1 // SPDX-License-Identifier: GPL-2.0-only
21  *	ide_xfer_verbose	-	return IDE mode names
51  *	ide_get_best_pio_mode	-	get PIO mode from drive
57  *	based on the drive->id information and the ide_pio_blacklist[].
59  *	Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
60  *	This is used by most chipset support modules when "auto-tuning".
65 	u16 *id = drive->id;  in ide_get_best_pio_mode()
66 	int pio_mode = -1, overridden = 0;  in ide_get_best_pio_mode()
71 	if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0)  in ide_get_best_pio_mode()
74 	if (pio_mode != -1) {  in ide_get_best_pio_mode()
75 		printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);  in ide_get_best_pio_mode()
102 					 drive->name);  in ide_get_best_pio_mode()
117 	if (pio == 0 && (drive->hwif->port_flags & IDE_PFLAG_PROBING))  in ide_pio_need_iordy()
119 	return ata_id_pio_need_iordy(drive->id, pio);  in ide_pio_need_iordy()
125 	ide_hwif_t *hwif = drive->hwif;  in ide_set_pio_mode()
126 	const struct ide_port_ops *port_ops = hwif->port_ops;  in ide_set_pio_mode()
128 	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)  in ide_set_pio_mode()
131 	if (port_ops == NULL || port_ops->set_pio_mode == NULL)  in ide_set_pio_mode()
132 		return -1;  in ide_set_pio_mode()
136 	 * set transfer mode on the device in ->set_pio_mode method...  in ide_set_pio_mode()
138 	if (port_ops->set_dma_mode == NULL) {  in ide_set_pio_mode()
139 		drive->pio_mode = mode;  in ide_set_pio_mode()
140 		port_ops->set_pio_mode(hwif, drive);  in ide_set_pio_mode()
144 	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {  in ide_set_pio_mode()
146 			return -1;  in ide_set_pio_mode()
147 		drive->pio_mode = mode;  in ide_set_pio_mode()
148 		port_ops->set_pio_mode(hwif, drive);  in ide_set_pio_mode()
151 		drive->pio_mode = mode;  in ide_set_pio_mode()
152 		port_ops->set_pio_mode(hwif, drive);  in ide_set_pio_mode()
159 	ide_hwif_t *hwif = drive->hwif;  in ide_set_dma_mode()
160 	const struct ide_port_ops *port_ops = hwif->port_ops;  in ide_set_dma_mode()
162 	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)  in ide_set_dma_mode()
165 	if (port_ops == NULL || port_ops->set_dma_mode == NULL)  in ide_set_dma_mode()
166 		return -1;  in ide_set_dma_mode()
168 	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {  in ide_set_dma_mode()
170 			return -1;  in ide_set_dma_mode()
171 		drive->dma_mode = mode;  in ide_set_dma_mode()
172 		port_ops->set_dma_mode(hwif, drive);  in ide_set_dma_mode()
175 		drive->dma_mode = mode;  in ide_set_dma_mode()
176 		port_ops->set_dma_mode(hwif, drive);  in ide_set_dma_mode()
182 /* req_pio == "255" for auto-tune */
185 	ide_hwif_t *hwif = drive->hwif;  in ide_set_pio()
186 	const struct ide_port_ops *port_ops = hwif->port_ops;  in ide_set_pio()
189 	if (port_ops == NULL || port_ops->set_pio_mode == NULL ||  in ide_set_pio()
190 	    (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))  in ide_set_pio()
193 	BUG_ON(hwif->pio_mask == 0x00);  in ide_set_pio()
195 	host_pio = fls(hwif->pio_mask) - 1;  in ide_set_pio()
201 	 * - report device max PIO mode  in ide_set_pio()
202 	 * - check req_pio != 255 against device max PIO mode  in ide_set_pio()
204 	printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",  in ide_set_pio()
205 			  drive->name, host_pio, req_pio,  in ide_set_pio()
206 			  req_pio == 255 ? "(auto-tune)" : "", pio);  in ide_set_pio()
213  *	ide_rate_filter		-	filter transfer mode
215  *	@speed: desired speed
218  *	the best available speed at or below the speed requested.
223 static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)  in ide_rate_filter()  argument
225 	ide_hwif_t *hwif = drive->hwif;  in ide_rate_filter()
226 	u8 mode = ide_find_dma_mode(drive, speed);  in ide_rate_filter()
229 		if (hwif->pio_mask)  in ide_rate_filter()
230 			mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;  in ide_rate_filter()
235 /*	printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */  in ide_rate_filter()
237 	return min(speed, mode);  in ide_rate_filter()
241  *	ide_set_xfer_rate	-	set transfer rate
243  *	@rate: speed to attempt to set
245  *	General helper for setting the speed of an IDE device. This
247  *	which ->set_pio_mode/->set_dma_mode does not.
252 	ide_hwif_t *hwif = drive->hwif;  in ide_set_xfer_rate()
253 	const struct ide_port_ops *port_ops = hwif->port_ops;  in ide_set_xfer_rate()
255 	if (port_ops == NULL || port_ops->set_dma_mode == NULL ||  in ide_set_xfer_rate()
256 	    (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))  in ide_set_xfer_rate()
257 		return -1;  in ide_set_xfer_rate()