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87 lines
2.3 KiB
87 lines
2.3 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (c) by Jaroslav Kysela <[email protected]> |
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* GUS's memory access via proc filesystem |
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*/ |
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#include <linux/slab.h> |
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#include <sound/core.h> |
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#include <sound/gus.h> |
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#include <sound/info.h> |
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struct gus_proc_private { |
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int rom; /* data are in ROM */ |
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unsigned int address; |
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unsigned int size; |
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struct snd_gus_card * gus; |
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}; |
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static ssize_t snd_gf1_mem_proc_dump(struct snd_info_entry *entry, |
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void *file_private_data, |
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struct file *file, char __user *buf, |
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size_t count, loff_t pos) |
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{ |
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struct gus_proc_private *priv = entry->private_data; |
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struct snd_gus_card *gus = priv->gus; |
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int err; |
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err = snd_gus_dram_read(gus, buf, pos, count, priv->rom); |
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if (err < 0) |
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return err; |
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return count; |
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} |
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static void snd_gf1_mem_proc_free(struct snd_info_entry *entry) |
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{ |
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struct gus_proc_private *priv = entry->private_data; |
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kfree(priv); |
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} |
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static const struct snd_info_entry_ops snd_gf1_mem_proc_ops = { |
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.read = snd_gf1_mem_proc_dump, |
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}; |
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int snd_gf1_mem_proc_init(struct snd_gus_card * gus) |
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{ |
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int idx; |
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char name[16]; |
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struct gus_proc_private *priv; |
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struct snd_info_entry *entry; |
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for (idx = 0; idx < 4; idx++) { |
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if (gus->gf1.mem_alloc.banks_8[idx].size > 0) { |
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priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
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if (priv == NULL) |
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return -ENOMEM; |
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priv->gus = gus; |
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sprintf(name, "gus-ram-%i", idx); |
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if (! snd_card_proc_new(gus->card, name, &entry)) { |
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entry->content = SNDRV_INFO_CONTENT_DATA; |
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entry->private_data = priv; |
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entry->private_free = snd_gf1_mem_proc_free; |
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entry->c.ops = &snd_gf1_mem_proc_ops; |
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priv->address = gus->gf1.mem_alloc.banks_8[idx].address; |
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priv->size = entry->size = gus->gf1.mem_alloc.banks_8[idx].size; |
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} |
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} |
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} |
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for (idx = 0; idx < 4; idx++) { |
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if (gus->gf1.rom_present & (1 << idx)) { |
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priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
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if (priv == NULL) |
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return -ENOMEM; |
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priv->rom = 1; |
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priv->gus = gus; |
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sprintf(name, "gus-rom-%i", idx); |
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if (! snd_card_proc_new(gus->card, name, &entry)) { |
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entry->content = SNDRV_INFO_CONTENT_DATA; |
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entry->private_data = priv; |
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entry->private_free = snd_gf1_mem_proc_free; |
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entry->c.ops = &snd_gf1_mem_proc_ops; |
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priv->address = idx * 4096 * 1024; |
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priv->size = entry->size = gus->gf1.rom_memory; |
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} |
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} |
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} |
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return 0; |
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}
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