20  *	ide_xfer_verbose	-	return IDE mode names
21  *	@mode: transfer mode
23  *	Returns a constant string giving the name of the mode
27 const char *ide_xfer_verbose(u8 mode)  in ide_xfer_verbose()  argument
30 	u8 i = mode & 0xf;  in ide_xfer_verbose()
32 	if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)  in ide_xfer_verbose()
34 	else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_4)  in ide_xfer_verbose()
36 	else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)  in ide_xfer_verbose()
38 	else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_6)  in ide_xfer_verbose()
40 	else if (mode == XFER_PIO_SLOW)  in ide_xfer_verbose()
50  *	ide_get_best_pio_mode	-	get PIO mode from drive
51  *	@drive: drive to consider
52  *	@mode_wanted: preferred mode
53  *	@max_mode: highest allowed mode
55  *	This routine returns the recommended PIO settings for a given drive,
56  *	based on the drive->id information and the ide_pio_blacklist[].
58  *	Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
59  *	This is used by most chipset support modules when "auto-tuning".
62 static u8 ide_get_best_pio_mode(ide_drive_t *drive, u8 mode_wanted, u8 max_mode)  in ide_get_best_pio_mode()  argument
64 	u16 *id = drive->id;  in ide_get_best_pio_mode()
65 	int pio_mode = -1, overridden = 0;  in ide_get_best_pio_mode()
70 	if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0)  in ide_get_best_pio_mode()
73 	if (pio_mode != -1) {  in ide_get_best_pio_mode()
74 		printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);  in ide_get_best_pio_mode()
101 					 drive->name);  in ide_get_best_pio_mode()
110 int ide_pio_need_iordy(ide_drive_t *drive, const u8 pio)  in ide_pio_need_iordy()  argument
116 	if (pio == 0 && (drive->hwif->port_flags & IDE_PFLAG_PROBING))  in ide_pio_need_iordy()
118 	return ata_id_pio_need_iordy(drive->id, pio);  in ide_pio_need_iordy()
122 int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)  in ide_set_pio_mode()  argument
124 	ide_hwif_t *hwif = drive->hwif;  in ide_set_pio_mode()
125 	const struct ide_port_ops *port_ops = hwif->port_ops;  in ide_set_pio_mode()
127 	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)  in ide_set_pio_mode()
130 	if (port_ops == NULL || port_ops->set_pio_mode == NULL)  in ide_set_pio_mode()
131 		return -1;  in ide_set_pio_mode()
135 	 * set transfer mode on the device in ->set_pio_mode method...  in ide_set_pio_mode()
137 	if (port_ops->set_dma_mode == NULL) {  in ide_set_pio_mode()
138 		drive->pio_mode = mode;  in ide_set_pio_mode()
139 		port_ops->set_pio_mode(hwif, drive);  in ide_set_pio_mode()
143 	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {  in ide_set_pio_mode()
144 		if (ide_config_drive_speed(drive, mode))  in ide_set_pio_mode()
145 			return -1;  in ide_set_pio_mode()
146 		drive->pio_mode = mode;  in ide_set_pio_mode()
147 		port_ops->set_pio_mode(hwif, drive);  in ide_set_pio_mode()
150 		drive->pio_mode = mode;  in ide_set_pio_mode()
151 		port_ops->set_pio_mode(hwif, drive);  in ide_set_pio_mode()
152 		return ide_config_drive_speed(drive, mode);  in ide_set_pio_mode()
156 int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)  in ide_set_dma_mode()  argument
158 	ide_hwif_t *hwif = drive->hwif;  in ide_set_dma_mode()
159 	const struct ide_port_ops *port_ops = hwif->port_ops;  in ide_set_dma_mode()
161 	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)  in ide_set_dma_mode()
164 	if (port_ops == NULL || port_ops->set_dma_mode == NULL)  in ide_set_dma_mode()
165 		return -1;  in ide_set_dma_mode()
167 	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {  in ide_set_dma_mode()
168 		if (ide_config_drive_speed(drive, mode))  in ide_set_dma_mode()
169 			return -1;  in ide_set_dma_mode()
170 		drive->dma_mode = mode;  in ide_set_dma_mode()
171 		port_ops->set_dma_mode(hwif, drive);  in ide_set_dma_mode()
174 		drive->dma_mode = mode;  in ide_set_dma_mode()
175 		port_ops->set_dma_mode(hwif, drive);  in ide_set_dma_mode()
176 		return ide_config_drive_speed(drive, mode);  in ide_set_dma_mode()
181 /* req_pio == "255" for auto-tune */
182 void ide_set_pio(ide_drive_t *drive, u8 req_pio)  in ide_set_pio()  argument
184 	ide_hwif_t *hwif = drive->hwif;  in ide_set_pio()
185 	const struct ide_port_ops *port_ops = hwif->port_ops;  in ide_set_pio()
188 	if (port_ops == NULL || port_ops->set_pio_mode == NULL ||  in ide_set_pio()
189 	    (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))  in ide_set_pio()
192 	BUG_ON(hwif->pio_mask == 0x00);  in ide_set_pio()
194 	host_pio = fls(hwif->pio_mask) - 1;  in ide_set_pio()
196 	pio = ide_get_best_pio_mode(drive, req_pio, host_pio);  in ide_set_pio()
200 	 * - report device max PIO mode  in ide_set_pio()
201 	 * - check req_pio != 255 against device max PIO mode  in ide_set_pio()
204 			  drive->name, host_pio, req_pio,  in ide_set_pio()
205 			  req_pio == 255 ? "(auto-tune)" : "", pio);  in ide_set_pio()
207 	(void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);  in ide_set_pio()
212  *	ide_rate_filter		-	filter transfer mode
213  *	@drive: IDE device
222 static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)  in ide_rate_filter()  argument
224 	ide_hwif_t *hwif = drive->hwif;  in ide_rate_filter()
225 	u8 mode = ide_find_dma_mode(drive, speed);  in ide_rate_filter()  local
227 	if (mode == 0) {  in ide_rate_filter()
228 		if (hwif->pio_mask)  in ide_rate_filter()
229 			mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;  in ide_rate_filter()
231 			mode = XFER_PIO_4;  in ide_rate_filter()
234 /*	printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */  in ide_rate_filter()
236 	return min(speed, mode);  in ide_rate_filter()
240  *	ide_set_xfer_rate	-	set transfer rate
241  *	@drive: drive to set
246  *	which ->set_pio_mode/->set_dma_mode does not.
249 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)  in ide_set_xfer_rate()  argument
251 	ide_hwif_t *hwif = drive->hwif;  in ide_set_xfer_rate()
252 	const struct ide_port_ops *port_ops = hwif->port_ops;  in ide_set_xfer_rate()
254 	if (port_ops == NULL || port_ops->set_dma_mode == NULL ||  in ide_set_xfer_rate()
255 	    (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))  in ide_set_xfer_rate()
256 		return -1;  in ide_set_xfer_rate()
258 	rate = ide_rate_filter(drive, rate);  in ide_set_xfer_rate()
263 		return ide_set_pio_mode(drive, rate);  in ide_set_xfer_rate()
265 	return ide_set_dma_mode(drive, rate);  in ide_set_xfer_rate()