mirror of https://gitee.com/openkylin/linux.git
620 lines
21 KiB
C
620 lines
21 KiB
C
/*
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Copyright (c), 2004-2005,2007-2010 Trident Microsystems, Inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of Trident Microsystems nor Hauppauge Computer Works
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nor the names of its contributors may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/*******************************************************************************
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* FILENAME: $Id: drx_dap_fasi.c,v 1.7 2009/12/28 14:36:21 carlo Exp $
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*
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* DESCRIPTION:
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* Part of DRX driver.
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* Data access protocol: Fast Access Sequential Interface (fasi)
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* Fast access, because of short addressing format (16 instead of 32 bits addr)
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* Sequential, because of I2C.
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* These functions know how the chip's memory and registers are to be accessed,
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* but nothing more.
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*
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* These functions should not need adapting to a new platform.
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*
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* USAGE:
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* -
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*
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* NOTES:
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*
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*
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*******************************************************************************/
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#include "drx_dap_fasi.h"
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#include "drx_driver.h" /* for drxbsp_hst_memcpy() */
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/*============================================================================*/
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/* Function prototypes */
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static int drxdap_fasi_write_block(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t addr, /* address of register/memory */
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u16 datasize, /* size of data */
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u8 *data, /* data to send */
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dr_xflags_t flags); /* special device flags */
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static int drxdap_fasi_read_block(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t addr, /* address of register/memory */
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u16 datasize, /* size of data */
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u8 *data, /* data to send */
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dr_xflags_t flags); /* special device flags */
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static int drxdap_fasi_write_reg8(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t addr, /* address of register */
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u8 data, /* data to write */
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dr_xflags_t flags); /* special device flags */
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static int drxdap_fasi_read_reg8(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t addr, /* address of register */
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u8 *data, /* buffer to receive data */
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dr_xflags_t flags); /* special device flags */
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static int drxdap_fasi_read_modify_write_reg8(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t waddr, /* address of register */
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dr_xaddr_t raddr, /* address to read back from */
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u8 datain, /* data to send */
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u8 *dataout); /* data to receive back */
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static int drxdap_fasi_write_reg16(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t addr, /* address of register */
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u16 data, /* data to write */
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dr_xflags_t flags); /* special device flags */
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static int drxdap_fasi_read_reg16(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t addr, /* address of register */
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u16 *data, /* buffer to receive data */
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dr_xflags_t flags); /* special device flags */
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static int drxdap_fasi_read_modify_write_reg16(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t waddr, /* address of register */
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dr_xaddr_t raddr, /* address to read back from */
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u16 datain, /* data to send */
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u16 *dataout); /* data to receive back */
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static int drxdap_fasi_write_reg32(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t addr, /* address of register */
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u32 data, /* data to write */
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dr_xflags_t flags); /* special device flags */
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static int drxdap_fasi_read_reg32(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t addr, /* address of register */
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u32 *data, /* buffer to receive data */
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dr_xflags_t flags); /* special device flags */
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static int drxdap_fasi_read_modify_write_reg32(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t waddr, /* address of register */
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dr_xaddr_t raddr, /* address to read back from */
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u32 datain, /* data to send */
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u32 *dataout); /* data to receive back */
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/* The version structure of this protocol implementation */
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char drx_dap_fasi_module_name[] = "FASI Data Access Protocol";
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char drx_dap_fasi_version_text[] = "";
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drx_version_t drx_dap_fasi_version = {
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DRX_MODULE_DAP, /**< type identifier of the module */
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drx_dap_fasi_module_name, /**< name or description of module */
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0, /**< major version number */
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0, /**< minor version number */
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0, /**< patch version number */
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drx_dap_fasi_version_text /**< version as text string */
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};
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/* The structure containing the protocol interface */
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drx_access_func_t drx_dap_fasi_funct_g = {
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&drx_dap_fasi_version,
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drxdap_fasi_write_block, /* Supported */
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drxdap_fasi_read_block, /* Supported */
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drxdap_fasi_write_reg8, /* Not supported */
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drxdap_fasi_read_reg8, /* Not supported */
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drxdap_fasi_read_modify_write_reg8, /* Not supported */
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drxdap_fasi_write_reg16, /* Supported */
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drxdap_fasi_read_reg16, /* Supported */
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drxdap_fasi_read_modify_write_reg16, /* Supported */
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drxdap_fasi_write_reg32, /* Supported */
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drxdap_fasi_read_reg32, /* Supported */
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drxdap_fasi_read_modify_write_reg32 /* Not supported */
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};
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/*============================================================================*/
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/* Functions not supported by protocol*/
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static int drxdap_fasi_write_reg8(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t addr, /* address of register */
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u8 data, /* data to write */
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dr_xflags_t flags)
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{ /* special device flags */
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return DRX_STS_ERROR;
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}
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static int drxdap_fasi_read_reg8(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t addr, /* address of register */
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u8 *data, /* buffer to receive data */
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dr_xflags_t flags)
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{ /* special device flags */
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return DRX_STS_ERROR;
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}
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static int drxdap_fasi_read_modify_write_reg8(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t waddr, /* address of register */
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dr_xaddr_t raddr, /* address to read back from */
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u8 datain, /* data to send */
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u8 *dataout)
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{ /* data to receive back */
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return DRX_STS_ERROR;
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}
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static int drxdap_fasi_read_modify_write_reg32(struct i2c_device_addr *dev_addr, /* address of I2C device */
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dr_xaddr_t waddr, /* address of register */
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dr_xaddr_t raddr, /* address to read back from */
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u32 datain, /* data to send */
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u32 *dataout)
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{ /* data to receive back */
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return DRX_STS_ERROR;
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}
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/*============================================================================*/
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/******************************
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*
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* int drxdap_fasi_read_block (
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* struct i2c_device_addr *dev_addr, -- address of I2C device
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* dr_xaddr_t addr, -- address of chip register/memory
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* u16 datasize, -- number of bytes to read
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* u8 *data, -- data to receive
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* dr_xflags_t flags) -- special device flags
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*
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* Read block data from chip address. Because the chip is word oriented,
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* the number of bytes to read must be even.
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*
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* Make sure that the buffer to receive the data is large enough.
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*
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* Although this function expects an even number of bytes, it is still byte
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* oriented, and the data read back is NOT translated to the endianness of
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* the target platform.
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*
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* Output:
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* - DRX_STS_OK if reading was successful
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* in that case: data read is in *data.
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* - DRX_STS_ERROR if anything went wrong
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*
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******************************/
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static int drxdap_fasi_read_block(struct i2c_device_addr *dev_addr,
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dr_xaddr_t addr,
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u16 datasize,
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u8 *data, dr_xflags_t flags)
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{
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u8 buf[4];
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u16 bufx;
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int rc;
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u16 overhead_size = 0;
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/* Check parameters ******************************************************* */
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if (dev_addr == NULL) {
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return DRX_STS_INVALID_ARG;
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}
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overhead_size = (IS_I2C_10BIT(dev_addr->i2c_addr) ? 2 : 1) +
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(DRXDAP_FASI_LONG_FORMAT(addr) ? 4 : 2);
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if ((DRXDAP_FASI_OFFSET_TOO_LARGE(addr)) ||
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((!(DRXDAPFASI_LONG_ADDR_ALLOWED)) &&
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DRXDAP_FASI_LONG_FORMAT(addr)) ||
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(overhead_size > (DRXDAP_MAX_WCHUNKSIZE)) ||
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((datasize != 0) && (data == NULL)) || ((datasize & 1) == 1)) {
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return DRX_STS_INVALID_ARG;
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}
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/* ReadModifyWrite & mode flag bits are not allowed */
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flags &= (~DRXDAP_FASI_RMW & ~DRXDAP_FASI_MODEFLAGS);
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#if DRXDAP_SINGLE_MASTER
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flags |= DRXDAP_FASI_SINGLE_MASTER;
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#endif
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/* Read block from I2C **************************************************** */
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do {
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u16 todo = (datasize < DRXDAP_MAX_RCHUNKSIZE ?
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datasize : DRXDAP_MAX_RCHUNKSIZE);
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bufx = 0;
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addr &= ~DRXDAP_FASI_FLAGS;
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addr |= flags;
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#if ((DRXDAPFASI_LONG_ADDR_ALLOWED == 1) && \
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(DRXDAPFASI_SHORT_ADDR_ALLOWED == 1))
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/* short format address preferred but long format otherwise */
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if (DRXDAP_FASI_LONG_FORMAT(addr)) {
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#endif
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#if (DRXDAPFASI_LONG_ADDR_ALLOWED == 1)
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buf[bufx++] = (u8) (((addr << 1) & 0xFF) | 0x01);
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buf[bufx++] = (u8) ((addr >> 16) & 0xFF);
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buf[bufx++] = (u8) ((addr >> 24) & 0xFF);
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buf[bufx++] = (u8) ((addr >> 7) & 0xFF);
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#endif
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#if ((DRXDAPFASI_LONG_ADDR_ALLOWED == 1) && \
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(DRXDAPFASI_SHORT_ADDR_ALLOWED == 1))
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} else {
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#endif
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#if (DRXDAPFASI_SHORT_ADDR_ALLOWED == 1)
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buf[bufx++] = (u8) ((addr << 1) & 0xFF);
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buf[bufx++] =
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(u8) (((addr >> 16) & 0x0F) |
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((addr >> 18) & 0xF0));
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#endif
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#if ((DRXDAPFASI_LONG_ADDR_ALLOWED == 1) && \
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(DRXDAPFASI_SHORT_ADDR_ALLOWED == 1))
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}
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#endif
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#if DRXDAP_SINGLE_MASTER
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/*
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* In single master mode, split the read and write actions.
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* No special action is needed for write chunks here.
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*/
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rc = drxbsp_i2c_write_read(dev_addr, bufx, buf, 0, 0, 0);
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if (rc == DRX_STS_OK) {
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rc = drxbsp_i2c_write_read(0, 0, 0, dev_addr, todo, data);
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}
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#else
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/* In multi master mode, do everything in one RW action */
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rc = drxbsp_i2c_write_read(dev_addr, bufx, buf, dev_addr, todo,
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data);
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#endif
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data += todo;
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addr += (todo >> 1);
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datasize -= todo;
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} while (datasize && rc == DRX_STS_OK);
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return rc;
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}
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/******************************
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*
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* int drxdap_fasi_read_modify_write_reg16 (
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* struct i2c_device_addr *dev_addr, -- address of I2C device
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* dr_xaddr_t waddr, -- address of chip register/memory
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* dr_xaddr_t raddr, -- chip address to read back from
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* u16 wdata, -- data to send
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* u16 *rdata) -- data to receive back
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*
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* Write 16-bit data, then read back the original contents of that location.
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* Requires long addressing format to be allowed.
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*
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* Before sending data, the data is converted to little endian. The
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* data received back is converted back to the target platform's endianness.
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*
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* WARNING: This function is only guaranteed to work if there is one
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* master on the I2C bus.
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*
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* Output:
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* - DRX_STS_OK if reading was successful
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* in that case: read back data is at *rdata
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* - DRX_STS_ERROR if anything went wrong
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*
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******************************/
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static int drxdap_fasi_read_modify_write_reg16(struct i2c_device_addr *dev_addr,
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dr_xaddr_t waddr,
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dr_xaddr_t raddr,
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u16 wdata, u16 *rdata)
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{
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int rc = DRX_STS_ERROR;
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#if (DRXDAPFASI_LONG_ADDR_ALLOWED == 1)
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if (rdata == NULL) {
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return DRX_STS_INVALID_ARG;
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}
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rc = drxdap_fasi_write_reg16(dev_addr, waddr, wdata, DRXDAP_FASI_RMW);
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if (rc == DRX_STS_OK) {
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rc = drxdap_fasi_read_reg16(dev_addr, raddr, rdata, 0);
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}
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#endif
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return rc;
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}
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/******************************
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*
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* int drxdap_fasi_read_reg16 (
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* struct i2c_device_addr *dev_addr, -- address of I2C device
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* dr_xaddr_t addr, -- address of chip register/memory
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* u16 *data, -- data to receive
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* dr_xflags_t flags) -- special device flags
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*
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* Read one 16-bit register or memory location. The data received back is
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* converted back to the target platform's endianness.
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*
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* Output:
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* - DRX_STS_OK if reading was successful
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* in that case: read data is at *data
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* - DRX_STS_ERROR if anything went wrong
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*
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******************************/
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static int drxdap_fasi_read_reg16(struct i2c_device_addr *dev_addr,
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dr_xaddr_t addr,
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u16 *data, dr_xflags_t flags)
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{
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u8 buf[sizeof(*data)];
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int rc;
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if (!data) {
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return DRX_STS_INVALID_ARG;
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}
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rc = drxdap_fasi_read_block(dev_addr, addr, sizeof(*data), buf, flags);
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*data = buf[0] + (((u16) buf[1]) << 8);
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return rc;
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}
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/******************************
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*
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* int drxdap_fasi_read_reg32 (
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* struct i2c_device_addr *dev_addr, -- address of I2C device
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* dr_xaddr_t addr, -- address of chip register/memory
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* u32 *data, -- data to receive
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* dr_xflags_t flags) -- special device flags
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*
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* Read one 32-bit register or memory location. The data received back is
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* converted back to the target platform's endianness.
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*
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* Output:
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* - DRX_STS_OK if reading was successful
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* in that case: read data is at *data
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* - DRX_STS_ERROR if anything went wrong
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*
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******************************/
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static int drxdap_fasi_read_reg32(struct i2c_device_addr *dev_addr,
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dr_xaddr_t addr,
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u32 *data, dr_xflags_t flags)
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{
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u8 buf[sizeof(*data)];
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int rc;
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if (!data) {
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return DRX_STS_INVALID_ARG;
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}
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rc = drxdap_fasi_read_block(dev_addr, addr, sizeof(*data), buf, flags);
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*data = (((u32) buf[0]) << 0) +
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(((u32) buf[1]) << 8) +
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(((u32) buf[2]) << 16) + (((u32) buf[3]) << 24);
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return rc;
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}
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/******************************
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*
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* int drxdap_fasi_write_block (
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* struct i2c_device_addr *dev_addr, -- address of I2C device
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* dr_xaddr_t addr, -- address of chip register/memory
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* u16 datasize, -- number of bytes to read
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* u8 *data, -- data to receive
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* dr_xflags_t flags) -- special device flags
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*
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* Write block data to chip address. Because the chip is word oriented,
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* the number of bytes to write must be even.
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*
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* Although this function expects an even number of bytes, it is still byte
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* oriented, and the data being written is NOT translated from the endianness of
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* the target platform.
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*
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* Output:
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* - DRX_STS_OK if writing was successful
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* - DRX_STS_ERROR if anything went wrong
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*
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******************************/
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static int drxdap_fasi_write_block(struct i2c_device_addr *dev_addr,
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dr_xaddr_t addr,
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u16 datasize,
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u8 *data, dr_xflags_t flags)
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{
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u8 buf[DRXDAP_MAX_WCHUNKSIZE];
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int st = DRX_STS_ERROR;
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int first_err = DRX_STS_OK;
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u16 overhead_size = 0;
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u16 block_size = 0;
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/* Check parameters ******************************************************* */
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if (dev_addr == NULL) {
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return DRX_STS_INVALID_ARG;
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}
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overhead_size = (IS_I2C_10BIT(dev_addr->i2c_addr) ? 2 : 1) +
|
|
(DRXDAP_FASI_LONG_FORMAT(addr) ? 4 : 2);
|
|
|
|
if ((DRXDAP_FASI_OFFSET_TOO_LARGE(addr)) ||
|
|
((!(DRXDAPFASI_LONG_ADDR_ALLOWED)) &&
|
|
DRXDAP_FASI_LONG_FORMAT(addr)) ||
|
|
(overhead_size > (DRXDAP_MAX_WCHUNKSIZE)) ||
|
|
((datasize != 0) && (data == NULL)) || ((datasize & 1) == 1)) {
|
|
return DRX_STS_INVALID_ARG;
|
|
}
|
|
|
|
flags &= DRXDAP_FASI_FLAGS;
|
|
flags &= ~DRXDAP_FASI_MODEFLAGS;
|
|
#if DRXDAP_SINGLE_MASTER
|
|
flags |= DRXDAP_FASI_SINGLE_MASTER;
|
|
#endif
|
|
|
|
/* Write block to I2C ***************************************************** */
|
|
block_size = ((DRXDAP_MAX_WCHUNKSIZE) - overhead_size) & ~1;
|
|
do {
|
|
u16 todo = 0;
|
|
u16 bufx = 0;
|
|
|
|
/* Buffer device address */
|
|
addr &= ~DRXDAP_FASI_FLAGS;
|
|
addr |= flags;
|
|
#if (((DRXDAPFASI_LONG_ADDR_ALLOWED) == 1) && \
|
|
((DRXDAPFASI_SHORT_ADDR_ALLOWED) == 1))
|
|
/* short format address preferred but long format otherwise */
|
|
if (DRXDAP_FASI_LONG_FORMAT(addr)) {
|
|
#endif
|
|
#if ((DRXDAPFASI_LONG_ADDR_ALLOWED) == 1)
|
|
buf[bufx++] = (u8) (((addr << 1) & 0xFF) | 0x01);
|
|
buf[bufx++] = (u8) ((addr >> 16) & 0xFF);
|
|
buf[bufx++] = (u8) ((addr >> 24) & 0xFF);
|
|
buf[bufx++] = (u8) ((addr >> 7) & 0xFF);
|
|
#endif
|
|
#if (((DRXDAPFASI_LONG_ADDR_ALLOWED) == 1) && \
|
|
((DRXDAPFASI_SHORT_ADDR_ALLOWED) == 1))
|
|
} else {
|
|
#endif
|
|
#if ((DRXDAPFASI_SHORT_ADDR_ALLOWED) == 1)
|
|
buf[bufx++] = (u8) ((addr << 1) & 0xFF);
|
|
buf[bufx++] =
|
|
(u8) (((addr >> 16) & 0x0F) |
|
|
((addr >> 18) & 0xF0));
|
|
#endif
|
|
#if (((DRXDAPFASI_LONG_ADDR_ALLOWED) == 1) && \
|
|
((DRXDAPFASI_SHORT_ADDR_ALLOWED) == 1))
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
In single master mode block_size can be 0. In such a case this I2C
|
|
sequense will be visible: (1) write address {i2c addr,
|
|
4 bytes chip address} (2) write data {i2c addr, 4 bytes data }
|
|
(3) write address (4) write data etc...
|
|
Addres must be rewriten because HI is reset after data transport and
|
|
expects an address.
|
|
*/
|
|
todo = (block_size < datasize ? block_size : datasize);
|
|
if (todo == 0) {
|
|
u16 overhead_sizeI2cAddr = 0;
|
|
u16 data_block_size = 0;
|
|
|
|
overhead_sizeI2cAddr =
|
|
(IS_I2C_10BIT(dev_addr->i2c_addr) ? 2 : 1);
|
|
data_block_size =
|
|
(DRXDAP_MAX_WCHUNKSIZE - overhead_sizeI2cAddr) & ~1;
|
|
|
|
/* write device address */
|
|
st = drxbsp_i2c_write_read(dev_addr,
|
|
(u16) (bufx),
|
|
buf,
|
|
(struct i2c_device_addr *)(NULL),
|
|
0, (u8 *)(NULL));
|
|
|
|
if ((st != DRX_STS_OK) && (first_err == DRX_STS_OK)) {
|
|
/* at the end, return the first error encountered */
|
|
first_err = st;
|
|
}
|
|
bufx = 0;
|
|
todo =
|
|
(data_block_size <
|
|
datasize ? data_block_size : datasize);
|
|
}
|
|
drxbsp_hst_memcpy(&buf[bufx], data, todo);
|
|
/* write (address if can do and) data */
|
|
st = drxbsp_i2c_write_read(dev_addr,
|
|
(u16) (bufx + todo),
|
|
buf,
|
|
(struct i2c_device_addr *)(NULL),
|
|
0, (u8 *)(NULL));
|
|
|
|
if ((st != DRX_STS_OK) && (first_err == DRX_STS_OK)) {
|
|
/* at the end, return the first error encountered */
|
|
first_err = st;
|
|
}
|
|
datasize -= todo;
|
|
data += todo;
|
|
addr += (todo >> 1);
|
|
} while (datasize);
|
|
|
|
return first_err;
|
|
}
|
|
|
|
/******************************
|
|
*
|
|
* int drxdap_fasi_write_reg16 (
|
|
* struct i2c_device_addr *dev_addr, -- address of I2C device
|
|
* dr_xaddr_t addr, -- address of chip register/memory
|
|
* u16 data, -- data to send
|
|
* dr_xflags_t flags) -- special device flags
|
|
*
|
|
* Write one 16-bit register or memory location. The data being written is
|
|
* converted from the target platform's endianness to little endian.
|
|
*
|
|
* Output:
|
|
* - DRX_STS_OK if writing was successful
|
|
* - DRX_STS_ERROR if anything went wrong
|
|
*
|
|
******************************/
|
|
|
|
static int drxdap_fasi_write_reg16(struct i2c_device_addr *dev_addr,
|
|
dr_xaddr_t addr,
|
|
u16 data, dr_xflags_t flags)
|
|
{
|
|
u8 buf[sizeof(data)];
|
|
|
|
buf[0] = (u8) ((data >> 0) & 0xFF);
|
|
buf[1] = (u8) ((data >> 8) & 0xFF);
|
|
|
|
return drxdap_fasi_write_block(dev_addr, addr, sizeof(data), buf, flags);
|
|
}
|
|
|
|
/******************************
|
|
*
|
|
* int drxdap_fasi_write_reg32 (
|
|
* struct i2c_device_addr *dev_addr, -- address of I2C device
|
|
* dr_xaddr_t addr, -- address of chip register/memory
|
|
* u32 data, -- data to send
|
|
* dr_xflags_t flags) -- special device flags
|
|
*
|
|
* Write one 32-bit register or memory location. The data being written is
|
|
* converted from the target platform's endianness to little endian.
|
|
*
|
|
* Output:
|
|
* - DRX_STS_OK if writing was successful
|
|
* - DRX_STS_ERROR if anything went wrong
|
|
*
|
|
******************************/
|
|
|
|
static int drxdap_fasi_write_reg32(struct i2c_device_addr *dev_addr,
|
|
dr_xaddr_t addr,
|
|
u32 data, dr_xflags_t flags)
|
|
{
|
|
u8 buf[sizeof(data)];
|
|
|
|
buf[0] = (u8) ((data >> 0) & 0xFF);
|
|
buf[1] = (u8) ((data >> 8) & 0xFF);
|
|
buf[2] = (u8) ((data >> 16) & 0xFF);
|
|
buf[3] = (u8) ((data >> 24) & 0xFF);
|
|
|
|
return drxdap_fasi_write_block(dev_addr, addr, sizeof(data), buf, flags);
|
|
}
|