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-rw-r--r--drivers/nfc/mei_phy.c295
-rw-r--r--drivers/nfc/mei_phy.h38
-rw-r--r--drivers/nfc/microread/mei.c2
-rw-r--r--drivers/nfc/pn544/mei.c2
4 files changed, 301 insertions, 36 deletions
diff --git a/drivers/nfc/mei_phy.c b/drivers/nfc/mei_phy.c
index 11c7cbdade66..2b77ccf77f81 100644
--- a/drivers/nfc/mei_phy.c
+++ b/drivers/nfc/mei_phy.c
@@ -32,6 +32,51 @@ struct mei_nfc_hdr {
u16 data_size;
} __packed;
+struct mei_nfc_cmd {
+ struct mei_nfc_hdr hdr;
+ u8 sub_command;
+ u8 data[];
+} __packed;
+
+struct mei_nfc_reply {
+ struct mei_nfc_hdr hdr;
+ 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;
+
+
+#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_MAX_READ (MEI_NFC_HEADER_SIZE + MEI_NFC_MAX_HCI_PAYLOAD)
#define MEI_DUMP_SKB_IN(info, skb) \
@@ -45,51 +90,169 @@ do { \
do { \
pr_debug("%s:\n", info); \
print_hex_dump_debug("mei out: ", DUMP_PREFIX_OFFSET, \
- 16, 1, (skb)->data, (skb)->len, false); \
+ 16, 1, (skb)->data, (skb)->len, false); \
} while (0)
-int nfc_mei_phy_enable(void *phy_id)
+#define MEI_DUMP_NFC_HDR(info, _hdr) \
+do { \
+ pr_debug("%s:\n", info); \
+ pr_debug("cmd=%02d status=%d req_id=%d rsvd=%d size=%d\n", \
+ (_hdr)->cmd, (_hdr)->status, (_hdr)->req_id, \
+ (_hdr)->reserved, (_hdr)->data_size); \
+} while (0)
+
+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.hdr.cmd = MEI_NFC_CMD_MAINTENANCE;
+ cmd.hdr.data_size = 1;
+ cmd.sub_command = MEI_NFC_SUBCMD_IF_VERSION;
- r = mei_cl_enable_device(phy->device);
+ MEI_DUMP_NFC_HDR("version", &cmd.hdr);
+ 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->hdr.cmd = MEI_NFC_CMD_MAINTENANCE;
+ cmd->hdr.data_size = 3;
+ cmd->sub_command = MEI_NFC_SUBCMD_CONNECT;
+ connect->fw_ivn = phy->fw_ivn;
+ connect->vendor_id = phy->vendor_id;
+
+ MEI_DUMP_NFC_HDR("connect request", &cmd->hdr);
+ 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;
+ }
+
+ MEI_DUMP_NFC_HDR("connect reply", &reply->hdr);
+
+ 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_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_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;
+
+ MEI_DUMP_NFC_HDR("send", hdr);
+
+ 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 +266,38 @@ 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_hdr *hdr;
+ int received_length;
+
+ received_length = mei_cl_recv(phy->device, buf, length);
+ if (received_length < 0)
+ return received_length;
+
+ hdr = (struct mei_nfc_hdr *) buf;
+
+ MEI_DUMP_NFC_HDR("receive", hdr);
+ if (hdr->cmd == MEI_NFC_CMD_HCI_SEND) {
+ phy->recv_req_id = 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 +312,7 @@ 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 +326,61 @@ 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 +398,7 @@ 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 +407,7 @@ 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);
diff --git a/drivers/nfc/mei_phy.h b/drivers/nfc/mei_phy.h
index d669900f8278..fbfa3e61738f 100644
--- a/drivers/nfc/mei_phy.h
+++ b/drivers/nfc/mei_phy.h
@@ -3,27 +3,49 @@
#include <linux/mei_cl_bus.h>
#include <net/nfc/hci.h>
+#include <linux/uuid.h>
+#define MEI_NFC_UUID UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50, \
+ 0x94, 0xd4, 0x50, 0x26, 0x67, 0x23, 0x77, 0x5c)
#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;
+
+ u16 req_id;
+ u16 recv_req_id;
- int hard_fault; /*
- * < 0 if hardware error occured
- * and prevents normal operation.
- */
+ 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);
diff --git a/drivers/nfc/microread/mei.c b/drivers/nfc/microread/mei.c
index 2d1395be64ae..f9f5fc97cdd7 100644
--- a/drivers/nfc/microread/mei.c
+++ b/drivers/nfc/microread/mei.c
@@ -67,7 +67,7 @@ static int microread_mei_remove(struct mei_cl_device *device)
}
static struct mei_cl_device_id microread_mei_tbl[] = {
- { MICROREAD_DRIVER_NAME },
+ { MICROREAD_DRIVER_NAME, MEI_NFC_UUID},
/* required last entry */
{ }
diff --git a/drivers/nfc/pn544/mei.c b/drivers/nfc/pn544/mei.c
index 330cd4031009..101a37e12efa 100644
--- a/drivers/nfc/pn544/mei.c
+++ b/drivers/nfc/pn544/mei.c
@@ -67,7 +67,7 @@ static int pn544_mei_remove(struct mei_cl_device *device)
}
static struct mei_cl_device_id pn544_mei_tbl[] = {
- { PN544_DRIVER_NAME },
+ { PN544_DRIVER_NAME, MEI_NFC_UUID},
/* required last entry */
{ }
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 16:45:52 +0000