summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-pxa/include/mach/i2c.h
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2008-08-08 11:38:42 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-08 11:38:42 -0700
commit49b75b87ce2dfbd99e59a50c3681b154d07e3a22 (patch)
treef14e1da19a13d87a512f9043c2f37fd75dd122b3 /arch/arm/mach-pxa/include/mach/i2c.h
parentf1c7f79b6ab4f7ada002a0fae47f462ede6b6857 (diff)
parent097d9eb537ff4d88b74c3fe67392e27c478ca3c5 (diff)
downloadtalos-obmc-linux-49b75b87ce2dfbd99e59a50c3681b154d07e3a22.tar.gz
talos-obmc-linux-49b75b87ce2dfbd99e59a50c3681b154d07e3a22.zip
Merge branch 'for-linus-merged' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus-merged' of master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 5177/1: arm/mach-sa1100/Makefile: remove CONFIG_SA1100_USB [ARM] 5166/1: magician: add MAINTAINERS entry [ARM] fix pnx4008 build errors [ARM] Fix SMP booting with non-zero PHYS_OFFSET [ARM] 5185/1: Fix spi num_chipselect for lubbock [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach [ARM] Add support for arch/arm/mach-*/include and arch/arm/plat-*/include [ARM] Remove asm/hardware.h, use asm/arch/hardware.h instead [ARM] Eliminate useless includes of asm/mach-types.h [ARM] Fix circular include dependency with IRQ headers avr32: Use <mach/foo.h> instead of <asm/arch/foo.h> avr32: Introduce arch/avr32/mach-*/include/mach avr32: Move include/asm-avr32 to arch/avr32/include/asm [ARM] sa1100_wdt: use reset_status to remember watchdog reset status [ARM] pxa: introduce reset_status and clear_reset_status for driver's usage [ARM] pxa: introduce reset.h for reset specific header information
Diffstat (limited to 'arch/arm/mach-pxa/include/mach/i2c.h')
-rw-r--r--arch/arm/mach-pxa/include/mach/i2c.h77
1 files changed, 77 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/include/mach/i2c.h b/arch/arm/mach-pxa/include/mach/i2c.h
new file mode 100644
index 000000000000..80596b013443
--- /dev/null
+++ b/arch/arm/mach-pxa/include/mach/i2c.h
@@ -0,0 +1,77 @@
+/*
+ * 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;
+ int use_pio;
+};
+
+extern void pxa_set_i2c_info(struct i2c_pxa_platform_data *info);
+
+#ifdef CONFIG_PXA27x
+extern void pxa_set_i2c_power_info(struct i2c_pxa_platform_data *info);
+#endif
+
+#endif
OpenPOWER on IntegriCloud