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Diffstat (limited to 'recipes/linux/linux-2.6.32/ts72xx/0007-ts72xx_rs485.patch')
-rw-r--r--recipes/linux/linux-2.6.32/ts72xx/0007-ts72xx_rs485.patch236
1 files changed, 236 insertions, 0 deletions
diff --git a/recipes/linux/linux-2.6.32/ts72xx/0007-ts72xx_rs485.patch b/recipes/linux/linux-2.6.32/ts72xx/0007-ts72xx_rs485.patch
new file mode 100644
index 0000000000..437a99abf8
--- /dev/null
+++ b/recipes/linux/linux-2.6.32/ts72xx/0007-ts72xx_rs485.patch
@@ -0,0 +1,236 @@
+From 406bb1336e9e5401adc61a0227f9bfc5f5a1ef5a Mon Sep 17 00:00:00 2001
+From: Matthieu Crapet <mcrapet@gmail.com>
+Date: Sun, 17 Jan 2010 17:54:33 +0100
+Subject: [PATCH] ts72xx_rs485
+MIME-Version: 1.0
+Content-Type: text/plain; charset=utf-8
+Content-Transfer-Encoding: 8bit
+
+Crude hack...
+
+Signed-off-by: Petr Štetiar <ynezz@true.cz>
+---
+ arch/arm/include/asm/ioctls.h | 3 +
+ drivers/serial/Kconfig | 8 +++
+ drivers/serial/amba-pl010.c | 137 +++++++++++++++++++++++++++++++++++++++--
+ 3 files changed, 142 insertions(+), 6 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/drivers/serial/Kconfig b/drivers/serial/Kconfig
+index 0eeca06..ff24f69 100644
+--- a/drivers/serial/Kconfig
++++ b/drivers/serial/Kconfig
+@@ -321,6 +321,14 @@ config SERIAL_AMBA_PL010_CONSOLE
+ your boot loader (lilo or loadlin) about how to pass options to the
+ kernel at boot time.)
+
++config SERIAL_AMBA_PL010_TS72XX
++ bool "Support for RS-485 on AMBA serial port (for TS-72XX SBC)"
++ depends on SERIAL_AMBA_PL010 != n && MACH_TS72XX
++ help
++ This add support for RS-485 on some Technologic System SBC.
++
++ If unsure, say N.
++
+ config SERIAL_AMBA_PL011
+ tristate "ARM AMBA PL011 serial port support"
+ depends on ARM_AMBA
+diff --git a/drivers/serial/amba-pl010.c b/drivers/serial/amba-pl010.c
+index 429a8ae..aff4d9c 100644
+--- a/drivers/serial/amba-pl010.c
++++ b/drivers/serial/amba-pl010.c
+@@ -50,6 +50,10 @@
+
+ #include <asm/io.h>
+
++#if defined(CONFIG_SERIAL_AMBA_PL010_TS72XX)
++#include <mach/ts72xx.h>
++#endif
++
+ #define UART_NR 8
+
+ #define SERIAL_AMBA_MAJOR 204
+@@ -64,6 +68,12 @@
+ #define UART_DUMMY_RSR_RX 256
+ #define UART_PORT_SIZE 64
+
++#if defined(CONFIG_SERIAL_AMBA_PL010_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.
+ */
+@@ -385,7 +395,7 @@ pl010_set_termios(struct uart_port *port, struct ktermios *termios,
+ /*
+ * Ask the core to calculate the divisor for us.
+ */
+- baud = uart_get_baud_rate(port, termios, old, 0, uap->port.uartclk/16);
++ baud = uart_get_baud_rate(port, termios, old, 0, uap->port.uartclk/16);
+ quot = uart_get_divisor(port, baud);
+
+ switch (termios->c_cflag & CSIZE) {
+@@ -519,6 +529,107 @@ static int pl010_verify_port(struct uart_port *port, struct serial_struct *ser)
+ return ret;
+ }
+
++
++#if defined(CONFIG_SERIAL_AMBA_PL010_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->state->port.tty->termios->c_cflag;
++ if (cflag & PARENB)
++ datalength++;
++
++ if (cflag & CSTOPB)
++ datalength++;
++
++ baud = tty_get_baud_rate(port->state->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;
++}
++
++static int pl010_ioctl(struct uart_port *port, unsigned int cmd, unsigned long arg)
++{
++ switch (cmd) {
++ case TIOC_SBCC485:
++ case TIOC_SBCS485:
++ return ts72xx_auto485(port, cmd, (unsigned long *)arg);
++ default:
++ return -ENOIOCTLCMD;
++ }
++
++ return -ENOIOCTLCMD;
++}
++#endif /* CONFIG_SERIAL_AMBA_PL010_TS72XX */
++
++
+ static struct uart_ops amba_pl010_pops = {
+ .tx_empty = pl010_tx_empty,
+ .set_mctrl = pl010_set_mctrl,
+@@ -536,6 +647,9 @@ static struct uart_ops amba_pl010_pops = {
+ .request_port = pl010_request_port,
+ .config_port = pl010_config_port,
+ .verify_port = pl010_verify_port,
++#if defined(CONFIG_SERIAL_AMBA_PL010_TS72XX)
++ .ioctl = pl010_ioctl,
++#endif
+ };
+
+ static struct uart_amba_port *amba_ports[UART_NR];
+@@ -792,11 +906,22 @@ static int __init pl010_init(void)
+ printk(KERN_INFO "Serial: AMBA driver\n");
+
+ ret = uart_register_driver(&amba_reg);
+- if (ret == 0) {
+- ret = amba_driver_register(&pl010_driver);
+- if (ret)
+- uart_unregister_driver(&amba_reg);
+- }
++ if (ret == 0) {
++ ret = amba_driver_register(&pl010_driver);
++
++ #if defined(CONFIG_SERIAL_AMBA_PL010_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);
++ }
+ return ret;
+ }
+
+--
+1.6.0.4
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-14 08:17:45 +0000