net/ipa/ipa_uc.c

19  * DOC:  The IPA embedded microcontroller
21  * The IPA incorporates a microcontroller that is able to do some additional
23  * essentially no use of the microcontroller, but it still requires some
26  * The microcontroller can generate two interrupts to the AP.  One interrupt
29  * addition, the AP can interrupt the microcontroller by writing a register.
33  * AP and the IPA microcontroller.  Each side writes data to the shared area
41 /* Delay to allow a the microcontroller to save state when crashing */
45  * struct ipa_uc_mem_area - AP/microcontroller shared memory area
46  * @command:		command code (AP->microcontroller)
48  * @command_param:	low 32 bits of command parameter (AP->microcontroller)
49  * @command_param_hi:	high 32 bits of command parameter (AP->microcontroller)
51  * @response:		response code (microcontroller->AP)
53  * @response_param:	response parameter (microcontroller->AP)
55  * @event:		event code (microcontroller->AP)
57  * @event_param:	event parameter (microcontroller->AP)
67  * communication with the microcontroller.  The region is 128 bytes in
90 /** enum ipa_uc_command - commands from the AP to the microcontroller */
105 /** enum ipa_uc_response - microcontroller response codes */
113 /** enum ipa_uc_event - common cpu events reported by the microcontroller */
128 /* Microcontroller event IPA interrupt handler */
135 		dev_err(dev, "microcontroller error event\n");  in ipa_uc_event_handler()
137 		dev_err(dev, "unsupported microcontroller event %u\n",  in ipa_uc_event_handler()
142 /* Microcontroller response IPA interrupt handler */
149 	 * microcontroller when it is operational.  Other than this, the AP  in ipa_uc_response_hdlr()
150 	 * should only receive responses from the microcontroller when it has  in ipa_uc_response_hdlr()
154 	 * know the microcontroller has finished its initialization.  in ipa_uc_response_hdlr()
169 		dev_warn(dev, "unsupported microcontroller response %u\n",  in ipa_uc_response_hdlr()
184 /* Configure the IPA microcontroller subsystem */
210 /* Take a proxy power reference for the microcontroller */
231 /* Send a command to the microcontroller */
245 	/* Use an interrupt to tell the microcontroller the command is ready */  in send_uc_command()
252 /* Tell the microcontroller the AP is shutting down */