441 lines
10 KiB
C
441 lines
10 KiB
C
/*
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* TI DaVinci EVM board support
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*
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* Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
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*
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* 2007 (c) MontaVista Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/dma-mapping.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <linux/leds.h>
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#include <linux/i2c.h>
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#include <linux/i2c/pcf857x.h>
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#include <linux/i2c/at24.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/physmap.h>
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#include <linux/io.h>
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#include <asm/setup.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/flash.h>
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#include <mach/hardware.h>
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#include <mach/common.h>
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#include <mach/i2c.h>
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/* other misc. init functions */
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void __init davinci_psc_init(void);
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void __init davinci_irq_init(void);
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void __init davinci_map_common_io(void);
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void __init davinci_init_common_hw(void);
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#if defined(CONFIG_MTD_PHYSMAP) || \
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defined(CONFIG_MTD_PHYSMAP_MODULE)
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static struct mtd_partition davinci_evm_norflash_partitions[] = {
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/* bootloader (U-Boot, etc) in first 4 sectors */
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{
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.name = "bootloader",
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.offset = 0,
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.size = 4 * SZ_64K,
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.mask_flags = MTD_WRITEABLE, /* force read-only */
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},
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/* bootloader params in the next 1 sectors */
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{
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.name = "params",
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.offset = MTDPART_OFS_APPEND,
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.size = SZ_64K,
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.mask_flags = 0,
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},
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/* kernel */
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{
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.name = "kernel",
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.offset = MTDPART_OFS_APPEND,
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.size = SZ_2M,
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.mask_flags = 0
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},
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/* file system */
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{
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.name = "filesystem",
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.offset = MTDPART_OFS_APPEND,
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.size = MTDPART_SIZ_FULL,
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.mask_flags = 0
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}
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};
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static struct physmap_flash_data davinci_evm_norflash_data = {
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.width = 2,
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.parts = davinci_evm_norflash_partitions,
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.nr_parts = ARRAY_SIZE(davinci_evm_norflash_partitions),
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};
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/* NOTE: CFI probe will correctly detect flash part as 32M, but EMIF
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* limits addresses to 16M, so using addresses past 16M will wrap */
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static struct resource davinci_evm_norflash_resource = {
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.start = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE,
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.end = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE + SZ_16M - 1,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device davinci_evm_norflash_device = {
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.name = "physmap-flash",
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.id = 0,
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.dev = {
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.platform_data = &davinci_evm_norflash_data,
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},
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.num_resources = 1,
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.resource = &davinci_evm_norflash_resource,
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};
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#endif
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#if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
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defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
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static struct resource ide_resources[] = {
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{
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.start = DAVINCI_CFC_ATA_BASE,
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.end = DAVINCI_CFC_ATA_BASE + 0x7ff,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = IRQ_IDE,
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.end = IRQ_IDE,
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.flags = IORESOURCE_IRQ,
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},
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};
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static u64 ide_dma_mask = DMA_32BIT_MASK;
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static struct platform_device ide_dev = {
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.name = "palm_bk3710",
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.id = -1,
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.resource = ide_resources,
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.num_resources = ARRAY_SIZE(ide_resources),
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.dev = {
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.dma_mask = &ide_dma_mask,
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.coherent_dma_mask = DMA_32BIT_MASK,
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},
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};
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#endif
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/*----------------------------------------------------------------------*/
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/*
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* I2C GPIO expanders
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*/
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#define PCF_Uxx_BASE(x) (DAVINCI_N_GPIO + ((x) * 8))
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/* U2 -- LEDs */
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static struct gpio_led evm_leds[] = {
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{ .name = "DS8", .active_low = 1,
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.default_trigger = "heartbeat", },
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{ .name = "DS7", .active_low = 1, },
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{ .name = "DS6", .active_low = 1, },
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{ .name = "DS5", .active_low = 1, },
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{ .name = "DS4", .active_low = 1, },
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{ .name = "DS3", .active_low = 1, },
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{ .name = "DS2", .active_low = 1,
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.default_trigger = "mmc0", },
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{ .name = "DS1", .active_low = 1,
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.default_trigger = "ide-disk", },
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};
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static const struct gpio_led_platform_data evm_led_data = {
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.num_leds = ARRAY_SIZE(evm_leds),
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.leds = evm_leds,
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};
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static struct platform_device *evm_led_dev;
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static int
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evm_led_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
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{
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struct gpio_led *leds = evm_leds;
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int status;
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while (ngpio--) {
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leds->gpio = gpio++;
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leds++;
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}
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/* what an extremely annoying way to be forced to handle
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* device unregistration ...
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*/
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evm_led_dev = platform_device_alloc("leds-gpio", 0);
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platform_device_add_data(evm_led_dev,
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&evm_led_data, sizeof evm_led_data);
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evm_led_dev->dev.parent = &client->dev;
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status = platform_device_add(evm_led_dev);
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if (status < 0) {
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platform_device_put(evm_led_dev);
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evm_led_dev = NULL;
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}
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return status;
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}
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static int
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evm_led_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
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{
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if (evm_led_dev) {
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platform_device_unregister(evm_led_dev);
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evm_led_dev = NULL;
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}
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return 0;
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}
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static struct pcf857x_platform_data pcf_data_u2 = {
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.gpio_base = PCF_Uxx_BASE(0),
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.setup = evm_led_setup,
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.teardown = evm_led_teardown,
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};
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/* U18 - A/V clock generator and user switch */
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static int sw_gpio;
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static ssize_t
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sw_show(struct device *d, struct device_attribute *a, char *buf)
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{
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char *s = gpio_get_value_cansleep(sw_gpio) ? "on\n" : "off\n";
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strcpy(buf, s);
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return strlen(s);
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}
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static DEVICE_ATTR(user_sw, S_IRUGO, sw_show, NULL);
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static int
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evm_u18_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
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{
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int status;
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/* export dip switch option */
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sw_gpio = gpio + 7;
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status = gpio_request(sw_gpio, "user_sw");
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if (status == 0)
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status = gpio_direction_input(sw_gpio);
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if (status == 0)
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status = device_create_file(&client->dev, &dev_attr_user_sw);
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else
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gpio_free(sw_gpio);
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if (status != 0)
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sw_gpio = -EINVAL;
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/* audio PLL: 48 kHz (vs 44.1 or 32), single rate (vs double) */
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gpio_request(gpio + 3, "pll_fs2");
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gpio_direction_output(gpio + 3, 0);
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gpio_request(gpio + 2, "pll_fs1");
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gpio_direction_output(gpio + 2, 0);
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gpio_request(gpio + 1, "pll_sr");
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gpio_direction_output(gpio + 1, 0);
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return 0;
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}
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static int
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evm_u18_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
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{
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gpio_free(gpio + 1);
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gpio_free(gpio + 2);
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gpio_free(gpio + 3);
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if (sw_gpio > 0) {
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device_remove_file(&client->dev, &dev_attr_user_sw);
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gpio_free(sw_gpio);
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}
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return 0;
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}
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static struct pcf857x_platform_data pcf_data_u18 = {
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.gpio_base = PCF_Uxx_BASE(1),
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.n_latch = (1 << 3) | (1 << 2) | (1 << 1),
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.setup = evm_u18_setup,
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.teardown = evm_u18_teardown,
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};
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/* U35 - various I/O signals used to manage USB, CF, ATA, etc */
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static int
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evm_u35_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
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{
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/* p0 = nDRV_VBUS (initial: don't supply it) */
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gpio_request(gpio + 0, "nDRV_VBUS");
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gpio_direction_output(gpio + 0, 1);
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/* p1 = VDDIMX_EN */
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gpio_request(gpio + 1, "VDDIMX_EN");
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gpio_direction_output(gpio + 1, 1);
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/* p2 = VLYNQ_EN */
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gpio_request(gpio + 2, "VLYNQ_EN");
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gpio_direction_output(gpio + 2, 1);
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/* p3 = n3V3_CF_RESET (initial: stay in reset) */
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gpio_request(gpio + 3, "nCF_RESET");
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gpio_direction_output(gpio + 3, 0);
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/* (p4 unused) */
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/* p5 = 1V8_WLAN_RESET (initial: stay in reset) */
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gpio_request(gpio + 5, "WLAN_RESET");
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gpio_direction_output(gpio + 5, 1);
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/* p6 = nATA_SEL (initial: select) */
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gpio_request(gpio + 6, "nATA_SEL");
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gpio_direction_output(gpio + 6, 0);
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/* p7 = nCF_SEL (initial: deselect) */
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gpio_request(gpio + 7, "nCF_SEL");
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gpio_direction_output(gpio + 7, 1);
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return 0;
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}
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static int
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evm_u35_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
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{
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gpio_free(gpio + 7);
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gpio_free(gpio + 6);
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gpio_free(gpio + 5);
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gpio_free(gpio + 3);
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gpio_free(gpio + 2);
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gpio_free(gpio + 1);
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gpio_free(gpio + 0);
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return 0;
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}
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static struct pcf857x_platform_data pcf_data_u35 = {
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.gpio_base = PCF_Uxx_BASE(2),
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.setup = evm_u35_setup,
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.teardown = evm_u35_teardown,
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};
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/*----------------------------------------------------------------------*/
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/* Most of this EEPROM is unused, but U-Boot uses some data:
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* - 0x7f00, 6 bytes Ethernet Address
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* - 0x0039, 1 byte NTSC vs PAL (bit 0x80 == PAL)
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* - ... newer boards may have more
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*/
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static struct at24_platform_data eeprom_info = {
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.byte_len = (256*1024) / 8,
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.page_size = 64,
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.flags = AT24_FLAG_ADDR16,
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};
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static struct i2c_board_info __initdata i2c_info[] = {
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{
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I2C_BOARD_INFO("pcf8574", 0x38),
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.platform_data = &pcf_data_u2,
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},
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{
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I2C_BOARD_INFO("pcf8574", 0x39),
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.platform_data = &pcf_data_u18,
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},
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{
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I2C_BOARD_INFO("pcf8574", 0x3a),
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.platform_data = &pcf_data_u35,
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},
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{
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I2C_BOARD_INFO("24c256", 0x50),
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.platform_data = &eeprom_info,
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},
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/* ALSO:
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* - tvl320aic33 audio codec (0x1b)
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* - msp430 microcontroller (0x23)
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* - tvp5146 video decoder (0x5d)
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*/
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};
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/* The msp430 uses a slow bitbanged I2C implementation (ergo 20 KHz),
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* which requires 100 usec of idle bus after i2c writes sent to it.
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*/
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static struct davinci_i2c_platform_data i2c_pdata = {
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.bus_freq = 20 /* kHz */,
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.bus_delay = 100 /* usec */,
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};
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static void __init evm_init_i2c(void)
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{
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davinci_init_i2c(&i2c_pdata);
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i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));
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}
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static struct platform_device *davinci_evm_devices[] __initdata = {
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#if defined(CONFIG_MTD_PHYSMAP) || \
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defined(CONFIG_MTD_PHYSMAP_MODULE)
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&davinci_evm_norflash_device,
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#endif
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#if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
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defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
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&ide_dev,
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#endif
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};
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static void __init
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davinci_evm_map_io(void)
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{
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davinci_map_common_io();
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}
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static __init void davinci_evm_init(void)
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{
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davinci_psc_init();
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#if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
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defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
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#if defined(CONFIG_MTD_PHYSMAP) || \
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defined(CONFIG_MTD_PHYSMAP_MODULE)
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printk(KERN_WARNING "WARNING: both IDE and NOR flash are enabled, "
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"but share pins.\n\t Disable IDE for NOR support.\n");
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#endif
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#endif
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platform_add_devices(davinci_evm_devices,
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ARRAY_SIZE(davinci_evm_devices));
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evm_init_i2c();
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/* irlml6401 sustains over 3A, switches 5V in under 8 msec */
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setup_usb(500, 8);
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}
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static __init void davinci_evm_irq_init(void)
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{
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davinci_init_common_hw();
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davinci_irq_init();
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}
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MACHINE_START(DAVINCI_EVM, "DaVinci EVM")
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/* Maintainer: MontaVista Software <source@mvista.com> */
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.phys_io = IO_PHYS,
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.io_pg_offst = (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc,
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.boot_params = (DAVINCI_DDR_BASE + 0x100),
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.map_io = davinci_evm_map_io,
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.init_irq = davinci_evm_irq_init,
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.timer = &davinci_timer,
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.init_machine = davinci_evm_init,
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MACHINE_END
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