arch/x86/platform/intel-mid/device_libs/platform_bt.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Bluetooth platform data initialization file
   4  *
   5  * (C) Copyright 2017 Intel Corporation
   6  * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
   7  */
   8
   9 #include <linux/gpio/machine.h>
  10 #include <linux/pci.h>
  11 #include <linux/platform_device.h>
  12
  13 #include <asm/cpu_device_id.h>
  14 #include <asm/intel-family.h>
  15 #include <asm/intel-mid.h>
  16
  17 struct bt_sfi_data {
  18         struct device *dev;
  19         const char *name;
  20         int (*setup)(struct bt_sfi_data *ddata);
  21 };
  22
  23 static struct gpiod_lookup_table tng_bt_sfi_gpio_table = {
  24         .dev_id = "hci_bcm",
  25         .table  = {
  26                 GPIO_LOOKUP("0000:00:0c.0", -1, "device-wakeup", GPIO_ACTIVE_HIGH),
  27                 GPIO_LOOKUP("0000:00:0c.0", -1, "shutdown",      GPIO_ACTIVE_HIGH),
  28                 GPIO_LOOKUP("0000:00:0c.0", -1, "host-wakeup",   GPIO_ACTIVE_HIGH),
  29                 { },
  30         },
  31 };
  32
  33 #define TNG_BT_SFI_GPIO_DEVICE_WAKEUP   "bt_wakeup"
  34 #define TNG_BT_SFI_GPIO_SHUTDOWN        "BT-reset"
  35 #define TNG_BT_SFI_GPIO_HOST_WAKEUP     "bt_uart_enable"
  36
  37 static int __init tng_bt_sfi_setup(struct bt_sfi_data *ddata)
  38 {
  39         struct gpiod_lookup_table *table = &tng_bt_sfi_gpio_table;
  40         struct gpiod_lookup *lookup = table->table;
  41         struct pci_dev *pdev;
  42
  43         /* Connected to /dev/ttyS0 */
  44         pdev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(4, 1));
  45         if (!pdev)
  46                 return -ENODEV;
  47
  48         ddata->dev = &pdev->dev;
  49         ddata->name = table->dev_id;
  50
  51         lookup[0].chip_hwnum = get_gpio_by_name(TNG_BT_SFI_GPIO_DEVICE_WAKEUP);
  52         lookup[1].chip_hwnum = get_gpio_by_name(TNG_BT_SFI_GPIO_SHUTDOWN);
  53         lookup[2].chip_hwnum = get_gpio_by_name(TNG_BT_SFI_GPIO_HOST_WAKEUP);
  54
  55         gpiod_add_lookup_table(table);
  56         return 0;
  57 }
  58
  59 static struct bt_sfi_data tng_bt_sfi_data __initdata = {
  60         .setup  = tng_bt_sfi_setup,
  61 };
  62
  63 static const struct x86_cpu_id bt_sfi_cpu_ids[] = {
  64         X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT_MID, &tng_bt_sfi_data),
  65         {}
  66 };
  67
  68 static int __init bt_sfi_init(void)
  69 {
  70         struct platform_device_info info;
  71         struct platform_device *pdev;
  72         const struct x86_cpu_id *id;
  73         struct bt_sfi_data *ddata;
  74         int ret;
  75
  76         id = x86_match_cpu(bt_sfi_cpu_ids);
  77         if (!id)
  78                 return -ENODEV;
  79
  80         ddata = (struct bt_sfi_data *)id->driver_data;
  81         if (!ddata)
  82                 return -ENODEV;
  83
  84         ret = ddata->setup(ddata);
  85         if (ret)
  86                 return ret;
  87
  88         memset(&info, 0, sizeof(info));
  89         info.fwnode     = ddata->dev->fwnode;
  90         info.parent     = ddata->dev;
  91         info.name       = ddata->name,
  92         info.id         = PLATFORM_DEVID_NONE,
  93
  94         pdev = platform_device_register_full(&info);
  95         if (IS_ERR(pdev))
  96                 return PTR_ERR(pdev);
  97
  98         dev_info(ddata->dev, "Registered Bluetooth device: %s\n", ddata->name);
  99         return 0;
 100 }
 101 device_initcall(bt_sfi_init);