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1/*
2 * Copyright 2012 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
18 * USE OR OTHER DEALINGS IN THE SOFTWARE.
19 *
20 * The above copyright notice and this permission notice (including the
21 * next paragraph) shall be included in all copies or substantial portions
22 * of the Software.
23 *
24 */
25/*
26 * Authors: Dave Airlie <airlied@redhat.com>
27 */
28
29#include <linux/export.h>
30#include <linux/i2c-algo-bit.h>
31#include <linux/i2c.h>
32
33#include <drm/drm_pci.h>
34
35#include "mgag200_drv.h"
36
37static int mga_i2c_read_gpio(struct mga_device *mdev)
38{
39 WREG8(DAC_INDEX, MGA1064_GEN_IO_DATA);
40 return RREG8(DAC_DATA);
41}
42
43static void mga_i2c_set_gpio(struct mga_device *mdev, int mask, int val)
44{
45 int tmp;
46
47 WREG8(DAC_INDEX, MGA1064_GEN_IO_CTL);
48 tmp = (RREG8(DAC_DATA) & mask) | val;
49 WREG_DAC(MGA1064_GEN_IO_CTL, tmp);
50 WREG_DAC(MGA1064_GEN_IO_DATA, 0);
51}
52
53static inline void mga_i2c_set(struct mga_device *mdev, int mask, int state)
54{
55 if (state)
56 state = 0;
57 else
58 state = mask;
59 mga_i2c_set_gpio(mdev, ~mask, state);
60}
61
62static void mga_gpio_setsda(void *data, int state)
63{
64 struct mga_i2c_chan *i2c = data;
65 struct mga_device *mdev = i2c->dev->dev_private;
66 mga_i2c_set(mdev, i2c->data, state);
67}
68
69static void mga_gpio_setscl(void *data, int state)
70{
71 struct mga_i2c_chan *i2c = data;
72 struct mga_device *mdev = i2c->dev->dev_private;
73 mga_i2c_set(mdev, i2c->clock, state);
74}
75
76static int mga_gpio_getsda(void *data)
77{
78 struct mga_i2c_chan *i2c = data;
79 struct mga_device *mdev = i2c->dev->dev_private;
80 return (mga_i2c_read_gpio(mdev) & i2c->data) ? 1 : 0;
81}
82
83static int mga_gpio_getscl(void *data)
84{
85 struct mga_i2c_chan *i2c = data;
86 struct mga_device *mdev = i2c->dev->dev_private;
87 return (mga_i2c_read_gpio(mdev) & i2c->clock) ? 1 : 0;
88}
89
90struct mga_i2c_chan *mgag200_i2c_create(struct drm_device *dev)
91{
92 struct mga_device *mdev = dev->dev_private;
93 struct mga_i2c_chan *i2c;
94 int ret;
95 int data, clock;
96
97 WREG_DAC(MGA1064_GEN_IO_CTL2, 1);
98 WREG_DAC(MGA1064_GEN_IO_DATA, 0xff);
99 WREG_DAC(MGA1064_GEN_IO_CTL, 0);
100
101 switch (mdev->type) {
102 case G200_SE_A:
103 case G200_SE_B:
104 case G200_EV:
105 case G200_WB:
106 case G200_EW3:
107 data = 1;
108 clock = 2;
109 break;
110 case G200_EH:
111 case G200_EH3:
112 case G200_ER:
113 data = 2;
114 clock = 1;
115 break;
116 default:
117 data = 2;
118 clock = 8;
119 break;
120 }
121
122 i2c = kzalloc(sizeof(struct mga_i2c_chan), GFP_KERNEL);
123 if (!i2c)
124 return NULL;
125
126 i2c->data = data;
127 i2c->clock = clock;
128 i2c->adapter.owner = THIS_MODULE;
129 i2c->adapter.class = I2C_CLASS_DDC;
130 i2c->adapter.dev.parent = &dev->pdev->dev;
131 i2c->dev = dev;
132 i2c_set_adapdata(&i2c->adapter, i2c);
133 snprintf(i2c->adapter.name, sizeof(i2c->adapter.name), "mga i2c");
134
135 i2c->adapter.algo_data = &i2c->bit;
136
137 i2c->bit.udelay = 10;
138 i2c->bit.timeout = 2;
139 i2c->bit.data = i2c;
140 i2c->bit.setsda = mga_gpio_setsda;
141 i2c->bit.setscl = mga_gpio_setscl;
142 i2c->bit.getsda = mga_gpio_getsda;
143 i2c->bit.getscl = mga_gpio_getscl;
144
145 ret = i2c_bit_add_bus(&i2c->adapter);
146 if (ret) {
147 kfree(i2c);
148 i2c = NULL;
149 }
150 return i2c;
151}
152
153void mgag200_i2c_destroy(struct mga_i2c_chan *i2c)
154{
155 if (!i2c)
156 return;
157 i2c_del_adapter(&i2c->adapter);
158 kfree(i2c);
159}
160
1/*
2 * Copyright 2012 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
18 * USE OR OTHER DEALINGS IN THE SOFTWARE.
19 *
20 * The above copyright notice and this permission notice (including the
21 * next paragraph) shall be included in all copies or substantial portions
22 * of the Software.
23 *
24 */
25/*
26 * Authors: Dave Airlie <airlied@redhat.com>
27 */
28#include <linux/export.h>
29#include <linux/i2c.h>
30#include <linux/i2c-algo-bit.h>
31#include <drm/drmP.h>
32
33#include "mgag200_drv.h"
34
35static int mga_i2c_read_gpio(struct mga_device *mdev)
36{
37 WREG8(DAC_INDEX, MGA1064_GEN_IO_DATA);
38 return RREG8(DAC_DATA);
39}
40
41static void mga_i2c_set_gpio(struct mga_device *mdev, int mask, int val)
42{
43 int tmp;
44
45 WREG8(DAC_INDEX, MGA1064_GEN_IO_CTL);
46 tmp = (RREG8(DAC_DATA) & mask) | val;
47 WREG_DAC(MGA1064_GEN_IO_CTL, tmp);
48 WREG_DAC(MGA1064_GEN_IO_DATA, 0);
49}
50
51static inline void mga_i2c_set(struct mga_device *mdev, int mask, int state)
52{
53 if (state)
54 state = 0;
55 else
56 state = mask;
57 mga_i2c_set_gpio(mdev, ~mask, state);
58}
59
60static void mga_gpio_setsda(void *data, int state)
61{
62 struct mga_i2c_chan *i2c = data;
63 struct mga_device *mdev = i2c->dev->dev_private;
64 mga_i2c_set(mdev, i2c->data, state);
65}
66
67static void mga_gpio_setscl(void *data, int state)
68{
69 struct mga_i2c_chan *i2c = data;
70 struct mga_device *mdev = i2c->dev->dev_private;
71 mga_i2c_set(mdev, i2c->clock, state);
72}
73
74static int mga_gpio_getsda(void *data)
75{
76 struct mga_i2c_chan *i2c = data;
77 struct mga_device *mdev = i2c->dev->dev_private;
78 return (mga_i2c_read_gpio(mdev) & i2c->data) ? 1 : 0;
79}
80
81static int mga_gpio_getscl(void *data)
82{
83 struct mga_i2c_chan *i2c = data;
84 struct mga_device *mdev = i2c->dev->dev_private;
85 return (mga_i2c_read_gpio(mdev) & i2c->clock) ? 1 : 0;
86}
87
88struct mga_i2c_chan *mgag200_i2c_create(struct drm_device *dev)
89{
90 struct mga_device *mdev = dev->dev_private;
91 struct mga_i2c_chan *i2c;
92 int ret;
93 int data, clock;
94
95 WREG_DAC(MGA1064_GEN_IO_CTL2, 1);
96 WREG_DAC(MGA1064_GEN_IO_DATA, 0xff);
97 WREG_DAC(MGA1064_GEN_IO_CTL, 0);
98
99 switch (mdev->type) {
100 case G200_SE_A:
101 case G200_SE_B:
102 case G200_EV:
103 case G200_WB:
104 case G200_EW3:
105 data = 1;
106 clock = 2;
107 break;
108 case G200_EH:
109 case G200_ER:
110 data = 2;
111 clock = 1;
112 break;
113 default:
114 data = 2;
115 clock = 8;
116 break;
117 }
118
119 i2c = kzalloc(sizeof(struct mga_i2c_chan), GFP_KERNEL);
120 if (!i2c)
121 return NULL;
122
123 i2c->data = data;
124 i2c->clock = clock;
125 i2c->adapter.owner = THIS_MODULE;
126 i2c->adapter.class = I2C_CLASS_DDC;
127 i2c->adapter.dev.parent = &dev->pdev->dev;
128 i2c->dev = dev;
129 i2c_set_adapdata(&i2c->adapter, i2c);
130 snprintf(i2c->adapter.name, sizeof(i2c->adapter.name), "mga i2c");
131
132 i2c->adapter.algo_data = &i2c->bit;
133
134 i2c->bit.udelay = 10;
135 i2c->bit.timeout = 2;
136 i2c->bit.data = i2c;
137 i2c->bit.setsda = mga_gpio_setsda;
138 i2c->bit.setscl = mga_gpio_setscl;
139 i2c->bit.getsda = mga_gpio_getsda;
140 i2c->bit.getscl = mga_gpio_getscl;
141
142 ret = i2c_bit_add_bus(&i2c->adapter);
143 if (ret) {
144 kfree(i2c);
145 i2c = NULL;
146 }
147 return i2c;
148}
149
150void mgag200_i2c_destroy(struct mga_i2c_chan *i2c)
151{
152 if (!i2c)
153 return;
154 i2c_del_adapter(&i2c->adapter);
155 kfree(i2c);
156}
157