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serial: sh-sci: HSCIF support

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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>
This commit is contained in:
Ulrich Hecht 2013-05-31 17:57:01 +02:00 • committed by Simon Horman
parent 018222f5d3
commit f303b364b4
3 changed files with 106 additions and 11 deletions
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12
include/linux/serial_sci.h
View file

@ -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 @@ enum {
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 @@ enum {
#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 @@ enum {
#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 @@ enum {
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 @@ enum {
SCSMR, SCBRR, SCSCR, SCxSR,
SCFCR, SCFDR, SCxTDR, SCxRDR,
SCLSR, SCTFDR, SCRFDR, SCSPTR,
HSSRR,
SCIx_NR_REGS,
};
@ -137,7 +143,7 @@ struct plat_sci_port {
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 */