include/linux/serial_sci.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef __LINUX_SERIAL_SCI_H
0003 #define __LINUX_SERIAL_SCI_H
0004
0005 #include <linux/bitops.h>
0006 #include <linux/serial_core.h>
0007 #include <linux/sh_dma.h>
0008
0009 /*
0010  * Generic header for SuperH (H)SCI(F) (used by sh/sh64 and related parts)
0011  */
0012
0013 /* Serial Control Register (@ = not supported by all parts) */
0014 #define SCSCR_TIE   BIT(7)  /* Transmit Interrupt Enable */
0015 #define SCSCR_RIE   BIT(6)  /* Receive Interrupt Enable */
0016 #define SCSCR_TE    BIT(5)  /* Transmit Enable */
0017 #define SCSCR_RE    BIT(4)  /* Receive Enable */
0018 #define SCSCR_REIE  BIT(3)  /* Receive Error Interrupt Enable @ */
0019 #define SCSCR_TOIE  BIT(2)  /* Timeout Interrupt Enable @ */
0020 #define SCSCR_CKE1  BIT(1)  /* Clock Enable 1 */
0021 #define SCSCR_CKE0  BIT(0)  /* Clock Enable 0 */
0022
0023
0024 enum {
0025     SCIx_PROBE_REGTYPE,
0026
0027     SCIx_SCI_REGTYPE,
0028     SCIx_IRDA_REGTYPE,
0029     SCIx_SCIFA_REGTYPE,
0030     SCIx_SCIFB_REGTYPE,
0031     SCIx_SH2_SCIF_FIFODATA_REGTYPE,
0032     SCIx_SH3_SCIF_REGTYPE,
0033     SCIx_SH4_SCIF_REGTYPE,
0034     SCIx_SH4_SCIF_BRG_REGTYPE,
0035     SCIx_SH4_SCIF_NO_SCSPTR_REGTYPE,
0036     SCIx_SH4_SCIF_FIFODATA_REGTYPE,
0037     SCIx_SH7705_SCIF_REGTYPE,
0038     SCIx_HSCIF_REGTYPE,
0039     SCIx_RZ_SCIFA_REGTYPE,
0040
0041     SCIx_NR_REGTYPES,
0042 };
0043
0044 struct plat_sci_port_ops {
0045     void (*init_pins)(struct uart_port *, unsigned int cflag);
0046 };
0047
0048 /*
0049  * Platform device specific platform_data struct
0050  */
0051 struct plat_sci_port {
0052     unsigned int    type;           /* SCI / SCIF / IRDA / HSCIF */
0053     upf_t       flags;          /* UPF_* flags */
0054
0055     unsigned int    sampling_rate;
0056     unsigned int    scscr;          /* SCSCR initialization */
0057
0058     /*
0059      * Platform overrides if necessary, defaults otherwise.
0060      */
0061     unsigned char   regtype;
0062
0063     struct plat_sci_port_ops    *ops;
0064 };
0065
0066 #endif /* __LINUX_SERIAL_SCI_H */