path: root/target/linux/lantiq/patches/260-pci.patch

--- a/arch/mips/pci/Makefile
+++ b/arch/mips/pci/Makefile
@@ -55,6 +55,7 @@
 obj-$(CONFIG_WR_PPMC)		+= fixup-wrppmc.o
 obj-$(CONFIG_MIKROTIK_RB532)	+= pci-rc32434.o ops-rc32434.o fixup-rc32434.o
 obj-$(CONFIG_CPU_CAVIUM_OCTEON)	+= pci-octeon.o pcie-octeon.o
+obj-$(CONFIG_LANTIQ)			+= pci-lantiq.o ops-lantiq.o
 
 ifdef CONFIG_PCI_MSI
 obj-$(CONFIG_CPU_CAVIUM_OCTEON)	+= msi-octeon.o
--- /dev/null
+++ b/arch/mips/pci/ops-lantiq.c
@@ -0,0 +1,127 @@
+/*
+ *  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.
+ *
+ *  Copyright (C) 2010 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <asm/addrspace.h>
+#include <linux/vmalloc.h>
+
+#include <xway.h>
+
+#define LQ_PCI_CFG_BUSNUM_SHF 16
+#define LQ_PCI_CFG_DEVNUM_SHF 11
+#define LQ_PCI_CFG_FUNNUM_SHF 8
+
+#define PCI_ACCESS_READ  0
+#define PCI_ACCESS_WRITE 1
+
+extern u32 lq_pci_mapped_cfg;
+
+static int
+lq_pci_config_access(unsigned char access_type,
+		struct pci_bus *bus, unsigned int devfn, unsigned int where, u32 *data)
+{
+	unsigned long cfg_base;
+	unsigned long flags;
+
+	u32 temp;
+
+	/* we support slot from 0 to 15 */
+	/* dev_fn 0&0x68 (AD29) is ifxmips itself */
+	if ((bus->number != 0) || ((devfn & 0xf8) > 0x78)
+			|| ((devfn & 0xf8) == 0) || ((devfn & 0xf8) == 0x68))
+		return 1;
+
+	spin_lock_irqsave(&ebu_lock, flags);
+
+	cfg_base = lq_pci_mapped_cfg;
+	cfg_base |= (bus->number << LQ_PCI_CFG_BUSNUM_SHF) | (devfn <<
+			LQ_PCI_CFG_FUNNUM_SHF) | (where & ~0x3);
+
+	/* Perform access */
+	if (access_type == PCI_ACCESS_WRITE)
+	{
+#ifdef CONFIG_SWAP_IO_SPACE
+		lq_w32(swab32(*data), ((u32*)cfg_base));
+#else
+		lq_w32(*data, ((u32*)cfg_base));
+#endif
+	} else {
+		*data = lq_r32(((u32*)(cfg_base)));
+#ifdef CONFIG_SWAP_IO_SPACE
+		*data = swab32(*data);
+#endif
+	}
+	wmb();
+
+	/* clean possible Master abort */
+	cfg_base = (lq_pci_mapped_cfg | (0x0 << LQ_PCI_CFG_FUNNUM_SHF)) + 4;
+	temp = lq_r32(((u32*)(cfg_base)));
+#ifdef CONFIG_SWAP_IO_SPACE
+	temp = swab32 (temp);
+#endif
+	cfg_base = (lq_pci_mapped_cfg | (0x68 << LQ_PCI_CFG_FUNNUM_SHF)) + 4;
+	lq_w32(temp, ((u32*)cfg_base));
+
+	spin_unlock_irqrestore(&ebu_lock, flags);
+
+	if (((*data) == 0xffffffff) && (access_type == PCI_ACCESS_READ))
+		return 1;
+
+	return 0;
+}
+
+int
+lq_pci_read_config_dword(struct pci_bus *bus, unsigned int devfn,
+		int where, int size, u32 * val)
+{
+	u32 data = 0;
+
+	if (lq_pci_config_access(PCI_ACCESS_READ, bus, devfn, where, &data))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	if (size == 1)
+		*val = (data >> ((where & 3) << 3)) & 0xff;
+	else if (size == 2)
+		*val = (data >> ((where & 3) << 3)) & 0xffff;
+	else
+		*val = data;
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int
+lq_pci_write_config_dword(struct pci_bus *bus, unsigned int devfn,
+		int where, int size, u32 val)
+{
+	u32 data = 0;
+
+	if (size == 4)
+	{
+		data = val;
+	} else {
+		if (lq_pci_config_access(PCI_ACCESS_READ, bus, devfn, where, &data))
+			return PCIBIOS_DEVICE_NOT_FOUND;
+
+		if (size == 1)
+			data = (data & ~(0xff << ((where & 3) << 3))) |
+				(val << ((where & 3) << 3));
+		else if (size == 2)
+			data = (data & ~(0xffff << ((where & 3) << 3))) |
+				(val << ((where & 3) << 3));
+	}
+
+	if (lq_pci_config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	return PCIBIOS_SUCCESSFUL;
+}
--- /dev/null
+++ b/arch/mips/pci/pci-lantiq.c
@@ -0,0 +1,302 @@
+/*
+ *  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.
+ *
+ *  Copyright (C) 2010 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <linux/vmalloc.h>
+#include <linux/platform_device.h>
+
+#include <asm/gpio.h>
+#include <asm/addrspace.h>
+
+#include <xway.h>
+#include <xway_irq.h>
+#include <lantiq_platform.h>
+
+#define LQ_PCI_CFG_BASE		0x17000000
+#define LQ_PCI_CFG_SIZE		0x00008000
+#define LQ_PCI_MEM_BASE		0x18000000
+#define LQ_PCI_MEM_SIZE		0x02000000
+#define LQ_PCI_IO_BASE		0x1AE00000
+#define LQ_PCI_IO_SIZE		0x00200000
+
+#define PCI_CR_FCI_ADDR_MAP0		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x00C0))
+#define PCI_CR_FCI_ADDR_MAP1		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x00C4))
+#define PCI_CR_FCI_ADDR_MAP2		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x00C8))
+#define PCI_CR_FCI_ADDR_MAP3		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x00CC))
+#define PCI_CR_FCI_ADDR_MAP4		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x00D0))
+#define PCI_CR_FCI_ADDR_MAP5		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x00D4))
+#define PCI_CR_FCI_ADDR_MAP6		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x00D8))
+#define PCI_CR_FCI_ADDR_MAP7		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x00DC))
+#define PCI_CR_CLK_CTRL			((u32 *)(PCI_CR_PR_BASE_ADDR + 0x0000))
+#define PCI_CR_PCI_IRM			((u32 *)(PCI_CR_PR_BASE_ADDR + 0x0028))
+#define PCI_CR_PCI_MOD			((u32 *)(PCI_CR_PR_BASE_ADDR + 0x0030))
+#define PCI_CR_PC_ARB			((u32 *)(PCI_CR_PR_BASE_ADDR + 0x0080))
+#define PCI_CR_FCI_ADDR_MAP11hg		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x00E4))
+#define PCI_CR_BAR11MASK		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x0044))
+#define PCI_CR_BAR12MASK		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x0048))
+#define PCI_CR_BAR13MASK		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x004C))
+#define PCI_CR_PCI_ADDR_MAP11		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x0064))
+#define PCI_CR_FCI_BURST_LENGTH		((u32 *)(PCI_CR_PR_BASE_ADDR + 0x00E8))
+#define PCI_CR_PCI_EOI			((u32 *)(PCI_CR_PR_BASE_ADDR + 0x002C))
+
+#define PCI_CS_STS_CMD			((u32 *)(PCI_CS_PR_BASE_ADDR + 0x0004))
+#define PCI_CS_BASE_ADDR1		((u32 *)(PCI_CS_PR_BASE_ADDR + 0x0010))
+
+#define PCI_MASTER0_REQ_MASK_2BITS	8
+#define PCI_MASTER1_REQ_MASK_2BITS	10
+#define PCI_MASTER2_REQ_MASK_2BITS	12
+#define INTERNAL_ARB_ENABLE_BIT		0
+
+#define LQ_CGU_IFCCR		((u32 *)(LQ_CGU_BASE_ADDR + 0x0018))
+#define LQ_CGU_PCICR		((u32 *)(LQ_CGU_BASE_ADDR + 0x0034))
+
+extern int lq_pci_read_config_dword(struct pci_bus *bus,
+	unsigned int devfn, int where, int size, u32 *val);
+extern int lq_pci_write_config_dword(struct pci_bus *bus,
+	unsigned int devfn, int where, int size, u32 val);
+
+u32 lq_pci_mapped_cfg;
+
+int (*lqpci_plat_dev_init)(struct pci_dev *dev) = NULL;
+
+/* Since the PCI REQ pins can be reused for other functionality, make it possible
+   to exclude those from interpretation by the PCI controller */
+static int lq_pci_req_mask = 0xf;
+
+static int *lq_pci_irq_map;
+
+struct pci_ops lq_pci_ops =
+{
+	.read = lq_pci_read_config_dword,
+	.write = lq_pci_write_config_dword
+};
+
+static struct resource pci_io_resource =
+{
+	.name = "pci io space",
+	.start = LQ_PCI_IO_BASE,
+	.end = LQ_PCI_IO_BASE + LQ_PCI_IO_SIZE - 1,
+	.flags = IORESOURCE_IO
+};
+
+static struct resource pci_mem_resource =
+{
+	.name = "pci memory space",
+	.start = LQ_PCI_MEM_BASE,
+	.end = LQ_PCI_MEM_BASE + LQ_PCI_MEM_SIZE - 1,
+	.flags = IORESOURCE_MEM
+};
+
+static struct pci_controller lq_pci_controller =
+{
+	.pci_ops = &lq_pci_ops,
+	.mem_resource = &pci_mem_resource,
+	.mem_offset	= 0x00000000UL,
+	.io_resource = &pci_io_resource,
+	.io_offset	= 0x00000000UL,
+};
+
+int
+pcibios_plat_dev_init(struct pci_dev *dev)
+{
+	if (lqpci_plat_dev_init)
+		return lqpci_plat_dev_init(dev);
+
+	return 0;
+}
+
+static u32
+lq_calc_bar11mask(void)
+{
+	u32 mem, bar11mask;
+
+	/* BAR11MASK value depends on available memory on system. */
+	mem = num_physpages * PAGE_SIZE;
+	bar11mask = (0x0ffffff0 & ~((1 << (fls(mem) -1)) -1)) | 8;
+
+	return bar11mask;
+}
+
+struct ltq_pci_gpio_map {
+	int pin;
+	int alt0;
+	int alt1;
+	int dir;
+	char *name;
+};
+
+static struct ltq_pci_gpio_map gmap[] = {
+	{ 0, 1, 0, 0, "pci-exin0" },
+	{ 1, 1, 0, 0, "pci-exin1" },
+	{ 2, 1, 0, 0, "pci-exin2" },
+	{ 30, 1, 0, 1, "pci-gnt1" },
+	{ 23, 1, 0, 1, "pci-gnt2" },
+	{ 19, 1, 0, 1, "pci-gnt3" },
+	{ 29, 1, 0, 0, "pci-req1" },
+	{ 31, 1, 0, 0, "pci-req2" },
+	{ 3, 1, 0, 0, "pci-req3" },
+};
+
+static void
+lq_pci_setup_gpio(int gpio)
+{
+	int i;
+	for (i = 0; i < ARRAY_SIZE(gmap); i++)
+	{
+		if(gpio & (1 << i))
+		{
+			lq_gpio_request(gmap[i].pin, gmap[i].alt0,
+				gmap[i].alt1, gmap[i].dir, gmap[i].name);
+		}
+	}
+	for(i = 0; i < 3; i++)
+	{
+		if(gpio & (1 << i))
+		{
+			lq_w32(lq_r32((u32*)0xBF101000) | (0x6 << (i * 4)), (u32*)0xBF101000);
+			lq_w32(lq_r32((u32*)0xBF101004) & ~(1 << i), (u32*)0xBF101004);
+			lq_w32(lq_r32((u32*)0xBF10100C) | (1 << i), (u32*)0xBF10100C);
+		}
+	}
+	lq_gpio_request(21, 0, 0, 1, "pci-reset");
+	lq_pci_req_mask = (gpio >> PCI_REQ_SHIFT) & 0x7;
+}
+
+static int __init
+lq_pci_startup(struct lq_pci_data *conf)
+{
+	u32 temp_buffer;
+
+	/* set clock to 33Mhz */
+	lq_w32(lq_r32(LQ_CGU_IFCCR) & ~0xf00000, LQ_CGU_IFCCR);
+	lq_w32(lq_r32(LQ_CGU_IFCCR) | 0x800000,	LQ_CGU_IFCCR);
+	if (conf->clock == PCI_CLOCK_EXT)
+	{
+		lq_w32(lq_r32(LQ_CGU_IFCCR) & ~(1 << 16), LQ_CGU_IFCCR);
+		lq_w32((1 << 30), LQ_CGU_PCICR);
+	} else {
+		lq_w32(lq_r32(LQ_CGU_IFCCR) | (1 << 16), LQ_CGU_IFCCR);
+		lq_w32((1 << 31) | (1 << 30), LQ_CGU_PCICR);
+	}
+
+	/* setup pci clock and gpis used by pci */
+	lq_pci_setup_gpio(conf->gpio);
+
+	/* enable auto-switching between PCI and EBU */
+	lq_w32(0xa, PCI_CR_CLK_CTRL);
+
+	/* busy, i.e. configuration is not done, PCI access has to be retried */
+	lq_w32(lq_r32(PCI_CR_PCI_MOD) & ~(1 << 24), PCI_CR_PCI_MOD);
+	wmb ();
+	/* BUS Master/IO/MEM access */
+	lq_w32(lq_r32(PCI_CS_STS_CMD) | 7, PCI_CS_STS_CMD);
+
+	/* enable external 2 PCI masters */
+	temp_buffer = lq_r32(PCI_CR_PC_ARB);
+	temp_buffer &= (~((lq_pci_req_mask & 0xf) << 16));
+
+	/* enable internal arbiter */
+	temp_buffer |= (1 << INTERNAL_ARB_ENABLE_BIT);
+	/* enable internal PCI master reqest */
+	temp_buffer &= (~(3 << PCI_MASTER0_REQ_MASK_2BITS));
+
+	/* enable EBU request */
+	temp_buffer &= (~(3 << PCI_MASTER1_REQ_MASK_2BITS));
+
+	/* enable all external masters request */
+	temp_buffer &= (~(3 << PCI_MASTER2_REQ_MASK_2BITS));
+	lq_w32(temp_buffer, PCI_CR_PC_ARB);
+	wmb ();
+
+	/* setup BAR memory regions */
+	lq_w32(0x18000000, PCI_CR_FCI_ADDR_MAP0);
+	lq_w32(0x18400000, PCI_CR_FCI_ADDR_MAP1);
+	lq_w32(0x18800000, PCI_CR_FCI_ADDR_MAP2);
+	lq_w32(0x18c00000, PCI_CR_FCI_ADDR_MAP3);
+	lq_w32(0x19000000, PCI_CR_FCI_ADDR_MAP4);
+	lq_w32(0x19400000, PCI_CR_FCI_ADDR_MAP5);
+	lq_w32(0x19800000, PCI_CR_FCI_ADDR_MAP6);
+	lq_w32(0x19c00000, PCI_CR_FCI_ADDR_MAP7);
+	lq_w32(0x1ae00000, PCI_CR_FCI_ADDR_MAP11hg);
+
+	lq_w32(lq_calc_bar11mask(), PCI_CR_BAR11MASK);
+	lq_w32(0, PCI_CR_PCI_ADDR_MAP11);
+	lq_w32(0, PCI_CS_BASE_ADDR1);
+
+	/* both TX and RX endian swap are enabled */
+	lq_w32(lq_r32(PCI_CR_PCI_EOI) | 3, PCI_CR_PCI_EOI);
+	wmb ();
+
+	/*TODO: disable BAR2 & BAR3 - why was this in the origianl infineon code */
+	lq_w32(lq_r32(PCI_CR_BAR12MASK) | 0x80000000, PCI_CR_BAR12MASK);
+	lq_w32(lq_r32(PCI_CR_BAR13MASK) | 0x80000000, PCI_CR_BAR13MASK);
+
+	/* use 8 dw burst length */
+	lq_w32(0x303, PCI_CR_FCI_BURST_LENGTH);
+	lq_w32(lq_r32(PCI_CR_PCI_MOD) | (1 << 24), PCI_CR_PCI_MOD);
+	wmb();
+
+	/* setup irq line */
+	lq_w32(lq_r32(LQ_EBU_PCC_CON) | 0xc, LQ_EBU_PCC_CON);
+	lq_w32(lq_r32(LQ_EBU_PCC_IEN) | 0x10, LQ_EBU_PCC_IEN);
+
+	/* toggle reset pin */
+	__gpio_set_value(21, 0);
+	wmb();
+	mdelay(1);
+	__gpio_set_value(21, 1);
+	return 0;
+}
+
+int __init
+pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin){
+	if(lq_pci_irq_map[slot])
+		return lq_pci_irq_map[slot];
+	printk("lq_pci: trying to map irq for unknown slot %d\n", slot);
+	return 0;
+}
+
+static int
+lq_pci_probe(struct platform_device *pdev)
+{
+	struct lq_pci_data *lq_pci_data = (struct lq_pci_data*) pdev->dev.platform_data;
+	extern int pci_probe_only;
+	pci_probe_only = 0;
+	lq_pci_irq_map = lq_pci_data->irq;
+	lq_pci_startup(lq_pci_data);
+	lq_pci_mapped_cfg = 
+		(u32)ioremap_nocache(LQ_PCI_CFG_BASE, LQ_PCI_CFG_SIZE);
+	lq_pci_controller.io_map_base = mips_io_port_base + LQ_PCI_IO_BASE;
+	register_pci_controller(&lq_pci_controller);
+	return 0;
+}
+
+static struct platform_driver
+lq_pci_driver = {
+	.probe = lq_pci_probe,
+	.driver = {
+		.name = "lq_pci",
+		.owner = THIS_MODULE,
+	},
+};
+
+int __init
+pcibios_init(void)
+{
+	int ret = platform_driver_register(&lq_pci_driver);
+	if(ret)
+		printk(KERN_INFO "lq_pci: Error registering platfom driver!");
+	return ret;
+}
+
+arch_initcall(pcibios_init);