Add support for 8bit reads/writes to SSB. Index: linux-2.6.25.1/drivers/ssb/main.c =================================================================== --- linux-2.6.25.1.orig/drivers/ssb/main.c 2008-05-10 09:04:53.000000000 +0100 +++ linux-2.6.25.1/drivers/ssb/main.c 2008-05-10 09:05:38.000000000 +0100 @@ -508,6 +508,14 @@ error: return err; } +static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset) +{ + struct ssb_bus *bus = dev->bus; + + offset += dev->core_index * SSB_CORE_SIZE; + return readb(bus->mmio + offset); +} + static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset) { struct ssb_bus *bus = dev->bus; @@ -524,6 +532,14 @@ static u32 ssb_ssb_read32(struct ssb_dev return readl(bus->mmio + offset); } +static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value) +{ + struct ssb_bus *bus = dev->bus; + + offset += dev->core_index * SSB_CORE_SIZE; + writeb(value, bus->mmio + offset); +} + static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value) { struct ssb_bus *bus = dev->bus; @@ -542,8 +558,10 @@ static void ssb_ssb_write32(struct ssb_d /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */ static const struct ssb_bus_ops ssb_ssb_ops = { + .read8 = ssb_ssb_read8, .read16 = ssb_ssb_read16, .read32 = ssb_ssb_read32, + .write8 = ssb_ssb_write8, .write16 = ssb_ssb_write16, .write32 = ssb_ssb_write32, }; Index: linux-2.6.25.1/drivers/ssb/pci.c =================================================================== --- linux-2.6.25.1.orig/drivers/ssb/pci.c 2008-05-10 09:04:53.000000000 +0100 +++ linux-2.6.25.1/drivers/ssb/pci.c 2008-05-10 09:05:38.000000000 +0100 @@ -577,6 +577,19 @@ static inline int ssb_pci_assert_buspowe } #endif /* DEBUG */ +static u8 ssb_pci_read8(struct ssb_device *dev, u16 offset) +{ + struct ssb_bus *bus = dev->bus; + + if (unlikely(ssb_pci_assert_buspower(bus))) + return 0xFF; + if (unlikely(bus->mapped_device != dev)) { + if (unlikely(ssb_pci_switch_core(bus, dev))) + return 0xFF; + } + return ioread8(bus->mmio + offset); +} + static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset) { struct ssb_bus *bus = dev->bus; @@ -603,6 +616,19 @@ static u32 ssb_pci_read32(struct ssb_dev return ioread32(bus->mmio + offset); } +static void ssb_pci_write8(struct ssb_device *dev, u16 offset, u8 value) +{ + struct ssb_bus *bus = dev->bus; + + if (unlikely(ssb_pci_assert_buspower(bus))) + return; + if (unlikely(bus->mapped_device != dev)) { + if (unlikely(ssb_pci_switch_core(bus, dev))) + return; + } + iowrite8(value, bus->mmio + offset); +} + static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value) { struct ssb_bus *bus = dev->bus; @@ -631,8 +657,10 @@ static void ssb_pci_write32(struct ssb_d /* Not "static", as it's used in main.c */ const struct ssb_bus_ops ssb_pci_ops = { + .read8 = ssb_pci_read8, .read16 = ssb_pci_read16, .read32 = ssb_pci_read32, + .write8 = ssb_pci_write8, .write16 = ssb_pci_write16, .write32 = ssb_pci_write32, }; Index: linux-2.6.25.1/drivers/ssb/pcmcia.c =================================================================== --- linux-2.6.25.1.orig/drivers/ssb/pcmcia.c 2008-05-10 09:04:53.000000000 +0100 +++ linux-2.6.25.1/drivers/ssb/pcmcia.c 2008-05-10 09:05:38.000000000 +0100 @@ -172,6 +172,22 @@ static int select_core_and_segment(struc return 0; } +static u8 ssb_pcmcia_read8(struct ssb_device *dev, u16 offset) +{ + struct ssb_bus *bus = dev->bus; + unsigned long flags; + int err; + u8 value = 0xFF; + + spin_lock_irqsave(&bus->bar_lock, flags); + err = select_core_and_segment(dev, &offset); + if (likely(!err)) + value = readb(bus->mmio + offset); + spin_unlock_irqrestore(&bus->bar_lock, flags); + + return value; +} + static u16 ssb_pcmcia_read16(struct ssb_device *dev, u16 offset) { struct ssb_bus *bus = dev->bus; @@ -206,6 +222,20 @@ static u32 ssb_pcmcia_read32(struct ssb_ return (lo | (hi << 16)); } +static void ssb_pcmcia_write8(struct ssb_device *dev, u16 offset, u8 value) +{ + struct ssb_bus *bus = dev->bus; + unsigned long flags; + int err; + + spin_lock_irqsave(&bus->bar_lock, flags); + err = select_core_and_segment(dev, &offset); + if (likely(!err)) + writeb(value, bus->mmio + offset); + mmiowb(); + spin_unlock_irqrestore(&bus->bar_lock, flags); +} + static void ssb_pcmcia_write16(struct ssb_device *dev, u16 offset, u16 value) { struct ssb_bus *bus = dev->bus; @@ -238,8 +268,10 @@ static void ssb_pcmcia_write32(struct ss /* Not "static", as it's used in main.c */ const struct ssb_bus_ops ssb_pcmcia_ops = { + .read8 = ssb_pcmcia_read8, .read16 = ssb_pcmcia_read16, .read32 = ssb_pcmcia_read32, + .write8 = ssb_pcmcia_write8, .write16 = ssb_pcmcia_write16, .write32 = ssb_pcmcia_write32, }; Index: linux-2.6.25.1/include/linux/ssb/ssb.h =================================================================== --- linux-2.6.25.1.orig/include/linux/ssb/ssb.h 2008-05-10 09:04:53.000000000 +0100 +++ linux-2.6.25.1/include/linux/ssb/ssb.h 2008-05-10 09:05:38.000000000 +0100 @@ -72,8 +72,10 @@ struct ssb_device; /* Lowlevel read/write operations on the device MMIO. * Internal, don't use that outside of ssb. */ struct ssb_bus_ops { + u8 (*read8)(struct ssb_device *dev, u16 offset); u16 (*read16)(struct ssb_device *dev, u16 offset); u32 (*read32)(struct ssb_device *dev, u16 offset); + void (*write8)(struct ssb_device *dev, u16 offset, u8 value); void (*write16)(struct ssb_device *dev, u16 offset, u16 value); void (*write32)(struct ssb_device *dev, u16 offset, u32 value); }; @@ -348,6 +350,10 @@ void ssb_device_disable(struct ssb_devic /* Device MMIO register read/write functions. */ +static inline u8 ssb_read8(struct ssb_device *dev, u16 offset) +{ + return dev->ops->read8(dev, offset); +} static inline u16 ssb_read16(struct ssb_device *dev, u16 offset) { return dev->ops->read16(dev, offset); @@ -356,6 +362,10 @@ static inline u32 ssb_read32(struct ssb_ { return dev->ops->read32(dev, offset); } +static inline void ssb_write8(struct ssb_device *dev, u16 offset, u8 value) +{ + dev->ops->write8(dev, offset, value); +} static inline void ssb_write16(struct ssb_device *dev, u16 offset, u16 value) { dev->ops->write16(dev, offset, value);