/* via_irq.c * * Copyright 2004 BEAM Ltd. * Copyright 2002 Tungsten Graphics, Inc. * Copyright 2005 Thomas Hellstrom. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * BEAM LTD, TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Authors: * Terry Barnaby * Keith Whitwell * Thomas Hellstrom * * This code provides standard DRM access to the Via Unichrome / Pro Vertical blank * interrupt, as well as an infrastructure to handle other interrupts of the chip. * The refresh rate is also calculated for video playback sync purposes. */ #include "drmP.h" #include "drm.h" #include "via_drm.h" #include "via_drv.h" #define VIA_REG_INTERRUPT 0x200 /* VIA_REG_INTERRUPT */ #define VIA_IRQ_GLOBAL (1 << 31) #define VIA_IRQ_VBLANK_ENABLE (1 << 19) #define VIA_IRQ_VBLANK_PENDING (1 << 3) #define VIA_IRQ_HQV0_ENABLE (1 << 11) #define VIA_IRQ_HQV1_ENABLE (1 << 25) #define VIA_IRQ_HQV0_PENDING (1 << 9) #define VIA_IRQ_HQV1_PENDING (1 << 10) #define VIA_IRQ_DMA0_DD_ENABLE (1 << 20) #define VIA_IRQ_DMA0_TD_ENABLE (1 << 21) #define VIA_IRQ_DMA1_DD_ENABLE (1 << 22) #define VIA_IRQ_DMA1_TD_ENABLE (1 << 23) #define VIA_IRQ_DMA0_DD_PENDING (1 << 4) #define VIA_IRQ_DMA0_TD_PENDING (1 << 5) #define VIA_IRQ_DMA1_DD_PENDING (1 << 6) #define VIA_IRQ_DMA1_TD_PENDING (1 << 7) /* * Device-specific IRQs go here. This type might need to be extended with * the register if there are multiple IRQ control registers. * Currently we activate the HQV interrupts of Unichrome Pro group A. */ static maskarray_t via_pro_group_a_irqs[] = { {VIA_IRQ_HQV0_ENABLE, VIA_IRQ_HQV0_PENDING, 0x000003D0, 0x00008010, 0x00000000}, {VIA_IRQ_HQV1_ENABLE, VIA_IRQ_HQV1_PENDING, 0x000013D0, 0x00008010, 0x00000000}, {VIA_IRQ_DMA0_TD_ENABLE, VIA_IRQ_DMA0_TD_PENDING, VIA_PCI_DMA_CSR0, VIA_DMA_CSR_TA | VIA_DMA_CSR_TD, 0x00000008}, {VIA_IRQ_DMA1_TD_ENABLE, VIA_IRQ_DMA1_TD_PENDING, VIA_PCI_DMA_CSR1, VIA_DMA_CSR_TA | VIA_DMA_CSR_TD, 0x00000008}, }; static int via_num_pro_group_a = sizeof(via_pro_group_a_irqs) / sizeof(maskarray_t); static int via_irqmap_pro_group_a[] = {0, 1, -1, 2, -1, 3}; static maskarray_t via_unichrome_irqs[] = { {VIA_IRQ_DMA0_TD_ENABLE, VIA_IRQ_DMA0_TD_PENDING, VIA_PCI_DMA_CSR0, VIA_DMA_CSR_TA | VIA_DMA_CSR_TD, 0x00000008}, {VIA_IRQ_DMA1_TD_ENABLE, VIA_IRQ_DMA1_TD_PENDING, VIA_PCI_DMA_CSR1, VIA_DMA_CSR_TA | VIA_DMA_CSR_TD, 0x00000008} }; static int via_num_unichrome = sizeof(via_unichrome_irqs) / sizeof(maskarray_t); static int via_irqmap_unichrome[] = {-1, -1, -1, 0, -1, 1}; static unsigned time_diff(struct timeval *now, struct timeval *then) { return (now->tv_usec >= then->tv_usec) ? now->tv_usec - then->tv_usec : 1000000 - (then->tv_usec - now->tv_usec); } irqreturn_t via_driver_irq_handler(DRM_IRQ_ARGS) { drm_device_t *dev = (drm_device_t *) arg; drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; u32 status; int handled = 0; struct timeval cur_vblank; drm_via_irq_t *cur_irq = dev_priv->via_irqs; int i; status = VIA_READ(VIA_REG_INTERRUPT); if (status & VIA_IRQ_VBLANK_PENDING) { atomic_inc(&dev->vbl_received); if (!(atomic_read(&dev->vbl_received) & 0x0F)) { do_gettimeofday(&cur_vblank); if (dev_priv->last_vblank_valid) { dev_priv->usec_per_vblank = time_diff(&cur_vblank, &dev_priv->last_vblank) >> 4; } dev_priv->last_vblank = cur_vblank; dev_priv->last_vblank_valid = 1; } if (!(atomic_read(&dev->vbl_received) & 0xFF)) { DRM_DEBUG("US per vblank is: %u\n", dev_priv->usec_per_vblank); } DRM_WAKEUP(&dev->vbl_queue); drm_vbl_send_signals(dev); handled = 1; } for (i = 0; i < dev_priv->num_irqs; ++i) { if (status & cur_irq->pending_mask) { atomic_inc(&cur_irq->irq_received); DRM_WAKEUP(&cur_irq->irq_queue); handled = 1; if (dev_priv->irq_map[drm_via_irq_dma0_td] == i) { via_dmablit_handler(dev, 0, 1); } else if (dev_priv->irq_map[drm_via_irq_dma1_td] == i) { via_dmablit_handler(dev, 1, 1); } } cur_irq++; } /* Acknowlege interrupts */ VIA_WRITE(VIA_REG_INTERRUPT, status); if (handled) return IRQ_HANDLED; else return IRQ_NONE; } static __inline__ void viadrv_acknowledge_irqs(drm_via_private_t * dev_priv) { u32 status; if (dev_priv) { /* Acknowlege interrupts */ status = VIA_READ(VIA_REG_INTERRUPT); VIA_WRITE(VIA_REG_INTERRUPT, status | dev_priv->irq_pending_mask); } } int via_driver_vblank_wait(drm_device_t * dev, unsigned int *sequence) { drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; unsigned int cur_vblank; int ret = 0; DRM_DEBUG("viadrv_vblank_wait\n"); if (!dev_priv) { DRM_ERROR("%s called with no initialization\n", __FUNCTION__); return -EINVAL; } viadrv_acknowledge_irqs(dev_priv); /* Assume that the user has missed the current sequence number * by about a day rather than she wants to wait for years * using vertical blanks... */ DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ, (((cur_vblank = atomic_read(&dev->vbl_received)) - *sequence) <= (1 << 23))); *sequence = cur_vblank; return ret; } static int via_driver_irq_wait(drm_device_t * dev, unsigned int irq, int force_sequence, unsigned int *sequence) { drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; unsigned int cur_irq_sequence; drm_via_irq_t *cur_irq; int ret = 0; maskarray_t *masks; int real_irq; DRM_DEBUG("%s\n", __FUNCTION__); if (!dev_priv) { DRM_ERROR("%s called with no initialization\n", __FUNCTION__); return DRM_ERR(EINVAL); } if (irq >= drm_via_irq_num) { DRM_ERROR("%s Trying to wait on unknown irq %d\n", __FUNCTION__, irq); return DRM_ERR(EINVAL); } real_irq = dev_priv->irq_map[irq]; if (real_irq < 0) { DRM_ERROR("%s Video IRQ %d not available on this hardware.\n", __FUNCTION__, irq); return DRM_ERR(EINVAL); } masks = dev_priv->irq_masks; cur_irq = dev_priv->via_irqs + real_irq; if (masks[real_irq][2] && !force_sequence) { DRM_WAIT_ON(ret, cur_irq->irq_queue, 3 * DRM_HZ, ((VIA_READ(masks[irq][2]) & masks[irq][3]) == masks[irq][4])); cur_irq_sequence = atomic_read(&cur_irq->irq_received); } else { DRM_WAIT_ON(ret, cur_irq->irq_queue, 3 * DRM_HZ, (((cur_irq_sequence = atomic_read(&cur_irq->irq_received)) - *sequence) <= (1 << 23))); } *sequence = cur_irq_sequence; return ret; } /* * drm_dma.h hooks */ void via_driver_irq_preinstall(drm_device_t * dev) { drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; u32 status; drm_via_irq_t *cur_irq; int i; DRM_DEBUG("driver_irq_preinstall: dev_priv: %p\n", dev_priv); if (dev_priv) { cur_irq = dev_priv->via_irqs; dev_priv->irq_enable_mask = VIA_IRQ_VBLANK_ENABLE; dev_priv->irq_pending_mask = VIA_IRQ_VBLANK_PENDING; dev_priv->irq_masks = (dev_priv->pro_group_a) ? via_pro_group_a_irqs : via_unichrome_irqs; dev_priv->num_irqs = (dev_priv->pro_group_a) ? via_num_pro_group_a : via_num_unichrome; dev_priv->irq_map = (dev_priv->pro_group_a) ? via_irqmap_pro_group_a : via_irqmap_unichrome; for (i = 0; i < dev_priv->num_irqs; ++i) { atomic_set(&cur_irq->irq_received, 0); cur_irq->enable_mask = dev_priv->irq_masks[i][0]; cur_irq->pending_mask = dev_priv->irq_masks[i][1]; DRM_INIT_WAITQUEUE(&cur_irq->irq_queue); dev_priv->irq_enable_mask |= cur_irq->enable_mask; dev_priv->irq_pending_mask |= cur_irq->pending_mask; cur_irq++; DRM_DEBUG("Initializing IRQ %d\n", i); } dev_priv->last_vblank_valid = 0; /* Clear VSync interrupt regs */ status = VIA_READ(VIA_REG_INTERRUPT); VIA_WRITE(VIA_REG_INTERRUPT, status & ~(dev_priv->irq_enable_mask)); /* Clear bits if they're already high */ viadrv_acknowledge_irqs(dev_priv); } } void via_driver_irq_postinstall(drm_device_t * dev) { drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; u32 status; DRM_DEBUG("via_driver_irq_postinstall\n"); if (dev_priv) { status = VIA_READ(VIA_REG_INTERRUPT); VIA_WRITE(VIA_REG_INTERRUPT, status | VIA_IRQ_GLOBAL | dev_priv->irq_enable_mask); /* Some magic, oh for some data sheets ! */ VIA_WRITE8(0x83d4, 0x11); VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) | 0x30); } } void via_driver_irq_uninstall(drm_device_t * dev) { drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; u32 status; DRM_DEBUG("driver_irq_uninstall)\n"); if (dev_priv) { /* Some more magic, oh for some data sheets ! */ VIA_WRITE8(0x83d4, 0x11); VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) & ~0x30); status = VIA_READ(VIA_REG_INTERRUPT); VIA_WRITE(VIA_REG_INTERRUPT, status & ~(VIA_IRQ_VBLANK_ENABLE | dev_priv->irq_enable_mask)); } } int via_wait_irq(DRM_IOCTL_ARGS) { DRM_DEVICE; drm_via_irqwait_t __user *argp = (void __user *)data; drm_via_irqwait_t irqwait; struct timeval now; int ret = 0; drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; drm_via_irq_t *cur_irq = dev_priv->via_irqs; int force_sequence; if (!dev->irq) return DRM_ERR(EINVAL); DRM_COPY_FROM_USER_IOCTL(irqwait, argp, sizeof(irqwait)); if (irqwait.request.irq >= dev_priv->num_irqs) { DRM_ERROR("%s Trying to wait on unknown irq %d\n", __FUNCTION__, irqwait.request.irq); return DRM_ERR(EINVAL); } cur_irq += irqwait.request.irq; switch (irqwait.request.type & ~VIA_IRQ_FLAGS_MASK) { case VIA_IRQ_RELATIVE: irqwait.request.sequence += atomic_read(&cur_irq->irq_received); irqwait.request.type &= ~_DRM_VBLANK_RELATIVE; case VIA_IRQ_ABSOLUTE: break; default: return DRM_ERR(EINVAL); } if (irqwait.request.type & VIA_IRQ_SIGNAL) { DRM_ERROR("%s Signals on Via IRQs not implemented yet.\n", __FUNCTION__); return DRM_ERR(EINVAL); } force_sequence = (irqwait.request.type & VIA_IRQ_FORCE_SEQUENCE); ret = via_driver_irq_wait(dev, irqwait.request.irq, force_sequence, &irqwait.request.sequence); do_gettimeofday(&now); irqwait.reply.tval_sec = now.tv_sec; irqwait.reply.tval_usec = now.tv_usec; DRM_COPY_TO_USER_IOCTL(argp, irqwait, sizeof(irqwait)); return ret; }