1bdcd8170SKalle Valo /* 2bdcd8170SKalle Valo * Copyright (c) 2004-2011 Atheros Communications Inc. 3bdcd8170SKalle Valo * 4bdcd8170SKalle Valo * Permission to use, copy, modify, and/or distribute this software for any 5bdcd8170SKalle Valo * purpose with or without fee is hereby granted, provided that the above 6bdcd8170SKalle Valo * copyright notice and this permission notice appear in all copies. 7bdcd8170SKalle Valo * 8bdcd8170SKalle Valo * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9bdcd8170SKalle Valo * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10bdcd8170SKalle Valo * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11bdcd8170SKalle Valo * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12bdcd8170SKalle Valo * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13bdcd8170SKalle Valo * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14bdcd8170SKalle Valo * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15bdcd8170SKalle Valo */ 16bdcd8170SKalle Valo 17bdcd8170SKalle Valo #include <linux/mmc/card.h> 18bdcd8170SKalle Valo #include <linux/mmc/mmc.h> 19bdcd8170SKalle Valo #include <linux/mmc/host.h> 20bdcd8170SKalle Valo #include <linux/mmc/sdio_func.h> 21bdcd8170SKalle Valo #include <linux/mmc/sdio_ids.h> 22bdcd8170SKalle Valo #include <linux/mmc/sdio.h> 23bdcd8170SKalle Valo #include <linux/mmc/sd.h> 24bdcd8170SKalle Valo #include "htc_hif.h" 25bdcd8170SKalle Valo #include "hif-ops.h" 26bdcd8170SKalle Valo #include "target.h" 27bdcd8170SKalle Valo #include "debug.h" 289df337a1SVivek Natarajan #include "cfg80211.h" 29bdcd8170SKalle Valo 30bdcd8170SKalle Valo struct ath6kl_sdio { 31bdcd8170SKalle Valo struct sdio_func *func; 32bdcd8170SKalle Valo 33bdcd8170SKalle Valo spinlock_t lock; 34bdcd8170SKalle Valo 35bdcd8170SKalle Valo /* free list */ 36bdcd8170SKalle Valo struct list_head bus_req_freeq; 37bdcd8170SKalle Valo 38bdcd8170SKalle Valo /* available bus requests */ 39bdcd8170SKalle Valo struct bus_request bus_req[BUS_REQUEST_MAX_NUM]; 40bdcd8170SKalle Valo 41bdcd8170SKalle Valo struct ath6kl *ar; 42bdcd8170SKalle Valo u8 *dma_buffer; 43bdcd8170SKalle Valo 44bdcd8170SKalle Valo /* scatter request list head */ 45bdcd8170SKalle Valo struct list_head scat_req; 46bdcd8170SKalle Valo 47bdcd8170SKalle Valo spinlock_t scat_lock; 48bdcd8170SKalle Valo bool is_disabled; 49bdcd8170SKalle Valo atomic_t irq_handling; 50bdcd8170SKalle Valo const struct sdio_device_id *id; 51bdcd8170SKalle Valo struct work_struct wr_async_work; 52bdcd8170SKalle Valo struct list_head wr_asyncq; 53bdcd8170SKalle Valo spinlock_t wr_async_lock; 54bdcd8170SKalle Valo }; 55bdcd8170SKalle Valo 56bdcd8170SKalle Valo #define CMD53_ARG_READ 0 57bdcd8170SKalle Valo #define CMD53_ARG_WRITE 1 58bdcd8170SKalle Valo #define CMD53_ARG_BLOCK_BASIS 1 59bdcd8170SKalle Valo #define CMD53_ARG_FIXED_ADDRESS 0 60bdcd8170SKalle Valo #define CMD53_ARG_INCR_ADDRESS 1 61bdcd8170SKalle Valo 62bdcd8170SKalle Valo static inline struct ath6kl_sdio *ath6kl_sdio_priv(struct ath6kl *ar) 63bdcd8170SKalle Valo { 64bdcd8170SKalle Valo return ar->hif_priv; 65bdcd8170SKalle Valo } 66bdcd8170SKalle Valo 67bdcd8170SKalle Valo /* 68bdcd8170SKalle Valo * Macro to check if DMA buffer is WORD-aligned and DMA-able. 69bdcd8170SKalle Valo * Most host controllers assume the buffer is DMA'able and will 70bdcd8170SKalle Valo * bug-check otherwise (i.e. buffers on the stack). virt_addr_valid 71bdcd8170SKalle Valo * check fails on stack memory. 72bdcd8170SKalle Valo */ 73bdcd8170SKalle Valo static inline bool buf_needs_bounce(u8 *buf) 74bdcd8170SKalle Valo { 75bdcd8170SKalle Valo return ((unsigned long) buf & 0x3) || !virt_addr_valid(buf); 76bdcd8170SKalle Valo } 77bdcd8170SKalle Valo 78bdcd8170SKalle Valo static void ath6kl_sdio_set_mbox_info(struct ath6kl *ar) 79bdcd8170SKalle Valo { 80bdcd8170SKalle Valo struct ath6kl_mbox_info *mbox_info = &ar->mbox_info; 81bdcd8170SKalle Valo 82bdcd8170SKalle Valo /* EP1 has an extended range */ 83bdcd8170SKalle Valo mbox_info->htc_addr = HIF_MBOX_BASE_ADDR; 84bdcd8170SKalle Valo mbox_info->htc_ext_addr = HIF_MBOX0_EXT_BASE_ADDR; 85bdcd8170SKalle Valo mbox_info->htc_ext_sz = HIF_MBOX0_EXT_WIDTH; 86bdcd8170SKalle Valo mbox_info->block_size = HIF_MBOX_BLOCK_SIZE; 87bdcd8170SKalle Valo mbox_info->gmbox_addr = HIF_GMBOX_BASE_ADDR; 88bdcd8170SKalle Valo mbox_info->gmbox_sz = HIF_GMBOX_WIDTH; 89bdcd8170SKalle Valo } 90bdcd8170SKalle Valo 91bdcd8170SKalle Valo static inline void ath6kl_sdio_set_cmd53_arg(u32 *arg, u8 rw, u8 func, 92bdcd8170SKalle Valo u8 mode, u8 opcode, u32 addr, 93bdcd8170SKalle Valo u16 blksz) 94bdcd8170SKalle Valo { 95bdcd8170SKalle Valo *arg = (((rw & 1) << 31) | 96bdcd8170SKalle Valo ((func & 0x7) << 28) | 97bdcd8170SKalle Valo ((mode & 1) << 27) | 98bdcd8170SKalle Valo ((opcode & 1) << 26) | 99bdcd8170SKalle Valo ((addr & 0x1FFFF) << 9) | 100bdcd8170SKalle Valo (blksz & 0x1FF)); 101bdcd8170SKalle Valo } 102bdcd8170SKalle Valo 103bdcd8170SKalle Valo static inline void ath6kl_sdio_set_cmd52_arg(u32 *arg, u8 write, u8 raw, 104bdcd8170SKalle Valo unsigned int address, 105bdcd8170SKalle Valo unsigned char val) 106bdcd8170SKalle Valo { 107bdcd8170SKalle Valo const u8 func = 0; 108bdcd8170SKalle Valo 109bdcd8170SKalle Valo *arg = ((write & 1) << 31) | 110bdcd8170SKalle Valo ((func & 0x7) << 28) | 111bdcd8170SKalle Valo ((raw & 1) << 27) | 112bdcd8170SKalle Valo (1 << 26) | 113bdcd8170SKalle Valo ((address & 0x1FFFF) << 9) | 114bdcd8170SKalle Valo (1 << 8) | 115bdcd8170SKalle Valo (val & 0xFF); 116bdcd8170SKalle Valo } 117bdcd8170SKalle Valo 118bdcd8170SKalle Valo static int ath6kl_sdio_func0_cmd52_wr_byte(struct mmc_card *card, 119bdcd8170SKalle Valo unsigned int address, 120bdcd8170SKalle Valo unsigned char byte) 121bdcd8170SKalle Valo { 122bdcd8170SKalle Valo struct mmc_command io_cmd; 123bdcd8170SKalle Valo 124bdcd8170SKalle Valo memset(&io_cmd, 0, sizeof(io_cmd)); 125bdcd8170SKalle Valo ath6kl_sdio_set_cmd52_arg(&io_cmd.arg, 1, 0, address, byte); 126bdcd8170SKalle Valo io_cmd.opcode = SD_IO_RW_DIRECT; 127bdcd8170SKalle Valo io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC; 128bdcd8170SKalle Valo 129bdcd8170SKalle Valo return mmc_wait_for_cmd(card->host, &io_cmd, 0); 130bdcd8170SKalle Valo } 131bdcd8170SKalle Valo 132da220695SVasanthakumar Thiagarajan static int ath6kl_sdio_io(struct sdio_func *func, u32 request, u32 addr, 133da220695SVasanthakumar Thiagarajan u8 *buf, u32 len) 134da220695SVasanthakumar Thiagarajan { 135da220695SVasanthakumar Thiagarajan int ret = 0; 136da220695SVasanthakumar Thiagarajan 137da220695SVasanthakumar Thiagarajan if (request & HIF_WRITE) { 138da220695SVasanthakumar Thiagarajan if (addr >= HIF_MBOX_BASE_ADDR && 139da220695SVasanthakumar Thiagarajan addr <= HIF_MBOX_END_ADDR) 140da220695SVasanthakumar Thiagarajan addr += (HIF_MBOX_WIDTH - len); 141da220695SVasanthakumar Thiagarajan 142da220695SVasanthakumar Thiagarajan if (addr == HIF_MBOX0_EXT_BASE_ADDR) 143da220695SVasanthakumar Thiagarajan addr += HIF_MBOX0_EXT_WIDTH - len; 144da220695SVasanthakumar Thiagarajan 145da220695SVasanthakumar Thiagarajan if (request & HIF_FIXED_ADDRESS) 146da220695SVasanthakumar Thiagarajan ret = sdio_writesb(func, addr, buf, len); 147da220695SVasanthakumar Thiagarajan else 148da220695SVasanthakumar Thiagarajan ret = sdio_memcpy_toio(func, addr, buf, len); 149da220695SVasanthakumar Thiagarajan } else { 150da220695SVasanthakumar Thiagarajan if (request & HIF_FIXED_ADDRESS) 151da220695SVasanthakumar Thiagarajan ret = sdio_readsb(func, buf, addr, len); 152da220695SVasanthakumar Thiagarajan else 153da220695SVasanthakumar Thiagarajan ret = sdio_memcpy_fromio(func, buf, addr, len); 154da220695SVasanthakumar Thiagarajan } 155da220695SVasanthakumar Thiagarajan 156da220695SVasanthakumar Thiagarajan return ret; 157da220695SVasanthakumar Thiagarajan } 158da220695SVasanthakumar Thiagarajan 159bdcd8170SKalle Valo static struct bus_request *ath6kl_sdio_alloc_busreq(struct ath6kl_sdio *ar_sdio) 160bdcd8170SKalle Valo { 161bdcd8170SKalle Valo struct bus_request *bus_req; 162bdcd8170SKalle Valo unsigned long flag; 163bdcd8170SKalle Valo 164bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->lock, flag); 165bdcd8170SKalle Valo 166bdcd8170SKalle Valo if (list_empty(&ar_sdio->bus_req_freeq)) { 167bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->lock, flag); 168bdcd8170SKalle Valo return NULL; 169bdcd8170SKalle Valo } 170bdcd8170SKalle Valo 171bdcd8170SKalle Valo bus_req = list_first_entry(&ar_sdio->bus_req_freeq, 172bdcd8170SKalle Valo struct bus_request, list); 173bdcd8170SKalle Valo list_del(&bus_req->list); 174bdcd8170SKalle Valo 175bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->lock, flag); 176bdcd8170SKalle Valo ath6kl_dbg(ATH6KL_DBG_TRC, "%s: bus request 0x%p\n", __func__, bus_req); 177bdcd8170SKalle Valo 178bdcd8170SKalle Valo return bus_req; 179bdcd8170SKalle Valo } 180bdcd8170SKalle Valo 181bdcd8170SKalle Valo static void ath6kl_sdio_free_bus_req(struct ath6kl_sdio *ar_sdio, 182bdcd8170SKalle Valo struct bus_request *bus_req) 183bdcd8170SKalle Valo { 184bdcd8170SKalle Valo unsigned long flag; 185bdcd8170SKalle Valo 186bdcd8170SKalle Valo ath6kl_dbg(ATH6KL_DBG_TRC, "%s: bus request 0x%p\n", __func__, bus_req); 187bdcd8170SKalle Valo 188bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->lock, flag); 189bdcd8170SKalle Valo list_add_tail(&bus_req->list, &ar_sdio->bus_req_freeq); 190bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->lock, flag); 191bdcd8170SKalle Valo } 192bdcd8170SKalle Valo 193bdcd8170SKalle Valo static void ath6kl_sdio_setup_scat_data(struct hif_scatter_req *scat_req, 194bdcd8170SKalle Valo struct mmc_data *data) 195bdcd8170SKalle Valo { 196bdcd8170SKalle Valo struct scatterlist *sg; 197bdcd8170SKalle Valo int i; 198bdcd8170SKalle Valo 199bdcd8170SKalle Valo data->blksz = HIF_MBOX_BLOCK_SIZE; 200bdcd8170SKalle Valo data->blocks = scat_req->len / HIF_MBOX_BLOCK_SIZE; 201bdcd8170SKalle Valo 202bdcd8170SKalle Valo ath6kl_dbg(ATH6KL_DBG_SCATTER, 203bdcd8170SKalle Valo "hif-scatter: (%s) addr: 0x%X, (block len: %d, block count: %d) , (tot:%d,sg:%d)\n", 204bdcd8170SKalle Valo (scat_req->req & HIF_WRITE) ? "WR" : "RD", scat_req->addr, 205bdcd8170SKalle Valo data->blksz, data->blocks, scat_req->len, 206bdcd8170SKalle Valo scat_req->scat_entries); 207bdcd8170SKalle Valo 208bdcd8170SKalle Valo data->flags = (scat_req->req & HIF_WRITE) ? MMC_DATA_WRITE : 209bdcd8170SKalle Valo MMC_DATA_READ; 210bdcd8170SKalle Valo 211bdcd8170SKalle Valo /* fill SG entries */ 212d4df7890SVasanthakumar Thiagarajan sg = scat_req->sgentries; 213bdcd8170SKalle Valo sg_init_table(sg, scat_req->scat_entries); 214bdcd8170SKalle Valo 215bdcd8170SKalle Valo /* assemble SG list */ 216bdcd8170SKalle Valo for (i = 0; i < scat_req->scat_entries; i++, sg++) { 217bdcd8170SKalle Valo ath6kl_dbg(ATH6KL_DBG_SCATTER, "%d: addr:0x%p, len:%d\n", 218bdcd8170SKalle Valo i, scat_req->scat_list[i].buf, 219bdcd8170SKalle Valo scat_req->scat_list[i].len); 220bdcd8170SKalle Valo 221bdcd8170SKalle Valo sg_set_buf(sg, scat_req->scat_list[i].buf, 222bdcd8170SKalle Valo scat_req->scat_list[i].len); 223bdcd8170SKalle Valo } 224bdcd8170SKalle Valo 225bdcd8170SKalle Valo /* set scatter-gather table for request */ 226d4df7890SVasanthakumar Thiagarajan data->sg = scat_req->sgentries; 227bdcd8170SKalle Valo data->sg_len = scat_req->scat_entries; 228bdcd8170SKalle Valo } 229bdcd8170SKalle Valo 230bdcd8170SKalle Valo static int ath6kl_sdio_scat_rw(struct ath6kl_sdio *ar_sdio, 231bdcd8170SKalle Valo struct bus_request *req) 232bdcd8170SKalle Valo { 233bdcd8170SKalle Valo struct mmc_request mmc_req; 234bdcd8170SKalle Valo struct mmc_command cmd; 235bdcd8170SKalle Valo struct mmc_data data; 236bdcd8170SKalle Valo struct hif_scatter_req *scat_req; 237bdcd8170SKalle Valo u8 opcode, rw; 238348a8fbcSVasanthakumar Thiagarajan int status, len; 239bdcd8170SKalle Valo 240bdcd8170SKalle Valo scat_req = req->scat_req; 241bdcd8170SKalle Valo 242348a8fbcSVasanthakumar Thiagarajan if (scat_req->virt_scat) { 243348a8fbcSVasanthakumar Thiagarajan len = scat_req->len; 244348a8fbcSVasanthakumar Thiagarajan if (scat_req->req & HIF_BLOCK_BASIS) 245348a8fbcSVasanthakumar Thiagarajan len = round_down(len, HIF_MBOX_BLOCK_SIZE); 246348a8fbcSVasanthakumar Thiagarajan 247348a8fbcSVasanthakumar Thiagarajan status = ath6kl_sdio_io(ar_sdio->func, scat_req->req, 248348a8fbcSVasanthakumar Thiagarajan scat_req->addr, scat_req->virt_dma_buf, 249348a8fbcSVasanthakumar Thiagarajan len); 250348a8fbcSVasanthakumar Thiagarajan goto scat_complete; 251348a8fbcSVasanthakumar Thiagarajan } 252348a8fbcSVasanthakumar Thiagarajan 253bdcd8170SKalle Valo memset(&mmc_req, 0, sizeof(struct mmc_request)); 254bdcd8170SKalle Valo memset(&cmd, 0, sizeof(struct mmc_command)); 255bdcd8170SKalle Valo memset(&data, 0, sizeof(struct mmc_data)); 256bdcd8170SKalle Valo 257d4df7890SVasanthakumar Thiagarajan ath6kl_sdio_setup_scat_data(scat_req, &data); 258bdcd8170SKalle Valo 259bdcd8170SKalle Valo opcode = (scat_req->req & HIF_FIXED_ADDRESS) ? 260bdcd8170SKalle Valo CMD53_ARG_FIXED_ADDRESS : CMD53_ARG_INCR_ADDRESS; 261bdcd8170SKalle Valo 262bdcd8170SKalle Valo rw = (scat_req->req & HIF_WRITE) ? CMD53_ARG_WRITE : CMD53_ARG_READ; 263bdcd8170SKalle Valo 264bdcd8170SKalle Valo /* Fixup the address so that the last byte will fall on MBOX EOM */ 265bdcd8170SKalle Valo if (scat_req->req & HIF_WRITE) { 266bdcd8170SKalle Valo if (scat_req->addr == HIF_MBOX_BASE_ADDR) 267bdcd8170SKalle Valo scat_req->addr += HIF_MBOX_WIDTH - scat_req->len; 268bdcd8170SKalle Valo else 269bdcd8170SKalle Valo /* Uses extended address range */ 270bdcd8170SKalle Valo scat_req->addr += HIF_MBOX0_EXT_WIDTH - scat_req->len; 271bdcd8170SKalle Valo } 272bdcd8170SKalle Valo 273bdcd8170SKalle Valo /* set command argument */ 274bdcd8170SKalle Valo ath6kl_sdio_set_cmd53_arg(&cmd.arg, rw, ar_sdio->func->num, 275bdcd8170SKalle Valo CMD53_ARG_BLOCK_BASIS, opcode, scat_req->addr, 276bdcd8170SKalle Valo data.blocks); 277bdcd8170SKalle Valo 278bdcd8170SKalle Valo cmd.opcode = SD_IO_RW_EXTENDED; 279bdcd8170SKalle Valo cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC; 280bdcd8170SKalle Valo 281bdcd8170SKalle Valo mmc_req.cmd = &cmd; 282bdcd8170SKalle Valo mmc_req.data = &data; 283bdcd8170SKalle Valo 284bdcd8170SKalle Valo mmc_set_data_timeout(&data, ar_sdio->func->card); 285bdcd8170SKalle Valo /* synchronous call to process request */ 286bdcd8170SKalle Valo mmc_wait_for_req(ar_sdio->func->card->host, &mmc_req); 287bdcd8170SKalle Valo 288bdcd8170SKalle Valo status = cmd.error ? cmd.error : data.error; 289348a8fbcSVasanthakumar Thiagarajan 290348a8fbcSVasanthakumar Thiagarajan scat_complete: 291bdcd8170SKalle Valo scat_req->status = status; 292bdcd8170SKalle Valo 293bdcd8170SKalle Valo if (scat_req->status) 294bdcd8170SKalle Valo ath6kl_err("Scatter write request failed:%d\n", 295bdcd8170SKalle Valo scat_req->status); 296bdcd8170SKalle Valo 297bdcd8170SKalle Valo if (scat_req->req & HIF_ASYNCHRONOUS) 298e041c7f9SVasanthakumar Thiagarajan scat_req->complete(ar_sdio->ar->htc_target, scat_req); 299bdcd8170SKalle Valo 300bdcd8170SKalle Valo return status; 301bdcd8170SKalle Valo } 302bdcd8170SKalle Valo 3033df505adSVasanthakumar Thiagarajan static int ath6kl_sdio_alloc_prep_scat_req(struct ath6kl_sdio *ar_sdio, 3043df505adSVasanthakumar Thiagarajan int n_scat_entry, int n_scat_req, 3053df505adSVasanthakumar Thiagarajan bool virt_scat) 3063df505adSVasanthakumar Thiagarajan { 3073df505adSVasanthakumar Thiagarajan struct hif_scatter_req *s_req; 3083df505adSVasanthakumar Thiagarajan struct bus_request *bus_req; 309cfeab10bSVasanthakumar Thiagarajan int i, scat_req_sz, scat_list_sz, sg_sz, buf_sz; 310cfeab10bSVasanthakumar Thiagarajan u8 *virt_buf; 3113df505adSVasanthakumar Thiagarajan 3123df505adSVasanthakumar Thiagarajan scat_list_sz = (n_scat_entry - 1) * sizeof(struct hif_scatter_item); 3133df505adSVasanthakumar Thiagarajan scat_req_sz = sizeof(*s_req) + scat_list_sz; 3143df505adSVasanthakumar Thiagarajan 3153df505adSVasanthakumar Thiagarajan if (!virt_scat) 3163df505adSVasanthakumar Thiagarajan sg_sz = sizeof(struct scatterlist) * n_scat_entry; 317cfeab10bSVasanthakumar Thiagarajan else 318cfeab10bSVasanthakumar Thiagarajan buf_sz = 2 * L1_CACHE_BYTES + 319cfeab10bSVasanthakumar Thiagarajan ATH6KL_MAX_TRANSFER_SIZE_PER_SCATTER; 3203df505adSVasanthakumar Thiagarajan 3213df505adSVasanthakumar Thiagarajan for (i = 0; i < n_scat_req; i++) { 3223df505adSVasanthakumar Thiagarajan /* allocate the scatter request */ 3233df505adSVasanthakumar Thiagarajan s_req = kzalloc(scat_req_sz, GFP_KERNEL); 3243df505adSVasanthakumar Thiagarajan if (!s_req) 3253df505adSVasanthakumar Thiagarajan return -ENOMEM; 3263df505adSVasanthakumar Thiagarajan 327cfeab10bSVasanthakumar Thiagarajan if (virt_scat) { 328cfeab10bSVasanthakumar Thiagarajan virt_buf = kzalloc(buf_sz, GFP_KERNEL); 329cfeab10bSVasanthakumar Thiagarajan if (!virt_buf) { 330cfeab10bSVasanthakumar Thiagarajan kfree(s_req); 331cfeab10bSVasanthakumar Thiagarajan return -ENOMEM; 332cfeab10bSVasanthakumar Thiagarajan } 333cfeab10bSVasanthakumar Thiagarajan 334cfeab10bSVasanthakumar Thiagarajan s_req->virt_dma_buf = 335cfeab10bSVasanthakumar Thiagarajan (u8 *)L1_CACHE_ALIGN((unsigned long)virt_buf); 336cfeab10bSVasanthakumar Thiagarajan } else { 3373df505adSVasanthakumar Thiagarajan /* allocate sglist */ 3383df505adSVasanthakumar Thiagarajan s_req->sgentries = kzalloc(sg_sz, GFP_KERNEL); 3393df505adSVasanthakumar Thiagarajan 3403df505adSVasanthakumar Thiagarajan if (!s_req->sgentries) { 3413df505adSVasanthakumar Thiagarajan kfree(s_req); 3423df505adSVasanthakumar Thiagarajan return -ENOMEM; 3433df505adSVasanthakumar Thiagarajan } 3443df505adSVasanthakumar Thiagarajan } 3453df505adSVasanthakumar Thiagarajan 3463df505adSVasanthakumar Thiagarajan /* allocate a bus request for this scatter request */ 3473df505adSVasanthakumar Thiagarajan bus_req = ath6kl_sdio_alloc_busreq(ar_sdio); 3483df505adSVasanthakumar Thiagarajan if (!bus_req) { 3493df505adSVasanthakumar Thiagarajan kfree(s_req->sgentries); 350cfeab10bSVasanthakumar Thiagarajan kfree(s_req->virt_dma_buf); 3513df505adSVasanthakumar Thiagarajan kfree(s_req); 3523df505adSVasanthakumar Thiagarajan return -ENOMEM; 3533df505adSVasanthakumar Thiagarajan } 3543df505adSVasanthakumar Thiagarajan 3553df505adSVasanthakumar Thiagarajan /* assign the scatter request to this bus request */ 3563df505adSVasanthakumar Thiagarajan bus_req->scat_req = s_req; 3573df505adSVasanthakumar Thiagarajan s_req->busrequest = bus_req; 3583df505adSVasanthakumar Thiagarajan 3594a005c3eSVasanthakumar Thiagarajan s_req->virt_scat = virt_scat; 3604a005c3eSVasanthakumar Thiagarajan 3613df505adSVasanthakumar Thiagarajan /* add it to the scatter pool */ 3623df505adSVasanthakumar Thiagarajan hif_scatter_req_add(ar_sdio->ar, s_req); 3633df505adSVasanthakumar Thiagarajan } 3643df505adSVasanthakumar Thiagarajan 3653df505adSVasanthakumar Thiagarajan return 0; 3663df505adSVasanthakumar Thiagarajan } 3673df505adSVasanthakumar Thiagarajan 368bdcd8170SKalle Valo static int ath6kl_sdio_read_write_sync(struct ath6kl *ar, u32 addr, u8 *buf, 369bdcd8170SKalle Valo u32 len, u32 request) 370bdcd8170SKalle Valo { 371bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 372bdcd8170SKalle Valo u8 *tbuf = NULL; 373bdcd8170SKalle Valo int ret; 374bdcd8170SKalle Valo bool bounced = false; 375bdcd8170SKalle Valo 376bdcd8170SKalle Valo if (request & HIF_BLOCK_BASIS) 377bdcd8170SKalle Valo len = round_down(len, HIF_MBOX_BLOCK_SIZE); 378bdcd8170SKalle Valo 379bdcd8170SKalle Valo if (buf_needs_bounce(buf)) { 380bdcd8170SKalle Valo if (!ar_sdio->dma_buffer) 381bdcd8170SKalle Valo return -ENOMEM; 382bdcd8170SKalle Valo tbuf = ar_sdio->dma_buffer; 383bdcd8170SKalle Valo memcpy(tbuf, buf, len); 384bdcd8170SKalle Valo bounced = true; 385bdcd8170SKalle Valo } else 386bdcd8170SKalle Valo tbuf = buf; 387bdcd8170SKalle Valo 388bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 389da220695SVasanthakumar Thiagarajan ret = ath6kl_sdio_io(ar_sdio->func, request, addr, tbuf, len); 390da220695SVasanthakumar Thiagarajan if ((request & HIF_READ) && bounced) 391bdcd8170SKalle Valo memcpy(buf, tbuf, len); 392bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 393bdcd8170SKalle Valo 394bdcd8170SKalle Valo return ret; 395bdcd8170SKalle Valo } 396bdcd8170SKalle Valo 397bdcd8170SKalle Valo static void __ath6kl_sdio_write_async(struct ath6kl_sdio *ar_sdio, 398bdcd8170SKalle Valo struct bus_request *req) 399bdcd8170SKalle Valo { 400bdcd8170SKalle Valo if (req->scat_req) 401bdcd8170SKalle Valo ath6kl_sdio_scat_rw(ar_sdio, req); 402bdcd8170SKalle Valo else { 403bdcd8170SKalle Valo void *context; 404bdcd8170SKalle Valo int status; 405bdcd8170SKalle Valo 406bdcd8170SKalle Valo status = ath6kl_sdio_read_write_sync(ar_sdio->ar, req->address, 407bdcd8170SKalle Valo req->buffer, req->length, 408bdcd8170SKalle Valo req->request); 409bdcd8170SKalle Valo context = req->packet; 410bdcd8170SKalle Valo ath6kl_sdio_free_bus_req(ar_sdio, req); 411bdcd8170SKalle Valo ath6kldev_rw_comp_handler(context, status); 412bdcd8170SKalle Valo } 413bdcd8170SKalle Valo } 414bdcd8170SKalle Valo 415bdcd8170SKalle Valo static void ath6kl_sdio_write_async_work(struct work_struct *work) 416bdcd8170SKalle Valo { 417bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio; 418bdcd8170SKalle Valo unsigned long flags; 419bdcd8170SKalle Valo struct bus_request *req, *tmp_req; 420bdcd8170SKalle Valo 421bdcd8170SKalle Valo ar_sdio = container_of(work, struct ath6kl_sdio, wr_async_work); 422bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 423bdcd8170SKalle Valo 424bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->wr_async_lock, flags); 425bdcd8170SKalle Valo list_for_each_entry_safe(req, tmp_req, &ar_sdio->wr_asyncq, list) { 426bdcd8170SKalle Valo list_del(&req->list); 427bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags); 428bdcd8170SKalle Valo __ath6kl_sdio_write_async(ar_sdio, req); 429bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->wr_async_lock, flags); 430bdcd8170SKalle Valo } 431bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags); 432bdcd8170SKalle Valo 433bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 434bdcd8170SKalle Valo } 435bdcd8170SKalle Valo 436bdcd8170SKalle Valo static void ath6kl_sdio_irq_handler(struct sdio_func *func) 437bdcd8170SKalle Valo { 438bdcd8170SKalle Valo int status; 439bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio; 440bdcd8170SKalle Valo 441bdcd8170SKalle Valo ar_sdio = sdio_get_drvdata(func); 442bdcd8170SKalle Valo atomic_set(&ar_sdio->irq_handling, 1); 443bdcd8170SKalle Valo 444bdcd8170SKalle Valo /* 445bdcd8170SKalle Valo * Release the host during interrups so we can pick it back up when 446bdcd8170SKalle Valo * we process commands. 447bdcd8170SKalle Valo */ 448bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 449bdcd8170SKalle Valo 450bdcd8170SKalle Valo status = ath6kldev_intr_bh_handler(ar_sdio->ar); 451bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 452bdcd8170SKalle Valo atomic_set(&ar_sdio->irq_handling, 0); 453bdcd8170SKalle Valo WARN_ON(status && status != -ECANCELED); 454bdcd8170SKalle Valo } 455bdcd8170SKalle Valo 456bdcd8170SKalle Valo static int ath6kl_sdio_power_on(struct ath6kl_sdio *ar_sdio) 457bdcd8170SKalle Valo { 458bdcd8170SKalle Valo struct sdio_func *func = ar_sdio->func; 459bdcd8170SKalle Valo int ret = 0; 460bdcd8170SKalle Valo 461bdcd8170SKalle Valo if (!ar_sdio->is_disabled) 462bdcd8170SKalle Valo return 0; 463bdcd8170SKalle Valo 464bdcd8170SKalle Valo sdio_claim_host(func); 465bdcd8170SKalle Valo 466bdcd8170SKalle Valo ret = sdio_enable_func(func); 467bdcd8170SKalle Valo if (ret) { 468bdcd8170SKalle Valo ath6kl_err("Unable to enable sdio func: %d)\n", ret); 469bdcd8170SKalle Valo sdio_release_host(func); 470bdcd8170SKalle Valo return ret; 471bdcd8170SKalle Valo } 472bdcd8170SKalle Valo 473bdcd8170SKalle Valo sdio_release_host(func); 474bdcd8170SKalle Valo 475bdcd8170SKalle Valo /* 476bdcd8170SKalle Valo * Wait for hardware to initialise. It should take a lot less than 477bdcd8170SKalle Valo * 10 ms but let's be conservative here. 478bdcd8170SKalle Valo */ 479bdcd8170SKalle Valo msleep(10); 480bdcd8170SKalle Valo 481bdcd8170SKalle Valo ar_sdio->is_disabled = false; 482bdcd8170SKalle Valo 483bdcd8170SKalle Valo return ret; 484bdcd8170SKalle Valo } 485bdcd8170SKalle Valo 486bdcd8170SKalle Valo static int ath6kl_sdio_power_off(struct ath6kl_sdio *ar_sdio) 487bdcd8170SKalle Valo { 488bdcd8170SKalle Valo int ret; 489bdcd8170SKalle Valo 490bdcd8170SKalle Valo if (ar_sdio->is_disabled) 491bdcd8170SKalle Valo return 0; 492bdcd8170SKalle Valo 493bdcd8170SKalle Valo /* Disable the card */ 494bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 495bdcd8170SKalle Valo ret = sdio_disable_func(ar_sdio->func); 496bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 497bdcd8170SKalle Valo 498bdcd8170SKalle Valo if (ret) 499bdcd8170SKalle Valo return ret; 500bdcd8170SKalle Valo 501bdcd8170SKalle Valo ar_sdio->is_disabled = true; 502bdcd8170SKalle Valo 503bdcd8170SKalle Valo return ret; 504bdcd8170SKalle Valo } 505bdcd8170SKalle Valo 506bdcd8170SKalle Valo static int ath6kl_sdio_write_async(struct ath6kl *ar, u32 address, u8 *buffer, 507bdcd8170SKalle Valo u32 length, u32 request, 508bdcd8170SKalle Valo struct htc_packet *packet) 509bdcd8170SKalle Valo { 510bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 511bdcd8170SKalle Valo struct bus_request *bus_req; 512bdcd8170SKalle Valo unsigned long flags; 513bdcd8170SKalle Valo 514bdcd8170SKalle Valo bus_req = ath6kl_sdio_alloc_busreq(ar_sdio); 515bdcd8170SKalle Valo 516bdcd8170SKalle Valo if (!bus_req) 517bdcd8170SKalle Valo return -ENOMEM; 518bdcd8170SKalle Valo 519bdcd8170SKalle Valo bus_req->address = address; 520bdcd8170SKalle Valo bus_req->buffer = buffer; 521bdcd8170SKalle Valo bus_req->length = length; 522bdcd8170SKalle Valo bus_req->request = request; 523bdcd8170SKalle Valo bus_req->packet = packet; 524bdcd8170SKalle Valo 525bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->wr_async_lock, flags); 526bdcd8170SKalle Valo list_add_tail(&bus_req->list, &ar_sdio->wr_asyncq); 527bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags); 528bdcd8170SKalle Valo queue_work(ar->ath6kl_wq, &ar_sdio->wr_async_work); 529bdcd8170SKalle Valo 530bdcd8170SKalle Valo return 0; 531bdcd8170SKalle Valo } 532bdcd8170SKalle Valo 533bdcd8170SKalle Valo static void ath6kl_sdio_irq_enable(struct ath6kl *ar) 534bdcd8170SKalle Valo { 535bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 536bdcd8170SKalle Valo int ret; 537bdcd8170SKalle Valo 538bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 539bdcd8170SKalle Valo 540bdcd8170SKalle Valo /* Register the isr */ 541bdcd8170SKalle Valo ret = sdio_claim_irq(ar_sdio->func, ath6kl_sdio_irq_handler); 542bdcd8170SKalle Valo if (ret) 543bdcd8170SKalle Valo ath6kl_err("Failed to claim sdio irq: %d\n", ret); 544bdcd8170SKalle Valo 545bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 546bdcd8170SKalle Valo } 547bdcd8170SKalle Valo 548bdcd8170SKalle Valo static void ath6kl_sdio_irq_disable(struct ath6kl *ar) 549bdcd8170SKalle Valo { 550bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 551bdcd8170SKalle Valo int ret; 552bdcd8170SKalle Valo 553bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 554bdcd8170SKalle Valo 555bdcd8170SKalle Valo /* Mask our function IRQ */ 556bdcd8170SKalle Valo while (atomic_read(&ar_sdio->irq_handling)) { 557bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 558bdcd8170SKalle Valo schedule_timeout(HZ / 10); 559bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 560bdcd8170SKalle Valo } 561bdcd8170SKalle Valo 562bdcd8170SKalle Valo ret = sdio_release_irq(ar_sdio->func); 563bdcd8170SKalle Valo if (ret) 564bdcd8170SKalle Valo ath6kl_err("Failed to release sdio irq: %d\n", ret); 565bdcd8170SKalle Valo 566bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 567bdcd8170SKalle Valo } 568bdcd8170SKalle Valo 569bdcd8170SKalle Valo static struct hif_scatter_req *ath6kl_sdio_scatter_req_get(struct ath6kl *ar) 570bdcd8170SKalle Valo { 571bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 572bdcd8170SKalle Valo struct hif_scatter_req *node = NULL; 573bdcd8170SKalle Valo unsigned long flag; 574bdcd8170SKalle Valo 575bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->scat_lock, flag); 576bdcd8170SKalle Valo 577bdcd8170SKalle Valo if (!list_empty(&ar_sdio->scat_req)) { 578bdcd8170SKalle Valo node = list_first_entry(&ar_sdio->scat_req, 579bdcd8170SKalle Valo struct hif_scatter_req, list); 580bdcd8170SKalle Valo list_del(&node->list); 581bdcd8170SKalle Valo } 582bdcd8170SKalle Valo 583bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->scat_lock, flag); 584bdcd8170SKalle Valo 585bdcd8170SKalle Valo return node; 586bdcd8170SKalle Valo } 587bdcd8170SKalle Valo 588bdcd8170SKalle Valo static void ath6kl_sdio_scatter_req_add(struct ath6kl *ar, 589bdcd8170SKalle Valo struct hif_scatter_req *s_req) 590bdcd8170SKalle Valo { 591bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 592bdcd8170SKalle Valo unsigned long flag; 593bdcd8170SKalle Valo 594bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->scat_lock, flag); 595bdcd8170SKalle Valo 596bdcd8170SKalle Valo list_add_tail(&s_req->list, &ar_sdio->scat_req); 597bdcd8170SKalle Valo 598bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->scat_lock, flag); 599bdcd8170SKalle Valo 600bdcd8170SKalle Valo } 601bdcd8170SKalle Valo 602c630d18aSVasanthakumar Thiagarajan /* scatter gather read write request */ 603c630d18aSVasanthakumar Thiagarajan static int ath6kl_sdio_async_rw_scatter(struct ath6kl *ar, 604c630d18aSVasanthakumar Thiagarajan struct hif_scatter_req *scat_req) 605c630d18aSVasanthakumar Thiagarajan { 606c630d18aSVasanthakumar Thiagarajan struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 607c630d18aSVasanthakumar Thiagarajan u32 request = scat_req->req; 608c630d18aSVasanthakumar Thiagarajan int status = 0; 609c630d18aSVasanthakumar Thiagarajan unsigned long flags; 610c630d18aSVasanthakumar Thiagarajan 611c630d18aSVasanthakumar Thiagarajan if (!scat_req->len) 612c630d18aSVasanthakumar Thiagarajan return -EINVAL; 613c630d18aSVasanthakumar Thiagarajan 614c630d18aSVasanthakumar Thiagarajan ath6kl_dbg(ATH6KL_DBG_SCATTER, 615c630d18aSVasanthakumar Thiagarajan "hif-scatter: total len: %d scatter entries: %d\n", 616c630d18aSVasanthakumar Thiagarajan scat_req->len, scat_req->scat_entries); 617c630d18aSVasanthakumar Thiagarajan 618c630d18aSVasanthakumar Thiagarajan if (request & HIF_SYNCHRONOUS) { 619c630d18aSVasanthakumar Thiagarajan sdio_claim_host(ar_sdio->func); 620d4df7890SVasanthakumar Thiagarajan status = ath6kl_sdio_scat_rw(ar_sdio, scat_req->busrequest); 621c630d18aSVasanthakumar Thiagarajan sdio_release_host(ar_sdio->func); 622c630d18aSVasanthakumar Thiagarajan } else { 623c630d18aSVasanthakumar Thiagarajan spin_lock_irqsave(&ar_sdio->wr_async_lock, flags); 624d4df7890SVasanthakumar Thiagarajan list_add_tail(&scat_req->busrequest->list, &ar_sdio->wr_asyncq); 625c630d18aSVasanthakumar Thiagarajan spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags); 626c630d18aSVasanthakumar Thiagarajan queue_work(ar->ath6kl_wq, &ar_sdio->wr_async_work); 627c630d18aSVasanthakumar Thiagarajan } 628c630d18aSVasanthakumar Thiagarajan 629c630d18aSVasanthakumar Thiagarajan return status; 630c630d18aSVasanthakumar Thiagarajan } 631c630d18aSVasanthakumar Thiagarajan 63218a0f93eSVasanthakumar Thiagarajan /* clean up scatter support */ 63318a0f93eSVasanthakumar Thiagarajan static void ath6kl_sdio_cleanup_scatter(struct ath6kl *ar) 63418a0f93eSVasanthakumar Thiagarajan { 63518a0f93eSVasanthakumar Thiagarajan struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 63618a0f93eSVasanthakumar Thiagarajan struct hif_scatter_req *s_req, *tmp_req; 63718a0f93eSVasanthakumar Thiagarajan unsigned long flag; 63818a0f93eSVasanthakumar Thiagarajan 63918a0f93eSVasanthakumar Thiagarajan /* empty the free list */ 64018a0f93eSVasanthakumar Thiagarajan spin_lock_irqsave(&ar_sdio->scat_lock, flag); 64118a0f93eSVasanthakumar Thiagarajan list_for_each_entry_safe(s_req, tmp_req, &ar_sdio->scat_req, list) { 64218a0f93eSVasanthakumar Thiagarajan list_del(&s_req->list); 64318a0f93eSVasanthakumar Thiagarajan spin_unlock_irqrestore(&ar_sdio->scat_lock, flag); 64418a0f93eSVasanthakumar Thiagarajan 64518a0f93eSVasanthakumar Thiagarajan if (s_req->busrequest) 64618a0f93eSVasanthakumar Thiagarajan ath6kl_sdio_free_bus_req(ar_sdio, s_req->busrequest); 64718a0f93eSVasanthakumar Thiagarajan kfree(s_req->virt_dma_buf); 64818a0f93eSVasanthakumar Thiagarajan kfree(s_req->sgentries); 64918a0f93eSVasanthakumar Thiagarajan kfree(s_req); 65018a0f93eSVasanthakumar Thiagarajan 65118a0f93eSVasanthakumar Thiagarajan spin_lock_irqsave(&ar_sdio->scat_lock, flag); 65218a0f93eSVasanthakumar Thiagarajan } 65318a0f93eSVasanthakumar Thiagarajan spin_unlock_irqrestore(&ar_sdio->scat_lock, flag); 65418a0f93eSVasanthakumar Thiagarajan } 65518a0f93eSVasanthakumar Thiagarajan 65618a0f93eSVasanthakumar Thiagarajan /* setup of HIF scatter resources */ 65750745af7SVasanthakumar Thiagarajan static int ath6kl_sdio_enable_scatter(struct ath6kl *ar) 65818a0f93eSVasanthakumar Thiagarajan { 65918a0f93eSVasanthakumar Thiagarajan struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 66050745af7SVasanthakumar Thiagarajan struct htc_target *target = ar->htc_target; 661cfeab10bSVasanthakumar Thiagarajan int ret; 662cfeab10bSVasanthakumar Thiagarajan bool virt_scat = false; 66318a0f93eSVasanthakumar Thiagarajan 66418a0f93eSVasanthakumar Thiagarajan /* check if host supports scatter and it meets our requirements */ 66518a0f93eSVasanthakumar Thiagarajan if (ar_sdio->func->card->host->max_segs < MAX_SCATTER_ENTRIES_PER_REQ) { 666cfeab10bSVasanthakumar Thiagarajan ath6kl_err("host only supports scatter of :%d entries, need: %d\n", 66718a0f93eSVasanthakumar Thiagarajan ar_sdio->func->card->host->max_segs, 66818a0f93eSVasanthakumar Thiagarajan MAX_SCATTER_ENTRIES_PER_REQ); 669cfeab10bSVasanthakumar Thiagarajan virt_scat = true; 67018a0f93eSVasanthakumar Thiagarajan } 67118a0f93eSVasanthakumar Thiagarajan 672cfeab10bSVasanthakumar Thiagarajan if (!virt_scat) { 67318a0f93eSVasanthakumar Thiagarajan ret = ath6kl_sdio_alloc_prep_scat_req(ar_sdio, 67418a0f93eSVasanthakumar Thiagarajan MAX_SCATTER_ENTRIES_PER_REQ, 675cfeab10bSVasanthakumar Thiagarajan MAX_SCATTER_REQUESTS, virt_scat); 676cfeab10bSVasanthakumar Thiagarajan 677cfeab10bSVasanthakumar Thiagarajan if (!ret) { 678cfeab10bSVasanthakumar Thiagarajan ath6kl_dbg(ATH6KL_DBG_ANY, 679cfeab10bSVasanthakumar Thiagarajan "hif-scatter enabled: max scatter req : %d entries: %d\n", 680cfeab10bSVasanthakumar Thiagarajan MAX_SCATTER_REQUESTS, 681cfeab10bSVasanthakumar Thiagarajan MAX_SCATTER_ENTRIES_PER_REQ); 682cfeab10bSVasanthakumar Thiagarajan 68350745af7SVasanthakumar Thiagarajan target->max_scat_entries = MAX_SCATTER_ENTRIES_PER_REQ; 68450745af7SVasanthakumar Thiagarajan target->max_xfer_szper_scatreq = 685cfeab10bSVasanthakumar Thiagarajan MAX_SCATTER_REQ_TRANSFER_SIZE; 686cfeab10bSVasanthakumar Thiagarajan } else { 687cfeab10bSVasanthakumar Thiagarajan ath6kl_sdio_cleanup_scatter(ar); 688cfeab10bSVasanthakumar Thiagarajan ath6kl_warn("hif scatter resource setup failed, trying virtual scatter method\n"); 689cfeab10bSVasanthakumar Thiagarajan } 690cfeab10bSVasanthakumar Thiagarajan } 691cfeab10bSVasanthakumar Thiagarajan 692cfeab10bSVasanthakumar Thiagarajan if (virt_scat || ret) { 693cfeab10bSVasanthakumar Thiagarajan ret = ath6kl_sdio_alloc_prep_scat_req(ar_sdio, 694cfeab10bSVasanthakumar Thiagarajan ATH6KL_SCATTER_ENTRIES_PER_REQ, 695cfeab10bSVasanthakumar Thiagarajan ATH6KL_SCATTER_REQS, virt_scat); 696cfeab10bSVasanthakumar Thiagarajan 69718a0f93eSVasanthakumar Thiagarajan if (ret) { 698cfeab10bSVasanthakumar Thiagarajan ath6kl_err("failed to alloc virtual scatter resources !\n"); 69918a0f93eSVasanthakumar Thiagarajan ath6kl_sdio_cleanup_scatter(ar); 70018a0f93eSVasanthakumar Thiagarajan return ret; 70118a0f93eSVasanthakumar Thiagarajan } 70218a0f93eSVasanthakumar Thiagarajan 703cfeab10bSVasanthakumar Thiagarajan ath6kl_dbg(ATH6KL_DBG_ANY, 704cfeab10bSVasanthakumar Thiagarajan "Vitual scatter enabled, max_scat_req:%d, entries:%d\n", 705cfeab10bSVasanthakumar Thiagarajan ATH6KL_SCATTER_REQS, ATH6KL_SCATTER_ENTRIES_PER_REQ); 706cfeab10bSVasanthakumar Thiagarajan 70750745af7SVasanthakumar Thiagarajan target->max_scat_entries = ATH6KL_SCATTER_ENTRIES_PER_REQ; 70850745af7SVasanthakumar Thiagarajan target->max_xfer_szper_scatreq = 709cfeab10bSVasanthakumar Thiagarajan ATH6KL_MAX_TRANSFER_SIZE_PER_SCATTER; 710cfeab10bSVasanthakumar Thiagarajan } 711cfeab10bSVasanthakumar Thiagarajan 71218a0f93eSVasanthakumar Thiagarajan return 0; 71318a0f93eSVasanthakumar Thiagarajan } 71418a0f93eSVasanthakumar Thiagarajan 715abcb344bSKalle Valo static int ath6kl_sdio_suspend(struct ath6kl *ar) 716abcb344bSKalle Valo { 717abcb344bSKalle Valo struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 718abcb344bSKalle Valo struct sdio_func *func = ar_sdio->func; 719abcb344bSKalle Valo mmc_pm_flag_t flags; 720abcb344bSKalle Valo int ret; 721abcb344bSKalle Valo 722abcb344bSKalle Valo flags = sdio_get_host_pm_caps(func); 723abcb344bSKalle Valo 724abcb344bSKalle Valo if (!(flags & MMC_PM_KEEP_POWER)) 725abcb344bSKalle Valo /* as host doesn't support keep power we need to bail out */ 726abcb344bSKalle Valo return -EINVAL; 727abcb344bSKalle Valo 728abcb344bSKalle Valo ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); 729abcb344bSKalle Valo if (ret) { 730abcb344bSKalle Valo printk(KERN_ERR "ath6kl: set sdio pm flags failed: %d\n", 731abcb344bSKalle Valo ret); 732abcb344bSKalle Valo return ret; 733abcb344bSKalle Valo } 734abcb344bSKalle Valo 735abcb344bSKalle Valo ath6kl_deep_sleep_enable(ar); 736abcb344bSKalle Valo 737abcb344bSKalle Valo return 0; 738abcb344bSKalle Valo } 739abcb344bSKalle Valo 740bdcd8170SKalle Valo static const struct ath6kl_hif_ops ath6kl_sdio_ops = { 741bdcd8170SKalle Valo .read_write_sync = ath6kl_sdio_read_write_sync, 742bdcd8170SKalle Valo .write_async = ath6kl_sdio_write_async, 743bdcd8170SKalle Valo .irq_enable = ath6kl_sdio_irq_enable, 744bdcd8170SKalle Valo .irq_disable = ath6kl_sdio_irq_disable, 745bdcd8170SKalle Valo .scatter_req_get = ath6kl_sdio_scatter_req_get, 746bdcd8170SKalle Valo .scatter_req_add = ath6kl_sdio_scatter_req_add, 747bdcd8170SKalle Valo .enable_scatter = ath6kl_sdio_enable_scatter, 748f74a7361SVasanthakumar Thiagarajan .scat_req_rw = ath6kl_sdio_async_rw_scatter, 749bdcd8170SKalle Valo .cleanup_scatter = ath6kl_sdio_cleanup_scatter, 750abcb344bSKalle Valo .suspend = ath6kl_sdio_suspend, 751bdcd8170SKalle Valo }; 752bdcd8170SKalle Valo 753bdcd8170SKalle Valo static int ath6kl_sdio_probe(struct sdio_func *func, 754bdcd8170SKalle Valo const struct sdio_device_id *id) 755bdcd8170SKalle Valo { 756bdcd8170SKalle Valo int ret; 757bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio; 758bdcd8170SKalle Valo struct ath6kl *ar; 759bdcd8170SKalle Valo int count; 760bdcd8170SKalle Valo 761bdcd8170SKalle Valo ath6kl_dbg(ATH6KL_DBG_TRC, 762bdcd8170SKalle Valo "%s: func: 0x%X, vendor id: 0x%X, dev id: 0x%X, block size: 0x%X/0x%X\n", 763bdcd8170SKalle Valo __func__, func->num, func->vendor, 764bdcd8170SKalle Valo func->device, func->max_blksize, func->cur_blksize); 765bdcd8170SKalle Valo 766bdcd8170SKalle Valo ar_sdio = kzalloc(sizeof(struct ath6kl_sdio), GFP_KERNEL); 767bdcd8170SKalle Valo if (!ar_sdio) 768bdcd8170SKalle Valo return -ENOMEM; 769bdcd8170SKalle Valo 770bdcd8170SKalle Valo ar_sdio->dma_buffer = kzalloc(HIF_DMA_BUFFER_SIZE, GFP_KERNEL); 771bdcd8170SKalle Valo if (!ar_sdio->dma_buffer) { 772bdcd8170SKalle Valo ret = -ENOMEM; 773bdcd8170SKalle Valo goto err_hif; 774bdcd8170SKalle Valo } 775bdcd8170SKalle Valo 776bdcd8170SKalle Valo ar_sdio->func = func; 777bdcd8170SKalle Valo sdio_set_drvdata(func, ar_sdio); 778bdcd8170SKalle Valo 779bdcd8170SKalle Valo ar_sdio->id = id; 780bdcd8170SKalle Valo ar_sdio->is_disabled = true; 781bdcd8170SKalle Valo 782bdcd8170SKalle Valo spin_lock_init(&ar_sdio->lock); 783bdcd8170SKalle Valo spin_lock_init(&ar_sdio->scat_lock); 784bdcd8170SKalle Valo spin_lock_init(&ar_sdio->wr_async_lock); 785bdcd8170SKalle Valo 786bdcd8170SKalle Valo INIT_LIST_HEAD(&ar_sdio->scat_req); 787bdcd8170SKalle Valo INIT_LIST_HEAD(&ar_sdio->bus_req_freeq); 788bdcd8170SKalle Valo INIT_LIST_HEAD(&ar_sdio->wr_asyncq); 789bdcd8170SKalle Valo 790bdcd8170SKalle Valo INIT_WORK(&ar_sdio->wr_async_work, ath6kl_sdio_write_async_work); 791bdcd8170SKalle Valo 792bdcd8170SKalle Valo for (count = 0; count < BUS_REQUEST_MAX_NUM; count++) 793bdcd8170SKalle Valo ath6kl_sdio_free_bus_req(ar_sdio, &ar_sdio->bus_req[count]); 794bdcd8170SKalle Valo 795bdcd8170SKalle Valo ar = ath6kl_core_alloc(&ar_sdio->func->dev); 796bdcd8170SKalle Valo if (!ar) { 797bdcd8170SKalle Valo ath6kl_err("Failed to alloc ath6kl core\n"); 798bdcd8170SKalle Valo ret = -ENOMEM; 799bdcd8170SKalle Valo goto err_dma; 800bdcd8170SKalle Valo } 801bdcd8170SKalle Valo 802bdcd8170SKalle Valo ar_sdio->ar = ar; 803bdcd8170SKalle Valo ar->hif_priv = ar_sdio; 804bdcd8170SKalle Valo ar->hif_ops = &ath6kl_sdio_ops; 805bdcd8170SKalle Valo 806bdcd8170SKalle Valo ath6kl_sdio_set_mbox_info(ar); 807bdcd8170SKalle Valo 808bdcd8170SKalle Valo sdio_claim_host(func); 809bdcd8170SKalle Valo 810bdcd8170SKalle Valo if ((ar_sdio->id->device & MANUFACTURER_ID_ATH6KL_BASE_MASK) >= 811bdcd8170SKalle Valo MANUFACTURER_ID_AR6003_BASE) { 812bdcd8170SKalle Valo /* enable 4-bit ASYNC interrupt on AR6003 or later */ 813bdcd8170SKalle Valo ret = ath6kl_sdio_func0_cmd52_wr_byte(func->card, 814bdcd8170SKalle Valo CCCR_SDIO_IRQ_MODE_REG, 815bdcd8170SKalle Valo SDIO_IRQ_MODE_ASYNC_4BIT_IRQ); 816bdcd8170SKalle Valo if (ret) { 817bdcd8170SKalle Valo ath6kl_err("Failed to enable 4-bit async irq mode %d\n", 818bdcd8170SKalle Valo ret); 819bdcd8170SKalle Valo sdio_release_host(func); 8209df337a1SVivek Natarajan goto err_cfg80211; 821bdcd8170SKalle Valo } 822bdcd8170SKalle Valo 823bdcd8170SKalle Valo ath6kl_dbg(ATH6KL_DBG_TRC, "4-bit async irq mode enabled\n"); 824bdcd8170SKalle Valo } 825bdcd8170SKalle Valo 826bdcd8170SKalle Valo /* give us some time to enable, in ms */ 827bdcd8170SKalle Valo func->enable_timeout = 100; 828bdcd8170SKalle Valo 829bdcd8170SKalle Valo sdio_release_host(func); 830bdcd8170SKalle Valo 831bdcd8170SKalle Valo ret = ath6kl_sdio_power_on(ar_sdio); 832bdcd8170SKalle Valo if (ret) 8339df337a1SVivek Natarajan goto err_cfg80211; 834bdcd8170SKalle Valo 835bdcd8170SKalle Valo sdio_claim_host(func); 836bdcd8170SKalle Valo 837bdcd8170SKalle Valo ret = sdio_set_block_size(func, HIF_MBOX_BLOCK_SIZE); 838bdcd8170SKalle Valo if (ret) { 839bdcd8170SKalle Valo ath6kl_err("Set sdio block size %d failed: %d)\n", 840bdcd8170SKalle Valo HIF_MBOX_BLOCK_SIZE, ret); 841bdcd8170SKalle Valo sdio_release_host(func); 842bdcd8170SKalle Valo goto err_off; 843bdcd8170SKalle Valo } 844bdcd8170SKalle Valo 845bdcd8170SKalle Valo sdio_release_host(func); 846bdcd8170SKalle Valo 847bdcd8170SKalle Valo ret = ath6kl_core_init(ar); 848bdcd8170SKalle Valo if (ret) { 849bdcd8170SKalle Valo ath6kl_err("Failed to init ath6kl core\n"); 850bdcd8170SKalle Valo goto err_off; 851bdcd8170SKalle Valo } 852bdcd8170SKalle Valo 853bdcd8170SKalle Valo return ret; 854bdcd8170SKalle Valo 855bdcd8170SKalle Valo err_off: 856bdcd8170SKalle Valo ath6kl_sdio_power_off(ar_sdio); 8579df337a1SVivek Natarajan err_cfg80211: 8589df337a1SVivek Natarajan ath6kl_cfg80211_deinit(ar_sdio->ar); 859bdcd8170SKalle Valo err_dma: 860bdcd8170SKalle Valo kfree(ar_sdio->dma_buffer); 861bdcd8170SKalle Valo err_hif: 862bdcd8170SKalle Valo kfree(ar_sdio); 863bdcd8170SKalle Valo 864bdcd8170SKalle Valo return ret; 865bdcd8170SKalle Valo } 866bdcd8170SKalle Valo 867bdcd8170SKalle Valo static void ath6kl_sdio_remove(struct sdio_func *func) 868bdcd8170SKalle Valo { 869bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio; 870bdcd8170SKalle Valo 871bdcd8170SKalle Valo ar_sdio = sdio_get_drvdata(func); 872bdcd8170SKalle Valo 873bdcd8170SKalle Valo ath6kl_stop_txrx(ar_sdio->ar); 874bdcd8170SKalle Valo cancel_work_sync(&ar_sdio->wr_async_work); 875bdcd8170SKalle Valo 876bdcd8170SKalle Valo ath6kl_unavail_ev(ar_sdio->ar); 877bdcd8170SKalle Valo 878bdcd8170SKalle Valo ath6kl_sdio_power_off(ar_sdio); 879bdcd8170SKalle Valo 880bdcd8170SKalle Valo kfree(ar_sdio->dma_buffer); 881bdcd8170SKalle Valo kfree(ar_sdio); 882bdcd8170SKalle Valo } 883bdcd8170SKalle Valo 884bdcd8170SKalle Valo static const struct sdio_device_id ath6kl_sdio_devices[] = { 885bdcd8170SKalle Valo {SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6003_BASE | 0x0))}, 886bdcd8170SKalle Valo {SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6003_BASE | 0x1))}, 887bdcd8170SKalle Valo {}, 888bdcd8170SKalle Valo }; 889bdcd8170SKalle Valo 890bdcd8170SKalle Valo MODULE_DEVICE_TABLE(sdio, ath6kl_sdio_devices); 891bdcd8170SKalle Valo 892bdcd8170SKalle Valo static struct sdio_driver ath6kl_sdio_driver = { 893bdcd8170SKalle Valo .name = "ath6kl_sdio", 894bdcd8170SKalle Valo .id_table = ath6kl_sdio_devices, 895bdcd8170SKalle Valo .probe = ath6kl_sdio_probe, 896bdcd8170SKalle Valo .remove = ath6kl_sdio_remove, 897bdcd8170SKalle Valo }; 898bdcd8170SKalle Valo 899bdcd8170SKalle Valo static int __init ath6kl_sdio_init(void) 900bdcd8170SKalle Valo { 901bdcd8170SKalle Valo int ret; 902bdcd8170SKalle Valo 903bdcd8170SKalle Valo ret = sdio_register_driver(&ath6kl_sdio_driver); 904bdcd8170SKalle Valo if (ret) 905bdcd8170SKalle Valo ath6kl_err("sdio driver registration failed: %d\n", ret); 906bdcd8170SKalle Valo 907bdcd8170SKalle Valo return ret; 908bdcd8170SKalle Valo } 909bdcd8170SKalle Valo 910bdcd8170SKalle Valo static void __exit ath6kl_sdio_exit(void) 911bdcd8170SKalle Valo { 912bdcd8170SKalle Valo sdio_unregister_driver(&ath6kl_sdio_driver); 913bdcd8170SKalle Valo } 914bdcd8170SKalle Valo 915bdcd8170SKalle Valo module_init(ath6kl_sdio_init); 916bdcd8170SKalle Valo module_exit(ath6kl_sdio_exit); 917bdcd8170SKalle Valo 918bdcd8170SKalle Valo MODULE_AUTHOR("Atheros Communications, Inc."); 919bdcd8170SKalle Valo MODULE_DESCRIPTION("Driver support for Atheros AR600x SDIO devices"); 920bdcd8170SKalle Valo MODULE_LICENSE("Dual BSD/GPL"); 921bdcd8170SKalle Valo 922bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV2_OTP_FILE); 923bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV2_FIRMWARE_FILE); 924bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV2_PATCH_FILE); 925bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV2_BOARD_DATA_FILE); 926bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV2_DEFAULT_BOARD_DATA_FILE); 927bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV3_OTP_FILE); 928bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV3_FIRMWARE_FILE); 929bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV3_PATCH_FILE); 930bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV3_BOARD_DATA_FILE); 931bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV3_DEFAULT_BOARD_DATA_FILE); 932