MERGE-via-pending-tracking-hist-MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040-1232632141

pending-tracking-hist top was MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040-1232632141 / fdf777a63bcb59e0dfd78bfe2c6242e01f6d4eb9 ... parent commitmessage:
From: merge <null@invalid>
MERGE-via-stable-tracking-hist-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040

stable-tracking-hist top was MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040 / 90463bfd2d5a3c8b52f6e6d71024a00e052b0ced ... parent commitmessage:
From: merge <null@invalid>
MERGE-via-mokopatches-tracking-hist-fix-stray-endmenu-patch

mokopatches-tracking-hist top was fix-stray-endmenu-patch / 3630e0be570de8057e7f8d2fe501ed353cdf34e6 ... parent commitmessage:
From: Andy Green <andy@openmoko.com>
fix-stray-endmenu.patch

Signed-off-by: Andy Green <andy@openmoko.com>

1 files changed, 153 insertions, 72 deletions

diff --git a/drivers/net/sfc/sfe4001.c b/drivers/net/sfc/sfe4001.c
index fe4e3fd2233..16b80acb999 100644
--- a/drivers/net/sfc/sfe4001.c
+++ b/drivers/net/sfc/sfe4001.c
@@ -1,6 +1,6 @@
 /****************************************************************************
  * Driver for Solarflare Solarstorm network controllers and boards
- * Copyright 2007 Solarflare Communications Inc.
+ * Copyright 2007-2008 Solarflare Communications Inc.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 as published
@@ -8,10 +8,21 @@
  */
 
 /*****************************************************************************
- * Support for the SFE4001 NIC: driver code for the PCA9539 I/O expander that
- * controls the PHY power rails, and for the MAX6647 temp. sensor used to check
- * the PHY
+ * Support for the SFE4001 and SFN4111T NICs.
+ *
+ * The SFE4001 does not power-up fully at reset due to its high power
+ * consumption.  We control its power via a PCA9539 I/O expander.
+ * Both boards have a MAX6647 temperature monitor which we expose to
+ * the lm90 driver.
+ *
+ * This also provides minimal support for reflashing the PHY, which is
+ * initiated by resetting it with the FLASH_CFG_1 pin pulled down.
+ * On SFE4001 rev A2 and later this is connected to the 3V3X output of
+ * the IO-expander; on the SFN4111T it is connected to Falcon's GPIO3.
+ * We represent reflash mode as PHY_MODE_SPECIAL and make it mutually
+ * exclusive with the network device being open.
  */
+
 #include <linux/delay.h>
 #include "net_driver.h"
 #include "efx.h"
@@ -21,6 +32,7 @@
 #include "falcon_hwdefs.h"
 #include "falcon_io.h"
 #include "mac.h"
+#include "workarounds.h"
 
 /**************************************************************************
  *
@@ -65,48 +77,9 @@
 #define	P1_SPARE_LBN 4
 #define	P1_SPARE_WIDTH 4
 
-
-/**************************************************************************
- *
- * Temperature Sensor
- *
- **************************************************************************/
-#define	MAX6647	0x4e
-
-#define	RLTS	0x00
-#define	RLTE	0x01
-#define	RSL	0x02
-#define	RCL	0x03
-#define	RCRA	0x04
-#define	RLHN	0x05
-#define	RLLI	0x06
-#define	RRHI	0x07
-#define	RRLS	0x08
-#define	WCRW	0x0a
-#define	WLHO	0x0b
-#define	WRHA	0x0c
-#define	WRLN	0x0e
-#define	OSHT	0x0f
-#define	REET	0x10
-#define	RIET	0x11
-#define	RWOE	0x19
-#define	RWOI	0x20
-#define	HYS	0x21
-#define	QUEUE	0x22
-#define	MFID	0xfe
-#define	REVID	0xff
-
-/* Status bits */
-#define MAX6647_BUSY	(1 << 7)	/* ADC is converting */
-#define MAX6647_LHIGH	(1 << 6)	/* Local high temp. alarm */
-#define MAX6647_LLOW	(1 << 5)	/* Local low temp. alarm */
-#define MAX6647_RHIGH	(1 << 4)	/* Remote high temp. alarm */
-#define MAX6647_RLOW	(1 << 3)	/* Remote low temp. alarm */
-#define MAX6647_FAULT	(1 << 2)	/* DXN/DXP short/open circuit */
-#define MAX6647_EOT	(1 << 1)	/* Remote junction overtemp. */
-#define MAX6647_IOT	(1 << 0)	/* Local junction overtemp. */
-
-static const u8 xgphy_max_temperature = 90;
+/* Temperature Sensor */
+#define MAX664X_REG_RSL		0x02
+#define MAX664X_REG_WLHO	0x0B
 
 static void sfe4001_poweroff(struct efx_nic *efx)
 {
@@ -119,7 +92,7 @@ static void sfe4001_poweroff(struct efx_nic *efx)
 	i2c_smbus_write_byte_data(ioexp_client, P0_CONFIG, 0xff);
 
 	/* Clear any over-temperature alert */
-	i2c_smbus_read_byte_data(hwmon_client, RSL);
+	i2c_smbus_read_byte_data(hwmon_client, MAX664X_REG_RSL);
 }
 
 static int sfe4001_poweron(struct efx_nic *efx)
@@ -131,7 +104,7 @@ static int sfe4001_poweron(struct efx_nic *efx)
 	u8 out;
 
 	/* Clear any previous over-temperature alert */
-	rc = i2c_smbus_read_byte_data(hwmon_client, RSL);
+	rc = i2c_smbus_read_byte_data(hwmon_client, MAX664X_REG_RSL);
 	if (rc < 0)
 		return rc;
 
@@ -209,10 +182,29 @@ fail_on:
 	return rc;
 }
 
-/* On SFE4001 rev A2 and later, we can control the FLASH_CFG_1 pin
- * using the 3V3X output of the IO-expander.  Allow the user to set
- * this when the device is stopped, and keep it stopped then.
- */
+static int sfn4111t_reset(struct efx_nic *efx)
+{
+	efx_oword_t reg;
+
+	/* GPIO pins are also used for I2C, so block that temporarily */
+	mutex_lock(&efx->i2c_adap.bus_lock);
+
+	falcon_read(efx, &reg, GPIO_CTL_REG_KER);
+	EFX_SET_OWORD_FIELD(reg, GPIO2_OEN, true);
+	EFX_SET_OWORD_FIELD(reg, GPIO2_OUT, false);
+	falcon_write(efx, &reg, GPIO_CTL_REG_KER);
+	msleep(1000);
+	EFX_SET_OWORD_FIELD(reg, GPIO2_OUT, true);
+	EFX_SET_OWORD_FIELD(reg, GPIO3_OEN, true);
+	EFX_SET_OWORD_FIELD(reg, GPIO3_OUT,
+			    !(efx->phy_mode & PHY_MODE_SPECIAL));
+	falcon_write(efx, &reg, GPIO_CTL_REG_KER);
+
+	mutex_unlock(&efx->i2c_adap.bus_lock);
+
+	ssleep(1);
+	return 0;
+}
 
 static ssize_t show_phy_flash_cfg(struct device *dev,
 				  struct device_attribute *attr, char *buf)
@@ -241,7 +233,10 @@ static ssize_t set_phy_flash_cfg(struct device *dev,
 		err = -EBUSY;
 	} else {
 		efx->phy_mode = new_mode;
-		err = sfe4001_poweron(efx);
+		if (efx->board_info.type == EFX_BOARD_SFE4001)
+			err = sfe4001_poweron(efx);
+		else
+			err = sfn4111t_reset(efx);
 		efx_reconfigure_port(efx);
 	}
 	rtnl_unlock();
@@ -261,35 +256,62 @@ static void sfe4001_fini(struct efx_nic *efx)
 	i2c_unregister_device(efx->board_info.hwmon_client);
 }
 
+static int sfe4001_check_hw(struct efx_nic *efx)
+{
+	s32 status;
+
+	/* If XAUI link is up then do not monitor */
+	if (EFX_WORKAROUND_7884(efx) && efx->mac_up)
+		return 0;
+
+	/* Check the powered status of the PHY. Lack of power implies that
+	 * the MAX6647 has shut down power to it, probably due to a temp.
+	 * alarm. Reading the power status rather than the MAX6647 status
+	 * directly because the later is read-to-clear and would thus
+	 * start to power up the PHY again when polled, causing us to blip
+	 * the power undesirably.
+	 * We know we can read from the IO expander because we did
+	 * it during power-on. Assume failure now is bad news. */
+	status = i2c_smbus_read_byte_data(efx->board_info.ioexp_client, P1_IN);
+	if (status >= 0 &&
+	    (status & ((1 << P1_AFE_PWD_LBN) | (1 << P1_DSP_PWD25_LBN))) != 0)
+		return 0;
+
+	/* Use board power control, not PHY power control */
+	sfe4001_poweroff(efx);
+	efx->phy_mode = PHY_MODE_OFF;
+
+	return (status < 0) ? -EIO : -ERANGE;
+}
+
+static struct i2c_board_info sfe4001_hwmon_info = {
+	I2C_BOARD_INFO("max6647", 0x4e),
+	.irq		= -1,
+};
+
 /* This board uses an I2C expander to provider power to the PHY, which needs to
  * be turned on before the PHY can be used.
  * Context: Process context, rtnl lock held
  */
 int sfe4001_init(struct efx_nic *efx)
 {
-	struct i2c_client *hwmon_client;
 	int rc;
 
-	hwmon_client = i2c_new_dummy(&efx->i2c_adap, MAX6647);
-	if (!hwmon_client)
+#if defined(CONFIG_SENSORS_LM90) || defined(CONFIG_SENSORS_LM90_MODULE)
+	efx->board_info.hwmon_client =
+		i2c_new_device(&efx->i2c_adap, &sfe4001_hwmon_info);
+#else
+	efx->board_info.hwmon_client =
+		i2c_new_dummy(&efx->i2c_adap, sfe4001_hwmon_info.addr);
+#endif
+	if (!efx->board_info.hwmon_client)
 		return -EIO;
-	efx->board_info.hwmon_client = hwmon_client;
 
-	/* Set DSP over-temperature alert threshold */
-	EFX_INFO(efx, "DSP cut-out at %dC\n", xgphy_max_temperature);
-	rc = i2c_smbus_write_byte_data(hwmon_client, WLHO,
-				       xgphy_max_temperature);
+	/* Raise board/PHY high limit from 85 to 90 degrees Celsius */
+	rc = i2c_smbus_write_byte_data(efx->board_info.hwmon_client,
+				       MAX664X_REG_WLHO, 90);
 	if (rc)
-		goto fail_ioexp;
-
-	/* Read it back and verify */
-	rc = i2c_smbus_read_byte_data(hwmon_client, RLHN);
-	if (rc < 0)
-		goto fail_ioexp;
-	if (rc != xgphy_max_temperature) {
-		rc = -EFAULT;
-		goto fail_ioexp;
-	}
+		goto fail_hwmon;
 
 	efx->board_info.ioexp_client = i2c_new_dummy(&efx->i2c_adap, PCA9539);
 	if (!efx->board_info.ioexp_client) {
@@ -301,6 +323,7 @@ int sfe4001_init(struct efx_nic *efx)
 	 * blink code. */
 	efx->board_info.blink = tenxpress_phy_blink;
 
+	efx->board_info.monitor = sfe4001_check_hw;
 	efx->board_info.fini = sfe4001_fini;
 
 	rc = sfe4001_poweron(efx);
@@ -319,6 +342,64 @@ fail_on:
 fail_ioexp:
 	i2c_unregister_device(efx->board_info.ioexp_client);
 fail_hwmon:
-	i2c_unregister_device(hwmon_client);
+	i2c_unregister_device(efx->board_info.hwmon_client);
+	return rc;
+}
+
+static int sfn4111t_check_hw(struct efx_nic *efx)
+{
+	s32 status;
+
+	/* If XAUI link is up then do not monitor */
+	if (EFX_WORKAROUND_7884(efx) && efx->mac_up)
+		return 0;
+
+	/* Test LHIGH, RHIGH, FAULT, EOT and IOT alarms */
+	status = i2c_smbus_read_byte_data(efx->board_info.hwmon_client,
+					  MAX664X_REG_RSL);
+	if (status < 0)
+		return -EIO;
+	if (status & 0x57)
+		return -ERANGE;
+	return 0;
+}
+
+static void sfn4111t_fini(struct efx_nic *efx)
+{
+	EFX_INFO(efx, "%s\n", __func__);
+
+	device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_flash_cfg);
+	i2c_unregister_device(efx->board_info.hwmon_client);
+}
+
+static struct i2c_board_info sfn4111t_hwmon_info = {
+	I2C_BOARD_INFO("max6647", 0x4e),
+	.irq		= -1,
+};
+
+int sfn4111t_init(struct efx_nic *efx)
+{
+	int rc;
+
+	efx->board_info.hwmon_client =
+		i2c_new_device(&efx->i2c_adap, &sfn4111t_hwmon_info);
+	if (!efx->board_info.hwmon_client)
+		return -EIO;
+
+	efx->board_info.blink = tenxpress_phy_blink;
+	efx->board_info.monitor = sfn4111t_check_hw;
+	efx->board_info.fini = sfn4111t_fini;
+
+	rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_flash_cfg);
+	if (rc)
+		goto fail_hwmon;
+
+	if (efx->phy_mode & PHY_MODE_SPECIAL)
+		sfn4111t_reset(efx);
+
+	return 0;
+
+fail_hwmon:
+	i2c_unregister_device(efx->board_info.hwmon_client);
 	return rc;
 }