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u-boot/common/cmd_ide.c

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/*
* (C) Copyright 2000-2011
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* IDE support
*/
#include <common.h>
#include <config.h>
#include <watchdog.h>
#include <command.h>
#include <image.h>
#include <asm/byteorder.h>
#include <asm/io.h>
#if defined(CONFIG_IDE_8xx_DIRECT) || defined(CONFIG_IDE_PCMCIA)
# include <pcmcia.h>
#endif
#include <ide.h>
#include <ata.h>
#ifdef CONFIG_STATUS_LED
# include <status_led.h>
#endif
#ifdef __PPC__
# define EIEIO __asm__ volatile ("eieio")
# define SYNC __asm__ volatile ("sync")
#else
# define EIEIO /* nothing */
# define SYNC /* nothing */
#endif
/* ------------------------------------------------------------------------- */
/* Current I/O Device */
static int curr_device = -1;
/* Current offset for IDE0 / IDE1 bus access */
ulong ide_bus_offset[CONFIG_SYS_IDE_MAXBUS] = {
#if defined(CONFIG_SYS_ATA_IDE0_OFFSET)
CONFIG_SYS_ATA_IDE0_OFFSET,
#endif
#if defined(CONFIG_SYS_ATA_IDE1_OFFSET) && (CONFIG_SYS_IDE_MAXBUS > 1)
CONFIG_SYS_ATA_IDE1_OFFSET,
#endif
};
static int ide_bus_ok[CONFIG_SYS_IDE_MAXBUS];
block_dev_desc_t ide_dev_desc[CONFIG_SYS_IDE_MAXDEVICE];
/* ------------------------------------------------------------------------- */
#ifdef CONFIG_IDE_RESET
static void ide_reset (void);
#else
#define ide_reset() /* dummy */
#endif
static void ide_ident (block_dev_desc_t *dev_desc);
static uchar ide_wait (int dev, ulong t);
#define IDE_TIME_OUT 2000 /* 2 sec timeout */
#define ATAPI_TIME_OUT 7000 /* 7 sec timeout (5 sec seems to work...) */
#define IDE_SPIN_UP_TIME_OUT 5000 /* 5 sec spin-up timeout */
static void ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len);
#ifndef CONFIG_SYS_ATA_PORT_ADDR
#define CONFIG_SYS_ATA_PORT_ADDR(port) (port)
#endif
#ifdef CONFIG_ATAPI
static void atapi_inquiry(block_dev_desc_t *dev_desc);
static ulong atapi_read(int device, ulong blknr, lbaint_t blkcnt,
void *buffer);
#endif
/* ------------------------------------------------------------------------- */
int do_ide(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
int rcode = 0;
switch (argc) {
case 0:
case 1:
return CMD_RET_USAGE;
case 2:
if (strncmp(argv[1], "res", 3) == 0) {
puts("\nReset IDE"
#ifdef CONFIG_IDE_8xx_DIRECT
" on PCMCIA " PCMCIA_SLOT_MSG
#endif
": ");
ide_init();
return 0;
} else if (strncmp(argv[1], "inf", 3) == 0) {
int i;
putc('\n');
for (i = 0; i < CONFIG_SYS_IDE_MAXDEVICE; ++i) {
if (ide_dev_desc[i].type == DEV_TYPE_UNKNOWN)
continue; /* list only known devices */
printf("IDE device %d: ", i);
dev_print(&ide_dev_desc[i]);
}
return 0;
} else if (strncmp(argv[1], "dev", 3) == 0) {
if ((curr_device < 0)
|| (curr_device >= CONFIG_SYS_IDE_MAXDEVICE)) {
puts("\nno IDE devices available\n");
return 1;
}
printf("\nIDE device %d: ", curr_device);
dev_print(&ide_dev_desc[curr_device]);
return 0;
} else if (strncmp(argv[1], "part", 4) == 0) {
int dev, ok;
for (ok = 0, dev = 0;
dev < CONFIG_SYS_IDE_MAXDEVICE;
++dev) {
if (ide_dev_desc[dev].part_type !=
PART_TYPE_UNKNOWN) {
++ok;
if (dev)
putc('\n');
print_part(&ide_dev_desc[dev]);
}
}
if (!ok) {
puts("\nno IDE devices available\n");
rcode++;
}
return rcode;
}
return CMD_RET_USAGE;
case 3:
if (strncmp(argv[1], "dev", 3) == 0) {
int dev = (int) simple_strtoul(argv[2], NULL, 10);
printf("\nIDE device %d: ", dev);
if (dev >= CONFIG_SYS_IDE_MAXDEVICE) {
puts("unknown device\n");
return 1;
}
dev_print(&ide_dev_desc[dev]);
/*ide_print (dev); */
if (ide_dev_desc[dev].type == DEV_TYPE_UNKNOWN)
return 1;
curr_device = dev;
puts("... is now current device\n");
return 0;
} else if (strncmp(argv[1], "part", 4) == 0) {
int dev = (int) simple_strtoul(argv[2], NULL, 10);
if (ide_dev_desc[dev].part_type != PART_TYPE_UNKNOWN) {
print_part(&ide_dev_desc[dev]);
} else {
printf("\nIDE device %d not available\n",
dev);
rcode = 1;
}
return rcode;
}
return CMD_RET_USAGE;
default:
/* at least 4 args */
if (strcmp(argv[1], "read") == 0) {
ulong addr = simple_strtoul(argv[2], NULL, 16);
ulong cnt = simple_strtoul(argv[4], NULL, 16);
ulong n;
#ifdef CONFIG_SYS_64BIT_LBA
lbaint_t blk = simple_strtoull(argv[3], NULL, 16);
printf("\nIDE read: device %d block # %lld, count %ld ... ",
curr_device, blk, cnt);
#else
lbaint_t blk = simple_strtoul(argv[3], NULL, 16);
printf("\nIDE read: device %d block # %ld, count %ld ... ",
curr_device, blk, cnt);
#endif
n = ide_dev_desc[curr_device].block_read(curr_device,
blk, cnt,
(ulong *)addr);
/* flush cache after read */
flush_cache(addr,
cnt * ide_dev_desc[curr_device].blksz);
printf("%ld blocks read: %s\n",
n, (n == cnt) ? "OK" : "ERROR");
if (n == cnt)
return 0;
else
return 1;
} else if (strcmp(argv[1], "write") == 0) {
ulong addr = simple_strtoul(argv[2], NULL, 16);
ulong cnt = simple_strtoul(argv[4], NULL, 16);
ulong n;
#ifdef CONFIG_SYS_64BIT_LBA
lbaint_t blk = simple_strtoull(argv[3], NULL, 16);
printf("\nIDE write: device %d block # %lld, count %ld ... ",
curr_device, blk, cnt);
#else
lbaint_t blk = simple_strtoul(argv[3], NULL, 16);
printf("\nIDE write: device %d block # %ld, count %ld ... ",
curr_device, blk, cnt);
#endif
n = ide_write(curr_device, blk, cnt, (ulong *) addr);
printf("%ld blocks written: %s\n",
n, (n == cnt) ? "OK" : "ERROR");
if (n == cnt)
return 0;
else
return 1;
} else {
return CMD_RET_USAGE;
}
return rcode;
}
}
int do_diskboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
return common_diskboot(cmdtp, "ide", argc, argv);
}
/* ------------------------------------------------------------------------- */
void __ide_led(uchar led, uchar status)
{
#if defined(CONFIG_IDE_LED) && defined(PER8_BASE) /* required by LED_PORT */
static uchar led_buffer; /* Buffer for current LED status */
uchar *led_port = LED_PORT;
if (status) /* switch LED on */
led_buffer |= led;
else /* switch LED off */
led_buffer &= ~led;
*led_port = led_buffer;
#endif
}
void ide_led(uchar led, uchar status)
__attribute__ ((weak, alias("__ide_led")));
#ifndef CONFIG_IDE_LED /* define LED macros, they are not used anyways */
# define DEVICE_LED(x) 0
# define LED_IDE1 1
# define LED_IDE2 2
#endif
/* ------------------------------------------------------------------------- */
inline void __ide_outb(int dev, int port, unsigned char val)
{
debug("ide_outb (dev= %d, port= 0x%x, val= 0x%02x) : @ 0x%08lx\n",
dev, port, val,
(ATA_CURR_BASE(dev) + CONFIG_SYS_ATA_PORT_ADDR(port)));
#if defined(CONFIG_IDE_AHB)
if (port) {
/* write command */
ide_write_register(dev, port, val);
} else {
/* write data */
outb(val, (ATA_CURR_BASE(dev)));
}
#else
outb(val, (ATA_CURR_BASE(dev) + CONFIG_SYS_ATA_PORT_ADDR(port)));
#endif
}
void ide_outb(int dev, int port, unsigned char val)
__attribute__ ((weak, alias("__ide_outb")));
inline unsigned char __ide_inb(int dev, int port)
{
uchar val;
#if defined(CONFIG_IDE_AHB)
val = ide_read_register(dev, port);
#else
val = inb((ATA_CURR_BASE(dev) + CONFIG_SYS_ATA_PORT_ADDR(port)));
#endif
debug("ide_inb (dev= %d, port= 0x%x) : @ 0x%08lx -> 0x%02x\n",
dev, port,
(ATA_CURR_BASE(dev) + CONFIG_SYS_ATA_PORT_ADDR(port)), val);
return val;
}
unsigned char ide_inb(int dev, int port)
__attribute__ ((weak, alias("__ide_inb")));
#ifdef CONFIG_TUNE_PIO
inline int __ide_set_piomode(int pio_mode)
{
return 0;
}
inline int ide_set_piomode(int pio_mode)
__attribute__ ((weak, alias("__ide_set_piomode")));
#endif
void ide_init(void)
{
unsigned char c;
int i, bus;
#ifdef CONFIG_IDE_8xx_PCCARD
extern int ide_devices_found; /* Initialized in check_ide_device() */
#endif /* CONFIG_IDE_8xx_PCCARD */
#ifdef CONFIG_IDE_PREINIT
WATCHDOG_RESET();
if (ide_preinit()) {
puts("ide_preinit failed\n");
return;
}
#endif /* CONFIG_IDE_PREINIT */
WATCHDOG_RESET();
/*
* Reset the IDE just to be sure.
* Light LED's to show
*/
ide_led((LED_IDE1 | LED_IDE2), 1); /* LED's on */
/* ATAPI Drives seems to need a proper IDE Reset */
ide_reset();
#ifdef CONFIG_IDE_INIT_POSTRESET
WATCHDOG_RESET();
if (ide_init_postreset()) {
puts("ide_preinit_postreset failed\n");
return;
}
#endif /* CONFIG_IDE_INIT_POSTRESET */
/*
* Wait for IDE to get ready.
* According to spec, this can take up to 31 seconds!
*/
for (bus = 0; bus < CONFIG_SYS_IDE_MAXBUS; ++bus) {
int dev =
bus * (CONFIG_SYS_IDE_MAXDEVICE /
CONFIG_SYS_IDE_MAXBUS);
#ifdef CONFIG_IDE_8xx_PCCARD
/* Skip non-ide devices from probing */
if ((ide_devices_found & (1 << bus)) == 0) {
ide_led((LED_IDE1 | LED_IDE2), 0); /* LED's off */
continue;
}
#endif
printf("Bus %d: ", bus);
ide_bus_ok[bus] = 0;
/* Select device
*/
udelay(100000); /* 100 ms */
ide_outb(dev, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(dev));
udelay(100000); /* 100 ms */
i = 0;
do {
udelay(10000); /* 10 ms */
c = ide_inb(dev, ATA_STATUS);
i++;
if (i > (ATA_RESET_TIME * 100)) {
puts("** Timeout **\n");
/* LED's off */
ide_led((LED_IDE1 | LED_IDE2), 0);
return;
}
if ((i >= 100) && ((i % 100) == 0))
putc('.');
} while (c & ATA_STAT_BUSY);
if (c & (ATA_STAT_BUSY | ATA_STAT_FAULT)) {
puts("not available ");
debug("Status = 0x%02X ", c);
#ifndef CONFIG_ATAPI /* ATAPI Devices do not set DRDY */
} else if ((c & ATA_STAT_READY) == 0) {
puts("not available ");
debug("Status = 0x%02X ", c);
#endif
} else {
puts("OK ");
ide_bus_ok[bus] = 1;
}
WATCHDOG_RESET();
}
putc('\n');
ide_led((LED_IDE1 | LED_IDE2), 0); /* LED's off */
curr_device = -1;
for (i = 0; i < CONFIG_SYS_IDE_MAXDEVICE; ++i) {
int led = (IDE_BUS(i) == 0) ? LED_IDE1 : LED_IDE2;
ide_dev_desc[i].type = DEV_TYPE_UNKNOWN;
ide_dev_desc[i].if_type = IF_TYPE_IDE;
ide_dev_desc[i].dev = i;
ide_dev_desc[i].part_type = PART_TYPE_UNKNOWN;
ide_dev_desc[i].blksz = 0;
ide_dev_desc[i].log2blksz =
LOG2_INVALID(typeof(ide_dev_desc[i].log2blksz));
ide_dev_desc[i].lba = 0;
ide_dev_desc[i].block_read = ide_read;
ide_dev_desc[i].block_write = ide_write;
if (!ide_bus_ok[IDE_BUS(i)])
continue;
ide_led(led, 1); /* LED on */
ide_ident(&ide_dev_desc[i]);
ide_led(led, 0); /* LED off */
dev_print(&ide_dev_desc[i]);
if ((ide_dev_desc[i].lba > 0) && (ide_dev_desc[i].blksz > 0)) {
/* initialize partition type */
init_part(&ide_dev_desc[i]);
if (curr_device < 0)
curr_device = i;
}
}
WATCHDOG_RESET();
}
/* ------------------------------------------------------------------------- */
#ifdef CONFIG_PARTITIONS
block_dev_desc_t *ide_get_dev(int dev)
{
return (dev < CONFIG_SYS_IDE_MAXDEVICE) ? &ide_dev_desc[dev] : NULL;
}
#endif
/* ------------------------------------------------------------------------- */
void ide_input_swap_data(int dev, ulong *sect_buf, int words)
__attribute__ ((weak, alias("__ide_input_swap_data")));
void ide_input_data(int dev, ulong *sect_buf, int words)
__attribute__ ((weak, alias("__ide_input_data")));
void ide_output_data(int dev, const ulong *sect_buf, int words)
__attribute__ ((weak, alias("__ide_output_data")));
/* We only need to swap data if we are running on a big endian cpu. */
#if defined(__LITTLE_ENDIAN)
void __ide_input_swap_data(int dev, ulong *sect_buf, int words)
{
ide_input_data(dev, sect_buf, words);
}
#else
void __ide_input_swap_data(int dev, ulong *sect_buf, int words)
{
volatile ushort *pbuf =
(ushort *) (ATA_CURR_BASE(dev) + ATA_DATA_REG);
ushort *dbuf = (ushort *) sect_buf;
debug("in input swap data base for read is %lx\n",
(unsigned long) pbuf);
while (words--) {
#ifdef __MIPS__
*dbuf++ = swab16p((u16 *) pbuf);
*dbuf++ = swab16p((u16 *) pbuf);
#else
*dbuf++ = ld_le16(pbuf);
*dbuf++ = ld_le16(pbuf);
#endif /* !MIPS */
}
}
#endif /* __LITTLE_ENDIAN */
#if defined(CONFIG_IDE_SWAP_IO)
void __ide_output_data(int dev, const ulong *sect_buf, int words)
{
ushort *dbuf;
volatile ushort *pbuf;
pbuf = (ushort *) (ATA_CURR_BASE(dev) + ATA_DATA_REG);
dbuf = (ushort *) sect_buf;
while (words--) {
EIEIO;
*pbuf = *dbuf++;
EIEIO;
*pbuf = *dbuf++;
}
}
#else /* ! CONFIG_IDE_SWAP_IO */
void __ide_output_data(int dev, const ulong *sect_buf, int words)
{
#if defined(CONFIG_IDE_AHB)
ide_write_data(dev, sect_buf, words);
#else
outsw(ATA_CURR_BASE(dev) + ATA_DATA_REG, sect_buf, words << 1);
#endif
}
#endif /* CONFIG_IDE_SWAP_IO */
#if defined(CONFIG_IDE_SWAP_IO)
void __ide_input_data(int dev, ulong *sect_buf, int words)
{
ushort *dbuf;
volatile ushort *pbuf;
pbuf = (ushort *) (ATA_CURR_BASE(dev) + ATA_DATA_REG);
dbuf = (ushort *) sect_buf;
debug("in input data base for read is %lx\n", (unsigned long) pbuf);
while (words--) {
EIEIO;
*dbuf++ = *pbuf;
EIEIO;
*dbuf++ = *pbuf;
}
}
#else /* ! CONFIG_IDE_SWAP_IO */
void __ide_input_data(int dev, ulong *sect_buf, int words)
{
#if defined(CONFIG_IDE_AHB)
ide_read_data(dev, sect_buf, words);
#else
insw(ATA_CURR_BASE(dev) + ATA_DATA_REG, sect_buf, words << 1);
#endif
}
#endif /* CONFIG_IDE_SWAP_IO */
/* -------------------------------------------------------------------------
*/
static void ide_ident(block_dev_desc_t *dev_desc)
{
unsigned char c;
hd_driveid_t iop;
#ifdef CONFIG_ATAPI
int retries = 0;
#endif
#ifdef CONFIG_TUNE_PIO
int pio_mode;
#endif
#if 0
int mode, cycle_time;
#endif
int device;
device = dev_desc->dev;
printf(" Device %d: ", device);
ide_led(DEVICE_LED(device), 1); /* LED on */
/* Select device
*/
ide_outb(device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
dev_desc->if_type = IF_TYPE_IDE;
#ifdef CONFIG_ATAPI
retries = 0;
/* Warning: This will be tricky to read */
while (retries <= 1) {
/* check signature */
if ((ide_inb(device, ATA_SECT_CNT) == 0x01) &&
(ide_inb(device, ATA_SECT_NUM) == 0x01) &&
(ide_inb(device, ATA_CYL_LOW) == 0x14) &&
(ide_inb(device, ATA_CYL_HIGH) == 0xEB)) {
/* ATAPI Signature found */
dev_desc->if_type = IF_TYPE_ATAPI;
/*
* Start Ident Command
*/
ide_outb(device, ATA_COMMAND, ATAPI_CMD_IDENT);
/*
* Wait for completion - ATAPI devices need more time
* to become ready
*/
c = ide_wait(device, ATAPI_TIME_OUT);
} else
#endif
{
/*
* Start Ident Command
*/
ide_outb(device, ATA_COMMAND, ATA_CMD_IDENT);
/*
* Wait for completion
*/
c = ide_wait(device, IDE_TIME_OUT);
}
ide_led(DEVICE_LED(device), 0); /* LED off */
if (((c & ATA_STAT_DRQ) == 0) ||
((c & (ATA_STAT_FAULT | ATA_STAT_ERR)) != 0)) {
#ifdef CONFIG_ATAPI
{
/*
* Need to soft reset the device
* in case it's an ATAPI...
*/
debug("Retrying...\n");
ide_outb(device, ATA_DEV_HD,
ATA_LBA | ATA_DEVICE(device));
udelay(100000);
ide_outb(device, ATA_COMMAND, 0x08);
udelay(500000); /* 500 ms */
}
/*
* Select device
*/
ide_outb(device, ATA_DEV_HD,
ATA_LBA | ATA_DEVICE(device));
retries++;
#else
return;
#endif
}
#ifdef CONFIG_ATAPI
else
break;
} /* see above - ugly to read */
if (retries == 2) /* Not found */
return;
#endif
ide_input_swap_data(device, (ulong *)&iop, ATA_SECTORWORDS);
ident_cpy((unsigned char *) dev_desc->revision, iop.fw_rev,
sizeof(dev_desc->revision));
ident_cpy((unsigned char *) dev_desc->vendor, iop.model,
sizeof(dev_desc->vendor));
ident_cpy((unsigned char *) dev_desc->product, iop.serial_no,
sizeof(dev_desc->product));
#ifdef __LITTLE_ENDIAN
/*
* firmware revision, model, and serial number have Big Endian Byte
* order in Word. Convert all three to little endian.
*
* See CF+ and CompactFlash Specification Revision 2.0:
* 6.2.1.6: Identify Drive, Table 39 for more details
*/
strswab(dev_desc->revision);
strswab(dev_desc->vendor);
strswab(dev_desc->product);
#endif /* __LITTLE_ENDIAN */
if ((iop.config & 0x0080) == 0x0080)
dev_desc->removable = 1;
else
dev_desc->removable = 0;
#ifdef CONFIG_TUNE_PIO
/* Mode 0 - 2 only, are directly determined by word 51. */
pio_mode = iop.tPIO;
if (pio_mode > 2) {
printf("WARNING: Invalid PIO (word 51 = %d).\n", pio_mode);
/* Force it to dead slow, and hope for the best... */
pio_mode = 0;
}
/* Any CompactFlash Storage Card that supports PIO mode 3 or above
* shall set bit 1 of word 53 to one and support the fields contained
* in words 64 through 70.
*/
if (iop.field_valid & 0x02) {
/*
* Mode 3 and above are possible. Check in order from slow
* to fast, so we wind up with the highest mode allowed.
*/
if (iop.eide_pio_modes & 0x01)
pio_mode = 3;
if (iop.eide_pio_modes & 0x02)
pio_mode = 4;
if (ata_id_is_cfa((u16 *)&iop)) {
if ((iop.cf_advanced_caps & 0x07) == 0x01)
pio_mode = 5;
if ((iop.cf_advanced_caps & 0x07) == 0x02)
pio_mode = 6;
}
}
/* System-specific, depends on bus speeds, etc. */
ide_set_piomode(pio_mode);
#endif /* CONFIG_TUNE_PIO */
#if 0
/*
* Drive PIO mode autoselection
*/
mode = iop.tPIO;
printf("tPIO = 0x%02x = %d\n", mode, mode);
if (mode > 2) { /* 2 is maximum allowed tPIO value */
mode = 2;
debug("Override tPIO -> 2\n");
}
if (iop.field_valid & 2) { /* drive implements ATA2? */
debug("Drive implements ATA2\n");
if (iop.capability & 8) { /* drive supports use_iordy? */
cycle_time = iop.eide_pio_iordy;
} else {
cycle_time = iop.eide_pio;
}
debug("cycle time = %d\n", cycle_time);
mode = 4;
if (cycle_time > 120)
mode = 3; /* 120 ns for PIO mode 4 */
if (cycle_time > 180)
mode = 2; /* 180 ns for PIO mode 3 */
if (cycle_time > 240)
mode = 1; /* 240 ns for PIO mode 4 */
if (cycle_time > 383)
mode = 0; /* 383 ns for PIO mode 4 */
}
printf("PIO mode to use: PIO %d\n", mode);
#endif /* 0 */
#ifdef CONFIG_ATAPI
if (dev_desc->if_type == IF_TYPE_ATAPI) {
atapi_inquiry(dev_desc);
return;
}
#endif /* CONFIG_ATAPI */
#ifdef __BIG_ENDIAN
/* swap shorts */
dev_desc->lba = (iop.lba_capacity << 16) | (iop.lba_capacity >> 16);
#else /* ! __BIG_ENDIAN */
/*
* do not swap shorts on little endian
*
* See CF+ and CompactFlash Specification Revision 2.0:
* 6.2.1.6: Identfy Drive, Table 39, Word Address 57-58 for details.
*/
dev_desc->lba = iop.lba_capacity;
#endif /* __BIG_ENDIAN */
#ifdef CONFIG_LBA48
if (iop.command_set_2 & 0x0400) { /* LBA 48 support */
dev_desc->lba48 = 1;
dev_desc->lba = (unsigned long long) iop.lba48_capacity[0] |
((unsigned long long) iop.lba48_capacity[1] << 16) |
((unsigned long long) iop.lba48_capacity[2] << 32) |
((unsigned long long) iop.lba48_capacity[3] << 48);
} else {
dev_desc->lba48 = 0;
}
#endif /* CONFIG_LBA48 */
/* assuming HD */
dev_desc->type = DEV_TYPE_HARDDISK;
dev_desc->blksz = ATA_BLOCKSIZE;
dev_desc->log2blksz = LOG2(dev_desc->blksz);
dev_desc->lun = 0; /* just to fill something in... */
#if 0 /* only used to test the powersaving mode,
* if enabled, the drive goes after 5 sec
* in standby mode */
ide_outb(device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
c = ide_wait(device, IDE_TIME_OUT);
ide_outb(device, ATA_SECT_CNT, 1);
ide_outb(device, ATA_LBA_LOW, 0);
ide_outb(device, ATA_LBA_MID, 0);
ide_outb(device, ATA_LBA_HIGH, 0);
ide_outb(device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
ide_outb(device, ATA_COMMAND, 0xe3);
udelay(50);
c = ide_wait(device, IDE_TIME_OUT); /* can't take over 500 ms */
#endif
}
/* ------------------------------------------------------------------------- */
ulong ide_read(int device, lbaint_t blknr, lbaint_t blkcnt, void *buffer)
{
ulong n = 0;
unsigned char c;
unsigned char pwrsave = 0; /* power save */
#ifdef CONFIG_LBA48
unsigned char lba48 = 0;
if (blknr & 0x0000fffff0000000ULL) {
/* more than 28 bits used, use 48bit mode */
lba48 = 1;
}
#endif
debug("ide_read dev %d start " LBAF ", blocks " LBAF " buffer at %lX\n",
device, blknr, blkcnt, (ulong) buffer);
ide_led(DEVICE_LED(device), 1); /* LED on */
/* Select device
*/
ide_outb(device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
c = ide_wait(device, IDE_TIME_OUT);
if (c & ATA_STAT_BUSY) {
printf("IDE read: device %d not ready\n", device);
goto IDE_READ_E;
}
/* first check if the drive is in Powersaving mode, if yes,
* increase the timeout value */
ide_outb(device, ATA_COMMAND, ATA_CMD_CHK_PWR);
udelay(50);
c = ide_wait(device, IDE_TIME_OUT); /* can't take over 500 ms */
if (c & ATA_STAT_BUSY) {
printf("IDE read: device %d not ready\n", device);
goto IDE_READ_E;
}
if ((c & ATA_STAT_ERR) == ATA_STAT_ERR) {
printf("No Powersaving mode %X\n", c);
} else {
c = ide_inb(device, ATA_SECT_CNT);
debug("Powersaving %02X\n", c);
if (c == 0)
pwrsave = 1;
}
while (blkcnt-- > 0) {
c = ide_wait(device, IDE_TIME_OUT);
if (c & ATA_STAT_BUSY) {
printf("IDE read: device %d not ready\n", device);
break;
}
#ifdef CONFIG_LBA48
if (lba48) {
/* write high bits */
ide_outb(device, ATA_SECT_CNT, 0);
ide_outb(device, ATA_LBA_LOW, (blknr >> 24) & 0xFF);
#ifdef CONFIG_SYS_64BIT_LBA
ide_outb(device, ATA_LBA_MID, (blknr >> 32) & 0xFF);
ide_outb(device, ATA_LBA_HIGH, (blknr >> 40) & 0xFF);
#else
ide_outb(device, ATA_LBA_MID, 0);
ide_outb(device, ATA_LBA_HIGH, 0);
#endif
}
#endif
ide_outb(device, ATA_SECT_CNT, 1);
ide_outb(device, ATA_LBA_LOW, (blknr >> 0) & 0xFF);
ide_outb(device, ATA_LBA_MID, (blknr >> 8) & 0xFF);
ide_outb(device, ATA_LBA_HIGH, (blknr >> 16) & 0xFF);
#ifdef CONFIG_LBA48
if (lba48) {
ide_outb(device, ATA_DEV_HD,
ATA_LBA | ATA_DEVICE(device));
ide_outb(device, ATA_COMMAND, ATA_CMD_READ_EXT);
} else
#endif
{
ide_outb(device, ATA_DEV_HD, ATA_LBA |
ATA_DEVICE(device) | ((blknr >> 24) & 0xF));
ide_outb(device, ATA_COMMAND, ATA_CMD_READ);
}
udelay(50);
if (pwrsave) {
/* may take up to 4 sec */
c = ide_wait(device, IDE_SPIN_UP_TIME_OUT);
pwrsave = 0;
} else {
/* can't take over 500 ms */
c = ide_wait(device, IDE_TIME_OUT);
}
if ((c & (ATA_STAT_DRQ | ATA_STAT_BUSY | ATA_STAT_ERR)) !=
ATA_STAT_DRQ) {
printf("Error (no IRQ) dev %d blk " LBAF ": status "
"%#02x\n", device, blknr, c);
break;
}
ide_input_data(device, buffer, ATA_SECTORWORDS);
(void) ide_inb(device, ATA_STATUS); /* clear IRQ */
++n;
++blknr;
buffer += ATA_BLOCKSIZE;
}
IDE_READ_E:
ide_led(DEVICE_LED(device), 0); /* LED off */
return (n);
}
/* ------------------------------------------------------------------------- */
ulong ide_write(int device, lbaint_t blknr, lbaint_t blkcnt, const void *buffer)
{
ulong n = 0;
unsigned char c;
#ifdef CONFIG_LBA48
unsigned char lba48 = 0;
if (blknr & 0x0000fffff0000000ULL) {
/* more than 28 bits used, use 48bit mode */
lba48 = 1;
}
#endif
ide_led(DEVICE_LED(device), 1); /* LED on */
/* Select device
*/
ide_outb(device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
while (blkcnt-- > 0) {
c = ide_wait(device, IDE_TIME_OUT);
if (c & ATA_STAT_BUSY) {
printf("IDE read: device %d not ready\n", device);
goto WR_OUT;
}
#ifdef CONFIG_LBA48
if (lba48) {
/* write high bits */
ide_outb(device, ATA_SECT_CNT, 0);
ide_outb(device, ATA_LBA_LOW, (blknr >> 24) & 0xFF);
#ifdef CONFIG_SYS_64BIT_LBA
ide_outb(device, ATA_LBA_MID, (blknr >> 32) & 0xFF);
ide_outb(device, ATA_LBA_HIGH, (blknr >> 40) & 0xFF);
#else
ide_outb(device, ATA_LBA_MID, 0);
ide_outb(device, ATA_LBA_HIGH, 0);
#endif
}
#endif
ide_outb(device, ATA_SECT_CNT, 1);
ide_outb(device, ATA_LBA_LOW, (blknr >> 0) & 0xFF);
ide_outb(device, ATA_LBA_MID, (blknr >> 8) & 0xFF);
ide_outb(device, ATA_LBA_HIGH, (blknr >> 16) & 0xFF);
#ifdef CONFIG_LBA48
if (lba48) {
ide_outb(device, ATA_DEV_HD,
ATA_LBA | ATA_DEVICE(device));
ide_outb(device, ATA_COMMAND, ATA_CMD_WRITE_EXT);
} else
#endif
{
ide_outb(device, ATA_DEV_HD, ATA_LBA |
ATA_DEVICE(device) | ((blknr >> 24) & 0xF));
ide_outb(device, ATA_COMMAND, ATA_CMD_WRITE);
}
udelay(50);
/* can't take over 500 ms */
c = ide_wait(device, IDE_TIME_OUT);
if ((c & (ATA_STAT_DRQ | ATA_STAT_BUSY | ATA_STAT_ERR)) !=
ATA_STAT_DRQ) {
printf("Error (no IRQ) dev %d blk " LBAF ": status "
"%#02x\n", device, blknr, c);
goto WR_OUT;
}
ide_output_data(device, buffer, ATA_SECTORWORDS);
c = ide_inb(device, ATA_STATUS); /* clear IRQ */
++n;
++blknr;
buffer += ATA_BLOCKSIZE;
}
WR_OUT:
ide_led(DEVICE_LED(device), 0); /* LED off */
return (n);
}
/* ------------------------------------------------------------------------- */
/*
* copy src to dest, skipping leading and trailing blanks and null
* terminate the string
* "len" is the size of available memory including the terminating '\0'
*/
static void ident_cpy(unsigned char *dst, unsigned char *src,
unsigned int len)
{
unsigned char *end, *last;
last = dst;
end = src + len - 1;
/* reserve space for '\0' */
if (len < 2)
goto OUT;
/* skip leading white space */
while ((*src) && (src < end) && (*src == ' '))
++src;
/* copy string, omitting trailing white space */
while ((*src) && (src < end)) {
*dst++ = *src;
if (*src++ != ' ')
last = dst;
}
OUT:
*last = '\0';
}
/* ------------------------------------------------------------------------- */
/*
* Wait until Busy bit is off, or timeout (in ms)
* Return last status
*/
static uchar ide_wait(int dev, ulong t)
{
ulong delay = 10 * t; /* poll every 100 us */
uchar c;
while ((c = ide_inb(dev, ATA_STATUS)) & ATA_STAT_BUSY) {
udelay(100);
if (delay-- == 0)
break;
}
return (c);
}
/* ------------------------------------------------------------------------- */
#ifdef CONFIG_IDE_RESET
extern void ide_set_reset(int idereset);
static void ide_reset(void)
{
int i;
curr_device = -1;
for (i = 0; i < CONFIG_SYS_IDE_MAXBUS; ++i)
ide_bus_ok[i] = 0;
for (i = 0; i < CONFIG_SYS_IDE_MAXDEVICE; ++i)
ide_dev_desc[i].type = DEV_TYPE_UNKNOWN;
ide_set_reset(1); /* assert reset */
/* the reset signal shall be asserted for et least 25 us */
udelay(25);
WATCHDOG_RESET();
/* de-assert RESET signal */
ide_set_reset(0);
/* wait 250 ms */
for (i = 0; i < 250; ++i)
udelay(1000);
}
#endif /* CONFIG_IDE_RESET */
/* ------------------------------------------------------------------------- */
#if defined(CONFIG_OF_IDE_FIXUP)
int ide_device_present(int dev)
{
if (dev >= CONFIG_SYS_IDE_MAXBUS)
return 0;
return (ide_dev_desc[dev].type == DEV_TYPE_UNKNOWN ? 0 : 1);
}
#endif
/* ------------------------------------------------------------------------- */
#ifdef CONFIG_ATAPI
/****************************************************************************
* ATAPI Support
*/
void ide_input_data_shorts(int dev, ushort *sect_buf, int shorts)
__attribute__ ((weak, alias("__ide_input_data_shorts")));
void ide_output_data_shorts(int dev, ushort *sect_buf, int shorts)
__attribute__ ((weak, alias("__ide_output_data_shorts")));
#if defined(CONFIG_IDE_SWAP_IO)
/* since ATAPI may use commands with not 4 bytes alligned length
* we have our own transfer functions, 2 bytes alligned */
void __ide_output_data_shorts(int dev, ushort *sect_buf, int shorts)
{
ushort *dbuf;
volatile ushort *pbuf;
pbuf = (ushort *) (ATA_CURR_BASE(dev) + ATA_DATA_REG);
dbuf = (ushort *) sect_buf;
debug("in output data shorts base for read is %lx\n",
(unsigned long) pbuf);
while (shorts--) {
EIEIO;
*pbuf = *dbuf++;
}
}
void __ide_input_data_shorts(int dev, ushort *sect_buf, int shorts)
{
ushort *dbuf;
volatile ushort *pbuf;
pbuf = (ushort *) (ATA_CURR_BASE(dev) + ATA_DATA_REG);
dbuf = (ushort *) sect_buf;
debug("in input data shorts base for read is %lx\n",
(unsigned long) pbuf);
while (shorts--) {
EIEIO;
*dbuf++ = *pbuf;
}
}
#else /* ! CONFIG_IDE_SWAP_IO */
void __ide_output_data_shorts(int dev, ushort *sect_buf, int shorts)
{
outsw(ATA_CURR_BASE(dev) + ATA_DATA_REG, sect_buf, shorts);
}
void __ide_input_data_shorts(int dev, ushort *sect_buf, int shorts)
{
insw(ATA_CURR_BASE(dev) + ATA_DATA_REG, sect_buf, shorts);
}
#endif /* CONFIG_IDE_SWAP_IO */
/*
* Wait until (Status & mask) == res, or timeout (in ms)
* Return last status
* This is used since some ATAPI CD ROMs clears their Busy Bit first
* and then they set their DRQ Bit
*/
static uchar atapi_wait_mask(int dev, ulong t, uchar mask, uchar res)
{
ulong delay = 10 * t; /* poll every 100 us */
uchar c;
/* prevents to read the status before valid */
c = ide_inb(dev, ATA_DEV_CTL);
while (((c = ide_inb(dev, ATA_STATUS)) & mask) != res) {
/* break if error occurs (doesn't make sense to wait more) */
if ((c & ATA_STAT_ERR) == ATA_STAT_ERR)
break;
udelay(100);
if (delay-- == 0)
break;
}
return (c);
}
/*
* issue an atapi command
*/
unsigned char atapi_issue(int device, unsigned char *ccb, int ccblen,
unsigned char *buffer, int buflen)
{
unsigned char c, err, mask, res;
int n;
ide_led(DEVICE_LED(device), 1); /* LED on */
/* Select device
*/
mask = ATA_STAT_BUSY | ATA_STAT_DRQ;
res = 0;
ide_outb(device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
c = atapi_wait_mask(device, ATAPI_TIME_OUT, mask, res);
if ((c & mask) != res) {
printf("ATAPI_ISSUE: device %d not ready status %X\n", device,
c);
err = 0xFF;
goto AI_OUT;
}
/* write taskfile */
ide_outb(device, ATA_ERROR_REG, 0); /* no DMA, no overlaped */
ide_outb(device, ATA_SECT_CNT, 0);
ide_outb(device, ATA_SECT_NUM, 0);
ide_outb(device, ATA_CYL_LOW, (unsigned char) (buflen & 0xFF));
ide_outb(device, ATA_CYL_HIGH,
(unsigned char) ((buflen >> 8) & 0xFF));
ide_outb(device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
ide_outb(device, ATA_COMMAND, ATAPI_CMD_PACKET);
udelay(50);
mask = ATA_STAT_DRQ | ATA_STAT_BUSY | ATA_STAT_ERR;
res = ATA_STAT_DRQ;
c = atapi_wait_mask(device, ATAPI_TIME_OUT, mask, res);
if ((c & mask) != res) { /* DRQ must be 1, BSY 0 */
printf("ATAPI_ISSUE: Error (no IRQ) before sending ccb dev %d status 0x%02x\n",
device, c);
err = 0xFF;
goto AI_OUT;
}
/* write command block */
ide_output_data_shorts(device, (unsigned short *) ccb, ccblen / 2);
/* ATAPI Command written wait for completition */
udelay(5000); /* device must set bsy */
mask = ATA_STAT_DRQ | ATA_STAT_BUSY | ATA_STAT_ERR;
/*
* if no data wait for DRQ = 0 BSY = 0
* if data wait for DRQ = 1 BSY = 0
*/
res = 0;
if (buflen)
res = ATA_STAT_DRQ;
c = atapi_wait_mask(device, ATAPI_TIME_OUT, mask, res);
if ((c & mask) != res) {
if (c & ATA_STAT_ERR) {
err = (ide_inb(device, ATA_ERROR_REG)) >> 4;
debug("atapi_issue 1 returned sense key %X status %02X\n",
err, c);
} else {
printf("ATAPI_ISSUE: (no DRQ) after sending ccb (%x) status 0x%02x\n",
ccb[0], c);
err = 0xFF;
}
goto AI_OUT;
}
n = ide_inb(device, ATA_CYL_HIGH);
n <<= 8;
n += ide_inb(device, ATA_CYL_LOW);
if (n > buflen) {
printf("ERROR, transfer bytes %d requested only %d\n", n,
buflen);
err = 0xff;
goto AI_OUT;
}
if ((n == 0) && (buflen < 0)) {
printf("ERROR, transfer bytes %d requested %d\n", n, buflen);
err = 0xff;
goto AI_OUT;
}
if (n != buflen) {
debug("WARNING, transfer bytes %d not equal with requested %d\n",
n, buflen);
}
if (n != 0) { /* data transfer */
debug("ATAPI_ISSUE: %d Bytes to transfer\n", n);
/* we transfer shorts */
n >>= 1;
/* ok now decide if it is an in or output */
if ((ide_inb(device, ATA_SECT_CNT) & 0x02) == 0) {
debug("Write to device\n");
ide_output_data_shorts(device,
(unsigned short *) buffer, n);
} else {
debug("Read from device @ %p shorts %d\n", buffer, n);
ide_input_data_shorts(device,
(unsigned short *) buffer, n);
}
}
udelay(5000); /* seems that some CD ROMs need this... */
mask = ATA_STAT_BUSY | ATA_STAT_ERR;
res = 0;
c = atapi_wait_mask(device, ATAPI_TIME_OUT, mask, res);
if ((c & ATA_STAT_ERR) == ATA_STAT_ERR) {
err = (ide_inb(device, ATA_ERROR_REG) >> 4);
debug("atapi_issue 2 returned sense key %X status %X\n", err,
c);
} else {
err = 0;
}
AI_OUT:
ide_led(DEVICE_LED(device), 0); /* LED off */
return (err);
}
/*
* sending the command to atapi_issue. If an status other than good
* returns, an request_sense will be issued
*/
#define ATAPI_DRIVE_NOT_READY 100
#define ATAPI_UNIT_ATTN 10
unsigned char atapi_issue_autoreq(int device,
unsigned char *ccb,
int ccblen,
unsigned char *buffer, int buflen)
{
unsigned char sense_data[18], sense_ccb[12];
unsigned char res, key, asc, ascq;
int notready, unitattn;
unitattn = ATAPI_UNIT_ATTN;
notready = ATAPI_DRIVE_NOT_READY;
retry:
res = atapi_issue(device, ccb, ccblen, buffer, buflen);
if (res == 0)
return 0; /* Ok */
if (res == 0xFF)
return 0xFF; /* error */
debug("(auto_req)atapi_issue returned sense key %X\n", res);
memset(sense_ccb, 0, sizeof(sense_ccb));
memset(sense_data, 0, sizeof(sense_data));
sense_ccb[0] = ATAPI_CMD_REQ_SENSE;
sense_ccb[4] = 18; /* allocation Length */
res = atapi_issue(device, sense_ccb, 12, sense_data, 18);
key = (sense_data[2] & 0xF);
asc = (sense_data[12]);
ascq = (sense_data[13]);
debug("ATAPI_CMD_REQ_SENSE returned %x\n", res);
debug(" Sense page: %02X key %02X ASC %02X ASCQ %02X\n",
sense_data[0], key, asc, ascq);
if ((key == 0))
return 0; /* ok device ready */
if ((key == 6) || (asc == 0x29) || (asc == 0x28)) { /* Unit Attention */
if (unitattn-- > 0) {
udelay(200 * 1000);
goto retry;
}
printf("Unit Attention, tried %d\n", ATAPI_UNIT_ATTN);
goto error;
}
if ((asc == 0x4) && (ascq == 0x1)) {
/* not ready, but will be ready soon */
if (notready-- > 0) {
udelay(200 * 1000);
goto retry;
}
printf("Drive not ready, tried %d times\n",
ATAPI_DRIVE_NOT_READY);
goto error;
}
if (asc == 0x3a) {
debug("Media not present\n");
goto error;
}
printf("ERROR: Unknown Sense key %02X ASC %02X ASCQ %02X\n", key, asc,
ascq);
error:
debug("ERROR Sense key %02X ASC %02X ASCQ %02X\n", key, asc, ascq);
return (0xFF);
}
static void atapi_inquiry(block_dev_desc_t *dev_desc)
{
unsigned char ccb[12]; /* Command descriptor block */
unsigned char iobuf[64]; /* temp buf */
unsigned char c;
int device;
device = dev_desc->dev;
dev_desc->type = DEV_TYPE_UNKNOWN; /* not yet valid */
dev_desc->block_read = atapi_read;
memset(ccb, 0, sizeof(ccb));
memset(iobuf, 0, sizeof(iobuf));
ccb[0] = ATAPI_CMD_INQUIRY;
ccb[4] = 40; /* allocation Legnth */
c = atapi_issue_autoreq(device, ccb, 12, (unsigned char *) iobuf, 40);
debug("ATAPI_CMD_INQUIRY returned %x\n", c);
if (c != 0)
return;
/* copy device ident strings */
ident_cpy((unsigned char *) dev_desc->vendor, &iobuf[8], 8);
ident_cpy((unsigned char *) dev_desc->product, &iobuf[16], 16);
ident_cpy((unsigned char *) dev_desc->revision, &iobuf[32], 5);
dev_desc->lun = 0;
dev_desc->lba = 0;
dev_desc->blksz = 0;
dev_desc->log2blksz = LOG2_INVALID(typeof(dev_desc->log2blksz));
dev_desc->type = iobuf[0] & 0x1f;
if ((iobuf[1] & 0x80) == 0x80)
dev_desc->removable = 1;
else
dev_desc->removable = 0;
memset(ccb, 0, sizeof(ccb));
memset(iobuf, 0, sizeof(iobuf));
ccb[0] = ATAPI_CMD_START_STOP;
ccb[4] = 0x03; /* start */
c = atapi_issue_autoreq(device, ccb, 12, (unsigned char *) iobuf, 0);
debug("ATAPI_CMD_START_STOP returned %x\n", c);
if (c != 0)
return;
memset(ccb, 0, sizeof(ccb));
memset(iobuf, 0, sizeof(iobuf));
c = atapi_issue_autoreq(device, ccb, 12, (unsigned char *) iobuf, 0);
debug("ATAPI_CMD_UNIT_TEST_READY returned %x\n", c);
if (c != 0)
return;
memset(ccb, 0, sizeof(ccb));
memset(iobuf, 0, sizeof(iobuf));
ccb[0] = ATAPI_CMD_READ_CAP;
c = atapi_issue_autoreq(device, ccb, 12, (unsigned char *) iobuf, 8);
debug("ATAPI_CMD_READ_CAP returned %x\n", c);
if (c != 0)
return;
debug("Read Cap: LBA %02X%02X%02X%02X blksize %02X%02X%02X%02X\n",
iobuf[0], iobuf[1], iobuf[2], iobuf[3],
iobuf[4], iobuf[5], iobuf[6], iobuf[7]);
dev_desc->lba = ((unsigned long) iobuf[0] << 24) +
((unsigned long) iobuf[1] << 16) +
((unsigned long) iobuf[2] << 8) + ((unsigned long) iobuf[3]);
dev_desc->blksz = ((unsigned long) iobuf[4] << 24) +
((unsigned long) iobuf[5] << 16) +
((unsigned long) iobuf[6] << 8) + ((unsigned long) iobuf[7]);
dev_desc->log2blksz = LOG2(dev_desc->blksz);
#ifdef CONFIG_LBA48
/* ATAPI devices cannot use 48bit addressing (ATA/ATAPI v7) */
dev_desc->lba48 = 0;
#endif
return;
}
/*
* atapi_read:
* we transfer only one block per command, since the multiple DRQ per
* command is not yet implemented
*/
#define ATAPI_READ_MAX_BYTES 2048 /* we read max 2kbytes */
#define ATAPI_READ_BLOCK_SIZE 2048 /* assuming CD part */
#define ATAPI_READ_MAX_BLOCK (ATAPI_READ_MAX_BYTES/ATAPI_READ_BLOCK_SIZE)
ulong atapi_read(int device, ulong blknr, lbaint_t blkcnt, void *buffer)
{
ulong n = 0;
unsigned char ccb[12]; /* Command descriptor block */
ulong cnt;
debug("atapi_read dev %d start %lX, blocks " LBAF " buffer at %lX\n",
device, blknr, blkcnt, (ulong) buffer);
do {
if (blkcnt > ATAPI_READ_MAX_BLOCK)
cnt = ATAPI_READ_MAX_BLOCK;
else
cnt = blkcnt;
ccb[0] = ATAPI_CMD_READ_12;
ccb[1] = 0; /* reserved */
ccb[2] = (unsigned char) (blknr >> 24) & 0xFF; /* MSB Block */
ccb[3] = (unsigned char) (blknr >> 16) & 0xFF; /* */
ccb[4] = (unsigned char) (blknr >> 8) & 0xFF;
ccb[5] = (unsigned char) blknr & 0xFF; /* LSB Block */
ccb[6] = (unsigned char) (cnt >> 24) & 0xFF; /* MSB Block cnt */
ccb[7] = (unsigned char) (cnt >> 16) & 0xFF;
ccb[8] = (unsigned char) (cnt >> 8) & 0xFF;
ccb[9] = (unsigned char) cnt & 0xFF; /* LSB Block */
ccb[10] = 0; /* reserved */
ccb[11] = 0; /* reserved */
if (atapi_issue_autoreq(device, ccb, 12,
(unsigned char *) buffer,
cnt * ATAPI_READ_BLOCK_SIZE)
== 0xFF) {
return (n);
}
n += cnt;
blkcnt -= cnt;
blknr += cnt;
buffer += (cnt * ATAPI_READ_BLOCK_SIZE);
} while (blkcnt > 0);
return (n);
}
/* ------------------------------------------------------------------------- */
#endif /* CONFIG_ATAPI */
U_BOOT_CMD(ide, 5, 1, do_ide,
"IDE sub-system",
"reset - reset IDE controller\n"
"ide info - show available IDE devices\n"
"ide device [dev] - show or set current device\n"
"ide part [dev] - print partition table of one or all IDE devices\n"
"ide read addr blk# cnt\n"
"ide write addr blk# cnt - read/write `cnt'"
" blocks starting at block `blk#'\n"
" to/from memory address `addr'");
U_BOOT_CMD(diskboot, 3, 1, do_diskboot,
"boot from IDE device", "loadAddr dev:part");
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