Hi,
This series brings in several code cleanups and improvements to the
Qualcomm PCIe controller drivers (RC and EP). The cleanup part mostly
cleans up the bitfield definitions and transitions to bulk APIs for clocks,
and resets. The improvement part adds the debugfs entries to track link
transition counts in RC driver.
Testing
-------
This series has been tested on SDM845, SM8250, SC8280XP, IPQ4019 based
platforms.
Merging Strategy
----------------
Binding and driver patches through PCI tree and DTS patches through Qcom
tree.
NOTE: For the sake of maintaining dependency, I've clubbed both cleanup and
improvement patches in the same series. If any of the maintainers prefer to
have them splitted, please let me know.
Thanks,
Mani
Changes in v3:
* Introduced init_debugfs callback for defining the debugfs interface specific
to IP versions
* Added a debugfs patch for v2.4.0
* Added a patch to rename qcom_pcie_config_sid_sm8250() function
* Added tested-by for patch 11/19
Changes in v2:
* Moved the "mhi" region to last in the binding and dtsi's
* Dropped the patches renaming the "mmio" region
Manivannan Sadhasivam (19):
PCI: qcom: Remove PCIE20_ prefix from register definitions
PCI: qcom: Sort and group registers and bitfield definitions
PCI: qcom: Use bitfield definitions for register fields
PCI: qcom: Add missing macros for register fields
PCI: qcom: Use lower case for hex
PCI: qcom: Use bulk reset APIs for handling resets for IP rev 2.1.0
PCI: qcom: Use bulk clock APIs for handling clocks for IP rev 1.0.0
PCI: qcom: Use bulk clock APIs for handling clocks for IP rev 2.3.2
PCI: qcom: Use bulk clock APIs for handling clocks for IP rev 2.3.3
PCI: qcom: Use bulk reset APIs for handling resets for IP rev 2.3.3
PCI: qcom: Use bulk reset APIs for handling resets for IP rev 2.4.0
PCI: qcom: Use macros for defining total no. of clocks & supplies
PCI: qcom: Rename qcom_pcie_config_sid_sm8250() to reflect IP version
dt-bindings: PCI: qcom: Add "mhi" register region to supported SoCs
arm64: dts: qcom: sdm845: Add "mhi" region to the PCIe nodes
arm64: dts: qcom: sm8250: Add "mhi" region to the PCIe nodes
arm64: dts: qcom: sc8280xp: Add "mhi" region to the PCIe nodes
PCI: qcom: Expose link transition counts via debugfs for v1.9.0 &
v2.7.0
PCI: qcom: Expose link transition counts via debugfs for v2.4.0
.../devicetree/bindings/pci/qcom,pcie.yaml | 12 +-
arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 25 +-
arch/arm64/boot/dts/qcom/sdm845.dtsi | 10 +-
arch/arm64/boot/dts/qcom/sm8250.dtsi | 15 +-
drivers/pci/controller/dwc/pcie-qcom.c | 1200 +++++++----------
5 files changed, 521 insertions(+), 741 deletions(-)
--
2.25.1
The PCIE part is redundant and 20 doesn't represent anything across the
SoCs supported now. So let's get rid of the prefix.
This involves adding the IP version suffix to one definition of
PARF_SLV_ADDR_SPACE_SIZE that defines offset specific to that version.
The other definition is generic for the rest of the versions.
Also, the register PCIE20_LNK_CONTROL2_LINK_STATUS2 is not used anywhere,
hence removed.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 184 ++++++++++++-------------
1 file changed, 91 insertions(+), 93 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index a232b04af048..6930bc9ceeb5 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -33,7 +33,7 @@
#include "../../pci.h"
#include "pcie-designware.h"
-#define PCIE20_PARF_SYS_CTRL 0x00
+#define PARF_SYS_CTRL 0x00
#define MST_WAKEUP_EN BIT(13)
#define SLV_WAKEUP_EN BIT(12)
#define MSTR_ACLK_CGC_DIS BIT(10)
@@ -43,39 +43,39 @@
#define L23_CLK_RMV_DIS BIT(2)
#define L1_CLK_RMV_DIS BIT(1)
-#define PCIE20_PARF_PM_CTRL 0x20
+#define PARF_PM_CTRL 0x20
#define REQ_NOT_ENTR_L1 BIT(5)
-#define PCIE20_PARF_PHY_CTRL 0x40
+#define PARF_PHY_CTRL 0x40
#define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK GENMASK(20, 16)
#define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) ((x) << 16)
-#define PCIE20_PARF_PHY_REFCLK 0x4C
+#define PARF_PHY_REFCLK 0x4C
#define PHY_REFCLK_SSP_EN BIT(16)
#define PHY_REFCLK_USE_PAD BIT(12)
-#define PCIE20_PARF_DBI_BASE_ADDR 0x168
-#define PCIE20_PARF_SLV_ADDR_SPACE_SIZE 0x16C
-#define PCIE20_PARF_MHI_CLOCK_RESET_CTRL 0x174
+#define PARF_DBI_BASE_ADDR 0x168
+#define PARF_SLV_ADDR_SPACE_SIZE_2_3_3 0x16C /* Register offset specific to IP rev 2.3.3 */
+#define PARF_MHI_CLOCK_RESET_CTRL 0x174
#define AHB_CLK_EN BIT(0)
#define MSTR_AXI_CLK_EN BIT(1)
#define BYPASS BIT(4)
-#define PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT 0x178
-#define PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1A8
-#define PCIE20_PARF_LTSSM 0x1B0
-#define PCIE20_PARF_SID_OFFSET 0x234
-#define PCIE20_PARF_BDF_TRANSLATE_CFG 0x24C
-#define PCIE20_PARF_DEVICE_TYPE 0x1000
-#define PCIE20_PARF_BDF_TO_SID_TABLE_N 0x2000
+#define PARF_AXI_MSTR_WR_ADDR_HALT 0x178
+#define PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1A8
+#define PARF_LTSSM 0x1B0
+#define PARF_SID_OFFSET 0x234
+#define PARF_BDF_TRANSLATE_CFG 0x24C
+#define PARF_DEVICE_TYPE 0x1000
+#define PARF_BDF_TO_SID_TABLE_N 0x2000
-#define PCIE20_ELBI_SYS_CTRL 0x04
-#define PCIE20_ELBI_SYS_CTRL_LT_ENABLE BIT(0)
+#define ELBI_SYS_CTRL 0x04
+#define ELBI_SYS_CTRL_LT_ENABLE BIT(0)
-#define PCIE20_AXI_MSTR_RESP_COMP_CTRL0 0x818
+#define AXI_MSTR_RESP_COMP_CTRL0 0x818
#define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K 0x4
#define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_4K 0x5
-#define PCIE20_AXI_MSTR_RESP_COMP_CTRL1 0x81c
+#define AXI_MSTR_RESP_COMP_CTRL1 0x81c
#define CFG_BRIDGE_SB_INIT BIT(0)
#define PCIE_CAP_SLOT_POWER_LIMIT_VAL FIELD_PREP(PCI_EXP_SLTCAP_SPLV, \
@@ -93,30 +93,28 @@
PCIE_CAP_SLOT_POWER_LIMIT_VAL | \
PCIE_CAP_SLOT_POWER_LIMIT_SCALE)
-#define PCIE20_PARF_Q2A_FLUSH 0x1AC
+#define PARF_Q2A_FLUSH 0x1AC
-#define PCIE20_MISC_CONTROL_1_REG 0x8BC
+#define MISC_CONTROL_1_REG 0x8BC
#define DBI_RO_WR_EN 1
#define PERST_DELAY_US 1000
/* PARF registers */
-#define PCIE20_PARF_PCS_DEEMPH 0x34
+#define PARF_PCS_DEEMPH 0x34
#define PCS_DEEMPH_TX_DEEMPH_GEN1(x) ((x) << 16)
#define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) ((x) << 8)
#define PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(x) ((x) << 0)
-#define PCIE20_PARF_PCS_SWING 0x38
+#define PARF_PCS_SWING 0x38
#define PCS_SWING_TX_SWING_FULL(x) ((x) << 8)
#define PCS_SWING_TX_SWING_LOW(x) ((x) << 0)
-#define PCIE20_PARF_CONFIG_BITS 0x50
+#define PARF_CONFIG_BITS 0x50
#define PHY_RX0_EQ(x) ((x) << 24)
-#define PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE 0x358
+#define PARF_SLV_ADDR_SPACE_SIZE 0x358
#define SLV_ADDR_SPACE_SZ 0x10000000
-#define PCIE20_LNK_CONTROL2_LINK_STATUS2 0xa0
-
#define DEVICE_TYPE_RC 0x4
#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
@@ -261,9 +259,9 @@ static void qcom_pcie_2_1_0_ltssm_enable(struct qcom_pcie *pcie)
u32 val;
/* enable link training */
- val = readl(pcie->elbi + PCIE20_ELBI_SYS_CTRL);
- val |= PCIE20_ELBI_SYS_CTRL_LT_ENABLE;
- writel(val, pcie->elbi + PCIE20_ELBI_SYS_CTRL);
+ val = readl(pcie->elbi + ELBI_SYS_CTRL);
+ val |= ELBI_SYS_CTRL_LT_ENABLE;
+ writel(val, pcie->elbi + ELBI_SYS_CTRL);
}
static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie)
@@ -333,7 +331,7 @@ static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie)
reset_control_assert(res->ext_reset);
reset_control_assert(res->phy_reset);
- writel(1, pcie->parf + PCIE20_PARF_PHY_CTRL);
+ writel(1, pcie->parf + PARF_PHY_CTRL);
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
}
@@ -423,9 +421,9 @@ static int qcom_pcie_post_init_2_1_0(struct qcom_pcie *pcie)
int ret;
/* enable PCIe clocks and resets */
- val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+ val = readl(pcie->parf + PARF_PHY_CTRL);
val &= ~BIT(0);
- writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+ writel(val, pcie->parf + PARF_PHY_CTRL);
ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
if (ret)
@@ -436,37 +434,37 @@ static int qcom_pcie_post_init_2_1_0(struct qcom_pcie *pcie)
writel(PCS_DEEMPH_TX_DEEMPH_GEN1(24) |
PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(24) |
PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(34),
- pcie->parf + PCIE20_PARF_PCS_DEEMPH);
+ pcie->parf + PARF_PCS_DEEMPH);
writel(PCS_SWING_TX_SWING_FULL(120) |
PCS_SWING_TX_SWING_LOW(120),
- pcie->parf + PCIE20_PARF_PCS_SWING);
- writel(PHY_RX0_EQ(4), pcie->parf + PCIE20_PARF_CONFIG_BITS);
+ pcie->parf + PARF_PCS_SWING);
+ writel(PHY_RX0_EQ(4), pcie->parf + PARF_CONFIG_BITS);
}
if (of_device_is_compatible(node, "qcom,pcie-ipq8064")) {
/* set TX termination offset */
- val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+ val = readl(pcie->parf + PARF_PHY_CTRL);
val &= ~PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK;
val |= PHY_CTRL_PHY_TX0_TERM_OFFSET(7);
- writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+ writel(val, pcie->parf + PARF_PHY_CTRL);
}
/* enable external reference clock */
- val = readl(pcie->parf + PCIE20_PARF_PHY_REFCLK);
+ val = readl(pcie->parf + PARF_PHY_REFCLK);
/* USE_PAD is required only for ipq806x */
if (!of_device_is_compatible(node, "qcom,pcie-apq8064"))
val &= ~PHY_REFCLK_USE_PAD;
val |= PHY_REFCLK_SSP_EN;
- writel(val, pcie->parf + PCIE20_PARF_PHY_REFCLK);
+ writel(val, pcie->parf + PARF_PHY_REFCLK);
/* wait for clock acquisition */
usleep_range(1000, 1500);
/* Set the Max TLP size to 2K, instead of using default of 4K */
writel(CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K,
- pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL0);
+ pci->dbi_base + AXI_MSTR_RESP_COMP_CTRL0);
writel(CFG_BRIDGE_SB_INIT,
- pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL1);
+ pci->dbi_base + AXI_MSTR_RESP_COMP_CTRL1);
return 0;
}
@@ -574,13 +572,13 @@ static int qcom_pcie_init_1_0_0(struct qcom_pcie *pcie)
static int qcom_pcie_post_init_1_0_0(struct qcom_pcie *pcie)
{
/* change DBI base address */
- writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
+ writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
if (IS_ENABLED(CONFIG_PCI_MSI)) {
- u32 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
+ u32 val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT);
val |= BIT(31);
- writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
+ writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT);
}
return 0;
@@ -591,9 +589,9 @@ static void qcom_pcie_2_3_2_ltssm_enable(struct qcom_pcie *pcie)
u32 val;
/* enable link training */
- val = readl(pcie->parf + PCIE20_PARF_LTSSM);
+ val = readl(pcie->parf + PARF_LTSSM);
val |= BIT(8);
- writel(val, pcie->parf + PCIE20_PARF_LTSSM);
+ writel(val, pcie->parf + PARF_LTSSM);
}
static int qcom_pcie_get_resources_2_3_2(struct qcom_pcie *pcie)
@@ -698,25 +696,25 @@ static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie)
u32 val;
/* enable PCIe clocks and resets */
- val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+ val = readl(pcie->parf + PARF_PHY_CTRL);
val &= ~BIT(0);
- writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+ writel(val, pcie->parf + PARF_PHY_CTRL);
/* change DBI base address */
- writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
+ writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
/* MAC PHY_POWERDOWN MUX DISABLE */
- val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
+ val = readl(pcie->parf + PARF_SYS_CTRL);
val &= ~BIT(29);
- writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
+ writel(val, pcie->parf + PARF_SYS_CTRL);
- val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
+ val = readl(pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
val |= BIT(4);
- writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
+ writel(val, pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
- val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
+ val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
val |= BIT(31);
- writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
+ writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
return 0;
}
@@ -977,25 +975,25 @@ static int qcom_pcie_post_init_2_4_0(struct qcom_pcie *pcie)
u32 val;
/* enable PCIe clocks and resets */
- val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+ val = readl(pcie->parf + PARF_PHY_CTRL);
val &= ~BIT(0);
- writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+ writel(val, pcie->parf + PARF_PHY_CTRL);
/* change DBI base address */
- writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
+ writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
/* MAC PHY_POWERDOWN MUX DISABLE */
- val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
+ val = readl(pcie->parf + PARF_SYS_CTRL);
val &= ~BIT(29);
- writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
+ writel(val, pcie->parf + PARF_SYS_CTRL);
- val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
+ val = readl(pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
val |= BIT(4);
- writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
+ writel(val, pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
- val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
+ val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
val |= BIT(31);
- writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
+ writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
return 0;
}
@@ -1140,22 +1138,22 @@ static int qcom_pcie_post_init_2_3_3(struct qcom_pcie *pcie)
u32 val;
writel(SLV_ADDR_SPACE_SZ,
- pcie->parf + PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE);
+ pcie->parf + PARF_SLV_ADDR_SPACE_SIZE_2_3_3);
- val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+ val = readl(pcie->parf + PARF_PHY_CTRL);
val &= ~BIT(0);
- writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+ writel(val, pcie->parf + PARF_PHY_CTRL);
- writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
+ writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
writel(MST_WAKEUP_EN | SLV_WAKEUP_EN | MSTR_ACLK_CGC_DIS
| SLV_ACLK_CGC_DIS | CORE_CLK_CGC_DIS |
AUX_PWR_DET | L23_CLK_RMV_DIS | L1_CLK_RMV_DIS,
- pcie->parf + PCIE20_PARF_SYS_CTRL);
- writel(0, pcie->parf + PCIE20_PARF_Q2A_FLUSH);
+ pcie->parf + PARF_SYS_CTRL);
+ writel(0, pcie->parf + PARF_Q2A_FLUSH);
writel(PCI_COMMAND_MASTER, pci->dbi_base + PCI_COMMAND);
- writel(DBI_RO_WR_EN, pci->dbi_base + PCIE20_MISC_CONTROL_1_REG);
+ writel(DBI_RO_WR_EN, pci->dbi_base + MISC_CONTROL_1_REG);
writel(PCIE_CAP_SLOT_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP);
val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP);
@@ -1255,34 +1253,34 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
usleep_range(1000, 1500);
/* configure PCIe to RC mode */
- writel(DEVICE_TYPE_RC, pcie->parf + PCIE20_PARF_DEVICE_TYPE);
+ writel(DEVICE_TYPE_RC, pcie->parf + PARF_DEVICE_TYPE);
/* enable PCIe clocks and resets */
- val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+ val = readl(pcie->parf + PARF_PHY_CTRL);
val &= ~BIT(0);
- writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+ writel(val, pcie->parf + PARF_PHY_CTRL);
/* change DBI base address */
- writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
+ writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
/* MAC PHY_POWERDOWN MUX DISABLE */
- val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
+ val = readl(pcie->parf + PARF_SYS_CTRL);
val &= ~BIT(29);
- writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
+ writel(val, pcie->parf + PARF_SYS_CTRL);
- val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
+ val = readl(pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
val |= BIT(4);
- writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
+ writel(val, pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
/* Enable L1 and L1SS */
- val = readl(pcie->parf + PCIE20_PARF_PM_CTRL);
+ val = readl(pcie->parf + PARF_PM_CTRL);
val &= ~REQ_NOT_ENTR_L1;
- writel(val, pcie->parf + PCIE20_PARF_PM_CTRL);
+ writel(val, pcie->parf + PARF_PM_CTRL);
if (IS_ENABLED(CONFIG_PCI_MSI)) {
- val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
+ val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT);
val |= BIT(31);
- writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
+ writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT);
}
return 0;
@@ -1371,17 +1369,17 @@ static int qcom_pcie_post_init_2_9_0(struct qcom_pcie *pcie)
int i;
writel(SLV_ADDR_SPACE_SZ,
- pcie->parf + PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE);
+ pcie->parf + PARF_SLV_ADDR_SPACE_SIZE);
- val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+ val = readl(pcie->parf + PARF_PHY_CTRL);
val &= ~BIT(0);
- writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+ writel(val, pcie->parf + PARF_PHY_CTRL);
- writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
+ writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
- writel(DEVICE_TYPE_RC, pcie->parf + PCIE20_PARF_DEVICE_TYPE);
+ writel(DEVICE_TYPE_RC, pcie->parf + PARF_DEVICE_TYPE);
writel(BYPASS | MSTR_AXI_CLK_EN | AHB_CLK_EN,
- pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
+ pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
writel(GEN3_RELATED_OFF_RXEQ_RGRDLESS_RXTS |
GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL,
pci->dbi_base + GEN3_RELATED_OFF);
@@ -1389,9 +1387,9 @@ static int qcom_pcie_post_init_2_9_0(struct qcom_pcie *pcie)
writel(MST_WAKEUP_EN | SLV_WAKEUP_EN | MSTR_ACLK_CGC_DIS |
SLV_ACLK_CGC_DIS | CORE_CLK_CGC_DIS |
AUX_PWR_DET | L23_CLK_RMV_DIS | L1_CLK_RMV_DIS,
- pcie->parf + PCIE20_PARF_SYS_CTRL);
+ pcie->parf + PARF_SYS_CTRL);
- writel(0, pcie->parf + PCIE20_PARF_Q2A_FLUSH);
+ writel(0, pcie->parf + PARF_Q2A_FLUSH);
dw_pcie_dbi_ro_wr_en(pci);
writel(PCIE_CAP_SLOT_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP);
@@ -1404,7 +1402,7 @@ static int qcom_pcie_post_init_2_9_0(struct qcom_pcie *pcie)
PCI_EXP_DEVCTL2);
for (i = 0; i < 256; i++)
- writel(0, pcie->parf + PCIE20_PARF_BDF_TO_SID_TABLE_N + (4 * i));
+ writel(0, pcie->parf + PARF_BDF_TO_SID_TABLE_N + (4 * i));
return 0;
}
@@ -1426,7 +1424,7 @@ static int qcom_pcie_config_sid_sm8250(struct qcom_pcie *pcie)
u32 smmu_sid;
u32 smmu_sid_len;
} *map;
- void __iomem *bdf_to_sid_base = pcie->parf + PCIE20_PARF_BDF_TO_SID_TABLE_N;
+ void __iomem *bdf_to_sid_base = pcie->parf + PARF_BDF_TO_SID_TABLE_N;
struct device *dev = pcie->pci->dev;
u8 qcom_pcie_crc8_table[CRC8_TABLE_SIZE];
int i, nr_map, size = 0;
--
2.25.1
Sorting the registers and their bit definitions will make it easier to add
more definitions in the future and it also helps in maintenance.
While at it, let's also group the registers and bit definitions separately
as done in the pcie-qcom-ep driver.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 108 ++++++++++++++-----------
1 file changed, 63 insertions(+), 45 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 6930bc9ceeb5..9223ca76640d 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -33,7 +33,36 @@
#include "../../pci.h"
#include "pcie-designware.h"
+/* PARF registers */
#define PARF_SYS_CTRL 0x00
+#define PARF_PM_CTRL 0x20
+#define PARF_PCS_DEEMPH 0x34
+#define PARF_PCS_SWING 0x38
+#define PARF_PHY_CTRL 0x40
+#define PARF_PHY_REFCLK 0x4C
+#define PARF_CONFIG_BITS 0x50
+#define PARF_DBI_BASE_ADDR 0x168
+#define PARF_SLV_ADDR_SPACE_SIZE_2_3_3 0x16C /* Register offset specific to IP ver 2.3.3 */
+#define PARF_MHI_CLOCK_RESET_CTRL 0x174
+#define PARF_AXI_MSTR_WR_ADDR_HALT 0x178
+#define PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1A8
+#define PARF_Q2A_FLUSH 0x1AC
+#define PARF_LTSSM 0x1B0
+#define PARF_SID_OFFSET 0x234
+#define PARF_BDF_TRANSLATE_CFG 0x24C
+#define PARF_SLV_ADDR_SPACE_SIZE 0x358
+#define PARF_DEVICE_TYPE 0x1000
+#define PARF_BDF_TO_SID_TABLE_N 0x2000
+
+/* ELBI registers */
+#define ELBI_SYS_CTRL 0x04
+
+/* DBI registers */
+#define AXI_MSTR_RESP_COMP_CTRL0 0x818
+#define AXI_MSTR_RESP_COMP_CTRL1 0x81c
+#define MISC_CONTROL_1_REG 0x8BC
+
+/* PARF_SYS_CTRL register fields */
#define MST_WAKEUP_EN BIT(13)
#define SLV_WAKEUP_EN BIT(12)
#define MSTR_ACLK_CGC_DIS BIT(10)
@@ -43,45 +72,56 @@
#define L23_CLK_RMV_DIS BIT(2)
#define L1_CLK_RMV_DIS BIT(1)
-#define PARF_PM_CTRL 0x20
+/* PARF_PM_CTRL register fields */
#define REQ_NOT_ENTR_L1 BIT(5)
-#define PARF_PHY_CTRL 0x40
+/* PARF_PCS_DEEMPH register fields */
+#define PCS_DEEMPH_TX_DEEMPH_GEN1(x) ((x) << 16)
+#define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) ((x) << 8)
+#define PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(x) ((x) << 0)
+
+/* PARF_PCS_SWING register fields */
+#define PCS_SWING_TX_SWING_FULL(x) ((x) << 8)
+#define PCS_SWING_TX_SWING_LOW(x) ((x) << 0)
+
+/* PARF_PHY_CTRL register fields */
#define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK GENMASK(20, 16)
#define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) ((x) << 16)
-#define PARF_PHY_REFCLK 0x4C
+/* PARF_PHY_REFCLK register fields */
#define PHY_REFCLK_SSP_EN BIT(16)
#define PHY_REFCLK_USE_PAD BIT(12)
-#define PARF_DBI_BASE_ADDR 0x168
-#define PARF_SLV_ADDR_SPACE_SIZE_2_3_3 0x16C /* Register offset specific to IP rev 2.3.3 */
-#define PARF_MHI_CLOCK_RESET_CTRL 0x174
+/* PARF_CONFIG_BITS register fields */
+#define PHY_RX0_EQ(x) ((x) << 24)
+
+/* PARF_SLV_ADDR_SPACE_SIZE register value */
+#define SLV_ADDR_SPACE_SZ 0x10000000
+
+/* PARF_MHI_CLOCK_RESET_CTRL register fields */
#define AHB_CLK_EN BIT(0)
#define MSTR_AXI_CLK_EN BIT(1)
#define BYPASS BIT(4)
-#define PARF_AXI_MSTR_WR_ADDR_HALT 0x178
-#define PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1A8
-#define PARF_LTSSM 0x1B0
-#define PARF_SID_OFFSET 0x234
-#define PARF_BDF_TRANSLATE_CFG 0x24C
-#define PARF_DEVICE_TYPE 0x1000
-#define PARF_BDF_TO_SID_TABLE_N 0x2000
+/* PARF_DEVICE_TYPE register fields */
+#define DEVICE_TYPE_RC 0x4
-#define ELBI_SYS_CTRL 0x04
+/* ELBI_SYS_CTRL register fields */
#define ELBI_SYS_CTRL_LT_ENABLE BIT(0)
-#define AXI_MSTR_RESP_COMP_CTRL0 0x818
+/* AXI_MSTR_RESP_COMP_CTRL0 register fields */
#define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K 0x4
#define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_4K 0x5
-#define AXI_MSTR_RESP_COMP_CTRL1 0x81c
+
+/* AXI_MSTR_RESP_COMP_CTRL1 register fields */
#define CFG_BRIDGE_SB_INIT BIT(0)
-#define PCIE_CAP_SLOT_POWER_LIMIT_VAL FIELD_PREP(PCI_EXP_SLTCAP_SPLV, \
- 250)
-#define PCIE_CAP_SLOT_POWER_LIMIT_SCALE FIELD_PREP(PCI_EXP_SLTCAP_SPLS, \
- 1)
+/* MISC_CONTROL_1_REG register fields */
+#define DBI_RO_WR_EN 1
+
+/* PCI_EXP_SLTCAP register fields */
+#define PCIE_CAP_SLOT_POWER_LIMIT_VAL FIELD_PREP(PCI_EXP_SLTCAP_SPLV, 250)
+#define PCIE_CAP_SLOT_POWER_LIMIT_SCALE FIELD_PREP(PCI_EXP_SLTCAP_SPLS, 1)
#define PCIE_CAP_SLOT_VAL (PCI_EXP_SLTCAP_ABP | \
PCI_EXP_SLTCAP_PCP | \
PCI_EXP_SLTCAP_MRLSP | \
@@ -93,34 +133,12 @@
PCIE_CAP_SLOT_POWER_LIMIT_VAL | \
PCIE_CAP_SLOT_POWER_LIMIT_SCALE)
-#define PARF_Q2A_FLUSH 0x1AC
-
-#define MISC_CONTROL_1_REG 0x8BC
-#define DBI_RO_WR_EN 1
-
#define PERST_DELAY_US 1000
-/* PARF registers */
-#define PARF_PCS_DEEMPH 0x34
-#define PCS_DEEMPH_TX_DEEMPH_GEN1(x) ((x) << 16)
-#define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) ((x) << 8)
-#define PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(x) ((x) << 0)
-
-#define PARF_PCS_SWING 0x38
-#define PCS_SWING_TX_SWING_FULL(x) ((x) << 8)
-#define PCS_SWING_TX_SWING_LOW(x) ((x) << 0)
-
-#define PARF_CONFIG_BITS 0x50
-#define PHY_RX0_EQ(x) ((x) << 24)
-
-#define PARF_SLV_ADDR_SPACE_SIZE 0x358
-#define SLV_ADDR_SPACE_SZ 0x10000000
-
-#define DEVICE_TYPE_RC 0x4
-#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
-#define QCOM_PCIE_2_1_0_MAX_CLOCKS 5
+#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
+#define QCOM_PCIE_2_1_0_MAX_CLOCKS 5
-#define QCOM_PCIE_CRC8_POLYNOMIAL (BIT(2) | BIT(1) | BIT(0))
+#define QCOM_PCIE_CRC8_POLYNOMIAL (BIT(2) | BIT(1) | BIT(0))
struct qcom_pcie_resources_2_1_0 {
struct clk_bulk_data clks[QCOM_PCIE_2_1_0_MAX_CLOCKS];
--
2.25.1
To maintain uniformity throughout the driver and also to make the code
easier to read, let's make use of bitfield definitions for register fields.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 9223ca76640d..e9f4c70b719a 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -76,24 +76,24 @@
#define REQ_NOT_ENTR_L1 BIT(5)
/* PARF_PCS_DEEMPH register fields */
-#define PCS_DEEMPH_TX_DEEMPH_GEN1(x) ((x) << 16)
-#define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) ((x) << 8)
-#define PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(x) ((x) << 0)
+#define PCS_DEEMPH_TX_DEEMPH_GEN1(x) FIELD_PREP(GENMASK(21, 16), x)
+#define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) FIELD_PREP(GENMASK(13, 8), x)
+#define PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(x) FIELD_PREP(GENMASK(5, 0), x)
/* PARF_PCS_SWING register fields */
-#define PCS_SWING_TX_SWING_FULL(x) ((x) << 8)
-#define PCS_SWING_TX_SWING_LOW(x) ((x) << 0)
+#define PCS_SWING_TX_SWING_FULL(x) FIELD_PREP(GENMASK(14, 8), x)
+#define PCS_SWING_TX_SWING_LOW(x) FIELD_PREP(GENMASK(6, 0), x)
/* PARF_PHY_CTRL register fields */
#define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK GENMASK(20, 16)
-#define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) ((x) << 16)
+#define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) FIELD_PREP(PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK, x)
/* PARF_PHY_REFCLK register fields */
#define PHY_REFCLK_SSP_EN BIT(16)
#define PHY_REFCLK_USE_PAD BIT(12)
/* PARF_CONFIG_BITS register fields */
-#define PHY_RX0_EQ(x) ((x) << 24)
+#define PHY_RX0_EQ(x) FIELD_PREP(GENMASK(26, 24), x)
/* PARF_SLV_ADDR_SPACE_SIZE register value */
#define SLV_ADDR_SPACE_SZ 0x10000000
--
2.25.1
Some of the registers are changed using hardcoded bitfields without macros.
This provides no information on what the register setting is about. So add
the macros to those fields for making the code more understandable.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 42 +++++++++++++++-----------
1 file changed, 25 insertions(+), 17 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index e9f4c70b719a..926a531fda3a 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -63,6 +63,7 @@
#define MISC_CONTROL_1_REG 0x8BC
/* PARF_SYS_CTRL register fields */
+#define MAC_PHY_POWERDOWN_IN_P2_D_MUX_EN BIT(29)
#define MST_WAKEUP_EN BIT(13)
#define SLV_WAKEUP_EN BIT(12)
#define MSTR_ACLK_CGC_DIS BIT(10)
@@ -87,6 +88,7 @@
/* PARF_PHY_CTRL register fields */
#define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK GENMASK(20, 16)
#define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) FIELD_PREP(PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK, x)
+#define PHY_TEST_PWR_DOWN BIT(0)
/* PARF_PHY_REFCLK register fields */
#define PHY_REFCLK_SSP_EN BIT(16)
@@ -103,6 +105,12 @@
#define MSTR_AXI_CLK_EN BIT(1)
#define BYPASS BIT(4)
+/* PARF_AXI_MSTR_WR_ADDR_HALT register fields */
+#define EN BIT(31)
+
+/* PARF_LTSSM register fields */
+#define LTSSM_EN BIT(8)
+
/* PARF_DEVICE_TYPE register fields */
#define DEVICE_TYPE_RC 0x4
@@ -440,7 +448,7 @@ static int qcom_pcie_post_init_2_1_0(struct qcom_pcie *pcie)
/* enable PCIe clocks and resets */
val = readl(pcie->parf + PARF_PHY_CTRL);
- val &= ~BIT(0);
+ val &= ~PHY_TEST_PWR_DOWN;
writel(val, pcie->parf + PARF_PHY_CTRL);
ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
@@ -595,7 +603,7 @@ static int qcom_pcie_post_init_1_0_0(struct qcom_pcie *pcie)
if (IS_ENABLED(CONFIG_PCI_MSI)) {
u32 val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT);
- val |= BIT(31);
+ val |= EN;
writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT);
}
@@ -608,7 +616,7 @@ static void qcom_pcie_2_3_2_ltssm_enable(struct qcom_pcie *pcie)
/* enable link training */
val = readl(pcie->parf + PARF_LTSSM);
- val |= BIT(8);
+ val |= LTSSM_EN;
writel(val, pcie->parf + PARF_LTSSM);
}
@@ -715,7 +723,7 @@ static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie)
/* enable PCIe clocks and resets */
val = readl(pcie->parf + PARF_PHY_CTRL);
- val &= ~BIT(0);
+ val &= ~PHY_TEST_PWR_DOWN;
writel(val, pcie->parf + PARF_PHY_CTRL);
/* change DBI base address */
@@ -723,15 +731,15 @@ static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie)
/* MAC PHY_POWERDOWN MUX DISABLE */
val = readl(pcie->parf + PARF_SYS_CTRL);
- val &= ~BIT(29);
+ val &= ~MAC_PHY_POWERDOWN_IN_P2_D_MUX_EN;
writel(val, pcie->parf + PARF_SYS_CTRL);
val = readl(pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
- val |= BIT(4);
+ val |= BYPASS;
writel(val, pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
- val |= BIT(31);
+ val |= EN;
writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
return 0;
@@ -994,7 +1002,7 @@ static int qcom_pcie_post_init_2_4_0(struct qcom_pcie *pcie)
/* enable PCIe clocks and resets */
val = readl(pcie->parf + PARF_PHY_CTRL);
- val &= ~BIT(0);
+ val &= ~PHY_TEST_PWR_DOWN;
writel(val, pcie->parf + PARF_PHY_CTRL);
/* change DBI base address */
@@ -1002,15 +1010,15 @@ static int qcom_pcie_post_init_2_4_0(struct qcom_pcie *pcie)
/* MAC PHY_POWERDOWN MUX DISABLE */
val = readl(pcie->parf + PARF_SYS_CTRL);
- val &= ~BIT(29);
+ val &= ~MAC_PHY_POWERDOWN_IN_P2_D_MUX_EN;
writel(val, pcie->parf + PARF_SYS_CTRL);
val = readl(pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
- val |= BIT(4);
+ val |= BYPASS;
writel(val, pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
- val |= BIT(31);
+ val |= EN;
writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
return 0;
@@ -1159,7 +1167,7 @@ static int qcom_pcie_post_init_2_3_3(struct qcom_pcie *pcie)
pcie->parf + PARF_SLV_ADDR_SPACE_SIZE_2_3_3);
val = readl(pcie->parf + PARF_PHY_CTRL);
- val &= ~BIT(0);
+ val &= ~PHY_TEST_PWR_DOWN;
writel(val, pcie->parf + PARF_PHY_CTRL);
writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
@@ -1275,7 +1283,7 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
/* enable PCIe clocks and resets */
val = readl(pcie->parf + PARF_PHY_CTRL);
- val &= ~BIT(0);
+ val &= ~PHY_TEST_PWR_DOWN;
writel(val, pcie->parf + PARF_PHY_CTRL);
/* change DBI base address */
@@ -1283,11 +1291,11 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
/* MAC PHY_POWERDOWN MUX DISABLE */
val = readl(pcie->parf + PARF_SYS_CTRL);
- val &= ~BIT(29);
+ val &= ~MAC_PHY_POWERDOWN_IN_P2_D_MUX_EN;
writel(val, pcie->parf + PARF_SYS_CTRL);
val = readl(pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
- val |= BIT(4);
+ val |= BYPASS;
writel(val, pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
/* Enable L1 and L1SS */
@@ -1297,7 +1305,7 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
if (IS_ENABLED(CONFIG_PCI_MSI)) {
val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT);
- val |= BIT(31);
+ val |= EN;
writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT);
}
@@ -1390,7 +1398,7 @@ static int qcom_pcie_post_init_2_9_0(struct qcom_pcie *pcie)
pcie->parf + PARF_SLV_ADDR_SPACE_SIZE);
val = readl(pcie->parf + PARF_PHY_CTRL);
- val &= ~BIT(0);
+ val &= ~PHY_TEST_PWR_DOWN;
writel(val, pcie->parf + PARF_PHY_CTRL);
writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
--
2.25.1
All the resets are asserted and deasserted at the same time. So the bulk
reset APIs can be used to handle them together. This simplifies the code
a lot.
While at it, let's also move the qcom_pcie_resources_2_1_0 struct below
qcom_pcie_resources_1_0_0 to keep it sorted.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 129 +++++++------------------
1 file changed, 34 insertions(+), 95 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 4179ac973147..2d9116464842 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -143,22 +143,8 @@
#define PERST_DELAY_US 1000
-#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
-#define QCOM_PCIE_2_1_0_MAX_CLOCKS 5
-
#define QCOM_PCIE_CRC8_POLYNOMIAL (BIT(2) | BIT(1) | BIT(0))
-struct qcom_pcie_resources_2_1_0 {
- struct clk_bulk_data clks[QCOM_PCIE_2_1_0_MAX_CLOCKS];
- struct reset_control *pci_reset;
- struct reset_control *axi_reset;
- struct reset_control *ahb_reset;
- struct reset_control *por_reset;
- struct reset_control *phy_reset;
- struct reset_control *ext_reset;
- struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
-};
-
struct qcom_pcie_resources_1_0_0 {
struct clk *iface;
struct clk *aux;
@@ -168,6 +154,16 @@ struct qcom_pcie_resources_1_0_0 {
struct regulator *vdda;
};
+#define QCOM_PCIE_2_1_0_MAX_CLOCKS 5
+#define QCOM_PCIE_2_1_0_MAX_RESETS 6
+#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
+struct qcom_pcie_resources_2_1_0 {
+ struct clk_bulk_data clks[QCOM_PCIE_2_1_0_MAX_CLOCKS];
+ struct reset_control_bulk_data resets[QCOM_PCIE_2_1_0_MAX_RESETS];
+ int num_resets;
+ struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
+};
+
#define QCOM_PCIE_2_3_2_MAX_SUPPLY 2
struct qcom_pcie_resources_2_3_2 {
struct clk *aux_clk;
@@ -295,6 +291,7 @@ static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie)
struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
struct dw_pcie *pci = pcie->pci;
struct device *dev = pci->dev;
+ bool is_apq = of_device_is_compatible(dev->of_node, "qcom,pcie-apq8064");
int ret;
res->supplies[0].supply = "vdda";
@@ -321,28 +318,20 @@ static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie)
if (ret < 0)
return ret;
- res->pci_reset = devm_reset_control_get_exclusive(dev, "pci");
- if (IS_ERR(res->pci_reset))
- return PTR_ERR(res->pci_reset);
-
- res->axi_reset = devm_reset_control_get_exclusive(dev, "axi");
- if (IS_ERR(res->axi_reset))
- return PTR_ERR(res->axi_reset);
-
- res->ahb_reset = devm_reset_control_get_exclusive(dev, "ahb");
- if (IS_ERR(res->ahb_reset))
- return PTR_ERR(res->ahb_reset);
+ res->resets[0].id = "pci";
+ res->resets[1].id = "axi";
+ res->resets[2].id = "ahb";
+ res->resets[3].id = "por";
+ res->resets[4].id = "phy";
+ res->resets[5].id = "ext";
- res->por_reset = devm_reset_control_get_exclusive(dev, "por");
- if (IS_ERR(res->por_reset))
- return PTR_ERR(res->por_reset);
-
- res->ext_reset = devm_reset_control_get_optional_exclusive(dev, "ext");
- if (IS_ERR(res->ext_reset))
- return PTR_ERR(res->ext_reset);
+ /* ext is optional on APQ8016 */
+ res->num_resets = is_apq ? 5 : 6;
+ ret = devm_reset_control_bulk_get_exclusive(dev, res->num_resets, res->resets);
+ if (ret < 0)
+ return ret;
- res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
- return PTR_ERR_OR_ZERO(res->phy_reset);
+ return 0;
}
static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie)
@@ -350,12 +339,7 @@ static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie)
struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
- reset_control_assert(res->pci_reset);
- reset_control_assert(res->axi_reset);
- reset_control_assert(res->ahb_reset);
- reset_control_assert(res->por_reset);
- reset_control_assert(res->ext_reset);
- reset_control_assert(res->phy_reset);
+ reset_control_bulk_assert(res->num_resets, res->resets);
writel(1, pcie->parf + PARF_PHY_CTRL);
@@ -370,12 +354,11 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
int ret;
/* reset the PCIe interface as uboot can leave it undefined state */
- reset_control_assert(res->pci_reset);
- reset_control_assert(res->axi_reset);
- reset_control_assert(res->ahb_reset);
- reset_control_assert(res->por_reset);
- reset_control_assert(res->ext_reset);
- reset_control_assert(res->phy_reset);
+ ret = reset_control_bulk_assert(res->num_resets, res->resets);
+ if (ret < 0) {
+ dev_err(dev, "cannot assert resets\n");
+ return ret;
+ }
ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
if (ret < 0) {
@@ -383,58 +366,14 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
return ret;
}
- ret = reset_control_deassert(res->ahb_reset);
- if (ret) {
- dev_err(dev, "cannot deassert ahb reset\n");
- goto err_deassert_ahb;
- }
-
- ret = reset_control_deassert(res->ext_reset);
- if (ret) {
- dev_err(dev, "cannot deassert ext reset\n");
- goto err_deassert_ext;
- }
-
- ret = reset_control_deassert(res->phy_reset);
- if (ret) {
- dev_err(dev, "cannot deassert phy reset\n");
- goto err_deassert_phy;
- }
-
- ret = reset_control_deassert(res->pci_reset);
- if (ret) {
- dev_err(dev, "cannot deassert pci reset\n");
- goto err_deassert_pci;
- }
-
- ret = reset_control_deassert(res->por_reset);
- if (ret) {
- dev_err(dev, "cannot deassert por reset\n");
- goto err_deassert_por;
- }
-
- ret = reset_control_deassert(res->axi_reset);
- if (ret) {
- dev_err(dev, "cannot deassert axi reset\n");
- goto err_deassert_axi;
+ ret = reset_control_bulk_deassert(res->num_resets, res->resets);
+ if (ret < 0) {
+ dev_err(dev, "cannot deassert resets\n");
+ regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
+ return ret;
}
return 0;
-
-err_deassert_axi:
- reset_control_assert(res->por_reset);
-err_deassert_por:
- reset_control_assert(res->pci_reset);
-err_deassert_pci:
- reset_control_assert(res->phy_reset);
-err_deassert_phy:
- reset_control_assert(res->ext_reset);
-err_deassert_ext:
- reset_control_assert(res->ahb_reset);
-err_deassert_ahb:
- regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
-
- return ret;
}
static int qcom_pcie_post_init_2_1_0(struct qcom_pcie *pcie)
--
2.25.1
To maintain uniformity, let's use lower case for representing hexadecimal
numbers.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 926a531fda3a..4179ac973147 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -39,17 +39,17 @@
#define PARF_PCS_DEEMPH 0x34
#define PARF_PCS_SWING 0x38
#define PARF_PHY_CTRL 0x40
-#define PARF_PHY_REFCLK 0x4C
+#define PARF_PHY_REFCLK 0x4c
#define PARF_CONFIG_BITS 0x50
#define PARF_DBI_BASE_ADDR 0x168
-#define PARF_SLV_ADDR_SPACE_SIZE_2_3_3 0x16C /* Register offset specific to IP ver 2.3.3 */
+#define PARF_SLV_ADDR_SPACE_SIZE_2_3_3 0x16c /* Register offset specific to IP ver 2.3.3 */
#define PARF_MHI_CLOCK_RESET_CTRL 0x174
#define PARF_AXI_MSTR_WR_ADDR_HALT 0x178
-#define PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1A8
-#define PARF_Q2A_FLUSH 0x1AC
-#define PARF_LTSSM 0x1B0
+#define PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1a8
+#define PARF_Q2A_FLUSH 0x1ac
+#define PARF_LTSSM 0x1b0
#define PARF_SID_OFFSET 0x234
-#define PARF_BDF_TRANSLATE_CFG 0x24C
+#define PARF_BDF_TRANSLATE_CFG 0x24c
#define PARF_SLV_ADDR_SPACE_SIZE 0x358
#define PARF_DEVICE_TYPE 0x1000
#define PARF_BDF_TO_SID_TABLE_N 0x2000
@@ -60,7 +60,7 @@
/* DBI registers */
#define AXI_MSTR_RESP_COMP_CTRL0 0x818
#define AXI_MSTR_RESP_COMP_CTRL1 0x81c
-#define MISC_CONTROL_1_REG 0x8BC
+#define MISC_CONTROL_1_REG 0x8bc
/* PARF_SYS_CTRL register fields */
#define MAC_PHY_POWERDOWN_IN_P2_D_MUX_EN BIT(29)
--
2.25.1
All the clocks are enabled and disabled at the same time. So the bulk clock
APIs can be used to handle them together. This simplifies the code a lot.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 72 +++++++-------------------
1 file changed, 19 insertions(+), 53 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 2d9116464842..0bb27d3c95a0 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -145,11 +145,9 @@
#define QCOM_PCIE_CRC8_POLYNOMIAL (BIT(2) | BIT(1) | BIT(0))
+#define QCOM_PCIE_1_0_0_MAX_CLOCKS 4
struct qcom_pcie_resources_1_0_0 {
- struct clk *iface;
- struct clk *aux;
- struct clk *master_bus;
- struct clk *slave_bus;
+ struct clk_bulk_data clks[QCOM_PCIE_1_0_0_MAX_CLOCKS];
struct reset_control *core;
struct regulator *vdda;
};
@@ -439,26 +437,20 @@ static int qcom_pcie_get_resources_1_0_0(struct qcom_pcie *pcie)
struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
struct dw_pcie *pci = pcie->pci;
struct device *dev = pci->dev;
+ int ret;
res->vdda = devm_regulator_get(dev, "vdda");
if (IS_ERR(res->vdda))
return PTR_ERR(res->vdda);
- res->iface = devm_clk_get(dev, "iface");
- if (IS_ERR(res->iface))
- return PTR_ERR(res->iface);
-
- res->aux = devm_clk_get(dev, "aux");
- if (IS_ERR(res->aux))
- return PTR_ERR(res->aux);
-
- res->master_bus = devm_clk_get(dev, "master_bus");
- if (IS_ERR(res->master_bus))
- return PTR_ERR(res->master_bus);
+ res->clks[0].id = "iface";
+ res->clks[1].id = "aux";
+ res->clks[2].id = "master_bus";
+ res->clks[3].id = "slave_bus";
- res->slave_bus = devm_clk_get(dev, "slave_bus");
- if (IS_ERR(res->slave_bus))
- return PTR_ERR(res->slave_bus);
+ ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
+ if (ret < 0)
+ return ret;
res->core = devm_reset_control_get_exclusive(dev, "core");
return PTR_ERR_OR_ZERO(res->core);
@@ -469,10 +461,7 @@ static void qcom_pcie_deinit_1_0_0(struct qcom_pcie *pcie)
struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
reset_control_assert(res->core);
- clk_disable_unprepare(res->slave_bus);
- clk_disable_unprepare(res->master_bus);
- clk_disable_unprepare(res->iface);
- clk_disable_unprepare(res->aux);
+ clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
regulator_disable(res->vdda);
}
@@ -489,46 +478,23 @@ static int qcom_pcie_init_1_0_0(struct qcom_pcie *pcie)
return ret;
}
- ret = clk_prepare_enable(res->aux);
- if (ret) {
- dev_err(dev, "cannot prepare/enable aux clock\n");
- goto err_res;
- }
-
- ret = clk_prepare_enable(res->iface);
- if (ret) {
- dev_err(dev, "cannot prepare/enable iface clock\n");
- goto err_aux;
- }
-
- ret = clk_prepare_enable(res->master_bus);
- if (ret) {
- dev_err(dev, "cannot prepare/enable master_bus clock\n");
- goto err_iface;
- }
-
- ret = clk_prepare_enable(res->slave_bus);
+ ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
if (ret) {
- dev_err(dev, "cannot prepare/enable slave_bus clock\n");
- goto err_master;
+ dev_err(dev, "cannot prepare/enable clocks\n");
+ goto err_assert_reset;
}
ret = regulator_enable(res->vdda);
if (ret) {
dev_err(dev, "cannot enable vdda regulator\n");
- goto err_slave;
+ goto err_disable_clks;
}
return 0;
-err_slave:
- clk_disable_unprepare(res->slave_bus);
-err_master:
- clk_disable_unprepare(res->master_bus);
-err_iface:
- clk_disable_unprepare(res->iface);
-err_aux:
- clk_disable_unprepare(res->aux);
-err_res:
+
+err_disable_clks:
+ clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
+err_assert_reset:
reset_control_assert(res->core);
return ret;
--
2.25.1
All the clocks are enabled and disabled at the same time. So the bulk clock
APIs can be used to handle them together. This simplifies the code a lot.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 72 ++++++--------------------
1 file changed, 15 insertions(+), 57 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 0bb27d3c95a0..939973733a1e 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -162,12 +162,10 @@ struct qcom_pcie_resources_2_1_0 {
struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
};
-#define QCOM_PCIE_2_3_2_MAX_SUPPLY 2
+#define QCOM_PCIE_2_3_2_MAX_CLOCKS 4
+#define QCOM_PCIE_2_3_2_MAX_SUPPLY 2
struct qcom_pcie_resources_2_3_2 {
- struct clk *aux_clk;
- struct clk *master_clk;
- struct clk *slave_clk;
- struct clk *cfg_clk;
+ struct clk_bulk_data clks[QCOM_PCIE_2_3_2_MAX_CLOCKS];
struct regulator_bulk_data supplies[QCOM_PCIE_2_3_2_MAX_SUPPLY];
};
@@ -539,21 +537,14 @@ static int qcom_pcie_get_resources_2_3_2(struct qcom_pcie *pcie)
if (ret)
return ret;
- res->aux_clk = devm_clk_get(dev, "aux");
- if (IS_ERR(res->aux_clk))
- return PTR_ERR(res->aux_clk);
-
- res->cfg_clk = devm_clk_get(dev, "cfg");
- if (IS_ERR(res->cfg_clk))
- return PTR_ERR(res->cfg_clk);
-
- res->master_clk = devm_clk_get(dev, "bus_master");
- if (IS_ERR(res->master_clk))
- return PTR_ERR(res->master_clk);
+ res->clks[0].id = "aux";
+ res->clks[1].id = "cfg";
+ res->clks[2].id = "bus_master";
+ res->clks[3].id = "bus_slave";
- res->slave_clk = devm_clk_get(dev, "bus_slave");
- if (IS_ERR(res->slave_clk))
- return PTR_ERR(res->slave_clk);
+ ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
+ if (ret < 0)
+ return ret;
return 0;
}
@@ -562,11 +553,7 @@ static void qcom_pcie_deinit_2_3_2(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
- clk_disable_unprepare(res->slave_clk);
- clk_disable_unprepare(res->master_clk);
- clk_disable_unprepare(res->cfg_clk);
- clk_disable_unprepare(res->aux_clk);
-
+ clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
}
@@ -583,43 +570,14 @@ static int qcom_pcie_init_2_3_2(struct qcom_pcie *pcie)
return ret;
}
- ret = clk_prepare_enable(res->aux_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable aux clock\n");
- goto err_aux_clk;
- }
-
- ret = clk_prepare_enable(res->cfg_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable cfg clock\n");
- goto err_cfg_clk;
- }
-
- ret = clk_prepare_enable(res->master_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable master clock\n");
- goto err_master_clk;
- }
-
- ret = clk_prepare_enable(res->slave_clk);
+ ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
if (ret) {
- dev_err(dev, "cannot prepare/enable slave clock\n");
- goto err_slave_clk;
+ dev_err(dev, "cannot prepare/enable clocks\n");
+ regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
+ return ret;
}
return 0;
-
-err_slave_clk:
- clk_disable_unprepare(res->master_clk);
-err_master_clk:
- clk_disable_unprepare(res->cfg_clk);
-err_cfg_clk:
- clk_disable_unprepare(res->aux_clk);
-
-err_aux_clk:
- regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
-
- return ret;
}
static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie)
--
2.25.1
All the clocks are enabled and disabled at the same time. So the bulk clock
APIs can be used to handle them together. This simplifies the code a lot.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 88 ++++++--------------------
1 file changed, 20 insertions(+), 68 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 939973733a1e..6b83e3627336 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -169,6 +169,12 @@ struct qcom_pcie_resources_2_3_2 {
struct regulator_bulk_data supplies[QCOM_PCIE_2_3_2_MAX_SUPPLY];
};
+#define QCOM_PCIE_2_3_3_MAX_CLOCKS 5
+struct qcom_pcie_resources_2_3_3 {
+ struct clk_bulk_data clks[QCOM_PCIE_2_3_3_MAX_CLOCKS];
+ struct reset_control *rst[7];
+};
+
#define QCOM_PCIE_2_4_0_MAX_CLOCKS 4
struct qcom_pcie_resources_2_4_0 {
struct clk_bulk_data clks[QCOM_PCIE_2_4_0_MAX_CLOCKS];
@@ -187,15 +193,6 @@ struct qcom_pcie_resources_2_4_0 {
struct reset_control *phy_ahb_reset;
};
-struct qcom_pcie_resources_2_3_3 {
- struct clk *iface;
- struct clk *axi_m_clk;
- struct clk *axi_s_clk;
- struct clk *ahb_clk;
- struct clk *aux_clk;
- struct reset_control *rst[7];
-};
-
/* 6 clocks typically, 7 for sm8250 */
struct qcom_pcie_resources_2_7_0 {
struct clk_bulk_data clks[12];
@@ -896,26 +893,17 @@ static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie)
const char *rst_names[] = { "axi_m", "axi_s", "pipe",
"axi_m_sticky", "sticky",
"ahb", "sleep", };
+ int ret;
- res->iface = devm_clk_get(dev, "iface");
- if (IS_ERR(res->iface))
- return PTR_ERR(res->iface);
-
- res->axi_m_clk = devm_clk_get(dev, "axi_m");
- if (IS_ERR(res->axi_m_clk))
- return PTR_ERR(res->axi_m_clk);
-
- res->axi_s_clk = devm_clk_get(dev, "axi_s");
- if (IS_ERR(res->axi_s_clk))
- return PTR_ERR(res->axi_s_clk);
-
- res->ahb_clk = devm_clk_get(dev, "ahb");
- if (IS_ERR(res->ahb_clk))
- return PTR_ERR(res->ahb_clk);
+ res->clks[0].id = "iface";
+ res->clks[1].id = "axi_m";
+ res->clks[2].id = "axi_s";
+ res->clks[3].id = "ahb";
+ res->clks[4].id = "aux";
- res->aux_clk = devm_clk_get(dev, "aux");
- if (IS_ERR(res->aux_clk))
- return PTR_ERR(res->aux_clk);
+ ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
+ if (ret < 0)
+ return ret;
for (i = 0; i < ARRAY_SIZE(rst_names); i++) {
res->rst[i] = devm_reset_control_get(dev, rst_names[i]);
@@ -930,11 +918,7 @@ static void qcom_pcie_deinit_2_3_3(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
- clk_disable_unprepare(res->iface);
- clk_disable_unprepare(res->axi_m_clk);
- clk_disable_unprepare(res->axi_s_clk);
- clk_disable_unprepare(res->ahb_clk);
- clk_disable_unprepare(res->aux_clk);
+ clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
}
static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
@@ -969,47 +953,15 @@ static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
*/
usleep_range(2000, 2500);
- ret = clk_prepare_enable(res->iface);
- if (ret) {
- dev_err(dev, "cannot prepare/enable core clock\n");
- goto err_clk_iface;
- }
-
- ret = clk_prepare_enable(res->axi_m_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable core clock\n");
- goto err_clk_axi_m;
- }
-
- ret = clk_prepare_enable(res->axi_s_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable axi slave clock\n");
- goto err_clk_axi_s;
- }
-
- ret = clk_prepare_enable(res->ahb_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable ahb clock\n");
- goto err_clk_ahb;
- }
-
- ret = clk_prepare_enable(res->aux_clk);
+ ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
if (ret) {
- dev_err(dev, "cannot prepare/enable aux clock\n");
- goto err_clk_aux;
+ dev_err(dev, "cannot prepare/enable clocks\n");
+ goto err_assert_resets;
}
return 0;
-err_clk_aux:
- clk_disable_unprepare(res->ahb_clk);
-err_clk_ahb:
- clk_disable_unprepare(res->axi_s_clk);
-err_clk_axi_s:
- clk_disable_unprepare(res->axi_m_clk);
-err_clk_axi_m:
- clk_disable_unprepare(res->iface);
-err_clk_iface:
+err_assert_resets:
/*
* Not checking for failure, will anyway return
* the original failure in 'ret'.
--
2.25.1
All the resets are asserted and deasserted at the same time. So the bulk
reset APIs can be used to handle them together. This simplifies the code
a lot.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 49 ++++++++++++--------------
1 file changed, 23 insertions(+), 26 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 6b83e3627336..8c39fc554a89 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -170,9 +170,10 @@ struct qcom_pcie_resources_2_3_2 {
};
#define QCOM_PCIE_2_3_3_MAX_CLOCKS 5
+#define QCOM_PCIE_2_3_3_MAX_RESETS 7
struct qcom_pcie_resources_2_3_3 {
struct clk_bulk_data clks[QCOM_PCIE_2_3_3_MAX_CLOCKS];
- struct reset_control *rst[7];
+ struct reset_control_bulk_data rst[QCOM_PCIE_2_3_3_MAX_RESETS];
};
#define QCOM_PCIE_2_4_0_MAX_CLOCKS 4
@@ -889,10 +890,6 @@ static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie)
struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
struct dw_pcie *pci = pcie->pci;
struct device *dev = pci->dev;
- int i;
- const char *rst_names[] = { "axi_m", "axi_s", "pipe",
- "axi_m_sticky", "sticky",
- "ahb", "sleep", };
int ret;
res->clks[0].id = "iface";
@@ -905,11 +902,17 @@ static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie)
if (ret < 0)
return ret;
- for (i = 0; i < ARRAY_SIZE(rst_names); i++) {
- res->rst[i] = devm_reset_control_get(dev, rst_names[i]);
- if (IS_ERR(res->rst[i]))
- return PTR_ERR(res->rst[i]);
- }
+ res->rst[0].id = "axi_m";
+ res->rst[1].id = "axi_s";
+ res->rst[2].id = "pipe";
+ res->rst[3].id = "axi_m_sticky";
+ res->rst[4].id = "sticky";
+ res->rst[5].id = "ahb";
+ res->rst[6].id = "sleep";
+
+ ret = devm_reset_control_bulk_get_exclusive(dev, ARRAY_SIZE(res->rst), res->rst);
+ if (ret < 0)
+ return ret;
return 0;
}
@@ -926,25 +929,20 @@ static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
struct dw_pcie *pci = pcie->pci;
struct device *dev = pci->dev;
- int i, ret;
+ int ret;
- for (i = 0; i < ARRAY_SIZE(res->rst); i++) {
- ret = reset_control_assert(res->rst[i]);
- if (ret) {
- dev_err(dev, "reset #%d assert failed (%d)\n", i, ret);
- return ret;
- }
+ ret = reset_control_bulk_assert(ARRAY_SIZE(res->rst), res->rst);
+ if (ret < 0) {
+ dev_err(dev, "cannot assert resets\n");
+ return ret;
}
usleep_range(2000, 2500);
- for (i = 0; i < ARRAY_SIZE(res->rst); i++) {
- ret = reset_control_deassert(res->rst[i]);
- if (ret) {
- dev_err(dev, "reset #%d deassert failed (%d)\n", i,
- ret);
- return ret;
- }
+ ret = reset_control_bulk_deassert(ARRAY_SIZE(res->rst), res->rst);
+ if (ret < 0) {
+ dev_err(dev, "cannot deassert resets\n");
+ return ret;
}
/*
@@ -966,8 +964,7 @@ static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
* Not checking for failure, will anyway return
* the original failure in 'ret'.
*/
- for (i = 0; i < ARRAY_SIZE(res->rst); i++)
- reset_control_assert(res->rst[i]);
+ reset_control_bulk_assert(ARRAY_SIZE(res->rst), res->rst);
return ret;
}
--
2.25.1
All the resets are asserted and deasserted at the same time. So the bulk
reset APIs can be used to handle them together. This simplifies the code
a lot.
It should be noted that there were delays in-between the reset asserts and
deasserts. But going by the config used by other revisions, those delays
are not really necessary. So a single delay after all asserts and one after
deasserts is used.
The total number of resets supported is 12 but only ipq4019 is using all of
them.
Tested-by: Sricharan Ramabadhran <[email protected]>
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 238 ++++---------------------
1 file changed, 30 insertions(+), 208 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 8c39fc554a89..ed43e03b972f 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -176,22 +176,13 @@ struct qcom_pcie_resources_2_3_3 {
struct reset_control_bulk_data rst[QCOM_PCIE_2_3_3_MAX_RESETS];
};
-#define QCOM_PCIE_2_4_0_MAX_CLOCKS 4
+#define QCOM_PCIE_2_4_0_MAX_CLOCKS 4
+#define QCOM_PCIE_2_4_0_MAX_RESETS 12
struct qcom_pcie_resources_2_4_0 {
struct clk_bulk_data clks[QCOM_PCIE_2_4_0_MAX_CLOCKS];
int num_clks;
- struct reset_control *axi_m_reset;
- struct reset_control *axi_s_reset;
- struct reset_control *pipe_reset;
- struct reset_control *axi_m_vmid_reset;
- struct reset_control *axi_s_xpu_reset;
- struct reset_control *parf_reset;
- struct reset_control *phy_reset;
- struct reset_control *axi_m_sticky_reset;
- struct reset_control *pipe_sticky_reset;
- struct reset_control *pwr_reset;
- struct reset_control *ahb_reset;
- struct reset_control *phy_ahb_reset;
+ struct reset_control_bulk_data resets[QCOM_PCIE_2_4_0_MAX_RESETS];
+ int num_resets;
};
/* 6 clocks typically, 7 for sm8250 */
@@ -626,65 +617,24 @@ static int qcom_pcie_get_resources_2_4_0(struct qcom_pcie *pcie)
if (ret < 0)
return ret;
- res->axi_m_reset = devm_reset_control_get_exclusive(dev, "axi_m");
- if (IS_ERR(res->axi_m_reset))
- return PTR_ERR(res->axi_m_reset);
-
- res->axi_s_reset = devm_reset_control_get_exclusive(dev, "axi_s");
- if (IS_ERR(res->axi_s_reset))
- return PTR_ERR(res->axi_s_reset);
-
- if (is_ipq) {
- /*
- * These resources relates to the PHY or are secure clocks, but
- * are controlled here for IPQ4019
- */
- res->pipe_reset = devm_reset_control_get_exclusive(dev, "pipe");
- if (IS_ERR(res->pipe_reset))
- return PTR_ERR(res->pipe_reset);
-
- res->axi_m_vmid_reset = devm_reset_control_get_exclusive(dev,
- "axi_m_vmid");
- if (IS_ERR(res->axi_m_vmid_reset))
- return PTR_ERR(res->axi_m_vmid_reset);
-
- res->axi_s_xpu_reset = devm_reset_control_get_exclusive(dev,
- "axi_s_xpu");
- if (IS_ERR(res->axi_s_xpu_reset))
- return PTR_ERR(res->axi_s_xpu_reset);
-
- res->parf_reset = devm_reset_control_get_exclusive(dev, "parf");
- if (IS_ERR(res->parf_reset))
- return PTR_ERR(res->parf_reset);
-
- res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
- if (IS_ERR(res->phy_reset))
- return PTR_ERR(res->phy_reset);
- }
-
- res->axi_m_sticky_reset = devm_reset_control_get_exclusive(dev,
- "axi_m_sticky");
- if (IS_ERR(res->axi_m_sticky_reset))
- return PTR_ERR(res->axi_m_sticky_reset);
-
- res->pipe_sticky_reset = devm_reset_control_get_exclusive(dev,
- "pipe_sticky");
- if (IS_ERR(res->pipe_sticky_reset))
- return PTR_ERR(res->pipe_sticky_reset);
-
- res->pwr_reset = devm_reset_control_get_exclusive(dev, "pwr");
- if (IS_ERR(res->pwr_reset))
- return PTR_ERR(res->pwr_reset);
-
- res->ahb_reset = devm_reset_control_get_exclusive(dev, "ahb");
- if (IS_ERR(res->ahb_reset))
- return PTR_ERR(res->ahb_reset);
+ res->resets[0].id = "axi_m";
+ res->resets[1].id = "axi_s";
+ res->resets[2].id = "axi_m_sticky";
+ res->resets[3].id = "pipe_sticky";
+ res->resets[4].id = "pwr";
+ res->resets[5].id = "ahb";
+ res->resets[6].id = "pipe";
+ res->resets[7].id = "axi_m_vmid";
+ res->resets[8].id = "axi_s_xpu";
+ res->resets[9].id = "parf";
+ res->resets[10].id = "phy";
+ res->resets[11].id = "phy_ahb";
+
+ res->num_resets = is_ipq ? 12 : 6;
- if (is_ipq) {
- res->phy_ahb_reset = devm_reset_control_get_exclusive(dev, "phy_ahb");
- if (IS_ERR(res->phy_ahb_reset))
- return PTR_ERR(res->phy_ahb_reset);
- }
+ ret = devm_reset_control_bulk_get_exclusive(dev, res->num_resets, res->resets);
+ if (ret < 0)
+ return ret;
return 0;
}
@@ -693,15 +643,7 @@ static void qcom_pcie_deinit_2_4_0(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
- reset_control_assert(res->axi_m_reset);
- reset_control_assert(res->axi_s_reset);
- reset_control_assert(res->pipe_reset);
- reset_control_assert(res->pipe_sticky_reset);
- reset_control_assert(res->phy_reset);
- reset_control_assert(res->phy_ahb_reset);
- reset_control_assert(res->axi_m_sticky_reset);
- reset_control_assert(res->pwr_reset);
- reset_control_assert(res->ahb_reset);
+ reset_control_bulk_assert(res->num_resets, res->resets);
clk_bulk_disable_unprepare(res->num_clks, res->clks);
}
@@ -712,149 +654,29 @@ static int qcom_pcie_init_2_4_0(struct qcom_pcie *pcie)
struct device *dev = pci->dev;
int ret;
- ret = reset_control_assert(res->axi_m_reset);
- if (ret) {
- dev_err(dev, "cannot assert axi master reset\n");
- return ret;
- }
-
- ret = reset_control_assert(res->axi_s_reset);
- if (ret) {
- dev_err(dev, "cannot assert axi slave reset\n");
- return ret;
- }
-
- usleep_range(10000, 12000);
-
- ret = reset_control_assert(res->pipe_reset);
- if (ret) {
- dev_err(dev, "cannot assert pipe reset\n");
- return ret;
- }
-
- ret = reset_control_assert(res->pipe_sticky_reset);
- if (ret) {
- dev_err(dev, "cannot assert pipe sticky reset\n");
- return ret;
- }
-
- ret = reset_control_assert(res->phy_reset);
- if (ret) {
- dev_err(dev, "cannot assert phy reset\n");
- return ret;
- }
-
- ret = reset_control_assert(res->phy_ahb_reset);
- if (ret) {
- dev_err(dev, "cannot assert phy ahb reset\n");
+ ret = reset_control_bulk_assert(res->num_resets, res->resets);
+ if (ret < 0) {
+ dev_err(dev, "cannot assert resets\n");
return ret;
}
usleep_range(10000, 12000);
- ret = reset_control_assert(res->axi_m_sticky_reset);
- if (ret) {
- dev_err(dev, "cannot assert axi master sticky reset\n");
- return ret;
- }
-
- ret = reset_control_assert(res->pwr_reset);
- if (ret) {
- dev_err(dev, "cannot assert power reset\n");
- return ret;
- }
-
- ret = reset_control_assert(res->ahb_reset);
- if (ret) {
- dev_err(dev, "cannot assert ahb reset\n");
+ ret = reset_control_bulk_deassert(res->num_resets, res->resets);
+ if (ret < 0) {
+ dev_err(dev, "cannot deassert resets\n");
return ret;
}
usleep_range(10000, 12000);
- ret = reset_control_deassert(res->phy_ahb_reset);
+ ret = clk_bulk_prepare_enable(res->num_clks, res->clks);
if (ret) {
- dev_err(dev, "cannot deassert phy ahb reset\n");
+ reset_control_bulk_assert(res->num_resets, res->resets);
return ret;
}
- ret = reset_control_deassert(res->phy_reset);
- if (ret) {
- dev_err(dev, "cannot deassert phy reset\n");
- goto err_rst_phy;
- }
-
- ret = reset_control_deassert(res->pipe_reset);
- if (ret) {
- dev_err(dev, "cannot deassert pipe reset\n");
- goto err_rst_pipe;
- }
-
- ret = reset_control_deassert(res->pipe_sticky_reset);
- if (ret) {
- dev_err(dev, "cannot deassert pipe sticky reset\n");
- goto err_rst_pipe_sticky;
- }
-
- usleep_range(10000, 12000);
-
- ret = reset_control_deassert(res->axi_m_reset);
- if (ret) {
- dev_err(dev, "cannot deassert axi master reset\n");
- goto err_rst_axi_m;
- }
-
- ret = reset_control_deassert(res->axi_m_sticky_reset);
- if (ret) {
- dev_err(dev, "cannot deassert axi master sticky reset\n");
- goto err_rst_axi_m_sticky;
- }
-
- ret = reset_control_deassert(res->axi_s_reset);
- if (ret) {
- dev_err(dev, "cannot deassert axi slave reset\n");
- goto err_rst_axi_s;
- }
-
- ret = reset_control_deassert(res->pwr_reset);
- if (ret) {
- dev_err(dev, "cannot deassert power reset\n");
- goto err_rst_pwr;
- }
-
- ret = reset_control_deassert(res->ahb_reset);
- if (ret) {
- dev_err(dev, "cannot deassert ahb reset\n");
- goto err_rst_ahb;
- }
-
- usleep_range(10000, 12000);
-
- ret = clk_bulk_prepare_enable(res->num_clks, res->clks);
- if (ret)
- goto err_clks;
-
return 0;
-
-err_clks:
- reset_control_assert(res->ahb_reset);
-err_rst_ahb:
- reset_control_assert(res->pwr_reset);
-err_rst_pwr:
- reset_control_assert(res->axi_s_reset);
-err_rst_axi_s:
- reset_control_assert(res->axi_m_sticky_reset);
-err_rst_axi_m_sticky:
- reset_control_assert(res->axi_m_reset);
-err_rst_axi_m:
- reset_control_assert(res->pipe_sticky_reset);
-err_rst_pipe_sticky:
- reset_control_assert(res->pipe_reset);
-err_rst_pipe:
- reset_control_assert(res->phy_reset);
-err_rst_phy:
- reset_control_assert(res->phy_ahb_reset);
- return ret;
}
static int qcom_pcie_post_init_2_4_0(struct qcom_pcie *pcie)
--
2.25.1
To keep uniformity, let's use macros to define the total number of clocks
and supplies in qcom_pcie_resources_{2_7_0/2_9_0} structs.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index ed43e03b972f..e1180c84f0fa 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -185,16 +185,18 @@ struct qcom_pcie_resources_2_4_0 {
int num_resets;
};
-/* 6 clocks typically, 7 for sm8250 */
+#define QCOM_PCIE_2_7_0_MAX_CLOCKS 12
+#define QCOM_PCIE_2_7_0_MAX_SUPPLIES 2
struct qcom_pcie_resources_2_7_0 {
- struct clk_bulk_data clks[12];
+ struct clk_bulk_data clks[QCOM_PCIE_2_7_0_MAX_CLOCKS];
int num_clks;
- struct regulator_bulk_data supplies[2];
+ struct regulator_bulk_data supplies[QCOM_PCIE_2_7_0_MAX_SUPPLIES];
struct reset_control *pci_reset;
};
+#define QCOM_PCIE_2_9_0_MAX_CLOCKS 5
struct qcom_pcie_resources_2_9_0 {
- struct clk_bulk_data clks[5];
+ struct clk_bulk_data clks[QCOM_PCIE_2_9_0_MAX_CLOCKS];
struct reset_control *rst;
};
--
2.25.1
qcom_pcie_config_sid_sm8250() function no longer applies only to SM8250.
So let's rename it to reflect the actual IP version and also move its
definition to keep it sorted as per IP revisions.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 144 ++++++++++++-------------
1 file changed, 72 insertions(+), 72 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index e1180c84f0fa..52f09ee8dd48 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -963,6 +963,77 @@ static void qcom_pcie_deinit_2_7_0(struct qcom_pcie *pcie)
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
}
+static int qcom_pcie_config_sid_1_9_0(struct qcom_pcie *pcie)
+{
+ /* iommu map structure */
+ struct {
+ u32 bdf;
+ u32 phandle;
+ u32 smmu_sid;
+ u32 smmu_sid_len;
+ } *map;
+ void __iomem *bdf_to_sid_base = pcie->parf + PARF_BDF_TO_SID_TABLE_N;
+ struct device *dev = pcie->pci->dev;
+ u8 qcom_pcie_crc8_table[CRC8_TABLE_SIZE];
+ int i, nr_map, size = 0;
+ u32 smmu_sid_base;
+
+ of_get_property(dev->of_node, "iommu-map", &size);
+ if (!size)
+ return 0;
+
+ map = kzalloc(size, GFP_KERNEL);
+ if (!map)
+ return -ENOMEM;
+
+ of_property_read_u32_array(dev->of_node,
+ "iommu-map", (u32 *)map, size / sizeof(u32));
+
+ nr_map = size / (sizeof(*map));
+
+ crc8_populate_msb(qcom_pcie_crc8_table, QCOM_PCIE_CRC8_POLYNOMIAL);
+
+ /* Registers need to be zero out first */
+ memset_io(bdf_to_sid_base, 0, CRC8_TABLE_SIZE * sizeof(u32));
+
+ /* Extract the SMMU SID base from the first entry of iommu-map */
+ smmu_sid_base = map[0].smmu_sid;
+
+ /* Look for an available entry to hold the mapping */
+ for (i = 0; i < nr_map; i++) {
+ __be16 bdf_be = cpu_to_be16(map[i].bdf);
+ u32 val;
+ u8 hash;
+
+ hash = crc8(qcom_pcie_crc8_table, (u8 *)&bdf_be, sizeof(bdf_be),
+ 0);
+
+ val = readl(bdf_to_sid_base + hash * sizeof(u32));
+
+ /* If the register is already populated, look for next available entry */
+ while (val) {
+ u8 current_hash = hash++;
+ u8 next_mask = 0xff;
+
+ /* If NEXT field is NULL then update it with next hash */
+ if (!(val & next_mask)) {
+ val |= (u32)hash;
+ writel(val, bdf_to_sid_base + current_hash * sizeof(u32));
+ }
+
+ val = readl(bdf_to_sid_base + hash * sizeof(u32));
+ }
+
+ /* BDF [31:16] | SID [15:8] | NEXT [7:0] */
+ val = map[i].bdf << 16 | (map[i].smmu_sid - smmu_sid_base) << 8 | 0;
+ writel(val, bdf_to_sid_base + hash * sizeof(u32));
+ }
+
+ kfree(map);
+
+ return 0;
+}
+
static int qcom_pcie_get_resources_2_9_0(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0;
@@ -1077,77 +1148,6 @@ static int qcom_pcie_link_up(struct dw_pcie *pci)
return !!(val & PCI_EXP_LNKSTA_DLLLA);
}
-static int qcom_pcie_config_sid_sm8250(struct qcom_pcie *pcie)
-{
- /* iommu map structure */
- struct {
- u32 bdf;
- u32 phandle;
- u32 smmu_sid;
- u32 smmu_sid_len;
- } *map;
- void __iomem *bdf_to_sid_base = pcie->parf + PARF_BDF_TO_SID_TABLE_N;
- struct device *dev = pcie->pci->dev;
- u8 qcom_pcie_crc8_table[CRC8_TABLE_SIZE];
- int i, nr_map, size = 0;
- u32 smmu_sid_base;
-
- of_get_property(dev->of_node, "iommu-map", &size);
- if (!size)
- return 0;
-
- map = kzalloc(size, GFP_KERNEL);
- if (!map)
- return -ENOMEM;
-
- of_property_read_u32_array(dev->of_node,
- "iommu-map", (u32 *)map, size / sizeof(u32));
-
- nr_map = size / (sizeof(*map));
-
- crc8_populate_msb(qcom_pcie_crc8_table, QCOM_PCIE_CRC8_POLYNOMIAL);
-
- /* Registers need to be zero out first */
- memset_io(bdf_to_sid_base, 0, CRC8_TABLE_SIZE * sizeof(u32));
-
- /* Extract the SMMU SID base from the first entry of iommu-map */
- smmu_sid_base = map[0].smmu_sid;
-
- /* Look for an available entry to hold the mapping */
- for (i = 0; i < nr_map; i++) {
- __be16 bdf_be = cpu_to_be16(map[i].bdf);
- u32 val;
- u8 hash;
-
- hash = crc8(qcom_pcie_crc8_table, (u8 *)&bdf_be, sizeof(bdf_be),
- 0);
-
- val = readl(bdf_to_sid_base + hash * sizeof(u32));
-
- /* If the register is already populated, look for next available entry */
- while (val) {
- u8 current_hash = hash++;
- u8 next_mask = 0xff;
-
- /* If NEXT field is NULL then update it with next hash */
- if (!(val & next_mask)) {
- val |= (u32)hash;
- writel(val, bdf_to_sid_base + current_hash * sizeof(u32));
- }
-
- val = readl(bdf_to_sid_base + hash * sizeof(u32));
- }
-
- /* BDF [31:16] | SID [15:8] | NEXT [7:0] */
- val = map[i].bdf << 16 | (map[i].smmu_sid - smmu_sid_base) << 8 | 0;
- writel(val, bdf_to_sid_base + hash * sizeof(u32));
- }
-
- kfree(map);
-
- return 0;
-}
-
static int qcom_pcie_host_init(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
@@ -1268,7 +1268,7 @@ static const struct qcom_pcie_ops ops_1_9_0 = {
.init = qcom_pcie_init_2_7_0,
.deinit = qcom_pcie_deinit_2_7_0,
.ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
- .config_sid = qcom_pcie_config_sid_sm8250,
+ .config_sid = qcom_pcie_config_sid_1_9_0,
};
/* Qcom IP rev.: 2.9.0 Synopsys IP rev.: 5.00a */
--
2.25.1
"mhi" register region contains the MHI registers that could be used by
the PCIe controller drivers to get debug information like PCIe link
transition counts on newer SoCs.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
Documentation/devicetree/bindings/pci/qcom,pcie.yaml | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
index fb32c43dd12d..ecbb0f9efa21 100644
--- a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
@@ -44,11 +44,11 @@ properties:
reg:
minItems: 4
- maxItems: 5
+ maxItems: 6
reg-names:
minItems: 4
- maxItems: 5
+ maxItems: 6
interrupts:
minItems: 1
@@ -185,13 +185,15 @@ allOf:
properties:
reg:
minItems: 4
- maxItems: 4
+ maxItems: 5
reg-names:
+ minItems: 4
items:
- const: parf # Qualcomm specific registers
- const: dbi # DesignWare PCIe registers
- const: elbi # External local bus interface registers
- const: config # PCIe configuration space
+ - const: mhi # MHI registers
- if:
properties:
@@ -209,14 +211,16 @@ allOf:
properties:
reg:
minItems: 5
- maxItems: 5
+ maxItems: 6
reg-names:
+ minItems: 5
items:
- const: parf # Qualcomm specific registers
- const: dbi # DesignWare PCIe registers
- const: elbi # External local bus interface registers
- const: atu # ATU address space
- const: config # PCIe configuration space
+ - const: mhi # MHI registers
- if:
properties:
--
2.25.1
The "mhi" region contains the debug registers that could be used to monitor
the PCIe link transitions.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
arch/arm64/boot/dts/qcom/sdm845.dtsi | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index 479859bd8ab3..46caac9acc95 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -2282,8 +2282,9 @@ pcie0: pci@1c00000 {
reg = <0 0x01c00000 0 0x2000>,
<0 0x60000000 0 0xf1d>,
<0 0x60000f20 0 0xa8>,
- <0 0x60100000 0 0x100000>;
- reg-names = "parf", "dbi", "elbi", "config";
+ <0 0x60100000 0 0x100000>,
+ <0 0x01c07000 0 0x1000>;
+ reg-names = "parf", "dbi", "elbi", "config", "mhi";
device_type = "pci";
linux,pci-domain = <0>;
bus-range = <0x00 0xff>;
@@ -2387,8 +2388,9 @@ pcie1: pci@1c08000 {
reg = <0 0x01c08000 0 0x2000>,
<0 0x40000000 0 0xf1d>,
<0 0x40000f20 0 0xa8>,
- <0 0x40100000 0 0x100000>;
- reg-names = "parf", "dbi", "elbi", "config";
+ <0 0x40100000 0 0x100000>,
+ <0 0x01c0c000 0 0x1000>;
+ reg-names = "parf", "dbi", "elbi", "config", "mhi";
device_type = "pci";
linux,pci-domain = <1>;
bus-range = <0x00 0xff>;
--
2.25.1
The "mhi" region contains the debug registers that could be used to monitor
the PCIe link transitions.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
arch/arm64/boot/dts/qcom/sm8250.dtsi | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/boot/dts/qcom/sm8250.dtsi b/arch/arm64/boot/dts/qcom/sm8250.dtsi
index 2f0e460acccd..81383e20d3d9 100644
--- a/arch/arm64/boot/dts/qcom/sm8250.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8250.dtsi
@@ -1824,8 +1824,9 @@ pcie0: pci@1c00000 {
<0 0x60000000 0 0xf1d>,
<0 0x60000f20 0 0xa8>,
<0 0x60001000 0 0x1000>,
- <0 0x60100000 0 0x100000>;
- reg-names = "parf", "dbi", "elbi", "atu", "config";
+ <0 0x60100000 0 0x100000>,
+ <0 0x01c03000 0 0x1000>;
+ reg-names = "parf", "dbi", "elbi", "atu", "config", "mhi";
device_type = "pci";
linux,pci-domain = <0>;
bus-range = <0x00 0xff>;
@@ -1933,8 +1934,9 @@ pcie1: pci@1c08000 {
<0 0x40000000 0 0xf1d>,
<0 0x40000f20 0 0xa8>,
<0 0x40001000 0 0x1000>,
- <0 0x40100000 0 0x100000>;
- reg-names = "parf", "dbi", "elbi", "atu", "config";
+ <0 0x40100000 0 0x100000>,
+ <0 0x01c0b000 0 0x1000>;
+ reg-names = "parf", "dbi", "elbi", "atu", "config", "mhi";
device_type = "pci";
linux,pci-domain = <1>;
bus-range = <0x00 0xff>;
@@ -2041,8 +2043,9 @@ pcie2: pci@1c10000 {
<0 0x64000000 0 0xf1d>,
<0 0x64000f20 0 0xa8>,
<0 0x64001000 0 0x1000>,
- <0 0x64100000 0 0x100000>;
- reg-names = "parf", "dbi", "elbi", "atu", "config";
+ <0 0x64100000 0 0x100000>,
+ <0 0x01c13000 0 0x1000>;
+ reg-names = "parf", "dbi", "elbi", "atu", "config", "mhi";
device_type = "pci";
linux,pci-domain = <2>;
bus-range = <0x00 0xff>;
--
2.25.1
The "mhi" region contains the debug registers that could be used to monitor
the PCIe link transitions.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 25 +++++++++++++++----------
1 file changed, 15 insertions(+), 10 deletions(-)
diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
index 0d02599d8867..eb87c3e5d2bc 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
@@ -1653,8 +1653,9 @@ pcie4: pcie@1c00000 {
<0x0 0x30000000 0x0 0xf1d>,
<0x0 0x30000f20 0x0 0xa8>,
<0x0 0x30001000 0x0 0x1000>,
- <0x0 0x30100000 0x0 0x100000>;
- reg-names = "parf", "dbi", "elbi", "atu", "config";
+ <0x0 0x30100000 0x0 0x100000>,
+ <0x0 0x01c03000 0x0 0x1000>;
+ reg-names = "parf", "dbi", "elbi", "atu", "config", "mhi";
#address-cells = <3>;
#size-cells = <2>;
ranges = <0x01000000 0x0 0x30200000 0x0 0x30200000 0x0 0x100000>,
@@ -1752,8 +1753,9 @@ pcie3b: pcie@1c08000 {
<0x0 0x32000000 0x0 0xf1d>,
<0x0 0x32000f20 0x0 0xa8>,
<0x0 0x32001000 0x0 0x1000>,
- <0x0 0x32100000 0x0 0x100000>;
- reg-names = "parf", "dbi", "elbi", "atu", "config";
+ <0x0 0x32100000 0x0 0x100000>,
+ <0x0 0x01c0b000 0x0 0x1000>;
+ reg-names = "parf", "dbi", "elbi", "atu", "config", "mhi";
#address-cells = <3>;
#size-cells = <2>;
ranges = <0x01000000 0x0 0x32200000 0x0 0x32200000 0x0 0x100000>,
@@ -1849,8 +1851,9 @@ pcie3a: pcie@1c10000 {
<0x0 0x34000000 0x0 0xf1d>,
<0x0 0x34000f20 0x0 0xa8>,
<0x0 0x34001000 0x0 0x1000>,
- <0x0 0x34100000 0x0 0x100000>;
- reg-names = "parf", "dbi", "elbi", "atu", "config";
+ <0x0 0x34100000 0x0 0x100000>,
+ <0x0 0x01c13000 0x0 0x1000>;
+ reg-names = "parf", "dbi", "elbi", "atu", "config", "mhi";
#address-cells = <3>;
#size-cells = <2>;
ranges = <0x01000000 0x0 0x34200000 0x0 0x34200000 0x0 0x100000>,
@@ -1949,8 +1952,9 @@ pcie2b: pcie@1c18000 {
<0x0 0x38000000 0x0 0xf1d>,
<0x0 0x38000f20 0x0 0xa8>,
<0x0 0x38001000 0x0 0x1000>,
- <0x0 0x38100000 0x0 0x100000>;
- reg-names = "parf", "dbi", "elbi", "atu", "config";
+ <0x0 0x38100000 0x0 0x100000>,
+ <0x0 0x01c1b000 0x0 0x1000>;
+ reg-names = "parf", "dbi", "elbi", "atu", "config", "mhi";
#address-cells = <3>;
#size-cells = <2>;
ranges = <0x01000000 0x0 0x38200000 0x0 0x38200000 0x0 0x100000>,
@@ -2046,8 +2050,9 @@ pcie2a: pcie@1c20000 {
<0x0 0x3c000000 0x0 0xf1d>,
<0x0 0x3c000f20 0x0 0xa8>,
<0x0 0x3c001000 0x0 0x1000>,
- <0x0 0x3c100000 0x0 0x100000>;
- reg-names = "parf", "dbi", "elbi", "atu", "config";
+ <0x0 0x3c100000 0x0 0x100000>,
+ <0x0 0x01c23000 0x0 0x1000>;
+ reg-names = "parf", "dbi", "elbi", "atu", "config", "mhi";
#address-cells = <3>;
#size-cells = <2>;
ranges = <0x01000000 0x0 0x3c200000 0x0 0x3c200000 0x0 0x100000>,
--
2.25.1
Qualcomm PCIe controllers of versions v1.9.0 and v2.7.0 have debug
registers in the MHI region that count PCIe link transitions. Expose them
over debugfs to userspace to help debug the low power issues.
Note that even though the registers are prefixed as PARF_, they don't
live under the "parf" register region. The register naming is following
the Qualcomm's internal documentation as like other registers.
The debugfs interface is added using per config callback because the
register interface for accessing debug info varies between IP versions.
While at it, let's arrange the local variables in probe function to follow
reverse XMAS tree order.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 77 +++++++++++++++++++++++++-
1 file changed, 75 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 52f09ee8dd48..f99b7e7f3f73 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -10,6 +10,7 @@
#include <linux/clk.h>
#include <linux/crc8.h>
+#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/interconnect.h>
@@ -62,6 +63,13 @@
#define AXI_MSTR_RESP_COMP_CTRL1 0x81c
#define MISC_CONTROL_1_REG 0x8bc
+/* MHI registers */
+#define PARF_DEBUG_CNT_PM_LINKST_IN_L2 0xc04
+#define PARF_DEBUG_CNT_PM_LINKST_IN_L1 0xc0c
+#define PARF_DEBUG_CNT_PM_LINKST_IN_L0S 0xc10
+#define PARF_DEBUG_CNT_AUX_CLK_IN_L1SUB_L1 0xc84
+#define PARF_DEBUG_CNT_AUX_CLK_IN_L1SUB_L2 0xc88
+
/* PARF_SYS_CTRL register fields */
#define MAC_PHY_POWERDOWN_IN_P2_D_MUX_EN BIT(29)
#define MST_WAKEUP_EN BIT(13)
@@ -219,6 +227,7 @@ struct qcom_pcie_ops {
void (*deinit)(struct qcom_pcie *pcie);
void (*ltssm_enable)(struct qcom_pcie *pcie);
int (*config_sid)(struct qcom_pcie *pcie);
+ void (*init_debugfs)(struct qcom_pcie *pcie);
};
struct qcom_pcie_cfg {
@@ -229,11 +238,13 @@ struct qcom_pcie {
struct dw_pcie *pci;
void __iomem *parf; /* DT parf */
void __iomem *elbi; /* DT elbi */
+ void __iomem *mhi;
union qcom_pcie_resources res;
struct phy *phy;
struct gpio_desc *reset;
struct icc_path *icc_mem;
const struct qcom_pcie_cfg *cfg;
+ struct dentry *debugfs;
};
#define to_qcom_pcie(x) dev_get_drvdata((x)->dev)
@@ -263,6 +274,23 @@ static int qcom_pcie_start_link(struct dw_pcie *pci)
return 0;
}
+static void qcom_pcie_init_debugfs(struct qcom_pcie *pcie,
+ int (*debugfs_func)(struct seq_file *s, void *data))
+{
+ struct dw_pcie *pci = pcie->pci;
+ struct device *dev = pci->dev;
+ char *name;
+
+ name = devm_kasprintf(dev, GFP_KERNEL, "%pOFP", dev->of_node);
+ if (!name)
+ return;
+
+ pcie->debugfs = debugfs_create_dir(name, NULL);
+
+ debugfs_create_devm_seqfile(pci->dev, "link_transition_count",
+ pcie->debugfs, debugfs_func);
+}
+
static void qcom_pcie_2_1_0_ltssm_enable(struct qcom_pcie *pcie)
{
u32 val;
@@ -963,6 +991,35 @@ static void qcom_pcie_deinit_2_7_0(struct qcom_pcie *pcie)
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
}
+static int qcom_pcie_debugfs_func_2_7_0(struct seq_file *s, void *data)
+{
+ struct qcom_pcie *pcie = (struct qcom_pcie *) dev_get_drvdata(s->private);
+
+ seq_printf(s, "L0s transition count: %u\n",
+ readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_PM_LINKST_IN_L0S));
+
+ seq_printf(s, "L1 transition count: %u\n",
+ readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_PM_LINKST_IN_L1));
+
+ seq_printf(s, "L1.1 transition count: %u\n",
+ readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_AUX_CLK_IN_L1SUB_L1));
+
+ seq_printf(s, "L1.2 transition count: %u\n",
+ readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_AUX_CLK_IN_L1SUB_L2));
+
+ seq_printf(s, "L2 transition count: %u\n",
+ readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_PM_LINKST_IN_L2));
+
+ return 0;
+}
+
+
+static void qcom_pcie_init_debugfs_2_7_0(struct qcom_pcie *pcie)
+{
+ if (pcie->mhi)
+ qcom_pcie_init_debugfs(pcie, qcom_pcie_debugfs_func_2_7_0);
+}
+
static int qcom_pcie_config_sid_1_9_0(struct qcom_pcie *pcie)
{
/* iommu map structure */
@@ -1260,6 +1317,7 @@ static const struct qcom_pcie_ops ops_2_7_0 = {
.init = qcom_pcie_init_2_7_0,
.deinit = qcom_pcie_deinit_2_7_0,
.ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
+ .init_debugfs = qcom_pcie_init_debugfs_2_7_0,
};
/* Qcom IP rev.: 1.9.0 */
@@ -1269,6 +1327,7 @@ static const struct qcom_pcie_ops ops_1_9_0 = {
.deinit = qcom_pcie_deinit_2_7_0,
.ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
.config_sid = qcom_pcie_config_sid_1_9_0,
+ .init_debugfs = qcom_pcie_init_debugfs_2_7_0,
};
/* Qcom IP rev.: 2.9.0 Synopsys IP rev.: 5.00a */
@@ -1387,11 +1446,12 @@ static void qcom_pcie_icc_update(struct qcom_pcie *pcie)
static int qcom_pcie_probe(struct platform_device *pdev)
{
+ const struct qcom_pcie_cfg *pcie_cfg;
struct device *dev = &pdev->dev;
+ struct qcom_pcie *pcie;
struct dw_pcie_rp *pp;
+ struct resource *res;
struct dw_pcie *pci;
- struct qcom_pcie *pcie;
- const struct qcom_pcie_cfg *pcie_cfg;
int ret;
pcie_cfg = of_device_get_match_data(dev);
@@ -1439,6 +1499,16 @@ static int qcom_pcie_probe(struct platform_device *pdev)
goto err_pm_runtime_put;
}
+ /* MHI region is optional */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mhi");
+ if (res) {
+ pcie->mhi = devm_ioremap_resource(dev, res);
+ if (IS_ERR(pcie->mhi)) {
+ ret = PTR_ERR(pcie->mhi);
+ goto err_pm_runtime_put;
+ }
+ }
+
pcie->phy = devm_phy_optional_get(dev, "pciephy");
if (IS_ERR(pcie->phy)) {
ret = PTR_ERR(pcie->phy);
@@ -1469,6 +1539,9 @@ static int qcom_pcie_probe(struct platform_device *pdev)
qcom_pcie_icc_update(pcie);
+ if (pcie->cfg->ops->init_debugfs)
+ pcie->cfg->ops->init_debugfs(pcie);
+
return 0;
err_phy_exit:
--
2.25.1
Qualcomm PCIe controllers of version v2.4.0 have debug registers in the
PARF region that count PCIe link transitions. Expose them over debugfs to
userspace to help debug the low power issues.
Signed-off-by: Manivannan Sadhasivam <[email protected]>
---
drivers/pci/controller/dwc/pcie-qcom.c | 33 ++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index f99b7e7f3f73..0b41f007fa90 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -37,6 +37,7 @@
/* PARF registers */
#define PARF_SYS_CTRL 0x00
#define PARF_PM_CTRL 0x20
+#define PARF_PM_STTS 0x24
#define PARF_PCS_DEEMPH 0x34
#define PARF_PCS_SWING 0x38
#define PARF_PHY_CTRL 0x40
@@ -84,6 +85,12 @@
/* PARF_PM_CTRL register fields */
#define REQ_NOT_ENTR_L1 BIT(5)
+/* PARF_PM_STTS register fields */
+#define PM_LINKST_IN_L1SUB BIT(8)
+#define PM_LINKST_IN_L0S BIT(7)
+#define PM_LINKST_IN_L2 BIT(5)
+#define PM_LINKST_IN_L1 BIT(4)
+
/* PARF_PCS_DEEMPH register fields */
#define PCS_DEEMPH_TX_DEEMPH_GEN1(x) FIELD_PREP(GENMASK(21, 16), x)
#define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) FIELD_PREP(GENMASK(13, 8), x)
@@ -737,6 +744,31 @@ static int qcom_pcie_post_init_2_4_0(struct qcom_pcie *pcie)
return 0;
}
+static int qcom_pcie_debugfs_func_2_4_0(struct seq_file *s, void *data)
+{
+ struct qcom_pcie *pcie = (struct qcom_pcie *) dev_get_drvdata(s->private);
+
+ seq_printf(s, "L0s transition count: %u\n",
+ readl_relaxed(pcie->parf + PM_LINKST_IN_L0S));
+
+ seq_printf(s, "L1 transition count: %u\n",
+ readl_relaxed(pcie->parf + PM_LINKST_IN_L1));
+
+ seq_printf(s, "L1.1 transition count: %u\n",
+ readl_relaxed(pcie->parf + PM_LINKST_IN_L1SUB));
+
+ seq_printf(s, "L2 transition count: %u\n",
+ readl_relaxed(pcie->parf + PM_LINKST_IN_L2));
+
+ return 0;
+}
+
+
+static void qcom_pcie_init_debugfs_2_4_0(struct qcom_pcie *pcie)
+{
+ qcom_pcie_init_debugfs(pcie, qcom_pcie_debugfs_func_2_4_0);
+}
+
static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
@@ -1300,6 +1332,7 @@ static const struct qcom_pcie_ops ops_2_4_0 = {
.post_init = qcom_pcie_post_init_2_4_0,
.deinit = qcom_pcie_deinit_2_4_0,
.ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
+ .init_debugfs = qcom_pcie_init_debugfs_2_4_0,
};
/* Qcom IP rev.: 2.3.3 Synopsys IP rev.: 4.30a */
--
2.25.1
On 10/03/2023 05:08, Manivannan Sadhasivam wrote:
> "mhi" register region contains the MHI registers that could be used by
> the PCIe controller drivers to get debug information like PCIe link
> transition counts on newer SoCs.
>
> Signed-off-by: Manivannan Sadhasivam <[email protected]>
> ---
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Best regards,
Krzysztof
On 3/14/2023 4:06 PM, Sricharan Ramabadhran wrote:
>
>
> On 3/10/2023 9:38 AM, Manivannan Sadhasivam wrote:
>> Qualcomm PCIe controllers of version v2.4.0 have debug registers in the
>> PARF region that count PCIe link transitions. Expose them over debugfs to
>> userspace to help debug the low power issues.
>>
>> Signed-off-by: Manivannan Sadhasivam <[email protected]>
>> ---
>> drivers/pci/controller/dwc/pcie-qcom.c | 33 ++++++++++++++++++++++++++
>> 1 file changed, 33 insertions(+)
>>
>> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c
>> b/drivers/pci/controller/dwc/pcie-qcom.c
>> index f99b7e7f3f73..0b41f007fa90 100644
>> --- a/drivers/pci/controller/dwc/pcie-qcom.c
>> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
>> @@ -37,6 +37,7 @@
>> /* PARF registers */
>> #define PARF_SYS_CTRL 0x00
>> #define PARF_PM_CTRL 0x20
>> +#define PARF_PM_STTS 0x24
>> #define PARF_PCS_DEEMPH 0x34
>> #define PARF_PCS_SWING 0x38
>> #define PARF_PHY_CTRL 0x40
>> @@ -84,6 +85,12 @@
>> /* PARF_PM_CTRL register fields */
>> #define REQ_NOT_ENTR_L1 BIT(5)
>> +/* PARF_PM_STTS register fields */
>> +#define PM_LINKST_IN_L1SUB BIT(8)
>> +#define PM_LINKST_IN_L0S BIT(7)
>> +#define PM_LINKST_IN_L2 BIT(5)
>> +#define PM_LINKST_IN_L1 BIT(4)
>> +
>> /* PARF_PCS_DEEMPH register fields */
>> #define PCS_DEEMPH_TX_DEEMPH_GEN1(x) FIELD_PREP(GENMASK(21,
>> 16), x)
>> #define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) FIELD_PREP(GENMASK(13,
>> 8), x)
>> @@ -737,6 +744,31 @@ static int qcom_pcie_post_init_2_4_0(struct
>> qcom_pcie *pcie)
>> return 0;
>> }
>> +static int qcom_pcie_debugfs_func_2_4_0(struct seq_file *s, void *data)
>> +{
>> + struct qcom_pcie *pcie = (struct qcom_pcie *)
>> dev_get_drvdata(s->private);
>> +
>> + seq_printf(s, "L0s transition count: %u\n",
>> + readl_relaxed(pcie->parf + PM_LINKST_IN_L0S));
>> +
>> + seq_printf(s, "L1 transition count: %u\n",
>> + readl_relaxed(pcie->parf + PM_LINKST_IN_L1));
>> +
>> + seq_printf(s, "L1.1 transition count: %u\n",
>> + readl_relaxed(pcie->parf + PM_LINKST_IN_L1SUB));
>> +
>> + seq_printf(s, "L2 transition count: %u\n",
>> + readl_relaxed(pcie->parf + PM_LINKST_IN_L2));
>> +
>
> Using bitmask as register offset ? instead use PM_STTS and bitmask it ?
Also, since its 1 bit, all are status and not count.
Not sure, if you want it to limit this debug based on 'mhi' property
being populated ?
Regards,
Sricharan
On Tue, Mar 14, 2023 at 04:25:29PM +0530, Sricharan Ramabadhran wrote:
>
>
> On 3/14/2023 4:06 PM, Sricharan Ramabadhran wrote:
> >
> >
> > On 3/10/2023 9:38 AM, Manivannan Sadhasivam wrote:
> > > Qualcomm PCIe controllers of version v2.4.0 have debug registers in the
> > > PARF region that count PCIe link transitions. Expose them over debugfs to
> > > userspace to help debug the low power issues.
> > >
> > > Signed-off-by: Manivannan Sadhasivam <[email protected]>
> > > ---
> > > drivers/pci/controller/dwc/pcie-qcom.c | 33 ++++++++++++++++++++++++++
> > > 1 file changed, 33 insertions(+)
> > >
> > > diff --git a/drivers/pci/controller/dwc/pcie-qcom.c
> > > b/drivers/pci/controller/dwc/pcie-qcom.c
> > > index f99b7e7f3f73..0b41f007fa90 100644
> > > --- a/drivers/pci/controller/dwc/pcie-qcom.c
> > > +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> > > @@ -37,6 +37,7 @@
> > > /* PARF registers */
> > > #define PARF_SYS_CTRL 0x00
> > > #define PARF_PM_CTRL 0x20
> > > +#define PARF_PM_STTS 0x24
> > > #define PARF_PCS_DEEMPH 0x34
> > > #define PARF_PCS_SWING 0x38
> > > #define PARF_PHY_CTRL 0x40
> > > @@ -84,6 +85,12 @@
> > > /* PARF_PM_CTRL register fields */
> > > #define REQ_NOT_ENTR_L1 BIT(5)
> > > +/* PARF_PM_STTS register fields */
> > > +#define PM_LINKST_IN_L1SUB BIT(8)
> > > +#define PM_LINKST_IN_L0S BIT(7)
> > > +#define PM_LINKST_IN_L2 BIT(5)
> > > +#define PM_LINKST_IN_L1 BIT(4)
> > > +
> > > /* PARF_PCS_DEEMPH register fields */
> > > #define PCS_DEEMPH_TX_DEEMPH_GEN1(x) FIELD_PREP(GENMASK(21,
> > > 16), x)
> > > #define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x)
> > > FIELD_PREP(GENMASK(13, 8), x)
> > > @@ -737,6 +744,31 @@ static int qcom_pcie_post_init_2_4_0(struct
> > > qcom_pcie *pcie)
> > > return 0;
> > > }
> > > +static int qcom_pcie_debugfs_func_2_4_0(struct seq_file *s, void *data)
> > > +{
> > > + struct qcom_pcie *pcie = (struct qcom_pcie *)
> > > dev_get_drvdata(s->private);
> > > +
> > > + seq_printf(s, "L0s transition count: %u\n",
> > > + readl_relaxed(pcie->parf + PM_LINKST_IN_L0S));
> > > +
> > > + seq_printf(s, "L1 transition count: %u\n",
> > > + readl_relaxed(pcie->parf + PM_LINKST_IN_L1));
> > > +
> > > + seq_printf(s, "L1.1 transition count: %u\n",
> > > + readl_relaxed(pcie->parf + PM_LINKST_IN_L1SUB));
> > > +
> > > + seq_printf(s, "L2 transition count: %u\n",
> > > + readl_relaxed(pcie->parf + PM_LINKST_IN_L2));
> > > +
> >
> > Using bitmask as register offset ? instead use PM_STTS and bitmask it ?
>
> Also, since its 1 bit, all are status and not count.
> Not sure, if you want it to limit this debug based on 'mhi' property
> being populated ?
>
Err... Look like I blindly copied the debugfs function from 2.7.0 :/ Sry, since
these are all just 1 bit, we cannot use it for getting the count. So I'll drop
this patch in next revision.
Thanks,
Mani
> Regards,
> Sricharan
--
மணிவண்ணன் சதாசிவம்
On 3/10/2023 9:38 AM, Manivannan Sadhasivam wrote:
> Qualcomm PCIe controllers of version v2.4.0 have debug registers in the
> PARF region that count PCIe link transitions. Expose them over debugfs to
> userspace to help debug the low power issues.
>
> Signed-off-by: Manivannan Sadhasivam <[email protected]>
> ---
> drivers/pci/controller/dwc/pcie-qcom.c | 33 ++++++++++++++++++++++++++
> 1 file changed, 33 insertions(+)
>
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index f99b7e7f3f73..0b41f007fa90 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -37,6 +37,7 @@
> /* PARF registers */
> #define PARF_SYS_CTRL 0x00
> #define PARF_PM_CTRL 0x20
> +#define PARF_PM_STTS 0x24
> #define PARF_PCS_DEEMPH 0x34
> #define PARF_PCS_SWING 0x38
> #define PARF_PHY_CTRL 0x40
> @@ -84,6 +85,12 @@
> /* PARF_PM_CTRL register fields */
> #define REQ_NOT_ENTR_L1 BIT(5)
>
> +/* PARF_PM_STTS register fields */
> +#define PM_LINKST_IN_L1SUB BIT(8)
> +#define PM_LINKST_IN_L0S BIT(7)
> +#define PM_LINKST_IN_L2 BIT(5)
> +#define PM_LINKST_IN_L1 BIT(4)
> +
> /* PARF_PCS_DEEMPH register fields */
> #define PCS_DEEMPH_TX_DEEMPH_GEN1(x) FIELD_PREP(GENMASK(21, 16), x)
> #define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) FIELD_PREP(GENMASK(13, 8), x)
> @@ -737,6 +744,31 @@ static int qcom_pcie_post_init_2_4_0(struct qcom_pcie *pcie)
> return 0;
> }
>
> +static int qcom_pcie_debugfs_func_2_4_0(struct seq_file *s, void *data)
> +{
> + struct qcom_pcie *pcie = (struct qcom_pcie *) dev_get_drvdata(s->private);
> +
> + seq_printf(s, "L0s transition count: %u\n",
> + readl_relaxed(pcie->parf + PM_LINKST_IN_L0S));
> +
> + seq_printf(s, "L1 transition count: %u\n",
> + readl_relaxed(pcie->parf + PM_LINKST_IN_L1));
> +
> + seq_printf(s, "L1.1 transition count: %u\n",
> + readl_relaxed(pcie->parf + PM_LINKST_IN_L1SUB));
> +
> + seq_printf(s, "L2 transition count: %u\n",
> + readl_relaxed(pcie->parf + PM_LINKST_IN_L2));
> +
Using bitmask as register offset ? instead use PM_STTS and bitmask it ?
Regards,
Sricharan