remove more redundant files and clone files-2.6.23 for 2.6.24 - fixes rdc build errors

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13022 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 790 insertions, 0 deletions

diff --git a/target/linux/generic-2.6/files-2.6.24/drivers/ssb/pci.c b/target/linux/generic-2.6/files-2.6.24/drivers/ssb/pci.c
new file mode 100644
index 000000000..b434df750
--- /dev/null
+++ b/target/linux/generic-2.6/files-2.6.24/drivers/ssb/pci.c
@@ -0,0 +1,790 @@
+/*
+ * Sonics Silicon Backplane PCI-Hostbus related functions.
+ *
+ * Copyright (C) 2005-2006 Michael Buesch <mb@bu3sch.de>
+ * Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
+ * Copyright (C) 2005 Stefano Brivio <st3@riseup.net>
+ * Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
+ * Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
+ *
+ * Derived from the Broadcom 4400 device driver.
+ * Copyright (C) 2002 David S. Miller (davem@redhat.com)
+ * Fixed by Pekka Pietikainen (pp@ee.oulu.fi)
+ * Copyright (C) 2006 Broadcom Corporation.
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include <linux/ssb/ssb.h>
+#include <linux/ssb/ssb_regs.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+
+#include "ssb_private.h"
+
+
+/* Define the following to 1 to enable a printk on each coreswitch. */
+#define SSB_VERBOSE_PCICORESWITCH_DEBUG		0
+
+
+/* Lowlevel coreswitching */
+int ssb_pci_switch_coreidx(struct ssb_bus *bus, u8 coreidx)
+{
+	int err;
+	int attempts = 0;
+	u32 cur_core;
+
+	while (1) {
+		err = pci_write_config_dword(bus->host_pci, SSB_BAR0_WIN,
+					     (coreidx * SSB_CORE_SIZE)
+					     + SSB_ENUM_BASE);
+		if (err)
+			goto error;
+		err = pci_read_config_dword(bus->host_pci, SSB_BAR0_WIN,
+					    &cur_core);
+		if (err)
+			goto error;
+		cur_core = (cur_core - SSB_ENUM_BASE)
+			   / SSB_CORE_SIZE;
+		if (cur_core == coreidx)
+			break;
+
+		if (attempts++ > SSB_BAR0_MAX_RETRIES)
+			goto error;
+		udelay(10);
+	}
+	return 0;
+error:
+	ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx);
+	return -ENODEV;
+}
+
+int ssb_pci_switch_core(struct ssb_bus *bus,
+			struct ssb_device *dev)
+{
+	int err;
+	unsigned long flags;
+
+#if SSB_VERBOSE_PCICORESWITCH_DEBUG
+	ssb_printk(KERN_INFO PFX
+		   "Switching to %s core, index %d\n",
+		   ssb_core_name(dev->id.coreid),
+		   dev->core_index);
+#endif
+
+	spin_lock_irqsave(&bus->bar_lock, flags);
+	err = ssb_pci_switch_coreidx(bus, dev->core_index);
+	if (!err)
+		bus->mapped_device = dev;
+	spin_unlock_irqrestore(&bus->bar_lock, flags);
+
+	return err;
+}
+
+/* Enable/disable the on board crystal oscillator and/or PLL. */
+int ssb_pci_xtal(struct ssb_bus *bus, u32 what, int turn_on)
+{
+	int err;
+	u32 in, out, outenable;
+	u16 pci_status;
+
+	if (bus->bustype != SSB_BUSTYPE_PCI)
+		return 0;
+
+	err = pci_read_config_dword(bus->host_pci, SSB_GPIO_IN, &in);
+	if (err)
+		goto err_pci;
+	err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT, &out);
+	if (err)
+		goto err_pci;
+	err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, &outenable);
+	if (err)
+		goto err_pci;
+
+	outenable |= what;
+
+	if (turn_on) {
+		/* Avoid glitching the clock if GPRS is already using it.
+		 * We can't actually read the state of the PLLPD so we infer it
+		 * by the value of XTAL_PU which *is* readable via gpioin.
+		 */
+		if (!(in & SSB_GPIO_XTAL)) {
+			if (what & SSB_GPIO_XTAL) {
+				/* Turn the crystal on */
+				out |= SSB_GPIO_XTAL;
+				if (what & SSB_GPIO_PLL)
+					out |= SSB_GPIO_PLL;
+				err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
+				if (err)
+					goto err_pci;
+				err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE,
+							     outenable);
+				if (err)
+					goto err_pci;
+				msleep(1);
+			}
+			if (what & SSB_GPIO_PLL) {
+				/* Turn the PLL on */
+				out &= ~SSB_GPIO_PLL;
+				err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
+				if (err)
+					goto err_pci;
+				msleep(5);
+			}
+		}
+
+		err = pci_read_config_word(bus->host_pci, PCI_STATUS, &pci_status);
+		if (err)
+			goto err_pci;
+		pci_status &= ~PCI_STATUS_SIG_TARGET_ABORT;
+		err = pci_write_config_word(bus->host_pci, PCI_STATUS, pci_status);
+		if (err)
+			goto err_pci;
+	} else {
+		if (what & SSB_GPIO_XTAL) {
+			/* Turn the crystal off */
+			out &= ~SSB_GPIO_XTAL;
+		}
+		if (what & SSB_GPIO_PLL) {
+			/* Turn the PLL off */
+			out |= SSB_GPIO_PLL;
+		}
+		err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
+		if (err)
+			goto err_pci;
+		err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, outenable);
+		if (err)
+			goto err_pci;
+	}
+
+out:
+	return err;
+
+err_pci:
+	printk(KERN_ERR PFX "Error: ssb_pci_xtal() could not access PCI config space!\n");
+	err = -EBUSY;
+	goto out;
+}
+
+/* Get the word-offset for a SSB_SPROM_XXX define. */
+#define SPOFF(offset)	(((offset) - SSB_SPROM_BASE) / sizeof(u16))
+/* Helper to extract some _offset, which is one of the SSB_SPROM_XXX defines. */
+#define SPEX(_outvar, _offset, _mask, _shift)	\
+	out->_outvar = ((in[SPOFF(_offset)] & (_mask)) >> (_shift))
+
+static inline u8 ssb_crc8(u8 crc, u8 data)
+{
+	/* Polynomial:   x^8 + x^7 + x^6 + x^4 + x^2 + 1   */
+	static const u8 t[] = {
+		0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
+		0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
+		0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
+		0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
+		0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
+		0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
+		0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
+		0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
+		0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
+		0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
+		0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
+		0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
+		0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
+		0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
+		0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
+		0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
+		0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
+		0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
+		0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
+		0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
+		0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
+		0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
+		0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
+		0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
+		0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
+		0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
+		0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
+		0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
+		0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
+		0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
+		0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
+		0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F,
+	};
+	return t[crc ^ data];
+}
+
+static u8 ssb_sprom_crc(const u16 *sprom, u16 size)
+{
+	int word;
+	u8 crc = 0xFF;
+
+	for (word = 0; word < size - 1; word++) {
+		crc = ssb_crc8(crc, sprom[word] & 0x00FF);
+		crc = ssb_crc8(crc, (sprom[word] & 0xFF00) >> 8);
+	}
+	crc = ssb_crc8(crc, sprom[size - 1] & 0x00FF);
+	crc ^= 0xFF;
+
+	return crc;
+}
+
+static int sprom_check_crc(const u16 *sprom, u16 size)
+{
+	u8 crc;
+	u8 expected_crc;
+	u16 tmp;
+
+	crc = ssb_sprom_crc(sprom, size);
+	tmp = sprom[size - 1] & SSB_SPROM_REVISION_CRC;
+	expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
+	if (crc != expected_crc)
+		return -EPROTO;
+
+	return 0;
+}
+
+static void sprom_do_read(struct ssb_bus *bus, u16 *sprom)
+{
+	int i;
+
+	for (i = 0; i < bus->sprom_size; i++)
+		sprom[i] = ioread16(bus->mmio + SSB_SPROM_BASE + (i * 2));
+}
+
+static int sprom_do_write(struct ssb_bus *bus, const u16 *sprom)
+{
+	struct pci_dev *pdev = bus->host_pci;
+	int i, err;
+	u32 spromctl;
+	u16 size = bus->sprom_size;
+
+	ssb_printk(KERN_NOTICE PFX "Writing SPROM. Do NOT turn off the power! Please stand by...\n");
+	err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
+	if (err)
+		goto err_ctlreg;
+	spromctl |= SSB_SPROMCTL_WE;
+	err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
+	if (err)
+		goto err_ctlreg;
+	ssb_printk(KERN_NOTICE PFX "[ 0%%");
+	msleep(500);
+	for (i = 0; i < size; i++) {
+		if (i == size / 4)
+			ssb_printk("25%%");
+		else if (i == size / 2)
+			ssb_printk("50%%");
+		else if (i == (size * 3) / 4)
+			ssb_printk("75%%");
+		else if (i % 2)
+			ssb_printk(".");
+		writew(sprom[i], bus->mmio + SSB_SPROM_BASE + (i * 2));
+		mmiowb();
+		msleep(20);
+	}
+	err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
+	if (err)
+		goto err_ctlreg;
+	spromctl &= ~SSB_SPROMCTL_WE;
+	err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
+	if (err)
+		goto err_ctlreg;
+	msleep(500);
+	ssb_printk("100%% ]\n");
+	ssb_printk(KERN_NOTICE PFX "SPROM written.\n");
+
+	return 0;
+err_ctlreg:
+	ssb_printk(KERN_ERR PFX "Could not access SPROM control register.\n");
+	return err;
+}
+
+static s8 r123_extract_antgain(u8 sprom_revision, const u16 *in,
+			       u16 mask, u16 shift)
+{
+	u16 v;
+	u8 gain;
+
+	v = in[SPOFF(SSB_SPROM1_AGAIN)];
+	gain = (v & mask) >> shift;
+	if (gain == 0xFF)
+		gain = 2; /* If unset use 2dBm */
+	if (sprom_revision == 1) {
+		/* Convert to Q5.2 */
+		gain <<= 2;
+	} else {
+		/* Q5.2 Fractional part is stored in 0xC0 */
+		gain = ((gain & 0xC0) >> 6) | ((gain & 0x3F) << 2);
+	}
+
+	return (s8)gain;
+}
+
+static void sprom_extract_r123(struct ssb_sprom *out, const u16 *in)
+{
+	int i;
+	u16 v;
+	s8 gain;
+	u16 loc[3];
+
+	if (out->revision == 3) {			/* rev 3 moved MAC */
+		loc[0] = SSB_SPROM3_IL0MAC;
+		loc[1] = SSB_SPROM3_ET0MAC;
+		loc[2] = SSB_SPROM3_ET1MAC;
+	} else {
+		loc[0] = SSB_SPROM1_IL0MAC;
+		loc[1] = SSB_SPROM1_ET0MAC;
+		loc[2] = SSB_SPROM1_ET1MAC;
+	}
+	for (i = 0; i < 3; i++) {
+		v = in[SPOFF(loc[0]) + i];
+		*(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
+	}
+	for (i = 0; i < 3; i++) {
+		v = in[SPOFF(loc[1]) + i];
+		*(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
+	}
+	for (i = 0; i < 3; i++) {
+		v = in[SPOFF(loc[2]) + i];
+		*(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
+	}
+	SPEX(et0phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0A, 0);
+	SPEX(et1phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1A,
+	     SSB_SPROM1_ETHPHY_ET1A_SHIFT);
+	SPEX(et0mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0M, 14);
+	SPEX(et1mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1M, 15);
+	SPEX(board_rev, SSB_SPROM1_BINF, SSB_SPROM1_BINF_BREV, 0);
+	SPEX(country_code, SSB_SPROM1_BINF, SSB_SPROM1_BINF_CCODE,
+	     SSB_SPROM1_BINF_CCODE_SHIFT);
+	SPEX(ant_available_a, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTA,
+	     SSB_SPROM1_BINF_ANTA_SHIFT);
+	SPEX(ant_available_bg, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTBG,
+	     SSB_SPROM1_BINF_ANTBG_SHIFT);
+	SPEX(pa0b0, SSB_SPROM1_PA0B0, 0xFFFF, 0);
+	SPEX(pa0b1, SSB_SPROM1_PA0B1, 0xFFFF, 0);
+	SPEX(pa0b2, SSB_SPROM1_PA0B2, 0xFFFF, 0);
+	SPEX(pa1b0, SSB_SPROM1_PA1B0, 0xFFFF, 0);
+	SPEX(pa1b1, SSB_SPROM1_PA1B1, 0xFFFF, 0);
+	SPEX(pa1b2, SSB_SPROM1_PA1B2, 0xFFFF, 0);
+	SPEX(gpio0, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P0, 0);
+	SPEX(gpio1, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P1,
+	     SSB_SPROM1_GPIOA_P1_SHIFT);
+	SPEX(gpio2, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P2, 0);
+	SPEX(gpio3, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P3,
+	     SSB_SPROM1_GPIOB_P3_SHIFT);
+	SPEX(maxpwr_a, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_A,
+	     SSB_SPROM1_MAXPWR_A_SHIFT);
+	SPEX(maxpwr_bg, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_BG, 0);
+	SPEX(itssi_a, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_A,
+	     SSB_SPROM1_ITSSI_A_SHIFT);
+	SPEX(itssi_bg, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_BG, 0);
+	SPEX(boardflags_lo, SSB_SPROM1_BFLLO, 0xFFFF, 0);
+	if (out->revision >= 2)
+		SPEX(boardflags_hi, SSB_SPROM2_BFLHI, 0xFFFF, 0);
+
+	/* Extract the antenna gain values. */
+	gain = r123_extract_antgain(out->revision, in,
+				    SSB_SPROM1_AGAIN_BG,
+				    SSB_SPROM1_AGAIN_BG_SHIFT);
+	out->antenna_gain.ghz24.a0 = gain;
+	out->antenna_gain.ghz24.a1 = gain;
+	out->antenna_gain.ghz24.a2 = gain;
+	out->antenna_gain.ghz24.a3 = gain;
+	gain = r123_extract_antgain(out->revision, in,
+				    SSB_SPROM1_AGAIN_A,
+				    SSB_SPROM1_AGAIN_A_SHIFT);
+	out->antenna_gain.ghz5.a0 = gain;
+	out->antenna_gain.ghz5.a1 = gain;
+	out->antenna_gain.ghz5.a2 = gain;
+	out->antenna_gain.ghz5.a3 = gain;
+}
+
+static void sprom_extract_r4(struct ssb_sprom *out, const u16 *in)
+{
+	int i;
+	u16 v;
+
+	/* extract the equivalent of the r1 variables */
+	for (i = 0; i < 3; i++) {
+		v = in[SPOFF(SSB_SPROM4_IL0MAC) + i];
+		*(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
+	}
+	for (i = 0; i < 3; i++) {
+		v = in[SPOFF(SSB_SPROM4_ET0MAC) + i];
+		*(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
+	}
+	for (i = 0; i < 3; i++) {
+		v = in[SPOFF(SSB_SPROM4_ET1MAC) + i];
+		*(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
+	}
+	SPEX(et0phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET0A, 0);
+	SPEX(et1phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET1A,
+	     SSB_SPROM4_ETHPHY_ET1A_SHIFT);
+	SPEX(country_code, SSB_SPROM4_CCODE, 0xFFFF, 0);
+	SPEX(boardflags_lo, SSB_SPROM4_BFLLO, 0xFFFF, 0);
+	SPEX(boardflags_hi, SSB_SPROM4_BFLHI, 0xFFFF, 0);
+	SPEX(ant_available_a, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_A,
+	     SSB_SPROM4_ANTAVAIL_A_SHIFT);
+	SPEX(ant_available_bg, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_BG,
+	     SSB_SPROM4_ANTAVAIL_BG_SHIFT);
+	SPEX(maxpwr_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_MAXP_BG_MASK, 0);
+	SPEX(itssi_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_ITSSI_BG,
+	     SSB_SPROM4_ITSSI_BG_SHIFT);
+	SPEX(maxpwr_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_MAXP_A_MASK, 0);
+	SPEX(itssi_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_ITSSI_A,
+	     SSB_SPROM4_ITSSI_A_SHIFT);
+	SPEX(gpio0, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P0, 0);
+	SPEX(gpio1, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P1,
+	     SSB_SPROM4_GPIOA_P1_SHIFT);
+	SPEX(gpio2, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P2, 0);
+	SPEX(gpio3, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P3,
+	     SSB_SPROM4_GPIOB_P3_SHIFT);
+
+	/* Extract the antenna gain values. */
+	SPEX(antenna_gain.ghz24.a0, SSB_SPROM4_AGAIN01,
+	     SSB_SPROM4_AGAIN0, SSB_SPROM4_AGAIN0_SHIFT);
+	SPEX(antenna_gain.ghz24.a1, SSB_SPROM4_AGAIN01,
+	     SSB_SPROM4_AGAIN1, SSB_SPROM4_AGAIN1_SHIFT);
+	SPEX(antenna_gain.ghz24.a2, SSB_SPROM4_AGAIN23,
+	     SSB_SPROM4_AGAIN2, SSB_SPROM4_AGAIN2_SHIFT);
+	SPEX(antenna_gain.ghz24.a3, SSB_SPROM4_AGAIN23,
+	     SSB_SPROM4_AGAIN3, SSB_SPROM4_AGAIN3_SHIFT);
+	memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
+	       sizeof(out->antenna_gain.ghz5));
+
+	/* TODO - get remaining rev 4 stuff needed */
+}
+
+static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out,
+			 const u16 *in, u16 size)
+{
+	memset(out, 0, sizeof(*out));
+
+	out->revision = in[size - 1] & 0x00FF;
+	ssb_dprintk(KERN_DEBUG PFX "SPROM revision %d detected.\n", out->revision);
+	if ((bus->chip_id & 0xFF00) == 0x4400) {
+		/* Workaround: The BCM44XX chip has a stupid revision
+		 * number stored in the SPROM.
+		 * Always extract r1. */
+		out->revision = 1;
+		sprom_extract_r123(out, in);
+	} else if (bus->chip_id == 0x4321) {
+		/* the BCM4328 has a chipid == 0x4321 and a rev 4 SPROM */
+		out->revision = 4;
+		sprom_extract_r4(out, in);
+	} else {
+		if (out->revision == 0)
+			goto unsupported;
+		if (out->revision >= 1 && out->revision <= 3) {
+			sprom_extract_r123(out, in);
+		}
+		if (out->revision == 4)
+			sprom_extract_r4(out, in);
+		if (out->revision >= 5)
+			goto unsupported;
+	}
+
+	return 0;
+unsupported:
+	ssb_printk(KERN_WARNING PFX "Unsupported SPROM revision %d "
+		   "detected. Will extract v1\n", out->revision);
+	sprom_extract_r123(out, in);
+	return 0;
+}
+
+static int ssb_pci_sprom_get(struct ssb_bus *bus,
+			     struct ssb_sprom *sprom)
+{
+	int err = -ENOMEM;
+	u16 *buf;
+
+	buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
+	if (!buf)
+		goto out;
+	bus->sprom_size = SSB_SPROMSIZE_WORDS_R123;
+	sprom_do_read(bus, buf);
+	err = sprom_check_crc(buf, bus->sprom_size);
+	if (err) {
+		/* check for rev 4 sprom - has special signature */
+		if (buf[32] == 0x5372) {
+			kfree(buf);
+			buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
+				      GFP_KERNEL);
+			if (!buf)
+				goto out;
+			bus->sprom_size = SSB_SPROMSIZE_WORDS_R4;
+			sprom_do_read(bus, buf);
+			err = sprom_check_crc(buf, bus->sprom_size);
+		}
+		if (err)
+			ssb_printk(KERN_WARNING PFX "WARNING: Invalid"
+				   " SPROM CRC (corrupt SPROM)\n");
+	}
+	err = sprom_extract(bus, sprom, buf, bus->sprom_size);
+
+	kfree(buf);
+out:
+	return err;
+}
+
+static void ssb_pci_get_boardinfo(struct ssb_bus *bus,
+				  struct ssb_boardinfo *bi)
+{
+	pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_VENDOR_ID,
+			     &bi->vendor);
+	pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_ID,
+			     &bi->type);
+	pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
+			     &bi->rev);
+}
+
+int ssb_pci_get_invariants(struct ssb_bus *bus,
+			   struct ssb_init_invariants *iv)
+{
+	int err;
+
+	err = ssb_pci_sprom_get(bus, &iv->sprom);
+	if (err)
+		goto out;
+	ssb_pci_get_boardinfo(bus, &iv->boardinfo);
+
+out:
+	return err;
+}
+
+#ifdef CONFIG_SSB_DEBUG
+static int ssb_pci_assert_buspower(struct ssb_bus *bus)
+{
+	if (likely(bus->powered_up))
+		return 0;
+
+	printk(KERN_ERR PFX "FATAL ERROR: Bus powered down "
+	       "while accessing PCI MMIO space\n");
+	if (bus->power_warn_count <= 10) {
+		bus->power_warn_count++;
+		dump_stack();
+	}
+
+	return -ENODEV;
+}
+#else /* DEBUG */
+static inline int ssb_pci_assert_buspower(struct ssb_bus *bus)
+{
+	return 0;
+}
+#endif /* DEBUG */
+
+static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset)
+{
+	struct ssb_bus *bus = dev->bus;
+
+	if (unlikely(ssb_pci_assert_buspower(bus)))
+		return 0xFFFF;
+	if (unlikely(bus->mapped_device != dev)) {
+		if (unlikely(ssb_pci_switch_core(bus, dev)))
+			return 0xFFFF;
+	}
+	return ioread16(bus->mmio + offset);
+}
+
+static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset)
+{
+	struct ssb_bus *bus = dev->bus;
+
+	if (unlikely(ssb_pci_assert_buspower(bus)))
+		return 0xFFFFFFFF;
+	if (unlikely(bus->mapped_device != dev)) {
+		if (unlikely(ssb_pci_switch_core(bus, dev)))
+			return 0xFFFFFFFF;
+	}
+	return ioread32(bus->mmio + offset);
+}
+
+static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value)
+{
+	struct ssb_bus *bus = dev->bus;
+
+	if (unlikely(ssb_pci_assert_buspower(bus)))
+		return;
+	if (unlikely(bus->mapped_device != dev)) {
+		if (unlikely(ssb_pci_switch_core(bus, dev)))
+			return;
+	}
+	iowrite16(value, bus->mmio + offset);
+}
+
+static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 value)
+{
+	struct ssb_bus *bus = dev->bus;
+
+	if (unlikely(ssb_pci_assert_buspower(bus)))
+		return;
+	if (unlikely(bus->mapped_device != dev)) {
+		if (unlikely(ssb_pci_switch_core(bus, dev)))
+			return;
+	}
+	iowrite32(value, bus->mmio + offset);
+}
+
+/* Not "static", as it's used in main.c */
+const struct ssb_bus_ops ssb_pci_ops = {
+	.read16		= ssb_pci_read16,
+	.read32		= ssb_pci_read32,
+	.write16	= ssb_pci_write16,
+	.write32	= ssb_pci_write32,
+};
+
+static int sprom2hex(const u16 *sprom, char *buf, size_t buf_len, u16 size)
+{
+	int i, pos = 0;
+
+	for (i = 0; i < size; i++)
+		pos += snprintf(buf + pos, buf_len - pos - 1,
+				"%04X", swab16(sprom[i]) & 0xFFFF);
+	pos += snprintf(buf + pos, buf_len - pos - 1, "\n");
+
+	return pos + 1;
+}
+
+static int hex2sprom(u16 *sprom, const char *dump, size_t len, u16 size)
+{
+	char tmp[5] = { 0 };
+	int cnt = 0;
+	unsigned long parsed;
+
+	if (len < size * 2)
+		return -EINVAL;
+
+	while (cnt < size) {
+		memcpy(tmp, dump, 4);
+		dump += 4;
+		parsed = simple_strtoul(tmp, NULL, 16);
+		sprom[cnt++] = swab16((u16)parsed);
+	}
+
+	return 0;
+}
+
+static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
+				       struct device_attribute *attr,
+				       char *buf)
+{
+	struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
+	struct ssb_bus *bus;
+	u16 *sprom;
+	int err = -ENODEV;
+	ssize_t count = 0;
+
+	bus = ssb_pci_dev_to_bus(pdev);
+	if (!bus)
+		goto out;
+	err = -ENOMEM;
+	sprom = kcalloc(bus->sprom_size, sizeof(u16), GFP_KERNEL);
+	if (!sprom)
+		goto out;
+
+	/* Use interruptible locking, as the SPROM write might
+	 * be holding the lock for several seconds. So allow userspace
+	 * to cancel operation. */
+	err = -ERESTARTSYS;
+	if (mutex_lock_interruptible(&bus->pci_sprom_mutex))
+		goto out_kfree;
+	sprom_do_read(bus, sprom);
+	mutex_unlock(&bus->pci_sprom_mutex);
+
+	count = sprom2hex(sprom, buf, PAGE_SIZE, bus->sprom_size);
+	err = 0;
+
+out_kfree:
+	kfree(sprom);
+out:
+	return err ? err : count;
+}
+
+static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev,
+					struct device_attribute *attr,
+					const char *buf, size_t count)
+{
+	struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
+	struct ssb_bus *bus;
+	u16 *sprom;
+	int res = 0, err = -ENODEV;
+
+	bus = ssb_pci_dev_to_bus(pdev);
+	if (!bus)
+		goto out;
+	err = -ENOMEM;
+	sprom = kcalloc(bus->sprom_size, sizeof(u16), GFP_KERNEL);
+	if (!sprom)
+		goto out;
+	err = hex2sprom(sprom, buf, count, bus->sprom_size);
+	if (err) {
+		err = -EINVAL;
+		goto out_kfree;
+	}
+	err = sprom_check_crc(sprom, bus->sprom_size);
+	if (err) {
+		err = -EINVAL;
+		goto out_kfree;
+	}
+
+	/* Use interruptible locking, as the SPROM write might
+	 * be holding the lock for several seconds. So allow userspace
+	 * to cancel operation. */
+	err = -ERESTARTSYS;
+	if (mutex_lock_interruptible(&bus->pci_sprom_mutex))
+		goto out_kfree;
+	err = ssb_devices_freeze(bus);
+	if (err == -EOPNOTSUPP) {
+		ssb_printk(KERN_ERR PFX "SPROM write: Could not freeze devices. "
+			   "No suspend support. Is CONFIG_PM enabled?\n");
+		goto out_unlock;
+	}
+	if (err) {
+		ssb_printk(KERN_ERR PFX "SPROM write: Could not freeze all devices\n");
+		goto out_unlock;
+	}
+	res = sprom_do_write(bus, sprom);
+	err = ssb_devices_thaw(bus);
+	if (err)
+		ssb_printk(KERN_ERR PFX "SPROM write: Could not thaw all devices\n");
+out_unlock:
+	mutex_unlock(&bus->pci_sprom_mutex);
+out_kfree:
+	kfree(sprom);
+out:
+	if (res)
+		return res;
+	return err ? err : count;
+}
+
+static DEVICE_ATTR(ssb_sprom, 0600,
+		   ssb_pci_attr_sprom_show,
+		   ssb_pci_attr_sprom_store);
+
+void ssb_pci_exit(struct ssb_bus *bus)
+{
+	struct pci_dev *pdev;
+
+	if (bus->bustype != SSB_BUSTYPE_PCI)
+		return;
+
+	pdev = bus->host_pci;
+	device_remove_file(&pdev->dev, &dev_attr_ssb_sprom);
+}
+
+int ssb_pci_init(struct ssb_bus *bus)
+{
+	struct pci_dev *pdev;
+	int err;
+
+	if (bus->bustype != SSB_BUSTYPE_PCI)
+		return 0;
+
+	pdev = bus->host_pci;
+	mutex_init(&bus->pci_sprom_mutex);
+	err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom);
+	if (err)
+		goto out;
+
+out:
+	return err;
+}