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authorJean Delvare <khali@linux-fr.org>2006-12-10 15:21:29 -0500
committerJean Delvare <khali@arrakis.delvare>2006-12-10 15:21:29 -0500
commit51fd554b6547b74c7e6d1f52885ba8532b531023 (patch)
tree5d9e5a30a3e41fb4e77c2b3f9c2dd1cb33abbcc7 /drivers/i2c/busses/i2c-ite.c
parent36cfb5ccfa39ddd030926d08fcf80ba553c88737 (diff)
i2c: Delete the broken i2c-ite bus driver
The rest of the ITE8172 support was already removed from MIPS tree. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Acked-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'drivers/i2c/busses/i2c-ite.c')
-rw-r--r--drivers/i2c/busses/i2c-ite.c278
1 files changed, 0 insertions, 278 deletions
diff --git a/drivers/i2c/busses/i2c-ite.c b/drivers/i2c/busses/i2c-ite.c
deleted file mode 100644
index f7d71869b3b9..000000000000
--- a/drivers/i2c/busses/i2c-ite.c
+++ /dev/null
@@ -1,278 +0,0 @@
1/*
2 -------------------------------------------------------------------------
3 i2c-adap-ite.c i2c-hw access for the IIC peripheral on the ITE MIPS system
4 -------------------------------------------------------------------------
5 Hai-Pao Fan, MontaVista Software, Inc.
6 hpfan@mvista.com or source@mvista.com
7
8 Copyright 2001 MontaVista Software Inc.
9
10 ----------------------------------------------------------------------------
11 This file was highly leveraged from i2c-elektor.c, which was created
12 by Simon G. Vogl and Hans Berglund:
13
14
15 Copyright (C) 1995-97 Simon G. Vogl
16 1998-99 Hans Berglund
17
18 This program is free software; you can redistribute it and/or modify
19 it under the terms of the GNU General Public License as published by
20 the Free Software Foundation; either version 2 of the License, or
21 (at your option) any later version.
22
23 This program is distributed in the hope that it will be useful,
24 but WITHOUT ANY WARRANTY; without even the implied warranty of
25 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 GNU General Public License for more details.
27
28 You should have received a copy of the GNU General Public License
29 along with this program; if not, write to the Free Software
30 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
31/* ------------------------------------------------------------------------- */
32
33/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
34 Frodo Looijaard <frodol@dds.nl> */
35
36#include <linux/kernel.h>
37#include <linux/ioport.h>
38#include <linux/module.h>
39#include <linux/delay.h>
40#include <linux/slab.h>
41#include <linux/init.h>
42#include <linux/wait.h>
43#include <asm/irq.h>
44#include <asm/io.h>
45
46#include <linux/i2c.h>
47#include <linux/i2c-algo-ite.h>
48#include <linux/i2c-adap-ite.h>
49#include "../i2c-ite.h"
50
51#define DEFAULT_BASE 0x14014030
52#define ITE_IIC_IO_SIZE 0x40
53#define DEFAULT_IRQ 0
54#define DEFAULT_CLOCK 0x1b0e /* default 16MHz/(27+14) = 400KHz */
55#define DEFAULT_OWN 0x55
56
57static int base;
58static int irq;
59static int clock;
60static int own;
61
62static struct iic_ite gpi;
63static wait_queue_head_t iic_wait;
64static int iic_pending;
65static spinlock_t lock;
66
67/* ----- local functions ---------------------------------------------- */
68
69static void iic_ite_setiic(void *data, int ctl, short val)
70{
71 unsigned long j = jiffies + 10;
72
73 pr_debug(" Write 0x%02x to 0x%x\n",(unsigned short)val, ctl&0xff);
74#ifdef DEBUG
75 while (time_before(jiffies, j))
76 schedule();
77#endif
78 outw(val,ctl);
79}
80
81static short iic_ite_getiic(void *data, int ctl)
82{
83 short val;
84
85 val = inw(ctl);
86 pr_debug("Read 0x%02x from 0x%x\n",(unsigned short)val, ctl&0xff);
87 return (val);
88}
89
90/* Return our slave address. This is the address
91 * put on the I2C bus when another master on the bus wants to address us
92 * as a slave
93 */
94static int iic_ite_getown(void *data)
95{
96 return (gpi.iic_own);
97}
98
99
100static int iic_ite_getclock(void *data)
101{
102 return (gpi.iic_clock);
103}
104
105
106/* Put this process to sleep. We will wake up when the
107 * IIC controller interrupts.
108 */
109static void iic_ite_waitforpin(void) {
110 DEFINE_WAIT(wait);
111 int timeout = 2;
112 unsigned long flags;
113
114 /* If interrupts are enabled (which they are), then put the process to
115 * sleep. This process will be awakened by two events -- either the
116 * the IIC peripheral interrupts or the timeout expires.
117 * If interrupts are not enabled then delay for a reasonable amount
118 * of time and return.
119 */
120 if (gpi.iic_irq > 0) {
121 spin_lock_irqsave(&lock, flags);
122 if (iic_pending == 0) {
123 spin_unlock_irqrestore(&lock, flags);
124 prepare_to_wait(&iic_wait, &wait, TASK_INTERRUPTIBLE);
125 if (schedule_timeout(timeout*HZ)) {
126 spin_lock_irqsave(&lock, flags);
127 if (iic_pending == 1) {
128 iic_pending = 0;
129 }
130 spin_unlock_irqrestore(&lock, flags);
131 }
132 finish_wait(&iic_wait, &wait);
133 } else {
134 iic_pending = 0;
135 spin_unlock_irqrestore(&lock, flags);
136 }
137 } else {
138 udelay(100);
139 }
140}
141
142
143static irqreturn_t iic_ite_handler(int this_irq, void *dev_id)
144{
145 spin_lock(&lock);
146 iic_pending = 1;
147 spin_unlock(&lock);
148
149 wake_up_interruptible(&iic_wait);
150
151 return IRQ_HANDLED;
152}
153
154
155/* Lock the region of memory where I/O registers exist. Request our
156 * interrupt line and register its associated handler.
157 */
158static int iic_hw_resrc_init(void)
159{
160 if (!request_region(gpi.iic_base, ITE_IIC_IO_SIZE, "i2c"))
161 return -ENODEV;
162
163 if (gpi.iic_irq <= 0)
164 return 0;
165
166 if (request_irq(gpi.iic_irq, iic_ite_handler, 0, "ITE IIC", 0) < 0)
167 gpi.iic_irq = 0;
168 else
169 enable_irq(gpi.iic_irq);
170
171 return 0;
172}
173
174
175static void iic_ite_release(void)
176{
177 if (gpi.iic_irq > 0) {
178 disable_irq(gpi.iic_irq);
179 free_irq(gpi.iic_irq, 0);
180 }
181 release_region(gpi.iic_base , 2);
182}
183
184/* ------------------------------------------------------------------------
185 * Encapsulate the above functions in the correct operations structure.
186 * This is only done when more than one hardware adapter is supported.
187 */
188static struct i2c_algo_iic_data iic_ite_data = {
189 NULL,
190 iic_ite_setiic,
191 iic_ite_getiic,
192 iic_ite_getown,
193 iic_ite_getclock,
194 iic_ite_waitforpin,
195 80, 80, 100, /* waits, timeout */
196};
197
198static struct i2c_adapter iic_ite_ops = {
199 .owner = THIS_MODULE,
200 .id = I2C_HW_I_IIC,
201 .algo_data = &iic_ite_data,
202 .name = "ITE IIC adapter",
203};
204
205/* Called when the module is loaded. This function starts the
206 * cascade of calls up through the hierarchy of i2c modules (i.e. up to the
207 * algorithm layer and into to the core layer)
208 */
209static int __init iic_ite_init(void)
210{
211
212 struct iic_ite *piic = &gpi;
213
214 printk(KERN_INFO "Initialize ITE IIC adapter module\n");
215 if (base == 0)
216 piic->iic_base = DEFAULT_BASE;
217 else
218 piic->iic_base = base;
219
220 if (irq == 0)
221 piic->iic_irq = DEFAULT_IRQ;
222 else
223 piic->iic_irq = irq;
224
225 if (clock == 0)
226 piic->iic_clock = DEFAULT_CLOCK;
227 else
228 piic->iic_clock = clock;
229
230 if (own == 0)
231 piic->iic_own = DEFAULT_OWN;
232 else
233 piic->iic_own = own;
234
235 iic_ite_data.data = (void *)piic;
236 init_waitqueue_head(&iic_wait);
237 spin_lock_init(&lock);
238 if (iic_hw_resrc_init() == 0) {
239 if (i2c_iic_add_bus(&iic_ite_ops) < 0)
240 return -ENODEV;
241 } else {
242 return -ENODEV;
243 }
244 printk(KERN_INFO " found device at %#x irq %d.\n",
245 piic->iic_base, piic->iic_irq);
246 return 0;
247}
248
249
250static void iic_ite_exit(void)
251{
252 i2c_iic_del_bus(&iic_ite_ops);
253 iic_ite_release();
254}
255
256/* If modules is NOT defined when this file is compiled, then the MODULE_*
257 * macros will resolve to nothing
258 */
259MODULE_AUTHOR("MontaVista Software <www.mvista.com>");
260MODULE_DESCRIPTION("I2C-Bus adapter routines for ITE IIC bus adapter");
261MODULE_LICENSE("GPL");
262
263module_param(base, int, 0);
264module_param(irq, int, 0);
265module_param(clock, int, 0);
266module_param(own, int, 0);
267
268
269/* Called when module is loaded or when kernel is initialized.
270 * If MODULES is defined when this file is compiled, then this function will
271 * resolve to init_module (the function called when insmod is invoked for a
272 * module). Otherwise, this function is called early in the boot, when the
273 * kernel is intialized. Check out /include/init.h to see how this works.
274 */
275module_init(iic_ite_init);
276
277/* Resolves to module_cleanup when MODULES is defined. */
278module_exit(iic_ite_exit);