diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath6kl/sdio.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath6kl/sdio.c | 949 |
1 files changed, 949 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath6kl/sdio.c b/drivers/net/wireless/ath/ath6kl/sdio.c new file mode 100644 index 00000000000..f1dc311ee0c --- /dev/null +++ b/drivers/net/wireless/ath/ath6kl/sdio.c @@ -0,0 +1,949 @@ +/* + * Copyright (c) 2004-2011 Atheros Communications Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <linux/mmc/card.h> +#include <linux/mmc/mmc.h> +#include <linux/mmc/host.h> +#include <linux/mmc/sdio_func.h> +#include <linux/mmc/sdio_ids.h> +#include <linux/mmc/sdio.h> +#include <linux/mmc/sd.h> +#include "htc_hif.h" +#include "hif-ops.h" +#include "target.h" +#include "debug.h" +#include "cfg80211.h" + +struct ath6kl_sdio { + struct sdio_func *func; + + spinlock_t lock; + + /* free list */ + struct list_head bus_req_freeq; + + /* available bus requests */ + struct bus_request bus_req[BUS_REQUEST_MAX_NUM]; + + struct ath6kl *ar; + u8 *dma_buffer; + + /* scatter request list head */ + struct list_head scat_req; + + spinlock_t scat_lock; + bool is_disabled; + atomic_t irq_handling; + const struct sdio_device_id *id; + struct work_struct wr_async_work; + struct list_head wr_asyncq; + spinlock_t wr_async_lock; +}; + +#define CMD53_ARG_READ 0 +#define CMD53_ARG_WRITE 1 +#define CMD53_ARG_BLOCK_BASIS 1 +#define CMD53_ARG_FIXED_ADDRESS 0 +#define CMD53_ARG_INCR_ADDRESS 1 + +static inline struct ath6kl_sdio *ath6kl_sdio_priv(struct ath6kl *ar) +{ + return ar->hif_priv; +} + +/* + * Macro to check if DMA buffer is WORD-aligned and DMA-able. + * Most host controllers assume the buffer is DMA'able and will + * bug-check otherwise (i.e. buffers on the stack). virt_addr_valid + * check fails on stack memory. + */ +static inline bool buf_needs_bounce(u8 *buf) +{ + return ((unsigned long) buf & 0x3) || !virt_addr_valid(buf); +} + +static void ath6kl_sdio_set_mbox_info(struct ath6kl *ar) +{ + struct ath6kl_mbox_info *mbox_info = &ar->mbox_info; + + /* EP1 has an extended range */ + mbox_info->htc_addr = HIF_MBOX_BASE_ADDR; + mbox_info->htc_ext_addr = HIF_MBOX0_EXT_BASE_ADDR; + mbox_info->htc_ext_sz = HIF_MBOX0_EXT_WIDTH; + mbox_info->block_size = HIF_MBOX_BLOCK_SIZE; + mbox_info->gmbox_addr = HIF_GMBOX_BASE_ADDR; + mbox_info->gmbox_sz = HIF_GMBOX_WIDTH; +} + +static inline void ath6kl_sdio_set_cmd53_arg(u32 *arg, u8 rw, u8 func, + u8 mode, u8 opcode, u32 addr, + u16 blksz) +{ + *arg = (((rw & 1) << 31) | + ((func & 0x7) << 28) | + ((mode & 1) << 27) | + ((opcode & 1) << 26) | + ((addr & 0x1FFFF) << 9) | + (blksz & 0x1FF)); +} + +static inline void ath6kl_sdio_set_cmd52_arg(u32 *arg, u8 write, u8 raw, + unsigned int address, + unsigned char val) +{ + const u8 func = 0; + + *arg = ((write & 1) << 31) | + ((func & 0x7) << 28) | + ((raw & 1) << 27) | + (1 << 26) | + ((address & 0x1FFFF) << 9) | + (1 << 8) | + (val & 0xFF); +} + +static int ath6kl_sdio_func0_cmd52_wr_byte(struct mmc_card *card, + unsigned int address, + unsigned char byte) +{ + struct mmc_command io_cmd; + + memset(&io_cmd, 0, sizeof(io_cmd)); + ath6kl_sdio_set_cmd52_arg(&io_cmd.arg, 1, 0, address, byte); + io_cmd.opcode = SD_IO_RW_DIRECT; + io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC; + + return mmc_wait_for_cmd(card->host, &io_cmd, 0); +} + +static int ath6kl_sdio_io(struct sdio_func *func, u32 request, u32 addr, + u8 *buf, u32 len) +{ + int ret = 0; + + if (request & HIF_WRITE) { + /* FIXME: looks like ugly workaround for something */ + if (addr >= HIF_MBOX_BASE_ADDR && + addr <= HIF_MBOX_END_ADDR) + addr += (HIF_MBOX_WIDTH - len); + + /* FIXME: this also looks like ugly workaround */ + if (addr == HIF_MBOX0_EXT_BASE_ADDR) + addr += HIF_MBOX0_EXT_WIDTH - len; + + if (request & HIF_FIXED_ADDRESS) + ret = sdio_writesb(func, addr, buf, len); + else + ret = sdio_memcpy_toio(func, addr, buf, len); + } else { + if (request & HIF_FIXED_ADDRESS) + ret = sdio_readsb(func, buf, addr, len); + else + ret = sdio_memcpy_fromio(func, buf, addr, len); + } + + ath6kl_dbg(ATH6KL_DBG_SDIO, "%s addr 0x%x%s buf 0x%p len %d\n", + request & HIF_WRITE ? "wr" : "rd", addr, + request & HIF_FIXED_ADDRESS ? " (fixed)" : "", buf, len); + ath6kl_dbg_dump(ATH6KL_DBG_SDIO_DUMP, NULL, "sdio ", buf, len); + + return ret; +} + +static struct bus_request *ath6kl_sdio_alloc_busreq(struct ath6kl_sdio *ar_sdio) +{ + struct bus_request *bus_req; + unsigned long flag; + + spin_lock_irqsave(&ar_sdio->lock, flag); + + if (list_empty(&ar_sdio->bus_req_freeq)) { + spin_unlock_irqrestore(&ar_sdio->lock, flag); + return NULL; + } + + bus_req = list_first_entry(&ar_sdio->bus_req_freeq, + struct bus_request, list); + list_del(&bus_req->list); + + spin_unlock_irqrestore(&ar_sdio->lock, flag); + ath6kl_dbg(ATH6KL_DBG_SCATTER, "%s: bus request 0x%p\n", + __func__, bus_req); + + return bus_req; +} + +static void ath6kl_sdio_free_bus_req(struct ath6kl_sdio *ar_sdio, + struct bus_request *bus_req) +{ + unsigned long flag; + + ath6kl_dbg(ATH6KL_DBG_SCATTER, "%s: bus request 0x%p\n", + __func__, bus_req); + + spin_lock_irqsave(&ar_sdio->lock, flag); + list_add_tail(&bus_req->list, &ar_sdio->bus_req_freeq); + spin_unlock_irqrestore(&ar_sdio->lock, flag); +} + +static void ath6kl_sdio_setup_scat_data(struct hif_scatter_req *scat_req, + struct mmc_data *data) +{ + struct scatterlist *sg; + int i; + + data->blksz = HIF_MBOX_BLOCK_SIZE; + data->blocks = scat_req->len / HIF_MBOX_BLOCK_SIZE; + + ath6kl_dbg(ATH6KL_DBG_SCATTER, + "hif-scatter: (%s) addr: 0x%X, (block len: %d, block count: %d) , (tot:%d,sg:%d)\n", + (scat_req->req & HIF_WRITE) ? "WR" : "RD", scat_req->addr, + data->blksz, data->blocks, scat_req->len, + scat_req->scat_entries); + + data->flags = (scat_req->req & HIF_WRITE) ? MMC_DATA_WRITE : + MMC_DATA_READ; + + /* fill SG entries */ + sg = scat_req->sgentries; + sg_init_table(sg, scat_req->scat_entries); + + /* assemble SG list */ + for (i = 0; i < scat_req->scat_entries; i++, sg++) { + ath6kl_dbg(ATH6KL_DBG_SCATTER, "%d: addr:0x%p, len:%d\n", + i, scat_req->scat_list[i].buf, + scat_req->scat_list[i].len); + + sg_set_buf(sg, scat_req->scat_list[i].buf, + scat_req->scat_list[i].len); + } + + /* set scatter-gather table for request */ + data->sg = scat_req->sgentries; + data->sg_len = scat_req->scat_entries; +} + +static int ath6kl_sdio_scat_rw(struct ath6kl_sdio *ar_sdio, + struct bus_request *req) +{ + struct mmc_request mmc_req; + struct mmc_command cmd; + struct mmc_data data; + struct hif_scatter_req *scat_req; + u8 opcode, rw; + int status, len; + + scat_req = req->scat_req; + + if (scat_req->virt_scat) { + len = scat_req->len; + if (scat_req->req & HIF_BLOCK_BASIS) + len = round_down(len, HIF_MBOX_BLOCK_SIZE); + + status = ath6kl_sdio_io(ar_sdio->func, scat_req->req, + scat_req->addr, scat_req->virt_dma_buf, + len); + goto scat_complete; + } + + memset(&mmc_req, 0, sizeof(struct mmc_request)); + memset(&cmd, 0, sizeof(struct mmc_command)); + memset(&data, 0, sizeof(struct mmc_data)); + + ath6kl_sdio_setup_scat_data(scat_req, &data); + + opcode = (scat_req->req & HIF_FIXED_ADDRESS) ? + CMD53_ARG_FIXED_ADDRESS : CMD53_ARG_INCR_ADDRESS; + + rw = (scat_req->req & HIF_WRITE) ? CMD53_ARG_WRITE : CMD53_ARG_READ; + + /* Fixup the address so that the last byte will fall on MBOX EOM */ + if (scat_req->req & HIF_WRITE) { + if (scat_req->addr == HIF_MBOX_BASE_ADDR) + scat_req->addr += HIF_MBOX_WIDTH - scat_req->len; + else + /* Uses extended address range */ + scat_req->addr += HIF_MBOX0_EXT_WIDTH - scat_req->len; + } + + /* set command argument */ + ath6kl_sdio_set_cmd53_arg(&cmd.arg, rw, ar_sdio->func->num, + CMD53_ARG_BLOCK_BASIS, opcode, scat_req->addr, + data.blocks); + + cmd.opcode = SD_IO_RW_EXTENDED; + cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC; + + mmc_req.cmd = &cmd; + mmc_req.data = &data; + + mmc_set_data_timeout(&data, ar_sdio->func->card); + /* synchronous call to process request */ + mmc_wait_for_req(ar_sdio->func->card->host, &mmc_req); + + status = cmd.error ? cmd.error : data.error; + +scat_complete: + scat_req->status = status; + + if (scat_req->status) + ath6kl_err("Scatter write request failed:%d\n", + scat_req->status); + + if (scat_req->req & HIF_ASYNCHRONOUS) + scat_req->complete(ar_sdio->ar->htc_target, scat_req); + + return status; +} + +static int ath6kl_sdio_alloc_prep_scat_req(struct ath6kl_sdio *ar_sdio, + int n_scat_entry, int n_scat_req, + bool virt_scat) +{ + struct hif_scatter_req *s_req; + struct bus_request *bus_req; + int i, scat_req_sz, scat_list_sz, sg_sz, buf_sz; + u8 *virt_buf; + + scat_list_sz = (n_scat_entry - 1) * sizeof(struct hif_scatter_item); + scat_req_sz = sizeof(*s_req) + scat_list_sz; + + if (!virt_scat) + sg_sz = sizeof(struct scatterlist) * n_scat_entry; + else + buf_sz = 2 * L1_CACHE_BYTES + + ATH6KL_MAX_TRANSFER_SIZE_PER_SCATTER; + + for (i = 0; i < n_scat_req; i++) { + /* allocate the scatter request */ + s_req = kzalloc(scat_req_sz, GFP_KERNEL); + if (!s_req) + return -ENOMEM; + + if (virt_scat) { + virt_buf = kzalloc(buf_sz, GFP_KERNEL); + if (!virt_buf) { + kfree(s_req); + return -ENOMEM; + } + + s_req->virt_dma_buf = + (u8 *)L1_CACHE_ALIGN((unsigned long)virt_buf); + } else { + /* allocate sglist */ + s_req->sgentries = kzalloc(sg_sz, GFP_KERNEL); + + if (!s_req->sgentries) { + kfree(s_req); + return -ENOMEM; + } + } + + /* allocate a bus request for this scatter request */ + bus_req = ath6kl_sdio_alloc_busreq(ar_sdio); + if (!bus_req) { + kfree(s_req->sgentries); + kfree(s_req->virt_dma_buf); + kfree(s_req); + return -ENOMEM; + } + + /* assign the scatter request to this bus request */ + bus_req->scat_req = s_req; + s_req->busrequest = bus_req; + + s_req->virt_scat = virt_scat; + + /* add it to the scatter pool */ + hif_scatter_req_add(ar_sdio->ar, s_req); + } + + return 0; +} + +static int ath6kl_sdio_read_write_sync(struct ath6kl *ar, u32 addr, u8 *buf, + u32 len, u32 request) +{ + struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); + u8 *tbuf = NULL; + int ret; + bool bounced = false; + + if (request & HIF_BLOCK_BASIS) + len = round_down(len, HIF_MBOX_BLOCK_SIZE); + + if (buf_needs_bounce(buf)) { + if (!ar_sdio->dma_buffer) + return -ENOMEM; + tbuf = ar_sdio->dma_buffer; + memcpy(tbuf, buf, len); + bounced = true; + } else + tbuf = buf; + + sdio_claim_host(ar_sdio->func); + ret = ath6kl_sdio_io(ar_sdio->func, request, addr, tbuf, len); + if ((request & HIF_READ) && bounced) + memcpy(buf, tbuf, len); + sdio_release_host(ar_sdio->func); + + return ret; +} + +static void __ath6kl_sdio_write_async(struct ath6kl_sdio *ar_sdio, + struct bus_request *req) +{ + if (req->scat_req) + ath6kl_sdio_scat_rw(ar_sdio, req); + else { + void *context; + int status; + + status = ath6kl_sdio_read_write_sync(ar_sdio->ar, req->address, + req->buffer, req->length, + req->request); + context = req->packet; + ath6kl_sdio_free_bus_req(ar_sdio, req); + ath6kldev_rw_comp_handler(context, status); + } +} + +static void ath6kl_sdio_write_async_work(struct work_struct *work) +{ + struct ath6kl_sdio *ar_sdio; + unsigned long flags; + struct bus_request *req, *tmp_req; + + ar_sdio = container_of(work, struct ath6kl_sdio, wr_async_work); + sdio_claim_host(ar_sdio->func); + + spin_lock_irqsave(&ar_sdio->wr_async_lock, flags); + list_for_each_entry_safe(req, tmp_req, &ar_sdio->wr_asyncq, list) { + list_del(&req->list); + spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags); + __ath6kl_sdio_write_async(ar_sdio, req); + spin_lock_irqsave(&ar_sdio->wr_async_lock, flags); + } + spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags); + + sdio_release_host(ar_sdio->func); +} + +static void ath6kl_sdio_irq_handler(struct sdio_func *func) +{ + int status; + struct ath6kl_sdio *ar_sdio; + + ath6kl_dbg(ATH6KL_DBG_SDIO, "irq\n"); + + ar_sdio = sdio_get_drvdata(func); + atomic_set(&ar_sdio->irq_handling, 1); + + /* + * Release the host during interrups so we can pick it back up when + * we process commands. + */ + sdio_release_host(ar_sdio->func); + + status = ath6kldev_intr_bh_handler(ar_sdio->ar); + sdio_claim_host(ar_sdio->func); + atomic_set(&ar_sdio->irq_handling, 0); + WARN_ON(status && status != -ECANCELED); +} + +static int ath6kl_sdio_power_on(struct ath6kl_sdio *ar_sdio) +{ + struct sdio_func *func = ar_sdio->func; + int ret = 0; + + if (!ar_sdio->is_disabled) + return 0; + + sdio_claim_host(func); + + ret = sdio_enable_func(func); + if (ret) { + ath6kl_err("Unable to enable sdio func: %d)\n", ret); + sdio_release_host(func); + return ret; + } + + sdio_release_host(func); + + /* + * Wait for hardware to initialise. It should take a lot less than + * 10 ms but let's be conservative here. + */ + msleep(10); + + ar_sdio->is_disabled = false; + + return ret; +} + +static int ath6kl_sdio_power_off(struct ath6kl_sdio *ar_sdio) +{ + int ret; + + if (ar_sdio->is_disabled) + return 0; + + /* Disable the card */ + sdio_claim_host(ar_sdio->func); + ret = sdio_disable_func(ar_sdio->func); + sdio_release_host(ar_sdio->func); + + if (ret) + return ret; + + ar_sdio->is_disabled = true; + + return ret; +} + +static int ath6kl_sdio_write_async(struct ath6kl *ar, u32 address, u8 *buffer, + u32 length, u32 request, + struct htc_packet *packet) +{ + struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); + struct bus_request *bus_req; + unsigned long flags; + + bus_req = ath6kl_sdio_alloc_busreq(ar_sdio); + + if (!bus_req) + return -ENOMEM; + + bus_req->address = address; + bus_req->buffer = buffer; + bus_req->length = length; + bus_req->request = request; + bus_req->packet = packet; + + spin_lock_irqsave(&ar_sdio->wr_async_lock, flags); + list_add_tail(&bus_req->list, &ar_sdio->wr_asyncq); + spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags); + queue_work(ar->ath6kl_wq, &ar_sdio->wr_async_work); + + return 0; +} + +static void ath6kl_sdio_irq_enable(struct ath6kl *ar) +{ + struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); + int ret; + + sdio_claim_host(ar_sdio->func); + + /* Register the isr */ + ret = sdio_claim_irq(ar_sdio->func, ath6kl_sdio_irq_handler); + if (ret) + ath6kl_err("Failed to claim sdio irq: %d\n", ret); + + sdio_release_host(ar_sdio->func); +} + +static void ath6kl_sdio_irq_disable(struct ath6kl *ar) +{ + struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); + int ret; + + sdio_claim_host(ar_sdio->func); + + /* Mask our function IRQ */ + while (atomic_read(&ar_sdio->irq_handling)) { + sdio_release_host(ar_sdio->func); + schedule_timeout(HZ / 10); + sdio_claim_host(ar_sdio->func); + } + + ret = sdio_release_irq(ar_sdio->func); + if (ret) + ath6kl_err("Failed to release sdio irq: %d\n", ret); + + sdio_release_host(ar_sdio->func); +} + +static struct hif_scatter_req *ath6kl_sdio_scatter_req_get(struct ath6kl *ar) +{ + struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); + struct hif_scatter_req *node = NULL; + unsigned long flag; + + spin_lock_irqsave(&ar_sdio->scat_lock, flag); + + if (!list_empty(&ar_sdio->scat_req)) { + node = list_first_entry(&ar_sdio->scat_req, + struct hif_scatter_req, list); + list_del(&node->list); + } + + spin_unlock_irqrestore(&ar_sdio->scat_lock, flag); + + return node; +} + +static void ath6kl_sdio_scatter_req_add(struct ath6kl *ar, + struct hif_scatter_req *s_req) +{ + struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); + unsigned long flag; + + spin_lock_irqsave(&ar_sdio->scat_lock, flag); + + list_add_tail(&s_req->list, &ar_sdio->scat_req); + + spin_unlock_irqrestore(&ar_sdio->scat_lock, flag); + +} + +/* scatter gather read write request */ +static int ath6kl_sdio_async_rw_scatter(struct ath6kl *ar, + struct hif_scatter_req *scat_req) +{ + struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); + u32 request = scat_req->req; + int status = 0; + unsigned long flags; + + if (!scat_req->len) + return -EINVAL; + + ath6kl_dbg(ATH6KL_DBG_SCATTER, + "hif-scatter: total len: %d scatter entries: %d\n", + scat_req->len, scat_req->scat_entries); + + if (request & HIF_SYNCHRONOUS) { + sdio_claim_host(ar_sdio->func); + status = ath6kl_sdio_scat_rw(ar_sdio, scat_req->busrequest); + sdio_release_host(ar_sdio->func); + } else { + spin_lock_irqsave(&ar_sdio->wr_async_lock, flags); + list_add_tail(&scat_req->busrequest->list, &ar_sdio->wr_asyncq); + spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags); + queue_work(ar->ath6kl_wq, &ar_sdio->wr_async_work); + } + + return status; +} + +/* clean up scatter support */ +static void ath6kl_sdio_cleanup_scatter(struct ath6kl *ar) +{ + struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); + struct hif_scatter_req *s_req, *tmp_req; + unsigned long flag; + + /* empty the free list */ + spin_lock_irqsave(&ar_sdio->scat_lock, flag); + list_for_each_entry_safe(s_req, tmp_req, &ar_sdio->scat_req, list) { + list_del(&s_req->list); + spin_unlock_irqrestore(&ar_sdio->scat_lock, flag); + + if (s_req->busrequest) + ath6kl_sdio_free_bus_req(ar_sdio, s_req->busrequest); + kfree(s_req->virt_dma_buf); + kfree(s_req->sgentries); + kfree(s_req); + + spin_lock_irqsave(&ar_sdio->scat_lock, flag); + } + spin_unlock_irqrestore(&ar_sdio->scat_lock, flag); +} + +/* setup of HIF scatter resources */ +static int ath6kl_sdio_enable_scatter(struct ath6kl *ar) +{ + struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); + struct htc_target *target = ar->htc_target; + int ret; + bool virt_scat = false; + + /* check if host supports scatter and it meets our requirements */ + if (ar_sdio->func->card->host->max_segs < MAX_SCATTER_ENTRIES_PER_REQ) { + ath6kl_err("host only supports scatter of :%d entries, need: %d\n", + ar_sdio->func->card->host->max_segs, + MAX_SCATTER_ENTRIES_PER_REQ); + virt_scat = true; + } + + if (!virt_scat) { + ret = ath6kl_sdio_alloc_prep_scat_req(ar_sdio, + MAX_SCATTER_ENTRIES_PER_REQ, + MAX_SCATTER_REQUESTS, virt_scat); + + if (!ret) { + ath6kl_dbg(ATH6KL_DBG_SCATTER, + "hif-scatter enabled: max scatter req : %d entries: %d\n", + MAX_SCATTER_REQUESTS, + MAX_SCATTER_ENTRIES_PER_REQ); + + target->max_scat_entries = MAX_SCATTER_ENTRIES_PER_REQ; + target->max_xfer_szper_scatreq = + MAX_SCATTER_REQ_TRANSFER_SIZE; + } else { + ath6kl_sdio_cleanup_scatter(ar); + ath6kl_warn("hif scatter resource setup failed, trying virtual scatter method\n"); + } + } + + if (virt_scat || ret) { + ret = ath6kl_sdio_alloc_prep_scat_req(ar_sdio, + ATH6KL_SCATTER_ENTRIES_PER_REQ, + ATH6KL_SCATTER_REQS, virt_scat); + + if (ret) { + ath6kl_err("failed to alloc virtual scatter resources !\n"); + ath6kl_sdio_cleanup_scatter(ar); + return ret; + } + + ath6kl_dbg(ATH6KL_DBG_SCATTER, + "Vitual scatter enabled, max_scat_req:%d, entries:%d\n", + ATH6KL_SCATTER_REQS, ATH6KL_SCATTER_ENTRIES_PER_REQ); + + target->max_scat_entries = ATH6KL_SCATTER_ENTRIES_PER_REQ; + target->max_xfer_szper_scatreq = + ATH6KL_MAX_TRANSFER_SIZE_PER_SCATTER; + } + + return 0; +} + +static int ath6kl_sdio_suspend(struct ath6kl *ar) +{ + struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); + struct sdio_func *func = ar_sdio->func; + mmc_pm_flag_t flags; + int ret; + + flags = sdio_get_host_pm_caps(func); + + if (!(flags & MMC_PM_KEEP_POWER)) + /* as host doesn't support keep power we need to bail out */ + ath6kl_dbg(ATH6KL_DBG_SDIO, + "func %d doesn't support MMC_PM_KEEP_POWER\n", + func->num); + return -EINVAL; + + ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); + if (ret) { + printk(KERN_ERR "ath6kl: set sdio pm flags failed: %d\n", + ret); + return ret; + } + + ath6kl_deep_sleep_enable(ar); + + return 0; +} + +static const struct ath6kl_hif_ops ath6kl_sdio_ops = { + .read_write_sync = ath6kl_sdio_read_write_sync, + .write_async = ath6kl_sdio_write_async, + .irq_enable = ath6kl_sdio_irq_enable, + .irq_disable = ath6kl_sdio_irq_disable, + .scatter_req_get = ath6kl_sdio_scatter_req_get, + .scatter_req_add = ath6kl_sdio_scatter_req_add, + .enable_scatter = ath6kl_sdio_enable_scatter, + .scat_req_rw = ath6kl_sdio_async_rw_scatter, + .cleanup_scatter = ath6kl_sdio_cleanup_scatter, + .suspend = ath6kl_sdio_suspend, +}; + +static int ath6kl_sdio_probe(struct sdio_func *func, + const struct sdio_device_id *id) +{ + int ret; + struct ath6kl_sdio *ar_sdio; + struct ath6kl *ar; + int count; + + ath6kl_dbg(ATH6KL_DBG_SDIO, + "new func %d vendor 0x%x device 0x%x block 0x%x/0x%x\n", + func->num, func->vendor, func->device, + func->max_blksize, func->cur_blksize); + + ar_sdio = kzalloc(sizeof(struct ath6kl_sdio), GFP_KERNEL); + if (!ar_sdio) + return -ENOMEM; + + ar_sdio->dma_buffer = kzalloc(HIF_DMA_BUFFER_SIZE, GFP_KERNEL); + if (!ar_sdio->dma_buffer) { + ret = -ENOMEM; + goto err_hif; + } + + ar_sdio->func = func; + sdio_set_drvdata(func, ar_sdio); + + ar_sdio->id = id; + ar_sdio->is_disabled = true; + + spin_lock_init(&ar_sdio->lock); + spin_lock_init(&ar_sdio->scat_lock); + spin_lock_init(&ar_sdio->wr_async_lock); + + INIT_LIST_HEAD(&ar_sdio->scat_req); + INIT_LIST_HEAD(&ar_sdio->bus_req_freeq); + INIT_LIST_HEAD(&ar_sdio->wr_asyncq); + + INIT_WORK(&ar_sdio->wr_async_work, ath6kl_sdio_write_async_work); + + for (count = 0; count < BUS_REQUEST_MAX_NUM; count++) + ath6kl_sdio_free_bus_req(ar_sdio, &ar_sdio->bus_req[count]); + + ar = ath6kl_core_alloc(&ar_sdio->func->dev); + if (!ar) { + ath6kl_err("Failed to alloc ath6kl core\n"); + ret = -ENOMEM; + goto err_dma; + } + + ar_sdio->ar = ar; + ar->hif_priv = ar_sdio; + ar->hif_ops = &ath6kl_sdio_ops; + + ath6kl_sdio_set_mbox_info(ar); + + sdio_claim_host(func); + + if ((ar_sdio->id->device & MANUFACTURER_ID_ATH6KL_BASE_MASK) >= + MANUFACTURER_ID_AR6003_BASE) { + /* enable 4-bit ASYNC interrupt on AR6003 or later */ + ret = ath6kl_sdio_func0_cmd52_wr_byte(func->card, + CCCR_SDIO_IRQ_MODE_REG, + SDIO_IRQ_MODE_ASYNC_4BIT_IRQ); + if (ret) { + ath6kl_err("Failed to enable 4-bit async irq mode %d\n", + ret); + sdio_release_host(func); + goto err_cfg80211; + } + + ath6kl_dbg(ATH6KL_DBG_SDIO, "4-bit async irq mode enabled\n"); + } + + /* give us some time to enable, in ms */ + func->enable_timeout = 100; + + sdio_release_host(func); + + ret = ath6kl_sdio_power_on(ar_sdio); + if (ret) + goto err_cfg80211; + + sdio_claim_host(func); + + ret = sdio_set_block_size(func, HIF_MBOX_BLOCK_SIZE); + if (ret) { + ath6kl_err("Set sdio block size %d failed: %d)\n", + HIF_MBOX_BLOCK_SIZE, ret); + sdio_release_host(func); + goto err_off; + } + + sdio_release_host(func); + + ret = ath6kl_core_init(ar); + if (ret) { + ath6kl_err("Failed to init ath6kl core\n"); + goto err_off; + } + + return ret; + +err_off: + ath6kl_sdio_power_off(ar_sdio); +err_cfg80211: + ath6kl_cfg80211_deinit(ar_sdio->ar); +err_dma: + kfree(ar_sdio->dma_buffer); +err_hif: + kfree(ar_sdio); + + return ret; +} + +static void ath6kl_sdio_remove(struct sdio_func *func) +{ + struct ath6kl_sdio *ar_sdio; + + ath6kl_dbg(ATH6KL_DBG_SDIO, + "removed func %d vendor 0x%x device 0x%x\n", + func->num, func->vendor, func->device); + + ar_sdio = sdio_get_drvdata(func); + + ath6kl_stop_txrx(ar_sdio->ar); + cancel_work_sync(&ar_sdio->wr_async_work); + + ath6kl_unavail_ev(ar_sdio->ar); + + ath6kl_sdio_power_off(ar_sdio); + + kfree(ar_sdio->dma_buffer); + kfree(ar_sdio); +} + +static const struct sdio_device_id ath6kl_sdio_devices[] = { + {SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6003_BASE | 0x0))}, + {SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6003_BASE | 0x1))}, + {}, +}; + +MODULE_DEVICE_TABLE(sdio, ath6kl_sdio_devices); + +static struct sdio_driver ath6kl_sdio_driver = { + .name = "ath6kl_sdio", + .id_table = ath6kl_sdio_devices, + .probe = ath6kl_sdio_probe, + .remove = ath6kl_sdio_remove, +}; + +static int __init ath6kl_sdio_init(void) +{ + int ret; + + ret = sdio_register_driver(&ath6kl_sdio_driver); + if (ret) + ath6kl_err("sdio driver registration failed: %d\n", ret); + + return ret; +} + +static void __exit ath6kl_sdio_exit(void) +{ + sdio_unregister_driver(&ath6kl_sdio_driver); +} + +module_init(ath6kl_sdio_init); +module_exit(ath6kl_sdio_exit); + +MODULE_AUTHOR("Atheros Communications, Inc."); +MODULE_DESCRIPTION("Driver support for Atheros AR600x SDIO devices"); +MODULE_LICENSE("Dual BSD/GPL"); + +MODULE_FIRMWARE(AR6003_REV2_OTP_FILE); +MODULE_FIRMWARE(AR6003_REV2_FIRMWARE_FILE); +MODULE_FIRMWARE(AR6003_REV2_PATCH_FILE); +MODULE_FIRMWARE(AR6003_REV2_BOARD_DATA_FILE); +MODULE_FIRMWARE(AR6003_REV2_DEFAULT_BOARD_DATA_FILE); +MODULE_FIRMWARE(AR6003_REV3_OTP_FILE); +MODULE_FIRMWARE(AR6003_REV3_FIRMWARE_FILE); +MODULE_FIRMWARE(AR6003_REV3_PATCH_FILE); +MODULE_FIRMWARE(AR6003_REV3_BOARD_DATA_FILE); +MODULE_FIRMWARE(AR6003_REV3_DEFAULT_BOARD_DATA_FILE); |