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mga_warp.c
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1 /* mga_warp.c -- Matrox G200/G400 WARP engine management -*- linux-c -*-
2  * Created: Thu Jan 11 21:29:32 2001 by [email protected]
3  *
4  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
5  * All Rights Reserved.
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a
8  * copy of this software and associated documentation files (the "Software"),
9  * to deal in the Software without restriction, including without limitation
10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11  * and/or sell copies of the Software, and to permit persons to whom the
12  * Software is furnished to do so, subject to the following conditions:
13  *
14  * The above copyright notice and this permission notice (including the next
15  * paragraph) shall be included in all copies or substantial portions of the
16  * Software.
17  *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24  * OTHER DEALINGS IN THE SOFTWARE.
25  *
26  * Authors:
27  * Gareth Hughes <[email protected]>
28  */
29 
30 #include <linux/firmware.h>
31 #include <linux/ihex.h>
32 #include <linux/platform_device.h>
33 #include <linux/module.h>
34 
35 #include <drm/drmP.h>
36 #include <drm/mga_drm.h>
37 #include "mga_drv.h"
38 
39 #define FIRMWARE_G200 "matrox/g200_warp.fw"
40 #define FIRMWARE_G400 "matrox/g400_warp.fw"
41 
44 
45 #define MGA_WARP_CODE_ALIGN 256 /* in bytes */
46 
47 #define WARP_UCODE_SIZE(size) ALIGN(size, MGA_WARP_CODE_ALIGN)
48 
50 {
51  unsigned char *vcbase = dev_priv->warp->handle;
52  unsigned long pcbase = dev_priv->warp->offset;
53  const char *firmware_name;
54  struct platform_device *pdev;
55  const struct firmware *fw = NULL;
56  const struct ihex_binrec *rec;
57  unsigned int size;
58  int n_pipes, where;
59  int rc = 0;
60 
61  switch (dev_priv->chipset) {
62  case MGA_CARD_TYPE_G400:
63  case MGA_CARD_TYPE_G550:
64  firmware_name = FIRMWARE_G400;
65  n_pipes = MGA_MAX_G400_PIPES;
66  break;
67  case MGA_CARD_TYPE_G200:
68  firmware_name = FIRMWARE_G200;
69  n_pipes = MGA_MAX_G200_PIPES;
70  break;
71  default:
72  return -EINVAL;
73  }
74 
75  pdev = platform_device_register_simple("mga_warp", 0, NULL, 0);
76  if (IS_ERR(pdev)) {
77  DRM_ERROR("mga: Failed to register microcode\n");
78  return PTR_ERR(pdev);
79  }
80  rc = request_ihex_firmware(&fw, firmware_name, &pdev->dev);
82  if (rc) {
83  DRM_ERROR("mga: Failed to load microcode \"%s\"\n",
84  firmware_name);
85  return rc;
86  }
87 
88  size = 0;
89  where = 0;
90  for (rec = (const struct ihex_binrec *)fw->data;
91  rec;
92  rec = ihex_next_binrec(rec)) {
93  size += WARP_UCODE_SIZE(be16_to_cpu(rec->len));
94  where++;
95  }
96 
97  if (where != n_pipes) {
98  DRM_ERROR("mga: Invalid microcode \"%s\"\n", firmware_name);
99  rc = -EINVAL;
100  goto out;
101  }
102  size = PAGE_ALIGN(size);
103  DRM_DEBUG("MGA ucode size = %d bytes\n", size);
104  if (size > dev_priv->warp->size) {
105  DRM_ERROR("microcode too large! (%u > %lu)\n",
106  size, dev_priv->warp->size);
107  rc = -ENOMEM;
108  goto out;
109  }
110 
111  memset(dev_priv->warp_pipe_phys, 0, sizeof(dev_priv->warp_pipe_phys));
112 
113  where = 0;
114  for (rec = (const struct ihex_binrec *)fw->data;
115  rec;
116  rec = ihex_next_binrec(rec)) {
117  unsigned int src_size, dst_size;
118 
119  DRM_DEBUG(" pcbase = 0x%08lx vcbase = %p\n", pcbase, vcbase);
120  dev_priv->warp_pipe_phys[where] = pcbase;
121  src_size = be16_to_cpu(rec->len);
122  dst_size = WARP_UCODE_SIZE(src_size);
123  memcpy(vcbase, rec->data, src_size);
124  pcbase += dst_size;
125  vcbase += dst_size;
126  where++;
127  }
128 
129 out:
130  release_firmware(fw);
131  return rc;
132 }
133 
134 #define WMISC_EXPECTED (MGA_WUCODECACHE_ENABLE | MGA_WMASTER_ENABLE)
135 
137 {
138  u32 wmisc;
139 
140  /* FIXME: Get rid of these damned magic numbers...
141  */
142  switch (dev_priv->chipset) {
143  case MGA_CARD_TYPE_G400:
144  case MGA_CARD_TYPE_G550:
146  MGA_WRITE(MGA_WGETMSB, 0x00000E00);
147  MGA_WRITE(MGA_WVRTXSZ, 0x00001807);
148  MGA_WRITE(MGA_WACCEPTSEQ, 0x18000000);
149  break;
150  case MGA_CARD_TYPE_G200:
152  MGA_WRITE(MGA_WGETMSB, 0x1606);
154  break;
155  default:
156  return -EINVAL;
157  }
158 
161  wmisc = MGA_READ(MGA_WMISC);
162  if (wmisc != WMISC_EXPECTED) {
163  DRM_ERROR("WARP engine config failed! 0x%x != 0x%x\n",
164  wmisc, WMISC_EXPECTED);
165  return -EINVAL;
166  }
167 
168  return 0;
169 }