Linux/arch/arm/mach-omap2/board-overo.c

  1 /*
  2  * board-overo.c (Gumstix Overo)
  3  *
  4  * Initial code: Steve Sakoman <steve@sakoman.com>
  5  *
  6  * This program is free software; you can redistribute it and/or
  7  * modify it under the terms of the GNU General Public License
  8  * version 2 as published by the Free Software Foundation.
  9  *
 10  * This program is distributed in the hope that it will be useful, but
 11  * WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 13  * General Public License for more details.
 14  *
 15  * You should have received a copy of the GNU General Public License
 16  * along with this program; if not, write to the Free Software
 17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 18  * 02110-1301 USA
 19  *
 20  */
 21 
 22 #include <linux/clk.h>
 23 #include <linux/delay.h>
 24 #include <linux/err.h>
 25 #include <linux/init.h>
 26 #include <linux/io.h>
 27 #include <linux/kernel.h>
 28 #include <linux/platform_device.h>
 29 #include <linux/i2c/twl.h>
 30 #include <linux/regulator/machine.h>
 31 
 32 #include <linux/mtd/mtd.h>
 33 #include <linux/mtd/nand.h>
 34 #include <linux/mtd/partitions.h>
 35 
 36 #include <asm/mach-types.h>
 37 #include <asm/mach/arch.h>
 38 #include <asm/mach/flash.h>
 39 #include <asm/mach/map.h>
 40 
 41 #include <plat/board.h>
 42 #include <plat/common.h>
 43 #include <mach/gpio.h>
 44 #include <plat/gpmc.h>
 45 #include <mach/hardware.h>
 46 #include <plat/nand.h>
 47 #include <plat/usb.h>
 48 
 49 #include "mux.h"
 50 #include "sdram-micron-mt46h32m32lf-6.h"
 51 #include "mmc-twl4030.h"
 52 
 53 #define OVERO_GPIO_BT_XGATE     15
 54 #define OVERO_GPIO_W2W_NRESET   16
 55 #define OVERO_GPIO_PENDOWN      114
 56 #define OVERO_GPIO_BT_NRESET    164
 57 #define OVERO_GPIO_USBH_CPEN    168
 58 #define OVERO_GPIO_USBH_NRESET  183
 59 
 60 #define NAND_BLOCK_SIZE SZ_128K
 61 #define GPMC_CS0_BASE  0x60
 62 #define GPMC_CS_SIZE   0x30
 63 
 64 #define OVERO_SMSC911X_CS      5
 65 #define OVERO_SMSC911X_GPIO    176
 66 
 67 #if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
 68         defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
 69 
 70 #include <plat/mcspi.h>
 71 #include <linux/spi/spi.h>
 72 #include <linux/spi/ads7846.h>
 73 
 74 static struct omap2_mcspi_device_config ads7846_mcspi_config = {
 75         .turbo_mode     = 0,
 76         .single_channel = 1,    /* 0: slave, 1: master */
 77 };
 78 
 79 static int ads7846_get_pendown_state(void)
 80 {
 81         return !gpio_get_value(OVERO_GPIO_PENDOWN);
 82 }
 83 
 84 static struct ads7846_platform_data ads7846_config = {
 85         .x_max                  = 0x0fff,
 86         .y_max                  = 0x0fff,
 87         .x_plate_ohms           = 180,
 88         .pressure_max           = 255,
 89         .debounce_max           = 10,
 90         .debounce_tol           = 3,
 91         .debounce_rep           = 1,
 92         .get_pendown_state      = ads7846_get_pendown_state,
 93         .keep_vref_on           = 1,
 94 };
 95 
 96 static struct spi_board_info overo_spi_board_info[] __initdata = {
 97         {
 98                 .modalias               = "ads7846",
 99                 .bus_num                = 1,
100                 .chip_select            = 0,
101                 .max_speed_hz           = 1500000,
102                 .controller_data        = &ads7846_mcspi_config,
103                 .irq                    = OMAP_GPIO_IRQ(OVERO_GPIO_PENDOWN),
104                 .platform_data          = &ads7846_config,
105         }
106 };
107 
108 static void __init overo_ads7846_init(void)
109 {
110         if ((gpio_request(OVERO_GPIO_PENDOWN, "ADS7846_PENDOWN") == 0) &&
111             (gpio_direction_input(OVERO_GPIO_PENDOWN) == 0)) {
112                 gpio_export(OVERO_GPIO_PENDOWN, 0);
113         } else {
114                 printk(KERN_ERR "could not obtain gpio for ADS7846_PENDOWN\n");
115                 return;
116         }
117 
118         spi_register_board_info(overo_spi_board_info,
119                         ARRAY_SIZE(overo_spi_board_info));
120 }
121 
122 #else
123 static inline void __init overo_ads7846_init(void) { return; }
124 #endif
125 
126 #if defined(CONFIG_SMSC911X) || defined(CONFIG_SMSC911X_MODULE)
127 
128 #include <linux/smsc911x.h>
129 
130 static struct resource overo_smsc911x_resources[] = {
131         {
132                 .name   = "smsc911x-memory",
133                 .flags  = IORESOURCE_MEM,
134         },
135         {
136                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
137         },
138 };
139 
140 static struct smsc911x_platform_config overo_smsc911x_config = {
141         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
142         .irq_type       = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
143         .flags          = SMSC911X_USE_32BIT ,
144         .phy_interface  = PHY_INTERFACE_MODE_MII,
145 };
146 
147 static struct platform_device overo_smsc911x_device = {
148         .name           = "smsc911x",
149         .id             = -1,
150         .num_resources  = ARRAY_SIZE(overo_smsc911x_resources),
151         .resource       = overo_smsc911x_resources,
152         .dev            = {
153                 .platform_data = &overo_smsc911x_config,
154         },
155 };
156 
157 static inline void __init overo_init_smsc911x(void)
158 {
159         unsigned long cs_mem_base;
160 
161         if (gpmc_cs_request(OVERO_SMSC911X_CS, SZ_16M, &cs_mem_base) < 0) {
162                 printk(KERN_ERR "Failed request for GPMC mem for smsc911x\n");
163                 return;
164         }
165 
166         overo_smsc911x_resources[0].start = cs_mem_base + 0x0;
167         overo_smsc911x_resources[0].end   = cs_mem_base + 0xff;
168 
169         if ((gpio_request(OVERO_SMSC911X_GPIO, "SMSC911X IRQ") == 0) &&
170             (gpio_direction_input(OVERO_SMSC911X_GPIO) == 0)) {
171                 gpio_export(OVERO_SMSC911X_GPIO, 0);
172         } else {
173                 printk(KERN_ERR "could not obtain gpio for SMSC911X IRQ\n");
174                 return;
175         }
176 
177         overo_smsc911x_resources[1].start = OMAP_GPIO_IRQ(OVERO_SMSC911X_GPIO);
178         overo_smsc911x_resources[1].end   = 0;
179 
180         platform_device_register(&overo_smsc911x_device);
181 }
182 
183 #else
184 static inline void __init overo_init_smsc911x(void) { return; }
185 #endif
186 
187 static struct mtd_partition overo_nand_partitions[] = {
188         {
189                 .name           = "xloader",
190                 .offset         = 0,                    /* Offset = 0x00000 */
191                 .size           = 4 * NAND_BLOCK_SIZE,
192                 .mask_flags     = MTD_WRITEABLE
193         },
194         {
195                 .name           = "uboot",
196                 .offset         = MTDPART_OFS_APPEND,   /* Offset = 0x80000 */
197                 .size           = 14 * NAND_BLOCK_SIZE,
198         },
199         {
200                 .name           = "uboot environment",
201                 .offset         = MTDPART_OFS_APPEND,   /* Offset = 0x240000 */
202                 .size           = 2 * NAND_BLOCK_SIZE,
203         },
204         {
205                 .name           = "linux",
206                 .offset         = MTDPART_OFS_APPEND,   /* Offset = 0x280000 */
207                 .size           = 32 * NAND_BLOCK_SIZE,
208         },
209         {
210                 .name           = "rootfs",
211                 .offset         = MTDPART_OFS_APPEND,   /* Offset = 0x680000 */
212                 .size           = MTDPART_SIZ_FULL,
213         },
214 };
215 
216 static struct omap_nand_platform_data overo_nand_data = {
217         .parts = overo_nand_partitions,
218         .nr_parts = ARRAY_SIZE(overo_nand_partitions),
219         .dma_channel = -1,      /* disable DMA in OMAP NAND driver */
220 };
221 
222 static struct resource overo_nand_resource = {
223         .flags          = IORESOURCE_MEM,
224 };
225 
226 static struct platform_device overo_nand_device = {
227         .name           = "omap2-nand",
228         .id             = -1,
229         .dev            = {
230                 .platform_data  = &overo_nand_data,
231         },
232         .num_resources  = 1,
233         .resource       = &overo_nand_resource,
234 };
235 
236 
237 static void __init overo_flash_init(void)
238 {
239         u8 cs = 0;
240         u8 nandcs = GPMC_CS_NUM + 1;
241 
242         u32 gpmc_base_add = OMAP34XX_GPMC_VIRT;
243 
244         /* find out the chip-select on which NAND exists */
245         while (cs < GPMC_CS_NUM) {
246                 u32 ret = 0;
247                 ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
248 
249                 if ((ret & 0xC00) == 0x800) {
250                         printk(KERN_INFO "Found NAND on CS%d\n", cs);
251                         if (nandcs > GPMC_CS_NUM)
252                                 nandcs = cs;
253                 }
254                 cs++;
255         }
256 
257         if (nandcs > GPMC_CS_NUM) {
258                 printk(KERN_INFO "NAND: Unable to find configuration "
259                                  "in GPMC\n ");
260                 return;
261         }
262 
263         if (nandcs < GPMC_CS_NUM) {
264                 overo_nand_data.cs = nandcs;
265                 overo_nand_data.gpmc_cs_baseaddr = (void *)
266                         (gpmc_base_add + GPMC_CS0_BASE + nandcs * GPMC_CS_SIZE);
267                 overo_nand_data.gpmc_baseaddr = (void *) (gpmc_base_add);
268 
269                 printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
270                 if (platform_device_register(&overo_nand_device) < 0)
271                         printk(KERN_ERR "Unable to register NAND device\n");
272         }
273 }
274 
275 static struct twl4030_hsmmc_info mmc[] = {
276         {
277                 .mmc            = 1,
278                 .wires          = 4,
279                 .gpio_cd        = -EINVAL,
280                 .gpio_wp        = -EINVAL,
281         },
282         {
283                 .mmc            = 2,
284                 .wires          = 4,
285                 .gpio_cd        = -EINVAL,
286                 .gpio_wp        = -EINVAL,
287                 .transceiver    = true,
288                 .ocr_mask       = 0x00100000,   /* 3.3V */
289         },
290         {}      /* Terminator */
291 };
292 
293 static struct regulator_consumer_supply overo_vmmc1_supply = {
294         .supply                 = "vmmc",
295 };
296 
297 static int overo_twl_gpio_setup(struct device *dev,
298                 unsigned gpio, unsigned ngpio)
299 {
300         twl4030_mmc_init(mmc);
301 
302         overo_vmmc1_supply.dev = mmc[0].dev;
303 
304         return 0;
305 }
306 
307 static struct twl4030_gpio_platform_data overo_gpio_data = {
308         .gpio_base      = OMAP_MAX_GPIO_LINES,
309         .irq_base       = TWL4030_GPIO_IRQ_BASE,
310         .irq_end        = TWL4030_GPIO_IRQ_END,
311         .setup          = overo_twl_gpio_setup,
312 };
313 
314 static struct twl4030_usb_data overo_usb_data = {
315         .usb_mode       = T2_USB_MODE_ULPI,
316 };
317 
318 static struct regulator_init_data overo_vmmc1 = {
319         .constraints = {
320                 .min_uV                 = 1850000,
321                 .max_uV                 = 3150000,
322                 .valid_modes_mask       = REGULATOR_MODE_NORMAL
323                                         | REGULATOR_MODE_STANDBY,
324                 .valid_ops_mask         = REGULATOR_CHANGE_VOLTAGE
325                                         | REGULATOR_CHANGE_MODE
326                                         | REGULATOR_CHANGE_STATUS,
327         },
328         .num_consumer_supplies  = 1,
329         .consumer_supplies      = &overo_vmmc1_supply,
330 };
331 
332 static struct twl4030_codec_audio_data overo_audio_data = {
333         .audio_mclk = 26000000,
334 };
335 
336 static struct twl4030_codec_data overo_codec_data = {
337         .audio_mclk = 26000000,
338         .audio = &overo_audio_data,
339 };
340 
341 /* mmc2 (WLAN) and Bluetooth don't use twl4030 regulators */
342 
343 static struct twl4030_platform_data overo_twldata = {
344         .irq_base       = TWL4030_IRQ_BASE,
345         .irq_end        = TWL4030_IRQ_END,
346         .gpio           = &overo_gpio_data,
347         .usb            = &overo_usb_data,
348         .codec          = &overo_codec_data,
349         .vmmc1          = &overo_vmmc1,
350 };
351 
352 static struct i2c_board_info __initdata overo_i2c_boardinfo[] = {
353         {
354                 I2C_BOARD_INFO("tps65950", 0x48),
355                 .flags = I2C_CLIENT_WAKE,
356                 .irq = INT_34XX_SYS_NIRQ,
357                 .platform_data = &overo_twldata,
358         },
359 };
360 
361 static int __init overo_i2c_init(void)
362 {
363         omap_register_i2c_bus(1, 2600, overo_i2c_boardinfo,
364                         ARRAY_SIZE(overo_i2c_boardinfo));
365         /* i2c2 pins are used for gpio */
366         omap_register_i2c_bus(3, 400, NULL, 0);
367         return 0;
368 }
369 
370 static struct platform_device overo_lcd_device = {
371         .name           = "overo_lcd",
372         .id             = -1,
373 };
374 
375 static struct omap_lcd_config overo_lcd_config __initdata = {
376         .ctrl_name      = "internal",
377 };
378 
379 static struct omap_board_config_kernel overo_config[] __initdata = {
380         { OMAP_TAG_LCD,         &overo_lcd_config },
381 };
382 
383 static void __init overo_init_irq(void)
384 {
385         omap_board_config = overo_config;
386         omap_board_config_size = ARRAY_SIZE(overo_config);
387         omap2_init_common_hw(mt46h32m32lf6_sdrc_params,
388                              mt46h32m32lf6_sdrc_params);
389         omap_init_irq();
390         omap_gpio_init();
391 }
392 
393 static struct platform_device *overo_devices[] __initdata = {
394         &overo_lcd_device,
395 };
396 
397 static struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {
398         .port_mode[0] = EHCI_HCD_OMAP_MODE_UNKNOWN,
399         .port_mode[1] = EHCI_HCD_OMAP_MODE_PHY,
400         .port_mode[2] = EHCI_HCD_OMAP_MODE_UNKNOWN,
401 
402         .phy_reset  = true,
403         .reset_gpio_port[0]  = -EINVAL,
404         .reset_gpio_port[1]  = OVERO_GPIO_USBH_NRESET,
405         .reset_gpio_port[2]  = -EINVAL
406 };
407 
408 #ifdef CONFIG_OMAP_MUX
409 static struct omap_board_mux board_mux[] __initdata = {
410         { .reg_offset = OMAP_MUX_TERMINATOR },
411 };
412 #else
413 #define board_mux       NULL
414 #endif
415 
416 static void __init overo_init(void)
417 {
418         omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
419         overo_i2c_init();
420         platform_add_devices(overo_devices, ARRAY_SIZE(overo_devices));
421         omap_serial_init();
422         overo_flash_init();
423         usb_musb_init();
424         usb_ehci_init(&ehci_pdata);
425         overo_ads7846_init();
426         overo_init_smsc911x();
427 
428         /* Ensure SDRC pins are mux'd for self-refresh */
429         omap_mux_init_signal("sdrc_cke0", OMAP_PIN_OUTPUT);
430         omap_mux_init_signal("sdrc_cke1", OMAP_PIN_OUTPUT);
431 
432         if ((gpio_request(OVERO_GPIO_W2W_NRESET,
433                           "OVERO_GPIO_W2W_NRESET") == 0) &&
434             (gpio_direction_output(OVERO_GPIO_W2W_NRESET, 1) == 0)) {
435                 gpio_export(OVERO_GPIO_W2W_NRESET, 0);
436                 gpio_set_value(OVERO_GPIO_W2W_NRESET, 0);
437                 udelay(10);
438                 gpio_set_value(OVERO_GPIO_W2W_NRESET, 1);
439         } else {
440                 printk(KERN_ERR "could not obtain gpio for "
441                                         "OVERO_GPIO_W2W_NRESET\n");
442         }
443 
444         if ((gpio_request(OVERO_GPIO_BT_XGATE, "OVERO_GPIO_BT_XGATE") == 0) &&
445             (gpio_direction_output(OVERO_GPIO_BT_XGATE, 0) == 0))
446                 gpio_export(OVERO_GPIO_BT_XGATE, 0);
447         else
448                 printk(KERN_ERR "could not obtain gpio for OVERO_GPIO_BT_XGATE\n");
449 
450         if ((gpio_request(OVERO_GPIO_BT_NRESET, "OVERO_GPIO_BT_NRESET") == 0) &&
451             (gpio_direction_output(OVERO_GPIO_BT_NRESET, 1) == 0)) {
452                 gpio_export(OVERO_GPIO_BT_NRESET, 0);
453                 gpio_set_value(OVERO_GPIO_BT_NRESET, 0);
454                 mdelay(6);
455                 gpio_set_value(OVERO_GPIO_BT_NRESET, 1);
456         } else {
457                 printk(KERN_ERR "could not obtain gpio for "
458                                         "OVERO_GPIO_BT_NRESET\n");
459         }
460 
461         if ((gpio_request(OVERO_GPIO_USBH_CPEN, "OVERO_GPIO_USBH_CPEN") == 0) &&
462             (gpio_direction_output(OVERO_GPIO_USBH_CPEN, 1) == 0))
463                 gpio_export(OVERO_GPIO_USBH_CPEN, 0);
464         else
465                 printk(KERN_ERR "could not obtain gpio for "
466                                         "OVERO_GPIO_USBH_CPEN\n");
467 }
468 
469 static void __init overo_map_io(void)
470 {
471         omap2_set_globals_343x();
472         omap2_map_common_io();
473 }
474 
475 MACHINE_START(OVERO, "Gumstix Overo")
476         .phys_io        = 0x48000000,
477         .io_pg_offst    = ((0xfa000000) >> 18) & 0xfffc,
478         .boot_params    = 0x80000100,
479         .map_io         = overo_map_io,
480         .init_irq       = overo_init_irq,
481         .init_machine   = overo_init,
482         .timer          = &omap_timer,
483 MACHINE_END
484 

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