src/superio/aspeed/ast2400/superio.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include <device/device.h>
   4 #include <device/pnp.h>
   5 #include <superio/conf_mode.h>
   6 #include <pc80/keyboard.h>
   7 #include <superio/common/ssdt.h>
   8 #include <acpi/acpi.h>
   9 #include "ast2400.h"
  10 #include "chip.h"
  11
  12 static void ast2400_init(struct device *dev)
  13 {
  14         struct superio_aspeed_ast2400_config *conf = dev->chip_info;
  15
  16         if (!dev->enabled)
  17                 return;
  18
  19         if (conf && conf->use_espi) {
  20                 pnp_enter_conf_mode(dev);
  21                 pnp_set_logical_device(dev);
  22                 /* In ESPI mode must write 0 to IRQ level on every LDN */
  23                 pnp_write_config(dev, 0x71, 0);
  24                 pnp_exit_conf_mode(dev);
  25         }
  26
  27         switch (dev->path.pnp.device) {
  28         case AST2400_KBC:
  29                 pc_keyboard_init(NO_AUX_DEVICE);
  30                 break;
  31         }
  32 }
  33
  34 #if CONFIG(HAVE_ACPI_TABLES)
  35 /* Provide ACPI HIDs for generic Super I/O SSDT */
  36 static const char *ast2400_acpi_hid(const struct device *dev)
  37 {
  38         /* Sanity checks */
  39         if (dev->path.type != DEVICE_PATH_PNP)
  40                 return NULL;
  41         if (dev->path.pnp.port == 0)
  42                 return NULL;
  43         if ((dev->path.pnp.device & 0xff) > AST2400_MAILBOX)
  44                 return NULL;
  45
  46         switch (dev->path.pnp.device & 0xff) {
  47         case AST2400_SUART1: /* fallthrough */
  48         case AST2400_SUART2: /* fallthrough */
  49         case AST2400_SUART3: /* fallthrough */
  50         case AST2400_SUART4:
  51                 return ACPI_HID_COM;
  52         case AST2400_KBC:
  53                 return ACPI_HID_KEYBOARD;
  54         default:
  55                 return ACPI_HID_PNP;
  56         }
  57 }
  58 #endif
  59
  60 static struct device_operations ops = {
  61         .read_resources = pnp_read_resources,
  62         .set_resources = pnp_set_resources,
  63         .enable_resources = pnp_enable_resources,
  64         .enable = pnp_enable,
  65         .init = ast2400_init,
  66         .ops_pnp_mode = &pnp_conf_mode_a5a5_aa,
  67 #if CONFIG(HAVE_ACPI_TABLES)
  68         .acpi_fill_ssdt = superio_common_fill_ssdt_generator,
  69         .acpi_name = superio_common_ldn_acpi_name,
  70         .acpi_hid = ast2400_acpi_hid,
  71 #endif
  72 };
  73
  74 static struct pnp_info pnp_dev_info[] = {
  75         { NULL, AST2400_SUART1,   PNP_IO0 | PNP_IRQ0 | PNP_MSC0, 0xfff8, },
  76         { NULL, AST2400_SUART2,   PNP_IO0 | PNP_IRQ0 | PNP_MSC0, 0xfff8, },
  77         { NULL, AST2400_SWC,      PNP_IO0 | PNP_IO1 | PNP_IO2 | PNP_IO3
  78                 | PNP_IRQ0, 0xfff8, 0xfff8, 0xfff8, 0xfff8, },
  79         { NULL, AST2400_KBC,      PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_IRQ1
  80                 | PNP_MSC0, 0xffff, 0xffff, },
  81         { NULL, AST2400_GPIO,     PNP_IRQ0, }, // GPIO LDN has no IO Region
  82         { NULL, AST2400_SUART3,   PNP_IO0 | PNP_IRQ0 | PNP_MSC0, 0xfff8, },
  83         { NULL, AST2400_SUART4,   PNP_IO0 | PNP_IRQ0 | PNP_MSC0, 0xfff8, },
  84         { NULL, AST2400_ILPC2AHB, PNP_IRQ0 },
  85         { NULL, AST2400_MAILBOX,  PNP_IO0 | PNP_IRQ0, 0xfffe, },
  86 };
  87
  88 static void enable_dev(struct device *dev)
  89 {
  90         struct superio_aspeed_ast2400_config *conf = dev->chip_info;
  91
  92         if (conf && conf->use_espi) {
  93                 /* UART3 and UART4 are not usable in ESPI mode */
  94                 for (size_t i = 0; i < ARRAY_SIZE(pnp_dev_info); i++) {
  95                         if ((pnp_dev_info[i].function == AST2400_SUART3) ||
  96                             (pnp_dev_info[i].function == AST2400_SUART4))
  97                                 pnp_dev_info[i].function = PNP_SKIP_FUNCTION;
  98                 }
  99         }
 100
 101         pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info),
 102                 pnp_dev_info);
 103 }
 104
 105 struct chip_operations superio_aspeed_ast2400_ops = {
 106         .name = "ASpeed AST2400/AST2500 Super I/O",
 107         .enable_dev = enable_dev,
 108 };