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-rw-r--r--recipes/linux/linux-2.6.27/ts72xx/0022-TS-72xx-RS485-auto-mode-support.patch218
1 files changed, 218 insertions, 0 deletions
diff --git a/recipes/linux/linux-2.6.27/ts72xx/0022-TS-72xx-RS485-auto-mode-support.patch b/recipes/linux/linux-2.6.27/ts72xx/0022-TS-72xx-RS485-auto-mode-support.patch
new file mode 100644
index 0000000000..988a20f0de
--- /dev/null
+++ b/recipes/linux/linux-2.6.27/ts72xx/0022-TS-72xx-RS485-auto-mode-support.patch
@@ -0,0 +1,218 @@
+From 41163459c76f0540aee9d60e13059ba31f684e15 Mon Sep 17 00:00:00 2001
+From: =?utf-8?q?Petr=20=C5=A0tetiar?= <ynezz@true.cz>
+Date: Sun, 4 Jan 2009 16:07:51 +0100
+Subject: [PATCH] TS-72xx RS485 auto mode support
+MIME-Version: 1.0
+Content-Type: text/plain; charset=utf-8
+Content-Transfer-Encoding: 8bit
+
+Signed-off-by: Petr Štetiar <ynezz@true.cz>
+---
+ arch/arm/include/asm/ioctls.h | 3 +
+ arch/arm/mach-ep93xx/include/mach/ts72xx.h | 8 ++
+ drivers/serial/amba-pl010.c | 121 ++++++++++++++++++++++++++++
+ 3 files changed, 132 insertions(+), 0 deletions(-)
+
+diff --git a/arch/arm/include/asm/ioctls.h b/arch/arm/include/asm/ioctls.h
+index a91d8a1..a4b60ae 100644
+--- a/arch/arm/include/asm/ioctls.h
++++ b/arch/arm/include/asm/ioctls.h
+@@ -70,6 +70,9 @@
+ #define TIOCGICOUNT 0x545D /* read serial port inline interrupt counts */
+ #define FIOQSIZE 0x545E
+
++#define TIOC_SBCC485 0x545F /* TS72xx RTS/485 mode clear */
++#define TIOC_SBCS485 0x5460 /* TS72xx RTS/485 mode set */
++
+ /* Used for packet mode */
+ #define TIOCPKT_DATA 0
+ #define TIOCPKT_FLUSHREAD 1
+diff --git a/arch/arm/mach-ep93xx/include/mach/ts72xx.h b/arch/arm/mach-ep93xx/include/mach/ts72xx.h
+index 601d0a3..1262e2b 100644
+--- a/arch/arm/mach-ep93xx/include/mach/ts72xx.h
++++ b/arch/arm/mach-ep93xx/include/mach/ts72xx.h
+@@ -70,6 +70,14 @@
+ #define TS72XX_NAND_BUSY_VIRT_BASE 0xfebfa000
+ #define TS72XX_NAND_BUSY_SIZE 0x00001000
+
++#define TS72XX_RS485_AUTO485FD 1
++#define TS72XX_RS485_AUTO485HD 2
++#define TS72XX_RS485_MODE_RS232 0x00
++#define TS72XX_RS485_MODE_FD 0x01
++#define TS72XX_RS485_MODE_9600_HD 0x04
++#define TS72XX_RS485_MODE_19200_HD 0x05
++#define TS72XX_RS485_MODE_57600_HD 0x06
++#define TS72XX_RS485_MODE_115200_HD 0x07
+
+ #define TS72XX_RTC_INDEX_VIRT_BASE 0xfebf9000
+ #define TS72XX_RTC_INDEX_PHYS_BASE 0x10800000
+diff --git a/drivers/serial/amba-pl010.c b/drivers/serial/amba-pl010.c
+index 90b56c2..d609666 100644
+--- a/drivers/serial/amba-pl010.c
++++ b/drivers/serial/amba-pl010.c
+@@ -49,6 +49,7 @@
+ #include <linux/clk.h>
+
+ #include <asm/io.h>
++#include <mach/ts72xx.h>
+
+ #define UART_NR 8
+
+@@ -64,6 +65,11 @@
+ #define UART_DUMMY_RSR_RX 256
+ #define UART_PORT_SIZE 64
+
++#ifdef CONFIG_MACH_TS72XX
++static void __iomem *ts_rs485_data9_register;
++static void __iomem *ts_rs485_control_register;
++#endif
++
+ /*
+ * We wrap our port structure around the generic uart_port.
+ */
+@@ -519,6 +525,107 @@ static int pl010_verify_port(struct uart_port *port, struct serial_struct *ser)
+ return ret;
+ }
+
++#ifdef CONFIG_MACH_TS72XX
++static int ts72xx_rs485_init(void)
++{
++ ts_rs485_data9_register = ioremap(TS72XX_RS485_MODE_PHYS_BASE, 4096);
++ if (ts_rs485_data9_register == NULL) {
++ return -1;
++ }
++
++ ts_rs485_control_register = ioremap(TS72XX_RS485_CONTROL_PHYS_BASE, 4096);
++ if (ts_rs485_control_register == NULL) {
++ iounmap(ts_rs485_data9_register);
++ return -1;
++ }
++
++ return 0;
++}
++
++static int ts72xx_auto485(struct uart_port *port, unsigned int cmd, unsigned long *arg)
++{
++ int baud, cflag, mode;
++ int datalength;
++
++ mode = (int)*arg;
++ if (!is_rs485_installed()) {
++ printk("amba-pl010.c: this board does not support RS485 auto mode\n");
++ return -EINVAL;
++ }
++
++ if (port->line != 1) {
++ printk("amba-pl010.c: auto RS485 mode is only supported on second port (/dev/ttyAM1)\n");
++ return -EINVAL;
++ }
++
++ datalength = 8;
++ cflag = port->info->port.tty->termios->c_cflag ;
++ if (cflag & PARENB)
++ datalength++;
++
++ if (cflag & CSTOPB)
++ datalength++;
++
++ baud = tty_get_baud_rate(port->info->port.tty);
++
++ switch (cmd) {
++ case TIOC_SBCC485:
++ if ((mode & TS72XX_RS485_AUTO485FD) || (mode & TS72XX_RS485_AUTO485HD)) {
++ printk("amba-pl010.c: unsetting auto RS485 mode\n");
++ __raw_writew(TS72XX_RS485_MODE_RS232, ts_rs485_control_register);
++ __raw_writew(TS72XX_RS485_MODE_RS232, ts_rs485_data9_register);
++ }
++ break;
++ case TIOC_SBCS485:
++ if (mode & TS72XX_RS485_AUTO485FD) {
++ printk ("amba-pl010.c: setting FULL duplex auto RS485 mode\n");
++ __raw_writew(TS72XX_RS485_MODE_FD, ts_rs485_control_register);
++ if (datalength > 8)
++ __raw_writew(TS72XX_RS485_MODE_FD, ts_rs485_data9_register);
++ } else if (mode & TS72XX_RS485_AUTO485HD) {
++ printk("amba-pl010.c: setting HALF DUPLEX auto RS485 mode\n");
++ switch (baud) {
++ case 9600:
++ __raw_writew(TS72XX_RS485_MODE_9600_HD, ts_rs485_control_register);
++ break;
++ case 19200:
++ __raw_writew(TS72XX_RS485_MODE_19200_HD, ts_rs485_control_register);
++ break;
++ case 57600:
++ __raw_writew(TS72XX_RS485_MODE_57600_HD, ts_rs485_control_register);
++ break;
++ case 115200:
++ __raw_writew(TS72XX_RS485_MODE_115200_HD, ts_rs485_control_register);
++ break;
++ default:
++ printk("amba-pl010.c: %d baud rate is not supported for auto RS485 mode\n", baud);
++ return -1;
++ }
++ if (datalength > 8)
++ __raw_writew(TS72XX_RS485_MODE_FD, ts_rs485_data9_register);
++ }
++ break;
++ }
++
++ return 0;
++}
++#endif
++
++int pl010_ioctl(struct uart_port *port, unsigned int cmd, unsigned long arg)
++{
++#ifdef CONFIG_MACH_TS72XX
++ switch (cmd) {
++ case TIOC_SBCC485:
++ case TIOC_SBCS485:
++ return ts72xx_auto485(port, cmd, (unsigned long *)arg);
++ break;
++ default:
++ return -ENOIOCTLCMD;
++ }
++#endif
++ return -ENOIOCTLCMD;
++}
++
+ static struct uart_ops amba_pl010_pops = {
+ .tx_empty = pl010_tx_empty,
+ .set_mctrl = pl010_set_mctrl,
+@@ -536,6 +643,7 @@ static struct uart_ops amba_pl010_pops = {
+ .request_port = pl010_request_port,
+ .config_port = pl010_config_port,
+ .verify_port = pl010_verify_port,
++ .ioctl = pl010_ioctl,
+ };
+
+ static struct uart_amba_port *amba_ports[UART_NR];
+@@ -794,6 +902,15 @@ static int __init pl010_init(void)
+ ret = uart_register_driver(&amba_reg);
+ if (ret == 0) {
+ ret = amba_driver_register(&pl010_driver);
++#ifdef CONFIG_MACH_TS72XX
++ if (!ret && is_rs485_installed()) {
++ ret = ts72xx_rs485_init();
++ if (ret)
++ printk("amba-pl010.c: ts72xx_rs485_init() failed\n");
++ else
++ printk("amba-pl010.c: auto RS485 mode initialized\n");
++ }
++#endif
+ if (ret)
+ uart_unregister_driver(&amba_reg);
+ }
+@@ -804,6 +921,10 @@ static void __exit pl010_exit(void)
+ {
+ amba_driver_unregister(&pl010_driver);
+ uart_unregister_driver(&amba_reg);
++#ifdef CONFIG_MACH_TS72XX
++ iounmap(ts_rs485_data9_register);
++ iounmap(ts_rs485_control_register);
++#endif
+ }
+
+ module_init(pl010_init);
+--
+1.6.0.4
+
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-06-08 13:20:06 +0000