diff options
Diffstat (limited to 'arch/powerpc/sysdev/mpc52xx_pic.c')
| -rw-r--r-- | arch/powerpc/sysdev/mpc52xx_pic.c | 538 |
1 files changed, 0 insertions, 538 deletions
diff --git a/arch/powerpc/sysdev/mpc52xx_pic.c b/arch/powerpc/sysdev/mpc52xx_pic.c deleted file mode 100644 index 6df51f04b8f..00000000000 --- a/arch/powerpc/sysdev/mpc52xx_pic.c +++ /dev/null @@ -1,538 +0,0 @@ -/* - * - * Programmable Interrupt Controller functions for the Freescale MPC52xx. - * - * Copyright (C) 2006 bplan GmbH - * - * Based on the code from the 2.4 kernel by - * Dale Farnsworth <dfarnsworth@mvista.com> and Kent Borg. - * - * Copyright (C) 2004 Sylvain Munaut <tnt@246tNt.com> - * Copyright (C) 2003 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. - * - */ - -#undef DEBUG - -#include <linux/stddef.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/signal.h> -#include <linux/stddef.h> -#include <linux/delay.h> -#include <linux/irq.h> -#include <linux/hardirq.h> - -#include <asm/io.h> -#include <asm/processor.h> -#include <asm/system.h> -#include <asm/irq.h> -#include <asm/prom.h> -#include <asm/mpc52xx.h> - -/* - * -*/ - -static struct mpc52xx_intr __iomem *intr; -static struct mpc52xx_sdma __iomem *sdma; -static struct irq_host *mpc52xx_irqhost = NULL; - -static unsigned char mpc52xx_map_senses[4] = { - IRQ_TYPE_LEVEL_HIGH, - IRQ_TYPE_EDGE_RISING, - IRQ_TYPE_EDGE_FALLING, - IRQ_TYPE_LEVEL_LOW, -}; - -/* - * -*/ - -static inline void io_be_setbit(u32 __iomem * addr, int bitno) -{ - out_be32(addr, in_be32(addr) | (1 << bitno)); -} - -static inline void io_be_clrbit(u32 __iomem * addr, int bitno) -{ - out_be32(addr, in_be32(addr) & ~(1 << bitno)); -} - -/* - * IRQ[0-3] interrupt irq_chip -*/ - -static void mpc52xx_extirq_mask(unsigned int virq) -{ - int irq; - int l2irq; - - irq = irq_map[virq].hwirq; - l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET; - - pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq); - - io_be_clrbit(&intr->ctrl, 11 - l2irq); -} - -static void mpc52xx_extirq_unmask(unsigned int virq) -{ - int irq; - int l2irq; - - irq = irq_map[virq].hwirq; - l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET; - - pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq); - - io_be_setbit(&intr->ctrl, 11 - l2irq); -} - -static void mpc52xx_extirq_ack(unsigned int virq) -{ - int irq; - int l2irq; - - irq = irq_map[virq].hwirq; - l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET; - - pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq); - - io_be_setbit(&intr->ctrl, 27 - l2irq); -} - -static struct irq_chip mpc52xx_extirq_irqchip = { - .typename = " MPC52xx IRQ[0-3] ", - .mask = mpc52xx_extirq_mask, - .unmask = mpc52xx_extirq_unmask, - .ack = mpc52xx_extirq_ack, -}; - -/* - * Main interrupt irq_chip -*/ - -static void mpc52xx_main_mask(unsigned int virq) -{ - int irq; - int l2irq; - - irq = irq_map[virq].hwirq; - l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET; - - pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq); - - io_be_setbit(&intr->main_mask, 15 - l2irq); -} - -static void mpc52xx_main_unmask(unsigned int virq) -{ - int irq; - int l2irq; - - irq = irq_map[virq].hwirq; - l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET; - - pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq); - - io_be_clrbit(&intr->main_mask, 15 - l2irq); -} - -static struct irq_chip mpc52xx_main_irqchip = { - .typename = "MPC52xx Main", - .mask = mpc52xx_main_mask, - .mask_ack = mpc52xx_main_mask, - .unmask = mpc52xx_main_unmask, -}; - -/* - * Peripherals interrupt irq_chip -*/ - -static void mpc52xx_periph_mask(unsigned int virq) -{ - int irq; - int l2irq; - - irq = irq_map[virq].hwirq; - l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET; - - pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq); - - io_be_setbit(&intr->per_mask, 31 - l2irq); -} - -static void mpc52xx_periph_unmask(unsigned int virq) -{ - int irq; - int l2irq; - - irq = irq_map[virq].hwirq; - l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET; - - pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq); - - io_be_clrbit(&intr->per_mask, 31 - l2irq); -} - -static struct irq_chip mpc52xx_periph_irqchip = { - .typename = "MPC52xx Peripherals", - .mask = mpc52xx_periph_mask, - .mask_ack = mpc52xx_periph_mask, - .unmask = mpc52xx_periph_unmask, -}; - -/* - * SDMA interrupt irq_chip -*/ - -static void mpc52xx_sdma_mask(unsigned int virq) -{ - int irq; - int l2irq; - - irq = irq_map[virq].hwirq; - l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET; - - pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq); - - io_be_setbit(&sdma->IntMask, l2irq); -} - -static void mpc52xx_sdma_unmask(unsigned int virq) -{ - int irq; - int l2irq; - - irq = irq_map[virq].hwirq; - l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET; - - pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq); - - io_be_clrbit(&sdma->IntMask, l2irq); -} - -static void mpc52xx_sdma_ack(unsigned int virq) -{ - int irq; - int l2irq; - - irq = irq_map[virq].hwirq; - l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET; - - pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq); - - out_be32(&sdma->IntPend, 1 << l2irq); -} - -static struct irq_chip mpc52xx_sdma_irqchip = { - .typename = "MPC52xx SDMA", - .mask = mpc52xx_sdma_mask, - .unmask = mpc52xx_sdma_unmask, - .ack = mpc52xx_sdma_ack, -}; - -/* - * irq_host -*/ - -static int mpc52xx_irqhost_match(struct irq_host *h, struct device_node *node) -{ - pr_debug("%s: node=%p\n", __func__, node); - return mpc52xx_irqhost->host_data == node; -} - -static int mpc52xx_irqhost_xlate(struct irq_host *h, struct device_node *ct, - u32 * intspec, unsigned int intsize, - irq_hw_number_t * out_hwirq, - unsigned int *out_flags) -{ - int intrvect_l1; - int intrvect_l2; - int intrvect_type; - int intrvect_linux; - - if (intsize != 3) - return -1; - - intrvect_l1 = (int)intspec[0]; - intrvect_l2 = (int)intspec[1]; - intrvect_type = (int)intspec[2]; - - intrvect_linux = - (intrvect_l1 << MPC52xx_IRQ_L1_OFFSET) & MPC52xx_IRQ_L1_MASK; - intrvect_linux |= - (intrvect_l2 << MPC52xx_IRQ_L2_OFFSET) & MPC52xx_IRQ_L2_MASK; - - pr_debug("return %x, l1=%d, l2=%d\n", intrvect_linux, intrvect_l1, - intrvect_l2); - - *out_hwirq = intrvect_linux; - *out_flags = mpc52xx_map_senses[intrvect_type]; - - return 0; -} - -/* - * this function retrieves the correct IRQ type out - * of the MPC regs - * Only externals IRQs needs this -*/ -static int mpc52xx_irqx_gettype(int irq) -{ - int type; - u32 ctrl_reg; - - ctrl_reg = in_be32(&intr->ctrl); - type = (ctrl_reg >> (22 - irq * 2)) & 0x3; - - return mpc52xx_map_senses[type]; -} - -static int mpc52xx_irqhost_map(struct irq_host *h, unsigned int virq, - irq_hw_number_t irq) -{ - int l1irq; - int l2irq; - struct irq_chip *good_irqchip; - void *good_handle; - int type; - - l1irq = (irq & MPC52xx_IRQ_L1_MASK) >> MPC52xx_IRQ_L1_OFFSET; - l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET; - - /* - * Most of ours IRQs will be level low - * Only external IRQs on some platform may be others - */ - type = IRQ_TYPE_LEVEL_LOW; - - switch (l1irq) { - case MPC52xx_IRQ_L1_CRIT: - pr_debug("%s: Critical. l2=%x\n", __func__, l2irq); - - BUG_ON(l2irq != 0); - - type = mpc52xx_irqx_gettype(l2irq); - good_irqchip = &mpc52xx_extirq_irqchip; - break; - - case MPC52xx_IRQ_L1_MAIN: - pr_debug("%s: Main IRQ[1-3] l2=%x\n", __func__, l2irq); - - if ((l2irq >= 1) && (l2irq <= 3)) { - type = mpc52xx_irqx_gettype(l2irq); - good_irqchip = &mpc52xx_extirq_irqchip; - } else { - good_irqchip = &mpc52xx_main_irqchip; - } - break; - - case MPC52xx_IRQ_L1_PERP: - pr_debug("%s: Peripherals. l2=%x\n", __func__, l2irq); - good_irqchip = &mpc52xx_periph_irqchip; - break; - - case MPC52xx_IRQ_L1_SDMA: - pr_debug("%s: SDMA. l2=%x\n", __func__, l2irq); - good_irqchip = &mpc52xx_sdma_irqchip; - break; - - default: - pr_debug("%s: Error, unknown L1 IRQ (0x%x)\n", __func__, l1irq); - printk(KERN_ERR "Unknow IRQ!\n"); - return -EINVAL; - } - - switch (type) { - case IRQ_TYPE_EDGE_FALLING: - case IRQ_TYPE_EDGE_RISING: - good_handle = handle_edge_irq; - break; - default: - good_handle = handle_level_irq; - } - - set_irq_chip_and_handler(virq, good_irqchip, good_handle); - - pr_debug("%s: virq=%x, hw=%x. type=%x\n", __func__, virq, - (int)irq, type); - - return 0; -} - -static struct irq_host_ops mpc52xx_irqhost_ops = { - .match = mpc52xx_irqhost_match, - .xlate = mpc52xx_irqhost_xlate, - .map = mpc52xx_irqhost_map, -}; - -/* - * init (public) -*/ - -void __init mpc52xx_init_irq(void) -{ - struct device_node *picnode = NULL; - int picnode_regsize; - u32 picnode_regoffset; - - struct device_node *sdmanode = NULL; - int sdmanode_regsize; - u32 sdmanode_regoffset; - - u64 size64; - int flags; - - u32 intr_ctrl; - - picnode = of_find_compatible_node(NULL, "interrupt-controller", - "mpc5200-pic"); - if (picnode == NULL) { - printk(KERN_ERR "MPC52xx PIC: " - "Unable to find the interrupt controller " - "in the OpenFirmware device tree\n"); - goto end; - } - - sdmanode = of_find_compatible_node(NULL, "dma-controller", - "mpc5200-bestcomm"); - if (sdmanode == NULL) { - printk(KERN_ERR "MPC52xx PIC" - "Unable to find the Bestcomm DMA controller device " - "in the OpenFirmware device tree\n"); - goto end; - } - - /* Retrieve PIC ressources */ - picnode_regoffset = (u32) of_get_address(picnode, 0, &size64, &flags); - if (picnode_regoffset == 0) { - printk(KERN_ERR "MPC52xx PIC" - "Unable to get the interrupt controller address\n"); - goto end; - } - - picnode_regoffset = - of_translate_address(picnode, (u32 *) picnode_regoffset); - picnode_regsize = (int)size64; - - /* Retrieve SDMA ressources */ - sdmanode_regoffset = (u32) of_get_address(sdmanode, 0, &size64, &flags); - if (sdmanode_regoffset == 0) { - printk(KERN_ERR "MPC52xx PIC: " - "Unable to get the Bestcomm DMA controller address\n"); - goto end; - } - - sdmanode_regoffset = - of_translate_address(sdmanode, (u32 *) sdmanode_regoffset); - sdmanode_regsize = (int)size64; - - /* Remap the necessary zones */ - intr = ioremap(picnode_regoffset, picnode_regsize); - if (intr == NULL) { - printk(KERN_ERR "MPC52xx PIC: " - "Unable to ioremap interrupt controller registers!\n"); - goto end; - } - - sdma = ioremap(sdmanode_regoffset, sdmanode_regsize); - if (sdma == NULL) { - iounmap(intr); - printk(KERN_ERR "MPC52xx PIC: " - "Unable to ioremap Bestcomm DMA registers!\n"); - goto end; - } - - printk(KERN_INFO "MPC52xx PIC: MPC52xx PIC Remapped at 0x%8.8x\n", - picnode_regoffset); - printk(KERN_INFO "MPC52xx PIC: MPC52xx SDMA Remapped at 0x%8.8x\n", - sdmanode_regoffset); - - /* Disable all interrupt sources. */ - out_be32(&sdma->IntPend, 0xffffffff); /* 1 means clear pending */ - out_be32(&sdma->IntMask, 0xffffffff); /* 1 means disabled */ - out_be32(&intr->per_mask, 0x7ffffc00); /* 1 means disabled */ - out_be32(&intr->main_mask, 0x00010fff); /* 1 means disabled */ - intr_ctrl = in_be32(&intr->ctrl); - intr_ctrl &= 0x00ff0000; /* Keeps IRQ[0-3] config */ - intr_ctrl |= 0x0f000000 | /* clear IRQ 0-3 */ - 0x00001000 | /* MEE master external enable */ - 0x00000000 | /* 0 means disable IRQ 0-3 */ - 0x00000001; /* CEb route critical normally */ - out_be32(&intr->ctrl, intr_ctrl); - - /* Zero a bunch of the priority settings. */ - out_be32(&intr->per_pri1, 0); - out_be32(&intr->per_pri2, 0); - out_be32(&intr->per_pri3, 0); - out_be32(&intr->main_pri1, 0); - out_be32(&intr->main_pri2, 0); - - /* - * As last step, add an irq host to translate the real - * hw irq information provided by the ofw to linux virq - */ - - mpc52xx_irqhost = - irq_alloc_host(IRQ_HOST_MAP_LINEAR, MPC52xx_IRQ_HIGHTESTHWIRQ, - &mpc52xx_irqhost_ops, -1); - - if (mpc52xx_irqhost) { - mpc52xx_irqhost->host_data = picnode; - printk(KERN_INFO "MPC52xx PIC is up and running!\n"); - } else { - printk(KERN_ERR - "MPC52xx PIC: Unable to allocate the IRQ host\n"); - } - -end: - of_node_put(picnode); - of_node_put(sdmanode); -} - -/* - * get_irq (public) -*/ -unsigned int mpc52xx_get_irq(void) -{ - u32 status; - int irq = NO_IRQ_IGNORE; - - status = in_be32(&intr->enc_status); - if (status & 0x00000400) { /* critical */ - irq = (status >> 8) & 0x3; - if (irq == 2) /* high priority peripheral */ - goto peripheral; - irq |= (MPC52xx_IRQ_L1_CRIT << MPC52xx_IRQ_L1_OFFSET) & - MPC52xx_IRQ_L1_MASK; - } else if (status & 0x00200000) { /* main */ - irq = (status >> 16) & 0x1f; - if (irq == 4) /* low priority peripheral */ - goto peripheral; - irq |= (MPC52xx_IRQ_L1_MAIN << MPC52xx_IRQ_L1_OFFSET) & - MPC52xx_IRQ_L1_MASK; - } else if (status & 0x20000000) { /* peripheral */ - peripheral: - irq = (status >> 24) & 0x1f; - if (irq == 0) { /* bestcomm */ - status = in_be32(&sdma->IntPend); - irq = ffs(status) - 1; - irq |= (MPC52xx_IRQ_L1_SDMA << MPC52xx_IRQ_L1_OFFSET) & - MPC52xx_IRQ_L1_MASK; - } else - irq |= (MPC52xx_IRQ_L1_PERP << MPC52xx_IRQ_L1_OFFSET) & - MPC52xx_IRQ_L1_MASK; - } - - pr_debug("%s: irq=%x. virq=%d\n", __func__, irq, - irq_linear_revmap(mpc52xx_irqhost, irq)); - - return irq_linear_revmap(mpc52xx_irqhost, irq); -} - |