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authorJean Delvare <khali@linux-fr.org>2009-04-06 12:12:25 -0400
committerJean Delvare <khali@linux-fr.org>2009-04-06 12:12:25 -0400
commitabe213d7f6fb87f48f4324320733f666db1bc11b (patch)
treec4666bf63f34cdfe3f97e5a80cebd5c2eb5b5119 /drivers/i2c/algos
parent7c8ad4aff0699197469327d0e50d1e48f2ccb39b (diff)
i2c: Delete unused i2c-algo-sgi helper module
The i2c-algo-sgi code was merged into the vino driver, so we can delete it now. Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c/algos')
-rw-r--r--drivers/i2c/algos/Kconfig4
-rw-r--r--drivers/i2c/algos/Makefile1
-rw-r--r--drivers/i2c/algos/i2c-algo-sgi.c179
3 files changed, 0 insertions, 184 deletions
diff --git a/drivers/i2c/algos/Kconfig b/drivers/i2c/algos/Kconfig
index b788579b8227..7b2ce4a08524 100644
--- a/drivers/i2c/algos/Kconfig
+++ b/drivers/i2c/algos/Kconfig
@@ -14,8 +14,4 @@ config I2C_ALGOPCF
14config I2C_ALGOPCA 14config I2C_ALGOPCA
15 tristate "I2C PCA 9564 interfaces" 15 tristate "I2C PCA 9564 interfaces"
16 16
17config I2C_ALGO_SGI
18 tristate
19 depends on SGI_IP22 || SGI_IP32 || X86_VISWS
20
21endmenu 17endmenu
diff --git a/drivers/i2c/algos/Makefile b/drivers/i2c/algos/Makefile
index cac1051bd4f1..18b3e962ec09 100644
--- a/drivers/i2c/algos/Makefile
+++ b/drivers/i2c/algos/Makefile
@@ -5,7 +5,6 @@
5obj-$(CONFIG_I2C_ALGOBIT) += i2c-algo-bit.o 5obj-$(CONFIG_I2C_ALGOBIT) += i2c-algo-bit.o
6obj-$(CONFIG_I2C_ALGOPCF) += i2c-algo-pcf.o 6obj-$(CONFIG_I2C_ALGOPCF) += i2c-algo-pcf.o
7obj-$(CONFIG_I2C_ALGOPCA) += i2c-algo-pca.o 7obj-$(CONFIG_I2C_ALGOPCA) += i2c-algo-pca.o
8obj-$(CONFIG_I2C_ALGO_SGI) += i2c-algo-sgi.o
9 8
10ifeq ($(CONFIG_I2C_DEBUG_ALGO),y) 9ifeq ($(CONFIG_I2C_DEBUG_ALGO),y)
11EXTRA_CFLAGS += -DDEBUG 10EXTRA_CFLAGS += -DDEBUG
diff --git a/drivers/i2c/algos/i2c-algo-sgi.c b/drivers/i2c/algos/i2c-algo-sgi.c
deleted file mode 100644
index 6eaf145e1ada..000000000000
--- a/drivers/i2c/algos/i2c-algo-sgi.c
+++ /dev/null
@@ -1,179 +0,0 @@
1/*
2 * i2c-algo-sgi.c: i2c driver algorithm used by the VINO (SGI Indy) and
3 * MACE (SGI O2) chips.
4 *
5 * This file is subject to the terms and conditions of the GNU General Public
6 * License version 2 as published by the Free Software Foundation.
7 *
8 * Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org>
9 */
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/errno.h>
15#include <linux/delay.h>
16
17#include <linux/i2c.h>
18#include <linux/i2c-algo-sgi.h>
19
20
21#define SGI_I2C_FORCE_IDLE (0 << 0)
22#define SGI_I2C_NOT_IDLE (1 << 0)
23#define SGI_I2C_WRITE (0 << 1)
24#define SGI_I2C_READ (1 << 1)
25#define SGI_I2C_RELEASE_BUS (0 << 2)
26#define SGI_I2C_HOLD_BUS (1 << 2)
27#define SGI_I2C_XFER_DONE (0 << 4)
28#define SGI_I2C_XFER_BUSY (1 << 4)
29#define SGI_I2C_ACK (0 << 5)
30#define SGI_I2C_NACK (1 << 5)
31#define SGI_I2C_BUS_OK (0 << 7)
32#define SGI_I2C_BUS_ERR (1 << 7)
33
34#define get_control() adap->getctrl(adap->data)
35#define set_control(val) adap->setctrl(adap->data, val)
36#define read_data() adap->rdata(adap->data)
37#define write_data(val) adap->wdata(adap->data, val)
38
39
40static int wait_xfer_done(struct i2c_algo_sgi_data *adap)
41{
42 int i;
43
44 for (i = 0; i < adap->xfer_timeout; i++) {
45 if ((get_control() & SGI_I2C_XFER_BUSY) == 0)
46 return 0;
47 udelay(1);
48 }
49
50 return -ETIMEDOUT;
51}
52
53static int wait_ack(struct i2c_algo_sgi_data *adap)
54{
55 int i;
56
57 if (wait_xfer_done(adap))
58 return -ETIMEDOUT;
59 for (i = 0; i < adap->ack_timeout; i++) {
60 if ((get_control() & SGI_I2C_NACK) == 0)
61 return 0;
62 udelay(1);
63 }
64
65 return -ETIMEDOUT;
66}
67
68static int force_idle(struct i2c_algo_sgi_data *adap)
69{
70 int i;
71
72 set_control(SGI_I2C_FORCE_IDLE);
73 for (i = 0; i < adap->xfer_timeout; i++) {
74 if ((get_control() & SGI_I2C_NOT_IDLE) == 0)
75 goto out;
76 udelay(1);
77 }
78 return -ETIMEDOUT;
79out:
80 if (get_control() & SGI_I2C_BUS_ERR)
81 return -EIO;
82 return 0;
83}
84
85static int do_address(struct i2c_algo_sgi_data *adap, unsigned int addr,
86 int rd)
87{
88 if (rd)
89 set_control(SGI_I2C_NOT_IDLE);
90 /* Check if bus is idle, eventually force it to do so */
91 if (get_control() & SGI_I2C_NOT_IDLE)
92 if (force_idle(adap))
93 return -EIO;
94 /* Write out the i2c chip address and specify operation */
95 set_control(SGI_I2C_HOLD_BUS | SGI_I2C_WRITE | SGI_I2C_NOT_IDLE);
96 if (rd)
97 addr |= 1;
98 write_data(addr);
99 if (wait_ack(adap))
100 return -EIO;
101 return 0;
102}
103
104static int i2c_read(struct i2c_algo_sgi_data *adap, unsigned char *buf,
105 unsigned int len)
106{
107 int i;
108
109 set_control(SGI_I2C_HOLD_BUS | SGI_I2C_READ | SGI_I2C_NOT_IDLE);
110 for (i = 0; i < len; i++) {
111 if (wait_xfer_done(adap))
112 return -EIO;
113 buf[i] = read_data();
114 }
115 set_control(SGI_I2C_RELEASE_BUS | SGI_I2C_FORCE_IDLE);
116
117 return 0;
118
119}
120
121static int i2c_write(struct i2c_algo_sgi_data *adap, unsigned char *buf,
122 unsigned int len)
123{
124 int i;
125
126 /* We are already in write state */
127 for (i = 0; i < len; i++) {
128 write_data(buf[i]);
129 if (wait_ack(adap))
130 return -EIO;
131 }
132 return 0;
133}
134
135static int sgi_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs,
136 int num)
137{
138 struct i2c_algo_sgi_data *adap = i2c_adap->algo_data;
139 struct i2c_msg *p;
140 int i, err = 0;
141
142 for (i = 0; !err && i < num; i++) {
143 p = &msgs[i];
144 err = do_address(adap, p->addr, p->flags & I2C_M_RD);
145 if (err || !p->len)
146 continue;
147 if (p->flags & I2C_M_RD)
148 err = i2c_read(adap, p->buf, p->len);
149 else
150 err = i2c_write(adap, p->buf, p->len);
151 }
152
153 return (err < 0) ? err : i;
154}
155
156static u32 sgi_func(struct i2c_adapter *adap)
157{
158 return I2C_FUNC_SMBUS_EMUL;
159}
160
161static const struct i2c_algorithm sgi_algo = {
162 .master_xfer = sgi_xfer,
163 .functionality = sgi_func,
164};
165
166/*
167 * registering functions to load algorithms at runtime
168 */
169int i2c_sgi_add_bus(struct i2c_adapter *adap)
170{
171 adap->algo = &sgi_algo;
172
173 return i2c_add_adapter(adap);
174}
175EXPORT_SYMBOL(i2c_sgi_add_bus);
176
177MODULE_AUTHOR("Ladislav Michl <ladis@linux-mips.org>");
178MODULE_DESCRIPTION("I2C-Bus SGI algorithm");
179MODULE_LICENSE("GPL");