diff options
Diffstat (limited to 'target/linux/generic-2.6/files/drivers/ssb/pci.c')
| -rw-r--r-- | target/linux/generic-2.6/files/drivers/ssb/pci.c | 78 |
1 files changed, 65 insertions, 13 deletions
diff --git a/target/linux/generic-2.6/files/drivers/ssb/pci.c b/target/linux/generic-2.6/files/drivers/ssb/pci.c index f9dc28f51..0ab095c65 100644 --- a/target/linux/generic-2.6/files/drivers/ssb/pci.c +++ b/target/linux/generic-2.6/files/drivers/ssb/pci.c @@ -23,6 +23,11 @@ #include "ssb_private.h" +/* Define the following to 1 to enable a printk on each coreswitch. */ +#define SSB_VERBOSE_PCICORESWITCH_DEBUG 0 + + +/* Lowlevel coreswitching */ int ssb_pci_switch_coreidx(struct ssb_bus *bus, u8 coreidx) { int err; @@ -60,10 +65,12 @@ int ssb_pci_switch_core(struct ssb_bus *bus, int err; unsigned long flags; - ssb_dprintk(KERN_INFO PFX - "Switching to %s core, index %d\n", - ssb_core_name(dev->id.coreid), - dev->core_index); +#if SSB_VERBOSE_PCICORESWITCH_DEBUG + ssb_printk(KERN_INFO PFX + "Switching to %s core, index %d\n", + ssb_core_name(dev->id.coreid), + dev->core_index); +#endif spin_lock_irqsave(&bus->bar_lock, flags); err = ssb_pci_switch_coreidx(bus, dev->core_index); @@ -74,6 +81,7 @@ int ssb_pci_switch_core(struct ssb_bus *bus, return err; } +/* Enable/disable the on board crystal oscillator and/or PLL. */ int ssb_pci_xtal(struct ssb_bus *bus, u32 what, int turn_on) { int err; @@ -158,7 +166,9 @@ err_pci: goto out; } +/* Get the word-offset for a SSB_SPROM_XXX define. */ #define SPOFF(offset) (((offset) - SSB_SPROM_BASE) / sizeof(u16)) +/* Helper to extract some _offset, which is one of the SSB_SPROM_XXX defines. */ #define SPEX(_outvar, _offset, _mask, _shift) \ out->_outvar = ((in[SPOFF(_offset)] & (_mask)) >> (_shift)) @@ -296,15 +306,15 @@ static void sprom_extract_r1(struct ssb_sprom_r1 *out, const u16 *in) SPEX(pci_pid, SSB_SPROM1_PID, 0xFFFF, 0); for (i = 0; i < 3; i++) { v = in[SPOFF(SSB_SPROM1_IL0MAC) + i]; - *(((u16 *)out->il0mac) + i) = cpu_to_be16(v); + *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v); } for (i = 0; i < 3; i++) { v = in[SPOFF(SSB_SPROM1_ET0MAC) + i]; - *(((u16 *)out->et0mac) + i) = cpu_to_be16(v); + *(((__be16 *)out->et0mac) + i) = cpu_to_be16(v); } for (i = 0; i < 3; i++) { v = in[SPOFF(SSB_SPROM1_ET1MAC) + i]; - *(((u16 *)out->et1mac) + i) = cpu_to_be16(v); + *(((__be16 *)out->et1mac) + i) = cpu_to_be16(v); } SPEX(et0phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0A, 0); SPEX(et1phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1A, @@ -342,7 +352,7 @@ static void sprom_extract_r1(struct ssb_sprom_r1 *out, const u16 *in) SSB_SPROM1_AGAIN_BG_SHIFT); for (i = 0; i < 4; i++) { v = in[SPOFF(SSB_SPROM1_OEM) + i]; - *(((u16 *)out->oem) + i) = cpu_to_le16(v); + *(((__le16 *)out->oem) + i) = cpu_to_le16(v); } } @@ -364,7 +374,7 @@ static void sprom_extract_r2(struct ssb_sprom_r2 *out, const u16 *in) SPEX(ofdm_pwr_off, SSB_SPROM2_OPO, SSB_SPROM2_OPO_VALUE, 0); for (i = 0; i < 4; i++) { v = in[SPOFF(SSB_SPROM2_CCODE) + i]; - *(((u16 *)out->country_str) + i) = cpu_to_le16(v); + *(((__le16 *)out->country_str) + i) = cpu_to_le16(v); } } @@ -489,50 +499,81 @@ out: return err; } +#ifdef CONFIG_SSB_DEBUG +static int ssb_pci_assert_buspower(struct ssb_bus *bus) +{ + if (likely(bus->powered_up)) + return 0; + + printk(KERN_ERR PFX "FATAL ERROR: Bus powered down " + "while accessing PCI MMIO space\n"); + if (bus->power_warn_count <= 10) { + bus->power_warn_count++; + dump_stack(); + } + + return -ENODEV; +} +#else /* DEBUG */ +static inline int ssb_pci_assert_buspower(struct ssb_bus *bus) +{ + return 0; +} +#endif /* DEBUG */ + static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset) { struct ssb_bus *bus = dev->bus; + if (unlikely(ssb_pci_assert_buspower(bus))) + return 0xFFFF; if (unlikely(bus->mapped_device != dev)) { if (unlikely(ssb_pci_switch_core(bus, dev))) return 0xFFFF; } - return readw(bus->mmio + offset); + return ioread16(bus->mmio + offset); } static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset) { struct ssb_bus *bus = dev->bus; + if (unlikely(ssb_pci_assert_buspower(bus))) + return 0xFFFFFFFF; if (unlikely(bus->mapped_device != dev)) { if (unlikely(ssb_pci_switch_core(bus, dev))) return 0xFFFFFFFF; } - return readl(bus->mmio + offset); + return ioread32(bus->mmio + offset); } static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 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; } - writew(value, bus->mmio + offset); + iowrite16(value, bus->mmio + offset); } static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 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; } - writel(value, bus->mmio + offset); + iowrite32(value, bus->mmio + offset); } +/* Not "static", as it's used in main.c */ const struct ssb_bus_ops ssb_pci_ops = { .read16 = ssb_pci_read16, .read32 = ssb_pci_read32, @@ -590,6 +631,9 @@ static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev, if (!sprom) goto out; + /* Use interruptible locking, as the SPROM write might + * be holding the lock for several seconds. So allow userspace + * to cancel operation. */ err = -ERESTARTSYS; if (mutex_lock_interruptible(&bus->pci_sprom_mutex)) goto out_kfree; @@ -632,10 +676,18 @@ static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev, goto out_kfree; } + /* Use interruptible locking, as the SPROM write might + * be holding the lock for several seconds. So allow userspace + * to cancel operation. */ err = -ERESTARTSYS; if (mutex_lock_interruptible(&bus->pci_sprom_mutex)) goto out_kfree; err = ssb_devices_freeze(bus); + if (err == -EOPNOTSUPP) { + ssb_printk(KERN_ERR PFX "SPROM write: Could not freeze devices. " + "No suspend support. Is CONFIG_PM enabled?\n"); + goto out_unlock; + } if (err) { ssb_printk(KERN_ERR PFX "SPROM write: Could not freeze all devices\n"); goto out_unlock; |