s/PCI: dwc: pci-dra7xx: Enable x2 mode support/ PCI: dra7xx: Enable x2 mode support for dra74x and dra76x/
Looks OK to me otherwise, but Rob had a comment about the DT names, so I'll wait for that resolution. On Tue, Oct 10, 2017 at 03:46:06PM +0530, Kishon Vijay Abraham I wrote: > Perform syscon configurations to get x2 mode to working in dra74x > (and dra76x). > > Signed-off-by: Kishon Vijay Abraham I <[email protected]> > Signed-off-by: Sekhar Nori <[email protected]> > --- > drivers/pci/dwc/pci-dra7xx.c | 68 > ++++++++++++++++++++++++++++++++++++++++++-- > 1 file changed, 66 insertions(+), 2 deletions(-) > > diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c > index 78a87a8f1362..a43c904310f3 100644 > --- a/drivers/pci/dwc/pci-dra7xx.c > +++ b/drivers/pci/dwc/pci-dra7xx.c > @@ -21,6 +21,7 @@ > #include <linux/of_device.h> > #include <linux/of_gpio.h> > #include <linux/of_pci.h> > +#include <linux/of_platform.h> > #include <linux/pci.h> > #include <linux/phy/phy.h> > #include <linux/platform_device.h> > @@ -83,6 +84,9 @@ > #define MSI_REQ_GRANT BIT(0) > #define MSI_VECTOR_SHIFT 7 > > +#define PCIE_1LANE_2LANE_SELECTION BIT(13) > +#define PCIE_B1C0_MODE_SEL BIT(2) > + > struct dra7xx_pcie { > struct dw_pcie *pci; > void __iomem *base; /* DT ti_conf */ > @@ -95,6 +99,10 @@ struct dra7xx_pcie { > > struct dra7xx_pcie_of_data { > enum dw_pcie_device_mode mode; > + u32 b1co_mode_sel_mask; > +}; > + > +struct dra7xx_pcie_data { > }; > > #define to_dra7xx_pcie(x) dev_get_drvdata((x)->dev) > @@ -533,6 +541,16 @@ static const struct dra7xx_pcie_of_data > dra7xx_pcie_ep_of_data = { > .mode = DW_PCIE_EP_TYPE, > }; > > +static const struct dra7xx_pcie_of_data dra746_pcie_rc_of_data = { > + .b1co_mode_sel_mask = BIT(2), > + .mode = DW_PCIE_RC_TYPE, > +}; > + > +static const struct dra7xx_pcie_of_data dra746_pcie_ep_of_data = { > + .b1co_mode_sel_mask = BIT(2), > + .mode = DW_PCIE_EP_TYPE, > +}; > + > static const struct of_device_id of_dra7xx_pcie_match[] = { > { > .compatible = "ti,dra7-pcie", > @@ -544,11 +562,11 @@ static const struct of_device_id of_dra7xx_pcie_match[] > = { > }, > { > .compatible = "ti,dra746-pcie-rc", > - .data = &dra7xx_pcie_rc_of_data, > + .data = &dra746_pcie_rc_of_data, > }, > { > .compatible = "ti,dra746-pcie-ep", > - .data = &dra7xx_pcie_ep_of_data, > + .data = &dra746_pcie_ep_of_data, > }, > { > .compatible = "ti,dra726-pcie-rc", > @@ -603,6 +621,44 @@ static int dra7xx_pcie_ep_unaligned_memaccess(struct > device *dev) > return ret; > } > > +static int dra7xx_pcie_configure_two_lane(struct device *dev, > + u32 b1co_mode_sel_mask) > +{ > + struct device_node *np = dev->of_node; > + struct regmap *pcie_syscon; > + unsigned int pcie_reg; > + > + pcie_syscon = syscon_regmap_lookup_by_phandle(np, "syscon-lane-conf"); > + if (IS_ERR(pcie_syscon)) { > + dev_err(dev, "unable to get syscon-lane-conf\n"); > + return -EINVAL; > + } > + > + if (of_property_read_u32_index(np, "syscon-lane-conf", 1, &pcie_reg)) { > + dev_err(dev, "couldn't get lane configuration reg offset\n"); > + return -EINVAL; > + } > + > + regmap_update_bits(pcie_syscon, pcie_reg, PCIE_1LANE_2LANE_SELECTION, > + PCIE_1LANE_2LANE_SELECTION); > + > + pcie_syscon = syscon_regmap_lookup_by_phandle(np, "syscon-lane-sel"); > + if (IS_ERR(pcie_syscon)) { > + dev_err(dev, "unable to get syscon-lane-sel\n"); > + return -EINVAL; > + } > + > + if (of_property_read_u32_index(np, "syscon-lane-sel", 1, &pcie_reg)) { > + dev_err(dev, "couldn't get lane selection reg offset\n"); > + return -EINVAL; > + } > + > + regmap_update_bits(pcie_syscon, pcie_reg, b1co_mode_sel_mask, > + PCIE_B1C0_MODE_SEL); > + > + return 0; > +} > + > static int __init dra7xx_pcie_probe(struct platform_device *pdev) > { > u32 reg; > @@ -624,6 +680,7 @@ static int __init dra7xx_pcie_probe(struct > platform_device *pdev) > const struct of_device_id *match; > const struct dra7xx_pcie_of_data *data; > enum dw_pcie_device_mode mode; > + u32 b1co_mode_sel_mask; > > match = of_match_device(of_match_ptr(of_dra7xx_pcie_match), dev); > if (!match) > @@ -631,6 +688,7 @@ static int __init dra7xx_pcie_probe(struct > platform_device *pdev) > > data = (struct dra7xx_pcie_of_data *)match->data; > mode = (enum dw_pcie_device_mode)data->mode; > + b1co_mode_sel_mask = data->b1co_mode_sel_mask; > > dra7xx = devm_kzalloc(dev, sizeof(*dra7xx), GFP_KERNEL); > if (!dra7xx) > @@ -689,6 +747,12 @@ static int __init dra7xx_pcie_probe(struct > platform_device *pdev) > dra7xx->pci = pci; > dra7xx->phy_count = phy_count; > > + if (phy_count == 2) { > + ret = dra7xx_pcie_configure_two_lane(dev, b1co_mode_sel_mask); > + if (ret < 0) > + goto err_link; > + } > + > ret = dra7xx_pcie_enable_phy(dra7xx); > if (ret) { > dev_err(dev, "failed to enable phy\n"); > -- > 2.11.0 >
