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-rw-r--r--target/linux/imx6/files-3.10/arch/arm/mach-imx/msi.c156
-rw-r--r--target/linux/imx6/files-3.10/arch/arm/mach-imx/msi.h29
-rw-r--r--target/linux/imx6/files-3.10/arch/arm/mach-imx/pcie.c1037
3 files changed, 0 insertions, 1222 deletions
diff --git a/target/linux/imx6/files-3.10/arch/arm/mach-imx/msi.c b/target/linux/imx6/files-3.10/arch/arm/mach-imx/msi.c
deleted file mode 100644
index 8850eaf6e2..0000000000
--- a/target/linux/imx6/files-3.10/arch/arm/mach-imx/msi.c
+++ /dev/null
@@ -1,156 +0,0 @@
-/*
- * arch/arm/mach-mx6/msi.c
- *
- * PCI MSI support for the imx processor
- *
- * Copyright (c) 2013, Boundary Devices.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope 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., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- */
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/msi.h>
-#include <asm/bitops.h>
-#include <asm/mach/irq.h>
-#include <asm/irq.h>
-#include <linux/irqchip/chained_irq.h>
-
-#include "hardware.h"
-#include "msi.h"
-
-#define IMX_NUM_MSI_IRQS 128
-static DECLARE_BITMAP(msi_irq_in_use, IMX_NUM_MSI_IRQS);
-static int irq_base;
-
-static void imx_msi_handler(unsigned int irq, struct irq_desc *desc)
-{
- int i, j;
- unsigned status;
- struct irq_chip *chip = irq_get_chip(irq);
-
- irq_base = irq_alloc_descs(-1, 0, IMX_NUM_MSI_IRQS, 0);
- if (irq_base < 0) {
- printk(KERN_ERR "%s: could not allocate IRQ numbers\n", __func__);
- return;
- }
-
- chained_irq_enter(chip, desc);
- for (i = 0; i < 8; i++) {
- status = imx_pcie_msi_pending(i);
- while (status) {
- j = __fls(status);
- generic_handle_irq(irq_base + j);
- status &= ~(1 << j);
- }
- irq_base += 32;
- }
- chained_irq_exit(chip, desc);
-}
-
-/*
- * Dynamic irq allocate and deallocation
- */
-int create_irq(void)
-{
- int irq, pos;
-
- do {
- pos = find_first_zero_bit(msi_irq_in_use, IMX_NUM_MSI_IRQS);
- if ((unsigned)pos >= IMX_NUM_MSI_IRQS)
- return -ENOSPC;
- /* test_and_set_bit operates on 32-bits at a time */
- } while (test_and_set_bit(pos, msi_irq_in_use));
-
- irq = irq_base + pos;
- dynamic_irq_init(irq);
- return irq;
-}
-
-void destroy_irq(unsigned int irq)
-{
- int pos = irq - irq_base;
-
- dynamic_irq_cleanup(irq);
- clear_bit(pos, msi_irq_in_use);
-}
-
-void arch_teardown_msi_irq(unsigned int irq)
-{
- destroy_irq(irq);
-}
-
-static void imx_msi_irq_ack(struct irq_data *d)
-{
- return;
-}
-
-static void imx_msi_irq_enable(struct irq_data *d)
-{
- imx_pcie_enable_irq(d->irq - irq_base, 1);
- return unmask_msi_irq(d);
-}
-
-static void imx_msi_irq_disable(struct irq_data *d)
-{
- imx_pcie_enable_irq(d->irq - irq_base, 0);
- return mask_msi_irq(d);
-}
-
-static void imx_msi_irq_mask(struct irq_data *d)
-{
- imx_pcie_mask_irq(d->irq - irq_base, 1);
- return mask_msi_irq(d);
-}
-
-static void imx_msi_irq_unmask(struct irq_data *d)
-{
- imx_pcie_mask_irq(d->irq - irq_base, 0);
- return unmask_msi_irq(d);
-}
-
-static struct irq_chip imx_msi_chip = {
- .name = "PCIe-MSI",
- .irq_ack = imx_msi_irq_ack,
- .irq_enable = imx_msi_irq_enable,
- .irq_disable = imx_msi_irq_disable,
- .irq_mask = imx_msi_irq_mask,
- .irq_unmask = imx_msi_irq_unmask,
-};
-
-int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
-{
- int irq = create_irq();
- struct msi_msg msg;
-
- if (irq < 0)
- return irq;
-
- irq_set_msi_desc(irq, desc);
-
- msg.address_hi = 0x0;
- msg.address_lo = MSI_MATCH_ADDR;
- msg.data = (mxc_cpu_type << 15) | ((irq - irq_base) & 0xff);
-
- write_msi_msg(irq, &msg);
- irq_set_chip_and_handler(irq, &imx_msi_chip, handle_simple_irq);
- set_irq_flags(irq, IRQF_VALID);
- pr_info("%s: %d of %d\n", __func__, irq, NR_IRQS);
- return 0;
-}
-
-void imx_msi_init(void)
-{
- irq_set_chained_handler(MXC_INT_PCIE_0, imx_msi_handler);
-}
diff --git a/target/linux/imx6/files-3.10/arch/arm/mach-imx/msi.h b/target/linux/imx6/files-3.10/arch/arm/mach-imx/msi.h
deleted file mode 100644
index 3f9be01adf..0000000000
--- a/target/linux/imx6/files-3.10/arch/arm/mach-imx/msi.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright (C) 2013 Boundary Devices, Inc. All Rights Reserved.
- *
- * 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.
- */
-
-void imx_pcie_enable_irq(unsigned pos, int set);
-void imx_pcie_mask_irq(unsigned pos, int set);
-unsigned imx_pcie_msi_pending(unsigned index);
-
-#define MSI_MATCH_ADDR 0x10000050
-#define MXC_INT_PCIE_0 152
-#define MXC_INT_PCIE_1 153
-#define MXC_INT_PCIE_2 154
-#define MXC_INT_PCIE_3 155
-
-void imx_msi_init(void);
diff --git a/target/linux/imx6/files-3.10/arch/arm/mach-imx/pcie.c b/target/linux/imx6/files-3.10/arch/arm/mach-imx/pcie.c
deleted file mode 100644
index 44bd560c62..0000000000
--- a/target/linux/imx6/files-3.10/arch/arm/mach-imx/pcie.c
+++ /dev/null
@@ -1,1037 +0,0 @@
-/*
- * arch/arm/mach-imx/pcie.c
- *
- * PCIe host controller driver for IMX6 SOCs
- *
- * Copyright (C) 2012 Freescale Semiconductor, Inc. All Rights Reserved.
- * Copyright (C) 2013 Tim Harvey <tharvey@gateworks.com>
- *
- * 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.
- */
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#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/gpio.h>
-#include <linux/platform_device.h>
-#include <linux/of.h>
-#include <linux/of_platform.h>
-#include <linux/of_address.h>
-#include <linux/of_gpio.h>
-
-#include <asm/signal.h>
-#include <asm/mach/pci.h>
-#include <asm/sizes.h>
-
-#include "msi.h"
-
-/* PCIe Registers */
-#define PCIE_ARB_BASE_ADDR 0x01000000
-#define PCIE_ARB_END_ADDR 0x01FFFFFF
-#define PCIE_RC_IOBLSSR 0x1c
-
-/* Register Definitions */
-#define PRT_LOG_R_BaseAddress 0x700
-
-/* Register DB_R0 */
-/* Debug Register 0 */
-#define DB_R0 (PRT_LOG_R_BaseAddress + 0x28)
-#define DB_R0_RegisterSize 32
-#define DB_R0_RegisterResetValue 0x0
-#define DB_R0_RegisterResetMask 0xFFFFFFFF
-/* End of Register Definition for DB_R0 */
-
-/* Register DB_R1 */
-/* Debug Register 1 */
-#define DB_R1 (PRT_LOG_R_BaseAddress + 0x2c)
-#define DB_R1_RegisterSize 32
-#define DB_R1_RegisterResetValue 0x0
-#define DB_R1_RegisterResetMask 0xFFFFFFFF
-/* End of Register Definition for DB_R1 */
-
-#define PCIE_PL_MSICA 0x820
-#define PCIE_PL_MSICUA 0x824
-#define PCIE_PL_MSIC_INT 0x828
-
-#define MSIC_INT_EN 0x0
-#define MSIC_INT_MASK 0x4
-#define MSIC_INT_STATUS 0x8
-
-#define ATU_R_BaseAddress 0x900
-#define ATU_VIEWPORT_R (ATU_R_BaseAddress + 0x0)
-#define ATU_REGION_CTRL1_R (ATU_R_BaseAddress + 0x4)
-#define ATU_REGION_CTRL2_R (ATU_R_BaseAddress + 0x8)
-#define ATU_REGION_LOWBASE_R (ATU_R_BaseAddress + 0xC)
-#define ATU_REGION_UPBASE_R (ATU_R_BaseAddress + 0x10)
-#define ATU_REGION_LIMIT_ADDR_R (ATU_R_BaseAddress + 0x14)
-#define ATU_REGION_LOW_TRGT_ADDR_R (ATU_R_BaseAddress + 0x18)
-#define ATU_REGION_UP_TRGT_ADDR_R (ATU_R_BaseAddress + 0x1C)
-
-/* IOMUXC */
-#define IOMUXC_GPR_BASE_ADDR 0x020E0000
-#define IOMUXC_GPR1 (imx_pcie.gpr_base + 0x04)
-#define IOMUXC_GPR8 (imx_pcie.gpr_base + 0x20)
-#define IOMUXC_GPR12 (imx_pcie.gpr_base + 0x30)
-/* GPR1: iomuxc_gpr1_pcie_ref_clk_en(iomuxc_gpr1[16]) */
-#define iomuxc_gpr1_pcie_ref_clk_en (1 << 16)
-/* GPR1: iomuxc_gpr1_test_powerdown(iomuxc_gpr1_18) */
-#define iomuxc_gpr1_test_powerdown (1 << 18)
-/* GPR12: iomuxc_gpr12_los_level(iomuxc_gpr12[8:4]) */
-#define iomuxc_gpr12_los_level (0x1F << 4)
-/* GPR12: iomuxc_gpr12_app_ltssm_enable(iomuxc_gpr12[10]) */
-#define iomuxc_gpr12_app_ltssm_enable (1 << 10)
-/* GPR12: iomuxc_gpr12_device_type(iomuxc_gpr12[15:12]) */
-#define iomuxc_gpr12_device_type (0xF << 12)
-/* GPR8: iomuxc_gpr8_tx_deemph_gen1(iomuxc_gpr8[5:0]) */
-#define iomuxc_gpr8_tx_deemph_gen1 (0x3F << 0)
-/* GPR8: iomuxc_gpr8_tx_deemph_gen2_3p5db(iomuxc_gpr8[11:6]) */
-#define iomuxc_gpr8_tx_deemph_gen2_3p5db (0x3F << 6)
-/* GPR8: iomuxc_gpr8_tx_deemph_gen2_6db(iomuxc_gpr8[17:12]) */
-#define iomuxc_gpr8_tx_deemph_gen2_6db (0x3F << 12)
-/* GPR8: iomuxc_gpr8_tx_swing_full(iomuxc_gpr8[24:18]) */
-#define iomuxc_gpr8_tx_swing_full (0x7F << 18)
-/* GPR8: iomuxc_gpr8_tx_swing_low(iomuxc_gpr8[31:25]) */
-#define iomuxc_gpr8_tx_swing_low (0x7F << 25)
-
-/* Registers of PHY */
-/* Register PHY_STS_R */
-/* PHY Status Register */
-#define PHY_STS_R (PRT_LOG_R_BaseAddress + 0x110)
-
-/* Register PHY_CTRL_R */
-/* PHY Control Register */
-#define PHY_CTRL_R (PRT_LOG_R_BaseAddress + 0x114)
-
-#define SSP_CR_SUP_DIG_MPLL_OVRD_IN_LO 0x0011
-/* FIELD: RES_ACK_IN_OVRD [15:15]
-// FIELD: RES_ACK_IN [14:14]
-// FIELD: RES_REQ_IN_OVRD [13:13]
-// FIELD: RES_REQ_IN [12:12]
-// FIELD: RTUNE_REQ_OVRD [11:11]
-// FIELD: RTUNE_REQ [10:10]
-// FIELD: MPLL_MULTIPLIER_OVRD [9:9]
-// FIELD: MPLL_MULTIPLIER [8:2]
-// FIELD: MPLL_EN_OVRD [1:1]
-// FIELD: MPLL_EN [0:0]
-*/
-
-#define SSP_CR_SUP_DIG_ATEOVRD 0x0010
-/* FIELD: ateovrd_en [2:2]
-// FIELD: ref_usb2_en [1:1]
-// FIELD: ref_clkdiv2 [0:0]
-*/
-
-#define SSP_CR_LANE0_DIG_RX_OVRD_IN_LO 0x1005
-/* FIELD: RX_LOS_EN_OVRD [13:13]
-// FIELD: RX_LOS_EN [12:12]
-// FIELD: RX_TERM_EN_OVRD [11:11]
-// FIELD: RX_TERM_EN [10:10]
-// FIELD: RX_BIT_SHIFT_OVRD [9:9]
-// FIELD: RX_BIT_SHIFT [8:8]
-// FIELD: RX_ALIGN_EN_OVRD [7:7]
-// FIELD: RX_ALIGN_EN [6:6]
-// FIELD: RX_DATA_EN_OVRD [5:5]
-// FIELD: RX_DATA_EN [4:4]
-// FIELD: RX_PLL_EN_OVRD [3:3]
-// FIELD: RX_PLL_EN [2:2]
-// FIELD: RX_INVERT_OVRD [1:1]
-// FIELD: RX_INVERT [0:0]
-*/
-
-#define SSP_CR_LANE0_DIG_RX_ASIC_OUT 0x100D
-/* FIELD: LOS [2:2]
-// FIELD: PLL_STATE [1:1]
-// FIELD: VALID [0:0]
-*/
-
-/* control bus bit definition */
-#define PCIE_CR_CTL_DATA_LOC 0
-#define PCIE_CR_CTL_CAP_ADR_LOC 16
-#define PCIE_CR_CTL_CAP_DAT_LOC 17
-#define PCIE_CR_CTL_WR_LOC 18
-#define PCIE_CR_CTL_RD_LOC 19
-#define PCIE_CR_STAT_DATA_LOC 0
-#define PCIE_CR_STAT_ACK_LOC 16
-
-#define PCIE_CAP_STRUC_BaseAddress 0x70
-
-/* Register LNK_CAP */
-/* PCIE Link cap */
-#define LNK_CAP (PCIE_CAP_STRUC_BaseAddress + 0xc)
-
-/* End of Register Definitions */
-
-enum {
- MemRdWr = 0,
- MemRdLk = 1,
- IORdWr = 2,
- CfgRdWr0 = 4,
- CfgRdWr1 = 5
-};
-
-struct imx_pcie_port {
- u8 index;
- u8 root_bus_nr;
- void __iomem *base;
- void __iomem *dbi_base;
- spinlock_t conf_lock;
-
- char io_space_name[16];
- char mem_space_name[16];
-
- struct resource res[2];
- struct clk *clk;
-};
-
-struct imx_pcie_info {
- struct imx_pcie_port imx_pcie_port[1];
- int num_pcie_ports;
-
- void __iomem *base;
- void __iomem *dbi_base;
- void __iomem *gpr_base;
-
- unsigned int pcie_pwr_en;
- unsigned int pcie_rst;
- unsigned int pcie_wake_up;
- unsigned int pcie_dis;
-};
-
-static struct imx_pcie_info imx_pcie;
-
-static int pcie_phy_cr_read(int addr, int *data);
-static int pcie_phy_cr_write(int addr, int data);
-static void change_field(int *in, int start, int end, int val);
-
-/* IMX PCIE GPR configure routines */
-static inline void imx_pcie_clrset(u32 mask, u32 val, void __iomem *addr)
-{
- writel(((readl(addr) & ~mask) | (val & mask)), addr);
-}
-
-static int imx_pcie_setup(int nr, struct pci_sys_data *sys)
-{
- struct imx_pcie_port *pp;
-
- if (nr >= imx_pcie.num_pcie_ports)
- return 0;
-
- pp = &imx_pcie.imx_pcie_port[nr];
- pp->root_bus_nr = sys->busnr;
-
- /*
- * IORESOURCE_IO
- */
- snprintf(pp->io_space_name, sizeof(pp->io_space_name),
- "PCIe %d I/O", pp->index);
- pp->io_space_name[sizeof(pp->io_space_name) - 1] = 0;
- pp->res[0].name = pp->io_space_name;
- if (pp->index == 0) {
- pp->res[0].start = PCIE_ARB_BASE_ADDR;
- pp->res[0].end = pp->res[0].start + SZ_1M - 1;
- }
- pp->res[0].flags = IORESOURCE_IO;
- if (request_resource(&ioport_resource, &pp->res[0]))
- panic("Request PCIe IO resource failed\n");
- pci_add_resource_offset(&sys->resources, &pp->res[0], sys->io_offset);
-
- /*
- * 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[1].name = pp->mem_space_name;
- if (pp->index == 0) {
- pp->res[1].start = PCIE_ARB_BASE_ADDR + SZ_1M;
- pp->res[1].end = pp->res[1].start + SZ_16M - SZ_2M - 1;
- }
- pp->res[1].flags = IORESOURCE_MEM;
- if (request_resource(&iomem_resource, &pp->res[1]))
- panic("Request PCIe Memory resource failed\n");
- pci_add_resource_offset(&sys->resources, &pp->res[1], sys->mem_offset);
-
- return 1;
-}
-
-static int imx_pcie_link_up(void __iomem *dbi_base)
-{
- /* Check the pcie link up or link down */
- int iterations = 200;
- u32 rc, ltssm, rx_valid, temp;
-
- do {
- /* link is debug bit 36 debug 1 start in bit 32 */
- rc = readl(dbi_base + DB_R1) & (0x1 << (36 - 32)) ;
- iterations--;
- usleep_range(2000, 3000);
-
- /* From L0, initiate MAC entry to gen2 if EP/RC supports gen2.
- * Wait 2ms (LTSSM timeout is 24ms, PHY lock is ~5us in gen2).
- * If (MAC/LTSSM.state == Recovery.RcvrLock)
- * && (PHY/rx_valid==0) then pulse PHY/rx_reset. Transition
- * to gen2 is stuck
- */
- pcie_phy_cr_read(SSP_CR_LANE0_DIG_RX_ASIC_OUT, &rx_valid);
- ltssm = readl(dbi_base + DB_R0) & 0x3F;
- if ((ltssm == 0x0D) && ((rx_valid & 0x01) == 0)) {
- pr_info("Transition to gen2 is stuck, reset PHY!\n");
- pcie_phy_cr_read(SSP_CR_LANE0_DIG_RX_OVRD_IN_LO, &temp);
- change_field(&temp, 3, 3, 0x1);
- change_field(&temp, 5, 5, 0x1);
- pcie_phy_cr_write(SSP_CR_LANE0_DIG_RX_OVRD_IN_LO,
- 0x0028);
- usleep_range(2000, 3000);
- pcie_phy_cr_read(SSP_CR_LANE0_DIG_RX_OVRD_IN_LO, &temp);
- change_field(&temp, 3, 3, 0x0);
- change_field(&temp, 5, 5, 0x0);
- pcie_phy_cr_write(SSP_CR_LANE0_DIG_RX_OVRD_IN_LO,
- 0x0000);
- }
-
- if ((iterations < 0))
- pr_info("link up failed, DB_R0:0x%08x, DB_R1:0x%08x!\n"
- , readl(dbi_base + DB_R0)
- , readl(dbi_base + DB_R1));
- } while (!rc && iterations);
-
- if (!rc)
- return 0;
- return 1;
-}
-
-static void imx_pcie_regions_setup(void __iomem *dbi_base)
-{
- unsigned bus;
- unsigned i;
- unsigned untranslated_base = PCIE_ARB_END_ADDR +1 - SZ_1M;
- void __iomem *p = dbi_base + PCIE_PL_MSIC_INT;
- /*
- * i.MX6 defines 16MB in the AXI address map for PCIe.
- *
- * That address space excepted the pcie registers is
- * split and defined into different regions by iATU,
- * with sizes and offsets as follows:
- *
- * 0x0100_0000 --- 0x010F_FFFF 1MB IORESOURCE_IO
- * 0x0110_0000 --- 0x01EF_FFFF 14MB IORESOURCE_MEM
- * 0x01F0_0000 --- 0x01FF_FFFF 1MB Cfg + Registers
- */
-
- /* CMD reg:I/O space, MEM space, and Bus Master Enable */
- writel(readl(dbi_base + PCI_COMMAND)
- | PCI_COMMAND_IO
- | PCI_COMMAND_MEMORY
- | PCI_COMMAND_MASTER,
- dbi_base + PCI_COMMAND);
-
- /* Set the CLASS_REV of RC CFG header to PCI_CLASS_BRIDGE_PCI */
- writel(readl(dbi_base + PCI_CLASS_REVISION)
- | (PCI_CLASS_BRIDGE_PCI << 16),
- dbi_base + PCI_CLASS_REVISION);
-
- /*
- * region0-3 outbound used to access target cfg
- */
- for (bus = 1; bus <= 4; bus++) {
- writel(bus - 1, dbi_base + ATU_VIEWPORT_R);
- writel(untranslated_base, dbi_base + ATU_REGION_LOWBASE_R);
- untranslated_base += (1 << 18);
- if (bus == 4)
- untranslated_base -= (1 << 14); //(remove registers)
- writel(untranslated_base - 1, dbi_base + ATU_REGION_LIMIT_ADDR_R);
- writel(0, dbi_base + ATU_REGION_UPBASE_R);
-
- writel(bus << 24, dbi_base + ATU_REGION_LOW_TRGT_ADDR_R);
- writel(0, dbi_base + ATU_REGION_UP_TRGT_ADDR_R);
- writel((bus > 1) ? CfgRdWr1 : CfgRdWr0,
- dbi_base + ATU_REGION_CTRL1_R);
- writel((1<<31), dbi_base + ATU_REGION_CTRL2_R);
- }
-
- writel(MSI_MATCH_ADDR, dbi_base + PCIE_PL_MSICA);
- writel(0, dbi_base + PCIE_PL_MSICUA);
- for (i = 0; i < 8 ; i++) {
- writel(0, p + MSIC_INT_EN);
- writel(0xffffffff, p + MSIC_INT_MASK);
- writel(0xffffffff, p + MSIC_INT_STATUS);
- p += 12;
- }
-}
-
-void imx_pcie_mask_irq(unsigned pos, int set)
-{
- unsigned mask = 1 << (pos & 0x1f);
- unsigned val, newval;
- void __iomem *p = imx_pcie.dbi_base + PCIE_PL_MSIC_INT + MSIC_INT_MASK + ((pos >> 5) * 12);
- if (pos >= (8 * 32))
- return;
- val = readl(p);
- if (set)
- newval = val | mask;
- else
- newval = val & ~mask;
- if (val != newval)
- writel(newval, p);
-}
-
-void imx_pcie_enable_irq(unsigned pos, int set)
-{
- unsigned mask = 1 << (pos & 0x1f);
- unsigned val, newval;
- void __iomem *p = imx_pcie.dbi_base + PCIE_PL_MSIC_INT + MSIC_INT_EN + ((pos >> 5) * 12);
- if (pos >= (8 * 32))
- return;
- val = readl(p);
- if (set)
- newval = val | mask;
- else
- newval = val & ~mask;
- if (val != newval)
- writel(newval, p);
- if (set && (val != newval))
- imx_pcie_mask_irq(pos, 0); /* unmask when enabled */
-}
-
-unsigned imx_pcie_msi_pending(unsigned index)
-{
- unsigned val, mask;
- void __iomem *p = imx_pcie.dbi_base + PCIE_PL_MSIC_INT + (index * 12);
- if (index >= 8)
- return 0;
- val = readl(p + MSIC_INT_STATUS);
- mask = readl(p + MSIC_INT_MASK);
- val &= ~mask;
- writel(val, p + MSIC_INT_STATUS);
- return val;
-}
-
-static char master_abort(struct pci_bus *bus, u32 devfn, int where)
-{
- u32 reg;
- void __iomem *dbi_base = imx_pcie.dbi_base;
- int ret = 0;
-
- reg = readl(dbi_base + PCIE_RC_IOBLSSR);
- if (reg & 0x71000000) {
- if (reg & 1<<30)
- pr_err("%d:%02d.%d 0x%04x: parity error\n", bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), where);
- if (reg & 1<<29) {
- pr_err("%d:%02d.%d 0x%04x: master abort\n", bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), where);
- ret = 1;
- }
- if (reg & 1<<28)
- pr_err("%d:%02d.%d 0x%04x: target abort\n", bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), where);
- if (reg & 1<<24)
- pr_err("%d:%02d.%d 0x%04x: master data parity error\n", bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), where);
- writel(reg, dbi_base + PCIE_RC_IOBLSSR);
- udelay(1500); // without this delay subsequent reads through bridge can erroneously return 0???
- }
- return ret;
-}
-
-static volatile void *get_cfg_addr(struct pci_bus *bus, u32 devfn, int where)
-{
- unsigned busnum;
- void __iomem *base = imx_pcie.base;
- void __iomem *dbi_base = imx_pcie.dbi_base;
-
- if (!bus->number) {
- if (devfn != 0)
- return 0;
- return (imx_pcie.dbi_base) + (where & 0x0ffc);
- }
- if ((devfn > 0xff) || (bus->number > 15))
- return 0;
- busnum = bus->number - 1;
- if ((busnum < 3) && (devfn <= 3)) {
- return (base) + (busnum << 18) + (devfn << 16) + (where & 0xfffc);
- }
- writel(3, dbi_base + ATU_VIEWPORT_R);
- writel((bus->number << 24) | (devfn << 16),
- dbi_base + ATU_REGION_LOW_TRGT_ADDR_R);
- writel((bus->number > 1) ? CfgRdWr1 : CfgRdWr0,
- dbi_base + ATU_REGION_CTRL1_R);
- return (base) + (3 << 18) + (where & 0xfffc);
-}
-
-static int imx_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
- int size, u32 *val)
-{
- const volatile void *va_address;
- u32 v;
-
- if (0)
- pr_info("%s: bus=%x, devfn=%x, where=%x size=%x\n", __func__, bus->number, devfn, where, size);
- va_address = get_cfg_addr(bus, devfn, where);
- if (!va_address) {
- *val = 0xffffffff;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
- v = readl(va_address);
- if (master_abort(bus, devfn, where)) {
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
- if (0)
- pr_info("%s: bus=%x, devfn=%x, where=%x size=%x v=%x\n", __func__, bus->number, devfn, where, size, v);
- if (size == 4) {
- *val = v;
- } else if (size == 1) {
- *val = (v >> (8 * (where & 3))) & 0xFF;
- } else if (size == 2) {
- *val = (v >> (8 * (where & 3))) & 0xFFFF;
- } else {
- *val = 0xffffffff;
- return PCIBIOS_BAD_REGISTER_NUMBER;
- }
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int imx_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
- int where, int size, u32 val)
-{
- volatile void *va_address;
- u32 mask, tmp;
-
- if (0)
- pr_info("%s: bus=%x, devfn=%x, where=%x size=%x val=%x\n", __func__, bus->number, devfn, where, size, val);
- va_address = get_cfg_addr(bus, devfn, where);
- if (!va_address)
- return PCIBIOS_DEVICE_NOT_FOUND;
- if (size == 4) {
- writel(val, va_address);
- return (master_abort(bus, devfn, where))
- ?PCIBIOS_DEVICE_NOT_FOUND: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(va_address) & mask;
- tmp |= val << ((where & 0x3) * 8);
- writel(tmp, va_address);
- return (master_abort(bus, devfn, where))
- ?PCIBIOS_DEVICE_NOT_FOUND:PCIBIOS_SUCCESSFUL;
-}
-
-static struct pci_ops imx_pcie_ops = {
- .read = imx_pcie_rd_conf,
- .write = imx_pcie_wr_conf,
-};
-
-signed short irq_map[] = {
- -EINVAL,
- MXC_INT_PCIE_3, /* int a */
- MXC_INT_PCIE_2, /* int b */
- MXC_INT_PCIE_1, /* int c */
- MXC_INT_PCIE_0, /* int d/MSI */
-};
-
-static int imx_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
-{
- int val = -EINVAL;
- if (pin <= 4)
- val = irq_map[pin];
- return val;
-}
-
-static struct hw_pci imx_pci __initdata = {
- .nr_controllers = 1,
- .setup = imx_pcie_setup,
- .ops = &imx_pcie_ops,
- .map_irq = imx_pcie_map_irq,
-};
-
-/* PHY CR bus acess routines */
-static int pcie_phy_cr_ack_polling(int max_iterations, int exp_val)
-{
- u32 temp_rd_data, wait_counter = 0;
-
- do {
- temp_rd_data = readl(imx_pcie.dbi_base + PHY_STS_R);
- temp_rd_data = (temp_rd_data >> PCIE_CR_STAT_ACK_LOC) & 0x1;
- wait_counter++;
- } while ((wait_counter < max_iterations) && (temp_rd_data != exp_val));
-
- if (temp_rd_data != exp_val)
- return 0 ;
- return 1 ;
-}
-
-static int pcie_phy_cr_cap_addr(int addr)
-{
- u32 temp_wr_data;
- void __iomem *dbi_base = imx_pcie.dbi_base;
-
- /* write addr */
- temp_wr_data = addr << PCIE_CR_CTL_DATA_LOC ;
- writel(temp_wr_data, dbi_base + PHY_CTRL_R);
-
- /* capture addr */
- temp_wr_data |= (0x1 << PCIE_CR_CTL_CAP_ADR_LOC);
- writel(temp_wr_data, dbi_base + PHY_CTRL_R);
-
- /* wait for ack */
- if (!pcie_phy_cr_ack_polling(100, 1))
- return 0;
-
- /* deassert cap addr */
- temp_wr_data = addr << PCIE_CR_CTL_DATA_LOC;
- writel(temp_wr_data, dbi_base + PHY_CTRL_R);
-
- /* wait for ack de-assetion */
- if (!pcie_phy_cr_ack_polling(100, 0))
- return 0 ;
-
- return 1 ;
-}
-
-static int pcie_phy_cr_read(int addr , int *data)
-{
- u32 temp_rd_data, temp_wr_data;
- void __iomem *dbi_base = imx_pcie.dbi_base;
-
- /* write addr */
- /* cap addr */
- if (!pcie_phy_cr_cap_addr(addr))
- return 0;
-
- /* assert rd signal */
- temp_wr_data = 0x1 << PCIE_CR_CTL_RD_LOC;
- writel(temp_wr_data, dbi_base + PHY_CTRL_R);
-
- /* wait for ack */
- if (!pcie_phy_cr_ack_polling(100, 1))
- return 0;
-
- /* after got ack return data */
- temp_rd_data = readl(dbi_base + PHY_STS_R);
- *data = (temp_rd_data & (0xffff << PCIE_CR_STAT_DATA_LOC)) ;
-
- /* deassert rd signal */
- temp_wr_data = 0x0;
- writel(temp_wr_data, dbi_base + PHY_CTRL_R);
-
- /* wait for ack de-assetion */
- if (!pcie_phy_cr_ack_polling(100, 0))
- return 0 ;
-
- return 1 ;
-
-}
-
-static int pcie_phy_cr_write(int addr, int data)
-{
- u32 temp_wr_data;
- void __iomem *dbi_base = imx_pcie.dbi_base;
-
- /* write addr */
- /* cap addr */
- if (!pcie_phy_cr_cap_addr(addr))
- return 0 ;
-
- temp_wr_data = data << PCIE_CR_CTL_DATA_LOC;
- writel(temp_wr_data, dbi_base + PHY_CTRL_R);
-
- /* capture data */
- temp_wr_data |= (0x1 << PCIE_CR_CTL_CAP_DAT_LOC);
- writel(temp_wr_data, dbi_base + PHY_CTRL_R);
-
- /* wait for ack */
- if (!pcie_phy_cr_ack_polling(100, 1))
- return 0 ;
-
- /* deassert cap data */
- temp_wr_data = data << PCIE_CR_CTL_DATA_LOC;
- writel(temp_wr_data, dbi_base + PHY_CTRL_R);
-
- /* wait for ack de-assetion */
- if (!pcie_phy_cr_ack_polling(100, 0))
- return 0;
-
- /* assert wr signal */
- temp_wr_data = 0x1 << PCIE_CR_CTL_WR_LOC;
- writel(temp_wr_data, dbi_base + PHY_CTRL_R);
-
- /* wait for ack */
- if (!pcie_phy_cr_ack_polling(100, 1))
- return 0;
-
- /* deassert wr signal */
- temp_wr_data = data << PCIE_CR_CTL_DATA_LOC;
- writel(temp_wr_data, dbi_base + PHY_CTRL_R);
-
- /* wait for ack de-assetion */
- if (!pcie_phy_cr_ack_polling(100, 0))
- return 0;
-
- temp_wr_data = 0x0 ;
- writel(temp_wr_data, dbi_base + PHY_CTRL_R);
-
- return 1 ;
-}
-
-static void change_field(int *in, int start, int end, int val)
-{
- int mask;
-
- mask = ((0xFFFFFFFF << start) ^ (0xFFFFFFFF << (end + 1))) & 0xFFFFFFFF;
- *in = (*in & ~mask) | (val << start);
-}
-
-static int imx_pcie_enable_controller(struct device *dev)
-{
- struct clk *clk;
- struct device_node *np = dev->of_node;
-
- if (gpio_is_valid(imx_pcie.pcie_pwr_en)) {
- /* Enable PCIE power */
- gpio_request(imx_pcie.pcie_pwr_en, "PCIE POWER_EN");
-
- /* activate PCIE_PWR_EN */
- gpio_direction_output(imx_pcie.pcie_pwr_en, 1);
- }
-
- // power up PCIe PHY
- imx_pcie_clrset(iomuxc_gpr1_test_powerdown, 0 << 18, IOMUXC_GPR1);
-
- /* enable the clks */
- if (np)
- clk = of_clk_get(np, 0);
- else
- clk = devm_clk_get(dev, "pcie_clk");
- if (IS_ERR(clk)) {
- pr_err("no pcie clock.\n");
- return -EINVAL;
- }
-
- if (clk_prepare_enable(clk)) {
- pr_err("can't enable pcie clock.\n");
- clk_put(clk);
- return -EINVAL;
- }
-
- // Enable PCIe PHY ref clock
- imx_pcie_clrset(iomuxc_gpr1_pcie_ref_clk_en, 1 << 16, IOMUXC_GPR1);
-
- return 0;
-}
-
-static void card_reset(struct device *dev)
-{
- if (gpio_is_valid(imx_pcie.pcie_rst)) {
- /* PCIE RESET */
- gpio_request(imx_pcie.pcie_rst, "PCIE RESET");
-
- /* activate PERST_B */
- gpio_direction_output(imx_pcie.pcie_rst, 0);
-
- /* Add one reset to the pcie external device */
- msleep(100);
-
- /* deactive PERST_B */
- gpio_direction_output(imx_pcie.pcie_rst, 1);
- }
-}
-
-static void add_pcie_port(struct platform_device *pdev, void __iomem *base, void __iomem *dbi_base)
-{
- struct clk *clk;
- struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
-
- if (imx_pcie_link_up(dbi_base)) {
- struct imx_pcie_port *pp = &imx_pcie.imx_pcie_port[imx_pcie.num_pcie_ports++];
-
- pr_info("IMX PCIe port: link up.\n");
-
- pp->index = 0;
- pp->root_bus_nr = -1;
- pp->base = base;
- pp->dbi_base = dbi_base;
- spin_lock_init(&pp->conf_lock);
- memset(pp->res, 0, sizeof(pp->res));
- } else {
- pr_info("IMX PCIe port: link down!\n");
- /* Release the clocks, and disable the power */
-
- if (np)
- clk = of_clk_get(np, 0);
- else
- clk = clk_get(NULL, "pcie_clk");
- if (IS_ERR(clk)) {
- pr_err("no pcie clock.\n");
- return;
- }
-
- clk_disable_unprepare(clk);
- clk_put(clk);
-
- // Disable the PCIE PHY Ref Clock
- imx_pcie_clrset(iomuxc_gpr1_pcie_ref_clk_en, 0 << 16, IOMUXC_GPR1);
-
- if (gpio_is_valid(imx_pcie.pcie_pwr_en)) {
- /* Disable PCIE power */
- gpio_request(imx_pcie.pcie_pwr_en, "PCIE POWER_EN");
-
- /* activate PCIE_PWR_EN */
- gpio_direction_output(imx_pcie.pcie_pwr_en, 0);
- }
-
- // Power down PCIE PHY
- imx_pcie_clrset(iomuxc_gpr1_test_powerdown, 1 << 18, IOMUXC_GPR1);
- }
-}
-
-static int imx_pcie_abort_handler(unsigned long addr, unsigned int fsr,
- struct pt_regs *regs)
-{
- unsigned long instr;
- unsigned long pc = instruction_pointer(regs) - 4;
-
- instr = *(unsigned long *)pc;
-/* imprecise aborts are no longer enabled in 3.7+ during init it would appear.
- * We now using PCIE_RC_IOBLSSR to detect master abort however we will still get
- * at least one imprecise abort and need to have a handler.
- */
-#if 0
- if (instr == 0xf57ff04f) {
- /* dsb sy */
- pc -= 4;
- instr = *(unsigned long *)pc;
- }
- pr_info("PCIe abort: address = 0x%08lx fsr = 0x%03x PC = 0x%08lx LR = 0x%08lx instr=%08lx\n",
- addr, fsr, regs->ARM_pc, regs->ARM_lr, instr);
-
-
- /*
- * If the instruction being executed was a read,
- * make it look like it read all-ones.
- */
- if ((instr & 0x0c500000) == 0x04100000) {
- /* LDR instruction */
- int reg = (instr >> 12) & 15;
-
- regs->uregs[reg] = -1;
- regs->ARM_pc = pc + 4;
- return 0;
- }
- return 1;
-#else
- pr_info("PCIe abort: address = 0x%08lx fsr = 0x%03x PC = 0x%08lx LR = 0x%08lx instr=%08lx\n",
- addr, fsr, regs->ARM_pc, regs->ARM_lr, instr);
-
- return 0;
-#endif
-}
-
-
-static int imx_pcie_pltfm_probe(struct platform_device *pdev)
-{
- struct resource *mem;
- struct device *dev = &pdev->dev;
- struct device_node *np = pdev->dev.of_node;
- struct resource res;
- int ret;
-
- if (!np) {
- dev_err(&pdev->dev, "No of data found\n");
- return -EINVAL;
- }
-
- res.start = res.end = 0;
- ret = of_address_to_resource(np, 0, &res);
- if (ret)
- goto err;
- mem = &res;
- imx_pcie.pcie_pwr_en = of_get_named_gpio(np, "pwren-gpios", 0);
- imx_pcie.pcie_rst = of_get_named_gpio(np, "rst-gpios", 0);
- imx_pcie.pcie_wake_up = of_get_named_gpio(np, "wake-gpios", 0);
- imx_pcie.pcie_dis = of_get_named_gpio(np, "dis-gpios", 0);
- //pdev->dev.platform_data = pdata;
-
- imx_pcie.base = ioremap_nocache(PCIE_ARB_END_ADDR - SZ_1M + 1, SZ_1M - SZ_16K);
- if (!imx_pcie.base) {
- pr_err("error with ioremap in function %s\n", __func__);
- return -EIO;
- }
-
- imx_pcie.dbi_base = devm_ioremap(dev, mem->start, resource_size(mem));
- if (!imx_pcie.dbi_base) {
- dev_err(dev, "can't map %pR\n", mem);
- return -ENOMEM;
- }
-
- np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-iomuxc-gpr");
- if (!np) {
- dev_err(dev, "can't find iomux\n");
- return -ENOMEM;
- }
- ret = of_address_to_resource(np, 0, &res);
- of_node_put(np);
- if (ret)
- goto err;
- mem = &res;
- imx_pcie.gpr_base = devm_ioremap(dev, mem->start, resource_size(mem));
- if (!imx_pcie.gpr_base) {
- dev_err(dev, "can't map %pR\n", mem);
- return -ENOMEM;
- }
-
- // hold LTSSM in detect state
- imx_pcie_clrset(iomuxc_gpr12_app_ltssm_enable, 0 << 10, IOMUXC_GPR12);
-
- /* configure constant input signal to the pcie ctrl and phy */
- // set device type to RC (PCI_EXP_TYPE_ROOT_PORT=4 is from pcie_regs.h)
- imx_pcie_clrset(iomuxc_gpr12_device_type, PCI_EXP_TYPE_ROOT_PORT << 12, IOMUXC_GPR12);
- // loss of signal detect sensitivity function - must be 0x9
- imx_pcie_clrset(iomuxc_gpr12_los_level, 9 << 4, IOMUXC_GPR12);
- // not clear what values these should have from RM
- imx_pcie_clrset(iomuxc_gpr8_tx_deemph_gen1, 0 << 0, IOMUXC_GPR8);
- imx_pcie_clrset(iomuxc_gpr8_tx_deemph_gen2_3p5db, 0 << 6, IOMUXC_GPR8);
- imx_pcie_clrset(iomuxc_gpr8_tx_deemph_gen2_6db, 20 << 12, IOMUXC_GPR8);
- imx_pcie_clrset(iomuxc_gpr8_tx_swing_full, 127 << 18, IOMUXC_GPR8);
- imx_pcie_clrset(iomuxc_gpr8_tx_swing_low, 127 << 25, IOMUXC_GPR8);
-
- /* Enable the pwr, clks and so on */
- ret = imx_pcie_enable_controller(dev);
- if (ret)
- goto err;
-
- /* togle the external card's reset */
- card_reset(dev) ;
-
- usleep_range(3000, 4000);
- imx_pcie_regions_setup(imx_pcie.dbi_base);
- usleep_range(3000, 4000);
-
- /*
- * Force to GEN1 because of PCIE2USB storage stress tests
- * would be failed when GEN2 is enabled
- */
- writel(((readl(imx_pcie.dbi_base + LNK_CAP) & 0xfffffff0) | 0x1),
- imx_pcie.dbi_base + LNK_CAP);
-
- /* start link up */
- imx_pcie_clrset(iomuxc_gpr12_app_ltssm_enable, 1 << 10, IOMUXC_GPR12);
-
- hook_fault_code(16 + 6, imx_pcie_abort_handler, SIGBUS, 0,
- "imprecise external abort");
-
- /* add the pcie port */
- add_pcie_port(pdev, imx_pcie.base, imx_pcie.dbi_base);
-
- pci_common_init(&imx_pci);
-
- return 0;
-
-err:
- return ret;
-}
-
-static int imx_pcie_pltfm_remove(struct platform_device *pdev)
-{
- struct clk *clk;
- struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
- struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
- /* Release clocks, and disable power */
- if (np)
- clk = of_clk_get(np, 0);
- else
- clk = devm_clk_get(dev, "pcie_clk");
- if (IS_ERR(clk))
- pr_err("no pcie clock.\n");
-
- if (clk) {
- clk_disable_unprepare(clk);
- clk_put(clk);
- }
-
- // disable PCIe PHY clock ref
- imx_pcie_clrset(iomuxc_gpr1_pcie_ref_clk_en, 0 << 16, IOMUXC_GPR1);
-
- if (gpio_is_valid(imx_pcie.pcie_pwr_en)) {
- /* Disable PCIE power */
- gpio_request(imx_pcie.pcie_pwr_en, "PCIE POWER_EN");
-
- /* activate PCIE_PWR_EN */
- gpio_direction_output(imx_pcie.pcie_pwr_en, 0);
- }
-
- // power down PCIe PHY
- imx_pcie_clrset(iomuxc_gpr1_test_powerdown, 1 << 18, IOMUXC_GPR1);
-
- iounmap(imx_pcie.base);
- iounmap(imx_pcie.dbi_base);
- iounmap(imx_pcie.gpr_base);
- release_mem_region(iomem->start, resource_size(iomem));
- //platform_set_drvdata(pdev, NULL);
-
- return 0;
-}
-
-static const struct of_device_id of_imx_pcie_match[] = {
- { .compatible = "fsl,pcie" },
- {}
-};
-MODULE_DEVICE_TABLE(of, of_imx_pcie_match);
-
-static struct platform_driver imx_pcie_pltfm_driver = {
- .driver = {
- .name = "imx-pcie",
- .owner = THIS_MODULE,
- .of_match_table = of_imx_pcie_match,
- },
- .probe = imx_pcie_pltfm_probe,
- .remove = imx_pcie_pltfm_remove,
-};
-
-/*****************************************************************************\
- * *
- * Driver init/exit *
- * *
-\*****************************************************************************/
-
-static int __init imx_pcie_drv_init(void)
-{
- pcibios_min_io = 0;
- pcibios_min_mem = 0;
-
- return platform_driver_register(&imx_pcie_pltfm_driver);
-}
-
-static void __exit imx_pcie_drv_exit(void)
-{
- platform_driver_unregister(&imx_pcie_pltfm_driver);
-}
-
-//module_init(imx_pcie_drv_init);
-//module_exit(imx_pcie_drv_exit);
-late_initcall(imx_pcie_drv_init);
-
-MODULE_DESCRIPTION("i.MX PCIE platform driver");
-MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 13:36:36 +0000