diff options
Diffstat (limited to 'arch/arm/mach-ns9xxx/include/mach/uncompress.h')
| -rw-r--r-- | arch/arm/mach-ns9xxx/include/mach/uncompress.h | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/arch/arm/mach-ns9xxx/include/mach/uncompress.h b/arch/arm/mach-ns9xxx/include/mach/uncompress.h new file mode 100644 index 000000000000..5dbc3c5167c8 --- /dev/null +++ b/arch/arm/mach-ns9xxx/include/mach/uncompress.h @@ -0,0 +1,164 @@ +/* + * arch/arm/mach-ns9xxx/include/mach/uncompress.h + * + * Copyright (C) 2006 by Digi International Inc. + * All rights reserved. + * + * 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 __ASM_ARCH_UNCOMPRESS_H +#define __ASM_ARCH_UNCOMPRESS_H + +#include <asm/io.h> + +#define __REG(x) ((void __iomem __force *)(x)) + +static void putc_dummy(char c, void __iomem *base) +{ + /* nothing */ +} + +static void putc_ns9360(char c, void __iomem *base) +{ + static int t = 0x10000; + do { + if (t) + --t; + + if (__raw_readl(base + 8) & (1 << 3)) { + __raw_writeb(c, base + 16); + t = 0x10000; + break; + } + } while (t); +} + +static void putc_a9m9750dev(char c, void __iomem *base) +{ + static int t = 0x10000; + do { + if (t) + --t; + + if (__raw_readb(base + 5) & (1 << 5)) { + __raw_writeb(c, base); + t = 0x10000; + break; + } + } while (t); + +} + +static void putc_ns921x(char c, void __iomem *base) +{ + static int t = 0x10000; + do { + if (t) + --t; + + if (!(__raw_readl(base) & (1 << 11))) { + __raw_writeb(c, base + 0x0028); + t = 0x10000; + break; + } + } while (t); +} + +#define MSCS __REG(0xA0900184) + +#define NS9360_UARTA __REG(0x90200040) +#define NS9360_UARTB __REG(0x90200000) +#define NS9360_UARTC __REG(0x90300000) +#define NS9360_UARTD __REG(0x90300040) + +#define NS9360_UART_ENABLED(base) \ + (__raw_readl(NS9360_UARTA) & (1 << 31)) + +#define A9M9750DEV_UARTA __REG(0x40000000) + +#define NS921XSYS_CLOCK __REG(0xa090017c) +#define NS921X_UARTA __REG(0x90010000) +#define NS921X_UARTB __REG(0x90018000) +#define NS921X_UARTC __REG(0x90020000) +#define NS921X_UARTD __REG(0x90028000) + +#define NS921X_UART_ENABLED(base) \ + (__raw_readl((base) + 0x1000) & (1 << 29)) + +static void autodetect(void (**putc)(char, void __iomem *), void __iomem **base) +{ + if (((__raw_readl(MSCS) >> 16) & 0xfe) == 0x00) { + /* ns9360 or ns9750 */ + if (NS9360_UART_ENABLED(NS9360_UARTA)) { + *putc = putc_ns9360; + *base = NS9360_UARTA; + return; + } else if (NS9360_UART_ENABLED(NS9360_UARTB)) { + *putc = putc_ns9360; + *base = NS9360_UARTB; + return; + } else if (NS9360_UART_ENABLED(NS9360_UARTC)) { + *putc = putc_ns9360; + *base = NS9360_UARTC; + return; + } else if (NS9360_UART_ENABLED(NS9360_UARTD)) { + *putc = putc_ns9360; + *base = NS9360_UARTD; + return; + } else if (__raw_readl(__REG(0xa09001f4)) == 0xfffff001) { + *putc = putc_a9m9750dev; + *base = A9M9750DEV_UARTA; + return; + } + } else if (((__raw_readl(MSCS) >> 16) & 0xfe) == 0x02) { + /* ns921x */ + u32 clock = __raw_readl(NS921XSYS_CLOCK); + + if ((clock & (1 << 1)) && + NS921X_UART_ENABLED(NS921X_UARTA)) { + *putc = putc_ns921x; + *base = NS921X_UARTA; + return; + } else if ((clock & (1 << 2)) && + NS921X_UART_ENABLED(NS921X_UARTB)) { + *putc = putc_ns921x; + *base = NS921X_UARTB; + return; + } else if ((clock & (1 << 3)) && + NS921X_UART_ENABLED(NS921X_UARTC)) { + *putc = putc_ns921x; + *base = NS921X_UARTC; + return; + } else if ((clock & (1 << 4)) && + NS921X_UART_ENABLED(NS921X_UARTD)) { + *putc = putc_ns921x; + *base = NS921X_UARTD; + return; + } + } + + *putc = putc_dummy; +} + +void (*myputc)(char, void __iomem *); +void __iomem *base; + +static void putc(char c) +{ + myputc(c, base); +} + +static void arch_decomp_setup(void) +{ + autodetect(&myputc, &base); +} +#define arch_decomp_wdog() + +static void flush(void) +{ + /* nothing */ +} + +#endif /* ifndef __ASM_ARCH_UNCOMPRESS_H */ |