diff options
Diffstat (limited to 'arch/ppc/syslib/xilinx_pic.c')
| -rw-r--r-- | arch/ppc/syslib/xilinx_pic.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/arch/ppc/syslib/xilinx_pic.c b/arch/ppc/syslib/xilinx_pic.c deleted file mode 100644 index 3b82333e96d..00000000000 --- a/arch/ppc/syslib/xilinx_pic.c +++ /dev/null @@ -1,153 +0,0 @@ -/* - * Interrupt controller driver for Xilinx Virtex-II Pro. - * - * Author: MontaVista Software, Inc. - * source@mvista.com - * - * 2002-2004 (c) MontaVista Software, Inc. This file is licensed under - * the terms of the GNU General Public License version 2. This program - * is licensed "as is" without any warranty of any kind, whether express - * or implied. - */ - -#include <linux/init.h> -#include <linux/irq.h> -#include <asm/io.h> -#include <platforms/4xx/xparameters/xparameters.h> -#include <asm/ibm4xx.h> -#include <asm/machdep.h> - -/* No one else should require these constants, so define them locally here. */ -#define ISR 0 /* Interrupt Status Register */ -#define IPR 1 /* Interrupt Pending Register */ -#define IER 2 /* Interrupt Enable Register */ -#define IAR 3 /* Interrupt Acknowledge Register */ -#define SIE 4 /* Set Interrupt Enable bits */ -#define CIE 5 /* Clear Interrupt Enable bits */ -#define IVR 6 /* Interrupt Vector Register */ -#define MER 7 /* Master Enable Register */ - -#if XPAR_XINTC_USE_DCR == 0 -static volatile u32 *intc; -#define intc_out_be32(addr, mask) out_be32((addr), (mask)) -#define intc_in_be32(addr) in_be32((addr)) -#else -#define intc XPAR_INTC_0_BASEADDR -#define intc_out_be32(addr, mask) mtdcr((addr), (mask)) -#define intc_in_be32(addr) mfdcr((addr)) -#endif - -static void -xilinx_intc_enable(unsigned int irq) -{ - unsigned long mask = (0x00000001 << (irq & 31)); - pr_debug("enable: %d\n", irq); - intc_out_be32(intc + SIE, mask); -} - -static void -xilinx_intc_disable(unsigned int irq) -{ - unsigned long mask = (0x00000001 << (irq & 31)); - pr_debug("disable: %d\n", irq); - intc_out_be32(intc + CIE, mask); -} - -static void -xilinx_intc_disable_and_ack(unsigned int irq) -{ - unsigned long mask = (0x00000001 << (irq & 31)); - pr_debug("disable_and_ack: %d\n", irq); - intc_out_be32(intc + CIE, mask); - if (!(irq_desc[irq].status & IRQ_LEVEL)) - intc_out_be32(intc + IAR, mask); /* ack edge triggered intr */ -} - -static void -xilinx_intc_end(unsigned int irq) -{ - unsigned long mask = (0x00000001 << (irq & 31)); - - pr_debug("end: %d\n", irq); - if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) { - intc_out_be32(intc + SIE, mask); - /* ack level sensitive intr */ - if (irq_desc[irq].status & IRQ_LEVEL) - intc_out_be32(intc + IAR, mask); - } -} - -static struct hw_interrupt_type xilinx_intc = { - .typename = "Xilinx Interrupt Controller", - .enable = xilinx_intc_enable, - .disable = xilinx_intc_disable, - .ack = xilinx_intc_disable_and_ack, - .end = xilinx_intc_end, -}; - -int -xilinx_pic_get_irq(void) -{ - int irq; - - /* - * NOTE: This function is the one that needs to be improved in - * order to handle multiple interrupt controllers. It currently - * is hardcoded to check for interrupts only on the first INTC. - */ - - irq = intc_in_be32(intc + IVR); - if (irq != -1) - irq = irq; - - pr_debug("get_irq: %d\n", irq); - - return (irq); -} - -void __init -ppc4xx_pic_init(void) -{ - int i; - - /* - * NOTE: The assumption here is that NR_IRQS is 32 or less - * (NR_IRQS is 32 for PowerPC 405 cores by default). - */ -#if (NR_IRQS > 32) -#error NR_IRQS > 32 not supported -#endif - -#if XPAR_XINTC_USE_DCR == 0 - intc = ioremap(XPAR_INTC_0_BASEADDR, 32); - - printk(KERN_INFO "Xilinx INTC #0 at 0x%08lX mapped to 0x%08lX\n", - (unsigned long) XPAR_INTC_0_BASEADDR, (unsigned long) intc); -#else - printk(KERN_INFO "Xilinx INTC #0 at 0x%08lX (DCR)\n", - (unsigned long) XPAR_INTC_0_BASEADDR); -#endif - - /* - * Disable all external interrupts until they are - * explicitly requested. - */ - intc_out_be32(intc + IER, 0); - - /* Acknowledge any pending interrupts just in case. */ - intc_out_be32(intc + IAR, ~(u32) 0); - - /* Turn on the Master Enable. */ - intc_out_be32(intc + MER, 0x3UL); - - ppc_md.get_irq = xilinx_pic_get_irq; - - for (i = 0; i < NR_IRQS; ++i) { - irq_desc[i].chip = &xilinx_intc; - - if (XPAR_INTC_0_KIND_OF_INTR & (0x00000001 << i)) - irq_desc[i].status &= ~IRQ_LEVEL; - else - irq_desc[i].status |= IRQ_LEVEL; - } -} |