[ 069/127] rt2x00: Fix rfkill polling prior to interface start.

From: Greg Kroah-Hartman
Date: Fri Sep 28 2012 - 17:00:22 EST

3.0-stable review patch. If anyone has any objections, please let me know.

------------------

From: Gertjan van Wingerde <gwingerde@xxxxxxxxx>

commit a396e10019eaf3809b0219c966865aaafec12630 upstream.

We need to program the rfkill switch GPIO pin direction to input at
device initialization time, not only when the interface is brought up.
Doing this only when the interface is brought up could lead to rfkill
detecting the switch is turned on erroneously and inability to create
the interface and bringing it up.

Reported-and-tested-by: Andreas Messer <andi@xxxxxxxxxxxx>
Signed-off-by: Gertjan van Wingerde <gwingerde@xxxxxxxxx>
Acked-by: Ivo Van Doorn <ivdoorn@xxxxxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/net/wireless/rt2x00/rt2400pci.c | 9 +++++++++
drivers/net/wireless/rt2x00/rt2400pci.h | 1 +
drivers/net/wireless/rt2x00/rt2500pci.c | 9 +++++++++
drivers/net/wireless/rt2x00/rt2500usb.c | 9 +++++++++
drivers/net/wireless/rt2x00/rt2500usb.h | 1 +
drivers/net/wireless/rt2x00/rt2800pci.c | 9 +++++++++
drivers/net/wireless/rt2x00/rt2800usb.c | 9 +++++++++
drivers/net/wireless/rt2x00/rt61pci.c | 9 +++++++++
drivers/net/wireless/rt2x00/rt61pci.h | 1 +
drivers/net/wireless/rt2x00/rt73usb.c | 9 +++++++++
drivers/net/wireless/rt2x00/rt73usb.h | 3 +++
11 files changed, 69 insertions(+)

--- a/drivers/net/wireless/rt2x00/rt2400pci.c
+++ b/drivers/net/wireless/rt2x00/rt2400pci.c
@@ -1618,6 +1618,7 @@ static int rt2400pci_probe_hw_mode(struc
static int rt2400pci_probe_hw(struct rt2x00_dev *rt2x00dev)
{
int retval;
+ u32 reg;

/*
* Allocate eeprom data.
@@ -1631,6 +1632,14 @@ static int rt2400pci_probe_hw(struct rt2
return retval;

/*
+ * Enable rfkill polling by setting GPIO direction of the
+ * rfkill switch GPIO pin correctly.
+ */
+ rt2x00pci_register_read(rt2x00dev, GPIOCSR, &reg);
+ rt2x00_set_field32(&reg, GPIOCSR_BIT8, 1);
+ rt2x00pci_register_write(rt2x00dev, GPIOCSR, reg);
+
+ /*
* Initialize hw specifications.
*/
retval = rt2400pci_probe_hw_mode(rt2x00dev);
--- a/drivers/net/wireless/rt2x00/rt2400pci.h
+++ b/drivers/net/wireless/rt2x00/rt2400pci.h
@@ -670,6 +670,7 @@
#define GPIOCSR_BIT5 FIELD32(0x00000020)
#define GPIOCSR_BIT6 FIELD32(0x00000040)
#define GPIOCSR_BIT7 FIELD32(0x00000080)
+#define GPIOCSR_BIT8 FIELD32(0x00000100)

/*
* BBPPCSR: BBP Pin control register.
--- a/drivers/net/wireless/rt2x00/rt2500pci.c
+++ b/drivers/net/wireless/rt2x00/rt2500pci.c
@@ -1936,6 +1936,7 @@ static int rt2500pci_probe_hw_mode(struc
static int rt2500pci_probe_hw(struct rt2x00_dev *rt2x00dev)
{
int retval;
+ u32 reg;

/*
* Allocate eeprom data.
@@ -1949,6 +1950,14 @@ static int rt2500pci_probe_hw(struct rt2
return retval;

/*
+ * Enable rfkill polling by setting GPIO direction of the
+ * rfkill switch GPIO pin correctly.
+ */
+ rt2x00pci_register_read(rt2x00dev, GPIOCSR, &reg);
+ rt2x00_set_field32(&reg, GPIOCSR_DIR0, 1);
+ rt2x00pci_register_write(rt2x00dev, GPIOCSR, reg);
+
+ /*
* Initialize hw specifications.
*/
retval = rt2500pci_probe_hw_mode(rt2x00dev);
--- a/drivers/net/wireless/rt2x00/rt2500usb.c
+++ b/drivers/net/wireless/rt2x00/rt2500usb.c
@@ -1768,6 +1768,7 @@ static int rt2500usb_probe_hw_mode(struc
static int rt2500usb_probe_hw(struct rt2x00_dev *rt2x00dev)
{
int retval;
+ u16 reg;

/*
* Allocate eeprom data.
@@ -1781,6 +1782,14 @@ static int rt2500usb_probe_hw(struct rt2
return retval;

/*
+ * Enable rfkill polling by setting GPIO direction of the
+ * rfkill switch GPIO pin correctly.
+ */
+ rt2500usb_register_read(rt2x00dev, MAC_CSR19, &reg);
+ rt2x00_set_field16(&reg, MAC_CSR19_BIT8, 0);
+ rt2500usb_register_write(rt2x00dev, MAC_CSR19, reg);
+
+ /*
* Initialize hw specifications.
*/
retval = rt2500usb_probe_hw_mode(rt2x00dev);
--- a/drivers/net/wireless/rt2x00/rt2500usb.h
+++ b/drivers/net/wireless/rt2x00/rt2500usb.h
@@ -197,6 +197,7 @@
#define MAC_CSR19_BIT5 FIELD16(0x0020)
#define MAC_CSR19_BIT6 FIELD16(0x0040)
#define MAC_CSR19_BIT7 FIELD16(0x0080)
+#define MAC_CSR19_BIT8 FIELD16(0x0100)

/*
* MAC_CSR20: LED control register.
--- a/drivers/net/wireless/rt2x00/rt2800pci.c
+++ b/drivers/net/wireless/rt2x00/rt2800pci.c
@@ -941,6 +941,7 @@ static int rt2800pci_validate_eeprom(str
static int rt2800pci_probe_hw(struct rt2x00_dev *rt2x00dev)
{
int retval;
+ u32 reg;

/*
* Allocate eeprom data.
@@ -954,6 +955,14 @@ static int rt2800pci_probe_hw(struct rt2
return retval;

/*
+ * Enable rfkill polling by setting GPIO direction of the
+ * rfkill switch GPIO pin correctly.
+ */
+ rt2x00pci_register_read(rt2x00dev, GPIO_CTRL_CFG, &reg);
+ rt2x00_set_field32(&reg, GPIO_CTRL_CFG_GPIOD_BIT2, 1);
+ rt2x00pci_register_write(rt2x00dev, GPIO_CTRL_CFG, reg);
+
+ /*
* Initialize hw specifications.
*/
retval = rt2800_probe_hw_mode(rt2x00dev);
--- a/drivers/net/wireless/rt2x00/rt2800usb.c
+++ b/drivers/net/wireless/rt2x00/rt2800usb.c
@@ -600,6 +600,7 @@ static int rt2800usb_validate_eeprom(str
static int rt2800usb_probe_hw(struct rt2x00_dev *rt2x00dev)
{
int retval;
+ u32 reg;

/*
* Allocate eeprom data.
@@ -613,6 +614,14 @@ static int rt2800usb_probe_hw(struct rt2
return retval;

/*
+ * Enable rfkill polling by setting GPIO direction of the
+ * rfkill switch GPIO pin correctly.
+ */
+ rt2x00usb_register_read(rt2x00dev, GPIO_CTRL_CFG, &reg);
+ rt2x00_set_field32(&reg, GPIO_CTRL_CFG_GPIOD_BIT2, 1);
+ rt2x00usb_register_write(rt2x00dev, GPIO_CTRL_CFG, reg);
+
+ /*
* Initialize hw specifications.
*/
retval = rt2800_probe_hw_mode(rt2x00dev);
--- a/drivers/net/wireless/rt2x00/rt61pci.c
+++ b/drivers/net/wireless/rt2x00/rt61pci.c
@@ -2840,6 +2840,7 @@ static int rt61pci_probe_hw_mode(struct
static int rt61pci_probe_hw(struct rt2x00_dev *rt2x00dev)
{
int retval;
+ u32 reg;

/*
* Disable power saving.
@@ -2858,6 +2859,14 @@ static int rt61pci_probe_hw(struct rt2x0
return retval;

/*
+ * Enable rfkill polling by setting GPIO direction of the
+ * rfkill switch GPIO pin correctly.
+ */
+ rt2x00pci_register_read(rt2x00dev, MAC_CSR13, &reg);
+ rt2x00_set_field32(&reg, MAC_CSR13_BIT13, 1);
+ rt2x00pci_register_write(rt2x00dev, MAC_CSR13, reg);
+
+ /*
* Initialize hw specifications.
*/
retval = rt61pci_probe_hw_mode(rt2x00dev);
--- a/drivers/net/wireless/rt2x00/rt61pci.h
+++ b/drivers/net/wireless/rt2x00/rt61pci.h
@@ -372,6 +372,7 @@ struct hw_pairwise_ta_entry {
#define MAC_CSR13_BIT10 FIELD32(0x00000400)
#define MAC_CSR13_BIT11 FIELD32(0x00000800)
#define MAC_CSR13_BIT12 FIELD32(0x00001000)
+#define MAC_CSR13_BIT13 FIELD32(0x00002000)

/*
* MAC_CSR14: LED control register.
--- a/drivers/net/wireless/rt2x00/rt73usb.c
+++ b/drivers/net/wireless/rt2x00/rt73usb.c
@@ -2177,6 +2177,7 @@ static int rt73usb_probe_hw_mode(struct
static int rt73usb_probe_hw(struct rt2x00_dev *rt2x00dev)
{
int retval;
+ u32 reg;

/*
* Allocate eeprom data.
@@ -2190,6 +2191,14 @@ static int rt73usb_probe_hw(struct rt2x0
return retval;

/*
+ * Enable rfkill polling by setting GPIO direction of the
+ * rfkill switch GPIO pin correctly.
+ */
+ rt2x00usb_register_read(rt2x00dev, MAC_CSR13, &reg);
+ rt2x00_set_field32(&reg, MAC_CSR13_BIT15, 0);
+ rt2x00usb_register_write(rt2x00dev, MAC_CSR13, reg);
+
+ /*
* Initialize hw specifications.
*/
retval = rt73usb_probe_hw_mode(rt2x00dev);
--- a/drivers/net/wireless/rt2x00/rt73usb.h
+++ b/drivers/net/wireless/rt2x00/rt73usb.h
@@ -282,6 +282,9 @@ struct hw_pairwise_ta_entry {
#define MAC_CSR13_BIT10 FIELD32(0x00000400)
#define MAC_CSR13_BIT11 FIELD32(0x00000800)
#define MAC_CSR13_BIT12 FIELD32(0x00001000)
+#define MAC_CSR13_BIT13 FIELD32(0x00002000)
+#define MAC_CSR13_BIT14 FIELD32(0x00004000)
+#define MAC_CSR13_BIT15 FIELD32(0x00008000)

/*
* MAC_CSR14: LED control register.


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