[PATCH 3/4] PCI: mobiveil: Drop layerscape-gen4 support

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Only lx2160 rev1 use mobiveil PCIe controller. Rev2 switch to designware
PCIe controller. Rev2 is mass production chip and Rev1 will be not
supported. So drop related code.

Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
 drivers/pci/controller/mobiveil/Kconfig            |   9 -
 drivers/pci/controller/mobiveil/Makefile           |   1 -
 .../pci/controller/mobiveil/pcie-layerscape-gen4.c | 255 ---------------------
 3 files changed, 265 deletions(-)

diff --git a/drivers/pci/controller/mobiveil/Kconfig b/drivers/pci/controller/mobiveil/Kconfig
index 58ce034f701ab..89b8ce9e1262f 100644
--- a/drivers/pci/controller/mobiveil/Kconfig
+++ b/drivers/pci/controller/mobiveil/Kconfig
@@ -11,15 +11,6 @@ config PCIE_MOBIVEIL_HOST
 	depends on PCI_MSI
 	select PCIE_MOBIVEIL
 
-config PCIE_LAYERSCAPE_GEN4
-	bool "Freescale Layerscape Gen4 PCIe controller"
-	depends on ARCH_LAYERSCAPE || COMPILE_TEST
-	depends on PCI_MSI
-	select PCIE_MOBIVEIL_HOST
-	help
-	  Say Y here if you want PCIe Gen4 controller support on
-	  Layerscape SoCs.
-
 config PCIE_MOBIVEIL_PLAT
 	bool "Mobiveil AXI PCIe controller"
 	depends on ARCH_ZYNQMP || COMPILE_TEST
diff --git a/drivers/pci/controller/mobiveil/Makefile b/drivers/pci/controller/mobiveil/Makefile
index 99d879de32d6e..9fb6d1c6504dc 100644
--- a/drivers/pci/controller/mobiveil/Makefile
+++ b/drivers/pci/controller/mobiveil/Makefile
@@ -2,4 +2,3 @@
 obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
 obj-$(CONFIG_PCIE_MOBIVEIL_HOST) += pcie-mobiveil-host.o
 obj-$(CONFIG_PCIE_MOBIVEIL_PLAT) += pcie-mobiveil-plat.o
-obj-$(CONFIG_PCIE_LAYERSCAPE_GEN4) += pcie-layerscape-gen4.o
diff --git a/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c b/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c
deleted file mode 100644
index 5af22bee913bd..0000000000000
--- a/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c
+++ /dev/null
@@ -1,255 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * PCIe Gen4 host controller driver for NXP Layerscape SoCs
- *
- * Copyright 2019-2020 NXP
- *
- * Author: Zhiqiang Hou <Zhiqiang.Hou@xxxxxxx>
- */
-
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/of_pci.h>
-#include <linux/of_platform.h>
-#include <linux/of_irq.h>
-#include <linux/of_address.h>
-#include <linux/pci.h>
-#include <linux/platform_device.h>
-#include <linux/resource.h>
-#include <linux/mfd/syscon.h>
-#include <linux/regmap.h>
-
-#include "pcie-mobiveil.h"
-
-/* LUT and PF control registers */
-#define PCIE_LUT_OFF			0x80000
-#define PCIE_PF_OFF			0xc0000
-#define PCIE_PF_INT_STAT		0x18
-#define PF_INT_STAT_PABRST		BIT(31)
-
-#define PCIE_PF_DBG			0x7fc
-#define PF_DBG_LTSSM_MASK		0x3f
-#define PF_DBG_LTSSM_L0			0x2d /* L0 state */
-#define PF_DBG_WE			BIT(31)
-#define PF_DBG_PABR			BIT(27)
-
-#define to_ls_g4_pcie(x)		platform_get_drvdata((x)->pdev)
-
-struct ls_g4_pcie {
-	struct mobiveil_pcie pci;
-	struct delayed_work dwork;
-	int irq;
-};
-
-static inline u32 ls_g4_pcie_pf_readl(struct ls_g4_pcie *pcie, u32 off)
-{
-	return ioread32(pcie->pci.csr_axi_slave_base + PCIE_PF_OFF + off);
-}
-
-static inline void ls_g4_pcie_pf_writel(struct ls_g4_pcie *pcie,
-					u32 off, u32 val)
-{
-	iowrite32(val, pcie->pci.csr_axi_slave_base + PCIE_PF_OFF + off);
-}
-
-static int ls_g4_pcie_link_up(struct mobiveil_pcie *pci)
-{
-	struct ls_g4_pcie *pcie = to_ls_g4_pcie(pci);
-	u32 state;
-
-	state = ls_g4_pcie_pf_readl(pcie, PCIE_PF_DBG);
-	state =	state & PF_DBG_LTSSM_MASK;
-
-	if (state == PF_DBG_LTSSM_L0)
-		return 1;
-
-	return 0;
-}
-
-static void ls_g4_pcie_disable_interrupt(struct ls_g4_pcie *pcie)
-{
-	struct mobiveil_pcie *mv_pci = &pcie->pci;
-
-	mobiveil_csr_writel(mv_pci, 0, PAB_INTP_AMBA_MISC_ENB);
-}
-
-static void ls_g4_pcie_enable_interrupt(struct ls_g4_pcie *pcie)
-{
-	struct mobiveil_pcie *mv_pci = &pcie->pci;
-	u32 val;
-
-	/* Clear the interrupt status */
-	mobiveil_csr_writel(mv_pci, 0xffffffff, PAB_INTP_AMBA_MISC_STAT);
-
-	val = PAB_INTP_INTX_MASK | PAB_INTP_MSI | PAB_INTP_RESET |
-	      PAB_INTP_PCIE_UE | PAB_INTP_IE_PMREDI | PAB_INTP_IE_EC;
-	mobiveil_csr_writel(mv_pci, val, PAB_INTP_AMBA_MISC_ENB);
-}
-
-static int ls_g4_pcie_reinit_hw(struct ls_g4_pcie *pcie)
-{
-	struct mobiveil_pcie *mv_pci = &pcie->pci;
-	struct device *dev = &mv_pci->pdev->dev;
-	u32 val, act_stat;
-	int to = 100;
-
-	/* Poll for pab_csb_reset to set and PAB activity to clear */
-	do {
-		usleep_range(10, 15);
-		val = ls_g4_pcie_pf_readl(pcie, PCIE_PF_INT_STAT);
-		act_stat = mobiveil_csr_readl(mv_pci, PAB_ACTIVITY_STAT);
-	} while (((val & PF_INT_STAT_PABRST) == 0 || act_stat) && to--);
-	if (to < 0) {
-		dev_err(dev, "Poll PABRST&PABACT timeout\n");
-		return -EIO;
-	}
-
-	/* clear PEX_RESET bit in PEX_PF0_DBG register */
-	val = ls_g4_pcie_pf_readl(pcie, PCIE_PF_DBG);
-	val |= PF_DBG_WE;
-	ls_g4_pcie_pf_writel(pcie, PCIE_PF_DBG, val);
-
-	val = ls_g4_pcie_pf_readl(pcie, PCIE_PF_DBG);
-	val |= PF_DBG_PABR;
-	ls_g4_pcie_pf_writel(pcie, PCIE_PF_DBG, val);
-
-	val = ls_g4_pcie_pf_readl(pcie, PCIE_PF_DBG);
-	val &= ~PF_DBG_WE;
-	ls_g4_pcie_pf_writel(pcie, PCIE_PF_DBG, val);
-
-	mobiveil_host_init(mv_pci, true);
-
-	to = 100;
-	while (!ls_g4_pcie_link_up(mv_pci) && to--)
-		usleep_range(200, 250);
-	if (to < 0) {
-		dev_err(dev, "PCIe link training timeout\n");
-		return -EIO;
-	}
-
-	return 0;
-}
-
-static irqreturn_t ls_g4_pcie_isr(int irq, void *dev_id)
-{
-	struct ls_g4_pcie *pcie = (struct ls_g4_pcie *)dev_id;
-	struct mobiveil_pcie *mv_pci = &pcie->pci;
-	u32 val;
-
-	val = mobiveil_csr_readl(mv_pci, PAB_INTP_AMBA_MISC_STAT);
-	if (!val)
-		return IRQ_NONE;
-
-	if (val & PAB_INTP_RESET) {
-		ls_g4_pcie_disable_interrupt(pcie);
-		schedule_delayed_work(&pcie->dwork, msecs_to_jiffies(1));
-	}
-
-	mobiveil_csr_writel(mv_pci, val, PAB_INTP_AMBA_MISC_STAT);
-
-	return IRQ_HANDLED;
-}
-
-static int ls_g4_pcie_interrupt_init(struct mobiveil_pcie *mv_pci)
-{
-	struct ls_g4_pcie *pcie = to_ls_g4_pcie(mv_pci);
-	struct platform_device *pdev = mv_pci->pdev;
-	struct device *dev = &pdev->dev;
-	int ret;
-
-	pcie->irq = platform_get_irq_byname(pdev, "intr");
-	if (pcie->irq < 0)
-		return pcie->irq;
-
-	ret = devm_request_irq(dev, pcie->irq, ls_g4_pcie_isr,
-			       IRQF_SHARED, pdev->name, pcie);
-	if (ret) {
-		dev_err(dev, "Can't register PCIe IRQ, errno = %d\n", ret);
-		return  ret;
-	}
-
-	return 0;
-}
-
-static void ls_g4_pcie_reset(struct work_struct *work)
-{
-	struct delayed_work *dwork = container_of(work, struct delayed_work,
-						  work);
-	struct ls_g4_pcie *pcie = container_of(dwork, struct ls_g4_pcie, dwork);
-	struct mobiveil_pcie *mv_pci = &pcie->pci;
-	u16 ctrl;
-
-	ctrl = mobiveil_csr_readw(mv_pci, PCI_BRIDGE_CONTROL);
-	ctrl &= ~PCI_BRIDGE_CTL_BUS_RESET;
-	mobiveil_csr_writew(mv_pci, ctrl, PCI_BRIDGE_CONTROL);
-
-	if (!ls_g4_pcie_reinit_hw(pcie))
-		return;
-
-	ls_g4_pcie_enable_interrupt(pcie);
-}
-
-static const struct mobiveil_rp_ops ls_g4_pcie_rp_ops = {
-	.interrupt_init = ls_g4_pcie_interrupt_init,
-};
-
-static const struct mobiveil_pab_ops ls_g4_pcie_pab_ops = {
-	.link_up = ls_g4_pcie_link_up,
-};
-
-static int __init ls_g4_pcie_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct pci_host_bridge *bridge;
-	struct mobiveil_pcie *mv_pci;
-	struct ls_g4_pcie *pcie;
-	struct device_node *np = dev->of_node;
-	int ret;
-
-	if (!of_parse_phandle(np, "msi-parent", 0)) {
-		dev_err(dev, "Failed to find msi-parent\n");
-		return -EINVAL;
-	}
-
-	bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
-	if (!bridge)
-		return -ENOMEM;
-
-	pcie = pci_host_bridge_priv(bridge);
-	mv_pci = &pcie->pci;
-
-	mv_pci->pdev = pdev;
-	mv_pci->ops = &ls_g4_pcie_pab_ops;
-	mv_pci->rp.ops = &ls_g4_pcie_rp_ops;
-	mv_pci->rp.bridge = bridge;
-
-	platform_set_drvdata(pdev, pcie);
-
-	INIT_DELAYED_WORK(&pcie->dwork, ls_g4_pcie_reset);
-
-	ret = mobiveil_pcie_host_probe(mv_pci);
-	if (ret) {
-		dev_err(dev, "Fail to probe\n");
-		return  ret;
-	}
-
-	ls_g4_pcie_enable_interrupt(pcie);
-
-	return 0;
-}
-
-static const struct of_device_id ls_g4_pcie_of_match[] = {
-	{ .compatible = "fsl,lx2160a-pcie", },
-	{ },
-};
-
-static struct platform_driver ls_g4_pcie_driver = {
-	.driver = {
-		.name = "layerscape-pcie-gen4",
-		.of_match_table = ls_g4_pcie_of_match,
-		.suppress_bind_attrs = true,
-	},
-};
-
-builtin_platform_driver_probe(ls_g4_pcie_driver, ls_g4_pcie_probe);

-- 
2.34.1





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