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PCI: rcar-gen4: Add struct rcar_gen4_pcie_drvdata

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In order to support future SoCs such as r8a779g0 (R-Car V4H) and
r8a779h0 (R-Car V4M) that require different initialization settings,
introduce SoC specific driver data with the initial member being the
device mode.

No functional change.

[kwilczynski: commit log]
Link: https://lore.kernel.org/linux-pci/20240611125057.1232873-3-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
This commit is contained in:
Yoshihiro Shimoda 2024-06-11 21:50:54 +09:00 committed by Krzysztof Wilczyński
parent 544a18c936
commit ac1d89f8dc
No known key found for this signature in database
GPG Key ID: 7C64768D3DE334E7
1 changed files with 23 additions and 9 deletions
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32
drivers/pci/controller/dwc/pcie-rcar-gen4.c
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@ -48,11 +48,15 @@
#define RCAR_GEN4_PCIE_EP_FUNC_DBI_OFFSET 0x1000
#define RCAR_GEN4_PCIE_EP_FUNC_DBI2_OFFSET 0x800
struct rcar_gen4_pcie_drvdata {
enum dw_pcie_device_mode mode;
};
struct rcar_gen4_pcie {
struct dw_pcie dw;
void __iomem *base;
struct platform_device *pdev;
enum dw_pcie_device_mode mode;
const struct rcar_gen4_pcie_drvdata *drvdata;
};
#define to_rcar_gen4_pcie(_dw) container_of(_dw, struct rcar_gen4_pcie, dw)
@ -137,7 +141,7 @@ static int rcar_gen4_pcie_start_link(struct dw_pcie *dw)
* Since dw_pcie_setup_rc() sets it once, PCIe Gen2 will be trained.
* So, this needs remaining times for up to PCIe Gen4 if RC mode.
*/
if (changes && rcar->mode == DW_PCIE_RC_TYPE)
if (changes && rcar->drvdata->mode == DW_PCIE_RC_TYPE)
changes--;
for (i = 0; i < changes; i++) {
@ -172,9 +176,9 @@ static int rcar_gen4_pcie_common_init(struct rcar_gen4_pcie *rcar)
reset_control_assert(dw->core_rsts[DW_PCIE_PWR_RST].rstc);
val = readl(rcar->base + PCIEMSR0);
if (rcar->mode == DW_PCIE_RC_TYPE) {
if (rcar->drvdata->mode == DW_PCIE_RC_TYPE) {
val |= DEVICE_TYPE_RC;
} else if (rcar->mode == DW_PCIE_EP_TYPE) {
} else if (rcar->drvdata->mode == DW_PCIE_EP_TYPE) {
val |= DEVICE_TYPE_EP;
} else {
ret = -EINVAL;
@ -451,9 +455,11 @@ static void rcar_gen4_remove_dw_pcie_ep(struct rcar_gen4_pcie *rcar)
/* Common */
static int rcar_gen4_add_dw_pcie(struct rcar_gen4_pcie *rcar)
{
rcar->mode = (uintptr_t)of_device_get_match_data(&rcar->pdev->dev);
rcar->drvdata = of_device_get_match_data(&rcar->pdev->dev);
if (!rcar->drvdata)
return -EINVAL;
switch (rcar->mode) {
switch (rcar->drvdata->mode) {
case DW_PCIE_RC_TYPE:
return rcar_gen4_add_dw_pcie_rp(rcar);
case DW_PCIE_EP_TYPE:
@ -494,7 +500,7 @@ static int rcar_gen4_pcie_probe(struct platform_device *pdev)
static void rcar_gen4_remove_dw_pcie(struct rcar_gen4_pcie *rcar)
{
switch (rcar->mode) {
switch (rcar->drvdata->mode) {
case DW_PCIE_RC_TYPE:
rcar_gen4_remove_dw_pcie_rp(rcar);
break;
@ -514,14 +520,22 @@ static void rcar_gen4_pcie_remove(struct platform_device *pdev)
rcar_gen4_pcie_unprepare(rcar);
}
static struct rcar_gen4_pcie_drvdata drvdata_rcar_gen4_pcie = {
.mode = DW_PCIE_RC_TYPE,
};
static struct rcar_gen4_pcie_drvdata drvdata_rcar_gen4_pcie_ep = {
.mode = DW_PCIE_EP_TYPE,
};
static const struct of_device_id rcar_gen4_pcie_of_match[] = {
{
.compatible = "renesas,rcar-gen4-pcie",
.data = (void *)DW_PCIE_RC_TYPE,
.data = &drvdata_rcar_gen4_pcie,
},
{
.compatible = "renesas,rcar-gen4-pcie-ep",
.data = (void *)DW_PCIE_EP_TYPE,
.data = &drvdata_rcar_gen4_pcie_ep,
},
{},
};