diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/Makefile | 1 | ||||
| -rw-r--r-- | drivers/serial/opencores_yanu.c | 52 | ||||
| -rw-r--r-- | drivers/serial/serial.c | 2 | ||||
| -rw-r--r-- | drivers/serial/serial_arc.c | 30 | ||||
| -rw-r--r-- | drivers/serial/serial_ixp.c | 130 | ||||
| -rw-r--r-- | drivers/serial/serial_s5p.c | 4 | ||||
| -rw-r--r-- | drivers/serial/serial_zynq.c | 33 |
7 files changed, 51 insertions, 201 deletions
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 5eb4601449..571c18fa93 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -18,7 +18,6 @@ obj-$(CONFIG_SYS_NS16550) += ns16550.o obj-$(CONFIG_S5P) += serial_s5p.o obj-$(CONFIG_SYS_NS16550_SERIAL) += serial_ns16550.o obj-$(CONFIG_IMX_SERIAL) += serial_imx.o -obj-$(CONFIG_IXP_SERIAL) += serial_ixp.o obj-$(CONFIG_KS8695_SERIAL) += serial_ks8695.o obj-$(CONFIG_MAX3100_SERIAL) += serial_max3100.o obj-$(CONFIG_MXC_UART) += serial_mxc.o diff --git a/drivers/serial/opencores_yanu.c b/drivers/serial/opencores_yanu.c index 8de2eca2ac..d4ed60c303 100644 --- a/drivers/serial/opencores_yanu.c +++ b/drivers/serial/opencores_yanu.c @@ -8,6 +8,7 @@ #include <watchdog.h> #include <asm/io.h> #include <nios2-yanu.h> +#include <serial.h> DECLARE_GLOBAL_DATA_PTR; @@ -17,62 +18,34 @@ DECLARE_GLOBAL_DATA_PTR; static yanu_uart_t *uart = (yanu_uart_t *)CONFIG_SYS_NIOS_CONSOLE; -#if defined(CONFIG_SYS_NIOS_FIXEDBAUD) - -/* Everything's already setup for fixed-baud PTF assignment*/ - static void oc_serial_setbrg(void) { int n, k; const unsigned max_uns = 0xFFFFFFFF; unsigned best_n, best_m, baud; + unsigned baudrate; - /* compute best N and M couple */ - best_n = YANU_MAX_PRESCALER_N; - for (n = YANU_MAX_PRESCALER_N; n >= 0; n--) { - if ((unsigned)CONFIG_SYS_CLK_FREQ / (1 << (n + 4)) >= - (unsigned)CONFIG_BAUDRATE) { - best_n = n; - break; - } - } - for (k = 0;; k++) { - if ((unsigned)CONFIG_BAUDRATE <= (max_uns >> (15+n-k))) - break; - } - best_m = - ((unsigned)CONFIG_BAUDRATE * (1 << (15 + n - k))) / - ((unsigned)CONFIG_SYS_CLK_FREQ >> k); - - baud = best_m + best_n * YANU_BAUDE; - writel(baud, &uart->baud); - - return; -} - +#if defined(CONFIG_SYS_NIOS_FIXEDBAUD) + /* Everything's already setup for fixed-baud PTF assignment */ + baudrate = CONFIG_BAUDRATE; #else - -static void oc_serial_setbrg(void) -{ - int n, k; - const unsigned max_uns = 0xFFFFFFFF; - unsigned best_n, best_m, baud; - + baudrate = gd->baudrate; +#endif /* compute best N and M couple */ best_n = YANU_MAX_PRESCALER_N; for (n = YANU_MAX_PRESCALER_N; n >= 0; n--) { if ((unsigned)CONFIG_SYS_CLK_FREQ / (1 << (n + 4)) >= - gd->baudrate) { + baudrate) { best_n = n; break; } } for (k = 0;; k++) { - if (gd->baudrate <= (max_uns >> (15+n-k))) + if (baudrate <= (max_uns >> (15+n-k))) break; } best_m = - (gd->baudrate * (1 << (15 + n - k))) / + (baudrate * (1 << (15 + n - k))) / ((unsigned)CONFIG_SYS_CLK_FREQ >> k); baud = best_m + best_n * YANU_BAUDE; @@ -81,9 +54,6 @@ static void oc_serial_setbrg(void) return; } - -#endif /* CONFIG_SYS_NIOS_FIXEDBAUD */ - static int oc_serial_init(void) { unsigned action,control; @@ -154,7 +124,7 @@ static int oc_serial_tstc(void) ((1 << YANU_RFIFO_CHARS_N) - 1)) > 0); } -statoc int oc_serial_getc(void) +static int oc_serial_getc(void) { while (serial_tstc() == 0) WATCHDOG_RESET (); diff --git a/drivers/serial/serial.c b/drivers/serial/serial.c index 05cb369821..df05bde461 100644 --- a/drivers/serial/serial.c +++ b/drivers/serial/serial.c @@ -150,7 +150,6 @@ serial_initfunc(oc_serial_initialize); serial_initfunc(sandbox_serial_initialize); serial_initfunc(clps7111_serial_initialize); serial_initfunc(imx_serial_initialize); -serial_initfunc(ixp_serial_initialize); serial_initfunc(ks8695_serial_initialize); serial_initfunc(lh7a40x_serial_initialize); serial_initfunc(max3100_serial_initialize); @@ -244,7 +243,6 @@ void serial_initialize(void) sandbox_serial_initialize(); clps7111_serial_initialize(); imx_serial_initialize(); - ixp_serial_initialize(); ks8695_serial_initialize(); lh7a40x_serial_initialize(); max3100_serial_initialize(); diff --git a/drivers/serial/serial_arc.c b/drivers/serial/serial_arc.c index e63d25d794..b21b12ba44 100644 --- a/drivers/serial/serial_arc.c +++ b/drivers/serial/serial_arc.c @@ -38,8 +38,24 @@ static void arc_serial_setbrg(void) gd->baudrate = CONFIG_BAUDRATE; arc_console_baud = gd->cpu_clk / (gd->baudrate * 4) - 1; - writel(arc_console_baud & 0xff, ®s->baudl); - writel((arc_console_baud & 0xff00) >> 8, ®s->baudh); + writeb(arc_console_baud & 0xff, ®s->baudl); + +#ifdef CONFIG_ARC + /* + * UART ISS(Instruction Set simulator) emulation has a subtle bug: + * A existing value of Baudh = 0 is used as a indication to startup + * it's internal state machine. + * Thus if baudh is set to 0, 2 times, it chokes. + * This happens with BAUD=115200 and the formaula above + * Until that is fixed, when running on ISS, we will set baudh to !0 + */ + if (gd->arch.running_on_hw) + writeb((arc_console_baud & 0xff00) >> 8, ®s->baudh); + else + writeb(1, ®s->baudh); +#else + writeb((arc_console_baud & 0xff00) >> 8, ®s->baudh); +#endif } static int arc_serial_init(void) @@ -54,15 +70,15 @@ static void arc_serial_putc(const char c) if (c == '\n') arc_serial_putc('\r'); - while (!(readl(®s->status) & UART_TXEMPTY)) + while (!(readb(®s->status) & UART_TXEMPTY)) ; - writel(c, ®s->data); + writeb(c, ®s->data); } static int arc_serial_tstc(void) { - return !(readl(®s->status) & UART_RXEMPTY); + return !(readb(®s->status) & UART_RXEMPTY); } static int arc_serial_getc(void) @@ -71,10 +87,10 @@ static int arc_serial_getc(void) ; /* Check for overflow errors */ - if (readl(®s->status) & UART_OVERFLOW_ERR) + if (readb(®s->status) & UART_OVERFLOW_ERR) return 0; - return readl(®s->data) & 0xFF; + return readb(®s->data) & 0xFF; } static void arc_serial_puts(const char *s) diff --git a/drivers/serial/serial_ixp.c b/drivers/serial/serial_ixp.c deleted file mode 100644 index b9d0f5bfa5..0000000000 --- a/drivers/serial/serial_ixp.c +++ /dev/null @@ -1,130 +0,0 @@ -/* - * (C) Copyright 2002 - * Wolfgang Denk, DENX Software Engineering, <wd@denx.de> - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Marius Groeger <mgroeger@sysgo.de> - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Alex Zuepke <azu@sysgo.de> - * - * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <asm/arch/ixp425.h> -#include <watchdog.h> -#include <serial.h> -#include <linux/compiler.h> - -/* - * 14.7456 MHz - * Baud Rate = -------------- - * 16 x Divisor - */ -#define SERIAL_CLOCK 921600 - -DECLARE_GLOBAL_DATA_PTR; - -static void ixp_serial_setbrg(void) -{ - unsigned int quot = 0; - int uart = CONFIG_SYS_IXP425_CONSOLE; - - if ((gd->baudrate <= SERIAL_CLOCK) && (SERIAL_CLOCK % gd->baudrate == 0)) - quot = SERIAL_CLOCK / gd->baudrate; - else - hang (); - - IER(uart) = 0; /* Disable for now */ - FCR(uart) = 0; /* No fifos enabled */ - - /* set baud rate */ - LCR(uart) = LCR_WLS0 | LCR_WLS1 | LCR_DLAB; - DLL(uart) = quot & 0xff; - DLH(uart) = quot >> 8; - LCR(uart) = LCR_WLS0 | LCR_WLS1; -#ifdef CONFIG_SERIAL_RTS_ACTIVE - MCR(uart) = MCR_RTS; /* set RTS active */ -#else - MCR(uart) = 0; /* set RTS inactive */ -#endif - IER(uart) = IER_UUE; -} - -/* - * Initialise the serial port with the given baudrate. The settings - * are always 8 data bits, no parity, 1 stop bit, no start bits. - * - */ -static int ixp_serial_init(void) -{ - serial_setbrg (); - - return (0); -} - - -/* - * Output a single byte to the serial port. - */ -static void ixp_serial_putc(const char c) -{ - /* wait for room in the tx FIFO on UART */ - while ((LSR(CONFIG_SYS_IXP425_CONSOLE) & LSR_TEMT) == 0) - WATCHDOG_RESET(); /* Reset HW Watchdog, if needed */ - - THR(CONFIG_SYS_IXP425_CONSOLE) = c; - - /* If \n, also do \r */ - if (c == '\n') - serial_putc ('\r'); -} - -/* - * Read a single byte from the serial port. Returns 1 on success, 0 - * otherwise. When the function is succesfull, the character read is - * written into its argument c. - */ -static int ixp_serial_tstc(void) -{ - return LSR(CONFIG_SYS_IXP425_CONSOLE) & LSR_DR; -} - -/* - * Read a single byte from the serial port. Returns 1 on success, 0 - * otherwise. When the function is succesfull, the character read is - * written into its argument c. - */ -static int ixp_serial_getc(void) -{ - while (!(LSR(CONFIG_SYS_IXP425_CONSOLE) & LSR_DR)) - WATCHDOG_RESET(); /* Reset HW Watchdog, if needed */ - - return (char) RBR(CONFIG_SYS_IXP425_CONSOLE) & 0xff; -} - -static struct serial_device ixp_serial_drv = { - .name = "ixp_serial", - .start = ixp_serial_init, - .stop = NULL, - .setbrg = ixp_serial_setbrg, - .putc = ixp_serial_putc, - .puts = default_serial_puts, - .getc = ixp_serial_getc, - .tstc = ixp_serial_tstc, -}; - -void ixp_serial_initialize(void) -{ - serial_register(&ixp_serial_drv); -} - -__weak struct serial_device *default_serial_console(void) -{ - return &ixp_serial_drv; -} diff --git a/drivers/serial/serial_s5p.c b/drivers/serial/serial_s5p.c index 89f5d68dd0..98c62b4c14 100644 --- a/drivers/serial/serial_s5p.c +++ b/drivers/serial/serial_s5p.c @@ -100,8 +100,8 @@ static int serial_init_dev(const int dev_index) { struct s5p_uart *const uart = s5p_get_base_uart(dev_index); - /* enable FIFOs */ - writel(0x1, &uart->ufcon); + /* enable FIFOs, auto clear Rx FIFO */ + writel(0x3, &uart->ufcon); writel(0, &uart->umcon); /* 8N1 */ writel(0x3, &uart->ulcon); diff --git a/drivers/serial/serial_zynq.c b/drivers/serial/serial_zynq.c index ff28f3c801..22c6bf099c 100644 --- a/drivers/serial/serial_zynq.c +++ b/drivers/serial/serial_zynq.c @@ -10,6 +10,8 @@ #include <asm/io.h> #include <linux/compiler.h> #include <serial.h> +#include <asm/arch/clk.h> +#include <asm/arch/hardware.h> #define ZYNQ_UART_SR_TXFULL 0x00000010 /* TX FIFO full */ #define ZYNQ_UART_SR_RXEMPTY 0x00000002 /* RX FIFO empty */ @@ -33,28 +35,24 @@ struct uart_zynq { }; static struct uart_zynq *uart_zynq_ports[2] = { -#ifdef CONFIG_ZYNQ_SERIAL_BASEADDR0 - [0] = (struct uart_zynq *)CONFIG_ZYNQ_SERIAL_BASEADDR0, + [0] = (struct uart_zynq *)ZYNQ_SERIAL_BASEADDR0, + [1] = (struct uart_zynq *)ZYNQ_SERIAL_BASEADDR1, +}; + +#if !defined(CONFIG_ZYNQ_SERIAL_BAUDRATE0) +# define CONFIG_ZYNQ_SERIAL_BAUDRATE0 CONFIG_BAUDRATE #endif -#ifdef CONFIG_ZYNQ_SERIAL_BASEADDR1 - [1] = (struct uart_zynq *)CONFIG_ZYNQ_SERIAL_BASEADDR1, +#if !defined(CONFIG_ZYNQ_SERIAL_BAUDRATE1) +# define CONFIG_ZYNQ_SERIAL_BAUDRATE1 CONFIG_BAUDRATE #endif -}; struct uart_zynq_params { u32 baudrate; - u32 clock; }; static struct uart_zynq_params uart_zynq_ports_param[2] = { -#if defined(CONFIG_ZYNQ_SERIAL_BAUDRATE0) && defined(CONFIG_ZYNQ_SERIAL_CLOCK0) [0].baudrate = CONFIG_ZYNQ_SERIAL_BAUDRATE0, - [0].clock = CONFIG_ZYNQ_SERIAL_CLOCK0, -#endif -#if defined(CONFIG_ZYNQ_SERIAL_BAUDRATE1) && defined(CONFIG_ZYNQ_SERIAL_CLOCK1) [1].baudrate = CONFIG_ZYNQ_SERIAL_BAUDRATE1, - [1].clock = CONFIG_ZYNQ_SERIAL_CLOCK1, -#endif }; /* Set up the baud rate in gd struct */ @@ -64,7 +62,7 @@ static void uart_zynq_serial_setbrg(const int port) unsigned int calc_bauderror, bdiv, bgen; unsigned long calc_baud = 0; unsigned long baud = uart_zynq_ports_param[port].baudrate; - unsigned long clock = uart_zynq_ports_param[port].clock; + unsigned long clock = get_uart_clk(port); struct uart_zynq *regs = uart_zynq_ports[port]; /* master clock @@ -186,20 +184,19 @@ struct serial_device uart_zynq_serial1_device = __weak struct serial_device *default_serial_console(void) { +#if defined(CONFIG_ZYNQ_SERIAL_UART0) if (uart_zynq_ports[0]) return &uart_zynq_serial0_device; +#endif +#if defined(CONFIG_ZYNQ_SERIAL_UART1) if (uart_zynq_ports[1]) return &uart_zynq_serial1_device; - +#endif return NULL; } void zynq_serial_initalize(void) { -#ifdef CONFIG_ZYNQ_SERIAL_BASEADDR0 serial_register(&uart_zynq_serial0_device); -#endif -#ifdef CONFIG_ZYNQ_SERIAL_BASEADDR1 serial_register(&uart_zynq_serial1_device); -#endif } |