root/include/linux/serial_sci.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __LINUX_SERIAL_SCI_H
   3 #define __LINUX_SERIAL_SCI_H
   4 
   5 #include <linux/bitops.h>
   6 #include <linux/serial_core.h>
   7 #include <linux/sh_dma.h>
   8 
   9 /*
  10  * Generic header for SuperH (H)SCI(F) (used by sh/sh64 and related parts)
  11  */
  12 
  13 /* Serial Control Register (@ = not supported by all parts) */
  14 #define SCSCR_TIE       BIT(7)  /* Transmit Interrupt Enable */
  15 #define SCSCR_RIE       BIT(6)  /* Receive Interrupt Enable */
  16 #define SCSCR_TE        BIT(5)  /* Transmit Enable */
  17 #define SCSCR_RE        BIT(4)  /* Receive Enable */
  18 #define SCSCR_REIE      BIT(3)  /* Receive Error Interrupt Enable @ */
  19 #define SCSCR_TOIE      BIT(2)  /* Timeout Interrupt Enable @ */
  20 #define SCSCR_CKE1      BIT(1)  /* Clock Enable 1 */
  21 #define SCSCR_CKE0      BIT(0)  /* Clock Enable 0 */
  22 
  23 
  24 enum {
  25         SCIx_PROBE_REGTYPE,
  26 
  27         SCIx_SCI_REGTYPE,
  28         SCIx_IRDA_REGTYPE,
  29         SCIx_SCIFA_REGTYPE,
  30         SCIx_SCIFB_REGTYPE,
  31         SCIx_SH2_SCIF_FIFODATA_REGTYPE,
  32         SCIx_SH3_SCIF_REGTYPE,
  33         SCIx_SH4_SCIF_REGTYPE,
  34         SCIx_SH4_SCIF_BRG_REGTYPE,
  35         SCIx_SH4_SCIF_NO_SCSPTR_REGTYPE,
  36         SCIx_SH4_SCIF_FIFODATA_REGTYPE,
  37         SCIx_SH7705_SCIF_REGTYPE,
  38         SCIx_HSCIF_REGTYPE,
  39         SCIx_RZ_SCIFA_REGTYPE,
  40 
  41         SCIx_NR_REGTYPES,
  42 };
  43 
  44 struct plat_sci_port_ops {
  45         void (*init_pins)(struct uart_port *, unsigned int cflag);
  46 };
  47 
  48 /*
  49  * Platform device specific platform_data struct
  50  */
  51 struct plat_sci_port {
  52         unsigned int    type;                   /* SCI / SCIF / IRDA / HSCIF */
  53         upf_t           flags;                  /* UPF_* flags */
  54 
  55         unsigned int    sampling_rate;
  56         unsigned int    scscr;                  /* SCSCR initialization */
  57 
  58         /*
  59          * Platform overrides if necessary, defaults otherwise.
  60          */
  61         unsigned char   regtype;
  62 
  63         struct plat_sci_port_ops        *ops;
  64 };
  65 
  66 #endif /* __LINUX_SERIAL_SCI_H */