From 7d7f19ccb777946df0a8fb7c83189ba2ae08b02e Mon Sep 17 00:00:00 2001
From: Ivo van Doorn <ivdoorn@gmail.com>
Date: Sat, 20 Dec 2008 10:52:42 +0100
Subject: rt2x00: Implement Powersaving
Listen to IEEE80211_CONF_PS to determine if the device
should drop into powersaving mode. This feature depends
on the dynamic power save functionality in mac80211.
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/net/wireless/rt2x00/rt61pci.c | 53 ++++++++++++++++++++++++++++++-----
1 file changed, 46 insertions(+), 7 deletions(-)
(limited to 'drivers/net/wireless/rt2x00/rt61pci.c')
diff --git a/drivers/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c
index 987e89009f74..c7ab744f0052 100644
--- a/drivers/net/wireless/rt2x00/rt61pci.c
+++ b/drivers/net/wireless/rt2x00/rt61pci.c
@@ -146,12 +146,6 @@ static void rt61pci_rf_write(struct rt2x00_dev *rt2x00dev,
mutex_unlock(&rt2x00dev->csr_mutex);
}
-#ifdef CONFIG_RT2X00_LIB_LEDS
-/*
- * This function is only called from rt61pci_led_brightness()
- * make gcc happy by placing this function inside the
- * same ifdef statement as the caller.
- */
static void rt61pci_mcu_request(struct rt2x00_dev *rt2x00dev,
const u8 command, const u8 token,
const u8 arg0, const u8 arg1)
@@ -180,7 +174,6 @@ static void rt61pci_mcu_request(struct rt2x00_dev *rt2x00dev,
mutex_unlock(&rt2x00dev->csr_mutex);
}
-#endif /* CONFIG_RT2X00_LIB_LEDS */
static void rt61pci_eepromregister_read(struct eeprom_93cx6 *eeprom)
{
@@ -967,6 +960,50 @@ static void rt61pci_config_duration(struct rt2x00_dev *rt2x00dev,
rt2x00pci_register_write(rt2x00dev, TXRX_CSR9, reg);
}
+static void rt61pci_config_ps(struct rt2x00_dev *rt2x00dev,
+ struct rt2x00lib_conf *libconf)
+{
+ enum dev_state state =
+ (libconf->conf->flags & IEEE80211_CONF_PS) ?
+ STATE_SLEEP : STATE_AWAKE;
+ u32 reg;
+
+ if (state == STATE_SLEEP) {
+ rt2x00pci_register_read(rt2x00dev, MAC_CSR11, ®);
+ rt2x00_set_field32(®, MAC_CSR11_DELAY_AFTER_TBCN,
+ libconf->conf->beacon_int - 10);
+ rt2x00_set_field32(®, MAC_CSR11_TBCN_BEFORE_WAKEUP,
+ libconf->conf->listen_interval - 1);
+ rt2x00_set_field32(®, MAC_CSR11_WAKEUP_LATENCY, 5);
+
+ /* We must first disable autowake before it can be enabled */
+ rt2x00_set_field32(®, MAC_CSR11_AUTOWAKE, 0);
+ rt2x00pci_register_write(rt2x00dev, MAC_CSR11, reg);
+
+ rt2x00_set_field32(®, MAC_CSR11_AUTOWAKE, 1);
+ rt2x00pci_register_write(rt2x00dev, MAC_CSR11, reg);
+
+ rt2x00pci_register_write(rt2x00dev, SOFT_RESET_CSR, 0x00000005);
+ rt2x00pci_register_write(rt2x00dev, IO_CNTL_CSR, 0x0000001c);
+ rt2x00pci_register_write(rt2x00dev, PCI_USEC_CSR, 0x00000060);
+
+ rt61pci_mcu_request(rt2x00dev, MCU_SLEEP, 0xff, 0, 0);
+ } else {
+ rt2x00pci_register_read(rt2x00dev, MAC_CSR11, ®);
+ rt2x00_set_field32(®, MAC_CSR11_DELAY_AFTER_TBCN, 0);
+ rt2x00_set_field32(®, MAC_CSR11_TBCN_BEFORE_WAKEUP, 0);
+ rt2x00_set_field32(®, MAC_CSR11_AUTOWAKE, 0);
+ rt2x00_set_field32(®, MAC_CSR11_WAKEUP_LATENCY, 0);
+ rt2x00pci_register_write(rt2x00dev, MAC_CSR11, reg);
+
+ rt2x00pci_register_write(rt2x00dev, SOFT_RESET_CSR, 0x00000007);
+ rt2x00pci_register_write(rt2x00dev, IO_CNTL_CSR, 0x00000018);
+ rt2x00pci_register_write(rt2x00dev, PCI_USEC_CSR, 0x00000020);
+
+ rt61pci_mcu_request(rt2x00dev, MCU_WAKEUP, 0xff, 0, 0);
+ }
+}
+
static void rt61pci_config(struct rt2x00_dev *rt2x00dev,
struct rt2x00lib_conf *libconf,
const unsigned int flags)
@@ -984,6 +1021,8 @@ static void rt61pci_config(struct rt2x00_dev *rt2x00dev,
rt61pci_config_retry_limit(rt2x00dev, libconf);
if (flags & IEEE80211_CONF_CHANGE_BEACON_INTERVAL)
rt61pci_config_duration(rt2x00dev, libconf);
+ if (flags & IEEE80211_CONF_CHANGE_PS)
+ rt61pci_config_ps(rt2x00dev, libconf);
}
/*
--
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