/*
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* AT86RF230/RF231 driver
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*
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* Copyright (C) 2009-2012 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Written by:
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
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* Alexander Aring <aar@pengutronix.de>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/hrtimer.h>
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#include <linux/jiffies.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include <linux/spi/spi.h>
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#include <linux/spi/at86rf230.h>
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#include <linux/regmap.h>
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#include <linux/skbuff.h>
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#include <linux/of_gpio.h>
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#include <linux/ieee802154.h>
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#include <linux/debugfs.h>
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#include <net/mac802154.h>
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#include <net/cfg802154.h>
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#include "at86rf230.h"
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struct at86rf230_local;
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/* at86rf2xx chip depend data.
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* All timings are in us.
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*/
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struct at86rf2xx_chip_data {
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u16 t_sleep_cycle;
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u16 t_channel_switch;
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u16 t_reset_to_off;
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u16 t_off_to_aack;
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u16 t_off_to_tx_on;
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u16 t_off_to_sleep;
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u16 t_sleep_to_off;
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u16 t_frame;
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u16 t_p_ack;
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int rssi_base_val;
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int (*set_channel)(struct at86rf230_local *, u8, u8);
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int (*set_txpower)(struct at86rf230_local *, s32);
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};
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#define AT86RF2XX_MAX_BUF (127 + 3)
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/* tx retries to access the TX_ON state
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* if it's above then force change will be started.
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*
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* We assume the max_frame_retries (7) value of 802.15.4 here.
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*/
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#define AT86RF2XX_MAX_TX_RETRIES 7
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/* We use the recommended 5 minutes timeout to recalibrate */
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#define AT86RF2XX_CAL_LOOP_TIMEOUT (5 * 60 * HZ)
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struct at86rf230_state_change {
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struct at86rf230_local *lp;
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int irq;
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struct hrtimer timer;
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struct spi_message msg;
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struct spi_transfer trx;
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u8 buf[AT86RF2XX_MAX_BUF];
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void (*complete)(void *context);
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u8 from_state;
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u8 to_state;
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bool free;
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};
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struct at86rf230_trac {
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u64 success;
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u64 success_data_pending;
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u64 success_wait_for_ack;
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u64 channel_access_failure;
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u64 no_ack;
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u64 invalid;
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};
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struct at86rf230_local {
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struct spi_device *spi;
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struct ieee802154_hw *hw;
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struct at86rf2xx_chip_data *data;
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struct regmap *regmap;
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int slp_tr;
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bool sleep;
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struct completion state_complete;
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struct at86rf230_state_change state;
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unsigned long cal_timeout;
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bool is_tx;
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bool is_tx_from_off;
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bool was_tx;
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u8 tx_retry;
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struct sk_buff *tx_skb;
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struct at86rf230_state_change tx;
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struct at86rf230_trac trac;
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};
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#define AT86RF2XX_NUMREGS 0x3F
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static void
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at86rf230_async_state_change(struct at86rf230_local *lp,
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struct at86rf230_state_change *ctx,
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const u8 state, void (*complete)(void *context));
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static inline void
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at86rf230_sleep(struct at86rf230_local *lp)
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{
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if (gpio_is_valid(lp->slp_tr)) {
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gpio_set_value(lp->slp_tr, 1);
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usleep_range(lp->data->t_off_to_sleep,
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lp->data->t_off_to_sleep + 10);
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lp->sleep = true;
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}
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}
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static inline void
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at86rf230_awake(struct at86rf230_local *lp)
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{
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if (gpio_is_valid(lp->slp_tr)) {
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gpio_set_value(lp->slp_tr, 0);
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usleep_range(lp->data->t_sleep_to_off,
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lp->data->t_sleep_to_off + 100);
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lp->sleep = false;
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}
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}
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static inline int
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__at86rf230_write(struct at86rf230_local *lp,
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unsigned int addr, unsigned int data)
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{
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bool sleep = lp->sleep;
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int ret;
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/* awake for register setting if sleep */
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if (sleep)
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at86rf230_awake(lp);
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ret = regmap_write(lp->regmap, addr, data);
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/* sleep again if was sleeping */
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if (sleep)
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at86rf230_sleep(lp);
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return ret;
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}
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static inline int
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__at86rf230_read(struct at86rf230_local *lp,
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unsigned int addr, unsigned int *data)
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{
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bool sleep = lp->sleep;
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int ret;
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/* awake for register setting if sleep */
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if (sleep)
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at86rf230_awake(lp);
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ret = regmap_read(lp->regmap, addr, data);
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/* sleep again if was sleeping */
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if (sleep)
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at86rf230_sleep(lp);
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return ret;
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}
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static inline int
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at86rf230_read_subreg(struct at86rf230_local *lp,
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unsigned int addr, unsigned int mask,
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unsigned int shift, unsigned int *data)
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{
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int rc;
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rc = __at86rf230_read(lp, addr, data);
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if (!rc)
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*data = (*data & mask) >> shift;
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return rc;
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}
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static inline int
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at86rf230_write_subreg(struct at86rf230_local *lp,
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unsigned int addr, unsigned int mask,
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unsigned int shift, unsigned int data)
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{
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bool sleep = lp->sleep;
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int ret;
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/* awake for register setting if sleep */
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if (sleep)
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at86rf230_awake(lp);
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ret = regmap_update_bits(lp->regmap, addr, mask, data << shift);
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/* sleep again if was sleeping */
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if (sleep)
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at86rf230_sleep(lp);
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return ret;
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}
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static inline void
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at86rf230_slp_tr_rising_edge(struct at86rf230_local *lp)
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{
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gpio_set_value(lp->slp_tr, 1);
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udelay(1);
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gpio_set_value(lp->slp_tr, 0);
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}
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static bool
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at86rf230_reg_writeable(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case RG_TRX_STATE:
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case RG_TRX_CTRL_0:
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case RG_TRX_CTRL_1:
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case RG_PHY_TX_PWR:
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case RG_PHY_ED_LEVEL:
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case RG_PHY_CC_CCA:
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case RG_CCA_THRES:
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case RG_RX_CTRL:
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case RG_SFD_VALUE:
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case RG_TRX_CTRL_2:
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case RG_ANT_DIV:
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case RG_IRQ_MASK:
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case RG_VREG_CTRL:
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case RG_BATMON:
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case RG_XOSC_CTRL:
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case RG_RX_SYN:
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case RG_XAH_CTRL_1:
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case RG_FTN_CTRL:
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case RG_PLL_CF:
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case RG_PLL_DCU:
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case RG_SHORT_ADDR_0:
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case RG_SHORT_ADDR_1:
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case RG_PAN_ID_0:
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case RG_PAN_ID_1:
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case RG_IEEE_ADDR_0:
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case RG_IEEE_ADDR_1:
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case RG_IEEE_ADDR_2:
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case RG_IEEE_ADDR_3:
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case RG_IEEE_ADDR_4:
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case RG_IEEE_ADDR_5:
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case RG_IEEE_ADDR_6:
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case RG_IEEE_ADDR_7:
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case RG_XAH_CTRL_0:
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case RG_CSMA_SEED_0:
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case RG_CSMA_SEED_1:
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case RG_CSMA_BE:
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return true;
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default:
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return false;
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}
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}
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static bool
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at86rf230_reg_readable(struct device *dev, unsigned int reg)
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{
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bool rc;
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/* all writeable are also readable */
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rc = at86rf230_reg_writeable(dev, reg);
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if (rc)
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return rc;
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/* readonly regs */
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switch (reg) {
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case RG_TRX_STATUS:
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case RG_PHY_RSSI:
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case RG_IRQ_STATUS:
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case RG_PART_NUM:
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case RG_VERSION_NUM:
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case RG_MAN_ID_1:
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case RG_MAN_ID_0:
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return true;
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default:
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return false;
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}
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}
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static bool
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at86rf230_reg_volatile(struct device *dev, unsigned int reg)
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{
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/* can be changed during runtime */
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switch (reg) {
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case RG_TRX_STATUS:
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case RG_TRX_STATE:
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case RG_PHY_RSSI:
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case RG_PHY_ED_LEVEL:
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case RG_IRQ_STATUS:
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case RG_VREG_CTRL:
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case RG_PLL_CF:
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case RG_PLL_DCU:
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return true;
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default:
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return false;
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}
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}
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static bool
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at86rf230_reg_precious(struct device *dev, unsigned int reg)
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{
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/* don't clear irq line on read */
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switch (reg) {
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case RG_IRQ_STATUS:
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return true;
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default:
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return false;
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}
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}
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static const struct regmap_config at86rf230_regmap_spi_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.write_flag_mask = CMD_REG | CMD_WRITE,
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.read_flag_mask = CMD_REG,
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.cache_type = REGCACHE_RBTREE,
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.max_register = AT86RF2XX_NUMREGS,
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.writeable_reg = at86rf230_reg_writeable,
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.readable_reg = at86rf230_reg_readable,
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.volatile_reg = at86rf230_reg_volatile,
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.precious_reg = at86rf230_reg_precious,
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};
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static void
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at86rf230_async_error_recover_complete(void *context)
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{
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struct at86rf230_state_change *ctx = context;
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struct at86rf230_local *lp = ctx->lp;
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if (ctx->free)
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kfree(ctx);
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if (lp->was_tx) {
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lp->was_tx = 0;
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dev_kfree_skb_any(lp->tx_skb);
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ieee802154_wake_queue(lp->hw);
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}
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}
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static void
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at86rf230_async_error_recover(void *context)
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{
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struct at86rf230_state_change *ctx = context;
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struct at86rf230_local *lp = ctx->lp;
|
|
if (lp->is_tx) {
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lp->was_tx = 1;
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lp->is_tx = 0;
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}
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at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON,
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at86rf230_async_error_recover_complete);
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}
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static inline void
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at86rf230_async_error(struct at86rf230_local *lp,
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struct at86rf230_state_change *ctx, int rc)
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{
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dev_err(&lp->spi->dev, "spi_async error %d\n", rc);
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at86rf230_async_state_change(lp, ctx, STATE_FORCE_TRX_OFF,
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at86rf230_async_error_recover);
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}
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/* Generic function to get some register value in async mode */
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static void
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at86rf230_async_read_reg(struct at86rf230_local *lp, u8 reg,
|
struct at86rf230_state_change *ctx,
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void (*complete)(void *context))
|
{
|
int rc;
|
|
u8 *tx_buf = ctx->buf;
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tx_buf[0] = (reg & CMD_REG_MASK) | CMD_REG;
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ctx->msg.complete = complete;
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rc = spi_async(lp->spi, &ctx->msg);
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if (rc)
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at86rf230_async_error(lp, ctx, rc);
|
}
|
|
static void
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at86rf230_async_write_reg(struct at86rf230_local *lp, u8 reg, u8 val,
|
struct at86rf230_state_change *ctx,
|
void (*complete)(void *context))
|
{
|
int rc;
|
|
ctx->buf[0] = (reg & CMD_REG_MASK) | CMD_REG | CMD_WRITE;
|
ctx->buf[1] = val;
|
ctx->msg.complete = complete;
|
rc = spi_async(lp->spi, &ctx->msg);
|
if (rc)
|
at86rf230_async_error(lp, ctx, rc);
|
}
|
|
static void
|
at86rf230_async_state_assert(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
const u8 *buf = ctx->buf;
|
const u8 trx_state = buf[1] & TRX_STATE_MASK;
|
|
/* Assert state change */
|
if (trx_state != ctx->to_state) {
|
/* Special handling if transceiver state is in
|
* STATE_BUSY_RX_AACK and a SHR was detected.
|
*/
|
if (trx_state == STATE_BUSY_RX_AACK) {
|
/* Undocumented race condition. If we send a state
|
* change to STATE_RX_AACK_ON the transceiver could
|
* change his state automatically to STATE_BUSY_RX_AACK
|
* if a SHR was detected. This is not an error, but we
|
* can't assert this.
|
*/
|
if (ctx->to_state == STATE_RX_AACK_ON)
|
goto done;
|
|
/* If we change to STATE_TX_ON without forcing and
|
* transceiver state is STATE_BUSY_RX_AACK, we wait
|
* 'tFrame + tPAck' receiving time. In this time the
|
* PDU should be received. If the transceiver is still
|
* in STATE_BUSY_RX_AACK, we run a force state change
|
* to STATE_TX_ON. This is a timeout handling, if the
|
* transceiver stucks in STATE_BUSY_RX_AACK.
|
*
|
* Additional we do several retries to try to get into
|
* TX_ON state without forcing. If the retries are
|
* higher or equal than AT86RF2XX_MAX_TX_RETRIES we
|
* will do a force change.
|
*/
|
if (ctx->to_state == STATE_TX_ON ||
|
ctx->to_state == STATE_TRX_OFF) {
|
u8 state = ctx->to_state;
|
|
if (lp->tx_retry >= AT86RF2XX_MAX_TX_RETRIES)
|
state = STATE_FORCE_TRX_OFF;
|
lp->tx_retry++;
|
|
at86rf230_async_state_change(lp, ctx, state,
|
ctx->complete);
|
return;
|
}
|
}
|
|
dev_warn(&lp->spi->dev, "unexcept state change from 0x%02x to 0x%02x. Actual state: 0x%02x\n",
|
ctx->from_state, ctx->to_state, trx_state);
|
}
|
|
done:
|
if (ctx->complete)
|
ctx->complete(context);
|
}
|
|
static enum hrtimer_restart at86rf230_async_state_timer(struct hrtimer *timer)
|
{
|
struct at86rf230_state_change *ctx =
|
container_of(timer, struct at86rf230_state_change, timer);
|
struct at86rf230_local *lp = ctx->lp;
|
|
at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
|
at86rf230_async_state_assert);
|
|
return HRTIMER_NORESTART;
|
}
|
|
/* Do state change timing delay. */
|
static void
|
at86rf230_async_state_delay(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
struct at86rf2xx_chip_data *c = lp->data;
|
bool force = false;
|
ktime_t tim;
|
|
/* The force state changes are will show as normal states in the
|
* state status subregister. We change the to_state to the
|
* corresponding one and remember if it was a force change, this
|
* differs if we do a state change from STATE_BUSY_RX_AACK.
|
*/
|
switch (ctx->to_state) {
|
case STATE_FORCE_TX_ON:
|
ctx->to_state = STATE_TX_ON;
|
force = true;
|
break;
|
case STATE_FORCE_TRX_OFF:
|
ctx->to_state = STATE_TRX_OFF;
|
force = true;
|
break;
|
default:
|
break;
|
}
|
|
switch (ctx->from_state) {
|
case STATE_TRX_OFF:
|
switch (ctx->to_state) {
|
case STATE_RX_AACK_ON:
|
tim = c->t_off_to_aack * NSEC_PER_USEC;
|
/* state change from TRX_OFF to RX_AACK_ON to do a
|
* calibration, we need to reset the timeout for the
|
* next one.
|
*/
|
lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
|
goto change;
|
case STATE_TX_ARET_ON:
|
case STATE_TX_ON:
|
tim = c->t_off_to_tx_on * NSEC_PER_USEC;
|
/* state change from TRX_OFF to TX_ON or ARET_ON to do
|
* a calibration, we need to reset the timeout for the
|
* next one.
|
*/
|
lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
|
goto change;
|
default:
|
break;
|
}
|
break;
|
case STATE_BUSY_RX_AACK:
|
switch (ctx->to_state) {
|
case STATE_TRX_OFF:
|
case STATE_TX_ON:
|
/* Wait for worst case receiving time if we
|
* didn't make a force change from BUSY_RX_AACK
|
* to TX_ON or TRX_OFF.
|
*/
|
if (!force) {
|
tim = (c->t_frame + c->t_p_ack) * NSEC_PER_USEC;
|
goto change;
|
}
|
break;
|
default:
|
break;
|
}
|
break;
|
/* Default value, means RESET state */
|
case STATE_P_ON:
|
switch (ctx->to_state) {
|
case STATE_TRX_OFF:
|
tim = c->t_reset_to_off * NSEC_PER_USEC;
|
goto change;
|
default:
|
break;
|
}
|
break;
|
default:
|
break;
|
}
|
|
/* Default delay is 1us in the most cases */
|
udelay(1);
|
at86rf230_async_state_timer(&ctx->timer);
|
return;
|
|
change:
|
hrtimer_start(&ctx->timer, tim, HRTIMER_MODE_REL);
|
}
|
|
static void
|
at86rf230_async_state_change_start(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
u8 *buf = ctx->buf;
|
const u8 trx_state = buf[1] & TRX_STATE_MASK;
|
|
/* Check for "possible" STATE_TRANSITION_IN_PROGRESS */
|
if (trx_state == STATE_TRANSITION_IN_PROGRESS) {
|
udelay(1);
|
at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
|
at86rf230_async_state_change_start);
|
return;
|
}
|
|
/* Check if we already are in the state which we change in */
|
if (trx_state == ctx->to_state) {
|
if (ctx->complete)
|
ctx->complete(context);
|
return;
|
}
|
|
/* Set current state to the context of state change */
|
ctx->from_state = trx_state;
|
|
/* Going into the next step for a state change which do a timing
|
* relevant delay.
|
*/
|
at86rf230_async_write_reg(lp, RG_TRX_STATE, ctx->to_state, ctx,
|
at86rf230_async_state_delay);
|
}
|
|
static void
|
at86rf230_async_state_change(struct at86rf230_local *lp,
|
struct at86rf230_state_change *ctx,
|
const u8 state, void (*complete)(void *context))
|
{
|
/* Initialization for the state change context */
|
ctx->to_state = state;
|
ctx->complete = complete;
|
at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
|
at86rf230_async_state_change_start);
|
}
|
|
static void
|
at86rf230_sync_state_change_complete(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
|
complete(&lp->state_complete);
|
}
|
|
/* This function do a sync framework above the async state change.
|
* Some callbacks of the IEEE 802.15.4 driver interface need to be
|
* handled synchronously.
|
*/
|
static int
|
at86rf230_sync_state_change(struct at86rf230_local *lp, unsigned int state)
|
{
|
unsigned long rc;
|
|
at86rf230_async_state_change(lp, &lp->state, state,
|
at86rf230_sync_state_change_complete);
|
|
rc = wait_for_completion_timeout(&lp->state_complete,
|
msecs_to_jiffies(100));
|
if (!rc) {
|
at86rf230_async_error(lp, &lp->state, -ETIMEDOUT);
|
return -ETIMEDOUT;
|
}
|
|
return 0;
|
}
|
|
static void
|
at86rf230_tx_complete(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
|
ieee802154_xmit_complete(lp->hw, lp->tx_skb, false);
|
kfree(ctx);
|
}
|
|
static void
|
at86rf230_tx_on(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
|
at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON,
|
at86rf230_tx_complete);
|
}
|
|
static void
|
at86rf230_tx_trac_check(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
|
if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS)) {
|
u8 trac = TRAC_MASK(ctx->buf[1]);
|
|
switch (trac) {
|
case TRAC_SUCCESS:
|
lp->trac.success++;
|
break;
|
case TRAC_SUCCESS_DATA_PENDING:
|
lp->trac.success_data_pending++;
|
break;
|
case TRAC_CHANNEL_ACCESS_FAILURE:
|
lp->trac.channel_access_failure++;
|
break;
|
case TRAC_NO_ACK:
|
lp->trac.no_ack++;
|
break;
|
case TRAC_INVALID:
|
lp->trac.invalid++;
|
break;
|
default:
|
WARN_ONCE(1, "received tx trac status %d\n", trac);
|
break;
|
}
|
}
|
|
at86rf230_async_state_change(lp, ctx, STATE_TX_ON, at86rf230_tx_on);
|
}
|
|
static void
|
at86rf230_rx_read_frame_complete(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
const u8 *buf = ctx->buf;
|
struct sk_buff *skb;
|
u8 len, lqi;
|
|
len = buf[1];
|
if (!ieee802154_is_valid_psdu_len(len)) {
|
dev_vdbg(&lp->spi->dev, "corrupted frame received\n");
|
len = IEEE802154_MTU;
|
}
|
lqi = buf[2 + len];
|
|
skb = dev_alloc_skb(IEEE802154_MTU);
|
if (!skb) {
|
dev_vdbg(&lp->spi->dev, "failed to allocate sk_buff\n");
|
kfree(ctx);
|
return;
|
}
|
|
skb_put_data(skb, buf + 2, len);
|
ieee802154_rx_irqsafe(lp->hw, skb, lqi);
|
kfree(ctx);
|
}
|
|
static void
|
at86rf230_rx_trac_check(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
u8 *buf = ctx->buf;
|
int rc;
|
|
if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS)) {
|
u8 trac = TRAC_MASK(buf[1]);
|
|
switch (trac) {
|
case TRAC_SUCCESS:
|
lp->trac.success++;
|
break;
|
case TRAC_SUCCESS_WAIT_FOR_ACK:
|
lp->trac.success_wait_for_ack++;
|
break;
|
case TRAC_INVALID:
|
lp->trac.invalid++;
|
break;
|
default:
|
WARN_ONCE(1, "received rx trac status %d\n", trac);
|
break;
|
}
|
}
|
|
buf[0] = CMD_FB;
|
ctx->trx.len = AT86RF2XX_MAX_BUF;
|
ctx->msg.complete = at86rf230_rx_read_frame_complete;
|
rc = spi_async(lp->spi, &ctx->msg);
|
if (rc) {
|
ctx->trx.len = 2;
|
at86rf230_async_error(lp, ctx, rc);
|
}
|
}
|
|
static void
|
at86rf230_irq_trx_end(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
|
if (lp->is_tx) {
|
lp->is_tx = 0;
|
at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
|
at86rf230_tx_trac_check);
|
} else {
|
at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
|
at86rf230_rx_trac_check);
|
}
|
}
|
|
static void
|
at86rf230_irq_status(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
const u8 *buf = ctx->buf;
|
u8 irq = buf[1];
|
|
enable_irq(lp->spi->irq);
|
|
if (irq & IRQ_TRX_END) {
|
at86rf230_irq_trx_end(ctx);
|
} else {
|
dev_err(&lp->spi->dev, "not supported irq %02x received\n",
|
irq);
|
kfree(ctx);
|
}
|
}
|
|
static void
|
at86rf230_setup_spi_messages(struct at86rf230_local *lp,
|
struct at86rf230_state_change *state)
|
{
|
state->lp = lp;
|
state->irq = lp->spi->irq;
|
spi_message_init(&state->msg);
|
state->msg.context = state;
|
state->trx.len = 2;
|
state->trx.tx_buf = state->buf;
|
state->trx.rx_buf = state->buf;
|
spi_message_add_tail(&state->trx, &state->msg);
|
hrtimer_init(&state->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
|
state->timer.function = at86rf230_async_state_timer;
|
}
|
|
static irqreturn_t at86rf230_isr(int irq, void *data)
|
{
|
struct at86rf230_local *lp = data;
|
struct at86rf230_state_change *ctx;
|
int rc;
|
|
disable_irq_nosync(irq);
|
|
ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
|
if (!ctx) {
|
enable_irq(irq);
|
return IRQ_NONE;
|
}
|
|
at86rf230_setup_spi_messages(lp, ctx);
|
/* tell on error handling to free ctx */
|
ctx->free = true;
|
|
ctx->buf[0] = (RG_IRQ_STATUS & CMD_REG_MASK) | CMD_REG;
|
ctx->msg.complete = at86rf230_irq_status;
|
rc = spi_async(lp->spi, &ctx->msg);
|
if (rc) {
|
at86rf230_async_error(lp, ctx, rc);
|
enable_irq(irq);
|
return IRQ_NONE;
|
}
|
|
return IRQ_HANDLED;
|
}
|
|
static void
|
at86rf230_write_frame_complete(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
|
ctx->trx.len = 2;
|
|
if (gpio_is_valid(lp->slp_tr))
|
at86rf230_slp_tr_rising_edge(lp);
|
else
|
at86rf230_async_write_reg(lp, RG_TRX_STATE, STATE_BUSY_TX, ctx,
|
NULL);
|
}
|
|
static void
|
at86rf230_write_frame(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
struct sk_buff *skb = lp->tx_skb;
|
u8 *buf = ctx->buf;
|
int rc;
|
|
lp->is_tx = 1;
|
|
buf[0] = CMD_FB | CMD_WRITE;
|
buf[1] = skb->len + 2;
|
memcpy(buf + 2, skb->data, skb->len);
|
ctx->trx.len = skb->len + 2;
|
ctx->msg.complete = at86rf230_write_frame_complete;
|
rc = spi_async(lp->spi, &ctx->msg);
|
if (rc) {
|
ctx->trx.len = 2;
|
at86rf230_async_error(lp, ctx, rc);
|
}
|
}
|
|
static void
|
at86rf230_xmit_tx_on(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
|
at86rf230_async_state_change(lp, ctx, STATE_TX_ARET_ON,
|
at86rf230_write_frame);
|
}
|
|
static void
|
at86rf230_xmit_start(void *context)
|
{
|
struct at86rf230_state_change *ctx = context;
|
struct at86rf230_local *lp = ctx->lp;
|
|
/* check if we change from off state */
|
if (lp->is_tx_from_off)
|
at86rf230_async_state_change(lp, ctx, STATE_TX_ARET_ON,
|
at86rf230_write_frame);
|
else
|
at86rf230_async_state_change(lp, ctx, STATE_TX_ON,
|
at86rf230_xmit_tx_on);
|
}
|
|
static int
|
at86rf230_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
|
{
|
struct at86rf230_local *lp = hw->priv;
|
struct at86rf230_state_change *ctx = &lp->tx;
|
|
lp->tx_skb = skb;
|
lp->tx_retry = 0;
|
|
/* After 5 minutes in PLL and the same frequency we run again the
|
* calibration loops which is recommended by at86rf2xx datasheets.
|
*
|
* The calibration is initiate by a state change from TRX_OFF
|
* to TX_ON, the lp->cal_timeout should be reinit by state_delay
|
* function then to start in the next 5 minutes.
|
*/
|
if (time_is_before_jiffies(lp->cal_timeout)) {
|
lp->is_tx_from_off = true;
|
at86rf230_async_state_change(lp, ctx, STATE_TRX_OFF,
|
at86rf230_xmit_start);
|
} else {
|
lp->is_tx_from_off = false;
|
at86rf230_xmit_start(ctx);
|
}
|
|
return 0;
|
}
|
|
static int
|
at86rf230_ed(struct ieee802154_hw *hw, u8 *level)
|
{
|
WARN_ON(!level);
|
*level = 0xbe;
|
return 0;
|
}
|
|
static int
|
at86rf230_start(struct ieee802154_hw *hw)
|
{
|
struct at86rf230_local *lp = hw->priv;
|
|
/* reset trac stats on start */
|
if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS))
|
memset(&lp->trac, 0, sizeof(struct at86rf230_trac));
|
|
at86rf230_awake(lp);
|
enable_irq(lp->spi->irq);
|
|
return at86rf230_sync_state_change(lp, STATE_RX_AACK_ON);
|
}
|
|
static void
|
at86rf230_stop(struct ieee802154_hw *hw)
|
{
|
struct at86rf230_local *lp = hw->priv;
|
u8 csma_seed[2];
|
|
at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);
|
|
disable_irq(lp->spi->irq);
|
|
/* It's recommended to set random new csma_seeds before sleep state.
|
* Makes only sense in the stop callback, not doing this inside of
|
* at86rf230_sleep, this is also used when we don't transmit afterwards
|
* when calling start callback again.
|
*/
|
get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));
|
at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0]);
|
at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1]);
|
|
at86rf230_sleep(lp);
|
}
|
|
static int
|
at86rf23x_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
|
{
|
return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
|
}
|
|
#define AT86RF2XX_MAX_ED_LEVELS 0xF
|
static const s32 at86rf233_ed_levels[AT86RF2XX_MAX_ED_LEVELS + 1] = {
|
-9400, -9200, -9000, -8800, -8600, -8400, -8200, -8000, -7800, -7600,
|
-7400, -7200, -7000, -6800, -6600, -6400,
|
};
|
|
static const s32 at86rf231_ed_levels[AT86RF2XX_MAX_ED_LEVELS + 1] = {
|
-9100, -8900, -8700, -8500, -8300, -8100, -7900, -7700, -7500, -7300,
|
-7100, -6900, -6700, -6500, -6300, -6100,
|
};
|
|
static const s32 at86rf212_ed_levels_100[AT86RF2XX_MAX_ED_LEVELS + 1] = {
|
-10000, -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200,
|
-8000, -7800, -7600, -7400, -7200, -7000,
|
};
|
|
static const s32 at86rf212_ed_levels_98[AT86RF2XX_MAX_ED_LEVELS + 1] = {
|
-9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200, -8000,
|
-7800, -7600, -7400, -7200, -7000, -6800,
|
};
|
|
static inline int
|
at86rf212_update_cca_ed_level(struct at86rf230_local *lp, int rssi_base_val)
|
{
|
unsigned int cca_ed_thres;
|
int rc;
|
|
rc = at86rf230_read_subreg(lp, SR_CCA_ED_THRES, &cca_ed_thres);
|
if (rc < 0)
|
return rc;
|
|
switch (rssi_base_val) {
|
case -98:
|
lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_98;
|
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_98);
|
lp->hw->phy->cca_ed_level = at86rf212_ed_levels_98[cca_ed_thres];
|
break;
|
case -100:
|
lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
|
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
|
lp->hw->phy->cca_ed_level = at86rf212_ed_levels_100[cca_ed_thres];
|
break;
|
default:
|
WARN_ON(1);
|
}
|
|
return 0;
|
}
|
|
static int
|
at86rf212_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
|
{
|
int rc;
|
|
if (channel == 0)
|
rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 0);
|
else
|
rc = at86rf230_write_subreg(lp, SR_SUB_MODE, 1);
|
if (rc < 0)
|
return rc;
|
|
if (page == 0) {
|
rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 0);
|
lp->data->rssi_base_val = -100;
|
} else {
|
rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 1);
|
lp->data->rssi_base_val = -98;
|
}
|
if (rc < 0)
|
return rc;
|
|
rc = at86rf212_update_cca_ed_level(lp, lp->data->rssi_base_val);
|
if (rc < 0)
|
return rc;
|
|
/* This sets the symbol_duration according frequency on the 212.
|
* TODO move this handling while set channel and page in cfg802154.
|
* We can do that, this timings are according 802.15.4 standard.
|
* If we do that in cfg802154, this is a more generic calculation.
|
*
|
* This should also protected from ifs_timer. Means cancel timer and
|
* init with a new value. For now, this is okay.
|
*/
|
if (channel == 0) {
|
if (page == 0) {
|
/* SUB:0 and BPSK:0 -> BPSK-20 */
|
lp->hw->phy->symbol_duration = 50;
|
} else {
|
/* SUB:1 and BPSK:0 -> BPSK-40 */
|
lp->hw->phy->symbol_duration = 25;
|
}
|
} else {
|
if (page == 0)
|
/* SUB:0 and BPSK:1 -> OQPSK-100/200/400 */
|
lp->hw->phy->symbol_duration = 40;
|
else
|
/* SUB:1 and BPSK:1 -> OQPSK-250/500/1000 */
|
lp->hw->phy->symbol_duration = 16;
|
}
|
|
lp->hw->phy->lifs_period = IEEE802154_LIFS_PERIOD *
|
lp->hw->phy->symbol_duration;
|
lp->hw->phy->sifs_period = IEEE802154_SIFS_PERIOD *
|
lp->hw->phy->symbol_duration;
|
|
return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
|
}
|
|
static int
|
at86rf230_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
|
{
|
struct at86rf230_local *lp = hw->priv;
|
int rc;
|
|
rc = lp->data->set_channel(lp, page, channel);
|
/* Wait for PLL */
|
usleep_range(lp->data->t_channel_switch,
|
lp->data->t_channel_switch + 10);
|
|
lp->cal_timeout = jiffies + AT86RF2XX_CAL_LOOP_TIMEOUT;
|
return rc;
|
}
|
|
static int
|
at86rf230_set_hw_addr_filt(struct ieee802154_hw *hw,
|
struct ieee802154_hw_addr_filt *filt,
|
unsigned long changed)
|
{
|
struct at86rf230_local *lp = hw->priv;
|
|
if (changed & IEEE802154_AFILT_SADDR_CHANGED) {
|
u16 addr = le16_to_cpu(filt->short_addr);
|
|
dev_vdbg(&lp->spi->dev, "%s called for saddr\n", __func__);
|
__at86rf230_write(lp, RG_SHORT_ADDR_0, addr);
|
__at86rf230_write(lp, RG_SHORT_ADDR_1, addr >> 8);
|
}
|
|
if (changed & IEEE802154_AFILT_PANID_CHANGED) {
|
u16 pan = le16_to_cpu(filt->pan_id);
|
|
dev_vdbg(&lp->spi->dev, "%s called for pan id\n", __func__);
|
__at86rf230_write(lp, RG_PAN_ID_0, pan);
|
__at86rf230_write(lp, RG_PAN_ID_1, pan >> 8);
|
}
|
|
if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {
|
u8 i, addr[8];
|
|
memcpy(addr, &filt->ieee_addr, 8);
|
dev_vdbg(&lp->spi->dev, "%s called for IEEE addr\n", __func__);
|
for (i = 0; i < 8; i++)
|
__at86rf230_write(lp, RG_IEEE_ADDR_0 + i, addr[i]);
|
}
|
|
if (changed & IEEE802154_AFILT_PANC_CHANGED) {
|
dev_vdbg(&lp->spi->dev, "%s called for panc change\n", __func__);
|
if (filt->pan_coord)
|
at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 1);
|
else
|
at86rf230_write_subreg(lp, SR_AACK_I_AM_COORD, 0);
|
}
|
|
return 0;
|
}
|
|
#define AT86RF23X_MAX_TX_POWERS 0xF
|
static const s32 at86rf233_powers[AT86RF23X_MAX_TX_POWERS + 1] = {
|
400, 370, 340, 300, 250, 200, 100, 0, -100, -200, -300, -400, -600,
|
-800, -1200, -1700,
|
};
|
|
static const s32 at86rf231_powers[AT86RF23X_MAX_TX_POWERS + 1] = {
|
300, 280, 230, 180, 130, 70, 0, -100, -200, -300, -400, -500, -700,
|
-900, -1200, -1700,
|
};
|
|
#define AT86RF212_MAX_TX_POWERS 0x1F
|
static const s32 at86rf212_powers[AT86RF212_MAX_TX_POWERS + 1] = {
|
500, 400, 300, 200, 100, 0, -100, -200, -300, -400, -500, -600, -700,
|
-800, -900, -1000, -1100, -1200, -1300, -1400, -1500, -1600, -1700,
|
-1800, -1900, -2000, -2100, -2200, -2300, -2400, -2500, -2600,
|
};
|
|
static int
|
at86rf23x_set_txpower(struct at86rf230_local *lp, s32 mbm)
|
{
|
u32 i;
|
|
for (i = 0; i < lp->hw->phy->supported.tx_powers_size; i++) {
|
if (lp->hw->phy->supported.tx_powers[i] == mbm)
|
return at86rf230_write_subreg(lp, SR_TX_PWR_23X, i);
|
}
|
|
return -EINVAL;
|
}
|
|
static int
|
at86rf212_set_txpower(struct at86rf230_local *lp, s32 mbm)
|
{
|
u32 i;
|
|
for (i = 0; i < lp->hw->phy->supported.tx_powers_size; i++) {
|
if (lp->hw->phy->supported.tx_powers[i] == mbm)
|
return at86rf230_write_subreg(lp, SR_TX_PWR_212, i);
|
}
|
|
return -EINVAL;
|
}
|
|
static int
|
at86rf230_set_txpower(struct ieee802154_hw *hw, s32 mbm)
|
{
|
struct at86rf230_local *lp = hw->priv;
|
|
return lp->data->set_txpower(lp, mbm);
|
}
|
|
static int
|
at86rf230_set_lbt(struct ieee802154_hw *hw, bool on)
|
{
|
struct at86rf230_local *lp = hw->priv;
|
|
return at86rf230_write_subreg(lp, SR_CSMA_LBT_MODE, on);
|
}
|
|
static int
|
at86rf230_set_cca_mode(struct ieee802154_hw *hw,
|
const struct wpan_phy_cca *cca)
|
{
|
struct at86rf230_local *lp = hw->priv;
|
u8 val;
|
|
/* mapping 802.15.4 to driver spec */
|
switch (cca->mode) {
|
case NL802154_CCA_ENERGY:
|
val = 1;
|
break;
|
case NL802154_CCA_CARRIER:
|
val = 2;
|
break;
|
case NL802154_CCA_ENERGY_CARRIER:
|
switch (cca->opt) {
|
case NL802154_CCA_OPT_ENERGY_CARRIER_AND:
|
val = 3;
|
break;
|
case NL802154_CCA_OPT_ENERGY_CARRIER_OR:
|
val = 0;
|
break;
|
default:
|
return -EINVAL;
|
}
|
break;
|
default:
|
return -EINVAL;
|
}
|
|
return at86rf230_write_subreg(lp, SR_CCA_MODE, val);
|
}
|
|
static int
|
at86rf230_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)
|
{
|
struct at86rf230_local *lp = hw->priv;
|
u32 i;
|
|
for (i = 0; i < hw->phy->supported.cca_ed_levels_size; i++) {
|
if (hw->phy->supported.cca_ed_levels[i] == mbm)
|
return at86rf230_write_subreg(lp, SR_CCA_ED_THRES, i);
|
}
|
|
return -EINVAL;
|
}
|
|
static int
|
at86rf230_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be,
|
u8 retries)
|
{
|
struct at86rf230_local *lp = hw->priv;
|
int rc;
|
|
rc = at86rf230_write_subreg(lp, SR_MIN_BE, min_be);
|
if (rc)
|
return rc;
|
|
rc = at86rf230_write_subreg(lp, SR_MAX_BE, max_be);
|
if (rc)
|
return rc;
|
|
return at86rf230_write_subreg(lp, SR_MAX_CSMA_RETRIES, retries);
|
}
|
|
static int
|
at86rf230_set_frame_retries(struct ieee802154_hw *hw, s8 retries)
|
{
|
struct at86rf230_local *lp = hw->priv;
|
|
return at86rf230_write_subreg(lp, SR_MAX_FRAME_RETRIES, retries);
|
}
|
|
static int
|
at86rf230_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
|
{
|
struct at86rf230_local *lp = hw->priv;
|
int rc;
|
|
if (on) {
|
rc = at86rf230_write_subreg(lp, SR_AACK_DIS_ACK, 1);
|
if (rc < 0)
|
return rc;
|
|
rc = at86rf230_write_subreg(lp, SR_AACK_PROM_MODE, 1);
|
if (rc < 0)
|
return rc;
|
} else {
|
rc = at86rf230_write_subreg(lp, SR_AACK_PROM_MODE, 0);
|
if (rc < 0)
|
return rc;
|
|
rc = at86rf230_write_subreg(lp, SR_AACK_DIS_ACK, 0);
|
if (rc < 0)
|
return rc;
|
}
|
|
return 0;
|
}
|
|
static const struct ieee802154_ops at86rf230_ops = {
|
.owner = THIS_MODULE,
|
.xmit_async = at86rf230_xmit,
|
.ed = at86rf230_ed,
|
.set_channel = at86rf230_channel,
|
.start = at86rf230_start,
|
.stop = at86rf230_stop,
|
.set_hw_addr_filt = at86rf230_set_hw_addr_filt,
|
.set_txpower = at86rf230_set_txpower,
|
.set_lbt = at86rf230_set_lbt,
|
.set_cca_mode = at86rf230_set_cca_mode,
|
.set_cca_ed_level = at86rf230_set_cca_ed_level,
|
.set_csma_params = at86rf230_set_csma_params,
|
.set_frame_retries = at86rf230_set_frame_retries,
|
.set_promiscuous_mode = at86rf230_set_promiscuous_mode,
|
};
|
|
static struct at86rf2xx_chip_data at86rf233_data = {
|
.t_sleep_cycle = 330,
|
.t_channel_switch = 11,
|
.t_reset_to_off = 26,
|
.t_off_to_aack = 80,
|
.t_off_to_tx_on = 80,
|
.t_off_to_sleep = 35,
|
.t_sleep_to_off = 1000,
|
.t_frame = 4096,
|
.t_p_ack = 545,
|
.rssi_base_val = -94,
|
.set_channel = at86rf23x_set_channel,
|
.set_txpower = at86rf23x_set_txpower,
|
};
|
|
static struct at86rf2xx_chip_data at86rf231_data = {
|
.t_sleep_cycle = 330,
|
.t_channel_switch = 24,
|
.t_reset_to_off = 37,
|
.t_off_to_aack = 110,
|
.t_off_to_tx_on = 110,
|
.t_off_to_sleep = 35,
|
.t_sleep_to_off = 1000,
|
.t_frame = 4096,
|
.t_p_ack = 545,
|
.rssi_base_val = -91,
|
.set_channel = at86rf23x_set_channel,
|
.set_txpower = at86rf23x_set_txpower,
|
};
|
|
static struct at86rf2xx_chip_data at86rf212_data = {
|
.t_sleep_cycle = 330,
|
.t_channel_switch = 11,
|
.t_reset_to_off = 26,
|
.t_off_to_aack = 200,
|
.t_off_to_tx_on = 200,
|
.t_off_to_sleep = 35,
|
.t_sleep_to_off = 1000,
|
.t_frame = 4096,
|
.t_p_ack = 545,
|
.rssi_base_val = -100,
|
.set_channel = at86rf212_set_channel,
|
.set_txpower = at86rf212_set_txpower,
|
};
|
|
static int at86rf230_hw_init(struct at86rf230_local *lp, u8 xtal_trim)
|
{
|
int rc, irq_type, irq_pol = IRQ_ACTIVE_HIGH;
|
unsigned int dvdd;
|
u8 csma_seed[2];
|
|
rc = at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);
|
if (rc)
|
return rc;
|
|
irq_type = irq_get_trigger_type(lp->spi->irq);
|
if (irq_type == IRQ_TYPE_EDGE_FALLING ||
|
irq_type == IRQ_TYPE_LEVEL_LOW)
|
irq_pol = IRQ_ACTIVE_LOW;
|
|
rc = at86rf230_write_subreg(lp, SR_IRQ_POLARITY, irq_pol);
|
if (rc)
|
return rc;
|
|
rc = at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1);
|
if (rc)
|
return rc;
|
|
rc = at86rf230_write_subreg(lp, SR_IRQ_MASK, IRQ_TRX_END);
|
if (rc)
|
return rc;
|
|
/* reset values differs in at86rf231 and at86rf233 */
|
rc = at86rf230_write_subreg(lp, SR_IRQ_MASK_MODE, 0);
|
if (rc)
|
return rc;
|
|
get_random_bytes(csma_seed, ARRAY_SIZE(csma_seed));
|
rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_0, csma_seed[0]);
|
if (rc)
|
return rc;
|
rc = at86rf230_write_subreg(lp, SR_CSMA_SEED_1, csma_seed[1]);
|
if (rc)
|
return rc;
|
|
/* CLKM changes are applied immediately */
|
rc = at86rf230_write_subreg(lp, SR_CLKM_SHA_SEL, 0x00);
|
if (rc)
|
return rc;
|
|
/* Turn CLKM Off */
|
rc = at86rf230_write_subreg(lp, SR_CLKM_CTRL, 0x00);
|
if (rc)
|
return rc;
|
/* Wait the next SLEEP cycle */
|
usleep_range(lp->data->t_sleep_cycle,
|
lp->data->t_sleep_cycle + 100);
|
|
/* xtal_trim value is calculated by:
|
* CL = 0.5 * (CX + CTRIM + CPAR)
|
*
|
* whereas:
|
* CL = capacitor of used crystal
|
* CX = connected capacitors at xtal pins
|
* CPAR = in all at86rf2xx datasheets this is a constant value 3 pF,
|
* but this is different on each board setup. You need to fine
|
* tuning this value via CTRIM.
|
* CTRIM = variable capacitor setting. Resolution is 0.3 pF range is
|
* 0 pF upto 4.5 pF.
|
*
|
* Examples:
|
* atben transceiver:
|
*
|
* CL = 8 pF
|
* CX = 12 pF
|
* CPAR = 3 pF (We assume the magic constant from datasheet)
|
* CTRIM = 0.9 pF
|
*
|
* (12+0.9+3)/2 = 7.95 which is nearly at 8 pF
|
*
|
* xtal_trim = 0x3
|
*
|
* openlabs transceiver:
|
*
|
* CL = 16 pF
|
* CX = 22 pF
|
* CPAR = 3 pF (We assume the magic constant from datasheet)
|
* CTRIM = 4.5 pF
|
*
|
* (22+4.5+3)/2 = 14.75 which is the nearest value to 16 pF
|
*
|
* xtal_trim = 0xf
|
*/
|
rc = at86rf230_write_subreg(lp, SR_XTAL_TRIM, xtal_trim);
|
if (rc)
|
return rc;
|
|
rc = at86rf230_read_subreg(lp, SR_DVDD_OK, &dvdd);
|
if (rc)
|
return rc;
|
if (!dvdd) {
|
dev_err(&lp->spi->dev, "DVDD error\n");
|
return -EINVAL;
|
}
|
|
/* Force setting slotted operation bit to 0. Sometimes the atben
|
* sets this bit and I don't know why. We set this always force
|
* to zero while probing.
|
*/
|
return at86rf230_write_subreg(lp, SR_SLOTTED_OPERATION, 0);
|
}
|
|
static int
|
at86rf230_get_pdata(struct spi_device *spi, int *rstn, int *slp_tr,
|
u8 *xtal_trim)
|
{
|
struct at86rf230_platform_data *pdata = spi->dev.platform_data;
|
int ret;
|
|
if (!IS_ENABLED(CONFIG_OF) || !spi->dev.of_node) {
|
if (!pdata)
|
return -ENOENT;
|
|
*rstn = pdata->rstn;
|
*slp_tr = pdata->slp_tr;
|
*xtal_trim = pdata->xtal_trim;
|
return 0;
|
}
|
|
*rstn = of_get_named_gpio(spi->dev.of_node, "reset-gpio", 0);
|
*slp_tr = of_get_named_gpio(spi->dev.of_node, "sleep-gpio", 0);
|
ret = of_property_read_u8(spi->dev.of_node, "xtal-trim", xtal_trim);
|
if (ret < 0 && ret != -EINVAL)
|
return ret;
|
|
return 0;
|
}
|
|
static int
|
at86rf230_detect_device(struct at86rf230_local *lp)
|
{
|
unsigned int part, version, val;
|
u16 man_id = 0;
|
const char *chip;
|
int rc;
|
|
rc = __at86rf230_read(lp, RG_MAN_ID_0, &val);
|
if (rc)
|
return rc;
|
man_id |= val;
|
|
rc = __at86rf230_read(lp, RG_MAN_ID_1, &val);
|
if (rc)
|
return rc;
|
man_id |= (val << 8);
|
|
rc = __at86rf230_read(lp, RG_PART_NUM, &part);
|
if (rc)
|
return rc;
|
|
rc = __at86rf230_read(lp, RG_VERSION_NUM, &version);
|
if (rc)
|
return rc;
|
|
if (man_id != 0x001f) {
|
dev_err(&lp->spi->dev, "Non-Atmel dev found (MAN_ID %02x %02x)\n",
|
man_id >> 8, man_id & 0xFF);
|
return -EINVAL;
|
}
|
|
lp->hw->flags = IEEE802154_HW_TX_OMIT_CKSUM |
|
IEEE802154_HW_CSMA_PARAMS |
|
IEEE802154_HW_FRAME_RETRIES | IEEE802154_HW_AFILT |
|
IEEE802154_HW_PROMISCUOUS;
|
|
lp->hw->phy->flags = WPAN_PHY_FLAG_TXPOWER |
|
WPAN_PHY_FLAG_CCA_ED_LEVEL |
|
WPAN_PHY_FLAG_CCA_MODE;
|
|
lp->hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) |
|
BIT(NL802154_CCA_CARRIER) | BIT(NL802154_CCA_ENERGY_CARRIER);
|
lp->hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) |
|
BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR);
|
|
lp->hw->phy->cca.mode = NL802154_CCA_ENERGY;
|
|
switch (part) {
|
case 2:
|
chip = "at86rf230";
|
rc = -ENOTSUPP;
|
goto not_supp;
|
case 3:
|
chip = "at86rf231";
|
lp->data = &at86rf231_data;
|
lp->hw->phy->supported.channels[0] = 0x7FFF800;
|
lp->hw->phy->current_channel = 11;
|
lp->hw->phy->symbol_duration = 16;
|
lp->hw->phy->supported.tx_powers = at86rf231_powers;
|
lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf231_powers);
|
lp->hw->phy->supported.cca_ed_levels = at86rf231_ed_levels;
|
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf231_ed_levels);
|
break;
|
case 7:
|
chip = "at86rf212";
|
lp->data = &at86rf212_data;
|
lp->hw->flags |= IEEE802154_HW_LBT;
|
lp->hw->phy->supported.channels[0] = 0x00007FF;
|
lp->hw->phy->supported.channels[2] = 0x00007FF;
|
lp->hw->phy->current_channel = 5;
|
lp->hw->phy->symbol_duration = 25;
|
lp->hw->phy->supported.lbt = NL802154_SUPPORTED_BOOL_BOTH;
|
lp->hw->phy->supported.tx_powers = at86rf212_powers;
|
lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf212_powers);
|
lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
|
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
|
break;
|
case 11:
|
chip = "at86rf233";
|
lp->data = &at86rf233_data;
|
lp->hw->phy->supported.channels[0] = 0x7FFF800;
|
lp->hw->phy->current_channel = 13;
|
lp->hw->phy->symbol_duration = 16;
|
lp->hw->phy->supported.tx_powers = at86rf233_powers;
|
lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf233_powers);
|
lp->hw->phy->supported.cca_ed_levels = at86rf233_ed_levels;
|
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf233_ed_levels);
|
break;
|
default:
|
chip = "unknown";
|
rc = -ENOTSUPP;
|
goto not_supp;
|
}
|
|
lp->hw->phy->cca_ed_level = lp->hw->phy->supported.cca_ed_levels[7];
|
lp->hw->phy->transmit_power = lp->hw->phy->supported.tx_powers[0];
|
|
not_supp:
|
dev_info(&lp->spi->dev, "Detected %s chip version %d\n", chip, version);
|
|
return rc;
|
}
|
|
#ifdef CONFIG_IEEE802154_AT86RF230_DEBUGFS
|
static struct dentry *at86rf230_debugfs_root;
|
|
static int at86rf230_stats_show(struct seq_file *file, void *offset)
|
{
|
struct at86rf230_local *lp = file->private;
|
|
seq_printf(file, "SUCCESS:\t\t%8llu\n", lp->trac.success);
|
seq_printf(file, "SUCCESS_DATA_PENDING:\t%8llu\n",
|
lp->trac.success_data_pending);
|
seq_printf(file, "SUCCESS_WAIT_FOR_ACK:\t%8llu\n",
|
lp->trac.success_wait_for_ack);
|
seq_printf(file, "CHANNEL_ACCESS_FAILURE:\t%8llu\n",
|
lp->trac.channel_access_failure);
|
seq_printf(file, "NO_ACK:\t\t\t%8llu\n", lp->trac.no_ack);
|
seq_printf(file, "INVALID:\t\t%8llu\n", lp->trac.invalid);
|
return 0;
|
}
|
|
static int at86rf230_stats_open(struct inode *inode, struct file *file)
|
{
|
return single_open(file, at86rf230_stats_show, inode->i_private);
|
}
|
|
static const struct file_operations at86rf230_stats_fops = {
|
.open = at86rf230_stats_open,
|
.read = seq_read,
|
.llseek = seq_lseek,
|
.release = single_release,
|
};
|
|
static int at86rf230_debugfs_init(struct at86rf230_local *lp)
|
{
|
char debugfs_dir_name[DNAME_INLINE_LEN + 1] = "at86rf230-";
|
struct dentry *stats;
|
|
strncat(debugfs_dir_name, dev_name(&lp->spi->dev), DNAME_INLINE_LEN);
|
|
at86rf230_debugfs_root = debugfs_create_dir(debugfs_dir_name, NULL);
|
if (!at86rf230_debugfs_root)
|
return -ENOMEM;
|
|
stats = debugfs_create_file("trac_stats", 0444,
|
at86rf230_debugfs_root, lp,
|
&at86rf230_stats_fops);
|
if (!stats)
|
return -ENOMEM;
|
|
return 0;
|
}
|
|
static void at86rf230_debugfs_remove(void)
|
{
|
debugfs_remove_recursive(at86rf230_debugfs_root);
|
}
|
#else
|
static int at86rf230_debugfs_init(struct at86rf230_local *lp) { return 0; }
|
static void at86rf230_debugfs_remove(void) { }
|
#endif
|
|
static int at86rf230_probe(struct spi_device *spi)
|
{
|
struct ieee802154_hw *hw;
|
struct at86rf230_local *lp;
|
unsigned int status;
|
int rc, irq_type, rstn, slp_tr;
|
u8 xtal_trim = 0;
|
|
if (!spi->irq) {
|
dev_err(&spi->dev, "no IRQ specified\n");
|
return -EINVAL;
|
}
|
|
rc = at86rf230_get_pdata(spi, &rstn, &slp_tr, &xtal_trim);
|
if (rc < 0) {
|
dev_err(&spi->dev, "failed to parse platform_data: %d\n", rc);
|
return rc;
|
}
|
|
if (gpio_is_valid(rstn)) {
|
rc = devm_gpio_request_one(&spi->dev, rstn,
|
GPIOF_OUT_INIT_HIGH, "rstn");
|
if (rc)
|
return rc;
|
}
|
|
if (gpio_is_valid(slp_tr)) {
|
rc = devm_gpio_request_one(&spi->dev, slp_tr,
|
GPIOF_OUT_INIT_LOW, "slp_tr");
|
if (rc)
|
return rc;
|
}
|
|
/* Reset */
|
if (gpio_is_valid(rstn)) {
|
udelay(1);
|
gpio_set_value_cansleep(rstn, 0);
|
udelay(1);
|
gpio_set_value_cansleep(rstn, 1);
|
usleep_range(120, 240);
|
}
|
|
hw = ieee802154_alloc_hw(sizeof(*lp), &at86rf230_ops);
|
if (!hw)
|
return -ENOMEM;
|
|
lp = hw->priv;
|
lp->hw = hw;
|
lp->spi = spi;
|
lp->slp_tr = slp_tr;
|
hw->parent = &spi->dev;
|
ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
|
|
lp->regmap = devm_regmap_init_spi(spi, &at86rf230_regmap_spi_config);
|
if (IS_ERR(lp->regmap)) {
|
rc = PTR_ERR(lp->regmap);
|
dev_err(&spi->dev, "Failed to allocate register map: %d\n",
|
rc);
|
goto free_dev;
|
}
|
|
at86rf230_setup_spi_messages(lp, &lp->state);
|
at86rf230_setup_spi_messages(lp, &lp->tx);
|
|
rc = at86rf230_detect_device(lp);
|
if (rc < 0)
|
goto free_dev;
|
|
init_completion(&lp->state_complete);
|
|
spi_set_drvdata(spi, lp);
|
|
rc = at86rf230_hw_init(lp, xtal_trim);
|
if (rc)
|
goto free_dev;
|
|
/* Read irq status register to reset irq line */
|
rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0xff, 0, &status);
|
if (rc)
|
goto free_dev;
|
|
irq_type = irq_get_trigger_type(spi->irq);
|
if (!irq_type)
|
irq_type = IRQF_TRIGGER_HIGH;
|
|
rc = devm_request_irq(&spi->dev, spi->irq, at86rf230_isr,
|
IRQF_SHARED | irq_type, dev_name(&spi->dev), lp);
|
if (rc)
|
goto free_dev;
|
|
/* disable_irq by default and wait for starting hardware */
|
disable_irq(spi->irq);
|
|
/* going into sleep by default */
|
at86rf230_sleep(lp);
|
|
rc = at86rf230_debugfs_init(lp);
|
if (rc)
|
goto free_dev;
|
|
rc = ieee802154_register_hw(lp->hw);
|
if (rc)
|
goto free_debugfs;
|
|
return rc;
|
|
free_debugfs:
|
at86rf230_debugfs_remove();
|
free_dev:
|
ieee802154_free_hw(lp->hw);
|
|
return rc;
|
}
|
|
static int at86rf230_remove(struct spi_device *spi)
|
{
|
struct at86rf230_local *lp = spi_get_drvdata(spi);
|
|
/* mask all at86rf230 irq's */
|
at86rf230_write_subreg(lp, SR_IRQ_MASK, 0);
|
ieee802154_unregister_hw(lp->hw);
|
ieee802154_free_hw(lp->hw);
|
at86rf230_debugfs_remove();
|
dev_dbg(&spi->dev, "unregistered at86rf230\n");
|
|
return 0;
|
}
|
|
static const struct of_device_id at86rf230_of_match[] = {
|
{ .compatible = "atmel,at86rf230", },
|
{ .compatible = "atmel,at86rf231", },
|
{ .compatible = "atmel,at86rf233", },
|
{ .compatible = "atmel,at86rf212", },
|
{ },
|
};
|
MODULE_DEVICE_TABLE(of, at86rf230_of_match);
|
|
static const struct spi_device_id at86rf230_device_id[] = {
|
{ .name = "at86rf230", },
|
{ .name = "at86rf231", },
|
{ .name = "at86rf233", },
|
{ .name = "at86rf212", },
|
{ },
|
};
|
MODULE_DEVICE_TABLE(spi, at86rf230_device_id);
|
|
static struct spi_driver at86rf230_driver = {
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.id_table = at86rf230_device_id,
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.driver = {
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.of_match_table = of_match_ptr(at86rf230_of_match),
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.name = "at86rf230",
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},
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.probe = at86rf230_probe,
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.remove = at86rf230_remove,
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};
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module_spi_driver(at86rf230_driver);
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MODULE_DESCRIPTION("AT86RF230 Transceiver Driver");
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MODULE_LICENSE("GPL v2");
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