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linux/arch/arm/mach-mx5/board-cpuimx51.c
Shawn Guo b78d8e59a6 gpio/mxc: Change gpio-mxc into an upstanding gpio driver 
The patch makes necessary changes on gpio-mxc as below to turn it
into an upstanding gpio driver.

 * Add a list to save all mx2 ports references, so that
   mx2_gpio_irq_handler can walk through all interrupt status
   registers

 * Use readl/writel to replace mach-specific accessors
   __raw_readl/__raw_writel

 * Change mxc_gpio_init into mxc_gpio_probe function

 * Move "struct mxc_gpio_port" into gpio-mxc.c, as it needs not to
   be public at all, and also make some other cleanup on
   plat-mxc/include/mach/gpio.h at the same time

And the patch then migrates mach-imx and mach-mx5 to the updated
driver by adding corresponding platform devices.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-06 10:01:19 -06:00

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/*
*
* Copyright (C) 2010 Eric Bénard <eric@eukrea.com>
*
* based on board-mx51_babbage.c which is
* Copyright 2009 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/serial_8250.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <mach/eukrea-baseboards.h>
#include <mach/common.h>
#include <mach/hardware.h>
#include <mach/iomux-mx51.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"
#define CPUIMX51_USBH1_STP IMX_GPIO_NR(1, 27)
#define CPUIMX51_QUARTA_GPIO IMX_GPIO_NR(3, 28)
#define CPUIMX51_QUARTB_GPIO IMX_GPIO_NR(3, 25)
#define CPUIMX51_QUARTC_GPIO IMX_GPIO_NR(3, 26)
#define CPUIMX51_QUARTD_GPIO IMX_GPIO_NR(3, 27)
#define CPUIMX51_QUARTA_IRQ (MXC_INTERNAL_IRQS + CPUIMX51_QUARTA_GPIO)
#define CPUIMX51_QUARTB_IRQ (MXC_INTERNAL_IRQS + CPUIMX51_QUARTB_GPIO)
#define CPUIMX51_QUARTC_IRQ (MXC_INTERNAL_IRQS + CPUIMX51_QUARTC_GPIO)
#define CPUIMX51_QUARTD_IRQ (MXC_INTERNAL_IRQS + CPUIMX51_QUARTD_GPIO)
#define CPUIMX51_QUART_XTAL 14745600
#define CPUIMX51_QUART_REGSHIFT 17
/* 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 plat_serial8250_port serial_platform_data[] = {
{
.mapbase = (unsigned long)(MX51_CS1_BASE_ADDR + 0x400000),
.irq = CPUIMX51_QUARTA_IRQ,
.irqflags = IRQF_TRIGGER_HIGH,
.uartclk = CPUIMX51_QUART_XTAL,
.regshift = CPUIMX51_QUART_REGSHIFT,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP,
}, {
.mapbase = (unsigned long)(MX51_CS1_BASE_ADDR + 0x800000),
.irq = CPUIMX51_QUARTB_IRQ,
.irqflags = IRQF_TRIGGER_HIGH,
.uartclk = CPUIMX51_QUART_XTAL,
.regshift = CPUIMX51_QUART_REGSHIFT,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP,
}, {
.mapbase = (unsigned long)(MX51_CS1_BASE_ADDR + 0x1000000),
.irq = CPUIMX51_QUARTC_IRQ,
.irqflags = IRQF_TRIGGER_HIGH,
.uartclk = CPUIMX51_QUART_XTAL,
.regshift = CPUIMX51_QUART_REGSHIFT,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP,
}, {
.mapbase = (unsigned long)(MX51_CS1_BASE_ADDR + 0x2000000),
.irq = CPUIMX51_QUARTD_IRQ,
.irqflags = IRQF_TRIGGER_HIGH,
.uartclk = CPUIMX51_QUART_XTAL,
.regshift = CPUIMX51_QUART_REGSHIFT,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP,
}, {
}
};
static struct platform_device serial_device = {
.name = "serial8250",
.id = 0,
.dev = {
.platform_data = serial_platform_data,
},
};
static struct platform_device *devices[] __initdata = {
&serial_device,
};
static iomux_v3_cfg_t eukrea_cpuimx51_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,
/* I2C2 */
MX51_PAD_GPIO1_2__I2C2_SCL,
MX51_PAD_GPIO1_3__I2C2_SDA,
MX51_PAD_NANDF_D10__GPIO3_30,
/* QUART IRQ */
MX51_PAD_NANDF_D15__GPIO3_25,
MX51_PAD_NANDF_D14__GPIO3_26,
MX51_PAD_NANDF_D13__GPIO3_27,
MX51_PAD_NANDF_D12__GPIO3_28,
/* 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,
MX51_PAD_USBH1_STP__USBH1_STP,
};
static const struct mxc_nand_platform_data
eukrea_cpuimx51_nand_board_info __initconst = {
.width = 1,
.hw_ecc = 1,
.flash_bbt = 1,
};
static const struct imxuart_platform_data uart_pdata __initconst = {
.flags = IMXUART_HAVE_RTSCTS,
};
static const
struct imxi2c_platform_data eukrea_cpuimx51_i2c_data __initconst = {
.bitrate = 100000,
};
static struct i2c_board_info eukrea_cpuimx51_i2c_devices[] = {
{
I2C_BOARD_INFO("pcf8563", 0x51),
},
};
/* 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);
mdelay(10);
return mx51_initialize_usb_hw(0, MXC_EHCI_INTERNAL_PHY);
}
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);
mdelay(10);
return mx51_initialize_usb_hw(1, MXC_EHCI_POWER_PINS_ENABLED |
MXC_EHCI_ITC_NO_THRESHOLD);
}
static struct mxc_usbh_platform_data dr_utmi_config = {
.init = initialize_otg_port,
.portsc = MXC_EHCI_UTMI_16BIT,
};
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,
};
static int otg_mode_host;
static int __init eukrea_cpuimx51_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=", eukrea_cpuimx51_otg_mode);
/*
* Board specific initialization.
*/
static void __init eukrea_cpuimx51_init(void)
{
imx51_soc_init();
mxc_iomux_v3_setup_multiple_pads(eukrea_cpuimx51_pads,
ARRAY_SIZE(eukrea_cpuimx51_pads));
imx51_add_imx_uart(0, &uart_pdata);
imx51_add_mxc_nand(&eukrea_cpuimx51_nand_board_info);
gpio_request(CPUIMX51_QUARTA_GPIO, "quarta_irq");
gpio_direction_input(CPUIMX51_QUARTA_GPIO);
gpio_free(CPUIMX51_QUARTA_GPIO);
gpio_request(CPUIMX51_QUARTB_GPIO, "quartb_irq");
gpio_direction_input(CPUIMX51_QUARTB_GPIO);
gpio_free(CPUIMX51_QUARTB_GPIO);
gpio_request(CPUIMX51_QUARTC_GPIO, "quartc_irq");
gpio_direction_input(CPUIMX51_QUARTC_GPIO);
gpio_free(CPUIMX51_QUARTC_GPIO);
gpio_request(CPUIMX51_QUARTD_GPIO, "quartd_irq");
gpio_direction_input(CPUIMX51_QUARTD_GPIO);
gpio_free(CPUIMX51_QUARTD_GPIO);
imx51_add_fec(NULL);
platform_add_devices(devices, ARRAY_SIZE(devices));
imx51_add_imx_i2c(1, &eukrea_cpuimx51_i2c_data);
i2c_register_board_info(1, eukrea_cpuimx51_i2c_devices,
ARRAY_SIZE(eukrea_cpuimx51_i2c_devices));
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);
}
mxc_register_device(&mxc_usbh1_device, &usbh1_config);
#ifdef CONFIG_MACH_EUKREA_MBIMX51_BASEBOARD
eukrea_mbimx51_baseboard_init();
#endif
}
static void __init eukrea_cpuimx51_timer_init(void)
{
mx51_clocks_init(32768, 24000000, 22579200, 0);
}
static struct sys_timer mxc_timer = {
.init = eukrea_cpuimx51_timer_init,
};
MACHINE_START(EUKREA_CPUIMX51, "Eukrea CPUIMX51 Module")
/* Maintainer: Eric Bénard <eric@eukrea.com> */
.boot_params = MX51_PHYS_OFFSET + 0x100,
.map_io = mx51_map_io,
.init_early = imx51_init_early,
.init_irq = mx51_init_irq,
.timer = &mxc_timer,
.init_machine = eukrea_cpuimx51_init,
MACHINE_END
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