mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1675 lines
44 KiB
1675 lines
44 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* 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 <[email protected]> |
|
* Author: Manjunatha Halli <[email protected]> |
|
*/ |
|
|
|
#include <linux/delay.h> |
|
#include <linux/firmware.h> |
|
#include <linux/module.h> |
|
#include <linux/nospec.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(default_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 |
|
}; |
|
|
|
static 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(KERN_CONT "\n data(%d): ", cmd_hdr->dlen); |
|
len = min(len_org, 14); |
|
for (index = 0; index < len; index++) |
|
printk(KERN_CONT "%x ", |
|
skb->data[FM_CMD_MSG_HDR_SIZE + index]); |
|
printk(KERN_CONT "%s", (len_org > 14) ? ".." : ""); |
|
} |
|
printk(KERN_CONT "\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(KERN_CONT "\n data(%d): ", evt_hdr->dlen); |
|
len = min(len_org, 14); |
|
for (index = 0; index < len; index++) |
|
printk(KERN_CONT "%x ", |
|
skb->data[FM_EVT_MSG_HDR_SIZE + index]); |
|
printk(KERN_CONT "%s", (len_org > 14) ? ".." : ""); |
|
} |
|
printk(KERN_CONT "\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(struct tasklet_struct *t) |
|
{ |
|
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 = from_tasklet(fmdev, t, tx_task); |
|
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(struct tasklet_struct *t) |
|
{ |
|
struct fmdev *fmdev; |
|
struct sk_buff *skb; |
|
int len; |
|
|
|
fmdev = from_tasklet(fmdev, t, tx_task); |
|
|
|
if (!atomic_read(&fmdev->tx_cnt)) |
|
return; |
|
|
|
/* Check, is there any timeout happened 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 int 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 = 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) |
|
*(__be16 *)payload = cpu_to_be16(*(u16 *)payload); |
|
|
|
} else if (payload != NULL) { |
|
fm_cb(skb)->fm_op = *((u8 *)payload + 2); |
|
} |
|
if (payload != NULL) |
|
skb_put_data(skb, 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 */ |
|
int 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; |
|
int ret; |
|
|
|
init_completion(&fmdev->maintask_comp); |
|
ret = fm_send_cmd(fmdev, fm_op, type, payload, payload_len, |
|
&fmdev->maintask_comp); |
|
if (ret) |
|
return ret; |
|
|
|
if (!wait_for_completion_timeout(&fmdev->maintask_comp, |
|
FM_DRV_TX_TIMEOUT)) { |
|
fmerr("Timeout(%d sec),didn't get regcompletion signal from RX tasklet\n", |
|
jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000); |
|
return -ETIMEDOUT; |
|
} |
|
if (!fmdev->resp_skb) { |
|
fmerr("Response 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 && |
|
evt_hdr->dlen <= payload_len) { |
|
/* 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 int 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(struct timer_list *t) |
|
{ |
|
struct fmdev *fmdev; |
|
struct fm_irq *fmirq; |
|
|
|
fmdbg("irq: timeout,trying to re-enable fm interrupts\n"); |
|
fmdev = from_timer(fmdev, t, irq_info.timer); |
|
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 duringirq 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; |
|
if (fm_evt_hdr->dlen > sizeof(fmdev->irq_info.flag)) |
|
return; |
|
|
|
/* 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((__force __be16)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 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) { |
|
swap(rds_buff[index], rds_buff[index + 1]); |
|
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[FM_RDS_BLK_SIZE]; |
|
u8 type, blk_idx, 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_D) { |
|
fmdbg("Block sequence mismatch\n"); |
|
rds->last_blk_idx = -1; |
|
break; |
|
} |
|
|
|
/* Skip checkword (control) byte and copy only data byte */ |
|
idx = array_index_nospec(blk_idx * (FM_RDS_BLK_SIZE - 1), |
|
FM_RX_RDS_INFO_FIELD_MAX - (FM_RDS_BLK_SIZE - 1)); |
|
|
|
memcpy(&rds_fmt.data.groupdatabuff.buff[idx], 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((__force __be16)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("Switch 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((__force __be16)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 internal buffer */ |
|
int 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 */ |
|
int fmc_transfer_rds_from_internal_buff(struct fmdev *fmdev, struct file *file, |
|
u8 __user *buf, size_t count) |
|
{ |
|
u32 block_count; |
|
u8 tmpbuf[FM_RDS_BLK_SIZE]; |
|
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 /= FM_RDS_BLK_SIZE; |
|
block_count = 0; |
|
ret = 0; |
|
|
|
while (block_count < count) { |
|
spin_lock_irqsave(&fmdev->rds_buff_lock, flags); |
|
|
|
if (fmdev->rx.rds.wr_idx == fmdev->rx.rds.rd_idx) { |
|
spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags); |
|
break; |
|
} |
|
memcpy(tmpbuf, &fmdev->rx.rds.buff[fmdev->rx.rds.rd_idx], |
|
FM_RDS_BLK_SIZE); |
|
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; |
|
|
|
spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags); |
|
|
|
if (copy_to_user(buf, tmpbuf, FM_RDS_BLK_SIZE)) |
|
break; |
|
|
|
block_count++; |
|
buf += FM_RDS_BLK_SIZE; |
|
ret += FM_RDS_BLK_SIZE; |
|
} |
|
return ret; |
|
} |
|
|
|
int 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; |
|
} |
|
} |
|
|
|
int 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; |
|
} |
|
|
|
} |
|
|
|
int 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; |
|
} |
|
} |
|
|
|
int 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; |
|
} |
|
} |
|
|
|
int 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; |
|
} |
|
} |
|
|
|
int 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 int fm_power_down(struct fmdev *fmdev) |
|
{ |
|
u16 payload; |
|
int 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 int 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 : %zu 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 */ |
|
ret = fmc_send_cmd(fmdev, 0, 0, action->data, |
|
action->size, NULL, NULL); |
|
if (ret) |
|
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 int 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 int fm_power_up(struct fmdev *fmdev, u8 mode) |
|
{ |
|
u16 payload; |
|
__be16 asic_id = 0, asic_ver = 0; |
|
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) */ |
|
int 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) */ |
|
int 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, int 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. |
|
*/ |
|
int fmc_prepare(struct fmdev *fmdev) |
|
{ |
|
static struct st_proto_s fm_st_proto; |
|
int 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.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; |
|
fm_st_proto.chnl_id = 0x08; |
|
fm_st_proto.max_frame_size = 0xff; |
|
fm_st_proto.hdr_len = 1; |
|
fm_st_proto.offset_len_in_hdr = 0; |
|
fm_st_proto.len_size = 1; |
|
fm_st_proto.reserve = 1; |
|
|
|
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__); |
|
|
|
if (!wait_for_completion_timeout(&wait_for_fmdrv_reg_comp, |
|
FM_ST_REG_TIMEOUT)) { |
|
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 < 0) { |
|
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(&fm_st_proto); |
|
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_setup(&fmdev->tx_task, send_tasklet); |
|
|
|
/* Initialize RX Queue and RX tasklet */ |
|
skb_queue_head_init(&fmdev->rx_q); |
|
tasklet_setup(&fmdev->rx_task, recv_tasklet); |
|
|
|
fmdev->irq_info.stage = 0; |
|
atomic_set(&fmdev->tx_cnt, 1); |
|
fmdev->resp_comp = NULL; |
|
|
|
timer_setup(&fmdev->irq_info.timer, int_timeout_handler, 0); |
|
/*TODO: add FM_STIC_EVENT later */ |
|
fmdev->irq_info.mask = FM_MAL_EVENT; |
|
|
|
/* Region info */ |
|
fmdev->rx.region = region_configs[default_radio_region]; |
|
|
|
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. |
|
*/ |
|
int fmc_release(struct fmdev *fmdev) |
|
{ |
|
static struct st_proto_s fm_st_proto; |
|
int ret; |
|
|
|
if (!test_bit(FM_CORE_READY, &fmdev->flag)) { |
|
fmdbg("FM Core is already down\n"); |
|
return 0; |
|
} |
|
/* Service 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; |
|
|
|
memset(&fm_st_proto, 0, sizeof(fm_st_proto)); |
|
fm_st_proto.chnl_id = 0x08; |
|
|
|
ret = st_unregister(&fm_st_proto); |
|
|
|
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; |
|
int 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 <[email protected]>"); |
|
MODULE_DESCRIPTION("FM Driver for TI's Connectivity chip. " FM_DRV_VERSION); |
|
MODULE_VERSION(FM_DRV_VERSION); |
|
MODULE_LICENSE("GPL");
|
|
|