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ramips: Power down phy on disabled switch ports

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Power down phy on disabled switch ports.

Haven't measured this myself yet, but according to this
http://www.8devices.com/community/viewtopic.php?f=6&t=156
it can save about 300mW of power.

[juhosg: fix checkpatch warning]

Signed-off-by: Tobias Diedrich <ranma+openwrt@tdiedrich.de>

SVN-Revision: 33304
This commit is contained in:
Gabor Juhos 2012-08-29 10:37:45 +00:00
parent 1617f226a9
commit bc4763a399
1 changed files with 67 additions and 5 deletions
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72
target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_esw.c
View file

@ -1,5 +1,6 @@
#include <linux/ioport.h>
#include <linux/switch.h>
#include <linux/mii.h>
#include <rt305x_regs.h>
#include <rt305x_esw_platform.h>
@ -326,6 +327,57 @@ rt305x_esw_set_vmsc(struct rt305x_esw *esw, unsigned vlan, unsigned msc)
(msc & RT305X_ESW_VMSC_MSC_M) << s);
}
static unsigned
rt305x_esw_get_port_disable(struct rt305x_esw *esw)
{
unsigned reg;
reg = rt305x_esw_rr(esw, RT305X_ESW_REG_POC0);
return (reg >> RT305X_ESW_POC0_DIS_PORT_S) &
RT305X_ESW_POC0_DIS_PORT_M;
}
static void
rt305x_esw_set_port_disable(struct rt305x_esw *esw, unsigned disable_mask)
{
unsigned old_mask;
unsigned enable_mask;
unsigned changed;
int i;
old_mask = rt305x_esw_get_port_disable(esw);
changed = old_mask ^ disable_mask;
enable_mask = old_mask & disable_mask;
/* enable before writing to MII */
rt305x_esw_rmw(esw, RT305X_ESW_REG_POC0,
(RT305X_ESW_POC0_DIS_PORT_M <<
RT305X_ESW_POC0_DIS_PORT_S),
enable_mask << RT305X_ESW_POC0_DIS_PORT_S);
for (i = 0; i < RT305X_ESW_NUM_LEDS; i++) {
if (!(changed & (1 << i)))
continue;
if (disable_mask & (1 << i)) {
/* disable */
rt305x_mii_write(esw, i, MII_BMCR,
BMCR_PDOWN);
} else {
/* enable */
rt305x_mii_write(esw, i, MII_BMCR,
BMCR_FULLDPLX |
BMCR_ANENABLE |
BMCR_ANRESTART |
BMCR_SPEED100);
}
}
/* disable after writing to MII */
rt305x_esw_rmw(esw, RT305X_ESW_REG_POC0,
(RT305X_ESW_POC0_DIS_PORT_M <<
RT305X_ESW_POC0_DIS_PORT_S),
disable_mask << RT305X_ESW_POC0_DIS_PORT_S);
}
static int
rt305x_esw_apply_config(struct switch_dev *dev);
@ -333,6 +385,7 @@ static void
rt305x_esw_hw_init(struct rt305x_esw *esw)
{
int i;
u8 port_disable = 0;
u8 port_map = RT305X_ESW_PMAP_LLLLLL;
/* vodoo from original driver */
@ -384,10 +437,21 @@ rt305x_esw_hw_init(struct rt305x_esw *esw)
rt305x_esw_wr(esw, 0x00000005, RT305X_ESW_REG_P3LED);
rt305x_esw_wr(esw, 0x00000005, RT305X_ESW_REG_P4LED);
/* Copy disabled port configuration from bootloader setup */
port_disable = rt305x_esw_get_port_disable(esw);
for (i = 0; i < 6; i++)
esw->ports[i].disable = (port_disable & (1 << i)) != 0;
rt305x_mii_write(esw, 0, 31, 0x8000);
for (i = 0; i < 5; i++) {
/* TX10 waveform coefficient */
rt305x_mii_write(esw, i, 0, 0x3100);
if (esw->ports[i].disable) {
rt305x_mii_write(esw, i, MII_BMCR, BMCR_PDOWN);
} else {
rt305x_mii_write(esw, i, MII_BMCR,
BMCR_FULLDPLX |
BMCR_ANENABLE |
BMCR_SPEED100);
}
/* TX10 waveform coefficient */
rt305x_mii_write(esw, i, 26, 0x1601);
/* TX100/TX10 AD/DA current bias */
@ -482,9 +546,7 @@ rt305x_esw_apply_config(struct switch_dev *dev)
RT305X_ESW_REG_P0LED + 4*i);
}
rt305x_esw_rmw(esw, RT305X_ESW_REG_POC0,
RT305X_ESW_POC0_DIS_PORT_M << RT305X_ESW_POC0_DIS_PORT_S,
disable << RT305X_ESW_POC0_DIS_PORT_S);
rt305x_esw_set_port_disable(esw, disable);
rt305x_esw_rmw(esw, RT305X_ESW_REG_SGC2,
(RT305X_ESW_SGC2_DOUBLE_TAG_M <<
RT305X_ESW_SGC2_DOUBLE_TAG_S),