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26c92f3728
This permits each port to select its own SCBRR calculation algorithm, rather than having it all ifdef'ed in the header. There are presently only 5 different variations that all parts fall under. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
#ifndef __LINUX_SERIAL_SCI_H
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#define __LINUX_SERIAL_SCI_H
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#include <linux/serial_core.h>
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/*
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* Generic header for SuperH SCI(F) (used by sh/sh64/h8300 and related parts)
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*/
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enum {
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SCBRR_ALGO_1, /* ((clk + 16 * bps) / (16 * bps) - 1) */
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SCBRR_ALGO_2, /* ((clk + 16 * bps) / (32 * bps) - 1) */
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SCBRR_ALGO_3, /* (((clk * 2) + 16 * bps) / (16 * bps) - 1) */
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SCBRR_ALGO_4, /* (((clk * 2) + 16 * bps) / (32 * bps) - 1) */
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SCBRR_ALGO_5, /* (((clk * 1000 / 32) / bps) - 1) */
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};
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#define SCSCR_TIE (1 << 7)
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#define SCSCR_RIE (1 << 6)
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#define SCSCR_TE (1 << 5)
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#define SCSCR_RE (1 << 4)
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#define SCSCR_REIE (1 << 3)
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#define SCSCR_TOIE (1 << 2) /* not supported by all parts */
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#define SCSCR_CKE1 (1 << 1)
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#define SCSCR_CKE0 (1 << 0)
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/* Offsets into the sci_port->irqs array */
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enum {
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SCIx_ERI_IRQ,
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SCIx_RXI_IRQ,
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SCIx_TXI_IRQ,
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SCIx_BRI_IRQ,
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SCIx_NR_IRQS,
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};
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/*
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* Platform device specific platform_data struct
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*/
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struct plat_sci_port {
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void __iomem *membase; /* io cookie */
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unsigned long mapbase; /* resource base */
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unsigned int irqs[SCIx_NR_IRQS]; /* ERI, RXI, TXI, BRI */
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unsigned int type; /* SCI / SCIF / IRDA */
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upf_t flags; /* UPF_* flags */
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char *clk; /* clock string */
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unsigned int scbrr_algo_id; /* SCBRR calculation algo */
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unsigned int scscr; /* SCSCR initialization */
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};
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#endif /* __LINUX_SERIAL_SCI_H */
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