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Subject[PATCHv6 21/28] PCI: mobiveil: Clear the target fields before updating the register
Date
Clear the target fields in the register before programming with
an new value.

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>
---
V6:
- Splited from #9 of v5 patches, no functional change.

drivers/pci/controller/pcie-mobiveil.c | 17 ++++++++++++-----
1 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index 0560344..7d18e59 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -65,6 +65,8 @@
#define PAB_AXI_AMAP_CTRL(win) PAB_REG_ADDR(0x0ba0, win)
#define WIN_ENABLE_SHIFT 0
#define WIN_TYPE_SHIFT 1
+#define WIN_TYPE_MASK 0x3
+#define WIN_SIZE_MASK 0xfffffc00

#define PAB_EXT_AXI_AMAP_SIZE(win) PAB_EXT_REG_ADDR(0xbaf0, win)

@@ -82,6 +84,7 @@
#define PAB_PEX_AMAP_CTRL(win) PAB_REG_ADDR(0x4ba0, win)
#define AMAP_CTRL_EN_SHIFT 0
#define AMAP_CTRL_TYPE_SHIFT 1
+#define AMAP_CTRL_TYPE_MASK 3

#define PAB_EXT_PEX_AMAP_SIZEN(win) PAB_EXT_REG_ADDR(0xbef0, win)
#define PAB_PEX_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x4ba4, win)
@@ -469,9 +472,9 @@ static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
csr_writel(pcie, value, PAB_PEX_PIO_CTRL);

value = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
- value |= (type << AMAP_CTRL_TYPE_SHIFT) |
- (1 << AMAP_CTRL_EN_SHIFT) |
- lower_32_bits(size64);
+ value &= ~(AMAP_CTRL_TYPE_MASK << AMAP_CTRL_TYPE_SHIFT | WIN_SIZE_MASK);
+ value |= type << AMAP_CTRL_TYPE_SHIFT | 1 << AMAP_CTRL_EN_SHIFT |
+ lower_32_bits(size64);
csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num));

csr_writel(pcie, upper_32_bits(size64),
@@ -490,6 +493,7 @@ static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
u64 cpu_addr, u64 pci_addr, u32 type, u64 size)
{
+ u32 value;
u64 size64 = ~(size - 1);

if (win_num >= pcie->apio_wins) {
@@ -502,8 +506,11 @@ static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
* program Enable Bit to 1, Type Bit to (00) base 2, AXI Window Size Bit
* to 4 KB in PAB_AXI_AMAP_CTRL register
*/
- csr_writel(pcie, 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
- lower_32_bits(size64), PAB_AXI_AMAP_CTRL(win_num));
+ value = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
+ value &= ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT | WIN_SIZE_MASK);
+ value |= 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
+ lower_32_bits(size64);
+ csr_writel(pcie, value, PAB_AXI_AMAP_CTRL(win_num));

csr_writel(pcie, upper_32_bits(size64), PAB_EXT_AXI_AMAP_SIZE(win_num));

--
1.7.1
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