ar71xx: add an external reset callback for ar913x and use it in ath9k

should reduce the frequency of DMA stop failures

Backport of r36530

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@36664 3c298f89-4303-0410-b956-a3cf2f4a3e73

9 files changed, 67 insertions, 8 deletions

diff --git a/package/mac80211/patches/556-ath9k_ar913x_external_reset.patch b/package/mac80211/patches/556-ath9k_ar913x_external_reset.patch
new file mode 100644
index 0000000000..c95f391478
--- /dev/null
+++ b/package/mac80211/patches/556-ath9k_ar913x_external_reset.patch
@@ -0,0 +1,28 @@
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -1374,7 +1374,10 @@ static bool ath9k_hw_set_reset(struct at
+ 
+ 	REGWRITE_BUFFER_FLUSH(ah);
+ 
+-	udelay(50);
++	if (AR_SREV_9100(ah))
++		mdelay(10);
++	else
++		udelay(50);
+ 
+ 	REG_WRITE(ah, AR_RTC_RC, 0);
+ 	if (!ath9k_hw_wait(ah, AR_RTC_RC, AR_RTC_RC_M, 0, AH_WAIT_TIMEOUT)) {
+@@ -1385,8 +1388,12 @@ static bool ath9k_hw_set_reset(struct at
+ 	if (!AR_SREV_9100(ah))
+ 		REG_WRITE(ah, AR_RC, 0);
+ 
+-	if (AR_SREV_9100(ah))
++	if (AR_SREV_9100(ah) && type != ATH9K_RESET_WARM) {
++		if (ah->external_reset)
++			ah->external_reset();
++
+ 		udelay(50);
++	}
+ 
+ 	return true;
+ }
diff --git a/target/linux/ar71xx/patches-3.3/480-ar913x_wmac_external_reset.patch b/target/linux/ar71xx/patches-3.3/480-ar913x_wmac_external_reset.patch
new file mode 100644
index 0000000000..376652a3d9
--- /dev/null
+++ b/target/linux/ar71xx/patches-3.3/480-ar913x_wmac_external_reset.patch
@@ -0,0 +1,31 @@
+--- a/arch/mips/ath79/dev-wmac.c
++++ b/arch/mips/ath79/dev-wmac.c
+@@ -44,7 +44,7 @@ static struct platform_device ath79_wmac
+ 	},
+ };
+ 
+-static void __init ar913x_wmac_setup(void)
++static int ar913x_wmac_reset(void)
+ {
+ 	/* reset the WMAC */
+ 	ath79_device_reset_set(AR913X_RESET_AMBA2WMAC);
+@@ -53,10 +53,19 @@ static void __init ar913x_wmac_setup(voi
+ 	ath79_device_reset_clear(AR913X_RESET_AMBA2WMAC);
+ 	mdelay(10);
+ 
++	return 0;
++}
++
++static void __init ar913x_wmac_setup(void)
++{
++	ar913x_wmac_reset();
++
+ 	ath79_wmac_resources[0].start = AR913X_WMAC_BASE;
+ 	ath79_wmac_resources[0].end = AR913X_WMAC_BASE + AR913X_WMAC_SIZE - 1;
+ 	ath79_wmac_resources[1].start = ATH79_CPU_IRQ_IP2;
+ 	ath79_wmac_resources[1].end = ATH79_CPU_IRQ_IP2;
++
++	ath79_wmac_data.external_reset = ar913x_wmac_reset;
+ }
+ 
+ 
diff --git a/target/linux/ar71xx/patches-3.3/501-MIPS-ath79-add-mac-argument-to-ath79_register_wmac.patch b/target/linux/ar71xx/patches-3.3/501-MIPS-ath79-add-mac-argument-to-ath79_register_wmac.patch
index bab4f701d1..d22b73a0f4 100644
--- a/target/linux/ar71xx/patches-3.3/501-MIPS-ath79-add-mac-argument-to-ath79_register_wmac.patch
+++ b/target/linux/ar71xx/patches-3.3/501-MIPS-ath79-add-mac-argument-to-ath79_register_wmac.patch
@@ -16,7 +16,7 @@
  static struct ath9k_platform_data ath79_wmac_data;
  
  static struct resource ath79_wmac_resources[] = {
-@@ -134,7 +136,7 @@ static void qca955x_wmac_setup(void)
+@@ -143,7 +145,7 @@ static void qca955x_wmac_setup(void)
  		ath79_wmac_data.is_clk_25mhz = true;
  }
  
@@ -25,7 +25,7 @@
  {
  	if (soc_is_ar913x())
  		ar913x_wmac_setup();
-@@ -151,5 +153,10 @@ void __init ath79_register_wmac(u8 *cal_
+@@ -160,5 +162,10 @@ void __init ath79_register_wmac(u8 *cal_
  		memcpy(ath79_wmac_data.eeprom_data, cal_data,
  		       sizeof(ath79_wmac_data.eeprom_data));
  
diff --git a/target/linux/ar71xx/patches-3.3/505-MIPS-ath79-add-ath79_gpio_function_select.patch b/target/linux/ar71xx/patches-3.3/505-MIPS-ath79-add-ath79_gpio_function_select.patch
index 86e136f67e..08f4a1e95c 100644
--- a/target/linux/ar71xx/patches-3.3/505-MIPS-ath79-add-ath79_gpio_function_select.patch
+++ b/target/linux/ar71xx/patches-3.3/505-MIPS-ath79-add-ath79_gpio_function_select.patch
@@ -10,7 +10,7 @@
  #endif /* __ATH79_COMMON_H */
 --- a/arch/mips/ath79/gpio.c
 +++ b/arch/mips/ath79/gpio.c
-@@ -198,6 +198,34 @@ void ath79_gpio_function_setup(u32 set,
+@@ -198,6 +198,34 @@ void ath79_gpio_function_setup(u32 set, 
  	spin_unlock_irqrestore(&ath79_gpio_lock, flags);
  }
  
diff --git a/target/linux/ar71xx/patches-3.3/521-MIPS-ath79-enable-UART-for-early_serial.patch b/target/linux/ar71xx/patches-3.3/521-MIPS-ath79-enable-UART-for-early_serial.patch
index 489bc96738..2ee025bbf2 100644
--- a/target/linux/ar71xx/patches-3.3/521-MIPS-ath79-enable-UART-for-early_serial.patch
+++ b/target/linux/ar71xx/patches-3.3/521-MIPS-ath79-enable-UART-for-early_serial.patch
@@ -1,6 +1,6 @@
 --- a/arch/mips/ath79/early_printk.c
 +++ b/arch/mips/ath79/early_printk.c
-@@ -56,6 +56,46 @@ static void prom_putchar_dummy(unsigned
+@@ -56,6 +56,46 @@ static void prom_putchar_dummy(unsigned 
  	/* nothing to do */
  }
  
diff --git a/target/linux/ar71xx/patches-3.3/606-MIPS-ath79-pb44-fixes.patch b/target/linux/ar71xx/patches-3.3/606-MIPS-ath79-pb44-fixes.patch
index f9ec7753f1..b38b46121d 100644
--- a/target/linux/ar71xx/patches-3.3/606-MIPS-ath79-pb44-fixes.patch
+++ b/target/linux/ar71xx/patches-3.3/606-MIPS-ath79-pb44-fixes.patch
@@ -50,7 +50,7 @@
  #define PB44_GPIO_SW_RESET	(PB44_GPIO_EXP_BASE + 6)
  #define PB44_GPIO_SW_JUMP	(PB44_GPIO_EXP_BASE + 8)
  #define PB44_GPIO_LED_JUMP1	(PB44_GPIO_EXP_BASE + 9)
-@@ -92,21 +117,66 @@ static struct ath79_spi_controller_data
+@@ -92,21 +117,66 @@ static struct ath79_spi_controller_data 
  	.cs_line = 0,
  };
  
diff --git a/target/linux/ar71xx/patches-3.3/620-MIPS-ath79-OTP-support.patch b/target/linux/ar71xx/patches-3.3/620-MIPS-ath79-OTP-support.patch
index 087dbc0829..f52961a039 100644
--- a/target/linux/ar71xx/patches-3.3/620-MIPS-ath79-OTP-support.patch
+++ b/target/linux/ar71xx/patches-3.3/620-MIPS-ath79-OTP-support.patch
@@ -1,6 +1,6 @@
 --- a/arch/mips/ath79/dev-wmac.c
 +++ b/arch/mips/ath79/dev-wmac.c
-@@ -139,6 +139,137 @@ static void qca955x_wmac_setup(void)
+@@ -148,6 +148,137 @@ static void qca955x_wmac_setup(void)
  		ath79_wmac_data.is_clk_25mhz = true;
  }
  
diff --git a/target/linux/ar71xx/patches-3.3/621-MIPS-ath79-add-ath79_wmac_disable_25ghz-helpers.patch b/target/linux/ar71xx/patches-3.3/621-MIPS-ath79-add-ath79_wmac_disable_25ghz-helpers.patch
index ca5900b17e..957ccb6308 100644
--- a/target/linux/ar71xx/patches-3.3/621-MIPS-ath79-add-ath79_wmac_disable_25ghz-helpers.patch
+++ b/target/linux/ar71xx/patches-3.3/621-MIPS-ath79-add-ath79_wmac_disable_25ghz-helpers.patch
@@ -1,6 +1,6 @@
 --- a/arch/mips/ath79/dev-wmac.c
 +++ b/arch/mips/ath79/dev-wmac.c
-@@ -270,6 +270,16 @@ bool __init ar93xx_wmac_read_mac_address
+@@ -279,6 +279,16 @@ bool __init ar93xx_wmac_read_mac_address
  	return ret;
  }
  
diff --git a/target/linux/ar71xx/patches-3.3/650-MIPS-ath79-fix-ar933x-reset.patch b/target/linux/ar71xx/patches-3.3/650-MIPS-ath79-fix-ar933x-reset.patch
index a81d6ea6e0..d288f080a6 100644
--- a/target/linux/ar71xx/patches-3.3/650-MIPS-ath79-fix-ar933x-reset.patch
+++ b/target/linux/ar71xx/patches-3.3/650-MIPS-ath79-fix-ar933x-reset.patch
@@ -1,6 +1,6 @@
 --- a/arch/mips/ath79/dev-wmac.c
 +++ b/arch/mips/ath79/dev-wmac.c
-@@ -67,10 +67,27 @@ static void __init ar913x_wmac_setup(voi
+@@ -76,10 +76,27 @@ static void __init ar913x_wmac_setup(voi
  
  static int ar933x_wmac_reset(void)
  {