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mv643xx_eth: configurable t_clk

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Make t_clk configurable via platform device data (with the current
hardcoded value, 133 MHz, being the default), as it varies across
different chip families.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Acked-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
This commit is contained in:
Lennert Buytenhek 2008-04-24 01:27:32 +02:00 committed by Dale Farnsworth
parent f2ce825d2a
commit c416a41f99
2 changed files with 10 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/net/mv643xx_eth.c
View File

@ -519,6 +519,8 @@ struct mv643xx_shared_private {
spinlock_t phy_lock;
u32 win_protect;
unsigned int t_clk;
};
struct mv643xx_private {
@ -1129,7 +1131,6 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id)
*
* INPUT:
* struct mv643xx_private *mp Ethernet port
* unsigned int t_clk t_clk of the MV-643xx chip in HZ units
* unsigned int delay Delay in usec
*
* OUTPUT:
@ -1140,10 +1141,10 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id)
*
*/
static unsigned int eth_port_set_rx_coal(struct mv643xx_private *mp,
unsigned int t_clk, unsigned int delay)
unsigned int delay)
{
unsigned int port_num = mp->port_num;
unsigned int coal = ((t_clk / 1000000) * delay) / 64;
unsigned int coal = ((mp->shared->t_clk / 1000000) * delay) / 64;
/* Set RX Coalescing mechanism */
wrl(mp, SDMA_CONFIG_REG(port_num),
@ -1168,7 +1169,6 @@ static unsigned int eth_port_set_rx_coal(struct mv643xx_private *mp,
*
* INPUT:
* struct mv643xx_private *mp Ethernet port
* unsigned int t_clk t_clk of the MV-643xx chip in HZ units
* unsigned int delay Delay in uSeconds
*
* OUTPUT:
@ -1179,9 +1179,9 @@ static unsigned int eth_port_set_rx_coal(struct mv643xx_private *mp,
*
*/
static unsigned int eth_port_set_tx_coal(struct mv643xx_private *mp,
unsigned int t_clk, unsigned int delay)
unsigned int delay)
{
unsigned int coal = ((t_clk / 1000000) * delay) / 64;
unsigned int coal = ((mp->shared->t_clk / 1000000) * delay) / 64;
/* Set TX Coalescing mechanism */
wrl(mp, TX_FIFO_URGENT_THRESHOLD_REG(mp->port_num), coal << 4);
@ -1423,11 +1423,11 @@ static int mv643xx_eth_open(struct net_device *dev)
#ifdef MV643XX_COAL
mp->rx_int_coal =
eth_port_set_rx_coal(mp, 133000000, MV643XX_RX_COAL);
eth_port_set_rx_coal(mp, MV643XX_RX_COAL);
#endif
mp->tx_int_coal =
eth_port_set_tx_coal(mp, 133000000, MV643XX_TX_COAL);
eth_port_set_tx_coal(mp, MV643XX_TX_COAL);
/* Unmask phy and link status changes interrupts */
wrl(mp, INTERRUPT_EXTEND_MASK_REG(port_num), ETH_INT_UNMASK_ALL_EXT);
@ -2063,6 +2063,7 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
goto out_free;
spin_lock_init(&msp->phy_lock);
msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
platform_set_drvdata(pdev, msp);

1
include/linux/mv643xx_eth.h
View File

@ -17,6 +17,7 @@
struct mv643xx_eth_shared_platform_data {
struct mbus_dram_target_info *dram;
unsigned int t_clk;
};
struct mv643xx_eth_platform_data {