/*
* Support for CompuLab EM-x270 platform
*
* Copyright (C) 2007 CompuLab, Ltd.
* Author: Mike Rapoport <mike@compulab.co.il>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/dm9000.h>
#include <linux/rtc-v3020.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/arch/pxa-regs.h>
#include <asm/arch/pxafb.h>
#include <asm/arch/ohci.h>
#include <asm/arch/mmc.h>
#include <asm/arch/bitfield.h>
#include "generic.h"
/* GPIO IRQ usage */
#define EM_X270_MMC_PD (105)
#define EM_X270_ETHIRQ IRQ_GPIO(41)
#define EM_X270_MMC_IRQ IRQ_GPIO(13)
static struct resource em_x270_dm9k_resource[] = {
[0] = {
.start = PXA_CS2_PHYS,
.end = PXA_CS2_PHYS + 3,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = PXA_CS2_PHYS + 8,
.end = PXA_CS2_PHYS + 8 + 0x3f,
.flags = IORESOURCE_MEM,
},
[2] = {
.start = EM_X270_ETHIRQ,
.end = EM_X270_ETHIRQ,
.flags = IORESOURCE_IRQ,
}
};
/* for the moment we limit ourselves to 32bit IO until some
* better IO routines can be written and tested
*/
static struct dm9000_plat_data em_x270_dm9k_platdata = {
.flags = DM9000_PLATF_32BITONLY,
};
/* Ethernet device */
static struct platform_device em_x270_dm9k = {
.name = "dm9000",
.id = 0,
.num_resources = ARRAY_SIZE(em_x270_dm9k_resource),
.resource = em_x270_dm9k_resource,
.dev = {
.platform_data = &em_x270_dm9k_platdata,
}
};
/* audio device */
static struct platform_device em_x270_audio = {
.name = "pxa2xx-ac97",
.id = -1,
};
/* WM9712 touchscreen controller. Hopefully the driver will make it to
* the mainstream sometime */
static struct platform_device em_x270_ts = {
.name = "wm97xx-ts",
.id = -1,
};
/* RTC */
static struct resource em_x270_v3020_resource[] = {
[0] = {
.start = PXA_CS4_PHYS,
.end = PXA_CS4_PHYS + 3,
.flags = IORESOURCE_MEM,
},
};
static struct v3020_platform_data em_x270_v3020_platdata = {
.leftshift = 0,
};
static struct platform_device em_x270_rtc = {
.name = "v3020",
.num_resources = ARRAY_SIZE(em_x270_v3020_resource),
.resource = em_x270_v3020_resource,
.id = -1,
.dev = {
.platform_data = &em_x270_v3020_platdata,
}
};
/* NAND flash */
#define GPIO_NAND_CS (11)
#define GPIO_NAND_RB (56)
static inline void nand_cs_on(void)
{
GPCR(GPIO_NAND_CS) = GPIO_bit(GPIO_NAND_CS);
}
static void nand_cs_off(void)
{
dsb();
GPSR(GPIO_NAND_CS) = GPIO_bit(GPIO_NAND_CS);
}
/* hardware specific access to control-lines */
static void em_x270_nand_cmd_ctl(struct mtd_info *mtd, int dat,
unsigned int ctrl)
{
struct nand_chip *this = mtd->priv;
unsigned long nandaddr = (unsigned long)this->IO_ADDR_W;
dsb();
if (ctrl & NAND_CTRL_CHANGE) {
if (ctrl & NAND_ALE)
nandaddr |= (1 << 3);
else
nandaddr &= ~(1 << 3);
if (ctrl & NAND_CLE)
nandaddr |= (1 << 2);
else
nandaddr &= ~(1 << 2);
if (ctrl & NAND_NCE)
nand_cs_on();
else
nand_cs_off();
}
dsb();
this->IO_ADDR_W = (void __iomem *)nandaddr;
if (dat != NAND_CMD_NONE)
writel(dat, this->IO_ADDR_W);
dsb();
}
/* read device ready pin */
static int em_x270_nand_device_ready(struct mtd_info *mtd)
{
dsb();
return GPLR(GPIO_NAND_RB) & GPIO_bit(GPIO_NAND_RB);
}
static struct mtd_partition em_x270_partition_info[] = {
[0] = {
.name = "em_x270-0",
.offset = 0,
.size = SZ_4M,
},
[1] = {
.name = "em_x270-1",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL
},
};
static const char *em_x270_part_probes[] = { "cmdlinepart", NULL };
struct platform_nand_data em_x270_nand_platdata = {
.chip = {
.nr_chips = 1,
.chip_offset = 0,
.nr_partitions = ARRAY_SIZE(em_x270_partition_info),
.partitions = em_x270_partition_info,
.chip_delay = 20,
.part_probe_types = em_x270_part_probes,
},
.ctrl = {
.hwcontrol = 0,
.dev_ready = em_x270_nand_device_ready,
.select_chip = 0,
.cmd_ctrl = em_x270_nand_cmd_ctl,
},
};
static struct resource em_x270_nand_resource[] = {
[0] = {
.start = PXA_CS1_PHYS,
.end = PXA_CS1_PHYS + 12,
.flags = IORESOURCE_MEM,
},
};
static struct platform_device em_x270_nand = {
.name = "gen_nand",
.num_resources = ARRAY_SIZE(em_x270_nand_resource),
.resource = em_x270_nand_resource,
.id = -1,
.dev = {
.platform_data = &em_x270_nand_platdata,
}
};
/* platform devices */
static struct platform_device *platform_devices[] __initdata = {
&em_x270_dm9k,
&em_x270_audio,
&em_x270_ts,
&em_x270_rtc,
&em_x270_nand,
};
/* PXA27x OHCI controller setup */
static int em_x270_ohci_init(struct device *dev)
{
/* Set the Power Control Polarity Low */
UHCHR = (UHCHR | UHCHR_PCPL) &
~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSE);
/* enable port 2 transiever */
UP2OCR = UP2OCR_HXS | UP2OCR_HXOE;
return 0;
}
static struct pxaohci_platform_data em_x270_ohci_platform_data = {
.port_mode = PMM_PERPORT_MODE,
.init = em_x270_ohci_init,
};
static int em_x270_mci_init(struct device *dev,
irq_handler_t em_x270_detect_int,
void *data)
{
int err;
/* setup GPIO for PXA27x MMC controller */
pxa_gpio_mode(GPIO32_MMCCLK_MD);
pxa_gpio_mode(GPIO112_MMCCMD_MD);
pxa_gpio_mode(GPIO92_MMCDAT0_MD);
pxa_gpio_mode(GPIO109_MMCDAT1_MD);
pxa_gpio_mode(GPIO110_MMCDAT2_MD);
pxa_gpio_mode(GPIO111_MMCDAT3_MD);
/* EM-X270 uses GPIO13 as SD power enable */
pxa_gpio_mode(EM_X270_MMC_PD | GPIO_OUT);
err = request_irq(EM_X270_MMC_IRQ, em_x270_detect_int,
IRQF_DISABLED | IRQF_TRIGGER_FALLING,
"MMC card detect", data);
if (err) {
printk(KERN_ERR "%s: can't request MMC card detect IRQ: %d\n",
__FUNCTION__, err);
return err;
}
return 0;
}
static void em_x270_mci_setpower(struct device *dev, unsigned int vdd)
{
/*
FIXME: current hardware implementation does not allow to
enable/disable MMC power. This will be fixed in next HW releases,
and we'll need to add implmentation here.
*/
return;
}
static void em_x270_mci_exit(struct device *dev, void *data)
{
free_irq(EM_X270_MMC_IRQ, data);
}
static struct pxamci_platform_data em_x270_mci_platform_data = {
.ocr_mask = MMC_VDD_28_29|MMC_VDD_29_30|MMC_VDD_30_31,
.init = em_x270_mci_init,
.setpower = em_x270_mci_setpower,
.exit = em_x270_mci_exit,
};
/* LCD 480x640 */
static struct pxafb_mode_info em_x270_lcd_mode = {
.pixclock = 50000,
.bpp = 16,
.xres = 480,
.yres = 640,
.hsync_len = 8,
.vsync_len = 2,
.left_margin = 8,
.upper_margin = 0,
.right_margin = 24,
.lower_margin = 4,
.cmap_greyscale = 0,
};
static struct pxafb_mach_info em_x270_lcd = {
.modes = &em_x270_lcd_mode,
.num_modes = 1,
.cmap_inverse = 0,
.cmap_static = 0,
.lccr0 = LCCR0_PAS,
.lccr3 = LCCR3_PixClkDiv(0x01) | LCCR3_Acb(0xff),
};
static void __init em_x270_init(void)
{
/* setup LCD */
set_pxa_fb_info(&em_x270_lcd);
/* register EM-X270 platform devices */
platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
/* set MCI and OHCI platform parameters */
pxa_set_mci_info(&em_x270_mci_platform_data);
pxa_set_ohci_info(&em_x270_ohci_platform_data);
/* setup STUART GPIOs */
pxa_gpio_mode(GPIO46_STRXD_MD);
pxa_gpio_mode(GPIO47_STTXD_MD);
/* setup BTUART GPIOs */
pxa_gpio_mode(GPIO42_BTRXD_MD);
pxa_gpio_mode(GPIO43_BTTXD_MD);
pxa_gpio_mode(GPIO44_BTCTS_MD);
pxa_gpio_mode(GPIO45_BTRTS_MD);
/* Setup interrupt for dm9000 */
set_irq_type(EM_X270_ETHIRQ, IRQT_RISING);
}
MACHINE_START(EM_X270, "Compulab EM-x270")
.boot_params = 0xa0000100,
.phys_io = 0x40000000,
.io_pg_offst = (io_p2v(0x40000000) >> 18) & 0xfffc,
.map_io = pxa_map_io,
.init_irq = pxa27x_init_irq,
.timer = &pxa_timer,
.init_machine = em_x270_init,
MACHINE_END
