diff options
Diffstat (limited to 'arch/powerpc/sysdev/mpc8xx_pic.c')
| -rw-r--r-- | arch/powerpc/sysdev/mpc8xx_pic.c | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/arch/powerpc/sysdev/mpc8xx_pic.c b/arch/powerpc/sysdev/mpc8xx_pic.c deleted file mode 100644 index 2842f9d63d21..000000000000 --- a/arch/powerpc/sysdev/mpc8xx_pic.c +++ /dev/null @@ -1,163 +0,0 @@ -#include <linux/kernel.h> -#include <linux/stddef.h> -#include <linux/sched.h> -#include <linux/signal.h> -#include <linux/irq.h> -#include <linux/dma-mapping.h> -#include <asm/prom.h> -#include <asm/irq.h> -#include <asm/io.h> -#include <asm/8xx_immap.h> - -#include "mpc8xx_pic.h" - - -#define PIC_VEC_SPURRIOUS 15 - -extern int cpm_get_irq(struct pt_regs *regs); - -static struct irq_domain *mpc8xx_pic_host; -static unsigned long mpc8xx_cached_irq_mask; -static sysconf8xx_t __iomem *siu_reg; - -static inline unsigned long mpc8xx_irqd_to_bit(struct irq_data *d) -{ - return 0x80000000 >> irqd_to_hwirq(d); -} - -static void mpc8xx_unmask_irq(struct irq_data *d) -{ - mpc8xx_cached_irq_mask |= mpc8xx_irqd_to_bit(d); - out_be32(&siu_reg->sc_simask, mpc8xx_cached_irq_mask); -} - -static void mpc8xx_mask_irq(struct irq_data *d) -{ - mpc8xx_cached_irq_mask &= ~mpc8xx_irqd_to_bit(d); - out_be32(&siu_reg->sc_simask, mpc8xx_cached_irq_mask); -} - -static void mpc8xx_ack(struct irq_data *d) -{ - out_be32(&siu_reg->sc_sipend, mpc8xx_irqd_to_bit(d)); -} - -static void mpc8xx_end_irq(struct irq_data *d) -{ - mpc8xx_cached_irq_mask |= mpc8xx_irqd_to_bit(d); - out_be32(&siu_reg->sc_simask, mpc8xx_cached_irq_mask); -} - -static int mpc8xx_set_irq_type(struct irq_data *d, unsigned int flow_type) -{ - /* only external IRQ senses are programmable */ - if ((flow_type & IRQ_TYPE_EDGE_FALLING) && !(irqd_to_hwirq(d) & 1)) { - unsigned int siel = in_be32(&siu_reg->sc_siel); - siel |= mpc8xx_irqd_to_bit(d); - out_be32(&siu_reg->sc_siel, siel); - irq_set_handler_locked(d, handle_edge_irq); - } - return 0; -} - -static struct irq_chip mpc8xx_pic = { - .name = "8XX SIU", - .irq_unmask = mpc8xx_unmask_irq, - .irq_mask = mpc8xx_mask_irq, - .irq_ack = mpc8xx_ack, - .irq_eoi = mpc8xx_end_irq, - .irq_set_type = mpc8xx_set_irq_type, -}; - -unsigned int mpc8xx_get_irq(void) -{ - int irq; - - /* For MPC8xx, read the SIVEC register and shift the bits down - * to get the irq number. - */ - irq = in_be32(&siu_reg->sc_sivec) >> 26; - - if (irq == PIC_VEC_SPURRIOUS) - return 0; - - return irq_linear_revmap(mpc8xx_pic_host, irq); - -} - -static int mpc8xx_pic_host_map(struct irq_domain *h, unsigned int virq, - irq_hw_number_t hw) -{ - pr_debug("mpc8xx_pic_host_map(%d, 0x%lx)\n", virq, hw); - - /* Set default irq handle */ - irq_set_chip_and_handler(virq, &mpc8xx_pic, handle_level_irq); - return 0; -} - - -static int mpc8xx_pic_host_xlate(struct irq_domain *h, struct device_node *ct, - const u32 *intspec, unsigned int intsize, - irq_hw_number_t *out_hwirq, unsigned int *out_flags) -{ - static unsigned char map_pic_senses[4] = { - IRQ_TYPE_EDGE_RISING, - IRQ_TYPE_LEVEL_LOW, - IRQ_TYPE_LEVEL_HIGH, - IRQ_TYPE_EDGE_FALLING, - }; - - if (intspec[0] > 0x1f) - return 0; - - *out_hwirq = intspec[0]; - if (intsize > 1 && intspec[1] < 4) - *out_flags = map_pic_senses[intspec[1]]; - else - *out_flags = IRQ_TYPE_NONE; - - return 0; -} - - -static const struct irq_domain_ops mpc8xx_pic_host_ops = { - .map = mpc8xx_pic_host_map, - .xlate = mpc8xx_pic_host_xlate, -}; - -int mpc8xx_pic_init(void) -{ - struct resource res; - struct device_node *np; - int ret; - - np = of_find_compatible_node(NULL, NULL, "fsl,pq1-pic"); - if (np == NULL) - np = of_find_node_by_type(NULL, "mpc8xx-pic"); - if (np == NULL) { - printk(KERN_ERR "Could not find fsl,pq1-pic node\n"); - return -ENOMEM; - } - - ret = of_address_to_resource(np, 0, &res); - if (ret) - goto out; - - siu_reg = ioremap(res.start, resource_size(&res)); - if (siu_reg == NULL) { - ret = -EINVAL; - goto out; - } - - mpc8xx_pic_host = irq_domain_add_linear(np, 64, &mpc8xx_pic_host_ops, NULL); - if (mpc8xx_pic_host == NULL) { - printk(KERN_ERR "MPC8xx PIC: failed to allocate irq host!\n"); - ret = -ENOMEM; - goto out; - } - return 0; - -out: - of_node_put(np); - return ret; -} |