Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 2 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * GUS's memory access via proc filesystem |
| 4 | * |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | * |
| 20 | */ |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/slab.h> |
| 23 | #include <sound/core.h> |
| 24 | #include <sound/gus.h> |
| 25 | #include <sound/info.h> |
| 26 | |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 27 | struct gus_proc_private { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | int rom; /* data are in ROM */ |
| 29 | unsigned int address; |
| 30 | unsigned int size; |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 31 | struct snd_gus_card * gus; |
| 32 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Takashi Iwai | 24e4a12 | 2010-04-13 11:22:01 +0200 | [diff] [blame] | 34 | static ssize_t snd_gf1_mem_proc_dump(struct snd_info_entry *entry, |
| 35 | void *file_private_data, |
| 36 | struct file *file, char __user *buf, |
| 37 | size_t count, loff_t pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | { |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 39 | struct gus_proc_private *priv = entry->private_data; |
| 40 | struct snd_gus_card *gus = priv->gus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | int err; |
| 42 | |
Takashi Iwai | d97e1b7 | 2010-04-13 11:33:54 +0200 | [diff] [blame^] | 43 | err = snd_gus_dram_read(gus, buf, pos, count, priv->rom); |
| 44 | if (err < 0) |
| 45 | return err; |
| 46 | return count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | } |
| 48 | |
Takashi Iwai | 24e4a12 | 2010-04-13 11:22:01 +0200 | [diff] [blame] | 49 | static loff_t snd_gf1_mem_proc_llseek(struct snd_info_entry *entry, |
| 50 | void *private_file_data, |
| 51 | struct file *file, |
| 52 | loff_t offset, int orig) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | { |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 54 | struct gus_proc_private *priv = entry->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | switch (orig) { |
Josef 'Jeff' Sipek | d158da8 | 2006-09-21 11:33:14 +0200 | [diff] [blame] | 57 | case SEEK_SET: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | file->f_pos = offset; |
| 59 | break; |
Josef 'Jeff' Sipek | d158da8 | 2006-09-21 11:33:14 +0200 | [diff] [blame] | 60 | case SEEK_CUR: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | file->f_pos += offset; |
| 62 | break; |
Josef 'Jeff' Sipek | d158da8 | 2006-09-21 11:33:14 +0200 | [diff] [blame] | 63 | case SEEK_END: /* offset is negative */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | file->f_pos = priv->size + offset; |
| 65 | break; |
| 66 | default: |
| 67 | return -EINVAL; |
| 68 | } |
| 69 | if (file->f_pos > priv->size) |
| 70 | file->f_pos = priv->size; |
| 71 | return file->f_pos; |
| 72 | } |
| 73 | |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 74 | static void snd_gf1_mem_proc_free(struct snd_info_entry *entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | { |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 76 | struct gus_proc_private *priv = entry->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | kfree(priv); |
| 78 | } |
| 79 | |
| 80 | static struct snd_info_entry_ops snd_gf1_mem_proc_ops = { |
| 81 | .read = snd_gf1_mem_proc_dump, |
| 82 | .llseek = snd_gf1_mem_proc_llseek, |
| 83 | }; |
| 84 | |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 85 | int snd_gf1_mem_proc_init(struct snd_gus_card * gus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | { |
| 87 | int idx; |
| 88 | char name[16]; |
Takashi Iwai | 5e2da20 | 2005-11-17 14:36:44 +0100 | [diff] [blame] | 89 | struct gus_proc_private *priv; |
| 90 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | for (idx = 0; idx < 4; idx++) { |
| 93 | if (gus->gf1.mem_alloc.banks_8[idx].size > 0) { |
Takashi Iwai | 9e76a76 | 2005-09-09 14:21:17 +0200 | [diff] [blame] | 94 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | if (priv == NULL) |
| 96 | return -ENOMEM; |
| 97 | priv->gus = gus; |
| 98 | sprintf(name, "gus-ram-%i", idx); |
| 99 | if (! snd_card_proc_new(gus->card, name, &entry)) { |
| 100 | entry->content = SNDRV_INFO_CONTENT_DATA; |
| 101 | entry->private_data = priv; |
| 102 | entry->private_free = snd_gf1_mem_proc_free; |
| 103 | entry->c.ops = &snd_gf1_mem_proc_ops; |
| 104 | priv->address = gus->gf1.mem_alloc.banks_8[idx].address; |
| 105 | priv->size = entry->size = gus->gf1.mem_alloc.banks_8[idx].size; |
| 106 | } |
| 107 | } |
| 108 | } |
| 109 | for (idx = 0; idx < 4; idx++) { |
| 110 | if (gus->gf1.rom_present & (1 << idx)) { |
Takashi Iwai | 9e76a76 | 2005-09-09 14:21:17 +0200 | [diff] [blame] | 111 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | if (priv == NULL) |
| 113 | return -ENOMEM; |
| 114 | priv->rom = 1; |
| 115 | priv->gus = gus; |
| 116 | sprintf(name, "gus-rom-%i", idx); |
| 117 | if (! snd_card_proc_new(gus->card, name, &entry)) { |
| 118 | entry->content = SNDRV_INFO_CONTENT_DATA; |
| 119 | entry->private_data = priv; |
| 120 | entry->private_free = snd_gf1_mem_proc_free; |
| 121 | entry->c.ops = &snd_gf1_mem_proc_ops; |
| 122 | priv->address = idx * 4096 * 1024; |
| 123 | priv->size = entry->size = gus->gf1.rom_memory; |
| 124 | } |
| 125 | } |
| 126 | } |
| 127 | return 0; |
| 128 | } |