Lines Matching +full:- +full:uart

1 /* SPDX-License-Identifier: GPL-2.0-only */
4  * Copyright (C) 2011-2012 NVIDIA CORPORATION. All Rights Reserved.
12  * Portions based on mach-omap2's debug-macro.S
13  * Copyright (C) 1994-1999 Russell King
40  * Must be section-aligned since a section mapping is used early on.
41  * Must not overlap with regions in mach-tegra/io.c:tegra_io_desc[].
45 #define checkuart(rp, rv, lhu, bit, uart) \  argument
50 		/* Test UART's reset bit */ \
52 		/* If set, can't use UART; jump to save no UART */ \
58 		/* Test UART's clock enable bit */ \
60 		/* If clear, can't use UART; jump to save no UART */ \
62 		/* Passed all tests, load address of UART registers */ \
63 		ldr	rp, =TEGRA_UART##uart##_BASE ; \
64 		/* Jump to save UART address */ \
85 		cmp	\rv, #2			@ 2 and 3 mean DCC, UART
89 11:		lsr	\rv, \rp, #15		@ 17:15 are UART ID
91 		cmp	\rv, #0			@ UART 0?
93 		cmp	\rv, #1			@ UART 1?
95 		cmp	\rv, #2			@ UART 2?
97 		cmp	\rv, #3			@ UART 3?
99 		cmp	\rv, #4			@ UART 4?
106 		/* Check UART A validity */
112 		/* Check UART B validity */
118 		/* Check UART C validity */
124 		/* Check UART D validity */
130 		/* Check UART E validity */
135 		/* No valid UART found */
139 		/* Record whichever UART we chose */
141 		cmp	\rp, #0			@ Valid UART address?
157  * In the kernel proper, this data is located in arch/arm/mach-tegra/tegra.c.
159  * want a single copy of the data. In particular, the UART probing code above
163  * to re-run the probing again later.
171 		/* Debug UART initialization required */
173 		/* Debug UART physical address */
175 		/* Debug UART virtual address */
182 		/* Load previously selected UART address */
188  * Code below is swiped from <asm/hardware/debug-8250.S>, but add an extra
189  * check to make sure that the UART address is actually valid.