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Received: by mail-pa0-f43.google.com with SMTP id hz10so116113pad.2 for ; Mon, 03 Jun 2013 21:33:41 -0700 (PDT) X-Received: by 10.68.111.33 with SMTP id if1mr26233690pbb.31.1370320421293; Mon, 03 Jun 2013 21:33:41 -0700 (PDT) Received: from linaro.sisodomain.com ([115.113.119.130]) by mx.google.com with ESMTPSA id ya4sm61570412pbb.24.2013.06.03.21.33.36 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 03 Jun 2013 21:33:40 -0700 (PDT) From: Tushar Behera To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Cc: arnd@arndb.de, kgene.kim@samsung.com, olof@lixom.net, patches@linaro.org, Tomasz Figa Subject: [PATCH v2 3/3] ARM: s5p64x0: Use common uncompress.h part for plat-samsung Date: Tue, 4 Jun 2013 09:49:12 +0530 Message-Id: <1370319552-17694-4-git-send-email-tushar.behera@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1370319552-17694-1-git-send-email-tushar.behera@linaro.org> References: <1370319552-17694-1-git-send-email-tushar.behera@linaro.org> X-Gm-Message-State: ALoCoQnZTMm+jtHAk6HQ3YbqjaSj1gj1Y8mtEz+2vavau35bn9P9UJbt8FuYYW3JG1xXaqC376Ha X-Original-Sender: tushar.behera@linaro.org X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 2607:f8b0:400c:c02::22c is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Precedence: list Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org List-ID: X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , From: Tomasz Figa Since uart_base can be set dynamically in arch_detect_cpu(), there is no need to have a copy of all code locally, just to override UART base address. This patch removes any duplicate code in uncompress.h variant of s5p64x0 and implements proper arch_detect_cpu() function to initialize UART with SoC-specific parameters. While at it, replace hard-coded register address with macro. Signed-off-by: Tomasz Figa Signed-off-by: Tushar Behera --- (This patch replaces the original patch in this patchset as it was an earlier-posted near-identical patch.) Changes for v2: * Remove the declaration of uart_base (taken care in plat/uncompress.h) arch/arm/mach-s5p64x0/include/mach/uncompress.h | 162 +---------------------- 1 file changed, 6 insertions(+), 156 deletions(-) diff --git a/arch/arm/mach-s5p64x0/include/mach/uncompress.h b/arch/arm/mach-s5p64x0/include/mach/uncompress.h index 19e0d64..bc04bd5 100644 --- a/arch/arm/mach-s5p64x0/include/mach/uncompress.h +++ b/arch/arm/mach-s5p64x0/include/mach/uncompress.h @@ -14,171 +14,21 @@ #define __ASM_ARCH_UNCOMPRESS_H #include +#include -/* - * cannot use commonly - * because uart base of S5P6440 and S5P6450 is different - */ - -typedef unsigned int upf_t; /* cannot include linux/serial_core.h */ - -/* uart setup */ - -unsigned int fifo_mask; -unsigned int fifo_max; - -/* forward declerations */ - -static void arch_detect_cpu(void); - -/* defines for UART registers */ - -#include -#include - -/* working in physical space... */ -#undef S3C2410_WDOGREG -#define S3C2410_WDOGREG(x) ((S3C24XX_PA_WATCHDOG + (x))) - -/* how many bytes we allow into the FIFO at a time in FIFO mode */ -#define FIFO_MAX (14) - -unsigned long uart_base; - -static __inline__ void get_uart_base(void) +static void arch_detect_cpu(void) { unsigned int chipid; chipid = *(const volatile unsigned int __force *) 0xE0100118; - uart_base = S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT; - if ((chipid & 0xff000) == 0x50000) - uart_base += 0xEC800000; + uart_base = S5P6450_PA_UART(CONFIG_S3C_LOWLEVEL_UART_PORT); else - uart_base += 0xEC000000; -} - -static __inline__ void uart_wr(unsigned int reg, unsigned int val) -{ - volatile unsigned int *ptr; - - get_uart_base(); - ptr = (volatile unsigned int *)(reg + uart_base); - *ptr = val; -} - -static __inline__ unsigned int uart_rd(unsigned int reg) -{ - volatile unsigned int *ptr; - - get_uart_base(); - ptr = (volatile unsigned int *)(reg + uart_base); - return *ptr; -} - -/* - * we can deal with the case the UARTs are being run - * in FIFO mode, so that we don't hold up our execution - * waiting for tx to happen... - */ - -static void putc(int ch) -{ - if (uart_rd(S3C2410_UFCON) & S3C2410_UFCON_FIFOMODE) { - int level; - - while (1) { - level = uart_rd(S3C2410_UFSTAT); - level &= fifo_mask; - - if (level < fifo_max) - break; - } - - } else { - /* not using fifos */ - - while ((uart_rd(S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE) != S3C2410_UTRSTAT_TXE) - barrier(); - } + uart_base = S5P6440_PA_UART(CONFIG_S3C_LOWLEVEL_UART_PORT); - /* write byte to transmission register */ - uart_wr(S3C2410_UTXH, ch); -} - -static inline void flush(void) -{ -} - -#define __raw_writel(d, ad) \ - do { \ - *((volatile unsigned int __force *)(ad)) = (d); \ - } while (0) - - -#ifdef CONFIG_S3C_BOOT_ERROR_RESET - -static void arch_decomp_error(const char *x) -{ - putstr("\n\n"); - putstr(x); - putstr("\n\n -- System resetting\n"); - - __raw_writel(0x4000, S3C2410_WTDAT); - __raw_writel(0x4000, S3C2410_WTCNT); - __raw_writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128 | S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x40), S3C2410_WTCON); - - while(1); -} - -#define arch_error arch_decomp_error -#endif - -#ifdef CONFIG_S3C_BOOT_UART_FORCE_FIFO -static inline void arch_enable_uart_fifo(void) -{ - u32 fifocon = uart_rd(S3C2410_UFCON); - - if (!(fifocon & S3C2410_UFCON_FIFOMODE)) { - fifocon |= S3C2410_UFCON_RESETBOTH; - uart_wr(S3C2410_UFCON, fifocon); - - /* wait for fifo reset to complete */ - while (1) { - fifocon = uart_rd(S3C2410_UFCON); - if (!(fifocon & S3C2410_UFCON_RESETBOTH)) - break; - } - } -} -#else -#define arch_enable_uart_fifo() do { } while(0) -#endif - -static void arch_decomp_setup(void) -{ - /* - * we may need to setup the uart(s) here if we are not running - * on an BAST... the BAST will have left the uarts configured - * after calling linux. - */ - - arch_detect_cpu(); - - /* - * Enable the UART FIFOs if they where not enabled and our - * configuration says we should turn them on. - */ - - arch_enable_uart_fifo(); -} - - - -static void arch_detect_cpu(void) -{ - /* we do not need to do any cpu detection here at the moment. */ + fifo_mask = S3C2440_UFSTAT_TXMASK; + fifo_max = 63 << S3C2440_UFSTAT_TXSHIFT; } #endif /* __ASM_ARCH_UNCOMPRESS_H */