| Message ID | 1500448979-93067-4-git-send-email-shawn.lin@rock-chips.com |
|---|---|
| State | Superseded |
| Headers | show |
On Wednesday 19 July 2017 12:52 PM, Shawn Lin wrote: > This patch reconstructs the whole driver to support per-lane > PHYs. Note that we could also support the legacy PHY if you > don't provide argument to our of_xlate. > > Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> > Reviewed-by: Brian Norris <briannorris@chromium.org> > Tested-by: Jeffy Chen <jeffy.chen@rock-chips.com> This design looks good! I'll queue this once I start queuing 4.14. Thanks Kishon
Hi Kishon, On 2017/7/19 15:50, Kishon Vijay Abraham I wrote: > > > On Wednesday 19 July 2017 12:52 PM, Shawn Lin wrote: >> This patch reconstructs the whole driver to support per-lane >> PHYs. Note that we could also support the legacy PHY if you >> don't provide argument to our of_xlate. >> >> Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> >> Reviewed-by: Brian Norris <briannorris@chromium.org> >> Tested-by: Jeffy Chen <jeffy.chen@rock-chips.com> > > This design looks good! I'll queue this once I start queuing 4.14. > Great! Thanks. :) > Thanks > Kishon > > _______________________________________________ > Linux-rockchip mailing list > Linux-rockchip@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-rockchip > > >
Hi Shawn, On Wednesday 19 July 2017 12:52 PM, Shawn Lin wrote: > This patch reconstructs the whole driver to support per-lane > PHYs. Note that we could also support the legacy PHY if you > don't provide argument to our of_xlate. one comment below which I failed to notice before.. > > Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> > Reviewed-by: Brian Norris <briannorris@chromium.org> > Tested-by: Jeffy Chen <jeffy.chen@rock-chips.com> > --- > > Changes in v4: None > Changes in v3: > - remove unnecessary forward declaration > - keep mutex inside struct rockchip_pcie_phy > - fix wrong check of args number > - move de-idle lanes after deasserting the reset > > Changes in v2: > - deprecate legacy PHY model > - improve rockchip_pcie_phy_of_xlate > - fix wrong calculation of pwr_cnt and add new init_cnt > - add internal locking > - introduce per-lane data to simply the code > > drivers/phy/rockchip/phy-rockchip-pcie.c | 124 +++++++++++++++++++++++++++---- > 1 file changed, 110 insertions(+), 14 deletions(-) > > diff --git a/drivers/phy/rockchip/phy-rockchip-pcie.c b/drivers/phy/rockchip/phy-rockchip-pcie.c > index 6904633..b5005a5 100644 > --- a/drivers/phy/rockchip/phy-rockchip-pcie.c > +++ b/drivers/phy/rockchip/phy-rockchip-pcie.c > @@ -73,10 +73,39 @@ struct rockchip_pcie_data { > struct rockchip_pcie_phy { > struct rockchip_pcie_data *phy_data; > struct regmap *reg_base; > + struct phy_pcie_instance { > + struct phy *phy; > + u32 index; > + } phys[PHY_MAX_LANE_NUM]; > + struct mutex pcie_mutex; > struct reset_control *phy_rst; > struct clk *clk_pciephy_ref; > + int pwr_cnt; > + int init_cnt; > }; > > +static inline > +struct rockchip_pcie_phy *to_pcie_phy(struct phy_pcie_instance *inst) > +{ > + return container_of(inst, struct rockchip_pcie_phy, > + phys[inst->index]); > +} > + > +static struct phy *rockchip_pcie_phy_of_xlate(struct device *dev, > + struct of_phandle_args *args) > +{ > + struct rockchip_pcie_phy *rk_phy = dev_get_drvdata(dev); > + > + if (args->args_count == 0) > + return rk_phy->phys[0].phy; > + > + if (WARN_ON(args->args[0] >= PHY_MAX_LANE_NUM)) > + return ERR_PTR(-ENODEV); > + > + return rk_phy->phys[args->args[0]].phy; > +} > + > + > static inline void phy_wr_cfg(struct rockchip_pcie_phy *rk_phy, > u32 addr, u32 data) > { > @@ -116,29 +145,59 @@ static inline u32 phy_rd_cfg(struct rockchip_pcie_phy *rk_phy, > > static int rockchip_pcie_phy_power_off(struct phy *phy) > { > - struct rockchip_pcie_phy *rk_phy = phy_get_drvdata(phy); > + struct phy_pcie_instance *inst = phy_get_drvdata(phy); > + struct rockchip_pcie_phy *rk_phy = to_pcie_phy(inst); > int err = 0; > > + mutex_lock(&rk_phy->pcie_mutex); > + > + regmap_write(rk_phy->reg_base, > + rk_phy->phy_data->pcie_laneoff, > + HIWORD_UPDATE(PHY_LANE_IDLE_OFF, > + PHY_LANE_IDLE_MASK, > + PHY_LANE_IDLE_A_SHIFT + inst->index)); > + > + if (--rk_phy->pwr_cnt) > + goto err_out; > + > err = reset_control_assert(rk_phy->phy_rst); > if (err) { > dev_err(&phy->dev, "assert phy_rst err %d\n", err); > - return err; > + goto err_restore; > } > > +err_out: > + mutex_unlock(&rk_phy->pcie_mutex); > return 0; > + > +err_restore: > + ++rk_phy->pwr_cnt; > + regmap_write(rk_phy->reg_base, > + rk_phy->phy_data->pcie_laneoff, > + HIWORD_UPDATE(!PHY_LANE_IDLE_OFF, > + PHY_LANE_IDLE_MASK, > + PHY_LANE_IDLE_A_SHIFT + inst->index)); > + mutex_unlock(&rk_phy->pcie_mutex); > + return err; > } > > static int rockchip_pcie_phy_power_on(struct phy *phy) > { > - struct rockchip_pcie_phy *rk_phy = phy_get_drvdata(phy); > + struct phy_pcie_instance *inst = phy_get_drvdata(phy); > + struct rockchip_pcie_phy *rk_phy = to_pcie_phy(inst); > int err = 0; > u32 status; > unsigned long timeout; > > + mutex_lock(&rk_phy->pcie_mutex); > + > + if (rk_phy->pwr_cnt++) > + goto err_out; > + > err = reset_control_deassert(rk_phy->phy_rst); > if (err) { > dev_err(&phy->dev, "deassert phy_rst err %d\n", err); > - return err; > + goto err_pwr_cnt; > } > > regmap_write(rk_phy->reg_base, rk_phy->phy_data->pcie_conf, > @@ -146,6 +205,12 @@ static int rockchip_pcie_phy_power_on(struct phy *phy) > PHY_CFG_ADDR_MASK, > PHY_CFG_ADDR_SHIFT)); > > + regmap_write(rk_phy->reg_base, > + rk_phy->phy_data->pcie_laneoff, > + HIWORD_UPDATE(!PHY_LANE_IDLE_OFF, > + PHY_LANE_IDLE_MASK, > + PHY_LANE_IDLE_A_SHIFT + inst->index)); > + > /* > * No documented timeout value for phy operation below, > * so we make it large enough here. And we use loop-break > @@ -214,18 +279,29 @@ static int rockchip_pcie_phy_power_on(struct phy *phy) > goto err_pll_lock; > } > > +err_out: > + mutex_unlock(&rk_phy->pcie_mutex); > return 0; > > err_pll_lock: > reset_control_assert(rk_phy->phy_rst); > +err_pwr_cnt: > + --rk_phy->pwr_cnt; > + mutex_unlock(&rk_phy->pcie_mutex); > return err; > } > > static int rockchip_pcie_phy_init(struct phy *phy) > { > - struct rockchip_pcie_phy *rk_phy = phy_get_drvdata(phy); > + struct phy_pcie_instance *inst = phy_get_drvdata(phy); > + struct rockchip_pcie_phy *rk_phy = to_pcie_phy(inst); > int err = 0; > > + mutex_lock(&rk_phy->pcie_mutex); > + > + if (rk_phy->init_cnt++) > + goto err_out; > + > err = clk_prepare_enable(rk_phy->clk_pciephy_ref); > if (err) { > dev_err(&phy->dev, "Fail to enable pcie ref clock.\n"); > @@ -238,20 +314,33 @@ static int rockchip_pcie_phy_init(struct phy *phy) > goto err_reset; > } > > - return err; > +err_out: > + mutex_unlock(&rk_phy->pcie_mutex); > + return 0; > > err_reset: > + > clk_disable_unprepare(rk_phy->clk_pciephy_ref); > err_refclk: > + --rk_phy->init_cnt; > + mutex_unlock(&rk_phy->pcie_mutex); > return err; > } > > static int rockchip_pcie_phy_exit(struct phy *phy) > { > - struct rockchip_pcie_phy *rk_phy = phy_get_drvdata(phy); > + struct phy_pcie_instance *inst = phy_get_drvdata(phy); > + struct rockchip_pcie_phy *rk_phy = to_pcie_phy(inst); > + > + mutex_lock(&rk_phy->pcie_mutex); > + > + if (--rk_phy->init_cnt) > + goto err_init_cnt; > > clk_disable_unprepare(rk_phy->clk_pciephy_ref); > > +err_init_cnt: > + mutex_unlock(&rk_phy->pcie_mutex); > return 0; > } > > @@ -283,10 +372,10 @@ static int rockchip_pcie_phy_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > struct rockchip_pcie_phy *rk_phy; > - struct phy *generic_phy; > struct phy_provider *phy_provider; > struct regmap *grf; > const struct of_device_id *of_id; > + int i; > > grf = syscon_node_to_regmap(dev->parent->of_node); > if (IS_ERR(grf)) { > @@ -305,6 +394,8 @@ static int rockchip_pcie_phy_probe(struct platform_device *pdev) > rk_phy->phy_data = (struct rockchip_pcie_data *)of_id->data; > rk_phy->reg_base = grf; > > + mutex_init(&rk_phy->pcie_mutex); > + > rk_phy->phy_rst = devm_reset_control_get(dev, "phy"); > if (IS_ERR(rk_phy->phy_rst)) { > if (PTR_ERR(rk_phy->phy_rst) != -EPROBE_DEFER) > @@ -319,14 +410,19 @@ static int rockchip_pcie_phy_probe(struct platform_device *pdev) > return PTR_ERR(rk_phy->clk_pciephy_ref); > } > > - generic_phy = devm_phy_create(dev, dev->of_node, &ops); > - if (IS_ERR(generic_phy)) { > - dev_err(dev, "failed to create PHY\n"); > - return PTR_ERR(generic_phy); > + for (i = 0; i < PHY_MAX_LANE_NUM; i++) { > + rk_phy->phys[i].phy = devm_phy_create(dev, dev->of_node, &ops); > + if (IS_ERR(rk_phy->phys[i].phy)) { > + dev_err(dev, "failed to create PHY%d\n", i); > + return PTR_ERR(rk_phy->phys[i].phy); > + } > + rk_phy->phys[i].index = i; For legacy dt, it would create more number of phys than required right? it would be nice to fix that. Thanks Kishon
Hi Kishon, On 2017/7/19 16:08, Kishon Vijay Abraham I wrote: > Hi Shawn, > > On Wednesday 19 July 2017 12:52 PM, Shawn Lin wrote: >> This patch reconstructs the whole driver to support per-lane >> PHYs. Note that we could also support the legacy PHY if you >> don't provide argument to our of_xlate. > > one comment below which I failed to notice before.. I will fix it and respin v5. BTW, are you fine with all these patches merged via Bjorn's PCI tree in order to narrow down the timing gap for testing linux-next? If yes, could you kindly ack patch 3 of V5 if it looks good to you? :) Thanks. >> >> Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> >> Reviewed-by: Brian Norris <briannorris@chromium.org> >> Tested-by: Jeffy Chen <jeffy.chen@rock-chips.com> >> --- >> >> Changes in v4: None >> Changes in v3: >> - remove unnecessary forward declaration >> - keep mutex inside struct rockchip_pcie_phy >> - fix wrong check of args number >> - move de-idle lanes after deasserting the reset >> >> Changes in v2: >> - deprecate legacy PHY model >> - improve rockchip_pcie_phy_of_xlate >> - fix wrong calculation of pwr_cnt and add new init_cnt >> - add internal locking >> - introduce per-lane data to simply the code >> >> drivers/phy/rockchip/phy-rockchip-pcie.c | 124 +++++++++++++++++++++++++++---- >> 1 file changed, 110 insertions(+), 14 deletions(-) >> >> diff --git a/drivers/phy/rockchip/phy-rockchip-pcie.c b/drivers/phy/rockchip/phy-rockchip-pcie.c >> index 6904633..b5005a5 100644 >> --- a/drivers/phy/rockchip/phy-rockchip-pcie.c >> +++ b/drivers/phy/rockchip/phy-rockchip-pcie.c >> @@ -73,10 +73,39 @@ struct rockchip_pcie_data { >> struct rockchip_pcie_phy { >> struct rockchip_pcie_data *phy_data; >> struct regmap *reg_base; >> + struct phy_pcie_instance { >> + struct phy *phy; >> + u32 index; >> + } phys[PHY_MAX_LANE_NUM]; >> + struct mutex pcie_mutex; >> struct reset_control *phy_rst; >> struct clk *clk_pciephy_ref; >> + int pwr_cnt; >> + int init_cnt; >> }; >> >> +static inline >> +struct rockchip_pcie_phy *to_pcie_phy(struct phy_pcie_instance *inst) >> +{ >> + return container_of(inst, struct rockchip_pcie_phy, >> + phys[inst->index]); >> +} >> + >> +static struct phy *rockchip_pcie_phy_of_xlate(struct device *dev, >> + struct of_phandle_args *args) >> +{ >> + struct rockchip_pcie_phy *rk_phy = dev_get_drvdata(dev); >> + >> + if (args->args_count == 0) >> + return rk_phy->phys[0].phy; >> + >> + if (WARN_ON(args->args[0] >= PHY_MAX_LANE_NUM)) >> + return ERR_PTR(-ENODEV); >> + >> + return rk_phy->phys[args->args[0]].phy; >> +} >> + >> + >> static inline void phy_wr_cfg(struct rockchip_pcie_phy *rk_phy, >> u32 addr, u32 data) >> { >> @@ -116,29 +145,59 @@ static inline u32 phy_rd_cfg(struct rockchip_pcie_phy *rk_phy, >> >> static int rockchip_pcie_phy_power_off(struct phy *phy) >> { >> - struct rockchip_pcie_phy *rk_phy = phy_get_drvdata(phy); >> + struct phy_pcie_instance *inst = phy_get_drvdata(phy); >> + struct rockchip_pcie_phy *rk_phy = to_pcie_phy(inst); >> int err = 0; >> >> + mutex_lock(&rk_phy->pcie_mutex); >> + >> + regmap_write(rk_phy->reg_base, >> + rk_phy->phy_data->pcie_laneoff, >> + HIWORD_UPDATE(PHY_LANE_IDLE_OFF, >> + PHY_LANE_IDLE_MASK, >> + PHY_LANE_IDLE_A_SHIFT + inst->index)); >> + >> + if (--rk_phy->pwr_cnt) >> + goto err_out; >> + >> err = reset_control_assert(rk_phy->phy_rst); >> if (err) { >> dev_err(&phy->dev, "assert phy_rst err %d\n", err); >> - return err; >> + goto err_restore; >> } >> >> +err_out: >> + mutex_unlock(&rk_phy->pcie_mutex); >> return 0; >> + >> +err_restore: >> + ++rk_phy->pwr_cnt; >> + regmap_write(rk_phy->reg_base, >> + rk_phy->phy_data->pcie_laneoff, >> + HIWORD_UPDATE(!PHY_LANE_IDLE_OFF, >> + PHY_LANE_IDLE_MASK, >> + PHY_LANE_IDLE_A_SHIFT + inst->index)); >> + mutex_unlock(&rk_phy->pcie_mutex); >> + return err; >> } >> >> static int rockchip_pcie_phy_power_on(struct phy *phy) >> { >> - struct rockchip_pcie_phy *rk_phy = phy_get_drvdata(phy); >> + struct phy_pcie_instance *inst = phy_get_drvdata(phy); >> + struct rockchip_pcie_phy *rk_phy = to_pcie_phy(inst); >> int err = 0; >> u32 status; >> unsigned long timeout; >> >> + mutex_lock(&rk_phy->pcie_mutex); >> + >> + if (rk_phy->pwr_cnt++) >> + goto err_out; >> + >> err = reset_control_deassert(rk_phy->phy_rst); >> if (err) { >> dev_err(&phy->dev, "deassert phy_rst err %d\n", err); >> - return err; >> + goto err_pwr_cnt; >> } >> >> regmap_write(rk_phy->reg_base, rk_phy->phy_data->pcie_conf, >> @@ -146,6 +205,12 @@ static int rockchip_pcie_phy_power_on(struct phy *phy) >> PHY_CFG_ADDR_MASK, >> PHY_CFG_ADDR_SHIFT)); >> >> + regmap_write(rk_phy->reg_base, >> + rk_phy->phy_data->pcie_laneoff, >> + HIWORD_UPDATE(!PHY_LANE_IDLE_OFF, >> + PHY_LANE_IDLE_MASK, >> + PHY_LANE_IDLE_A_SHIFT + inst->index)); >> + >> /* >> * No documented timeout value for phy operation below, >> * so we make it large enough here. And we use loop-break >> @@ -214,18 +279,29 @@ static int rockchip_pcie_phy_power_on(struct phy *phy) >> goto err_pll_lock; >> } >> >> +err_out: >> + mutex_unlock(&rk_phy->pcie_mutex); >> return 0; >> >> err_pll_lock: >> reset_control_assert(rk_phy->phy_rst); >> +err_pwr_cnt: >> + --rk_phy->pwr_cnt; >> + mutex_unlock(&rk_phy->pcie_mutex); >> return err; >> } >> >> static int rockchip_pcie_phy_init(struct phy *phy) >> { >> - struct rockchip_pcie_phy *rk_phy = phy_get_drvdata(phy); >> + struct phy_pcie_instance *inst = phy_get_drvdata(phy); >> + struct rockchip_pcie_phy *rk_phy = to_pcie_phy(inst); >> int err = 0; >> >> + mutex_lock(&rk_phy->pcie_mutex); >> + >> + if (rk_phy->init_cnt++) >> + goto err_out; >> + >> err = clk_prepare_enable(rk_phy->clk_pciephy_ref); >> if (err) { >> dev_err(&phy->dev, "Fail to enable pcie ref clock.\n"); >> @@ -238,20 +314,33 @@ static int rockchip_pcie_phy_init(struct phy *phy) >> goto err_reset; >> } >> >> - return err; >> +err_out: >> + mutex_unlock(&rk_phy->pcie_mutex); >> + return 0; >> >> err_reset: >> + >> clk_disable_unprepare(rk_phy->clk_pciephy_ref); >> err_refclk: >> + --rk_phy->init_cnt; >> + mutex_unlock(&rk_phy->pcie_mutex); >> return err; >> } >> >> static int rockchip_pcie_phy_exit(struct phy *phy) >> { >> - struct rockchip_pcie_phy *rk_phy = phy_get_drvdata(phy); >> + struct phy_pcie_instance *inst = phy_get_drvdata(phy); >> + struct rockchip_pcie_phy *rk_phy = to_pcie_phy(inst); >> + >> + mutex_lock(&rk_phy->pcie_mutex); >> + >> + if (--rk_phy->init_cnt) >> + goto err_init_cnt; >> >> clk_disable_unprepare(rk_phy->clk_pciephy_ref); >> >> +err_init_cnt: >> + mutex_unlock(&rk_phy->pcie_mutex); >> return 0; >> } >> >> @@ -283,10 +372,10 @@ static int rockchip_pcie_phy_probe(struct platform_device *pdev) >> { >> struct device *dev = &pdev->dev; >> struct rockchip_pcie_phy *rk_phy; >> - struct phy *generic_phy; >> struct phy_provider *phy_provider; >> struct regmap *grf; >> const struct of_device_id *of_id; >> + int i; >> >> grf = syscon_node_to_regmap(dev->parent->of_node); >> if (IS_ERR(grf)) { >> @@ -305,6 +394,8 @@ static int rockchip_pcie_phy_probe(struct platform_device *pdev) >> rk_phy->phy_data = (struct rockchip_pcie_data *)of_id->data; >> rk_phy->reg_base = grf; >> >> + mutex_init(&rk_phy->pcie_mutex); >> + >> rk_phy->phy_rst = devm_reset_control_get(dev, "phy"); >> if (IS_ERR(rk_phy->phy_rst)) { >> if (PTR_ERR(rk_phy->phy_rst) != -EPROBE_DEFER) >> @@ -319,14 +410,19 @@ static int rockchip_pcie_phy_probe(struct platform_device *pdev) >> return PTR_ERR(rk_phy->clk_pciephy_ref); >> } >> >> - generic_phy = devm_phy_create(dev, dev->of_node, &ops); >> - if (IS_ERR(generic_phy)) { >> - dev_err(dev, "failed to create PHY\n"); >> - return PTR_ERR(generic_phy); >> + for (i = 0; i < PHY_MAX_LANE_NUM; i++) { >> + rk_phy->phys[i].phy = devm_phy_create(dev, dev->of_node, &ops); >> + if (IS_ERR(rk_phy->phys[i].phy)) { >> + dev_err(dev, "failed to create PHY%d\n", i); >> + return PTR_ERR(rk_phy->phys[i].phy); >> + } >> + rk_phy->phys[i].index = i; > > > For legacy dt, it would create more number of phys than required right? it > would be nice to fix that. > > Thanks > Kishon > > >
On Wednesday 19 July 2017 03:06 PM, Shawn Lin wrote: > Hi Kishon, > > On 2017/7/19 16:08, Kishon Vijay Abraham I wrote: >> Hi Shawn, >> >> On Wednesday 19 July 2017 12:52 PM, Shawn Lin wrote: >>> This patch reconstructs the whole driver to support per-lane >>> PHYs. Note that we could also support the legacy PHY if you >>> don't provide argument to our of_xlate. >> >> one comment below which I failed to notice before.. > > I will fix it and respin v5. > > BTW, are you fine with all these patches merged via Bjorn's > PCI tree in order to narrow down the timing gap for testing > linux-next? If yes, could you kindly ack patch 3 of V5 > if it looks good to you? :) sure! Thanks Kishon
diff --git a/drivers/phy/rockchip/phy-rockchip-pcie.c b/drivers/phy/rockchip/phy-rockchip-pcie.c index 6904633..b5005a5 100644 --- a/drivers/phy/rockchip/phy-rockchip-pcie.c +++ b/drivers/phy/rockchip/phy-rockchip-pcie.c @@ -73,10 +73,39 @@ struct rockchip_pcie_data { struct rockchip_pcie_phy { struct rockchip_pcie_data *phy_data; struct regmap *reg_base; + struct phy_pcie_instance { + struct phy *phy; + u32 index; + } phys[PHY_MAX_LANE_NUM]; + struct mutex pcie_mutex; struct reset_control *phy_rst; struct clk *clk_pciephy_ref; + int pwr_cnt; + int init_cnt; }; +static inline +struct rockchip_pcie_phy *to_pcie_phy(struct phy_pcie_instance *inst) +{ + return container_of(inst, struct rockchip_pcie_phy, + phys[inst->index]); +} + +static struct phy *rockchip_pcie_phy_of_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct rockchip_pcie_phy *rk_phy = dev_get_drvdata(dev); + + if (args->args_count == 0) + return rk_phy->phys[0].phy; + + if (WARN_ON(args->args[0] >= PHY_MAX_LANE_NUM)) + return ERR_PTR(-ENODEV); + + return rk_phy->phys[args->args[0]].phy; +} + + static inline void phy_wr_cfg(struct rockchip_pcie_phy *rk_phy, u32 addr, u32 data) { @@ -116,29 +145,59 @@ static inline u32 phy_rd_cfg(struct rockchip_pcie_phy *rk_phy, static int rockchip_pcie_phy_power_off(struct phy *phy) { - struct rockchip_pcie_phy *rk_phy = phy_get_drvdata(phy); + struct phy_pcie_instance *inst = phy_get_drvdata(phy); + struct rockchip_pcie_phy *rk_phy = to_pcie_phy(inst); int err = 0; + mutex_lock(&rk_phy->pcie_mutex); + + regmap_write(rk_phy->reg_base, + rk_phy->phy_data->pcie_laneoff, + HIWORD_UPDATE(PHY_LANE_IDLE_OFF, + PHY_LANE_IDLE_MASK, + PHY_LANE_IDLE_A_SHIFT + inst->index)); + + if (--rk_phy->pwr_cnt) + goto err_out; + err = reset_control_assert(rk_phy->phy_rst); if (err) { dev_err(&phy->dev, "assert phy_rst err %d\n", err); - return err; + goto err_restore; } +err_out: + mutex_unlock(&rk_phy->pcie_mutex); return 0; + +err_restore: + ++rk_phy->pwr_cnt; + regmap_write(rk_phy->reg_base, + rk_phy->phy_data->pcie_laneoff, + HIWORD_UPDATE(!PHY_LANE_IDLE_OFF, + PHY_LANE_IDLE_MASK, + PHY_LANE_IDLE_A_SHIFT + inst->index)); + mutex_unlock(&rk_phy->pcie_mutex); + return err; } static int rockchip_pcie_phy_power_on(struct phy *phy) { - struct rockchip_pcie_phy *rk_phy = phy_get_drvdata(phy); + struct phy_pcie_instance *inst = phy_get_drvdata(phy); + struct rockchip_pcie_phy *rk_phy = to_pcie_phy(inst); int err = 0; u32 status; unsigned long timeout; + mutex_lock(&rk_phy->pcie_mutex); + + if (rk_phy->pwr_cnt++) + goto err_out; + err = reset_control_deassert(rk_phy->phy_rst); if (err) { dev_err(&phy->dev, "deassert phy_rst err %d\n", err); - return err; + goto err_pwr_cnt; } regmap_write(rk_phy->reg_base, rk_phy->phy_data->pcie_conf, @@ -146,6 +205,12 @@ static int rockchip_pcie_phy_power_on(struct phy *phy) PHY_CFG_ADDR_MASK, PHY_CFG_ADDR_SHIFT)); + regmap_write(rk_phy->reg_base, + rk_phy->phy_data->pcie_laneoff, + HIWORD_UPDATE(!PHY_LANE_IDLE_OFF, + PHY_LANE_IDLE_MASK, + PHY_LANE_IDLE_A_SHIFT + inst->index)); + /* * No documented timeout value for phy operation below, * so we make it large enough here. And we use loop-break @@ -214,18 +279,29 @@ static int rockchip_pcie_phy_power_on(struct phy *phy) goto err_pll_lock; } +err_out: + mutex_unlock(&rk_phy->pcie_mutex); return 0; err_pll_lock: reset_control_assert(rk_phy->phy_rst); +err_pwr_cnt: + --rk_phy->pwr_cnt; + mutex_unlock(&rk_phy->pcie_mutex); return err; } static int rockchip_pcie_phy_init(struct phy *phy) { - struct rockchip_pcie_phy *rk_phy = phy_get_drvdata(phy); + struct phy_pcie_instance *inst = phy_get_drvdata(phy); + struct rockchip_pcie_phy *rk_phy = to_pcie_phy(inst); int err = 0; + mutex_lock(&rk_phy->pcie_mutex); + + if (rk_phy->init_cnt++) + goto err_out; + err = clk_prepare_enable(rk_phy->clk_pciephy_ref); if (err) { dev_err(&phy->dev, "Fail to enable pcie ref clock.\n"); @@ -238,20 +314,33 @@ static int rockchip_pcie_phy_init(struct phy *phy) goto err_reset; } - return err; +err_out: + mutex_unlock(&rk_phy->pcie_mutex); + return 0; err_reset: + clk_disable_unprepare(rk_phy->clk_pciephy_ref); err_refclk: + --rk_phy->init_cnt; + mutex_unlock(&rk_phy->pcie_mutex); return err; } static int rockchip_pcie_phy_exit(struct phy *phy) { - struct rockchip_pcie_phy *rk_phy = phy_get_drvdata(phy); + struct phy_pcie_instance *inst = phy_get_drvdata(phy); + struct rockchip_pcie_phy *rk_phy = to_pcie_phy(inst); + + mutex_lock(&rk_phy->pcie_mutex); + + if (--rk_phy->init_cnt) + goto err_init_cnt; clk_disable_unprepare(rk_phy->clk_pciephy_ref); +err_init_cnt: + mutex_unlock(&rk_phy->pcie_mutex); return 0; } @@ -283,10 +372,10 @@ static int rockchip_pcie_phy_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct rockchip_pcie_phy *rk_phy; - struct phy *generic_phy; struct phy_provider *phy_provider; struct regmap *grf; const struct of_device_id *of_id; + int i; grf = syscon_node_to_regmap(dev->parent->of_node); if (IS_ERR(grf)) { @@ -305,6 +394,8 @@ static int rockchip_pcie_phy_probe(struct platform_device *pdev) rk_phy->phy_data = (struct rockchip_pcie_data *)of_id->data; rk_phy->reg_base = grf; + mutex_init(&rk_phy->pcie_mutex); + rk_phy->phy_rst = devm_reset_control_get(dev, "phy"); if (IS_ERR(rk_phy->phy_rst)) { if (PTR_ERR(rk_phy->phy_rst) != -EPROBE_DEFER) @@ -319,14 +410,19 @@ static int rockchip_pcie_phy_probe(struct platform_device *pdev) return PTR_ERR(rk_phy->clk_pciephy_ref); } - generic_phy = devm_phy_create(dev, dev->of_node, &ops); - if (IS_ERR(generic_phy)) { - dev_err(dev, "failed to create PHY\n"); - return PTR_ERR(generic_phy); + for (i = 0; i < PHY_MAX_LANE_NUM; i++) { + rk_phy->phys[i].phy = devm_phy_create(dev, dev->of_node, &ops); + if (IS_ERR(rk_phy->phys[i].phy)) { + dev_err(dev, "failed to create PHY%d\n", i); + return PTR_ERR(rk_phy->phys[i].phy); + } + rk_phy->phys[i].index = i; + phy_set_drvdata(rk_phy->phys[i].phy, &rk_phy->phys[i]); } - phy_set_drvdata(generic_phy, rk_phy); - phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + platform_set_drvdata(pdev, rk_phy); + phy_provider = devm_of_phy_provider_register(dev, + rockchip_pcie_phy_of_xlate); return PTR_ERR_OR_ZERO(phy_provider); }