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Date: Thu, 7 May 2015 15:54:06 +0300
From: Tomas Winkler <tomas.winkler@...el.com>
To: gregkh@...uxfoundation.org
Cc: arnd@...db.de, linux-kernel@...r.kernel.org,
Tomas Winkler <tomas.winkler@...el.com>,
Samuel Ortiz <sameo@...ux.intel.com>
Subject: [char-misc-next 09/11] NFC: mei_phy: adjust mei nfc header according the spec
1. mei_nfc_hci_hdr and mei_nfc_hdr are just the same thing so drop one
2. use mei_nfc_hdr structure as the member of the command and the reply
instead of replicating all header fields.
3. dump the header for easier debugging
Cc: Samuel Ortiz <sameo@...ux.intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
---
drivers/nfc/mei_phy.c | 58 +++++++++++++++++++++++++++------------------------
1 file changed, 31 insertions(+), 27 deletions(-)
diff --git a/drivers/nfc/mei_phy.c b/drivers/nfc/mei_phy.c
index 7f1495d649bb..2b77ccf77f81 100644
--- a/drivers/nfc/mei_phy.c
+++ b/drivers/nfc/mei_phy.c
@@ -24,22 +24,22 @@
#include "mei_phy.h"
-struct mei_nfc_cmd {
- u8 command;
+struct mei_nfc_hdr {
+ u8 cmd;
u8 status;
u16 req_id;
u32 reserved;
u16 data_size;
+} __packed;
+
+struct mei_nfc_cmd {
+ struct mei_nfc_hdr hdr;
u8 sub_command;
u8 data[];
} __packed;
struct mei_nfc_reply {
- u8 command;
- u8 status;
- u16 req_id;
- u32 reserved;
- u16 data_size;
+ struct mei_nfc_hdr hdr;
u8 sub_command;
u8 reply_status;
u8 data[];
@@ -69,13 +69,6 @@ struct mei_nfc_connect_resp {
u16 me_build;
} __packed;
-struct mei_nfc_hci_hdr {
- u8 cmd;
- u8 status;
- u16 req_id;
- u32 reserved;
- u16 data_size;
-} __packed;
#define MEI_NFC_CMD_MAINTENANCE 0x00
#define MEI_NFC_CMD_HCI_SEND 0x01
@@ -84,9 +77,6 @@ struct mei_nfc_hci_hdr {
#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) \
@@ -103,6 +93,13 @@ do { \
16, 1, (skb)->data, (skb)->len, false); \
} while (0)
+#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)
{
@@ -116,10 +113,11 @@ static int mei_nfc_if_version(struct nfc_mei_phy *phy)
pr_info("%s\n", __func__);
memset(&cmd, 0, sizeof(struct mei_nfc_cmd));
- cmd.command = MEI_NFC_CMD_MAINTENANCE;
- cmd.data_size = 1;
+ cmd.hdr.cmd = MEI_NFC_CMD_MAINTENANCE;
+ cmd.hdr.data_size = 1;
cmd.sub_command = MEI_NFC_SUBCMD_IF_VERSION;
+ 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 send IF version cmd\n");
@@ -181,12 +179,13 @@ static int mei_nfc_connect(struct nfc_mei_phy *phy)
connect_resp = (struct mei_nfc_connect_resp *)reply->data;
- cmd->command = MEI_NFC_CMD_MAINTENANCE;
- cmd->data_size = 3;
+ 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);
@@ -200,6 +199,8 @@ static int mei_nfc_connect(struct nfc_mei_phy *phy)
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);
@@ -218,7 +219,7 @@ err:
static int mei_nfc_send(struct nfc_mei_phy *phy, u8 *buf, size_t length)
{
- struct mei_nfc_hci_hdr *hdr;
+ struct mei_nfc_hdr *hdr;
u8 *mei_buf;
int err;
@@ -227,13 +228,15 @@ static int mei_nfc_send(struct nfc_mei_phy *phy, u8 *buf, size_t length)
if (!mei_buf)
goto out;
- hdr = (struct mei_nfc_hci_hdr *) mei_buf;
+ 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)
@@ -272,17 +275,18 @@ static int nfc_mei_phy_write(void *phy_id, struct sk_buff *skb)
static int mei_nfc_recv(struct nfc_mei_phy *phy, u8 *buf, size_t length)
{
- struct mei_nfc_hci_hdr *hci_hdr;
+ struct mei_nfc_hdr *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;
+ hdr = (struct mei_nfc_hdr *) buf;
- if (hci_hdr->cmd == MEI_NFC_CMD_HCI_SEND) {
- phy->recv_req_id = hci_hdr->req_id;
+ 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;
--
2.1.0
--
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