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