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-rw-r--r--sound/pci/ctxfi/ctresource.c301
1 files changed, 301 insertions, 0 deletions
diff --git a/sound/pci/ctxfi/ctresource.c b/sound/pci/ctxfi/ctresource.c
new file mode 100644
index 0000000..889c495
--- /dev/null
+++ b/sound/pci/ctxfi/ctresource.c
@@ -0,0 +1,301 @@
+/**
+ * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
+ *
+ * This source file is released under GPL v2 license (no other versions).
+ * See the COPYING file included in the main directory of this source
+ * distribution for the license terms and conditions.
+ *
+ * @File ctresource.c
+ *
+ * @Brief
+ * This file contains the implementation of some generic helper functions.
+ *
+ * @Author Liu Chun
+ * @Date May 15 2008
+ *
+ */
+
+#include "ctresource.h"
+#include "cthardware.h"
+#include <linux/err.h>
+#include <linux/slab.h>
+
+#define AUDIO_SLOT_BLOCK_NUM 256
+
+/* Resource allocation based on bit-map management mechanism */
+static int
+get_resource(u8 *rscs, unsigned int amount,
+ unsigned int multi, unsigned int *ridx)
+{
+ int i, j, k, n;
+
+ /* Check whether there are sufficient resources to meet request. */
+ for (i = 0, n = multi; i < amount; i++) {
+ j = i / 8;
+ k = i % 8;
+ if (rscs[j] & ((u8)1 << k)) {
+ n = multi;
+ continue;
+ }
+ if (!(--n))
+ break; /* found sufficient contiguous resources */
+ }
+
+ if (i >= amount) {
+ /* Can not find sufficient contiguous resources */
+ return -ENOENT;
+ }
+
+ /* Mark the contiguous bits in resource bit-map as used */
+ for (n = multi; n > 0; n--) {
+ j = i / 8;
+ k = i % 8;
+ rscs[j] |= ((u8)1 << k);
+ i--;
+ }
+
+ *ridx = i + 1;
+
+ return 0;
+}
+
+static int put_resource(u8 *rscs, unsigned int multi, unsigned int idx)
+{
+ unsigned int i, j, k, n;
+
+ /* Mark the contiguous bits in resource bit-map as used */
+ for (n = multi, i = idx; n > 0; n--) {
+ j = i / 8;
+ k = i % 8;
+ rscs[j] &= ~((u8)1 << k);
+ i++;
+ }
+
+ return 0;
+}
+
+int mgr_get_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int *ridx)
+{
+ int err;
+
+ if (n > mgr->avail)
+ return -ENOENT;
+
+ err = get_resource(mgr->rscs, mgr->amount, n, ridx);
+ if (!err)
+ mgr->avail -= n;
+
+ return err;
+}
+
+int mgr_put_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int idx)
+{
+ put_resource(mgr->rscs, n, idx);
+ mgr->avail += n;
+
+ return 0;
+}
+
+static unsigned char offset_in_audio_slot_block[NUM_RSCTYP] = {
+ /* SRC channel is at Audio Ring slot 1 every 16 slots. */
+ [SRC] = 0x1,
+ [AMIXER] = 0x4,
+ [SUM] = 0xc,
+};
+
+static int rsc_index(const struct rsc *rsc)
+{
+ return rsc->conj;
+}
+
+static int audio_ring_slot(const struct rsc *rsc)
+{
+ return (rsc->conj << 4) + offset_in_audio_slot_block[rsc->type];
+}
+
+static int rsc_next_conj(struct rsc *rsc)
+{
+ unsigned int i;
+ for (i = 0; (i < 8) && (!(rsc->msr & (0x1 << i))); )
+ i++;
+ rsc->conj += (AUDIO_SLOT_BLOCK_NUM >> i);
+ return rsc->conj;
+}
+
+static int rsc_master(struct rsc *rsc)
+{
+ return rsc->conj = rsc->idx;
+}
+
+static struct rsc_ops rsc_generic_ops = {
+ .index = rsc_index,
+ .output_slot = audio_ring_slot,
+ .master = rsc_master,
+ .next_conj = rsc_next_conj,
+};
+
+int rsc_init(struct rsc *rsc, u32 idx, enum RSCTYP type, u32 msr, void *hw)
+{
+ int err = 0;
+
+ rsc->idx = idx;
+ rsc->conj = idx;
+ rsc->type = type;
+ rsc->msr = msr;
+ rsc->hw = hw;
+ rsc->ops = &rsc_generic_ops;
+ if (NULL == hw) {
+ rsc->ctrl_blk = NULL;
+ return 0;
+ }
+
+ switch (type) {
+ case SRC:
+ err = ((struct hw *)hw)->src_rsc_get_ctrl_blk(&rsc->ctrl_blk);
+ break;
+ case AMIXER:
+ err = ((struct hw *)hw)->
+ amixer_rsc_get_ctrl_blk(&rsc->ctrl_blk);
+ break;
+ case SRCIMP:
+ case SUM:
+ case DAIO:
+ break;
+ default:
+ printk(KERN_ERR
+ "ctxfi: Invalid resource type value %d!\n", type);
+ return -EINVAL;
+ }
+
+ if (err) {
+ printk(KERN_ERR
+ "ctxfi: Failed to get resource control block!\n");
+ return err;
+ }
+
+ return 0;
+}
+
+int rsc_uninit(struct rsc *rsc)
+{
+ if ((NULL != rsc->hw) && (NULL != rsc->ctrl_blk)) {
+ switch (rsc->type) {
+ case SRC:
+ ((struct hw *)rsc->hw)->
+ src_rsc_put_ctrl_blk(rsc->ctrl_blk);
+ break;
+ case AMIXER:
+ ((struct hw *)rsc->hw)->
+ amixer_rsc_put_ctrl_blk(rsc->ctrl_blk);
+ break;
+ case SUM:
+ case DAIO:
+ break;
+ default:
+ printk(KERN_ERR "ctxfi: "
+ "Invalid resource type value %d!\n", rsc->type);
+ break;
+ }
+
+ rsc->hw = rsc->ctrl_blk = NULL;
+ }
+
+ rsc->idx = rsc->conj = 0;
+ rsc->type = NUM_RSCTYP;
+ rsc->msr = 0;
+
+ return 0;
+}
+
+int rsc_mgr_init(struct rsc_mgr *mgr, enum RSCTYP type,
+ unsigned int amount, void *hw_obj)
+{
+ int err = 0;
+ struct hw *hw = hw_obj;
+
+ mgr->type = NUM_RSCTYP;
+
+ mgr->rscs = kzalloc(((amount + 8 - 1) / 8), GFP_KERNEL);
+ if (NULL == mgr->rscs)
+ return -ENOMEM;
+
+ switch (type) {
+ case SRC:
+ err = hw->src_mgr_get_ctrl_blk(&mgr->ctrl_blk);
+ break;
+ case SRCIMP:
+ err = hw->srcimp_mgr_get_ctrl_blk(&mgr->ctrl_blk);
+ break;
+ case AMIXER:
+ err = hw->amixer_mgr_get_ctrl_blk(&mgr->ctrl_blk);
+ break;
+ case DAIO:
+ err = hw->daio_mgr_get_ctrl_blk(hw, &mgr->ctrl_blk);
+ break;
+ case SUM:
+ break;
+ default:
+ printk(KERN_ERR
+ "ctxfi: Invalid resource type value %d!\n", type);
+ err = -EINVAL;
+ goto error;
+ }
+
+ if (err) {
+ printk(KERN_ERR
+ "ctxfi: Failed to get manager control block!\n");
+ goto error;
+ }
+
+ mgr->type = type;
+ mgr->avail = mgr->amount = amount;
+ mgr->hw = hw;
+
+ return 0;
+
+error:
+ kfree(mgr->rscs);
+ return err;
+}
+
+int rsc_mgr_uninit(struct rsc_mgr *mgr)
+{
+ if (NULL != mgr->rscs) {
+ kfree(mgr->rscs);
+ mgr->rscs = NULL;
+ }
+
+ if ((NULL != mgr->hw) && (NULL != mgr->ctrl_blk)) {
+ switch (mgr->type) {
+ case SRC:
+ ((struct hw *)mgr->hw)->
+ src_mgr_put_ctrl_blk(mgr->ctrl_blk);
+ break;
+ case SRCIMP:
+ ((struct hw *)mgr->hw)->
+ srcimp_mgr_put_ctrl_blk(mgr->ctrl_blk);
+ break;
+ case AMIXER:
+ ((struct hw *)mgr->hw)->
+ amixer_mgr_put_ctrl_blk(mgr->ctrl_blk);
+ break;
+ case DAIO:
+ ((struct hw *)mgr->hw)->
+ daio_mgr_put_ctrl_blk(mgr->ctrl_blk);
+ break;
+ case SUM:
+ break;
+ default:
+ printk(KERN_ERR "ctxfi: "
+ "Invalid resource type value %d!\n", mgr->type);
+ break;
+ }
+
+ mgr->hw = mgr->ctrl_blk = NULL;
+ }
+
+ mgr->type = NUM_RSCTYP;
+ mgr->avail = mgr->amount = 0;
+
+ return 0;
+}
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