102 static int hsi2c_wait_for_trx(struct exynos5_hsi2c *i2c)  in hsi2c_wait_for_trx()  argument
107 		u32 int_status = readl(&i2c->usi_int_stat);  in hsi2c_wait_for_trx()
110 			u32 trans_status = readl(&i2c->usi_trans_status);  in hsi2c_wait_for_trx()
113 			writel(int_status, &i2c->usi_int_stat);  in hsi2c_wait_for_trx()
226 	struct exynos5_hsi2c *i2c = i2c_bus->hsregs;  in exynos5_i2c_reset()  local
230 	i2c_ctl = readl(&i2c->usi_ctl);  in exynos5_i2c_reset()
232 	writel(i2c_ctl, &i2c->usi_ctl);  in exynos5_i2c_reset()
234 	i2c_ctl = readl(&i2c->usi_ctl);  in exynos5_i2c_reset()
236 	writel(i2c_ctl, &i2c->usi_ctl);  in exynos5_i2c_reset()
259 static unsigned hsi2c_poll_fifo(struct exynos5_hsi2c *i2c, bool rx_transfer)  in hsi2c_poll_fifo()  argument
264 	while (readl(&i2c->usi_fifo_stat) & fifo_bit) {  in hsi2c_poll_fifo()
265 		if (readl(&i2c->usi_int_stat) & HSI2C_INT_I2C_EN) {  in hsi2c_poll_fifo()
275 			    !(readl(&i2c->usi_fifo_stat) & fifo_bit))  in hsi2c_poll_fifo()
303 static int hsi2c_prepare_transaction(struct exynos5_hsi2c *i2c,  in hsi2c_prepare_transaction()  argument
317 	writel(readl(&i2c->usi_timeout) & ~HSI2C_TIMEOUT_EN, &i2c->usi_timeout);  in hsi2c_prepare_transaction()
320 	writel(HSI2C_SLV_ADDR_MAS(chip), &i2c->i2c_addr);  in hsi2c_prepare_transaction()
325 		       &i2c->usi_ctl);  in hsi2c_prepare_transaction()
328 		writel(conf | HSI2C_READ_WRITE, &i2c->usi_auto_conf);  in hsi2c_prepare_transaction()
332 		       &i2c->usi_ctl);  in hsi2c_prepare_transaction()
335 		writel(conf, &i2c->usi_auto_conf);  in hsi2c_prepare_transaction()
339 	writel(HSI2C_INT_I2C_EN, &i2c->usi_int_stat);  in hsi2c_prepare_transaction()
347 static int hsi2c_wait_while_busy(struct exynos5_hsi2c *i2c)  in hsi2c_wait_while_busy()  argument
351 	while (readl(&i2c->usi_trans_status) & HSI2C_MASTER_BUSY) {  in hsi2c_wait_while_busy()
361 static int hsi2c_write(struct exynos5_hsi2c *i2c,  in hsi2c_write()  argument
378 		(i2c, chip, len + alen, false, issue_stop);  in hsi2c_write()
384 		rv = hsi2c_poll_fifo(i2c, false);  in hsi2c_write()
389 		writel(addr[i], &i2c->usi_txdata);  in hsi2c_write()
393 		rv = hsi2c_poll_fifo(i2c, false);  in hsi2c_write()
398 		writel(data[i], &i2c->usi_txdata);  in hsi2c_write()
401 	rv = hsi2c_wait_for_trx(i2c);  in hsi2c_write()
405 		int tmp_ret = hsi2c_wait_while_busy(i2c);  in hsi2c_write()
410 	writel(HSI2C_FUNC_MODE_I2C, &i2c->usi_ctl); /* done */  in hsi2c_write()
414 static int hsi2c_read(struct exynos5_hsi2c *i2c,  in hsi2c_read()  argument
433 		rv = hsi2c_write(i2c, chip, addr, alen, NULL, 0, false);  in hsi2c_read()
438 	rv = hsi2c_prepare_transaction(i2c, chip, len, true, true);  in hsi2c_read()
444 		rv = hsi2c_poll_fifo(i2c, true);  in hsi2c_read()
449 		data[i] = readl(&i2c->usi_rxdata);  in hsi2c_read()
452 	rv = hsi2c_wait_for_trx(i2c);  in hsi2c_read()
455 	tmp_ret = hsi2c_wait_while_busy(i2c);  in hsi2c_read()
459 	writel(HSI2C_FUNC_MODE_I2C, &i2c->usi_ctl); /* done */  in hsi2c_read()