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116 #include "xgbe-common.h"
141 	XI2C_IOWRITE_BITS(pdata, IC_ENABLE, EN, 1);  in xgbe_i2c_abort()
146 	while (wait--) {  in xgbe_i2c_abort()
153 	return (-EBUSY);  in xgbe_i2c_abort()
162 	while (wait--) {  in xgbe_i2c_set_enable()
163 		XI2C_IOWRITE_BITS(pdata, IC_ENABLE, EN, mode);  in xgbe_i2c_set_enable()
164 		if (XI2C_IOREAD_BITS(pdata, IC_ENABLE_STATUS, EN) == mode)  in xgbe_i2c_set_enable()
170 	return (-EBUSY);  in xgbe_i2c_set_enable()
222 	struct xgbe_i2c_op_state *state = &pdata->i2c.op_state;  in xgbe_i2c_write()
225 	/* Configured to never receive Rx overflows, so fill up Tx fifo */  in xgbe_i2c_write()
226 	tx_slots = pdata->i2c.tx_fifo_size - XI2C_IOREAD(pdata, IC_TXFLR);  in xgbe_i2c_write()
228 	    state->tx_len);  in xgbe_i2c_write()
230 	while (tx_slots && state->tx_len) {  in xgbe_i2c_write()
231 		if (state->op->cmd == XGBE_I2C_CMD_READ)  in xgbe_i2c_write()
234 			cmd = *state->tx_buf++;  in xgbe_i2c_write()
237 		    state->tx_len);  in xgbe_i2c_write()
239 		if (state->tx_len == 1)  in xgbe_i2c_write()
244 		tx_slots--;  in xgbe_i2c_write()
245 		state->tx_len--;  in xgbe_i2c_write()
249 	if (!state->tx_len)  in xgbe_i2c_write()
256 	struct xgbe_i2c_op_state *state = &pdata->i2c.op_state;  in xgbe_i2c_read()
260 	axgbe_printf(3, "%s: op cmd %d\n", __func__, state->op->cmd);  in xgbe_i2c_read()
261 	if (state->op->cmd != XGBE_I2C_CMD_READ)  in xgbe_i2c_read()
266 	    state->rx_len);  in xgbe_i2c_read()
268 	while (rx_slots && state->rx_len) {  in xgbe_i2c_read()
269 		*state->rx_buf++ = XI2C_IOREAD(pdata, IC_DATA_CMD);  in xgbe_i2c_read()
270 		state->rx_len--;  in xgbe_i2c_read()
271 		rx_slots--;  in xgbe_i2c_read()
278 	struct xgbe_i2c_op_state *state = &pdata->i2c.op_state;  in xgbe_i2c_clear_isr_interrupts()
281 		state->tx_abort_source = XI2C_IOREAD(pdata, IC_TX_ABRT_SOURCE);  in xgbe_i2c_clear_isr_interrupts()
293 	struct xgbe_i2c_op_state *state = &pdata->i2c.op_state;  in xgbe_i2c_isr()
307 		    "%#04x\n", __func__, state->tx_abort_source,  in xgbe_i2c_isr()
308 		    state->op->target);  in xgbe_i2c_isr()
312 		state->ret = -EIO;  in xgbe_i2c_isr()
316 	/* Check for data in the Rx fifo */  in xgbe_i2c_isr()
319 	/* Fill up the Tx fifo next */  in xgbe_i2c_isr()
324 	axgbe_printf(3, "%s: ret %d stop %d\n", __func__, state->ret,  in xgbe_i2c_isr()
327 	if (state->ret || XI2C_GET_BITS(isr, IC_RAW_INTR_STAT, STOP_DET))  in xgbe_i2c_isr()
328 		pdata->i2c_complete = true;  in xgbe_i2c_isr()
332 	if (pdata->vdata->irq_reissue_support)  in xgbe_i2c_isr()
353 	struct xgbe_i2c *i2c = &pdata->i2c;  in xgbe_i2c_get_features()
357 	i2c->max_speed_mode = XI2C_GET_BITS(reg, IC_COMP_PARAM_1,  in xgbe_i2c_get_features()
359 	i2c->rx_fifo_size = XI2C_GET_BITS(reg, IC_COMP_PARAM_1,  in xgbe_i2c_get_features()
361 	i2c->tx_fifo_size = XI2C_GET_BITS(reg, IC_COMP_PARAM_1,  in xgbe_i2c_get_features()
365 	    "MAX_SPEED_MODE", i2c->max_speed_mode,  in xgbe_i2c_get_features()
366 	    "RX_BUFFER_DEPTH", i2c->rx_fifo_size,  in xgbe_i2c_get_features()
367 	    "TX_BUFFER_DEPTH", i2c->tx_fifo_size);  in xgbe_i2c_get_features()
385 	struct xgbe_i2c_op_state *state = &pdata->i2c.op_state;  in xgbe_i2c_xfer()
389 	mtx_lock(&pdata->i2c_mutex);  in xgbe_i2c_xfer()
391 	axgbe_printf(3, "i2c xfer started ---->>>\n");  in xgbe_i2c_xfer()
399 	xgbe_i2c_set_target(pdata, op->target);  in xgbe_i2c_xfer()
402 	state->op = op;  in xgbe_i2c_xfer()
403 	state->tx_len = op->len;  in xgbe_i2c_xfer()
404 	state->tx_buf = op->buf;  in xgbe_i2c_xfer()
405 	state->rx_len = op->len;  in xgbe_i2c_xfer()
406 	state->rx_buf = op->buf;  in xgbe_i2c_xfer()
415 	/* Enabling the interrupts will cause the TX FIFO empty interrupt to  in xgbe_i2c_xfer()
423 		if (!pdata->i2c_complete) {  in xgbe_i2c_xfer()
432 	if ((ticks >= timeout) && !pdata->i2c_complete) {  in xgbe_i2c_xfer()
434 		ret = -ETIMEDOUT;  in xgbe_i2c_xfer()
438 	ret = state->ret;  in xgbe_i2c_xfer()
440 	    ret, state->tx_abort_source);  in xgbe_i2c_xfer()
443 		    ret, state->tx_abort_source);  in xgbe_i2c_xfer()
444 		if (state->tx_abort_source & IC_TX_ABRT_7B_ADDR_NOACK)  in xgbe_i2c_xfer()
445 			ret = -ENOTCONN;  in xgbe_i2c_xfer()
446 		else if (state->tx_abort_source & IC_TX_ABRT_ARB_LOST)  in xgbe_i2c_xfer()
447 			ret = -EAGAIN;  in xgbe_i2c_xfer()
450 	axgbe_printf(3, "i2c xfer finished ---->>>\n");  in xgbe_i2c_xfer()
453 	pdata->i2c_complete = false;  in xgbe_i2c_xfer()
458 	mtx_unlock(&pdata->i2c_mutex);  in xgbe_i2c_xfer()
465 	if (!pdata->i2c.started)  in xgbe_i2c_stop()
470 	pdata->i2c.started = 0;  in xgbe_i2c_stop()
480 	if (pdata->i2c.started)  in xgbe_i2c_start()
483 	pdata->i2c.started = 1;  in xgbe_i2c_start()
494 	mtx_init(&pdata->i2c_mutex, "xgbe i2c mutex lock", NULL, MTX_DEF);  in xgbe_i2c_init()
495 	pdata->i2c_complete = false;  in xgbe_i2c_init()
519 	i2c_if->i2c_init		= xgbe_i2c_init;  in xgbe_init_function_ptrs_i2c()
521 	i2c_if->i2c_start		= xgbe_i2c_start;  in xgbe_init_function_ptrs_i2c()
522 	i2c_if->i2c_stop		= xgbe_i2c_stop;  in xgbe_init_function_ptrs_i2c()
524 	i2c_if->i2c_xfer		= xgbe_i2c_xfer;  in xgbe_init_function_ptrs_i2c()
526 	i2c_if->i2c_isr			= xgbe_i2c_combined_isr;  in xgbe_init_function_ptrs_i2c()