* Written by:
* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
+ * Alexander Aring <aar@pengutronix.de>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/irq.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/regmap.h>
#include <linux/skbuff.h>
#include <linux/of_gpio.h>
+#include <net/ieee802154.h>
#include <net/mac802154.h>
#include <net/wpan-phy.h>
-struct at86rf230_local {
- struct spi_device *spi;
+struct at86rf230_local;
+/* at86rf2xx chip depend data.
+ * All timings are in us.
+ */
+struct at86rf2xx_chip_data {
+ u16 t_sleep_cycle;
+ u16 t_channel_switch;
+ u16 t_reset_to_off;
+ u16 t_off_to_aack;
+ u16 t_off_to_tx_on;
+ u16 t_frame;
+ u16 t_p_ack;
+ /* short interframe spacing time */
+ u16 t_sifs;
+ /* long interframe spacing time */
+ u16 t_lifs;
+ /* completion timeout for tx in msecs */
+ u16 t_tx_timeout;
+ int rssi_base_val;
- u8 part;
- u8 vers;
+ int (*set_channel)(struct at86rf230_local *, int, int);
+ int (*get_desense_steps)(struct at86rf230_local *, s32);
+};
- u8 buf[2];
- struct mutex bmux;
+#define AT86RF2XX_MAX_BUF (127 + 3)
- struct work_struct irqwork;
- struct completion tx_complete;
+struct at86rf230_state_change {
+ struct at86rf230_local *lp;
+
+ struct spi_message msg;
+ struct spi_transfer trx;
+ u8 buf[AT86RF2XX_MAX_BUF];
+
+ void (*complete)(void *context);
+ u8 from_state;
+ u8 to_state;
+};
+
+struct at86rf230_local {
+ struct spi_device *spi;
struct ieee802154_dev *dev;
+ struct at86rf2xx_chip_data *data;
+ struct regmap *regmap;
- spinlock_t lock;
- bool irq_busy;
- bool is_tx;
- bool tx_aret;
+ struct completion state_complete;
+ struct at86rf230_state_change state;
- int rssi_base_val;
-};
+ struct at86rf230_state_change irq;
-static bool is_rf212(struct at86rf230_local *local)
-{
- return local->part == 7;
-}
+ bool tx_aret;
+ bool is_tx;
+ /* spinlock for is_tx protection */
+ spinlock_t lock;
+ struct completion tx_complete;
+ struct sk_buff *tx_skb;
+ struct at86rf230_state_change tx;
+};
#define RG_TRX_STATUS (0x01)
#define SR_TRX_STATUS 0x01, 0x1f, 0
#define STATE_BUSY_RX_AACK_NOCLK 0x1E
#define STATE_TRANSITION_IN_PROGRESS 0x1F
+#define AT86RF2XX_NUMREGS 0x3F
+
static int
-__at86rf230_detect_device(struct spi_device *spi, u16 *man_id, u8 *part,
- u8 *version)
+at86rf230_async_state_change(struct at86rf230_local *lp,
+ struct at86rf230_state_change *ctx,
+ const u8 state, void (*complete)(void *context));
+
+static inline int
+__at86rf230_write(struct at86rf230_local *lp,
+ unsigned int addr, unsigned int data)
{
- u8 data[4];
- u8 *buf = kmalloc(2, GFP_KERNEL);
- int status;
- struct spi_message msg;
- struct spi_transfer xfer = {
- .len = 2,
- .tx_buf = buf,
- .rx_buf = buf,
- };
- u8 reg;
-
- if (!buf)
- return -ENOMEM;
+ return regmap_write(lp->regmap, addr, data);
+}
- for (reg = RG_PART_NUM; reg <= RG_MAN_ID_1; reg++) {
- buf[0] = (reg & CMD_REG_MASK) | CMD_REG;
- buf[1] = 0xff;
- dev_vdbg(&spi->dev, "buf[0] = %02x\n", buf[0]);
- spi_message_init(&msg);
- spi_message_add_tail(&xfer, &msg);
+static inline int
+__at86rf230_read(struct at86rf230_local *lp,
+ unsigned int addr, unsigned int *data)
+{
+ return regmap_read(lp->regmap, addr, data);
+}
- status = spi_sync(spi, &msg);
- dev_vdbg(&spi->dev, "status = %d\n", status);
- if (msg.status)
- status = msg.status;
+static inline int
+at86rf230_read_subreg(struct at86rf230_local *lp,
+ unsigned int addr, unsigned int mask,
+ unsigned int shift, unsigned int *data)
+{
+ int rc;
- dev_vdbg(&spi->dev, "status = %d\n", status);
- dev_vdbg(&spi->dev, "buf[0] = %02x\n", buf[0]);
- dev_vdbg(&spi->dev, "buf[1] = %02x\n", buf[1]);
+ rc = __at86rf230_read(lp, addr, data);
+ if (rc > 0)
+ *data = (*data & mask) >> shift;
- if (status == 0)
- data[reg - RG_PART_NUM] = buf[1];
- else
- break;
+ return rc;
+}
+
+static inline int
+at86rf230_write_subreg(struct at86rf230_local *lp,
+ unsigned int addr, unsigned int mask,
+ unsigned int shift, unsigned int data)
+{
+ return regmap_update_bits(lp->regmap, addr, mask, data << shift);
+}
+
+static bool
+at86rf230_reg_writeable(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case RG_TRX_STATE:
+ case RG_TRX_CTRL_0:
+ case RG_TRX_CTRL_1:
+ case RG_PHY_TX_PWR:
+ case RG_PHY_ED_LEVEL:
+ case RG_PHY_CC_CCA:
+ case RG_CCA_THRES:
+ case RG_RX_CTRL:
+ case RG_SFD_VALUE:
+ case RG_TRX_CTRL_2:
+ case RG_ANT_DIV:
+ case RG_IRQ_MASK:
+ case RG_VREG_CTRL:
+ case RG_BATMON:
+ case RG_XOSC_CTRL:
+ case RG_RX_SYN:
+ case RG_XAH_CTRL_1:
+ case RG_FTN_CTRL:
+ case RG_PLL_CF:
+ case RG_PLL_DCU:
+ case RG_SHORT_ADDR_0:
+ case RG_SHORT_ADDR_1:
+ case RG_PAN_ID_0:
+ case RG_PAN_ID_1:
+ case RG_IEEE_ADDR_0:
+ case RG_IEEE_ADDR_1:
+ case RG_IEEE_ADDR_2:
+ case RG_IEEE_ADDR_3:
+ case RG_IEEE_ADDR_4:
+ case RG_IEEE_ADDR_5:
+ case RG_IEEE_ADDR_6:
+ case RG_IEEE_ADDR_7:
+ case RG_XAH_CTRL_0:
+ case RG_CSMA_SEED_0:
+ case RG_CSMA_SEED_1:
+ case RG_CSMA_BE:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool
+at86rf230_reg_readable(struct device *dev, unsigned int reg)
+{
+ bool rc;
+
+ /* all writeable are also readable */
+ rc = at86rf230_reg_writeable(dev, reg);
+ if (rc)
+ return rc;
+
+ /* readonly regs */
+ switch (reg) {
+ case RG_TRX_STATUS:
+ case RG_PHY_RSSI:
+ case RG_IRQ_STATUS:
+ case RG_PART_NUM:
+ case RG_VERSION_NUM:
+ case RG_MAN_ID_1:
+ case RG_MAN_ID_0:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool
+at86rf230_reg_volatile(struct device *dev, unsigned int reg)
+{
+ /* can be changed during runtime */
+ switch (reg) {
+ case RG_TRX_STATUS:
+ case RG_TRX_STATE:
+ case RG_PHY_RSSI:
+ case RG_PHY_ED_LEVEL:
+ case RG_IRQ_STATUS:
+ case RG_VREG_CTRL:
+ return true;
+ default:
+ return false;
}
+}
- if (status == 0) {
- *part = data[0];
- *version = data[1];
- *man_id = (data[3] << 8) | data[2];
+static bool
+at86rf230_reg_precious(struct device *dev, unsigned int reg)
+{
+ /* don't clear irq line on read */
+ switch (reg) {
+ case RG_IRQ_STATUS:
+ return true;
+ default:
+ return false;
}
+}
- kfree(buf);
+static struct regmap_config at86rf230_regmap_spi_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .write_flag_mask = CMD_REG | CMD_WRITE,
+ .read_flag_mask = CMD_REG,
+ .cache_type = REGCACHE_RBTREE,
+ .max_register = AT86RF2XX_NUMREGS,
+ .writeable_reg = at86rf230_reg_writeable,
+ .readable_reg = at86rf230_reg_readable,
+ .volatile_reg = at86rf230_reg_volatile,
+ .precious_reg = at86rf230_reg_precious,
+};
- return status;
+static void
+at86rf230_async_error_recover(void *context)
+{
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+
+ at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON, NULL);
}
-static int
-__at86rf230_write(struct at86rf230_local *lp, u8 addr, u8 data)
+static void
+at86rf230_async_error(struct at86rf230_local *lp,
+ struct at86rf230_state_change *ctx, int rc)
{
- 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;
+ dev_err(&lp->spi->dev, "spi_async error %d\n", rc);
+
+ at86rf230_async_state_change(lp, ctx, STATE_FORCE_TRX_OFF,
+ at86rf230_async_error_recover);
}
+/* Generic function to get some register value in async mode */
static int
-__at86rf230_read_subreg(struct at86rf230_local *lp,
- u8 addr, u8 mask, int shift, u8 *data)
+at86rf230_async_read_reg(struct at86rf230_local *lp, const u8 reg,
+ struct at86rf230_state_change *ctx,
+ void (*complete)(void *context))
{
- 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] & mask) >> shift;
-
- return status;
+ u8 *tx_buf = ctx->buf;
+
+ tx_buf[0] = (reg & CMD_REG_MASK) | CMD_REG;
+ ctx->trx.len = 2;
+ ctx->msg.complete = complete;
+ return spi_async(lp->spi, &ctx->msg);
}
-static int
-at86rf230_read_subreg(struct at86rf230_local *lp,
- u8 addr, u8 mask, int shift, u8 *data)
+static void
+at86rf230_async_state_assert(void *context)
{
- int status;
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+ const u8 *buf = ctx->buf;
+ const u8 trx_state = buf[1] & 0x1f;
+
+ /* Assert state change */
+ if (trx_state != ctx->to_state) {
+ /* Special handling if transceiver state is in
+ * STATE_BUSY_RX_AACK and a SHR was detected.
+ */
+ if (trx_state == STATE_BUSY_RX_AACK) {
+ /* Undocumented race condition. If we send a state
+ * change to STATE_RX_AACK_ON the transceiver could
+ * change his state automatically to STATE_BUSY_RX_AACK
+ * if a SHR was detected. This is not an error, but we
+ * can't assert this.
+ */
+ if (ctx->to_state == STATE_RX_AACK_ON)
+ goto done;
+
+ /* If we change to STATE_TX_ON without forcing and
+ * transceiver state is STATE_BUSY_RX_AACK, we wait
+ * 'tFrame + tPAck' receiving time. In this time the
+ * PDU should be received. If the transceiver is still
+ * in STATE_BUSY_RX_AACK, we run a force state change
+ * to STATE_TX_ON. This is a timeout handling, if the
+ * transceiver stucks in STATE_BUSY_RX_AACK.
+ */
+ if (ctx->to_state == STATE_TX_ON) {
+ at86rf230_async_state_change(lp, ctx,
+ STATE_FORCE_TX_ON,
+ ctx->complete);
+ return;
+ }
+ }
+
- mutex_lock(&lp->bmux);
- status = __at86rf230_read_subreg(lp, addr, mask, shift, data);
- mutex_unlock(&lp->bmux);
+ dev_warn(&lp->spi->dev, "unexcept state change from 0x%02x to 0x%02x. Actual state: 0x%02x\n",
+ ctx->from_state, ctx->to_state, trx_state);
+ }
- return status;
+done:
+ if (ctx->complete)
+ ctx->complete(context);
}
-static int
-at86rf230_write_subreg(struct at86rf230_local *lp,
- u8 addr, u8 mask, int shift, u8 data)
+/* Do state change timing delay. */
+static void
+at86rf230_async_state_delay(void *context)
+{
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+ struct at86rf2xx_chip_data *c = lp->data;
+ bool force = false;
+ int rc;
+
+ /* The force state changes are will show as normal states in the
+ * state status subregister. We change the to_state to the
+ * corresponding one and remember if it was a force change, this
+ * differs if we do a state change from STATE_BUSY_RX_AACK.
+ */
+ switch (ctx->to_state) {
+ case STATE_FORCE_TX_ON:
+ ctx->to_state = STATE_TX_ON;
+ force = true;
+ break;
+ case STATE_FORCE_TRX_OFF:
+ ctx->to_state = STATE_TRX_OFF;
+ force = true;
+ break;
+ default:
+ break;
+ }
+
+ switch (ctx->from_state) {
+ case STATE_TRX_OFF:
+ switch (ctx->to_state) {
+ case STATE_RX_AACK_ON:
+ usleep_range(c->t_off_to_aack, c->t_off_to_aack + 10);
+ goto change;
+ case STATE_TX_ON:
+ usleep_range(c->t_off_to_tx_on,
+ c->t_off_to_tx_on + 10);
+ goto change;
+ default:
+ break;
+ }
+ break;
+ case STATE_BUSY_RX_AACK:
+ switch (ctx->to_state) {
+ case STATE_TX_ON:
+ /* Wait for worst case receiving time if we
+ * didn't make a force change from BUSY_RX_AACK
+ * to TX_ON.
+ */
+ if (!force) {
+ usleep_range(c->t_frame + c->t_p_ack,
+ c->t_frame + c->t_p_ack + 1000);
+ goto change;
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ /* Default value, means RESET state */
+ case STATE_P_ON:
+ switch (ctx->to_state) {
+ case STATE_TRX_OFF:
+ usleep_range(c->t_reset_to_off, c->t_reset_to_off + 10);
+ goto change;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ /* Default delay is 1us in the most cases */
+ udelay(1);
+
+change:
+ rc = at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
+ at86rf230_async_state_assert);
+ if (rc)
+ dev_err(&lp->spi->dev, "spi_async error %d\n", rc);
+}
+
+static void
+at86rf230_async_state_change_start(void *context)
{
- int status;
- u8 val;
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+ u8 *buf = ctx->buf;
+ const u8 trx_state = buf[1] & 0x1f;
+ int rc;
- mutex_lock(&lp->bmux);
- status = __at86rf230_read_subreg(lp, addr, 0xff, 0, &val);
- if (status)
- goto out;
+ /* Check for "possible" STATE_TRANSITION_IN_PROGRESS */
+ if (trx_state == STATE_TRANSITION_IN_PROGRESS) {
+ udelay(1);
+ rc = at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
+ at86rf230_async_state_change_start);
+ if (rc)
+ dev_err(&lp->spi->dev, "spi_async error %d\n", rc);
+ return;
+ }
- val &= ~mask;
- val |= (data << shift) & mask;
+ /* Check if we already are in the state which we change in */
+ if (trx_state == ctx->to_state) {
+ if (ctx->complete)
+ ctx->complete(context);
+ return;
+ }
- status = __at86rf230_write(lp, addr, val);
-out:
- mutex_unlock(&lp->bmux);
+ /* Set current state to the context of state change */
+ ctx->from_state = trx_state;
- return status;
+ /* Going into the next step for a state change which do a timing
+ * relevant delay.
+ */
+ buf[0] = (RG_TRX_STATE & CMD_REG_MASK) | CMD_REG | CMD_WRITE;
+ buf[1] = ctx->to_state;
+ ctx->trx.len = 2;
+ ctx->msg.complete = at86rf230_async_state_delay;
+ rc = spi_async(lp->spi, &ctx->msg);
+ if (rc)
+ dev_err(&lp->spi->dev, "spi_async error %d\n", rc);
}
static int
-at86rf230_write_fbuf(struct at86rf230_local *lp, u8 *data, u8 len)
+at86rf230_async_state_change(struct at86rf230_local *lp,
+ struct at86rf230_state_change *ctx,
+ const u8 state, void (*complete)(void *context))
{
- 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;
+ /* Initialization for the state change context */
+ ctx->to_state = state;
+ ctx->complete = complete;
+ return at86rf230_async_read_reg(lp, RG_TRX_STATUS, ctx,
+ at86rf230_async_state_change_start);
}
+static void
+at86rf230_sync_state_change_complete(void *context)
+{
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+
+ complete(&lp->state_complete);
+}
+
+/* This function do a sync framework above the async state change.
+ * Some callbacks of the IEEE 802.15.4 driver interface need to be
+ * handled synchronously.
+ */
static int
-at86rf230_read_fbuf(struct at86rf230_local *lp, u8 *data, u8 *len, u8 *lqi)
+at86rf230_sync_state_change(struct at86rf230_local *lp, unsigned int state)
{
- 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);
+ int rc;
- buf[0] = CMD_FB;
- buf[1] = 0x00;
+ rc = at86rf230_async_state_change(lp, &lp->state, state,
+ at86rf230_sync_state_change_complete);
+ if (rc) {
+ at86rf230_async_error(lp, &lp->state, rc);
+ return rc;
+ }
- spi_message_init(&msg);
- spi_message_add_tail(&xfer_head, &msg);
+ rc = wait_for_completion_timeout(&lp->state_complete,
+ msecs_to_jiffies(100));
+ if (!rc)
+ return -ETIMEDOUT;
- status = spi_sync(lp->spi, &msg);
- dev_vdbg(&lp->spi->dev, "status = %d\n", status);
+ return 0;
+}
- xfer_buf.len = *(buf + 1) + 1;
- *len = buf[1];
+static void
+at86rf230_tx_complete(void *context)
+{
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
- buf[0] = CMD_FB;
- buf[1] = 0x00;
+ complete(&lp->tx_complete);
+}
- spi_message_init(&msg);
- spi_message_add_tail(&xfer_head1, &msg);
- spi_message_add_tail(&xfer_buf, &msg);
+static void
+at86rf230_tx_on(void *context)
+{
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+ int rc;
+
+ rc = at86rf230_async_state_change(lp, &lp->irq, STATE_RX_AACK_ON,
+ at86rf230_tx_complete);
+ if (rc)
+ at86rf230_async_error(lp, ctx, rc);
+}
- status = spi_sync(lp->spi, &msg);
+static void
+at86rf230_tx_trac_error(void *context)
+{
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+ int rc;
- if (msg.status)
- status = msg.status;
+ rc = at86rf230_async_state_change(lp, ctx, STATE_TX_ON,
+ at86rf230_tx_on);
+ if (rc)
+ at86rf230_async_error(lp, ctx, rc);
+}
- 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]);
+static void
+at86rf230_tx_trac_check(void *context)
+{
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+ const u8 *buf = ctx->buf;
+ const u8 trac = (buf[1] & 0xe0) >> 5;
+ int rc;
- if (status) {
- if (lqi && (*len > lp->buf[1]))
- *lqi = data[lp->buf[1]];
+ /* If trac status is different than zero we need to do a state change
+ * to STATE_FORCE_TRX_OFF then STATE_TX_ON to recover the transceiver
+ * state to TX_ON.
+ */
+ if (trac) {
+ rc = at86rf230_async_state_change(lp, ctx, STATE_FORCE_TRX_OFF,
+ at86rf230_tx_trac_error);
+ if (rc)
+ at86rf230_async_error(lp, ctx, rc);
+ return;
}
- mutex_unlock(&lp->bmux);
- return status;
+ at86rf230_tx_on(context);
}
-static int
-at86rf230_ed(struct ieee802154_dev *dev, u8 *level)
+
+static void
+at86rf230_tx_trac_status(void *context)
{
- might_sleep();
- BUG_ON(!level);
- *level = 0xbe;
- return 0;
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+ int rc;
+
+ rc = at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
+ at86rf230_tx_trac_check);
+ if (rc)
+ at86rf230_async_error(lp, ctx, rc);
+}
+
+static void
+at86rf230_rx(struct at86rf230_local *lp,
+ const u8 *data, u8 len)
+{
+ u8 lqi;
+ struct sk_buff *skb;
+ u8 rx_local_buf[AT86RF2XX_MAX_BUF];
+
+ if (len < 2)
+ return;
+
+ /* read full frame buffer and invalid lqi value to lowest
+ * indicator if frame was is in a corrupted state.
+ */
+ if (len > IEEE802154_MTU) {
+ lqi = 0;
+ len = IEEE802154_MTU;
+ dev_vdbg(&lp->spi->dev, "corrupted frame received\n");
+ } else {
+ lqi = data[len];
+ }
+
+ memcpy(rx_local_buf, data, len);
+ enable_irq(lp->spi->irq);
+
+ skb = alloc_skb(IEEE802154_MTU, GFP_ATOMIC);
+ if (!skb) {
+ dev_vdbg(&lp->spi->dev, "failed to allocate sk_buff\n");
+ return;
+ }
+
+ memcpy(skb_put(skb, len), rx_local_buf, len);
+
+ /* We do not put CRC into the frame */
+ skb_trim(skb, len - 2);
+
+ ieee802154_rx_irqsafe(lp->dev, skb, lqi);
+}
+
+static void
+at86rf230_rx_read_frame_complete(void *context)
+{
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+ const u8 *buf = lp->irq.buf;
+ const u8 len = buf[1];
+
+ at86rf230_rx(lp, buf + 2, len);
}
static int
-at86rf230_state(struct ieee802154_dev *dev, int state)
+at86rf230_rx_read_frame(struct at86rf230_local *lp)
{
- struct at86rf230_local *lp = dev->priv;
+ u8 *buf = lp->irq.buf;
+
+ buf[0] = CMD_FB;
+ lp->irq.trx.len = AT86RF2XX_MAX_BUF;
+ lp->irq.msg.complete = at86rf230_rx_read_frame_complete;
+ return spi_async(lp->spi, &lp->irq.msg);
+}
+
+static void
+at86rf230_rx_trac_check(void *context)
+{
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
int rc;
- u8 val;
- u8 desired_status;
- might_sleep();
+ /* Possible check on trac status here. This could be useful to make
+ * some stats why receive is failed. Not used at the moment, but it's
+ * maybe timing relevant. Datasheet doesn't say anything about this.
+ * The programming guide say do it so.
+ */
- 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;
+ rc = at86rf230_rx_read_frame(lp);
+ if (rc) {
+ enable_irq(lp->spi->irq);
+ at86rf230_async_error(lp, ctx, rc);
+ }
+}
+
+static int
+at86rf230_irq_trx_end(struct at86rf230_local *lp)
+{
+ spin_lock(&lp->lock);
+ if (lp->is_tx) {
+ lp->is_tx = 0;
+ spin_unlock(&lp->lock);
+ enable_irq(lp->spi->irq);
+
+ if (lp->tx_aret)
+ return at86rf230_async_state_change(lp, &lp->irq,
+ STATE_FORCE_TX_ON,
+ at86rf230_tx_trac_status);
+ else
+ return at86rf230_async_state_change(lp, &lp->irq,
+ STATE_RX_AACK_ON,
+ at86rf230_tx_complete);
+ } else {
+ spin_unlock(&lp->lock);
+ return at86rf230_async_read_reg(lp, RG_TRX_STATE, &lp->irq,
+ at86rf230_rx_trac_check);
+ }
+}
- do {
- rc = at86rf230_read_subreg(lp, SR_TRX_STATUS, &val);
+static void
+at86rf230_irq_status(void *context)
+{
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+ const u8 *buf = lp->irq.buf;
+ const u8 irq = buf[1];
+ int rc;
+
+ if (irq & IRQ_TRX_END) {
+ rc = at86rf230_irq_trx_end(lp);
if (rc)
- goto err;
- } while (val == STATE_TRANSITION_IN_PROGRESS);
+ at86rf230_async_error(lp, ctx, rc);
+ } else {
+ enable_irq(lp->spi->irq);
+ dev_err(&lp->spi->dev, "not supported irq %02x received\n",
+ irq);
+ }
+}
- if (val == desired_status)
- return 0;
+static irqreturn_t at86rf230_isr(int irq, void *data)
+{
+ struct at86rf230_local *lp = data;
+ struct at86rf230_state_change *ctx = &lp->irq;
+ u8 *buf = ctx->buf;
+ int rc;
- /* state is equal to phy states */
- rc = at86rf230_write_subreg(lp, SR_TRX_CMD, state);
- if (rc)
- goto err;
+ disable_irq_nosync(lp->spi->irq);
- do {
- rc = at86rf230_read_subreg(lp, SR_TRX_STATUS, &val);
- if (rc)
- goto err;
- } while (val == STATE_TRANSITION_IN_PROGRESS);
+ buf[0] = (RG_IRQ_STATUS & CMD_REG_MASK) | CMD_REG;
+ ctx->trx.len = 2;
+ ctx->msg.complete = at86rf230_irq_status;
+ rc = spi_async(lp->spi, &ctx->msg);
+ if (rc) {
+ at86rf230_async_error(lp, ctx, rc);
+ return IRQ_NONE;
+ }
+ return IRQ_HANDLED;
+}
- if (val == desired_status ||
- (desired_status == STATE_RX_ON && val == STATE_BUSY_RX) ||
- (desired_status == STATE_RX_AACK_ON && val == STATE_BUSY_RX_AACK))
- return 0;
+static void
+at86rf230_write_frame_complete(void *context)
+{
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+ u8 *buf = ctx->buf;
+ int rc;
- pr_err("unexpected state change: %d, asked for %d\n", val, state);
- return -EBUSY;
+ buf[0] = (RG_TRX_STATE & CMD_REG_MASK) | CMD_REG | CMD_WRITE;
+ buf[1] = STATE_BUSY_TX;
+ ctx->trx.len = 2;
+ ctx->msg.complete = NULL;
+ rc = spi_async(lp->spi, &ctx->msg);
+ if (rc)
+ at86rf230_async_error(lp, ctx, rc);
+}
-err:
- pr_err("error: %d\n", rc);
- return rc;
+static void
+at86rf230_write_frame(void *context)
+{
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+ struct sk_buff *skb = lp->tx_skb;
+ u8 *buf = lp->tx.buf;
+ int rc;
+
+ spin_lock(&lp->lock);
+ lp->is_tx = 1;
+ spin_unlock(&lp->lock);
+
+ buf[0] = CMD_FB | CMD_WRITE;
+ buf[1] = skb->len + 2;
+ memcpy(buf + 2, skb->data, skb->len);
+ lp->tx.trx.len = skb->len + 2;
+ lp->tx.msg.complete = at86rf230_write_frame_complete;
+ rc = spi_async(lp->spi, &lp->tx.msg);
+ if (rc)
+ at86rf230_async_error(lp, ctx, rc);
+}
+
+static void
+at86rf230_xmit_tx_on(void *context)
+{
+ struct at86rf230_state_change *ctx = context;
+ struct at86rf230_local *lp = ctx->lp;
+ int rc;
+
+ rc = at86rf230_async_state_change(lp, ctx, STATE_TX_ARET_ON,
+ at86rf230_write_frame);
+ if (rc)
+ at86rf230_async_error(lp, ctx, rc);
}
static int
-at86rf230_start(struct ieee802154_dev *dev)
+at86rf230_xmit(struct ieee802154_dev *dev, struct sk_buff *skb)
{
struct at86rf230_local *lp = dev->priv;
- u8 rc;
+ struct at86rf230_state_change *ctx = &lp->tx;
- rc = at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1);
- if (rc)
- return rc;
+ void (*tx_complete)(void *context) = at86rf230_write_frame;
+ int rc;
- rc = at86rf230_state(dev, STATE_TX_ON);
- if (rc)
+ lp->tx_skb = skb;
+
+ /* In ARET mode we need to go into STATE_TX_ARET_ON after we
+ * are in STATE_TX_ON. The pfad differs here, so we change
+ * the complete handler.
+ */
+ if (lp->tx_aret)
+ tx_complete = at86rf230_xmit_tx_on;
+
+ rc = at86rf230_async_state_change(lp, ctx, STATE_TX_ON,
+ tx_complete);
+ if (rc) {
+ at86rf230_async_error(lp, ctx, rc);
return rc;
+ }
+ rc = wait_for_completion_interruptible_timeout(&lp->tx_complete,
+ msecs_to_jiffies(lp->data->t_tx_timeout));
+ if (!rc) {
+ at86rf230_async_error(lp, ctx, rc);
+ return -ETIMEDOUT;
+ }
+
+ /* Interfame spacing time, which is phy depend.
+ * TODO
+ * Move this handling in MAC 802.15.4 layer.
+ * This is currently a workaround to avoid fragmenation issues.
+ */
+ if (skb->len > 18)
+ usleep_range(lp->data->t_lifs, lp->data->t_lifs + 10);
+ else
+ usleep_range(lp->data->t_sifs, lp->data->t_sifs + 10);
+
+ return 0;
+}
- return at86rf230_state(dev, STATE_RX_AACK_ON);
+static int
+at86rf230_ed(struct ieee802154_dev *dev, u8 *level)
+{
+ might_sleep();
+ BUG_ON(!level);
+ *level = 0xbe;
+ return 0;
+}
+
+static int
+at86rf230_start(struct ieee802154_dev *dev)
+{
+ return at86rf230_sync_state_change(dev->priv, STATE_RX_AACK_ON);
}
static void
at86rf230_stop(struct ieee802154_dev *dev)
{
- at86rf230_state(dev, STATE_FORCE_TRX_OFF);
+ at86rf230_sync_state_change(dev->priv, STATE_FORCE_TRX_OFF);
}
static int
-at86rf230_set_channel(struct at86rf230_local *lp, int page, int channel)
+at86rf23x_set_channel(struct at86rf230_local *lp, int page, int channel)
{
- lp->rssi_base_val = -91;
-
return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
}
if (page == 0) {
rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 0);
- lp->rssi_base_val = -100;
+ lp->data->rssi_base_val = -100;
} else {
rc = at86rf230_write_subreg(lp, SR_BPSK_QPSK, 1);
- lp->rssi_base_val = -98;
+ lp->data->rssi_base_val = -98;
}
if (rc < 0)
return rc;
return -EINVAL;
}
- if (is_rf212(lp))
- rc = at86rf212_set_channel(lp, page, channel);
- else
- rc = at86rf230_set_channel(lp, page, channel);
+ rc = lp->data->set_channel(lp, page, channel);
if (rc < 0)
return rc;
- msleep(1); /* Wait for PLL */
+ /* Wait for PLL */
+ usleep_range(lp->data->t_channel_switch,
+ lp->data->t_channel_switch + 10);
dev->phy->current_channel = channel;
dev->phy->current_page = page;
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_irqsave(&lp->lock, flags);
- if (lp->irq_busy) {
- spin_unlock_irqrestore(&lp->lock, flags);
- return -EBUSY;
- }
- spin_unlock_irqrestore(&lp->lock, flags);
-
- might_sleep();
-
- rc = at86rf230_state(dev, STATE_FORCE_TX_ON);
- if (rc)
- goto err;
-
- spin_lock_irqsave(&lp->lock, flags);
- lp->is_tx = 1;
- reinit_completion(&lp->tx_complete);
- spin_unlock_irqrestore(&lp->lock, flags);
-
- rc = at86rf230_write_fbuf(lp, skb->data, skb->len);
- if (rc)
- goto err_rx;
-
- if (lp->tx_aret) {
- rc = at86rf230_write_subreg(lp, SR_TRX_CMD, STATE_TX_ARET_ON);
- 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;
-
- return at86rf230_start(dev);
-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 int
at86rf230_set_hw_addr_filt(struct ieee802154_dev *dev,
struct ieee802154_hw_addr_filt *filt,
}
static int
-at86rf212_set_txpower(struct ieee802154_dev *dev, int db)
+at86rf230_set_txpower(struct ieee802154_dev *dev, int db)
{
struct at86rf230_local *lp = dev->priv;
}
static int
-at86rf212_set_lbt(struct ieee802154_dev *dev, bool on)
+at86rf230_set_lbt(struct ieee802154_dev *dev, bool on)
{
struct at86rf230_local *lp = dev->priv;
}
static int
-at86rf212_set_cca_mode(struct ieee802154_dev *dev, u8 mode)
+at86rf230_set_cca_mode(struct ieee802154_dev *dev, u8 mode)
{
struct at86rf230_local *lp = dev->priv;
}
static int
-at86rf212_set_cca_ed_level(struct ieee802154_dev *dev, s32 level)
+at86rf212_get_desens_steps(struct at86rf230_local *lp, s32 level)
+{
+ return (level - lp->data->rssi_base_val) * 100 / 207;
+}
+
+static int
+at86rf23x_get_desens_steps(struct at86rf230_local *lp, s32 level)
+{
+ return (level - lp->data->rssi_base_val) / 2;
+}
+
+static int
+at86rf230_set_cca_ed_level(struct ieee802154_dev *dev, s32 level)
{
struct at86rf230_local *lp = dev->priv;
- int desens_steps;
- if (level < lp->rssi_base_val || level > 30)
+ if (level < lp->data->rssi_base_val || level > 30)
return -EINVAL;
- desens_steps = (level - lp->rssi_base_val) * 100 / 207;
-
- return at86rf230_write_subreg(lp, SR_CCA_ED_THRES, desens_steps);
+ return at86rf230_write_subreg(lp, SR_CCA_ED_THRES,
+ lp->data->get_desense_steps(lp, level));
}
static int
-at86rf212_set_csma_params(struct ieee802154_dev *dev, u8 min_be, u8 max_be,
+at86rf230_set_csma_params(struct ieee802154_dev *dev, u8 min_be, u8 max_be,
u8 retries)
{
struct at86rf230_local *lp = dev->priv;
}
static int
-at86rf212_set_frame_retries(struct ieee802154_dev *dev, s8 retries)
+at86rf230_set_frame_retries(struct ieee802154_dev *dev, s8 retries)
{
struct at86rf230_local *lp = dev->priv;
int rc = 0;
.start = at86rf230_start,
.stop = at86rf230_stop,
.set_hw_addr_filt = at86rf230_set_hw_addr_filt,
+ .set_txpower = at86rf230_set_txpower,
+ .set_lbt = at86rf230_set_lbt,
+ .set_cca_mode = at86rf230_set_cca_mode,
+ .set_cca_ed_level = at86rf230_set_cca_ed_level,
+ .set_csma_params = at86rf230_set_csma_params,
+ .set_frame_retries = at86rf230_set_frame_retries,
};
-static struct ieee802154_ops at86rf212_ops = {
- .owner = THIS_MODULE,
- .xmit = at86rf230_xmit,
- .ed = at86rf230_ed,
- .set_channel = at86rf230_channel,
- .start = at86rf230_start,
- .stop = at86rf230_stop,
- .set_hw_addr_filt = at86rf230_set_hw_addr_filt,
- .set_txpower = at86rf212_set_txpower,
- .set_lbt = at86rf212_set_lbt,
- .set_cca_mode = at86rf212_set_cca_mode,
- .set_cca_ed_level = at86rf212_set_cca_ed_level,
- .set_csma_params = at86rf212_set_csma_params,
- .set_frame_retries = at86rf212_set_frame_retries,
+static struct at86rf2xx_chip_data at86rf233_data = {
+ .t_sleep_cycle = 330,
+ .t_channel_switch = 11,
+ .t_reset_to_off = 26,
+ .t_off_to_aack = 80,
+ .t_off_to_tx_on = 80,
+ .t_frame = 4096,
+ .t_p_ack = 545,
+ .t_sifs = 192,
+ .t_lifs = 480,
+ .t_tx_timeout = 2000,
+ .rssi_base_val = -91,
+ .set_channel = at86rf23x_set_channel,
+ .get_desense_steps = at86rf23x_get_desens_steps
};
-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) {
- 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);
- }
- }
-
- spin_lock_irqsave(&lp->lock, flags);
- lp->irq_busy = 0;
- spin_unlock_irqrestore(&lp->lock, flags);
-}
-
-static void at86rf230_irqwork_level(struct work_struct *work)
-{
- struct at86rf230_local *lp =
- container_of(work, struct at86rf230_local, irqwork);
-
- at86rf230_irqwork(work);
-
- enable_irq(lp->spi->irq);
-}
-
-static irqreturn_t at86rf230_isr(int irq, void *data)
-{
- struct at86rf230_local *lp = data;
- unsigned long flags;
-
- spin_lock_irqsave(&lp->lock, flags);
- lp->irq_busy = 1;
- spin_unlock_irqrestore(&lp->lock, flags);
-
- schedule_work(&lp->irqwork);
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t at86rf230_isr_level(int irq, void *data)
-{
- disable_irq_nosync(irq);
+static struct at86rf2xx_chip_data at86rf231_data = {
+ .t_sleep_cycle = 330,
+ .t_channel_switch = 24,
+ .t_reset_to_off = 37,
+ .t_off_to_aack = 110,
+ .t_off_to_tx_on = 110,
+ .t_frame = 4096,
+ .t_p_ack = 545,
+ .t_sifs = 192,
+ .t_lifs = 480,
+ .t_tx_timeout = 2000,
+ .rssi_base_val = -91,
+ .set_channel = at86rf23x_set_channel,
+ .get_desense_steps = at86rf23x_get_desens_steps
+};
- return at86rf230_isr(irq, data);
-}
+static struct at86rf2xx_chip_data at86rf212_data = {
+ .t_sleep_cycle = 330,
+ .t_channel_switch = 11,
+ .t_reset_to_off = 26,
+ .t_off_to_aack = 200,
+ .t_off_to_tx_on = 200,
+ .t_frame = 4096,
+ .t_p_ack = 545,
+ .t_sifs = 192,
+ .t_lifs = 480,
+ .t_tx_timeout = 2000,
+ .rssi_base_val = -100,
+ .set_channel = at86rf212_set_channel,
+ .get_desense_steps = at86rf212_get_desens_steps
+};
static int at86rf230_hw_init(struct at86rf230_local *lp)
{
- int rc, irq_pol, irq_type;
- u8 dvdd;
+ int rc, irq_type, irq_pol = IRQ_ACTIVE_HIGH;
+ unsigned int dvdd;
u8 csma_seed[2];
- rc = at86rf230_write_subreg(lp, SR_TRX_CMD, STATE_FORCE_TRX_OFF);
+ rc = at86rf230_sync_state_change(lp, STATE_FORCE_TRX_OFF);
if (rc)
return rc;
irq_type = irq_get_trigger_type(lp->spi->irq);
- /* configure irq polarity, defaults to high active */
- if (irq_type & (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW))
+ if (irq_type == IRQ_TYPE_EDGE_FALLING)
irq_pol = IRQ_ACTIVE_LOW;
- else
- irq_pol = IRQ_ACTIVE_HIGH;
rc = at86rf230_write_subreg(lp, SR_IRQ_POLARITY, irq_pol);
if (rc)
return rc;
+ rc = at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1);
+ if (rc)
+ return rc;
+
rc = at86rf230_write_subreg(lp, SR_IRQ_MASK, IRQ_TRX_END);
if (rc)
return rc;
if (rc)
return rc;
/* Wait the next SLEEP cycle */
- msleep(100);
+ usleep_range(lp->data->t_sleep_cycle,
+ lp->data->t_sleep_cycle + 100);
rc = at86rf230_read_subreg(lp, SR_DVDD_OK, &dvdd);
if (rc)
return pdata;
}
+static int
+at86rf230_detect_device(struct at86rf230_local *lp)
+{
+ unsigned int part, version, val;
+ u16 man_id = 0;
+ const char *chip;
+ int rc;
+
+ rc = __at86rf230_read(lp, RG_MAN_ID_0, &val);
+ if (rc)
+ return rc;
+ man_id |= val;
+
+ rc = __at86rf230_read(lp, RG_MAN_ID_1, &val);
+ if (rc)
+ return rc;
+ man_id |= (val << 8);
+
+ rc = __at86rf230_read(lp, RG_PART_NUM, &part);
+ if (rc)
+ return rc;
+
+ rc = __at86rf230_read(lp, RG_PART_NUM, &version);
+ if (rc)
+ return rc;
+
+ if (man_id != 0x001f) {
+ dev_err(&lp->spi->dev, "Non-Atmel dev found (MAN_ID %02x %02x)\n",
+ man_id >> 8, man_id & 0xFF);
+ return -EINVAL;
+ }
+
+ lp->dev->extra_tx_headroom = 0;
+ lp->dev->flags = IEEE802154_HW_OMIT_CKSUM | IEEE802154_HW_AACK |
+ IEEE802154_HW_TXPOWER | IEEE802154_HW_CSMA;
+
+ switch (part) {
+ case 2:
+ chip = "at86rf230";
+ rc = -ENOTSUPP;
+ break;
+ case 3:
+ chip = "at86rf231";
+ lp->data = &at86rf231_data;
+ lp->dev->phy->channels_supported[0] = 0x7FFF800;
+ break;
+ case 7:
+ chip = "at86rf212";
+ if (version == 1) {
+ lp->data = &at86rf212_data;
+ lp->dev->flags |= IEEE802154_HW_LBT;
+ lp->dev->phy->channels_supported[0] = 0x00007FF;
+ lp->dev->phy->channels_supported[2] = 0x00007FF;
+ } else {
+ rc = -ENOTSUPP;
+ }
+ break;
+ case 11:
+ chip = "at86rf233";
+ lp->data = &at86rf233_data;
+ lp->dev->phy->channels_supported[0] = 0x7FFF800;
+ break;
+ default:
+ chip = "unkown";
+ rc = -ENOTSUPP;
+ break;
+ }
+
+ dev_info(&lp->spi->dev, "Detected %s chip version %d\n", chip, version);
+
+ return rc;
+}
+
+static void
+at86rf230_setup_spi_messages(struct at86rf230_local *lp)
+{
+ lp->state.lp = lp;
+ spi_message_init(&lp->state.msg);
+ lp->state.msg.context = &lp->state;
+ lp->state.trx.tx_buf = lp->state.buf;
+ lp->state.trx.rx_buf = lp->state.buf;
+ spi_message_add_tail(&lp->state.trx, &lp->state.msg);
+
+ lp->irq.lp = lp;
+ spi_message_init(&lp->irq.msg);
+ lp->irq.msg.context = &lp->irq;
+ lp->irq.trx.tx_buf = lp->irq.buf;
+ lp->irq.trx.rx_buf = lp->irq.buf;
+ spi_message_add_tail(&lp->irq.trx, &lp->irq.msg);
+
+ lp->tx.lp = lp;
+ spi_message_init(&lp->tx.msg);
+ lp->tx.msg.context = &lp->tx;
+ lp->tx.trx.tx_buf = lp->tx.buf;
+ lp->tx.trx.rx_buf = lp->tx.buf;
+ spi_message_add_tail(&lp->tx.trx, &lp->tx.msg);
+}
+
static int at86rf230_probe(struct spi_device *spi)
{
struct at86rf230_platform_data *pdata;
struct ieee802154_dev *dev;
struct at86rf230_local *lp;
- u16 man_id = 0;
- u8 part = 0, version = 0, status;
- irq_handler_t irq_handler;
- work_func_t irq_worker;
+ unsigned int status;
int rc, irq_type;
- const char *chip;
- struct ieee802154_ops *ops = NULL;
if (!spi->irq) {
dev_err(&spi->dev, "no IRQ specified\n");
usleep_range(120, 240);
}
- rc = __at86rf230_detect_device(spi, &man_id, &part, &version);
- if (rc < 0)
- return rc;
-
- if (man_id != 0x001f) {
- dev_err(&spi->dev, "Non-Atmel dev found (MAN_ID %02x %02x)\n",
- man_id >> 8, man_id & 0xFF);
- return -EINVAL;
- }
-
- switch (part) {
- case 2:
- chip = "at86rf230";
- /* FIXME: should be easy to support; */
- break;
- case 3:
- chip = "at86rf231";
- ops = &at86rf230_ops;
- break;
- case 7:
- chip = "at86rf212";
- if (version == 1)
- ops = &at86rf212_ops;
- break;
- case 11:
- chip = "at86rf233";
- ops = &at86rf230_ops;
- break;
- default:
- chip = "UNKNOWN";
- break;
- }
-
- dev_info(&spi->dev, "Detected %s chip version %d\n", chip, version);
- if (!ops)
- return -ENOTSUPP;
-
- dev = ieee802154_alloc_device(sizeof(*lp), ops);
+ dev = ieee802154_alloc_device(sizeof(*lp), &at86rf230_ops);
if (!dev)
return -ENOMEM;
lp = dev->priv;
lp->dev = dev;
- lp->part = part;
- lp->vers = version;
-
lp->spi = spi;
-
dev->parent = &spi->dev;
- dev->extra_tx_headroom = 0;
- dev->flags = IEEE802154_HW_OMIT_CKSUM | IEEE802154_HW_AACK;
- irq_type = irq_get_trigger_type(spi->irq);
- if (!irq_type)
- irq_type = IRQF_TRIGGER_RISING;
- if (irq_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
- irq_worker = at86rf230_irqwork;
- irq_handler = at86rf230_isr;
- } else {
- irq_worker = at86rf230_irqwork_level;
- irq_handler = at86rf230_isr_level;
+ lp->regmap = devm_regmap_init_spi(spi, &at86rf230_regmap_spi_config);
+ if (IS_ERR(lp->regmap)) {
+ rc = PTR_ERR(lp->regmap);
+ dev_err(&spi->dev, "Failed to allocate register map: %d\n",
+ rc);
+ goto free_dev;
}
- mutex_init(&lp->bmux);
- INIT_WORK(&lp->irqwork, irq_worker);
+ at86rf230_setup_spi_messages(lp);
+
+ rc = at86rf230_detect_device(lp);
+ if (rc < 0)
+ goto free_dev;
+
spin_lock_init(&lp->lock);
init_completion(&lp->tx_complete);
+ init_completion(&lp->state_complete);
spi_set_drvdata(spi, lp);
- if (is_rf212(lp)) {
- dev->phy->channels_supported[0] = 0x00007FF;
- dev->phy->channels_supported[2] = 0x00007FF;
- } else {
- dev->phy->channels_supported[0] = 0x7FFF800;
- }
-
rc = at86rf230_hw_init(lp);
if (rc)
- goto err_hw_init;
+ goto free_dev;
/* Read irq status register to reset irq line */
rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0xff, 0, &status);
if (rc)
- goto err_hw_init;
+ goto free_dev;
+
+ irq_type = irq_get_trigger_type(spi->irq);
+ if (!irq_type)
+ irq_type = IRQF_TRIGGER_RISING;
- rc = devm_request_irq(&spi->dev, spi->irq, irq_handler,
- IRQF_SHARED | irq_type,
- dev_name(&spi->dev), lp);
+ rc = devm_request_irq(&spi->dev, spi->irq, at86rf230_isr,
+ IRQF_SHARED | irq_type, dev_name(&spi->dev), lp);
if (rc)
- goto err_hw_init;
+ goto free_dev;
rc = ieee802154_register_device(lp->dev);
if (rc)
- goto err_hw_init;
+ goto free_dev;
return rc;
-err_hw_init:
- flush_work(&lp->irqwork);
- mutex_destroy(&lp->bmux);
+free_dev:
ieee802154_free_device(lp->dev);
return rc;
/* mask all at86rf230 irq's */
at86rf230_write_subreg(lp, SR_IRQ_MASK, 0);
ieee802154_unregister_device(lp->dev);
- flush_work(&lp->irqwork);
- mutex_destroy(&lp->bmux);
ieee802154_free_device(lp->dev);
dev_dbg(&spi->dev, "unregistered at86rf230\n");
projects / cascardo / linux.git / blobdiff