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authorThierry Reding <thierry.reding@avionic-design.de>2013-08-09 16:49:19 +0200
committerStephen Warren <swarren@nvidia.com>2013-08-13 12:07:45 -0600
commitd1523b52bff35ea709141abac87dd701559ef290 (patch)
treebc60d26ee1b80ef445e6b3d8ae5546ff4d774ab7 /arch/arm/mach-tegra
parent734a0f6bb93d6f2c27a2b2976e9da1e31905facd (diff)
downloadop-kernel-dev-d1523b52bff35ea709141abac87dd701559ef290.zip
op-kernel-dev-d1523b52bff35ea709141abac87dd701559ef290.tar.gz
PCI: tegra: Move PCIe driver to drivers/pci/host
Move the PCIe driver from arch/arm/mach-tegra into the drivers/pci/host directory. The motivation is to collect various host controller drivers in the same location in order to facilitate refactoring. The Tegra PCIe driver has been largely rewritten, both in order to turn it into a proper platform driver and to add MSI (based on code by Krishna Kishore <kthota@nvidia.com>) as well as device tree support. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> [swarren, split DT changes into a separate patch in another branch] Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra')
-rw-r--r--arch/arm/mach-tegra/Kconfig7
-rw-r--r--arch/arm/mach-tegra/Makefile3
-rw-r--r--arch/arm/mach-tegra/board-harmony-pcie.c89
-rw-r--r--arch/arm/mach-tegra/board.h8
-rw-r--r--arch/arm/mach-tegra/iomap.h3
-rw-r--r--arch/arm/mach-tegra/pcie.c886
-rw-r--r--arch/arm/mach-tegra/tegra.c24
7 files changed, 2 insertions, 1018 deletions
diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index e963db2..def0564 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/arch/arm/mach-tegra/Kconfig
@@ -21,6 +21,8 @@ config ARCH_TEGRA
select USB_ULPI if USB_PHY
select USB_ULPI_VIEWPORT if USB_PHY
select USE_OF
+ select MIGHT_HAVE_PCI
+ select ARCH_SUPPORTS_MSI
help
This enables support for NVIDIA Tegra based systems.
@@ -60,11 +62,6 @@ config ARCH_TEGRA_114_SOC
Support for NVIDIA Tegra T114 processor family, based on the
ARM CortexA15MP CPU
-config TEGRA_PCI
- bool "PCI Express support"
- depends on ARCH_TEGRA_2x_SOC
- select PCI
-
config TEGRA_AHB
bool "Enable AHB driver for NVIDIA Tegra SoCs"
default y
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index f4e7063..e7e5f45 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -29,7 +29,6 @@ obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += cpuidle-tegra30.o
endif
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
-obj-$(CONFIG_TEGRA_PCI) += pcie.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += tegra114_speedo.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += sleep-tegra30.o
@@ -38,6 +37,4 @@ ifeq ($(CONFIG_CPU_IDLE),y)
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += cpuidle-tegra114.o
endif
-obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += board-harmony-pcie.o
-
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += board-paz00.o
diff --git a/arch/arm/mach-tegra/board-harmony-pcie.c b/arch/arm/mach-tegra/board-harmony-pcie.c
deleted file mode 100644
index 035b240..0000000
--- a/arch/arm/mach-tegra/board-harmony-pcie.c
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * arch/arm/mach-tegra/board-harmony-pcie.c
- *
- * Copyright (C) 2010 CompuLab, Ltd.
- * Mike Rapoport <mike@compulab.co.il>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/gpio.h>
-#include <linux/err.h>
-#include <linux/of_gpio.h>
-#include <linux/regulator/consumer.h>
-
-#include <asm/mach-types.h>
-
-#include "board.h"
-
-#ifdef CONFIG_TEGRA_PCI
-
-int __init harmony_pcie_init(void)
-{
- struct device_node *np;
- int en_vdd_1v05;
- struct regulator *regulator = NULL;
- int err;
-
- np = of_find_node_by_path("/regulators/regulator@3");
- if (!np) {
- pr_err("%s: of_find_node_by_path failed\n", __func__);
- return -ENODEV;
- }
-
- en_vdd_1v05 = of_get_named_gpio(np, "gpio", 0);
- if (en_vdd_1v05 < 0) {
- pr_err("%s: of_get_named_gpio failed: %d\n", __func__,
- en_vdd_1v05);
- return en_vdd_1v05;
- }
-
- err = gpio_request(en_vdd_1v05, "EN_VDD_1V05");
- if (err) {
- pr_err("%s: gpio_request failed: %d\n", __func__, err);
- return err;
- }
-
- gpio_direction_output(en_vdd_1v05, 1);
-
- regulator = regulator_get(NULL, "vdd_ldo0,vddio_pex_clk");
- if (IS_ERR(regulator)) {
- err = PTR_ERR(regulator);
- pr_err("%s: regulator_get failed: %d\n", __func__, err);
- goto err_reg;
- }
-
- err = regulator_enable(regulator);
- if (err) {
- pr_err("%s: regulator_enable failed: %d\n", __func__, err);
- goto err_en;
- }
-
- err = tegra_pcie_init(true, true);
- if (err) {
- pr_err("%s: tegra_pcie_init failed: %d\n", __func__, err);
- goto err_pcie;
- }
-
- return 0;
-
-err_pcie:
- regulator_disable(regulator);
-err_en:
- regulator_put(regulator);
-err_reg:
- gpio_free(en_vdd_1v05);
-
- return err;
-}
-
-#endif
diff --git a/arch/arm/mach-tegra/board.h b/arch/arm/mach-tegra/board.h
index 9a6659f..db6810d 100644
--- a/arch/arm/mach-tegra/board.h
+++ b/arch/arm/mach-tegra/board.h
@@ -31,7 +31,6 @@ void __init tegra_init_early(void);
void __init tegra_map_common_io(void);
void __init tegra_init_irq(void);
void __init tegra_dt_init_irq(void);
-int __init tegra_pcie_init(bool init_port0, bool init_port1);
void tegra_init_late(void);
@@ -48,13 +47,6 @@ int __init tegra_powergate_debugfs_init(void);
static inline int tegra_powergate_debugfs_init(void) { return 0; }
#endif
-int __init harmony_regulator_init(void);
-#ifdef CONFIG_TEGRA_PCI
-int __init harmony_pcie_init(void);
-#else
-static inline int harmony_pcie_init(void) { return 0; }
-#endif
-
void __init tegra_paz00_wifikill_init(void);
#endif
diff --git a/arch/arm/mach-tegra/iomap.h b/arch/arm/mach-tegra/iomap.h
index aba3629..3f5fa07 100644
--- a/arch/arm/mach-tegra/iomap.h
+++ b/arch/arm/mach-tegra/iomap.h
@@ -286,9 +286,6 @@
#define IO_APB_VIRT IOMEM(0xFE300000)
#define IO_APB_SIZE SZ_1M
-#define TEGRA_PCIE_BASE 0x80000000
-#define TEGRA_PCIE_IO_BASE (TEGRA_PCIE_BASE + SZ_4M)
-
#define IO_TO_VIRT_BETWEEN(p, st, sz) ((p) >= (st) && (p) < ((st) + (sz)))
#define IO_TO_VIRT_XLATE(p, pst, vst) (((p) - (pst) + (vst)))
diff --git a/arch/arm/mach-tegra/pcie.c b/arch/arm/mach-tegra/pcie.c
deleted file mode 100644
index 46144a1..0000000
--- a/arch/arm/mach-tegra/pcie.c
+++ /dev/null
@@ -1,886 +0,0 @@
-/*
- * arch/arm/mach-tegra/pci.c
- *
- * PCIe host controller driver for TEGRA(2) SOCs
- *
- * Copyright (c) 2010, CompuLab, Ltd.
- * Author: Mike Rapoport <mike@compulab.co.il>
- *
- * Based on NVIDIA PCIe driver
- * Copyright (c) 2008-2009, NVIDIA Corporation.
- *
- * Bits taken from arch/arm/mach-dove/pcie.c
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-#include <linux/kernel.h>
-#include <linux/pci.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/export.h>
-#include <linux/clk/tegra.h>
-#include <linux/tegra-powergate.h>
-
-#include <asm/sizes.h>
-#include <asm/mach/pci.h>
-
-#include "board.h"
-#include "iomap.h"
-
-/* Hack - need to parse this from DT */
-#define INT_PCIE_INTR 130
-
-/* register definitions */
-#define AFI_OFFSET 0x3800
-#define PADS_OFFSET 0x3000
-#define RP0_OFFSET 0x0000
-#define RP1_OFFSET 0x1000
-
-#define AFI_AXI_BAR0_SZ 0x00
-#define AFI_AXI_BAR1_SZ 0x04
-#define AFI_AXI_BAR2_SZ 0x08
-#define AFI_AXI_BAR3_SZ 0x0c
-#define AFI_AXI_BAR4_SZ 0x10
-#define AFI_AXI_BAR5_SZ 0x14
-
-#define AFI_AXI_BAR0_START 0x18
-#define AFI_AXI_BAR1_START 0x1c
-#define AFI_AXI_BAR2_START 0x20
-#define AFI_AXI_BAR3_START 0x24
-#define AFI_AXI_BAR4_START 0x28
-#define AFI_AXI_BAR5_START 0x2c
-
-#define AFI_FPCI_BAR0 0x30
-#define AFI_FPCI_BAR1 0x34
-#define AFI_FPCI_BAR2 0x38
-#define AFI_FPCI_BAR3 0x3c
-#define AFI_FPCI_BAR4 0x40
-#define AFI_FPCI_BAR5 0x44
-
-#define AFI_CACHE_BAR0_SZ 0x48
-#define AFI_CACHE_BAR0_ST 0x4c
-#define AFI_CACHE_BAR1_SZ 0x50
-#define AFI_CACHE_BAR1_ST 0x54
-
-#define AFI_MSI_BAR_SZ 0x60
-#define AFI_MSI_FPCI_BAR_ST 0x64
-#define AFI_MSI_AXI_BAR_ST 0x68
-
-#define AFI_CONFIGURATION 0xac
-#define AFI_CONFIGURATION_EN_FPCI (1 << 0)
-
-#define AFI_FPCI_ERROR_MASKS 0xb0
-
-#define AFI_INTR_MASK 0xb4
-#define AFI_INTR_MASK_INT_MASK (1 << 0)
-#define AFI_INTR_MASK_MSI_MASK (1 << 8)
-
-#define AFI_INTR_CODE 0xb8
-#define AFI_INTR_CODE_MASK 0xf
-#define AFI_INTR_MASTER_ABORT 4
-#define AFI_INTR_LEGACY 6
-
-#define AFI_INTR_SIGNATURE 0xbc
-#define AFI_SM_INTR_ENABLE 0xc4
-
-#define AFI_AFI_INTR_ENABLE 0xc8
-#define AFI_INTR_EN_INI_SLVERR (1 << 0)
-#define AFI_INTR_EN_INI_DECERR (1 << 1)
-#define AFI_INTR_EN_TGT_SLVERR (1 << 2)
-#define AFI_INTR_EN_TGT_DECERR (1 << 3)
-#define AFI_INTR_EN_TGT_WRERR (1 << 4)
-#define AFI_INTR_EN_DFPCI_DECERR (1 << 5)
-#define AFI_INTR_EN_AXI_DECERR (1 << 6)
-#define AFI_INTR_EN_FPCI_TIMEOUT (1 << 7)
-
-#define AFI_PCIE_CONFIG 0x0f8
-#define AFI_PCIE_CONFIG_PCIEC0_DISABLE_DEVICE (1 << 1)
-#define AFI_PCIE_CONFIG_PCIEC1_DISABLE_DEVICE (1 << 2)
-#define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_MASK (0xf << 20)
-#define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_SINGLE (0x0 << 20)
-#define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_DUAL (0x1 << 20)
-
-#define AFI_FUSE 0x104
-#define AFI_FUSE_PCIE_T0_GEN2_DIS (1 << 2)
-
-#define AFI_PEX0_CTRL 0x110
-#define AFI_PEX1_CTRL 0x118
-#define AFI_PEX_CTRL_RST (1 << 0)
-#define AFI_PEX_CTRL_REFCLK_EN (1 << 3)
-
-#define RP_VEND_XP 0x00000F00
-#define RP_VEND_XP_DL_UP (1 << 30)
-
-#define RP_LINK_CONTROL_STATUS 0x00000090
-#define RP_LINK_CONTROL_STATUS_LINKSTAT_MASK 0x3fff0000
-
-#define PADS_CTL_SEL 0x0000009C
-
-#define PADS_CTL 0x000000A0
-#define PADS_CTL_IDDQ_1L (1 << 0)
-#define PADS_CTL_TX_DATA_EN_1L (1 << 6)
-#define PADS_CTL_RX_DATA_EN_1L (1 << 10)
-
-#define PADS_PLL_CTL 0x000000B8
-#define PADS_PLL_CTL_RST_B4SM (1 << 1)
-#define PADS_PLL_CTL_LOCKDET (1 << 8)
-#define PADS_PLL_CTL_REFCLK_MASK (0x3 << 16)
-#define PADS_PLL_CTL_REFCLK_INTERNAL_CML (0 << 16)
-#define PADS_PLL_CTL_REFCLK_INTERNAL_CMOS (1 << 16)
-#define PADS_PLL_CTL_REFCLK_EXTERNAL (2 << 16)
-#define PADS_PLL_CTL_TXCLKREF_MASK (0x1 << 20)
-#define PADS_PLL_CTL_TXCLKREF_DIV10 (0 << 20)
-#define PADS_PLL_CTL_TXCLKREF_DIV5 (1 << 20)
-
-/* PMC access is required for PCIE xclk (un)clamping */
-#define PMC_SCRATCH42 0x144
-#define PMC_SCRATCH42_PCX_CLAMP (1 << 0)
-
-static void __iomem *reg_pmc_base = IO_ADDRESS(TEGRA_PMC_BASE);
-
-#define pmc_writel(value, reg) \
- __raw_writel(value, reg_pmc_base + (reg))
-#define pmc_readl(reg) \
- __raw_readl(reg_pmc_base + (reg))
-
-/*
- * Tegra2 defines 1GB in the AXI address map for PCIe.
- *
- * That address space is split into different regions, with sizes and
- * offsets as follows:
- *
- * 0x80000000 - 0x80003fff - PCI controller registers
- * 0x80004000 - 0x80103fff - PCI configuration space
- * 0x80104000 - 0x80203fff - PCI extended configuration space
- * 0x80203fff - 0x803fffff - unused
- * 0x80400000 - 0x8040ffff - downstream IO
- * 0x80410000 - 0x8fffffff - unused
- * 0x90000000 - 0x9fffffff - non-prefetchable memory
- * 0xa0000000 - 0xbfffffff - prefetchable memory
- */
-#define PCIE_REGS_SZ SZ_16K
-#define PCIE_CFG_OFF PCIE_REGS_SZ
-#define PCIE_CFG_SZ SZ_1M
-#define PCIE_EXT_CFG_OFF (PCIE_CFG_SZ + PCIE_CFG_OFF)
-#define PCIE_EXT_CFG_SZ SZ_1M
-#define PCIE_IOMAP_SZ (PCIE_REGS_SZ + PCIE_CFG_SZ + PCIE_EXT_CFG_SZ)
-
-#define MEM_BASE_0 (TEGRA_PCIE_BASE + SZ_256M)
-#define MEM_SIZE_0 SZ_128M
-#define MEM_BASE_1 (MEM_BASE_0 + MEM_SIZE_0)
-#define MEM_SIZE_1 SZ_128M
-#define PREFETCH_MEM_BASE_0 (MEM_BASE_1 + MEM_SIZE_1)
-#define PREFETCH_MEM_SIZE_0 SZ_128M
-#define PREFETCH_MEM_BASE_1 (PREFETCH_MEM_BASE_0 + PREFETCH_MEM_SIZE_0)
-#define PREFETCH_MEM_SIZE_1 SZ_128M
-
-#define PCIE_CONF_BUS(b) ((b) << 16)
-#define PCIE_CONF_DEV(d) ((d) << 11)
-#define PCIE_CONF_FUNC(f) ((f) << 8)
-#define PCIE_CONF_REG(r) \
- (((r) & ~0x3) | (((r) < 256) ? PCIE_CFG_OFF : PCIE_EXT_CFG_OFF))
-
-struct tegra_pcie_port {
- int index;
- u8 root_bus_nr;
- void __iomem *base;
-
- bool link_up;
-
- char mem_space_name[16];
- char prefetch_space_name[20];
- struct resource res[2];
-};
-
-struct tegra_pcie_info {
- struct tegra_pcie_port port[2];
- int num_ports;
-
- void __iomem *regs;
- struct resource res_mmio;
-
- struct clk *pex_clk;
- struct clk *afi_clk;
- struct clk *pcie_xclk;
- struct clk *pll_e;
-};
-
-static struct tegra_pcie_info tegra_pcie;
-
-static inline void afi_writel(u32 value, unsigned long offset)
-{
- writel(value, offset + AFI_OFFSET + tegra_pcie.regs);
-}
-
-static inline u32 afi_readl(unsigned long offset)
-{
- return readl(offset + AFI_OFFSET + tegra_pcie.regs);
-}
-
-static inline void pads_writel(u32 value, unsigned long offset)
-{
- writel(value, offset + PADS_OFFSET + tegra_pcie.regs);
-}
-
-static inline u32 pads_readl(unsigned long offset)
-{
- return readl(offset + PADS_OFFSET + tegra_pcie.regs);
-}
-
-static struct tegra_pcie_port *bus_to_port(int bus)
-{
- int i;
-
- for (i = tegra_pcie.num_ports - 1; i >= 0; i--) {
- int rbus = tegra_pcie.port[i].root_bus_nr;
- if (rbus != -1 && rbus == bus)
- break;
- }
-
- return i >= 0 ? tegra_pcie.port + i : NULL;
-}
-
-static int tegra_pcie_read_conf(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 *val)
-{
- struct tegra_pcie_port *pp = bus_to_port(bus->number);
- void __iomem *addr;
-
- if (pp) {
- if (devfn != 0) {
- *val = 0xffffffff;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
-
- addr = pp->base + (where & ~0x3);
- } else {
- addr = tegra_pcie.regs + (PCIE_CONF_BUS(bus->number) +
- PCIE_CONF_DEV(PCI_SLOT(devfn)) +
- PCIE_CONF_FUNC(PCI_FUNC(devfn)) +
- PCIE_CONF_REG(where));
- }
-
- *val = readl(addr);
-
- if (size == 1)
- *val = (*val >> (8 * (where & 3))) & 0xff;
- else if (size == 2)
- *val = (*val >> (8 * (where & 3))) & 0xffff;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int tegra_pcie_write_conf(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 val)
-{
- struct tegra_pcie_port *pp = bus_to_port(bus->number);
- void __iomem *addr;
-
- u32 mask;
- u32 tmp;
-
- if (pp) {
- if (devfn != 0)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- addr = pp->base + (where & ~0x3);
- } else {
- addr = tegra_pcie.regs + (PCIE_CONF_BUS(bus->number) +
- PCIE_CONF_DEV(PCI_SLOT(devfn)) +
- PCIE_CONF_FUNC(PCI_FUNC(devfn)) +
- PCIE_CONF_REG(where));
- }
-
- if (size == 4) {
- writel(val, addr);
- return PCIBIOS_SUCCESSFUL;
- }
-
- if (size == 2)
- mask = ~(0xffff << ((where & 0x3) * 8));
- else if (size == 1)
- mask = ~(0xff << ((where & 0x3) * 8));
- else
- return PCIBIOS_BAD_REGISTER_NUMBER;
-
- tmp = readl(addr) & mask;
- tmp |= val << ((where & 0x3) * 8);
- writel(tmp, addr);
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static struct pci_ops tegra_pcie_ops = {
- .read = tegra_pcie_read_conf,
- .write = tegra_pcie_write_conf,
-};
-
-static void tegra_pcie_fixup_bridge(struct pci_dev *dev)
-{
- u16 reg;
-
- if ((dev->class >> 16) == PCI_BASE_CLASS_BRIDGE) {
- pci_read_config_word(dev, PCI_COMMAND, &reg);
- reg |= (PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
- PCI_COMMAND_MASTER | PCI_COMMAND_SERR);
- pci_write_config_word(dev, PCI_COMMAND, reg);
- }
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, tegra_pcie_fixup_bridge);
-
-/* Tegra PCIE root complex wrongly reports device class */
-static void tegra_pcie_fixup_class(struct pci_dev *dev)
-{
- dev->class = PCI_CLASS_BRIDGE_PCI << 8;
-}
-DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0bf0, tegra_pcie_fixup_class);
-DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0bf1, tegra_pcie_fixup_class);
-
-/* Tegra PCIE requires relaxed ordering */
-static void tegra_pcie_relax_enable(struct pci_dev *dev)
-{
- pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_RELAX_EN);
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, tegra_pcie_relax_enable);
-
-static int tegra_pcie_setup(int nr, struct pci_sys_data *sys)
-{
- struct tegra_pcie_port *pp;
-
- if (nr >= tegra_pcie.num_ports)
- return 0;
-
- pp = tegra_pcie.port + nr;
- pp->root_bus_nr = sys->busnr;
-
- pci_ioremap_io(nr * SZ_64K, TEGRA_PCIE_IO_BASE);
-
- /*
- * IORESOURCE_MEM
- */
- snprintf(pp->mem_space_name, sizeof(pp->mem_space_name),
- "PCIe %d MEM", pp->index);
- pp->mem_space_name[sizeof(pp->mem_space_name) - 1] = 0;
- pp->res[0].name = pp->mem_space_name;
- if (pp->index == 0) {
- pp->res[0].start = MEM_BASE_0;
- pp->res[0].end = pp->res[0].start + MEM_SIZE_0 - 1;
- } else {
- pp->res[0].start = MEM_BASE_1;
- pp->res[0].end = pp->res[0].start + MEM_SIZE_1 - 1;
- }
- pp->res[0].flags = IORESOURCE_MEM;
- if (request_resource(&iomem_resource, &pp->res[0]))
- panic("Request PCIe Memory resource failed\n");
- pci_add_resource_offset(&sys->resources, &pp->res[0], sys->mem_offset);
-
- /*
- * IORESOURCE_MEM | IORESOURCE_PREFETCH
- */
- snprintf(pp->prefetch_space_name, sizeof(pp->prefetch_space_name),
- "PCIe %d PREFETCH MEM", pp->index);
- pp->prefetch_space_name[sizeof(pp->prefetch_space_name) - 1] = 0;
- pp->res[1].name = pp->prefetch_space_name;
- if (pp->index == 0) {
- pp->res[1].start = PREFETCH_MEM_BASE_0;
- pp->res[1].end = pp->res[1].start + PREFETCH_MEM_SIZE_0 - 1;
- } else {
- pp->res[1].start = PREFETCH_MEM_BASE_1;
- pp->res[1].end = pp->res[1].start + PREFETCH_MEM_SIZE_1 - 1;
- }
- pp->res[1].flags = IORESOURCE_MEM | IORESOURCE_PREFETCH;
- if (request_resource(&iomem_resource, &pp->res[1]))
- panic("Request PCIe Prefetch Memory resource failed\n");
- pci_add_resource_offset(&sys->resources, &pp->res[1], sys->mem_offset);
-
- return 1;
-}
-
-static int tegra_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
-{
- return INT_PCIE_INTR;
-}
-
-static struct pci_bus __init *tegra_pcie_scan_bus(int nr,
- struct pci_sys_data *sys)
-{
- struct tegra_pcie_port *pp;
-
- if (nr >= tegra_pcie.num_ports)
- return NULL;
-
- pp = tegra_pcie.port + nr;
- pp->root_bus_nr = sys->busnr;
-
- return pci_scan_root_bus(NULL, sys->busnr, &tegra_pcie_ops, sys,
- &sys->resources);
-}
-
-static struct hw_pci tegra_pcie_hw __initdata = {
- .nr_controllers = 2,
- .setup = tegra_pcie_setup,
- .scan = tegra_pcie_scan_bus,
- .map_irq = tegra_pcie_map_irq,
-};
-
-
-static irqreturn_t tegra_pcie_isr(int irq, void *arg)
-{
- const char *err_msg[] = {
- "Unknown",
- "AXI slave error",
- "AXI decode error",
- "Target abort",
- "Master abort",
- "Invalid write",
- "Response decoding error",
- "AXI response decoding error",
- "Transcation timeout",
- };
-
- u32 code, signature;
-
- code = afi_readl(AFI_INTR_CODE) & AFI_INTR_CODE_MASK;
- signature = afi_readl(AFI_INTR_SIGNATURE);
- afi_writel(0, AFI_INTR_CODE);
-
- if (code == AFI_INTR_LEGACY)
- return IRQ_NONE;
-
- if (code >= ARRAY_SIZE(err_msg))
- code = 0;
-
- /*
- * do not pollute kernel log with master abort reports since they
- * happen a lot during enumeration
- */
- if (code == AFI_INTR_MASTER_ABORT)
- pr_debug("PCIE: %s, signature: %08x\n", err_msg[code], signature);
- else
- pr_err("PCIE: %s, signature: %08x\n", err_msg[code], signature);
-
- return IRQ_HANDLED;
-}
-
-static void tegra_pcie_setup_translations(void)
-{
- u32 fpci_bar;
- u32 size;
- u32 axi_address;
-
- /* Bar 0: config Bar */
- fpci_bar = ((u32)0xfdff << 16);
- size = PCIE_CFG_SZ;
- axi_address = TEGRA_PCIE_BASE + PCIE_CFG_OFF;
- afi_writel(axi_address, AFI_AXI_BAR0_START);
- afi_writel(size >> 12, AFI_AXI_BAR0_SZ);
- afi_writel(fpci_bar, AFI_FPCI_BAR0);
-
- /* Bar 1: extended config Bar */
- fpci_bar = ((u32)0xfe1 << 20);
- size = PCIE_EXT_CFG_SZ;
- axi_address = TEGRA_PCIE_BASE + PCIE_EXT_CFG_OFF;
- afi_writel(axi_address, AFI_AXI_BAR1_START);
- afi_writel(size >> 12, AFI_AXI_BAR1_SZ);
- afi_writel(fpci_bar, AFI_FPCI_BAR1);
-
- /* Bar 2: downstream IO bar */
- fpci_bar = ((__u32)0xfdfc << 16);
- size = SZ_128K;
- axi_address = TEGRA_PCIE_IO_BASE;
- afi_writel(axi_address, AFI_AXI_BAR2_START);
- afi_writel(size >> 12, AFI_AXI_BAR2_SZ);
- afi_writel(fpci_bar, AFI_FPCI_BAR2);
-
- /* Bar 3: prefetchable memory BAR */
- fpci_bar = (((PREFETCH_MEM_BASE_0 >> 12) & 0x0fffffff) << 4) | 0x1;
- size = PREFETCH_MEM_SIZE_0 + PREFETCH_MEM_SIZE_1;
- axi_address = PREFETCH_MEM_BASE_0;
- afi_writel(axi_address, AFI_AXI_BAR3_START);
- afi_writel(size >> 12, AFI_AXI_BAR3_SZ);
- afi_writel(fpci_bar, AFI_FPCI_BAR3);
-
- /* Bar 4: non prefetchable memory BAR */
- fpci_bar = (((MEM_BASE_0 >> 12) & 0x0FFFFFFF) << 4) | 0x1;
- size = MEM_SIZE_0 + MEM_SIZE_1;
- axi_address = MEM_BASE_0;
- afi_writel(axi_address, AFI_AXI_BAR4_START);
- afi_writel(size >> 12, AFI_AXI_BAR4_SZ);
- afi_writel(fpci_bar, AFI_FPCI_BAR4);
-
- /* Bar 5: NULL out the remaining BAR as it is not used */
- fpci_bar = 0;
- size = 0;
- axi_address = 0;
- afi_writel(axi_address, AFI_AXI_BAR5_START);
- afi_writel(size >> 12, AFI_AXI_BAR5_SZ);
- afi_writel(fpci_bar, AFI_FPCI_BAR5);
-
- /* map all upstream transactions as uncached */
- afi_writel(PHYS_OFFSET, AFI_CACHE_BAR0_ST);
- afi_writel(0, AFI_CACHE_BAR0_SZ);
- afi_writel(0, AFI_CACHE_BAR1_ST);
- afi_writel(0, AFI_CACHE_BAR1_SZ);
-
- /* No MSI */
- afi_writel(0, AFI_MSI_FPCI_BAR_ST);
- afi_writel(0, AFI_MSI_BAR_SZ);
- afi_writel(0, AFI_MSI_AXI_BAR_ST);
- afi_writel(0, AFI_MSI_BAR_SZ);
-}
-
-static int tegra_pcie_enable_controller(void)
-{
- u32 val, reg;
- int i, timeout;
-
- /* Enable slot clock and pulse the reset signals */
- for (i = 0, reg = AFI_PEX0_CTRL; i < 2; i++, reg += 0x8) {
- val = afi_readl(reg) | AFI_PEX_CTRL_REFCLK_EN;
- afi_writel(val, reg);
- val &= ~AFI_PEX_CTRL_RST;
- afi_writel(val, reg);
-
- val = afi_readl(reg) | AFI_PEX_CTRL_RST;
- afi_writel(val, reg);
- }
-
- /* Enable dual controller and both ports */
- val = afi_readl(AFI_PCIE_CONFIG);
- val &= ~(AFI_PCIE_CONFIG_PCIEC0_DISABLE_DEVICE |
- AFI_PCIE_CONFIG_PCIEC1_DISABLE_DEVICE |
- AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_MASK);
- val |= AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_DUAL;
- afi_writel(val, AFI_PCIE_CONFIG);
-
- val = afi_readl(AFI_FUSE) & ~AFI_FUSE_PCIE_T0_GEN2_DIS;
- afi_writel(val, AFI_FUSE);
-
- /* Initialze internal PHY, enable up to 16 PCIE lanes */
- pads_writel(0x0, PADS_CTL_SEL);
-
- /* override IDDQ to 1 on all 4 lanes */
- val = pads_readl(PADS_CTL) | PADS_CTL_IDDQ_1L;
- pads_writel(val, PADS_CTL);
-
- /*
- * set up PHY PLL inputs select PLLE output as refclock,
- * set TX ref sel to div10 (not div5)
- */
- val = pads_readl(PADS_PLL_CTL);
- val &= ~(PADS_PLL_CTL_REFCLK_MASK | PADS_PLL_CTL_TXCLKREF_MASK);
- val |= (PADS_PLL_CTL_REFCLK_INTERNAL_CML | PADS_PLL_CTL_TXCLKREF_DIV10);
- pads_writel(val, PADS_PLL_CTL);
-
- /* take PLL out of reset */
- val = pads_readl(PADS_PLL_CTL) | PADS_PLL_CTL_RST_B4SM;
- pads_writel(val, PADS_PLL_CTL);
-
- /*
- * Hack, set the clock voltage to the DEFAULT provided by hw folks.
- * This doesn't exist in the documentation
- */
- pads_writel(0xfa5cfa5c, 0xc8);
-
- /* Wait for the PLL to lock */
- timeout = 300;
- do {
- val = pads_readl(PADS_PLL_CTL);
- usleep_range(1000, 1000);
- if (--timeout == 0) {
- pr_err("Tegra PCIe error: timeout waiting for PLL\n");
- return -EBUSY;
- }
- } while (!(val & PADS_PLL_CTL_LOCKDET));
-
- /* turn off IDDQ override */
- val = pads_readl(PADS_CTL) & ~PADS_CTL_IDDQ_1L;
- pads_writel(val, PADS_CTL);
-
- /* enable TX/RX data */
- val = pads_readl(PADS_CTL);
- val |= (PADS_CTL_TX_DATA_EN_1L | PADS_CTL_RX_DATA_EN_1L);
- pads_writel(val, PADS_CTL);
-
- /* Take the PCIe interface module out of reset */
- tegra_periph_reset_deassert(tegra_pcie.pcie_xclk);
-
- /* Finally enable PCIe */
- val = afi_readl(AFI_CONFIGURATION) | AFI_CONFIGURATION_EN_FPCI;
- afi_writel(val, AFI_CONFIGURATION);
-
- val = (AFI_INTR_EN_INI_SLVERR | AFI_INTR_EN_INI_DECERR |
- AFI_INTR_EN_TGT_SLVERR | AFI_INTR_EN_TGT_DECERR |
- AFI_INTR_EN_TGT_WRERR | AFI_INTR_EN_DFPCI_DECERR);
- afi_writel(val, AFI_AFI_INTR_ENABLE);
- afi_writel(0xffffffff, AFI_SM_INTR_ENABLE);
-
- /* FIXME: No MSI for now, only INT */
- afi_writel(AFI_INTR_MASK_INT_MASK, AFI_INTR_MASK);
-
- /* Disable all execptions */
- afi_writel(0, AFI_FPCI_ERROR_MASKS);
-
- return 0;
-}
-
-static void tegra_pcie_xclk_clamp(bool clamp)
-{
- u32 reg;
-
- reg = pmc_readl(PMC_SCRATCH42) & ~PMC_SCRATCH42_PCX_CLAMP;
-
- if (clamp)
- reg |= PMC_SCRATCH42_PCX_CLAMP;
-
- pmc_writel(reg, PMC_SCRATCH42);
-}
-
-static void tegra_pcie_power_off(void)
-{
- tegra_periph_reset_assert(tegra_pcie.pcie_xclk);
- tegra_periph_reset_assert(tegra_pcie.afi_clk);
- tegra_periph_reset_assert(tegra_pcie.pex_clk);
-
- tegra_powergate_power_off(TEGRA_POWERGATE_PCIE);
- tegra_pcie_xclk_clamp(true);
-}
-
-static int tegra_pcie_power_regate(void)
-{
- int err;
-
- tegra_pcie_power_off();
-
- tegra_pcie_xclk_clamp(true);
-
- tegra_periph_reset_assert(tegra_pcie.pcie_xclk);
- tegra_periph_reset_assert(tegra_pcie.afi_clk);
-
- err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_PCIE,
- tegra_pcie.pex_clk);
- if (err) {
- pr_err("PCIE: powerup sequence failed: %d\n", err);
- return err;
- }
-
- tegra_periph_reset_deassert(tegra_pcie.afi_clk);
-
- tegra_pcie_xclk_clamp(false);
-
- clk_prepare_enable(tegra_pcie.afi_clk);
- clk_prepare_enable(tegra_pcie.pex_clk);
- return clk_prepare_enable(tegra_pcie.pll_e);
-}
-
-static int tegra_pcie_clocks_get(void)
-{
- int err;
-
- tegra_pcie.pex_clk = clk_get(NULL, "pex");
- if (IS_ERR(tegra_pcie.pex_clk))
- return PTR_ERR(tegra_pcie.pex_clk);
-
- tegra_pcie.afi_clk = clk_get(NULL, "afi");
- if (IS_ERR(tegra_pcie.afi_clk)) {
- err = PTR_ERR(tegra_pcie.afi_clk);
- goto err_afi_clk;
- }
-
- tegra_pcie.pcie_xclk = clk_get(NULL, "pcie_xclk");
- if (IS_ERR(tegra_pcie.pcie_xclk)) {
- err = PTR_ERR(tegra_pcie.pcie_xclk);
- goto err_pcie_xclk;
- }
-
- tegra_pcie.pll_e = clk_get_sys(NULL, "pll_e");
- if (IS_ERR(tegra_pcie.pll_e)) {
- err = PTR_ERR(tegra_pcie.pll_e);
- goto err_pll_e;
- }
-
- return 0;
-
-err_pll_e:
- clk_put(tegra_pcie.pcie_xclk);
-err_pcie_xclk:
- clk_put(tegra_pcie.afi_clk);
-err_afi_clk:
- clk_put(tegra_pcie.pex_clk);
-
- return err;
-}
-
-static void tegra_pcie_clocks_put(void)
-{
- clk_put(tegra_pcie.pll_e);
- clk_put(tegra_pcie.pcie_xclk);
- clk_put(tegra_pcie.afi_clk);
- clk_put(tegra_pcie.pex_clk);
-}
-
-static int __init tegra_pcie_get_resources(void)
-{
- int err;
-
- err = tegra_pcie_clocks_get();
- if (err) {
- pr_err("PCIE: failed to get clocks: %d\n", err);
- return err;
- }
-
- err = tegra_pcie_power_regate();
- if (err) {
- pr_err("PCIE: failed to power up: %d\n", err);
- goto err_pwr_on;
- }
-
- tegra_pcie.regs = ioremap_nocache(TEGRA_PCIE_BASE, PCIE_IOMAP_SZ);
- if (tegra_pcie.regs == NULL) {
- pr_err("PCIE: Failed to map PCI/AFI registers\n");
- err = -ENOMEM;
- goto err_map_reg;
- }
-
- err = request_irq(INT_PCIE_INTR, tegra_pcie_isr,
- IRQF_SHARED, "PCIE", &tegra_pcie);
- if (err) {
- pr_err("PCIE: Failed to register IRQ: %d\n", err);
- goto err_req_io;
- }
- set_irq_flags(INT_PCIE_INTR, IRQF_VALID);
-
- return 0;
-
-err_req_io:
- iounmap(tegra_pcie.regs);
-err_map_reg:
- tegra_pcie_power_off();
-err_pwr_on:
- tegra_pcie_clocks_put();
-
- return err;
-}
-
-/*
- * FIXME: If there are no PCIe cards attached, then calling this function
- * can result in the increase of the bootup time as there are big timeout
- * loops.
- */
-#define TEGRA_PCIE_LINKUP_TIMEOUT 200 /* up to 1.2 seconds */
-static bool tegra_pcie_check_link(struct tegra_pcie_port *pp, int idx,
- u32 reset_reg)
-{
- u32 reg;
- int retries = 3;
- int timeout;
-
- do {
- timeout = TEGRA_PCIE_LINKUP_TIMEOUT;
- while (timeout) {
- reg = readl(pp->base + RP_VEND_XP);
-
- if (reg & RP_VEND_XP_DL_UP)
- break;
-
- mdelay(1);
- timeout--;
- }
-
- if (!timeout) {
- pr_err("PCIE: port %d: link down, retrying\n", idx);
- goto retry;
- }
-
- timeout = TEGRA_PCIE_LINKUP_TIMEOUT;
- while (timeout) {
- reg = readl(pp->base + RP_LINK_CONTROL_STATUS);
-
- if (reg & 0x20000000)
- return true;
-
- mdelay(1);
- timeout--;
- }
-
-retry:
- /* Pulse the PEX reset */
- reg = afi_readl(reset_reg) | AFI_PEX_CTRL_RST;
- afi_writel(reg, reset_reg);
- mdelay(1);
- reg = afi_readl(reset_reg) & ~AFI_PEX_CTRL_RST;
- afi_writel(reg, reset_reg);
-
- retries--;
- } while (retries);
-
- return false;
-}
-
-static void __init tegra_pcie_add_port(int index, u32 offset, u32 reset_reg)
-{
- struct tegra_pcie_port *pp;
-
- pp = tegra_pcie.port + tegra_pcie.num_ports;
-
- pp->index = -1;
- pp->base = tegra_pcie.regs + offset;
- pp->link_up = tegra_pcie_check_link(pp, index, reset_reg);
-
- if (!pp->link_up) {
- pp->base = NULL;
- printk(KERN_INFO "PCIE: port %d: link down, ignoring\n", index);
- return;
- }
-
- tegra_pcie.num_ports++;
- pp->index = index;
- pp->root_bus_nr = -1;
- memset(pp->res, 0, sizeof(pp->res));
-}
-
-int __init tegra_pcie_init(bool init_port0, bool init_port1)
-{
- int err;
-
- if (!(init_port0 || init_port1))
- return -ENODEV;
-
- pcibios_min_mem = 0;
-
- err = tegra_pcie_get_resources();
- if (err)
- return err;
-
- err = tegra_pcie_enable_controller();
- if (err)
- return err;
-
- /* setup the AFI address translations */
- tegra_pcie_setup_translations();
-
- if (init_port0)
- tegra_pcie_add_port(0, RP0_OFFSET, AFI_PEX0_CTRL);
-
- if (init_port1)
- tegra_pcie_add_port(1, RP1_OFFSET, AFI_PEX1_CTRL);
-
- pci_common_init(&tegra_pcie_hw);
-
- return 0;
-}
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index 0d1e412..fe56fca 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -116,28 +116,6 @@ out:
tegra20_auxdata_lookup, parent);
}
-static void __init trimslice_init(void)
-{
-#ifdef CONFIG_TEGRA_PCI
- int ret;
-
- ret = tegra_pcie_init(true, true);
- if (ret)
- pr_err("tegra_pci_init() failed: %d\n", ret);
-#endif
-}
-
-static void __init harmony_init(void)
-{
-#ifdef CONFIG_TEGRA_PCI
- int ret;
-
- ret = harmony_pcie_init();
- if (ret)
- pr_err("harmony_pcie_init() failed: %d\n", ret);
-#endif
-}
-
static void __init paz00_init(void)
{
if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC))
@@ -148,8 +126,6 @@ static struct {
char *machine;
void (*init)(void);
} board_init_funcs[] = {
- { "compulab,trimslice", trimslice_init },
- { "nvidia,harmony", harmony_init },
{ "compal,paz00", paz00_init },
};
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