drivers/mfd/intel-m10-bmc-core.c

1 // SPDX-License-Identifier: GPL-2.0
3  * Intel MAX 10 Board Management Controller chip - common code
5  * Copyright (C) 2018-2020 Intel Corporation. All rights reserved.
12 #include <linux/mfd/intel-m10-bmc.h>
18 	if (!m10bmc->info->handshake_sys_reg_nranges)  in m10bmc_fw_state_set()
21 	down_write(&m10bmc->bmcfw_lock);  in m10bmc_fw_state_set()
22 	m10bmc->bmcfw_state = new_state;  in m10bmc_fw_state_set()
23 	up_write(&m10bmc->bmcfw_lock);  in m10bmc_fw_state_set()
29  * handshake registers during a secure update.
33 	if (!m10bmc->info->handshake_sys_reg_nranges)  in m10bmc_reg_always_available()
36 	return !regmap_reg_in_ranges(offset, m10bmc->info->handshake_sys_reg_ranges,  in m10bmc_reg_always_available()
37 				     m10bmc->info->handshake_sys_reg_nranges);  in m10bmc_reg_always_available()
41  * m10bmc_handshake_reg_unavailable - Checks if reg access collides with secure update state
45  * handshake registers during a secure update erase and write phases.
47  * Context: @m10bmc->bmcfw_lock must be held.
51 	return m10bmc->bmcfw_state == M10BMC_FW_STATE_SEC_UPDATE_PREPARE ||  in m10bmc_handshake_reg_unavailable()
52 	       m10bmc->bmcfw_state == M10BMC_FW_STATE_SEC_UPDATE_WRITE;  in m10bmc_handshake_reg_unavailable()
63 	const struct m10bmc_csr_map *csr_map = m10bmc->info->csr_map;  in m10bmc_sys_read()
67 		return m10bmc_raw_read(m10bmc, csr_map->base + offset, val);  in m10bmc_sys_read()
69 	down_read(&m10bmc->bmcfw_lock);  in m10bmc_sys_read()
71 		ret = -EBUSY;	/* Reg not available during secure update */  in m10bmc_sys_read()
73 		ret = m10bmc_raw_read(m10bmc, csr_map->base + offset, val);  in m10bmc_sys_read()
74 	up_read(&m10bmc->bmcfw_lock);  in m10bmc_sys_read()
83 	const struct m10bmc_csr_map *csr_map = m10bmc->info->csr_map;  in m10bmc_sys_update_bits()
87 		return regmap_update_bits(m10bmc->regmap, csr_map->base + offset, msk, val);  in m10bmc_sys_update_bits()
89 	down_read(&m10bmc->bmcfw_lock);  in m10bmc_sys_update_bits()
91 		ret = -EBUSY;	/* Reg not available during secure update */  in m10bmc_sys_update_bits()
93 		ret = regmap_update_bits(m10bmc->regmap, csr_map->base + offset, msk, val);  in m10bmc_sys_update_bits()
94 	up_read(&m10bmc->bmcfw_lock);  in m10bmc_sys_update_bits()
107 	ret = m10bmc_sys_read(ddata, ddata->info->csr_map->build_version, &val);  in bmc_version_show()
122 	ret = m10bmc_sys_read(ddata, ddata->info->csr_map->fw_version, &val);  in bmcfw_version_show()
137 	ret = m10bmc_sys_read(ddata, ddata->info->csr_map->mac_low, &macaddr_low);  in mac_address_show()
141 	ret = m10bmc_sys_read(ddata, ddata->info->csr_map->mac_high, &macaddr_high);  in mac_address_show()
162 	ret = m10bmc_sys_read(ddata, ddata->info->csr_map->mac_high, &macaddr_high);  in mac_count_show()
192 	m10bmc->info = info;  in m10bmc_dev_init()
193 	dev_set_drvdata(m10bmc->dev, m10bmc);  in m10bmc_dev_init()
194 	init_rwsem(&m10bmc->bmcfw_lock);  in m10bmc_dev_init()
196 	ret = devm_mfd_add_devices(m10bmc->dev, PLATFORM_DEVID_AUTO,  in m10bmc_dev_init()
197 				   info->cells, info->n_cells,  in m10bmc_dev_init()
200 		dev_err(m10bmc->dev, "Failed to register sub-devices: %d\n", ret);  in m10bmc_dev_init()