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linux-sg2042/drivers/ide/ide-io-std.c

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#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_set_irq(ide_hwif_t *hwif, int on)
{
u8 ctl = ATA_DEVCTL_OBS;
if (on == 4) { /* hack for SRST */
ctl |= 4;
on &= ~4;
}
ctl |= on ? 0 : 2;
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_set_irq);
void ide_tf_load(ide_drive_t *drive, struct ide_cmd *cmd)
{
ide_hwif_t *hwif = drive->hwif;
struct ide_io_ports *io_ports = &hwif->io_ports;
struct ide_taskfile *tf = &cmd->tf;
void (*tf_outb)(u8 addr, unsigned long port);
u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
if (mmio)
tf_outb = ide_mm_outb;
else
tf_outb = ide_outb;
if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
HIHI = 0xFF;
if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
u16 data = (tf->hob_data << 8) | tf->data;
if (mmio)
writew(data, (void __iomem *)io_ports->data_addr);
else
outw(data, io_ports->data_addr);
}
if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
tf_outb(tf->hob_feature, io_ports->feature_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
tf_outb(tf->hob_nsect, io_ports->nsect_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
tf_outb(tf->hob_lbal, io_ports->lbal_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
tf_outb(tf->hob_lbam, io_ports->lbam_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
tf_outb(tf->hob_lbah, io_ports->lbah_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_FEATURE)
tf_outb(tf->feature, io_ports->feature_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_NSECT)
tf_outb(tf->nsect, io_ports->nsect_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_LBAL)
tf_outb(tf->lbal, io_ports->lbal_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_LBAM)
tf_outb(tf->lbam, io_ports->lbam_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_LBAH)
tf_outb(tf->lbah, io_ports->lbah_addr);
if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE)
tf_outb((tf->device & HIHI) | drive->select,
io_ports->device_addr);
}
EXPORT_SYMBOL_GPL(ide_tf_load);
void ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
{
ide_hwif_t *hwif = drive->hwif;
struct ide_io_ports *io_ports = &hwif->io_ports;
struct ide_taskfile *tf = &cmd->tf;
void (*tf_outb)(u8 addr, unsigned long port);
u8 (*tf_inb)(unsigned long port);
u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
if (mmio) {
tf_outb = ide_mm_outb;
tf_inb = ide_mm_inb;
} else {
tf_outb = ide_outb;
tf_inb = ide_inb;
}
if (cmd->ftf_flags & IDE_FTFLAG_IN_DATA) {
u16 data;
if (mmio)
data = readw((void __iomem *)io_ports->data_addr);
else
data = inw(io_ports->data_addr);
tf->data = data & 0xff;
tf->hob_data = (data >> 8) & 0xff;
}
/* be sure we're looking at the low order bits */
tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_FEATURE)
tf->feature = tf_inb(io_ports->feature_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
tf->nsect = tf_inb(io_ports->nsect_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
tf->lbal = tf_inb(io_ports->lbal_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_LBAM)
tf->lbam = tf_inb(io_ports->lbam_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_LBAH)
tf->lbah = tf_inb(io_ports->lbah_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_DEVICE)
tf->device = tf_inb(io_ports->device_addr);
if (cmd->tf_flags & IDE_TFLAG_LBA48) {
tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
tf->hob_feature = tf_inb(io_ports->feature_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
tf->hob_nsect = tf_inb(io_ports->nsect_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
tf->hob_lbal = tf_inb(io_ports->lbal_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
tf->hob_lbam = tf_inb(io_ports->lbam_addr);
if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
tf->hob_lbah = tf_inb(io_ports->lbah_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;
u8 io_32bit = drive->io_32bit;
u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
len++;
if (io_32bit) {
unsigned long uninitialized_var(flags);
if ((io_32bit & 2) && !mmio) {
local_irq_save(flags);
ata_vlb_sync(io_ports->nsect_addr);
}
if (mmio)
__ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
else
insl(data_addr, buf, len / 4);
if ((io_32bit & 2) && !mmio)
local_irq_restore(flags);
if ((len & 3) >= 2) {
if (mmio)
__ide_mm_insw((void __iomem *)data_addr,
(u8 *)buf + (len & ~3), 1);
else
insw(data_addr, (u8 *)buf + (len & ~3), 1);
}
} else {
if (mmio)
__ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
else
insw(data_addr, buf, len / 2);
}
}
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;
u8 io_32bit = drive->io_32bit;
u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
len++;
if (io_32bit) {
unsigned long uninitialized_var(flags);
if ((io_32bit & 2) && !mmio) {
local_irq_save(flags);
ata_vlb_sync(io_ports->nsect_addr);
}
if (mmio)
__ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
else
outsl(data_addr, buf, len / 4);
if ((io_32bit & 2) && !mmio)
local_irq_restore(flags);
if ((len & 3) >= 2) {
if (mmio)
__ide_mm_outsw((void __iomem *)data_addr,
(u8 *)buf + (len & ~3), 1);
else
outsw(data_addr, (u8 *)buf + (len & ~3), 1);
}
} else {
if (mmio)
__ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
else
outsw(data_addr, buf, len / 2);
}
}
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,
.set_irq = ide_set_irq,
.tf_load = ide_tf_load,
.tf_read = ide_tf_read,
.input_data = ide_input_data,
.output_data = ide_output_data,
};
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