diff options
Diffstat (limited to 'drivers/net/ieee802154')
| -rw-r--r-- | drivers/net/ieee802154/Kconfig | 47 | ||||
| -rw-r--r-- | drivers/net/ieee802154/Makefile | 4 | ||||
| -rw-r--r-- | drivers/net/ieee802154/at86rf230.c | 958 | ||||
| -rw-r--r-- | drivers/net/ieee802154/fakehard.c | 448 | ||||
| -rw-r--r-- | drivers/net/ieee802154/fakelb.c | 294 | ||||
| -rw-r--r-- | drivers/net/ieee802154/mrf24j40.c | 767 |
6 files changed, 2518 insertions, 0 deletions
diff --git a/drivers/net/ieee802154/Kconfig b/drivers/net/ieee802154/Kconfig new file mode 100644 index 000000000000..08ae4655423a --- /dev/null +++ b/drivers/net/ieee802154/Kconfig @@ -0,0 +1,47 @@ +menuconfig IEEE802154_DRIVERS + tristate "IEEE 802.15.4 drivers" + depends on NETDEVICES && IEEE802154 + default y + ---help--- + Say Y here to get to see options for IEEE 802.15.4 Low-Rate + Wireless Personal Area Network device drivers. This option alone + does not add any kernel code. + + If you say N, all options in this submenu will be skipped and + disabled. + +config IEEE802154_FAKEHARD + tristate "Fake LR-WPAN driver with several interconnected devices" + depends on IEEE802154_DRIVERS + ---help--- + Say Y here to enable the fake driver that serves as an example + of HardMAC device driver. + + This driver can also be built as a module. To do so say M here. + The module will be called 'fakehard'. + +config IEEE802154_FAKELB + depends on IEEE802154_DRIVERS && MAC802154 + tristate "IEEE 802.15.4 loopback driver" + ---help--- + Say Y here to enable the fake driver that can emulate a net + of several interconnected radio devices. + + This driver can also be built as a module. To do so say M here. + The module will be called 'fakelb'. + +config IEEE802154_AT86RF230 + depends on IEEE802154_DRIVERS && MAC802154 + tristate "AT86RF230/231 transceiver driver" + depends on SPI + +config IEEE802154_MRF24J40 + tristate "Microchip MRF24J40 transceiver driver" + depends on IEEE802154_DRIVERS && MAC802154 + depends on SPI + ---help--- + Say Y here to enable the MRF24J20 SPI 802.15.4 wireless + controller. + + This driver can also be built as a module. To do so, say M here. + the module will be called 'mrf24j40'. diff --git a/drivers/net/ieee802154/Makefile b/drivers/net/ieee802154/Makefile new file mode 100644 index 000000000000..abb0c08decb0 --- /dev/null +++ b/drivers/net/ieee802154/Makefile @@ -0,0 +1,4 @@ +obj-$(CONFIG_IEEE802154_FAKEHARD) += fakehard.o +obj-$(CONFIG_IEEE802154_FAKELB) += fakelb.o +obj-$(CONFIG_IEEE802154_AT86RF230) += at86rf230.o +obj-$(CONFIG_IEEE802154_MRF24J40) += mrf24j40.o diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c new file mode 100644 index 000000000000..ba753d87a32f --- /dev/null +++ b/drivers/net/ieee802154/at86rf230.c @@ -0,0 +1,958 @@ +/* + * 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 <dbaryshkov@gmail.com> + * Alexander Smirnov <alex.bluesman.smirnov@gmail.com> + */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/gpio.h> +#include <linux/delay.h> +#include <linux/mutex.h> +#include <linux/workqueue.h> +#include <linux/spinlock.h> +#include <linux/spi/spi.h> +#include <linux/spi/at86rf230.h> +#include <linux/skbuff.h> + +#include <net/mac802154.h> +#include <net/wpan-phy.h> + +struct at86rf230_local { + struct spi_device *spi; + int rstn, slp_tr, dig2; + + u8 part; + u8 vers; + + u8 buf[2]; + struct mutex bmux; + + struct work_struct irqwork; + struct completion tx_complete; + + struct ieee802154_dev *dev; + + spinlock_t lock; + bool irq_disabled; + bool is_tx; +}; + +#define RG_TRX_STATUS (0x01) +#define SR_TRX_STATUS 0x01, 0x1f, 0 +#define SR_RESERVED_01_3 0x01, 0x20, 5 +#define SR_CCA_STATUS 0x01, 0x40, 6 +#define SR_CCA_DONE 0x01, 0x80, 7 +#define RG_TRX_STATE (0x02) +#define SR_TRX_CMD 0x02, 0x1f, 0 +#define SR_TRAC_STATUS 0x02, 0xe0, 5 +#define RG_TRX_CTRL_0 (0x03) +#define SR_CLKM_CTRL 0x03, 0x07, 0 +#define SR_CLKM_SHA_SEL 0x03, 0x08, 3 +#define SR_PAD_IO_CLKM 0x03, 0x30, 4 +#define SR_PAD_IO 0x03, 0xc0, 6 +#define RG_TRX_CTRL_1 (0x04) +#define SR_IRQ_POLARITY 0x04, 0x01, 0 +#define SR_IRQ_MASK_MODE 0x04, 0x02, 1 +#define SR_SPI_CMD_MODE 0x04, 0x0c, 2 +#define SR_RX_BL_CTRL 0x04, 0x10, 4 +#define SR_TX_AUTO_CRC_ON 0x04, 0x20, 5 +#define SR_IRQ_2_EXT_EN 0x04, 0x40, 6 +#define SR_PA_EXT_EN 0x04, 0x80, 7 +#define RG_PHY_TX_PWR (0x05) +#define SR_TX_PWR 0x05, 0x0f, 0 +#define SR_PA_LT 0x05, 0x30, 4 +#define SR_PA_BUF_LT 0x05, 0xc0, 6 +#define RG_PHY_RSSI (0x06) +#define SR_RSSI 0x06, 0x1f, 0 +#define SR_RND_VALUE 0x06, 0x60, 5 +#define SR_RX_CRC_VALID 0x06, 0x80, 7 +#define RG_PHY_ED_LEVEL (0x07) +#define SR_ED_LEVEL 0x07, 0xff, 0 +#define RG_PHY_CC_CCA (0x08) +#define SR_CHANNEL 0x08, 0x1f, 0 +#define SR_CCA_MODE 0x08, 0x60, 5 +#define SR_CCA_REQUEST 0x08, 0x80, 7 +#define RG_CCA_THRES (0x09) +#define SR_CCA_ED_THRES 0x09, 0x0f, 0 +#define SR_RESERVED_09_1 0x09, 0xf0, 4 +#define RG_RX_CTRL (0x0a) +#define SR_PDT_THRES 0x0a, 0x0f, 0 +#define SR_RESERVED_0a_1 0x0a, 0xf0, 4 +#define RG_SFD_VALUE (0x0b) +#define SR_SFD_VALUE 0x0b, 0xff, 0 +#define RG_TRX_CTRL_2 (0x0c) +#define SR_OQPSK_DATA_RATE 0x0c, 0x03, 0 +#define SR_RESERVED_0c_2 0x0c, 0x7c, 2 +#define SR_RX_SAFE_MODE 0x0c, 0x80, 7 +#define RG_ANT_DIV (0x0d) +#define SR_ANT_CTRL 0x0d, 0x03, 0 +#define SR_ANT_EXT_SW_EN 0x0d, 0x04, 2 +#define SR_ANT_DIV_EN 0x0d, 0x08, 3 +#define SR_RESERVED_0d_2 0x0d, 0x70, 4 +#define SR_ANT_SEL 0x0d, 0x80, 7 +#define RG_IRQ_MASK (0x0e) +#define SR_IRQ_MASK 0x0e, 0xff, 0 +#define RG_IRQ_STATUS (0x0f) +#define SR_IRQ_0_PLL_LOCK 0x0f, 0x01, 0 +#define SR_IRQ_1_PLL_UNLOCK 0x0f, 0x02, 1 +#define SR_IRQ_2_RX_START 0x0f, 0x04, 2 +#define SR_IRQ_3_TRX_END 0x0f, 0x08, 3 +#define SR_IRQ_4_CCA_ED_DONE 0x0f, 0x10, 4 +#define SR_IRQ_5_AMI 0x0f, 0x20, 5 +#define SR_IRQ_6_TRX_UR 0x0f, 0x40, 6 +#define SR_IRQ_7_BAT_LOW 0x0f, 0x80, 7 +#define RG_VREG_CTRL (0x10) +#define SR_RESERVED_10_6 0x10, 0x03, 0 +#define SR_DVDD_OK 0x10, 0x04, 2 +#define SR_DVREG_EXT 0x10, 0x08, 3 +#define SR_RESERVED_10_3 0x10, 0x30, 4 +#define SR_AVDD_OK 0x10, 0x40, 6 +#define SR_AVREG_EXT 0x10, 0x80, 7 +#define RG_BATMON (0x11) +#define SR_BATMON_VTH 0x11, 0x0f, 0 +#define SR_BATMON_HR 0x11, 0x10, 4 +#define SR_BATMON_OK 0x11, 0x20, 5 +#define SR_RESERVED_11_1 0x11, 0xc0, 6 +#define RG_XOSC_CTRL (0x12) +#define SR_XTAL_TRIM 0x12, 0x0f, 0 +#define SR_XTAL_MODE 0x12, 0xf0, 4 +#define RG_RX_SYN (0x15) +#define SR_RX_PDT_LEVEL 0x15, 0x0f, 0 +#define SR_RESERVED_15_2 0x15, 0x70, 4 +#define SR_RX_PDT_DIS 0x15, 0x80, 7 +#define RG_XAH_CTRL_1 (0x17) +#define SR_RESERVED_17_8 0x17, 0x01, 0 +#define SR_AACK_PROM_MODE 0x17, 0x02, 1 +#define SR_AACK_ACK_TIME 0x17, 0x04, 2 +#define SR_RESERVED_17_5 0x17, 0x08, 3 +#define SR_AACK_UPLD_RES_FT 0x17, 0x10, 4 +#define SR_AACK_FLTR_RES_FT 0x17, 0x20, 5 +#define SR_RESERVED_17_2 0x17, 0x40, 6 +#define SR_RESERVED_17_1 0x17, 0x80, 7 +#define RG_FTN_CTRL (0x18) +#define SR_RESERVED_18_2 0x18, 0x7f, 0 +#define SR_FTN_START 0x18, 0x80, 7 +#define RG_PLL_CF (0x1a) +#define SR_RESERVED_1a_2 0x1a, 0x7f, 0 +#define SR_PLL_CF_START 0x1a, 0x80, 7 +#define RG_PLL_DCU (0x1b) +#define SR_RESERVED_1b_3 0x1b, 0x3f, 0 +#define SR_RESERVED_1b_2 0x1b, 0x40, 6 +#define SR_PLL_DCU_START 0x1b, 0x80, 7 +#define RG_PART_NUM (0x1c) +#define SR_PART_NUM 0x1c, 0xff, 0 +#define RG_VERSION_NUM (0x1d) +#define SR_VERSION_NUM 0x1d, 0xff, 0 +#define RG_MAN_ID_0 (0x1e) +#define SR_MAN_ID_0 0x1e, 0xff, 0 +#define RG_MAN_ID_1 (0x1f) +#define SR_MAN_ID_1 0x1f, 0xff, 0 +#define RG_SHORT_ADDR_0 (0x20) +#define SR_SHORT_ADDR_0 0x20, 0xff, 0 +#define RG_SHORT_ADDR_1 (0x21) +#define SR_SHORT_ADDR_1 0x21, 0xff, 0 +#define RG_PAN_ID_0 (0x22) +#define SR_PAN_ID_0 0x22, 0xff, 0 +#define RG_PAN_ID_1 (0x23) +#define SR_PAN_ID_1 0x23, 0xff, 0 +#define RG_IEEE_ADDR_0 (0x24) +#define SR_IEEE_ADDR_0 0x24, 0xff, 0 +#define RG_IEEE_ADDR_1 (0x25) +#define SR_IEEE_ADDR_1 0x25, 0xff, 0 +#define RG_IEEE_ADDR_2 (0x26) +#define SR_IEEE_ADDR_2 0x26, 0xff, 0 +#define RG_IEEE_ADDR_3 (0x27) +#define SR_IEEE_ADDR_3 0x27, 0xff, 0 +#define RG_IEEE_ADDR_4 (0x28) +#define SR_IEEE_ADDR_4 0x28, 0xff, 0 +#define RG_IEEE_ADDR_5 (0x29) +#define SR_IEEE_ADDR_5 0x29, 0xff, 0 +#define RG_IEEE_ADDR_6 (0x2a) +#define SR_IEEE_ADDR_6 0x2a, 0xff, 0 +#define RG_IEEE_ADDR_7 (0x2b) +#define SR_IEEE_ADDR_7 0x2b, 0xff, 0 +#define RG_XAH_CTRL_0 (0x2c) +#define SR_SLOTTED_OPERATION 0x2c, 0x01, 0 +#define SR_MAX_CSMA_RETRIES 0x2c, 0x0e, 1 +#define SR_MAX_FRAME_RETRIES 0x2c, 0xf0, 4 +#define RG_CSMA_SEED_0 (0x2d) +#define SR_CSMA_SEED_0 0x2d, 0xff, 0 +#define RG_CSMA_SEED_1 (0x2e) +#define SR_CSMA_SEED_1 0x2e, 0x07, 0 +#define SR_AACK_I_AM_COORD 0x2e, 0x08, 3 +#define SR_AACK_DIS_ACK 0x2e, 0x10, 4 +#define SR_AACK_SET_PD 0x2e, 0x20, 5 +#define SR_AACK_FVN_MODE 0x2e, 0xc0, 6 +#define RG_CSMA_BE (0x2f) +#define SR_MIN_BE 0x2f, 0x0f, 0 +#define SR_MAX_BE 0x2f, 0xf0, 4 + +#define CMD_REG 0x80 +#define CMD_REG_MASK 0x3f +#define CMD_WRITE 0x40 +#define CMD_FB 0x20 + +#define IRQ_BAT_LOW (1 << 7) +#define IRQ_TRX_UR (1 << 6) +#define IRQ_AMI (1 << 5) +#define IRQ_CCA_ED (1 << 4) +#define IRQ_TRX_END (1 << 3) +#define IRQ_RX_START (1 << 2) +#define IRQ_PLL_UNL (1 << 1) +#define IRQ_PLL_LOCK (1 << 0) + +#define STATE_P_ON 0x00 /* BUSY */ +#define STATE_BUSY_RX 0x01 +#define STATE_BUSY_TX 0x02 +#define STATE_FORCE_TRX_OFF 0x03 +#define STATE_FORCE_TX_ON 0x04 /* IDLE */ +/* 0x05 */ /* INVALID_PARAMETER */ +#define STATE_RX_ON 0x06 +/* 0x07 */ /* SUCCESS */ +#define STATE_TRX_OFF 0x08 +#define STATE_TX_ON 0x09 +/* 0x0a - 0x0e */ /* 0x0a - UNSUPPORTED_ATTRIBUTE */ +#define STATE_SLEEP 0x0F +#define STATE_BUSY_RX_AACK 0x11 +#define STATE_BUSY_TX_ARET 0x12 +#define STATE_BUSY_RX_AACK_ON 0x16 +#define STATE_BUSY_TX_ARET_ON 0x19 +#define STATE_RX_ON_NOCLK 0x1C +#define STATE_RX_AACK_ON_NOCLK 0x1D +#define STATE_BUSY_RX_AACK_NOCLK 0x1E +#define STATE_TRANSITION_IN_PROGRESS 0x1F + +static int +__at86rf230_write(struct at86rf230_local *lp, u8 addr, u8 data) +{ + u8 *buf = lp->buf; + int status; + struct spi_message msg; + struct spi_transfer xfer = { + .len = 2, + .tx_buf = buf, + }; + + buf[0] = (addr & CMD_REG_MASK) | CMD_REG | CMD_WRITE; + buf[1] = data; + 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, &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]); + + return status; +} + +static int +__at86rf230_read_subreg(struct at86rf230_local *lp, + u8 addr, u8 mask, int shift, u8 *data) +{ + u8 *buf = lp->buf; + int status; + struct spi_message msg; + struct spi_transfer xfer = { + .len = 2, + .tx_buf = buf, + .rx_buf = buf, + }; + + buf[0] = (addr & CMD_REG_MASK) | CMD_REG; + buf[1] = 0xff; + dev_vdbg(&lp->spi->dev, "buf[0] = %02x\n", buf[0]); + spi_message_init(&msg); + spi_message_add_tail(&xfer, &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]); + + if (status == 0) + *data = buf[1]; + + return status; +} + +static int +at86rf230_read_subreg(struct at86rf230_local *lp, + u8 addr, u8 mask, int shift, u8 *data) +{ + int status; + + mutex_lock(&lp->bmux); + status = __at86rf230_read_subreg(lp, addr, mask, shift, data); + mutex_unlock(&lp->bmux); + + return status; +} + +static int +at86rf230_write_subreg(struct at86rf230_local *lp, + u8 addr, u8 mask, int shift, u8 data) +{ + int status; + u8 val; + + mutex_lock(&lp->bmux); + status = __at86rf230_read_subreg(lp, addr, 0xff, 0, &val); + if (status) + goto out; + + val &= ~mask; + val |= (data << shift) & mask; + + status = __at86rf230_write(lp, addr, val); +out: + mutex_unlock(&lp->bmux); + + return status; +} + +static int +at86rf230_write_fbuf(struct at86rf230_local *lp, u8 *data, u8 len) +{ + u8 *buf = lp->buf; + int status; + struct spi_message msg; + struct spi_transfer xfer_head = { + .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; + + spin_lock(&lp->lock); + if (lp->irq_disabled) { + spin_unlock(&lp->lock); + return -EBUSY; + } + spin_unlock(&lp->lock); + + 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; + struct sk_buff *skb; + + skb = alloc_skb(len, GFP_KERNEL); + + if (!skb) + return -ENOMEM; + + if (at86rf230_read_fbuf(lp, skb_put(skb, len), &len, &lqi)) + 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 %x\n", 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; + + 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) { + spin_lock_irqsave(&lp->lock, flags); + status &= ~IRQ_TRX_END; + if (lp->is_tx) { + lp->is_tx = 0; + spin_unlock_irqrestore(&lp->lock, flags); + complete(&lp->tx_complete); + } else { + spin_unlock_irqrestore(&lp->lock, flags); + at86rf230_rx(lp); + } + } + + spin_lock_irqsave(&lp->lock, flags); + lp->irq_disabled = 0; + spin_unlock_irqrestore(&lp->lock, flags); + + enable_irq(lp->spi->irq); +} + +static irqreturn_t at86rf230_isr(int irq, void *data) +{ + struct at86rf230_local *lp = data; + + disable_irq_nosync(irq); + + spin_lock(&lp->lock); + 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, +}; + +module_spi_driver(at86rf230_driver); + +MODULE_DESCRIPTION("AT86RF230 Transceiver Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/net/ieee802154/fakehard.c b/drivers/net/ieee802154/fakehard.c new file mode 100644 index 000000000000..7d39add7d467 --- /dev/null +++ b/drivers/net/ieee802154/fakehard.c @@ -0,0 +1,448 @@ +/* + * Sample driver for HardMAC IEEE 802.15.4 devices + * + * Copyright (C) 2009 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> + */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/netdevice.h> +#include <linux/skbuff.h> +#include <linux/if_arp.h> + +#include <net/af_ieee802154.h> +#include <net/ieee802154_netdev.h> +#include <net/ieee802154.h> +#include <net/nl802154.h> +#include <net/wpan-phy.h> + +struct fakehard_priv { + struct wpan_phy *phy; +}; + +static struct wpan_phy *fake_to_phy(const struct net_device *dev) +{ + struct fakehard_priv *priv = netdev_priv(dev); + return priv->phy; +} + +/** + * fake_get_phy - Return a phy corresponding to this device. + * @dev: The network device for which to return the wan-phy object + * + * This function returns a wpan-phy object corresponding to the passed + * network device. Reference counter for wpan-phy object is incremented, + * so when the wpan-phy isn't necessary, you should drop the reference + * via @wpan_phy_put() call. + */ +static struct wpan_phy *fake_get_phy(const struct net_device *dev) +{ + struct wpan_phy *phy = fake_to_phy(dev); + return to_phy(get_device(&phy->dev)); +} + +/** + * fake_get_pan_id - Retrieve the PAN ID of the device. + * @dev: The network device to retrieve the PAN of. + * + * Return the ID of the PAN from the PIB. + */ +static u16 fake_get_pan_id(const struct net_device *dev) +{ + BUG_ON(dev->type != ARPHRD_IEEE802154); + + return 0xeba1; +} + +/** + * fake_get_short_addr - Retrieve the short address of the device. + * @dev: The network device to retrieve the short address of. + * + * Returns the IEEE 802.15.4 short-form address cached for this + * device. If the device has not yet had a short address assigned + * then this should return 0xFFFF to indicate a lack of association. + */ +static u16 fake_get_short_addr(const struct net_device *dev) +{ + BUG_ON(dev->type != ARPHRD_IEEE802154); + + return 0x1; +} + +/** + * fake_get_dsn - Retrieve the DSN of the device. + * @dev: The network device to retrieve the DSN for. + * + * Returns the IEEE 802.15.4 DSN for the network device. + * The DSN is the sequence number which will be added to each + * packet or MAC command frame by the MAC during transmission. + * + * DSN means 'Data Sequence Number'. + * + * Note: This is in section 7.2.1.2 of the IEEE 802.15.4-2006 + * document. + */ +static u8 fake_get_dsn(const struct net_device *dev) +{ + BUG_ON(dev->type != ARPHRD_IEEE802154); + + return 0x00; /* DSN are implemented in HW, so return just 0 */ +} + +/** + * fake_get_bsn - Retrieve the BSN of the device. + * @dev: The network device to retrieve the BSN for. + * + * Returns the IEEE 802.15.4 BSN for the network device. + * The BSN is the sequence number which will be added to each + * beacon frame sent by the MAC. + * + * BSN means 'Beacon Sequence Number'. + * + * Note: This is in section 7.2.1.2 of the IEEE 802.15.4-2006 + * document. + */ +static u8 fake_get_bsn(const struct net_device *dev) +{ + BUG_ON(dev->type != ARPHRD_IEEE802154); + + return 0x00; /* BSN are implemented in HW, so return just 0 */ +} + +/** + * fake_assoc_req - Make an association request to the HW. + * @dev: The network device which we are associating to a network. + * @addr: The coordinator with which we wish to associate. + * @channel: The channel on which to associate. + * @cap: The capability information field to use in the association. + * + * Start an association with a coordinator. The coordinator's address + * and PAN ID can be found in @addr. + * + * Note: This is in section 7.3.1 and 7.5.3.1 of the IEEE + * 802.15.4-2006 document. + */ +static int fake_assoc_req(struct net_device *dev, + struct ieee802154_addr *addr, u8 channel, u8 page, u8 cap) +{ + struct wpan_phy *phy = fake_to_phy(dev); + + mutex_lock(&phy->pib_lock); + phy->current_channel = channel; + phy->current_page = page; + mutex_unlock(&phy->pib_lock); + + /* We simply emulate it here */ + return ieee802154_nl_assoc_confirm(dev, fake_get_short_addr(dev), + IEEE802154_SUCCESS); +} + +/** + * fake_assoc_resp - Send an association response to a device. + * @dev: The network device on which to send the response. + * @addr: The address of the device to respond to. + * @short_addr: The assigned short address for the device (if any). + * @status: The result of the association request. + * + * Queue the association response of the coordinator to another + * device's attempt to associate with the network which we + * coordinate. This is then added to the indirect-send queue to be + * transmitted to the end device when it polls for data. + * + * Note: This is in section 7.3.2 and 7.5.3.1 of the IEEE + * 802.15.4-2006 document. + */ +static int fake_assoc_resp(struct net_device *dev, + struct ieee802154_addr *addr, u16 short_addr, u8 status) +{ + return 0; +} + +/** + * fake_disassoc_req - Disassociate a device from a network. + * @dev: The network device on which we're disassociating a device. + * @addr: The device to disassociate from the network. + * @reason: The reason to give to the device for being disassociated. + * + * This sends a disassociation notification to the device being + * disassociated from the network. + * + * Note: This is in section 7.5.3.2 of the IEEE 802.15.4-2006 + * document, with the reason described in 7.3.3.2. + */ +static int fake_disassoc_req(struct net_device *dev, + struct ieee802154_addr *addr, u8 reason) +{ + return ieee802154_nl_disassoc_confirm(dev, IEEE802154_SUCCESS); +} + +/** + * fake_start_req - Start an IEEE 802.15.4 PAN. + * @dev: The network device on which to start the PAN. + * @addr: The coordinator address to use when starting the PAN. + * @channel: The channel on which to start the PAN. + * @bcn_ord: Beacon order. + * @sf_ord: Superframe order. + * @pan_coord: Whether or not we are the PAN coordinator or just + * requesting a realignment perhaps? + * @blx: Battery Life Extension feature bitfield. + * @coord_realign: Something to realign something else. + * + * If pan_coord is non-zero then this starts a network with the + * provided parameters, otherwise it attempts a coordinator + * realignment of the stated network instead. + * + * Note: This is in section 7.5.2.3 of the IEEE 802.15.4-2006 + * document, with 7.3.8 describing coordinator realignment. + */ +static int fake_start_req(struct net_device *dev, struct ieee802154_addr *addr, + u8 channel, u8 page, + u8 bcn_ord, u8 sf_ord, u8 pan_coord, u8 blx, + u8 coord_realign) +{ + struct wpan_phy *phy = fake_to_phy(dev); + + mutex_lock(&phy->pib_lock); + phy->current_channel = channel; + phy->current_page = page; + mutex_unlock(&phy->pib_lock); + + /* We don't emulate beacons here at all, so START should fail */ + ieee802154_nl_start_confirm(dev, IEEE802154_INVALID_PARAMETER); + return 0; +} + +/** + * fake_scan_req - Start a channel scan. + * @dev: The network device on which to perform a channel scan. + * @type: The type of scan to perform. + * @channels: The channel bitmask to scan. + * @duration: How long to spend on each channel. + * + * This starts either a passive (energy) scan or an active (PAN) scan + * on the channels indicated in the @channels bitmask. The duration of + * the scan is measured in terms of superframe duration. Specifically, + * the scan will spend aBaseSuperFrameDuration * ((2^n) + 1) on each + * channel. + * + * Note: This is in section 7.5.2.1 of the IEEE 802.15.4-2006 document. + */ +static int fake_scan_req(struct net_device *dev, u8 type, u32 channels, + u8 page, u8 duration) +{ + u8 edl[27] = {}; + return ieee802154_nl_scan_confirm(dev, IEEE802154_SUCCESS, type, + channels, page, + type == IEEE802154_MAC_SCAN_ED ? edl : NULL); +} + +static struct ieee802154_mlme_ops fake_mlme = { + .assoc_req = fake_assoc_req, + .assoc_resp = fake_assoc_resp, + .disassoc_req = fake_disassoc_req, + .start_req = fake_start_req, + .scan_req = fake_scan_req, + + .get_phy = fake_get_phy, + + .get_pan_id = fake_get_pan_id, + .get_short_addr = fake_get_short_addr, + .get_dsn = fake_get_dsn, + .get_bsn = fake_get_bsn, +}; + +static int ieee802154_fake_open(struct net_device *dev) +{ + netif_start_queue(dev); + return 0; +} + +static int ieee802154_fake_close(struct net_device *dev) +{ + netif_stop_queue(dev); + return 0; +} + +static netdev_tx_t ieee802154_fake_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + dev->stats.tx_packets++; + dev->stats.tx_bytes += skb->len; + + /* FIXME: do hardware work here ... */ + + dev_kfree_skb(skb); + return NETDEV_TX_OK; +} + + +static int ieee802154_fake_ioctl(struct net_device *dev, struct ifreq *ifr, + int cmd) +{ + struct sockaddr_ieee802154 *sa = + (struct sockaddr_ieee802154 *)&ifr->ifr_addr; + u16 pan_id, short_addr; + + switch (cmd) { + case SIOCGIFADDR: + /* FIXME: fixed here, get from device IRL */ + pan_id = fake_get_pan_id(dev); + short_addr = fake_get_short_addr(dev); + if (pan_id == IEEE802154_PANID_BROADCAST || + short_addr == IEEE802154_ADDR_BROADCAST) + return -EADDRNOTAVAIL; + + sa->family = AF_IEEE802154; + sa->addr.addr_type = IEEE802154_ADDR_SHORT; + sa->addr.pan_id = pan_id; + sa->addr.short_addr = short_addr; + return 0; + } + return -ENOIOCTLCMD; +} + +static int ieee802154_fake_mac_addr(struct net_device *dev, void *p) +{ + return -EBUSY; /* HW address is built into the device */ +} + +static const struct net_device_ops fake_ops = { + .ndo_open = ieee802154_fake_open, + .ndo_stop = ieee802154_fake_close, + .ndo_start_xmit = ieee802154_fake_xmit, + .ndo_do_ioctl = ieee802154_fake_ioctl, + .ndo_set_mac_address = ieee802154_fake_mac_addr, +}; + +static void ieee802154_fake_destruct(struct net_device *dev) +{ + struct wpan_phy *phy = fake_to_phy(dev); + + wpan_phy_unregister(phy); + free_netdev(dev); + wpan_phy_free(phy); +} + +static void ieee802154_fake_setup(struct net_device *dev) +{ + dev->addr_len = IEEE802154_ADDR_LEN; + memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN); + dev->features = NETIF_F_HW_CSUM; + dev->needed_tailroom = 2; /* FCS */ + dev->mtu = 127; + dev->tx_queue_len = 10; + dev->type = ARPHRD_IEEE802154; + dev->flags = IFF_NOARP | IFF_BROADCAST; + dev->watchdog_timeo = 0; + dev->destructor = ieee802154_fake_destruct; +} + + +static int __devinit ieee802154fake_probe(struct platform_device *pdev) +{ + struct net_device *dev; + struct fakehard_priv *priv; + struct wpan_phy *phy = wpan_phy_alloc(0); + int err; + + if (!phy) + return -ENOMEM; + + dev = alloc_netdev(sizeof(struct fakehard_priv), "hardwpan%d", ieee802154_fake_setup); + if (!dev) { + wpan_phy_free(phy); + return -ENOMEM; + } + + memcpy(dev->dev_addr, "\xba\xbe\xca\xfe\xde\xad\xbe\xef", + dev->addr_len); + memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len); + + /* + * For now we'd like to emulate 2.4 GHz-only device, + * both O-QPSK and CSS + */ + /* 2.4 GHz O-QPSK 802.15.4-2003 */ + phy->channels_supported[0] |= 0x7FFF800; + /* 2.4 GHz CSS 802.15.4a-2007 */ + phy->channels_supported[3] |= 0x3fff; + + phy->transmit_power = 0xbf; + + dev->netdev_ops = &fake_ops; + dev->ml_priv = &fake_mlme; + + priv = netdev_priv(dev); + priv->phy = phy; + + wpan_phy_set_dev(phy, &pdev->dev); + SET_NETDEV_DEV(dev, &phy->dev); + + platform_set_drvdata(pdev, dev); + + err = wpan_phy_register(phy); + if (err) + goto out; + + err = register_netdev(dev); + if (err < 0) + goto out; + + dev_info(&pdev->dev, "Added ieee802154 HardMAC hardware\n"); + return 0; + +out: + unregister_netdev(dev); + return err; +} + +static int __devexit ieee802154fake_remove(struct platform_device *pdev) +{ + struct net_device *dev = platform_get_drvdata(pdev); + unregister_netdev(dev); + return 0; +} + +static struct platform_device *ieee802154fake_dev; + +static struct platform_driver ieee802154fake_driver = { + .probe = ieee802154fake_probe, + .remove = __devexit_p(ieee802154fake_remove), + .driver = { + .name = "ieee802154hardmac", + .owner = THIS_MODULE, + }, +}; + +static __init int fake_init(void) +{ + ieee802154fake_dev = platform_device_register_simple( + "ieee802154hardmac", -1, NULL, 0); + return platform_driver_register(&ieee802154fake_driver); +} + +static __exit void fake_exit(void) +{ + platform_driver_unregister(&ieee802154fake_driver); + platform_device_unregister(ieee802154fake_dev); +} + +module_init(fake_init); +module_exit(fake_exit); +MODULE_LICENSE("GPL"); diff --git a/drivers/net/ieee802154/fakelb.c b/drivers/net/ieee802154/fakelb.c new file mode 100644 index 000000000000..e7456fcd0913 --- /dev/null +++ b/drivers/net/ieee802154/fakelb.c @@ -0,0 +1,294 @@ +/* + * Loopback IEEE 802.15.4 interface + * + * Copyright 2007-2012 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: + * Sergey Lapin <slapin@ossfans.org> + * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> + * Alexander Smirnov <alex.bluesman.smirnov@gmail.com> + */ + +#include <linux/module.h> +#include <linux/timer.h> +#include <linux/platform_device.h> +#include <linux/netdevice.h> +#include <linux/spinlock.h> +#include <net/mac802154.h> +#include <net/wpan-phy.h> + +static int numlbs = 1; + +struct fakelb_dev_priv { + struct ieee802154_dev *dev; + + struct list_head list; + struct fakelb_priv *fake; + + spinlock_t lock; + bool working; +}; + +struct fakelb_priv { + struct list_head list; + rwlock_t lock; +}; + +static int +fakelb_hw_ed(struct ieee802154_dev *dev, u8 *level) +{ + might_sleep(); + BUG_ON(!level); + *level = 0xbe; + + return 0; +} + +static int +fakelb_hw_channel(struct ieee802154_dev *dev, int page, int channel) +{ + pr_debug("set channel to %d\n", channel); + + might_sleep(); + dev->phy->current_page = page; + dev->phy->current_channel = channel; + + return 0; +} + +static void +fakelb_hw_deliver(struct fakelb_dev_priv *priv, struct sk_buff *skb) +{ + struct sk_buff *newskb; + + spin_lock(&priv->lock); + if (priv->working) { + newskb = pskb_copy(skb, GFP_ATOMIC); + ieee802154_rx_irqsafe(priv->dev, newskb, 0xcc); + } + spin_unlock(&priv->lock); +} + +static int +fakelb_hw_xmit(struct ieee802154_dev *dev, struct sk_buff *skb) +{ + struct fakelb_dev_priv *priv = dev->priv; + struct fakelb_priv *fake = priv->fake; + + might_sleep(); + + read_lock_bh(&fake->lock); + if (priv->list.next == priv->list.prev) { + /* we are the only one device */ + fakelb_hw_deliver(priv, skb); + } else { + struct fakelb_dev_priv *dp; + list_for_each_entry(dp, &priv->fake->list, list) { + if (dp != priv && + (dp->dev->phy->current_channel == + priv->dev->phy->current_channel)) + fakelb_hw_deliver(dp, skb); + } + } + read_unlock_bh(&fake->lock); + + return 0; +} + +static int +fakelb_hw_start(struct ieee802154_dev *dev) { + struct fakelb_dev_priv *priv = dev->priv; + int ret = 0; + + spin_lock(&priv->lock); + if (priv->working) + ret = -EBUSY; + else + priv->working = 1; + spin_unlock(&priv->lock); + + return ret; +} + +static void +fakelb_hw_stop(struct ieee802154_dev *dev) { + struct fakelb_dev_priv *priv = dev->priv; + + spin_lock(&priv->lock); + priv->working = 0; + spin_unlock(&priv->lock); +} + +static struct ieee802154_ops fakelb_ops = { + .owner = THIS_MODULE, + .xmit = fakelb_hw_xmit, + .ed = fakelb_hw_ed, + .set_channel = fakelb_hw_channel, + .start = fakelb_hw_start, + .stop = fakelb_hw_stop, +}; + +/* Number of dummy devices to be set up by this module. */ +module_param(numlbs, int, 0); +MODULE_PARM_DESC(numlbs, " number of pseudo devices"); + +static int fakelb_add_one(struct device *dev, struct fakelb_priv *fake) +{ + struct fakelb_dev_priv *priv; + int err; + struct ieee802154_dev *ieee; + + ieee = ieee802154_alloc_device(sizeof(*priv), &fakelb_ops); + if (!ieee) + return -ENOMEM; + + priv = ieee->priv; + priv->dev = ieee; + + /* 868 MHz BPSK 802.15.4-2003 */ + ieee->phy->channels_supported[0] |= 1; + /* 915 MHz BPSK 802.15.4-2003 */ + ieee->phy->channels_supported[0] |= 0x7fe; + /* 2.4 GHz O-QPSK 802.15.4-2003 */ + ieee->phy->channels_supported[0] |= 0x7FFF800; + /* 868 MHz ASK 802.15.4-2006 */ + ieee->phy->channels_supported[1] |= 1; + /* 915 MHz ASK 802.15.4-2006 */ + ieee->phy->channels_supported[1] |= 0x7fe; + /* 868 MHz O-QPSK 802.15.4-2006 */ + ieee->phy->channels_supported[2] |= 1; + /* 915 MHz O-QPSK 802.15.4-2006 */ + ieee->phy->channels_supported[2] |= 0x7fe; + /* 2.4 GHz CSS 802.15.4a-2007 */ + ieee->phy->channels_supported[3] |= 0x3fff; + /* UWB Sub-gigahertz 802.15.4a-2007 */ + ieee->phy->channels_supported[4] |= 1; + /* UWB Low band 802.15.4a-2007 */ + ieee->phy->channels_supported[4] |= 0x1e; + /* UWB High band 802.15.4a-2007 */ + ieee->phy->channels_supported[4] |= 0xffe0; + /* 750 MHz O-QPSK 802.15.4c-2009 */ + ieee->phy->channels_supported[5] |= 0xf; + /* 750 MHz MPSK 802.15.4c-2009 */ + ieee->phy->channels_supported[5] |= 0xf0; + /* 950 MHz BPSK 802.15.4d-2009 */ + ieee->phy->channels_supported[6] |= 0x3ff; + /* 950 MHz GFSK 802.15.4d-2009 */ + ieee->phy->channels_supported[6] |= 0x3ffc00; + + INIT_LIST_HEAD(&priv->list); + priv->fake = fake; + + spin_lock_init(&priv->lock); + + ieee->parent = dev; + + err = ieee802154_register_device(ieee); + if (err) + goto err_reg; + + write_lock_bh(&fake->lock); + list_add_tail(&priv->list, &fake->list); + write_unlock_bh(&fake->lock); + + return 0; + +err_reg: + ieee802154_free_device(priv->dev); + return err; +} + +static void fakelb_del(struct fakelb_dev_priv *priv) +{ + write_lock_bh(&priv->fake->lock); + list_del(&priv->list); + write_unlock_bh(&priv->fake->lock); + + ieee802154_unregister_device(priv->dev); + ieee802154_free_device(priv->dev); +} + +static int __devinit fakelb_probe(struct platform_device *pdev) +{ + struct fakelb_priv *priv; + struct fakelb_dev_priv *dp; + int err = -ENOMEM; + int i; + + priv = kzalloc(sizeof(struct fakelb_priv), GFP_KERNEL); + if (!priv) + goto err_alloc; + + INIT_LIST_HEAD(&priv->list); + rwlock_init(&priv->lock); + + for (i = 0; i < numlbs; i++) { + err = fakelb_add_one(&pdev->dev, priv); + if (err < 0) + goto err_slave; + } + + platform_set_drvdata(pdev, priv); + dev_info(&pdev->dev, "added ieee802154 hardware\n"); + return 0; + +err_slave: + list_for_each_entry(dp, &priv->list, list) + fakelb_del(dp); + kfree(priv); +err_alloc: + return err; +} + +static int __devexit fakelb_remove(struct platform_device *pdev) +{ + struct fakelb_priv *priv = platform_get_drvdata(pdev); + struct fakelb_dev_priv *dp, *temp; + + list_for_each_entry_safe(dp, temp, &priv->list, list) + fakelb_del(dp); + kfree(priv); + + return 0; +} + +static struct platform_device *ieee802154fake_dev; + +static struct platform_driver ieee802154fake_driver = { + .probe = fakelb_probe, + .remove = __devexit_p(fakelb_remove), + .driver = { + .name = "ieee802154fakelb", + .owner = THIS_MODULE, + }, +}; + +static __init int fakelb_init_module(void) +{ + ieee802154fake_dev = platform_device_register_simple( + "ieee802154fakelb", -1, NULL, 0); + return platform_driver_register(&ieee802154fake_driver); +} + +static __exit void fake_remove_module(void) +{ + platform_driver_unregister(&ieee802154fake_driver); + platform_device_unregister(ieee802154fake_dev); +} + +module_init(fakelb_init_module); +module_exit(fake_remove_module); +MODULE_LICENSE("GPL"); diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c new file mode 100644 index 000000000000..ed7521693980 --- /dev/null +++ b/drivers/net/ieee802154/mrf24j40.c @@ -0,0 +1,767 @@ +/* + * Driver for Microchip MRF24J40 802.15.4 Wireless-PAN Networking controller + * + * Copyright (C) 2012 Alan Ott <alan@signal11.us> + * Signal 11 Software + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/spi/spi.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <net/wpan-phy.h> +#include <net/mac802154.h> + +/* MRF24J40 Short Address Registers */ +#define REG_RXMCR 0x00 /* Receive MAC control */ +#define REG_PANIDL 0x01 /* PAN ID (low) */ +#define REG_PANIDH 0x02 /* PAN ID (high) */ +#define REG_SADRL 0x03 /* Short address (low) */ +#define REG_SADRH 0x04 /* Short address (high) */ +#define REG_EADR0 0x05 /* Long address (low) (high is EADR7) */ +#define REG_TXMCR 0x11 /* Transmit MAC control */ +#define REG_PACON0 0x16 /* Power Amplifier Control */ +#define REG_PACON1 0x17 /* Power Amplifier Control */ +#define REG_PACON2 0x18 /* Power Amplifier Control */ +#define REG_TXNCON 0x1B /* Transmit Normal FIFO Control */ +#define REG_TXSTAT 0x24 /* TX MAC Status Register */ +#define REG_SOFTRST 0x2A /* Soft Reset */ +#define REG_TXSTBL 0x2E /* TX Stabilization */ +#define REG_INTSTAT 0x31 /* Interrupt Status */ +#define REG_INTCON 0x32 /* Interrupt Control */ +#define REG_RFCTL 0x36 /* RF Control Mode Register */ +#define REG_BBREG1 0x39 /* Baseband Registers */ +#define REG_BBREG2 0x3A /* */ +#define REG_BBREG6 0x3E /* */ +#define REG_CCAEDTH 0x3F /* Energy Detection Threshold */ + +/* MRF24J40 Long Address Registers */ +#define REG_RFCON0 0x200 /* RF Control Registers */ +#define REG_RFCON1 0x201 +#define REG_RFCON2 0x202 +#define REG_RFCON3 0x203 +#define REG_RFCON5 0x205 +#define REG_RFCON6 0x206 +#define REG_RFCON7 0x207 +#define REG_RFCON8 0x208 +#define REG_RSSI 0x210 +#define REG_SLPCON0 0x211 /* Sleep Clock Control Registers */ +#define REG_SLPCON1 0x220 +#define REG_WAKETIMEL 0x222 /* Wake-up Time Match Value Low */ +#define REG_WAKETIMEH 0x223 /* Wake-up Time Match Value High */ +#define REG_RX_FIFO 0x300 /* Receive FIFO */ + +/* Device configuration: Only channels 11-26 on page 0 are supported. */ +#define MRF24J40_CHAN_MIN 11 +#define MRF24J40_CHAN_MAX 26 +#define CHANNEL_MASK (((u32)1 << (MRF24J40_CHAN_MAX + 1)) \ + - ((u32)1 << MRF24J40_CHAN_MIN)) + +#define TX_FIFO_SIZE 128 /* From datasheet */ +#define RX_FIFO_SIZE 144 /* From datasheet */ +#define SET_CHANNEL_DELAY_US 192 /* From datasheet */ + +/* Device Private Data */ +struct mrf24j40 { + struct spi_device *spi; + struct ieee802154_dev *dev; + + struct mutex buffer_mutex; /* only used to protect buf */ + struct completion tx_complete; + struct work_struct irqwork; + u8 *buf; /* 3 bytes. Used for SPI single-register transfers. */ +}; + +/* Read/Write SPI Commands for Short and Long Address registers. */ +#define MRF24J40_READSHORT(reg) ((reg) << 1) +#define MRF24J40_WRITESHORT(reg) ((reg) << 1 | 1) +#define MRF24J40_READLONG(reg) (1 << 15 | (reg) << 5) +#define MRF24J40_WRITELONG(reg) (1 << 15 | (reg) << 5 | 1 << 4) + +/* Maximum speed to run the device at. TODO: Get the real max value from + * someone at Microchip since it isn't in the datasheet. */ +#define MAX_SPI_SPEED_HZ 1000000 + +#define printdev(X) (&X->spi->dev) + +static int write_short_reg(struct mrf24j40 *devrec, u8 reg, u8 value) +{ + int ret; + struct spi_message msg; + struct spi_transfer xfer = { + .len = 2, + .tx_buf = devrec->buf, + .rx_buf = devrec->buf, + }; + + spi_message_init(&msg); + spi_message_add_tail(&xfer, &msg); + + mutex_lock(&devrec->buffer_mutex); + devrec->buf[0] = MRF24J40_WRITESHORT(reg); + devrec->buf[1] = value; + + ret = spi_sync(devrec->spi, &msg); + if (ret) + dev_err(printdev(devrec), + "SPI write Failed for short register 0x%hhx\n", reg); + + mutex_unlock(&devrec->buffer_mutex); + return ret; +} + +static int read_short_reg(struct mrf24j40 *devrec, u8 reg, u8 *val) +{ + int ret = -1; + struct spi_message msg; + struct spi_transfer xfer = { + .len = 2, + .tx_buf = devrec->buf, + .rx_buf = devrec->buf, + }; + + spi_message_init(&msg); + spi_message_add_tail(&xfer, &msg); + + mutex_lock(&devrec->buffer_mutex); + devrec->buf[0] = MRF24J40_READSHORT(reg); + devrec->buf[1] = 0; + + ret = spi_sync(devrec->spi, &msg); + if (ret) + dev_err(printdev(devrec), + "SPI read Failed for short register 0x%hhx\n", reg); + else + *val = devrec->buf[1]; + + mutex_unlock(&devrec->buffer_mutex); + return ret; +} + +static int read_long_reg(struct mrf24j40 *devrec, u16 reg, u8 *value) +{ + int ret; + u16 cmd; + struct spi_message msg; + struct spi_transfer xfer = { + .len = 3, + .tx_buf = devrec->buf, + .rx_buf = devrec->buf, + }; + + spi_message_init(&msg); + spi_message_add_tail(&xfer, &msg); + + cmd = MRF24J40_READLONG(reg); + mutex_lock(&devrec->buffer_mutex); + devrec->buf[0] = cmd >> 8 & 0xff; + devrec->buf[1] = cmd & 0xff; + devrec->buf[2] = 0; + + ret = spi_sync(devrec->spi, &msg); + if (ret) + dev_err(printdev(devrec), + "SPI read Failed for long register 0x%hx\n", reg); + else + *value = devrec->buf[2]; + + mutex_unlock(&devrec->buffer_mutex); + return ret; +} + +static int write_long_reg(struct mrf24j40 *devrec, u16 reg, u8 val) +{ + int ret; + u16 cmd; + struct spi_message msg; + struct spi_transfer xfer = { + .len = 3, + .tx_buf = devrec->buf, + .rx_buf = devrec->buf, + }; + + spi_message_init(&msg); + spi_message_add_tail(&xfer, &msg); + + cmd = MRF24J40_WRITELONG(reg); + mutex_lock(&devrec->buffer_mutex); + devrec->buf[0] = cmd >> 8 & 0xff; + devrec->buf[1] = cmd & 0xff; + devrec->buf[2] = val; + + ret = spi_sync(devrec->spi, &msg); + if (ret) + dev_err(printdev(devrec), + "SPI write Failed for long register 0x%hx\n", reg); + + mutex_unlock(&devrec->buffer_mutex); + return ret; +} + +/* This function relies on an undocumented write method. Once a write command + and address is set, as many bytes of data as desired can be clocked into + the device. The datasheet only shows setting one byte at a time. */ +static int write_tx_buf(struct mrf24j40 *devrec, u16 reg, + const u8 *data, size_t length) +{ + int ret; + u16 cmd; + u8 lengths[2]; + struct spi_message msg; + struct spi_transfer addr_xfer = { + .len = 2, + .tx_buf = devrec->buf, + }; + struct spi_transfer lengths_xfer = { + .len = 2, + .tx_buf = &lengths, /* TODO: Is DMA really required for SPI? */ + }; + struct spi_transfer data_xfer = { + .len = length, + .tx_buf = data, + }; + + /* Range check the length. 2 bytes are used for the length fields.*/ + if (length > TX_FIFO_SIZE-2) { + dev_err(printdev(devrec), "write_tx_buf() was passed too large a buffer. Performing short write.\n"); + length = TX_FIFO_SIZE-2; + } + + spi_message_init(&msg); + spi_message_add_tail(&addr_xfer, &msg); + spi_message_add_tail(&lengths_xfer, &msg); + spi_message_add_tail(&data_xfer, &msg); + + cmd = MRF24J40_WRITELONG(reg); + mutex_lock(&devrec->buffer_mutex); + devrec->buf[0] = cmd >> 8 & 0xff; + devrec->buf[1] = cmd & 0xff; + lengths[0] = 0x0; /* Header Length. Set to 0 for now. TODO */ + lengths[1] = length; /* Total length */ + + ret = spi_sync(devrec->spi, &msg); + if (ret) + dev_err(printdev(devrec), "SPI write Failed for TX buf\n"); + + mutex_unlock(&devrec->buffer_mutex); + return ret; +} + +static int mrf24j40_read_rx_buf(struct mrf24j40 *devrec, + u8 *data, u8 *len, u8 *lqi) +{ + u8 rx_len; + u8 addr[2]; + u8 lqi_rssi[2]; + u16 cmd; + int ret; + struct spi_message msg; + struct spi_transfer addr_xfer = { + .len = 2, + .tx_buf = &addr, + }; + struct spi_transfer data_xfer = { + .len = 0x0, /* set below */ + .rx_buf = data, + }; + struct spi_transfer status_xfer = { + .len = 2, + .rx_buf = &lqi_rssi, + }; + + /* Get the length of the data in the RX FIFO. The length in this + * register exclues the 1-byte length field at the beginning. */ + ret = read_long_reg(devrec, REG_RX_FIFO, &rx_len); + if (ret) + goto out; + + /* Range check the RX FIFO length, accounting for the one-byte + * length field at the begining. */ + if (rx_len > RX_FIFO_SIZE-1) { + dev_err(printdev(devrec), "Invalid length read from device. Performing short read.\n"); + rx_len = RX_FIFO_SIZE-1; + } + + if (rx_len > *len) { + /* Passed in buffer wasn't big enough. Should never happen. */ + dev_err(printdev(devrec), "Buffer not big enough. Performing short read\n"); + rx_len = *len; + } + + /* Set up the commands to read the data. */ + cmd = MRF24J40_READLONG(REG_RX_FIFO+1); + addr[0] = cmd >> 8 & 0xff; + addr[1] = cmd & 0xff; + data_xfer.len = rx_len; + + spi_message_init(&msg); + spi_message_add_tail(&addr_xfer, &msg); + spi_message_add_tail(&data_xfer, &msg); + spi_message_add_tail(&status_xfer, &msg); + + ret = spi_sync(devrec->spi, &msg); + if (ret) { + dev_err(printdev(devrec), "SPI RX Buffer Read Failed.\n"); + goto out; + } + + *lqi = lqi_rssi[0]; + *len = rx_len; + +#ifdef DEBUG + print_hex_dump(KERN_DEBUG, "mrf24j40 rx: ", + DUMP_PREFIX_OFFSET, 16, 1, data, *len, 0); + printk(KERN_DEBUG "mrf24j40 rx: lqi: %02hhx rssi: %02hhx\n", + lqi_rssi[0], lqi_rssi[1]); +#endif + +out: + return ret; +} + +static int mrf24j40_tx(struct ieee802154_dev *dev, struct sk_buff *skb) +{ + struct mrf24j40 *devrec = dev->priv; + u8 val; + int ret = 0; + + dev_dbg(printdev(devrec), "tx packet of %d bytes\n", skb->len); + + ret = write_tx_buf(devrec, 0x000, skb->data, skb->len); + if (ret) + goto err; + + /* Set TXNTRIG bit of TXNCON to send packet */ + ret = read_short_reg(devrec, REG_TXNCON, &val); + if (ret) + goto err; + val |= 0x1; + val &= ~0x4; + write_short_reg(devrec, REG_TXNCON, val); + + INIT_COMPLETION(devrec->tx_complete); + + /* Wait for the device to send the TX complete interrupt. */ + ret = wait_for_completion_interruptible_timeout( + &devrec->tx_complete, + 5 * HZ); + if (ret == -ERESTARTSYS) + goto err; + if (ret == 0) { + ret = -ETIMEDOUT; + goto err; + } + + /* Check for send error from the device. */ + ret = read_short_reg(devrec, REG_TXSTAT, &val); + if (ret) + goto err; + if (val & 0x1) { + dev_err(printdev(devrec), "Error Sending. Retry count exceeded\n"); + ret = -ECOMM; /* TODO: Better error code ? */ + } else + dev_dbg(printdev(devrec), "Packet Sent\n"); + +err: + + return ret; +} + +static int mrf24j40_ed(struct ieee802154_dev *dev, u8 *level) +{ + /* TODO: */ + printk(KERN_WARNING "mrf24j40: ed not implemented\n"); + *level = 0; + return 0; +} + +static int mrf24j40_start(struct ieee802154_dev *dev) +{ + struct mrf24j40 *devrec = dev->priv; + u8 val; + int ret; + + dev_dbg(printdev(devrec), "start\n"); + + ret = read_short_reg(devrec, REG_INTCON, &val); + if (ret) + return ret; + val &= ~(0x1|0x8); /* Clear TXNIE and RXIE. Enable interrupts */ + write_short_reg(devrec, REG_INTCON, val); + + return 0; +} + +static void mrf24j40_stop(struct ieee802154_dev *dev) +{ + struct mrf24j40 *devrec = dev->priv; + u8 val; + int ret; + dev_dbg(printdev(devrec), "stop\n"); + + ret = read_short_reg(devrec, REG_INTCON, &val); + if (ret) + return; + val |= 0x1|0x8; /* Set TXNIE and RXIE. Disable Interrupts */ + write_short_reg(devrec, REG_INTCON, val); + + return; +} + +static int mrf24j40_set_channel(struct ieee802154_dev *dev, + int page, int channel) +{ + struct mrf24j40 *devrec = dev->priv; + u8 val; + int ret; + + dev_dbg(printdev(devrec), "Set Channel %d\n", channel); + + WARN_ON(page != 0); + WARN_ON(channel < MRF24J40_CHAN_MIN); + WARN_ON(channel > MRF24J40_CHAN_MAX); + + /* Set Channel TODO */ + val = (channel-11) << 4 | 0x03; + write_long_reg(devrec, REG_RFCON0, val); + + /* RF Reset */ + ret = read_short_reg(devrec, REG_RFCTL, &val); + if (ret) + return ret; + val |= 0x04; + write_short_reg(devrec, REG_RFCTL, val); + val &= ~0x04; + write_short_reg(devrec, REG_RFCTL, val); + + udelay(SET_CHANNEL_DELAY_US); /* per datasheet */ + + return 0; +} + +static int mrf24j40_filter(struct ieee802154_dev *dev, + struct ieee802154_hw_addr_filt *filt, + unsigned long changed) +{ + struct mrf24j40 *devrec = dev->priv; + + dev_dbg(printdev(devrec), "filter\n"); + + if (changed & IEEE802515_AFILT_SADDR_CHANGED) { + /* Short Addr */ + u8 addrh, addrl; + addrh = filt->short_addr >> 8 & 0xff; + addrl = filt->short_addr & 0xff; + + write_short_reg(devrec, REG_SADRH, addrh); + write_short_reg(devrec, REG_SADRL, addrl); + dev_dbg(printdev(devrec), + "Set short addr to %04hx\n", filt->short_addr); + } + + if (changed & IEEE802515_AFILT_IEEEADDR_CHANGED) { + /* Device Address */ + int i; + for (i = 0; i < 8; i++) + write_short_reg(devrec, REG_EADR0+i, + filt->ieee_addr[i]); + +#ifdef DEBUG + printk(KERN_DEBUG "Set long addr to: "); + for (i = 0; i < 8; i++) + printk("%02hhx ", filt->ieee_addr[i]); + printk(KERN_DEBUG "\n"); +#endif + } + + if (changed & IEEE802515_AFILT_PANID_CHANGED) { + /* PAN ID */ + u8 panidl, panidh; + panidh = filt->pan_id >> 8 & 0xff; + panidl = filt->pan_id & 0xff; + write_short_reg(devrec, REG_PANIDH, panidh); + write_short_reg(devrec, REG_PANIDL, panidl); + + dev_dbg(printdev(devrec), "Set PANID to %04hx\n", filt->pan_id); + } + + if (changed & IEEE802515_AFILT_PANC_CHANGED) { + /* Pan Coordinator */ + u8 val; + int ret; + + ret = read_short_reg(devrec, REG_RXMCR, &val); + if (ret) + return ret; + if (filt->pan_coord) + val |= 0x8; + else + val &= ~0x8; + write_short_reg(devrec, REG_RXMCR, val); + + /* REG_SLOTTED is maintained as default (unslotted/CSMA-CA). + * REG_ORDER is maintained as default (no beacon/superframe). + */ + + dev_dbg(printdev(devrec), "Set Pan Coord to %s\n", + filt->pan_coord ? "on" : "off"); + } + + return 0; +} + +static int mrf24j40_handle_rx(struct mrf24j40 *devrec) +{ + u8 len = RX_FIFO_SIZE; + u8 lqi = 0; + u8 val; + int ret = 0; + struct sk_buff *skb; + + /* Turn off reception of packets off the air. This prevents the + * device from overwriting the buffer while we're reading it. */ + ret = read_short_reg(devrec, REG_BBREG1, &val); + if (ret) + goto out; + val |= 4; /* SET RXDECINV */ + write_short_reg(devrec, REG_BBREG1, val); + + skb = alloc_skb(len, GFP_KERNEL); + if (!skb) { + ret = -ENOMEM; + goto out; + } + + ret = mrf24j40_read_rx_buf(devrec, skb_put(skb, len), &len, &lqi); + if (ret < 0) { + dev_err(printdev(devrec), "Failure reading RX FIFO\n"); + kfree_skb(skb); + ret = -EINVAL; + goto out; + } + + /* Cut off the checksum */ + skb_trim(skb, len-2); + + /* TODO: Other drivers call ieee20154_rx_irqsafe() here (eg: cc2040, + * also from a workqueue). I think irqsafe is not necessary here. + * Can someone confirm? */ + ieee802154_rx_irqsafe(devrec->dev, skb, lqi); + + dev_dbg(printdev(devrec), "RX Handled\n"); + +out: + /* Turn back on reception of packets off the air. */ + ret = read_short_reg(devrec, REG_BBREG1, &val); + if (ret) + return ret; + val &= ~0x4; /* Clear RXDECINV */ + write_short_reg(devrec, REG_BBREG1, val); + + return ret; +} + +static struct ieee802154_ops mrf24j40_ops = { + .owner = THIS_MODULE, + .xmit = mrf24j40_tx, + .ed = mrf24j40_ed, + .start = mrf24j40_start, + .stop = mrf24j40_stop, + .set_channel = mrf24j40_set_channel, + .set_hw_addr_filt = mrf24j40_filter, +}; + +static irqreturn_t mrf24j40_isr(int irq, void *data) +{ + struct mrf24j40 *devrec = data; + + disable_irq_nosync(irq); + + schedule_work(&devrec->irqwork); + + return IRQ_HANDLED; +} + +static void mrf24j40_isrwork(struct work_struct *work) +{ + struct mrf24j40 *devrec = container_of(work, struct mrf24j40, irqwork); + u8 intstat; + int ret; + + /* Read the interrupt status */ + ret = read_short_reg(devrec, REG_INTSTAT, &intstat); + if (ret) + goto out; + + /* Check for TX complete */ + if (intstat & 0x1) + complete(&devrec->tx_complete); + + /* Check for Rx */ + if (intstat & 0x8) + mrf24j40_handle_rx(devrec); + +out: + enable_irq(devrec->spi->irq); +} + +static int __devinit mrf24j40_probe(struct spi_device *spi) +{ + int ret = -ENOMEM; + u8 val; + struct mrf24j40 *devrec; + + printk(KERN_INFO "mrf24j40: probe(). IRQ: %d\n", spi->irq); + + devrec = kzalloc(sizeof(struct mrf24j40), GFP_KERNEL); + if (!devrec) + goto err_devrec; + devrec->buf = kzalloc(3, GFP_KERNEL); + if (!devrec->buf) + goto err_buf; + + spi->mode = SPI_MODE_0; /* TODO: Is this appropriate for right here? */ + if (spi->max_speed_hz > MAX_SPI_SPEED_HZ) + spi->max_speed_hz = MAX_SPI_SPEED_HZ; + + mutex_init(&devrec->buffer_mutex); + init_completion(&devrec->tx_complete); + INIT_WORK(&devrec->irqwork, mrf24j40_isrwork); + devrec->spi = spi; + dev_set_drvdata(&spi->dev, devrec); + + /* Register with the 802154 subsystem */ + + devrec->dev = ieee802154_alloc_device(0, &mrf24j40_ops); + if (!devrec->dev) + goto err_alloc_dev; + + devrec->dev->priv = devrec; + devrec->dev->parent = &devrec->spi->dev; + devrec->dev->phy->channels_supported[0] = CHANNEL_MASK; + devrec->dev->flags = IEEE802154_HW_OMIT_CKSUM|IEEE802154_HW_AACK; + + dev_dbg(printdev(devrec), "registered mrf24j40\n"); + ret = ieee802154_register_device(devrec->dev); + if (ret) + goto err_register_device; + + /* Initialize the device. + From datasheet section 3.2: Initialization. */ + write_short_reg(devrec, REG_SOFTRST, 0x07); + write_short_reg(devrec, REG_PACON2, 0x98); + write_short_reg(devrec, REG_TXSTBL, 0x95); + write_long_reg(devrec, REG_RFCON0, 0x03); + write_long_reg(devrec, REG_RFCON1, 0x01); + write_long_reg(devrec, REG_RFCON2, 0x80); + write_long_reg(devrec, REG_RFCON6, 0x90); + write_long_reg(devrec, REG_RFCON7, 0x80); + write_long_reg(devrec, REG_RFCON8, 0x10); + write_long_reg(devrec, REG_SLPCON1, 0x21); + write_short_reg(devrec, REG_BBREG2, 0x80); + write_short_reg(devrec, REG_CCAEDTH, 0x60); + write_short_reg(devrec, REG_BBREG6, 0x40); + write_short_reg(devrec, REG_RFCTL, 0x04); + write_short_reg(devrec, REG_RFCTL, 0x0); + udelay(192); + + /* Set RX Mode. RXMCR<1:0>: 0x0 normal, 0x1 promisc, 0x2 error */ + ret = read_short_reg(devrec, REG_RXMCR, &val); + if (ret) + goto err_read_reg; + val &= ~0x3; /* Clear RX mode (normal) */ + write_short_reg(devrec, REG_RXMCR, val); + + ret = request_irq(spi->irq, + mrf24j40_isr, + IRQF_TRIGGER_FALLING, + dev_name(&spi->dev), + devrec); + + if (ret) { + dev_err(printdev(devrec), "Unable to get IRQ"); + goto err_irq; + } + + return 0; + +err_irq: +err_read_reg: + ieee802154_unregister_device(devrec->dev); +err_register_device: + ieee802154_free_device(devrec->dev); +err_alloc_dev: + kfree(devrec->buf); +err_buf: + kfree(devrec); +err_devrec: + return ret; +} + +static int __devexit mrf24j40_remove(struct spi_device *spi) +{ + struct mrf24j40 *devrec = dev_get_drvdata(&spi->dev); + + dev_dbg(printdev(devrec), "remove\n"); + + free_irq(spi->irq, devrec); + flush_work(&devrec->irqwork); /* TODO: Is this the right call? */ + ieee802154_unregister_device(devrec->dev); + ieee802154_free_device(devrec->dev); + /* TODO: Will ieee802154_free_device() wait until ->xmit() is + * complete? */ + + /* Clean up the SPI stuff. */ + dev_set_drvdata(&spi->dev, NULL); + kfree(devrec->buf); + kfree(devrec); + return 0; +} + +static const struct spi_device_id mrf24j40_ids[] = { + { "mrf24j40", 0 }, + { "mrf24j40ma", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(spi, mrf24j40_ids); + +static struct spi_driver mrf24j40_driver = { + .driver = { + .name = "mrf24j40", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + }, + .id_table = mrf24j40_ids, + .probe = mrf24j40_probe, + .remove = __devexit_p(mrf24j40_remove), +}; + +static int __init mrf24j40_init(void) +{ + return spi_register_driver(&mrf24j40_driver); +} + +static void __exit mrf24j40_exit(void) +{ + spi_unregister_driver(&mrf24j40_driver); +} + +module_init(mrf24j40_init); +module_exit(mrf24j40_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Alan Ott"); +MODULE_DESCRIPTION("MRF24J40 SPI 802.15.4 Controller Driver"); |
