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