ath9k_hw: Offload USB eeprom reading to target

For USB devices, reading the EEPROM data can be offloaded
to the target. Use multiple register reads to take advantage
of this feature to reduce initialization time.

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/eeprom.c b/drivers/net/wireless/ath/ath9k/eeprom.c
index d05163159572..8c18bed3a558 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom.c
@@ -89,6 +89,38 @@ bool ath9k_hw_get_lower_upper_index(u8 target, u8 *pList, u16 listSize,
         return false;
 }
 
+void ath9k_hw_usb_gen_fill_eeprom(struct ath_hw *ah, u16 *eep_data,
+                                  int eep_start_loc, int size)
+{
+        int i = 0, j, addr;
+        u32 addrdata[8];
+        u32 data[8];
+
+        for (addr = 0; addr < size; addr++) {
+                addrdata[i] = AR5416_EEPROM_OFFSET +
+                        ((addr + eep_start_loc) << AR5416_EEPROM_S);
+                i++;
+                if (i == 8) {
+                        REG_READ_MULTI(ah, addrdata, data, i);
+
+                        for (j = 0; j < i; j++) {
+                                *eep_data = data[j];
+                                eep_data++;
+                        }
+                        i = 0;
+                }
+        }
+
+        if (i != 0) {
+                REG_READ_MULTI(ah, addrdata, data, i);
+
+                for (j = 0; j < i; j++) {
+                        *eep_data = data[j];
+                        eep_data++;
+                }
+        }
+}
+
 bool ath9k_hw_nvram_read(struct ath_common *common, u32 off, u16 *data)
 {
         return common->bus_ops->eeprom_read(common, off, data);