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28f65c11f2
Several fixes as well where the +1 was missing. Done via coccinelle scripts like: @@ struct resource *ptr; @@ - ptr->end - ptr->start + 1 + resource_size(ptr) and some grep and typing. Mostly uncompiled, no cross-compilers. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
190 lines
4.9 KiB
C
190 lines
4.9 KiB
C
/*
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* Wireless Host Controller (WHC) initialization.
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*
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* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/kernel.h>
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#include <linux/gfp.h>
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#include <linux/dma-mapping.h>
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#include <linux/uwb/umc.h>
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#include "../../wusbcore/wusbhc.h"
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#include "whcd.h"
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/*
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* Reset the host controller.
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*/
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static void whc_hw_reset(struct whc *whc)
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{
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le_writel(WUSBCMD_WHCRESET, whc->base + WUSBCMD);
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whci_wait_for(&whc->umc->dev, whc->base + WUSBCMD, WUSBCMD_WHCRESET, 0,
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100, "reset");
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}
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static void whc_hw_init_di_buf(struct whc *whc)
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{
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int d;
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/* Disable all entries in the Device Information buffer. */
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for (d = 0; d < whc->n_devices; d++)
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whc->di_buf[d].addr_sec_info = WHC_DI_DISABLE;
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le_writeq(whc->di_buf_dma, whc->base + WUSBDEVICEINFOADDR);
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}
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static void whc_hw_init_dn_buf(struct whc *whc)
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{
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/* Clear the Device Notification buffer to ensure the V (valid)
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* bits are clear. */
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memset(whc->dn_buf, 0, 4096);
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le_writeq(whc->dn_buf_dma, whc->base + WUSBDNTSBUFADDR);
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}
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int whc_init(struct whc *whc)
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{
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u32 whcsparams;
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int ret, i;
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resource_size_t start, len;
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spin_lock_init(&whc->lock);
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mutex_init(&whc->mutex);
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init_waitqueue_head(&whc->cmd_wq);
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init_waitqueue_head(&whc->async_list_wq);
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init_waitqueue_head(&whc->periodic_list_wq);
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whc->workqueue = create_singlethread_workqueue(dev_name(&whc->umc->dev));
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if (whc->workqueue == NULL) {
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ret = -ENOMEM;
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goto error;
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}
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INIT_WORK(&whc->dn_work, whc_dn_work);
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INIT_WORK(&whc->async_work, scan_async_work);
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INIT_LIST_HEAD(&whc->async_list);
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INIT_LIST_HEAD(&whc->async_removed_list);
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INIT_WORK(&whc->periodic_work, scan_periodic_work);
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for (i = 0; i < 5; i++)
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INIT_LIST_HEAD(&whc->periodic_list[i]);
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INIT_LIST_HEAD(&whc->periodic_removed_list);
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/* Map HC registers. */
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start = whc->umc->resource.start;
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len = whc->umc->resource.end - start + 1;
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if (!request_mem_region(start, len, "whci-hc")) {
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dev_err(&whc->umc->dev, "can't request HC region\n");
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ret = -EBUSY;
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goto error;
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}
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whc->base_phys = start;
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whc->base = ioremap(start, len);
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if (!whc->base) {
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dev_err(&whc->umc->dev, "ioremap\n");
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ret = -ENOMEM;
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goto error;
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}
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whc_hw_reset(whc);
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/* Read maximum number of devices, keys and MMC IEs. */
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whcsparams = le_readl(whc->base + WHCSPARAMS);
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whc->n_devices = WHCSPARAMS_TO_N_DEVICES(whcsparams);
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whc->n_keys = WHCSPARAMS_TO_N_KEYS(whcsparams);
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whc->n_mmc_ies = WHCSPARAMS_TO_N_MMC_IES(whcsparams);
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dev_dbg(&whc->umc->dev, "N_DEVICES = %d, N_KEYS = %d, N_MMC_IES = %d\n",
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whc->n_devices, whc->n_keys, whc->n_mmc_ies);
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whc->qset_pool = dma_pool_create("qset", &whc->umc->dev,
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sizeof(struct whc_qset), 64, 0);
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if (whc->qset_pool == NULL) {
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ret = -ENOMEM;
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goto error;
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}
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ret = asl_init(whc);
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if (ret < 0)
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goto error;
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ret = pzl_init(whc);
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if (ret < 0)
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goto error;
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/* Allocate and initialize a buffer for generic commands, the
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Device Information buffer, and the Device Notification
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buffer. */
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whc->gen_cmd_buf = dma_alloc_coherent(&whc->umc->dev, WHC_GEN_CMD_DATA_LEN,
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&whc->gen_cmd_buf_dma, GFP_KERNEL);
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if (whc->gen_cmd_buf == NULL) {
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ret = -ENOMEM;
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goto error;
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}
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whc->dn_buf = dma_alloc_coherent(&whc->umc->dev,
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sizeof(struct dn_buf_entry) * WHC_N_DN_ENTRIES,
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&whc->dn_buf_dma, GFP_KERNEL);
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if (!whc->dn_buf) {
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ret = -ENOMEM;
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goto error;
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}
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whc_hw_init_dn_buf(whc);
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whc->di_buf = dma_alloc_coherent(&whc->umc->dev,
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sizeof(struct di_buf_entry) * whc->n_devices,
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&whc->di_buf_dma, GFP_KERNEL);
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if (!whc->di_buf) {
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ret = -ENOMEM;
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goto error;
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}
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whc_hw_init_di_buf(whc);
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return 0;
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error:
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whc_clean_up(whc);
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return ret;
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}
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void whc_clean_up(struct whc *whc)
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{
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resource_size_t len;
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if (whc->di_buf)
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dma_free_coherent(&whc->umc->dev, sizeof(struct di_buf_entry) * whc->n_devices,
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whc->di_buf, whc->di_buf_dma);
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if (whc->dn_buf)
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dma_free_coherent(&whc->umc->dev, sizeof(struct dn_buf_entry) * WHC_N_DN_ENTRIES,
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whc->dn_buf, whc->dn_buf_dma);
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if (whc->gen_cmd_buf)
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dma_free_coherent(&whc->umc->dev, WHC_GEN_CMD_DATA_LEN,
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whc->gen_cmd_buf, whc->gen_cmd_buf_dma);
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pzl_clean_up(whc);
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asl_clean_up(whc);
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if (whc->qset_pool)
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dma_pool_destroy(whc->qset_pool);
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len = resource_size(&whc->umc->resource);
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if (whc->base)
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iounmap(whc->base);
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if (whc->base_phys)
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release_mem_region(whc->base_phys, len);
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if (whc->workqueue)
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destroy_workqueue(whc->workqueue);
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}
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