diff options
Diffstat (limited to 'drivers/media/radio/wl128x/fmdrv_common.c')
| -rw-r--r-- | drivers/media/radio/wl128x/fmdrv_common.c | 1677 |
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 0000000..64454d3 --- /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, ®ion_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"); |
