TTY: 68328serial, remove 68328serial.h

All the needed stuff is moved to 68328serial.c now.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-m68k@lists.linux-m68k.org
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 76 insertions, 3 deletions

diff --git a/drivers/tty/serial/68328serial.c b/drivers/tty/serial/68328serial.c
index f0d5039a7b34..116d932401ed 100644
--- a/drivers/tty/serial/68328serial.c
+++ b/drivers/tty/serial/68328serial.c
@@ -57,8 +57,6 @@
 #endif /* CONFIG_M68VZ328 */
 #endif /* CONFIG_M68EZ328 */
 
-#include "68328serial.h"
-
 /* Turn off usage of real serial interrupt code, to "support" Copilot */
 #ifdef CONFIG_XCOPILOT_BUGS
 #undef USE_INTS
@@ -66,9 +64,84 @@
 #define USE_INTS
 #endif
 
+/*
+ * I believe this is the optimal setting that reduces the number of interrupts.
+ * At high speeds the output might become a little "bursted" (use USTCNT_TXHE
+ * if that bothers you), but in most cases it will not, since we try to
+ * transmit characters every time rs_interrupt is called. Thus, quite often
+ * you'll see that a receive interrupt occures before the transmit one.
+ *                                  -- Vladimir Gurevich
+ */
+#define USTCNT_TX_INTR_MASK (USTCNT_TXEE)
+
+/*
+ * 68328 and 68EZ328 UARTS are a little bit different. EZ328 has special
+ * "Old data interrupt" which occures whenever the data stay in the FIFO
+ * longer than 30 bits time. This allows us to use FIFO without compromising
+ * latency. '328 does not have this feature and without the real  328-based
+ * board I would assume that RXRE is the safest setting.
+ *
+ * For EZ328 I use RXHE (Half empty) interrupt to reduce the number of
+ * interrupts. RXFE (receive queue full) causes the system to lose data
+ * at least at 115200 baud
+ *
+ * If your board is busy doing other stuff, you might consider to use
+ * RXRE (data ready intrrupt) instead.
+ *
+ * The other option is to make these INTR masks run-time configurable, so
+ * that people can dynamically adapt them according to the current usage.
+ *                                  -- Vladimir Gurevich
+ */
+
+/* (es) */
+#if defined(CONFIG_M68EZ328) || defined(CONFIG_M68VZ328)
+#define USTCNT_RX_INTR_MASK (USTCNT_RXHE | USTCNT_ODEN)
+#elif defined(CONFIG_M68328)
+#define USTCNT_RX_INTR_MASK (USTCNT_RXRE)
+#else
+#error Please, define the Rx interrupt events for your CPU
+#endif
+/* (/es) */
+
+/*
+ * This is our internal structure for each serial port's state.
+ *
+ * For definitions of the flags field, see serial.h
+ */
+struct m68k_serial {
+        char                    is_cons;        /* Is this our console. */
+        int                     magic;
+        int                     baud_base;
+        int                     port;
+        int                     irq;
+        int                     flags;          /* defined in tty.h */
+        int                     type;           /* UART type */
+        struct tty_struct       *tty;
+        int                     custom_divisor;
+        int                     x_char;         /* xon/xoff character */
+        int                     close_delay;
+        unsigned short          closing_wait;
+        int                     line;
+        int                     count;          /* # of fd on device */
+        int                     blocked_open;   /* # of blocked opens */
+        unsigned char           *xmit_buf;
+        int                     xmit_head;
+        int                     xmit_tail;
+        int                     xmit_cnt;
+        wait_queue_head_t       open_wait;
+        wait_queue_head_t       close_wait;
+};
+
+#define SERIAL_MAGIC 0x5301
+
+/*
+ * Define the number of ports supported and their irqs.
+ */
+#define NR_PORTS 1
+
 static struct m68k_serial m68k_soft[NR_PORTS];
 
-static unsigned int uart_irqs[NR_PORTS] = UART_IRQ_DEFNS;
+static unsigned int uart_irqs[NR_PORTS] = { UART_IRQ_NUM };
 
 /* multiple ports are contiguous in memory */
 m68328_uart *uart_addr = (m68328_uart *)USTCNT_ADDR;