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db4bb19679
This is required for linux-6.1 compatibility. IRQs are not automatically mapped from HW to virtual IRQ numbers when the IRQ domain is registered. This happens when the IRQ number is read from the device tree based on the IRQ domain from the device tree now. In kernel 5.15 it was done when the IRQ domain was registered. Signed-off-by: Martin Schiller <ms@dev.tdt.de>
487 lines
15 KiB
Diff
487 lines
15 KiB
Diff
From 1d1885f4a7abd7272f47b835b03d8662fb981d19 Mon Sep 17 00:00:00 2001
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From: Eddi De Pieri <eddi@depieri.net>
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Date: Tue, 14 Oct 2014 11:04:00 +0000
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Subject: [PATCH] MIPS: lantiq: ifxmips_pcie: use of
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Signed-off-by: Eddi De Pieri <eddi@depieri.net>
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---
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arch/mips/pci/Makefile | 2 +-
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arch/mips/pci/ifxmips_pcie.c | 151 +++++++++++++++++++++++++++----
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arch/mips/pci/ifxmips_pcie_vr9.h | 105 ---------------------
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3 files changed, 133 insertions(+), 125 deletions(-)
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--- a/arch/mips/pci/Makefile
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+++ b/arch/mips/pci/Makefile
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@@ -43,7 +43,7 @@ obj-$(CONFIG_PCI_LANTIQ) += pci-lantiq.o
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obj-$(CONFIG_SOC_MT7620) += pci-mt7620.o
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obj-$(CONFIG_SOC_RT288X) += pci-rt2880.o
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obj-$(CONFIG_SOC_RT3883) += pci-rt3883.o
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-obj-$(CONFIG_PCIE_LANTIQ) += ifxmips_pcie_phy.o ifxmips_pcie.o fixup-lantiq-pcie.o
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+obj-$(CONFIG_PCIE_LANTIQ) += ifxmips_pcie.o fixup-lantiq-pcie.o
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obj-$(CONFIG_PCIE_LANTIQ_MSI) += pcie-lantiq-msi.o
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obj-$(CONFIG_TANBAC_TB0219) += fixup-tb0219.o
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obj-$(CONFIG_TANBAC_TB0226) += fixup-tb0226.o
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--- a/arch/mips/pci/ifxmips_pcie.c
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+++ b/arch/mips/pci/ifxmips_pcie.c
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@@ -16,8 +16,15 @@
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#include <asm/paccess.h>
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#include <linux/pci.h>
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#include <linux/pci_regs.h>
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+#include <linux/phy/phy.h>
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+#include <linux/regmap.h>
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+#include <linux/reset.h>
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+#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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+#include <linux/of_gpio.h>
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+#include <linux/of_platform.h>
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+
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#include "ifxmips_pcie.h"
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#include "ifxmips_pcie_reg.h"
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@@ -25,11 +32,6 @@
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#define IFX_PCIE_ERROR_INT
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#define IFX_PCIE_IO_32BIT
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-#define IFX_PCIE_IR (INT_NUM_IM4_IRL0 + 25)
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-#define IFX_PCIE_INTA (INT_NUM_IM4_IRL0 + 8)
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-#define IFX_PCIE_INTB (INT_NUM_IM4_IRL0 + 9)
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-#define IFX_PCIE_INTC (INT_NUM_IM4_IRL0 + 10)
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-#define IFX_PCIE_INTD (INT_NUM_IM4_IRL0 + 11)
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#define MS(_v, _f) (((_v) & (_f)) >> _f##_S)
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#define SM(_v, _f) (((_v) << _f##_S) & (_f))
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#define IFX_REG_SET_BIT(_f, _r) \
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@@ -40,30 +42,30 @@
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static DEFINE_SPINLOCK(ifx_pcie_lock);
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u32 g_pcie_debug_flag = PCIE_MSG_ANY & (~PCIE_MSG_CFG);
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+static int pcie_reset_gpio;
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+static struct phy *ltq_pcie_phy;
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+static struct reset_control *ltq_pcie_reset;
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+static struct regmap *ltq_rcu_regmap;
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+static bool switch_pcie_endianess;
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static ifx_pcie_irq_t pcie_irqs[IFX_PCIE_CORE_NR] = {
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{
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.ir_irq = {
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- .irq = IFX_PCIE_IR,
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.name = "ifx_pcie_rc0",
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},
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.legacy_irq = {
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{
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.irq_bit = PCIE_IRN_INTA,
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- .irq = IFX_PCIE_INTA,
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},
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{
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.irq_bit = PCIE_IRN_INTB,
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- .irq = IFX_PCIE_INTB,
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},
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{
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.irq_bit = PCIE_IRN_INTC,
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- .irq = IFX_PCIE_INTC,
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},
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{
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.irq_bit = PCIE_IRN_INTD,
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- .irq = IFX_PCIE_INTD,
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},
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},
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},
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@@ -82,6 +84,22 @@ void ifx_pcie_debug(const char *fmt, ...
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printk("%s", buf);
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}
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+static inline void pcie_ep_gpio_rst_init(int pcie_port)
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+{
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+ gpio_direction_output(pcie_reset_gpio, 1);
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+ gpio_set_value(pcie_reset_gpio, 1);
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+}
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+
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+static inline void pcie_device_rst_assert(int pcie_port)
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+{
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+ gpio_set_value(pcie_reset_gpio, 0);
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+}
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+
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+static inline void pcie_device_rst_deassert(int pcie_port)
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+{
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+ mdelay(100);
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+ gpio_direction_output(pcie_reset_gpio, 1);
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+}
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static inline int pcie_ltssm_enable(int pcie_port)
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{
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@@ -857,7 +875,8 @@ pcie_rc_core_int_init(int pcie_port)
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ret = request_irq(pcie_irqs[pcie_port].ir_irq.irq, pcie_rc_core_isr, 0,
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pcie_irqs[pcie_port].ir_irq.name, &ifx_pcie_controller[pcie_port]);
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if (ret)
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- printk(KERN_ERR "%s request irq %d failed\n", __func__, IFX_PCIE_IR);
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+ printk(KERN_ERR "%s request irq %d failed\n", __func__,
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+ pcie_irqs[pcie_port].ir_irq.irq);
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return ret;
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}
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@@ -988,10 +1007,26 @@ int ifx_pcie_bios_plat_dev_init(struct
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static int
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pcie_rc_initialize(int pcie_port)
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{
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- int i;
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+ int i, ret;
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#define IFX_PCIE_PHY_LOOP_CNT 5
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- pcie_rcu_endian_setup(pcie_port);
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+ regmap_update_bits(ltq_rcu_regmap, 0x4c, IFX_RCU_AHB_BE_PCIE_M,
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+ IFX_RCU_AHB_BE_PCIE_M);
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+
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+#ifdef CONFIG_IFX_PCIE_HW_SWAP
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+ regmap_update_bits(ltq_rcu_regmap, 0x4c, IFX_RCU_AHB_BE_PCIE_S,
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+ IFX_RCU_AHB_BE_PCIE_S);
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+ if (switch_pcie_endianess) {
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+ regmap_update_bits(ltq_rcu_regmap, 0x4c, IFX_RCU_AHB_BE_XBAR_S,
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+ IFX_RCU_AHB_BE_XBAR_S);
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+ }
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+#else
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+ regmap_update_bits(ltq_rcu_regmap, 0x4c, IFX_RCU_AHB_BE_PCIE_S,
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+ 0x0);
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+#endif
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+
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+ regmap_update_bits(ltq_rcu_regmap, 0x4c, IFX_RCU_AHB_BE_XBAR_M,
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+ 0x0);
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pcie_ep_gpio_rst_init(pcie_port);
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@@ -1000,26 +1035,21 @@ pcie_rc_initialize(int pcie_port)
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* reset PCIe PHY will solve this issue
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*/
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for (i = 0; i < IFX_PCIE_PHY_LOOP_CNT; i++) {
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- /* Disable PCIe PHY Analog part for sanity check */
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- pcie_phy_pmu_disable(pcie_port);
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-
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- pcie_phy_rst_assert(pcie_port);
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- pcie_phy_rst_deassert(pcie_port);
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-
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- /* Make sure PHY PLL is stable */
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- udelay(20);
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-
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- /* PCIe Core reset enabled, low active, sw programmed */
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- pcie_core_rst_assert(pcie_port);
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+ ret = phy_init(ltq_pcie_phy);
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+ if (ret)
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+ continue;
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/* Put PCIe EP in reset status */
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pcie_device_rst_assert(pcie_port);
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- /* PCI PHY & Core reset disabled, high active, sw programmed */
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- pcie_core_rst_deassert(pcie_port);
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+ udelay(1);
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+ reset_control_deassert(ltq_pcie_reset);
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- /* Already in a quiet state, program PLL, enable PHY, check ready bit */
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- pcie_phy_clock_mode_setup(pcie_port);
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+ ret = phy_power_on(ltq_pcie_phy);
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+ if (ret) {
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+ phy_exit(ltq_pcie_phy);
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+ continue;
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+ }
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/* Enable PCIe PHY and Clock */
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pcie_core_pmu_setup(pcie_port);
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@@ -1035,6 +1065,10 @@ pcie_rc_initialize(int pcie_port)
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/* Once link is up, break out */
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if (pcie_app_loigc_setup(pcie_port) == 0)
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break;
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+
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+ phy_power_off(ltq_pcie_phy);
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+ reset_control_assert(ltq_pcie_reset);
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+ phy_exit(ltq_pcie_phy);
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}
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if (i >= IFX_PCIE_PHY_LOOP_CNT) {
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printk(KERN_ERR "%s link up failed!!!!!\n", __func__);
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@@ -1045,17 +1079,73 @@ pcie_rc_initialize(int pcie_port)
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return 0;
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}
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-static int __init ifx_pcie_bios_init(void)
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+static int ifx_pcie_bios_probe(struct platform_device *pdev)
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{
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+ struct device_node *node = pdev->dev.of_node;
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void __iomem *io_map_base;
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int pcie_port;
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int startup_port;
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+ struct device_node *np;
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+ struct pci_bus *bus;
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+
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+ /*
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+ * In case a PCI device is physical present, the Lantiq PCI driver need
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+ * to be loaded prior to the Lantiq PCIe driver. Otherwise none of them
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+ * will work.
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+ *
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+ * In case the lantiq PCI driver is enabled in the device tree, check if
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+ * a PCI bus (hopefully the one of the Lantiq PCI driver one) is already
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+ * registered.
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+ *
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+ * It will fail if there is another PCI controller, this controller is
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+ * registered before the Lantiq PCIe driver is probe and the lantiq PCI
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+ */
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+ np = of_find_compatible_node(NULL, NULL, "lantiq,pci-xway");
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+
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+ if (of_device_is_available(np)) {
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+ bus = pci_find_next_bus(bus);
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+
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+ if (!bus)
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+ return -EPROBE_DEFER;
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+ }
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/* Enable AHB Master/ Slave */
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pcie_ahb_pmu_setup();
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startup_port = IFX_PCIE_PORT0;
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-
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+
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+ ltq_pcie_phy = devm_phy_get(&pdev->dev, "pcie");
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+ if (IS_ERR(ltq_pcie_phy))
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+ return dev_err_probe(&pdev->dev, PTR_ERR(ltq_pcie_phy),
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+ "failed to get the PCIe PHY\n");
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+
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+ ltq_pcie_reset = devm_reset_control_get_shared(&pdev->dev, NULL);
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+ if (IS_ERR(ltq_pcie_reset)) {
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+ dev_err(&pdev->dev, "failed to get the PCIe reset line\n");
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+ return PTR_ERR(ltq_pcie_reset);
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+ }
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+
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+ if (of_property_read_bool(node, "lantiq,switch-pcie-endianess")) {
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+ switch_pcie_endianess = true;
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+ dev_info(&pdev->dev, "switch pcie endianess requested\n");
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+ } else {
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+ switch_pcie_endianess = false;
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+ }
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+
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+ ltq_rcu_regmap = syscon_regmap_lookup_by_phandle(node, "lantiq,rcu");
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+ if (IS_ERR(ltq_rcu_regmap))
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+ return PTR_ERR(ltq_rcu_regmap);
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+
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+ pcie_reset_gpio = of_get_named_gpio(node, "gpio-reset", 0);
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+ if (gpio_is_valid(pcie_reset_gpio)) {
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+ int ret = devm_gpio_request(&pdev->dev, pcie_reset_gpio, "pcie-reset");
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+ if (ret) {
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+ dev_err(&pdev->dev, "failed to request gpio %d\n", pcie_reset_gpio);
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+ return ret;
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+ }
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+ gpio_direction_output(pcie_reset_gpio, 1);
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+ }
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+
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for (pcie_port = startup_port; pcie_port < IFX_PCIE_CORE_NR; pcie_port++){
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if (pcie_rc_initialize(pcie_port) == 0) {
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IFX_PCIE_PRINT(PCIE_MSG_INIT, "%s: ifx_pcie_cfg_base 0x%p\n",
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@@ -1066,7 +1156,19 @@ static int __init ifx_pcie_bios_init(voi
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IFX_PCIE_PRINT(PCIE_MSG_ERR, "%s io space ioremap failed\n", __func__);
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return -ENOMEM;
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}
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+ pcie_irqs[pcie_port].ir_irq.irq = platform_get_irq(pdev, 0);
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+ if (pcie_irqs[pcie_port].ir_irq.irq < 0)
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+ return pcie_irqs[pcie_port].ir_irq.irq;
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+
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+ for (int i = 0; i <= 3; i++){
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+ pcie_irqs[pcie_port].legacy_irq[i].irq = platform_get_irq(pdev, i + 1);
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+
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+ if (pcie_irqs[pcie_port].legacy_irq[i].irq < 0)
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+ return pcie_irqs[pcie_port].legacy_irq[i].irq;
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+ }
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+
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ifx_pcie_controller[pcie_port].pcic.io_map_base = (unsigned long)io_map_base;
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+ pci_load_of_ranges(&ifx_pcie_controller[pcie_port].pcic, node);
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register_pci_controller(&ifx_pcie_controller[pcie_port].pcic);
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/* XXX, clear error status */
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@@ -1083,6 +1185,30 @@ static int __init ifx_pcie_bios_init(voi
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return 0;
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}
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+
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+static const struct of_device_id ifxmips_pcie_match[] = {
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+ { .compatible = "lantiq,pcie-xrx200" },
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+ {},
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+};
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+MODULE_DEVICE_TABLE(of, ifxmips_pcie_match);
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+
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+static struct platform_driver ltq_pci_driver = {
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+ .probe = ifx_pcie_bios_probe,
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+ .driver = {
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+ .name = "pcie-xrx200",
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+ .owner = THIS_MODULE,
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+ .of_match_table = ifxmips_pcie_match,
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+ },
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+};
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+
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+int __init ifx_pcie_bios_init(void)
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+{
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+ int ret = platform_driver_register(<q_pci_driver);
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+ if (ret)
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+ pr_info("pcie-xrx200: Error registering platform driver!");
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+ return ret;
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+}
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+
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arch_initcall(ifx_pcie_bios_init);
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MODULE_LICENSE("GPL");
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--- a/arch/mips/pci/ifxmips_pcie_vr9.h
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+++ b/arch/mips/pci/ifxmips_pcie_vr9.h
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@@ -22,8 +22,6 @@
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#include <linux/gpio.h>
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#include <lantiq_soc.h>
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-#define IFX_PCIE_GPIO_RESET 494
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-
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#define IFX_REG_R32 ltq_r32
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#define IFX_REG_W32 ltq_w32
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#define CONFIG_IFX_PCIE_HW_SWAP
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@@ -54,21 +52,6 @@
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#define OUT ((volatile u32*)(IFX_GPIO + 0x0070))
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-static inline void pcie_ep_gpio_rst_init(int pcie_port)
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-{
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-
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- gpio_request(IFX_PCIE_GPIO_RESET, "pcie-reset");
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- gpio_direction_output(IFX_PCIE_GPIO_RESET, 1);
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- gpio_set_value(IFX_PCIE_GPIO_RESET, 1);
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-
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-/* ifx_gpio_pin_reserve(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
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- ifx_gpio_output_set(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
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- ifx_gpio_dir_out_set(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
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- ifx_gpio_altsel0_clear(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
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- ifx_gpio_altsel1_clear(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
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- ifx_gpio_open_drain_set(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);*/
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-}
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-
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static inline void pcie_ahb_pmu_setup(void)
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{
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/* Enable AHB bus master/slave */
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@@ -80,24 +63,6 @@ static inline void pcie_ahb_pmu_setup(vo
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//AHBS_PMU_SETUP(IFX_PMU_ENABLE);
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}
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-static inline void pcie_rcu_endian_setup(int pcie_port)
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-{
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- u32 reg;
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-
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- reg = IFX_REG_R32(IFX_RCU_AHB_ENDIAN);
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-#ifdef CONFIG_IFX_PCIE_HW_SWAP
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- reg |= IFX_RCU_AHB_BE_PCIE_M;
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- reg |= IFX_RCU_AHB_BE_PCIE_S;
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- reg &= ~IFX_RCU_AHB_BE_XBAR_M;
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-#else
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- reg |= IFX_RCU_AHB_BE_PCIE_M;
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- reg &= ~IFX_RCU_AHB_BE_PCIE_S;
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- reg &= ~IFX_RCU_AHB_BE_XBAR_M;
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-#endif /* CONFIG_IFX_PCIE_HW_SWAP */
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- IFX_REG_W32(reg, IFX_RCU_AHB_ENDIAN);
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- IFX_PCIE_PRINT(PCIE_MSG_REG, "%s IFX_RCU_AHB_ENDIAN: 0x%08x\n", __func__, IFX_REG_R32(IFX_RCU_AHB_ENDIAN));
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-}
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-
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static inline void pcie_phy_pmu_enable(int pcie_port)
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{
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struct clk *clk;
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@@ -116,17 +81,6 @@ static inline void pcie_phy_pmu_disable(
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// PCIE_PHY_PMU_SETUP(IFX_PMU_DISABLE);
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}
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-static inline void pcie_pdi_big_endian(int pcie_port)
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-{
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- u32 reg;
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-
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- /* SRAM2PDI endianness control. */
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- reg = IFX_REG_R32(IFX_RCU_AHB_ENDIAN);
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- /* Config AHB->PCIe and PDI endianness */
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- reg |= IFX_RCU_AHB_BE_PCIE_PDI;
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- IFX_REG_W32(reg, IFX_RCU_AHB_ENDIAN);
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-}
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-
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static inline void pcie_pdi_pmu_enable(int pcie_port)
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|
{
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/* Enable PDI to access PCIe PHY register */
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@@ -136,65 +90,6 @@ static inline void pcie_pdi_pmu_enable(i
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//PDI_PMU_SETUP(IFX_PMU_ENABLE);
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}
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|
|
|
-static inline void pcie_core_rst_assert(int pcie_port)
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|
-{
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|
- u32 reg;
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|
-
|
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- reg = IFX_REG_R32(IFX_RCU_RST_REQ);
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|
-
|
|
- /* Reset PCIe PHY & Core, bit 22, bit 26 may be affected if write it directly */
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|
- reg |= 0x00400000;
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|
- IFX_REG_W32(reg, IFX_RCU_RST_REQ);
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|
-}
|
|
-
|
|
-static inline void pcie_core_rst_deassert(int pcie_port)
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|
-{
|
|
- u32 reg;
|
|
-
|
|
- /* Make sure one micro-second delay */
|
|
- udelay(1);
|
|
-
|
|
- /* Reset PCIe PHY & Core, bit 22 */
|
|
- reg = IFX_REG_R32(IFX_RCU_RST_REQ);
|
|
- reg &= ~0x00400000;
|
|
- IFX_REG_W32(reg, IFX_RCU_RST_REQ);
|
|
-}
|
|
-
|
|
-static inline void pcie_phy_rst_assert(int pcie_port)
|
|
-{
|
|
- u32 reg;
|
|
-
|
|
- reg = IFX_REG_R32(IFX_RCU_RST_REQ);
|
|
- reg |= 0x00001000; /* Bit 12 */
|
|
- IFX_REG_W32(reg, IFX_RCU_RST_REQ);
|
|
-}
|
|
-
|
|
-static inline void pcie_phy_rst_deassert(int pcie_port)
|
|
-{
|
|
- u32 reg;
|
|
-
|
|
- /* Make sure one micro-second delay */
|
|
- udelay(1);
|
|
-
|
|
- reg = IFX_REG_R32(IFX_RCU_RST_REQ);
|
|
- reg &= ~0x00001000; /* Bit 12 */
|
|
- IFX_REG_W32(reg, IFX_RCU_RST_REQ);
|
|
-}
|
|
-
|
|
-static inline void pcie_device_rst_assert(int pcie_port)
|
|
-{
|
|
- gpio_set_value(IFX_PCIE_GPIO_RESET, 0);
|
|
-// ifx_gpio_output_clear(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
|
|
-}
|
|
-
|
|
-static inline void pcie_device_rst_deassert(int pcie_port)
|
|
-{
|
|
- mdelay(100);
|
|
- gpio_direction_output(IFX_PCIE_GPIO_RESET, 1);
|
|
-// gpio_set_value(IFX_PCIE_GPIO_RESET, 1);
|
|
- //ifx_gpio_output_set(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
|
|
-}
|
|
-
|
|
static inline void pcie_core_pmu_setup(int pcie_port)
|
|
{
|
|
struct clk *clk;
|
|
--- a/arch/mips/pci/ifxmips_pcie.h
|
|
+++ b/arch/mips/pci/ifxmips_pcie.h
|
|
@@ -96,13 +96,13 @@ struct ifx_pci_controller {
|
|
};
|
|
|
|
typedef struct ifx_pcie_ir_irq {
|
|
- const unsigned int irq;
|
|
+ unsigned int irq;
|
|
const char name[16];
|
|
}ifx_pcie_ir_irq_t;
|
|
|
|
typedef struct ifx_pcie_legacy_irq{
|
|
const u32 irq_bit;
|
|
- const int irq;
|
|
+ int irq;
|
|
}ifx_pcie_legacy_irq_t;
|
|
|
|
typedef struct ifx_pcie_irq {
|