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authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-22 20:05:27 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-22 20:05:27 +0300
commit75ea6358bc7d97630a8edc2b89c930de118cf7eb (patch)
treee77a60e46844adf71758bad41d77d40658acd7eb /include/linux/i2c
parent14577beb8293c187a12d2e78ac6250d5dcec2190 (diff)
parent97491ba3f64c2137101efdfe7593305d692d7d63 (diff)
downloadlinux-75ea6358bc7d97630a8edc2b89c930de118cf7eb.tar.xz
Merge branch 'for-linus/2639/i2c-2' of git://git.fluff.org/bjdooks/linux
* 'for-linus/2639/i2c-2' of git://git.fluff.org/bjdooks/linux: i2c-pxa2xx: Don't clear isr bits too early i2c-pxa2xx: Fix register offsets i2c-pxa2xx: pass of_node from platform driver to adapter and publish i2c-pxa2xx: check timeout correctly i2c-pxa2xx: add support for shared IRQ handler i2c-pxa2xx: Add PCI support for PXA I2C controller ARM: pxa2xx: reorganize I2C files i2c-pxa2xx: use dynamic register layout i2c-mxs: set controller to pio queue mode after reset i2c-eg20t: support new device OKI SEMICONDUCTOR ML7213 IOH i2c/busses: Add support for Diolan U2C-12 USB-I2C adapter
Diffstat (limited to 'include/linux/i2c')
-rw-r--r--include/linux/i2c/pxa-i2c.h82
1 files changed, 82 insertions, 0 deletions
diff --git a/include/linux/i2c/pxa-i2c.h b/include/linux/i2c/pxa-i2c.h
new file mode 100644
index 000000000000..1a9f65e6ec0f
--- /dev/null
+++ b/include/linux/i2c/pxa-i2c.h
@@ -0,0 +1,82 @@
+/*
+ * i2c_pxa.h
+ *
+ * Copyright (C) 2002 Intrinsyc Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#ifndef _I2C_PXA_H_
+#define _I2C_PXA_H_
+
+#if 0
+#define DEF_TIMEOUT 3
+#else
+/* need a longer timeout if we're dealing with the fact we may well be
+ * looking at a multi-master environment
+*/
+#define DEF_TIMEOUT 32
+#endif
+
+#define BUS_ERROR (-EREMOTEIO)
+#define XFER_NAKED (-ECONNREFUSED)
+#define I2C_RETRY (-2000) /* an error has occurred retry transmit */
+
+/* ICR initialize bit values
+*
+* 15. FM 0 (100 Khz operation)
+* 14. UR 0 (No unit reset)
+* 13. SADIE 0 (Disables the unit from interrupting on slave addresses
+* matching its slave address)
+* 12. ALDIE 0 (Disables the unit from interrupt when it loses arbitration
+* in master mode)
+* 11. SSDIE 0 (Disables interrupts from a slave stop detected, in slave mode)
+* 10. BEIE 1 (Enable interrupts from detected bus errors, no ACK sent)
+* 9. IRFIE 1 (Enable interrupts from full buffer received)
+* 8. ITEIE 1 (Enables the I2C unit to interrupt when transmit buffer empty)
+* 7. GCD 1 (Disables i2c unit response to general call messages as a slave)
+* 6. IUE 0 (Disable unit until we change settings)
+* 5. SCLE 1 (Enables the i2c clock output for master mode (drives SCL)
+* 4. MA 0 (Only send stop with the ICR stop bit)
+* 3. TB 0 (We are not transmitting a byte initially)
+* 2. ACKNAK 0 (Send an ACK after the unit receives a byte)
+* 1. STOP 0 (Do not send a STOP)
+* 0. START 0 (Do not send a START)
+*
+*/
+#define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE)
+
+/* I2C status register init values
+ *
+ * 10. BED 1 (Clear bus error detected)
+ * 9. SAD 1 (Clear slave address detected)
+ * 7. IRF 1 (Clear IDBR Receive Full)
+ * 6. ITE 1 (Clear IDBR Transmit Empty)
+ * 5. ALD 1 (Clear Arbitration Loss Detected)
+ * 4. SSD 1 (Clear Slave Stop Detected)
+ */
+#define I2C_ISR_INIT 0x7FF /* status register init */
+
+struct i2c_slave_client;
+
+struct i2c_pxa_platform_data {
+ unsigned int slave_addr;
+ struct i2c_slave_client *slave;
+ unsigned int class;
+ unsigned int use_pio :1;
+ unsigned int fast_mode :1;
+};
+
+extern void pxa_set_i2c_info(struct i2c_pxa_platform_data *info);
+
+#ifdef CONFIG_PXA27x
+extern void pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info);
+#endif
+
+#ifdef CONFIG_PXA3xx
+extern void pxa3xx_set_i2c_power_info(struct i2c_pxa_platform_data *info);
+#endif
+
+#endif