ar71xx: define wmac reset function for QCA955x

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

2 files changed, 85 insertions, 3 deletions

diff --git a/target/linux/ar71xx/patches-4.4/640-MIPS-ath79-add-QCA955x-wmac-reset.patch b/target/linux/ar71xx/patches-4.4/640-MIPS-ath79-add-QCA955x-wmac-reset.patch
new file mode 100644
index 0000000000..8c2e6051cb
--- /dev/null
+++ b/target/linux/ar71xx/patches-4.4/640-MIPS-ath79-add-QCA955x-wmac-reset.patch
@@ -0,0 +1,82 @@
+--- a/arch/mips/ath79/common.c
++++ b/arch/mips/ath79/common.c
+@@ -39,7 +39,7 @@ unsigned int ath79_soc_rev;
+ void __iomem *ath79_pll_base;
+ void __iomem *ath79_reset_base;
+ EXPORT_SYMBOL_GPL(ath79_reset_base);
+-static void __iomem *ath79_ddr_base;
++void __iomem *ath79_ddr_base;
+ static void __iomem *ath79_ddr_wb_flush_base;
+ static void __iomem *ath79_ddr_pci_win_base;
+ 
+--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
++++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+@@ -32,7 +32,7 @@
+ #define AR71XX_SPI_SIZE		0x01000000
+ 
+ #define AR71XX_DDR_CTRL_BASE	(AR71XX_APB_BASE + 0x00000000)
+-#define AR71XX_DDR_CTRL_SIZE	0x100
++#define AR71XX_DDR_CTRL_SIZE	0x200
+ #define AR71XX_UART_BASE	(AR71XX_APB_BASE + 0x00020000)
+ #define AR71XX_UART_SIZE	0x100
+ #define AR71XX_USB_CTRL_BASE	(AR71XX_APB_BASE + 0x00030000)
+@@ -218,6 +218,9 @@
+ #define QCA953X_DDR_REG_FLUSH_PCIE	0xa8
+ #define QCA953X_DDR_REG_FLUSH_WMAC	0xac
+ 
++#define QCA955X_DDR_CTL_CONFIG		0x108
++#define QCA955X_DDR_CTL_CONFIG_ACT_WMAC	BIT(23)
++
+ /*
+  * PLL block
+  */
+--- a/arch/mips/ath79/dev-wmac.c
++++ b/arch/mips/ath79/dev-wmac.c
+@@ -171,6 +171,27 @@ static void qca953x_wmac_setup(void)
+ 	ath79_wmac_data.get_mac_revision = ar93xx_get_soc_revision;
+ }
+ 
++static int ar955x_wmac_reset(void)
++{
++	int i;
++
++	/* Try to wait for WMAC DDR activity to stop */
++	for (i = 0; i < 10; i++) {
++		if (!(__raw_readl(ath79_ddr_base + QCA955X_DDR_CTL_CONFIG) &
++		      QCA955X_DDR_CTL_CONFIG_ACT_WMAC))
++			break;
++
++		udelay(10);
++	}
++
++	ath79_device_reset_set(QCA955X_RESET_RTC);
++	udelay(10);
++	ath79_device_reset_clear(QCA955X_RESET_RTC);
++	udelay(10);
++
++	return 0;
++}
++
+ static void qca955x_wmac_setup(void)
+ {
+ 	u32 t;
+@@ -187,6 +208,8 @@ static void qca955x_wmac_setup(void)
+ 		ath79_wmac_data.is_clk_25mhz = false;
+ 	else
+ 		ath79_wmac_data.is_clk_25mhz = true;
++
++	ath79_wmac_data.external_reset = ar955x_wmac_reset;
+ }
+ 
+ static void qca956x_wmac_setup(void)
+--- a/arch/mips/ath79/common.h
++++ b/arch/mips/ath79/common.h
+@@ -19,6 +19,8 @@
+ #define ATH79_MEM_SIZE_MIN	(2 * 1024 * 1024)
+ #define ATH79_MEM_SIZE_MAX	(256 * 1024 * 1024)
+ 
++extern void __iomem *ath79_ddr_base;
++
+ void ath79_clocks_init(void);
+ unsigned long ath79_get_sys_clk_rate(const char *id);
+ 
diff --git a/target/linux/ar71xx/patches-4.4/820-MIPS-ath79-add_gpio_function2_setup.patch b/target/linux/ar71xx/patches-4.4/820-MIPS-ath79-add_gpio_function2_setup.patch
index f7f6b7203e..7db6ad361f 100644
--- a/target/linux/ar71xx/patches-4.4/820-MIPS-ath79-add_gpio_function2_setup.patch
+++ b/target/linux/ar71xx/patches-4.4/820-MIPS-ath79-add_gpio_function2_setup.patch
@@ -4,7 +4,7 @@ functions on the Arduino Yun.
 
 --- a/arch/mips/ath79/common.h
 +++ b/arch/mips/ath79/common.h
-@@ -28,6 +28,7 @@ void ath79_ddr_wb_flush(unsigned int reg
+@@ -30,6 +30,7 @@ void ath79_ddr_wb_flush(unsigned int reg
  void ath79_gpio_function_enable(u32 mask);
  void ath79_gpio_function_disable(u32 mask);
  void ath79_gpio_function_setup(u32 set, u32 clear);
@@ -48,7 +48,7 @@ functions on the Arduino Yun.
  	void __iomem *reg = ath79_gpio_get_function_reg();
 --- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
 +++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
-@@ -847,6 +847,7 @@
+@@ -850,6 +850,7 @@
  #define AR71XX_GPIO_REG_INT_PENDING	0x20
  #define AR71XX_GPIO_REG_INT_ENABLE	0x24
  #define AR71XX_GPIO_REG_FUNC		0x28
@@ -56,7 +56,7 @@ functions on the Arduino Yun.
  
  #define AR934X_GPIO_REG_OUT_FUNC0	0x2c
  #define AR934X_GPIO_REG_OUT_FUNC1	0x30
-@@ -971,6 +972,8 @@
+@@ -974,6 +975,8 @@
  #define AR724X_GPIO_FUNC_UART_EN		BIT(1)
  #define AR724X_GPIO_FUNC_JTAG_DISABLE		BIT(0)