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Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-elektor.c')
-rw-r--r--ANDROID_3.4.5/drivers/i2c/busses/i2c-elektor.c347
1 files changed, 0 insertions, 347 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-elektor.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-elektor.c
deleted file mode 100644
index 37e2e82a..00000000
--- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-elektor.c
+++ /dev/null
@@ -1,347 +0,0 @@
-/* ------------------------------------------------------------------------- */
-/* 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> */
-
-/* Partially 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/init.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/wait.h>
-
-#include <linux/isa.h>
-#include <linux/i2c.h>
-#include <linux/i2c-algo-pcf.h>
-#include <linux/io.h>
-
-#include <asm/irq.h>
-
-#include "../algos/i2c-algo-pcf.h"
-
-#define DEFAULT_BASE 0x330
-
-static int base;
-static u8 __iomem *base_iomem;
-
-static int irq;
-static int clock = 0x1c;
-static int own = 0x55;
-static int mmapped;
-
-/* 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;
-static spinlock_t lock;
-
-static struct i2c_adapter pcf_isa_ops;
-
-/* ----- local functions ---------------------------------------------- */
-
-static void pcf_isa_setbyte(void *data, int ctl, int val)
-{
- u8 __iomem *address = ctl ? (base_iomem + 1) : base_iomem;
-
- /* enable irq if any specified for serial operation */
- if (ctl && irq && (val & I2C_PCF_ESO)) {
- val |= I2C_PCF_ENI;
- }
-
- pr_debug("%s: Write %p 0x%02X\n", pcf_isa_ops.name, address, val);
- iowrite8(val, address);
-#ifdef __alpha__
- /* API UP2000 needs some hardware fudging to make the write stick */
- iowrite8(val, address);
-#endif
-}
-
-static int pcf_isa_getbyte(void *data, int ctl)
-{
- u8 __iomem *address = ctl ? (base_iomem + 1) : base_iomem;
- int val = ioread8(address);
-
- pr_debug("%s: Read %p 0x%02X\n", pcf_isa_ops.name, 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 *data)
-{
- DEFINE_WAIT(wait);
- int timeout = 2;
- unsigned long flags;
-
- if (irq > 0) {
- spin_lock_irqsave(&lock, flags);
- if (pcf_pending == 0) {
- spin_unlock_irqrestore(&lock, flags);
- prepare_to_wait(&pcf_wait, &wait, TASK_INTERRUPTIBLE);
- if (schedule_timeout(timeout*HZ)) {
- spin_lock_irqsave(&lock, flags);
- if (pcf_pending == 1) {
- pcf_pending = 0;
- }
- spin_unlock_irqrestore(&lock, flags);
- }
- finish_wait(&pcf_wait, &wait);
- } else {
- pcf_pending = 0;
- spin_unlock_irqrestore(&lock, flags);
- }
- } else {
- udelay(100);
- }
-}
-
-
-static irqreturn_t pcf_isa_handler(int this_irq, void *dev_id) {
- spin_lock(&lock);
- pcf_pending = 1;
- spin_unlock(&lock);
- wake_up_interruptible(&pcf_wait);
- return IRQ_HANDLED;
-}
-
-
-static int pcf_isa_init(void)
-{
- spin_lock_init(&lock);
- if (!mmapped) {
- if (!request_region(base, 2, pcf_isa_ops.name)) {
- printk(KERN_ERR "%s: requested I/O region (%#x:2) is "
- "in use\n", pcf_isa_ops.name, base);
- return -ENODEV;
- }
- base_iomem = ioport_map(base, 2);
- if (!base_iomem) {
- printk(KERN_ERR "%s: remap of I/O region %#x failed\n",
- pcf_isa_ops.name, base);
- release_region(base, 2);
- return -ENODEV;
- }
- } else {
- if (!request_mem_region(base, 2, pcf_isa_ops.name)) {
- printk(KERN_ERR "%s: requested memory region (%#x:2) "
- "is in use\n", pcf_isa_ops.name, base);
- return -ENODEV;
- }
- base_iomem = ioremap(base, 2);
- if (base_iomem == NULL) {
- printk(KERN_ERR "%s: remap of memory region %#x "
- "failed\n", pcf_isa_ops.name, base);
- release_mem_region(base, 2);
- return -ENODEV;
- }
- }
- pr_debug("%s: registers %#x remapped to %p\n", pcf_isa_ops.name, base,
- base_iomem);
-
- if (irq > 0) {
- if (request_irq(irq, pcf_isa_handler, 0, pcf_isa_ops.name,
- NULL) < 0) {
- printk(KERN_ERR "%s: Request irq%d failed\n",
- pcf_isa_ops.name, 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,
-};
-
-static struct i2c_adapter pcf_isa_ops = {
- .owner = THIS_MODULE,
- .class = I2C_CLASS_HWMON | I2C_CLASS_SPD,
- .algo_data = &pcf_isa_data,
- .name = "i2c-elektor",
-};
-
-static int __devinit elektor_match(struct device *dev, unsigned int id)
-{
-#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;
-
- cy693_dev = pci_get_device(PCI_VENDOR_ID_CONTAQ,
- PCI_DEVICE_ID_CONTAQ_82C693, NULL);
- if (cy693_dev) {
- unsigned char config;
- /* yeap, we've found cypress, let's check config */
- if (!pci_read_config_byte(cy693_dev, 0x47, &config)) {
-
- dev_dbg(dev, "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;
- mmapped = 1;
- /* UP2000 drives ISA with
- 8.25 MHz (PCI/4) clock
- (this can be read from cypress) */
- clock = I2C_PCF_CLK | I2C_PCF_TRNS90;
- dev_info(dev, "found API UP2000 like "
- "board, will probe PCF8584 "
- "later\n");
- }
- }
- pci_dev_put(cy693_dev);
- }
- }
-#endif
-
- /* sanity checks for mmapped I/O */
- if (mmapped && base < 0xc8000) {
- dev_err(dev, "incorrect base address (%#x) specified "
- "for mmapped I/O\n", base);
- return 0;
- }
-
- if (base == 0) {
- base = DEFAULT_BASE;
- }
- return 1;
-}
-
-static int __devinit elektor_probe(struct device *dev, unsigned int id)
-{
- init_waitqueue_head(&pcf_wait);
- if (pcf_isa_init())
- return -ENODEV;
- pcf_isa_ops.dev.parent = dev;
- if (i2c_pcf_add_bus(&pcf_isa_ops) < 0)
- goto fail;
-
- dev_info(dev, "found device at %#x\n", base);
-
- return 0;
-
- fail:
- if (irq > 0) {
- disable_irq(irq);
- free_irq(irq, NULL);
- }
-
- if (!mmapped) {
- ioport_unmap(base_iomem);
- release_region(base, 2);
- } else {
- iounmap(base_iomem);
- release_mem_region(base, 2);
- }
- return -ENODEV;
-}
-
-static int __devexit elektor_remove(struct device *dev, unsigned int id)
-{
- i2c_del_adapter(&pcf_isa_ops);
-
- if (irq > 0) {
- disable_irq(irq);
- free_irq(irq, NULL);
- }
-
- if (!mmapped) {
- ioport_unmap(base_iomem);
- release_region(base, 2);
- } else {
- iounmap(base_iomem);
- release_mem_region(base, 2);
- }
-
- return 0;
-}
-
-static struct isa_driver i2c_elektor_driver = {
- .match = elektor_match,
- .probe = elektor_probe,
- .remove = __devexit_p(elektor_remove),
- .driver = {
- .owner = THIS_MODULE,
- .name = "i2c-elektor",
- },
-};
-
-static int __init i2c_pcfisa_init(void)
-{
- return isa_register_driver(&i2c_elektor_driver, 1);
-}
-
-static void __exit i2c_pcfisa_exit(void)
-{
- isa_unregister_driver(&i2c_elektor_driver);
-}
-
-MODULE_AUTHOR("Hans Berglund <hb@spacetec.no>");
-MODULE_DESCRIPTION("I2C-Bus adapter routines for PCF8584 ISA bus adapter");
-MODULE_LICENSE("GPL");
-
-module_param(base, int, 0);
-module_param(irq, int, 0);
-module_param(clock, int, 0);
-module_param(own, int, 0);
-module_param(mmapped, int, 0);
-
-module_init(i2c_pcfisa_init);
-module_exit(i2c_pcfisa_exit);
generated by cgit (git 2.34.1) at 2025-03-30 20:19:07 +0000