diff options
| author |   Andy Ross <andy.ross@windriver.com> | 2010-07-26 10:05:03 +0100 |
|---|---|---|
| committer |   Matthew Garrett <mjg@redhat.com> | 2010-08-03 09:50:32 -0400 |
| commit | 6c8d0fdbe88e8bb1a07fa9a2830767cc180f7d1b (patch) | |
| tree | 498f41d73ee97d633c6f7cea6a3db726eb88bc51 | |
| parent | zero the stack buffer before giving random garbage to the SCU (diff) | |
Clean up command packing on MRST.
Don't pass more bytes in the command length field than we filled.
Signed-off-by: Andy Ross <andy.ross@windriver.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
| -rw-r--r-- | drivers/platform/x86/intel_scu_ipc.c | 29 |
1 files changed, 11 insertions, 18 deletions
diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c index b903420fa973..5055c523c5e2 100644 --- a/drivers/platform/x86/intel_scu_ipc.c +++ b/drivers/platform/x86/intel_scu_ipc.c @@ -154,7 +154,7 @@ static inline int busy_loop(void) /* Wait till scu status is busy */ /* Read/Write power control(PMIC in Langwell, MSIC in PenWell) registers */ static int pwr_reg_rdwr(u16 *addr, u8 *data, u32 count, u32 op, u32 id) { - int nc; + int i, nc, bytes; u32 offset = 0; u32 err = 0; u8 cbuf[IPC_WWBUF_SIZE] = { }; @@ -170,25 +170,18 @@ static int pwr_reg_rdwr(u16 *addr, u8 *data, u32 count, u32 op, u32 id) } if (platform != MRST_CPU_CHIP_PENWELL) { - /* Entry is 4 bytes for read/write, 5 bytes for read modify */ - for (nc = 0; nc < count; nc++, offset += 3) { - cbuf[offset] = addr[nc]; - cbuf[offset + 1] = addr[nc] >> 8; + bytes = 0; + for(i=0; i<count; i++) { + cbuf[bytes++] = addr[i]; + cbuf[bytes++] = addr[i] >> 8; if (id != IPC_CMD_PCNTRL_R) - cbuf[offset + 2] = data[nc]; - if (id == IPC_CMD_PCNTRL_M) { - cbuf[offset + 3] = data[nc + 1]; - offset += 1; - } + cbuf[bytes++] = data[i]; + if (id == IPC_CMD_PCNTRL_M) + cbuf[bytes++] = data[i + 1]; } - for (nc = 0, offset = 0; nc < count; nc++, offset += 4) - ipc_data_writel(wbuf[nc], offset); /* Write wbuff */ - - if (id != IPC_CMD_PCNTRL_M) - ipc_command((count*4) << 16 | id << 12 | 0 << 8 | op); - else - ipc_command((count*5) << 16 | id << 12 | 0 << 8 | op); - + for(i=0; i<bytes; i+=4) + ipc_data_writel(wbuf[i/4], i); + ipc_command(bytes << 16 | id << 12 | 0 << 8 | op); } else { for (nc = 0; nc < count; nc++, offset += 2) { cbuf[offset] = addr[nc]; |