+static void prom_putchar_ar933x(unsigned char ch)
+{
+ while (((UART_READ(0)) & 0x200) == 0)
+ ;
+ UART_WRITE(0, 0x200 | ch);
+ while (((UART_READ(0)) & 0x200) == 0)
+ ;
+}
+
+static int prom_putchar_init(void)
+{
+ if (_putchar)
+ return 0;
+
+ switch(ar71xx_soc) {
+ case AR71XX_SOC_AR7130:
+ case AR71XX_SOC_AR7141:
+ case AR71XX_SOC_AR7161:
+ case AR71XX_SOC_AR7240:
+ case AR71XX_SOC_AR7241:
+ case AR71XX_SOC_AR7242:
+ case AR71XX_SOC_AR9130:
+ case AR71XX_SOC_AR9132:
+ case AR71XX_SOC_AR9341:
+ case AR71XX_SOC_AR9342:
+ case AR71XX_SOC_AR9344:
+ prom_uart_base = (void __iomem *) KSEG1ADDR(AR71XX_UART_BASE);
+ _putchar = prom_putchar_ar71xx;
+ break;
+
+ case AR71XX_SOC_AR9330:
+ case AR71XX_SOC_AR9331:
+ prom_uart_base = (void __iomem *) KSEG1ADDR(AR933X_UART_BASE);
+ _putchar = prom_putchar_ar933x;
+ break;
+
+ default:
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+void prom_putchar(unsigned char ch)
+{
+ if (prom_putchar_init())
+ return;
+
+ _putchar(ch);
+}