/* Initialise the serial port. The settings are always 8 data bits, no parity, * 1 stop bit, no start bits. */ static int serial_init_dev(const int dev_index) { struct s3c_uart *uart = (struct s3c_uart *)samsung_get_base_uart(); #ifdef CONFIG_HWFLOW hwflow = 0; /* turned off by default */ #endif /* FIFO enable, Tx/Rx FIFO clear */ writel(0x07, &uart->ufcon); writel(0x0, &uart->umcon); /* Normal,No parity,1 stop,8 bit */ writel(0x3, &uart->ulcon); /* * tx=level,rx=edge,disable timeout int.,enable rx error int., * normal,interrupt or polling */ writel(0x245, &uart->ucon); #ifdef CONFIG_HWFLOW writel(0x1, &uart->umcon); /* rts up */ #endif /* FIXME: This is sooooooooooooooooooo ugly */ #if defined(CONFIG_ARCH_GTA02_v1) || defined(CONFIG_ARCH_GTA02_v2) /* we need auto hw flow control on the gsm and gps port */ if (dev_index == 0 || dev_index == 1) writel(0x10, &uart->umcon); #endif _serial_setbrg(dev_index); return (0); }
/* * 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 _serial_getc(const int dev_index) { struct s3c_uart *uart = (struct s3c_uart *)samsung_get_base_uart(); while (!(readl(&uart->utrstat) & 0x1)) /* wait for character to arrive */ ; return readb(&uart->urxh) & 0xff; }
static inline struct s5p_uart *s5p_get_base_uart(int dev_index) { u32 offset = dev_index * sizeof(struct s5p_uart); // return (struct s5p_uart *)(samsung_get_base_uart() + offset); #if defined(CONFIG_S5PC210) || defined(CONFIG_S5P6450) || defined(CONFIG_ARCH_EXYNOS) return (struct s5p_uart *)samsung_get_base_uart(); #elif defined(CONFIG_S5PC110) return (struct s5p_uart *)(0XE2900800); #endif }
static void _serial_setbrg(const int dev_index) { struct s3c_uart *uart = (struct s3c_uart *)samsung_get_base_uart(); unsigned int reg = 0; int i; /* value is calculated so : (int)(PCLK/16./baudrate) -1 */ reg = get_pclk() / (16 * gd->baudrate) - 1; writel(reg, &uart->ubrdiv); for (i = 0; i < 100; i++) /* Delay */ ; }
/* * Output a single byte to the serial port. */ static void _serial_putc(const char c, const int dev_index) { struct s3c_uart *uart = (struct s3c_uart *)samsung_get_base_uart(); #ifdef CONFIG_MODEM_SUPPORT if (be_quiet) return; #endif while (!(readl(&uart->utrstat) & 0x2)) /* wait for room in the tx FIFO */ ; #ifdef CONFIG_HWFLOW while (hwflow && !(readl(&uart->umstat) & 0x1)) /* Wait for CTS up */ ; #endif writeb(c, &uart->utxh); /* If \n, also do \r */ if (c == '\n') serial_putc('\r'); }
static inline struct s5p_uart *s5p_get_base_uart(int dev_index) { u32 offset = dev_index * sizeof(struct s5p_uart); return (struct s5p_uart *)(samsung_get_base_uart() + offset); }
/* * Test whether a character is in the RX buffer */ static int _serial_tstc(const int dev_index) { struct s3c_uart *uart = (struct s3c_uart *)samsung_get_base_uart(); return readl(&uart->utrstat) & 0x1; }