Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 1 | /* via_irq.c |
| 2 | * |
| 3 | * Copyright 2004 BEAM Ltd. |
| 4 | * Copyright 2002 Tungsten Graphics, Inc. |
| 5 | * Copyright 2005 Thomas Hellstrom. |
| 6 | * All Rights Reserved. |
| 7 | * |
| 8 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 9 | * copy of this software and associated documentation files (the "Software"), |
| 10 | * to deal in the Software without restriction, including without limitation |
| 11 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 12 | * and/or sell copies of the Software, and to permit persons to whom the |
| 13 | * Software is furnished to do so, subject to the following conditions: |
| 14 | * |
| 15 | * The above copyright notice and this permission notice (including the next |
| 16 | * paragraph) shall be included in all copies or substantial portions of the |
| 17 | * Software. |
| 18 | * |
| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 22 | * BEAM LTD, TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
| 23 | * DAMAGES OR |
| 24 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 25 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 26 | * DEALINGS IN THE SOFTWARE. |
| 27 | * |
| 28 | * Authors: |
| 29 | * Terry Barnaby <terry1@beam.ltd.uk> |
| 30 | * Keith Whitwell <keith@tungstengraphics.com> |
| 31 | * Thomas Hellstrom <unichrome@shipmail.org> |
| 32 | * |
| 33 | * This code provides standard DRM access to the Via Unichrome / Pro Vertical blank |
| 34 | * interrupt, as well as an infrastructure to handle other interrupts of the chip. |
| 35 | * The refresh rate is also calculated for video playback sync purposes. |
| 36 | */ |
| 37 | |
| 38 | #include "drmP.h" |
| 39 | #include "drm.h" |
| 40 | #include "via_drm.h" |
| 41 | #include "via_drv.h" |
| 42 | |
| 43 | #define VIA_REG_INTERRUPT 0x200 |
| 44 | |
| 45 | /* VIA_REG_INTERRUPT */ |
| 46 | #define VIA_IRQ_GLOBAL (1 << 31) |
| 47 | #define VIA_IRQ_VBLANK_ENABLE (1 << 19) |
| 48 | #define VIA_IRQ_VBLANK_PENDING (1 << 3) |
| 49 | #define VIA_IRQ_HQV0_ENABLE (1 << 11) |
| 50 | #define VIA_IRQ_HQV1_ENABLE (1 << 25) |
| 51 | #define VIA_IRQ_HQV0_PENDING (1 << 9) |
| 52 | #define VIA_IRQ_HQV1_PENDING (1 << 10) |
| 53 | |
| 54 | /* |
| 55 | * Device-specific IRQs go here. This type might need to be extended with |
| 56 | * the register if there are multiple IRQ control registers. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 57 | * Currently we activate the HQV interrupts of Unichrome Pro group A. |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 58 | */ |
| 59 | |
| 60 | static maskarray_t via_pro_group_a_irqs[] = { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 61 | {VIA_IRQ_HQV0_ENABLE, VIA_IRQ_HQV0_PENDING, 0x000003D0, 0x00008010, |
| 62 | 0x00000000}, |
| 63 | {VIA_IRQ_HQV1_ENABLE, VIA_IRQ_HQV1_PENDING, 0x000013D0, 0x00008010, |
| 64 | 0x00000000} |
| 65 | }; |
| 66 | static int via_num_pro_group_a = |
| 67 | sizeof(via_pro_group_a_irqs) / sizeof(maskarray_t); |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 68 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 69 | static maskarray_t via_unichrome_irqs[] = { }; |
| 70 | static int via_num_unichrome = sizeof(via_unichrome_irqs) / sizeof(maskarray_t); |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 71 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 72 | static unsigned time_diff(struct timeval *now, struct timeval *then) |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 73 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 74 | return (now->tv_usec >= then->tv_usec) ? |
| 75 | now->tv_usec - then->tv_usec : |
| 76 | 1000000 - (then->tv_usec - now->tv_usec); |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | irqreturn_t via_driver_irq_handler(DRM_IRQ_ARGS) |
| 80 | { |
| 81 | drm_device_t *dev = (drm_device_t *) arg; |
| 82 | drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; |
| 83 | u32 status; |
| 84 | int handled = 0; |
| 85 | struct timeval cur_vblank; |
| 86 | drm_via_irq_t *cur_irq = dev_priv->via_irqs; |
| 87 | int i; |
| 88 | |
| 89 | status = VIA_READ(VIA_REG_INTERRUPT); |
| 90 | if (status & VIA_IRQ_VBLANK_PENDING) { |
| 91 | atomic_inc(&dev->vbl_received); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 92 | if (!(atomic_read(&dev->vbl_received) & 0x0F)) { |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 93 | do_gettimeofday(&cur_vblank); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 94 | if (dev_priv->last_vblank_valid) { |
| 95 | dev_priv->usec_per_vblank = |
| 96 | time_diff(&cur_vblank, |
| 97 | &dev_priv->last_vblank) >> 4; |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 98 | } |
| 99 | dev_priv->last_vblank = cur_vblank; |
| 100 | dev_priv->last_vblank_valid = 1; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 101 | } |
| 102 | if (!(atomic_read(&dev->vbl_received) & 0xFF)) { |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 103 | DRM_DEBUG("US per vblank is: %u\n", |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 104 | dev_priv->usec_per_vblank); |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 105 | } |
| 106 | DRM_WAKEUP(&dev->vbl_queue); |
| 107 | drm_vbl_send_signals(dev); |
| 108 | handled = 1; |
| 109 | } |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 110 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 111 | for (i = 0; i < dev_priv->num_irqs; ++i) { |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 112 | if (status & cur_irq->pending_mask) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 113 | atomic_inc(&cur_irq->irq_received); |
| 114 | DRM_WAKEUP(&cur_irq->irq_queue); |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 115 | handled = 1; |
| 116 | } |
| 117 | cur_irq++; |
| 118 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 119 | |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 120 | /* Acknowlege interrupts */ |
| 121 | VIA_WRITE(VIA_REG_INTERRUPT, status); |
| 122 | |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 123 | if (handled) |
| 124 | return IRQ_HANDLED; |
| 125 | else |
| 126 | return IRQ_NONE; |
| 127 | } |
| 128 | |
| 129 | static __inline__ void viadrv_acknowledge_irqs(drm_via_private_t * dev_priv) |
| 130 | { |
| 131 | u32 status; |
| 132 | |
| 133 | if (dev_priv) { |
| 134 | /* Acknowlege interrupts */ |
| 135 | status = VIA_READ(VIA_REG_INTERRUPT); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 136 | VIA_WRITE(VIA_REG_INTERRUPT, status | |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 137 | dev_priv->irq_pending_mask); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | int via_driver_vblank_wait(drm_device_t * dev, unsigned int *sequence) |
| 142 | { |
| 143 | drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; |
| 144 | unsigned int cur_vblank; |
| 145 | int ret = 0; |
| 146 | |
| 147 | DRM_DEBUG("viadrv_vblank_wait\n"); |
| 148 | if (!dev_priv) { |
| 149 | DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| 150 | return -EINVAL; |
| 151 | } |
| 152 | |
| 153 | viadrv_acknowledge_irqs(dev_priv); |
| 154 | |
| 155 | /* Assume that the user has missed the current sequence number |
| 156 | * by about a day rather than she wants to wait for years |
| 157 | * using vertical blanks... |
| 158 | */ |
| 159 | |
| 160 | DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ, |
| 161 | (((cur_vblank = atomic_read(&dev->vbl_received)) - |
| 162 | *sequence) <= (1 << 23))); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 163 | |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 164 | *sequence = cur_vblank; |
| 165 | return ret; |
| 166 | } |
| 167 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 168 | static int |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 169 | via_driver_irq_wait(drm_device_t * dev, unsigned int irq, int force_sequence, |
| 170 | unsigned int *sequence) |
| 171 | { |
| 172 | drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; |
| 173 | unsigned int cur_irq_sequence; |
| 174 | drm_via_irq_t *cur_irq = dev_priv->via_irqs; |
| 175 | int ret = 0; |
| 176 | maskarray_t *masks = dev_priv->irq_masks; |
| 177 | |
| 178 | DRM_DEBUG("%s\n", __FUNCTION__); |
| 179 | |
| 180 | if (!dev_priv) { |
| 181 | DRM_ERROR("%s called with no initialization\n", __FUNCTION__); |
| 182 | return DRM_ERR(EINVAL); |
| 183 | } |
| 184 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 185 | if (irq >= dev_priv->num_irqs) { |
| 186 | DRM_ERROR("%s Trying to wait on unknown irq %d\n", __FUNCTION__, |
| 187 | irq); |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 188 | return DRM_ERR(EINVAL); |
| 189 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 190 | |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 191 | cur_irq += irq; |
| 192 | |
| 193 | if (masks[irq][2] && !force_sequence) { |
| 194 | DRM_WAIT_ON(ret, cur_irq->irq_queue, 3 * DRM_HZ, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 195 | ((VIA_READ(masks[irq][2]) & masks[irq][3]) == |
| 196 | masks[irq][4])); |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 197 | cur_irq_sequence = atomic_read(&cur_irq->irq_received); |
| 198 | } else { |
| 199 | DRM_WAIT_ON(ret, cur_irq->irq_queue, 3 * DRM_HZ, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 200 | (((cur_irq_sequence = |
| 201 | atomic_read(&cur_irq->irq_received)) - |
| 202 | *sequence) <= (1 << 23))); |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 203 | } |
| 204 | *sequence = cur_irq_sequence; |
| 205 | return ret; |
| 206 | } |
| 207 | |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 208 | /* |
| 209 | * drm_dma.h hooks |
| 210 | */ |
| 211 | |
| 212 | void via_driver_irq_preinstall(drm_device_t * dev) |
| 213 | { |
| 214 | drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; |
| 215 | u32 status; |
| 216 | drm_via_irq_t *cur_irq = dev_priv->via_irqs; |
| 217 | int i; |
| 218 | |
| 219 | DRM_DEBUG("driver_irq_preinstall: dev_priv: %p\n", dev_priv); |
| 220 | if (dev_priv) { |
| 221 | |
| 222 | dev_priv->irq_enable_mask = VIA_IRQ_VBLANK_ENABLE; |
| 223 | dev_priv->irq_pending_mask = VIA_IRQ_VBLANK_PENDING; |
| 224 | |
| 225 | dev_priv->irq_masks = (dev_priv->pro_group_a) ? |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 226 | via_pro_group_a_irqs : via_unichrome_irqs; |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 227 | dev_priv->num_irqs = (dev_priv->pro_group_a) ? |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 228 | via_num_pro_group_a : via_num_unichrome; |
| 229 | |
| 230 | for (i = 0; i < dev_priv->num_irqs; ++i) { |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 231 | atomic_set(&cur_irq->irq_received, 0); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 232 | cur_irq->enable_mask = dev_priv->irq_masks[i][0]; |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 233 | cur_irq->pending_mask = dev_priv->irq_masks[i][1]; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 234 | DRM_INIT_WAITQUEUE(&cur_irq->irq_queue); |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 235 | dev_priv->irq_enable_mask |= cur_irq->enable_mask; |
| 236 | dev_priv->irq_pending_mask |= cur_irq->pending_mask; |
| 237 | cur_irq++; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 238 | |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 239 | DRM_DEBUG("Initializing IRQ %d\n", i); |
| 240 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 241 | |
| 242 | dev_priv->last_vblank_valid = 0; |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 243 | |
| 244 | // Clear VSync interrupt regs |
| 245 | status = VIA_READ(VIA_REG_INTERRUPT); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 246 | VIA_WRITE(VIA_REG_INTERRUPT, status & |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 247 | ~(dev_priv->irq_enable_mask)); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 248 | |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 249 | /* Clear bits if they're already high */ |
| 250 | viadrv_acknowledge_irqs(dev_priv); |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | void via_driver_irq_postinstall(drm_device_t * dev) |
| 255 | { |
| 256 | drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; |
| 257 | u32 status; |
| 258 | |
| 259 | DRM_DEBUG("via_driver_irq_postinstall\n"); |
| 260 | if (dev_priv) { |
| 261 | status = VIA_READ(VIA_REG_INTERRUPT); |
| 262 | VIA_WRITE(VIA_REG_INTERRUPT, status | VIA_IRQ_GLOBAL |
| 263 | | dev_priv->irq_enable_mask); |
| 264 | |
| 265 | /* Some magic, oh for some data sheets ! */ |
| 266 | |
| 267 | VIA_WRITE8(0x83d4, 0x11); |
| 268 | VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) | 0x30); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 269 | |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 270 | } |
| 271 | } |
| 272 | |
| 273 | void via_driver_irq_uninstall(drm_device_t * dev) |
| 274 | { |
| 275 | drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; |
| 276 | u32 status; |
| 277 | |
| 278 | DRM_DEBUG("driver_irq_uninstall)\n"); |
| 279 | if (dev_priv) { |
| 280 | |
| 281 | /* Some more magic, oh for some data sheets ! */ |
| 282 | |
| 283 | VIA_WRITE8(0x83d4, 0x11); |
| 284 | VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) & ~0x30); |
| 285 | |
| 286 | status = VIA_READ(VIA_REG_INTERRUPT); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 287 | VIA_WRITE(VIA_REG_INTERRUPT, status & |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 288 | ~(VIA_IRQ_VBLANK_ENABLE | dev_priv->irq_enable_mask)); |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | int via_wait_irq(DRM_IOCTL_ARGS) |
| 293 | { |
| 294 | drm_file_t *priv = filp->private_data; |
| 295 | drm_device_t *dev = priv->head->dev; |
| 296 | drm_via_irqwait_t __user *argp = (void __user *)data; |
| 297 | drm_via_irqwait_t irqwait; |
| 298 | struct timeval now; |
| 299 | int ret = 0; |
| 300 | drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; |
| 301 | drm_via_irq_t *cur_irq = dev_priv->via_irqs; |
| 302 | int force_sequence; |
| 303 | |
| 304 | if (!dev->irq) |
| 305 | return DRM_ERR(EINVAL); |
| 306 | |
| 307 | DRM_COPY_FROM_USER_IOCTL(irqwait, argp, sizeof(irqwait)); |
| 308 | if (irqwait.request.irq >= dev_priv->num_irqs) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 309 | DRM_ERROR("%s Trying to wait on unknown irq %d\n", __FUNCTION__, |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 310 | irqwait.request.irq); |
| 311 | return DRM_ERR(EINVAL); |
| 312 | } |
| 313 | |
| 314 | cur_irq += irqwait.request.irq; |
| 315 | |
| 316 | switch (irqwait.request.type & ~VIA_IRQ_FLAGS_MASK) { |
| 317 | case VIA_IRQ_RELATIVE: |
| 318 | irqwait.request.sequence += atomic_read(&cur_irq->irq_received); |
| 319 | irqwait.request.type &= ~_DRM_VBLANK_RELATIVE; |
| 320 | case VIA_IRQ_ABSOLUTE: |
| 321 | break; |
| 322 | default: |
| 323 | return DRM_ERR(EINVAL); |
| 324 | } |
| 325 | |
| 326 | if (irqwait.request.type & VIA_IRQ_SIGNAL) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 327 | DRM_ERROR("%s Signals on Via IRQs not implemented yet.\n", |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 328 | __FUNCTION__); |
| 329 | return DRM_ERR(EINVAL); |
| 330 | } |
| 331 | |
| 332 | force_sequence = (irqwait.request.type & VIA_IRQ_FORCE_SEQUENCE); |
| 333 | |
| 334 | ret = via_driver_irq_wait(dev, irqwait.request.irq, force_sequence, |
| 335 | &irqwait.request.sequence); |
| 336 | do_gettimeofday(&now); |
| 337 | irqwait.reply.tval_sec = now.tv_sec; |
| 338 | irqwait.reply.tval_usec = now.tv_usec; |
| 339 | |
| 340 | DRM_COPY_TO_USER_IOCTL(argp, irqwait, sizeof(irqwait)); |
| 341 | |
| 342 | return ret; |
| 343 | } |