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2024-05-10 61598093bbdd283a7edc367d900f223070ead8d2 
 kernel/drivers/i2c/busses/i2c-parport.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /* ------------------------------------------------------------------------ *
23  * i2c-parport.c I2C bus over parallel port                                 *
34  * ------------------------------------------------------------------------ *
....@@ -9,15 +10,6 @@
910    Frodo Looijaard <frodol@dds.nl>
1011    Kyösti Mälkki <kmalkki@cc.hut.fi>
1112 
12
-   This program is free software; you can redistribute it and/or modify
13
-   it under the terms of the GNU General Public License as published by
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-   the Free Software Foundation; either version 2 of the License, or
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-   (at your option) any later version.
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-
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-   This program is distributed in the hope that it will be useful,
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-   but WITHOUT ANY WARRANTY; without even the implied warranty of
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-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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-   GNU General Public License for more details.
2113  * ------------------------------------------------------------------------ */
2214 
2315 #define pr_fmt(fmt) "i2c-parport: " fmt
....@@ -33,7 +25,90 @@
3325 #include <linux/slab.h>
3426 #include <linux/list.h>
3527 #include <linux/mutex.h>
36
-#include "i2c-parport.h"
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+
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+#define PORT_DATA	0
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+#define PORT_STAT	1
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+#define PORT_CTRL	2
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+
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+struct lineop {
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+	u8 val;
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+	u8 port;
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+	u8 inverted;
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+};
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+
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+struct adapter_parm {
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+	struct lineop setsda;
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+	struct lineop setscl;
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+	struct lineop getsda;
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+	struct lineop getscl;
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+	struct lineop init;
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+	unsigned int smbus_alert:1;
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+};
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+
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+static const struct adapter_parm adapter_parm[] = {
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+	/* type 0: Philips adapter */
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+	{
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+		.setsda	= { 0x80, PORT_DATA, 1 },
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+		.setscl	= { 0x08, PORT_CTRL, 0 },
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+		.getsda	= { 0x80, PORT_STAT, 0 },
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+		.getscl	= { 0x08, PORT_STAT, 0 },
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+	},
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+	/* type 1: home brew teletext adapter */
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+	{
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+		.setsda	= { 0x02, PORT_DATA, 0 },
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+		.setscl	= { 0x01, PORT_DATA, 0 },
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+		.getsda	= { 0x80, PORT_STAT, 1 },
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+	},
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+	/* type 2: Velleman K8000 adapter */
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+	{
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+		.setsda	= { 0x02, PORT_CTRL, 1 },
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+		.setscl	= { 0x08, PORT_CTRL, 1 },
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+		.getsda	= { 0x10, PORT_STAT, 0 },
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+	},
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+	/* type 3: ELV adapter */
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+	{
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+		.setsda	= { 0x02, PORT_DATA, 1 },
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+		.setscl	= { 0x01, PORT_DATA, 1 },
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+		.getsda	= { 0x40, PORT_STAT, 1 },
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+		.getscl	= { 0x08, PORT_STAT, 1 },
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+	},
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+	/* type 4: ADM1032 evaluation board */
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+	{
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+		.setsda	= { 0x02, PORT_DATA, 1 },
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+		.setscl	= { 0x01, PORT_DATA, 1 },
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+		.getsda	= { 0x10, PORT_STAT, 1 },
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+		.init	= { 0xf0, PORT_DATA, 0 },
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+		.smbus_alert = 1,
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+	},
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+	/* type 5: ADM1025, ADM1030 and ADM1031 evaluation boards */
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+	{
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+		.setsda	= { 0x02, PORT_DATA, 1 },
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+		.setscl	= { 0x01, PORT_DATA, 1 },
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+		.getsda	= { 0x10, PORT_STAT, 1 },
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+	},
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+	/* type 6: Barco LPT->DVI (K5800236) adapter */
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+	{
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+		.setsda	= { 0x02, PORT_DATA, 1 },
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+		.setscl	= { 0x01, PORT_DATA, 1 },
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+		.getsda	= { 0x20, PORT_STAT, 0 },
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+		.getscl	= { 0x40, PORT_STAT, 0 },
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+		.init	= { 0xfc, PORT_DATA, 0 },
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+	},
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+	/* type 7: One For All JP1 parallel port adapter */
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+	{
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+		.setsda	= { 0x01, PORT_DATA, 0 },
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+		.setscl	= { 0x02, PORT_DATA, 0 },
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+		.getsda	= { 0x80, PORT_STAT, 1 },
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+		.init	= { 0x04, PORT_DATA, 1 },
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+	},
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+	/* type 8: VCT-jig */
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+	{
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+		.setsda	= { 0x04, PORT_DATA, 1 },
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+		.setscl	= { 0x01, PORT_DATA, 1 },
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+		.getsda	= { 0x40, PORT_STAT, 0 },
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+		.getscl	= { 0x80, PORT_STAT, 1 },
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+	},
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+};
37112 
38113 /* ----- Device list ------------------------------------------------------ */
39114 
....@@ -48,9 +123,30 @@
48123 
49124 static LIST_HEAD(adapter_list);
50125 static DEFINE_MUTEX(adapter_list_lock);
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+
51127 #define MAX_DEVICE 4
52128 static int parport[MAX_DEVICE] = {0, -1, -1, -1};
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+module_param_array(parport, int, NULL, 0);
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+MODULE_PARM_DESC(parport,
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+		 "List of parallel ports to bind to, by index.\n"
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+		 " At most " __stringify(MAX_DEVICE) " devices are supported.\n"
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+		 " Default is one device connected to parport0.\n"
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+);
53135 
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+static int type = -1;
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+module_param(type, int, 0);
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+MODULE_PARM_DESC(type,
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+	"Type of adapter:\n"
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+	" 0 = Philips adapter\n"
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+	" 1 = home brew teletext adapter\n"
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+	" 2 = Velleman K8000 adapter\n"
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+	" 3 = ELV adapter\n"
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+	" 4 = ADM1032 evaluation board\n"
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+	" 5 = ADM1025, ADM1030 and ADM1031 evaluation boards\n"
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+	" 6 = Barco LPT->DVI (K5800236) adapter\n"
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+	" 7 = One For All JP1 parallel port adapter\n"
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+	" 8 = VCT-jig\n"
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+);
54150 
55151 /* ----- Low-level parallel port access ----------------------------------- */
56152 
....@@ -237,13 +333,17 @@
237333 
238334 	/* Setup SMBus alert if supported */
239335 	if (adapter_parm[type].smbus_alert) {
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-		adapter->ara = i2c_setup_smbus_alert(&adapter->adapter,
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-						     &adapter->alert_data);
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-		if (adapter->ara)
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+		struct i2c_client *ara;
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+
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+		ara = i2c_new_smbus_alert_device(&adapter->adapter,
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+						 &adapter->alert_data);
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+		if (!IS_ERR(ara)) {
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+			adapter->ara = ara;
243342 			parport_enable_irq(port);
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-		else
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+		} else {
245344 			dev_warn(&adapter->pdev->dev,
246345 				 "Failed to register ARA client\n");
346
+		}
247347 	}
248348 
249349 	/* Add the new adapter to the list */
....@@ -318,13 +418,6 @@
318418 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
319419 MODULE_DESCRIPTION("I2C bus over parallel port");
320420 MODULE_LICENSE("GPL");
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-
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-module_param_array(parport, int, NULL, 0);
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-MODULE_PARM_DESC(parport,
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-		 "List of parallel ports to bind to, by index.\n"
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-		 " Atmost " __stringify(MAX_DEVICE) " devices are supported.\n"
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-		 " Default is one device connected to parport0.\n"
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-);
328421 
329422 module_init(i2c_parport_init);
330423 module_exit(i2c_parport_exit);