diff options
Diffstat (limited to 'drivers/ata/sata_promise.c')
| -rw-r--r-- | drivers/ata/sata_promise.c | 109 |
1 files changed, 88 insertions, 21 deletions
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c index f251a5f569d5..11c1afea2db2 100644 --- a/drivers/ata/sata_promise.c +++ b/drivers/ata/sata_promise.c @@ -46,7 +46,7 @@ #include "sata_promise.h" #define DRV_NAME "sata_promise" -#define DRV_VERSION "2.11" +#define DRV_VERSION "2.12" enum { PDC_MAX_PORTS = 4, @@ -145,7 +145,9 @@ static int pdc_old_sata_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_freeze(struct ata_port *ap); +static void pdc_sata_freeze(struct ata_port *ap); static void pdc_thaw(struct ata_port *ap); +static void pdc_sata_thaw(struct ata_port *ap); static void pdc_pata_error_handler(struct ata_port *ap); static void pdc_sata_error_handler(struct ata_port *ap); static void pdc_post_internal_cmd(struct ata_queued_cmd *qc); @@ -180,8 +182,8 @@ static const struct ata_port_operations pdc_sata_ops = { .qc_prep = pdc_qc_prep, .qc_issue = pdc_qc_issue_prot, - .freeze = pdc_freeze, - .thaw = pdc_thaw, + .freeze = pdc_sata_freeze, + .thaw = pdc_sata_thaw, .error_handler = pdc_sata_error_handler, .post_internal_cmd = pdc_post_internal_cmd, .cable_detect = pdc_sata_cable_detect, @@ -205,8 +207,8 @@ static const struct ata_port_operations pdc_old_sata_ops = { .qc_prep = pdc_qc_prep, .qc_issue = pdc_qc_issue_prot, - .freeze = pdc_freeze, - .thaw = pdc_thaw, + .freeze = pdc_sata_freeze, + .thaw = pdc_sata_thaw, .error_handler = pdc_sata_error_handler, .post_internal_cmd = pdc_post_internal_cmd, .cable_detect = pdc_sata_cable_detect, @@ -631,6 +633,41 @@ static void pdc_qc_prep(struct ata_queued_cmd *qc) } } +static int pdc_is_sataii_tx4(unsigned long flags) +{ + const unsigned long mask = PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS; + return (flags & mask) == mask; +} + +static unsigned int pdc_port_no_to_ata_no(unsigned int port_no, + int is_sataii_tx4) +{ + static const unsigned char sataii_tx4_port_remap[4] = { 3, 1, 0, 2}; + return is_sataii_tx4 ? sataii_tx4_port_remap[port_no] : port_no; +} + +static unsigned int pdc_sata_nr_ports(const struct ata_port *ap) +{ + return (ap->flags & PDC_FLAG_4_PORTS) ? 4 : 2; +} + +static unsigned int pdc_sata_ata_port_to_ata_no(const struct ata_port *ap) +{ + const struct ata_host *host = ap->host; + unsigned int nr_ports = pdc_sata_nr_ports(ap); + unsigned int i; + + for(i = 0; i < nr_ports && host->ports[i] != ap; ++i) + ; + BUG_ON(i >= nr_ports); + return pdc_port_no_to_ata_no(i, pdc_is_sataii_tx4(ap->flags)); +} + +static unsigned int pdc_sata_hotplug_offset(const struct ata_port *ap) +{ + return (ap->flags & PDC_FLAG_GEN_II) ? PDC2_SATA_PLUG_CSR : PDC_SATA_PLUG_CSR; +} + static void pdc_freeze(struct ata_port *ap) { void __iomem *mmio = ap->ioaddr.cmd_addr; @@ -643,6 +680,29 @@ static void pdc_freeze(struct ata_port *ap) readl(mmio + PDC_CTLSTAT); /* flush */ } +static void pdc_sata_freeze(struct ata_port *ap) +{ + struct ata_host *host = ap->host; + void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR]; + unsigned int hotplug_offset = pdc_sata_hotplug_offset(ap); + unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap); + u32 hotplug_status; + + /* Disable hotplug events on this port. + * + * Locking: + * 1) hotplug register accesses must be serialised via host->lock + * 2) ap->lock == &ap->host->lock + * 3) ->freeze() and ->thaw() are called with ap->lock held + */ + hotplug_status = readl(host_mmio + hotplug_offset); + hotplug_status |= 0x11 << (ata_no + 16); + writel(hotplug_status, host_mmio + hotplug_offset); + readl(host_mmio + hotplug_offset); /* flush */ + + pdc_freeze(ap); +} + static void pdc_thaw(struct ata_port *ap) { void __iomem *mmio = ap->ioaddr.cmd_addr; @@ -658,6 +718,26 @@ static void pdc_thaw(struct ata_port *ap) readl(mmio + PDC_CTLSTAT); /* flush */ } +static void pdc_sata_thaw(struct ata_port *ap) +{ + struct ata_host *host = ap->host; + void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR]; + unsigned int hotplug_offset = pdc_sata_hotplug_offset(ap); + unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap); + u32 hotplug_status; + + pdc_thaw(ap); + + /* Enable hotplug events on this port. + * Locking: see pdc_sata_freeze(). + */ + hotplug_status = readl(host_mmio + hotplug_offset); + hotplug_status |= 0x11 << ata_no; + hotplug_status &= ~(0x11 << (ata_no + 16)); + writel(hotplug_status, host_mmio + hotplug_offset); + readl(host_mmio + hotplug_offset); /* flush */ +} + static void pdc_common_error_handler(struct ata_port *ap, ata_reset_fn_t hardreset) { if (!(ap->pflags & ATA_PFLAG_FROZEN)) @@ -765,19 +845,6 @@ static void pdc_irq_clear(struct ata_port *ap) readl(mmio + PDC_INT_SEQMASK); } -static int pdc_is_sataii_tx4(unsigned long flags) -{ - const unsigned long mask = PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS; - return (flags & mask) == mask; -} - -static unsigned int pdc_port_no_to_ata_no(unsigned int port_no, - int is_sataii_tx4) -{ - static const unsigned char sataii_tx4_port_remap[4] = { 3, 1, 0, 2}; - return is_sataii_tx4 ? sataii_tx4_port_remap[port_no] : port_no; -} - static irqreturn_t pdc_interrupt(int irq, void *dev_instance) { struct ata_host *host = dev_instance; @@ -799,6 +866,8 @@ static irqreturn_t pdc_interrupt(int irq, void *dev_instance) mmio_base = host->iomap[PDC_MMIO_BAR]; + spin_lock(&host->lock); + /* read and clear hotplug flags for all ports */ if (host->ports[0]->flags & PDC_FLAG_GEN_II) hotplug_offset = PDC2_SATA_PLUG_CSR; @@ -814,11 +883,9 @@ static irqreturn_t pdc_interrupt(int irq, void *dev_instance) if (mask == 0xffffffff && hotplug_status == 0) { VPRINTK("QUICK EXIT 2\n"); - return IRQ_NONE; + goto done_irq; } - spin_lock(&host->lock); - mask &= 0xffff; /* only 16 tags possible */ if (mask == 0 && hotplug_status == 0) { VPRINTK("QUICK EXIT 3\n"); |