diff options
Diffstat (limited to 'sound/pci/ctxfi/ctresource.c')
| -rw-r--r-- | sound/pci/ctxfi/ctresource.c | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/sound/pci/ctxfi/ctresource.c b/sound/pci/ctxfi/ctresource.c new file mode 100644 index 000000000..f05a09ed4 --- /dev/null +++ b/sound/pci/ctxfi/ctresource.c @@ -0,0 +1,293 @@ +/** + * 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 void 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); +} + +static void rsc_master(struct rsc *rsc) +{ + rsc->conj = rsc->idx; +} + +static const 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, struct hw *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 (!hw) { + rsc->ctrl_blk = NULL; + return 0; + } + + switch (type) { + case SRC: + err = hw->src_rsc_get_ctrl_blk(&rsc->ctrl_blk); + break; + case AMIXER: + err = hw->amixer_rsc_get_ctrl_blk(&rsc->ctrl_blk); + break; + case SRCIMP: + case SUM: + case DAIO: + break; + default: + dev_err(((struct hw *)hw)->card->dev, + "Invalid resource type value %d!\n", type); + return -EINVAL; + } + + if (err) { + dev_err(((struct hw *)hw)->card->dev, + "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: + rsc->hw->src_rsc_put_ctrl_blk(rsc->ctrl_blk); + break; + case AMIXER: + rsc->hw->amixer_rsc_put_ctrl_blk(rsc->ctrl_blk); + break; + case SUM: + case DAIO: + break; + default: + dev_err(((struct hw *)rsc->hw)->card->dev, + "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, struct hw *hw) +{ + int err = 0; + + mgr->type = NUM_RSCTYP; + + mgr->rscs = kzalloc(((amount + 8 - 1) / 8), GFP_KERNEL); + if (!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: + dev_err(hw->card->dev, + "Invalid resource type value %d!\n", type); + err = -EINVAL; + goto error; + } + + if (err) { + dev_err(hw->card->dev, + "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) +{ + kfree(mgr->rscs); + mgr->rscs = NULL; + + if ((NULL != mgr->hw) && (NULL != mgr->ctrl_blk)) { + switch (mgr->type) { + case SRC: + mgr->hw->src_mgr_put_ctrl_blk(mgr->ctrl_blk); + break; + case SRCIMP: + mgr->hw->srcimp_mgr_put_ctrl_blk(mgr->ctrl_blk); + break; + case AMIXER: + mgr->hw->amixer_mgr_put_ctrl_blk(mgr->ctrl_blk); + break; + case DAIO: + mgr->hw->daio_mgr_put_ctrl_blk(mgr->ctrl_blk); + break; + case SUM: + break; + default: + dev_err(((struct hw *)mgr->hw)->card->dev, + "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; +} |