[32/36] Revert "ssb: Handle Netbook devices where the SPROM address is changed"

[Greg KH <gregkh@suse.de>]

2.6.34-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Greg Kroah-Hartman <gregkh@suse.de>

Turns out this isn't the best way to resolve this issue.  The
individual patches will be applied instead.

Cc: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 drivers/ssb/driver_chipcommon.c           |    3 -
 drivers/ssb/driver_chipcommon_pmu.c       |   17 ++++++-----
 drivers/ssb/pci.c                         |   46 +++---------------------------
 drivers/ssb/sprom.c                       |   15 ---------
 include/linux/ssb/ssb.h                   |    1 
 include/linux/ssb/ssb_driver_chipcommon.h |    2 -
 include/linux/ssb/ssb_regs.h              |    3 -
 7 files changed, 17 insertions(+), 70 deletions(-)

--- a/drivers/ssb/driver_chipcommon.c
+++ b/drivers/ssb/driver_chipcommon.c
@@ -233,9 +233,6 @@ void ssb_chipcommon_init(struct ssb_chip
 {
 	if (!cc->dev)
 		return; /* We don't have a ChipCommon */
-	if (cc->dev->id.revision >= 11)
-		cc->status = chipco_read32(cc, SSB_CHIPCO_CHIPSTAT);
-	ssb_dprintk(KERN_INFO PFX "chipcommon status is 0x%x\n", cc->status);
 	ssb_pmu_init(cc);
 	chipco_powercontrol_init(cc);
 	ssb_chipco_set_clockmode(cc, SSB_CLKMODE_FAST);
--- a/drivers/ssb/driver_chipcommon_pmu.c
+++ b/drivers/ssb/driver_chipcommon_pmu.c
@@ -502,9 +502,9 @@ static void ssb_pmu_resources_init(struc
 		chipco_write32(cc, SSB_CHIPCO_PMU_MAXRES_MSK, max_msk);
 }
 
-/* http://bcm-v4.sipsolutions.net/802.11/SSB/PmuInit */
 void ssb_pmu_init(struct ssb_chipcommon *cc)
 {
+	struct ssb_bus *bus = cc->dev->bus;
 	u32 pmucap;
 
 	if (!(cc->capabilities & SSB_CHIPCO_CAP_PMU))
@@ -516,12 +516,15 @@ void ssb_pmu_init(struct ssb_chipcommon
 	ssb_dprintk(KERN_DEBUG PFX "Found rev %u PMU (capabilities 0x%08X)\n",
 		    cc->pmu.rev, pmucap);
 
-	if (cc->pmu.rev == 1)
-		chipco_mask32(cc, SSB_CHIPCO_PMU_CTL,
-			      ~SSB_CHIPCO_PMU_CTL_NOILPONW);
-	else
-		chipco_set32(cc, SSB_CHIPCO_PMU_CTL,
-			     SSB_CHIPCO_PMU_CTL_NOILPONW);
+	if (cc->pmu.rev >= 1) {
+		if ((bus->chip_id == 0x4325) && (bus->chip_rev < 2)) {
+			chipco_mask32(cc, SSB_CHIPCO_PMU_CTL,
+				      ~SSB_CHIPCO_PMU_CTL_NOILPONW);
+		} else {
+			chipco_set32(cc, SSB_CHIPCO_PMU_CTL,
+				     SSB_CHIPCO_PMU_CTL_NOILPONW);
+		}
+	}
 	ssb_pmu_pll_init(cc);
 	ssb_pmu_resources_init(cc);
 }
--- a/drivers/ssb/pci.c
+++ b/drivers/ssb/pci.c
@@ -23,7 +23,6 @@
 
 #include "ssb_private.h"
 
-bool ssb_is_sprom_available(struct ssb_bus *bus);
 
 /* Define the following to 1 to enable a printk on each coreswitch. */
 #define SSB_VERBOSE_PCICORESWITCH_DEBUG		0
@@ -169,7 +168,7 @@ err_pci:
 }
 
 /* Get the word-offset for a SSB_SPROM_XXX define. */
-#define SPOFF(offset)	((offset) / sizeof(u16))
+#define SPOFF(offset)	(((offset) - SSB_SPROM_BASE) / sizeof(u16))
 /* Helper to extract some _offset, which is one of the SSB_SPROM_XXX defines. */
 #define SPEX16(_outvar, _offset, _mask, _shift)	\
 	out->_outvar = ((in[SPOFF(_offset)] & (_mask)) >> (_shift))
@@ -254,13 +253,8 @@ static int sprom_do_read(struct ssb_bus
 {
 	int i;
 
-	/* Check if SPROM can be read */
-	if (ioread16(bus->mmio + bus->sprom_offset) == 0xFFFF) {
-		ssb_printk(KERN_ERR PFX "Unable to read SPROM\n");
-		return -ENODEV;
-	}
 	for (i = 0; i < bus->sprom_size; i++)
-		sprom[i] = ioread16(bus->mmio + bus->sprom_offset + (i * 2));
+		sprom[i] = ioread16(bus->mmio + SSB_SPROM_BASE + (i * 2));
 
 	return 0;
 }
@@ -291,7 +285,7 @@ static int sprom_do_write(struct ssb_bus
 			ssb_printk("75%%");
 		else if (i % 2)
 			ssb_printk(".");
-		writew(sprom[i], bus->mmio + bus->sprom_offset + (i * 2));
+		writew(sprom[i], bus->mmio + SSB_SPROM_BASE + (i * 2));
 		mmiowb();
 		msleep(20);
 	}
@@ -627,49 +621,21 @@ static int ssb_pci_sprom_get(struct ssb_
 	int err = -ENOMEM;
 	u16 *buf;
 
-	if (!ssb_is_sprom_available(bus)) {
-		ssb_printk(KERN_ERR PFX "No SPROM available!\n");
-		return -ENODEV;
-	}
-	if (bus->chipco.dev) {	/* can be unavailible! */
-		/*
-		 * get SPROM offset: SSB_SPROM_BASE1 except for
-		 * chipcommon rev >= 31 or chip ID is 0x4312 and
-		 * chipcommon status & 3 == 2
-		 */
-		if (bus->chipco.dev->id.revision >= 31)
-			bus->sprom_offset = SSB_SPROM_BASE31;
-		else if (bus->chip_id == 0x4312 &&
-			 (bus->chipco.status & 0x03) == 2)
-			bus->sprom_offset = SSB_SPROM_BASE31;
-		else
-			bus->sprom_offset = SSB_SPROM_BASE1;
-	} else {
-		bus->sprom_offset = SSB_SPROM_BASE1;
-	}
-	ssb_dprintk(KERN_INFO PFX "SPROM offset is 0x%x\n", bus->sprom_offset);
-
 	buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
 	if (!buf)
 		goto out;
 	bus->sprom_size = SSB_SPROMSIZE_WORDS_R123;
-	err = sprom_do_read(bus, buf);
-	if (err)
-		goto out_free;
+	sprom_do_read(bus, buf);
 	err = sprom_check_crc(buf, bus->sprom_size);
 	if (err) {
 		/* try for a 440 byte SPROM - revision 4 and higher */
 		kfree(buf);
 		buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
 			      GFP_KERNEL);
-		if (!buf) {
-			err = -ENOMEM;
+		if (!buf)
 			goto out;
-		}
 		bus->sprom_size = SSB_SPROMSIZE_WORDS_R4;
-		err = sprom_do_read(bus, buf);
-		if (err)
-			goto out_free;
+		sprom_do_read(bus, buf);
 		err = sprom_check_crc(buf, bus->sprom_size);
 		if (err) {
 			/* All CRC attempts failed.
--- a/drivers/ssb/sprom.c
+++ b/drivers/ssb/sprom.c
@@ -176,18 +176,3 @@ const struct ssb_sprom *ssb_get_fallback
 {
 	return fallback_sprom;
 }
-
-/* http://bcm-v4.sipsolutions.net/802.11/IsSpromAvailable */
-bool ssb_is_sprom_available(struct ssb_bus *bus)
-{
-	/* status register only exists on chipcomon rev >= 11 and we need check
-	   for >= 31 only */
-	/* this routine differs from specs as we do not access SPROM directly
-	   on PCMCIA */
-	if (bus->bustype == SSB_BUSTYPE_PCI &&
-	    bus->chipco.dev &&	/* can be unavailible! */
-	    bus->chipco.dev->id.revision >= 31)
-		return bus->chipco.capabilities & SSB_CHIPCO_CAP_SPROM;
-
-	return true;
-}
--- a/include/linux/ssb/ssb.h
+++ b/include/linux/ssb/ssb.h
@@ -306,7 +306,6 @@ struct ssb_bus {
 	u16 chip_id;
 	u16 chip_rev;
 	u16 sprom_size;		/* number of words in sprom */
-	u16 sprom_offset;
 	u8 chip_package;
 
 	/* List of devices (cores) on the backplane. */
--- a/include/linux/ssb/ssb_driver_chipcommon.h
+++ b/include/linux/ssb/ssb_driver_chipcommon.h
@@ -46,7 +46,6 @@
 #define   SSB_PLLTYPE_7			0x00038000	/* 25Mhz, 4 dividers */
 #define  SSB_CHIPCO_CAP_PCTL		0x00040000	/* Power Control */
 #define  SSB_CHIPCO_CAP_OTPS		0x00380000	/* OTP size */
-#define  SSB_CHIPCO_CAP_SPROM		0x40000000	/* SPROM present */
 #define  SSB_CHIPCO_CAP_OTPS_SHIFT	19
 #define  SSB_CHIPCO_CAP_OTPS_BASE	5
 #define  SSB_CHIPCO_CAP_JTAGM		0x00400000	/* JTAG master present */
@@ -565,7 +564,6 @@ struct ssb_chipcommon_pmu {
 struct ssb_chipcommon {
 	struct ssb_device *dev;
 	u32 capabilities;
-	u32 status;
 	/* Fast Powerup Delay constant */
 	u16 fast_pwrup_delay;
 	struct ssb_chipcommon_pmu pmu;
--- a/include/linux/ssb/ssb_regs.h
+++ b/include/linux/ssb/ssb_regs.h
@@ -170,8 +170,7 @@
 #define SSB_SPROMSIZE_WORDS_R4		220
 #define SSB_SPROMSIZE_BYTES_R123	(SSB_SPROMSIZE_WORDS_R123 * sizeof(u16))
 #define SSB_SPROMSIZE_BYTES_R4		(SSB_SPROMSIZE_WORDS_R4 * sizeof(u16))
-#define SSB_SPROM_BASE1			0x1000
-#define SSB_SPROM_BASE31		0x0800
+#define SSB_SPROM_BASE			0x1000
 #define SSB_SPROM_REVISION		0x107E
 #define  SSB_SPROM_REVISION_REV		0x00FF	/* SPROM Revision number */
 #define  SSB_SPROM_REVISION_CRC		0xFF00	/* SPROM CRC8 value */