static int yenta_set_socket()

in yenta_socket.c [330:403]

• 62 lines of code
• 19 McCabe index (conditional complexity)

static int yenta_set_socket(struct pcmcia_socket *sock, socket_state_t *state)
{
	struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
	u16 bridge;

	/* if powering down: do it immediately */
	if (state->Vcc == 0)
		yenta_set_power(socket, state);

	socket->io_irq = state->io_irq;
	bridge = config_readw(socket, CB_BRIDGE_CONTROL) & ~(CB_BRIDGE_CRST | CB_BRIDGE_INTR);
	if (cb_readl(socket, CB_SOCKET_STATE) & CB_CBCARD) {
		u8 intr;
		bridge |= (state->flags & SS_RESET) ? CB_BRIDGE_CRST : 0;

		/* ISA interrupt control? */
		intr = exca_readb(socket, I365_INTCTL);
		intr = (intr & ~0xf);
		if (!socket->dev->irq) {
			intr |= socket->cb_irq ? socket->cb_irq : state->io_irq;
			bridge |= CB_BRIDGE_INTR;
		}
		exca_writeb(socket, I365_INTCTL, intr);
	}  else {
		u8 reg;

		reg = exca_readb(socket, I365_INTCTL) & (I365_RING_ENA | I365_INTR_ENA);
		reg |= (state->flags & SS_RESET) ? 0 : I365_PC_RESET;
		reg |= (state->flags & SS_IOCARD) ? I365_PC_IOCARD : 0;
		if (state->io_irq != socket->dev->irq) {
			reg |= state->io_irq;
			bridge |= CB_BRIDGE_INTR;
		}
		exca_writeb(socket, I365_INTCTL, reg);

		reg = exca_readb(socket, I365_POWER) & (I365_VCC_MASK|I365_VPP1_MASK);
		reg |= I365_PWR_NORESET;
		if (state->flags & SS_PWR_AUTO)
			reg |= I365_PWR_AUTO;
		if (state->flags & SS_OUTPUT_ENA)
			reg |= I365_PWR_OUT;
		if (exca_readb(socket, I365_POWER) != reg)
			exca_writeb(socket, I365_POWER, reg);

		/* CSC interrupt: no ISA irq for CSC */
		reg = exca_readb(socket, I365_CSCINT);
		reg &= I365_CSC_IRQ_MASK;
		reg |= I365_CSC_DETECT;
		if (state->flags & SS_IOCARD) {
			if (state->csc_mask & SS_STSCHG)
				reg |= I365_CSC_STSCHG;
		} else {
			if (state->csc_mask & SS_BATDEAD)
				reg |= I365_CSC_BVD1;
			if (state->csc_mask & SS_BATWARN)
				reg |= I365_CSC_BVD2;
			if (state->csc_mask & SS_READY)
				reg |= I365_CSC_READY;
		}
		exca_writeb(socket, I365_CSCINT, reg);
		exca_readb(socket, I365_CSC);
		if (sock->zoom_video)
			sock->zoom_video(sock, state->flags & SS_ZVCARD);
	}
	config_writew(socket, CB_BRIDGE_CONTROL, bridge);
	/* Socket event mask: get card insert/remove events.. */
	cb_writel(socket, CB_SOCKET_EVENT, -1);
	cb_writel(socket, CB_SOCKET_MASK, CB_CDMASK);

	/* if powering up: do it as the last step when the socket is configured */
	if (state->Vcc != 0)
		yenta_set_power(socket, state);
	return 0;
}