add i2c

diff --git a/arch/arm/mach-rk2818/include/mach/i2c.h b/arch/arm/mach-rk2818/include/mach/i2c.h
new file mode 100755 (executable)
index 0000000..18ce171
--- /dev/null
+++ b/arch/arm/mach-rk2818/include/mach/i2c.h
@@ -0,0 +1,85 @@
+/* arch/arm/mach-rk2818/include/mach/i2c.h
+ *
+ * Copyright (C) 2010 ROCKCHIP, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#ifndef __ASM_ARM_ARCH_I2C_H
+#define __ASM_ARM_ARCH_I2C_H
+
+/* master transmit */
+#define I2C_MTXR                (0x0000)
+/* master receive */
+#define I2C_MRXR                (0x0004)
+/* slave address */
+#define I2C_SADDR               (0x0010)
+/* interrupt enable control */
+#define I2C_IER                 (0x0014)
+#define I2C_IER_ARBITR_LOSE     (1<<7)
+#define I2C_IER_MRX_NEED_ACK    (1<<1)
+#define I2C_IER_MTX_RCVD_ACK    (1<<0)
+
+#define IRQ_MST_ENABLE         (I2C_IER_ARBITR_LOSE | \
+                                        I2C_IER_MRX_NEED_ACK | \
+                                        I2C_IER_MTX_RCVD_ACK)
+#define IRQ_ALL_DISABLE         (0x00)
+
+/* interrupt status, write 0 to clear */
+#define I2C_ISR                 (0x0018)
+#define I2C_ISR_ARBITR_LOSE     (1<<7)
+#define I2C_ISR_MRX_NEED_ACK    (1<<1)
+#define I2C_ISR_MTX_RCVD_ACK    (1<<0)
+
+/* stop/start/resume command, write 1 to set */
+#define I2C_LCMR                (0x001c)
+#define I2C_LCMR_RESUME         (1<<2)
+#define I2C_LCMR_STOP           (1<<1)
+#define I2C_LCMR_START          (1<<0)
+
+/* i2c core status */
+#define I2C_LSR                 (0x0020)
+#define I2C_LSR_RCV_NAK         (1<<1)
+#define I2C_LSR_RCV_ACK         (~(1<<1))
+#define I2C_LSR_BUSY            (1<<0)
+
+/* i2c config */
+#define I2C_CONR                (0x0024)
+#define I2C_CONR_NAK               (1<<4)
+#define I2C_CONR_ACK            (~(1<<4))
+#define I2C_CONR_MTX_MODE       (1<<3)
+#define I2C_CONR_MRX_MODE       (~(1<<3))
+#define I2C_CONR_MPORT_ENABLE   (1<<2)
+#define I2C_CONR_MPORT_DISABLE  (~(1<<2))
+
+/* i2c core config */
+#define I2C_OPR                 (0x0028)
+#define I2C_OPR_RESET_STATUS    (1<<7)
+#define I2C_OPR_CORE_ENABLE     (1<<6)
+
+#define I2CCDVR_REM_BITS        (0x03)
+#define I2CCDVR_REM_MAX         (1<<(I2CCDVR_REM_BITS))
+#define I2CCDVR_EXP_BITS        (0x03)
+#define I2CCDVR_EXP_MAX         (1<<(I2CCDVR_EXP_BITS))
+
+struct rk2818_i2c_platform_data {
+       int     bus_num;            /* i2c总线号 */
+       unsigned int    flags;      /* i2c总线标志 */
+       unsigned int    slave_addr; /* i2c从设备地址 */
+       unsigned long   scl_rate;    /* i2c总线频率，单位：hz */
+       char                    clk_id[16];  /* clk id */
+       /* gpio口配置 */
+       void    (*cfg_gpio)(struct platform_device *dev);
+};
+
+void rk2818_i2c_board_init(void);
+
+#endif