2 * TI DaVinci EVM board support
4 * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
6 * 2007 (c) MontaVista Software, Inc. This file is licensed under
7 * the terms of the GNU General Public License version 2. This program
8 * is licensed "as is" without any warranty of any kind, whether express
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/dma-mapping.h>
15 #include <linux/platform_device.h>
16 #include <linux/gpio.h>
17 #include <linux/leds.h>
19 #include <linux/i2c.h>
20 #include <linux/i2c/pcf857x.h>
21 #include <linux/i2c/at24.h>
23 #include <linux/mtd/mtd.h>
24 #include <linux/mtd/partitions.h>
25 #include <linux/mtd/physmap.h>
28 #include <asm/setup.h>
29 #include <asm/mach-types.h>
31 #include <asm/mach/arch.h>
32 #include <asm/mach/map.h>
33 #include <asm/mach/flash.h>
35 #include <mach/hardware.h>
36 #include <mach/common.h>
39 /* other misc. init functions */
40 void __init davinci_psc_init(void);
41 void __init davinci_irq_init(void);
42 void __init davinci_map_common_io(void);
43 void __init davinci_init_common_hw(void);
45 #if defined(CONFIG_MTD_PHYSMAP) || \
46 defined(CONFIG_MTD_PHYSMAP_MODULE)
48 static struct mtd_partition davinci_evm_norflash_partitions[] = {
49 /* bootloader (U-Boot, etc) in first 4 sectors */
54 .mask_flags = MTD_WRITEABLE, /* force read-only */
56 /* bootloader params in the next 1 sectors */
59 .offset = MTDPART_OFS_APPEND,
66 .offset = MTDPART_OFS_APPEND,
73 .offset = MTDPART_OFS_APPEND,
74 .size = MTDPART_SIZ_FULL,
79 static struct physmap_flash_data davinci_evm_norflash_data = {
81 .parts = davinci_evm_norflash_partitions,
82 .nr_parts = ARRAY_SIZE(davinci_evm_norflash_partitions),
85 /* NOTE: CFI probe will correctly detect flash part as 32M, but EMIF
86 * limits addresses to 16M, so using addresses past 16M will wrap */
87 static struct resource davinci_evm_norflash_resource = {
88 .start = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE,
89 .end = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE + SZ_16M - 1,
90 .flags = IORESOURCE_MEM,
93 static struct platform_device davinci_evm_norflash_device = {
94 .name = "physmap-flash",
97 .platform_data = &davinci_evm_norflash_data,
100 .resource = &davinci_evm_norflash_resource,
105 #if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
106 defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
108 static struct resource ide_resources[] = {
110 .start = DAVINCI_CFC_ATA_BASE,
111 .end = DAVINCI_CFC_ATA_BASE + 0x7ff,
112 .flags = IORESOURCE_MEM,
117 .flags = IORESOURCE_IRQ,
121 static u64 ide_dma_mask = DMA_32BIT_MASK;
123 static struct platform_device ide_dev = {
124 .name = "palm_bk3710",
126 .resource = ide_resources,
127 .num_resources = ARRAY_SIZE(ide_resources),
129 .dma_mask = &ide_dma_mask,
130 .coherent_dma_mask = DMA_32BIT_MASK,
136 /*----------------------------------------------------------------------*/
142 #define PCF_Uxx_BASE(x) (DAVINCI_N_GPIO + ((x) * 8))
147 static struct gpio_led evm_leds[] = {
148 { .name = "DS8", .active_low = 1,
149 .default_trigger = "heartbeat", },
150 { .name = "DS7", .active_low = 1, },
151 { .name = "DS6", .active_low = 1, },
152 { .name = "DS5", .active_low = 1, },
153 { .name = "DS4", .active_low = 1, },
154 { .name = "DS3", .active_low = 1, },
155 { .name = "DS2", .active_low = 1,
156 .default_trigger = "mmc0", },
157 { .name = "DS1", .active_low = 1,
158 .default_trigger = "ide-disk", },
161 static const struct gpio_led_platform_data evm_led_data = {
162 .num_leds = ARRAY_SIZE(evm_leds),
166 static struct platform_device *evm_led_dev;
169 evm_led_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
171 struct gpio_led *leds = evm_leds;
179 /* what an extremely annoying way to be forced to handle
180 * device unregistration ...
182 evm_led_dev = platform_device_alloc("leds-gpio", 0);
183 platform_device_add_data(evm_led_dev,
184 &evm_led_data, sizeof evm_led_data);
186 evm_led_dev->dev.parent = &client->dev;
187 status = platform_device_add(evm_led_dev);
189 platform_device_put(evm_led_dev);
196 evm_led_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
199 platform_device_unregister(evm_led_dev);
205 static struct pcf857x_platform_data pcf_data_u2 = {
206 .gpio_base = PCF_Uxx_BASE(0),
207 .setup = evm_led_setup,
208 .teardown = evm_led_teardown,
212 /* U18 - A/V clock generator and user switch */
217 sw_show(struct device *d, struct device_attribute *a, char *buf)
219 char *s = gpio_get_value_cansleep(sw_gpio) ? "on\n" : "off\n";
225 static DEVICE_ATTR(user_sw, S_IRUGO, sw_show, NULL);
228 evm_u18_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
232 /* export dip switch option */
234 status = gpio_request(sw_gpio, "user_sw");
236 status = gpio_direction_input(sw_gpio);
238 status = device_create_file(&client->dev, &dev_attr_user_sw);
244 /* audio PLL: 48 kHz (vs 44.1 or 32), single rate (vs double) */
245 gpio_request(gpio + 3, "pll_fs2");
246 gpio_direction_output(gpio + 3, 0);
248 gpio_request(gpio + 2, "pll_fs1");
249 gpio_direction_output(gpio + 2, 0);
251 gpio_request(gpio + 1, "pll_sr");
252 gpio_direction_output(gpio + 1, 0);
258 evm_u18_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
265 device_remove_file(&client->dev, &dev_attr_user_sw);
271 static struct pcf857x_platform_data pcf_data_u18 = {
272 .gpio_base = PCF_Uxx_BASE(1),
273 .n_latch = (1 << 3) | (1 << 2) | (1 << 1),
274 .setup = evm_u18_setup,
275 .teardown = evm_u18_teardown,
279 /* U35 - various I/O signals used to manage USB, CF, ATA, etc */
282 evm_u35_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
284 /* p0 = nDRV_VBUS (initial: don't supply it) */
285 gpio_request(gpio + 0, "nDRV_VBUS");
286 gpio_direction_output(gpio + 0, 1);
289 gpio_request(gpio + 1, "VDDIMX_EN");
290 gpio_direction_output(gpio + 1, 1);
293 gpio_request(gpio + 2, "VLYNQ_EN");
294 gpio_direction_output(gpio + 2, 1);
296 /* p3 = n3V3_CF_RESET (initial: stay in reset) */
297 gpio_request(gpio + 3, "nCF_RESET");
298 gpio_direction_output(gpio + 3, 0);
302 /* p5 = 1V8_WLAN_RESET (initial: stay in reset) */
303 gpio_request(gpio + 5, "WLAN_RESET");
304 gpio_direction_output(gpio + 5, 1);
306 /* p6 = nATA_SEL (initial: select) */
307 gpio_request(gpio + 6, "nATA_SEL");
308 gpio_direction_output(gpio + 6, 0);
310 /* p7 = nCF_SEL (initial: deselect) */
311 gpio_request(gpio + 7, "nCF_SEL");
312 gpio_direction_output(gpio + 7, 1);
318 evm_u35_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
330 static struct pcf857x_platform_data pcf_data_u35 = {
331 .gpio_base = PCF_Uxx_BASE(2),
332 .setup = evm_u35_setup,
333 .teardown = evm_u35_teardown,
336 /*----------------------------------------------------------------------*/
338 /* Most of this EEPROM is unused, but U-Boot uses some data:
339 * - 0x7f00, 6 bytes Ethernet Address
340 * - 0x0039, 1 byte NTSC vs PAL (bit 0x80 == PAL)
341 * - ... newer boards may have more
343 static struct at24_platform_data eeprom_info = {
344 .byte_len = (256*1024) / 8,
346 .flags = AT24_FLAG_ADDR16,
349 static struct i2c_board_info __initdata i2c_info[] = {
351 I2C_BOARD_INFO("pcf8574", 0x38),
352 .platform_data = &pcf_data_u2,
355 I2C_BOARD_INFO("pcf8574", 0x39),
356 .platform_data = &pcf_data_u18,
359 I2C_BOARD_INFO("pcf8574", 0x3a),
360 .platform_data = &pcf_data_u35,
363 I2C_BOARD_INFO("24c256", 0x50),
364 .platform_data = &eeprom_info,
367 * - tvl320aic33 audio codec (0x1b)
368 * - msp430 microcontroller (0x23)
369 * - tvp5146 video decoder (0x5d)
373 /* The msp430 uses a slow bitbanged I2C implementation (ergo 20 KHz),
374 * which requires 100 usec of idle bus after i2c writes sent to it.
376 static struct davinci_i2c_platform_data i2c_pdata = {
377 .bus_freq = 20 /* kHz */,
378 .bus_delay = 100 /* usec */,
381 static void __init evm_init_i2c(void)
383 davinci_init_i2c(&i2c_pdata);
384 i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));
387 static struct platform_device *davinci_evm_devices[] __initdata = {
388 #if defined(CONFIG_MTD_PHYSMAP) || \
389 defined(CONFIG_MTD_PHYSMAP_MODULE)
390 &davinci_evm_norflash_device,
392 #if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
393 defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
399 davinci_evm_map_io(void)
401 davinci_map_common_io();
404 static __init void davinci_evm_init(void)
408 #if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
409 defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
410 #if defined(CONFIG_MTD_PHYSMAP) || \
411 defined(CONFIG_MTD_PHYSMAP_MODULE)
412 printk(KERN_WARNING "WARNING: both IDE and NOR flash are enabled, "
413 "but share pins.\n\t Disable IDE for NOR support.\n");
417 platform_add_devices(davinci_evm_devices,
418 ARRAY_SIZE(davinci_evm_devices));
421 /* irlml6401 sustains over 3A, switches 5V in under 8 msec */
425 static __init void davinci_evm_irq_init(void)
427 davinci_init_common_hw();
431 MACHINE_START(DAVINCI_EVM, "DaVinci EVM")
432 /* Maintainer: MontaVista Software <source@mvista.com> */
434 .io_pg_offst = (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc,
435 .boot_params = (DAVINCI_DDR_BASE + 0x100),
436 .map_io = davinci_evm_map_io,
437 .init_irq = davinci_evm_irq_init,
438 .timer = &davinci_timer,
439 .init_machine = davinci_evm_init,