serial: sh-sci: Generalize overrun handling.
This consolidates all of the broken out overrun handling and ensures that
we have sensible defaults per-port type, in addition to making sure that
overruns are flagged appropriately in the error mask for parts that
haven't explicitly disabled support for it.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/include/linux/serial_sci.h b/include/linux/serial_sci.h
index a2afc9f..5fac3bc 100644
--- a/include/linux/serial_sci.h
+++ b/include/linux/serial_sci.h
@@ -8,6 +8,8 @@
* Generic header for SuperH SCI(F) (used by sh/sh64/h8300 and related parts)
*/
+#define SCIx_NOT_SUPPORTED (-1)
+
enum {
SCBRR_ALGO_1, /* ((clk + 16 * bps) / (16 * bps) - 1) */
SCBRR_ALGO_2, /* ((clk + 16 * bps) / (32 * bps) - 1) */
@@ -25,6 +27,28 @@
#define SCSCR_CKE1 (1 << 1)
#define SCSCR_CKE0 (1 << 0)
+/* SCxSR SCI */
+#define SCI_TDRE 0x80
+#define SCI_RDRF 0x40
+#define SCI_ORER 0x20
+#define SCI_FER 0x10
+#define SCI_PER 0x08
+#define SCI_TEND 0x04
+
+#define SCI_DEFAULT_ERROR_MASK (SCI_PER | SCI_FER)
+
+/* SCxSR SCIF */
+#define SCIF_ER 0x0080
+#define SCIF_TEND 0x0040
+#define SCIF_TDFE 0x0020
+#define SCIF_BRK 0x0010
+#define SCIF_FER 0x0008
+#define SCIF_PER 0x0004
+#define SCIF_RDF 0x0002
+#define SCIF_DR 0x0001
+
+#define SCIF_DEFAULT_ERROR_MASK (SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK)
+
/* Offsets into the sci_port->irqs array */
enum {
SCIx_ERI_IRQ,
@@ -56,6 +80,12 @@
unsigned int scbrr_algo_id; /* SCBRR calculation algo */
unsigned int scscr; /* SCSCR initialization */
+ /*
+ * Platform overrides if necessary, defaults otherwise.
+ */
+ int overrun_bit;
+ unsigned int error_mask;
+
struct device *dma_dev;
unsigned int dma_slave_tx;