diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-parport.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-parport.c | 174 |
1 files changed, 126 insertions, 48 deletions
diff --git a/drivers/i2c/busses/i2c-parport.c b/drivers/i2c/busses/i2c-parport.c index 319209a07353..3249bbd5eb43 100644 --- a/drivers/i2c/busses/i2c-parport.c +++ b/drivers/i2c/busses/i2c-parport.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* ------------------------------------------------------------------------ * * i2c-parport.c I2C bus over parallel port * * ------------------------------------------------------------------------ * @@ -9,15 +10,6 @@ Frodo Looijaard <frodol@dds.nl> Kyösti Mälkki <kmalkki@cc.hut.fi> - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. * ------------------------------------------------------------------------ */ #define pr_fmt(fmt) "i2c-parport: " fmt @@ -33,7 +25,90 @@ #include <linux/slab.h> #include <linux/list.h> #include <linux/mutex.h> -#include "i2c-parport.h" + +#define PORT_DATA 0 +#define PORT_STAT 1 +#define PORT_CTRL 2 + +struct lineop { + u8 val; + u8 port; + u8 inverted; +}; + +struct adapter_parm { + struct lineop setsda; + struct lineop setscl; + struct lineop getsda; + struct lineop getscl; + struct lineop init; + unsigned int smbus_alert:1; +}; + +static const struct adapter_parm adapter_parm[] = { + /* type 0: Philips adapter */ + { + .setsda = { 0x80, PORT_DATA, 1 }, + .setscl = { 0x08, PORT_CTRL, 0 }, + .getsda = { 0x80, PORT_STAT, 0 }, + .getscl = { 0x08, PORT_STAT, 0 }, + }, + /* type 1: home brew teletext adapter */ + { + .setsda = { 0x02, PORT_DATA, 0 }, + .setscl = { 0x01, PORT_DATA, 0 }, + .getsda = { 0x80, PORT_STAT, 1 }, + }, + /* type 2: Velleman K8000 adapter */ + { + .setsda = { 0x02, PORT_CTRL, 1 }, + .setscl = { 0x08, PORT_CTRL, 1 }, + .getsda = { 0x10, PORT_STAT, 0 }, + }, + /* type 3: ELV adapter */ + { + .setsda = { 0x02, PORT_DATA, 1 }, + .setscl = { 0x01, PORT_DATA, 1 }, + .getsda = { 0x40, PORT_STAT, 1 }, + .getscl = { 0x08, PORT_STAT, 1 }, + }, + /* type 4: ADM1032 evaluation board */ + { + .setsda = { 0x02, PORT_DATA, 1 }, + .setscl = { 0x01, PORT_DATA, 1 }, + .getsda = { 0x10, PORT_STAT, 1 }, + .init = { 0xf0, PORT_DATA, 0 }, + .smbus_alert = 1, + }, + /* type 5: ADM1025, ADM1030 and ADM1031 evaluation boards */ + { + .setsda = { 0x02, PORT_DATA, 1 }, + .setscl = { 0x01, PORT_DATA, 1 }, + .getsda = { 0x10, PORT_STAT, 1 }, + }, + /* type 6: Barco LPT->DVI (K5800236) adapter */ + { + .setsda = { 0x02, PORT_DATA, 1 }, + .setscl = { 0x01, PORT_DATA, 1 }, + .getsda = { 0x20, PORT_STAT, 0 }, + .getscl = { 0x40, PORT_STAT, 0 }, + .init = { 0xfc, PORT_DATA, 0 }, + }, + /* type 7: One For All JP1 parallel port adapter */ + { + .setsda = { 0x01, PORT_DATA, 0 }, + .setscl = { 0x02, PORT_DATA, 0 }, + .getsda = { 0x80, PORT_STAT, 1 }, + .init = { 0x04, PORT_DATA, 1 }, + }, + /* type 8: VCT-jig */ + { + .setsda = { 0x04, PORT_DATA, 1 }, + .setscl = { 0x01, PORT_DATA, 1 }, + .getsda = { 0x40, PORT_STAT, 0 }, + .getscl = { 0x80, PORT_STAT, 1 }, + }, +}; /* ----- Device list ------------------------------------------------------ */ @@ -48,9 +123,30 @@ struct i2c_par { static LIST_HEAD(adapter_list); static DEFINE_MUTEX(adapter_list_lock); + #define MAX_DEVICE 4 static int parport[MAX_DEVICE] = {0, -1, -1, -1}; +module_param_array(parport, int, NULL, 0); +MODULE_PARM_DESC(parport, + "List of parallel ports to bind to, by index.\n" + " At most " __stringify(MAX_DEVICE) " devices are supported.\n" + " Default is one device connected to parport0.\n" +); +static int type = -1; +module_param(type, int, 0); +MODULE_PARM_DESC(type, + "Type of adapter:\n" + " 0 = Philips adapter\n" + " 1 = home brew teletext adapter\n" + " 2 = Velleman K8000 adapter\n" + " 3 = ELV adapter\n" + " 4 = ADM1032 evaluation board\n" + " 5 = ADM1025, ADM1030 and ADM1031 evaluation boards\n" + " 6 = Barco LPT->DVI (K5800236) adapter\n" + " 7 = One For All JP1 parallel port adapter\n" + " 8 = VCT-jig\n" +); /* ----- Low-level parallel port access ----------------------------------- */ @@ -171,6 +267,16 @@ static void i2c_parport_attach(struct parport *port) int i; struct pardev_cb i2c_parport_cb; + if (type < 0) { + pr_warn("adapter type unspecified\n"); + return; + } + + if (type >= ARRAY_SIZE(adapter_parm)) { + pr_warn("invalid type (%d)\n", type); + return; + } + for (i = 0; i < MAX_DEVICE; i++) { if (parport[i] == -1) continue; @@ -202,7 +308,7 @@ static void i2c_parport_attach(struct parport *port) /* Fill the rest of the structure */ adapter->adapter.owner = THIS_MODULE; adapter->adapter.class = I2C_CLASS_HWMON; - strlcpy(adapter->adapter.name, "Parallel port adapter", + strscpy(adapter->adapter.name, "Parallel port adapter", sizeof(adapter->adapter.name)); adapter->algo_data = parport_algo_data; /* Slow down if we can't sense SCL */ @@ -237,13 +343,17 @@ static void i2c_parport_attach(struct parport *port) /* Setup SMBus alert if supported */ if (adapter_parm[type].smbus_alert) { - adapter->ara = i2c_setup_smbus_alert(&adapter->adapter, - &adapter->alert_data); - if (adapter->ara) + struct i2c_client *ara; + + ara = i2c_new_smbus_alert_device(&adapter->adapter, + &adapter->alert_data); + if (!IS_ERR(ara)) { + adapter->ara = ara; parport_enable_irq(port); - else + } else { dev_warn(&adapter->pdev->dev, "Failed to register ARA client\n"); + } } /* Add the new adapter to the list */ @@ -290,41 +400,9 @@ static struct parport_driver i2c_parport_driver = { .name = "i2c-parport", .match_port = i2c_parport_attach, .detach = i2c_parport_detach, - .devmodel = true, }; - -/* ----- Module loading, unloading and information ------------------------ */ - -static int __init i2c_parport_init(void) -{ - if (type < 0) { - pr_warn("adapter type unspecified\n"); - return -ENODEV; - } - - if (type >= ARRAY_SIZE(adapter_parm)) { - pr_warn("invalid type (%d)\n", type); - return -ENODEV; - } - - return parport_register_driver(&i2c_parport_driver); -} - -static void __exit i2c_parport_exit(void) -{ - parport_unregister_driver(&i2c_parport_driver); -} +module_parport_driver(i2c_parport_driver); MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); MODULE_DESCRIPTION("I2C bus over parallel port"); MODULE_LICENSE("GPL"); - -module_param_array(parport, int, NULL, 0); -MODULE_PARM_DESC(parport, - "List of parallel ports to bind to, by index.\n" - " Atmost " __stringify(MAX_DEVICE) " devices are supported.\n" - " Default is one device connected to parport0.\n" -); - -module_init(i2c_parport_init); -module_exit(i2c_parport_exit); |