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


#include <linux/kernel.h>
#include <linux/export.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
1574cf6c BZ	2	#include <linux/kernel.h>
38789fda	3	#include <linux/export.h>
1574cf6c BZ	4	#include <linux/ide.h>
1574cf6c BZ	5
15a453a9 BZ	6	#if defined(CONFIG_ARM) \|\| defined(CONFIG_M68K) \|\| defined(CONFIG_MIPS) \|\| \
	7	defined(CONFIG_PARISC) \|\| defined(CONFIG_PPC) \|\| defined(CONFIG_SPARC)
	8	#include <asm/ide.h>
	9	#else
	10	#include <asm-generic/ide_iops.h>
	11	#endif
	12
1574cf6c BZ	13	/*
	14	* Conventional PIO operations for ATA devices
	15	*/
	16
	17	static u8 ide_inb(unsigned long port)
	18	{
	19	return (u8) inb(port);
	20	}
	21
	22	static void ide_outb(u8 val, unsigned long port)
	23	{
	24	outb(val, port);
	25	}
	26
	27	/*
	28	* MMIO operations, typically used for SATA controllers
	29	*/
	30
	31	static u8 ide_mm_inb(unsigned long port)
	32	{
	33	return (u8) readb((void __iomem *) port);
	34	}
	35
	36	static void ide_mm_outb(u8 value, unsigned long port)
	37	{
	38	writeb(value, (void __iomem *) port);
	39	}
	40
	41	void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
	42	{
	43	if (hwif->host_flags & IDE_HFLAG_MMIO)
	44	writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
	45	else
	46	outb(cmd, hwif->io_ports.command_addr);
	47	}
	48	EXPORT_SYMBOL_GPL(ide_exec_command);
	49
	50	u8 ide_read_status(ide_hwif_t *hwif)
	51	{
	52	if (hwif->host_flags & IDE_HFLAG_MMIO)
	53	return readb((void __iomem *)hwif->io_ports.status_addr);
	54	else
	55	return inb(hwif->io_ports.status_addr);
	56	}
	57	EXPORT_SYMBOL_GPL(ide_read_status);
	58
	59	u8 ide_read_altstatus(ide_hwif_t *hwif)
	60	{
	61	if (hwif->host_flags & IDE_HFLAG_MMIO)
	62	return readb((void __iomem *)hwif->io_ports.ctl_addr);
	63	else
	64	return inb(hwif->io_ports.ctl_addr);
	65	}
	66	EXPORT_SYMBOL_GPL(ide_read_altstatus);
	67
ecf3a31d	68	void ide_write_devctl(ide_hwif_t *hwif, u8 ctl)
1574cf6c	69	{
1574cf6c BZ	70	if (hwif->host_flags & IDE_HFLAG_MMIO)
	71	writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
	72	else
	73	outb(ctl, hwif->io_ports.ctl_addr);
	74	}
ecf3a31d	75	EXPORT_SYMBOL_GPL(ide_write_devctl);
1574cf6c	76
abb596b2 SS	77	void ide_dev_select(ide_drive_t *drive)
	78	{
	79	ide_hwif_t *hwif = drive->hwif;
	80	u8 select = drive->select \| ATA_DEVICE_OBS;
	81
	82	if (hwif->host_flags & IDE_HFLAG_MMIO)
	83	writeb(select, (void __iomem *)hwif->io_ports.device_addr);
	84	else
	85	outb(select, hwif->io_ports.device_addr);
	86	}
	87	EXPORT_SYMBOL_GPL(ide_dev_select);
	88
c9ff9e7b	89	void ide_tf_load(ide_drive_t drive, struct ide_taskfile tf, u8 valid)
1574cf6c BZ	90	{
	91	ide_hwif_t *hwif = drive->hwif;
	92	struct ide_io_ports *io_ports = &hwif->io_ports;
1574cf6c BZ	93	void (*tf_outb)(u8 addr, unsigned long port);
1574cf6c BZ	94	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
1574cf6c BZ	95
	96	if (mmio)
	97	tf_outb = ide_mm_outb;
	98	else
	99	tf_outb = ide_outb;
	100
60f85019	101	if (valid & IDE_VALID_FEATURE)
1574cf6c	102	tf_outb(tf->feature, io_ports->feature_addr);
60f85019	103	if (valid & IDE_VALID_NSECT)
1574cf6c	104	tf_outb(tf->nsect, io_ports->nsect_addr);
60f85019	105	if (valid & IDE_VALID_LBAL)
1574cf6c	106	tf_outb(tf->lbal, io_ports->lbal_addr);
60f85019	107	if (valid & IDE_VALID_LBAM)
1574cf6c	108	tf_outb(tf->lbam, io_ports->lbam_addr);
60f85019	109	if (valid & IDE_VALID_LBAH)
1574cf6c	110	tf_outb(tf->lbah, io_ports->lbah_addr);
60f85019	111	if (valid & IDE_VALID_DEVICE)
4109d19a	112	tf_outb(tf->device, io_ports->device_addr);
1574cf6c BZ	113	}
	114	EXPORT_SYMBOL_GPL(ide_tf_load);
	115
3153c26b	116	void ide_tf_read(ide_drive_t drive, struct ide_taskfile tf, u8 valid)
1574cf6c BZ	117	{
	118	ide_hwif_t *hwif = drive->hwif;
	119	struct ide_io_ports *io_ports = &hwif->io_ports;
1574cf6c BZ	120	u8 (*tf_inb)(unsigned long port);
	121	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
	122
30881b9a	123	if (mmio)
1574cf6c	124	tf_inb = ide_mm_inb;
30881b9a	125	else
1574cf6c	126	tf_inb = ide_inb;
1574cf6c	127
60f85019	128	if (valid & IDE_VALID_ERROR)
67625119	129	tf->error = tf_inb(io_ports->feature_addr);
60f85019	130	if (valid & IDE_VALID_NSECT)
1574cf6c	131	tf->nsect = tf_inb(io_ports->nsect_addr);
60f85019	132	if (valid & IDE_VALID_LBAL)
1574cf6c	133	tf->lbal = tf_inb(io_ports->lbal_addr);
60f85019	134	if (valid & IDE_VALID_LBAM)
1574cf6c	135	tf->lbam = tf_inb(io_ports->lbam_addr);
60f85019	136	if (valid & IDE_VALID_LBAH)
1574cf6c	137	tf->lbah = tf_inb(io_ports->lbah_addr);
60f85019	138	if (valid & IDE_VALID_DEVICE)
1574cf6c	139	tf->device = tf_inb(io_ports->device_addr);
1574cf6c BZ	140	}
	141	EXPORT_SYMBOL_GPL(ide_tf_read);
	142
	143	/*
	144	* Some localbus EIDE interfaces require a special access sequence
	145	* when using 32-bit I/O instructions to transfer data. We call this
	146	* the "vlb_sync" sequence, which consists of three successive reads
	147	* of the sector count register location, with interrupts disabled
	148	* to ensure that the reads all happen together.
	149	*/
	150	static void ata_vlb_sync(unsigned long port)
	151	{
	152	(void)inb(port);
	153	(void)inb(port);
	154	(void)inb(port);
	155	}
	156
	157	/*
	158	* This is used for most PIO data transfers from the IDE interface
	159	*
	160	* These routines will round up any request for an odd number of bytes,
	161	* so if an odd len is specified, be sure that there's at least one
	162	* extra byte allocated for the buffer.
	163	*/
adb1af98	164	void ide_input_data(ide_drive_t drive, struct ide_cmd cmd, void *buf,
1574cf6c BZ	165	unsigned int len)
	166	{
	167	ide_hwif_t *hwif = drive->hwif;
	168	struct ide_io_ports *io_ports = &hwif->io_ports;
	169	unsigned long data_addr = io_ports->data_addr;
deae17fd	170	unsigned int words = (len + 1) >> 1;
1574cf6c BZ	171	u8 io_32bit = drive->io_32bit;
	172	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
	173
1574cf6c BZ	174	if (io_32bit) {
	175	unsigned long uninitialized_var(flags);
	176
	177	if ((io_32bit & 2) && !mmio) {
	178	local_irq_save(flags);
	179	ata_vlb_sync(io_ports->nsect_addr);
	180	}
	181
deae17fd	182	words >>= 1;
1574cf6c	183	if (mmio)
deae17fd	184	__ide_mm_insl((void __iomem *)data_addr, buf, words);
1574cf6c	185	else
deae17fd	186	insl(data_addr, buf, words);
1574cf6c BZ	187
	188	if ((io_32bit & 2) && !mmio)
	189	local_irq_restore(flags);
	190
deae17fd SS	191	if (((len + 1) & 3) < 2)
	192	return;
	193
	194	buf += len & ~3;
	195	words = 1;
1574cf6c	196	}
deae17fd SS	197
	198	if (mmio)
	199	__ide_mm_insw((void __iomem *)data_addr, buf, words);
	200	else
	201	insw(data_addr, buf, words);
1574cf6c BZ	202	}
	203	EXPORT_SYMBOL_GPL(ide_input_data);
	204
	205	/*
	206	* This is used for most PIO data transfers to the IDE interface
	207	*/
adb1af98	208	void ide_output_data(ide_drive_t drive, struct ide_cmd cmd, void *buf,
1574cf6c BZ	209	unsigned int len)
	210	{
	211	ide_hwif_t *hwif = drive->hwif;
	212	struct ide_io_ports *io_ports = &hwif->io_ports;
	213	unsigned long data_addr = io_ports->data_addr;
deae17fd	214	unsigned int words = (len + 1) >> 1;
1574cf6c BZ	215	u8 io_32bit = drive->io_32bit;
	216	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
	217
1574cf6c BZ	218	if (io_32bit) {
	219	unsigned long uninitialized_var(flags);
	220
	221	if ((io_32bit & 2) && !mmio) {
	222	local_irq_save(flags);
	223	ata_vlb_sync(io_ports->nsect_addr);
	224	}
	225
deae17fd	226	words >>= 1;
1574cf6c	227	if (mmio)
deae17fd	228	__ide_mm_outsl((void __iomem *)data_addr, buf, words);
1574cf6c	229	else
deae17fd	230	outsl(data_addr, buf, words);
1574cf6c BZ	231
	232	if ((io_32bit & 2) && !mmio)
	233	local_irq_restore(flags);
	234
deae17fd SS	235	if (((len + 1) & 3) < 2)
	236	return;
	237
	238	buf += len & ~3;
	239	words = 1;
1574cf6c	240	}
deae17fd SS	241
	242	if (mmio)
	243	__ide_mm_outsw((void __iomem *)data_addr, buf, words);
	244	else
	245	outsw(data_addr, buf, words);
1574cf6c BZ	246	}
	247	EXPORT_SYMBOL_GPL(ide_output_data);
	248
	249	const struct ide_tp_ops default_tp_ops = {
	250	.exec_command = ide_exec_command,
	251	.read_status = ide_read_status,
	252	.read_altstatus = ide_read_altstatus,
ecf3a31d	253	.write_devctl = ide_write_devctl,
1574cf6c	254
abb596b2	255	.dev_select = ide_dev_select,
1574cf6c BZ	256	.tf_load = ide_tf_load,
	257	.tf_read = ide_tf_read,
	258
	259	.input_data = ide_input_data,
	260	.output_data = ide_output_data,
	261	};