/* * Wireless Host Controller (WHC) initialization. * * Copyright (C) 2007 Cambridge Silicon Radio Ltd. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version * 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include #include #include #include #include "../../wusbcore/wusbhc.h" #include "whcd.h" /* * Reset the host controller. */ static void whc_hw_reset(struct whc *whc) { le_writel(WUSBCMD_WHCRESET, whc->base + WUSBCMD); whci_wait_for(&whc->umc->dev, whc->base + WUSBCMD, WUSBCMD_WHCRESET, 0, 100, "reset"); } static void whc_hw_init_di_buf(struct whc *whc) { int d; /* Disable all entries in the Device Information buffer. */ for (d = 0; d < whc->n_devices; d++) whc->di_buf[d].addr_sec_info = WHC_DI_DISABLE; le_writeq(whc->di_buf_dma, whc->base + WUSBDEVICEINFOADDR); } static void whc_hw_init_dn_buf(struct whc *whc) { /* Clear the Device Notification buffer to ensure the V (valid) * bits are clear. */ memset(whc->dn_buf, 0, 4096); le_writeq(whc->dn_buf_dma, whc->base + WUSBDNTSBUFADDR); } int whc_init(struct whc *whc) { u32 whcsparams; int ret, i; resource_size_t start, len; spin_lock_init(&whc->lock); mutex_init(&whc->mutex); init_waitqueue_head(&whc->cmd_wq); init_waitqueue_head(&whc->async_list_wq); init_waitqueue_head(&whc->periodic_list_wq); whc->workqueue = alloc_ordered_workqueue(dev_name(&whc->umc->dev), 0); if (whc->workqueue == NULL) { ret = -ENOMEM; goto error; } INIT_WORK(&whc->dn_work, whc_dn_work); INIT_WORK(&whc->async_work, scan_async_work); INIT_LIST_HEAD(&whc->async_list); INIT_LIST_HEAD(&whc->async_removed_list); INIT_WORK(&whc->periodic_work, scan_periodic_work); for (i = 0; i < 5; i++) INIT_LIST_HEAD(&whc->periodic_list[i]); INIT_LIST_HEAD(&whc->periodic_removed_list); /* Map HC registers. */ start = whc->umc->resource.start; len = whc->umc->resource.end - start + 1; if (!request_mem_region(start, len, "whci-hc")) { dev_err(&whc->umc->dev, "can't request HC region\n"); ret = -EBUSY; goto error; } whc->base_phys = start; whc->base = ioremap(start, len); if (!whc->base) { dev_err(&whc->umc->dev, "ioremap\n"); ret = -ENOMEM; goto error; } whc_hw_reset(whc); /* Read maximum number of devices, keys and MMC IEs. */ whcsparams = le_readl(whc->base + WHCSPARAMS); whc->n_devices = WHCSPARAMS_TO_N_DEVICES(whcsparams); whc->n_keys = WHCSPARAMS_TO_N_KEYS(whcsparams); whc->n_mmc_ies = WHCSPARAMS_TO_N_MMC_IES(whcsparams); dev_dbg(&whc->umc->dev, "N_DEVICES = %d, N_KEYS = %d, N_MMC_IES = %d\n", whc->n_devices, whc->n_keys, whc->n_mmc_ies); whc->qset_pool = dma_pool_create("qset", &whc->umc->dev, sizeof(struct whc_qset), 64, 0); if (whc->qset_pool == NULL) { ret = -ENOMEM; goto error; } ret = asl_init(whc); if (ret < 0) goto error; ret = pzl_init(whc); if (ret < 0) goto error; /* Allocate and initialize a buffer for generic commands, the Device Information buffer, and the Device Notification buffer. */ whc->gen_cmd_buf = dma_alloc_coherent(&whc->umc->dev, WHC_GEN_CMD_DATA_LEN, &whc->gen_cmd_buf_dma, GFP_KERNEL); if (whc->gen_cmd_buf == NULL) { ret = -ENOMEM; goto error; } whc->dn_buf = dma_alloc_coherent(&whc->umc->dev, sizeof(struct dn_buf_entry) * WHC_N_DN_ENTRIES, &whc->dn_buf_dma, GFP_KERNEL); if (!whc->dn_buf) { ret = -ENOMEM; goto error; } whc_hw_init_dn_buf(whc); whc->di_buf = dma_alloc_coherent(&whc->umc->dev, sizeof(struct di_buf_entry) * whc->n_devices, &whc->di_buf_dma, GFP_KERNEL); if (!whc->di_buf) { ret = -ENOMEM; goto error; } whc_hw_init_di_buf(whc); return 0; error: whc_clean_up(whc); return ret; } void whc_clean_up(struct whc *whc) { resource_size_t len; if (whc->di_buf) dma_free_coherent(&whc->umc->dev, sizeof(struct di_buf_entry) * whc->n_devices, whc->di_buf, whc->di_buf_dma); if (whc->dn_buf) dma_free_coherent(&whc->umc->dev, sizeof(struct dn_buf_entry) * WHC_N_DN_ENTRIES, whc->dn_buf, whc->dn_buf_dma); if (whc->gen_cmd_buf) dma_free_coherent(&whc->umc->dev, WHC_GEN_CMD_DATA_LEN, whc->gen_cmd_buf, whc->gen_cmd_buf_dma); pzl_clean_up(whc); asl_clean_up(whc); dma_pool_destroy(whc->qset_pool); len = resource_size(&whc->umc->resource); if (whc->base) iounmap(whc->base); if (whc->base_phys) release_mem_region(whc->base_phys, len); if (whc->workqueue) destroy_workqueue(whc->workqueue); } .git/tree/sound?id=238d1d0f79f619d75c2cc741d6770fb0986aef24'>sound parentf3de082c12e5e9ff43c58a7561f6ec3272d03a48 (diff)parent36f671be1db1b17d3d4ab0c8b47f81ccb1efcb75 (diff)
Merge tag 'docs-4.10-rc1-fix' of git://git.lwn.net/linux
Pull documentation fixes from Jonathan Corbet: "Two small fixes: - A merge error on my part broke the DocBook build. I've requisitioned one of tglx's frozen sharks for appropriate disciplinary action and resolved to be more careful about testing the DocBook stuff as long as it's still around. - Fix an error in unaligned-memory-access.txt" * tag 'docs-4.10-rc1-fix' of git://git.lwn.net/linux: Documentation/unaligned-memory-access.txt: fix incorrect comparison operator docs: Fix build failure
Diffstat (limited to 'sound')