forked from Minki/linux
goldfish: enable 64-bit tty driver
Signed-off-by: Jun Tian <jun.j.tian@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -29,6 +29,9 @@ enum {
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GOLDFISH_TTY_DATA_PTR = 0x10,
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GOLDFISH_TTY_DATA_LEN = 0x14,
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#ifdef CONFIG_64BIT
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GOLDFISH_TTY_DATA_PTR_HIGH = 0x18,
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#endif
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GOLDFISH_TTY_CMD_INT_DISABLE = 0,
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GOLDFISH_TTY_CMD_INT_ENABLE = 1,
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@ -58,6 +61,9 @@ static void goldfish_tty_do_write(int line, const char *buf, unsigned count)
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void __iomem *base = qtty->base;
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spin_lock_irqsave(&qtty->lock, irq_flags);
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writel((u32)buf, base + GOLDFISH_TTY_DATA_PTR);
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#ifdef CONFIG_64BIT
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writel((u32)((u64)buf >> 32), base + GOLDFISH_TTY_DATA_PTR_HIGH);
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#endif
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writel(count, base + GOLDFISH_TTY_DATA_LEN);
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writel(GOLDFISH_TTY_CMD_WRITE_BUFFER, base + GOLDFISH_TTY_CMD);
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spin_unlock_irqrestore(&qtty->lock, irq_flags);
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@ -79,6 +85,9 @@ static irqreturn_t goldfish_tty_interrupt(int irq, void *dev_id)
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count = tty_prepare_flip_string(&qtty->port, &buf, count);
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spin_lock_irqsave(&qtty->lock, irq_flags);
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writel((u32)buf, base + GOLDFISH_TTY_DATA_PTR);
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#ifdef CONFIG_64BIT
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writel((u32)((u64)buf >> 32), base + GOLDFISH_TTY_DATA_PTR_HIGH);
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#endif
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writel(count, base + GOLDFISH_TTY_DATA_LEN);
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writel(GOLDFISH_TTY_CMD_READ_BUFFER, base + GOLDFISH_TTY_CMD);
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spin_unlock_irqrestore(&qtty->lock, irq_flags);
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