Commit 2dbfa1e3 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Make SH7786 PCIe port reset logic more aggressive. 



This attempts a more complete port reset, building on top of the existing
approach.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 9ec16516

arch/sh/drivers/pci/pcie-sh7786.c

+11 −1
Original line number Diff line number Diff line
@@ -204,6 +204,16 @@ static int phy_init(struct pci_channel *chan) 
	return -ETIMEDOUT;

}



static void pcie_reset(struct sh7786_pcie_port *port)

{

	struct pci_channel *chan = port->hose;



	pci_write_reg(chan, 1, SH4A_PCIESRSTR);

	pci_write_reg(chan, 0, SH4A_PCIETCTLR);

	pci_write_reg(chan, 0, SH4A_PCIESRSTR);

	pci_write_reg(chan, 0, SH4A_PCIETXVC0SR);

}



static int pcie_init(struct sh7786_pcie_port *port)

{

	struct pci_channel *chan = port->hose;
@@ -213,7 +223,7 @@ static int pcie_init(struct sh7786_pcie_port *port) 
	int ret, i;



	/* Begin initialization */

	pci_write_reg(chan, 0, SH4A_PCIETCTLR);

	pcie_reset(port);



	/* Initialize as type1. */

	data = pci_read_reg(chan, SH4A_PCIEPCICONF3);