diff options
Diffstat (limited to 'target/linux/ar71xx/patches-3.2/006-MIPS-ath79-Add-early-printk-support-for-the-AR933X-S.patch')
| -rw-r--r-- | target/linux/ar71xx/patches-3.2/006-MIPS-ath79-Add-early-printk-support-for-the-AR933X-S.patch | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-3.2/006-MIPS-ath79-Add-early-printk-support-for-the-AR933X-S.patch b/target/linux/ar71xx/patches-3.2/006-MIPS-ath79-Add-early-printk-support-for-the-AR933X-S.patch new file mode 100644 index 0000000000..557700899d --- /dev/null +++ b/target/linux/ar71xx/patches-3.2/006-MIPS-ath79-Add-early-printk-support-for-the-AR933X-S.patch @@ -0,0 +1,208 @@ +From 84ead7964e423c37a73da30a1a2c4c486f74242d Mon Sep 17 00:00:00 2001 +From: Gabor Juhos <juhosg@openwrt.org> +Date: Mon, 20 Jun 2011 21:26:03 +0200 +Subject: [PATCH 06/27] MIPS: ath79: Add early printk support for the AR933X SoCs + +The AR933X SoCs are using a different UART, thus require +different code for early printk support. + +Signed-off-by: Gabor Juhos <juhosg@openwrt.org> +Cc: linux-mips@linux-mips.org +Cc: Kathy Giori <kgiori@qca.qualcomm.com> +Cc: "Luis R. Rodriguez" <rodrigue@qca.qualcomm.com> +Patchwork: https://patchwork.linux-mips.org/patch/2521/ +Signed-off-by: Ralf Baechle <ralf@linux-mips.org> +--- + arch/mips/ath79/early_printk.c | 76 +++++++++++++++++++++--- + arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 3 + + arch/mips/include/asm/mach-ath79/ar933x_uart.h | 67 +++++++++++++++++++++ + 3 files changed, 137 insertions(+), 9 deletions(-) + create mode 100644 arch/mips/include/asm/mach-ath79/ar933x_uart.h + +--- 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); + } +--- 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 + */ +--- /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 */ |