diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-s3c2410.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-s3c2410.c | 88 |
1 files changed, 44 insertions, 44 deletions
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c index 1fac4e2..f5efece 100644 --- a/drivers/i2c/busses/i2c-s3c2410.c +++ b/drivers/i2c/busses/i2c-s3c2410.c @@ -109,7 +109,8 @@ static inline int s3c24xx_i2c_is2440(struct s3c24xx_i2c *i2c) * the default if there is none */ -static inline struct s3c2410_platform_i2c *s3c24xx_i2c_get_platformdata(struct device *dev) +static inline struct s3c2410_platform_i2c * +s3c24xx_i2c_get_platformdata(struct device *dev) { if (dev->platform_data != NULL) return (struct s3c2410_platform_i2c *)dev->platform_data; @@ -129,7 +130,7 @@ static inline void s3c24xx_i2c_master_complete(struct s3c24xx_i2c *i2c, int ret) i2c->msg_ptr = 0; i2c->msg = NULL; - i2c->msg_idx ++; + i2c->msg_idx++; i2c->msg_num = 0; if (ret) i2c->msg_idx = ret; @@ -140,19 +141,17 @@ static inline void s3c24xx_i2c_master_complete(struct s3c24xx_i2c *i2c, int ret) static inline void s3c24xx_i2c_disable_ack(struct s3c24xx_i2c *i2c) { unsigned long tmp; - + tmp = readl(i2c->regs + S3C2410_IICCON); writel(tmp & ~S3C2410_IICCON_ACKEN, i2c->regs + S3C2410_IICCON); - } static inline void s3c24xx_i2c_enable_ack(struct s3c24xx_i2c *i2c) { unsigned long tmp; - + tmp = readl(i2c->regs + S3C2410_IICCON); writel(tmp | S3C2410_IICCON_ACKEN, i2c->regs + S3C2410_IICCON); - } /* irq enable/disable functions */ @@ -160,7 +159,7 @@ static inline void s3c24xx_i2c_enable_ack(struct s3c24xx_i2c *i2c) static inline void s3c24xx_i2c_disable_irq(struct s3c24xx_i2c *i2c) { unsigned long tmp; - + tmp = readl(i2c->regs + S3C2410_IICCON); writel(tmp & ~S3C2410_IICCON_IRQEN, i2c->regs + S3C2410_IICCON); } @@ -168,7 +167,7 @@ static inline void s3c24xx_i2c_disable_irq(struct s3c24xx_i2c *i2c) static inline void s3c24xx_i2c_enable_irq(struct s3c24xx_i2c *i2c) { unsigned long tmp; - + tmp = readl(i2c->regs + S3C2410_IICCON); writel(tmp | S3C2410_IICCON_IRQEN, i2c->regs + S3C2410_IICCON); } @@ -176,10 +175,10 @@ static inline void s3c24xx_i2c_enable_irq(struct s3c24xx_i2c *i2c) /* s3c24xx_i2c_message_start * - * put the start of a message onto the bus + * put the start of a message onto the bus */ -static void s3c24xx_i2c_message_start(struct s3c24xx_i2c *i2c, +static void s3c24xx_i2c_message_start(struct s3c24xx_i2c *i2c, struct i2c_msg *msg) { unsigned int addr = (msg->addr & 0x7f) << 1; @@ -198,15 +197,15 @@ static void s3c24xx_i2c_message_start(struct s3c24xx_i2c *i2c, if (msg->flags & I2C_M_REV_DIR_ADDR) addr ^= 1; - // todo - check for wether ack wanted or not + /* todo - check for wether ack wanted or not */ s3c24xx_i2c_enable_ack(i2c); iiccon = readl(i2c->regs + S3C2410_IICCON); writel(stat, i2c->regs + S3C2410_IICSTAT); - + dev_dbg(i2c->dev, "START: %08lx to IICSTAT, %02x to DS\n", stat, addr); writeb(addr, i2c->regs + S3C2410_IICDS); - + /* delay here to ensure the data byte has gotten onto the bus * before the transaction is started */ @@ -214,8 +213,8 @@ static void s3c24xx_i2c_message_start(struct s3c24xx_i2c *i2c, dev_dbg(i2c->dev, "iiccon, %08lx\n", iiccon); writel(iiccon, i2c->regs + S3C2410_IICCON); - - stat |= S3C2410_IICSTAT_START; + + stat |= S3C2410_IICSTAT_START; writel(stat, i2c->regs + S3C2410_IICSTAT); } @@ -226,11 +225,11 @@ static inline void s3c24xx_i2c_stop(struct s3c24xx_i2c *i2c, int ret) dev_dbg(i2c->dev, "STOP\n"); /* stop the transfer */ - iicstat &= ~ S3C2410_IICSTAT_START; + iicstat &= ~S3C2410_IICSTAT_START; writel(iicstat, i2c->regs + S3C2410_IICSTAT); - + i2c->state = STATE_STOP; - + s3c24xx_i2c_master_complete(i2c, ret); s3c24xx_i2c_disable_irq(i2c); } @@ -240,7 +239,7 @@ static inline void s3c24xx_i2c_stop(struct s3c24xx_i2c *i2c, int ret) /* is_lastmsg() * - * returns TRUE if the current message is the last in the set + * returns TRUE if the current message is the last in the set */ static inline int is_lastmsg(struct s3c24xx_i2c *i2c) @@ -288,14 +287,14 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat) case STATE_STOP: dev_err(i2c->dev, "%s: called in STATE_STOP\n", __func__); - s3c24xx_i2c_disable_irq(i2c); + s3c24xx_i2c_disable_irq(i2c); goto out_ack; case STATE_START: /* last thing we did was send a start condition on the * bus, or started a new i2c message */ - + if (iicstat & S3C2410_IICSTAT_LASTBIT && !(i2c->msg->flags & I2C_M_IGNORE_NAK)) { /* ack was not received... */ @@ -321,7 +320,7 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat) if (i2c->state == STATE_READ) goto prepare_read; - /* fall through to the write state, as we will need to + /* fall through to the write state, as we will need to * send a byte as well */ case STATE_WRITE: @@ -338,7 +337,7 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat) } } - retry_write: + retry_write: if (!is_msgend(i2c)) { byte = i2c->msg->buf[i2c->msg_ptr++]; @@ -358,9 +357,9 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat) dev_dbg(i2c->dev, "WRITE: Next Message\n"); i2c->msg_ptr = 0; - i2c->msg_idx ++; + i2c->msg_idx++; i2c->msg++; - + /* check to see if we need to do another message */ if (i2c->msg->flags & I2C_M_NOSTART) { @@ -374,7 +373,6 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat) goto retry_write; } else { - /* send the new start */ s3c24xx_i2c_message_start(i2c, i2c->msg); i2c->state = STATE_START; @@ -388,7 +386,7 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat) break; case STATE_READ: - /* we have a byte of data in the data register, do + /* we have a byte of data in the data register, do * something with it, and then work out wether we are * going to do any more read/write */ @@ -396,13 +394,13 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat) byte = readb(i2c->regs + S3C2410_IICDS); i2c->msg->buf[i2c->msg_ptr++] = byte; - prepare_read: + prepare_read: if (is_msglast(i2c)) { /* last byte of buffer */ if (is_lastmsg(i2c)) s3c24xx_i2c_disable_ack(i2c); - + } else if (is_msgend(i2c)) { /* ok, we've read the entire buffer, see if there * is anything else we need to do */ @@ -428,7 +426,7 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat) /* acknowlegde the IRQ and get back on with the work */ out_ack: - tmp = readl(i2c->regs + S3C2410_IICCON); + tmp = readl(i2c->regs + S3C2410_IICCON); tmp &= ~S3C2410_IICCON_IRQPEND; writel(tmp, i2c->regs + S3C2410_IICCON); out: @@ -449,19 +447,19 @@ static irqreturn_t s3c24xx_i2c_irq(int irqno, void *dev_id) status = readl(i2c->regs + S3C2410_IICSTAT); if (status & S3C2410_IICSTAT_ARBITR) { - // deal with arbitration loss + /* deal with arbitration loss */ dev_err(i2c->dev, "deal with arbitration loss\n"); } if (i2c->state == STATE_IDLE) { dev_dbg(i2c->dev, "IRQ: error i2c->state == IDLE\n"); - tmp = readl(i2c->regs + S3C2410_IICCON); + tmp = readl(i2c->regs + S3C2410_IICCON); tmp &= ~S3C2410_IICCON_IRQPEND; writel(tmp, i2c->regs + S3C2410_IICCON); goto out; } - + /* pretty much this leaves us with the fact that we've * transmitted or received whatever byte we last sent */ @@ -484,7 +482,7 @@ static int s3c24xx_i2c_set_master(struct s3c24xx_i2c *i2c) while (timeout-- > 0) { iicstat = readl(i2c->regs + S3C2410_IICSTAT); - + if (!(iicstat & S3C2410_IICSTAT_BUSBUSY)) return 0; @@ -502,7 +500,8 @@ static int s3c24xx_i2c_set_master(struct s3c24xx_i2c *i2c) * this starts an i2c transfer */ -static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, struct i2c_msg *msgs, int num) +static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, + struct i2c_msg *msgs, int num) { unsigned long timeout; int ret; @@ -528,12 +527,12 @@ static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, struct i2c_msg *msgs, int s3c24xx_i2c_enable_irq(i2c); s3c24xx_i2c_message_start(i2c, msgs); spin_unlock_irq(&i2c->lock); - + timeout = wait_event_timeout(i2c->wait, i2c->msg_num == 0, HZ * 5); ret = i2c->msg_idx; - /* having these next two as dev_err() makes life very + /* having these next two as dev_err() makes life very * noisy when doing an i2cdetect */ if (timeout == 0) @@ -642,7 +641,7 @@ static inline int freq_acceptable(unsigned int freq, unsigned int wanted) { int diff = freq - wanted; - return (diff >= -2 && diff <= 2); + return diff >= -2 && diff <= 2; } /* s3c24xx_i2c_clockrate @@ -665,7 +664,7 @@ static int s3c24xx_i2c_clockrate(struct s3c24xx_i2c *i2c, unsigned int *got) pdata = s3c24xx_i2c_get_platformdata(i2c->adap.dev.parent); clkin /= 1000; /* clkin now in KHz */ - + dev_dbg(i2c->dev, "pdata %p, freq %lu %lu..%lu\n", pdata, pdata->bus_freq, pdata->min_freq, pdata->max_freq); @@ -773,7 +772,7 @@ static inline void s3c24xx_i2c_deregister_cpufreq(struct s3c24xx_i2c *i2c) /* s3c24xx_i2c_init * - * initialise the controller, set the IO lines and frequency + * initialise the controller, set the IO lines and frequency */ static int s3c24xx_i2c_init(struct s3c24xx_i2c *i2c) @@ -792,7 +791,7 @@ static int s3c24xx_i2c_init(struct s3c24xx_i2c *i2c) s3c2410_gpio_cfgpin(S3C2410_GPE14, S3C2410_GPE14_IICSCL); /* write slave address */ - + writeb(pdata->slave_addr, i2c->regs + S3C2410_IICADD); dev_info(i2c->dev, "slave address 0x%02x\n", pdata->slave_addr); @@ -877,7 +876,8 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) goto err_ioarea; } - dev_dbg(&pdev->dev, "registers %p (%p, %p)\n", i2c->regs, i2c->ioarea, res); + dev_dbg(&pdev->dev, "registers %p (%p, %p)\n", + i2c->regs, i2c->ioarea, res); /* setup info block for the i2c core */ @@ -891,7 +891,7 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) goto err_iomap; /* find the IRQ for this unit (note, this relies on the init call to - * ensure no current IRQs pending + * ensure no current IRQs pending */ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); @@ -910,7 +910,7 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) } i2c->irq = res; - + dev_dbg(&pdev->dev, "irq resource %p (%lu)\n", res, (unsigned long)res->start); |
