u-boot/arch/arm/mach-uniphier/arm32/debug_ll.S
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

165 lines
3.4 KiB
ArmAsm

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* On-chip UART initializaion for low-level debugging
*
* Copyright (C) 2014-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
*/
#include <linux/serial_reg.h>
#include <linux/linkage.h>
#include "../bcu/bcu-regs.h"
#include "../sc-regs.h"
#include "../sg-regs.h"
#if !defined(CONFIG_DEBUG_SEMIHOSTING)
#include CONFIG_DEBUG_LL_INCLUDE
#endif
#define BAUDRATE 115200
#define DIV_ROUND(x, d) (((x) + ((d) / 2)) / (d))
ENTRY(debug_ll_init)
ldr r0, =SG_REVISION
ldr r1, [r0]
and r1, r1, #SG_REVISION_TYPE_MASK
mov r1, r1, lsr #SG_REVISION_TYPE_SHIFT
#if defined(CONFIG_ARCH_UNIPHIER_LD4)
#define UNIPHIER_LD4_UART_CLK 36864000
cmp r1, #0x26
bne ld4_end
ldr r0, =SG_IECTRL
ldr r1, [r0]
orr r1, r1, #1
str r1, [r0]
sg_set_pinsel 88, 1, 8, 4, r0, r1 @ HSDOUT6 -> TXD0
ldr r3, =DIV_ROUND(UNIPHIER_LD4_UART_CLK, 16 * BAUDRATE)
b init_uart
ld4_end:
#endif
#if defined(CONFIG_ARCH_UNIPHIER_PRO4)
#define UNIPHIER_PRO4_UART_CLK 73728000
cmp r1, #0x28
bne pro4_end
sg_set_pinsel 128, 0, 4, 8, r0, r1 @ TXD0 -> TXD0
ldr r0, =SG_LOADPINCTRL
mov r1, #1
str r1, [r0]
ldr r0, =SC_CLKCTRL
ldr r1, [r0]
orr r1, r1, #SC_CLKCTRL_CEN_PERI
str r1, [r0]
ldr r3, =DIV_ROUND(UNIPHIER_PRO4_UART_CLK, 16 * BAUDRATE)
b init_uart
pro4_end:
#endif
#if defined(CONFIG_ARCH_UNIPHIER_SLD8)
#define UNIPHIER_SLD8_UART_CLK 80000000
cmp r1, #0x29
bne sld8_end
ldr r0, =SG_IECTRL
ldr r1, [r0]
orr r1, r1, #1
str r1, [r0]
sg_set_pinsel 70, 3, 8, 4, r0, r1 @ HSDOUT0 -> TXD0
ldr r3, =DIV_ROUND(UNIPHIER_SLD8_UART_CLK, 16 * BAUDRATE)
b init_uart
sld8_end:
#endif
#if defined(CONFIG_ARCH_UNIPHIER_PRO5)
#define UNIPHIER_PRO5_UART_CLK 73728000
cmp r1, #0x2A
bne pro5_end
sg_set_pinsel 47, 0, 4, 8, r0, r1 @ TXD0 -> TXD0
sg_set_pinsel 49, 0, 4, 8, r0, r1 @ TXD1 -> TXD1
sg_set_pinsel 51, 0, 4, 8, r0, r1 @ TXD2 -> TXD2
sg_set_pinsel 53, 0, 4, 8, r0, r1 @ TXD3 -> TXD3
ldr r0, =SG_LOADPINCTRL
mov r1, #1
str r1, [r0]
ldr r0, =SC_CLKCTRL
ldr r1, [r0]
orr r1, r1, #SC_CLKCTRL_CEN_PERI
str r1, [r0]
ldr r3, =DIV_ROUND(UNIPHIER_PRO5_UART_CLK, 16 * BAUDRATE)
b init_uart
pro5_end:
#endif
#if defined(CONFIG_ARCH_UNIPHIER_PXS2)
#define UNIPHIER_PXS2_UART_CLK 88900000
cmp r1, #0x2E
bne pxs2_end
ldr r0, =SG_IECTRL
ldr r1, [r0]
orr r1, r1, #1
str r1, [r0]
sg_set_pinsel 217, 8, 8, 4, r0, r1 @ TXD0 -> TXD0
sg_set_pinsel 115, 8, 8, 4, r0, r1 @ TXD1 -> TXD1
sg_set_pinsel 113, 8, 8, 4, r0, r1 @ TXD2 -> TXD2
sg_set_pinsel 219, 8, 8, 4, r0, r1 @ TXD3 -> TXD3
ldr r0, =SC_CLKCTRL
ldr r1, [r0]
orr r1, r1, #SC_CLKCTRL_CEN_PERI
str r1, [r0]
ldr r3, =DIV_ROUND(UNIPHIER_PXS2_UART_CLK, 16 * BAUDRATE)
b init_uart
pxs2_end:
#endif
#if defined(CONFIG_ARCH_UNIPHIER_LD6B)
#define UNIPHIER_LD6B_UART_CLK 88900000
cmp r1, #0x2F
bne ld6b_end
ldr r0, =SG_IECTRL
ldr r1, [r0]
orr r1, r1, #1
str r1, [r0]
sg_set_pinsel 135, 3, 8, 4, r0, r1 @ PORT10 -> TXD0
sg_set_pinsel 115, 0, 8, 4, r0, r1 @ TXD1 -> TXD1
sg_set_pinsel 113, 2, 8, 4, r0, r1 @ SBO0 -> TXD2
ldr r0, =SC_CLKCTRL
ldr r1, [r0]
orr r1, r1, #SC_CLKCTRL_CEN_PERI
str r1, [r0]
ldr r3, =DIV_ROUND(UNIPHIER_LD6B_UART_CLK, 16 * BAUDRATE)
b init_uart
ld6b_end:
#endif
mov pc, lr
init_uart:
addruart r0, r1, r2
mov r1, #UART_LCR_WLEN8 << 8
str r1, [r0, #0x10]
str r3, [r0, #0x24]
mov pc, lr
ENDPROC(debug_ll_init)