Fixed MTP to work with TWRP

drivers/ssb/pcmcia.c

@@ -0,0 +1,842 @@
+/*
+ * Sonics Silicon Backplane
+ * PCMCIA-Hostbus related functions
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2007-2008 Michael Buesch <m@bues.ch>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include <linux/ssb/ssb.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/etherdevice.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ciscode.h>
+#include <pcmcia/ds.h>
+#include <pcmcia/cisreg.h>
+
+#include "ssb_private.h"
+
+
+/* Define the following to 1 to enable a printk on each coreswitch. */
+#define SSB_VERBOSE_PCMCIACORESWITCH_DEBUG		0
+
+
+/* PCMCIA configuration registers */
+#define SSB_PCMCIA_ADDRESS0		0x2E
+#define SSB_PCMCIA_ADDRESS1		0x30
+#define SSB_PCMCIA_ADDRESS2		0x32
+#define SSB_PCMCIA_MEMSEG		0x34
+#define SSB_PCMCIA_SPROMCTL		0x36
+#define  SSB_PCMCIA_SPROMCTL_IDLE	0
+#define  SSB_PCMCIA_SPROMCTL_WRITE	1
+#define  SSB_PCMCIA_SPROMCTL_READ	2
+#define  SSB_PCMCIA_SPROMCTL_WRITEEN	4
+#define  SSB_PCMCIA_SPROMCTL_WRITEDIS	7
+#define  SSB_PCMCIA_SPROMCTL_DONE	8
+#define SSB_PCMCIA_SPROM_DATALO		0x38
+#define SSB_PCMCIA_SPROM_DATAHI		0x3A
+#define SSB_PCMCIA_SPROM_ADDRLO		0x3C
+#define SSB_PCMCIA_SPROM_ADDRHI		0x3E
+
+/* Hardware invariants CIS tuples */
+#define SSB_PCMCIA_CIS			0x80
+#define  SSB_PCMCIA_CIS_ID		0x01
+#define  SSB_PCMCIA_CIS_BOARDREV	0x02
+#define  SSB_PCMCIA_CIS_PA		0x03
+#define   SSB_PCMCIA_CIS_PA_PA0B0_LO	0
+#define   SSB_PCMCIA_CIS_PA_PA0B0_HI	1
+#define   SSB_PCMCIA_CIS_PA_PA0B1_LO	2
+#define   SSB_PCMCIA_CIS_PA_PA0B1_HI	3
+#define   SSB_PCMCIA_CIS_PA_PA0B2_LO	4
+#define   SSB_PCMCIA_CIS_PA_PA0B2_HI	5
+#define   SSB_PCMCIA_CIS_PA_ITSSI	6
+#define   SSB_PCMCIA_CIS_PA_MAXPOW	7
+#define  SSB_PCMCIA_CIS_OEMNAME		0x04
+#define  SSB_PCMCIA_CIS_CCODE		0x05
+#define  SSB_PCMCIA_CIS_ANTENNA		0x06
+#define  SSB_PCMCIA_CIS_ANTGAIN		0x07
+#define  SSB_PCMCIA_CIS_BFLAGS		0x08
+#define  SSB_PCMCIA_CIS_LEDS		0x09
+
+/* PCMCIA SPROM size. */
+#define SSB_PCMCIA_SPROM_SIZE		256
+#define SSB_PCMCIA_SPROM_SIZE_BYTES	(SSB_PCMCIA_SPROM_SIZE * sizeof(u16))
+
+
+/* Write to a PCMCIA configuration register. */
+static int ssb_pcmcia_cfg_write(struct ssb_bus *bus, u8 offset, u8 value)
+{
+	int res;
+
+	res = pcmcia_write_config_byte(bus->host_pcmcia, offset, value);
+	if (unlikely(res != 0))
+		return -EBUSY;
+
+	return 0;
+}
+
+/* Read from a PCMCIA configuration register. */
+static int ssb_pcmcia_cfg_read(struct ssb_bus *bus, u8 offset, u8 *value)
+{
+	int res;
+
+	res = pcmcia_read_config_byte(bus->host_pcmcia, offset, value);
+	if (unlikely(res != 0))
+		return -EBUSY;
+
+	return 0;
+}
+
+int ssb_pcmcia_switch_coreidx(struct ssb_bus *bus,
+			      u8 coreidx)
+{
+	int err;
+	int attempts = 0;
+	u32 cur_core;
+	u32 addr;
+	u32 read_addr;
+	u8 val;
+
+	addr = (coreidx * SSB_CORE_SIZE) + SSB_ENUM_BASE;
+	while (1) {
+		err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_ADDRESS0,
+					   (addr & 0x0000F000) >> 12);
+		if (err)
+			goto error;
+		err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_ADDRESS1,
+					   (addr & 0x00FF0000) >> 16);
+		if (err)
+			goto error;
+		err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_ADDRESS2,
+					   (addr & 0xFF000000) >> 24);
+		if (err)
+			goto error;
+
+		read_addr = 0;
+
+		err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_ADDRESS0, &val);
+		if (err)
+			goto error;
+		read_addr |= ((u32)(val & 0x0F)) << 12;
+		err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_ADDRESS1, &val);
+		if (err)
+			goto error;
+		read_addr |= ((u32)val) << 16;
+		err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_ADDRESS2, &val);
+		if (err)
+			goto error;
+		read_addr |= ((u32)val) << 24;
+
+		cur_core = (read_addr - SSB_ENUM_BASE) / SSB_CORE_SIZE;
+		if (cur_core == coreidx)
+			break;
+
+		err = -ETIMEDOUT;
+		if (attempts++ > SSB_BAR0_MAX_RETRIES)
+			goto error;
+		udelay(10);
+	}
+
+	return 0;
+error:
+	ssb_err("Failed to switch to core %u\n", coreidx);
+	return err;
+}
+
+int ssb_pcmcia_switch_core(struct ssb_bus *bus,
+			   struct ssb_device *dev)
+{
+	int err;
+
+#if SSB_VERBOSE_PCMCIACORESWITCH_DEBUG
+	ssb_info("Switching to %s core, index %d\n",
+		 ssb_core_name(dev->id.coreid),
+		 dev->core_index);
+#endif
+
+	err = ssb_pcmcia_switch_coreidx(bus, dev->core_index);
+	if (!err)
+		bus->mapped_device = dev;
+
+	return err;
+}
+
+int ssb_pcmcia_switch_segment(struct ssb_bus *bus, u8 seg)
+{
+	int attempts = 0;
+	int err;
+	u8 val;
+
+	SSB_WARN_ON((seg != 0) && (seg != 1));
+	while (1) {
+		err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_MEMSEG, seg);
+		if (err)
+			goto error;
+		err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_MEMSEG, &val);
+		if (err)
+			goto error;
+		if (val == seg)
+			break;
+
+		err = -ETIMEDOUT;
+		if (unlikely(attempts++ > SSB_BAR0_MAX_RETRIES))
+			goto error;
+		udelay(10);
+	}
+	bus->mapped_pcmcia_seg = seg;
+
+	return 0;
+error:
+	ssb_err("Failed to switch pcmcia segment\n");
+	return err;
+}
+
+static int select_core_and_segment(struct ssb_device *dev,
+				   u16 *offset)
+{
+	struct ssb_bus *bus = dev->bus;
+	int err;
+	u8 need_segment;
+
+	if (*offset >= 0x800) {
+		*offset -= 0x800;
+		need_segment = 1;
+	} else
+		need_segment = 0;
+
+	if (unlikely(dev != bus->mapped_device)) {
+		err = ssb_pcmcia_switch_core(bus, dev);
+		if (unlikely(err))
+			return err;
+	}
+	if (unlikely(need_segment != bus->mapped_pcmcia_seg)) {
+		err = ssb_pcmcia_switch_segment(bus, need_segment);
+		if (unlikely(err))
+			return err;
+	}
+
+	return 0;
+}
+
+static u8 ssb_pcmcia_read8(struct ssb_device *dev, u16 offset)
+{
+	struct ssb_bus *bus = dev->bus;
+	unsigned long flags;
+	int err;
+	u8 value = 0xFF;
+
+	spin_lock_irqsave(&bus->bar_lock, flags);
+	err = select_core_and_segment(dev, &offset);
+	if (likely(!err))
+		value = readb(bus->mmio + offset);
+	spin_unlock_irqrestore(&bus->bar_lock, flags);
+
+	return value;
+}
+
+static u16 ssb_pcmcia_read16(struct ssb_device *dev, u16 offset)
+{
+	struct ssb_bus *bus = dev->bus;
+	unsigned long flags;
+	int err;
+	u16 value = 0xFFFF;
+
+	spin_lock_irqsave(&bus->bar_lock, flags);
+	err = select_core_and_segment(dev, &offset);
+	if (likely(!err))
+		value = readw(bus->mmio + offset);
+	spin_unlock_irqrestore(&bus->bar_lock, flags);
+
+	return value;
+}
+
+static u32 ssb_pcmcia_read32(struct ssb_device *dev, u16 offset)
+{
+	struct ssb_bus *bus = dev->bus;
+	unsigned long flags;
+	int err;
+	u32 lo = 0xFFFFFFFF, hi = 0xFFFFFFFF;
+
+	spin_lock_irqsave(&bus->bar_lock, flags);
+	err = select_core_and_segment(dev, &offset);
+	if (likely(!err)) {
+		lo = readw(bus->mmio + offset);
+		hi = readw(bus->mmio + offset + 2);
+	}
+	spin_unlock_irqrestore(&bus->bar_lock, flags);
+
+	return (lo | (hi << 16));
+}
+
+#ifdef CONFIG_SSB_BLOCKIO
+static void ssb_pcmcia_block_read(struct ssb_device *dev, void *buffer,
+				  size_t count, u16 offset, u8 reg_width)
+{
+	struct ssb_bus *bus = dev->bus;
+	unsigned long flags;
+	void __iomem *addr = bus->mmio + offset;
+	int err;
+
+	spin_lock_irqsave(&bus->bar_lock, flags);
+	err = select_core_and_segment(dev, &offset);
+	if (unlikely(err)) {
+		memset(buffer, 0xFF, count);
+		goto unlock;
+	}
+	switch (reg_width) {
+	case sizeof(u8): {
+		u8 *buf = buffer;
+
+		while (count) {
+			*buf = __raw_readb(addr);
+			buf++;
+			count--;
+		}
+		break;
+	}
+	case sizeof(u16): {
+		__le16 *buf = buffer;
+
+		SSB_WARN_ON(count & 1);
+		while (count) {
+			*buf = (__force __le16)__raw_readw(addr);
+			buf++;
+			count -= 2;
+		}
+		break;
+	}
+	case sizeof(u32): {
+		__le16 *buf = buffer;
+
+		SSB_WARN_ON(count & 3);
+		while (count) {
+			*buf = (__force __le16)__raw_readw(addr);
+			buf++;
+			*buf = (__force __le16)__raw_readw(addr + 2);
+			buf++;
+			count -= 4;
+		}
+		break;
+	}
+	default:
+		SSB_WARN_ON(1);
+	}
+unlock:
+	spin_unlock_irqrestore(&bus->bar_lock, flags);
+}
+#endif /* CONFIG_SSB_BLOCKIO */
+
+static void ssb_pcmcia_write8(struct ssb_device *dev, u16 offset, u8 value)
+{
+	struct ssb_bus *bus = dev->bus;
+	unsigned long flags;
+	int err;
+
+	spin_lock_irqsave(&bus->bar_lock, flags);
+	err = select_core_and_segment(dev, &offset);
+	if (likely(!err))
+		writeb(value, bus->mmio + offset);
+	mmiowb();
+	spin_unlock_irqrestore(&bus->bar_lock, flags);
+}
+
+static void ssb_pcmcia_write16(struct ssb_device *dev, u16 offset, u16 value)
+{
+	struct ssb_bus *bus = dev->bus;
+	unsigned long flags;
+	int err;
+
+	spin_lock_irqsave(&bus->bar_lock, flags);
+	err = select_core_and_segment(dev, &offset);
+	if (likely(!err))
+		writew(value, bus->mmio + offset);
+	mmiowb();
+	spin_unlock_irqrestore(&bus->bar_lock, flags);
+}
+
+static void ssb_pcmcia_write32(struct ssb_device *dev, u16 offset, u32 value)
+{
+	struct ssb_bus *bus = dev->bus;
+	unsigned long flags;
+	int err;
+
+	spin_lock_irqsave(&bus->bar_lock, flags);
+	err = select_core_and_segment(dev, &offset);
+	if (likely(!err)) {
+		writew((value & 0x0000FFFF), bus->mmio + offset);
+		writew(((value & 0xFFFF0000) >> 16), bus->mmio + offset + 2);
+	}
+	mmiowb();
+	spin_unlock_irqrestore(&bus->bar_lock, flags);
+}
+
+#ifdef CONFIG_SSB_BLOCKIO
+static void ssb_pcmcia_block_write(struct ssb_device *dev, const void *buffer,
+				   size_t count, u16 offset, u8 reg_width)
+{
+	struct ssb_bus *bus = dev->bus;
+	unsigned long flags;
+	void __iomem *addr = bus->mmio + offset;
+	int err;
+
+	spin_lock_irqsave(&bus->bar_lock, flags);
+	err = select_core_and_segment(dev, &offset);
+	if (unlikely(err))
+		goto unlock;
+	switch (reg_width) {
+	case sizeof(u8): {
+		const u8 *buf = buffer;
+
+		while (count) {
+			__raw_writeb(*buf, addr);
+			buf++;
+			count--;
+		}
+		break;
+	}
+	case sizeof(u16): {
+		const __le16 *buf = buffer;
+
+		SSB_WARN_ON(count & 1);
+		while (count) {
+			__raw_writew((__force u16)(*buf), addr);
+			buf++;
+			count -= 2;
+		}
+		break;
+	}
+	case sizeof(u32): {
+		const __le16 *buf = buffer;
+
+		SSB_WARN_ON(count & 3);
+		while (count) {
+			__raw_writew((__force u16)(*buf), addr);
+			buf++;
+			__raw_writew((__force u16)(*buf), addr + 2);
+			buf++;
+			count -= 4;
+		}
+		break;
+	}
+	default:
+		SSB_WARN_ON(1);
+	}
+unlock:
+	mmiowb();
+	spin_unlock_irqrestore(&bus->bar_lock, flags);
+}
+#endif /* CONFIG_SSB_BLOCKIO */
+
+/* Not "static", as it's used in main.c */
+const struct ssb_bus_ops ssb_pcmcia_ops = {
+	.read8		= ssb_pcmcia_read8,
+	.read16		= ssb_pcmcia_read16,
+	.read32		= ssb_pcmcia_read32,
+	.write8		= ssb_pcmcia_write8,
+	.write16	= ssb_pcmcia_write16,
+	.write32	= ssb_pcmcia_write32,
+#ifdef CONFIG_SSB_BLOCKIO
+	.block_read	= ssb_pcmcia_block_read,
+	.block_write	= ssb_pcmcia_block_write,
+#endif
+};
+
+static int ssb_pcmcia_sprom_command(struct ssb_bus *bus, u8 command)
+{
+	unsigned int i;
+	int err;
+	u8 value;
+
+	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROMCTL, command);
+	if (err)
+		return err;
+	for (i = 0; i < 1000; i++) {
+		err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROMCTL, &value);
+		if (err)
+			return err;
+		if (value & SSB_PCMCIA_SPROMCTL_DONE)
+			return 0;
+		udelay(10);
+	}
+
+	return -ETIMEDOUT;
+}
+
+/* offset is the 16bit word offset */
+static int ssb_pcmcia_sprom_read(struct ssb_bus *bus, u16 offset, u16 *value)
+{
+	int err;
+	u8 lo, hi;
+
+	offset *= 2; /* Make byte offset */
+
+	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRLO,
+				   (offset & 0x00FF));
+	if (err)
+		return err;
+	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRHI,
+				   (offset & 0xFF00) >> 8);
+	if (err)
+		return err;
+	err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_READ);
+	if (err)
+		return err;
+	err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROM_DATALO, &lo);
+	if (err)
+		return err;
+	err = ssb_pcmcia_cfg_read(bus, SSB_PCMCIA_SPROM_DATAHI, &hi);
+	if (err)
+		return err;
+	*value = (lo | (((u16)hi) << 8));
+
+	return 0;
+}
+
+/* offset is the 16bit word offset */
+static int ssb_pcmcia_sprom_write(struct ssb_bus *bus, u16 offset, u16 value)
+{
+	int err;
+
+	offset *= 2; /* Make byte offset */
+
+	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRLO,
+				   (offset & 0x00FF));
+	if (err)
+		return err;
+	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_ADDRHI,
+				   (offset & 0xFF00) >> 8);
+	if (err)
+		return err;
+	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_DATALO,
+				   (value & 0x00FF));
+	if (err)
+		return err;
+	err = ssb_pcmcia_cfg_write(bus, SSB_PCMCIA_SPROM_DATAHI,
+				   (value & 0xFF00) >> 8);
+	if (err)
+		return err;
+	err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITE);
+	if (err)
+		return err;
+	msleep(20);
+
+	return 0;
+}
+
+/* Read the SPROM image. bufsize is in 16bit words. */
+static int ssb_pcmcia_sprom_read_all(struct ssb_bus *bus, u16 *sprom)
+{
+	int err, i;
+
+	for (i = 0; i < SSB_PCMCIA_SPROM_SIZE; i++) {
+		err = ssb_pcmcia_sprom_read(bus, i, &sprom[i]);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+/* Write the SPROM image. size is in 16bit words. */
+static int ssb_pcmcia_sprom_write_all(struct ssb_bus *bus, const u16 *sprom)
+{
+	int i, err;
+	bool failed = 0;
+	size_t size = SSB_PCMCIA_SPROM_SIZE;
+
+	ssb_notice("Writing SPROM. Do NOT turn off the power! Please stand by...\n");
+	err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITEEN);
+	if (err) {
+		ssb_notice("Could not enable SPROM write access\n");
+		return -EBUSY;
+	}
+	ssb_notice("[ 0%%");
+	msleep(500);
+	for (i = 0; i < size; i++) {
+		if (i == size / 4)
+			ssb_cont("25%%");
+		else if (i == size / 2)
+			ssb_cont("50%%");
+		else if (i == (size * 3) / 4)
+			ssb_cont("75%%");
+		else if (i % 2)
+			ssb_cont(".");
+		err = ssb_pcmcia_sprom_write(bus, i, sprom[i]);
+		if (err) {
+			ssb_notice("Failed to write to SPROM\n");
+			failed = 1;
+			break;
+		}
+	}
+	err = ssb_pcmcia_sprom_command(bus, SSB_PCMCIA_SPROMCTL_WRITEDIS);
+	if (err) {
+		ssb_notice("Could not disable SPROM write access\n");
+		failed = 1;
+	}
+	msleep(500);
+	if (!failed) {
+		ssb_cont("100%% ]\n");
+		ssb_notice("SPROM written\n");
+	}
+
+	return failed ? -EBUSY : 0;
+}
+
+static int ssb_pcmcia_sprom_check_crc(const u16 *sprom, size_t size)
+{
+	//TODO
+	return 0;
+}
+
+#define GOTO_ERROR_ON(condition, description) do {	\
+	if (unlikely(condition)) {			\
+		error_description = description;	\
+		goto error;				\
+	}						\
+  } while (0)
+
+static int ssb_pcmcia_get_mac(struct pcmcia_device *p_dev,
+			tuple_t *tuple,
+			void *priv)
+{
+	struct ssb_sprom *sprom = priv;
+
+	if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID)
+		return -EINVAL;
+	if (tuple->TupleDataLen != ETH_ALEN + 2)
+		return -EINVAL;
+	if (tuple->TupleData[1] != ETH_ALEN)
+		return -EINVAL;
+	memcpy(sprom->il0mac, &tuple->TupleData[2], ETH_ALEN);
+	return 0;
+};
+
+static int ssb_pcmcia_do_get_invariants(struct pcmcia_device *p_dev,
+					tuple_t *tuple,
+					void *priv)
+{
+	struct ssb_init_invariants *iv = priv;
+	struct ssb_sprom *sprom = &iv->sprom;
+	struct ssb_boardinfo *bi = &iv->boardinfo;
+	const char *error_description;
+
+	GOTO_ERROR_ON(tuple->TupleDataLen < 1, "VEN tpl < 1");
+	switch (tuple->TupleData[0]) {
+	case SSB_PCMCIA_CIS_ID:
+		GOTO_ERROR_ON((tuple->TupleDataLen != 5) &&
+			      (tuple->TupleDataLen != 7),
+			      "id tpl size");
+		bi->vendor = tuple->TupleData[1] |
+			((u16)tuple->TupleData[2] << 8);
+		break;
+	case SSB_PCMCIA_CIS_BOARDREV:
+		GOTO_ERROR_ON(tuple->TupleDataLen != 2,
+			"boardrev tpl size");
+		sprom->board_rev = tuple->TupleData[1];
+		break;
+	case SSB_PCMCIA_CIS_PA:
+		GOTO_ERROR_ON((tuple->TupleDataLen != 9) &&
+			(tuple->TupleDataLen != 10),
+			"pa tpl size");
+		sprom->pa0b0 = tuple->TupleData[1] |
+			((u16)tuple->TupleData[2] << 8);
+		sprom->pa0b1 = tuple->TupleData[3] |
+			((u16)tuple->TupleData[4] << 8);
+		sprom->pa0b2 = tuple->TupleData[5] |
+			((u16)tuple->TupleData[6] << 8);
+		sprom->itssi_a = tuple->TupleData[7];
+		sprom->itssi_bg = tuple->TupleData[7];
+		sprom->maxpwr_a = tuple->TupleData[8];
+		sprom->maxpwr_bg = tuple->TupleData[8];
+		break;
+	case SSB_PCMCIA_CIS_OEMNAME:
+		/* We ignore this. */
+		break;
+	case SSB_PCMCIA_CIS_CCODE:
+		GOTO_ERROR_ON(tuple->TupleDataLen != 2,
+			"ccode tpl size");
+		sprom->country_code = tuple->TupleData[1];
+		break;
+	case SSB_PCMCIA_CIS_ANTENNA:
+		GOTO_ERROR_ON(tuple->TupleDataLen != 2,
+			"ant tpl size");
+		sprom->ant_available_a = tuple->TupleData[1];
+		sprom->ant_available_bg = tuple->TupleData[1];
+		break;
+	case SSB_PCMCIA_CIS_ANTGAIN:
+		GOTO_ERROR_ON(tuple->TupleDataLen != 2,
+			"antg tpl size");
+		sprom->antenna_gain.a0 = tuple->TupleData[1];
+		sprom->antenna_gain.a1 = tuple->TupleData[1];
+		sprom->antenna_gain.a2 = tuple->TupleData[1];
+		sprom->antenna_gain.a3 = tuple->TupleData[1];
+		break;
+	case SSB_PCMCIA_CIS_BFLAGS:
+		GOTO_ERROR_ON((tuple->TupleDataLen != 3) &&
+			(tuple->TupleDataLen != 5),
+			"bfl tpl size");
+		sprom->boardflags_lo = tuple->TupleData[1] |
+			((u16)tuple->TupleData[2] << 8);
+		break;
+	case SSB_PCMCIA_CIS_LEDS:
+		GOTO_ERROR_ON(tuple->TupleDataLen != 5,
+			"leds tpl size");
+		sprom->gpio0 = tuple->TupleData[1];
+		sprom->gpio1 = tuple->TupleData[2];
+		sprom->gpio2 = tuple->TupleData[3];
+		sprom->gpio3 = tuple->TupleData[4];
+		break;
+	}
+	return -ENOSPC; /* continue with next entry */
+
+error:
+	ssb_err(
+		   "PCMCIA: Failed to fetch device invariants: %s\n",
+		   error_description);
+	return -ENODEV;
+}
+
+
+int ssb_pcmcia_get_invariants(struct ssb_bus *bus,
+			      struct ssb_init_invariants *iv)
+{
+	struct ssb_sprom *sprom = &iv->sprom;
+	int res;
+
+	memset(sprom, 0xFF, sizeof(*sprom));
+	sprom->revision = 1;
+	sprom->boardflags_lo = 0;
+	sprom->boardflags_hi = 0;
+
+	/* First fetch the MAC address. */
+	res = pcmcia_loop_tuple(bus->host_pcmcia, CISTPL_FUNCE,
+				ssb_pcmcia_get_mac, sprom);
+	if (res != 0) {
+		ssb_err(
+			"PCMCIA: Failed to fetch MAC address\n");
+		return -ENODEV;
+	}
+
+	/* Fetch the vendor specific tuples. */
+	res = pcmcia_loop_tuple(bus->host_pcmcia, SSB_PCMCIA_CIS,
+				ssb_pcmcia_do_get_invariants, iv);
+	if ((res == 0) || (res == -ENOSPC))
+		return 0;
+
+	ssb_err(
+			"PCMCIA: Failed to fetch device invariants\n");
+	return -ENODEV;
+}
+
+static ssize_t ssb_pcmcia_attr_sprom_show(struct device *pcmciadev,
+					  struct device_attribute *attr,
+					  char *buf)
+{
+	struct pcmcia_device *pdev =
+		container_of(pcmciadev, struct pcmcia_device, dev);
+	struct ssb_bus *bus;
+
+	bus = ssb_pcmcia_dev_to_bus(pdev);
+	if (!bus)
+		return -ENODEV;
+
+	return ssb_attr_sprom_show(bus, buf,
+				   ssb_pcmcia_sprom_read_all);
+}
+
+static ssize_t ssb_pcmcia_attr_sprom_store(struct device *pcmciadev,
+					   struct device_attribute *attr,
+					   const char *buf, size_t count)
+{
+	struct pcmcia_device *pdev =
+		container_of(pcmciadev, struct pcmcia_device, dev);
+	struct ssb_bus *bus;
+
+	bus = ssb_pcmcia_dev_to_bus(pdev);
+	if (!bus)
+		return -ENODEV;
+
+	return ssb_attr_sprom_store(bus, buf, count,
+				    ssb_pcmcia_sprom_check_crc,
+				    ssb_pcmcia_sprom_write_all);
+}
+
+static DEVICE_ATTR(ssb_sprom, 0600,
+		   ssb_pcmcia_attr_sprom_show,
+		   ssb_pcmcia_attr_sprom_store);
+
+static int ssb_pcmcia_cor_setup(struct ssb_bus *bus, u8 cor)
+{
+	u8 val;
+	int err;
+
+	err = ssb_pcmcia_cfg_read(bus, cor, &val);
+	if (err)
+		return err;
+	val &= ~COR_SOFT_RESET;
+	val |= COR_FUNC_ENA | COR_IREQ_ENA | COR_LEVEL_REQ;
+	err = ssb_pcmcia_cfg_write(bus, cor, val);
+	if (err)
+		return err;
+	msleep(40);
+
+	return 0;
+}
+
+/* Initialize the PCMCIA hardware. This is called on Init and Resume. */
+int ssb_pcmcia_hardware_setup(struct ssb_bus *bus)
+{
+	int err;
+
+	if (bus->bustype != SSB_BUSTYPE_PCMCIA)
+		return 0;
+
+	/* Switch segment to a known state and sync
+	 * bus->mapped_pcmcia_seg with hardware state. */
+	ssb_pcmcia_switch_segment(bus, 0);
+	/* Init the COR register. */
+	err = ssb_pcmcia_cor_setup(bus, CISREG_COR);
+	if (err)
+		return err;
+	/* Some cards also need this register to get poked. */
+	err = ssb_pcmcia_cor_setup(bus, CISREG_COR + 0x80);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+void ssb_pcmcia_exit(struct ssb_bus *bus)
+{
+	if (bus->bustype != SSB_BUSTYPE_PCMCIA)
+		return;
+
+	device_remove_file(&bus->host_pcmcia->dev, &dev_attr_ssb_sprom);
+}
+
+int ssb_pcmcia_init(struct ssb_bus *bus)
+{
+	int err;
+
+	if (bus->bustype != SSB_BUSTYPE_PCMCIA)
+		return 0;
+
+	err = ssb_pcmcia_hardware_setup(bus);
+	if (err)
+		goto error;
+
+	bus->sprom_size = SSB_PCMCIA_SPROM_SIZE;
+	mutex_init(&bus->sprom_mutex);
+	err = device_create_file(&bus->host_pcmcia->dev, &dev_attr_ssb_sprom);
+	if (err)
+		goto error;
+
+	return 0;
+error:
+	ssb_err("Failed to initialize PCMCIA host device\n");
+	return err;
+}