ENGR00214799 MX6 PCIe enable the GEN2 mode

* enable PCIe on ARD boards
* Configure the DEEM parameters to pass PCIe GEN2 stress tests

Signed-off-by: Richard Zhu <Hong-Xing.Zhu@freescale.com>

diff --git a/arch/arm/mach-mx6/Kconfig b/arch/arm/mach-mx6/Kconfig
index a96597d2d59977e1ce0715fe4c22bb638d3c90a4..ea0c7e791bfaa2fb65fe0f52ae56ba2bad7f0d3e 100644 (file)
--- a/arch/arm/mach-mx6/Kconfig
+++ b/arch/arm/mach-mx6/Kconfig
@@ -200,6 +200,7 @@ config MACH_MX6Q_SABREAUTO
        select IMX_HAVE_PLATFORM_IMX_MIPI_DSI
        select IMX_HAVE_PLATFORM_FLEXCAN
        select IMX_HAVE_PLATFORM_IMX_MIPI_CSI2
+       select IMX_HAVE_PLATFORM_IMX_PCIE
        help
          Include support for i.MX 6Quad SABRE Auto platform. This includes specific
          configurations for the board and its peripherals.

diff --git a/arch/arm/mach-mx6/board-mx6q_arm2.c b/arch/arm/mach-mx6/board-mx6q_arm2.c
index 0852398e57a654f5d4406d14fa960146bbc8b4ac..7dce47fb2af216915781063b11d9bdde743997ac 100644 (file)
--- a/arch/arm/mach-mx6/board-mx6q_arm2.c
+++ b/arch/arm/mach-mx6/board-mx6q_arm2.c
@@ -2168,6 +2168,7 @@ static void __init mx6_arm2_init(void)
                mxc_register_device(&max17135_sensor_device, NULL);
                imx6dl_add_imx_epdc(&epdc_data);
        }
+       /* Add PCIe RC interface support */
        imx6q_add_pcie(&mx6_arm2_pcie_data);
        imx6q_add_busfreq();
 }

diff --git a/arch/arm/mach-mx6/board-mx6q_sabreauto.c b/arch/arm/mach-mx6/board-mx6q_sabreauto.c
index 656508f9fab8692d7a04e0b09015e19660949a0e..c26015607868abb1cb6da5d3aeb9d8cf73695414 100644 (file)
--- a/arch/arm/mach-mx6/board-mx6q_sabreauto.c
+++ b/arch/arm/mach-mx6/board-mx6q_sabreauto.c
@@ -120,6 +120,7 @@
 #define SABREAUTO_IO_EXP_GPIO2(x)      (SABREAUTO_MAX7310_2_BASE_ADDR + (x))
 #define SABREAUTO_IO_EXP_GPIO3(x)      (SABREAUTO_MAX7310_3_BASE_ADDR + (x))
 
+#define SABREAUTO_PCIE_RST_B_REVB      (SABREAUTO_MAX7310_1_BASE_ADDR + 2)
 /*
  * CAN2 STBY and EN lines are the same as the CAN1. These lines are not
  * independent.
@@ -1297,6 +1298,12 @@ static struct fsl_mxc_capture_platform_data capture_data[] = {
        },
 };
 
+static const struct imx_pcie_platform_data mx6_sabreauto_pcie_data __initconst = {
+       .pcie_pwr_en    = -EINVAL,
+       .pcie_rst       = SABREAUTO_PCIE_RST_B_REVB,
+       .pcie_wake_up   = -EINVAL,
+       .pcie_dis       = -EINVAL,
+};
 
 /*!
  * Board specific initialization.
@@ -1570,6 +1577,9 @@ static void __init mx6_board_init(void)
        mxc_register_device(&mxc_si4763_audio_device, &si4763_audio_data);
 
        imx6q_add_busfreq();
+
+       /* Add PCIe RC interface support */
+       imx6q_add_pcie(&mx6_sabreauto_pcie_data);
 }
 
 extern void __iomem *twd_base;

diff --git a/arch/arm/mach-mx6/board-mx6q_sabresd.c b/arch/arm/mach-mx6/board-mx6q_sabresd.c
index fdd702337aa317b70d3cfeac5193064305f48687..eaf1d770ab76901a5606466c8ad5c4734adf5a42 100644 (file)
--- a/arch/arm/mach-mx6/board-mx6q_sabresd.c
+++ b/arch/arm/mach-mx6/board-mx6q_sabresd.c
@@ -1797,6 +1797,7 @@ static void __init mx6_sabresd_board_init(void)
        pm_power_off = mx6_snvs_poweroff;
        imx6q_add_busfreq();
 
+       /* Add PCIe RC interface support */
        imx6q_add_pcie(&mx6_sabresd_pcie_data);
        if (cpu_is_mx6dl()) {
                mxc_iomux_v3_setup_multiple_pads(mx6dl_arm2_elan_pads,

diff --git a/arch/arm/mach-mx6/crm_regs.h b/arch/arm/mach-mx6/crm_regs.h
index c99caad1e776773a3832b6307386d988245376a3..2e1f3e4a32c497191f759d3510234335fc79c166 100644 (file)
--- a/arch/arm/mach-mx6/crm_regs.h
+++ b/arch/arm/mach-mx6/crm_regs.h
@@ -121,6 +121,7 @@
 #define ANADIG_PLL_ENET_POWER_DOWN             (1 << 12)
 #define ANADIG_PLL_ENET_DIV_SELECT_MASK                (0x3)
 #define ANADIG_PLL_ENET_DIV_SELECT_OFFSET      (0)
+#define ANATOP_BYPASS_SRC_LVDS1         0x00004000
 
 /* PFD register defines. */
 #define ANADIG_PFD_FRAC_MASK                   0x3F

diff --git a/arch/arm/mach-mx6/pcie.c b/arch/arm/mach-mx6/pcie.c
index 38e9abcd29cce936c4d23aec1e269df68c8f2225..f39dd3d4314b66e640c24199f8cdf601b54c58f9 100644 (file)
--- a/arch/arm/mach-mx6/pcie.c
+++ b/arch/arm/mach-mx6/pcie.c
@@ -606,6 +606,7 @@ static void imx_pcie_enable_controller(struct device *dev)
                pr_err("can't enable pcie clock.\n");
                clk_put(pcie_clk);
        }
+       imx_pcie_clrset(iomuxc_gpr1_pcie_ref_clk_en, 1 << 16, IOMUXC_GPR1);
 }
 
 static void card_reset(struct device *dev)
@@ -652,6 +653,9 @@ static void __init add_pcie_port(void __iomem *base, void __iomem *dbi_base,
                clk_disable(pcie_clk);
                clk_put(pcie_clk);
 
+               imx_pcie_clrset(iomuxc_gpr1_pcie_ref_clk_en, 0 << 16,
+                               IOMUXC_GPR1);
+
                /* Disable PCIE power */
                gpio_request(pdata->pcie_pwr_en, "PCIE POWER_EN");
 
@@ -669,7 +673,6 @@ static int __devinit imx_pcie_pltfm_probe(struct platform_device *pdev)
        struct device *dev = &pdev->dev;
        struct imx_pcie_platform_data *pdata = dev->platform_data;
 
-
        mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!mem) {
                dev_err(dev, "no mmio space\n");
@@ -698,15 +701,13 @@ static int __devinit imx_pcie_pltfm_probe(struct platform_device *pdev)
 
        imx_pcie_clrset(iomuxc_gpr8_tx_deemph_gen1, 0 << 0, IOMUXC_GPR8);
        imx_pcie_clrset(iomuxc_gpr8_tx_deemph_gen2_3p5db, 0 << 6, IOMUXC_GPR8);
-       imx_pcie_clrset(iomuxc_gpr8_tx_deemph_gen2_6db, 0 << 12, IOMUXC_GPR8);
+       imx_pcie_clrset(iomuxc_gpr8_tx_deemph_gen2_6db, 20 << 12, IOMUXC_GPR8);
        imx_pcie_clrset(iomuxc_gpr8_tx_swing_full, 127 << 18, IOMUXC_GPR8);
        imx_pcie_clrset(iomuxc_gpr8_tx_swing_low, 127 << 25, IOMUXC_GPR8);
 
        /* Enable the pwr, clks and so on */
        imx_pcie_enable_controller(dev);
 
-       imx_pcie_clrset(iomuxc_gpr1_pcie_ref_clk_en, 1 << 16, IOMUXC_GPR1);
-
        /* togle the external card's reset */
        card_reset(dev) ;
 
@@ -714,13 +715,6 @@ static int __devinit imx_pcie_pltfm_probe(struct platform_device *pdev)
        imx_pcie_regions_setup(dbi_base);
        usleep_range(3000, 4000);
 
-       /*
-        * Force to GEN1 because of PCIE2USB storage stress tests
-        * would be failed when GEN2 is enabled
-        */
-       writel(((readl(dbi_base + LNK_CAP) & 0xfffffff0) | 0x1),
-                       dbi_base + LNK_CAP);
-
        /* start link up */
        imx_pcie_clrset(iomuxc_gpr12_app_ltssm_enable, 1 << 10, IOMUXC_GPR12);
 
@@ -749,6 +743,8 @@ static int __devexit imx_pcie_pltfm_remove(struct platform_device *pdev)
                clk_put(pcie_clk);
        }
 
+       imx_pcie_clrset(iomuxc_gpr1_pcie_ref_clk_en, 0 << 16, IOMUXC_GPR1);
+
        /* Disable PCIE power */
        gpio_request(pdata->pcie_pwr_en, "PCIE POWER_EN");