serial: sh-sci: Consolidate port definition structures.

Presently the port defs are lamely copied around between competing data
structures (one platform facing, the other driver internal). As we pretty
much require all of the data from the platform facing structure within
the driver too, simply nest the pointer directly and kill off the
duplication.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

drivers/serial/sh-sci.c

@@ -65,11 +65,8 @@
 struct sci_port {
 	struct uart_port	port;
 
-	/* Port type */
-	unsigned int		type;
-
-	/* Port IRQs: ERI, RXI, TXI, BRI (optional) */
-	unsigned int		irqs[SCIx_NR_IRQS];
+	/* Platform configuration */
+	struct plat_sci_port	*cfg;
 
 	/* Port enable callback */
 	void			(*enable)(struct uart_port *port);
@@ -81,12 +78,6 @@ struct sci_port {
 	struct timer_list	break_timer;
 	int			break_flag;
 
-	/* SCSCR initialization */
-	unsigned int		scscr;
-
-	/* SCBRR calculation algo */
-	unsigned int		scbrr_algo_id;
-
 	/* Interface clock */
 	struct clk		*iclk;
 	/* Function clock */
@@ -98,9 +89,6 @@ struct sci_port {
 	struct dma_chan			*chan_rx;
 
 #ifdef CONFIG_SERIAL_SH_SCI_DMA
-	struct device			*dma_dev;
-	unsigned int			slave_tx;
-	unsigned int			slave_rx;
 	struct dma_async_tx_descriptor	*desc_tx;
 	struct dma_async_tx_descriptor	*desc_rx[2];
 	dma_cookie_t			cookie_tx;
@@ -794,7 +782,7 @@ static inline unsigned long port_rx_irq_mask(struct uart_port *port)
 	 * it's unset, it's logically inferred that there's no point in
 	 * testing for it.
 	 */
-	return SCSCR_RIE | (to_sci_port(port)->scscr & SCSCR_REIE);
+	return SCSCR_RIE | (to_sci_port(port)->cfg->scscr & SCSCR_REIE);
 }
 
 static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
@@ -882,21 +870,21 @@ static int sci_request_irq(struct sci_port *port)
 	const char *desc[] = { "SCI Receive Error", "SCI Receive Data Full",
 			       "SCI Transmit Data Empty", "SCI Break" };
 
-	if (port->irqs[0] == port->irqs[1]) {
-		if (unlikely(!port->irqs[0]))
+	if (port->cfg->irqs[0] == port->cfg->irqs[1]) {
+		if (unlikely(!port->cfg->irqs[0]))
 			return -ENODEV;
 
-		if (request_irq(port->irqs[0], sci_mpxed_interrupt,
+		if (request_irq(port->cfg->irqs[0], sci_mpxed_interrupt,
 				IRQF_DISABLED, "sci", port)) {
 			dev_err(port->port.dev, "Can't allocate IRQ\n");
 			return -ENODEV;
 		}
 	} else {
 		for (i = 0; i < ARRAY_SIZE(handlers); i++) {
-			if (unlikely(!port->irqs[i]))
+			if (unlikely(!port->cfg->irqs[i]))
 				continue;
 
-			if (request_irq(port->irqs[i], handlers[i],
+			if (request_irq(port->cfg->irqs[i], handlers[i],
 					IRQF_DISABLED, desc[i], port)) {
 				dev_err(port->port.dev, "Can't allocate IRQ\n");
 				return -ENODEV;
@@ -911,14 +899,14 @@ static void sci_free_irq(struct sci_port *port)
 {
 	int i;
 
-	if (port->irqs[0] == port->irqs[1])
-		free_irq(port->irqs[0], port);
+	if (port->cfg->irqs[0] == port->cfg->irqs[1])
+		free_irq(port->cfg->irqs[0], port);
 	else {
-		for (i = 0; i < ARRAY_SIZE(port->irqs); i++) {
-			if (!port->irqs[i])
+		for (i = 0; i < ARRAY_SIZE(port->cfg->irqs); i++) {
+			if (!port->cfg->irqs[i])
 				continue;
 
-			free_irq(port->irqs[i], port);
+			free_irq(port->cfg->irqs[i], port);
 		}
 	}
 }
@@ -1325,7 +1313,7 @@ static void rx_timer_fn(unsigned long arg)
 
 	if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
 		scr &= ~0x4000;
-		enable_irq(s->irqs[1]);
+		enable_irq(s->cfg->irqs[1]);
 	}
 	sci_out(port, SCSCR, scr | SCSCR_RIE);
 	dev_dbg(port->dev, "DMA Rx timed out\n");
@@ -1341,9 +1329,9 @@ static void sci_request_dma(struct uart_port *port)
 	int nent;
 
 	dev_dbg(port->dev, "%s: port %d DMA %p\n", __func__,
-		port->line, s->dma_dev);
+		port->line, s->cfg->dma_dev);
 
-	if (!s->dma_dev)
+	if (!s->cfg->dma_dev)
 		return;
 
 	dma_cap_zero(mask);
@@ -1352,8 +1340,8 @@ static void sci_request_dma(struct uart_port *port)
 	param = &s->param_tx;
 
 	/* Slave ID, e.g., SHDMA_SLAVE_SCIF0_TX */
-	param->slave_id = s->slave_tx;
-	param->dma_dev = s->dma_dev;
+	param->slave_id = s->cfg->dma_slave_tx;
+	param->dma_dev = s->cfg->dma_dev;
 
 	s->cookie_tx = -EINVAL;
 	chan = dma_request_channel(mask, filter, param);
@@ -1381,8 +1369,8 @@ static void sci_request_dma(struct uart_port *port)
 	param = &s->param_rx;
 
 	/* Slave ID, e.g., SHDMA_SLAVE_SCIF0_RX */
-	param->slave_id = s->slave_rx;
-	param->dma_dev = s->dma_dev;
+	param->slave_id = s->cfg->dma_slave_rx;
+	param->dma_dev = s->cfg->dma_dev;
 
 	chan = dma_request_channel(mask, filter, param);
 	dev_dbg(port->dev, "%s: RX: got channel %p\n", __func__, chan);
@@ -1427,7 +1415,7 @@ static void sci_free_dma(struct uart_port *port)
 {
 	struct sci_port *s = to_sci_port(port);
 
-	if (!s->dma_dev)
+	if (!s->cfg->dma_dev)
 		return;
 
 	if (s->chan_tx)
@@ -1514,7 +1502,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 
 	baud = uart_get_baud_rate(port, termios, old, 0, max_baud);
 	if (likely(baud && port->uartclk))
-		t = sci_scbrr_calc(s->scbrr_algo_id, baud, port->uartclk);
+		t = sci_scbrr_calc(s->cfg->scbrr_algo_id, baud, port->uartclk);
 
 	do {
 		status = sci_in(port, SCxSR);
@@ -1540,7 +1528,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 	sci_out(port, SCSMR, smr_val);
 
 	dev_dbg(port->dev, "%s: SMR %x, t %x, SCSCR %x\n", __func__, smr_val, t,
-		s->scscr);
+		s->cfg->scscr);
 
 	if (t > 0) {
 		if (t >= 256) {
@@ -1556,7 +1544,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 	sci_init_pins(port, termios->c_cflag);
 	sci_out(port, SCFCR, scfcr | ((termios->c_cflag & CRTSCTS) ? SCFCR_MCE : 0));
 
-	sci_out(port, SCSCR, s->scscr);
+	sci_out(port, SCSCR, s->cfg->scscr);
 
 #ifdef CONFIG_SERIAL_SH_SCI_DMA
 	/*
@@ -1617,7 +1605,7 @@ static void sci_config_port(struct uart_port *port, int flags)
 {
 	struct sci_port *s = to_sci_port(port);
 
-	port->type = s->type;
+	port->type = s->cfg->type;
 
 	if (port->flags & UPF_IOREMAP) {
 		port->membase = ioremap_nocache(port->mapbase, 0x40);
@@ -1638,7 +1626,7 @@ static int sci_verify_port(struct uart_port *port, struct serial_struct *ser)
 {
 	struct sci_port *s = to_sci_port(port);
 
-	if (ser->irq != s->irqs[SCIx_TXI_IRQ] || ser->irq > nr_irqs)
+	if (ser->irq != s->cfg->irqs[SCIx_TXI_IRQ] || ser->irq > nr_irqs)
 		return -EINVAL;
 	if (ser->baud_base < 2400)
 		/* No paper tape reader for Mitch.. */
@@ -1723,24 +1711,27 @@ static int __devinit sci_init_single(struct platform_device *dev,
 	sci_port->break_timer.function = sci_break_timer;
 	init_timer(&sci_port->break_timer);
 
-	port->mapbase	= p->mapbase;
+	sci_port->cfg		= p;
 
-	port->irq		= p->irqs[SCIx_TXI_IRQ];
+	port->mapbase		= p->mapbase;
+	port->type		= p->type;
 	port->flags		= p->flags;
-	sci_port->type		= port->type = p->type;
-	sci_port->scscr		= p->scscr;
-	sci_port->scbrr_algo_id	= p->scbrr_algo_id;
 
-#ifdef CONFIG_SERIAL_SH_SCI_DMA
-	sci_port->dma_dev	= p->dma_dev;
-	sci_port->slave_tx	= p->dma_slave_tx;
-	sci_port->slave_rx	= p->dma_slave_rx;
+	/*
+	 * The UART port needs an IRQ value, so we peg this to the TX IRQ
+	 * for the multi-IRQ ports, which is where we are primarily
+	 * concerned with the shutdown path synchronization.
+	 *
+	 * For the muxed case there's nothing more to do.
+	 */
+	port->irq		= p->irqs[SCIx_TXI_IRQ];
 
-	dev_dbg(port->dev, "%s: DMA device %p, tx %d, rx %d\n", __func__,
-		p->dma_dev, p->dma_slave_tx, p->dma_slave_rx);
+#ifdef CONFIG_SERIAL_SH_SCI_DMA
+	if (p->dma_dev)
+		dev_dbg(port->dev, "DMA device %p, tx %d, rx %d\n",
+			p->dma_dev, p->dma_slave_tx, p->dma_slave_rx);
 #endif
 
-	memcpy(&sci_port->irqs, &p->irqs, sizeof(p->irqs));
 	return 0;
 }