Quelle  rt2800soc.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-or-later
/* Copyright (C) 2009 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
 * Copyright (C) 2009 Alban Browaeys <prahal@yahoo.com>
 * Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
 * Copyright (C) 2009 Luis Correia <luis.f.correia@gmail.com>
 * Copyright (C) 2009 Mattias Nissler <mattias.nissler@gmx.de>
 * Copyright (C) 2009 Mark Asselstine <asselsm@gmail.com>
 * Copyright (C) 2009 Xose Vazquez Perez <xose.vazquez@gmail.com>
 * Copyright (C) 2009 Bart Zolnierkiewicz <bzolnier@gmail.com>
 * <http://rt2x00.serialmonkey.com>
 */

/* Module: rt2800soc
 * Abstract: rt2800 WiSoC specific routines.
 */

#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>

#include "rt2x00.h"
#include "rt2x00mmio.h"
#include "rt2800.h"
#include "rt2800lib.h"
#include "rt2800mmio.h"

/* Allow hardware encryption to be disabled. */
static bool modparam_nohwcrypt;
module_param_named(nohwcrypt, modparam_nohwcrypt, bool, 0444);
MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");

static bool rt2800soc_hwcrypt_disabled(struct rt2x00_dev *rt2x00dev)
{
 return modparam_nohwcrypt;
}

static void rt2800soc_disable_radio(struct rt2x00_dev *rt2x00dev)
{
 u32 reg;

 rt2800_disable_radio(rt2x00dev);
 rt2x00mmio_register_write(rt2x00dev, PWR_PIN_CFG, 0);

 reg = 0;
 if (rt2x00_rt(rt2x00dev, RT3883))
  rt2x00_set_field32(®, TX_PIN_CFG_RFTR_EN, 1);

 rt2x00mmio_register_write(rt2x00dev, TX_PIN_CFG, reg);
}

static int rt2800soc_set_device_state(struct rt2x00_dev *rt2x00dev,
          enum dev_state state)
{
 int retval = 0;

 switch (state) {
 case STATE_RADIO_ON:
  retval = rt2800mmio_enable_radio(rt2x00dev);
  break;

 case STATE_RADIO_OFF:
  rt2800soc_disable_radio(rt2x00dev);
  break;

 case STATE_RADIO_IRQ_ON:
 case STATE_RADIO_IRQ_OFF:
  rt2800mmio_toggle_irq(rt2x00dev, state);
  break;

 case STATE_DEEP_SLEEP:
 case STATE_SLEEP:
 case STATE_STANDBY:
 case STATE_AWAKE:
  /* These states are not supported, but don't report an error */
  retval = 0;
  break;

 default:
  retval = -ENOTSUPP;
  break;
 }

 if (unlikely(retval))
  rt2x00_err(rt2x00dev, "Device failed to enter state %d (%d)\n",
      state, retval);

 return retval;
}

static int rt2800soc_read_eeprom(struct rt2x00_dev *rt2x00dev)
{
 void __iomem *base_addr = ioremap(0x1F040000, EEPROM_SIZE);

 if (!base_addr)
  return -ENOMEM;

 memcpy_fromio(rt2x00dev->eeprom, base_addr, EEPROM_SIZE);

 iounmap(base_addr);
 return 0;
}

/* Firmware functions */
static char *rt2800soc_get_firmware_name(struct rt2x00_dev *rt2x00dev)
{
 WARN_ON_ONCE(1);
 return NULL;
}

static int rt2800soc_load_firmware(struct rt2x00_dev *rt2x00dev,
       const u8 *data, const size_t len)
{
 WARN_ON_ONCE(1);
 return 0;
}

static int rt2800soc_check_firmware(struct rt2x00_dev *rt2x00dev,
        const u8 *data, const size_t len)
{
 WARN_ON_ONCE(1);
 return 0;
}

static int rt2800soc_write_firmware(struct rt2x00_dev *rt2x00dev,
        const u8 *data, const size_t len)
{
 WARN_ON_ONCE(1);
 return 0;
}

#ifdef CONFIG_PM
static int rt2800soc_suspend(struct platform_device *pdev, pm_message_t state)
{
 struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 struct rt2x00_dev *rt2x00dev = hw->priv;

 return rt2x00lib_suspend(rt2x00dev);
}

static int rt2800soc_resume(struct platform_device *pdev)
{
 struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 struct rt2x00_dev *rt2x00dev = hw->priv;

 return rt2x00lib_resume(rt2x00dev);
}
#endif /* CONFIG_PM */

static const struct ieee80211_ops rt2800soc_mac80211_ops = {
 .add_chanctx = ieee80211_emulate_add_chanctx,
 .remove_chanctx = ieee80211_emulate_remove_chanctx,
 .change_chanctx = ieee80211_emulate_change_chanctx,
 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
 .tx   = rt2x00mac_tx,
 .wake_tx_queue  = ieee80211_handle_wake_tx_queue,
 .start   = rt2x00mac_start,
 .stop   = rt2x00mac_stop,
 .add_interface  = rt2x00mac_add_interface,
 .remove_interface = rt2x00mac_remove_interface,
 .config   = rt2x00mac_config,
 .configure_filter = rt2x00mac_configure_filter,
 .set_key  = rt2x00mac_set_key,
 .sw_scan_start  = rt2x00mac_sw_scan_start,
 .sw_scan_complete = rt2x00mac_sw_scan_complete,
 .get_stats  = rt2x00mac_get_stats,
 .get_key_seq  = rt2800_get_key_seq,
 .set_rts_threshold = rt2800_set_rts_threshold,
 .sta_add  = rt2800_sta_add,
 .sta_remove  = rt2800_sta_remove,
 .bss_info_changed = rt2x00mac_bss_info_changed,
 .conf_tx  = rt2800_conf_tx,
 .get_tsf  = rt2800_get_tsf,
 .rfkill_poll  = rt2x00mac_rfkill_poll,
 .ampdu_action  = rt2800_ampdu_action,
 .flush   = rt2x00mac_flush,
 .get_survey  = rt2800_get_survey,
 .get_ringparam  = rt2x00mac_get_ringparam,
 .tx_frames_pending = rt2x00mac_tx_frames_pending,
 .reconfig_complete = rt2x00mac_reconfig_complete,
};

static const struct rt2800_ops rt2800soc_rt2800_ops = {
 .register_read  = rt2x00mmio_register_read,
 .register_read_lock = rt2x00mmio_register_read, /* same for SoCs */
 .register_write  = rt2x00mmio_register_write,
 .register_write_lock = rt2x00mmio_register_write, /* same for SoCs */
 .register_multiread = rt2x00mmio_register_multiread,
 .register_multiwrite = rt2x00mmio_register_multiwrite,
 .regbusy_read  = rt2x00mmio_regbusy_read,
 .read_eeprom  = rt2800soc_read_eeprom,
 .hwcrypt_disabled = rt2800soc_hwcrypt_disabled,
 .drv_write_firmware = rt2800soc_write_firmware,
 .drv_init_registers = rt2800mmio_init_registers,
 .drv_get_txwi  = rt2800mmio_get_txwi,
 .drv_get_dma_done = rt2800mmio_get_dma_done,
};

static const struct rt2x00lib_ops rt2800soc_rt2x00_ops = {
 .irq_handler  = rt2800mmio_interrupt,
 .txstatus_tasklet = rt2800mmio_txstatus_tasklet,
 .pretbtt_tasklet = rt2800mmio_pretbtt_tasklet,
 .tbtt_tasklet  = rt2800mmio_tbtt_tasklet,
 .rxdone_tasklet  = rt2800mmio_rxdone_tasklet,
 .autowake_tasklet = rt2800mmio_autowake_tasklet,
 .probe_hw  = rt2800mmio_probe_hw,
 .get_firmware_name = rt2800soc_get_firmware_name,
 .check_firmware  = rt2800soc_check_firmware,
 .load_firmware  = rt2800soc_load_firmware,
 .initialize  = rt2x00mmio_initialize,
 .uninitialize  = rt2x00mmio_uninitialize,
 .get_entry_state = rt2800mmio_get_entry_state,
 .clear_entry  = rt2800mmio_clear_entry,
 .set_device_state = rt2800soc_set_device_state,
 .rfkill_poll  = rt2800_rfkill_poll,
 .link_stats  = rt2800_link_stats,
 .reset_tuner  = rt2800_reset_tuner,
 .link_tuner  = rt2800_link_tuner,
 .gain_calibration = rt2800_gain_calibration,
 .vco_calibration = rt2800_vco_calibration,
 .watchdog  = rt2800_watchdog,
 .start_queue  = rt2800mmio_start_queue,
 .kick_queue  = rt2800mmio_kick_queue,
 .stop_queue  = rt2800mmio_stop_queue,
 .flush_queue  = rt2800mmio_flush_queue,
 .write_tx_desc  = rt2800mmio_write_tx_desc,
 .write_tx_data  = rt2800_write_tx_data,
 .write_beacon  = rt2800_write_beacon,
 .clear_beacon  = rt2800_clear_beacon,
 .fill_rxdone  = rt2800mmio_fill_rxdone,
 .config_shared_key = rt2800_config_shared_key,
 .config_pairwise_key = rt2800_config_pairwise_key,
 .config_filter  = rt2800_config_filter,
 .config_intf  = rt2800_config_intf,
 .config_erp  = rt2800_config_erp,
 .config_ant  = rt2800_config_ant,
 .config   = rt2800_config,
 .pre_reset_hw  = rt2800_pre_reset_hw,
};

static const struct rt2x00_ops rt2800soc_ops = {
 .name   = KBUILD_MODNAME,
 .drv_data_size  = sizeof(struct rt2800_drv_data),
 .max_ap_intf  = 8,
 .eeprom_size  = EEPROM_SIZE,
 .rf_size  = RF_SIZE,
 .tx_queues  = NUM_TX_QUEUES,
 .queue_init  = rt2800mmio_queue_init,
 .lib   = &rt2800soc_rt2x00_ops,
 .drv   = &rt2800soc_rt2800_ops,
 .hw   = &rt2800soc_mac80211_ops,
#ifdef CONFIG_RT2X00_LIB_DEBUGFS
 .debugfs  = &rt2800_rt2x00debug,
#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
};

static int rt2x00soc_probe(struct platform_device *pdev, const struct rt2x00_ops *ops)
{
 struct rt2x00_dev *rt2x00dev;
 struct ieee80211_hw *hw;
 void __iomem *mem;
 struct clk *clk;
 __le16 *eeprom;
 int retval;
 u32 *rf;
 int irq;

 mem = devm_platform_ioremap_resource(pdev, 0);
 if (IS_ERR(mem))
  return PTR_ERR(mem);

 irq = platform_get_irq(pdev, 0);
 if (irq < 0)
  return irq;

 clk = devm_clk_get_optional(&pdev->dev, NULL);
 if (IS_ERR(clk))
  return PTR_ERR(clk);

 eeprom = devm_kzalloc(&pdev->dev, ops->eeprom_size, GFP_KERNEL);
 if (!eeprom)
  return -ENOMEM;

 rf = devm_kzalloc(&pdev->dev, ops->rf_size, GFP_KERNEL);
 if (!rf)
  return -ENOMEM;

 hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
 if (!hw)
  return dev_err_probe(&pdev->dev, -ENOMEM, "Failed to allocate hardware");

 platform_set_drvdata(pdev, hw);

 rt2x00dev = hw->priv;
 rt2x00dev->dev = &pdev->dev;
 rt2x00dev->ops = ops;
 rt2x00dev->hw = hw;
 rt2x00dev->irq = irq;
 rt2x00dev->clk = clk;
 rt2x00dev->eeprom = eeprom;
 rt2x00dev->rf = rf;
 rt2x00dev->name = pdev->dev.driver->name;
 rt2x00dev->csr.base = mem;

 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);

 retval = rt2x00lib_probe_dev(rt2x00dev);
 if (retval)
  goto exit_free_device;

 return 0;

exit_free_device:
 ieee80211_free_hw(hw);

 return retval;
}

static int rt2800soc_probe(struct platform_device *pdev)
{
 return rt2x00soc_probe(pdev, &rt2800soc_ops);
}

static void rt2800soc_remove(struct platform_device *pdev)
{
 struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 struct rt2x00_dev *rt2x00dev = hw->priv;

 /*
 * Free all allocated data.
 */
 rt2x00lib_remove_dev(rt2x00dev);
 ieee80211_free_hw(hw);
}

static const struct of_device_id rt2880_wmac_match[] = {
 { .compatible = "ralink,rt2880-wifi" },
 {},
};
MODULE_DEVICE_TABLE(of, rt2880_wmac_match);

static struct platform_driver rt2800soc_driver = {
 .driver  = {
  .name  = "rt2800_wmac",
  .of_match_table = rt2880_wmac_match,
 },
 .probe  = rt2800soc_probe,
 .remove  = rt2800soc_remove,
#ifdef CONFIG_PM
 .suspend = rt2800soc_suspend,
 .resume  = rt2800soc_resume,
#endif
};

module_platform_driver(rt2800soc_driver);

MODULE_AUTHOR(DRV_PROJECT);
MODULE_VERSION(DRV_VERSION);
MODULE_DESCRIPTION("Ralink WiSoC Wireless LAN driver.");
MODULE_LICENSE("GPL");