42c2544b2d
Add a notifier so that drivers can hook into SCU availability in order to take actions post initialisation when/if the SCU becomes available. In the ideal world we wouldn't need this and we could avoid any init dependancies of this form, but in practice we can't do it for some cases. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
#ifndef _ASM_X86_INTEL_SCU_IPC_H_
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#define _ASM_X86_INTEL_SCU_IPC_H_
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#include <linux/notifier.h>
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#define IPCMSG_VRTC 0xFA /* Set vRTC device */
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/* Command id associated with message IPCMSG_VRTC */
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#define IPC_CMD_VRTC_SETTIME 1 /* Set time */
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#define IPC_CMD_VRTC_SETALARM 2 /* Set alarm */
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/* Read single register */
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int intel_scu_ipc_ioread8(u16 addr, u8 *data);
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/* Read two sequential registers */
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int intel_scu_ipc_ioread16(u16 addr, u16 *data);
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/* Read four sequential registers */
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int intel_scu_ipc_ioread32(u16 addr, u32 *data);
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/* Read a vector */
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int intel_scu_ipc_readv(u16 *addr, u8 *data, int len);
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/* Write single register */
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int intel_scu_ipc_iowrite8(u16 addr, u8 data);
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/* Write two sequential registers */
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int intel_scu_ipc_iowrite16(u16 addr, u16 data);
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/* Write four sequential registers */
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int intel_scu_ipc_iowrite32(u16 addr, u32 data);
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/* Write a vector */
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int intel_scu_ipc_writev(u16 *addr, u8 *data, int len);
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/* Update single register based on the mask */
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int intel_scu_ipc_update_register(u16 addr, u8 data, u8 mask);
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/* Issue commands to the SCU with or without data */
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int intel_scu_ipc_simple_command(int cmd, int sub);
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int intel_scu_ipc_command(int cmd, int sub, u32 *in, int inlen,
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u32 *out, int outlen);
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/* I2C control api */
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int intel_scu_ipc_i2c_cntrl(u32 addr, u32 *data);
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/* Update FW version */
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int intel_scu_ipc_fw_update(u8 *buffer, u32 length);
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extern struct blocking_notifier_head intel_scu_notifier;
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static inline void intel_scu_notifier_add(struct notifier_block *nb)
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{
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blocking_notifier_chain_register(&intel_scu_notifier, nb);
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}
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static inline void intel_scu_notifier_remove(struct notifier_block *nb)
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{
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blocking_notifier_chain_unregister(&intel_scu_notifier, nb);
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}
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static inline int intel_scu_notifier_post(unsigned long v, void *p)
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{
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return blocking_notifier_call_chain(&intel_scu_notifier, v, p);
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}
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#define SCU_AVAILABLE 1
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#define SCU_DOWN 2
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#endif
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