[people/ms/u-boot.git] / drivers / ahci.c

/*
 * Copyright (C) Freescale Semiconductor, Inc. 2006. All rights reserved.
 * Author: Jason Jin<Jason.jin@freescale.com>
 *         Zhang Wei<wei.zhang@freescale.com>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 * with the reference on libata and ahci drvier in kernel
 *
 */
#include <common.h>

#ifdef CONFIG_SCSI_AHCI

#include <command.h>
#include <pci.h>
#include <asm/processor.h>
#include <asm/errno.h>
#include <asm/io.h>
#include <malloc.h>
#include <scsi.h>
#include <ata.h>
#include <linux/ctype.h>
#include <ahci.h>

struct ahci_probe_ent *probe_ent = NULL;
hd_driveid_t *ataid[AHCI_MAX_PORTS];

#define writel_with_flush(a,b)	do { writel(a,b); readl(b); } while (0)


static inline u32 ahci_port_base(u32 base, u32 port)
{
	return base + 0x100 + (port * 0x80);
}


static void ahci_setup_port(struct ahci_ioports *port, unsigned long base,
			    unsigned int port_idx)
{
	base = ahci_port_base(base, port_idx);

	port->cmd_addr = base;
	port->scr_addr = base + PORT_SCR;
}


#define msleep(a) udelay(a * 1000)
#define ssleep(a) msleep(a * 1000)

static int waiting_for_cmd_completed(volatile u8 *offset,
				     int timeout_msec,
				     u32 sign)
{
	int i;
	u32 status;

	for (i = 0; ((status = readl(offset)) & sign) && i < timeout_msec; i++)
		msleep(1);

	return (i < timeout_msec) ? 0 : -1;
}


static int ahci_host_init(struct ahci_probe_ent *probe_ent)
{
	pci_dev_t pdev = probe_ent->dev;
	volatile u8 *mmio = (volatile u8 *)probe_ent->mmio_base;
	u32 tmp, cap_save;
	u16 tmp16;
	int i, j;
	volatile u8 *port_mmio;
	unsigned short vendor;

	cap_save = readl(mmio + HOST_CAP);
	cap_save &= ((1 << 28) | (1 << 17));
	cap_save |= (1 << 27);

	/* global controller reset */
	tmp = readl(mmio + HOST_CTL);
	if ((tmp & HOST_RESET) == 0)
		writel_with_flush(tmp | HOST_RESET, mmio + HOST_CTL);

	/* reset must complete within 1 second, or
	 * the hardware should be considered fried.
	 */
	ssleep(1);

	tmp = readl(mmio + HOST_CTL);
	if (tmp & HOST_RESET) {
		debug("controller reset failed (0x%x)\n", tmp);
		return -1;
	}

	writel_with_flush(HOST_AHCI_EN, mmio + HOST_CTL);
	writel(cap_save, mmio + HOST_CAP);
	writel_with_flush(0xf, mmio + HOST_PORTS_IMPL);

	pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor);

	if (vendor == PCI_VENDOR_ID_INTEL) {
		u16 tmp16;
		pci_read_config_word(pdev, 0x92, &tmp16);
		tmp16 |= 0xf;
		pci_write_config_word(pdev, 0x92, tmp16);
	}

	probe_ent->cap = readl(mmio + HOST_CAP);
	probe_ent->port_map = readl(mmio + HOST_PORTS_IMPL);
	probe_ent->n_ports = (probe_ent->cap & 0x1f) + 1;

	debug("cap 0x%x  port_map 0x%x  n_ports %d\n",
	      probe_ent->cap, probe_ent->port_map, probe_ent->n_ports);

	for (i = 0; i < probe_ent->n_ports; i++) {
		probe_ent->port[i].port_mmio = ahci_port_base((u32) mmio, i);
		port_mmio = (u8 *) probe_ent->port[i].port_mmio;
		ahci_setup_port(&probe_ent->port[i], (unsigned long)mmio, i);

		/* make sure port is not active */
		tmp = readl(port_mmio + PORT_CMD);
		if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
			   PORT_CMD_FIS_RX | PORT_CMD_START)) {
			tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
				 PORT_CMD_FIS_RX | PORT_CMD_START);
			writel_with_flush(tmp, port_mmio + PORT_CMD);

			/* spec says 500 msecs for each bit, so
			 * this is slightly incorrect.
			 */
			msleep(500);
		}

		writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD);

		j = 0;
		while (j < 100) {
			msleep(10);
			tmp = readl(port_mmio + PORT_SCR_STAT);
			if ((tmp & 0xf) == 0x3)
				break;
			j++;
		}

		tmp = readl(port_mmio + PORT_SCR_ERR);
		debug("PORT_SCR_ERR 0x%x\n", tmp);
		writel(tmp, port_mmio + PORT_SCR_ERR);

		/* ack any pending irq events for this port */
		tmp = readl(port_mmio + PORT_IRQ_STAT);
		debug("PORT_IRQ_STAT 0x%x\n", tmp);
		if (tmp)
			writel(tmp, port_mmio + PORT_IRQ_STAT);

		writel(1 << i, mmio + HOST_IRQ_STAT);

		/* set irq mask (enables interrupts) */
		writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);

		/*register linkup ports */
		tmp = readl(port_mmio + PORT_SCR_STAT);
		debug("Port %d status: 0x%x\n", i, tmp);
		if ((tmp & 0xf) == 0x03)
			probe_ent->link_port_map |= (0x01 << i);
	}

	tmp = readl(mmio + HOST_CTL);
	debug("HOST_CTL 0x%x\n", tmp);
	writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
	tmp = readl(mmio + HOST_CTL);
	debug("HOST_CTL 0x%x\n", tmp);

	pci_read_config_word(pdev, PCI_COMMAND, &tmp16);
	tmp |= PCI_COMMAND_MASTER;
	pci_write_config_word(pdev, PCI_COMMAND, tmp16);

	return 0;
}


static void ahci_print_info(struct ahci_probe_ent *probe_ent)
{
	pci_dev_t pdev = probe_ent->dev;
	volatile u8 *mmio = (volatile u8 *)probe_ent->mmio_base;
	u32 vers, cap, impl, speed;
	const char *speed_s;
	u16 cc;
	const char *scc_s;

	vers = readl(mmio + HOST_VERSION);
	cap = probe_ent->cap;
	impl = probe_ent->port_map;

	speed = (cap >> 20) & 0xf;
	if (speed == 1)
		speed_s = "1.5";
	else if (speed == 2)
		speed_s = "3";
	else
		speed_s = "?";

	pci_read_config_word(pdev, 0x0a, &cc);
	if (cc == 0x0101)
		scc_s = "IDE";
	else if (cc == 0x0106)
		scc_s = "SATA";
	else if (cc == 0x0104)
		scc_s = "RAID";
	else
		scc_s = "unknown";

	printf("AHCI %02x%02x.%02x%02x "
	       "%u slots %u ports %s Gbps 0x%x impl %s mode\n",
	       (vers >> 24) & 0xff,
	       (vers >> 16) & 0xff,
	       (vers >> 8) & 0xff,
	       vers & 0xff,
	       ((cap >> 8) & 0x1f) + 1, (cap & 0x1f) + 1, speed_s, impl, scc_s);

	printf("flags: "
	       "%s%s%s%s%s%s"
	       "%s%s%s%s%s%s%s\n",
	       cap & (1 << 31) ? "64bit " : "",
	       cap & (1 << 30) ? "ncq " : "",
	       cap & (1 << 28) ? "ilck " : "",
	       cap & (1 << 27) ? "stag " : "",
	       cap & (1 << 26) ? "pm " : "",
	       cap & (1 << 25) ? "led " : "",
	       cap & (1 << 24) ? "clo " : "",
	       cap & (1 << 19) ? "nz " : "",
	       cap & (1 << 18) ? "only " : "",
	       cap & (1 << 17) ? "pmp " : "",
	       cap & (1 << 15) ? "pio " : "",
	       cap & (1 << 14) ? "slum " : "",
	       cap & (1 << 13) ? "part " : "");
}

static int ahci_init_one(pci_dev_t pdev)
{
	u32 iobase, vendor;
	int rc;

	memset((void *)ataid, 0, sizeof(hd_driveid_t *) * AHCI_MAX_PORTS);

	probe_ent = malloc(sizeof(probe_ent));
	memset(probe_ent, 0, sizeof(probe_ent));
	probe_ent->dev = pdev;

	pci_read_config_dword(pdev, AHCI_PCI_BAR, &iobase);
	iobase &= ~0xf;

	probe_ent->host_flags = ATA_FLAG_SATA
				| ATA_FLAG_NO_LEGACY
				| ATA_FLAG_MMIO
				| ATA_FLAG_PIO_DMA
				| ATA_FLAG_NO_ATAPI;
	probe_ent->pio_mask = 0x1f;
	probe_ent->udma_mask = 0x7f;	/*Fixme,assume to support UDMA6 */

	probe_ent->mmio_base = iobase;

	/* Take from kernel:
	 * JMicron-specific fixup:
	 * make sure we're in AHCI mode
	 */
	pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor);
	if (vendor == 0x197b)
		pci_write_config_byte(pdev, 0x41, 0xa1);

	/* initialize adapter */
	rc = ahci_host_init(probe_ent);
	if (rc)
		goto err_out;

	ahci_print_info(probe_ent);

	return 0;

      err_out:
	return rc;
}


#define MAX_DATA_BYTE_COUNT  (4*1024*1024)

static int ahci_fill_sg(u8 port, unsigned char *buf, int buf_len)
{
	struct ahci_ioports *pp = &(probe_ent->port[port]);
	struct ahci_sg *ahci_sg = pp->cmd_tbl_sg;
	u32 sg_count;
	int i;

	sg_count = ((buf_len - 1) / MAX_DATA_BYTE_COUNT) + 1;
	if (sg_count > AHCI_MAX_SG) {
		printf("Error:Too much sg!\n");
		return -1;
	}

	for (i = 0; i < sg_count; i++) {
		ahci_sg->addr =
		    cpu_to_le32((u32) buf + i * MAX_DATA_BYTE_COUNT);
		ahci_sg->addr_hi = 0;
		ahci_sg->flags_size = cpu_to_le32(0x3fffff &
					  (buf_len < MAX_DATA_BYTE_COUNT
					   ? (buf_len - 1)
					   : (MAX_DATA_BYTE_COUNT - 1)));
		ahci_sg++;
		buf_len -= MAX_DATA_BYTE_COUNT;
	}

	return sg_count;
}


static void ahci_fill_cmd_slot(struct ahci_ioports *pp, u32 opts)
{
	pp->cmd_slot->opts = cpu_to_le32(opts);
	pp->cmd_slot->status = 0;
	pp->cmd_slot->tbl_addr = cpu_to_le32(pp->cmd_tbl & 0xffffffff);
	pp->cmd_slot->tbl_addr_hi = 0;
}


static void ahci_set_feature(u8 port)
{
	struct ahci_ioports *pp = &(probe_ent->port[port]);
	volatile u8 *port_mmio = (volatile u8 *)pp->port_mmio;
	u32 cmd_fis_len = 5;	/* five dwords */
	u8 fis[20];

	/*set feature */
	memset(fis, 0, 20);
	fis[0] = 0x27;
	fis[1] = 1 << 7;
	fis[2] = ATA_CMD_SETF;
	fis[3] = SETFEATURES_XFER;
	fis[12] = __ilog2(probe_ent->udma_mask + 1) + 0x40 - 0x01;

	memcpy((unsigned char *)pp->cmd_tbl, fis, 20);
	ahci_fill_cmd_slot(pp, cmd_fis_len);
	writel(1, port_mmio + PORT_CMD_ISSUE);
	readl(port_mmio + PORT_CMD_ISSUE);

	if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 150, 0x1)) {
		printf("set feature error!\n");
	}
}


static int ahci_port_start(u8 port)
{
	struct ahci_ioports *pp = &(probe_ent->port[port]);
	volatile u8 *port_mmio = (volatile u8 *)pp->port_mmio;
	u32 port_status;
	u32 mem;

	debug("Enter start port: %d\n", port);
	port_status = readl(port_mmio + PORT_SCR_STAT);
	debug("Port %d status: %x\n", port, port_status);
	if ((port_status & 0xf) != 0x03) {
		printf("No Link on this port!\n");
		return -1;
	}

	mem = (u32) malloc(AHCI_PORT_PRIV_DMA_SZ + 2048);
	if (!mem) {
		free(pp);
		printf("No mem for table!\n");
		return -ENOMEM;
	}

	mem = (mem + 0x800) & (~0x7ff);	/* Aligned to 2048-bytes */
	memset((u8 *) mem, 0, AHCI_PORT_PRIV_DMA_SZ);

	/*
	 * First item in chunk of DMA memory: 32-slot command table,
	 * 32 bytes each in size
	 */
	pp->cmd_slot = (struct ahci_cmd_hdr *)mem;
	debug("cmd_slot = 0x%x\n", pp->cmd_slot);
	mem += (AHCI_CMD_SLOT_SZ + 224);

	/*
	 * Second item: Received-FIS area
	 */
	pp->rx_fis = mem;
	mem += AHCI_RX_FIS_SZ;

	/*
	 * Third item: data area for storing a single command
	 * and its scatter-gather table
	 */
	pp->cmd_tbl = mem;
	debug("cmd_tbl_dma = 0x%x\n", pp->cmd_tbl);

	mem += AHCI_CMD_TBL_HDR;
	pp->cmd_tbl_sg = (struct ahci_sg *)mem;

	writel_with_flush((u32) pp->cmd_slot, port_mmio + PORT_LST_ADDR);

	writel_with_flush(pp->rx_fis, port_mmio + PORT_FIS_ADDR);

	writel_with_flush(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
			  PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
			  PORT_CMD_START, port_mmio + PORT_CMD);

	debug("Exit start port %d\n", port);

	return 0;
}


static int get_ahci_device_data(u8 port, u8 *fis, int fis_len, u8 *buf,
				int buf_len)
{

	struct ahci_ioports *pp = &(probe_ent->port[port]);
	volatile u8 *port_mmio = (volatile u8 *)pp->port_mmio;
	u32 opts;
	u32 port_status;
	int sg_count;

	debug("Enter get_ahci_device_data: for port %d\n", port);

	if (port > probe_ent->n_ports) {
		printf("Invaild port number %d\n", port);
		return -1;
	}

	port_status = readl(port_mmio + PORT_SCR_STAT);
	if ((port_status & 0xf) != 0x03) {
		debug("No Link on port %d!\n", port);
		return -1;
	}

	memcpy((unsigned char *)pp->cmd_tbl, fis, fis_len);

	sg_count = ahci_fill_sg(port, buf, buf_len);
	opts = (fis_len >> 2) | (sg_count << 16);
	ahci_fill_cmd_slot(pp, opts);

	writel_with_flush(1, port_mmio + PORT_CMD_ISSUE);

	if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 150, 0x1)) {
		printf("timeout exit!\n");
		return -1;
	}
	debug("get_ahci_device_data: %d byte transferred.\n",
	      pp->cmd_slot->status);

	return 0;
}


static char *ata_id_strcpy(u16 *target, u16 *src, int len)
{
	int i;
	for (i = 0; i < len / 2; i++)
		target[i] = le16_to_cpu(src[i]);
	return (char *)target;
}


static void dump_ataid(hd_driveid_t *ataid)
{
	debug("(49)ataid->capability = 0x%x\n", ataid->capability);
	debug("(53)ataid->field_valid =0x%x\n", ataid->field_valid);
	debug("(63)ataid->dma_mword = 0x%x\n", ataid->dma_mword);
	debug("(64)ataid->eide_pio_modes = 0x%x\n", ataid->eide_pio_modes);
	debug("(75)ataid->queue_depth = 0x%x\n", ataid->queue_depth);
	debug("(80)ataid->major_rev_num = 0x%x\n", ataid->major_rev_num);
	debug("(81)ataid->minor_rev_num = 0x%x\n", ataid->minor_rev_num);
	debug("(82)ataid->command_set_1 = 0x%x\n", ataid->command_set_1);
	debug("(83)ataid->command_set_2 = 0x%x\n", ataid->command_set_2);
	debug("(84)ataid->cfsse = 0x%x\n", ataid->cfsse);
	debug("(85)ataid->cfs_enable_1 = 0x%x\n", ataid->cfs_enable_1);
	debug("(86)ataid->cfs_enable_2 = 0x%x\n", ataid->cfs_enable_2);
	debug("(87)ataid->csf_default = 0x%x\n", ataid->csf_default);
	debug("(88)ataid->dma_ultra = 0x%x\n", ataid->dma_ultra);
	debug("(93)ataid->hw_config = 0x%x\n", ataid->hw_config);
}


/*
 * SCSI INQUIRY command operation.
 */
static int ata_scsiop_inquiry(ccb *pccb)
{
	u8 hdr[] = {
		0,
		0,
		0x5,		/* claim SPC-3 version compatibility */
		2,
		95 - 4,
	};
	u8 fis[20];
	u8 *tmpid;
	u8 port;

	/* Clean ccb data buffer */
	memset(pccb->pdata, 0, pccb->datalen);

	memcpy(pccb->pdata, hdr, sizeof(hdr));

	if (pccb->datalen <= 35)
		return 0;

	memset(fis, 0, 20);
	/* Construct the FIS */
	fis[0] = 0x27;		/* Host to device FIS. */
	fis[1] = 1 << 7;	/* Command FIS. */
	fis[2] = ATA_CMD_IDENT;	/* Command byte. */

	/* Read id from sata */
	port = pccb->target;
	if (!(tmpid = malloc(sizeof(hd_driveid_t))))
		return -ENOMEM;

	if (get_ahci_device_data(port, (u8 *) & fis, 20,
				 tmpid, sizeof(hd_driveid_t))) {
		debug("scsi_ahci: SCSI inquiry command failure.\n");
		return -EIO;
	}

	if (ataid[port])
		free(ataid[port]);
	ataid[port] = (hd_driveid_t *) tmpid;

	memcpy(&pccb->pdata[8], "ATA     ", 8);
	ata_id_strcpy((u16 *) &pccb->pdata[16], (u16 *)ataid[port]->model, 16);
	ata_id_strcpy((u16 *) &pccb->pdata[32], (u16 *)ataid[port]->fw_rev, 4);

	dump_ataid(ataid[port]);
	return 0;
}


/*
 * SCSI READ10 command operation.
 */
static int ata_scsiop_read10(ccb * pccb)
{
	u64 lba = 0;
	u32 len = 0;
	u8 fis[20];

	lba = (((u64) pccb->cmd[2]) << 24) | (((u64) pccb->cmd[3]) << 16)
	    | (((u64) pccb->cmd[4]) << 8) | ((u64) pccb->cmd[5]);
	len = (((u32) pccb->cmd[7]) << 8) | ((u32) pccb->cmd[8]);

	/* For 10-byte and 16-byte SCSI R/W commands, transfer
	 * length 0 means transfer 0 block of data.
	 * However, for ATA R/W commands, sector count 0 means
	 * 256 or 65536 sectors, not 0 sectors as in SCSI.
	 *
	 * WARNING: one or two older ATA drives treat 0 as 0...
	 */
	if (!len)
		return 0;
	memset(fis, 0, 20);

	/* Construct the FIS */
	fis[0] = 0x27;		/* Host to device FIS. */
	fis[1] = 1 << 7;	/* Command FIS. */
	fis[2] = ATA_CMD_RD_DMA;	/* Command byte. */

	/* LBA address, only support LBA28 in this driver */
	fis[4] = pccb->cmd[5];
	fis[5] = pccb->cmd[4];
	fis[6] = pccb->cmd[3];
	fis[7] = (pccb->cmd[2] & 0x0f) | 0xe0;

	/* Sector Count */
	fis[12] = pccb->cmd[8];
	fis[13] = pccb->cmd[7];

	/* Read from ahci */
	if (get_ahci_device_data(pccb->target, (u8 *) & fis, 20,
				 pccb->pdata, pccb->datalen)) {
		debug("scsi_ahci: SCSI READ10 command failure.\n");
		return -EIO;
	}

	return 0;
}


/*
 * SCSI READ CAPACITY10 command operation.
 */
static int ata_scsiop_read_capacity10(ccb *pccb)
{
	u8 buf[8];

	if (!ataid[pccb->target]) {
		printf("scsi_ahci: SCSI READ CAPACITY10 command failure. "
		       "\tNo ATA info!\n"
		       "\tPlease run SCSI commmand INQUIRY firstly!\n");
		return -EPERM;
	}

	memset(buf, 0, 8);

	*(u32 *) buf = le32_to_cpu(ataid[pccb->target]->lba_capacity);

	buf[6] = 512 >> 8;
	buf[7] = 512 & 0xff;

	memcpy(pccb->pdata, buf, 8);

	return 0;
}


/*
 * SCSI TEST UNIT READY command operation.
 */
static int ata_scsiop_test_unit_ready(ccb *pccb)
{
	return (ataid[pccb->target]) ? 0 : -EPERM;
}


int scsi_exec(ccb *pccb)
{
	int ret;

	switch (pccb->cmd[0]) {
	case SCSI_READ10:
		ret = ata_scsiop_read10(pccb);
		break;
	case SCSI_RD_CAPAC:
		ret = ata_scsiop_read_capacity10(pccb);
		break;
	case SCSI_TST_U_RDY:
		ret = ata_scsiop_test_unit_ready(pccb);
		break;
	case SCSI_INQUIRY:
		ret = ata_scsiop_inquiry(pccb);
		break;
	default:
		printf("Unsupport SCSI command 0x%02x\n", pccb->cmd[0]);
		return FALSE;
	}

	if (ret) {
		debug("SCSI command 0x%02x ret errno %d\n", pccb->cmd[0], ret);
		return FALSE;
	}
	return TRUE;

}


void scsi_low_level_init(int busdevfunc)
{
	int i;
	u32 linkmap;

	ahci_init_one(busdevfunc);

	linkmap = probe_ent->link_port_map;

	for (i = 0; i < CFG_SCSI_MAX_SCSI_ID; i++) {
		if (((linkmap >> i) & 0x01)) {
			if (ahci_port_start((u8) i)) {
				printf("Can not start port %d\n", i);
				continue;
			}
			ahci_set_feature((u8) i);
		}
	}
}


void scsi_bus_reset(void)
{
	/*Not implement*/
}


void scsi_print_error(ccb * pccb)
{
	/*The ahci error info can be read in the ahci driver*/
}
#endif
Commit	Line	Data
4782ac80 JZ	1	/*
	2	* Copyright (C) Freescale Semiconductor, Inc. 2006. All rights reserved.
	3	* Author: Jason Jin<Jason.jin@freescale.com>
	4	* Zhang Wei<wei.zhang@freescale.com>
	5	*
	6	* See file CREDITS for list of people who contributed to this
	7	* project.
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License as
	11	* published by the Free Software Foundation; either version 2 of
	12	* the License, or (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	22	* MA 02111-1307 USA
	23	*
	24	* with the reference on libata and ahci drvier in kernel
	25	*
	26	*/
	27	#include <common.h>
	28
	29	#ifdef CONFIG_SCSI_AHCI
	30
	31	#include <command.h>
	32	#include <pci.h>
	33	#include <asm/processor.h>
	34	#include <asm/errno.h>
	35	#include <asm/io.h>
	36	#include <malloc.h>
	37	#include <scsi.h>
	38	#include <ata.h>
	39	#include <linux/ctype.h>
	40	#include <ahci.h>
	41
	42	struct ahci_probe_ent *probe_ent = NULL;
	43	hd_driveid_t *ataid[AHCI_MAX_PORTS];
	44
4a7cc0f2 JL	45	#define writel_with_flush(a,b) do { writel(a,b); readl(b); } while (0)
4a7cc0f2 JL	46
4782ac80 JZ	47
	48	static inline u32 ahci_port_base(u32 base, u32 port)
	49	{
	50	return base + 0x100 + (port * 0x80);
	51	}
	52
	53
	54	static void ahci_setup_port(struct ahci_ioports *port, unsigned long base,
	55	unsigned int port_idx)
	56	{
	57	base = ahci_port_base(base, port_idx);
	58
4a7cc0f2 JL	59	port->cmd_addr = base;
4a7cc0f2 JL	60	port->scr_addr = base + PORT_SCR;
4782ac80 JZ	61	}
	62
	63
	64	#define msleep(a) udelay(a * 1000)
	65	#define ssleep(a) msleep(a * 1000)
4a7cc0f2 JL	66
	67	static int waiting_for_cmd_completed(volatile u8 *offset,
	68	int timeout_msec,
	69	u32 sign)
4782ac80 JZ	70	{
	71	int i;
	72	u32 status;
4a7cc0f2 JL	73
4a7cc0f2 JL	74	for (i = 0; ((status = readl(offset)) & sign) && i < timeout_msec; i++)
4782ac80 JZ	75	msleep(1);
4782ac80 JZ	76
4a7cc0f2	77	return (i < timeout_msec) ? 0 : -1;
4782ac80 JZ	78	}
	79
	80
	81	static int ahci_host_init(struct ahci_probe_ent *probe_ent)
	82	{
	83	pci_dev_t pdev = probe_ent->dev;
	84	volatile u8 mmio = (volatile u8 )probe_ent->mmio_base;
	85	u32 tmp, cap_save;
	86	u16 tmp16;
	87	int i, j;
4a7cc0f2	88	volatile u8 *port_mmio;
4782ac80 JZ	89	unsigned short vendor;
	90
	91	cap_save = readl(mmio + HOST_CAP);
4a7cc0f2	92	cap_save &= ((1 << 28) \| (1 << 17));
4782ac80 JZ	93	cap_save \|= (1 << 27);
	94
	95	/* global controller reset */
	96	tmp = readl(mmio + HOST_CTL);
	97	if ((tmp & HOST_RESET) == 0)
	98	writel_with_flush(tmp \| HOST_RESET, mmio + HOST_CTL);
	99
	100	/* reset must complete within 1 second, or
	101	* the hardware should be considered fried.
	102	*/
	103	ssleep(1);
	104
	105	tmp = readl(mmio + HOST_CTL);
	106	if (tmp & HOST_RESET) {
	107	debug("controller reset failed (0x%x)\n", tmp);
	108	return -1;
	109	}
	110
	111	writel_with_flush(HOST_AHCI_EN, mmio + HOST_CTL);
	112	writel(cap_save, mmio + HOST_CAP);
	113	writel_with_flush(0xf, mmio + HOST_PORTS_IMPL);
	114
	115	pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor);
	116
	117	if (vendor == PCI_VENDOR_ID_INTEL) {
	118	u16 tmp16;
	119	pci_read_config_word(pdev, 0x92, &tmp16);
	120	tmp16 \|= 0xf;
	121	pci_write_config_word(pdev, 0x92, tmp16);
	122	}
	123
	124	probe_ent->cap = readl(mmio + HOST_CAP);
	125	probe_ent->port_map = readl(mmio + HOST_PORTS_IMPL);
	126	probe_ent->n_ports = (probe_ent->cap & 0x1f) + 1;
	127
	128	debug("cap 0x%x port_map 0x%x n_ports %d\n",
4a7cc0f2	129	probe_ent->cap, probe_ent->port_map, probe_ent->n_ports);
4782ac80 JZ	130
4782ac80 JZ	131	for (i = 0; i < probe_ent->n_ports; i++) {
4a7cc0f2 JL	132	probe_ent->port[i].port_mmio = ahci_port_base((u32) mmio, i);
	133	port_mmio = (u8 *) probe_ent->port[i].port_mmio;
	134	ahci_setup_port(&probe_ent->port[i], (unsigned long)mmio, i);
4782ac80 JZ	135
	136	/* make sure port is not active */
	137	tmp = readl(port_mmio + PORT_CMD);
	138	if (tmp & (PORT_CMD_LIST_ON \| PORT_CMD_FIS_ON \|
	139	PORT_CMD_FIS_RX \| PORT_CMD_START)) {
	140	tmp &= ~(PORT_CMD_LIST_ON \| PORT_CMD_FIS_ON \|
	141	PORT_CMD_FIS_RX \| PORT_CMD_START);
	142	writel_with_flush(tmp, port_mmio + PORT_CMD);
	143
	144	/* spec says 500 msecs for each bit, so
	145	* this is slightly incorrect.
	146	*/
	147	msleep(500);
	148	}
	149
	150	writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD);
	151
	152	j = 0;
	153	while (j < 100) {
	154	msleep(10);
	155	tmp = readl(port_mmio + PORT_SCR_STAT);
	156	if ((tmp & 0xf) == 0x3)
	157	break;
	158	j++;
	159	}
	160
	161	tmp = readl(port_mmio + PORT_SCR_ERR);
	162	debug("PORT_SCR_ERR 0x%x\n", tmp);
	163	writel(tmp, port_mmio + PORT_SCR_ERR);
	164
	165	/* ack any pending irq events for this port */
	166	tmp = readl(port_mmio + PORT_IRQ_STAT);
	167	debug("PORT_IRQ_STAT 0x%x\n", tmp);
	168	if (tmp)
	169	writel(tmp, port_mmio + PORT_IRQ_STAT);
	170
	171	writel(1 << i, mmio + HOST_IRQ_STAT);
	172
	173	/* set irq mask (enables interrupts) */
	174	writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
	175
4a7cc0f2	176	/register linkup ports /
4782ac80	177	tmp = readl(port_mmio + PORT_SCR_STAT);
4a7cc0f2 JL	178	debug("Port %d status: 0x%x\n", i, tmp);
	179	if ((tmp & 0xf) == 0x03)
	180	probe_ent->link_port_map \|= (0x01 << i);
4782ac80 JZ	181	}
	182
	183	tmp = readl(mmio + HOST_CTL);
	184	debug("HOST_CTL 0x%x\n", tmp);
	185	writel(tmp \| HOST_IRQ_EN, mmio + HOST_CTL);
	186	tmp = readl(mmio + HOST_CTL);
	187	debug("HOST_CTL 0x%x\n", tmp);
	188
	189	pci_read_config_word(pdev, PCI_COMMAND, &tmp16);
	190	tmp \|= PCI_COMMAND_MASTER;
	191	pci_write_config_word(pdev, PCI_COMMAND, tmp16);
	192
	193	return 0;
	194	}
	195
	196
	197	static void ahci_print_info(struct ahci_probe_ent *probe_ent)
	198	{
	199	pci_dev_t pdev = probe_ent->dev;
4a7cc0f2	200	volatile u8 mmio = (volatile u8 )probe_ent->mmio_base;
4782ac80 JZ	201	u32 vers, cap, impl, speed;
	202	const char *speed_s;
	203	u16 cc;
	204	const char *scc_s;
	205
	206	vers = readl(mmio + HOST_VERSION);
	207	cap = probe_ent->cap;
	208	impl = probe_ent->port_map;
	209
	210	speed = (cap >> 20) & 0xf;
	211	if (speed == 1)
	212	speed_s = "1.5";
	213	else if (speed == 2)
	214	speed_s = "3";
	215	else
	216	speed_s = "?";
	217
	218	pci_read_config_word(pdev, 0x0a, &cc);
	219	if (cc == 0x0101)
	220	scc_s = "IDE";
	221	else if (cc == 0x0106)
	222	scc_s = "SATA";
	223	else if (cc == 0x0104)
	224	scc_s = "RAID";
	225	else
	226	scc_s = "unknown";
	227
4a7cc0f2 JL	228	printf("AHCI %02x%02x.%02x%02x "
	229	"%u slots %u ports %s Gbps 0x%x impl %s mode\n",
	230	(vers >> 24) & 0xff,
	231	(vers >> 16) & 0xff,
	232	(vers >> 8) & 0xff,
	233	vers & 0xff,
	234	((cap >> 8) & 0x1f) + 1, (cap & 0x1f) + 1, speed_s, impl, scc_s);
4782ac80 JZ	235
4782ac80 JZ	236	printf("flags: "
4a7cc0f2 JL	237	"%s%s%s%s%s%s"
	238	"%s%s%s%s%s%s%s\n",
	239	cap & (1 << 31) ? "64bit " : "",
	240	cap & (1 << 30) ? "ncq " : "",
	241	cap & (1 << 28) ? "ilck " : "",
	242	cap & (1 << 27) ? "stag " : "",
	243	cap & (1 << 26) ? "pm " : "",
	244	cap & (1 << 25) ? "led " : "",
	245	cap & (1 << 24) ? "clo " : "",
	246	cap & (1 << 19) ? "nz " : "",
	247	cap & (1 << 18) ? "only " : "",
	248	cap & (1 << 17) ? "pmp " : "",
	249	cap & (1 << 15) ? "pio " : "",
	250	cap & (1 << 14) ? "slum " : "",
	251	cap & (1 << 13) ? "part " : "");
4782ac80 JZ	252	}
4782ac80 JZ	253
4a7cc0f2	254	static int ahci_init_one(pci_dev_t pdev)
4782ac80 JZ	255	{
	256	u32 iobase, vendor;
	257	int rc;
	258
4a7cc0f2	259	memset((void )ataid, 0, sizeof(hd_driveid_t ) * AHCI_MAX_PORTS);
4782ac80 JZ	260
	261	probe_ent = malloc(sizeof(probe_ent));
	262	memset(probe_ent, 0, sizeof(probe_ent));
	263	probe_ent->dev = pdev;
	264
	265	pci_read_config_dword(pdev, AHCI_PCI_BAR, &iobase);
	266	iobase &= ~0xf;
	267
4a7cc0f2 JL	268	probe_ent->host_flags = ATA_FLAG_SATA
	269	\| ATA_FLAG_NO_LEGACY
	270	\| ATA_FLAG_MMIO
	271	\| ATA_FLAG_PIO_DMA
	272	\| ATA_FLAG_NO_ATAPI;
	273	probe_ent->pio_mask = 0x1f;
	274	probe_ent->udma_mask = 0x7f; /Fixme,assume to support UDMA6 /
4782ac80	275
4a7cc0f2	276	probe_ent->mmio_base = iobase;
4782ac80 JZ	277
	278	/* Take from kernel:
	279	* JMicron-specific fixup:
	280	* make sure we're in AHCI mode
	281	*/
	282	pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor);
4a7cc0f2	283	if (vendor == 0x197b)
4782ac80 JZ	284	pci_write_config_byte(pdev, 0x41, 0xa1);
	285
	286	/* initialize adapter */
	287	rc = ahci_host_init(probe_ent);
	288	if (rc)
	289	goto err_out;
	290
	291	ahci_print_info(probe_ent);
	292
	293	return 0;
	294
4a7cc0f2	295	err_out:
4782ac80 JZ	296	return rc;
	297	}
	298
	299
	300	#define MAX_DATA_BYTE_COUNT (410241024)
4a7cc0f2	301
4782ac80 JZ	302	static int ahci_fill_sg(u8 port, unsigned char *buf, int buf_len)
4782ac80 JZ	303	{
4782ac80 JZ	304	struct ahci_ioports *pp = &(probe_ent->port[port]);
	305	struct ahci_sg *ahci_sg = pp->cmd_tbl_sg;
	306	u32 sg_count;
	307	int i;
	308
	309	sg_count = ((buf_len - 1) / MAX_DATA_BYTE_COUNT) + 1;
4a7cc0f2	310	if (sg_count > AHCI_MAX_SG) {
4782ac80 JZ	311	printf("Error:Too much sg!\n");
	312	return -1;
	313	}
	314
4a7cc0f2 JL	315	for (i = 0; i < sg_count; i++) {
	316	ahci_sg->addr =
	317	cpu_to_le32((u32) buf + i * MAX_DATA_BYTE_COUNT);
4782ac80	318	ahci_sg->addr_hi = 0;
4a7cc0f2 JL	319	ahci_sg->flags_size = cpu_to_le32(0x3fffff &
	320	(buf_len < MAX_DATA_BYTE_COUNT
	321	? (buf_len - 1)
	322	: (MAX_DATA_BYTE_COUNT - 1)));
4782ac80 JZ	323	ahci_sg++;
	324	buf_len -= MAX_DATA_BYTE_COUNT;
	325	}
	326
	327	return sg_count;
	328	}
	329
	330
	331	static void ahci_fill_cmd_slot(struct ahci_ioports *pp, u32 opts)
	332	{
	333	pp->cmd_slot->opts = cpu_to_le32(opts);
	334	pp->cmd_slot->status = 0;
	335	pp->cmd_slot->tbl_addr = cpu_to_le32(pp->cmd_tbl & 0xffffffff);
	336	pp->cmd_slot->tbl_addr_hi = 0;
	337	}
	338
	339
	340	static void ahci_set_feature(u8 port)
	341	{
4782ac80	342	struct ahci_ioports *pp = &(probe_ent->port[port]);
4a7cc0f2 JL	343	volatile u8 port_mmio = (volatile u8 )pp->port_mmio;
4a7cc0f2 JL	344	u32 cmd_fis_len = 5; /* five dwords */
4782ac80 JZ	345	u8 fis[20];
4782ac80 JZ	346
4a7cc0f2 JL	347	/set feature /
4a7cc0f2 JL	348	memset(fis, 0, 20);
4782ac80 JZ	349	fis[0] = 0x27;
	350	fis[1] = 1 << 7;
	351	fis[2] = ATA_CMD_SETF;
	352	fis[3] = SETFEATURES_XFER;
	353	fis[12] = __ilog2(probe_ent->udma_mask + 1) + 0x40 - 0x01;
	354
4a7cc0f2	355	memcpy((unsigned char *)pp->cmd_tbl, fis, 20);
4782ac80 JZ	356	ahci_fill_cmd_slot(pp, cmd_fis_len);
	357	writel(1, port_mmio + PORT_CMD_ISSUE);
	358	readl(port_mmio + PORT_CMD_ISSUE);
	359
4a7cc0f2	360	if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 150, 0x1)) {
4782ac80 JZ	361	printf("set feature error!\n");
	362	}
	363	}
	364
	365
	366	static int ahci_port_start(u8 port)
	367	{
4782ac80	368	struct ahci_ioports *pp = &(probe_ent->port[port]);
4a7cc0f2	369	volatile u8 port_mmio = (volatile u8 )pp->port_mmio;
4782ac80 JZ	370	u32 port_status;
	371	u32 mem;
	372
4a7cc0f2	373	debug("Enter start port: %d\n", port);
4782ac80	374	port_status = readl(port_mmio + PORT_SCR_STAT);
4a7cc0f2 JL	375	debug("Port %d status: %x\n", port, port_status);
4a7cc0f2 JL	376	if ((port_status & 0xf) != 0x03) {
4782ac80 JZ	377	printf("No Link on this port!\n");
	378	return -1;
	379	}
	380
4a7cc0f2	381	mem = (u32) malloc(AHCI_PORT_PRIV_DMA_SZ + 2048);
4782ac80 JZ	382	if (!mem) {
	383	free(pp);
	384	printf("No mem for table!\n");
	385	return -ENOMEM;
	386	}
	387
4a7cc0f2 JL	388	mem = (mem + 0x800) & (~0x7ff); /* Aligned to 2048-bytes */
4a7cc0f2 JL	389	memset((u8 *) mem, 0, AHCI_PORT_PRIV_DMA_SZ);
4782ac80	390
4782ac80 JZ	391	/*
	392	* First item in chunk of DMA memory: 32-slot command table,
	393	* 32 bytes each in size
	394	*/
	395	pp->cmd_slot = (struct ahci_cmd_hdr *)mem;
4a7cc0f2	396	debug("cmd_slot = 0x%x\n", pp->cmd_slot);
4782ac80	397	mem += (AHCI_CMD_SLOT_SZ + 224);
4a7cc0f2	398
4782ac80 JZ	399	/*
	400	* Second item: Received-FIS area
	401	*/
	402	pp->rx_fis = mem;
4782ac80	403	mem += AHCI_RX_FIS_SZ;
4a7cc0f2	404
4782ac80 JZ	405	/*
	406	* Third item: data area for storing a single command
	407	* and its scatter-gather table
	408	*/
	409	pp->cmd_tbl = mem;
4a7cc0f2	410	debug("cmd_tbl_dma = 0x%x\n", pp->cmd_tbl);
4782ac80 JZ	411
	412	mem += AHCI_CMD_TBL_HDR;
	413	pp->cmd_tbl_sg = (struct ahci_sg *)mem;
	414
4a7cc0f2	415	writel_with_flush((u32) pp->cmd_slot, port_mmio + PORT_LST_ADDR);
4782ac80 JZ	416
	417	writel_with_flush(pp->rx_fis, port_mmio + PORT_FIS_ADDR);
	418
	419	writel_with_flush(PORT_CMD_ICC_ACTIVE \| PORT_CMD_FIS_RX \|
4a7cc0f2 JL	420	PORT_CMD_POWER_ON \| PORT_CMD_SPIN_UP \|
4a7cc0f2 JL	421	PORT_CMD_START, port_mmio + PORT_CMD);
4782ac80	422
4a7cc0f2	423	debug("Exit start port %d\n", port);
4782ac80 JZ	424
	425	return 0;
	426	}
	427
	428
4a7cc0f2 JL	429	static int get_ahci_device_data(u8 port, u8 fis, int fis_len, u8 buf,
4a7cc0f2 JL	430	int buf_len)
4782ac80 JZ	431	{
4782ac80 JZ	432
4a7cc0f2 JL	433	struct ahci_ioports *pp = &(probe_ent->port[port]);
4a7cc0f2 JL	434	volatile u8 port_mmio = (volatile u8 )pp->port_mmio;
4782ac80 JZ	435	u32 opts;
	436	u32 port_status;
	437	int sg_count;
	438
4a7cc0f2	439	debug("Enter get_ahci_device_data: for port %d\n", port);
4782ac80	440
4a7cc0f2	441	if (port > probe_ent->n_ports) {
4782ac80 JZ	442	printf("Invaild port number %d\n", port);
	443	return -1;
	444	}
	445
	446	port_status = readl(port_mmio + PORT_SCR_STAT);
4a7cc0f2 JL	447	if ((port_status & 0xf) != 0x03) {
4a7cc0f2 JL	448	debug("No Link on port %d!\n", port);
4782ac80 JZ	449	return -1;
	450	}
	451
	452	memcpy((unsigned char *)pp->cmd_tbl, fis, fis_len);
	453
4a7cc0f2 JL	454	sg_count = ahci_fill_sg(port, buf, buf_len);
4a7cc0f2 JL	455	opts = (fis_len >> 2) \| (sg_count << 16);
4782ac80 JZ	456	ahci_fill_cmd_slot(pp, opts);
	457
	458	writel_with_flush(1, port_mmio + PORT_CMD_ISSUE);
	459
	460	if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 150, 0x1)) {
	461	printf("timeout exit!\n");
	462	return -1;
	463	}
	464	debug("get_ahci_device_data: %d byte transferred.\n",
4a7cc0f2	465	pp->cmd_slot->status);
4782ac80 JZ	466
	467	return 0;
	468	}
	469
	470
	471	static char ata_id_strcpy(u16 target, u16 *src, int len)
	472	{
	473	int i;
4a7cc0f2	474	for (i = 0; i < len / 2; i++)
4782ac80 JZ	475	target[i] = le16_to_cpu(src[i]);
	476	return (char *)target;
	477	}
	478
	479
	480	static void dump_ataid(hd_driveid_t *ataid)
	481	{
	482	debug("(49)ataid->capability = 0x%x\n", ataid->capability);
	483	debug("(53)ataid->field_valid =0x%x\n", ataid->field_valid);
	484	debug("(63)ataid->dma_mword = 0x%x\n", ataid->dma_mword);
	485	debug("(64)ataid->eide_pio_modes = 0x%x\n", ataid->eide_pio_modes);
	486	debug("(75)ataid->queue_depth = 0x%x\n", ataid->queue_depth);
	487	debug("(80)ataid->major_rev_num = 0x%x\n", ataid->major_rev_num);
	488	debug("(81)ataid->minor_rev_num = 0x%x\n", ataid->minor_rev_num);
	489	debug("(82)ataid->command_set_1 = 0x%x\n", ataid->command_set_1);
	490	debug("(83)ataid->command_set_2 = 0x%x\n", ataid->command_set_2);
	491	debug("(84)ataid->cfsse = 0x%x\n", ataid->cfsse);
	492	debug("(85)ataid->cfs_enable_1 = 0x%x\n", ataid->cfs_enable_1);
	493	debug("(86)ataid->cfs_enable_2 = 0x%x\n", ataid->cfs_enable_2);
	494	debug("(87)ataid->csf_default = 0x%x\n", ataid->csf_default);
	495	debug("(88)ataid->dma_ultra = 0x%x\n", ataid->dma_ultra);
	496	debug("(93)ataid->hw_config = 0x%x\n", ataid->hw_config);
	497	}
	498
4a7cc0f2	499
4782ac80 JZ	500	/*
	501	* SCSI INQUIRY command operation.
	502	*/
	503	static int ata_scsiop_inquiry(ccb *pccb)
	504	{
	505	u8 hdr[] = {
	506	0,
	507	0,
4a7cc0f2	508	0x5, /* claim SPC-3 version compatibility */
4782ac80 JZ	509	2,
	510	95 - 4,
	511	};
	512	u8 fis[20];
	513	u8 *tmpid;
	514	u8 port;
	515
	516	/* Clean ccb data buffer */
	517	memset(pccb->pdata, 0, pccb->datalen);
	518
	519	memcpy(pccb->pdata, hdr, sizeof(hdr));
	520
4a7cc0f2	521	if (pccb->datalen <= 35)
4782ac80 JZ	522	return 0;
	523
	524	memset(fis, 0, 20);
	525	/* Construct the FIS */
4a7cc0f2 JL	526	fis[0] = 0x27; /* Host to device FIS. */
	527	fis[1] = 1 << 7; /* Command FIS. */
	528	fis[2] = ATA_CMD_IDENT; /* Command byte. */
4782ac80 JZ	529
	530	/* Read id from sata */
	531	port = pccb->target;
4a7cc0f2	532	if (!(tmpid = malloc(sizeof(hd_driveid_t))))
4782ac80 JZ	533	return -ENOMEM;
4782ac80 JZ	534
4a7cc0f2 JL	535	if (get_ahci_device_data(port, (u8 *) & fis, 20,
4a7cc0f2 JL	536	tmpid, sizeof(hd_driveid_t))) {
4782ac80 JZ	537	debug("scsi_ahci: SCSI inquiry command failure.\n");
	538	return -EIO;
	539	}
	540
4a7cc0f2	541	if (ataid[port])
4782ac80	542	free(ataid[port]);
4a7cc0f2	543	ataid[port] = (hd_driveid_t *) tmpid;
4782ac80 JZ	544
4782ac80 JZ	545	memcpy(&pccb->pdata[8], "ATA ", 8);
4a7cc0f2 JL	546	ata_id_strcpy((u16 ) &pccb->pdata[16], (u16 )ataid[port]->model, 16);
4a7cc0f2 JL	547	ata_id_strcpy((u16 ) &pccb->pdata[32], (u16 )ataid[port]->fw_rev, 4);
4782ac80 JZ	548
	549	dump_ataid(ataid[port]);
	550	return 0;
	551	}
	552
	553
	554	/*
	555	* SCSI READ10 command operation.
	556	*/
4a7cc0f2	557	static int ata_scsiop_read10(ccb * pccb)
4782ac80 JZ	558	{
	559	u64 lba = 0;
	560	u32 len = 0;
	561	u8 fis[20];
	562
4a7cc0f2 JL	563	lba = (((u64) pccb->cmd[2]) << 24) \| (((u64) pccb->cmd[3]) << 16)
	564	\| (((u64) pccb->cmd[4]) << 8) \| ((u64) pccb->cmd[5]);
	565	len = (((u32) pccb->cmd[7]) << 8) \| ((u32) pccb->cmd[8]);
4782ac80 JZ	566
	567	/* For 10-byte and 16-byte SCSI R/W commands, transfer
	568	* length 0 means transfer 0 block of data.
	569	* However, for ATA R/W commands, sector count 0 means
	570	* 256 or 65536 sectors, not 0 sectors as in SCSI.
	571	*
	572	* WARNING: one or two older ATA drives treat 0 as 0...
	573	*/
4a7cc0f2 JL	574	if (!len)
4a7cc0f2 JL	575	return 0;
4782ac80 JZ	576	memset(fis, 0, 20);
	577
	578	/* Construct the FIS */
4a7cc0f2 JL	579	fis[0] = 0x27; /* Host to device FIS. */
4a7cc0f2 JL	580	fis[1] = 1 << 7; /* Command FIS. */
4782ac80 JZ	581	fis[2] = ATA_CMD_RD_DMA; /* Command byte. */
4782ac80 JZ	582
4a7cc0f2	583	/* LBA address, only support LBA28 in this driver */
4782ac80 JZ	584	fis[4] = pccb->cmd[5];
	585	fis[5] = pccb->cmd[4];
	586	fis[6] = pccb->cmd[3];
	587	fis[7] = (pccb->cmd[2] & 0x0f) \| 0xe0;
	588
	589	/* Sector Count */
	590	fis[12] = pccb->cmd[8];
	591	fis[13] = pccb->cmd[7];
	592
	593	/* Read from ahci */
4a7cc0f2 JL	594	if (get_ahci_device_data(pccb->target, (u8 *) & fis, 20,
4a7cc0f2 JL	595	pccb->pdata, pccb->datalen)) {
4782ac80 JZ	596	debug("scsi_ahci: SCSI READ10 command failure.\n");
	597	return -EIO;
	598	}
	599
	600	return 0;
	601	}
	602
	603
	604	/*
	605	* SCSI READ CAPACITY10 command operation.
	606	*/
	607	static int ata_scsiop_read_capacity10(ccb *pccb)
	608	{
	609	u8 buf[8];
	610
4a7cc0f2	611	if (!ataid[pccb->target]) {
4782ac80	612	printf("scsi_ahci: SCSI READ CAPACITY10 command failure. "
4a7cc0f2 JL	613	"\tNo ATA info!\n"
4a7cc0f2 JL	614	"\tPlease run SCSI commmand INQUIRY firstly!\n");
4782ac80 JZ	615	return -EPERM;
	616	}
	617
	618	memset(buf, 0, 8);
	619
4a7cc0f2	620	(u32 ) buf = le32_to_cpu(ataid[pccb->target]->lba_capacity);
4782ac80 JZ	621
	622	buf[6] = 512 >> 8;
	623	buf[7] = 512 & 0xff;
	624
	625	memcpy(pccb->pdata, buf, 8);
	626
	627	return 0;
	628	}
	629
	630
	631	/*
	632	* SCSI TEST UNIT READY command operation.
	633	*/
	634	static int ata_scsiop_test_unit_ready(ccb *pccb)
	635	{
	636	return (ataid[pccb->target]) ? 0 : -EPERM;
	637	}
	638
4a7cc0f2	639
4782ac80 JZ	640	int scsi_exec(ccb *pccb)
	641	{
	642	int ret;
	643
4a7cc0f2	644	switch (pccb->cmd[0]) {
4782ac80 JZ	645	case SCSI_READ10:
	646	ret = ata_scsiop_read10(pccb);
	647	break;
	648	case SCSI_RD_CAPAC:
	649	ret = ata_scsiop_read_capacity10(pccb);
	650	break;
	651	case SCSI_TST_U_RDY:
	652	ret = ata_scsiop_test_unit_ready(pccb);
	653	break;
	654	case SCSI_INQUIRY:
	655	ret = ata_scsiop_inquiry(pccb);
	656	break;
	657	default:
	658	printf("Unsupport SCSI command 0x%02x\n", pccb->cmd[0]);
	659	return FALSE;
	660	}
	661
4a7cc0f2 JL	662	if (ret) {
4a7cc0f2 JL	663	debug("SCSI command 0x%02x ret errno %d\n", pccb->cmd[0], ret);
4782ac80 JZ	664	return FALSE;
	665	}
	666	return TRUE;
	667
	668	}
	669
	670
	671	void scsi_low_level_init(int busdevfunc)
	672	{
	673	int i;
	674	u32 linkmap;
	675
	676	ahci_init_one(busdevfunc);
	677
	678	linkmap = probe_ent->link_port_map;
	679
4a7cc0f2 JL	680	for (i = 0; i < CFG_SCSI_MAX_SCSI_ID; i++) {
	681	if (((linkmap >> i) & 0x01)) {
	682	if (ahci_port_start((u8) i)) {
	683	printf("Can not start port %d\n", i);
4782ac80 JZ	684	continue;
4782ac80 JZ	685	}
4a7cc0f2	686	ahci_set_feature((u8) i);
4782ac80 JZ	687	}
	688	}
	689	}
	690
	691
	692	void scsi_bus_reset(void)
	693	{
4a7cc0f2	694	/Not implement/
4782ac80 JZ	695	}
	696
	697
4a7cc0f2	698	void scsi_print_error(ccb * pccb)
4782ac80	699	{
4a7cc0f2	700	/The ahci error info can be read in the ahci driver/
4782ac80 JZ	701	}
4782ac80 JZ	702	#endif