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Message-ID: <20080423232959.GG17159@xi.wantstofly.org>
Date: Thu, 24 Apr 2008 01:29:59 +0200
From: Lennert Buytenhek <buytenh@...tstofly.org>
To: Dale Farnsworth <dale@...nsworth.org>, netdev@...r.kernel.org
Cc: Nicolas Pitre <nico@....org>
Subject: [PATCH 5/5] mv643xx_eth: inter-mv643xx SMI port sharing
There exist chips with up to four mv643xx_eth silicon blocks but
only one external SMI (MII management) interface -- the SMI logic
of the first block is shared by all the blocks.
Handle this by allowing a per-port override of which
mv643xx_eth_shared's SMI registers (and spinlock) to use.
Signed-off-by: Lennert Buytenhek <buytenh@...vell.com>
Acked-by: Nicolas Pitre <nico@...vell.com>
Index: linux-2.6.25-git4/drivers/net/mv643xx_eth.c
===================================================================
--- linux-2.6.25-git4.orig/drivers/net/mv643xx_eth.c
+++ linux-2.6.25-git4/drivers/net/mv643xx_eth.c
@@ -527,6 +527,8 @@ struct mv643xx_private {
struct mv643xx_shared_private *shared;
int port_num; /* User Ethernet port number */
+ struct mv643xx_shared_private *shared_smi;
+
u32 rx_sram_addr; /* Base address of rx sram area */
u32 rx_sram_size; /* Size of rx sram area */
u32 tx_sram_addr; /* Base address of tx sram area */
@@ -1898,6 +1900,10 @@ static int mv643xx_eth_probe(struct plat
if (mp->shared->win_protect)
wrl(mp, WINDOW_PROTECT(port_num), mp->shared->win_protect);
+ mp->shared_smi = mp->shared;
+ if (pd->shared_smi != NULL)
+ mp->shared_smi = platform_get_drvdata(pd->shared_smi);
+
/* set default config values */
eth_port_uc_addr_get(mp, dev->dev_addr);
mp->rx_ring_size = PORT_DEFAULT_RECEIVE_QUEUE_SIZE;
@@ -2983,15 +2989,16 @@ static void eth_port_reset(struct mv643x
static void eth_port_read_smi_reg(struct mv643xx_private *mp,
unsigned int phy_reg, unsigned int *value)
{
+ void __iomem *smi_reg = mp->shared_smi->eth_base + SMI_REG;
int phy_addr = ethernet_phy_get(mp);
unsigned long flags;
int i;
/* the SMI register is a shared resource */
- spin_lock_irqsave(&mp->shared->phy_lock, flags);
+ spin_lock_irqsave(&mp->shared_smi->phy_lock, flags);
/* wait for the SMI register to become available */
- for (i = 0; rdl(mp, SMI_REG) & ETH_SMI_BUSY; i++) {
+ for (i = 0; readl(smi_reg) & ETH_SMI_BUSY; i++) {
if (i == PHY_WAIT_ITERATIONS) {
printk("%s: PHY busy timeout\n", mp->dev->name);
goto out;
@@ -2999,11 +3006,11 @@ static void eth_port_read_smi_reg(struct
udelay(PHY_WAIT_MICRO_SECONDS);
}
- wrl(mp, SMI_REG,
- (phy_addr << 16) | (phy_reg << 21) | ETH_SMI_OPCODE_READ);
+ writel((phy_addr << 16) | (phy_reg << 21) | ETH_SMI_OPCODE_READ,
+ smi_reg);
/* now wait for the data to be valid */
- for (i = 0; !(rdl(mp, SMI_REG) & ETH_SMI_READ_VALID); i++) {
+ for (i = 0; !(readl(smi_reg) & ETH_SMI_READ_VALID); i++) {
if (i == PHY_WAIT_ITERATIONS) {
printk("%s: PHY read timeout\n", mp->dev->name);
goto out;
@@ -3011,9 +3018,9 @@ static void eth_port_read_smi_reg(struct
udelay(PHY_WAIT_MICRO_SECONDS);
}
- *value = rdl(mp, SMI_REG) & 0xffff;
+ *value = readl(smi_reg) & 0xffff;
out:
- spin_unlock_irqrestore(&mp->shared->phy_lock, flags);
+ spin_unlock_irqrestore(&mp->shared_smi->phy_lock, flags);
}
/*
@@ -3039,17 +3046,16 @@ out:
static void eth_port_write_smi_reg(struct mv643xx_private *mp,
unsigned int phy_reg, unsigned int value)
{
- int phy_addr;
- int i;
+ void __iomem *smi_reg = mp->shared_smi->eth_base + SMI_REG;
+ int phy_addr = ethernet_phy_get(mp);
unsigned long flags;
-
- phy_addr = ethernet_phy_get(mp);
+ int i;
/* the SMI register is a shared resource */
- spin_lock_irqsave(&mp->shared->phy_lock, flags);
+ spin_lock_irqsave(&mp->shared_smi->phy_lock, flags);
/* wait for the SMI register to become available */
- for (i = 0; rdl(mp, SMI_REG) & ETH_SMI_BUSY; i++) {
+ for (i = 0; readl(smi_reg) & ETH_SMI_BUSY; i++) {
if (i == PHY_WAIT_ITERATIONS) {
printk("%s: PHY busy timeout\n", mp->dev->name);
goto out;
@@ -3057,10 +3063,10 @@ static void eth_port_write_smi_reg(struc
udelay(PHY_WAIT_MICRO_SECONDS);
}
- wrl(mp, SMI_REG, (phy_addr << 16) | (phy_reg << 21) |
- ETH_SMI_OPCODE_WRITE | (value & 0xffff));
+ writel((phy_addr << 16) | (phy_reg << 21) |
+ ETH_SMI_OPCODE_WRITE | (value & 0xffff), smi_reg);
out:
- spin_unlock_irqrestore(&mp->shared->phy_lock, flags);
+ spin_unlock_irqrestore(&mp->shared_smi->phy_lock, flags);
}
/*
Index: linux-2.6.25-git4/include/linux/mv643xx_eth.h
===================================================================
--- linux-2.6.25-git4.orig/include/linux/mv643xx_eth.h
+++ linux-2.6.25-git4/include/linux/mv643xx_eth.h
@@ -24,6 +24,8 @@ struct mv643xx_eth_platform_data {
struct platform_device *shared;
int port_number;
+ struct platform_device *shared_smi;
+
u16 force_phy_addr; /* force override if phy_addr == 0 */
u16 phy_addr;
--
--
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