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MIPS: Netlogic: Add basic MSI support for XLR/XLS

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Add basic support for MSI.

Signed-off-by: Ganesan Ramalingam <ganesanr@netlogicmicro.com>
Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2730/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ganesan Ramalingam
2011-08-23 13:36:10 +05:30
committed by Ralf Baechle
parent b66f953cd0
commit f32671a867
4 changed files with 140 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
arch/mips/pci/pci-xlr.c
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@ -36,12 +36,16 @@
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/msi.h>
#include <linux/mm.h>
#include <linux/irq.h>
#include <linux/irqdesc.h>
#include <linux/console.h>
#include <asm/io.h>
#include <asm/netlogic/interrupt.h>
#include <asm/netlogic/xlr/msidef.h>
#include <asm/netlogic/xlr/iomap.h>
#include <asm/netlogic/xlr/pic.h>
#include <asm/netlogic/xlr/xlr.h>
@ -150,7 +154,7 @@ struct pci_controller nlm_pci_controller = {
.io_offset = 0x00000000UL,
};
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
static int get_irq_vector(const struct pci_dev *dev)
{
if (!nlm_chip_is_xls())
return PIC_PCIX_IRQ; /* for XLR just one IRQ*/
@ -182,6 +186,51 @@ int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
return 0;
}
#ifdef CONFIG_PCI_MSI
void destroy_irq(unsigned int irq)
{
/* nothing to do yet */
}
void arch_teardown_msi_irq(unsigned int irq)
{
destroy_irq(irq);
}
int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
{
struct msi_msg msg;
int irq, ret;
irq = get_irq_vector(dev);
if (irq <= 0)
return 1;
msg.address_hi = MSI_ADDR_BASE_HI;
msg.address_lo = MSI_ADDR_BASE_LO |
MSI_ADDR_DEST_MODE_PHYSICAL |
MSI_ADDR_REDIRECTION_CPU;
msg.data = MSI_DATA_TRIGGER_EDGE |
MSI_DATA_LEVEL_ASSERT |
MSI_DATA_DELIVERY_FIXED;
ret = irq_set_msi_desc(irq, desc);
if (ret < 0) {
destroy_irq(irq);
return ret;
}
write_msi_msg(irq, &msg);
return 0;
}
#endif
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
return get_irq_vector(dev);
}
/* Do platform specific device initialization at pci_enable_device() time */
int pcibios_plat_dev_init(struct pci_dev *dev)
{