From deab0f21ffd4c84807c12f35524e2dfc4cdd4104 Mon Sep 17 00:00:00 2001 From: Luka Perkov Date: Wed, 23 Oct 2013 22:16:05 +0000 Subject: [PATCH] imx6: remove obsolete files Signed-off-by: Tim Harvey SVN-Revision: 38512 --- .../imx6/files-3.10/arch/arm/mach-imx/msi.c | 156 --- .../imx6/files-3.10/arch/arm/mach-imx/msi.h | 29 - .../imx6/files-3.10/arch/arm/mach-imx/pcie.c | 1037 ----------------- 3 files changed, 1222 deletions(-) delete mode 100644 target/linux/imx6/files-3.10/arch/arm/mach-imx/msi.c delete mode 100644 target/linux/imx6/files-3.10/arch/arm/mach-imx/msi.h delete mode 100644 target/linux/imx6/files-3.10/arch/arm/mach-imx/pcie.c 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 -#include -#include -#include -#include -#include -#include - -#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 - * - * 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -#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"); -- 2.30.2