--- /dev/null
+RS485 auto mode support ported from 2.4 (diff against 2.6.19-rc6-git10)
+
+Signed-off-by: Petr Stetiar <ynezz@true.cz>
+
+diff --git a/drivers/serial/amba-pl010.c b/drivers/serial/amba-pl010.c
+index 4213fab..5b3c5ff 100644
+--- a/drivers/serial/amba-pl010.c
++++ b/drivers/serial/amba-pl010.c
+@@ -50,6 +50,7 @@
+ #include <linux/amba/serial.h>
+
+ #include <asm/io.h>
++#include <asm/hardware.h>
+
+ #define UART_NR 8
+
+@@ -65,6 +66,11 @@
+ #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.
+ */
+@@ -487,6 +493,107 @@ static int pl010_verify_port(struct uart
+ return ret;
+ }
+
++#ifdef CONFIG_MACH_TS72XX
++static int ts72xx_rs485_init(void)
++{
++ ts_rs485_data9_register = ioremap(TS72XX_RS485_DATA9_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->tty->termios->c_cflag ;
++ if (cflag & PARENB)
++ datalength++;
++
++ if (cflag & CSTOPB)
++ datalength++;
++
++ baud = tty_get_baud_rate(port->info->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,
+@@ -504,6 +611,7 @@ 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];
+@@ -746,6 +854,15 @@ 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);
+ }
+@@ -756,6 +873,10 @@ 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);
+diff --git a/include/asm-arm/arch-ep93xx/ts72xx.h b/include/asm-arm/arch-ep93xx/ts72xx.h
+index a94f63f..4c9396b 100644
+--- a/include/asm-arm/arch-ep93xx/ts72xx.h
++++ b/include/asm-arm/arch-ep93xx/ts72xx.h
+@@ -68,6 +68,16 @@
+ #define TS72XX_RTC_DATA_PHYS_BASE 0x11700000
+ #define TS72XX_RTC_DATA_SIZE 0x00001000
+
++#define TS72XX_RS485_CONTROL_PHYS_BASE 0x22C00000
++#define TS72XX_RS485_DATA9_PHYS_BASE 0x23000000
++#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
+
+ #ifndef __ASSEMBLY__
+ #include <asm/io.h>
+@@ -87,6 +100,12 @@ static inline int board_is_ts7260(void)
+ return __raw_readb(TS72XX_MODEL_VIRT_BASE) == TS72XX_MODEL_TS7260;
+ }
+
++static inline int is_rs485_installed(void)
++{
++ return !!(__raw_readb(TS72XX_OPTIONS_VIRT_BASE) &
++ TS72XX_OPTIONS_COM2_RS485);
++}
++
+ static inline int is_max197_installed(void)
+ {
+ return !!(__raw_readb(TS72XX_OPTIONS_VIRT_BASE) &
+diff --git a/include/asm-arm/ioctls.h b/include/asm-arm/ioctls.h
+index bb9a7aa..4d7dad1 100644
+--- a/include/asm-arm/ioctls.h
++++ b/include/asm-arm/ioctls.h
+@@ -66,6 +66,9 @@
+ #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
projects / vuplus_openembedded / commitdiff