drivers/ieee802154: add support for the at86rf230/231 transceivers
The AT86RF231 is a feature rich, low-power 2.4 GHz radio transceiver designed for industrial and consumer ZigBee/IEEE 802.15.4, 6LoWPAN, RF4CE and high data rate 2.4 GHz ISM band applications. This patch adds support for the Atmel RF230/231 radio transceivers. Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
alex.bluesman.smirnov@gmail.com
David S. Miller
parent
5265f46711
commit
7b8e19b67c
4 changed files with 1003 additions and 0 deletions
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@ -19,6 +19,7 @@ config IEEE802154_FAKEHARD
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This driver can also be built as a module. To do so say M here.
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The module will be called 'fakehard'.
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config IEEE802154_FAKELB
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depends on IEEE802154_DRIVERS && MAC802154
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tristate "IEEE 802.15.4 loopback driver"
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@ -28,3 +29,8 @@ config IEEE802154_FAKELB
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This driver can also be built as a module. To do so say M here.
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The module will be called 'fakelb'.
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config IEEE802154_AT86RF230
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depends on IEEE802154_DRIVERS && MAC802154
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tristate "AT86RF230/231 transceiver driver"
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depends on SPI
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@ -1,2 +1,3 @@
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obj-$(CONFIG_IEEE802154_FAKEHARD) += fakehard.o
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obj-$(CONFIG_IEEE802154_FAKELB) += fakelb.o
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obj-$(CONFIG_IEEE802154_AT86RF230) += at86rf230.o
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965
drivers/ieee802154/at86rf230.c
Normal file
965
drivers/ieee802154/at86rf230.c
Normal file
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@ -0,0 +1,965 @@
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/*
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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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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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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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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/workqueue.h>
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#include <linux/spinlock.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/skbuff.h>
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#include <net/mac802154.h>
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#include <net/wpan-phy.h>
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struct at86rf230_local {
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struct spi_device *spi;
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int rstn, slp_tr, dig2;
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u8 part;
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u8 vers;
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u8 buf[2];
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struct mutex bmux;
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struct work_struct irqwork;
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struct completion tx_complete;
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struct ieee802154_dev *dev;
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spinlock_t lock;
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bool irq_disabled;
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bool is_tx;
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};
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#define RG_TRX_STATUS (0x01)
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#define SR_TRX_STATUS 0x01, 0x1f, 0
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#define SR_RESERVED_01_3 0x01, 0x20, 5
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#define SR_CCA_STATUS 0x01, 0x40, 6
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#define SR_CCA_DONE 0x01, 0x80, 7
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#define RG_TRX_STATE (0x02)
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#define SR_TRX_CMD 0x02, 0x1f, 0
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#define SR_TRAC_STATUS 0x02, 0xe0, 5
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#define RG_TRX_CTRL_0 (0x03)
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#define SR_CLKM_CTRL 0x03, 0x07, 0
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#define SR_CLKM_SHA_SEL 0x03, 0x08, 3
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#define SR_PAD_IO_CLKM 0x03, 0x30, 4
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#define SR_PAD_IO 0x03, 0xc0, 6
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#define RG_TRX_CTRL_1 (0x04)
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#define SR_IRQ_POLARITY 0x04, 0x01, 0
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#define SR_IRQ_MASK_MODE 0x04, 0x02, 1
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#define SR_SPI_CMD_MODE 0x04, 0x0c, 2
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#define SR_RX_BL_CTRL 0x04, 0x10, 4
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#define SR_TX_AUTO_CRC_ON 0x04, 0x20, 5
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#define SR_IRQ_2_EXT_EN 0x04, 0x40, 6
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#define SR_PA_EXT_EN 0x04, 0x80, 7
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#define RG_PHY_TX_PWR (0x05)
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#define SR_TX_PWR 0x05, 0x0f, 0
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#define SR_PA_LT 0x05, 0x30, 4
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#define SR_PA_BUF_LT 0x05, 0xc0, 6
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#define RG_PHY_RSSI (0x06)
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#define SR_RSSI 0x06, 0x1f, 0
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#define SR_RND_VALUE 0x06, 0x60, 5
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#define SR_RX_CRC_VALID 0x06, 0x80, 7
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#define RG_PHY_ED_LEVEL (0x07)
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#define SR_ED_LEVEL 0x07, 0xff, 0
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#define RG_PHY_CC_CCA (0x08)
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#define SR_CHANNEL 0x08, 0x1f, 0
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#define SR_CCA_MODE 0x08, 0x60, 5
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#define SR_CCA_REQUEST 0x08, 0x80, 7
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#define RG_CCA_THRES (0x09)
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#define SR_CCA_ED_THRES 0x09, 0x0f, 0
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#define SR_RESERVED_09_1 0x09, 0xf0, 4
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#define RG_RX_CTRL (0x0a)
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#define SR_PDT_THRES 0x0a, 0x0f, 0
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#define SR_RESERVED_0a_1 0x0a, 0xf0, 4
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#define RG_SFD_VALUE (0x0b)
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#define SR_SFD_VALUE 0x0b, 0xff, 0
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#define RG_TRX_CTRL_2 (0x0c)
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#define SR_OQPSK_DATA_RATE 0x0c, 0x03, 0
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#define SR_RESERVED_0c_2 0x0c, 0x7c, 2
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#define SR_RX_SAFE_MODE 0x0c, 0x80, 7
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#define RG_ANT_DIV (0x0d)
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#define SR_ANT_CTRL 0x0d, 0x03, 0
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#define SR_ANT_EXT_SW_EN 0x0d, 0x04, 2
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#define SR_ANT_DIV_EN 0x0d, 0x08, 3
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#define SR_RESERVED_0d_2 0x0d, 0x70, 4
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#define SR_ANT_SEL 0x0d, 0x80, 7
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#define RG_IRQ_MASK (0x0e)
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#define SR_IRQ_MASK 0x0e, 0xff, 0
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#define RG_IRQ_STATUS (0x0f)
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#define SR_IRQ_0_PLL_LOCK 0x0f, 0x01, 0
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#define SR_IRQ_1_PLL_UNLOCK 0x0f, 0x02, 1
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#define SR_IRQ_2_RX_START 0x0f, 0x04, 2
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#define SR_IRQ_3_TRX_END 0x0f, 0x08, 3
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#define SR_IRQ_4_CCA_ED_DONE 0x0f, 0x10, 4
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#define SR_IRQ_5_AMI 0x0f, 0x20, 5
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#define SR_IRQ_6_TRX_UR 0x0f, 0x40, 6
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#define SR_IRQ_7_BAT_LOW 0x0f, 0x80, 7
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#define RG_VREG_CTRL (0x10)
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#define SR_RESERVED_10_6 0x10, 0x03, 0
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#define SR_DVDD_OK 0x10, 0x04, 2
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#define SR_DVREG_EXT 0x10, 0x08, 3
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#define SR_RESERVED_10_3 0x10, 0x30, 4
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#define SR_AVDD_OK 0x10, 0x40, 6
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#define SR_AVREG_EXT 0x10, 0x80, 7
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#define RG_BATMON (0x11)
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#define SR_BATMON_VTH 0x11, 0x0f, 0
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#define SR_BATMON_HR 0x11, 0x10, 4
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#define SR_BATMON_OK 0x11, 0x20, 5
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#define SR_RESERVED_11_1 0x11, 0xc0, 6
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#define RG_XOSC_CTRL (0x12)
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#define SR_XTAL_TRIM 0x12, 0x0f, 0
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#define SR_XTAL_MODE 0x12, 0xf0, 4
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#define RG_RX_SYN (0x15)
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#define SR_RX_PDT_LEVEL 0x15, 0x0f, 0
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#define SR_RESERVED_15_2 0x15, 0x70, 4
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#define SR_RX_PDT_DIS 0x15, 0x80, 7
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#define RG_XAH_CTRL_1 (0x17)
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#define SR_RESERVED_17_8 0x17, 0x01, 0
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#define SR_AACK_PROM_MODE 0x17, 0x02, 1
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#define SR_AACK_ACK_TIME 0x17, 0x04, 2
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#define SR_RESERVED_17_5 0x17, 0x08, 3
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#define SR_AACK_UPLD_RES_FT 0x17, 0x10, 4
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#define SR_AACK_FLTR_RES_FT 0x17, 0x20, 5
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#define SR_RESERVED_17_2 0x17, 0x40, 6
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#define SR_RESERVED_17_1 0x17, 0x80, 7
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#define RG_FTN_CTRL (0x18)
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#define SR_RESERVED_18_2 0x18, 0x7f, 0
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#define SR_FTN_START 0x18, 0x80, 7
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#define RG_PLL_CF (0x1a)
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#define SR_RESERVED_1a_2 0x1a, 0x7f, 0
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#define SR_PLL_CF_START 0x1a, 0x80, 7
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#define RG_PLL_DCU (0x1b)
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#define SR_RESERVED_1b_3 0x1b, 0x3f, 0
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#define SR_RESERVED_1b_2 0x1b, 0x40, 6
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#define SR_PLL_DCU_START 0x1b, 0x80, 7
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#define RG_PART_NUM (0x1c)
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#define SR_PART_NUM 0x1c, 0xff, 0
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#define RG_VERSION_NUM (0x1d)
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#define SR_VERSION_NUM 0x1d, 0xff, 0
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#define RG_MAN_ID_0 (0x1e)
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#define SR_MAN_ID_0 0x1e, 0xff, 0
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#define RG_MAN_ID_1 (0x1f)
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#define SR_MAN_ID_1 0x1f, 0xff, 0
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#define RG_SHORT_ADDR_0 (0x20)
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#define SR_SHORT_ADDR_0 0x20, 0xff, 0
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#define RG_SHORT_ADDR_1 (0x21)
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#define SR_SHORT_ADDR_1 0x21, 0xff, 0
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#define RG_PAN_ID_0 (0x22)
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#define SR_PAN_ID_0 0x22, 0xff, 0
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#define RG_PAN_ID_1 (0x23)
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#define SR_PAN_ID_1 0x23, 0xff, 0
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#define RG_IEEE_ADDR_0 (0x24)
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#define SR_IEEE_ADDR_0 0x24, 0xff, 0
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#define RG_IEEE_ADDR_1 (0x25)
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#define SR_IEEE_ADDR_1 0x25, 0xff, 0
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#define RG_IEEE_ADDR_2 (0x26)
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#define SR_IEEE_ADDR_2 0x26, 0xff, 0
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#define RG_IEEE_ADDR_3 (0x27)
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#define SR_IEEE_ADDR_3 0x27, 0xff, 0
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#define RG_IEEE_ADDR_4 (0x28)
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#define SR_IEEE_ADDR_4 0x28, 0xff, 0
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#define RG_IEEE_ADDR_5 (0x29)
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#define SR_IEEE_ADDR_5 0x29, 0xff, 0
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#define RG_IEEE_ADDR_6 (0x2a)
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#define SR_IEEE_ADDR_6 0x2a, 0xff, 0
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#define RG_IEEE_ADDR_7 (0x2b)
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#define SR_IEEE_ADDR_7 0x2b, 0xff, 0
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#define RG_XAH_CTRL_0 (0x2c)
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#define SR_SLOTTED_OPERATION 0x2c, 0x01, 0
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#define SR_MAX_CSMA_RETRIES 0x2c, 0x0e, 1
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#define SR_MAX_FRAME_RETRIES 0x2c, 0xf0, 4
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#define RG_CSMA_SEED_0 (0x2d)
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#define SR_CSMA_SEED_0 0x2d, 0xff, 0
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#define RG_CSMA_SEED_1 (0x2e)
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#define SR_CSMA_SEED_1 0x2e, 0x07, 0
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#define SR_AACK_I_AM_COORD 0x2e, 0x08, 3
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#define SR_AACK_DIS_ACK 0x2e, 0x10, 4
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#define SR_AACK_SET_PD 0x2e, 0x20, 5
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#define SR_AACK_FVN_MODE 0x2e, 0xc0, 6
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#define RG_CSMA_BE (0x2f)
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#define SR_MIN_BE 0x2f, 0x0f, 0
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#define SR_MAX_BE 0x2f, 0xf0, 4
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#define CMD_REG 0x80
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#define CMD_REG_MASK 0x3f
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#define CMD_WRITE 0x40
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#define CMD_FB 0x20
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#define IRQ_BAT_LOW (1 << 7)
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#define IRQ_TRX_UR (1 << 6)
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#define IRQ_AMI (1 << 5)
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#define IRQ_CCA_ED (1 << 4)
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#define IRQ_TRX_END (1 << 3)
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#define IRQ_RX_START (1 << 2)
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#define IRQ_PLL_UNL (1 << 1)
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#define IRQ_PLL_LOCK (1 << 0)
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#define STATE_P_ON 0x00 /* BUSY */
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#define STATE_BUSY_RX 0x01
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#define STATE_BUSY_TX 0x02
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#define STATE_FORCE_TRX_OFF 0x03
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#define STATE_FORCE_TX_ON 0x04 /* IDLE */
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/* 0x05 */ /* INVALID_PARAMETER */
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#define STATE_RX_ON 0x06
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/* 0x07 */ /* SUCCESS */
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#define STATE_TRX_OFF 0x08
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#define STATE_TX_ON 0x09
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/* 0x0a - 0x0e */ /* 0x0a - UNSUPPORTED_ATTRIBUTE */
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#define STATE_SLEEP 0x0F
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#define STATE_BUSY_RX_AACK 0x11
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#define STATE_BUSY_TX_ARET 0x12
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#define STATE_BUSY_RX_AACK_ON 0x16
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#define STATE_BUSY_TX_ARET_ON 0x19
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#define STATE_RX_ON_NOCLK 0x1C
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#define STATE_RX_AACK_ON_NOCLK 0x1D
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#define STATE_BUSY_RX_AACK_NOCLK 0x1E
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#define STATE_TRANSITION_IN_PROGRESS 0x1F
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static int
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__at86rf230_write(struct at86rf230_local *lp, u8 addr, u8 data)
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{
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u8 *buf = lp->buf;
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int status;
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struct spi_message msg;
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struct spi_transfer xfer = {
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.len = 2,
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.tx_buf = buf,
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};
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buf[0] = (addr & CMD_REG_MASK) | CMD_REG | CMD_WRITE;
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buf[1] = data;
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dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
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dev_vdbg(&lp->spi->dev, "buf[1] = %02x\n", buf[1]);
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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status = spi_sync(lp->spi, &msg);
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dev_vdbg(&lp->spi->dev, "status = %d\n", status);
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if (msg.status)
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status = msg.status;
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dev_vdbg(&lp->spi->dev, "status = %d\n", status);
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dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
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dev_vdbg(&lp->spi->dev, "buf[1] = %02x\n", buf[1]);
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return status;
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}
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static int
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__at86rf230_read_subreg(struct at86rf230_local *lp,
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u8 addr, u8 mask, int shift, u8 *data)
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{
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u8 *buf = lp->buf;
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int status;
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struct spi_message msg;
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struct spi_transfer xfer = {
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.len = 2,
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.tx_buf = buf,
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.rx_buf = buf,
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};
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buf[0] = (addr & CMD_REG_MASK) | CMD_REG;
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buf[1] = 0xff;
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dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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status = spi_sync(lp->spi, &msg);
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dev_vdbg(&lp->spi->dev, "status = %d\n", status);
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if (msg.status)
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status = msg.status;
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dev_vdbg(&lp->spi->dev, "status = %d\n", status);
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dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
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dev_vdbg(&lp->spi->dev, "buf[1] = %02x\n", buf[1]);
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if (status == 0)
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*data = buf[1];
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return status;
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}
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static int
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at86rf230_read_subreg(struct at86rf230_local *lp,
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u8 addr, u8 mask, int shift, u8 *data)
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{
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int status;
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mutex_lock(&lp->bmux);
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status = __at86rf230_read_subreg(lp, addr, mask, shift, data);
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mutex_unlock(&lp->bmux);
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return status;
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}
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static int
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at86rf230_write_subreg(struct at86rf230_local *lp,
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u8 addr, u8 mask, int shift, u8 data)
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{
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int status;
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u8 val;
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mutex_lock(&lp->bmux);
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status = __at86rf230_read_subreg(lp, addr, 0xff, 0, &val);
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if (status)
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goto out;
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val &= ~mask;
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val |= (data << shift) & mask;
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status = __at86rf230_write(lp, addr, val);
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out:
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mutex_unlock(&lp->bmux);
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return status;
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}
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static int
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at86rf230_write_fbuf(struct at86rf230_local *lp, u8 *data, u8 len)
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{
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u8 *buf = lp->buf;
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int status;
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struct spi_message msg;
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struct spi_transfer xfer_head = {
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||||
.len = 2,
|
||||
.tx_buf = buf,
|
||||
|
||||
};
|
||||
struct spi_transfer xfer_buf = {
|
||||
.len = len,
|
||||
.tx_buf = data,
|
||||
};
|
||||
|
||||
mutex_lock(&lp->bmux);
|
||||
buf[0] = CMD_WRITE | CMD_FB;
|
||||
buf[1] = len + 2; /* 2 bytes for CRC that isn't written */
|
||||
|
||||
dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
|
||||
dev_vdbg(&lp->spi->dev, "buf[1] = %02x\n", buf[1]);
|
||||
|
||||
spi_message_init(&msg);
|
||||
spi_message_add_tail(&xfer_head, &msg);
|
||||
spi_message_add_tail(&xfer_buf, &msg);
|
||||
|
||||
status = spi_sync(lp->spi, &msg);
|
||||
dev_vdbg(&lp->spi->dev, "status = %d\n", status);
|
||||
if (msg.status)
|
||||
status = msg.status;
|
||||
|
||||
dev_vdbg(&lp->spi->dev, "status = %d\n", status);
|
||||
dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
|
||||
dev_vdbg(&lp->spi->dev, "buf[1] = %02x\n", buf[1]);
|
||||
|
||||
mutex_unlock(&lp->bmux);
|
||||
return status;
|
||||
}
|
||||
|
||||
static int
|
||||
at86rf230_read_fbuf(struct at86rf230_local *lp, u8 *data, u8 *len, u8 *lqi)
|
||||
{
|
||||
u8 *buf = lp->buf;
|
||||
int status;
|
||||
struct spi_message msg;
|
||||
struct spi_transfer xfer_head = {
|
||||
.len = 2,
|
||||
.tx_buf = buf,
|
||||
.rx_buf = buf,
|
||||
};
|
||||
struct spi_transfer xfer_head1 = {
|
||||
.len = 2,
|
||||
.tx_buf = buf,
|
||||
.rx_buf = buf,
|
||||
};
|
||||
struct spi_transfer xfer_buf = {
|
||||
.len = 0,
|
||||
.rx_buf = data,
|
||||
};
|
||||
|
||||
mutex_lock(&lp->bmux);
|
||||
|
||||
buf[0] = CMD_FB;
|
||||
buf[1] = 0x00;
|
||||
|
||||
spi_message_init(&msg);
|
||||
spi_message_add_tail(&xfer_head, &msg);
|
||||
|
||||
status = spi_sync(lp->spi, &msg);
|
||||
dev_vdbg(&lp->spi->dev, "status = %d\n", status);
|
||||
|
||||
xfer_buf.len = *(buf + 1) + 1;
|
||||
*len = buf[1];
|
||||
|
||||
buf[0] = CMD_FB;
|
||||
buf[1] = 0x00;
|
||||
|
||||
spi_message_init(&msg);
|
||||
spi_message_add_tail(&xfer_head1, &msg);
|
||||
spi_message_add_tail(&xfer_buf, &msg);
|
||||
|
||||
status = spi_sync(lp->spi, &msg);
|
||||
|
||||
if (msg.status)
|
||||
status = msg.status;
|
||||
|
||||
dev_vdbg(&lp->spi->dev, "status = %d\n", status);
|
||||
dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]);
|
||||
dev_vdbg(&lp->spi->dev, "buf[1] = %02x\n", buf[1]);
|
||||
|
||||
if (status) {
|
||||
if (lqi && (*len > lp->buf[1]))
|
||||
*lqi = data[lp->buf[1]];
|
||||
}
|
||||
mutex_unlock(&lp->bmux);
|
||||
|
||||
return status;
|
||||
}
|
||||
|
||||
static int
|
||||
at86rf230_ed(struct ieee802154_dev *dev, u8 *level)
|
||||
{
|
||||
might_sleep();
|
||||
BUG_ON(!level);
|
||||
*level = 0xbe;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
at86rf230_state(struct ieee802154_dev *dev, int state)
|
||||
{
|
||||
struct at86rf230_local *lp = dev->priv;
|
||||
int rc;
|
||||
u8 val;
|
||||
u8 desired_status;
|
||||
|
||||
might_sleep();
|
||||
|
||||
if (state == STATE_FORCE_TX_ON)
|
||||
desired_status = STATE_TX_ON;
|
||||
else if (state == STATE_FORCE_TRX_OFF)
|
||||
desired_status = STATE_TRX_OFF;
|
||||
else
|
||||
desired_status = state;
|
||||
|
||||
do {
|
||||
rc = at86rf230_read_subreg(lp, SR_TRX_STATUS, &val);
|
||||
if (rc)
|
||||
goto err;
|
||||
} while (val == STATE_TRANSITION_IN_PROGRESS);
|
||||
|
||||
if (val == desired_status)
|
||||
return 0;
|
||||
|
||||
/* state is equal to phy states */
|
||||
rc = at86rf230_write_subreg(lp, SR_TRX_CMD, state);
|
||||
if (rc)
|
||||
goto err;
|
||||
|
||||
do {
|
||||
rc = at86rf230_read_subreg(lp, SR_TRX_STATUS, &val);
|
||||
if (rc)
|
||||
goto err;
|
||||
} while (val == STATE_TRANSITION_IN_PROGRESS);
|
||||
|
||||
|
||||
if (val == desired_status)
|
||||
return 0;
|
||||
|
||||
pr_err("unexpected state change: %d, asked for %d\n", val, state);
|
||||
return -EBUSY;
|
||||
|
||||
err:
|
||||
pr_err("error: %d\n", rc);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int
|
||||
at86rf230_start(struct ieee802154_dev *dev)
|
||||
{
|
||||
struct at86rf230_local *lp = dev->priv;
|
||||
u8 rc;
|
||||
|
||||
rc = at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
return at86rf230_state(dev, STATE_RX_ON);
|
||||
}
|
||||
|
||||
static void
|
||||
at86rf230_stop(struct ieee802154_dev *dev)
|
||||
{
|
||||
at86rf230_state(dev, STATE_FORCE_TRX_OFF);
|
||||
}
|
||||
|
||||
static int
|
||||
at86rf230_channel(struct ieee802154_dev *dev, int page, int channel)
|
||||
{
|
||||
struct at86rf230_local *lp = dev->priv;
|
||||
int rc;
|
||||
|
||||
might_sleep();
|
||||
|
||||
if (page != 0 || channel < 11 || channel > 26) {
|
||||
WARN_ON(1);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
rc = at86rf230_write_subreg(lp, SR_CHANNEL, channel);
|
||||
msleep(1); /* Wait for PLL */
|
||||
dev->phy->current_channel = channel;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
at86rf230_xmit(struct ieee802154_dev *dev, struct sk_buff *skb)
|
||||
{
|
||||
struct at86rf230_local *lp = dev->priv;
|
||||
int rc;
|
||||
unsigned long flags;
|
||||
|
||||
might_sleep();
|
||||
|
||||
rc = at86rf230_state(dev, STATE_FORCE_TX_ON);
|
||||
if (rc)
|
||||
goto err;
|
||||
|
||||
spin_lock_irqsave(&lp->lock, flags);
|
||||
lp->is_tx = 1;
|
||||
INIT_COMPLETION(lp->tx_complete);
|
||||
spin_unlock_irqrestore(&lp->lock, flags);
|
||||
|
||||
rc = at86rf230_write_fbuf(lp, skb->data, skb->len);
|
||||
if (rc)
|
||||
goto err_rx;
|
||||
|
||||
rc = at86rf230_write_subreg(lp, SR_TRX_CMD, STATE_BUSY_TX);
|
||||
if (rc)
|
||||
goto err_rx;
|
||||
|
||||
rc = wait_for_completion_interruptible(&lp->tx_complete);
|
||||
if (rc < 0)
|
||||
goto err_rx;
|
||||
|
||||
rc = at86rf230_start(dev);
|
||||
|
||||
return rc;
|
||||
|
||||
err_rx:
|
||||
at86rf230_start(dev);
|
||||
err:
|
||||
pr_err("error: %d\n", rc);
|
||||
|
||||
spin_lock_irqsave(&lp->lock, flags);
|
||||
lp->is_tx = 0;
|
||||
spin_unlock_irqrestore(&lp->lock, flags);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int at86rf230_rx(struct at86rf230_local *lp)
|
||||
{
|
||||
u8 len = 128, lqi = 0;
|
||||
int rc;
|
||||
struct sk_buff *skb;
|
||||
|
||||
skb = alloc_skb(len, GFP_KERNEL);
|
||||
|
||||
if (!skb)
|
||||
return -ENOMEM;
|
||||
|
||||
if (at86rf230_write_subreg(lp, SR_RX_PDT_DIS, 1) ||
|
||||
at86rf230_read_fbuf(lp, skb_put(skb, len), &len, &lqi) ||
|
||||
at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1) ||
|
||||
at86rf230_write_subreg(lp, SR_RX_PDT_DIS, 0)) {
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (len < 2)
|
||||
goto err;
|
||||
|
||||
skb_trim(skb, len - 2); /* We do not put CRC into the frame */
|
||||
|
||||
ieee802154_rx_irqsafe(lp->dev, skb, lqi);
|
||||
|
||||
dev_dbg(&lp->spi->dev, "READ_FBUF: %d %d %x\n", rc, len, lqi);
|
||||
|
||||
return 0;
|
||||
err:
|
||||
pr_debug("received frame is too small\n");
|
||||
|
||||
kfree_skb(skb);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static struct ieee802154_ops at86rf230_ops = {
|
||||
.owner = THIS_MODULE,
|
||||
.xmit = at86rf230_xmit,
|
||||
.ed = at86rf230_ed,
|
||||
.set_channel = at86rf230_channel,
|
||||
.start = at86rf230_start,
|
||||
.stop = at86rf230_stop,
|
||||
};
|
||||
|
||||
static void at86rf230_irqwork(struct work_struct *work)
|
||||
{
|
||||
struct at86rf230_local *lp =
|
||||
container_of(work, struct at86rf230_local, irqwork);
|
||||
u8 status = 0, val;
|
||||
int rc;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&lp->lock, flags);
|
||||
rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0xff, 0, &val);
|
||||
status |= val;
|
||||
|
||||
status &= ~IRQ_PLL_LOCK; /* ignore */
|
||||
status &= ~IRQ_RX_START; /* ignore */
|
||||
status &= ~IRQ_AMI; /* ignore */
|
||||
status &= ~IRQ_TRX_UR; /* FIXME: possibly handle ???*/
|
||||
|
||||
if (status & IRQ_TRX_END) {
|
||||
status &= ~IRQ_TRX_END;
|
||||
if (lp->is_tx) {
|
||||
lp->is_tx = 0;
|
||||
complete(&lp->tx_complete);
|
||||
} else {
|
||||
at86rf230_rx(lp);
|
||||
}
|
||||
}
|
||||
|
||||
if (lp->irq_disabled) {
|
||||
lp->irq_disabled = 0;
|
||||
enable_irq(lp->spi->irq);
|
||||
}
|
||||
spin_unlock_irqrestore(&lp->lock, flags);
|
||||
}
|
||||
|
||||
static irqreturn_t at86rf230_isr(int irq, void *data)
|
||||
{
|
||||
struct at86rf230_local *lp = data;
|
||||
|
||||
spin_lock(&lp->lock);
|
||||
if (!lp->irq_disabled) {
|
||||
disable_irq_nosync(irq);
|
||||
lp->irq_disabled = 1;
|
||||
}
|
||||
spin_unlock(&lp->lock);
|
||||
|
||||
schedule_work(&lp->irqwork);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
|
||||
static int at86rf230_hw_init(struct at86rf230_local *lp)
|
||||
{
|
||||
u8 status;
|
||||
int rc;
|
||||
|
||||
rc = at86rf230_read_subreg(lp, SR_TRX_STATUS, &status);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
dev_info(&lp->spi->dev, "Status: %02x\n", status);
|
||||
if (status == STATE_P_ON) {
|
||||
rc = at86rf230_write_subreg(lp, SR_TRX_CMD, STATE_TRX_OFF);
|
||||
if (rc)
|
||||
return rc;
|
||||
msleep(1);
|
||||
rc = at86rf230_read_subreg(lp, SR_TRX_STATUS, &status);
|
||||
if (rc)
|
||||
return rc;
|
||||
dev_info(&lp->spi->dev, "Status: %02x\n", status);
|
||||
}
|
||||
|
||||
rc = at86rf230_write_subreg(lp, SR_IRQ_MASK, 0xff); /* IRQ_TRX_UR |
|
||||
* IRQ_CCA_ED |
|
||||
* IRQ_TRX_END |
|
||||
* IRQ_PLL_UNL |
|
||||
* IRQ_PLL_LOCK
|
||||
*/
|
||||
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 */
|
||||
msleep(100);
|
||||
|
||||
rc = at86rf230_write_subreg(lp, SR_TRX_CMD, STATE_TX_ON);
|
||||
if (rc)
|
||||
return rc;
|
||||
msleep(1);
|
||||
|
||||
rc = at86rf230_read_subreg(lp, SR_TRX_STATUS, &status);
|
||||
if (rc)
|
||||
return rc;
|
||||
dev_info(&lp->spi->dev, "Status: %02x\n", status);
|
||||
|
||||
rc = at86rf230_read_subreg(lp, SR_DVDD_OK, &status);
|
||||
if (rc)
|
||||
return rc;
|
||||
if (!status) {
|
||||
dev_err(&lp->spi->dev, "DVDD error\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
rc = at86rf230_read_subreg(lp, SR_AVDD_OK, &status);
|
||||
if (rc)
|
||||
return rc;
|
||||
if (!status) {
|
||||
dev_err(&lp->spi->dev, "AVDD error\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int at86rf230_suspend(struct spi_device *spi, pm_message_t message)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int at86rf230_resume(struct spi_device *spi)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int at86rf230_fill_data(struct spi_device *spi)
|
||||
{
|
||||
struct at86rf230_local *lp = spi_get_drvdata(spi);
|
||||
struct at86rf230_platform_data *pdata = spi->dev.platform_data;
|
||||
|
||||
if (!pdata) {
|
||||
dev_err(&spi->dev, "no platform_data\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
lp->rstn = pdata->rstn;
|
||||
lp->slp_tr = pdata->slp_tr;
|
||||
lp->dig2 = pdata->dig2;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __devinit at86rf230_probe(struct spi_device *spi)
|
||||
{
|
||||
struct ieee802154_dev *dev;
|
||||
struct at86rf230_local *lp;
|
||||
u8 man_id_0, man_id_1;
|
||||
int rc;
|
||||
const char *chip;
|
||||
int supported = 0;
|
||||
|
||||
if (!spi->irq) {
|
||||
dev_err(&spi->dev, "no IRQ specified\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
dev = ieee802154_alloc_device(sizeof(*lp), &at86rf230_ops);
|
||||
if (!dev)
|
||||
return -ENOMEM;
|
||||
|
||||
lp = dev->priv;
|
||||
lp->dev = dev;
|
||||
|
||||
lp->spi = spi;
|
||||
|
||||
dev->priv = lp;
|
||||
dev->parent = &spi->dev;
|
||||
dev->extra_tx_headroom = 0;
|
||||
/* We do support only 2.4 Ghz */
|
||||
dev->phy->channels_supported[0] = 0x7FFF800;
|
||||
dev->flags = IEEE802154_HW_OMIT_CKSUM;
|
||||
|
||||
mutex_init(&lp->bmux);
|
||||
INIT_WORK(&lp->irqwork, at86rf230_irqwork);
|
||||
spin_lock_init(&lp->lock);
|
||||
init_completion(&lp->tx_complete);
|
||||
|
||||
spi_set_drvdata(spi, lp);
|
||||
|
||||
rc = at86rf230_fill_data(spi);
|
||||
if (rc)
|
||||
goto err_fill;
|
||||
|
||||
rc = gpio_request(lp->rstn, "rstn");
|
||||
if (rc)
|
||||
goto err_rstn;
|
||||
|
||||
if (gpio_is_valid(lp->slp_tr)) {
|
||||
rc = gpio_request(lp->slp_tr, "slp_tr");
|
||||
if (rc)
|
||||
goto err_slp_tr;
|
||||
}
|
||||
|
||||
rc = gpio_direction_output(lp->rstn, 1);
|
||||
if (rc)
|
||||
goto err_gpio_dir;
|
||||
|
||||
if (gpio_is_valid(lp->slp_tr)) {
|
||||
rc = gpio_direction_output(lp->slp_tr, 0);
|
||||
if (rc)
|
||||
goto err_gpio_dir;
|
||||
}
|
||||
|
||||
/* Reset */
|
||||
msleep(1);
|
||||
gpio_set_value(lp->rstn, 0);
|
||||
msleep(1);
|
||||
gpio_set_value(lp->rstn, 1);
|
||||
msleep(1);
|
||||
|
||||
rc = at86rf230_read_subreg(lp, SR_MAN_ID_0, &man_id_0);
|
||||
if (rc)
|
||||
goto err_gpio_dir;
|
||||
rc = at86rf230_read_subreg(lp, SR_MAN_ID_1, &man_id_1);
|
||||
if (rc)
|
||||
goto err_gpio_dir;
|
||||
|
||||
if (man_id_1 != 0x00 || man_id_0 != 0x1f) {
|
||||
dev_err(&spi->dev, "Non-Atmel dev found (MAN_ID %02x %02x)\n",
|
||||
man_id_1, man_id_0);
|
||||
rc = -EINVAL;
|
||||
goto err_gpio_dir;
|
||||
}
|
||||
|
||||
rc = at86rf230_read_subreg(lp, SR_PART_NUM, &lp->part);
|
||||
if (rc)
|
||||
goto err_gpio_dir;
|
||||
|
||||
rc = at86rf230_read_subreg(lp, SR_VERSION_NUM, &lp->vers);
|
||||
if (rc)
|
||||
goto err_gpio_dir;
|
||||
|
||||
switch (lp->part) {
|
||||
case 2:
|
||||
chip = "at86rf230";
|
||||
/* supported = 1; FIXME: should be easy to support; */
|
||||
break;
|
||||
case 3:
|
||||
chip = "at86rf231";
|
||||
supported = 1;
|
||||
break;
|
||||
default:
|
||||
chip = "UNKNOWN";
|
||||
break;
|
||||
}
|
||||
|
||||
dev_info(&spi->dev, "Detected %s chip version %d\n", chip, lp->vers);
|
||||
if (!supported) {
|
||||
rc = -ENOTSUPP;
|
||||
goto err_gpio_dir;
|
||||
}
|
||||
|
||||
rc = at86rf230_hw_init(lp);
|
||||
if (rc)
|
||||
goto err_gpio_dir;
|
||||
|
||||
rc = request_irq(spi->irq, at86rf230_isr, IRQF_SHARED,
|
||||
dev_name(&spi->dev), lp);
|
||||
if (rc)
|
||||
goto err_gpio_dir;
|
||||
|
||||
rc = ieee802154_register_device(lp->dev);
|
||||
if (rc)
|
||||
goto err_irq;
|
||||
|
||||
return rc;
|
||||
|
||||
ieee802154_unregister_device(lp->dev);
|
||||
err_irq:
|
||||
free_irq(spi->irq, lp);
|
||||
flush_work(&lp->irqwork);
|
||||
err_gpio_dir:
|
||||
if (gpio_is_valid(lp->slp_tr))
|
||||
gpio_free(lp->slp_tr);
|
||||
err_slp_tr:
|
||||
gpio_free(lp->rstn);
|
||||
err_rstn:
|
||||
err_fill:
|
||||
spi_set_drvdata(spi, NULL);
|
||||
mutex_destroy(&lp->bmux);
|
||||
ieee802154_free_device(lp->dev);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int __devexit at86rf230_remove(struct spi_device *spi)
|
||||
{
|
||||
struct at86rf230_local *lp = spi_get_drvdata(spi);
|
||||
|
||||
ieee802154_unregister_device(lp->dev);
|
||||
|
||||
free_irq(spi->irq, lp);
|
||||
flush_work(&lp->irqwork);
|
||||
|
||||
if (gpio_is_valid(lp->slp_tr))
|
||||
gpio_free(lp->slp_tr);
|
||||
gpio_free(lp->rstn);
|
||||
|
||||
spi_set_drvdata(spi, NULL);
|
||||
mutex_destroy(&lp->bmux);
|
||||
ieee802154_free_device(lp->dev);
|
||||
|
||||
dev_dbg(&spi->dev, "unregistered at86rf230\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct spi_driver at86rf230_driver = {
|
||||
.driver = {
|
||||
.name = "at86rf230",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = at86rf230_probe,
|
||||
.remove = __devexit_p(at86rf230_remove),
|
||||
.suspend = at86rf230_suspend,
|
||||
.resume = at86rf230_resume,
|
||||
};
|
||||
|
||||
static int __init at86rf230_init(void)
|
||||
{
|
||||
return spi_register_driver(&at86rf230_driver);
|
||||
}
|
||||
module_init(at86rf230_init);
|
||||
|
||||
static void __exit at86rf230_exit(void)
|
||||
{
|
||||
spi_unregister_driver(&at86rf230_driver);
|
||||
}
|
||||
module_exit(at86rf230_exit);
|
||||
|
||||
MODULE_DESCRIPTION("AT86RF230 Transceiver Driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
31
include/linux/spi/at86rf230.h
Normal file
31
include/linux/spi/at86rf230.h
Normal file
|
|
@ -0,0 +1,31 @@
|
|||
/*
|
||||
* AT86RF230/RF231 driver
|
||||
*
|
||||
* Copyright (C) 2009-2012 Siemens AG
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2
|
||||
* as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along
|
||||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
||||
*
|
||||
* Written by:
|
||||
* Dmitry Eremin-Solenikov <dmitry.baryshkov@siemens.com>
|
||||
*/
|
||||
#ifndef AT86RF230_H
|
||||
#define AT86RF230_H
|
||||
|
||||
struct at86rf230_platform_data {
|
||||
int rstn;
|
||||
int slp_tr;
|
||||
int dig2;
|
||||
};
|
||||
|
||||
#endif
|
||||
Loading…
Add table
Add a link
Reference in a new issue