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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* SMI PCIe driver for DVBSky cards.
*
* Copyright (C) 2014 Max nibble <nibble.max@gmail.com>
*/
#include "smipcie.h"
#define SMI_SAMPLE_PERIOD 83
#define SMI_SAMPLE_IDLEMIN (10000 / SMI_SAMPLE_PERIOD)
static void smi_ir_enableInterrupt(struct smi_rc *ir)
{
struct smi_dev *dev = ir->dev;
smi_write(MSI_INT_ENA_SET, IR_X_INT);
}
static void smi_ir_disableInterrupt(struct smi_rc *ir)
{
struct smi_dev *dev = ir->dev;
smi_write(MSI_INT_ENA_CLR, IR_X_INT);
}
static void smi_ir_clearInterrupt(struct smi_rc *ir)
{
struct smi_dev *dev = ir->dev;
smi_write(MSI_INT_STATUS_CLR, IR_X_INT);
}
static void smi_ir_stop(struct smi_rc *ir)
{
struct smi_dev *dev = ir->dev;
smi_ir_disableInterrupt(ir);
smi_clear(IR_Init_Reg, rbIRen);
}
static void smi_raw_process(struct rc_dev *rc_dev, const u8 *buffer,
const u8 length)
{
struct ir_raw_event rawir = {};
int cnt;
for (cnt = 0; cnt < length; cnt++) {
if (buffer[cnt] & 0x7f) {
rawir.pulse = (buffer[cnt] & 0x80) == 0;
rawir.duration = ((buffer[cnt] & 0x7f) +
(rawir.pulse ? 0 : -1)) *
rc_dev->rx_resolution;
ir_raw_event_store_with_filter(rc_dev, &rawir);
}
}
}
static void smi_ir_decode(struct smi_rc *ir)
{
struct smi_dev *dev = ir->dev;
struct rc_dev *rc_dev = ir->rc_dev;
u32 control, data;
u8 index, ir_count, read_loop;
control = smi_read(IR_Init_Reg);
dev_dbg(&rc_dev->dev, "ircontrol: 0x%08x\n", control);
if (control & rbIRVld) {
ir_count = (u8)smi_read(IR_Data_Cnt);
dev_dbg(&rc_dev->dev, "ircount %d\n", ir_count);
read_loop = ir_count / 4;
if (ir_count % 4)
read_loop += 1;
for (index = 0; index < read_loop; index++) {
data = smi_read(IR_DATA_BUFFER_BASE + (index * 4));
dev_dbg(&rc_dev->dev, "IRData 0x%08x\n", data);
ir->irData[index * 4 + 0] = (u8)(data);
ir->irData[index * 4 + 1] = (u8)(data >> 8);
ir->irData[index * 4 + 2] = (u8)(data >> 16);
ir->irData[index * 4 + 3] = (u8)(data >> 24);
}
smi_raw_process(rc_dev, ir->irData, ir_count);
}
if (control & rbIRhighidle) {
struct ir_raw_event rawir = {};
dev_dbg(&rc_dev->dev, "high idle\n");
rawir.pulse = 0;
rawir.duration = SMI_SAMPLE_PERIOD * SMI_SAMPLE_IDLEMIN;
ir_raw_event_store_with_filter(rc_dev, &rawir);
}
smi_set(IR_Init_Reg, rbIRVld);
ir_raw_event_handle(rc_dev);
}
/* ir functions call by main driver.*/
int smi_ir_irq(struct smi_rc *ir, u32 int_status)
{
int handled = 0;
if (int_status & IR_X_INT) {
smi_ir_disableInterrupt(ir);
smi_ir_clearInterrupt(ir);
smi_ir_decode(ir);
smi_ir_enableInterrupt(ir);
handled = 1;
}
return handled;
}
void smi_ir_start(struct smi_rc *ir)
{
struct smi_dev *dev = ir->dev;
smi_write(IR_Idle_Cnt_Low,
(((SMI_SAMPLE_PERIOD - 1) & 0xFFFF) << 16) |
(SMI_SAMPLE_IDLEMIN & 0xFFFF));
msleep(20);
smi_set(IR_Init_Reg, rbIRen | rbIRhighidle);
smi_ir_enableInterrupt(ir);
}
int smi_ir_init(struct smi_dev *dev)
{
int ret;
struct rc_dev *rc_dev;
struct smi_rc *ir = &dev->ir;
rc_dev = rc_allocate_device(RC_DRIVER_IR_RAW);
if (!rc_dev)
return -ENOMEM;
/* init input device */
snprintf(ir->device_name, sizeof(ir->device_name), "IR (%s)",
dev->info->name);
snprintf(ir->input_phys, sizeof(ir->input_phys), "pci-%s/ir0",
pci_name(dev->pci_dev));
rc_dev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
rc_dev->driver_name = "SMI_PCIe";
rc_dev->input_phys = ir->input_phys;
rc_dev->device_name = ir->device_name;
rc_dev->input_id.bustype = BUS_PCI;
rc_dev->input_id.version = 1;
rc_dev->input_id.vendor = dev->pci_dev->subsystem_vendor;
rc_dev->input_id.product = dev->pci_dev->subsystem_device;
rc_dev->dev.parent = &dev->pci_dev->dev;
rc_dev->map_name = dev->info->rc_map;
rc_dev->timeout = SMI_SAMPLE_PERIOD * SMI_SAMPLE_IDLEMIN;
rc_dev->rx_resolution = SMI_SAMPLE_PERIOD;
ir->rc_dev = rc_dev;
ir->dev = dev;
smi_ir_disableInterrupt(ir);
ret = rc_register_device(rc_dev);
if (ret)
goto ir_err;
return 0;
ir_err:
rc_free_device(rc_dev);
return ret;
}
void smi_ir_exit(struct smi_dev *dev)
{
struct smi_rc *ir = &dev->ir;
struct rc_dev *rc_dev = ir->rc_dev;
rc_unregister_device(rc_dev);
smi_ir_stop(ir);
ir->rc_dev = NULL;
}
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