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         pci_try_set_mwi(pdev);
  45
  46         ret = intel_lpss_probe(&pdev->dev, info);
  47         if (ret)
  48                 return ret;
  49
  50         pm_runtime_put(&pdev->dev);
  51         pm_runtime_allow(&pdev->dev);
  52
  53         return 0;
  54 }
  55
  56 static void intel_lpss_pci_remove(struct pci_dev *pdev)
  57 {
  58         pm_runtime_forbid(&pdev->dev);
  59         pm_runtime_get_sync(&pdev->dev);
  60
  61         intel_lpss_remove(&pdev->dev);
  62 }
  63
  64 static INTEL_LPSS_PM_OPS(intel_lpss_pci_pm_ops);
  65
  66 static const struct intel_lpss_platform_info spt_info = {
  67         .clk_rate = 120000000,
  68 };
  69
  70 static struct property_entry spt_i2c_properties[] = {
  71         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
  72         { },
  73 };
  74
  75 static const struct intel_lpss_platform_info spt_i2c_info = {
  76         .clk_rate = 120000000,
  77         .properties = spt_i2c_properties,
  78 };
  79
  80 static struct property_entry uart_properties[] = {
  81         PROPERTY_ENTRY_U32("reg-io-width", 4),
  82         PROPERTY_ENTRY_U32("reg-shift", 2),
  83         PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
  84         { },
  85 };
  86
  87 static const struct intel_lpss_platform_info spt_uart_info = {
  88         .clk_rate = 120000000,
  89         .clk_con_id = "baudclk",
  90         .properties = uart_properties,
  91 };
  92
  93 static const struct intel_lpss_platform_info bxt_info = {
  94         .clk_rate = 100000000,
  95 };
  96
  97 static const struct intel_lpss_platform_info bxt_uart_info = {
  98         .clk_rate = 100000000,
  99         .clk_con_id = "baudclk",
 100         .properties = uart_properties,
 101 };
 102
 103 static struct property_entry bxt_i2c_properties[] = {
 104         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
 105         PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
 106         PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
 107         { },
 108 };
 109
 110 static const struct intel_lpss_platform_info bxt_i2c_info = {
 111         .clk_rate = 133000000,
 112         .properties = bxt_i2c_properties,
 113 };
 114
 115 static struct property_entry apl_i2c_properties[] = {
 116         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207),
 117         PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
 118         PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
 119         { },
 120 };
 121
 122 static const struct intel_lpss_platform_info apl_i2c_info = {
 123         .clk_rate = 133000000,
 124         .properties = apl_i2c_properties,
 125 };
 126
 127 static const struct pci_device_id intel_lpss_pci_ids[] = {
 128         /* BXT A-Step */
 129         { PCI_VDEVICE(INTEL, 0x0aac), (kernel_ulong_t)&bxt_i2c_info },
 130         { PCI_VDEVICE(INTEL, 0x0aae), (kernel_ulong_t)&bxt_i2c_info },
 131         { PCI_VDEVICE(INTEL, 0x0ab0), (kernel_ulong_t)&bxt_i2c_info },
 132         { PCI_VDEVICE(INTEL, 0x0ab2), (kernel_ulong_t)&bxt_i2c_info },
 133         { PCI_VDEVICE(INTEL, 0x0ab4), (kernel_ulong_t)&bxt_i2c_info },
 134         { PCI_VDEVICE(INTEL, 0x0ab6), (kernel_ulong_t)&bxt_i2c_info },
 135         { PCI_VDEVICE(INTEL, 0x0ab8), (kernel_ulong_t)&bxt_i2c_info },
 136         { PCI_VDEVICE(INTEL, 0x0aba), (kernel_ulong_t)&bxt_i2c_info },
 137         { PCI_VDEVICE(INTEL, 0x0abc), (kernel_ulong_t)&bxt_uart_info },
 138         { PCI_VDEVICE(INTEL, 0x0abe), (kernel_ulong_t)&bxt_uart_info },
 139         { PCI_VDEVICE(INTEL, 0x0ac0), (kernel_ulong_t)&bxt_uart_info },
 140         { PCI_VDEVICE(INTEL, 0x0ac2), (kernel_ulong_t)&bxt_info },
 141         { PCI_VDEVICE(INTEL, 0x0ac4), (kernel_ulong_t)&bxt_info },
 142         { PCI_VDEVICE(INTEL, 0x0ac6), (kernel_ulong_t)&bxt_info },
 143         { PCI_VDEVICE(INTEL, 0x0aee), (kernel_ulong_t)&bxt_uart_info },
 144         /* BXT B-Step */
 145         { PCI_VDEVICE(INTEL, 0x1aac), (kernel_ulong_t)&bxt_i2c_info },
 146         { PCI_VDEVICE(INTEL, 0x1aae), (kernel_ulong_t)&bxt_i2c_info },
 147         { PCI_VDEVICE(INTEL, 0x1ab0), (kernel_ulong_t)&bxt_i2c_info },
 148         { PCI_VDEVICE(INTEL, 0x1ab2), (kernel_ulong_t)&bxt_i2c_info },
 149         { PCI_VDEVICE(INTEL, 0x1ab4), (kernel_ulong_t)&bxt_i2c_info },
 150         { PCI_VDEVICE(INTEL, 0x1ab6), (kernel_ulong_t)&bxt_i2c_info },
 151         { PCI_VDEVICE(INTEL, 0x1ab8), (kernel_ulong_t)&bxt_i2c_info },
 152         { PCI_VDEVICE(INTEL, 0x1aba), (kernel_ulong_t)&bxt_i2c_info },
 153         { PCI_VDEVICE(INTEL, 0x1abc), (kernel_ulong_t)&bxt_uart_info },
 154         { PCI_VDEVICE(INTEL, 0x1abe), (kernel_ulong_t)&bxt_uart_info },
 155         { PCI_VDEVICE(INTEL, 0x1ac0), (kernel_ulong_t)&bxt_uart_info },
 156         { PCI_VDEVICE(INTEL, 0x1ac2), (kernel_ulong_t)&bxt_info },
 157         { PCI_VDEVICE(INTEL, 0x1ac4), (kernel_ulong_t)&bxt_info },
 158         { PCI_VDEVICE(INTEL, 0x1ac6), (kernel_ulong_t)&bxt_info },
 159         { PCI_VDEVICE(INTEL, 0x1aee), (kernel_ulong_t)&bxt_uart_info },
 160
 161         /* APL */
 162         { PCI_VDEVICE(INTEL, 0x5aac), (kernel_ulong_t)&apl_i2c_info },
 163         { PCI_VDEVICE(INTEL, 0x5aae), (kernel_ulong_t)&apl_i2c_info },
 164         { PCI_VDEVICE(INTEL, 0x5ab0), (kernel_ulong_t)&apl_i2c_info },
 165         { PCI_VDEVICE(INTEL, 0x5ab2), (kernel_ulong_t)&apl_i2c_info },
 166         { PCI_VDEVICE(INTEL, 0x5ab4), (kernel_ulong_t)&apl_i2c_info },
 167         { PCI_VDEVICE(INTEL, 0x5ab6), (kernel_ulong_t)&apl_i2c_info },
 168         { PCI_VDEVICE(INTEL, 0x5ab8), (kernel_ulong_t)&apl_i2c_info },
 169         { PCI_VDEVICE(INTEL, 0x5aba), (kernel_ulong_t)&apl_i2c_info },
 170         { PCI_VDEVICE(INTEL, 0x5abc), (kernel_ulong_t)&bxt_uart_info },
 171         { PCI_VDEVICE(INTEL, 0x5abe), (kernel_ulong_t)&bxt_uart_info },
 172         { PCI_VDEVICE(INTEL, 0x5ac0), (kernel_ulong_t)&bxt_uart_info },
 173         { PCI_VDEVICE(INTEL, 0x5ac2), (kernel_ulong_t)&bxt_info },
 174         { PCI_VDEVICE(INTEL, 0x5ac4), (kernel_ulong_t)&bxt_info },
 175         { PCI_VDEVICE(INTEL, 0x5ac6), (kernel_ulong_t)&bxt_info },
 176         { PCI_VDEVICE(INTEL, 0x5aee), (kernel_ulong_t)&bxt_uart_info },
 177         /* SPT-LP */
 178         { PCI_VDEVICE(INTEL, 0x9d27), (kernel_ulong_t)&spt_uart_info },
 179         { PCI_VDEVICE(INTEL, 0x9d28), (kernel_ulong_t)&spt_uart_info },
 180         { PCI_VDEVICE(INTEL, 0x9d29), (kernel_ulong_t)&spt_info },
 181         { PCI_VDEVICE(INTEL, 0x9d2a), (kernel_ulong_t)&spt_info },
 182         { PCI_VDEVICE(INTEL, 0x9d60), (kernel_ulong_t)&spt_i2c_info },
 183         { PCI_VDEVICE(INTEL, 0x9d61), (kernel_ulong_t)&spt_i2c_info },
 184         { PCI_VDEVICE(INTEL, 0x9d62), (kernel_ulong_t)&spt_i2c_info },
 185         { PCI_VDEVICE(INTEL, 0x9d63), (kernel_ulong_t)&spt_i2c_info },
 186         { PCI_VDEVICE(INTEL, 0x9d64), (kernel_ulong_t)&spt_i2c_info },
 187         { PCI_VDEVICE(INTEL, 0x9d65), (kernel_ulong_t)&spt_i2c_info },
 188         { PCI_VDEVICE(INTEL, 0x9d66), (kernel_ulong_t)&spt_uart_info },
 189         /* SPT-H */
 190         { PCI_VDEVICE(INTEL, 0xa127), (kernel_ulong_t)&spt_uart_info },
 191         { PCI_VDEVICE(INTEL, 0xa128), (kernel_ulong_t)&spt_uart_info },
 192         { PCI_VDEVICE(INTEL, 0xa129), (kernel_ulong_t)&spt_info },
 193         { PCI_VDEVICE(INTEL, 0xa12a), (kernel_ulong_t)&spt_info },
 194         { PCI_VDEVICE(INTEL, 0xa160), (kernel_ulong_t)&spt_i2c_info },
 195         { PCI_VDEVICE(INTEL, 0xa161), (kernel_ulong_t)&spt_i2c_info },
 196         { PCI_VDEVICE(INTEL, 0xa166), (kernel_ulong_t)&spt_uart_info },
 197         /* KBL-H */
 198         { PCI_VDEVICE(INTEL, 0xa2a7), (kernel_ulong_t)&spt_uart_info },
 199         { PCI_VDEVICE(INTEL, 0xa2a8), (kernel_ulong_t)&spt_uart_info },
 200         { PCI_VDEVICE(INTEL, 0xa2a9), (kernel_ulong_t)&spt_info },
 201         { PCI_VDEVICE(INTEL, 0xa2aa), (kernel_ulong_t)&spt_info },
 202         { PCI_VDEVICE(INTEL, 0xa2e0), (kernel_ulong_t)&spt_i2c_info },
 203         { PCI_VDEVICE(INTEL, 0xa2e1), (kernel_ulong_t)&spt_i2c_info },
 204         { PCI_VDEVICE(INTEL, 0xa2e2), (kernel_ulong_t)&spt_i2c_info },
 205         { PCI_VDEVICE(INTEL, 0xa2e3), (kernel_ulong_t)&spt_i2c_info },
 206         { PCI_VDEVICE(INTEL, 0xa2e6), (kernel_ulong_t)&spt_uart_info },
 207         { }
 208 };
 209 MODULE_DEVICE_TABLE(pci, intel_lpss_pci_ids);
 210
 211 static struct pci_driver intel_lpss_pci_driver = {
 212         .name = "intel-lpss",
 213         .id_table = intel_lpss_pci_ids,
 214         .probe = intel_lpss_pci_probe,
 215         .remove = intel_lpss_pci_remove,
 216         .driver = {
 217                 .pm = &intel_lpss_pci_pm_ops,
 218         },
 219 };
 220
 221 module_pci_driver(intel_lpss_pci_driver);
 222
 223 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
 224 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
 225 MODULE_DESCRIPTION("Intel LPSS PCI driver");
 226 MODULE_LICENSE("GPL v2");