[PATCH 10/10] ieee802154: add at86rf230/rf231 spi driver

Dmitry Eremin-Solenikov
2009-06-01T14:58:34Z

Add a driver handling AT86RF230/RF231 line of chips. Only basic
features are currently implemented (no extended mode operation, etc.)
Also the RF230 chip is not really supported yet.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Sergey Lapin <slapin@ossfans.org>
---
drivers/ieee802154/Kconfig | 5 +
drivers/ieee802154/Makefile | 1 +
drivers/ieee802154/at86rf230.c | 971 ++++++++++++++++++++++++++++++++++++++++
include/linux/spi/at86rf230.h | 32 ++
4 files changed, 1009 insertions(+), 0 deletions(-)
create mode 100644 drivers/ieee802154/at86rf230.c
create mode 100644 include/linux/spi/at86rf230.h

diff --git a/drivers/ieee802154/Kconfig b/drivers/ieee802154/Kconfig
index 0e65572..eff0423 100644
--- a/drivers/ieee802154/Kconfig
+++ b/drivers/ieee802154/Kconfig
@@ -33,5 +33,10 @@ config IEEE802154_FAKELB
config IEEE802154_SERIAL
tristate "Simple LR-WPAN UART driver"

+config IEEE802154_AT86RF230
+ tristate "AT86RF230 transceiver driver"
+ depends on SPI
+
+
endif

diff --git a/drivers/ieee802154/Makefile b/drivers/ieee802154/Makefile
index ca41e99..76237f3 100644
--- a/drivers/ieee802154/Makefile
+++ b/drivers/ieee802154/Makefile
@@ -1,5 +1,6 @@
obj-$(CONFIG_IEEE802154_FAKEHARD) += fakehard.o
obj-$(CONFIG_IEEE802154_FAKELB) += fakelb.o
obj-$(CONFIG_IEEE802154_SERIAL) += serial.o
+obj-$(CONFIG_IEEE802154_AT86RF230) += at86rf230.o

EXTRA_CFLAGS += -DDEBUG -DCONFIG_FFD
diff --git a/drivers/ieee802154/at86rf230.c b/drivers/ieee802154/at86rf230.c
new file mode 100644
index 0000000..a4ead47
--- /dev/null
+++ b/drivers/ieee802154/at86rf230.c
@@ -0,0 +1,971 @@
+#undef AT86RF230_OLDFW_HACK
+/*
+ * AT86RF230/RF231 driver
+ *
+ * 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/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/rtnetlink.h> /* FIXME: hack for slave instantiation */
+
+#include <net/ieee802154/mac802154.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;
+ unsigned irq_disabled:1; /* P: lock */
+ unsigned is_tx:1; /* P: lock */
+};
+
+#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;
+
+ 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_buf = {
+ .len = *len,
+ .rx_buf = data,
+ };
+
+ mutex_lock(&lp->bmux);
+ buf[0] = CMD_FB;
+ buf[1] = 0x00;
+
+ 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]);
+
+ if (!status) {
+ if (lqi && *len > lp->buf[1])
+ *lqi = data[lp->buf[1]];
+
+ *len = lp->buf[1];
+ }
+
+ mutex_unlock(&lp->bmux);
+
+ return status;
+}
+
+static phy_status_t
+at86rf230_ed(struct ieee802154_dev *dev, u8 *level)
+{
+ pr_debug("%s\n", __func__);
+ might_sleep();
+ BUG_ON(!level);
+ *level = 0xbe;
+ return PHY_SUCCESS;
+}
+
+static phy_status_t
+at86rf230_cca(struct ieee802154_dev *dev)
+{
+ pr_debug("%s\n", __func__);
+ might_sleep();
+ return PHY_IDLE;
+}
+
+static phy_status_t
+at86rf230_state(struct ieee802154_dev *dev, phy_status_t state)
+{
+ struct at86rf230_local *lp = dev->priv;
+ int rc;
+ u8 val;
+
+ pr_debug("%s %d\n", __func__/*, priv->cur_state*/, state);
+ might_sleep();
+
+ if (state != PHY_TRX_OFF && state != PHY_RX_ON && state != PHY_TX_ON && state != PHY_FORCE_TRX_OFF)
+ return PHY_INVAL;
+
+ do {
+ rc = at86rf230_read_subreg(lp, SR_TRX_STATUS, &val);
+ if (rc)
+ goto err;
+ pr_debug("%s val1 = %x\n", __func__, val);
+ } while (val == STATE_TRANSITION_IN_PROGRESS);
+
+ if (val == state)
+ goto out;
+
+ /* FIXME: handle all non-standard states here!!! */
+
+ /* 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;
+ pr_debug("%s val2 = %x\n", __func__, val);
+ } while (val == STATE_TRANSITION_IN_PROGRESS);
+
+ if (val == state)
+ val = PHY_SUCCESS;
+
+out:
+ return val;
+
+err:
+ pr_err("%s error: %d\n", __func__, rc);
+ return PHY_ERROR;
+}
+
+static phy_status_t
+at86rf230_channel(struct ieee802154_dev *dev, int channel)
+{
+ struct at86rf230_local *lp = dev->priv;
+ int rc;
+
+ pr_debug("%s %d\n", __func__, channel);
+ might_sleep();
+
+ BUG_ON(channel < 11);
+ BUG_ON(channel > 26);
+
+ rc = at86rf230_write_subreg(lp, SR_CHANNEL, channel);
+ msleep(1); /* Wait for PLL */
+ dev->current_channel = channel;
+
+ return PHY_SUCCESS;
+}
+
+static int
+at86rf230_tx(struct ieee802154_dev *dev, struct sk_buff *skb)
+{
+ char *data;
+ struct at86rf230_local *lp = dev->priv;
+ int rc;
+ unsigned long flags;
+
+ pr_debug("%s\n", __func__);
+
+ might_sleep();
+
+#ifdef AT86RF230_OLDFW_HACK
+ data = skb_push(skb, 2);
+ data[0] = 0x7e;
+ data[1] = 0xff;
+#else
+ data = skb_push(skb, 0); /* FIXME: find a better way */
+#endif
+
+ spin_lock_irqsave(&lp->lock, flags);
+ BUG_ON(lp->is_tx);
+ lp->is_tx = 1;
+ INIT_COMPLETION(lp->tx_complete);
+ spin_unlock_irqrestore(&lp->lock, flags);
+
+ rc = at86rf230_write_fbuf(lp, data, skb->len);
+ if (rc)
+ goto err;
+
+ if (gpio_is_valid(lp->slp_tr)) {
+ gpio_set_value(lp->slp_tr, 1);
+ } else {
+ rc = at86rf230_write_subreg(lp, SR_TRX_CMD, STATE_BUSY_TX);
+ if (rc)
+ goto err;
+ }
+
+ rc = wait_for_completion_interruptible(&lp->tx_complete);
+
+ gpio_set_value(lp->slp_tr, 0);
+
+ if (rc < 0)
+ goto err;
+
+ return PHY_SUCCESS;
+err:
+ spin_lock_irqsave(&lp->lock, flags);
+ lp->is_tx = 0;
+ spin_unlock_irqrestore(&lp->lock, flags);
+
+ return PHY_ERROR;
+}
+
+static int at86rf230_rx(struct at86rf230_local *lp)
+{
+ u8 len = 128;
+ u8 lqi = 0;
+ int rc;
+ struct sk_buff *skb;
+
+ skb = alloc_skb(len, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ rc = at86rf230_read_fbuf(lp, skb_put(skb, len), &len, &lqi);
+ if (len < 2) {
+ kfree_skb(skb);
+ return -EINVAL;
+ }
+
+ skb_trim(skb, len-2); /* We do not put CRC into the frame */
+
+ if (len < 2) {
+ kfree_skb(skb);
+ return -EINVAL;
+ }
+
+#ifdef AT86RF230_OLDFW_HACK
+ skb_pull(skb, 2);
+#endif
+ ieee802154_rx_irqsafe(lp->dev, skb, lqi);
+
+ dev_dbg(&lp->spi->dev, "READ_FBUF: %d %d %x\n", rc, len, lqi);
+
+ return 0;
+}
+
+static struct ieee802154_ops at86rf230_ops = {
+ .owner = THIS_MODULE,
+ .tx = at86rf230_tx,
+ .ed = at86rf230_ed,
+ .cca = at86rf230_cca,
+ .set_trx_state = at86rf230_state,
+ .set_channel = at86rf230_channel,
+};
+
+static int at86rf230_register(struct at86rf230_local *lp)
+{
+ int rc = -ENOMEM;
+
+ lp->dev = ieee802154_alloc_device();
+ if (!lp->dev)
+ goto err_alloc;
+
+ lp->dev->name = dev_name(&lp->spi->dev);
+ lp->dev->priv = lp;
+ lp->dev->parent = &lp->spi->dev;
+#ifdef AT86RF230_OLDFW_HACK
+ lp->dev->extra_tx_headroom = 2;
+#else
+ lp->dev->extra_tx_headroom = 0;
+#endif
+ lp->dev->channel_mask = 0x7ff; /* We do support only 2.4 Ghz */
+ lp->dev->flags = IEEE802154_FLAGS_OMIT_CKSUM;
+
+ rc = ieee802154_register_device(lp->dev, &at86rf230_ops);
+ if (rc)
+ goto err_register;
+
+ /* FIXME: remove this after we have proper support for slave instantiation from iz tool */
+ rtnl_lock();
+ rc = ieee802154_add_slave(lp->dev, "\xde\xad\xbe\xaf\xca\xfe\xba\xbe");
+ rtnl_unlock();
+ if (rc < 0)
+ goto err_slave;
+
+ return 0;
+
+err_slave:
+ ieee802154_unregister_device(lp->dev);
+err_register:
+ ieee802154_free_device(lp->dev);
+err_alloc:
+ return rc;
+}
+
+static void at86rf230_unregister(struct at86rf230_local *lp)
+{
+ ieee802154_unregister_device(lp->dev);
+ ieee802154_free_device(lp->dev);
+}
+
+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;
+
+ dev_dbg(&lp->spi->dev, "IRQ Worker\n");
+
+ do {
+ rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0xff, 0, &val);
+ status |= val;
+ dev_dbg(&lp->spi->dev, "IRQ Status: %02x\n", status);
+
+ 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;
+ spin_lock_irqsave(&lp->lock, flags);
+ 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);
+ }
+ }
+
+ } while (status != 0);
+
+ spin_lock_irqsave(&lp->lock, flags);
+ 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;
+
+ dev_dbg(&lp->spi->dev, "IRQ!\n");
+
+ 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,
+ /*IRQ_TRX_UR | IRQ_CCA_ED | IRQ_TRX_END | IRQ_PLL_UNL | IRQ_PLL_LOCK*/ 0xff);
+ if (rc)
+ return rc;
+
+ rc = at86rf230_write_subreg(lp, SR_CLKM_SHA_SEL, 0x00); /* CLKM changes are applied immediately */
+ if (rc)
+ return rc;
+
+ rc = at86rf230_write_subreg(lp, SR_CLKM_CTRL, 0x00); /* Turn CLKM Off */
+ if (rc)
+ return rc;
+
+ 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 __devinit at86rf230_probe(struct spi_device *spi)
+{
+ struct at86rf230_local *lp = kzalloc(sizeof *lp, GFP_KERNEL);
+ u8 man_id_0, man_id_1;
+ int rc;
+ const char *chip;
+ int supported = 0;
+ struct at86rf230_platform_data *pdata = spi->dev.platform_data;
+
+ if (!lp)
+ return -ENOMEM;
+
+ if (!pdata) {
+ dev_err(&spi->dev, "no platform_data\n");
+ rc = -EINVAL;
+ goto err;
+ }
+
+ if (!spi->irq) {
+ dev_err(&spi->dev, "no IRQ specified\n");
+ rc = -EINVAL;
+ goto err;
+ }
+
+ lp->spi = spi;
+
+ lp->rstn = pdata->rstn;
+ lp->slp_tr = pdata->slp_tr;
+ lp->dig2 = pdata->dig2;
+
+ 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 = 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 device 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;
+
+ dev_dbg(&spi->dev, "registered at86rf230\n");
+
+ rc = at86rf230_register(lp);
+ if (rc)
+ goto err_irq;
+
+ return rc;
+
+ at86rf230_unregister(lp);
+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:
+ spi_set_drvdata(spi, NULL);
+ mutex_destroy(&lp->bmux);
+ kfree(lp);
+ return rc;
+}
+
+static int __devexit at86rf230_remove(struct spi_device *spi)
+{
+ struct at86rf230_local *lp = spi_get_drvdata(spi);
+
+ at86rf230_unregister(lp);
+
+ 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);
+ kfree(lp);
+
+ 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");
+
diff --git a/include/linux/spi/at86rf230.h b/include/linux/spi/at86rf230.h
new file mode 100644
index 0000000..aa8e250
--- /dev/null
+++ b/include/linux/spi/at86rf230.h
@@ -0,0 +1,32 @@
+/*
+ * AT86RF230/RF231 driver
+ *
+ * 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>
+ */
+#ifndef AT86RF230_H
+#define AT86RF230_H
+
+struct at86rf230_platform_data {
+ int rstn;
+ int slp_tr;
+ int dig2;
+};
+
+#endif
+
--
1.6.2.4