From bbebbf735a02b6d044ed928978ab4bd5f1833364 Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jonas.gorski@gmail.com>
Date: Thu, 3 May 2012 14:36:11 +0200
Subject: [PATCH 61/72] BCM63XX: add a fixup for ath9k devices

---
 arch/mips/bcm63xx/Makefile                         |    3 +-
 arch/mips/bcm63xx/pci-ath9k-fixup.c                |  190 ++++++++++++++++++++
 .../include/asm/mach-bcm63xx/pci_ath9k_fixup.h     |    7 +
 3 files changed, 199 insertions(+), 1 deletion(-)
 create mode 100644 arch/mips/bcm63xx/pci-ath9k-fixup.c
 create mode 100644 arch/mips/include/asm/mach-bcm63xx/pci_ath9k_fixup.h

--- a/arch/mips/bcm63xx/Makefile
+++ b/arch/mips/bcm63xx/Makefile
@@ -1,8 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-y		+= clk.o cpu.o cs.o gpio.o irq.o nvram.o prom.o reset.o \
 		   setup.o timer.o dev-enet.o dev-flash.o dev-pcmcia.o \
-		   dev-rng.o dev-wdt.o dev-usb-ehci.o \
-		   dev-usb-ohci.o dev-usb-usbd.o usb-common.o sprom.o
+		   dev-rng.o dev-wdt.o dev-usb-ehci.o dev-usb-ohci.o \
+		   dev-usb-usbd.o pci-ath9k-fixup.o usb-common.o sprom.o
 obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 
 obj-y		+= boards/
--- /dev/null
+++ b/arch/mips/bcm63xx/pci-ath9k-fixup.c
@@ -0,0 +1,200 @@
+/*
+ *  Broadcom BCM63XX Ath9k EEPROM fixup helper.
+ *
+ *  Copytight (C) 2012 Jonas Gorski <jonas.gorski@gmail.com>
+ *
+ *  Based on
+ *
+ *  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/if_ether.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/ath9k_platform.h>
+
+#include <bcm63xx_cpu.h>
+#include <bcm63xx_regs.h>
+#include <bcm63xx_io.h>
+#include <bcm63xx_nvram.h>
+#include <bcm63xx_dev_pci.h>
+#include <bcm63xx_dev_flash.h>
+#include <pci_ath9k_fixup.h>
+
+#define bcm_hsspi_writel(v, o)	bcm_rset_writel(RSET_HSSPI, (v), (o))
+
+struct ath9k_fixup {
+	unsigned slot;
+	u8 mac[ETH_ALEN];
+	struct ath9k_platform_data pdata;
+};
+
+static int ath9k_num_fixups;
+static struct ath9k_fixup ath9k_fixups[2] = {
+	{
+		.slot = 255,
+		.pdata = {
+			.led_pin	= -1,
+		},
+	},
+	{
+		.slot = 255,
+		.pdata = {
+			.led_pin	= -1,
+		},
+	},
+};
+
+static u16 *bcm63xx_read_eeprom(u16 *eeprom, u32 offset)
+{
+	u32 addr;
+
+	if (BCMCPU_IS_6328()) {
+		addr = 0x18000000;
+	} else {
+		addr = bcm_mpi_readl(MPI_CSBASE_REG(0));
+		addr &= MPI_CSBASE_BASE_MASK;
+	}
+
+	switch (bcm63xx_flash_get_type()) {
+	case BCM63XX_FLASH_TYPE_PARALLEL:
+		memcpy(eeprom, (void *)KSEG1ADDR(addr + offset), ATH9K_PLAT_EEP_MAX_WORDS * sizeof(u16));
+		return eeprom;
+	case BCM63XX_FLASH_TYPE_SERIAL:
+		/* the first megabyte is memory mapped */
+		if (offset < 0x100000) {
+			memcpy(eeprom, (void *)KSEG1ADDR(addr + offset), ATH9K_PLAT_EEP_MAX_WORDS * sizeof(u16));
+			return eeprom;
+		}
+
+		if (BCMCPU_IS_6328()) {
+			/* we can change the memory mapped megabyte */
+			bcm_hsspi_writel(offset & 0xf00000, 0x18);
+			memcpy(eeprom, (void *)KSEG1ADDR(addr + (offset & 0xfffff)), ATH9K_PLAT_EEP_MAX_WORDS * sizeof(u16));
+			bcm_hsspi_writel(0, 0x18);
+			return eeprom;
+		}
+		/* can't do anything here without talking to the SPI controller. */
+	case BCM63XX_FLASH_TYPE_NAND:
+	default:
+		return NULL;
+	}
+}
+
+static void ath9k_pci_fixup(struct pci_dev *dev)
+{
+	void __iomem *mem;
+	struct ath9k_platform_data *pdata = NULL;
+	struct pci_dev *bridge = pci_upstream_bridge(dev);
+	u16 *cal_data = NULL;
+	u16 cmd;
+	u32 bar0;
+	u32 val;
+	unsigned i;
+
+	for (i = 0; i < ath9k_num_fixups; i++) {
+		if (ath9k_fixups[i].slot != PCI_SLOT(dev->devfn))
+			continue;
+
+		cal_data = ath9k_fixups[i].pdata.eeprom_data;
+		pdata = &ath9k_fixups[i].pdata;
+		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));
+
+	switch (bcm63xx_get_cpu_id()) {
+	case BCM6328_CPU_ID:
+		val = BCM_PCIE_MEM_BASE_PA_6328;
+		break;
+	case BCM6348_CPU_ID:
+	case BCM6358_CPU_ID:
+	case BCM6368_CPU_ID:
+		val = BCM_PCI_MEM_BASE_PA;
+		break;
+	default:
+		BUG();
+	}
+
+	mem = ioremap(val, 0x10000);
+	if (!mem) {
+		pr_err("pci %s: ioremap error\n", pci_name(dev));
+		return;
+	}
+
+	if (bridge)
+		pci_enable_device(bridge);
+
+	pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &bar0);
+	pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &bar0);
+	pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, val);
+
+	pci_read_config_word(dev, PCI_COMMAND, &cmd);
+	cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+	pci_write_config_word(dev, PCI_COMMAND, cmd);
+
+	/* set offset to first reg address */
+	cal_data += 3;
+	while(*cal_data != 0xffff) {
+		u32 reg;
+		reg = *cal_data++;
+		val = *cal_data++;
+		val |= (*cal_data++) << 16;
+
+		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);
+
+	if (bridge)
+		pci_disable_device(bridge);
+
+	iounmap(mem);
+
+	dev->dev.platform_data = pdata;
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATHEROS, PCI_ANY_ID, ath9k_pci_fixup);
+
+void __init pci_enable_ath9k_fixup(unsigned slot, u32 offset)
+{
+	if (ath9k_num_fixups >= ARRAY_SIZE(ath9k_fixups))
+		return;
+
+	ath9k_fixups[ath9k_num_fixups].slot = slot;
+
+	if (!bcm63xx_read_eeprom(ath9k_fixups[ath9k_num_fixups].pdata.eeprom_data, offset))
+		return;
+
+	if (bcm63xx_nvram_get_mac_address(ath9k_fixups[ath9k_num_fixups].mac))
+		return;
+
+	ath9k_fixups[ath9k_num_fixups].pdata.macaddr = ath9k_fixups[ath9k_num_fixups].mac;
+	ath9k_num_fixups++;
+}
--- /dev/null
+++ b/arch/mips/include/asm/mach-bcm63xx/pci_ath9k_fixup.h
@@ -0,0 +1,7 @@
+#ifndef _PCI_ATH9K_FIXUP
+#define _PCI_ATH9K_FIXUP
+
+
+void pci_enable_ath9k_fixup(unsigned slot, u32 offset) __init;
+
+#endif /* _PCI_ATH9K_FIXUP */
