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path: root/drivers/media/radio/wl128x/fmdrv_common.c
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Diffstat (limited to 'drivers/media/radio/wl128x/fmdrv_common.c')
-rw-r--r--drivers/media/radio/wl128x/fmdrv_common.c1677
1 files changed, 1677 insertions, 0 deletions
diff --git a/drivers/media/radio/wl128x/fmdrv_common.c b/drivers/media/radio/wl128x/fmdrv_common.c
new file mode 100644
index 000000000000..64454d39c0ca
--- /dev/null
+++ b/drivers/media/radio/wl128x/fmdrv_common.c
@@ -0,0 +1,1677 @@
+/*
+ * 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) 2011 Texas Instruments
+ * Author: Raja Mani <raja_mani@ti.com>
+ * Author: Manjunatha Halli <manjunatha_halli@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 */
+ {
+ .chanl_space = FM_CHANNEL_SPACING_200KHZ * FM_FREQ_MUL,
+ .bot_freq = 87500, /* 87.5 MHz */
+ .top_freq = 108000, /* 108 MHz */
+ .fm_band = 0,
+ },
+ /* Japan */
+ {
+ .chanl_space = FM_CHANNEL_SPACING_200KHZ * FM_FREQ_MUL,
+ .bot_freq = 76000, /* 76 MHz */
+ .top_freq = 90000, /* 90 MHz */
+ .fm_band = 1,
+ },
+};
+
+/* Band selection */
+static u8 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 u32 default_rds_buf = 300;
+module_param(default_rds_buf, uint, 0444);
+MODULE_PARM_DESC(rds_buf, "RDS buffer entries");
+
+/* Radio Nr */
+static u32 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(struct fmdev *);
+static void fm_irq_handle_flag_getcmd_resp(struct fmdev *);
+static void fm_irq_handle_hw_malfunction(struct fmdev *);
+static void fm_irq_handle_rds_start(struct fmdev *);
+static void fm_irq_send_rdsdata_getcmd(struct fmdev *);
+static void fm_irq_handle_rdsdata_getcmd_resp(struct fmdev *);
+static void fm_irq_handle_rds_finish(struct fmdev *);
+static void fm_irq_handle_tune_op_ended(struct fmdev *);
+static void fm_irq_handle_power_enb(struct fmdev *);
+static void fm_irq_handle_low_rssi_start(struct fmdev *);
+static void fm_irq_afjump_set_pi(struct fmdev *);
+static void fm_irq_handle_set_pi_resp(struct fmdev *);
+static void fm_irq_afjump_set_pimask(struct fmdev *);
+static void fm_irq_handle_set_pimask_resp(struct fmdev *);
+static void fm_irq_afjump_setfreq(struct fmdev *);
+static void fm_irq_handle_setfreq_resp(struct fmdev *);
+static void fm_irq_afjump_enableint(struct fmdev *);
+static void fm_irq_afjump_enableint_resp(struct fmdev *);
+static void fm_irq_start_afjump(struct fmdev *);
+static void fm_irq_handle_start_afjump_resp(struct fmdev *);
+static void fm_irq_afjump_rd_freq(struct fmdev *);
+static void fm_irq_afjump_rd_freq_resp(struct fmdev *);
+static void fm_irq_handle_low_rssi_finish(struct fmdev *);
+static void fm_irq_send_intmsk_cmd(struct fmdev *);
+static void fm_irq_handle_intmsk_cmd_resp(struct fmdev *);
+
+/*
+ * 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_IDX,
+ FM_HANDLE_FLAG_GETCMD_RESP_IDX,
+
+ /* HW malfunction irq handler */
+ FM_HW_MAL_FUNC_IDX,
+
+ /* RDS threshold reached irq handler */
+ FM_RDS_START_IDX,
+ FM_RDS_SEND_RDS_GETCMD_IDX,
+ FM_RDS_HANDLE_RDS_GETCMD_RESP_IDX,
+ FM_RDS_FINISH_IDX,
+
+ /* Tune operation ended irq handler */
+ FM_HW_TUNE_OP_ENDED_IDX,
+
+ /* TX power enable irq handler */
+ FM_HW_POWER_ENB_IDX,
+
+ /* Low RSSI irq handler */
+ FM_LOW_RSSI_START_IDX,
+ FM_AF_JUMP_SETPI_IDX,
+ FM_AF_JUMP_HANDLE_SETPI_RESP_IDX,
+ FM_AF_JUMP_SETPI_MASK_IDX,
+ FM_AF_JUMP_HANDLE_SETPI_MASK_RESP_IDX,
+ FM_AF_JUMP_SET_AF_FREQ_IDX,
+ FM_AF_JUMP_HANDLE_SET_AFFREQ_RESP_IDX,
+ FM_AF_JUMP_ENABLE_INT_IDX,
+ FM_AF_JUMP_ENABLE_INT_RESP_IDX,
+ FM_AF_JUMP_START_AFJUMP_IDX,
+ FM_AF_JUMP_HANDLE_START_AFJUMP_RESP_IDX,
+ FM_AF_JUMP_RD_FREQ_IDX,
+ FM_AF_JUMP_RD_FREQ_RESP_IDX,
+ FM_LOW_RSSI_FINISH_IDX,
+
+ /* Interrupt process post action */
+ FM_SEND_INTMSK_CMD_IDX,
+ FM_HANDLE_INTMSK_CMD_RESP_IDX,
+};
+
+/* FM interrupt handler table */
+static int_handler_prototype int_handler_table[] = {
+ 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;
+
+static inline void fm_irq_call(struct fmdev *fmdev)
+{
+ fmdev->irq_info.handlers[fmdev->irq_info.stage](fmdev);
+}
+
+/* Continue next function in interrupt handler table */
+static inline void fm_irq_call_stage(struct fmdev *fmdev, u8 stage)
+{
+ fmdev->irq_info.stage = stage;
+ fm_irq_call(fmdev);
+}
+
+static inline void fm_irq_timeout_stage(struct fmdev *fmdev, u8 stage)
+{
+ fmdev->irq_info.stage = stage;
+ mod_timer(&fmdev->irq_info.timer, jiffies + FM_DRV_TX_TIMEOUT);
+}
+
+#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;
+ u8 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->hdr,
+ cmd_hdr->len, cmd_hdr->op,
+ 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;
+ u8 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->hdr, evt_hdr->len,
+ evt_hdr->status, evt_hdr->num_fm_hci_cmds, evt_hdr->op,
+ (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 fmdev *fmdev, u8 region_to_set)
+{
+ fmdev->rx.region = region_configs[region_to_set];
+}
+
+/*
+ * FM common sub-module will schedule this tasklet whenever it receives
+ * FM packet from ST driver.
+ */
+static void recv_tasklet(unsigned long arg)
+{
+ struct fmdev *fmdev;
+ struct fm_irq *irq_info;
+ struct fm_event_msg_hdr *evt_hdr;
+ struct sk_buff *skb;
+ u8 num_fm_hci_cmds;
+ unsigned long flags;
+
+ fmdev = (struct fmdev *)arg;
+ irq_info = &fmdev->irq_info;
+ /* Process all packets in the RX queue */
+ while ((skb = skb_dequeue(&fmdev->rx_q))) {
+ if (skb->len < sizeof(struct fm_event_msg_hdr)) {
+ fmerr("skb(%p) has only %d bytes, "
+ "at least need %zu bytes to decode\n", skb,
+ skb->len, sizeof(struct fm_event_msg_hdr));
+ kfree_skb(skb);
+ continue;
+ }
+
+ evt_hdr = (void *)skb->data;
+ num_fm_hci_cmds = evt_hdr->num_fm_hci_cmds;
+
+ /* FM interrupt packet? */
+ if (evt_hdr->op == FM_INTERRUPT) {
+ /* FM interrupt handler started already? */
+ if (!test_bit(FM_INTTASK_RUNNING, &fmdev->flag)) {
+ set_bit(FM_INTTASK_RUNNING, &fmdev->flag);
+ if (irq_info->stage != 0) {
+ fmerr("Inval stage resetting to zero\n");
+ irq_info->stage = 0;
+ }
+
+ /*
+ * Execute first function in interrupt handler
+ * table.
+ */
+ irq_info->handlers[irq_info->stage](fmdev);
+ } else {
+ set_bit(FM_INTTASK_SCHEDULE_PENDING, &fmdev->flag);
+ }
+ kfree_skb(skb);
+ }
+ /* Anyone waiting for this with completion handler? */
+ else if (evt_hdr->op == fmdev->pre_op && fmdev->resp_comp != NULL) {
+
+ spin_lock_irqsave(&fmdev->resp_skb_lock, flags);
+ fmdev->resp_skb = skb;
+ spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);
+ complete(fmdev->resp_comp);
+
+ fmdev->resp_comp = NULL;
+ atomic_set(&fmdev->tx_cnt, 1);
+ }
+ /* Is this for interrupt handler? */
+ else if (evt_hdr->op == fmdev->pre_op && fmdev->resp_comp == NULL) {
+ if (fmdev->resp_skb != NULL)
+ fmerr("Response SKB ptr not NULL\n");
+
+ spin_lock_irqsave(&fmdev->resp_skb_lock, flags);
+ fmdev->resp_skb = skb;
+ spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);
+
+ /* Execute interrupt handler where state index points */
+ irq_info->handlers[irq_info->stage](fmdev);
+
+ kfree_skb(skb);
+ atomic_set(&fmdev->tx_cnt, 1);
+ } else {
+ fmerr("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 fmdev *fmdev;
+ struct sk_buff *skb;
+ int len;
+
+ fmdev = (struct fmdev *)arg;
+
+ if (!atomic_read(&fmdev->tx_cnt))
+ return;
+
+ /* Check, is there any timeout happenned to last transmitted packet */
+ if ((jiffies - fmdev->last_tx_jiffies) > FM_DRV_TX_TIMEOUT) {
+ fmerr("TX timeout occurred\n");
+ atomic_set(&fmdev->tx_cnt, 1);
+ }
+
+ /* Send queued FM TX packets */
+ skb = skb_dequeue(&fmdev->tx_q);
+ if (!skb)
+ return;
+
+ atomic_dec(&fmdev->tx_cnt);
+ fmdev->pre_op = fm_cb(skb)->fm_op;
+
+ if (fmdev->resp_comp != NULL)
+ fmerr("Response completion handler is not NULL\n");
+
+ fmdev->resp_comp = fm_cb(skb)->completion;
+
+ /* Write FM packet to ST driver */
+ len = g_st_write(skb);
+ if (len < 0) {
+ kfree_skb(skb);
+ fmdev->resp_comp = NULL;
+ fmerr("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 u32 fm_send_cmd(struct fmdev *fmdev, u8 fm_op, u16 type, void *payload,
+ int payload_len, struct completion *wait_completion)
+{
+ struct sk_buff *skb;
+ struct fm_cmd_msg_hdr *hdr;
+ int size;
+
+ if (fm_op >= FM_INTERRUPT) {
+ fmerr("Invalid fm opcode - %d\n", fm_op);
+ return -EINVAL;
+ }
+ if (test_bit(FM_FW_DW_INPROGRESS, &fmdev->flag) && payload == NULL) {
+ fmerr("Payload data is NULL during fw download\n");
+ return -EINVAL;
+ }
+ if (!test_bit(FM_FW_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) {
+ fmerr("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_FW_DW_INPROGRESS, &fmdev->flag) ||
+ test_bit(FM_INTTASK_RUNNING, &fmdev->flag)) {
+ /* Fill command header info */
+ hdr = (struct fm_cmd_msg_hdr *)skb_put(skb, FM_CMD_MSG_HDR_SIZE);
+ hdr->hdr = FM_PKT_LOGICAL_CHAN_NUMBER; /* 0x08 */
+
+ /* 3 (fm_opcode,rd_wr,dlen) + payload len) */
+ hdr->len = ((payload == NULL) ? 0 : payload_len) + 3;
+
+ /* FM opcode */
+ hdr->op = fm_op;
+
+ /* read/write type */
+ hdr->rd_wr = type;
+ hdr->dlen = payload_len;
+ fm_cb(skb)->fm_op = fm_op;
+
+ /*
+ * If firmware download has finished and the command is
+ * not a read command then payload is != NULL - a write
+ * command with u16 payload - convert to be16
+ */
+ if (payload != NULL)
+ *(u16 *)payload = cpu_to_be16(*(u16 *)payload);
+
+ } else if (payload != NULL) {
+ fm_cb(skb)->fm_op = *((u8 *)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 response */
+u32 fmc_send_cmd(struct fmdev *fmdev, u8 fm_op, u16 type, void *payload,
+ unsigned int payload_len, void *response, int *response_len)
+{
+ struct sk_buff *skb;
+ struct fm_event_msg_hdr *evt_hdr;
+ unsigned long flags;
+ u32 ret;
+
+ init_completion(&fmdev->maintask_comp);
+ ret = fm_send_cmd(fmdev, fm_op, type, payload, payload_len,
+ &fmdev->maintask_comp);
+ if (ret)
+ return ret;
+
+ ret = wait_for_completion_timeout(&fmdev->maintask_comp, FM_DRV_TX_TIMEOUT);
+ if (!ret) {
+ fmerr("Timeout(%d sec),didn't get reg"
+ "completion signal from RX tasklet\n",
+ jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000);
+ return -ETIMEDOUT;
+ }
+ if (!fmdev->resp_skb) {
+ fmerr("Reponse SKB is missing\n");
+ return -EFAULT;
+ }
+ spin_lock_irqsave(&fmdev->resp_skb_lock, flags);
+ skb = fmdev->resp_skb;
+ fmdev->resp_skb = NULL;
+ spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);
+
+ evt_hdr = (void *)skb->data;
+ if (evt_hdr->status != 0) {
+ fmerr("Received event pkt status(%d) is not zero\n",
+ evt_hdr->status);
+ kfree_skb(skb);
+ return -EIO;
+ }
+ /* Send response data to caller */
+ if (response != NULL && response_len != NULL && evt_hdr->dlen) {
+ /* Skip header info and copy only response data */
+ skb_pull(skb, sizeof(struct fm_event_msg_hdr));
+ memcpy(response, skb->data, evt_hdr->dlen);
+ *response_len = evt_hdr->dlen;
+ } else if (response_len != NULL && evt_hdr->dlen == 0) {
+ *response_len = 0;
+ }
+ kfree_skb(skb);
+
+ return 0;
+}
+
+/* --- Helper functions used in FM interrupt handlers ---*/
+static inline u32 check_cmdresp_status(struct fmdev *fmdev,
+ struct sk_buff **skb)
+{
+ struct fm_event_msg_hdr *fm_evt_hdr;
+ unsigned long flags;
+
+ del_timer(&fmdev->irq_info.timer);
+
+ spin_lock_irqsave(&fmdev->resp_skb_lock, flags);
+ *skb = fmdev->resp_skb;
+ fmdev->resp_skb = NULL;
+ spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);
+
+ fm_evt_hdr = (void *)(*skb)->data;
+ if (fm_evt_hdr->status != 0) {
+ fmerr("irq: opcode %x response status is not zero "
+ "Initiating irq recovery process\n",
+ fm_evt_hdr->op);
+
+ mod_timer(&fmdev->irq_info.timer, jiffies + FM_DRV_TX_TIMEOUT);
+ return -1;
+ }
+
+ return 0;
+}
+
+static inline void fm_irq_common_cmd_resp_helper(struct fmdev *fmdev, u8 stage)
+{
+ struct sk_buff *skb;
+
+ if (!check_cmdresp_status(fmdev, &skb))
+ fm_irq_call_stage(fmdev, stage);
+}
+
+/*
+ * 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 fmdev *fmdev;
+ struct fm_irq *fmirq;
+
+ fmdbg("irq: timeout,trying to re-enable fm interrupts\n");
+ fmdev = (struct fmdev *)data;
+ fmirq = &fmdev->irq_info;
+ fmirq->retry++;
+
+ if (fmirq->retry > FM_IRQ_TIMEOUT_RETRY_MAX) {
+ /* Stop recovery action (interrupt reenable process) and
+ * reset stage index & retry count values */
+ fmirq->stage = 0;
+ fmirq->retry = 0;
+ fmerr("Recovery action failed during"
+ "irq processing, max retry reached\n");
+ return;
+ }
+ fm_irq_call_stage(fmdev, FM_SEND_INTMSK_CMD_IDX);
+}
+
+/* --------- FM interrupt handlers ------------*/
+static void fm_irq_send_flag_getcmd(struct fmdev *fmdev)
+{
+ u16 flag;
+
+ /* Send FLAG_GET command , to know the source of interrupt */
+ if (!fm_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, sizeof(flag), NULL))
+ fm_irq_timeout_stage(fmdev, FM_HANDLE_FLAG_GETCMD_RESP_IDX);
+}
+
+static void fm_irq_handle_flag_getcmd_resp(struct fmdev *fmdev)
+{
+ struct sk_buff *skb;
+ struct fm_event_msg_hdr *fm_evt_hdr;
+
+ if (check_cmdresp_status(fmdev, &skb))
+ 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);
+ fmdbg("irq: flag register(0x%x)\n", fmdev->irq_info.flag);
+
+ /* Continue next function in interrupt handler table */
+ fm_irq_call_stage(fmdev, FM_HW_MAL_FUNC_IDX);
+}
+
+static void fm_irq_handle_hw_malfunction(struct fmdev *fmdev)
+{
+ if (fmdev->irq_info.flag & FM_MAL_EVENT & fmdev->irq_info.mask)
+ fmerr("irq: HW MAL int received - do nothing\n");
+
+ /* Continue next function in interrupt handler table */
+ fm_irq_call_stage(fmdev, FM_RDS_START_IDX);
+}
+
+static void fm_irq_handle_rds_start(struct fmdev *fmdev)
+{
+ if (fmdev->irq_info.flag & FM_RDS_EVENT & fmdev->irq_info.mask) {
+ fmdbg("irq: rds threshold reached\n");
+ fmdev->irq_info.stage = FM_RDS_SEND_RDS_GETCMD_IDX;
+ } else {
+ /* Continue next function in interrupt handler table */
+ fmdev->irq_info.stage = FM_HW_TUNE_OP_ENDED_IDX;
+ }
+
+ fm_irq_call(fmdev);
+}
+
+static void fm_irq_send_rdsdata_getcmd(struct fmdev *fmdev)
+{
+ /* Send the command to read RDS data from the chip */
+ if (!fm_send_cmd(fmdev, RDS_DATA_GET, REG_RD, NULL,
+ (FM_RX_RDS_FIFO_THRESHOLD * 3), NULL))
+ fm_irq_timeout_stage(fmdev, FM_RDS_HANDLE_RDS_GETCMD_RESP_IDX);
+}
+
+/* Keeps track of current RX channel AF (Alternate Frequency) */
+static void fm_rx_update_af_cache(struct fmdev *fmdev, u8 af)
+{
+ struct tuned_station_info *stat_info = &fmdev->rx.stat_info;
+ u8 reg_idx = fmdev->rx.region.fm_band;
+ u8 index;
+ u32 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.stat_info.af_list_max = (af - FM_RDS_1_AF_FOLLOWS + 1);
+ fmdev->rx.stat_info.afcache_size = 0;
+ fmdbg("No of expected AF : %d\n", fmdev->rx.stat_info.af_list_max);
+ return;
+ }
+
+ if (af < FM_RDS_MIN_AF)
+ return;
+ if (reg_idx == FM_BAND_EUROPE_US && af > FM_RDS_MAX_AF)
+ return;
+ if (reg_idx == FM_BAND_JAPAN && af > FM_RDS_MAX_AF_JAPAN)
+ return;
+
+ freq = fmdev->rx.region.bot_freq + (af * 100);
+ if (freq == fmdev->rx.freq) {
+ fmdbg("Current freq(%d) is matching with received AF(%d)\n",
+ fmdev->rx.freq, freq);
+ return;
+ }
+ /* Do check in AF cache */
+ for (index = 0; index < stat_info->afcache_size; index++) {
+ if (stat_info->af_cache[index] == freq)
+ break;
+ }
+ /* Reached the limit of the list - ignore the next AF */
+ if (index == stat_info->af_list_max) {
+ fmdbg("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 == stat_info->afcache_size) {
+ fmdbg("Storing AF %d to cache index %d\n", freq, index);
+ stat_info->af_cache[index] = freq;
+ stat_info->afcache_size++;
+ }
+}
+
+/*
+ * Converts RDS buffer data from big endian format
+ * to little endian format.
+ */
+static void fm_rdsparse_swapbytes(struct fmdev *fmdev,
+ struct fm_rdsdata_format *rds_format)
+{
+ u8 byte1;
+ u8 index = 0;
+ u8 *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->data.groupdatabuff.buff[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(struct fmdev *fmdev)
+{
+ struct sk_buff *skb;
+ struct fm_rdsdata_format rds_fmt;
+ struct fm_rds *rds = &fmdev->rx.rds;
+ unsigned long group_idx, flags;
+ u8 *rds_data, meta_data, tmpbuf[3];
+ u8 type, blk_idx;
+ u16 cur_picode;
+ u32 rds_len;
+
+ if (check_cmdresp_status(fmdev, &skb))
+ 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_BLK_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 blk type into index sequence (0, 1, 2, 3, 4) */
+ blk_idx = (type <= FM_RDS_BLOCK_C ? type : (type - 1));
+ fmdbg("Block index:%d(%s)\n", blk_idx,
+ (meta_data & FM_RDS_STATUS_ERR_MASK) ? "Bad" : "Ok");
+
+ if ((meta_data & FM_RDS_STATUS_ERR_MASK) != 0)
+ break;
+
+ if (blk_idx < FM_RDS_BLK_IDX_A || blk_idx > FM_RDS_BLK_IDX_D) {
+ fmdbg("Block sequence mismatch\n");
+ rds->last_blk_idx = -1;
+ break;
+ }
+
+ /* Skip checkword (control) byte and copy only data byte */
+ memcpy(&rds_fmt.data.groupdatabuff.
+ buff[blk_idx * (FM_RDS_BLK_SIZE - 1)],
+ rds_data, (FM_RDS_BLK_SIZE - 1));
+
+ rds->last_blk_idx = blk_idx;
+
+ /* If completed a whole group then handle it */
+ if (blk_idx == FM_RDS_BLK_IDX_D) {
+ fmdbg("Good block received\n");
+ fm_rdsparse_swapbytes(fmdev, &rds_fmt);
+
+ /*
+ * Extract PI code and store in local cache.
+ * We need this during AF switch processing.
+ */
+ cur_picode = be16_to_cpu(rds_fmt.data.groupgeneral.pidata);
+ if (fmdev->rx.stat_info.picode != cur_picode)
+ fmdev->rx.stat_info.picode = cur_picode;
+
+ fmdbg("picode:%d\n", cur_picode);
+
+ group_idx = (rds_fmt.data.groupgeneral.blk_b[0] >> 3);
+ fmdbg("(fmdrv):Group:%ld%s\n", group_idx/2,
+ (group_idx % 2) ? "B" : "A");
+
+ group_idx = 1 << (rds_fmt.data.groupgeneral.blk_b[0] >> 3);
+ if (group_idx == FM_RDS_GROUP_TYPE_MASK_0A) {
+ fm_rx_update_af_cache(fmdev, rds_fmt.data.group0A.af[0]);
+ fm_rx_update_af_cache(fmdev, rds_fmt.data.group0A.af[1]);
+ }
+ }
+ rds_len -= FM_RDS_BLK_SIZE;
+ rds_data += FM_RDS_BLK_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);
+ blk_idx = (type <= FM_RDS_BLOCK_C ? type : (type - 1));
+ tmpbuf[2] = blk_idx; /* Offset name */
+ tmpbuf[2] |= blk_idx << 3; /* Received offset */
+
+ /* Store data byte */
+ tmpbuf[0] = rds_data[0];
+ tmpbuf[1] = rds_data[1];
+
+ memcpy(&rds->buff[rds->wr_idx], &tmpbuf, FM_RDS_BLK_SIZE);
+ rds->wr_idx = (rds->wr_idx + FM_RDS_BLK_SIZE) % rds->buf_size;
+
+ /* Check for overflow & start over */
+ if (rds->wr_idx == rds->rd_idx) {
+ fmdbg("RDS buffer overflow\n");
+ rds->wr_idx = 0;
+ rds->rd_idx = 0;
+ break;
+ }
+ rds_len -= FM_RDS_BLK_SIZE;
+ rds_data += FM_RDS_BLK_SIZE;
+ }
+ spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags);
+
+ /* Wakeup read queue */
+ if (rds->wr_idx != rds->rd_idx)
+ wake_up_interruptible(&rds->read_queue);
+
+ fm_irq_call_stage(fmdev, FM_RDS_FINISH_IDX);
+}
+
+static void fm_irq_handle_rds_finish(struct fmdev *fmdev)
+{
+ fm_irq_call_stage(fmdev, FM_HW_TUNE_OP_ENDED_IDX);
+}
+
+static void fm_irq_handle_tune_op_ended(struct fmdev *fmdev)
+{
+ if (fmdev->irq_info.flag & (FM_FR_EVENT | FM_BL_EVENT) & fmdev->
+ irq_info.mask) {
+ fmdbg("irq: tune ended/bandlimit reached\n");
+ if (test_and_clear_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag)) {
+ fmdev->irq_info.stage = FM_AF_JUMP_RD_FREQ_IDX;
+ } else {
+ complete(&fmdev->maintask_comp);
+ fmdev->irq_info.stage = FM_HW_POWER_ENB_IDX;
+ }
+ } else
+ fmdev->irq_info.stage = FM_HW_POWER_ENB_IDX;
+
+ fm_irq_call(fmdev);
+}
+
+static void fm_irq_handle_power_enb(struct fmdev *fmdev)
+{
+ if (fmdev->irq_info.flag & FM_POW_ENB_EVENT) {
+ fmdbg("irq: Power Enabled/Disabled\n");
+ complete(&fmdev->maintask_comp);
+ }
+
+ fm_irq_call_stage(fmdev, FM_LOW_RSSI_START_IDX);
+}
+
+static void fm_irq_handle_low_rssi_start(struct fmdev *fmdev)
+{
+ 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.freq != FM_UNDEFINED_FREQ) &&
+ (fmdev->rx.stat_info.afcache_size != 0)) {
+ fmdbg("irq: rssi level has fallen below threshold level\n");
+
+ /* Disable further low RSSI interrupts */
+ fmdev->irq_info.mask &= ~FM_LEV_EVENT;
+
+ fmdev->rx.afjump_idx = 0;
+ fmdev->rx.freq_before_jump = fmdev->rx.freq;
+ fmdev->irq_info.stage = FM_AF_JUMP_SETPI_IDX;
+ } else {
+ /* Continue next function in interrupt handler table */
+ fmdev->irq_info.stage = FM_SEND_INTMSK_CMD_IDX;
+ }
+
+ fm_irq_call(fmdev);
+}
+
+static void fm_irq_afjump_set_pi(struct fmdev *fmdev)
+{
+ u16 payload;
+
+ /* Set PI code - must be updated if the AF list is not empty */
+ payload = fmdev->rx.stat_info.picode;
+ if (!fm_send_cmd(fmdev, RDS_PI_SET, REG_WR, &payload, sizeof(payload), NULL))
+ fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SETPI_RESP_IDX);
+}
+
+static void fm_irq_handle_set_pi_resp(struct fmdev *fmdev)
+{
+ fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_SETPI_MASK_IDX);
+}
+
+/*
+ * Set PI mask.
+ * 0xFFFF = Enable PI code matching
+ * 0x0000 = Disable PI code matching
+ */
+static void fm_irq_afjump_set_pimask(struct fmdev *fmdev)
+{
+ u16 payload;
+
+ payload = 0x0000;
+ if (!fm_send_cmd(fmdev, RDS_PI_MASK_SET, REG_WR, &payload, sizeof(payload), NULL))
+ fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SETPI_MASK_RESP_IDX);
+}
+
+static void fm_irq_handle_set_pimask_resp(struct fmdev *fmdev)
+{
+ fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_SET_AF_FREQ_IDX);
+}
+
+static void fm_irq_afjump_setfreq(struct fmdev *fmdev)
+{
+ u16 frq_index;
+ u16 payload;
+
+ fmdbg("Swtich to %d KHz\n", fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx]);
+ frq_index = (fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx] -
+ fmdev->rx.region.bot_freq) / FM_FREQ_MUL;
+
+ payload = frq_index;
+ if (!fm_send_cmd(fmdev, AF_FREQ_SET, REG_WR, &payload, sizeof(payload), NULL))
+ fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SET_AFFREQ_RESP_IDX);
+}
+
+static void fm_irq_handle_setfreq_resp(struct fmdev *fmdev)
+{
+ fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_ENABLE_INT_IDX);
+}
+
+static void fm_irq_afjump_enableint(struct fmdev *fmdev)
+{
+ u16 payload;
+
+ /* Enable FR (tuning operation ended) interrupt */
+ payload = FM_FR_EVENT;
+ if (!fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload, sizeof(payload), NULL))
+ fm_irq_timeout_stage(fmdev, FM_AF_JUMP_ENABLE_INT_RESP_IDX);
+}
+
+static void fm_irq_afjump_enableint_resp(struct fmdev *fmdev)
+{
+ fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_START_AFJUMP_IDX);
+}
+
+static void fm_irq_start_afjump(struct fmdev *fmdev)
+{
+ u16 payload;
+
+ payload = FM_TUNER_AF_JUMP_MODE;
+ if (!fm_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,
+ sizeof(payload), NULL))
+ fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_START_AFJUMP_RESP_IDX);
+}
+
+static void fm_irq_handle_start_afjump_resp(struct fmdev *fmdev)
+{
+ struct sk_buff *skb;
+
+ if (check_cmdresp_status(fmdev, &skb))
+ return;
+
+ fmdev->irq_info.stage = FM_SEND_FLAG_GETCMD_IDX;
+ set_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag);
+ clear_bit(FM_INTTASK_RUNNING, &fmdev->flag);
+}
+
+static void fm_irq_afjump_rd_freq(struct fmdev *fmdev)
+{
+ u16 payload;
+
+ if (!fm_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, sizeof(payload), NULL))
+ fm_irq_timeout_stage(fmdev, FM_AF_JUMP_RD_FREQ_RESP_IDX);
+}
+
+static void fm_irq_afjump_rd_freq_resp(struct fmdev *fmdev)
+{
+ struct sk_buff *skb;
+ u16 read_freq;
+ u32 curr_freq, jumped_freq;
+
+ if (check_cmdresp_status(fmdev, &skb))
+ 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.bot_freq + ((u32)read_freq * FM_FREQ_MUL);
+
+ jumped_freq = fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx];
+
+ /* If the frequency was changed the jump succeeded */
+ if ((curr_freq != fmdev->rx.freq_before_jump) && (curr_freq == jumped_freq)) {
+ fmdbg("Successfully switched to alternate freq %d\n", curr_freq);
+ fmdev->rx.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 = FM_LOW_RSSI_FINISH_IDX;
+ } else { /* jump to the next freq in the AF list */
+ fmdev->rx.afjump_idx++;
+
+ /* If we reached the end of the list - stop searching */
+ if (fmdev->rx.afjump_idx >= fmdev->rx.stat_info.afcache_size) {
+ fmdbg("AF switch processing failed\n");
+ fmdev->irq_info.stage = FM_LOW_RSSI_FINISH_IDX;
+ } else { /* AF List is not over - try next one */
+
+ fmdbg("Trying next freq in AF cache\n");
+ fmdev->irq_info.stage = FM_AF_JUMP_SETPI_IDX;
+ }
+ }
+ fm_irq_call(fmdev);
+}
+
+static void fm_irq_handle_low_rssi_finish(struct fmdev *fmdev)
+{
+ fm_irq_call_stage(fmdev, FM_SEND_INTMSK_CMD_IDX);
+}
+
+static void fm_irq_send_intmsk_cmd(struct fmdev *fmdev)
+{
+ u16 payload;
+
+ /* Re-enable FM interrupts */
+ payload = fmdev->irq_info.mask;
+
+ if (!fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
+ sizeof(payload), NULL))
+ fm_irq_timeout_stage(fmdev, FM_HANDLE_INTMSK_CMD_RESP_IDX);
+}
+
+static void fm_irq_handle_intmsk_cmd_resp(struct fmdev *fmdev)
+{
+ struct sk_buff *skb;
+
+ if (check_cmdresp_status(fmdev, &skb))
+ return;
+ /*
+ * This is last function in interrupt table to be executed.
+ * So, reset stage index to 0.
+ */
+ fmdev->irq_info.stage = FM_SEND_FLAG_GETCMD_IDX;
+
+ /* Start processing any pending interrupt */
+ if (test_and_clear_bit(FM_INTTASK_SCHEDULE_PENDING, &fmdev->flag))
+ fmdev->irq_info.handlers[fmdev->irq_info.stage](fmdev);
+ else
+ clear_bit(FM_INTTASK_RUNNING, &fmdev->flag);
+}
+
+/* Returns availability of RDS data in internel buffer */
+u32 fmc_is_rds_data_available(struct fmdev *fmdev, struct file *file,
+ struct poll_table_struct *pts)
+{
+ poll_wait(file, &fmdev->rx.rds.read_queue, pts);
+ if (fmdev->rx.rds.rd_idx != fmdev->rx.rds.wr_idx)
+ return 0;
+
+ return -EAGAIN;
+}
+
+/* Copies RDS data from internal buffer to user buffer */
+u32 fmc_transfer_rds_from_internal_buff(struct fmdev *fmdev, struct file *file,
+ u8 __user *buf, size_t count)
+{
+ u32 block_count;
+ unsigned long flags;
+ int ret;
+
+ if (fmdev->rx.rds.wr_idx == fmdev->rx.rds.rd_idx) {
+ if (file->f_flags & O_NONBLOCK)
+ return -EWOULDBLOCK;
+
+ ret = wait_event_interruptible(fmdev->rx.rds.read_queue,
+ (fmdev->rx.rds.wr_idx != fmdev->rx.rds.rd_idx));
+ 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_idx == fmdev->rx.rds.rd_idx)
+ break;
+
+ if (copy_to_user(buf, &fmdev->rx.rds.buff[fmdev->rx.rds.rd_idx],
+ FM_RDS_BLK_SIZE))
+ break;
+
+ fmdev->rx.rds.rd_idx += FM_RDS_BLK_SIZE;
+ if (fmdev->rx.rds.rd_idx >= fmdev->rx.rds.buf_size)
+ fmdev->rx.rds.rd_idx = 0;
+
+ block_count++;
+ buf += FM_RDS_BLK_SIZE;
+ ret += FM_RDS_BLK_SIZE;
+ }
+ spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags);
+ return ret;
+}
+
+u32 fmc_set_freq(struct fmdev *fmdev, u32 freq_to_set)
+{
+ switch (fmdev->curr_fmmode) {
+ case FM_MODE_RX:
+ return fm_rx_set_freq(fmdev, freq_to_set);
+
+ case FM_MODE_TX:
+ return fm_tx_set_freq(fmdev, freq_to_set);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+u32 fmc_get_freq(struct fmdev *fmdev, u32 *cur_tuned_frq)
+{
+ if (fmdev->rx.freq == FM_UNDEFINED_FREQ) {
+ fmerr("RX frequency is not set\n");
+ return -EPERM;
+ }
+ if (cur_tuned_frq == NULL) {
+ fmerr("Invalid memory\n");
+ return -ENOMEM;
+ }
+
+ switch (fmdev->curr_fmmode) {
+ case FM_MODE_RX:
+ *cur_tuned_frq = fmdev->rx.freq;
+ return 0;
+
+ case FM_MODE_TX:
+ *cur_tuned_frq = 0; /* TODO : Change this later */
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+
+}
+
+u32 fmc_set_region(struct fmdev *fmdev, u8 region_to_set)
+{
+ switch (fmdev->curr_fmmode) {
+ case FM_MODE_RX:
+ return fm_rx_set_region(fmdev, region_to_set);
+
+ case FM_MODE_TX:
+ return fm_tx_set_region(fmdev, region_to_set);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+u32 fmc_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset)
+{
+ switch (fmdev->curr_fmmode) {
+ case FM_MODE_RX:
+ return fm_rx_set_mute_mode(fmdev, mute_mode_toset);
+
+ case FM_MODE_TX:
+ return fm_tx_set_mute_mode(fmdev, mute_mode_toset);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+u32 fmc_set_stereo_mono(struct fmdev *fmdev, u16 mode)
+{
+ switch (fmdev->curr_fmmode) {
+ case FM_MODE_RX:
+ return fm_rx_set_stereo_mono(fmdev, mode);
+
+ case FM_MODE_TX:
+ return fm_tx_set_stereo_mono(fmdev, mode);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+u32 fmc_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis)
+{
+ switch (fmdev->curr_fmmode) {
+ case FM_MODE_RX:
+ return fm_rx_set_rds_mode(fmdev, rds_en_dis);
+
+ case FM_MODE_TX:
+ return fm_tx_set_rds_mode(fmdev, rds_en_dis);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+/* Sends power off command to the chip */
+static u32 fm_power_down(struct fmdev *fmdev)
+{
+ u16 payload;
+ u32 ret;
+
+ if (!test_bit(FM_CORE_READY, &fmdev->flag)) {
+ fmerr("FM core is not ready\n");
+ return -EPERM;
+ }
+ if (fmdev->curr_fmmode == FM_MODE_OFF) {
+ fmdbg("FM chip is already in OFF state\n");
+ return 0;
+ }
+
+ payload = 0x0;
+ ret = fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ return fmc_release(fmdev);
+}
+
+/* Reads init command from FM firmware file and loads to the chip */
+static u32 fm_download_firmware(struct fmdev *fmdev, const u8 *fw_name)
+{
+ const struct firmware *fw_entry;
+ struct bts_header *fw_header;
+ struct bts_action *action;
+ struct bts_action_delay *delay;
+ u8 *fw_data;
+ int ret, fw_len, cmd_cnt;
+
+ cmd_cnt = 0;
+ set_bit(FM_FW_DW_INPROGRESS, &fmdev->flag);
+
+ ret = request_firmware(&fw_entry, fw_name,
+ &fmdev->radio_dev->dev);
+ if (ret < 0) {
+ fmerr("Unable to read firmware(%s) content\n", fw_name);
+ return ret;
+ }
+ fmdbg("Firmware(%s) length : %d bytes\n", fw_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) {
+ fmerr("%s not a legal TI firmware file\n", fw_name);
+ ret = -EINVAL;
+ goto rel_fw;
+ }
+ fmdbg("FW(%s) magic number : 0x%x\n", fw_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 */
+ if (fmc_send_cmd(fmdev, 0, 0, action->data,
+ action->size, NULL, NULL))
+ 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));
+ }
+ fmdbg("Firmware commands(%d) loaded to chip\n", cmd_cnt);
+rel_fw:
+ release_firmware(fw_entry);
+ clear_bit(FM_FW_DW_INPROGRESS, &fmdev->flag);
+
+ return ret;
+}
+
+/* Loads default RX configuration to the chip */
+static u32 load_default_rx_configuration(struct fmdev *fmdev)
+{
+ int ret;
+
+ ret = fm_rx_set_volume(fmdev, FM_DEFAULT_RX_VOLUME);
+ if (ret < 0)
+ return ret;
+
+ return fm_rx_set_rssi_threshold(fmdev, FM_DEFAULT_RSSI_THRESHOLD);
+}
+
+/* Does FM power on sequence */
+static u32 fm_power_up(struct fmdev *fmdev, u8 mode)
+{
+ u16 payload, asic_id, asic_ver;
+ int resp_len, ret;
+ u8 fw_name[50];
+
+ if (mode >= FM_MODE_ENTRY_MAX) {
+ fmerr("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) {
+ fmerr("Unable to prepare FM Common\n");
+ return ret;
+ }
+
+ payload = FM_ENABLE;
+ if (fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload,
+ sizeof(payload), NULL, NULL))
+ goto rel;
+
+ /* Allow the chip to settle down in Channel-8 mode */
+ msleep(20);
+
+ if (fmc_send_cmd(fmdev, ASIC_ID_GET, REG_RD, NULL,
+ sizeof(asic_id), &asic_id, &resp_len))
+ goto rel;
+
+ if (fmc_send_cmd(fmdev, ASIC_VER_GET, REG_RD, NULL,
+ sizeof(asic_ver), &asic_ver, &resp_len))
+ goto rel;
+
+ fmdbg("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) {
+ fmdbg("Failed to download firmware file %s\n", fw_name);
+ goto rel;
+ }
+ sprintf(fw_name, "%s_%x.%d.bts", (mode == 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) {
+ fmdbg("Failed to download firmware file %s\n", fw_name);
+ goto rel;
+ } else
+ return ret;
+rel:
+ return fmc_release(fmdev);
+}
+
+/* Set FM Modes(TX, RX, OFF) */
+u32 fmc_set_mode(struct fmdev *fmdev, u8 fm_mode)
+{
+ int ret = 0;
+
+ if (fm_mode >= FM_MODE_ENTRY_MAX) {
+ fmerr("Invalid FM mode\n");
+ return -EINVAL;
+ }
+ if (fmdev->curr_fmmode == fm_mode) {
+ fmdbg("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) {
+ fmerr("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) {
+ fmerr("Failed to set OFF mode\n");
+ return ret;
+ }
+ msleep(30);
+ }
+ ret = fm_power_up(fmdev, fm_mode);
+ if (ret < 0) {
+ fmerr("Failed to load firmware\n");
+ return ret;
+ }
+ }
+ fmdev->curr_fmmode = fm_mode;
+
+ /* Set default configuration */
+ if (fmdev->curr_fmmode == FM_MODE_RX) {
+ fmdbg("Loading default rx configuration..\n");
+ ret = load_default_rx_configuration(fmdev);
+ if (ret < 0)
+ fmerr("Failed to load default values\n");
+ }
+
+ return ret;
+}
+
+/* Returns current FM mode (TX, RX, OFF) */
+u32 fmc_get_mode(struct fmdev *fmdev, u8 *fmmode)
+{
+ if (!test_bit(FM_CORE_READY, &fmdev->flag)) {
+ fmerr("FM core is not ready\n");
+ return -EPERM;
+ }
+ if (fmmode == NULL) {
+ fmerr("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 fmdev *fmdev;
+
+ fmdev = (struct fmdev *)arg;
+
+ if (skb == NULL) {
+ fmerr("Invalid SKB received from ST\n");
+ return -EFAULT;
+ }
+
+ if (skb->cb[0] != FM_PKT_LOGICAL_CHAN_NUMBER) {
+ fmerr("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 fmdev *fmdev;
+
+ fmdev = (struct fmdev *)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.
+ */
+u32 fmc_prepare(struct fmdev *fmdev)
+{
+ static struct st_proto_s fm_st_proto;
+ u32 ret;
+
+ if (test_bit(FM_CORE_READY, &fmdev->flag)) {
+ fmdbg("FM Core is already up\n");
+ return 0;
+ }
+
+ 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;
+ fmdbg("%s waiting for ST reg completion signal\n", __func__);
+
+ ret = wait_for_completion_timeout(&wait_for_fmdrv_reg_comp,
+ FM_ST_REG_TIMEOUT);
+
+ if (!ret) {
+ fmerr("Timeout(%d sec), didn't get reg "
+ "completion signal from ST\n",
+ jiffies_to_msecs(FM_ST_REG_TIMEOUT) / 1000);
+ return -ETIMEDOUT;
+ }
+ if (fmdev->streg_cbdata != 0) {
+ fmerr("ST reg comp CB called with error "
+ "status %d\n", fmdev->streg_cbdata);
+ return -EAGAIN;
+ }
+
+ ret = 0;
+ } else if (ret == -1) {
+ fmerr("st_register failed %d\n", ret);
+ return -EAGAIN;
+ }
+
+ if (fm_st_proto.write != NULL) {
+ g_st_write = fm_st_proto.write;
+ } else {
+ fmerr("Failed to get ST write func pointer\n");
+ ret = st_unregister(ST_FM);
+ if (ret < 0)
+ fmerr("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 = 0;
+ atomic_set(&fmdev->tx_cnt, 1);
+ fmdev->resp_comp = NULL;
+
+ init_timer(&fmdev->irq_info.timer);
+ fmdev->irq_info.timer.function = &int_timeout_handler;
+ fmdev->irq_info.timer.data = (unsigned long)fmdev;
+ /*TODO: add FM_STIC_EVENT later */
+ fmdev->irq_info.mask = FM_MAL_EVENT;
+
+ /* Region info */
+ memcpy(&fmdev->rx.region, &region_configs[default_radio_region],
+ sizeof(struct region_info));
+
+ fmdev->rx.mute_mode = FM_MUTE_OFF;
+ fmdev->rx.rf_depend_mute = FM_RX_RF_DEPENDENT_MUTE_OFF;
+ fmdev->rx.rds.flag = FM_RDS_DISABLE;
+ fmdev->rx.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.retry = 0;
+
+ fm_rx_reset_rds_cache(fmdev);
+ init_waitqueue_head(&fmdev->rx.rds.read_queue);
+
+ fm_rx_reset_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.
+ */
+u32 fmc_release(struct fmdev *fmdev)
+{
+ u32 ret;
+
+ if (!test_bit(FM_CORE_READY, &fmdev->flag)) {
+ fmdbg("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->resp_comp = NULL;
+ fmdev->rx.freq = 0;
+
+ ret = st_unregister(ST_FM);
+ if (ret < 0)
+ fmerr("Failed to de-register FM from ST %d\n", ret);
+ else
+ fmdbg("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 fmdev *fmdev = NULL;
+ u32 ret = -ENOMEM;
+
+ fmdbg("FM driver version %s\n", FM_DRV_VERSION);
+
+ fmdev = kzalloc(sizeof(struct fmdev), GFP_KERNEL);
+ if (NULL == fmdev) {
+ fmerr("Can't allocate operation structure memory\n");
+ return ret;
+ }
+ fmdev->rx.rds.buf_size = default_rds_buf * FM_RDS_BLK_SIZE;
+ fmdev->rx.rds.buff = kzalloc(fmdev->rx.rds.buf_size, GFP_KERNEL);
+ if (NULL == fmdev->rx.rds.buff) {
+ fmerr("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.handlers = int_handler_table;
+ 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.buff);
+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 fmdev *fmdev = NULL;
+
+ fmdev = fm_v4l2_deinit_video_device();
+ if (fmdev != NULL) {
+ kfree(fmdev->rx.rds.buff);
+ kfree(fmdev);
+ }
+}
+
+module_init(fm_drv_init);
+module_exit(fm_drv_exit);
+
+/* ------------- Module Info ------------- */
+MODULE_AUTHOR("Manjunatha Halli <manjunatha_halli@ti.com>");
+MODULE_DESCRIPTION("FM Driver for TI's Connectivity chip. " FM_DRV_VERSION);
+MODULE_VERSION(FM_DRV_VERSION);
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 22:06:29 +0100