From 1682a861668aee5a1cf0a58007648eb84f138a40 Mon Sep 17 00:00:00 2001
From: Philippe Teuwen <yobibe@gmail.com>
Date: Thu, 31 Jan 2013 01:15:03 +0100
Subject: [PATCH] Add driver-dependent PowerDown

---
 libnfc/drivers/acr122_pcsc.c | 4 +++-
 libnfc/drivers/acr122_usb.c  | 4 +++-
 libnfc/drivers/acr122s.c     | 4 +++-
 libnfc/drivers/arygon.c      | 4 +++-
 libnfc/drivers/pn532_uart.c  | 3 ++-
 libnfc/drivers/pn53x_usb.c   | 3 ++-
 libnfc/nfc-internal.h        | 1 +
 7 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/libnfc/drivers/acr122_pcsc.c b/libnfc/drivers/acr122_pcsc.c
index a0f6629..b87cd2b 100644
--- a/libnfc/drivers/acr122_pcsc.c
+++ b/libnfc/drivers/acr122_pcsc.c
@@ -516,6 +516,8 @@ const struct nfc_driver acr122_pcsc_driver = {
   .device_get_information_about = pn53x_get_information_about,
 
   .abort_command  = NULL,  // Abort is not supported in this driver
-  .idle  = NULL,           // Idle is not supported in this driver
+  .idle           = pn53x_idle,
+  /* Even if PN532, PowerDown is not recommended on those devices */
+  .powerdown      = NULL,
 };
 
diff --git a/libnfc/drivers/acr122_usb.c b/libnfc/drivers/acr122_usb.c
index 020a6b9..533a3ed 100644
--- a/libnfc/drivers/acr122_usb.c
+++ b/libnfc/drivers/acr122_usb.c
@@ -893,5 +893,7 @@ const struct nfc_driver acr122_usb_driver = {
   .device_get_information_about = pn53x_get_information_about,
 
   .abort_command  = acr122_usb_abort_command,
-  .idle  = NULL, // Even with a PN532, PowerDown doesn't seem a good idea here
+  .idle           = pn53x_idle,
+  /* Even if PN532, PowerDown is not recommended on those devices */
+  .powerdown      = NULL,
 };
diff --git a/libnfc/drivers/acr122s.c b/libnfc/drivers/acr122s.c
index a2f4fa3..2c018d2 100644
--- a/libnfc/drivers/acr122s.c
+++ b/libnfc/drivers/acr122s.c
@@ -726,5 +726,7 @@ const struct nfc_driver acr122s_driver = {
   .device_get_information_about = pn53x_get_information_about,
 
   .abort_command  = acr122s_abort_command,
-  .idle  = NULL,
+  .idle           = pn53x_idle,
+  /* Even if PN532, PowerDown is not recommended on those devices */
+  .powerdown      = NULL,
 };
diff --git a/libnfc/drivers/arygon.c b/libnfc/drivers/arygon.c
index 94fcda0..315f36e 100644
--- a/libnfc/drivers/arygon.c
+++ b/libnfc/drivers/arygon.c
@@ -587,6 +587,8 @@ const struct nfc_driver arygon_driver = {
   .device_get_information_about = pn53x_get_information_about,
 
   .abort_command  = arygon_abort_command,
-  .idle  = NULL,  // FIXME arygon driver does not support idle()
+  .idle           = pn53x_idle,
+  /* Even if PN532, PowerDown is not recommended on those devices */
+  .powerdown      = NULL,
 };
 
diff --git a/libnfc/drivers/pn532_uart.c b/libnfc/drivers/pn532_uart.c
index 3c9f2d6..10d71bd 100644
--- a/libnfc/drivers/pn532_uart.c
+++ b/libnfc/drivers/pn532_uart.c
@@ -528,6 +528,7 @@ const struct nfc_driver pn532_uart_driver = {
   .device_get_information_about = pn53x_get_information_about,
 
   .abort_command  = pn532_uart_abort_command,
-  .idle  = pn53x_idle,
+  .idle           = pn53x_idle,
+  .powerdown      = pn53x_PowerDown,
 };
 
diff --git a/libnfc/drivers/pn53x_usb.c b/libnfc/drivers/pn53x_usb.c
index 7440c80..f0580ff 100644
--- a/libnfc/drivers/pn53x_usb.c
+++ b/libnfc/drivers/pn53x_usb.c
@@ -791,5 +791,6 @@ const struct nfc_driver pn53x_usb_driver = {
   .device_get_information_about = pn53x_get_information_about,
 
   .abort_command  = pn53x_usb_abort_command,
-  .idle  = pn53x_idle,
+  .idle           = pn53x_idle,
+  .powerdown      = pn53x_PowerDown,
 };
diff --git a/libnfc/nfc-internal.h b/libnfc/nfc-internal.h
index 5d1ff03..30e4947 100644
--- a/libnfc/nfc-internal.h
+++ b/libnfc/nfc-internal.h
@@ -147,6 +147,7 @@ struct nfc_driver {
 
   int (*abort_command)(struct nfc_device *pnd);
   int (*idle)(struct nfc_device *pnd);
+  int (*powerdown)(struct nfc_device *pnd);
 };
 
 #  define DEVICE_NAME_LENGTH  256