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Fri, 28 Feb 2020 07:41:52 -0800 (PST) From: Lad Prabhakar X-Google-Original-From: Lad Prabhakar To: Bjorn Helgaas , Rob Herring , Mark Rutland , Catalin Marinas , Will Deacon , Kishon Vijay Abraham I , Lorenzo Pieralisi , Arnd Bergmann , Greg Kroah-Hartman , Jingoo Han , Gustavo Pimentel , Marek Vasut , Yoshihiro Shimoda , Shawn Lin , Heiko Stuebner Subject: [PATCH v5 2/7] PCI: rcar: Move shareable code to a common file Date: Fri, 28 Feb 2020 15:41:17 +0000 Message-Id: <20200228154122.14164-3-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200228154122.14164-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20200228154122.14164-1-prabhakar.mahadev-lad.rj@bp.renesas.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200228_074155_023175_C1BB0192 X-CRM114-Status: GOOD ( 21.29 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:444 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider [prabhakar.csengg[at]gmail.com] -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Lad Prabhakar , linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, Andrew Murray , linux-arm-kernel@lists.infradead.org Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org This patch moves sharable code to common file pcie-rcar.c and the #defines to pcie-rcar.h so that the common code can be reused with endpoint driver. There are no functional changes with this patch for the host controller driver. Signed-off-by: Lad Prabhakar --- drivers/pci/controller/Makefile | 2 +- drivers/pci/controller/pcie-rcar-host.c | 358 ++++++++------------------------ drivers/pci/controller/pcie-rcar.c | 117 +++++++++++ drivers/pci/controller/pcie-rcar.h | 125 +++++++++++ 4 files changed, 324 insertions(+), 278 deletions(-) create mode 100644 drivers/pci/controller/pcie-rcar.c create mode 100644 drivers/pci/controller/pcie-rcar.h diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile index 4ca2da6..b4ada32 100644 --- a/drivers/pci/controller/Makefile +++ b/drivers/pci/controller/Makefile @@ -7,7 +7,7 @@ obj-$(CONFIG_PCI_MVEBU) += pci-mvebu.o obj-$(CONFIG_PCI_AARDVARK) += pci-aardvark.o obj-$(CONFIG_PCI_TEGRA) += pci-tegra.o obj-$(CONFIG_PCI_RCAR_GEN2) += pci-rcar-gen2.o -obj-$(CONFIG_PCIE_RCAR_HOST) += pcie-rcar-host.o +obj-$(CONFIG_PCIE_RCAR_HOST) += pcie-rcar.o pcie-rcar-host.o obj-$(CONFIG_PCI_HOST_COMMON) += pci-host-common.o obj-$(CONFIG_PCI_HOST_GENERIC) += pci-host-generic.o obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx.o diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c index 759c654..93f22d8 100644 --- a/drivers/pci/controller/pcie-rcar-host.c +++ b/drivers/pci/controller/pcie-rcar-host.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* * PCIe driver for Renesas R-Car SoCs - * Copyright (C) 2014 Renesas Electronics Europe Ltd + * Copyright (C) 2014-2020 Renesas Electronics Europe Ltd * * Based on: * arch/sh/drivers/pci/pcie-sh7786.c @@ -30,104 +30,7 @@ #include #include -#define PCIECAR 0x000010 -#define PCIECCTLR 0x000018 -#define CONFIG_SEND_ENABLE BIT(31) -#define TYPE0 (0 << 8) -#define TYPE1 BIT(8) -#define PCIECDR 0x000020 -#define PCIEMSR 0x000028 -#define PCIEINTXR 0x000400 -#define PCIEPHYSR 0x0007f0 -#define PHYRDY BIT(0) -#define PCIEMSITXR 0x000840 - -/* Transfer control */ -#define PCIETCTLR 0x02000 -#define DL_DOWN BIT(3) -#define CFINIT BIT(0) -#define PCIETSTR 0x02004 -#define DATA_LINK_ACTIVE BIT(0) -#define PCIEERRFR 0x02020 -#define UNSUPPORTED_REQUEST BIT(4) -#define PCIEMSIFR 0x02044 -#define PCIEMSIALR 0x02048 -#define MSIFE BIT(0) -#define PCIEMSIAUR 0x0204c -#define PCIEMSIIER 0x02050 - -/* root port address */ -#define PCIEPRAR(x) (0x02080 + ((x) * 0x4)) - -/* local address reg & mask */ -#define PCIELAR(x) (0x02200 + ((x) * 0x20)) -#define PCIELAMR(x) (0x02208 + ((x) * 0x20)) -#define LAM_PREFETCH BIT(3) -#define LAM_64BIT BIT(2) -#define LAR_ENABLE BIT(1) - -/* PCIe address reg & mask */ -#define PCIEPALR(x) (0x03400 + ((x) * 0x20)) -#define PCIEPAUR(x) (0x03404 + ((x) * 0x20)) -#define PCIEPAMR(x) (0x03408 + ((x) * 0x20)) -#define PCIEPTCTLR(x) (0x0340c + ((x) * 0x20)) -#define PAR_ENABLE BIT(31) -#define IO_SPACE BIT(8) - -/* Configuration */ -#define PCICONF(x) (0x010000 + ((x) * 0x4)) -#define PMCAP(x) (0x010040 + ((x) * 0x4)) -#define EXPCAP(x) (0x010070 + ((x) * 0x4)) -#define VCCAP(x) (0x010100 + ((x) * 0x4)) - -/* link layer */ -#define IDSETR1 0x011004 -#define TLCTLR 0x011048 -#define MACSR 0x011054 -#define SPCHGFIN BIT(4) -#define SPCHGFAIL BIT(6) -#define SPCHGSUC BIT(7) -#define LINK_SPEED (0xf << 16) -#define LINK_SPEED_2_5GTS (1 << 16) -#define LINK_SPEED_5_0GTS (2 << 16) -#define MACCTLR 0x011058 -#define MACCTLR_NFTS_MASK GENMASK(23, 16) /* The name is from SH7786 */ -#define SPEED_CHANGE BIT(24) -#define SCRAMBLE_DISABLE BIT(27) -#define LTSMDIS BIT(31) -#define MACCTLR_INIT_VAL (LTSMDIS | MACCTLR_NFTS_MASK) -#define PMSR 0x01105c -#define MACS2R 0x011078 -#define MACCGSPSETR 0x011084 -#define SPCNGRSN BIT(31) - -/* R-Car H1 PHY */ -#define H1_PCIEPHYADRR 0x04000c -#define WRITE_CMD BIT(16) -#define PHY_ACK BIT(24) -#define RATE_POS 12 -#define LANE_POS 8 -#define ADR_POS 0 -#define H1_PCIEPHYDOUTR 0x040014 - -/* R-Car Gen2 PHY */ -#define GEN2_PCIEPHYADDR 0x780 -#define GEN2_PCIEPHYDATA 0x784 -#define GEN2_PCIEPHYCTRL 0x78c - -#define INT_PCI_MSI_NR 32 - -#define RCONF(x) (PCICONF(0) + (x)) -#define RPMCAP(x) (PMCAP(0) + (x)) -#define REXPCAP(x) (EXPCAP(0) + (x)) -#define RVCCAP(x) (VCCAP(0) + (x)) - -#define PCIE_CONF_BUS(b) (((b) & 0xff) << 24) -#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 19) -#define PCIE_CONF_FUNC(f) (((f) & 0x7) << 16) - -#define RCAR_PCI_MAX_RESOURCES 4 -#define MAX_NR_INBOUND_MAPS 6 +#include "pcie-rcar.h" struct rcar_msi { DECLARE_BITMAP(used, INT_PCI_MSI_NR); @@ -155,36 +58,10 @@ struct rcar_pcie { struct rcar_msi msi; }; -static void rcar_pci_write_reg(struct rcar_pcie *pcie, u32 val, - unsigned int reg) -{ - writel(val, pcie->base + reg); -} - -static u32 rcar_pci_read_reg(struct rcar_pcie *pcie, unsigned int reg) -{ - return readl(pcie->base + reg); -} - -enum { - RCAR_PCI_ACCESS_READ, - RCAR_PCI_ACCESS_WRITE, -}; - -static void rcar_rmw32(struct rcar_pcie *pcie, int where, u32 mask, u32 data) -{ - unsigned int shift = BITS_PER_BYTE * (where & 3); - u32 val = rcar_pci_read_reg(pcie, where & ~3); - - val &= ~(mask << shift); - val |= data << shift; - rcar_pci_write_reg(pcie, val, where & ~3); -} - static u32 rcar_read_conf(struct rcar_pcie *pcie, int where) { unsigned int shift = BITS_PER_BYTE * (where & 3); - u32 val = rcar_pci_read_reg(pcie, where & ~3); + u32 val = rcar_pci_read_reg(pcie->base, where & ~3); return val >> shift; } @@ -221,13 +98,13 @@ static int rcar_pcie_config_access(struct rcar_pcie *pcie, return PCIBIOS_DEVICE_NOT_FOUND; if (access_type == RCAR_PCI_ACCESS_READ) { - *data = rcar_pci_read_reg(pcie, PCICONF(index)); + *data = rcar_pci_read_reg(pcie->base, PCICONF(index)); } else { /* Keep an eye out for changes to the root bus number */ if (pci_is_root_bus(bus) && (reg == PCI_PRIMARY_BUS)) pcie->root_bus_nr = *data & 0xff; - rcar_pci_write_reg(pcie, *data, PCICONF(index)); + rcar_pci_write_reg(pcie->base, *data, PCICONF(index)); } return PCIBIOS_SUCCESSFUL; @@ -237,20 +114,23 @@ static int rcar_pcie_config_access(struct rcar_pcie *pcie, return PCIBIOS_DEVICE_NOT_FOUND; /* Clear errors */ - rcar_pci_write_reg(pcie, rcar_pci_read_reg(pcie, PCIEERRFR), PCIEERRFR); + rcar_pci_write_reg(pcie->base, rcar_pci_read_reg(pcie->base, PCIEERRFR), + PCIEERRFR); /* Set the PIO address */ - rcar_pci_write_reg(pcie, PCIE_CONF_BUS(bus->number) | + rcar_pci_write_reg(pcie->base, PCIE_CONF_BUS(bus->number) | PCIE_CONF_DEV(dev) | PCIE_CONF_FUNC(func) | reg, PCIECAR); /* Enable the configuration access */ if (bus->parent->number == pcie->root_bus_nr) - rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE0, PCIECCTLR); + rcar_pci_write_reg(pcie->base, CONFIG_SEND_ENABLE | TYPE0, + PCIECCTLR); else - rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE1, PCIECCTLR); + rcar_pci_write_reg(pcie->base, CONFIG_SEND_ENABLE | TYPE1, + PCIECCTLR); /* Check for errors */ - if (rcar_pci_read_reg(pcie, PCIEERRFR) & UNSUPPORTED_REQUEST) + if (rcar_pci_read_reg(pcie->base, PCIEERRFR) & UNSUPPORTED_REQUEST) return PCIBIOS_DEVICE_NOT_FOUND; /* Check for master and target aborts */ @@ -259,12 +139,12 @@ static int rcar_pcie_config_access(struct rcar_pcie *pcie, return PCIBIOS_DEVICE_NOT_FOUND; if (access_type == RCAR_PCI_ACCESS_READ) - *data = rcar_pci_read_reg(pcie, PCIECDR); + *data = rcar_pci_read_reg(pcie->base, PCIECDR); else - rcar_pci_write_reg(pcie, *data, PCIECDR); + rcar_pci_write_reg(pcie->base, *data, PCIECDR); /* Disable the configuration access */ - rcar_pci_write_reg(pcie, 0, PCIECCTLR); + rcar_pci_write_reg(pcie->base, 0, PCIECCTLR); return PCIBIOS_SUCCESSFUL; } @@ -332,41 +212,6 @@ static struct pci_ops rcar_pcie_ops = { .write = rcar_pcie_write_conf, }; -static void rcar_pcie_setup_window(int win, struct rcar_pcie *pcie, - struct resource *res) -{ - /* Setup PCIe address space mappings for each resource */ - resource_size_t size; - resource_size_t res_start; - u32 mask; - - rcar_pci_write_reg(pcie, 0x00000000, PCIEPTCTLR(win)); - - /* - * The PAMR mask is calculated in units of 128Bytes, which - * keeps things pretty simple. - */ - size = resource_size(res); - mask = (roundup_pow_of_two(size) / SZ_128) - 1; - rcar_pci_write_reg(pcie, mask << 7, PCIEPAMR(win)); - - if (res->flags & IORESOURCE_IO) - res_start = pci_pio_to_address(res->start); - else - res_start = res->start; - - rcar_pci_write_reg(pcie, upper_32_bits(res_start), PCIEPAUR(win)); - rcar_pci_write_reg(pcie, lower_32_bits(res_start) & ~0x7F, - PCIEPALR(win)); - - /* First resource is for IO */ - mask = PAR_ENABLE; - if (res->flags & IORESOURCE_IO) - mask |= IO_SPACE; - - rcar_pci_write_reg(pcie, mask, PCIEPTCTLR(win)); -} - static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pci) { struct resource_entry *win; @@ -382,7 +227,7 @@ static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pci) switch (resource_type(res)) { case IORESOURCE_IO: case IORESOURCE_MEM: - rcar_pcie_setup_window(i, pci, res); + rcar_pcie_set_outbound(i, pci->base, res); i++; break; case IORESOURCE_BUS: @@ -404,37 +249,38 @@ static void rcar_pcie_force_speedup(struct rcar_pcie *pcie) unsigned int timeout = 1000; u32 macsr; - if ((rcar_pci_read_reg(pcie, MACS2R) & LINK_SPEED) != LINK_SPEED_5_0GTS) + if ((rcar_pci_read_reg(pcie->base, MACS2R) & LINK_SPEED) != + LINK_SPEED_5_0GTS) return; - if (rcar_pci_read_reg(pcie, MACCTLR) & SPEED_CHANGE) { + if (rcar_pci_read_reg(pcie->base, MACCTLR) & SPEED_CHANGE) { dev_err(dev, "Speed change already in progress\n"); return; } - macsr = rcar_pci_read_reg(pcie, MACSR); + macsr = rcar_pci_read_reg(pcie->base, MACSR); if ((macsr & LINK_SPEED) == LINK_SPEED_5_0GTS) goto done; /* Set target link speed to 5.0 GT/s */ - rcar_rmw32(pcie, EXPCAP(12), PCI_EXP_LNKSTA_CLS, + rcar_rmw32(pcie->base, EXPCAP(12), PCI_EXP_LNKSTA_CLS, PCI_EXP_LNKSTA_CLS_5_0GB); /* Set speed change reason as intentional factor */ - rcar_rmw32(pcie, MACCGSPSETR, SPCNGRSN, 0); + rcar_rmw32(pcie->base, MACCGSPSETR, SPCNGRSN, 0); /* Clear SPCHGFIN, SPCHGSUC, and SPCHGFAIL */ if (macsr & (SPCHGFIN | SPCHGSUC | SPCHGFAIL)) - rcar_pci_write_reg(pcie, macsr, MACSR); + rcar_pci_write_reg(pcie->base, macsr, MACSR); /* Start link speed change */ - rcar_rmw32(pcie, MACCTLR, SPEED_CHANGE, SPEED_CHANGE); + rcar_rmw32(pcie->base, MACCTLR, SPEED_CHANGE, SPEED_CHANGE); while (timeout--) { - macsr = rcar_pci_read_reg(pcie, MACSR); + macsr = rcar_pci_read_reg(pcie->base, MACSR); if (macsr & SPCHGFIN) { /* Clear the interrupt bits */ - rcar_pci_write_reg(pcie, macsr, MACSR); + rcar_pci_write_reg(pcie->base, macsr, MACSR); if (macsr & SPCHGFAIL) dev_err(dev, "Speed change failed\n"); @@ -498,7 +344,7 @@ static int phy_wait_for_ack(struct rcar_pcie *pcie) unsigned int timeout = 100; while (timeout--) { - if (rcar_pci_read_reg(pcie, H1_PCIEPHYADRR) & PHY_ACK) + if (rcar_pci_read_reg(pcie->base, H1_PCIEPHYADRR) & PHY_ACK) return 0; udelay(100); @@ -521,60 +367,31 @@ static void phy_write_reg(struct rcar_pcie *pcie, ((addr & 0xff) << ADR_POS); /* Set write data */ - rcar_pci_write_reg(pcie, data, H1_PCIEPHYDOUTR); - rcar_pci_write_reg(pcie, phyaddr, H1_PCIEPHYADRR); + rcar_pci_write_reg(pcie->base, data, H1_PCIEPHYDOUTR); + rcar_pci_write_reg(pcie->base, phyaddr, H1_PCIEPHYADRR); /* Ignore errors as they will be dealt with if the data link is down */ phy_wait_for_ack(pcie); /* Clear command */ - rcar_pci_write_reg(pcie, 0, H1_PCIEPHYDOUTR); - rcar_pci_write_reg(pcie, 0, H1_PCIEPHYADRR); + rcar_pci_write_reg(pcie->base, 0, H1_PCIEPHYDOUTR); + rcar_pci_write_reg(pcie->base, 0, H1_PCIEPHYADRR); /* Ignore errors as they will be dealt with if the data link is down */ phy_wait_for_ack(pcie); } -static int rcar_pcie_wait_for_phyrdy(struct rcar_pcie *pcie) -{ - unsigned int timeout = 10; - - while (timeout--) { - if (rcar_pci_read_reg(pcie, PCIEPHYSR) & PHYRDY) - return 0; - - msleep(5); - } - - return -ETIMEDOUT; -} - -static int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie) -{ - unsigned int timeout = 10000; - - while (timeout--) { - if ((rcar_pci_read_reg(pcie, PCIETSTR) & DATA_LINK_ACTIVE)) - return 0; - - udelay(5); - cpu_relax(); - } - - return -ETIMEDOUT; -} - static int rcar_pcie_hw_init(struct rcar_pcie *pcie) { int err; /* Begin initialization */ - rcar_pci_write_reg(pcie, 0, PCIETCTLR); + rcar_pci_write_reg(pcie->base, 0, PCIETCTLR); /* Set mode */ - rcar_pci_write_reg(pcie, 1, PCIEMSR); + rcar_pci_write_reg(pcie->base, 1, PCIEMSR); - err = rcar_pcie_wait_for_phyrdy(pcie); + err = rcar_pcie_wait_for_phyrdy(pcie->base); if (err) return err; @@ -583,51 +400,51 @@ static int rcar_pcie_hw_init(struct rcar_pcie *pcie) * class to match. Hardware takes care of propagating the IDSETR * settings, so there is no need to bother with a quirk. */ - rcar_pci_write_reg(pcie, PCI_CLASS_BRIDGE_PCI << 16, IDSETR1); + rcar_pci_write_reg(pcie->base, PCI_CLASS_BRIDGE_PCI << 16, IDSETR1); /* * Setup Secondary Bus Number & Subordinate Bus Number, even though * they aren't used, to avoid bridge being detected as broken. */ - rcar_rmw32(pcie, RCONF(PCI_SECONDARY_BUS), 0xff, 1); - rcar_rmw32(pcie, RCONF(PCI_SUBORDINATE_BUS), 0xff, 1); + rcar_rmw32(pcie->base, RCONF(PCI_SECONDARY_BUS), 0xff, 1); + rcar_rmw32(pcie->base, RCONF(PCI_SUBORDINATE_BUS), 0xff, 1); /* Initialize default capabilities. */ - rcar_rmw32(pcie, REXPCAP(0), 0xff, PCI_CAP_ID_EXP); - rcar_rmw32(pcie, REXPCAP(PCI_EXP_FLAGS), - PCI_EXP_FLAGS_TYPE, PCI_EXP_TYPE_ROOT_PORT << 4); - rcar_rmw32(pcie, RCONF(PCI_HEADER_TYPE), 0x7f, - PCI_HEADER_TYPE_BRIDGE); + rcar_rmw32(pcie->base, REXPCAP(0), 0xff, PCI_CAP_ID_EXP); + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_FLAGS), + PCI_EXP_FLAGS_TYPE, PCI_EXP_TYPE_ROOT_PORT << 4); + rcar_rmw32(pcie->base, RCONF(PCI_HEADER_TYPE), 0x7f, + PCI_HEADER_TYPE_BRIDGE); /* Enable data link layer active state reporting */ - rcar_rmw32(pcie, REXPCAP(PCI_EXP_LNKCAP), PCI_EXP_LNKCAP_DLLLARC, - PCI_EXP_LNKCAP_DLLLARC); + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_LNKCAP), PCI_EXP_LNKCAP_DLLLARC, + PCI_EXP_LNKCAP_DLLLARC); /* Write out the physical slot number = 0 */ - rcar_rmw32(pcie, REXPCAP(PCI_EXP_SLTCAP), PCI_EXP_SLTCAP_PSN, 0); + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_SLTCAP), PCI_EXP_SLTCAP_PSN, 0); /* Set the completion timer timeout to the maximum 50ms. */ - rcar_rmw32(pcie, TLCTLR + 1, 0x3f, 50); + rcar_rmw32(pcie->base, TLCTLR + 1, 0x3f, 50); /* Terminate list of capabilities (Next Capability Offset=0) */ - rcar_rmw32(pcie, RVCCAP(0), 0xfff00000, 0); + rcar_rmw32(pcie->base, RVCCAP(0), 0xfff00000, 0); /* Enable MSI */ if (IS_ENABLED(CONFIG_PCI_MSI)) - rcar_pci_write_reg(pcie, 0x801f0000, PCIEMSITXR); + rcar_pci_write_reg(pcie->base, 0x801f0000, PCIEMSITXR); - rcar_pci_write_reg(pcie, MACCTLR_INIT_VAL, MACCTLR); + rcar_pci_write_reg(pcie->base, MACCTLR_INIT_VAL, MACCTLR); /* Finish initialization - establish a PCI Express link */ - rcar_pci_write_reg(pcie, CFINIT, PCIETCTLR); + rcar_pci_write_reg(pcie->base, CFINIT, PCIETCTLR); /* This will timeout if we don't have a link. */ - err = rcar_pcie_wait_for_dl(pcie); + err = rcar_pcie_wait_for_dl(pcie->base); if (err) return err; /* Enable INTx interrupts */ - rcar_rmw32(pcie, PCIEINTXR, 0, 0xF << 8); + rcar_rmw32(pcie->base, PCIEINTXR, 0, 0xF << 8); wmb(); @@ -663,16 +480,16 @@ static int rcar_pcie_phy_init_gen2(struct rcar_pcie *pcie) * These settings come from the R-Car Series, 2nd Generation User's * Manual, section 50.3.1 (2) Initialization of the physical layer. */ - rcar_pci_write_reg(pcie, 0x000f0030, GEN2_PCIEPHYADDR); - rcar_pci_write_reg(pcie, 0x00381203, GEN2_PCIEPHYDATA); - rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); - rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); + rcar_pci_write_reg(pcie->base, 0x000f0030, GEN2_PCIEPHYADDR); + rcar_pci_write_reg(pcie->base, 0x00381203, GEN2_PCIEPHYDATA); + rcar_pci_write_reg(pcie->base, 0x00000001, GEN2_PCIEPHYCTRL); + rcar_pci_write_reg(pcie->base, 0x00000006, GEN2_PCIEPHYCTRL); - rcar_pci_write_reg(pcie, 0x000f0054, GEN2_PCIEPHYADDR); + rcar_pci_write_reg(pcie->base, 0x000f0054, GEN2_PCIEPHYADDR); /* The following value is for DC connection, no termination resistor */ - rcar_pci_write_reg(pcie, 0x13802007, GEN2_PCIEPHYDATA); - rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); - rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); + rcar_pci_write_reg(pcie->base, 0x13802007, GEN2_PCIEPHYDATA); + rcar_pci_write_reg(pcie->base, 0x00000001, GEN2_PCIEPHYCTRL); + rcar_pci_write_reg(pcie->base, 0x00000006, GEN2_PCIEPHYCTRL); return 0; } @@ -735,7 +552,7 @@ static irqreturn_t rcar_pcie_msi_irq(int irq, void *data) struct device *dev = pcie->dev; unsigned long reg; - reg = rcar_pci_read_reg(pcie, PCIEMSIFR); + reg = rcar_pci_read_reg(pcie->base, PCIEMSIFR); /* MSI & INTx share an interrupt - we only handle MSI here */ if (!reg) @@ -746,7 +563,7 @@ static irqreturn_t rcar_pcie_msi_irq(int irq, void *data) unsigned int msi_irq; /* clear the interrupt */ - rcar_pci_write_reg(pcie, 1 << index, PCIEMSIFR); + rcar_pci_write_reg(pcie->base, 1 << index, PCIEMSIFR); msi_irq = irq_find_mapping(msi->domain, index); if (msi_irq) { @@ -760,7 +577,7 @@ static irqreturn_t rcar_pcie_msi_irq(int irq, void *data) } /* see if there's any more pending in this vector */ - reg = rcar_pci_read_reg(pcie, PCIEMSIFR); + reg = rcar_pci_read_reg(pcie->base, PCIEMSIFR); } return IRQ_HANDLED; @@ -787,8 +604,8 @@ static int rcar_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev, irq_set_msi_desc(irq, desc); - msg.address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE; - msg.address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR); + msg.address_lo = rcar_pci_read_reg(pcie->base, PCIEMSIALR) & ~MSIFE; + msg.address_hi = rcar_pci_read_reg(pcie->base, PCIEMSIAUR); msg.data = hwirq; pci_write_msi_msg(irq, &msg); @@ -839,8 +656,8 @@ static int rcar_msi_setup_irqs(struct msi_controller *chip, desc->nvec_used = nvec; desc->msi_attrib.multiple = order_base_2(nvec); - msg.address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE; - msg.address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR); + msg.address_lo = rcar_pci_read_reg(pcie->base, PCIEMSIALR) & ~MSIFE; + msg.address_hi = rcar_pci_read_reg(pcie->base, PCIEMSIAUR); msg.data = hwirq; pci_write_msi_msg(irq, &msg); @@ -940,11 +757,11 @@ static int rcar_pcie_enable_msi(struct rcar_pcie *pcie) } base = virt_to_phys((void *)msi->pages); - rcar_pci_write_reg(pcie, lower_32_bits(base) | MSIFE, PCIEMSIALR); - rcar_pci_write_reg(pcie, upper_32_bits(base), PCIEMSIAUR); + rcar_pci_write_reg(pcie->base, lower_32_bits(base) | MSIFE, PCIEMSIALR); + rcar_pci_write_reg(pcie->base, upper_32_bits(base), PCIEMSIAUR); /* enable all MSI interrupts */ - rcar_pci_write_reg(pcie, 0xffffffff, PCIEMSIIER); + rcar_pci_write_reg(pcie->base, 0xffffffff, PCIEMSIIER); return 0; @@ -958,10 +775,10 @@ static void rcar_pcie_teardown_msi(struct rcar_pcie *pcie) struct rcar_msi *msi = &pcie->msi; /* Disable all MSI interrupts */ - rcar_pci_write_reg(pcie, 0, PCIEMSIIER); + rcar_pci_write_reg(pcie->base, 0, PCIEMSIIER); /* Disable address decoding of the MSI interrupt, MSIFE */ - rcar_pci_write_reg(pcie, 0, PCIEMSIALR); + rcar_pci_write_reg(pcie->base, 0, PCIEMSIALR); free_pages(msi->pages, 0); @@ -1054,21 +871,8 @@ static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie, mask = roundup_pow_of_two(size) - 1; mask &= ~0xf; - /* - * Set up 64-bit inbound regions as the range parser doesn't - * distinguish between 32 and 64-bit types. - */ - rcar_pci_write_reg(pcie, lower_32_bits(pci_addr), - PCIEPRAR(idx)); - rcar_pci_write_reg(pcie, lower_32_bits(cpu_addr), PCIELAR(idx)); - rcar_pci_write_reg(pcie, lower_32_bits(mask) | flags, - PCIELAMR(idx)); - - rcar_pci_write_reg(pcie, upper_32_bits(pci_addr), - PCIEPRAR(idx + 1)); - rcar_pci_write_reg(pcie, upper_32_bits(cpu_addr), - PCIELAR(idx + 1)); - rcar_pci_write_reg(pcie, 0, PCIELAMR(idx + 1)); + rcar_pcie_set_inbound(pcie->base, cpu_addr, pci_addr, + lower_32_bits(mask) | flags, idx, true); pci_addr += size; cpu_addr += size; @@ -1170,7 +974,7 @@ static int rcar_pcie_probe(struct platform_device *pdev) goto err_phy_shutdown; } - data = rcar_pci_read_reg(pcie, MACSR); + data = rcar_pci_read_reg(pcie->base, MACSR); dev_info(dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f); if (IS_ENABLED(CONFIG_PCI_MSI)) { @@ -1223,14 +1027,14 @@ static int rcar_pcie_resume_noirq(struct device *dev) { struct rcar_pcie *pcie = dev_get_drvdata(dev); - if (rcar_pci_read_reg(pcie, PMSR) && - !(rcar_pci_read_reg(pcie, PCIETCTLR) & DL_DOWN)) + if (rcar_pci_read_reg(pcie->base, PMSR) && + !(rcar_pci_read_reg(pcie->base, PCIETCTLR) & DL_DOWN)) return 0; /* Re-establish the PCIe link */ - rcar_pci_write_reg(pcie, MACCTLR_INIT_VAL, MACCTLR); - rcar_pci_write_reg(pcie, CFINIT, PCIETCTLR); - return rcar_pcie_wait_for_dl(pcie); + rcar_pci_write_reg(pcie->base, MACCTLR_INIT_VAL, MACCTLR); + rcar_pci_write_reg(pcie->base, CFINIT, PCIETCTLR); + return rcar_pcie_wait_for_dl(pcie->base); } static const struct dev_pm_ops rcar_pcie_pm_ops = { diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c new file mode 100644 index 0000000..41275f9 --- /dev/null +++ b/drivers/pci/controller/pcie-rcar.c @@ -0,0 +1,117 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PCIe driver for Renesas R-Car SoCs + * Copyright (C) 2014-2020 Renesas Electronics Europe Ltd + * + * Author: Phil Edworthy + */ + +#include +#include + +#include "pcie-rcar.h" + +void rcar_pci_write_reg(void __iomem *base, u32 val, unsigned int reg) +{ + writel(val, base + reg); +} + +u32 rcar_pci_read_reg(void __iomem *base, unsigned int reg) +{ + return readl(base + reg); +} + +void rcar_rmw32(void __iomem *base, int where, u32 mask, u32 data) +{ + unsigned int shift = BITS_PER_BYTE * (where & 3); + u32 val = rcar_pci_read_reg(base, where & ~3); + + val &= ~(mask << shift); + val |= data << shift; + rcar_pci_write_reg(base, val, where & ~3); +} + +int rcar_pcie_wait_for_phyrdy(void __iomem *base) +{ + unsigned int timeout = 10; + + while (timeout--) { + if (rcar_pci_read_reg(base, PCIEPHYSR) & PHYRDY) + return 0; + + msleep(5); + } + + return -ETIMEDOUT; +} + +int rcar_pcie_wait_for_dl(void __iomem *base) +{ + unsigned int timeout = 10000; + + while (timeout--) { + if ((rcar_pci_read_reg(base, PCIETSTR) & DATA_LINK_ACTIVE)) + return 0; + + udelay(5); + cpu_relax(); + } + + return -ETIMEDOUT; +} + +void rcar_pcie_set_outbound(int win, void __iomem *base, + struct resource *res) +{ + /* Setup PCIe address space mappings for each resource */ + resource_size_t res_start; + resource_size_t size; + u32 mask; + + rcar_pci_write_reg(base, 0x00000000, PCIEPTCTLR(win)); + + /* + * The PAMR mask is calculated in units of 128Bytes, which + * keeps things pretty simple. + */ + size = resource_size(res); + mask = (roundup_pow_of_two(size) / SZ_128) - 1; + rcar_pci_write_reg(base, mask << 7, PCIEPAMR(win)); + + if (res->flags & IORESOURCE_IO) + res_start = pci_pio_to_address(res->start); + else + res_start = res->start; + + rcar_pci_write_reg(base, upper_32_bits(res_start), PCIEPAUR(win)); + rcar_pci_write_reg(base, lower_32_bits(res_start) & ~0x7F, + PCIEPALR(win)); + + /* First resource is for IO */ + mask = PAR_ENABLE; + if (res->flags & IORESOURCE_IO) + mask |= IO_SPACE; + + rcar_pci_write_reg(base, mask, PCIEPTCTLR(win)); +} + +void rcar_pcie_set_inbound(void __iomem *base, + u64 cpu_addr, u64 pci_addr, + u64 flags, int idx, bool host) +{ + /* + * Set up 64-bit inbound regions as the range parser doesn't + * distinguish between 32 and 64-bit types. + */ + if (host) + rcar_pci_write_reg(base, lower_32_bits(pci_addr), + PCIEPRAR(idx)); + rcar_pci_write_reg(base, lower_32_bits(cpu_addr), PCIELAR(idx)); + rcar_pci_write_reg(base, flags, PCIELAMR(idx)); + + if (host) + rcar_pci_write_reg(base, upper_32_bits(pci_addr), + PCIEPRAR(idx + 1)); + rcar_pci_write_reg(base, upper_32_bits(cpu_addr), PCIELAR(idx + 1)); + rcar_pci_write_reg(base, 0, PCIELAMR(idx + 1)); +} diff --git a/drivers/pci/controller/pcie-rcar.h b/drivers/pci/controller/pcie-rcar.h new file mode 100644 index 0000000..b529d806 --- /dev/null +++ b/drivers/pci/controller/pcie-rcar.h @@ -0,0 +1,125 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * PCIe driver for Renesas R-Car SoCs + * Copyright (C) 2014-2020 Renesas Electronics Europe Ltd + * + * Author: Phil Edworthy + */ + +#ifndef _PCIE_RCAR_H +#define _PCIE_RCAR_H + +#define PCIECAR 0x000010 +#define PCIECCTLR 0x000018 +#define CONFIG_SEND_ENABLE BIT(31) +#define TYPE0 (0 << 8) +#define TYPE1 BIT(8) +#define PCIECDR 0x000020 +#define PCIEMSR 0x000028 +#define PCIEINTXR 0x000400 +#define PCIEPHYSR 0x0007f0 +#define PHYRDY BIT(0) +#define PCIEMSITXR 0x000840 + +/* Transfer control */ +#define PCIETCTLR 0x02000 +#define DL_DOWN BIT(3) +#define CFINIT BIT(0) +#define PCIETSTR 0x02004 +#define DATA_LINK_ACTIVE BIT(0) +#define PCIEERRFR 0x02020 +#define UNSUPPORTED_REQUEST BIT(4) +#define PCIEMSIFR 0x02044 +#define PCIEMSIALR 0x02048 +#define MSIFE BIT(0) +#define PCIEMSIAUR 0x0204c +#define PCIEMSIIER 0x02050 + +/* root port address */ +#define PCIEPRAR(x) (0x02080 + ((x) * 0x4)) + +/* local address reg & mask */ +#define PCIELAR(x) (0x02200 + ((x) * 0x20)) +#define PCIELAMR(x) (0x02208 + ((x) * 0x20)) +#define LAM_PREFETCH BIT(3) +#define LAM_64BIT BIT(2) +#define LAR_ENABLE BIT(1) + +/* PCIe address reg & mask */ +#define PCIEPALR(x) (0x03400 + ((x) * 0x20)) +#define PCIEPAUR(x) (0x03404 + ((x) * 0x20)) +#define PCIEPAMR(x) (0x03408 + ((x) * 0x20)) +#define PCIEPTCTLR(x) (0x0340c + ((x) * 0x20)) +#define PAR_ENABLE BIT(31) +#define IO_SPACE BIT(8) + +/* Configuration */ +#define PCICONF(x) (0x010000 + ((x) * 0x4)) +#define PMCAP(x) (0x010040 + ((x) * 0x4)) +#define EXPCAP(x) (0x010070 + ((x) * 0x4)) +#define VCCAP(x) (0x010100 + ((x) * 0x4)) + +/* link layer */ +#define IDSETR1 0x011004 +#define TLCTLR 0x011048 +#define MACSR 0x011054 +#define SPCHGFIN BIT(4) +#define SPCHGFAIL BIT(6) +#define SPCHGSUC BIT(7) +#define LINK_SPEED (0xf << 16) +#define LINK_SPEED_2_5GTS (1 << 16) +#define LINK_SPEED_5_0GTS (2 << 16) +#define MACCTLR 0x011058 +#define MACCTLR_NFTS_MASK GENMASK(23, 16) /* The name is from SH7786 */ +#define SPEED_CHANGE BIT(24) +#define SCRAMBLE_DISABLE BIT(27) +#define LTSMDIS BIT(31) +#define MACCTLR_INIT_VAL (LTSMDIS | MACCTLR_NFTS_MASK) +#define PMSR 0x01105c +#define MACS2R 0x011078 +#define MACCGSPSETR 0x011084 +#define SPCNGRSN BIT(31) + +/* R-Car H1 PHY */ +#define H1_PCIEPHYADRR 0x04000c +#define WRITE_CMD BIT(16) +#define PHY_ACK BIT(24) +#define RATE_POS 12 +#define LANE_POS 8 +#define ADR_POS 0 +#define H1_PCIEPHYDOUTR 0x040014 + +/* R-Car Gen2 PHY */ +#define GEN2_PCIEPHYADDR 0x780 +#define GEN2_PCIEPHYDATA 0x784 +#define GEN2_PCIEPHYCTRL 0x78c + +#define INT_PCI_MSI_NR 32 + +#define RCONF(x) (PCICONF(0) + (x)) +#define RPMCAP(x) (PMCAP(0) + (x)) +#define REXPCAP(x) (EXPCAP(0) + (x)) +#define RVCCAP(x) (VCCAP(0) + (x)) + +#define PCIE_CONF_BUS(b) (((b) & 0xff) << 24) +#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 19) +#define PCIE_CONF_FUNC(f) (((f) & 0x7) << 16) + +#define RCAR_PCI_MAX_RESOURCES 4 +#define MAX_NR_INBOUND_MAPS 6 + +enum { + RCAR_PCI_ACCESS_READ, + RCAR_PCI_ACCESS_WRITE, +}; + +void rcar_pci_write_reg(void __iomem *base, u32 val, unsigned int reg); +u32 rcar_pci_read_reg(void __iomem *base, unsigned int reg); +void rcar_rmw32(void __iomem *base, int where, u32 mask, u32 data); +int rcar_pcie_wait_for_phyrdy(void __iomem *base); +int rcar_pcie_wait_for_dl(void __iomem *base); +void rcar_pcie_set_outbound(int win, void __iomem *base, struct resource *res); +void rcar_pcie_set_inbound(void __iomem *base, u64 cpu_addr, u64 pci_addr, + u64 mask, int idx, bool host); + +#endif