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linux-stable/arch/arm/mach-mx5/board-mx51_babbage.c
Sascha Hauer ee1ae4d7b1 ARM i.MX51: Full iomux support 
This iomux file has been constructed from the Freescale pinmux tool.
It contains all pins from the tool, but the datasheet lists some
configurations not present in the tool, these are not yet added.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2010-12-15 14:42:23 +01:00

413 lines
11 KiB
C
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/*
* Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria@canonical.com>
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/fsl_devices.h>
#include <linux/fec.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>
#include <linux/spi/flash.h>
#include <linux/spi/spi.h>
#include <mach/common.h>
#include <mach/hardware.h>
#include <mach/iomux-mx51.h>
#include <mach/mxc_ehci.h>
#include <asm/irq.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include "devices-imx51.h"
#include "devices.h"
#include "cpu_op-mx51.h"
#define BABBAGE_USB_HUB_RESET IMX_GPIO_NR(1, 7)
#define BABBAGE_USBH1_STP IMX_GPIO_NR(1, 27)
#define BABBAGE_PHY_RESET IMX_GPIO_NR(2, 5)
#define BABBAGE_FEC_PHY_RESET IMX_GPIO_NR(2, 14)
#define BABBAGE_POWER_KEY IMX_GPIO_NR(2, 21)
#define BABBAGE_ECSPI1_CS0 IMX_GPIO_NR(4, 24)
#define BABBAGE_ECSPI1_CS1 IMX_GPIO_NR(4, 25)
/* USB_CTRL_1 */
#define MX51_USB_CTRL_1_OFFSET 0x10
#define MX51_USB_CTRL_UH1_EXT_CLK_EN (1 << 25)
#define MX51_USB_PLLDIV_12_MHZ 0x00
#define MX51_USB_PLL_DIV_19_2_MHZ 0x01
#define MX51_USB_PLL_DIV_24_MHZ 0x02
static struct gpio_keys_button babbage_buttons[] = {
{
.gpio = BABBAGE_POWER_KEY,
.code = BTN_0,
.desc = "PWR",
.active_low = 1,
.wakeup = 1,
},
};
static const struct gpio_keys_platform_data imx_button_data __initconst = {
.buttons = babbage_buttons,
.nbuttons = ARRAY_SIZE(babbage_buttons),
};
static iomux_v3_cfg_t mx51babbage_pads[] = {
/* UART1 */
MX51_PAD_UART1_RXD__UART1_RXD,
MX51_PAD_UART1_TXD__UART1_TXD,
MX51_PAD_UART1_RTS__UART1_RTS,
MX51_PAD_UART1_CTS__UART1_CTS,
/* UART2 */
MX51_PAD_UART2_RXD__UART2_RXD,
MX51_PAD_UART2_TXD__UART2_TXD,
/* UART3 */
MX51_PAD_EIM_D25__UART3_RXD,
MX51_PAD_EIM_D26__UART3_TXD,
MX51_PAD_EIM_D27__UART3_RTS,
MX51_PAD_EIM_D24__UART3_CTS,
/* I2C1 */
MX51_PAD_EIM_D16__I2C1_SDA,
MX51_PAD_EIM_D19__I2C1_SCL,
/* I2C2 */
MX51_PAD_KEY_COL4__I2C2_SCL,
MX51_PAD_KEY_COL5__I2C2_SDA,
/* HSI2C */
MX51_PAD_I2C1_CLK__I2C1_CLK,
MX51_PAD_I2C1_DAT__I2C1_DAT,
/* USB HOST1 */
MX51_PAD_USBH1_CLK__USBH1_CLK,
MX51_PAD_USBH1_DIR__USBH1_DIR,
MX51_PAD_USBH1_NXT__USBH1_NXT,
MX51_PAD_USBH1_DATA0__USBH1_DATA0,
MX51_PAD_USBH1_DATA1__USBH1_DATA1,
MX51_PAD_USBH1_DATA2__USBH1_DATA2,
MX51_PAD_USBH1_DATA3__USBH1_DATA3,
MX51_PAD_USBH1_DATA4__USBH1_DATA4,
MX51_PAD_USBH1_DATA5__USBH1_DATA5,
MX51_PAD_USBH1_DATA6__USBH1_DATA6,
MX51_PAD_USBH1_DATA7__USBH1_DATA7,
/* USB HUB reset line*/
MX51_PAD_GPIO1_7__GPIO1_7,
/* FEC */
MX51_PAD_EIM_EB2__FEC_MDIO,
MX51_PAD_EIM_EB3__FEC_RDATA1,
MX51_PAD_EIM_CS2__FEC_RDATA2,
MX51_PAD_EIM_CS3__FEC_RDATA3,
MX51_PAD_EIM_CS4__FEC_RX_ER,
MX51_PAD_EIM_CS5__FEC_CRS,
MX51_PAD_NANDF_RB2__FEC_COL,
MX51_PAD_NANDF_RB3__FEC_RX_CLK,
MX51_PAD_NANDF_D9__FEC_RDATA0,
MX51_PAD_NANDF_D8__FEC_TDATA0,
MX51_PAD_NANDF_CS2__FEC_TX_ER,
MX51_PAD_NANDF_CS3__FEC_MDC,
MX51_PAD_NANDF_CS4__FEC_TDATA1,
MX51_PAD_NANDF_CS5__FEC_TDATA2,
MX51_PAD_NANDF_CS6__FEC_TDATA3,
MX51_PAD_NANDF_CS7__FEC_TX_EN,
MX51_PAD_NANDF_RDY_INT__FEC_TX_CLK,
/* FEC PHY reset line */
MX51_PAD_EIM_A20__GPIO2_14,
/* SD 1 */
MX51_PAD_SD1_CMD__SD1_CMD,
MX51_PAD_SD1_CLK__SD1_CLK,
MX51_PAD_SD1_DATA0__SD1_DATA0,
MX51_PAD_SD1_DATA1__SD1_DATA1,
MX51_PAD_SD1_DATA2__SD1_DATA2,
MX51_PAD_SD1_DATA3__SD1_DATA3,
/* SD 2 */
MX51_PAD_SD2_CMD__SD2_CMD,
MX51_PAD_SD2_CLK__SD2_CLK,
MX51_PAD_SD2_DATA0__SD2_DATA0,
MX51_PAD_SD2_DATA1__SD2_DATA1,
MX51_PAD_SD2_DATA2__SD2_DATA2,
MX51_PAD_SD2_DATA3__SD2_DATA3,
/* eCSPI1 */
MX51_PAD_CSPI1_MISO__ECSPI1_MISO,
MX51_PAD_CSPI1_MOSI__ECSPI1_MOSI,
MX51_PAD_CSPI1_SCLK__ECSPI1_SCLK,
MX51_PAD_CSPI1_SS0__GPIO4_24,
MX51_PAD_CSPI1_SS1__GPIO4_25,
};
/* Serial ports */
#if defined(CONFIG_SERIAL_IMX) || defined(CONFIG_SERIAL_IMX_MODULE)
static const struct imxuart_platform_data uart_pdata __initconst = {
.flags = IMXUART_HAVE_RTSCTS,
};
static inline void mxc_init_imx_uart(void)
{
imx51_add_imx_uart(0, &uart_pdata);
imx51_add_imx_uart(1, &uart_pdata);
imx51_add_imx_uart(2, &uart_pdata);
}
#else /* !SERIAL_IMX */
static inline void mxc_init_imx_uart(void)
{
}
#endif /* SERIAL_IMX */
static const struct imxi2c_platform_data babbage_i2c_data __initconst = {
.bitrate = 100000,
};
static struct imxi2c_platform_data babbage_hsi2c_data = {
.bitrate = 400000,
};
static int gpio_usbh1_active(void)
{
iomux_v3_cfg_t usbh1stp_gpio = MX51_PAD_USBH1_STP__GPIO1_27;
iomux_v3_cfg_t phyreset_gpio = MX51_PAD_EIM_D21__GPIO2_5;
int ret;
/* Set USBH1_STP to GPIO and toggle it */
mxc_iomux_v3_setup_pad(usbh1stp_gpio);
ret = gpio_request(BABBAGE_USBH1_STP, "usbh1_stp");
if (ret) {
pr_debug("failed to get MX51_PAD_USBH1_STP__GPIO_1_27: %d\n", ret);
return ret;
}
gpio_direction_output(BABBAGE_USBH1_STP, 0);
gpio_set_value(BABBAGE_USBH1_STP, 1);
msleep(100);
gpio_free(BABBAGE_USBH1_STP);
/* De-assert USB PHY RESETB */
mxc_iomux_v3_setup_pad(phyreset_gpio);
ret = gpio_request(BABBAGE_PHY_RESET, "phy_reset");
if (ret) {
pr_debug("failed to get MX51_PAD_EIM_D21__GPIO_2_5: %d\n", ret);
return ret;
}
gpio_direction_output(BABBAGE_PHY_RESET, 1);
return 0;
}
static inline void babbage_usbhub_reset(void)
{
int ret;
/* Bring USB hub out of reset */
ret = gpio_request(BABBAGE_USB_HUB_RESET, "GPIO1_7");
if (ret) {
printk(KERN_ERR"failed to get GPIO_USB_HUB_RESET: %d\n", ret);
return;
}
gpio_direction_output(BABBAGE_USB_HUB_RESET, 0);
/* USB HUB RESET - De-assert USB HUB RESET_N */
msleep(1);
gpio_set_value(BABBAGE_USB_HUB_RESET, 0);
msleep(1);
gpio_set_value(BABBAGE_USB_HUB_RESET, 1);
}
static inline void babbage_fec_reset(void)
{
int ret;
/* reset FEC PHY */
ret = gpio_request(BABBAGE_FEC_PHY_RESET, "fec-phy-reset");
if (ret) {
printk(KERN_ERR"failed to get GPIO_FEC_PHY_RESET: %d\n", ret);
return;
}
gpio_direction_output(BABBAGE_FEC_PHY_RESET, 0);
gpio_set_value(BABBAGE_FEC_PHY_RESET, 0);
msleep(1);
gpio_set_value(BABBAGE_FEC_PHY_RESET, 1);
}
/* This function is board specific as the bit mask for the plldiv will also
be different for other Freescale SoCs, thus a common bitmask is not
possible and cannot get place in /plat-mxc/ehci.c.*/
static int initialize_otg_port(struct platform_device *pdev)
{
u32 v;
void __iomem *usb_base;
void __iomem *usbother_base;
usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
if (!usb_base)
return -ENOMEM;
usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
/* Set the PHY clock to 19.2MHz */
v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
v &= ~MX5_USB_UTMI_PHYCTRL1_PLLDIV_MASK;
v |= MX51_USB_PLL_DIV_19_2_MHZ;
__raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
iounmap(usb_base);
return 0;
}
static int initialize_usbh1_port(struct platform_device *pdev)
{
u32 v;
void __iomem *usb_base;
void __iomem *usbother_base;
usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
if (!usb_base)
return -ENOMEM;
usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
/* The clock for the USBH1 ULPI port will come externally from the PHY. */
v = __raw_readl(usbother_base + MX51_USB_CTRL_1_OFFSET);
__raw_writel(v | MX51_USB_CTRL_UH1_EXT_CLK_EN, usbother_base + MX51_USB_CTRL_1_OFFSET);
iounmap(usb_base);
return 0;
}
static struct mxc_usbh_platform_data dr_utmi_config = {
.init = initialize_otg_port,
.portsc = MXC_EHCI_UTMI_16BIT,
.flags = MXC_EHCI_INTERNAL_PHY,
};
static struct fsl_usb2_platform_data usb_pdata = {
.operating_mode = FSL_USB2_DR_DEVICE,
.phy_mode = FSL_USB2_PHY_UTMI_WIDE,
};
static struct mxc_usbh_platform_data usbh1_config = {
.init = initialize_usbh1_port,
.portsc = MXC_EHCI_MODE_ULPI,
.flags = (MXC_EHCI_POWER_PINS_ENABLED | MXC_EHCI_ITC_NO_THRESHOLD),
};
static int otg_mode_host;
static int __init babbage_otg_mode(char *options)
{
if (!strcmp(options, "host"))
otg_mode_host = 1;
else if (!strcmp(options, "device"))
otg_mode_host = 0;
else
pr_info("otg_mode neither \"host\" nor \"device\". "
"Defaulting to device\n");
return 0;
}
__setup("otg_mode=", babbage_otg_mode);
static struct spi_board_info mx51_babbage_spi_board_info[] __initdata = {
{
.modalias = "mtd_dataflash",
.max_speed_hz = 25000000,
.bus_num = 0,
.chip_select = 1,
.mode = SPI_MODE_0,
.platform_data = NULL,
},
};
static int mx51_babbage_spi_cs[] = {
BABBAGE_ECSPI1_CS0,
BABBAGE_ECSPI1_CS1,
};
static const struct spi_imx_master mx51_babbage_spi_pdata __initconst = {
.chipselect = mx51_babbage_spi_cs,
.num_chipselect = ARRAY_SIZE(mx51_babbage_spi_cs),
};
/*
* Board specific initialization.
*/
static void __init mxc_board_init(void)
{
iomux_v3_cfg_t usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP;
iomux_v3_cfg_t power_key = _MX51_PAD_EIM_A27__GPIO2_21 |
MUX_PAD_CTRL(PAD_CTL_SRE_FAST | PAD_CTL_DSE_HIGH | PAD_CTL_PUS_100K_UP);
#if defined(CONFIG_CPU_FREQ_IMX)
get_cpu_op = mx51_get_cpu_op;
#endif
mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads,
ARRAY_SIZE(mx51babbage_pads));
mxc_init_imx_uart();
babbage_fec_reset();
imx51_add_fec(NULL);
/* Set the PAD settings for the pwr key. */
mxc_iomux_v3_setup_pad(power_key);
imx51_add_gpio_keys(&imx_button_data);
imx51_add_imx_i2c(0, &babbage_i2c_data);
imx51_add_imx_i2c(1, &babbage_i2c_data);
mxc_register_device(&mxc_hsi2c_device, &babbage_hsi2c_data);
if (otg_mode_host)
mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);
else {
initialize_otg_port(NULL);
mxc_register_device(&mxc_usbdr_udc_device, &usb_pdata);
}
gpio_usbh1_active();
mxc_register_device(&mxc_usbh1_device, &usbh1_config);
/* setback USBH1_STP to be function */
mxc_iomux_v3_setup_pad(usbh1stp);
babbage_usbhub_reset();
imx51_add_sdhci_esdhc_imx(0, NULL);
imx51_add_sdhci_esdhc_imx(1, NULL);
spi_register_board_info(mx51_babbage_spi_board_info,
ARRAY_SIZE(mx51_babbage_spi_board_info));
imx51_add_ecspi(0, &mx51_babbage_spi_pdata);
imx51_add_imx2_wdt(0, NULL);
}
static void __init mx51_babbage_timer_init(void)
{
mx51_clocks_init(32768, 24000000, 22579200, 0);
}
static struct sys_timer mxc_timer = {
.init = mx51_babbage_timer_init,
};
MACHINE_START(MX51_BABBAGE, "Freescale MX51 Babbage Board")
/* Maintainer: Amit Kucheria <amit.kucheria@canonical.com> */
.boot_params = MX51_PHYS_OFFSET + 0x100,
.map_io = mx51_map_io,
.init_irq = mx51_init_irq,
.init_machine = mxc_board_init,
.timer = &mxc_timer,
MACHINE_END
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