carl9170 firmware: update pram size comment

[carl9170fw.git] / carlfw / src / main.c

diff --git a/carlfw/src/main.c b/carlfw/src/main.c
index f62e5ee7b6ce612a1c786ebf4a049fe990e76c53..b9239c8e4969b5fcf5ca3dcc437886d8a613bb47 100644 (file)
--- a/carlfw/src/main.c
+++ b/carlfw/src/main.c
@@ -32,6 +32,18 @@
 
 #define AR9170_WATCH_DOG_TIMER            0x100
 
+static void timer_init(const unsigned int timer, const unsigned int interval)
+{
+       /* Set timer to periodic mode */
+       orl(AR9170_TIMER_REG_CONTROL, BIT(timer));
+
+       /* Set time interval */
+       set(AR9170_TIMER_REG_TIMER0 + (timer << 2), interval - 1);
+
+       /* Clear timer interrupt flag */
+       orl(AR9170_TIMER_REG_INTERRUPT, BIT(timer));
+}
+
 static void init(void)
 {
        led_init();
@@ -46,6 +58,7 @@ static void init(void)
        /* USB init */
        usb_init();
 
+       /* initialize DMA memory */
        memset(&dma_mem, 0, sizeof(dma_mem));
 
        /* fill DMA rings */
@@ -84,7 +97,45 @@ static void handle_fw(void)
                reboot();
 }
 
-static void __attribute__((noreturn)) main_loop(void)
+static void timer0_isr(void)
+{
+       wlan_timer();
+
+#ifdef CONFIG_CARL9170FW_GPIO_INTERRUPT
+       gpio_timer();
+#endif /* CONFIG_CARL9170FW_GPIO_INTERRUPT */
+
+#ifdef CONFIG_CARL9170FW_DEBUG_LED_HEARTBEAT
+       set(AR9170_GPIO_REG_PORT_DATA, get(AR9170_GPIO_REG_PORT_DATA) ^ 1);
+#endif /* CONFIG_CARL9170FW_DEBUG_LED_HEARTBEAT */
+}
+
+static void handle_timer(void)
+{
+       uint32_t intr;
+
+       intr = get(AR9170_TIMER_REG_INTERRUPT);
+
+       /* ACK timer interrupt */
+       set(AR9170_TIMER_REG_INTERRUPT, intr);
+
+#define HANDLER(intr, flag, func)                      \
+       do {                                            \
+               if ((intr & flag) != 0) {               \
+                       intr &= ~flag;                  \
+                       func();                         \
+               }                                       \
+       } while (0)
+
+       HANDLER(intr, BIT(0), timer0_isr);
+
+       if (intr)
+               DBG("Unhandled Timer Event %x", (unsigned int) intr);
+
+#undef HANDLER
+}
+
+static void __noreturn main_loop(void)
 {
        /* main loop */
        while (1) {
@@ -108,21 +159,18 @@ static void __attribute__((noreturn)) main_loop(void)
 
 /*
  * The bootcode will work with the device driver to load the firmware
- * onto the device's Program SRAM. The Program SRAM has a size of 32 KB
- * and also contains the stack, which grows down from 0x208000.
+ * onto the device's Program SRAM. The Program SRAM has a size of 16 KB
+ * and also contains the stack, which grows down from 0x204000.
  *
  * The Program SRAM starts at address 0x200000 on the device.
  * The firmware entry point (0x200004) is located in boot.S.
  * we put _start() there with the linker script carl9170.lds.
  */
 
-void __attribute__((noreturn)) start(void)
+void start(void)
 {
        clock_set(true, AHB_40MHZ_OSC);
 
-       /* initialize firmware context and DMA memory */
-       memset(&fw, 0, sizeof(fw));
-
        /* watchdog magic pattern check */
        if ((get(AR9170_PWR_REG_WATCH_DOG_MAGIC) & 0xffff0000) == 0x12340000) {
                /* watch dog warm start */