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PCI: mediatek-gen3: Add mtk_gen3_pcie_pdata data structure

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Introduce mtk_gen3_pcie_pdata data structure in order to define
multiple callbacks for each supported SoC.

This is a preliminary patch to introduce EN7581 PCIe support.

Link: https://lore.kernel.org/linux-pci/c193d1a87505d045e2e0ef33317bce17012ee095.1720022580.git.lorenzo@kernel.org
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Tested-by: Zhengping Zhang <zhengping.zhang@airoha.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Jianjun Wang <jianjun.wang@mediatek.com>
This commit is contained in:
Lorenzo Bianconi 2024-07-03 18:12:42 +02:00 committed by Krzysztof Wilczyński
parent c6abd0eade
commit dc869a40d7
No known key found for this signature in database
GPG Key ID: 7C64768D3DE334E7
1 changed files with 21 additions and 3 deletions
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24
drivers/pci/controller/pcie-mediatek-gen3.c
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@ -100,6 +100,16 @@
#define PCIE_ATR_TLP_TYPE_MEM PCIE_ATR_TLP_TYPE(0)
#define PCIE_ATR_TLP_TYPE_IO PCIE_ATR_TLP_TYPE(2)
struct mtk_gen3_pcie;
/**
* struct mtk_gen3_pcie_pdata - differentiate between host generations
* @power_up: pcie power_up callback
*/
struct mtk_gen3_pcie_pdata {
int (*power_up)(struct mtk_gen3_pcie *pcie);
};
/**
* struct mtk_msi_set - MSI information for each set
* @base: IO mapped register base
@ -131,6 +141,7 @@ struct mtk_msi_set {
* @msi_sets: MSI sets information
* @lock: lock protecting IRQ bit map
* @msi_irq_in_use: bit map for assigned MSI IRQ
* @soc: pointer to SoC-dependent operations
*/
struct mtk_gen3_pcie {
struct device *dev;
@ -151,6 +162,8 @@ struct mtk_gen3_pcie {
struct mtk_msi_set msi_sets[PCIE_MSI_SET_NUM];
struct mutex lock;
DECLARE_BITMAP(msi_irq_in_use, PCIE_MSI_IRQS_NUM);
const struct mtk_gen3_pcie_pdata *soc;
};
/* LTSSM state in PCIE_LTSSM_STATUS_REG bit[28:24] */
@ -904,7 +917,7 @@ static int mtk_pcie_setup(struct mtk_gen3_pcie *pcie)
usleep_range(10, 20);
/* Don't touch the hardware registers before power up */
err = mtk_pcie_power_up(pcie);
err = pcie->soc->power_up(pcie);
if (err)
return err;
@ -939,6 +952,7 @@ static int mtk_pcie_probe(struct platform_device *pdev)
pcie = pci_host_bridge_priv(host);
pcie->dev = dev;
pcie->soc = device_get_match_data(dev);
platform_set_drvdata(pdev, pcie);
err = mtk_pcie_setup(pcie);
@ -1054,7 +1068,7 @@ static int mtk_pcie_resume_noirq(struct device *dev)
struct mtk_gen3_pcie *pcie = dev_get_drvdata(dev);
int err;
err = mtk_pcie_power_up(pcie);
err = pcie->soc->power_up(pcie);
if (err)
return err;
@ -1074,8 +1088,12 @@ static const struct dev_pm_ops mtk_pcie_pm_ops = {
mtk_pcie_resume_noirq)
};
static const struct mtk_gen3_pcie_pdata mtk_pcie_soc_mt8192 = {
.power_up = mtk_pcie_power_up,
};
static const struct of_device_id mtk_pcie_of_match[] = {
{ .compatible = "mediatek,mt8192-pcie" },
{ .compatible = "mediatek,mt8192-pcie", .data = &mtk_pcie_soc_mt8192 },
{},
};
MODULE_DEVICE_TABLE(of, mtk_pcie_of_match);