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ar71xx: enable ddr wb flush on qca955x

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Enable flushing of write buffers on qca955x. GPL code has 0x88 reg
defined for PCI flush which is likely an error since the device
freezes on boot. So use DS default value 0xA8 for PCI flush.

Signed-off-by: Tomislav Požega <pozega.tomislav@gmail.com>
(cherry picked from commit fe9e702dc94ece2a004f6db68d6fb9a94d9437cb)
This commit is contained in:
Tomislav Požega 2019-09-03 17:10:31 +02:00 committed by Koen Vandeputte
parent af91a370de
commit a3c3a8c5ab
1 changed files with 49 additions and 0 deletions
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49
target/linux/ar71xx/patches-4.14/952-qca955x-enable-ddr-wb-flush.patch Normal file
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@ -0,0 +1,49 @@
--- a/arch/mips/ath79/common.c
+++ b/arch/mips/ath79/common.c
@@ -49,6 +49,8 @@ void ath79_ddr_ctrl_init(void)
if (soc_is_ar913x() || soc_is_ar724x() || soc_is_ar933x()) {
ath79_ddr_wb_flush_base = ath79_ddr_base + 0x7c;
ath79_ddr_pci_win_base = 0;
+ } else if (soc_is_qca953x() || soc_is_qca955x()) {
+ ath79_ddr_wb_flush_base = ath79_ddr_base + 0x9c;
} else {
ath79_ddr_wb_flush_base = ath79_ddr_base + 0x9c;
ath79_ddr_pci_win_base = ath79_ddr_base + 0x7c;
--- a/arch/mips/ath79/irq.c
+++ b/arch/mips/ath79/irq.c
@@ -99,12 +99,12 @@ static void qca955x_ip2_irq_dispatch(str
}
if (status & QCA955X_EXT_INT_PCIE_RC1_ALL) {
- /* TODO: flush DDR? */
+ ath79_ddr_wb_flush(3);
generic_handle_irq(ATH79_IP2_IRQ(0));
}
if (status & QCA955X_EXT_INT_WMAC_ALL) {
- /* TODO: flush DDR? */
+ ath79_ddr_wb_flush(4);
generic_handle_irq(ATH79_IP2_IRQ(1));
}
}
@@ -124,17 +124,17 @@ static void qca955x_ip3_irq_dispatch(str
}
if (status & QCA955X_EXT_INT_USB1) {
- /* TODO: flush DDR? */
+ ath79_ddr_wb_flush(2);
generic_handle_irq(ATH79_IP3_IRQ(0));
}
if (status & QCA955X_EXT_INT_USB2) {
- /* TODO: flush DDR? */
+ ath79_ddr_wb_flush(2);
generic_handle_irq(ATH79_IP3_IRQ(1));
}
if (status & QCA955X_EXT_INT_PCIE_RC2_ALL) {
- /* TODO: flush DDR? */
+ ath79_ddr_wb_flush(3);
generic_handle_irq(ATH79_IP3_IRQ(2));
}
}