Merge branch 'for-next/rs485'
Conflicts: common/console_common.c
This commit is contained in:
commit
ebf9022f2e
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@ -327,20 +327,37 @@ static int animeo_ip_devices_init(void)
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device_initcall(animeo_ip_devices_init);
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static int animeo_ip_console_init(void)
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static struct device_d *usart0, *usart1;
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static void animeo_ip_shutdown_uart(void *base)
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{
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#define ATMEL_US_BRGR 0x0020
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writel(0, base + ATMEL_US_BRGR);
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}
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static void animeo_ip_shutdown(void)
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{
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/*
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* disable the dbgu enable by the bootstrap
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* disable the dbgu and others enable by the bootstrap
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* so linux can detect that we only enable the uart2
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* and use it for decompress
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*/
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#define ATMEL_US_BRGR 0x0020
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at91_sys_write(AT91_DBGU + ATMEL_US_BRGR, 0);
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animeo_ip_shutdown_uart(IOMEM(AT91_DBGU + AT91_BASE_SYS));
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animeo_ip_shutdown_uart(IOMEM(AT91SAM9260_BASE_US0));
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animeo_ip_shutdown_uart(IOMEM(AT91SAM9260_BASE_US1));
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}
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static int animeo_ip_console_init(void)
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{
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at91_register_uart(3, 0);
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usart0 = at91_register_uart(1, ATMEL_UART_RTS);
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usart1 = at91_register_uart(2, ATMEL_UART_RTS);
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board_shutdown = animeo_ip_shutdown;
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barebox_set_model("Somfy Animeo IP");
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barebox_set_hostname("animeoip");
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at91_register_uart(3, 0);
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return 0;
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}
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console_initcall(animeo_ip_console_init);
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@ -351,3 +368,64 @@ static int animeo_ip_main_clock(void)
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return 0;
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}
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pure_initcall(animeo_ip_main_clock);
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static unsigned int get_char_timeout(struct console_device *cs, int timeout)
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{
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uint64_t start = get_time_ns();
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do {
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if (!cs->tstc(cs))
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continue;
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return cs->getc(cs);
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} while (!is_timeout(start, timeout));
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return -1;
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}
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static int animeo_ip_cross_detect_init(void)
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{
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struct console_device *cs0, *cs1;
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int i;
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char *s = "loop";
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int crossed = 0;
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cs0 = console_get_by_dev(usart0);
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if (!cs0)
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return -EINVAL;
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cs1 = console_get_by_dev(usart1);
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if (!cs1)
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return -EINVAL;
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at91_set_gpio_input(AT91_PIN_PC16, 0);
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cs0->set_mode(cs0, CONSOLE_MODE_RS485);
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cs0->setbrg(cs0, 38400);
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cs1->set_mode(cs1, CONSOLE_MODE_RS485);
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cs1->setbrg(cs1, 38400);
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/* empty the bus */
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while (cs1->tstc(cs1))
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cs1->getc(cs1);
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for (i = 0; i < strlen(s); i++) {
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unsigned int ch = s[i];
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unsigned int c;
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resend:
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cs0->putc(cs0, ch);
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c = get_char_timeout(cs1, 10 * MSECOND);
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if (c == 0)
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goto resend;
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else if (c != ch)
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goto err;
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}
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crossed = 1;
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err:
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export_env_ull("rs485_crossed", crossed);
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pr_info("rs485 ports %scrossed\n", crossed ? "" : "not ");
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return 0;
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}
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late_initcall(animeo_ip_cross_detect_init);
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@ -16,7 +16,6 @@ CONFIG_PROMPT_HUSH_PS2="y"
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CONFIG_HUSH_FANCY_PROMPT=y
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CONFIG_CMDLINE_EDITING=y
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CONFIG_AUTO_COMPLETE=y
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CONFIG_CONSOLE_ACTIVATE_ALL=y
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CONFIG_DEFAULT_ENVIRONMENT_GENERIC=y
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CONFIG_DEFAULT_ENVIRONMENT_PATH="arch/arm/boards/animeo_ip/env"
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CONFIG_CMD_EDIT=y
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@ -169,6 +169,19 @@ int fputc(int fd, char c)
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}
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EXPORT_SYMBOL(fputc);
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struct console_device *console_get_by_dev(struct device_d *dev)
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{
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struct console_device *cdev;
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for_each_console(cdev) {
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if (cdev->dev == dev)
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return cdev;
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}
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return NULL;
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}
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EXPORT_SYMBOL(console_get_by_dev);
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/*
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* @brief returns current used console device
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*
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@ -161,6 +161,8 @@ void __noreturn hang (void)
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for (;;);
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}
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void (*board_shutdown)(void);
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/* Everything needed to cleanly shutdown barebox.
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* Should be called before starting an OS to get
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* the devices into a clean state
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@ -171,4 +173,6 @@ void shutdown_barebox(void)
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#ifdef ARCH_SHUTDOWN
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arch_shutdown();
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#endif
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if (board_shutdown)
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board_shutdown();
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}
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@ -362,6 +362,32 @@ static int atmel_serial_setbaudrate(struct console_device *cdev, int baudrate)
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return 0;
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}
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static int atmel_serial_set_mode(struct console_device *cdev, enum console_mode mode)
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{
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struct atmel_uart_port *uart = to_atmel_uart_port(cdev);
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u32 mr;
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u8 m;
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mr = readl(uart->base + USART3_MR);
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mr &= ~0xf;
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switch (mode) {
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case CONSOLE_MODE_NORMAL:
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m = USART3_USART_MODE_NORMAL;
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break;
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case CONSOLE_MODE_RS485:
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m = USART3_USART_MODE_RS485;
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break;
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default:
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return -EINVAL;
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}
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mr |= USART3_BF(USART_MODE, m);
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writel(mr, uart->base + USART3_MR);
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return 0;
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}
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/*
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* Initialise the serial port with the given baudrate. The settings
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* are always 8 data bits, no parity, 1 stop bit, no start bits.
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@ -401,6 +427,7 @@ static int atmel_serial_probe(struct device_d *dev)
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cdev->putc = atmel_serial_putc;
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cdev->getc = atmel_serial_getc;
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cdev->setbrg = atmel_serial_setbaudrate;
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cdev->set_mode = atmel_serial_set_mode;
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atmel_serial_init_port(cdev);
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@ -152,6 +152,7 @@ extern int (*barebox_main)(void);
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void __noreturn start_barebox(void);
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void shutdown_barebox(void);
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extern void (*board_shutdown)(void);
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/*
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* architectures which have special calling conventions for
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@ -28,6 +28,11 @@
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#define CONSOLE_STDOUT (1 << 1)
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#define CONSOLE_STDERR (1 << 2)
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enum console_mode {
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CONSOLE_MODE_NORMAL,
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CONSOLE_MODE_RS485,
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};
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struct console_device {
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struct device_d *dev;
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struct device_d class_dev;
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@ -37,6 +42,7 @@ struct console_device {
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int (*getc)(struct console_device *cdev);
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int (*setbrg)(struct console_device *cdev, int baudrate);
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void (*flush)(struct console_device *cdev);
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int (*set_mode)(struct console_device *cdev, enum console_mode mode);
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struct list_head list;
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@ -48,6 +54,8 @@ struct console_device {
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int console_register(struct console_device *cdev);
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int console_unregister(struct console_device *cdev);
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struct console_device *console_get_by_dev(struct device_d *dev);
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extern struct list_head console_list;
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#define for_each_console(console) list_for_each_entry(console, &console_list, list)
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