diff options
| -rw-r--r-- | arch/mips/ath79/early_printk.c | 76 | ||||
| -rw-r--r-- | arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 3 | ||||
| -rw-r--r-- | arch/mips/include/asm/mach-ath79/ar933x_uart.h | 67 |
3 files changed, 137 insertions, 9 deletions
diff --git a/arch/mips/ath79/early_printk.c b/arch/mips/ath79/early_printk.c index 7499b0e9df26..6a51ced7a293 100644 --- a/arch/mips/ath79/early_printk.c +++ b/arch/mips/ath79/early_printk.c @@ -1,7 +1,7 @@ /* - * Atheros AR71XX/AR724X/AR913X SoC early printk support + * Atheros AR7XXX/AR9XXX SoC early printk support * - * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org> + * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> * * This program is free software; you can redistribute it and/or modify it @@ -10,27 +10,85 @@ */ #include <linux/io.h> +#include <linux/errno.h> #include <linux/serial_reg.h> #include <asm/addrspace.h> +#include <asm/mach-ath79/ath79.h> #include <asm/mach-ath79/ar71xx_regs.h> +#include <asm/mach-ath79/ar933x_uart.h> -static inline void prom_wait_thre(void __iomem *base) +static void (*_prom_putchar) (unsigned char); + +static inline void prom_putchar_wait(void __iomem *reg, u32 mask, u32 val) { - u32 lsr; + u32 t; do { - lsr = __raw_readl(base + UART_LSR * 4); - if (lsr & UART_LSR_THRE) + t = __raw_readl(reg); + if ((t & mask) == val) break; } while (1); } -void prom_putchar(unsigned char ch) +static void prom_putchar_ar71xx(unsigned char ch) { void __iomem *base = (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE)); - prom_wait_thre(base); + prom_putchar_wait(base + UART_LSR * 4, UART_LSR_THRE, UART_LSR_THRE); __raw_writel(ch, base + UART_TX * 4); - prom_wait_thre(base); + prom_putchar_wait(base + UART_LSR * 4, UART_LSR_THRE, UART_LSR_THRE); +} + +static void prom_putchar_ar933x(unsigned char ch) +{ + void __iomem *base = (void __iomem *)(KSEG1ADDR(AR933X_UART_BASE)); + + prom_putchar_wait(base + AR933X_UART_DATA_REG, AR933X_UART_DATA_TX_CSR, + AR933X_UART_DATA_TX_CSR); + __raw_writel(AR933X_UART_DATA_TX_CSR | ch, base + AR933X_UART_DATA_REG); + prom_putchar_wait(base + AR933X_UART_DATA_REG, AR933X_UART_DATA_TX_CSR, + AR933X_UART_DATA_TX_CSR); +} + +static void prom_putchar_dummy(unsigned char ch) +{ + /* nothing to do */ +} + +static void prom_putchar_init(void) +{ + void __iomem *base; + u32 id; + + base = (void __iomem *)(KSEG1ADDR(AR71XX_RESET_BASE)); + id = __raw_readl(base + AR71XX_RESET_REG_REV_ID); + id &= REV_ID_MAJOR_MASK; + + switch (id) { + case REV_ID_MAJOR_AR71XX: + case REV_ID_MAJOR_AR7240: + case REV_ID_MAJOR_AR7241: + case REV_ID_MAJOR_AR7242: + case REV_ID_MAJOR_AR913X: + _prom_putchar = prom_putchar_ar71xx; + break; + + case REV_ID_MAJOR_AR9330: + case REV_ID_MAJOR_AR9331: + _prom_putchar = prom_putchar_ar933x; + break; + + default: + _prom_putchar = prom_putchar_dummy; + break; + } +} + +void prom_putchar(unsigned char ch) +{ + if (!_prom_putchar) + prom_putchar_init(); + + _prom_putchar(ch); } diff --git a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h index 929be06e1475..90223f206610 100644 --- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h +++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h @@ -53,6 +53,9 @@ #define AR913X_WMAC_BASE (AR71XX_APB_BASE + 0x000C0000) #define AR913X_WMAC_SIZE 0x30000 +#define AR933X_UART_BASE (AR71XX_APB_BASE + 0x00020000) +#define AR933X_UART_SIZE 0x14 + /* * DDR_CTRL block */ diff --git a/arch/mips/include/asm/mach-ath79/ar933x_uart.h b/arch/mips/include/asm/mach-ath79/ar933x_uart.h new file mode 100644 index 000000000000..52730555937f --- /dev/null +++ b/arch/mips/include/asm/mach-ath79/ar933x_uart.h @@ -0,0 +1,67 @@ +/* + * Atheros AR933X UART defines + * + * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#ifndef __AR933X_UART_H +#define __AR933X_UART_H + +#define AR933X_UART_REGS_SIZE 20 +#define AR933X_UART_FIFO_SIZE 16 + +#define AR933X_UART_DATA_REG 0x00 +#define AR933X_UART_CS_REG 0x04 +#define AR933X_UART_CLOCK_REG 0x08 +#define AR933X_UART_INT_REG 0x0c +#define AR933X_UART_INT_EN_REG 0x10 + +#define AR933X_UART_DATA_TX_RX_MASK 0xff +#define AR933X_UART_DATA_RX_CSR BIT(8) +#define AR933X_UART_DATA_TX_CSR BIT(9) + +#define AR933X_UART_CS_PARITY_S 0 +#define AR933X_UART_CS_PARITY_M 0x3 +#define AR933X_UART_CS_PARITY_NONE 0 +#define AR933X_UART_CS_PARITY_ODD 1 +#define AR933X_UART_CS_PARITY_EVEN 2 +#define AR933X_UART_CS_IF_MODE_S 2 +#define AR933X_UART_CS_IF_MODE_M 0x3 +#define AR933X_UART_CS_IF_MODE_NONE 0 +#define AR933X_UART_CS_IF_MODE_DTE 1 +#define AR933X_UART_CS_IF_MODE_DCE 2 +#define AR933X_UART_CS_FLOW_CTRL_S 4 +#define AR933X_UART_CS_FLOW_CTRL_M 0x3 +#define AR933X_UART_CS_DMA_EN BIT(6) +#define AR933X_UART_CS_TX_READY_ORIDE BIT(7) +#define AR933X_UART_CS_RX_READY_ORIDE BIT(8) +#define AR933X_UART_CS_TX_READY BIT(9) +#define AR933X_UART_CS_RX_BREAK BIT(10) +#define AR933X_UART_CS_TX_BREAK BIT(11) +#define AR933X_UART_CS_HOST_INT BIT(12) +#define AR933X_UART_CS_HOST_INT_EN BIT(13) +#define AR933X_UART_CS_TX_BUSY BIT(14) +#define AR933X_UART_CS_RX_BUSY BIT(15) + +#define AR933X_UART_CLOCK_STEP_M 0xffff +#define AR933X_UART_CLOCK_SCALE_M 0xfff +#define AR933X_UART_CLOCK_SCALE_S 16 +#define AR933X_UART_CLOCK_STEP_M 0xffff + +#define AR933X_UART_INT_RX_VALID BIT(0) +#define AR933X_UART_INT_TX_READY BIT(1) +#define AR933X_UART_INT_RX_FRAMING_ERR BIT(2) +#define AR933X_UART_INT_RX_OFLOW_ERR BIT(3) +#define AR933X_UART_INT_TX_OFLOW_ERR BIT(4) +#define AR933X_UART_INT_RX_PARITY_ERR BIT(5) +#define AR933X_UART_INT_RX_BREAK_ON BIT(6) +#define AR933X_UART_INT_RX_BREAK_OFF BIT(7) +#define AR933X_UART_INT_RX_FULL BIT(8) +#define AR933X_UART_INT_TX_EMPTY BIT(9) +#define AR933X_UART_INT_ALLINTS 0x3ff + +#endif /* __AR933X_UART_H */ |