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提交 0012e5c9 编写于 作者: M Marc Kleine-Budde
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can: flexcan: cleanup coding style and fix typos 

This patch fixes up the coding style to make checkpatch happier. Some typos are
also fixed.
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
上级 a1ef48e1
隐藏空白更改
内联 并排
Showing with 38 addition and 52 deletion
drivers/net/can/flexcan.c
浏览文件 @ 0012e5c9
......@@ -63,10 +63,10 @@
#define FLEXCAN_MCR_LPRIO_EN BIT(13)
#define FLEXCAN_MCR_AEN BIT(12)
#define FLEXCAN_MCR_MAXMB(x) ((x) & 0x7f)
#define FLEXCAN_MCR_IDAM_A (0 << 8)
#define FLEXCAN_MCR_IDAM_B (1 << 8)
#define FLEXCAN_MCR_IDAM_C (2 << 8)
#define FLEXCAN_MCR_IDAM_D (3 << 8)
#define FLEXCAN_MCR_IDAM_A (0x0 << 8)
#define FLEXCAN_MCR_IDAM_B (0x1 << 8)
#define FLEXCAN_MCR_IDAM_C (0x2 << 8)
#define FLEXCAN_MCR_IDAM_D (0x3 << 8)
/* FLEXCAN control register (CANCTRL) bits */
#define FLEXCAN_CTRL_PRESDIV(x) (((x) & 0xff) << 24)
......@@ -161,7 +161,7 @@
#define FLEXCAN_MB_CODE_RX_INACTIVE (0x0 << 24)
#define FLEXCAN_MB_CODE_RX_EMPTY (0x4 << 24)
#define FLEXCAN_MB_CODE_RX_FULL (0x2 << 24)
#define FLEXCAN_MB_CODE_RX_OVERRRUN (0x6 << 24)
#define FLEXCAN_MB_CODE_RX_OVERRUN (0x6 << 24)
#define FLEXCAN_MB_CODE_RX_RANSWER (0xa << 24)
#define FLEXCAN_MB_CODE_TX_INACTIVE (0x8 << 24)
......@@ -175,12 +175,9 @@
#define FLEXCAN_MB_CNT_LENGTH(x) (((x) & 0xf) << 16)
#define FLEXCAN_MB_CNT_TIMESTAMP(x) ((x) & 0xffff)
#define FLEXCAN_MB_CODE_MASK (0xf0ffffff)
#define FLEXCAN_TIMEOUT_US (50)
#define FLEXCAN_TIMEOUT_US (50)
/*
* FLEXCAN hardware feature flags
/* FLEXCAN hardware feature flags
*
* Below is some version info we got:
* SOC Version IP-Version Glitch- [TR]WRN_INT Memory err RTR re-
......@@ -236,7 +233,7 @@ struct flexcan_regs {
* 0x0e0...0x0ff 6-7 8 entry ID table
* (mx25, mx28, mx35, mx53)
* 0x0e0...0x2df 6-7..37 8..128 entry ID table
* size conf'ed via ctrl2::RFFN
* size conf'ed via ctrl2::RFFN
* (mx6, vf610)
*/
u32 _reserved4[408];
......@@ -272,10 +269,13 @@ struct flexcan_priv {
static struct flexcan_devtype_data fsl_p1010_devtype_data = {
.features = FLEXCAN_HAS_BROKEN_ERR_STATE,
};
static struct flexcan_devtype_data fsl_imx28_devtype_data;
static struct flexcan_devtype_data fsl_imx6q_devtype_data = {
.features = FLEXCAN_HAS_V10_FEATURES,
};
static struct flexcan_devtype_data fsl_vf610_devtype_data = {
.features = FLEXCAN_HAS_V10_FEATURES | FLEXCAN_HAS_MECR_FEATURES,
};
......@@ -292,11 +292,10 @@ static const struct can_bittiming_const flexcan_bittiming_const = {
.brp_inc = 1,
};
/*
* Abstract off the read/write for arm versus ppc. This
/* Abstract off the read/write for arm versus ppc. This
* assumes that PPC uses big-endian registers and everything
* else uses little-endian registers, independent of CPU
* endianess.
* endianness.
*/
#if defined(CONFIG_PPC)
static inline u32 flexcan_read(void __iomem *addr)
......@@ -434,7 +433,6 @@ static int flexcan_chip_softreset(struct flexcan_priv *priv)
return 0;
}
static int __flexcan_get_berr_counter(const struct net_device *dev,
struct can_berr_counter *bec)
{
......@@ -477,6 +475,7 @@ static int flexcan_start_xmit(struct sk_buff *skb, struct net_device *dev)
struct flexcan_regs __iomem *regs = priv->base;
struct can_frame *cf = (struct can_frame *)skb->data;
u32 can_id;
u32 data;
u32 ctrl = FLEXCAN_MB_CODE_TX_DATA | (cf->can_dlc << 16);
if (can_dropped_invalid_skb(dev, skb))
......@@ -495,11 +494,11 @@ static int flexcan_start_xmit(struct sk_buff *skb, struct net_device *dev)
ctrl |= FLEXCAN_MB_CNT_RTR;
if (cf->can_dlc > 0) {
u32 data = be32_to_cpup((__be32 *)&cf->data[0]);
data = be32_to_cpup((__be32 *)&cf->data[0]);
flexcan_write(data, &regs->cantxfg[FLEXCAN_TX_BUF_ID].data[0]);
}
if (cf->can_dlc > 3) {
u32 data = be32_to_cpup((__be32 *)&cf->data[4]);
data = be32_to_cpup((__be32 *)&cf->data[4]);
flexcan_write(data, &regs->cantxfg[FLEXCAN_TX_BUF_ID].data[1]);
}
......@@ -597,14 +596,14 @@ static int flexcan_poll_state(struct net_device *dev, u32 reg_esr)
flt = reg_esr & FLEXCAN_ESR_FLT_CONF_MASK;
if (likely(flt == FLEXCAN_ESR_FLT_CONF_ACTIVE)) {
tx_state = unlikely(reg_esr & FLEXCAN_ESR_TX_WRN) ?
CAN_STATE_ERROR_WARNING : CAN_STATE_ERROR_ACTIVE;
CAN_STATE_ERROR_WARNING : CAN_STATE_ERROR_ACTIVE;
rx_state = unlikely(reg_esr & FLEXCAN_ESR_RX_WRN) ?
CAN_STATE_ERROR_WARNING : CAN_STATE_ERROR_ACTIVE;
CAN_STATE_ERROR_WARNING : CAN_STATE_ERROR_ACTIVE;
new_state = max(tx_state, rx_state);
} else {
__flexcan_get_berr_counter(dev, &bec);
new_state = flt == FLEXCAN_ESR_FLT_CONF_PASSIVE ?
CAN_STATE_ERROR_PASSIVE : CAN_STATE_BUS_OFF;
CAN_STATE_ERROR_PASSIVE : CAN_STATE_BUS_OFF;
rx_state = bec.rxerr >= bec.txerr ? new_state : 0;
tx_state = bec.rxerr <= bec.txerr ? new_state : 0;
}
......@@ -687,8 +686,7 @@ static int flexcan_poll(struct napi_struct *napi, int quota)
u32 reg_iflag1, reg_esr;
int work_done = 0;
/*
* The error bits are cleared on read,
/* The error bits are cleared on read,
* use saved value from irq handler.
*/
reg_esr = flexcan_read(&regs->esr) | priv->reg_esr;
......@@ -728,12 +726,12 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id)
reg_iflag1 = flexcan_read(&regs->iflag1);
reg_esr = flexcan_read(&regs->esr);
/* ACK all bus error and state change IRQ sources */
if (reg_esr & FLEXCAN_ESR_ALL_INT)
flexcan_write(reg_esr & FLEXCAN_ESR_ALL_INT, &regs->esr);
/*
* schedule NAPI in case of:
/* schedule NAPI in case of:
* - rx IRQ
* - state change IRQ
* - bus error IRQ and bus error reporting is activated
......@@ -741,15 +739,14 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id)
if ((reg_iflag1 & FLEXCAN_IFLAG_RX_FIFO_AVAILABLE) ||
(reg_esr & FLEXCAN_ESR_ERR_STATE) ||
flexcan_has_and_handle_berr(priv, reg_esr)) {
/*
* The error bits are cleared on read,
/* The error bits are cleared on read,
* save them for later use.
*/
priv->reg_esr = reg_esr & FLEXCAN_ESR_ERR_BUS;
flexcan_write(FLEXCAN_IFLAG_DEFAULT &
~FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, &regs->imask1);
~FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, &regs->imask1);
flexcan_write(priv->reg_ctrl_default & ~FLEXCAN_CTRL_ERR_ALL,
&regs->ctrl);
&regs->ctrl);
napi_schedule(&priv->napi);
}
......@@ -765,7 +762,8 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id)
stats->tx_bytes += can_get_echo_skb(dev, 0);
stats->tx_packets++;
can_led_event(dev, CAN_LED_EVENT_TX);
/* after sending a RTR frame mailbox is in RX mode */
/* after sending a RTR frame MB is in RX mode */
flexcan_write(FLEXCAN_MB_CODE_TX_INACTIVE,
&regs->cantxfg[FLEXCAN_TX_BUF_ID].can_ctrl);
flexcan_write((1 << FLEXCAN_TX_BUF_ID), &regs->iflag1);
......@@ -813,8 +811,7 @@ static void flexcan_set_bittiming(struct net_device *dev)
flexcan_read(&regs->mcr), flexcan_read(&regs->ctrl));
}
/*
* flexcan_chip_start
/* flexcan_chip_start
*
* this functions is entered with clocks enabled
*
......@@ -838,8 +835,7 @@ static int flexcan_chip_start(struct net_device *dev)
flexcan_set_bittiming(dev);
/*
* MCR
/* MCR
*
* enable freeze
* enable fifo
......@@ -848,7 +844,6 @@ static int flexcan_chip_start(struct net_device *dev)
* enable warning int
* choose format C
* disable local echo
*
*/
reg_mcr = flexcan_read(&regs->mcr);
reg_mcr &= ~FLEXCAN_MCR_MAXMB(0xff);
......@@ -859,8 +854,7 @@ static int flexcan_chip_start(struct net_device *dev)
netdev_dbg(dev, "%s: writing mcr=0x%08x", __func__, reg_mcr);
flexcan_write(reg_mcr, &regs->mcr);
/*
* CTRL
/* CTRL
*
* disable timer sync feature
*
......@@ -875,8 +869,8 @@ static int flexcan_chip_start(struct net_device *dev)
reg_ctrl &= ~FLEXCAN_CTRL_TSYN;
reg_ctrl |= FLEXCAN_CTRL_BOFF_REC | FLEXCAN_CTRL_LBUF |
FLEXCAN_CTRL_ERR_STATE;
/*
* enable the "error interrupt" (FLEXCAN_CTRL_ERR_MSK),
/* enable the "error interrupt" (FLEXCAN_CTRL_ERR_MSK),
* on most Flexcan cores, too. Otherwise we don't get
* any error warning or passive interrupts.
*/
......@@ -913,16 +907,14 @@ static int flexcan_chip_start(struct net_device *dev)
if (priv->devtype_data->features & FLEXCAN_HAS_V10_FEATURES)
flexcan_write(0x0, &regs->rxfgmask);
/*
* On Vybrid, disable memory error detection interrupts
/* On Vybrid, disable memory error detection interrupts
* and freeze mode.
* This also works around errata e5295 which generates
* false positive memory errors and put the device in
* freeze mode.
*/
if (priv->devtype_data->features & FLEXCAN_HAS_MECR_FEATURES) {
/*
* Follow the protocol as described in "Detection
/* Follow the protocol as described in "Detection
* and Correction of Memory Errors" to write to
* MECR register
*/
......@@ -934,7 +926,7 @@ static int flexcan_chip_start(struct net_device *dev)
reg_mecr &= ~FLEXCAN_MECR_ECRWRDIS;
flexcan_write(reg_mecr, &regs->mecr);
reg_mecr &= ~(FLEXCAN_MECR_NCEFAFRZ | FLEXCAN_MECR_HANCEI_MSK |
FLEXCAN_MECR_FANCEI_MSK);
FLEXCAN_MECR_FANCEI_MSK);
flexcan_write(reg_mecr, &regs->mecr);
}
......@@ -965,11 +957,9 @@ static int flexcan_chip_start(struct net_device *dev)
return err;
}
/*
* flexcan_chip_stop
/* flexcan_chip_stop
*
* this functions is entered with clocks enabled
*
*/
static void flexcan_chip_stop(struct net_device *dev)
{
......@@ -987,8 +977,6 @@ static void flexcan_chip_stop(struct net_device *dev)
flexcan_transceiver_disable(priv);
priv->can.state = CAN_STATE_STOPPED;
return;
}
static int flexcan_open(struct net_device *dev)
......@@ -1114,8 +1102,7 @@ static int register_flexcandev(struct net_device *dev)
FLEXCAN_MCR_FEN | FLEXCAN_MCR_SUPV;
flexcan_write(reg, &regs->mcr);
/*
* Currently we only support newer versions of this core
/* Currently we only support newer versions of this core
* featuring a RX FIFO. Older cores found on some Coldfire
* derivates are not yet supported.
*/
......@@ -1180,7 +1167,7 @@ static int flexcan_probe(struct platform_device *pdev)
if (pdev->dev.of_node)
of_property_read_u32(pdev->dev.of_node,
"clock-frequency", &clock_freq);
"clock-frequency", &clock_freq);
if (!clock_freq) {
clk_ipg = devm_clk_get(&pdev->dev, "ipg");
......@@ -1237,7 +1224,6 @@ static int flexcan_probe(struct platform_device *pdev)
priv->clk_per = clk_per;
priv->pdata = dev_get_platdata(&pdev->dev);
priv->devtype_data = devtype_data;
priv->reg_xceiver = reg_xceiver;
netif_napi_add(dev, &priv->napi, flexcan_poll, FLEXCAN_NAPI_WEIGHT);
......
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