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_sdio_regrb(sdiodev
, SDIO_CCCR_IENx
, &ret
);
89 data
|= 1 << SDIO_FUNC_1
| 1 << SDIO_FUNC_2
| 1;
90 brcmf_sdio_regwb(sdiodev
, SDIO_CCCR_IENx
, data
, &ret
);
92 /* redirect, configure and enable io for interrupt signal */
93 data
= SDIO_SEPINT_MASK
| SDIO_SEPINT_OE
;
94 if (sdiodev
->irq_flags
& IRQF_TRIGGER_HIGH
)
95 data
|= SDIO_SEPINT_ACT_HI
;
96 brcmf_sdio_regwb(sdiodev
, SDIO_CCCR_BRCM_SEPINT
, data
, &ret
);
101 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev
*sdiodev
)
103 brcmf_dbg(TRACE
, "Entering\n");
105 brcmf_sdio_regwb(sdiodev
, SDIO_CCCR_BRCM_SEPINT
, 0, NULL
);
106 brcmf_sdio_regwb(sdiodev
, SDIO_CCCR_IENx
, 0, NULL
);
108 if (sdiodev
->irq_wake
) {
109 disable_irq_wake(sdiodev
->irq
);
110 sdiodev
->irq_wake
= false;
112 free_irq(sdiodev
->irq
, &sdiodev
->func
[1]->card
->dev
);
113 sdiodev
->irq_en
= false;
117 #else /* CONFIG_BRCMFMAC_SDIO_OOB */
118 static void brcmf_sdio_irqhandler(struct sdio_func
*func
)
120 struct brcmf_sdio_dev
*sdiodev
= dev_get_drvdata(&func
->card
->dev
);
122 brcmf_dbg(INTR
, "ib intr triggered\n");
124 brcmf_sdbrcm_isr(sdiodev
->bus
);
127 /* dummy handler for SDIO function 2 interrupt */
128 static void brcmf_sdio_dummy_irqhandler(struct sdio_func
*func
)
132 int brcmf_sdio_intr_register(struct brcmf_sdio_dev
*sdiodev
)
134 brcmf_dbg(TRACE
, "Entering\n");
136 sdio_claim_host(sdiodev
->func
[1]);
137 sdio_claim_irq(sdiodev
->func
[1], brcmf_sdio_irqhandler
);
138 sdio_claim_irq(sdiodev
->func
[2], brcmf_sdio_dummy_irqhandler
);
139 sdio_release_host(sdiodev
->func
[1]);
144 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev
*sdiodev
)
146 brcmf_dbg(TRACE
, "Entering\n");
148 sdio_claim_host(sdiodev
->func
[1]);
149 sdio_release_irq(sdiodev
->func
[2]);
150 sdio_release_irq(sdiodev
->func
[1]);
151 sdio_release_host(sdiodev
->func
[1]);
155 #endif /* CONFIG_BRCMFMAC_SDIO_OOB */
158 brcmf_sdcard_set_sbaddr_window(struct brcmf_sdio_dev
*sdiodev
, u32 address
)
164 addr
[0] = (address
>> 8) & SBSDIO_SBADDRLOW_MASK
;
165 addr
[1] = (address
>> 16) & SBSDIO_SBADDRMID_MASK
;
166 addr
[2] = (address
>> 24) & SBSDIO_SBADDRHIGH_MASK
;
168 for (i
= 0; i
< 3; i
++) {
172 usleep_range(1000, 2000);
173 err
= brcmf_sdioh_request_byte(sdiodev
, SDIOH_WRITE
,
174 SDIO_FUNC_1
, SBSDIO_FUNC1_SBADDRLOW
+ i
,
176 } while (err
!= 0 && retry
++ < SDIOH_API_ACCESS_RETRY_LIMIT
);
179 brcmf_dbg(ERROR
, "failed at addr:0x%0x\n",
180 SBSDIO_FUNC1_SBADDRLOW
+ i
);
189 brcmf_sdio_regrw_helper(struct brcmf_sdio_dev
*sdiodev
, u32 addr
,
190 void *data
, bool write
)
192 u8 func_num
, reg_size
;
198 * figure out how to read the register based on address range
199 * 0x00 ~ 0x7FF: function 0 CCCR and FBR
200 * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
201 * The rest: function 1 silicon backplane core registers
203 if ((addr
& ~REG_F0_REG_MASK
) == 0) {
204 func_num
= SDIO_FUNC_0
;
206 } else if ((addr
& ~REG_F1_MISC_MASK
) == 0) {
207 func_num
= SDIO_FUNC_1
;
210 func_num
= SDIO_FUNC_1
;
213 /* Set the window for SB core register */
214 bar
= addr
& ~SBSDIO_SB_OFT_ADDR_MASK
;
215 if (bar
!= sdiodev
->sbwad
) {
216 ret
= brcmf_sdcard_set_sbaddr_window(sdiodev
, bar
);
218 memset(data
, 0xFF, reg_size
);
221 sdiodev
->sbwad
= bar
;
223 addr
&= SBSDIO_SB_OFT_ADDR_MASK
;
224 addr
|= SBSDIO_SB_ACCESS_2_4B_FLAG
;
229 memset(data
, 0, reg_size
);
230 if (retry
) /* wait for 1 ms till bus get settled down */
231 usleep_range(1000, 2000);
233 ret
= brcmf_sdioh_request_byte(sdiodev
, write
,
234 func_num
, addr
, data
);
236 ret
= brcmf_sdioh_request_word(sdiodev
, write
,
237 func_num
, addr
, data
, 4);
238 } while (ret
!= 0 && retry
++ < SDIOH_API_ACCESS_RETRY_LIMIT
);
241 brcmf_dbg(ERROR
, "failed with %d\n", ret
);
246 u8
brcmf_sdio_regrb(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, int *ret
)
251 brcmf_dbg(INFO
, "addr:0x%08x\n", addr
);
252 retval
= brcmf_sdio_regrw_helper(sdiodev
, addr
, &data
, false);
253 brcmf_dbg(INFO
, "data:0x%02x\n", data
);
261 u32
brcmf_sdio_regrl(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, int *ret
)
266 brcmf_dbg(INFO
, "addr:0x%08x\n", addr
);
267 retval
= brcmf_sdio_regrw_helper(sdiodev
, addr
, &data
, false);
268 brcmf_dbg(INFO
, "data:0x%08x\n", data
);
276 void brcmf_sdio_regwb(struct brcmf_sdio_dev
*sdiodev
, u32 addr
,
281 brcmf_dbg(INFO
, "addr:0x%08x, data:0x%02x\n", addr
, data
);
282 retval
= brcmf_sdio_regrw_helper(sdiodev
, addr
, &data
, true);
288 void brcmf_sdio_regwl(struct brcmf_sdio_dev
*sdiodev
, u32 addr
,
293 brcmf_dbg(INFO
, "addr:0x%08x, data:0x%08x\n", addr
, data
);
294 retval
= brcmf_sdio_regrw_helper(sdiodev
, addr
, &data
, true);
300 static int brcmf_sdcard_recv_prepare(struct brcmf_sdio_dev
*sdiodev
, uint fn
,
301 uint flags
, uint width
, u32
*addr
)
303 uint bar0
= *addr
& ~SBSDIO_SB_OFT_ADDR_MASK
;
306 /* Async not implemented yet */
307 if (flags
& SDIO_REQ_ASYNC
)
310 if (bar0
!= sdiodev
->sbwad
) {
311 err
= brcmf_sdcard_set_sbaddr_window(sdiodev
, bar0
);
315 sdiodev
->sbwad
= bar0
;
318 *addr
&= SBSDIO_SB_OFT_ADDR_MASK
;
321 *addr
|= SBSDIO_SB_ACCESS_2_4B_FLAG
;
327 brcmf_sdcard_recv_buf(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, uint fn
,
328 uint flags
, u8
*buf
, uint nbytes
)
330 struct sk_buff
*mypkt
;
333 mypkt
= brcmu_pkt_buf_get_skb(nbytes
);
335 brcmf_dbg(ERROR
, "brcmu_pkt_buf_get_skb failed: len %d\n",
340 err
= brcmf_sdcard_recv_pkt(sdiodev
, addr
, fn
, flags
, mypkt
);
342 memcpy(buf
, mypkt
->data
, nbytes
);
344 brcmu_pkt_buf_free_skb(mypkt
);
349 brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, uint fn
,
350 uint flags
, struct sk_buff
*pkt
)
356 brcmf_dbg(INFO
, "fun = %d, addr = 0x%x, size = %d\n",
359 width
= (flags
& SDIO_REQ_4BYTE
) ? 4 : 2;
360 err
= brcmf_sdcard_recv_prepare(sdiodev
, fn
, flags
, width
, &addr
);
364 incr_fix
= (flags
& SDIO_REQ_FIXED
) ? SDIOH_DATA_FIX
: SDIOH_DATA_INC
;
365 err
= brcmf_sdioh_request_buffer(sdiodev
, incr_fix
, SDIOH_READ
,
371 int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, uint fn
,
372 uint flags
, struct sk_buff_head
*pktq
)
378 brcmf_dbg(INFO
, "fun = %d, addr = 0x%x, size = %d\n",
379 fn
, addr
, pktq
->qlen
);
381 width
= (flags
& SDIO_REQ_4BYTE
) ? 4 : 2;
382 err
= brcmf_sdcard_recv_prepare(sdiodev
, fn
, flags
, width
, &addr
);
386 incr_fix
= (flags
& SDIO_REQ_FIXED
) ? SDIOH_DATA_FIX
: SDIOH_DATA_INC
;
387 err
= brcmf_sdioh_request_chain(sdiodev
, incr_fix
, SDIOH_READ
, fn
, addr
,
394 brcmf_sdcard_send_buf(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, uint fn
,
395 uint flags
, u8
*buf
, uint nbytes
)
397 struct sk_buff
*mypkt
;
400 mypkt
= brcmu_pkt_buf_get_skb(nbytes
);
402 brcmf_dbg(ERROR
, "brcmu_pkt_buf_get_skb failed: len %d\n",
407 memcpy(mypkt
->data
, buf
, nbytes
);
408 err
= brcmf_sdcard_send_pkt(sdiodev
, addr
, fn
, flags
, mypkt
);
410 brcmu_pkt_buf_free_skb(mypkt
);
416 brcmf_sdcard_send_pkt(struct brcmf_sdio_dev
*sdiodev
, u32 addr
, uint fn
,
417 uint flags
, struct sk_buff
*pkt
)
421 uint bar0
= addr
& ~SBSDIO_SB_OFT_ADDR_MASK
;
424 brcmf_dbg(INFO
, "fun = %d, addr = 0x%x, size = %d\n",
427 /* Async not implemented yet */
428 if (flags
& SDIO_REQ_ASYNC
)
431 if (bar0
!= sdiodev
->sbwad
) {
432 err
= brcmf_sdcard_set_sbaddr_window(sdiodev
, bar0
);
436 sdiodev
->sbwad
= bar0
;
439 addr
&= SBSDIO_SB_OFT_ADDR_MASK
;
441 incr_fix
= (flags
& SDIO_REQ_FIXED
) ? SDIOH_DATA_FIX
: SDIOH_DATA_INC
;
442 width
= (flags
& SDIO_REQ_4BYTE
) ? 4 : 2;
444 addr
|= SBSDIO_SB_ACCESS_2_4B_FLAG
;
446 return brcmf_sdioh_request_buffer(sdiodev
, incr_fix
, SDIOH_WRITE
, fn
,
450 int brcmf_sdcard_rwdata(struct brcmf_sdio_dev
*sdiodev
, uint rw
, u32 addr
,
451 u8
*buf
, uint nbytes
)
453 struct sk_buff
*mypkt
;
454 bool write
= rw
? SDIOH_WRITE
: SDIOH_READ
;
457 addr
&= SBSDIO_SB_OFT_ADDR_MASK
;
458 addr
|= SBSDIO_SB_ACCESS_2_4B_FLAG
;
460 mypkt
= brcmu_pkt_buf_get_skb(nbytes
);
462 brcmf_dbg(ERROR
, "brcmu_pkt_buf_get_skb failed: len %d\n",
467 /* For a write, copy the buffer data into the packet. */
469 memcpy(mypkt
->data
, buf
, nbytes
);
471 err
= brcmf_sdioh_request_buffer(sdiodev
, SDIOH_DATA_INC
, write
,
472 SDIO_FUNC_1
, addr
, mypkt
);
474 /* For a read, copy the packet data back to the buffer. */
476 memcpy(buf
, mypkt
->data
, nbytes
);
478 brcmu_pkt_buf_free_skb(mypkt
);
482 int brcmf_sdcard_abort(struct brcmf_sdio_dev
*sdiodev
, uint fn
)
484 char t_func
= (char)fn
;
485 brcmf_dbg(TRACE
, "Enter\n");
487 /* issue abort cmd52 command through F0 */
488 brcmf_sdioh_request_byte(sdiodev
, SDIOH_WRITE
, SDIO_FUNC_0
,
489 SDIO_CCCR_ABORT
, &t_func
);
491 brcmf_dbg(TRACE
, "Exit\n");
495 int brcmf_sdio_probe(struct brcmf_sdio_dev
*sdiodev
)
500 ret
= brcmf_sdioh_attach(sdiodev
);
506 /* Report the BAR, to fix if needed */
507 sdiodev
->sbwad
= SI_ENUM_BASE
;
509 /* try to attach to the target device */
510 sdiodev
->bus
= brcmf_sdbrcm_probe(regs
, sdiodev
);
512 brcmf_dbg(ERROR
, "device attach failed\n");
519 brcmf_sdio_remove(sdiodev
);
523 EXPORT_SYMBOL(brcmf_sdio_probe
);
525 int brcmf_sdio_remove(struct brcmf_sdio_dev
*sdiodev
)
528 brcmf_sdbrcm_disconnect(sdiodev
->bus
);
532 brcmf_sdioh_detach(sdiodev
);
538 EXPORT_SYMBOL(brcmf_sdio_remove
);
540 void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev
*sdiodev
, bool enable
)
543 brcmf_sdbrcm_wd_timer(sdiodev
->bus
, BRCMF_WD_POLL_MS
);
545 brcmf_sdbrcm_wd_timer(sdiodev
->bus
, 0);