drivers/net/wireless/ralink/rt2x00/rt2x00soc.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3         Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
   4         Copyright (C) 2004 - 2009 Felix Fietkau <nbd@openwrt.org>
   5         <http://rt2x00.serialmonkey.com>
   6
   7  */
   8
   9 /*
  10         Module: rt2x00soc
  11         Abstract: rt2x00 generic soc device routines.
  12  */
  13
  14 #include <linux/bug.h>
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/slab.h>
  19
  20 #include "rt2x00.h"
  21 #include "rt2x00soc.h"
  22
  23 static void rt2x00soc_free_reg(struct rt2x00_dev *rt2x00dev)
  24 {
  25         kfree(rt2x00dev->rf);
  26         rt2x00dev->rf = NULL;
  27
  28         kfree(rt2x00dev->eeprom);
  29         rt2x00dev->eeprom = NULL;
  30
  31         iounmap(rt2x00dev->csr.base);
  32 }
  33
  34 static int rt2x00soc_alloc_reg(struct rt2x00_dev *rt2x00dev)
  35 {
  36         struct platform_device *pdev = to_platform_device(rt2x00dev->dev);
  37         struct resource *res;
  38
  39         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  40         if (!res)
  41                 return -ENODEV;
  42
  43         rt2x00dev->csr.base = ioremap(res->start, resource_size(res));
  44         if (!rt2x00dev->csr.base)
  45                 return -ENOMEM;
  46
  47         rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
  48         if (!rt2x00dev->eeprom)
  49                 goto exit;
  50
  51         rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
  52         if (!rt2x00dev->rf)
  53                 goto exit;
  54
  55         return 0;
  56
  57 exit:
  58         rt2x00_probe_err("Failed to allocate registers\n");
  59         rt2x00soc_free_reg(rt2x00dev);
  60
  61         return -ENOMEM;
  62 }
  63
  64 int rt2x00soc_probe(struct platform_device *pdev, const struct rt2x00_ops *ops)
  65 {
  66         struct ieee80211_hw *hw;
  67         struct rt2x00_dev *rt2x00dev;
  68         int retval;
  69
  70         hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
  71         if (!hw) {
  72                 rt2x00_probe_err("Failed to allocate hardware\n");
  73                 return -ENOMEM;
  74         }
  75
  76         platform_set_drvdata(pdev, hw);
  77
  78         rt2x00dev = hw->priv;
  79         rt2x00dev->dev = &pdev->dev;
  80         rt2x00dev->ops = ops;
  81         rt2x00dev->hw = hw;
  82         rt2x00dev->irq = platform_get_irq(pdev, 0);
  83         rt2x00dev->name = pdev->dev.driver->name;
  84
  85         rt2x00dev->clk = clk_get(&pdev->dev, NULL);
  86         if (IS_ERR(rt2x00dev->clk))
  87                 rt2x00dev->clk = NULL;
  88
  89         rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
  90
  91         retval = rt2x00soc_alloc_reg(rt2x00dev);
  92         if (retval)
  93                 goto exit_free_device;
  94
  95         retval = rt2x00lib_probe_dev(rt2x00dev);
  96         if (retval)
  97                 goto exit_free_reg;
  98
  99         return 0;
 100
 101 exit_free_reg:
 102         rt2x00soc_free_reg(rt2x00dev);
 103
 104 exit_free_device:
 105         ieee80211_free_hw(hw);
 106
 107         return retval;
 108 }
 109 EXPORT_SYMBOL_GPL(rt2x00soc_probe);
 110
 111 int rt2x00soc_remove(struct platform_device *pdev)
 112 {
 113         struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 114         struct rt2x00_dev *rt2x00dev = hw->priv;
 115
 116         /*
 117          * Free all allocated data.
 118          */
 119         rt2x00lib_remove_dev(rt2x00dev);
 120         rt2x00soc_free_reg(rt2x00dev);
 121         ieee80211_free_hw(hw);
 122
 123         return 0;
 124 }
 125 EXPORT_SYMBOL_GPL(rt2x00soc_remove);
 126
 127 #ifdef CONFIG_PM
 128 int rt2x00soc_suspend(struct platform_device *pdev, pm_message_t state)
 129 {
 130         struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 131         struct rt2x00_dev *rt2x00dev = hw->priv;
 132
 133         return rt2x00lib_suspend(rt2x00dev, state);
 134 }
 135 EXPORT_SYMBOL_GPL(rt2x00soc_suspend);
 136
 137 int rt2x00soc_resume(struct platform_device *pdev)
 138 {
 139         struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 140         struct rt2x00_dev *rt2x00dev = hw->priv;
 141
 142         return rt2x00lib_resume(rt2x00dev);
 143 }
 144 EXPORT_SYMBOL_GPL(rt2x00soc_resume);
 145 #endif /* CONFIG_PM */
 146
 147 /*
 148  * rt2x00soc module information.
 149  */
 150 MODULE_AUTHOR(DRV_PROJECT);
 151 MODULE_VERSION(DRV_VERSION);
 152 MODULE_DESCRIPTION("rt2x00 soc library");
 153 MODULE_LICENSE("GPL");