iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sh: Make SH7786 PCIe port reset logic more aggressive.

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

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2010-09-07 16:11:04 +09:00
parent 9ec1651668
commit 2dbfa1e37d
1 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/sh/drivers/pci/pcie-sh7786.c
View File

@ -204,6 +204,16 @@ static int phy_init(struct pci_channel *chan)
return -ETIMEDOUT; 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) static int pcie_init(struct sh7786_pcie_port *port)
{ {
struct pci_channel *chan = port->hose; struct pci_channel *chan = port->hose;
@ -213,7 +223,7 @@ static int pcie_init(struct sh7786_pcie_port *port)
int ret, i; int ret, i;
/* Begin initialization */ /* Begin initialization */
pci_write_reg(chan, 0, SH4A_PCIETCTLR); pcie_reset(port);
/* Initialize as type1. */ /* Initialize as type1. */
data = pci_read_reg(chan, SH4A_PCIEPCICONF3); data = pci_read_reg(chan, SH4A_PCIEPCICONF3);