Commit f876904e authored by Kishon Vijay Abraham I's avatar Kishon Vijay Abraham I Committed by Bjorn Helgaas
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PCI: cadence: Add support to build pcie-cadence library as a kernel module 



Currently, the Cadence PCIe controller driver can be built as a built-in
module only. Since PCIe functionality is not a necessity for booting, add
support to build the Cadence PCIe driver as a loadable module as well.

Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: default avatarSiddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://patch.msgid.link/20250417124408.2752248-2-s-vadapalli@ti.com
parent 16b2da85

drivers/pci/controller/cadence/Kconfig

+3 −3
Original line number Diff line number Diff line
@@ -4,16 +4,16 @@ menu "Cadence-based PCIe controllers" 
	depends on PCI



config PCIE_CADENCE

	bool

	tristate



config PCIE_CADENCE_HOST

	bool

	tristate

	depends on OF

	select IRQ_DOMAIN

	select PCIE_CADENCE



config PCIE_CADENCE_EP

	bool

	tristate

	depends on OF

	depends on PCI_ENDPOINT

	select PCIE_CADENCE

drivers/pci/controller/cadence/pcie-cadence-ep.c

+6 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 
#include <linux/bitfield.h>

#include <linux/delay.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/pci-epc.h>

#include <linux/platform_device.h>
@@ -752,3 +753,8 @@ int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep) 


	return ret;

}

EXPORT_SYMBOL_GPL(cdns_pcie_ep_setup);



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("Cadence PCIe endpoint controller driver");

MODULE_AUTHOR("Cyrille Pitchen <cyrille.pitchen@free-electrons.com>");

drivers/pci/controller/cadence/pcie-cadence-host.c

+9 −0
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 


#include <linux/delay.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/list_sort.h>

#include <linux/of_address.h>

#include <linux/of_pci.h>
@@ -72,6 +73,7 @@ void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn, 


	return rc->cfg_base + (where & 0xfff);

}

EXPORT_SYMBOL_GPL(cdns_pci_map_bus);



static struct pci_ops cdns_pcie_host_ops = {

	.map_bus	= cdns_pci_map_bus,
@@ -495,6 +497,7 @@ int cdns_pcie_host_init(struct cdns_pcie_rc *rc) 


	return cdns_pcie_host_init_address_translation(rc);

}

EXPORT_SYMBOL_GPL(cdns_pcie_host_init);



int cdns_pcie_host_link_setup(struct cdns_pcie_rc *rc)

{
@@ -519,6 +522,7 @@ int cdns_pcie_host_link_setup(struct cdns_pcie_rc *rc) 


	return 0;

}

EXPORT_SYMBOL_GPL(cdns_pcie_host_link_setup);



int cdns_pcie_host_setup(struct cdns_pcie_rc *rc)

{
@@ -572,3 +576,8 @@ int cdns_pcie_host_setup(struct cdns_pcie_rc *rc) 


	return pci_host_probe(bridge);

}

EXPORT_SYMBOL_GPL(cdns_pcie_host_setup);



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("Cadence PCIe host controller driver");

MODULE_AUTHOR("Cyrille Pitchen <cyrille.pitchen@free-electrons.com>");

drivers/pci/controller/cadence/pcie-cadence.c

+12 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
// Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>



#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of.h>



#include "pcie-cadence.h"
@@ -23,6 +24,7 @@ void cdns_pcie_detect_quiet_min_delay_set(struct cdns_pcie *pcie) 


	cdns_pcie_writel(pcie, CDNS_PCIE_LTSSM_CONTROL_CAP, ltssm_control_cap);

}

EXPORT_SYMBOL_GPL(cdns_pcie_detect_quiet_min_delay_set);



void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 busnr, u8 fn,

				   u32 r, bool is_io,
@@ -100,6 +102,7 @@ void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 busnr, u8 fn, 
	cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR0(r), addr0);

	cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(r), addr1);

}

EXPORT_SYMBOL_GPL(cdns_pcie_set_outbound_region);



void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie,

						  u8 busnr, u8 fn,
@@ -134,6 +137,7 @@ void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie, 
	cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR0(r), addr0);

	cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(r), addr1);

}

EXPORT_SYMBOL_GPL(cdns_pcie_set_outbound_region_for_normal_msg);



void cdns_pcie_reset_outbound_region(struct cdns_pcie *pcie, u32 r)

{
@@ -146,6 +150,7 @@ void cdns_pcie_reset_outbound_region(struct cdns_pcie *pcie, u32 r) 
	cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR0(r), 0);

	cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(r), 0);

}

EXPORT_SYMBOL_GPL(cdns_pcie_reset_outbound_region);



void cdns_pcie_disable_phy(struct cdns_pcie *pcie)

{
@@ -156,6 +161,7 @@ void cdns_pcie_disable_phy(struct cdns_pcie *pcie) 
		phy_exit(pcie->phy[i]);

	}

}

EXPORT_SYMBOL_GPL(cdns_pcie_disable_phy);



int cdns_pcie_enable_phy(struct cdns_pcie *pcie)

{
@@ -184,6 +190,7 @@ int cdns_pcie_enable_phy(struct cdns_pcie *pcie) 


	return ret;

}

EXPORT_SYMBOL_GPL(cdns_pcie_enable_phy);



int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie)

{
@@ -243,6 +250,7 @@ int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie) 


	return ret;

}

EXPORT_SYMBOL_GPL(cdns_pcie_init_phy);



static int cdns_pcie_suspend_noirq(struct device *dev)

{
@@ -271,3 +279,7 @@ const struct dev_pm_ops cdns_pcie_pm_ops = { 
	NOIRQ_SYSTEM_SLEEP_PM_OPS(cdns_pcie_suspend_noirq,

				  cdns_pcie_resume_noirq)

};



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("Cadence PCIe controller driver");

MODULE_AUTHOR("Cyrille Pitchen <cyrille.pitchen@free-electrons.com>");

drivers/pci/controller/cadence/pcie-cadence.h

+2 −2
Original line number Diff line number Diff line
@@ -508,7 +508,7 @@ static inline bool cdns_pcie_link_up(struct cdns_pcie *pcie) 
	return true;

}



#ifdef CONFIG_PCIE_CADENCE_HOST

#if IS_ENABLED(CONFIG_PCIE_CADENCE_HOST)

int cdns_pcie_host_link_setup(struct cdns_pcie_rc *rc);

int cdns_pcie_host_init(struct cdns_pcie_rc *rc);

int cdns_pcie_host_setup(struct cdns_pcie_rc *rc);
@@ -537,7 +537,7 @@ static inline void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int d 
}

#endif



#ifdef CONFIG_PCIE_CADENCE_EP

#if IS_ENABLED(CONFIG_PCIE_CADENCE_EP)

int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep);

#else

static inline int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep)