[lantiq] Add ath9k eeprom and pci fixup support

Add ath9k eeprom and pci fixup support (again) for linux 3.7.

On linux 3.3, the fixup forced the regdomain to 0x67, causing low TX power.
This patch only corrects checksum, the rest of the EEPROM isn't changed.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35353 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 252 insertions, 39 deletions

diff --git a/target/linux/lantiq/image/ARV7518PW.dts b/target/linux/lantiq/image/ARV7518PW.dts
index 532b00a66..cbebd70aa 100644
--- a/target/linux/lantiq/image/ARV7518PW.dts
+++ b/target/linux/lantiq/image/ARV7518PW.dts
@@ -72,7 +72,9 @@
 				reg = <0 0x7f0400 0x800
 					0 0x7f0016 0x6>;
 				ath,mac-increment = <1>;
+				ath,pci-slot = <14>;
 				ath,eep-swap;
+				ath,eep-csum;
 			};
 		};
 
diff --git a/target/linux/lantiq/patches-3.7/0302-wifi-eep.patch b/target/linux/lantiq/patches-3.7/0302-wifi-eep.patch
index 54a8acd1e..429d0e92c 100644
--- a/target/linux/lantiq/patches-3.7/0302-wifi-eep.patch
+++ b/target/linux/lantiq/patches-3.7/0302-wifi-eep.patch
@@ -1,22 +1,24 @@
-Index: linux-3.7-rc8/arch/mips/lantiq/xway/Makefile
+Index: linux-3.7.4/arch/mips/lantiq/xway/Makefile
 ===================================================================
---- linux-3.7-rc8.orig/arch/mips/lantiq/xway/Makefile	2012-12-13 10:59:54.176314899 +0100
-+++ linux-3.7-rc8/arch/mips/lantiq/xway/Makefile	2012-12-13 13:58:51.696584083 +0100
+--- linux-3.7.4.orig/arch/mips/lantiq/xway/Makefile	2013-01-28 18:08:39.000000000 +0100
++++ linux-3.7.4/arch/mips/lantiq/xway/Makefile	2013-01-28 18:10:31.416141818 +0100
 @@ -1,3 +1,6 @@
  obj-y := prom.o sysctrl.o clk.o reset.o dma.o timer.o dcdc.o
  
 +obj-y += eth_mac.o
-+obj-$(CONFIG_PCI) += ath_eep.o rt_eep.o
++obj-$(CONFIG_PCI) += ath_eep.o rt_eep.o pci-ath-fixup.o
 +
  obj-$(CONFIG_XRX200_PHY_FW) += xrx200_phy_fw.o
-Index: linux-3.7-rc8/arch/mips/lantiq/xway/ath_eep.c
+Index: linux-3.7.4/arch/mips/lantiq/xway/ath_eep.c
 ===================================================================
 --- /dev/null	1970-01-01 00:00:00.000000000 +0000
-+++ linux-3.7-rc8/arch/mips/lantiq/xway/ath_eep.c	2012-12-13 13:49:12.472569552 +0100
-@@ -0,0 +1,120 @@
++++ linux-3.7.4/arch/mips/lantiq/xway/ath_eep.c	2013-01-28 18:13:43.256146389 +0100
+@@ -0,0 +1,206 @@
 +/*
++ *  Copyright (C) 2011 Luca Olivetti <luca@ventoso.org>
 + *  Copyright (C) 2011 John Crispin <blogic@openwrt.org>
 + *  Copyright (C) 2011 Andrej Vlašić <andrej.vlasic0@gmail.com>
++ *  Copyright (C) 2013 Álvaro Fernández Rojas <noltari@gmail.com>
 + *
 + *  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
@@ -30,32 +32,116 @@ Index: linux-3.7-rc8/arch/mips/lantiq/xway/ath_eep.c
 +#include <linux/ath5k_platform.h>
 +#include <linux/ath9k_platform.h>
 +#include <linux/pci.h>
++#include <pci-ath-fixup.h>
 +
 +extern int (*ltq_pci_plat_dev_init)(struct pci_dev *dev);
 +struct ath5k_platform_data ath5k_pdata;
-+/*struct ath9k_platform_data ath9k_pdata = {
++struct ath9k_platform_data ath9k_pdata = {
 +	.led_pin = -1,
-+	.endian_check = true,
-+};*/
++};
 +static u16 ath5k_eeprom_data[ATH5K_PLAT_EEP_MAX_WORDS];
-+//static u16 ath9k_eeprom_data[ATH9K_PLAT_EEP_MAX_WORDS];
 +static u8 athxk_eeprom_mac[6];
 +
-+/*static int
-+ath9k_pci_plat_dev_init(struct pci_dev *dev)
++static int ath9k_pci_plat_dev_init(struct pci_dev *dev)
 +{
 +	dev->dev.platform_data = &ath9k_pdata;
 +	return 0;
 +}
 +
-+void __init
-+ltq_register_ath9k(u16 *eeprom_data, u8 *macaddr)
++int __init of_ath9k_eeprom_probe(struct platform_device *pdev)
 +{
-+	memcpy(ath9k_pdata.eeprom_data, eeprom_data, sizeof(ath9k_pdata.eeprom_data));
-+	ath9k_pdata.macaddr = macaddr;
++	struct device_node *np = pdev->dev.of_node;
++	struct resource *eep_res, *mac_res;
++	void __iomem *eep, *mac;
++	int mac_offset;
++	u32 mac_inc = 0, pci_slot = 0;
++	int i;
++	u16 *eepdata, sum, el;
++
++	eep_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	mac_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
++
++	if (!eep_res) {
++		dev_err(&pdev->dev, "failed to load eeprom address\n");
++		return -ENODEV;
++	}
++	if (resource_size(eep_res) != ATH9K_PLAT_EEP_MAX_WORDS) {
++		dev_err(&pdev->dev, "eeprom has an invalid size\n");
++		return -EINVAL;
++	}
++
++	eep = ioremap(eep_res->start, resource_size(eep_res));
++	memcpy_fromio(ath9k_pdata.eeprom_data, eep, ATH9K_PLAT_EEP_MAX_WORDS);
++
++	if (of_find_property(np, "ath,eep-swap", NULL)) {
++		ath9k_pdata.endian_check = true;
++
++		dev_info(&pdev->dev, "endian check enabled.\n");
++	}
++
++	if (of_find_property(np, "ath,eep-csum", NULL)) {
++		sum = ath9k_pdata.eeprom_data[0x200>>1];
++		el = sum / sizeof(u16) - 2;  /* skip length and (old) checksum */
++		eepdata = (u16 *) (&ath9k_pdata.eeprom_data[0x204>>1]); /* after checksum */
++		for (i = 0; i < el; i++)
++			sum ^= *eepdata++;
++		sum ^= 0xffff;
++		ath9k_pdata.eeprom_data[0x202>>1] = sum;
++
++		dev_info(&pdev->dev, "checksum fixed.\n");
++	}
++
++	if (!of_property_read_u32(np, "ath,mac-offset", &mac_offset)) {
++		memcpy_fromio(athxk_eeprom_mac, (void*) ath9k_pdata.eeprom_data, 6);
++	} else if (mac_res) {
++		if (resource_size(mac_res) != 6) {
++			dev_err(&pdev->dev, "mac has an invalid size\n");
++			return -EINVAL;
++		}
++		mac = ioremap(mac_res->start, resource_size(mac_res));
++		memcpy_fromio(athxk_eeprom_mac, mac, 6);
++	} else {
++		dev_warn(&pdev->dev, "using random mac\n");
++		random_ether_addr(athxk_eeprom_mac);
++	}
++
++	if (!of_property_read_u32(np, "ath,mac-increment", &mac_inc))
++		athxk_eeprom_mac[5] += mac_inc;
++
++	ath9k_pdata.macaddr = athxk_eeprom_mac;
 +	ltq_pci_plat_dev_init = ath9k_pci_plat_dev_init;
++
++	if (!of_property_read_u32(np, "ath,pci-slot", &pci_slot)) {
++		ltq_pci_ath_fixup(pci_slot, ath9k_pdata.eeprom_data);
++
++		dev_info(&pdev->dev, "pci slot: %u\n", pci_slot);
++	}
++
++	dev_info(&pdev->dev, "loaded ath9k eeprom\n");
++
++	return 0;
 +}
-+*/
++
++static struct of_device_id ath9k_eeprom_ids[] = {
++	{ .compatible = "ath9k,eeprom" },
++	{ }
++};
++
++static struct platform_driver ath9k_eeprom_driver = {
++	.driver		= {
++		.name		= "ath9k,eeprom",
++		.owner	= THIS_MODULE,
++		.of_match_table	= of_match_ptr(ath9k_eeprom_ids),
++	},
++};
++
++static int __init of_ath9k_eeprom_init(void)
++{
++	return platform_driver_probe(&ath9k_eeprom_driver, of_ath9k_eeprom_probe);
++}
++arch_initcall(of_ath9k_eeprom_init);
++
++
 +static int ath5k_pci_plat_dev_init(struct pci_dev *dev)
 +{
 +	dev->dev.platform_data = &ath5k_pdata;
@@ -134,23 +220,23 @@ Index: linux-3.7-rc8/arch/mips/lantiq/xway/ath_eep.c
 +	return platform_driver_probe(&ath5k_eeprom_driver, of_ath5k_eeprom_probe);
 +}
 +device_initcall(of_ath5k_eeprom_init);
-Index: linux-3.7-rc8/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
+Index: linux-3.7.4/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
 ===================================================================
---- linux-3.7-rc8.orig/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h	2012-12-13 10:59:57.300314976 +0100
-+++ linux-3.7-rc8/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h	2012-12-13 10:59:57.308314977 +0100
-@@ -93,5 +93,8 @@
- /* allow tapi driver to read the gptu value */
- long gptu_get_count(struct clk *clk);
+--- linux-3.7.4.orig/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h	2013-01-28 18:08:38.000000000 +0100
++++ linux-3.7.4/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h	2013-01-28 18:10:03.616141155 +0100
+@@ -90,5 +90,8 @@
+ extern void ltq_pmu_enable(unsigned int module);
+ extern void ltq_pmu_disable(unsigned int module);
  
 +/* allow the ethernet driver to load a flash mapped mac addr */
 +const u8* ltq_get_eth_mac(void);
 +
  #endif /* CONFIG_SOC_TYPE_XWAY */
  #endif /* _LTQ_XWAY_H__ */
-Index: linux-3.7-rc8/arch/mips/lantiq/xway/eth_mac.c
+Index: linux-3.7.4/arch/mips/lantiq/xway/eth_mac.c
 ===================================================================
 --- /dev/null	1970-01-01 00:00:00.000000000 +0000
-+++ linux-3.7-rc8/arch/mips/lantiq/xway/eth_mac.c	2012-12-13 10:59:57.308314977 +0100
++++ linux-3.7.4/arch/mips/lantiq/xway/eth_mac.c	2013-01-28 18:10:03.620141154 +0100
 @@ -0,0 +1,76 @@
 +/*
 + *  Copyright (C) 2012 John Crispin <blogic@openwrt.org>
@@ -228,11 +314,11 @@ Index: linux-3.7-rc8/arch/mips/lantiq/xway/eth_mac.c
 +	return platform_driver_probe(&eth_mac_driver, of_eth_mac_probe);
 +}
 +device_initcall(of_eth_mac_init);
-Index: linux-3.7-rc8/drivers/net/ethernet/lantiq_etop.c
+Index: linux-3.7.4/drivers/net/ethernet/lantiq_etop.c
 ===================================================================
---- linux-3.7-rc8.orig/drivers/net/ethernet/lantiq_etop.c	2012-12-13 10:59:54.176314899 +0100
-+++ linux-3.7-rc8/drivers/net/ethernet/lantiq_etop.c	2012-12-13 10:59:57.308314977 +0100
-@@ -816,7 +816,8 @@
+--- linux-3.7.4.orig/drivers/net/ethernet/lantiq_etop.c	2013-01-28 18:08:39.000000000 +0100
++++ linux-3.7.4/drivers/net/ethernet/lantiq_etop.c	2013-01-28 18:10:03.620141154 +0100
+@@ -825,7 +825,8 @@
  
  	ltq_etop_change_mtu(dev, 1500);
  
@@ -242,7 +328,7 @@ Index: linux-3.7-rc8/drivers/net/ethernet/lantiq_etop.c
  	if (!is_valid_ether_addr(mac.sa_data)) {
  		pr_warn("etop: invalid MAC, using random\n");
  		random_ether_addr(mac.sa_data);
-@@ -940,7 +941,9 @@
+@@ -949,7 +950,9 @@
  	priv->tx_irq = irqres[0].start;
  	priv->rx_irq = irqres[1].start;
  	priv->mii_mode = of_get_phy_mode(pdev->dev.of_node);
@@ -253,10 +339,10 @@ Index: linux-3.7-rc8/drivers/net/ethernet/lantiq_etop.c
  
  	priv->clk_ppe = clk_get(&pdev->dev, NULL);
  	if (IS_ERR(priv->clk_ppe))
-Index: linux-3.7-rc8/arch/mips/lantiq/xway/rt_eep.c
+Index: linux-3.7.4/arch/mips/lantiq/xway/rt_eep.c
 ===================================================================
 --- /dev/null	1970-01-01 00:00:00.000000000 +0000
-+++ linux-3.7-rc8/arch/mips/lantiq/xway/rt_eep.c	2012-12-13 13:55:43.132579350 +0100
++++ linux-3.7.4/arch/mips/lantiq/xway/rt_eep.c	2013-01-28 18:10:03.620141154 +0100
 @@ -0,0 +1,60 @@
 +/*
 + *  Copyright (C) 2011 John Crispin <blogic@openwrt.org>
@@ -318,3 +404,128 @@ Index: linux-3.7-rc8/arch/mips/lantiq/xway/rt_eep.c
 +	return platform_driver_probe(&ralink_eeprom_driver, of_ralink_eeprom_probe);
 +}
 +device_initcall(of_ralink_eeprom_init);
+Index: linux-3.7.4/arch/mips/include/asm/mach-lantiq/pci-ath-fixup.h
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-3.7.4/arch/mips/include/asm/mach-lantiq/pci-ath-fixup.h	2013-01-28 18:10:03.620141154 +0100
+@@ -0,0 +1,6 @@
++#ifndef _PCI_ATH_FIXUP
++#define _PCI_ATH_FIXUP
++
++void ltq_pci_ath_fixup(unsigned slot, u16 *cal_data) __init;
++
++#endif /* _PCI_ATH_FIXUP */
+Index: linux-3.7.4/arch/mips/lantiq/xway/pci-ath-fixup.c
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-3.7.4/arch/mips/lantiq/xway/pci-ath-fixup.c	2013-01-28 18:10:03.624141153 +0100
+@@ -0,0 +1,109 @@
++/*
++ *  Atheros AP94 reference board PCI initialization
++ *
++ *  Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
++ *
++ *  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
++ *  by the Free Software Foundation.
++ */
++
++#include <linux/pci.h>
++#include <linux/init.h>
++#include <linux/delay.h>
++#include <lantiq_soc.h>
++
++#define LTQ_PCI_MEM_BASE		0x18000000
++
++struct ath_fixup {
++	u16		*cal_data;
++	unsigned	slot;
++};
++
++static int ath_num_fixups;
++static struct ath_fixup ath_fixups[2];
++
++static void ath_pci_fixup(struct pci_dev *dev)
++{
++	void __iomem *mem;
++	u16 *cal_data = NULL;
++	u16 cmd;
++	u32 bar0;
++	u32 val;
++	unsigned i;
++
++	for (i = 0; i < ath_num_fixups; i++) {
++		if (ath_fixups[i].cal_data == NULL)
++			continue;
++
++		if (ath_fixups[i].slot != PCI_SLOT(dev->devfn))
++			continue;
++
++		cal_data = ath_fixups[i].cal_data;
++		break;
++	}
++
++	if (cal_data == NULL)
++		return;
++
++	if (*cal_data != 0xa55a) {
++		pr_err("pci %s: invalid calibration data\n", pci_name(dev));
++		return;
++	}
++
++	pr_info("pci %s: fixup device configuration\n", pci_name(dev));
++
++	mem = ioremap(LTQ_PCI_MEM_BASE, 0x10000);
++	if (!mem) {
++		pr_err("pci %s: ioremap error\n", pci_name(dev));
++		return;
++	}
++
++	pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &bar0);
++	pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, LTQ_PCI_MEM_BASE);
++	pci_read_config_word(dev, PCI_COMMAND, &cmd);
++	cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
++	pci_write_config_word(dev, PCI_COMMAND, cmd);
++
++	/* set pointer to first reg address */
++	cal_data += 3;
++	while (*cal_data != 0xffff) {
++		u32 reg;
++		reg = *cal_data++;
++		val = *cal_data++;
++		val |= (*cal_data++) << 16;
++
++		ltq_w32(swab32(val), mem + reg);
++		udelay(100);
++	}
++
++	pci_read_config_dword(dev, PCI_VENDOR_ID, &val);
++	dev->vendor = val & 0xffff;
++	dev->device = (val >> 16) & 0xffff;
++
++	pci_read_config_dword(dev, PCI_CLASS_REVISION, &val);
++	dev->revision = val & 0xff;
++	dev->class = val >> 8; /* upper 3 bytes */
++
++	pr_info("pci %s: fixup info: [%04x:%04x] revision %02x class %#08x\n", 
++		pci_name(dev), dev->vendor, dev->device, dev->revision, dev->class);
++
++	pci_read_config_word(dev, PCI_COMMAND, &cmd);
++	cmd &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
++	pci_write_config_word(dev, PCI_COMMAND, cmd);
++
++	pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, bar0);
++
++	iounmap(mem);
++}
++DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATHEROS, PCI_ANY_ID, ath_pci_fixup);
++
++void __init ltq_pci_ath_fixup(unsigned slot, u16 *cal_data)
++{
++	if (ath_num_fixups >= ARRAY_SIZE(ath_fixups))
++		return;
++
++	ath_fixups[ath_num_fixups].slot = slot;
++	ath_fixups[ath_num_fixups].cal_data = cal_data;
++	ath_num_fixups++;
++}
diff --git a/target/linux/lantiq/patches-3.7/0303-vmmc.patch b/target/linux/lantiq/patches-3.7/0303-vmmc.patch
index 4b5c280e8..c9af85bc8 100644
--- a/target/linux/lantiq/patches-3.7/0303-vmmc.patch
+++ b/target/linux/lantiq/patches-3.7/0303-vmmc.patch
@@ -1,19 +1,19 @@
-Index: linux-3.7.1/arch/mips/lantiq/xway/Makefile
+Index: linux-3.7.4/arch/mips/lantiq/xway/Makefile
 ===================================================================
---- linux-3.7.1.orig/arch/mips/lantiq/xway/Makefile	2013-01-09 09:30:35.000000000 +0100
-+++ linux-3.7.1/arch/mips/lantiq/xway/Makefile	2013-01-09 09:33:03.932167465 +0100
+--- linux-3.7.4.orig/arch/mips/lantiq/xway/Makefile	2013-01-28 18:10:31.000000000 +0100
++++ linux-3.7.4/arch/mips/lantiq/xway/Makefile	2013-01-28 18:14:12.224147075 +0100
 @@ -1,6 +1,6 @@
  obj-y := prom.o sysctrl.o clk.o reset.o dma.o timer.o dcdc.o
  
 -obj-y += eth_mac.o
 +obj-y += eth_mac.o vmmc.o
- obj-$(CONFIG_PCI) += ath_eep.o rt_eep.o
+ obj-$(CONFIG_PCI) += ath_eep.o rt_eep.o pci-ath-fixup.o
  
  obj-$(CONFIG_XRX200_PHY_FW) += xrx200_phy_fw.o
-Index: linux-3.7.1/arch/mips/lantiq/xway/vmmc.c
+Index: linux-3.7.4/arch/mips/lantiq/xway/vmmc.c
 ===================================================================
 --- /dev/null	1970-01-01 00:00:00.000000000 +0000
-+++ linux-3.7.1/arch/mips/lantiq/xway/vmmc.c	2013-01-09 09:31:49.264164272 +0100
++++ linux-3.7.4/arch/mips/lantiq/xway/vmmc.c	2013-01-28 18:13:53.128146621 +0100
 @@ -0,0 +1,63 @@
 +/*
 + *  This program is free software; you can redistribute it and/or modify it