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-rw-r--r--arch/arm/mach-tegra/pcie.c886
1 files changed, 0 insertions, 886 deletions
diff --git a/arch/arm/mach-tegra/pcie.c b/arch/arm/mach-tegra/pcie.c
deleted file mode 100644
index 46144a19a7e7..000000000000
--- 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;
-}