[PATCH v8 07/16] PCI: imx6: Simplify configure_type() by using mode_off and mode_mask
From: Frank Li
Date: Mon Jan 08 2024 - 18:24:43 EST
Add drvdata::mode_off and drvdata::mode_mask to simplify
imx6_pcie_configure_type() logic.
Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
Notes:
Change from v7 to v8
- replace simple with simplify
- remove reduntant comments about FILED_PREP
Change from v3 to v7
- none
Change from v2 to v3
- none
Change from v1 to v2
- use ffs() to fixe build error.
Change from v2 to v3
- none
Change from v1 to v2
- use ffs() to fixe build error.
drivers/pci/controller/dwc/pci-imx6.c | 59 ++++++++++++++++++---------
1 file changed, 39 insertions(+), 20 deletions(-)
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 818e73157e724..fd83af238fa60 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -68,6 +68,7 @@ enum imx6_pcie_variants {
#define IMX6_PCIE_MAX_CLKS 6
+#define IMX6_PCIE_MAX_INSTANCES 2
struct imx6_pcie_drvdata {
enum imx6_pcie_variants variant;
enum dw_pcie_device_mode mode;
@@ -78,6 +79,8 @@ struct imx6_pcie_drvdata {
const u32 clks_cnt;
const u32 ltssm_off;
const u32 ltssm_mask;
+ const u32 mode_off[IMX6_PCIE_MAX_INSTANCES];
+ const u32 mode_mask[IMX6_PCIE_MAX_INSTANCES];
};
struct imx6_pcie {
@@ -174,32 +177,24 @@ static unsigned int imx6_pcie_grp_offset(const struct imx6_pcie *imx6_pcie)
static void imx6_pcie_configure_type(struct imx6_pcie *imx6_pcie)
{
- unsigned int mask, val, mode;
+ const struct imx6_pcie_drvdata *drvdata = imx6_pcie->drvdata;
+ unsigned int mask, val, mode, id;
- if (imx6_pcie->drvdata->mode == DW_PCIE_EP_TYPE)
+ if (drvdata->mode == DW_PCIE_EP_TYPE)
mode = PCI_EXP_TYPE_ENDPOINT;
else
mode = PCI_EXP_TYPE_ROOT_PORT;
- switch (imx6_pcie->drvdata->variant) {
- case IMX8MQ:
- case IMX8MQ_EP:
- if (imx6_pcie->controller_id == 1) {
- mask = IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE;
- val = FIELD_PREP(IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE,
- mode);
- } else {
- mask = IMX6Q_GPR12_DEVICE_TYPE;
- val = FIELD_PREP(IMX6Q_GPR12_DEVICE_TYPE, mode);
- }
- break;
- default:
- mask = IMX6Q_GPR12_DEVICE_TYPE;
- val = FIELD_PREP(IMX6Q_GPR12_DEVICE_TYPE, mode);
- break;
- }
+ id = imx6_pcie->controller_id;
+
+ /* If mode_mask[id] is zero, means each controller have its individual gpr */
+ if (!drvdata->mode_mask[id])
+ id = 0;
+
+ mask = drvdata->mode_mask[id];
+ val = mode << (ffs(mask) - 1);
- regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, mask, val);
+ regmap_update_bits(imx6_pcie->iomuxc_gpr, drvdata->mode_off[id], mask, val);
}
static int pcie_phy_poll_ack(struct imx6_pcie *imx6_pcie, bool exp_val)
@@ -1389,6 +1384,8 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.clks_cnt = ARRAY_SIZE(imx6_3clks_bus_pcie_phy),
.ltssm_off = IOMUXC_GPR12,
.ltssm_mask = IMX6Q_GPR12_PCIE_CTL_2,
+ .mode_off[0] = IOMUXC_GPR12,
+ .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
},
[IMX6SX] = {
.variant = IMX6SX,
@@ -1400,6 +1397,8 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.clks_cnt = ARRAY_SIZE(imx6_4clks_bus_pcie_phy_axi),
.ltssm_off = IOMUXC_GPR12,
.ltssm_mask = IMX6Q_GPR12_PCIE_CTL_2,
+ .mode_off[0] = IOMUXC_GPR12,
+ .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
},
[IMX6QP] = {
.variant = IMX6QP,
@@ -1412,6 +1411,8 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.clks_cnt = ARRAY_SIZE(imx6_3clks_bus_pcie_phy),
.ltssm_off = IOMUXC_GPR12,
.ltssm_mask = IMX6Q_GPR12_PCIE_CTL_2,
+ .mode_off[0] = IOMUXC_GPR12,
+ .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
},
[IMX7D] = {
.variant = IMX7D,
@@ -1421,6 +1422,8 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.gpr = "fsl,imx7d-iomuxc-gpr",
.clk_names = imx6_3clks_bus_pcie_phy,
.clks_cnt = ARRAY_SIZE(imx6_3clks_bus_pcie_phy),
+ .mode_off[0] = IOMUXC_GPR12,
+ .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
},
[IMX8MQ] = {
.variant = IMX8MQ,
@@ -1429,6 +1432,10 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.gpr = "fsl,imx8mq-iomuxc-gpr",
.clk_names = imx6_4clks_bus_pcie_phy_aux,
.clks_cnt = ARRAY_SIZE(imx6_4clks_bus_pcie_phy_aux),
+ .mode_off[0] = IOMUXC_GPR12,
+ .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+ .mode_off[1] = IOMUXC_GPR12,
+ .mode_mask[1] = IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE,
},
[IMX8MM] = {
.variant = IMX8MM,
@@ -1438,6 +1445,8 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.gpr = "fsl,imx8mm-iomuxc-gpr",
.clk_names = imx6_3clks_bus_pcie_aux,
.clks_cnt = ARRAY_SIZE(imx6_3clks_bus_pcie_aux),
+ .mode_off[0] = IOMUXC_GPR12,
+ .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
},
[IMX8MP] = {
.variant = IMX8MP,
@@ -1447,6 +1456,8 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.gpr = "fsl,imx8mp-iomuxc-gpr",
.clk_names = imx6_3clks_bus_pcie_aux,
.clks_cnt = ARRAY_SIZE(imx6_3clks_bus_pcie_aux),
+ .mode_off[0] = IOMUXC_GPR12,
+ .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
},
[IMX8MQ_EP] = {
.variant = IMX8MQ_EP,
@@ -1456,6 +1467,10 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.gpr = "fsl,imx8mq-iomuxc-gpr",
.clk_names = imx6_4clks_bus_pcie_phy_aux,
.clks_cnt = ARRAY_SIZE(imx6_4clks_bus_pcie_phy_aux),
+ .mode_off[0] = IOMUXC_GPR12,
+ .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+ .mode_off[1] = IOMUXC_GPR12,
+ .mode_mask[1] = IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE,
},
[IMX8MM_EP] = {
.variant = IMX8MM_EP,
@@ -1464,6 +1479,8 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.gpr = "fsl,imx8mm-iomuxc-gpr",
.clk_names = imx6_3clks_bus_pcie_aux,
.clks_cnt = ARRAY_SIZE(imx6_3clks_bus_pcie_aux),
+ .mode_off[0] = IOMUXC_GPR12,
+ .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
},
[IMX8MP_EP] = {
.variant = IMX8MP_EP,
@@ -1472,6 +1489,8 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.gpr = "fsl,imx8mp-iomuxc-gpr",
.clk_names = imx6_3clks_bus_pcie_aux,
.clks_cnt = ARRAY_SIZE(imx6_3clks_bus_pcie_aux),
+ .mode_off[0] = IOMUXC_GPR12,
+ .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
},
};
--
2.34.1