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5f60d5f6bb
asm/unaligned.h is always an include of asm-generic/unaligned.h; might as well move that thing to linux/unaligned.h and include that - there's nothing arch-specific in that header. auto-generated by the following: for i in `git grep -l -w asm/unaligned.h`; do sed -i -e "s/asm\/unaligned.h/linux\/unaligned.h/" $i done for i in `git grep -l -w asm-generic/unaligned.h`; do sed -i -e "s/asm-generic\/unaligned.h/linux\/unaligned.h/" $i done git mv include/asm-generic/unaligned.h include/linux/unaligned.h git mv tools/include/asm-generic/unaligned.h tools/include/linux/unaligned.h sed -i -e "/unaligned.h/d" include/asm-generic/Kbuild sed -i -e "s/__ASM_GENERIC/__LINUX/" include/linux/unaligned.h tools/include/linux/unaligned.h
135 lines
3 KiB
C
135 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2019 Google LLC
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*/
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#include <linux/errno.h>
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#include <linux/export.h>
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#include <linux/platform_data/wilco-ec.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/unaligned.h>
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/* Operation code; what the EC should do with the property */
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enum ec_property_op {
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EC_OP_GET = 0,
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EC_OP_SET = 1,
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};
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struct ec_property_request {
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u8 op; /* One of enum ec_property_op */
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u8 property_id[4]; /* The 32 bit PID is stored Little Endian */
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u8 length;
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u8 data[WILCO_EC_PROPERTY_MAX_SIZE];
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} __packed;
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struct ec_property_response {
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u8 reserved[2];
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u8 op; /* One of enum ec_property_op */
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u8 property_id[4]; /* The 32 bit PID is stored Little Endian */
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u8 length;
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u8 data[WILCO_EC_PROPERTY_MAX_SIZE];
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} __packed;
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static int send_property_msg(struct wilco_ec_device *ec,
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struct ec_property_request *rq,
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struct ec_property_response *rs)
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{
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struct wilco_ec_message ec_msg;
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int ret;
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memset(&ec_msg, 0, sizeof(ec_msg));
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ec_msg.type = WILCO_EC_MSG_PROPERTY;
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ec_msg.request_data = rq;
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ec_msg.request_size = sizeof(*rq);
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ec_msg.response_data = rs;
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ec_msg.response_size = sizeof(*rs);
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ret = wilco_ec_mailbox(ec, &ec_msg);
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if (ret < 0)
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return ret;
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if (rs->op != rq->op)
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return -EBADMSG;
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if (memcmp(rq->property_id, rs->property_id, sizeof(rs->property_id)))
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return -EBADMSG;
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return 0;
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}
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int wilco_ec_get_property(struct wilco_ec_device *ec,
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struct wilco_ec_property_msg *prop_msg)
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{
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struct ec_property_request rq;
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struct ec_property_response rs;
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int ret;
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memset(&rq, 0, sizeof(rq));
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rq.op = EC_OP_GET;
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put_unaligned_le32(prop_msg->property_id, rq.property_id);
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ret = send_property_msg(ec, &rq, &rs);
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if (ret < 0)
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return ret;
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prop_msg->length = rs.length;
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memcpy(prop_msg->data, rs.data, rs.length);
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return 0;
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}
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EXPORT_SYMBOL_GPL(wilco_ec_get_property);
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int wilco_ec_set_property(struct wilco_ec_device *ec,
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struct wilco_ec_property_msg *prop_msg)
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{
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struct ec_property_request rq;
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struct ec_property_response rs;
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int ret;
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memset(&rq, 0, sizeof(rq));
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rq.op = EC_OP_SET;
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put_unaligned_le32(prop_msg->property_id, rq.property_id);
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rq.length = prop_msg->length;
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memcpy(rq.data, prop_msg->data, prop_msg->length);
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ret = send_property_msg(ec, &rq, &rs);
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if (ret < 0)
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return ret;
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if (rs.length != prop_msg->length)
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return -EBADMSG;
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return 0;
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}
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EXPORT_SYMBOL_GPL(wilco_ec_set_property);
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int wilco_ec_get_byte_property(struct wilco_ec_device *ec, u32 property_id,
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u8 *val)
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{
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struct wilco_ec_property_msg msg;
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int ret;
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msg.property_id = property_id;
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ret = wilco_ec_get_property(ec, &msg);
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if (ret < 0)
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return ret;
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if (msg.length != 1)
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return -EBADMSG;
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*val = msg.data[0];
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return 0;
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}
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EXPORT_SYMBOL_GPL(wilco_ec_get_byte_property);
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int wilco_ec_set_byte_property(struct wilco_ec_device *ec, u32 property_id,
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u8 val)
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{
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struct wilco_ec_property_msg msg;
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msg.property_id = property_id;
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msg.data[0] = val;
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msg.length = 1;
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return wilco_ec_set_property(ec, &msg);
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}
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EXPORT_SYMBOL_GPL(wilco_ec_set_byte_property);
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