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bcma: add early_init function for PCIe core and move some fix into it

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There are some PCIe core fixes that need to be applied before accessing
SPROM, otherwise reading it may fail.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Rafał Miłecki 2015-01-25 11:11:14 +01:00 committed by Kalle Valo
parent ae8ce289e5
commit b504075f59
3 changed files with 53 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

66
drivers/bcma/driver_pci.c
View File

@ -144,6 +144,47 @@ static u16 bcma_pcie_mdio_writeread(struct bcma_drv_pci *pc, u16 device,
return bcma_pcie_mdio_read(pc, device, address);
}
/**************************************************
* Early init.
**************************************************/
static void bcma_core_pci_fixcfg(struct bcma_drv_pci *pc)
{
struct bcma_device *core = pc->core;
u16 val16, core_index;
uint regoff;
regoff = BCMA_CORE_PCI_SPROM(BCMA_CORE_PCI_SPROM_PI_OFFSET);
core_index = (u16)core->core_index;
val16 = pcicore_read16(pc, regoff);
if (((val16 & BCMA_CORE_PCI_SPROM_PI_MASK) >> BCMA_CORE_PCI_SPROM_PI_SHIFT)
!= core_index) {
val16 = (core_index << BCMA_CORE_PCI_SPROM_PI_SHIFT) |
(val16 & ~BCMA_CORE_PCI_SPROM_PI_MASK);
pcicore_write16(pc, regoff, val16);
}
}
/*
* Apply some early fixes required before accessing SPROM.
* See also si_pci_fixcfg.
*/
void bcma_core_pci_early_init(struct bcma_drv_pci *pc)
{
if (pc->early_setup_done)
return;
pc->hostmode = bcma_core_pci_is_in_hostmode(pc);
if (pc->hostmode)
goto out;
bcma_core_pci_fixcfg(pc);
out:
pc->early_setup_done = true;
}
/**************************************************
* Workarounds.
**************************************************/
@ -175,24 +216,6 @@ static void bcma_pcicore_serdes_workaround(struct bcma_drv_pci *pc)
tmp & ~BCMA_CORE_PCI_PLL_CTRL_FREQDET_EN);
}
static void bcma_core_pci_fixcfg(struct bcma_drv_pci *pc)
{
struct bcma_device *core = pc->core;
u16 val16, core_index;
uint regoff;
regoff = BCMA_CORE_PCI_SPROM(BCMA_CORE_PCI_SPROM_PI_OFFSET);
core_index = (u16)core->core_index;
val16 = pcicore_read16(pc, regoff);
if (((val16 & BCMA_CORE_PCI_SPROM_PI_MASK) >> BCMA_CORE_PCI_SPROM_PI_SHIFT)
!= core_index) {
val16 = (core_index << BCMA_CORE_PCI_SPROM_PI_SHIFT) |
(val16 & ~BCMA_CORE_PCI_SPROM_PI_MASK);
pcicore_write16(pc, regoff, val16);
}
}
/* Fix MISC config to allow coming out of L2/L3-Ready state w/o PRST */
/* Needs to happen when coming out of 'standby'/'hibernate' */
static void bcma_core_pci_config_fixup(struct bcma_drv_pci *pc)
@ -216,7 +239,6 @@ static void bcma_core_pci_config_fixup(struct bcma_drv_pci *pc)
static void bcma_core_pci_clientmode_init(struct bcma_drv_pci *pc)
{
bcma_core_pci_fixcfg(pc);
bcma_pcicore_serdes_workaround(pc);
bcma_core_pci_config_fixup(pc);
}
@ -226,11 +248,11 @@ void bcma_core_pci_init(struct bcma_drv_pci *pc)
if (pc->setup_done)
return;
pc->hostmode = bcma_core_pci_is_in_hostmode(pc);
bcma_core_pci_early_init(pc);
if (pc->hostmode)
bcma_core_pci_hostmode_init(pc);
if (!pc->hostmode)
else
bcma_core_pci_clientmode_init(pc);
}

7
drivers/bcma/main.c
View File

@ -402,6 +402,13 @@ int bcma_bus_register(struct bcma_bus *bus)
bcma_core_chipcommon_early_init(&bus->drv_cc);
}
/* Early init PCIE core */
core = bcma_find_core(bus, BCMA_CORE_PCIE);
if (core) {
bus->drv_pci[0].core = core;
bcma_core_pci_early_init(&bus->drv_pci[0]);
}
/* Cores providing flash access go before SPROM init */
list_for_each_entry(core, &bus->cores, list) {
if (bcma_is_core_needed_early(core->id.id))

2
include/linux/bcma/bcma_driver_pci.h
View File

@ -223,6 +223,7 @@ struct bcma_drv_pci_host {
struct bcma_drv_pci {
struct bcma_device *core;
u8 early_setup_done:1;
u8 setup_done:1;
u8 hostmode:1;
@ -237,6 +238,7 @@ struct bcma_drv_pci {
#define pcicore_write16(pc, offset, val) bcma_write16((pc)->core, offset, val)
#define pcicore_write32(pc, offset, val) bcma_write32((pc)->core, offset, val)
extern void bcma_core_pci_early_init(struct bcma_drv_pci *pc);
extern void bcma_core_pci_init(struct bcma_drv_pci *pc);
extern int bcma_core_pci_irq_ctl(struct bcma_drv_pci *pc,
struct bcma_device *core, bool enable);