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_bus *bus_if = dev_get_drvdata(dev_id);
46 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
48 brcmf_dbg(INTR, "oob intr triggered\n");
51 * out-of-band interrupt is level-triggered which won't
52 * be cleared until dpc
54 if (sdiodev->irq_en) {
55 disable_irq_nosync(irq);
56 sdiodev->irq_en = false;
59 brcmf_sdbrcm_isr(sdiodev->bus);
64 int brcmf_sdio_intr_register(struct brcmf_sdio_dev *sdiodev)
70 brcmf_dbg(TRACE, "Entering\n");
72 brcmf_dbg(ERROR, "requesting irq %d\n", sdiodev->irq);
73 ret = request_irq(sdiodev->irq, brcmf_sdio_irqhandler,
74 sdiodev->irq_flags, "brcmf_oob_intr",
75 &sdiodev->func[1]->dev);
78 spin_lock_init(&sdiodev->irq_en_lock);
79 spin_lock_irqsave(&sdiodev->irq_en_lock, flags);
80 sdiodev->irq_en = true;
81 spin_unlock_irqrestore(&sdiodev->irq_en_lock, flags);
83 ret = enable_irq_wake(sdiodev->irq);
86 sdiodev->irq_wake = true;
88 sdio_claim_host(sdiodev->func[1]);
90 /* must configure SDIO_CCCR_IENx to enable irq */
91 data = brcmf_sdio_regrb(sdiodev, SDIO_CCCR_IENx, &ret);
92 data |= 1 << SDIO_FUNC_1 | 1 << SDIO_FUNC_2 | 1;
93 brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, data, &ret);
95 /* redirect, configure and enable io for interrupt signal */
96 data = SDIO_SEPINT_MASK | SDIO_SEPINT_OE;
97 if (sdiodev->irq_flags & IRQF_TRIGGER_HIGH)
98 data |= SDIO_SEPINT_ACT_HI;
99 brcmf_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, data, &ret);
101 sdio_release_host(sdiodev->func[1]);
106 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev *sdiodev)
108 brcmf_dbg(TRACE, "Entering\n");
110 sdio_claim_host(sdiodev->func[1]);
111 brcmf_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL);
112 brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, 0, NULL);
113 sdio_release_host(sdiodev->func[1]);
115 if (sdiodev->irq_wake) {
116 disable_irq_wake(sdiodev->irq);
117 sdiodev->irq_wake = false;
119 free_irq(sdiodev->irq, &sdiodev->func[1]->dev);
120 sdiodev->irq_en = false;
124 #else /* CONFIG_BRCMFMAC_SDIO_OOB */
125 static void brcmf_sdio_irqhandler(struct sdio_func *func)
127 struct brcmf_bus *bus_if = dev_get_drvdata(&func->dev);
128 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
130 brcmf_dbg(INTR, "ib intr triggered\n");
132 brcmf_sdbrcm_isr(sdiodev->bus);
135 /* dummy handler for SDIO function 2 interrupt */
136 static void brcmf_sdio_dummy_irqhandler(struct sdio_func *func)
140 int brcmf_sdio_intr_register(struct brcmf_sdio_dev *sdiodev)
142 brcmf_dbg(TRACE, "Entering\n");
144 sdio_claim_host(sdiodev->func[1]);
145 sdio_claim_irq(sdiodev->func[1], brcmf_sdio_irqhandler);
146 sdio_claim_irq(sdiodev->func[2], brcmf_sdio_dummy_irqhandler);
147 sdio_release_host(sdiodev->func[1]);
152 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev *sdiodev)
154 brcmf_dbg(TRACE, "Entering\n");
156 sdio_claim_host(sdiodev->func[1]);
157 sdio_release_irq(sdiodev->func[2]);
158 sdio_release_irq(sdiodev->func[1]);
159 sdio_release_host(sdiodev->func[1]);
163 #endif /* CONFIG_BRCMFMAC_SDIO_OOB */
166 brcmf_sdcard_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
172 addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
173 addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
174 addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
176 for (i = 0; i < 3; i++) {
180 usleep_range(1000, 2000);
181 err = brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE,
182 SDIO_FUNC_1, SBSDIO_FUNC1_SBADDRLOW + i,
184 } while (err != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
187 brcmf_dbg(ERROR, "failed at addr:0x%0x\n",
188 SBSDIO_FUNC1_SBADDRLOW + i);
197 brcmf_sdio_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
198 void *data, bool write)
200 u8 func_num, reg_size;
206 * figure out how to read the register based on address range
207 * 0x00 ~ 0x7FF: function 0 CCCR and FBR
208 * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
209 * The rest: function 1 silicon backplane core registers
211 if ((addr & ~REG_F0_REG_MASK) == 0) {
212 func_num = SDIO_FUNC_0;
214 } else if ((addr & ~REG_F1_MISC_MASK) == 0) {
215 func_num = SDIO_FUNC_1;
218 func_num = SDIO_FUNC_1;
221 /* Set the window for SB core register */
222 bar = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
223 if (bar != sdiodev->sbwad) {
224 ret = brcmf_sdcard_set_sbaddr_window(sdiodev, bar);
226 memset(data, 0xFF, reg_size);
229 sdiodev->sbwad = bar;
231 addr &= SBSDIO_SB_OFT_ADDR_MASK;
232 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
237 memset(data, 0, reg_size);
238 if (retry) /* wait for 1 ms till bus get settled down */
239 usleep_range(1000, 2000);
241 ret = brcmf_sdioh_request_byte(sdiodev, write,
242 func_num, addr, data);
244 ret = brcmf_sdioh_request_word(sdiodev, write,
245 func_num, addr, data, 4);
246 } while (ret != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
249 brcmf_dbg(ERROR, "failed with %d\n", ret);
254 u8 brcmf_sdio_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
259 brcmf_dbg(INFO, "addr:0x%08x\n", addr);
260 retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
261 brcmf_dbg(INFO, "data:0x%02x\n", data);
269 u32 brcmf_sdio_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
274 brcmf_dbg(INFO, "addr:0x%08x\n", addr);
275 retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
276 brcmf_dbg(INFO, "data:0x%08x\n", data);
284 void brcmf_sdio_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
289 brcmf_dbg(INFO, "addr:0x%08x, data:0x%02x\n", addr, data);
290 retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
296 void brcmf_sdio_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
301 brcmf_dbg(INFO, "addr:0x%08x, data:0x%08x\n", addr, data);
302 retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
308 static int brcmf_sdcard_recv_prepare(struct brcmf_sdio_dev *sdiodev, uint fn,
309 uint flags, uint width, u32 *addr)
311 uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
314 /* Async not implemented yet */
315 if (flags & SDIO_REQ_ASYNC)
318 if (bar0 != sdiodev->sbwad) {
319 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
323 sdiodev->sbwad = bar0;
326 *addr &= SBSDIO_SB_OFT_ADDR_MASK;
329 *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
335 brcmf_sdcard_recv_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
336 uint flags, u8 *buf, uint nbytes)
338 struct sk_buff *mypkt;
341 mypkt = brcmu_pkt_buf_get_skb(nbytes);
343 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
348 err = brcmf_sdcard_recv_pkt(sdiodev, addr, fn, flags, mypkt);
350 memcpy(buf, mypkt->data, nbytes);
352 brcmu_pkt_buf_free_skb(mypkt);
357 brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
358 uint flags, struct sk_buff *pkt)
364 brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
367 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
368 err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
372 incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
373 err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_READ,
380 int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
381 uint flags, struct sk_buff_head *pktq)
387 brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
388 fn, addr, pktq->qlen);
390 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
391 err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
395 incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
396 err = brcmf_sdioh_request_chain(sdiodev, incr_fix, SDIOH_READ, fn, addr,
404 brcmf_sdcard_send_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
405 uint flags, u8 *buf, uint nbytes)
407 struct sk_buff *mypkt;
410 mypkt = brcmu_pkt_buf_get_skb(nbytes);
412 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
417 memcpy(mypkt->data, buf, nbytes);
418 err = brcmf_sdcard_send_pkt(sdiodev, addr, fn, flags, mypkt);
420 brcmu_pkt_buf_free_skb(mypkt);
426 brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
427 uint flags, struct sk_buff *pkt)
431 uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
434 brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
437 /* Async not implemented yet */
438 if (flags & SDIO_REQ_ASYNC)
441 if (bar0 != sdiodev->sbwad) {
442 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
446 sdiodev->sbwad = bar0;
449 addr &= SBSDIO_SB_OFT_ADDR_MASK;
451 incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
452 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
454 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
456 err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_WRITE, fn,
463 int brcmf_sdcard_rwdata(struct brcmf_sdio_dev *sdiodev, uint rw, u32 addr,
464 u8 *buf, uint nbytes)
466 struct sk_buff *mypkt;
467 bool write = rw ? SDIOH_WRITE : SDIOH_READ;
470 addr &= SBSDIO_SB_OFT_ADDR_MASK;
471 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
473 mypkt = brcmu_pkt_buf_get_skb(nbytes);
475 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
480 /* For a write, copy the buffer data into the packet. */
482 memcpy(mypkt->data, buf, nbytes);
484 err = brcmf_sdioh_request_buffer(sdiodev, SDIOH_DATA_INC, write,
485 SDIO_FUNC_1, addr, mypkt);
487 /* For a read, copy the packet data back to the buffer. */
489 memcpy(buf, mypkt->data, nbytes);
491 brcmu_pkt_buf_free_skb(mypkt);
495 int brcmf_sdcard_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
497 char t_func = (char)fn;
498 brcmf_dbg(TRACE, "Enter\n");
500 /* issue abort cmd52 command through F0 */
501 brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE, SDIO_FUNC_0,
502 SDIO_CCCR_ABORT, &t_func);
504 brcmf_dbg(TRACE, "Exit\n");
508 int brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
513 ret = brcmf_sdioh_attach(sdiodev);
519 /* Report the BAR, to fix if needed */
520 sdiodev->sbwad = SI_ENUM_BASE;
522 /* try to attach to the target device */
523 sdiodev->bus = brcmf_sdbrcm_probe(regs, sdiodev);
525 brcmf_dbg(ERROR, "device attach failed\n");
532 brcmf_sdio_remove(sdiodev);
536 EXPORT_SYMBOL(brcmf_sdio_probe);
538 int brcmf_sdio_remove(struct brcmf_sdio_dev *sdiodev)
540 sdiodev->bus_if->state = BRCMF_BUS_DOWN;
543 brcmf_sdbrcm_disconnect(sdiodev->bus);
547 brcmf_sdioh_detach(sdiodev);
553 EXPORT_SYMBOL(brcmf_sdio_remove);
555 void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev *sdiodev, bool enable)
558 brcmf_sdbrcm_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
560 brcmf_sdbrcm_wd_timer(sdiodev->bus, 0);