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

// SPDX-License-Identifier: GPL-2.0-only

#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
457c8996	1	// SPDX-License-Identifier: GPL-2.0-only
1574cf6c BZ	2
1574cf6c BZ	3	#include <linux/kernel.h>
38789fda	4	#include <linux/export.h>
1574cf6c BZ	5	#include <linux/ide.h>
1574cf6c BZ	6
15a453a9 BZ	7	#if defined(CONFIG_ARM) \|\| defined(CONFIG_M68K) \|\| defined(CONFIG_MIPS) \|\| \
	8	defined(CONFIG_PARISC) \|\| defined(CONFIG_PPC) \|\| defined(CONFIG_SPARC)
	9	#include <asm/ide.h>
	10	#else
	11	#include <asm-generic/ide_iops.h>
	12	#endif
	13
1574cf6c BZ	14	/*
	15	* Conventional PIO operations for ATA devices
	16	*/
	17
	18	static u8 ide_inb(unsigned long port)
	19	{
	20	return (u8) inb(port);
	21	}
	22
	23	static void ide_outb(u8 val, unsigned long port)
	24	{
	25	outb(val, port);
	26	}
	27
	28	/*
	29	* MMIO operations, typically used for SATA controllers
	30	*/
	31
	32	static u8 ide_mm_inb(unsigned long port)
	33	{
	34	return (u8) readb((void __iomem *) port);
	35	}
	36
	37	static void ide_mm_outb(u8 value, unsigned long port)
	38	{
	39	writeb(value, (void __iomem *) port);
	40	}
	41
	42	void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
	43	{
	44	if (hwif->host_flags & IDE_HFLAG_MMIO)
	45	writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
	46	else
	47	outb(cmd, hwif->io_ports.command_addr);
	48	}
	49	EXPORT_SYMBOL_GPL(ide_exec_command);
	50
	51	u8 ide_read_status(ide_hwif_t *hwif)
	52	{
	53	if (hwif->host_flags & IDE_HFLAG_MMIO)
	54	return readb((void __iomem *)hwif->io_ports.status_addr);
	55	else
	56	return inb(hwif->io_ports.status_addr);
	57	}
	58	EXPORT_SYMBOL_GPL(ide_read_status);
	59
	60	u8 ide_read_altstatus(ide_hwif_t *hwif)
	61	{
	62	if (hwif->host_flags & IDE_HFLAG_MMIO)
	63	return readb((void __iomem *)hwif->io_ports.ctl_addr);
	64	else
	65	return inb(hwif->io_ports.ctl_addr);
	66	}
	67	EXPORT_SYMBOL_GPL(ide_read_altstatus);
	68
ecf3a31d	69	void ide_write_devctl(ide_hwif_t *hwif, u8 ctl)
1574cf6c	70	{
1574cf6c BZ	71	if (hwif->host_flags & IDE_HFLAG_MMIO)
	72	writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
	73	else
	74	outb(ctl, hwif->io_ports.ctl_addr);
	75	}
ecf3a31d	76	EXPORT_SYMBOL_GPL(ide_write_devctl);
1574cf6c	77
abb596b2 SS	78	void ide_dev_select(ide_drive_t *drive)
	79	{
	80	ide_hwif_t *hwif = drive->hwif;
	81	u8 select = drive->select \| ATA_DEVICE_OBS;
	82
	83	if (hwif->host_flags & IDE_HFLAG_MMIO)
	84	writeb(select, (void __iomem *)hwif->io_ports.device_addr);
	85	else
	86	outb(select, hwif->io_ports.device_addr);
	87	}
	88	EXPORT_SYMBOL_GPL(ide_dev_select);
	89
c9ff9e7b	90	void ide_tf_load(ide_drive_t drive, struct ide_taskfile tf, u8 valid)
1574cf6c BZ	91	{
	92	ide_hwif_t *hwif = drive->hwif;
	93	struct ide_io_ports *io_ports = &hwif->io_ports;
1574cf6c BZ	94	void (*tf_outb)(u8 addr, unsigned long port);
1574cf6c BZ	95	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
1574cf6c BZ	96
	97	if (mmio)
	98	tf_outb = ide_mm_outb;
	99	else
	100	tf_outb = ide_outb;
	101
60f85019	102	if (valid & IDE_VALID_FEATURE)
1574cf6c	103	tf_outb(tf->feature, io_ports->feature_addr);
60f85019	104	if (valid & IDE_VALID_NSECT)
1574cf6c	105	tf_outb(tf->nsect, io_ports->nsect_addr);
60f85019	106	if (valid & IDE_VALID_LBAL)
1574cf6c	107	tf_outb(tf->lbal, io_ports->lbal_addr);
60f85019	108	if (valid & IDE_VALID_LBAM)
1574cf6c	109	tf_outb(tf->lbam, io_ports->lbam_addr);
60f85019	110	if (valid & IDE_VALID_LBAH)
1574cf6c	111	tf_outb(tf->lbah, io_ports->lbah_addr);
60f85019	112	if (valid & IDE_VALID_DEVICE)
4109d19a	113	tf_outb(tf->device, io_ports->device_addr);
1574cf6c BZ	114	}
	115	EXPORT_SYMBOL_GPL(ide_tf_load);
	116
3153c26b	117	void ide_tf_read(ide_drive_t drive, struct ide_taskfile tf, u8 valid)
1574cf6c BZ	118	{
	119	ide_hwif_t *hwif = drive->hwif;
	120	struct ide_io_ports *io_ports = &hwif->io_ports;
1574cf6c BZ	121	u8 (*tf_inb)(unsigned long port);
	122	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
	123
30881b9a	124	if (mmio)
1574cf6c	125	tf_inb = ide_mm_inb;
30881b9a	126	else
1574cf6c	127	tf_inb = ide_inb;
1574cf6c	128
60f85019	129	if (valid & IDE_VALID_ERROR)
67625119	130	tf->error = tf_inb(io_ports->feature_addr);
60f85019	131	if (valid & IDE_VALID_NSECT)
1574cf6c	132	tf->nsect = tf_inb(io_ports->nsect_addr);
60f85019	133	if (valid & IDE_VALID_LBAL)
1574cf6c	134	tf->lbal = tf_inb(io_ports->lbal_addr);
60f85019	135	if (valid & IDE_VALID_LBAM)
1574cf6c	136	tf->lbam = tf_inb(io_ports->lbam_addr);
60f85019	137	if (valid & IDE_VALID_LBAH)
1574cf6c	138	tf->lbah = tf_inb(io_ports->lbah_addr);
60f85019	139	if (valid & IDE_VALID_DEVICE)
1574cf6c	140	tf->device = tf_inb(io_ports->device_addr);
1574cf6c BZ	141	}
	142	EXPORT_SYMBOL_GPL(ide_tf_read);
	143
	144	/*
	145	* Some localbus EIDE interfaces require a special access sequence
	146	* when using 32-bit I/O instructions to transfer data. We call this
	147	* the "vlb_sync" sequence, which consists of three successive reads
	148	* of the sector count register location, with interrupts disabled
	149	* to ensure that the reads all happen together.
	150	*/
	151	static void ata_vlb_sync(unsigned long port)
	152	{
	153	(void)inb(port);
	154	(void)inb(port);
	155	(void)inb(port);
	156	}
	157
	158	/*
	159	* This is used for most PIO data transfers from the IDE interface
	160	*
	161	* These routines will round up any request for an odd number of bytes,
	162	* so if an odd len is specified, be sure that there's at least one
	163	* extra byte allocated for the buffer.
	164	*/
adb1af98	165	void ide_input_data(ide_drive_t drive, struct ide_cmd cmd, void *buf,
1574cf6c BZ	166	unsigned int len)
	167	{
	168	ide_hwif_t *hwif = drive->hwif;
	169	struct ide_io_ports *io_ports = &hwif->io_ports;
	170	unsigned long data_addr = io_ports->data_addr;
deae17fd	171	unsigned int words = (len + 1) >> 1;
1574cf6c BZ	172	u8 io_32bit = drive->io_32bit;
	173	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
	174
1574cf6c BZ	175	if (io_32bit) {
	176	unsigned long uninitialized_var(flags);
	177
	178	if ((io_32bit & 2) && !mmio) {
	179	local_irq_save(flags);
	180	ata_vlb_sync(io_ports->nsect_addr);
	181	}
	182
deae17fd	183	words >>= 1;
1574cf6c	184	if (mmio)
deae17fd	185	__ide_mm_insl((void __iomem *)data_addr, buf, words);
1574cf6c	186	else
deae17fd	187	insl(data_addr, buf, words);
1574cf6c BZ	188
	189	if ((io_32bit & 2) && !mmio)
	190	local_irq_restore(flags);
	191
deae17fd SS	192	if (((len + 1) & 3) < 2)
	193	return;
	194
	195	buf += len & ~3;
	196	words = 1;
1574cf6c	197	}
deae17fd SS	198
	199	if (mmio)
	200	__ide_mm_insw((void __iomem *)data_addr, buf, words);
	201	else
	202	insw(data_addr, buf, words);
1574cf6c BZ	203	}
	204	EXPORT_SYMBOL_GPL(ide_input_data);
	205
	206	/*
	207	* This is used for most PIO data transfers to the IDE interface
	208	*/
adb1af98	209	void ide_output_data(ide_drive_t drive, struct ide_cmd cmd, void *buf,
1574cf6c BZ	210	unsigned int len)
	211	{
	212	ide_hwif_t *hwif = drive->hwif;
	213	struct ide_io_ports *io_ports = &hwif->io_ports;
	214	unsigned long data_addr = io_ports->data_addr;
deae17fd	215	unsigned int words = (len + 1) >> 1;
1574cf6c BZ	216	u8 io_32bit = drive->io_32bit;
	217	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
	218
1574cf6c BZ	219	if (io_32bit) {
	220	unsigned long uninitialized_var(flags);
	221
	222	if ((io_32bit & 2) && !mmio) {
	223	local_irq_save(flags);
	224	ata_vlb_sync(io_ports->nsect_addr);
	225	}
	226
deae17fd	227	words >>= 1;
1574cf6c	228	if (mmio)
deae17fd	229	__ide_mm_outsl((void __iomem *)data_addr, buf, words);
1574cf6c	230	else
deae17fd	231	outsl(data_addr, buf, words);
1574cf6c BZ	232
	233	if ((io_32bit & 2) && !mmio)
	234	local_irq_restore(flags);
	235
deae17fd SS	236	if (((len + 1) & 3) < 2)
	237	return;
	238
	239	buf += len & ~3;
	240	words = 1;
1574cf6c	241	}
deae17fd SS	242
	243	if (mmio)
	244	__ide_mm_outsw((void __iomem *)data_addr, buf, words);
	245	else
	246	outsw(data_addr, buf, words);
1574cf6c BZ	247	}
	248	EXPORT_SYMBOL_GPL(ide_output_data);
	249
	250	const struct ide_tp_ops default_tp_ops = {
	251	.exec_command = ide_exec_command,
	252	.read_status = ide_read_status,
	253	.read_altstatus = ide_read_altstatus,
ecf3a31d	254	.write_devctl = ide_write_devctl,
1574cf6c	255
abb596b2	256	.dev_select = ide_dev_select,
1574cf6c BZ	257	.tf_load = ide_tf_load,
	258	.tf_read = ide_tf_read,
	259
	260	.input_data = ide_input_data,
	261	.output_data = ide_output_data,
	262	};