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yaml
---
r: 289974
b: refs/heads/master
c: 1195d89
h: refs/heads/master
v: v3
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Ilan Elias authored and John W. Linville committed Jan 24, 2012
1 parent 97fee46 commit e47a948
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Showing 2 changed files with 285 additions and 5 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 3ed1326d2e693d555e62241c2e2209f01506214e
refs/heads/master: 1195d89b2defd92829ed54938e60312e62dc8747
288 changes: 284 additions & 4 deletions trunk/drivers/nfc/nfcwilink.c
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,7 @@
#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>
Expand All @@ -41,28 +42,296 @@
#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 st_register_completed;

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 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;

nfc_dev_dbg(&drv->pdev->dev, "get_bts_file_name entry");

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

skb->dev = (void *)drv->ndev;

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(skb);
if (rc)
return rc;

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

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

if ((drv->nfcc_info.plen != 5) || (drv->nfcc_info.status != 0)) {
nfc_dev_err(&drv->pdev->dev,
"invalid nci_vs_nfcc_info_rsp");
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_dev_info(&drv->pdev->dev, "nfcwilink FW file name: %s", 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;

nfc_dev_dbg(&drv->pdev->dev, "send_bts_cmd entry");

/* 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_dev_err(&drv->pdev->dev,
"ignoring invalid bts cmd, len %d, chnl %d, opcode %d",
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_dev_err(&drv->pdev->dev, "no memory for bts cmd");
return -ENOMEM;
}

skb->dev = (void *)drv->ndev;

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

rc = nfcwilink_send(skb);
if (rc)
return rc;

comp_ret = wait_for_completion_timeout(&drv->completed,
msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT));
nfc_dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld",
comp_ret);
if (comp_ret == 0) {
nfc_dev_err(&drv->pdev->dev,
"timeout on wait_for_completion_timeout");
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;

nfc_dev_dbg(&drv->pdev->dev, "download_fw entry");

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_dev_err(&drv->pdev->dev, "request_firmware failed %d", 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)) {
nfc_dev_dbg(&drv->pdev->dev,
"request_firmware returned size %d", len);
goto release_fw;
}

if (__le32_to_cpu(((struct bts_file_hdr *)ptr)->magic) !=
BTS_FILE_HDR_MAGIC) {
nfc_dev_err(&drv->pdev->dev, "wrong bts magic number");
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);

nfc_dev_dbg(&drv->pdev->dev, "bts_file_action type %d, len %d",
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)
{
Expand All @@ -74,7 +343,7 @@ static void nfcwilink_register_complete(void *priv_data, char data)
drv->st_register_cb_status = data;

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

/* Called by ST when receive data is available */
Expand All @@ -97,6 +366,11 @@ static long nfcwilink_receive(void *priv_data, struct sk_buff *skb)
(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;
}

skb->dev = (void *) drv->ndev;

/* Forward skb to NCI core layer */
Expand Down Expand Up @@ -137,14 +411,14 @@ static int nfcwilink_open(struct nci_dev *ndev)

nfcwilink_proto.priv_data = drv;

init_completion(&drv->st_register_completed);
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->st_register_completed,
&drv->completed,
msecs_to_jiffies(NFCWILINK_REGISTER_TIMEOUT));

nfc_dev_dbg(&drv->pdev->dev,
Expand Down Expand Up @@ -172,6 +446,12 @@ static int nfcwilink_open(struct nci_dev *ndev)
BUG_ON(nfcwilink_proto.write == NULL);
drv->st_write = nfcwilink_proto.write;

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

goto exit;

clear_exit:
Expand Down

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