forked from Minki/linux
sata_promise: ATAPI support
This patch adds ATAPI support to the sata_promise driver. This has been tested on both first- and second-generation chips (20378 and 20575), and with both SATAPI and PATAPI devices. CD-writing works. SATAPI DMA works on second-generation chips, but on first-generation chips SATAPI is limited to PIO due to what appears to be HW limitations. PATAPI DMA works on both first- and second-generation chips, but requires the separate PATA support patch before it can be used on TX2plus chips. The functional changes to the driver are: - remove ATA_FLAG_NO_ATAPI from PDC_COMMON_FLAGS - add ->check_atapi_dma() operation to enable DMA for bulk data transfers but force PIO for other ATAPI commands; this filter is from Promise's driver and largely matches pata_pdc207x.c - use a more restrictive ->check_atapi_dma() on first-generation chips to force SATAPI to always use PIO - add handling of ATAPI protocols to pdc_qc_prep(), pdc_host_intr(), and pdc_qc_issue_prot(): ATAPI_DMA is handled by the driver while non-DMA protocols are handed over to libata generic code - add pdc_issue_atapi_pkt_cmd() to handle the initial steps in issuing ATAPI DMA commands before sending the actual CDB; this procedure was ported from Promise's driver Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Mikael Pettersson
Jeff Garzik
parent
870ae337d5
commit
95006188cb
@ -39,6 +39,7 @@
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/device.h>
|
||||
#include <scsi/scsi.h>
|
||||
#include <scsi/scsi_host.h>
|
||||
#include <scsi/scsi_cmnd.h>
|
||||
#include <linux/libata.h>
|
||||
@ -50,6 +51,14 @@
|
||||
|
||||
|
||||
enum {
|
||||
/* register offsets */
|
||||
PDC_FEATURE = 0x04, /* Feature/Error reg (per port) */
|
||||
PDC_SECTOR_COUNT = 0x08, /* Sector count reg (per port) */
|
||||
PDC_SECTOR_NUMBER = 0x0C, /* Sector number reg (per port) */
|
||||
PDC_CYLINDER_LOW = 0x10, /* Cylinder low reg (per port) */
|
||||
PDC_CYLINDER_HIGH = 0x14, /* Cylinder high reg (per port) */
|
||||
PDC_DEVICE = 0x18, /* Device/Head reg (per port) */
|
||||
PDC_COMMAND = 0x1C, /* Command/status reg (per port) */
|
||||
PDC_PKT_SUBMIT = 0x40, /* Command packet pointer addr */
|
||||
PDC_INT_SEQMASK = 0x40, /* Mask of asserted SEQ INTs */
|
||||
PDC_FLASH_CTL = 0x44, /* Flash control register */
|
||||
@ -71,13 +80,23 @@ enum {
|
||||
|
||||
PDC_HAS_PATA = (1 << 1), /* PDC20375/20575 has PATA */
|
||||
|
||||
/* Sequence counter control registers bit definitions */
|
||||
PDC_SEQCNTRL_INT_MASK = (1 << 5), /* Sequence Interrupt Mask */
|
||||
|
||||
/* Feature register values */
|
||||
PDC_FEATURE_ATAPI_PIO = 0x00, /* ATAPI data xfer by PIO */
|
||||
PDC_FEATURE_ATAPI_DMA = 0x01, /* ATAPI data xfer by DMA */
|
||||
|
||||
/* Device/Head register values */
|
||||
PDC_DEVICE_SATA = 0xE0, /* Device/Head value for SATA devices */
|
||||
|
||||
/* PDC_CTLSTAT bit definitions */
|
||||
PDC_DMA_ENABLE = (1 << 7),
|
||||
PDC_IRQ_DISABLE = (1 << 10),
|
||||
PDC_RESET = (1 << 11), /* HDMA reset */
|
||||
|
||||
PDC_COMMON_FLAGS = ATA_FLAG_NO_LEGACY |
|
||||
ATA_FLAG_MMIO | ATA_FLAG_NO_ATAPI |
|
||||
ATA_FLAG_MMIO |
|
||||
ATA_FLAG_PIO_POLLING,
|
||||
|
||||
/* hp->flags bits */
|
||||
@ -106,6 +125,8 @@ static void pdc_pata_phy_reset(struct ata_port *ap);
|
||||
static void pdc_qc_prep(struct ata_queued_cmd *qc);
|
||||
static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
|
||||
static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
|
||||
static int pdc_check_atapi_dma(struct ata_queued_cmd *qc);
|
||||
static int pdc_old_check_atapi_dma(struct ata_queued_cmd *qc);
|
||||
static void pdc_irq_clear(struct ata_port *ap);
|
||||
static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc);
|
||||
static void pdc_host_stop(struct ata_host *host);
|
||||
@ -140,6 +161,34 @@ static const struct ata_port_operations pdc_sata_ops = {
|
||||
.check_status = ata_check_status,
|
||||
.exec_command = pdc_exec_command_mmio,
|
||||
.dev_select = ata_std_dev_select,
|
||||
.check_atapi_dma = pdc_check_atapi_dma,
|
||||
|
||||
.qc_prep = pdc_qc_prep,
|
||||
.qc_issue = pdc_qc_issue_prot,
|
||||
.freeze = pdc_freeze,
|
||||
.thaw = pdc_thaw,
|
||||
.error_handler = pdc_error_handler,
|
||||
.post_internal_cmd = pdc_post_internal_cmd,
|
||||
.data_xfer = ata_mmio_data_xfer,
|
||||
.irq_handler = pdc_interrupt,
|
||||
.irq_clear = pdc_irq_clear,
|
||||
|
||||
.scr_read = pdc_sata_scr_read,
|
||||
.scr_write = pdc_sata_scr_write,
|
||||
.port_start = pdc_port_start,
|
||||
.port_stop = pdc_port_stop,
|
||||
.host_stop = pdc_host_stop,
|
||||
};
|
||||
|
||||
/* First-generation chips need a more restrictive ->check_atapi_dma op */
|
||||
static const struct ata_port_operations pdc_old_sata_ops = {
|
||||
.port_disable = ata_port_disable,
|
||||
.tf_load = pdc_tf_load_mmio,
|
||||
.tf_read = ata_tf_read,
|
||||
.check_status = ata_check_status,
|
||||
.exec_command = pdc_exec_command_mmio,
|
||||
.dev_select = ata_std_dev_select,
|
||||
.check_atapi_dma = pdc_old_check_atapi_dma,
|
||||
|
||||
.qc_prep = pdc_qc_prep,
|
||||
.qc_issue = pdc_qc_issue_prot,
|
||||
@ -165,6 +214,7 @@ static const struct ata_port_operations pdc_pata_ops = {
|
||||
.check_status = ata_check_status,
|
||||
.exec_command = pdc_exec_command_mmio,
|
||||
.dev_select = ata_std_dev_select,
|
||||
.check_atapi_dma = pdc_check_atapi_dma,
|
||||
|
||||
.phy_reset = pdc_pata_phy_reset,
|
||||
|
||||
@ -188,7 +238,7 @@ static const struct ata_port_info pdc_port_info[] = {
|
||||
.pio_mask = 0x1f, /* pio0-4 */
|
||||
.mwdma_mask = 0x07, /* mwdma0-2 */
|
||||
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
|
||||
.port_ops = &pdc_sata_ops,
|
||||
.port_ops = &pdc_old_sata_ops,
|
||||
},
|
||||
|
||||
/* board_20319 */
|
||||
@ -198,7 +248,7 @@ static const struct ata_port_info pdc_port_info[] = {
|
||||
.pio_mask = 0x1f, /* pio0-4 */
|
||||
.mwdma_mask = 0x07, /* mwdma0-2 */
|
||||
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
|
||||
.port_ops = &pdc_sata_ops,
|
||||
.port_ops = &pdc_old_sata_ops,
|
||||
},
|
||||
|
||||
/* board_20619 */
|
||||
@ -397,6 +447,30 @@ static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
|
||||
writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
|
||||
}
|
||||
|
||||
static void pdc_atapi_dma_pkt(struct ata_taskfile *tf,
|
||||
dma_addr_t sg_table,
|
||||
unsigned int cdb_len, u8 *cdb,
|
||||
u8 *buf)
|
||||
{
|
||||
u32 *buf32 = (u32 *) buf;
|
||||
|
||||
/* set control bits (byte 0), zero delay seq id (byte 3),
|
||||
* and seq id (byte 2)
|
||||
*/
|
||||
if (!(tf->flags & ATA_TFLAG_WRITE))
|
||||
buf32[0] = cpu_to_le32(PDC_PKT_READ);
|
||||
else
|
||||
buf32[0] = 0;
|
||||
buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */
|
||||
buf32[2] = 0; /* no next-packet */
|
||||
|
||||
/* we can represent cdb lengths 2/4/6/8/10/12/14/16 */
|
||||
BUG_ON(cdb_len & ~0x1E);
|
||||
|
||||
buf[12] = (((cdb_len >> 1) & 7) << 5) | ATA_REG_DATA | PDC_LAST_REG;
|
||||
memcpy(buf+13, cdb, cdb_len);
|
||||
}
|
||||
|
||||
static void pdc_qc_prep(struct ata_queued_cmd *qc)
|
||||
{
|
||||
struct pdc_port_priv *pp = qc->ap->private_data;
|
||||
@ -421,6 +495,16 @@ static void pdc_qc_prep(struct ata_queued_cmd *qc)
|
||||
pdc_pkt_footer(&qc->tf, pp->pkt, i);
|
||||
break;
|
||||
|
||||
case ATA_PROT_ATAPI:
|
||||
case ATA_PROT_ATAPI_NODATA:
|
||||
ata_qc_prep(qc);
|
||||
break;
|
||||
|
||||
case ATA_PROT_ATAPI_DMA:
|
||||
ata_qc_prep(qc);
|
||||
pdc_atapi_dma_pkt(&qc->tf, qc->ap->prd_dma, qc->dev->cdb_len, qc->cdb, pp->pkt);
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
@ -534,6 +618,7 @@ static inline unsigned int pdc_host_intr( struct ata_port *ap,
|
||||
switch (qc->tf.protocol) {
|
||||
case ATA_PROT_DMA:
|
||||
case ATA_PROT_NODATA:
|
||||
case ATA_PROT_ATAPI_DMA:
|
||||
qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
|
||||
ata_qc_complete(qc);
|
||||
handled = 1;
|
||||
@ -630,18 +715,105 @@ static inline void pdc_packet_start(struct ata_queued_cmd *qc)
|
||||
readl((void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); /* flush */
|
||||
}
|
||||
|
||||
static unsigned int pdc_wait_for_drq(struct ata_port *ap)
|
||||
{
|
||||
void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
|
||||
unsigned int i;
|
||||
unsigned int status;
|
||||
|
||||
/* Following pdc-ultra's WaitForDrq() we loop here until BSY
|
||||
* is clear and DRQ is set in altstatus. We could possibly call
|
||||
* ata_busy_wait() and loop until DRQ is set, but since we don't
|
||||
* know how much time a call to ata_busy_wait() took, we don't
|
||||
* know when to time out the outer loop.
|
||||
*/
|
||||
for(i = 0; i < 1000; ++i) {
|
||||
status = readb(port_mmio + 0x38); /* altstatus */
|
||||
if (status == 0xFF)
|
||||
break;
|
||||
if (status & ATA_BUSY)
|
||||
;
|
||||
else if (status & (ATA_DRQ | ATA_ERR))
|
||||
break;
|
||||
mdelay(1);
|
||||
}
|
||||
if (i >= 1000)
|
||||
ata_port_printk(ap, KERN_WARNING, "%s timed out", __FUNCTION__);
|
||||
return status;
|
||||
}
|
||||
|
||||
static void pdc_issue_atapi_pkt_cmd(struct ata_queued_cmd *qc)
|
||||
{
|
||||
struct ata_port *ap = qc->ap;
|
||||
void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
|
||||
void __iomem *host_mmio = ap->host->mmio_base;
|
||||
unsigned int nbytes;
|
||||
unsigned int tmp;
|
||||
|
||||
writeb(0x00, port_mmio + PDC_CTLSTAT); /* route drive INT to SEQ 0 */
|
||||
writeb(PDC_SEQCNTRL_INT_MASK, host_mmio + 0); /* but mask SEQ 0 INT */
|
||||
|
||||
/* select drive */
|
||||
if (sata_scr_valid(ap)) {
|
||||
tmp = PDC_DEVICE_SATA;
|
||||
} else {
|
||||
tmp = ATA_DEVICE_OBS;
|
||||
if (qc->dev->devno != 0)
|
||||
tmp |= ATA_DEV1;
|
||||
}
|
||||
writeb(tmp, port_mmio + PDC_DEVICE);
|
||||
ata_busy_wait(ap, ATA_BUSY, 1000);
|
||||
|
||||
writeb(0x00, port_mmio + PDC_SECTOR_COUNT);
|
||||
writeb(0x00, port_mmio + PDC_SECTOR_NUMBER);
|
||||
|
||||
/* set feature and byte counter registers */
|
||||
if (qc->tf.protocol != ATA_PROT_ATAPI_DMA) {
|
||||
tmp = PDC_FEATURE_ATAPI_PIO;
|
||||
/* set byte counter register to real transfer byte count */
|
||||
nbytes = qc->nbytes;
|
||||
if (!nbytes)
|
||||
nbytes = qc->nsect << 9;
|
||||
if (nbytes > 0xffff)
|
||||
nbytes = 0xffff;
|
||||
} else {
|
||||
tmp = PDC_FEATURE_ATAPI_DMA;
|
||||
/* set byte counter register to 0 */
|
||||
nbytes = 0;
|
||||
}
|
||||
writeb(tmp, port_mmio + PDC_FEATURE);
|
||||
writeb(nbytes & 0xFF, port_mmio + PDC_CYLINDER_LOW);
|
||||
writeb((nbytes >> 8) & 0xFF, port_mmio + PDC_CYLINDER_HIGH);
|
||||
|
||||
/* send ATAPI packet command 0xA0 */
|
||||
writeb(ATA_CMD_PACKET, port_mmio + PDC_COMMAND);
|
||||
|
||||
/*
|
||||
* At this point in the issuing of a packet command, the Promise
|
||||
* driver busy-waits for INT (CTLSTAT bit 27) if it detected
|
||||
* (at port init time) that the device interrupts with assertion
|
||||
* of DRQ after receiving a packet command.
|
||||
*
|
||||
* XXX: Do we need to handle this case as well? Does libata detect
|
||||
* this case for us, or do we have to do our own per-port init?
|
||||
*/
|
||||
|
||||
pdc_wait_for_drq(ap);
|
||||
|
||||
/* now the device only waits for the CDB */
|
||||
}
|
||||
|
||||
static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc)
|
||||
{
|
||||
switch (qc->tf.protocol) {
|
||||
case ATA_PROT_ATAPI_DMA:
|
||||
pdc_issue_atapi_pkt_cmd(qc);
|
||||
/*FALLTHROUGH*/
|
||||
case ATA_PROT_DMA:
|
||||
case ATA_PROT_NODATA:
|
||||
pdc_packet_start(qc);
|
||||
return 0;
|
||||
|
||||
case ATA_PROT_ATAPI_DMA:
|
||||
BUG();
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
@ -664,6 +836,42 @@ static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile
|
||||
ata_exec_command(ap, tf);
|
||||
}
|
||||
|
||||
static int pdc_check_atapi_dma(struct ata_queued_cmd *qc)
|
||||
{
|
||||
u8 *scsicmd = qc->scsicmd->cmnd;
|
||||
int pio = 1; /* atapi dma off by default */
|
||||
|
||||
/* Whitelist commands that may use DMA. */
|
||||
switch (scsicmd[0]) {
|
||||
case WRITE_12:
|
||||
case WRITE_10:
|
||||
case WRITE_6:
|
||||
case READ_12:
|
||||
case READ_10:
|
||||
case READ_6:
|
||||
case 0xad: /* READ_DVD_STRUCTURE */
|
||||
case 0xbe: /* READ_CD */
|
||||
pio = 0;
|
||||
}
|
||||
/* -45150 (FFFF4FA2) to -1 (FFFFFFFF) shall use PIO mode */
|
||||
if (scsicmd[0] == WRITE_10) {
|
||||
unsigned int lba;
|
||||
lba = (scsicmd[2] << 24) | (scsicmd[3] << 16) | (scsicmd[4] << 8) | scsicmd[5];
|
||||
if (lba >= 0xFFFF4FA2)
|
||||
pio = 1;
|
||||
}
|
||||
return pio;
|
||||
}
|
||||
|
||||
static int pdc_old_check_atapi_dma(struct ata_queued_cmd *qc)
|
||||
{
|
||||
struct ata_port *ap = qc->ap;
|
||||
|
||||
/* First generation chips cannot use ATAPI DMA on SATA ports */
|
||||
if (sata_scr_valid(ap))
|
||||
return 1;
|
||||
return pdc_check_atapi_dma(qc);
|
||||
}
|
||||
|
||||
static void pdc_ata_setup_port(struct ata_ioports *port, unsigned long base)
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user