Exynos PCIe IP consists of Synopsys specific part and Exynos
specific part. Only core block is a Synopsys designware part;
other parts are Exynos specific.
Also, the Synopsys designware part can be shared with other
platforms; thus, it can be split two parts such as Synopsys
designware part and Exynos specific part.
Signed-off-by: Jingoo Han <jg1.han@xxxxxxxxxxx>
Cc: Pratyush Anand <pratyush.anand@xxxxxx>
Cc: Mohit KUMAR <Mohit.KUMAR@xxxxxx>
---
Changes since v2:
- replaced 'pcie-' prefix with 'pci-' prefix
- made the number of lanes configurable
- added 'num-lanes' property
- added a 'struct exynos_pcie'
.../devicetree/bindings/pci/designware-pcie.txt | 3 +
arch/arm/boot/dts/exynos5440.dtsi | 2 +
drivers/pci/host/Makefile | 1 +
drivers/pci/host/pci-exynos.c | 552 +++++++++++
drivers/pci/host/pcie-designware.c | 998 +++++---------------
drivers/pci/host/pcie-designware.h | 65 ++
6 files changed, 882 insertions(+), 739 deletions(-)
create mode 100644 drivers/pci/host/pci-exynos.c
create mode 100644 drivers/pci/host/pcie-designware.h
diff --git a/Documentation/devicetree/bindings/pci/designware-pcie.txt b/Documentation/devicetree/bindings/pci/designware-pcie.txt
index e2371f5..eabcb4b 100644
--- a/Documentation/devicetree/bindings/pci/designware-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/designware-pcie.txt
@@ -18,6 +18,7 @@ Required properties:
- interrupt-map-mask and interrupt-map: standard PCI properties
to define the mapping of the PCIe interface to interrupt
numbers.
+- num-lanes: number of lanes to use
- reset-gpio: gpio pin number of power good signal
Example:
@@ -41,6 +42,7 @@ SoC specific DT Entry:
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0>;
interrupt-map = <0x0 0 &gic 53>;
+ num-lanes = <4>;
};
pcie@2a0000 {
@@ -60,6 +62,7 @@ SoC specific DT Entry:
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0>;
interrupt-map = <0x0 0 &gic 56>;
+ num-lanes = <4>;
};
Board specific DT Entry:
diff --git a/arch/arm/boot/dts/exynos5440.dtsi b/arch/arm/boot/dts/exynos5440.dtsi
index ff7f5d8..586134e 100644
--- a/arch/arm/boot/dts/exynos5440.dtsi
+++ b/arch/arm/boot/dts/exynos5440.dtsi
@@ -248,6 +248,7 @@
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0>;
interrupt-map = <0x0 0 &gic 53>;
+ num-lanes = <4>;
};
pcie@2a0000 {
@@ -267,5 +268,6 @@
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0>;
interrupt-map = <0x0 0 &gic 56>;
+ num-lanes = <4>;
};
};
diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile
index 086d850..701acd1 100644
--- a/drivers/pci/host/Makefile
+++ b/drivers/pci/host/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_PCI_MVEBU) += pci-mvebu.o
obj-$(CONFIG_PCIE_DW) += pcie-designware.o
+obj-$(CONFIG_PCI_EXYNOS) += pci-exynos.o
diff --git a/drivers/pci/host/pci-exynos.c b/drivers/pci/host/pci-exynos.c
new file mode 100644
index 0000000..3fe7ce4
--- /dev/null
+++ b/drivers/pci/host/pci-exynos.c
@@ -0,0 +1,552 @@
+/*
+ * PCIe host controller driver for Samsung EXYNOS SoCs
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Jingoo Han <jg1.han@xxxxxxxxxxx>
+ *
+ * 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.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_gpio.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/resource.h>
+#include <linux/signal.h>
+#include <linux/types.h>
+
+#include "pcie-designware.h"
+
+#define to_exynos_pcie(x) container_of(x, struct exynos_pcie, pp)
+
+struct exynos_pcie {
+ void __iomem *elbi_base;
+ void __iomem *phy_base;
+ void __iomem *block_base;
+ int reset_gpio;
+ struct clk *clk;
+ struct clk *bus_clk;
+ struct pcie_port pp;
+};
+
+/* PCIe ELBI registers */
+#define PCIE_IRQ_PULSE 0x000
+#define IRQ_INTA_ASSERT (0x1 << 0)
+#define IRQ_INTB_ASSERT (0x1 << 2)
+#define IRQ_INTC_ASSERT (0x1 << 4)
+#define IRQ_INTD_ASSERT (0x1 << 6)
+#define PCIE_IRQ_LEVEL 0x004
+#define PCIE_IRQ_SPECIAL 0x008
+#define PCIE_IRQ_EN_PULSE 0x00c
+#define PCIE_IRQ_EN_LEVEL 0x010
+#define PCIE_IRQ_EN_SPECIAL 0x014
+#define PCIE_PWR_RESET 0x018
+#define PCIE_CORE_RESET 0x01c
+#define PCIE_CORE_RESET_ENABLE (0x1 << 0)
+#define PCIE_STICKY_RESET 0x020
+#define PCIE_NONSTICKY_RESET 0x024
+#define PCIE_APP_INIT_RESET 0x028
+#define PCIE_APP_LTSSM_ENABLE 0x02c
+#define PCIE_ELBI_RDLH_LINKUP 0x064
+#define PCIE_ELBI_LTSSM_ENABLE 0x1
+#define PCIE_ELBI_SLV_AWMISC 0x11c
+#define PCIE_ELBI_SLV_ARMISC 0x120
+#define PCIE_ELBI_SLV_DBI_ENABLE (0x1 << 21)
+
+/* PCIe Purple registers */
+#define PCIE_PHY_GLOBAL_RESET 0x000
+#define PCIE_PHY_COMMON_RESET 0x004
+#define PCIE_PHY_CMN_REG 0x008
+#define PCIE_PHY_MAC_RESET 0x00c
+#define PCIE_PHY_PLL_LOCKED 0x010
+#define PCIE_PHY_TRSVREG_RESET 0x020
+#define PCIE_PHY_TRSV_RESET 0x024
+
+/* PCIe PHY registers */
+#define PCIE_PHY_IMPEDANCE 0x004
+#define PCIE_PHY_PLL_DIV_0 0x008
+#define PCIE_PHY_PLL_BIAS 0x00c
+#define PCIE_PHY_DCC_FEEDBACK 0x014
+#define PCIE_PHY_PLL_DIV_1 0x05c
+#define PCIE_PHY_TRSV0_EMP_LVL 0x084
+#define PCIE_PHY_TRSV0_DRV_LVL 0x088
+#define PCIE_PHY_TRSV0_RXCDR 0x0ac
+#define PCIE_PHY_TRSV0_LVCC 0x0dc
+#define PCIE_PHY_TRSV1_EMP_LVL 0x144
+#define PCIE_PHY_TRSV1_RXCDR 0x16c
+#define PCIE_PHY_TRSV1_LVCC 0x19c
+#define PCIE_PHY_TRSV2_EMP_LVL 0x204
+#define PCIE_PHY_TRSV2_RXCDR 0x22c
+#define PCIE_PHY_TRSV2_LVCC 0x25c
+#define PCIE_PHY_TRSV3_EMP_LVL 0x2c4
+#define PCIE_PHY_TRSV3_RXCDR 0x2ec
+#define PCIE_PHY_TRSV3_LVCC 0x31c
+
+static void exynos_pcie_sideband_dbi_w_mode(struct pcie_port *pp, bool on)
+{
+ u32 val;
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+
+ if (on) {
+ val = readl(exynos_pcie->elbi_base + PCIE_ELBI_SLV_AWMISC);
+ val |= PCIE_ELBI_SLV_DBI_ENABLE;
+ writel(val, exynos_pcie->elbi_base + PCIE_ELBI_SLV_AWMISC);
+ } else {
+ val = readl(exynos_pcie->elbi_base + PCIE_ELBI_SLV_AWMISC);
+ val &= ~PCIE_ELBI_SLV_DBI_ENABLE;
+ writel(val, exynos_pcie->elbi_base + PCIE_ELBI_SLV_AWMISC);
+ }
+}
+
+static void exynos_pcie_sideband_dbi_r_mode(struct pcie_port *pp, bool on)
+{
+ u32 val;
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+
+ if (on) {
+ val = readl(exynos_pcie->elbi_base + PCIE_ELBI_SLV_ARMISC);
+ val |= PCIE_ELBI_SLV_DBI_ENABLE;
+ writel(val, exynos_pcie->elbi_base + PCIE_ELBI_SLV_ARMISC);
+ } else {
+ val = readl(exynos_pcie->elbi_base + PCIE_ELBI_SLV_ARMISC);
+ val &= ~PCIE_ELBI_SLV_DBI_ENABLE;
+ writel(val, exynos_pcie->elbi_base + PCIE_ELBI_SLV_ARMISC);
+ }
+}
+
+static void exynos_pcie_assert_core_reset(struct pcie_port *pp)
+{
+ u32 val;
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ void __iomem *elbi_base = exynos_pcie->elbi_base;
+
+ val = readl(elbi_base + PCIE_CORE_RESET);
+ val &= ~PCIE_CORE_RESET_ENABLE;
+ writel(val, elbi_base + PCIE_CORE_RESET);
+ writel(0, elbi_base + PCIE_PWR_RESET);
+ writel(0, elbi_base + PCIE_STICKY_RESET);
+ writel(0, elbi_base + PCIE_NONSTICKY_RESET);
+}
+
+static void exynos_pcie_deassert_core_reset(struct pcie_port *pp)
+{
+ u32 val;
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ void __iomem *elbi_base = exynos_pcie->elbi_base;
+ void __iomem *block_base = exynos_pcie->block_base;
+
+ val = readl(elbi_base + PCIE_CORE_RESET);
+ val |= PCIE_CORE_RESET_ENABLE;
+ writel(val, elbi_base + PCIE_CORE_RESET);
+ writel(1, elbi_base + PCIE_STICKY_RESET);
+ writel(1, elbi_base + PCIE_NONSTICKY_RESET);
+ writel(1, elbi_base + PCIE_APP_INIT_RESET);
+ writel(0, elbi_base + PCIE_APP_INIT_RESET);
+ writel(1, block_base + PCIE_PHY_MAC_RESET);
+}
+
+static void exynos_pcie_assert_phy_reset(struct pcie_port *pp)
+{
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ void __iomem *block_base = exynos_pcie->block_base;
+
+ writel(0, block_base + PCIE_PHY_MAC_RESET);
+ writel(1, block_base + PCIE_PHY_GLOBAL_RESET);
+}
+
+static void exynos_pcie_deassert_phy_reset(struct pcie_port *pp)
+{
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ void __iomem *elbi_base = exynos_pcie->elbi_base;
+ void __iomem *block_base = exynos_pcie->block_base;
+
+ writel(0, block_base + PCIE_PHY_GLOBAL_RESET);
+ writel(1, elbi_base + PCIE_PWR_RESET);
+ writel(0, block_base + PCIE_PHY_COMMON_RESET);
+ writel(0, block_base + PCIE_PHY_CMN_REG);
+ writel(0, block_base + PCIE_PHY_TRSVREG_RESET);
+ writel(0, block_base + PCIE_PHY_TRSV_RESET);
+}
+
+static void exynos_pcie_init_phy(struct pcie_port *pp)
+{
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ void __iomem *phy_base = exynos_pcie->phy_base;
+
+ /* DCC feedback control off */
+ writel(0x29, phy_base + PCIE_PHY_DCC_FEEDBACK);
+
+ /* set TX/RX impedance */
+ writel(0xd5, phy_base + PCIE_PHY_IMPEDANCE);
+
+ /* set 50Mhz PHY clock */
+ writel(0x14, phy_base + PCIE_PHY_PLL_DIV_0);
+ writel(0x12, phy_base + PCIE_PHY_PLL_DIV_1);
+
+ /* set TX Differential output for lane 0 */
+ writel(0x7f, phy_base + PCIE_PHY_TRSV0_DRV_LVL);
+
+ /* set TX Pre-emphasis Level Control for lane 0 to minimum */
+ writel(0x0, phy_base + PCIE_PHY_TRSV0_EMP_LVL);
+
+ /* set RX clock and data recovery bandwidth */
+ writel(0xe7, phy_base + PCIE_PHY_PLL_BIAS);
+ writel(0x82, phy_base + PCIE_PHY_TRSV0_RXCDR);
+ writel(0x82, phy_base + PCIE_PHY_TRSV1_RXCDR);
+ writel(0x82, phy_base + PCIE_PHY_TRSV2_RXCDR);
+ writel(0x82, phy_base + PCIE_PHY_TRSV3_RXCDR);
+
+ /* change TX Pre-emphasis Level Control for lanes */
+ writel(0x39, phy_base + PCIE_PHY_TRSV0_EMP_LVL);
+ writel(0x39, phy_base + PCIE_PHY_TRSV1_EMP_LVL);
+ writel(0x39, phy_base + PCIE_PHY_TRSV2_EMP_LVL);
+ writel(0x39, phy_base + PCIE_PHY_TRSV3_EMP_LVL);
+
+ /* set LVCC */
+ writel(0x20, phy_base + PCIE_PHY_TRSV0_LVCC);
+ writel(0xa0, phy_base + PCIE_PHY_TRSV1_LVCC);
+ writel(0xa0, phy_base + PCIE_PHY_TRSV2_LVCC);
+ writel(0xa0, phy_base + PCIE_PHY_TRSV3_LVCC);
+}
+
+static void exynos_pcie_assert_reset(struct pcie_port *pp)
+{
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+
+ if (exynos_pcie->reset_gpio >= 0)
+ devm_gpio_request_one(pp->dev, exynos_pcie->reset_gpio,
+ GPIOF_OUT_INIT_HIGH, "RESET");
+ return;
+}
+
+static int exynos_pcie_establish_link(struct pcie_port *pp)
+{
+ u32 val;
+ int count = 0;
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ void __iomem *elbi_base = exynos_pcie->elbi_base;
+ void __iomem *block_base = exynos_pcie->block_base;
+ void __iomem *phy_base = exynos_pcie->phy_base;
+
+ if (dw_pcie_link_up(pp)) {
+ dev_err(pp->dev, "Link already up\n");
+ return 0;
+ }
+
+ /* assert reset signals */
+ exynos_pcie_assert_core_reset(pp);
+ exynos_pcie_assert_phy_reset(pp);
+
+ /* de-assert phy reset */
+ exynos_pcie_deassert_phy_reset(pp);
+
+ /* initialize phy */
+ exynos_pcie_init_phy(pp);
+
+ /* pulse for common reset */
+ writel(1, block_base + PCIE_PHY_COMMON_RESET);
+ udelay(500);
+ writel(0, block_base + PCIE_PHY_COMMON_RESET);
+
+ /* de-assert core reset */
+ exynos_pcie_deassert_core_reset(pp);
+
+ /* setup root complex */
+ dw_pcie_setup_rc(pp);
+
+ /* assert reset signal */
+ exynos_pcie_assert_reset(pp);
+
+ /* assert LTSSM enable */
+ writel(PCIE_ELBI_LTSSM_ENABLE, elbi_base + PCIE_APP_LTSSM_ENABLE);
+
+ /* check if the link is up or not */
+ while (!dw_pcie_link_up(pp)) {
+ mdelay(100);
+ count++;
+ if (count == 10) {
+ while (readl(phy_base + PCIE_PHY_PLL_LOCKED) == 0) {
+ val = readl(block_base + PCIE_PHY_PLL_LOCKED);
+ dev_info(pp->dev, "PLL Locked: 0x%x\n", val);
+ }
+ dev_err(pp->dev, "PCIe Link Fail\n");
+ return -EINVAL;
+ }
+ }
+
+ dev_info(pp->dev, "Link up\n");
+
+ return 0;
+}
+
+static void exynos_pcie_clear_irq_pulse(struct pcie_port *pp)
+{
+ u32 val;
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ void __iomem *elbi_base = exynos_pcie->elbi_base;
+
+ val = readl(elbi_base + PCIE_IRQ_PULSE);
+ writel(val, elbi_base + PCIE_IRQ_PULSE);
+ return;
+}
+
+static void exynos_pcie_enable_irq_pulse(struct pcie_port *pp)
+{
+ u32 val;
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ void __iomem *elbi_base = exynos_pcie->elbi_base;
+
+ /* enable INTX interrupt */
+ val = IRQ_INTA_ASSERT | IRQ_INTB_ASSERT |
+ IRQ_INTC_ASSERT | IRQ_INTD_ASSERT,
+ writel(val, elbi_base + PCIE_IRQ_EN_PULSE);
+ return;
+}
+
+static irqreturn_t exynos_pcie_irq_handler(int irq, void *arg)
+{
+ struct pcie_port *pp = arg;
+
+ exynos_pcie_clear_irq_pulse(pp);
+ return IRQ_HANDLED;
+}
+
+static void exynos_pcie_enable_interrupts(struct pcie_port *pp)
+{
+ exynos_pcie_enable_irq_pulse(pp);
+ return;
+}
+
+static inline void exynos_pcie_readl_rc(struct pcie_port *pp, void *dbi_base,
+ u32 *val)
+{
+ exynos_pcie_sideband_dbi_r_mode(pp, true);
+ *val = readl(dbi_base);
+ exynos_pcie_sideband_dbi_r_mode(pp, false);
+ return;
+}
+
+static inline void exynos_pcie_writel_rc(struct pcie_port *pp, u32 val,
+ void *dbi_base)
+{
+ exynos_pcie_sideband_dbi_w_mode(pp, true);
+ writel(val, dbi_base);
+ exynos_pcie_sideband_dbi_w_mode(pp, false);
+ return;
+}
+
+static int exynos_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
+ u32 *val)
+{
+ int ret;
+
+ exynos_pcie_sideband_dbi_r_mode(pp, true);
+ ret = cfg_read(pp->dbi_base + (where & ~0x3), where, size, val);
+ exynos_pcie_sideband_dbi_r_mode(pp, false);
+ return ret;
+}
+
+static int exynos_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
+ u32 val)
+{
+ int ret;
+
+ exynos_pcie_sideband_dbi_w_mode(pp, true);
+ ret = cfg_write(pp->dbi_base + (where & ~0x3), where, size, val);
+ exynos_pcie_sideband_dbi_w_mode(pp, false);
+ return ret;
+}
+
+static int exynos_pcie_link_up(struct pcie_port *pp)
+{
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ u32 val = readl(exynos_pcie->elbi_base + PCIE_ELBI_RDLH_LINKUP);
+
+ if (val == PCIE_ELBI_LTSSM_ENABLE)
+ return 1;
+
+ return 0;
+}
+
+static void exynos_pcie_host_init(struct pcie_port *pp)
+{
+ exynos_pcie_establish_link(pp);
+ exynos_pcie_enable_interrupts(pp);
+}
+
+static struct pcie_host_ops exynos_pcie_host_ops = {
+ .readl_rc = exynos_pcie_readl_rc,
+ .writel_rc = exynos_pcie_writel_rc,
+ .rd_own_conf = exynos_pcie_rd_own_conf,
+ .wr_own_conf = exynos_pcie_wr_own_conf,
+ .link_up = exynos_pcie_link_up,
+ .host_init = exynos_pcie_host_init,
+};
+
+static int add_pcie_port(struct pcie_port *pp, struct platform_device *pdev)
+{
+ struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
+ struct resource *elbi_base;
+ struct resource *phy_base;
+ struct resource *block_base;
+ int ret;
+
+ elbi_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!elbi_base) {
+ dev_err(&pdev->dev, "couldn't get elbi base resource\n");
+ return -EINVAL;
+ }
+ exynos_pcie->elbi_base = devm_ioremap_resource(&pdev->dev, elbi_base);
+ if (IS_ERR(exynos_pcie->elbi_base))
+ return PTR_ERR(exynos_pcie->elbi_base);
+
+ phy_base = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!phy_base) {
+ dev_err(&pdev->dev, "couldn't get phy base resource\n");
+ return -EINVAL;
+ }
+ exynos_pcie->phy_base = devm_ioremap_resource(&pdev->dev, phy_base);
+ if (IS_ERR(exynos_pcie->phy_base))
+ return PTR_ERR(exynos_pcie->phy_base);
+
+ block_base = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+ if (!block_base) {
+ dev_err(&pdev->dev, "couldn't get block base resource\n");
+ return -EINVAL;
+ }
+ exynos_pcie->block_base = devm_ioremap_resource(&pdev->dev, block_base);
+ if (IS_ERR(exynos_pcie->block_base))
+ return PTR_ERR(exynos_pcie->block_base);
+
+ pp->irq = platform_get_irq(pdev, 1);
+ if (!pp->irq) {
+ dev_err(&pdev->dev, "failed to get irq\n");
+ return -ENODEV;
+ }
+ ret = devm_request_irq(&pdev->dev, pp->irq, exynos_pcie_irq_handler,
+ IRQF_SHARED, "exynos-pcie", pp);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request irq\n");
+ return ret;
+ }
+
+ pp->root_bus_nr = -1;
+ pp->ops = &exynos_pcie_host_ops;
+
+ spin_lock_init(&pp->conf_lock);
+ ret = dw_pcie_host_init(pp);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize host\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __init exynos_pcie_probe(struct platform_device *pdev)
+{
+ struct exynos_pcie *exynos_pcie;
+ struct pcie_port *pp;
+ struct device_node *np = pdev->dev.of_node;
+ int ret;
+
+ exynos_pcie = devm_kzalloc(&pdev->dev, sizeof(*exynos_pcie),
+ GFP_KERNEL);
+ if (!exynos_pcie) {
+ dev_err(&pdev->dev, "no memory for exynos pcie\n");
+ return -ENOMEM;
+ }
+
+ pp = &exynos_pcie->pp;
+
+ pp->dev = &pdev->dev;
+
+ exynos_pcie->reset_gpio = of_get_named_gpio(np, "reset-gpio", 0);
+
+ exynos_pcie->clk = devm_clk_get(&pdev->dev, "pcie");
+ if (IS_ERR(exynos_pcie->clk)) {
+ dev_err(&pdev->dev, "Failed to get pcie rc clock\n");
+ return PTR_ERR(exynos_pcie->clk);
+ }
+ ret = clk_prepare_enable(exynos_pcie->clk);
+ if (ret)
+ return ret;
+
+ exynos_pcie->bus_clk = devm_clk_get(&pdev->dev, "pcie_bus");
+ if (IS_ERR(exynos_pcie->bus_clk)) {
+ dev_err(&pdev->dev, "Failed to get pcie bus clock\n");
+ ret = PTR_ERR(exynos_pcie->bus_clk);
+ goto fail_clk;
+ }
+ ret = clk_prepare_enable(exynos_pcie->bus_clk);
+ if (ret)
+ goto fail_clk;
+
+ ret = add_pcie_port(pp, pdev);
+ if (ret < 0)
+ goto fail_bus_clk;
+
+ dw_pci.nr_controllers = 1;
+ dw_pci.private_data = (void **)&pp;
+
+ pci_common_init(&dw_pci);
+ pci_assign_unassigned_resources();
+#ifdef CONFIG_PCI_DOMAINS
+ dw_pci.domain++;
+#endif
+
+ platform_set_drvdata(pdev, exynos_pcie);
+ return 0;
+
+fail_bus_clk:
+ clk_disable_unprepare(exynos_pcie->bus_clk);
+fail_clk:
+ clk_disable_unprepare(exynos_pcie->clk);
+ return ret;
+}
+
+static int __exit exynos_pcie_remove(struct platform_device *pdev)
+{
+ struct exynos_pcie *exynos_pcie = platform_get_drvdata(pdev);
+
+ clk_disable_unprepare(exynos_pcie->bus_clk);
+ clk_disable_unprepare(exynos_pcie->clk);
+
+ return 0;
+}
+
+static const struct of_device_id exynos_pcie_of_match[] = {
+ { .compatible = "samsung,exynos5440-pcie", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, exynos_pcie_of_match);
+
+static struct platform_driver exynos_pcie_driver = {
+ .remove = __exit_p(exynos_pcie_remove),
+ .driver = {
+ .name = "exynos-pcie",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(exynos_pcie_of_match),
+ },
+};
+
+/* Exynos PCIe driver does not allow module unload */
+
+static int __init pcie_init(void)
+{
+ return platform_driver_probe(&exynos_pcie_driver, exynos_pcie_probe);
+}
+subsys_initcall(pcie_init);
+
+MODULE_AUTHOR("Jingoo Han <jg1.han@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("Samsung PCIe host controller driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 26bdbda..f097eff 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -1,5 +1,5 @@
/*
- * PCIe host controller driver for Samsung EXYNOS SoCs
+ * Synopsys Designware PCIe host controller driver
*
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
* http://www.samsung.com
@@ -11,74 +11,28 @@
* published by the Free Software Foundation.
*/
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/gpio.h>
-#include <linux/interrupt.h>
#include <linux/kernel.h>
-#include <linux/list.h>
#include <linux/module.h>
-#include <linux/of.h>
#include <linux/of_address.h>
-#include <linux/of_gpio.h>
-#include <linux/of_pci.h>
#include <linux/pci.h>
#include <linux/pci_regs.h>
-#include <linux/platform_device.h>
-#include <linux/resource.h>
-#include <linux/signal.h>
-#include <linux/slab.h>
#include <linux/types.h>
-struct pcie_port_info {
- u32 cfg0_size;
- u32 cfg1_size;
- u32 io_size;
- u32 mem_size;
- phys_addr_t io_bus_addr;
- phys_addr_t mem_bus_addr;
-};
-
-struct pcie_port {
- struct device *dev;
- u8 controller;
- u8 root_bus_nr;
- void __iomem *dbi_base;
- void __iomem *elbi_base;
- void __iomem *phy_base;
- void __iomem *purple_base;
- u64 cfg0_base;
- void __iomem *va_cfg0_base;
- u64 cfg1_base;
- void __iomem *va_cfg1_base;
- u64 io_base;
- u64 mem_base;
- spinlock_t conf_lock;
- struct resource cfg;
- struct resource io;
- struct resource mem;
- struct pcie_port_info config;
- struct clk *clk;
- struct clk *bus_clk;
- int irq;
- int reset_gpio;
-};
-
-/*
- * Exynos PCIe IP consists of Synopsys specific part and Exynos
- * specific part. Only core block is a Synopsys designware part;
- * other parts are Exynos specific.
- */
+#include "pcie-designware.h"
/* Synopsis specific PCIE configuration registers */
#define PCIE_PORT_LINK_CONTROL 0x710
#define PORT_LINK_MODE_MASK (0x3f << 16)
+#define PORT_LINK_MODE_1_LANES (0x1 << 16)
+#define PORT_LINK_MODE_2_LANES (0x3 << 16)
#define PORT_LINK_MODE_4_LANES (0x7 << 16)
#define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C
#define PORT_LOGIC_SPEED_CHANGE (0x1 << 17)
#define PORT_LOGIC_LINK_WIDTH_MASK (0x1ff << 8)
-#define PORT_LOGIC_LINK_WIDTH_4_LANES (0x7 << 8)
+#define PORT_LOGIC_LINK_WIDTH_1_LANES (0x1 << 8)
+#define PORT_LOGIC_LINK_WIDTH_2_LANES (0x2 << 8)
+#define PORT_LOGIC_LINK_WIDTH_4_LANES (0x4 << 8)
#define PCIE_MSI_ADDR_LO 0x820
#define PCIE_MSI_ADDR_HI 0x824
@@ -108,69 +62,14 @@ struct pcie_port {
#define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16)
#define PCIE_ATU_UPPER_TARGET 0x91C
-/* Exynos specific PCIE configuration registers */
-
-/* PCIe ELBI registers */
-#define PCIE_IRQ_PULSE 0x000
-#define IRQ_INTA_ASSERT (0x1 << 0)
-#define IRQ_INTB_ASSERT (0x1 << 2)
-#define IRQ_INTC_ASSERT (0x1 << 4)
-#define IRQ_INTD_ASSERT (0x1 << 6)
-#define PCIE_IRQ_LEVEL 0x004
-#define PCIE_IRQ_SPECIAL 0x008
-#define PCIE_IRQ_EN_PULSE 0x00c
-#define PCIE_IRQ_EN_LEVEL 0x010
-#define PCIE_IRQ_EN_SPECIAL 0x014
-#define PCIE_PWR_RESET 0x018
-#define PCIE_CORE_RESET 0x01c
-#define PCIE_CORE_RESET_ENABLE (0x1 << 0)
-#define PCIE_STICKY_RESET 0x020
-#define PCIE_NONSTICKY_RESET 0x024
-#define PCIE_APP_INIT_RESET 0x028
-#define PCIE_APP_LTSSM_ENABLE 0x02c
-#define PCIE_ELBI_RDLH_LINKUP 0x064
-#define PCIE_ELBI_LTSSM_ENABLE 0x1
-#define PCIE_ELBI_SLV_AWMISC 0x11c
-#define PCIE_ELBI_SLV_ARMISC 0x120
-#define PCIE_ELBI_SLV_DBI_ENABLE (0x1 << 21)
-
-/* PCIe Purple registers */
-#define PCIE_PHY_GLOBAL_RESET 0x000
-#define PCIE_PHY_COMMON_RESET 0x004
-#define PCIE_PHY_CMN_REG 0x008
-#define PCIE_PHY_MAC_RESET 0x00c
-#define PCIE_PHY_PLL_LOCKED 0x010
-#define PCIE_PHY_TRSVREG_RESET 0x020
-#define PCIE_PHY_TRSV_RESET 0x024
-
-/* PCIe PHY registers */
-#define PCIE_PHY_IMPEDANCE 0x004
-#define PCIE_PHY_PLL_DIV_0 0x008
-#define PCIE_PHY_PLL_BIAS 0x00c
-#define PCIE_PHY_DCC_FEEDBACK 0x014
-#define PCIE_PHY_PLL_DIV_1 0x05c
-#define PCIE_PHY_TRSV0_EMP_LVL 0x084
-#define PCIE_PHY_TRSV0_DRV_LVL 0x088
-#define PCIE_PHY_TRSV0_RXCDR 0x0ac
-#define PCIE_PHY_TRSV0_LVCC 0x0dc
-#define PCIE_PHY_TRSV1_EMP_LVL 0x144
-#define PCIE_PHY_TRSV1_RXCDR 0x16c
-#define PCIE_PHY_TRSV1_LVCC 0x19c
-#define PCIE_PHY_TRSV2_EMP_LVL 0x204
-#define PCIE_PHY_TRSV2_RXCDR 0x22c
-#define PCIE_PHY_TRSV2_LVCC 0x25c
-#define PCIE_PHY_TRSV3_EMP_LVL 0x2c4
-#define PCIE_PHY_TRSV3_RXCDR 0x2ec
-#define PCIE_PHY_TRSV3_LVCC 0x31c
-
-static struct hw_pci exynos_pci;
+unsigned long global_io_offset;
static inline struct pcie_port *sys_to_pcie(struct pci_sys_data *sys)
{
return sys->private_data;
}
-static inline int cfg_read(void *addr, int where, int size, u32 *val)
+int cfg_read(void *addr, int where, int size, u32 *val)
{
*val = readl(addr);
@@ -184,7 +83,7 @@ static inline int cfg_read(void *addr, int where, int size, u32 *val)
return PCIBIOS_SUCCESSFUL;
}
-static inline int cfg_write(void *addr, int where, int size, u32 val)
+int cfg_write(void *addr, int where, int size, u32 val)
{
if (size == 4)
writel(val, addr);
@@ -198,155 +97,230 @@ static inline int cfg_write(void *addr, int where, int size, u32 val)
return PCIBIOS_SUCCESSFUL;
}
-static void exynos_pcie_sideband_dbi_w_mode(struct pcie_port *pp, bool on)
-{
- u32 val;
-
- if (on) {
- val = readl(pp->elbi_base + PCIE_ELBI_SLV_AWMISC);
- val |= PCIE_ELBI_SLV_DBI_ENABLE;
- writel(val, pp->elbi_base + PCIE_ELBI_SLV_AWMISC);
- } else {
- val = readl(pp->elbi_base + PCIE_ELBI_SLV_AWMISC);
- val &= ~PCIE_ELBI_SLV_DBI_ENABLE;
- writel(val, pp->elbi_base + PCIE_ELBI_SLV_AWMISC);
- }
-}
-
-static void exynos_pcie_sideband_dbi_r_mode(struct pcie_port *pp, bool on)
+static inline void dw_pcie_readl_rc(struct pcie_port *pp,
+ void __iomem *dbi_addr, u32 *val)
{
- u32 val;
-
- if (on) {
- val = readl(pp->elbi_base + PCIE_ELBI_SLV_ARMISC);
- val |= PCIE_ELBI_SLV_DBI_ENABLE;
- writel(val, pp->elbi_base + PCIE_ELBI_SLV_ARMISC);
- } else {
- val = readl(pp->elbi_base + PCIE_ELBI_SLV_ARMISC);
- val &= ~PCIE_ELBI_SLV_DBI_ENABLE;
- writel(val, pp->elbi_base + PCIE_ELBI_SLV_ARMISC);
- }
-}
-
-static inline void readl_rc(struct pcie_port *pp, void *dbi_base, u32 *val)
-{
- exynos_pcie_sideband_dbi_r_mode(pp, true);
- *val = readl(dbi_base);
- exynos_pcie_sideband_dbi_r_mode(pp, false);
- return;
+ if (pp->ops->readl_rc)
+ pp->ops->readl_rc(pp, dbi_addr, val);
+ else
+ *val = readl(dbi_addr);
}
-static inline void writel_rc(struct pcie_port *pp, u32 val, void *dbi_base)
+static inline void dw_pcie_writel_rc(struct pcie_port *pp,
+ u32 val, void __iomem *dbi_addr)
{
- exynos_pcie_sideband_dbi_w_mode(pp, true);
- writel(val, dbi_base);
- exynos_pcie_sideband_dbi_w_mode(pp, false);
- return;
+ if (pp->ops->writel_rc)
+ pp->ops->writel_rc(pp, val, dbi_addr);
+ else
+ writel(val, dbi_addr);
}
-static int exynos_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
+int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
u32 *val)
{
int ret;
- exynos_pcie_sideband_dbi_r_mode(pp, true);
- ret = cfg_read(pp->dbi_base + (where & ~0x3), where, size, val);
- exynos_pcie_sideband_dbi_r_mode(pp, false);
+ if (pp->ops->rd_own_conf)
+ ret = pp->ops->rd_own_conf(pp, where, size, val);
+ else
+ ret = cfg_read(pp->dbi_base + (where & ~0x3), where, size, val);
+
return ret;
}
-static int exynos_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
+int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
u32 val)
{
int ret;
- exynos_pcie_sideband_dbi_w_mode(pp, true);
- ret = cfg_write(pp->dbi_base + (where & ~0x3), where, size, val);
- exynos_pcie_sideband_dbi_w_mode(pp, false);
+ if (pp->ops->wr_own_conf)
+ ret = pp->ops->wr_own_conf(pp, where, size, val);
+ else
+ ret = cfg_write(pp->dbi_base + (where & ~0x3), where, size,
+ val);
+
return ret;
}
-static void exynos_pcie_prog_viewport_cfg0(struct pcie_port *pp, u32 busdev)
+int dw_pcie_link_up(struct pcie_port *pp)
+{
+ if (pp->ops->link_up)
+ return pp->ops->link_up(pp);
+ else
+ return 0;
+}
+
+int dw_pcie_host_init(struct pcie_port *pp)
+{
+ struct device_node *np = pp->dev->of_node;
+ struct of_pci_range range;
+ struct of_pci_range_parser parser;
+ u32 val;
+
+ if (of_pci_range_parser_init(&parser, np)) {
+ dev_err(pp->dev, "missing ranges property\n");
+ return -EINVAL;
+ }
+
+ /* Get the I/O and memory ranges from DT */
+ for_each_of_pci_range(&parser, &range) {
+ unsigned long restype = range.flags & IORESOURCE_TYPE_BITS;
+ if (restype == IORESOURCE_IO) {
+ of_pci_range_to_resource(&range, np, &pp->io);
+ pp->io.name = "I/O";
+ pp->io.start = max_t(resource_size_t,
+ PCIBIOS_MIN_IO,
+ range.pci_addr + global_io_offset);
+ pp->io.end = min_t(resource_size_t,
+ IO_SPACE_LIMIT,
+ range.pci_addr + range.size
+ + global_io_offset);
+ pp->config.io_size = resource_size(&pp->io);
+ pp->config.io_bus_addr = range.pci_addr;
+ }
+ if (restype == IORESOURCE_MEM) {
+ of_pci_range_to_resource(&range, np, &pp->mem);
+ pp->mem.name = "MEM";
+ pp->config.mem_size = resource_size(&pp->mem);
+ pp->config.mem_bus_addr = range.pci_addr;
+ }
+ if (restype == 0) {
+ of_pci_range_to_resource(&range, np, &pp->cfg);
+ pp->config.cfg0_size = resource_size(&pp->cfg)/2;
+ pp->config.cfg1_size = resource_size(&pp->cfg)/2;
+ }
+ }
+
+ pp->dbi_base = devm_ioremap(pp->dev, pp->cfg.start,
+ resource_size(&pp->cfg));
+ if (!pp->dbi_base) {
+ dev_err(pp->dev, "error with ioremap\n");
+ return -ENOMEM;
+ }
+
+ pp->cfg0_base = pp->cfg.start;
+ pp->cfg1_base = pp->cfg.start + pp->config.cfg0_size;
+ pp->io_base = pp->io.start;
+ pp->mem_base = pp->mem.start;
+
+ pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base,
+ pp->config.cfg0_size);
+ if (!pp->va_cfg0_base) {
+ dev_err(pp->dev, "error with ioremap in function\n");
+ return -ENOMEM;
+ }
+ pp->va_cfg1_base = devm_ioremap(pp->dev, pp->cfg1_base,
+ pp->config.cfg1_size);
+ if (!pp->va_cfg1_base) {
+ dev_err(pp->dev, "error with ioremap\n");
+ return -ENOMEM;
+ }
+
+ if (of_property_read_u32(np, "num-lanes", &pp->lanes)) {
+ dev_err(pp->dev, "Failed to parse the number of lanes\n");
+ return -EINVAL;
+ }
+
+ if (pp->ops->host_init)
+ pp->ops->host_init(pp);
+
+ dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
+
+ /* program correct class for RC */
+ dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI);
+
+ dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val);
+ val |= PORT_LOGIC_SPEED_CHANGE;
+ dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
+
+ return 0;
+}
+
+static void dw_pcie_prog_viewport_cfg0(struct pcie_port *pp, u32 busdev)
{
u32 val;
void __iomem *dbi_base = pp->dbi_base;
/* Program viewport 0 : OUTBOUND : CFG0 */
val = PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0;
- writel_rc(pp, val, dbi_base + PCIE_ATU_VIEWPORT);
- writel_rc(pp, pp->cfg0_base, dbi_base + PCIE_ATU_LOWER_BASE);
- writel_rc(pp, (pp->cfg0_base >> 32), dbi_base + PCIE_ATU_UPPER_BASE);
- writel_rc(pp, pp->cfg0_base + pp->config.cfg0_size - 1,
+ dw_pcie_writel_rc(pp, val, dbi_base + PCIE_ATU_VIEWPORT);
+ dw_pcie_writel_rc(pp, pp->cfg0_base, dbi_base + PCIE_ATU_LOWER_BASE);
+ dw_pcie_writel_rc(pp, (pp->cfg0_base >> 32),
+ dbi_base + PCIE_ATU_UPPER_BASE);
+ dw_pcie_writel_rc(pp, pp->cfg0_base + pp->config.cfg0_size - 1,
dbi_base + PCIE_ATU_LIMIT);
- writel_rc(pp, busdev, dbi_base + PCIE_ATU_LOWER_TARGET);
- writel_rc(pp, 0, dbi_base + PCIE_ATU_UPPER_TARGET);
- writel_rc(pp, PCIE_ATU_TYPE_CFG0, dbi_base + PCIE_ATU_CR1);
+ dw_pcie_writel_rc(pp, busdev, dbi_base + PCIE_ATU_LOWER_TARGET);
+ dw_pcie_writel_rc(pp, 0, dbi_base + PCIE_ATU_UPPER_TARGET);
+ dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_CFG0, dbi_base + PCIE_ATU_CR1);
val = PCIE_ATU_ENABLE;
- writel_rc(pp, val, dbi_base + PCIE_ATU_CR2);
+ dw_pcie_writel_rc(pp, val, dbi_base + PCIE_ATU_CR2);
}
-static void exynos_pcie_prog_viewport_cfg1(struct pcie_port *pp, u32 busdev)
+static void dw_pcie_prog_viewport_cfg1(struct pcie_port *pp, u32 busdev)
{
u32 val;
void __iomem *dbi_base = pp->dbi_base;
/* Program viewport 1 : OUTBOUND : CFG1 */
val = PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1;
- writel_rc(pp, val, dbi_base + PCIE_ATU_VIEWPORT);
- writel_rc(pp, PCIE_ATU_TYPE_CFG1, dbi_base + PCIE_ATU_CR1);
+ dw_pcie_writel_rc(pp, val, dbi_base + PCIE_ATU_VIEWPORT);
+ dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_CFG1, dbi_base + PCIE_ATU_CR1);
val = PCIE_ATU_ENABLE;
- writel_rc(pp, val, dbi_base + PCIE_ATU_CR2);
- writel_rc(pp, pp->cfg1_base, dbi_base + PCIE_ATU_LOWER_BASE);
- writel_rc(pp, (pp->cfg1_base >> 32), dbi_base + PCIE_ATU_UPPER_BASE);
- writel_rc(pp, pp->cfg1_base + pp->config.cfg1_size - 1,
+ dw_pcie_writel_rc(pp, val, dbi_base + PCIE_ATU_CR2);
+ dw_pcie_writel_rc(pp, pp->cfg1_base, dbi_base + PCIE_ATU_LOWER_BASE);
+ dw_pcie_writel_rc(pp, (pp->cfg1_base >> 32),
+ dbi_base + PCIE_ATU_UPPER_BASE);
+ dw_pcie_writel_rc(pp, pp->cfg1_base + pp->config.cfg1_size - 1,
dbi_base + PCIE_ATU_LIMIT);
- writel_rc(pp, busdev, dbi_base + PCIE_ATU_LOWER_TARGET);
- writel_rc(pp, 0, dbi_base + PCIE_ATU_UPPER_TARGET);
+ dw_pcie_writel_rc(pp, busdev, dbi_base + PCIE_ATU_LOWER_TARGET);
+ dw_pcie_writel_rc(pp, 0, dbi_base + PCIE_ATU_UPPER_TARGET);
}
-static void exynos_pcie_prog_viewport_mem_outbound(struct pcie_port *pp)
+static void dw_pcie_prog_viewport_mem_outbound(struct pcie_port *pp)
{
u32 val;
void __iomem *dbi_base = pp->dbi_base;
/* Program viewport 0 : OUTBOUND : MEM */
val = PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0;
- writel_rc(pp, val, dbi_base + PCIE_ATU_VIEWPORT);
- writel_rc(pp, PCIE_ATU_TYPE_MEM, dbi_base + PCIE_ATU_CR1);
+ dw_pcie_writel_rc(pp, val, dbi_base + PCIE_ATU_VIEWPORT);
+ dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_MEM, dbi_base + PCIE_ATU_CR1);
val = PCIE_ATU_ENABLE;
- writel_rc(pp, val, dbi_base + PCIE_ATU_CR2);
- writel_rc(pp, pp->mem_base, dbi_base + PCIE_ATU_LOWER_BASE);
- writel_rc(pp, (pp->mem_base >> 32), dbi_base + PCIE_ATU_UPPER_BASE);
- writel_rc(pp, pp->mem_base + pp->config.mem_size - 1,
+ dw_pcie_writel_rc(pp, val, dbi_base + PCIE_ATU_CR2);
+ dw_pcie_writel_rc(pp, pp->mem_base, dbi_base + PCIE_ATU_LOWER_BASE);
+ dw_pcie_writel_rc(pp, (pp->mem_base >> 32),
+ dbi_base + PCIE_ATU_UPPER_BASE);
+ dw_pcie_writel_rc(pp, pp->mem_base + pp->config.mem_size - 1,
dbi_base + PCIE_ATU_LIMIT);
- writel_rc(pp, pp->config.mem_bus_addr,
+ dw_pcie_writel_rc(pp, pp->config.mem_bus_addr,
dbi_base + PCIE_ATU_LOWER_TARGET);
- writel_rc(pp, upper_32_bits(pp->config.mem_bus_addr),
+ dw_pcie_writel_rc(pp, upper_32_bits(pp->config.mem_bus_addr),
dbi_base + PCIE_ATU_UPPER_TARGET);
}
-static void exynos_pcie_prog_viewport_io_outbound(struct pcie_port *pp)
+static void dw_pcie_prog_viewport_io_outbound(struct pcie_port *pp)
{
u32 val;
void __iomem *dbi_base = pp->dbi_base;
/* Program viewport 1 : OUTBOUND : IO */
val = PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1;
- writel_rc(pp, val, dbi_base + PCIE_ATU_VIEWPORT);
- writel_rc(pp, PCIE_ATU_TYPE_IO, dbi_base + PCIE_ATU_CR1);
+ dw_pcie_writel_rc(pp, val, dbi_base + PCIE_ATU_VIEWPORT);
+ dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_IO, dbi_base + PCIE_ATU_CR1);
val = PCIE_ATU_ENABLE;
- writel_rc(pp, val, dbi_base + PCIE_ATU_CR2);
- writel_rc(pp, pp->io_base, dbi_base + PCIE_ATU_LOWER_BASE);
- writel_rc(pp, (pp->io_base >> 32), dbi_base + PCIE_ATU_UPPER_BASE);
- writel_rc(pp, pp->io_base + pp->config.io_size - 1,
+ dw_pcie_writel_rc(pp, val, dbi_base + PCIE_ATU_CR2);
+ dw_pcie_writel_rc(pp, pp->io_base, dbi_base + PCIE_ATU_LOWER_BASE);
+ dw_pcie_writel_rc(pp, (pp->io_base >> 32),
+ dbi_base + PCIE_ATU_UPPER_BASE);
+ dw_pcie_writel_rc(pp, pp->io_base + pp->config.io_size - 1,
dbi_base + PCIE_ATU_LIMIT);
- writel_rc(pp, pp->config.io_bus_addr,
+ dw_pcie_writel_rc(pp, pp->config.io_bus_addr,
dbi_base + PCIE_ATU_LOWER_TARGET);
- writel_rc(pp, upper_32_bits(pp->config.io_bus_addr),
+ dw_pcie_writel_rc(pp, upper_32_bits(pp->config.io_bus_addr),
dbi_base + PCIE_ATU_UPPER_TARGET);
}
-static int exynos_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
+static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u32 devfn, int where, int size, u32 *val)
{
int ret = PCIBIOS_SUCCESSFUL;
@@ -357,19 +331,19 @@ static int exynos_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
address = where & ~0x3;
if (bus->parent->number == pp->root_bus_nr) {
- exynos_pcie_prog_viewport_cfg0(pp, busdev);
+ dw_pcie_prog_viewport_cfg0(pp, busdev);
ret = cfg_read(pp->va_cfg0_base + address, where, size, val);
- exynos_pcie_prog_viewport_mem_outbound(pp);
+ dw_pcie_prog_viewport_mem_outbound(pp);
} else {
- exynos_pcie_prog_viewport_cfg1(pp, busdev);
+ dw_pcie_prog_viewport_cfg1(pp, busdev);
ret = cfg_read(pp->va_cfg1_base + address, where, size, val);
- exynos_pcie_prog_viewport_io_outbound(pp);
+ dw_pcie_prog_viewport_io_outbound(pp);
}
return ret;
}
-static int exynos_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
+static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u32 devfn, int where, int size, u32 val)
{
int ret = PCIBIOS_SUCCESSFUL;
@@ -380,59 +354,25 @@ static int exynos_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
address = where & ~0x3;
if (bus->parent->number == pp->root_bus_nr) {
- exynos_pcie_prog_viewport_cfg0(pp, busdev);
+ dw_pcie_prog_viewport_cfg0(pp, busdev);
ret = cfg_write(pp->va_cfg0_base + address, where, size, val);
- exynos_pcie_prog_viewport_mem_outbound(pp);
+ dw_pcie_prog_viewport_mem_outbound(pp);
} else {
- exynos_pcie_prog_viewport_cfg1(pp, busdev);
+ dw_pcie_prog_viewport_cfg1(pp, busdev);
ret = cfg_write(pp->va_cfg1_base + address, where, size, val);
- exynos_pcie_prog_viewport_io_outbound(pp);
+ dw_pcie_prog_viewport_io_outbound(pp);
}
return ret;
}
-static unsigned long global_io_offset;
-
-static int exynos_pcie_setup(int nr, struct pci_sys_data *sys)
-{
- struct pcie_port *pp;
-
- pp = sys_to_pcie(sys);
-
- if (!pp)
- return 0;
-
- if (global_io_offset < SZ_1M && pp->config.io_size > 0) {
- sys->io_offset = global_io_offset - pp->config.io_bus_addr;
- pci_ioremap_io(sys->io_offset, pp->io.start);
- global_io_offset += SZ_64K;
- pci_add_resource_offset(&sys->resources, &pp->io,
- sys->io_offset);
- }
-
- sys->mem_offset = pp->mem.start - pp->config.mem_bus_addr;
- pci_add_resource_offset(&sys->resources, &pp->mem, sys->mem_offset);
-
- return 1;
-}
-
-static int exynos_pcie_link_up(struct pcie_port *pp)
-{
- u32 val = readl(pp->elbi_base + PCIE_ELBI_RDLH_LINKUP);
-
- if (val == PCIE_ELBI_LTSSM_ENABLE)
- return 1;
- return 0;
-}
-
-static int exynos_pcie_valid_config(struct pcie_port *pp,
+static int dw_pcie_valid_config(struct pcie_port *pp,
struct pci_bus *bus, int dev)
{
/* If there is no link, then there is no device */
if (bus->number != pp->root_bus_nr) {
- if (!exynos_pcie_link_up(pp))
+ if (!dw_pcie_link_up(pp))
return 0;
}
@@ -450,7 +390,7 @@ static int exynos_pcie_valid_config(struct pcie_port *pp,
return 1;
}
-static int exynos_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
+static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
int size, u32 *val)
{
struct pcie_port *pp = sys_to_pcie(bus->sysdata);
@@ -462,23 +402,23 @@ static int exynos_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
return -EINVAL;
}
- if (exynos_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) {
+ if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) {
*val = 0xffffffff;
return PCIBIOS_DEVICE_NOT_FOUND;
}
spin_lock_irqsave(&pp->conf_lock, flags);
if (bus->number != pp->root_bus_nr)
- ret = exynos_pcie_rd_other_conf(pp, bus, devfn,
+ ret = dw_pcie_rd_other_conf(pp, bus, devfn,
where, size, val);
else
- ret = exynos_pcie_rd_own_conf(pp, where, size, val);
+ ret = dw_pcie_rd_own_conf(pp, where, size, val);
spin_unlock_irqrestore(&pp->conf_lock, flags);
return ret;
}
-static int exynos_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
+static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
int where, int size, u32 val)
{
struct pcie_port *pp = sys_to_pcie(bus->sysdata);
@@ -490,34 +430,56 @@ static int exynos_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
return -EINVAL;
}
- if (exynos_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0)
+ if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0)
return PCIBIOS_DEVICE_NOT_FOUND;
spin_lock_irqsave(&pp->conf_lock, flags);
if (bus->number != pp->root_bus_nr)
- ret = exynos_pcie_wr_other_conf(pp, bus, devfn,
+ ret = dw_pcie_wr_other_conf(pp, bus, devfn,
where, size, val);
else
- ret = exynos_pcie_wr_own_conf(pp, where, size, val);
+ ret = dw_pcie_wr_own_conf(pp, where, size, val);
spin_unlock_irqrestore(&pp->conf_lock, flags);
return ret;
}
-static struct pci_ops exynos_pcie_ops = {
- .read = exynos_pcie_rd_conf,
- .write = exynos_pcie_wr_conf,
+static struct pci_ops dw_pcie_ops = {
+ .read = dw_pcie_rd_conf,
+ .write = dw_pcie_wr_conf,
};
-static struct pci_bus *exynos_pcie_scan_bus(int nr,
- struct pci_sys_data *sys)
+int dw_pcie_setup(int nr, struct pci_sys_data *sys)
+{
+ struct pcie_port *pp;
+
+ pp = sys_to_pcie(sys);
+
+ if (!pp)
+ return 0;
+
+ if (global_io_offset < SZ_1M && pp->config.io_size > 0) {
+ sys->io_offset = global_io_offset - pp->config.io_bus_addr;
+ pci_ioremap_io(sys->io_offset, pp->io.start);
+ global_io_offset += SZ_64K;
+ pci_add_resource_offset(&sys->resources, &pp->io,
+ sys->io_offset);
+ }
+
+ sys->mem_offset = pp->mem.start - pp->config.mem_bus_addr;
+ pci_add_resource_offset(&sys->resources, &pp->mem, sys->mem_offset);
+
+ return 1;
+}
+
+struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys)
{
struct pci_bus *bus;
struct pcie_port *pp = sys_to_pcie(sys);
if (pp) {
pp->root_bus_nr = sys->busnr;
- bus = pci_scan_root_bus(NULL, sys->busnr, &exynos_pcie_ops,
+ bus = pci_scan_root_bus(NULL, sys->busnr, &dw_pcie_ops,
sys, &sys->resources);
} else {
bus = NULL;
@@ -527,20 +489,20 @@ static struct pci_bus *exynos_pcie_scan_bus(int nr,
return bus;
}
-static int exynos_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct pcie_port *pp = sys_to_pcie(dev->bus->sysdata);
return pp->irq;
}
-static struct hw_pci exynos_pci = {
- .setup = exynos_pcie_setup,
- .scan = exynos_pcie_scan_bus,
- .map_irq = exynos_pcie_map_irq,
+struct hw_pci dw_pci = {
+ .setup = dw_pcie_setup,
+ .scan = dw_pcie_scan_bus,
+ .map_irq = dw_pcie_map_irq,
};
-static void exynos_pcie_setup_rc(struct pcie_port *pp)
+void dw_pcie_setup_rc(struct pcie_port *pp)
{
struct pcie_port_info *config = &pp->config;
void __iomem *dbi_base = pp->dbi_base;
@@ -549,509 +511,67 @@ static void exynos_pcie_setup_rc(struct pcie_port *pp)
u32 memlimit;
/* set the number of lines as 4 */
- readl_rc(pp, dbi_base + PCIE_PORT_LINK_CONTROL, &val);
+ dw_pcie_readl_rc(pp, dbi_base + PCIE_PORT_LINK_CONTROL, &val);
val &= ~PORT_LINK_MODE_MASK;
- val |= PORT_LINK_MODE_4_LANES;
- writel_rc(pp, val, dbi_base + PCIE_PORT_LINK_CONTROL);
+ switch (pp->lanes) {
+ case 1:
+ val |= PORT_LINK_MODE_1_LANES;
+ break;
+ case 2:
+ val |= PORT_LINK_MODE_2_LANES;
+ break;
+ case 4:
+ val |= PORT_LINK_MODE_4_LANES;
+ break;
+ }
+ dw_pcie_writel_rc(pp, val, dbi_base + PCIE_PORT_LINK_CONTROL);
/* set link width speed control register */
- readl_rc(pp, dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL, &val);
+ dw_pcie_readl_rc(pp, dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL, &val);
val &= ~PORT_LOGIC_LINK_WIDTH_MASK;
- val |= PORT_LOGIC_LINK_WIDTH_4_LANES;
- writel_rc(pp, val, dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL);
+ switch (pp->lanes) {
+ case 1:
+ val |= PORT_LOGIC_LINK_WIDTH_1_LANES;
+ break;
+ case 2:
+ val |= PORT_LOGIC_LINK_WIDTH_2_LANES;
+ break;
+ case 4:
+ val |= PORT_LOGIC_LINK_WIDTH_4_LANES;
+ break;
+ }
+ dw_pcie_writel_rc(pp, val, dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL);
/* setup RC BARs */
- writel_rc(pp, 0x00000004, dbi_base + PCI_BASE_ADDRESS_0);
- writel_rc(pp, 0x00000004, dbi_base + PCI_BASE_ADDRESS_1);
+ dw_pcie_writel_rc(pp, 0x00000004, dbi_base + PCI_BASE_ADDRESS_0);
+ dw_pcie_writel_rc(pp, 0x00000004, dbi_base + PCI_BASE_ADDRESS_1);
/* setup interrupt pins */
- readl_rc(pp, dbi_base + PCI_INTERRUPT_LINE, &val);
+ dw_pcie_readl_rc(pp, dbi_base + PCI_INTERRUPT_LINE, &val);
val &= 0xffff00ff;
val |= 0x00000100;
- writel_rc(pp, val, dbi_base + PCI_INTERRUPT_LINE);
+ dw_pcie_writel_rc(pp, val, dbi_base + PCI_INTERRUPT_LINE);
/* setup bus numbers */
- readl_rc(pp, dbi_base + PCI_PRIMARY_BUS, &val);
+ dw_pcie_readl_rc(pp, dbi_base + PCI_PRIMARY_BUS, &val);
val &= 0xff000000;
val |= 0x00010100;
- writel_rc(pp, val, dbi_base + PCI_PRIMARY_BUS);
+ dw_pcie_writel_rc(pp, val, dbi_base + PCI_PRIMARY_BUS);
/* setup memory base, memory limit */
membase = ((u32)pp->mem_base & 0xfff00000) >> 16;
memlimit = (config->mem_size + (u32)pp->mem_base) & 0xfff00000;
val = memlimit | membase;
- writel_rc(pp, val, dbi_base + PCI_MEMORY_BASE);
+ dw_pcie_writel_rc(pp, val, dbi_base + PCI_MEMORY_BASE);
/* setup command register */
- readl_rc(pp, dbi_base + PCI_COMMAND, &val);
+ dw_pcie_readl_rc(pp, dbi_base + PCI_COMMAND, &val);
val &= 0xffff0000;
val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
- writel_rc(pp, val, dbi_base + PCI_COMMAND);
-}
-
-static void exynos_pcie_assert_core_reset(struct pcie_port *pp)
-{
- u32 val;
- void __iomem *elbi_base = pp->elbi_base;
-
- val = readl(elbi_base + PCIE_CORE_RESET);
- val &= ~PCIE_CORE_RESET_ENABLE;
- writel(val, elbi_base + PCIE_CORE_RESET);
- writel(0, elbi_base + PCIE_PWR_RESET);
- writel(0, elbi_base + PCIE_STICKY_RESET);
- writel(0, elbi_base + PCIE_NONSTICKY_RESET);
-}
-
-static void exynos_pcie_deassert_core_reset(struct pcie_port *pp)
-{
- u32 val;
- void __iomem *elbi_base = pp->elbi_base;
- void __iomem *purple_base = pp->purple_base;
-
- val = readl(elbi_base + PCIE_CORE_RESET);
- val |= PCIE_CORE_RESET_ENABLE;
- writel(val, elbi_base + PCIE_CORE_RESET);
- writel(1, elbi_base + PCIE_STICKY_RESET);
- writel(1, elbi_base + PCIE_NONSTICKY_RESET);
- writel(1, elbi_base + PCIE_APP_INIT_RESET);
- writel(0, elbi_base + PCIE_APP_INIT_RESET);
- writel(1, purple_base + PCIE_PHY_MAC_RESET);
-}
-
-static void exynos_pcie_assert_phy_reset(struct pcie_port *pp)
-{
- void __iomem *purple_base = pp->purple_base;
-
- writel(0, purple_base + PCIE_PHY_MAC_RESET);
- writel(1, purple_base + PCIE_PHY_GLOBAL_RESET);
-}
-
-static void exynos_pcie_deassert_phy_reset(struct pcie_port *pp)
-{
- void __iomem *elbi_base = pp->elbi_base;
- void __iomem *purple_base = pp->purple_base;
-
- writel(0, purple_base + PCIE_PHY_GLOBAL_RESET);
- writel(1, elbi_base + PCIE_PWR_RESET);
- writel(0, purple_base + PCIE_PHY_COMMON_RESET);
- writel(0, purple_base + PCIE_PHY_CMN_REG);
- writel(0, purple_base + PCIE_PHY_TRSVREG_RESET);
- writel(0, purple_base + PCIE_PHY_TRSV_RESET);
-}
-
-static void exynos_pcie_init_phy(struct pcie_port *pp)
-{
- void __iomem *phy_base = pp->phy_base;
-
- /* DCC feedback control off */
- writel(0x29, phy_base + PCIE_PHY_DCC_FEEDBACK);
-
- /* set TX/RX impedance */
- writel(0xd5, phy_base + PCIE_PHY_IMPEDANCE);
-
- /* set 50Mhz PHY clock */
- writel(0x14, phy_base + PCIE_PHY_PLL_DIV_0);
- writel(0x12, phy_base + PCIE_PHY_PLL_DIV_1);
-
- /* set TX Differential output for lane 0 */
- writel(0x7f, phy_base + PCIE_PHY_TRSV0_DRV_LVL);
-
- /* set TX Pre-emphasis Level Control for lane 0 to minimum */
- writel(0x0, phy_base + PCIE_PHY_TRSV0_EMP_LVL);
-
- /* set RX clock and data recovery bandwidth */
- writel(0xe7, phy_base + PCIE_PHY_PLL_BIAS);
- writel(0x82, phy_base + PCIE_PHY_TRSV0_RXCDR);
- writel(0x82, phy_base + PCIE_PHY_TRSV1_RXCDR);
- writel(0x82, phy_base + PCIE_PHY_TRSV2_RXCDR);
- writel(0x82, phy_base + PCIE_PHY_TRSV3_RXCDR);
-
- /* change TX Pre-emphasis Level Control for lanes */
- writel(0x39, phy_base + PCIE_PHY_TRSV0_EMP_LVL);
- writel(0x39, phy_base + PCIE_PHY_TRSV1_EMP_LVL);
- writel(0x39, phy_base + PCIE_PHY_TRSV2_EMP_LVL);
- writel(0x39, phy_base + PCIE_PHY_TRSV3_EMP_LVL);
-
- /* set LVCC */
- writel(0x20, phy_base + PCIE_PHY_TRSV0_LVCC);
- writel(0xa0, phy_base + PCIE_PHY_TRSV1_LVCC);
- writel(0xa0, phy_base + PCIE_PHY_TRSV2_LVCC);
- writel(0xa0, phy_base + PCIE_PHY_TRSV3_LVCC);
-}
-
-static void exynos_pcie_assert_reset(struct pcie_port *pp)
-{
- if (pp->reset_gpio >= 0)
- devm_gpio_request_one(pp->dev, pp->reset_gpio,
- GPIOF_OUT_INIT_HIGH, "RESET");
- return;
-}
-
-static int exynos_pcie_establish_link(struct pcie_port *pp)
-{
- u32 val;
- int count = 0;
- void __iomem *elbi_base = pp->elbi_base;
- void __iomem *purple_base = pp->purple_base;
- void __iomem *phy_base = pp->phy_base;
-
- if (exynos_pcie_link_up(pp)) {
- dev_err(pp->dev, "Link already up\n");
- return 0;
- }
-
- /* assert reset signals */
- exynos_pcie_assert_core_reset(pp);
- exynos_pcie_assert_phy_reset(pp);
-
- /* de-assert phy reset */
- exynos_pcie_deassert_phy_reset(pp);
-
- /* initialize phy */
- exynos_pcie_init_phy(pp);
-
- /* pulse for common reset */
- writel(1, purple_base + PCIE_PHY_COMMON_RESET);
- udelay(500);
- writel(0, purple_base + PCIE_PHY_COMMON_RESET);
-
- /* de-assert core reset */
- exynos_pcie_deassert_core_reset(pp);
-
- /* setup root complex */
- exynos_pcie_setup_rc(pp);
-
- /* assert reset signal */
- exynos_pcie_assert_reset(pp);
-
- /* assert LTSSM enable */
- writel(PCIE_ELBI_LTSSM_ENABLE, elbi_base + PCIE_APP_LTSSM_ENABLE);
-
- /* check if the link is up or not */
- while (!exynos_pcie_link_up(pp)) {
- mdelay(100);
- count++;
- if (count == 10) {
- while (readl(phy_base + PCIE_PHY_PLL_LOCKED) == 0) {
- val = readl(purple_base + PCIE_PHY_PLL_LOCKED);
- dev_info(pp->dev, "PLL Locked: 0x%x\n", val);
- }
- dev_err(pp->dev, "PCIe Link Fail\n");
- return -EINVAL;
- }
- }
-
- dev_info(pp->dev, "Link up\n");
-
- return 0;
-}
-
-static void exynos_pcie_clear_irq_pulse(struct pcie_port *pp)
-{
- u32 val;
- void __iomem *elbi_base = pp->elbi_base;
-
- val = readl(elbi_base + PCIE_IRQ_PULSE);
- writel(val, elbi_base + PCIE_IRQ_PULSE);
- return;
-}
-
-static void exynos_pcie_enable_irq_pulse(struct pcie_port *pp)
-{
- u32 val;
- void __iomem *elbi_base = pp->elbi_base;
-
- /* enable INTX interrupt */
- val = IRQ_INTA_ASSERT | IRQ_INTB_ASSERT |
- IRQ_INTC_ASSERT | IRQ_INTD_ASSERT,
- writel(val, elbi_base + PCIE_IRQ_EN_PULSE);
- return;
-}
-
-static irqreturn_t exynos_pcie_irq_handler(int irq, void *arg)
-{
- struct pcie_port *pp = arg;
-
- exynos_pcie_clear_irq_pulse(pp);
- return IRQ_HANDLED;
-}
-
-static void exynos_pcie_enable_interrupts(struct pcie_port *pp)
-{
- exynos_pcie_enable_irq_pulse(pp);
- return;
-}
-
-static void exynos_pcie_host_init(struct pcie_port *pp)
-{
- struct pcie_port_info *config = &pp->config;
- u32 val;
-
- /* Keep first 64K for IO */
- pp->cfg0_base = pp->cfg.start;
- pp->cfg1_base = pp->cfg.start + config->cfg0_size;
- pp->io_base = pp->io.start;
- pp->mem_base = pp->mem.start;
-
- /* enable link */
- exynos_pcie_establish_link(pp);
-
- exynos_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
-
- /* program correct class for RC */
- exynos_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI);
-
- exynos_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val);
- val |= PORT_LOGIC_SPEED_CHANGE;
- exynos_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
-
- exynos_pcie_enable_interrupts(pp);
-}
-
-static int add_pcie_port(struct pcie_port *pp, struct platform_device *pdev)
-{
- struct resource *elbi_base;
- struct resource *phy_base;
- struct resource *purple_base;
- int ret;
-
- elbi_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!elbi_base) {
- dev_err(&pdev->dev, "couldn't get elbi base resource\n");
- return -EINVAL;
- }
- pp->elbi_base = devm_ioremap_resource(&pdev->dev, elbi_base);
- if (IS_ERR(pp->elbi_base))
- return PTR_ERR(pp->elbi_base);
-
- phy_base = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (!phy_base) {
- dev_err(&pdev->dev, "couldn't get phy base resource\n");
- return -EINVAL;
- }
- pp->phy_base = devm_ioremap_resource(&pdev->dev, phy_base);
- if (IS_ERR(pp->phy_base))
- return PTR_ERR(pp->phy_base);
-
- purple_base = platform_get_resource(pdev, IORESOURCE_MEM, 2);
- if (!purple_base) {
- dev_err(&pdev->dev, "couldn't get purple base resource\n");
- return -EINVAL;
- }
- pp->purple_base = devm_ioremap_resource(&pdev->dev, purple_base);
- if (IS_ERR(pp->purple_base))
- return PTR_ERR(pp->purple_base);
-
- pp->irq = platform_get_irq(pdev, 1);
- if (!pp->irq) {
- dev_err(&pdev->dev, "failed to get irq\n");
- return -ENODEV;
- }
- ret = devm_request_irq(&pdev->dev, pp->irq, exynos_pcie_irq_handler,
- IRQF_SHARED, "exynos-pcie", pp);
- if (ret) {
- dev_err(&pdev->dev, "failed to request irq\n");
- return ret;
- }
-
- pp->dbi_base = devm_ioremap(&pdev->dev, pp->cfg.start,
- resource_size(&pp->cfg));
- if (!pp->dbi_base) {
- dev_err(&pdev->dev, "error with ioremap\n");
- return -ENOMEM;
- }
-
- pp->root_bus_nr = -1;
-
- spin_lock_init(&pp->conf_lock);
- exynos_pcie_host_init(pp);
- pp->va_cfg0_base = devm_ioremap(&pdev->dev, pp->cfg0_base,
- pp->config.cfg0_size);
- if (!pp->va_cfg0_base) {
- dev_err(pp->dev, "error with ioremap in function\n");
- return -ENOMEM;
- }
- pp->va_cfg1_base = devm_ioremap(&pdev->dev, pp->cfg1_base,
- pp->config.cfg1_size);
- if (!pp->va_cfg1_base) {
- dev_err(pp->dev, "error with ioremap\n");
- return -ENOMEM;
- }
-
- return 0;
-}
-
-static int __init exynos_pcie_probe(struct platform_device *pdev)
-{
- struct pcie_port *pp;
- struct device_node *np = pdev->dev.of_node;
- struct of_pci_range range;
- struct of_pci_range_parser parser;
- int ret;
-
- pp = devm_kzalloc(&pdev->dev, sizeof(*pp), GFP_KERNEL);
- if (!pp) {
- dev_err(&pdev->dev, "no memory for pcie port\n");
- return -ENOMEM;
- }
-
- pp->dev = &pdev->dev;
-
- if (of_pci_range_parser_init(&parser, np)) {
- dev_err(&pdev->dev, "missing ranges property\n");
- return -EINVAL;
- }
-
- /* Get the I/O and memory ranges from DT */
- for_each_of_pci_range(&parser, &range) {
- unsigned long restype = range.flags & IORESOURCE_TYPE_BITS;
- if (restype == IORESOURCE_IO) {
- of_pci_range_to_resource(&range, np, &pp->io);
- pp->io.name = "I/O";
- pp->io.start = max_t(resource_size_t,
- PCIBIOS_MIN_IO,
- range.pci_addr + global_io_offset);
- pp->io.end = min_t(resource_size_t,
- IO_SPACE_LIMIT,
- range.pci_addr + range.size
- + global_io_offset);
- pp->config.io_size = resource_size(&pp->io);
- pp->config.io_bus_addr = range.pci_addr;
- }
- if (restype == IORESOURCE_MEM) {
- of_pci_range_to_resource(&range, np, &pp->mem);
- pp->mem.name = "MEM";
- pp->config.mem_size = resource_size(&pp->mem);
- pp->config.mem_bus_addr = range.pci_addr;
- }
- if (restype == 0) {
- of_pci_range_to_resource(&range, np, &pp->cfg);
- pp->config.cfg0_size = resource_size(&pp->cfg)/2;
- pp->config.cfg1_size = resource_size(&pp->cfg)/2;
- }
- }
-
- pp->reset_gpio = of_get_named_gpio(np, "reset-gpio", 0);
-
- pp->clk = devm_clk_get(&pdev->dev, "pcie");
- if (IS_ERR(pp->clk)) {
- dev_err(&pdev->dev, "Failed to get pcie rc clock\n");
- return PTR_ERR(pp->clk);
- }
- ret = clk_prepare_enable(pp->clk);
- if (ret)
- return ret;
-
- pp->bus_clk = devm_clk_get(&pdev->dev, "pcie_bus");
- if (IS_ERR(pp->bus_clk)) {
- dev_err(&pdev->dev, "Failed to get pcie bus clock\n");
- ret = PTR_ERR(pp->bus_clk);
- goto fail_clk;
- }
- ret = clk_prepare_enable(pp->bus_clk);
- if (ret)
- goto fail_clk;
-
- ret = add_pcie_port(pp, pdev);
- if (ret < 0)
- goto fail_bus_clk;
-
- pp->controller = exynos_pci.nr_controllers;
- exynos_pci.nr_controllers = 1;
- exynos_pci.private_data = (void **)&pp;
-
- pci_common_init(&exynos_pci);
- pci_assign_unassigned_resources();
-#ifdef CONFIG_PCI_DOMAINS
- exynos_pci.domain++;
-#endif
-
- platform_set_drvdata(pdev, pp);
- return 0;
-
-fail_bus_clk:
- clk_disable_unprepare(pp->bus_clk);
-fail_clk:
- clk_disable_unprepare(pp->clk);
- return ret;
-}
-
-static int __exit exynos_pcie_remove(struct platform_device *pdev)
-{
- struct pcie_port *pp = platform_get_drvdata(pdev);
-
- clk_disable_unprepare(pp->bus_clk);
- clk_disable_unprepare(pp->clk);
-
- return 0;
-}
-
-static const struct of_device_id exynos_pcie_of_match[] = {
- { .compatible = "samsung,exynos5440-pcie", },
- {},
-};
-MODULE_DEVICE_TABLE(of, exynos_pcie_of_match);
-
-static struct platform_driver exynos_pcie_driver = {
- .remove = __exit_p(exynos_pcie_remove),
- .driver = {
- .name = "exynos-pcie",
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(exynos_pcie_of_match),
- },
-};
-
-static int exynos_pcie_abort(unsigned long addr, unsigned int fsr,
- struct pt_regs *regs)
-{
- unsigned long pc = instruction_pointer(regs);
- unsigned long instr = *(unsigned long *)pc;
-
- WARN_ONCE(1, "pcie abort\n");
-
- /*
- * If the instruction being executed was a read,
- * make it look like it read all-ones.
- */
- if ((instr & 0x0c100000) == 0x04100000) {
- int reg = (instr >> 12) & 15;
- unsigned long val;
-
- if (instr & 0x00400000)
- val = 255;
- else
- val = -1;
-
- regs->uregs[reg] = val;
- regs->ARM_pc += 4;
- return 0;
- }
-
- if ((instr & 0x0e100090) == 0x00100090) {
- int reg = (instr >> 12) & 15;
-
- regs->uregs[reg] = -1;
- regs->ARM_pc += 4;
- return 0;
- }
-
- return 1;
-}
-
-/* Exynos PCIe driver does not allow module unload */
-
-static int __init pcie_init(void)
-{
- hook_fault_code(16 + 6, exynos_pcie_abort, SIGBUS, 0,
- "imprecise external abort");
-
- platform_driver_probe(&exynos_pcie_driver, exynos_pcie_probe);
-
- return 0;
+ dw_pcie_writel_rc(pp, val, dbi_base + PCI_COMMAND);
}
-subsys_initcall(pcie_init);
MODULE_AUTHOR("Jingoo Han <jg1.han@xxxxxxxxxxx>");
-MODULE_DESCRIPTION("Samsung PCIe host controller driver");
+MODULE_DESCRIPTION("Designware PCIe host controller driver");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h
new file mode 100644
index 0000000..4ed10e2
--- /dev/null
+++ b/drivers/pci/host/pcie-designware.h
@@ -0,0 +1,65 @@
+/*
+ * Synopsys Designware PCIe host controller driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Jingoo Han <jg1.han@xxxxxxxxxxx>
+ *
+ * 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.
+ */
+
+struct pcie_port_info {
+ u32 cfg0_size;
+ u32 cfg1_size;
+ u32 io_size;
+ u32 mem_size;
+ phys_addr_t io_bus_addr;
+ phys_addr_t mem_bus_addr;
+};
+
+struct pcie_port {
+ struct device *dev;
+ u8 root_bus_nr;
+ void __iomem *dbi_base;
+ u64 cfg0_base;
+ void __iomem *va_cfg0_base;
+ u64 cfg1_base;
+ void __iomem *va_cfg1_base;
+ u64 io_base;
+ u64 mem_base;
+ spinlock_t conf_lock;
+ struct resource cfg;
+ struct resource io;
+ struct resource mem;
+ struct pcie_port_info config;
+ int irq;
+ u32 lanes;
+ struct pcie_host_ops *ops;
+};
+
+struct pcie_host_ops {
+ void (*readl_rc)(struct pcie_port *pp, void *dbi_base, u32 *val);
+ void (*writel_rc)(struct pcie_port *pp, u32 val, void *dbi_base);
+ int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
+ int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val);
+ int (*link_up)(struct pcie_port *pp);
+ void (*host_init)(struct pcie_port *pp);
+};
+
+extern struct hw_pci dw_pci;
+
+extern unsigned long global_io_offset;
+
+int cfg_read(void *addr, int where, int size, u32 *val);
+int cfg_write(void *addr, int where, int size, u32 val);
+int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size, u32 val);
+int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, u32 *val);
+int dw_pcie_link_up(struct pcie_port *pp);
+void dw_pcie_setup_rc(struct pcie_port *pp);
+int dw_pcie_host_init(struct pcie_port *pp);
+int dw_pcie_setup(int nr, struct pci_sys_data *sys);
+struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys);
+int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
--
1.7.10.4
--
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