gpio.c

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <intelblocks/gpio.h>
#include <intelblocks/pcr.h>
#include <soc/pcr_ids.h>
#include <soc/pmc.h>
 
static const struct reset_mapping rst_map[] = {
        { .logical = PAD_CFG0_LOGICAL_RESET_RSMRST, .chipset = 0U << 30 },
        { .logical = PAD_CFG0_LOGICAL_RESET_DEEP, .chipset = 1U << 30 },
        { .logical = PAD_CFG0_LOGICAL_RESET_PLTRST, .chipset = 2U << 30 },
};
 
static const struct reset_mapping rst_map_com0[] = {
        { .logical = PAD_CFG0_LOGICAL_RESET_PWROK, .chipset = 0U << 30 },
        { .logical = PAD_CFG0_LOGICAL_RESET_DEEP, .chipset = 1U << 30 },
        { .logical = PAD_CFG0_LOGICAL_RESET_PLTRST, .chipset = 2U << 30 },
        { .logical = PAD_CFG0_LOGICAL_RESET_RSMRST, .chipset = 3U << 30 },
};
 
/*
 * The GPIO driver for Icelake on Windows/Linux expects 32 GPIOs per pad
 * group, regardless of whether or not there is a physical pad for each
 * exposed GPIO number.
 *
 * This results in the OS having a sparse GPIO map, and devices that need
 * to export an ACPI GPIO must use the OS expected number.
 *
 * Not all pins are usable as GPIO and those groups do not have a pad base.
 *
 * This layout matches the Linux kernel pinctrl map for CNL-LP at:
 * linux/drivers/pinctrl/intel/pinctrl-icelake.c
 */
static const struct pad_group icl_community0_groups[] = {
        INTEL_GPP_BASE(GPP_G0, GPP_G0, GPP_G7, 0),              /* GPP_G */
        INTEL_GPP_BASE(GPP_G0, GPP_B0, GPP_B23, 32),            /* GPP_B */
        INTEL_GPP(GPP_G0, GPIO_RSVD_0, GPIO_RSVD_1),
        INTEL_GPP_BASE(GPP_G0, GPP_A0, GPP_A23, 64),            /* GPP_A */
};
 
static const struct pad_group icl_community1_groups[] = {
        INTEL_GPP_BASE(GPP_H0, GPP_H0, GPP_H23, 96),            /* GPP_H */
        INTEL_GPP_BASE(GPP_H0, GPP_D0, GPIO_RSVD_2, 128),       /* GPP_D */
        INTEL_GPP_BASE(GPP_H0, GPP_F0, GPP_F19, 160),           /* GPP_F */
};
 
/* This community is not visible to the OS */
static const struct pad_group icl_community2_groups[] = {
        INTEL_GPP(GPD0, GPD0, GPD11),                           /* GPD */
};
 
static const struct pad_group icl_community4_groups[] = {
        INTEL_GPP_BASE(GPP_C0, GPP_C0, GPP_C23, 224),           /* GPP_C */
        INTEL_GPP(GPP_C0, EDP_BKLTEN, MLK_RST_B),               /* HVCMOS */
        INTEL_GPP_BASE(GPP_C0, GPP_E0, GPP_E23, 256),           /* GPP_E */
        INTEL_GPP(GPP_C0, GPIO_RSVD_3, GPIO_RSVD_8),
};
 
static const struct pad_group icl_community5_groups[] = {
        INTEL_GPP_BASE(GPP_R0, GPP_R0, GPP_R7, 288),            /* GPP_R */
        INTEL_GPP_BASE(GPP_C0, GPP_S0, GPP_S7, 320),            /* GPP_S */
};
 
static const struct pad_community icl_communities[TOTAL_GPIO_COMM] = {
        /* GPP G, B, A */
        [COMM_0] = {
                .port = PID_GPIOCOM0,
                .first_pad = GPP_G0,
                .last_pad = GPP_A23,
                .num_gpi_regs = NUM_GPIO_COM0_GPI_REGS,
                .pad_cfg_base = PAD_CFG_BASE,
                .host_own_reg_0 = HOSTSW_OWN_REG_0,
                .gpi_int_sts_reg_0 = GPI_INT_STS_0,
                .gpi_int_en_reg_0 = GPI_INT_EN_0,
                .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
                .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
                .gpi_nmi_sts_reg_0 = GPI_NMI_STS_0,
                .gpi_nmi_en_reg_0 = GPI_NMI_EN_0,
                .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
                .name = "GPP_GBA",
                .acpi_path = "\\_SB.PCI0.GPIO",
                .reset_map = rst_map_com0,
                .num_reset_vals = ARRAY_SIZE(rst_map_com0),
                .groups = icl_community0_groups,
                .num_groups = ARRAY_SIZE(icl_community0_groups),
        },
        /* GPP H, D, F */
        [COMM_1] = {
                .port = PID_GPIOCOM1,
                .first_pad = GPP_H0,
                .last_pad = GPP_F19,
                .num_gpi_regs = NUM_GPIO_COM1_GPI_REGS,
                .pad_cfg_base = PAD_CFG_BASE,
                .host_own_reg_0 = HOSTSW_OWN_REG_0,
                .gpi_int_sts_reg_0 = GPI_INT_STS_0,
                .gpi_int_en_reg_0 = GPI_INT_EN_0,
                .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
                .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
                .gpi_nmi_sts_reg_0 = GPI_NMI_STS_0,
                .gpi_nmi_en_reg_0 = GPI_NMI_EN_0,
                .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
                .name = "GPP_HDF",
                .acpi_path = "\\_SB.PCI0.GPIO",
                .reset_map = rst_map,
                .num_reset_vals = ARRAY_SIZE(rst_map),
                .groups = icl_community1_groups,
                .num_groups = ARRAY_SIZE(icl_community1_groups),
        },
         /* GPD */
        [COMM_2] = {
                .port = PID_GPIOCOM2,
                .first_pad = GPD0,
                .last_pad = GPD11,
                .num_gpi_regs = NUM_GPIO_COM2_GPI_REGS,
                .pad_cfg_base = PAD_CFG_BASE,
                .host_own_reg_0 = HOSTSW_OWN_REG_0,
                .gpi_int_sts_reg_0 = GPI_INT_STS_0,
                .gpi_int_en_reg_0 = GPI_INT_EN_0,
                .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
                .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
                .gpi_nmi_sts_reg_0 = GPI_NMI_STS_0,
                .gpi_nmi_en_reg_0 = GPI_NMI_EN_0,
                .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
                .name = "GPD",
                .acpi_path = "\\_SB.PCI0.GPIO",
                .reset_map = rst_map,
                .num_reset_vals = ARRAY_SIZE(rst_map),
                .groups = icl_community2_groups,
                .num_groups = ARRAY_SIZE(icl_community2_groups),
        },
        /* GPP C, E */
        [COMM_3] = {
                .port = PID_GPIOCOM4,
                .first_pad = GPP_C0,
                .last_pad = GPP_E23,
                .num_gpi_regs = NUM_GPIO_COM4_GPI_REGS,
                .pad_cfg_base = PAD_CFG_BASE,
                .host_own_reg_0 = HOSTSW_OWN_REG_0,
                .gpi_int_sts_reg_0 = GPI_INT_STS_0,
                .gpi_int_en_reg_0 = GPI_INT_EN_0,
                .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
                .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
                .gpi_nmi_sts_reg_0 = GPI_NMI_STS_0,
                .gpi_nmi_en_reg_0 = GPI_NMI_EN_0,
                .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
                .name = "GPP_CE",
                .acpi_path = "\\_SB.PCI0.GPIO",
                .reset_map = rst_map,
                .num_reset_vals = ARRAY_SIZE(rst_map),
                .groups = icl_community4_groups,
                .num_groups = ARRAY_SIZE(icl_community4_groups),
        },
        /* GPP R, S */
        [COMM_4] = {
                .port = PID_GPIOCOM5,
                .first_pad = GPP_R0,
                .last_pad = GPP_S7,
                .num_gpi_regs = NUM_GPIO_COM5_GPI_REGS,
                .pad_cfg_base = PAD_CFG_BASE,
                .host_own_reg_0 = HOSTSW_OWN_REG_0,
                .gpi_int_sts_reg_0 = GPI_INT_STS_0,
                .gpi_int_en_reg_0 = GPI_INT_EN_0,
                .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
                .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
                .gpi_nmi_sts_reg_0 = GPI_NMI_STS_0,
                .gpi_nmi_en_reg_0 = GPI_NMI_EN_0,
                .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
                .name = "GPP_RS",
                .acpi_path = "\\_SB.PCI0.GPIO",
                .reset_map = rst_map,
                .num_reset_vals = ARRAY_SIZE(rst_map),
                .groups = icl_community5_groups,
                .num_groups = ARRAY_SIZE(icl_community5_groups),
        }
};
 
const struct pad_community *soc_gpio_get_community(size_t *num_communities)
{
        *num_communities = ARRAY_SIZE(icl_communities);
        return icl_communities;
}
 
const struct pmc_to_gpio_route *soc_pmc_gpio_routes(size_t *num)
{
        static const struct pmc_to_gpio_route routes[] = {
                { PMC_GPP_G, GPP_G },
                { PMC_GPP_B, GPP_B },
                { PMC_GPP_A, GPP_A },
                { PMC_GPP_H, GPP_H },
                { PMC_GPP_D, GPP_D },
                { PMC_GPP_F, GPP_F },
                { PMC_GPD, GPD },
                { PMC_GPP_C, GPP_C },
                { PMC_GPP_E, GPP_E },
                { PMC_GPP_R, GPP_R },
                { PMC_GPP_S, GPP_S }
 
        };
        *num = ARRAY_SIZE(routes);
        return routes;
}