af015f956c
Tested on the following boards: ALFA AP96 TL-MR3220 v1 TL-WR1043ND v1 TL-WR2543ND v1 TL-WR703N v1 TL-WR741ND v1 TL-WR741ND v4 WNDR3700 v1 WZR-HP-G300NH SVN-Revision: 29868
232 lines
6.1 KiB
Diff
232 lines
6.1 KiB
Diff
From 958e444a5a7750c407ed0c90af28f74295478e99 Mon Sep 17 00:00:00 2001
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From: Rene Bolldorf <xsecute@googlemail.com>
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Date: Thu, 17 Nov 2011 14:25:09 +0000
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Subject: [PATCH 17/27] MIPS: Initial PCI support for Atheros 724x SoCs.
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[ralf@linux-mips.org: Fixed the odd formatting of all break statements.]
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Signed-off-by: Rene Bolldorf <xsecute@googlemail.com>
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Cc: linux-mips@linux-mips.org
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Cc: linux-kernel@vger.kernel.org
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Patchwork: https://patchwork.linux-mips.org/patch/3019/
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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---
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arch/mips/include/asm/mach-ath79/pci-ath724x.h | 21 +++
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arch/mips/pci/Makefile | 1 +
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arch/mips/pci/pci-ath724x.c | 174 ++++++++++++++++++++++++
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3 files changed, 196 insertions(+), 0 deletions(-)
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create mode 100644 arch/mips/include/asm/mach-ath79/pci-ath724x.h
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create mode 100644 arch/mips/pci/pci-ath724x.c
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--- /dev/null
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+++ b/arch/mips/include/asm/mach-ath79/pci-ath724x.h
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@@ -0,0 +1,21 @@
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+/*
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+ * Atheros 724x PCI support
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+ *
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+ * Copyright (C) 2011 René Bolldorf <xsecute@googlemail.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License version 2 as published
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+ * by the Free Software Foundation.
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+ */
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+
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+#ifndef __ASM_MACH_ATH79_PCI_ATH724X_H
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+#define __ASM_MACH_ATH79_PCI_ATH724X_H
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+
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+struct ath724x_pci_data {
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+ int irq;
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+ void *pdata;
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+};
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+
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+void ath724x_pci_add_data(struct ath724x_pci_data *data, int size);
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+
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+#endif /* __ASM_MACH_ATH79_PCI_ATH724X_H */
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--- a/arch/mips/pci/Makefile
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+++ b/arch/mips/pci/Makefile
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@@ -19,6 +19,7 @@ obj-$(CONFIG_BCM47XX) += pci-bcm47xx.o
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obj-$(CONFIG_BCM63XX) += pci-bcm63xx.o fixup-bcm63xx.o \
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ops-bcm63xx.o
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obj-$(CONFIG_MIPS_ALCHEMY) += pci-alchemy.o
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+obj-$(CONFIG_SOC_AR724X) += pci-ath724x.o
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#
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# These are still pretty much in the old state, watch, go blind.
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--- /dev/null
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+++ b/arch/mips/pci/pci-ath724x.c
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@@ -0,0 +1,174 @@
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+/*
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+ * Atheros 724x PCI support
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+ *
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+ * Copyright (C) 2011 René Bolldorf <xsecute@googlemail.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License version 2 as published
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+ * by the Free Software Foundation.
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+ */
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+
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+#include <linux/pci.h>
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+#include <asm/mach-ath79/pci-ath724x.h>
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+
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+#define reg_read(_phys) (*(unsigned int *) KSEG1ADDR(_phys))
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+#define reg_write(_phys, _val) ((*(unsigned int *) KSEG1ADDR(_phys)) = (_val))
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+
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+#define ATH724X_PCI_DEV_BASE 0x14000000
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+#define ATH724X_PCI_MEM_BASE 0x10000000
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+#define ATH724X_PCI_MEM_SIZE 0x08000000
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+
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+static DEFINE_SPINLOCK(ath724x_pci_lock);
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+static struct ath724x_pci_data *pci_data;
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+static int pci_data_size;
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+
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+static int ath724x_pci_read(struct pci_bus *bus, unsigned int devfn, int where,
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+ int size, uint32_t *value)
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+{
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+ unsigned long flags, addr, tval, mask;
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+
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+ if (devfn)
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+ return PCIBIOS_DEVICE_NOT_FOUND;
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+
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+ if (where & (size - 1))
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+ return PCIBIOS_BAD_REGISTER_NUMBER;
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+
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+ spin_lock_irqsave(&ath724x_pci_lock, flags);
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+
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+ switch (size) {
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+ case 1:
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+ addr = where & ~3;
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+ mask = 0xff000000 >> ((where % 4) * 8);
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+ tval = reg_read(ATH724X_PCI_DEV_BASE + addr);
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+ tval = tval & ~mask;
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+ *value = (tval >> ((4 - (where % 4))*8));
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+ break;
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+ case 2:
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+ addr = where & ~3;
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+ mask = 0xffff0000 >> ((where % 4)*8);
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+ tval = reg_read(ATH724X_PCI_DEV_BASE + addr);
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+ tval = tval & ~mask;
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+ *value = (tval >> ((4 - (where % 4))*8));
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+ break;
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+ case 4:
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+ *value = reg_read(ATH724X_PCI_DEV_BASE + where);
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+ break;
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+ default:
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+ spin_unlock_irqrestore(&ath724x_pci_lock, flags);
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+
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+ return PCIBIOS_BAD_REGISTER_NUMBER;
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+ }
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+
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+ spin_unlock_irqrestore(&ath724x_pci_lock, flags);
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+
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+ return PCIBIOS_SUCCESSFUL;
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+}
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+
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+static int ath724x_pci_write(struct pci_bus *bus, unsigned int devfn, int where,
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+ int size, uint32_t value)
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+{
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+ unsigned long flags, tval, addr, mask;
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+
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+ if (devfn)
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+ return PCIBIOS_DEVICE_NOT_FOUND;
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+
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+ if (where & (size - 1))
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+ return PCIBIOS_BAD_REGISTER_NUMBER;
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+
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+ spin_lock_irqsave(&ath724x_pci_lock, flags);
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+
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+ switch (size) {
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+ case 1:
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+ addr = (ATH724X_PCI_DEV_BASE + where) & ~3;
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+ mask = 0xff000000 >> ((where % 4)*8);
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+ tval = reg_read(addr);
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+ tval = tval & ~mask;
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+ tval |= (value << ((4 - (where % 4))*8)) & mask;
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+ reg_write(addr, tval);
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+ break;
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+ case 2:
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+ addr = (ATH724X_PCI_DEV_BASE + where) & ~3;
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+ mask = 0xffff0000 >> ((where % 4)*8);
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+ tval = reg_read(addr);
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+ tval = tval & ~mask;
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+ tval |= (value << ((4 - (where % 4))*8)) & mask;
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+ reg_write(addr, tval);
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+ break;
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+ case 4:
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+ reg_write((ATH724X_PCI_DEV_BASE + where), value);
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+ break;
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+ default:
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+ spin_unlock_irqrestore(&ath724x_pci_lock, flags);
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+
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+ return PCIBIOS_BAD_REGISTER_NUMBER;
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+ }
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+
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+ spin_unlock_irqrestore(&ath724x_pci_lock, flags);
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+
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+ return PCIBIOS_SUCCESSFUL;
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+}
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+
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+static struct pci_ops ath724x_pci_ops = {
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+ .read = ath724x_pci_read,
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+ .write = ath724x_pci_write,
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+};
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+
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+static struct resource ath724x_io_resource = {
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+ .name = "PCI IO space",
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+ .start = 0,
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+ .end = 0,
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+ .flags = IORESOURCE_IO,
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+};
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+
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+static struct resource ath724x_mem_resource = {
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+ .name = "PCI memory space",
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+ .start = ATH724X_PCI_MEM_BASE,
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+ .end = ATH724X_PCI_MEM_BASE + ATH724X_PCI_MEM_SIZE - 1,
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+ .flags = IORESOURCE_MEM,
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+};
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+
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+static struct pci_controller ath724x_pci_controller = {
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+ .pci_ops = &ath724x_pci_ops,
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+ .io_resource = &ath724x_io_resource,
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+ .mem_resource = &ath724x_mem_resource,
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+};
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+
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+void ath724x_pci_add_data(struct ath724x_pci_data *data, int size)
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+{
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+ pci_data = data;
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+ pci_data_size = size;
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+}
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+
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+int __init pcibios_map_irq(const struct pci_dev *dev, uint8_t slot, uint8_t pin)
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+{
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+ unsigned int devfn = dev->devfn;
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+ int irq = -1;
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+
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+ if (devfn > pci_data_size - 1)
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+ return irq;
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+
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+ irq = pci_data[devfn].irq;
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+
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+ return irq;
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+}
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+
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+int pcibios_plat_dev_init(struct pci_dev *dev)
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+{
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+ unsigned int devfn = dev->devfn;
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+
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+ if (devfn > pci_data_size - 1)
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+ return PCIBIOS_DEVICE_NOT_FOUND;
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+
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+ dev->dev.platform_data = pci_data[devfn].pdata;
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+
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+ return PCIBIOS_SUCCESSFUL;
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+}
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+
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+static int __init ath724x_pcibios_init(void)
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+{
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+ register_pci_controller(&ath724x_pci_controller);
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+
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+ return PCIBIOS_SUCCESSFUL;
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+}
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+
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+arch_initcall(ath724x_pcibios_init);
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