Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / serial / ns16550.c

diff --git a/qemu/roms/u-boot/drivers/serial/ns16550.c b/qemu/roms/u-boot/drivers/serial/ns16550.c
new file mode 100644 (file)
index 0000000..f26979d
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/serial/ns16550.c
@@ -0,0 +1,147 @@
+/*
+ * COM1 NS16550 support
+ * originally from linux source (arch/powerpc/boot/ns16550.c)
+ * modified to use CONFIG_SYS_ISA_MEM and new defines
+ */
+
+#include <config.h>
+#include <ns16550.h>
+#include <watchdog.h>
+#include <linux/types.h>
+#include <asm/io.h>
+
+#define UART_LCRVAL UART_LCR_8N1               /* 8 data, 1 stop, no parity */
+#define UART_MCRVAL (UART_MCR_DTR | \
+                    UART_MCR_RTS)              /* RTS/DTR */
+#define UART_FCRVAL (UART_FCR_FIFO_EN |        \
+                    UART_FCR_RXSR |    \
+                    UART_FCR_TXSR)             /* Clear & enable FIFOs */
+#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
+#define serial_out(x, y)       outb(x, (ulong)y)
+#define serial_in(y)           inb((ulong)y)
+#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE > 0)
+#define serial_out(x, y)       out_be32(y, x)
+#define serial_in(y)           in_be32(y)
+#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE < 0)
+#define serial_out(x, y)       out_le32(y, x)
+#define serial_in(y)           in_le32(y)
+#else
+#define serial_out(x, y)       writeb(x, y)
+#define serial_in(y)           readb(y)
+#endif
+
+#if defined(CONFIG_K2HK_EVM)
+#define UART_REG_VAL_PWREMU_MGMT_UART_DISABLE   0
+#define UART_REG_VAL_PWREMU_MGMT_UART_ENABLE ((1 << 14) | (1 << 13) | (1 << 0))
+#undef UART_MCRVAL
+#ifdef CONFIG_SERIAL_HW_FLOW_CONTROL
+#define UART_MCRVAL             (UART_MCR_RTS | UART_MCR_AFE)
+#else
+#define UART_MCRVAL             (UART_MCR_RTS)
+#endif
+#endif
+
+#ifndef CONFIG_SYS_NS16550_IER
+#define CONFIG_SYS_NS16550_IER  0x00
+#endif /* CONFIG_SYS_NS16550_IER */
+
+void NS16550_init(NS16550_t com_port, int baud_divisor)
+{
+#if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_OMAP34XX))
+       /*
+        * On some OMAP3 devices when UART3 is configured for boot mode before
+        * SPL starts only THRE bit is set. We have to empty the transmitter
+        * before initialization starts.
+        */
+       if ((serial_in(&com_port->lsr) & (UART_LSR_TEMT | UART_LSR_THRE))
+            == UART_LSR_THRE) {
+               serial_out(UART_LCR_DLAB, &com_port->lcr);
+               serial_out(baud_divisor & 0xff, &com_port->dll);
+               serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
+               serial_out(UART_LCRVAL, &com_port->lcr);
+               serial_out(0, &com_port->mdr1);
+       }
+#endif
+
+       while (!(serial_in(&com_port->lsr) & UART_LSR_TEMT))
+               ;
+
+       serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
+#if defined(CONFIG_OMAP) || defined(CONFIG_AM33XX) || \
+                       defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX)
+       serial_out(0x7, &com_port->mdr1);       /* mode select reset TL16C750*/
+#endif
+       serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
+       serial_out(0, &com_port->dll);
+       serial_out(0, &com_port->dlm);
+       serial_out(UART_LCRVAL, &com_port->lcr);
+       serial_out(UART_MCRVAL, &com_port->mcr);
+       serial_out(UART_FCRVAL, &com_port->fcr);
+       serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
+       serial_out(baud_divisor & 0xff, &com_port->dll);
+       serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
+       serial_out(UART_LCRVAL, &com_port->lcr);
+#if (defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)) || \
+       defined(CONFIG_AM33XX) || defined(CONFIG_SOC_DA8XX) || \
+       defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX)
+
+       /* /16 is proper to hit 115200 with 48MHz */
+       serial_out(0, &com_port->mdr1);
+#endif /* CONFIG_OMAP */
+#if defined(CONFIG_K2HK_EVM)
+       serial_out(UART_REG_VAL_PWREMU_MGMT_UART_ENABLE, &com_port->regC);
+#endif
+}
+
+#ifndef CONFIG_NS16550_MIN_FUNCTIONS
+void NS16550_reinit(NS16550_t com_port, int baud_divisor)
+{
+       serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
+       serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
+       serial_out(0, &com_port->dll);
+       serial_out(0, &com_port->dlm);
+       serial_out(UART_LCRVAL, &com_port->lcr);
+       serial_out(UART_MCRVAL, &com_port->mcr);
+       serial_out(UART_FCRVAL, &com_port->fcr);
+       serial_out(UART_LCR_BKSE, &com_port->lcr);
+       serial_out(baud_divisor & 0xff, &com_port->dll);
+       serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
+       serial_out(UART_LCRVAL, &com_port->lcr);
+}
+#endif /* CONFIG_NS16550_MIN_FUNCTIONS */
+
+void NS16550_putc(NS16550_t com_port, char c)
+{
+       while ((serial_in(&com_port->lsr) & UART_LSR_THRE) == 0)
+               ;
+       serial_out(c, &com_port->thr);
+
+       /*
+        * Call watchdog_reset() upon newline. This is done here in putc
+        * since the environment code uses a single puts() to print the complete
+        * environment upon "printenv". So we can't put this watchdog call
+        * in puts().
+        */
+       if (c == '\n')
+               WATCHDOG_RESET();
+}
+
+#ifndef CONFIG_NS16550_MIN_FUNCTIONS
+char NS16550_getc(NS16550_t com_port)
+{
+       while ((serial_in(&com_port->lsr) & UART_LSR_DR) == 0) {
+#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_USB_TTY)
+               extern void usbtty_poll(void);
+               usbtty_poll();
+#endif
+               WATCHDOG_RESET();
+       }
+       return serial_in(&com_port->rbr);
+}
+
+int NS16550_tstc(NS16550_t com_port)
+{
+       return (serial_in(&com_port->lsr) & UART_LSR_DR) != 0;
+}
+
+#endif /* CONFIG_NS16550_MIN_FUNCTIONS */