drivers/usb/host/whci/whcd.h

   1 /*
   2  * Wireless Host Controller (WHC) private header.
   3  *
   4  * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version
   8  * 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  * 02110-1301, USA.
  19  */
  20 #ifndef __WHCD_H
  21 #define __WHCD_H
  22
  23 #include <linux/uwb/whci.h>
  24 #include <linux/uwb/umc.h>
  25 #include <linux/workqueue.h>
  26
  27 #include "whci-hc.h"
  28
  29 /* Generic command timeout. */
  30 #define WHC_GENCMD_TIMEOUT_MS 100
  31
  32 struct whc_dbg;
  33
  34 struct whc {
  35         struct wusbhc wusbhc;
  36         struct umc_dev *umc;
  37
  38         resource_size_t base_phys;
  39         void __iomem *base;
  40         int irq;
  41
  42         u8 n_devices;
  43         u8 n_keys;
  44         u8 n_mmc_ies;
  45
  46         u64 *pz_list;
  47         struct dn_buf_entry *dn_buf;
  48         struct di_buf_entry *di_buf;
  49         dma_addr_t pz_list_dma;
  50         dma_addr_t dn_buf_dma;
  51         dma_addr_t di_buf_dma;
  52
  53         spinlock_t   lock;
  54         struct mutex mutex;
  55
  56         void *            gen_cmd_buf;
  57         dma_addr_t        gen_cmd_buf_dma;
  58         wait_queue_head_t cmd_wq;
  59
  60         struct workqueue_struct *workqueue;
  61         struct work_struct       dn_work;
  62
  63         struct dma_pool *qset_pool;
  64
  65         struct list_head async_list;
  66         struct list_head async_removed_list;
  67         wait_queue_head_t async_list_wq;
  68         struct work_struct async_work;
  69
  70         struct list_head periodic_list[5];
  71         struct list_head periodic_removed_list;
  72         wait_queue_head_t periodic_list_wq;
  73         struct work_struct periodic_work;
  74
  75         struct whc_dbg *dbg;
  76 };
  77
  78 #define wusbhc_to_whc(w) (container_of((w), struct whc, wusbhc))
  79
  80 /**
  81  * struct whc_std - a software TD.
  82  * @urb: the URB this sTD is for.
  83  * @offset: start of the URB's data for this TD.
  84  * @len: the length of data in the associated TD.
  85  * @ntds_remaining: number of TDs (starting from this one) in this transfer.
  86  *
  87  * @bounce_buf: a bounce buffer if the std was from an urb with a sg
  88  * list that could not be mapped to qTDs directly.
  89  * @bounce_sg: the first scatterlist element bounce_buf is for.
  90  * @bounce_offset: the offset into bounce_sg for the start of bounce_buf.
  91  *
  92  * Queued URBs may require more TDs than are available in a qset so we
  93  * use a list of these "software TDs" (sTDs) to hold per-TD data.
  94  */
  95 struct whc_std {
  96         struct urb *urb;
  97         size_t len;
  98         int    ntds_remaining;
  99         struct whc_qtd *qtd;
 100
 101         struct list_head list_node;
 102         int num_pointers;
 103         dma_addr_t dma_addr;
 104         struct whc_page_list_entry *pl_virt;
 105
 106         void *bounce_buf;
 107         struct scatterlist *bounce_sg;
 108         unsigned bounce_offset;
 109 };
 110
 111 /**
 112  * struct whc_urb - per URB host controller structure.
 113  * @urb: the URB this struct is for.
 114  * @qset: the qset associated to the URB.
 115  * @dequeue_work: the work to remove the URB when dequeued.
 116  * @is_async: the URB belongs to async sheduler or not.
 117  * @status: the status to be returned when calling wusbhc_giveback_urb.
 118  */
 119 struct whc_urb {
 120         struct urb *urb;
 121         struct whc_qset *qset;
 122         struct work_struct dequeue_work;
 123         bool is_async;
 124         int status;
 125 };
 126
 127 /**
 128  * whc_std_last - is this sTD the URB's last?
 129  * @std: the sTD to check.
 130  */
 131 static inline bool whc_std_last(struct whc_std *std)
 132 {
 133         return std->ntds_remaining <= 1;
 134 }
 135
 136 enum whc_update {
 137         WHC_UPDATE_ADDED   = 0x01,
 138         WHC_UPDATE_REMOVED = 0x02,
 139         WHC_UPDATE_UPDATED = 0x04,
 140 };
 141
 142 /* init.c */
 143 int whc_init(struct whc *whc);
 144 void whc_clean_up(struct whc *whc);
 145
 146 /* hw.c */
 147 void whc_write_wusbcmd(struct whc *whc, u32 mask, u32 val);
 148 int whc_do_gencmd(struct whc *whc, u32 cmd, u32 params, void *addr, size_t len);
 149 void whc_hw_error(struct whc *whc, const char *reason);
 150
 151 /* wusb.c */
 152 int whc_wusbhc_start(struct wusbhc *wusbhc);
 153 void whc_wusbhc_stop(struct wusbhc *wusbhc, int delay);
 154 int whc_mmcie_add(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
 155                   u8 handle, struct wuie_hdr *wuie);
 156 int whc_mmcie_rm(struct wusbhc *wusbhc, u8 handle);
 157 int whc_bwa_set(struct wusbhc *wusbhc, s8 stream_index, const struct uwb_mas_bm *mas_bm);
 158 int whc_dev_info_set(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev);
 159 int whc_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots);
 160 int whc_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
 161                 const void *ptk, size_t key_size);
 162 int whc_set_gtk(struct wusbhc *wusbhc, u32 tkid,
 163                 const void *gtk, size_t key_size);
 164 int whc_set_cluster_id(struct whc *whc, u8 bcid);
 165
 166 /* int.c */
 167 irqreturn_t whc_int_handler(struct usb_hcd *hcd);
 168 void whc_dn_work(struct work_struct *work);
 169
 170 /* asl.c */
 171 void asl_start(struct whc *whc);
 172 void asl_stop(struct whc *whc);
 173 int  asl_init(struct whc *whc);
 174 void asl_clean_up(struct whc *whc);
 175 int  asl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags);
 176 int  asl_urb_dequeue(struct whc *whc, struct urb *urb, int status);
 177 void asl_qset_delete(struct whc *whc, struct whc_qset *qset);
 178 void scan_async_work(struct work_struct *work);
 179
 180 /* pzl.c */
 181 int  pzl_init(struct whc *whc);
 182 void pzl_clean_up(struct whc *whc);
 183 void pzl_start(struct whc *whc);
 184 void pzl_stop(struct whc *whc);
 185 int  pzl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags);
 186 int  pzl_urb_dequeue(struct whc *whc, struct urb *urb, int status);
 187 void pzl_qset_delete(struct whc *whc, struct whc_qset *qset);
 188 void scan_periodic_work(struct work_struct *work);
 189
 190 /* qset.c */
 191 struct whc_qset *qset_alloc(struct whc *whc, gfp_t mem_flags);
 192 void qset_free(struct whc *whc, struct whc_qset *qset);
 193 struct whc_qset *get_qset(struct whc *whc, struct urb *urb, gfp_t mem_flags);
 194 void qset_delete(struct whc *whc, struct whc_qset *qset);
 195 void qset_clear(struct whc *whc, struct whc_qset *qset);
 196 void qset_reset(struct whc *whc, struct whc_qset *qset);
 197 int qset_add_urb(struct whc *whc, struct whc_qset *qset, struct urb *urb,
 198                  gfp_t mem_flags);
 199 void qset_free_std(struct whc *whc, struct whc_std *std);
 200 void qset_remove_urb(struct whc *whc, struct whc_qset *qset,
 201                             struct urb *urb, int status);
 202 void process_halted_qtd(struct whc *whc, struct whc_qset *qset,
 203                                struct whc_qtd *qtd);
 204 void process_inactive_qtd(struct whc *whc, struct whc_qset *qset,
 205                                  struct whc_qtd *qtd);
 206 enum whc_update qset_add_qtds(struct whc *whc, struct whc_qset *qset);
 207 void qset_remove_complete(struct whc *whc, struct whc_qset *qset);
 208 void pzl_update(struct whc *whc, uint32_t wusbcmd);
 209 void asl_update(struct whc *whc, uint32_t wusbcmd);
 210
 211 /* debug.c */
 212 void whc_dbg_init(struct whc *whc);
 213 void whc_dbg_clean_up(struct whc *whc);
 214
 215 #endif /* #ifndef __WHCD_H */