110 bfin_sport_spi_enable(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_enable()  argument
112 	bfin_write_or(&drv_data->regs->tcr1, TSPEN);  in bfin_sport_spi_enable()
113 	bfin_write_or(&drv_data->regs->rcr1, TSPEN);  in bfin_sport_spi_enable()
118 bfin_sport_spi_disable(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_disable()  argument
120 	bfin_write_and(&drv_data->regs->tcr1, ~TSPEN);  in bfin_sport_spi_disable()
121 	bfin_write_and(&drv_data->regs->rcr1, ~TSPEN);  in bfin_sport_spi_disable()
160 bfin_sport_spi_stat_poll_complete(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_stat_poll_complete()  argument
163 	while (!(bfin_read(&drv_data->regs->stat) & RXNE)) {  in bfin_sport_spi_stat_poll_complete()
170 bfin_sport_spi_u8_writer(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_u8_writer()  argument
174 	while (drv_data->tx < drv_data->tx_end) {  in bfin_sport_spi_u8_writer()
175 		bfin_write(&drv_data->regs->tx16, *drv_data->tx8++);  in bfin_sport_spi_u8_writer()
176 		bfin_sport_spi_stat_poll_complete(drv_data);  in bfin_sport_spi_u8_writer()
177 		dummy = bfin_read(&drv_data->regs->rx16);  in bfin_sport_spi_u8_writer()
182 bfin_sport_spi_u8_reader(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_u8_reader()  argument
184 	u16 tx_val = drv_data->cur_chip->idle_tx_val;  in bfin_sport_spi_u8_reader()
186 	while (drv_data->rx < drv_data->rx_end) {  in bfin_sport_spi_u8_reader()
187 		bfin_write(&drv_data->regs->tx16, tx_val);  in bfin_sport_spi_u8_reader()
188 		bfin_sport_spi_stat_poll_complete(drv_data);  in bfin_sport_spi_u8_reader()
189 		*drv_data->rx8++ = bfin_read(&drv_data->regs->rx16);  in bfin_sport_spi_u8_reader()
194 bfin_sport_spi_u8_duplex(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_u8_duplex()  argument
196 	while (drv_data->rx < drv_data->rx_end) {  in bfin_sport_spi_u8_duplex()
197 		bfin_write(&drv_data->regs->tx16, *drv_data->tx8++);  in bfin_sport_spi_u8_duplex()
198 		bfin_sport_spi_stat_poll_complete(drv_data);  in bfin_sport_spi_u8_duplex()
199 		*drv_data->rx8++ = bfin_read(&drv_data->regs->rx16);  in bfin_sport_spi_u8_duplex()
210 bfin_sport_spi_u16_writer(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_u16_writer()  argument
214 	while (drv_data->tx < drv_data->tx_end) {  in bfin_sport_spi_u16_writer()
215 		bfin_write(&drv_data->regs->tx16, *drv_data->tx16++);  in bfin_sport_spi_u16_writer()
216 		bfin_sport_spi_stat_poll_complete(drv_data);  in bfin_sport_spi_u16_writer()
217 		dummy = bfin_read(&drv_data->regs->rx16);  in bfin_sport_spi_u16_writer()
222 bfin_sport_spi_u16_reader(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_u16_reader()  argument
224 	u16 tx_val = drv_data->cur_chip->idle_tx_val;  in bfin_sport_spi_u16_reader()
226 	while (drv_data->rx < drv_data->rx_end) {  in bfin_sport_spi_u16_reader()
227 		bfin_write(&drv_data->regs->tx16, tx_val);  in bfin_sport_spi_u16_reader()
228 		bfin_sport_spi_stat_poll_complete(drv_data);  in bfin_sport_spi_u16_reader()
229 		*drv_data->rx16++ = bfin_read(&drv_data->regs->rx16);  in bfin_sport_spi_u16_reader()
234 bfin_sport_spi_u16_duplex(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_u16_duplex()  argument
236 	while (drv_data->rx < drv_data->rx_end) {  in bfin_sport_spi_u16_duplex()
237 		bfin_write(&drv_data->regs->tx16, *drv_data->tx16++);  in bfin_sport_spi_u16_duplex()
238 		bfin_sport_spi_stat_poll_complete(drv_data);  in bfin_sport_spi_u16_duplex()
239 		*drv_data->rx16++ = bfin_read(&drv_data->regs->rx16);  in bfin_sport_spi_u16_duplex()
251 bfin_sport_spi_restore_state(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_restore_state()  argument
253 	struct bfin_sport_spi_slave_data *chip = drv_data->cur_chip;  in bfin_sport_spi_restore_state()
255 	bfin_sport_spi_disable(drv_data);  in bfin_sport_spi_restore_state()
256 	dev_dbg(drv_data->dev, "restoring spi ctl state\n");  in bfin_sport_spi_restore_state()
258 	bfin_write(&drv_data->regs->tcr1, chip->ctl_reg);  in bfin_sport_spi_restore_state()
259 	bfin_write(&drv_data->regs->tclkdiv, chip->baud);  in bfin_sport_spi_restore_state()
262 	bfin_write(&drv_data->regs->rcr1, chip->ctl_reg & ~(ITCLK | ITFS));  in bfin_sport_spi_restore_state()
270 bfin_sport_spi_next_transfer(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_next_transfer()  argument
272 	struct spi_message *msg = drv_data->cur_msg;  in bfin_sport_spi_next_transfer()
273 	struct spi_transfer *trans = drv_data->cur_transfer;  in bfin_sport_spi_next_transfer()
277 		drv_data->cur_transfer =  in bfin_sport_spi_next_transfer()
291 bfin_sport_spi_giveback(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_giveback()  argument
293 	struct bfin_sport_spi_slave_data *chip = drv_data->cur_chip;  in bfin_sport_spi_giveback()
297 	spin_lock_irqsave(&drv_data->lock, flags);  in bfin_sport_spi_giveback()
298 	msg = drv_data->cur_msg;  in bfin_sport_spi_giveback()
299 	drv_data->state = START_STATE;  in bfin_sport_spi_giveback()
300 	drv_data->cur_msg = NULL;  in bfin_sport_spi_giveback()
301 	drv_data->cur_transfer = NULL;  in bfin_sport_spi_giveback()
302 	drv_data->cur_chip = NULL;  in bfin_sport_spi_giveback()
303 	queue_work(drv_data->workqueue, &drv_data->pump_messages);  in bfin_sport_spi_giveback()
304 	spin_unlock_irqrestore(&drv_data->lock, flags);  in bfin_sport_spi_giveback()
306 	if (!drv_data->cs_change)  in bfin_sport_spi_giveback()
316 	struct bfin_sport_spi_master_data *drv_data = dev_id;  in sport_err_handler()  local
319 	dev_dbg(drv_data->dev, "%s enter\n", __func__);  in sport_err_handler()
320 	status = bfin_read(&drv_data->regs->stat) & (TOVF | TUVF | ROVF | RUVF);  in sport_err_handler()
323 		bfin_write(&drv_data->regs->stat, status);  in sport_err_handler()
326 		bfin_sport_spi_disable(drv_data);  in sport_err_handler()
327 		dev_err(drv_data->dev, "status error:%s%s%s%s\n",  in sport_err_handler()
340 	struct bfin_sport_spi_master_data *drv_data = (void *)data;  in bfin_sport_spi_pump_transfers()  local
351 	message = drv_data->cur_msg;  in bfin_sport_spi_pump_transfers()
352 	transfer = drv_data->cur_transfer;  in bfin_sport_spi_pump_transfers()
353 	chip = drv_data->cur_chip;  in bfin_sport_spi_pump_transfers()
356 	bfin_write(&drv_data->regs->tclkdiv, transfer_speed);  in bfin_sport_spi_pump_transfers()
364 	if (drv_data->state == ERROR_STATE) {  in bfin_sport_spi_pump_transfers()
365 		dev_dbg(drv_data->dev, "transfer: we've hit an error\n");  in bfin_sport_spi_pump_transfers()
367 		bfin_sport_spi_giveback(drv_data);  in bfin_sport_spi_pump_transfers()
372 	if (drv_data->state == DONE_STATE) {  in bfin_sport_spi_pump_transfers()
373 		dev_dbg(drv_data->dev, "transfer: all done!\n");  in bfin_sport_spi_pump_transfers()
375 		bfin_sport_spi_giveback(drv_data);  in bfin_sport_spi_pump_transfers()
380 	if (drv_data->state == RUNNING_STATE) {  in bfin_sport_spi_pump_transfers()
381 		dev_dbg(drv_data->dev, "transfer: still running ...\n");  in bfin_sport_spi_pump_transfers()
390 		drv_data->state = bfin_sport_spi_next_transfer(drv_data);  in bfin_sport_spi_pump_transfers()
392 		tasklet_schedule(&drv_data->pump_transfers);  in bfin_sport_spi_pump_transfers()
396 		drv_data->tx = (void *)transfer->tx_buf;  in bfin_sport_spi_pump_transfers()
397 		drv_data->tx_end = drv_data->tx + transfer->len;  in bfin_sport_spi_pump_transfers()
398 		dev_dbg(drv_data->dev, "tx_buf is %p, tx_end is %p\n",  in bfin_sport_spi_pump_transfers()
399 			transfer->tx_buf, drv_data->tx_end);  in bfin_sport_spi_pump_transfers()
401 		drv_data->tx = NULL;  in bfin_sport_spi_pump_transfers()
405 		drv_data->rx = transfer->rx_buf;  in bfin_sport_spi_pump_transfers()
406 		drv_data->rx_end = drv_data->rx + transfer->len;  in bfin_sport_spi_pump_transfers()
407 		dev_dbg(drv_data->dev, "rx_buf is %p, rx_end is %p\n",  in bfin_sport_spi_pump_transfers()
408 			transfer->rx_buf, drv_data->rx_end);  in bfin_sport_spi_pump_transfers()
410 		drv_data->rx = NULL;  in bfin_sport_spi_pump_transfers()
412 	drv_data->cs_change = transfer->cs_change;  in bfin_sport_spi_pump_transfers()
417 		drv_data->ops = &bfin_sport_transfer_ops_u16;  in bfin_sport_spi_pump_transfers()
419 		drv_data->ops = &bfin_sport_transfer_ops_u8;  in bfin_sport_spi_pump_transfers()
420 	bfin_write(&drv_data->regs->tcr2, bits_per_word - 1);  in bfin_sport_spi_pump_transfers()
421 	bfin_write(&drv_data->regs->tfsdiv, bits_per_word - 1);  in bfin_sport_spi_pump_transfers()
422 	bfin_write(&drv_data->regs->rcr2, bits_per_word - 1);  in bfin_sport_spi_pump_transfers()
424 	drv_data->state = RUNNING_STATE;  in bfin_sport_spi_pump_transfers()
426 	if (drv_data->cs_change)  in bfin_sport_spi_pump_transfers()
429 	dev_dbg(drv_data->dev,  in bfin_sport_spi_pump_transfers()
434 	dev_dbg(drv_data->dev, "doing IO transfer\n");  in bfin_sport_spi_pump_transfers()
436 	bfin_sport_spi_enable(drv_data);  in bfin_sport_spi_pump_transfers()
439 		BUG_ON((drv_data->tx_end - drv_data->tx) !=  in bfin_sport_spi_pump_transfers()
440 		       (drv_data->rx_end - drv_data->rx));  in bfin_sport_spi_pump_transfers()
441 		drv_data->ops->duplex(drv_data);  in bfin_sport_spi_pump_transfers()
443 		if (drv_data->tx != drv_data->tx_end)  in bfin_sport_spi_pump_transfers()
445 	} else if (drv_data->tx != NULL) {  in bfin_sport_spi_pump_transfers()
448 		drv_data->ops->write(drv_data);  in bfin_sport_spi_pump_transfers()
450 		if (drv_data->tx != drv_data->tx_end)  in bfin_sport_spi_pump_transfers()
452 	} else if (drv_data->rx != NULL) {  in bfin_sport_spi_pump_transfers()
455 		drv_data->ops->read(drv_data);  in bfin_sport_spi_pump_transfers()
456 		if (drv_data->rx != drv_data->rx_end)  in bfin_sport_spi_pump_transfers()
459 	bfin_sport_spi_disable(drv_data);  in bfin_sport_spi_pump_transfers()
462 		dev_dbg(drv_data->dev, "IO write error!\n");  in bfin_sport_spi_pump_transfers()
463 		drv_data->state = ERROR_STATE;  in bfin_sport_spi_pump_transfers()
468 		drv_data->state = bfin_sport_spi_next_transfer(drv_data);  in bfin_sport_spi_pump_transfers()
469 		if (drv_data->cs_change)  in bfin_sport_spi_pump_transfers()
474 	tasklet_schedule(&drv_data->pump_transfers);  in bfin_sport_spi_pump_transfers()
481 	struct bfin_sport_spi_master_data *drv_data;  in bfin_sport_spi_pump_messages()  local
485 	drv_data = container_of(work, struct bfin_sport_spi_master_data, pump_messages);  in bfin_sport_spi_pump_messages()
488 	spin_lock_irqsave(&drv_data->lock, flags);  in bfin_sport_spi_pump_messages()
489 	if (list_empty(&drv_data->queue) || !drv_data->run) {  in bfin_sport_spi_pump_messages()
491 		drv_data->busy = 0;  in bfin_sport_spi_pump_messages()
492 		spin_unlock_irqrestore(&drv_data->lock, flags);  in bfin_sport_spi_pump_messages()
497 	if (drv_data->cur_msg) {  in bfin_sport_spi_pump_messages()
498 		spin_unlock_irqrestore(&drv_data->lock, flags);  in bfin_sport_spi_pump_messages()
503 	next_msg = list_entry(drv_data->queue.next,  in bfin_sport_spi_pump_messages()
506 	drv_data->cur_msg = next_msg;  in bfin_sport_spi_pump_messages()
509 	drv_data->cur_chip = spi_get_ctldata(drv_data->cur_msg->spi);  in bfin_sport_spi_pump_messages()
511 	list_del_init(&drv_data->cur_msg->queue);  in bfin_sport_spi_pump_messages()
514 	drv_data->cur_msg->state = START_STATE;  in bfin_sport_spi_pump_messages()
515 	drv_data->cur_transfer = list_entry(drv_data->cur_msg->transfers.next,  in bfin_sport_spi_pump_messages()
517 	bfin_sport_spi_restore_state(drv_data);  in bfin_sport_spi_pump_messages()
518 	dev_dbg(drv_data->dev, "got a message to pump, "  in bfin_sport_spi_pump_messages()
520 		drv_data->cur_chip->baud, drv_data->cur_chip->cs_gpio,  in bfin_sport_spi_pump_messages()
521 		drv_data->cur_chip->ctl_reg);  in bfin_sport_spi_pump_messages()
523 	dev_dbg(drv_data->dev,  in bfin_sport_spi_pump_messages()
525 		drv_data->cur_transfer->len);  in bfin_sport_spi_pump_messages()
528 	tasklet_schedule(&drv_data->pump_transfers);  in bfin_sport_spi_pump_messages()
530 	drv_data->busy = 1;  in bfin_sport_spi_pump_messages()
531 	spin_unlock_irqrestore(&drv_data->lock, flags);  in bfin_sport_spi_pump_messages()
541 	struct bfin_sport_spi_master_data *drv_data = spi_master_get_devdata(spi->master);  in bfin_sport_spi_transfer()  local
544 	spin_lock_irqsave(&drv_data->lock, flags);  in bfin_sport_spi_transfer()
546 	if (!drv_data->run) {  in bfin_sport_spi_transfer()
547 		spin_unlock_irqrestore(&drv_data->lock, flags);  in bfin_sport_spi_transfer()
556 	list_add_tail(&msg->queue, &drv_data->queue);  in bfin_sport_spi_transfer()
558 	if (drv_data->run && !drv_data->busy)  in bfin_sport_spi_transfer()
559 		queue_work(drv_data->workqueue, &drv_data->pump_messages);  in bfin_sport_spi_transfer()
561 	spin_unlock_irqrestore(&drv_data->lock, flags);  in bfin_sport_spi_transfer()
657 bfin_sport_spi_init_queue(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_init_queue()  argument
659 	INIT_LIST_HEAD(&drv_data->queue);  in bfin_sport_spi_init_queue()
660 	spin_lock_init(&drv_data->lock);  in bfin_sport_spi_init_queue()
662 	drv_data->run = false;  in bfin_sport_spi_init_queue()
663 	drv_data->busy = 0;  in bfin_sport_spi_init_queue()
666 	tasklet_init(&drv_data->pump_transfers,  in bfin_sport_spi_init_queue()
667 		     bfin_sport_spi_pump_transfers, (unsigned long)drv_data);  in bfin_sport_spi_init_queue()
670 	INIT_WORK(&drv_data->pump_messages, bfin_sport_spi_pump_messages);  in bfin_sport_spi_init_queue()
671 	drv_data->workqueue =  in bfin_sport_spi_init_queue()
672 	    create_singlethread_workqueue(dev_name(drv_data->master->dev.parent));  in bfin_sport_spi_init_queue()
673 	if (drv_data->workqueue == NULL)  in bfin_sport_spi_init_queue()
680 bfin_sport_spi_start_queue(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_start_queue()  argument
684 	spin_lock_irqsave(&drv_data->lock, flags);  in bfin_sport_spi_start_queue()
686 	if (drv_data->run || drv_data->busy) {  in bfin_sport_spi_start_queue()
687 		spin_unlock_irqrestore(&drv_data->lock, flags);  in bfin_sport_spi_start_queue()
691 	drv_data->run = true;  in bfin_sport_spi_start_queue()
692 	drv_data->cur_msg = NULL;  in bfin_sport_spi_start_queue()
693 	drv_data->cur_transfer = NULL;  in bfin_sport_spi_start_queue()
694 	drv_data->cur_chip = NULL;  in bfin_sport_spi_start_queue()
695 	spin_unlock_irqrestore(&drv_data->lock, flags);  in bfin_sport_spi_start_queue()
697 	queue_work(drv_data->workqueue, &drv_data->pump_messages);  in bfin_sport_spi_start_queue()
703 bfin_sport_spi_stop_queue(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_stop_queue()  argument
709 	spin_lock_irqsave(&drv_data->lock, flags);  in bfin_sport_spi_stop_queue()
717 	drv_data->run = false;  in bfin_sport_spi_stop_queue()
718 	while (!list_empty(&drv_data->queue) && drv_data->busy && limit--) {  in bfin_sport_spi_stop_queue()
719 		spin_unlock_irqrestore(&drv_data->lock, flags);  in bfin_sport_spi_stop_queue()
721 		spin_lock_irqsave(&drv_data->lock, flags);  in bfin_sport_spi_stop_queue()
724 	if (!list_empty(&drv_data->queue) || drv_data->busy)  in bfin_sport_spi_stop_queue()
727 	spin_unlock_irqrestore(&drv_data->lock, flags);  in bfin_sport_spi_stop_queue()
733 bfin_sport_spi_destroy_queue(struct bfin_sport_spi_master_data *drv_data)  in bfin_sport_spi_destroy_queue()  argument
737 	status = bfin_sport_spi_stop_queue(drv_data);  in bfin_sport_spi_destroy_queue()
741 	destroy_workqueue(drv_data->workqueue);  in bfin_sport_spi_destroy_queue()
752 	struct bfin_sport_spi_master_data *drv_data;  in bfin_sport_spi_probe()  local
764 	drv_data = spi_master_get_devdata(master);  in bfin_sport_spi_probe()
765 	drv_data->master = master;  in bfin_sport_spi_probe()
766 	drv_data->dev = dev;  in bfin_sport_spi_probe()
767 	drv_data->pin_req = platform_info->pin_req;  in bfin_sport_spi_probe()
785 	drv_data->regs = ioremap(res->start, resource_size(res));  in bfin_sport_spi_probe()
786 	if (drv_data->regs == NULL) {  in bfin_sport_spi_probe()
798 	drv_data->err_irq = ires->start;  in bfin_sport_spi_probe()
801 	status = bfin_sport_spi_init_queue(drv_data);  in bfin_sport_spi_probe()
807 	status = bfin_sport_spi_start_queue(drv_data);  in bfin_sport_spi_probe()
813 	status = request_irq(drv_data->err_irq, sport_err_handler,  in bfin_sport_spi_probe()
814 		0, "sport_spi_err", drv_data);  in bfin_sport_spi_probe()
820 	status = peripheral_request_list(drv_data->pin_req, DRV_NAME);  in bfin_sport_spi_probe()
827 	platform_set_drvdata(pdev, drv_data);  in bfin_sport_spi_probe()
834 	dev_info(dev, "%s, regs_base@%p\n", DRV_DESC, drv_data->regs);  in bfin_sport_spi_probe()
838 	peripheral_free_list(drv_data->pin_req);  in bfin_sport_spi_probe()
840 	free_irq(drv_data->err_irq, drv_data);  in bfin_sport_spi_probe()
843 	bfin_sport_spi_destroy_queue(drv_data);  in bfin_sport_spi_probe()
845 	iounmap(drv_data->regs);  in bfin_sport_spi_probe()
856 	struct bfin_sport_spi_master_data *drv_data = platform_get_drvdata(pdev);  in bfin_sport_spi_remove()  local
859 	if (!drv_data)  in bfin_sport_spi_remove()
863 	status = bfin_sport_spi_destroy_queue(drv_data);  in bfin_sport_spi_remove()
868 	bfin_sport_spi_disable(drv_data);  in bfin_sport_spi_remove()
871 	spi_unregister_master(drv_data->master);  in bfin_sport_spi_remove()
873 	peripheral_free_list(drv_data->pin_req);  in bfin_sport_spi_remove()
881 	struct bfin_sport_spi_master_data *drv_data = dev_get_drvdata(dev);  in bfin_sport_spi_suspend()  local
884 	status = bfin_sport_spi_stop_queue(drv_data);  in bfin_sport_spi_suspend()
889 	bfin_sport_spi_disable(drv_data);  in bfin_sport_spi_suspend()
896 	struct bfin_sport_spi_master_data *drv_data = dev_get_drvdata(dev);  in bfin_sport_spi_resume()  local
900 	bfin_sport_spi_enable(drv_data);  in bfin_sport_spi_resume()
903 	status = bfin_sport_spi_start_queue(drv_data);  in bfin_sport_spi_resume()
905 		dev_err(drv_data->dev, "problem resuming queue\n");  in bfin_sport_spi_resume()