LXR linux/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
  23static 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
  34static 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
  57exit:
  58        rt2x00_probe_err("Failed to allocate registers\n");
  59        rt2x00soc_free_reg(rt2x00dev);
  60
  61        return -ENOMEM;
  62}
  63
  64int 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
 101exit_free_reg:
 102        rt2x00soc_free_reg(rt2x00dev);
 103
 104exit_free_device:
 105        ieee80211_free_hw(hw);
 106
 107        return retval;
 108}
 109EXPORT_SYMBOL_GPL(rt2x00soc_probe);
 110
 111int 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}
 125EXPORT_SYMBOL_GPL(rt2x00soc_remove);
 126
 127#ifdef CONFIG_PM
 128int 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);
 134}
 135EXPORT_SYMBOL_GPL(rt2x00soc_suspend);
 136
 137int 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}
 144EXPORT_SYMBOL_GPL(rt2x00soc_resume);
 145#endif /* CONFIG_PM */
 146
 147/*
 148 * rt2x00soc module information.
 149 */
 150MODULE_AUTHOR(DRV_PROJECT);
 151MODULE_VERSION(DRV_VERSION);
 152MODULE_DESCRIPTION("rt2x00 soc library");
 153MODULE_LICENSE("GPL");
 154