From: Jahnavi Meher <[email protected]>
This file adds the rsi_sdio module, enabling the SDIO interface for
the 91x chipsets.
Signed-off-by: Jahnavi Meher <[email protected]>
---
rsi_sdio.c | 941 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 941 insertions(+)
diff -uprN a/drivers/net/wireless/rsi/common/rsi_sdio.c b/drivers/net/wireless/rsi/common/rsi_sdio.c
--- a/drivers/net/wireless/rsi/common/rsi_sdio.c 1970-01-01 05:30:00.000000000 +0530
+++ b/drivers/net/wireless/rsi/common/rsi_sdio.c 2014-01-30 16:24:33.180361123 +0530
@@ -0,0 +1,941 @@
+/**
+ * @file rsi_sdio.c
+ * @author
+ * @version 1.0
+ *
+ * @section LICENSE
+ * Copyright (c) 2013 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.
+ *
+ * @section DESCRIPTION
+ *
+ * The file contains Generic HAL layer for SDIO.
+ */
+
+#include "../include/rsi_main.h"
+#include "../include/rsi_hw_intf.h"
+#include "../include/rsi_device_ops.h"
+
+/**
+ * This function prepares cmd 52 read/write arg
+ *
+ * @param rw Read/write
+ * @param func function number
+ * @param raw indicates whether to perform read after write
+ * @param address address to which to read/write
+ * @param writedata data to write
+ * @return argument
+ */
+static unsigned long rsi_sdio_set_cmd52_arg(bool rw,
+ unsigned char func,
+ unsigned char raw,
+ unsigned int address,
+ unsigned char writedata)
+{
+ return ((rw & 1) << 31) | ((func & 0x7) << 28) |
+ ((raw & 1) << 27) | (1 << 26) |
+ ((address & 0x1FFFF) << 9) | (1 << 8) |
+ (writedata & 0xFF);
+}
+
+/**
+ * This function issues cmd52 byte write onto the card.
+ *
+ * @param card Pointer to the mmc_card.
+ * @param address Address to write.
+ * @param byte Data to write.
+ * @return Write status.
+ */
+static int rsi_cmd52writebyte(struct mmc_card *card,
+ unsigned int address,
+ unsigned char byte)
+{
+ struct mmc_command io_cmd;
+ unsigned long arg;
+
+ memset(&io_cmd, 0, sizeof(io_cmd));
+ arg = rsi_sdio_set_cmd52_arg(1, 0, 0, address, byte);
+ io_cmd.opcode = SD_IO_RW_DIRECT;
+ io_cmd.arg = arg;
+ io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
+
+ return mmc_wait_for_cmd(card->host, &io_cmd, 0);
+}
+
+/**
+ * This function issues cmd52 byte read onto the card.
+ *
+ * @param card Pointer to the mmc_card.
+ * @param address Address to read from.
+ * @param byte Variable to store read value.
+ * @return Read status.
+ */
+static int rsi_cmd52readbyte(struct mmc_card *card,
+ unsigned int address,
+ unsigned char *byte)
+{
+ struct mmc_command io_cmd;
+ unsigned long arg;
+ int err;
+
+ memset(&io_cmd, 0, sizeof(io_cmd));
+ arg = rsi_sdio_set_cmd52_arg(0, 0, 0, address, 0);
+ io_cmd.opcode = SD_IO_RW_DIRECT;
+ io_cmd.arg = arg;
+ io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
+
+ err = mmc_wait_for_cmd(card->host, &io_cmd, 0);
+ if ((!err) && (byte))
+ *byte = io_cmd.resp[0] & 0xFF;
+ return err;
+}
+
+/**
+ * This function issues sdio commands.
+ *
+ * @param func Pointer to the sdio_func structure.
+ * @param opcode Opcode value.
+ * @param arg Arguments to pass.
+ * @param flags Flags which are set.
+ * @param resp Pointer to store response.
+ * @return err: command status as 0 or -1.
+ */
+static int rsi_issue_sdiocommand(struct sdio_func *func,
+ unsigned int opcode,
+ unsigned int arg,
+ unsigned int flags,
+ unsigned int *resp)
+{
+ struct mmc_command cmd;
+ int err;
+ struct mmc_host *host;
+
+ host = func->card->host;
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+ cmd.opcode = opcode;
+ cmd.arg = arg;
+ cmd.flags = flags;
+ err = mmc_wait_for_cmd(host, &cmd, 3);
+
+ if ((!err) && (resp))
+ *resp = cmd.resp[0];
+
+ return err;
+}
+
+/**
+ * This function is called upon the occurence of an interrupt.
+ *
+ * @param function Pointer to the sdio_func structure.
+ * @return None.
+ */
+static void rsi_handle_interrupt(struct sdio_func *function)
+{
+ struct rsi_hw *adapter = sdio_get_drvdata(function);
+
+ sdio_release_host(function);
+ rsi_interrupt_handler(adapter->priv);
+ sdio_claim_host(function);
+
+ return;
+}
+
+/**
+ * This function resets and re-initializes the card.
+ *
+ * @param pfunction Pointer to the sdio_func structure.
+ * @return None.
+ */
+static void rsi_reset_card(struct sdio_func *pfunction)
+{
+ int ret = 0;
+ int err;
+ struct mmc_card *card = pfunction->card;
+ struct mmc_host *host = card->host;
+ unsigned char cmd52_resp;
+ unsigned int clock;
+ unsigned int resp, i;
+ unsigned short rca;
+ int bit = (fls(host->ocr_avail) - 1);
+
+ /* Reset 9110 chip */
+ ret = rsi_cmd52writebyte(pfunction->card,
+ SDIO_CCCR_ABORT,
+ (1 << 3));
+
+ /* Card will not send any response as it is getting reset immediately
+ * Hence expect a timeout status from host controller
+ */
+ if (ret != -ETIMEDOUT)
+ rsi_dbg(ERR_ZONE, "%s: Reset failed : %d\n", __func__, ret);
+
+ /* Wait for few milli seconds to get rid of residue charges if any */
+ msleep(20);
+
+ /* Initialize the SDIO card */
+ host->ios.vdd = bit;
+ host->ios.chip_select = MMC_CS_DONTCARE;
+ host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+ host->ios.power_mode = MMC_POWER_UP;
+ host->ios.bus_width = MMC_BUS_WIDTH_1;
+ host->ios.timing = MMC_TIMING_LEGACY;
+ host->ops->set_ios(host, &host->ios);
+
+ /**
+ * This delay should be sufficient to allow the power supply
+ * to reach the minimum voltage.
+ */
+ msleep(20);
+
+ host->ios.clock = host->f_min;
+ host->ios.power_mode = MMC_POWER_ON;
+ host->ops->set_ios(host, &host->ios);
+
+ /**
+ * This delay must be at least 74 clock sizes, or 1 ms, or the
+ * time required to reach a stable voltage.
+ */
+ msleep(20);
+
+ /* Issue CMD0. Goto idle state */
+ host->ios.chip_select = MMC_CS_HIGH;
+ host->ops->set_ios(host, &host->ios);
+ msleep(20);
+ err = rsi_issue_sdiocommand(pfunction,
+ MMC_GO_IDLE_STATE,
+ 0,
+ (MMC_RSP_NONE | MMC_CMD_BC),
+ NULL);
+ host->ios.chip_select = MMC_CS_DONTCARE;
+ host->ops->set_ios(host, &host->ios);
+ msleep(20);
+ host->use_spi_crc = 0;
+
+ if (err)
+ rsi_dbg(ERR_ZONE, "%s: CMD0 failed : %d\n", __func__, err);
+
+ if (!host->ocr_avail) {
+ /* Issue CMD5, arg = 0 */
+ err = rsi_issue_sdiocommand(pfunction,
+ SD_IO_SEND_OP_COND,
+ 0,
+ (MMC_RSP_R4 | MMC_CMD_BCR),
+ &resp);
+ if (err) {
+ rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n",
+ __func__, err);
+ }
+ host->ocr_avail = resp;
+ }
+
+ /* Issue CMD5, arg = ocr. Wait till card is ready */
+ for (i = 0; i < 100; i++) {
+ err = rsi_issue_sdiocommand(pfunction,
+ SD_IO_SEND_OP_COND,
+ host->ocr_avail,
+ (MMC_RSP_R4 | MMC_CMD_BCR),
+ &resp);
+ if (err) {
+ rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n",
+ __func__, err);
+ break;
+ }
+
+ if (resp & MMC_CARD_BUSY)
+ break;
+ msleep(20);
+ }
+
+ if ((i == 100) || (err)) {
+ rsi_dbg(ERR_ZONE, "%s: card in not ready : %d %d\n",
+ __func__, i, err);
+ return;
+ }
+
+ /* Issue CMD3, get RCA */
+ err = rsi_issue_sdiocommand(pfunction,
+ SD_SEND_RELATIVE_ADDR,
+ 0,
+ (MMC_RSP_R6 | MMC_CMD_BCR),
+ &resp);
+ if (err) {
+ rsi_dbg(ERR_ZONE, "%s: CMD3 failed : %d\n", __func__, err);
+ return;
+ }
+ rca = resp >> 16;
+ host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
+ host->ops->set_ios(host, &host->ios);
+
+ /* Issue CMD7, select card */
+ err = rsi_issue_sdiocommand(pfunction,
+ MMC_SELECT_CARD,
+ (rca << 16),
+ (MMC_RSP_R1 | MMC_CMD_AC),
+ NULL);
+ if (err) {
+ rsi_dbg(ERR_ZONE, "%s: CMD7 failed : %d\n", __func__, err);
+ return;
+ }
+
+ /* Enable high speed */
+ if (card->host->caps & MMC_CAP_SD_HIGHSPEED) {
+ rsi_dbg(ERR_ZONE, "%s: Set high speed mode\n", __func__);
+ err = rsi_cmd52readbyte(card, SDIO_CCCR_SPEED, &cmd52_resp);
+ if (err) {
+ rsi_dbg(ERR_ZONE, "%s: CCCR speed reg read failed: %d\n",
+ __func__, err);
+ card->state &= ~MMC_STATE_HIGHSPEED;
+ } else {
+ err = rsi_cmd52writebyte(card,
+ SDIO_CCCR_SPEED,
+ (cmd52_resp | SDIO_SPEED_EHS));
+ if (err) {
+ rsi_dbg(ERR_ZONE,
+ "%s: CCR speed regwrite failed %d\n",
+ __func__, err);
+ return;
+ }
+ mmc_card_set_highspeed(card);
+ host->ios.timing = MMC_TIMING_SD_HS;
+ host->ops->set_ios(host, &host->ios);
+ }
+ }
+
+ /* Set clock */
+ if (mmc_card_highspeed(card))
+ clock = 50000000;
+ else
+ clock = card->cis.max_dtr;
+
+ if (clock > host->f_max)
+ clock = host->f_max;
+
+ host->ios.clock = clock;
+ host->ops->set_ios(host, &host->ios);
+
+ if (card->host->caps & MMC_CAP_4_BIT_DATA) {
+ /* CMD52: Set bus width & disable card detect resistor */
+ err = rsi_cmd52writebyte(card,
+ SDIO_CCCR_IF,
+ (SDIO_BUS_CD_DISABLE |
+ SDIO_BUS_WIDTH_4BIT));
+ if (err) {
+ rsi_dbg(ERR_ZONE, "%s: Set bus mode failed : %d\n",
+ __func__, err);
+ return;
+ }
+ host->ios.bus_width = MMC_BUS_WIDTH_4;
+ host->ops->set_ios(host, &host->ios);
+ }
+ return;
+}
+
+/**
+ * This function sets the clock frequency
+ *
+ * @param adapter Pointer to the adapter structure.
+ * @param freq Clock frequency.
+ * @return 0 on success.
+ */
+static int rsi_setclock(struct rsi_hw *adapter, unsigned int freq)
+{
+ unsigned int clock;
+ struct mmc_host *host = adapter->pfunction->card->host;
+
+ clock = freq * 1000;
+ if (clock > host->f_max)
+ clock = host->f_max;
+ host->ios.clock = clock;
+ host->ops->set_ios(host, &host->ios);
+ return 0;
+}
+
+/**
+ * This function sets the host block length.
+ *
+ * @param adapter Pointer to the adapter structure.
+ * @param length Block length to be set.
+ * @return status: 0 on success, -1 on failure.
+ */
+static int rsi_setblocklength(struct rsi_hw *adapter, unsigned int length)
+{
+ int status;
+ rsi_dbg(INIT_ZONE, "%s: Setting the block length\n", __func__);
+
+ status = sdio_set_block_size(adapter->pfunction, length);
+ adapter->pfunction->max_blksize = 256;
+
+ rsi_dbg(INFO_ZONE,
+ "%s: Operational blk length is %d\n", __func__, length);
+ return status;
+}
+
+/**
+ * This function queries and sets the card's features.
+ *
+ * @param adapter Pointer to the adapter structure.
+ * @return status: 0 on success, -1 on failure.
+ */
+static int rsi_setupcard(struct rsi_hw *adapter)
+{
+ int status = 0;
+
+ if (rsi_setclock(adapter, 50000)) {
+ rsi_dbg(INFO_ZONE,
+ "%s: Unsuccessful at setting clk\n", __func__);
+ return -1;
+ }
+
+ adapter->tx_blk_size = 256;
+ adapter->rx_blk_size = 256;
+ status = rsi_setblocklength(adapter, adapter->tx_blk_size);
+ if (status) {
+ rsi_dbg(ERR_ZONE,
+ "%s: Unable to set block length\n", __func__);
+ }
+ return status;
+}
+
+/**
+ * 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.
+ */
+static int rsi_init_sdio_slave_regs(struct rsi_hw *adapter)
+{
+ unsigned char function = 0;
+ unsigned char byte;
+ int status = 0;
+
+ if (adapter->next_read_delay) {
+ byte = adapter->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 (adapter->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;
+}
+
+static int rsi_init_sdio_interface(struct rsi_hw *adapter,
+ struct sdio_func *pfunction)
+{
+ int status = 0;
+ sdio_claim_host(pfunction);
+
+ pfunction->enable_timeout = 100;
+ status = sdio_enable_func(pfunction);
+ if (status) {
+ rsi_dbg(ERR_ZONE, "%s: Failed to enable interface\n", __func__);
+ sdio_release_host(pfunction);
+ return status;
+ }
+
+ rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__);
+
+ adapter->pfunction = pfunction;
+ adapter->device = &pfunction->dev;
+
+ sdio_set_drvdata(pfunction, adapter);
+
+ status = rsi_setupcard(adapter);
+ if (status) {
+ rsi_dbg(ERR_ZONE, "%s: Failed to setup card\n", __func__);
+ goto fail;
+ }
+
+ rsi_dbg(INIT_ZONE, "%s: Setup card succesfully\n", __func__);
+
+ status = rsi_init_sdio_slave_regs(adapter);
+ if (status) {
+ rsi_dbg(ERR_ZONE, "%s: Failed to init slave regs\n", __func__);
+ goto fail;
+ }
+ sdio_release_host(pfunction);
+ return status;
+fail:
+ sdio_disable_func(pfunction);
+ sdio_release_host(pfunction);
+ return status;
+}
+
+/**
+ * This function registers the client driver's interrupt handler
+ * with the bus driver.
+ *
+ * @param pfunction Pointer to the sdio_func structure.
+ * @param interrupt_handler Pointer to the interrupt handler.
+ * @param pContext Pointer to context of interrupt.
+ * @return None.
+ */
+static int rsi_request_interrupt_handler(struct sdio_func *pfunction,
+ SD_INTERRUPT interrupt_handler)
+{
+ int status;
+
+ status = sdio_claim_irq(pfunction,
+ (sdio_irq_handler_t *)interrupt_handler);
+ if (status) {
+ rsi_dbg(ERR_ZONE, "%s: Failed to request IRQ %d\n", __func__,
+ status);
+ }
+ return status;
+}
+
+/**
+ * This function acks the interrupt received.
+ *
+ * @param adapter Pointer to the adapter structure.
+ * @param int_bit Interrupt bit to write into register.
+ * @return Void.
+ */
+void rsi_ack_interrupt(struct rsi_hw *adapter, unsigned char int_bit)
+{
+ int status;
+ status = rsi_write_register(adapter,
+ 1,
+ (SDIO_FUN1_INTR_CLR_REG |
+ SD_REQUEST_MASTER),
+ &int_bit);
+ if (status)
+ rsi_dbg(ERR_ZONE, "%s: unable to send ack\n", __func__);
+ return;
+}
+
+/**
+ * This function reads one byte of information from a register.
+ *
+ * @param adapter Pointer to the adapter structure.
+ * @param addr Address of the register.
+ * @param data Pointer to the data that stores the data read.
+ * @return 0 on success, -1 on failure.
+ */
+int rsi_read_register(struct rsi_hw *adapter,
+ unsigned int addr,
+ unsigned char *data)
+{
+ unsigned char fun_num = 0;
+ int status;
+
+ sdio_claim_host(adapter->pfunction);
+
+ if (fun_num == 0)
+ *data = sdio_f0_readb(adapter->pfunction, addr, &status);
+ else
+ *data = sdio_readb(adapter->pfunction, addr, &status);
+
+ sdio_release_host(adapter->pfunction);
+
+ if (status)
+ return -1;
+ else
+ return 0;
+}
+
+/**
+ * This function writes one byte of information into a register.
+ *
+ * @param adapter Pointer to the adapter structure.
+ * @param function Function Number.
+ * @param addr Address of the register.
+ * @param data Pointer to the data tha has to be written.
+ * @return 0 on success, -1 on failure.
+ */
+int rsi_write_register(struct rsi_hw *adapter,
+ unsigned char function,
+ unsigned int addr,
+ unsigned char *data)
+{
+ int status = 0;
+
+ sdio_claim_host(adapter->pfunction);
+
+ if (function == 0)
+ sdio_f0_writeb(adapter->pfunction, *data, addr, &status);
+ else
+ sdio_writeb(adapter->pfunction, *data, addr, &status);
+
+ sdio_release_host(adapter->pfunction);
+
+ if (status)
+ return -1;
+ else
+ return 0;
+}
+
+/**
+ * This function read multiple bytes of information from the SD card.
+ *
+ * @param adapter Pointer to the adapter structure.
+ * @param addr Address of the register.
+ * @param count Number of multiple bytes to be read.
+ * @param data Pointer to the read data.
+ * @return 0 on success, -1 on failure.
+ */
+int rsi_read_register_multiple(struct rsi_hw *adapter,
+ unsigned int addr,
+ unsigned int count,
+ unsigned char *data)
+{
+ unsigned int status;
+
+ sdio_claim_host(adapter->pfunction);
+
+ status = sdio_readsb(adapter->pfunction, data, addr, count);
+
+ sdio_release_host(adapter->pfunction);
+
+ if (status != 0)
+ rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 read failed\n", __func__);
+ return status;
+}
+
+/**
+ * This function writes multiple bytes of information to the SD card.
+ *
+ * @param adapter Pointer to the adapter structure.
+ * @param addr Address of the register.
+ * @param Pointer to the data that has to be written.
+ * @param count Number of multiple bytes to be written.
+ * @return 0 on success, -1 on failure.
+ */
+int rsi_write_register_multiple(struct rsi_hw *adapter,
+ unsigned int addr,
+ unsigned char *data,
+ unsigned int count)
+{
+ int status = 0;
+
+ if (adapter->stop_card_write == 2) {
+ rsi_dbg(ERR_ZONE, "%s: Stopping card writes\n", __func__);
+ return 0;
+ } else if (adapter->stop_card_write == 1) {
+ rsi_dbg(ERR_ZONE, "%s: Continue card writes\n", __func__);
+ adapter->stop_card_write++;
+ }
+
+ sdio_claim_host(adapter->pfunction);
+
+ status = sdio_writesb(adapter->pfunction, addr, data, count);
+
+ sdio_release_host(adapter->pfunction);
+
+ if (status) {
+ rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 write failed %d\n",
+ __func__, status);
+ adapter->stop_card_write = 2;
+ rsi_print(ERR_ZONE, adapter->prev_desc, FRAME_DESC_SZ);
+ } else {
+ memcpy(adapter->prev_desc, data, FRAME_DESC_SZ);
+ }
+ return status;
+}
+
+/**
+ * This function writes the packet to the device.
+ *
+ * @param adapter Pointer to the adapter structure.
+ * @param pkt Pointer to the data to be written on to the device.
+ * @param len length of the data to be written on to the device.
+ * @return 0 on success, -1 on failure.
+ */
+int rsi_host_intf_write_pkt(struct rsi_hw *adapter,
+ unsigned char *pkt,
+ unsigned int len)
+{
+ unsigned int block_size = adapter->tx_blk_size;
+ unsigned int num_blocks, address, length;
+ unsigned int queueno;
+ int status = 0;
+
+ queueno = ((pkt[1] >> 4) & 0xf);
+
+ if ((!len) && (queueno == RSI_WIFI_DATA_Q)) {
+ rsi_dbg(ERR_ZONE, "%s: Wrong length\n", __func__);
+ return -1;
+ }
+
+ num_blocks = len / block_size;
+
+ if (len % block_size)
+ num_blocks++;
+
+ if ((cpu_to_le16(*(unsigned short *)pkt) < 14) &&
+ (queueno == RSI_WIFI_DATA_Q)) {
+ rsi_dbg(ERR_ZONE, "%s:Small pkt sending@@@\n", __func__);
+ return -1;
+ }
+
+ address = (num_blocks * block_size | (queueno << 12));
+ length = num_blocks * block_size;
+
+ status = rsi_write_register_multiple(adapter,
+ address,
+ (unsigned char *)pkt,
+ length);
+ if (status) {
+ rsi_dbg(ERR_ZONE, "%s: Unable to write onto the card: %d\n",
+ __func__, status);
+ }
+ rsi_dbg(DATA_TX_ZONE, "%s: Successfully written onto card\n", __func__);
+ return status;
+}
+
+/**
+ * This function reads the packet from the SD card.
+ *
+ * @param adapter Pointer to the adapter data structure.
+ * @param pkt Pointer to the packet data to be read from the the device.
+ * @param length Length of the data to be read from the device.
+ * @return 0 on success, -1 on failure.
+ */
+int rsi_host_intf_read_pkt(struct rsi_hw *adapter,
+ unsigned char *pkt,
+ unsigned int length)
+{
+ int status = 0;
+
+ if (!length) {
+ rsi_dbg(ERR_ZONE, "%s: Pkt size is zero\n", __func__);
+ return status;
+ }
+
+ status = rsi_read_register_multiple(adapter,
+ length,
+ length, /*num of bytes*/
+ (unsigned char *)pkt);
+
+ if (status) {
+ rsi_dbg(ERR_ZONE, "%s: Failed to read frame: %d\n", __func__,
+ status);
+ }
+ return status;
+}
+
+/**
+ * This function is called by kernel when the driver provided
+ * Vendor and device IDs are matched. All the initialization
+ * work is done here.
+ *
+ * @param pfunction Pointer to the sdio_func structure.
+ * @param id Pointer to sdio_device_id structure.
+ * @return 0 on success, 1 on failure.
+ */
+static int rsi_probe(struct sdio_func *pfunction,
+ const struct sdio_device_id *id)
+{
+ struct rsi_hw *adapter;
+
+ rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__);
+
+ adapter = rsi_init_os_intf_ops();
+ if (!adapter) {
+ rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n",
+ __func__);
+ return 1;
+ }
+
+ if (rsi_init_sdio_interface(adapter, pfunction)) {
+ rsi_dbg(ERR_ZONE, "%s: Failed to init sdio interface\n",
+ __func__);
+ goto fail;
+ }
+
+ if (rsi_device_init(adapter->priv, 0)) {
+ rsi_dbg(ERR_ZONE, "%s: Failed in device init\n", __func__);
+ sdio_claim_host(pfunction);
+ sdio_disable_func(pfunction);
+ sdio_release_host(pfunction);
+ goto fail;
+ }
+
+ sdio_claim_host(pfunction);
+ if (rsi_request_interrupt_handler(pfunction,
+ (SD_INTERRUPT)rsi_handle_interrupt)) {
+ sdio_release_host(pfunction);
+ goto fail;
+ }
+
+ sdio_release_host(pfunction);
+ rsi_dbg(INIT_ZONE, "%s: Registered Interrupt handler\n", __func__);
+
+ return 0;
+fail:
+ rsi_deinit_os_intf_ops(adapter);
+ rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__);
+ return 1;
+}
+
+/**
+ * This function performs the reverse of the probe function.
+ *
+ * @param pfunction Pointer to the sdio_func structure.
+ * @return void.
+ */
+static void rsi_disconnect(struct sdio_func *pfunction)
+{
+ struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
+
+ if (!adapter)
+ return;
+
+ adapter->stop_card_write = 2;
+ rsi_device_deinit(adapter);
+
+ sdio_claim_host(pfunction);
+ sdio_release_irq(pfunction);
+ sdio_disable_func(pfunction);
+ rsi_deinit_os_intf_ops(adapter);
+ rsi_reset_card(pfunction);
+ sdio_release_host(pfunction);
+
+ return;
+}
+
+#ifdef CONFIG_PM
+static int rsi_suspend(struct device *dev)
+{
+ /* Not yet implemented */
+ return -ENOSYS;
+}
+
+static int rsi_resume(struct device *dev)
+{
+ /* Not yet implemented */
+ return -ENOSYS;
+}
+
+static const struct dev_pm_ops rsi_pm_ops = {
+ .suspend = rsi_suspend,
+ .resume = rsi_resume,
+};
+#endif
+
+static const struct sdio_device_id rsi_dev_table[] = {
+ { SDIO_DEVICE(0x303, 0x100) },
+ { SDIO_DEVICE(0x041B, 0x0301) },
+ { SDIO_DEVICE(0x041B, 0x0201) },
+ { SDIO_DEVICE(0x041B, 0x9330) },
+ { /* Blank */},
+};
+
+static struct sdio_driver rsi_driver = {
+ .name = "RSI-SDIO WLAN",
+ .probe = rsi_probe,
+ .remove = rsi_disconnect,
+ .id_table = rsi_dev_table,
+#ifdef CONFIG_PM
+ .drv = {
+ .pm = &rsi_pm_ops,
+ }
+#endif
+};
+
+/**
+ * This function registers the sdio module.
+ *
+ * @param Void.
+ * @return 0 on success.
+ */
+static int rsi_module_init(void)
+{
+ sdio_register_driver(&rsi_driver);
+ rsi_dbg(INIT_ZONE, "%s: Registering driver\n", __func__);
+ return 0;
+}
+
+/**
+ * This function unregisters the sdio module.
+ *
+ * @param Void.
+ * @return None.
+ */
+static void rsi_module_exit(void)
+{
+ sdio_unregister_driver(&rsi_driver);
+ rsi_dbg(INFO_ZONE, "%s: Unregistering driver\n", __func__);
+ return;
+}
+
+module_init(rsi_module_init);
+module_exit(rsi_module_exit);
+
+MODULE_AUTHOR("Redpine Signals Inc");
+MODULE_DESCRIPTION("Common layer for RSI drivers");
+MODULE_SUPPORTED_DEVICE("RSI-91x");
+MODULE_VERSION("0.1");
+MODULE_LICENSE("GPL");