Say Y here to compile support for Texas Instrument's NFC WiLink driver
into the kernel or say M to compile it as module.
+config NFC_MEI_PHY
+ tristate "MEI bus NFC device support"
+ depends on INTEL_MEI_BUS_NFC && NFC_HCI
+ help
+ This adds support to use an mei bus nfc device. Select this if you
+ will use an HCI NFC driver for an NFC chip connected behind an
+ Intel's Management Engine chip.
+
+ If unsure, say N.
+
source "drivers/nfc/pn544/Kconfig"
source "drivers/nfc/microread/Kconfig"
obj-$(CONFIG_NFC_MICROREAD) += microread/
obj-$(CONFIG_NFC_PN533) += pn533.o
obj-$(CONFIG_NFC_WILINK) += nfcwilink.o
+obj-$(CONFIG_NFC_MEI_PHY) += mei_phy.o
ccflags-$(CONFIG_NFC_DEBUG) := -DDEBUG
--- /dev/null
+/*
+ * MEI Library for mei bus nfc device access
+ *
+ * Copyright (C) 2013 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions 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/module.h>
+#include <linux/slab.h>
+#include <linux/nfc.h>
+
+#include "mei_phy.h"
+
+struct mei_nfc_hdr {
+ u8 cmd;
+ u8 status;
+ u16 req_id;
+ u32 reserved;
+ u16 data_size;
+} __attribute__((packed));
+
+#define MEI_NFC_MAX_READ (MEI_NFC_HEADER_SIZE + MEI_NFC_MAX_HCI_PAYLOAD)
+
+#define MEI_DUMP_SKB_IN(info, skb) \
+do { \
+ pr_debug("%s:\n", info); \
+ print_hex_dump_debug("mei in : ", DUMP_PREFIX_OFFSET, \
+ 16, 1, (skb)->data, (skb)->len, false); \
+} while (0)
+
+#define MEI_DUMP_SKB_OUT(info, skb) \
+do { \
+ pr_debug("%s:\n", info); \
+ print_hex_dump_debug("mei out: ", DUMP_PREFIX_OFFSET, \
+ 16, 1, (skb)->data, (skb)->len, false); \
+} while (0)
+
+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("MEI_PHY: Could not enable device\n");
+ return r;
+ }
+
+ phy->powered = 1;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(nfc_mei_phy_enable);
+
+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;
+}
+EXPORT_SYMBOL_GPL(nfc_mei_phy_disable);
+
+/*
+ * Writing a frame must not return the number of written bytes.
+ * It must return either zero for success, or <0 for error.
+ * In addition, it must not alter the skb
+ */
+static int nfc_mei_phy_write(void *phy_id, struct sk_buff *skb)
+{
+ struct nfc_mei_phy *phy = phy_id;
+ int r;
+
+ MEI_DUMP_SKB_OUT("mei frame sent", skb);
+
+ r = mei_cl_send(phy->device, 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)
+{
+ struct nfc_mei_phy *phy = context;
+
+ if (phy->hard_fault != 0)
+ return;
+
+ if (events & BIT(MEI_CL_EVENT_RX)) {
+ struct sk_buff *skb;
+ int reply_size;
+
+ skb = alloc_skb(MEI_NFC_MAX_READ, GFP_KERNEL);
+ if (!skb)
+ return;
+
+ reply_size = mei_cl_recv(device, skb->data, MEI_NFC_MAX_READ);
+ if (reply_size < MEI_NFC_HEADER_SIZE) {
+ kfree(skb);
+ return;
+ }
+
+ skb_put(skb, reply_size);
+ skb_pull(skb, MEI_NFC_HEADER_SIZE);
+
+ MEI_DUMP_SKB_IN("mei frame read", skb);
+
+ nfc_hci_recv_frame(phy->hdev, skb);
+ }
+}
+EXPORT_SYMBOL_GPL(nfc_mei_event_cb);
+
+struct nfc_phy_ops mei_phy_ops = {
+ .write = nfc_mei_phy_write,
+ .enable = nfc_mei_phy_enable,
+ .disable = nfc_mei_phy_disable,
+};
+EXPORT_SYMBOL_GPL(mei_phy_ops);
+
+struct nfc_mei_phy *nfc_mei_phy_alloc(struct mei_cl_device *device)
+{
+ struct nfc_mei_phy *phy;
+
+ phy = kzalloc(sizeof(struct nfc_mei_phy), GFP_KERNEL);
+ if (!phy)
+ return NULL;
+
+ phy->device = device;
+ mei_cl_set_drvdata(device, phy);
+
+ return phy;
+}
+EXPORT_SYMBOL_GPL(nfc_mei_phy_alloc);
+
+void nfc_mei_phy_free(struct nfc_mei_phy *phy)
+{
+ kfree(phy);
+}
+EXPORT_SYMBOL_GPL(nfc_mei_phy_free);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("mei bus NFC device interface");
--- /dev/null
+#ifndef __LOCAL_MEI_PHY_H_
+#define __LOCAL_MEI_PHY_H_
+
+#include <linux/mei_cl_bus.h>
+#include <net/nfc/hci.h>
+
+#define MEI_NFC_HEADER_SIZE 10
+#define MEI_NFC_MAX_HCI_PAYLOAD 300
+
+struct nfc_mei_phy {
+ struct mei_cl_device *device;
+ struct nfc_hci_dev *hdev;
+
+ int powered;
+
+ int hard_fault; /*
+ * < 0 if hardware error occured
+ * and prevents normal operation.
+ */
+};
+
+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);
+
+#endif /* __LOCAL_MEI_PHY_H_ */
config NFC_MICROREAD_MEI
tristate "NFC Microread MEI support"
- depends on NFC_MICROREAD && INTEL_MEI_BUS_NFC
+ depends on NFC_MICROREAD && NFC_MEI_PHY
---help---
This module adds support for the mei interface of adapters using
Inside microread chipsets. Select this if your microread chipset
*/
#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/gpio.h>
-#include <linux/mei_cl_bus.h>
-
+#include <linux/mod_devicetable.h>
#include <linux/nfc.h>
#include <net/nfc/hci.h>
#include <net/nfc/llc.h>
+#include "../mei_phy.h"
#include "microread.h"
#define MICROREAD_DRIVER_NAME "microread"
-struct mei_nfc_hdr {
- u8 cmd;
- u8 status;
- u16 req_id;
- u32 reserved;
- u16 data_size;
-} __attribute__((packed));
-
-#define MEI_NFC_HEADER_SIZE 10
-#define MEI_NFC_MAX_HCI_PAYLOAD 300
-#define MEI_NFC_MAX_READ (MEI_NFC_HEADER_SIZE + MEI_NFC_MAX_HCI_PAYLOAD)
-
-struct microread_mei_phy {
- struct mei_cl_device *device;
- struct nfc_hci_dev *hdev;
-
- int powered;
-
- int hard_fault; /*
- * < 0 if hardware error occured (e.g. i2c err)
- * and prevents normal operation.
- */
-};
-
-#define MEI_DUMP_SKB_IN(info, skb) \
-do { \
- pr_debug("%s:\n", info); \
- print_hex_dump(KERN_DEBUG, "mei in : ", DUMP_PREFIX_OFFSET, \
- 16, 1, (skb)->data, (skb)->len, 0); \
-} while (0)
-
-#define MEI_DUMP_SKB_OUT(info, skb) \
-do { \
- pr_debug("%s:\n", info); \
- print_hex_dump(KERN_DEBUG, "mei out: ", DUMP_PREFIX_OFFSET, \
- 16, 1, (skb)->data, (skb)->len, 0); \
-} while (0)
-
-static int microread_mei_enable(void *phy_id)
-{
- struct microread_mei_phy *phy = phy_id;
-
- pr_info(DRIVER_DESC ": %s\n", __func__);
-
- phy->powered = 1;
-
- return 0;
-}
-
-static void microread_mei_disable(void *phy_id)
-{
- struct microread_mei_phy *phy = phy_id;
-
- pr_info(DRIVER_DESC ": %s\n", __func__);
-
- phy->powered = 0;
-}
-
-/*
- * Writing a frame must not return the number of written bytes.
- * It must return either zero for success, or <0 for error.
- * In addition, it must not alter the skb
- */
-static int microread_mei_write(void *phy_id, struct sk_buff *skb)
-{
- struct microread_mei_phy *phy = phy_id;
- int r;
-
- MEI_DUMP_SKB_OUT("mei frame sent", skb);
-
- r = mei_cl_send(phy->device, skb->data, skb->len);
- if (r > 0)
- r = 0;
-
- return r;
-}
-
-static void microread_event_cb(struct mei_cl_device *device, u32 events,
- void *context)
-{
- struct microread_mei_phy *phy = context;
-
- if (phy->hard_fault != 0)
- return;
-
- if (events & BIT(MEI_CL_EVENT_RX)) {
- struct sk_buff *skb;
- int reply_size;
-
- skb = alloc_skb(MEI_NFC_MAX_READ, GFP_KERNEL);
- if (!skb)
- return;
-
- reply_size = mei_cl_recv(device, skb->data, MEI_NFC_MAX_READ);
- if (reply_size < MEI_NFC_HEADER_SIZE) {
- kfree(skb);
- return;
- }
-
- skb_put(skb, reply_size);
- skb_pull(skb, MEI_NFC_HEADER_SIZE);
-
- MEI_DUMP_SKB_IN("mei frame read", skb);
-
- nfc_hci_recv_frame(phy->hdev, skb);
- }
-}
-
-static struct nfc_phy_ops mei_phy_ops = {
- .write = microread_mei_write,
- .enable = microread_mei_enable,
- .disable = microread_mei_disable,
-};
-
static int microread_mei_probe(struct mei_cl_device *device,
const struct mei_cl_device_id *id)
{
- struct microread_mei_phy *phy;
+ struct nfc_mei_phy *phy;
int r;
pr_info("Probing NFC microread\n");
- phy = kzalloc(sizeof(struct microread_mei_phy), GFP_KERNEL);
+ phy = nfc_mei_phy_alloc(device);
if (!phy) {
pr_err("Cannot allocate memory for microread mei phy.\n");
return -ENOMEM;
}
- phy->device = device;
- mei_cl_set_drvdata(device, phy);
-
- r = mei_cl_register_event_cb(device, microread_event_cb, phy);
+ r = mei_cl_register_event_cb(device, nfc_mei_event_cb, phy);
if (r) {
pr_err(MICROREAD_DRIVER_NAME ": event cb registration failed\n");
goto err_out;
return 0;
err_out:
- kfree(phy);
+ nfc_mei_phy_free(phy);
return r;
}
static int microread_mei_remove(struct mei_cl_device *device)
{
- struct microread_mei_phy *phy = mei_cl_get_drvdata(device);
+ struct nfc_mei_phy *phy = mei_cl_get_drvdata(device);
pr_info("Removing microread\n");
microread_remove(phy->hdev);
- if (phy->powered)
- microread_mei_disable(phy);
+ nfc_mei_phy_disable(phy);
- kfree(phy);
+ nfc_mei_phy_free(phy);
return 0;
}
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