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>
18 #include <linux/memory.h>
20 #include <linux/i2c.h>
21 #include <linux/i2c/pcf857x.h>
22 #include <linux/i2c/at24.h>
23 #include <linux/etherdevice.h>
24 #include <linux/mtd/mtd.h>
25 #include <linux/mtd/nand.h>
26 #include <linux/mtd/partitions.h>
27 #include <linux/mtd/physmap.h>
29 #include <linux/phy.h>
30 #include <linux/clk.h>
32 #include <asm/setup.h>
33 #include <asm/mach-types.h>
35 #include <asm/mach/arch.h>
36 #include <asm/mach/map.h>
37 #include <asm/mach/flash.h>
39 #include <mach/dm644x.h>
40 #include <mach/common.h>
42 #include <mach/serial.h>
45 #include <mach/nand.h>
47 #include <mach/emac.h>
48 #include <mach/common.h>
50 #define DM644X_EVM_PHY_MASK (0x2)
51 #define DM644X_EVM_MDIO_FREQUENCY (2200000) /* PHY bus frequency */
53 #define DAVINCI_CFC_ATA_BASE 0x01C66000
55 #define DAVINCI_ASYNC_EMIF_CONTROL_BASE 0x01e00000
56 #define DAVINCI_ASYNC_EMIF_DATA_CE0_BASE 0x02000000
57 #define DAVINCI_ASYNC_EMIF_DATA_CE1_BASE 0x04000000
58 #define DAVINCI_ASYNC_EMIF_DATA_CE2_BASE 0x06000000
59 #define DAVINCI_ASYNC_EMIF_DATA_CE3_BASE 0x08000000
61 #define LXT971_PHY_ID (0x001378e2)
62 #define LXT971_PHY_MASK (0xfffffff0)
64 static struct mtd_partition davinci_evm_norflash_partitions[] = {
65 /* bootloader (UBL, U-Boot, etc) in first 5 sectors */
70 .mask_flags = MTD_WRITEABLE, /* force read-only */
72 /* bootloader params in the next 1 sectors */
75 .offset = MTDPART_OFS_APPEND,
82 .offset = MTDPART_OFS_APPEND,
89 .offset = MTDPART_OFS_APPEND,
90 .size = MTDPART_SIZ_FULL,
95 static struct physmap_flash_data davinci_evm_norflash_data = {
97 .parts = davinci_evm_norflash_partitions,
98 .nr_parts = ARRAY_SIZE(davinci_evm_norflash_partitions),
101 /* NOTE: CFI probe will correctly detect flash part as 32M, but EMIF
102 * limits addresses to 16M, so using addresses past 16M will wrap */
103 static struct resource davinci_evm_norflash_resource = {
104 .start = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE,
105 .end = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE + SZ_16M - 1,
106 .flags = IORESOURCE_MEM,
109 static struct platform_device davinci_evm_norflash_device = {
110 .name = "physmap-flash",
113 .platform_data = &davinci_evm_norflash_data,
116 .resource = &davinci_evm_norflash_resource,
119 /* DM644x EVM includes a 64 MByte small-page NAND flash (16K blocks).
120 * It may used instead of the (default) NOR chip to boot, using TI's
121 * tools to install the secondary boot loader (UBL) and U-Boot.
123 struct mtd_partition davinci_evm_nandflash_partition[] = {
124 /* Bootloader layout depends on whose u-boot is installed, but we
125 * can hide all the details.
126 * - block 0 for u-boot environment ... in mainline u-boot
127 * - block 1 for UBL (plus up to four backup copies in blocks 2..5)
128 * - blocks 6...? for u-boot
129 * - blocks 16..23 for u-boot environment ... in TI's u-boot
132 .name = "bootloader",
134 .size = SZ_256K + SZ_128K,
135 .mask_flags = MTD_WRITEABLE, /* force read-only */
140 .offset = MTDPART_OFS_APPEND,
144 /* File system (older GIT kernels started this on the 5MB mark) */
146 .name = "filesystem",
147 .offset = MTDPART_OFS_APPEND,
148 .size = MTDPART_SIZ_FULL,
151 /* A few blocks at end hold a flash BBT ... created by TI's CCS
152 * using flashwriter_nand.out, but ignored by TI's versions of
153 * Linux and u-boot. We boot faster by using them.
157 static struct davinci_nand_pdata davinci_evm_nandflash_data = {
158 .parts = davinci_evm_nandflash_partition,
159 .nr_parts = ARRAY_SIZE(davinci_evm_nandflash_partition),
160 .ecc_mode = NAND_ECC_HW,
161 .options = NAND_USE_FLASH_BBT,
164 static struct resource davinci_evm_nandflash_resource[] = {
166 .start = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE,
167 .end = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE + SZ_16M - 1,
168 .flags = IORESOURCE_MEM,
170 .start = DAVINCI_ASYNC_EMIF_CONTROL_BASE,
171 .end = DAVINCI_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
172 .flags = IORESOURCE_MEM,
176 static struct platform_device davinci_evm_nandflash_device = {
177 .name = "davinci_nand",
180 .platform_data = &davinci_evm_nandflash_data,
182 .num_resources = ARRAY_SIZE(davinci_evm_nandflash_resource),
183 .resource = davinci_evm_nandflash_resource,
186 static u64 davinci_fb_dma_mask = DMA_BIT_MASK(32);
188 static struct platform_device davinci_fb_device = {
192 .dma_mask = &davinci_fb_dma_mask,
193 .coherent_dma_mask = DMA_BIT_MASK(32),
198 static struct platform_device rtc_dev = {
199 .name = "rtc_davinci_evm",
203 static struct resource ide_resources[] = {
205 .start = DAVINCI_CFC_ATA_BASE,
206 .end = DAVINCI_CFC_ATA_BASE + 0x7ff,
207 .flags = IORESOURCE_MEM,
212 .flags = IORESOURCE_IRQ,
216 static u64 ide_dma_mask = DMA_BIT_MASK(32);
218 static struct platform_device ide_dev = {
219 .name = "palm_bk3710",
221 .resource = ide_resources,
222 .num_resources = ARRAY_SIZE(ide_resources),
224 .dma_mask = &ide_dma_mask,
225 .coherent_dma_mask = DMA_BIT_MASK(32),
229 /*----------------------------------------------------------------------*/
235 #define PCF_Uxx_BASE(x) (DAVINCI_N_GPIO + ((x) * 8))
240 static struct gpio_led evm_leds[] = {
241 { .name = "DS8", .active_low = 1,
242 .default_trigger = "heartbeat", },
243 { .name = "DS7", .active_low = 1, },
244 { .name = "DS6", .active_low = 1, },
245 { .name = "DS5", .active_low = 1, },
246 { .name = "DS4", .active_low = 1, },
247 { .name = "DS3", .active_low = 1, },
248 { .name = "DS2", .active_low = 1,
249 .default_trigger = "mmc0", },
250 { .name = "DS1", .active_low = 1,
251 .default_trigger = "ide-disk", },
254 static const struct gpio_led_platform_data evm_led_data = {
255 .num_leds = ARRAY_SIZE(evm_leds),
259 static struct platform_device *evm_led_dev;
262 evm_led_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
264 struct gpio_led *leds = evm_leds;
272 /* what an extremely annoying way to be forced to handle
273 * device unregistration ...
275 evm_led_dev = platform_device_alloc("leds-gpio", 0);
276 platform_device_add_data(evm_led_dev,
277 &evm_led_data, sizeof evm_led_data);
279 evm_led_dev->dev.parent = &client->dev;
280 status = platform_device_add(evm_led_dev);
282 platform_device_put(evm_led_dev);
289 evm_led_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
292 platform_device_unregister(evm_led_dev);
298 static struct pcf857x_platform_data pcf_data_u2 = {
299 .gpio_base = PCF_Uxx_BASE(0),
300 .setup = evm_led_setup,
301 .teardown = evm_led_teardown,
305 /* U18 - A/V clock generator and user switch */
310 sw_show(struct device *d, struct device_attribute *a, char *buf)
312 char *s = gpio_get_value_cansleep(sw_gpio) ? "on\n" : "off\n";
318 static DEVICE_ATTR(user_sw, S_IRUGO, sw_show, NULL);
321 evm_u18_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
325 /* export dip switch option */
327 status = gpio_request(sw_gpio, "user_sw");
329 status = gpio_direction_input(sw_gpio);
331 status = device_create_file(&client->dev, &dev_attr_user_sw);
337 /* audio PLL: 48 kHz (vs 44.1 or 32), single rate (vs double) */
338 gpio_request(gpio + 3, "pll_fs2");
339 gpio_direction_output(gpio + 3, 0);
341 gpio_request(gpio + 2, "pll_fs1");
342 gpio_direction_output(gpio + 2, 0);
344 gpio_request(gpio + 1, "pll_sr");
345 gpio_direction_output(gpio + 1, 0);
351 evm_u18_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
358 device_remove_file(&client->dev, &dev_attr_user_sw);
364 static struct pcf857x_platform_data pcf_data_u18 = {
365 .gpio_base = PCF_Uxx_BASE(1),
366 .n_latch = (1 << 3) | (1 << 2) | (1 << 1),
367 .setup = evm_u18_setup,
368 .teardown = evm_u18_teardown,
372 /* U35 - various I/O signals used to manage USB, CF, ATA, etc */
375 evm_u35_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
377 /* p0 = nDRV_VBUS (initial: don't supply it) */
378 gpio_request(gpio + 0, "nDRV_VBUS");
379 gpio_direction_output(gpio + 0, 1);
382 gpio_request(gpio + 1, "VDDIMX_EN");
383 gpio_direction_output(gpio + 1, 1);
386 gpio_request(gpio + 2, "VLYNQ_EN");
387 gpio_direction_output(gpio + 2, 1);
389 /* p3 = n3V3_CF_RESET (initial: stay in reset) */
390 gpio_request(gpio + 3, "nCF_RESET");
391 gpio_direction_output(gpio + 3, 0);
395 /* p5 = 1V8_WLAN_RESET (initial: stay in reset) */
396 gpio_request(gpio + 5, "WLAN_RESET");
397 gpio_direction_output(gpio + 5, 1);
399 /* p6 = nATA_SEL (initial: select) */
400 gpio_request(gpio + 6, "nATA_SEL");
401 gpio_direction_output(gpio + 6, 0);
403 /* p7 = nCF_SEL (initial: deselect) */
404 gpio_request(gpio + 7, "nCF_SEL");
405 gpio_direction_output(gpio + 7, 1);
407 /* irlml6401 switches over 1A, in under 8 msec;
408 * now it can be managed by nDRV_VBUS ...
416 evm_u35_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
428 static struct pcf857x_platform_data pcf_data_u35 = {
429 .gpio_base = PCF_Uxx_BASE(2),
430 .setup = evm_u35_setup,
431 .teardown = evm_u35_teardown,
434 /*----------------------------------------------------------------------*/
436 /* Most of this EEPROM is unused, but U-Boot uses some data:
437 * - 0x7f00, 6 bytes Ethernet Address
438 * - 0x0039, 1 byte NTSC vs PAL (bit 0x80 == PAL)
439 * - ... newer boards may have more
442 static struct at24_platform_data eeprom_info = {
443 .byte_len = (256*1024) / 8,
445 .flags = AT24_FLAG_ADDR16,
446 .setup = davinci_get_mac_addr,
447 .context = (void *)0x7f00,
451 * MSP430 supports RTC, card detection, input from IR remote, and
452 * a bit more. It triggers interrupts on GPIO(7) from pressing
453 * buttons on the IR remote, and for card detect switches.
455 static struct i2c_client *dm6446evm_msp;
457 static int dm6446evm_msp_probe(struct i2c_client *client,
458 const struct i2c_device_id *id)
460 dm6446evm_msp = client;
464 static int dm6446evm_msp_remove(struct i2c_client *client)
466 dm6446evm_msp = NULL;
470 static const struct i2c_device_id dm6446evm_msp_ids[] = {
471 { "dm6446evm_msp", 0, },
472 { /* end of list */ },
475 static struct i2c_driver dm6446evm_msp_driver = {
476 .driver.name = "dm6446evm_msp",
477 .id_table = dm6446evm_msp_ids,
478 .probe = dm6446evm_msp_probe,
479 .remove = dm6446evm_msp_remove,
482 static int dm6444evm_msp430_get_pins(void)
484 static const char txbuf[2] = { 2, 4, };
486 struct i2c_msg msg[2] = {
488 .addr = dm6446evm_msp->addr,
491 .buf = (void __force *)txbuf,
494 .addr = dm6446evm_msp->addr,
505 /* Command 4 == get input state, returns port 2 and port3 data
506 * S Addr W [A] len=2 [A] cmd=4 [A]
507 * RS Addr R [A] [len=4] A [cmd=4] A [port2] A [port3] N P
509 status = i2c_transfer(dm6446evm_msp->adapter, msg, 2);
513 dev_dbg(&dm6446evm_msp->dev,
514 "PINS: %02x %02x %02x %02x\n",
515 buf[0], buf[1], buf[2], buf[3]);
517 return (buf[3] << 8) | buf[2];
520 static int dm6444evm_mmc_get_cd(int module)
522 int status = dm6444evm_msp430_get_pins();
524 return (status < 0) ? status : !(status & BIT(1));
527 static int dm6444evm_mmc_get_ro(int module)
529 int status = dm6444evm_msp430_get_pins();
531 return (status < 0) ? status : status & BIT(6 + 8);
534 static struct davinci_mmc_config dm6446evm_mmc_config = {
535 .get_cd = dm6444evm_mmc_get_cd,
536 .get_ro = dm6444evm_mmc_get_ro,
538 .version = MMC_CTLR_VERSION_1
541 static struct i2c_board_info __initdata i2c_info[] = {
543 I2C_BOARD_INFO("dm6446evm_msp", 0x23),
546 I2C_BOARD_INFO("pcf8574", 0x38),
547 .platform_data = &pcf_data_u2,
550 I2C_BOARD_INFO("pcf8574", 0x39),
551 .platform_data = &pcf_data_u18,
554 I2C_BOARD_INFO("pcf8574", 0x3a),
555 .platform_data = &pcf_data_u35,
558 I2C_BOARD_INFO("24c256", 0x50),
559 .platform_data = &eeprom_info,
562 * - tvl320aic33 audio codec (0x1b)
563 * - tvp5146 video decoder (0x5d)
567 /* The msp430 uses a slow bitbanged I2C implementation (ergo 20 KHz),
568 * which requires 100 usec of idle bus after i2c writes sent to it.
570 static struct davinci_i2c_platform_data i2c_pdata = {
571 .bus_freq = 20 /* kHz */,
572 .bus_delay = 100 /* usec */,
575 static void __init evm_init_i2c(void)
577 davinci_init_i2c(&i2c_pdata);
578 i2c_add_driver(&dm6446evm_msp_driver);
579 i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));
582 static struct platform_device *davinci_evm_devices[] __initdata = {
587 static struct davinci_uart_config uart_config __initdata = {
588 .enabled_uarts = (1 << 0),
592 davinci_evm_map_io(void)
597 static int davinci_phy_fixup(struct phy_device *phydev)
599 unsigned int control;
600 /* CRITICAL: Fix for increasing PHY signal drive strength for
601 * TX lockup issue. On DaVinci EVM, the Intel LXT971 PHY
602 * signal strength was low causing TX to fail randomly. The
603 * fix is to Set bit 11 (Increased MII drive strength) of PHY
604 * register 26 (Digital Config register) on this phy. */
605 control = phy_read(phydev, 26);
606 phy_write(phydev, 26, (control | 0x800));
610 #if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
611 defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
617 #if defined(CONFIG_MTD_PHYSMAP) || \
618 defined(CONFIG_MTD_PHYSMAP_MODULE)
624 #if defined(CONFIG_MTD_NAND_DAVINCI) || \
625 defined(CONFIG_MTD_NAND_DAVINCI_MODULE)
631 static __init void davinci_evm_init(void)
633 struct clk *aemif_clk;
634 struct davinci_soc_info *soc_info = &davinci_soc_info;
636 aemif_clk = clk_get(NULL, "aemif");
637 clk_enable(aemif_clk);
640 if (HAS_NAND || HAS_NOR)
641 pr_warning("WARNING: both IDE and Flash are "
642 "enabled, but they share AEMIF pins.\n"
643 "\tDisable IDE for NAND/NOR support.\n");
644 davinci_cfg_reg(DM644X_HPIEN_DISABLE);
645 davinci_cfg_reg(DM644X_ATAEN);
646 davinci_cfg_reg(DM644X_HDIREN);
647 platform_device_register(&ide_dev);
648 } else if (HAS_NAND || HAS_NOR) {
649 davinci_cfg_reg(DM644X_HPIEN_DISABLE);
650 davinci_cfg_reg(DM644X_ATAEN_DISABLE);
652 /* only one device will be jumpered and detected */
654 platform_device_register(&davinci_evm_nandflash_device);
655 evm_leds[7].default_trigger = "nand-disk";
657 pr_warning("WARNING: both NAND and NOR flash "
658 "are enabled; disable one of them.\n");
660 platform_device_register(&davinci_evm_norflash_device);
663 platform_add_devices(davinci_evm_devices,
664 ARRAY_SIZE(davinci_evm_devices));
667 davinci_setup_mmc(0, &dm6446evm_mmc_config);
669 davinci_serial_init(&uart_config);
671 soc_info->emac_pdata->phy_mask = DM644X_EVM_PHY_MASK;
672 soc_info->emac_pdata->mdio_max_freq = DM644X_EVM_MDIO_FREQUENCY;
674 /* Register the fixup for PHY on DaVinci */
675 phy_register_fixup_for_uid(LXT971_PHY_ID, LXT971_PHY_MASK,
680 static __init void davinci_evm_irq_init(void)
685 MACHINE_START(DAVINCI_EVM, "DaVinci DM644x EVM")
686 /* Maintainer: MontaVista Software <source@mvista.com> */
688 .io_pg_offst = (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc,
689 .boot_params = (DAVINCI_DDR_BASE + 0x100),
690 .map_io = davinci_evm_map_io,
691 .init_irq = davinci_evm_irq_init,
692 .timer = &davinci_timer,
693 .init_machine = davinci_evm_init,