1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * GUS's memory access via proc filesystem 5 */ 6 7 #include <linux/slab.h> 8 #include <sound/core.h> 9 #include <sound/gus.h> 10 #include <sound/info.h> 11 12 struct gus_proc_private { 13 int rom; /* data are in ROM */ 14 unsigned int address; 15 unsigned int size; 16 struct snd_gus_card * gus; 17 }; 18 19 static ssize_t snd_gf1_mem_proc_dump(struct snd_info_entry *entry, 20 void *file_private_data, 21 struct file *file, char __user *buf, 22 size_t count, loff_t pos) 23 { 24 struct gus_proc_private *priv = entry->private_data; 25 struct snd_gus_card *gus = priv->gus; 26 int err; 27 28 err = snd_gus_dram_read(gus, buf, pos, count, priv->rom); 29 if (err < 0) 30 return err; 31 return count; 32 } 33 34 static void snd_gf1_mem_proc_free(struct snd_info_entry *entry) 35 { 36 struct gus_proc_private *priv = entry->private_data; 37 kfree(priv); 38 } 39 40 static const struct snd_info_entry_ops snd_gf1_mem_proc_ops = { 41 .read = snd_gf1_mem_proc_dump, 42 }; 43 44 int snd_gf1_mem_proc_init(struct snd_gus_card * gus) 45 { 46 int idx; 47 char name[16]; 48 struct gus_proc_private *priv; 49 struct snd_info_entry *entry; 50 51 for (idx = 0; idx < 4; idx++) { 52 if (gus->gf1.mem_alloc.banks_8[idx].size > 0) { 53 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 54 if (priv == NULL) 55 return -ENOMEM; 56 priv->gus = gus; 57 sprintf(name, "gus-ram-%i", idx); 58 if (! snd_card_proc_new(gus->card, name, &entry)) { 59 entry->content = SNDRV_INFO_CONTENT_DATA; 60 entry->private_data = priv; 61 entry->private_free = snd_gf1_mem_proc_free; 62 entry->c.ops = &snd_gf1_mem_proc_ops; 63 priv->address = gus->gf1.mem_alloc.banks_8[idx].address; 64 priv->size = entry->size = gus->gf1.mem_alloc.banks_8[idx].size; 65 } 66 } 67 } 68 for (idx = 0; idx < 4; idx++) { 69 if (gus->gf1.rom_present & (1 << idx)) { 70 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 71 if (priv == NULL) 72 return -ENOMEM; 73 priv->rom = 1; 74 priv->gus = gus; 75 sprintf(name, "gus-rom-%i", idx); 76 if (! snd_card_proc_new(gus->card, name, &entry)) { 77 entry->content = SNDRV_INFO_CONTENT_DATA; 78 entry->private_data = priv; 79 entry->private_free = snd_gf1_mem_proc_free; 80 entry->c.ops = &snd_gf1_mem_proc_ops; 81 priv->address = idx * 4096 * 1024; 82 priv->size = entry->size = gus->gf1.rom_memory; 83 } 84 } 85 } 86 return 0; 87 } 88