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https://github.com/freebsd/freebsd-src
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cbf7c81b60
First of all and unlike I2C, it's not the master that dictates how many bytes to read in block read operation. It's the device that informs the master how many bytes it's sending back. Thus, for ichsmb_bread() the count parameter is purely an output parameter. The code has been changed to reflect that. The sanity checking of the response length is now done once it (the first byte of the response) is received. While here, handling of ICH_HST_STA_FAILED status bit has been added. Plus some code style improvements and some new code comments in the vicinity of the changed code.
90 lines
3.6 KiB
C
90 lines
3.6 KiB
C
/*-
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* ichsmb_var.h
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*
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* Copyright (c) 2000 Whistle Communications, Inc.
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* All rights reserved.
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*
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* Subject to the following obligations and disclaimer of warranty, use and
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* redistribution of this software, in source or object code forms, with or
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* without modifications are expressly permitted by Whistle Communications;
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* provided, however, that:
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* 1. Any and all reproductions of the source or object code must include the
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* copyright notice above and the following disclaimer of warranties; and
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* 2. No rights are granted, in any manner or form, to use Whistle
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* Communications, Inc. trademarks, including the mark "WHISTLE
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* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
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* such appears in the above copyright notice or in the software.
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*
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* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
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* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
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* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
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* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
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* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
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* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
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* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
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* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
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* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* Author: Archie Cobbs <archie@freebsd.org>
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*/
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#ifndef _DEV_ICHSMB_ICHSMB_VAR_H
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#define _DEV_ICHSMB_ICHSMB_VAR_H
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#include "smbus_if.h"
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/* Per-device private info */
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struct ichsmb_softc {
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/* Device/bus stuff */
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device_t dev; /* this device */
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device_t smb; /* smb device */
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struct resource *io_res; /* i/o port resource */
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int io_rid; /* i/o port bus id */
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struct resource *irq_res; /* interrupt resource */
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int irq_rid; /* interrupt bus id */
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void *irq_handle; /* handle for interrupt code */
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/* Device state */
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int ich_cmd; /* ich command, or -1 */
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int smb_error; /* result of smb command */
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int block_count; /* count for block read/write */
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int block_index; /* index for block read/write */
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bool block_write; /* block write or block read */
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uint8_t block_data[32]; /* block read/write data */
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bool killed; /* killed current transfer */
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struct mtx mutex; /* device mutex */
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};
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typedef struct ichsmb_softc *sc_p;
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/* SMBus methods */
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extern smbus_callback_t ichsmb_callback;
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extern smbus_quick_t ichsmb_quick;
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extern smbus_sendb_t ichsmb_sendb;
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extern smbus_recvb_t ichsmb_recvb;
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extern smbus_writeb_t ichsmb_writeb;
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extern smbus_writew_t ichsmb_writew;
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extern smbus_readb_t ichsmb_readb;
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extern smbus_readw_t ichsmb_readw;
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extern smbus_pcall_t ichsmb_pcall;
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extern smbus_bwrite_t ichsmb_bwrite;
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extern smbus_bread_t ichsmb_bread;
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/* Other functions */
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extern void ichsmb_device_intr(void *cookie);
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extern void ichsmb_release_resources(sc_p sc);
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extern int ichsmb_probe(device_t dev);
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extern int ichsmb_attach(device_t dev);
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extern int ichsmb_detach(device_t dev);
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#endif /* _DEV_ICHSMB_ICHSMB_VAR_H */
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