1 // SPDX-License-Identifier: GPL-2.0-or-later
6  * Copyright (C) 2008-2009 The GameCube Linux Team
33 #define   EXI_CR_TLEN(len)      (((len)-1)<<4)
51 	u32 csr, data, cr;  in ug_io_transaction()  local
58 	data = in;  in ug_io_transaction()
59 	out_be32(data_reg, data);  in ug_io_transaction()
70 	data = in_be32(data_reg);  in ug_io_transaction()
72 	return data;  in ug_io_transaction()
87  * Returns true if the TX fifo is ready for transmission.
96  * If the TX fifo is not ready the result is undefined.
105  * It silently fails if the TX fifo is not ready after a number of retries.
117 	while (!ug_is_txfifo_ready() && count--)  in ug_putc()
124  * Returns true if the RX fifo is ready for transmission.
133  * If a character is unavailable the function returns -1.
137 	u32 data = ug_io_transaction(0xa0000000);  in ug_raw_getc()  local
138 	if (data & 0x08000000)  in ug_raw_getc()
139 		return (data >> 16) & 0xff;  in ug_raw_getc()
141 		return -1;  in ug_raw_getc()
146  * It fails if the RX fifo is not ready after a number of retries.
153 		return -1;  in ug_getc()
155 	while (!ug_is_rxfifo_ready() && count--)  in ug_getc()
180 	while ((ch = ug_getc()) == -1)  in ug_udbg_getc()
186  * Receives a character. If a character is not available, returns -1.
191 		return -1;  in ug_udbg_getc_poll()
223 		udbg_printf("%s: early -> final\n", __func__);  in ug_udbg_init()
225 	np = of_find_compatible_node(NULL, NULL, "nintendo,flipper-exi");  in ug_udbg_init()
244 		udbg_printf("usbgecko_udbg: ready\n");  in ug_udbg_init()