[linux.git] / drivers / ide / ide-io-std.c


#include <linux/kernel.h>
#include <linux/ide.h>

#if defined(CONFIG_ARM) || defined(CONFIG_M68K) || defined(CONFIG_MIPS) || \
    defined(CONFIG_PARISC) || defined(CONFIG_PPC) || defined(CONFIG_SPARC)
#include <asm/ide.h>
#else
#include <asm-generic/ide_iops.h>
#endif

/*
 *	Conventional PIO operations for ATA devices
 */

static u8 ide_inb(unsigned long port)
{
	return (u8) inb(port);
}

static void ide_outb(u8 val, unsigned long port)
{
	outb(val, port);
}

/*
 *	MMIO operations, typically used for SATA controllers
 */

static u8 ide_mm_inb(unsigned long port)
{
	return (u8) readb((void __iomem *) port);
}

static void ide_mm_outb(u8 value, unsigned long port)
{
	writeb(value, (void __iomem *) port);
}

void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
{
	if (hwif->host_flags & IDE_HFLAG_MMIO)
		writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
	else
		outb(cmd, hwif->io_ports.command_addr);
}
EXPORT_SYMBOL_GPL(ide_exec_command);

u8 ide_read_status(ide_hwif_t *hwif)
{
	if (hwif->host_flags & IDE_HFLAG_MMIO)
		return readb((void __iomem *)hwif->io_ports.status_addr);
	else
		return inb(hwif->io_ports.status_addr);
}
EXPORT_SYMBOL_GPL(ide_read_status);

u8 ide_read_altstatus(ide_hwif_t *hwif)
{
	if (hwif->host_flags & IDE_HFLAG_MMIO)
		return readb((void __iomem *)hwif->io_ports.ctl_addr);
	else
		return inb(hwif->io_ports.ctl_addr);
}
EXPORT_SYMBOL_GPL(ide_read_altstatus);

void ide_write_devctl(ide_hwif_t *hwif, u8 ctl)
{
	if (hwif->host_flags & IDE_HFLAG_MMIO)
		writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
	else
		outb(ctl, hwif->io_ports.ctl_addr);
}
EXPORT_SYMBOL_GPL(ide_write_devctl);

void ide_dev_select(ide_drive_t *drive)
{
	ide_hwif_t *hwif = drive->hwif;
	u8 select = drive->select | ATA_DEVICE_OBS;

	if (hwif->host_flags & IDE_HFLAG_MMIO)
		writeb(select, (void __iomem *)hwif->io_ports.device_addr);
	else
		outb(select, hwif->io_ports.device_addr);
}
EXPORT_SYMBOL_GPL(ide_dev_select);

void ide_tf_load(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid)
{
	ide_hwif_t *hwif = drive->hwif;
	struct ide_io_ports *io_ports = &hwif->io_ports;
	void (*tf_outb)(u8 addr, unsigned long port);
	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;

	if (mmio)
		tf_outb = ide_mm_outb;
	else
		tf_outb = ide_outb;

	if (valid & IDE_VALID_FEATURE)
		tf_outb(tf->feature, io_ports->feature_addr);
	if (valid & IDE_VALID_NSECT)
		tf_outb(tf->nsect, io_ports->nsect_addr);
	if (valid & IDE_VALID_LBAL)
		tf_outb(tf->lbal, io_ports->lbal_addr);
	if (valid & IDE_VALID_LBAM)
		tf_outb(tf->lbam, io_ports->lbam_addr);
	if (valid & IDE_VALID_LBAH)
		tf_outb(tf->lbah, io_ports->lbah_addr);
	if (valid & IDE_VALID_DEVICE)
		tf_outb(tf->device, io_ports->device_addr);
}
EXPORT_SYMBOL_GPL(ide_tf_load);

void ide_tf_read(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid)
{
	ide_hwif_t *hwif = drive->hwif;
	struct ide_io_ports *io_ports = &hwif->io_ports;
	u8 (*tf_inb)(unsigned long port);
	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;

	if (mmio)
		tf_inb  = ide_mm_inb;
	else
		tf_inb  = ide_inb;

	if (valid & IDE_VALID_ERROR)
		tf->error  = tf_inb(io_ports->feature_addr);
	if (valid & IDE_VALID_NSECT)
		tf->nsect  = tf_inb(io_ports->nsect_addr);
	if (valid & IDE_VALID_LBAL)
		tf->lbal   = tf_inb(io_ports->lbal_addr);
	if (valid & IDE_VALID_LBAM)
		tf->lbam   = tf_inb(io_ports->lbam_addr);
	if (valid & IDE_VALID_LBAH)
		tf->lbah   = tf_inb(io_ports->lbah_addr);
	if (valid & IDE_VALID_DEVICE)
		tf->device = tf_inb(io_ports->device_addr);
}
EXPORT_SYMBOL_GPL(ide_tf_read);

/*
 * Some localbus EIDE interfaces require a special access sequence
 * when using 32-bit I/O instructions to transfer data.  We call this
 * the "vlb_sync" sequence, which consists of three successive reads
 * of the sector count register location, with interrupts disabled
 * to ensure that the reads all happen together.
 */
static void ata_vlb_sync(unsigned long port)
{
	(void)inb(port);
	(void)inb(port);
	(void)inb(port);
}

/*
 * This is used for most PIO data transfers *from* the IDE interface
 *
 * These routines will round up any request for an odd number of bytes,
 * so if an odd len is specified, be sure that there's at least one
 * extra byte allocated for the buffer.
 */
void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
		    unsigned int len)
{
	ide_hwif_t *hwif = drive->hwif;
	struct ide_io_ports *io_ports = &hwif->io_ports;
	unsigned long data_addr = io_ports->data_addr;
	unsigned int words = (len + 1) >> 1;
	u8 io_32bit = drive->io_32bit;
	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;

	if (io_32bit) {
		unsigned long uninitialized_var(flags);

		if ((io_32bit & 2) && !mmio) {
			local_irq_save(flags);
			ata_vlb_sync(io_ports->nsect_addr);
		}

		words >>= 1;
		if (mmio)
			__ide_mm_insl((void __iomem *)data_addr, buf, words);
		else
			insl(data_addr, buf, words);

		if ((io_32bit & 2) && !mmio)
			local_irq_restore(flags);

		if (((len + 1) & 3) < 2)
			return;

		buf += len & ~3;
		words = 1;
	}

	if (mmio)
		__ide_mm_insw((void __iomem *)data_addr, buf, words);
	else
		insw(data_addr, buf, words);
}
EXPORT_SYMBOL_GPL(ide_input_data);

/*
 * This is used for most PIO data transfers *to* the IDE interface
 */
void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
		     unsigned int len)
{
	ide_hwif_t *hwif = drive->hwif;
	struct ide_io_ports *io_ports = &hwif->io_ports;
	unsigned long data_addr = io_ports->data_addr;
	unsigned int words = (len + 1) >> 1;
	u8 io_32bit = drive->io_32bit;
	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;

	if (io_32bit) {
		unsigned long uninitialized_var(flags);

		if ((io_32bit & 2) && !mmio) {
			local_irq_save(flags);
			ata_vlb_sync(io_ports->nsect_addr);
		}

		words >>= 1;
		if (mmio)
			__ide_mm_outsl((void __iomem *)data_addr, buf, words);
		else
			outsl(data_addr, buf, words);

		if ((io_32bit & 2) && !mmio)
			local_irq_restore(flags);

		if (((len + 1) & 3) < 2)
			return;

		buf += len & ~3;
		words = 1;
	}

	if (mmio)
		__ide_mm_outsw((void __iomem *)data_addr, buf, words);
	else
		outsw(data_addr, buf, words);
}
EXPORT_SYMBOL_GPL(ide_output_data);

const struct ide_tp_ops default_tp_ops = {
	.exec_command		= ide_exec_command,
	.read_status		= ide_read_status,
	.read_altstatus		= ide_read_altstatus,
	.write_devctl		= ide_write_devctl,

	.dev_select		= ide_dev_select,
	.tf_load		= ide_tf_load,
	.tf_read		= ide_tf_read,

	.input_data		= ide_input_data,
	.output_data		= ide_output_data,
};
Commit	Line	Data
1574cf6c BZ	1
	2	#include <linux/kernel.h>
	3	#include <linux/ide.h>
	4
15a453a9 BZ	5	#if defined(CONFIG_ARM) \|\| defined(CONFIG_M68K) \|\| defined(CONFIG_MIPS) \|\| \
	6	defined(CONFIG_PARISC) \|\| defined(CONFIG_PPC) \|\| defined(CONFIG_SPARC)
	7	#include <asm/ide.h>
	8	#else
	9	#include <asm-generic/ide_iops.h>
	10	#endif
	11
1574cf6c BZ	12	/*
	13	* Conventional PIO operations for ATA devices
	14	*/
	15
	16	static u8 ide_inb(unsigned long port)
	17	{
	18	return (u8) inb(port);
	19	}
	20
	21	static void ide_outb(u8 val, unsigned long port)
	22	{
	23	outb(val, port);
	24	}
	25
	26	/*
	27	* MMIO operations, typically used for SATA controllers
	28	*/
	29
	30	static u8 ide_mm_inb(unsigned long port)
	31	{
	32	return (u8) readb((void __iomem *) port);
	33	}
	34
	35	static void ide_mm_outb(u8 value, unsigned long port)
	36	{
	37	writeb(value, (void __iomem *) port);
	38	}
	39
	40	void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
	41	{
	42	if (hwif->host_flags & IDE_HFLAG_MMIO)
	43	writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
	44	else
	45	outb(cmd, hwif->io_ports.command_addr);
	46	}
	47	EXPORT_SYMBOL_GPL(ide_exec_command);
	48
	49	u8 ide_read_status(ide_hwif_t *hwif)
	50	{
	51	if (hwif->host_flags & IDE_HFLAG_MMIO)
	52	return readb((void __iomem *)hwif->io_ports.status_addr);
	53	else
	54	return inb(hwif->io_ports.status_addr);
	55	}
	56	EXPORT_SYMBOL_GPL(ide_read_status);
	57
	58	u8 ide_read_altstatus(ide_hwif_t *hwif)
	59	{
	60	if (hwif->host_flags & IDE_HFLAG_MMIO)
	61	return readb((void __iomem *)hwif->io_ports.ctl_addr);
	62	else
	63	return inb(hwif->io_ports.ctl_addr);
	64	}
	65	EXPORT_SYMBOL_GPL(ide_read_altstatus);
	66
ecf3a31d	67	void ide_write_devctl(ide_hwif_t *hwif, u8 ctl)
1574cf6c	68	{
1574cf6c BZ	69	if (hwif->host_flags & IDE_HFLAG_MMIO)
	70	writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
	71	else
	72	outb(ctl, hwif->io_ports.ctl_addr);
	73	}
ecf3a31d	74	EXPORT_SYMBOL_GPL(ide_write_devctl);
1574cf6c	75
abb596b2 SS	76	void ide_dev_select(ide_drive_t *drive)
	77	{
	78	ide_hwif_t *hwif = drive->hwif;
	79	u8 select = drive->select \| ATA_DEVICE_OBS;
	80
	81	if (hwif->host_flags & IDE_HFLAG_MMIO)
	82	writeb(select, (void __iomem *)hwif->io_ports.device_addr);
	83	else
	84	outb(select, hwif->io_ports.device_addr);
	85	}
	86	EXPORT_SYMBOL_GPL(ide_dev_select);
	87
c9ff9e7b	88	void ide_tf_load(ide_drive_t drive, struct ide_taskfile tf, u8 valid)
1574cf6c BZ	89	{
	90	ide_hwif_t *hwif = drive->hwif;
	91	struct ide_io_ports *io_ports = &hwif->io_ports;
1574cf6c BZ	92	void (*tf_outb)(u8 addr, unsigned long port);
1574cf6c BZ	93	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
1574cf6c BZ	94
	95	if (mmio)
	96	tf_outb = ide_mm_outb;
	97	else
	98	tf_outb = ide_outb;
	99
60f85019	100	if (valid & IDE_VALID_FEATURE)
1574cf6c	101	tf_outb(tf->feature, io_ports->feature_addr);
60f85019	102	if (valid & IDE_VALID_NSECT)
1574cf6c	103	tf_outb(tf->nsect, io_ports->nsect_addr);
60f85019	104	if (valid & IDE_VALID_LBAL)
1574cf6c	105	tf_outb(tf->lbal, io_ports->lbal_addr);
60f85019	106	if (valid & IDE_VALID_LBAM)
1574cf6c	107	tf_outb(tf->lbam, io_ports->lbam_addr);
60f85019	108	if (valid & IDE_VALID_LBAH)
1574cf6c	109	tf_outb(tf->lbah, io_ports->lbah_addr);
60f85019	110	if (valid & IDE_VALID_DEVICE)
4109d19a	111	tf_outb(tf->device, io_ports->device_addr);
1574cf6c BZ	112	}
	113	EXPORT_SYMBOL_GPL(ide_tf_load);
	114
3153c26b	115	void ide_tf_read(ide_drive_t drive, struct ide_taskfile tf, u8 valid)
1574cf6c BZ	116	{
	117	ide_hwif_t *hwif = drive->hwif;
	118	struct ide_io_ports *io_ports = &hwif->io_ports;
1574cf6c BZ	119	u8 (*tf_inb)(unsigned long port);
	120	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
	121
30881b9a	122	if (mmio)
1574cf6c	123	tf_inb = ide_mm_inb;
30881b9a	124	else
1574cf6c	125	tf_inb = ide_inb;
1574cf6c	126
60f85019	127	if (valid & IDE_VALID_ERROR)
67625119	128	tf->error = tf_inb(io_ports->feature_addr);
60f85019	129	if (valid & IDE_VALID_NSECT)
1574cf6c	130	tf->nsect = tf_inb(io_ports->nsect_addr);
60f85019	131	if (valid & IDE_VALID_LBAL)
1574cf6c	132	tf->lbal = tf_inb(io_ports->lbal_addr);
60f85019	133	if (valid & IDE_VALID_LBAM)
1574cf6c	134	tf->lbam = tf_inb(io_ports->lbam_addr);
60f85019	135	if (valid & IDE_VALID_LBAH)
1574cf6c	136	tf->lbah = tf_inb(io_ports->lbah_addr);
60f85019	137	if (valid & IDE_VALID_DEVICE)
1574cf6c	138	tf->device = tf_inb(io_ports->device_addr);
1574cf6c BZ	139	}
	140	EXPORT_SYMBOL_GPL(ide_tf_read);
	141
	142	/*
	143	* Some localbus EIDE interfaces require a special access sequence
	144	* when using 32-bit I/O instructions to transfer data. We call this
	145	* the "vlb_sync" sequence, which consists of three successive reads
	146	* of the sector count register location, with interrupts disabled
	147	* to ensure that the reads all happen together.
	148	*/
	149	static void ata_vlb_sync(unsigned long port)
	150	{
	151	(void)inb(port);
	152	(void)inb(port);
	153	(void)inb(port);
	154	}
	155
	156	/*
	157	* This is used for most PIO data transfers from the IDE interface
	158	*
	159	* These routines will round up any request for an odd number of bytes,
	160	* so if an odd len is specified, be sure that there's at least one
	161	* extra byte allocated for the buffer.
	162	*/
adb1af98	163	void ide_input_data(ide_drive_t drive, struct ide_cmd cmd, void *buf,
1574cf6c BZ	164	unsigned int len)
	165	{
	166	ide_hwif_t *hwif = drive->hwif;
	167	struct ide_io_ports *io_ports = &hwif->io_ports;
	168	unsigned long data_addr = io_ports->data_addr;
deae17fd	169	unsigned int words = (len + 1) >> 1;
1574cf6c BZ	170	u8 io_32bit = drive->io_32bit;
	171	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
	172
1574cf6c BZ	173	if (io_32bit) {
	174	unsigned long uninitialized_var(flags);
	175
	176	if ((io_32bit & 2) && !mmio) {
	177	local_irq_save(flags);
	178	ata_vlb_sync(io_ports->nsect_addr);
	179	}
	180
deae17fd	181	words >>= 1;
1574cf6c	182	if (mmio)
deae17fd	183	__ide_mm_insl((void __iomem *)data_addr, buf, words);
1574cf6c	184	else
deae17fd	185	insl(data_addr, buf, words);
1574cf6c BZ	186
	187	if ((io_32bit & 2) && !mmio)
	188	local_irq_restore(flags);
	189
deae17fd SS	190	if (((len + 1) & 3) < 2)
	191	return;
	192
	193	buf += len & ~3;
	194	words = 1;
1574cf6c	195	}
deae17fd SS	196
	197	if (mmio)
	198	__ide_mm_insw((void __iomem *)data_addr, buf, words);
	199	else
	200	insw(data_addr, buf, words);
1574cf6c BZ	201	}
	202	EXPORT_SYMBOL_GPL(ide_input_data);
	203
	204	/*
	205	* This is used for most PIO data transfers to the IDE interface
	206	*/
adb1af98	207	void ide_output_data(ide_drive_t drive, struct ide_cmd cmd, void *buf,
1574cf6c BZ	208	unsigned int len)
	209	{
	210	ide_hwif_t *hwif = drive->hwif;
	211	struct ide_io_ports *io_ports = &hwif->io_ports;
	212	unsigned long data_addr = io_ports->data_addr;
deae17fd	213	unsigned int words = (len + 1) >> 1;
1574cf6c BZ	214	u8 io_32bit = drive->io_32bit;
	215	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
	216
1574cf6c BZ	217	if (io_32bit) {
	218	unsigned long uninitialized_var(flags);
	219
	220	if ((io_32bit & 2) && !mmio) {
	221	local_irq_save(flags);
	222	ata_vlb_sync(io_ports->nsect_addr);
	223	}
	224
deae17fd	225	words >>= 1;
1574cf6c	226	if (mmio)
deae17fd	227	__ide_mm_outsl((void __iomem *)data_addr, buf, words);
1574cf6c	228	else
deae17fd	229	outsl(data_addr, buf, words);
1574cf6c BZ	230
	231	if ((io_32bit & 2) && !mmio)
	232	local_irq_restore(flags);
	233
deae17fd SS	234	if (((len + 1) & 3) < 2)
	235	return;
	236
	237	buf += len & ~3;
	238	words = 1;
1574cf6c	239	}
deae17fd SS	240
	241	if (mmio)
	242	__ide_mm_outsw((void __iomem *)data_addr, buf, words);
	243	else
	244	outsw(data_addr, buf, words);
1574cf6c BZ	245	}
	246	EXPORT_SYMBOL_GPL(ide_output_data);
	247
	248	const struct ide_tp_ops default_tp_ops = {
	249	.exec_command = ide_exec_command,
	250	.read_status = ide_read_status,
	251	.read_altstatus = ide_read_altstatus,
ecf3a31d	252	.write_devctl = ide_write_devctl,
1574cf6c	253
abb596b2	254	.dev_select = ide_dev_select,
1574cf6c BZ	255	.tf_load = ide_tf_load,
	256	.tf_read = ide_tf_read,
	257
	258	.input_data = ide_input_data,
	259	.output_data = ide_output_data,
	260	};