[people/ms/u-boot.git] / common / scsi.c

/*
 * (C) Copyright 2001
 * Denis Peter, MPL AG Switzerland
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <dm.h>
#include <inttypes.h>
#include <pci.h>
#include <scsi.h>
#include <dm/device-internal.h>
#include <dm/uclass-internal.h>

#if !defined(CONFIG_DM_SCSI)
#ifdef CONFIG_SCSI_DEV_LIST
#define SCSI_DEV_LIST CONFIG_SCSI_DEV_LIST
#else
#ifdef CONFIG_SCSI_SYM53C8XX
#define SCSI_VEND_ID	0x1000
#ifndef CONFIG_SCSI_DEV_ID
#define SCSI_DEV_ID		0x0001
#else
#define SCSI_DEV_ID		CONFIG_SCSI_DEV_ID
#endif
#elif defined CONFIG_SATA_ULI5288

#define SCSI_VEND_ID 0x10b9
#define SCSI_DEV_ID  0x5288

#elif !defined(CONFIG_SCSI_AHCI_PLAT)
#error no scsi device defined
#endif
#define SCSI_DEV_LIST {SCSI_VEND_ID, SCSI_DEV_ID}
#endif
#endif

#if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT)
const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
#endif
static ccb tempccb;	/* temporary scsi command buffer */

static unsigned char tempbuff[512]; /* temporary data buffer */

#if !defined(CONFIG_DM_SCSI)
static int scsi_max_devs; /* number of highest available scsi device */

static int scsi_curr_dev; /* current device */

static struct blk_desc scsi_dev_desc[CONFIG_SYS_SCSI_MAX_DEVICE];
#endif

/* almost the maximum amount of the scsi_ext command.. */
#define SCSI_MAX_READ_BLK 0xFFFF
#define SCSI_LBA48_READ	0xFFFFFFF

#ifdef CONFIG_SYS_64BIT_LBA
void scsi_setup_read16(ccb *pccb, lbaint_t start, unsigned long blocks)
{
	pccb->cmd[0] = SCSI_READ16;
	pccb->cmd[1] = pccb->lun << 5;
	pccb->cmd[2] = (unsigned char)(start >> 56) & 0xff;
	pccb->cmd[3] = (unsigned char)(start >> 48) & 0xff;
	pccb->cmd[4] = (unsigned char)(start >> 40) & 0xff;
	pccb->cmd[5] = (unsigned char)(start >> 32) & 0xff;
	pccb->cmd[6] = (unsigned char)(start >> 24) & 0xff;
	pccb->cmd[7] = (unsigned char)(start >> 16) & 0xff;
	pccb->cmd[8] = (unsigned char)(start >> 8) & 0xff;
	pccb->cmd[9] = (unsigned char)start & 0xff;
	pccb->cmd[10] = 0;
	pccb->cmd[11] = (unsigned char)(blocks >> 24) & 0xff;
	pccb->cmd[12] = (unsigned char)(blocks >> 16) & 0xff;
	pccb->cmd[13] = (unsigned char)(blocks >> 8) & 0xff;
	pccb->cmd[14] = (unsigned char)blocks & 0xff;
	pccb->cmd[15] = 0;
	pccb->cmdlen = 16;
	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
	debug("scsi_setup_read16: cmd: %02X %02X startblk %02X%02X%02X%02X%02X%02X%02X%02X blccnt %02X%02X%02X%02X\n",
	      pccb->cmd[0], pccb->cmd[1],
	      pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
	      pccb->cmd[6], pccb->cmd[7], pccb->cmd[8], pccb->cmd[9],
	      pccb->cmd[11], pccb->cmd[12], pccb->cmd[13], pccb->cmd[14]);
}
#endif

static void scsi_setup_read_ext(ccb *pccb, lbaint_t start,
				unsigned short blocks)
{
	pccb->cmd[0] = SCSI_READ10;
	pccb->cmd[1] = pccb->lun << 5;
	pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
	pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
	pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
	pccb->cmd[5] = (unsigned char)start & 0xff;
	pccb->cmd[6] = 0;
	pccb->cmd[7] = (unsigned char)(blocks >> 8) & 0xff;
	pccb->cmd[8] = (unsigned char)blocks & 0xff;
	pccb->cmd[6] = 0;
	pccb->cmdlen = 10;
	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
	debug("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
	      pccb->cmd[0], pccb->cmd[1],
	      pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
	      pccb->cmd[7], pccb->cmd[8]);
}

static void scsi_setup_write_ext(ccb *pccb, lbaint_t start,
				 unsigned short blocks)
{
	pccb->cmd[0] = SCSI_WRITE10;
	pccb->cmd[1] = pccb->lun << 5;
	pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
	pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
	pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
	pccb->cmd[5] = (unsigned char)start & 0xff;
	pccb->cmd[6] = 0;
	pccb->cmd[7] = ((unsigned char)(blocks >> 8)) & 0xff;
	pccb->cmd[8] = (unsigned char)blocks & 0xff;
	pccb->cmd[9] = 0;
	pccb->cmdlen = 10;
	pccb->msgout[0] = SCSI_IDENTIFY;  /* NOT USED */
	debug("%s: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
	      __func__,
	      pccb->cmd[0], pccb->cmd[1],
	      pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
	      pccb->cmd[7], pccb->cmd[8]);
}

static void scsi_setup_inquiry(ccb *pccb)
{
	pccb->cmd[0] = SCSI_INQUIRY;
	pccb->cmd[1] = pccb->lun << 5;
	pccb->cmd[2] = 0;
	pccb->cmd[3] = 0;
	if (pccb->datalen > 255)
		pccb->cmd[4] = 255;
	else
		pccb->cmd[4] = (unsigned char)pccb->datalen;
	pccb->cmd[5] = 0;
	pccb->cmdlen = 6;
	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
}

#ifdef CONFIG_BLK
static ulong scsi_read(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
		       void *buffer)
#else
static ulong scsi_read(struct blk_desc *block_dev, lbaint_t blknr,
		       lbaint_t blkcnt, void *buffer)
#endif
{
#ifdef CONFIG_BLK
	struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
#endif
	lbaint_t start, blks;
	uintptr_t buf_addr;
	unsigned short smallblks = 0;
	ccb *pccb = (ccb *)&tempccb;

	/* Setup device */
	pccb->target = block_dev->target;
	pccb->lun = block_dev->lun;
	buf_addr = (unsigned long)buffer;
	start = blknr;
	blks = blkcnt;
	debug("\nscsi_read: dev %d startblk " LBAF
	      ", blccnt " LBAF " buffer %lx\n",
	      block_dev->devnum, start, blks, (unsigned long)buffer);
	do {
		pccb->pdata = (unsigned char *)buf_addr;
#ifdef CONFIG_SYS_64BIT_LBA
		if (start > SCSI_LBA48_READ) {
			unsigned long blocks;
			blocks = min_t(lbaint_t, blks, SCSI_MAX_READ_BLK);
			pccb->datalen = block_dev->blksz * blocks;
			scsi_setup_read16(pccb, start, blocks);
			start += blocks;
			blks -= blocks;
		} else
#endif
		if (blks > SCSI_MAX_READ_BLK) {
			pccb->datalen = block_dev->blksz *
				SCSI_MAX_READ_BLK;
			smallblks = SCSI_MAX_READ_BLK;
			scsi_setup_read_ext(pccb, start, smallblks);
			start += SCSI_MAX_READ_BLK;
			blks -= SCSI_MAX_READ_BLK;
		} else {
			pccb->datalen = block_dev->blksz * blks;
			smallblks = (unsigned short)blks;
			scsi_setup_read_ext(pccb, start, smallblks);
			start += blks;
			blks = 0;
		}
		debug("scsi_read_ext: startblk " LBAF
		      ", blccnt %x buffer %" PRIXPTR "\n",
		      start, smallblks, buf_addr);
		if (scsi_exec(pccb) != true) {
			scsi_print_error(pccb);
			blkcnt -= blks;
			break;
		}
		buf_addr += pccb->datalen;
	} while (blks != 0);
	debug("scsi_read_ext: end startblk " LBAF
	      ", blccnt %x buffer %" PRIXPTR "\n", start, smallblks, buf_addr);
	return blkcnt;
}

/*******************************************************************************
 * scsi_write
 */

/* Almost the maximum amount of the scsi_ext command.. */
#define SCSI_MAX_WRITE_BLK 0xFFFF

#ifdef CONFIG_BLK
static ulong scsi_write(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
			const void *buffer)
#else
static ulong scsi_write(struct blk_desc *block_dev, lbaint_t blknr,
			lbaint_t blkcnt, const void *buffer)
#endif
{
#ifdef CONFIG_BLK
	struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
#endif
	lbaint_t start, blks;
	uintptr_t buf_addr;
	unsigned short smallblks;
	ccb *pccb = (ccb *)&tempccb;

	/* Setup device */
	pccb->target = block_dev->target;
	pccb->lun = block_dev->lun;
	buf_addr = (unsigned long)buffer;
	start = blknr;
	blks = blkcnt;
	debug("\n%s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n",
	      __func__, block_dev->devnum, start, blks, (unsigned long)buffer);
	do {
		pccb->pdata = (unsigned char *)buf_addr;
		if (blks > SCSI_MAX_WRITE_BLK) {
			pccb->datalen = (block_dev->blksz *
					 SCSI_MAX_WRITE_BLK);
			smallblks = SCSI_MAX_WRITE_BLK;
			scsi_setup_write_ext(pccb, start, smallblks);
			start += SCSI_MAX_WRITE_BLK;
			blks -= SCSI_MAX_WRITE_BLK;
		} else {
			pccb->datalen = block_dev->blksz * blks;
			smallblks = (unsigned short)blks;
			scsi_setup_write_ext(pccb, start, smallblks);
			start += blks;
			blks = 0;
		}
		debug("%s: startblk " LBAF ", blccnt %x buffer %" PRIXPTR "\n",
		      __func__, start, smallblks, buf_addr);
		if (scsi_exec(pccb) != true) {
			scsi_print_error(pccb);
			blkcnt -= blks;
			break;
		}
		buf_addr += pccb->datalen;
	} while (blks != 0);
	debug("%s: end startblk " LBAF ", blccnt %x buffer %" PRIXPTR "\n",
	      __func__, start, smallblks, buf_addr);
	return blkcnt;
}

#if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT)
void scsi_init(void)
{
	int busdevfunc = -1;
	int i;
	/*
	 * Find a device from the list, this driver will support a single
	 * controller.
	 */
	for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
		/* get PCI Device ID */
#ifdef CONFIG_DM_PCI
		struct udevice *dev;
		int ret;

		ret = dm_pci_find_device(scsi_device_list[i].vendor,
					 scsi_device_list[i].device, 0, &dev);
		if (!ret) {
			busdevfunc = dm_pci_get_bdf(dev);
			break;
		}
#else
		busdevfunc = pci_find_device(scsi_device_list[i].vendor,
					     scsi_device_list[i].device,
					     0);
#endif
		if (busdevfunc != -1)
			break;
	}

	if (busdevfunc == -1) {
		printf("Error: SCSI Controller(s) ");
		for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
			printf("%04X:%04X ",
			       scsi_device_list[i].vendor,
			       scsi_device_list[i].device);
		}
		printf("not found\n");
		return;
	}
#ifdef DEBUG
	else {
		printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",
		       scsi_device_list[i].vendor,
		       scsi_device_list[i].device,
		       (busdevfunc >> 16) & 0xFF,
		       (busdevfunc >> 11) & 0x1F,
		       (busdevfunc >> 8) & 0x7);
	}
#endif
	bootstage_start(BOOTSTAGE_ID_ACCUM_SCSI, "ahci");
	scsi_low_level_init(busdevfunc);
	scsi_scan(1);
	bootstage_accum(BOOTSTAGE_ID_ACCUM_SCSI);
}
#endif

/* copy src to dest, skipping leading and trailing blanks
 * and null terminate the string
 */
static void scsi_ident_cpy(unsigned char *dest, unsigned char *src,
			   unsigned int len)
{
	int start, end;

	start = 0;
	while (start < len) {
		if (src[start] != ' ')
			break;
		start++;
	}
	end = len-1;
	while (end > start) {
		if (src[end] != ' ')
			break;
		end--;
	}
	for (; start <= end; start++)
		*dest ++= src[start];
	*dest = '\0';
}

static int scsi_read_capacity(ccb *pccb, lbaint_t *capacity,
			      unsigned long *blksz)
{
	*capacity = 0;

	memset(pccb->cmd, '\0', sizeof(pccb->cmd));
	pccb->cmd[0] = SCSI_RD_CAPAC10;
	pccb->cmd[1] = pccb->lun << 5;
	pccb->cmdlen = 10;
	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */

	pccb->datalen = 8;
	if (scsi_exec(pccb) != true)
		return 1;

	*capacity = ((lbaint_t)pccb->pdata[0] << 24) |
		    ((lbaint_t)pccb->pdata[1] << 16) |
		    ((lbaint_t)pccb->pdata[2] << 8)  |
		    ((lbaint_t)pccb->pdata[3]);

	if (*capacity != 0xffffffff) {
		/* Read capacity (10) was sufficient for this drive. */
		*blksz = ((unsigned long)pccb->pdata[4] << 24) |
			 ((unsigned long)pccb->pdata[5] << 16) |
			 ((unsigned long)pccb->pdata[6] << 8)  |
			 ((unsigned long)pccb->pdata[7]);
		return 0;
	}

	/* Read capacity (10) was insufficient. Use read capacity (16). */
	memset(pccb->cmd, '\0', sizeof(pccb->cmd));
	pccb->cmd[0] = SCSI_RD_CAPAC16;
	pccb->cmd[1] = 0x10;
	pccb->cmdlen = 16;
	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */

	pccb->datalen = 16;
	if (scsi_exec(pccb) != true)
		return 1;

	*capacity = ((uint64_t)pccb->pdata[0] << 56) |
		    ((uint64_t)pccb->pdata[1] << 48) |
		    ((uint64_t)pccb->pdata[2] << 40) |
		    ((uint64_t)pccb->pdata[3] << 32) |
		    ((uint64_t)pccb->pdata[4] << 24) |
		    ((uint64_t)pccb->pdata[5] << 16) |
		    ((uint64_t)pccb->pdata[6] << 8)  |
		    ((uint64_t)pccb->pdata[7]);

	*blksz = ((uint64_t)pccb->pdata[8]  << 56) |
		 ((uint64_t)pccb->pdata[9]  << 48) |
		 ((uint64_t)pccb->pdata[10] << 40) |
		 ((uint64_t)pccb->pdata[11] << 32) |
		 ((uint64_t)pccb->pdata[12] << 24) |
		 ((uint64_t)pccb->pdata[13] << 16) |
		 ((uint64_t)pccb->pdata[14] << 8)  |
		 ((uint64_t)pccb->pdata[15]);

	return 0;
}


/*
 * Some setup (fill-in) routines
 */
static void scsi_setup_test_unit_ready(ccb *pccb)
{
	pccb->cmd[0] = SCSI_TST_U_RDY;
	pccb->cmd[1] = pccb->lun << 5;
	pccb->cmd[2] = 0;
	pccb->cmd[3] = 0;
	pccb->cmd[4] = 0;
	pccb->cmd[5] = 0;
	pccb->cmdlen = 6;
	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
}

/**
 * scsi_init_dev_desc_priv - initialize only SCSI specific blk_desc properties
 *
 * @dev_desc: Block device description pointer
 */
static void scsi_init_dev_desc_priv(struct blk_desc *dev_desc)
{
	dev_desc->target = 0xff;
	dev_desc->lun = 0xff;
	dev_desc->log2blksz =
		LOG2_INVALID(typeof(dev_desc->log2blksz));
	dev_desc->type = DEV_TYPE_UNKNOWN;
	dev_desc->vendor[0] = 0;
	dev_desc->product[0] = 0;
	dev_desc->revision[0] = 0;
	dev_desc->removable = false;
#ifndef CONFIG_BLK
	dev_desc->block_read = scsi_read;
	dev_desc->block_write = scsi_write;
#endif
}

#if !defined(CONFIG_DM_SCSI)
/**
 * scsi_init_dev_desc - initialize all SCSI specific blk_desc properties
 *
 * @dev_desc: Block device description pointer
 * @devnum: Device number
 */
static void scsi_init_dev_desc(struct blk_desc *dev_desc, int devnum)
{
	dev_desc->lba = 0;
	dev_desc->blksz = 0;
	dev_desc->if_type = IF_TYPE_SCSI;
	dev_desc->devnum = devnum;
	dev_desc->part_type = PART_TYPE_UNKNOWN;

	scsi_init_dev_desc_priv(dev_desc);
}
#endif

/**
 * scsi_detect_dev - Detect scsi device
 *
 * @target: target id
 * @lun: target lun
 * @dev_desc: block device description
 *
 * The scsi_detect_dev detects and fills a dev_desc structure when the device is
 * detected.
 *
 * Return: 0 on success, error value otherwise
 */
static int scsi_detect_dev(int target, int lun, struct blk_desc *dev_desc)
{
	unsigned char perq, modi;
	lbaint_t capacity;
	unsigned long blksz;
	ccb *pccb = (ccb *)&tempccb;

	pccb->target = target;
	pccb->lun = lun;
	pccb->pdata = (unsigned char *)&tempbuff;
	pccb->datalen = 512;
	scsi_setup_inquiry(pccb);
	if (scsi_exec(pccb) != true) {
		if (pccb->contr_stat == SCSI_SEL_TIME_OUT) {
			/*
			  * selection timeout => assuming no
			  * device present
			  */
			debug("Selection timeout ID %d\n",
			      pccb->target);
			return -ETIMEDOUT;
		}
		scsi_print_error(pccb);
		return -ENODEV;
	}
	perq = tempbuff[0];
	modi = tempbuff[1];
	if ((perq & 0x1f) == 0x1f)
		return -ENODEV; /* skip unknown devices */
	if ((modi & 0x80) == 0x80) /* drive is removable */
		dev_desc->removable = true;
	/* get info for this device */
	scsi_ident_cpy((unsigned char *)dev_desc->vendor,
		       &tempbuff[8], 8);
	scsi_ident_cpy((unsigned char *)dev_desc->product,
		       &tempbuff[16], 16);
	scsi_ident_cpy((unsigned char *)dev_desc->revision,
		       &tempbuff[32], 4);
	dev_desc->target = pccb->target;
	dev_desc->lun = pccb->lun;

	pccb->datalen = 0;
	scsi_setup_test_unit_ready(pccb);
	if (scsi_exec(pccb) != true) {
		if (dev_desc->removable) {
			dev_desc->type = perq;
			goto removable;
		}
		scsi_print_error(pccb);
		return -EINVAL;
	}
	if (scsi_read_capacity(pccb, &capacity, &blksz)) {
		scsi_print_error(pccb);
		return -EINVAL;
	}
	dev_desc->lba = capacity;
	dev_desc->blksz = blksz;
	dev_desc->log2blksz = LOG2(dev_desc->blksz);
	dev_desc->type = perq;
removable:
	return 0;
}

/*
 * (re)-scan the scsi bus and reports scsi device info
 * to the user if mode = 1
 */
#if defined(CONFIG_DM_SCSI)
int scsi_scan(int mode)
{
	unsigned char i, lun;
	struct uclass *uc;
	struct udevice *dev; /* SCSI controller */
	int ret;

	if (mode == 1)
		printf("scanning bus for devices...\n");

	blk_unbind_all(IF_TYPE_SCSI);

	ret = uclass_get(UCLASS_SCSI, &uc);
	if (ret)
		return ret;

	uclass_foreach_dev(dev, uc) {
		struct scsi_platdata *plat; /* scsi controller platdata */

		/* probe SCSI controller driver */
		ret = device_probe(dev);
		if (ret)
			return ret;

		/* Get controller platdata */
		plat = dev_get_platdata(dev);

		for (i = 0; i < plat->max_id; i++) {
			for (lun = 0; lun < plat->max_lun; lun++) {
				struct udevice *bdev; /* block device */
				/* block device description */
				struct blk_desc *bdesc;
				char str[10];

				/*
				 * Create only one block device and do detection
				 * to make sure that there won't be a lot of
				 * block devices created
				 */
				snprintf(str, sizeof(str), "id%dlun%d", i, lun);
				ret = blk_create_devicef(dev, "scsi_blk",
							  str, IF_TYPE_SCSI,
							  -1, 0, 0, &bdev);
				if (ret) {
					debug("Can't create device\n");
					return ret;
				}
				bdesc = dev_get_uclass_platdata(bdev);

				scsi_init_dev_desc_priv(bdesc);
				ret = scsi_detect_dev(i, lun, bdesc);
				if (ret) {
					device_unbind(bdev);
					continue;
				}
				part_init(bdesc);

				if (mode == 1) {
					printf("  Device %d: ", 0);
					dev_print(bdesc);
				} /* if mode */
			} /* next LUN */
		}
	}

	return 0;
}
#else
int scsi_scan(int mode)
{
	unsigned char i, lun;
	int ret;

	if (mode == 1)
		printf("scanning bus for devices...\n");
	for (i = 0; i < CONFIG_SYS_SCSI_MAX_DEVICE; i++)
		scsi_init_dev_desc(&scsi_dev_desc[i], i);

	scsi_max_devs = 0;
	for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) {
		for (lun = 0; lun < CONFIG_SYS_SCSI_MAX_LUN; lun++) {
			ret = scsi_detect_dev(i, lun,
					      &scsi_dev_desc[scsi_max_devs]);
			if (ret)
				continue;
			part_init(&scsi_dev_desc[scsi_max_devs]);

			if (mode == 1) {
				printf("  Device %d: ", 0);
				dev_print(&scsi_dev_desc[scsi_max_devs]);
			} /* if mode */
			scsi_max_devs++;
		} /* next LUN */
	}
	if (scsi_max_devs > 0)
		scsi_curr_dev = 0;
	else
		scsi_curr_dev = -1;

	printf("Found %d device(s).\n", scsi_max_devs);
#ifndef CONFIG_SPL_BUILD
	setenv_ulong("scsidevs", scsi_max_devs);
#endif
	return 0;
}
#endif

#ifdef CONFIG_BLK
static const struct blk_ops scsi_blk_ops = {
	.read	= scsi_read,
	.write	= scsi_write,
};

U_BOOT_DRIVER(scsi_blk) = {
	.name		= "scsi_blk",
	.id		= UCLASS_BLK,
	.ops		= &scsi_blk_ops,
};
#else
U_BOOT_LEGACY_BLK(scsi) = {
	.if_typename	= "scsi",
	.if_type	= IF_TYPE_SCSI,
	.max_devs	= CONFIG_SYS_SCSI_MAX_DEVICE,
	.desc		= scsi_dev_desc,
};
#endif
Commit	Line	Data
11f610ed SG	1	/*
	2	* (C) Copyright 2001
	3	* Denis Peter, MPL AG Switzerland
	4	*
	5	* SPDX-License-Identifier: GPL-2.0+
	6	*/
	7
	8	#include <common.h>
535556b2	9	#include <dm.h>
11f610ed SG	10	#include <inttypes.h>
	11	#include <pci.h>
	12	#include <scsi.h>
e8a016b5 MS	13	#include <dm/device-internal.h>
e8a016b5 MS	14	#include <dm/uclass-internal.h>
11f610ed	15
e8a016b5	16	#if !defined(CONFIG_DM_SCSI)
11f610ed SG	17	#ifdef CONFIG_SCSI_DEV_LIST
	18	#define SCSI_DEV_LIST CONFIG_SCSI_DEV_LIST
	19	#else
	20	#ifdef CONFIG_SCSI_SYM53C8XX
	21	#define SCSI_VEND_ID 0x1000
	22	#ifndef CONFIG_SCSI_DEV_ID
	23	#define SCSI_DEV_ID 0x0001
	24	#else
	25	#define SCSI_DEV_ID CONFIG_SCSI_DEV_ID
	26	#endif
	27	#elif defined CONFIG_SATA_ULI5288
	28
	29	#define SCSI_VEND_ID 0x10b9
	30	#define SCSI_DEV_ID 0x5288
	31
	32	#elif !defined(CONFIG_SCSI_AHCI_PLAT)
	33	#error no scsi device defined
	34	#endif
	35	#define SCSI_DEV_LIST {SCSI_VEND_ID, SCSI_DEV_ID}
	36	#endif
e8a016b5	37	#endif
11f610ed SG	38
	39	#if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT)
	40	const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
	41	#endif
	42	static ccb tempccb; /* temporary scsi command buffer */
	43
	44	static unsigned char tempbuff[512]; /* temporary data buffer */
	45
e8a016b5	46	#if !defined(CONFIG_DM_SCSI)
11f610ed SG	47	static int scsi_max_devs; /* number of highest available scsi device */
	48
	49	static int scsi_curr_dev; /* current device */
	50
	51	static struct blk_desc scsi_dev_desc[CONFIG_SYS_SCSI_MAX_DEVICE];
e8a016b5	52	#endif
11f610ed SG	53
	54	/* almost the maximum amount of the scsi_ext command.. */
	55	#define SCSI_MAX_READ_BLK 0xFFFF
	56	#define SCSI_LBA48_READ 0xFFFFFFF
	57
	58	#ifdef CONFIG_SYS_64BIT_LBA
	59	void scsi_setup_read16(ccb *pccb, lbaint_t start, unsigned long blocks)
	60	{
	61	pccb->cmd[0] = SCSI_READ16;
	62	pccb->cmd[1] = pccb->lun << 5;
	63	pccb->cmd[2] = (unsigned char)(start >> 56) & 0xff;
	64	pccb->cmd[3] = (unsigned char)(start >> 48) & 0xff;
	65	pccb->cmd[4] = (unsigned char)(start >> 40) & 0xff;
	66	pccb->cmd[5] = (unsigned char)(start >> 32) & 0xff;
	67	pccb->cmd[6] = (unsigned char)(start >> 24) & 0xff;
	68	pccb->cmd[7] = (unsigned char)(start >> 16) & 0xff;
	69	pccb->cmd[8] = (unsigned char)(start >> 8) & 0xff;
	70	pccb->cmd[9] = (unsigned char)start & 0xff;
	71	pccb->cmd[10] = 0;
	72	pccb->cmd[11] = (unsigned char)(blocks >> 24) & 0xff;
	73	pccb->cmd[12] = (unsigned char)(blocks >> 16) & 0xff;
	74	pccb->cmd[13] = (unsigned char)(blocks >> 8) & 0xff;
	75	pccb->cmd[14] = (unsigned char)blocks & 0xff;
	76	pccb->cmd[15] = 0;
	77	pccb->cmdlen = 16;
	78	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
	79	debug("scsi_setup_read16: cmd: %02X %02X startblk %02X%02X%02X%02X%02X%02X%02X%02X blccnt %02X%02X%02X%02X\n",
	80	pccb->cmd[0], pccb->cmd[1],
	81	pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
	82	pccb->cmd[6], pccb->cmd[7], pccb->cmd[8], pccb->cmd[9],
	83	pccb->cmd[11], pccb->cmd[12], pccb->cmd[13], pccb->cmd[14]);
	84	}
	85	#endif
	86
545a2847 MS	87	static void scsi_setup_read_ext(ccb *pccb, lbaint_t start,
545a2847 MS	88	unsigned short blocks)
11f610ed SG	89	{
	90	pccb->cmd[0] = SCSI_READ10;
	91	pccb->cmd[1] = pccb->lun << 5;
	92	pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
	93	pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
	94	pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
	95	pccb->cmd[5] = (unsigned char)start & 0xff;
	96	pccb->cmd[6] = 0;
	97	pccb->cmd[7] = (unsigned char)(blocks >> 8) & 0xff;
	98	pccb->cmd[8] = (unsigned char)blocks & 0xff;
	99	pccb->cmd[6] = 0;
	100	pccb->cmdlen = 10;
	101	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
	102	debug("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
	103	pccb->cmd[0], pccb->cmd[1],
	104	pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
	105	pccb->cmd[7], pccb->cmd[8]);
	106	}
	107
545a2847 MS	108	static void scsi_setup_write_ext(ccb *pccb, lbaint_t start,
545a2847 MS	109	unsigned short blocks)
11f610ed SG	110	{
	111	pccb->cmd[0] = SCSI_WRITE10;
	112	pccb->cmd[1] = pccb->lun << 5;
	113	pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
	114	pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
	115	pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
	116	pccb->cmd[5] = (unsigned char)start & 0xff;
	117	pccb->cmd[6] = 0;
	118	pccb->cmd[7] = ((unsigned char)(blocks >> 8)) & 0xff;
	119	pccb->cmd[8] = (unsigned char)blocks & 0xff;
	120	pccb->cmd[9] = 0;
	121	pccb->cmdlen = 10;
	122	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
	123	debug("%s: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
	124	__func__,
	125	pccb->cmd[0], pccb->cmd[1],
	126	pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
	127	pccb->cmd[7], pccb->cmd[8]);
	128	}
	129
545a2847	130	static void scsi_setup_inquiry(ccb *pccb)
11f610ed SG	131	{
	132	pccb->cmd[0] = SCSI_INQUIRY;
	133	pccb->cmd[1] = pccb->lun << 5;
	134	pccb->cmd[2] = 0;
	135	pccb->cmd[3] = 0;
	136	if (pccb->datalen > 255)
	137	pccb->cmd[4] = 255;
	138	else
	139	pccb->cmd[4] = (unsigned char)pccb->datalen;
	140	pccb->cmd[5] = 0;
	141	pccb->cmdlen = 6;
	142	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
	143	}
	144
535556b2 SG	145	#ifdef CONFIG_BLK
	146	static ulong scsi_read(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
	147	void *buffer)
	148	#else
11f610ed SG	149	static ulong scsi_read(struct blk_desc *block_dev, lbaint_t blknr,
11f610ed SG	150	lbaint_t blkcnt, void *buffer)
535556b2	151	#endif
11f610ed	152	{
535556b2 SG	153	#ifdef CONFIG_BLK
	154	struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
	155	#endif
11f610ed SG	156	lbaint_t start, blks;
	157	uintptr_t buf_addr;
	158	unsigned short smallblks = 0;
	159	ccb pccb = (ccb )&tempccb;
11f610ed SG	160
11f610ed SG	161	/* Setup device */
cdb93b27 MS	162	pccb->target = block_dev->target;
cdb93b27 MS	163	pccb->lun = block_dev->lun;
11f610ed SG	164	buf_addr = (unsigned long)buffer;
	165	start = blknr;
	166	blks = blkcnt;
	167	debug("\nscsi_read: dev %d startblk " LBAF
	168	", blccnt " LBAF " buffer %lx\n",
cdb93b27	169	block_dev->devnum, start, blks, (unsigned long)buffer);
11f610ed SG	170	do {
	171	pccb->pdata = (unsigned char *)buf_addr;
	172	#ifdef CONFIG_SYS_64BIT_LBA
	173	if (start > SCSI_LBA48_READ) {
	174	unsigned long blocks;
	175	blocks = min_t(lbaint_t, blks, SCSI_MAX_READ_BLK);
cdb93b27	176	pccb->datalen = block_dev->blksz * blocks;
11f610ed SG	177	scsi_setup_read16(pccb, start, blocks);
	178	start += blocks;
	179	blks -= blocks;
	180	} else
	181	#endif
	182	if (blks > SCSI_MAX_READ_BLK) {
cdb93b27	183	pccb->datalen = block_dev->blksz *
11f610ed SG	184	SCSI_MAX_READ_BLK;
	185	smallblks = SCSI_MAX_READ_BLK;
	186	scsi_setup_read_ext(pccb, start, smallblks);
	187	start += SCSI_MAX_READ_BLK;
	188	blks -= SCSI_MAX_READ_BLK;
	189	} else {
cdb93b27	190	pccb->datalen = block_dev->blksz * blks;
11f610ed SG	191	smallblks = (unsigned short)blks;
	192	scsi_setup_read_ext(pccb, start, smallblks);
	193	start += blks;
	194	blks = 0;
	195	}
	196	debug("scsi_read_ext: startblk " LBAF
	197	", blccnt %x buffer %" PRIXPTR "\n",
	198	start, smallblks, buf_addr);
	199	if (scsi_exec(pccb) != true) {
	200	scsi_print_error(pccb);
	201	blkcnt -= blks;
	202	break;
	203	}
	204	buf_addr += pccb->datalen;
	205	} while (blks != 0);
	206	debug("scsi_read_ext: end startblk " LBAF
	207	", blccnt %x buffer %" PRIXPTR "\n", start, smallblks, buf_addr);
	208	return blkcnt;
	209	}
	210
	211	/*******************************************************************************
	212	* scsi_write
	213	*/
	214
	215	/* Almost the maximum amount of the scsi_ext command.. */
	216	#define SCSI_MAX_WRITE_BLK 0xFFFF
	217
535556b2 SG	218	#ifdef CONFIG_BLK
	219	static ulong scsi_write(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
	220	const void *buffer)
	221	#else
11f610ed SG	222	static ulong scsi_write(struct blk_desc *block_dev, lbaint_t blknr,
11f610ed SG	223	lbaint_t blkcnt, const void *buffer)
535556b2	224	#endif
11f610ed	225	{
535556b2 SG	226	#ifdef CONFIG_BLK
	227	struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
	228	#endif
11f610ed SG	229	lbaint_t start, blks;
	230	uintptr_t buf_addr;
	231	unsigned short smallblks;
	232	ccb pccb = (ccb )&tempccb;
	233
11f610ed	234	/* Setup device */
cdb93b27 MS	235	pccb->target = block_dev->target;
cdb93b27 MS	236	pccb->lun = block_dev->lun;
11f610ed SG	237	buf_addr = (unsigned long)buffer;
	238	start = blknr;
	239	blks = blkcnt;
	240	debug("\n%s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n",
cdb93b27	241	__func__, block_dev->devnum, start, blks, (unsigned long)buffer);
11f610ed SG	242	do {
	243	pccb->pdata = (unsigned char *)buf_addr;
	244	if (blks > SCSI_MAX_WRITE_BLK) {
cdb93b27	245	pccb->datalen = (block_dev->blksz *
11f610ed SG	246	SCSI_MAX_WRITE_BLK);
	247	smallblks = SCSI_MAX_WRITE_BLK;
	248	scsi_setup_write_ext(pccb, start, smallblks);
	249	start += SCSI_MAX_WRITE_BLK;
	250	blks -= SCSI_MAX_WRITE_BLK;
	251	} else {
cdb93b27	252	pccb->datalen = block_dev->blksz * blks;
11f610ed SG	253	smallblks = (unsigned short)blks;
	254	scsi_setup_write_ext(pccb, start, smallblks);
	255	start += blks;
	256	blks = 0;
	257	}
	258	debug("%s: startblk " LBAF ", blccnt %x buffer %" PRIXPTR "\n",
	259	__func__, start, smallblks, buf_addr);
	260	if (scsi_exec(pccb) != true) {
	261	scsi_print_error(pccb);
	262	blkcnt -= blks;
	263	break;
	264	}
	265	buf_addr += pccb->datalen;
	266	} while (blks != 0);
	267	debug("%s: end startblk " LBAF ", blccnt %x buffer %" PRIXPTR "\n",
	268	__func__, start, smallblks, buf_addr);
	269	return blkcnt;
	270	}
	271
11f610ed SG	272	#if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT)
	273	void scsi_init(void)
	274	{
	275	int busdevfunc = -1;
	276	int i;
	277	/*
	278	* Find a device from the list, this driver will support a single
	279	* controller.
	280	*/
	281	for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
	282	/* get PCI Device ID */
	283	#ifdef CONFIG_DM_PCI
	284	struct udevice *dev;
	285	int ret;
	286
	287	ret = dm_pci_find_device(scsi_device_list[i].vendor,
	288	scsi_device_list[i].device, 0, &dev);
	289	if (!ret) {
	290	busdevfunc = dm_pci_get_bdf(dev);
	291	break;
	292	}
	293	#else
	294	busdevfunc = pci_find_device(scsi_device_list[i].vendor,
	295	scsi_device_list[i].device,
	296	0);
	297	#endif
	298	if (busdevfunc != -1)
	299	break;
	300	}
	301
	302	if (busdevfunc == -1) {
	303	printf("Error: SCSI Controller(s) ");
	304	for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
	305	printf("%04X:%04X ",
	306	scsi_device_list[i].vendor,
	307	scsi_device_list[i].device);
	308	}
	309	printf("not found\n");
	310	return;
	311	}
	312	#ifdef DEBUG
	313	else {
	314	printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",
	315	scsi_device_list[i].vendor,
	316	scsi_device_list[i].device,
	317	(busdevfunc >> 16) & 0xFF,
	318	(busdevfunc >> 11) & 0x1F,
	319	(busdevfunc >> 8) & 0x7);
	320	}
	321	#endif
	322	bootstage_start(BOOTSTAGE_ID_ACCUM_SCSI, "ahci");
	323	scsi_low_level_init(busdevfunc);
	324	scsi_scan(1);
	325	bootstage_accum(BOOTSTAGE_ID_ACCUM_SCSI);
	326	}
	327	#endif
	328
11f610ed SG	329	/* copy src to dest, skipping leading and trailing blanks
	330	* and null terminate the string
	331	*/
545a2847 MS	332	static void scsi_ident_cpy(unsigned char dest, unsigned char src,
545a2847 MS	333	unsigned int len)
11f610ed SG	334	{
	335	int start, end;
	336
	337	start = 0;
	338	while (start < len) {
	339	if (src[start] != ' ')
	340	break;
	341	start++;
	342	}
	343	end = len-1;
	344	while (end > start) {
	345	if (src[end] != ' ')
	346	break;
	347	end--;
	348	}
	349	for (; start <= end; start++)
	350	*dest ++= src[start];
	351	*dest = '\0';
	352	}
	353
545a2847 MS	354	static int scsi_read_capacity(ccb pccb, lbaint_t capacity,
545a2847 MS	355	unsigned long *blksz)
11f610ed SG	356	{
	357	*capacity = 0;
	358
	359	memset(pccb->cmd, '\0', sizeof(pccb->cmd));
	360	pccb->cmd[0] = SCSI_RD_CAPAC10;
	361	pccb->cmd[1] = pccb->lun << 5;
	362	pccb->cmdlen = 10;
	363	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
	364
	365	pccb->datalen = 8;
	366	if (scsi_exec(pccb) != true)
	367	return 1;
	368
	369	*capacity = ((lbaint_t)pccb->pdata[0] << 24) \|
	370	((lbaint_t)pccb->pdata[1] << 16) \|
	371	((lbaint_t)pccb->pdata[2] << 8) \|
	372	((lbaint_t)pccb->pdata[3]);
	373
	374	if (*capacity != 0xffffffff) {
	375	/* Read capacity (10) was sufficient for this drive. */
	376	*blksz = ((unsigned long)pccb->pdata[4] << 24) \|
	377	((unsigned long)pccb->pdata[5] << 16) \|
	378	((unsigned long)pccb->pdata[6] << 8) \|
	379	((unsigned long)pccb->pdata[7]);
	380	return 0;
	381	}
	382
	383	/* Read capacity (10) was insufficient. Use read capacity (16). */
	384	memset(pccb->cmd, '\0', sizeof(pccb->cmd));
	385	pccb->cmd[0] = SCSI_RD_CAPAC16;
	386	pccb->cmd[1] = 0x10;
	387	pccb->cmdlen = 16;
	388	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
	389
	390	pccb->datalen = 16;
	391	if (scsi_exec(pccb) != true)
	392	return 1;
	393
	394	*capacity = ((uint64_t)pccb->pdata[0] << 56) \|
	395	((uint64_t)pccb->pdata[1] << 48) \|
	396	((uint64_t)pccb->pdata[2] << 40) \|
	397	((uint64_t)pccb->pdata[3] << 32) \|
	398	((uint64_t)pccb->pdata[4] << 24) \|
	399	((uint64_t)pccb->pdata[5] << 16) \|
	400	((uint64_t)pccb->pdata[6] << 8) \|
	401	((uint64_t)pccb->pdata[7]);
	402
	403	*blksz = ((uint64_t)pccb->pdata[8] << 56) \|
	404	((uint64_t)pccb->pdata[9] << 48) \|
	405	((uint64_t)pccb->pdata[10] << 40) \|
	406	((uint64_t)pccb->pdata[11] << 32) \|
	407	((uint64_t)pccb->pdata[12] << 24) \|
	408	((uint64_t)pccb->pdata[13] << 16) \|
	409	((uint64_t)pccb->pdata[14] << 8) \|
	410	((uint64_t)pccb->pdata[15]);
	411
	412	return 0;
	413	}
	414
	415
	416	/*
	417	* Some setup (fill-in) routines
	418	*/
545a2847	419	static void scsi_setup_test_unit_ready(ccb *pccb)
11f610ed SG	420	{
	421	pccb->cmd[0] = SCSI_TST_U_RDY;
	422	pccb->cmd[1] = pccb->lun << 5;
	423	pccb->cmd[2] = 0;
	424	pccb->cmd[3] = 0;
	425	pccb->cmd[4] = 0;
	426	pccb->cmd[5] = 0;
	427	pccb->cmdlen = 6;
	428	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
	429	}
	430
0b3a58ee MS	431	/**
	432	* scsi_init_dev_desc_priv - initialize only SCSI specific blk_desc properties
	433	*
	434	* @dev_desc: Block device description pointer
	435	*/
	436	static void scsi_init_dev_desc_priv(struct blk_desc *dev_desc)
92ca476c MS	437	{
	438	dev_desc->target = 0xff;
	439	dev_desc->lun = 0xff;
92ca476c MS	440	dev_desc->log2blksz =
	441	LOG2_INVALID(typeof(dev_desc->log2blksz));
	442	dev_desc->type = DEV_TYPE_UNKNOWN;
	443	dev_desc->vendor[0] = 0;
	444	dev_desc->product[0] = 0;
	445	dev_desc->revision[0] = 0;
	446	dev_desc->removable = false;
92ca476c MS	447	#ifndef CONFIG_BLK
	448	dev_desc->block_read = scsi_read;
	449	dev_desc->block_write = scsi_write;
	450	#endif
	451	}
	452
e8a016b5	453	#if !defined(CONFIG_DM_SCSI)
0b3a58ee MS	454	/**
	455	* scsi_init_dev_desc - initialize all SCSI specific blk_desc properties
	456	*
	457	* @dev_desc: Block device description pointer
	458	* @devnum: Device number
	459	*/
	460	static void scsi_init_dev_desc(struct blk_desc *dev_desc, int devnum)
	461	{
	462	dev_desc->lba = 0;
	463	dev_desc->blksz = 0;
	464	dev_desc->if_type = IF_TYPE_SCSI;
	465	dev_desc->devnum = devnum;
	466	dev_desc->part_type = PART_TYPE_UNKNOWN;
	467
	468	scsi_init_dev_desc_priv(dev_desc);
	469	}
e8a016b5	470	#endif
bccfd9e9	471
570712f4 MS	472	/**
	473	* scsi_detect_dev - Detect scsi device
	474	*
bccfd9e9	475	* @target: target id
e39cecfd	476	* @lun: target lun
570712f4	477	* @dev_desc: block device description
570712f4 MS	478	*
570712f4 MS	479	* The scsi_detect_dev detects and fills a dev_desc structure when the device is
e39cecfd	480	* detected.
570712f4 MS	481	*
	482	* Return: 0 on success, error value otherwise
	483	*/
e39cecfd	484	static int scsi_detect_dev(int target, int lun, struct blk_desc *dev_desc)
570712f4 MS	485	{
	486	unsigned char perq, modi;
	487	lbaint_t capacity;
	488	unsigned long blksz;
bccfd9e9	489	ccb pccb = (ccb )&tempccb;
570712f4	490
bccfd9e9	491	pccb->target = target;
e39cecfd	492	pccb->lun = lun;
570712f4 MS	493	pccb->pdata = (unsigned char *)&tempbuff;
	494	pccb->datalen = 512;
	495	scsi_setup_inquiry(pccb);
	496	if (scsi_exec(pccb) != true) {
	497	if (pccb->contr_stat == SCSI_SEL_TIME_OUT) {
	498	/*
	499	* selection timeout => assuming no
	500	* device present
	501	*/
	502	debug("Selection timeout ID %d\n",
	503	pccb->target);
	504	return -ETIMEDOUT;
	505	}
	506	scsi_print_error(pccb);
	507	return -ENODEV;
	508	}
	509	perq = tempbuff[0];
	510	modi = tempbuff[1];
	511	if ((perq & 0x1f) == 0x1f)
	512	return -ENODEV; /* skip unknown devices */
	513	if ((modi & 0x80) == 0x80) /* drive is removable */
	514	dev_desc->removable = true;
	515	/* get info for this device */
	516	scsi_ident_cpy((unsigned char *)dev_desc->vendor,
	517	&tempbuff[8], 8);
	518	scsi_ident_cpy((unsigned char *)dev_desc->product,
	519	&tempbuff[16], 16);
	520	scsi_ident_cpy((unsigned char *)dev_desc->revision,
	521	&tempbuff[32], 4);
	522	dev_desc->target = pccb->target;
	523	dev_desc->lun = pccb->lun;
	524
	525	pccb->datalen = 0;
	526	scsi_setup_test_unit_ready(pccb);
	527	if (scsi_exec(pccb) != true) {
	528	if (dev_desc->removable) {
	529	dev_desc->type = perq;
	530	goto removable;
	531	}
	532	scsi_print_error(pccb);
	533	return -EINVAL;
	534	}
	535	if (scsi_read_capacity(pccb, &capacity, &blksz)) {
	536	scsi_print_error(pccb);
	537	return -EINVAL;
	538	}
	539	dev_desc->lba = capacity;
	540	dev_desc->blksz = blksz;
	541	dev_desc->log2blksz = LOG2(dev_desc->blksz);
	542	dev_desc->type = perq;
570712f4 MS	543	removable:
	544	return 0;
	545	}
	546
11f610ed SG	547	/*
	548	* (re)-scan the scsi bus and reports scsi device info
	549	* to the user if mode = 1
	550	*/
e8a016b5 MS	551	#if defined(CONFIG_DM_SCSI)
	552	int scsi_scan(int mode)
	553	{
	554	unsigned char i, lun;
	555	struct uclass *uc;
	556	struct udevice dev; / SCSI controller */
	557	int ret;
	558
	559	if (mode == 1)
	560	printf("scanning bus for devices...\n");
	561
f8f41ae6 MS	562	blk_unbind_all(IF_TYPE_SCSI);
f8f41ae6 MS	563
e8a016b5 MS	564	ret = uclass_get(UCLASS_SCSI, &uc);
	565	if (ret)
	566	return ret;
	567
	568	uclass_foreach_dev(dev, uc) {
	569	struct scsi_platdata plat; / scsi controller platdata */
	570
	571	/* probe SCSI controller driver */
	572	ret = device_probe(dev);
	573	if (ret)
	574	return ret;
	575
	576	/* Get controller platdata */
	577	plat = dev_get_platdata(dev);
	578
	579	for (i = 0; i < plat->max_id; i++) {
	580	for (lun = 0; lun < plat->max_lun; lun++) {
	581	struct udevice bdev; / block device */
	582	/* block device description */
	583	struct blk_desc *bdesc;
	584	char str[10];
	585
	586	/*
	587	* Create only one block device and do detection
	588	* to make sure that there won't be a lot of
	589	* block devices created
	590	*/
	591	snprintf(str, sizeof(str), "id%dlun%d", i, lun);
	592	ret = blk_create_devicef(dev, "scsi_blk",
	593	str, IF_TYPE_SCSI,
	594	-1, 0, 0, &bdev);
	595	if (ret) {
	596	debug("Can't create device\n");
	597	return ret;
	598	}
	599	bdesc = dev_get_uclass_platdata(bdev);
	600
	601	scsi_init_dev_desc_priv(bdesc);
e39cecfd	602	ret = scsi_detect_dev(i, lun, bdesc);
e8a016b5 MS	603	if (ret) {
	604	device_unbind(bdev);
	605	continue;
	606	}
1330a726	607	part_init(bdesc);
e8a016b5 MS	608
	609	if (mode == 1) {
	610	printf(" Device %d: ", 0);
	611	dev_print(bdesc);
	612	} /* if mode */
	613	} /* next LUN */
	614	}
	615	}
	616
	617	return 0;
	618	}
	619	#else
c002e39a	620	int scsi_scan(int mode)
11f610ed	621	{
570712f4 MS	622	unsigned char i, lun;
570712f4 MS	623	int ret;
11f610ed SG	624
	625	if (mode == 1)
	626	printf("scanning bus for devices...\n");
92ca476c MS	627	for (i = 0; i < CONFIG_SYS_SCSI_MAX_DEVICE; i++)
	628	scsi_init_dev_desc(&scsi_dev_desc[i], i);
	629
11f610ed SG	630	scsi_max_devs = 0;
11f610ed SG	631	for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) {
11f610ed	632	for (lun = 0; lun < CONFIG_SYS_SCSI_MAX_LUN; lun++) {
e39cecfd JJH	633	ret = scsi_detect_dev(i, lun,
e39cecfd JJH	634	&scsi_dev_desc[scsi_max_devs]);
570712f4	635	if (ret)
11f610ed	636	continue;
1330a726	637	part_init(&scsi_dev_desc[scsi_max_devs]);
570712f4	638
11f610ed	639	if (mode == 1) {
570712f4	640	printf(" Device %d: ", 0);
11f610ed SG	641	dev_print(&scsi_dev_desc[scsi_max_devs]);
	642	} /* if mode */
	643	scsi_max_devs++;
	644	} /* next LUN */
	645	}
	646	if (scsi_max_devs > 0)
	647	scsi_curr_dev = 0;
	648	else
	649	scsi_curr_dev = -1;
	650
	651	printf("Found %d device(s).\n", scsi_max_devs);
	652	#ifndef CONFIG_SPL_BUILD
	653	setenv_ulong("scsidevs", scsi_max_devs);
	654	#endif
c002e39a	655	return 0;
11f610ed	656	}
e8a016b5	657	#endif
11f610ed	658
535556b2 SG	659	#ifdef CONFIG_BLK
	660	static const struct blk_ops scsi_blk_ops = {
	661	.read = scsi_read,
	662	.write = scsi_write,
	663	};
	664
	665	U_BOOT_DRIVER(scsi_blk) = {
	666	.name = "scsi_blk",
	667	.id = UCLASS_BLK,
	668	.ops = &scsi_blk_ops,
	669	};
	670	#else
11f610ed	671	U_BOOT_LEGACY_BLK(scsi) = {
69c125fe	672	.if_typename = "scsi",
11f610ed SG	673	.if_type = IF_TYPE_SCSI,
	674	.max_devs = CONFIG_SYS_SCSI_MAX_DEVICE,
	675	.desc = scsi_dev_desc,
	676	};
535556b2	677	#endif