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-rw-r--r--drivers/i2c/busses/i2c-prosavage.c325
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diff --git a/drivers/i2c/busses/i2c-prosavage.c b/drivers/i2c/busses/i2c-prosavage.c
deleted file mode 100644
index 07c1f1e27df1..000000000000
--- a/drivers/i2c/busses/i2c-prosavage.c
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@@ -1,325 +0,0 @@
1/*
2 * kernel/busses/i2c-prosavage.c
3 *
4 * i2c bus driver for S3/VIA 8365/8375 graphics processor.
5 * Copyright (c) 2003 Henk Vergonet <henk@god.dyndns.org>
6 * Based on code written by:
7 * Frodo Looijaard <frodol@dds.nl>,
8 * Philip Edelbrock <phil@netroedge.com>,
9 * Ralph Metzler <rjkm@thp.uni-koeln.de>, and
10 * Mark D. Studebaker <mdsxyz123@yahoo.com>
11 * Simon Vogl
12 * and others
13 *
14 * Please read the lm_sensors documentation for details on use.
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 *
30 */
31/* 18-05-2003 HVE - created
32 * 14-06-2003 HVE - adapted for lm_sensors2
33 * 17-06-2003 HVE - linux 2.5.xx compatible
34 * 18-06-2003 HVE - codingstyle
35 * 21-06-2003 HVE - compatibility lm_sensors2 and linux 2.5.xx
36 * codingstyle, mmio enabled
37 *
38 * This driver interfaces to the I2C bus of the VIA north bridge embedded
39 * ProSavage4/8 devices. Usefull for gaining access to the TV Encoder chips.
40 *
41 * Graphics cores:
42 * S3/VIA KM266/VT8375 aka ProSavage8
43 * S3/VIA KM133/VT8365 aka Savage4
44 *
45 * Two serial busses are implemented:
46 * SERIAL1 - I2C serial communications interface
47 * SERIAL2 - DDC2 monitor communications interface
48 *
49 * Tested on a FX41 mainboard, see http://www.shuttle.com
50 *
51 *
52 * TODO:
53 * - integration with prosavage framebuffer device
54 * (Additional documentation needed :(
55 */
56
57#include <linux/module.h>
58#include <linux/init.h>
59#include <linux/pci.h>
60#include <linux/i2c.h>
61#include <linux/i2c-algo-bit.h>
62#include <asm/io.h>
63
64/*
65 * driver configuration
66 */
67#define MAX_BUSSES 2
68
69struct s_i2c_bus {
70 void __iomem *mmvga;
71 int i2c_reg;
72 int adap_ok;
73 struct i2c_adapter adap;
74 struct i2c_algo_bit_data algo;
75};
76
77struct s_i2c_chip {
78 void __iomem *mmio;
79 struct s_i2c_bus i2c_bus[MAX_BUSSES];
80};
81
82
83/*
84 * i2c configuration
85 */
86#define CYCLE_DELAY 10
87#define TIMEOUT (HZ / 2)
88
89
90/*
91 * S3/VIA 8365/8375 registers
92 */
93#define VGA_CR_IX 0x3d4
94#define VGA_CR_DATA 0x3d5
95
96#define CR_SERIAL1 0xa0 /* I2C serial communications interface */
97#define MM_SERIAL1 0xff20
98#define CR_SERIAL2 0xb1 /* DDC2 monitor communications interface */
99
100/* based on vt8365 documentation */
101#define I2C_ENAB 0x10
102#define I2C_SCL_OUT 0x01
103#define I2C_SDA_OUT 0x02
104#define I2C_SCL_IN 0x04
105#define I2C_SDA_IN 0x08
106
107#define SET_CR_IX(p, val) writeb((val), (p)->mmvga + VGA_CR_IX)
108#define SET_CR_DATA(p, val) writeb((val), (p)->mmvga + VGA_CR_DATA)
109#define GET_CR_DATA(p) readb((p)->mmvga + VGA_CR_DATA)
110
111
112/*
113 * Serial bus line handling
114 *
115 * serial communications register as parameter in private data
116 *
117 * TODO: locks with other code sections accessing video registers?
118 */
119static void bit_s3via_setscl(void *bus, int val)
120{
121 struct s_i2c_bus *p = (struct s_i2c_bus *)bus;
122 unsigned int r;
123
124 SET_CR_IX(p, p->i2c_reg);
125 r = GET_CR_DATA(p);
126 r |= I2C_ENAB;
127 if (val) {
128 r |= I2C_SCL_OUT;
129 } else {
130 r &= ~I2C_SCL_OUT;
131 }
132 SET_CR_DATA(p, r);
133}
134
135static void bit_s3via_setsda(void *bus, int val)
136{
137 struct s_i2c_bus *p = (struct s_i2c_bus *)bus;
138 unsigned int r;
139
140 SET_CR_IX(p, p->i2c_reg);
141 r = GET_CR_DATA(p);
142 r |= I2C_ENAB;
143 if (val) {
144 r |= I2C_SDA_OUT;
145 } else {
146 r &= ~I2C_SDA_OUT;
147 }
148 SET_CR_DATA(p, r);
149}
150
151static int bit_s3via_getscl(void *bus)
152{
153 struct s_i2c_bus *p = (struct s_i2c_bus *)bus;
154
155 SET_CR_IX(p, p->i2c_reg);
156 return (0 != (GET_CR_DATA(p) & I2C_SCL_IN));
157}
158
159static int bit_s3via_getsda(void *bus)
160{
161 struct s_i2c_bus *p = (struct s_i2c_bus *)bus;
162
163 SET_CR_IX(p, p->i2c_reg);
164 return (0 != (GET_CR_DATA(p) & I2C_SDA_IN));
165}
166
167
168/*
169 * adapter initialisation
170 */
171static int i2c_register_bus(struct pci_dev *dev, struct s_i2c_bus *p, void __iomem *mmvga, u32 i2c_reg)
172{
173 int ret;
174 p->adap.owner = THIS_MODULE;
175 p->adap.id = I2C_HW_B_S3VIA;
176 p->adap.algo_data = &p->algo;
177 p->adap.dev.parent = &dev->dev;
178 p->algo.setsda = bit_s3via_setsda;
179 p->algo.setscl = bit_s3via_setscl;
180 p->algo.getsda = bit_s3via_getsda;
181 p->algo.getscl = bit_s3via_getscl;
182 p->algo.udelay = CYCLE_DELAY;
183 p->algo.timeout = TIMEOUT;
184 p->algo.data = p;
185 p->mmvga = mmvga;
186 p->i2c_reg = i2c_reg;
187
188 ret = i2c_bit_add_bus(&p->adap);
189 if (ret) {
190 return ret;
191 }
192
193 p->adap_ok = 1;
194 return 0;
195}
196
197
198/*
199 * Cleanup stuff
200 */
201static void prosavage_remove(struct pci_dev *dev)
202{
203 struct s_i2c_chip *chip;
204 int i, ret;
205
206 chip = (struct s_i2c_chip *)pci_get_drvdata(dev);
207
208 if (!chip) {
209 return;
210 }
211 for (i = MAX_BUSSES - 1; i >= 0; i--) {
212 if (chip->i2c_bus[i].adap_ok == 0)
213 continue;
214
215 ret = i2c_del_adapter(&chip->i2c_bus[i].adap);
216 if (ret) {
217 dev_err(&dev->dev, "%s not removed\n",
218 chip->i2c_bus[i].adap.name);
219 }
220 }
221 if (chip->mmio) {
222 iounmap(chip->mmio);
223 }
224 kfree(chip);
225}
226
227
228/*
229 * Detect chip and initialize it
230 */
231static int __devinit prosavage_probe(struct pci_dev *dev, const struct pci_device_id *id)
232{
233 int ret;
234 unsigned long base, len;
235 struct s_i2c_chip *chip;
236 struct s_i2c_bus *bus;
237
238 pci_set_drvdata(dev, kzalloc(sizeof(struct s_i2c_chip), GFP_KERNEL));
239 chip = (struct s_i2c_chip *)pci_get_drvdata(dev);
240 if (chip == NULL) {
241 return -ENOMEM;
242 }
243
244 base = dev->resource[0].start & PCI_BASE_ADDRESS_MEM_MASK;
245 len = dev->resource[0].end - base + 1;
246 chip->mmio = ioremap_nocache(base, len);
247
248 if (chip->mmio == NULL) {
249 dev_err(&dev->dev, "ioremap failed\n");
250 prosavage_remove(dev);
251 return -ENODEV;
252 }
253
254
255 /*
256 * Chip initialisation
257 */
258 /* Unlock Extended IO Space ??? */
259
260
261 /*
262 * i2c bus registration
263 */
264 bus = &chip->i2c_bus[0];
265 snprintf(bus->adap.name, sizeof(bus->adap.name),
266 "ProSavage I2C bus at %02x:%02x.%x",
267 dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
268 ret = i2c_register_bus(dev, bus, chip->mmio + 0x8000, CR_SERIAL1);
269 if (ret) {
270 goto err_adap;
271 }
272 /*
273 * ddc bus registration
274 */
275 bus = &chip->i2c_bus[1];
276 snprintf(bus->adap.name, sizeof(bus->adap.name),
277 "ProSavage DDC bus at %02x:%02x.%x",
278 dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
279 ret = i2c_register_bus(dev, bus, chip->mmio + 0x8000, CR_SERIAL2);
280 if (ret) {
281 goto err_adap;
282 }
283 return 0;
284err_adap:
285 dev_err(&dev->dev, "%s failed\n", bus->adap.name);
286 prosavage_remove(dev);
287 return ret;
288}
289
290
291/*
292 * Data for PCI driver interface
293 */
294static struct pci_device_id prosavage_pci_tbl[] = {
295 { PCI_DEVICE(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_SAVAGE4) },
296 { PCI_DEVICE(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_PROSAVAGE8) },
297 { 0, },
298};
299
300MODULE_DEVICE_TABLE (pci, prosavage_pci_tbl);
301
302static struct pci_driver prosavage_driver = {
303 .name = "prosavage_smbus",
304 .id_table = prosavage_pci_tbl,
305 .probe = prosavage_probe,
306 .remove = prosavage_remove,
307};
308
309static int __init i2c_prosavage_init(void)
310{
311 return pci_register_driver(&prosavage_driver);
312}
313
314static void __exit i2c_prosavage_exit(void)
315{
316 pci_unregister_driver(&prosavage_driver);
317}
318
319MODULE_DEVICE_TABLE(pci, prosavage_pci_tbl);
320MODULE_AUTHOR("Henk Vergonet");
321MODULE_DESCRIPTION("ProSavage VIA 8365/8375 smbus driver");
322MODULE_LICENSE("GPL");
323
324module_init (i2c_prosavage_init);
325module_exit (i2c_prosavage_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-26 09:07:23 -0500