From 4bb6f26b05450777d14aa96e10783066c2503dc2 Mon Sep 17 00:00:00 2001
From: John Klug <john.klug@multitech.com>
Date: Wed, 11 Nov 2020 16:17:52 -0600
Subject: Add new BSP submodule for Atmel Processors.

---
 .../vizzini/vizzini-1.1/vizzini-1.1-rs485.patch    | 102 +++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 recipes-kernel/vizzini/vizzini-1.1/vizzini-1.1-rs485.patch

(limited to 'recipes-kernel/vizzini/vizzini-1.1/vizzini-1.1-rs485.patch')

diff --git a/recipes-kernel/vizzini/vizzini-1.1/vizzini-1.1-rs485.patch b/recipes-kernel/vizzini/vizzini-1.1/vizzini-1.1-rs485.patch
new file mode 100644
index 0000000..6833e5b
--- /dev/null
+++ b/recipes-kernel/vizzini/vizzini-1.1/vizzini-1.1-rs485.patch
@@ -0,0 +1,102 @@
+Index: xr21v141x-lnx3.10-3.11/vizzini.c
+===================================================================
+--- xr21v141x-lnx3.10-3.11.orig/vizzini.c	2014-05-02 12:20:07.972225646 -0500
++++ xr21v141x-lnx3.10-3.11/vizzini.c	2014-05-07 13:53:08.125405483 -0500
+@@ -892,6 +892,35 @@
+         dev_dbg(&xr21v141x->control->dev, "vz_test_mode: selector=0x%02x\n", selector);
+         return retval < 0 ? retval : 0;
+ }
++static int xr21v141x_set_rs485(struct xr21v141x *xr21v141x, struct serial_rs485 *rs485conf) {
++	int block = xr21v141x->block;
++	int result = 0;
++	unsigned int gpio_mode, flow = 0;
++
++	xr21v141x->rs485 = *rs485conf;
++
++	if (xr21v141x->rs485.flags & SER_RS485_ENABLED) {
++		dev_info(&xr21v141x->control->dev, "Enabling RS485");
++
++		/* enable auto tranceiver enable on transmit, TX active high */
++		gpio_mode = UART_GPIO_MODE_SEL_XCVR_EN_ACT | UART_GPIO_MODE_XCVR_EN_POL;
++		result = vizzini_set_reg(xr21v141x, block, UART_GPIO_MODE, gpio_mode);
++		if (result < 0)
++			dev_err(&xr21v141x->control->dev, "Error setting auto trans enable");
++
++		/* half duplex rs485 */
++		flow = UART_FLOW_HALF_DUPLEX;
++		result = vizzini_set_reg(xr21v141x, block, UART_FLOW, flow);
++		if (result < 0)
++			dev_err(&xr21v141x->control->dev, "Error setting half duplex");
++	} else {
++		dev_info(&xr21v141x->control->dev, "Disabling RS485 - flow control off");
++		vizzini_set_reg(xr21v141x, block, UART_GPIO_MODE, UART_GPIO_MODE_SEL_GPIO);
++		vizzini_set_reg(xr21v141x, block, UART_FLOW, UART_FLOW_MODE_NONE);
++	}
++
++	return 0;
++}
+ 
+ static int xr21v141x_tty_ioctl(struct tty_struct *tty,
+ 					unsigned int cmd, unsigned long arg)
+@@ -902,6 +931,8 @@
+ 	unsigned int  block, reg, val, match, preciseflags, unicast, broadcast, flow, selector;
+         char	*data;
+ 
++	struct serial_rs485 rs485conf;
++
+ 	switch (cmd) {
+ 	case TIOCGSERIAL: /* gets serial port data */
+ 		rv = get_serial_info(xr21v141x, (struct serial_struct __user *) arg);
+@@ -910,6 +941,39 @@
+ 		rv = set_serial_info(xr21v141x, (struct serial_struct __user *) arg);
+ 		break;
+ 
++	case TIOCGRS485:
++		if (! arg) {
++			dev_err(&xr21v141x->control->dev, "%s - TIOCGRS485 arg invalid\n", __func__);
++			rv = -EFAULT;
++			break;
++		}
++
++		if (copy_to_user((struct serial_rs485 *) arg, &(xr21v141x->rs485), sizeof(struct serial_rs485))) {
++			dev_err(&xr21v141x->control->dev, "%s - TIOCGRS485 copy_to_user fail\n", __func__);
++			rv = -EFAULT;
++			break;
++		}
++		rv = 0;
++		break;
++
++	case TIOCSRS485:
++		if (! arg) {
++			dev_err(&xr21v141x->control->dev, "%s - TIOCSRS485 arg invalid\n", __func__);
++			rv = -EFAULT;
++			break;
++		}
++
++		if (copy_from_user(&rs485conf, (struct serial_rs485 *) arg, sizeof(rs485conf))) {
++			dev_err(&xr21v141x->control->dev, "%s - TIOCSRS485 copy_from_user failed\n", __func__);
++			rv = -EFAULT;
++			break;
++		}
++
++		vizzini_disable(xr21v141x);
++		rv = xr21v141x_set_rs485(xr21v141x, &rs485conf);
++		vizzini_enable(xr21v141x);
++		break;
++
+         case VZIOC_GET_REG:
+                 if (get_user(block, (int __user *)arg))
+                         return -EFAULT;
+Index: xr21v141x-lnx3.10-3.11/vizzini.h
+===================================================================
+--- xr21v141x-lnx3.10-3.11.orig/vizzini.h	2014-04-04 19:59:33.000000000 -0500
++++ xr21v141x-lnx3.10-3.11/vizzini.h	2014-05-02 12:20:08.028225647 -0500
+@@ -282,7 +282,7 @@
+ #ifdef VIZZINI_IWA
+         int           iwa;
+ #endif
+-
++	struct serial_rs485 rs485;
+ };
+ 
+ #define CDC_DATA_INTERFACE_TYPE	0x0a
-- 
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