From: Sonic Zhang <sonic.zhang@xxxxxxxxxx>
The ADI TWI peripheral is not binding to the Blackfin processor only.
The bits macros and structs should be put in the generic include header.
And update head file path in drivers accordingly.
Signed-off-by: Sonic Zhang <sonic.zhang@xxxxxxxxxx>
---
arch/blackfin/include/asm/bfin_twi.h | 126 +-----------------------------
arch/blackfin/kernel/debug-mmrs.c | 1 +
drivers/i2c/busses/i2c-bfin-twi.c | 4 +-
include/linux/i2c/bfin_twi.h | 145 +++++++++++++++++++++++++++++++++++
4 files changed, 149 insertions(+), 127 deletions(-)
create mode 100644 include/linux/i2c/bfin_twi.h
diff --git a/arch/blackfin/include/asm/bfin_twi.h b/arch/blackfin/include/asm/bfin_twi.h
index 90c3c00..34cc395 100644
--- a/arch/blackfin/include/asm/bfin_twi.h
+++ b/arch/blackfin/include/asm/bfin_twi.h
@@ -9,60 +9,7 @@
#ifndef __ASM_BFIN_TWI_H__
#define __ASM_BFIN_TWI_H__
-#include <linux/types.h>
-#include <linux/i2c.h>
-
-/*
- * All Blackfin system MMRs are padded to 32bits even if the register
- * itself is only 16bits. So use a helper macro to streamline this.
- */
-#define __BFP(m) u16 m; u16 __pad_##m
-
-/*
- * bfin twi registers layout
- */
-struct bfin_twi_regs {
- __BFP(clkdiv);
- __BFP(control);
- __BFP(slave_ctl);
- __BFP(slave_stat);
- __BFP(slave_addr);
- __BFP(master_ctl);
- __BFP(master_stat);
- __BFP(master_addr);
- __BFP(int_stat);
- __BFP(int_mask);
- __BFP(fifo_ctl);
- __BFP(fifo_stat);
- u32 __pad[20];
- __BFP(xmt_data8);
- __BFP(xmt_data16);
- __BFP(rcv_data8);
- __BFP(rcv_data16);
-};
-
-#undef __BFP
-
-struct bfin_twi_iface {
- int irq;
- spinlock_t lock;
- char read_write;
- u8 command;
- u8 *transPtr;
- int readNum;
- int writeNum;
- int cur_mode;
- int manual_stop;
- int result;
- struct i2c_adapter adap;
- struct completion complete;
- struct i2c_msg *pmsg;
- int msg_num;
- int cur_msg;
- u16 saved_clkdiv;
- u16 saved_control;
- struct bfin_twi_regs __iomem *regs_base;
-};
+#include <asm/blackfin.h>
#define DEFINE_TWI_REG(reg_name, reg) \
static inline u16 read_##reg_name(struct bfin_twi_iface *iface) \
@@ -113,75 +60,4 @@ static inline u16 read_RCV_DATA16(struct bfin_twi_iface *iface)
}
#endif
-
-/* ******************** TWO-WIRE INTERFACE (TWI) MASKS ***********************/
-/* TWI_CLKDIV Macros (Use: *pTWI_CLKDIV = CLKLOW(x)|CLKHI(y); ) */
-#define CLKLOW(x) ((x) & 0xFF) /* Periods Clock Is Held Low */
-#define CLKHI(y) (((y)&0xFF)<<0x8) /* Periods Before New Clock Low */
-
-/* TWI_PRESCALE Masks */
-#define PRESCALE 0x007F /* SCLKs Per Internal Time Reference (10MHz) */
-#define TWI_ENA 0x0080 /* TWI Enable */
-#define SCCB 0x0200 /* SCCB Compatibility Enable */
-
-/* TWI_SLAVE_CTL Masks */
-#define SEN 0x0001 /* Slave Enable */
-#define SADD_LEN 0x0002 /* Slave Address Length */
-#define STDVAL 0x0004 /* Slave Transmit Data Valid */
-#define NAK 0x0008 /* NAK/ACK* Generated At Conclusion Of Transfer */
-#define GEN 0x0010 /* General Call Address Matching Enabled */
-
-/* TWI_SLAVE_STAT Masks */
-#define SDIR 0x0001 /* Slave Transfer Direction (Transmit/Receive*) */
-#define GCALL 0x0002 /* General Call Indicator */
-
-/* TWI_MASTER_CTL Masks */
-#define MEN 0x0001 /* Master Mode Enable */
-#define MADD_LEN 0x0002 /* Master Address Length */
-#define MDIR 0x0004 /* Master Transmit Direction (RX/TX*) */
-#define FAST 0x0008 /* Use Fast Mode Timing Specs */
-#define STOP 0x0010 /* Issue Stop Condition */
-#define RSTART 0x0020 /* Repeat Start or Stop* At End Of Transfer */
-#define DCNT 0x3FC0 /* Data Bytes To Transfer */
-#define SDAOVR 0x4000 /* Serial Data Override */
-#define SCLOVR 0x8000 /* Serial Clock Override */
-
-/* TWI_MASTER_STAT Masks */
-#define MPROG 0x0001 /* Master Transfer In Progress */
-#define LOSTARB 0x0002 /* Lost Arbitration Indicator (Xfer Aborted) */
-#define ANAK 0x0004 /* Address Not Acknowledged */
-#define DNAK 0x0008 /* Data Not Acknowledged */
-#define BUFRDERR 0x0010 /* Buffer Read Error */
-#define BUFWRERR 0x0020 /* Buffer Write Error */
-#define SDASEN 0x0040 /* Serial Data Sense */
-#define SCLSEN 0x0080 /* Serial Clock Sense */
-#define BUSBUSY 0x0100 /* Bus Busy Indicator */
-
-/* TWI_INT_SRC and TWI_INT_ENABLE Masks */
-#define SINIT 0x0001 /* Slave Transfer Initiated */
-#define SCOMP 0x0002 /* Slave Transfer Complete */
-#define SERR 0x0004 /* Slave Transfer Error */
-#define SOVF 0x0008 /* Slave Overflow */
-#define MCOMP 0x0010 /* Master Transfer Complete */
-#define MERR 0x0020 /* Master Transfer Error */
-#define XMTSERV 0x0040 /* Transmit FIFO Service */
-#define RCVSERV 0x0080 /* Receive FIFO Service */
-
-/* TWI_FIFO_CTRL Masks */
-#define XMTFLUSH 0x0001 /* Transmit Buffer Flush */
-#define RCVFLUSH 0x0002 /* Receive Buffer Flush */
-#define XMTINTLEN 0x0004 /* Transmit Buffer Interrupt Length */
-#define RCVINTLEN 0x0008 /* Receive Buffer Interrupt Length */
-
-/* TWI_FIFO_STAT Masks */
-#define XMTSTAT 0x0003 /* Transmit FIFO Status */
-#define XMT_EMPTY 0x0000 /* Transmit FIFO Empty */
-#define XMT_HALF 0x0001 /* Transmit FIFO Has 1 Byte To Write */
-#define XMT_FULL 0x0003 /* Transmit FIFO Full (2 Bytes To Write) */
-
-#define RCVSTAT 0x000C /* Receive FIFO Status */
-#define RCV_EMPTY 0x0000 /* Receive FIFO Empty */
-#define RCV_HALF 0x0004 /* Receive FIFO Has 1 Byte To Read */
-#define RCV_FULL 0x000C /* Receive FIFO Full (2 Bytes To Read) */
-
#endif
diff --git a/arch/blackfin/kernel/debug-mmrs.c b/arch/blackfin/kernel/debug-mmrs.c
index 01232a1..947ad08 100644
--- a/arch/blackfin/kernel/debug-mmrs.c
+++ b/arch/blackfin/kernel/debug-mmrs.c
@@ -10,6 +10,7 @@
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/i2c/bfin_twi.h>
#include <asm/blackfin.h>
#include <asm/gpio.h>
diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c
index 3b9bd9a..fd0696e 100644
--- a/drivers/i2c/busses/i2c-bfin-twi.c
+++ b/drivers/i2c/busses/i2c-bfin-twi.c
@@ -21,10 +21,10 @@
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
+#include <linux/i2c/bfin_twi.h>
-#include <asm/blackfin.h>
-#include <asm/portmux.h>
#include <asm/irq.h>
+#include <asm/portmux.h>
#include <asm/bfin_twi.h>
/* SMBus mode*/
diff --git a/include/linux/i2c/bfin_twi.h b/include/linux/i2c/bfin_twi.h
new file mode 100644
index 0000000..135a4e0
--- /dev/null
+++ b/include/linux/i2c/bfin_twi.h
@@ -0,0 +1,145 @@
+/*
+ * i2c-bfin-twi.h - interface to ADI TWI controller
+ *
+ * Copyright 2005-2014 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __I2C_BFIN_TWI_H__
+#define __I2C_BFIN_TWI_H__
+
+#include <linux/types.h>
+#include <linux/i2c.h>
+
+/*
+ * ADI twi registers layout
+ */
+struct bfin_twi_regs {
+ u16 clkdiv;
+ u16 dummy1;
+ u16 control;
+ u16 dummy2;
+ u16 slave_ctl;
+ u16 dummy3;
+ u16 slave_stat;
+ u16 dummy4;
+ u16 slave_addr;
+ u16 dummy5;
+ u16 master_ctl;
+ u16 dummy6;
+ u16 master_stat;
+ u16 dummy7;
+ u16 master_addr;
+ u16 dummy8;
+ u16 int_stat;
+ u16 dummy9;
+ u16 int_mask;
+ u16 dummy10;
+ u16 fifo_ctl;
+ u16 dummy11;
+ u16 fifo_stat;
+ u16 dummy12;
+ u32 __pad[20];
+ u16 xmt_data8;
+ u16 dummy13;
+ u16 xmt_data16;
+ u16 dummy14;
+ u16 rcv_data8;
+ u16 dummy15;
+ u16 rcv_data16;
+ u16 dummy16;
+};
+
+struct bfin_twi_iface {
+ int irq;
+ spinlock_t lock;
+ char read_write;
+ u8 command;
+ u8 *transPtr;
+ int readNum;
+ int writeNum;
+ int cur_mode;
+ int manual_stop;
+ int result;
+ struct i2c_adapter adap;
+ struct completion complete;
+ struct i2c_msg *pmsg;
+ int msg_num;
+ int cur_msg;
+ u16 saved_clkdiv;
+ u16 saved_control;
+ struct bfin_twi_regs __iomem *regs_base;
+};
+
+/* ******************** TWO-WIRE INTERFACE (TWI) MASKS ********************/
+/* TWI_CLKDIV Macros (Use: *pTWI_CLKDIV = CLKLOW(x)|CLKHI(y); ) */
+#define CLKLOW(x) ((x) & 0xFF) /* Periods Clock Is Held Low */
+#define CLKHI(y) (((y)&0xFF)<<0x8) /* Periods Before New Clock Low */
+
+/* TWI_PRESCALE Masks */
+#define PRESCALE 0x007F /* SCLKs Per Internal Time Reference (10MHz) */
+#define TWI_ENA 0x0080 /* TWI Enable */
+#define SCCB 0x0200 /* SCCB Compatibility Enable */
+
+/* TWI_SLAVE_CTL Masks */
+#define SEN 0x0001 /* Slave Enable */
+#define SADD_LEN 0x0002 /* Slave Address Length */
+#define STDVAL 0x0004 /* Slave Transmit Data Valid */
+#define NAK 0x0008 /* NAK Generated At Conclusion Of Transfer */
+#define GEN 0x0010 /* General Call Address Matching Enabled */
+
+/* TWI_SLAVE_STAT Masks */
+#define SDIR 0x0001 /* Slave Transfer Direction (RX/TX*) */
+#define GCALL 0x0002 /* General Call Indicator */
+
+/* TWI_MASTER_CTL Masks */
+#define MEN 0x0001 /* Master Mode Enable */
+#define MADD_LEN 0x0002 /* Master Address Length */
+#define MDIR 0x0004 /* Master Transmit Direction (RX/TX*) */
+#define FAST 0x0008 /* Use Fast Mode Timing Specs */
+#define STOP 0x0010 /* Issue Stop Condition */
+#define RSTART 0x0020 /* Repeat Start or Stop* At End Of Transfer */
+#define DCNT 0x3FC0 /* Data Bytes To Transfer */
+#define SDAOVR 0x4000 /* Serial Data Override */
+#define SCLOVR 0x8000 /* Serial Clock Override */
+
+/* TWI_MASTER_STAT Masks */
+#define MPROG 0x0001 /* Master Transfer In Progress */
+#define LOSTARB 0x0002 /* Lost Arbitration Indicator (Xfer Aborted) */
+#define ANAK 0x0004 /* Address Not Acknowledged */
+#define DNAK 0x0008 /* Data Not Acknowledged */
+#define BUFRDERR 0x0010 /* Buffer Read Error */
+#define BUFWRERR 0x0020 /* Buffer Write Error */
+#define SDASEN 0x0040 /* Serial Data Sense */
+#define SCLSEN 0x0080 /* Serial Clock Sense */
+#define BUSBUSY 0x0100 /* Bus Busy Indicator */
+
+/* TWI_INT_SRC and TWI_INT_ENABLE Masks */
+#define SINIT 0x0001 /* Slave Transfer Initiated */
+#define SCOMP 0x0002 /* Slave Transfer Complete */
+#define SERR 0x0004 /* Slave Transfer Error */
+#define SOVF 0x0008 /* Slave Overflow */
+#define MCOMP 0x0010 /* Master Transfer Complete */
+#define MERR 0x0020 /* Master Transfer Error */
+#define XMTSERV 0x0040 /* Transmit FIFO Service */
+#define RCVSERV 0x0080 /* Receive FIFO Service */
+
+/* TWI_FIFO_CTRL Masks */
+#define XMTFLUSH 0x0001 /* Transmit Buffer Flush */
+#define RCVFLUSH 0x0002 /* Receive Buffer Flush */
+#define XMTINTLEN 0x0004 /* Transmit Buffer Interrupt Length */
+#define RCVINTLEN 0x0008 /* Receive Buffer Interrupt Length */
+
+/* TWI_FIFO_STAT Masks */
+#define XMTSTAT 0x0003 /* Transmit FIFO Status */
+#define XMT_EMPTY 0x0000 /* Transmit FIFO Empty */
+#define XMT_HALF 0x0001 /* Transmit FIFO Has 1 Byte To Write */
+#define XMT_FULL 0x0003 /* Transmit FIFO Full (2 Bytes To Write) */
+
+#define RCVSTAT 0x000C /* Receive FIFO Status */
+#define RCV_EMPTY 0x0000 /* Receive FIFO Empty */
+#define RCV_HALF 0x0004 /* Receive FIFO Has 1 Byte To Read */
+#define RCV_FULL 0x000C /* Receive FIFO Full (2 Bytes To Read) */
+
+#endif
--
1.8.2.3
--
To unsubscribe from this list: send the line "unsubscribe linux-i2c" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
