This support is also available as a module. If so, the module
will be called i2c-algo-pcf.
-config I2C_ELEKTOR
- tristate "Elektor ISA card"
- depends on I2C_ALGOPCF && BROKEN_ON_SMP
- help
- This supports the PCF8584 ISA bus I2C adapter. Say Y if you own
- such an adapter.
-
- This support is also available as a module. If so, the module
- will be called i2c-elektor.
-
config I2C_KEYWEST
tristate "Powermac Keywest I2C interface"
depends on I2C && PPC_PMAC
obj-$(CONFIG_I2C_ALGOBIT) += i2c-algo-bit.o
obj-$(CONFIG_I2C_VELLEMAN) += i2c-velleman.o
obj-$(CONFIG_I2C_ALGOPCF) += i2c-algo-pcf.o
-obj-$(CONFIG_I2C_ELEKTOR) += i2c-elektor.o
obj-$(CONFIG_I2C_KEYWEST) += i2c-keywest.o
obj-$(CONFIG_ITE_I2C_ALGO) += i2c-algo-ite.o
obj-$(CONFIG_ITE_I2C_ADAP) += i2c-adap-ite.o
This driver can also be built as a module. If so, the module
will be called i2c-amd8111.
+config I2C_ELEKTOR
+ tristate "Elektor ISA card"
+ depends on I2C_ALGOPCF && BROKEN_ON_SMP
+ help
+ This supports the PCF8584 ISA bus I2C adapter. Say Y if you own
+ such an adapter.
+
+ This support is also available as a module. If so, the module
+ will be called i2c-elektor.
+
config I2C_ELV
tristate "ELV adapter"
depends on I2C_ALGOBIT && ISA
obj-$(CONFIG_I2C_ALI15X3) += i2c-ali15x3.o
obj-$(CONFIG_I2C_AMD756) += i2c-amd756.o
obj-$(CONFIG_I2C_AMD8111) += i2c-amd8111.o
+obj-$(CONFIG_I2C_ELEKTOR) += i2c-elektor.o
obj-$(CONFIG_I2C_ELV) += i2c-elv.o
obj-$(CONFIG_I2C_I801) += i2c-i801.o
obj-$(CONFIG_I2C_I810) += i2c-i810.o
--- /dev/null
+/* ------------------------------------------------------------------------- */
+/* i2c-elektor.c i2c-hw access for PCF8584 style isa bus adaptes */
+/* ------------------------------------------------------------------------- */
+/* Copyright (C) 1995-97 Simon G. Vogl
+ 1998-99 Hans Berglund
+
+ 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.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+/* ------------------------------------------------------------------------- */
+
+/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
+ Frodo Looijaard <frodol@dds.nl> */
+
+/* Partialy rewriten by Oleg I. Vdovikin for mmapped support of
+ for Alpha Processor Inc. UP-2000(+) boards */
+
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/wait.h>
+
+#include <linux/i2c.h>
+#include <linux/i2c-algo-pcf.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#include "../i2c-pcf8584.h"
+
+#define DEFAULT_BASE 0x330
+
+static int base;
+static int irq;
+static int clock = 0x1c;
+static int own = 0x55;
+static int mmapped;
+static int i2c_debug;
+
+/* vdovikin: removed static struct i2c_pcf_isa gpi; code -
+ this module in real supports only one device, due to missing arguments
+ in some functions, called from the algo-pcf module. Sometimes it's
+ need to be rewriten - but for now just remove this for simpler reading */
+
+static wait_queue_head_t pcf_wait;
+static int pcf_pending;
+
+/* ----- global defines ----------------------------------------------- */
+#define DEB(x) if (i2c_debug>=1) x
+#define DEB2(x) if (i2c_debug>=2) x
+#define DEB3(x) if (i2c_debug>=3) x
+#define DEBE(x) x /* error messages */
+
+/* ----- local functions ---------------------------------------------- */
+
+static void pcf_isa_setbyte(void *data, int ctl, int val)
+{
+ int address = ctl ? (base + 1) : base;
+
+ /* enable irq if any specified for serial operation */
+ if (ctl && irq && (val & I2C_PCF_ESO)) {
+ val |= I2C_PCF_ENI;
+ }
+
+ DEB3(printk(KERN_DEBUG "i2c-elektor.o: Write 0x%X 0x%02X\n", address, val & 255));
+
+ switch (mmapped) {
+ case 0: /* regular I/O */
+ outb(val, address);
+ break;
+ case 2: /* double mapped I/O needed for UP2000 board,
+ I don't know why this... */
+ writeb(val, address);
+ /* fall */
+ case 1: /* memory mapped I/O */
+ writeb(val, address);
+ break;
+ }
+}
+
+static int pcf_isa_getbyte(void *data, int ctl)
+{
+ int address = ctl ? (base + 1) : base;
+ int val = mmapped ? readb(address) : inb(address);
+
+ DEB3(printk(KERN_DEBUG "i2c-elektor.o: Read 0x%X 0x%02X\n", address, val));
+
+ return (val);
+}
+
+static int pcf_isa_getown(void *data)
+{
+ return (own);
+}
+
+
+static int pcf_isa_getclock(void *data)
+{
+ return (clock);
+}
+
+static void pcf_isa_waitforpin(void) {
+
+ int timeout = 2;
+
+ if (irq > 0) {
+ cli();
+ if (pcf_pending == 0) {
+ interruptible_sleep_on_timeout(&pcf_wait, timeout*HZ );
+ } else
+ pcf_pending = 0;
+ sti();
+ } else {
+ udelay(100);
+ }
+}
+
+
+static irqreturn_t pcf_isa_handler(int this_irq, void *dev_id, struct pt_regs *regs) {
+ pcf_pending = 1;
+ wake_up_interruptible(&pcf_wait);
+ return IRQ_HANDLED;
+}
+
+
+static int pcf_isa_init(void)
+{
+ if (!mmapped) {
+ if (!request_region(base, 2, "i2c (isa bus adapter)")) {
+ printk(KERN_ERR
+ "i2c-elektor.o: requested I/O region (0x%X:2) "
+ "is in use.\n", base);
+ return -ENODEV;
+ }
+ }
+ if (irq > 0) {
+ if (request_irq(irq, pcf_isa_handler, 0, "PCF8584", 0) < 0) {
+ printk(KERN_ERR "i2c-elektor.o: Request irq%d failed\n", irq);
+ irq = 0;
+ } else
+ enable_irq(irq);
+ }
+ return 0;
+}
+
+/* ------------------------------------------------------------------------
+ * Encapsulate the above functions in the correct operations structure.
+ * This is only done when more than one hardware adapter is supported.
+ */
+static struct i2c_algo_pcf_data pcf_isa_data = {
+ .setpcf = pcf_isa_setbyte,
+ .getpcf = pcf_isa_getbyte,
+ .getown = pcf_isa_getown,
+ .getclock = pcf_isa_getclock,
+ .waitforpin = pcf_isa_waitforpin,
+ .udelay = 10,
+ .mdelay = 10,
+ .timeout = 100,
+};
+
+static struct i2c_adapter pcf_isa_ops = {
+ .owner = THIS_MODULE,
+ .id = I2C_HW_P_ELEK,
+ .algo_data = &pcf_isa_data,
+ .name = "PCF8584 ISA adapter",
+};
+
+static int __init i2c_pcfisa_init(void)
+{
+#ifdef __alpha__
+ /* check to see we have memory mapped PCF8584 connected to the
+ Cypress cy82c693 PCI-ISA bridge as on UP2000 board */
+ if (base == 0) {
+
+ struct pci_dev *cy693_dev =
+ pci_find_device(PCI_VENDOR_ID_CONTAQ,
+ PCI_DEVICE_ID_CONTAQ_82C693, NULL);
+
+ if (cy693_dev) {
+ char config;
+ /* yeap, we've found cypress, let's check config */
+ if (!pci_read_config_byte(cy693_dev, 0x47, &config)) {
+
+ DEB3(printk(KERN_DEBUG "i2c-elektor.o: found cy82c693, config register 0x47 = 0x%02x.\n", config));
+
+ /* UP2000 board has this register set to 0xe1,
+ but the most significant bit as seems can be
+ reset during the proper initialisation
+ sequence if guys from API decides to do that
+ (so, we can even enable Tsunami Pchip
+ window for the upper 1 Gb) */
+
+ /* so just check for ROMCS at 0xe0000,
+ ROMCS enabled for writes
+ and external XD Bus buffer in use. */
+ if ((config & 0x7f) == 0x61) {
+ /* seems to be UP2000 like board */
+ base = 0xe0000;
+ /* I don't know why we need to
+ write twice */
+ mmapped = 2;
+ /* UP2000 drives ISA with
+ 8.25 MHz (PCI/4) clock
+ (this can be read from cypress) */
+ clock = I2C_PCF_CLK | I2C_PCF_TRNS90;
+ printk(KERN_INFO "i2c-elektor.o: found API UP2000 like board, will probe PCF8584 later.\n");
+ }
+ }
+ }
+ }
+#endif
+
+ /* sanity checks for mmapped I/O */
+ if (mmapped && base < 0xc8000) {
+ printk(KERN_ERR "i2c-elektor.o: incorrect base address (0x%0X) specified for mmapped I/O.\n", base);
+ return -ENODEV;
+ }
+
+ printk(KERN_INFO "i2c-elektor.o: i2c pcf8584-isa adapter module version %s (%s)\n", I2C_VERSION, I2C_DATE);
+
+ if (base == 0) {
+ base = DEFAULT_BASE;
+ }
+
+ init_waitqueue_head(&pcf_wait);
+ if (pcf_isa_init())
+ return -ENODEV;
+ if (i2c_pcf_add_bus(&pcf_isa_ops) < 0)
+ goto fail;
+
+ printk(KERN_ERR "i2c-elektor.o: found device at %#x.\n", base);
+
+ return 0;
+
+ fail:
+ if (irq > 0) {
+ disable_irq(irq);
+ free_irq(irq, 0);
+ }
+
+ if (!mmapped)
+ release_region(base , 2);
+ return -ENODEV;
+}
+
+static void i2c_pcfisa_exit(void)
+{
+ i2c_pcf_del_bus(&pcf_isa_ops);
+
+ if (irq > 0) {
+ disable_irq(irq);
+ free_irq(irq, 0);
+ }
+
+ if (!mmapped)
+ release_region(base , 2);
+}
+
+MODULE_AUTHOR("Hans Berglund <hb@spacetec.no>");
+MODULE_DESCRIPTION("I2C-Bus adapter routines for PCF8584 ISA bus adapter");
+MODULE_LICENSE("GPL");
+
+MODULE_PARM(base, "i");
+MODULE_PARM(irq, "i");
+MODULE_PARM(clock, "i");
+MODULE_PARM(own, "i");
+MODULE_PARM(mmapped, "i");
+MODULE_PARM(i2c_debug, "i");
+
+module_init(i2c_pcfisa_init);
+module_exit(i2c_pcfisa_exit);
+++ /dev/null
-/* ------------------------------------------------------------------------- */
-/* i2c-elektor.c i2c-hw access for PCF8584 style isa bus adaptes */
-/* ------------------------------------------------------------------------- */
-/* Copyright (C) 1995-97 Simon G. Vogl
- 1998-99 Hans Berglund
-
- 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.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-/* ------------------------------------------------------------------------- */
-
-/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
- Frodo Looijaard <frodol@dds.nl> */
-
-/* Partialy rewriten by Oleg I. Vdovikin for mmapped support of
- for Alpha Processor Inc. UP-2000(+) boards */
-
-#include <linux/kernel.h>
-#include <linux/ioport.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/wait.h>
-
-#include <linux/i2c.h>
-#include <linux/i2c-algo-pcf.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
-
-#include "i2c-pcf8584.h"
-
-#define DEFAULT_BASE 0x330
-
-static int base;
-static int irq;
-static int clock = 0x1c;
-static int own = 0x55;
-static int mmapped;
-static int i2c_debug;
-
-/* vdovikin: removed static struct i2c_pcf_isa gpi; code -
- this module in real supports only one device, due to missing arguments
- in some functions, called from the algo-pcf module. Sometimes it's
- need to be rewriten - but for now just remove this for simpler reading */
-
-static wait_queue_head_t pcf_wait;
-static int pcf_pending;
-
-/* ----- global defines ----------------------------------------------- */
-#define DEB(x) if (i2c_debug>=1) x
-#define DEB2(x) if (i2c_debug>=2) x
-#define DEB3(x) if (i2c_debug>=3) x
-#define DEBE(x) x /* error messages */
-
-/* ----- local functions ---------------------------------------------- */
-
-static void pcf_isa_setbyte(void *data, int ctl, int val)
-{
- int address = ctl ? (base + 1) : base;
-
- /* enable irq if any specified for serial operation */
- if (ctl && irq && (val & I2C_PCF_ESO)) {
- val |= I2C_PCF_ENI;
- }
-
- DEB3(printk(KERN_DEBUG "i2c-elektor.o: Write 0x%X 0x%02X\n", address, val & 255));
-
- switch (mmapped) {
- case 0: /* regular I/O */
- outb(val, address);
- break;
- case 2: /* double mapped I/O needed for UP2000 board,
- I don't know why this... */
- writeb(val, address);
- /* fall */
- case 1: /* memory mapped I/O */
- writeb(val, address);
- break;
- }
-}
-
-static int pcf_isa_getbyte(void *data, int ctl)
-{
- int address = ctl ? (base + 1) : base;
- int val = mmapped ? readb(address) : inb(address);
-
- DEB3(printk(KERN_DEBUG "i2c-elektor.o: Read 0x%X 0x%02X\n", address, val));
-
- return (val);
-}
-
-static int pcf_isa_getown(void *data)
-{
- return (own);
-}
-
-
-static int pcf_isa_getclock(void *data)
-{
- return (clock);
-}
-
-static void pcf_isa_waitforpin(void) {
-
- int timeout = 2;
-
- if (irq > 0) {
- cli();
- if (pcf_pending == 0) {
- interruptible_sleep_on_timeout(&pcf_wait, timeout*HZ );
- } else
- pcf_pending = 0;
- sti();
- } else {
- udelay(100);
- }
-}
-
-
-static irqreturn_t pcf_isa_handler(int this_irq, void *dev_id, struct pt_regs *regs) {
- pcf_pending = 1;
- wake_up_interruptible(&pcf_wait);
- return IRQ_HANDLED;
-}
-
-
-static int pcf_isa_init(void)
-{
- if (!mmapped) {
- if (!request_region(base, 2, "i2c (isa bus adapter)")) {
- printk(KERN_ERR
- "i2c-elektor.o: requested I/O region (0x%X:2) "
- "is in use.\n", base);
- return -ENODEV;
- }
- }
- if (irq > 0) {
- if (request_irq(irq, pcf_isa_handler, 0, "PCF8584", 0) < 0) {
- printk(KERN_ERR "i2c-elektor.o: Request irq%d failed\n", irq);
- irq = 0;
- } else
- enable_irq(irq);
- }
- return 0;
-}
-
-/* ------------------------------------------------------------------------
- * Encapsulate the above functions in the correct operations structure.
- * This is only done when more than one hardware adapter is supported.
- */
-static struct i2c_algo_pcf_data pcf_isa_data = {
- .setpcf = pcf_isa_setbyte,
- .getpcf = pcf_isa_getbyte,
- .getown = pcf_isa_getown,
- .getclock = pcf_isa_getclock,
- .waitforpin = pcf_isa_waitforpin,
- .udelay = 10,
- .mdelay = 10,
- .timeout = 100,
-};
-
-static struct i2c_adapter pcf_isa_ops = {
- .owner = THIS_MODULE,
- .id = I2C_HW_P_ELEK,
- .algo_data = &pcf_isa_data,
- .name = "PCF8584 ISA adapter",
-};
-
-static int __init i2c_pcfisa_init(void)
-{
-#ifdef __alpha__
- /* check to see we have memory mapped PCF8584 connected to the
- Cypress cy82c693 PCI-ISA bridge as on UP2000 board */
- if (base == 0) {
-
- struct pci_dev *cy693_dev =
- pci_find_device(PCI_VENDOR_ID_CONTAQ,
- PCI_DEVICE_ID_CONTAQ_82C693, NULL);
-
- if (cy693_dev) {
- char config;
- /* yeap, we've found cypress, let's check config */
- if (!pci_read_config_byte(cy693_dev, 0x47, &config)) {
-
- DEB3(printk(KERN_DEBUG "i2c-elektor.o: found cy82c693, config register 0x47 = 0x%02x.\n", config));
-
- /* UP2000 board has this register set to 0xe1,
- but the most significant bit as seems can be
- reset during the proper initialisation
- sequence if guys from API decides to do that
- (so, we can even enable Tsunami Pchip
- window for the upper 1 Gb) */
-
- /* so just check for ROMCS at 0xe0000,
- ROMCS enabled for writes
- and external XD Bus buffer in use. */
- if ((config & 0x7f) == 0x61) {
- /* seems to be UP2000 like board */
- base = 0xe0000;
- /* I don't know why we need to
- write twice */
- mmapped = 2;
- /* UP2000 drives ISA with
- 8.25 MHz (PCI/4) clock
- (this can be read from cypress) */
- clock = I2C_PCF_CLK | I2C_PCF_TRNS90;
- printk(KERN_INFO "i2c-elektor.o: found API UP2000 like board, will probe PCF8584 later.\n");
- }
- }
- }
- }
-#endif
-
- /* sanity checks for mmapped I/O */
- if (mmapped && base < 0xc8000) {
- printk(KERN_ERR "i2c-elektor.o: incorrect base address (0x%0X) specified for mmapped I/O.\n", base);
- return -ENODEV;
- }
-
- printk(KERN_INFO "i2c-elektor.o: i2c pcf8584-isa adapter module version %s (%s)\n", I2C_VERSION, I2C_DATE);
-
- if (base == 0) {
- base = DEFAULT_BASE;
- }
-
- init_waitqueue_head(&pcf_wait);
- if (pcf_isa_init())
- return -ENODEV;
- if (i2c_pcf_add_bus(&pcf_isa_ops) < 0)
- goto fail;
-
- printk(KERN_ERR "i2c-elektor.o: found device at %#x.\n", base);
-
- return 0;
-
- fail:
- if (irq > 0) {
- disable_irq(irq);
- free_irq(irq, 0);
- }
-
- if (!mmapped)
- release_region(base , 2);
- return -ENODEV;
-}
-
-static void i2c_pcfisa_exit(void)
-{
- i2c_pcf_del_bus(&pcf_isa_ops);
-
- if (irq > 0) {
- disable_irq(irq);
- free_irq(irq, 0);
- }
-
- if (!mmapped)
- release_region(base , 2);
-}
-
-MODULE_AUTHOR("Hans Berglund <hb@spacetec.no>");
-MODULE_DESCRIPTION("I2C-Bus adapter routines for PCF8584 ISA bus adapter");
-MODULE_LICENSE("GPL");
-
-MODULE_PARM(base, "i");
-MODULE_PARM(irq, "i");
-MODULE_PARM(clock, "i");
-MODULE_PARM(own, "i");
-MODULE_PARM(mmapped, "i");
-MODULE_PARM(i2c_debug, "i");
-
-module_init(i2c_pcfisa_init);
-module_exit(i2c_pcfisa_exit);
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