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: 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]->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 sdio_claim_host(sdiodev->func[1]);
89 /* must configure SDIO_CCCR_IENx to enable irq */
90 data = brcmf_sdio_regrb(sdiodev, SDIO_CCCR_IENx, &ret);
91 data |= 1 << SDIO_FUNC_1 | 1 << SDIO_FUNC_2 | 1;
92 brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, data, &ret);
94 /* redirect, configure and 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_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, data, &ret);
100 sdio_release_host(sdiodev->func[1]);
105 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev *sdiodev)
107 brcmf_dbg(TRACE, "Entering\n");
109 sdio_claim_host(sdiodev->func[1]);
110 brcmf_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL);
111 brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, 0, NULL);
112 sdio_release_host(sdiodev->func[1]);
114 if (sdiodev->irq_wake) {
115 disable_irq_wake(sdiodev->irq);
116 sdiodev->irq_wake = false;
118 free_irq(sdiodev->irq, &sdiodev->func[1]->dev);
119 sdiodev->irq_en = false;
123 #else /* CONFIG_BRCMFMAC_SDIO_OOB */
124 static void brcmf_sdio_irqhandler(struct sdio_func *func)
126 struct brcmf_bus *bus_if = dev_get_drvdata(&func->dev);
127 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
129 brcmf_dbg(INTR, "ib intr triggered\n");
131 brcmf_sdbrcm_isr(sdiodev->bus);
134 /* dummy handler for SDIO function 2 interrupt */
135 static void brcmf_sdio_dummy_irqhandler(struct sdio_func *func)
139 int brcmf_sdio_intr_register(struct brcmf_sdio_dev *sdiodev)
141 brcmf_dbg(TRACE, "Entering\n");
143 sdio_claim_host(sdiodev->func[1]);
144 sdio_claim_irq(sdiodev->func[1], brcmf_sdio_irqhandler);
145 sdio_claim_irq(sdiodev->func[2], brcmf_sdio_dummy_irqhandler);
146 sdio_release_host(sdiodev->func[1]);
151 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev *sdiodev)
153 brcmf_dbg(TRACE, "Entering\n");
155 sdio_claim_host(sdiodev->func[1]);
156 sdio_release_irq(sdiodev->func[2]);
157 sdio_release_irq(sdiodev->func[1]);
158 sdio_release_host(sdiodev->func[1]);
162 #endif /* CONFIG_BRCMFMAC_SDIO_OOB */
165 brcmf_sdcard_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
171 addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
172 addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
173 addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
175 for (i = 0; i < 3; i++) {
179 usleep_range(1000, 2000);
180 err = brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE,
181 SDIO_FUNC_1, SBSDIO_FUNC1_SBADDRLOW + i,
183 } while (err != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
186 brcmf_err("failed at addr:0x%0x\n",
187 SBSDIO_FUNC1_SBADDRLOW + i);
196 brcmf_sdio_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
197 void *data, bool write)
199 u8 func_num, reg_size;
205 * figure out how to read the register based on address range
206 * 0x00 ~ 0x7FF: function 0 CCCR and FBR
207 * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
208 * The rest: function 1 silicon backplane core registers
210 if ((addr & ~REG_F0_REG_MASK) == 0) {
211 func_num = SDIO_FUNC_0;
213 } else if ((addr & ~REG_F1_MISC_MASK) == 0) {
214 func_num = SDIO_FUNC_1;
217 func_num = SDIO_FUNC_1;
220 /* Set the window for SB core register */
221 bar = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
222 if (bar != sdiodev->sbwad) {
223 ret = brcmf_sdcard_set_sbaddr_window(sdiodev, bar);
225 memset(data, 0xFF, reg_size);
228 sdiodev->sbwad = bar;
230 addr &= SBSDIO_SB_OFT_ADDR_MASK;
231 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
236 memset(data, 0, reg_size);
237 if (retry) /* wait for 1 ms till bus get settled down */
238 usleep_range(1000, 2000);
240 ret = brcmf_sdioh_request_byte(sdiodev, write,
241 func_num, addr, data);
243 ret = brcmf_sdioh_request_word(sdiodev, write,
244 func_num, addr, data, 4);
245 } while (ret != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
248 brcmf_err("failed with %d\n", ret);
253 u8 brcmf_sdio_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
258 brcmf_dbg(INFO, "addr:0x%08x\n", addr);
259 retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
260 brcmf_dbg(INFO, "data:0x%02x\n", data);
268 u32 brcmf_sdio_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
273 brcmf_dbg(INFO, "addr:0x%08x\n", addr);
274 retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
275 brcmf_dbg(INFO, "data:0x%08x\n", data);
283 void brcmf_sdio_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
288 brcmf_dbg(INFO, "addr:0x%08x, data:0x%02x\n", addr, data);
289 retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
295 void brcmf_sdio_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
300 brcmf_dbg(INFO, "addr:0x%08x, data:0x%08x\n", addr, data);
301 retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
307 static int brcmf_sdcard_recv_prepare(struct brcmf_sdio_dev *sdiodev, uint fn,
308 uint flags, uint width, u32 *addr)
310 uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
313 /* Async not implemented yet */
314 if (flags & SDIO_REQ_ASYNC)
317 if (bar0 != sdiodev->sbwad) {
318 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
322 sdiodev->sbwad = bar0;
325 *addr &= SBSDIO_SB_OFT_ADDR_MASK;
328 *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
334 brcmf_sdcard_recv_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
335 uint flags, u8 *buf, uint nbytes)
337 struct sk_buff *mypkt;
340 mypkt = brcmu_pkt_buf_get_skb(nbytes);
342 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
347 err = brcmf_sdcard_recv_pkt(sdiodev, addr, fn, flags, mypkt);
349 memcpy(buf, mypkt->data, nbytes);
351 brcmu_pkt_buf_free_skb(mypkt);
356 brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
357 uint flags, struct sk_buff *pkt)
363 brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
366 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
367 err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
371 incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
372 err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_READ,
379 int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
380 uint flags, struct sk_buff_head *pktq)
386 brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
387 fn, addr, pktq->qlen);
389 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
390 err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
394 incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
395 err = brcmf_sdioh_request_chain(sdiodev, incr_fix, SDIOH_READ, fn, addr,
403 brcmf_sdcard_send_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
404 uint flags, u8 *buf, uint nbytes)
406 struct sk_buff *mypkt;
409 mypkt = brcmu_pkt_buf_get_skb(nbytes);
411 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
416 memcpy(mypkt->data, buf, nbytes);
417 err = brcmf_sdcard_send_pkt(sdiodev, addr, fn, flags, mypkt);
419 brcmu_pkt_buf_free_skb(mypkt);
425 brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
426 uint flags, struct sk_buff *pkt)
430 uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
433 brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
436 /* Async not implemented yet */
437 if (flags & SDIO_REQ_ASYNC)
440 if (bar0 != sdiodev->sbwad) {
441 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
445 sdiodev->sbwad = bar0;
448 addr &= SBSDIO_SB_OFT_ADDR_MASK;
450 incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
451 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
453 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
455 err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_WRITE, fn,
462 int brcmf_sdcard_rwdata(struct brcmf_sdio_dev *sdiodev, uint rw, u32 addr,
463 u8 *buf, uint nbytes)
465 struct sk_buff *mypkt;
466 bool write = rw ? SDIOH_WRITE : SDIOH_READ;
469 addr &= SBSDIO_SB_OFT_ADDR_MASK;
470 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
472 mypkt = brcmu_pkt_buf_get_skb(nbytes);
474 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
479 /* For a write, copy the buffer data into the packet. */
481 memcpy(mypkt->data, buf, nbytes);
483 err = brcmf_sdioh_request_buffer(sdiodev, SDIOH_DATA_INC, write,
484 SDIO_FUNC_1, addr, mypkt);
486 /* For a read, copy the packet data back to the buffer. */
488 memcpy(buf, mypkt->data, nbytes);
490 brcmu_pkt_buf_free_skb(mypkt);
494 int brcmf_sdcard_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
496 char t_func = (char)fn;
497 brcmf_dbg(TRACE, "Enter\n");
499 /* issue abort cmd52 command through F0 */
500 brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE, SDIO_FUNC_0,
501 SDIO_CCCR_ABORT, &t_func);
503 brcmf_dbg(TRACE, "Exit\n");
507 int brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
512 ret = brcmf_sdioh_attach(sdiodev);
518 /* try to attach to the target device */
519 sdiodev->bus = brcmf_sdbrcm_probe(regs, sdiodev);
521 brcmf_err("device attach failed\n");
528 brcmf_sdio_remove(sdiodev);
532 EXPORT_SYMBOL(brcmf_sdio_probe);
534 int brcmf_sdio_remove(struct brcmf_sdio_dev *sdiodev)
536 sdiodev->bus_if->state = BRCMF_BUS_DOWN;
539 brcmf_sdbrcm_disconnect(sdiodev->bus);
543 brcmf_sdioh_detach(sdiodev);
549 EXPORT_SYMBOL(brcmf_sdio_remove);
551 void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev *sdiodev, bool enable)
554 brcmf_sdbrcm_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
556 brcmf_sdbrcm_wd_timer(sdiodev->bus, 0);