* [RFC v3 1/5] PCI: initial commit
2014-06-25 22:32 [RFC v3 0/5] barebox PCI support Antony Pavlov
@ 2014-06-25 22:32 ` Antony Pavlov
2014-06-30 10:18 ` Lucas Stach
2014-06-25 22:32 ` [RFC v3 2/5] commands: add 'lspci' command Antony Pavlov
` (3 subsequent siblings)
4 siblings, 1 reply; 11+ messages in thread
From: Antony Pavlov @ 2014-06-25 22:32 UTC (permalink / raw)
To: barebox; +Cc: Clément Leger
used shorten version of linux-2.6.39 pci_ids.h
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
drivers/Makefile | 1 +
drivers/pci/Kconfig | 12 ++
drivers/pci/Makefile | 8 ++
drivers/pci/bus.c | 110 ++++++++++++++++
drivers/pci/pci.c | 282 ++++++++++++++++++++++++++++++++++++++++
include/linux/mod_devicetable.h | 20 +++
include/linux/pci.h | 241 ++++++++++++++++++++++++++++++++++
include/linux/pci_ids.h | 136 +++++++++++++++++++
include/linux/pci_regs.h | 118 +++++++++++++++++
9 files changed, 928 insertions(+)
create mode 100644 drivers/pci/Kconfig
create mode 100644 drivers/pci/Makefile
create mode 100644 drivers/pci/bus.c
create mode 100644 drivers/pci/pci.c
create mode 100644 include/linux/mod_devicetable.h
create mode 100644 include/linux/pci.h
create mode 100644 include/linux/pci_ids.h
create mode 100644 include/linux/pci_regs.h
diff --git a/drivers/Makefile b/drivers/Makefile
index ef3604f..1990e86 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -26,3 +26,4 @@ obj-y += pinctrl/
obj-y += bus/
obj-$(CONFIG_REGULATOR) += regulator/
obj-$(CONFIG_RESET_CONTROLLER) += reset/
+obj-$(CONFIG_PCI) += pci/
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
new file mode 100644
index 0000000..88b8dfb
--- /dev/null
+++ b/drivers/pci/Kconfig
@@ -0,0 +1,12 @@
+#
+# PCI configuration
+#
+config PCI_DEBUG
+ bool "PCI Debugging"
+ depends on PCI
+ help
+ Say Y here if you want the PCI core to produce a bunch of debug
+ messages to the system log. Select this if you are having a
+ problem with PCI support and want to see more of what is going on.
+
+ When in doubt, say N.
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
new file mode 100644
index 0000000..c7d43c3
--- /dev/null
+++ b/drivers/pci/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for the PCI bus specific drivers.
+#
+obj-y += pci.o bus.o
+
+ccflags-$(CONFIG_PCI_DEBUG) := -DDEBUG
+
+CPPFLAGS += $(ccflags-y)
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
new file mode 100644
index 0000000..8215ee5
--- /dev/null
+++ b/drivers/pci/bus.c
@@ -0,0 +1,110 @@
+#include <common.h>
+#include <init.h>
+#include <driver.h>
+#include <linux/pci.h>
+
+/**
+ * pci_match_one_device - Tell if a PCI device structure has a matching
+ * PCI device id structure
+ * @id: single PCI device id structure to match
+ * @dev: the PCI device structure to match against
+ *
+ * Returns the matching pci_device_id structure or %NULL if there is no match.
+ */
+static inline const struct pci_device_id *
+pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
+{
+ if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
+ (id->device == PCI_ANY_ID || id->device == dev->device) &&
+ (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
+ (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
+ !((id->class ^ dev->class) & id->class_mask))
+ return id;
+ return NULL;
+}
+
+static int pci_match(struct device_d *dev, struct driver_d *drv)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct pci_driver *pdrv = to_pci_driver(drv);
+ struct pci_device_id *id;
+
+ for (id = (struct pci_device_id *)pdrv->id_table; id->vendor; id++)
+ if (pci_match_one_device(id, pdev)) {
+ dev->priv = id;
+ return 0;
+ }
+
+ return -1;
+}
+
+static int pci_probe(struct device_d *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct pci_driver *pdrv = to_pci_driver(dev->driver);
+
+ return pdrv->probe(pdev, dev->priv);
+}
+
+static void pci_remove(struct device_d *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct pci_driver *pdrv = to_pci_driver(dev->driver);
+
+ pdrv->remove(pdev);
+}
+
+struct bus_type pci_bus = {
+ .name = "pci",
+ .match = pci_match,
+ .probe = pci_probe,
+ .remove = pci_remove,
+};
+
+static int pci_bus_init(void)
+{
+ return bus_register(&pci_bus);
+}
+pure_initcall(pci_bus_init);
+
+int pci_register_driver(struct pci_driver *pdrv)
+{
+ struct driver_d *drv = &pdrv->driver;
+
+ if (!pdrv->id_table)
+ return -EIO;
+
+ drv->name = pdrv->name;
+ drv->bus = &pci_bus;
+
+ return register_driver(drv);
+}
+
+int pci_register_device(struct pci_dev *pdev)
+{
+ char str[6];
+ struct device_d *dev = &pdev->dev;
+ int ret;
+
+ strcpy(dev->name, "pci");
+ dev->bus = &pci_bus;
+ dev->id = DEVICE_ID_DYNAMIC;
+
+ ret = register_device(dev);
+
+ if (ret)
+ return ret;
+
+ sprintf(str, "%02x", pdev->devfn);
+ dev_add_param_fixed(dev, "devfn", str);
+ sprintf(str, "%04x", (pdev->class >> 8) & 0xffff);
+ dev_add_param_fixed(dev, "class", str);
+ sprintf(str, "%04x", pdev->vendor);
+ dev_add_param_fixed(dev, "vendor", str);
+ sprintf(str, "%04x", pdev->device);
+ dev_add_param_fixed(dev, "device", str);
+ sprintf(str, "%04x", pdev->revision);
+ dev_add_param_fixed(dev, "revision", str);
+
+ return 0;
+}
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
new file mode 100644
index 0000000..9bee73f
--- /dev/null
+++ b/drivers/pci/pci.c
@@ -0,0 +1,282 @@
+#include <common.h>
+#include <linux/pci.h>
+
+#ifdef DEBUG
+#define DBG(x...) printk(x)
+#else
+#define DBG(x...)
+#endif
+
+static struct pci_controller *hose_head, **hose_tail = &hose_head;
+
+struct pci_bus *pci_root;
+
+static struct pci_bus *pci_alloc_bus(void)
+{
+ struct pci_bus *b;
+
+ b = kzalloc(sizeof(*b), GFP_KERNEL);
+ if (b) {
+ INIT_LIST_HEAD(&b->node);
+ INIT_LIST_HEAD(&b->children);
+ INIT_LIST_HEAD(&b->devices);
+ INIT_LIST_HEAD(&b->slots);
+ INIT_LIST_HEAD(&b->resources);
+ }
+ return b;
+}
+
+void register_pci_controller(struct pci_controller *hose)
+{
+ struct pci_bus *bus;
+
+ *hose_tail = hose;
+ hose_tail = &hose->next;
+
+ bus = pci_alloc_bus();
+ hose->bus = bus;
+ bus->ops = hose->pci_ops;
+ bus->resource[0] = hose->mem_resource;
+ bus->resource[1] = hose->io_resource;
+
+ pci_scan_bus(bus);
+
+ pci_root = bus;
+
+ return;
+}
+
+int
+pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn, u8 where, u8 *val)
+{
+ u32 data;
+ int status;
+
+ status = bus->ops->read(bus, devfn, where & 0xfc, 4, &data);
+ *val = (u8) (data >> ((where & 3) << 3));
+ return status;
+}
+
+int
+pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn, u8 where, u16 *val)
+{
+ u32 data;
+ int status;
+
+ status = bus->ops->read(bus, devfn, where & 0xfc, 4, &data);
+ *val = (u16) (data >> ((where & 3) << 3));
+ return status;
+}
+
+int
+pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn, u8 where, u32 *val)
+{
+ return bus->ops->read(bus, devfn, where, 4, val);
+}
+
+int
+pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn, u8 where, u8 val)
+{
+ u32 data;
+ int status;
+
+ bus->ops->read(bus, devfn, where & 0xfc, 4, &data);
+ data = (data & ~(0xff << ((where & 3) << 3))) | (val << ((where & 3) << 3));
+ status = bus->ops->write(bus, devfn, where & 0xfc, 4, data);
+
+ return status;
+}
+
+int
+pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn, u8 where, u16 val)
+{
+ u32 data;
+ int status;
+
+ bus->ops->read(bus, devfn, where & 0xfc, 4, &data);
+ data = (data & ~(0xffff << ((where & 3) << 3))) | (val << ((where & 3) << 3));
+ status = bus->ops->write(bus, devfn, where & 0xfc, 4, data);
+
+ return status;
+}
+
+int
+pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn, u8 where, u32 val)
+{
+ return bus->ops->write(bus, devfn, where, 4, val);
+}
+
+int
+pci_read_config_byte(struct pci_dev *dev, u8 where, u8 *val)
+{
+ return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
+}
+
+int
+pci_read_config_word(struct pci_dev *dev, u8 where, u16 *val)
+{
+ return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
+}
+
+int
+pci_read_config_dword(struct pci_dev *dev, u8 where, u32 *val)
+{
+ return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
+}
+
+int
+pci_write_config_byte(struct pci_dev *dev, u8 where, u8 val)
+{
+ return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
+}
+
+int
+pci_write_config_word(struct pci_dev *dev, u8 where, u16 val)
+{
+ return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
+}
+
+int
+pci_write_config_dword(struct pci_dev *dev, u8 where, u32 val)
+{
+ return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
+}
+
+static struct pci_dev *alloc_pci_dev(void)
+{
+ struct pci_dev *dev;
+
+ dev = kzalloc(sizeof(struct pci_dev), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+
+ INIT_LIST_HEAD(&dev->bus_list);
+
+ return dev;
+}
+
+unsigned int pci_scan_bus(struct pci_bus *bus)
+{
+ unsigned int devfn, l, max, class;
+ unsigned char cmd, tmp, hdr_type, is_multi = 0;
+ struct pci_dev *dev;
+ resource_size_t last_mem;
+ resource_size_t last_io;
+
+ /* FIXME: use res_start() */
+ last_mem = bus->resource[0]->start;
+ last_io = bus->resource[1]->start;
+
+ DBG("pci_scan_bus for bus %d\n", bus->number);
+ DBG(" last_io = 0x%08x, last_mem = 0x%08x\n", last_io, last_mem);
+ max = bus->secondary;
+
+ for (devfn = 0; devfn < 0xff; ++devfn) {
+ int bar;
+ u32 old_bar, mask;
+ int size;
+
+ if (PCI_FUNC(devfn) && !is_multi) {
+ /* not a multi-function device */
+ continue;
+ }
+ if (pci_bus_read_config_byte(bus, devfn, PCI_HEADER_TYPE, &hdr_type))
+ continue;
+ if (!PCI_FUNC(devfn))
+ is_multi = hdr_type & 0x80;
+
+ if (pci_bus_read_config_dword(bus, devfn, PCI_VENDOR_ID, &l) ||
+ /* some broken boards return 0 if a slot is empty: */
+ l == 0xffffffff || l == 0x00000000 || l == 0x0000ffff || l == 0xffff0000)
+ continue;
+
+ dev = alloc_pci_dev();
+ if (!dev)
+ return 0;
+
+ dev->bus = bus;
+ dev->devfn = devfn;
+ dev->vendor = l & 0xffff;
+ dev->device = (l >> 16) & 0xffff;
+
+ /* non-destructively determine if device can be a master: */
+ pci_read_config_byte(dev, PCI_COMMAND, &cmd);
+ pci_write_config_byte(dev, PCI_COMMAND, cmd | PCI_COMMAND_MASTER);
+ pci_read_config_byte(dev, PCI_COMMAND, &tmp);
+ pci_write_config_byte(dev, PCI_COMMAND, cmd);
+
+ pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
+ dev->revision = class & 0xff;
+ class >>= 8; /* upper 3 bytes */
+ dev->class = class;
+ class >>= 8;
+ dev->hdr_type = hdr_type;
+
+ DBG("PCI: class = %08x, hdr_type = %08x\n", class, hdr_type);
+
+ switch (hdr_type & 0x7f) { /* header type */
+ case PCI_HEADER_TYPE_NORMAL: /* standard header */
+ if (class == PCI_CLASS_BRIDGE_PCI)
+ goto bad;
+
+ /*
+ * read base address registers, again pcibios_fixup() can
+ * tweak these
+ */
+ pci_read_config_dword(dev, PCI_ROM_ADDRESS, &l);
+ dev->rom_address = (l == 0xffffffff) ? 0 : l;
+ break;
+ default: /* unknown header */
+ bad:
+ printk(KERN_ERR "PCI: %02x:%02x [%04x/%04x/%06x] has unknown header type %02x, ignoring.\n",
+ bus->number, dev->devfn, dev->vendor, dev->device, class, hdr_type);
+ continue;
+ }
+
+ DBG("PCI: %02x:%02x [%04x/%04x]\n", bus->number, dev->devfn, dev->vendor, dev->device);
+
+ list_add_tail(&dev->bus_list, &bus->devices);
+ pci_register_device(dev);
+
+ if (class == PCI_CLASS_BRIDGE_HOST) {
+ DBG("PCI: skip pci host bridge\n");
+ continue;
+ }
+
+ for (bar = 0; bar < 6; bar++) {
+ pci_read_config_dword(dev, PCI_BASE_ADDRESS_0 + bar * 4, &old_bar);
+ pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + bar * 4, 0xfffffffe);
+ pci_read_config_dword(dev, PCI_BASE_ADDRESS_0 + bar * 4, &mask);
+ pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + bar * 4, old_bar);
+
+ if (mask == 0 || mask == 0xffffffff) {
+ DBG(" PCI: pbar%d set bad mask\n", bar);
+ continue;
+ }
+
+ if (mask & 0x01) { /* IO */
+ size = -(mask & 0xfffffffe);
+ DBG(" PCI: pbar%d: mask=%08x io %d bytes\n", bar, mask, size);
+ pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + bar * 4, last_io);
+ last_io += size;
+
+ } else { /* MEM */
+ size = -(mask & 0xfffffff0);
+ DBG(" PCI: pbar%d: mask=%08x memory %d bytes\n", bar, mask, size);
+ pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + bar * 4, last_mem);
+ last_mem += size;
+ }
+ }
+ }
+
+ /*
+ * We've scanned the bus and so we know all about what's on
+ * the other side of any bridges that may be on this bus plus
+ * any devices.
+ *
+ * Return how far we've got finding sub-buses.
+ */
+ DBG("PCI: pci_scan_bus returning with max=%02x\n", max);
+
+ return max;
+}
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
new file mode 100644
index 0000000..c822075
--- /dev/null
+++ b/include/linux/mod_devicetable.h
@@ -0,0 +1,20 @@
+/*
+ * Device tables which are exported to userspace via
+ * scripts/mod/file2alias.c. You must keep that file in sync with this
+ * header.
+ */
+
+#ifndef LINUX_MOD_DEVICETABLE_H
+#define LINUX_MOD_DEVICETABLE_H
+
+#include <linux/types.h>
+
+#define PCI_ANY_ID (~0)
+
+struct pci_device_id {
+ __u32 vendor, device; /* Vendor and device ID or PCI_ANY_ID*/
+ __u32 subvendor, subdevice; /* Subsystem ID's or PCI_ANY_ID */
+ __u32 class, class_mask; /* (class,subclass,prog-if) triplet */
+};
+
+#endif /* LINUX_MOD_DEVICETABLE_H */
diff --git a/include/linux/pci.h b/include/linux/pci.h
new file mode 100644
index 0000000..1411692
--- /dev/null
+++ b/include/linux/pci.h
@@ -0,0 +1,241 @@
+/*
+ * pci.h
+ *
+ * PCI defines and function prototypes
+ * Copyright 1994, Drew Eckhardt
+ * Copyright 1997--1999 Martin Mares <mj@ucw.cz>
+ *
+ * For more information, please consult the following manuals (look at
+ * http://www.pcisig.com/ for how to get them):
+ *
+ * PCI BIOS Specification
+ * PCI Local Bus Specification
+ * PCI to PCI Bridge Specification
+ * PCI System Design Guide
+ */
+#ifndef LINUX_PCI_H
+#define LINUX_PCI_H
+
+#include <linux/mod_devicetable.h>
+
+#include <linux/pci_regs.h>
+#include <linux/types.h>
+#include <linux/ioport.h>
+#include <linux/list.h>
+#include <linux/compiler.h>
+#include <errno.h>
+#include <io.h>
+
+#include <linux/pci_ids.h>
+
+
+/*
+ * The PCI interface treats multi-function devices as independent
+ * devices. The slot/function address of each device is encoded
+ * in a single byte as follows:
+ *
+ * 7:3 = slot
+ * 2:0 = function
+ */
+#define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
+#define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
+#define PCI_FUNC(devfn) ((devfn) & 0x07)
+
+
+/*
+ * Error values that may be returned by PCI functions.
+ */
+#define PCIBIOS_SUCCESSFUL 0x00
+#define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
+#define PCIBIOS_BAD_VENDOR_ID 0x83
+#define PCIBIOS_DEVICE_NOT_FOUND 0x86
+#define PCIBIOS_BAD_REGISTER_NUMBER 0x87
+#define PCIBIOS_SET_FAILED 0x88
+#define PCIBIOS_BUFFER_TOO_SMALL 0x89
+
+#define DEVICE_COUNT_RESOURCE 12
+#define PCI_BRIDGE_RESOURCE_NUM 2
+
+/*
+ * The pci_dev structure is used to describe PCI devices.
+ */
+struct pci_dev {
+ struct list_head bus_list; /* node in per-bus list */
+ struct pci_bus *bus; /* bus this device is on */
+ struct pci_bus *subordinate; /* bus this device bridges to */
+
+ void *sysdata; /* hook for sys-specific extension */
+ struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
+ struct pci_slot *slot; /* Physical slot this device is in */
+
+ struct device_d dev;
+
+ unsigned int devfn; /* encoded device & function index */
+ unsigned short vendor;
+ unsigned short device;
+ unsigned short subsystem_vendor;
+ unsigned short subsystem_device;
+ unsigned int class; /* 3 bytes: (base,sub,prog-if) */
+ u8 revision; /* PCI revision, low byte of class word */
+ u8 hdr_type; /* PCI header type (`multi' flag masked out) */
+
+ struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
+
+ /* Base registers for this device, can be adjusted by
+ * pcibios_fixup() as necessary.
+ */
+ unsigned long base_address[6];
+ unsigned long rom_address;
+};
+#define to_pci_dev(dev) container_of(dev, struct pci_dev, dev)
+
+struct pci_bus {
+ struct list_head node; /* node in list of buses */
+ struct pci_bus *parent; /* parent bus this bridge is on */
+ struct list_head children; /* list of child buses */
+ struct list_head devices; /* list of devices on this bus */
+ struct pci_dev *self; /* bridge device as seen by parent */
+ struct list_head slots; /* list of slots on this bus */
+ struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
+ struct list_head resources; /* address space routed to this bus */
+
+ struct pci_ops *ops; /* configuration access functions */
+ void *sysdata; /* hook for sys-specific extension */
+ struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
+
+ unsigned char number; /* bus number */
+ unsigned char primary; /* number of primary bridge */
+ unsigned char secondary; /* number of secondary bridge */
+ unsigned char subordinate; /* max number of subordinate buses */
+
+ char name[48];
+};
+
+/* Low-level architecture-dependent routines */
+
+struct pci_ops {
+ int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
+ int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
+
+ /* return memory address for pci resource */
+ int (*res_start)(struct pci_bus *bus, resource_size_t res_addr);
+};
+
+extern struct pci_ops *pci_ops;
+
+/*
+ * Each pci channel is a top-level PCI bus seem by CPU. A machine with
+ * multiple PCI channels may have multiple PCI host controllers or a
+ * single controller supporting multiple channels.
+ */
+struct pci_controller {
+ struct pci_controller *next;
+ struct pci_bus *bus;
+
+ struct pci_ops *pci_ops;
+ struct resource *mem_resource;
+ unsigned long mem_offset;
+ struct resource *io_resource;
+ unsigned long io_offset;
+ unsigned long io_map_base;
+
+ unsigned int index;
+
+ /* Optional access methods for reading/writing the bus number
+ of the PCI controller */
+ int (*get_busno)(void);
+ void (*set_busno)(int busno);
+};
+
+struct pci_driver {
+ struct list_head node;
+ const char *name;
+ const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
+ int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
+ void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
+ struct driver_d driver;
+};
+
+#define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
+
+/**
+ * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
+ * @_table: device table name
+ *
+ * This macro is used to create a struct pci_device_id array (a device table)
+ * in a generic manner.
+ */
+#define DEFINE_PCI_DEVICE_TABLE(_table) \
+ const struct pci_device_id _table[]
+
+/**
+ * PCI_DEVICE - macro used to describe a specific pci device
+ * @vend: the 16 bit PCI Vendor ID
+ * @dev: the 16 bit PCI Device ID
+ *
+ * This macro is used to create a struct pci_device_id that matches a
+ * specific device. The subvendor and subdevice fields will be set to
+ * PCI_ANY_ID.
+ */
+#define PCI_DEVICE(vend, dev) \
+ .vendor = (vend), .device = (dev), \
+ .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
+
+/**
+ * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
+ * @dev_class: the class, subclass, prog-if triple for this device
+ * @dev_class_mask: the class mask for this device
+ *
+ * This macro is used to create a struct pci_device_id that matches a
+ * specific PCI class. The vendor, device, subvendor, and subdevice
+ * fields will be set to PCI_ANY_ID.
+ */
+#define PCI_DEVICE_CLASS(dev_class, dev_class_mask) \
+ .class = (dev_class), .class_mask = (dev_class_mask), \
+ .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
+ .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
+
+/**
+ * PCI_VDEVICE - macro used to describe a specific pci device in short form
+ * @vend: the vendor name
+ * @dev: the 16 bit PCI Device ID
+ *
+ * This macro is used to create a struct pci_device_id that matches a
+ * specific PCI device. The subvendor, and subdevice fields will be set
+ * to PCI_ANY_ID. The macro allows the next field to follow as the device
+ * private data.
+ */
+
+#define PCI_VDEVICE(vend, dev) \
+ .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
+ .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
+
+int pci_register_driver(struct pci_driver *pdrv);
+int pci_register_device(struct pci_dev *pdev);
+
+extern struct pci_bus *pci_root;
+
+extern unsigned int pci_scan_bus(struct pci_bus *bus);
+extern void register_pci_controller(struct pci_controller *hose);
+
+extern int pci_bus_read_config_byte(struct pci_bus *bus,
+ unsigned int devfn, u8 where, u8 *val);
+extern int pci_bus_read_config_word(struct pci_bus *bus,
+ unsigned int devfn, u8 where, u16 *val);
+extern int pci_bus_read_config_dword(struct pci_bus *bus,
+ unsigned int devfn, u8 where, u32 *val);
+extern int pci_bus_write_config_byte(struct pci_bus *bus,
+ unsigned int devfn, u8 where, u8 val);
+extern int pci_bus_write_config_word(struct pci_bus *bus,
+ unsigned int devfn, u8 where, u16 val);
+extern int pci_bus_write_config_dword(struct pci_bus *bus,
+ unsigned int devfn, u8 where, u32 val);
+
+extern int pci_read_config_byte(struct pci_dev *dev, u8 where, u8 *val);
+extern int pci_read_config_word(struct pci_dev *dev, u8 where, u16 *val);
+extern int pci_read_config_dword(struct pci_dev *dev, u8 where, u32 *val);
+extern int pci_write_config_byte(struct pci_dev *dev, u8 where, u8 val);
+extern int pci_write_config_word(struct pci_dev *dev, u8 where, u16 val);
+extern int pci_write_config_dword(struct pci_dev *dev, u8 where, u32 val);
+
+#endif /* LINUX_PCI_H */
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
new file mode 100644
index 0000000..49e2954
--- /dev/null
+++ b/include/linux/pci_ids.h
@@ -0,0 +1,136 @@
+/*
+ * PCI Class, Vendor and Device IDs
+ *
+ * Please keep sorted.
+ *
+ * Do not add new entries to this file unless the definitions
+ * are shared between multiple drivers.
+ */
+
+/* Device classes and subclasses */
+
+#define PCI_CLASS_NOT_DEFINED 0x0000
+#define PCI_CLASS_NOT_DEFINED_VGA 0x0001
+
+#define PCI_BASE_CLASS_STORAGE 0x01
+#define PCI_CLASS_STORAGE_SCSI 0x0100
+#define PCI_CLASS_STORAGE_IDE 0x0101
+#define PCI_CLASS_STORAGE_FLOPPY 0x0102
+#define PCI_CLASS_STORAGE_IPI 0x0103
+#define PCI_CLASS_STORAGE_RAID 0x0104
+#define PCI_CLASS_STORAGE_SATA 0x0106
+#define PCI_CLASS_STORAGE_SATA_AHCI 0x010601
+#define PCI_CLASS_STORAGE_SAS 0x0107
+#define PCI_CLASS_STORAGE_OTHER 0x0180
+
+#define PCI_BASE_CLASS_NETWORK 0x02
+#define PCI_CLASS_NETWORK_ETHERNET 0x0200
+#define PCI_CLASS_NETWORK_TOKEN_RING 0x0201
+#define PCI_CLASS_NETWORK_FDDI 0x0202
+#define PCI_CLASS_NETWORK_ATM 0x0203
+#define PCI_CLASS_NETWORK_OTHER 0x0280
+
+#define PCI_BASE_CLASS_DISPLAY 0x03
+#define PCI_CLASS_DISPLAY_VGA 0x0300
+#define PCI_CLASS_DISPLAY_XGA 0x0301
+#define PCI_CLASS_DISPLAY_3D 0x0302
+#define PCI_CLASS_DISPLAY_OTHER 0x0380
+
+#define PCI_BASE_CLASS_MULTIMEDIA 0x04
+#define PCI_CLASS_MULTIMEDIA_VIDEO 0x0400
+#define PCI_CLASS_MULTIMEDIA_AUDIO 0x0401
+#define PCI_CLASS_MULTIMEDIA_PHONE 0x0402
+#define PCI_CLASS_MULTIMEDIA_OTHER 0x0480
+
+#define PCI_BASE_CLASS_MEMORY 0x05
+#define PCI_CLASS_MEMORY_RAM 0x0500
+#define PCI_CLASS_MEMORY_FLASH 0x0501
+#define PCI_CLASS_MEMORY_OTHER 0x0580
+
+#define PCI_BASE_CLASS_BRIDGE 0x06
+#define PCI_CLASS_BRIDGE_HOST 0x0600
+#define PCI_CLASS_BRIDGE_ISA 0x0601
+#define PCI_CLASS_BRIDGE_EISA 0x0602
+#define PCI_CLASS_BRIDGE_MC 0x0603
+#define PCI_CLASS_BRIDGE_PCI 0x0604
+#define PCI_CLASS_BRIDGE_PCMCIA 0x0605
+#define PCI_CLASS_BRIDGE_NUBUS 0x0606
+#define PCI_CLASS_BRIDGE_CARDBUS 0x0607
+#define PCI_CLASS_BRIDGE_RACEWAY 0x0608
+#define PCI_CLASS_BRIDGE_OTHER 0x0680
+
+#define PCI_BASE_CLASS_COMMUNICATION 0x07
+#define PCI_CLASS_COMMUNICATION_SERIAL 0x0700
+#define PCI_CLASS_COMMUNICATION_PARALLEL 0x0701
+#define PCI_CLASS_COMMUNICATION_MULTISERIAL 0x0702
+#define PCI_CLASS_COMMUNICATION_MODEM 0x0703
+#define PCI_CLASS_COMMUNICATION_OTHER 0x0780
+
+#define PCI_BASE_CLASS_SYSTEM 0x08
+#define PCI_CLASS_SYSTEM_PIC 0x0800
+#define PCI_CLASS_SYSTEM_PIC_IOAPIC 0x080010
+#define PCI_CLASS_SYSTEM_PIC_IOXAPIC 0x080020
+#define PCI_CLASS_SYSTEM_DMA 0x0801
+#define PCI_CLASS_SYSTEM_TIMER 0x0802
+#define PCI_CLASS_SYSTEM_RTC 0x0803
+#define PCI_CLASS_SYSTEM_PCI_HOTPLUG 0x0804
+#define PCI_CLASS_SYSTEM_SDHCI 0x0805
+#define PCI_CLASS_SYSTEM_OTHER 0x0880
+
+#define PCI_BASE_CLASS_INPUT 0x09
+#define PCI_CLASS_INPUT_KEYBOARD 0x0900
+#define PCI_CLASS_INPUT_PEN 0x0901
+#define PCI_CLASS_INPUT_MOUSE 0x0902
+#define PCI_CLASS_INPUT_SCANNER 0x0903
+#define PCI_CLASS_INPUT_GAMEPORT 0x0904
+#define PCI_CLASS_INPUT_OTHER 0x0980
+
+#define PCI_BASE_CLASS_DOCKING 0x0a
+#define PCI_CLASS_DOCKING_GENERIC 0x0a00
+#define PCI_CLASS_DOCKING_OTHER 0x0a80
+
+#define PCI_BASE_CLASS_PROCESSOR 0x0b
+#define PCI_CLASS_PROCESSOR_386 0x0b00
+#define PCI_CLASS_PROCESSOR_486 0x0b01
+#define PCI_CLASS_PROCESSOR_PENTIUM 0x0b02
+#define PCI_CLASS_PROCESSOR_ALPHA 0x0b10
+#define PCI_CLASS_PROCESSOR_POWERPC 0x0b20
+#define PCI_CLASS_PROCESSOR_MIPS 0x0b30
+#define PCI_CLASS_PROCESSOR_CO 0x0b40
+
+#define PCI_BASE_CLASS_SERIAL 0x0c
+#define PCI_CLASS_SERIAL_FIREWIRE 0x0c00
+#define PCI_CLASS_SERIAL_FIREWIRE_OHCI 0x0c0010
+#define PCI_CLASS_SERIAL_ACCESS 0x0c01
+#define PCI_CLASS_SERIAL_SSA 0x0c02
+#define PCI_CLASS_SERIAL_USB 0x0c03
+#define PCI_CLASS_SERIAL_USB_UHCI 0x0c0300
+#define PCI_CLASS_SERIAL_USB_OHCI 0x0c0310
+#define PCI_CLASS_SERIAL_USB_EHCI 0x0c0320
+#define PCI_CLASS_SERIAL_USB_XHCI 0x0c0330
+#define PCI_CLASS_SERIAL_FIBER 0x0c04
+#define PCI_CLASS_SERIAL_SMBUS 0x0c05
+
+#define PCI_BASE_CLASS_WIRELESS 0x0d
+#define PCI_CLASS_WIRELESS_RF_CONTROLLER 0x0d10
+#define PCI_CLASS_WIRELESS_WHCI 0x0d1010
+
+#define PCI_BASE_CLASS_INTELLIGENT 0x0e
+#define PCI_CLASS_INTELLIGENT_I2O 0x0e00
+
+#define PCI_BASE_CLASS_SATELLITE 0x0f
+#define PCI_CLASS_SATELLITE_TV 0x0f00
+#define PCI_CLASS_SATELLITE_AUDIO 0x0f01
+#define PCI_CLASS_SATELLITE_VOICE 0x0f03
+#define PCI_CLASS_SATELLITE_DATA 0x0f04
+
+#define PCI_BASE_CLASS_CRYPT 0x10
+#define PCI_CLASS_CRYPT_NETWORK 0x1000
+#define PCI_CLASS_CRYPT_ENTERTAINMENT 0x1001
+#define PCI_CLASS_CRYPT_OTHER 0x1080
+
+#define PCI_BASE_CLASS_SIGNAL_PROCESSING 0x11
+#define PCI_CLASS_SP_DPIO 0x1100
+#define PCI_CLASS_SP_OTHER 0x1180
+
+#define PCI_CLASS_OTHERS 0xff
diff --git a/include/linux/pci_regs.h b/include/linux/pci_regs.h
new file mode 100644
index 0000000..9e11a0d
--- /dev/null
+++ b/include/linux/pci_regs.h
@@ -0,0 +1,118 @@
+/*
+ * pci_regs.h
+ *
+ * PCI standard defines
+ * Copyright 1994, Drew Eckhardt
+ * Copyright 1997--1999 Martin Mares <mj@ucw.cz>
+ *
+ * For more information, please consult the following manuals (look at
+ * http://www.pcisig.com/ for how to get them):
+ *
+ * PCI BIOS Specification
+ * PCI Local Bus Specification
+ * PCI to PCI Bridge Specification
+ * PCI System Design Guide
+ *
+ * For HyperTransport information, please consult the following manuals
+ * from http://www.hypertransport.org
+ *
+ * The HyperTransport I/O Link Specification
+ */
+
+#ifndef LINUX_PCI_REGS_H
+#define LINUX_PCI_REGS_H
+
+/*
+ * Under PCI, each device has 256 bytes of configuration address space,
+ * of which the first 64 bytes are standardized as follows:
+ */
+#define PCI_VENDOR_ID 0x00 /* 16 bits */
+#define PCI_DEVICE_ID 0x02 /* 16 bits */
+#define PCI_COMMAND 0x04 /* 16 bits */
+#define PCI_COMMAND_IO 0x1 /* Enable response in I/O space */
+#define PCI_COMMAND_MEMORY 0x2 /* Enable response in Memory space */
+#define PCI_COMMAND_MASTER 0x4 /* Enable bus mastering */
+#define PCI_COMMAND_SPECIAL 0x8 /* Enable response to special cycles */
+#define PCI_COMMAND_INVALIDATE 0x10 /* Use memory write and invalidate */
+#define PCI_COMMAND_VGA_PALETTE 0x20 /* Enable palette snooping */
+#define PCI_COMMAND_PARITY 0x40 /* Enable parity checking */
+#define PCI_COMMAND_WAIT 0x80 /* Enable address/data stepping */
+#define PCI_COMMAND_SERR 0x100 /* Enable SERR */
+#define PCI_COMMAND_FAST_BACK 0x200 /* Enable back-to-back writes */
+#define PCI_COMMAND_INTX_DISABLE 0x400 /* INTx Emulation Disable */
+
+#define PCI_STATUS 0x06 /* 16 bits */
+#define PCI_STATUS_INTERRUPT 0x08 /* Interrupt status */
+#define PCI_STATUS_CAP_LIST 0x10 /* Support Capability List */
+#define PCI_STATUS_66MHZ 0x20 /* Support 66 MHz PCI 2.1 bus */
+#define PCI_STATUS_UDF 0x40 /* Support User Definable Features [obsolete] */
+#define PCI_STATUS_FAST_BACK 0x80 /* Accept fast-back to back */
+#define PCI_STATUS_PARITY 0x100 /* Detected parity error */
+#define PCI_STATUS_DEVSEL_MASK 0x600 /* DEVSEL timing */
+#define PCI_STATUS_DEVSEL_FAST 0x000
+#define PCI_STATUS_DEVSEL_MEDIUM 0x200
+#define PCI_STATUS_DEVSEL_SLOW 0x400
+#define PCI_STATUS_SIG_TARGET_ABORT 0x800 /* Set on target abort */
+#define PCI_STATUS_REC_TARGET_ABORT 0x1000 /* Master ack of " */
+#define PCI_STATUS_REC_MASTER_ABORT 0x2000 /* Set on master abort */
+#define PCI_STATUS_SIG_SYSTEM_ERROR 0x4000 /* Set when we drive SERR */
+#define PCI_STATUS_DETECTED_PARITY 0x8000 /* Set on parity error */
+
+#define PCI_CLASS_REVISION 0x08 /* High 24 bits are class, low 8 revision */
+#define PCI_REVISION_ID 0x08 /* Revision ID */
+#define PCI_CLASS_PROG 0x09 /* Reg. Level Programming Interface */
+#define PCI_CLASS_DEVICE 0x0a /* Device class */
+
+#define PCI_CACHE_LINE_SIZE 0x0c /* 8 bits */
+#define PCI_LATENCY_TIMER 0x0d /* 8 bits */
+#define PCI_HEADER_TYPE 0x0e /* 8 bits */
+#define PCI_HEADER_TYPE_NORMAL 0
+#define PCI_HEADER_TYPE_BRIDGE 1
+#define PCI_HEADER_TYPE_CARDBUS 2
+
+#define PCI_BIST 0x0f /* 8 bits */
+#define PCI_BIST_CODE_MASK 0x0f /* Return result */
+#define PCI_BIST_START 0x40 /* 1 to start BIST, 2 secs or less */
+#define PCI_BIST_CAPABLE 0x80 /* 1 if BIST capable */
+
+/*
+ * Base addresses specify locations in memory or I/O space.
+ * Decoded size can be determined by writing a value of
+ * 0xffffffff to the register, and reading it back. Only
+ * 1 bits are decoded.
+ */
+#define PCI_BASE_ADDRESS_0 0x10 /* 32 bits */
+#define PCI_BASE_ADDRESS_1 0x14 /* 32 bits [htype 0,1 only] */
+#define PCI_BASE_ADDRESS_2 0x18 /* 32 bits [htype 0 only] */
+#define PCI_BASE_ADDRESS_3 0x1c /* 32 bits */
+#define PCI_BASE_ADDRESS_4 0x20 /* 32 bits */
+#define PCI_BASE_ADDRESS_5 0x24 /* 32 bits */
+#define PCI_BASE_ADDRESS_SPACE 0x01 /* 0 = memory, 1 = I/O */
+#define PCI_BASE_ADDRESS_SPACE_IO 0x01
+#define PCI_BASE_ADDRESS_SPACE_MEMORY 0x00
+#define PCI_BASE_ADDRESS_MEM_TYPE_MASK 0x06
+#define PCI_BASE_ADDRESS_MEM_TYPE_32 0x00 /* 32 bit address */
+#define PCI_BASE_ADDRESS_MEM_TYPE_1M 0x02 /* Below 1M [obsolete] */
+#define PCI_BASE_ADDRESS_MEM_TYPE_64 0x04 /* 64 bit address */
+#define PCI_BASE_ADDRESS_MEM_PREFETCH 0x08 /* prefetchable? */
+#define PCI_BASE_ADDRESS_MEM_MASK (~0x0fUL)
+#define PCI_BASE_ADDRESS_IO_MASK (~0x03UL)
+/* bit 1 is reserved if address_space = 1 */
+
+/* Header type 0 (normal devices) */
+#define PCI_CARDBUS_CIS 0x28
+#define PCI_SUBSYSTEM_VENDOR_ID 0x2c
+#define PCI_SUBSYSTEM_ID 0x2e
+#define PCI_ROM_ADDRESS 0x30 /* Bits 31..11 are address, 10..1 reserved */
+#define PCI_ROM_ADDRESS_ENABLE 0x01
+#define PCI_ROM_ADDRESS_MASK (~0x7ffUL)
+
+#define PCI_CAPABILITY_LIST 0x34 /* Offset of first capability list entry */
+
+/* 0x35-0x3b are reserved */
+#define PCI_INTERRUPT_LINE 0x3c /* 8 bits */
+#define PCI_INTERRUPT_PIN 0x3d /* 8 bits */
+#define PCI_MIN_GNT 0x3e /* 8 bits */
+#define PCI_MAX_LAT 0x3f /* 8 bits */
+
+#endif /* LINUX_PCI_REGS_H */
--
1.9.2
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^ permalink raw reply [flat|nested] 11+ messages in thread* Re: [RFC v3 1/5] PCI: initial commit
2014-06-25 22:32 ` [RFC v3 1/5] PCI: initial commit Antony Pavlov
@ 2014-06-30 10:18 ` Lucas Stach
2014-07-01 7:29 ` Clément Léger
0 siblings, 1 reply; 11+ messages in thread
From: Lucas Stach @ 2014-06-30 10:18 UTC (permalink / raw)
To: Antony Pavlov; +Cc: Clément Leger, barebox
Hi Antony,
nice to see a new revision of this PCI stuff. I've used v2 as a base for
my Tegra PCI hacking during our Techweek.
This revision looks really good and I think it removes most of the
issues I've stumbled across. Some comments below.
Regards,
Lucas
Am Donnerstag, den 26.06.2014, 02:32 +0400 schrieb Antony Pavlov:
> used shorten version of linux-2.6.39 pci_ids.h
>
> Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> ---
> drivers/Makefile | 1 +
> drivers/pci/Kconfig | 12 ++
> drivers/pci/Makefile | 8 ++
> drivers/pci/bus.c | 110 ++++++++++++++++
> drivers/pci/pci.c | 282 ++++++++++++++++++++++++++++++++++++++++
> include/linux/mod_devicetable.h | 20 +++
> include/linux/pci.h | 241 ++++++++++++++++++++++++++++++++++
> include/linux/pci_ids.h | 136 +++++++++++++++++++
> include/linux/pci_regs.h | 118 +++++++++++++++++
> 9 files changed, 928 insertions(+)
> create mode 100644 drivers/pci/Kconfig
> create mode 100644 drivers/pci/Makefile
> create mode 100644 drivers/pci/bus.c
> create mode 100644 drivers/pci/pci.c
> create mode 100644 include/linux/mod_devicetable.h
> create mode 100644 include/linux/pci.h
> create mode 100644 include/linux/pci_ids.h
> create mode 100644 include/linux/pci_regs.h
>
> diff --git a/drivers/Makefile b/drivers/Makefile
> index ef3604f..1990e86 100644
> --- a/drivers/Makefile
> +++ b/drivers/Makefile
> @@ -26,3 +26,4 @@ obj-y += pinctrl/
> obj-y += bus/
> obj-$(CONFIG_REGULATOR) += regulator/
> obj-$(CONFIG_RESET_CONTROLLER) += reset/
> +obj-$(CONFIG_PCI) += pci/
Can we please move the Kconfig options for this into drivers/Kconfig? I
know you did it similar to the kernel, but it just does not feel right
to have those into the board/arch Kconfig. PCI is just another bus like
USB and the symbol HW_HAS_PCI should be enough to decide if we show this
options or not.
> diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
> new file mode 100644
> index 0000000..88b8dfb
> --- /dev/null
> +++ b/drivers/pci/Kconfig
> @@ -0,0 +1,12 @@
> +#
> +# PCI configuration
> +#
> +config PCI_DEBUG
> + bool "PCI Debugging"
> + depends on PCI
> + help
> + Say Y here if you want the PCI core to produce a bunch of debug
> + messages to the system log. Select this if you are having a
> + problem with PCI support and want to see more of what is going on.
> +
> + When in doubt, say N.
> diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
> new file mode 100644
> index 0000000..c7d43c3
> --- /dev/null
> +++ b/drivers/pci/Makefile
> @@ -0,0 +1,8 @@
> +#
> +# Makefile for the PCI bus specific drivers.
> +#
> +obj-y += pci.o bus.o
> +
> +ccflags-$(CONFIG_PCI_DEBUG) := -DDEBUG
> +
> +CPPFLAGS += $(ccflags-y)
[...]
> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
> new file mode 100644
> index 0000000..9bee73f
> --- /dev/null
> +++ b/drivers/pci/pci.c
> @@ -0,0 +1,282 @@
> +#include <common.h>
> +#include <linux/pci.h>
> +
> +#ifdef DEBUG
> +#define DBG(x...) printk(x)
> +#else
> +#define DBG(x...)
> +#endif
> +
> +static struct pci_controller *hose_head, **hose_tail = &hose_head;
> +
> +struct pci_bus *pci_root;
> +
This should really be a list, like it is in the kernel now. With the
introduction of PCI host controller drivers we have the situation where
a system may have more than one PCI root bus.
> +static struct pci_bus *pci_alloc_bus(void)
> +{
> + struct pci_bus *b;
> +
> + b = kzalloc(sizeof(*b), GFP_KERNEL);
> + if (b) {
> + INIT_LIST_HEAD(&b->node);
> + INIT_LIST_HEAD(&b->children);
> + INIT_LIST_HEAD(&b->devices);
> + INIT_LIST_HEAD(&b->slots);
> + INIT_LIST_HEAD(&b->resources);
> + }
> + return b;
> +}
> +
> +void register_pci_controller(struct pci_controller *hose)
> +{
> + struct pci_bus *bus;
> +
> + *hose_tail = hose;
> + hose_tail = &hose->next;
> +
> + bus = pci_alloc_bus();
> + hose->bus = bus;
> + bus->ops = hose->pci_ops;
> + bus->resource[0] = hose->mem_resource;
> + bus->resource[1] = hose->io_resource;
> +
> + pci_scan_bus(bus);
> +
> + pci_root = bus;
> +
> + return;
> +}
> +
[...]
--
Pengutronix e.K. | Lucas Stach |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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^ permalink raw reply [flat|nested] 11+ messages in thread* Re: [RFC v3 1/5] PCI: initial commit
2014-06-30 10:18 ` Lucas Stach
@ 2014-07-01 7:29 ` Clément Léger
2014-07-01 7:48 ` Antony Pavlov
0 siblings, 1 reply; 11+ messages in thread
From: Clément Léger @ 2014-07-01 7:29 UTC (permalink / raw)
To: Lucas Stach, Antony Pavlov; +Cc: barebox
> +int
> +pci_read_config_byte(struct pci_dev *dev, u8 where, u8 *val)
> +{
> + return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
> +}
> +
> +int
> +pci_read_config_word(struct pci_dev *dev, u8 where, u16 *val)
> +{
> + return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
> +}
> +
> +int
> +pci_read_config_dword(struct pci_dev *dev, u8 where, u32 *val)
> +{
> + return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
> +}
> +
> +int
> +pci_write_config_byte(struct pci_dev *dev, u8 where, u8 val)
> +{
> + return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
> +}
> +
> +int
> +pci_write_config_word(struct pci_dev *dev, u8 where, u16 val)
> +{
> + return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
> +}
> +
> +int
> +pci_write_config_dword(struct pci_dev *dev, u8 where, u32 val)
> +{
> + return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
> +}
>
I would suggest replacing the "u8 where" (in pci_read/write_config and
others) by "int where" to allow future access to PCIe extended
configuration space (up to offset 0x1000).
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^ permalink raw reply [flat|nested] 11+ messages in thread* Re: [RFC v3 1/5] PCI: initial commit
2014-07-01 7:29 ` Clément Léger
@ 2014-07-01 7:48 ` Antony Pavlov
0 siblings, 0 replies; 11+ messages in thread
From: Antony Pavlov @ 2014-07-01 7:48 UTC (permalink / raw)
To: Clément Léger; +Cc: barebox
On Tue, 01 Jul 2014 09:29:23 +0200
Clément Léger <clement.leger@kalray.eu> wrote:
> > +int
> > +pci_read_config_byte(struct pci_dev *dev, u8 where, u8 *val)
> > +{
> > + return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
> > +}
> > +
> > +int
> > +pci_read_config_word(struct pci_dev *dev, u8 where, u16 *val)
> > +{
> > + return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
> > +}
> > +
> > +int
> > +pci_read_config_dword(struct pci_dev *dev, u8 where, u32 *val)
> > +{
> > + return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
> > +}
> > +
> > +int
> > +pci_write_config_byte(struct pci_dev *dev, u8 where, u8 val)
> > +{
> > + return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
> > +}
> > +
> > +int
> > +pci_write_config_word(struct pci_dev *dev, u8 where, u16 val)
> > +{
> > + return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
> > +}
> > +
> > +int
> > +pci_write_config_dword(struct pci_dev *dev, u8 where, u32 val)
> > +{
> > + return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
> > +}
> >
> I would suggest replacing the "u8 where" (in pci_read/write_config and
> others) by "int where" to allow future access to PCIe extended
> configuration space (up to offset 0x1000).
Already done in [RFC v4] patchseries!
--
Best regards,
Antony Pavlov
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http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 11+ messages in thread
* [RFC v3 2/5] commands: add 'lspci' command
2014-06-25 22:32 [RFC v3 0/5] barebox PCI support Antony Pavlov
2014-06-25 22:32 ` [RFC v3 1/5] PCI: initial commit Antony Pavlov
@ 2014-06-25 22:32 ` Antony Pavlov
2014-06-30 10:21 ` Lucas Stach
2014-06-25 22:32 ` [RFC v3 3/5] net: add RealTek RTL-8139 PCI Ethernet driver Antony Pavlov
` (2 subsequent siblings)
4 siblings, 1 reply; 11+ messages in thread
From: Antony Pavlov @ 2014-06-25 22:32 UTC (permalink / raw)
To: barebox; +Cc: Clément Leger
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
commands/Kconfig | 8 ++++++++
commands/Makefile | 1 +
commands/lspci.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 58 insertions(+)
create mode 100644 commands/lspci.c
diff --git a/commands/Kconfig b/commands/Kconfig
index eed6fbd..c98dbc5 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -207,6 +207,14 @@ config CMD_REGULATOR
the regulator command lists the currently registered regulators and
their current state.
+config CMD_LSPCI
+ bool
+ depends on PCI
+ prompt "lspci command"
+ default y
+ help
+ The lspci command allows to list all PCI devices.
+
config CMD_VERSION
tristate
default y
diff --git a/commands/Makefile b/commands/Makefile
index a84d333..d42aca5 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -99,3 +99,4 @@ obj-$(CONFIG_CMD_READF) += readf.o
obj-$(CONFIG_CMD_MENUTREE) += menutree.o
obj-$(CONFIG_CMD_2048) += 2048.o
obj-$(CONFIG_CMD_REGULATOR) += regulator.o
+obj-$(CONFIG_CMD_LSPCI) += lspci.o
diff --git a/commands/lspci.c b/commands/lspci.c
new file mode 100644
index 0000000..5e1f6dd
--- /dev/null
+++ b/commands/lspci.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2011-2014 Antony Pavlov <antonynpavlov@gmail.com>
+ *
+ * This file is part of barebox.
+ * See file CREDITS for list of people who contributed to this project.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ */
+
+#include <common.h>
+#include <command.h>
+#include <complete.h>
+#include <linux/pci.h>
+
+static int do_lspci(int argc, char *argv[])
+{
+ struct pci_dev *dev;
+
+ if (!pci_root) {
+ printf("no pci!\n");
+ return 1;
+ }
+
+ list_for_each_entry(dev, &pci_root->devices, bus_list) {
+ printf("%02x: %04x: %04x:%04x (rev %02x)\n",
+ dev->devfn,
+ (dev->class >> 8) & 0xffff,
+ dev->vendor,
+ dev->device,
+ dev->revision);
+ }
+
+ return 0;
+}
+
+BAREBOX_CMD_START(lspci)
+ .cmd = do_lspci,
+ BAREBOX_CMD_DESC("Show PCI info")
+ BAREBOX_CMD_GROUP(CMD_GRP_INFO)
+ BAREBOX_CMD_COMPLETE(empty_complete)
+BAREBOX_CMD_END
--
1.9.2
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^ permalink raw reply [flat|nested] 11+ messages in thread* Re: [RFC v3 2/5] commands: add 'lspci' command
2014-06-25 22:32 ` [RFC v3 2/5] commands: add 'lspci' command Antony Pavlov
@ 2014-06-30 10:21 ` Lucas Stach
2014-06-30 17:32 ` Antony Pavlov
0 siblings, 1 reply; 11+ messages in thread
From: Lucas Stach @ 2014-06-30 10:21 UTC (permalink / raw)
To: Antony Pavlov; +Cc: Clément Leger, barebox
Am Donnerstag, den 26.06.2014, 02:32 +0400 schrieb Antony Pavlov:
> Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
> ---
> commands/Kconfig | 8 ++++++++
> commands/Makefile | 1 +
> commands/lspci.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 58 insertions(+)
> create mode 100644 commands/lspci.c
>
[...]
> diff --git a/commands/lspci.c b/commands/lspci.c
> new file mode 100644
> index 0000000..5e1f6dd
> --- /dev/null
> +++ b/commands/lspci.c
> @@ -0,0 +1,49 @@
> +/*
> + * Copyright (C) 2011-2014 Antony Pavlov <antonynpavlov@gmail.com>
> + *
> + * This file is part of barebox.
> + * See file CREDITS for list of people who contributed to this project.
> + *
> + * 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.
> + *
> + * 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.
> + *
> + */
> +
> +#include <common.h>
> +#include <command.h>
> +#include <complete.h>
> +#include <linux/pci.h>
> +
> +static int do_lspci(int argc, char *argv[])
> +{
> + struct pci_dev *dev;
> +
> + if (!pci_root) {
> + printf("no pci!\n");
Please rephrase this to something like "No PCI root busses found".
> + return 1;
> + }
> +
> + list_for_each_entry(dev, &pci_root->devices, bus_list) {
> + printf("%02x: %04x: %04x:%04x (rev %02x)\n",
> + dev->devfn,
> + (dev->class >> 8) & 0xffff,
> + dev->vendor,
> + dev->device,
> + dev->revision);
> + }
> +
> + return 0;
> +}
> +
> +BAREBOX_CMD_START(lspci)
> + .cmd = do_lspci,
> + BAREBOX_CMD_DESC("Show PCI info")
> + BAREBOX_CMD_GROUP(CMD_GRP_INFO)
> + BAREBOX_CMD_COMPLETE(empty_complete)
> +BAREBOX_CMD_END
--
Pengutronix e.K. | Lucas Stach |
Industrial Linux Solutions | http://www.pengutronix.de/ |
_______________________________________________
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barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 11+ messages in thread* Re: [RFC v3 2/5] commands: add 'lspci' command
2014-06-30 10:21 ` Lucas Stach
@ 2014-06-30 17:32 ` Antony Pavlov
0 siblings, 0 replies; 11+ messages in thread
From: Antony Pavlov @ 2014-06-30 17:32 UTC (permalink / raw)
To: Lucas Stach; +Cc: Clément Leger, barebox
On Mon, 30 Jun 2014 12:21:50 +0200
Lucas Stach <l.stach@pengutronix.de> wrote:
> Am Donnerstag, den 26.06.2014, 02:32 +0400 schrieb Antony Pavlov:
> > Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
> > ---
> > commands/Kconfig | 8 ++++++++
> > commands/Makefile | 1 +
> > commands/lspci.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
> > 3 files changed, 58 insertions(+)
> > create mode 100644 commands/lspci.c
> >
>
> [...]
>
> > diff --git a/commands/lspci.c b/commands/lspci.c
> > new file mode 100644
> > index 0000000..5e1f6dd
> > --- /dev/null
> > +++ b/commands/lspci.c
> > @@ -0,0 +1,49 @@
> > +/*
> > + * Copyright (C) 2011-2014 Antony Pavlov <antonynpavlov@gmail.com>
> > + *
> > + * This file is part of barebox.
> > + * See file CREDITS for list of people who contributed to this project.
> > + *
> > + * 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.
> > + *
> > + * 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.
> > + *
> > + */
> > +
> > +#include <common.h>
> > +#include <command.h>
> > +#include <complete.h>
> > +#include <linux/pci.h>
> > +
> > +static int do_lspci(int argc, char *argv[])
> > +{
> > + struct pci_dev *dev;
> > +
> > + if (!pci_root) {
> > + printf("no pci!\n");
>
> Please rephrase this to something like "No PCI root busses found".
Thanks for this remark!
I prefer the "No PCI bus detected" message from linux-2.0.0 :)
> > + return 1;
> > + }
> > +
> > + list_for_each_entry(dev, &pci_root->devices, bus_list) {
> > + printf("%02x: %04x: %04x:%04x (rev %02x)\n",
> > + dev->devfn,
> > + (dev->class >> 8) & 0xffff,
> > + dev->vendor,
> > + dev->device,
> > + dev->revision);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +BAREBOX_CMD_START(lspci)
> > + .cmd = do_lspci,
> > + BAREBOX_CMD_DESC("Show PCI info")
> > + BAREBOX_CMD_GROUP(CMD_GRP_INFO)
> > + BAREBOX_CMD_COMPLETE(empty_complete)
> > +BAREBOX_CMD_END
>
> --
> Pengutronix e.K. | Lucas Stach |
> Industrial Linux Solutions | http://www.pengutronix.de/ |
>
--
--
Best regards,
Antony Pavlov
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 11+ messages in thread
* [RFC v3 3/5] net: add RealTek RTL-8139 PCI Ethernet driver
2014-06-25 22:32 [RFC v3 0/5] barebox PCI support Antony Pavlov
2014-06-25 22:32 ` [RFC v3 1/5] PCI: initial commit Antony Pavlov
2014-06-25 22:32 ` [RFC v3 2/5] commands: add 'lspci' command Antony Pavlov
@ 2014-06-25 22:32 ` Antony Pavlov
2014-06-25 22:32 ` [RFC v3 4/5] MIPS: add PCI support for GT64120-based Malta board Antony Pavlov
2014-06-25 22:32 ` [RFC v3 5/5] MIPS: qemu-malta_defconfig: enable PCI & network stuff Antony Pavlov
4 siblings, 0 replies; 11+ messages in thread
From: Antony Pavlov @ 2014-06-25 22:32 UTC (permalink / raw)
To: barebox; +Cc: Clément Leger
This driver is based on Linux 2.6.39 8139too driver.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
drivers/net/Kconfig | 8 +
drivers/net/Makefile | 1 +
drivers/net/rtl8139.c | 621 ++++++++++++++++++++++++++++++++++++++++++++++++
include/linux/pci_ids.h | 5 +
4 files changed, 635 insertions(+)
create mode 100644 drivers/net/rtl8139.c
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 7a0d5e1..975c927 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -130,6 +130,14 @@ config DRIVER_NET_ORION
select PHYLIB
select MDIO_MVEBU
+config DRIVER_NET_RTL8139
+ bool "RealTek RTL-8139 PCI Ethernet driver"
+ depends on PCI
+ select PHYLIB
+ help
+ This is a driver for the Fast Ethernet PCI network cards based on
+ the RTL 8139 chips.
+
config DRIVER_NET_SMC911X
bool "smc911x ethernet driver"
select PHYLIB
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 65f0d8b..d907061 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_DRIVER_NET_MICREL) += ksz8864rmn.o
obj-$(CONFIG_DRIVER_NET_MPC5200) += fec_mpc5200.o
obj-$(CONFIG_DRIVER_NET_NETX) += netx_eth.o
obj-$(CONFIG_DRIVER_NET_ORION) += orion-gbe.o
+obj-$(CONFIG_DRIVER_NET_RTL8139) += rtl8139.o
obj-$(CONFIG_DRIVER_NET_SMC911X) += smc911x.o
obj-$(CONFIG_DRIVER_NET_SMC91111) += smc91111.o
obj-$(CONFIG_DRIVER_NET_TAP) += tap.o
diff --git a/drivers/net/rtl8139.c b/drivers/net/rtl8139.c
new file mode 100644
index 0000000..e5d1291
--- /dev/null
+++ b/drivers/net/rtl8139.c
@@ -0,0 +1,621 @@
+#include <common.h>
+#include <net.h>
+#include <malloc.h>
+#include <init.h>
+#include <xfuncs.h>
+#include <errno.h>
+#include <io.h>
+#include <linux/phy.h>
+#include <linux/pci.h>
+
+#define RTL8139_DEBUG
+#undef RTL8139_DEBUG
+
+/*
+ * Receive ring size
+ * Warning: 64K ring has hardware issues and may lock up.
+ */
+#define RX_BUF_IDX 0 /* 8K ring */
+#define RX_BUF_LEN (8192 << RX_BUF_IDX)
+#define RX_BUF_PAD 16
+#define RX_BUF_WRAP_PAD 2048 /* spare padding to handle lack of packet wrap */
+
+#if RX_BUF_LEN == 65536
+#define RX_BUF_TOT_LEN RX_BUF_LEN
+#else
+#define RX_BUF_TOT_LEN (RX_BUF_LEN + RX_BUF_PAD + RX_BUF_WRAP_PAD)
+#endif
+
+/* Number of Tx descriptor registers. */
+#define NUM_TX_DESC 4
+
+/* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/
+#define MAX_ETH_FRAME_SIZE 1536
+
+/* Size of the Tx bounce buffers -- must be at least (dev->mtu+14+4). */
+#define TX_BUF_SIZE MAX_ETH_FRAME_SIZE
+#define TX_BUF_TOT_LEN (TX_BUF_SIZE * NUM_TX_DESC)
+
+/* PCI Tuning Parameters
+ Threshold is bytes transferred to chip before transmission starts. */
+#define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */
+
+/* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */
+#define RX_FIFO_THRESH 7 /* Rx buffer level before first PCI xfer. */
+#define RX_DMA_BURST 7 /* Maximum PCI burst, '6' is 1024 */
+#define TX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
+#define TX_RETRY 8 /* 0-15. retries = 16 + (TX_RETRY * 16) */
+
+struct rtl8139_priv {
+ struct eth_device edev;
+ void __iomem *base;
+ struct pci_dev *pci_dev;
+ unsigned char *rx_ring;
+ unsigned int cur_rx; /* RX buf index of next pkt */
+ dma_addr_t rx_ring_dma;
+
+ u32 rx_config;
+ unsigned int tx_flag;
+ unsigned long cur_tx;
+ unsigned long dirty_tx;
+ unsigned char *tx_buf[NUM_TX_DESC]; /* Tx bounce buffers */
+ unsigned char *tx_bufs; /* Tx bounce buffer region. */
+ dma_addr_t tx_bufs_dma;
+
+ struct mii_bus miibus;
+};
+
+#define ETH_ZLEN 60 /* Min. octets in frame sans FCS */
+
+/* Registers */
+#define MAC0 0x00
+#define MAR0 0x08
+#define TxStatus0 0x10
+
+enum TxStatusBits {
+ TxHostOwns = 0x2000,
+ TxUnderrun = 0x4000,
+ TxStatOK = 0x8000,
+ TxOutOfWindow = 0x20000000,
+ TxAborted = 0x40000000,
+ TxCarrierLost = 0x80000000,
+};
+
+#define TxAddr0 0x20
+#define RxBuf 0x30
+#define ChipCmd 0x37
+#define CmdReset 0x10
+#define CmdRxEnb 0x08
+#define CmdTxEnb 0x04
+#define RxBufEmpty 0x01
+#define RxBufPtr 0x38
+#define RxBufAddr 0x3A
+#define IntrMask 0x3C
+#define IntrStatus 0x3E
+#define PCIErr 0x8000
+#define PCSTimeout 0x4000
+#define RxFIFOOver 0x0040
+#define RxUnderrun 0x0020
+#define RxOverflow 0x0010
+#define TxErr 0x0008
+#define TxOK 0x0004
+#define RxErr 0x0002
+#define RxOK 0x0001
+#define RxAckBits (RxFIFOOver | RxOverflow | RxOK)
+
+#define TxConfig 0x40
+/* Bits in TxConfig. */
+enum tx_config_bits {
+ /* Interframe Gap Time. Only TxIFG96 doesn't violate IEEE 802.3 */
+ TxIFGShift = 24,
+ TxIFG84 = (0 << TxIFGShift), /* 8.4us / 840ns (10 / 100Mbps) */
+ TxIFG88 = (1 << TxIFGShift), /* 8.8us / 880ns (10 / 100Mbps) */
+ TxIFG92 = (2 << TxIFGShift), /* 9.2us / 920ns (10 / 100Mbps) */
+ TxIFG96 = (3 << TxIFGShift), /* 9.6us / 960ns (10 / 100Mbps) */
+
+ TxLoopBack = (1 << 18) | (1 << 17), /* enable loopback test mode */
+ TxCRC = (1 << 16), /* DISABLE Tx pkt CRC append */
+ TxClearAbt = (1 << 0), /* Clear abort (WO) */
+ TxDMAShift = 8, /* DMA burst value (0-7) is shifted X many bits */
+ TxRetryShift = 4, /* TXRR value (0-15) is shifted X many bits */
+
+ TxVersionMask = 0x7C800000, /* mask out version bits 30-26, 23 */
+};
+
+#define RxConfig 0x44
+ /* rx fifo threshold */
+#define RxCfgFIFOShift 13
+#define RxCfgFIFONone (7 << RxCfgFIFOShift)
+ /* Max DMA burst */
+#define RxCfgDMAShift 8
+#define RxCfgDMAUnlimited (7 << RxCfgDMAShift)
+ /* rx ring buffer length */
+#define RxCfgRcv8K 0
+#define RxCfgRcv16K (1 << 11)
+#define RxCfgRcv32K (1 << 12)
+#define RxCfgRcv64K ((1 << 11) | (1 << 12))
+ /* Disable packet wrap at end of Rx buffer. (not possible with 64k) */
+#define RxNoWrap (1 << 7)
+#define AcceptErr 0x20
+#define AcceptRunt 0x10
+#define AcceptBroadcast 0x08
+#define AcceptMulticast 0x04
+#define AcceptMyPhys 0x02
+#define AcceptAllPhys 0x01
+
+#define RxMissed 0x4C
+#define Cfg9346 0x50
+#define Cfg9346_Lock 0x00
+#define Cfg9346_Unlock 0xC0
+#define BasicModeCtrl 0x62
+#define BasicModeStatus 0x64
+#define NWayAdvert 0x66
+#define NWayLPAR 0x68
+#define NWayExpansion 0x6a
+
+static const char mii_2_8139_map[8] = {
+ BasicModeCtrl,
+ BasicModeStatus,
+ 0,
+ 0,
+ NWayAdvert,
+ NWayLPAR,
+ NWayExpansion,
+ 0
+};
+
+/* write MMIO register */
+#define RTL_W8(priv, reg, val) writeb(val, ((char *)(priv->base) + reg))
+#define RTL_W16(priv, reg, val) writew(val, ((char *)(priv->base) + reg))
+#define RTL_W32(priv, reg, val) writel(val, ((char *)(priv->base) + reg))
+
+/* read MMIO register */
+#define RTL_R8(priv, reg) readb(((char *)(priv->base) + reg))
+#define RTL_R16(priv, reg) readw(((char *)(priv->base) + reg))
+#define RTL_R32(priv, reg) readl(((char *)(priv->base) + reg))
+
+/* write MMIO register, with flush */
+/* Flush avoids rtl8139 bug w/ posted MMIO writes */
+static inline void RTL_W8_F(struct rtl8139_priv *priv, int reg, int val)
+{
+ RTL_W8(priv, reg, val);
+ RTL_R8(priv, reg);
+}
+
+static inline void RTL_W16_F(struct rtl8139_priv *priv, int reg, int val)
+{
+ RTL_W16(priv, reg, val);
+ RTL_R16(priv, reg);
+}
+
+static inline void RTL_W32_F(struct rtl8139_priv *priv, int reg, int val)
+{
+ RTL_W32(priv, reg, val);
+ RTL_R32(priv, reg);
+}
+
+static const unsigned int rtl8139_rx_config =
+ RxCfgRcv8K | RxNoWrap |
+ (RX_FIFO_THRESH << RxCfgFIFOShift) |
+ (RX_DMA_BURST << RxCfgDMAShift);
+
+static const unsigned int rtl8139_tx_config =
+ TxIFG96 | (TX_DMA_BURST << TxDMAShift) | (TX_RETRY << TxRetryShift);
+
+static void rtl8139_chip_reset(struct rtl8139_priv *priv)
+{
+ int i;
+
+ /* Soft reset the chip. */
+ RTL_W8(priv, ChipCmd, CmdReset);
+
+ /* Check that the chip has finished the reset. */
+ for (i = 1000; i > 0; i--) {
+ if ((RTL_R8(priv, ChipCmd) & CmdReset) == 0)
+ break;
+ udelay(10);
+ }
+}
+
+static void __set_rx_mode(struct rtl8139_priv *priv)
+{
+ u32 mc_filter[2]; /* Multicast hash filter */
+ int rx_mode;
+ u32 tmp;
+
+ rx_mode =
+ AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
+ AcceptAllPhys;
+ mc_filter[1] = mc_filter[0] = 0xffffffff;
+
+ /* We can safely update without stopping the chip. */
+ tmp = rtl8139_rx_config | rx_mode;
+ if (priv->rx_config != tmp) {
+ RTL_W32_F(priv, RxConfig, tmp);
+ priv->rx_config = tmp;
+ }
+
+ RTL_W32_F(priv, MAR0 + 0, mc_filter[0]);
+ RTL_W32_F(priv, MAR0 + 4, mc_filter[1]);
+}
+
+/* Start the hardware at open or resume. */
+static void rtl8139_hw_start(struct rtl8139_priv *priv)
+{
+ u32 i;
+ u8 tmp;
+
+ rtl8139_chip_reset(priv);
+
+ /* unlock Config[01234] and BMCR register writes */
+ RTL_W8_F(priv, Cfg9346, Cfg9346_Unlock);
+
+ /* FIXME */
+#if 0
+ /* Restore our idea of the MAC address. */
+ RTL_W32_F(priv, MAC0 + 0, *(__le32 *) (dev->dev_addr + 0));
+ RTL_W32_F(priv, MAC0 + 4, *(__le16 *) (dev->dev_addr + 4));
+#endif
+
+ priv->cur_rx = 0;
+
+ /* init Rx ring buffer DMA address */
+ RTL_W32_F(priv, RxBuf, priv->rx_ring_dma);
+
+ /* Must enable Tx/Rx before setting transfer thresholds! */
+ RTL_W8(priv, ChipCmd, CmdRxEnb | CmdTxEnb);
+
+ priv->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
+ RTL_W32(priv, RxConfig, priv->rx_config);
+ RTL_W32(priv, TxConfig, rtl8139_tx_config);
+
+ /* Lock Config[01234] and BMCR register writes */
+ RTL_W8(priv, Cfg9346, Cfg9346_Lock);
+
+ /* init Tx buffer DMA addresses */
+ for (i = 0; i < NUM_TX_DESC; i++)
+ RTL_W32_F(priv, TxAddr0 + (i * 4), priv->tx_bufs_dma + (priv->tx_buf[i] - priv->tx_bufs));
+
+ RTL_W32(priv, RxMissed, 0);
+
+ __set_rx_mode(priv);
+
+ /* Disable interrupts by clearing the interrupt mask. */
+ RTL_W16(priv, IntrMask, 0);
+
+ /* make sure RxTx has started */
+ tmp = RTL_R8(priv, ChipCmd);
+ if ((!(tmp & CmdRxEnb)) || (!(tmp & CmdTxEnb)))
+ RTL_W8(priv, ChipCmd, CmdRxEnb | CmdTxEnb);
+}
+
+static inline void rtl8139_tx_clear(struct rtl8139_priv *priv)
+{
+ priv->cur_tx = 0;
+ priv->dirty_tx = 0;
+
+ /* XXX account for unsent Tx packets in tp->stats.tx_dropped */
+}
+
+/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
+static void rtl8139_init_ring(struct rtl8139_priv *priv)
+{
+ int i;
+
+ priv->cur_rx = 0;
+ priv->cur_tx = 0;
+ priv->dirty_tx = 0;
+
+ for (i = 0; i < NUM_TX_DESC; i++)
+ priv->tx_buf[i] = &priv->tx_bufs[i * TX_BUF_SIZE];
+}
+
+static int rtl8139_phy_read(struct mii_bus *bus, int phy_addr, int reg)
+{
+ struct rtl8139_priv *priv = bus->priv;
+ int val;
+
+ val = 0xffff;
+
+ if (phy_addr == 0) { /* Really a 8139. Use internal registers. */
+ val = reg < 8 && mii_2_8139_map[reg] ?
+ RTL_R16(priv, mii_2_8139_map[reg]) : 0;
+ }
+
+ return val;
+}
+
+static int rtl8139_phy_write(struct mii_bus *bus, int phy_addr,
+ int reg, u16 val)
+{
+ struct rtl8139_priv *priv = bus->priv;
+
+ if (phy_addr == 0) { /* Really a 8139. Use internal registers. */
+ if (reg == 0) {
+ RTL_W8(priv, Cfg9346, Cfg9346_Unlock);
+ RTL_W16(priv, BasicModeCtrl, val);
+ RTL_W8(priv, Cfg9346, Cfg9346_Lock);
+ } else if (reg < 8 && mii_2_8139_map[reg]) {
+ RTL_W16(priv, mii_2_8139_map[reg], val);
+ }
+ }
+
+ return 0;
+}
+
+static int rtl8139_get_ethaddr(struct eth_device *edev, unsigned char *m)
+{
+ struct rtl8139_priv *priv = edev->priv;
+ int i;
+
+ for (i = 0; i < 6; i++) {
+ m[i] = RTL_R8(priv, (MAC0 + i));
+ }
+
+ return 0;
+}
+
+static int rtl8139_set_ethaddr(struct eth_device *edev,
+ unsigned char *mac_addr)
+{
+ struct rtl8139_priv *priv = edev->priv;
+ int i;
+
+ RTL_W8(priv, Cfg9346, Cfg9346_Unlock);
+
+ for (i = 0; i < 6; i++) {
+ RTL_W8(priv, (MAC0 + i), mac_addr[i]);
+ RTL_R8(priv, mac_addr[i]);
+ }
+
+ RTL_W8(priv, Cfg9346, Cfg9346_Lock);
+
+ return 0;
+}
+
+static int rtl8139_init_dev(struct eth_device *edev)
+{
+ struct rtl8139_priv *priv = edev->priv;
+
+ rtl8139_chip_reset(priv);
+
+ return 0;
+}
+
+static int rtl8139_eth_open(struct eth_device *edev)
+{
+ struct rtl8139_priv *priv = edev->priv;
+ int ret;
+
+ /* HACK: FIXME: use dma_alloc_coherent() */
+ priv->tx_bufs = (unsigned char *)0xa1000000;
+ priv->tx_bufs_dma = (dma_addr_t)0x01000000;
+
+ priv->rx_ring = (unsigned char *)0xa2000000;
+ priv->rx_ring_dma = (dma_addr_t)0x02000000;
+
+ priv->tx_flag = (TX_FIFO_THRESH << 11) & 0x003f0000;
+
+ rtl8139_init_ring(priv);
+ rtl8139_hw_start(priv);
+
+ ret = phy_device_connect(edev, &priv->miibus, 0, NULL, 0,
+ PHY_INTERFACE_MODE_NA);
+
+ return ret;
+}
+
+static void rtl8139_eth_halt(struct eth_device *edev)
+{
+ struct rtl8139_priv *priv = edev->priv;
+
+ /* Stop the chip's Tx and Rx DMA processes. */
+ RTL_W8(priv, ChipCmd, 0);
+
+ /* Disable interrupts by clearing the interrupt mask. */
+ RTL_W16(priv, IntrMask, 0);
+
+ /* Green! Put the chip in low-power mode. */
+ RTL_W8(priv, Cfg9346, Cfg9346_Unlock);
+}
+
+static void rtl8139_tx_interrupt(struct rtl8139_priv *priv)
+{
+ unsigned long dirty_tx, tx_left;
+
+ dirty_tx = priv->dirty_tx;
+ tx_left = priv->cur_tx - dirty_tx;
+ while (tx_left > 0) {
+ int entry = dirty_tx % NUM_TX_DESC;
+ int txstatus;
+
+ txstatus = RTL_R32(priv, TxStatus0 + (entry * sizeof(u32)));
+
+ if (!(txstatus & (TxStatOK | TxUnderrun | TxAborted)))
+ break; /* It still hasn't been Txed */
+
+ /* Note: TxCarrierLost is always asserted at 100mbps. */
+ if (txstatus & (TxOutOfWindow | TxAborted)) {
+ /* There was an major error, log it. */
+ printk("Transmit error, Tx status %08x\n", txstatus);
+ if (txstatus & TxAborted) {
+ RTL_W32(priv, TxConfig, TxClearAbt);
+ RTL_W16(priv, IntrStatus, TxErr);
+ }
+ } else {
+ if (txstatus & TxUnderrun) {
+ /* Add 64 to the Tx FIFO threshold. */
+ if (priv->tx_flag < 0x00300000)
+ priv->tx_flag += 0x00020000;
+ }
+ }
+
+ dirty_tx++;
+ tx_left--;
+ }
+
+ if (priv->dirty_tx != dirty_tx) {
+ priv->dirty_tx = dirty_tx;
+ }
+}
+
+static int rtl8139_eth_send(struct eth_device *edev, void *packet,
+ int packet_length)
+{
+ struct rtl8139_priv *priv = edev->priv;
+
+ unsigned int entry;
+
+ rtl8139_tx_interrupt(priv);
+
+ /* Calculate the next Tx descriptor entry. */
+ entry = priv->cur_tx % NUM_TX_DESC;
+
+ /* Note: the chip doesn't have auto-pad! */
+ if (likely(packet_length < TX_BUF_SIZE)) {
+ if (packet_length < ETH_ZLEN)
+ memset(priv->tx_buf[entry], 0, ETH_ZLEN);
+ memcpy(priv->tx_buf[entry], packet, packet_length);
+ } else {
+ printk("packet too long\n");
+ return 0;
+ }
+
+ /*
+ * Writing to TxStatus triggers a DMA transfer of the data
+ * copied to tp->tx_buf[entry] above.
+ */
+ if (packet_length < ETH_ZLEN) {
+ packet_length = ETH_ZLEN;
+ }
+ RTL_W32_F(priv, (TxStatus0 + (entry * sizeof(u32))),
+ (priv->tx_flag | packet_length));
+
+ priv->cur_tx++;
+
+ return 0;
+}
+
+static const u16 rtl8139_intr_mask =
+ PCIErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver |
+ TxErr | TxOK | RxErr | RxOK;
+
+static int rtl8139_eth_rx(struct eth_device *edev)
+{
+ struct rtl8139_priv *priv = edev->priv;
+ unsigned char *rx_ring = priv->rx_ring;
+ unsigned int cur_rx = priv->cur_rx;
+ unsigned int rx_size = 0;
+
+ u32 ring_offset = cur_rx % RX_BUF_LEN;
+ u32 rx_status;
+ unsigned int pkt_size;
+
+ rtl8139_tx_interrupt(priv);
+
+ if (RTL_R8(priv, ChipCmd) & RxBufEmpty) {
+ /* no data */
+ return 0;
+ }
+
+ rx_status = le32_to_cpu(*(__le32 *) (rx_ring + ring_offset));
+ rx_size = rx_status >> 16;
+ pkt_size = rx_size - 4;
+
+ net_receive(edev, &rx_ring[ring_offset + 4], pkt_size);
+
+ cur_rx = (cur_rx + rx_size + 4 + 3) & ~3;
+ cur_rx = cur_rx & (RX_BUF_LEN - 1); /* FIXME */
+ RTL_W16(priv, RxBufPtr, (u16) (cur_rx - 16));
+
+ priv->cur_rx = cur_rx;
+
+ return pkt_size /* size */;
+}
+
+static int rtl8139_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct eth_device *edev;
+ struct rtl8139_priv *priv;
+ int ret;
+ u32 bar;
+ struct pci_bus *bus = pdev->bus;
+ struct device_d *dev = &pdev->dev;
+
+ /* enable pci device */
+ /* FIXME: use pci_set_master(pdev); */
+ pci_read_config_dword(pdev, PCI_COMMAND, &bar);
+ pci_write_config_dword(pdev, PCI_COMMAND, bar
+ | PCI_COMMAND_IO
+ | PCI_COMMAND_MEMORY
+ | PCI_COMMAND_MASTER);
+
+ priv = xzalloc(sizeof(struct rtl8139_priv));
+
+ edev = &priv->edev;
+ dev->type_data = edev;
+ edev->priv = priv;
+
+ priv->pci_dev = pdev;
+
+ priv->miibus.read = rtl8139_phy_read;
+ priv->miibus.write = rtl8139_phy_write;
+ priv->miibus.priv = priv;
+ priv->miibus.parent = &edev->dev;
+
+ /* FIXME: pci_resource_start() */
+ pci_read_config_dword(pdev, PCI_BASE_ADDRESS_1, &bar);
+
+ /* FIXME: use pci_iomap() */
+ priv->base = (void *)bus->ops->res_start(bus, bar);
+
+ printk("found rtl8139 (rev %02x) at %02x: %04x (base=%p)\n",
+ pdev->revision,
+ pdev->devfn,
+ (pdev->class >> 8) & 0xffff,
+ priv->base);
+
+ edev->init = rtl8139_init_dev;
+ edev->open = rtl8139_eth_open;
+ edev->send = rtl8139_eth_send;
+ edev->recv = rtl8139_eth_rx;
+ edev->get_ethaddr = rtl8139_get_ethaddr;
+ edev->set_ethaddr = rtl8139_set_ethaddr;
+ edev->halt = rtl8139_eth_halt;
+ edev->parent = dev;
+
+ ret = eth_register(edev);
+ if (ret)
+ goto eth_err;
+
+ ret = mdiobus_register(&priv->miibus);
+ if (ret)
+ goto mdio_err;
+
+ return 0;
+
+mdio_err:
+ eth_unregister(edev);
+
+eth_err:
+ free(priv);
+
+ return ret;
+}
+
+static DEFINE_PCI_DEVICE_TABLE(rtl8139_pci_tbl) = {
+ { PCI_DEVICE(PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139), },
+ { },
+};
+
+static struct pci_driver rtl8139_eth_driver = {
+ .name = "rtl8139_eth",
+ .id_table = rtl8139_pci_tbl,
+ .probe = rtl8139_probe,
+};
+
+static int rtl8139_init(void)
+{
+ return pci_register_driver(&rtl8139_eth_driver);
+}
+device_initcall(rtl8139_init);
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 49e2954..17ac7fd 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -134,3 +134,8 @@
#define PCI_CLASS_SP_OTHER 0x1180
#define PCI_CLASS_OTHERS 0xff
+
+/* Vendors and devices. Sort key: vendor first, device next. */
+
+#define PCI_VENDOR_ID_REALTEK 0x10ec
+#define PCI_DEVICE_ID_REALTEK_8139 0x8139
--
1.9.2
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^ permalink raw reply [flat|nested] 11+ messages in thread* [RFC v3 4/5] MIPS: add PCI support for GT64120-based Malta board
2014-06-25 22:32 [RFC v3 0/5] barebox PCI support Antony Pavlov
` (2 preceding siblings ...)
2014-06-25 22:32 ` [RFC v3 3/5] net: add RealTek RTL-8139 PCI Ethernet driver Antony Pavlov
@ 2014-06-25 22:32 ` Antony Pavlov
2014-06-25 22:32 ` [RFC v3 5/5] MIPS: qemu-malta_defconfig: enable PCI & network stuff Antony Pavlov
4 siblings, 0 replies; 11+ messages in thread
From: Antony Pavlov @ 2014-06-25 22:32 UTC (permalink / raw)
To: barebox; +Cc: Clément Leger
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
arch/mips/Kconfig | 22 ++
arch/mips/include/asm/gt64120.h | 53 +++++
arch/mips/mach-malta/Makefile | 1 +
arch/mips/mach-malta/include/mach/mach-gt64120.h | 2 +
arch/mips/mach-malta/pci.c | 246 +++++++++++++++++++++++
5 files changed, 324 insertions(+)
create mode 100644 arch/mips/mach-malta/pci.c
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index f6b9765..603ce6e 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -45,6 +45,7 @@ config MACH_MIPS_MALTA
select SYS_SUPPORTS_BIG_ENDIAN
select HAS_DEBUG_LL
select GPIOLIB
+ select HW_HAS_PCI
config MACH_MIPS_AR231X
bool "Atheros ar231x-based boards"
@@ -330,6 +331,27 @@ config NMON_HELP
endmenu
+menu "Bus options (PCI)"
+
+config HW_HAS_PCI
+ bool
+
+config PCI
+ bool "Support for PCI controller"
+ depends on HW_HAS_PCI
+ select PCI_DOMAINS
+ help
+ Find out whether you have a PCI motherboard. PCI is the name of a
+ bus system, i.e. the way the CPU talks to the other stuff inside
+ your box. If you have PCI, say Y, otherwise N.
+
+config PCI_DOMAINS
+ bool
+
+source "drivers/pci/Kconfig"
+
+endmenu
+
source common/Kconfig
source commands/Kconfig
source net/Kconfig
diff --git a/arch/mips/include/asm/gt64120.h b/arch/mips/include/asm/gt64120.h
index 6b2ad0f..7e783c8 100644
--- a/arch/mips/include/asm/gt64120.h
+++ b/arch/mips/include/asm/gt64120.h
@@ -18,6 +18,8 @@
#ifndef _ASM_GT64120_H
#define _ASM_GT64120_H
+#define MSK(n) ((1 << (n)) - 1)
+
#define GT_DEF_BASE 0x14000000
/*
@@ -34,4 +36,55 @@
#define GT_PCI0M1LD_OFS 0x080
#define GT_PCI0M1HD_OFS 0x088
+#define GT_PCI0IOREMAP_OFS 0x0f0
+#define GT_PCI0M0REMAP_OFS 0x0f8
+#define GT_PCI0M1REMAP_OFS 0x100
+
+/* Interrupts. */
+#define GT_INTRCAUSE_OFS 0xc18
+
+/* PCI Internal. */
+#define GT_PCI0_CMD_OFS 0xc00
+#define GT_PCI0_CFGADDR_OFS 0xcf8
+#define GT_PCI0_CFGDATA_OFS 0xcfc
+
+#define GT_PCI_DCRM_SHF 21
+#define GT_PCI_LD_SHF 0
+#define GT_PCI_LD_MSK (MSK(15) << GT_PCI_LD_SHF)
+#define GT_PCI_HD_SHF 0
+#define GT_PCI_HD_MSK (MSK(7) << GT_PCI_HD_SHF)
+#define GT_PCI_REMAP_SHF 0
+#define GT_PCI_REMAP_MSK (MSK(11) << GT_PCI_REMAP_SHF)
+
+#define GT_INTRCAUSE_MASABORT0_SHF 18
+#define GT_INTRCAUSE_MASABORT0_MSK (MSK(1) << GT_INTRCAUSE_MASABORT0_SHF)
+#define GT_INTRCAUSE_MASABORT0_BIT GT_INTRCAUSE_MASABORT0_MSK
+
+#define GT_INTRCAUSE_TARABORT0_SHF 19
+#define GT_INTRCAUSE_TARABORT0_MSK (MSK(1) << GT_INTRCAUSE_TARABORT0_SHF)
+#define GT_INTRCAUSE_TARABORT0_BIT GT_INTRCAUSE_TARABORT0_MSK
+
+#define GT_PCI0_CFGADDR_REGNUM_SHF 2
+#define GT_PCI0_CFGADDR_REGNUM_MSK (MSK(6) << GT_PCI0_CFGADDR_REGNUM_SHF)
+#define GT_PCI0_CFGADDR_FUNCTNUM_SHF 8
+#define GT_PCI0_CFGADDR_FUNCTNUM_MSK (MSK(3) << GT_PCI0_CFGADDR_FUNCTNUM_SHF)
+#define GT_PCI0_CFGADDR_DEVNUM_SHF 11
+#define GT_PCI0_CFGADDR_DEVNUM_MSK (MSK(5) << GT_PCI0_CFGADDR_DEVNUM_SHF)
+#define GT_PCI0_CFGADDR_BUSNUM_SHF 16
+#define GT_PCI0_CFGADDR_BUSNUM_MSK (MSK(8) << GT_PCI0_CFGADDR_BUSNUM_SHF)
+#define GT_PCI0_CFGADDR_CONFIGEN_SHF 31
+#define GT_PCI0_CFGADDR_CONFIGEN_MSK (MSK(1) << GT_PCI0_CFGADDR_CONFIGEN_SHF)
+#define GT_PCI0_CFGADDR_CONFIGEN_BIT GT_PCI0_CFGADDR_CONFIGEN_MSK
+
+/*
+ * Because of an error/peculiarity in the Galileo chip, we need to swap the
+ * bytes when running bigendian. We also provide non-swapping versions.
+ */
+#define __GT_READ(ofs) \
+ (*(volatile u32 *)(GT64120_BASE+(ofs)))
+#define __GT_WRITE(ofs, data) \
+ do { *(volatile u32 *)(GT64120_BASE+(ofs)) = (data); } while (0)
+#define GT_READ(ofs) le32_to_cpu(__GT_READ(ofs))
+#define GT_WRITE(ofs, data) __GT_WRITE(ofs, cpu_to_le32(data))
+
#endif /* _ASM_GT64120_H */
diff --git a/arch/mips/mach-malta/Makefile b/arch/mips/mach-malta/Makefile
index f3cc668..0c5a701 100644
--- a/arch/mips/mach-malta/Makefile
+++ b/arch/mips/mach-malta/Makefile
@@ -1 +1,2 @@
obj-y += reset.o
+obj-$(CONFIG_PCI) += pci.o
diff --git a/arch/mips/mach-malta/include/mach/mach-gt64120.h b/arch/mips/mach-malta/include/mach/mach-gt64120.h
index ed1e23e..8f20fcf 100644
--- a/arch/mips/mach-malta/include/mach/mach-gt64120.h
+++ b/arch/mips/mach-malta/include/mach/mach-gt64120.h
@@ -10,4 +10,6 @@
#define MIPS_GT_BASE 0x1be00000
+#define GT64120_BASE 0xbbe00000
+
#endif /* _ASM_MACH_MIPS_MACH_GT64120_DEP_H */
diff --git a/arch/mips/mach-malta/pci.c b/arch/mips/mach-malta/pci.c
new file mode 100644
index 0000000..15fd9ed
--- /dev/null
+++ b/arch/mips/mach-malta/pci.c
@@ -0,0 +1,246 @@
+#include <common.h>
+#include <types.h>
+#include <driver.h>
+#include <init.h>
+#include <mach/hardware.h>
+#include <asm/io.h>
+#include <asm/addrspace.h>
+
+#include <linux/pci.h>
+#include <asm/gt64120.h>
+
+#include <mach/mach-gt64120.h>
+
+#define PCI_ACCESS_READ 0
+#define PCI_ACCESS_WRITE 1
+
+static struct resource gt64120_mem_resource = {
+ .name = "GT-64120 PCI MEM",
+ .flags = IORESOURCE_MEM,
+};
+
+static struct resource gt64120_io_resource = {
+ .name = "GT-64120 PCI I/O",
+ .flags = IORESOURCE_IO,
+};
+
+static int gt64xxx_pci0_pcibios_config_access(unsigned char access_type,
+ struct pci_bus *bus, unsigned int devfn, int where, u32 *data)
+{
+ unsigned char busnum = bus->number;
+ u32 intr;
+
+ if ((busnum == 0) && (devfn >= PCI_DEVFN(31, 0)))
+ return -1; /* Because of a bug in the galileo (for slot 31). */
+
+ /* Clear cause register bits */
+ GT_WRITE(GT_INTRCAUSE_OFS, ~(GT_INTRCAUSE_MASABORT0_BIT |
+ GT_INTRCAUSE_TARABORT0_BIT));
+
+ /* Setup address */
+ GT_WRITE(GT_PCI0_CFGADDR_OFS,
+ (busnum << GT_PCI0_CFGADDR_BUSNUM_SHF) |
+ (devfn << GT_PCI0_CFGADDR_FUNCTNUM_SHF) |
+ ((where / 4) << GT_PCI0_CFGADDR_REGNUM_SHF) |
+ GT_PCI0_CFGADDR_CONFIGEN_BIT);
+
+ if (access_type == PCI_ACCESS_WRITE) {
+ if (busnum == 0 && PCI_SLOT(devfn) == 0) {
+ /*
+ * The Galileo system controller is acting
+ * differently than other devices.
+ */
+ GT_WRITE(GT_PCI0_CFGDATA_OFS, *data);
+ } else
+ __GT_WRITE(GT_PCI0_CFGDATA_OFS, *data);
+ } else {
+ if (busnum == 0 && PCI_SLOT(devfn) == 0) {
+ /*
+ * The Galileo system controller is acting
+ * differently than other devices.
+ */
+ *data = GT_READ(GT_PCI0_CFGDATA_OFS);
+ } else
+ *data = __GT_READ(GT_PCI0_CFGDATA_OFS);
+ }
+
+ /* Check for master or target abort */
+ intr = GT_READ(GT_INTRCAUSE_OFS);
+
+ if (intr & (GT_INTRCAUSE_MASABORT0_BIT | GT_INTRCAUSE_TARABORT0_BIT)) {
+ /* Error occurred */
+
+ /* Clear bits */
+ GT_WRITE(GT_INTRCAUSE_OFS, ~(GT_INTRCAUSE_MASABORT0_BIT |
+ GT_INTRCAUSE_TARABORT0_BIT));
+
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * We can't address 8 and 16 bit words directly. Instead we have to
+ * read/write a 32bit word and mask/modify the data we actually want.
+ */
+static int gt64xxx_pci0_pcibios_read(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 *val)
+{
+ u32 data = 0;
+
+ if (gt64xxx_pci0_pcibios_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;
+}
+
+static int gt64xxx_pci0_pcibios_write(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 val)
+{
+ u32 data = 0;
+
+ if (size == 4)
+ data = val;
+ else {
+ if (gt64xxx_pci0_pcibios_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 (gt64xxx_pci0_pcibios_config_access(PCI_ACCESS_WRITE, bus, devfn,
+ where, &data))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+/* FIXME: it's HACK */
+/* function returns memory address for begin of pci resource */
+static int gt64xxx_res_start(struct pci_bus *bus, resource_size_t res_addr)
+{
+ return res_addr | 0xa0000000;
+}
+
+struct pci_ops gt64xxx_pci0_ops = {
+ .read = gt64xxx_pci0_pcibios_read,
+ .write = gt64xxx_pci0_pcibios_write,
+
+ .res_start = gt64xxx_res_start,
+};
+
+static struct pci_controller gt64120_controller = {
+ .pci_ops = >64xxx_pci0_ops,
+ .io_resource = >64120_io_resource,
+ .mem_resource = >64120_mem_resource,
+};
+
+static int pcibios_init(void)
+{
+ resource_size_t start, end, map, start1, end1, map1, mask, res_end;
+
+ /*
+ * Due to a bug in the Galileo system controller, we need
+ * to setup the PCI BAR for the Galileo internal registers.
+ * This should be done in the bios/bootprom and will be
+ * fixed in a later revision of YAMON (the MIPS boards
+ * boot prom).
+ */
+ GT_WRITE(GT_PCI0_CFGADDR_OFS,
+ (0 << GT_PCI0_CFGADDR_BUSNUM_SHF) | /* Local bus */
+ (0 << GT_PCI0_CFGADDR_DEVNUM_SHF) | /* GT64120 dev */
+ (0 << GT_PCI0_CFGADDR_FUNCTNUM_SHF) | /* Function 0*/
+ ((0x20/4) << GT_PCI0_CFGADDR_REGNUM_SHF) | /* BAR 4*/
+ GT_PCI0_CFGADDR_CONFIGEN_BIT);
+
+ /* Perform the write */
+ GT_WRITE(GT_PCI0_CFGDATA_OFS, CPHYSADDR(MIPS_GT_BASE));
+
+ /* Here is linux code. It assumes, that firmware
+ (pbl in case of barebox) made the work... */
+
+ /* Set up resource ranges from the controller's registers. */
+ start = GT_READ(GT_PCI0M0LD_OFS);
+ end = GT_READ(GT_PCI0M0HD_OFS);
+ map = GT_READ(GT_PCI0M0REMAP_OFS);
+ end = (end & GT_PCI_HD_MSK) | (start & ~GT_PCI_HD_MSK);
+ start1 = GT_READ(GT_PCI0M1LD_OFS);
+ end1 = GT_READ(GT_PCI0M1HD_OFS);
+ map1 = GT_READ(GT_PCI0M1REMAP_OFS);
+ end1 = (end1 & GT_PCI_HD_MSK) | (start1 & ~GT_PCI_HD_MSK);
+
+#if 0
+ /* Cannot support multiple windows, use the wider. */
+ if (end1 - start1 > end - start) {
+ start = start1;
+ end = end1;
+ map = map1;
+ }
+#endif
+
+ mask = ~(start ^ end);
+
+ /* We don't support remapping with a discontiguous mask. */
+ BUG_ON((start & GT_PCI_HD_MSK) != (map & GT_PCI_HD_MSK) &&
+ mask != ~((mask & -mask) - 1));
+ gt64120_mem_resource.start = start;
+ gt64120_mem_resource.end = end;
+ gt64120_controller.mem_offset = (start & mask) - (map & mask);
+ /* Addresses are 36-bit, so do shifts in the destinations. */
+ gt64120_mem_resource.start <<= GT_PCI_DCRM_SHF;
+ gt64120_mem_resource.end <<= GT_PCI_DCRM_SHF;
+ gt64120_mem_resource.end |= (1 << GT_PCI_DCRM_SHF) - 1;
+ gt64120_controller.mem_offset <<= GT_PCI_DCRM_SHF;
+
+ start = GT_READ(GT_PCI0IOLD_OFS);
+ end = GT_READ(GT_PCI0IOHD_OFS);
+ map = GT_READ(GT_PCI0IOREMAP_OFS);
+ end = (end & GT_PCI_HD_MSK) | (start & ~GT_PCI_HD_MSK);
+ mask = ~(start ^ end);
+
+ /* We don't support remapping with a discontiguous mask. */
+ BUG_ON((start & GT_PCI_HD_MSK) != (map & GT_PCI_HD_MSK) &&
+ mask != ~((mask & -mask) - 1));
+ gt64120_io_resource.start = map & mask;
+ res_end = (map & mask) | ~mask;
+ gt64120_controller.io_offset = 0;
+ /* Addresses are 36-bit, so do shifts in the destinations. */
+ gt64120_io_resource.start <<= GT_PCI_DCRM_SHF;
+ gt64120_io_resource.end <<= GT_PCI_DCRM_SHF;
+ gt64120_io_resource.end |= (1 << GT_PCI_DCRM_SHF) - 1;
+
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+ GT_WRITE(GT_PCI0_CMD_OFS, GT_PCI0_CMD_MBYTESWAP_BIT |
+ GT_PCI0_CMD_SBYTESWAP_BIT);
+#else
+ GT_WRITE(GT_PCI0_CMD_OFS, 0);
+#endif
+
+ /* Fix up PCI I/O mapping if necessary (for Atlas). */
+ start = GT_READ(GT_PCI0IOLD_OFS);
+ map = GT_READ(GT_PCI0IOREMAP_OFS);
+ if ((start & map) != 0) {
+ map &= ~start;
+ GT_WRITE(GT_PCI0IOREMAP_OFS, map);
+ }
+
+ register_pci_controller(>64120_controller);
+
+ return 0;
+}
+postcore_initcall(pcibios_init);
--
1.9.2
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^ permalink raw reply [flat|nested] 11+ messages in thread* [RFC v3 5/5] MIPS: qemu-malta_defconfig: enable PCI & network stuff
2014-06-25 22:32 [RFC v3 0/5] barebox PCI support Antony Pavlov
` (3 preceding siblings ...)
2014-06-25 22:32 ` [RFC v3 4/5] MIPS: add PCI support for GT64120-based Malta board Antony Pavlov
@ 2014-06-25 22:32 ` Antony Pavlov
4 siblings, 0 replies; 11+ messages in thread
From: Antony Pavlov @ 2014-06-25 22:32 UTC (permalink / raw)
To: barebox; +Cc: Clément Leger
qemu usage:
# ifconfig br0:1 172.20.0.1
# qemu-system-mips -nodefaults -nographic -M malta -m 256 \
-serial stdio -monitor null \
-bios ./barebox-flash-image \
-net nic,vlan=0,model=rtl8139 \
-net tap,vlan=0,script=net_br0.sh
...
barebox:/ eth0.ipaddr=172.20.0.2
barebox:/ eth0.serverip=172.20.0.1
barebox:/ ping 172.20.0.1
phy0: Link is up - 100/Full
host 172.20.0.1 is alive
barebox:/
Sample net_br0.sh (for connecting to br0 interface, so you can
connect barebox to your real network):
#!/bin/sh
brctl addif br0 $1
ifconfig $1 up
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
arch/mips/configs/qemu-malta_defconfig | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/mips/configs/qemu-malta_defconfig b/arch/mips/configs/qemu-malta_defconfig
index 78f175d..4fee70e 100644
--- a/arch/mips/configs/qemu-malta_defconfig
+++ b/arch/mips/configs/qemu-malta_defconfig
@@ -1,5 +1,7 @@
CONFIG_BUILTIN_DTB=y
CONFIG_BUILTIN_DTB_NAME="qemu-malta"
+CONFIG_PCI=y
+CONFIG_PCI_DEBUG=y
CONFIG_PBL_IMAGE=y
CONFIG_STACK_SIZE=0x7000
CONFIG_BROKEN=y
@@ -32,6 +34,7 @@ CONFIG_CMD_UNCOMPRESS=y
CONFIG_CMD_GETOPT=y
CONFIG_CMD_SLEEP=y
CONFIG_CMD_DHCP=y
+CONFIG_CMD_MIITOOL=y
CONFIG_CMD_PING=y
CONFIG_CMD_TFTP=y
CONFIG_CMD_ECHO_E=y
@@ -56,6 +59,7 @@ CONFIG_NET_NETCONSOLE=y
CONFIG_NET_RESOLV=y
CONFIG_OFDEVICE=y
CONFIG_OF_BAREBOX_DRIVERS=y
+CONFIG_DRIVER_NET_RTL8139=y
# CONFIG_SPI is not set
CONFIG_I2C=y
CONFIG_I2C_GPIO=y
--
1.9.2
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^ permalink raw reply [flat|nested] 11+ messages in thread