1/**
   2 * Marvell BT-over-SDIO driver: SDIO interface related functions.
   3 *
   4 * Copyright (C) 2009, Marvell International Ltd.
   5 *
   6 * This software file (the "File") is distributed by Marvell International
   7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8 * (the "License").  You may use, redistribute and/or modify this File in
   9 * accordance with the terms and conditions of the License, a copy of which
  10 * is available by writing to the Free Software Foundation, Inc.,
  11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13 *
  14 *
  15 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  16 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  17 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  18 * this warranty disclaimer.
  19 **/
  20
  21#include <linux/firmware.h>
  22#include <linux/slab.h>
 
  23
  24#include <linux/mmc/sdio_ids.h>
  25#include <linux/mmc/sdio_func.h>
 
 
  26
  27#include <net/bluetooth/bluetooth.h>
  28#include <net/bluetooth/hci_core.h>
  29
  30#include "btmrvl_drv.h"
  31#include "btmrvl_sdio.h"
  32
  33#define VERSION "1.0"
  34
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  35/* The btmrvl_sdio_remove() callback function is called
  36 * when user removes this module from kernel space or ejects
  37 * the card from the slot. The driver handles these 2 cases
  38 * differently.
  39 * If the user is removing the module, a MODULE_SHUTDOWN_REQ
  40 * command is sent to firmware and interrupt will be disabled.
  41 * If the card is removed, there is no need to send command
  42 * or disable interrupt.
  43 *
  44 * The variable 'user_rmmod' is used to distinguish these two
  45 * scenarios. This flag is initialized as FALSE in case the card
  46 * is removed, and will be set to TRUE for module removal when
  47 * module_exit function is called.
  48 */
  49static u8 user_rmmod;
  50static u8 sdio_ireg;
  51
  52static const struct btmrvl_sdio_card_reg btmrvl_reg_8688 = {
  53	.cfg = 0x03,
  54	.host_int_mask = 0x04,
  55	.host_intstatus = 0x05,
  56	.card_status = 0x20,
  57	.sq_read_base_addr_a0 = 0x10,
  58	.sq_read_base_addr_a1 = 0x11,
  59	.card_fw_status0 = 0x40,
  60	.card_fw_status1 = 0x41,
  61	.card_rx_len = 0x42,
  62	.card_rx_unit = 0x43,
  63	.io_port_0 = 0x00,
  64	.io_port_1 = 0x01,
  65	.io_port_2 = 0x02,
 
  66};
  67static const struct btmrvl_sdio_card_reg btmrvl_reg_8787 = {
  68	.cfg = 0x00,
  69	.host_int_mask = 0x02,
  70	.host_intstatus = 0x03,
  71	.card_status = 0x30,
  72	.sq_read_base_addr_a0 = 0x40,
  73	.sq_read_base_addr_a1 = 0x41,
  74	.card_revision = 0x5c,
  75	.card_fw_status0 = 0x60,
  76	.card_fw_status1 = 0x61,
  77	.card_rx_len = 0x62,
  78	.card_rx_unit = 0x63,
  79	.io_port_0 = 0x78,
  80	.io_port_1 = 0x79,
  81	.io_port_2 = 0x7a,
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  82};
  83
  84static const struct btmrvl_sdio_device btmrvl_sdio_sd6888 = {
  85	.helper		= "sd8688_helper.bin",
  86	.firmware	= "sd8688.bin",
  87	.reg		= &btmrvl_reg_8688,
 
  88	.sd_blksz_fw_dl	= 64,
 
  89};
  90
  91static const struct btmrvl_sdio_device btmrvl_sdio_sd8787 = {
  92	.helper		= NULL,
  93	.firmware	= "mrvl/sd8787_uapsta.bin",
  94	.reg		= &btmrvl_reg_8787,
 
  95	.sd_blksz_fw_dl	= 256,
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  96};
  97
  98static const struct sdio_device_id btmrvl_sdio_ids[] = {
  99	/* Marvell SD8688 Bluetooth device */
 100	{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
 101			.driver_data = (unsigned long) &btmrvl_sdio_sd6888 },
 102	/* Marvell SD8787 Bluetooth device */
 103	{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911A),
 104			.driver_data = (unsigned long) &btmrvl_sdio_sd8787 },
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 105
 106	{ }	/* Terminating entry */
 107};
 108
 109MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
 110
 111static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
 112{
 113	u8 reg;
 114	int ret;
 115
 116	reg = sdio_readb(card->func, card->reg->card_rx_unit, &ret);
 117	if (!ret)
 118		card->rx_unit = reg;
 119
 120	return ret;
 121}
 122
 123static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
 124{
 125	u8 fws0, fws1;
 126	int ret;
 127
 128	*dat = 0;
 129
 130	fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
 131	if (ret)
 132		return -EIO;
 133
 134	fws1 = sdio_readb(card->func, card->reg->card_fw_status1, &ret);
 135	if (ret)
 136		return -EIO;
 137
 138	*dat = (((u16) fws1) << 8) | fws0;
 139
 140	return 0;
 141}
 142
 143static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
 144{
 145	u8 reg;
 146	int ret;
 147
 148	reg = sdio_readb(card->func, card->reg->card_rx_len, &ret);
 149	if (!ret)
 150		*dat = (u16) reg << card->rx_unit;
 151
 152	return ret;
 153}
 154
 155static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
 156								u8 mask)
 157{
 158	int ret;
 159
 160	sdio_writeb(card->func, mask, card->reg->host_int_mask, &ret);
 161	if (ret) {
 162		BT_ERR("Unable to enable the host interrupt!");
 163		ret = -EIO;
 164	}
 165
 166	return ret;
 167}
 168
 169static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
 170								u8 mask)
 171{
 172	u8 host_int_mask;
 173	int ret;
 174
 175	host_int_mask = sdio_readb(card->func, card->reg->host_int_mask, &ret);
 176	if (ret)
 177		return -EIO;
 178
 179	host_int_mask &= ~mask;
 180
 181	sdio_writeb(card->func, host_int_mask, card->reg->host_int_mask, &ret);
 182	if (ret < 0) {
 183		BT_ERR("Unable to disable the host interrupt!");
 184		return -EIO;
 185	}
 186
 187	return 0;
 188}
 189
 190static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
 191{
 192	unsigned int tries;
 193	u8 status;
 194	int ret;
 195
 196	for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
 197		status = sdio_readb(card->func, card->reg->card_status,	&ret);
 198		if (ret)
 199			goto failed;
 200		if ((status & bits) == bits)
 201			return ret;
 202
 203		udelay(1);
 204	}
 205
 206	ret = -ETIMEDOUT;
 207
 208failed:
 209	BT_ERR("FAILED! ret=%d", ret);
 210
 211	return ret;
 212}
 213
 214static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
 215								int pollnum)
 216{
 217	int ret = -ETIMEDOUT;
 218	u16 firmwarestat;
 219	unsigned int tries;
 220
 221	 /* Wait for firmware to become ready */
 222	for (tries = 0; tries < pollnum; tries++) {
 223		if (btmrvl_sdio_read_fw_status(card, &firmwarestat) < 0)
 
 
 
 224			continue;
 225
 226		if (firmwarestat == FIRMWARE_READY) {
 227			ret = 0;
 228			break;
 229		} else {
 230			msleep(10);
 231		}
 232	}
 233
 234	return ret;
 235}
 236
 237static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
 238{
 239	const struct firmware *fw_helper = NULL;
 240	const u8 *helper = NULL;
 241	int ret;
 242	void *tmphlprbuf = NULL;
 243	int tmphlprbufsz, hlprblknow, helperlen;
 244	u8 *helperbuf;
 245	u32 tx_len;
 246
 247	ret = request_firmware(&fw_helper, card->helper,
 248						&card->func->dev);
 249	if ((ret < 0) || !fw_helper) {
 250		BT_ERR("request_firmware(helper) failed, error code = %d",
 251									ret);
 252		ret = -ENOENT;
 253		goto done;
 254	}
 255
 256	helper = fw_helper->data;
 257	helperlen = fw_helper->size;
 258
 259	BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
 260						helperlen, SDIO_BLOCK_SIZE);
 261
 262	tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 263
 264	tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL);
 265	if (!tmphlprbuf) {
 266		BT_ERR("Unable to allocate buffer for helper."
 267			" Terminating download");
 268		ret = -ENOMEM;
 269		goto done;
 270	}
 271
 272	helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
 273
 274	/* Perform helper data transfer */
 275	tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
 276			- SDIO_HEADER_LEN;
 277	hlprblknow = 0;
 278
 279	do {
 280		ret = btmrvl_sdio_poll_card_status(card,
 281					    CARD_IO_READY | DN_LD_CARD_RDY);
 282		if (ret < 0) {
 283			BT_ERR("Helper download poll status timeout @ %d",
 284				hlprblknow);
 285			goto done;
 286		}
 287
 288		/* Check if there is more data? */
 289		if (hlprblknow >= helperlen)
 290			break;
 291
 292		if (helperlen - hlprblknow < tx_len)
 293			tx_len = helperlen - hlprblknow;
 294
 295		/* Little-endian */
 296		helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
 297		helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
 298		helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
 299		helperbuf[3] = ((tx_len & 0xff000000) >> 24);
 300
 301		memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
 302				tx_len);
 303
 304		/* Now send the data */
 305		ret = sdio_writesb(card->func, card->ioport, helperbuf,
 306				FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
 307		if (ret < 0) {
 308			BT_ERR("IO error during helper download @ %d",
 309				hlprblknow);
 310			goto done;
 311		}
 312
 313		hlprblknow += tx_len;
 314	} while (true);
 315
 316	BT_DBG("Transferring helper image EOF block");
 317
 318	memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);
 319
 320	ret = sdio_writesb(card->func, card->ioport, helperbuf,
 321							SDIO_BLOCK_SIZE);
 322	if (ret < 0) {
 323		BT_ERR("IO error in writing helper image EOF block");
 324		goto done;
 325	}
 326
 327	ret = 0;
 328
 329done:
 330	kfree(tmphlprbuf);
 331	if (fw_helper)
 332		release_firmware(fw_helper);
 333
 334	return ret;
 335}
 336
 337static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
 338{
 339	const struct firmware *fw_firmware = NULL;
 340	const u8 *firmware = NULL;
 341	int firmwarelen, tmpfwbufsz, ret;
 342	unsigned int tries, offset;
 343	u8 base0, base1;
 344	void *tmpfwbuf = NULL;
 345	u8 *fwbuf;
 346	u16 len, blksz_dl = card->sd_blksz_fw_dl;
 347	int txlen = 0, tx_blocks = 0, count = 0;
 348
 349	ret = request_firmware(&fw_firmware, card->firmware,
 350							&card->func->dev);
 351	if ((ret < 0) || !fw_firmware) {
 352		BT_ERR("request_firmware(firmware) failed, error code = %d",
 353									ret);
 354		ret = -ENOENT;
 355		goto done;
 356	}
 357
 358	firmware = fw_firmware->data;
 359	firmwarelen = fw_firmware->size;
 360
 361	BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
 362
 363	tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 364	tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL);
 365	if (!tmpfwbuf) {
 366		BT_ERR("Unable to allocate buffer for firmware."
 367		       " Terminating download");
 368		ret = -ENOMEM;
 369		goto done;
 370	}
 371
 372	/* Ensure aligned firmware buffer */
 373	fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
 374
 375	/* Perform firmware data transfer */
 376	offset = 0;
 377	do {
 378		ret = btmrvl_sdio_poll_card_status(card,
 379					CARD_IO_READY | DN_LD_CARD_RDY);
 380		if (ret < 0) {
 381			BT_ERR("FW download with helper poll status"
 382						" timeout @ %d", offset);
 383			goto done;
 384		}
 385
 386		/* Check if there is more data ? */
 387		if (offset >= firmwarelen)
 388			break;
 389
 390		for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
 391			base0 = sdio_readb(card->func,
 392					card->reg->sq_read_base_addr_a0, &ret);
 393			if (ret) {
 394				BT_ERR("BASE0 register read failed:"
 395					" base0 = 0x%04X(%d)."
 396					" Terminating download",
 397					base0, base0);
 398				ret = -EIO;
 399				goto done;
 400			}
 401			base1 = sdio_readb(card->func,
 402					card->reg->sq_read_base_addr_a1, &ret);
 403			if (ret) {
 404				BT_ERR("BASE1 register read failed:"
 405					" base1 = 0x%04X(%d)."
 406					" Terminating download",
 407					base1, base1);
 408				ret = -EIO;
 409				goto done;
 410			}
 411
 412			len = (((u16) base1) << 8) | base0;
 413			if (len)
 414				break;
 415
 416			udelay(10);
 417		}
 418
 419		if (!len)
 420			break;
 421		else if (len > BTM_UPLD_SIZE) {
 422			BT_ERR("FW download failure @%d, invalid length %d",
 423								offset, len);
 424			ret = -EINVAL;
 425			goto done;
 426		}
 427
 428		txlen = len;
 429
 430		if (len & BIT(0)) {
 431			count++;
 432			if (count > MAX_WRITE_IOMEM_RETRY) {
 433				BT_ERR("FW download failure @%d, "
 434					"over max retry count", offset);
 435				ret = -EIO;
 436				goto done;
 437			}
 438			BT_ERR("FW CRC error indicated by the helper: "
 439				"len = 0x%04X, txlen = %d", len, txlen);
 440			len &= ~BIT(0);
 441			/* Set txlen to 0 so as to resend from same offset */
 442			txlen = 0;
 443		} else {
 444			count = 0;
 445
 446			/* Last block ? */
 447			if (firmwarelen - offset < txlen)
 448				txlen = firmwarelen - offset;
 449
 450			tx_blocks = (txlen + blksz_dl - 1) / blksz_dl;
 451
 452			memcpy(fwbuf, &firmware[offset], txlen);
 453		}
 454
 455		ret = sdio_writesb(card->func, card->ioport, fwbuf,
 456						tx_blocks * blksz_dl);
 457
 458		if (ret < 0) {
 459			BT_ERR("FW download, writesb(%d) failed @%d",
 460							count, offset);
 461			sdio_writeb(card->func, HOST_CMD53_FIN,
 462						card->reg->cfg, &ret);
 463			if (ret)
 464				BT_ERR("writeb failed (CFG)");
 465		}
 466
 467		offset += txlen;
 468	} while (true);
 469
 470	BT_DBG("FW download over, size %d bytes", offset);
 471
 472	ret = 0;
 473
 474done:
 475	kfree(tmpfwbuf);
 476
 477	if (fw_firmware)
 478		release_firmware(fw_firmware);
 479
 480	return ret;
 481}
 482
 483static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
 484{
 485	u16 buf_len = 0;
 486	int ret, buf_block_len, blksz;
 487	struct sk_buff *skb = NULL;
 488	u32 type;
 489	u8 *payload = NULL;
 490	struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
 491	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 492
 493	if (!card || !card->func) {
 494		BT_ERR("card or function is NULL!");
 495		ret = -EINVAL;
 496		goto exit;
 497	}
 498
 499	/* Read the length of data to be transferred */
 500	ret = btmrvl_sdio_read_rx_len(card, &buf_len);
 501	if (ret < 0) {
 502		BT_ERR("read rx_len failed");
 503		ret = -EIO;
 504		goto exit;
 505	}
 506
 507	blksz = SDIO_BLOCK_SIZE;
 508	buf_block_len = (buf_len + blksz - 1) / blksz;
 509
 510	if (buf_len <= SDIO_HEADER_LEN
 511			|| (buf_block_len * blksz) > ALLOC_BUF_SIZE) {
 512		BT_ERR("invalid packet length: %d", buf_len);
 513		ret = -EINVAL;
 514		goto exit;
 515	}
 516
 517	/* Allocate buffer */
 518	skb = bt_skb_alloc(buf_block_len * blksz + BTSDIO_DMA_ALIGN,
 519								GFP_ATOMIC);
 520	if (skb == NULL) {
 521		BT_ERR("No free skb");
 
 522		goto exit;
 523	}
 524
 525	if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
 526		skb_put(skb, (unsigned long) skb->data &
 527					(BTSDIO_DMA_ALIGN - 1));
 528		skb_pull(skb, (unsigned long) skb->data &
 529					(BTSDIO_DMA_ALIGN - 1));
 530	}
 531
 532	payload = skb->data;
 533
 534	ret = sdio_readsb(card->func, payload, card->ioport,
 535			  buf_block_len * blksz);
 536	if (ret < 0) {
 537		BT_ERR("readsb failed: %d", ret);
 538		ret = -EIO;
 539		goto exit;
 540	}
 541
 542	/* This is SDIO specific header length: byte[2][1][0], type: byte[3]
 543	 * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
 544	 */
 545
 546	buf_len = payload[0];
 547	buf_len |= (u16) payload[1] << 8;
 
 
 
 
 
 
 
 
 
 548	type = payload[3];
 549
 550	switch (type) {
 551	case HCI_ACLDATA_PKT:
 552	case HCI_SCODATA_PKT:
 553	case HCI_EVENT_PKT:
 554		bt_cb(skb)->pkt_type = type;
 555		skb->dev = (void *)hdev;
 556		skb_put(skb, buf_len);
 557		skb_pull(skb, SDIO_HEADER_LEN);
 558
 559		if (type == HCI_EVENT_PKT)
 560			btmrvl_check_evtpkt(priv, skb);
 
 
 
 
 561
 562		hci_recv_frame(skb);
 563		hdev->stat.byte_rx += buf_len;
 564		break;
 565
 566	case MRVL_VENDOR_PKT:
 567		bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
 568		skb->dev = (void *)hdev;
 569		skb_put(skb, buf_len);
 570		skb_pull(skb, SDIO_HEADER_LEN);
 571
 572		if (btmrvl_process_event(priv, skb))
 573			hci_recv_frame(skb);
 574
 575		hdev->stat.byte_rx += buf_len;
 576		break;
 577
 578	default:
 579		BT_ERR("Unknown packet type:%d", type);
 580		print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, payload,
 581						blksz * buf_block_len);
 582
 583		kfree_skb(skb);
 584		skb = NULL;
 585		break;
 586	}
 587
 588exit:
 589	if (ret) {
 590		hdev->stat.err_rx++;
 591		if (skb)
 592			kfree_skb(skb);
 593	}
 594
 595	return ret;
 596}
 597
 598static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv)
 599{
 600	ulong flags;
 601	u8 ireg;
 602	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 603
 604	spin_lock_irqsave(&priv->driver_lock, flags);
 605	ireg = sdio_ireg;
 606	sdio_ireg = 0;
 607	spin_unlock_irqrestore(&priv->driver_lock, flags);
 608
 609	sdio_claim_host(card->func);
 610	if (ireg & DN_LD_HOST_INT_STATUS) {
 611		if (priv->btmrvl_dev.tx_dnld_rdy)
 612			BT_DBG("tx_done already received: "
 613				" int_status=0x%x", ireg);
 614		else
 615			priv->btmrvl_dev.tx_dnld_rdy = true;
 616	}
 617
 618	if (ireg & UP_LD_HOST_INT_STATUS)
 619		btmrvl_sdio_card_to_host(priv);
 620
 621	sdio_release_host(card->func);
 622
 623	return 0;
 624}
 625
 626static void btmrvl_sdio_interrupt(struct sdio_func *func)
 627{
 628	struct btmrvl_private *priv;
 629	struct btmrvl_sdio_card *card;
 630	ulong flags;
 631	u8 ireg = 0;
 632	int ret;
 633
 634	card = sdio_get_drvdata(func);
 635	if (!card || !card->priv) {
 636		BT_ERR("sbi_interrupt(%p) card or priv is "
 637				"NULL, card=%p\n", func, card);
 638		return;
 639	}
 640
 641	priv = card->priv;
 
 
 
 
 
 
 
 
 642
 643	ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret);
 644	if (ret) {
 645		BT_ERR("sdio_readb: read int status register failed");
 646		return;
 647	}
 648
 649	if (ireg != 0) {
 650		/*
 651		 * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
 652		 * Clear the interrupt status register and re-enable the
 653		 * interrupt.
 654		 */
 655		BT_DBG("ireg = 0x%x", ireg);
 656
 657		sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS |
 658					UP_LD_HOST_INT_STATUS),
 659				card->reg->host_intstatus, &ret);
 660		if (ret) {
 661			BT_ERR("sdio_writeb: clear int status register failed");
 662			return;
 663		}
 664	}
 665
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 666	spin_lock_irqsave(&priv->driver_lock, flags);
 667	sdio_ireg |= ireg;
 668	spin_unlock_irqrestore(&priv->driver_lock, flags);
 669
 670	btmrvl_interrupt(priv);
 671}
 672
 673static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
 674{
 675	struct sdio_func *func;
 676	u8 reg;
 677	int ret = 0;
 678
 679	if (!card || !card->func) {
 680		BT_ERR("Error: card or function is NULL!");
 681		ret = -EINVAL;
 682		goto failed;
 683	}
 684
 685	func = card->func;
 686
 687	sdio_claim_host(func);
 688
 689	ret = sdio_enable_func(func);
 690	if (ret) {
 691		BT_ERR("sdio_enable_func() failed: ret=%d", ret);
 692		ret = -EIO;
 693		goto release_host;
 694	}
 695
 696	ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
 697	if (ret) {
 698		BT_ERR("sdio_claim_irq failed: ret=%d", ret);
 699		ret = -EIO;
 700		goto disable_func;
 701	}
 702
 703	ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
 704	if (ret) {
 705		BT_ERR("cannot set SDIO block size");
 706		ret = -EIO;
 707		goto release_irq;
 708	}
 709
 710	reg = sdio_readb(func, card->reg->io_port_0, &ret);
 711	if (ret < 0) {
 712		ret = -EIO;
 713		goto release_irq;
 714	}
 715
 716	card->ioport = reg;
 717
 718	reg = sdio_readb(func, card->reg->io_port_1, &ret);
 719	if (ret < 0) {
 720		ret = -EIO;
 721		goto release_irq;
 722	}
 723
 724	card->ioport |= (reg << 8);
 725
 726	reg = sdio_readb(func, card->reg->io_port_2, &ret);
 727	if (ret < 0) {
 728		ret = -EIO;
 729		goto release_irq;
 730	}
 731
 732	card->ioport |= (reg << 16);
 733
 734	BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
 735
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 736	sdio_set_drvdata(func, card);
 737
 738	sdio_release_host(func);
 739
 740	return 0;
 741
 742release_irq:
 743	sdio_release_irq(func);
 744
 745disable_func:
 746	sdio_disable_func(func);
 747
 748release_host:
 749	sdio_release_host(func);
 750
 751failed:
 752	return ret;
 753}
 754
 755static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
 756{
 757	if (card && card->func) {
 758		sdio_claim_host(card->func);
 759		sdio_release_irq(card->func);
 760		sdio_disable_func(card->func);
 761		sdio_release_host(card->func);
 762		sdio_set_drvdata(card->func, NULL);
 763	}
 764
 765	return 0;
 766}
 767
 768static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
 769{
 770	int ret;
 771
 772	if (!card || !card->func)
 773		return -EINVAL;
 774
 775	sdio_claim_host(card->func);
 776
 777	ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
 778
 779	btmrvl_sdio_get_rx_unit(card);
 780
 781	sdio_release_host(card->func);
 782
 783	return ret;
 784}
 785
 786static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
 787{
 788	int ret;
 789
 790	if (!card || !card->func)
 791		return -EINVAL;
 792
 793	sdio_claim_host(card->func);
 794
 795	ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
 796
 797	sdio_release_host(card->func);
 798
 799	return ret;
 800}
 801
 802static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
 803				u8 *payload, u16 nb)
 804{
 805	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 806	int ret = 0;
 807	int buf_block_len;
 808	int blksz;
 809	int i = 0;
 810	u8 *buf = NULL;
 811	void *tmpbuf = NULL;
 812	int tmpbufsz;
 813
 814	if (!card || !card->func) {
 815		BT_ERR("card or function is NULL!");
 816		return -EINVAL;
 817	}
 818
 
 
 819	buf = payload;
 820	if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
 821		tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
 
 
 822		tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
 823		if (!tmpbuf)
 824			return -ENOMEM;
 825		buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
 826		memcpy(buf, payload, nb);
 827	}
 828
 829	blksz = SDIO_BLOCK_SIZE;
 830	buf_block_len = (nb + blksz - 1) / blksz;
 831
 832	sdio_claim_host(card->func);
 833
 834	do {
 835		/* Transfer data to card */
 836		ret = sdio_writesb(card->func, card->ioport, buf,
 837				   buf_block_len * blksz);
 838		if (ret < 0) {
 839			i++;
 840			BT_ERR("i=%d writesb failed: %d", i, ret);
 841			print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
 842						payload, nb);
 843			ret = -EIO;
 844			if (i > MAX_WRITE_IOMEM_RETRY)
 845				goto exit;
 846		}
 847	} while (ret);
 848
 849	priv->btmrvl_dev.tx_dnld_rdy = false;
 850
 851exit:
 852	sdio_release_host(card->func);
 853	kfree(tmpbuf);
 854
 855	return ret;
 856}
 857
 858static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
 859{
 860	int ret = 0;
 861	u8 fws0;
 862	int pollnum = MAX_POLL_TRIES;
 863
 864	if (!card || !card->func) {
 865		BT_ERR("card or function is NULL!");
 866		return -EINVAL;
 867	}
 868	sdio_claim_host(card->func);
 869
 870	if (!btmrvl_sdio_verify_fw_download(card, 1)) {
 871		BT_DBG("Firmware already downloaded!");
 872		goto done;
 873	}
 874
 
 
 875	/* Check if other function driver is downloading the firmware */
 876	fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
 877	if (ret) {
 878		BT_ERR("Failed to read FW downloading status!");
 879		ret = -EIO;
 880		goto done;
 881	}
 882	if (fws0) {
 883		BT_DBG("BT not the winner (%#x). Skip FW downloading", fws0);
 884
 885		/* Give other function more time to download the firmware */
 886		pollnum *= 10;
 887	} else {
 888		if (card->helper) {
 889			ret = btmrvl_sdio_download_helper(card);
 890			if (ret) {
 891				BT_ERR("Failed to download helper!");
 892				ret = -EIO;
 893				goto done;
 894			}
 895		}
 896
 897		if (btmrvl_sdio_download_fw_w_helper(card)) {
 898			BT_ERR("Failed to download firmware!");
 899			ret = -EIO;
 900			goto done;
 901		}
 902	}
 903
 
 
 
 
 904	if (btmrvl_sdio_verify_fw_download(card, pollnum)) {
 905		BT_ERR("FW failed to be active in time!");
 906		ret = -ETIMEDOUT;
 907		goto done;
 908	}
 909
 910done:
 911	sdio_release_host(card->func);
 912
 
 
 
 
 913	return ret;
 914}
 915
 916static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
 917{
 918	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 919	int ret = 0;
 920
 921	if (!card || !card->func) {
 922		BT_ERR("card or function is NULL!");
 923		return -EINVAL;
 924	}
 925
 926	sdio_claim_host(card->func);
 927
 928	sdio_writeb(card->func, HOST_POWER_UP, card->reg->cfg, &ret);
 929
 930	sdio_release_host(card->func);
 931
 932	BT_DBG("wake up firmware");
 933
 934	return ret;
 935}
 936
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 937static int btmrvl_sdio_probe(struct sdio_func *func,
 938					const struct sdio_device_id *id)
 939{
 940	int ret = 0;
 941	struct btmrvl_private *priv = NULL;
 942	struct btmrvl_sdio_card *card = NULL;
 943
 944	BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
 945			id->vendor, id->device, id->class, func->num);
 946
 947	card = kzalloc(sizeof(*card), GFP_KERNEL);
 948	if (!card) {
 949		ret = -ENOMEM;
 950		goto done;
 951	}
 952
 953	card->func = func;
 954
 955	if (id->driver_data) {
 956		struct btmrvl_sdio_device *data = (void *) id->driver_data;
 957		card->helper = data->helper;
 958		card->firmware = data->firmware;
 959		card->reg = data->reg;
 960		card->sd_blksz_fw_dl = data->sd_blksz_fw_dl;
 
 
 961	}
 962
 963	if (btmrvl_sdio_register_dev(card) < 0) {
 964		BT_ERR("Failed to register BT device!");
 965		ret = -ENODEV;
 966		goto free_card;
 967	}
 968
 969	/* Disable the interrupts on the card */
 970	btmrvl_sdio_disable_host_int(card);
 971
 972	if (btmrvl_sdio_download_fw(card)) {
 973		BT_ERR("Downloading firmware failed!");
 974		ret = -ENODEV;
 975		goto unreg_dev;
 976	}
 977
 978	msleep(100);
 979
 980	btmrvl_sdio_enable_host_int(card);
 981
 
 
 
 982	priv = btmrvl_add_card(card);
 983	if (!priv) {
 984		BT_ERR("Initializing card failed!");
 985		ret = -ENODEV;
 986		goto disable_host_int;
 987	}
 988
 989	card->priv = priv;
 990
 991	/* Initialize the interface specific function pointers */
 992	priv->hw_host_to_card = btmrvl_sdio_host_to_card;
 993	priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
 994	priv->hw_process_int_status = btmrvl_sdio_process_int_status;
 995
 996	if (btmrvl_register_hdev(priv)) {
 997		BT_ERR("Register hdev failed!");
 998		ret = -ENODEV;
 999		goto disable_host_int;
1000	}
1001
1002	priv->btmrvl_dev.psmode = 1;
1003	btmrvl_enable_ps(priv);
1004
1005	return 0;
1006
1007disable_host_int:
1008	btmrvl_sdio_disable_host_int(card);
1009unreg_dev:
1010	btmrvl_sdio_unregister_dev(card);
1011free_card:
1012	kfree(card);
1013done:
1014	return ret;
1015}
1016
1017static void btmrvl_sdio_remove(struct sdio_func *func)
1018{
1019	struct btmrvl_sdio_card *card;
1020
1021	if (func) {
1022		card = sdio_get_drvdata(func);
1023		if (card) {
1024			/* Send SHUTDOWN command & disable interrupt
1025			 * if user removes the module.
1026			 */
1027			if (user_rmmod) {
1028				btmrvl_send_module_cfg_cmd(card->priv,
1029							MODULE_SHUTDOWN_REQ);
1030				btmrvl_sdio_disable_host_int(card);
1031			}
1032			BT_DBG("unregester dev");
 
 
1033			btmrvl_sdio_unregister_dev(card);
1034			btmrvl_remove_card(card->priv);
1035			kfree(card);
1036		}
1037	}
1038}
1039
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1040static struct sdio_driver bt_mrvl_sdio = {
1041	.name		= "btmrvl_sdio",
1042	.id_table	= btmrvl_sdio_ids,
1043	.probe		= btmrvl_sdio_probe,
1044	.remove		= btmrvl_sdio_remove,
 
 
 
 
 
1045};
1046
1047static int __init btmrvl_sdio_init_module(void)
1048{
1049	if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
1050		BT_ERR("SDIO Driver Registration Failed");
1051		return -ENODEV;
1052	}
1053
1054	/* Clear the flag in case user removes the card. */
1055	user_rmmod = 0;
1056
1057	return 0;
1058}
1059
1060static void __exit btmrvl_sdio_exit_module(void)
1061{
1062	/* Set the flag as user is removing this module. */
1063	user_rmmod = 1;
1064
1065	sdio_unregister_driver(&bt_mrvl_sdio);
1066}
1067
1068module_init(btmrvl_sdio_init_module);
1069module_exit(btmrvl_sdio_exit_module);
1070
1071MODULE_AUTHOR("Marvell International Ltd.");
1072MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1073MODULE_VERSION(VERSION);
1074MODULE_LICENSE("GPL v2");
1075MODULE_FIRMWARE("sd8688_helper.bin");
1076MODULE_FIRMWARE("sd8688.bin");
1077MODULE_FIRMWARE("mrvl/sd8787_uapsta.bin");