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 #include <linux/types.h>
19 #include <linux/netdevice.h>
20 #include <linux/pci.h>
21 #include <linux/pci_ids.h>
22 #include <linux/sched.h>
23 #include <linux/completion.h>
24 #include <linux/interrupt.h>
25 #include <linux/scatterlist.h>
26 #include <linux/mmc/sdio.h>
27 #include <linux/mmc/core.h>
28 #include <linux/mmc/sdio_func.h>
29 #include <linux/mmc/card.h>
30 #include <linux/mmc/host.h>
31 #include <linux/pm_runtime.h>
32 #include <linux/suspend.h>
33 #include <linux/errno.h>
34 #include <linux/module.h>
35 #include <linux/acpi.h>
36 #include <net/cfg80211.h>
39 #include <brcm_hw_ids.h>
40 #include <brcmu_utils.h>
41 #include <brcmu_wifi.h>
42 #include <chipcommon.h>
51 #define SDIOH_API_ACCESS_RETRY_LIMIT 2
53 #define DMA_ALIGN_MASK 0x03
55 #define SDIO_FUNC1_BLOCKSIZE 64
56 #define SDIO_FUNC2_BLOCKSIZE 512
57 /* Maximum milliseconds to wait for F2 to come up */
58 #define SDIO_WAIT_F2RDY 3000
60 #define BRCMF_DEFAULT_RXGLOM_SIZE 32 /* max rx frames in glom chain */
62 struct brcmf_sdiod_freezer {
64 atomic_t thread_count;
66 wait_queue_head_t thread_freeze;
67 struct completion resumed;
70 static irqreturn_t brcmf_sdiod_oob_irqhandler(int irq, void *dev_id)
72 struct brcmf_bus *bus_if = dev_get_drvdata(dev_id);
73 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
75 brcmf_dbg(INTR, "OOB intr triggered\n");
77 /* out-of-band interrupt is level-triggered which won't
78 * be cleared until dpc
80 if (sdiodev->irq_en) {
81 disable_irq_nosync(irq);
82 sdiodev->irq_en = false;
85 brcmf_sdio_isr(sdiodev->bus);
90 static void brcmf_sdiod_ib_irqhandler(struct sdio_func *func)
92 struct brcmf_bus *bus_if = dev_get_drvdata(&func->dev);
93 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
95 brcmf_dbg(INTR, "IB intr triggered\n");
97 brcmf_sdio_isr(sdiodev->bus);
100 /* dummy handler for SDIO function 2 interrupt */
101 static void brcmf_sdiod_dummy_irqhandler(struct sdio_func *func)
105 int brcmf_sdiod_intr_register(struct brcmf_sdio_dev *sdiodev)
107 struct brcmfmac_sdio_pd *pdata;
110 u32 addr, gpiocontrol;
112 pdata = &sdiodev->settings->bus.sdio;
113 if (pdata->oob_irq_supported) {
114 brcmf_dbg(SDIO, "Enter, register OOB IRQ %d\n",
116 spin_lock_init(&sdiodev->irq_en_lock);
117 sdiodev->irq_en = true;
119 ret = request_irq(pdata->oob_irq_nr, brcmf_sdiod_oob_irqhandler,
120 pdata->oob_irq_flags, "brcmf_oob_intr",
121 &sdiodev->func[1]->dev);
123 brcmf_err("request_irq failed %d\n", ret);
126 sdiodev->oob_irq_requested = true;
128 ret = enable_irq_wake(pdata->oob_irq_nr);
130 brcmf_err("enable_irq_wake failed %d\n", ret);
133 sdiodev->irq_wake = true;
135 sdio_claim_host(sdiodev->func[1]);
137 if (sdiodev->bus_if->chip == BRCM_CC_43362_CHIP_ID) {
138 /* assign GPIO to SDIO core */
139 addr = CORE_CC_REG(SI_ENUM_BASE, gpiocontrol);
140 gpiocontrol = brcmf_sdiod_regrl(sdiodev, addr, &ret);
142 brcmf_sdiod_regwl(sdiodev, addr, gpiocontrol, &ret);
144 brcmf_sdiod_regwb(sdiodev, SBSDIO_GPIO_SELECT, 0xf,
146 brcmf_sdiod_regwb(sdiodev, SBSDIO_GPIO_OUT, 0, &ret);
147 brcmf_sdiod_regwb(sdiodev, SBSDIO_GPIO_EN, 0x2, &ret);
150 /* must configure SDIO_CCCR_IENx to enable irq */
151 data = brcmf_sdiod_regrb(sdiodev, SDIO_CCCR_IENx, &ret);
152 data |= 1 << SDIO_FUNC_1 | 1 << SDIO_FUNC_2 | 1;
153 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_IENx, data, &ret);
155 /* redirect, configure and enable io for interrupt signal */
156 data = SDIO_SEPINT_MASK | SDIO_SEPINT_OE;
157 if (pdata->oob_irq_flags & IRQF_TRIGGER_HIGH)
158 data |= SDIO_SEPINT_ACT_HI;
159 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, data, &ret);
161 sdio_release_host(sdiodev->func[1]);
163 brcmf_dbg(SDIO, "Entering\n");
164 sdio_claim_host(sdiodev->func[1]);
165 sdio_claim_irq(sdiodev->func[1], brcmf_sdiod_ib_irqhandler);
166 sdio_claim_irq(sdiodev->func[2], brcmf_sdiod_dummy_irqhandler);
167 sdio_release_host(sdiodev->func[1]);
168 sdiodev->sd_irq_requested = true;
174 void brcmf_sdiod_intr_unregister(struct brcmf_sdio_dev *sdiodev)
177 brcmf_dbg(SDIO, "Entering oob=%d sd=%d\n",
178 sdiodev->oob_irq_requested,
179 sdiodev->sd_irq_requested);
181 if (sdiodev->oob_irq_requested) {
182 struct brcmfmac_sdio_pd *pdata;
184 pdata = &sdiodev->settings->bus.sdio;
185 sdio_claim_host(sdiodev->func[1]);
186 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL);
187 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_IENx, 0, NULL);
188 sdio_release_host(sdiodev->func[1]);
190 sdiodev->oob_irq_requested = false;
191 if (sdiodev->irq_wake) {
192 disable_irq_wake(pdata->oob_irq_nr);
193 sdiodev->irq_wake = false;
195 free_irq(pdata->oob_irq_nr, &sdiodev->func[1]->dev);
196 sdiodev->irq_en = false;
197 sdiodev->oob_irq_requested = false;
200 if (sdiodev->sd_irq_requested) {
201 sdio_claim_host(sdiodev->func[1]);
202 sdio_release_irq(sdiodev->func[2]);
203 sdio_release_irq(sdiodev->func[1]);
204 sdio_release_host(sdiodev->func[1]);
205 sdiodev->sd_irq_requested = false;
209 void brcmf_sdiod_change_state(struct brcmf_sdio_dev *sdiodev,
210 enum brcmf_sdiod_state state)
212 if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM ||
213 state == sdiodev->state)
216 brcmf_dbg(TRACE, "%d -> %d\n", sdiodev->state, state);
217 switch (sdiodev->state) {
218 case BRCMF_SDIOD_DATA:
219 /* any other state means bus interface is down */
220 brcmf_bus_change_state(sdiodev->bus_if, BRCMF_BUS_DOWN);
222 case BRCMF_SDIOD_DOWN:
223 /* transition from DOWN to DATA means bus interface is up */
224 if (state == BRCMF_SDIOD_DATA)
225 brcmf_bus_change_state(sdiodev->bus_if, BRCMF_BUS_UP);
230 sdiodev->state = state;
233 static inline int brcmf_sdiod_f0_writeb(struct sdio_func *func,
234 uint regaddr, u8 byte)
239 * Can only directly write to some F0 registers.
240 * Handle CCCR_IENx and CCCR_ABORT command
243 if ((regaddr == SDIO_CCCR_ABORT) ||
244 (regaddr == SDIO_CCCR_IENx))
245 sdio_writeb(func, byte, regaddr, &err_ret);
247 sdio_f0_writeb(func, byte, regaddr, &err_ret);
252 static int brcmf_sdiod_request_data(struct brcmf_sdio_dev *sdiodev, u8 fn,
253 u32 addr, u8 regsz, void *data, bool write)
255 struct sdio_func *func;
258 brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
259 write, fn, addr, regsz);
261 /* only allow byte access on F0 */
262 if (WARN_ON(regsz > 1 && !fn))
264 func = sdiodev->func[fn];
270 sdio_writeb(func, *(u8 *)data, addr, &ret);
272 ret = brcmf_sdiod_f0_writeb(func, addr,
276 *(u8 *)data = sdio_readb(func, addr, &ret);
278 *(u8 *)data = sdio_f0_readb(func, addr, &ret);
283 sdio_writew(func, *(u16 *)data, addr, &ret);
285 *(u16 *)data = sdio_readw(func, addr, &ret);
289 sdio_writel(func, *(u32 *)data, addr, &ret);
291 *(u32 *)data = sdio_readl(func, addr, &ret);
294 brcmf_err("invalid size: %d\n", regsz);
299 brcmf_dbg(SDIO, "failed to %s data F%d@0x%05x, err: %d\n",
300 write ? "write" : "read", fn, addr, ret);
305 static int brcmf_sdiod_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
306 u8 regsz, void *data, bool write)
312 if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM)
316 * figure out how to read the register based on address range
317 * 0x00 ~ 0x7FF: function 0 CCCR and FBR
318 * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
319 * The rest: function 1 silicon backplane core registers
321 if ((addr & ~REG_F0_REG_MASK) == 0)
328 memset(data, 0, regsz);
329 /* for retry wait for 1 ms till bus get settled down */
331 usleep_range(1000, 2000);
332 ret = brcmf_sdiod_request_data(sdiodev, func, addr, regsz,
334 } while (ret != 0 && ret != -ENOMEDIUM &&
335 retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
337 if (ret == -ENOMEDIUM)
338 brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);
341 * SleepCSR register access can fail when
342 * waking up the device so reduce this noise
345 if (addr != SBSDIO_FUNC1_SLEEPCSR)
346 brcmf_err("failed to %s data F%d@0x%05x, err: %d\n",
347 write ? "write" : "read", func, addr, ret);
349 brcmf_dbg(SDIO, "failed to %s data F%d@0x%05x, err: %d\n",
350 write ? "write" : "read", func, addr, ret);
356 brcmf_sdiod_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
361 if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM)
364 addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
365 addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
366 addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
368 for (i = 0; i < 3; i++) {
369 err = brcmf_sdiod_regrw_helper(sdiodev,
370 SBSDIO_FUNC1_SBADDRLOW + i,
371 sizeof(u8), &addr[i], true);
373 brcmf_err("failed at addr: 0x%0x\n",
374 SBSDIO_FUNC1_SBADDRLOW + i);
383 brcmf_sdiod_addrprep(struct brcmf_sdio_dev *sdiodev, uint width, u32 *addr)
385 uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
388 if (bar0 != sdiodev->sbwad) {
389 err = brcmf_sdiod_set_sbaddr_window(sdiodev, bar0);
393 sdiodev->sbwad = bar0;
396 *addr &= SBSDIO_SB_OFT_ADDR_MASK;
399 *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
404 u8 brcmf_sdiod_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
409 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
410 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
412 brcmf_dbg(SDIO, "data:0x%02x\n", data);
420 u32 brcmf_sdiod_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
425 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
426 retval = brcmf_sdiod_addrprep(sdiodev, sizeof(data), &addr);
429 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
431 brcmf_dbg(SDIO, "data:0x%08x\n", data);
440 void brcmf_sdiod_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
445 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%02x\n", addr, data);
446 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
452 void brcmf_sdiod_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
457 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%08x\n", addr, data);
458 retval = brcmf_sdiod_addrprep(sdiodev, sizeof(data), &addr);
461 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
469 static int brcmf_sdiod_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn,
470 bool write, u32 addr, struct sk_buff *pkt)
475 /* Single skb use the standard mmc interface */
476 req_sz = pkt->len + 3;
480 err = sdio_memcpy_toio(sdiodev->func[fn], addr,
481 ((u8 *)(pkt->data)), req_sz);
483 err = sdio_memcpy_fromio(sdiodev->func[fn], ((u8 *)(pkt->data)),
486 /* function 2 read is FIFO operation */
487 err = sdio_readsb(sdiodev->func[fn], ((u8 *)(pkt->data)), addr,
489 if (err == -ENOMEDIUM)
490 brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);
495 * brcmf_sdiod_sglist_rw - SDIO interface function for block data access
496 * @sdiodev: brcmfmac sdio device
497 * @fn: SDIO function number
498 * @write: direction flag
499 * @addr: dongle memory address as source/destination
502 * This function takes the respbonsibility as the interface function to MMC
503 * stack for block data access. It assumes that the skb passed down by the
504 * caller has already been padded and aligned.
506 static int brcmf_sdiod_sglist_rw(struct brcmf_sdio_dev *sdiodev, uint fn,
507 bool write, u32 addr,
508 struct sk_buff_head *pktlist)
510 unsigned int req_sz, func_blk_sz, sg_cnt, sg_data_sz, pkt_offset;
511 unsigned int max_req_sz, orig_offset, dst_offset;
512 unsigned short max_seg_cnt, seg_sz;
513 unsigned char *pkt_data, *orig_data, *dst_data;
514 struct sk_buff *pkt_next = NULL, *local_pkt_next;
515 struct sk_buff_head local_list, *target_list;
516 struct mmc_request mmc_req;
517 struct mmc_command mmc_cmd;
518 struct mmc_data mmc_dat;
519 struct scatterlist *sgl;
525 target_list = pktlist;
526 /* for host with broken sg support, prepare a page aligned list */
527 __skb_queue_head_init(&local_list);
528 if (!write && sdiodev->settings->bus.sdio.broken_sg_support) {
530 skb_queue_walk(pktlist, pkt_next)
531 req_sz += pkt_next->len;
532 req_sz = ALIGN(req_sz, sdiodev->func[fn]->cur_blksize);
533 while (req_sz > PAGE_SIZE) {
534 pkt_next = brcmu_pkt_buf_get_skb(PAGE_SIZE);
535 if (pkt_next == NULL) {
539 __skb_queue_tail(&local_list, pkt_next);
542 pkt_next = brcmu_pkt_buf_get_skb(req_sz);
543 if (pkt_next == NULL) {
547 __skb_queue_tail(&local_list, pkt_next);
548 target_list = &local_list;
551 func_blk_sz = sdiodev->func[fn]->cur_blksize;
552 max_req_sz = sdiodev->max_request_size;
553 max_seg_cnt = min_t(unsigned short, sdiodev->max_segment_count,
555 seg_sz = target_list->qlen;
557 pkt_next = target_list->next;
559 memset(&mmc_req, 0, sizeof(struct mmc_request));
560 memset(&mmc_cmd, 0, sizeof(struct mmc_command));
561 memset(&mmc_dat, 0, sizeof(struct mmc_data));
563 mmc_dat.sg = sdiodev->sgtable.sgl;
564 mmc_dat.blksz = func_blk_sz;
565 mmc_dat.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
566 mmc_cmd.opcode = SD_IO_RW_EXTENDED;
567 mmc_cmd.arg = write ? 1<<31 : 0; /* write flag */
568 mmc_cmd.arg |= (fn & 0x7) << 28; /* SDIO func num */
569 mmc_cmd.arg |= 1<<27; /* block mode */
570 /* for function 1 the addr will be incremented */
571 mmc_cmd.arg |= (fn == 1) ? 1<<26 : 0;
572 mmc_cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
573 mmc_req.cmd = &mmc_cmd;
574 mmc_req.data = &mmc_dat;
579 sgl = sdiodev->sgtable.sgl;
581 while (pkt_next != (struct sk_buff *)target_list) {
582 pkt_data = pkt_next->data + pkt_offset;
583 sg_data_sz = pkt_next->len - pkt_offset;
584 if (sg_data_sz > sdiodev->max_segment_size)
585 sg_data_sz = sdiodev->max_segment_size;
586 if (sg_data_sz > max_req_sz - req_sz)
587 sg_data_sz = max_req_sz - req_sz;
589 sg_set_buf(sgl, pkt_data, sg_data_sz);
593 req_sz += sg_data_sz;
594 pkt_offset += sg_data_sz;
595 if (pkt_offset == pkt_next->len) {
597 pkt_next = pkt_next->next;
600 if (req_sz >= max_req_sz || sg_cnt >= max_seg_cnt)
605 if (req_sz % func_blk_sz != 0) {
606 brcmf_err("sg request length %u is not %u aligned\n",
607 req_sz, func_blk_sz);
612 mmc_dat.sg_len = sg_cnt;
613 mmc_dat.blocks = req_sz / func_blk_sz;
614 mmc_cmd.arg |= (addr & 0x1FFFF) << 9; /* address */
615 mmc_cmd.arg |= mmc_dat.blocks & 0x1FF; /* block count */
616 /* incrementing addr for function 1 */
620 mmc_set_data_timeout(&mmc_dat, sdiodev->func[fn]->card);
621 mmc_wait_for_req(sdiodev->func[fn]->card->host, &mmc_req);
623 ret = mmc_cmd.error ? mmc_cmd.error : mmc_dat.error;
624 if (ret == -ENOMEDIUM) {
625 brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);
627 } else if (ret != 0) {
628 brcmf_err("CMD53 sg block %s failed %d\n",
629 write ? "write" : "read", ret);
635 if (!write && sdiodev->settings->bus.sdio.broken_sg_support) {
636 local_pkt_next = local_list.next;
638 skb_queue_walk(pktlist, pkt_next) {
641 req_sz = local_pkt_next->len - orig_offset;
642 req_sz = min_t(uint, pkt_next->len - dst_offset,
644 orig_data = local_pkt_next->data + orig_offset;
645 dst_data = pkt_next->data + dst_offset;
646 memcpy(dst_data, orig_data, req_sz);
647 orig_offset += req_sz;
648 dst_offset += req_sz;
649 if (orig_offset == local_pkt_next->len) {
651 local_pkt_next = local_pkt_next->next;
653 if (dst_offset == pkt_next->len)
655 } while (!skb_queue_empty(&local_list));
660 sg_init_table(sdiodev->sgtable.sgl, sdiodev->sgtable.orig_nents);
661 while ((pkt_next = __skb_dequeue(&local_list)) != NULL)
662 brcmu_pkt_buf_free_skb(pkt_next);
667 int brcmf_sdiod_recv_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
669 struct sk_buff *mypkt;
672 mypkt = brcmu_pkt_buf_get_skb(nbytes);
674 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
679 err = brcmf_sdiod_recv_pkt(sdiodev, mypkt);
681 memcpy(buf, mypkt->data, nbytes);
683 brcmu_pkt_buf_free_skb(mypkt);
687 int brcmf_sdiod_recv_pkt(struct brcmf_sdio_dev *sdiodev, struct sk_buff *pkt)
689 u32 addr = sdiodev->sbwad;
692 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n", addr, pkt->len);
694 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
698 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr, pkt);
704 int brcmf_sdiod_recv_chain(struct brcmf_sdio_dev *sdiodev,
705 struct sk_buff_head *pktq, uint totlen)
707 struct sk_buff *glom_skb = NULL;
709 u32 addr = sdiodev->sbwad;
712 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n",
715 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
720 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr,
722 else if (!sdiodev->sg_support) {
723 glom_skb = brcmu_pkt_buf_get_skb(totlen);
726 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr,
731 skb_queue_walk(pktq, skb) {
732 memcpy(skb->data, glom_skb->data, skb->len);
733 skb_pull(glom_skb, skb->len);
736 err = brcmf_sdiod_sglist_rw(sdiodev, SDIO_FUNC_2, false, addr,
740 brcmu_pkt_buf_free_skb(glom_skb);
744 int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
746 struct sk_buff *mypkt;
747 u32 addr = sdiodev->sbwad;
750 mypkt = brcmu_pkt_buf_get_skb(nbytes);
752 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
757 memcpy(mypkt->data, buf, nbytes);
759 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
762 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, true, addr,
765 brcmu_pkt_buf_free_skb(mypkt);
770 int brcmf_sdiod_send_pkt(struct brcmf_sdio_dev *sdiodev,
771 struct sk_buff_head *pktq)
774 u32 addr = sdiodev->sbwad;
777 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n", addr, pktq->qlen);
779 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
783 if (pktq->qlen == 1 || !sdiodev->sg_support)
784 skb_queue_walk(pktq, skb) {
785 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, true,
791 err = brcmf_sdiod_sglist_rw(sdiodev, SDIO_FUNC_2, true, addr,
798 brcmf_sdiod_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
806 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
807 pkt = dev_alloc_skb(dsize);
809 brcmf_err("dev_alloc_skb failed: len %d\n", dsize);
814 /* Determine initial transfer parameters */
815 sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
816 if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK)
817 dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr);
821 sdio_claim_host(sdiodev->func[1]);
823 /* Do the transfer(s) */
825 /* Set the backplane window to include the start address */
826 bcmerror = brcmf_sdiod_set_sbaddr_window(sdiodev, address);
830 brcmf_dbg(SDIO, "%s %d bytes at offset 0x%08x in window 0x%08x\n",
831 write ? "write" : "read", dsize,
832 sdaddr, address & SBSDIO_SBWINDOW_MASK);
834 sdaddr &= SBSDIO_SB_OFT_ADDR_MASK;
835 sdaddr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
839 memcpy(pkt->data, data, dsize);
840 bcmerror = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_1, write,
843 brcmf_err("membytes transfer failed\n");
847 memcpy(data, pkt->data, dsize);
850 /* Adjust for next transfer (if any) */
856 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
862 /* Return the window to backplane enumeration space for core access */
863 if (brcmf_sdiod_set_sbaddr_window(sdiodev, sdiodev->sbwad))
864 brcmf_err("FAILED to set window back to 0x%x\n",
867 sdio_release_host(sdiodev->func[1]);
872 int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
874 char t_func = (char)fn;
875 brcmf_dbg(SDIO, "Enter\n");
877 /* issue abort cmd52 command through F0 */
878 brcmf_sdiod_request_data(sdiodev, SDIO_FUNC_0, SDIO_CCCR_ABORT,
879 sizeof(t_func), &t_func, true);
881 brcmf_dbg(SDIO, "Exit\n");
885 void brcmf_sdiod_sgtable_alloc(struct brcmf_sdio_dev *sdiodev)
887 struct sdio_func *func;
888 struct mmc_host *host;
893 func = sdiodev->func[2];
894 host = func->card->host;
895 sdiodev->sg_support = host->max_segs > 1;
896 max_blocks = min_t(uint, host->max_blk_count, 511u);
897 sdiodev->max_request_size = min_t(uint, host->max_req_size,
898 max_blocks * func->cur_blksize);
899 sdiodev->max_segment_count = min_t(uint, host->max_segs,
900 SG_MAX_SINGLE_ALLOC);
901 sdiodev->max_segment_size = host->max_seg_size;
903 if (!sdiodev->sg_support)
906 nents = max_t(uint, BRCMF_DEFAULT_RXGLOM_SIZE,
907 sdiodev->settings->bus.sdio.txglomsz);
908 nents += (nents >> 4) + 1;
910 WARN_ON(nents > sdiodev->max_segment_count);
912 brcmf_dbg(TRACE, "nents=%d\n", nents);
913 err = sg_alloc_table(&sdiodev->sgtable, nents, GFP_KERNEL);
915 brcmf_err("allocation failed: disable scatter-gather");
916 sdiodev->sg_support = false;
919 sdiodev->txglomsz = sdiodev->settings->bus.sdio.txglomsz;
922 #ifdef CONFIG_PM_SLEEP
923 static int brcmf_sdiod_freezer_attach(struct brcmf_sdio_dev *sdiodev)
925 sdiodev->freezer = kzalloc(sizeof(*sdiodev->freezer), GFP_KERNEL);
926 if (!sdiodev->freezer)
928 atomic_set(&sdiodev->freezer->thread_count, 0);
929 atomic_set(&sdiodev->freezer->freezing, 0);
930 init_waitqueue_head(&sdiodev->freezer->thread_freeze);
931 init_completion(&sdiodev->freezer->resumed);
935 static void brcmf_sdiod_freezer_detach(struct brcmf_sdio_dev *sdiodev)
937 if (sdiodev->freezer) {
938 WARN_ON(atomic_read(&sdiodev->freezer->freezing));
939 kfree(sdiodev->freezer);
943 static int brcmf_sdiod_freezer_on(struct brcmf_sdio_dev *sdiodev)
945 atomic_t *expect = &sdiodev->freezer->thread_count;
948 sdiodev->freezer->frozen_count = 0;
949 reinit_completion(&sdiodev->freezer->resumed);
950 atomic_set(&sdiodev->freezer->freezing, 1);
951 brcmf_sdio_trigger_dpc(sdiodev->bus);
952 wait_event(sdiodev->freezer->thread_freeze,
953 atomic_read(expect) == sdiodev->freezer->frozen_count);
954 sdio_claim_host(sdiodev->func[1]);
955 res = brcmf_sdio_sleep(sdiodev->bus, true);
956 sdio_release_host(sdiodev->func[1]);
960 static void brcmf_sdiod_freezer_off(struct brcmf_sdio_dev *sdiodev)
962 sdio_claim_host(sdiodev->func[1]);
963 brcmf_sdio_sleep(sdiodev->bus, false);
964 sdio_release_host(sdiodev->func[1]);
965 atomic_set(&sdiodev->freezer->freezing, 0);
966 complete_all(&sdiodev->freezer->resumed);
969 bool brcmf_sdiod_freezing(struct brcmf_sdio_dev *sdiodev)
971 return atomic_read(&sdiodev->freezer->freezing);
974 void brcmf_sdiod_try_freeze(struct brcmf_sdio_dev *sdiodev)
976 if (!brcmf_sdiod_freezing(sdiodev))
978 sdiodev->freezer->frozen_count++;
979 wake_up(&sdiodev->freezer->thread_freeze);
980 wait_for_completion(&sdiodev->freezer->resumed);
983 void brcmf_sdiod_freezer_count(struct brcmf_sdio_dev *sdiodev)
985 atomic_inc(&sdiodev->freezer->thread_count);
988 void brcmf_sdiod_freezer_uncount(struct brcmf_sdio_dev *sdiodev)
990 atomic_dec(&sdiodev->freezer->thread_count);
993 static int brcmf_sdiod_freezer_attach(struct brcmf_sdio_dev *sdiodev)
998 static void brcmf_sdiod_freezer_detach(struct brcmf_sdio_dev *sdiodev)
1001 #endif /* CONFIG_PM_SLEEP */
1003 static int brcmf_sdiod_remove(struct brcmf_sdio_dev *sdiodev)
1005 sdiodev->state = BRCMF_SDIOD_DOWN;
1007 brcmf_sdio_remove(sdiodev->bus);
1008 sdiodev->bus = NULL;
1011 brcmf_sdiod_freezer_detach(sdiodev);
1013 /* Disable Function 2 */
1014 sdio_claim_host(sdiodev->func[2]);
1015 sdio_disable_func(sdiodev->func[2]);
1016 sdio_release_host(sdiodev->func[2]);
1018 /* Disable Function 1 */
1019 sdio_claim_host(sdiodev->func[1]);
1020 sdio_disable_func(sdiodev->func[1]);
1021 sdio_release_host(sdiodev->func[1]);
1023 sg_free_table(&sdiodev->sgtable);
1026 pm_runtime_allow(sdiodev->func[1]->card->host->parent);
1030 static void brcmf_sdiod_host_fixup(struct mmc_host *host)
1032 /* runtime-pm powers off the device */
1033 pm_runtime_forbid(host->parent);
1034 /* avoid removal detection upon resume */
1035 host->caps |= MMC_CAP_NONREMOVABLE;
1038 static int brcmf_sdiod_probe(struct brcmf_sdio_dev *sdiodev)
1042 sdiodev->num_funcs = 2;
1044 sdio_claim_host(sdiodev->func[1]);
1046 ret = sdio_set_block_size(sdiodev->func[1], SDIO_FUNC1_BLOCKSIZE);
1048 brcmf_err("Failed to set F1 blocksize\n");
1049 sdio_release_host(sdiodev->func[1]);
1052 ret = sdio_set_block_size(sdiodev->func[2], SDIO_FUNC2_BLOCKSIZE);
1054 brcmf_err("Failed to set F2 blocksize\n");
1055 sdio_release_host(sdiodev->func[1]);
1059 /* increase F2 timeout */
1060 sdiodev->func[2]->enable_timeout = SDIO_WAIT_F2RDY;
1062 /* Enable Function 1 */
1063 ret = sdio_enable_func(sdiodev->func[1]);
1064 sdio_release_host(sdiodev->func[1]);
1066 brcmf_err("Failed to enable F1: err=%d\n", ret);
1070 ret = brcmf_sdiod_freezer_attach(sdiodev);
1074 /* try to attach to the target device */
1075 sdiodev->bus = brcmf_sdio_probe(sdiodev);
1076 if (!sdiodev->bus) {
1080 brcmf_sdiod_host_fixup(sdiodev->func[2]->card->host);
1083 brcmf_sdiod_remove(sdiodev);
1088 #define BRCMF_SDIO_DEVICE(dev_id) \
1089 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, dev_id)}
1091 /* devices we support, null terminated */
1092 static const struct sdio_device_id brcmf_sdmmc_ids[] = {
1093 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43143),
1094 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43241),
1095 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4329),
1096 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4330),
1097 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4334),
1098 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43340),
1099 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43341),
1100 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43362),
1101 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43364),
1102 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4335_4339),
1103 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4339),
1104 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43430),
1105 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4345),
1106 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43455),
1107 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4354),
1108 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4356),
1109 BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_CYPRESS_4373),
1110 { /* end: all zeroes */ }
1112 MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids);
1115 static void brcmf_sdiod_acpi_set_power_manageable(struct device *dev,
1118 #if IS_ENABLED(CONFIG_ACPI)
1119 struct acpi_device *adev;
1121 adev = ACPI_COMPANION(dev);
1123 adev->flags.power_manageable = 0;
1127 static int brcmf_ops_sdio_probe(struct sdio_func *func,
1128 const struct sdio_device_id *id)
1131 struct brcmf_sdio_dev *sdiodev;
1132 struct brcmf_bus *bus_if;
1135 brcmf_dbg(SDIO, "Enter\n");
1136 brcmf_dbg(SDIO, "Class=%x\n", func->class);
1137 brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
1138 brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
1139 brcmf_dbg(SDIO, "Function#: %d\n", func->num);
1142 /* prohibit ACPI power management for this device */
1143 brcmf_sdiod_acpi_set_power_manageable(dev, 0);
1145 /* Consume func num 1 but dont do anything with it. */
1149 /* Ignore anything but func 2 */
1153 bus_if = kzalloc(sizeof(struct brcmf_bus), GFP_KERNEL);
1156 sdiodev = kzalloc(sizeof(struct brcmf_sdio_dev), GFP_KERNEL);
1162 /* store refs to functions used. mmc_card does
1163 * not hold the F0 function pointer.
1165 sdiodev->func[0] = kmemdup(func, sizeof(*func), GFP_KERNEL);
1166 sdiodev->func[0]->num = 0;
1167 sdiodev->func[1] = func->card->sdio_func[0];
1168 sdiodev->func[2] = func;
1170 sdiodev->bus_if = bus_if;
1171 bus_if->bus_priv.sdio = sdiodev;
1172 bus_if->proto_type = BRCMF_PROTO_BCDC;
1173 dev_set_drvdata(&func->dev, bus_if);
1174 dev_set_drvdata(&sdiodev->func[1]->dev, bus_if);
1175 sdiodev->dev = &sdiodev->func[1]->dev;
1177 brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_DOWN);
1179 brcmf_dbg(SDIO, "F2 found, calling brcmf_sdiod_probe...\n");
1180 err = brcmf_sdiod_probe(sdiodev);
1182 brcmf_err("F2 error, probe failed %d...\n", err);
1186 brcmf_dbg(SDIO, "F2 init completed...\n");
1190 dev_set_drvdata(&func->dev, NULL);
1191 dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
1192 kfree(sdiodev->func[0]);
1198 static void brcmf_ops_sdio_remove(struct sdio_func *func)
1200 struct brcmf_bus *bus_if;
1201 struct brcmf_sdio_dev *sdiodev;
1203 brcmf_dbg(SDIO, "Enter\n");
1204 brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
1205 brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
1206 brcmf_dbg(SDIO, "Function: %d\n", func->num);
1208 bus_if = dev_get_drvdata(&func->dev);
1210 sdiodev = bus_if->bus_priv.sdio;
1212 /* start by unregistering irqs */
1213 brcmf_sdiod_intr_unregister(sdiodev);
1218 /* only proceed with rest of cleanup if func 1 */
1219 brcmf_sdiod_remove(sdiodev);
1221 dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
1222 dev_set_drvdata(&sdiodev->func[2]->dev, NULL);
1225 kfree(sdiodev->func[0]);
1229 brcmf_dbg(SDIO, "Exit\n");
1232 void brcmf_sdio_wowl_config(struct device *dev, bool enabled)
1234 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1235 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1237 brcmf_dbg(SDIO, "Configuring WOWL, enabled=%d\n", enabled);
1238 sdiodev->wowl_enabled = enabled;
1241 #ifdef CONFIG_PM_SLEEP
1242 static int brcmf_ops_sdio_suspend(struct device *dev)
1244 struct sdio_func *func;
1245 struct brcmf_bus *bus_if;
1246 struct brcmf_sdio_dev *sdiodev;
1247 mmc_pm_flag_t sdio_flags;
1249 func = container_of(dev, struct sdio_func, dev);
1250 brcmf_dbg(SDIO, "Enter: F%d\n", func->num);
1251 if (func->num != SDIO_FUNC_1)
1255 bus_if = dev_get_drvdata(dev);
1256 sdiodev = bus_if->bus_priv.sdio;
1258 brcmf_sdiod_freezer_on(sdiodev);
1259 brcmf_sdio_wd_timer(sdiodev->bus, 0);
1261 sdio_flags = MMC_PM_KEEP_POWER;
1262 if (sdiodev->wowl_enabled) {
1263 if (sdiodev->settings->bus.sdio.oob_irq_supported)
1264 enable_irq_wake(sdiodev->settings->bus.sdio.oob_irq_nr);
1266 sdio_flags |= MMC_PM_WAKE_SDIO_IRQ;
1268 if (sdio_set_host_pm_flags(sdiodev->func[1], sdio_flags))
1269 brcmf_err("Failed to set pm_flags %x\n", sdio_flags);
1273 static int brcmf_ops_sdio_resume(struct device *dev)
1275 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1276 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1277 struct sdio_func *func = container_of(dev, struct sdio_func, dev);
1279 brcmf_dbg(SDIO, "Enter: F%d\n", func->num);
1280 if (func->num != SDIO_FUNC_2)
1283 brcmf_sdiod_freezer_off(sdiodev);
1287 static const struct dev_pm_ops brcmf_sdio_pm_ops = {
1288 .suspend = brcmf_ops_sdio_suspend,
1289 .resume = brcmf_ops_sdio_resume,
1291 #endif /* CONFIG_PM_SLEEP */
1293 static struct sdio_driver brcmf_sdmmc_driver = {
1294 .probe = brcmf_ops_sdio_probe,
1295 .remove = brcmf_ops_sdio_remove,
1296 .name = KBUILD_MODNAME,
1297 .id_table = brcmf_sdmmc_ids,
1299 .owner = THIS_MODULE,
1300 #ifdef CONFIG_PM_SLEEP
1301 .pm = &brcmf_sdio_pm_ops,
1302 #endif /* CONFIG_PM_SLEEP */
1306 void brcmf_sdio_register(void)
1310 ret = sdio_register_driver(&brcmf_sdmmc_driver);
1312 brcmf_err("sdio_register_driver failed: %d\n", ret);
1315 void brcmf_sdio_exit(void)
1317 brcmf_dbg(SDIO, "Enter\n");
1319 sdio_unregister_driver(&brcmf_sdmmc_driver);