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// SPDX-License-Identifier: GPL-2.0
#include <linux/device.h>
#include "common.h"
static int occ_poll(struct occ *occ)
{
u16 checksum = occ->poll_cmd_data + 1;
u8 cmd[8];
/* big endian */
cmd[0] = 0; /* sequence number */
cmd[1] = 0; /* cmd type */
cmd[2] = 0; /* data length msb */
cmd[3] = 1; /* data length lsb */
cmd[4] = occ->poll_cmd_data; /* data */
cmd[5] = checksum >> 8; /* checksum msb */
cmd[6] = checksum & 0xFF; /* checksum lsb */
cmd[7] = 0;
return occ->send_cmd(occ, cmd);
}
int occ_setup(struct occ *occ, const char *name)
{
int rc;
rc = occ_poll(occ);
if (rc == -ESHUTDOWN) {
dev_info(occ->bus_dev, "host is not ready\n");
return rc;
} else if (rc < 0) {
dev_err(occ->bus_dev, "failed to get OCC poll response: %d\n",
rc);
return rc;
}
return 0;
}
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