diff options
Diffstat (limited to 'drivers/serial/serial_sh.c')
| -rw-r--r-- | drivers/serial/serial_sh.c | 200 |
1 files changed, 73 insertions, 127 deletions
diff --git a/drivers/serial/serial_sh.c b/drivers/serial/serial_sh.c index 0103a2918..fcf69abd2 100644 --- a/drivers/serial/serial_sh.c +++ b/drivers/serial/serial_sh.c @@ -1,6 +1,7 @@ /* * SuperH SCIF device driver. - * Copyright (c) 2007,2008 Nobuhiro Iwamatsu + * Copyright (C) 2007,2008,2010 Nobuhiro Iwamatsu + * Copyright (C) 2002 - 2008 Paul Mundt * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -20,8 +21,7 @@ #include <common.h> #include <asm/io.h> #include <asm/processor.h> - -DECLARE_GLOBAL_DATA_PTR; +#include "serial_sh.h" #if defined(CONFIG_CONS_SCIF0) # define SCIF_BASE SCIF0_BASE @@ -39,139 +39,88 @@ DECLARE_GLOBAL_DATA_PTR; # error "Default SCIF doesn't set....." #endif -/* Base register */ -#define SCSMR (vu_short *)(SCIF_BASE + 0x0) -#define SCBRR (vu_char *)(SCIF_BASE + 0x4) -#define SCSCR (vu_short *)(SCIF_BASE + 0x8) -#define SCFCR (vu_short *)(SCIF_BASE + 0x18) -#define SCFDR (vu_short *)(SCIF_BASE + 0x1C) -#if defined(CONFIG_CPU_SH7720) || \ - (defined(CONFIG_CPU_SH7723) && defined(CONFIG_SCIF_A)) -# define SCFSR (vu_short *)(SCIF_BASE + 0x14) /* SCSSR */ -# define SCFTDR (vu_char *)(SCIF_BASE + 0x20) -# define SCFRDR (vu_char *)(SCIF_BASE + 0x24) +#if defined(CONFIG_SCIF_A) + #define SCIF_BASE_PORT PORT_SCIFA #else -# define SCFTDR (vu_char *)(SCIF_BASE + 0xC) -# define SCFSR (vu_short *)(SCIF_BASE + 0x10) -# define SCFRDR (vu_char *)(SCIF_BASE + 0x14) + #define SCIF_BASE_PORT PORT_SCIF #endif -#if defined(CONFIG_CPU_SH7780) || \ - defined(CONFIG_CPU_SH7785) -# define SCRFDR (vu_short *)(SCIF_BASE + 0x20) -# define SCSPTR (vu_short *)(SCIF_BASE + 0x24) -# define SCLSR (vu_short *)(SCIF_BASE + 0x28) -# define SCRER (vu_short *)(SCIF_BASE + 0x2C) -# define LSR_ORER 1 -# define FIFOLEVEL_MASK 0xFF -#elif defined(CONFIG_CPU_SH7763) -# if defined(CONFIG_CONS_SCIF2) -# define SCSPTR (vu_short *)(SCIF_BASE + 0x20) -# define SCLSR (vu_short *)(SCIF_BASE + 0x24) -# define LSR_ORER 1 -# define FIFOLEVEL_MASK 0x1F -# else -# define SCRFDR (vu_short *)(SCIF_BASE + 0x20) -# define SCSPTR (vu_short *)(SCIF_BASE + 0x24) -# define SCLSR (vu_short *)(SCIF_BASE + 0x28) -# define SCRER (vu_short *)(SCIF_BASE + 0x2C) -# define LSR_ORER 1 -# define FIFOLEVEL_MASK 0xFF -# endif -#elif defined(CONFIG_CPU_SH7723) -# if defined(CONFIG_SCIF_A) -# define SCLSR SCFSR -# define LSR_ORER 0x0200 -# define FIFOLEVEL_MASK 0x3F -#else -# define SCLSR (vu_short *)(SCIF_BASE + 0x24) -# define LSR_ORER 1 -# define FIFOLEVEL_MASK 0x1F -#endif -#elif defined(CONFIG_CPU_SH7750) || \ - defined(CONFIG_CPU_SH7751) || \ - defined(CONFIG_CPU_SH7722) || \ - defined(CONFIG_CPU_SH7203) -# define SCSPTR (vu_short *)(SCIF_BASE + 0x20) -# define SCLSR (vu_short *)(SCIF_BASE + 0x24) -# define LSR_ORER 1 -# define FIFOLEVEL_MASK 0x1F -#elif defined(CONFIG_CPU_SH7720) -# define SCLSR SCFSR -# define LSR_ORER 0x0200 -# define FIFOLEVEL_MASK 0x1F -#elif defined(CONFIG_CPU_SH7710) || \ - defined(CONFIG_CPU_SH7712) -# define SCLSR SCFSR /* SCSSR */ -# define LSR_ORER 1 -# define FIFOLEVEL_MASK 0x1F -#endif - -/* SCBRR register value setting */ -#if defined(CONFIG_CPU_SH7720) -# define SCBRR_VALUE(bps, clk) (((clk * 2) + 16 * bps) / (32 * bps) - 1) -#elif defined(CONFIG_CPU_SH7723) && defined(CONFIG_SCIF_A) -/* SH7723 SCIFA use bus clock. So clock *2 */ -# define SCBRR_VALUE(bps, clk) (((clk * 2 * 2) + 16 * bps) / (32 * bps) - 1) -#else /* Generic SuperH */ -# define SCBRR_VALUE(bps, clk) ((clk + 16 * bps) / (32 * bps) - 1) -#endif - -#define SCR_RE (1 << 4) -#define SCR_TE (1 << 5) -#define FCR_RFRST (1 << 1) /* RFCL */ -#define FCR_TFRST (1 << 2) /* TFCL */ -#define FSR_DR (1 << 0) -#define FSR_RDF (1 << 1) -#define FSR_FER (1 << 3) -#define FSR_BRK (1 << 4) -#define FSR_FER (1 << 3) -#define FSR_TEND (1 << 6) -#define FSR_ER (1 << 7) - -/*----------------------------------------------------------------------*/ +static struct uart_port sh_sci = { + .membase = (unsigned char*)SCIF_BASE, + .mapbase = SCIF_BASE, + .type = SCIF_BASE_PORT, +}; void serial_setbrg(void) { - writeb(SCBRR_VALUE(gd->baudrate, CONFIG_SYS_CLK_FREQ), SCBRR); + DECLARE_GLOBAL_DATA_PTR; + sci_out(&sh_sci, SCBRR, SCBRR_VALUE(gd->baudrate, CONFIG_SYS_CLK_FREQ)); } int serial_init(void) { - writew((SCR_RE | SCR_TE), SCSCR); - writew(0, SCSMR); - writew(0, SCSMR); - writew((FCR_RFRST | FCR_TFRST), SCFCR); - readw(SCFCR); - writew(0, SCFCR); + sci_out(&sh_sci, SCSCR , SCSCR_INIT(&sh_sci)); + sci_out(&sh_sci, SCSCR , SCSCR_INIT(&sh_sci)); + sci_out(&sh_sci, SCSMR, 0); + sci_out(&sh_sci, SCSMR, 0); + sci_out(&sh_sci, SCFCR, SCFCR_RFRST|SCFCR_TFRST); + sci_in(&sh_sci, SCFCR); + sci_out(&sh_sci, SCFCR, 0); serial_setbrg(); return 0; } -static int serial_rx_fifo_level(void) +#if defined(CONFIG_CPU_SH7760) || \ + defined(CONFIG_CPU_SH7780) || \ + defined(CONFIG_CPU_SH7785) || \ + defined(CONFIG_CPU_SH7786) +static int scif_rxfill(struct uart_port *port) +{ + return sci_in(port, SCRFDR) & 0xff; +} +#elif defined(CONFIG_CPU_SH7763) +static int scif_rxfill(struct uart_port *port) { -#if defined(SCRFDR) - return (readw(SCRFDR) >> 0) & FIFOLEVEL_MASK; + if ((port->mapbase == 0xffe00000) || + (port->mapbase == 0xffe08000)) { + /* SCIF0/1*/ + return sci_in(port, SCRFDR) & 0xff; + } else { + /* SCIF2 */ + return sci_in(port, SCFDR) & SCIF2_RFDC_MASK; + } +} +#elif defined(CONFIG_ARCH_SH7372) +static int scif_rxfill(struct uart_port *port) +{ + if (port->type == PORT_SCIFA) + return sci_in(port, SCFDR) & SCIF_RFDC_MASK; + else + return sci_in(port, SCRFDR); +} #else - return (readw(SCFDR) >> 0) & FIFOLEVEL_MASK; +static int scif_rxfill(struct uart_port *port) +{ + return sci_in(port, SCFDR) & SCIF_RFDC_MASK; +} #endif + +static int serial_rx_fifo_level(void) +{ + return scif_rxfill(&sh_sci); } void serial_raw_putc(const char c) { - unsigned int fsr_bits_to_clear; - while (1) { - if (readw(SCFSR) & FSR_TEND) { /* Tx fifo is empty */ - fsr_bits_to_clear = FSR_TEND; + /* Tx fifo is empty */ + if (sci_in(&sh_sci, SCxSR) & SCxSR_TEND(&sh_sci)) break; - } } - writeb(c, SCFTDR); - if (fsr_bits_to_clear != 0) - writew(readw(SCFSR) & ~fsr_bits_to_clear, SCFSR); + sci_out(&sh_sci, SCxTDR, c); + sci_out(&sh_sci, SCxSR, sci_in(&sh_sci, SCxSR) & ~SCxSR_TEND(&sh_sci)); } void serial_putc(const char c) @@ -193,27 +142,25 @@ int serial_tstc(void) return serial_rx_fifo_level() ? 1 : 0; } -#define FSR_ERR_CLEAR 0x0063 -#define RDRF_CLEAR 0x00fc void handle_error(void) { - readw(SCFSR); - writew(FSR_ERR_CLEAR, SCFSR); - readw(SCLSR); - writew(0x00, SCLSR); + sci_in(&sh_sci, SCxSR); + sci_out(&sh_sci, SCxSR, SCxSR_ERROR_CLEAR(&sh_sci)); + sci_in(&sh_sci, SCLSR); + sci_out(&sh_sci, SCLSR, 0x00); } int serial_getc_check(void) { unsigned short status; - status = readw(SCFSR); + status = sci_in(&sh_sci, SCxSR); - if (status & (FSR_FER | FSR_ER | FSR_BRK)) + if (status & SCIF_ERRORS) handle_error(); - if (readw(SCLSR) & LSR_ORER) + if (sci_in(&sh_sci, SCLSR) & SCxSR_ORER(&sh_sci)) handle_error(); - return status & (FSR_DR | FSR_RDF); + return status & (SCIF_DR | SCxSR_RDxF(&sh_sci)); } int serial_getc(void) @@ -224,16 +171,15 @@ int serial_getc(void) while (!serial_getc_check()) ; - ch = readb(SCFRDR); - status = readw(SCFSR); + ch = sci_in(&sh_sci, SCxRDR); + status = sci_in(&sh_sci, SCxSR); - writew(RDRF_CLEAR, SCFSR); + sci_out(&sh_sci, SCxSR, SCxSR_RDxF_CLEAR(&sh_sci)); - if (status & (FSR_FER | FSR_FER | FSR_ER | FSR_BRK)) - handle_error(); + if (status & SCIF_ERRORS) + handle_error(); - if (readw(SCLSR) & LSR_ORER) + if (sci_in(&sh_sci, SCLSR) & SCxSR_ORER(&sh_sci)) handle_error(); - return ch; } |