diff options
| -rw-r--r-- | arch/mips/pci/pci-alchemy.c | 137 |
1 files changed, 67 insertions, 70 deletions
diff --git a/arch/mips/pci/pci-alchemy.c b/arch/mips/pci/pci-alchemy.c index b5ce041cdaf..b5eddf533c0 100644 --- a/arch/mips/pci/pci-alchemy.c +++ b/arch/mips/pci/pci-alchemy.c @@ -13,6 +13,7 @@ #include <linux/platform_device.h> #include <linux/kernel.h> #include <linux/init.h> +#include <linux/syscore_ops.h> #include <linux/vmalloc.h> #include <asm/mach-au1x00/au1000.h> @@ -41,6 +42,12 @@ struct alchemy_pci_context { int (*board_pci_idsel)(unsigned int devsel, int assert); }; +/* for syscore_ops. There's only one PCI controller on Alchemy chips, so this + * should suffice for now. + */ +static struct alchemy_pci_context *__alchemy_pci_ctx; + + /* IO/MEM resources for PCI. Keep the memres in sync with __fixup_bigphys_addr * in arch/mips/alchemy/common/setup.c */ @@ -99,18 +106,6 @@ static int config_access(unsigned char access_type, struct pci_bus *bus, return -1; } - /* YAMON on all db1xxx boards wipes the TLB and writes zero to C0_wired - * on resume, clearing our wired entry. Unfortunately the ->resume() - * callback is called way way way too late (and ->suspend() too early) - * to have them destroy and recreate it. Instead just test if c0_wired - * is now lower than the index we retrieved before suspending and then - * recreate the entry if necessary. Of course this is totally bonkers - * and breaks as soon as someone else adds another wired entry somewhere - * else. Anyone have any ideas how to handle this better? - */ - if (unlikely(read_c0_wired() < ctx->wired_entry)) - alchemy_pci_wired_entry(ctx); - local_irq_save(flags); r = __raw_readl(ctx->regs + PCI_REG_STATCMD) & 0x0000ffff; r |= PCI_STATCMD_STATUS(0x2000); @@ -304,6 +299,62 @@ static int alchemy_pci_def_idsel(unsigned int devsel, int assert) return 1; /* success */ } +/* save PCI controller register contents. */ +static int alchemy_pci_suspend(void) +{ + struct alchemy_pci_context *ctx = __alchemy_pci_ctx; + if (!ctx) + return 0; + + ctx->pm[0] = __raw_readl(ctx->regs + PCI_REG_CMEM); + ctx->pm[1] = __raw_readl(ctx->regs + PCI_REG_CONFIG) & 0x0009ffff; + ctx->pm[2] = __raw_readl(ctx->regs + PCI_REG_B2BMASK_CCH); + ctx->pm[3] = __raw_readl(ctx->regs + PCI_REG_B2BBASE0_VID); + ctx->pm[4] = __raw_readl(ctx->regs + PCI_REG_B2BBASE1_SID); + ctx->pm[5] = __raw_readl(ctx->regs + PCI_REG_MWMASK_DEV); + ctx->pm[6] = __raw_readl(ctx->regs + PCI_REG_MWBASE_REV_CCL); + ctx->pm[7] = __raw_readl(ctx->regs + PCI_REG_ID); + ctx->pm[8] = __raw_readl(ctx->regs + PCI_REG_CLASSREV); + ctx->pm[9] = __raw_readl(ctx->regs + PCI_REG_PARAM); + ctx->pm[10] = __raw_readl(ctx->regs + PCI_REG_MBAR); + ctx->pm[11] = __raw_readl(ctx->regs + PCI_REG_TIMEOUT); + + return 0; +} + +static void alchemy_pci_resume(void) +{ + struct alchemy_pci_context *ctx = __alchemy_pci_ctx; + if (!ctx) + return; + + __raw_writel(ctx->pm[0], ctx->regs + PCI_REG_CMEM); + __raw_writel(ctx->pm[2], ctx->regs + PCI_REG_B2BMASK_CCH); + __raw_writel(ctx->pm[3], ctx->regs + PCI_REG_B2BBASE0_VID); + __raw_writel(ctx->pm[4], ctx->regs + PCI_REG_B2BBASE1_SID); + __raw_writel(ctx->pm[5], ctx->regs + PCI_REG_MWMASK_DEV); + __raw_writel(ctx->pm[6], ctx->regs + PCI_REG_MWBASE_REV_CCL); + __raw_writel(ctx->pm[7], ctx->regs + PCI_REG_ID); + __raw_writel(ctx->pm[8], ctx->regs + PCI_REG_CLASSREV); + __raw_writel(ctx->pm[9], ctx->regs + PCI_REG_PARAM); + __raw_writel(ctx->pm[10], ctx->regs + PCI_REG_MBAR); + __raw_writel(ctx->pm[11], ctx->regs + PCI_REG_TIMEOUT); + wmb(); + __raw_writel(ctx->pm[1], ctx->regs + PCI_REG_CONFIG); + wmb(); + + /* YAMON on all db1xxx boards wipes the TLB and writes zero to C0_wired + * on resume, making it necessary to recreate it as soon as possible. + */ + ctx->wired_entry = 8191; /* impossibly high value */ + alchemy_pci_wired_entry(ctx); /* install it */ +} + +static struct syscore_ops alchemy_pci_pmops = { + .suspend = alchemy_pci_suspend, + .resume = alchemy_pci_resume, +}; + static int __devinit alchemy_pci_probe(struct platform_device *pdev) { struct alchemy_pci_platdata *pd = pdev->dev.platform_data; @@ -396,7 +447,8 @@ static int __devinit alchemy_pci_probe(struct platform_device *pdev) ret = -ENOMEM; goto out4; } - ctx->wired_entry = 8192; /* impossibly high value */ + ctx->wired_entry = 8191; /* impossibly high value */ + alchemy_pci_wired_entry(ctx); /* install it */ set_io_port_base((unsigned long)ctx->alchemy_pci_ctrl.io_map_base); @@ -408,7 +460,9 @@ static int __devinit alchemy_pci_probe(struct platform_device *pdev) __raw_writel(val, ctx->regs + PCI_REG_CONFIG); wmb(); + __alchemy_pci_ctx = ctx; platform_set_drvdata(pdev, ctx); + register_syscore_ops(&alchemy_pci_pmops); register_pci_controller(&ctx->alchemy_pci_ctrl); return 0; @@ -425,68 +479,11 @@ out: return ret; } - -#ifdef CONFIG_PM -/* save PCI controller register contents. */ -static int alchemy_pci_suspend(struct device *dev) -{ - struct alchemy_pci_context *ctx = dev_get_drvdata(dev); - - ctx->pm[0] = __raw_readl(ctx->regs + PCI_REG_CMEM); - ctx->pm[1] = __raw_readl(ctx->regs + PCI_REG_CONFIG) & 0x0009ffff; - ctx->pm[2] = __raw_readl(ctx->regs + PCI_REG_B2BMASK_CCH); - ctx->pm[3] = __raw_readl(ctx->regs + PCI_REG_B2BBASE0_VID); - ctx->pm[4] = __raw_readl(ctx->regs + PCI_REG_B2BBASE1_SID); - ctx->pm[5] = __raw_readl(ctx->regs + PCI_REG_MWMASK_DEV); - ctx->pm[6] = __raw_readl(ctx->regs + PCI_REG_MWBASE_REV_CCL); - ctx->pm[7] = __raw_readl(ctx->regs + PCI_REG_ID); - ctx->pm[8] = __raw_readl(ctx->regs + PCI_REG_CLASSREV); - ctx->pm[9] = __raw_readl(ctx->regs + PCI_REG_PARAM); - ctx->pm[10] = __raw_readl(ctx->regs + PCI_REG_MBAR); - ctx->pm[11] = __raw_readl(ctx->regs + PCI_REG_TIMEOUT); - - return 0; -} - -static int alchemy_pci_resume(struct device *dev) -{ - struct alchemy_pci_context *ctx = dev_get_drvdata(dev); - - __raw_writel(ctx->pm[0], ctx->regs + PCI_REG_CMEM); - __raw_writel(ctx->pm[2], ctx->regs + PCI_REG_B2BMASK_CCH); - __raw_writel(ctx->pm[3], ctx->regs + PCI_REG_B2BBASE0_VID); - __raw_writel(ctx->pm[4], ctx->regs + PCI_REG_B2BBASE1_SID); - __raw_writel(ctx->pm[5], ctx->regs + PCI_REG_MWMASK_DEV); - __raw_writel(ctx->pm[6], ctx->regs + PCI_REG_MWBASE_REV_CCL); - __raw_writel(ctx->pm[7], ctx->regs + PCI_REG_ID); - __raw_writel(ctx->pm[8], ctx->regs + PCI_REG_CLASSREV); - __raw_writel(ctx->pm[9], ctx->regs + PCI_REG_PARAM); - __raw_writel(ctx->pm[10], ctx->regs + PCI_REG_MBAR); - __raw_writel(ctx->pm[11], ctx->regs + PCI_REG_TIMEOUT); - wmb(); - __raw_writel(ctx->pm[1], ctx->regs + PCI_REG_CONFIG); - wmb(); - - return 0; -} - -static const struct dev_pm_ops alchemy_pci_pmops = { - .suspend = alchemy_pci_suspend, - .resume = alchemy_pci_resume, -}; - -#define ALCHEMY_PCICTL_PM (&alchemy_pci_pmops) - -#else -#define ALCHEMY_PCICTL_PM NULL -#endif - static struct platform_driver alchemy_pcictl_driver = { .probe = alchemy_pci_probe, .driver = { .name = "alchemy-pci", .owner = THIS_MODULE, - .pm = ALCHEMY_PCICTL_PM, }, }; |