rt2x00: Add rt2800_wait_csr_ready

Similar to rt2800_wait_wpdma_ready() we can add a
function to waiting until the CSR is ready. This
centralizes some additional code into rt2800lib.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 20 insertions, 21 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index 25c44cfd7452..7c68bf35951f 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -255,6 +255,23 @@ void rt2800_mcu_request(struct rt2x00_dev *rt2x00dev,
 }
 EXPORT_SYMBOL_GPL(rt2800_mcu_request);
 
+int rt2800_wait_csr_ready(struct rt2x00_dev *rt2x00dev)
+{
+        unsigned int i = 0;
+        u32 reg;
+
+        for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
+                rt2800_register_read(rt2x00dev, MAC_CSR0, &reg);
+                if (reg && reg != ~0)
+                        return 0;
+                msleep(1);
+        }
+
+        ERROR(rt2x00dev, "Unstable hardware.\n");
+        return -EBUSY;
+}
+EXPORT_SYMBOL_GPL(rt2800_wait_csr_ready);
+
 int rt2800_wait_wpdma_ready(struct rt2x00_dev *rt2x00dev)
 {
         unsigned int i;
@@ -370,17 +387,8 @@ int rt2800_load_firmware(struct rt2x00_dev *rt2x00dev,
         /*
          * Wait for stable hardware.
          */
-        for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
-                rt2800_register_read(rt2x00dev, MAC_CSR0, &reg);
-                if (reg && reg != ~0)
-                        break;
-                msleep(1);
-        }
-
-        if (i == REGISTER_BUSY_COUNT) {
-                ERROR(rt2x00dev, "Unstable hardware.\n");
+        if (rt2800_wait_csr_ready(rt2x00dev))
                 return -EBUSY;
-        }
 
         if (rt2x00_is_pci(rt2x00dev))
                 rt2800_register_write(rt2x00dev, PWR_PIN_CFG, 0x00000002);
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.h b/drivers/net/wireless/rt2x00/rt2800lib.h
index deb10b14157b..986229c06c19 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.h
+++ b/drivers/net/wireless/rt2x00/rt2800lib.h
@@ -140,6 +140,7 @@ void rt2800_mcu_request(struct rt2x00_dev *rt2x00dev,
                         const u8 command, const u8 token,
                         const u8 arg0, const u8 arg1);
 
+int rt2800_wait_csr_ready(struct rt2x00_dev *rt2x00dev);
 int rt2800_wait_wpdma_ready(struct rt2x00_dev *rt2x00dev);
 
 int rt2800_check_firmware(struct rt2x00_dev *rt2x00dev,
diff --git a/drivers/net/wireless/rt2x00/rt2800usb.c b/drivers/net/wireless/rt2x00/rt2800usb.c
index 82ae58e0c5d7..b1a8e943750b 100644
--- a/drivers/net/wireless/rt2x00/rt2800usb.c
+++ b/drivers/net/wireless/rt2x00/rt2800usb.c
@@ -122,22 +122,12 @@ static void rt2800usb_toggle_rx(struct rt2x00_dev *rt2x00dev,
 static int rt2800usb_init_registers(struct rt2x00_dev *rt2x00dev)
 {
         u32 reg;
-        int i;
 
         /*
          * Wait until BBP and RF are ready.
          */
-        for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
-                rt2800_register_read(rt2x00dev, MAC_CSR0, &reg);
-                if (reg && reg != ~0)
-                        break;
-                msleep(1);
-        }
-
-        if (i == REGISTER_BUSY_COUNT) {
-                ERROR(rt2x00dev, "Unstable hardware.\n");
+        if (rt2800_wait_csr_ready(rt2x00dev))
                 return -EBUSY;
-        }
 
         rt2800_register_read(rt2x00dev, PBF_SYS_CTRL, &reg);
         rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, reg & ~0x00002000);