diff options
Diffstat (limited to 'src/soc/broadcom/cygnus/ns16550.c')
| -rw-r--r-- | src/soc/broadcom/cygnus/ns16550.c | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/src/soc/broadcom/cygnus/ns16550.c b/src/soc/broadcom/cygnus/ns16550.c new file mode 100644 index 0000000000..cbb32e0155 --- /dev/null +++ b/src/soc/broadcom/cygnus/ns16550.c @@ -0,0 +1,301 @@ +/* + * (C) Copyright 2000 + * Rob Taylor, Flying Pig Systems. robt@flyingpig.com. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <linux/compiler.h> + +#include <ns16550.h> +#ifdef CONFIG_NS87308 +#include <ns87308.h> +#endif + +#include <serial.h> + +#ifndef CONFIG_NS16550_MIN_FUNCTIONS + +DECLARE_GLOBAL_DATA_PTR; + +#if !defined(CONFIG_CONS_INDEX) +#elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6) +#error "Invalid console index value." +#endif + +#if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1) +#error "Console port 1 defined but not configured." +#elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2) +#error "Console port 2 defined but not configured." +#elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3) +#error "Console port 3 defined but not configured." +#elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4) +#error "Console port 4 defined but not configured." +#elif CONFIG_CONS_INDEX == 5 && !defined(CONFIG_SYS_NS16550_COM5) +#error "Console port 5 defined but not configured." +#elif CONFIG_CONS_INDEX == 6 && !defined(CONFIG_SYS_NS16550_COM6) +#error "Console port 6 defined but not configured." +#endif + +/* Note: The port number specified in the functions is 1 based. + * the array is 0 based. + */ +static NS16550_t serial_ports[6] = { +#ifdef CONFIG_SYS_NS16550_COM1 + (NS16550_t)CONFIG_SYS_NS16550_COM1, +#else + NULL, +#endif +#ifdef CONFIG_SYS_NS16550_COM2 + (NS16550_t)CONFIG_SYS_NS16550_COM2, +#else + NULL, +#endif +#ifdef CONFIG_SYS_NS16550_COM3 + (NS16550_t)CONFIG_SYS_NS16550_COM3, +#else + NULL, +#endif +#ifdef CONFIG_SYS_NS16550_COM4 + (NS16550_t)CONFIG_SYS_NS16550_COM4, +#else + NULL, +#endif +#ifdef CONFIG_SYS_NS16550_COM5 + (NS16550_t)CONFIG_SYS_NS16550_COM5, +#else + NULL, +#endif +#ifdef CONFIG_SYS_NS16550_COM6 + (NS16550_t)CONFIG_SYS_NS16550_COM6 +#else + NULL +#endif +}; + +#define PORT serial_ports[port-1] + +/* Multi serial device functions */ +#define DECLARE_ESERIAL_FUNCTIONS(port) \ + static int eserial##port##_init(void) \ + { \ + int clock_divisor; \ + clock_divisor = calc_divisor(serial_ports[port-1]); \ + NS16550_init(serial_ports[port-1], clock_divisor); \ + return 0 ; \ + } \ + static void eserial##port##_setbrg(void) \ + { \ + serial_setbrg_dev(port); \ + } \ + static int eserial##port##_getc(void) \ + { \ + return serial_getc_dev(port); \ + } \ + static int eserial##port##_tstc(void) \ + { \ + return serial_tstc_dev(port); \ + } \ + static void eserial##port##_putc(const char c) \ + { \ + serial_putc_dev(port, c); \ + } \ + static void eserial##port##_puts(const char *s) \ + { \ + serial_puts_dev(port, s); \ + } + +/* Serial device descriptor */ +#define INIT_ESERIAL_STRUCTURE(port, __name) { \ + .name = __name, \ + .start = eserial##port##_init, \ + .stop = NULL, \ + .setbrg = eserial##port##_setbrg, \ + .getc = eserial##port##_getc, \ + .tstc = eserial##port##_tstc, \ + .putc = eserial##port##_putc, \ + .puts = eserial##port##_puts, \ +} + +int calc_divisor(NS16550_t port) +{ +#ifdef CONFIG_OMAP1510 + /* If can't cleanly clock 115200 set div to 1 */ + if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) { + port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ + return (1); /* return 1 for base divisor */ + } + port->osc_12m_sel = 0; /* clear if previsouly set */ +#endif +#ifdef CONFIG_OMAP1610 + /* If can't cleanly clock 115200 set div to 1 */ + if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) { + return (26); /* return 26 for base divisor */ + } +#endif + +#define MODE_X_DIV 16 + /* Compute divisor value. Normally, we should simply return: + * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate + * but we need to round that value by adding 0.5. + * Rounding is especially important at high baud rates. + */ + return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) / + (MODE_X_DIV * gd->baudrate); +} + +void +_serial_putc(const char c,const int port) +{ + if (c == '\n') + NS16550_putc(PORT, '\r'); + + NS16550_putc(PORT, c); +} + +void +_serial_putc_raw(const char c,const int port) +{ + NS16550_putc(PORT, c); +} + +void +_serial_puts (const char *s,const int port) +{ + while (*s) { + _serial_putc (*s++,port); + } +} + + +int +_serial_getc(const int port) +{ + return NS16550_getc(PORT); +} + +int +_serial_tstc(const int port) +{ + return NS16550_tstc(PORT); +} + +void +_serial_setbrg (const int port) +{ + int clock_divisor; + + clock_divisor = calc_divisor(PORT); + NS16550_reinit(PORT, clock_divisor); +} + +static inline void +serial_putc_dev(unsigned int dev_index,const char c) +{ + _serial_putc(c,dev_index); +} + +static inline void +serial_putc_raw_dev(unsigned int dev_index,const char c) +{ + _serial_putc_raw(c,dev_index); +} + +static inline void +serial_puts_dev(unsigned int dev_index,const char *s) +{ + _serial_puts(s,dev_index); +} + +static inline int +serial_getc_dev(unsigned int dev_index) +{ + return _serial_getc(dev_index); +} + +static inline int +serial_tstc_dev(unsigned int dev_index) +{ + return _serial_tstc(dev_index); +} + +static inline void +serial_setbrg_dev(unsigned int dev_index) +{ + _serial_setbrg(dev_index); +} + +#if defined(CONFIG_SYS_NS16550_COM1) +DECLARE_ESERIAL_FUNCTIONS(1); +struct serial_device eserial1_device = + INIT_ESERIAL_STRUCTURE(1, "eserial0"); +#endif +#if defined(CONFIG_SYS_NS16550_COM2) +DECLARE_ESERIAL_FUNCTIONS(2); +struct serial_device eserial2_device = + INIT_ESERIAL_STRUCTURE(2, "eserial1"); +#endif +#if defined(CONFIG_SYS_NS16550_COM3) +DECLARE_ESERIAL_FUNCTIONS(3); +struct serial_device eserial3_device = + INIT_ESERIAL_STRUCTURE(3, "eserial2"); +#endif +#if defined(CONFIG_SYS_NS16550_COM4) +DECLARE_ESERIAL_FUNCTIONS(4); +struct serial_device eserial4_device = + INIT_ESERIAL_STRUCTURE(4, "eserial3"); +#endif +#if defined(CONFIG_SYS_NS16550_COM5) +DECLARE_ESERIAL_FUNCTIONS(5); +struct serial_device eserial5_device = + INIT_ESERIAL_STRUCTURE(5, "eserial4"); +#endif +#if defined(CONFIG_SYS_NS16550_COM6) +DECLARE_ESERIAL_FUNCTIONS(6); +struct serial_device eserial6_device = + INIT_ESERIAL_STRUCTURE(6, "eserial5"); +#endif + +__weak struct serial_device *default_serial_console(void) +{ +#if CONFIG_CONS_INDEX == 1 + return &eserial1_device; +#elif CONFIG_CONS_INDEX == 2 + return &eserial2_device; +#elif CONFIG_CONS_INDEX == 3 + return &eserial3_device; +#elif CONFIG_CONS_INDEX == 4 + return &eserial4_device; +#elif CONFIG_CONS_INDEX == 5 + return &eserial5_device; +#elif CONFIG_CONS_INDEX == 6 + return &eserial6_device; +#else +#error "Bad CONFIG_CONS_INDEX." +#endif +} + +void ns16550_serial_initialize(void) +{ +#if defined(CONFIG_SYS_NS16550_COM1) + serial_register(&eserial1_device); +#endif +#if defined(CONFIG_SYS_NS16550_COM2) + serial_register(&eserial2_device); +#endif +#if defined(CONFIG_SYS_NS16550_COM3) + serial_register(&eserial3_device); +#endif +#if defined(CONFIG_SYS_NS16550_COM4) + serial_register(&eserial4_device); +#endif +#if defined(CONFIG_SYS_NS16550_COM5) + serial_register(&eserial5_device); +#endif +#if defined(CONFIG_SYS_NS16550_COM6) + serial_register(&eserial6_device); +#endif +} + +#endif /* !CONFIG_NS16550_MIN_FUNCTIONS */ |