net/ipa/ipa_uc.c

16  * DOC:  The IPA embedded microcontroller
18  * The IPA incorporates a microcontroller that is able to do some additional
20  * essentially no use of the microcontroller, but it still requires some
23  * The microcontroller can generate two interrupts to the AP.  One interrupt
26  * addition, the AP can interrupt the microcontroller by writing a register.
30  * AP and the IPA microcontroller.  Each side writes data to the shared area
38 /* Delay to allow a the microcontroller to save state when crashing */
42  * struct ipa_uc_mem_area - AP/microcontroller shared memory area
43  * @command:		command code (AP->microcontroller)
45  * @command_param:	low 32 bits of command parameter (AP->microcontroller)
46  * @command_param_hi:	high 32 bits of command parameter (AP->microcontroller)
48  * @response:		response code (microcontroller->AP)
50  * @response_param:	response parameter (microcontroller->AP)
52  * @event:		event code (microcontroller->AP)
54  * @event_param:	event parameter (microcontroller->AP)
64  * communication with the microcontroller.  The region is 128 bytes in
87 /** enum ipa_uc_command - commands from the AP to the microcontroller */
102 /** enum ipa_uc_response - microcontroller response codes */
110 /** enum ipa_uc_event - common cpu events reported by the microcontroller */
124 /* Microcontroller event IPA interrupt handler */
131 		dev_err(dev, "microcontroller error event\n");  in ipa_uc_event_handler()
133 		dev_err(dev, "unsupported microcontroller event %hhu\n",  in ipa_uc_event_handler()
137 /* Microcontroller response IPA interrupt handler */
143 	 * microcontroller when it is operational.  Other than this, the AP  in ipa_uc_response_hdlr()
144 	 * should only receive responses from the microcontroller when it has  in ipa_uc_response_hdlr()
148 	 * know the microcontroller has finished its initialization.  in ipa_uc_response_hdlr()
157 			 "unsupported microcontroller response %hhu\n",  in ipa_uc_response_hdlr()
163 /* ipa_uc_setup() - Set up the microcontroller */
166 	/* The microcontroller needs the IPA clock running until it has  in ipa_uc_setup()
190 /* Send a command to the microcontroller */
204 /* Tell the microcontroller the AP is shutting down */