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Commit be9b720a authored by Tomas Winkler's avatar Tomas Winkler Committed by Greg Kroah-Hartman
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NFC: mei_phy: move all nfc logic from mei driver to nfc 

move nfc logic to mei_phy module, we prefer as much as
possible not to deal with a particualr client protocol
in the mei generic infrasutcutre

Cc: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 007d64eb
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Showing with 304 additions and 242 deletions
drivers/misc/mei/bus.c
View file @ be9b720a
......@@ -220,8 +220,7 @@ struct mei_cl *mei_cl_bus_find_cl_by_uuid(struct mei_device *dev,
struct mei_cl_device *mei_cl_add_device(struct mei_device *dev,
struct mei_me_client *me_cl,
struct mei_cl *cl,
char *name,
struct mei_cl_ops *ops)
char *name)
{
struct mei_cl_device *device;
int status;
......@@ -235,9 +234,8 @@ struct mei_cl_device *mei_cl_add_device(struct mei_device *dev,
kfree(device);
return NULL;
}
device->cl = cl;
device->ops = ops;
device->cl = cl;
device->dev.parent = dev->dev;
device->dev.bus = &mei_cl_bus_type;
device->dev.type = &mei_cl_device_type;
......@@ -294,7 +292,7 @@ void mei_cl_driver_unregister(struct mei_cl_driver *driver)
}
EXPORT_SYMBOL_GPL(mei_cl_driver_unregister);
static ssize_t ___mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
bool blocking)
{
struct mei_device *dev;
......@@ -408,16 +406,6 @@ ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
return rets;
}
inline ssize_t __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length)
{
return ___mei_cl_send(cl, buf, length, 0);
}
inline ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length)
{
return ___mei_cl_send(cl, buf, length, 1);
}
ssize_t mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length)
{
struct mei_cl *cl = device->cl;
......@@ -425,10 +413,7 @@ ssize_t mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length)
if (cl == NULL)
return -ENODEV;
if (device->ops && device->ops->send)
return device->ops->send(device, buf, length);
return __mei_cl_send(cl, buf, length);
return __mei_cl_send(cl, buf, length, 1);
}
EXPORT_SYMBOL_GPL(mei_cl_send);
......@@ -439,9 +424,6 @@ ssize_t mei_cl_recv(struct mei_cl_device *device, u8 *buf, size_t length)
if (cl == NULL)
return -ENODEV;
if (device->ops && device->ops->recv)
return device->ops->recv(device, buf, length);
return __mei_cl_recv(cl, buf, length);
}
EXPORT_SYMBOL_GPL(mei_cl_recv);
......@@ -522,10 +504,7 @@ int mei_cl_enable_device(struct mei_cl_device *device)
if (device->event_cb)
mei_cl_read_start(device->cl, 0, NULL);
if (!device->ops || !device->ops->enable)
return 0;
return device->ops->enable(device);
}
EXPORT_SYMBOL_GPL(mei_cl_enable_device);
......@@ -540,9 +519,6 @@ int mei_cl_disable_device(struct mei_cl_device *device)
dev = cl->dev;
if (device->ops && device->ops->disable)
device->ops->disable(device);
device->event_cb = NULL;
mutex_lock(&dev->device_lock);
......
drivers/misc/mei/mei_dev.h
View file @ be9b720a
......@@ -352,12 +352,11 @@ struct mei_cl_ops {
struct mei_cl_device *mei_cl_add_device(struct mei_device *dev,
struct mei_me_client *me_cl,
struct mei_cl *cl,
char *name,
struct mei_cl_ops *ops);
char *name);
void mei_cl_remove_device(struct mei_cl_device *device);
ssize_t __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length);
ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length);
ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
bool blocking);
ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length);
void mei_cl_bus_rx_event(struct mei_cl *cl);
void mei_cl_bus_remove_devices(struct mei_device *dev);
......
drivers/misc/mei/nfc.c
View file @ be9b720a
......@@ -95,28 +95,21 @@ struct mei_nfc_hci_hdr {
* @cl: NFC host client
* @cl_info: NFC info host client
* @init_work: perform connection to the info client
* @send_wq: send completion wait queue
* @fw_ivn: NFC Interface Version Number
* @vendor_id: NFC manufacturer ID
* @radio_type: NFC radio type
* @bus_name: bus name
*
* @req_id: message counter
* @recv_req_id: reception message counter
*/
struct mei_nfc_dev {
struct mei_me_client *me_cl;
struct mei_cl *cl;
struct mei_cl *cl_info;
struct work_struct init_work;
wait_queue_head_t send_wq;
u8 fw_ivn;
u8 vendor_id;
u8 radio_type;
char *bus_name;
u16 req_id;
u16 recv_req_id;
};
/* UUIDs for NFC F/W clients */
......@@ -202,73 +195,6 @@ static int mei_nfc_build_bus_name(struct mei_nfc_dev *ndev)
return 0;
}
static int mei_nfc_connect(struct mei_nfc_dev *ndev)
{
struct mei_device *dev;
struct mei_cl *cl;
struct mei_nfc_cmd *cmd, *reply;
struct mei_nfc_connect *connect;
struct mei_nfc_connect_resp *connect_resp;
size_t connect_length, connect_resp_length;
int bytes_recv, ret;
cl = ndev->cl;
dev = cl->dev;
connect_length = sizeof(struct mei_nfc_cmd) +
sizeof(struct mei_nfc_connect);
connect_resp_length = sizeof(struct mei_nfc_cmd) +
sizeof(struct mei_nfc_connect_resp);
cmd = kzalloc(connect_length, GFP_KERNEL);
if (!cmd)
return -ENOMEM;
connect = (struct mei_nfc_connect *)cmd->data;
reply = kzalloc(connect_resp_length, GFP_KERNEL);
if (!reply) {
kfree(cmd);
return -ENOMEM;
}
connect_resp = (struct mei_nfc_connect_resp *)reply->data;
cmd->command = MEI_NFC_CMD_MAINTENANCE;
cmd->data_size = 3;
cmd->sub_command = MEI_NFC_SUBCMD_CONNECT;
connect->fw_ivn = ndev->fw_ivn;
connect->vendor_id = ndev->vendor_id;
ret = __mei_cl_send(cl, (u8 *)cmd, connect_length);
if (ret < 0) {
dev_err(dev->dev, "Could not send connect cmd\n");
goto err;
}
bytes_recv = __mei_cl_recv(cl, (u8 *)reply, connect_resp_length);
if (bytes_recv < 0) {
dev_err(dev->dev, "Could not read connect response\n");
ret = bytes_recv;
goto err;
}
dev_info(dev->dev, "IVN 0x%x Vendor ID 0x%x\n",
connect_resp->fw_ivn, connect_resp->vendor_id);
dev_info(dev->dev, "ME FW %d.%d.%d.%d\n",
connect_resp->me_major, connect_resp->me_minor,
connect_resp->me_hotfix, connect_resp->me_build);
ret = 0;
err:
kfree(reply);
kfree(cmd);
return ret;
}
static int mei_nfc_if_version(struct mei_nfc_dev *ndev)
{
struct mei_device *dev;
......@@ -288,7 +214,7 @@ static int mei_nfc_if_version(struct mei_nfc_dev *ndev)
cmd.data_size = 1;
cmd.sub_command = MEI_NFC_SUBCMD_IF_VERSION;
ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(struct mei_nfc_cmd));
ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(struct mei_nfc_cmd), 1);
if (ret < 0) {
dev_err(dev->dev, "Could not send IF version cmd\n");
return ret;
......@@ -320,100 +246,6 @@ static int mei_nfc_if_version(struct mei_nfc_dev *ndev)
return ret;
}
static int mei_nfc_enable(struct mei_cl_device *cldev)
{
struct mei_device *dev;
struct mei_nfc_dev *ndev;
int ret;
ndev = (struct mei_nfc_dev *)cldev->priv_data;
dev = ndev->cl->dev;
ret = mei_nfc_connect(ndev);
if (ret < 0) {
dev_err(dev->dev, "Could not connect to NFC");
return ret;
}
return 0;
}
static int mei_nfc_disable(struct mei_cl_device *cldev)
{
return 0;
}
static int mei_nfc_send(struct mei_cl_device *cldev, u8 *buf, size_t length)
{
struct mei_device *dev;
struct mei_nfc_dev *ndev;
struct mei_nfc_hci_hdr *hdr;
u8 *mei_buf;
int err;
ndev = (struct mei_nfc_dev *) cldev->priv_data;
dev = ndev->cl->dev;
err = -ENOMEM;
mei_buf = kzalloc(length + MEI_NFC_HEADER_SIZE, GFP_KERNEL);
if (!mei_buf)
goto out;
hdr = (struct mei_nfc_hci_hdr *) mei_buf;
hdr->cmd = MEI_NFC_CMD_HCI_SEND;
hdr->status = 0;
hdr->req_id = ndev->req_id;
hdr->reserved = 0;
hdr->data_size = length;
memcpy(mei_buf + MEI_NFC_HEADER_SIZE, buf, length);
err = __mei_cl_send(ndev->cl, mei_buf, length + MEI_NFC_HEADER_SIZE);
if (err < 0)
goto out;
if (!wait_event_interruptible_timeout(ndev->send_wq,
ndev->recv_req_id == ndev->req_id, HZ)) {
dev_err(dev->dev, "NFC MEI command timeout\n");
err = -ETIME;
} else {
ndev->req_id++;
}
out:
kfree(mei_buf);
return err;
}
static int mei_nfc_recv(struct mei_cl_device *cldev, u8 *buf, size_t length)
{
struct mei_nfc_dev *ndev;
struct mei_nfc_hci_hdr *hci_hdr;
int received_length;
ndev = (struct mei_nfc_dev *)cldev->priv_data;
received_length = __mei_cl_recv(ndev->cl, buf, length);
if (received_length < 0)
return received_length;
hci_hdr = (struct mei_nfc_hci_hdr *) buf;
if (hci_hdr->cmd == MEI_NFC_CMD_HCI_SEND) {
ndev->recv_req_id = hci_hdr->req_id;
wake_up(&ndev->send_wq);
return 0;
}
return received_length;
}
static struct mei_cl_ops nfc_ops = {
.enable = mei_nfc_enable,
.disable = mei_nfc_disable,
.send = mei_nfc_send,
.recv = mei_nfc_recv,
};
static void mei_nfc_init(struct work_struct *work)
{
struct mei_device *dev;
......@@ -473,7 +305,7 @@ static void mei_nfc_init(struct work_struct *work)
}
cldev = mei_cl_add_device(dev, ndev->me_cl, ndev->cl,
ndev->bus_name, &nfc_ops);
ndev->bus_name);
if (!cldev) {
dev_err(dev->dev, "Could not add the NFC device to the MEI bus\n");
......@@ -539,10 +371,7 @@ int mei_nfc_host_init(struct mei_device *dev, struct mei_me_client *me_cl)
ndev->cl = cl;
ndev->req_id = 1;
INIT_WORK(&ndev->init_work, mei_nfc_init);
init_waitqueue_head(&ndev->send_wq);
schedule_work(&ndev->init_work);
return 0;
......
drivers/nfc/mei_phy.c
View file @ be9b720a
......@@ -24,7 +24,52 @@
#include "mei_phy.h"
struct mei_nfc_hdr {
struct mei_nfc_cmd {
u8 command;
u8 status;
u16 req_id;
u32 reserved;
u16 data_size;
u8 sub_command;
u8 data[];
} __packed;
struct mei_nfc_reply {
u8 command;
u8 status;
u16 req_id;
u32 reserved;
u16 data_size;
u8 sub_command;
u8 reply_status;
u8 data[];
} __packed;
struct mei_nfc_if_version {
u8 radio_version_sw[3];
u8 reserved[3];
u8 radio_version_hw[3];
u8 i2c_addr;
u8 fw_ivn;
u8 vendor_id;
u8 radio_type;
} __packed;
struct mei_nfc_connect {
u8 fw_ivn;
u8 vendor_id;
} __packed;
struct mei_nfc_connect_resp {
u8 fw_ivn;
u8 vendor_id;
u16 me_major;
u16 me_minor;
u16 me_hotfix;
u16 me_build;
} __packed;
struct mei_nfc_hci_hdr {
u8 cmd;
u8 status;
u16 req_id;
......@@ -32,6 +77,16 @@ struct mei_nfc_hdr {
u16 data_size;
} __packed;
#define MEI_NFC_CMD_MAINTENANCE 0x00
#define MEI_NFC_CMD_HCI_SEND 0x01
#define MEI_NFC_CMD_HCI_RECV 0x02
#define MEI_NFC_SUBCMD_CONNECT 0x00
#define MEI_NFC_SUBCMD_IF_VERSION 0x01
#define MEI_NFC_HEADER_SIZE 10
#define MEI_NFC_MAX_READ (MEI_NFC_HEADER_SIZE + MEI_NFC_MAX_HCI_PAYLOAD)
#define MEI_DUMP_SKB_IN(info, skb) \
......@@ -48,48 +103,153 @@ do { \
16, 1, (skb)->data, (skb)->len, false); \
} while (0)
int nfc_mei_phy_enable(void *phy_id)
static int mei_nfc_if_version(struct nfc_mei_phy *phy)
{
int r;
struct nfc_mei_phy *phy = phy_id;
struct mei_nfc_cmd cmd;
struct mei_nfc_reply *reply = NULL;
struct mei_nfc_if_version *version;
size_t if_version_length;
int bytes_recv, r;
pr_info("%s\n", __func__);
if (phy->powered == 1)
return 0;
memset(&cmd, 0, sizeof(struct mei_nfc_cmd));
cmd.command = MEI_NFC_CMD_MAINTENANCE;
cmd.data_size = 1;
cmd.sub_command = MEI_NFC_SUBCMD_IF_VERSION;
r = mei_cl_enable_device(phy->device);
r = mei_cl_send(phy->device, (u8 *)&cmd, sizeof(struct mei_nfc_cmd));
if (r < 0) {
pr_err("Could not enable device\n");
pr_err("Could not send IF version cmd\n");
return r;
}
r = mei_cl_register_event_cb(phy->device, nfc_mei_event_cb, phy);
if (r) {
pr_err("Event cb registration failed\n");
mei_cl_disable_device(phy->device);
phy->powered = 0;
/* to be sure on the stack we alloc memory */
if_version_length = sizeof(struct mei_nfc_reply) +
sizeof(struct mei_nfc_if_version);
return r;
reply = kzalloc(if_version_length, GFP_KERNEL);
if (!reply)
return -ENOMEM;
bytes_recv = mei_cl_recv(phy->device, (u8 *)reply, if_version_length);
if (bytes_recv < 0 || bytes_recv < sizeof(struct mei_nfc_reply)) {
pr_err("Could not read IF version\n");
r = -EIO;
goto err;
}
phy->powered = 1;
version = (struct mei_nfc_if_version *)reply->data;
return 0;
phy->fw_ivn = version->fw_ivn;
phy->vendor_id = version->vendor_id;
phy->radio_type = version->radio_type;
err:
kfree(reply);
return r;
}
EXPORT_SYMBOL_GPL(nfc_mei_phy_enable);
void nfc_mei_phy_disable(void *phy_id)
static int mei_nfc_connect(struct nfc_mei_phy *phy)
{
struct nfc_mei_phy *phy = phy_id;
struct mei_nfc_cmd *cmd, *reply;
struct mei_nfc_connect *connect;
struct mei_nfc_connect_resp *connect_resp;
size_t connect_length, connect_resp_length;
int bytes_recv, r;
pr_info("%s\n", __func__);
mei_cl_disable_device(phy->device);
connect_length = sizeof(struct mei_nfc_cmd) +
sizeof(struct mei_nfc_connect);
phy->powered = 0;
connect_resp_length = sizeof(struct mei_nfc_cmd) +
sizeof(struct mei_nfc_connect_resp);
cmd = kzalloc(connect_length, GFP_KERNEL);
if (!cmd)
return -ENOMEM;
connect = (struct mei_nfc_connect *)cmd->data;
reply = kzalloc(connect_resp_length, GFP_KERNEL);
if (!reply) {
kfree(cmd);
return -ENOMEM;
}
connect_resp = (struct mei_nfc_connect_resp *)reply->data;
cmd->command = MEI_NFC_CMD_MAINTENANCE;
cmd->data_size = 3;
cmd->sub_command = MEI_NFC_SUBCMD_CONNECT;
connect->fw_ivn = phy->fw_ivn;
connect->vendor_id = phy->vendor_id;
r = mei_cl_send(phy->device, (u8 *)cmd, connect_length);
if (r < 0) {
pr_err("Could not send connect cmd %d\n", r);
goto err;
}
bytes_recv = mei_cl_recv(phy->device, (u8 *)reply, connect_resp_length);
if (bytes_recv < 0) {
r = bytes_recv;
pr_err("Could not read connect response %d\n", r);
goto err;
}
pr_info("IVN 0x%x Vendor ID 0x%x\n",
connect_resp->fw_ivn, connect_resp->vendor_id);
pr_info("ME FW %d.%d.%d.%d\n",
connect_resp->me_major, connect_resp->me_minor,
connect_resp->me_hotfix, connect_resp->me_build);
r = 0;
err:
kfree(reply);
kfree(cmd);
return r;
}
static int mei_nfc_send(struct nfc_mei_phy *phy, u8 *buf, size_t length)
{
struct mei_nfc_hci_hdr *hdr;
u8 *mei_buf;
int err;
err = -ENOMEM;
mei_buf = kzalloc(length + MEI_NFC_HEADER_SIZE, GFP_KERNEL);
if (!mei_buf)
goto out;
hdr = (struct mei_nfc_hci_hdr *) mei_buf;
hdr->cmd = MEI_NFC_CMD_HCI_SEND;
hdr->status = 0;
hdr->req_id = phy->req_id;
hdr->reserved = 0;
hdr->data_size = length;
memcpy(mei_buf + MEI_NFC_HEADER_SIZE, buf, length);
err = mei_cl_send(phy->device, mei_buf, length + MEI_NFC_HEADER_SIZE);
if (err < 0)
goto out;
if (!wait_event_interruptible_timeout(phy->send_wq,
phy->recv_req_id == phy->req_id, HZ)) {
pr_err("NFC MEI command timeout\n");
err = -ETIME;
} else {
phy->req_id++;
}
out:
kfree(mei_buf);
return err;
}
EXPORT_SYMBOL_GPL(nfc_mei_phy_disable);
/*
* Writing a frame must not return the number of written bytes.
......@@ -103,14 +263,37 @@ static int nfc_mei_phy_write(void *phy_id, struct sk_buff *skb)
MEI_DUMP_SKB_OUT("mei frame sent", skb);
r = mei_cl_send(phy->device, skb->data, skb->len);
r = mei_nfc_send(phy, skb->data, skb->len);
if (r > 0)
r = 0;
return r;
}
void nfc_mei_event_cb(struct mei_cl_device *device, u32 events, void *context)
static int mei_nfc_recv(struct nfc_mei_phy *phy, u8 *buf, size_t length)
{
struct mei_nfc_hci_hdr *hci_hdr;
int received_length;
received_length = mei_cl_recv(phy->device, buf, length);
if (received_length < 0)
return received_length;
hci_hdr = (struct mei_nfc_hci_hdr *) buf;
if (hci_hdr->cmd == MEI_NFC_CMD_HCI_SEND) {
phy->recv_req_id = hci_hdr->req_id;
wake_up(&phy->send_wq);
return 0;
}
return received_length;
}
static void nfc_mei_event_cb(struct mei_cl_device *device, u32 events,
void *context)
{
struct nfc_mei_phy *phy = context;
......@@ -125,7 +308,7 @@ void nfc_mei_event_cb(struct mei_cl_device *device, u32 events, void *context)
if (!skb)
return;
reply_size = mei_cl_recv(device, skb->data, MEI_NFC_MAX_READ);
reply_size = mei_nfc_recv(phy, skb->data, MEI_NFC_MAX_READ);
if (reply_size < MEI_NFC_HEADER_SIZE) {
kfree_skb(skb);
return;
......@@ -139,7 +322,61 @@ void nfc_mei_event_cb(struct mei_cl_device *device, u32 events, void *context)
nfc_hci_recv_frame(phy->hdev, skb);
}
}
EXPORT_SYMBOL_GPL(nfc_mei_event_cb);
static int nfc_mei_phy_enable(void *phy_id)
{
int r;
struct nfc_mei_phy *phy = phy_id;
pr_info("%s\n", __func__);
if (phy->powered == 1)
return 0;
r = mei_cl_enable_device(phy->device);
if (r < 0) {
pr_err("Could not enable device %d\n", r);
return r;
}
r = mei_nfc_if_version(phy);
if (r < 0) {
pr_err("Could not enable device %d\n", r);
goto err;
}
r = mei_nfc_connect(phy);
if (r < 0) {
pr_err("Could not connect to device %d\n", r);
goto err;
}
r = mei_cl_register_event_cb(phy->device, nfc_mei_event_cb, phy);
if (r) {
pr_err("Event cb registration failed %d\n", r);
goto err;
}
phy->powered = 1;
return 0;
err:
phy->powered = 0;
mei_cl_disable_device(phy->device);
return r;
}
static void nfc_mei_phy_disable(void *phy_id)
{
struct nfc_mei_phy *phy = phy_id;
pr_info("%s\n", __func__);
mei_cl_disable_device(phy->device);
phy->powered = 0;
}
struct nfc_phy_ops mei_phy_ops = {
.write = nfc_mei_phy_write,
......@@ -157,6 +394,7 @@ struct nfc_mei_phy *nfc_mei_phy_alloc(struct mei_cl_device *device)
return NULL;
phy->device = device;
init_waitqueue_head(&phy->send_wq);
mei_cl_set_drvdata(device, phy);
return phy;
......@@ -165,6 +403,7 @@ EXPORT_SYMBOL_GPL(nfc_mei_phy_alloc);
void nfc_mei_phy_free(struct nfc_mei_phy *phy)
{
mei_cl_disable_device(phy->device);
kfree(phy);
}
EXPORT_SYMBOL_GPL(nfc_mei_phy_free);
......
drivers/nfc/mei_phy.h
View file @ be9b720a
......@@ -10,23 +10,42 @@
#define MEI_NFC_HEADER_SIZE 10
#define MEI_NFC_MAX_HCI_PAYLOAD 300
/**
* struct nfc_mei_phy
*
* @device: mei device
* @hdev: nfc hci device
* @send_wq: send completion wait queue
* @fw_ivn: NFC Interface Version Number
* @vendor_id: NFC manufacturer ID
* @radio_type: NFC radio type
* @reserved: reserved for alignment
* @req_id: message counter
* @recv_req_id: reception message counter
* @powered: the device is in powered state
* @hard_fault: < 0 if hardware error occurred
* and prevents normal operation.
*/
struct nfc_mei_phy {
struct mei_cl_device *device;
struct nfc_hci_dev *hdev;
int powered;
wait_queue_head_t send_wq;
u8 fw_ivn;
u8 vendor_id;
u8 radio_type;
u8 reserved;
int hard_fault; /*
* < 0 if hardware error occured
* and prevents normal operation.
*/
u16 req_id;
u16 recv_req_id;
int powered;
int hard_fault;
};
extern struct nfc_phy_ops mei_phy_ops;
int nfc_mei_phy_enable(void *phy_id);
void nfc_mei_phy_disable(void *phy_id);
void nfc_mei_event_cb(struct mei_cl_device *device, u32 events, void *context);
struct nfc_mei_phy *nfc_mei_phy_alloc(struct mei_cl_device *device);
void nfc_mei_phy_free(struct nfc_mei_phy *phy);
......
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