diff options
| -rw-r--r-- | Documentation/i2c/busses/i2c-parport-light.rst | 24 | ||||
| -rw-r--r-- | Documentation/i2c/busses/index.rst | 1 | ||||
| -rw-r--r-- | MAINTAINERS | 2 | ||||
| -rw-r--r-- | drivers/i2c/busses/Kconfig | 28 | ||||
| -rw-r--r-- | drivers/i2c/busses/Makefile | 1 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-parport-light.c | 267 |
6 files changed, 0 insertions, 323 deletions
diff --git a/Documentation/i2c/busses/i2c-parport-light.rst b/Documentation/i2c/busses/i2c-parport-light.rst deleted file mode 100644 index e73af975d2c8..000000000000 --- a/Documentation/i2c/busses/i2c-parport-light.rst +++ /dev/null @@ -1,24 +0,0 @@ -=============================== -Kernel driver i2c-parport-light -=============================== - -Author: Jean Delvare <jdelvare@suse.de> - -This driver is a light version of i2c-parport. It doesn't depend -on the parport driver, and uses direct I/O access instead. This might be -preferred on embedded systems where wasting memory for the clean but heavy -parport handling is not an option. The drawback is a reduced portability -and the impossibility to daisy-chain other parallel port devices. - -Please see i2c-parport for documentation. - -Module parameters: - -* type: type of adapter (see i2c-parport or modinfo) - -* base: base I/O address - Default is 0x378 which is fairly common for parallel ports, at least on PC. - -* irq: optional IRQ - This must be passed if you want SMBus alert support, assuming your adapter - actually supports this. diff --git a/Documentation/i2c/busses/index.rst b/Documentation/i2c/busses/index.rst index 2a26e251a335..5e4077b08d86 100644 --- a/Documentation/i2c/busses/index.rst +++ b/Documentation/i2c/busses/index.rst @@ -20,7 +20,6 @@ I2C Bus Drivers i2c-nforce2 i2c-nvidia-gpu i2c-ocores - i2c-parport-light i2c-parport i2c-pca-isa i2c-piix4 diff --git a/MAINTAINERS b/MAINTAINERS index cc0a4a8ae06a..0a84db6d9653 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7720,9 +7720,7 @@ M: Jean Delvare <jdelvare@suse.com> L: linux-i2c@vger.kernel.org S: Maintained F: Documentation/i2c/busses/i2c-parport.rst -F: Documentation/i2c/busses/i2c-parport-light.rst F: drivers/i2c/busses/i2c-parport.c -F: drivers/i2c/busses/i2c-parport-light.c I2C SUBSYSTEM M: Wolfram Sang <wsa@the-dreams.de> diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index 6a0aa76859f3..933f15f0ad67 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -1211,37 +1211,9 @@ config I2C_PARPORT An adapter type parameter is now mandatory. Please read the file Documentation/i2c/busses/i2c-parport.rst for details. - Another driver exists, named i2c-parport-light, which doesn't depend - on the parport driver. This is meant for embedded systems. Don't say - Y here if you intend to say Y or M there. - This support is also available as a module. If so, the module will be called i2c-parport. -config I2C_PARPORT_LIGHT - tristate "Parallel port adapter (light)" - select I2C_ALGOBIT - select I2C_SMBUS - help - This supports parallel port I2C adapters such as the ones made by - Philips or Velleman, Analog Devices evaluation boards, and more. - Basically any adapter using the parallel port as an I2C bus with - no extra chipset is supported by this driver, or could be. - - This driver is a light version of i2c-parport. It doesn't depend - on the parport driver, and uses direct I/O access instead. This - might be preferred on embedded systems where wasting memory for - the clean but heavy parport handling is not an option. The - drawback is a reduced portability and the impossibility to - daisy-chain other parallel port devices. - - Don't say Y here if you said Y or M to i2c-parport. Saying M to - both is possible but both modules should not be loaded at the same - time. - - This support is also available as a module. If so, the module - will be called i2c-parport-light. - config I2C_ROBOTFUZZ_OSIF tristate "RobotFuzz Open Source InterFace USB adapter" depends on USB diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile index 3ab8aebc39c9..25d60889713c 100644 --- a/drivers/i2c/busses/Makefile +++ b/drivers/i2c/busses/Makefile @@ -128,7 +128,6 @@ obj-$(CONFIG_I2C_ZX2967) += i2c-zx2967.o obj-$(CONFIG_I2C_DIOLAN_U2C) += i2c-diolan-u2c.o obj-$(CONFIG_I2C_DLN2) += i2c-dln2.o obj-$(CONFIG_I2C_PARPORT) += i2c-parport.o -obj-$(CONFIG_I2C_PARPORT_LIGHT) += i2c-parport-light.o obj-$(CONFIG_I2C_ROBOTFUZZ_OSIF) += i2c-robotfuzz-osif.o obj-$(CONFIG_I2C_TAOS_EVM) += i2c-taos-evm.o obj-$(CONFIG_I2C_TINY_USB) += i2c-tiny-usb.o diff --git a/drivers/i2c/busses/i2c-parport-light.c b/drivers/i2c/busses/i2c-parport-light.c deleted file mode 100644 index 00f6aaf22cfc..000000000000 --- a/drivers/i2c/busses/i2c-parport-light.c +++ /dev/null @@ -1,267 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* ------------------------------------------------------------------------ * - * i2c-parport-light.c I2C bus over parallel port * - * ------------------------------------------------------------------------ * - Copyright (C) 2003-2010 Jean Delvare <jdelvare@suse.de> - - Based on older i2c-velleman.c driver - Copyright (C) 1995-2000 Simon G. Vogl - With some changes from: - Frodo Looijaard <frodol@dds.nl> - Kyösti Mälkki <kmalkki@cc.hut.fi> - - * ------------------------------------------------------------------------ */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/platform_device.h> -#include <linux/ioport.h> -#include <linux/i2c.h> -#include <linux/i2c-algo-bit.h> -#include <linux/i2c-smbus.h> -#include <linux/io.h> -#include "i2c-parport.h" - -#define DEFAULT_BASE 0x378 -#define DRVNAME "i2c-parport-light" - -static struct platform_device *pdev; - -static u16 base; -module_param_hw(base, ushort, ioport, 0); -MODULE_PARM_DESC(base, "Base I/O address"); - -static int irq; -module_param_hw(irq, int, irq, 0); -MODULE_PARM_DESC(irq, "IRQ (optional)"); - -/* ----- Low-level parallel port access ----------------------------------- */ - -static inline void port_write(unsigned char p, unsigned char d) -{ - outb(d, base+p); -} - -static inline unsigned char port_read(unsigned char p) -{ - return inb(base+p); -} - -/* ----- Unified line operation functions --------------------------------- */ - -static inline void line_set(int state, const struct lineop *op) -{ - u8 oldval = port_read(op->port); - - /* Touch only the bit(s) needed */ - if ((op->inverted && !state) || (!op->inverted && state)) - port_write(op->port, oldval | op->val); - else - port_write(op->port, oldval & ~op->val); -} - -static inline int line_get(const struct lineop *op) -{ - u8 oldval = port_read(op->port); - - return ((op->inverted && (oldval & op->val) != op->val) - || (!op->inverted && (oldval & op->val) == op->val)); -} - -/* ----- I2C algorithm call-back functions and structures ----------------- */ - -static void parport_setscl(void *data, int state) -{ - line_set(state, &adapter_parm[type].setscl); -} - -static void parport_setsda(void *data, int state) -{ - line_set(state, &adapter_parm[type].setsda); -} - -static int parport_getscl(void *data) -{ - return line_get(&adapter_parm[type].getscl); -} - -static int parport_getsda(void *data) -{ - return line_get(&adapter_parm[type].getsda); -} - -/* Encapsulate the functions above in the correct structure - Note that getscl will be set to NULL by the attaching code for adapters - that cannot read SCL back */ -static struct i2c_algo_bit_data parport_algo_data = { - .setsda = parport_setsda, - .setscl = parport_setscl, - .getsda = parport_getsda, - .getscl = parport_getscl, - .udelay = 50, - .timeout = HZ, -}; - -/* ----- Driver registration ---------------------------------------------- */ - -static struct i2c_adapter parport_adapter = { - .owner = THIS_MODULE, - .class = I2C_CLASS_HWMON, - .algo_data = &parport_algo_data, - .name = "Parallel port adapter (light)", -}; - -/* SMBus alert support */ -static struct i2c_smbus_alert_setup alert_data = { -}; -static struct i2c_client *ara; -static struct lineop parport_ctrl_irq = { - .val = (1 << 4), - .port = PORT_CTRL, -}; - -static int i2c_parport_probe(struct platform_device *pdev) -{ - int err; - - /* Reset hardware to a sane state (SCL and SDA high) */ - parport_setsda(NULL, 1); - parport_setscl(NULL, 1); - /* Other init if needed (power on...) */ - if (adapter_parm[type].init.val) { - line_set(1, &adapter_parm[type].init); - /* Give powered devices some time to settle */ - msleep(100); - } - - parport_adapter.dev.parent = &pdev->dev; - err = i2c_bit_add_bus(&parport_adapter); - if (err) { - dev_err(&pdev->dev, "Unable to register with I2C\n"); - return err; - } - - /* Setup SMBus alert if supported */ - if (adapter_parm[type].smbus_alert && irq) { - alert_data.irq = irq; - ara = i2c_setup_smbus_alert(&parport_adapter, &alert_data); - if (ara) - line_set(1, &parport_ctrl_irq); - else - dev_warn(&pdev->dev, "Failed to register ARA client\n"); - } - - return 0; -} - -static int i2c_parport_remove(struct platform_device *pdev) -{ - if (ara) { - line_set(0, &parport_ctrl_irq); - i2c_unregister_device(ara); - ara = NULL; - } - i2c_del_adapter(&parport_adapter); - - /* Un-init if needed (power off...) */ - if (adapter_parm[type].init.val) - line_set(0, &adapter_parm[type].init); - - return 0; -} - -static struct platform_driver i2c_parport_driver = { - .driver = { - .name = DRVNAME, - }, - .probe = i2c_parport_probe, - .remove = i2c_parport_remove, -}; - -static int __init i2c_parport_device_add(u16 address) -{ - int err; - - pdev = platform_device_alloc(DRVNAME, -1); - if (!pdev) { - err = -ENOMEM; - printk(KERN_ERR DRVNAME ": Device allocation failed\n"); - goto exit; - } - - err = platform_device_add(pdev); - if (err) { - printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", - err); - goto exit_device_put; - } - - return 0; - -exit_device_put: - platform_device_put(pdev); -exit: - return err; -} - -static int __init i2c_parport_init(void) -{ - int err; - - if (type < 0) { - printk(KERN_ERR DRVNAME ": adapter type unspecified\n"); - return -ENODEV; - } - - if (type >= ARRAY_SIZE(adapter_parm)) { - printk(KERN_ERR DRVNAME ": invalid type (%d)\n", type); - return -ENODEV; - } - - if (base == 0) { - pr_info(DRVNAME ": using default base 0x%x\n", DEFAULT_BASE); - base = DEFAULT_BASE; - } - - if (!request_region(base, 3, DRVNAME)) - return -EBUSY; - - if (irq != 0) - pr_info(DRVNAME ": using irq %d\n", irq); - - if (!adapter_parm[type].getscl.val) - parport_algo_data.getscl = NULL; - - /* Sets global pdev as a side effect */ - err = i2c_parport_device_add(base); - if (err) - goto exit_release; - - err = platform_driver_register(&i2c_parport_driver); - if (err) - goto exit_device; - - return 0; - -exit_device: - platform_device_unregister(pdev); -exit_release: - release_region(base, 3); - return err; -} - -static void __exit i2c_parport_exit(void) -{ - platform_driver_unregister(&i2c_parport_driver); - platform_device_unregister(pdev); - release_region(base, 3); -} - -MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); -MODULE_DESCRIPTION("I2C bus over parallel port (light)"); -MODULE_LICENSE("GPL"); - -module_init(i2c_parport_init); -module_exit(i2c_parport_exit); |