drivers/mfd/rdc321x-southbridge.c

   1 /*
   2  * RDC321x MFD southbrige driver
   3  *
   4  * Copyright (C) 2007-2010 Florian Fainelli <florian@openwrt.org>
   5  * Copyright (C) 2010 Bernhard Loos <bernhardloos@googlemail.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22 #include <linux/init.h>
  23 #include <linux/module.h>
  24 #include <linux/kernel.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/pci.h>
  27 #include <linux/mfd/core.h>
  28 #include <linux/mfd/rdc321x.h>
  29
  30 static struct rdc321x_wdt_pdata rdc321x_wdt_pdata;
  31
  32 static struct resource rdc321x_wdt_resource[] = {
  33         {
  34                 .name   = "wdt-reg",
  35                 .start  = RDC321X_WDT_CTRL,
  36                 .end    = RDC321X_WDT_CTRL + 0x3,
  37                 .flags  = IORESOURCE_IO,
  38         }
  39 };
  40
  41 static struct rdc321x_gpio_pdata rdc321x_gpio_pdata = {
  42         .max_gpios      = RDC321X_MAX_GPIO,
  43 };
  44
  45 static struct resource rdc321x_gpio_resources[] = {
  46         {
  47                 .name   = "gpio-reg1",
  48                 .start  = RDC321X_GPIO_CTRL_REG1,
  49                 .end    = RDC321X_GPIO_CTRL_REG1 + 0x7,
  50                 .flags  = IORESOURCE_IO,
  51         }, {
  52                 .name   = "gpio-reg2",
  53                 .start  = RDC321X_GPIO_CTRL_REG2,
  54                 .end    = RDC321X_GPIO_CTRL_REG2 + 0x7,
  55                 .flags  = IORESOURCE_IO,
  56         }
  57 };
  58
  59 static struct mfd_cell rdc321x_sb_cells[] = {
  60         {
  61                 .name           = "rdc321x-wdt",
  62                 .resources      = rdc321x_wdt_resource,
  63                 .num_resources  = ARRAY_SIZE(rdc321x_wdt_resource),
  64                 .platform_data  = &rdc321x_wdt_pdata,
  65                 .pdata_size     = sizeof(rdc321x_wdt_pdata),
  66         }, {
  67                 .name           = "rdc321x-gpio",
  68                 .resources      = rdc321x_gpio_resources,
  69                 .num_resources  = ARRAY_SIZE(rdc321x_gpio_resources),
  70                 .platform_data  = &rdc321x_gpio_pdata,
  71                 .pdata_size     = sizeof(rdc321x_gpio_pdata),
  72         },
  73 };
  74
  75 static int __devinit rdc321x_sb_probe(struct pci_dev *pdev,
  76                                         const struct pci_device_id *ent)
  77 {
  78         int err;
  79
  80         err = pci_enable_device(pdev);
  81         if (err) {
  82                 dev_err(&pdev->dev, "failed to enable device\n");
  83                 return err;
  84         }
  85
  86         rdc321x_gpio_pdata.sb_pdev = pdev;
  87         rdc321x_wdt_pdata.sb_pdev = pdev;
  88
  89         return mfd_add_devices(&pdev->dev, -1,
  90                 rdc321x_sb_cells, ARRAY_SIZE(rdc321x_sb_cells), NULL, 0);
  91 }
  92
  93 static void __devexit rdc321x_sb_remove(struct pci_dev *pdev)
  94 {
  95         mfd_remove_devices(&pdev->dev);
  96 }
  97
  98 static DEFINE_PCI_DEVICE_TABLE(rdc321x_sb_table) = {
  99         { PCI_DEVICE(PCI_VENDOR_ID_RDC, PCI_DEVICE_ID_RDC_R6030) },
 100         {}
 101 };
 102 MODULE_DEVICE_TABLE(pci, rdc321x_sb_table);
 103
 104 static struct pci_driver rdc321x_sb_driver = {
 105         .name           = "RDC321x Southbridge",
 106         .id_table       = rdc321x_sb_table,
 107         .probe          = rdc321x_sb_probe,
 108         .remove         = __devexit_p(rdc321x_sb_remove),
 109 };
 110
 111 static int __init rdc321x_sb_init(void)
 112 {
 113         return pci_register_driver(&rdc321x_sb_driver);
 114 }
 115
 116 static void __exit rdc321x_sb_exit(void)
 117 {
 118         pci_unregister_driver(&rdc321x_sb_driver);
 119 }
 120
 121 module_init(rdc321x_sb_init);
 122 module_exit(rdc321x_sb_exit);
 123
 124 MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
 125 MODULE_LICENSE("GPL");
 126 MODULE_DESCRIPTION("RDC R-321x MFD southbridge driver");