From e42a542ba9cca594897176020445023c54d903d6 Mon Sep 17 00:00:00 2001 From: Sergei Shtylyov Date: Fri, 7 May 2010 22:49:02 +0400 Subject: libata: make sff_irq_on() method optional Now, with the introduction of the sff_set_devctl() method, we can use it in sff_irq_on() method too -- that way its implementations in 'pata_bf54x' and 'pata_scc' become virtually identical to ata_sff_irq_on(). The sff_irq_on() method now becomes quite superfluous, and the only reason not to remove it completely is the existence of the 'pata_octeon_cf' driver which implements it as an empty function. Just make the method optional then, with ata_sff_irq_on() becoming generic taskfile-bound function, still global for the 'pata_bf54x' driver to be able to call it from its thaw() and postreset() methods. While at it, make the sff_irq_on() method and ata_sff_irq_on() return 'void' as the result is always ignored anyway. Signed-off-by: Sergei Shtylyov Signed-off-by: Jeff Garzik --- drivers/ata/libata-sff.c | 26 +++++++++++++++----------- drivers/ata/pata_bf54x.c | 29 ++--------------------------- drivers/ata/pata_octeon_cf.c | 3 +-- drivers/ata/pata_scc.c | 24 ------------------------ 4 files changed, 18 insertions(+), 64 deletions(-) (limited to 'drivers/ata') diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index 31b495fcd969..b7f7f8557fee 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -63,7 +63,6 @@ const struct ata_port_operations ata_sff_port_ops = { .sff_tf_read = ata_sff_tf_read, .sff_exec_command = ata_sff_exec_command, .sff_data_xfer = ata_sff_data_xfer, - .sff_irq_on = ata_sff_irq_on, .sff_irq_clear = ata_sff_irq_clear, .lost_interrupt = ata_sff_lost_interrupt, @@ -538,24 +537,29 @@ void ata_dev_select(struct ata_port *ap, unsigned int device, * Enable interrupts on a legacy IDE device using MMIO or PIO, * wait for idle, clear any pending interrupts. * + * Note: may NOT be used as the sff_irq_on() entry in + * ata_port_operations. + * * LOCKING: * Inherited from caller. */ -u8 ata_sff_irq_on(struct ata_port *ap) +void ata_sff_irq_on(struct ata_port *ap) { struct ata_ioports *ioaddr = &ap->ioaddr; - u8 tmp; + + if (ap->ops->sff_irq_on) { + ap->ops->sff_irq_on(ap); + return; + } ap->ctl &= ~ATA_NIEN; ap->last_ctl = ap->ctl; - if (ioaddr->ctl_addr) - iowrite8(ap->ctl, ioaddr->ctl_addr); - tmp = ata_wait_idle(ap); + if (ap->ops->sff_set_devctl || ioaddr->ctl_addr) + ata_sff_set_devctl(ap, ap->ctl); + ata_wait_idle(ap); ap->ops->sff_irq_clear(ap); - - return tmp; } EXPORT_SYMBOL_GPL(ata_sff_irq_on); @@ -1186,7 +1190,7 @@ static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) qc = ata_qc_from_tag(ap, qc->tag); if (qc) { if (likely(!(qc->err_mask & AC_ERR_HSM))) { - ap->ops->sff_irq_on(ap); + ata_sff_irq_on(ap); ata_qc_complete(qc); } else ata_port_freeze(ap); @@ -1202,7 +1206,7 @@ static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) } else { if (in_wq) { spin_lock_irqsave(ap->lock, flags); - ap->ops->sff_irq_on(ap); + ata_sff_irq_on(ap); ata_qc_complete(qc); spin_unlock_irqrestore(ap->lock, flags); } else @@ -1946,7 +1950,7 @@ void ata_sff_thaw(struct ata_port *ap) /* clear & re-enable interrupts */ ap->ops->sff_check_status(ap); ap->ops->sff_irq_clear(ap); - ap->ops->sff_irq_on(ap); + ata_sff_irq_on(ap); } EXPORT_SYMBOL_GPL(ata_sff_thaw); diff --git a/drivers/ata/pata_bf54x.c b/drivers/ata/pata_bf54x.c index 198307534d90..07c110470e25 100644 --- a/drivers/ata/pata_bf54x.c +++ b/drivers/ata/pata_bf54x.c @@ -1227,30 +1227,6 @@ static void bfin_irq_clear(struct ata_port *ap) | MULTI_TERM_INT | UDMAIN_TERM_INT | UDMAOUT_TERM_INT); } -/** - * bfin_irq_on - Enable interrupts on a port. - * @ap: Port on which interrupts are enabled. - * - * Note: Original code is ata_sff_irq_on(). - */ - -static unsigned char bfin_irq_on(struct ata_port *ap) -{ - void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; - u8 tmp; - - dev_dbg(ap->dev, "in atapi irq on\n"); - ap->ctl &= ~ATA_NIEN; - ap->last_ctl = ap->ctl; - - write_atapi_register(base, ATA_REG_CTRL, ap->ctl); - tmp = ata_wait_idle(ap); - - bfin_irq_clear(ap); - - return tmp; -} - /** * bfin_thaw - Thaw DMA controller port * @ap: port to thaw @@ -1262,7 +1238,7 @@ void bfin_thaw(struct ata_port *ap) { dev_dbg(ap->dev, "in atapi dma thaw\n"); bfin_check_status(ap); - bfin_irq_on(ap); + ata_sff_irq_on(ap); } /** @@ -1279,7 +1255,7 @@ static void bfin_postreset(struct ata_link *link, unsigned int *classes) void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; /* re-enable interrupts */ - bfin_irq_on(ap); + ata_sff_irq_on(ap); /* is double-select really necessary? */ if (classes[0] != ATA_DEV_NONE) @@ -1477,7 +1453,6 @@ static struct ata_port_operations bfin_pata_ops = { .postreset = bfin_postreset, .sff_irq_clear = bfin_irq_clear, - .sff_irq_on = bfin_irq_on, .port_start = bfin_port_start, .port_stop = bfin_port_stop, diff --git a/drivers/ata/pata_octeon_cf.c b/drivers/ata/pata_octeon_cf.c index 005a44483a7b..303ca7e82408 100644 --- a/drivers/ata/pata_octeon_cf.c +++ b/drivers/ata/pata_octeon_cf.c @@ -489,9 +489,8 @@ static void octeon_cf_exec_command16(struct ata_port *ap, ata_wait_idle(ap); } -static u8 octeon_cf_irq_on(struct ata_port *ap) +static void octeon_cf_irq_on(struct ata_port *ap) { - return 0; } static void octeon_cf_irq_clear(struct ata_port *ap) diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c index 86b25fef34a9..d3988991ca68 100644 --- a/drivers/ata/pata_scc.c +++ b/drivers/ata/pata_scc.c @@ -827,29 +827,6 @@ static unsigned int scc_data_xfer (struct ata_device *dev, unsigned char *buf, return words << 1; } -/** - * scc_irq_on - Enable interrupts on a port. - * @ap: Port on which interrupts are enabled. - * - * Note: Original code is ata_sff_irq_on(). - */ - -static u8 scc_irq_on (struct ata_port *ap) -{ - struct ata_ioports *ioaddr = &ap->ioaddr; - u8 tmp; - - ap->ctl &= ~ATA_NIEN; - ap->last_ctl = ap->ctl; - - out_be32(ioaddr->ctl_addr, ap->ctl); - tmp = ata_wait_idle(ap); - - ap->ops->sff_irq_clear(ap); - - return tmp; -} - /** * scc_pata_prereset - prepare for reset * @ap: ATA port to be reset @@ -977,7 +954,6 @@ static struct ata_port_operations scc_pata_ops = { .post_internal_cmd = scc_bmdma_stop, .sff_irq_clear = scc_irq_clear, - .sff_irq_on = scc_irq_on, .port_start = scc_port_start, .port_stop = scc_port_stop, -- cgit v1.2.2