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Date: Sat, 28 Jun 2014 20:33:40 +0200
From: Alexander Aring <alex.aring@...il.com>
To: alex.bluesman.smirnov@...il.com
Cc: dbaryshkov@...il.com, linux-zigbee-devel@...ts.sourceforge.net,
netdev@...r.kernel.org, werner@...esberger.net,
Alexander Aring <alex.aring@...il.com>
Subject: [PATCH net-next 02/13] at86rf230: add regmap support
This patch adds regmap support for the at86rf230 driver and drop the
lowlevel spi access functions and use the regmap access functions.
Signed-off-by: Alexander Aring <alex.aring@...il.com>
---
drivers/net/ieee802154/Kconfig | 1 +
drivers/net/ieee802154/at86rf230.c | 272 +++++++++++++++++++++++--------------
2 files changed, 168 insertions(+), 105 deletions(-)
diff --git a/drivers/net/ieee802154/Kconfig b/drivers/net/ieee802154/Kconfig
index 8b7ae51..391a916 100644
--- a/drivers/net/ieee802154/Kconfig
+++ b/drivers/net/ieee802154/Kconfig
@@ -34,6 +34,7 @@ config IEEE802154_AT86RF230
depends on IEEE802154_DRIVERS && MAC802154
tristate "AT86RF230/231/233/212 transceiver driver"
depends on SPI
+ select REGMAP_SPI
---help---
Say Y here to enable the at86rf230/231/233/212 SPI 802.15.4 wireless
controller.
diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c
index dca6bae..8784b8a 100644
--- a/drivers/net/ieee802154/at86rf230.c
+++ b/drivers/net/ieee802154/at86rf230.c
@@ -31,6 +31,7 @@
#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>
@@ -50,6 +51,7 @@ struct at86rf230_local {
struct completion tx_complete;
struct ieee802154_dev *dev;
+ struct regmap *regmap;
spinlock_t lock;
bool irq_busy;
@@ -256,6 +258,157 @@ static bool is_rf212(struct at86rf230_local *local)
#define STATE_BUSY_RX_AACK_NOCLK 0x1E
#define STATE_TRANSITION_IN_PROGRESS 0x1F
+#define AT86RF2XX_NUMREGS 0x3F
+
+static inline int
+__at86rf230_write(struct at86rf230_local *lp,
+ unsigned int addr, unsigned int data)
+{
+ return regmap_write(lp->regmap, addr, data);
+}
+
+static inline int
+__at86rf230_read(struct at86rf230_local *lp,
+ unsigned int addr, unsigned int *data)
+{
+ return regmap_read(lp->regmap, addr, data);
+}
+
+static inline int
+at86rf230_read_subreg(struct at86rf230_local *lp,
+ unsigned int addr, unsigned int mask,
+ unsigned int shift, unsigned int *data)
+{
+ int rc;
+
+ rc = __at86rf230_read(lp, addr, data);
+ if (rc > 0)
+ *data = (*data & mask) >> shift;
+
+ 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;
+ }
+}
+
+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;
+ }
+}
+
+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_NONE,
+ .max_register = AT86RF2XX_NUMREGS,
+ .writeable_reg = at86rf230_reg_writeable,
+ .readable_reg = at86rf230_reg_readable,
+ .volatile_reg = at86rf230_reg_volatile,
+ .precious_reg = at86rf230_reg_precious,
+};
+
static int
__at86rf230_detect_device(struct spi_device *spi, u16 *man_id, u8 *part,
u8 *version)
@@ -308,105 +461,6 @@ __at86rf230_detect_device(struct spi_device *spi, u16 *man_id, u8 *part,
}
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] & mask) >> shift;
-
- 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;
@@ -520,7 +574,7 @@ at86rf230_state(struct ieee802154_dev *dev, int state)
{
struct at86rf230_local *lp = dev->priv;
int rc;
- u8 val;
+ unsigned int val;
u8 desired_status;
might_sleep();
@@ -890,12 +944,11 @@ static void at86rf230_irqwork(struct work_struct *work)
{
struct at86rf230_local *lp =
container_of(work, struct at86rf230_local, irqwork);
- u8 status = 0, val;
+ unsigned int status;
int rc;
unsigned long flags;
- rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0xff, 0, &val);
- status |= val;
+ rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0xff, 0, &status);
status &= ~IRQ_PLL_LOCK; /* ignore */
status &= ~IRQ_RX_START; /* ignore */
@@ -954,7 +1007,7 @@ static irqreturn_t at86rf230_isr_level(int irq, void *data)
static int at86rf230_hw_init(struct at86rf230_local *lp)
{
int rc, irq_pol, irq_type;
- u8 dvdd;
+ unsigned int dvdd;
u8 csma_seed[2];
rc = at86rf230_write_subreg(lp, SR_TRX_CMD, STATE_FORCE_TRX_OFF);
@@ -1033,7 +1086,8 @@ static int at86rf230_probe(struct spi_device *spi)
struct ieee802154_dev *dev;
struct at86rf230_local *lp;
u16 man_id = 0;
- u8 part = 0, version = 0, status;
+ u8 part = 0, version = 0;
+ unsigned int status;
irq_handler_t irq_handler;
work_func_t irq_worker;
int rc, irq_type;
@@ -1128,6 +1182,14 @@ static int at86rf230_probe(struct spi_device *spi)
if (rc < 0)
goto free_dev;
+ 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;
+ }
+
irq_type = irq_get_trigger_type(spi->irq);
if (!irq_type)
irq_type = IRQF_TRIGGER_RISING;
--
2.0.1
--
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