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    Subject[PATCH v7 3/7] drivers:media:radio: wl128x: fmdrv_common sources
    Date
    From: Manjunatha Halli <manjunatha_halli@ti.com>

    These are the sources for the common interfaces required by the
    FM V4L2 driver for TI WL127x and WL128x chips.

    These implement the FM channel-8 protocol communication with the
    chip. This makes use of the Shared Transport as its transport.

    Signed-off-by: Manjunatha Halli <manjunatha_halli@ti.com>
    ---
    drivers/media/radio/wl128x/fmdrv_common.c | 1970 +++++++++++++++++++++++++++++
    drivers/media/radio/wl128x/fmdrv_common.h | 402 ++++++
    2 files changed, 2372 insertions(+), 0 deletions(-)
    create mode 100644 drivers/media/radio/wl128x/fmdrv_common.c
    create mode 100644 drivers/media/radio/wl128x/fmdrv_common.h

    diff --git a/drivers/media/radio/wl128x/fmdrv_common.c b/drivers/media/radio/wl128x/fmdrv_common.c
    new file mode 100644
    index 0000000..874dbd8
    --- /dev/null
    +++ b/drivers/media/radio/wl128x/fmdrv_common.c
    @@ -0,0 +1,1970 @@
    +/*
    + * FM Driver for Connectivity chip of Texas Instruments.
    + *
    + * This sub-module of FM driver is common for FM RX and TX
    + * functionality. This module is responsible for:
    + * 1) Forming group of Channel-8 commands to perform particular
    + * functionality (eg., frequency set require more than
    + * one Channel-8 command to be sent to the chip).
    + * 2) Sending each Channel-8 command to the chip and reading
    + * response back over Shared Transport.
    + * 3) Managing TX and RX Queues and Tasklets.
    + * 4) Handling FM Interrupt packet and taking appropriate action.
    + * 5) Loading FM firmware to the chip (common, FM TX, and FM RX
    + * firmware files based on mode selection)
    + *
    + * Copyright (C) 2010 Texas Instruments
    + * Author: Raja Mani <raja_mani@ti.com>
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License version 2 as
    + * published by the Free Software Foundation.
    + *
    + * This program is distributed in the hope that it will be useful,
    + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    + * GNU General Public License for more details.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program; if not, write to the Free Software
    + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    + *
    + */
    +
    +#include <linux/module.h>
    +#include <linux/firmware.h>
    +#include <linux/delay.h>
    +#include "fmdrv.h"
    +#include "fmdrv_v4l2.h"
    +#include "fmdrv_common.h"
    +#include <linux/ti_wilink_st.h>
    +#include "fmdrv_rx.h"
    +#include "fmdrv_tx.h"
    +
    +/* Region info */
    +static struct region_info region_configs[] = {
    + /* Europe/US */
    + {
    + .channel_spacing = FM_CHANNEL_SPACING_200KHZ * FM_FREQ_MUL,
    + .bottom_frequency = 87500, /* 87.5 MHz */
    + .top_frequency = 108000, /* 108 MHz */
    + .region_index = 0,
    + },
    + /* Japan */
    + {
    + .channel_spacing = FM_CHANNEL_SPACING_200KHZ * FM_FREQ_MUL,
    + .bottom_frequency = 76000, /* 76 MHz */
    + .top_frequency = 90000, /* 90 MHz */
    + .region_index = 1,
    + },
    +};
    +
    +/* Band selection */
    +static unsigned char default_radio_region; /* Europe/US */
    +module_param(default_radio_region, byte, 0);
    +MODULE_PARM_DESC(default_radio_region, "Region: 0=Europe/US, 1=Japan");
    +
    +/* RDS buffer blocks */
    +static unsigned int default_rds_buf = 300;
    +module_param(default_rds_buf, uint, 0444);
    +MODULE_PARM_DESC(rds_buf, "RDS buffer entries");
    +
    +/* Radio Nr */
    +static int radio_nr = -1;
    +module_param(radio_nr, int, 0444);
    +MODULE_PARM_DESC(radio_nr, "Radio Nr");
    +
    +/* FM irq handlers forward declaration */
    +static void fm_irq_send_flag_getcmd(void *);
    +static void fm_irq_handle_flag_getcmd_resp(void *);
    +static void fm_irq_handle_hw_malfunction(void *);
    +static void fm_irq_handle_rds_start(void *);
    +static void fm_irq_send_rdsdata_getcmd(void *);
    +static void fm_irq_handle_rdsdata_getcmd_resp(void *);
    +static void fm_irq_handle_rds_finish(void *);
    +static void fm_irq_handle_tune_op_ended(void *);
    +static void fm_irq_handle_power_enb(void *);
    +static void fm_irq_handle_low_rssi_start(void *);
    +static void fm_irq_afjump_set_pi(void *);
    +static void fm_irq_handle_set_pi_resp(void *);
    +static void fm_irq_afjump_set_pimask(void *);
    +static void fm_irq_handle_set_pimask_resp(void *);
    +static void fm_irq_afjump_setfreq(void *);
    +static void fm_irq_handle_setfreq_resp(void *);
    +static void fm_irq_afjump_enableint(void *);
    +static void fm_irq_afjump_enableint_resp(void *);
    +static void fm_irq_start_afjump(void *);
    +static void fm_irq_handle_start_afjump_resp(void *);
    +static void fm_irq_afjump_rd_freq(void *);
    +static void fm_irq_afjump_rd_freq_resp(void *);
    +static void fm_irq_handle_low_rssi_finish(void *);
    +static void fm_irq_send_intmsk_cmd(void *);
    +static void fm_irq_handle_intmsk_cmd_resp(void *);
    +
    +/*
    + * When FM common module receives interrupt packet, following handlers
    + * will be executed one after another to service the interrupt(s)
    + */
    +enum fmc_irq_handler_index {
    + FM_SEND_FLAG_GETCMD_INDEX,
    + FM_HANDLE_FLAG_GETCMD_RESP_INDEX,
    +
    + /* HW malfunction irq handler */
    + FM_HW_MAL_FUNC_INDEX,
    +
    + /* RDS threshold reached irq handler */
    + FM_RDS_START_INDEX,
    + FM_RDS_SEND_RDS_GETCMD_INDEX,
    + FM_RDS_HANDLE_RDS_GETCMD_RESP_INDEX,
    + FM_RDS_FINISH_INDEX,
    +
    + /* Tune operation ended irq handler */
    + FM_HW_TUNE_OP_ENDED_INDEX,
    +
    + /* TX power enable irq handler */
    + FM_HW_POWER_ENB_INDEX,
    +
    + /* Low RSSI irq handler */
    + FM_LOW_RSSI_START_INDEX,
    + FM_AF_JUMP_SETPI_INDEX,
    + FM_AF_JUMP_HANDLE_SETPI_RESP_INDEX,
    + FM_AF_JUMP_SETPI_MASK_INDEX,
    + FM_AF_JUMP_HANDLE_SETPI_MASK_RESP_INDEX,
    + FM_AF_JUMP_SET_AF_FREQ_INDEX,
    + FM_AF_JUMP_HENDLE_SET_AFFREQ_RESP_INDEX,
    + FM_AF_JUMP_ENABLE_INT_INDEX,
    + FM_AF_JUMP_ENABLE_INT_RESP_INDEX,
    + FM_AF_JUMP_START_AFJUMP_INDEX,
    + FM_AF_JUMP_HANDLE_START_AFJUMP_RESP_INDEX,
    + FM_AF_JUMP_RD_FREQ_INDEX,
    + FM_AF_JUMP_RD_FREQ_RESP_INDEX,
    + FM_LOW_RSSI_FINISH_INDEX,
    +
    + /* Interrupt process post action */
    + FM_SEND_INTMSK_CMD_INDEX,
    + FM_HANDLE_INTMSK_CMD_RESP_INDEX,
    +};
    +
    +/* FM interrupt handler table */
    +static int_handler_prototype g_IntHandlerTable[] = {
    + fm_irq_send_flag_getcmd,
    + fm_irq_handle_flag_getcmd_resp,
    + fm_irq_handle_hw_malfunction,
    + fm_irq_handle_rds_start, /* RDS threshold reached irq handler */
    + fm_irq_send_rdsdata_getcmd,
    + fm_irq_handle_rdsdata_getcmd_resp,
    + fm_irq_handle_rds_finish,
    + fm_irq_handle_tune_op_ended,
    + fm_irq_handle_power_enb, /* TX power enable irq handler */
    + fm_irq_handle_low_rssi_start,
    + fm_irq_afjump_set_pi,
    + fm_irq_handle_set_pi_resp,
    + fm_irq_afjump_set_pimask,
    + fm_irq_handle_set_pimask_resp,
    + fm_irq_afjump_setfreq,
    + fm_irq_handle_setfreq_resp,
    + fm_irq_afjump_enableint,
    + fm_irq_afjump_enableint_resp,
    + fm_irq_start_afjump,
    + fm_irq_handle_start_afjump_resp,
    + fm_irq_afjump_rd_freq,
    + fm_irq_afjump_rd_freq_resp,
    + fm_irq_handle_low_rssi_finish,
    + fm_irq_send_intmsk_cmd, /* Interrupt process post action */
    + fm_irq_handle_intmsk_cmd_resp
    +};
    +
    +long (*g_st_write) (struct sk_buff *skb);
    +static struct completion wait_for_fmdrv_reg_comp;
    +
    +#ifdef FM_DUMP_TXRX_PKT
    + /* To dump outgoing FM Channel-8 packets */
    +inline void dump_tx_skb_data(struct sk_buff *skb)
    +{
    + int len, len_org;
    + char index;
    + struct fm_cmd_msg_hdr *cmd_hdr;
    +
    + cmd_hdr = (struct fm_cmd_msg_hdr *)skb->data;
    + printk(KERN_INFO "<<%shdr:%02x len:%02x opcode:%02x type:%s dlen:%02x",
    + fm_cb(skb)->completion ? " " : "*", cmd_hdr->header,
    + cmd_hdr->len, cmd_hdr->fm_opcode,
    + cmd_hdr->rd_wr ? "RD" : "WR", cmd_hdr->dlen);
    +
    + len_org = skb->len - FM_CMD_MSG_HDR_SIZE;
    + if (len_org > 0) {
    + printk("\n data(%d): ", cmd_hdr->dlen);
    + len = min(len_org, 14);
    + for (index = 0; index < len; index++)
    + printk("%x ",
    + skb->data[FM_CMD_MSG_HDR_SIZE + index]);
    + printk("%s", (len_org > 14) ? ".." : "");
    + }
    + printk("\n");
    +}
    +
    + /* To dump incoming FM Channel-8 packets */
    +inline void dump_rx_skb_data(struct sk_buff *skb)
    +{
    + int len, len_org;
    + char index;
    + struct fm_event_msg_hdr *evt_hdr;
    +
    + evt_hdr = (struct fm_event_msg_hdr *)skb->data;
    + printk(KERN_INFO ">> hdr:%02x len:%02x sts:%02x numhci:%02x "
    + "opcode:%02x type:%s dlen:%02x", evt_hdr->header, evt_hdr->len,
    + evt_hdr->status, evt_hdr->num_fm_hci_cmds, evt_hdr->fm_opcode,
    + (evt_hdr->rd_wr) ? "RD" : "WR", evt_hdr->dlen);
    +
    + len_org = skb->len - FM_EVT_MSG_HDR_SIZE;
    + if (len_org > 0) {
    + printk("\n data(%d): ", evt_hdr->dlen);
    + len = min(len_org, 14);
    + for (index = 0; index < len; index++)
    + printk("%x ",
    + skb->data[FM_EVT_MSG_HDR_SIZE + index]);
    + printk("%s", (len_org > 14) ? ".." : "");
    + }
    + printk("\n");
    +}
    +#endif
    +
    +void fmc_update_region_info(struct fmdrv_ops *fmdev,
    + unsigned char region_to_set)
    +{
    + memcpy(&fmdev->rx.region, &region_configs[region_to_set],
    + sizeof(struct region_info));
    +}
    +
    +/*
    + * FM common sub-module will schedule this tasklet whenever it receives
    + * FM packet from ST driver.
    + */
    +static void __recv_tasklet(unsigned long arg)
    +{
    + struct fmdrv_ops *fmdev;
    + struct fm_event_msg_hdr *fm_evt_hdr;
    + struct sk_buff *skb;
    + unsigned char num_fm_hci_cmds;
    + unsigned long flags;
    +
    + fmdev = (struct fmdrv_ops *)arg;
    + /* Process all packets in the RX queue */
    + while ((skb = skb_dequeue(&fmdev->rx_q))) {
    + if (skb->len < sizeof(struct fm_event_msg_hdr)) {
    + pr_err("(fmdrv): skb(%p) has only %d bytes"
    + "atleast need %d bytes to decode\n",
    + skb, skb->len,
    + sizeof(struct fm_event_msg_hdr));
    + kfree_skb(skb);
    + continue;
    + }
    +
    + fm_evt_hdr = (void *)skb->data;
    + num_fm_hci_cmds = fm_evt_hdr->num_fm_hci_cmds;
    +
    + /* FM interrupt packet? */
    + if (fm_evt_hdr->fm_opcode == FM_INTERRUPT) {
    + /* FM interrupt handler started already? */
    + if (!test_bit(FM_INTTASK_RUNNING, &fmdev->flag)) {
    + set_bit(FM_INTTASK_RUNNING, &fmdev->flag);
    + if (fmdev->irq_info.stage_index != 0) {
    + pr_err("(fmdrv): Invalid stage index,"
    + "resetting to zero\n");
    + fmdev->irq_info.stage_index = 0;
    + }
    +
    + /*
    + * Execute first function in interrupt handler
    + * table.
    + */
    + fmdev->irq_info.fm_int_handlers
    + [fmdev->irq_info.stage_index](fmdev);
    + } else {
    + set_bit(FM_INTTASK_SCHEDULE_PENDING,
    + &fmdev->flag);
    + }
    + kfree_skb(skb);
    + }
    + /* Anyone waiting for this with completion handler? */
    + else if (fm_evt_hdr->fm_opcode == fmdev->last_sent_pkt_opcode &&
    + fmdev->response_completion != NULL) {
    + if (fmdev->response_skb != NULL)
    + pr_err("(fmdrv): Response SKB ptr not NULL\n");
    +
    + spin_lock_irqsave(&fmdev->resp_skb_lock, flags);
    + fmdev->response_skb = skb;
    + spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);
    + complete(fmdev->response_completion);
    +
    + fmdev->response_completion = NULL;
    + atomic_set(&fmdev->tx_cnt, 1);
    + }
    + /* Is this for interrupt handler? */
    + else if (fm_evt_hdr->fm_opcode == fmdev->last_sent_pkt_opcode &&
    + fmdev->response_completion == NULL) {
    + if (fmdev->response_skb != NULL)
    + pr_err("(fmdrv): Response SKB ptr not NULL\n");
    +
    + spin_lock_irqsave(&fmdev->resp_skb_lock, flags);
    + fmdev->response_skb = skb;
    + spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);
    +
    + /* Execute interrupt handler where state index points */
    + fmdev->irq_info.fm_int_handlers
    + [fmdev->irq_info.stage_index](fmdev);
    +
    + kfree_skb(skb);
    + atomic_set(&fmdev->tx_cnt, 1);
    + } else {
    + pr_err("(fmdrv): Nobody claimed SKB(%p),purging\n",
    + skb);
    + }
    +
    + /*
    + * Check flow control field. If Num_FM_HCI_Commands field is
    + * not zero, schedule FM TX tasklet.
    + */
    + if (num_fm_hci_cmds && atomic_read(&fmdev->tx_cnt))
    + if (!skb_queue_empty(&fmdev->tx_q))
    + tasklet_schedule(&fmdev->tx_task);
    + }
    +}
    +
    +/* FM send tasklet: is scheduled when FM packet has to be sent to chip */
    +static void __send_tasklet(unsigned long arg)
    +{
    + struct fmdrv_ops *fmdev;
    + struct sk_buff *skb;
    + int len;
    +
    + fmdev = (struct fmdrv_ops *)arg;
    + /* Check, is there any timeout happenned to last transmitted packet */
    + if (!atomic_read(&fmdev->tx_cnt) &&
    + ((jiffies - fmdev->last_tx_jiffies) > FM_DRV_TX_TIMEOUT)) {
    + pr_err("(fmdrv): TX timeout occurred\n");
    + atomic_set(&fmdev->tx_cnt, 1);
    + }
    + /* Send queued FM TX packets */
    + if (atomic_read(&fmdev->tx_cnt)) {
    + skb = skb_dequeue(&fmdev->tx_q);
    + if (skb) {
    + atomic_dec(&fmdev->tx_cnt);
    + fmdev->last_sent_pkt_opcode = fm_cb(skb)->fm_opcode;
    +
    + if (fmdev->response_completion != NULL)
    + pr_err("(fmdrv): Response completion handler"
    + "is not NULL\n");
    +
    + fmdev->response_completion = fm_cb(skb)->completion;
    +
    + /* Write FM packet to ST driver */
    + len = g_st_write(skb);
    + if (len < 0) {
    + kfree_skb(skb);
    + fmdev->response_completion = NULL;
    + pr_err("(fmdrv): TX tasklet failed to send"
    + "skb(%p)\n", skb);
    + atomic_set(&fmdev->tx_cnt, 1);
    + } else {
    + fmdev->last_tx_jiffies = jiffies;
    + }
    + }
    + }
    +}
    +
    +/*
    + * Queues FM Channel-8 packet to FM TX queue and schedules FM TX tasklet for
    + * transmission
    + */
    +static int __fm_send_cmd(struct fmdrv_ops *fmdev, unsigned char fm_opcode,
    + unsigned short int type, void *payload,
    + int payload_len,
    + struct completion *wait_completion)
    +{
    + struct sk_buff *skb;
    + struct fm_cmd_msg_hdr *cmd_hdr;
    + int size;
    +
    +
    + if (fm_opcode >= FM_INTERRUPT) {
    + pr_err("(fmdrv): Invalid fm register index\n");
    + return -EINVAL;
    + }
    + if (test_bit(FM_FIRMWARE_DW_INPROGRESS, &fmdev->flag) &&
    + payload == NULL) {
    + pr_err("(fmdrv): Payload data is NULL during fw download\n");
    + return -EINVAL;
    + }
    + if (!test_bit(FM_FIRMWARE_DW_INPROGRESS, &fmdev->flag))
    + size =
    + FM_CMD_MSG_HDR_SIZE + ((payload == NULL) ? 0 : payload_len);
    + else
    + size = payload_len;
    +
    + skb = alloc_skb(size, GFP_ATOMIC);
    + if (!skb) {
    + pr_err("(fmdrv): No memory to create new SKB\n");
    + return -ENOMEM;
    + }
    + /*
    + * Don't fill FM header info for the commands which come from
    + * FM firmware file.
    + */
    + if (!test_bit(FM_FIRMWARE_DW_INPROGRESS, &fmdev->flag) ||
    + test_bit(FM_INTTASK_RUNNING, &fmdev->flag)) {
    + /* Fill command header info */
    + cmd_hdr =
    + (struct fm_cmd_msg_hdr *)skb_put(skb, FM_CMD_MSG_HDR_SIZE);
    + cmd_hdr->header = FM_PKT_LOGICAL_CHAN_NUMBER; /* 0x08 */
    + /* 3 (fm_opcode,rd_wr,dlen) + payload len) */
    + cmd_hdr->len = ((payload == NULL) ? 0 : payload_len) + 3;
    + /* FM opcode */
    + cmd_hdr->fm_opcode = fm_opcode;
    + /* read/write type */
    + cmd_hdr->rd_wr = type;
    + cmd_hdr->dlen = payload_len;
    + fm_cb(skb)->fm_opcode = fm_opcode;
    + /*
    + * If firmware download has finished and the command is
    + * not a read command then payload is != NULL - a write
    + * command with unsigned short payload - convert to be16
    + */
    + if (payload != NULL)
    + *(unsigned short *)payload =
    + cpu_to_be16(*(unsigned short *)payload);
    + } else if (payload != NULL) {
    + fm_cb(skb)->fm_opcode = *((char *)payload + 2);
    + }
    + if (payload != NULL)
    + memcpy(skb_put(skb, payload_len), payload, payload_len);
    +
    + fm_cb(skb)->completion = wait_completion;
    + skb_queue_tail(&fmdev->tx_q, skb);
    + tasklet_schedule(&fmdev->tx_task);
    +
    + return 0;
    +}
    +
    +/* Sends FM Channel-8 command to the chip and waits for the reponse */
    +int fmc_send_cmd(struct fmdrv_ops *fmdev, unsigned char fm_opcode,
    + unsigned short int type, void *payload, int payload_len,
    + void *reponse, int *reponse_len)
    +{
    + struct sk_buff *skb;
    + struct fm_event_msg_hdr *fm_evt_hdr;
    + unsigned long timeleft;
    + unsigned long flags;
    + int ret;
    +
    + init_completion(&fmdev->maintask_completion);
    + ret = __fm_send_cmd(fmdev, fm_opcode, type, payload, payload_len,
    + &fmdev->maintask_completion);
    + if (ret < 0)
    + goto exit;
    +
    + timeleft = wait_for_completion_timeout(&fmdev->maintask_completion,
    + FM_DRV_TX_TIMEOUT);
    + if (!timeleft) {
    + pr_err("(fmdrv): Timeout(%d sec),didn't get reg"
    + "completion signal from RX tasklet\n",
    + jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000);
    + return -ETIMEDOUT;
    + goto exit;
    + }
    + if (!fmdev->response_skb) {
    + pr_err("(fmdrv): Reponse SKB is missing\n");
    + return -EFAULT;
    + goto exit;
    + }
    + spin_lock_irqsave(&fmdev->resp_skb_lock, flags);
    + skb = fmdev->response_skb;
    + fmdev->response_skb = NULL;
    + spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);
    +
    + fm_evt_hdr = (void *)skb->data;
    + if (fm_evt_hdr->status != 0) {
    + pr_err("(fmdrv): Received event pkt status(%d) is not zero\n",
    + fm_evt_hdr->status);
    + kfree_skb(skb);
    + ret = -EIO;
    + goto exit;
    + }
    + /* Send reponse data to caller */
    + if (reponse != NULL && reponse_len != NULL && fm_evt_hdr->dlen) {
    + /* Skip header info and copy only response data */
    + skb_pull(skb, sizeof(struct fm_event_msg_hdr));
    + memcpy(reponse, skb->data, fm_evt_hdr->dlen);
    + *reponse_len = fm_evt_hdr->dlen;
    + } else if (reponse_len != NULL && fm_evt_hdr->dlen == 0) {
    + *reponse_len = 0;
    + }
    + kfree_skb(skb);
    +exit:
    + if (ret < 0) {
    + pr_err("(fmdrv): Command %d failed\n", fm_opcode);
    + return ret;
    + }
    +
    + return ret;
    +}
    +
    +/* --- Helper functions used in FM interrupt handlers ---*/
    +static inline int __check_cmdresp_status(struct fmdrv_ops *fmdev,
    + struct sk_buff **skb)
    +{
    + struct fm_event_msg_hdr *fm_evt_hdr;
    + unsigned long flags;
    +
    + del_timer(&fmdev->irq_info.int_timeout_timer);
    +
    + spin_lock_irqsave(&fmdev->resp_skb_lock, flags);
    + *skb = fmdev->response_skb;
    + fmdev->response_skb = NULL;
    + spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);
    +
    + fm_evt_hdr = (void *)(*skb)->data;
    + if (fm_evt_hdr->status != 0) {
    + pr_err("(fmdrv): irq: opcode %x response status is not zero "
    + "Initiating irq recovery process\n",
    + fm_evt_hdr->fm_opcode);
    +
    + mod_timer(&fmdev->irq_info.int_timeout_timer, jiffies +
    + FM_DRV_TX_TIMEOUT);
    + return -1;
    + }
    +
    + return 0;
    +}
    +
    +/*
    + * Interrupt process timeout handler.
    + * One of the irq handler did not get proper response from the chip. So take
    + * recovery action here. FM interrupts are disabled in the beginning of
    + * interrupt process. Therefore reset stage index to re-enable default
    + * interrupts. So that next interrupt will be processed as usual.
    + */
    +static void __int_timeout_handler(unsigned long data)
    +{
    + struct fmdrv_ops *fmdev;
    +
    + pr_debug("(fmdrv): irq: timeout,trying to re-enable fm interrupts\n");
    + fmdev = (struct fmdrv_ops *)data;
    + fmdev->irq_info.irq_service_timeout_retry++;
    +
    + if (fmdev->irq_info.irq_service_timeout_retry <=
    + FM_IRQ_TIMEOUT_RETRY_MAX) {
    + fmdev->irq_info.stage_index = FM_SEND_INTMSK_CMD_INDEX;
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.
    + stage_index] (fmdev);
    + } else {
    + /*
    + * Stop recovery action (interrupt reenable process) and
    + * reset stage index & retry count values
    + */
    + fmdev->irq_info.stage_index = 0;
    + fmdev->irq_info.irq_service_timeout_retry = 0;
    + pr_err("(fmdrv): Recovery action failed during"
    + "irq processing, max retry reached\n");
    + }
    +}
    +
    +/* --------- FM interrupt handlers ------------*/
    +static void fm_irq_send_flag_getcmd(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + unsigned short flag;
    + int ret;
    +
    + fmdev = arg;
    + /* Send FLAG_GET command , to know the source of interrupt */
    + ret = __fm_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, sizeof(flag), NULL);
    + if (ret)
    + pr_err("(fmdrv): irq: failed to send flag_get command,"
    + "initiating irq recovery process\n");
    + else
    + fmdev->irq_info.stage_index = FM_HANDLE_FLAG_GETCMD_RESP_INDEX;
    +
    + mod_timer(&fmdev->irq_info.int_timeout_timer, jiffies +
    + FM_DRV_TX_TIMEOUT);
    +}
    +
    +static void fm_irq_handle_flag_getcmd_resp(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + struct sk_buff *skb;
    + struct fm_event_msg_hdr *fm_evt_hdr;
    + char ret;
    +
    + fmdev = arg;
    +
    + ret = __check_cmdresp_status(fmdev, &skb);
    + if (ret < 0)
    + return;
    +
    + fm_evt_hdr = (void *)skb->data;
    +
    + /* Skip header info and copy only response data */
    + skb_pull(skb, sizeof(struct fm_event_msg_hdr));
    + memcpy(&fmdev->irq_info.flag, skb->data, fm_evt_hdr->dlen);
    +
    + fmdev->irq_info.flag = be16_to_cpu(fmdev->irq_info.flag);
    + pr_debug("(fmdrv): irq: flag register(0x%x)\n", fmdev->irq_info.flag);
    +
    + /* Continue next function in interrupt handler table */
    + fmdev->irq_info.stage_index = FM_HW_MAL_FUNC_INDEX;
    +
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +static void fm_irq_handle_hw_malfunction(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    +
    + fmdev = arg;
    + if (fmdev->irq_info.flag & FM_MAL_EVENT & fmdev->irq_info.mask)
    + pr_err("(fmdrv): irq: HW MAL int received - do nothing\n");
    +
    + /* Continue next function in interrupt handler table */
    + fmdev->irq_info.stage_index = FM_RDS_START_INDEX;
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +static void fm_irq_handle_rds_start(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    +
    + fmdev = arg;
    + if (fmdev->irq_info.flag & FM_RDS_EVENT & fmdev->irq_info.mask) {
    + pr_debug("(fmdrv): irq: rds threshold reached\n");
    + fmdev->irq_info.stage_index = FM_RDS_SEND_RDS_GETCMD_INDEX;
    + } else {
    + /* Continue next function in interrupt handler table */
    + fmdev->irq_info.stage_index = FM_HW_TUNE_OP_ENDED_INDEX;
    + }
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +static void fm_irq_send_rdsdata_getcmd(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + int ret;
    +
    + fmdev = arg;
    + /* Send the command to read RDS data from the chip */
    + ret = __fm_send_cmd(fmdev, RDS_DATA_GET, REG_RD, NULL,
    + (FM_RX_RDS_FIFO_THRESHOLD * 3), NULL);
    + if (ret < 0)
    + pr_err("(fmdrv): irq : failed to send rds get command,"
    + "initiating irq recovery process\n");
    + else
    + fmdev->irq_info.stage_index =
    + FM_RDS_HANDLE_RDS_GETCMD_RESP_INDEX;
    +
    + /* Start timer to track timeout */
    + mod_timer(&fmdev->irq_info.int_timeout_timer, jiffies +
    + FM_DRV_TX_TIMEOUT);
    +}
    +
    +/* Keeps track of current RX channel AF (Alternate Frequency) */
    +static void __fm_rx_update_af_cache(struct fmdrv_ops *fmdev,
    + unsigned char af)
    +{
    + unsigned char index;
    + unsigned int freq;
    +
    + /* First AF indicates the number of AF follows. Reset the list */
    + if ((af >= FM_RDS_1_AF_FOLLOWS) && (af <= FM_RDS_25_AF_FOLLOWS)) {
    + fmdev->rx.cur_station_info.af_list_max =
    + (af - FM_RDS_1_AF_FOLLOWS + 1);
    + fmdev->rx.cur_station_info.no_of_items_in_afcache = 0;
    + pr_debug("(fmdrv): No of expected AF : %d\n",
    + fmdev->rx.cur_station_info.af_list_max);
    + } else if (((af >= FM_RDS_MIN_AF)
    + && (fmdev->rx.region.region_index == FM_BAND_EUROPE_US)
    + && (af <= FM_RDS_MAX_AF)) || ((af >= FM_RDS_MIN_AF)
    + && (fmdev->rx.region.
    + region_index ==
    + FM_BAND_JAPAN)
    + && (af <=
    + FM_RDS_MAX_AF_JAPAN))) {
    + freq = fmdev->rx.region.bottom_frequency + (af * 100);
    + if (freq == fmdev->rx.curr_freq) {
    + pr_debug("(fmdrv): Current frequency(%d) is"
    + "matching with received AF(%d)\n",
    + fmdev->rx.curr_freq, freq);
    + return;
    + }
    + /* Do check in AF cache */
    + for (index = 0;
    + index < fmdev->rx.cur_station_info.no_of_items_in_afcache;
    + index++) {
    + if (fmdev->rx.cur_station_info.af_cache[index] == freq)
    + break;
    + }
    + /* Reached the limit of the list - ignore the next AF */
    + if (index == fmdev->rx.cur_station_info.af_list_max) {
    + pr_debug("(fmdrv): AF cache is full\n");
    + return;
    + }
    + /*
    + * If we reached the end of the list then this AF is not
    + * in the list - add it.
    + */
    + if (index == fmdev->rx.cur_station_info.
    + no_of_items_in_afcache) {
    + pr_debug("(fmdrv): Storing AF %d to cache index %d\n",
    + freq, index);
    + fmdev->rx.cur_station_info.af_cache[index] = freq;
    + fmdev->rx.cur_station_info.no_of_items_in_afcache++;
    + }
    + }
    +}
    +
    +/*
    + * Converts RDS buffer data from big endian format
    + * to little endian format.
    + */
    +static void __fm_rdsparse_swapbytes(struct fmdrv_ops *fmdev,
    + struct fm_rdsdata_format *rds_format)
    +{
    + unsigned char byte1;
    + unsigned char index = 0;
    + char *rds_buff;
    +
    + /*
    + * Since in Orca the 2 RDS Data bytes are in little endian and
    + * in Dolphin they are in big endian, the parsing of the RDS data
    + * is chip dependent
    + */
    + if (fmdev->asci_id != 0x6350) {
    + rds_buff = &rds_format->rdsdata.groupdatabuff.rdsbuff[0];
    + while (index + 1 < FM_RX_RDS_INFO_FIELD_MAX) {
    + byte1 = rds_buff[index];
    + rds_buff[index] = rds_buff[index + 1];
    + rds_buff[index + 1] = byte1;
    + index += 2;
    + }
    + }
    +}
    +
    +static void fm_irq_handle_rdsdata_getcmd_resp(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + struct sk_buff *skb;
    + char *rds_data;
    + char meta_data;
    + unsigned char type, block_index;
    + unsigned long group_index;
    + struct fm_rdsdata_format rds_format;
    + int rds_len, ret;
    + unsigned short cur_picode;
    + unsigned char tmpbuf[3];
    + unsigned long flags;
    +
    + fmdev = arg;
    +
    + ret = __check_cmdresp_status(fmdev, &skb);
    + if (ret < 0)
    + return;
    +
    + /* Skip header info */
    + skb_pull(skb, sizeof(struct fm_event_msg_hdr));
    + rds_data = skb->data;
    + rds_len = skb->len;
    +
    + /* Parse the RDS data */
    + while (rds_len >= FM_RDS_BLOCK_SIZE) {
    + meta_data = rds_data[2];
    + /*
    + * Get the type:
    + * 0=A, 1=B, 2=C, 3=C', 4=D, 5=E
    + */
    + type = (meta_data & 0x07);
    +
    + /*
    + * Transform the block type into an
    + * index sequence (0, 1, 2, 3, 4)
    + */
    + block_index = (type <= FM_RDS_BLOCK_C ? type : (type - 1));
    + pr_debug("(fmdrv): Block index:%d(%s)\n", block_index,
    + (meta_data & FM_RDS_STATUS_ERROR_MASK) ? "Bad" :
    + "Ok");
    + if (((meta_data & FM_RDS_STATUS_ERROR_MASK) == 0)
    + && (block_index == FM_RDS_BLOCK_INDEX_A
    + || (block_index == fmdev->rx.rds.last_block_index + 1
    + && block_index <= FM_RDS_BLOCK_INDEX_D))) {
    + /*
    + * Skip checkword (control) byte and copy only data
    + * byte
    + */
    + memcpy(&rds_format.rdsdata.groupdatabuff.
    + rdsbuff[block_index * (FM_RDS_BLOCK_SIZE - 1)],
    + rds_data, (FM_RDS_BLOCK_SIZE - 1));
    + fmdev->rx.rds.last_block_index = block_index;
    +
    + /* If completed a whole group then handle it */
    + if (block_index == FM_RDS_BLOCK_INDEX_D) {
    + pr_debug("(fmdrv): Good block received\n");
    + __fm_rdsparse_swapbytes(fmdev, &rds_format);
    +
    + /*
    + * Extract PI code and store in local cache.
    + * We need this during AF switch processing.
    + */
    + cur_picode = be16_to_cpu
    + (rds_format.rdsdata.groupgeneral.pidata);
    + if (fmdev->rx.cur_station_info.picode !=
    + cur_picode)
    + fmdev->rx.cur_station_info.picode =
    + cur_picode;
    + pr_debug("(fmdrv): picode:%d\n", cur_picode);
    +
    + group_index =
    + (rds_format.rdsdata.groupgeneral.
    + block_b_byte1 >> 3);
    + pr_debug("(fmdrv):Group:%ld%s\n", group_index/2,
    + (group_index % 2) ? "B" : "A");
    +
    + group_index =
    + 1 << (rds_format.rdsdata.groupgeneral.
    + block_b_byte1 >> 3);
    + if (group_index == FM_RDS_GROUP_TYPE_MASK_0A) {
    + __fm_rx_update_af_cache
    + (fmdev, rds_format.rdsdata.
    + group0A.firstaf);
    + __fm_rx_update_af_cache
    + (fmdev, rds_format.
    + rdsdata.group0A.secondaf);
    + }
    + }
    + } else {
    + pr_debug("(fmdrv): Block sequence mismatch\n");
    + fmdev->rx.rds.last_block_index = -1;
    + }
    + rds_len -= FM_RDS_BLOCK_SIZE;
    + rds_data += FM_RDS_BLOCK_SIZE;
    + }
    +
    + /* Copy raw rds data to internal rds buffer */
    + rds_data = skb->data;
    + rds_len = skb->len;
    +
    + spin_lock_irqsave(&fmdev->rds_buff_lock, flags);
    + while (rds_len > 0) {
    + /*
    + * Fill RDS buffer as per V4L2 specification.
    + * Store control byte
    + */
    + type = (rds_data[2] & 0x07);
    + block_index = (type <= FM_RDS_BLOCK_C ? type : (type - 1));
    + tmpbuf[2] = block_index; /* Offset name */
    + tmpbuf[2] |= block_index << 3; /* Received offset */
    +
    + /* Store data byte */
    + tmpbuf[0] = rds_data[0];
    + tmpbuf[1] = rds_data[1];
    +
    + memcpy(&fmdev->rx.rds.buffer[fmdev->rx.rds.wr_index], &tmpbuf,
    + FM_RDS_BLOCK_SIZE);
    + fmdev->rx.rds.wr_index =
    + (fmdev->rx.rds.wr_index +
    + FM_RDS_BLOCK_SIZE) % fmdev->rx.rds.buf_size;
    +
    + /* Check for overflow & start over */
    + if (fmdev->rx.rds.wr_index == fmdev->rx.rds.rd_index) {
    + pr_debug("(fmdrv): RDS buffer overflow\n");
    + fmdev->rx.rds.wr_index = 0;
    + fmdev->rx.rds.rd_index = 0;
    + break;
    + }
    + rds_len -= FM_RDS_BLOCK_SIZE;
    + rds_data += FM_RDS_BLOCK_SIZE;
    + }
    + spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags);
    +
    + /* Wakeup read queue */
    + if (fmdev->rx.rds.wr_index != fmdev->rx.rds.rd_index)
    + wake_up_interruptible(&fmdev->rx.rds.read_queue);
    +
    + fmdev->irq_info.stage_index = FM_RDS_FINISH_INDEX;
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +static void fm_irq_handle_rds_finish(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    +
    + fmdev = arg;
    + /* Continue next function in interrupt handler table */
    + fmdev->irq_info.stage_index = FM_HW_TUNE_OP_ENDED_INDEX;
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +static void fm_irq_handle_tune_op_ended(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + fmdev = arg;
    + if (fmdev->irq_info.flag & (FM_FR_EVENT | FM_BL_EVENT) & fmdev->
    + irq_info.mask) {
    + pr_debug("(fmdrv): irq: tune ended/bandlimit reached\n");
    + if (test_and_clear_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag)) {
    + fmdev->irq_info.stage_index = FM_AF_JUMP_RD_FREQ_INDEX;
    + } else {
    + complete(&fmdev->maintask_completion);
    + fmdev->irq_info.stage_index = FM_HW_POWER_ENB_INDEX;
    + }
    + } else
    + fmdev->irq_info.stage_index = FM_HW_POWER_ENB_INDEX;
    +
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +static void fm_irq_handle_power_enb(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    +
    + fmdev = arg;
    + if (fmdev->irq_info.flag & FM_POW_ENB_EVENT) {
    + pr_debug("(fmdrv): irq: Power Enabled/Disabled\n");
    + complete(&fmdev->maintask_completion);
    + }
    +
    + /* Continue next function in interrupt handler table */
    + fmdev->irq_info.stage_index = FM_LOW_RSSI_START_INDEX;
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +static void fm_irq_handle_low_rssi_start(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    +
    + fmdev = arg;
    + if ((fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON) &&
    + (fmdev->irq_info.flag & FM_LEV_EVENT & fmdev->irq_info.mask) &&
    + (fmdev->rx.curr_freq != FM_UNDEFINED_FREQ) &&
    + (fmdev->rx.cur_station_info.no_of_items_in_afcache != 0)) {
    + pr_debug("(fmdrv): irq: rssi level has fallen below"
    + " threshold level\n");
    +
    + /* Disable further low RSSI interrupts */
    + fmdev->irq_info.mask &= ~FM_LEV_EVENT;
    +
    + fmdev->rx.cur_afjump_index = 0;
    + fmdev->rx.freq_before_jump = fmdev->rx.curr_freq;
    + fmdev->irq_info.stage_index = FM_AF_JUMP_SETPI_INDEX;
    + } else {
    + /* Continue next function in interrupt handler table */
    + fmdev->irq_info.stage_index = FM_SEND_INTMSK_CMD_INDEX;
    + }
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +static void fm_irq_afjump_set_pi(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + int ret;
    + unsigned short payload;
    +
    + fmdev = arg;
    + /* Set PI code - must be updated if the AF list is not empty */
    + payload = fmdev->rx.cur_station_info.picode;
    + ret = __fm_send_cmd(fmdev, RDS_PI_SET, REG_WR, &payload,
    + sizeof(payload), NULL);
    + if (ret < 0)
    + pr_err("(fmdrv): irq : failed to set PI,"
    + "initiating irq recovery process\n");
    + else
    + fmdev->irq_info.stage_index =
    + FM_AF_JUMP_HANDLE_SETPI_RESP_INDEX;
    +
    + mod_timer(&fmdev->irq_info.int_timeout_timer, jiffies +
    + FM_DRV_TX_TIMEOUT);
    +}
    +
    +static void fm_irq_handle_set_pi_resp(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + struct sk_buff *skb;
    + int ret;
    +
    + fmdev = arg;
    +
    + ret = __check_cmdresp_status(fmdev, &skb);
    + if (ret < 0)
    + return;
    +
    + /* Continue next function in interrupt handler table */
    + fmdev->irq_info.stage_index = FM_AF_JUMP_SETPI_MASK_INDEX;
    +
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +/*
    + * Set PI mask.
    + * 0xFFFF = Enable PI code matching
    + * 0x0000 = Disable PI code matching
    + */
    +static void fm_irq_afjump_set_pimask(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + int ret;
    + unsigned short payload;
    +
    + fmdev = arg;
    + payload = 0x0000;
    + ret = __fm_send_cmd(fmdev, RDS_PI_MASK_SET, REG_WR, &payload,
    + sizeof(payload), NULL);
    + if (ret < 0)
    + pr_err("(fmdrv): irq: failed to set PI mask, "
    + "initiating irq recovery process\n");
    + else
    + fmdev->irq_info.stage_index =
    + FM_AF_JUMP_HANDLE_SETPI_MASK_RESP_INDEX;
    +
    + mod_timer(&fmdev->irq_info.int_timeout_timer, jiffies +
    + FM_DRV_TX_TIMEOUT);
    +}
    +
    +static void fm_irq_handle_set_pimask_resp(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + struct sk_buff *skb;
    + int ret;
    +
    + fmdev = arg;
    +
    + ret = __check_cmdresp_status(fmdev, &skb);
    + if (ret < 0)
    + return;
    +
    + /* Continue next function in interrupt handler table */
    + fmdev->irq_info.stage_index = FM_AF_JUMP_SET_AF_FREQ_INDEX;
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +static void fm_irq_afjump_setfreq(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + unsigned short frq_index;
    + unsigned short payload;
    + int ret;
    +
    + fmdev = arg;
    + pr_debug("(fmdrv): Swtiching to %d KHz\n",
    + fmdev->rx.cur_station_info.af_cache[fmdev->rx.cur_afjump_index]);
    + frq_index =
    + (fmdev->rx.cur_station_info.af_cache[fmdev->rx.cur_afjump_index] -
    + fmdev->rx.region.bottom_frequency) / FM_FREQ_MUL;
    +
    + payload = frq_index;
    + ret = __fm_send_cmd(fmdev, AF_FREQ_SET, REG_WR, &payload,
    + sizeof(payload), NULL);
    + if (ret < 0)
    + pr_err("(fmdrv): irq : failed to set AF freq, "
    + "initiating irq recovery process\n");
    + else
    + fmdev->irq_info.stage_index =
    + FM_AF_JUMP_HENDLE_SET_AFFREQ_RESP_INDEX;
    +
    + mod_timer(&fmdev->irq_info.int_timeout_timer, jiffies +
    + FM_DRV_TX_TIMEOUT);
    +}
    +
    +static void fm_irq_handle_setfreq_resp(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + struct sk_buff *skb;
    + int ret;
    +
    + fmdev = arg;
    +
    + ret = __check_cmdresp_status(fmdev, &skb);
    + if (ret < 0) {
    + return;
    + } else {
    + /* Continue next function in interrupt handler table */
    + fmdev->irq_info.stage_index = FM_AF_JUMP_ENABLE_INT_INDEX;
    + }
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +static void fm_irq_afjump_enableint(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + unsigned short payload;
    + int ret;
    +
    + fmdev = arg;
    + /* Enable FR (tuning operation ended) interrupt */
    + payload = FM_FR_EVENT;
    + ret = __fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
    + sizeof(payload), NULL);
    + if (ret)
    + pr_err("(fmdrv): irq : failed to enable FR interrupt, "
    + "initiating irq recovery process\n");
    + else
    + fmdev->irq_info.stage_index = FM_AF_JUMP_ENABLE_INT_RESP_INDEX;
    +
    + mod_timer(&fmdev->irq_info.int_timeout_timer, jiffies +
    + FM_DRV_TX_TIMEOUT);
    +}
    +
    +static void fm_irq_afjump_enableint_resp(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + struct sk_buff *skb;
    + int ret;
    +
    + fmdev = arg;
    +
    + ret = __check_cmdresp_status(fmdev, &skb);
    + if (ret < 0)
    + return;
    +
    + /* Continue next function in interrupt handler table */
    + fmdev->irq_info.stage_index = FM_AF_JUMP_START_AFJUMP_INDEX;
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +static void fm_irq_start_afjump(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + unsigned short payload;
    + int ret;
    +
    + fmdev = arg;
    + payload = FM_TUNER_AF_JUMP_MODE;
    + ret = __fm_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,
    + sizeof(payload), NULL);
    + if (ret)
    + pr_err("(fmdrv): irq : failed to start af switch, "
    + "initiating irq recovery process\n");
    + else
    + fmdev->irq_info.stage_index =
    + FM_AF_JUMP_HANDLE_START_AFJUMP_RESP_INDEX;
    +
    + mod_timer(&fmdev->irq_info.int_timeout_timer, jiffies +
    + FM_DRV_TX_TIMEOUT);
    +}
    +
    +static void fm_irq_handle_start_afjump_resp(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + struct sk_buff *skb;
    + int ret;
    +
    + fmdev = arg;
    +
    + ret = __check_cmdresp_status(fmdev, &skb);
    + if (ret < 0)
    + return;
    +
    + fmdev->irq_info.stage_index = FM_SEND_FLAG_GETCMD_INDEX;
    + set_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag);
    + clear_bit(FM_INTTASK_RUNNING, &fmdev->flag);
    +}
    +
    +static void fm_irq_afjump_rd_freq(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + unsigned short payload;
    + int ret;
    +
    + fmdev = arg;
    + ret = __fm_send_cmd(fmdev, FREQ_SET, REG_RD, NULL,
    + sizeof(payload), NULL);
    + if (ret < 0)
    + pr_err("(fmdrv): irq: failed to read cur freq, "
    + "initiating irq recovery process\n");
    + else
    + fmdev->irq_info.stage_index = FM_AF_JUMP_RD_FREQ_RESP_INDEX;
    +
    + /* Start timer to track timeout */
    + mod_timer(&fmdev->irq_info.int_timeout_timer, jiffies +
    + FM_DRV_TX_TIMEOUT);
    +}
    +
    +static void fm_irq_afjump_rd_freq_resp(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + struct sk_buff *skb;
    + unsigned short read_freq;
    + unsigned int curr_freq, jumped_freq;
    + int ret;
    +
    + fmdev = arg;
    +
    + ret = __check_cmdresp_status(fmdev, &skb);
    + if (ret < 0)
    + return;
    +
    + /* Skip header info and copy only response data */
    + skb_pull(skb, sizeof(struct fm_event_msg_hdr));
    + memcpy(&read_freq, skb->data, sizeof(read_freq));
    + read_freq = be16_to_cpu(read_freq);
    + curr_freq = fmdev->rx.region.bottom_frequency +
    + ((unsigned int)read_freq * FM_FREQ_MUL);
    +
    + jumped_freq =
    + fmdev->rx.cur_station_info.af_cache[fmdev->rx.cur_afjump_index];
    +
    + /* If the frequency was changed the jump succeeded */
    + if ((curr_freq != fmdev->rx.freq_before_jump) &&
    + (curr_freq == jumped_freq)) {
    + pr_debug("(fmdrv): Successfully switched to alternate"
    + "frequency %d\n", curr_freq);
    + fmdev->rx.curr_freq = curr_freq;
    + fm_rx_reset_rds_cache(fmdev);
    +
    + /* AF feature is on, enable low level RSSI interrupt */
    + if (fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON)
    + fmdev->irq_info.mask |= FM_LEV_EVENT;
    +
    + fmdev->irq_info.stage_index = FM_LOW_RSSI_FINISH_INDEX;
    + } else { /* jump to the next freq in the AF list */
    + fmdev->rx.cur_afjump_index++;
    +
    + /* If we reached the end of the list - stop searching */
    + if (fmdev->rx.cur_afjump_index >=
    + fmdev->rx.cur_station_info.no_of_items_in_afcache) {
    + pr_debug("(fmdrv): AF switch processing failed\n");
    + fmdev->irq_info.stage_index = FM_LOW_RSSI_FINISH_INDEX;
    + } else { /* AF List is not over - try next one */
    +
    + pr_debug("(fmdrv): Trying next freq in AF cache\n");
    + fmdev->irq_info.stage_index = FM_AF_JUMP_SETPI_INDEX;
    + }
    + }
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +static void fm_irq_handle_low_rssi_finish(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    +
    + fmdev = arg;
    + /* Continue next function in interrupt handler table */
    + fmdev->irq_info.stage_index = FM_SEND_INTMSK_CMD_INDEX;
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index](fmdev);
    +}
    +
    +static void fm_irq_send_intmsk_cmd(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + unsigned short payload;
    + int ret;
    +
    + fmdev = arg;
    +
    + /* Re-enable FM interrupts */
    + payload = fmdev->irq_info.mask;
    + ret = __fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
    + sizeof(payload), NULL);
    + if (ret)
    + pr_err("(fmdrv): irq: failed to send int_mask_set cmd, "
    + "initiating irq recovery process\n");
    + else
    + fmdev->irq_info.stage_index = FM_HANDLE_INTMSK_CMD_RESP_INDEX;
    +
    + /* Start timer to track timeout */
    + mod_timer(&fmdev->irq_info.int_timeout_timer, jiffies +
    + FM_DRV_TX_TIMEOUT);
    +}
    +
    +static void fm_irq_handle_intmsk_cmd_resp(void *arg)
    +{
    + struct fmdrv_ops *fmdev;
    + struct sk_buff *skb;
    + int ret;
    +
    + fmdev = arg;
    +
    + ret = __check_cmdresp_status(fmdev, &skb);
    + if (ret < 0)
    + return;
    + /*
    + * This is last function in interrupt table to be executed.
    + * So, reset stage index to 0.
    + */
    + fmdev->irq_info.stage_index = FM_SEND_FLAG_GETCMD_INDEX;
    +
    + /* Start processing any pending interrupt */
    + if (test_and_clear_bit(FM_INTTASK_SCHEDULE_PENDING, &fmdev->flag)) {
    + fmdev->irq_info.fm_int_handlers[fmdev->irq_info.stage_index]
    + (fmdev);
    + } else
    + clear_bit(FM_INTTASK_RUNNING, &fmdev->flag);
    +}
    +
    +/* Returns availability of RDS data in internel buffer */
    +int fmc_is_rds_data_available(struct fmdrv_ops *fmdev, struct file *file,
    + struct poll_table_struct *pts)
    +{
    + poll_wait(file, &fmdev->rx.rds.read_queue, pts);
    + if (fmdev->rx.rds.rd_index != fmdev->rx.rds.wr_index)
    + return 0;
    +
    + return -EAGAIN;
    +}
    +
    +/* Copies RDS data from internal buffer to user buffer */
    +int fmc_transfer_rds_from_internal_buff(struct fmdrv_ops *fmdev,
    + struct file *file,
    + char __user *buf, size_t count)
    +{
    + unsigned int block_count;
    + unsigned long flags;
    + int ret;
    +
    + if (fmdev->rx.rds.wr_index == fmdev->rx.rds.rd_index) {
    + if (file->f_flags & O_NONBLOCK)
    + return -EWOULDBLOCK;
    +
    + ret = wait_event_interruptible(fmdev->rx.rds.read_queue,
    + (fmdev->rx.rds.wr_index !=
    + fmdev->rx.rds.rd_index));
    + if (ret)
    + return -EINTR;
    + }
    +
    + /* Calculate block count from byte count */
    + count /= 3;
    + block_count = 0;
    + ret = 0;
    +
    + spin_lock_irqsave(&fmdev->rds_buff_lock, flags);
    +
    + while (block_count < count) {
    + if (fmdev->rx.rds.wr_index == fmdev->rx.rds.rd_index)
    + break;
    +
    + if (copy_to_user
    + (buf, &fmdev->rx.rds.buffer[fmdev->rx.rds.rd_index],
    + FM_RDS_BLOCK_SIZE))
    + break;
    +
    + fmdev->rx.rds.rd_index += FM_RDS_BLOCK_SIZE;
    + if (fmdev->rx.rds.rd_index >= fmdev->rx.rds.buf_size)
    + fmdev->rx.rds.rd_index = 0;
    +
    + block_count++;
    + buf += FM_RDS_BLOCK_SIZE;
    + ret += FM_RDS_BLOCK_SIZE;
    + }
    + spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags);
    + return ret;
    +}
    +
    +int fmc_set_frequency(struct fmdrv_ops *fmdev, unsigned int freq_to_set)
    +{
    + int ret;
    +
    + switch (fmdev->curr_fmmode) {
    + case FM_MODE_RX:
    + ret = fm_rx_set_frequency(fmdev, freq_to_set);
    + break;
    +
    + case FM_MODE_TX:
    + ret = fm_tx_set_frequency(fmdev, freq_to_set);
    + break;
    +
    + default:
    + ret = -EINVAL;
    + }
    + return ret;
    +}
    +
    +int fmc_get_frequency(struct fmdrv_ops *fmdev, unsigned int *cur_tuned_frq)
    +{
    + int ret = 0;
    +
    + if (fmdev->rx.curr_freq == FM_UNDEFINED_FREQ) {
    + pr_err("(fmdrv): RX frequency is not set\n");
    + return -EPERM;
    + }
    + if (cur_tuned_frq == NULL) {
    + pr_err("(fmdrv): Invalid memory\n");
    + return -ENOMEM;
    + }
    +
    + switch (fmdev->curr_fmmode) {
    + case FM_MODE_RX:
    + *cur_tuned_frq = fmdev->rx.curr_freq;
    + break;
    +
    + case FM_MODE_TX:
    + *cur_tuned_frq = 0; /* TODO : Change this later */
    + break;
    +
    + default:
    + ret = -EINVAL;
    + }
    +
    + return ret;
    +}
    +
    +int fmc_set_region(struct fmdrv_ops *fmdev, unsigned char region_to_set)
    +{
    + int ret;
    +
    + switch (fmdev->curr_fmmode) {
    + case FM_MODE_RX:
    + ret = fm_rx_set_region(fmdev, region_to_set);
    + break;
    +
    + case FM_MODE_TX:
    + ret = fm_tx_set_region(fmdev, region_to_set);
    + break;
    +
    + default:
    + ret = -EINVAL;
    + }
    + return ret;
    +}
    +
    +int fmc_set_mute_mode(struct fmdrv_ops *fmdev, unsigned char mute_mode_toset)
    +{
    + int ret;
    +
    + switch (fmdev->curr_fmmode) {
    + case FM_MODE_RX:
    + ret = fm_rx_set_mute_mode(fmdev, mute_mode_toset);
    + break;
    +
    + case FM_MODE_TX:
    + ret = fm_tx_set_mute_mode(fmdev, mute_mode_toset);
    + break;
    +
    + default:
    + ret = -EINVAL;
    + }
    + return ret;
    +}
    +
    +int fmc_set_stereo_mono(struct fmdrv_ops *fmdev, unsigned short mode)
    +{
    + int ret;
    +
    + switch (fmdev->curr_fmmode) {
    + case FM_MODE_RX:
    + ret = fm_rx_set_stereo_mono(fmdev, mode);
    + break;
    +
    + case FM_MODE_TX:
    + ret = fm_tx_set_stereo_mono(fmdev, mode);
    + break;
    +
    + default:
    + ret = -EINVAL;
    + }
    + return ret;
    +}
    +
    +int fmc_set_rds_mode(struct fmdrv_ops *fmdev, unsigned char rds_en_dis)
    +{
    + int ret;
    +
    + switch (fmdev->curr_fmmode) {
    + case FM_MODE_RX:
    + ret = fm_rx_set_rds_mode(fmdev, rds_en_dis);
    + break;
    +
    + case FM_MODE_TX:
    + ret = fm_tx_set_rds_mode(fmdev, rds_en_dis);
    + break;
    +
    + default:
    + ret = -EINVAL;
    + }
    + return ret;
    +}
    +
    +/* Sends power off command to the chip */
    +static int fm_power_down(struct fmdrv_ops *fmdev)
    +{
    + unsigned short payload;
    + int ret = 0;
    +
    + if (!test_bit(FM_CORE_READY, &fmdev->flag)) {
    + pr_err("(fmdrv): FM core is not ready\n");
    + return -EPERM;
    + }
    + if (fmdev->curr_fmmode == FM_MODE_OFF) {
    + pr_debug("(fmdrv): FM chip is already in OFF state\n");
    + return ret;
    + }
    +
    + payload = 0x0;
    + ret = fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload,
    + sizeof(payload), NULL, NULL);
    + if (ret < 0)
    + return ret;
    +
    + ret = fmc_release(fmdev);
    + if (ret < 0)
    + pr_err("(fmdrv): FM CORE release failed\n");
    +
    + return ret;
    +}
    +
    +/* Reads init command from FM firmware file and loads to the chip */
    +static int fm_download_firmware(struct fmdrv_ops *fmdev,
    + const char *firmware_name)
    +{
    + const struct firmware *fw_entry;
    + struct bts_header *fw_header;
    + struct bts_action *action;
    + struct bts_action_delay *delay;
    + char *fw_data;
    + int ret, fw_len, cmd_cnt;
    +
    + cmd_cnt = 0;
    + set_bit(FM_FIRMWARE_DW_INPROGRESS, &fmdev->flag);
    +
    + ret = request_firmware(&fw_entry, firmware_name,
    + &fmdev->radio_dev->dev);
    + if (ret < 0) {
    + pr_err("(fmdrv): Unable to read firmware(%s) content\n",
    + firmware_name);
    + return ret;
    + }
    + pr_debug("(fmdrv): Firmware(%s) length : %d bytes\n", firmware_name,
    + fw_entry->size);
    +
    + fw_data = (void *)fw_entry->data;
    + fw_len = fw_entry->size;
    +
    + fw_header = (struct bts_header *)fw_data;
    + if (fw_header->magic != FM_FW_FILE_HEADER_MAGIC) {
    + pr_err("(fmdrv): %s not a legal TI firmware file\n",
    + firmware_name);
    + ret = -EINVAL;
    + goto rel_fw;
    + }
    + pr_debug("(fmdrv): Firmware(%s) magic number : 0x%x\n", firmware_name,
    + fw_header->magic);
    +
    + /* Skip file header info , we already verified it */
    + fw_data += sizeof(struct bts_header);
    + fw_len -= sizeof(struct bts_header);
    +
    + while (fw_data && fw_len > 0) {
    + action = (struct bts_action *)fw_data;
    +
    + switch (action->type) {
    + case ACTION_SEND_COMMAND: /* Send */
    + ret = fmc_send_cmd(fmdev, 0, 0, action->data,
    + action->size, NULL, NULL);
    + if (ret < 0)
    + goto rel_fw;
    +
    + cmd_cnt++;
    + break;
    +
    + case ACTION_DELAY: /* Delay */
    + delay = (struct bts_action_delay *)action->data;
    + mdelay(delay->msec);
    + break;
    + }
    +
    + fw_data += (sizeof(struct bts_action) + (action->size));
    + fw_len -= (sizeof(struct bts_action) + (action->size));
    + }
    + pr_debug("(fmdrv): Firmare commands(%d) loaded to chip\n", cmd_cnt);
    +rel_fw:
    + release_firmware(fw_entry);
    + clear_bit(FM_FIRMWARE_DW_INPROGRESS, &fmdev->flag);
    +
    + return ret;
    +}
    +
    +/* Loads default RX configuration to the chip */
    +static int __load_default_rx_configuration(struct fmdrv_ops *fmdev)
    +{
    + int ret;
    +
    + ret = fm_rx_set_volume(fmdev, FM_DEFAULT_RX_VOLUME);
    + if (ret < 0)
    + return ret;
    +
    + ret = fm_rx_set_rssi_threshold(fmdev, FM_DEFAULT_RSSI_THRESHOLD);
    + return ret;
    +}
    +
    +/* Does FM power on sequence */
    +static int fm_power_up(struct fmdrv_ops *fmdev, unsigned char fw_option)
    +{
    + unsigned short payload, asic_id, asic_ver;
    + int resp_len, ret;
    + char fw_name[50];
    +
    + if (fw_option >= FM_MODE_ENTRY_MAX) {
    + pr_err("(fmdrv): Invalid firmware download option\n");
    + return -EINVAL;
    + }
    +
    + /*
    + * Initialize FM common module. FM GPIO toggling is
    + * taken care in Shared Transport driver.
    + */
    + ret = fmc_prepare(fmdev);
    + if (ret < 0) {
    + pr_err("(fmdrv): Unable to prepare FM Common\n");
    + return ret;
    + }
    +
    + payload = FM_ENABLE;
    + ret = fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload,
    + sizeof(payload), NULL, NULL);
    + if (ret < 0)
    + goto rel;
    +
    + /* Allow the chip to settle down in Channel-8 mode */
    + msleep(20);
    +
    + ret = fmc_send_cmd(fmdev, ASIC_ID_GET, REG_RD, NULL,
    + sizeof(asic_id), &asic_id, &resp_len);
    + if (ret < 0)
    + goto rel;
    +
    + ret = fmc_send_cmd(fmdev, ASIC_VER_GET, REG_RD, NULL,
    + sizeof(asic_ver), &asic_ver, &resp_len);
    + if (ret < 0)
    + goto rel;
    +
    + pr_debug("(fmdrv): ASIC ID: 0x%x , ASIC Version: %d\n",
    + be16_to_cpu(asic_id), be16_to_cpu(asic_ver));
    +
    + sprintf(fw_name, "%s_%x.%d.bts", FM_FMC_FW_FILE_START,
    + be16_to_cpu(asic_id), be16_to_cpu(asic_ver));
    + ret = fm_download_firmware(fmdev, fw_name);
    + if (ret < 0) {
    + pr_debug("(fmdrv): Failed to download firmware file %s\n",
    + fw_name);
    + goto rel;
    + }
    +
    + sprintf(fw_name, "%s_%x.%d.bts", (fw_option == FM_MODE_RX) ?
    + FM_RX_FW_FILE_START : FM_TX_FW_FILE_START,
    + be16_to_cpu(asic_id), be16_to_cpu(asic_ver));
    + ret = fm_download_firmware(fmdev, fw_name);
    + if (ret < 0) {
    + pr_debug("(fmdrv): Failed to download firmware file %s\n",
    + fw_name);
    + goto rel;
    + } else
    + return ret;
    +rel:
    + fmc_release(fmdev);
    +
    + return ret;
    +}
    +
    +/* Set FM Modes(TX, RX, OFF) */
    +int fmc_set_mode(struct fmdrv_ops *fmdev, unsigned char fm_mode)
    +{
    + int ret = 0;
    +
    + if (fm_mode >= FM_MODE_ENTRY_MAX) {
    + pr_err("(fmdrv): Invalid FM mode\n");
    + return -EINVAL;
    + }
    + if (fmdev->curr_fmmode == fm_mode) {
    + pr_debug("(fmdrv): Already fm is in mode(%d)\n", fm_mode);
    + return ret;
    + }
    +
    + switch (fm_mode) {
    + case FM_MODE_OFF: /* OFF Mode */
    + ret = fm_power_down(fmdev);
    + if (ret < 0) {
    + pr_err("(fmdrv): Failed to set OFF mode\n");
    + return ret;
    + }
    + break;
    +
    + case FM_MODE_TX: /* TX Mode */
    + case FM_MODE_RX: /* RX Mode */
    + /* Power down before switching to TX or RX mode */
    + if (fmdev->curr_fmmode != FM_MODE_OFF) {
    + ret = fm_power_down(fmdev);
    + if (ret < 0) {
    + pr_err("(fmdrv): Failed to set OFF mode\n");
    + return ret;
    + }
    + msleep(30);
    + }
    + ret = fm_power_up(fmdev, fm_mode);
    + if (ret < 0) {
    + pr_err("(fmdrv): Failed to load firmware\n");
    + return ret;
    + }
    + }
    + fmdev->curr_fmmode = fm_mode;
    +
    + /* Set default configuration */
    + if (fmdev->curr_fmmode == FM_MODE_RX) {
    + pr_debug("(fmdrv): Loading default rx configuration..\n");
    + ret = __load_default_rx_configuration(fmdev);
    + if (ret < 0)
    + pr_err("(fmdrv): Failed to load default values\n");
    + }
    +
    + return ret;
    +}
    +
    +/* Returns current FM mode (TX, RX, OFF) */
    +int fmc_get_mode(struct fmdrv_ops *fmdev, unsigned char *fmmode)
    +{
    + if (!test_bit(FM_CORE_READY, &fmdev->flag)) {
    + pr_err("(fmdrv): FM core is not ready\n");
    + return -EPERM;
    + }
    + if (fmmode == NULL) {
    + pr_err("(fmdrv): Invalid memory\n");
    + return -ENOMEM;
    + }
    +
    + *fmmode = fmdev->curr_fmmode;
    + return 0;
    +}
    +
    +/* Called by ST layer when FM packet is available */
    +static long fm_st_receive(void *arg, struct sk_buff *skb)
    +{
    + struct fmdrv_ops *fmdev;
    +
    + fmdev = (struct fmdrv_ops *)arg;
    +
    + if (skb == NULL) {
    + pr_err("(fmdrv): Invalid SKB received from ST\n");
    + return -EFAULT;
    + }
    +
    + if (skb->cb[0] != FM_PKT_LOGICAL_CHAN_NUMBER) {
    + pr_err("(fmdrv): Received SKB (%p) is not FM Channel 8 pkt\n",
    + skb);
    + return -EINVAL;
    + }
    +
    + memcpy(skb_push(skb, 1), &skb->cb[0], 1);
    + skb_queue_tail(&fmdev->rx_q, skb);
    + tasklet_schedule(&fmdev->rx_task);
    +
    + return 0;
    +}
    +
    +/*
    + * Called by ST layer to indicate protocol registration completion
    + * status.
    + */
    +static void fm_st_reg_comp_cb(void *arg, char data)
    +{
    + struct fmdrv_ops *fmdev;
    +
    + fmdev = (struct fmdrv_ops *)arg;
    + fmdev->streg_cbdata = data;
    + complete(&wait_for_fmdrv_reg_comp);
    +}
    +
    +/*
    + * This function will be called from FM V4L2 open function.
    + * Register with ST driver and initialize driver data.
    + */
    +int fmc_prepare(struct fmdrv_ops *fmdev)
    +{
    + static struct st_proto_s fm_st_proto;
    + unsigned long timeleft;
    + int ret = 0;
    +
    + if (test_bit(FM_CORE_READY, &fmdev->flag)) {
    + pr_debug("(fmdrv): FM Core is already up\n");
    + return ret;
    + }
    +
    + memset(&fm_st_proto, 0, sizeof(fm_st_proto));
    + fm_st_proto.type = ST_FM;
    + fm_st_proto.recv = fm_st_receive;
    + fm_st_proto.match_packet = NULL;
    + fm_st_proto.reg_complete_cb = fm_st_reg_comp_cb;
    + fm_st_proto.write = NULL; /* TI ST driver will fill write pointer */
    + fm_st_proto.priv_data = fmdev;
    +
    + ret = st_register(&fm_st_proto);
    + if (ret == -EINPROGRESS) {
    + init_completion(&wait_for_fmdrv_reg_comp);
    + fmdev->streg_cbdata = -EINPROGRESS;
    + pr_debug("(fmdrv): %s waiting for ST reg completion signal\n",
    + __func__);
    +
    + timeleft =
    + wait_for_completion_timeout(&wait_for_fmdrv_reg_comp,
    + FM_ST_REGISTER_TIMEOUT);
    +
    + if (!timeleft) {
    + pr_err("(fmdrv): Timeout(%d sec), didn't get reg "
    + "completion signal from ST\n",
    + jiffies_to_msecs(FM_ST_REGISTER_TIMEOUT) / 1000);
    + return -ETIMEDOUT;
    + }
    + if (fmdev->streg_cbdata != 0) {
    + pr_err("(fmdrv): ST reg comp CB called with error "
    + "status %d\n", fmdev->streg_cbdata);
    + return -EAGAIN;
    + }
    + ret = 0;
    + } else if (ret == -1) {
    + pr_err("(fmdrv): st_register failed %d\n", ret);
    + return -EAGAIN;
    + }
    +
    + if (fm_st_proto.write != NULL) {
    + g_st_write = fm_st_proto.write;
    + } else {
    + pr_err("(fmdrv): Failed to get ST write func pointer\n");
    + ret = st_unregister(ST_FM);
    + if (ret < 0)
    + pr_err("(fmdrv): st_unregister failed %d\n", ret);
    + return -EAGAIN;
    + }
    +
    + spin_lock_init(&fmdev->rds_buff_lock);
    + spin_lock_init(&fmdev->resp_skb_lock);
    +
    + /* Initialize TX queue and TX tasklet */
    + skb_queue_head_init(&fmdev->tx_q);
    + tasklet_init(&fmdev->tx_task, __send_tasklet, (unsigned long)fmdev);
    +
    + /* Initialize RX Queue and RX tasklet */
    + skb_queue_head_init(&fmdev->rx_q);
    + tasklet_init(&fmdev->rx_task, __recv_tasklet, (unsigned long)fmdev);
    +
    + fmdev->irq_info.stage_index = 0;
    + atomic_set(&fmdev->tx_cnt, 1);
    + fmdev->response_completion = NULL;
    +
    + init_timer(&fmdev->irq_info.int_timeout_timer);
    + fmdev->irq_info.int_timeout_timer.function =
    + &__int_timeout_handler;
    + fmdev->irq_info.int_timeout_timer.data = (unsigned long)fmdev;
    + fmdev->irq_info.mask =
    + FM_MAL_EVENT /*| FM_STIC_EVENT <<Enable this later>> */ ;
    +
    + /* Region info */
    + memcpy(&fmdev->rx.region, &region_configs[default_radio_region],
    + sizeof(struct region_info));
    +
    + fmdev->rx.curr_mute_mode = FM_MUTE_OFF;
    + fmdev->rx.curr_rf_depend_mute = FM_RX_RF_DEPENDENT_MUTE_OFF;
    + fmdev->rx.rds.flag = FM_RDS_DISABLE;
    + fmdev->rx.curr_freq = FM_UNDEFINED_FREQ;
    + fmdev->rx.rds_mode = FM_RDS_SYSTEM_RDS;
    + fmdev->rx.af_mode = FM_RX_RDS_AF_SWITCH_MODE_OFF;
    + fmdev->irq_info.irq_service_timeout_retry = 0;
    +
    + fm_rx_reset_rds_cache(fmdev);
    + init_waitqueue_head(&fmdev->rx.rds.read_queue);
    +
    + fm_rx_reset_curr_station_info(fmdev);
    + set_bit(FM_CORE_READY, &fmdev->flag);
    +
    + return ret;
    +}
    +
    +/*
    + * This function will be called from FM V4L2 release function.
    + * Unregister from ST driver.
    + */
    +int fmc_release(struct fmdrv_ops *fmdev)
    +{
    + int ret;
    +
    + if (!test_bit(FM_CORE_READY, &fmdev->flag)) {
    + pr_debug("(fmdrv): FM Core is already down\n");
    + return 0;
    + }
    + /* Sevice pending read */
    + wake_up_interruptible(&fmdev->rx.rds.read_queue);
    +
    + tasklet_kill(&fmdev->tx_task);
    + tasklet_kill(&fmdev->rx_task);
    +
    + skb_queue_purge(&fmdev->tx_q);
    + skb_queue_purge(&fmdev->rx_q);
    +
    + fmdev->response_completion = NULL;
    + fmdev->rx.curr_freq = 0;
    +
    + ret = st_unregister(ST_FM);
    + if (ret < 0)
    + pr_err("(fmdrv): Failed to de-register FM from ST %d\n", ret);
    + else
    + pr_debug("(fmdrv): Successfully unregistered from ST\n");
    +
    + clear_bit(FM_CORE_READY, &fmdev->flag);
    + return ret;
    +}
    +
    +/*
    + * Module init function. Ask FM V4L module to register video device.
    + * Allocate memory for FM driver context and RX RDS buffer.
    + */
    +static int __init fm_drv_init(void)
    +{
    + struct fmdrv_ops *fmdev = NULL;
    + int ret = -ENOMEM;
    +
    + pr_debug("(fmdrv): FM driver version %s\n", FM_DRV_VERSION);
    +
    + fmdev = kzalloc(sizeof(struct fmdrv_ops), GFP_KERNEL);
    + if (NULL == fmdev) {
    + pr_err("(fmdrv): Can't allocate operation structure memory\n");
    + return ret;
    + }
    + fmdev->rx.rds.buf_size = default_rds_buf * FM_RDS_BLOCK_SIZE;
    + fmdev->rx.rds.buffer = kzalloc(fmdev->rx.rds.buf_size, GFP_KERNEL);
    + if (NULL == fmdev->rx.rds.buffer) {
    + pr_err("(fmdrv): Can't allocate rds ring buffer\n");
    + goto rel_dev;
    + }
    +
    + ret = fm_v4l2_init_video_device(fmdev, radio_nr);
    + if (ret < 0)
    + goto rel_rdsbuf;
    +
    + fmdev->irq_info.fm_int_handlers = g_IntHandlerTable;
    + fmdev->curr_fmmode = FM_MODE_OFF;
    + fmdev->tx_data.pwr_lvl = FM_PWR_LVL_DEF;
    + fmdev->tx_data.preemph = FM_TX_PREEMPH_50US;
    + return ret;
    +
    +rel_rdsbuf:
    + kfree(fmdev->rx.rds.buffer);
    +rel_dev:
    + kfree(fmdev);
    +
    + return ret;
    +}
    +
    +/* Module exit function. Ask FM V4L module to unregister video device */
    +static void __exit fm_drv_exit(void)
    +{
    + struct fmdrv_ops *fmdev = NULL;
    +
    + fmdev = fm_v4l2_deinit_video_device();
    + if (fmdev != NULL) {
    + kfree(fmdev->rx.rds.buffer);
    + kfree(fmdev);
    + }
    +}
    +
    +module_init(fm_drv_init);
    +module_exit(fm_drv_exit);
    +
    +/* ------------- Module Info ------------- */
    +MODULE_AUTHOR("Raja Mani <raja_mani@ti.com>");
    +MODULE_DESCRIPTION("FM Driver for Connectivity chip of Texas Instruments. "
    + FM_DRV_VERSION);
    +MODULE_VERSION(FM_DRV_VERSION);
    +MODULE_LICENSE("GPL");
    diff --git a/drivers/media/radio/wl128x/fmdrv_common.h b/drivers/media/radio/wl128x/fmdrv_common.h
    new file mode 100644
    index 0000000..d76550d
    --- /dev/null
    +++ b/drivers/media/radio/wl128x/fmdrv_common.h
    @@ -0,0 +1,402 @@
    +/*
    + * FM Driver for Connectivity chip of Texas Instruments.
    + * FM Common module header file
    + *
    + * Copyright (C) 2010 Texas Instruments
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License version 2 as
    + * published by the Free Software Foundation.
    + *
    + * This program is distributed in the hope that it will be useful,
    + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    + * GNU General Public License for more details.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program; if not, write to the Free Software
    + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    + *
    + */
    +
    +#ifndef _FMDRV_COMMON_H
    +#define _FMDRV_COMMON_H
    +
    +#define FM_ST_REGISTER_TIMEOUT msecs_to_jiffies(6000) /* 6 sec */
    +#define FM_PKT_LOGICAL_CHAN_NUMBER 0x08 /* Logical channel 8 */
    +
    +#define REG_RD 0x1
    +#define REG_WR 0x0
    +
    +struct fm_reg_table {
    + unsigned char opcode;
    + unsigned char type;
    + char *name;
    +};
    +
    +#define STEREO_GET 0
    +#define RSSI_LVL_GET 1
    +#define IF_COUNT_GET 2
    +#define FLAG_GET 3
    +#define RDS_SYNC_GET 4
    +#define RDS_DATA_GET 5
    +#define FREQ_SET 10
    +#define AF_FREQ_SET 11
    +#define MOST_MODE_SET 12
    +#define MOST_BLEND_SET 13
    +#define DEMPH_MODE_SET 14
    +#define SEARCH_LVL_SET 15
    +#define BAND_SET 16
    +#define MUTE_STATUS_SET 17
    +#define RDS_PAUSE_LVL_SET 18
    +#define RDS_PAUSE_DUR_SET 19
    +#define RDS_MEM_SET 20
    +#define RDS_BLK_B_SET 21
    +#define RDS_MSK_B_SET 22
    +#define RDS_PI_MASK_SET 23
    +#define RDS_PI_SET 24
    +#define RDS_SYSTEM_SET 25
    +#define INT_MASK_SET 26
    +#define SEARCH_DIR_SET 27
    +#define VOLUME_SET 28
    +#define AUDIO_ENABLE_SET 29
    +#define PCM_MODE_SET 30
    +#define I2S_MODE_CONFIG_SET 31
    +#define POWER_SET 32
    +#define INTX_CONFIG_SET 33
    +#define PULL_EN_SET 34
    +#define HILO_SET 35
    +#define SWITCH2FREF 36
    +#define FREQ_DRIFT_REPORT 37
    +
    +#define PCE_GET 40
    +#define FIRM_VER_GET 41
    +#define ASIC_VER_GET 42
    +#define ASIC_ID_GET 43
    +#define MAN_ID_GET 44
    +#define TUNER_MODE_SET 45
    +#define STOP_SEARCH 46
    +#define RDS_CNTRL_SET 47
    +
    +#define WRITE_HARDWARE_REG 100
    +#define CODE_DOWNLOAD 101
    +#define RESET 102
    +
    +#define FM_POWER_MODE 254
    +#define FM_INTERRUPT 255
    +
    +/* Transmitter API */
    +
    +#define CHANL_SET 55
    +#define CHANL_BW_SET 56
    +#define REF_SET 57
    +#define POWER_ENB_SET 90
    +#define POWER_ATT_SET 58
    +#define POWER_LEV_SET 59
    +#define AUDIO_DEV_SET 60
    +#define PILOT_DEV_SET 61
    +#define RDS_DEV_SET 62
    +#define TX_BAND_SET 65
    +#define PUPD_SET 91
    +#define AUDIO_IO_SET 63
    +#define PREMPH_SET 64
    +#define MONO_SET 66
    +#define MUTE 92
    +#define MPX_LMT_ENABLE 67
    +#define PI_SET 93
    +#define ECC_SET 69
    +#define PTY 70
    +#define AF 71
    +#define DISPLAY_MODE 74
    +#define RDS_REP_SET 77
    +#define RDS_CONFIG_DATA_SET 98
    +#define RDS_DATA_SET 99
    +#define RDS_DATA_ENB 94
    +#define TA_SET 78
    +#define TP_SET 79
    +#define DI_SET 80
    +#define MS_SET 81
    +#define PS_SCROLL_SPEED 82
    +#define TX_AUDIO_LEVEL_TEST 96
    +#define TX_AUDIO_LEVEL_TEST_THRESHOLD 73
    +#define TX_AUDIO_INPUT_LEVEL_RANGE_SET 54
    +#define RX_ANTENNA_SELECT 87
    +#define I2C_DEV_ADDR_SET 86
    +#define REF_ERR_CALIB_PARAM_SET 88
    +#define REF_ERR_CALIB_PERIODICITY_SET 89
    +#define SOC_INT_TRIGGER 52
    +#define SOC_AUDIO_PATH_SET 83
    +#define SOC_PCMI_OVERRIDE 84
    +#define SOC_I2S_OVERRIDE 85
    +#define RSSI_BLOCK_SCAN_FREQ_SET 95
    +#define RSSI_BLOCK_SCAN_START 97
    +#define RSSI_BLOCK_SCAN_DATA_GET 5
    +#define READ_FMANT_TUNE_VALUE 104
    +
    +/* SKB helpers */
    +struct fm_skb_cb {
    + __u8 fm_opcode;
    + struct completion *completion;
    +};
    +
    +#define fm_cb(skb) ((struct fm_skb_cb *)(skb->cb))
    +
    +/* FM Channel-8 command message format */
    +struct fm_cmd_msg_hdr {
    + __u8 header; /* Logical Channel-8 */
    + __u8 len; /* Number of bytes follows */
    + __u8 fm_opcode; /* FM Opcode */
    + __u8 rd_wr; /* Read/Write command */
    + __u8 dlen; /* Length of payload */
    +} __attribute__ ((packed));
    +
    +#define FM_CMD_MSG_HDR_SIZE 5 /* sizeof(struct fm_cmd_msg_hdr) */
    +
    +/* FM Channel-8 event messgage format */
    +struct fm_event_msg_hdr {
    + __u8 header; /* Logical Channel-8 */
    + __u8 len; /* Number of bytes follows */
    + __u8 status; /* Event status */
    + __u8 num_fm_hci_cmds; /* Number of pkts the host allowed to send */
    + __u8 fm_opcode; /* FM Opcode */
    + __u8 rd_wr; /* Read/Write command */
    + __u8 dlen; /* Length of payload */
    +} __attribute__ ((packed));
    +
    +#define FM_EVT_MSG_HDR_SIZE 7 /* sizeof(struct fm_event_msg_hdr) */
    +
    +/* TI's magic number in firmware file */
    +#define FM_FW_FILE_HEADER_MAGIC 0x42535442
    +
    +#define FM_ENABLE 1
    +#define FM_DISABLE 0
    +
    +/* FLAG_GET register bits */
    +#define FM_FR_EVENT (1 << 0)
    +#define FM_BL_EVENT (1 << 1)
    +#define FM_RDS_EVENT (1 << 2)
    +#define FM_BBLK_EVENT (1 << 3)
    +#define FM_LSYNC_EVENT (1 << 4)
    +#define FM_LEV_EVENT (1 << 5)
    +#define FM_IFFR_EVENT (1 << 6)
    +#define FM_PI_EVENT (1 << 7)
    +#define FM_PD_EVENT (1 << 8)
    +#define FM_STIC_EVENT (1 << 9)
    +#define FM_MAL_EVENT (1 << 10)
    +#define FM_POW_ENB_EVENT (1 << 11)
    +
    +/*
    + * Firmware files of FM. ASIC ID and ASIC version will be appened to this,
    + * later.
    + */
    +#define FM_FMC_FW_FILE_START ("fmc_ch8")
    +#define FM_RX_FW_FILE_START ("fm_rx_ch8")
    +#define FM_TX_FW_FILE_START ("fm_tx_ch8")
    +
    +#define FM_UNDEFINED_FREQ 0xFFFFFFFF
    +
    +/* Band types */
    +#define FM_BAND_EUROPE_US 0
    +#define FM_BAND_JAPAN 1
    +
    +/* Seek directions */
    +#define FM_SEARCH_DIRECTION_DOWN 0
    +#define FM_SEARCH_DIRECTION_UP 1
    +
    +/* Tunner modes */
    +#define FM_TUNER_STOP_SEARCH_MODE 0
    +#define FM_TUNER_PRESET_MODE 1
    +#define FM_TUNER_AUTONOMOUS_SEARCH_MODE 2
    +#define FM_TUNER_AF_JUMP_MODE 3
    +
    +/* Min and Max volume */
    +#define FM_RX_VOLUME_MIN 0
    +#define FM_RX_VOLUME_MAX 70
    +
    +/* Volume gain step */
    +#define FM_RX_VOLUME_GAIN_STEP 0x370
    +
    +/* Mute modes */
    +#define FM_MUTE_OFF 0
    +#define FM_MUTE_ON 1
    +#define FM_MUTE_ATTENUATE 2
    +
    +#define FM_RX_MUTE_UNMUTE_MODE 0x00
    +#define FM_RX_MUTE_RF_DEP_MODE 0x01
    +#define FM_RX_MUTE_AC_MUTE_MODE 0x02
    +#define FM_RX_MUTE_HARD_MUTE_LEFT_MODE 0x04
    +#define FM_RX_MUTE_HARD_MUTE_RIGHT_MODE 0x08
    +#define FM_RX_MUTE_SOFT_MUTE_FORCE_MODE 0x10
    +
    +/* RF dependent mute mode */
    +#define FM_RX_RF_DEPENDENT_MUTE_ON 1
    +#define FM_RX_RF_DEPENDENT_MUTE_OFF 0
    +
    +/* RSSI threshold min and max */
    +#define FM_RX_RSSI_THRESHOLD_MIN -128
    +#define FM_RX_RSSI_THRESHOLD_MAX 127
    +
    +/* Stereo/Mono mode */
    +#define FM_STEREO_MODE 0
    +#define FM_MONO_MODE 1
    +#define FM_STEREO_SOFT_BLEND 1
    +
    +/* FM RX De-emphasis filter modes */
    +#define FM_RX_EMPHASIS_FILTER_50_USEC 0
    +#define FM_RX_EMPHASIS_FILTER_75_USEC 1
    +
    +/* FM RDS modes */
    +#define FM_RDS_DISABLE 0
    +#define FM_RDS_ENABLE 1
    +
    +#define FM_NO_PI_CODE 0
    +
    +/* FM and RX RDS block enable/disable */
    +#define FM_RX_POWER_SET_FM_ON_RDS_OFF 0x1
    +#define FM_RX_POWET_SET_FM_AND_RDS_BLK_ON 0x3
    +#define FM_RX_POWET_SET_FM_AND_RDS_BLK_OFF 0x0
    +
    +/* RX RDS */
    +#define FM_RX_RDS_FLUSH_FIFO 0x1
    +#define FM_RX_RDS_FIFO_THRESHOLD 64 /* tuples */
    +#define FM_RDS_BLOCK_SIZE 3 /* 3 bytes */
    +
    +/* RDS block types */
    +#define FM_RDS_BLOCK_A 0
    +#define FM_RDS_BLOCK_B 1
    +#define FM_RDS_BLOCK_C 2
    +#define FM_RDS_BLOCK_Ctag 3
    +#define FM_RDS_BLOCK_D 4
    +#define FM_RDS_BLOCK_E 5
    +
    +#define FM_RDS_BLOCK_INDEX_A 0
    +#define FM_RDS_BLOCK_INDEX_B 1
    +#define FM_RDS_BLOCK_INDEX_C 2
    +#define FM_RDS_BLOCK_INDEX_D 3
    +#define FM_RDS_BLOCK_INDEX_UNKNOWN 0xF0
    +
    +#define FM_RDS_STATUS_ERROR_MASK 0x18
    +
    +/*
    + * Represents an RDS group type & version.
    + * There are 15 groups, each group has 2 versions: A and B.
    + */
    +#define FM_RDS_GROUP_TYPE_MASK_0A ((unsigned long)1<<0)
    +#define FM_RDS_GROUP_TYPE_MASK_0B ((unsigned long)1<<1)
    +#define FM_RDS_GROUP_TYPE_MASK_1A ((unsigned long)1<<2)
    +#define FM_RDS_GROUP_TYPE_MASK_1B ((unsigned long)1<<3)
    +#define FM_RDS_GROUP_TYPE_MASK_2A ((unsigned long)1<<4)
    +#define FM_RDS_GROUP_TYPE_MASK_2B ((unsigned long)1<<5)
    +#define FM_RDS_GROUP_TYPE_MASK_3A ((unsigned long)1<<6)
    +#define FM_RDS_GROUP_TYPE_MASK_3B ((unsigned long)1<<7)
    +#define FM_RDS_GROUP_TYPE_MASK_4A ((unsigned long)1<<8)
    +#define FM_RDS_GROUP_TYPE_MASK_4B ((unsigned long)1<<9)
    +#define FM_RDS_GROUP_TYPE_MASK_5A ((unsigned long)1<<10)
    +#define FM_RDS_GROUP_TYPE_MASK_5B ((unsigned long)1<<11)
    +#define FM_RDS_GROUP_TYPE_MASK_6A ((unsigned long)1<<12)
    +#define FM_RDS_GROUP_TYPE_MASK_6B ((unsigned long)1<<13)
    +#define FM_RDS_GROUP_TYPE_MASK_7A ((unsigned long)1<<14)
    +#define FM_RDS_GROUP_TYPE_MASK_7B ((unsigned long)1<<15)
    +#define FM_RDS_GROUP_TYPE_MASK_8A ((unsigned long)1<<16)
    +#define FM_RDS_GROUP_TYPE_MASK_8B ((unsigned long)1<<17)
    +#define FM_RDS_GROUP_TYPE_MASK_9A ((unsigned long)1<<18)
    +#define FM_RDS_GROUP_TYPE_MASK_9B ((unsigned long)1<<19)
    +#define FM_RDS_GROUP_TYPE_MASK_10A ((unsigned long)1<<20)
    +#define FM_RDS_GROUP_TYPE_MASK_10B ((unsigned long)1<<21)
    +#define FM_RDS_GROUP_TYPE_MASK_11A ((unsigned long)1<<22)
    +#define FM_RDS_GROUP_TYPE_MASK_11B ((unsigned long)1<<23)
    +#define FM_RDS_GROUP_TYPE_MASK_12A ((unsigned long)1<<24)
    +#define FM_RDS_GROUP_TYPE_MASK_12B ((unsigned long)1<<25)
    +#define FM_RDS_GROUP_TYPE_MASK_13A ((unsigned long)1<<26)
    +#define FM_RDS_GROUP_TYPE_MASK_13B ((unsigned long)1<<27)
    +#define FM_RDS_GROUP_TYPE_MASK_14A ((unsigned long)1<<28)
    +#define FM_RDS_GROUP_TYPE_MASK_14B ((unsigned long)1<<29)
    +#define FM_RDS_GROUP_TYPE_MASK_15A ((unsigned long)1<<30)
    +#define FM_RDS_GROUP_TYPE_MASK_15B ((unsigned long)1<<31)
    +
    +/* RX Alternate Frequency info */
    +#define FM_RDS_MIN_AF 1
    +#define FM_RDS_MAX_AF 204
    +#define FM_RDS_MAX_AF_JAPAN 140
    +#define FM_RDS_1_AF_FOLLOWS 225
    +#define FM_RDS_25_AF_FOLLOWS 249
    +
    +/* RDS system type (RDS/RBDS) */
    +#define FM_RDS_SYSTEM_RDS 0
    +#define FM_RDS_SYSTEM_RBDS 1
    +
    +/* AF on/off */
    +#define FM_RX_RDS_AF_SWITCH_MODE_ON 1
    +#define FM_RX_RDS_AF_SWITCH_MODE_OFF 0
    +
    +/* Retry count when interrupt process goes wrong */
    +#define FM_IRQ_TIMEOUT_RETRY_MAX 5 /* 5 times */
    +
    +/* Audio IO set values */
    +#define FM_RX_FM_AUDIO_ENABLE_I2S 0x01
    +#define FM_RX_FM_AUDIO_ENABLE_ANALOG 0x02
    +#define FM_RX_FM_AUDIO_ENABLE_I2S_AND_ANALOG 0x03
    +#define FM_RX_FM_AUDIO_ENABLE_DISABLE 0x00
    +
    +/* HI/LO set values */
    +#define FM_RX_IFFREQ_TO_HI_SIDE 0x0
    +#define FM_RX_IFFREQ_TO_LO_SIDE 0x1
    +#define FM_RX_IFFREQ_HILO_AUTOMATIC 0x2
    +
    +/*
    + * Default RX mode configuration. Chip will be configured
    + * with this default values after loading RX firmware.
    + */
    +#define FM_DEFAULT_RX_VOLUME 10
    +#define FM_DEFAULT_RSSI_THRESHOLD 3
    +
    +/* Range for TX power level in units for dB/uV */
    +#define FM_PWR_LVL_LOW 91
    +#define FM_PWR_LVL_HIGH 122
    +
    +/* Chip specific default TX power level value */
    +#define FM_PWR_LVL_DEF 4
    +
    +/* FM TX Pre-emphasis filter values */
    +#define FM_TX_PREEMPH_OFF 1
    +#define FM_TX_PREEMPH_50US 0
    +#define FM_TX_PREEMPH_75US 2
    +
    +/* FM TX antenna impedence values */
    +#define FM_TX_ANT_IMP_50 0
    +#define FM_TX_ANT_IMP_200 1
    +#define FM_TX_ANT_IMP_500 2
    +
    +/* Functions exported by FM common sub-module */
    +int fmc_prepare(struct fmdrv_ops *);
    +int fmc_release(struct fmdrv_ops *);
    +
    +void fmc_update_region_info(struct fmdrv_ops *, unsigned char);
    +int fmc_send_cmd(struct fmdrv_ops *, unsigned char, unsigned short int,
    + void *, int, void *, int *);
    +int fmc_is_rds_data_available(struct fmdrv_ops *, struct file *,
    + struct poll_table_struct *);
    +int fmc_transfer_rds_from_internal_buff(struct fmdrv_ops *, struct file *,
    + char __user *, size_t);
    +
    +int fmc_set_frequency(struct fmdrv_ops *, unsigned int);
    +int fmc_set_mode(struct fmdrv_ops *, unsigned char);
    +int fmc_set_region(struct fmdrv_ops *, unsigned char);
    +int fmc_set_mute_mode(struct fmdrv_ops *, unsigned char);
    +int fmc_set_stereo_mono(struct fmdrv_ops *, unsigned short);
    +int fmc_set_rds_mode(struct fmdrv_ops *, unsigned char);
    +
    +int fmc_get_frequency(struct fmdrv_ops *, unsigned int *);
    +int fmc_get_region(struct fmdrv_ops *, unsigned char *);
    +int fmc_get_mode(struct fmdrv_ops *, unsigned char *);
    +
    +/*
    + * channel spacing
    + */
    +#define FM_CHANNEL_SPACING_50KHZ 1
    +#define FM_CHANNEL_SPACING_100KHZ 2
    +#define FM_CHANNEL_SPACING_200KHZ 4
    +#define FM_FREQ_MUL 50
    +
    +#endif
    +
    --
    1.5.6.3


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      Last update: 2010-12-17 11:47    [W:0.154 / U:33.808 seconds]
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