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" 28bdcd8170SKalle Valo 29bdcd8170SKalle Valo struct ath6kl_sdio { 30bdcd8170SKalle Valo struct sdio_func *func; 31bdcd8170SKalle Valo 32bdcd8170SKalle Valo spinlock_t lock; 33bdcd8170SKalle Valo 34bdcd8170SKalle Valo /* free list */ 35bdcd8170SKalle Valo struct list_head bus_req_freeq; 36bdcd8170SKalle Valo 37bdcd8170SKalle Valo /* available bus requests */ 38bdcd8170SKalle Valo struct bus_request bus_req[BUS_REQUEST_MAX_NUM]; 39bdcd8170SKalle Valo 40bdcd8170SKalle Valo struct ath6kl *ar; 41bdcd8170SKalle Valo u8 *dma_buffer; 42bdcd8170SKalle Valo 43bdcd8170SKalle Valo /* scatter request list head */ 44bdcd8170SKalle Valo struct list_head scat_req; 45bdcd8170SKalle Valo 46bdcd8170SKalle Valo spinlock_t scat_lock; 47bdcd8170SKalle Valo bool is_disabled; 48bdcd8170SKalle Valo atomic_t irq_handling; 49bdcd8170SKalle Valo const struct sdio_device_id *id; 50bdcd8170SKalle Valo struct work_struct wr_async_work; 51bdcd8170SKalle Valo struct list_head wr_asyncq; 52bdcd8170SKalle Valo spinlock_t wr_async_lock; 53bdcd8170SKalle Valo }; 54bdcd8170SKalle Valo 55bdcd8170SKalle Valo #define CMD53_ARG_READ 0 56bdcd8170SKalle Valo #define CMD53_ARG_WRITE 1 57bdcd8170SKalle Valo #define CMD53_ARG_BLOCK_BASIS 1 58bdcd8170SKalle Valo #define CMD53_ARG_FIXED_ADDRESS 0 59bdcd8170SKalle Valo #define CMD53_ARG_INCR_ADDRESS 1 60bdcd8170SKalle Valo 61bdcd8170SKalle Valo static inline struct ath6kl_sdio *ath6kl_sdio_priv(struct ath6kl *ar) 62bdcd8170SKalle Valo { 63bdcd8170SKalle Valo return ar->hif_priv; 64bdcd8170SKalle Valo } 65bdcd8170SKalle Valo 66bdcd8170SKalle Valo /* 67bdcd8170SKalle Valo * Macro to check if DMA buffer is WORD-aligned and DMA-able. 68bdcd8170SKalle Valo * Most host controllers assume the buffer is DMA'able and will 69bdcd8170SKalle Valo * bug-check otherwise (i.e. buffers on the stack). virt_addr_valid 70bdcd8170SKalle Valo * check fails on stack memory. 71bdcd8170SKalle Valo */ 72bdcd8170SKalle Valo static inline bool buf_needs_bounce(u8 *buf) 73bdcd8170SKalle Valo { 74bdcd8170SKalle Valo return ((unsigned long) buf & 0x3) || !virt_addr_valid(buf); 75bdcd8170SKalle Valo } 76bdcd8170SKalle Valo 77bdcd8170SKalle Valo static void ath6kl_sdio_set_mbox_info(struct ath6kl *ar) 78bdcd8170SKalle Valo { 79bdcd8170SKalle Valo struct ath6kl_mbox_info *mbox_info = &ar->mbox_info; 80bdcd8170SKalle Valo 81bdcd8170SKalle Valo /* EP1 has an extended range */ 82bdcd8170SKalle Valo mbox_info->htc_addr = HIF_MBOX_BASE_ADDR; 83bdcd8170SKalle Valo mbox_info->htc_ext_addr = HIF_MBOX0_EXT_BASE_ADDR; 84bdcd8170SKalle Valo mbox_info->htc_ext_sz = HIF_MBOX0_EXT_WIDTH; 85bdcd8170SKalle Valo mbox_info->block_size = HIF_MBOX_BLOCK_SIZE; 86bdcd8170SKalle Valo mbox_info->gmbox_addr = HIF_GMBOX_BASE_ADDR; 87bdcd8170SKalle Valo mbox_info->gmbox_sz = HIF_GMBOX_WIDTH; 88bdcd8170SKalle Valo } 89bdcd8170SKalle Valo 90bdcd8170SKalle Valo static inline void ath6kl_sdio_set_cmd53_arg(u32 *arg, u8 rw, u8 func, 91bdcd8170SKalle Valo u8 mode, u8 opcode, u32 addr, 92bdcd8170SKalle Valo u16 blksz) 93bdcd8170SKalle Valo { 94bdcd8170SKalle Valo *arg = (((rw & 1) << 31) | 95bdcd8170SKalle Valo ((func & 0x7) << 28) | 96bdcd8170SKalle Valo ((mode & 1) << 27) | 97bdcd8170SKalle Valo ((opcode & 1) << 26) | 98bdcd8170SKalle Valo ((addr & 0x1FFFF) << 9) | 99bdcd8170SKalle Valo (blksz & 0x1FF)); 100bdcd8170SKalle Valo } 101bdcd8170SKalle Valo 102bdcd8170SKalle Valo static inline void ath6kl_sdio_set_cmd52_arg(u32 *arg, u8 write, u8 raw, 103bdcd8170SKalle Valo unsigned int address, 104bdcd8170SKalle Valo unsigned char val) 105bdcd8170SKalle Valo { 106bdcd8170SKalle Valo const u8 func = 0; 107bdcd8170SKalle Valo 108bdcd8170SKalle Valo *arg = ((write & 1) << 31) | 109bdcd8170SKalle Valo ((func & 0x7) << 28) | 110bdcd8170SKalle Valo ((raw & 1) << 27) | 111bdcd8170SKalle Valo (1 << 26) | 112bdcd8170SKalle Valo ((address & 0x1FFFF) << 9) | 113bdcd8170SKalle Valo (1 << 8) | 114bdcd8170SKalle Valo (val & 0xFF); 115bdcd8170SKalle Valo } 116bdcd8170SKalle Valo 117bdcd8170SKalle Valo static int ath6kl_sdio_func0_cmd52_wr_byte(struct mmc_card *card, 118bdcd8170SKalle Valo unsigned int address, 119bdcd8170SKalle Valo unsigned char byte) 120bdcd8170SKalle Valo { 121bdcd8170SKalle Valo struct mmc_command io_cmd; 122bdcd8170SKalle Valo 123bdcd8170SKalle Valo memset(&io_cmd, 0, sizeof(io_cmd)); 124bdcd8170SKalle Valo ath6kl_sdio_set_cmd52_arg(&io_cmd.arg, 1, 0, address, byte); 125bdcd8170SKalle Valo io_cmd.opcode = SD_IO_RW_DIRECT; 126bdcd8170SKalle Valo io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC; 127bdcd8170SKalle Valo 128bdcd8170SKalle Valo return mmc_wait_for_cmd(card->host, &io_cmd, 0); 129bdcd8170SKalle Valo } 130bdcd8170SKalle Valo 131da220695SVasanthakumar Thiagarajan static int ath6kl_sdio_io(struct sdio_func *func, u32 request, u32 addr, 132da220695SVasanthakumar Thiagarajan u8 *buf, u32 len) 133da220695SVasanthakumar Thiagarajan { 134da220695SVasanthakumar Thiagarajan int ret = 0; 135da220695SVasanthakumar Thiagarajan 136da220695SVasanthakumar Thiagarajan if (request & HIF_WRITE) { 137da220695SVasanthakumar Thiagarajan if (addr >= HIF_MBOX_BASE_ADDR && 138da220695SVasanthakumar Thiagarajan addr <= HIF_MBOX_END_ADDR) 139da220695SVasanthakumar Thiagarajan addr += (HIF_MBOX_WIDTH - len); 140da220695SVasanthakumar Thiagarajan 141da220695SVasanthakumar Thiagarajan if (addr == HIF_MBOX0_EXT_BASE_ADDR) 142da220695SVasanthakumar Thiagarajan addr += HIF_MBOX0_EXT_WIDTH - len; 143da220695SVasanthakumar Thiagarajan 144da220695SVasanthakumar Thiagarajan if (request & HIF_FIXED_ADDRESS) 145da220695SVasanthakumar Thiagarajan ret = sdio_writesb(func, addr, buf, len); 146da220695SVasanthakumar Thiagarajan else 147da220695SVasanthakumar Thiagarajan ret = sdio_memcpy_toio(func, addr, buf, len); 148da220695SVasanthakumar Thiagarajan } else { 149da220695SVasanthakumar Thiagarajan if (request & HIF_FIXED_ADDRESS) 150da220695SVasanthakumar Thiagarajan ret = sdio_readsb(func, buf, addr, len); 151da220695SVasanthakumar Thiagarajan else 152da220695SVasanthakumar Thiagarajan ret = sdio_memcpy_fromio(func, buf, addr, len); 153da220695SVasanthakumar Thiagarajan } 154da220695SVasanthakumar Thiagarajan 155da220695SVasanthakumar Thiagarajan return ret; 156da220695SVasanthakumar Thiagarajan } 157da220695SVasanthakumar Thiagarajan 158bdcd8170SKalle Valo static struct bus_request *ath6kl_sdio_alloc_busreq(struct ath6kl_sdio *ar_sdio) 159bdcd8170SKalle Valo { 160bdcd8170SKalle Valo struct bus_request *bus_req; 161bdcd8170SKalle Valo unsigned long flag; 162bdcd8170SKalle Valo 163bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->lock, flag); 164bdcd8170SKalle Valo 165bdcd8170SKalle Valo if (list_empty(&ar_sdio->bus_req_freeq)) { 166bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->lock, flag); 167bdcd8170SKalle Valo return NULL; 168bdcd8170SKalle Valo } 169bdcd8170SKalle Valo 170bdcd8170SKalle Valo bus_req = list_first_entry(&ar_sdio->bus_req_freeq, 171bdcd8170SKalle Valo struct bus_request, list); 172bdcd8170SKalle Valo list_del(&bus_req->list); 173bdcd8170SKalle Valo 174bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->lock, flag); 175bdcd8170SKalle Valo ath6kl_dbg(ATH6KL_DBG_TRC, "%s: bus request 0x%p\n", __func__, bus_req); 176bdcd8170SKalle Valo 177bdcd8170SKalle Valo return bus_req; 178bdcd8170SKalle Valo } 179bdcd8170SKalle Valo 180bdcd8170SKalle Valo static void ath6kl_sdio_free_bus_req(struct ath6kl_sdio *ar_sdio, 181bdcd8170SKalle Valo struct bus_request *bus_req) 182bdcd8170SKalle Valo { 183bdcd8170SKalle Valo unsigned long flag; 184bdcd8170SKalle Valo 185bdcd8170SKalle Valo ath6kl_dbg(ATH6KL_DBG_TRC, "%s: bus request 0x%p\n", __func__, bus_req); 186bdcd8170SKalle Valo 187bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->lock, flag); 188bdcd8170SKalle Valo list_add_tail(&bus_req->list, &ar_sdio->bus_req_freeq); 189bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->lock, flag); 190bdcd8170SKalle Valo } 191bdcd8170SKalle Valo 192bdcd8170SKalle Valo static void ath6kl_sdio_setup_scat_data(struct hif_scatter_req *scat_req, 193bdcd8170SKalle Valo struct mmc_data *data) 194bdcd8170SKalle Valo { 195bdcd8170SKalle Valo struct scatterlist *sg; 196bdcd8170SKalle Valo int i; 197bdcd8170SKalle Valo 198bdcd8170SKalle Valo data->blksz = HIF_MBOX_BLOCK_SIZE; 199bdcd8170SKalle Valo data->blocks = scat_req->len / HIF_MBOX_BLOCK_SIZE; 200bdcd8170SKalle Valo 201bdcd8170SKalle Valo ath6kl_dbg(ATH6KL_DBG_SCATTER, 202bdcd8170SKalle Valo "hif-scatter: (%s) addr: 0x%X, (block len: %d, block count: %d) , (tot:%d,sg:%d)\n", 203bdcd8170SKalle Valo (scat_req->req & HIF_WRITE) ? "WR" : "RD", scat_req->addr, 204bdcd8170SKalle Valo data->blksz, data->blocks, scat_req->len, 205bdcd8170SKalle Valo scat_req->scat_entries); 206bdcd8170SKalle Valo 207bdcd8170SKalle Valo data->flags = (scat_req->req & HIF_WRITE) ? MMC_DATA_WRITE : 208bdcd8170SKalle Valo MMC_DATA_READ; 209bdcd8170SKalle Valo 210bdcd8170SKalle Valo /* fill SG entries */ 211d4df7890SVasanthakumar Thiagarajan sg = scat_req->sgentries; 212bdcd8170SKalle Valo sg_init_table(sg, scat_req->scat_entries); 213bdcd8170SKalle Valo 214bdcd8170SKalle Valo /* assemble SG list */ 215bdcd8170SKalle Valo for (i = 0; i < scat_req->scat_entries; i++, sg++) { 216bdcd8170SKalle Valo if ((unsigned long)scat_req->scat_list[i].buf & 0x3) 217bdcd8170SKalle Valo /* 218bdcd8170SKalle Valo * Some scatter engines can handle unaligned 219bdcd8170SKalle Valo * buffers, print this as informational only. 220bdcd8170SKalle Valo */ 221bdcd8170SKalle Valo ath6kl_dbg(ATH6KL_DBG_SCATTER, 222bdcd8170SKalle Valo "(%s) scatter buffer is unaligned 0x%p\n", 223bdcd8170SKalle Valo scat_req->req & HIF_WRITE ? "WR" : "RD", 224bdcd8170SKalle Valo scat_req->scat_list[i].buf); 225bdcd8170SKalle Valo 226bdcd8170SKalle Valo ath6kl_dbg(ATH6KL_DBG_SCATTER, "%d: addr:0x%p, len:%d\n", 227bdcd8170SKalle Valo i, scat_req->scat_list[i].buf, 228bdcd8170SKalle Valo scat_req->scat_list[i].len); 229bdcd8170SKalle Valo 230bdcd8170SKalle Valo sg_set_buf(sg, scat_req->scat_list[i].buf, 231bdcd8170SKalle Valo scat_req->scat_list[i].len); 232bdcd8170SKalle Valo } 233bdcd8170SKalle Valo 234bdcd8170SKalle Valo /* set scatter-gather table for request */ 235d4df7890SVasanthakumar Thiagarajan data->sg = scat_req->sgentries; 236bdcd8170SKalle Valo data->sg_len = scat_req->scat_entries; 237bdcd8170SKalle Valo } 238bdcd8170SKalle Valo 239bdcd8170SKalle Valo static int ath6kl_sdio_scat_rw(struct ath6kl_sdio *ar_sdio, 240bdcd8170SKalle Valo struct bus_request *req) 241bdcd8170SKalle Valo { 242bdcd8170SKalle Valo struct mmc_request mmc_req; 243bdcd8170SKalle Valo struct mmc_command cmd; 244bdcd8170SKalle Valo struct mmc_data data; 245bdcd8170SKalle Valo struct hif_scatter_req *scat_req; 246bdcd8170SKalle Valo u8 opcode, rw; 247348a8fbcSVasanthakumar Thiagarajan int status, len; 248bdcd8170SKalle Valo 249bdcd8170SKalle Valo scat_req = req->scat_req; 250bdcd8170SKalle Valo 251348a8fbcSVasanthakumar Thiagarajan if (scat_req->virt_scat) { 252348a8fbcSVasanthakumar Thiagarajan len = scat_req->len; 253348a8fbcSVasanthakumar Thiagarajan if (scat_req->req & HIF_BLOCK_BASIS) 254348a8fbcSVasanthakumar Thiagarajan len = round_down(len, HIF_MBOX_BLOCK_SIZE); 255348a8fbcSVasanthakumar Thiagarajan 256348a8fbcSVasanthakumar Thiagarajan status = ath6kl_sdio_io(ar_sdio->func, scat_req->req, 257348a8fbcSVasanthakumar Thiagarajan scat_req->addr, scat_req->virt_dma_buf, 258348a8fbcSVasanthakumar Thiagarajan len); 259348a8fbcSVasanthakumar Thiagarajan goto scat_complete; 260348a8fbcSVasanthakumar Thiagarajan } 261348a8fbcSVasanthakumar Thiagarajan 262bdcd8170SKalle Valo memset(&mmc_req, 0, sizeof(struct mmc_request)); 263bdcd8170SKalle Valo memset(&cmd, 0, sizeof(struct mmc_command)); 264bdcd8170SKalle Valo memset(&data, 0, sizeof(struct mmc_data)); 265bdcd8170SKalle Valo 266d4df7890SVasanthakumar Thiagarajan ath6kl_sdio_setup_scat_data(scat_req, &data); 267bdcd8170SKalle Valo 268bdcd8170SKalle Valo opcode = (scat_req->req & HIF_FIXED_ADDRESS) ? 269bdcd8170SKalle Valo CMD53_ARG_FIXED_ADDRESS : CMD53_ARG_INCR_ADDRESS; 270bdcd8170SKalle Valo 271bdcd8170SKalle Valo rw = (scat_req->req & HIF_WRITE) ? CMD53_ARG_WRITE : CMD53_ARG_READ; 272bdcd8170SKalle Valo 273bdcd8170SKalle Valo /* Fixup the address so that the last byte will fall on MBOX EOM */ 274bdcd8170SKalle Valo if (scat_req->req & HIF_WRITE) { 275bdcd8170SKalle Valo if (scat_req->addr == HIF_MBOX_BASE_ADDR) 276bdcd8170SKalle Valo scat_req->addr += HIF_MBOX_WIDTH - scat_req->len; 277bdcd8170SKalle Valo else 278bdcd8170SKalle Valo /* Uses extended address range */ 279bdcd8170SKalle Valo scat_req->addr += HIF_MBOX0_EXT_WIDTH - scat_req->len; 280bdcd8170SKalle Valo } 281bdcd8170SKalle Valo 282bdcd8170SKalle Valo /* set command argument */ 283bdcd8170SKalle Valo ath6kl_sdio_set_cmd53_arg(&cmd.arg, rw, ar_sdio->func->num, 284bdcd8170SKalle Valo CMD53_ARG_BLOCK_BASIS, opcode, scat_req->addr, 285bdcd8170SKalle Valo data.blocks); 286bdcd8170SKalle Valo 287bdcd8170SKalle Valo cmd.opcode = SD_IO_RW_EXTENDED; 288bdcd8170SKalle Valo cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC; 289bdcd8170SKalle Valo 290bdcd8170SKalle Valo mmc_req.cmd = &cmd; 291bdcd8170SKalle Valo mmc_req.data = &data; 292bdcd8170SKalle Valo 293bdcd8170SKalle Valo mmc_set_data_timeout(&data, ar_sdio->func->card); 294bdcd8170SKalle Valo /* synchronous call to process request */ 295bdcd8170SKalle Valo mmc_wait_for_req(ar_sdio->func->card->host, &mmc_req); 296bdcd8170SKalle Valo 297bdcd8170SKalle Valo status = cmd.error ? cmd.error : data.error; 298348a8fbcSVasanthakumar Thiagarajan 299348a8fbcSVasanthakumar Thiagarajan scat_complete: 300bdcd8170SKalle Valo scat_req->status = status; 301bdcd8170SKalle Valo 302bdcd8170SKalle Valo if (scat_req->status) 303bdcd8170SKalle Valo ath6kl_err("Scatter write request failed:%d\n", 304bdcd8170SKalle Valo scat_req->status); 305bdcd8170SKalle Valo 306bdcd8170SKalle Valo if (scat_req->req & HIF_ASYNCHRONOUS) 307e041c7f9SVasanthakumar Thiagarajan scat_req->complete(ar_sdio->ar->htc_target, scat_req); 308bdcd8170SKalle Valo 309bdcd8170SKalle Valo return status; 310bdcd8170SKalle Valo } 311bdcd8170SKalle Valo 3123df505adSVasanthakumar Thiagarajan static int ath6kl_sdio_alloc_prep_scat_req(struct ath6kl_sdio *ar_sdio, 3133df505adSVasanthakumar Thiagarajan int n_scat_entry, int n_scat_req, 3143df505adSVasanthakumar Thiagarajan bool virt_scat) 3153df505adSVasanthakumar Thiagarajan { 3163df505adSVasanthakumar Thiagarajan struct hif_scatter_req *s_req; 3173df505adSVasanthakumar Thiagarajan struct bus_request *bus_req; 318cfeab10bSVasanthakumar Thiagarajan int i, scat_req_sz, scat_list_sz, sg_sz, buf_sz; 319cfeab10bSVasanthakumar Thiagarajan u8 *virt_buf; 3203df505adSVasanthakumar Thiagarajan 3213df505adSVasanthakumar Thiagarajan scat_list_sz = (n_scat_entry - 1) * sizeof(struct hif_scatter_item); 3223df505adSVasanthakumar Thiagarajan scat_req_sz = sizeof(*s_req) + scat_list_sz; 3233df505adSVasanthakumar Thiagarajan 3243df505adSVasanthakumar Thiagarajan if (!virt_scat) 3253df505adSVasanthakumar Thiagarajan sg_sz = sizeof(struct scatterlist) * n_scat_entry; 326cfeab10bSVasanthakumar Thiagarajan else 327cfeab10bSVasanthakumar Thiagarajan buf_sz = 2 * L1_CACHE_BYTES + 328cfeab10bSVasanthakumar Thiagarajan ATH6KL_MAX_TRANSFER_SIZE_PER_SCATTER; 3293df505adSVasanthakumar Thiagarajan 3303df505adSVasanthakumar Thiagarajan for (i = 0; i < n_scat_req; i++) { 3313df505adSVasanthakumar Thiagarajan /* allocate the scatter request */ 3323df505adSVasanthakumar Thiagarajan s_req = kzalloc(scat_req_sz, GFP_KERNEL); 3333df505adSVasanthakumar Thiagarajan if (!s_req) 3343df505adSVasanthakumar Thiagarajan return -ENOMEM; 3353df505adSVasanthakumar Thiagarajan 336cfeab10bSVasanthakumar Thiagarajan if (virt_scat) { 337cfeab10bSVasanthakumar Thiagarajan virt_buf = kzalloc(buf_sz, GFP_KERNEL); 338cfeab10bSVasanthakumar Thiagarajan if (!virt_buf) { 339cfeab10bSVasanthakumar Thiagarajan kfree(s_req); 340cfeab10bSVasanthakumar Thiagarajan return -ENOMEM; 341cfeab10bSVasanthakumar Thiagarajan } 342cfeab10bSVasanthakumar Thiagarajan 343cfeab10bSVasanthakumar Thiagarajan s_req->virt_dma_buf = 344cfeab10bSVasanthakumar Thiagarajan (u8 *)L1_CACHE_ALIGN((unsigned long)virt_buf); 345cfeab10bSVasanthakumar Thiagarajan } else { 3463df505adSVasanthakumar Thiagarajan /* allocate sglist */ 3473df505adSVasanthakumar Thiagarajan s_req->sgentries = kzalloc(sg_sz, GFP_KERNEL); 3483df505adSVasanthakumar Thiagarajan 3493df505adSVasanthakumar Thiagarajan if (!s_req->sgentries) { 3503df505adSVasanthakumar Thiagarajan kfree(s_req); 3513df505adSVasanthakumar Thiagarajan return -ENOMEM; 3523df505adSVasanthakumar Thiagarajan } 3533df505adSVasanthakumar Thiagarajan } 3543df505adSVasanthakumar Thiagarajan 3553df505adSVasanthakumar Thiagarajan /* allocate a bus request for this scatter request */ 3563df505adSVasanthakumar Thiagarajan bus_req = ath6kl_sdio_alloc_busreq(ar_sdio); 3573df505adSVasanthakumar Thiagarajan if (!bus_req) { 3583df505adSVasanthakumar Thiagarajan kfree(s_req->sgentries); 359cfeab10bSVasanthakumar Thiagarajan kfree(s_req->virt_dma_buf); 3603df505adSVasanthakumar Thiagarajan kfree(s_req); 3613df505adSVasanthakumar Thiagarajan return -ENOMEM; 3623df505adSVasanthakumar Thiagarajan } 3633df505adSVasanthakumar Thiagarajan 3643df505adSVasanthakumar Thiagarajan /* assign the scatter request to this bus request */ 3653df505adSVasanthakumar Thiagarajan bus_req->scat_req = s_req; 3663df505adSVasanthakumar Thiagarajan s_req->busrequest = bus_req; 3673df505adSVasanthakumar Thiagarajan 3684a005c3eSVasanthakumar Thiagarajan s_req->virt_scat = virt_scat; 3694a005c3eSVasanthakumar Thiagarajan 3703df505adSVasanthakumar Thiagarajan /* add it to the scatter pool */ 3713df505adSVasanthakumar Thiagarajan hif_scatter_req_add(ar_sdio->ar, s_req); 3723df505adSVasanthakumar Thiagarajan } 3733df505adSVasanthakumar Thiagarajan 3743df505adSVasanthakumar Thiagarajan return 0; 3753df505adSVasanthakumar Thiagarajan } 3763df505adSVasanthakumar Thiagarajan 377bdcd8170SKalle Valo static int ath6kl_sdio_read_write_sync(struct ath6kl *ar, u32 addr, u8 *buf, 378bdcd8170SKalle Valo u32 len, u32 request) 379bdcd8170SKalle Valo { 380bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 381bdcd8170SKalle Valo u8 *tbuf = NULL; 382bdcd8170SKalle Valo int ret; 383bdcd8170SKalle Valo bool bounced = false; 384bdcd8170SKalle Valo 385bdcd8170SKalle Valo if (request & HIF_BLOCK_BASIS) 386bdcd8170SKalle Valo len = round_down(len, HIF_MBOX_BLOCK_SIZE); 387bdcd8170SKalle Valo 388bdcd8170SKalle Valo if (buf_needs_bounce(buf)) { 389bdcd8170SKalle Valo if (!ar_sdio->dma_buffer) 390bdcd8170SKalle Valo return -ENOMEM; 391bdcd8170SKalle Valo tbuf = ar_sdio->dma_buffer; 392bdcd8170SKalle Valo memcpy(tbuf, buf, len); 393bdcd8170SKalle Valo bounced = true; 394bdcd8170SKalle Valo } else 395bdcd8170SKalle Valo tbuf = buf; 396bdcd8170SKalle Valo 397bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 398da220695SVasanthakumar Thiagarajan ret = ath6kl_sdio_io(ar_sdio->func, request, addr, tbuf, len); 399da220695SVasanthakumar Thiagarajan if ((request & HIF_READ) && bounced) 400bdcd8170SKalle Valo memcpy(buf, tbuf, len); 401bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 402bdcd8170SKalle Valo 403bdcd8170SKalle Valo return ret; 404bdcd8170SKalle Valo } 405bdcd8170SKalle Valo 406bdcd8170SKalle Valo static void __ath6kl_sdio_write_async(struct ath6kl_sdio *ar_sdio, 407bdcd8170SKalle Valo struct bus_request *req) 408bdcd8170SKalle Valo { 409bdcd8170SKalle Valo if (req->scat_req) 410bdcd8170SKalle Valo ath6kl_sdio_scat_rw(ar_sdio, req); 411bdcd8170SKalle Valo else { 412bdcd8170SKalle Valo void *context; 413bdcd8170SKalle Valo int status; 414bdcd8170SKalle Valo 415bdcd8170SKalle Valo status = ath6kl_sdio_read_write_sync(ar_sdio->ar, req->address, 416bdcd8170SKalle Valo req->buffer, req->length, 417bdcd8170SKalle Valo req->request); 418bdcd8170SKalle Valo context = req->packet; 419bdcd8170SKalle Valo ath6kl_sdio_free_bus_req(ar_sdio, req); 420bdcd8170SKalle Valo ath6kldev_rw_comp_handler(context, status); 421bdcd8170SKalle Valo } 422bdcd8170SKalle Valo } 423bdcd8170SKalle Valo 424bdcd8170SKalle Valo static void ath6kl_sdio_write_async_work(struct work_struct *work) 425bdcd8170SKalle Valo { 426bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio; 427bdcd8170SKalle Valo unsigned long flags; 428bdcd8170SKalle Valo struct bus_request *req, *tmp_req; 429bdcd8170SKalle Valo 430bdcd8170SKalle Valo ar_sdio = container_of(work, struct ath6kl_sdio, wr_async_work); 431bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 432bdcd8170SKalle Valo 433bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->wr_async_lock, flags); 434bdcd8170SKalle Valo list_for_each_entry_safe(req, tmp_req, &ar_sdio->wr_asyncq, list) { 435bdcd8170SKalle Valo list_del(&req->list); 436bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags); 437bdcd8170SKalle Valo __ath6kl_sdio_write_async(ar_sdio, req); 438bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->wr_async_lock, flags); 439bdcd8170SKalle Valo } 440bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags); 441bdcd8170SKalle Valo 442bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 443bdcd8170SKalle Valo } 444bdcd8170SKalle Valo 445bdcd8170SKalle Valo static void ath6kl_sdio_irq_handler(struct sdio_func *func) 446bdcd8170SKalle Valo { 447bdcd8170SKalle Valo int status; 448bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio; 449bdcd8170SKalle Valo 450bdcd8170SKalle Valo ar_sdio = sdio_get_drvdata(func); 451bdcd8170SKalle Valo atomic_set(&ar_sdio->irq_handling, 1); 452bdcd8170SKalle Valo 453bdcd8170SKalle Valo /* 454bdcd8170SKalle Valo * Release the host during interrups so we can pick it back up when 455bdcd8170SKalle Valo * we process commands. 456bdcd8170SKalle Valo */ 457bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 458bdcd8170SKalle Valo 459bdcd8170SKalle Valo status = ath6kldev_intr_bh_handler(ar_sdio->ar); 460bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 461bdcd8170SKalle Valo atomic_set(&ar_sdio->irq_handling, 0); 462bdcd8170SKalle Valo WARN_ON(status && status != -ECANCELED); 463bdcd8170SKalle Valo } 464bdcd8170SKalle Valo 465bdcd8170SKalle Valo static int ath6kl_sdio_power_on(struct ath6kl_sdio *ar_sdio) 466bdcd8170SKalle Valo { 467bdcd8170SKalle Valo struct sdio_func *func = ar_sdio->func; 468bdcd8170SKalle Valo int ret = 0; 469bdcd8170SKalle Valo 470bdcd8170SKalle Valo if (!ar_sdio->is_disabled) 471bdcd8170SKalle Valo return 0; 472bdcd8170SKalle Valo 473bdcd8170SKalle Valo sdio_claim_host(func); 474bdcd8170SKalle Valo 475bdcd8170SKalle Valo ret = sdio_enable_func(func); 476bdcd8170SKalle Valo if (ret) { 477bdcd8170SKalle Valo ath6kl_err("Unable to enable sdio func: %d)\n", ret); 478bdcd8170SKalle Valo sdio_release_host(func); 479bdcd8170SKalle Valo return ret; 480bdcd8170SKalle Valo } 481bdcd8170SKalle Valo 482bdcd8170SKalle Valo sdio_release_host(func); 483bdcd8170SKalle Valo 484bdcd8170SKalle Valo /* 485bdcd8170SKalle Valo * Wait for hardware to initialise. It should take a lot less than 486bdcd8170SKalle Valo * 10 ms but let's be conservative here. 487bdcd8170SKalle Valo */ 488bdcd8170SKalle Valo msleep(10); 489bdcd8170SKalle Valo 490bdcd8170SKalle Valo ar_sdio->is_disabled = false; 491bdcd8170SKalle Valo 492bdcd8170SKalle Valo return ret; 493bdcd8170SKalle Valo } 494bdcd8170SKalle Valo 495bdcd8170SKalle Valo static int ath6kl_sdio_power_off(struct ath6kl_sdio *ar_sdio) 496bdcd8170SKalle Valo { 497bdcd8170SKalle Valo int ret; 498bdcd8170SKalle Valo 499bdcd8170SKalle Valo if (ar_sdio->is_disabled) 500bdcd8170SKalle Valo return 0; 501bdcd8170SKalle Valo 502bdcd8170SKalle Valo /* Disable the card */ 503bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 504bdcd8170SKalle Valo ret = sdio_disable_func(ar_sdio->func); 505bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 506bdcd8170SKalle Valo 507bdcd8170SKalle Valo if (ret) 508bdcd8170SKalle Valo return ret; 509bdcd8170SKalle Valo 510bdcd8170SKalle Valo ar_sdio->is_disabled = true; 511bdcd8170SKalle Valo 512bdcd8170SKalle Valo return ret; 513bdcd8170SKalle Valo } 514bdcd8170SKalle Valo 515bdcd8170SKalle Valo static int ath6kl_sdio_write_async(struct ath6kl *ar, u32 address, u8 *buffer, 516bdcd8170SKalle Valo u32 length, u32 request, 517bdcd8170SKalle Valo struct htc_packet *packet) 518bdcd8170SKalle Valo { 519bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 520bdcd8170SKalle Valo struct bus_request *bus_req; 521bdcd8170SKalle Valo unsigned long flags; 522bdcd8170SKalle Valo 523bdcd8170SKalle Valo bus_req = ath6kl_sdio_alloc_busreq(ar_sdio); 524bdcd8170SKalle Valo 525bdcd8170SKalle Valo if (!bus_req) 526bdcd8170SKalle Valo return -ENOMEM; 527bdcd8170SKalle Valo 528bdcd8170SKalle Valo bus_req->address = address; 529bdcd8170SKalle Valo bus_req->buffer = buffer; 530bdcd8170SKalle Valo bus_req->length = length; 531bdcd8170SKalle Valo bus_req->request = request; 532bdcd8170SKalle Valo bus_req->packet = packet; 533bdcd8170SKalle Valo 534bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->wr_async_lock, flags); 535bdcd8170SKalle Valo list_add_tail(&bus_req->list, &ar_sdio->wr_asyncq); 536bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags); 537bdcd8170SKalle Valo queue_work(ar->ath6kl_wq, &ar_sdio->wr_async_work); 538bdcd8170SKalle Valo 539bdcd8170SKalle Valo return 0; 540bdcd8170SKalle Valo } 541bdcd8170SKalle Valo 542bdcd8170SKalle Valo static void ath6kl_sdio_irq_enable(struct ath6kl *ar) 543bdcd8170SKalle Valo { 544bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 545bdcd8170SKalle Valo int ret; 546bdcd8170SKalle Valo 547bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 548bdcd8170SKalle Valo 549bdcd8170SKalle Valo /* Register the isr */ 550bdcd8170SKalle Valo ret = sdio_claim_irq(ar_sdio->func, ath6kl_sdio_irq_handler); 551bdcd8170SKalle Valo if (ret) 552bdcd8170SKalle Valo ath6kl_err("Failed to claim sdio irq: %d\n", ret); 553bdcd8170SKalle Valo 554bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 555bdcd8170SKalle Valo } 556bdcd8170SKalle Valo 557bdcd8170SKalle Valo static void ath6kl_sdio_irq_disable(struct ath6kl *ar) 558bdcd8170SKalle Valo { 559bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 560bdcd8170SKalle Valo int ret; 561bdcd8170SKalle Valo 562bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 563bdcd8170SKalle Valo 564bdcd8170SKalle Valo /* Mask our function IRQ */ 565bdcd8170SKalle Valo while (atomic_read(&ar_sdio->irq_handling)) { 566bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 567bdcd8170SKalle Valo schedule_timeout(HZ / 10); 568bdcd8170SKalle Valo sdio_claim_host(ar_sdio->func); 569bdcd8170SKalle Valo } 570bdcd8170SKalle Valo 571bdcd8170SKalle Valo ret = sdio_release_irq(ar_sdio->func); 572bdcd8170SKalle Valo if (ret) 573bdcd8170SKalle Valo ath6kl_err("Failed to release sdio irq: %d\n", ret); 574bdcd8170SKalle Valo 575bdcd8170SKalle Valo sdio_release_host(ar_sdio->func); 576bdcd8170SKalle Valo } 577bdcd8170SKalle Valo 578bdcd8170SKalle Valo static struct hif_scatter_req *ath6kl_sdio_scatter_req_get(struct ath6kl *ar) 579bdcd8170SKalle Valo { 580bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 581bdcd8170SKalle Valo struct hif_scatter_req *node = NULL; 582bdcd8170SKalle Valo unsigned long flag; 583bdcd8170SKalle Valo 584bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->scat_lock, flag); 585bdcd8170SKalle Valo 586bdcd8170SKalle Valo if (!list_empty(&ar_sdio->scat_req)) { 587bdcd8170SKalle Valo node = list_first_entry(&ar_sdio->scat_req, 588bdcd8170SKalle Valo struct hif_scatter_req, list); 589bdcd8170SKalle Valo list_del(&node->list); 590bdcd8170SKalle Valo } 591bdcd8170SKalle Valo 592bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->scat_lock, flag); 593bdcd8170SKalle Valo 594bdcd8170SKalle Valo return node; 595bdcd8170SKalle Valo } 596bdcd8170SKalle Valo 597bdcd8170SKalle Valo static void ath6kl_sdio_scatter_req_add(struct ath6kl *ar, 598bdcd8170SKalle Valo struct hif_scatter_req *s_req) 599bdcd8170SKalle Valo { 600bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 601bdcd8170SKalle Valo unsigned long flag; 602bdcd8170SKalle Valo 603bdcd8170SKalle Valo spin_lock_irqsave(&ar_sdio->scat_lock, flag); 604bdcd8170SKalle Valo 605bdcd8170SKalle Valo list_add_tail(&s_req->list, &ar_sdio->scat_req); 606bdcd8170SKalle Valo 607bdcd8170SKalle Valo spin_unlock_irqrestore(&ar_sdio->scat_lock, flag); 608bdcd8170SKalle Valo 609bdcd8170SKalle Valo } 610bdcd8170SKalle Valo 611c630d18aSVasanthakumar Thiagarajan /* scatter gather read write request */ 612c630d18aSVasanthakumar Thiagarajan static int ath6kl_sdio_async_rw_scatter(struct ath6kl *ar, 613c630d18aSVasanthakumar Thiagarajan struct hif_scatter_req *scat_req) 614c630d18aSVasanthakumar Thiagarajan { 615c630d18aSVasanthakumar Thiagarajan struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 616c630d18aSVasanthakumar Thiagarajan u32 request = scat_req->req; 617c630d18aSVasanthakumar Thiagarajan int status = 0; 618c630d18aSVasanthakumar Thiagarajan unsigned long flags; 619c630d18aSVasanthakumar Thiagarajan 620c630d18aSVasanthakumar Thiagarajan if (!scat_req->len) 621c630d18aSVasanthakumar Thiagarajan return -EINVAL; 622c630d18aSVasanthakumar Thiagarajan 623c630d18aSVasanthakumar Thiagarajan ath6kl_dbg(ATH6KL_DBG_SCATTER, 624c630d18aSVasanthakumar Thiagarajan "hif-scatter: total len: %d scatter entries: %d\n", 625c630d18aSVasanthakumar Thiagarajan scat_req->len, scat_req->scat_entries); 626c630d18aSVasanthakumar Thiagarajan 627c630d18aSVasanthakumar Thiagarajan if (request & HIF_SYNCHRONOUS) { 628c630d18aSVasanthakumar Thiagarajan sdio_claim_host(ar_sdio->func); 629d4df7890SVasanthakumar Thiagarajan status = ath6kl_sdio_scat_rw(ar_sdio, scat_req->busrequest); 630c630d18aSVasanthakumar Thiagarajan sdio_release_host(ar_sdio->func); 631c630d18aSVasanthakumar Thiagarajan } else { 632c630d18aSVasanthakumar Thiagarajan spin_lock_irqsave(&ar_sdio->wr_async_lock, flags); 633d4df7890SVasanthakumar Thiagarajan list_add_tail(&scat_req->busrequest->list, &ar_sdio->wr_asyncq); 634c630d18aSVasanthakumar Thiagarajan spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags); 635c630d18aSVasanthakumar Thiagarajan queue_work(ar->ath6kl_wq, &ar_sdio->wr_async_work); 636c630d18aSVasanthakumar Thiagarajan } 637c630d18aSVasanthakumar Thiagarajan 638c630d18aSVasanthakumar Thiagarajan return status; 639c630d18aSVasanthakumar Thiagarajan } 640c630d18aSVasanthakumar Thiagarajan 64118a0f93eSVasanthakumar Thiagarajan /* clean up scatter support */ 64218a0f93eSVasanthakumar Thiagarajan static void ath6kl_sdio_cleanup_scatter(struct ath6kl *ar) 64318a0f93eSVasanthakumar Thiagarajan { 64418a0f93eSVasanthakumar Thiagarajan struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 64518a0f93eSVasanthakumar Thiagarajan struct hif_scatter_req *s_req, *tmp_req; 64618a0f93eSVasanthakumar Thiagarajan unsigned long flag; 64718a0f93eSVasanthakumar Thiagarajan 64818a0f93eSVasanthakumar Thiagarajan /* empty the free list */ 64918a0f93eSVasanthakumar Thiagarajan spin_lock_irqsave(&ar_sdio->scat_lock, flag); 65018a0f93eSVasanthakumar Thiagarajan list_for_each_entry_safe(s_req, tmp_req, &ar_sdio->scat_req, list) { 65118a0f93eSVasanthakumar Thiagarajan list_del(&s_req->list); 65218a0f93eSVasanthakumar Thiagarajan spin_unlock_irqrestore(&ar_sdio->scat_lock, flag); 65318a0f93eSVasanthakumar Thiagarajan 65418a0f93eSVasanthakumar Thiagarajan if (s_req->busrequest) 65518a0f93eSVasanthakumar Thiagarajan ath6kl_sdio_free_bus_req(ar_sdio, s_req->busrequest); 65618a0f93eSVasanthakumar Thiagarajan kfree(s_req->virt_dma_buf); 65718a0f93eSVasanthakumar Thiagarajan kfree(s_req->sgentries); 65818a0f93eSVasanthakumar Thiagarajan kfree(s_req); 65918a0f93eSVasanthakumar Thiagarajan 66018a0f93eSVasanthakumar Thiagarajan spin_lock_irqsave(&ar_sdio->scat_lock, flag); 66118a0f93eSVasanthakumar Thiagarajan } 66218a0f93eSVasanthakumar Thiagarajan spin_unlock_irqrestore(&ar_sdio->scat_lock, flag); 66318a0f93eSVasanthakumar Thiagarajan } 66418a0f93eSVasanthakumar Thiagarajan 66518a0f93eSVasanthakumar Thiagarajan /* setup of HIF scatter resources */ 66650745af7SVasanthakumar Thiagarajan static int ath6kl_sdio_enable_scatter(struct ath6kl *ar) 66718a0f93eSVasanthakumar Thiagarajan { 66818a0f93eSVasanthakumar Thiagarajan struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 66950745af7SVasanthakumar Thiagarajan struct htc_target *target = ar->htc_target; 670cfeab10bSVasanthakumar Thiagarajan int ret; 671cfeab10bSVasanthakumar Thiagarajan bool virt_scat = false; 67218a0f93eSVasanthakumar Thiagarajan 67318a0f93eSVasanthakumar Thiagarajan /* check if host supports scatter and it meets our requirements */ 67418a0f93eSVasanthakumar Thiagarajan if (ar_sdio->func->card->host->max_segs < MAX_SCATTER_ENTRIES_PER_REQ) { 675cfeab10bSVasanthakumar Thiagarajan ath6kl_err("host only supports scatter of :%d entries, need: %d\n", 67618a0f93eSVasanthakumar Thiagarajan ar_sdio->func->card->host->max_segs, 67718a0f93eSVasanthakumar Thiagarajan MAX_SCATTER_ENTRIES_PER_REQ); 678cfeab10bSVasanthakumar Thiagarajan virt_scat = true; 67918a0f93eSVasanthakumar Thiagarajan } 68018a0f93eSVasanthakumar Thiagarajan 681cfeab10bSVasanthakumar Thiagarajan if (!virt_scat) { 68218a0f93eSVasanthakumar Thiagarajan ret = ath6kl_sdio_alloc_prep_scat_req(ar_sdio, 68318a0f93eSVasanthakumar Thiagarajan MAX_SCATTER_ENTRIES_PER_REQ, 684cfeab10bSVasanthakumar Thiagarajan MAX_SCATTER_REQUESTS, virt_scat); 685cfeab10bSVasanthakumar Thiagarajan 686cfeab10bSVasanthakumar Thiagarajan if (!ret) { 687cfeab10bSVasanthakumar Thiagarajan ath6kl_dbg(ATH6KL_DBG_ANY, 688cfeab10bSVasanthakumar Thiagarajan "hif-scatter enabled: max scatter req : %d entries: %d\n", 689cfeab10bSVasanthakumar Thiagarajan MAX_SCATTER_REQUESTS, 690cfeab10bSVasanthakumar Thiagarajan MAX_SCATTER_ENTRIES_PER_REQ); 691cfeab10bSVasanthakumar Thiagarajan 69250745af7SVasanthakumar Thiagarajan target->max_scat_entries = MAX_SCATTER_ENTRIES_PER_REQ; 69350745af7SVasanthakumar Thiagarajan target->max_xfer_szper_scatreq = 694cfeab10bSVasanthakumar Thiagarajan MAX_SCATTER_REQ_TRANSFER_SIZE; 695cfeab10bSVasanthakumar Thiagarajan } else { 696cfeab10bSVasanthakumar Thiagarajan ath6kl_sdio_cleanup_scatter(ar); 697cfeab10bSVasanthakumar Thiagarajan ath6kl_warn("hif scatter resource setup failed, trying virtual scatter method\n"); 698cfeab10bSVasanthakumar Thiagarajan } 699cfeab10bSVasanthakumar Thiagarajan } 700cfeab10bSVasanthakumar Thiagarajan 701cfeab10bSVasanthakumar Thiagarajan if (virt_scat || ret) { 702cfeab10bSVasanthakumar Thiagarajan ret = ath6kl_sdio_alloc_prep_scat_req(ar_sdio, 703cfeab10bSVasanthakumar Thiagarajan ATH6KL_SCATTER_ENTRIES_PER_REQ, 704cfeab10bSVasanthakumar Thiagarajan ATH6KL_SCATTER_REQS, virt_scat); 705cfeab10bSVasanthakumar Thiagarajan 70618a0f93eSVasanthakumar Thiagarajan if (ret) { 707cfeab10bSVasanthakumar Thiagarajan ath6kl_err("failed to alloc virtual scatter resources !\n"); 70818a0f93eSVasanthakumar Thiagarajan ath6kl_sdio_cleanup_scatter(ar); 70918a0f93eSVasanthakumar Thiagarajan return ret; 71018a0f93eSVasanthakumar Thiagarajan } 71118a0f93eSVasanthakumar Thiagarajan 712cfeab10bSVasanthakumar Thiagarajan ath6kl_dbg(ATH6KL_DBG_ANY, 713cfeab10bSVasanthakumar Thiagarajan "Vitual scatter enabled, max_scat_req:%d, entries:%d\n", 714cfeab10bSVasanthakumar Thiagarajan ATH6KL_SCATTER_REQS, ATH6KL_SCATTER_ENTRIES_PER_REQ); 715cfeab10bSVasanthakumar Thiagarajan 71650745af7SVasanthakumar Thiagarajan target->max_scat_entries = ATH6KL_SCATTER_ENTRIES_PER_REQ; 71750745af7SVasanthakumar Thiagarajan target->max_xfer_szper_scatreq = 718cfeab10bSVasanthakumar Thiagarajan ATH6KL_MAX_TRANSFER_SIZE_PER_SCATTER; 719cfeab10bSVasanthakumar Thiagarajan } 720cfeab10bSVasanthakumar Thiagarajan 72118a0f93eSVasanthakumar Thiagarajan return 0; 72218a0f93eSVasanthakumar Thiagarajan } 72318a0f93eSVasanthakumar Thiagarajan 724bdcd8170SKalle Valo static const struct ath6kl_hif_ops ath6kl_sdio_ops = { 725bdcd8170SKalle Valo .read_write_sync = ath6kl_sdio_read_write_sync, 726bdcd8170SKalle Valo .write_async = ath6kl_sdio_write_async, 727bdcd8170SKalle Valo .irq_enable = ath6kl_sdio_irq_enable, 728bdcd8170SKalle Valo .irq_disable = ath6kl_sdio_irq_disable, 729bdcd8170SKalle Valo .scatter_req_get = ath6kl_sdio_scatter_req_get, 730bdcd8170SKalle Valo .scatter_req_add = ath6kl_sdio_scatter_req_add, 731bdcd8170SKalle Valo .enable_scatter = ath6kl_sdio_enable_scatter, 732f74a7361SVasanthakumar Thiagarajan .scat_req_rw = ath6kl_sdio_async_rw_scatter, 733bdcd8170SKalle Valo .cleanup_scatter = ath6kl_sdio_cleanup_scatter, 734bdcd8170SKalle Valo }; 735bdcd8170SKalle Valo 736bdcd8170SKalle Valo static int ath6kl_sdio_probe(struct sdio_func *func, 737bdcd8170SKalle Valo const struct sdio_device_id *id) 738bdcd8170SKalle Valo { 739bdcd8170SKalle Valo int ret; 740bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio; 741bdcd8170SKalle Valo struct ath6kl *ar; 742bdcd8170SKalle Valo int count; 743bdcd8170SKalle Valo 744bdcd8170SKalle Valo ath6kl_dbg(ATH6KL_DBG_TRC, 745bdcd8170SKalle Valo "%s: func: 0x%X, vendor id: 0x%X, dev id: 0x%X, block size: 0x%X/0x%X\n", 746bdcd8170SKalle Valo __func__, func->num, func->vendor, 747bdcd8170SKalle Valo func->device, func->max_blksize, func->cur_blksize); 748bdcd8170SKalle Valo 749bdcd8170SKalle Valo ar_sdio = kzalloc(sizeof(struct ath6kl_sdio), GFP_KERNEL); 750bdcd8170SKalle Valo if (!ar_sdio) 751bdcd8170SKalle Valo return -ENOMEM; 752bdcd8170SKalle Valo 753bdcd8170SKalle Valo ar_sdio->dma_buffer = kzalloc(HIF_DMA_BUFFER_SIZE, GFP_KERNEL); 754bdcd8170SKalle Valo if (!ar_sdio->dma_buffer) { 755bdcd8170SKalle Valo ret = -ENOMEM; 756bdcd8170SKalle Valo goto err_hif; 757bdcd8170SKalle Valo } 758bdcd8170SKalle Valo 759bdcd8170SKalle Valo ar_sdio->func = func; 760bdcd8170SKalle Valo sdio_set_drvdata(func, ar_sdio); 761bdcd8170SKalle Valo 762bdcd8170SKalle Valo ar_sdio->id = id; 763bdcd8170SKalle Valo ar_sdio->is_disabled = true; 764bdcd8170SKalle Valo 765bdcd8170SKalle Valo spin_lock_init(&ar_sdio->lock); 766bdcd8170SKalle Valo spin_lock_init(&ar_sdio->scat_lock); 767bdcd8170SKalle Valo spin_lock_init(&ar_sdio->wr_async_lock); 768bdcd8170SKalle Valo 769bdcd8170SKalle Valo INIT_LIST_HEAD(&ar_sdio->scat_req); 770bdcd8170SKalle Valo INIT_LIST_HEAD(&ar_sdio->bus_req_freeq); 771bdcd8170SKalle Valo INIT_LIST_HEAD(&ar_sdio->wr_asyncq); 772bdcd8170SKalle Valo 773bdcd8170SKalle Valo INIT_WORK(&ar_sdio->wr_async_work, ath6kl_sdio_write_async_work); 774bdcd8170SKalle Valo 775bdcd8170SKalle Valo for (count = 0; count < BUS_REQUEST_MAX_NUM; count++) 776bdcd8170SKalle Valo ath6kl_sdio_free_bus_req(ar_sdio, &ar_sdio->bus_req[count]); 777bdcd8170SKalle Valo 778bdcd8170SKalle Valo ar = ath6kl_core_alloc(&ar_sdio->func->dev); 779bdcd8170SKalle Valo if (!ar) { 780bdcd8170SKalle Valo ath6kl_err("Failed to alloc ath6kl core\n"); 781bdcd8170SKalle Valo ret = -ENOMEM; 782bdcd8170SKalle Valo goto err_dma; 783bdcd8170SKalle Valo } 784bdcd8170SKalle Valo 785bdcd8170SKalle Valo ar_sdio->ar = ar; 786bdcd8170SKalle Valo ar->hif_priv = ar_sdio; 787bdcd8170SKalle Valo ar->hif_ops = &ath6kl_sdio_ops; 788bdcd8170SKalle Valo 789bdcd8170SKalle Valo ath6kl_sdio_set_mbox_info(ar); 790bdcd8170SKalle Valo 791bdcd8170SKalle Valo sdio_claim_host(func); 792bdcd8170SKalle Valo 793bdcd8170SKalle Valo if ((ar_sdio->id->device & MANUFACTURER_ID_ATH6KL_BASE_MASK) >= 794bdcd8170SKalle Valo MANUFACTURER_ID_AR6003_BASE) { 795bdcd8170SKalle Valo /* enable 4-bit ASYNC interrupt on AR6003 or later */ 796bdcd8170SKalle Valo ret = ath6kl_sdio_func0_cmd52_wr_byte(func->card, 797bdcd8170SKalle Valo CCCR_SDIO_IRQ_MODE_REG, 798bdcd8170SKalle Valo SDIO_IRQ_MODE_ASYNC_4BIT_IRQ); 799bdcd8170SKalle Valo if (ret) { 800bdcd8170SKalle Valo ath6kl_err("Failed to enable 4-bit async irq mode %d\n", 801bdcd8170SKalle Valo ret); 802bdcd8170SKalle Valo sdio_release_host(func); 803bdcd8170SKalle Valo goto err_dma; 804bdcd8170SKalle Valo } 805bdcd8170SKalle Valo 806bdcd8170SKalle Valo ath6kl_dbg(ATH6KL_DBG_TRC, "4-bit async irq mode enabled\n"); 807bdcd8170SKalle Valo } 808bdcd8170SKalle Valo 809bdcd8170SKalle Valo /* give us some time to enable, in ms */ 810bdcd8170SKalle Valo func->enable_timeout = 100; 811bdcd8170SKalle Valo 812bdcd8170SKalle Valo sdio_release_host(func); 813bdcd8170SKalle Valo 814bdcd8170SKalle Valo ret = ath6kl_sdio_power_on(ar_sdio); 815bdcd8170SKalle Valo if (ret) 816bdcd8170SKalle Valo goto err_dma; 817bdcd8170SKalle Valo 818bdcd8170SKalle Valo sdio_claim_host(func); 819bdcd8170SKalle Valo 820bdcd8170SKalle Valo ret = sdio_set_block_size(func, HIF_MBOX_BLOCK_SIZE); 821bdcd8170SKalle Valo if (ret) { 822bdcd8170SKalle Valo ath6kl_err("Set sdio block size %d failed: %d)\n", 823bdcd8170SKalle Valo HIF_MBOX_BLOCK_SIZE, ret); 824bdcd8170SKalle Valo sdio_release_host(func); 825bdcd8170SKalle Valo goto err_off; 826bdcd8170SKalle Valo } 827bdcd8170SKalle Valo 828bdcd8170SKalle Valo sdio_release_host(func); 829bdcd8170SKalle Valo 830bdcd8170SKalle Valo ret = ath6kl_core_init(ar); 831bdcd8170SKalle Valo if (ret) { 832bdcd8170SKalle Valo ath6kl_err("Failed to init ath6kl core\n"); 833bdcd8170SKalle Valo goto err_off; 834bdcd8170SKalle Valo } 835bdcd8170SKalle Valo 836bdcd8170SKalle Valo return ret; 837bdcd8170SKalle Valo 838bdcd8170SKalle Valo err_off: 839bdcd8170SKalle Valo ath6kl_sdio_power_off(ar_sdio); 840bdcd8170SKalle Valo err_dma: 841bdcd8170SKalle Valo kfree(ar_sdio->dma_buffer); 842bdcd8170SKalle Valo err_hif: 843bdcd8170SKalle Valo kfree(ar_sdio); 844bdcd8170SKalle Valo 845bdcd8170SKalle Valo return ret; 846bdcd8170SKalle Valo } 847bdcd8170SKalle Valo 848bdcd8170SKalle Valo static void ath6kl_sdio_remove(struct sdio_func *func) 849bdcd8170SKalle Valo { 850bdcd8170SKalle Valo struct ath6kl_sdio *ar_sdio; 851bdcd8170SKalle Valo 852bdcd8170SKalle Valo ar_sdio = sdio_get_drvdata(func); 853bdcd8170SKalle Valo 854bdcd8170SKalle Valo ath6kl_stop_txrx(ar_sdio->ar); 855bdcd8170SKalle Valo cancel_work_sync(&ar_sdio->wr_async_work); 856bdcd8170SKalle Valo 857bdcd8170SKalle Valo ath6kl_unavail_ev(ar_sdio->ar); 858bdcd8170SKalle Valo 859bdcd8170SKalle Valo ath6kl_sdio_power_off(ar_sdio); 860bdcd8170SKalle Valo 861bdcd8170SKalle Valo kfree(ar_sdio->dma_buffer); 862bdcd8170SKalle Valo kfree(ar_sdio); 863bdcd8170SKalle Valo } 864bdcd8170SKalle Valo 865bdcd8170SKalle Valo static const struct sdio_device_id ath6kl_sdio_devices[] = { 866bdcd8170SKalle Valo {SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6003_BASE | 0x0))}, 867bdcd8170SKalle Valo {SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6003_BASE | 0x1))}, 868bdcd8170SKalle Valo {}, 869bdcd8170SKalle Valo }; 870bdcd8170SKalle Valo 871bdcd8170SKalle Valo MODULE_DEVICE_TABLE(sdio, ath6kl_sdio_devices); 872bdcd8170SKalle Valo 873bdcd8170SKalle Valo static struct sdio_driver ath6kl_sdio_driver = { 874bdcd8170SKalle Valo .name = "ath6kl_sdio", 875bdcd8170SKalle Valo .id_table = ath6kl_sdio_devices, 876bdcd8170SKalle Valo .probe = ath6kl_sdio_probe, 877bdcd8170SKalle Valo .remove = ath6kl_sdio_remove, 878bdcd8170SKalle Valo }; 879bdcd8170SKalle Valo 880bdcd8170SKalle Valo static int __init ath6kl_sdio_init(void) 881bdcd8170SKalle Valo { 882bdcd8170SKalle Valo int ret; 883bdcd8170SKalle Valo 884bdcd8170SKalle Valo ret = sdio_register_driver(&ath6kl_sdio_driver); 885bdcd8170SKalle Valo if (ret) 886bdcd8170SKalle Valo ath6kl_err("sdio driver registration failed: %d\n", ret); 887bdcd8170SKalle Valo 888bdcd8170SKalle Valo return ret; 889bdcd8170SKalle Valo } 890bdcd8170SKalle Valo 891bdcd8170SKalle Valo static void __exit ath6kl_sdio_exit(void) 892bdcd8170SKalle Valo { 893bdcd8170SKalle Valo sdio_unregister_driver(&ath6kl_sdio_driver); 894bdcd8170SKalle Valo } 895bdcd8170SKalle Valo 896bdcd8170SKalle Valo module_init(ath6kl_sdio_init); 897bdcd8170SKalle Valo module_exit(ath6kl_sdio_exit); 898bdcd8170SKalle Valo 899bdcd8170SKalle Valo MODULE_AUTHOR("Atheros Communications, Inc."); 900bdcd8170SKalle Valo MODULE_DESCRIPTION("Driver support for Atheros AR600x SDIO devices"); 901bdcd8170SKalle Valo MODULE_LICENSE("Dual BSD/GPL"); 902bdcd8170SKalle Valo 903bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV2_OTP_FILE); 904bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV2_FIRMWARE_FILE); 905bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV2_PATCH_FILE); 906bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV2_BOARD_DATA_FILE); 907bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV2_DEFAULT_BOARD_DATA_FILE); 908bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV3_OTP_FILE); 909bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV3_FIRMWARE_FILE); 910bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV3_PATCH_FILE); 911bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV3_BOARD_DATA_FILE); 912bdcd8170SKalle Valo MODULE_FIRMWARE(AR6003_REV3_DEFAULT_BOARD_DATA_FILE); 913