From: Felix Fietkau <[email protected]>
On WiSoc we cannot access mac register before it is resetted.
It will crash hardware otherwise.
Signed-off-by: Felix Fietkau <[email protected]>
Signed-off-by: Wojciech Dubowik <[email protected]>
---
drivers/net/wireless/ath/ath5k/base.c | 7 ++-
drivers/net/wireless/ath/ath5k/reset.c | 114 ++++++++++++++++++++++++-------
2 files changed, 94 insertions(+), 27 deletions(-)
diff --git a/drivers/net/wireless/ath/ath5k/base.c b/drivers/net/wireless/ath/ath5k/base.c
index 4d5ac71..87a4bb6 100644
--- a/drivers/net/wireless/ath/ath5k/base.c
+++ b/drivers/net/wireless/ath/ath5k/base.c
@@ -2169,7 +2169,8 @@ ath5k_intr(int irq, void *dev_id)
unsigned int counter = 1000;
if (unlikely(test_bit(ATH_STAT_INVALID, sc->status) ||
- !ath5k_hw_is_intr_pending(ah)))
+ ((ath5k_get_bus_type(ah) != ATH_AHB) &&
+ !ath5k_hw_is_intr_pending(ah))))
return IRQ_NONE;
do {
@@ -2235,6 +2236,10 @@ ath5k_intr(int irq, void *dev_id)
tasklet_schedule(&sc->rf_kill.toggleq);
}
+
+ if (ath5k_get_bus_type(ah) == ATH_AHB)
+ break;
+
} while (ath5k_hw_is_intr_pending(ah) && --counter > 0);
if (unlikely(!counter))
diff --git a/drivers/net/wireless/ath/ath5k/reset.c b/drivers/net/wireless/ath/ath5k/reset.c
index 198a146..4f54655 100644
--- a/drivers/net/wireless/ath/ath5k/reset.c
+++ b/drivers/net/wireless/ath/ath5k/reset.c
@@ -27,6 +27,7 @@
#include <linux/pci.h> /* To determine if a card is pci-e */
#include <linux/log2.h>
+#include <linux/platform_device.h>
#include "ath5k.h"
#include "reg.h"
#include "base.h"
@@ -198,31 +199,74 @@ static inline void ath5k_hw_write_rate_duration(struct ath5k_hw *ah,
*/
static int ath5k_hw_nic_reset(struct ath5k_hw *ah, u32 val)
{
- int ret;
+ int ret = 0;
u32 mask = val ? val : ~0U;
/* Read-and-clear RX Descriptor Pointer*/
- ath5k_hw_reg_read(ah, AR5K_RXDP);
+ if (!(mask & AR5K_RESET_CTL_MAC))
+ ath5k_hw_reg_read(ah, AR5K_RXDP);
/*
* Reset the device and wait until success
*/
- ath5k_hw_reg_write(ah, val, AR5K_RESET_CTL);
+ if (ath5k_get_bus_type(ah) == ATH_AHB) {
+ volatile u32 *reg;
+ u32 regval;
+ val = 0;
+
+ /* ah->ah_mac_srev is not available at this point yet */
+ if (ah->ah_sc->devid >= AR5K_SREV_AR2315_R6) {
+ reg = (u32 *) AR5K_AR2315_RESET;
+ if (mask & AR5K_RESET_CTL_MAC)
+ val |= AR5K_AR2315_RESET_WMAC;
+ if (mask & AR5K_RESET_CTL_BASEBAND)
+ val |= AR5K_AR2315_RESET_BB_WARM;
+ } else {
+ reg = (u32 *) AR5K_AR5312_RESET;
+ if (to_platform_device(ah->ah_sc->dev)->id == 0) {
+ if (mask & AR5K_RESET_CTL_MAC)
+ val |= AR5K_AR5312_RESET_WMAC0;
+ if (mask & AR5K_RESET_CTL_BASEBAND)
+ val |= AR5K_AR5312_RESET_BB0_COLD |
+ AR5K_AR5312_RESET_BB0_WARM;
+ } else {
+ if (mask & AR5K_RESET_CTL_MAC)
+ val |= AR5K_AR5312_RESET_WMAC1;
+ if (mask & AR5K_RESET_CTL_BASEBAND)
+ val |= AR5K_AR5312_RESET_BB1_COLD |
+ AR5K_AR5312_RESET_BB1_WARM;
+ }
+ }
- /* Wait at least 128 PCI clocks */
- udelay(15);
+ /* Put BB/MAC into reset */
+ regval = __raw_readl(reg);
+ __raw_writel(regval | val, reg);
+ regval = __raw_readl(reg);
+ udelay(100);
- if (ah->ah_version == AR5K_AR5210) {
- val &= AR5K_RESET_CTL_PCU | AR5K_RESET_CTL_DMA
- | AR5K_RESET_CTL_MAC | AR5K_RESET_CTL_PHY;
- mask &= AR5K_RESET_CTL_PCU | AR5K_RESET_CTL_DMA
- | AR5K_RESET_CTL_MAC | AR5K_RESET_CTL_PHY;
+ /* Bring BB/MAC out of reset */
+ __raw_writel(regval & ~val, reg);
+ regval = __raw_readl(reg);
} else {
- val &= AR5K_RESET_CTL_PCU | AR5K_RESET_CTL_BASEBAND;
- mask &= AR5K_RESET_CTL_PCU | AR5K_RESET_CTL_BASEBAND;
- }
- ret = ath5k_hw_register_timeout(ah, AR5K_RESET_CTL, mask, val, false);
+ ath5k_hw_reg_write(ah, val, AR5K_RESET_CTL);
+
+ /* Wait at least 128 PCI clocks */
+ udelay(15);
+
+ if (ah->ah_version == AR5K_AR5210) {
+ val &= AR5K_RESET_CTL_PCU | AR5K_RESET_CTL_DMA
+ | AR5K_RESET_CTL_MAC | AR5K_RESET_CTL_PHY;
+ mask &= AR5K_RESET_CTL_PCU | AR5K_RESET_CTL_DMA
+ | AR5K_RESET_CTL_MAC | AR5K_RESET_CTL_PHY;
+ } else {
+ val &= AR5K_RESET_CTL_PCU | AR5K_RESET_CTL_BASEBAND;
+ mask &= AR5K_RESET_CTL_PCU | AR5K_RESET_CTL_BASEBAND;
+ }
+
+ ret = ath5k_hw_register_timeout(ah, AR5K_RESET_CTL,
+ mask, val, false);
+ }
/*
* Reset configuration register (for hw byte-swap). Note that this
@@ -334,6 +378,9 @@ int ath5k_hw_on_hold(struct ath5k_hw *ah)
u32 bus_flags;
int ret;
+ if (ath5k_get_bus_type(ah) == ATH_AHB)
+ return 0;
+
/* Make sure device is awake */
ret = ath5k_hw_set_power(ah, AR5K_PM_AWAKE, true, 0);
if (ret) {
@@ -390,22 +437,30 @@ int ath5k_hw_nic_wakeup(struct ath5k_hw *ah, int flags, bool initial)
mode = 0;
clock = 0;
- /* Wakeup the device */
- ret = ath5k_hw_set_power(ah, AR5K_PM_AWAKE, true, 0);
- if (ret) {
- ATH5K_ERR(ah->ah_sc, "failed to wakeup the MAC Chip\n");
- return ret;
+ if (ath5k_get_bus_type(ah) == ATH_AHB && !initial) {
+ /* Wakeup the device */
+ ret = ath5k_hw_set_power(ah, AR5K_PM_AWAKE, true, 0);
+ if (ret) {
+ ATH5K_ERR(ah->ah_sc, "failed to wakeup the MAC Chip\n");
+ return ret;
+ }
}
/*
* Put chipset on warm reset...
*
- * Note: putting PCI core on warm reset on PCI-E cards
- * results card to hang and always return 0xffff... so
- * we ingore that flag for PCI-E cards. On PCI cards
- * this flag gets cleared after 64 PCI clocks.
*/
- bus_flags = (pdev && pdev->is_pcie) ? 0 : AR5K_RESET_CTL_PCI;
+ if (ath5k_get_bus_type(ah) == ATH_AHB) {
+ /* Reset MAC on WiSoc devices */
+ bus_flags = (initial) ? AR5K_RESET_CTL_MAC : 0;
+ } else {
+ /* Note: putting PCI core on warm reset on PCI-E cards
+ * results card to hang and always return 0xffff... so
+ * we ingore that flag for PCI-E cards. On PCI cards
+ * this flag gets cleared after 64 PCI clocks.
+ */
+ bus_flags = (pdev && pdev->is_pcie) ? 0 : AR5K_RESET_CTL_PCI;
+ }
if (ah->ah_version == AR5K_AR5210) {
ret = ath5k_hw_nic_reset(ah, AR5K_RESET_CTL_PCU |
@@ -536,6 +591,9 @@ static void ath5k_hw_set_sleep_clock(struct ath5k_hw *ah, bool enable)
struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
u32 scal, spending, usec32;
+ if (ath5k_get_bus_type(ah) == ATH_AHB)
+ enable = false;
+
/* Only set 32KHz settings if we have an external
* 32KHz crystal present */
if ((AR5K_EEPROM_HAS32KHZCRYSTAL(ee->ee_misc1) ||
@@ -607,6 +665,7 @@ static void ath5k_hw_set_sleep_clock(struct ath5k_hw *ah, bool enable)
if ((ah->ah_radio == AR5K_RF5112) ||
(ah->ah_radio == AR5K_RF5413) ||
+ (ah->ah_radio == AR5K_RF2316) ||
(ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4)))
spending = 0x14;
else
@@ -614,7 +673,9 @@ static void ath5k_hw_set_sleep_clock(struct ath5k_hw *ah, bool enable)
ath5k_hw_reg_write(ah, spending, AR5K_PHY_SPENDING);
if ((ah->ah_radio == AR5K_RF5112) ||
- (ah->ah_radio == AR5K_RF5413))
+ (ah->ah_radio == AR5K_RF5413) ||
+ (ah->ah_radio == AR5K_RF2316) ||
+ (ah->ah_radio == AR5K_RF2317))
usec32 = 39;
else
usec32 = 31;
@@ -678,7 +739,8 @@ static void ath5k_hw_tweak_initval_settings(struct ath5k_hw *ah,
/* Set fast ADC */
if ((ah->ah_radio == AR5K_RF5413) ||
- (ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4))) {
+ (ah->ah_radio == AR5K_RF2317) ||
+ (ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4))) {
u32 fast_adc = true;
if (channel->center_freq == 2462 ||
--
1.7.1
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