| Message ID | 20170201165559.22436-4-andrew.smirnov@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Am Mittwoch, den 01.02.2017, 08:55 -0800 schrieb Andrey Smirnov: > Add various bits of code needed to support i.MX7D variant of the IP. > > Cc: yurovsky@gmail.com > Cc: Lucas Stach <l.stach@pengutronix.de> > Cc: Bjorn Helgaas <bhelgaas@google.com> > Cc: Rob Herring <robh+dt@kernel.org> > Cc: Mark Rutland <mark.rutland@arm.com> > Cc: Lee Jones <lee.jones@linaro.org> > Cc: linux-arm-kernel@lists.infradead.org > Cc: devicetree@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> > --- > .../devicetree/bindings/pci/fsl,imx6q-pcie.txt | 6 +- > drivers/pci/host/pci-imx6.c | 136 +++++++++++++++++---- > include/linux/mfd/syscon/imx7-gpc.h | 18 +++ > include/linux/mfd/syscon/imx7-iomuxc-gpr.h | 4 + > include/linux/mfd/syscon/imx7-src.h | 18 +++ > 5 files changed, 156 insertions(+), 26 deletions(-) > create mode 100644 include/linux/mfd/syscon/imx7-gpc.h > create mode 100644 include/linux/mfd/syscon/imx7-src.h > > diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt > index 83aeb1f..9f57759 100644 > --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt > +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt > @@ -4,7 +4,11 @@ This PCIe host controller is based on the Synopsis Designware PCIe IP > and thus inherits all the common properties defined in designware-pcie.txt. > > Required properties: > -- compatible: "fsl,imx6q-pcie", "fsl,imx6sx-pcie", "fsl,imx6qp-pcie" > +- compatible: > + - "fsl,imx6q-pcie" > + - "fsl,imx6sx-pcie", > + - "fsl,imx6qp-pcie" > + - "fsl,imx7d-pcie" > - reg: base address and length of the PCIe controller > - interrupts: A list of interrupt outputs of the controller. Must contain an > entry for each entry in the interrupt-names property. > diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c > index 3ef8093..e64ddd9 100644 > --- a/drivers/pci/host/pci-imx6.c > +++ b/drivers/pci/host/pci-imx6.c > @@ -17,6 +17,8 @@ > #include <linux/kernel.h> > #include <linux/mfd/syscon.h> > #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> > +#include <linux/mfd/syscon/imx7-iomuxc-gpr.h> > +#include <linux/mfd/syscon/imx7-src.h> > #include <linux/module.h> > #include <linux/of_gpio.h> > #include <linux/of_device.h> > @@ -27,6 +29,7 @@ > #include <linux/signal.h> > #include <linux/types.h> > #include <linux/interrupt.h> > +#include <linux/pm_domain.h> I don't think you need this include. PM domain handling should be done by the linux driver core if the pcie node is placed in the proper power-domain. The pcie driver should only indirectly handle pm domains via the runtime pm kernel facilities. > > #include "pcie-designware.h" > > @@ -36,6 +39,7 @@ enum imx6_pcie_variants { > IMX6Q, > IMX6SX, > IMX6QP, > + IMX7D, > }; > > struct imx6_pcie { > @@ -47,6 +51,7 @@ struct imx6_pcie { > struct clk *pcie_inbound_axi; > struct clk *pcie; > struct regmap *iomuxc_gpr; > + struct regmap *src; > enum imx6_pcie_variants variant; > u32 tx_deemph_gen1; > u32 tx_deemph_gen2_3p5db; > @@ -56,6 +61,11 @@ struct imx6_pcie { > int link_gen; > }; > > +/* Parameters for the waiting for PCIe PHY PLL to lock on i.MX7 */ > +#define PHY_PLL_LOCK_WAIT_MAX_RETRIES 2000 > +#define PHY_PLL_LOCK_WAIT_USLEEP_MIN 50 > +#define PHY_PLL_LOCK_WAIT_USLEEP_MAX 200 > + > /* PCIe Root Complex registers (memory-mapped) */ > #define PCIE_RC_LCR 0x7c > #define PCIE_RC_LCR_MAX_LINK_SPEEDS_GEN1 0x1 > @@ -251,6 +261,16 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) > u32 val, gpr1, gpr12; > > switch (imx6_pcie->variant) { > + case IMX7D: > + regmap_update_bits(imx6_pcie->src, > + SRC_PCIEPHY_RCR, > + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_G_RST, > + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_G_RST); > + regmap_update_bits(imx6_pcie->src, > + SRC_PCIEPHY_RCR, > + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_BTN, > + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_BTN); > + break; I suppose those are just some random bits tossed together, that can't reasonably be abstracted by a reset controller, right? In that case I'm fine with the code as is. > case IMX6SX: > regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, > IMX6SX_GPR12_PCIE_TEST_POWERDOWN, > @@ -333,11 +353,33 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) > regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, > IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16); > break; > + case IMX7D: > + break; > } > > return ret; > } > [...] > diff --git a/include/linux/mfd/syscon/imx7-gpc.h b/include/linux/mfd/syscon/imx7-gpc.h > new file mode 100644 > index 0000000..38e1c9a9 > --- /dev/null > +++ b/include/linux/mfd/syscon/imx7-gpc.h > @@ -0,0 +1,18 @@ > +/* > + * Copyright (C) 2017 Impinj > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + */ > + > +#ifndef __LINUX_IMX7_GPC_H > +#define __LINUX_IMX7_GPC_H > + > +#define GPC_PGC_CPU_MAPPING 0xec > +#define GPC_PU_PGC_SW_PUP_REQ 0xf8 > + > +#define IMX7D_PCIE_PHY_A7_DOMAIN BIT(3) > +#define IMX7D_PCIE_PHY_SW_PUP_REQ BIT(1) > + > +#endif This file isn't referenced in the patch anymore. Please remove. Regards, Lucas
On Wed, Feb 1, 2017 at 9:57 AM, Lucas Stach <l.stach@pengutronix.de> wrote: > Am Mittwoch, den 01.02.2017, 08:55 -0800 schrieb Andrey Smirnov: >> Add various bits of code needed to support i.MX7D variant of the IP. >> >> Cc: yurovsky@gmail.com >> Cc: Lucas Stach <l.stach@pengutronix.de> >> Cc: Bjorn Helgaas <bhelgaas@google.com> >> Cc: Rob Herring <robh+dt@kernel.org> >> Cc: Mark Rutland <mark.rutland@arm.com> >> Cc: Lee Jones <lee.jones@linaro.org> >> Cc: linux-arm-kernel@lists.infradead.org >> Cc: devicetree@vger.kernel.org >> Cc: linux-kernel@vger.kernel.org >> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> >> --- >> .../devicetree/bindings/pci/fsl,imx6q-pcie.txt | 6 +- >> drivers/pci/host/pci-imx6.c | 136 +++++++++++++++++---- >> include/linux/mfd/syscon/imx7-gpc.h | 18 +++ >> include/linux/mfd/syscon/imx7-iomuxc-gpr.h | 4 + >> include/linux/mfd/syscon/imx7-src.h | 18 +++ >> 5 files changed, 156 insertions(+), 26 deletions(-) >> create mode 100644 include/linux/mfd/syscon/imx7-gpc.h >> create mode 100644 include/linux/mfd/syscon/imx7-src.h >> >> diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt >> index 83aeb1f..9f57759 100644 >> --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt >> +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt >> @@ -4,7 +4,11 @@ This PCIe host controller is based on the Synopsis Designware PCIe IP >> and thus inherits all the common properties defined in designware-pcie.txt. >> >> Required properties: >> -- compatible: "fsl,imx6q-pcie", "fsl,imx6sx-pcie", "fsl,imx6qp-pcie" >> +- compatible: >> + - "fsl,imx6q-pcie" >> + - "fsl,imx6sx-pcie", >> + - "fsl,imx6qp-pcie" >> + - "fsl,imx7d-pcie" >> - reg: base address and length of the PCIe controller >> - interrupts: A list of interrupt outputs of the controller. Must contain an >> entry for each entry in the interrupt-names property. >> diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c >> index 3ef8093..e64ddd9 100644 >> --- a/drivers/pci/host/pci-imx6.c >> +++ b/drivers/pci/host/pci-imx6.c >> @@ -17,6 +17,8 @@ >> #include <linux/kernel.h> >> #include <linux/mfd/syscon.h> >> #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> >> +#include <linux/mfd/syscon/imx7-iomuxc-gpr.h> >> +#include <linux/mfd/syscon/imx7-src.h> >> #include <linux/module.h> >> #include <linux/of_gpio.h> >> #include <linux/of_device.h> >> @@ -27,6 +29,7 @@ >> #include <linux/signal.h> >> #include <linux/types.h> >> #include <linux/interrupt.h> >> +#include <linux/pm_domain.h> > > I don't think you need this include. PM domain handling should be done > by the linux driver core if the pcie node is placed in the proper > power-domain. > > The pcie driver should only indirectly handle pm domains via the runtime > pm kernel facilities. > You are right, I have no reason to have this include. It's just a experimentation leftover I forgot to remove. Will get rid of it in v3. >> >> #include "pcie-designware.h" >> >> @@ -36,6 +39,7 @@ enum imx6_pcie_variants { >> IMX6Q, >> IMX6SX, >> IMX6QP, >> + IMX7D, >> }; >> >> struct imx6_pcie { >> @@ -47,6 +51,7 @@ struct imx6_pcie { >> struct clk *pcie_inbound_axi; >> struct clk *pcie; >> struct regmap *iomuxc_gpr; >> + struct regmap *src; >> enum imx6_pcie_variants variant; >> u32 tx_deemph_gen1; >> u32 tx_deemph_gen2_3p5db; >> @@ -56,6 +61,11 @@ struct imx6_pcie { >> int link_gen; >> }; >> >> +/* Parameters for the waiting for PCIe PHY PLL to lock on i.MX7 */ >> +#define PHY_PLL_LOCK_WAIT_MAX_RETRIES 2000 >> +#define PHY_PLL_LOCK_WAIT_USLEEP_MIN 50 >> +#define PHY_PLL_LOCK_WAIT_USLEEP_MAX 200 >> + >> /* PCIe Root Complex registers (memory-mapped) */ >> #define PCIE_RC_LCR 0x7c >> #define PCIE_RC_LCR_MAX_LINK_SPEEDS_GEN1 0x1 >> @@ -251,6 +261,16 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) >> u32 val, gpr1, gpr12; >> >> switch (imx6_pcie->variant) { >> + case IMX7D: >> + regmap_update_bits(imx6_pcie->src, >> + SRC_PCIEPHY_RCR, >> + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_G_RST, >> + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_G_RST); >> + regmap_update_bits(imx6_pcie->src, >> + SRC_PCIEPHY_RCR, >> + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_BTN, >> + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_BTN); >> + break; > > I suppose those are just some random bits tossed together, that can't > reasonably be abstracted by a reset controller, right? In that case I'm > fine with the code as is. Hmm, good point, I didn't think of that. SRC is a system reset controller, after all, so I think it actually might be possible to do what you describe. I'll investigate the possibility and convert this if I can in v3. > >> case IMX6SX: >> regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, >> IMX6SX_GPR12_PCIE_TEST_POWERDOWN, >> @@ -333,11 +353,33 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) >> regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, >> IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16); >> break; >> + case IMX7D: >> + break; >> } >> >> return ret; >> } >> > [...] > >> diff --git a/include/linux/mfd/syscon/imx7-gpc.h b/include/linux/mfd/syscon/imx7-gpc.h >> new file mode 100644 >> index 0000000..38e1c9a9 >> --- /dev/null >> +++ b/include/linux/mfd/syscon/imx7-gpc.h >> @@ -0,0 +1,18 @@ >> +/* >> + * Copyright (C) 2017 Impinj >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License version 2 as >> + * published by the Free Software Foundation. >> + */ >> + >> +#ifndef __LINUX_IMX7_GPC_H >> +#define __LINUX_IMX7_GPC_H >> + >> +#define GPC_PGC_CPU_MAPPING 0xec >> +#define GPC_PU_PGC_SW_PUP_REQ 0xf8 >> + >> +#define IMX7D_PCIE_PHY_A7_DOMAIN BIT(3) >> +#define IMX7D_PCIE_PHY_SW_PUP_REQ BIT(1) >> + >> +#endif > > This file isn't referenced in the patch anymore. Please remove. More leftover code that I missed. Will remove in v3 and sorry for this noise. Thanks, Andrey
diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt index 83aeb1f..9f57759 100644 --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt @@ -4,7 +4,11 @@ This PCIe host controller is based on the Synopsis Designware PCIe IP and thus inherits all the common properties defined in designware-pcie.txt. Required properties: -- compatible: "fsl,imx6q-pcie", "fsl,imx6sx-pcie", "fsl,imx6qp-pcie" +- compatible: + - "fsl,imx6q-pcie" + - "fsl,imx6sx-pcie", + - "fsl,imx6qp-pcie" + - "fsl,imx7d-pcie" - reg: base address and length of the PCIe controller - interrupts: A list of interrupt outputs of the controller. Must contain an entry for each entry in the interrupt-names property. diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index 3ef8093..e64ddd9 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -17,6 +17,8 @@ #include <linux/kernel.h> #include <linux/mfd/syscon.h> #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> +#include <linux/mfd/syscon/imx7-iomuxc-gpr.h> +#include <linux/mfd/syscon/imx7-src.h> #include <linux/module.h> #include <linux/of_gpio.h> #include <linux/of_device.h> @@ -27,6 +29,7 @@ #include <linux/signal.h> #include <linux/types.h> #include <linux/interrupt.h> +#include <linux/pm_domain.h> #include "pcie-designware.h" @@ -36,6 +39,7 @@ enum imx6_pcie_variants { IMX6Q, IMX6SX, IMX6QP, + IMX7D, }; struct imx6_pcie { @@ -47,6 +51,7 @@ struct imx6_pcie { struct clk *pcie_inbound_axi; struct clk *pcie; struct regmap *iomuxc_gpr; + struct regmap *src; enum imx6_pcie_variants variant; u32 tx_deemph_gen1; u32 tx_deemph_gen2_3p5db; @@ -56,6 +61,11 @@ struct imx6_pcie { int link_gen; }; +/* Parameters for the waiting for PCIe PHY PLL to lock on i.MX7 */ +#define PHY_PLL_LOCK_WAIT_MAX_RETRIES 2000 +#define PHY_PLL_LOCK_WAIT_USLEEP_MIN 50 +#define PHY_PLL_LOCK_WAIT_USLEEP_MAX 200 + /* PCIe Root Complex registers (memory-mapped) */ #define PCIE_RC_LCR 0x7c #define PCIE_RC_LCR_MAX_LINK_SPEEDS_GEN1 0x1 @@ -251,6 +261,16 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) u32 val, gpr1, gpr12; switch (imx6_pcie->variant) { + case IMX7D: + regmap_update_bits(imx6_pcie->src, + SRC_PCIEPHY_RCR, + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_G_RST, + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_G_RST); + regmap_update_bits(imx6_pcie->src, + SRC_PCIEPHY_RCR, + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_BTN, + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_BTN); + break; case IMX6SX: regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX6SX_GPR12_PCIE_TEST_POWERDOWN, @@ -333,11 +353,33 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie) regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16); break; + case IMX7D: + break; } return ret; } +static void imx7d_pcie_wait_for_phy_pll_lock(struct imx6_pcie *imx6_pcie) +{ + u32 val; + unsigned int retries; + struct pcie_port *pp = &imx6_pcie->pp; + struct device *dev = pp->dev; + + for (retries = 0; retries < PHY_PLL_LOCK_WAIT_MAX_RETRIES; retries++) { + regmap_read(imx6_pcie->iomuxc_gpr, IOMUXC_GPR22, &val); + + if (val & IMX7D_GPR22_PCIE_PHY_PLL_LOCKED) + return; + + usleep_range(PHY_PLL_LOCK_WAIT_USLEEP_MIN, + PHY_PLL_LOCK_WAIT_USLEEP_MAX); + } + + dev_err(dev, "PCIe PLL lock timeout\n"); +} + static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) { struct pcie_port *pp = &imx6_pcie->pp; @@ -381,6 +423,21 @@ static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) } switch (imx6_pcie->variant) { + case IMX7D: + /* wait for more than 10us to release phy g_rst and btnrst */ + udelay(10); + regmap_update_bits(imx6_pcie->src, + SRC_PCIEPHY_RCR, + IMX7D_SRC_PCIEPHY_RCR_PCIE_CTRL_APPS_EN, 0); + regmap_update_bits(imx6_pcie->src, + SRC_PCIEPHY_RCR, + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_G_RST, 0); + regmap_update_bits(imx6_pcie->src, + SRC_PCIEPHY_RCR, + IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_BTN, 0); + + imx7d_pcie_wait_for_phy_pll_lock(imx6_pcie); + break; case IMX6SX: regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR5, IMX6SX_GPR5_PCIE_BTNRST_RESET, 0); @@ -407,35 +464,45 @@ static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie) { - if (imx6_pcie->variant == IMX6SX) + switch (imx6_pcie->variant) { + case IMX7D: { + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0); + break; + } + case IMX6SX: regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX6SX_GPR12_PCIE_RX_EQ_MASK, IMX6SX_GPR12_PCIE_RX_EQ_2); + /* FALLTHROUGH */ + default: + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6Q_GPR12_PCIE_CTL_2, 0 << 10); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6Q_GPR12_PCIE_CTL_2, 0 << 10); + /* configure constant input signal to the pcie ctrl and phy */ + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6Q_GPR12_LOS_LEVEL, 9 << 4); + + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_DEEMPH_GEN1, + imx6_pcie->tx_deemph_gen1 << 0); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_DEEMPH_GEN2_3P5DB, + imx6_pcie->tx_deemph_gen2_3p5db << 6); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_DEEMPH_GEN2_6DB, + imx6_pcie->tx_deemph_gen2_6db << 12); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_SWING_FULL, + imx6_pcie->tx_swing_full << 18); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_SWING_LOW, + imx6_pcie->tx_swing_low << 25); + break; + } - /* configure constant input signal to the pcie ctrl and phy */ regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX6Q_GPR12_DEVICE_TYPE, PCI_EXP_TYPE_ROOT_PORT << 12); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6Q_GPR12_LOS_LEVEL, 9 << 4); - - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_DEEMPH_GEN1, - imx6_pcie->tx_deemph_gen1 << 0); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_DEEMPH_GEN2_3P5DB, - imx6_pcie->tx_deemph_gen2_3p5db << 6); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_DEEMPH_GEN2_6DB, - imx6_pcie->tx_deemph_gen2_6db << 12); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_SWING_FULL, - imx6_pcie->tx_swing_full << 18); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, - IMX6Q_GPR8_TX_SWING_LOW, - imx6_pcie->tx_swing_low << 25); } static int imx6_pcie_wait_for_link(struct imx6_pcie *imx6_pcie) @@ -498,8 +565,14 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie) dw_pcie_writel_rc(pp, PCIE_RC_LCR, tmp); /* Start LTSSM. */ - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6Q_GPR12_PCIE_CTL_2, 1 << 10); + if (imx6_pcie->variant == IMX7D) + regmap_update_bits(imx6_pcie->src, + SRC_PCIEPHY_RCR, + IMX7D_SRC_PCIEPHY_RCR_PCIE_CTRL_APPS_EN, + IMX7D_SRC_PCIEPHY_RCR_PCIE_CTRL_APPS_EN); + else + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6Q_GPR12_PCIE_CTL_2, 1 << 10); ret = imx6_pcie_wait_for_link(imx6_pcie); if (ret) { @@ -676,13 +749,25 @@ static int imx6_pcie_probe(struct platform_device *pdev) return PTR_ERR(imx6_pcie->pcie); } - if (imx6_pcie->variant == IMX6SX) { + switch (imx6_pcie->variant) { + case IMX6SX: imx6_pcie->pcie_inbound_axi = devm_clk_get(dev, "pcie_inbound_axi"); if (IS_ERR(imx6_pcie->pcie_inbound_axi)) { dev_err(dev, "pcie_inbound_axi clock missing or invalid\n"); return PTR_ERR(imx6_pcie->pcie_inbound_axi); } + break; + case IMX7D: + imx6_pcie->src = + syscon_regmap_lookup_by_compatible("fsl,imx7d-src"); + if (IS_ERR(imx6_pcie->src)) { + dev_err(dev, "imx7d pcie phy src missing or invalid\n"); + return PTR_ERR(imx6_pcie->src); + } + break; + default: + break; } /* Grab GPR config register range */ @@ -740,6 +825,7 @@ static const struct of_device_id imx6_pcie_of_match[] = { { .compatible = "fsl,imx6q-pcie", .data = (void *)IMX6Q, }, { .compatible = "fsl,imx6sx-pcie", .data = (void *)IMX6SX, }, { .compatible = "fsl,imx6qp-pcie", .data = (void *)IMX6QP, }, + { .compatible = "fsl,imx7d-pcie", .data = (void *)IMX7D, }, {}, }; diff --git a/include/linux/mfd/syscon/imx7-gpc.h b/include/linux/mfd/syscon/imx7-gpc.h new file mode 100644 index 0000000..38e1c9a9 --- /dev/null +++ b/include/linux/mfd/syscon/imx7-gpc.h @@ -0,0 +1,18 @@ +/* + * Copyright (C) 2017 Impinj + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __LINUX_IMX7_GPC_H +#define __LINUX_IMX7_GPC_H + +#define GPC_PGC_CPU_MAPPING 0xec +#define GPC_PU_PGC_SW_PUP_REQ 0xf8 + +#define IMX7D_PCIE_PHY_A7_DOMAIN BIT(3) +#define IMX7D_PCIE_PHY_SW_PUP_REQ BIT(1) + +#endif diff --git a/include/linux/mfd/syscon/imx7-iomuxc-gpr.h b/include/linux/mfd/syscon/imx7-iomuxc-gpr.h index 4585d61..abbd524 100644 --- a/include/linux/mfd/syscon/imx7-iomuxc-gpr.h +++ b/include/linux/mfd/syscon/imx7-iomuxc-gpr.h @@ -44,4 +44,8 @@ #define IMX7D_GPR5_CSI_MUX_CONTROL_MIPI (0x1 << 4) +#define IMX7D_GPR12_PCIE_PHY_REFCLK_SEL BIT(5) + +#define IMX7D_GPR22_PCIE_PHY_PLL_LOCKED BIT(31) + #endif /* __LINUX_IMX7_IOMUXC_GPR_H */ diff --git a/include/linux/mfd/syscon/imx7-src.h b/include/linux/mfd/syscon/imx7-src.h new file mode 100644 index 0000000..fdc4806 --- /dev/null +++ b/include/linux/mfd/syscon/imx7-src.h @@ -0,0 +1,18 @@ +/* + * Copyright (C) 2017 Impinj + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __LINUX_IMX7_SRC_H +#define __LINUX_IMX7_SRC_H + +#define SRC_PCIEPHY_RCR 0x2c + +#define IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_G_RST BIT(1) +#define IMX7D_SRC_PCIEPHY_RCR_PCIEPHY_BTN BIT(2) +#define IMX7D_SRC_PCIEPHY_RCR_PCIE_CTRL_APPS_EN BIT(6) + +#endif /* __LINUX_IMX7_IOMUXC_GPR_H */
Add various bits of code needed to support i.MX7D variant of the IP. Cc: yurovsky@gmail.com Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Lee Jones <lee.jones@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> --- .../devicetree/bindings/pci/fsl,imx6q-pcie.txt | 6 +- drivers/pci/host/pci-imx6.c | 136 +++++++++++++++++---- include/linux/mfd/syscon/imx7-gpc.h | 18 +++ include/linux/mfd/syscon/imx7-iomuxc-gpr.h | 4 + include/linux/mfd/syscon/imx7-src.h | 18 +++ 5 files changed, 156 insertions(+), 26 deletions(-) create mode 100644 include/linux/mfd/syscon/imx7-gpc.h create mode 100644 include/linux/mfd/syscon/imx7-src.h