-/*
- * $Id$
- *
- * Copyright (C) 2006, 2007 OpenWrt.org
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/irq.h>
-#include <asm/ar7/vlynq.h>
-
-#define VLYNQ_PCI_SLOTS 2
-
-struct vlynq_reg_config {
- u32 offset;
- u32 value;
-};
-
-struct vlynq_pci_config {
- u32 chip_id;
- char name[32];
- struct vlynq_mapping rx_mapping[4];
- int irq;
- int irq_type;
- u32 chip;
- u32 class;
- int num_regs;
- struct vlynq_reg_config regs[10];
-};
-
-struct vlynq_pci_private {
- u32 latency;
- u32 cache_line;
- u32 command;
- u32 sz_mask;
- struct vlynq_pci_config *config;
-};
-
-static struct vlynq_pci_config known_devices[] = {
- {
- .chip_id = 0x00000009, .name = "TI ACX111",
- .rx_mapping = {
- { .size = 0x22000, .offset = 0xf0000000 },
- { .size = 0x40000, .offset = 0xc0000000 },
- { .size = 0x0, .offset = 0x0 },
- { .size = 0x0, .offset = 0x0 },
- },
- .irq = 0, .chip = 0x9066104c,
- .irq_type = IRQ_TYPE_EDGE_RISING,
- .class = PCI_CLASS_NETWORK_OTHER,
- .num_regs = 5,
- .regs = {
- { .offset = 0x790, .value = (0xd0000000 - (ARCH_PFN_OFFSET << PAGE_SHIFT)) },
- { .offset = 0x794, .value = (0xd0000000 - (ARCH_PFN_OFFSET << PAGE_SHIFT)) },
- { .offset = 0x740, .value = 0 },
- { .offset = 0x744, .value = 0x00010000 },
- { .offset = 0x764, .value = 0x00010000 },
- },
- },
-};
-
-static struct vlynq_device *slots[VLYNQ_PCI_SLOTS] = { NULL, };
-
-static struct resource vlynq_io_resource = {
- .start = 0x00000000,
- .end = 0x00000000,
- .name = "pci IO space",
- .flags = IORESOURCE_IO
-};
-
-static struct resource vlynq_mem_resource = {
- .start = 0x00000000,
- .end = 0x00000000,
- .name = "pci memory space",
- .flags = IORESOURCE_MEM
-};
-
-static inline u32 vlynq_get_mapped(struct vlynq_device *dev, int res)
-{
- int i;
- struct vlynq_pci_private *priv = dev->priv;
- u32 ret = dev->mem_start;
- if (!priv->config->rx_mapping[res].size) return 0;
- for (i = 0; i < res; i++)
- ret += priv->config->rx_mapping[i].size;
-
- return ret;
-}
-
-static inline u32 vlynq_read(u32 val, int size) {
- switch (size) {
- case 1:
- return *(u8 *)&val;
- case 2:
- return *(u16 *)&val;
- }
- return val;
-}
-
-static int vlynq_config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val)
-{
- struct vlynq_device *dev;
- struct vlynq_pci_private *priv;
- int resno, slot = PCI_SLOT(devfn);
-
- if ((size == 2) && (where & 1))
- return PCIBIOS_BAD_REGISTER_NUMBER;
- else if ((size == 4) && (where & 3))
- return PCIBIOS_BAD_REGISTER_NUMBER;
-
- if (slot >= VLYNQ_PCI_SLOTS)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- dev = slots[slot];
-
- if (!dev || (PCI_FUNC(devfn) > 0))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- priv = dev->priv;
-
- switch (where) {
- case PCI_VENDOR_ID:
- *val = vlynq_read(priv->config->chip, size);
- break;
- case PCI_DEVICE_ID:
- *val = priv->config->chip & 0xffff;
- case PCI_COMMAND:
- *val = priv->command;
- case PCI_STATUS:
-/* *val = PCI_STATUS_CAP_LIST;*/
- *val = 0;
- break;
- case PCI_CLASS_REVISION:
- *val = priv->config->class;
- break;
- case PCI_LATENCY_TIMER:
- *val = priv->latency;
- break;
- case PCI_HEADER_TYPE:
- *val = PCI_HEADER_TYPE_NORMAL;
- break;
- case PCI_CACHE_LINE_SIZE:
- *val = priv->cache_line;
- break;
- case PCI_BASE_ADDRESS_0:
- case PCI_BASE_ADDRESS_1:
- case PCI_BASE_ADDRESS_2:
- case PCI_BASE_ADDRESS_3:
- resno = (where - PCI_BASE_ADDRESS_0) >> 2;
- if (priv->sz_mask & (1 << resno)) {
- priv->sz_mask &= ~(1 << resno);
- *val = priv->config->rx_mapping[resno].size;
- } else {
- *val = vlynq_get_mapped(dev, resno);
- }
- break;
- case PCI_BASE_ADDRESS_4:
- case PCI_BASE_ADDRESS_5:
- case PCI_SUBSYSTEM_VENDOR_ID:
- case PCI_SUBSYSTEM_ID:
- case PCI_ROM_ADDRESS:
- case PCI_INTERRUPT_LINE:
- case PCI_CARDBUS_CIS:
- case PCI_CAPABILITY_LIST:
- *val = 0;
- break;
- case PCI_INTERRUPT_PIN:
- *val = 1;
- break;
- default:
- printk("%s: Read of unknown register 0x%x (size %d)\n",
- dev->dev.bus_id, where, size);
- return PCIBIOS_BAD_REGISTER_NUMBER;
- }
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int vlynq_config_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val)
-{
- struct vlynq_device *dev;
- struct vlynq_pci_private *priv;
- int resno, slot = PCI_SLOT(devfn);
-
- if ((size == 2) && (where & 1))
- return PCIBIOS_BAD_REGISTER_NUMBER;
- else if ((size == 4) && (where & 3))
- return PCIBIOS_BAD_REGISTER_NUMBER;
-
- if (slot >= VLYNQ_PCI_SLOTS)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- dev = slots[slot];
-
- if (!dev || (PCI_FUNC(devfn) > 0))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- priv = dev->priv;
-
- switch (where) {
- case PCI_VENDOR_ID:
- case PCI_DEVICE_ID:
- case PCI_STATUS:
- case PCI_CLASS_REVISION:
- case PCI_HEADER_TYPE:
- case PCI_CACHE_LINE_SIZE:
- case PCI_SUBSYSTEM_VENDOR_ID:
- case PCI_SUBSYSTEM_ID:
- case PCI_INTERRUPT_LINE:
- case PCI_INTERRUPT_PIN:
- case PCI_CARDBUS_CIS:
- case PCI_CAPABILITY_LIST:
- return PCIBIOS_FUNC_NOT_SUPPORTED;
- case PCI_COMMAND:
- priv->command = val;
- case PCI_LATENCY_TIMER:
- priv->latency = val;
- break;
- case PCI_BASE_ADDRESS_0:
- case PCI_BASE_ADDRESS_1:
- case PCI_BASE_ADDRESS_2:
- case PCI_BASE_ADDRESS_3:
- if (val == 0xffffffff) {
- resno = (where - PCI_BASE_ADDRESS_0) >> 2;
- priv->sz_mask |= (1 << resno);
- break;
- }
- case PCI_BASE_ADDRESS_4:
- case PCI_BASE_ADDRESS_5:
- case PCI_ROM_ADDRESS:
- break;
- default:
- printk("%s: Write to unknown register 0x%x (size %d) value=0x%x\n",
- dev->dev.bus_id, where, size, val);
- return PCIBIOS_BAD_REGISTER_NUMBER;
- }
- return PCIBIOS_SUCCESSFUL;
-}
-
-static struct pci_ops vlynq_pci_ops = {
- vlynq_config_read,
- vlynq_config_write
-};
-
-static struct pci_controller vlynq_controller = {
- .pci_ops = &vlynq_pci_ops,
- .io_resource = &vlynq_io_resource,
- .mem_resource = &vlynq_mem_resource,
-};
-
-static int vlynq_pci_probe(struct vlynq_device *dev)
-{
- int result, i;
- u32 chip_id, addr;
- struct vlynq_pci_private *priv;
- struct vlynq_mapping mapping[4] = { { 0, }, };
- struct vlynq_pci_config *config = NULL;
-
- result = vlynq_set_local_irq(dev, 31);
- if (result)
- return result;
-
- result = vlynq_set_remote_irq(dev, 30);
- if (result)
- return result;
-
- result = vlynq_device_enable(dev);
- if (result)
- return result;
-
- chip_id = vlynq_remote_id(dev);
- for (i = 0; i < ARRAY_SIZE(known_devices); i++)
- if (chip_id == known_devices[i].chip_id)
- config = &known_devices[i];
-
- if (!config) {
- printk("vlynq-pci: skipping unknown device "
- "%04x:%04x at %s\n", chip_id >> 16,
- chip_id & 0xffff, dev->dev.bus_id);
- result = -ENODEV;
- goto fail;
- }
-
- printk("vlynq-pci: attaching device %s at %s\n",
- config->name, dev->dev.bus_id);
-
- priv = kmalloc(sizeof(struct vlynq_pci_private), GFP_KERNEL);
- if (!priv) {
- printk(KERN_ERR "%s: failed to allocate private data\n",
- dev->dev.bus_id);
- result = -ENOMEM;
- goto fail;
- }
-
- memset(priv, 0, sizeof(struct vlynq_pci_private));
- priv->latency = 64;
- priv->cache_line = 32;
- priv->config = config;
-
- mapping[0].offset = ARCH_PFN_OFFSET << PAGE_SHIFT;
- mapping[0].size = 0x02000000;
- vlynq_set_local_mapping(dev, dev->mem_start, mapping);
- vlynq_set_remote_mapping(dev, 0, config->rx_mapping);
-
- set_irq_type(vlynq_virq_to_irq(dev, config->irq), config->irq_type);
-
- addr = (u32)ioremap_nocache(dev->mem_start, 0x10000);
- if (!addr) {
- printk(KERN_ERR "%s: failed to remap io memory\n",
- dev->dev.bus_id);
- result = -ENXIO;
- goto fail;
- }
-
- for (i = 0; i < config->num_regs; i++)
- *(volatile u32 *)(addr + config->regs[i].offset) =
- config->regs[i].value;
-
- dev->priv = priv;
- for (i = 0; i < VLYNQ_PCI_SLOTS; i++) {
- if (!slots[i]) {
- slots[i] = dev;
- break;
- }
- }
-
- return 0;
-
-fail:
- vlynq_device_disable(dev);
-
- return result;
-}
-
-static int vlynq_pci_remove(struct vlynq_device *dev)
-{
- int i;
- struct vlynq_pci_private *priv = dev->priv;
-
- for (i = 0; i < VLYNQ_PCI_SLOTS; i++)
- if (slots[i] == dev)
- slots[i] = NULL;
-
- vlynq_device_disable(dev);
- kfree(priv);
-
- return 0;
-}
-
-static struct vlynq_driver vlynq_pci = {
- .name = "PCI over VLYNQ emulation",
- .probe = vlynq_pci_probe,
- .remove = vlynq_pci_remove,
-};
-
-int vlynq_pci_init(void)
-{
- int res;
- res = vlynq_register_driver(&vlynq_pci);
- if (res)
- return res;
-
- register_pci_controller(&vlynq_controller);
-
- return 0;
-}
-
-int pcibios_map_irq(struct pci_dev *pdev, u8 slot, u8 pin)
-{
- struct vlynq_device *dev;
- struct vlynq_pci_private *priv;
-
- dev = slots[slot];
-
- if (!dev)
- return 0;
-
- priv = dev->priv;
-
- return vlynq_virq_to_irq(dev, priv->config->irq);
-}
-
-/* Do platform specific device initialization at pci_enable_device() time */
-int pcibios_plat_dev_init(struct pci_dev *dev)
-{
- return 0;
-}
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