1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * parport-to-butterfly adapter
31 #define	butterfly_nreset (1 << 1)		/* pin 3 */
46 	return spi->controller_data;  in spidev_to_pp()
64 /*----------------------------------------------------------------------*/
70 	u8			bit, byte = pp->lastbyte;  in setsck()
78 	parport_write_data(pp->port, byte);  in setsck()
79 	pp->lastbyte = byte;  in setsck()
86 	u8			bit, byte = pp->lastbyte;  in setmosi()
94 	parport_write_data(pp->port, byte);  in setmosi()
95 	pp->lastbyte = byte;  in setmosi()
107 	value = !(parport_read_status(pp->port) & bit);  in getmiso()
117 		setsck(spi, spi->mode & SPI_CPOL);  in butterfly_chipselect()
126 	parport_frob_control(pp->port, spi_cs_bit, value ? spi_cs_bit : 0);  in butterfly_chipselect()
134 #include "spi-bitbang-txrx.h"
143 /*----------------------------------------------------------------------*/
160 	 * sectors 3-5 = 512 pages * 264 bytes/page
182 	struct device		*dev = p->physport->dev;  in butterfly_attach()
194 		status = -ENOMEM;  in butterfly_attach()
205 	host->bus_num = 42;  in butterfly_attach()
206 	host->num_chipselect = 2;  in butterfly_attach()
208 	pp->bitbang.master = host;  in butterfly_attach()
209 	pp->bitbang.chipselect = butterfly_chipselect;  in butterfly_attach()
210 	pp->bitbang.txrx_word[SPI_MODE_0] = butterfly_txrx_word_mode0;  in butterfly_attach()
215 	pp->port = p;  in butterfly_attach()
220 		status = -ENOMEM;  in butterfly_attach()
223 	pp->pd = pd;  in butterfly_attach()
232 	pr_debug("%s: powerup/reset Butterfly\n", p->name);  in butterfly_attach()
235 	parport_frob_control(pp->port, spi_cs_bit, 0);  in butterfly_attach()
240 	pp->lastbyte |= vcc_bits;  in butterfly_attach()
241 	parport_write_data(pp->port, pp->lastbyte);  in butterfly_attach()
245 	pp->lastbyte |= butterfly_nreset;  in butterfly_attach()
246 	parport_write_data(pp->port, pp->lastbyte);  in butterfly_attach()
252 	status = spi_bitbang_start(&pp->bitbang);  in butterfly_attach()
261 	pp->info[0].max_speed_hz = 15 * 1000 * 1000;  in butterfly_attach()
262 	strcpy(pp->info[0].modalias, "mtd_dataflash");  in butterfly_attach()
263 	pp->info[0].platform_data = &flash;  in butterfly_attach()
264 	pp->info[0].chip_select = 1;  in butterfly_attach()
265 	pp->info[0].controller_data = pp;  in butterfly_attach()
266 	pp->dataflash = spi_new_device(pp->bitbang.master, &pp->info[0]);  in butterfly_attach()
267 	if (pp->dataflash)  in butterfly_attach()
268 		pr_debug("%s: dataflash at %s\n", p->name,  in butterfly_attach()
269 			 dev_name(&pp->dataflash->dev));  in butterfly_attach()
271 	pr_info("%s: AVR Butterfly\n", p->name);  in butterfly_attach()
277 	parport_write_data(pp->port, 0);  in butterfly_attach()
279 	parport_release(pp->pd);  in butterfly_attach()
285 	pr_debug("%s: butterfly probe, fail %d\n", p->name, status);  in butterfly_attach()
294 	 * "old school" driver-internal device lists?  in butterfly_detach()
296 	if (!butterfly || butterfly->port != p)  in butterfly_detach()
302 	spi_bitbang_stop(&pp->bitbang);  in butterfly_detach()
305 	parport_write_data(pp->port, 0);  in butterfly_detach()
308 	parport_release(pp->pd);  in butterfly_detach()
309 	parport_unregister_device(pp->pd);  in butterfly_detach()
311 	spi_controller_put(pp->bitbang.master);  in butterfly_detach()