1 #ifndef __LINUX_SERIAL_SCI_H
2 #define __LINUX_SERIAL_SCI_H
4 #include <linux/serial_core.h>
5 #include <linux/sh_dma.h>
8 * Generic header for SuperH (H)SCI(F) (used by sh/sh64/h8300 and related parts)
11 #define SCIx_NOT_SUPPORTED (-1)
14 SCBRR_ALGO_1
, /* ((clk + 16 * bps) / (16 * bps) - 1) */
15 SCBRR_ALGO_2
, /* ((clk + 16 * bps) / (32 * bps) - 1) */
16 SCBRR_ALGO_3
, /* (((clk * 2) + 16 * bps) / (16 * bps) - 1) */
17 SCBRR_ALGO_4
, /* (((clk * 2) + 16 * bps) / (32 * bps) - 1) */
18 SCBRR_ALGO_5
, /* (((clk * 1000 / 32) / bps) - 1) */
19 SCBRR_ALGO_6
, /* HSCIF variable sample rate algorithm */
22 #define SCSCR_TIE (1 << 7)
23 #define SCSCR_RIE (1 << 6)
24 #define SCSCR_TE (1 << 5)
25 #define SCSCR_RE (1 << 4)
26 #define SCSCR_REIE (1 << 3) /* not supported by all parts */
27 #define SCSCR_TOIE (1 << 2) /* not supported by all parts */
28 #define SCSCR_CKE1 (1 << 1)
29 #define SCSCR_CKE0 (1 << 0)
39 #define SCI_DEFAULT_ERROR_MASK (SCI_PER | SCI_FER)
41 /* SCxSR SCIF, HSCIF */
42 #define SCIF_ER 0x0080
43 #define SCIF_TEND 0x0040
44 #define SCIF_TDFE 0x0020
45 #define SCIF_BRK 0x0010
46 #define SCIF_FER 0x0008
47 #define SCIF_PER 0x0004
48 #define SCIF_RDF 0x0002
49 #define SCIF_DR 0x0001
51 #define SCIF_DEFAULT_ERROR_MASK (SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK)
53 /* SCSPTR, optional */
54 #define SCSPTR_RTSIO (1 << 7)
55 #define SCSPTR_CTSIO (1 << 5)
56 #define SCSPTR_SPB2IO (1 << 1)
57 #define SCSPTR_SPB2DT (1 << 0)
60 #define HSCIF_SRE 0x8000
62 /* Offsets into the sci_port->irqs array */
70 SCIx_MUX_IRQ
= SCIx_NR_IRQS
, /* special case */
73 /* Offsets into the sci_port->gpios array */
91 SCIx_SH2_SCIF_FIFODATA_REGTYPE
,
92 SCIx_SH3_SCIF_REGTYPE
,
93 SCIx_SH4_SCIF_REGTYPE
,
94 SCIx_SH4_SCIF_NO_SCSPTR_REGTYPE
,
95 SCIx_SH4_SCIF_FIFODATA_REGTYPE
,
96 SCIx_SH7705_SCIF_REGTYPE
,
102 #define SCIx_IRQ_MUXED(irq) \
104 [SCIx_ERI_IRQ] = (irq), \
105 [SCIx_RXI_IRQ] = (irq), \
106 [SCIx_TXI_IRQ] = (irq), \
107 [SCIx_BRI_IRQ] = (irq), \
110 #define SCIx_IRQ_IS_MUXED(port) \
111 ((port)->cfg->irqs[SCIx_ERI_IRQ] == \
112 (port)->cfg->irqs[SCIx_RXI_IRQ]) || \
113 ((port)->cfg->irqs[SCIx_ERI_IRQ] && \
114 !(port)->cfg->irqs[SCIx_RXI_IRQ])
116 * SCI register subset common for all port types.
117 * Not all registers will exist on all parts.
120 SCSMR
, SCBRR
, SCSCR
, SCxSR
,
121 SCFCR
, SCFDR
, SCxTDR
, SCxRDR
,
122 SCLSR
, SCTFDR
, SCRFDR
, SCSPTR
,
130 struct plat_sci_port_ops
{
131 void (*init_pins
)(struct uart_port
*, unsigned int cflag
);
135 * Port-specific capabilities
137 #define SCIx_HAVE_RTSCTS (1 << 0)
140 * Platform device specific platform_data struct
142 struct plat_sci_port
{
143 unsigned long mapbase
; /* resource base */
144 unsigned int irqs
[SCIx_NR_IRQS
]; /* ERI, RXI, TXI, BRI */
145 unsigned int gpios
[SCIx_NR_FNS
]; /* SCK, RXD, TXD, CTS, RTS */
146 unsigned int type
; /* SCI / SCIF / IRDA / HSCIF */
147 upf_t flags
; /* UPF_* flags */
148 unsigned long capabilities
; /* Port features/capabilities */
150 unsigned int scbrr_algo_id
; /* SCBRR calculation algo */
151 unsigned int scscr
; /* SCSCR initialization */
154 * Platform overrides if necessary, defaults otherwise.
157 unsigned int error_mask
;
160 unsigned char regshift
;
161 unsigned char regtype
;
163 struct plat_sci_port_ops
*ops
;
165 unsigned int dma_slave_tx
;
166 unsigned int dma_slave_rx
;
169 #endif /* __LINUX_SERIAL_SCI_H */