drivers/mfd/intel-lpss-pci.c

   1 /*
   2  * Intel LPSS PCI support.
   3  *
   4  * Copyright (C) 2015, Intel Corporation
   5  *
   6  * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
   7  *          Mika Westerberg <mika.westerberg@linux.intel.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/ioport.h>
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/pci.h>
  18 #include <linux/pm.h>
  19 #include <linux/pm_runtime.h>
  20 #include <linux/property.h>
  21
  22 #include "intel-lpss.h"
  23
  24 static int intel_lpss_pci_probe(struct pci_dev *pdev,
  25                                 const struct pci_device_id *id)
  26 {
  27         struct intel_lpss_platform_info *info;
  28         int ret;
  29
  30         ret = pcim_enable_device(pdev);
  31         if (ret)
  32                 return ret;
  33
  34         info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
  35                             GFP_KERNEL);
  36         if (!info)
  37                 return -ENOMEM;
  38
  39         info->mem = &pdev->resource[0];
  40         info->irq = pdev->irq;
  41
  42         /* Probably it is enough to set this for iDMA capable devices only */
  43         pci_set_master(pdev);
  44
  45         ret = intel_lpss_probe(&pdev->dev, info);
  46         if (ret)
  47                 return ret;
  48
  49         pm_runtime_put(&pdev->dev);
  50         pm_runtime_allow(&pdev->dev);
  51
  52         return 0;
  53 }
  54
  55 static void intel_lpss_pci_remove(struct pci_dev *pdev)
  56 {
  57         pm_runtime_forbid(&pdev->dev);
  58         pm_runtime_get_sync(&pdev->dev);
  59
  60         intel_lpss_remove(&pdev->dev);
  61 }
  62
  63 static INTEL_LPSS_PM_OPS(intel_lpss_pci_pm_ops);
  64
  65 static const struct intel_lpss_platform_info spt_info = {
  66         .clk_rate = 120000000,
  67 };
  68
  69 static struct property_entry spt_i2c_properties[] = {
  70         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
  71         { },
  72 };
  73
  74 static const struct intel_lpss_platform_info spt_i2c_info = {
  75         .clk_rate = 120000000,
  76         .properties = spt_i2c_properties,
  77 };
  78
  79 static struct property_entry uart_properties[] = {
  80         PROPERTY_ENTRY_U32("reg-io-width", 4),
  81         PROPERTY_ENTRY_U32("reg-shift", 2),
  82         PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
  83         { },
  84 };
  85
  86 static const struct intel_lpss_platform_info spt_uart_info = {
  87         .clk_rate = 120000000,
  88         .clk_con_id = "baudclk",
  89         .properties = uart_properties,
  90 };
  91
  92 static const struct intel_lpss_platform_info bxt_info = {
  93         .clk_rate = 100000000,
  94 };
  95
  96 static const struct intel_lpss_platform_info bxt_uart_info = {
  97         .clk_rate = 100000000,
  98         .clk_con_id = "baudclk",
  99         .properties = uart_properties,
 100 };
 101
 102 static struct property_entry bxt_i2c_properties[] = {
 103         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
 104         PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
 105         PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
 106         { },
 107 };
 108
 109 static const struct intel_lpss_platform_info bxt_i2c_info = {
 110         .clk_rate = 133000000,
 111         .properties = bxt_i2c_properties,
 112 };
 113
 114 static const struct pci_device_id intel_lpss_pci_ids[] = {
 115         /* BXT A-Step */
 116         { PCI_VDEVICE(INTEL, 0x0aac), (kernel_ulong_t)&bxt_i2c_info },
 117         { PCI_VDEVICE(INTEL, 0x0aae), (kernel_ulong_t)&bxt_i2c_info },
 118         { PCI_VDEVICE(INTEL, 0x0ab0), (kernel_ulong_t)&bxt_i2c_info },
 119         { PCI_VDEVICE(INTEL, 0x0ab2), (kernel_ulong_t)&bxt_i2c_info },
 120         { PCI_VDEVICE(INTEL, 0x0ab4), (kernel_ulong_t)&bxt_i2c_info },
 121         { PCI_VDEVICE(INTEL, 0x0ab6), (kernel_ulong_t)&bxt_i2c_info },
 122         { PCI_VDEVICE(INTEL, 0x0ab8), (kernel_ulong_t)&bxt_i2c_info },
 123         { PCI_VDEVICE(INTEL, 0x0aba), (kernel_ulong_t)&bxt_i2c_info },
 124         { PCI_VDEVICE(INTEL, 0x0abc), (kernel_ulong_t)&bxt_uart_info },
 125         { PCI_VDEVICE(INTEL, 0x0abe), (kernel_ulong_t)&bxt_uart_info },
 126         { PCI_VDEVICE(INTEL, 0x0ac0), (kernel_ulong_t)&bxt_uart_info },
 127         { PCI_VDEVICE(INTEL, 0x0ac2), (kernel_ulong_t)&bxt_info },
 128         { PCI_VDEVICE(INTEL, 0x0ac4), (kernel_ulong_t)&bxt_info },
 129         { PCI_VDEVICE(INTEL, 0x0ac6), (kernel_ulong_t)&bxt_info },
 130         { PCI_VDEVICE(INTEL, 0x0aee), (kernel_ulong_t)&bxt_uart_info },
 131         /* BXT B-Step */
 132         { PCI_VDEVICE(INTEL, 0x1aac), (kernel_ulong_t)&bxt_i2c_info },
 133         { PCI_VDEVICE(INTEL, 0x1aae), (kernel_ulong_t)&bxt_i2c_info },
 134         { PCI_VDEVICE(INTEL, 0x1ab0), (kernel_ulong_t)&bxt_i2c_info },
 135         { PCI_VDEVICE(INTEL, 0x1ab2), (kernel_ulong_t)&bxt_i2c_info },
 136         { PCI_VDEVICE(INTEL, 0x1ab4), (kernel_ulong_t)&bxt_i2c_info },
 137         { PCI_VDEVICE(INTEL, 0x1ab6), (kernel_ulong_t)&bxt_i2c_info },
 138         { PCI_VDEVICE(INTEL, 0x1ab8), (kernel_ulong_t)&bxt_i2c_info },
 139         { PCI_VDEVICE(INTEL, 0x1aba), (kernel_ulong_t)&bxt_i2c_info },
 140         { PCI_VDEVICE(INTEL, 0x1abc), (kernel_ulong_t)&bxt_uart_info },
 141         { PCI_VDEVICE(INTEL, 0x1abe), (kernel_ulong_t)&bxt_uart_info },
 142         { PCI_VDEVICE(INTEL, 0x1ac0), (kernel_ulong_t)&bxt_uart_info },
 143         { PCI_VDEVICE(INTEL, 0x1ac2), (kernel_ulong_t)&bxt_info },
 144         { PCI_VDEVICE(INTEL, 0x1ac4), (kernel_ulong_t)&bxt_info },
 145         { PCI_VDEVICE(INTEL, 0x1ac6), (kernel_ulong_t)&bxt_info },
 146         { PCI_VDEVICE(INTEL, 0x1aee), (kernel_ulong_t)&bxt_uart_info },
 147
 148         /* APL */
 149         { PCI_VDEVICE(INTEL, 0x5aac), (kernel_ulong_t)&bxt_i2c_info },
 150         { PCI_VDEVICE(INTEL, 0x5aae), (kernel_ulong_t)&bxt_i2c_info },
 151         { PCI_VDEVICE(INTEL, 0x5ab0), (kernel_ulong_t)&bxt_i2c_info },
 152         { PCI_VDEVICE(INTEL, 0x5ab2), (kernel_ulong_t)&bxt_i2c_info },
 153         { PCI_VDEVICE(INTEL, 0x5ab4), (kernel_ulong_t)&bxt_i2c_info },
 154         { PCI_VDEVICE(INTEL, 0x5ab6), (kernel_ulong_t)&bxt_i2c_info },
 155         { PCI_VDEVICE(INTEL, 0x5ab8), (kernel_ulong_t)&bxt_i2c_info },
 156         { PCI_VDEVICE(INTEL, 0x5aba), (kernel_ulong_t)&bxt_i2c_info },
 157         { PCI_VDEVICE(INTEL, 0x5abc), (kernel_ulong_t)&bxt_uart_info },
 158         { PCI_VDEVICE(INTEL, 0x5abe), (kernel_ulong_t)&bxt_uart_info },
 159         { PCI_VDEVICE(INTEL, 0x5ac0), (kernel_ulong_t)&bxt_uart_info },
 160         { PCI_VDEVICE(INTEL, 0x5ac2), (kernel_ulong_t)&bxt_info },
 161         { PCI_VDEVICE(INTEL, 0x5ac4), (kernel_ulong_t)&bxt_info },
 162         { PCI_VDEVICE(INTEL, 0x5ac6), (kernel_ulong_t)&bxt_info },
 163         { PCI_VDEVICE(INTEL, 0x5aee), (kernel_ulong_t)&bxt_uart_info },
 164         /* SPT-LP */
 165         { PCI_VDEVICE(INTEL, 0x9d27), (kernel_ulong_t)&spt_uart_info },
 166         { PCI_VDEVICE(INTEL, 0x9d28), (kernel_ulong_t)&spt_uart_info },
 167         { PCI_VDEVICE(INTEL, 0x9d29), (kernel_ulong_t)&spt_info },
 168         { PCI_VDEVICE(INTEL, 0x9d2a), (kernel_ulong_t)&spt_info },
 169         { PCI_VDEVICE(INTEL, 0x9d60), (kernel_ulong_t)&spt_i2c_info },
 170         { PCI_VDEVICE(INTEL, 0x9d61), (kernel_ulong_t)&spt_i2c_info },
 171         { PCI_VDEVICE(INTEL, 0x9d62), (kernel_ulong_t)&spt_i2c_info },
 172         { PCI_VDEVICE(INTEL, 0x9d63), (kernel_ulong_t)&spt_i2c_info },
 173         { PCI_VDEVICE(INTEL, 0x9d64), (kernel_ulong_t)&spt_i2c_info },
 174         { PCI_VDEVICE(INTEL, 0x9d65), (kernel_ulong_t)&spt_i2c_info },
 175         { PCI_VDEVICE(INTEL, 0x9d66), (kernel_ulong_t)&spt_uart_info },
 176         /* SPT-H */
 177         { PCI_VDEVICE(INTEL, 0xa127), (kernel_ulong_t)&spt_uart_info },
 178         { PCI_VDEVICE(INTEL, 0xa128), (kernel_ulong_t)&spt_uart_info },
 179         { PCI_VDEVICE(INTEL, 0xa129), (kernel_ulong_t)&spt_info },
 180         { PCI_VDEVICE(INTEL, 0xa12a), (kernel_ulong_t)&spt_info },
 181         { PCI_VDEVICE(INTEL, 0xa160), (kernel_ulong_t)&spt_i2c_info },
 182         { PCI_VDEVICE(INTEL, 0xa161), (kernel_ulong_t)&spt_i2c_info },
 183         { PCI_VDEVICE(INTEL, 0xa166), (kernel_ulong_t)&spt_uart_info },
 184         { }
 185 };
 186 MODULE_DEVICE_TABLE(pci, intel_lpss_pci_ids);
 187
 188 static struct pci_driver intel_lpss_pci_driver = {
 189         .name = "intel-lpss",
 190         .id_table = intel_lpss_pci_ids,
 191         .probe = intel_lpss_pci_probe,
 192         .remove = intel_lpss_pci_remove,
 193         .driver = {
 194                 .pm = &intel_lpss_pci_pm_ops,
 195         },
 196 };
 197
 198 module_pci_driver(intel_lpss_pci_driver);
 199
 200 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
 201 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
 202 MODULE_DESCRIPTION("Intel LPSS PCI driver");
 203 MODULE_LICENSE("GPL v2");