x86: Add sp5100_tco AMD patches

This adds the following patches to the x86 target:

sp5100_tco: Add AMD Mullins platform support
sp5100_tco: Add AMD Carrizo platform support
sp5100_tco: fix the device check for SB800 and later chipsets
watchdog: sp5100_tco: properly check for new register layouts

With these added, the sp5100_tco driver can then be used on newer AMD
platforms, such as the PCEngines APU2/APU3 boards.

Signed-off-by: Chris Blake <chrisrblake93@gmail.com>

4 files changed, 217 insertions, 0 deletions

diff --git a/target/linux/x86/patches-4.4/097-0001-sp5100_tco-Add-AMD-Mullins-platform-support.patch b/target/linux/x86/patches-4.4/097-0001-sp5100_tco-Add-AMD-Mullins-platform-support.patch
new file mode 100644
index 0000000..ee88859
--- /dev/null
+++ b/target/linux/x86/patches-4.4/097-0001-sp5100_tco-Add-AMD-Mullins-platform-support.patch
@@ -0,0 +1,30 @@
+From 190aa4304de6fe2185d96392ddf56580fa133e99 Mon Sep 17 00:00:00 2001
+From: Denis Turischev <denis.turischev@compulab.co.il>
+Date: Tue, 24 Nov 2015 10:46:12 +0200
+Subject: [PATCH] sp5100_tco: Add AMD Mullins platform support
+
+AMD Mullins watchdog is fully compatible to the previous Hudson chipset,
+reuse the existent sp5100_tco driver.
+
+Signed-off-by: Denis Turischev <denis.turischev@compulab.co.il>
+Signed-off-by: Guenter Roeck <linux@roeck-us.net>
+Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
+---
+ drivers/watchdog/sp5100_tco.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c
+index eb8044e..ef039f8 100644
+--- a/drivers/watchdog/sp5100_tco.c
++++ b/drivers/watchdog/sp5100_tco.c
+@@ -306,6 +306,8 @@ static struct miscdevice sp5100_tco_miscdev = {
+ static const struct pci_device_id sp5100_tco_pci_tbl[] = {
+ 	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS, PCI_ANY_ID,
+ 	  PCI_ANY_ID, },
++	{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, PCI_ANY_ID,
++	  PCI_ANY_ID, },
+ 	{ 0, },			/* End of list */
+ };
+ MODULE_DEVICE_TABLE(pci, sp5100_tco_pci_tbl);
+--
+2.7.4
diff --git a/target/linux/x86/patches-4.4/097-0002-sp5100_tco-Add-AMD-Carrizo-platform-support.patch b/target/linux/x86/patches-4.4/097-0002-sp5100_tco-Add-AMD-Carrizo-platform-support.patch
new file mode 100644
index 0000000..664d4bb
--- /dev/null
+++ b/target/linux/x86/patches-4.4/097-0002-sp5100_tco-Add-AMD-Carrizo-platform-support.patch
@@ -0,0 +1,31 @@
+From cca118fa2a0a94e0f0b3c8dd1dda922cdee45089 Mon Sep 17 00:00:00 2001
+From: Huang Rui <ray.huang@amd.com>
+Date: Mon, 23 Nov 2015 18:07:36 +0800
+Subject: [PATCH] sp5100_tco: Add AMD Carrizo platform support
+
+sp5100_tco watchdog is also supported on AMD KernCZ chipset of Carrizo
+platform.
+
+Signed-off-by: Huang Rui <ray.huang@amd.com>
+Cc: Denis Turischev <denis.turischev@compulab.co.il>
+Signed-off-by: Guenter Roeck <linux@roeck-us.net>
+Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
+---
+ drivers/watchdog/sp5100_tco.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c
+index ef039f8..0ccadb4 100644
+--- a/drivers/watchdog/sp5100_tco.c
++++ b/drivers/watchdog/sp5100_tco.c
+@@ -308,6 +308,8 @@ static const struct pci_device_id sp5100_tco_pci_tbl[] = {
+ 	  PCI_ANY_ID, },
+ 	{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, PCI_ANY_ID,
+ 	  PCI_ANY_ID, },
++	{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_KERNCZ_SMBUS, PCI_ANY_ID,
++	  PCI_ANY_ID, },
+ 	{ 0, },			/* End of list */
+ };
+ MODULE_DEVICE_TABLE(pci, sp5100_tco_pci_tbl);
+--
+2.7.4
diff --git a/target/linux/x86/patches-4.4/097-0003-sp5100_tco-fix-the-device-check-for-SB800-and-later-chipsets.patch b/target/linux/x86/patches-4.4/097-0003-sp5100_tco-fix-the-device-check-for-SB800-and-later-chipsets.patch
new file mode 100644
index 0000000..e9f4513
--- /dev/null
+++ b/target/linux/x86/patches-4.4/097-0003-sp5100_tco-fix-the-device-check-for-SB800-and-later-chipsets.patch
@@ -0,0 +1,80 @@
+From bdecfcdb5461834aab24002bb18d3cbdd907b7fb Mon Sep 17 00:00:00 2001
+From: Huang Rui <ray.huang@amd.com>
+Date: Mon, 23 Nov 2015 18:07:35 +0800
+Subject: [PATCH] sp5100_tco: fix the device check for SB800 and later chipsets
+
+For SB800 and later chipsets, the register definitions are the same
+with SB800. And for SB700 and older chipsets, the definitions should
+be same with SP5100/SB7x0.
+
+Signed-off-by: Huang Rui <ray.huang@amd.com>
+Cc: Denis Turischev <denis.turischev@compulab.co.il>
+Signed-off-by: Guenter Roeck <linux@roeck-us.net>
+Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
+---
+ drivers/watchdog/sp5100_tco.c | 28 ++++++++++++++++------------
+ 1 file changed, 16 insertions(+), 12 deletions(-)
+
+diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c
+index 0ccadb4..6467b91 100644
+--- a/drivers/watchdog/sp5100_tco.c
++++ b/drivers/watchdog/sp5100_tco.c
+@@ -335,21 +335,24 @@ static unsigned char sp5100_tco_setupdevice(void)
+ 	if (!sp5100_tco_pci)
+ 		return 0;
+
+-	pr_info("PCI Revision ID: 0x%x\n", sp5100_tco_pci->revision);
++	pr_info("PCI Vendor ID: 0x%x, Device ID: 0x%x, Revision ID: 0x%x\n",
++		sp5100_tco_pci->vendor, sp5100_tco_pci->device,
++		sp5100_tco_pci->revision);
+
+ 	/*
+ 	 * Determine type of southbridge chipset.
+ 	 */
+-	if (sp5100_tco_pci->revision >= 0x40) {
+-		dev_name = SB800_DEVNAME;
+-		index_reg = SB800_IO_PM_INDEX_REG;
+-		data_reg = SB800_IO_PM_DATA_REG;
+-		base_addr = SB800_PM_WATCHDOG_BASE;
+-	} else {
++	if (sp5100_tco_pci->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS &&
++	    sp5100_tco_pci->revision < 0x40) {
+ 		dev_name = SP5100_DEVNAME;
+ 		index_reg = SP5100_IO_PM_INDEX_REG;
+ 		data_reg = SP5100_IO_PM_DATA_REG;
+ 		base_addr = SP5100_PM_WATCHDOG_BASE;
++	} else {
++		dev_name = SB800_DEVNAME;
++		index_reg = SB800_IO_PM_INDEX_REG;
++		data_reg = SB800_IO_PM_DATA_REG;
++		base_addr = SB800_PM_WATCHDOG_BASE;
+ 	}
+
+ 	/* Request the IO ports used by this driver */
+@@ -385,7 +388,12 @@ static unsigned char sp5100_tco_setupdevice(void)
+ 	 * Secondly, Find the watchdog timer MMIO address
+ 	 * from SBResource_MMIO register.
+ 	 */
+-	if (sp5100_tco_pci->revision >= 0x40) {
++	if (sp5100_tco_pci->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS &&
++	    sp5100_tco_pci->revision < 0x40) {
++		/* Read SBResource_MMIO from PCI config(PCI_Reg: 9Ch) */
++		pci_read_config_dword(sp5100_tco_pci,
++				      SP5100_SB_RESOURCE_MMIO_BASE, &val);
++	} else {
+ 		/* Read SBResource_MMIO from AcpiMmioEn(PM_Reg: 24h) */
+ 		outb(SB800_PM_ACPI_MMIO_EN+3, SB800_IO_PM_INDEX_REG);
+ 		val = inb(SB800_IO_PM_DATA_REG);
+@@ -395,10 +403,6 @@ static unsigned char sp5100_tco_setupdevice(void)
+ 		val = val << 8 | inb(SB800_IO_PM_DATA_REG);
+ 		outb(SB800_PM_ACPI_MMIO_EN+0, SB800_IO_PM_INDEX_REG);
+ 		val = val << 8 | inb(SB800_IO_PM_DATA_REG);
+-	} else {
+-		/* Read SBResource_MMIO from PCI config(PCI_Reg: 9Ch) */
+-		pci_read_config_dword(sp5100_tco_pci,
+-				      SP5100_SB_RESOURCE_MMIO_BASE, &val);
+ 	}
+
+ 	/* The SBResource_MMIO is enabled and mapped memory space? */
+--
+2.7.4
diff --git a/target/linux/x86/patches-4.4/097-0004-watchdog-sp5100_tco-properly-check-for-new-register-.patch b/target/linux/x86/patches-4.4/097-0004-watchdog-sp5100_tco-properly-check-for-new-register-.patch
new file mode 100644
index 0000000..cb7fe98
--- /dev/null
+++ b/target/linux/x86/patches-4.4/097-0004-watchdog-sp5100_tco-properly-check-for-new-register-.patch
@@ -0,0 +1,76 @@
+From 46856fabe40cc80f92134683cdec7dc0fc8f4000 Mon Sep 17 00:00:00 2001
+From: Lucas Stach <dev@lynxeye.de>
+Date: Tue, 3 May 2016 19:15:58 +0200
+Subject: [PATCH] watchdog: sp5100_tco: properly check for new register layouts
+
+Commits 190aa4304de6 (Add AMD Mullins platform support) and
+cca118fa2a0a94 (Add AMD Carrizo platform support) enabled the
+driver on a lot more devices, but the following commit missed
+a single location in the code when checking if the SB800 register
+offsets should be used. This leads to the wrong register being
+written which in turn causes ACPI to go haywire.
+
+Fix this by introducing a helper function to check for the new
+register layout and use this consistently.
+
+https://bugzilla.kernel.org/show_bug.cgi?id=114201
+https://bugzilla.redhat.com/show_bug.cgi?id=1329910
+Fixes: bdecfcdb5461 (sp5100_tco: fix the device check for SB800
+and later chipsets)
+Cc: stable@vger.kernel.org (4.5+)
+Signed-off-by: Lucas Stach <dev@lynxeye.de>
+Signed-off-by: Guenter Roeck <linux@roeck-us.net>
+Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
+---
+ drivers/watchdog/sp5100_tco.c | 15 ++++++++++-----
+ 1 file changed, 10 insertions(+), 5 deletions(-)
+
+diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c
+index 6467b91..028618c 100644
+--- a/drivers/watchdog/sp5100_tco.c
++++ b/drivers/watchdog/sp5100_tco.c
+@@ -73,6 +73,13 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started."
+ /*
+  * Some TCO specific functions
+  */
++
++static bool tco_has_sp5100_reg_layout(struct pci_dev *dev)
++{
++	return dev->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS &&
++	       dev->revision < 0x40;
++}
++
+ static void tco_timer_start(void)
+ {
+ 	u32 val;
+@@ -129,7 +136,7 @@ static void tco_timer_enable(void)
+ {
+ 	int val;
+
+-	if (sp5100_tco_pci->revision >= 0x40) {
++	if (!tco_has_sp5100_reg_layout(sp5100_tco_pci)) {
+ 		/* For SB800 or later */
+ 		/* Set the Watchdog timer resolution to 1 sec */
+ 		outb(SB800_PM_WATCHDOG_CONFIG, SB800_IO_PM_INDEX_REG);
+@@ -342,8 +349,7 @@ static unsigned char sp5100_tco_setupdevice(void)
+ 	/*
+ 	 * Determine type of southbridge chipset.
+ 	 */
+-	if (sp5100_tco_pci->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS &&
+-	    sp5100_tco_pci->revision < 0x40) {
++	if (tco_has_sp5100_reg_layout(sp5100_tco_pci)) {
+ 		dev_name = SP5100_DEVNAME;
+ 		index_reg = SP5100_IO_PM_INDEX_REG;
+ 		data_reg = SP5100_IO_PM_DATA_REG;
+@@ -388,8 +394,7 @@ static unsigned char sp5100_tco_setupdevice(void)
+ 	 * Secondly, Find the watchdog timer MMIO address
+ 	 * from SBResource_MMIO register.
+ 	 */
+-	if (sp5100_tco_pci->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS &&
+-	    sp5100_tco_pci->revision < 0x40) {
++	if (tco_has_sp5100_reg_layout(sp5100_tco_pci)) {
+ 		/* Read SBResource_MMIO from PCI config(PCI_Reg: 9Ch) */
+ 		pci_read_config_dword(sp5100_tco_pci,
+ 				      SP5100_SB_RESOURCE_MMIO_BASE, &val);
+--
+2.7.4