[PATCH v2 03/28] i.MX: Add DEBUG_LL hooks for VF610
Andrey Smirnov
andrew.smirnov at gmail.com
Wed Nov 9 08:13:51 PST 2016
Add code to support DEBUG_LL functionality on VF610/Vybrid platform.
Signed-off-by: Andrey Smirnov <andrew.smirnov at gmail.com>
---
arch/arm/mach-imx/include/mach/debug_ll.h | 27 ++-
common/Kconfig | 10 +-
include/serial/lpuart.h | 281 ++++++++++++++++++++++++++++++
3 files changed, 316 insertions(+), 2 deletions(-)
create mode 100644 include/serial/lpuart.h
diff --git a/arch/arm/mach-imx/include/mach/debug_ll.h b/arch/arm/mach-imx/include/mach/debug_ll.h
index 5c2db6c..a132f3c 100644
--- a/arch/arm/mach-imx/include/mach/debug_ll.h
+++ b/arch/arm/mach-imx/include/mach/debug_ll.h
@@ -14,8 +14,10 @@
#include <mach/imx51-regs.h>
#include <mach/imx53-regs.h>
#include <mach/imx6-regs.h>
+#include <mach/vf610-regs.h>
#include <serial/imx-uart.h>
+#include <serial/lpuart.h>
#ifdef CONFIG_DEBUG_LL
@@ -42,6 +44,8 @@
#define IMX_DEBUG_SOC MX53
#elif defined CONFIG_DEBUG_IMX6Q_UART
#define IMX_DEBUG_SOC MX6
+#elif defined CONFIG_DEBUG_VF610_UART
+#define IMX_DEBUG_SOC VF610
#else
#error "unknown i.MX debug uart soc type"
#endif
@@ -74,6 +78,13 @@ static inline void imx6_uart_setup_ll(void)
imx6_uart_setup(base);
}
+static inline void vf610_uart_setup_ll(void)
+{
+ void *base = IOMEM(IMX_UART_BASE(IMX_DEBUG_SOC, CONFIG_DEBUG_IMX_UART_PORT));
+
+ lpuart_setup(base, 66000000);
+}
+
static inline void PUTC_LL(int c)
{
void __iomem *base = IOMEM(IMX_UART_BASE(IMX_DEBUG_SOC,
@@ -82,14 +93,19 @@ static inline void PUTC_LL(int c)
if (!base)
return;
- imx_uart_putc(base, c);
+ if (IS_ENABLED(CONFIG_DEBUG_VF610_UART))
+ lpuart_putc(base, c);
+ else
+ imx_uart_putc(base, c);
}
+
#else
static inline void imx50_uart_setup_ll(void) {}
static inline void imx51_uart_setup_ll(void) {}
static inline void imx53_uart_setup_ll(void) {}
static inline void imx6_uart_setup_ll(void) {}
+static inline void vf610_uart_setup_ll(void) {}
#endif /* CONFIG_DEBUG_LL */
@@ -115,4 +131,13 @@ static inline void imx53_ungate_all_peripherals(void)
imx_ungate_all_peripherals(IOMEM(MX53_CCM_BASE_ADDR));
}
+static inline void vf610_ungate_all_peripherals(void)
+{
+ void __iomem *ccmbase = IOMEM(VF610_CCM_BASE_ADDR);
+ int i;
+
+ for (i = 0x40; i <= 0x6c; i += 4)
+ writel(0xffffffff, ccmbase + i);
+}
+
#endif /* __MACH_DEBUG_LL_H__ */
diff --git a/common/Kconfig b/common/Kconfig
index efd1949..ed472a0 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -1071,6 +1071,13 @@ config DEBUG_IMX6Q_UART
Say Y here if you want kernel low-level debugging support
on i.MX6Q.
+config DEBUG_VF610_UART
+ bool "VF610 Debug UART"
+ depends on ARCH_VF610
+ help
+ Say Y here if you want kernel low-level debugging support
+ on VF610.
+
config DEBUG_OMAP3_UART
bool "OMAP3 Debug UART"
depends on ARCH_OMAP3
@@ -1111,7 +1118,8 @@ config DEBUG_IMX_UART_PORT
DEBUG_IMX51_UART || \
DEBUG_IMX53_UART || \
DEBUG_IMX6Q_UART || \
- DEBUG_IMX6SL_UART
+ DEBUG_IMX6SL_UART || \
+ DEBUG_VF610_UART
default 1
depends on ARCH_IMX
help
diff --git a/include/serial/lpuart.h b/include/serial/lpuart.h
new file mode 100644
index 0000000..917f644
--- /dev/null
+++ b/include/serial/lpuart.h
@@ -0,0 +1,281 @@
+/*
+ * Copyright (c) 2016 Zodiac Inflight Innovation
+ * Author: Andrey Smirnov <andrew.smirnov at gmail.com>
+ *
+ * Based on code found in Linux kernel and U-Boot.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __LPUART_H__
+#define __LPUART_H__
+
+
+/* All registers are 8-bit width */
+#define UARTBDH 0x00
+#define UARTBDL 0x01
+#define UARTCR1 0x02
+#define UARTCR2 0x03
+#define UARTSR1 0x04
+#define UARTCR3 0x06
+#define UARTDR 0x07
+#define UARTCR4 0x0a
+#define UARTCR5 0x0b
+#define UARTMODEM 0x0d
+#define UARTPFIFO 0x10
+#define UARTCFIFO 0x11
+#define UARTSFIFO 0x12
+#define UARTTWFIFO 0x13
+#define UARTTCFIFO 0x14
+#define UARTRWFIFO 0x15
+#define UARTRCFIFO 0x16
+
+#define UARTBDH_LBKDIE 0x80
+#define UARTBDH_RXEDGIE 0x40
+#define UARTBDH_SBR_MASK 0x1f
+
+#define UARTCR1_LOOPS 0x80
+#define UARTCR1_RSRC 0x20
+#define UARTCR1_M 0x10
+#define UARTCR1_WAKE 0x08
+#define UARTCR1_ILT 0x04
+#define UARTCR1_PE 0x02
+#define UARTCR1_PT 0x01
+
+#define UARTCR2_TIE 0x80
+#define UARTCR2_TCIE 0x40
+#define UARTCR2_RIE 0x20
+#define UARTCR2_ILIE 0x10
+#define UARTCR2_TE 0x08
+#define UARTCR2_RE 0x04
+#define UARTCR2_RWU 0x02
+#define UARTCR2_SBK 0x01
+
+#define UARTSR1_TDRE 0x80
+#define UARTSR1_TC 0x40
+#define UARTSR1_RDRF 0x20
+#define UARTSR1_IDLE 0x10
+#define UARTSR1_OR 0x08
+#define UARTSR1_NF 0x04
+#define UARTSR1_FE 0x02
+#define UARTSR1_PE 0x01
+
+#define UARTCR3_R8 0x80
+#define UARTCR3_T8 0x40
+#define UARTCR3_TXDIR 0x20
+#define UARTCR3_TXINV 0x10
+#define UARTCR3_ORIE 0x08
+#define UARTCR3_NEIE 0x04
+#define UARTCR3_FEIE 0x02
+#define UARTCR3_PEIE 0x01
+
+#define UARTCR4_MAEN1 0x80
+#define UARTCR4_MAEN2 0x40
+#define UARTCR4_M10 0x20
+#define UARTCR4_BRFA_MASK 0x1f
+#define UARTCR4_BRFA_OFF 0
+
+#define UARTCR5_TDMAS 0x80
+#define UARTCR5_RDMAS 0x20
+
+#define UARTMODEM_RXRTSE 0x08
+#define UARTMODEM_TXRTSPOL 0x04
+#define UARTMODEM_TXRTSE 0x02
+#define UARTMODEM_TXCTSE 0x01
+
+#define UARTPFIFO_TXFE 0x80
+#define UARTPFIFO_FIFOSIZE_MASK 0x7
+#define UARTPFIFO_TXSIZE_OFF 4
+#define UARTPFIFO_RXFE 0x08
+#define UARTPFIFO_RXSIZE_OFF 0
+
+#define UARTCFIFO_TXFLUSH 0x80
+#define UARTCFIFO_RXFLUSH 0x40
+#define UARTCFIFO_RXOFE 0x04
+#define UARTCFIFO_TXOFE 0x02
+#define UARTCFIFO_RXUFE 0x01
+
+#define UARTSFIFO_TXEMPT 0x80
+#define UARTSFIFO_RXEMPT 0x40
+#define UARTSFIFO_RXOF 0x04
+#define UARTSFIFO_TXOF 0x02
+#define UARTSFIFO_RXUF 0x01
+
+/* 32-bit register defination */
+#define UARTBAUD 0x00
+#define UARTSTAT 0x04
+#define UARTCTRL 0x08
+#define UARTDATA 0x0C
+#define UARTMATCH 0x10
+#define UARTMODIR 0x14
+#define UARTFIFO 0x18
+#define UARTWATER 0x1c
+
+#define UARTBAUD_MAEN1 0x80000000
+#define UARTBAUD_MAEN2 0x40000000
+#define UARTBAUD_M10 0x20000000
+#define UARTBAUD_TDMAE 0x00800000
+#define UARTBAUD_RDMAE 0x00200000
+#define UARTBAUD_MATCFG 0x00400000
+#define UARTBAUD_BOTHEDGE 0x00020000
+#define UARTBAUD_RESYNCDIS 0x00010000
+#define UARTBAUD_LBKDIE 0x00008000
+#define UARTBAUD_RXEDGIE 0x00004000
+#define UARTBAUD_SBNS 0x00002000
+#define UARTBAUD_SBR 0x00000000
+#define UARTBAUD_SBR_MASK 0x1fff
+
+#define UARTSTAT_LBKDIF 0x80000000
+#define UARTSTAT_RXEDGIF 0x40000000
+#define UARTSTAT_MSBF 0x20000000
+#define UARTSTAT_RXINV 0x10000000
+#define UARTSTAT_RWUID 0x08000000
+#define UARTSTAT_BRK13 0x04000000
+#define UARTSTAT_LBKDE 0x02000000
+#define UARTSTAT_RAF 0x01000000
+#define UARTSTAT_TDRE 0x00800000
+#define UARTSTAT_TC 0x00400000
+#define UARTSTAT_RDRF 0x00200000
+#define UARTSTAT_IDLE 0x00100000
+#define UARTSTAT_OR 0x00080000
+#define UARTSTAT_NF 0x00040000
+#define UARTSTAT_FE 0x00020000
+#define UARTSTAT_PE 0x00010000
+#define UARTSTAT_MA1F 0x00008000
+#define UARTSTAT_M21F 0x00004000
+
+#define UARTCTRL_R8T9 0x80000000
+#define UARTCTRL_R9T8 0x40000000
+#define UARTCTRL_TXDIR 0x20000000
+#define UARTCTRL_TXINV 0x10000000
+#define UARTCTRL_ORIE 0x08000000
+#define UARTCTRL_NEIE 0x04000000
+#define UARTCTRL_FEIE 0x02000000
+#define UARTCTRL_PEIE 0x01000000
+#define UARTCTRL_TIE 0x00800000
+#define UARTCTRL_TCIE 0x00400000
+#define UARTCTRL_RIE 0x00200000
+#define UARTCTRL_ILIE 0x00100000
+#define UARTCTRL_TE 0x00080000
+#define UARTCTRL_RE 0x00040000
+#define UARTCTRL_RWU 0x00020000
+#define UARTCTRL_SBK 0x00010000
+#define UARTCTRL_MA1IE 0x00008000
+#define UARTCTRL_MA2IE 0x00004000
+#define UARTCTRL_IDLECFG 0x00000100
+#define UARTCTRL_LOOPS 0x00000080
+#define UARTCTRL_DOZEEN 0x00000040
+#define UARTCTRL_RSRC 0x00000020
+#define UARTCTRL_M 0x00000010
+#define UARTCTRL_WAKE 0x00000008
+#define UARTCTRL_ILT 0x00000004
+#define UARTCTRL_PE 0x00000002
+#define UARTCTRL_PT 0x00000001
+
+#define UARTDATA_NOISY 0x00008000
+#define UARTDATA_PARITYE 0x00004000
+#define UARTDATA_FRETSC 0x00002000
+#define UARTDATA_RXEMPT 0x00001000
+#define UARTDATA_IDLINE 0x00000800
+#define UARTDATA_MASK 0x3ff
+
+#define UARTMODIR_IREN 0x00020000
+#define UARTMODIR_TXCTSSRC 0x00000020
+#define UARTMODIR_TXCTSC 0x00000010
+#define UARTMODIR_RXRTSE 0x00000008
+#define UARTMODIR_TXRTSPOL 0x00000004
+#define UARTMODIR_TXRTSE 0x00000002
+#define UARTMODIR_TXCTSE 0x00000001
+
+#define UARTFIFO_TXEMPT 0x00800000
+#define UARTFIFO_RXEMPT 0x00400000
+#define UARTFIFO_TXOF 0x00020000
+#define UARTFIFO_RXUF 0x00010000
+#define UARTFIFO_TXFLUSH 0x00008000
+#define UARTFIFO_RXFLUSH 0x00004000
+#define UARTFIFO_TXOFE 0x00000200
+#define UARTFIFO_RXUFE 0x00000100
+#define UARTFIFO_TXFE 0x00000080
+#define UARTFIFO_FIFOSIZE_MASK 0x7
+#define UARTFIFO_TXSIZE_OFF 4
+#define UARTFIFO_RXFE 0x00000008
+#define UARTFIFO_RXSIZE_OFF 0
+
+#define UARTWATER_COUNT_MASK 0xff
+#define UARTWATER_TXCNT_OFF 8
+#define UARTWATER_RXCNT_OFF 24
+#define UARTWATER_WATER_MASK 0xff
+#define UARTWATER_TXWATER_OFF 0
+#define UARTWATER_RXWATER_OFF 16
+
+#define FSL_UART_RX_DMA_BUFFER_SIZE 64
+
+static inline void lpuart_setbrg(void __iomem *base,
+ unsigned int refclock,
+ unsigned int baudrate)
+{
+ unsigned int bfra;
+ u16 sbr;
+
+ sbr = (u16) (refclock / (16 * baudrate));
+
+ writeb(sbr >> 8, base + UARTBDH);
+ writeb(sbr & 0xff, base + UARTBDL);
+
+ bfra = DIV_ROUND_UP(2 * refclock, baudrate) - 32 * sbr;
+ bfra &= UARTCR4_BRFA_MASK;
+ writeb(bfra, base + UARTCR4);
+}
+
+static inline void lpuart_setup_with_fifo(void __iomem *base,
+ unsigned int refclock,
+ unsigned int twfifo)
+{
+ /* Disable UART */
+ writeb(0, base + UARTCR2);
+ writeb(0, base + UARTMODEM);
+ writeb(0, base + UARTCR1);
+
+ if (twfifo) {
+ writeb(UARTPFIFO_TXFE | UARTPFIFO_RXFE, base + UARTPFIFO);
+ writeb((u8)twfifo, base + UARTTWFIFO);
+ } else {
+ writeb(0, base + UARTPFIFO);
+ writeb(0, base + UARTTWFIFO);
+ }
+ writeb(1, base + UARTRWFIFO);
+ writeb(UARTCFIFO_RXFLUSH | UARTCFIFO_TXFLUSH, base + UARTCFIFO);
+
+ lpuart_setbrg(base, refclock, CONFIG_BAUDRATE);
+
+ writeb(UARTCR2_TE | UARTCR2_RE, base + UARTCR2);
+}
+
+static inline void lpuart_setup(void __iomem *base,
+ unsigned int refclock)
+{
+ lpuart_setup_with_fifo(base, refclock, 0x00);
+}
+
+static inline void lpuart_putc(void __iomem *base, int c)
+{
+ if (!(readb(base + UARTCR2) & UARTCR2_TE))
+ return;
+
+ while (!(readb(base + UARTSR1) & UARTSR1_TDRE));
+
+ writeb(c, base + UARTDR);
+}
+
+#endif
--
2.5.5
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