by Erik Stromdahl

[permalink] [raw]

Subject: [RFC 12/12] ath10k: Added sdio support

Initial HIF sdio/mailbox implementation.

Signed-off-by: Erik Stromdahl <[email protected]>
---
drivers/net/wireless/ath/ath10k/Kconfig | 6 +
drivers/net/wireless/ath/ath10k/Makefile | 3 +
drivers/net/wireless/ath/ath10k/sdio.c | 1855 ++++++++++++++++++++++++++++++
drivers/net/wireless/ath/ath10k/sdio.h | 276 +++++
4 files changed, 2140 insertions(+)
create mode 100644 drivers/net/wireless/ath/ath10k/sdio.c
create mode 100644 drivers/net/wireless/ath/ath10k/sdio.h

diff --git a/drivers/net/wireless/ath/ath10k/Kconfig b/drivers/net/wireless/ath/ath10k/Kconfig
index db1ca62..9a03178 100644
--- a/drivers/net/wireless/ath/ath10k/Kconfig
+++ b/drivers/net/wireless/ath/ath10k/Kconfig
@@ -21,6 +21,12 @@ config ATH10K_AHB
---help---
This module adds support for AHB bus

+config ATH10K_SDIO
+ tristate "Atheros ath10k SDIO support (EXPERIMENTAL)"
+ depends on ATH10K && MMC
+ ---help---
+ This module adds support for SDIO/MMC bus
+
config ATH10K_DEBUG
bool "Atheros ath10k debugging"
depends on ATH10K
diff --git a/drivers/net/wireless/ath/ath10k/Makefile b/drivers/net/wireless/ath/ath10k/Makefile
index 930fadd..b0b19a7 100644
--- a/drivers/net/wireless/ath/ath10k/Makefile
+++ b/drivers/net/wireless/ath/ath10k/Makefile
@@ -27,5 +27,8 @@ ath10k_pci-y += pci.o \

ath10k_pci-$(CONFIG_ATH10K_AHB) += ahb.o

+obj-$(CONFIG_ATH10K_SDIO) += ath10k_sdio.o
+ath10k_sdio-y += sdio.o
+
# for tracing framework to find trace.h
CFLAGS_trace.o := -I$(src)
diff --git a/drivers/net/wireless/ath/ath10k/sdio.c b/drivers/net/wireless/ath/ath10k/sdio.c
new file mode 100644
index 0000000..72b0732
--- /dev/null
+++ b/drivers/net/wireless/ath/ath10k/sdio.c
@@ -0,0 +1,1855 @@
+/*
+ * Copyright (c) 2004-2011 Atheros Communications Inc.
+ * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
+ * Copyright (c) 2016 Kapsch Trafficcom AB
+ *
+ * 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/module.h>
+#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 "core.h"
+#include "bmi.h"
+#include "debug.h"
+#include "hif.h"
+#include "htc.h"
+#include "targaddrs.h"
+#include "trace.h"
+#include "sdio.h"
+
+#define CALC_TXRX_PADDED_LEN(ar_sdio, len) \
+ (__ALIGN_MASK((len), (ar_sdio)->mbox_info.block_mask))
+
+static int ath10k_sdio_read_write_sync(struct ath10k *ar, u32 addr, u8 *buf,
+ u32 len, u32 request);
+static int ath10k_sdio_hif_diag_read(struct ath10k *ar, u32 address, void *buf,
+ size_t buf_len);
+static int ath10k_sdio_hif_diag_read32(struct ath10k *ar, u32 address,
+ u32 *value);
+
+/* HIF mbox interrupt handling */
+
+static int ath10k_sdio_mbox_rx_process_packet(struct ath10k_sdio *ar_sdio,
+ struct ath10k_sdio_rx_data *pkt,
+ u32 *next_lkahds, int *n_lkahds)
+{
+ int status = 0;
+ struct ath10k_htc *htc = &ar_sdio->ar->htc;
+ struct sk_buff *skb = pkt->skb;
+ struct ath10k_htc_hdr *htc_hdr = (struct ath10k_htc_hdr *)skb->data;
+ bool trailer_present = htc_hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT;
+ u16 payload_len;
+
+ payload_len = le16_to_cpu(htc_hdr->len);
+
+ if (trailer_present) {
+ u8 *trailer;
+ enum ath10k_htc_ep_id eid;
+
+ trailer = skb->data + sizeof(struct ath10k_htc_hdr) +
+ payload_len - htc_hdr->trailer_len;
+
+ eid = (enum ath10k_htc_ep_id)htc_hdr->eid;
+
+ status = ath10k_htc_process_trailer(htc,
+ trailer,
+ htc_hdr->trailer_len,
+ eid,
+ next_lkahds,
+ n_lkahds);
+ if (status)
+ goto err;
+
+ skb_pull(skb, sizeof(*htc_hdr));
+ skb_trim(skb, skb->len - htc_hdr->trailer_len);
+ }
+
+err:
+ return status;
+}
+
+static inline void ath10k_sdio_mbox_free_rx_pkt(struct ath10k_sdio_rx_data *pkt)
+{
+ dev_kfree_skb(pkt->skb);
+ pkt->skb = NULL;
+ pkt->alloc_len = 0;
+ pkt->act_len = 0;
+}
+
+static inline int ath10k_sdio_mbox_alloc_rx_pkt(struct ath10k_sdio_rx_data *pkt,
+ size_t act_len, size_t full_len,
+ bool part_of_bundle,
+ bool last_in_bundle)
+{
+ pkt->skb = dev_alloc_skb(full_len);
+ if (!pkt->skb)
+ return -ENOMEM;
+
+ pkt->act_len = act_len;
+ pkt->alloc_len = full_len;
+ pkt->part_of_bundle = part_of_bundle;
+ pkt->last_in_bundle = last_in_bundle;
+
+ return 0;
+}
+
+static int ath10k_sdio_mbox_rx_process_packets(struct ath10k_sdio *ar_sdio,
+ u32 lk_ahds[],
+ int *n_lk_ahd)
+{
+ struct ath10k *ar = ar_sdio->ar;
+ struct ath10k_htc *htc = &ar->htc;
+ struct ath10k_sdio_rx_data *pkt;
+ int status = 0, i;
+
+ for (i = 0; i < ar_sdio->n_rx_pkts; i++) {
+ struct ath10k_htc_ep *ep;
+ enum ath10k_htc_ep_id id;
+ u32 *lk_ahds_local = lk_ahds;
+ int *n_lk_ahd_local = n_lk_ahd;
+
+ id = ((struct ath10k_htc_hdr *)&lk_ahds[i])->eid;
+
+ if (id >= ATH10K_HTC_EP_COUNT) {
+ ath10k_err(ar, "Invalid endpoint in look-ahead: %d\n",
+ id);
+ status = -ENOMEM;
+ goto out;
+ }
+
+ ep = &htc->endpoint[id];
+
+ if (ep->service_id == 0) {
+ ath10k_err(ar, "ep %d is not connected !\n", id);
+ status = -ENOMEM;
+ goto out;
+ }
+
+ pkt = &ar_sdio->rx_pkts[i];
+
+ if (pkt->part_of_bundle && !pkt->last_in_bundle) {
+ /* Only read lookahead's from RX trailers
+ * for the last packet in a bundle.
+ */
+ lk_ahds_local = NULL;
+ n_lk_ahd_local = NULL;
+ }
+
+ status = ath10k_sdio_mbox_rx_process_packet(ar_sdio,
+ pkt,
+ lk_ahds_local,
+ n_lk_ahd_local);
+ if (status)
+ goto out;
+
+ ep->ep_ops.ep_rx_complete(ar_sdio->ar, pkt->skb);
+ /* The RX complete handler now owns the skb...*/
+ pkt->skb = NULL;
+ pkt->alloc_len = 0;
+ }
+
+out:
+ /* Free all packets that was not passed on to the RX completion
+ * handler...
+ */
+ for (; i < ar_sdio->n_rx_pkts; i++)
+ ath10k_sdio_mbox_free_rx_pkt(&ar_sdio->rx_pkts[i]);
+
+ return status;
+}
+
+static int alloc_pkt_bundle(struct ath10k *ar,
+ struct ath10k_sdio_rx_data *rx_pkts,
+ struct ath10k_htc_hdr *htc_hdr,
+ size_t full_len, size_t act_len, size_t *bndl_cnt)
+{
+ int i, status = 0;
+
+ *bndl_cnt = (htc_hdr->flags & ATH10K_HTC_FLAG_BUNDLE_MASK) >>
+ ATH10K_HTC_FLAG_BUNDLE_LSB;
+
+ if (*bndl_cnt > HTC_HOST_MAX_MSG_PER_BUNDLE) {
+ ath10k_err(ar,
+ "HTC bundle len %u exceeds maximum %u !\n",
+ le16_to_cpu(htc_hdr->len),
+ HTC_HOST_MAX_MSG_PER_BUNDLE);
+ status = -ENOMEM;
+ goto out;
+ }
+
+ /* Allocate bndl_cnt extra skb's for the bundle.
+ * The package containing the
+ * ATH10K_HTC_FLAG_BUNDLE_MASK flag is not included
+ * in bndl_cnt. The skb for that packet will be
+ * allocated separately.
+ */
+ for (i = 0; i < *bndl_cnt; i++) {
+ status = ath10k_sdio_mbox_alloc_rx_pkt(&rx_pkts[i],
+ act_len,
+ full_len,
+ true,
+ false);
+ if (status)
+ goto out;
+ }
+
+out:
+ return status;
+}
+
+static int ath10k_sdio_mbox_rx_alloc(struct ath10k_sdio *ar_sdio,
+ u32 lk_ahds[], int n_lk_ahds)
+{
+ int status = 0, i;
+ struct ath10k *ar = ar_sdio->ar;
+
+ if (n_lk_ahds > ATH10K_SDIO_MAX_RX_MSGS) {
+ ath10k_err(ar,
+ "The total number of pkgs to be fetched (%u) exceeds maximum %u !\n",
+ n_lk_ahds,
+ ATH10K_SDIO_MAX_RX_MSGS);
+ status = -ENOMEM;
+ goto err;
+ }
+
+ for (i = 0; i < n_lk_ahds; i++) {
+ struct ath10k_htc_hdr *htc_hdr =
+ (struct ath10k_htc_hdr *)&lk_ahds[i];
+ size_t full_len, act_len;
+ bool last_in_bundle = false;
+
+ if (le16_to_cpu(htc_hdr->len) >
+ ATH10K_HTC_MBOX_MAX_PAYLOAD_LENGTH) {
+ ath10k_err(ar,
+ "payload len %d exceeds max htc : %d !\n",
+ le16_to_cpu(htc_hdr->len),
+ ATH10K_HTC_MBOX_MAX_PAYLOAD_LENGTH);
+ status = -ENOMEM;
+ goto err;
+ }
+
+ act_len = le16_to_cpu(htc_hdr->len) + sizeof(*htc_hdr);
+ full_len = CALC_TXRX_PADDED_LEN(ar_sdio, act_len);
+
+ if (full_len > ATH10K_SDIO_MAX_BUFFER_SIZE) {
+ ath10k_warn(ar,
+ "Rx buffer requested with invalid length htc_hdr:eid %d, flags 0x%x, len %d\n",
+ htc_hdr->eid, htc_hdr->flags,
+ le16_to_cpu(htc_hdr->len));
+ status = -EINVAL;
+ goto err;
+ }
+
+ if (htc_hdr->flags & ATH10K_HTC_FLAG_BUNDLE_MASK) {
+ /* HTC header indicates that every packet to follow
+ * has the same padded length so that it can be
+ * optimally fetched as a full bundle.
+ */
+ size_t bndl_cnt;
+
+ status = alloc_pkt_bundle(ar, &ar_sdio->rx_pkts[i],
+ htc_hdr,
+ full_len, act_len, &bndl_cnt);
+
+ n_lk_ahds += bndl_cnt;
+ i += bndl_cnt;
+ /*Next buffer will be the last in the bundle */
+ last_in_bundle = true;
+ }
+
+ /* Allocate skb for packet. If the packet had the
+ * ATH10K_HTC_FLAG_BUNDLE_MASK flag set, all bundled
+ * packet skb's have been allocated in the previous step.
+ */
+ status = ath10k_sdio_mbox_alloc_rx_pkt(&ar_sdio->rx_pkts[i],
+ act_len,
+ full_len,
+ last_in_bundle,
+ last_in_bundle);
+ }
+
+ ar_sdio->n_rx_pkts = i;
+
+ return 0;
+err:
+
+ for (i = 0; i < ATH10K_SDIO_MAX_RX_MSGS; i++) {
+ if (!ar_sdio->rx_pkts[i].alloc_len)
+ break;
+ ath10k_sdio_mbox_free_rx_pkt(&ar_sdio->rx_pkts[i]);
+ }
+
+ return status;
+}
+
+static int ath10k_sdio_mbox_rx_packet(struct ath10k_sdio *ar_sdio,
+ struct ath10k_sdio_rx_data *pkt)
+{
+ struct ath10k *ar = ar_sdio->ar;
+ struct sk_buff *skb = pkt->skb;
+ int status;
+
+ status = ath10k_sdio_read_write_sync(ar,
+ ar_sdio->mbox_info.htc_addr,
+ skb->data, pkt->alloc_len,
+ HIF_RD_SYNC_BLOCK_FIX);
+
+ pkt->status = status;
+ if (!status)
+ skb_put(skb, pkt->act_len);
+
+ return status;
+}
+
+static int ath10k_sdio_mbox_rx_fetch(struct ath10k_sdio *ar_sdio)
+{
+ int i, status = 0;
+
+ for (i = 0; i < ar_sdio->n_rx_pkts; i++) {
+ status = ath10k_sdio_mbox_rx_packet(ar_sdio,
+ &ar_sdio->rx_pkts[i]);
+ if (status)
+ goto err;
+ }
+
+ return 0;
+err:
+ /* Free all packets that was not successfully fetched. */
+ for (; i < ar_sdio->n_rx_pkts; i++)
+ ath10k_sdio_mbox_free_rx_pkt(&ar_sdio->rx_pkts[i]);
+
+ return status;
+}
+
+/* Disable packet reception (used in case the host runs out of buffers)
+ * using the interrupt enable registers through the host I/F
+ */
+static int ath10k_sdio_hif_rx_control(struct ath10k_sdio *ar_sdio,
+ bool enable_rx)
+{
+ int status = 0;
+ struct ath10k_sdio_irq_enable_reg regs;
+ struct ath10k_sdio_irq_data *irq_data = &ar_sdio->irq_data;
+
+ ath10k_dbg(ar_sdio->ar, ATH10K_DBG_SDIO, "hif rx %s\n",
+ enable_rx ? "enable" : "disable");
+
+ spin_lock_bh(&irq_data->lock);
+
+ if (enable_rx)
+ irq_data->irq_en_reg.int_status_en |=
+ SM(0x01, MBOX_INT_STATUS_ENABLE_MBOX_DATA);
+ else
+ irq_data->irq_en_reg.int_status_en &=
+ ~SM(0x01, MBOX_INT_STATUS_ENABLE_MBOX_DATA);
+
+ regs = irq_data->irq_en_reg;
+
+ spin_unlock_bh(&irq_data->lock);
+
+ status = ath10k_sdio_read_write_sync(ar_sdio->ar,
+ MBOX_INT_STATUS_ENABLE_ADDRESS,
+ &regs.int_status_en, sizeof(regs),
+ HIF_WR_SYNC_BYTE_INC);
+
+ return status;
+}
+
+int ath10k_sdio_mbox_rxmsg_pending_handler(struct ath10k_sdio *ar_sdio,
+ u32 msg_lk_ahd, bool *done)
+{
+ struct ath10k *ar = ar_sdio->ar;
+ int status = 0;
+ u32 lk_ahds[ATH10K_SDIO_MAX_RX_MSGS];
+ int n_lk_ahds = 1;
+
+ *done = true;
+
+ /* Copy the lookahead obtained from the HTC register table into our
+ * temp array as a start value.
+ */
+ lk_ahds[0] = msg_lk_ahd;
+
+ for (;;) {
+ /* Try to allocate as many HTC RX packets indicated by
+ * n_lk_ahds.
+ */
+ status = ath10k_sdio_mbox_rx_alloc(ar_sdio, lk_ahds,
+ n_lk_ahds);
+ if (status)
+ break;
+
+ if (ar_sdio->n_rx_pkts >= 2)
+ /* A recv bundle was detected, force IRQ status
+ * re-check again.
+ */
+ *done = false;
+
+ status = ath10k_sdio_mbox_rx_fetch(ar_sdio);
+
+ /* Process fetched packets. This will potentially update
+ * n_lk_ahds depending on if the packets contain lookahead
+ * reports.
+ */
+ n_lk_ahds = 0;
+ status = ath10k_sdio_mbox_rx_process_packets(ar_sdio,
+ lk_ahds,
+ &n_lk_ahds);
+
+ if (!n_lk_ahds || status)
+ break;
+
+ /* For SYNCH processing, if we get here, we are running
+ * through the loop again due to updated lookaheads. Set
+ * flag that we should re-check IRQ status registers again
+ * before leaving IRQ processing, this can net better
+ * performance in high throughput situations.
+ */
+ *done = false;
+ }
+
+ if (status && (status != -ECANCELED))
+ ath10k_err(ar, "failed to get pending recv messages: %d\n",
+ status);
+
+ if (atomic_read(&ar_sdio->stopping)) {
+ ath10k_warn(ar, "host is going to stop. Turning of RX\n");
+ ath10k_sdio_hif_rx_control(ar_sdio, false);
+ }
+
+ return status;
+}
+
+static int ath10k_sdio_mbox_proc_dbg_intr(struct ath10k_sdio *ar_sdio)
+{
+ int ret;
+ u32 dummy;
+ struct ath10k *ar = ar_sdio->ar;
+
+ ath10k_warn(ar, "firmware crashed\n");
+
+ /* read counter to clear the interrupt, the debug error interrupt is
+ * counter 0.
+ */
+ ret = ath10k_sdio_read_write_sync(ar, MBOX_COUNT_DEC_ADDRESS,
+ (u8 *)&dummy, 4,
+ HIF_RD_SYNC_BYTE_INC);
+ if (ret)
+ ath10k_warn(ar, "Failed to clear debug interrupt: %d\n", ret);
+
+ return ret;
+}
+
+static int ath10k_sdio_mbox_proc_counter_intr(struct ath10k_sdio *ar_sdio)
+{
+ u8 counter_int_status;
+ struct ath10k_sdio_irq_data *irq_data = &ar_sdio->irq_data;
+
+ counter_int_status = irq_data->irq_proc_reg.counter_int_status &
+ irq_data->irq_en_reg.cntr_int_status_en;
+
+ /* NOTE: other modules like GMBOX may use the counter interrupt for
+ * credit flow control on other counters, we only need to check for
+ * the debug assertion counter interrupt.
+ */
+ if (counter_int_status & ATH10K_SDIO_TARGET_DEBUG_INTR_MASK)
+ return ath10k_sdio_mbox_proc_dbg_intr(ar_sdio);
+
+ return 0;
+}
+
+static int ath10k_sdio_mbox_proc_err_intr(struct ath10k_sdio *ar_sdio)
+{
+ int status;
+ u8 error_int_status;
+ u8 reg_buf[4];
+ struct ath10k_sdio_irq_data *irq_data = &ar_sdio->irq_data;
+ struct ath10k *ar = ar_sdio->ar;
+
+ ath10k_dbg(ar, ATH10K_DBG_SDIO, "error interrupt\n");
+
+ error_int_status = irq_data->irq_proc_reg.error_int_status & 0x0F;
+ if (!error_int_status) {
+ WARN_ON(1);
+ return -EIO;
+ }
+
+ ath10k_dbg(ar, ATH10K_DBG_SDIO,
+ "valid interrupt source(s) in ERROR_INT_STATUS: 0x%x\n",
+ error_int_status);
+
+ if (MS(error_int_status, MBOX_ERROR_INT_STATUS_WAKEUP))
+ ath10k_dbg(ar, ATH10K_DBG_SDIO, "error : wakeup\n");
+
+ if (MS(error_int_status, MBOX_ERROR_INT_STATUS_RX_UNDERFLOW))
+ ath10k_err(ar, "rx underflow\n");
+
+ if (MS(error_int_status, MBOX_ERROR_INT_STATUS_TX_OVERFLOW))
+ ath10k_err(ar, "tx overflow\n");
+
+ /* Clear the interrupt */
+ irq_data->irq_proc_reg.error_int_status &= ~error_int_status;
+
+ /* set W1C value to clear the interrupt, this hits the register first */
+ reg_buf[0] = error_int_status;
+ reg_buf[1] = 0;
+ reg_buf[2] = 0;
+ reg_buf[3] = 0;
+
+ status = ath10k_sdio_read_write_sync(ar,
+ MBOX_ERROR_INT_STATUS_ADDRESS,
+ reg_buf, 4, HIF_WR_SYNC_BYTE_FIX);
+
+ WARN_ON(status);
+
+ return status;
+}
+
+static int ath10k_sdio_mbox_proc_cpu_intr(struct ath10k_sdio *ar_sdio)
+{
+ int status;
+ struct ath10k_sdio_irq_data *irq_data = &ar_sdio->irq_data;
+ struct ath10k *ar = ar_sdio->ar;
+ u8 cpu_int_status, reg_buf[4];
+
+ cpu_int_status = irq_data->irq_proc_reg.cpu_int_status &
+ irq_data->irq_en_reg.cpu_int_status_en;
+ if (!cpu_int_status) {
+ WARN_ON(1);
+ return -EIO;
+ }
+
+ /* Clear the interrupt */
+ irq_data->irq_proc_reg.cpu_int_status &= ~cpu_int_status;
+
+ /* Set up the register transfer buffer to hit the register 4 times ,
+ * this is done to make the access 4-byte aligned to mitigate issues
+ * with host bus interconnects that restrict bus transfer lengths to
+ * be a multiple of 4-bytes.
+ */
+
+ /* set W1C value to clear the interrupt, this hits the register first */
+ reg_buf[0] = cpu_int_status;
+ /* the remaining are set to zero which have no-effect */
+ reg_buf[1] = 0;
+ reg_buf[2] = 0;
+ reg_buf[3] = 0;
+
+ status = ath10k_sdio_read_write_sync(ar,
+ MBOX_CPU_INT_STATUS_ADDRESS,
+ reg_buf, 4, HIF_WR_SYNC_BYTE_FIX);
+
+ WARN_ON(status);
+
+ return status;
+}
+
+/* process pending interrupts synchronously */
+static int ath10k_sdio_mbox_proc_pending_irqs(struct ath10k_sdio *ar_sdio,
+ bool *done)
+{
+ struct ath10k_sdio_irq_data *irq_data = &ar_sdio->irq_data;
+ struct ath10k *ar = ar_sdio->ar;
+ struct ath10k_sdio_irq_proc_registers *rg;
+ int status = 0;
+ u8 host_int_status = 0;
+ u32 lk_ahd = 0;
+ u8 htc_mbox = 1 << ATH10K_HTC_MAILBOX;
+
+ /* NOTE: HIF implementation guarantees that the context of this
+ * call allows us to perform SYNCHRONOUS I/O, that is we can block,
+ * sleep or call any API that can block or switch thread/task
+ * contexts. This is a fully schedulable context.
+ */
+
+ /* Process pending intr only when int_status_en is clear, it may
+ * result in unnecessary bus transaction otherwise. Target may be
+ * unresponsive at the time.
+ */
+ if (irq_data->irq_en_reg.int_status_en) {
+ /* Read the first sizeof(struct ath10k_irq_proc_registers)
+ * bytes of the HTC register table. This
+ * will yield us the value of different int status
+ * registers and the lookahead registers.
+ */
+ status = ath10k_sdio_read_write_sync(
+ ar,
+ MBOX_HOST_INT_STATUS_ADDRESS,
+ (u8 *)&irq_data->irq_proc_reg,
+ sizeof(irq_data->irq_proc_reg),
+ HIF_RD_SYNC_BYTE_INC);
+ if (status)
+ goto out;
+
+ /* Update only those registers that are enabled */
+ host_int_status = irq_data->irq_proc_reg.host_int_status &
+ irq_data->irq_en_reg.int_status_en;
+
+ /* Look at mbox status */
+ if (host_int_status & htc_mbox) {
+ /* Mask out pending mbox value, we use look ahead as
+ * the real flag for mbox processing.
+ */
+ host_int_status &= ~htc_mbox;
+ if (irq_data->irq_proc_reg.rx_lkahd_valid & htc_mbox) {
+ rg = &irq_data->irq_proc_reg;
+ lk_ahd = le32_to_cpu(rg->rx_lkahd[ATH10K_HTC_MAILBOX]);
+ if (!lk_ahd)
+ ath10k_err(ar, "lookahead is zero!\n");
+ }
+ }
+ }
+
+ if (!host_int_status && !lk_ahd) {
+ *done = true;
+ goto out;
+ }
+
+ if (lk_ahd) {
+ ath10k_dbg(ar, ATH10K_DBG_SDIO,
+ "pending mailbox msg, lk_ahd: 0x%08X\n", lk_ahd);
+
+ status = ath10k_sdio_mbox_rxmsg_pending_handler(ar_sdio,
+ lk_ahd, done);
+ if (status)
+ goto out;
+ }
+
+ /* now, handle the rest of the interrupts */
+ ath10k_dbg(ar, ATH10K_DBG_SDIO,
+ "valid interrupt source(s) for other interrupts: 0x%x\n",
+ host_int_status);
+
+ if (MS(host_int_status, MBOX_HOST_INT_STATUS_CPU)) {
+ /* CPU Interrupt */
+ status = ath10k_sdio_mbox_proc_cpu_intr(ar_sdio);
+ if (status)
+ goto out;
+ }
+
+ if (MS(host_int_status, MBOX_HOST_INT_STATUS_ERROR)) {
+ /* Error Interrupt */
+ status = ath10k_sdio_mbox_proc_err_intr(ar_sdio);
+ if (status)
+ goto out;
+ }
+
+ if (MS(host_int_status, MBOX_HOST_INT_STATUS_COUNTER))
+ /* Counter Interrupt */
+ status = ath10k_sdio_mbox_proc_counter_intr(ar_sdio);
+
+out:
+ /* An optimization to bypass reading the IRQ status registers
+ * unecessarily which can re-wake the target, if upper layers
+ * determine that we are in a low-throughput mode, we can rely on
+ * taking another interrupt rather than re-checking the status
+ * registers which can re-wake the target.
+ *
+ * NOTE : for host interfaces that makes use of detecting pending
+ * mbox messages at hif can not use this optimization due to
+ * possible side effects, SPI requires the host to drain all
+ * messages from the mailbox before exiting the ISR routine.
+ */
+
+ ath10k_dbg(ar, ATH10K_DBG_SDIO,
+ "%s: (done:%d, status=%d)\n", __func__, *done, status);
+
+ return status;
+}
+
+/* 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 inline enum ath10k_htc_ep_id pipe_id_to_eid(u8 pipe_id)
+{
+ return (enum ath10k_htc_ep_id)pipe_id;
+}
+
+static void ath10k_sdio_set_mbox_info(struct ath10k_sdio *ar_sdio)
+{
+ struct ath10k_mbox_info *mbox_info = &ar_sdio->mbox_info;
+ u16 device = ar_sdio->func->device;
+
+ mbox_info->htc_addr = ATH10K_HIF_MBOX_BASE_ADDR;
+ mbox_info->block_size = ATH10K_HIF_MBOX_BLOCK_SIZE;
+ mbox_info->block_mask = ATH10K_HIF_MBOX_BLOCK_SIZE - 1;
+ mbox_info->gmbox_addr = ATH10K_HIF_GMBOX_BASE_ADDR;
+ mbox_info->gmbox_sz = ATH10K_HIF_GMBOX_WIDTH;
+
+ mbox_info->ext_info[0].htc_ext_addr = ATH10K_HIF_MBOX0_EXT_BASE_ADDR;
+
+ if ((device & ATH10K_MANUFACTURER_ID_REV_MASK) < 4)
+ mbox_info->ext_info[0].htc_ext_sz = ATH10K_HIF_MBOX0_EXT_WIDTH;
+ else
+ /* from rome 2.0(0x504), the width has been extended
+ * to 56K
+ */
+ mbox_info->ext_info[0].htc_ext_sz =
+ ATH10K_HIF_MBOX0_EXT_WIDTH_ROME_2_0;
+
+ mbox_info->ext_info[1].htc_ext_addr =
+ mbox_info->ext_info[0].htc_ext_addr +
+ mbox_info->ext_info[0].htc_ext_sz +
+ ATH10K_HIF_MBOX_DUMMY_SPACE_SIZE;
+ mbox_info->ext_info[1].htc_ext_sz = ATH10K_HIF_MBOX1_EXT_WIDTH;
+}
+
+static inline void ath10k_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 ath10k_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));
+ ath10k_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 ath10k_sdio_func0_cmd52_rd_byte(struct mmc_card *card,
+ unsigned int address,
+ unsigned char *byte)
+{
+ int ret;
+ struct mmc_command io_cmd;
+
+ memset(&io_cmd, 0, sizeof(io_cmd));
+ ath10k_sdio_set_cmd52_arg(&io_cmd.arg, 0, 0, address, 0);
+ io_cmd.opcode = SD_IO_RW_DIRECT;
+ io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
+
+ ret = mmc_wait_for_cmd(card->host, &io_cmd, 0);
+ if (!ret)
+ *byte = io_cmd.resp[0];
+
+ return ret;
+}
+
+static int ath10k_sdio_io(struct ath10k_sdio *ar_sdio, u32 request, u32 addr,
+ u8 *buf, u32 len)
+{
+ int ret = 0;
+ struct sdio_func *func = ar_sdio->func;
+ struct ath10k *ar = ar_sdio->ar;
+
+ sdio_claim_host(func);
+
+ if (request & HIF_WRITE) {
+ 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);
+ }
+
+ sdio_release_host(func);
+
+ ath10k_dbg(ar, ATH10K_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);
+ ath10k_dbg_dump(ar, ATH10K_DBG_SDIO_DUMP, NULL,
+ request & HIF_WRITE ? "sdio wr " : "sdio rd ",
+ buf, len);
+
+ return ret;
+}
+
+static struct ath10k_sdio_bus_request
+*ath10k_sdio_alloc_busreq(struct ath10k_sdio *ar_sdio)
+{
+ struct ath10k_sdio_bus_request *bus_req;
+
+ spin_lock_bh(&ar_sdio->lock);
+
+ if (list_empty(&ar_sdio->bus_req_freeq)) {
+ spin_unlock_bh(&ar_sdio->lock);
+ return NULL;
+ }
+
+ bus_req = list_first_entry(&ar_sdio->bus_req_freeq,
+ struct ath10k_sdio_bus_request, list);
+ list_del(&bus_req->list);
+
+ spin_unlock_bh(&ar_sdio->lock);
+
+ return bus_req;
+}
+
+static void ath10k_sdio_free_bus_req(struct ath10k_sdio *ar_sdio,
+ struct ath10k_sdio_bus_request *bus_req)
+{
+ spin_lock_bh(&ar_sdio->lock);
+ list_add_tail(&bus_req->list, &ar_sdio->bus_req_freeq);
+ spin_unlock_bh(&ar_sdio->lock);
+}
+
+static int ath10k_sdio_read_write_sync(struct ath10k *ar, u32 addr, u8 *buf,
+ u32 len, u32 request)
+{
+ struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar);
+ u8 *tbuf = NULL;
+ int ret;
+ bool bounced = false;
+
+ if (request & HIF_BLOCK_BASIS)
+ len = round_down(len, ar_sdio->mbox_info.block_size);
+
+ if (buf_needs_bounce(buf)) {
+ if (!ar_sdio->dma_buffer)
+ return -ENOMEM;
+ /* FIXME: I am not sure if it is always correct to assume
+ * that the SDIO irq is a "fake" irq and sleep is possible.
+ * (this function will get called from
+ * ath10k_sdio_irq_handler
+ */
+ mutex_lock(&ar_sdio->dma_buffer_mutex);
+ tbuf = ar_sdio->dma_buffer;
+
+ if (request & HIF_WRITE)
+ memcpy(tbuf, buf, len);
+
+ bounced = true;
+ } else {
+ tbuf = buf;
+ }
+
+ ret = ath10k_sdio_io(ar_sdio, request, addr, tbuf, len);
+ if ((request & HIF_READ) && bounced)
+ memcpy(buf, tbuf, len);
+
+ if (bounced)
+ mutex_unlock(&ar_sdio->dma_buffer_mutex);
+
+ return ret;
+}
+
+static void __ath10k_sdio_write_async(struct ath10k_sdio *ar_sdio,
+ struct ath10k_sdio_bus_request *req)
+{
+ int status;
+ struct ath10k_htc_ep *ep;
+ struct sk_buff *skb;
+
+ skb = req->skb;
+ status = ath10k_sdio_read_write_sync(ar_sdio->ar, req->address,
+ skb->data, req->len,
+ req->request);
+ ep = &ar_sdio->ar->htc.endpoint[req->eid];
+ ath10k_htc_notify_tx_completion(ep, skb);
+ ath10k_sdio_free_bus_req(ar_sdio, req);
+}
+
+static void ath10k_sdio_write_async_work(struct work_struct *work)
+{
+ struct ath10k_sdio *ar_sdio;
+ struct ath10k_sdio_bus_request *req, *tmp_req;
+
+ ar_sdio = container_of(work, struct ath10k_sdio, wr_async_work);
+
+ spin_lock_bh(&ar_sdio->wr_async_lock);
+ list_for_each_entry_safe(req, tmp_req, &ar_sdio->wr_asyncq, list) {
+ list_del(&req->list);
+ spin_unlock_bh(&ar_sdio->wr_async_lock);
+ __ath10k_sdio_write_async(ar_sdio, req);
+ spin_lock_bh(&ar_sdio->wr_async_lock);
+ }
+ spin_unlock_bh(&ar_sdio->wr_async_lock);
+}
+
+static void ath10k_sdio_irq_handler(struct sdio_func *func)
+{
+ int status = 0;
+ unsigned long timeout;
+ struct ath10k_sdio *ar_sdio;
+ bool done = false;
+
+ ar_sdio = sdio_get_drvdata(func);
+ atomic_set(&ar_sdio->irq_handling, 1);
+
+ /* Release the host during interrupts so we can pick it back up when
+ * we process commands.
+ */
+ sdio_release_host(ar_sdio->func);
+
+ timeout = jiffies + ATH10K_SDIO_HIF_COMMUNICATION_TIMEOUT_HZ;
+ while (time_before(jiffies, timeout) && !done) {
+ status = ath10k_sdio_mbox_proc_pending_irqs(ar_sdio, &done);
+ if (status)
+ break;
+ }
+
+ sdio_claim_host(ar_sdio->func);
+
+ atomic_set(&ar_sdio->irq_handling, 0);
+ wake_up(&ar_sdio->irq_wq);
+
+ WARN_ON(status && status != -ECANCELED);
+}
+
+static int ath10k_sdio_hif_disable_intrs(struct ath10k_sdio *ar_sdio)
+{
+ int ret;
+ struct ath10k_sdio_irq_enable_reg regs;
+ struct ath10k_sdio_irq_data *irq_data = &ar_sdio->irq_data;
+
+ memset(&regs, 0, sizeof(regs));
+
+ ret = ath10k_sdio_read_write_sync(ar_sdio->ar,
+ MBOX_INT_STATUS_ENABLE_ADDRESS,
+ &regs.int_status_en, sizeof(regs),
+ HIF_WR_SYNC_BYTE_INC);
+ if (ret) {
+ ath10k_err(ar_sdio->ar, "Unable to disable sdio interrupts\n");
+ return ret;
+ }
+
+ spin_lock_bh(&irq_data->lock);
+ irq_data->irq_en_reg = regs;
+ spin_unlock_bh(&irq_data->lock);
+
+ return 0;
+}
+
+static int ath10k_sdio_hif_power_up(struct ath10k *ar)
+{
+ struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar);
+ struct sdio_func *func = ar_sdio->func;
+ int ret = 0;
+
+ if (!ar_sdio->is_disabled)
+ return 0;
+
+ ath10k_dbg(ar, ATH10K_DBG_BOOT, "sdio power on\n");
+
+ sdio_claim_host(func);
+
+ ret = sdio_enable_func(func);
+ if (ret) {
+ ath10k_err(ar, "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
+ * 20 ms but let's be conservative here.
+ */
+ msleep(20);
+
+ ar_sdio->is_disabled = false;
+
+ ret = ath10k_sdio_hif_disable_intrs(ar_sdio);
+
+ return ret;
+}
+
+static void ath10k_sdio_hif_power_down(struct ath10k *ar)
+{
+ struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar);
+ int ret;
+
+ if (ar_sdio->is_disabled)
+ return;
+
+ ath10k_dbg(ar, ATH10K_DBG_BOOT, "sdio power off\n");
+
+ /* Disable the card */
+ sdio_claim_host(ar_sdio->func);
+ ret = sdio_disable_func(ar_sdio->func);
+ sdio_release_host(ar_sdio->func);
+
+ if (ret)
+ ath10k_dbg(ar, ATH10K_DBG_BOOT,
+ "Unable to disable sdio: %d\n", ret);
+
+ ar_sdio->is_disabled = true;
+}
+
+int ath10k_sdio_hif_tx_sg(struct ath10k *ar, u8 pipe_id,
+ struct ath10k_hif_sg_item *items, int n_items)
+{
+ int i;
+ u32 address;
+ struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar);
+ struct ath10k_sdio_bus_request *bus_req;
+
+ bus_req = ath10k_sdio_alloc_busreq(ar_sdio);
+
+ if (WARN_ON_ONCE(!bus_req))
+ return -ENOMEM;
+
+ for (i = 0; i < n_items; i++) {
+ bus_req->skb = items[i].transfer_context;
+ bus_req->request = HIF_WRITE;
+ bus_req->eid = pipe_id_to_eid(pipe_id);
+ /* Write TX data to the end of the mbox address space */
+ address = ar_sdio->mbox_addr[bus_req->eid] +
+ ar_sdio->mbox_size[bus_req->eid] - bus_req->skb->len;
+ bus_req->address = address;
+ bus_req->len = CALC_TXRX_PADDED_LEN(ar_sdio, bus_req->skb->len);
+
+ spin_lock_bh(&ar_sdio->wr_async_lock);
+ list_add_tail(&bus_req->list, &ar_sdio->wr_asyncq);
+ spin_unlock_bh(&ar_sdio->wr_async_lock);
+ }
+
+ queue_work(ar_sdio->workqueue, &ar_sdio->wr_async_work);
+
+ return 0;
+}
+
+static int ath10k_sdio_hif_enable_intrs(struct ath10k_sdio *ar_sdio)
+{
+ struct ath10k_sdio_irq_enable_reg regs;
+ int status;
+ struct ath10k_sdio_irq_data *irq_data = &ar_sdio->irq_data;
+
+ memset(&regs, 0, sizeof(regs));
+
+ /* Enable all but CPU interrupts */
+ regs.int_status_en = SM(0x01, MBOX_INT_STATUS_ENABLE_ERROR) |
+ SM(0x01, MBOX_INT_STATUS_ENABLE_CPU) |
+ SM(0x01, MBOX_INT_STATUS_ENABLE_COUNTER);
+
+ /* NOTE: There are some cases where HIF can do detection of
+ * pending mbox messages which is disabled now.
+ */
+ regs.int_status_en |= SM(0x01, MBOX_INT_STATUS_ENABLE_MBOX_DATA);
+
+ /* Set up the CPU Interrupt status Register */
+ regs.cpu_int_status_en = 0;
+
+ /* Set up the Error Interrupt status Register */
+ regs.err_int_status_en =
+ SM(0x01, MBOX_ERROR_STATUS_ENABLE_RX_UNDERFLOW) |
+ SM(0x01, MBOX_ERROR_STATUS_ENABLE_TX_OVERFLOW);
+
+ /* Enable Counter interrupt status register to get fatal errors for
+ * debugging.
+ */
+ regs.cntr_int_status_en = SM(ATH10K_SDIO_TARGET_DEBUG_INTR_MASK,
+ MBOX_COUNTER_INT_STATUS_ENABLE_BIT);
+
+ status = ath10k_sdio_read_write_sync(ar_sdio->ar,
+ MBOX_INT_STATUS_ENABLE_ADDRESS,
+ &regs.int_status_en, sizeof(regs),
+ HIF_WR_SYNC_BYTE_INC);
+ if (status) {
+ ath10k_err(ar_sdio->ar,
+ "failed to update interrupt ctl reg err: %d\n",
+ status);
+ return status;
+ }
+
+ spin_lock_bh(&irq_data->lock);
+ irq_data->irq_en_reg = regs;
+ spin_unlock_bh(&irq_data->lock);
+
+ return 0;
+}
+
+static int ath10k_sdio_hif_start(struct ath10k *ar)
+{
+ int ret;
+ struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar);
+ u32 addr, val;
+
+ addr = host_interest_item_address(HI_ITEM(hi_acs_flags));
+
+ ret = ath10k_sdio_hif_diag_read32(ar, addr, &val);
+ if (ret) {
+ ath10k_err(ar, "Unable to read diag mem: %d\n", ret);
+ goto out;
+ }
+
+ if (val & HI_ACS_FLAGS_SDIO_SWAP_MAILBOX_FW_ACK) {
+ ath10k_dbg(ar, ATH10K_DBG_SDIO,
+ "Mailbox SWAP Service is enabled\n");
+ ar_sdio->swap_mbox = true;
+ }
+
+ /* eid 0 always uses the lower part of the extended mailbox address
+ * space (ext_info[0].htc_ext_addr).
+ */
+ ar_sdio->mbox_addr[0] = ar_sdio->mbox_info.ext_info[0].htc_ext_addr;
+ ar_sdio->mbox_size[0] = ar_sdio->mbox_info.ext_info[0].htc_ext_sz;
+
+ sdio_claim_host(ar_sdio->func);
+
+ /* Register the isr */
+ ret = sdio_claim_irq(ar_sdio->func, ath10k_sdio_irq_handler);
+ if (ret) {
+ ath10k_err(ar, "Failed to claim sdio irq: %d\n", ret);
+ sdio_release_host(ar_sdio->func);
+ goto out;
+ }
+
+ sdio_release_host(ar_sdio->func);
+
+ ret = ath10k_sdio_hif_enable_intrs(ar_sdio);
+ if (ret)
+ ath10k_err(ar, "Failed to enable sdio interrupts: %d\n", ret);
+
+out:
+ return ret;
+}
+
+static bool ath10k_sdio_is_on_irq(struct ath10k *ar)
+{
+ struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar);
+
+ return !atomic_read(&ar_sdio->irq_handling);
+}
+
+static void ath10k_sdio_irq_disable(struct ath10k *ar)
+{
+ struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar);
+ int ret;
+
+ sdio_claim_host(ar_sdio->func);
+
+ atomic_set(&ar_sdio->stopping, 1);
+
+ if (atomic_read(&ar_sdio->irq_handling)) {
+ sdio_release_host(ar_sdio->func);
+
+ ret = wait_event_interruptible(ar_sdio->irq_wq,
+ ath10k_sdio_is_on_irq(ar));
+ if (ret)
+ return;
+
+ sdio_claim_host(ar_sdio->func);
+ }
+
+ ret = sdio_release_irq(ar_sdio->func);
+ if (ret)
+ ath10k_err(ar, "Failed to release sdio irq: %d\n", ret);
+
+ sdio_release_host(ar_sdio->func);
+}
+
+static int ath10k_sdio_config(struct ath10k_sdio *ar_sdio)
+{
+ struct ath10k *ar = ar_sdio->ar;
+ struct sdio_func *func = ar_sdio->func;
+ unsigned char byte, asyncintdelay = 2;
+ int ret;
+
+ ath10k_dbg(ar, ATH10K_DBG_BOOT, "SDIO configuration\n");
+
+ sdio_claim_host(func);
+
+ byte = 0;
+ ret = ath10k_sdio_func0_cmd52_rd_byte(func->card,
+ SDIO_CCCR_DRIVE_STRENGTH,
+ &byte);
+
+ byte = (byte & (~(SDIO_DRIVE_DTSx_MASK << SDIO_DRIVE_DTSx_SHIFT))) |
+ SDIO_DTSx_SET_TYPE_D;
+
+ ret = ath10k_sdio_func0_cmd52_wr_byte(func->card,
+ SDIO_CCCR_DRIVE_STRENGTH,
+ byte);
+
+ byte = 0;
+ ret = ath10k_sdio_func0_cmd52_rd_byte(
+ func->card,
+ CCCR_SDIO_DRIVER_STRENGTH_ENABLE_ADDR,
+ &byte);
+
+ byte |= (CCCR_SDIO_DRIVER_STRENGTH_ENABLE_A |
+ CCCR_SDIO_DRIVER_STRENGTH_ENABLE_C |
+ CCCR_SDIO_DRIVER_STRENGTH_ENABLE_D);
+
+ ret = ath10k_sdio_func0_cmd52_wr_byte(
+ func->card,
+ CCCR_SDIO_DRIVER_STRENGTH_ENABLE_ADDR,
+ byte);
+ if (ret) {
+ ath10k_err(ar, "Failed to enable driver strengt\n");
+ goto out;
+ }
+
+ byte = 0;
+ ret = ath10k_sdio_func0_cmd52_rd_byte(func->card,
+ CCCR_SDIO_IRQ_MODE_REG_SDIO3,
+ &byte);
+
+ byte |= SDIO_IRQ_MODE_ASYNC_4BIT_IRQ_SDIO3;
+
+ ret = ath10k_sdio_func0_cmd52_wr_byte(func->card,
+ CCCR_SDIO_IRQ_MODE_REG_SDIO3,
+ byte);
+ if (ret) {
+ ath10k_err(ar, "Failed to enable 4-bit async irq mode %d\n",
+ ret);
+ goto out;
+ }
+
+ byte = 0;
+ ret = ath10k_sdio_func0_cmd52_rd_byte(func->card,
+ CCCR_SDIO_ASYNC_INT_DELAY_ADDRESS,
+ &byte);
+
+ byte = (byte & ~CCCR_SDIO_ASYNC_INT_DELAY_MASK) |
+ ((asyncintdelay << CCCR_SDIO_ASYNC_INT_DELAY_LSB) &
+ CCCR_SDIO_ASYNC_INT_DELAY_MASK);
+
+ ret = ath10k_sdio_func0_cmd52_wr_byte(func->card,
+ CCCR_SDIO_ASYNC_INT_DELAY_ADDRESS,
+ byte);
+
+ /* give us some time to enable, in ms */
+ func->enable_timeout = 100;
+
+ ret = sdio_set_block_size(func, ar_sdio->mbox_info.block_size);
+ if (ret) {
+ ath10k_err(ar, "Set sdio block size %d failed: %d)\n",
+ ar_sdio->mbox_info.block_size, ret);
+ goto out;
+ }
+
+out:
+ sdio_release_host(func);
+
+ return ret;
+}
+
+/* set the window address register (using 4-byte register access ). */
+static int ath10k_set_addrwin_reg(struct ath10k *ar, u32 reg_addr, u32 addr)
+{
+ int status;
+
+ status = ath10k_sdio_read_write_sync(ar, reg_addr, (u8 *)(&addr),
+ 4, HIF_WR_SYNC_BYTE_INC);
+
+ if (status) {
+ ath10k_err(ar, "%s: failed to write 0x%x to window reg: 0x%X\n",
+ __func__, addr, reg_addr);
+ return status;
+ }
+
+ return 0;
+}
+
+static int ath10k_sdio_hif_diag_read32(struct ath10k *ar, u32 address,
+ u32 *value)
+{
+ __le32 val = 0;
+ int ret;
+
+ ret = ath10k_sdio_hif_diag_read(ar, address, &val, sizeof(val));
+ *value = __le32_to_cpu(val);
+
+ return ret;
+}
+
+static int ath10k_sdio_hif_diag_read(struct ath10k *ar, u32 address, void *buf,
+ size_t buf_len)
+{
+ int status;
+
+ /* set window register to start read cycle */
+ status = ath10k_set_addrwin_reg(ar, MBOX_WINDOW_READ_ADDR_ADDRESS,
+ address);
+
+ if (status)
+ return status;
+
+ /* read the data */
+ status = ath10k_sdio_read_write_sync(ar, MBOX_WINDOW_DATA_ADDRESS,
+ (u8 *)buf, buf_len,
+ HIF_RD_SYNC_BYTE_INC);
+ if (status) {
+ ath10k_err(ar, "%s: failed to read from window data addr\n",
+ __func__);
+ return status;
+ }
+
+ return status;
+}
+
+static int ath10k_sdio_diag_write_mem(struct ath10k *ar, u32 address,
+ const void *data, int nbytes)
+{
+ int status;
+
+ /* set write data */
+ status = ath10k_sdio_read_write_sync(ar, MBOX_WINDOW_DATA_ADDRESS,
+ (u8 *)data, nbytes,
+ HIF_WR_SYNC_BYTE_INC);
+ if (status) {
+ ath10k_err(ar, "%s: failed to write 0x%p to window data addr\n",
+ __func__, data);
+ return status;
+ }
+
+ /* set window register, which starts the write cycle */
+ return ath10k_set_addrwin_reg(ar, MBOX_WINDOW_WRITE_ADDR_ADDRESS,
+ address);
+}
+
+static int ath10k_sdio_bmi_credits(struct ath10k *ar)
+{
+ u32 addr, cmd_credits;
+ unsigned long timeout;
+ int ret;
+
+ cmd_credits = 0;
+
+ /* Read the counter register to get the command credits */
+ addr = MBOX_COUNT_DEC_ADDRESS + ATH10K_HIF_MBOX_NUM_MAX * 4;
+
+ timeout = jiffies + BMI_COMMUNICATION_TIMEOUT_HZ;
+ while (time_before(jiffies, timeout) && !cmd_credits) {
+ /* Hit the credit counter with a 4-byte access, the first byte
+ * read will hit the counter and cause a decrement, while the
+ * remaining 3 bytes has no effect. The rationale behind this
+ * is to make all HIF accesses 4-byte aligned.
+ */
+ ret = ath10k_sdio_read_write_sync(ar, addr,
+ (u8 *)&cmd_credits,
+ sizeof(cmd_credits),
+ HIF_RD_SYNC_BYTE_INC);
+ if (ret) {
+ ath10k_err(ar,
+ "Unable to decrement the command credit count register: %d\n",
+ ret);
+ return ret;
+ }
+
+ /* The counter is only 8 bits.
+ * Ignore anything in the upper 3 bytes
+ */
+ cmd_credits &= 0xFF;
+ }
+
+ if (!cmd_credits) {
+ ath10k_err(ar, "bmi communication timeout\n");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int ath10k_sdio_bmi_get_rx_lkahd(struct ath10k *ar)
+{
+ unsigned long timeout;
+ u32 rx_word = 0;
+ int ret = 0;
+
+ timeout = jiffies + BMI_COMMUNICATION_TIMEOUT_HZ;
+ while ((time_before(jiffies, timeout)) && !rx_word) {
+ ret = ath10k_sdio_read_write_sync(ar,
+ MBOX_HOST_INT_STATUS_ADDRESS,
+ (u8 *)&rx_word,
+ sizeof(rx_word),
+ HIF_RD_SYNC_BYTE_INC);
+ if (ret) {
+ ath10k_err(ar, "unable to read RX_LOOKAHEAD_VALID\n");
+ return ret;
+ }
+
+ /* all we really want is one bit */
+ rx_word &= 1;
+ }
+
+ if (!rx_word) {
+ ath10k_err(ar, "bmi_recv_buf FIFO empty\n");
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+int ath10k_sdio_hif_exchange_bmi_msg(struct ath10k *ar,
+ void *req, u32 req_len,
+ void *resp, u32 *resp_len)
+{
+ int ret = 0;
+ u32 addr;
+ struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar);
+
+ ret = ath10k_sdio_bmi_credits(ar);
+ if (ret)
+ return ret;
+
+ /* BMI data is written to the end of the mailbox address space */
+ addr = ar_sdio->mbox_info.htc_addr + ATH10K_HIF_MBOX_WIDTH - req_len;
+
+ ret = ath10k_sdio_read_write_sync(ar, addr, req, req_len,
+ HIF_WR_SYNC_BYTE_INC);
+ if (ret) {
+ ath10k_err(ar, "unable to send the bmi data to the device\n");
+ return ret;
+ }
+
+ if (!resp || !resp_len)
+ /* No response expected */
+ goto out;
+
+ /* During normal bootup, small reads may be required.
+ * Rather than issue an HIF Read and then wait as the Target
+ * adds successive bytes to the FIFO, we wait here until
+ * we know that response data is available.
+ *
+ * This allows us to cleanly timeout on an unexpected
+ * Target failure rather than risk problems at the HIF level.
+ * In particular, this avoids SDIO timeouts and possibly garbage
+ * data on some host controllers. And on an interconnect
+ * such as Compact Flash (as well as some SDIO masters) which
+ * does not provide any indication on data timeout, it avoids
+ * a potential hang or garbage response.
+ *
+ * Synchronization is more difficult for reads larger than the
+ * size of the MBOX FIFO (128B), because the Target is unable
+ * to push the 129th byte of data until AFTER the Host posts an
+ * HIF Read and removes some FIFO data. So for large reads the
+ * Host proceeds to post an HIF Read BEFORE all the data is
+ * actually available to read. Fortunately, large BMI reads do
+ * not occur in practice -- they're supported for debug/development.
+ *
+ * So Host/Target BMI synchronization is divided into these cases:
+ * CASE 1: length < 4
+ * Should not happen
+ *
+ * CASE 2: 4 <= length <= 128
+ * Wait for first 4 bytes to be in FIFO
+ * If CONSERVATIVE_BMI_READ is enabled, also wait for
+ * a BMI command credit, which indicates that the ENTIRE
+ * response is available in the the FIFO
+ *
+ * CASE 3: length > 128
+ * Wait for the first 4 bytes to be in FIFO
+ *
+ * For most uses, a small timeout should be sufficient and we will
+ * usually see a response quickly; but there may be some unusual
+ * (debug) cases of BMI_EXECUTE where we want an larger timeout.
+ * For now, we use an unbounded busy loop while waiting for
+ * BMI_EXECUTE.
+ *
+ * If BMI_EXECUTE ever needs to support longer-latency execution,
+ * especially in production, this code needs to be enhanced to sleep
+ * and yield. Also note that BMI_COMMUNICATION_TIMEOUT is currently
+ * a function of Host processor speed.
+ */
+ ret = ath10k_sdio_bmi_get_rx_lkahd(ar);
+ if (ret)
+ goto out;
+
+ /* We always read from the start of the mbox address */
+ addr = ar_sdio->mbox_info.htc_addr;
+ ret = ath10k_sdio_read_write_sync(ar, addr, resp, *resp_len,
+ HIF_RD_SYNC_BYTE_INC);
+ if (ret)
+ ath10k_err(ar, "Unable to read the bmi data from the device: %d\n",
+ ret);
+
+out:
+ return ret;
+}
+
+static void ath10k_sdio_hif_stop(struct ath10k *ar)
+{
+ struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar);
+ struct ath10k_sdio_bus_request *req, *tmp_req;
+
+ ath10k_sdio_irq_disable(ar);
+
+ cancel_work_sync(&ar_sdio->wr_async_work);
+
+ spin_lock_bh(&ar_sdio->wr_async_lock);
+
+ list_for_each_entry_safe(req, tmp_req, &ar_sdio->wr_asyncq, list) {
+ struct ath10k_htc_ep *ep;
+
+ list_del(&req->list);
+
+ ep = &ar->htc.endpoint[req->eid];
+ ath10k_htc_notify_tx_completion(ep, req->skb);
+ ath10k_sdio_free_bus_req(ar_sdio, req);
+ }
+
+ spin_unlock_bh(&ar_sdio->wr_async_lock);
+}
+
+#ifdef CONFIG_PM
+
+static int ath10k_sdio_hif_suspend(struct ath10k *ar)
+{
+ return -EOPNOTSUPP;
+}
+
+static int ath10k_sdio_hif_resume(struct ath10k *ar)
+{
+ struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar);
+
+ switch (ar->state) {
+ case ATH10K_STATE_OFF:
+ ath10k_dbg(ar, ATH10K_DBG_SDIO,
+ "sdio resume configuring sdio\n");
+
+ /* need to set sdio settings after power is cut from sdio */
+ ath10k_sdio_config(ar_sdio);
+ break;
+
+ case ATH10K_STATE_ON:
+ default:
+ break;
+ }
+
+ return 0;
+}
+#endif
+
+int ath10k_sdio_hif_map_service_to_pipe(struct ath10k *ar, u16 service_id,
+ u8 *ul_pipe, u8 *dl_pipe)
+{
+ int ret = 0, i;
+ bool ep_found = false;
+ enum ath10k_htc_ep_id eid;
+ struct ath10k_htc *htc = &ar->htc;
+ struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar);
+ u32 htt_addr, wmi_addr, htt_mbox_size, wmi_mbox_size;
+
+ /* For sdio, we are interested in the mapping between eid
+ * and pipeid rather than service_id to pipe_id.
+ * First we find out which eid has been allocated to the
+ * service...
+ */
+ for (i = 0; i < ATH10K_HTC_EP_COUNT; i++) {
+ if (htc->endpoint[i].service_id == service_id) {
+ eid = htc->endpoint[i].eid;
+ ep_found = true;
+ break;
+ }
+ }
+
+ if (!ep_found) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* Then we create the simplest mapping possible between pipeid
+ * and eid
+ */
+ *ul_pipe = *dl_pipe = (u8)eid;
+
+ /* Normally, HTT will use the upper part of the extended
+ * mailbox address space (ext_info[1].htc_ext_addr) and WMI ctrl
+ * the lower part (ext_info[0].htc_ext_addr).
+ * If fw wants swapping of mailbox addresses, the opposite is true.
+ */
+ if (ar_sdio->swap_mbox) {
+ htt_addr = ar_sdio->mbox_info.ext_info[0].htc_ext_addr;
+ wmi_addr = ar_sdio->mbox_info.ext_info[1].htc_ext_addr;
+ htt_mbox_size = ar_sdio->mbox_info.ext_info[0].htc_ext_sz;
+ wmi_mbox_size = ar_sdio->mbox_info.ext_info[1].htc_ext_sz;
+ } else {
+ htt_addr = ar_sdio->mbox_info.ext_info[1].htc_ext_addr;
+ wmi_addr = ar_sdio->mbox_info.ext_info[0].htc_ext_addr;
+ htt_mbox_size = ar_sdio->mbox_info.ext_info[1].htc_ext_sz;
+ wmi_mbox_size = ar_sdio->mbox_info.ext_info[0].htc_ext_sz;
+ }
+
+ switch (service_id) {
+ case ATH10K_HTC_SVC_ID_RSVD_CTRL:
+ /* HTC ctrl ep mbox address has already been setup in
+ * ath10k_sdio_hif_start
+ */
+ break;
+ case ATH10K_HTC_SVC_ID_WMI_CONTROL:
+ ar_sdio->mbox_addr[eid] = wmi_addr;
+ ar_sdio->mbox_size[eid] = wmi_mbox_size;
+ ath10k_dbg(ar, ATH10K_DBG_SDIO,
+ "WMI ctrl mbox addr = %x, mbox_size = %x\n",
+ ar_sdio->mbox_addr[eid], ar_sdio->mbox_size[eid]);
+ break;
+ case ATH10K_HTC_SVC_ID_HTT_DATA_MSG:
+ ar_sdio->mbox_addr[eid] = htt_addr;
+ ar_sdio->mbox_size[eid] = htt_mbox_size;
+ ath10k_dbg(ar, ATH10K_DBG_SDIO,
+ "HTT data mbox addr = %x, mbox_size = %x\n",
+ ar_sdio->mbox_addr[eid], ar_sdio->mbox_size[eid]);
+ break;
+ default:
+ ath10k_err(ar, "Unsupported service ID: %x\n",
+ service_id);
+ ret = -EINVAL;
+ }
+
+out:
+ return ret;
+}
+
+void ath10k_sdio_hif_get_default_pipe(struct ath10k *ar,
+ u8 *ul_pipe, u8 *dl_pipe)
+{
+ ath10k_dbg(ar, ATH10K_DBG_SDIO, "sdio hif get default pipe\n");
+
+ /* HTC ctrl ep (SVC id 1) always has eid (and pipe_id in our
+ * case) == 0
+ */
+ *ul_pipe = 0;
+ *dl_pipe = 0;
+}
+
+static int ath10k_sdio_hif_fetch_cal_eeprom(struct ath10k *ar, void **data,
+ size_t *data_len)
+{
+ return -EOPNOTSUPP;
+}
+
+static void ath10k_sdio_write32(struct ath10k *ar, u32 offset, u32 value)
+{
+}
+
+static u32 ath10k_sdio_read32(struct ath10k *ar, u32 offset)
+{
+ return 0;
+}
+
+static void ath10k_sdio_hif_send_complete_check(struct ath10k *ar,
+ u8 pipe, int force)
+{
+}
+
+static u16 ath10k_sdio_hif_get_free_queue_number(struct ath10k *ar, u8 pipe)
+{
+ return 0;
+}
+
+static const struct ath10k_hif_ops ath10k_sdio_hif_ops = {
+ .tx_sg = ath10k_sdio_hif_tx_sg,
+ .diag_read = ath10k_sdio_hif_diag_read,
+ .diag_write = ath10k_sdio_diag_write_mem,
+ .exchange_bmi_msg = ath10k_sdio_hif_exchange_bmi_msg,
+ .start = ath10k_sdio_hif_start,
+ .stop = ath10k_sdio_hif_stop,
+ .map_service_to_pipe = ath10k_sdio_hif_map_service_to_pipe,
+ .get_default_pipe = ath10k_sdio_hif_get_default_pipe,
+ .send_complete_check = ath10k_sdio_hif_send_complete_check,
+ .get_free_queue_number = ath10k_sdio_hif_get_free_queue_number,
+ .power_up = ath10k_sdio_hif_power_up,
+ .power_down = ath10k_sdio_hif_power_down,
+ .read32 = ath10k_sdio_read32,
+ .write32 = ath10k_sdio_write32,
+#ifdef CONFIG_PM
+ .suspend = ath10k_sdio_hif_suspend,
+ .resume = ath10k_sdio_hif_resume,
+#endif
+ .fetch_cal_eeprom = ath10k_sdio_hif_fetch_cal_eeprom,
+};
+
+#ifdef CONFIG_PM_SLEEP
+
+/* Empty handlers so that mmc subsystem doesn't remove us entirely during
+ * suspend. We instead follow cfg80211 suspend/resume handlers.
+ */
+static int ath10k_sdio_pm_suspend(struct device *device)
+{
+ return 0;
+}
+
+static int ath10k_sdio_pm_resume(struct device *device)
+{
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(ath10k_sdio_pm_ops, ath10k_sdio_pm_suspend,
+ ath10k_sdio_pm_resume);
+
+#define ATH10K_SDIO_PM_OPS (&ath10k_sdio_pm_ops)
+
+#else
+
+#define ATH10K_SDIO_PM_OPS NULL
+
+#endif /* CONFIG_PM_SLEEP */
+
+static int ath10k_sdio_probe(struct sdio_func *func,
+ const struct sdio_device_id *id)
+{
+ int ret;
+ struct ath10k_sdio *ar_sdio;
+ struct ath10k *ar;
+ int i;
+ enum ath10k_hw_rev hw_rev;
+
+ hw_rev = ATH10K_HW_QCA65XX;
+
+ ar = ath10k_core_create(sizeof(*ar_sdio), &func->dev, ATH10K_BUS_SDIO,
+ hw_rev, &ath10k_sdio_hif_ops);
+ if (!ar) {
+ dev_err(&func->dev, "failed to allocate core\n");
+ return -ENOMEM;
+ }
+
+ ath10k_dbg(ar, ATH10K_DBG_BOOT,
+ "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 = ath10k_sdio_priv(ar);
+
+ ar_sdio->dma_buffer = kzalloc(ATH10K_HIF_DMA_BUFFER_SIZE, GFP_KERNEL);
+ if (!ar_sdio->dma_buffer) {
+ ret = -ENOMEM;
+ goto err_core_destroy;
+ }
+
+ ar_sdio->func = func;
+ sdio_set_drvdata(func, ar_sdio);
+
+ ar_sdio->is_disabled = true;
+ ar_sdio->ar = ar;
+
+ spin_lock_init(&ar_sdio->lock);
+ spin_lock_init(&ar_sdio->wr_async_lock);
+ spin_lock_init(&ar_sdio->irq_data.lock);
+ mutex_init(&ar_sdio->dma_buffer_mutex);
+
+ INIT_LIST_HEAD(&ar_sdio->bus_req_freeq);
+ INIT_LIST_HEAD(&ar_sdio->wr_asyncq);
+
+ INIT_WORK(&ar_sdio->wr_async_work, ath10k_sdio_write_async_work);
+ ar_sdio->workqueue = create_singlethread_workqueue("ath10k_sdio_wq");
+ if (!ar_sdio->workqueue)
+ goto err;
+
+ init_waitqueue_head(&ar_sdio->irq_wq);
+
+ for (i = 0; i < ATH10K_SDIO_BUS_REQUEST_MAX_NUM; i++)
+ ath10k_sdio_free_bus_req(ar_sdio, &ar_sdio->bus_req[i]);
+
+ ar->dev_id = id->device;
+ ar->id.vendor = id->vendor;
+ ar->id.device = id->device;
+
+ ath10k_sdio_set_mbox_info(ar_sdio);
+
+ ret = ath10k_sdio_config(ar_sdio);
+ if (ret) {
+ ath10k_err(ar, "Failed to config sdio: %d\n", ret);
+ goto err;
+ }
+
+ ret = ath10k_core_register(ar, 0/*chip_id is not applicaple for SDIO*/);
+ if (ret) {
+ ath10k_err(ar, "failed to register driver core: %d\n", ret);
+ goto err;
+ }
+
+ return ret;
+
+err:
+ kfree(ar_sdio->dma_buffer);
+err_core_destroy:
+ ath10k_core_destroy(ar);
+
+ return ret;
+}
+
+static void ath10k_sdio_remove(struct sdio_func *func)
+{
+ struct ath10k_sdio *ar_sdio;
+ struct ath10k *ar;
+
+ ar_sdio = sdio_get_drvdata(func);
+ ar = ar_sdio->ar;
+
+ ath10k_dbg(ar, ATH10K_DBG_BOOT,
+ "sdio removed func %d vendor 0x%x device 0x%x\n",
+ func->num, func->vendor, func->device);
+
+ (void)ath10k_sdio_hif_disable_intrs(ar_sdio);
+ cancel_work_sync(&ar_sdio->wr_async_work);
+ ath10k_core_unregister(ar);
+ ath10k_core_destroy(ar);
+
+ kfree(ar_sdio->dma_buffer);
+}
+
+static const struct sdio_device_id ath10k_sdio_devices[] = {
+ {SDIO_DEVICE(ATH10K_MANUFACTURER_CODE,
+ (ATH10K_MANUFACTURER_ID_AR6005_BASE | 0xA))},
+ {},
+};
+
+MODULE_DEVICE_TABLE(sdio, ath10k_sdio_devices);
+
+static struct sdio_driver ath10k_sdio_driver = {
+ .name = "ath10k_sdio",
+ .id_table = ath10k_sdio_devices,
+ .probe = ath10k_sdio_probe,
+ .remove = ath10k_sdio_remove,
+ .drv.pm = ATH10K_SDIO_PM_OPS,
+};
+
+static int __init ath10k_sdio_init(void)
+{
+ int ret;
+
+ ret = sdio_register_driver(&ath10k_sdio_driver);
+ if (ret)
+ pr_err("sdio driver registration failed: %d\n", ret);
+
+ return ret;
+}
+
+static void __exit ath10k_sdio_exit(void)
+{
+ sdio_unregister_driver(&ath10k_sdio_driver);
+}
+
+module_init(ath10k_sdio_init);
+module_exit(ath10k_sdio_exit);
+
+MODULE_AUTHOR("Qualcomm Atheros");
+MODULE_DESCRIPTION("Driver support for Qualcomm Atheros 802.11ac WLAN SDIO devices");
+MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/net/wireless/ath/ath10k/sdio.h b/drivers/net/wireless/ath/ath10k/sdio.h
new file mode 100644
index 0000000..5c2b71c
--- /dev/null
+++ b/drivers/net/wireless/ath/ath10k/sdio.h
@@ -0,0 +1,276 @@
+/*
+ * Copyright (c) 2004-2011 Atheros Communications Inc.
+ * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
+ * Copyright (c) 2016 Kapsch Trafficcom AB
+ *
+ * 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.
+ */
+
+#ifndef _SDIO_H_
+#define _SDIO_H_
+
+#define ATH10K_HIF_MBOX_BLOCK_SIZE 256
+#define ATH10K_MANUFACTURER_ID_AR6005_BASE 0x500
+
+#define ATH10K_MANUFACTURER_ID_REV_MASK 0x00FF
+#define ATH10K_MANUFACTURER_CODE 0x271 /* Atheros */
+
+#define ATH10K_HIF_DMA_BUFFER_SIZE (32 * 1024)
+#define ATH10K_SDIO_MAX_BUFFER_SIZE 4096 /*Unsure of this constant*/
+
+/* Mailbox address in SDIO address space */
+#define ATH10K_HIF_MBOX_BASE_ADDR 0x1000
+#define ATH10K_HIF_MBOX_WIDTH 0x800
+
+#define ATH10K_HIF_MBOX_TOT_WIDTH \
+ (ATH10K_HIF_MBOX_NUM_MAX * ATH10K_HIF_MBOX_WIDTH)
+
+#define ATH10K_HIF_MBOX0_EXT_BASE_ADDR 0x5000
+#define ATH10K_HIF_MBOX0_EXT_WIDTH (36 * 1024)
+#define ATH10K_HIF_MBOX0_EXT_WIDTH_ROME_2_0 (56 * 1024)
+#define ATH10K_HIF_MBOX1_EXT_WIDTH (36 * 1024)
+#define ATH10K_HIF_MBOX_DUMMY_SPACE_SIZE (2 * 1024)
+
+#define ATH10K_HTC_MBOX_MAX_PAYLOAD_LENGTH \
+ (ATH10K_SDIO_MAX_BUFFER_SIZE - sizeof(struct ath10k_htc_hdr))
+
+#define ATH10K_HIF_MBOX_NUM_MAX 4
+#define ATH10K_SDIO_BUS_REQUEST_MAX_NUM 64
+
+#define ATH10K_SDIO_HIF_COMMUNICATION_TIMEOUT_HZ (100 * HZ)
+
+/* HTC runs over mailbox 0 */
+#define ATH10K_HTC_MAILBOX 0
+
+/* GMBOX addresses */
+#define ATH10K_HIF_GMBOX_BASE_ADDR 0x7000
+#define ATH10K_HIF_GMBOX_WIDTH 0x4000
+
+/* interrupt mode register */
+#define CCCR_SDIO_IRQ_MODE_REG 0xF0
+#define CCCR_SDIO_IRQ_MODE_REG_SDIO3 0x16
+
+#define CCCR_SDIO_DRIVER_STRENGTH_ENABLE_ADDR 0xF2
+
+#define CCCR_SDIO_DRIVER_STRENGTH_ENABLE_A 0x02
+#define CCCR_SDIO_DRIVER_STRENGTH_ENABLE_C 0x04
+#define CCCR_SDIO_DRIVER_STRENGTH_ENABLE_D 0x08
+
+#define CCCR_SDIO_ASYNC_INT_DELAY_ADDRESS 0xF0
+#define CCCR_SDIO_ASYNC_INT_DELAY_LSB 0x06
+#define CCCR_SDIO_ASYNC_INT_DELAY_MASK 0xC0
+
+/* mode to enable special 4-bit interrupt assertion without clock */
+#define SDIO_IRQ_MODE_ASYNC_4BIT_IRQ BIT(0)
+#define SDIO_IRQ_MODE_ASYNC_4BIT_IRQ_SDIO3 BIT(1)
+
+#define ATH10K_SDIO_TARGET_DEBUG_INTR_MASK 0x01
+
+/* The theoretical maximum number of RX messages that can be fetched
+ * from the mbox interrupt handler in one loop is derived in the following
+ * way:
+ *
+ * Let's assume that each packet in a bundle of the maximum bundle size
+ * (HTC_HOST_MAX_MSG_PER_BUNDLE) has the HTC header bundle count set
+ * to the maximum value (HTC_HOST_MAX_MSG_PER_BUNDLE).
+ *
+ * in this case the driver must allocate
+ * (HTC_HOST_MAX_MSG_PER_BUNDLE * HTC_HOST_MAX_MSG_PER_BUNDLE) skb's.
+ */
+#define ATH10K_SDIO_MAX_RX_MSGS \
+ (HTC_HOST_MAX_MSG_PER_BUNDLE * HTC_HOST_MAX_MSG_PER_BUNDLE)
+
+struct ath10k_sdio_bus_request {
+ struct list_head list;
+
+ /* sdio address */
+ u32 address;
+ u32 request;
+ size_t len;
+ struct sk_buff *skb;
+ enum ath10k_htc_ep_id eid;
+ int status;
+};
+
+struct ath10k_sdio_rx_data {
+ struct sk_buff *skb;
+ size_t alloc_len;
+ size_t act_len;
+ enum ath10k_htc_ep_id eid;
+ bool part_of_bundle;
+ bool last_in_bundle;
+ int status;
+};
+
+/* direction of transfer (read/write) */
+#define HIF_READ 0x00000001
+#define HIF_WRITE 0x00000002
+#define HIF_DIR_MASK (HIF_READ | HIF_WRITE)
+
+/* emode - This indicates the whether the command is to be executed in a
+ * blocking or non-blocking fashion (HIF_SYNCHRONOUS/
+ * HIF_ASYNCHRONOUS). The read/write data paths in HTC have been
+ * implemented using the asynchronous mode allowing the the bus
+ * driver to indicate the completion of operation through the
+ * registered callback routine. The requirement primarily comes
+ * from the contexts these operations get called from (a driver's
+ * transmit context or the ISR context in case of receive).
+ * Support for both of these modes is essential.
+ */
+#define HIF_SYNCHRONOUS 0x00000010
+#define HIF_ASYNCHRONOUS 0x00000020
+#define HIF_EMODE_MASK (HIF_SYNCHRONOUS | HIF_ASYNCHRONOUS)
+
+/* dmode - An interface may support different kinds of commands based on
+ * the tradeoff between the amount of data it can carry and the
+ * setup time. Byte and Block modes are supported (HIF_BYTE_BASIS/
+ * HIF_BLOCK_BASIS). In case of latter, the data is rounded off
+ * to the nearest block size by padding. The size of the block is
+ * configurable at compile time using the HIF_BLOCK_SIZE and is
+ * negotiated with the target during initialization after the
+ * ATH10K interrupts are enabled.
+ */
+#define HIF_BYTE_BASIS 0x00000040
+#define HIF_BLOCK_BASIS 0x00000080
+#define HIF_DMODE_MASK (HIF_BYTE_BASIS | HIF_BLOCK_BASIS)
+
+/* amode - This indicates if the address has to be incremented on ATH10K
+ * after every read/write operation (HIF?FIXED_ADDRESS/
+ * HIF_INCREMENTAL_ADDRESS).
+ */
+#define HIF_FIXED_ADDRESS 0x00000100
+#define HIF_INCREMENTAL_ADDRESS 0x00000200
+#define HIF_AMODE_MASK (HIF_FIXED_ADDRESS | HIF_INCREMENTAL_ADDRESS)
+
+#define HIF_WR_ASYNC_BYTE_INC \
+ (HIF_WRITE | HIF_ASYNCHRONOUS | \
+ HIF_BYTE_BASIS | HIF_INCREMENTAL_ADDRESS)
+
+#define HIF_WR_ASYNC_BLOCK_INC \
+ (HIF_WRITE | HIF_ASYNCHRONOUS | \
+ HIF_BLOCK_BASIS | HIF_INCREMENTAL_ADDRESS)
+
+#define HIF_WR_SYNC_BYTE_FIX \
+ (HIF_WRITE | HIF_SYNCHRONOUS | \
+ HIF_BYTE_BASIS | HIF_FIXED_ADDRESS)
+
+#define HIF_WR_SYNC_BYTE_INC \
+ (HIF_WRITE | HIF_SYNCHRONOUS | \
+ HIF_BYTE_BASIS | HIF_INCREMENTAL_ADDRESS)
+
+#define HIF_WR_SYNC_BLOCK_INC \
+ (HIF_WRITE | HIF_SYNCHRONOUS | \
+ HIF_BLOCK_BASIS | HIF_INCREMENTAL_ADDRESS)
+
+#define HIF_RD_SYNC_BYTE_INC \
+ (HIF_READ | HIF_SYNCHRONOUS | \
+ HIF_BYTE_BASIS | HIF_INCREMENTAL_ADDRESS)
+
+#define HIF_RD_SYNC_BYTE_FIX \
+ (HIF_READ | HIF_SYNCHRONOUS | \
+ HIF_BYTE_BASIS | HIF_FIXED_ADDRESS)
+
+#define HIF_RD_ASYNC_BLOCK_FIX \
+ (HIF_READ | HIF_ASYNCHRONOUS | \
+ HIF_BLOCK_BASIS | HIF_FIXED_ADDRESS)
+
+#define HIF_RD_SYNC_BLOCK_FIX \
+ (HIF_READ | HIF_SYNCHRONOUS | \
+ HIF_BLOCK_BASIS | HIF_FIXED_ADDRESS)
+
+struct ath10k_sdio_irq_proc_registers {
+ u8 host_int_status;
+ u8 cpu_int_status;
+ u8 error_int_status;
+ u8 counter_int_status;
+ u8 mbox_frame;
+ u8 rx_lkahd_valid;
+ u8 host_int_status2;
+ u8 gmbox_rx_avail;
+ __le32 rx_lkahd[2];
+ __le32 rx_gmbox_lkahd_alias[2];
+};
+
+struct ath10k_sdio_irq_enable_reg {
+ u8 int_status_en;
+ u8 cpu_int_status_en;
+ u8 err_int_status_en;
+ u8 cntr_int_status_en;
+};
+
+struct ath10k_sdio_irq_data {
+ /* protects irq_proc_reg and irq_en_reg below */
+ spinlock_t lock;
+ struct ath10k_sdio_irq_proc_registers irq_proc_reg;
+ struct ath10k_sdio_irq_enable_reg irq_en_reg;
+};
+
+struct ath10k_mbox_ext_info {
+ u32 htc_ext_addr;
+ u32 htc_ext_sz;
+};
+
+struct ath10k_mbox_info {
+ u32 htc_addr;
+ struct ath10k_mbox_ext_info ext_info[2];
+ u32 block_size;
+ u32 block_mask;
+ u32 gmbox_addr;
+ u32 gmbox_sz;
+};
+
+struct ath10k_sdio {
+ struct sdio_func *func;
+
+ struct ath10k_mbox_info mbox_info;
+ bool swap_mbox;
+ u32 mbox_addr[ATH10K_HTC_EP_COUNT];
+ u32 mbox_size[ATH10K_HTC_EP_COUNT];
+
+ /* available bus requests */
+ struct ath10k_sdio_bus_request bus_req[ATH10K_SDIO_BUS_REQUEST_MAX_NUM];
+ /* free list of bus requests */
+ struct list_head bus_req_freeq;
+ /* protects access to bus_req_freeq */
+ spinlock_t lock;
+
+ struct ath10k_sdio_rx_data rx_pkts[ATH10K_SDIO_MAX_RX_MSGS];
+ size_t n_rx_pkts;
+
+ struct ath10k *ar;
+ struct ath10k_sdio_irq_data irq_data;
+
+ u8 *dma_buffer;
+
+ /* protects access to dma_buffer */
+ struct mutex dma_buffer_mutex;
+
+ atomic_t irq_handling;
+ atomic_t stopping;
+ wait_queue_head_t irq_wq;
+
+ bool is_disabled;
+
+ struct workqueue_struct *workqueue;
+ struct work_struct wr_async_work;
+ struct list_head wr_asyncq;
+ /* protects access to wr_asyncq */
+ spinlock_t wr_async_lock;
+};
+
+static inline struct ath10k_sdio *ath10k_sdio_priv(struct ath10k *ar)
+{
+ return (struct ath10k_sdio *)ar->drv_priv;
+}
+
+#endif
--
1.7.9.5