From f48fbf9c7e892d1b070affb273970d948b825939 Mon Sep 17 00:00:00 2001 From: Tushar Behera Date: Mon, 17 Jun 2013 14:46:13 +0530 Subject: PCI: mvebu: Convert to use devm_ioremap_resource Commit 75096579c3ac ("lib: devres: Introduce devm_ioremap_resource()") introduced devm_ioremap_resource() and deprecated the use of devm_request_and_ioremap(). While at it, modify mvebu_pcie_map_registers() to propagate error code. Signed-off-by: Tushar Behera Signed-off-by: Bjorn Helgaas Acked-by: Ezequiel Garcia --- drivers/pci/host/pci-mvebu.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers/pci') diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c index 13a633b1612..8fc2a8241fa 100644 --- a/drivers/pci/host/pci-mvebu.c +++ b/drivers/pci/host/pci-mvebu.c @@ -750,9 +750,9 @@ mvebu_pcie_map_registers(struct platform_device *pdev, ret = of_address_to_resource(np, 0, ®s); if (ret) - return NULL; + return ERR_PTR(ret); - return devm_request_and_ioremap(&pdev->dev, ®s); + return devm_ioremap_resource(&pdev->dev, ®s); } static int __init mvebu_pcie_probe(struct platform_device *pdev) @@ -842,9 +842,10 @@ static int __init mvebu_pcie_probe(struct platform_device *pdev) continue; port->base = mvebu_pcie_map_registers(pdev, child, port); - if (!port->base) { + if (IS_ERR(port->base)) { dev_err(&pdev->dev, "PCIe%d.%d: cannot map registers\n", port->port, port->lane); + port->base = NULL; continue; } -- cgit v1.2.3 From 5477a33b51b7282aca731213dc592b5f0c4e7c13 Mon Sep 17 00:00:00 2001 From: Thomas Petazzoni Date: Fri, 9 Aug 2013 12:35:50 +0200 Subject: PCI: mvebu: Make Marvell PCIe driver depend on OF The Marvell PCIe host controller driver is heavily tied to Device Tree APIs, and can only be used on platforms where the Device Tree is used. Therefore, it should "depends on OF" to avoid build failures on !OF configurations. Reported-by: Ezequiel Garcia Tested-by: Ezequiel Garcia Signed-off-by: Thomas Petazzoni Signed-off-by: Bjorn Helgaas --- drivers/pci/host/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/pci') diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig index 1184ff6fe86..e5ba4eb4e5b 100644 --- a/drivers/pci/host/Kconfig +++ b/drivers/pci/host/Kconfig @@ -4,6 +4,7 @@ menu "PCI host controller drivers" config PCI_MVEBU bool "Marvell EBU PCIe controller" depends on ARCH_MVEBU || ARCH_KIRKWOOD + depends on OF config PCIE_DW bool -- cgit v1.2.3 From 4b1ced841b2e31470ae4bb47988891754ce4d8c7 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Wed, 31 Jul 2013 17:14:10 +0900 Subject: PCI: exynos: Split into Synopsys part and Exynos part 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 Signed-off-by: Bjorn Helgaas Cc: Pratyush Anand Cc: Mohit KUMAR --- drivers/pci/host/Makefile | 3 +- drivers/pci/host/pci-exynos.c | 530 +++++++++++++++++++ drivers/pci/host/pcie-designware.c | 1011 ++++++++++-------------------------- drivers/pci/host/pcie-designware.h | 65 +++ 4 files changed, 869 insertions(+), 740 deletions(-) create mode 100644 drivers/pci/host/pci-exynos.c create mode 100644 drivers/pci/host/pcie-designware.h (limited to 'drivers/pci') diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile index 086d8500e84..ab79ccb5bbf 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-$(CONFIG_PCI_EXYNOS) += pci-exynos.o +obj-$(CONFIG_PCI_MVEBU) += pci-mvebu.o diff --git a/drivers/pci/host/pci-exynos.c b/drivers/pci/host/pci-exynos.c new file mode 100644 index 00000000000..012ca8aec71 --- /dev/null +++ b/drivers/pci/host/pci-exynos.c @@ -0,0 +1,530 @@ +/* + * PCIe host controller driver for Samsung EXYNOS SoCs + * + * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * Author: Jingoo Han + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 __iomem *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 __iomem *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) +{ + int ret; + + 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; + struct resource *elbi_base; + struct resource *phy_base; + struct resource *block_base; + 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; + + elbi_base = platform_get_resource(pdev, IORESOURCE_MEM, 0); + 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); + 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); + 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); + + ret = add_pcie_port(pp, pdev); + if (ret < 0) + goto fail_bus_clk; + + 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 "); +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 26bdbda8ff9..77b0c257f21 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 -#include -#include -#include #include -#include #include -#include #include -#include -#include #include #include -#include -#include -#include -#include #include -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 +62,16 @@ 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; +static struct hw_pci dw_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 __iomem *addr, int where, int size, u32 *val) { *val = readl(addr); @@ -184,7 +85,7 @@ 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 __iomem *addr, int where, int size, u32 val) { if (size == 4) writel(val, addr); @@ -198,155 +99,241 @@ 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) +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_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) -{ - 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 __init 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; + } + } + + if (!pp->dbi_base) { + 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); + + 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 + + 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 +344,19 @@ 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 +367,25 @@ 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 +403,7 @@ 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 +415,23 @@ 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 +443,56 @@ 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 +502,20 @@ 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, +static 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 +524,67 @@ 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 "); -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 00000000000..133820f1da9 --- /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 + * + * 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 __iomem *dbi_base, u32 *val); + void (*writel_rc)(struct pcie_port *pp, + u32 val, void __iomem *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 unsigned long global_io_offset; + +int cfg_read(void __iomem *addr, int where, int size, u32 *val); +int cfg_write(void __iomem *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); -- cgit v1.2.3