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| author | Jun Tian <jun.j.tian@intel.com> | 2014-05-12 17:54:46 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-15 22:19:00 +0200 |
| commit | 49a75c444fcf07fdde2ec74428b6b1b9ff1c6b15 (patch) | |
| tree | 96dd3d0e6f959544d039aaeee54ffeaa57ba0dbe /drivers/platform | |
| parent | staging: rtl8723au: Remove unused pointer in rtw_wdev_free() (diff) | |
| download | linux-49a75c444fcf07fdde2ec74428b6b1b9ff1c6b15.tar.xz linux-49a75c444fcf07fdde2ec74428b6b1b9ff1c6b15.zip | |
goldfish: 64-bit pipe driver for goldfish platform
Support 64-bit channel and address for the goldfish pipe driver.
Signed-off-by: Jun Tian <jun.j.tian@intel.com>
Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: Brian Wood <brian.j.wood@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/goldfish/goldfish_pipe.c | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c index 4f5aa831f549..f33c6e0e7fb0 100644 --- a/drivers/platform/goldfish/goldfish_pipe.c +++ b/drivers/platform/goldfish/goldfish_pipe.c @@ -66,8 +66,14 @@ #define PIPE_REG_COMMAND 0x00 /* write: value = command */ #define PIPE_REG_STATUS 0x04 /* read */ #define PIPE_REG_CHANNEL 0x08 /* read/write: channel id */ +#ifdef CONFIG_64BIT +#define PIPE_REG_CHANNEL_HIGH 0x30 /* read/write: channel id */ +#endif #define PIPE_REG_SIZE 0x0c /* read/write: buffer size */ #define PIPE_REG_ADDRESS 0x10 /* write: physical address */ +#ifdef CONFIG_64BIT +#define PIPE_REG_ADDRESS_HIGH 0x34 /* write: physical address */ +#endif #define PIPE_REG_WAKES 0x14 /* read: wake flags */ #define PIPE_REG_PARAMS_ADDR_LOW 0x18 /* read/write: batch data address */ #define PIPE_REG_PARAMS_ADDR_HIGH 0x1c /* read/write: batch data address */ @@ -109,9 +115,9 @@ #define PIPE_WAKE_WRITE (1 << 2) /* pipe can now be written to */ struct access_params { - u32 channel; + unsigned long channel; u32 size; - u32 address; + unsigned long address; u32 cmd; u32 result; /* reserved for future extension */ @@ -155,7 +161,10 @@ static u32 goldfish_cmd_status(struct goldfish_pipe *pipe, u32 cmd) struct goldfish_pipe_dev *dev = pipe->dev; spin_lock_irqsave(&dev->lock, flags); - writel((u32)pipe, dev->base + PIPE_REG_CHANNEL); + writel((u32)(u64)pipe, dev->base + PIPE_REG_CHANNEL); +#ifdef CONFIG_64BIT + writel((u32)((u64)pipe >> 32), dev->base + PIPE_REG_CHANNEL_HIGH); +#endif writel(cmd, dev->base + PIPE_REG_COMMAND); status = readl(dev->base + PIPE_REG_STATUS); spin_unlock_irqrestore(&dev->lock, flags); @@ -168,7 +177,10 @@ static void goldfish_cmd(struct goldfish_pipe *pipe, u32 cmd) struct goldfish_pipe_dev *dev = pipe->dev; spin_lock_irqsave(&dev->lock, flags); - writel((u32)pipe, dev->base + PIPE_REG_CHANNEL); + writel((u32)(u64)pipe, dev->base + PIPE_REG_CHANNEL); +#ifdef CONFIG_64BIT + writel((u32)((u64)pipe >> 32), dev->base + PIPE_REG_CHANNEL_HIGH); +#endif writel(cmd, dev->base + PIPE_REG_COMMAND); spin_unlock_irqrestore(&dev->lock, flags); } @@ -322,9 +334,15 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer, spin_lock_irqsave(&dev->lock, irq_flags); if (access_with_param(dev, CMD_WRITE_BUFFER + cmd_offset, address, avail, pipe, &status)) { - writel((u32)pipe, dev->base + PIPE_REG_CHANNEL); + writel((u32)(u64)pipe, dev->base + PIPE_REG_CHANNEL); +#ifdef CONFIG_64BIT + writel((u32)((u64)pipe >> 32), dev->base + PIPE_REG_CHANNEL_HIGH); +#endif writel(avail, dev->base + PIPE_REG_SIZE); writel(address, dev->base + PIPE_REG_ADDRESS); +#ifdef CONFIG_64BIT + writel((u32)((u64)address >> 32), dev->base + PIPE_REG_ADDRESS_HIGH); +#endif writel(CMD_WRITE_BUFFER + cmd_offset, dev->base + PIPE_REG_COMMAND); status = readl(dev->base + PIPE_REG_STATUS); @@ -447,7 +465,12 @@ static irqreturn_t goldfish_pipe_interrupt(int irq, void *dev_id) /* First read the channel, 0 means the end of the list */ struct goldfish_pipe *pipe; unsigned long wakes; - unsigned long channel = readl(dev->base + PIPE_REG_CHANNEL); + unsigned long channel = 0; + +#ifdef CONFIG_64BIT + channel = (u64)readl(dev->base + PIPE_REG_CHANNEL_HIGH) << 32; +#endif + channel |= readl(dev->base + PIPE_REG_CHANNEL); if (channel == 0) break; |