51 static unsigned int bitbang_txrx_8(struct spi_device *spi,  in bitbang_txrx_8()  argument
63 	bitbang = spi_controller_get_devdata(spi->controller);  in bitbang_txrx_8()
70 			word = spi->mode & SPI_MOSI_IDLE_HIGH ? 0xFF : 0;  in bitbang_txrx_8()
71 		word = txrx_word(spi, ns, word, bits, flags);  in bitbang_txrx_8()
77 		bitbang->set_mosi_idle(spi);  in bitbang_txrx_8()
82 static unsigned int bitbang_txrx_16(struct spi_device *spi,  in bitbang_txrx_16()  argument
94 	bitbang = spi_controller_get_devdata(spi->controller);  in bitbang_txrx_16()
101 			word = spi->mode & SPI_MOSI_IDLE_HIGH ? 0xFFFF : 0;  in bitbang_txrx_16()
102 		word = txrx_word(spi, ns, word, bits, flags);  in bitbang_txrx_16()
108 		bitbang->set_mosi_idle(spi);  in bitbang_txrx_16()
113 static unsigned int bitbang_txrx_32(struct spi_device *spi,  in bitbang_txrx_32()  argument
125 	bitbang = spi_controller_get_devdata(spi->controller);  in bitbang_txrx_32()
132 			word = spi->mode & SPI_MOSI_IDLE_HIGH ? 0xFFFFFFFF : 0;  in bitbang_txrx_32()
133 		word = txrx_word(spi, ns, word, bits, flags);  in bitbang_txrx_32()
139 		bitbang->set_mosi_idle(spi);  in bitbang_txrx_32()
144 int spi_bitbang_setup_transfer(struct spi_device *spi, struct spi_transfer *t)  in spi_bitbang_setup_transfer()  argument
146 	struct spi_bitbang_cs	*cs = spi->controller_state;  in spi_bitbang_setup_transfer()
160 		bits_per_word = spi->bits_per_word;  in spi_bitbang_setup_transfer()
172 		hz = spi->max_speed_hz;  in spi_bitbang_setup_transfer()
186 int spi_bitbang_setup(struct spi_device *spi)  in spi_bitbang_setup()  argument
188 	struct spi_bitbang_cs	*cs = spi->controller_state;  in spi_bitbang_setup()
193 	bitbang = spi_controller_get_devdata(spi->controller);  in spi_bitbang_setup()
199 		spi->controller_state = cs;  in spi_bitbang_setup()
204 	cs->txrx_word = bitbang->txrx_word[spi->mode & (SPI_CPOL|SPI_CPHA)];  in spi_bitbang_setup()
211 		retval = bitbang->setup_transfer(spi, NULL);  in spi_bitbang_setup()
217 		bitbang->set_mosi_idle(spi);  in spi_bitbang_setup()
219 	dev_dbg(&spi->dev, "%s, %u nsec/bit\n", __func__, 2 * cs->nsecs);  in spi_bitbang_setup()
233 void spi_bitbang_cleanup(struct spi_device *spi)  in spi_bitbang_cleanup()  argument
235 	kfree(spi->controller_state);  in spi_bitbang_cleanup()
239 static int spi_bitbang_bufs(struct spi_device *spi, struct spi_transfer *t)  in spi_bitbang_bufs()  argument
241 	struct spi_bitbang_cs	*cs = spi->controller_state;  in spi_bitbang_bufs()
245 	bitbang = spi_controller_get_devdata(spi->controller);  in spi_bitbang_bufs()
249 		err = bitbang->set_line_direction(spi, !!(t->tx_buf));  in spi_bitbang_bufs()
254 	if (spi->mode & SPI_3WIRE) {  in spi_bitbang_bufs()
258 		return cs->txrx_bufs(spi, cs->txrx_word, nsecs, t, flags);  in spi_bitbang_bufs()
260 	return cs->txrx_bufs(spi, cs->txrx_word, nsecs, t, 0);  in spi_bitbang_bufs()
277 static int spi_bitbang_prepare_hardware(struct spi_controller *spi)  in spi_bitbang_prepare_hardware()  argument
281 	bitbang = spi_controller_get_devdata(spi);  in spi_bitbang_prepare_hardware()
291 				    struct spi_device *spi,  in spi_bitbang_transfer_one()  argument
298 		status = bitbang->setup_transfer(spi, transfer);  in spi_bitbang_transfer_one()
304 		status = bitbang->txrx_bufs(spi, transfer);  in spi_bitbang_transfer_one()
317 static int spi_bitbang_unprepare_hardware(struct spi_controller *spi)  in spi_bitbang_unprepare_hardware()  argument
321 	bitbang = spi_controller_get_devdata(spi);  in spi_bitbang_unprepare_hardware()
330 static void spi_bitbang_set_cs(struct spi_device *spi, bool enable)  in spi_bitbang_set_cs()  argument
332 	struct spi_bitbang *bitbang = spi_controller_get_devdata(spi->controller);  in spi_bitbang_set_cs()
338 	enable = (!!(spi->mode & SPI_CS_HIGH) == enable);  in spi_bitbang_set_cs()
341 	bitbang->chipselect(spi, enable ? BITBANG_CS_ACTIVE :  in spi_bitbang_set_cs()