185 	struct spi_bitbang	*bitbang;  in spi_bitbang_setup()  local
189 	bitbang = spi_master_get_devdata(spi->master);  in spi_bitbang_setup()
194 	if ((spi->mode & ~(SPI_CPOL|SPI_CPHA|bitbang->flags)) != 0)  in spi_bitbang_setup()
208 	cs->txrx_word = bitbang->txrx_word[spi->mode & (SPI_CPOL|SPI_CPHA)];  in spi_bitbang_setup()
212 	retval = bitbang->setup_transfer(spi, NULL);  in spi_bitbang_setup()
226 	spin_lock_irqsave(&bitbang->lock, flags);  in spi_bitbang_setup()
227 	if (!bitbang->busy) {  in spi_bitbang_setup()
228 		bitbang->chipselect(spi, BITBANG_CS_INACTIVE);  in spi_bitbang_setup()
231 	spin_unlock_irqrestore(&bitbang->lock, flags);  in spi_bitbang_setup()
269 	struct spi_bitbang	*bitbang =  in bitbang_work()  local
273 	spin_lock_irqsave(&bitbang->lock, flags);  in bitbang_work()
274 	bitbang->busy = 1;  in bitbang_work()
275 	while (!list_empty(&bitbang->queue)) {  in bitbang_work()
286 		m = container_of(bitbang->queue.next, struct spi_message,  in bitbang_work()
289 		spin_unlock_irqrestore(&bitbang->lock, flags);  in bitbang_work()
307 				setup_transfer = bitbang->setup_transfer;  in bitbang_work()
326 				bitbang->chipselect(spi, BITBANG_CS_ACTIVE);  in bitbang_work()
345 				status = bitbang->txrx_bufs(spi, t);  in bitbang_work()
370 			bitbang->chipselect(spi, BITBANG_CS_INACTIVE);  in bitbang_work()
387 			bitbang->chipselect(spi, BITBANG_CS_INACTIVE);  in bitbang_work()
391 		spin_lock_irqsave(&bitbang->lock, flags);  in bitbang_work()
393 	bitbang->busy = 0;  in bitbang_work()
394 	spin_unlock_irqrestore(&bitbang->lock, flags);  in bitbang_work()
402 	struct spi_bitbang	*bitbang;  in spi_bitbang_transfer()  local
409 	bitbang = spi_master_get_devdata(spi->master);  in spi_bitbang_transfer()
411 	spin_lock_irqsave(&bitbang->lock, flags);  in spi_bitbang_transfer()
415 		list_add_tail(&m->queue, &bitbang->queue);  in spi_bitbang_transfer()
416 		queue_work(bitbang->workqueue, &bitbang->work);  in spi_bitbang_transfer()
418 	spin_unlock_irqrestore(&bitbang->lock, flags);  in spi_bitbang_transfer()
449 int spi_bitbang_start(struct spi_bitbang *bitbang)  in spi_bitbang_start()  argument
453 	if (!bitbang->master || !bitbang->chipselect)  in spi_bitbang_start()
456 	INIT_WORK(&bitbang->work, bitbang_work);  in spi_bitbang_start()
457 	spin_lock_init(&bitbang->lock);  in spi_bitbang_start()
458 	INIT_LIST_HEAD(&bitbang->queue);  in spi_bitbang_start()
460 	if (!bitbang->master->transfer)  in spi_bitbang_start()
461 		bitbang->master->transfer = spi_bitbang_transfer;  in spi_bitbang_start()
462 	if (!bitbang->txrx_bufs) {  in spi_bitbang_start()
463 		bitbang->use_dma = 0;  in spi_bitbang_start()
464 		bitbang->txrx_bufs = spi_bitbang_bufs;  in spi_bitbang_start()
465 		if (!bitbang->master->setup) {  in spi_bitbang_start()
466 			if (!bitbang->setup_transfer)  in spi_bitbang_start()
467 				bitbang->setup_transfer =  in spi_bitbang_start()
469 			bitbang->master->setup = spi_bitbang_setup;  in spi_bitbang_start()
470 			bitbang->master->cleanup = spi_bitbang_cleanup;  in spi_bitbang_start()
472 	} else if (!bitbang->master->setup)  in spi_bitbang_start()
476 	bitbang->busy = 0;  in spi_bitbang_start()
477 	bitbang->workqueue = create_singlethread_workqueue(  in spi_bitbang_start()
478 			dev_name(bitbang->master->dev.parent));  in spi_bitbang_start()
479 	if (bitbang->workqueue == NULL) {  in spi_bitbang_start()
487 	status = spi_register_master(bitbang->master);  in spi_bitbang_start()
494 	destroy_workqueue(bitbang->workqueue);  in spi_bitbang_start()
503 int spi_bitbang_stop(struct spi_bitbang *bitbang)  in spi_bitbang_stop()  argument
505 	spi_unregister_master(bitbang->master);  in spi_bitbang_stop()
507 	WARN_ON(!list_empty(&bitbang->queue));  in spi_bitbang_stop()
509 	destroy_workqueue(bitbang->workqueue);  in spi_bitbang_stop()