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authorAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
committerAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
commitb4b6116a13633898cf868f2f103c96a90c4c20f8 (patch)
tree93d1b7e2cfcdf473d8d4ff3ad141fa864f8491f6 /arch/arm/mach-ep93xx/ts72xx.c
parentedd4be777c953e5faafc80d091d3084b4343f5d3 (diff)
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fedora kernel: d9aad82f3319f3cfd1aebc01234254ef0c37ad84v3.3.2-1
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/arm/mach-ep93xx/ts72xx.c')
-rw-r--r--arch/arm/mach-ep93xx/ts72xx.c255
1 files changed, 255 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/ts72xx.c b/arch/arm/mach-ep93xx/ts72xx.c
new file mode 100644
index 00000000000..79f8ecf07a1
--- /dev/null
+++ b/arch/arm/mach-ep93xx/ts72xx.c
@@ -0,0 +1,255 @@
+/*
+ * arch/arm/mach-ep93xx/ts72xx.c
+ * Technologic Systems TS72xx SBC support.
+ *
+ * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/m48t86.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+
+#include <mach/hardware.h>
+#include <mach/ts72xx.h>
+
+#include <asm/hardware/vic.h>
+#include <asm/mach-types.h>
+#include <asm/mach/map.h>
+#include <asm/mach/arch.h>
+
+
+static struct map_desc ts72xx_io_desc[] __initdata = {
+ {
+ .virtual = TS72XX_MODEL_VIRT_BASE,
+ .pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
+ .length = TS72XX_MODEL_SIZE,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = TS72XX_OPTIONS_VIRT_BASE,
+ .pfn = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
+ .length = TS72XX_OPTIONS_SIZE,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = TS72XX_OPTIONS2_VIRT_BASE,
+ .pfn = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
+ .length = TS72XX_OPTIONS2_SIZE,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = TS72XX_RTC_INDEX_VIRT_BASE,
+ .pfn = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
+ .length = TS72XX_RTC_INDEX_SIZE,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = TS72XX_RTC_DATA_VIRT_BASE,
+ .pfn = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
+ .length = TS72XX_RTC_DATA_SIZE,
+ .type = MT_DEVICE,
+ }
+};
+
+static void __init ts72xx_map_io(void)
+{
+ ep93xx_map_io();
+ iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
+}
+
+
+/*************************************************************************
+ * NAND flash
+ *************************************************************************/
+#define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */
+#define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */
+
+static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
+ int cmd, unsigned int ctrl)
+{
+ struct nand_chip *chip = mtd->priv;
+
+ if (ctrl & NAND_CTRL_CHANGE) {
+ void __iomem *addr = chip->IO_ADDR_R;
+ unsigned char bits;
+
+ addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
+
+ bits = __raw_readb(addr) & ~0x07;
+ bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
+ bits |= (ctrl & NAND_CLE); /* bit 1 -> bit 1 */
+ bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
+
+ __raw_writeb(bits, addr);
+ }
+
+ if (cmd != NAND_CMD_NONE)
+ __raw_writeb(cmd, chip->IO_ADDR_W);
+}
+
+static int ts72xx_nand_device_ready(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+ void __iomem *addr = chip->IO_ADDR_R;
+
+ addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
+
+ return !!(__raw_readb(addr) & 0x20);
+}
+
+static const char *ts72xx_nand_part_probes[] = { "cmdlinepart", NULL };
+
+#define TS72XX_BOOTROM_PART_SIZE (SZ_16K)
+#define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M)
+
+static struct mtd_partition ts72xx_nand_parts[] = {
+ {
+ .name = "TS-BOOTROM",
+ .offset = 0,
+ .size = TS72XX_BOOTROM_PART_SIZE,
+ .mask_flags = MTD_WRITEABLE, /* force read-only */
+ }, {
+ .name = "Linux",
+ .offset = MTDPART_OFS_RETAIN,
+ .size = TS72XX_REDBOOT_PART_SIZE,
+ /* leave so much for last partition */
+ }, {
+ .name = "RedBoot",
+ .offset = MTDPART_OFS_APPEND,
+ .size = MTDPART_SIZ_FULL,
+ .mask_flags = MTD_WRITEABLE, /* force read-only */
+ },
+};
+
+static struct platform_nand_data ts72xx_nand_data = {
+ .chip = {
+ .nr_chips = 1,
+ .chip_offset = 0,
+ .chip_delay = 15,
+ .part_probe_types = ts72xx_nand_part_probes,
+ .partitions = ts72xx_nand_parts,
+ .nr_partitions = ARRAY_SIZE(ts72xx_nand_parts),
+ },
+ .ctrl = {
+ .cmd_ctrl = ts72xx_nand_hwcontrol,
+ .dev_ready = ts72xx_nand_device_ready,
+ },
+};
+
+static struct resource ts72xx_nand_resource[] = {
+ {
+ .start = 0, /* filled in later */
+ .end = 0, /* filled in later */
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct platform_device ts72xx_nand_flash = {
+ .name = "gen_nand",
+ .id = -1,
+ .dev.platform_data = &ts72xx_nand_data,
+ .resource = ts72xx_nand_resource,
+ .num_resources = ARRAY_SIZE(ts72xx_nand_resource),
+};
+
+
+static void __init ts72xx_register_flash(void)
+{
+ /*
+ * TS7200 has NOR flash all other TS72xx board have NAND flash.
+ */
+ if (board_is_ts7200()) {
+ ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
+ } else {
+ resource_size_t start;
+
+ if (is_ts9420_installed())
+ start = EP93XX_CS7_PHYS_BASE;
+ else
+ start = EP93XX_CS6_PHYS_BASE;
+
+ ts72xx_nand_resource[0].start = start;
+ ts72xx_nand_resource[0].end = start + SZ_16M - 1;
+
+ platform_device_register(&ts72xx_nand_flash);
+ }
+}
+
+
+static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
+{
+ __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
+ return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
+}
+
+static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
+{
+ __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
+ __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
+}
+
+static struct m48t86_ops ts72xx_rtc_ops = {
+ .readbyte = ts72xx_rtc_readbyte,
+ .writebyte = ts72xx_rtc_writebyte,
+};
+
+static struct platform_device ts72xx_rtc_device = {
+ .name = "rtc-m48t86",
+ .id = -1,
+ .dev = {
+ .platform_data = &ts72xx_rtc_ops,
+ },
+ .num_resources = 0,
+};
+
+static struct resource ts72xx_wdt_resources[] = {
+ {
+ .start = TS72XX_WDT_CONTROL_PHYS_BASE,
+ .end = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = TS72XX_WDT_FEED_PHYS_BASE,
+ .end = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct platform_device ts72xx_wdt_device = {
+ .name = "ts72xx-wdt",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(ts72xx_wdt_resources),
+ .resource = ts72xx_wdt_resources,
+};
+
+static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
+ .phy_id = 1,
+};
+
+static void __init ts72xx_init_machine(void)
+{
+ ep93xx_init_devices();
+ ts72xx_register_flash();
+ platform_device_register(&ts72xx_rtc_device);
+ platform_device_register(&ts72xx_wdt_device);
+
+ ep93xx_register_eth(&ts72xx_eth_data, 1);
+}
+
+MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
+ /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
+ .atag_offset = 0x100,
+ .map_io = ts72xx_map_io,
+ .init_irq = ep93xx_init_irq,
+ .handle_irq = vic_handle_irq,
+ .timer = &ep93xx_timer,
+ .init_machine = ts72xx_init_machine,
+ .restart = ep93xx_restart,
+MACHINE_END