src/soc/intel/elkhartlake/gpio.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include <intelblocks/gpio.h>
   4 #include <intelblocks/pcr.h>
   5 #include <soc/pcr_ids.h>
   6 #include <soc/pmc.h>
   7
   8 static const struct reset_mapping rst_map[] = {
   9         { .logical = PAD_CFG0_LOGICAL_RESET_RSMRST, .chipset = 0U << 30 },
  10         { .logical = PAD_CFG0_LOGICAL_RESET_DEEP, .chipset = 1U << 30 },
  11         { .logical = PAD_CFG0_LOGICAL_RESET_PLTRST, .chipset = 2U << 30 },
  12 };
  13
  14 static const struct reset_mapping rst_map_com0[] = {
  15         { .logical = PAD_CFG0_LOGICAL_RESET_PWROK, .chipset = 0U << 30 },
  16         { .logical = PAD_CFG0_LOGICAL_RESET_DEEP, .chipset = 1U << 30 },
  17         { .logical = PAD_CFG0_LOGICAL_RESET_PLTRST, .chipset = 2U << 30 },
  18         { .logical = PAD_CFG0_LOGICAL_RESET_RSMRST, .chipset = 3U << 30 },
  19 };
  20
  21 /*
  22  * The GPIO driver for Elkhartlake on Windows/Linux expects 32 GPIOs per pad
  23  * group, regardless of whether or not there is a physical pad for each
  24  * exposed GPIO number.
  25  *
  26  * This results in the OS having a sparse GPIO map, and devices that need
  27  * to export an ACPI GPIO must use the OS expected number.
  28  *
  29  * Not all pins are usable as GPIO and those groups do not have a pad base.
  30  *
  31  * This layout matches the Linux kernel pinctrl map for MCC at:
  32  * linux/drivers/pinctrl/intel/pinctrl-elkhartlake.c
  33  */
  34 static const struct pad_group ehl_community0_groups[] = {
  35         INTEL_GPP_BASE(GPP_B0, GPP_B0, GPP_B23, 0),             /* GPP_B */
  36         INTEL_GPP(GPP_B0, GPIO_RSVD_0, GPIO_RSVD_1),
  37         INTEL_GPP_BASE(GPP_B0, GPP_T0, GPP_T15, 32),            /* GPP_T */
  38         INTEL_GPP_BASE(GPP_B0, GPP_G0, GPIO_RSVD_2, 64),        /* GPP_G */
  39 };
  40
  41 static const struct pad_group ehl_community1_groups[] = {
  42         INTEL_GPP_BASE(GPP_V0, GPP_V0, GPP_V15, 96),            /* GPP_V */
  43         INTEL_GPP_BASE(GPP_V0, GPP_H0, GPP_H23, 128),           /* GPP_H */
  44         INTEL_GPP_BASE(GPP_V0, GPP_D0, GPIO_RSVD_3, 160),       /* GPP_D */
  45         INTEL_GPP_BASE(GPP_V0, GPP_U0, GPP_U19, 192),           /* GPP_U */
  46         INTEL_GPP(GPP_V0, GPIO_RSVD_4, GPIO_RSVD_7),
  47         INTEL_GPP_BASE(GPP_V0, VGPIO_0, VGPIO_39, 224),         /* VGPIO */
  48 };
  49
  50 /* This community is not visible to the OS */
  51 static const struct pad_group ehl_community2_groups[] = {
  52         INTEL_GPP(GPD0, GPD0, GPIO_RSVD_12),                    /* GPD */
  53 };
  54
  55 static const struct pad_group ehl_community3_groups[] = {
  56         INTEL_GPP(GPIO_RSVD_13, GPIO_RSVD_13, GPIO_RSVD_29),
  57         INTEL_GPP_BASE(GPIO_RSVD_13, GPP_S0, GPP_S1, 288),      /* GPP_S */
  58         INTEL_GPP_BASE(GPIO_RSVD_13, GPP_A0, GPP_A23, 320),     /* GPP_A */
  59         INTEL_GPP(GPIO_RSVD_13, VGPIO_USB_0, VGPIO_USB_3),
  60 };
  61
  62 static const struct pad_group ehl_community4_groups[] = {
  63         INTEL_GPP_BASE(GPP_C0, GPP_C0, GPP_C23, 352),           /* GPP_C */
  64         INTEL_GPP_BASE(GPP_C0, GPP_F0, GPP_F23, 384),           /* GPP_F */
  65         INTEL_GPP(GPP_C0, GPIO_RSVD_30, GPIO_RSVD_36),
  66         INTEL_GPP_BASE(GPP_C0, GPP_E0, GPP_E23, 416),           /* GPP_E */
  67 };
  68
  69 static const struct pad_group ehl_community5_groups[] = {
  70         INTEL_GPP_BASE(GPP_R0, GPP_R0, GPP_R7, 448),            /* GPP_R */
  71 };
  72
  73 static const struct pad_community ehl_communities[TOTAL_GPIO_COMM] = {
  74         /* GPP B, T, G */
  75         [COMM_0] = {
  76                 .port = PID_GPIOCOM0,
  77                 .first_pad = GPIO_COM0_START,
  78                 .last_pad = GPIO_COM0_END,
  79                 .num_gpi_regs = NUM_GPIO_COM0_GPI_REGS,
  80                 .pad_cfg_base = PAD_CFG_BASE,
  81                 .host_own_reg_0 = HOSTSW_OWN_REG_0,
  82                 .gpi_int_sts_reg_0 = GPI_INT_STS_0,
  83                 .gpi_int_en_reg_0 = GPI_INT_EN_0,
  84                 .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
  85                 .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
  86                 .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
  87                 .name = "GPP_BTG",
  88                 .acpi_path = "\\_SB.PCI0.GPIO",
  89                 .reset_map = rst_map_com0,
  90                 .num_reset_vals = ARRAY_SIZE(rst_map_com0),
  91                 .groups = ehl_community0_groups,
  92                 .num_groups = ARRAY_SIZE(ehl_community0_groups),
  93         },
  94         /* GPP V, H, D, U, VGPIO */
  95         [COMM_1] = {
  96                 .port = PID_GPIOCOM1,
  97                 .first_pad = GPIO_COM1_START,
  98                 .last_pad = GPIO_COM1_END,
  99                 .num_gpi_regs = NUM_GPIO_COM1_GPI_REGS,
 100                 .pad_cfg_base = PAD_CFG_BASE,
 101                 .host_own_reg_0 = HOSTSW_OWN_REG_0,
 102                 .gpi_int_sts_reg_0 = GPI_INT_STS_0,
 103                 .gpi_int_en_reg_0 = GPI_INT_EN_0,
 104                 .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
 105                 .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
 106                 .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
 107                 .name = "GPP_VHDU",
 108                 .acpi_path = "\\_SB.PCI0.GPIO",
 109                 .reset_map = rst_map,
 110                 .num_reset_vals = ARRAY_SIZE(rst_map),
 111                 .groups = ehl_community1_groups,
 112                 .num_groups = ARRAY_SIZE(ehl_community1_groups),
 113         },
 114         /* GPD */
 115         [COMM_2] = {
 116                 .port = PID_GPIOCOM2,
 117                 .first_pad = GPIO_COM2_START,
 118                 .last_pad = GPIO_COM2_END,
 119                 .num_gpi_regs = NUM_GPIO_COM2_GPI_REGS,
 120                 .pad_cfg_base = PAD_CFG_BASE,
 121                 .host_own_reg_0 = HOSTSW_OWN_REG_0,
 122                 .gpi_int_sts_reg_0 = GPI_INT_STS_0,
 123                 .gpi_int_en_reg_0 = GPI_INT_EN_0,
 124                 .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
 125                 .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
 126                 .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
 127                 .name = "GPD",
 128                 .acpi_path = "\\_SB.PCI0.GPIO",
 129                 .reset_map = rst_map,
 130                 .num_reset_vals = ARRAY_SIZE(rst_map),
 131                 .groups = ehl_community2_groups,
 132                 .num_groups = ARRAY_SIZE(ehl_community2_groups),
 133         },
 134         /* GPP S, A */
 135         [COMM_3] = {
 136                 .port = PID_GPIOCOM3,
 137                 .first_pad = GPIO_COM3_START,
 138                 .last_pad = GPIO_COM3_END,
 139                 .num_gpi_regs = NUM_GPIO_COM3_GPI_REGS,
 140                 .pad_cfg_base = PAD_CFG_BASE,
 141                 .host_own_reg_0 = HOSTSW_OWN_REG_0,
 142                 .gpi_int_sts_reg_0 = GPI_INT_STS_0,
 143                 .gpi_int_en_reg_0 = GPI_INT_EN_0,
 144                 .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
 145                 .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
 146                 .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
 147                 .name = "GPP_SA",
 148                 .acpi_path = "\\_SB.PCI0.GPIO",
 149                 .reset_map = rst_map,
 150                 .num_reset_vals = ARRAY_SIZE(rst_map),
 151                 .groups = ehl_community3_groups,
 152                 .num_groups = ARRAY_SIZE(ehl_community3_groups),
 153         },
 154         /* GPP C, F, E */
 155         [COMM_4] = {
 156                 .port = PID_GPIOCOM4,
 157                 .first_pad = GPIO_COM4_START,
 158                 .last_pad = GPIO_COM4_END,
 159                 .num_gpi_regs = NUM_GPIO_COM4_GPI_REGS,
 160                 .pad_cfg_base = PAD_CFG_BASE,
 161                 .host_own_reg_0 = HOSTSW_OWN_REG_0,
 162                 .gpi_int_sts_reg_0 = GPI_INT_STS_0,
 163                 .gpi_int_en_reg_0 = GPI_INT_EN_0,
 164                 .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
 165                 .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
 166                 .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
 167                 .name = "GPP_CFE",
 168                 .acpi_path = "\\_SB.PCI0.GPIO",
 169                 .reset_map = rst_map,
 170                 .num_reset_vals = ARRAY_SIZE(rst_map),
 171                 .groups = ehl_community4_groups,
 172                 .num_groups = ARRAY_SIZE(ehl_community4_groups),
 173         },
 174         /* GPP R*/
 175         [COMM_5] = {
 176                 .port = PID_GPIOCOM5,
 177                 .first_pad = GPIO_COM5_START,
 178                 .last_pad = GPIO_COM5_END,
 179                 .num_gpi_regs = NUM_GPIO_COM5_GPI_REGS,
 180                 .pad_cfg_base = PAD_CFG_BASE,
 181                 .host_own_reg_0 = HOSTSW_OWN_REG_0,
 182                 .gpi_int_sts_reg_0 = GPI_INT_STS_0,
 183                 .gpi_int_en_reg_0 = GPI_INT_EN_0,
 184                 .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
 185                 .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
 186                 .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
 187                 .name = "GPP_RR",
 188                 .acpi_path = "\\_SB.PCI0.GPIO",
 189                 .reset_map = rst_map,
 190                 .num_reset_vals = ARRAY_SIZE(rst_map),
 191                 .groups = ehl_community5_groups,
 192                 .num_groups = ARRAY_SIZE(ehl_community5_groups),
 193         }
 194 };
 195
 196 const struct pad_community *soc_gpio_get_community(size_t *num_communities)
 197 {
 198         *num_communities = ARRAY_SIZE(ehl_communities);
 199         return ehl_communities;
 200 }
 201
 202 const struct pmc_to_gpio_route *soc_pmc_gpio_routes(size_t *num)
 203 {
 204         static const struct pmc_to_gpio_route routes[] = {
 205                 { PMC_GPP_B, GPP_B },
 206                 { PMC_GPP_T, GPP_T },
 207                 { PMC_GPP_D, GPP_D },
 208                 { PMC_GPP_A, GPP_A },
 209                 { PMC_GPP_R, GPP_R },
 210                 { PMC_GPP_V, GPP_V },
 211                 { PMC_GPD, GPD },
 212                 { PMC_GPP_H, GPP_H },
 213                 { PMC_GPP_U, GPP_U },
 214                 { PMC_VGPIO, VGPIO },
 215                 { PMC_GPP_F, GPP_F },
 216                 { PMC_GPP_C, GPP_C },
 217                 { PMC_GPP_E, GPP_E },
 218                 { PMC_GPP_G, GPP_G },
 219                 { PMC_GPP_S, GPP_S }
 220         };
 221
 222         *num = ARRAY_SIZE(routes);
 223         return routes;
 224 }