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Message-Id: <1292583996-4440-4-git-send-email-manjunatha_halli@ti.com>
Date: Fri, 17 Dec 2010 06:06:32 -0500
From: manjunatha_halli@...com
To: mchehab@...radead.org, hverkuil@...all.nl
Cc: linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
Manjunatha Halli <manjunatha_halli@...com>
Subject: [PATCH v7 3/7] drivers:media:radio: wl128x: fmdrv_common sources
From: Manjunatha Halli <manjunatha_halli@...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@...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@...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, ®ion_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, ®ion_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@...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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