From: Fariya Fatima
This patch adds the functions required by the rsi_sdio module.
Signed-off-by: Fariya Fatima <fariya.f@xxxxxxxxxxxxxxxxxx>
---
rsi_91x_sdio_ops.c | 563 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 563 insertions(+)
diff -rupN linux-3.14-rc5/drivers/net/wireless/rsi/rsi_91x_sdio_ops.c linux-3.14-rc5_new/drivers/net/wireless/rsi/rsi_91x_sdio_ops.c
--- linux-3.14-rc5/drivers/net/wireless/rsi/rsi_91x_sdio_ops.c 1970-01-01 05:30:00.000000000 +0530
+++ linux-3.14-rc5_new/drivers/net/wireless/rsi/rsi_91x_sdio_ops.c 2014-03-04 07:38:11.672600052 +0545
@@ -0,0 +1,563 @@
+/**
+ * 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 "rsi_sdio.h"
+#include "rsi_common.h"
+
+/**
+ * This function sets the AHB master access MS word in the SDIO slave registers.
+ *
+ * @param adapter Pointer to the adapter structure.
+ * @param ms_word ms word need to be initialized.
+ * @return status: 0 on success, -1 on failure.
+ */
+static 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_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_write_register(adapter,
+ function,
+ SDIO_MASTER_ACCESS_LSBYTE,
+ &byte);
+ return status;
+}
+
+/**
+ * This function includes the actual funtionality of copying the TA firmware to the card.
+ * Basically this function includes opening the TA file,reading the TA file and
+ * writing their values in blocks of data.
+ *
+ * @param common Pointer to the driver private structure.
+ * @param fw Pointer to the firmware value to be written.
+ * @param len length of firmware file.
+ * @param num_blocks Number of blocks to be written to the card.
+ * @return 0 on success and -1 on failure.
+ */
+static int rsi_copy_to_card(struct rsi_common *common,
+ const u8 *fw,
+ u32 len,
+ u32 num_blocks)
+{
+ struct rsi_hw *adapter = common->priv;
+ struct rsi_91x_sdiodev *dev =
+ (struct rsi_91x_sdiodev *)adapter->rsi_dev;
+ u32 indx, ii;
+ u32 block_size = dev->tx_blk_size;
+ u32 lsb_address;
+ __le32 data[] = { TA_HOLD_THREAD_VALUE, TA_SOFT_RST_CLR,
+ TA_PC_ZERO, TA_RELEASE_THREAD_VALUE };
+ u32 address[] = { TA_HOLD_THREAD_REG, TA_SOFT_RESET_REG,
+ TA_TH0_PC_REG, TA_RELEASE_THREAD_REG };
+ u32 base_address;
+ u16 msb_address;
+
+ base_address = TA_LOAD_ADDRESS;
+ msb_address = base_address >> 16;
+
+ for (indx = 0, ii = 0; ii < num_blocks; ii++, indx += block_size) {
+ lsb_address = ((u16) base_address | RSI_SD_REQUEST_MASTER);
+ if (rsi_write_register_multiple(adapter,
+ lsb_address,
+ (u8 *)(fw + indx),
+ block_size)) {
+ rsi_dbg(ERR_ZONE,
+ "%s: Unable to load %s blk\n", __func__,
+ FIRMWARE_RSI9113);
+ return -1;
+ }
+ rsi_dbg(INIT_ZONE, "%s: loading block: %d\n", __func__, ii);
+ base_address += block_size;
+ if ((base_address >> 16) != msb_address) {
+ msb_address += 1;
+ if (rsi_sdio_master_access_msword(adapter,
+ msb_address)) {
+ rsi_dbg(ERR_ZONE,
+ "%s: Unable to set ms word reg\n",
+ __func__);
+ return -1;
+ }
+ }
+ }
+
+ if (len % block_size) {
+ lsb_address = ((u16) base_address | RSI_SD_REQUEST_MASTER);
+ if (rsi_write_register_multiple(adapter,
+ lsb_address,
+ (u8 *)(fw + indx),
+ len % block_size)) {
+ rsi_dbg(ERR_ZONE,
+ "%s: Unable to load f/w\n", __func__);
+ return -1;
+ }
+ }
+ rsi_dbg(INIT_ZONE,
+ "%s: Succesfully loaded TA instructions\n", __func__);
+
+ if (rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR)) {
+ rsi_dbg(ERR_ZONE,
+ "%s: Unable to set ms word to common reg\n",
+ __func__);
+ return -1;
+ }
+
+ for (ii = 0; ii < ARRAY_SIZE(data); ii++) {
+ /* Bringing TA out of reset */
+ if (rsi_write_register_multiple(adapter,
+ (address[ii] |
+ RSI_SD_REQUEST_MASTER),
+ (u8 *)&data[ii],
+ 4)) {
+ rsi_dbg(ERR_ZONE,
+ "%s: Unable to hold TA threads\n", __func__);
+ return -1;
+ }
+ }
+
+ rsi_dbg(INIT_ZONE, "%s: loaded firmware\n", __func__);
+ return 0;
+}
+
+/**
+ * This function includes the actual funtionality of loading the TA firmware.
+ * This function also includes opening the TA file,reading the TA file and
+ * writing their values in blocks of data.
+ *
+ * @param common Pointer to the driver private structure.
+ * @param fw_status Firmware status.
+ * @return status: 0 on success, -1 on failure.
+ */
+static int rsi_load_ta_instructions(struct rsi_common *common)
+{
+ struct rsi_hw *adapter = common->priv;
+ struct rsi_91x_sdiodev *dev =
+ (struct rsi_91x_sdiodev *)adapter->rsi_dev;
+ u32 len;
+ u32 num_blocks;
+ const u8 *fw;
+ const struct firmware *fw_entry = NULL;
+ u32 block_size = dev->tx_blk_size;
+ int status = 0;
+ u32 base_address;
+ u16 msb_address;
+
+ if (rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR)) {
+ rsi_dbg(ERR_ZONE,
+ "%s: Unable to set ms word to common reg\n",
+ __func__);
+ return -1;
+ }
+ base_address = TA_LOAD_ADDRESS;
+ msb_address = (base_address >> 16);
+
+ if (rsi_sdio_master_access_msword(adapter, msb_address)) {
+ rsi_dbg(ERR_ZONE,
+ "%s: Unable to set ms word reg\n", __func__);
+ return -1;
+ }
+
+ status = request_firmware(&fw_entry, FIRMWARE_RSI9113, adapter->device);
+ if (status < 0) {
+ rsi_dbg(ERR_ZONE, "%s Firmware file %s not found\n",
+ __func__, FIRMWARE_RSI9113);
+ return status;
+ }
+
+ fw = kmemdup(fw_entry->data, fw_entry->size, GFP_KERNEL);
+ len = fw_entry->size;
+
+ if (len % 4)
+ len += (4 - (len % 4));
+
+ num_blocks = (len / block_size);
+
+ rsi_dbg(INIT_ZONE, "%s: Instruction size:%d\n", __func__, len);
+ rsi_dbg(INIT_ZONE, "%s: num blocks: %d\n", __func__, num_blocks);
+
+ status = rsi_copy_to_card(common, fw, len, num_blocks);
+ release_firmware(fw_entry);
+ return status;
+}
+
+/**
+ * This Function reads rx_blocks register and figures out the size of the rx
+ * pkt
+
+ * @param 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;
+ u8 num_blks = 0;
+ u32 rcv_pkt_len = 0;
+ int status = 0;
+
+ status = rsi_read_register(adapter,
+ SDIO_RX_NUM_BLOCKS_REG,
+ &num_blks);
+
+ if (status) {
+ rsi_dbg(ERR_ZONE,
+ "%s: Failed to read pkt length from the card:\n",
+ __func__);
+ return status;
+ }
+ rcv_pkt_len = (num_blks * 256);
+
+ common->rx_data_pkt = kmalloc(rcv_pkt_len, GFP_KERNEL);
+ if (!common->rx_data_pkt) {
+ rsi_dbg(ERR_ZONE, "%s: Failed in memory allocation\n",
+ __func__);
+ return -1;
+ }
+
+ status = rsi_host_intf_read_pkt(adapter,
+ common->rx_data_pkt,
+ rcv_pkt_len);
+ if (status) {
+ rsi_dbg(ERR_ZONE, "%s: Failed to read packet from card\n",
+ __func__);
+ goto fail;
+ }
+
+ status = rsi_read_pkt(common, rcv_pkt_len);
+ kfree(common->rx_data_pkt);
+ return status;
+
+fail:
+ kfree(common->rx_data_pkt);
+ return -1;
+}
+
+/**
+ * This function does the actual initialization of SDBUS slave registers.
+ *
+ * @param 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_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_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: Initialzing SDIO read start level\n", __func__);
+ byte = 0x24;
+
+ status = rsi_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: Initialzing FIFO ctrl registers\n", __func__);
+ byte = (128 - 32);
+
+ status = rsi_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_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;
+}
+
+/**
+ * This function read and process the SDIO interrupts.
+ *
+ * @param common Pointer to the driver private structure.
+ * @return None.
+ */
+void rsi_interrupt_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;
+ enum SDIO_INTERRUPT_TYPE isr_type;
+ u8 isr_status = 0;
+ u8 fw_status = 0;
+
+ dev->rx_info.sdio_int_counter++;
+
+ do {
+ mutex_lock(&common->tx_rxlock);
+ status = rsi_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->tx_rxlock);
+ return;
+ }
+
+ if (isr_status == 0) {
+ rsi_set_event(&common->tx_thread.event);
+ dev->rx_info.sdio_intr_status_zero++;
+ mutex_unlock(&common->tx_rxlock);
+ return;
+ }
+
+ rsi_dbg(ISR_ZONE, "%s: Intr_status = %x %d %d\n",
+ __func__, isr_status, (1 << MSDU_PKT_PENDING),
+ (1 << FW_ASSERT_IND));
+
+ do {
+ RSI_GET_SDIO_INTERRUPT_TYPE(isr_status, isr_type);
+
+ switch (isr_type) {
+ case BUFFER_AVAILABLE:
+ dev->rx_info.watch_bufferfull_count = 0;
+ dev->rx_info.buffer_full = false;
+ dev->rx_info.mgmt_buffer_full = false;
+ rsi_ack_interrupt(common->priv,
+ (1 << PKT_BUFF_AVAILABLE));
+ rsi_set_event((&common->tx_thread.event));
+ rsi_dbg(ISR_ZONE,
+ "%s: ==> BUFFER_AVILABLE <==\n",
+ __func__);
+ dev->rx_info.buf_avilable_counter++;
+ break;
+
+ case FIRMWARE_ASSERT_IND:
+ rsi_dbg(ERR_ZONE,
+ "%s: ==> FIRMWARE Assert <==\n",
+ __func__);
+ status = rsi_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_ack_interrupt(common->priv,
+ (1 << FW_ASSERT_IND));
+ }
+
+ common->fsm_state = FSM_CARD_NOT_READY;
+ break;
+
+ case MSDU_PACKET_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->tx_rxlock);
+ return;
+ }
+ break;
+ default:
+ rsi_ack_interrupt(common->priv,
+ isr_status);
+ dev->rx_info.total_sdio_unknown_intr++;
+ isr_status = 0;
+ rsi_dbg(ISR_ZONE,
+ "Unknown Interrupt %x\n",
+ isr_status);
+ break;
+ }
+ isr_status ^= BIT(isr_type - 1);
+ } while (isr_status);
+ mutex_unlock(&common->tx_rxlock);
+ } while (1);
+ return;
+}
+
+/**
+ * This Function Initializes The HAL.
+ *
+ * @param common Pointer to the driver private structure.
+ * @param fw_status Firmware status.
+ * @return 0 on success, -1 on failure.
+ */
+int rsi_device_init(struct rsi_common *common)
+{
+ if (rsi_load_ta_instructions(common))
+ return -1;
+
+ if (rsi_sdio_master_access_msword(common->priv, MISC_CFG_BASE_ADDR)) {
+ rsi_dbg(ERR_ZONE, "%s: Unable to set ms word reg\n",
+ __func__);
+ return -1;
+ }
+ rsi_dbg(INIT_ZONE,
+ "%s: Setting ms word to 0x41050000\n", __func__);
+
+ return 0;
+}
+
+/**
+ * This function is used to the read buffer status register and set
+ * relevant fields in rsi_91x_sdiodev struct.
+ *
+ * @param adapter Pointer to the driver hw structure.
+ * @param q_num The Q number whose status is to be found.
+ * @return status: -1 on failure or else queue full/stop is indicated.
+ */
+int rsi_read_buffer_status_register(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;
+
+ status = rsi_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 ((q_num == MGMT_SOFT_Q) && (dev->rx_info.mgmt_buffer_full))
+ return QUEUE_FULL;
+
+ if (dev->rx_info.buffer_full)
+ return QUEUE_FULL;
+
+ return QUEUE_NOT_FULL;
+}
+
+/**
+ * This Function determines the event timeout duration
+ *
+ * @param common Pointer to the driver private structure.
+ * @return timeout duration is returned.
+ */
+int rsi_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;
+}
--
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