serial: sh-sci: HSCIF support
Adds support for "High Speed Serial Communications Interface with FIFO",
essentially a SCIF with 128-byte FIFOs and more accurate baud rate
generator.
Signed-off-by: Ulrich Hecht <ulrich.hecht@gmail.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
diff --git a/include/linux/serial_sci.h b/include/linux/serial_sci.h
index eb763ad..d340497 100644
--- a/include/linux/serial_sci.h
+++ b/include/linux/serial_sci.h
@@ -5,7 +5,7 @@
#include <linux/sh_dma.h>
/*
- * Generic header for SuperH SCI(F) (used by sh/sh64/h8300 and related parts)
+ * Generic header for SuperH (H)SCI(F) (used by sh/sh64/h8300 and related parts)
*/
#define SCIx_NOT_SUPPORTED (-1)
@@ -16,6 +16,7 @@
SCBRR_ALGO_3, /* (((clk * 2) + 16 * bps) / (16 * bps) - 1) */
SCBRR_ALGO_4, /* (((clk * 2) + 16 * bps) / (32 * bps) - 1) */
SCBRR_ALGO_5, /* (((clk * 1000 / 32) / bps) - 1) */
+ SCBRR_ALGO_6, /* HSCIF variable sample rate algorithm */
};
#define SCSCR_TIE (1 << 7)
@@ -37,7 +38,7 @@
#define SCI_DEFAULT_ERROR_MASK (SCI_PER | SCI_FER)
-/* SCxSR SCIF */
+/* SCxSR SCIF, HSCIF */
#define SCIF_ER 0x0080
#define SCIF_TEND 0x0040
#define SCIF_TDFE 0x0020
@@ -55,6 +56,9 @@
#define SCSPTR_SPB2IO (1 << 1)
#define SCSPTR_SPB2DT (1 << 0)
+/* HSSRR HSCIF */
+#define HSCIF_SRE 0x8000
+
/* Offsets into the sci_port->irqs array */
enum {
SCIx_ERI_IRQ,
@@ -90,6 +94,7 @@
SCIx_SH4_SCIF_NO_SCSPTR_REGTYPE,
SCIx_SH4_SCIF_FIFODATA_REGTYPE,
SCIx_SH7705_SCIF_REGTYPE,
+ SCIx_HSCIF_REGTYPE,
SCIx_NR_REGTYPES,
};
@@ -115,6 +120,7 @@
SCSMR, SCBRR, SCSCR, SCxSR,
SCFCR, SCFDR, SCxTDR, SCxRDR,
SCLSR, SCTFDR, SCRFDR, SCSPTR,
+ HSSRR,
SCIx_NR_REGS,
};
@@ -137,7 +143,7 @@
unsigned long mapbase; /* resource base */
unsigned int irqs[SCIx_NR_IRQS]; /* ERI, RXI, TXI, BRI */
unsigned int gpios[SCIx_NR_FNS]; /* SCK, RXD, TXD, CTS, RTS */
- unsigned int type; /* SCI / SCIF / IRDA */
+ unsigned int type; /* SCI / SCIF / IRDA / HSCIF */
upf_t flags; /* UPF_* flags */
unsigned long capabilities; /* Port features/capabilities */