diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/mach-iop13xx/msi.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/mach-iop13xx/msi.c | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mach-iop13xx/msi.c b/ANDROID_3.4.5/arch/arm/mach-iop13xx/msi.c deleted file mode 100644 index 560d5b2d..00000000 --- a/ANDROID_3.4.5/arch/arm/mach-iop13xx/msi.c +++ /dev/null @@ -1,193 +0,0 @@ -/* - * arch/arm/mach-iop13xx/msi.c - * - * PCI MSI support for the iop13xx processor - * - * Copyright (c) 2006, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 Temple - * Place - Suite 330, Boston, MA 02111-1307 USA. - * - */ -#include <linux/pci.h> -#include <linux/msi.h> -#include <asm/mach/irq.h> -#include <asm/irq.h> - - -#define IOP13XX_NUM_MSI_IRQS 128 -static DECLARE_BITMAP(msi_irq_in_use, IOP13XX_NUM_MSI_IRQS); - -/* IMIPR0 CP6 R8 Page 1 - */ -static u32 read_imipr_0(void) -{ - u32 val; - asm volatile("mrc p6, 0, %0, c8, c1, 0":"=r" (val)); - return val; -} -static void write_imipr_0(u32 val) -{ - asm volatile("mcr p6, 0, %0, c8, c1, 0"::"r" (val)); -} - -/* IMIPR1 CP6 R9 Page 1 - */ -static u32 read_imipr_1(void) -{ - u32 val; - asm volatile("mrc p6, 0, %0, c9, c1, 0":"=r" (val)); - return val; -} -static void write_imipr_1(u32 val) -{ - asm volatile("mcr p6, 0, %0, c9, c1, 0"::"r" (val)); -} - -/* IMIPR2 CP6 R10 Page 1 - */ -static u32 read_imipr_2(void) -{ - u32 val; - asm volatile("mrc p6, 0, %0, c10, c1, 0":"=r" (val)); - return val; -} -static void write_imipr_2(u32 val) -{ - asm volatile("mcr p6, 0, %0, c10, c1, 0"::"r" (val)); -} - -/* IMIPR3 CP6 R11 Page 1 - */ -static u32 read_imipr_3(void) -{ - u32 val; - asm volatile("mrc p6, 0, %0, c11, c1, 0":"=r" (val)); - return val; -} -static void write_imipr_3(u32 val) -{ - asm volatile("mcr p6, 0, %0, c11, c1, 0"::"r" (val)); -} - -static u32 (*read_imipr[])(void) = { - read_imipr_0, - read_imipr_1, - read_imipr_2, - read_imipr_3, -}; - -static void (*write_imipr[])(u32) = { - write_imipr_0, - write_imipr_1, - write_imipr_2, - write_imipr_3, -}; - -static void iop13xx_msi_handler(unsigned int irq, struct irq_desc *desc) -{ - int i, j; - unsigned long status; - - /* read IMIPR registers and find any active interrupts, - * then call ISR for each active interrupt - */ - for (i = 0; i < ARRAY_SIZE(read_imipr); i++) { - status = (read_imipr[i])(); - if (!status) - continue; - - do { - j = find_first_bit(&status, 32); - (write_imipr[i])(1 << j); /* write back to clear bit */ - generic_handle_irq(IRQ_IOP13XX_MSI_0 + j + (32*i)); - status = (read_imipr[i])(); - } while (status); - } -} - -void __init iop13xx_msi_init(void) -{ - irq_set_chained_handler(IRQ_IOP13XX_INBD_MSI, iop13xx_msi_handler); -} - -/* - * Dynamic irq allocate and deallocation - */ -int create_irq(void) -{ - int irq, pos; - -again: - pos = find_first_zero_bit(msi_irq_in_use, IOP13XX_NUM_MSI_IRQS); - irq = IRQ_IOP13XX_MSI_0 + pos; - if (irq > NR_IRQS) - return -ENOSPC; - /* test_and_set_bit operates on 32-bits at a time */ - if (test_and_set_bit(pos, msi_irq_in_use)) - goto again; - - dynamic_irq_init(irq); - - return irq; -} - -void destroy_irq(unsigned int irq) -{ - int pos = irq - IRQ_IOP13XX_MSI_0; - - dynamic_irq_cleanup(irq); - - clear_bit(pos, msi_irq_in_use); -} - -void arch_teardown_msi_irq(unsigned int irq) -{ - destroy_irq(irq); -} - -static void iop13xx_msi_nop(struct irq_data *d) -{ - return; -} - -static struct irq_chip iop13xx_msi_chip = { - .name = "PCI-MSI", - .irq_ack = iop13xx_msi_nop, - .irq_enable = unmask_msi_irq, - .irq_disable = mask_msi_irq, - .irq_mask = mask_msi_irq, - .irq_unmask = unmask_msi_irq, -}; - -int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc) -{ - int id, irq = create_irq(); - struct msi_msg msg; - - if (irq < 0) - return irq; - - irq_set_msi_desc(irq, desc); - - msg.address_hi = 0x0; - msg.address_lo = IOP13XX_MU_MIMR_PCI; - - id = iop13xx_cpu_id(); - msg.data = (id << IOP13XX_MU_MIMR_CORE_SELECT) | (irq & 0x7f); - - write_msi_msg(irq, &msg); - irq_set_chip_and_handler(irq, &iop13xx_msi_chip, handle_simple_irq); - - return 0; -} |