Unverified Commit dc869a40 authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Krzysztof Wilczyński
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PCI: mediatek-gen3: Add mtk_gen3_pcie_pdata data structure 

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: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: default avatarKrzysztof Wilczyński <kwilczynski@kernel.org>
Tested-by: default avatarZhengping Zhang <zhengping.zhang@airoha.com>
Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: default avatarJianjun Wang <jianjun.wang@mediatek.com>
parent c6abd0ea

drivers/pci/controller/pcie-mediatek-gen3.c

+21 −3
Original line number Diff line number Diff line
@@ -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);