From 04dd17822334871b23ea2862f7798fb0e0007777 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 08:53:19 +0000
Subject: [PATCH] change otg to host mode
---
kernel/drivers/tty/serial/8250/8250.h | 148 ++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 144 insertions(+), 4 deletions(-)
diff --git a/kernel/drivers/tty/serial/8250/8250.h b/kernel/drivers/tty/serial/8250/8250.h
index 7c19add..97df058 100644
--- a/kernel/drivers/tty/serial/8250/8250.h
+++ b/kernel/drivers/tty/serial/8250/8250.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Driver for 8250/16550-type serial ports
*
@@ -10,6 +10,8 @@
#include <linux/serial_8250.h>
#include <linux/serial_reg.h>
#include <linux/dmaengine.h>
+
+#include "../serial_mctrl_gpio.h"
struct uart_8250_dma {
int (*tx_dma)(struct uart_8250_port *p);
@@ -46,7 +48,7 @@
unsigned char tx_running;
unsigned char tx_err;
unsigned char rx_running;
-#ifdef CONFIG_ARCH_ROCKCHIP
+#if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI)
size_t rx_index;
#endif
};
@@ -89,6 +91,7 @@
#define UART_BUG_NOMSR (1 << 2) /* UART has buggy MSR status bits (Au1x00) */
#define UART_BUG_THRE (1 << 3) /* UART has buggy THRE reassertion */
#define UART_BUG_PARITY (1 << 4) /* UART mishandles parity if FIFO enabled */
+#define UART_BUG_TXRACE (1 << 5) /* UART Tx fails to set remote DR */
#ifdef CONFIG_SERIAL_8250_SHARE_IRQ
@@ -119,6 +122,28 @@
up->port.serial_out(&up->port, offset, value);
}
+/*
+ * For the 16C950
+ */
+static void serial_icr_write(struct uart_8250_port *up, int offset, int value)
+{
+ serial_out(up, UART_SCR, offset);
+ serial_out(up, UART_ICR, value);
+}
+
+static unsigned int __maybe_unused serial_icr_read(struct uart_8250_port *up,
+ int offset)
+{
+ unsigned int value;
+
+ serial_icr_write(up, UART_ACR, up->acr | UART_ACR_ICRRD);
+ serial_out(up, UART_SCR, offset);
+ value = serial_in(up, UART_ICR);
+ serial_icr_write(up, UART_ACR, up->acr);
+
+ return value;
+}
+
void serial8250_clear_and_reinit_fifos(struct uart_8250_port *p);
static inline int serial_dl_read(struct uart_8250_port *up)
@@ -131,6 +156,30 @@
up->dl_write(up, value);
}
+static inline bool serial8250_set_THRI(struct uart_8250_port *up)
+{
+ if (up->ier & UART_IER_THRI)
+ return false;
+ up->ier |= UART_IER_THRI;
+#if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI)
+ up->ier |= UART_IER_PTIME;
+#endif
+ serial_out(up, UART_IER, up->ier);
+ return true;
+}
+
+static inline bool serial8250_clear_THRI(struct uart_8250_port *up)
+{
+ if (!(up->ier & UART_IER_THRI))
+ return false;
+ up->ier &= ~UART_IER_THRI;
+#if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI)
+ up->ier &= ~UART_IER_PTIME;
+#endif
+ serial_out(up, UART_IER, up->ier);
+ return true;
+}
+
struct uart_8250_port *serial8250_get_port(int line);
void serial8250_rpm_get(struct uart_8250_port *p);
@@ -139,17 +188,87 @@
void serial8250_rpm_get_tx(struct uart_8250_port *p);
void serial8250_rpm_put_tx(struct uart_8250_port *p);
-int serial8250_em485_init(struct uart_8250_port *p);
+int serial8250_em485_config(struct uart_port *port, struct serial_rs485 *rs485);
+void serial8250_em485_start_tx(struct uart_8250_port *p);
+void serial8250_em485_stop_tx(struct uart_8250_port *p);
void serial8250_em485_destroy(struct uart_8250_port *p);
+
+/* MCR <-> TIOCM conversion */
+static inline int serial8250_TIOCM_to_MCR(int tiocm)
+{
+ int mcr = 0;
+
+ if (tiocm & TIOCM_RTS)
+ mcr |= UART_MCR_RTS;
+ if (tiocm & TIOCM_DTR)
+ mcr |= UART_MCR_DTR;
+ if (tiocm & TIOCM_OUT1)
+ mcr |= UART_MCR_OUT1;
+ if (tiocm & TIOCM_OUT2)
+ mcr |= UART_MCR_OUT2;
+ if (tiocm & TIOCM_LOOP)
+ mcr |= UART_MCR_LOOP;
+
+ return mcr;
+}
+
+static inline int serial8250_MCR_to_TIOCM(int mcr)
+{
+ int tiocm = 0;
+
+ if (mcr & UART_MCR_RTS)
+ tiocm |= TIOCM_RTS;
+ if (mcr & UART_MCR_DTR)
+ tiocm |= TIOCM_DTR;
+ if (mcr & UART_MCR_OUT1)
+ tiocm |= TIOCM_OUT1;
+ if (mcr & UART_MCR_OUT2)
+ tiocm |= TIOCM_OUT2;
+ if (mcr & UART_MCR_LOOP)
+ tiocm |= TIOCM_LOOP;
+
+ return tiocm;
+}
+
+/* MSR <-> TIOCM conversion */
+static inline int serial8250_MSR_to_TIOCM(int msr)
+{
+ int tiocm = 0;
+
+ if (msr & UART_MSR_DCD)
+ tiocm |= TIOCM_CAR;
+ if (msr & UART_MSR_RI)
+ tiocm |= TIOCM_RNG;
+ if (msr & UART_MSR_DSR)
+ tiocm |= TIOCM_DSR;
+ if (msr & UART_MSR_CTS)
+ tiocm |= TIOCM_CTS;
+
+ return tiocm;
+}
static inline void serial8250_out_MCR(struct uart_8250_port *up, int value)
{
serial_out(up, UART_MCR, value);
+
+ if (up->gpios)
+ mctrl_gpio_set(up->gpios, serial8250_MCR_to_TIOCM(value));
}
static inline int serial8250_in_MCR(struct uart_8250_port *up)
{
- return serial_in(up, UART_MCR);
+ int mctrl;
+
+ mctrl = serial_in(up, UART_MCR);
+
+ if (up->gpios) {
+ unsigned int mctrl_gpio = 0;
+
+ mctrl_gpio = mctrl_gpio_get_outputs(up->gpios, &mctrl_gpio);
+ mctrl |= serial8250_TIOCM_to_MCR(mctrl_gpio);
+ }
+
+ return mctrl;
}
#if defined(__alpha__) && !defined(CONFIG_PCI)
@@ -217,9 +336,19 @@
#ifdef CONFIG_SERIAL_8250_DMA
extern int serial8250_tx_dma(struct uart_8250_port *);
extern int serial8250_rx_dma(struct uart_8250_port *);
+#if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI)
+extern int serial8250_start_rx_dma(struct uart_8250_port *);
+#endif
extern void serial8250_rx_dma_flush(struct uart_8250_port *);
extern int serial8250_request_dma(struct uart_8250_port *);
extern void serial8250_release_dma(struct uart_8250_port *);
+
+static inline bool serial8250_tx_dma_running(struct uart_8250_port *p)
+{
+ struct uart_8250_dma *dma = p->dma;
+
+ return dma && dma->tx_running;
+}
#else
static inline int serial8250_tx_dma(struct uart_8250_port *p)
{
@@ -229,12 +358,23 @@
{
return -1;
}
+#if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI)
+static inline int serial8250_start_rx_dma(struct uart_8250_port *p)
+{
+ return -1;
+}
+#endif
static inline void serial8250_rx_dma_flush(struct uart_8250_port *p) { }
static inline int serial8250_request_dma(struct uart_8250_port *p)
{
return -1;
}
static inline void serial8250_release_dma(struct uart_8250_port *p) { }
+
+static inline bool serial8250_tx_dma_running(struct uart_8250_port *p)
+{
+ return false;
+}
#endif
static inline int ns16550a_goto_highspeed(struct uart_8250_port *up)
--
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