diff options
| -rw-r--r-- | drivers/ata/sata_promise.c | 162 |
1 files changed, 60 insertions, 102 deletions
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c index 4c09d6504f0c..9d73cb9de42a 100644 --- a/drivers/ata/sata_promise.c +++ b/drivers/ata/sata_promise.c @@ -448,28 +448,80 @@ 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) +static void pdc_atapi_dma_pkt(struct ata_queued_cmd *qc) { + struct ata_port *ap = qc->ap; + dma_addr_t sg_table = ap->prd_dma; + unsigned int cdb_len = qc->dev->cdb_len; + u8 *cdb = qc->cdb; + struct pdc_port_priv *pp = ap->private_data; + u8 *buf = pp->pkt; u32 *buf32 = (u32 *) buf; + unsigned int dev_sel, feature, nbytes; /* set control bits (byte 0), zero delay seq id (byte 3), * and seq id (byte 2) */ - if (!(tf->flags & ATA_TFLAG_WRITE)) + if (!(qc->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 */ + /* select drive */ + if (sata_scr_valid(ap)) { + dev_sel = PDC_DEVICE_SATA; + } else { + dev_sel = ATA_DEVICE_OBS; + if (qc->dev->devno != 0) + dev_sel |= ATA_DEV1; + } + buf[12] = (1 << 5) | ATA_REG_DEVICE; + buf[13] = dev_sel; + buf[14] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_CLEAR_BSY; + buf[15] = dev_sel; /* once more, waiting for BSY to clear */ + + buf[16] = (1 << 5) | ATA_REG_NSECT; + buf[17] = 0x00; + buf[18] = (1 << 5) | ATA_REG_LBAL; + buf[19] = 0x00; + + /* set feature and byte counter registers */ + if (qc->tf.protocol != ATA_PROT_ATAPI_DMA) { + feature = 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 { + feature = PDC_FEATURE_ATAPI_DMA; + /* set byte counter register to 0 */ + nbytes = 0; + } + buf[20] = (1 << 5) | ATA_REG_FEATURE; + buf[21] = feature; + buf[22] = (1 << 5) | ATA_REG_BYTEL; + buf[23] = nbytes & 0xFF; + buf[24] = (1 << 5) | ATA_REG_BYTEH; + buf[25] = (nbytes >> 8) & 0xFF; + + /* send ATAPI packet command 0xA0 */ + buf[26] = (1 << 5) | ATA_REG_CMD; + buf[27] = ATA_CMD_PACKET; + + /* select drive and check DRQ */ + buf[28] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_WAIT_DRDY; + buf[29] = dev_sel; + /* 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); + /* append the CDB as the final part */ + buf[30] = (((cdb_len >> 1) & 7) << 5) | ATA_REG_DATA | PDC_LAST_REG; + memcpy(buf+31, cdb, cdb_len); } static void pdc_qc_prep(struct ata_queued_cmd *qc) @@ -503,7 +555,7 @@ static void pdc_qc_prep(struct ata_queued_cmd *qc) 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); + pdc_atapi_dma_pkt(qc); break; default: @@ -716,104 +768,10 @@ 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 + PDC_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\n", __FUNCTION__); - return status; -} - -static unsigned int pdc_wait_on_busy(struct ata_port *ap) -{ - unsigned int status = ata_busy_wait(ap, ATA_BUSY, 1000); - if (status != 0xff && (status & ATA_BUSY)) - ata_port_printk(ap, KERN_WARNING, "%s timed out\n", __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); - pdc_wait_on_busy(ap); - - 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); - - /* pdc_qc_issue_prot() currently sends ATAPI PIO packets back - * to libata. If we start handling those packets ourselves, - * then we must busy-wait for INT (CTLSTAT bit 27) at this point - * if the device has ATA_DFLAG_CDB_INTR set. - */ - - 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); |