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Subject[PATCH 4.14 038/106] PCI: aardvark: Replace custom macros by standard linux/pci_regs.h macros
Date
From: Pali Rohár <pali@kernel.org>

commit 96be36dbffacea0aa9e6ec4839583e79faa141a1 upstream.

PCI-E capability macros are already defined in linux/pci_regs.h.
Remove their reimplementation in pcie-aardvark.

Link: https://lore.kernel.org/r/20200430080625.26070-9-pali@kernel.org
Tested-by: Tomasz Maciej Nowak <tmn505@gmail.com>
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/pci/host/pci-aardvark.c | 42 ++++++++++++++++++----------------------
1 file changed, 19 insertions(+), 23 deletions(-)

--- a/drivers/pci/host/pci-aardvark.c
+++ b/drivers/pci/host/pci-aardvark.c
@@ -29,17 +29,7 @@
#define PCIE_CORE_CMD_IO_ACCESS_EN BIT(0)
#define PCIE_CORE_CMD_MEM_ACCESS_EN BIT(1)
#define PCIE_CORE_CMD_MEM_IO_REQ_EN BIT(2)
-#define PCIE_CORE_DEV_CTRL_STATS_REG 0xc8
-#define PCIE_CORE_DEV_CTRL_STATS_RELAX_ORDER_DISABLE (0 << 4)
-#define PCIE_CORE_DEV_CTRL_STATS_MAX_PAYLOAD_SZ_SHIFT 5
-#define PCIE_CORE_DEV_CTRL_STATS_SNOOP_DISABLE (0 << 11)
-#define PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SIZE_SHIFT 12
-#define PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SZ 0x2
-#define PCIE_CORE_LINK_CTRL_STAT_REG 0xd0
-#define PCIE_CORE_LINK_L0S_ENTRY BIT(0)
-#define PCIE_CORE_LINK_TRAINING BIT(5)
-#define PCIE_CORE_LINK_SPEED_SHIFT 16
-#define PCIE_CORE_LINK_WIDTH_SHIFT 20
+#define PCIE_CORE_PCIEXP_CAP 0xc0
#define PCIE_CORE_ERR_CAPCTL_REG 0x118
#define PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX BIT(5)
#define PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX_EN BIT(6)
@@ -229,6 +219,11 @@ static inline u32 advk_readl(struct advk
return readl(pcie->base + reg);
}

+static inline u16 advk_read16(struct advk_pcie *pcie, u64 reg)
+{
+ return advk_readl(pcie, (reg & ~0x3)) >> ((reg & 0x3) * 8);
+}
+
static int advk_pcie_link_up(struct advk_pcie *pcie)
{
u32 val, ltssm_state;
@@ -301,16 +296,16 @@ static int advk_pcie_train_at_gen(struct
* Start link training immediately after enabling it.
* This solves problems for some buggy cards.
*/
- reg = advk_readl(pcie, PCIE_CORE_LINK_CTRL_STAT_REG);
- reg |= PCIE_CORE_LINK_TRAINING;
- advk_writel(pcie, reg, PCIE_CORE_LINK_CTRL_STAT_REG);
+ reg = advk_readl(pcie, PCIE_CORE_PCIEXP_CAP + PCI_EXP_LNKCTL);
+ reg |= PCI_EXP_LNKCTL_RL;
+ advk_writel(pcie, reg, PCIE_CORE_PCIEXP_CAP + PCI_EXP_LNKCTL);

ret = advk_pcie_wait_for_link(pcie);
if (ret)
return ret;

- reg = advk_readl(pcie, PCIE_CORE_LINK_CTRL_STAT_REG);
- neg_gen = (reg >> PCIE_CORE_LINK_SPEED_SHIFT) & 0xf;
+ reg = advk_read16(pcie, PCIE_CORE_PCIEXP_CAP + PCI_EXP_LNKSTA);
+ neg_gen = reg & PCI_EXP_LNKSTA_CLS;

return neg_gen;
}
@@ -400,13 +395,14 @@ static void advk_pcie_setup_hw(struct ad
PCIE_CORE_ERR_CAPCTL_ECRC_CHCK_RCV;
advk_writel(pcie, reg, PCIE_CORE_ERR_CAPCTL_REG);

- /* Set PCIe Device Control and Status 1 PF0 register */
- reg = PCIE_CORE_DEV_CTRL_STATS_RELAX_ORDER_DISABLE |
- (7 << PCIE_CORE_DEV_CTRL_STATS_MAX_PAYLOAD_SZ_SHIFT) |
- PCIE_CORE_DEV_CTRL_STATS_SNOOP_DISABLE |
- (PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SZ <<
- PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SIZE_SHIFT);
- advk_writel(pcie, reg, PCIE_CORE_DEV_CTRL_STATS_REG);
+ /* Set PCIe Device Control register */
+ reg = advk_readl(pcie, PCIE_CORE_PCIEXP_CAP + PCI_EXP_DEVCTL);
+ reg &= ~PCI_EXP_DEVCTL_RELAX_EN;
+ reg &= ~PCI_EXP_DEVCTL_NOSNOOP_EN;
+ reg &= ~PCI_EXP_DEVCTL_READRQ;
+ reg |= PCI_EXP_DEVCTL_PAYLOAD; /* Set max payload size */
+ reg |= PCI_EXP_DEVCTL_READRQ_512B;
+ advk_writel(pcie, reg, PCIE_CORE_PCIEXP_CAP + PCI_EXP_DEVCTL);

/* Program PCIe Control 2 to disable strict ordering */
reg = PCIE_CORE_CTRL2_RESERVED |

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