diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mfd/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/mfd/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mfd/intel-m10-bmc-pmci.c | 219 |
3 files changed, 232 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index b6ab85831cde..2632ca2162de 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -2243,6 +2243,18 @@ config MFD_INTEL_M10_BMC_SPI additional drivers must be enabled in order to use the functionality of the device. +config MFD_INTEL_M10_BMC_PMCI + tristate "Intel MAX 10 Board Management Controller with PMCI" + depends on FPGA_DFL + select MFD_INTEL_M10_BMC_CORE + select REGMAP + help + Support for the Intel MAX 10 board management controller via PMCI. + + This driver provides common support for accessing the device, + additional drivers must be enabled in order to use the functionality + of the device. + config MFD_RSMU_I2C tristate "Renesas Synchronization Management Unit with I2C" depends on I2C && OF diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index b360b29150b5..81c30d7cf5d4 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -272,6 +272,7 @@ obj-$(CONFIG_MFD_SMPRO) += smpro-core.o obj-$(CONFIG_MFD_INTEL_M10_BMC_CORE) += intel-m10-bmc-core.o obj-$(CONFIG_MFD_INTEL_M10_BMC_SPI) += intel-m10-bmc-spi.o +obj-$(CONFIG_MFD_INTEL_M10_BMC_PMCI) += intel-m10-bmc-pmci.o obj-$(CONFIG_MFD_ATC260X) += atc260x-core.o obj-$(CONFIG_MFD_ATC260X_I2C) += atc260x-i2c.o diff --git a/drivers/mfd/intel-m10-bmc-pmci.c b/drivers/mfd/intel-m10-bmc-pmci.c new file mode 100644 index 000000000000..975019f644b5 --- /dev/null +++ b/drivers/mfd/intel-m10-bmc-pmci.c @@ -0,0 +1,219 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * MAX10 BMC Platform Management Component Interface (PMCI) based + * interface. + * + * Copyright (C) 2020-2023 Intel Corporation. + */ + +#include <linux/device.h> +#include <linux/dfl.h> +#include <linux/mfd/core.h> +#include <linux/mfd/intel-m10-bmc.h> +#include <linux/module.h> +#include <linux/regmap.h> + +struct m10bmc_pmci_device { + void __iomem *base; + struct intel_m10bmc m10bmc; +}; + +/* + * Intel FGPA indirect register access via hardware controller/bridge. + */ +#define INDIRECT_CMD_OFF 0 +#define INDIRECT_CMD_CLR 0 +#define INDIRECT_CMD_RD BIT(0) +#define INDIRECT_CMD_WR BIT(1) +#define INDIRECT_CMD_ACK BIT(2) + +#define INDIRECT_ADDR_OFF 0x4 +#define INDIRECT_RD_OFF 0x8 +#define INDIRECT_WR_OFF 0xc + +#define INDIRECT_INT_US 1 +#define INDIRECT_TIMEOUT_US 10000 + +struct indirect_ctx { + void __iomem *base; + struct device *dev; +}; + +static int indirect_clear_cmd(struct indirect_ctx *ctx) +{ + unsigned int cmd; + int ret; + + writel(INDIRECT_CMD_CLR, ctx->base + INDIRECT_CMD_OFF); + + ret = readl_poll_timeout(ctx->base + INDIRECT_CMD_OFF, cmd, + cmd == INDIRECT_CMD_CLR, + INDIRECT_INT_US, INDIRECT_TIMEOUT_US); + if (ret) + dev_err(ctx->dev, "timed out waiting clear cmd (residual cmd=0x%x)\n", cmd); + + return ret; +} + +static int indirect_reg_read(void *context, unsigned int reg, unsigned int *val) +{ + struct indirect_ctx *ctx = context; + unsigned int cmd, ack, tmpval; + int ret, ret2; + + cmd = readl(ctx->base + INDIRECT_CMD_OFF); + if (cmd != INDIRECT_CMD_CLR) + dev_warn(ctx->dev, "residual cmd 0x%x on read entry\n", cmd); + + writel(reg, ctx->base + INDIRECT_ADDR_OFF); + writel(INDIRECT_CMD_RD, ctx->base + INDIRECT_CMD_OFF); + + ret = readl_poll_timeout(ctx->base + INDIRECT_CMD_OFF, ack, + (ack & INDIRECT_CMD_ACK) == INDIRECT_CMD_ACK, + INDIRECT_INT_US, INDIRECT_TIMEOUT_US); + if (ret) + dev_err(ctx->dev, "read timed out on reg 0x%x ack 0x%x\n", reg, ack); + else + tmpval = readl(ctx->base + INDIRECT_RD_OFF); + + ret2 = indirect_clear_cmd(ctx); + + if (ret) + return ret; + if (ret2) + return ret2; + + *val = tmpval; + return 0; +} + +static int indirect_reg_write(void *context, unsigned int reg, unsigned int val) +{ + struct indirect_ctx *ctx = context; + unsigned int cmd, ack; + int ret, ret2; + + cmd = readl(ctx->base + INDIRECT_CMD_OFF); + if (cmd != INDIRECT_CMD_CLR) + dev_warn(ctx->dev, "residual cmd 0x%x on write entry\n", cmd); + + writel(val, ctx->base + INDIRECT_WR_OFF); + writel(reg, ctx->base + INDIRECT_ADDR_OFF); + writel(INDIRECT_CMD_WR, ctx->base + INDIRECT_CMD_OFF); + + ret = readl_poll_timeout(ctx->base + INDIRECT_CMD_OFF, ack, + (ack & INDIRECT_CMD_ACK) == INDIRECT_CMD_ACK, + INDIRECT_INT_US, INDIRECT_TIMEOUT_US); + if (ret) + dev_err(ctx->dev, "write timed out on reg 0x%x ack 0x%x\n", reg, ack); + + ret2 = indirect_clear_cmd(ctx); + + if (ret) + return ret; + return ret2; +} + +static const struct regmap_range m10bmc_pmci_regmap_range[] = { + regmap_reg_range(M10BMC_N6000_SYS_BASE, M10BMC_N6000_SYS_END), +}; + +static const struct regmap_access_table m10bmc_pmci_access_table = { + .yes_ranges = m10bmc_pmci_regmap_range, + .n_yes_ranges = ARRAY_SIZE(m10bmc_pmci_regmap_range), +}; + +static struct regmap_config m10bmc_pmci_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .wr_table = &m10bmc_pmci_access_table, + .rd_table = &m10bmc_pmci_access_table, + .reg_read = &indirect_reg_read, + .reg_write = &indirect_reg_write, + .max_register = M10BMC_N6000_SYS_END, +}; + +static struct mfd_cell m10bmc_pmci_n6000_bmc_subdevs[] = { + { .name = "n6000bmc-hwmon" }, +}; + +static const struct m10bmc_csr_map m10bmc_n6000_csr_map = { + .base = M10BMC_N6000_SYS_BASE, + .build_version = M10BMC_N6000_BUILD_VER, + .fw_version = NIOS2_N6000_FW_VERSION, + .mac_low = M10BMC_N6000_MAC_LOW, + .mac_high = M10BMC_N6000_MAC_HIGH, + .doorbell = M10BMC_N6000_DOORBELL, + .auth_result = M10BMC_N6000_AUTH_RESULT, + .bmc_prog_addr = M10BMC_N6000_BMC_PROG_ADDR, + .bmc_reh_addr = M10BMC_N6000_BMC_REH_ADDR, + .bmc_magic = M10BMC_N6000_BMC_PROG_MAGIC, + .sr_prog_addr = M10BMC_N6000_SR_PROG_ADDR, + .sr_reh_addr = M10BMC_N6000_SR_REH_ADDR, + .sr_magic = M10BMC_N6000_SR_PROG_MAGIC, + .pr_prog_addr = M10BMC_N6000_PR_PROG_ADDR, + .pr_reh_addr = M10BMC_N6000_PR_REH_ADDR, + .pr_magic = M10BMC_N6000_PR_PROG_MAGIC, + .rsu_update_counter = M10BMC_N6000_STAGING_FLASH_COUNT, +}; + +static const struct intel_m10bmc_platform_info m10bmc_pmci_n6000 = { + .cells = m10bmc_pmci_n6000_bmc_subdevs, + .n_cells = ARRAY_SIZE(m10bmc_pmci_n6000_bmc_subdevs), + .csr_map = &m10bmc_n6000_csr_map, +}; + +static int m10bmc_pmci_probe(struct dfl_device *ddev) +{ + struct device *dev = &ddev->dev; + struct m10bmc_pmci_device *pmci; + struct indirect_ctx *ctx; + + pmci = devm_kzalloc(dev, sizeof(*pmci), GFP_KERNEL); + if (!pmci) + return -ENOMEM; + + pmci->m10bmc.dev = dev; + + pmci->base = devm_ioremap_resource(dev, &ddev->mmio_res); + if (IS_ERR(pmci->base)) + return PTR_ERR(pmci->base); + + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->base = pmci->base + M10BMC_N6000_INDIRECT_BASE; + ctx->dev = dev; + indirect_clear_cmd(ctx); + pmci->m10bmc.regmap = devm_regmap_init(dev, NULL, ctx, &m10bmc_pmci_regmap_config); + + if (IS_ERR(pmci->m10bmc.regmap)) + return PTR_ERR(pmci->m10bmc.regmap); + + return m10bmc_dev_init(&pmci->m10bmc, &m10bmc_pmci_n6000); +} + +#define FME_FEATURE_ID_M10BMC_PMCI 0x12 + +static const struct dfl_device_id m10bmc_pmci_ids[] = { + { FME_ID, FME_FEATURE_ID_M10BMC_PMCI }, + { } +}; +MODULE_DEVICE_TABLE(dfl, m10bmc_pmci_ids); + +static struct dfl_driver m10bmc_pmci_driver = { + .drv = { + .name = "intel-m10-bmc", + .dev_groups = m10bmc_dev_groups, + }, + .id_table = m10bmc_pmci_ids, + .probe = m10bmc_pmci_probe, +}; + +module_dfl_driver(m10bmc_pmci_driver); + +MODULE_DESCRIPTION("MAX10 BMC PMCI-based interface"); +MODULE_AUTHOR("Intel Corporation"); +MODULE_LICENSE("GPL"); |