| Message ID | a49a36c4ca336dee909e16865d6fec0dd83b3f38.1718980864.git.lorenzo@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add Airoha EN7581 PCIE support | expand |
Il 21/06/24 16:48, Lorenzo Bianconi ha scritto: > Introduce mtk_pcie_soc data structure in order to define multiple > callbacks for each supported SoC. This is a preliminary patch to > introduce EN7581 pcie support. > > Tested-by: Zhengping Zhang <zhengping.zhang@airoha.com> > Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> > --- > drivers/pci/controller/pcie-mediatek-gen3.c | 24 ++++++++++++++++++--- > 1 file changed, 21 insertions(+), 3 deletions(-) > > diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c > index 975b3024fb08..4859bd875bc4 100644 > --- a/drivers/pci/controller/pcie-mediatek-gen3.c > +++ b/drivers/pci/controller/pcie-mediatek-gen3.c > @@ -100,6 +100,16 @@ > #define PCIE_ATR_TLP_TYPE_MEM PCIE_ATR_TLP_TYPE(0) > #define PCIE_ATR_TLP_TYPE_IO PCIE_ATR_TLP_TYPE(2) > > +struct mtk_gen3_pcie; > + > +/** > + * struct mtk_pcie_soc - differentiate between host generations mtk_gen3_pcie_pdata ? > + * @power_up: pcie power_up callback > + */ > +struct mtk_pcie_soc { > + int (*power_up)(struct mtk_gen3_pcie *pcie); > +}; > + > /** > * struct mtk_msi_set - MSI information for each set > * @base: IO mapped register base > @@ -131,6 +141,7 @@ struct mtk_msi_set { > * @msi_sets: MSI sets information > * @lock: lock protecting IRQ bit map > * @msi_irq_in_use: bit map for assigned MSI IRQ > + * @soc: pointer to SoC-dependent operations > */ > struct mtk_gen3_pcie { > struct device *dev; > @@ -151,6 +162,8 @@ struct mtk_gen3_pcie { > struct mtk_msi_set msi_sets[PCIE_MSI_SET_NUM]; > struct mutex lock; > DECLARE_BITMAP(msi_irq_in_use, PCIE_MSI_IRQS_NUM); > + > + const struct mtk_pcie_soc *soc; > }; > > /* LTSSM state in PCIE_LTSSM_STATUS_REG bit[28:24] */ > @@ -904,7 +917,7 @@ static int mtk_pcie_setup(struct mtk_gen3_pcie *pcie) > usleep_range(10, 20); > > /* Don't touch the hardware registers before power up */ > - err = mtk_pcie_power_up(pcie); > + err = pcie->soc->power_up(pcie); > if (err) > return err; > > @@ -939,6 +952,7 @@ static int mtk_pcie_probe(struct platform_device *pdev) > pcie = pci_host_bridge_priv(host); > > pcie->dev = dev; > + pcie->soc = of_device_get_match_data(dev); device_get_match_data() can also be used here :-) Cheers, Angelo
> Il 21/06/24 16:48, Lorenzo Bianconi ha scritto: > > Introduce mtk_pcie_soc data structure in order to define multiple > > callbacks for each supported SoC. This is a preliminary patch to > > introduce EN7581 pcie support. > > > > Tested-by: Zhengping Zhang <zhengping.zhang@airoha.com> > > Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> > > --- > > drivers/pci/controller/pcie-mediatek-gen3.c | 24 ++++++++++++++++++--- > > 1 file changed, 21 insertions(+), 3 deletions(-) > > > > diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c > > index 975b3024fb08..4859bd875bc4 100644 > > --- a/drivers/pci/controller/pcie-mediatek-gen3.c > > +++ b/drivers/pci/controller/pcie-mediatek-gen3.c > > @@ -100,6 +100,16 @@ > > #define PCIE_ATR_TLP_TYPE_MEM PCIE_ATR_TLP_TYPE(0) > > #define PCIE_ATR_TLP_TYPE_IO PCIE_ATR_TLP_TYPE(2) > > +struct mtk_gen3_pcie; > > + > > +/** > > + * struct mtk_pcie_soc - differentiate between host generations > > mtk_gen3_pcie_pdata ? ack, I will fix it in v2. > > > + * @power_up: pcie power_up callback > > + */ > > +struct mtk_pcie_soc { > > + int (*power_up)(struct mtk_gen3_pcie *pcie); > > +}; > > + > > /** > > * struct mtk_msi_set - MSI information for each set > > * @base: IO mapped register base > > @@ -131,6 +141,7 @@ struct mtk_msi_set { > > * @msi_sets: MSI sets information > > * @lock: lock protecting IRQ bit map > > * @msi_irq_in_use: bit map for assigned MSI IRQ > > + * @soc: pointer to SoC-dependent operations > > */ > > struct mtk_gen3_pcie { > > struct device *dev; > > @@ -151,6 +162,8 @@ struct mtk_gen3_pcie { > > struct mtk_msi_set msi_sets[PCIE_MSI_SET_NUM]; > > struct mutex lock; > > DECLARE_BITMAP(msi_irq_in_use, PCIE_MSI_IRQS_NUM); > > + > > + const struct mtk_pcie_soc *soc; > > }; > > /* LTSSM state in PCIE_LTSSM_STATUS_REG bit[28:24] */ > > @@ -904,7 +917,7 @@ static int mtk_pcie_setup(struct mtk_gen3_pcie *pcie) > > usleep_range(10, 20); > > /* Don't touch the hardware registers before power up */ > > - err = mtk_pcie_power_up(pcie); > > + err = pcie->soc->power_up(pcie); > > if (err) > > return err; > > @@ -939,6 +952,7 @@ static int mtk_pcie_probe(struct platform_device *pdev) > > pcie = pci_host_bridge_priv(host); > > pcie->dev = dev; > > + pcie->soc = of_device_get_match_data(dev); > > device_get_match_data() can also be used here :-) ack, I will fix it in v2. Regards, Lorenzo > > Cheers, > Angelo >
diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c index 975b3024fb08..4859bd875bc4 100644 --- a/drivers/pci/controller/pcie-mediatek-gen3.c +++ b/drivers/pci/controller/pcie-mediatek-gen3.c @@ -100,6 +100,16 @@ #define PCIE_ATR_TLP_TYPE_MEM PCIE_ATR_TLP_TYPE(0) #define PCIE_ATR_TLP_TYPE_IO PCIE_ATR_TLP_TYPE(2) +struct mtk_gen3_pcie; + +/** + * struct mtk_pcie_soc - differentiate between host generations + * @power_up: pcie power_up callback + */ +struct mtk_pcie_soc { + int (*power_up)(struct mtk_gen3_pcie *pcie); +}; + /** * struct mtk_msi_set - MSI information for each set * @base: IO mapped register base @@ -131,6 +141,7 @@ struct mtk_msi_set { * @msi_sets: MSI sets information * @lock: lock protecting IRQ bit map * @msi_irq_in_use: bit map for assigned MSI IRQ + * @soc: pointer to SoC-dependent operations */ struct mtk_gen3_pcie { struct device *dev; @@ -151,6 +162,8 @@ struct mtk_gen3_pcie { struct mtk_msi_set msi_sets[PCIE_MSI_SET_NUM]; struct mutex lock; DECLARE_BITMAP(msi_irq_in_use, PCIE_MSI_IRQS_NUM); + + const struct mtk_pcie_soc *soc; }; /* LTSSM state in PCIE_LTSSM_STATUS_REG bit[28:24] */ @@ -904,7 +917,7 @@ static int mtk_pcie_setup(struct mtk_gen3_pcie *pcie) usleep_range(10, 20); /* Don't touch the hardware registers before power up */ - err = mtk_pcie_power_up(pcie); + err = pcie->soc->power_up(pcie); if (err) return err; @@ -939,6 +952,7 @@ static int mtk_pcie_probe(struct platform_device *pdev) pcie = pci_host_bridge_priv(host); pcie->dev = dev; + pcie->soc = of_device_get_match_data(dev); platform_set_drvdata(pdev, pcie); err = mtk_pcie_setup(pcie); @@ -1054,7 +1068,7 @@ static int mtk_pcie_resume_noirq(struct device *dev) struct mtk_gen3_pcie *pcie = dev_get_drvdata(dev); int err; - err = mtk_pcie_power_up(pcie); + err = pcie->soc->power_up(pcie); if (err) return err; @@ -1074,8 +1088,12 @@ static const struct dev_pm_ops mtk_pcie_pm_ops = { mtk_pcie_resume_noirq) }; +static const struct mtk_pcie_soc mtk_pcie_soc_mt8192 = { + .power_up = mtk_pcie_power_up, +}; + static const struct of_device_id mtk_pcie_of_match[] = { - { .compatible = "mediatek,mt8192-pcie" }, + { .compatible = "mediatek,mt8192-pcie", .data = &mtk_pcie_soc_mt8192 }, {}, }; MODULE_DEVICE_TABLE(of, mtk_pcie_of_match);