1 files changed, 76 insertions, 0 deletions

diff --git a/drivers/i2c/algos/i2c-algo-pcf.h b/drivers/i2c/algos/i2c-algo-pcf.h
new file mode 100644
index 000000000000..5263a9eeb8d7
--- /dev/null
+++ b/drivers/i2c/algos/i2c-algo-pcf.h
@@ -0,0 +1,76 @@
+/* -------------------------------------------------------------------- */
+/* i2c-pcf8584.h: PCF 8584 global defines                               */
+/* -------------------------------------------------------------------- */
+/*   Copyright (C) 1996 Simon G. Vogl
+                   1999 Hans Berglund
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.           */
+/* -------------------------------------------------------------------- */
+
+/* With some changes from Frodo Looijaard <frodol@dds.nl> */
+
+#ifndef I2C_PCF8584_H
+#define I2C_PCF8584_H 1
+
+/* ----- Control register bits ---------------------------------------- */
+#define I2C_PCF_PIN     0x80
+#define I2C_PCF_ESO     0x40
+#define I2C_PCF_ES1     0x20
+#define I2C_PCF_ES2     0x10
+#define I2C_PCF_ENI     0x08
+#define I2C_PCF_STA     0x04
+#define I2C_PCF_STO     0x02
+#define I2C_PCF_ACK     0x01
+
+#define I2C_PCF_START    (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
+#define I2C_PCF_STOP     (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
+#define I2C_PCF_REPSTART (              I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
+#define I2C_PCF_IDLE     (I2C_PCF_PIN | I2C_PCF_ESO               | I2C_PCF_ACK)
+
+/* ----- Status register bits ----------------------------------------- */
+/*#define I2C_PCF_PIN  0x80    as above*/
+
+#define I2C_PCF_INI 0x40   /* 1 if not initialized */
+#define I2C_PCF_STS 0x20
+#define I2C_PCF_BER 0x10
+#define I2C_PCF_AD0 0x08
+#define I2C_PCF_LRB 0x08
+#define I2C_PCF_AAS 0x04
+#define I2C_PCF_LAB 0x02
+#define I2C_PCF_BB  0x01
+
+/* ----- Chip clock frequencies --------------------------------------- */
+#define I2C_PCF_CLK3    0x00
+#define I2C_PCF_CLK443  0x10
+#define I2C_PCF_CLK6    0x14
+#define I2C_PCF_CLK     0x18
+#define I2C_PCF_CLK12   0x1c
+
+/* ----- transmission frequencies ------------------------------------- */
+#define I2C_PCF_TRNS90 0x00     /*  90 kHz */
+#define I2C_PCF_TRNS45 0x01     /*  45 kHz */
+#define I2C_PCF_TRNS11 0x02     /*  11 kHz */
+#define I2C_PCF_TRNS15 0x03     /* 1.5 kHz */
+
+
+/* ----- Access to internal registers according to ES1,ES2 ------------ */
+/* they are mapped to the data port ( a0 = 0 )                          */
+/* available when ESO == 0 :                                            */
+
+#define I2C_PCF_OWNADR  0
+#define I2C_PCF_INTREG  I2C_PCF_ES2
+#define I2C_PCF_CLKREG  I2C_PCF_ES1
+
+#endif /* I2C_PCF8584_H */