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[cns3xxx]: move PCIe init to subsys init call

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ARM Linux PCI/PCIe hardware intialization needs to occur before device_init
as it does not support hotplug.  I have modeled the cns3xxx PCIe init after
other ARM platforms.  Registering it early resolves resource issues occuring
during bus enumeration that occur when a device driver is linked static in
the kernel.
 
Instead of passing in a bitmask to enable the 2 available ports, link detect
is used to enable ports that have a valid link.
 
Signed-off-by: Tim Harvey <tharvey@gateworks.com>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34044 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
kaloz 2012-10-31 20:16:53 +00:00
parent a7af64893d
commit 2c3fbebc9e
1 changed files with 156 additions and 0 deletions
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156
target/linux/cns3xxx/patches-3.3/480-cns3xxx_pcie_early_init.patch Normal file
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@ -0,0 +1,156 @@
--- a/arch/arm/mach-cns3xxx/cns3420vb.c
+++ b/arch/arm/mach-cns3xxx/cns3420vb.c
@@ -203,7 +203,6 @@ static void __init cns3420_init(void)
NR_IRQS_CNS3XXX);
cns3xxx_gpio_init(32, 32, CNS3XXX_GPIOB_BASE_VIRT, IRQ_CNS3XXX_GPIOB,
NR_IRQS_CNS3XXX + 32);
- cns3xxx_pcie_init(0x3);
pm_power_off = cns3xxx_power_off;
}
@@ -220,11 +219,21 @@ static struct map_desc cns3420_io_desc[]
static void __init cns3420_map_io(void)
{
cns3xxx_common_init();
+ cns3xxx_pcie_iotable_init();
iotable_init(cns3420_io_desc, ARRAY_SIZE(cns3420_io_desc));
cns3420_early_serial_setup();
}
+static int __init cns3420vb_pcie_init(void)
+{
+ if (!machine_is_cns3420vb())
+ return 0;
+
+ return cns3xxx_pcie_init();
+}
+subsys_initcall(cns3420vb_pcie_init);
+
MACHINE_START(CNS3420VB, "Cavium Networks CNS3420 Validation Board")
.atag_offset = 0x100,
.map_io = cns3420_map_io,
--- a/arch/arm/mach-cns3xxx/core.h
+++ b/arch/arm/mach-cns3xxx/core.h
@@ -12,8 +12,8 @@
#define __CNS3XXX_CORE_H
extern struct sys_timer cns3xxx_timer;
-extern int cns3xxx_pcie_init(u8 bitmap);
-extern void cns3xxx_pcie_iotable_init(u8 bitmap);
+extern void cns3xxx_pcie_iotable_init(void);
+
#ifdef CONFIG_CACHE_L2X0
void __init cns3xxx_l2x0_init(void);
@@ -23,6 +23,7 @@ static inline void cns3xxx_l2x0_init(voi
void __init cns3xxx_common_init(void);
void __init cns3xxx_init_irq(void);
+int __init cns3xxx_pcie_init(void);
void cns3xxx_power_off(void);
void cns3xxx_restart(char, const char *);
--- a/arch/arm/mach-cns3xxx/laguna.c
+++ b/arch/arm/mach-cns3xxx/laguna.c
@@ -729,7 +731,7 @@ static struct map_desc laguna_io_desc[]
static void __init laguna_map_io(void)
{
cns3xxx_common_init();
- cns3xxx_pcie_iotable_init(0x3);
+ cns3xxx_pcie_iotable_init();
iotable_init(ARRAY_AND_SIZE(laguna_io_desc));
laguna_early_serial_setup();
}
@@ -753,11 +755,19 @@ static int laguna_register_gpio(struct g
return ret;
}
+static int __init laguna_pcie_init(void)
+{
+ if (!machine_is_gw2388())
+ return 0;
+
+ return cns3xxx_pcie_init();
+}
+subsys_initcall(laguna_pcie_init);
+
static int __init laguna_model_setup(void)
{
u32 __iomem *mem;
u32 reg;
- u8 pcie_bitmap = 0;
printk("Running on Gateworks Laguna %s\n", laguna_info.model);
cns3xxx_gpio_init( 0, 32, CNS3XXX_GPIOA_BASE_VIRT, IRQ_CNS3XXX_GPIOA,
@@ -779,14 +789,6 @@ static int __init laguna_model_setup(voi
(laguna_info.config_bitmap & SATA1_LOAD))
cns3xxx_ahci_init();
- if (laguna_info.config_bitmap & (PCIE0_LOAD))
- pcie_bitmap |= 0x1;
-
- if (laguna_info.config_bitmap & (PCIE1_LOAD))
- pcie_bitmap |= 0x2;
-
- cns3xxx_pcie_init(pcie_bitmap);
-
if (laguna_info.config_bitmap & (USB0_LOAD)) {
cns3xxx_pwr_power_up(1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_PLL_USB);
@@ -926,7 +928,6 @@ static int __init laguna_model_setup(voi
}
return 0;
}
-
late_initcall(laguna_model_setup);
MACHINE_START(GW2388, "Gateworks Corporation Laguna Platform")
--- a/arch/arm/mach-cns3xxx/pcie.c
+++ b/arch/arm/mach-cns3xxx/pcie.c
@@ -456,23 +456,18 @@ static int cns3xxx_pcie_abort_handler(un
return 0;
}
-void __init cns3xxx_pcie_iotable_init(u8 bitmap)
+
+void __init cns3xxx_pcie_iotable_init()
{
- static int _iotable_init = 0;
int i;
- bitmap &= ~_iotable_init;
for (i = 0; i < ARRAY_SIZE(cns3xxx_pcie); i++) {
- if (!(bitmap & (1 << i)))
- continue;
-
iotable_init(cns3xxx_pcie[i].cfg_bases,
ARRAY_SIZE(cns3xxx_pcie[i].cfg_bases));
}
- _iotable_init |= bitmap;
}
-int __init cns3xxx_pcie_init(u8 bitmap)
+int __init cns3xxx_pcie_init(void)
{
int i;
@@ -482,14 +477,12 @@ int __init cns3xxx_pcie_init(u8 bitmap)
hook_fault_code(16 + 6, cns3xxx_pcie_abort_handler, SIGBUS, 0,
"imprecise external abort");
- cns3xxx_pcie_iotable_init(bitmap);
for (i = 0; i < ARRAY_SIZE(cns3xxx_pcie); i++) {
- if (!(bitmap & (1 << i)))
- continue;
-
cns3xxx_pcie_check_link(&cns3xxx_pcie[i]);
- cns3xxx_pcie_hw_init(&cns3xxx_pcie[i]);
- pci_common_init(&cns3xxx_pcie[i].hw_pci);
+ if (cns3xxx_pcie[i].linked) {
+ cns3xxx_pcie_hw_init(&cns3xxx_pcie[i]);
+ pci_common_init(&cns3xxx_pcie[i].hw_pci);
+ }
}
pci_assign_unassigned_resources();