/* Platform configuration */
struct plat_sci_port *cfg;
- /* Port enable callback */
- void (*enable)(struct uart_port *port);
-
- /* Port disable callback */
- void (*disable)(struct uart_port *port);
-
/* Break timer */
struct timer_list break_timer;
int break_flag;
/* Function clock */
struct clk *fclk;
+ char *irqstr[SCIx_NR_IRQS];
+
struct dma_chan *chan_tx;
struct dma_chan *chan_rx;
return 0;
}
+static void sci_port_enable(struct sci_port *sci_port)
+{
+ if (!sci_port->port.dev)
+ return;
+
+ pm_runtime_get_sync(sci_port->port.dev);
+
+ clk_enable(sci_port->iclk);
+ sci_port->port.uartclk = clk_get_rate(sci_port->iclk);
+ clk_enable(sci_port->fclk);
+}
+
+static void sci_port_disable(struct sci_port *sci_port)
+{
+ if (!sci_port->port.dev)
+ return;
+
+ clk_disable(sci_port->fclk);
+ clk_disable(sci_port->iclk);
+
+ pm_runtime_put_sync(sci_port->port.dev);
+}
+
#if defined(CONFIG_CONSOLE_POLL) || defined(CONFIG_SERIAL_SH_SCI_CONSOLE)
#ifdef CONFIG_CONSOLE_POLL
{
struct sci_port *port = (struct sci_port *)data;
- if (port->enable)
- port->enable(&port->port);
+ sci_port_enable(port);
if (sci_rxd_in(&port->port) == 0) {
port->break_flag = 1;
} else
port->break_flag = 0;
- if (port->disable)
- port->disable(&port->port);
+ sci_port_disable(port);
}
static int sci_handle_errors(struct uart_port *port)
{
struct tty_struct *tty = port->state->port.tty;
struct sci_port *s = to_sci_port(port);
+ struct plat_sci_reg *reg;
int copied = 0;
- /*
- * XXX: Technically not limited to non-SCIFs, it's simply the
- * SCLSR check that is for the moment SCIF-specific. This
- * probably wants to be revisited for SCIFA/B as well as for
- * factoring in SCI overrun detection.
- */
- if (port->type != PORT_SCIF)
+ reg = sci_getreg(port, SCLSR);
+ if (!reg->size)
return 0;
if ((sci_in(port, SCLSR) & (1 << s->cfg->overrun_bit))) {
return NOTIFY_OK;
}
-static void sci_clk_enable(struct uart_port *port)
-{
- struct sci_port *sci_port = to_sci_port(port);
-
- pm_runtime_get_sync(port->dev);
+static struct sci_irq_desc {
+ const char *desc;
+ irq_handler_t handler;
+} sci_irq_desc[] = {
+ /*
+ * Split out handlers, the default case.
+ */
+ [SCIx_ERI_IRQ] = {
+ .desc = "rx err",
+ .handler = sci_er_interrupt,
+ },
- clk_enable(sci_port->iclk);
- sci_port->port.uartclk = clk_get_rate(sci_port->iclk);
- clk_enable(sci_port->fclk);
-}
+ [SCIx_RXI_IRQ] = {
+ .desc = "rx full",
+ .handler = sci_rx_interrupt,
+ },
-static void sci_clk_disable(struct uart_port *port)
-{
- struct sci_port *sci_port = to_sci_port(port);
+ [SCIx_TXI_IRQ] = {
+ .desc = "tx empty",
+ .handler = sci_tx_interrupt,
+ },
- clk_disable(sci_port->fclk);
- clk_disable(sci_port->iclk);
+ [SCIx_BRI_IRQ] = {
+ .desc = "break",
+ .handler = sci_br_interrupt,
+ },
- pm_runtime_put_sync(port->dev);
-}
+ /*
+ * Special muxed handler.
+ */
+ [SCIx_MUX_IRQ] = {
+ .desc = "mux",
+ .handler = sci_mpxed_interrupt,
+ },
+};
static int sci_request_irq(struct sci_port *port)
{
- int i;
- irqreturn_t (*handlers[4])(int irq, void *ptr) = {
- sci_er_interrupt, sci_rx_interrupt, sci_tx_interrupt,
- sci_br_interrupt,
- };
- const char *desc[] = { "SCI Receive Error", "SCI Receive Data Full",
- "SCI Transmit Data Empty", "SCI Break" };
-
- if (port->cfg->irqs[0] == port->cfg->irqs[1]) {
- if (unlikely(!port->cfg->irqs[0]))
- return -ENODEV;
-
- 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;
+ struct uart_port *up = &port->port;
+ int i, j, ret = 0;
+
+ for (i = j = 0; i < SCIx_NR_IRQS; i++, j++) {
+ struct sci_irq_desc *desc;
+ unsigned int irq;
+
+ if (SCIx_IRQ_IS_MUXED(port)) {
+ i = SCIx_MUX_IRQ;
+ irq = up->irq;
+ } else
+ irq = port->cfg->irqs[i];
+
+ desc = sci_irq_desc + i;
+ port->irqstr[j] = kasprintf(GFP_KERNEL, "%s:%s",
+ dev_name(up->dev), desc->desc);
+ if (!port->irqstr[j]) {
+ dev_err(up->dev, "Failed to allocate %s IRQ string\n",
+ desc->desc);
+ goto out_nomem;
}
- } else {
- for (i = 0; i < ARRAY_SIZE(handlers); i++) {
- if (unlikely(!port->cfg->irqs[i]))
- continue;
-
- 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;
- }
+
+ ret = request_irq(irq, desc->handler, up->irqflags,
+ port->irqstr[j], port);
+ if (unlikely(ret)) {
+ dev_err(up->dev, "Can't allocate %s IRQ\n", desc->desc);
+ goto out_noirq;
}
}
return 0;
+
+out_noirq:
+ while (--i >= 0)
+ free_irq(port->cfg->irqs[i], port);
+
+out_nomem:
+ while (--j >= 0)
+ kfree(port->irqstr[j]);
+
+ return ret;
}
static void sci_free_irq(struct sci_port *port)
{
int i;
- if (port->cfg->irqs[0] == port->cfg->irqs[1])
- free_irq(port->cfg->irqs[0], port);
- else {
- for (i = 0; i < ARRAY_SIZE(port->cfg->irqs); i++) {
- if (!port->cfg->irqs[i])
- continue;
+ /*
+ * Intentionally in reverse order so we iterate over the muxed
+ * IRQ first.
+ */
+ for (i = 0; i < SCIx_NR_IRQS; i++) {
+ free_irq(port->cfg->irqs[i], port);
+ kfree(port->irqstr[i]);
- free_irq(port->cfg->irqs[i], port);
+ if (SCIx_IRQ_IS_MUXED(port)) {
+ /* If there's only one IRQ, we're done. */
+ return;
}
}
}
dev_dbg(port->dev, "%s(%d)\n", __func__, port->line);
- if (s->enable)
- s->enable(port);
+ sci_port_enable(s);
ret = sci_request_irq(s);
if (unlikely(ret < 0))
sci_free_dma(port);
sci_free_irq(s);
- if (s->disable)
- s->disable(port);
+ sci_port_disable(s);
}
static unsigned int sci_scbrr_calc(unsigned int algo_id, unsigned int bps,
if (likely(baud && port->uartclk))
t = sci_scbrr_calc(s->cfg->scbrr_algo_id, baud, port->uartclk);
- if (s->enable)
- s->enable(port);
+ sci_port_enable(s);
do {
status = sci_in(port, SCxSR);
if ((termios->c_cflag & CREAD) != 0)
sci_start_rx(port);
- if (s->disable)
- s->disable(port);
+ sci_port_disable(s);
}
static const char *sci_type(struct uart_port *port)
struct plat_sci_port *p)
{
struct uart_port *port = &sci_port->port;
+ int ret;
port->ops = &sci_uart_ops;
port->iotype = UPIO_MEM;
break;
}
- if (p->regtype == SCIx_PROBE_REGTYPE)
- BUG_ON(sci_probe_regmap(p) != 0);
+ if (p->regtype == SCIx_PROBE_REGTYPE) {
+ ret = sci_probe_regmap(p);
+ if (unlikely(!ret))
+ return ret;
+ }
if (dev) {
sci_port->iclk = clk_get(&dev->dev, "sci_ick");
if (IS_ERR(sci_port->fclk))
sci_port->fclk = NULL;
- sci_port->enable = sci_clk_enable;
- sci_port->disable = sci_clk_disable;
port->dev = &dev->dev;
pm_runtime_enable(&dev->dev);
* For the muxed case there's nothing more to do.
*/
port->irq = p->irqs[SCIx_RXI_IRQ];
+ port->irqflags = IRQF_DISABLED;
port->serial_in = sci_serial_in;
port->serial_out = sci_serial_out;
struct uart_port *port = &sci_port->port;
unsigned short bits;
- if (sci_port->enable)
- sci_port->enable(port);
+ sci_port_enable(sci_port);
uart_console_write(port, s, count, serial_console_putchar);
while ((sci_in(port, SCxSR) & bits) != bits)
cpu_relax();
- if (sci_port->disable)
- sci_port->disable(port);
+ sci_port_disable(sci_port);
}
static int __devinit serial_console_setup(struct console *co, char *options)
if (unlikely(ret != 0))
return ret;
- if (sci_port->enable)
- sci_port->enable(port);
+ sci_port_enable(sci_port);
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:sh-sci");
+MODULE_AUTHOR("Paul Mundt");
+MODULE_DESCRIPTION("SuperH SCI(F) serial driver");
git.openpandora.org / pandora-kernel.git / blobdiff