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serial: sh-sci: Generalize overrun handling.

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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>
This commit is contained in:
Paul Mundt 2011-06-08 18:19:37 +09:00
parent b030340161
commit debf950716
3 changed files with 77 additions and 56 deletions
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30
include/linux/serial_sci.h
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@ -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 @@ enum {
#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 @@ struct plat_sci_port {
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;