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BeagleBoard: Added LED driver
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1 /*
2  * (C) Copyright 2004-2008
3  * Texas Instruments, <www.ti.com>
4  *
5  * Author :
6  *      Sunil Kumar <sunilsaini05@gmail.com>
7  *      Shashi Ranjan <shashiranjanmca05@gmail.com>
8  *
9  * Derived from Beagle Board and 3430 SDP code by
10  *      Richard Woodruff <r-woodruff2@ti.com>
11  *      Syed Mohammed Khasim <khasim@ti.com>
12  *
13  *
14  * See file CREDITS for list of people who contributed to this
15  * project.
16  *
17  * This program is free software; you can redistribute it and/or
18  * modify it under the terms of the GNU General Public License as
19  * published by the Free Software Foundation; either version 2 of
20  * the License, or (at your option) any later version.
21  *
22  * This program is distributed in the hope that it will be useful,
23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25  * GNU General Public License for more details.
26  *
27  * You should have received a copy of the GNU General Public License
28  * along with this program; if not, write to the Free Software
29  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30  * MA 02111-1307 USA
31  */
32 #include <common.h>
33 #ifdef CONFIG_STATUS_LED
34 #include <status_led.h>
35 #endif
36 #include <twl4030.h>
37 #include <asm/io.h>
38 #include <asm/arch/mmc_host_def.h>
39 #include <asm/arch/mux.h>
40 #include <asm/arch/sys_proto.h>
41 #include <asm/arch/gpio.h>
42 #include <asm/mach-types.h>
43 #include "beagle.h"
44
45 #define TWL4030_I2C_BUS                 0
46 #define EXPANSION_EEPROM_I2C_BUS        1
47 #define EXPANSION_EEPROM_I2C_ADDRESS    0x50
48
49 #define TINCANTOOLS_ZIPPY               0x01000100
50 #define TINCANTOOLS_ZIPPY2              0x02000100
51 #define TINCANTOOLS_TRAINER             0x04000100
52 #define TINCANTOOLS_SHOWDOG             0x03000100
53 #define KBADC_BEAGLEFPGA                0x01000600
54
55 #define BEAGLE_NO_EEPROM                0xffffffff
56
57 DECLARE_GLOBAL_DATA_PTR;
58
59 static struct {
60         unsigned int device_vendor;
61         unsigned char revision;
62         unsigned char content;
63         char fab_revision[8];
64         char env_var[16];
65         char env_setting[64];
66 } expansion_config;
67
68 /*
69  * Routine: board_init
70  * Description: Early hardware init.
71  */
72 int board_init(void)
73 {
74         gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
75         /* board id for Linux */
76         gd->bd->bi_arch_number = MACH_TYPE_OMAP3_BEAGLE;
77         /* boot param addr */
78         gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
79
80 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
81         status_led_set (STATUS_LED_BOOT, STATUS_LED_ON);
82 #endif
83
84         return 0;
85 }
86
87 /*
88  * Routine: get_board_revision
89  * Description: Detect if we are running on a Beagle revision Ax/Bx,
90  *              C1/2/3, C4 or xM. This can be done by reading
91  *              the level of GPIO173, GPIO172 and GPIO171. This should
92  *              result in
93  *              GPIO173, GPIO172, GPIO171: 1 1 1 => Ax/Bx
94  *              GPIO173, GPIO172, GPIO171: 1 1 0 => C1/2/3
95  *              GPIO173, GPIO172, GPIO171: 1 0 1 => C4
96  *              GPIO173, GPIO172, GPIO171: 0 0 0 => xM
97  */
98 int get_board_revision(void)
99 {
100         int revision;
101
102         if (!omap_request_gpio(171) &&
103             !omap_request_gpio(172) &&
104             !omap_request_gpio(173)) {
105
106                 omap_set_gpio_direction(171, 1);
107                 omap_set_gpio_direction(172, 1);
108                 omap_set_gpio_direction(173, 1);
109
110                 revision = omap_get_gpio_datain(173) << 2 |
111                            omap_get_gpio_datain(172) << 1 |
112                            omap_get_gpio_datain(171);
113
114                 omap_free_gpio(171);
115                 omap_free_gpio(172);
116                 omap_free_gpio(173);
117         } else {
118                 printf("Error: unable to acquire board revision GPIOs\n");
119                 revision = -1;
120         }
121
122         return revision;
123 }
124
125 /*
126  * Routine: get_expansion_id
127  * Description: This function checks for expansion board by checking I2C
128  *              bus 1 for the availability of an AT24C01B serial EEPROM.
129  *              returns the device_vendor field from the EEPROM
130  */
131 unsigned int get_expansion_id(void)
132 {
133         i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS);
134
135         /* return BEAGLE_NO_EEPROM if eeprom doesn't respond */
136         if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) {
137                 i2c_set_bus_num(TWL4030_I2C_BUS);
138                 return BEAGLE_NO_EEPROM;
139         }
140
141         /* read configuration data */
142         i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config,
143                  sizeof(expansion_config));
144
145         i2c_set_bus_num(TWL4030_I2C_BUS);
146
147         return expansion_config.device_vendor;
148 }
149
150 /*
151  * Routine: misc_init_r
152  * Description: Configure board specific parts
153  */
154 int misc_init_r(void)
155 {
156         struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE;
157         struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
158
159         switch (get_board_revision()) {
160         case REVISION_AXBX:
161                 printf("Beagle Rev Ax/Bx\n");
162                 setenv("beaglerev", "AxBx");
163                 setenv("mpurate", "600");
164                 break;
165         case REVISION_CX:
166                 printf("Beagle Rev C1/C2/C3\n");
167                 setenv("beaglerev", "Cx");
168                 setenv("mpurate", "600");
169                 MUX_BEAGLE_C();
170                 break;
171         case REVISION_C4:
172                 printf("Beagle Rev C4\n");
173                 setenv("beaglerev", "C4");
174                 setenv("mpurate", "720");
175                 MUX_BEAGLE_C();
176                 /* Set VAUX2 to 1.8V for EHCI PHY */
177                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
178                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
179                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
180                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
181                 break;
182         case REVISION_XM:
183                 printf("Beagle xM Rev A\n");
184                 setenv("beaglerev", "xMA");
185                 setenv("mpurate", "1000");
186                 MUX_BEAGLE_XM();
187                 /* Set VAUX2 to 1.8V for EHCI PHY */
188                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
189                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
190                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
191                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
192                 break;
193         default:
194                 printf("Beagle unknown 0x%02x\n", get_board_revision());
195         }
196
197         switch (get_expansion_id()) {
198         case TINCANTOOLS_ZIPPY:
199                 printf("Recognized Tincantools Zippy board (rev %d %s)\n",
200                         expansion_config.revision,
201                         expansion_config.fab_revision);
202                 MUX_TINCANTOOLS_ZIPPY();
203                 setenv("buddy", "zippy");
204                 break;
205         case TINCANTOOLS_ZIPPY2:
206                 printf("Recognized Tincantools Zippy2 board (rev %d %s)\n",
207                         expansion_config.revision,
208                         expansion_config.fab_revision);
209                 MUX_TINCANTOOLS_ZIPPY();
210                 setenv("buddy", "zippy2");
211                 break;
212         case TINCANTOOLS_TRAINER:
213                 printf("Recognized Tincantools Trainer board (rev %d %s)\n",
214                         expansion_config.revision,
215                         expansion_config.fab_revision);
216                 MUX_TINCANTOOLS_ZIPPY();
217                 MUX_TINCANTOOLS_TRAINER();
218                 setenv("buddy", "trainer");
219                 break;
220         case TINCANTOOLS_SHOWDOG:
221                 printf("Recognized Tincantools Showdow board (rev %d %s)\n",
222                         expansion_config.revision,
223                         expansion_config.fab_revision);
224                 /* Place holder for DSS2 definition for showdog lcd */
225                 setenv("defaultdisplay", "showdoglcd");
226                 setenv("buddy", "showdog");
227                 break;
228         case KBADC_BEAGLEFPGA:
229                 printf("Recognized KBADC Beagle FPGA board\n");
230                 MUX_KBADC_BEAGLEFPGA();
231                 setenv("buddy", "beaglefpga");
232                 break;
233         case BEAGLE_NO_EEPROM:
234                 printf("No EEPROM on expansion board\n");
235                 setenv("buddy", "none");
236                 break;
237         default:
238                 printf("Unrecognized expansion board: %x\n",
239                         expansion_config.device_vendor);
240                 setenv("buddy", "unknown");
241         }
242
243         if (expansion_config.content == 1)
244                 setenv(expansion_config.env_var, expansion_config.env_setting);
245
246         twl4030_power_init();
247         twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
248
249         /* Configure GPIOs to output */
250         writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe);
251         writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
252                 GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe);
253
254         /* Set GPIOs */
255         writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1,
256                 &gpio6_base->setdataout);
257         writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
258                 GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout);
259
260         dieid_num_r();
261
262         return 0;
263 }
264
265 /*
266  * Routine: set_muxconf_regs
267  * Description: Setting up the configuration Mux registers specific to the
268  *              hardware. Many pins need to be moved from protect to primary
269  *              mode.
270  */
271 void set_muxconf_regs(void)
272 {
273         MUX_BEAGLE();
274 }
275
276 #ifdef CONFIG_GENERIC_MMC
277 int board_mmc_init(bd_t *bis)
278 {
279         omap_mmc_init(0);
280         return 0;
281 }
282 #endif