diff options
Diffstat (limited to 'drivers/pci/controller/pcie-mediatek-gen3.c')
| -rw-r--r-- | drivers/pci/controller/pcie-mediatek-gen3.c | 62 |
1 files changed, 52 insertions, 10 deletions
diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c index 5d9fd36b02d1..11cdb9b6f109 100644 --- a/drivers/pci/controller/pcie-mediatek-gen3.c +++ b/drivers/pci/controller/pcie-mediatek-gen3.c @@ -153,6 +153,37 @@ struct mtk_gen3_pcie { DECLARE_BITMAP(msi_irq_in_use, PCIE_MSI_IRQS_NUM); }; +/* LTSSM state in PCIE_LTSSM_STATUS_REG bit[28:24] */ +static const char *const ltssm_str[] = { + "detect.quiet", /* 0x00 */ + "detect.active", /* 0x01 */ + "polling.active", /* 0x02 */ + "polling.compliance", /* 0x03 */ + "polling.configuration", /* 0x04 */ + "config.linkwidthstart", /* 0x05 */ + "config.linkwidthaccept", /* 0x06 */ + "config.lanenumwait", /* 0x07 */ + "config.lanenumaccept", /* 0x08 */ + "config.complete", /* 0x09 */ + "config.idle", /* 0x0A */ + "recovery.receiverlock", /* 0x0B */ + "recovery.equalization", /* 0x0C */ + "recovery.speed", /* 0x0D */ + "recovery.receiverconfig", /* 0x0E */ + "recovery.idle", /* 0x0F */ + "L0", /* 0x10 */ + "L0s", /* 0x11 */ + "L1.entry", /* 0x12 */ + "L1.idle", /* 0x13 */ + "L2.idle", /* 0x14 */ + "L2.transmitwake", /* 0x15 */ + "disable", /* 0x16 */ + "loopback.entry", /* 0x17 */ + "loopback.active", /* 0x18 */ + "loopback.exit", /* 0x19 */ + "hotreset", /* 0x1A */ +}; + /** * mtk_pcie_config_tlp_header() - Configure a configuration TLP header * @bus: PCI bus to query @@ -327,8 +358,16 @@ static int mtk_pcie_startup_port(struct mtk_gen3_pcie *pcie) !!(val & PCIE_PORT_LINKUP), 20, PCI_PM_D3COLD_WAIT * USEC_PER_MSEC); if (err) { + const char *ltssm_state; + int ltssm_index; + val = readl_relaxed(pcie->base + PCIE_LTSSM_STATUS_REG); - dev_err(pcie->dev, "PCIe link down, ltssm reg val: %#x\n", val); + ltssm_index = PCIE_LTSSM_STATE(val); + ltssm_state = ltssm_index >= ARRAY_SIZE(ltssm_str) ? + "Unknown state" : ltssm_str[ltssm_index]; + dev_err(pcie->dev, + "PCIe link down, current LTSSM state: %s (%#x)\n", + ltssm_state, val); return err; } @@ -600,7 +639,8 @@ static int mtk_pcie_init_irq_domains(struct mtk_gen3_pcie *pcie) &intx_domain_ops, pcie); if (!pcie->intx_domain) { dev_err(dev, "failed to create INTx IRQ domain\n"); - return -ENODEV; + ret = -ENODEV; + goto out_put_node; } /* Setup MSI */ @@ -623,13 +663,15 @@ static int mtk_pcie_init_irq_domains(struct mtk_gen3_pcie *pcie) goto err_msi_domain; } + of_node_put(intc_node); return 0; err_msi_domain: irq_domain_remove(pcie->msi_bottom_domain); err_msi_bottom_domain: irq_domain_remove(pcie->intx_domain); - +out_put_node: + of_node_put(intc_node); return ret; } @@ -917,7 +959,7 @@ static int mtk_pcie_remove(struct platform_device *pdev) return 0; } -static void __maybe_unused mtk_pcie_irq_save(struct mtk_gen3_pcie *pcie) +static void mtk_pcie_irq_save(struct mtk_gen3_pcie *pcie) { int i; @@ -935,7 +977,7 @@ static void __maybe_unused mtk_pcie_irq_save(struct mtk_gen3_pcie *pcie) raw_spin_unlock(&pcie->irq_lock); } -static void __maybe_unused mtk_pcie_irq_restore(struct mtk_gen3_pcie *pcie) +static void mtk_pcie_irq_restore(struct mtk_gen3_pcie *pcie) { int i; @@ -953,7 +995,7 @@ static void __maybe_unused mtk_pcie_irq_restore(struct mtk_gen3_pcie *pcie) raw_spin_unlock(&pcie->irq_lock); } -static int __maybe_unused mtk_pcie_turn_off_link(struct mtk_gen3_pcie *pcie) +static int mtk_pcie_turn_off_link(struct mtk_gen3_pcie *pcie) { u32 val; @@ -968,7 +1010,7 @@ static int __maybe_unused mtk_pcie_turn_off_link(struct mtk_gen3_pcie *pcie) 50 * USEC_PER_MSEC); } -static int __maybe_unused mtk_pcie_suspend_noirq(struct device *dev) +static int mtk_pcie_suspend_noirq(struct device *dev) { struct mtk_gen3_pcie *pcie = dev_get_drvdata(dev); int err; @@ -994,7 +1036,7 @@ static int __maybe_unused mtk_pcie_suspend_noirq(struct device *dev) return 0; } -static int __maybe_unused mtk_pcie_resume_noirq(struct device *dev) +static int mtk_pcie_resume_noirq(struct device *dev) { struct mtk_gen3_pcie *pcie = dev_get_drvdata(dev); int err; @@ -1015,8 +1057,8 @@ static int __maybe_unused mtk_pcie_resume_noirq(struct device *dev) } static const struct dev_pm_ops mtk_pcie_pm_ops = { - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_pcie_suspend_noirq, - mtk_pcie_resume_noirq) + NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_pcie_suspend_noirq, + mtk_pcie_resume_noirq) }; static const struct of_device_id mtk_pcie_of_match[] = { |