NFC: Changed HCI and PN544 HCI driver to use the new HCI LLC Core

The previous shdlc HCI driver and its header are removed from the tree.
PN544 now registers directly with HCI and passes the name of the llc it
requires (shdlc).
HCI instantiation now allocates the required llc instance. The llc is
started when the HCI device is brought up.

Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

8 files changed, 164 insertions, 1152 deletions

diff --git a/drivers/nfc/Kconfig b/drivers/nfc/Kconfig
index 3b20b73ee649..89c57d1a7cad 100644
--- a/drivers/nfc/Kconfig
+++ b/drivers/nfc/Kconfig
@@ -19,7 +19,7 @@ config PN544_NFC
 
 config PN544_HCI_NFC
         tristate "HCI PN544 NFC driver"
-        depends on I2C && NFC_SHDLC
+        depends on I2C && NFC_HCI && NFC_SHDLC
         select CRC_CCITT
         default n
         ---help---
diff --git a/drivers/nfc/pn544_hci.c b/drivers/nfc/pn544_hci.c
index a176d1f7bbf3..e681da2e3413 100644
--- a/drivers/nfc/pn544_hci.c
+++ b/drivers/nfc/pn544_hci.c
@@ -29,7 +29,7 @@
 
 #include <linux/nfc.h>
 #include <net/nfc/hci.h>
-#include <net/nfc/shdlc.h>
+#include <net/nfc/llc.h>
 
 #include <linux/nfc/pn544.h>
 
@@ -133,7 +133,7 @@ static struct nfc_hci_gate pn544_gates[] = {
 
 struct pn544_hci_info {
         struct i2c_client *i2c_dev;
-        struct nfc_shdlc *shdlc;
+        struct nfc_hci_dev *hdev;
 
         enum pn544_state state;
 
@@ -362,21 +362,21 @@ static irqreturn_t pn544_hci_irq_thread_fn(int irq, void *dev_id)
         if (r == -EREMOTEIO) {
                 info->hard_fault = r;
 
-                nfc_shdlc_recv_frame(info->shdlc, NULL);
+                nfc_hci_recv_frame(info->hdev, NULL);
 
                 return IRQ_HANDLED;
         } else if ((r == -ENOMEM) || (r == -EBADMSG)) {
                 return IRQ_HANDLED;
         }
 
-        nfc_shdlc_recv_frame(info->shdlc, skb);
+        nfc_hci_recv_frame(info->hdev, skb);
 
         return IRQ_HANDLED;
 }
 
-static int pn544_hci_open(struct nfc_shdlc *shdlc)
+static int pn544_hci_open(struct nfc_hci_dev *hdev)
 {
-        struct pn544_hci_info *info = nfc_shdlc_get_clientdata(shdlc);
+        struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
         int r = 0;
 
         mutex_lock(&info->info_lock);
@@ -396,9 +396,9 @@ out:
         return r;
 }
 
-static void pn544_hci_close(struct nfc_shdlc *shdlc)
+static void pn544_hci_close(struct nfc_hci_dev *hdev)
 {
-        struct pn544_hci_info *info = nfc_shdlc_get_clientdata(shdlc);
+        struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
 
         mutex_lock(&info->info_lock);
 
@@ -413,9 +413,8 @@ out:
         mutex_unlock(&info->info_lock);
 }
 
-static int pn544_hci_ready(struct nfc_shdlc *shdlc)
+static int pn544_hci_ready(struct nfc_hci_dev *hdev)
 {
-        struct nfc_hci_dev *hdev = nfc_shdlc_get_hci_dev(shdlc);
         struct sk_buff *skb;
         static struct hw_config {
                 u8 adr[2];
@@ -601,9 +600,9 @@ static void pn544_hci_remove_len_crc(struct sk_buff *skb)
         skb_trim(skb, PN544_FRAME_TAILROOM);
 }
 
-static int pn544_hci_xmit(struct nfc_shdlc *shdlc, struct sk_buff *skb)
+static int pn544_hci_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb)
 {
-        struct pn544_hci_info *info = nfc_shdlc_get_clientdata(shdlc);
+        struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
         struct i2c_client *client = info->i2c_dev;
         int r;
 
@@ -617,10 +616,9 @@ static int pn544_hci_xmit(struct nfc_shdlc *shdlc, struct sk_buff *skb)
         return r;
 }
 
-static int pn544_hci_start_poll(struct nfc_shdlc *shdlc,
+static int pn544_hci_start_poll(struct nfc_hci_dev *hdev,
                                 u32 im_protocols, u32 tm_protocols)
 {
-        struct nfc_hci_dev *hdev = nfc_shdlc_get_hci_dev(shdlc);
         u8 phases = 0;
         int r;
         u8 duration[2];
@@ -671,7 +669,7 @@ static int pn544_hci_start_poll(struct nfc_shdlc *shdlc,
         return r;
 }
 
-static int pn544_hci_target_from_gate(struct nfc_shdlc *shdlc, u8 gate,
+static int pn544_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
                                       struct nfc_target *target)
 {
         switch (gate) {
@@ -689,11 +687,10 @@ static int pn544_hci_target_from_gate(struct nfc_shdlc *shdlc, u8 gate,
         return 0;
 }
 
-static int pn544_hci_complete_target_discovered(struct nfc_shdlc *shdlc,
+static int pn544_hci_complete_target_discovered(struct nfc_hci_dev *hdev,
                                                 u8 gate,
                                                 struct nfc_target *target)
 {
-        struct nfc_hci_dev *hdev = nfc_shdlc_get_hci_dev(shdlc);
         struct sk_buff *uid_skb;
         int r = 0;
 
@@ -765,13 +762,12 @@ static void pn544_hci_data_exchange_cb(void *context, struct sk_buff *skb,
  * <= 0: driver handled the data exchange
  *    1: driver doesn't especially handle, please do standard processing
  */
-static int pn544_hci_data_exchange(struct nfc_shdlc *shdlc,
+static int pn544_hci_data_exchange(struct nfc_hci_dev *hdev,
                                    struct nfc_target *target,
                                    struct sk_buff *skb, data_exchange_cb_t cb,
                                    void *cb_context)
 {
-        struct pn544_hci_info *info = nfc_shdlc_get_clientdata(shdlc);
-        struct nfc_hci_dev *hdev = nfc_shdlc_get_hci_dev(shdlc);
+        struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
 
         pr_info(DRIVER_DESC ": %s for gate=%d\n", __func__,
                 target->hci_reader_gate);
@@ -824,17 +820,15 @@ static int pn544_hci_data_exchange(struct nfc_shdlc *shdlc,
         }
 }
 
-static int pn544_hci_check_presence(struct nfc_shdlc *shdlc,
+static int pn544_hci_check_presence(struct nfc_hci_dev *hdev,