[deliverable/linux.git] / drivers / nfc / nfcwilink.c

/*
 *  Texas Instrument's NFC Driver For Shared Transport.
 *
 *  NFC Driver acts as interface between NCI core and
 *  TI Shared Transport Layer.
 *
 *  Copyright (C) 2011 Texas Instruments, Inc.
 *
 *  Written by Ilan Elias <ilane@ti.com>
 *
 *  Acknowledgements:
 *  This file is based on btwilink.c, which was written
 *  by Raja Mani and Pavan Savoy.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/firmware.h>
#include <linux/nfc.h>
#include <net/nfc/nci.h>
#include <net/nfc/nci_core.h>
#include <linux/ti_wilink_st.h>

#define NFCWILINK_CHNL			12
#define NFCWILINK_OPCODE		7
#define NFCWILINK_MAX_FRAME_SIZE	300
#define NFCWILINK_HDR_LEN		4
#define NFCWILINK_OFFSET_LEN_IN_HDR	1
#define NFCWILINK_LEN_SIZE		2
#define NFCWILINK_REGISTER_TIMEOUT	8000	/* 8 sec */
#define NFCWILINK_CMD_TIMEOUT		5000	/* 5 sec */

#define BTS_FILE_NAME_MAX_SIZE		40
#define BTS_FILE_HDR_MAGIC		0x42535442
#define BTS_FILE_CMD_MAX_LEN		0xff
#define BTS_FILE_ACTION_TYPE_SEND_CMD	1

#define NCI_VS_NFCC_INFO_CMD_GID	0x2f
#define NCI_VS_NFCC_INFO_CMD_OID	0x12
#define NCI_VS_NFCC_INFO_RSP_GID	0x4f
#define NCI_VS_NFCC_INFO_RSP_OID	0x12

struct nfcwilink_hdr {
	__u8 chnl;
	__u8 opcode;
	__le16 len;
} __packed;

struct nci_vs_nfcc_info_cmd {
	__u8 gid;
	__u8 oid;
	__u8 plen;
} __packed;

struct nci_vs_nfcc_info_rsp {
	__u8 gid;
	__u8 oid;
	__u8 plen;
	__u8 status;
	__u8 hw_id;
	__u8 sw_ver_x;
	__u8 sw_ver_z;
	__u8 patch_id;
} __packed;

struct bts_file_hdr {
	__le32 magic;
	__le32 ver;
	__u8 rfu[24];
	__u8 actions[0];
} __packed;

struct bts_file_action {
	__le16 type;
	__le16 len;
	__u8 data[0];
} __packed;

struct nfcwilink {
	struct platform_device		*pdev;
	struct nci_dev			*ndev;
	unsigned long			flags;

	char				st_register_cb_status;
	long				(*st_write) (struct sk_buff *);

	struct completion		completed;

	struct nci_vs_nfcc_info_rsp	nfcc_info;
};

/* NFCWILINK driver flags */
enum {
	NFCWILINK_RUNNING,
	NFCWILINK_FW_DOWNLOAD,
};

static int nfcwilink_send(struct nci_dev *ndev, struct sk_buff *skb);

static inline struct sk_buff *nfcwilink_skb_alloc(unsigned int len, gfp_t how)
{
	struct sk_buff *skb;

	skb = alloc_skb(len + NFCWILINK_HDR_LEN, how);
	if (skb)
		skb_reserve(skb, NFCWILINK_HDR_LEN);

	return skb;
}

static void nfcwilink_fw_download_receive(struct nfcwilink *drv,
						struct sk_buff *skb)
{
	struct nci_vs_nfcc_info_rsp *rsp = (void *)skb->data;

	/* Detect NCI_VS_NFCC_INFO_RSP and store the result */
	if ((skb->len > 3) && (rsp->gid == NCI_VS_NFCC_INFO_RSP_GID) &&
		(rsp->oid == NCI_VS_NFCC_INFO_RSP_OID)) {
		memcpy(&drv->nfcc_info, rsp,
			sizeof(struct nci_vs_nfcc_info_rsp));
	}

	kfree_skb(skb);

	complete(&drv->completed);
}

static int nfcwilink_get_bts_file_name(struct nfcwilink *drv, char *file_name)
{
	struct nci_vs_nfcc_info_cmd *cmd;
	struct sk_buff *skb;
	unsigned long comp_ret;
	int rc;

	skb = nfcwilink_skb_alloc(sizeof(struct nci_vs_nfcc_info_cmd),
					GFP_KERNEL);
	if (!skb) {
		nfc_err(&drv->pdev->dev,
			"no memory for nci_vs_nfcc_info_cmd\n");
		return -ENOMEM;
	}

	cmd = (struct nci_vs_nfcc_info_cmd *)
			skb_put(skb, sizeof(struct nci_vs_nfcc_info_cmd));
	cmd->gid = NCI_VS_NFCC_INFO_CMD_GID;
	cmd->oid = NCI_VS_NFCC_INFO_CMD_OID;
	cmd->plen = 0;

	drv->nfcc_info.plen = 0;

	rc = nfcwilink_send(drv->ndev, skb);
	if (rc)
		return rc;

	comp_ret = wait_for_completion_timeout(&drv->completed,
				msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT));
	dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld\n",
		comp_ret);
	if (comp_ret == 0) {
		nfc_err(&drv->pdev->dev,
			"timeout on wait_for_completion_timeout\n");
		return -ETIMEDOUT;
	}

	dev_dbg(&drv->pdev->dev, "nci_vs_nfcc_info_rsp: plen %d, status %d\n",
		drv->nfcc_info.plen, drv->nfcc_info.status);

	if ((drv->nfcc_info.plen != 5) || (drv->nfcc_info.status != 0)) {
		nfc_err(&drv->pdev->dev, "invalid nci_vs_nfcc_info_rsp\n");
		return -EINVAL;
	}

	snprintf(file_name, BTS_FILE_NAME_MAX_SIZE,
			"TINfcInit_%d.%d.%d.%d.bts",
			drv->nfcc_info.hw_id,
			drv->nfcc_info.sw_ver_x,
			drv->nfcc_info.sw_ver_z,
			drv->nfcc_info.patch_id);

	nfc_info(&drv->pdev->dev, "nfcwilink FW file name: %s\n", file_name);

	return 0;
}

static int nfcwilink_send_bts_cmd(struct nfcwilink *drv, __u8 *data, int len)
{
	struct nfcwilink_hdr *hdr = (struct nfcwilink_hdr *)data;
	struct sk_buff *skb;
	unsigned long comp_ret;
	int rc;

	/* verify valid cmd for the NFC channel */
	if ((len <= sizeof(struct nfcwilink_hdr)) ||
		(len > BTS_FILE_CMD_MAX_LEN) ||
		(hdr->chnl != NFCWILINK_CHNL) ||
		(hdr->opcode != NFCWILINK_OPCODE)) {
		nfc_err(&drv->pdev->dev,
			"ignoring invalid bts cmd, len %d, chnl %d, opcode %d\n",
			len, hdr->chnl, hdr->opcode);
		return 0;
	}

	/* remove the ST header */
	len -= sizeof(struct nfcwilink_hdr);
	data += sizeof(struct nfcwilink_hdr);

	skb = nfcwilink_skb_alloc(len, GFP_KERNEL);
	if (!skb) {
		nfc_err(&drv->pdev->dev, "no memory for bts cmd\n");
		return -ENOMEM;
	}

	memcpy(skb_put(skb, len), data, len);

	rc = nfcwilink_send(drv->ndev, skb);
	if (rc)
		return rc;

	comp_ret = wait_for_completion_timeout(&drv->completed,
				msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT));
	dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld\n",
		comp_ret);
	if (comp_ret == 0) {
		nfc_err(&drv->pdev->dev,
			"timeout on wait_for_completion_timeout\n");
		return -ETIMEDOUT;
	}

	return 0;
}

static int nfcwilink_download_fw(struct nfcwilink *drv)
{
	unsigned char file_name[BTS_FILE_NAME_MAX_SIZE];
	const struct firmware *fw;
	__u16 action_type, action_len;
	__u8 *ptr;
	int len, rc;

	set_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags);

	rc = nfcwilink_get_bts_file_name(drv, file_name);
	if (rc)
		goto exit;

	rc = request_firmware(&fw, file_name, &drv->pdev->dev);
	if (rc) {
		nfc_err(&drv->pdev->dev, "request_firmware failed %d\n", rc);

		/* if the file is not found, don't exit with failure */
		if (rc == -ENOENT)
			rc = 0;

		goto exit;
	}

	len = fw->size;
	ptr = (__u8 *)fw->data;

	if ((len == 0) || (ptr == NULL)) {
		dev_dbg(&drv->pdev->dev,
			"request_firmware returned size %d\n", len);
		goto release_fw;
	}

	if (__le32_to_cpu(((struct bts_file_hdr *)ptr)->magic) !=
			BTS_FILE_HDR_MAGIC) {
		nfc_err(&drv->pdev->dev, "wrong bts magic number\n");
		rc = -EINVAL;
		goto release_fw;
	}

	/* remove the BTS header */
	len -= sizeof(struct bts_file_hdr);
	ptr += sizeof(struct bts_file_hdr);

	while (len > 0) {
		action_type =
			__le16_to_cpu(((struct bts_file_action *)ptr)->type);
		action_len =
			__le16_to_cpu(((struct bts_file_action *)ptr)->len);

		dev_dbg(&drv->pdev->dev, "bts_file_action type %d, len %d\n",
			action_type, action_len);

		switch (action_type) {
		case BTS_FILE_ACTION_TYPE_SEND_CMD:
			rc = nfcwilink_send_bts_cmd(drv,
					((struct bts_file_action *)ptr)->data,
					action_len);
			if (rc)
				goto release_fw;
			break;
		}

		/* advance to the next action */
		len -= (sizeof(struct bts_file_action) + action_len);
		ptr += (sizeof(struct bts_file_action) + action_len);
	}

release_fw:
	release_firmware(fw);

exit:
	clear_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags);
	return rc;
}

/* Called by ST when registration is complete */
static void nfcwilink_register_complete(void *priv_data, char data)
{
	struct nfcwilink *drv = priv_data;

	/* store ST registration status */
	drv->st_register_cb_status = data;

	/* complete the wait in nfc_st_open() */
	complete(&drv->completed);
}

/* Called by ST when receive data is available */
static long nfcwilink_receive(void *priv_data, struct sk_buff *skb)
{
	struct nfcwilink *drv = priv_data;
	int rc;

	if (!skb)
		return -EFAULT;

	if (!drv) {
		kfree_skb(skb);
		return -EFAULT;
	}

	dev_dbg(&drv->pdev->dev, "receive entry, len %d\n", skb->len);

	/* strip the ST header
	(apart for the chnl byte, which is not received in the hdr) */
	skb_pull(skb, (NFCWILINK_HDR_LEN-1));

	if (test_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags)) {
		nfcwilink_fw_download_receive(drv, skb);
		return 0;
	}

	/* Forward skb to NCI core layer */
	rc = nci_recv_frame(drv->ndev, skb);
	if (rc < 0) {
		nfc_err(&drv->pdev->dev, "nci_recv_frame failed %d\n", rc);
		return rc;
	}

	return 0;
}

/* protocol structure registered with ST */
static struct st_proto_s nfcwilink_proto = {
	.chnl_id = NFCWILINK_CHNL,
	.max_frame_size = NFCWILINK_MAX_FRAME_SIZE,
	.hdr_len = (NFCWILINK_HDR_LEN-1),	/* not including chnl byte */
	.offset_len_in_hdr = NFCWILINK_OFFSET_LEN_IN_HDR,
	.len_size = NFCWILINK_LEN_SIZE,
	.reserve = 0,
	.recv = nfcwilink_receive,
	.reg_complete_cb = nfcwilink_register_complete,
	.write = NULL,
};

static int nfcwilink_open(struct nci_dev *ndev)
{
	struct nfcwilink *drv = nci_get_drvdata(ndev);
	unsigned long comp_ret;
	int rc;

	if (test_and_set_bit(NFCWILINK_RUNNING, &drv->flags)) {
		rc = -EBUSY;
		goto exit;
	}

	nfcwilink_proto.priv_data = drv;

	init_completion(&drv->completed);
	drv->st_register_cb_status = -EINPROGRESS;

	rc = st_register(&nfcwilink_proto);
	if (rc < 0) {
		if (rc == -EINPROGRESS) {
			comp_ret = wait_for_completion_timeout(
			&drv->completed,
			msecs_to_jiffies(NFCWILINK_REGISTER_TIMEOUT));

			dev_dbg(&drv->pdev->dev,
				"wait_for_completion_timeout returned %ld\n",
				comp_ret);

			if (comp_ret == 0) {
				/* timeout */
				rc = -ETIMEDOUT;
				goto clear_exit;
			} else if (drv->st_register_cb_status != 0) {
				rc = drv->st_register_cb_status;
				nfc_err(&drv->pdev->dev,
					"st_register_cb failed %d\n", rc);
				goto clear_exit;
			}
		} else {
			nfc_err(&drv->pdev->dev, "st_register failed %d\n", rc);
			goto clear_exit;
		}
	}

	/* st_register MUST fill the write callback */
	BUG_ON(nfcwilink_proto.write == NULL);
	drv->st_write = nfcwilink_proto.write;

	if (nfcwilink_download_fw(drv)) {
		nfc_err(&drv->pdev->dev, "nfcwilink_download_fw failed %d\n",
			rc);
		/* open should succeed, even if the FW download failed */
	}

	goto exit;

clear_exit:
	clear_bit(NFCWILINK_RUNNING, &drv->flags);

exit:
	return rc;
}

static int nfcwilink_close(struct nci_dev *ndev)
{
	struct nfcwilink *drv = nci_get_drvdata(ndev);
	int rc;

	if (!test_and_clear_bit(NFCWILINK_RUNNING, &drv->flags))
		return 0;

	rc = st_unregister(&nfcwilink_proto);
	if (rc)
		nfc_err(&drv->pdev->dev, "st_unregister failed %d\n", rc);

	drv->st_write = NULL;

	return rc;
}

static int nfcwilink_send(struct nci_dev *ndev, struct sk_buff *skb)
{
	struct nfcwilink *drv = nci_get_drvdata(ndev);
	struct nfcwilink_hdr hdr = {NFCWILINK_CHNL, NFCWILINK_OPCODE, 0x0000};
	long len;

	dev_dbg(&drv->pdev->dev, "send entry, len %d\n", skb->len);

	if (!test_bit(NFCWILINK_RUNNING, &drv->flags)) {
		kfree_skb(skb);
		return -EINVAL;
	}

	/* add the ST hdr to the start of the buffer */
	hdr.len = cpu_to_le16(skb->len);
	memcpy(skb_push(skb, NFCWILINK_HDR_LEN), &hdr, NFCWILINK_HDR_LEN);

	/* Insert skb to shared transport layer's transmit queue.
	 * Freeing skb memory is taken care in shared transport layer,
	 * so don't free skb memory here.
	 */
	len = drv->st_write(skb);
	if (len < 0) {
		kfree_skb(skb);
		nfc_err(&drv->pdev->dev, "st_write failed %ld\n", len);
		return -EFAULT;
	}

	return 0;
}

static struct nci_ops nfcwilink_ops = {
	.open = nfcwilink_open,
	.close = nfcwilink_close,
	.send = nfcwilink_send,
};

static int nfcwilink_probe(struct platform_device *pdev)
{
	static struct nfcwilink *drv;
	int rc;
	__u32 protocols;

	drv = devm_kzalloc(&pdev->dev, sizeof(struct nfcwilink), GFP_KERNEL);
	if (!drv) {
		rc = -ENOMEM;
		goto exit;
	}

	drv->pdev = pdev;

	protocols = NFC_PROTO_JEWEL_MASK
		| NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
		| NFC_PROTO_ISO14443_MASK
		| NFC_PROTO_ISO14443_B_MASK
		| NFC_PROTO_NFC_DEP_MASK;

	drv->ndev = nci_allocate_device(&nfcwilink_ops,
					protocols,
					NFCWILINK_HDR_LEN,
					0);
	if (!drv->ndev) {
		nfc_err(&pdev->dev, "nci_allocate_device failed\n");
		rc = -ENOMEM;
		goto exit;
	}

	nci_set_parent_dev(drv->ndev, &pdev->dev);
	nci_set_drvdata(drv->ndev, drv);

	rc = nci_register_device(drv->ndev);
	if (rc < 0) {
		nfc_err(&pdev->dev, "nci_register_device failed %d\n", rc);
		goto free_dev_exit;
	}

	dev_set_drvdata(&pdev->dev, drv);

	goto exit;

free_dev_exit:
	nci_free_device(drv->ndev);

exit:
	return rc;
}

static int nfcwilink_remove(struct platform_device *pdev)
{
	struct nfcwilink *drv = dev_get_drvdata(&pdev->dev);
	struct nci_dev *ndev;

	if (!drv)
		return -EFAULT;

	ndev = drv->ndev;

	nci_unregister_device(ndev);
	nci_free_device(ndev);

	return 0;
}

static struct platform_driver nfcwilink_driver = {
	.probe = nfcwilink_probe,
	.remove = nfcwilink_remove,
	.driver = {
		.name = "nfcwilink",
		.owner = THIS_MODULE,
	},
};

module_platform_driver(nfcwilink_driver);

/* ------ Module Info ------ */

MODULE_AUTHOR("Ilan Elias <ilane@ti.com>");
MODULE_DESCRIPTION("NFC Driver for TI Shared Transport");
MODULE_LICENSE("GPL");
Commit	Line	Data
93aead46 IE	1	/*
	2	* Texas Instrument's NFC Driver For Shared Transport.
	3	*
	4	* NFC Driver acts as interface between NCI core and
	5	* TI Shared Transport Layer.
	6	*
	7	* Copyright (C) 2011 Texas Instruments, Inc.
	8	*
	9	* Written by Ilan Elias <ilane@ti.com>
	10	*
	11	* Acknowledgements:
	12	* This file is based on btwilink.c, which was written
	13	* by Raja Mani and Pavan Savoy.
	14	*
	15	* This program is free software; you can redistribute it and/or modify
	16	* it under the terms of the GNU General Public License version 2 as
	17	* published by the Free Software Foundation.
	18	*
	19	* This program is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	* GNU General Public License for more details.
	23	*
	24	* You should have received a copy of the GNU General Public License
	25	* along with this program; if not, write to the Free Software
	26	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	27	*
	28	*/
	29	#include <linux/platform_device.h>
baf79c33	30	#include <linux/module.h>
3ed1326d	31	#include <linux/types.h>
1195d89b	32	#include <linux/firmware.h>
93aead46 IE	33	#include <linux/nfc.h>
	34	#include <net/nfc/nci.h>
	35	#include <net/nfc/nci_core.h>
	36	#include <linux/ti_wilink_st.h>
	37
	38	#define NFCWILINK_CHNL 12
	39	#define NFCWILINK_OPCODE 7
	40	#define NFCWILINK_MAX_FRAME_SIZE 300
	41	#define NFCWILINK_HDR_LEN 4
	42	#define NFCWILINK_OFFSET_LEN_IN_HDR 1
	43	#define NFCWILINK_LEN_SIZE 2
	44	#define NFCWILINK_REGISTER_TIMEOUT 8000 /* 8 sec */
1195d89b IE	45	#define NFCWILINK_CMD_TIMEOUT 5000 /* 5 sec */
	46
	47	#define BTS_FILE_NAME_MAX_SIZE 40
	48	#define BTS_FILE_HDR_MAGIC 0x42535442
	49	#define BTS_FILE_CMD_MAX_LEN 0xff
	50	#define BTS_FILE_ACTION_TYPE_SEND_CMD 1
	51
	52	#define NCI_VS_NFCC_INFO_CMD_GID 0x2f
	53	#define NCI_VS_NFCC_INFO_CMD_OID 0x12
	54	#define NCI_VS_NFCC_INFO_RSP_GID 0x4f
	55	#define NCI_VS_NFCC_INFO_RSP_OID 0x12
93aead46 IE	56
93aead46 IE	57	struct nfcwilink_hdr {
3ed1326d IE	58	__u8 chnl;
	59	__u8 opcode;
	60	__le16 len;
93aead46 IE	61	} __packed;
93aead46 IE	62
1195d89b IE	63	struct nci_vs_nfcc_info_cmd {
	64	__u8 gid;
	65	__u8 oid;
	66	__u8 plen;
	67	} __packed;
	68
	69	struct nci_vs_nfcc_info_rsp {
	70	__u8 gid;
	71	__u8 oid;
	72	__u8 plen;
	73	__u8 status;
	74	__u8 hw_id;
	75	__u8 sw_ver_x;
	76	__u8 sw_ver_z;
	77	__u8 patch_id;
	78	} __packed;
	79
	80	struct bts_file_hdr {
	81	__le32 magic;
	82	__le32 ver;
	83	__u8 rfu[24];
	84	__u8 actions[0];
	85	} __packed;
	86
	87	struct bts_file_action {
	88	__le16 type;
	89	__le16 len;
	90	__u8 data[0];
	91	} __packed;
	92
93aead46 IE	93	struct nfcwilink {
	94	struct platform_device *pdev;
	95	struct nci_dev *ndev;
	96	unsigned long flags;
	97
	98	char st_register_cb_status;
	99	long (st_write) (struct sk_buff );
1195d89b IE	100
	101	struct completion completed;
	102
	103	struct nci_vs_nfcc_info_rsp nfcc_info;
93aead46 IE	104	};
	105
	106	/* NFCWILINK driver flags */
	107	enum {
	108	NFCWILINK_RUNNING,
1195d89b	109	NFCWILINK_FW_DOWNLOAD,
93aead46 IE	110	};
93aead46 IE	111
1095e69f	112	static int nfcwilink_send(struct nci_dev ndev, struct sk_buff skb);
1195d89b IE	113
	114	static inline struct sk_buff *nfcwilink_skb_alloc(unsigned int len, gfp_t how)
	115	{
	116	struct sk_buff *skb;
	117
	118	skb = alloc_skb(len + NFCWILINK_HDR_LEN, how);
	119	if (skb)
	120	skb_reserve(skb, NFCWILINK_HDR_LEN);
	121
	122	return skb;
	123	}
	124
	125	static void nfcwilink_fw_download_receive(struct nfcwilink *drv,
	126	struct sk_buff *skb)
	127	{
	128	struct nci_vs_nfcc_info_rsp rsp = (void )skb->data;
	129
	130	/* Detect NCI_VS_NFCC_INFO_RSP and store the result */
	131	if ((skb->len > 3) && (rsp->gid == NCI_VS_NFCC_INFO_RSP_GID) &&
	132	(rsp->oid == NCI_VS_NFCC_INFO_RSP_OID)) {
	133	memcpy(&drv->nfcc_info, rsp,
	134	sizeof(struct nci_vs_nfcc_info_rsp));
	135	}
	136
	137	kfree_skb(skb);
	138
	139	complete(&drv->completed);
	140	}
	141
	142	static int nfcwilink_get_bts_file_name(struct nfcwilink drv, char file_name)
	143	{
	144	struct nci_vs_nfcc_info_cmd *cmd;
	145	struct sk_buff *skb;
	146	unsigned long comp_ret;
	147	int rc;
	148
1195d89b IE	149	skb = nfcwilink_skb_alloc(sizeof(struct nci_vs_nfcc_info_cmd),
	150	GFP_KERNEL);
	151	if (!skb) {
073a625f JP	152	nfc_err(&drv->pdev->dev,
073a625f JP	153	"no memory for nci_vs_nfcc_info_cmd\n");
1195d89b IE	154	return -ENOMEM;
	155	}
	156
1195d89b IE	157	cmd = (struct nci_vs_nfcc_info_cmd *)
	158	skb_put(skb, sizeof(struct nci_vs_nfcc_info_cmd));
	159	cmd->gid = NCI_VS_NFCC_INFO_CMD_GID;
	160	cmd->oid = NCI_VS_NFCC_INFO_CMD_OID;
	161	cmd->plen = 0;
	162
	163	drv->nfcc_info.plen = 0;
	164
1095e69f	165	rc = nfcwilink_send(drv->ndev, skb);
1195d89b IE	166	if (rc)
	167	return rc;
	168
	169	comp_ret = wait_for_completion_timeout(&drv->completed,
	170	msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT));
b4834839 JP	171	dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld\n",
b4834839 JP	172	comp_ret);
1195d89b	173	if (comp_ret == 0) {
17936b43	174	nfc_err(&drv->pdev->dev,
b4834839	175	"timeout on wait_for_completion_timeout\n");
1195d89b IE	176	return -ETIMEDOUT;
	177	}
	178
b4834839 JP	179	dev_dbg(&drv->pdev->dev, "nci_vs_nfcc_info_rsp: plen %d, status %d\n",
b4834839 JP	180	drv->nfcc_info.plen, drv->nfcc_info.status);
1195d89b IE	181
1195d89b IE	182	if ((drv->nfcc_info.plen != 5) \|\| (drv->nfcc_info.status != 0)) {
073a625f	183	nfc_err(&drv->pdev->dev, "invalid nci_vs_nfcc_info_rsp\n");
1195d89b IE	184	return -EINVAL;
	185	}
	186
	187	snprintf(file_name, BTS_FILE_NAME_MAX_SIZE,
	188	"TINfcInit_%d.%d.%d.%d.bts",
	189	drv->nfcc_info.hw_id,
	190	drv->nfcc_info.sw_ver_x,
	191	drv->nfcc_info.sw_ver_z,
	192	drv->nfcc_info.patch_id);
	193
073a625f	194	nfc_info(&drv->pdev->dev, "nfcwilink FW file name: %s\n", file_name);
1195d89b IE	195
	196	return 0;
	197	}
	198
	199	static int nfcwilink_send_bts_cmd(struct nfcwilink drv, __u8 data, int len)
	200	{
	201	struct nfcwilink_hdr hdr = (struct nfcwilink_hdr )data;
	202	struct sk_buff *skb;
	203	unsigned long comp_ret;
	204	int rc;
	205
1195d89b IE	206	/* verify valid cmd for the NFC channel */
	207	if ((len <= sizeof(struct nfcwilink_hdr)) \|\|
	208	(len > BTS_FILE_CMD_MAX_LEN) \|\|
	209	(hdr->chnl != NFCWILINK_CHNL) \|\|
	210	(hdr->opcode != NFCWILINK_OPCODE)) {
073a625f JP	211	nfc_err(&drv->pdev->dev,
073a625f JP	212	"ignoring invalid bts cmd, len %d, chnl %d, opcode %d\n",
1195d89b IE	213	len, hdr->chnl, hdr->opcode);
	214	return 0;
	215	}
	216
	217	/* remove the ST header */
	218	len -= sizeof(struct nfcwilink_hdr);
	219	data += sizeof(struct nfcwilink_hdr);
	220
	221	skb = nfcwilink_skb_alloc(len, GFP_KERNEL);
	222	if (!skb) {
073a625f	223	nfc_err(&drv->pdev->dev, "no memory for bts cmd\n");
1195d89b IE	224	return -ENOMEM;
	225	}
	226
1195d89b IE	227	memcpy(skb_put(skb, len), data, len);
1195d89b IE	228
1095e69f	229	rc = nfcwilink_send(drv->ndev, skb);
1195d89b IE	230	if (rc)
	231	return rc;
	232
	233	comp_ret = wait_for_completion_timeout(&drv->completed,
	234	msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT));
b4834839 JP	235	dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld\n",
b4834839 JP	236	comp_ret);
1195d89b	237	if (comp_ret == 0) {
073a625f JP	238	nfc_err(&drv->pdev->dev,
073a625f JP	239	"timeout on wait_for_completion_timeout\n");
1195d89b IE	240	return -ETIMEDOUT;
	241	}
	242
	243	return 0;
	244	}
	245
	246	static int nfcwilink_download_fw(struct nfcwilink *drv)
	247	{
	248	unsigned char file_name[BTS_FILE_NAME_MAX_SIZE];
	249	const struct firmware *fw;
	250	__u16 action_type, action_len;
	251	__u8 *ptr;
	252	int len, rc;
	253
1195d89b IE	254	set_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags);
	255
	256	rc = nfcwilink_get_bts_file_name(drv, file_name);
	257	if (rc)
	258	goto exit;
	259
	260	rc = request_firmware(&fw, file_name, &drv->pdev->dev);
	261	if (rc) {
073a625f	262	nfc_err(&drv->pdev->dev, "request_firmware failed %d\n", rc);
1195d89b IE	263
	264	/* if the file is not found, don't exit with failure */
	265	if (rc == -ENOENT)
	266	rc = 0;
	267
	268	goto exit;
	269	}
	270
	271	len = fw->size;
	272	ptr = (__u8 *)fw->data;
	273
	274	if ((len == 0) \|\| (ptr == NULL)) {
b4834839 JP	275	dev_dbg(&drv->pdev->dev,
b4834839 JP	276	"request_firmware returned size %d\n", len);
1195d89b IE	277	goto release_fw;
	278	}
	279
	280	if (__le32_to_cpu(((struct bts_file_hdr *)ptr)->magic) !=
	281	BTS_FILE_HDR_MAGIC) {
073a625f	282	nfc_err(&drv->pdev->dev, "wrong bts magic number\n");
1195d89b IE	283	rc = -EINVAL;
	284	goto release_fw;
	285	}
	286
	287	/* remove the BTS header */
	288	len -= sizeof(struct bts_file_hdr);
	289	ptr += sizeof(struct bts_file_hdr);
	290
	291	while (len > 0) {
	292	action_type =
	293	__le16_to_cpu(((struct bts_file_action *)ptr)->type);
	294	action_len =
	295	__le16_to_cpu(((struct bts_file_action *)ptr)->len);
	296
b4834839 JP	297	dev_dbg(&drv->pdev->dev, "bts_file_action type %d, len %d\n",
b4834839 JP	298	action_type, action_len);
1195d89b IE	299
	300	switch (action_type) {
	301	case BTS_FILE_ACTION_TYPE_SEND_CMD:
	302	rc = nfcwilink_send_bts_cmd(drv,
	303	((struct bts_file_action *)ptr)->data,
	304	action_len);
	305	if (rc)
	306	goto release_fw;
	307	break;
	308	}
	309
	310	/* advance to the next action */
	311	len -= (sizeof(struct bts_file_action) + action_len);
	312	ptr += (sizeof(struct bts_file_action) + action_len);
	313	}
	314
	315	release_fw:
	316	release_firmware(fw);
	317
	318	exit:
	319	clear_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags);
	320	return rc;
	321	}
	322
93aead46 IE	323	/* Called by ST when registration is complete */
	324	static void nfcwilink_register_complete(void *priv_data, char data)
	325	{
	326	struct nfcwilink *drv = priv_data;
	327
93aead46 IE	328	/* store ST registration status */
	329	drv->st_register_cb_status = data;
	330
	331	/* complete the wait in nfc_st_open() */
1195d89b	332	complete(&drv->completed);
93aead46 IE	333	}
	334
	335	/* Called by ST when receive data is available */
	336	static long nfcwilink_receive(void priv_data, struct sk_buff skb)
	337	{
	338	struct nfcwilink *drv = priv_data;
	339	int rc;
	340
93aead46 IE	341	if (!skb)
	342	return -EFAULT;
	343
	344	if (!drv) {
	345	kfree_skb(skb);
	346	return -EFAULT;
	347	}
	348
b4834839	349	dev_dbg(&drv->pdev->dev, "receive entry, len %d\n", skb->len);
d6650a2c	350
93aead46 IE	351	/* strip the ST header
	352	(apart for the chnl byte, which is not received in the hdr) */
	353	skb_pull(skb, (NFCWILINK_HDR_LEN-1));
	354
1195d89b IE	355	if (test_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags)) {
	356	nfcwilink_fw_download_receive(drv, skb);
	357	return 0;
	358	}
	359
93aead46	360	/* Forward skb to NCI core layer */
1095e69f	361	rc = nci_recv_frame(drv->ndev, skb);
93aead46	362	if (rc < 0) {
073a625f	363	nfc_err(&drv->pdev->dev, "nci_recv_frame failed %d\n", rc);
93aead46 IE	364	return rc;
	365	}
	366
	367	return 0;
	368	}
	369
	370	/* protocol structure registered with ST */
	371	static struct st_proto_s nfcwilink_proto = {
	372	.chnl_id = NFCWILINK_CHNL,
	373	.max_frame_size = NFCWILINK_MAX_FRAME_SIZE,
	374	.hdr_len = (NFCWILINK_HDR_LEN-1), /* not including chnl byte */
	375	.offset_len_in_hdr = NFCWILINK_OFFSET_LEN_IN_HDR,
	376	.len_size = NFCWILINK_LEN_SIZE,
	377	.reserve = 0,
	378	.recv = nfcwilink_receive,
	379	.reg_complete_cb = nfcwilink_register_complete,
	380	.write = NULL,
	381	};
	382
	383	static int nfcwilink_open(struct nci_dev *ndev)
	384	{
	385	struct nfcwilink *drv = nci_get_drvdata(ndev);
	386	unsigned long comp_ret;
	387	int rc;
	388
93aead46 IE	389	if (test_and_set_bit(NFCWILINK_RUNNING, &drv->flags)) {
	390	rc = -EBUSY;
	391	goto exit;
	392	}
	393
	394	nfcwilink_proto.priv_data = drv;
	395
1195d89b	396	init_completion(&drv->completed);
93aead46 IE	397	drv->st_register_cb_status = -EINPROGRESS;
	398
	399	rc = st_register(&nfcwilink_proto);
	400	if (rc < 0) {
	401	if (rc == -EINPROGRESS) {
	402	comp_ret = wait_for_completion_timeout(
1195d89b	403	&drv->completed,
93aead46 IE	404	msecs_to_jiffies(NFCWILINK_REGISTER_TIMEOUT));
93aead46 IE	405
b4834839 JP	406	dev_dbg(&drv->pdev->dev,
	407	"wait_for_completion_timeout returned %ld\n",
	408	comp_ret);
93aead46 IE	409
	410	if (comp_ret == 0) {
	411	/* timeout */
	412	rc = -ETIMEDOUT;
	413	goto clear_exit;
	414	} else if (drv->st_register_cb_status != 0) {
	415	rc = drv->st_register_cb_status;
073a625f JP	416	nfc_err(&drv->pdev->dev,
073a625f JP	417	"st_register_cb failed %d\n", rc);
93aead46 IE	418	goto clear_exit;
	419	}
	420	} else {
073a625f	421	nfc_err(&drv->pdev->dev, "st_register failed %d\n", rc);
93aead46 IE	422	goto clear_exit;
	423	}
	424	}
	425
	426	/* st_register MUST fill the write callback */
	427	BUG_ON(nfcwilink_proto.write == NULL);
	428	drv->st_write = nfcwilink_proto.write;
	429
1195d89b	430	if (nfcwilink_download_fw(drv)) {
073a625f JP	431	nfc_err(&drv->pdev->dev, "nfcwilink_download_fw failed %d\n",
073a625f JP	432	rc);
1195d89b IE	433	/* open should succeed, even if the FW download failed */
	434	}
	435
93aead46 IE	436	goto exit;
	437
	438	clear_exit:
	439	clear_bit(NFCWILINK_RUNNING, &drv->flags);
	440
	441	exit:
	442	return rc;
	443	}
	444
	445	static int nfcwilink_close(struct nci_dev *ndev)
	446	{
	447	struct nfcwilink *drv = nci_get_drvdata(ndev);
	448	int rc;
	449
93aead46 IE	450	if (!test_and_clear_bit(NFCWILINK_RUNNING, &drv->flags))
	451	return 0;
	452
	453	rc = st_unregister(&nfcwilink_proto);
	454	if (rc)
073a625f	455	nfc_err(&drv->pdev->dev, "st_unregister failed %d\n", rc);
93aead46 IE	456
	457	drv->st_write = NULL;
	458
	459	return rc;
	460	}
	461
1095e69f	462	static int nfcwilink_send(struct nci_dev ndev, struct sk_buff skb)
93aead46	463	{
93aead46 IE	464	struct nfcwilink *drv = nci_get_drvdata(ndev);
	465	struct nfcwilink_hdr hdr = {NFCWILINK_CHNL, NFCWILINK_OPCODE, 0x0000};
	466	long len;
	467
b4834839	468	dev_dbg(&drv->pdev->dev, "send entry, len %d\n", skb->len);
93aead46	469
ea9917d6 IE	470	if (!test_bit(NFCWILINK_RUNNING, &drv->flags)) {
	471	kfree_skb(skb);
	472	return -EINVAL;
	473	}
93aead46 IE	474
93aead46 IE	475	/* add the ST hdr to the start of the buffer */
3ed1326d	476	hdr.len = cpu_to_le16(skb->len);
93aead46 IE	477	memcpy(skb_push(skb, NFCWILINK_HDR_LEN), &hdr, NFCWILINK_HDR_LEN);
	478
	479	/* Insert skb to shared transport layer's transmit queue.
	480	* Freeing skb memory is taken care in shared transport layer,
	481	* so don't free skb memory here.
	482	*/
	483	len = drv->st_write(skb);
	484	if (len < 0) {
	485	kfree_skb(skb);
073a625f	486	nfc_err(&drv->pdev->dev, "st_write failed %ld\n", len);
93aead46 IE	487	return -EFAULT;
	488	}
	489
	490	return 0;
	491	}
	492
	493	static struct nci_ops nfcwilink_ops = {
	494	.open = nfcwilink_open,
	495	.close = nfcwilink_close,
	496	.send = nfcwilink_send,
	497	};
	498
	499	static int nfcwilink_probe(struct platform_device *pdev)
	500	{
	501	static struct nfcwilink *drv;
	502	int rc;
3ed1326d	503	__u32 protocols;
93aead46	504
5f4d6214	505	drv = devm_kzalloc(&pdev->dev, sizeof(struct nfcwilink), GFP_KERNEL);
93aead46 IE	506	if (!drv) {
	507	rc = -ENOMEM;
	508	goto exit;
	509	}
	510
	511	drv->pdev = pdev;
	512
	513	protocols = NFC_PROTO_JEWEL_MASK
01d719a2 SO	514	\| NFC_PROTO_MIFARE_MASK \| NFC_PROTO_FELICA_MASK
	515	\| NFC_PROTO_ISO14443_MASK
	516	\| NFC_PROTO_ISO14443_B_MASK
	517	\| NFC_PROTO_NFC_DEP_MASK;
93aead46 IE	518
	519	drv->ndev = nci_allocate_device(&nfcwilink_ops,
	520	protocols,
	521	NFCWILINK_HDR_LEN,
	522	0);
	523	if (!drv->ndev) {
073a625f	524	nfc_err(&pdev->dev, "nci_allocate_device failed\n");
93aead46	525	rc = -ENOMEM;
5f4d6214	526	goto exit;
93aead46 IE	527	}
	528
	529	nci_set_parent_dev(drv->ndev, &pdev->dev);
	530	nci_set_drvdata(drv->ndev, drv);
	531
	532	rc = nci_register_device(drv->ndev);
	533	if (rc < 0) {
073a625f	534	nfc_err(&pdev->dev, "nci_register_device failed %d\n", rc);
93aead46 IE	535	goto free_dev_exit;
	536	}
	537
	538	dev_set_drvdata(&pdev->dev, drv);
	539
	540	goto exit;
	541
	542	free_dev_exit:
	543	nci_free_device(drv->ndev);
	544
93aead46 IE	545	exit:
	546	return rc;
	547	}
	548
	549	static int nfcwilink_remove(struct platform_device *pdev)
	550	{
	551	struct nfcwilink *drv = dev_get_drvdata(&pdev->dev);
	552	struct nci_dev *ndev;
	553
93aead46 IE	554	if (!drv)
	555	return -EFAULT;
	556
	557	ndev = drv->ndev;
	558
	559	nci_unregister_device(ndev);
	560	nci_free_device(ndev);
	561
93aead46 IE	562	return 0;
	563	}
	564
	565	static struct platform_driver nfcwilink_driver = {
	566	.probe = nfcwilink_probe,
	567	.remove = nfcwilink_remove,
	568	.driver = {
	569	.name = "nfcwilink",
	570	.owner = THIS_MODULE,
	571	},
	572	};
	573
058576dd	574	module_platform_driver(nfcwilink_driver);
93aead46 IE	575
	576	/* ------ Module Info ------ */
	577
	578	MODULE_AUTHOR("Ilan Elias <ilane@ti.com>");
	579	MODULE_DESCRIPTION("NFC Driver for TI Shared Transport");
	580	MODULE_LICENSE("GPL");