421 lines
10 KiB
C
421 lines
10 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2014 Redpine Signals 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/firmware.h>
|
||
|
|
#include <net/rsi_91x.h>
|
||
|
|
#include "rsi_sdio.h"
|
||
|
|
#include "rsi_common.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* rsi_sdio_master_access_msword() - This function sets the AHB master access
|
||
|
|
* MS word in the SDIO slave registers.
|
||
|
|
* @adapter: Pointer to the adapter structure.
|
||
|
|
* @ms_word: ms word need to be initialized.
|
||
|
|
*
|
||
|
|
* Return: status: 0 on success, -1 on failure.
|
||
|
|
*/
|
||
|
|
int rsi_sdio_master_access_msword(struct rsi_hw *adapter, u16 ms_word)
|
||
|
|
{
|
||
|
|
u8 byte;
|
||
|
|
u8 function = 0;
|
||
|
|
int status = 0;
|
||
|
|
|
||
|
|
byte = (u8)(ms_word & 0x00FF);
|
||
|
|
|
||
|
|
rsi_dbg(INIT_ZONE,
|
||
|
|
"%s: MASTER_ACCESS_MSBYTE:0x%x\n", __func__, byte);
|
||
|
|
|
||
|
|
status = rsi_sdio_write_register(adapter,
|
||
|
|
function,
|
||
|
|
SDIO_MASTER_ACCESS_MSBYTE,
|
||
|
|
&byte);
|
||
|
|
if (status) {
|
||
|
|
rsi_dbg(ERR_ZONE,
|
||
|
|
"%s: fail to access MASTER_ACCESS_MSBYTE\n",
|
||
|
|
__func__);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
byte = (u8)(ms_word >> 8);
|
||
|
|
|
||
|
|
rsi_dbg(INIT_ZONE, "%s:MASTER_ACCESS_LSBYTE:0x%x\n", __func__, byte);
|
||
|
|
status = rsi_sdio_write_register(adapter,
|
||
|
|
function,
|
||
|
|
SDIO_MASTER_ACCESS_LSBYTE,
|
||
|
|
&byte);
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void rsi_rx_handler(struct rsi_hw *adapter);
|
||
|
|
|
||
|
|
void rsi_sdio_rx_thread(struct rsi_common *common)
|
||
|
|
{
|
||
|
|
struct rsi_hw *adapter = common->priv;
|
||
|
|
struct rsi_91x_sdiodev *sdev = adapter->rsi_dev;
|
||
|
|
|
||
|
|
do {
|
||
|
|
rsi_wait_event(&sdev->rx_thread.event, EVENT_WAIT_FOREVER);
|
||
|
|
rsi_reset_event(&sdev->rx_thread.event);
|
||
|
|
rsi_rx_handler(adapter);
|
||
|
|
} while (!atomic_read(&sdev->rx_thread.thread_done));
|
||
|
|
|
||
|
|
rsi_dbg(INFO_ZONE, "%s: Terminated SDIO RX thread\n", __func__);
|
||
|
|
atomic_inc(&sdev->rx_thread.thread_done);
|
||
|
|
kthread_complete_and_exit(&sdev->rx_thread.completion, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* rsi_process_pkt() - This Function reads rx_blocks register and figures out
|
||
|
|
* the size of the rx pkt.
|
||
|
|
* @common: Pointer to the driver private structure.
|
||
|
|
*
|
||
|
|
* Return: 0 on success, -1 on failure.
|
||
|
|
*/
|
||
|
|
static int rsi_process_pkt(struct rsi_common *common)
|
||
|
|
{
|
||
|
|
struct rsi_hw *adapter = common->priv;
|
||
|
|
struct rsi_91x_sdiodev *dev =
|
||
|
|
(struct rsi_91x_sdiodev *)adapter->rsi_dev;
|
||
|
|
u8 num_blks = 0;
|
||
|
|
u32 rcv_pkt_len = 0;
|
||
|
|
int status = 0;
|
||
|
|
u8 value = 0;
|
||
|
|
|
||
|
|
num_blks = ((adapter->interrupt_status & 1) |
|
||
|
|
((adapter->interrupt_status >> RECV_NUM_BLOCKS) << 1));
|
||
|
|
|
||
|
|
if (!num_blks) {
|
||
|
|
status = rsi_sdio_read_register(adapter,
|
||
|
|
SDIO_RX_NUM_BLOCKS_REG,
|
||
|
|
&value);
|
||
|
|
if (status) {
|
||
|
|
rsi_dbg(ERR_ZONE,
|
||
|
|
"%s: Failed to read pkt length from the card:\n",
|
||
|
|
__func__);
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
num_blks = value & 0x1f;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (dev->write_fail == 2)
|
||
|
|
rsi_sdio_ack_intr(common->priv, (1 << MSDU_PKT_PENDING));
|
||
|
|
|
||
|
|
if (unlikely(!num_blks)) {
|
||
|
|
dev->write_fail = 2;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
rcv_pkt_len = (num_blks * 256);
|
||
|
|
|
||
|
|
status = rsi_sdio_host_intf_read_pkt(adapter, dev->pktbuffer,
|
||
|
|
rcv_pkt_len);
|
||
|
|
if (status) {
|
||
|
|
rsi_dbg(ERR_ZONE, "%s: Failed to read packet from card\n",
|
||
|
|
__func__);
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
status = rsi_read_pkt(common, dev->pktbuffer, rcv_pkt_len);
|
||
|
|
if (status) {
|
||
|
|
rsi_dbg(ERR_ZONE, "Failed to read the packet\n");
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* rsi_init_sdio_slave_regs() - This function does the actual initialization
|
||
|
|
* of SDBUS slave registers.
|
||
|
|
* @adapter: Pointer to the adapter structure.
|
||
|
|
*
|
||
|
|
* Return: status: 0 on success, -1 on failure.
|
||
|
|
*/
|
||
|
|
int rsi_init_sdio_slave_regs(struct rsi_hw *adapter)
|
||
|
|
{
|
||
|
|
struct rsi_91x_sdiodev *dev =
|
||
|
|
(struct rsi_91x_sdiodev *)adapter->rsi_dev;
|
||
|
|
u8 function = 0;
|
||
|
|
u8 byte;
|
||
|
|
int status = 0;
|
||
|
|
|
||
|
|
if (dev->next_read_delay) {
|
||
|
|
byte = dev->next_read_delay;
|
||
|
|
status = rsi_sdio_write_register(adapter,
|
||
|
|
function,
|
||
|
|
SDIO_NXT_RD_DELAY2,
|
||
|
|
&byte);
|
||
|
|
if (status) {
|
||
|
|
rsi_dbg(ERR_ZONE,
|
||
|
|
"%s: Failed to write SDIO_NXT_RD_DELAY2\n",
|
||
|
|
__func__);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (dev->sdio_high_speed_enable) {
|
||
|
|
rsi_dbg(INIT_ZONE, "%s: Enabling SDIO High speed\n", __func__);
|
||
|
|
byte = 0x3;
|
||
|
|
|
||
|
|
status = rsi_sdio_write_register(adapter,
|
||
|
|
function,
|
||
|
|
SDIO_REG_HIGH_SPEED,
|
||
|
|
&byte);
|
||
|
|
if (status) {
|
||
|
|
rsi_dbg(ERR_ZONE,
|
||
|
|
"%s: Failed to enable SDIO high speed\n",
|
||
|
|
__func__);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This tells SDIO FIFO when to start read to host */
|
||
|
|
rsi_dbg(INIT_ZONE, "%s: Initializing SDIO read start level\n", __func__);
|
||
|
|
byte = 0x24;
|
||
|
|
|
||
|
|
status = rsi_sdio_write_register(adapter,
|
||
|
|
function,
|
||
|
|
SDIO_READ_START_LVL,
|
||
|
|
&byte);
|
||
|
|
if (status) {
|
||
|
|
rsi_dbg(ERR_ZONE,
|
||
|
|
"%s: Failed to write SDIO_READ_START_LVL\n", __func__);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
rsi_dbg(INIT_ZONE, "%s: Initializing FIFO ctrl registers\n", __func__);
|
||
|
|
byte = (128 - 32);
|
||
|
|
|
||
|
|
status = rsi_sdio_write_register(adapter,
|
||
|
|
function,
|
||
|
|
SDIO_READ_FIFO_CTL,
|
||
|
|
&byte);
|
||
|
|
if (status) {
|
||
|
|
rsi_dbg(ERR_ZONE,
|
||
|
|
"%s: Failed to write SDIO_READ_FIFO_CTL\n", __func__);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
byte = 32;
|
||
|
|
status = rsi_sdio_write_register(adapter,
|
||
|
|
function,
|
||
|
|
SDIO_WRITE_FIFO_CTL,
|
||
|
|
&byte);
|
||
|
|
if (status) {
|
||
|
|
rsi_dbg(ERR_ZONE,
|
||
|
|
"%s: Failed to write SDIO_WRITE_FIFO_CTL\n", __func__);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* rsi_rx_handler() - Read and process SDIO interrupts.
|
||
|
|
* @adapter: Pointer to the adapter structure.
|
||
|
|
*
|
||
|
|
* Return: None.
|
||
|
|
*/
|
||
|
|
static void rsi_rx_handler(struct rsi_hw *adapter)
|
||
|
|
{
|
||
|
|
struct rsi_common *common = adapter->priv;
|
||
|
|
struct rsi_91x_sdiodev *dev =
|
||
|
|
(struct rsi_91x_sdiodev *)adapter->rsi_dev;
|
||
|
|
int status;
|
||
|
|
u8 isr_status = 0;
|
||
|
|
u8 fw_status = 0;
|
||
|
|
|
||
|
|
dev->rx_info.sdio_int_counter++;
|
||
|
|
|
||
|
|
do {
|
||
|
|
mutex_lock(&common->rx_lock);
|
||
|
|
status = rsi_sdio_read_register(common->priv,
|
||
|
|
RSI_FN1_INT_REGISTER,
|
||
|
|
&isr_status);
|
||
|
|
if (status) {
|
||
|
|
rsi_dbg(ERR_ZONE,
|
||
|
|
"%s: Failed to Read Intr Status Register\n",
|
||
|
|
__func__);
|
||
|
|
mutex_unlock(&common->rx_lock);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
adapter->interrupt_status = isr_status;
|
||
|
|
|
||
|
|
if (isr_status == 0) {
|
||
|
|
rsi_set_event(&common->tx_thread.event);
|
||
|
|
dev->rx_info.sdio_intr_status_zero++;
|
||
|
|
mutex_unlock(&common->rx_lock);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
rsi_dbg(ISR_ZONE, "%s: Intr_status = %x %d %d\n",
|
||
|
|
__func__, isr_status, (1 << MSDU_PKT_PENDING),
|
||
|
|
(1 << FW_ASSERT_IND));
|
||
|
|
|
||
|
|
if (isr_status & BIT(PKT_BUFF_AVAILABLE)) {
|
||
|
|
status = rsi_sdio_check_buffer_status(adapter, 0);
|
||
|
|
if (status < 0)
|
||
|
|
rsi_dbg(ERR_ZONE,
|
||
|
|
"%s: Failed to check buffer status\n",
|
||
|
|
__func__);
|
||
|
|
rsi_sdio_ack_intr(common->priv,
|
||
|
|
BIT(PKT_BUFF_AVAILABLE));
|
||
|
|
rsi_set_event(&common->tx_thread.event);
|
||
|
|
|
||
|
|
rsi_dbg(ISR_ZONE, "%s: ==> BUFFER_AVAILABLE <==\n",
|
||
|
|
__func__);
|
||
|
|
dev->buff_status_updated = true;
|
||
|
|
|
||
|
|
isr_status &= ~BIT(PKT_BUFF_AVAILABLE);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isr_status & BIT(FW_ASSERT_IND)) {
|
||
|
|
rsi_dbg(ERR_ZONE, "%s: ==> FIRMWARE Assert <==\n",
|
||
|
|
__func__);
|
||
|
|
status = rsi_sdio_read_register(common->priv,
|
||
|
|
SDIO_FW_STATUS_REG,
|
||
|
|
&fw_status);
|
||
|
|
if (status) {
|
||
|
|
rsi_dbg(ERR_ZONE,
|
||
|
|
"%s: Failed to read f/w reg\n",
|
||
|
|
__func__);
|
||
|
|
} else {
|
||
|
|
rsi_dbg(ERR_ZONE,
|
||
|
|
"%s: Firmware Status is 0x%x\n",
|
||
|
|
__func__, fw_status);
|
||
|
|
rsi_sdio_ack_intr(common->priv,
|
||
|
|
BIT(FW_ASSERT_IND));
|
||
|
|
}
|
||
|
|
|
||
|
|
common->fsm_state = FSM_CARD_NOT_READY;
|
||
|
|
|
||
|
|
isr_status &= ~BIT(FW_ASSERT_IND);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isr_status & BIT(MSDU_PKT_PENDING)) {
|
||
|
|
rsi_dbg(ISR_ZONE, "Pkt pending interrupt\n");
|
||
|
|
dev->rx_info.total_sdio_msdu_pending_intr++;
|
||
|
|
|
||
|
|
status = rsi_process_pkt(common);
|
||
|
|
if (status) {
|
||
|
|
rsi_dbg(ERR_ZONE, "%s: Failed to read pkt\n",
|
||
|
|
__func__);
|
||
|
|
mutex_unlock(&common->rx_lock);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
isr_status &= ~BIT(MSDU_PKT_PENDING);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isr_status) {
|
||
|
|
rsi_sdio_ack_intr(common->priv, isr_status);
|
||
|
|
dev->rx_info.total_sdio_unknown_intr++;
|
||
|
|
isr_status = 0;
|
||
|
|
rsi_dbg(ISR_ZONE, "Unknown Interrupt %x\n",
|
||
|
|
isr_status);
|
||
|
|
}
|
||
|
|
|
||
|
|
mutex_unlock(&common->rx_lock);
|
||
|
|
} while (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This function is used to read buffer status register and
|
||
|
|
* set relevant fields in rsi_91x_sdiodev struct.
|
||
|
|
*/
|
||
|
|
int rsi_sdio_check_buffer_status(struct rsi_hw *adapter, u8 q_num)
|
||
|
|
{
|
||
|
|
struct rsi_common *common = adapter->priv;
|
||
|
|
struct rsi_91x_sdiodev *dev =
|
||
|
|
(struct rsi_91x_sdiodev *)adapter->rsi_dev;
|
||
|
|
u8 buf_status = 0;
|
||
|
|
int status = 0;
|
||
|
|
static int counter = 4;
|
||
|
|
|
||
|
|
if (!dev->buff_status_updated && counter) {
|
||
|
|
counter--;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev->buff_status_updated = false;
|
||
|
|
status = rsi_sdio_read_register(common->priv,
|
||
|
|
RSI_DEVICE_BUFFER_STATUS_REGISTER,
|
||
|
|
&buf_status);
|
||
|
|
|
||
|
|
if (status) {
|
||
|
|
rsi_dbg(ERR_ZONE,
|
||
|
|
"%s: Failed to read status register\n", __func__);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (buf_status & (BIT(PKT_MGMT_BUFF_FULL))) {
|
||
|
|
if (!dev->rx_info.mgmt_buffer_full)
|
||
|
|
dev->rx_info.mgmt_buf_full_counter++;
|
||
|
|
dev->rx_info.mgmt_buffer_full = true;
|
||
|
|
} else {
|
||
|
|
dev->rx_info.mgmt_buffer_full = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (buf_status & (BIT(PKT_BUFF_FULL))) {
|
||
|
|
if (!dev->rx_info.buffer_full)
|
||
|
|
dev->rx_info.buf_full_counter++;
|
||
|
|
dev->rx_info.buffer_full = true;
|
||
|
|
} else {
|
||
|
|
dev->rx_info.buffer_full = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (buf_status & (BIT(PKT_BUFF_SEMI_FULL))) {
|
||
|
|
if (!dev->rx_info.semi_buffer_full)
|
||
|
|
dev->rx_info.buf_semi_full_counter++;
|
||
|
|
dev->rx_info.semi_buffer_full = true;
|
||
|
|
} else {
|
||
|
|
dev->rx_info.semi_buffer_full = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (dev->rx_info.mgmt_buffer_full || dev->rx_info.buf_full_counter)
|
||
|
|
counter = 1;
|
||
|
|
else
|
||
|
|
counter = 4;
|
||
|
|
|
||
|
|
out:
|
||
|
|
if ((q_num == MGMT_SOFT_Q) && (dev->rx_info.mgmt_buffer_full))
|
||
|
|
return QUEUE_FULL;
|
||
|
|
|
||
|
|
if ((q_num < MGMT_SOFT_Q) && (dev->rx_info.buffer_full))
|
||
|
|
return QUEUE_FULL;
|
||
|
|
|
||
|
|
return QUEUE_NOT_FULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* rsi_sdio_determine_event_timeout() - This Function determines the event
|
||
|
|
* timeout duration.
|
||
|
|
* @adapter: Pointer to the adapter structure.
|
||
|
|
*
|
||
|
|
* Return: timeout duration is returned.
|
||
|
|
*/
|
||
|
|
int rsi_sdio_determine_event_timeout(struct rsi_hw *adapter)
|
||
|
|
{
|
||
|
|
struct rsi_91x_sdiodev *dev =
|
||
|
|
(struct rsi_91x_sdiodev *)adapter->rsi_dev;
|
||
|
|
|
||
|
|
/* Once buffer full is seen, event timeout to occur every 2 msecs */
|
||
|
|
if (dev->rx_info.buffer_full)
|
||
|
|
return 2;
|
||
|
|
|
||
|
|
return EVENT_WAIT_FOREVER;
|
||
|
|
}
|