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 and related parts)
11 #define SCIx_NOT_SUPPORTED (-1)
16 SCBRR_ALGO_1, /* ((clk + 16 * bps) / (16 * bps) - 1) */
17 SCBRR_ALGO_2, /* ((clk + 16 * bps) / (32 * bps) - 1) */
18 SCBRR_ALGO_3, /* (((clk * 2) + 16 * bps) / (16 * bps) - 1) */
19 SCBRR_ALGO_4, /* (((clk * 2) + 16 * bps) / (32 * bps) - 1) */
20 SCBRR_ALGO_5, /* (((clk * 1000 / 32) / bps) - 1) */
21 SCBRR_ALGO_6, /* HSCIF variable sample rate algorithm */
26 #define SCSCR_TIE (1 << 7)
27 #define SCSCR_RIE (1 << 6)
28 #define SCSCR_TE (1 << 5)
29 #define SCSCR_RE (1 << 4)
30 #define SCSCR_REIE (1 << 3) /* not supported by all parts */
31 #define SCSCR_TOIE (1 << 2) /* not supported by all parts */
32 #define SCSCR_CKE1 (1 << 1)
33 #define SCSCR_CKE0 (1 << 0)
43 #define SCI_DEFAULT_ERROR_MASK (SCI_PER | SCI_FER)
45 /* SCxSR SCIF, HSCIF */
46 #define SCIF_ER 0x0080
47 #define SCIF_TEND 0x0040
48 #define SCIF_TDFE 0x0020
49 #define SCIF_BRK 0x0010
50 #define SCIF_FER 0x0008
51 #define SCIF_PER 0x0004
52 #define SCIF_RDF 0x0002
53 #define SCIF_DR 0x0001
55 #define SCIF_DEFAULT_ERROR_MASK (SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK)
57 /* SCSPTR, optional */
58 #define SCSPTR_RTSIO (1 << 7)
59 #define SCSPTR_CTSIO (1 << 5)
60 #define SCSPTR_SPB2IO (1 << 1)
61 #define SCSPTR_SPB2DT (1 << 0)
64 #define HSCIF_SRE 0x8000
66 /* Offsets into the sci_port->irqs array */
74 SCIx_MUX_IRQ = SCIx_NR_IRQS, /* special case */
77 /* Offsets into the sci_port->gpios array */
95 SCIx_SH2_SCIF_FIFODATA_REGTYPE,
96 SCIx_SH3_SCIF_REGTYPE,
97 SCIx_SH4_SCIF_REGTYPE,
98 SCIx_SH4_SCIF_NO_SCSPTR_REGTYPE,
99 SCIx_SH4_SCIF_FIFODATA_REGTYPE,
100 SCIx_SH7705_SCIF_REGTYPE,
106 #define SCIx_IRQ_MUXED(irq) \
108 [SCIx_ERI_IRQ] = (irq), \
109 [SCIx_RXI_IRQ] = (irq), \
110 [SCIx_TXI_IRQ] = (irq), \
111 [SCIx_BRI_IRQ] = (irq), \
114 #define SCIx_IRQ_IS_MUXED(port) \
115 ((port)->cfg->irqs[SCIx_ERI_IRQ] == \
116 (port)->cfg->irqs[SCIx_RXI_IRQ]) || \
117 ((port)->cfg->irqs[SCIx_ERI_IRQ] && \
118 !(port)->cfg->irqs[SCIx_RXI_IRQ])
120 * SCI register subset common for all port types.
121 * Not all registers will exist on all parts.
124 SCSMR, SCBRR, SCSCR, SCxSR,
125 SCFCR, SCFDR, SCxTDR, SCxRDR,
126 SCLSR, SCTFDR, SCRFDR, SCSPTR,
134 struct plat_sci_port_ops {
135 void (*init_pins)(struct uart_port *, unsigned int cflag);
139 * Port-specific capabilities
141 #define SCIx_HAVE_RTSCTS (1 << 0)
144 * Platform device specific platform_data struct
146 struct plat_sci_port {
147 unsigned long mapbase; /* resource base */
148 unsigned int irqs[SCIx_NR_IRQS]; /* ERI, RXI, TXI, BRI */
149 unsigned int gpios[SCIx_NR_FNS]; /* SCK, RXD, TXD, CTS, RTS */
150 unsigned int type; /* SCI / SCIF / IRDA / HSCIF */
151 upf_t flags; /* UPF_* flags */
152 unsigned long capabilities; /* Port features/capabilities */
154 unsigned int scbrr_algo_id; /* SCBRR calculation algo */
155 unsigned int scscr; /* SCSCR initialization */
158 * Platform overrides if necessary, defaults otherwise.
161 unsigned int error_mask;
164 unsigned char regshift;
165 unsigned char regtype;
167 struct plat_sci_port_ops *ops;
169 unsigned int dma_slave_tx;
170 unsigned int dma_slave_rx;
173 #endif /* __LINUX_SERIAL_SCI_H */