patch-pre2.0.5 linux/include/asm-m68k/atari_SCCserial.h

• Lines: 61
• Date: Thu May 16 09:05:11 1996
• Orig file: pre2.0.4/linux/include/asm-m68k/atari_SCCserial.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file pre2.0.4/linux/include/asm-m68k/atari_SCCserial.h linux/include/asm-m68k/atari_SCCserial.h
@@ -0,0 +1,60 @@
+#ifndef _ATARI_SCCSERIAL_H
+#define _ATARI_SCCSERIAL_H
+
+/* Special configuration ioctls for the Atari SCC5380 Serial
+ * Communications Controller
+ */
+
+/* ioctl command codes */
+
+#define TIOCGATSCC	0x54c0	/* get SCC configuration */
+#define TIOCSATSCC	0x54c1	/* set SCC configuration */
+#define TIOCDATSCC	0x54c2	/* reset configuration to defaults */
+
+/* Clock sources */
+
+#define CLK_RTxC	0
+#define CLK_TRxC	1
+#define CLK_PCLK	2
+
+/* baud_bases for the common clocks in the Atari. These are the real
+ * frequencies divided by 16.
+ */
+   
+#define SCC_BAUD_BASE_TIMC	19200	/* 0.3072 MHz from TT-MFP, Timer C */
+#define SCC_BAUD_BASE_BCLK	153600	/* 2.4576 MHz */
+#define SCC_BAUD_BASE_PCLK4	229500	/* 3.6720 MHz */
+#define SCC_BAUD_BASE_PCLK	503374	/* 8.0539763 MHz */
+#define SCC_BAUD_BASE_NONE	0		/* for not connected or unused
+						 * clock sources */
+
+/* The SCC configuration structure */
+
+struct atari_SCCserial {
+	unsigned	RTxC_base;	/* base_baud of RTxC */
+	unsigned	TRxC_base;	/* base_baud of TRxC */
+	unsigned	PCLK_base;	/* base_baud of PCLK, for both channels! */
+	struct {
+		unsigned clksrc;	/* CLK_RTxC, CLK_TRxC or CLK_PCLK */
+		unsigned divisor;	/* divisor for base baud, valid values:
+					 * see below */
+	} baud_table[17];		/* For 50, 75, 110, 135, 150, 200, 300,
+					 * 600, 1200, 1800, 2400, 4800, 9600,
+					 * 19200, 38400, 57600 and 115200 bps. The
+					 * last two could be replaced by other
+					 * rates > 38400 if they're not possible.
+					 */
+};
+
+/* The following divisors are valid:
+ *
+ *   - CLK_RTxC: 1 or even (1, 2 and 4 are the direct modes, > 4 use
+ *               the BRG)
+ *
+ *   - CLK_TRxC: 1, 2 or 4 (no BRG, only direct modes possible)
+ *
+ *   - CLK_PCLK: >= 4 and even (no direct modes, only BRG)
+ *
+ */
+
+#endif /* _ATARI_SCCSERIAL_H */