmf_sdcard_set_sbaddr_window(sdiodev
, bar
);
266 memset(data
, 0xFF, reg_size
);
269 sdiodev
->sbwad
= bar
;
271 addr
&= SBSDIO_SB_OFT_ADDR_MASK
;
272 addr
|= SBSDIO_SB_ACCESS_2_4B_FLAG
;
277 memset(data
, 0, reg_size
);
278 if (retry
) /* wait for 1 ms till bus get settled down */
279 usleep_range(1000, 2000);
281 ret
= brcmf_sdioh_request_byte(sdiodev
, write
,
282 func_num
, addr
, data
);
284 ret
= brcmf_sdioh_request_word(sdiodev
, write
,
285 func_num
, addr
, data
, 4);
286 } while (ret
!= 0 && retry
++ < SDIOH_API_ACCESS_RETRY_LIMIT
);
288 sdiodev
->regfail
= (ret
!= 0);
289 if (sdiodev
->regfail
)
290 brcmf_dbg(ERROR
, "failed with %d\n", ret
);
295 u8
brcmf_sdio_regrb(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, int *ret
)
300 brcmf_dbg(INFO
, "addr:0x%08x\n", addr
);
301 retval
= brcmf_sdio_regrw_helper(sdiodev
, addr
, &data
, false);
302 brcmf_dbg(INFO
, "data:0x%02x\n", data
);
310 u32
brcmf_sdio_regrl(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, int *ret
)
315 brcmf_dbg(INFO
, "addr:0x%08x\n", addr
);
316 retval
= brcmf_sdio_regrw_helper(sdiodev
, addr
, &data
, false);
317 brcmf_dbg(INFO
, "data:0x%08x\n", data
);
325 void brcmf_sdio_regwb(struct brcmf_sdio_dev
*sdiodev
, u32 addr
,
330 brcmf_dbg(INFO
, "addr:0x%08x, data:0x%02x\n", addr
, data
);
331 retval
= brcmf_sdio_regrw_helper(sdiodev
, addr
, &data
, true);
337 void brcmf_sdio_regwl(struct brcmf_sdio_dev
*sdiodev
, u32 addr
,
342 brcmf_dbg(INFO
, "addr:0x%08x, data:0x%08x\n", addr
, data
);
343 retval
= brcmf_sdio_regrw_helper(sdiodev
, addr
, &data
, true);
349 u32
brcmf_sdcard_reg_read(struct brcmf_sdio_dev
*sdiodev
, u32 addr
)
353 uint bar0
= addr
& ~SBSDIO_SB_OFT_ADDR_MASK
;
355 brcmf_dbg(INFO
, "fun = 1, addr = 0x%x\n", addr
);
357 if (bar0
!= sdiodev
->sbwad
) {
358 if (brcmf_sdcard_set_sbaddr_window(sdiodev
, bar0
))
361 sdiodev
->sbwad
= bar0
;
364 addr
&= SBSDIO_SB_OFT_ADDR_MASK
;
365 addr
|= SBSDIO_SB_ACCESS_2_4B_FLAG
;
367 status
= brcmf_sdioh_request_word(sdiodev
, SDIOH_READ
, SDIO_FUNC_1
,
370 sdiodev
->regfail
= (status
!= 0);
373 brcmf_dbg(INFO
, "data = 0x%x\n", word
);
376 brcmf_dbg(ERROR
, "failed %d at addr 0x%04x\n", status
, addr
);
381 u32
brcmf_sdcard_reg_write(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, u32 data
)
384 uint bar0
= addr
& ~SBSDIO_SB_OFT_ADDR_MASK
;
387 brcmf_dbg(INFO
, "fun = 1, addr = 0x%x, uint32data = 0x%x\n",
390 if (bar0
!= sdiodev
->sbwad
) {
391 err
= brcmf_sdcard_set_sbaddr_window(sdiodev
, bar0
);
395 sdiodev
->sbwad
= bar0
;
398 addr
&= SBSDIO_SB_OFT_ADDR_MASK
;
399 addr
|= SBSDIO_SB_ACCESS_2_4B_FLAG
;
401 brcmf_sdioh_request_word(sdiodev
, SDIOH_WRITE
, SDIO_FUNC_1
,
403 sdiodev
->regfail
= (status
!= 0);
408 brcmf_dbg(ERROR
, "error writing 0x%08x to addr 0x%04x\n",
413 bool brcmf_sdcard_regfail(struct brcmf_sdio_dev
*sdiodev
)
415 return sdiodev
->regfail
;
418 static int brcmf_sdcard_recv_prepare(struct brcmf_sdio_dev
*sdiodev
, uint fn
,
419 uint flags
, uint width
, u32
*addr
)
421 uint bar0
= *addr
& ~SBSDIO_SB_OFT_ADDR_MASK
;
424 /* Async not implemented yet */
425 if (flags
& SDIO_REQ_ASYNC
)
428 if (bar0
!= sdiodev
->sbwad
) {
429 err
= brcmf_sdcard_set_sbaddr_window(sdiodev
, bar0
);
433 sdiodev
->sbwad
= bar0
;
436 *addr
&= SBSDIO_SB_OFT_ADDR_MASK
;
439 *addr
|= SBSDIO_SB_ACCESS_2_4B_FLAG
;
445 brcmf_sdcard_recv_buf(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, uint fn
,
446 uint flags
, u8
*buf
, uint nbytes
)
448 struct sk_buff
*mypkt
;
451 mypkt
= brcmu_pkt_buf_get_skb(nbytes
);
453 brcmf_dbg(ERROR
, "brcmu_pkt_buf_get_skb failed: len %d\n",
458 err
= brcmf_sdcard_recv_pkt(sdiodev
, addr
, fn
, flags
, mypkt
);
460 memcpy(buf
, mypkt
->data
, nbytes
);
462 brcmu_pkt_buf_free_skb(mypkt
);
467 brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, uint fn
,
468 uint flags
, struct sk_buff
*pkt
)
474 brcmf_dbg(INFO
, "fun = %d, addr = 0x%x, size = %d\n",
477 width
= (flags
& SDIO_REQ_4BYTE
) ? 4 : 2;
478 err
= brcmf_sdcard_recv_prepare(sdiodev
, fn
, flags
, width
, &addr
);
482 incr_fix
= (flags
& SDIO_REQ_FIXED
) ? SDIOH_DATA_FIX
: SDIOH_DATA_INC
;
483 err
= brcmf_sdioh_request_buffer(sdiodev
, incr_fix
, SDIOH_READ
,
489 int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, uint fn
,
490 uint flags
, struct sk_buff_head
*pktq
)
496 brcmf_dbg(INFO
, "fun = %d, addr = 0x%x, size = %d\n",
497 fn
, addr
, pktq
->qlen
);
499 width
= (flags
& SDIO_REQ_4BYTE
) ? 4 : 2;
500 err
= brcmf_sdcard_recv_prepare(sdiodev
, fn
, flags
, width
, &addr
);
504 incr_fix
= (flags
& SDIO_REQ_FIXED
) ? SDIOH_DATA_FIX
: SDIOH_DATA_INC
;
505 err
= brcmf_sdioh_request_chain(sdiodev
, incr_fix
, SDIOH_READ
, fn
, addr
,
512 brcmf_sdcard_send_buf(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, uint fn
,
513 uint flags
, u8
*buf
, uint nbytes
)
515 struct sk_buff
*mypkt
;
518 mypkt
= brcmu_pkt_buf_get_skb(nbytes
);
520 brcmf_dbg(ERROR
, "brcmu_pkt_buf_get_skb failed: len %d\n",
525 memcpy(mypkt
->data
, buf
, nbytes
);
526 err
= brcmf_sdcard_send_pkt(sdiodev
, addr
, fn
, flags
, mypkt
);
528 brcmu_pkt_buf_free_skb(mypkt
);
534 brcmf_sdcard_send_pkt(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, uint fn
,
535 uint flags
, struct sk_buff
*pkt
)
539 uint bar0
= addr
& ~SBSDIO_SB_OFT_ADDR_MASK
;
542 brcmf_dbg(INFO
, "fun = %d, addr = 0x%x, size = %d\n",
545 /* Async not implemented yet */
546 if (flags
& SDIO_REQ_ASYNC
)
549 if (bar0
!= sdiodev
->sbwad
) {
550 err
= brcmf_sdcard_set_sbaddr_window(sdiodev
, bar0
);
554 sdiodev
->sbwad
= bar0
;
557 addr
&= SBSDIO_SB_OFT_ADDR_MASK
;
559 incr_fix
= (flags
& SDIO_REQ_FIXED
) ? SDIOH_DATA_FIX
: SDIOH_DATA_INC
;
560 width
= (flags
& SDIO_REQ_4BYTE
) ? 4 : 2;
562 addr
|= SBSDIO_SB_ACCESS_2_4B_FLAG
;
564 return brcmf_sdioh_request_buffer(sdiodev
, incr_fix
, SDIOH_WRITE
, fn
,
568 int brcmf_sdcard_rwdata(struct brcmf_sdio_dev
*sdiodev
, uint rw
, u32 addr
,
569 u8
*buf
, uint nbytes
)
571 struct sk_buff
*mypkt
;
572 bool write
= rw
? SDIOH_WRITE
: SDIOH_READ
;
575 addr
&= SBSDIO_SB_OFT_ADDR_MASK
;
576 addr
|= SBSDIO_SB_ACCESS_2_4B_FLAG
;
578 mypkt
= brcmu_pkt_buf_get_skb(nbytes
);
580 brcmf_dbg(ERROR
, "brcmu_pkt_buf_get_skb failed: len %d\n",
585 /* For a write, copy the buffer data into the packet. */
587 memcpy(mypkt
->data
, buf
, nbytes
);
589 err
= brcmf_sdioh_request_buffer(sdiodev
, SDIOH_DATA_INC
, write
,
590 SDIO_FUNC_1
, addr
, mypkt
);
592 /* For a read, copy the packet data back to the buffer. */
594 memcpy(buf
, mypkt
->data
, nbytes
);
596 brcmu_pkt_buf_free_skb(mypkt
);
600 int brcmf_sdcard_abort(struct brcmf_sdio_dev
*sdiodev
, uint fn
)
602 char t_func
= (char)fn
;
603 brcmf_dbg(TRACE
, "Enter\n");
605 /* issue abort cmd52 command through F0 */
606 brcmf_sdioh_request_byte(sdiodev
, SDIOH_WRITE
, SDIO_FUNC_0
,
607 SDIO_CCCR_ABORT
, &t_func
);
609 brcmf_dbg(TRACE
, "Exit\n");
613 int brcmf_sdio_probe(struct brcmf_sdio_dev
*sdiodev
)
618 ret
= brcmf_sdioh_attach(sdiodev
);
624 /* Report the BAR, to fix if needed */
625 sdiodev
->sbwad
= SI_ENUM_BASE
;
627 /* try to attach to the target device */
628 sdiodev
->bus
= brcmf_sdbrcm_probe(regs
, sdiodev
);
630 brcmf_dbg(ERROR
, "device attach failed\n");
637 brcmf_sdio_remove(sdiodev
);
641 EXPORT_SYMBOL(brcmf_sdio_probe
);
643 int brcmf_sdio_remove(struct brcmf_sdio_dev
*sdiodev
)
646 brcmf_sdbrcm_disconnect(sdiodev
->bus
);
650 brcmf_sdioh_detach(sdiodev
);
656 EXPORT_SYMBOL(brcmf_sdio_remove
);
658 void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev
*sdiodev
, bool enable
)
661 brcmf_sdbrcm_wd_timer(sdiodev
->bus
, BRCMF_WD_POLL_MS
);
663 brcmf_sdbrcm_wd_timer(sdiodev
->bus
, 0);