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// SPDX-License-Identifier: GPL-2.0+
// Copyright IBM Corp 2019
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/fsi-occ.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include "common.h"
struct p9_sbe_occ {
struct occ occ;
struct device *sbe;
};
#define to_p9_sbe_occ(x) container_of((x), struct p9_sbe_occ, occ)
static int p9_sbe_occ_send_cmd(struct occ *occ, u8 *cmd)
{
struct occ_response *resp = &occ->resp;
struct p9_sbe_occ *ctx = to_p9_sbe_occ(occ);
size_t resp_len = sizeof(*resp);
int rc;
rc = fsi_occ_submit(ctx->sbe, cmd, 8, resp, &resp_len);
if (rc < 0)
return rc;
switch (resp->return_status) {
case OCC_RESP_CMD_IN_PRG:
rc = -ETIMEDOUT;
break;
case OCC_RESP_SUCCESS:
rc = 0;
break;
case OCC_RESP_CMD_INVAL:
case OCC_RESP_CMD_LEN_INVAL:
case OCC_RESP_DATA_INVAL:
case OCC_RESP_CHKSUM_ERR:
rc = -EINVAL;
break;
case OCC_RESP_INT_ERR:
case OCC_RESP_BAD_STATE:
case OCC_RESP_CRIT_EXCEPT:
case OCC_RESP_CRIT_INIT:
case OCC_RESP_CRIT_WATCHDOG:
case OCC_RESP_CRIT_OCB:
case OCC_RESP_CRIT_HW:
rc = -EREMOTEIO;
break;
default:
rc = -EPROTO;
}
return rc;
}
static int p9_sbe_occ_probe(struct platform_device *pdev)
{
int rc;
struct occ *occ;
struct p9_sbe_occ *ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx),
GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->sbe = pdev->dev.parent;
occ = &ctx->occ;
occ->bus_dev = &pdev->dev;
platform_set_drvdata(pdev, occ);
occ->powr_sample_time_us = 500;
occ->poll_cmd_data = 0x20; /* P9 OCC poll data */
occ->send_cmd = p9_sbe_occ_send_cmd;
rc = occ_setup(occ, "p9_occ");
if (rc == -ESHUTDOWN)
rc = -ENODEV; /* Host is shutdown, don't spew errors */
return rc;
}
static int p9_sbe_occ_remove(struct platform_device *pdev)
{
struct occ *occ = platform_get_drvdata(pdev);
struct p9_sbe_occ *ctx = to_p9_sbe_occ(occ);
ctx->sbe = NULL;
occ_shutdown(occ);
return 0;
}
static struct platform_driver p9_sbe_occ_driver = {
.driver = {
.name = "occ-hwmon",
},
.probe = p9_sbe_occ_probe,
.remove = p9_sbe_occ_remove,
};
module_platform_driver(p9_sbe_occ_driver);
MODULE_AUTHOR("Eddie James <eajames@linux.ibm.com>");
MODULE_DESCRIPTION("BMC P9 OCC hwmon driver");
MODULE_LICENSE("GPL");
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