From 716ca530e1c4515d8683c9d5be3d56b301758b66 Mon Sep 17 00:00:00 2001
From: James <>
Date: Wed, 4 Nov 2015 11:49:21 +0000
Subject: trunk-47381

---
 .../ar71xx/files/arch/mips/ath79/pci-ath9k-fixup.c | 126 +++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 target/linux/ar71xx/files/arch/mips/ath79/pci-ath9k-fixup.c

(limited to 'target/linux/ar71xx/files/arch/mips/ath79/pci-ath9k-fixup.c')

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/pci-ath9k-fixup.c b/target/linux/ar71xx/files/arch/mips/ath79/pci-ath9k-fixup.c
new file mode 100644
index 0000000..2202351
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/pci-ath9k-fixup.c
@@ -0,0 +1,126 @@
+/*
+ *  Atheros AP94 reference board PCI initialization
+ *
+ *  Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ */
+
+#include <linux/pci.h>
+#include <linux/delay.h>
+
+#include <asm/mach-ath79/ar71xx_regs.h>
+#include <asm/mach-ath79/ath79.h>
+
+struct ath9k_fixup {
+	u16		*cal_data;
+	unsigned	slot;
+};
+
+static int ath9k_num_fixups;
+static struct ath9k_fixup ath9k_fixups[2];
+
+static void ath9k_pci_fixup(struct pci_dev *dev)
+{
+	void __iomem *mem;
+	u16 *cal_data = NULL;
+	u16 cmd;
+	u32 bar0;
+	u32 val;
+	unsigned i;
+
+	for (i = 0; i < ath9k_num_fixups; i++) {
+		if (ath9k_fixups[i].cal_data == NULL)
+			continue;
+
+		if (ath9k_fixups[i].slot != PCI_SLOT(dev->devfn))
+			continue;
+
+		cal_data = ath9k_fixups[i].cal_data;
+		break;
+	}
+
+	if (cal_data == NULL)
+		return;
+
+	if (*cal_data != 0xa55a) {
+		pr_err("pci %s: invalid calibration data\n", pci_name(dev));
+		return;
+	}
+
+	pr_info("pci %s: fixup device configuration\n", pci_name(dev));
+
+	mem = ioremap(AR71XX_PCI_MEM_BASE, 0x10000);
+	if (!mem) {
+		pr_err("pci %s: ioremap error\n", pci_name(dev));
+		return;
+	}
+
+	pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &bar0);
+
+	switch (ath79_soc) {
+	case ATH79_SOC_AR7161:
+		pci_write_config_dword(dev, PCI_BASE_ADDRESS_0,
+				       AR71XX_PCI_MEM_BASE);
+		break;
+	case ATH79_SOC_AR7240:
+		pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, 0xffff);
+		break;
+
+	case ATH79_SOC_AR7241:
+	case ATH79_SOC_AR7242:
+		pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, 0x1000ffff);
+		break;
+	case ATH79_SOC_AR9344:
+		pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, 0x1000ffff);
+		break;
+
+	default:
+		BUG();
+	}
+
+	pci_read_config_word(dev, PCI_COMMAND, &cmd);
+	cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+	pci_write_config_word(dev, PCI_COMMAND, cmd);
+
+	/* set pointer to first reg address */
+	cal_data += 3;
+	while (*cal_data != 0xffff) {
+		u32 reg;
+		reg = *cal_data++;
+		val = *cal_data++;
+		val |= (*cal_data++) << 16;
+
+		__raw_writel(val, mem + reg);
+		udelay(100);
+	}
+
+	pci_read_config_dword(dev, PCI_VENDOR_ID, &val);
+	dev->vendor = val & 0xffff;
+	dev->device = (val >> 16) & 0xffff;
+
+	pci_read_config_dword(dev, PCI_CLASS_REVISION, &val);
+	dev->revision = val & 0xff;
+	dev->class = val >> 8; /* upper 3 bytes */
+
+	pci_read_config_word(dev, PCI_COMMAND, &cmd);
+	cmd &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
+	pci_write_config_word(dev, PCI_COMMAND, cmd);
+
+	pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, bar0);
+
+	iounmap(mem);
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATHEROS, PCI_ANY_ID, ath9k_pci_fixup);
+
+void __init pci_enable_ath9k_fixup(unsigned slot, u16 *cal_data)
+{
+	if (ath9k_num_fixups >= ARRAY_SIZE(ath9k_fixups))
+		return;
+
+	ath9k_fixups[ath9k_num_fixups].slot = slot;
+	ath9k_fixups[ath9k_num_fixups].cal_data = cal_data;
+	ath9k_num_fixups++;
+}
-- 
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