From 051dd766c01e9746170e07c243907242692680b5 Mon Sep 17 00:00:00 2001
From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Date: Tue, 29 Jan 2019 08:10:30 +0000
Subject: [PATCH 20/26] PCI: mobiveil: disabled IB and OB windows set by
bootloader
Patch-mainline: Submitted, https://patchwork.kernel.org/cover/10785657/
References: fate#326572
Disabled all inbound and outbound windows before set up the windows
in kernel, in case transactions match the window set by bootloader.
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Minghuan Lian <Minghuan.Lian@nxp.com>
Reviewed-by: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
drivers/pci/host/mobiveil/pcie-mobiveil-host.c | 7 +++++++
drivers/pci/host/mobiveil/pcie-mobiveil.c | 18 ++++++++++++++++++
drivers/pci/host/mobiveil/pcie-mobiveil.h | 2 ++
3 files changed, 27 insertions(+)
diff --git a/drivers/pci/host/mobiveil/pcie-mobiveil-host.c b/drivers/pci/host/mobiveil/pcie-mobiveil-host.c
index beb823b35cee..a42ff86e800c 100644
--- a/drivers/pci/host/mobiveil/pcie-mobiveil-host.c
+++ b/drivers/pci/host/mobiveil/pcie-mobiveil-host.c
@@ -221,6 +221,13 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
{
u32 value, pab_ctrl, type;
struct resource_entry *win;
+ int i;
+
+ /* Disable all inbound/outbound windows */
+ for (i = 0; i < pcie->apio_wins; i++)
+ mobiveil_pcie_disable_ob_win(pcie, i);
+ for (i = 0; i < pcie->ppio_wins; i++)
+ mobiveil_pcie_disable_ib_win(pcie, i);
/* setup bus numbers */
value = csr_readl(pcie, PCI_PRIMARY_BUS);
diff --git a/drivers/pci/host/mobiveil/pcie-mobiveil.c b/drivers/pci/host/mobiveil/pcie-mobiveil.c
index 370658d6546d..49d471b75925 100644
--- a/drivers/pci/host/mobiveil/pcie-mobiveil.c
+++ b/drivers/pci/host/mobiveil/pcie-mobiveil.c
@@ -226,3 +226,21 @@ int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
return -ETIMEDOUT;
}
+
+void mobiveil_pcie_disable_ib_win(struct mobiveil_pcie *pci, int win_num)
+{
+ u32 val;
+
+ val = csr_readl(pci, PAB_PEX_AMAP_CTRL(win_num));
+ val &= ~(1 << AMAP_CTRL_EN_SHIFT);
+ csr_writel(pci, val, PAB_PEX_AMAP_CTRL(win_num));
+}
+
+void mobiveil_pcie_disable_ob_win(struct mobiveil_pcie *pci, int win_num)
+{
+ u32 val;
+
+ val = csr_readl(pci, PAB_AXI_AMAP_CTRL(win_num));
+ val &= ~(1 << WIN_ENABLE_SHIFT);
+ csr_writel(pci, val, PAB_AXI_AMAP_CTRL(win_num));
+}
diff --git a/drivers/pci/host/mobiveil/pcie-mobiveil.h b/drivers/pci/host/mobiveil/pcie-mobiveil.h
index eb4cb61291a8..81685840b378 100644
--- a/drivers/pci/host/mobiveil/pcie-mobiveil.h
+++ b/drivers/pci/host/mobiveil/pcie-mobiveil.h
@@ -171,6 +171,8 @@ void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
u64 pci_addr, u32 type, u64 size);
void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
u64 pci_addr, u32 type, u64 size);
+void mobiveil_pcie_disable_ob_win(struct mobiveil_pcie *pci, int win_num);
+void mobiveil_pcie_disable_ib_win(struct mobiveil_pcie *pci, int win_num);
u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size);
void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size);
--
2.11.0