From ec2c81c5d4681274f9f9d079b08ed259ff20dc69 Mon Sep 17 00:00:00 2001 From: "mario.six@gdsys.cc" Date: Mon, 25 Apr 2016 08:31:01 +0200 Subject: dm: fsl_i2c: Rename I2C register structure Signed-off-by: Mario Six --- drivers/i2c/fsl_i2c.c | 123 +++++++++++++++++++++++++++----------------------- 1 file changed, 66 insertions(+), 57 deletions(-) (limited to 'drivers/i2c') diff --git a/drivers/i2c/fsl_i2c.c b/drivers/i2c/fsl_i2c.c index b56a1c2541..70c7cbab57 100644 --- a/drivers/i2c/fsl_i2c.c +++ b/drivers/i2c/fsl_i2c.c @@ -34,16 +34,16 @@ DECLARE_GLOBAL_DATA_PTR; -static const struct fsl_i2c *i2c_dev[4] = { - (struct fsl_i2c *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C_OFFSET), +static const struct fsl_i2c_base *i2c_base[4] = { + (struct fsl_i2c_base *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C_OFFSET), #ifdef CONFIG_SYS_FSL_I2C2_OFFSET - (struct fsl_i2c *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C2_OFFSET), + (struct fsl_i2c_base *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C2_OFFSET), #endif #ifdef CONFIG_SYS_FSL_I2C3_OFFSET - (struct fsl_i2c *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C3_OFFSET), + (struct fsl_i2c_base *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C3_OFFSET), #endif #ifdef CONFIG_SYS_FSL_I2C4_OFFSET - (struct fsl_i2c *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C4_OFFSET) + (struct fsl_i2c_base *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C4_OFFSET) #endif }; @@ -104,7 +104,7 @@ static const struct { /** * Set the I2C bus speed for a given I2C device * - * @param dev: the I2C device + * @param base: the I2C device registers * @i2c_clk: I2C bus clock frequency * @speed: the desired speed of the bus * @@ -112,7 +112,7 @@ static const struct { * * The return value is the actual bus speed that is set. */ -static unsigned int set_i2c_bus_speed(const struct fsl_i2c *dev, +static unsigned int set_i2c_bus_speed(const struct fsl_i2c_base *base, unsigned int i2c_clk, unsigned int speed) { unsigned short divider = min(i2c_clk / speed, (unsigned int)USHRT_MAX); @@ -173,8 +173,8 @@ static unsigned int set_i2c_bus_speed(const struct fsl_i2c *dev, debug("divider:%d, est_div:%ld, DFSR:%d\n", divider, est_div, dfsr); debug("FDR:0x%.2x, speed:%d\n", fdr, speed); #endif - writeb(dfsr, &dev->dfsrr); /* set default filter */ - writeb(fdr, &dev->fdr); /* set bus speed */ + writeb(dfsr, &base->dfsrr); /* set default filter */ + writeb(fdr, &base->fdr); /* set bus speed */ #else unsigned int i; @@ -184,7 +184,7 @@ static unsigned int set_i2c_bus_speed(const struct fsl_i2c *dev, fdr = fsl_i2c_speed_map[i].fdr; speed = i2c_clk / fsl_i2c_speed_map[i].divider; - writeb(fdr, &dev->fdr); /* set bus speed */ + writeb(fdr, &base->fdr); /* set bus speed */ break; } @@ -200,7 +200,7 @@ static unsigned int get_i2c_clock(int bus) return gd->arch.i2c1_clk; /* I2C1 clock */ } -static int fsl_i2c_fixup(const struct fsl_i2c *dev) +static int fsl_i2c_fixup(const struct fsl_i2c_base *base) { const unsigned long long timeout = usec2ticks(CONFIG_I2C_MBB_TIMEOUT); unsigned long long timeval = 0; @@ -214,34 +214,34 @@ static int fsl_i2c_fixup(const struct fsl_i2c *dev) flags = I2C_CR_BIT6; #endif - writeb(I2C_CR_MEN | I2C_CR_MSTA, &dev->cr); + writeb(I2C_CR_MEN | I2C_CR_MSTA, &base->cr); timeval = get_ticks(); - while (!(readb(&dev->sr) & I2C_SR_MBB)) { + while (!(readb(&base->sr) & I2C_SR_MBB)) { if ((get_ticks() - timeval) > timeout) goto err; } - if (readb(&dev->sr) & I2C_SR_MAL) { + if (readb(&base->sr) & I2C_SR_MAL) { /* SDA is stuck low */ - writeb(0, &dev->cr); + writeb(0, &base->cr); udelay(100); - writeb(I2C_CR_MSTA | flags, &dev->cr); - writeb(I2C_CR_MEN | I2C_CR_MSTA | flags, &dev->cr); + writeb(I2C_CR_MSTA | flags, &base->cr); + writeb(I2C_CR_MEN | I2C_CR_MSTA | flags, &base->cr); } - readb(&dev->dr); + readb(&base->dr); timeval = get_ticks(); - while (!(readb(&dev->sr) & I2C_SR_MIF)) { + while (!(readb(&base->sr) & I2C_SR_MIF)) { if ((get_ticks() - timeval) > timeout) goto err; } ret = 0; err: - writeb(I2C_CR_MEN | flags, &dev->cr); - writeb(0, &dev->sr); + writeb(I2C_CR_MEN | flags, &base->cr); + writeb(0, &base->sr); udelay(100); return ret; @@ -249,7 +249,7 @@ err: static void fsl_i2c_init(struct i2c_adapter *adap, int speed, int slaveadd) { - const struct fsl_i2c *dev; + const struct fsl_i2c_base *base; const unsigned long long timeout = usec2ticks(CONFIG_I2C_MBB_TIMEOUT); unsigned long long timeval; @@ -260,21 +260,21 @@ static void fsl_i2c_init(struct i2c_adapter *adap, int speed, int slaveadd) */ i2c_init_board(); #endif - dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr]; + base = (struct fsl_i2c_base *)i2c_base[adap->hwadapnr]; - writeb(0, &dev->cr); /* stop I2C controller */ + writeb(0, &base->cr); /* stop I2C controller */ udelay(5); /* let it shutdown in peace */ - set_i2c_bus_speed(dev, get_i2c_clock(adap->hwadapnr), speed); - writeb(slaveadd << 1, &dev->adr);/* write slave address */ - writeb(0x0, &dev->sr); /* clear status register */ - writeb(I2C_CR_MEN, &dev->cr); /* start I2C controller */ + set_i2c_bus_speed(base, get_i2c_clock(adap->hwadapnr), speed); + writeb(slaveadd << 1, &base->adr);/* write slave address */ + writeb(0x0, &base->sr); /* clear status register */ + writeb(I2C_CR_MEN, &base->cr); /* start I2C controller */ timeval = get_ticks(); - while (readb(&dev->sr) & I2C_SR_MBB) { + while (readb(&base->sr) & I2C_SR_MBB) { if ((get_ticks() - timeval) < timeout) continue; - if (fsl_i2c_fixup(dev)) + if (fsl_i2c_fixup(base)) debug("i2c_init: BUS#%d failed to init\n", adap->hwadapnr); @@ -294,11 +294,12 @@ static void fsl_i2c_init(struct i2c_adapter *adap, int speed, int slaveadd) static int i2c_wait4bus(struct i2c_adapter *adap) { - struct fsl_i2c *dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr]; + struct fsl_i2c_base *base = + (struct fsl_i2c_base *)i2c_base[adap->hwadapnr]; unsigned long long timeval = get_ticks(); const unsigned long long timeout = usec2ticks(CONFIG_I2C_MBB_TIMEOUT); - while (readb(&dev->sr) & I2C_SR_MBB) { + while (readb(&base->sr) & I2C_SR_MBB) { if ((get_ticks() - timeval) > timeout) return -1; } @@ -312,16 +313,17 @@ i2c_wait(struct i2c_adapter *adap, int write) u32 csr; unsigned long long timeval = get_ticks(); const unsigned long long timeout = usec2ticks(CONFIG_I2C_TIMEOUT); - struct fsl_i2c *dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr]; + struct fsl_i2c_base *base = + (struct fsl_i2c_base *)i2c_base[adap->hwadapnr]; do { - csr = readb(&dev->sr); + csr = readb(&base->sr); if (!(csr & I2C_SR_MIF)) continue; /* Read again to allow register to stabilise */ - csr = readb(&dev->sr); + csr = readb(&base->sr); - writeb(0x0, &dev->sr); + writeb(0x0, &base->sr); if (csr & I2C_SR_MAL) { debug("i2c_wait: MAL\n"); @@ -348,13 +350,14 @@ i2c_wait(struct i2c_adapter *adap, int write) static __inline__ int i2c_write_addr(struct i2c_adapter *adap, u8 dev, u8 dir, int rsta) { - struct fsl_i2c *device = (struct fsl_i2c *)i2c_dev[adap->hwadapnr]; + struct fsl_i2c_base *base = + (struct fsl_i2c_base *)i2c_base[adap->hwadapnr]; writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_MTX | (rsta ? I2C_CR_RSTA : 0), - &device->cr); + &base->cr); - writeb((dev << 1) | dir, &device->dr); + writeb((dev << 1) | dir, &base->dr); if (i2c_wait(adap, I2C_WRITE_BIT) < 0) return 0; @@ -365,11 +368,12 @@ i2c_write_addr(struct i2c_adapter *adap, u8 dev, u8 dir, int rsta) static __inline__ int __i2c_write(struct i2c_adapter *adap, u8 *data, int length) { - struct fsl_i2c *dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr]; + struct fsl_i2c_base *base = + (struct fsl_i2c_base *)i2c_base[adap->hwadapnr]; int i; for (i = 0; i < length; i++) { - writeb(data[i], &dev->dr); + writeb(data[i], &base->dr); if (i2c_wait(adap, I2C_WRITE_BIT) < 0) break; @@ -381,14 +385,15 @@ __i2c_write(struct i2c_adapter *adap, u8 *data, int length) static __inline__ int __i2c_read(struct i2c_adapter *adap, u8 *data, int length) { - struct fsl_i2c *dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr]; + struct fsl_i2c_base *base = + (struct fsl_i2c_base *)i2c_base[adap->hwadapnr]; int i; writeb(I2C_CR_MEN | I2C_CR_MSTA | ((length == 1) ? I2C_CR_TXAK : 0), - &dev->cr); + &base->cr); /* dummy read */ - readb(&dev->dr); + readb(&base->dr); for (i = 0; i < length; i++) { if (i2c_wait(adap, I2C_READ_BIT) < 0) @@ -397,14 +402,14 @@ __i2c_read(struct i2c_adapter *adap, u8 *data, int length) /* Generate ack on last next to last byte */ if (i == length - 2) writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_TXAK, - &dev->cr); + &base->cr); /* Do not generate stop on last byte */ if (i == length - 1) writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_MTX, - &dev->cr); + &base->cr); - data[i] = readb(&dev->dr); + data[i] = readb(&base->dr); } return i; @@ -414,7 +419,8 @@ static int fsl_i2c_read(struct i2c_adapter *adap, u8 dev, uint addr, int alen, u8 *data, int length) { - struct fsl_i2c *device = (struct fsl_i2c *)i2c_dev[adap->hwadapnr]; + struct fsl_i2c_base *base = + (struct fsl_i2c_base *)i2c_base[adap->hwadapnr]; int i = -1; /* signal error */ u8 *a = (u8*)&addr; int len = alen * -1; @@ -457,7 +463,7 @@ fsl_i2c_read(struct i2c_adapter *adap, u8 dev, uint addr, int alen, u8 *data, i = __i2c_read(adap, data, length); } - writeb(I2C_CR_MEN, &device->cr); + writeb(I2C_CR_MEN, &base->cr); if (i2c_wait4bus(adap)) /* Wait until STOP */ debug("i2c_read: wait4bus timed out\n"); @@ -472,7 +478,8 @@ static int fsl_i2c_write(struct i2c_adapter *adap, u8 dev, uint addr, int alen, u8 *data, int length) { - struct fsl_i2c *device = (struct fsl_i2c *)i2c_dev[adap->hwadapnr]; + struct fsl_i2c_base *base = + (struct fsl_i2c_base *)i2c_base[adap->hwadapnr]; int i = -1; /* signal error */ u8 *a = (u8*)&addr; @@ -484,7 +491,7 @@ fsl_i2c_write(struct i2c_adapter *adap, u8 dev, uint addr, int alen, i = __i2c_write(adap, data, length); } - writeb(I2C_CR_MEN, &device->cr); + writeb(I2C_CR_MEN, &base->cr); if (i2c_wait4bus(adap)) /* Wait until STOP */ debug("i2c_write: wait4bus timed out\n"); @@ -497,12 +504,13 @@ fsl_i2c_write(struct i2c_adapter *adap, u8 dev, uint addr, int alen, static int fsl_i2c_probe(struct i2c_adapter *adap, uchar chip) { - struct fsl_i2c *dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr]; + struct fsl_i2c_base *base = + (struct fsl_i2c_base *)i2c_base[adap->hwadapnr]; /* For unknow reason the controller will ACK when * probing for a slave with the same address, so skip * it. */ - if (chip == (readb(&dev->adr) >> 1)) + if (chip == (readb(&base->adr) >> 1)) return -1; return fsl_i2c_read(adap, chip, 0, 0, NULL, 0); @@ -511,11 +519,12 @@ fsl_i2c_probe(struct i2c_adapter *adap, uchar chip) static unsigned int fsl_i2c_set_bus_speed(struct i2c_adapter *adap, unsigned int speed) { - struct fsl_i2c *dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr]; + struct fsl_i2c_base *base = + (struct fsl_i2c_base *)i2c_base[adap->hwadapnr]; - writeb(0, &dev->cr); /* stop controller */ - set_i2c_bus_speed(dev, get_i2c_clock(adap->hwadapnr), speed); - writeb(I2C_CR_MEN, &dev->cr); /* start controller */ + writeb(0, &base->cr); /* stop controller */ + set_i2c_bus_speed(base, get_i2c_clock(adap->hwadapnr), speed); + writeb(I2C_CR_MEN, &base->cr); /* start controller */ return 0; } -- cgit v1.2.1