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 static void brcmf_sdioh_irqhandler(struct sdio_func *func)
44 struct brcmf_sdio_dev *sdiodev = dev_get_drvdata(&func->card->dev);
46 brcmf_dbg(TRACE, "***IRQHandler\n");
48 sdio_release_host(func);
50 brcmf_sdbrcm_isr(sdiodev->bus);
52 sdio_claim_host(func);
55 /* dummy handler for SDIO function 2 interrupt */
56 static void brcmf_sdioh_dummy_irq_handler(struct sdio_func *func)
60 int brcmf_sdcard_intr_reg(struct brcmf_sdio_dev *sdiodev)
62 brcmf_dbg(TRACE, "Entering\n");
64 sdio_claim_host(sdiodev->func[1]);
65 sdio_claim_irq(sdiodev->func[1], brcmf_sdioh_irqhandler);
66 sdio_claim_irq(sdiodev->func[2], brcmf_sdioh_dummy_irq_handler);
67 sdio_release_host(sdiodev->func[1]);
72 int brcmf_sdcard_intr_dereg(struct brcmf_sdio_dev *sdiodev)
74 brcmf_dbg(TRACE, "Entering\n");
76 sdio_claim_host(sdiodev->func[1]);
77 sdio_release_irq(sdiodev->func[2]);
78 sdio_release_irq(sdiodev->func[1]);
79 sdio_release_host(sdiodev->func[1]);
84 u8 brcmf_sdcard_cfg_read(struct brcmf_sdio_dev *sdiodev, uint fnc_num, u32 addr,
92 if (retry) /* wait for 1 ms till bus get settled down */
94 status = brcmf_sdioh_request_byte(sdiodev, SDIOH_READ, fnc_num,
97 && (retry++ < SDIOH_API_ACCESS_RETRY_LIMIT));
101 brcmf_dbg(INFO, "fun = %d, addr = 0x%x, u8data = 0x%x\n",
102 fnc_num, addr, data);
108 brcmf_sdcard_cfg_write(struct brcmf_sdio_dev *sdiodev, uint fnc_num, u32 addr,
115 if (retry) /* wait for 1 ms till bus get settled down */
117 status = brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE, fnc_num,
120 && (retry++ < SDIOH_API_ACCESS_RETRY_LIMIT));
124 brcmf_dbg(INFO, "fun = %d, addr = 0x%x, u8data = 0x%x\n",
125 fnc_num, addr, data);
129 brcmf_sdcard_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
132 brcmf_sdcard_cfg_write(sdiodev, SDIO_FUNC_1, SBSDIO_FUNC1_SBADDRLOW,
133 (address >> 8) & SBSDIO_SBADDRLOW_MASK, &err);
135 brcmf_sdcard_cfg_write(sdiodev, SDIO_FUNC_1,
136 SBSDIO_FUNC1_SBADDRMID,
137 (address >> 16) & SBSDIO_SBADDRMID_MASK,
140 brcmf_sdcard_cfg_write(sdiodev, SDIO_FUNC_1,
141 SBSDIO_FUNC1_SBADDRHIGH,
142 (address >> 24) & SBSDIO_SBADDRHIGH_MASK,
148 u32 brcmf_sdcard_reg_read(struct brcmf_sdio_dev *sdiodev, u32 addr, uint size)
152 uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
154 brcmf_dbg(INFO, "fun = 1, addr = 0x%x\n", addr);
156 if (bar0 != sdiodev->sbwad) {
157 if (brcmf_sdcard_set_sbaddr_window(sdiodev, bar0))
160 sdiodev->sbwad = bar0;
163 addr &= SBSDIO_SB_OFT_ADDR_MASK;
165 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
167 status = brcmf_sdioh_request_word(sdiodev, SDIOH_READ, SDIO_FUNC_1,
170 sdiodev->regfail = (status != 0);
172 brcmf_dbg(INFO, "u32data = 0x%x\n", word);
174 /* if ok, return appropriately masked word */
180 return word & 0xffff;
184 sdiodev->regfail = true;
189 /* otherwise, bad sdio access or invalid size */
190 brcmf_dbg(ERROR, "error reading addr 0x%04x size %d\n", addr, size);
194 u32 brcmf_sdcard_reg_write(struct brcmf_sdio_dev *sdiodev, u32 addr, uint size,
198 uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
201 brcmf_dbg(INFO, "fun = 1, addr = 0x%x, uint%ddata = 0x%x\n",
202 addr, size * 8, data);
204 if (bar0 != sdiodev->sbwad) {
205 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
209 sdiodev->sbwad = bar0;
212 addr &= SBSDIO_SB_OFT_ADDR_MASK;
214 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
216 brcmf_sdioh_request_word(sdiodev, SDIOH_WRITE, SDIO_FUNC_1,
218 sdiodev->regfail = (status != 0);
223 brcmf_dbg(ERROR, "error writing 0x%08x to addr 0x%04x size %d\n",
228 bool brcmf_sdcard_regfail(struct brcmf_sdio_dev *sdiodev)
230 return sdiodev->regfail;
233 static int brcmf_sdcard_recv_prepare(struct brcmf_sdio_dev *sdiodev, uint fn,
234 uint flags, uint width, u32 *addr)
236 uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
239 /* Async not implemented yet */
240 if (flags & SDIO_REQ_ASYNC)
243 if (bar0 != sdiodev->sbwad) {
244 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
248 sdiodev->sbwad = bar0;
251 *addr &= SBSDIO_SB_OFT_ADDR_MASK;
254 *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
260 brcmf_sdcard_recv_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
261 uint flags, u8 *buf, uint nbytes)
263 struct sk_buff *mypkt;
266 mypkt = brcmu_pkt_buf_get_skb(nbytes);
268 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
273 err = brcmf_sdcard_recv_pkt(sdiodev, addr, fn, flags, mypkt);
275 memcpy(buf, mypkt->data, nbytes);
277 brcmu_pkt_buf_free_skb(mypkt);
282 brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
283 uint flags, struct sk_buff *pkt)
289 brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
292 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
293 err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
297 incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
298 err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_READ,
304 int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
305 uint flags, struct sk_buff_head *pktq)
311 brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
312 fn, addr, pktq->qlen);
314 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
315 err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
319 incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
320 err = brcmf_sdioh_request_chain(sdiodev, incr_fix, SDIOH_READ, fn, addr,
327 brcmf_sdcard_send_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 memcpy(mypkt->data, buf, nbytes);
341 err = brcmf_sdcard_send_pkt(sdiodev, addr, fn, flags, mypkt);
343 brcmu_pkt_buf_free_skb(mypkt);
349 brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
350 uint flags, struct sk_buff *pkt)
354 uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
357 brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
360 /* Async not implemented yet */
361 if (flags & SDIO_REQ_ASYNC)
364 if (bar0 != sdiodev->sbwad) {
365 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
369 sdiodev->sbwad = bar0;
372 addr &= SBSDIO_SB_OFT_ADDR_MASK;
374 incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
375 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
377 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
379 return brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_WRITE, fn,
383 int brcmf_sdcard_rwdata(struct brcmf_sdio_dev *sdiodev, uint rw, u32 addr,
384 u8 *buf, uint nbytes)
386 struct sk_buff *mypkt;
387 bool write = rw ? SDIOH_WRITE : SDIOH_READ;
390 addr &= SBSDIO_SB_OFT_ADDR_MASK;
391 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
393 mypkt = brcmu_pkt_buf_get_skb(nbytes);
395 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
400 /* For a write, copy the buffer data into the packet. */
402 memcpy(mypkt->data, buf, nbytes);
404 err = brcmf_sdioh_request_buffer(sdiodev, SDIOH_DATA_INC, write,
405 SDIO_FUNC_1, addr, mypkt);
407 /* For a read, copy the packet data back to the buffer. */
409 memcpy(buf, mypkt->data, nbytes);
411 brcmu_pkt_buf_free_skb(mypkt);
415 int brcmf_sdcard_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
417 char t_func = (char)fn;
418 brcmf_dbg(TRACE, "Enter\n");
420 /* issue abort cmd52 command through F0 */
421 brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE, SDIO_FUNC_0,
422 SDIO_CCCR_ABORT, &t_func);
424 brcmf_dbg(TRACE, "Exit\n");
428 int brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
433 ret = brcmf_sdioh_attach(sdiodev);
439 /* Report the BAR, to fix if needed */
440 sdiodev->sbwad = SI_ENUM_BASE;
442 /* try to attach to the target device */
443 sdiodev->bus = brcmf_sdbrcm_probe(regs, sdiodev);
445 brcmf_dbg(ERROR, "device attach failed\n");
452 brcmf_sdio_remove(sdiodev);
456 EXPORT_SYMBOL(brcmf_sdio_probe);
458 int brcmf_sdio_remove(struct brcmf_sdio_dev *sdiodev)
461 brcmf_sdbrcm_disconnect(sdiodev->bus);
465 brcmf_sdioh_detach(sdiodev);
471 EXPORT_SYMBOL(brcmf_sdio_remove);
473 void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev *sdiodev, bool enable)
476 brcmf_sdbrcm_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
478 brcmf_sdbrcm_wd_timer(sdiodev->bus, 0);