Extend the Atheros SoC support to include a method to enable/disable

the NAND flash controller.

Add the AR934x NAND flash controller reset routines.
(It's different on subsequent SoCs.)

Tested:

* AR9344, Atheros DB120 reference platform

Obtained from:	OpenWRT

2 files changed, 36 insertions, 0 deletions

diff --git a/sys/mips/atheros/ar71xx_cpudef.h b/sys/mips/atheros/ar71xx_cpudef.h
index 9a1133b..85618d4 100644
--- a/sys/mips/atheros/ar71xx_cpudef.h
+++ b/sys/mips/atheros/ar71xx_cpudef.h
@@ -63,6 +63,8 @@ struct ar71xx_cpu_def {
 	void (* ar71xx_chip_reset_wmac) (void);
 
 	void (* ar71xx_chip_init_gmac) (void);
+
+	void (* ar71xx_chip_reset_nfc) (int);
 };
 
 extern struct ar71xx_cpu_def * ar71xx_cpu_ops;
@@ -140,6 +142,13 @@ static inline void ar71xx_device_ddr_flush_ip2(void)
 	ar71xx_cpu_ops->ar71xx_chip_ddr_flush_ip2();
 }
 
+static inline void ar71xx_reset_nfc(int active)
+{
+
+	if (ar71xx_cpu_ops->ar71xx_chip_reset_nfc)
+		ar71xx_cpu_ops->ar71xx_chip_reset_nfc(active);
+}
+
 /* XXX shouldn't be here! */
 extern uint32_t u_ar71xx_refclk;
 extern uint32_t u_ar71xx_cpu_freq;
diff --git a/sys/mips/atheros/ar934x_chip.c b/sys/mips/atheros/ar934x_chip.c
index 1266fc8..d66fd59 100644
--- a/sys/mips/atheros/ar934x_chip.c
+++ b/sys/mips/atheros/ar934x_chip.c
@@ -375,6 +375,7 @@ static void
 ar934x_chip_reset_wmac(void)
 {
 
+	/* XXX TODO */
 }
 
 static void
@@ -391,6 +392,31 @@ ar934x_chip_init_gmac(void)
 	}
 }
 
+/*
+ * Reset the NAND Flash Controller.
+ *
+ * + active=1 means "make it active".
+ * + active=0 means "make it inactive".
+ */
+static void
+ar934x_chip_reset_nfc(int active)
+{
+
+	if (active) {
+		ar71xx_device_start(AR934X_RESET_NANDF);
+		DELAY(100);
+
+		ar71xx_device_start(AR934X_RESET_ETH_SWITCH_ANALOG);
+		DELAY(250);
+	} else {
+		ar71xx_device_stop(AR934X_RESET_ETH_SWITCH_ANALOG);
+		DELAY(250);
+
+		ar71xx_device_stop(AR934X_RESET_NANDF);
+		DELAY(100);
+	}
+}
+
 struct ar71xx_cpu_def ar934x_chip_def = {
 	&ar934x_chip_detect_mem_size,
 	&ar934x_chip_detect_sys_frequency,
@@ -407,4 +433,5 @@ struct ar71xx_cpu_def ar934x_chip_def = {
 	&ar934x_chip_reset_ethernet_switch,
 	&ar934x_chip_reset_wmac,
 	&ar934x_chip_init_gmac,
+	&ar934x_chip_reset_nfc,
 };