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path: root/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
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Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c')
-rw-r--r--drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c179
1 files changed, 166 insertions, 13 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
index 4891e3df2058..3f8e69c29146 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
@@ -22,9 +22,11 @@
#include <linux/pci_ids.h>
#include <linux/sched.h>
#include <linux/completion.h>
+#include <linux/scatterlist.h>
#include <linux/mmc/sdio.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
#include <linux/platform_data/brcmfmac-sdio.h>
#include <defs.h>
@@ -303,6 +305,153 @@ void brcmf_sdio_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
*ret = retval;
}
+/**
+ * brcmf_sdio_buffrw - SDIO interface function for block data access
+ * @sdiodev: brcmfmac sdio device
+ * @fn: SDIO function number
+ * @write: direction flag
+ * @addr: dongle memory address as source/destination
+ * @pkt: skb pointer
+ *
+ * This function takes the respbonsibility as the interface function to MMC
+ * stack for block data access. It assumes that the skb passed down by the
+ * caller has already been padded and aligned.
+ */
+static int brcmf_sdio_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn,
+ bool write, u32 addr, struct sk_buff_head *pktlist)
+{
+ unsigned int req_sz, func_blk_sz, sg_cnt, sg_data_sz, pkt_offset;
+ unsigned int max_blks, max_req_sz;
+ unsigned short max_seg_sz, seg_sz;
+ unsigned char *pkt_data;
+ struct sk_buff *pkt_next = NULL;
+ struct mmc_request mmc_req;
+ struct mmc_command mmc_cmd;
+ struct mmc_data mmc_dat;
+ struct sg_table st;
+ struct scatterlist *sgl;
+ struct mmc_host *host;
+ int ret = 0;
+
+ if (!pktlist->qlen)
+ return -EINVAL;
+
+ brcmf_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
+ if (brcmf_pm_resume_error(sdiodev))
+ return -EIO;
+
+ /* Single skb use the standard mmc interface */
+ if (pktlist->qlen == 1) {
+ pkt_next = pktlist->next;
+ req_sz = pkt_next->len + 3;
+ req_sz &= (uint)~3;
+
+ if (write)
+ return sdio_memcpy_toio(sdiodev->func[fn], addr,
+ ((u8 *)(pkt_next->data)),
+ req_sz);
+ else if (fn == 1)
+ return sdio_memcpy_fromio(sdiodev->func[fn],
+ ((u8 *)(pkt_next->data)),
+ addr, req_sz);
+ else
+ /* function 2 read is FIFO operation */
+ return sdio_readsb(sdiodev->func[fn],
+ ((u8 *)(pkt_next->data)), addr,
+ req_sz);
+ }
+
+ host = sdiodev->func[fn]->card->host;
+ func_blk_sz = sdiodev->func[fn]->cur_blksize;
+ /* Blocks per command is limited by host count, host transfer
+ * size and the maximum for IO_RW_EXTENDED of 511 blocks.
+ */
+ max_blks = min_t(unsigned int, host->max_blk_count, 511u);
+ max_req_sz = min_t(unsigned int, host->max_req_size,
+ max_blks * func_blk_sz);
+ max_seg_sz = min_t(unsigned short, host->max_segs, SG_MAX_SINGLE_ALLOC);
+ max_seg_sz = min_t(unsigned short, max_seg_sz, pktlist->qlen);
+ seg_sz = pktlist->qlen;
+ pkt_offset = 0;
+ pkt_next = pktlist->next;
+
+ if (sg_alloc_table(&st, max_seg_sz, GFP_KERNEL))
+ return -ENOMEM;
+
+ while (seg_sz) {
+ req_sz = 0;
+ sg_cnt = 0;
+ memset(&mmc_req, 0, sizeof(struct mmc_request));
+ memset(&mmc_cmd, 0, sizeof(struct mmc_command));
+ memset(&mmc_dat, 0, sizeof(struct mmc_data));
+ sgl = st.sgl;
+ /* prep sg table */
+ while (pkt_next != (struct sk_buff *)pktlist) {
+ pkt_data = pkt_next->data + pkt_offset;
+ sg_data_sz = pkt_next->len - pkt_offset;
+ if (sg_data_sz > host->max_seg_size)
+ sg_data_sz = host->max_seg_size;
+ if (sg_data_sz > max_req_sz - req_sz)
+ sg_data_sz = max_req_sz - req_sz;
+
+ sg_set_buf(sgl, pkt_data, sg_data_sz);
+
+ sg_cnt++;
+ sgl = sg_next(sgl);
+ req_sz += sg_data_sz;
+ pkt_offset += sg_data_sz;
+ if (pkt_offset == pkt_next->len) {
+ pkt_offset = 0;
+ pkt_next = pkt_next->next;
+ }
+
+ if (req_sz >= max_req_sz || sg_cnt >= max_seg_sz)
+ break;
+ }
+ seg_sz -= sg_cnt;
+
+ if (req_sz % func_blk_sz != 0) {
+ brcmf_err("sg request length %u is not %u aligned\n",
+ req_sz, func_blk_sz);
+ sg_free_table(&st);
+ return -ENOTBLK;
+ }
+ mmc_dat.sg = st.sgl;
+ mmc_dat.sg_len = sg_cnt;
+ mmc_dat.blksz = func_blk_sz;
+ mmc_dat.blocks = req_sz / func_blk_sz;
+ mmc_dat.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
+ mmc_cmd.opcode = SD_IO_RW_EXTENDED;
+ mmc_cmd.arg = write ? 1<<31 : 0; /* write flag */
+ mmc_cmd.arg |= (fn & 0x7) << 28; /* SDIO func num */
+ mmc_cmd.arg |= 1<<27; /* block mode */
+ /* incrementing addr for function 1 */
+ mmc_cmd.arg |= (fn == 1) ? 1<<26 : 0;
+ mmc_cmd.arg |= (addr & 0x1FFFF) << 9; /* address */
+ mmc_cmd.arg |= mmc_dat.blocks & 0x1FF; /* block count */
+ mmc_cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
+ mmc_req.cmd = &mmc_cmd;
+ mmc_req.data = &mmc_dat;
+ if (fn == 1)
+ addr += req_sz;
+
+ mmc_set_data_timeout(&mmc_dat, sdiodev->func[fn]->card);
+ mmc_wait_for_req(host, &mmc_req);
+
+ ret = mmc_cmd.error ? mmc_cmd.error : mmc_dat.error;
+ if (ret != 0) {
+ brcmf_err("CMD53 sg block %s failed %d\n",
+ write ? "write" : "read", ret);
+ ret = -EIO;
+ break;
+ }
+ }
+
+ sg_free_table(&st);
+
+ return ret;
+}
+
static int brcmf_sdcard_recv_prepare(struct brcmf_sdio_dev *sdiodev, uint fn,
uint flags, uint width, u32 *addr)
{
@@ -355,9 +504,9 @@ int
brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
uint flags, struct sk_buff *pkt)
{
- uint incr_fix;
uint width;
int err = 0;
+ struct sk_buff_head pkt_list;
brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
fn, addr, pkt->len);
@@ -367,9 +516,10 @@ brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
if (err)
goto done;
- incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
- err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_READ,
- fn, addr, pkt);
+ skb_queue_head_init(&pkt_list);
+ skb_queue_tail(&pkt_list, pkt);
+ err = brcmf_sdio_buffrw(sdiodev, fn, false, addr, &pkt_list);
+ skb_dequeue_tail(&pkt_list);
done:
return err;
@@ -391,8 +541,7 @@ int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
goto done;
incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
- err = brcmf_sdioh_request_chain(sdiodev, incr_fix, SDIOH_READ, fn, addr,
- pktq);
+ err = brcmf_sdio_buffrw(sdiodev, fn, false, addr, pktq);
done:
return err;
@@ -424,10 +573,10 @@ int
brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
uint flags, struct sk_buff *pkt)
{
- uint incr_fix;
uint width;
uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
int err = 0;
+ struct sk_buff_head pkt_list;
brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
fn, addr, pkt->len);
@@ -446,13 +595,14 @@ brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
addr &= SBSDIO_SB_OFT_ADDR_MASK;
- incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
if (width == 4)
addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
- err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_WRITE, fn,
- addr, pkt);
+ skb_queue_head_init(&pkt_list);
+ skb_queue_tail(&pkt_list, pkt);
+ err = brcmf_sdio_buffrw(sdiodev, fn, true, addr, &pkt_list);
+ skb_dequeue_tail(&pkt_list);
done:
return err;
@@ -466,6 +616,7 @@ brcmf_sdio_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
struct sk_buff *pkt;
u32 sdaddr;
uint dsize;
+ struct sk_buff_head pkt_list;
dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
pkt = dev_alloc_skb(dsize);
@@ -474,6 +625,7 @@ brcmf_sdio_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
return -EIO;
}
pkt->priority = 0;
+ skb_queue_head_init(&pkt_list);
/* Determine initial transfer parameters */
sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
@@ -501,9 +653,10 @@ brcmf_sdio_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
skb_put(pkt, dsize);
if (write)
memcpy(pkt->data, data, dsize);
- bcmerror = brcmf_sdioh_request_buffer(sdiodev, SDIOH_DATA_INC,
- write, SDIO_FUNC_1,
- sdaddr, pkt);
+ skb_queue_tail(&pkt_list, pkt);
+ bcmerror = brcmf_sdio_buffrw(sdiodev, SDIO_FUNC_1, write,
+ sdaddr, &pkt_list);
+ skb_dequeue_tail(&pkt_list);
if (bcmerror) {
brcmf_err("membytes transfer failed\n");
break;
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-20 06:35:55 +0000