Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | /* * Copyright (c) by Jaroslav Kysela <perex@suse.cz> * GUS's memory access via proc filesystem * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include <sound/driver.h> #include <linux/slab.h> #include <sound/core.h> #include <sound/gus.h> #include <sound/info.h> struct gus_proc_private { int rom; /* data are in ROM */ unsigned int address; unsigned int size; struct snd_gus_card * gus; }; static long snd_gf1_mem_proc_dump(struct snd_info_entry *entry, void *file_private_data, struct file *file, char __user *buf, unsigned long count, unsigned long pos) { long size; struct gus_proc_private *priv = entry->private_data; struct snd_gus_card *gus = priv->gus; int err; size = count; if (pos + size > priv->size) size = (long)priv->size - pos; if (size > 0) { if ((err = snd_gus_dram_read(gus, buf, pos, size, priv->rom)) < 0) return err; return size; } return 0; } static long long snd_gf1_mem_proc_llseek(struct snd_info_entry *entry, void *private_file_data, struct file *file, long long offset, int orig) { struct gus_proc_private *priv = entry->private_data; switch (orig) { case SEEK_SET: file->f_pos = offset; break; case SEEK_CUR: file->f_pos += offset; break; case SEEK_END: /* offset is negative */ file->f_pos = priv->size + offset; break; default: return -EINVAL; } if (file->f_pos > priv->size) file->f_pos = priv->size; return file->f_pos; } static void snd_gf1_mem_proc_free(struct snd_info_entry *entry) { struct gus_proc_private *priv = entry->private_data; kfree(priv); } static struct snd_info_entry_ops snd_gf1_mem_proc_ops = { .read = snd_gf1_mem_proc_dump, .llseek = snd_gf1_mem_proc_llseek, }; int snd_gf1_mem_proc_init(struct snd_gus_card * gus) { int idx; char name[16]; struct gus_proc_private *priv; struct snd_info_entry *entry; for (idx = 0; idx < 4; idx++) { if (gus->gf1.mem_alloc.banks_8[idx].size > 0) { priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (priv == NULL) return -ENOMEM; priv->gus = gus; sprintf(name, "gus-ram-%i", idx); if (! snd_card_proc_new(gus->card, name, &entry)) { entry->content = SNDRV_INFO_CONTENT_DATA; entry->private_data = priv; entry->private_free = snd_gf1_mem_proc_free; entry->c.ops = &snd_gf1_mem_proc_ops; priv->address = gus->gf1.mem_alloc.banks_8[idx].address; priv->size = entry->size = gus->gf1.mem_alloc.banks_8[idx].size; } } } for (idx = 0; idx < 4; idx++) { if (gus->gf1.rom_present & (1 << idx)) { priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (priv == NULL) return -ENOMEM; priv->rom = 1; priv->gus = gus; sprintf(name, "gus-rom-%i", idx); if (! snd_card_proc_new(gus->card, name, &entry)) { entry->content = SNDRV_INFO_CONTENT_DATA; entry->private_data = priv; entry->private_free = snd_gf1_mem_proc_free; entry->c.ops = &snd_gf1_mem_proc_ops; priv->address = idx * 4096 * 1024; priv->size = entry->size = gus->gf1.rom_memory; } } } return 0; } |