reinstate the fixed PHY fallback for devices with undetectable switches

At least devices without a switch present on the MDIO bus still get a valid
link and work as expected (such as the Linksys WAG54Gv2).

SVN-Revision: 33751

target/linux/ar7/patches-3.3/972-cpmac_fixup.patch

@@ -1,59 +1,38 @@
-Index: linux-3.3.8/arch/mips/ar7/platform.c
-===================================================================
---- linux-3.3.8.orig/arch/mips/ar7/platform.c	2012-10-06 21:15:51.930451885 -0700
-+++ linux-3.3.8/arch/mips/ar7/platform.c	2012-10-06 21:15:51.962452050 -0700
-@@ -33,7 +33,6 @@
- #include <linux/string.h>
- #include <linux/etherdevice.h>
- #include <linux/phy.h>
--#include <linux/phy_fixed.h>
- #include <linux/gpio.h>
- #include <linux/clk.h>
- 
-@@ -248,12 +247,6 @@
- 	},
- };
- 
--static struct fixed_phy_status fixed_phy_status __initdata = {
--	.link		= 1,
--	.speed		= 100,
--	.duplex		= 1,
--};
--
- static struct plat_cpmac_data cpmac_low_data = {
- 	.reset_bit	= 17,
- 	.power_bit	= 20,
-@@ -709,26 +702,19 @@
+--- a/arch/mips/ar7/platform.c
++++ b/arch/mips/ar7/platform.c
+@@ -709,26 +709,23 @@ static int __init ar7_register_devices(v
  	}
  
  	if (ar7_has_high_cpmac()) {
--		res = fixed_phy_add(PHY_POLL, cpmac_high.id, &fixed_phy_status);
++		cpmac_get_mac(0, cpmac_high_data.dev_addr);
++
+ 		res = fixed_phy_add(PHY_POLL, cpmac_high.id, &fixed_phy_status);
 -		if (!res) {
 -			cpmac_get_mac(1, cpmac_high_data.dev_addr);
--
++		if (!res)
++			pr_warning("unable to register fixed phy for cpmac-high: %d\n", res);
+ 
 -			res = platform_device_register(&cpmac_high);
 -			if (res)
 -				pr_warning("unable to register cpmac-high: %d\n", res);
 -		} else
 -			pr_warning("unable to add cpmac-high phy: %d\n", res);
 -	} else
--		cpmac_low_data.phy_mask = 0xffffffff;
-+		cpmac_get_mac(0, cpmac_high_data.dev_addr);
- 
++		res = platform_device_register(&cpmac_high);
++		if (res)
++			pr_warning("unable to register cpmac-high: %d\n", res);
++		cpmac_get_mac(1, cpmac_low_data.dev_addr);
++	} else {
+ 		cpmac_low_data.phy_mask = 0xffffffff;
+-
 -	res = fixed_phy_add(PHY_POLL, cpmac_low.id, &fixed_phy_status);
 -	if (!res) {
--		cpmac_get_mac(0, cpmac_low_data.dev_addr);
+ 		cpmac_get_mac(0, cpmac_low_data.dev_addr);
 -		res = platform_device_register(&cpmac_low);
-+		res = platform_device_register(&cpmac_high);
- 		if (res)
+-		if (res)
 -			pr_warning("unable to register cpmac-low: %d\n", res);
 -	} else
 -		pr_warning("unable to add cpmac-low phy: %d\n", res);
-+			pr_warning("unable to register cpmac-high: %d\n", res);
-+		cpmac_get_mac(1, cpmac_low_data.dev_addr);
-+	} else {
-+		cpmac_low_data.phy_mask = 0xffffffff;
-+		cpmac_get_mac(0, cpmac_low_data.dev_addr);
 +	}
 +	res = platform_device_register(&cpmac_low);
 +	if (res)
@@ -61,7 +40,7 @@ Index: linux-3.3.8/arch/mips/ar7/platform.c
  
  	detect_leds();
  	res = platform_device_register(&ar7_gpio_leds);
-@@ -741,8 +727,10 @@
+@@ -741,8 +738,10 @@ static int __init ar7_register_devices(v
  
  	/* Register watchdog only if enabled in hardware */
  	bootcr = ioremap_nocache(AR7_REGS_DCL, 4);
@@ -74,10 +53,8 @@ Index: linux-3.3.8/arch/mips/ar7/platform.c
  	if (val & AR7_WDT_HW_ENA) {
  		if (ar7_has_high_vlynq())
  			ar7_wdt_res.start = UR8_REGS_WDT;
-Index: linux-3.3.8/arch/mips/include/asm/mach-ar7/ar7.h
-===================================================================
---- linux-3.3.8.orig/arch/mips/include/asm/mach-ar7/ar7.h	2012-06-01 00:16:13.000000000 -0700
-+++ linux-3.3.8/arch/mips/include/asm/mach-ar7/ar7.h	2012-10-06 21:15:51.966452059 -0700
+--- a/arch/mips/include/asm/mach-ar7/ar7.h
++++ b/arch/mips/include/asm/mach-ar7/ar7.h
 @@ -42,6 +42,7 @@
  #define AR7_REGS_PINSEL (AR7_REGS_BASE + 0x160C)
  #define AR7_REGS_VLYNQ0	(AR7_REGS_BASE + 0x1800)
@@ -86,10 +63,8 @@ Index: linux-3.3.8/arch/mips/include/asm/mach-ar7/ar7.h
  #define AR7_REGS_VLYNQ1	(AR7_REGS_BASE + 0x1c00)
  #define AR7_REGS_MDIO	(AR7_REGS_BASE + 0x1e00)
  #define AR7_REGS_IRQ	(AR7_REGS_BASE + 0x2400)
-Index: linux-3.3.8/drivers/net/ethernet/ti/cpmac.c
-===================================================================
---- linux-3.3.8.orig/drivers/net/ethernet/ti/cpmac.c	2012-10-06 21:15:51.946451965 -0700
-+++ linux-3.3.8/drivers/net/ethernet/ti/cpmac.c	2012-10-11 11:23:17.459719956 -0700
+--- a/drivers/net/ethernet/ti/cpmac.c
++++ b/drivers/net/ethernet/ti/cpmac.c
 @@ -35,7 +35,6 @@
  #include <linux/skbuff.h>
  #include <linux/mii.h>
@@ -98,7 +73,7 @@ Index: linux-3.3.8/drivers/net/ethernet/ti/cpmac.c
  #include <linux/platform_device.h>
  #include <linux/dma-mapping.h>
  #include <linux/clk.h>
-@@ -48,14 +47,11 @@
+@@ -48,14 +47,11 @@ MODULE_LICENSE("GPL");
  MODULE_ALIAS("platform:cpmac");
  
  static int debug_level = 8;
@@ -114,7 +89,7 @@ Index: linux-3.3.8/drivers/net/ethernet/ti/cpmac.c
  
  #define CPMAC_VERSION "0.5.2"
  /* frame size + 802.1q tag + FCS size */
-@@ -674,9 +670,8 @@
+@@ -674,9 +670,8 @@ static void cpmac_hw_start(struct net_de
  	for (i = 0; i < 8; i++)
  		cpmac_write(priv->regs, CPMAC_MAC_ADDR_LO(i), dev->dev_addr[5]);
  	cpmac_write(priv->regs, CPMAC_MAC_ADDR_MID, dev->dev_addr[4]);
@@ -126,7 +101,7 @@ Index: linux-3.3.8/drivers/net/ethernet/ti/cpmac.c
  	cpmac_write(priv->regs, CPMAC_MAX_LENGTH, CPMAC_SKB_SIZE);
  	cpmac_write(priv->regs, CPMAC_UNICAST_CLEAR, 0xff);
  	cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 0xff);
-@@ -1121,25 +1116,18 @@
+@@ -1121,25 +1116,19 @@ static int __devinit cpmac_probe(struct
  
  	pdata = pdev->dev.platform_data;
  
@@ -151,17 +126,18 @@ Index: linux-3.3.8/drivers/net/ethernet/ti/cpmac.c
 +		break;
  	}
  
- 	if (phy_id == PHY_MAX_ADDR) {
+-	if (phy_id == PHY_MAX_ADDR) {
 -		dev_err(&pdev->dev, "no PHY present, falling back "
 -					"to switch on MDIO bus 0\n");
 -		strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE); /* fixed phys bus */
--		phy_id = pdev->id;
-+		printk(KERN_ERR "cpmac: No PHY present\n");
-+		return -ENXIO;
++	if (phy_id == PHY_MAX_ADDR && pdev->id == 1) {
++		printk(KERN_ERR "cpmac: No PHY present, using fixed PHY\n");
+ 		phy_id = pdev->id;
++		strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE);
  	}
  
  	dev = alloc_etherdev_mq(sizeof(*priv), CPMAC_QUEUES);
-@@ -1178,6 +1166,13 @@
+@@ -1178,6 +1167,13 @@ static int __devinit cpmac_probe(struct
  	snprintf(priv->phy_name, MII_BUS_ID_SIZE, PHY_ID_FMT,
  						mdio_bus_id, phy_id);
  
@@ -175,7 +151,7 @@ Index: linux-3.3.8/drivers/net/ethernet/ti/cpmac.c
  	priv->phy = phy_connect(dev, priv->phy_name, cpmac_adjust_link, 0,
  						PHY_INTERFACE_MODE_MII);
  
-@@ -1189,13 +1184,6 @@
+@@ -1189,13 +1185,6 @@ static int __devinit cpmac_probe(struct
  		goto fail;
  	}
  
@@ -189,7 +165,7 @@ Index: linux-3.3.8/drivers/net/ethernet/ti/cpmac.c
  	if (netif_msg_probe(priv)) {
  		printk(KERN_INFO
  		       "cpmac: device %s (regs: %p, irq: %d, phy: %s, "
-@@ -1228,6 +1216,7 @@
+@@ -1228,6 +1217,7 @@ int __devinit cpmac_init(void)
  {
  	u32 mask;
  	int i, res;
@@ -197,7 +173,7 @@ Index: linux-3.3.8/drivers/net/ethernet/ti/cpmac.c
  
  	cpmac_mii = mdiobus_alloc();
  	if (cpmac_mii == NULL)
-@@ -1251,31 +1240,51 @@
+@@ -1251,31 +1241,51 @@ int __devinit cpmac_init(void)
  	ar7_gpio_disable(26);
  	ar7_gpio_disable(27);