drivers/media/pci/ddbridge/ddbridge-max.c

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/ddbridge/ddbridge-max.c

Extension

.c

Size

12391 bytes

Lines

496

Domain

Driver Families

Bucket

drivers/media

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/init.h
• linux/interrupt.h
• linux/delay.h
• linux/slab.h
• linux/poll.h
• linux/io.h
• linux/pci.h
• linux/pci_ids.h
• linux/timer.h
• linux/i2c.h
• linux/swab.h
• linux/vmalloc.h
• ddbridge.h
• ddbridge-regs.h
• ddbridge-io.h
• ddbridge-mci.h
• ddbridge-max.h
• mxl5xx.h

Detected Declarations

• function lnb_command
• function max_send_master_cmd
• function lnb_send_diseqc
• function lnb_set_sat
• function lnb_set_tone
• function lnb_set_voltage
• function max_set_input_unlocked
• function max_set_tone
• function max_set_voltage
• function max_enable_high_lnb_voltage
• function max_send_burst
• function mxl_fw_read
• function ddb_lnb_init_fmode
• function ddb_fe_attach_mxl5xx
• function ddb_fe_attach_mci

Annotated Snippet

if (old_quattro) {
			if (dvb->tone == SEC_TONE_ON)
				tuner |= 2;
			if (dvb->voltage == SEC_VOLTAGE_18)
				tuner |= 1;
		} else {
			if (dvb->tone == SEC_TONE_ON)
				tuner |= 1;
			if (dvb->voltage == SEC_VOLTAGE_18)
				tuner |= 2;
		}
		res = max_set_input_unlocked(fe, tuner);
		break;
	}
	mutex_unlock(&dev->link[port->lnr].lnb.lock);
	return res;
}

static int max_set_voltage(struct dvb_frontend *fe, enum fe_sec_voltage voltage)
{
	struct ddb_input *input = fe->sec_priv;
	struct ddb_port *port = input->port;
	struct ddb *dev = port->dev;
	struct ddb_dvb *dvb = &port->dvb[input->nr & 1];
	int tuner = 0;
	u32 nv, ov = dev->link[port->lnr].lnb.voltages;
	int res = 0;
	u32 fmode = dev->link[port->lnr].lnb.fmode;

	mutex_lock(&dev->link[port->lnr].lnb.lock);
	dvb->voltage = voltage;

	switch (fmode) {
	case 3:
	default:
	case 0:
		if (fmode == 3)
			max_set_input_unlocked(fe, 0);
		if (voltage == SEC_VOLTAGE_OFF)
			dev->link[port->lnr].lnb.voltage[dvb->input] &=
				~(1ULL << input->nr);
		else
			dev->link[port->lnr].lnb.voltage[dvb->input] |=
				(1ULL << input->nr);

		res = lnb_set_voltage(dev, port->lnr, dvb->input, voltage);
		break;
	case 1:
	case 2:
		if (voltage == SEC_VOLTAGE_OFF)
			dev->link[port->lnr].lnb.voltages &=
				~(1ULL << input->nr);
		else
			dev->link[port->lnr].lnb.voltages |=
				(1ULL << input->nr);

		nv = dev->link[port->lnr].lnb.voltages;

		if (old_quattro) {
			if (dvb->tone == SEC_TONE_ON)
				tuner |= 2;
			if (dvb->voltage == SEC_VOLTAGE_18)
				tuner |= 1;
		} else {
			if (dvb->tone == SEC_TONE_ON)
				tuner |= 1;
			if (dvb->voltage == SEC_VOLTAGE_18)
				tuner |= 2;
		}
		res = max_set_input_unlocked(fe, tuner);

		if (nv != ov) {
			if (nv) {
				lnb_set_voltage(
					dev, port->lnr,
					0, SEC_VOLTAGE_13);
				if (fmode == 1) {
					lnb_set_voltage(
						dev, port->lnr,
						0, SEC_VOLTAGE_13);
					if (old_quattro) {
						lnb_set_voltage(
							dev, port->lnr,
							1, SEC_VOLTAGE_18);
						lnb_set_voltage(
							dev, port->lnr,
							2, SEC_VOLTAGE_13);
					} else {
						lnb_set_voltage(
							dev, port->lnr,

Annotation

• Immediate include surface: `linux/module.h`, `linux/init.h`, `linux/interrupt.h`, `linux/delay.h`, `linux/slab.h`, `linux/poll.h`, `linux/io.h`, `linux/pci.h`.
• Detected declarations: `function lnb_command`, `function max_send_master_cmd`, `function lnb_send_diseqc`, `function lnb_set_sat`, `function lnb_set_tone`, `function lnb_set_voltage`, `function max_set_input_unlocked`, `function max_set_tone`, `function max_set_voltage`, `function max_enable_high_lnb_voltage`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.