Register the second uart on tnetd7300 and fix the watchdog register for 7200/7300, thanks to DerAgo (#2149)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8280 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 90 insertions, 56 deletions

diff --git a/target/linux/ar7-2.6/files/arch/mips/ar7/platform.c b/target/linux/ar7-2.6/files/arch/mips/ar7/platform.c
index b9f7d0e9f9..622f5d2141 100644
--- a/target/linux/ar7-2.6/files/arch/mips/ar7/platform.c
+++ b/target/linux/ar7-2.6/files/arch/mips/ar7/platform.c
@@ -252,30 +252,40 @@ static struct platform_device vlynq_high = {
  * as xscale and, obviously, don't work...
  */
 #if !defined(CONFIG_SERIAL_8250)
+
+static struct plat_serial8250_port uart0_data =
+{
+	.mapbase = AR7_REGS_UART0,
+	.irq = AR7_IRQ_UART0,
+	.regshift = 2,
+	.iotype = UPIO_MEM,
+	.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
+};
+
+static struct plat_serial8250_port uart1_data =
+{
+	.mapbase = UR8_REGS_UART1,
+	.irq = AR7_IRQ_UART1,
+	.regshift = 2,
+	.iotype = UPIO_MEM,
+	.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
+};
+
 static struct plat_serial8250_port uart_data[] = {
-	{
-		.mapbase = AR7_REGS_UART0,
-		.irq = AR7_IRQ_UART0,
-		.regshift = 2,
-		.iotype = UPIO_MEM,
-		.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
-	},
-	{
-		.mapbase = AR7_REGS_UART1,
-		.irq = AR7_IRQ_UART1,
-		.regshift = 2,
-		.iotype = UPIO_MEM,
-		.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
-	},
-	{
-		.flags = 0,
-	},
+    uart0_data,
+    uart1_data,
+	{ .flags = 0 }
+};
+
+static struct plat_serial8250_port uart_data_single[] = {
+    uart0_data,
+	{ .flags = 0 }
 };
 
 static struct platform_device uart = {
 	.id = 0,
 	.name = "serial8250",
-	.dev.platform_data = uart_data,
+	.dev.platform_data = uart_data_single
 };
 #endif
 
@@ -317,7 +327,8 @@ static int __init ar7_register_devices(void)
 {
 	int res;
 
-#if defined(CONFIG_SERIAL_8250)
+#ifdef CONFIG_SERIAL_8250
+
 	static struct uart_port uart_port[2];
 
 	memset(uart_port, 0, sizeof(struct uart_port) * 2);
@@ -334,24 +345,38 @@ static int __init ar7_register_devices(void)
 	if (res)
 		return res;
 
-	uart_port[1].type = PORT_AR7;
-	uart_port[1].line = 1;
-	uart_port[1].irq = AR7_IRQ_UART1;
-	uart_port[1].uartclk = ar7_bus_freq() / 2;
-	uart_port[1].iotype = UPIO_MEM;
-	uart_port[1].mapbase = AR7_REGS_UART1;
-	uart_port[1].membase = ioremap(uart_port[1].mapbase, 256);
-	uart_port[1].regshift = 2;
-	res = early_serial_setup(&uart_port[1]);
-	if (res)
-		return res;
-#else
+
+    // Only TNETD73xx have a second serial port
+    if (ar7_has_second_uart()) {
+    	uart_port[1].type = PORT_AR7;
+    	uart_port[1].line = 1;
+    	uart_port[1].irq = AR7_IRQ_UART1;
+    	uart_port[1].uartclk = ar7_bus_freq() / 2;
+    	uart_port[1].iotype = UPIO_MEM;
+    	uart_port[1].mapbase = UR8_REGS_UART1;
+    	uart_port[1].membase = ioremap(uart_port[1].mapbase, 256);
+    	uart_port[1].regshift = 2;
+    	res = early_serial_setup(&uart_port[1]);
+    	if (res)
+    		return res;
+    }
+    
+#else // !CONFIG_SERIAL_8250
+
 	uart_data[0].uartclk = ar7_bus_freq() / 2;
 	uart_data[1].uartclk = uart_data[0].uartclk;
+
+    // Only TNETD73xx have a second serial port
+    if (ar7_has_second_uart()) {
+        uart.dev.platform_data = uart_data;
+    }
+
 	res = platform_device_register(&uart);
 	if (res)
 		return res;
-#endif
+        
+#endif // CONFIG_SERIAL_8250
+
 	res = platform_device_register(&physmap_flash);
 	if (res)
 		return res;
diff --git a/target/linux/ar7-2.6/files/drivers/char/watchdog/ar7_wdt.c b/target/linux/ar7-2.6/files/drivers/char/watchdog/ar7_wdt.c
index 59ac693d43..50dfb5ef3c 100644
--- a/target/linux/ar7-2.6/files/drivers/char/watchdog/ar7_wdt.c
+++ b/target/linux/ar7-2.6/files/drivers/char/watchdog/ar7_wdt.c
@@ -73,10 +73,27 @@ static unsigned expect_close;
 /* XXX currently fixed, allows max margin ~68.72 secs */
 #define prescale_value 0xFFFF
 
+// Offset of the WDT registers
+static unsigned long ar7_regs_wdt;
+// Pointer to the remapped WDT IO space
+static ar7_wdt_t *ar7_wdt;
+static void ar7_wdt_get_regs(void)
+{
+    u16 chip_id = ar7_chip_id();
+    switch (chip_id)
+    {
+    case AR7_CHIP_7100:
+    case AR7_CHIP_7200:
+        ar7_regs_wdt = AR7_REGS_WDT;
+        break;
+    default:
+        ar7_regs_wdt = UR8_REGS_WDT;
+        break;
+    }
+}
+                     
 static void ar7_wdt_kick(u32 value)
 {
-	volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
-
 	ar7_wdt->kick_lock = 0x5555;
 	if ((ar7_wdt->kick_lock & 3) == 1) {
 		ar7_wdt->kick_lock = 0xAAAA;
@@ -90,8 +107,6 @@ static void ar7_wdt_kick(u32 value)
 
 static void ar7_wdt_prescale(u32 value)
 {
-	volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
-
 	ar7_wdt->prescale_lock = 0x5A5A;
 	if ((ar7_wdt->prescale_lock & 3) == 1) {
 		ar7_wdt->prescale_lock = 0xA5A5;
@@ -105,8 +120,6 @@ static void ar7_wdt_prescale(u32 value)
 
 static void ar7_wdt_change(u32 value)
 {
-	volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
-
 	ar7_wdt->change_lock = 0x6666;
 	if ((ar7_wdt->change_lock & 3) == 1) {
 		ar7_wdt->change_lock = 0xBBBB;
@@ -120,8 +133,6 @@ static void ar7_wdt_change(u32 value)
 
 static void ar7_wdt_disable(u32 value)
 {
-	volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
-
 	ar7_wdt->disable_lock = 0x7777;
 	if ((ar7_wdt->disable_lock & 3) == 1) {
 		ar7_wdt->disable_lock = 0xCCCC;
@@ -285,12 +296,16 @@ static struct miscdevice ar7_wdt_miscdev = {
 static int __init ar7_wdt_init(void)
 {
 	int rc;
+    
+    ar7_wdt_get_regs();
 
-	if (!request_mem_region(AR7_REGS_WDT, sizeof(ar7_wdt_t), LONGNAME)) {
+	if (!request_mem_region(ar7_regs_wdt, sizeof(ar7_wdt_t), LONGNAME)) {
 		printk(KERN_WARNING DRVNAME ": watchdog I/O region busy\n");
 		return -EBUSY;
 	}
 
+	ar7_wdt = (ar7_wdt_t *)ioremap(ar7_regs_wdt, sizeof(ar7_wdt_t));
+
 	ar7_wdt_disable_wdt();
 	ar7_wdt_prescale(prescale_value);
 	ar7_wdt_update_margin(margin);
@@ -313,7 +328,7 @@ static int __init ar7_wdt_init(void)
 out_register:
 	misc_deregister(&ar7_wdt_miscdev);
 out_alloc:
-	release_mem_region(AR7_REGS_WDT, sizeof(ar7_wdt_t));
+	release_mem_region(ar7_regs_wdt, sizeof(ar7_wdt_t));
 out:
 	return rc;
 }
@@ -322,7 +337,8 @@ static void __exit ar7_wdt_cleanup(void)
 {
         unregister_reboot_notifier(&ar7_wdt_notifier);
 	misc_deregister(&ar7_wdt_miscdev);
-	release_mem_region(AR7_REGS_WDT, sizeof(ar7_wdt_t));
+    iounmap(ar7_wdt);
+	release_mem_region(ar7_regs_wdt, sizeof(ar7_wdt_t));
 }
 
 module_init(ar7_wdt_init);
diff --git a/target/linux/ar7-2.6/files/include/asm-mips/ar7/ar7.h b/target/linux/ar7-2.6/files/include/asm-mips/ar7/ar7.h
index 9a8348b5b7..49e66ff3af 100644
--- a/target/linux/ar7-2.6/files/include/asm-mips/ar7/ar7.h
+++ b/target/linux/ar7-2.6/files/include/asm-mips/ar7/ar7.h
@@ -28,27 +28,21 @@
 #define AR7_REGS_BASE 0x08610000
 
 #define AR7_REGS_MAC0   (AR7_REGS_BASE + 0x0000)
-#define AR7_REGS_EMIF   (AR7_REGS_BASE + 0x0800)
 #define AR7_REGS_GPIO   (AR7_REGS_BASE + 0x0900)
-#define AR7_REGS_POWER  (AR7_REGS_BASE + 0x0a00)
-#define AR7_REGS_WDT    (AR7_REGS_BASE + 0x0b00)
-#define AR7_REGS_TIMER0 (AR7_REGS_BASE + 0x0c00)
-#define AR7_REGS_TIMER1 (AR7_REGS_BASE + 0x0d00)
+#define AR7_REGS_POWER  (AR7_REGS_BASE + 0x0a00) // 0x08610A00 - 0x08610BFF (512 bytes, 128 bytes / clock)
 #define AR7_REGS_UART0  (AR7_REGS_BASE + 0x0e00)
-#define AR7_REGS_UART1  (AR7_REGS_BASE + 0x0f00)
-#define AR7_REGS_I2C    (AR7_REGS_BASE + 0x1000)
-#define AR7_REGS_USB    (AR7_REGS_BASE + 0x1200)
-#define AR7_REGS_DMA    (AR7_REGS_BASE + 0x1400)
 #define AR7_REGS_RESET  (AR7_REGS_BASE + 0x1600)
-#define AR7_REGS_BIST   (AR7_REGS_BASE + 0x1700)
 #define AR7_REGS_VLYNQ0 (AR7_REGS_BASE + 0x1800)
 #define AR7_REGS_DCL    (AR7_REGS_BASE + 0x1A00)
 #define AR7_REGS_VLYNQ1 (AR7_REGS_BASE + 0x1C00)
 #define AR7_REGS_MDIO   (AR7_REGS_BASE + 0x1E00)
-#define AR7_REGS_FSER   (AR7_REGS_BASE + 0x2000)
 #define AR7_REGS_IRQ    (AR7_REGS_BASE + 0x2400)
 #define AR7_REGS_MAC1   (AR7_REGS_BASE + 0x2800)
 
+#define AR7_REGS_WDT    (AR7_REGS_BASE + 0x1f00)
+#define UR8_REGS_WDT    (AR7_REGS_BASE + 0x0b00)
+#define UR8_REGS_UART1  (AR7_REGS_BASE + 0x0f00)
+
 #define  AR7_RESET_PEREPHERIAL 0x0
 #define  AR7_RESET_SOFTWARE    0x4
 #define  AR7_RESET_STATUS      0x8
@@ -64,8 +58,6 @@
 #define  AR7_GPIO_DIR    0x8
 #define  AR7_GPIO_ENABLE 0xC
 
-#define AR7_GPIO_BIT_STATUS_LED   8
-
 #define AR7_CHIP_7100 0x18
 #define AR7_CHIP_7200 0x2b
 #define AR7_CHIP_7300 0x05
@@ -131,6 +123,7 @@ static inline int ar7_has_high_cpmac(void)
 	}
 }
 #define ar7_has_high_vlynq ar7_has_high_cpmac
+#define ar7_has_second_uart ar7_has_high_cpmac
 
 static inline void ar7_device_enable(u32 bit)
 {