[ubicom32]: move new files out from platform support patch
[openwrt.git] / target / linux / ubicom32 / files / arch / ubicom32 / mach-ip7k / board-ip7500av.c
1 /*
2  * arch/ubicom32/mach-ip7k/board-ip7500av.c
3  *   Support for IP7500 Audio Video Board + CPU module board.
4  *
5  * This file supports the IP7500 Audio Video Board:
6  *      8007-0810  Rev 1.0
7  * with one of the following CPU module boards:
8  *      8007-0510  Rev 1.0
9  *      8007-0510A Rev 1.0 (with ethernet)
10  *
11  * DIP Switch SW2 configuration: (*) default
12  *      POS 1: on(*) = PCI enabled, off = PCI disabled
13  *      POS 2: on(*) = TTYX => PA6, off = TTYX => PF12
14  *      POS 3: on(*) = TTYY => PA7, off = TTYY => PF15
15  *      POS 4: unused
16  *
17  * (C) Copyright 2009, Ubicom, Inc.
18  *
19  * This file is part of the Ubicom32 Linux Kernel Port.
20  *
21  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
22  * it and/or modify it under the terms of the GNU General Public License
23  * as published by the Free Software Foundation, either version 2 of the
24  * License, or (at your option) any later version.
25  *
26  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
27  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
28  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
29  * the GNU General Public License for more details.
30  *
31  * You should have received a copy of the GNU General Public License
32  * along with the Ubicom32 Linux Kernel Port.  If not,
33  * see <http://www.gnu.org/licenses/>.
34  */
35
36 #include <linux/platform_device.h>
37 #include <linux/device.h>
38 #include <linux/gpio.h>
39 #include <linux/i2c.h>
40 #include <linux/i2c-gpio.h>
41 #include <linux/delay.h>
42 #include <asm/board.h>
43 #include <asm/machdep.h>
44 #include <asm/ring_tio.h>
45 #include <asm/vdc_tio.h>
46 #include <asm/audio.h>
47 #include <asm/ubi32-pcm.h>
48 #include <asm/ubi32-cs4384.h>
49
50 /******************************************************************************
51  * Devices on the I2C bus
52  *
53  * BEWARE of changing the order of things in this array as we depend on
54  * certain things to be in certain places.
55  */
56 static struct i2c_board_info __initdata ip7500av_i2c_board_info[] = {
57         /*
58          * U6, CS4384 DAC, address 0x19
59          */
60         {
61                 .type           = "cs4384",
62                 .addr           = 0x19,
63         },
64 };
65
66 /*
67  * I2C bus on the board, SDA PD1, SCL PD2
68  */
69 static struct i2c_gpio_platform_data ip7500av_i2c_data = {
70         .sda_pin                = GPIO_RD_6,
71         .scl_pin                = GPIO_RD_3,
72         .sda_is_open_drain      = 0,
73         .scl_is_open_drain      = 0,
74         .udelay                 = 50,
75 };
76
77 static struct platform_device ip7500av_i2c_device = {
78         .name   = "i2c-gpio",
79         .id     = 0,
80         .dev    = {
81                 .platform_data = &ip7500av_i2c_data,
82         },
83 };
84
85 /*
86  * List of possible mclks we can generate.  This depends on the CPU frequency.
87  */
88 static struct ubi32_cs4384_mclk_entry ip7500av_cs4384_mclk_entries[] = {
89         {
90                 .rate   =       12288000,
91                 .div    =       44,
92         },
93         {
94                 .rate   =       11289600,
95                 .div    =       48,
96         },
97 };
98
99 /*
100  * List of all devices in our system
101  */
102 static struct platform_device *ip7500av_devices[] __initdata = {
103         &ip7500av_i2c_device,
104 };
105
106 /*
107  * ip7500av_vdac_write
108  */
109 static int __init ip7500av_vdac_write(int reg, int val)
110 {
111         struct i2c_adapter *adap;
112         struct i2c_msg msg[1];
113         unsigned char data[2];
114         int err;
115
116         adap = i2c_get_adapter(0);
117         if (!adap) {
118                 printk(KERN_WARNING "%s: failed to get i2c adapter\n", __FUNCTION__);
119                 return -ENODEV;
120         }
121         msg->addr = 0x2B;
122         msg->flags = 0;
123         msg->len = 2;
124         msg->buf = data;
125         data[0] = reg;
126         data[1] = val;
127         err = i2c_transfer(adap, msg, 1);
128         i2c_put_adapter(adap);
129         if (err >= 0) {
130                 return 0;
131         }
132         return err;
133 }
134
135 /*
136  * ip7500av_vdac_init
137  *      Initializes the video DAC via I2C
138  *
139  * Equivalent mode line: 720x480p = 27 Mhz, 720 736 800 858 480 484 492 525
140  */
141 static int __init ip7500av_vdac_init(void)
142 {
143         int err;
144
145         printk(KERN_INFO "Initializing ADV7393 DAC\n");
146
147         /*
148          * Reset the VDAC
149          */
150         if (gpio_request(GPIO_RF_6, "VDAC Reset")) {
151                 printk(KERN_WARNING "%s: failed to allocate VDAC Reset\n", __FUNCTION__);
152                 return -EBUSY;
153         }
154         gpio_direction_output(GPIO_RF_6, 0);
155         udelay(1);
156         gpio_set_value(GPIO_RF_6, 1);
157
158         /*
159          * See table 100 of ADV7393 data sheet: 16-bit 525p YCrCb In, YPbPr Out
160          */
161         err = ip7500av_vdac_write(0x17, 0x02);
162         if (err) {
163                 printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
164                 return err;
165         }
166         err = ip7500av_vdac_write(0x00, 0x1c);
167         if (err) {
168                 printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
169                 return err;
170         }
171         err = ip7500av_vdac_write(0x01, 0x10);
172         if (err) {
173                 printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
174                 return err;
175         }
176         err = ip7500av_vdac_write(0x31, 0x01);
177         if (err) {
178                 printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
179                 return err;
180         }
181 #ifdef IP7500AV_VDAC_SWAP_PBPR
182         err = ip7500av_vdac_write(0x35, 0x08);
183         if (err) {
184                 printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
185                 return err;
186         }
187 #endif
188 #ifdef IP7500AV_VDAC_FULL_RANGE
189         err = ip7500av_vdac_write(0x30, 0x02);
190         if (err) {
191                 printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
192                 return err;
193         }
194 #endif
195         return 0;
196 }
197 late_initcall(ip7500av_vdac_init);
198
199 /*
200  * ip7500av_init
201  *      Called to add the devices which we have on this board
202  */
203 static int __init ip7500av_init(void)
204 {
205         struct platform_device *audio_dev;
206         struct platform_device *audio_dev2;
207         struct ubi32_cs4384_platform_data *cs4384_pd;
208
209         board_init();
210
211         ubi_gpio_init();
212
213         vdc_tio_init();
214
215         printk(KERN_INFO "%s: registering device resources\n", __FUNCTION__);
216         platform_add_devices(ip7500av_devices, ARRAY_SIZE(ip7500av_devices));
217
218         /*
219          * CS4384 DAC
220          */
221         audio_dev = audio_device_alloc("snd-ubi32-cs4384", "audio", "audio-i2sout",
222                         sizeof(struct ubi32_cs4384_platform_data));
223         if (audio_dev) {
224                 /*
225                  * Attempt to figure out a good divisor.  This will only work
226                  * assuming the core frequency is compatible.
227                  */
228                 int i;
229                 unsigned int freq = processor_frequency();
230                 for (i = 0; i < ARRAY_SIZE(ip7500av_cs4384_mclk_entries); i++) {
231                         unsigned int div;
232                         unsigned int rate = ip7500av_cs4384_mclk_entries[i].rate / 1000;
233                         div = ((freq / rate) + 500) / 1000;
234                         ip7500av_cs4384_mclk_entries[i].div = div;
235                         printk("CS4384 mclk %d rate %u000Hz div %u act %u\n", i, rate, div, freq / div);
236                 }
237
238                 cs4384_pd = audio_device_priv(audio_dev);
239                 cs4384_pd->mclk_src = UBI32_CS4384_MCLK_PWM_0;
240                 cs4384_pd->n_mclk = ARRAY_SIZE(ip7500av_cs4384_mclk_entries);
241                 cs4384_pd->mclk_entries = ip7500av_cs4384_mclk_entries;
242                 ip7500av_i2c_board_info[0].platform_data = audio_dev;
243
244                 /*
245                  * Reset the DAC
246                  */
247                 if (gpio_request(GPIO_RF_4, "DAC Reset") == 0) {
248                         gpio_direction_output(GPIO_RF_4, 0);
249                         udelay(1);
250                         gpio_direction_output(GPIO_RF_4, 1);
251                 } else {
252                         printk("Unable to request DAC reset GPIO\n");
253                 }
254         }
255
256         /*
257          * SPDIF port
258          */
259         audio_dev2 = audio_device_alloc("snd-ubi32-generic", "audio", "audio-spdifout", 0);
260         if (audio_dev2) {
261                 platform_device_register(audio_dev2);
262         }
263
264         /*
265          * Register all of the devices which sit on the I2C bus
266          */
267         printk(KERN_INFO "%s: registering i2c resources\n", __FUNCTION__);
268         i2c_register_board_info(0, ip7500av_i2c_board_info, ARRAY_SIZE(ip7500av_i2c_board_info));
269
270         printk(KERN_INFO "IP7500 Audio/Video Board\n");
271         return 0;
272 }
273 arch_initcall(ip7500av_init);