1 #include <linux/bitops.h>
2 #include <linux/serial_core.h>
4 #include <linux/gpio.h>
7 #define SCI_MINOR_START 8
11 * SCI register subset common for all port types.
12 * Not all registers will exist on all parts.
15 SCSMR, /* Serial Mode Register */
16 SCBRR, /* Bit Rate Register */
17 SCSCR, /* Serial Control Register */
18 SCxSR, /* Serial Status Register */
19 SCFCR, /* FIFO Control Register */
20 SCFDR, /* FIFO Data Count Register */
21 SCxTDR, /* Transmit (FIFO) Data Register */
22 SCxRDR, /* Receive (FIFO) Data Register */
23 SCLSR, /* Line Status Register */
24 SCTFDR, /* Transmit FIFO Data Count Register */
25 SCRFDR, /* Receive FIFO Data Count Register */
26 SCSPTR, /* Serial Port Register */
27 HSSRR, /* Sampling Rate Register */
28 SCPCR, /* Serial Port Control Register */
29 SCPDR, /* Serial Port Data Register */
30 SCDL, /* BRG Frequency Division Register */
31 SCCKS, /* BRG Clock Select Register */
37 /* SCSMR (Serial Mode Register) */
38 #define SCSMR_C_A BIT(7) /* Communication Mode */
39 #define SCSMR_CSYNC BIT(7) /* - Clocked synchronous mode */
40 #define SCSMR_ASYNC 0 /* - Asynchronous mode */
41 #define SCSMR_CHR BIT(6) /* 7-bit Character Length */
42 #define SCSMR_PE BIT(5) /* Parity Enable */
43 #define SCSMR_ODD BIT(4) /* Odd Parity */
44 #define SCSMR_STOP BIT(3) /* Stop Bit Length */
45 #define SCSMR_CKS 0x0003 /* Clock Select */
47 /* Serial Mode Register, SCIFA/SCIFB only bits */
48 #define SCSMR_CKEDG BIT(12) /* Transmit/Receive Clock Edge Select */
49 #define SCSMR_SRC_MASK 0x0700 /* Sampling Control */
50 #define SCSMR_SRC_16 0x0000 /* Sampling rate 1/16 */
51 #define SCSMR_SRC_5 0x0100 /* Sampling rate 1/5 */
52 #define SCSMR_SRC_7 0x0200 /* Sampling rate 1/7 */
53 #define SCSMR_SRC_11 0x0300 /* Sampling rate 1/11 */
54 #define SCSMR_SRC_13 0x0400 /* Sampling rate 1/13 */
55 #define SCSMR_SRC_17 0x0500 /* Sampling rate 1/17 */
56 #define SCSMR_SRC_19 0x0600 /* Sampling rate 1/19 */
57 #define SCSMR_SRC_27 0x0700 /* Sampling rate 1/27 */
59 /* Serial Control Register, SCIFA/SCIFB only bits */
60 #define SCSCR_TDRQE BIT(15) /* Tx Data Transfer Request Enable */
61 #define SCSCR_RDRQE BIT(14) /* Rx Data Transfer Request Enable */
63 /* SCxSR (Serial Status Register) on SCI */
64 #define SCI_TDRE BIT(7) /* Transmit Data Register Empty */
65 #define SCI_RDRF BIT(6) /* Receive Data Register Full */
66 #define SCI_ORER BIT(5) /* Overrun Error */
67 #define SCI_FER BIT(4) /* Framing Error */
68 #define SCI_PER BIT(3) /* Parity Error */
69 #define SCI_TEND BIT(2) /* Transmit End */
70 #define SCI_RESERVED 0x03 /* All reserved bits */
72 #define SCI_DEFAULT_ERROR_MASK (SCI_PER | SCI_FER)
74 #define SCI_RDxF_CLEAR (u32)(~(SCI_RESERVED | SCI_RDRF))
75 #define SCI_ERROR_CLEAR (u32)(~(SCI_RESERVED | SCI_PER | SCI_FER | SCI_ORER))
76 #define SCI_TDxE_CLEAR (u32)(~(SCI_RESERVED | SCI_TEND | SCI_TDRE))
77 #define SCI_BREAK_CLEAR (u32)(~(SCI_RESERVED | SCI_PER | SCI_FER | SCI_ORER))
79 /* SCxSR (Serial Status Register) on SCIF, SCIFA, SCIFB, HSCIF */
80 #define SCIF_ER BIT(7) /* Receive Error */
81 #define SCIF_TEND BIT(6) /* Transmission End */
82 #define SCIF_TDFE BIT(5) /* Transmit FIFO Data Empty */
83 #define SCIF_BRK BIT(4) /* Break Detect */
84 #define SCIF_FER BIT(3) /* Framing Error */
85 #define SCIF_PER BIT(2) /* Parity Error */
86 #define SCIF_RDF BIT(1) /* Receive FIFO Data Full */
87 #define SCIF_DR BIT(0) /* Receive Data Ready */
88 /* SCIF only (optional) */
89 #define SCIF_PERC 0xf000 /* Number of Parity Errors */
90 #define SCIF_FERC 0x0f00 /* Number of Framing Errors */
91 /*SCIFA/SCIFB and SCIF on SH7705/SH7720/SH7721 only */
92 #define SCIFA_ORER BIT(9) /* Overrun Error */
94 #define SCIF_DEFAULT_ERROR_MASK (SCIF_PER | SCIF_FER | SCIF_BRK | SCIF_ER)
96 #define SCIF_RDxF_CLEAR (u32)(~(SCIF_DR | SCIF_RDF))
97 #define SCIF_ERROR_CLEAR (u32)(~(SCIF_PER | SCIF_FER | SCIF_ER))
98 #define SCIF_TDxE_CLEAR (u32)(~(SCIF_TDFE))
99 #define SCIF_BREAK_CLEAR (u32)(~(SCIF_PER | SCIF_FER | SCIF_BRK))
101 /* SCFCR (FIFO Control Register) */
102 #define SCFCR_MCE BIT(3) /* Modem Control Enable */
103 #define SCFCR_TFRST BIT(2) /* Transmit FIFO Data Register Reset */
104 #define SCFCR_RFRST BIT(1) /* Receive FIFO Data Register Reset */
105 #define SCFCR_LOOP BIT(0) /* Loopback Test */
107 /* SCLSR (Line Status Register) on (H)SCIF */
108 #define SCLSR_TO BIT(2) /* Timeout */
109 #define SCLSR_ORER BIT(0) /* Overrun Error */
111 /* SCSPTR (Serial Port Register), optional */
112 #define SCSPTR_RTSIO BIT(7) /* Serial Port RTS# Pin Input/Output */
113 #define SCSPTR_RTSDT BIT(6) /* Serial Port RTS# Pin Data */
114 #define SCSPTR_CTSIO BIT(5) /* Serial Port CTS# Pin Input/Output */
115 #define SCSPTR_CTSDT BIT(4) /* Serial Port CTS# Pin Data */
116 #define SCSPTR_SCKIO BIT(3) /* Serial Port Clock Pin Input/Output */
117 #define SCSPTR_SCKDT BIT(2) /* Serial Port Clock Pin Data */
118 #define SCSPTR_SPB2IO BIT(1) /* Serial Port Break Input/Output */
119 #define SCSPTR_SPB2DT BIT(0) /* Serial Port Break Data */
122 #define HSCIF_SRE BIT(15) /* Sampling Rate Register Enable */
124 /* SCPCR (Serial Port Control Register), SCIFA/SCIFB only */
125 #define SCPCR_RTSC BIT(4) /* Serial Port RTS# Pin / Output Pin */
126 #define SCPCR_CTSC BIT(3) /* Serial Port CTS# Pin / Input Pin */
127 #define SCPCR_SCKC BIT(2) /* Serial Port SCK Pin / Output Pin */
128 #define SCPCR_RXDC BIT(1) /* Serial Port RXD Pin / Input Pin */
129 #define SCPCR_TXDC BIT(0) /* Serial Port TXD Pin / Output Pin */
131 /* SCPDR (Serial Port Data Register), SCIFA/SCIFB only */
132 #define SCPDR_RTSD BIT(4) /* Serial Port RTS# Output Pin Data */
133 #define SCPDR_CTSD BIT(3) /* Serial Port CTS# Input Pin Data */
134 #define SCPDR_SCKD BIT(2) /* Serial Port SCK Output Pin Data */
135 #define SCPDR_RXDD BIT(1) /* Serial Port RXD Input Pin Data */
136 #define SCPDR_TXDD BIT(0) /* Serial Port TXD Output Pin Data */
139 * BRG Clock Select Register (Some SCIF and HSCIF)
140 * The Baud Rate Generator for external clock can provide a clock source for
141 * the sampling clock. It outputs either its frequency divided clock, or the
142 * (undivided) (H)SCK external clock.
144 #define SCCKS_CKS BIT(15) /* Select (H)SCK (1) or divided SC_CLK (0) */
145 #define SCCKS_XIN BIT(14) /* SC_CLK uses bus clock (1) or SCIF_CLK (0) */
147 #define SCxSR_TEND(port) (((port)->type == PORT_SCI) ? SCI_TEND : SCIF_TEND)
148 #define SCxSR_RDxF(port) (((port)->type == PORT_SCI) ? SCI_RDRF : SCIF_RDF)
149 #define SCxSR_TDxE(port) (((port)->type == PORT_SCI) ? SCI_TDRE : SCIF_TDFE)
150 #define SCxSR_FER(port) (((port)->type == PORT_SCI) ? SCI_FER : SCIF_FER)
151 #define SCxSR_PER(port) (((port)->type == PORT_SCI) ? SCI_PER : SCIF_PER)
152 #define SCxSR_BRK(port) (((port)->type == PORT_SCI) ? 0x00 : SCIF_BRK)
154 #define SCxSR_ERRORS(port) (to_sci_port(port)->error_mask)
156 #define SCxSR_RDxF_CLEAR(port) \
157 (((port)->type == PORT_SCI) ? SCI_RDxF_CLEAR : SCIF_RDxF_CLEAR)
158 #define SCxSR_ERROR_CLEAR(port) \
159 (to_sci_port(port)->error_clear)
160 #define SCxSR_TDxE_CLEAR(port) \
161 (((port)->type == PORT_SCI) ? SCI_TDxE_CLEAR : SCIF_TDxE_CLEAR)
162 #define SCxSR_BREAK_CLEAR(port) \
163 (((port)->type == PORT_SCI) ? SCI_BREAK_CLEAR : SCIF_BREAK_CLEAR)