mirror of
https://github.com/edk2-porting/linux-next.git
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f39d01be4c
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (44 commits) vlynq: make whole Kconfig-menu dependant on architecture add descriptive comment for TIF_MEMDIE task flag declaration. EEPROM: max6875: Header file cleanup EEPROM: 93cx6: Header file cleanup EEPROM: Header file cleanup agp: use NULL instead of 0 when pointer is needed rtc-v3020: make bitfield unsigned PCI: make bitfield unsigned jbd2: use NULL instead of 0 when pointer is needed cciss: fix shadows sparse warning doc: inode uses a mutex instead of a semaphore. uml: i386: Avoid redefinition of NR_syscalls fix "seperate" typos in comments cocbalt_lcdfb: correct sections doc: Change urls for sparse Powerpc: wii: Fix typo in comment i2o: cleanup some exit paths Documentation/: it's -> its where appropriate UML: Fix compiler warning due to missing task_struct declaration UML: add kernel.h include to signal.c ...
2595 lines
72 KiB
C
2595 lines
72 KiB
C
/*
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* Driver for OHCI 1394 controllers
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*
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* Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <linux/compiler.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/firewire.h>
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#include <linux/firewire-constants.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/pci.h>
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#include <linux/pci_ids.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/string.h>
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#include <asm/byteorder.h>
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#include <asm/page.h>
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#include <asm/system.h>
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#ifdef CONFIG_PPC_PMAC
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#include <asm/pmac_feature.h>
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#endif
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#include "core.h"
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#include "ohci.h"
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#define DESCRIPTOR_OUTPUT_MORE 0
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#define DESCRIPTOR_OUTPUT_LAST (1 << 12)
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#define DESCRIPTOR_INPUT_MORE (2 << 12)
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#define DESCRIPTOR_INPUT_LAST (3 << 12)
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#define DESCRIPTOR_STATUS (1 << 11)
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#define DESCRIPTOR_KEY_IMMEDIATE (2 << 8)
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#define DESCRIPTOR_PING (1 << 7)
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#define DESCRIPTOR_YY (1 << 6)
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#define DESCRIPTOR_NO_IRQ (0 << 4)
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#define DESCRIPTOR_IRQ_ERROR (1 << 4)
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#define DESCRIPTOR_IRQ_ALWAYS (3 << 4)
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#define DESCRIPTOR_BRANCH_ALWAYS (3 << 2)
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#define DESCRIPTOR_WAIT (3 << 0)
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struct descriptor {
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__le16 req_count;
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__le16 control;
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__le32 data_address;
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__le32 branch_address;
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__le16 res_count;
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__le16 transfer_status;
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} __attribute__((aligned(16)));
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#define CONTROL_SET(regs) (regs)
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#define CONTROL_CLEAR(regs) ((regs) + 4)
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#define COMMAND_PTR(regs) ((regs) + 12)
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#define CONTEXT_MATCH(regs) ((regs) + 16)
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struct ar_buffer {
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struct descriptor descriptor;
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struct ar_buffer *next;
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__le32 data[0];
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};
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struct ar_context {
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struct fw_ohci *ohci;
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struct ar_buffer *current_buffer;
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struct ar_buffer *last_buffer;
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void *pointer;
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u32 regs;
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struct tasklet_struct tasklet;
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};
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struct context;
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typedef int (*descriptor_callback_t)(struct context *ctx,
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struct descriptor *d,
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struct descriptor *last);
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/*
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* A buffer that contains a block of DMA-able coherent memory used for
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* storing a portion of a DMA descriptor program.
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*/
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struct descriptor_buffer {
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struct list_head list;
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dma_addr_t buffer_bus;
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size_t buffer_size;
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size_t used;
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struct descriptor buffer[0];
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};
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struct context {
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struct fw_ohci *ohci;
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u32 regs;
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int total_allocation;
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/*
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* List of page-sized buffers for storing DMA descriptors.
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* Head of list contains buffers in use and tail of list contains
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* free buffers.
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*/
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struct list_head buffer_list;
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/*
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* Pointer to a buffer inside buffer_list that contains the tail
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* end of the current DMA program.
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*/
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struct descriptor_buffer *buffer_tail;
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/*
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* The descriptor containing the branch address of the first
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* descriptor that has not yet been filled by the device.
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*/
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struct descriptor *last;
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/*
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* The last descriptor in the DMA program. It contains the branch
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* address that must be updated upon appending a new descriptor.
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*/
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struct descriptor *prev;
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descriptor_callback_t callback;
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struct tasklet_struct tasklet;
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};
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#define IT_HEADER_SY(v) ((v) << 0)
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#define IT_HEADER_TCODE(v) ((v) << 4)
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#define IT_HEADER_CHANNEL(v) ((v) << 8)
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#define IT_HEADER_TAG(v) ((v) << 14)
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#define IT_HEADER_SPEED(v) ((v) << 16)
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#define IT_HEADER_DATA_LENGTH(v) ((v) << 16)
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struct iso_context {
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struct fw_iso_context base;
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struct context context;
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int excess_bytes;
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void *header;
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size_t header_length;
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};
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#define CONFIG_ROM_SIZE 1024
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struct fw_ohci {
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struct fw_card card;
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__iomem char *registers;
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int node_id;
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int generation;
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int request_generation; /* for timestamping incoming requests */
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unsigned quirks;
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/*
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* Spinlock for accessing fw_ohci data. Never call out of
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* this driver with this lock held.
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*/
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spinlock_t lock;
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struct ar_context ar_request_ctx;
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struct ar_context ar_response_ctx;
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struct context at_request_ctx;
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struct context at_response_ctx;
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u32 it_context_mask;
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struct iso_context *it_context_list;
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u64 ir_context_channels;
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u32 ir_context_mask;
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struct iso_context *ir_context_list;
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__be32 *config_rom;
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dma_addr_t config_rom_bus;
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__be32 *next_config_rom;
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dma_addr_t next_config_rom_bus;
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__be32 next_header;
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__le32 *self_id_cpu;
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dma_addr_t self_id_bus;
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struct tasklet_struct bus_reset_tasklet;
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u32 self_id_buffer[512];
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};
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static inline struct fw_ohci *fw_ohci(struct fw_card *card)
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{
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return container_of(card, struct fw_ohci, card);
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}
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#define IT_CONTEXT_CYCLE_MATCH_ENABLE 0x80000000
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#define IR_CONTEXT_BUFFER_FILL 0x80000000
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#define IR_CONTEXT_ISOCH_HEADER 0x40000000
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#define IR_CONTEXT_CYCLE_MATCH_ENABLE 0x20000000
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#define IR_CONTEXT_MULTI_CHANNEL_MODE 0x10000000
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#define IR_CONTEXT_DUAL_BUFFER_MODE 0x08000000
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#define CONTEXT_RUN 0x8000
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#define CONTEXT_WAKE 0x1000
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#define CONTEXT_DEAD 0x0800
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#define CONTEXT_ACTIVE 0x0400
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#define OHCI1394_MAX_AT_REQ_RETRIES 0xf
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#define OHCI1394_MAX_AT_RESP_RETRIES 0x2
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#define OHCI1394_MAX_PHYS_RESP_RETRIES 0x8
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#define OHCI1394_REGISTER_SIZE 0x800
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#define OHCI_LOOP_COUNT 500
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#define OHCI1394_PCI_HCI_Control 0x40
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#define SELF_ID_BUF_SIZE 0x800
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#define OHCI_TCODE_PHY_PACKET 0x0e
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#define OHCI_VERSION_1_1 0x010010
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static char ohci_driver_name[] = KBUILD_MODNAME;
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#define PCI_DEVICE_ID_TI_TSB12LV22 0x8009
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#define QUIRK_CYCLE_TIMER 1
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#define QUIRK_RESET_PACKET 2
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#define QUIRK_BE_HEADERS 4
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/* In case of multiple matches in ohci_quirks[], only the first one is used. */
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static const struct {
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unsigned short vendor, device, flags;
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} ohci_quirks[] = {
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{PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_TSB12LV22, QUIRK_CYCLE_TIMER |
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QUIRK_RESET_PACKET},
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{PCI_VENDOR_ID_TI, PCI_ANY_ID, QUIRK_RESET_PACKET},
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{PCI_VENDOR_ID_AL, PCI_ANY_ID, QUIRK_CYCLE_TIMER},
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{PCI_VENDOR_ID_NEC, PCI_ANY_ID, QUIRK_CYCLE_TIMER},
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{PCI_VENDOR_ID_VIA, PCI_ANY_ID, QUIRK_CYCLE_TIMER},
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{PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_FW, QUIRK_BE_HEADERS},
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};
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/* This overrides anything that was found in ohci_quirks[]. */
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static int param_quirks;
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module_param_named(quirks, param_quirks, int, 0644);
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MODULE_PARM_DESC(quirks, "Chip quirks (default = 0"
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", nonatomic cycle timer = " __stringify(QUIRK_CYCLE_TIMER)
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", reset packet generation = " __stringify(QUIRK_RESET_PACKET)
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", AR/selfID endianess = " __stringify(QUIRK_BE_HEADERS)
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")");
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#ifdef CONFIG_FIREWIRE_OHCI_DEBUG
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#define OHCI_PARAM_DEBUG_AT_AR 1
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#define OHCI_PARAM_DEBUG_SELFIDS 2
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#define OHCI_PARAM_DEBUG_IRQS 4
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#define OHCI_PARAM_DEBUG_BUSRESETS 8 /* only effective before chip init */
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static int param_debug;
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module_param_named(debug, param_debug, int, 0644);
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MODULE_PARM_DESC(debug, "Verbose logging (default = 0"
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", AT/AR events = " __stringify(OHCI_PARAM_DEBUG_AT_AR)
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", self-IDs = " __stringify(OHCI_PARAM_DEBUG_SELFIDS)
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", IRQs = " __stringify(OHCI_PARAM_DEBUG_IRQS)
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", busReset events = " __stringify(OHCI_PARAM_DEBUG_BUSRESETS)
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", or a combination, or all = -1)");
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static void log_irqs(u32 evt)
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{
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if (likely(!(param_debug &
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(OHCI_PARAM_DEBUG_IRQS | OHCI_PARAM_DEBUG_BUSRESETS))))
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return;
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if (!(param_debug & OHCI_PARAM_DEBUG_IRQS) &&
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!(evt & OHCI1394_busReset))
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return;
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fw_notify("IRQ %08x%s%s%s%s%s%s%s%s%s%s%s%s%s\n", evt,
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evt & OHCI1394_selfIDComplete ? " selfID" : "",
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evt & OHCI1394_RQPkt ? " AR_req" : "",
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evt & OHCI1394_RSPkt ? " AR_resp" : "",
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evt & OHCI1394_reqTxComplete ? " AT_req" : "",
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evt & OHCI1394_respTxComplete ? " AT_resp" : "",
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evt & OHCI1394_isochRx ? " IR" : "",
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evt & OHCI1394_isochTx ? " IT" : "",
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evt & OHCI1394_postedWriteErr ? " postedWriteErr" : "",
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evt & OHCI1394_cycleTooLong ? " cycleTooLong" : "",
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evt & OHCI1394_cycleInconsistent ? " cycleInconsistent" : "",
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evt & OHCI1394_regAccessFail ? " regAccessFail" : "",
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evt & OHCI1394_busReset ? " busReset" : "",
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evt & ~(OHCI1394_selfIDComplete | OHCI1394_RQPkt |
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OHCI1394_RSPkt | OHCI1394_reqTxComplete |
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OHCI1394_respTxComplete | OHCI1394_isochRx |
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OHCI1394_isochTx | OHCI1394_postedWriteErr |
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OHCI1394_cycleTooLong | OHCI1394_cycleInconsistent |
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OHCI1394_regAccessFail | OHCI1394_busReset)
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? " ?" : "");
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}
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static const char *speed[] = {
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[0] = "S100", [1] = "S200", [2] = "S400", [3] = "beta",
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};
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static const char *power[] = {
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[0] = "+0W", [1] = "+15W", [2] = "+30W", [3] = "+45W",
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[4] = "-3W", [5] = " ?W", [6] = "-3..-6W", [7] = "-3..-10W",
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};
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static const char port[] = { '.', '-', 'p', 'c', };
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static char _p(u32 *s, int shift)
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{
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return port[*s >> shift & 3];
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}
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static void log_selfids(int node_id, int generation, int self_id_count, u32 *s)
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{
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if (likely(!(param_debug & OHCI_PARAM_DEBUG_SELFIDS)))
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return;
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fw_notify("%d selfIDs, generation %d, local node ID %04x\n",
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self_id_count, generation, node_id);
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for (; self_id_count--; ++s)
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if ((*s & 1 << 23) == 0)
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fw_notify("selfID 0: %08x, phy %d [%c%c%c] "
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"%s gc=%d %s %s%s%s\n",
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*s, *s >> 24 & 63, _p(s, 6), _p(s, 4), _p(s, 2),
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speed[*s >> 14 & 3], *s >> 16 & 63,
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power[*s >> 8 & 7], *s >> 22 & 1 ? "L" : "",
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*s >> 11 & 1 ? "c" : "", *s & 2 ? "i" : "");
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else
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fw_notify("selfID n: %08x, phy %d [%c%c%c%c%c%c%c%c]\n",
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*s, *s >> 24 & 63,
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_p(s, 16), _p(s, 14), _p(s, 12), _p(s, 10),
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_p(s, 8), _p(s, 6), _p(s, 4), _p(s, 2));
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}
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static const char *evts[] = {
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[0x00] = "evt_no_status", [0x01] = "-reserved-",
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[0x02] = "evt_long_packet", [0x03] = "evt_missing_ack",
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[0x04] = "evt_underrun", [0x05] = "evt_overrun",
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[0x06] = "evt_descriptor_read", [0x07] = "evt_data_read",
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[0x08] = "evt_data_write", [0x09] = "evt_bus_reset",
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[0x0a] = "evt_timeout", [0x0b] = "evt_tcode_err",
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[0x0c] = "-reserved-", [0x0d] = "-reserved-",
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[0x0e] = "evt_unknown", [0x0f] = "evt_flushed",
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[0x10] = "-reserved-", [0x11] = "ack_complete",
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[0x12] = "ack_pending ", [0x13] = "-reserved-",
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[0x14] = "ack_busy_X", [0x15] = "ack_busy_A",
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[0x16] = "ack_busy_B", [0x17] = "-reserved-",
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[0x18] = "-reserved-", [0x19] = "-reserved-",
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[0x1a] = "-reserved-", [0x1b] = "ack_tardy",
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[0x1c] = "-reserved-", [0x1d] = "ack_data_error",
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[0x1e] = "ack_type_error", [0x1f] = "-reserved-",
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[0x20] = "pending/cancelled",
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};
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static const char *tcodes[] = {
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[0x0] = "QW req", [0x1] = "BW req",
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[0x2] = "W resp", [0x3] = "-reserved-",
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[0x4] = "QR req", [0x5] = "BR req",
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[0x6] = "QR resp", [0x7] = "BR resp",
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[0x8] = "cycle start", [0x9] = "Lk req",
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[0xa] = "async stream packet", [0xb] = "Lk resp",
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[0xc] = "-reserved-", [0xd] = "-reserved-",
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[0xe] = "link internal", [0xf] = "-reserved-",
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};
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static const char *phys[] = {
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[0x0] = "phy config packet", [0x1] = "link-on packet",
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[0x2] = "self-id packet", [0x3] = "-reserved-",
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};
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static void log_ar_at_event(char dir, int speed, u32 *header, int evt)
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{
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int tcode = header[0] >> 4 & 0xf;
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char specific[12];
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if (likely(!(param_debug & OHCI_PARAM_DEBUG_AT_AR)))
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return;
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if (unlikely(evt >= ARRAY_SIZE(evts)))
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evt = 0x1f;
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if (evt == OHCI1394_evt_bus_reset) {
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fw_notify("A%c evt_bus_reset, generation %d\n",
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dir, (header[2] >> 16) & 0xff);
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return;
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}
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if (header[0] == ~header[1]) {
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fw_notify("A%c %s, %s, %08x\n",
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dir, evts[evt], phys[header[0] >> 30 & 0x3], header[0]);
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return;
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}
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switch (tcode) {
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case 0x0: case 0x6: case 0x8:
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snprintf(specific, sizeof(specific), " = %08x",
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be32_to_cpu((__force __be32)header[3]));
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break;
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case 0x1: case 0x5: case 0x7: case 0x9: case 0xb:
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snprintf(specific, sizeof(specific), " %x,%x",
|
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header[3] >> 16, header[3] & 0xffff);
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break;
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default:
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specific[0] = '\0';
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}
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switch (tcode) {
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case 0xe: case 0xa:
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fw_notify("A%c %s, %s\n", dir, evts[evt], tcodes[tcode]);
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break;
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case 0x0: case 0x1: case 0x4: case 0x5: case 0x9:
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fw_notify("A%c spd %x tl %02x, "
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"%04x -> %04x, %s, "
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"%s, %04x%08x%s\n",
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dir, speed, header[0] >> 10 & 0x3f,
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header[1] >> 16, header[0] >> 16, evts[evt],
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tcodes[tcode], header[1] & 0xffff, header[2], specific);
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break;
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default:
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|
fw_notify("A%c spd %x tl %02x, "
|
|
"%04x -> %04x, %s, "
|
|
"%s%s\n",
|
|
dir, speed, header[0] >> 10 & 0x3f,
|
|
header[1] >> 16, header[0] >> 16, evts[evt],
|
|
tcodes[tcode], specific);
|
|
}
|
|
}
|
|
|
|
#else
|
|
|
|
#define log_irqs(evt)
|
|
#define log_selfids(node_id, generation, self_id_count, sid)
|
|
#define log_ar_at_event(dir, speed, header, evt)
|
|
|
|
#endif /* CONFIG_FIREWIRE_OHCI_DEBUG */
|
|
|
|
static inline void reg_write(const struct fw_ohci *ohci, int offset, u32 data)
|
|
{
|
|
writel(data, ohci->registers + offset);
|
|
}
|
|
|
|
static inline u32 reg_read(const struct fw_ohci *ohci, int offset)
|
|
{
|
|
return readl(ohci->registers + offset);
|
|
}
|
|
|
|
static inline void flush_writes(const struct fw_ohci *ohci)
|
|
{
|
|
/* Do a dummy read to flush writes. */
|
|
reg_read(ohci, OHCI1394_Version);
|
|
}
|
|
|
|
static int ohci_update_phy_reg(struct fw_card *card, int addr,
|
|
int clear_bits, int set_bits)
|
|
{
|
|
struct fw_ohci *ohci = fw_ohci(card);
|
|
u32 val, old;
|
|
|
|
reg_write(ohci, OHCI1394_PhyControl, OHCI1394_PhyControl_Read(addr));
|
|
flush_writes(ohci);
|
|
msleep(2);
|
|
val = reg_read(ohci, OHCI1394_PhyControl);
|
|
if ((val & OHCI1394_PhyControl_ReadDone) == 0) {
|
|
fw_error("failed to set phy reg bits.\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
old = OHCI1394_PhyControl_ReadData(val);
|
|
old = (old & ~clear_bits) | set_bits;
|
|
reg_write(ohci, OHCI1394_PhyControl,
|
|
OHCI1394_PhyControl_Write(addr, old));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ar_context_add_page(struct ar_context *ctx)
|
|
{
|
|
struct device *dev = ctx->ohci->card.device;
|
|
struct ar_buffer *ab;
|
|
dma_addr_t uninitialized_var(ab_bus);
|
|
size_t offset;
|
|
|
|
ab = dma_alloc_coherent(dev, PAGE_SIZE, &ab_bus, GFP_ATOMIC);
|
|
if (ab == NULL)
|
|
return -ENOMEM;
|
|
|
|
ab->next = NULL;
|
|
memset(&ab->descriptor, 0, sizeof(ab->descriptor));
|
|
ab->descriptor.control = cpu_to_le16(DESCRIPTOR_INPUT_MORE |
|
|
DESCRIPTOR_STATUS |
|
|
DESCRIPTOR_BRANCH_ALWAYS);
|
|
offset = offsetof(struct ar_buffer, data);
|
|
ab->descriptor.req_count = cpu_to_le16(PAGE_SIZE - offset);
|
|
ab->descriptor.data_address = cpu_to_le32(ab_bus + offset);
|
|
ab->descriptor.res_count = cpu_to_le16(PAGE_SIZE - offset);
|
|
ab->descriptor.branch_address = 0;
|
|
|
|
ctx->last_buffer->descriptor.branch_address = cpu_to_le32(ab_bus | 1);
|
|
ctx->last_buffer->next = ab;
|
|
ctx->last_buffer = ab;
|
|
|
|
reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE);
|
|
flush_writes(ctx->ohci);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ar_context_release(struct ar_context *ctx)
|
|
{
|
|
struct ar_buffer *ab, *ab_next;
|
|
size_t offset;
|
|
dma_addr_t ab_bus;
|
|
|
|
for (ab = ctx->current_buffer; ab; ab = ab_next) {
|
|
ab_next = ab->next;
|
|
offset = offsetof(struct ar_buffer, data);
|
|
ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset;
|
|
dma_free_coherent(ctx->ohci->card.device, PAGE_SIZE,
|
|
ab, ab_bus);
|
|
}
|
|
}
|
|
|
|
#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
|
|
#define cond_le32_to_cpu(v) \
|
|
(ohci->quirks & QUIRK_BE_HEADERS ? (__force __u32)(v) : le32_to_cpu(v))
|
|
#else
|
|
#define cond_le32_to_cpu(v) le32_to_cpu(v)
|
|
#endif
|
|
|
|
static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
|
|
{
|
|
struct fw_ohci *ohci = ctx->ohci;
|
|
struct fw_packet p;
|
|
u32 status, length, tcode;
|
|
int evt;
|
|
|
|
p.header[0] = cond_le32_to_cpu(buffer[0]);
|
|
p.header[1] = cond_le32_to_cpu(buffer[1]);
|
|
p.header[2] = cond_le32_to_cpu(buffer[2]);
|
|
|
|
tcode = (p.header[0] >> 4) & 0x0f;
|
|
switch (tcode) {
|
|
case TCODE_WRITE_QUADLET_REQUEST:
|
|
case TCODE_READ_QUADLET_RESPONSE:
|
|
p.header[3] = (__force __u32) buffer[3];
|
|
p.header_length = 16;
|
|
p.payload_length = 0;
|
|
break;
|
|
|
|
case TCODE_READ_BLOCK_REQUEST :
|
|
p.header[3] = cond_le32_to_cpu(buffer[3]);
|
|
p.header_length = 16;
|
|
p.payload_length = 0;
|
|
break;
|
|
|
|
case TCODE_WRITE_BLOCK_REQUEST:
|
|
case TCODE_READ_BLOCK_RESPONSE:
|
|
case TCODE_LOCK_REQUEST:
|
|
case TCODE_LOCK_RESPONSE:
|
|
p.header[3] = cond_le32_to_cpu(buffer[3]);
|
|
p.header_length = 16;
|
|
p.payload_length = p.header[3] >> 16;
|
|
break;
|
|
|
|
case TCODE_WRITE_RESPONSE:
|
|
case TCODE_READ_QUADLET_REQUEST:
|
|
case OHCI_TCODE_PHY_PACKET:
|
|
p.header_length = 12;
|
|
p.payload_length = 0;
|
|
break;
|
|
|
|
default:
|
|
/* FIXME: Stop context, discard everything, and restart? */
|
|
p.header_length = 0;
|
|
p.payload_length = 0;
|
|
}
|
|
|
|
p.payload = (void *) buffer + p.header_length;
|
|
|
|
/* FIXME: What to do about evt_* errors? */
|
|
length = (p.header_length + p.payload_length + 3) / 4;
|
|
status = cond_le32_to_cpu(buffer[length]);
|
|
evt = (status >> 16) & 0x1f;
|
|
|
|
p.ack = evt - 16;
|
|
p.speed = (status >> 21) & 0x7;
|
|
p.timestamp = status & 0xffff;
|
|
p.generation = ohci->request_generation;
|
|
|
|
log_ar_at_event('R', p.speed, p.header, evt);
|
|
|
|
/*
|
|
* The OHCI bus reset handler synthesizes a phy packet with
|
|
* the new generation number when a bus reset happens (see
|
|
* section 8.4.2.3). This helps us determine when a request
|
|
* was received and make sure we send the response in the same
|
|
* generation. We only need this for requests; for responses
|
|
* we use the unique tlabel for finding the matching
|
|
* request.
|
|
*
|
|
* Alas some chips sometimes emit bus reset packets with a
|
|
* wrong generation. We set the correct generation for these
|
|
* at a slightly incorrect time (in bus_reset_tasklet).
|
|
*/
|
|
if (evt == OHCI1394_evt_bus_reset) {
|
|
if (!(ohci->quirks & QUIRK_RESET_PACKET))
|
|
ohci->request_generation = (p.header[2] >> 16) & 0xff;
|
|
} else if (ctx == &ohci->ar_request_ctx) {
|
|
fw_core_handle_request(&ohci->card, &p);
|
|
} else {
|
|
fw_core_handle_response(&ohci->card, &p);
|
|
}
|
|
|
|
return buffer + length + 1;
|
|
}
|
|
|
|
static void ar_context_tasklet(unsigned long data)
|
|
{
|
|
struct ar_context *ctx = (struct ar_context *)data;
|
|
struct fw_ohci *ohci = ctx->ohci;
|
|
struct ar_buffer *ab;
|
|
struct descriptor *d;
|
|
void *buffer, *end;
|
|
|
|
ab = ctx->current_buffer;
|
|
d = &ab->descriptor;
|
|
|
|
if (d->res_count == 0) {
|
|
size_t size, rest, offset;
|
|
dma_addr_t start_bus;
|
|
void *start;
|
|
|
|
/*
|
|
* This descriptor is finished and we may have a
|
|
* packet split across this and the next buffer. We
|
|
* reuse the page for reassembling the split packet.
|
|
*/
|
|
|
|
offset = offsetof(struct ar_buffer, data);
|
|
start = buffer = ab;
|
|
start_bus = le32_to_cpu(ab->descriptor.data_address) - offset;
|
|
|
|
ab = ab->next;
|
|
d = &ab->descriptor;
|
|
size = buffer + PAGE_SIZE - ctx->pointer;
|
|
rest = le16_to_cpu(d->req_count) - le16_to_cpu(d->res_count);
|
|
memmove(buffer, ctx->pointer, size);
|
|
memcpy(buffer + size, ab->data, rest);
|
|
ctx->current_buffer = ab;
|
|
ctx->pointer = (void *) ab->data + rest;
|
|
end = buffer + size + rest;
|
|
|
|
while (buffer < end)
|
|
buffer = handle_ar_packet(ctx, buffer);
|
|
|
|
dma_free_coherent(ohci->card.device, PAGE_SIZE,
|
|
start, start_bus);
|
|
ar_context_add_page(ctx);
|
|
} else {
|
|
buffer = ctx->pointer;
|
|
ctx->pointer = end =
|
|
(void *) ab + PAGE_SIZE - le16_to_cpu(d->res_count);
|
|
|
|
while (buffer < end)
|
|
buffer = handle_ar_packet(ctx, buffer);
|
|
}
|
|
}
|
|
|
|
static int ar_context_init(struct ar_context *ctx,
|
|
struct fw_ohci *ohci, u32 regs)
|
|
{
|
|
struct ar_buffer ab;
|
|
|
|
ctx->regs = regs;
|
|
ctx->ohci = ohci;
|
|
ctx->last_buffer = &ab;
|
|
tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx);
|
|
|
|
ar_context_add_page(ctx);
|
|
ar_context_add_page(ctx);
|
|
ctx->current_buffer = ab.next;
|
|
ctx->pointer = ctx->current_buffer->data;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ar_context_run(struct ar_context *ctx)
|
|
{
|
|
struct ar_buffer *ab = ctx->current_buffer;
|
|
dma_addr_t ab_bus;
|
|
size_t offset;
|
|
|
|
offset = offsetof(struct ar_buffer, data);
|
|
ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset;
|
|
|
|
reg_write(ctx->ohci, COMMAND_PTR(ctx->regs), ab_bus | 1);
|
|
reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN);
|
|
flush_writes(ctx->ohci);
|
|
}
|
|
|
|
static struct descriptor *find_branch_descriptor(struct descriptor *d, int z)
|
|
{
|
|
int b, key;
|
|
|
|
b = (le16_to_cpu(d->control) & DESCRIPTOR_BRANCH_ALWAYS) >> 2;
|
|
key = (le16_to_cpu(d->control) & DESCRIPTOR_KEY_IMMEDIATE) >> 8;
|
|
|
|
/* figure out which descriptor the branch address goes in */
|
|
if (z == 2 && (b == 3 || key == 2))
|
|
return d;
|
|
else
|
|
return d + z - 1;
|
|
}
|
|
|
|
static void context_tasklet(unsigned long data)
|
|
{
|
|
struct context *ctx = (struct context *) data;
|
|
struct descriptor *d, *last;
|
|
u32 address;
|
|
int z;
|
|
struct descriptor_buffer *desc;
|
|
|
|
desc = list_entry(ctx->buffer_list.next,
|
|
struct descriptor_buffer, list);
|
|
last = ctx->last;
|
|
while (last->branch_address != 0) {
|
|
struct descriptor_buffer *old_desc = desc;
|
|
address = le32_to_cpu(last->branch_address);
|
|
z = address & 0xf;
|
|
address &= ~0xf;
|
|
|
|
/* If the branch address points to a buffer outside of the
|
|
* current buffer, advance to the next buffer. */
|
|
if (address < desc->buffer_bus ||
|
|
address >= desc->buffer_bus + desc->used)
|
|
desc = list_entry(desc->list.next,
|
|
struct descriptor_buffer, list);
|
|
d = desc->buffer + (address - desc->buffer_bus) / sizeof(*d);
|
|
last = find_branch_descriptor(d, z);
|
|
|
|
if (!ctx->callback(ctx, d, last))
|
|
break;
|
|
|
|
if (old_desc != desc) {
|
|
/* If we've advanced to the next buffer, move the
|
|
* previous buffer to the free list. */
|
|
unsigned long flags;
|
|
old_desc->used = 0;
|
|
spin_lock_irqsave(&ctx->ohci->lock, flags);
|
|
list_move_tail(&old_desc->list, &ctx->buffer_list);
|
|
spin_unlock_irqrestore(&ctx->ohci->lock, flags);
|
|
}
|
|
ctx->last = last;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Allocate a new buffer and add it to the list of free buffers for this
|
|
* context. Must be called with ohci->lock held.
|
|
*/
|
|
static int context_add_buffer(struct context *ctx)
|
|
{
|
|
struct descriptor_buffer *desc;
|
|
dma_addr_t uninitialized_var(bus_addr);
|
|
int offset;
|
|
|
|
/*
|
|
* 16MB of descriptors should be far more than enough for any DMA
|
|
* program. This will catch run-away userspace or DoS attacks.
|
|
*/
|
|
if (ctx->total_allocation >= 16*1024*1024)
|
|
return -ENOMEM;
|
|
|
|
desc = dma_alloc_coherent(ctx->ohci->card.device, PAGE_SIZE,
|
|
&bus_addr, GFP_ATOMIC);
|
|
if (!desc)
|
|
return -ENOMEM;
|
|
|
|
offset = (void *)&desc->buffer - (void *)desc;
|
|
desc->buffer_size = PAGE_SIZE - offset;
|
|
desc->buffer_bus = bus_addr + offset;
|
|
desc->used = 0;
|
|
|
|
list_add_tail(&desc->list, &ctx->buffer_list);
|
|
ctx->total_allocation += PAGE_SIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int context_init(struct context *ctx, struct fw_ohci *ohci,
|
|
u32 regs, descriptor_callback_t callback)
|
|
{
|
|
ctx->ohci = ohci;
|
|
ctx->regs = regs;
|
|
ctx->total_allocation = 0;
|
|
|
|
INIT_LIST_HEAD(&ctx->buffer_list);
|
|
if (context_add_buffer(ctx) < 0)
|
|
return -ENOMEM;
|
|
|
|
ctx->buffer_tail = list_entry(ctx->buffer_list.next,
|
|
struct descriptor_buffer, list);
|
|
|
|
tasklet_init(&ctx->tasklet, context_tasklet, (unsigned long)ctx);
|
|
ctx->callback = callback;
|
|
|
|
/*
|
|
* We put a dummy descriptor in the buffer that has a NULL
|
|
* branch address and looks like it's been sent. That way we
|
|
* have a descriptor to append DMA programs to.
|
|
*/
|
|
memset(ctx->buffer_tail->buffer, 0, sizeof(*ctx->buffer_tail->buffer));
|
|
ctx->buffer_tail->buffer->control = cpu_to_le16(DESCRIPTOR_OUTPUT_LAST);
|
|
ctx->buffer_tail->buffer->transfer_status = cpu_to_le16(0x8011);
|
|
ctx->buffer_tail->used += sizeof(*ctx->buffer_tail->buffer);
|
|
ctx->last = ctx->buffer_tail->buffer;
|
|
ctx->prev = ctx->buffer_tail->buffer;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void context_release(struct context *ctx)
|
|
{
|
|
struct fw_card *card = &ctx->ohci->card;
|
|
struct descriptor_buffer *desc, *tmp;
|
|
|
|
list_for_each_entry_safe(desc, tmp, &ctx->buffer_list, list)
|
|
dma_free_coherent(card->device, PAGE_SIZE, desc,
|
|
desc->buffer_bus -
|
|
((void *)&desc->buffer - (void *)desc));
|
|
}
|
|
|
|
/* Must be called with ohci->lock held */
|
|
static struct descriptor *context_get_descriptors(struct context *ctx,
|
|
int z, dma_addr_t *d_bus)
|
|
{
|
|
struct descriptor *d = NULL;
|
|
struct descriptor_buffer *desc = ctx->buffer_tail;
|
|
|
|
if (z * sizeof(*d) > desc->buffer_size)
|
|
return NULL;
|
|
|
|
if (z * sizeof(*d) > desc->buffer_size - desc->used) {
|
|
/* No room for the descriptor in this buffer, so advance to the
|
|
* next one. */
|
|
|
|
if (desc->list.next == &ctx->buffer_list) {
|
|
/* If there is no free buffer next in the list,
|
|
* allocate one. */
|
|
if (context_add_buffer(ctx) < 0)
|
|
return NULL;
|
|
}
|
|
desc = list_entry(desc->list.next,
|
|
struct descriptor_buffer, list);
|
|
ctx->buffer_tail = desc;
|
|
}
|
|
|
|
d = desc->buffer + desc->used / sizeof(*d);
|
|
memset(d, 0, z * sizeof(*d));
|
|
*d_bus = desc->buffer_bus + desc->used;
|
|
|
|
return d;
|
|
}
|
|
|
|
static void context_run(struct context *ctx, u32 extra)
|
|
{
|
|
struct fw_ohci *ohci = ctx->ohci;
|
|
|
|
reg_write(ohci, COMMAND_PTR(ctx->regs),
|
|
le32_to_cpu(ctx->last->branch_address));
|
|
reg_write(ohci, CONTROL_CLEAR(ctx->regs), ~0);
|
|
reg_write(ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN | extra);
|
|
flush_writes(ohci);
|
|
}
|
|
|
|
static void context_append(struct context *ctx,
|
|
struct descriptor *d, int z, int extra)
|
|
{
|
|
dma_addr_t d_bus;
|
|
struct descriptor_buffer *desc = ctx->buffer_tail;
|
|
|
|
d_bus = desc->buffer_bus + (d - desc->buffer) * sizeof(*d);
|
|
|
|
desc->used += (z + extra) * sizeof(*d);
|
|
ctx->prev->branch_address = cpu_to_le32(d_bus | z);
|
|
ctx->prev = find_branch_descriptor(d, z);
|
|
|
|
reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE);
|
|
flush_writes(ctx->ohci);
|
|
}
|
|
|
|
static void context_stop(struct context *ctx)
|
|
{
|
|
u32 reg;
|
|
int i;
|
|
|
|
reg_write(ctx->ohci, CONTROL_CLEAR(ctx->regs), CONTEXT_RUN);
|
|
flush_writes(ctx->ohci);
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs));
|
|
if ((reg & CONTEXT_ACTIVE) == 0)
|
|
return;
|
|
|
|
mdelay(1);
|
|
}
|
|
fw_error("Error: DMA context still active (0x%08x)\n", reg);
|
|
}
|
|
|
|
struct driver_data {
|
|
struct fw_packet *packet;
|
|
};
|
|
|
|
/*
|
|
* This function apppends a packet to the DMA queue for transmission.
|
|
* Must always be called with the ochi->lock held to ensure proper
|
|
* generation handling and locking around packet queue manipulation.
|
|
*/
|
|
static int at_context_queue_packet(struct context *ctx,
|
|
struct fw_packet *packet)
|
|
{
|
|
struct fw_ohci *ohci = ctx->ohci;
|
|
dma_addr_t d_bus, uninitialized_var(payload_bus);
|
|
struct driver_data *driver_data;
|
|
struct descriptor *d, *last;
|
|
__le32 *header;
|
|
int z, tcode;
|
|
u32 reg;
|
|
|
|
d = context_get_descriptors(ctx, 4, &d_bus);
|
|
if (d == NULL) {
|
|
packet->ack = RCODE_SEND_ERROR;
|
|
return -1;
|
|
}
|
|
|
|
d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE);
|
|
d[0].res_count = cpu_to_le16(packet->timestamp);
|
|
|
|
/*
|
|
* The DMA format for asyncronous link packets is different
|
|
* from the IEEE1394 layout, so shift the fields around
|
|
* accordingly. If header_length is 8, it's a PHY packet, to
|
|
* which we need to prepend an extra quadlet.
|
|
*/
|
|
|
|
header = (__le32 *) &d[1];
|
|
switch (packet->header_length) {
|
|
case 16:
|
|
case 12:
|
|
header[0] = cpu_to_le32((packet->header[0] & 0xffff) |
|
|
(packet->speed << 16));
|
|
header[1] = cpu_to_le32((packet->header[1] & 0xffff) |
|
|
(packet->header[0] & 0xffff0000));
|
|
header[2] = cpu_to_le32(packet->header[2]);
|
|
|
|
tcode = (packet->header[0] >> 4) & 0x0f;
|
|
if (TCODE_IS_BLOCK_PACKET(tcode))
|
|
header[3] = cpu_to_le32(packet->header[3]);
|
|
else
|
|
header[3] = (__force __le32) packet->header[3];
|
|
|
|
d[0].req_count = cpu_to_le16(packet->header_length);
|
|
break;
|
|
|
|
case 8:
|
|
header[0] = cpu_to_le32((OHCI1394_phy_tcode << 4) |
|
|
(packet->speed << 16));
|
|
header[1] = cpu_to_le32(packet->header[0]);
|
|
header[2] = cpu_to_le32(packet->header[1]);
|
|
d[0].req_count = cpu_to_le16(12);
|
|
break;
|
|
|
|
case 4:
|
|
header[0] = cpu_to_le32((packet->header[0] & 0xffff) |
|
|
(packet->speed << 16));
|
|
header[1] = cpu_to_le32(packet->header[0] & 0xffff0000);
|
|
d[0].req_count = cpu_to_le16(8);
|
|
break;
|
|
|
|
default:
|
|
/* BUG(); */
|
|
packet->ack = RCODE_SEND_ERROR;
|
|
return -1;
|
|
}
|
|
|
|
driver_data = (struct driver_data *) &d[3];
|
|
driver_data->packet = packet;
|
|
packet->driver_data = driver_data;
|
|
|
|
if (packet->payload_length > 0) {
|
|
payload_bus =
|
|
dma_map_single(ohci->card.device, packet->payload,
|
|
packet->payload_length, DMA_TO_DEVICE);
|
|
if (dma_mapping_error(ohci->card.device, payload_bus)) {
|
|
packet->ack = RCODE_SEND_ERROR;
|
|
return -1;
|
|
}
|
|
packet->payload_bus = payload_bus;
|
|
packet->payload_mapped = true;
|
|
|
|
d[2].req_count = cpu_to_le16(packet->payload_length);
|
|
d[2].data_address = cpu_to_le32(payload_bus);
|
|
last = &d[2];
|
|
z = 3;
|
|
} else {
|
|
last = &d[0];
|
|
z = 2;
|
|
}
|
|
|
|
last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST |
|
|
DESCRIPTOR_IRQ_ALWAYS |
|
|
DESCRIPTOR_BRANCH_ALWAYS);
|
|
|
|
/*
|
|
* If the controller and packet generations don't match, we need to
|
|
* bail out and try again. If IntEvent.busReset is set, the AT context
|
|
* is halted, so appending to the context and trying to run it is
|
|
* futile. Most controllers do the right thing and just flush the AT
|
|
* queue (per section 7.2.3.2 of the OHCI 1.1 specification), but
|
|
* some controllers (like a JMicron JMB381 PCI-e) misbehave and wind
|
|
* up stalling out. So we just bail out in software and try again
|
|
* later, and everyone is happy.
|
|
* FIXME: Document how the locking works.
|
|
*/
|
|
if (ohci->generation != packet->generation ||
|
|
reg_read(ohci, OHCI1394_IntEventSet) & OHCI1394_busReset) {
|
|
if (packet->payload_mapped)
|
|
dma_unmap_single(ohci->card.device, payload_bus,
|
|
packet->payload_length, DMA_TO_DEVICE);
|
|
packet->ack = RCODE_GENERATION;
|
|
return -1;
|
|
}
|
|
|
|
context_append(ctx, d, z, 4 - z);
|
|
|
|
/* If the context isn't already running, start it up. */
|
|
reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs));
|
|
if ((reg & CONTEXT_RUN) == 0)
|
|
context_run(ctx, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int handle_at_packet(struct context *context,
|
|
struct descriptor *d,
|
|
struct descriptor *last)
|
|
{
|
|
struct driver_data *driver_data;
|
|
struct fw_packet *packet;
|
|
struct fw_ohci *ohci = context->ohci;
|
|
int evt;
|
|
|
|
if (last->transfer_status == 0)
|
|
/* This descriptor isn't done yet, stop iteration. */
|
|
return 0;
|
|
|
|
driver_data = (struct driver_data *) &d[3];
|
|
packet = driver_data->packet;
|
|
if (packet == NULL)
|
|
/* This packet was cancelled, just continue. */
|
|
return 1;
|
|
|
|
if (packet->payload_mapped)
|
|
dma_unmap_single(ohci->card.device, packet->payload_bus,
|
|
packet->payload_length, DMA_TO_DEVICE);
|
|
|
|
evt = le16_to_cpu(last->transfer_status) & 0x1f;
|
|
packet->timestamp = le16_to_cpu(last->res_count);
|
|
|
|
log_ar_at_event('T', packet->speed, packet->header, evt);
|
|
|
|
switch (evt) {
|
|
case OHCI1394_evt_timeout:
|
|
/* Async response transmit timed out. */
|
|
packet->ack = RCODE_CANCELLED;
|
|
break;
|
|
|
|
case OHCI1394_evt_flushed:
|
|
/*
|
|
* The packet was flushed should give same error as
|
|
* when we try to use a stale generation count.
|
|
*/
|
|
packet->ack = RCODE_GENERATION;
|
|
break;
|
|
|
|
case OHCI1394_evt_missing_ack:
|
|
/*
|
|
* Using a valid (current) generation count, but the
|
|
* node is not on the bus or not sending acks.
|
|
*/
|
|
packet->ack = RCODE_NO_ACK;
|
|
break;
|
|
|
|
case ACK_COMPLETE + 0x10:
|
|
case ACK_PENDING + 0x10:
|
|
case ACK_BUSY_X + 0x10:
|
|
case ACK_BUSY_A + 0x10:
|
|
case ACK_BUSY_B + 0x10:
|
|
case ACK_DATA_ERROR + 0x10:
|
|
case ACK_TYPE_ERROR + 0x10:
|
|
packet->ack = evt - 0x10;
|
|
break;
|
|
|
|
default:
|
|
packet->ack = RCODE_SEND_ERROR;
|
|
break;
|
|
}
|
|
|
|
packet->callback(packet, &ohci->card, packet->ack);
|
|
|
|
return 1;
|
|
}
|
|
|
|
#define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff)
|
|
#define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f)
|
|
#define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff)
|
|
#define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff)
|
|
#define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff)
|
|
|
|
static void handle_local_rom(struct fw_ohci *ohci,
|
|
struct fw_packet *packet, u32 csr)
|
|
{
|
|
struct fw_packet response;
|
|
int tcode, length, i;
|
|
|
|
tcode = HEADER_GET_TCODE(packet->header[0]);
|
|
if (TCODE_IS_BLOCK_PACKET(tcode))
|
|
length = HEADER_GET_DATA_LENGTH(packet->header[3]);
|
|
else
|
|
length = 4;
|
|
|
|
i = csr - CSR_CONFIG_ROM;
|
|
if (i + length > CONFIG_ROM_SIZE) {
|
|
fw_fill_response(&response, packet->header,
|
|
RCODE_ADDRESS_ERROR, NULL, 0);
|
|
} else if (!TCODE_IS_READ_REQUEST(tcode)) {
|
|
fw_fill_response(&response, packet->header,
|
|
RCODE_TYPE_ERROR, NULL, 0);
|
|
} else {
|
|
fw_fill_response(&response, packet->header, RCODE_COMPLETE,
|
|
(void *) ohci->config_rom + i, length);
|
|
}
|
|
|
|
fw_core_handle_response(&ohci->card, &response);
|
|
}
|
|
|
|
static void handle_local_lock(struct fw_ohci *ohci,
|
|
struct fw_packet *packet, u32 csr)
|
|
{
|
|
struct fw_packet response;
|
|
int tcode, length, ext_tcode, sel, try;
|
|
__be32 *payload, lock_old;
|
|
u32 lock_arg, lock_data;
|
|
|
|
tcode = HEADER_GET_TCODE(packet->header[0]);
|
|
length = HEADER_GET_DATA_LENGTH(packet->header[3]);
|
|
payload = packet->payload;
|
|
ext_tcode = HEADER_GET_EXTENDED_TCODE(packet->header[3]);
|
|
|
|
if (tcode == TCODE_LOCK_REQUEST &&
|
|
ext_tcode == EXTCODE_COMPARE_SWAP && length == 8) {
|
|
lock_arg = be32_to_cpu(payload[0]);
|
|
lock_data = be32_to_cpu(payload[1]);
|
|
} else if (tcode == TCODE_READ_QUADLET_REQUEST) {
|
|
lock_arg = 0;
|
|
lock_data = 0;
|
|
} else {
|
|
fw_fill_response(&response, packet->header,
|
|
RCODE_TYPE_ERROR, NULL, 0);
|
|
goto out;
|
|
}
|
|
|
|
sel = (csr - CSR_BUS_MANAGER_ID) / 4;
|
|
reg_write(ohci, OHCI1394_CSRData, lock_data);
|
|
reg_write(ohci, OHCI1394_CSRCompareData, lock_arg);
|
|
reg_write(ohci, OHCI1394_CSRControl, sel);
|
|
|
|
for (try = 0; try < 20; try++)
|
|
if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) {
|
|
lock_old = cpu_to_be32(reg_read(ohci,
|
|
OHCI1394_CSRData));
|
|
fw_fill_response(&response, packet->header,
|
|
RCODE_COMPLETE,
|
|
&lock_old, sizeof(lock_old));
|
|
goto out;
|
|
}
|
|
|
|
fw_error("swap not done (CSR lock timeout)\n");
|
|
fw_fill_response(&response, packet->header, RCODE_BUSY, NULL, 0);
|
|
|
|
out:
|
|
fw_core_handle_response(&ohci->card, &response);
|
|
}
|
|
|
|
static void handle_local_request(struct context *ctx, struct fw_packet *packet)
|
|
{
|
|
u64 offset, csr;
|
|
|
|
if (ctx == &ctx->ohci->at_request_ctx) {
|
|
packet->ack = ACK_PENDING;
|
|
packet->callback(packet, &ctx->ohci->card, packet->ack);
|
|
}
|
|
|
|
offset =
|
|
((unsigned long long)
|
|
HEADER_GET_OFFSET_HIGH(packet->header[1]) << 32) |
|
|
packet->header[2];
|
|
csr = offset - CSR_REGISTER_BASE;
|
|
|
|
/* Handle config rom reads. */
|
|
if (csr >= CSR_CONFIG_ROM && csr < CSR_CONFIG_ROM_END)
|
|
handle_local_rom(ctx->ohci, packet, csr);
|
|
else switch (csr) {
|
|
case CSR_BUS_MANAGER_ID:
|
|
case CSR_BANDWIDTH_AVAILABLE:
|
|
case CSR_CHANNELS_AVAILABLE_HI:
|
|
case CSR_CHANNELS_AVAILABLE_LO:
|
|
handle_local_lock(ctx->ohci, packet, csr);
|
|
break;
|
|
default:
|
|
if (ctx == &ctx->ohci->at_request_ctx)
|
|
fw_core_handle_request(&ctx->ohci->card, packet);
|
|
else
|
|
fw_core_handle_response(&ctx->ohci->card, packet);
|
|
break;
|
|
}
|
|
|
|
if (ctx == &ctx->ohci->at_response_ctx) {
|
|
packet->ack = ACK_COMPLETE;
|
|
packet->callback(packet, &ctx->ohci->card, packet->ack);
|
|
}
|
|
}
|
|
|
|
static void at_context_transmit(struct context *ctx, struct fw_packet *packet)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&ctx->ohci->lock, flags);
|
|
|
|
if (HEADER_GET_DESTINATION(packet->header[0]) == ctx->ohci->node_id &&
|
|
ctx->ohci->generation == packet->generation) {
|
|
spin_unlock_irqrestore(&ctx->ohci->lock, flags);
|
|
handle_local_request(ctx, packet);
|
|
return;
|
|
}
|
|
|
|
ret = at_context_queue_packet(ctx, packet);
|
|
spin_unlock_irqrestore(&ctx->ohci->lock, flags);
|
|
|
|
if (ret < 0)
|
|
packet->callback(packet, &ctx->ohci->card, packet->ack);
|
|
|
|
}
|
|
|
|
static void bus_reset_tasklet(unsigned long data)
|
|
{
|
|
struct fw_ohci *ohci = (struct fw_ohci *)data;
|
|
int self_id_count, i, j, reg;
|
|
int generation, new_generation;
|
|
unsigned long flags;
|
|
void *free_rom = NULL;
|
|
dma_addr_t free_rom_bus = 0;
|
|
|
|
reg = reg_read(ohci, OHCI1394_NodeID);
|
|
if (!(reg & OHCI1394_NodeID_idValid)) {
|
|
fw_notify("node ID not valid, new bus reset in progress\n");
|
|
return;
|
|
}
|
|
if ((reg & OHCI1394_NodeID_nodeNumber) == 63) {
|
|
fw_notify("malconfigured bus\n");
|
|
return;
|
|
}
|
|
ohci->node_id = reg & (OHCI1394_NodeID_busNumber |
|
|
OHCI1394_NodeID_nodeNumber);
|
|
|
|
reg = reg_read(ohci, OHCI1394_SelfIDCount);
|
|
if (reg & OHCI1394_SelfIDCount_selfIDError) {
|
|
fw_notify("inconsistent self IDs\n");
|
|
return;
|
|
}
|
|
/*
|
|
* The count in the SelfIDCount register is the number of
|
|
* bytes in the self ID receive buffer. Since we also receive
|
|
* the inverted quadlets and a header quadlet, we shift one
|
|
* bit extra to get the actual number of self IDs.
|
|
*/
|
|
self_id_count = (reg >> 3) & 0xff;
|
|
if (self_id_count == 0 || self_id_count > 252) {
|
|
fw_notify("inconsistent self IDs\n");
|
|
return;
|
|
}
|
|
generation = (cond_le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff;
|
|
rmb();
|
|
|
|
for (i = 1, j = 0; j < self_id_count; i += 2, j++) {
|
|
if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) {
|
|
fw_notify("inconsistent self IDs\n");
|
|
return;
|
|
}
|
|
ohci->self_id_buffer[j] =
|
|
cond_le32_to_cpu(ohci->self_id_cpu[i]);
|
|
}
|
|
rmb();
|
|
|
|
/*
|
|
* Check the consistency of the self IDs we just read. The
|
|
* problem we face is that a new bus reset can start while we
|
|
* read out the self IDs from the DMA buffer. If this happens,
|
|
* the DMA buffer will be overwritten with new self IDs and we
|
|
* will read out inconsistent data. The OHCI specification
|
|
* (section 11.2) recommends a technique similar to
|
|
* linux/seqlock.h, where we remember the generation of the
|
|
* self IDs in the buffer before reading them out and compare
|
|
* it to the current generation after reading them out. If
|
|
* the two generations match we know we have a consistent set
|
|
* of self IDs.
|
|
*/
|
|
|
|
new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff;
|
|
if (new_generation != generation) {
|
|
fw_notify("recursive bus reset detected, "
|
|
"discarding self ids\n");
|
|
return;
|
|
}
|
|
|
|
/* FIXME: Document how the locking works. */
|
|
spin_lock_irqsave(&ohci->lock, flags);
|
|
|
|
ohci->generation = generation;
|
|
context_stop(&ohci->at_request_ctx);
|
|
context_stop(&ohci->at_response_ctx);
|
|
reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset);
|
|
|
|
if (ohci->quirks & QUIRK_RESET_PACKET)
|
|
ohci->request_generation = generation;
|
|
|
|
/*
|
|
* This next bit is unrelated to the AT context stuff but we
|
|
* have to do it under the spinlock also. If a new config rom
|
|
* was set up before this reset, the old one is now no longer
|
|
* in use and we can free it. Update the config rom pointers
|
|
* to point to the current config rom and clear the
|
|
* next_config_rom pointer so a new update can take place.
|
|
*/
|
|
|
|
if (ohci->next_config_rom != NULL) {
|
|
if (ohci->next_config_rom != ohci->config_rom) {
|
|
free_rom = ohci->config_rom;
|
|
free_rom_bus = ohci->config_rom_bus;
|
|
}
|
|
ohci->config_rom = ohci->next_config_rom;
|
|
ohci->config_rom_bus = ohci->next_config_rom_bus;
|
|
ohci->next_config_rom = NULL;
|
|
|
|
/*
|
|
* Restore config_rom image and manually update
|
|
* config_rom registers. Writing the header quadlet
|
|
* will indicate that the config rom is ready, so we
|
|
* do that last.
|
|
*/
|
|
reg_write(ohci, OHCI1394_BusOptions,
|
|
be32_to_cpu(ohci->config_rom[2]));
|
|
ohci->config_rom[0] = ohci->next_header;
|
|
reg_write(ohci, OHCI1394_ConfigROMhdr,
|
|
be32_to_cpu(ohci->next_header));
|
|
}
|
|
|
|
#ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA
|
|
reg_write(ohci, OHCI1394_PhyReqFilterHiSet, ~0);
|
|
reg_write(ohci, OHCI1394_PhyReqFilterLoSet, ~0);
|
|
#endif
|
|
|
|
spin_unlock_irqrestore(&ohci->lock, flags);
|
|
|
|
if (free_rom)
|
|
dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
|
|
free_rom, free_rom_bus);
|
|
|
|
log_selfids(ohci->node_id, generation,
|
|
self_id_count, ohci->self_id_buffer);
|
|
|
|
fw_core_handle_bus_reset(&ohci->card, ohci->node_id, generation,
|
|
self_id_count, ohci->self_id_buffer);
|
|
}
|
|
|
|
static irqreturn_t irq_handler(int irq, void *data)
|
|
{
|
|
struct fw_ohci *ohci = data;
|
|
u32 event, iso_event;
|
|
int i;
|
|
|
|
event = reg_read(ohci, OHCI1394_IntEventClear);
|
|
|
|
if (!event || !~event)
|
|
return IRQ_NONE;
|
|
|
|
/* busReset must not be cleared yet, see OHCI 1.1 clause 7.2.3.2 */
|
|
reg_write(ohci, OHCI1394_IntEventClear, event & ~OHCI1394_busReset);
|
|
log_irqs(event);
|
|
|
|
if (event & OHCI1394_selfIDComplete)
|
|
tasklet_schedule(&ohci->bus_reset_tasklet);
|
|
|
|
if (event & OHCI1394_RQPkt)
|
|
tasklet_schedule(&ohci->ar_request_ctx.tasklet);
|
|
|
|
if (event & OHCI1394_RSPkt)
|
|
tasklet_schedule(&ohci->ar_response_ctx.tasklet);
|
|
|
|
if (event & OHCI1394_reqTxComplete)
|
|
tasklet_schedule(&ohci->at_request_ctx.tasklet);
|
|
|
|
if (event & OHCI1394_respTxComplete)
|
|
tasklet_schedule(&ohci->at_response_ctx.tasklet);
|
|
|
|
iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventClear);
|
|
reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event);
|
|
|
|
while (iso_event) {
|
|
i = ffs(iso_event) - 1;
|
|
tasklet_schedule(&ohci->ir_context_list[i].context.tasklet);
|
|
iso_event &= ~(1 << i);
|
|
}
|
|
|
|
iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventClear);
|
|
reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event);
|
|
|
|
while (iso_event) {
|
|
i = ffs(iso_event) - 1;
|
|
tasklet_schedule(&ohci->it_context_list[i].context.tasklet);
|
|
iso_event &= ~(1 << i);
|
|
}
|
|
|
|
if (unlikely(event & OHCI1394_regAccessFail))
|
|
fw_error("Register access failure - "
|
|
"please notify linux1394-devel@lists.sf.net\n");
|
|
|
|
if (unlikely(event & OHCI1394_postedWriteErr))
|
|
fw_error("PCI posted write error\n");
|
|
|
|
if (unlikely(event & OHCI1394_cycleTooLong)) {
|
|
if (printk_ratelimit())
|
|
fw_notify("isochronous cycle too long\n");
|
|
reg_write(ohci, OHCI1394_LinkControlSet,
|
|
OHCI1394_LinkControl_cycleMaster);
|
|
}
|
|
|
|
if (unlikely(event & OHCI1394_cycleInconsistent)) {
|
|
/*
|
|
* We need to clear this event bit in order to make
|
|
* cycleMatch isochronous I/O work. In theory we should
|
|
* stop active cycleMatch iso contexts now and restart
|
|
* them at least two cycles later. (FIXME?)
|
|
*/
|
|
if (printk_ratelimit())
|
|
fw_notify("isochronous cycle inconsistent\n");
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int software_reset(struct fw_ohci *ohci)
|
|
{
|
|
int i;
|
|
|
|
reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset);
|
|
|
|
for (i = 0; i < OHCI_LOOP_COUNT; i++) {
|
|
if ((reg_read(ohci, OHCI1394_HCControlSet) &
|
|
OHCI1394_HCControl_softReset) == 0)
|
|
return 0;
|
|
msleep(1);
|
|
}
|
|
|
|
return -EBUSY;
|
|
}
|
|
|
|
static void copy_config_rom(__be32 *dest, const __be32 *src, size_t length)
|
|
{
|
|
size_t size = length * 4;
|
|
|
|
memcpy(dest, src, size);
|
|
if (size < CONFIG_ROM_SIZE)
|
|
memset(&dest[length], 0, CONFIG_ROM_SIZE - size);
|
|
}
|
|
|
|
static int ohci_enable(struct fw_card *card,
|
|
const __be32 *config_rom, size_t length)
|
|
{
|
|
struct fw_ohci *ohci = fw_ohci(card);
|
|
struct pci_dev *dev = to_pci_dev(card->device);
|
|
u32 lps;
|
|
int i;
|
|
|
|
if (software_reset(ohci)) {
|
|
fw_error("Failed to reset ohci card.\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
/*
|
|
* Now enable LPS, which we need in order to start accessing
|
|
* most of the registers. In fact, on some cards (ALI M5251),
|
|
* accessing registers in the SClk domain without LPS enabled
|
|
* will lock up the machine. Wait 50msec to make sure we have
|
|
* full link enabled. However, with some cards (well, at least
|
|
* a JMicron PCIe card), we have to try again sometimes.
|
|
*/
|
|
reg_write(ohci, OHCI1394_HCControlSet,
|
|
OHCI1394_HCControl_LPS |
|
|
OHCI1394_HCControl_postedWriteEnable);
|
|
flush_writes(ohci);
|
|
|
|
for (lps = 0, i = 0; !lps && i < 3; i++) {
|
|
msleep(50);
|
|
lps = reg_read(ohci, OHCI1394_HCControlSet) &
|
|
OHCI1394_HCControl_LPS;
|
|
}
|
|
|
|
if (!lps) {
|
|
fw_error("Failed to set Link Power Status\n");
|
|
return -EIO;
|
|
}
|
|
|
|
reg_write(ohci, OHCI1394_HCControlClear,
|
|
OHCI1394_HCControl_noByteSwapData);
|
|
|
|
reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus);
|
|
reg_write(ohci, OHCI1394_LinkControlClear,
|
|
OHCI1394_LinkControl_rcvPhyPkt);
|
|
reg_write(ohci, OHCI1394_LinkControlSet,
|
|
OHCI1394_LinkControl_rcvSelfID |
|
|
OHCI1394_LinkControl_cycleTimerEnable |
|
|
OHCI1394_LinkControl_cycleMaster);
|
|
|
|
reg_write(ohci, OHCI1394_ATRetries,
|
|
OHCI1394_MAX_AT_REQ_RETRIES |
|
|
(OHCI1394_MAX_AT_RESP_RETRIES << 4) |
|
|
(OHCI1394_MAX_PHYS_RESP_RETRIES << 8));
|
|
|
|
ar_context_run(&ohci->ar_request_ctx);
|
|
ar_context_run(&ohci->ar_response_ctx);
|
|
|
|
reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000);
|
|
reg_write(ohci, OHCI1394_IntEventClear, ~0);
|
|
reg_write(ohci, OHCI1394_IntMaskClear, ~0);
|
|
reg_write(ohci, OHCI1394_IntMaskSet,
|
|
OHCI1394_selfIDComplete |
|
|
OHCI1394_RQPkt | OHCI1394_RSPkt |
|
|
OHCI1394_reqTxComplete | OHCI1394_respTxComplete |
|
|
OHCI1394_isochRx | OHCI1394_isochTx |
|
|
OHCI1394_postedWriteErr | OHCI1394_cycleTooLong |
|
|
OHCI1394_cycleInconsistent | OHCI1394_regAccessFail |
|
|
OHCI1394_masterIntEnable);
|
|
if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS)
|
|
reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_busReset);
|
|
|
|
/* Activate link_on bit and contender bit in our self ID packets.*/
|
|
if (ohci_update_phy_reg(card, 4, 0,
|
|
PHY_LINK_ACTIVE | PHY_CONTENDER) < 0)
|
|
return -EIO;
|
|
|
|
/*
|
|
* When the link is not yet enabled, the atomic config rom
|
|
* update mechanism described below in ohci_set_config_rom()
|
|
* is not active. We have to update ConfigRomHeader and
|
|
* BusOptions manually, and the write to ConfigROMmap takes
|
|
* effect immediately. We tie this to the enabling of the
|
|
* link, so we have a valid config rom before enabling - the
|
|
* OHCI requires that ConfigROMhdr and BusOptions have valid
|
|
* values before enabling.
|
|
*
|
|
* However, when the ConfigROMmap is written, some controllers
|
|
* always read back quadlets 0 and 2 from the config rom to
|
|
* the ConfigRomHeader and BusOptions registers on bus reset.
|
|
* They shouldn't do that in this initial case where the link
|
|
* isn't enabled. This means we have to use the same
|
|
* workaround here, setting the bus header to 0 and then write
|
|
* the right values in the bus reset tasklet.
|
|
*/
|
|
|
|
if (config_rom) {
|
|
ohci->next_config_rom =
|
|
dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE,
|
|
&ohci->next_config_rom_bus,
|
|
GFP_KERNEL);
|
|
if (ohci->next_config_rom == NULL)
|
|
return -ENOMEM;
|
|
|
|
copy_config_rom(ohci->next_config_rom, config_rom, length);
|
|
} else {
|
|
/*
|
|
* In the suspend case, config_rom is NULL, which
|
|
* means that we just reuse the old config rom.
|
|
*/
|
|
ohci->next_config_rom = ohci->config_rom;
|
|
ohci->next_config_rom_bus = ohci->config_rom_bus;
|
|
}
|
|
|
|
ohci->next_header = ohci->next_config_rom[0];
|
|
ohci->next_config_rom[0] = 0;
|
|
reg_write(ohci, OHCI1394_ConfigROMhdr, 0);
|
|
reg_write(ohci, OHCI1394_BusOptions,
|
|
be32_to_cpu(ohci->next_config_rom[2]));
|
|
reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus);
|
|
|
|
reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000);
|
|
|
|
if (request_irq(dev->irq, irq_handler,
|
|
IRQF_SHARED, ohci_driver_name, ohci)) {
|
|
fw_error("Failed to allocate shared interrupt %d.\n",
|
|
dev->irq);
|
|
dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
|
|
ohci->config_rom, ohci->config_rom_bus);
|
|
return -EIO;
|
|
}
|
|
|
|
reg_write(ohci, OHCI1394_HCControlSet,
|
|
OHCI1394_HCControl_linkEnable |
|
|
OHCI1394_HCControl_BIBimageValid);
|
|
flush_writes(ohci);
|
|
|
|
/*
|
|
* We are ready to go, initiate bus reset to finish the
|
|
* initialization.
|
|
*/
|
|
|
|
fw_core_initiate_bus_reset(&ohci->card, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ohci_set_config_rom(struct fw_card *card,
|
|
const __be32 *config_rom, size_t length)
|
|
{
|
|
struct fw_ohci *ohci;
|
|
unsigned long flags;
|
|
int ret = -EBUSY;
|
|
__be32 *next_config_rom;
|
|
dma_addr_t uninitialized_var(next_config_rom_bus);
|
|
|
|
ohci = fw_ohci(card);
|
|
|
|
/*
|
|
* When the OHCI controller is enabled, the config rom update
|
|
* mechanism is a bit tricky, but easy enough to use. See
|
|
* section 5.5.6 in the OHCI specification.
|
|
*
|
|
* The OHCI controller caches the new config rom address in a
|
|
* shadow register (ConfigROMmapNext) and needs a bus reset
|
|
* for the changes to take place. When the bus reset is
|
|
* detected, the controller loads the new values for the
|
|
* ConfigRomHeader and BusOptions registers from the specified
|
|
* config rom and loads ConfigROMmap from the ConfigROMmapNext
|
|
* shadow register. All automatically and atomically.
|
|
*
|
|
* Now, there's a twist to this story. The automatic load of
|
|
* ConfigRomHeader and BusOptions doesn't honor the
|
|
* noByteSwapData bit, so with a be32 config rom, the
|
|
* controller will load be32 values in to these registers
|
|
* during the atomic update, even on litte endian
|
|
* architectures. The workaround we use is to put a 0 in the
|
|
* header quadlet; 0 is endian agnostic and means that the
|
|
* config rom isn't ready yet. In the bus reset tasklet we
|
|
* then set up the real values for the two registers.
|
|
*
|
|
* We use ohci->lock to avoid racing with the code that sets
|
|
* ohci->next_config_rom to NULL (see bus_reset_tasklet).
|
|
*/
|
|
|
|
next_config_rom =
|
|
dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE,
|
|
&next_config_rom_bus, GFP_KERNEL);
|
|
if (next_config_rom == NULL)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_irqsave(&ohci->lock, flags);
|
|
|
|
if (ohci->next_config_rom == NULL) {
|
|
ohci->next_config_rom = next_config_rom;
|
|
ohci->next_config_rom_bus = next_config_rom_bus;
|
|
|
|
copy_config_rom(ohci->next_config_rom, config_rom, length);
|
|
|
|
ohci->next_header = config_rom[0];
|
|
ohci->next_config_rom[0] = 0;
|
|
|
|
reg_write(ohci, OHCI1394_ConfigROMmap,
|
|
ohci->next_config_rom_bus);
|
|
ret = 0;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&ohci->lock, flags);
|
|
|
|
/*
|
|
* Now initiate a bus reset to have the changes take
|
|
* effect. We clean up the old config rom memory and DMA
|
|
* mappings in the bus reset tasklet, since the OHCI
|
|
* controller could need to access it before the bus reset
|
|
* takes effect.
|
|
*/
|
|
if (ret == 0)
|
|
fw_core_initiate_bus_reset(&ohci->card, 1);
|
|
else
|
|
dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
|
|
next_config_rom, next_config_rom_bus);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void ohci_send_request(struct fw_card *card, struct fw_packet *packet)
|
|
{
|
|
struct fw_ohci *ohci = fw_ohci(card);
|
|
|
|
at_context_transmit(&ohci->at_request_ctx, packet);
|
|
}
|
|
|
|
static void ohci_send_response(struct fw_card *card, struct fw_packet *packet)
|
|
{
|
|
struct fw_ohci *ohci = fw_ohci(card);
|
|
|
|
at_context_transmit(&ohci->at_response_ctx, packet);
|
|
}
|
|
|
|
static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet)
|
|
{
|
|
struct fw_ohci *ohci = fw_ohci(card);
|
|
struct context *ctx = &ohci->at_request_ctx;
|
|
struct driver_data *driver_data = packet->driver_data;
|
|
int ret = -ENOENT;
|
|
|
|
tasklet_disable(&ctx->tasklet);
|
|
|
|
if (packet->ack != 0)
|
|
goto out;
|
|
|
|
if (packet->payload_mapped)
|
|
dma_unmap_single(ohci->card.device, packet->payload_bus,
|
|
packet->payload_length, DMA_TO_DEVICE);
|
|
|
|
log_ar_at_event('T', packet->speed, packet->header, 0x20);
|
|
driver_data->packet = NULL;
|
|
packet->ack = RCODE_CANCELLED;
|
|
packet->callback(packet, &ohci->card, packet->ack);
|
|
ret = 0;
|
|
out:
|
|
tasklet_enable(&ctx->tasklet);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ohci_enable_phys_dma(struct fw_card *card,
|
|
int node_id, int generation)
|
|
{
|
|
#ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA
|
|
return 0;
|
|
#else
|
|
struct fw_ohci *ohci = fw_ohci(card);
|
|
unsigned long flags;
|
|
int n, ret = 0;
|
|
|
|
/*
|
|
* FIXME: Make sure this bitmask is cleared when we clear the busReset
|
|
* interrupt bit. Clear physReqResourceAllBuses on bus reset.
|
|
*/
|
|
|
|
spin_lock_irqsave(&ohci->lock, flags);
|
|
|
|
if (ohci->generation != generation) {
|
|
ret = -ESTALE;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Note, if the node ID contains a non-local bus ID, physical DMA is
|
|
* enabled for _all_ nodes on remote buses.
|
|
*/
|
|
|
|
n = (node_id & 0xffc0) == LOCAL_BUS ? node_id & 0x3f : 63;
|
|
if (n < 32)
|
|
reg_write(ohci, OHCI1394_PhyReqFilterLoSet, 1 << n);
|
|
else
|
|
reg_write(ohci, OHCI1394_PhyReqFilterHiSet, 1 << (n - 32));
|
|
|
|
flush_writes(ohci);
|
|
out:
|
|
spin_unlock_irqrestore(&ohci->lock, flags);
|
|
|
|
return ret;
|
|
#endif /* CONFIG_FIREWIRE_OHCI_REMOTE_DMA */
|
|
}
|
|
|
|
static u32 cycle_timer_ticks(u32 cycle_timer)
|
|
{
|
|
u32 ticks;
|
|
|
|
ticks = cycle_timer & 0xfff;
|
|
ticks += 3072 * ((cycle_timer >> 12) & 0x1fff);
|
|
ticks += (3072 * 8000) * (cycle_timer >> 25);
|
|
|
|
return ticks;
|
|
}
|
|
|
|
/*
|
|
* Some controllers exhibit one or more of the following bugs when updating the
|
|
* iso cycle timer register:
|
|
* - When the lowest six bits are wrapping around to zero, a read that happens
|
|
* at the same time will return garbage in the lowest ten bits.
|
|
* - When the cycleOffset field wraps around to zero, the cycleCount field is
|
|
* not incremented for about 60 ns.
|
|
* - Occasionally, the entire register reads zero.
|
|
*
|
|
* To catch these, we read the register three times and ensure that the
|
|
* difference between each two consecutive reads is approximately the same, i.e.
|
|
* less than twice the other. Furthermore, any negative difference indicates an
|
|
* error. (A PCI read should take at least 20 ticks of the 24.576 MHz timer to
|
|
* execute, so we have enough precision to compute the ratio of the differences.)
|
|
*/
|
|
static u32 ohci_get_cycle_time(struct fw_card *card)
|
|
{
|
|
struct fw_ohci *ohci = fw_ohci(card);
|
|
u32 c0, c1, c2;
|
|
u32 t0, t1, t2;
|
|
s32 diff01, diff12;
|
|
int i;
|
|
|
|
c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
|
|
|
|
if (ohci->quirks & QUIRK_CYCLE_TIMER) {
|
|
i = 0;
|
|
c1 = c2;
|
|
c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
|
|
do {
|
|
c0 = c1;
|
|
c1 = c2;
|
|
c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
|
|
t0 = cycle_timer_ticks(c0);
|
|
t1 = cycle_timer_ticks(c1);
|
|
t2 = cycle_timer_ticks(c2);
|
|
diff01 = t1 - t0;
|
|
diff12 = t2 - t1;
|
|
} while ((diff01 <= 0 || diff12 <= 0 ||
|
|
diff01 / diff12 >= 2 || diff12 / diff01 >= 2)
|
|
&& i++ < 20);
|
|
}
|
|
|
|
return c2;
|
|
}
|
|
|
|
static void copy_iso_headers(struct iso_context *ctx, void *p)
|
|
{
|
|
int i = ctx->header_length;
|
|
|
|
if (i + ctx->base.header_size > PAGE_SIZE)
|
|
return;
|
|
|
|
/*
|
|
* The iso header is byteswapped to little endian by
|
|
* the controller, but the remaining header quadlets
|
|
* are big endian. We want to present all the headers
|
|
* as big endian, so we have to swap the first quadlet.
|
|
*/
|
|
if (ctx->base.header_size > 0)
|
|
*(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4));
|
|
if (ctx->base.header_size > 4)
|
|
*(u32 *) (ctx->header + i + 4) = __swab32(*(u32 *) p);
|
|
if (ctx->base.header_size > 8)
|
|
memcpy(ctx->header + i + 8, p + 8, ctx->base.header_size - 8);
|
|
ctx->header_length += ctx->base.header_size;
|
|
}
|
|
|
|
static int handle_ir_packet_per_buffer(struct context *context,
|
|
struct descriptor *d,
|
|
struct descriptor *last)
|
|
{
|
|
struct iso_context *ctx =
|
|
container_of(context, struct iso_context, context);
|
|
struct descriptor *pd;
|
|
__le32 *ir_header;
|
|
void *p;
|
|
|
|
for (pd = d; pd <= last; pd++) {
|
|
if (pd->transfer_status)
|
|
break;
|
|
}
|
|
if (pd > last)
|
|
/* Descriptor(s) not done yet, stop iteration */
|
|
return 0;
|
|
|
|
p = last + 1;
|
|
copy_iso_headers(ctx, p);
|
|
|
|
if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) {
|
|
ir_header = (__le32 *) p;
|
|
ctx->base.callback(&ctx->base,
|
|
le32_to_cpu(ir_header[0]) & 0xffff,
|
|
ctx->header_length, ctx->header,
|
|
ctx->base.callback_data);
|
|
ctx->header_length = 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int handle_it_packet(struct context *context,
|
|
struct descriptor *d,
|
|
struct descriptor *last)
|
|
{
|
|
struct iso_context *ctx =
|
|
container_of(context, struct iso_context, context);
|
|
int i;
|
|
struct descriptor *pd;
|
|
|
|
for (pd = d; pd <= last; pd++)
|
|
if (pd->transfer_status)
|
|
break;
|
|
if (pd > last)
|
|
/* Descriptor(s) not done yet, stop iteration */
|
|
return 0;
|
|
|
|
i = ctx->header_length;
|
|
if (i + 4 < PAGE_SIZE) {
|
|
/* Present this value as big-endian to match the receive code */
|
|
*(__be32 *)(ctx->header + i) = cpu_to_be32(
|
|
((u32)le16_to_cpu(pd->transfer_status) << 16) |
|
|
le16_to_cpu(pd->res_count));
|
|
ctx->header_length += 4;
|
|
}
|
|
if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) {
|
|
ctx->base.callback(&ctx->base, le16_to_cpu(last->res_count),
|
|
ctx->header_length, ctx->header,
|
|
ctx->base.callback_data);
|
|
ctx->header_length = 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card,
|
|
int type, int channel, size_t header_size)
|
|
{
|
|
struct fw_ohci *ohci = fw_ohci(card);
|
|
struct iso_context *ctx, *list;
|
|
descriptor_callback_t callback;
|
|
u64 *channels, dont_care = ~0ULL;
|
|
u32 *mask, regs;
|
|
unsigned long flags;
|
|
int index, ret = -ENOMEM;
|
|
|
|
if (type == FW_ISO_CONTEXT_TRANSMIT) {
|
|
channels = &dont_care;
|
|
mask = &ohci->it_context_mask;
|
|
list = ohci->it_context_list;
|
|
callback = handle_it_packet;
|
|
} else {
|
|
channels = &ohci->ir_context_channels;
|
|
mask = &ohci->ir_context_mask;
|
|
list = ohci->ir_context_list;
|
|
callback = handle_ir_packet_per_buffer;
|
|
}
|
|
|
|
spin_lock_irqsave(&ohci->lock, flags);
|
|
index = *channels & 1ULL << channel ? ffs(*mask) - 1 : -1;
|
|
if (index >= 0) {
|
|
*channels &= ~(1ULL << channel);
|
|
*mask &= ~(1 << index);
|
|
}
|
|
spin_unlock_irqrestore(&ohci->lock, flags);
|
|
|
|
if (index < 0)
|
|
return ERR_PTR(-EBUSY);
|
|
|
|
if (type == FW_ISO_CONTEXT_TRANSMIT)
|
|
regs = OHCI1394_IsoXmitContextBase(index);
|
|
else
|
|
regs = OHCI1394_IsoRcvContextBase(index);
|
|
|
|
ctx = &list[index];
|
|
memset(ctx, 0, sizeof(*ctx));
|
|
ctx->header_length = 0;
|
|
ctx->header = (void *) __get_free_page(GFP_KERNEL);
|
|
if (ctx->header == NULL)
|
|
goto out;
|
|
|
|
ret = context_init(&ctx->context, ohci, regs, callback);
|
|
if (ret < 0)
|
|
goto out_with_header;
|
|
|
|
return &ctx->base;
|
|
|
|
out_with_header:
|
|
free_page((unsigned long)ctx->header);
|
|
out:
|
|
spin_lock_irqsave(&ohci->lock, flags);
|
|
*mask |= 1 << index;
|
|
spin_unlock_irqrestore(&ohci->lock, flags);
|
|
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static int ohci_start_iso(struct fw_iso_context *base,
|
|
s32 cycle, u32 sync, u32 tags)
|
|
{
|
|
struct iso_context *ctx = container_of(base, struct iso_context, base);
|
|
struct fw_ohci *ohci = ctx->context.ohci;
|
|
u32 control, match;
|
|
int index;
|
|
|
|
if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
|
|
index = ctx - ohci->it_context_list;
|
|
match = 0;
|
|
if (cycle >= 0)
|
|
match = IT_CONTEXT_CYCLE_MATCH_ENABLE |
|
|
(cycle & 0x7fff) << 16;
|
|
|
|
reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 1 << index);
|
|
reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index);
|
|
context_run(&ctx->context, match);
|
|
} else {
|
|
index = ctx - ohci->ir_context_list;
|
|
control = IR_CONTEXT_ISOCH_HEADER;
|
|
match = (tags << 28) | (sync << 8) | ctx->base.channel;
|
|
if (cycle >= 0) {
|
|
match |= (cycle & 0x07fff) << 12;
|
|
control |= IR_CONTEXT_CYCLE_MATCH_ENABLE;
|
|
}
|
|
|
|
reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index);
|
|
reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index);
|
|
reg_write(ohci, CONTEXT_MATCH(ctx->context.regs), match);
|
|
context_run(&ctx->context, control);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ohci_stop_iso(struct fw_iso_context *base)
|
|
{
|
|
struct fw_ohci *ohci = fw_ohci(base->card);
|
|
struct iso_context *ctx = container_of(base, struct iso_context, base);
|
|
int index;
|
|
|
|
if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
|
|
index = ctx - ohci->it_context_list;
|
|
reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index);
|
|
} else {
|
|
index = ctx - ohci->ir_context_list;
|
|
reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index);
|
|
}
|
|
flush_writes(ohci);
|
|
context_stop(&ctx->context);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ohci_free_iso_context(struct fw_iso_context *base)
|
|
{
|
|
struct fw_ohci *ohci = fw_ohci(base->card);
|
|
struct iso_context *ctx = container_of(base, struct iso_context, base);
|
|
unsigned long flags;
|
|
int index;
|
|
|
|
ohci_stop_iso(base);
|
|
context_release(&ctx->context);
|
|
free_page((unsigned long)ctx->header);
|
|
|
|
spin_lock_irqsave(&ohci->lock, flags);
|
|
|
|
if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
|
|
index = ctx - ohci->it_context_list;
|
|
ohci->it_context_mask |= 1 << index;
|
|
} else {
|
|
index = ctx - ohci->ir_context_list;
|
|
ohci->ir_context_mask |= 1 << index;
|
|
ohci->ir_context_channels |= 1ULL << base->channel;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&ohci->lock, flags);
|
|
}
|
|
|
|
static int ohci_queue_iso_transmit(struct fw_iso_context *base,
|
|
struct fw_iso_packet *packet,
|
|
struct fw_iso_buffer *buffer,
|
|
unsigned long payload)
|
|
{
|
|
struct iso_context *ctx = container_of(base, struct iso_context, base);
|
|
struct descriptor *d, *last, *pd;
|
|
struct fw_iso_packet *p;
|
|
__le32 *header;
|
|
dma_addr_t d_bus, page_bus;
|
|
u32 z, header_z, payload_z, irq;
|
|
u32 payload_index, payload_end_index, next_page_index;
|
|
int page, end_page, i, length, offset;
|
|
|
|
p = packet;
|
|
payload_index = payload;
|
|
|
|
if (p->skip)
|
|
z = 1;
|
|
else
|
|
z = 2;
|
|
if (p->header_length > 0)
|
|
z++;
|
|
|
|
/* Determine the first page the payload isn't contained in. */
|
|
end_page = PAGE_ALIGN(payload_index + p->payload_length) >> PAGE_SHIFT;
|
|
if (p->payload_length > 0)
|
|
payload_z = end_page - (payload_index >> PAGE_SHIFT);
|
|
else
|
|
payload_z = 0;
|
|
|
|
z += payload_z;
|
|
|
|
/* Get header size in number of descriptors. */
|
|
header_z = DIV_ROUND_UP(p->header_length, sizeof(*d));
|
|
|
|
d = context_get_descriptors(&ctx->context, z + header_z, &d_bus);
|
|
if (d == NULL)
|
|
return -ENOMEM;
|
|
|
|
if (!p->skip) {
|
|
d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE);
|
|
d[0].req_count = cpu_to_le16(8);
|
|
/*
|
|
* Link the skip address to this descriptor itself. This causes
|
|
* a context to skip a cycle whenever lost cycles or FIFO
|
|
* overruns occur, without dropping the data. The application
|
|
* should then decide whether this is an error condition or not.
|
|
* FIXME: Make the context's cycle-lost behaviour configurable?
|
|
*/
|
|
d[0].branch_address = cpu_to_le32(d_bus | z);
|
|
|
|
header = (__le32 *) &d[1];
|
|
header[0] = cpu_to_le32(IT_HEADER_SY(p->sy) |
|
|
IT_HEADER_TAG(p->tag) |
|
|
IT_HEADER_TCODE(TCODE_STREAM_DATA) |
|
|
IT_HEADER_CHANNEL(ctx->base.channel) |
|
|
IT_HEADER_SPEED(ctx->base.speed));
|
|
header[1] =
|
|
cpu_to_le32(IT_HEADER_DATA_LENGTH(p->header_length +
|
|
p->payload_length));
|
|
}
|
|
|
|
if (p->header_length > 0) {
|
|
d[2].req_count = cpu_to_le16(p->header_length);
|
|
d[2].data_address = cpu_to_le32(d_bus + z * sizeof(*d));
|
|
memcpy(&d[z], p->header, p->header_length);
|
|
}
|
|
|
|
pd = d + z - payload_z;
|
|
payload_end_index = payload_index + p->payload_length;
|
|
for (i = 0; i < payload_z; i++) {
|
|
page = payload_index >> PAGE_SHIFT;
|
|
offset = payload_index & ~PAGE_MASK;
|
|
next_page_index = (page + 1) << PAGE_SHIFT;
|
|
length =
|
|
min(next_page_index, payload_end_index) - payload_index;
|
|
pd[i].req_count = cpu_to_le16(length);
|
|
|
|
page_bus = page_private(buffer->pages[page]);
|
|
pd[i].data_address = cpu_to_le32(page_bus + offset);
|
|
|
|
payload_index += length;
|
|
}
|
|
|
|
if (p->interrupt)
|
|
irq = DESCRIPTOR_IRQ_ALWAYS;
|
|
else
|
|
irq = DESCRIPTOR_NO_IRQ;
|
|
|
|
last = z == 2 ? d : d + z - 1;
|
|
last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST |
|
|
DESCRIPTOR_STATUS |
|
|
DESCRIPTOR_BRANCH_ALWAYS |
|
|
irq);
|
|
|
|
context_append(&ctx->context, d, z, header_z);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ohci_queue_iso_receive_packet_per_buffer(struct fw_iso_context *base,
|
|
struct fw_iso_packet *packet,
|
|
struct fw_iso_buffer *buffer,
|
|
unsigned long payload)
|
|
{
|
|
struct iso_context *ctx = container_of(base, struct iso_context, base);
|
|
struct descriptor *d, *pd;
|
|
struct fw_iso_packet *p = packet;
|
|
dma_addr_t d_bus, page_bus;
|
|
u32 z, header_z, rest;
|
|
int i, j, length;
|
|
int page, offset, packet_count, header_size, payload_per_buffer;
|
|
|
|
/*
|
|
* The OHCI controller puts the isochronous header and trailer in the
|
|
* buffer, so we need at least 8 bytes.
|
|
*/
|
|
packet_count = p->header_length / ctx->base.header_size;
|
|
header_size = max(ctx->base.header_size, (size_t)8);
|
|
|
|
/* Get header size in number of descriptors. */
|
|
header_z = DIV_ROUND_UP(header_size, sizeof(*d));
|
|
page = payload >> PAGE_SHIFT;
|
|
offset = payload & ~PAGE_MASK;
|
|
payload_per_buffer = p->payload_length / packet_count;
|
|
|
|
for (i = 0; i < packet_count; i++) {
|
|
/* d points to the header descriptor */
|
|
z = DIV_ROUND_UP(payload_per_buffer + offset, PAGE_SIZE) + 1;
|
|
d = context_get_descriptors(&ctx->context,
|
|
z + header_z, &d_bus);
|
|
if (d == NULL)
|
|
return -ENOMEM;
|
|
|
|
d->control = cpu_to_le16(DESCRIPTOR_STATUS |
|
|
DESCRIPTOR_INPUT_MORE);
|
|
if (p->skip && i == 0)
|
|
d->control |= cpu_to_le16(DESCRIPTOR_WAIT);
|
|
d->req_count = cpu_to_le16(header_size);
|
|
d->res_count = d->req_count;
|
|
d->transfer_status = 0;
|
|
d->data_address = cpu_to_le32(d_bus + (z * sizeof(*d)));
|
|
|
|
rest = payload_per_buffer;
|
|
pd = d;
|
|
for (j = 1; j < z; j++) {
|
|
pd++;
|
|
pd->control = cpu_to_le16(DESCRIPTOR_STATUS |
|
|
DESCRIPTOR_INPUT_MORE);
|
|
|
|
if (offset + rest < PAGE_SIZE)
|
|
length = rest;
|
|
else
|
|
length = PAGE_SIZE - offset;
|
|
pd->req_count = cpu_to_le16(length);
|
|
pd->res_count = pd->req_count;
|
|
pd->transfer_status = 0;
|
|
|
|
page_bus = page_private(buffer->pages[page]);
|
|
pd->data_address = cpu_to_le32(page_bus + offset);
|
|
|
|
offset = (offset + length) & ~PAGE_MASK;
|
|
rest -= length;
|
|
if (offset == 0)
|
|
page++;
|
|
}
|
|
pd->control = cpu_to_le16(DESCRIPTOR_STATUS |
|
|
DESCRIPTOR_INPUT_LAST |
|
|
DESCRIPTOR_BRANCH_ALWAYS);
|
|
if (p->interrupt && i == packet_count - 1)
|
|
pd->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS);
|
|
|
|
context_append(&ctx->context, d, z, header_z);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ohci_queue_iso(struct fw_iso_context *base,
|
|
struct fw_iso_packet *packet,
|
|
struct fw_iso_buffer *buffer,
|
|
unsigned long payload)
|
|
{
|
|
struct iso_context *ctx = container_of(base, struct iso_context, base);
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&ctx->context.ohci->lock, flags);
|
|
if (base->type == FW_ISO_CONTEXT_TRANSMIT)
|
|
ret = ohci_queue_iso_transmit(base, packet, buffer, payload);
|
|
else
|
|
ret = ohci_queue_iso_receive_packet_per_buffer(base, packet,
|
|
buffer, payload);
|
|
spin_unlock_irqrestore(&ctx->context.ohci->lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct fw_card_driver ohci_driver = {
|
|
.enable = ohci_enable,
|
|
.update_phy_reg = ohci_update_phy_reg,
|
|
.set_config_rom = ohci_set_config_rom,
|
|
.send_request = ohci_send_request,
|
|
.send_response = ohci_send_response,
|
|
.cancel_packet = ohci_cancel_packet,
|
|
.enable_phys_dma = ohci_enable_phys_dma,
|
|
.get_cycle_time = ohci_get_cycle_time,
|
|
|
|
.allocate_iso_context = ohci_allocate_iso_context,
|
|
.free_iso_context = ohci_free_iso_context,
|
|
.queue_iso = ohci_queue_iso,
|
|
.start_iso = ohci_start_iso,
|
|
.stop_iso = ohci_stop_iso,
|
|
};
|
|
|
|
#ifdef CONFIG_PPC_PMAC
|
|
static void ohci_pmac_on(struct pci_dev *dev)
|
|
{
|
|
if (machine_is(powermac)) {
|
|
struct device_node *ofn = pci_device_to_OF_node(dev);
|
|
|
|
if (ofn) {
|
|
pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1);
|
|
pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void ohci_pmac_off(struct pci_dev *dev)
|
|
{
|
|
if (machine_is(powermac)) {
|
|
struct device_node *ofn = pci_device_to_OF_node(dev);
|
|
|
|
if (ofn) {
|
|
pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0);
|
|
pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0);
|
|
}
|
|
}
|
|
}
|
|
#else
|
|
#define ohci_pmac_on(dev)
|
|
#define ohci_pmac_off(dev)
|
|
#endif /* CONFIG_PPC_PMAC */
|
|
|
|
static int __devinit pci_probe(struct pci_dev *dev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
struct fw_ohci *ohci;
|
|
u32 bus_options, max_receive, link_speed, version;
|
|
u64 guid;
|
|
int i, err, n_ir, n_it;
|
|
size_t size;
|
|
|
|
ohci = kzalloc(sizeof(*ohci), GFP_KERNEL);
|
|
if (ohci == NULL) {
|
|
err = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev);
|
|
|
|
ohci_pmac_on(dev);
|
|
|
|
err = pci_enable_device(dev);
|
|
if (err) {
|
|
fw_error("Failed to enable OHCI hardware\n");
|
|
goto fail_free;
|
|
}
|
|
|
|
pci_set_master(dev);
|
|
pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0);
|
|
pci_set_drvdata(dev, ohci);
|
|
|
|
spin_lock_init(&ohci->lock);
|
|
|
|
tasklet_init(&ohci->bus_reset_tasklet,
|
|
bus_reset_tasklet, (unsigned long)ohci);
|
|
|
|
err = pci_request_region(dev, 0, ohci_driver_name);
|
|
if (err) {
|
|
fw_error("MMIO resource unavailable\n");
|
|
goto fail_disable;
|
|
}
|
|
|
|
ohci->registers = pci_iomap(dev, 0, OHCI1394_REGISTER_SIZE);
|
|
if (ohci->registers == NULL) {
|
|
fw_error("Failed to remap registers\n");
|
|
err = -ENXIO;
|
|
goto fail_iomem;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ohci_quirks); i++)
|
|
if (ohci_quirks[i].vendor == dev->vendor &&
|
|
(ohci_quirks[i].device == dev->device ||
|
|
ohci_quirks[i].device == (unsigned short)PCI_ANY_ID)) {
|
|
ohci->quirks = ohci_quirks[i].flags;
|
|
break;
|
|
}
|
|
if (param_quirks)
|
|
ohci->quirks = param_quirks;
|
|
|
|
ar_context_init(&ohci->ar_request_ctx, ohci,
|
|
OHCI1394_AsReqRcvContextControlSet);
|
|
|
|
ar_context_init(&ohci->ar_response_ctx, ohci,
|
|
OHCI1394_AsRspRcvContextControlSet);
|
|
|
|
context_init(&ohci->at_request_ctx, ohci,
|
|
OHCI1394_AsReqTrContextControlSet, handle_at_packet);
|
|
|
|
context_init(&ohci->at_response_ctx, ohci,
|
|
OHCI1394_AsRspTrContextControlSet, handle_at_packet);
|
|
|
|
reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0);
|
|
ohci->ir_context_channels = ~0ULL;
|
|
ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet);
|
|
reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0);
|
|
n_ir = hweight32(ohci->ir_context_mask);
|
|
size = sizeof(struct iso_context) * n_ir;
|
|
ohci->ir_context_list = kzalloc(size, GFP_KERNEL);
|
|
|
|
reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0);
|
|
ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet);
|
|
reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0);
|
|
n_it = hweight32(ohci->it_context_mask);
|
|
size = sizeof(struct iso_context) * n_it;
|
|
ohci->it_context_list = kzalloc(size, GFP_KERNEL);
|
|
|
|
if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) {
|
|
err = -ENOMEM;
|
|
goto fail_contexts;
|
|
}
|
|
|
|
/* self-id dma buffer allocation */
|
|
ohci->self_id_cpu = dma_alloc_coherent(ohci->card.device,
|
|
SELF_ID_BUF_SIZE,
|
|
&ohci->self_id_bus,
|
|
GFP_KERNEL);
|
|
if (ohci->self_id_cpu == NULL) {
|
|
err = -ENOMEM;
|
|
goto fail_contexts;
|
|
}
|
|
|
|
bus_options = reg_read(ohci, OHCI1394_BusOptions);
|
|
max_receive = (bus_options >> 12) & 0xf;
|
|
link_speed = bus_options & 0x7;
|
|
guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) |
|
|
reg_read(ohci, OHCI1394_GUIDLo);
|
|
|
|
err = fw_card_add(&ohci->card, max_receive, link_speed, guid);
|
|
if (err)
|
|
goto fail_self_id;
|
|
|
|
version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
|
|
fw_notify("Added fw-ohci device %s, OHCI v%x.%x, "
|
|
"%d IR + %d IT contexts, quirks 0x%x\n",
|
|
dev_name(&dev->dev), version >> 16, version & 0xff,
|
|
n_ir, n_it, ohci->quirks);
|
|
|
|
return 0;
|
|
|
|
fail_self_id:
|
|
dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE,
|
|
ohci->self_id_cpu, ohci->self_id_bus);
|
|
fail_contexts:
|
|
kfree(ohci->ir_context_list);
|
|
kfree(ohci->it_context_list);
|
|
context_release(&ohci->at_response_ctx);
|
|
context_release(&ohci->at_request_ctx);
|
|
ar_context_release(&ohci->ar_response_ctx);
|
|
ar_context_release(&ohci->ar_request_ctx);
|
|
pci_iounmap(dev, ohci->registers);
|
|
fail_iomem:
|
|
pci_release_region(dev, 0);
|
|
fail_disable:
|
|
pci_disable_device(dev);
|
|
fail_free:
|
|
kfree(&ohci->card);
|
|
ohci_pmac_off(dev);
|
|
fail:
|
|
if (err == -ENOMEM)
|
|
fw_error("Out of memory\n");
|
|
|
|
return err;
|
|
}
|
|
|
|
static void pci_remove(struct pci_dev *dev)
|
|
{
|
|
struct fw_ohci *ohci;
|
|
|
|
ohci = pci_get_drvdata(dev);
|
|
reg_write(ohci, OHCI1394_IntMaskClear, ~0);
|
|
flush_writes(ohci);
|
|
fw_core_remove_card(&ohci->card);
|
|
|
|
/*
|
|
* FIXME: Fail all pending packets here, now that the upper
|
|
* layers can't queue any more.
|
|
*/
|
|
|
|
software_reset(ohci);
|
|
free_irq(dev->irq, ohci);
|
|
|
|
if (ohci->next_config_rom && ohci->next_config_rom != ohci->config_rom)
|
|
dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
|
|
ohci->next_config_rom, ohci->next_config_rom_bus);
|
|
if (ohci->config_rom)
|
|
dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
|
|
ohci->config_rom, ohci->config_rom_bus);
|
|
dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE,
|
|
ohci->self_id_cpu, ohci->self_id_bus);
|
|
ar_context_release(&ohci->ar_request_ctx);
|
|
ar_context_release(&ohci->ar_response_ctx);
|
|
context_release(&ohci->at_request_ctx);
|
|
context_release(&ohci->at_response_ctx);
|
|
kfree(ohci->it_context_list);
|
|
kfree(ohci->ir_context_list);
|
|
pci_iounmap(dev, ohci->registers);
|
|
pci_release_region(dev, 0);
|
|
pci_disable_device(dev);
|
|
kfree(&ohci->card);
|
|
ohci_pmac_off(dev);
|
|
|
|
fw_notify("Removed fw-ohci device.\n");
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int pci_suspend(struct pci_dev *dev, pm_message_t state)
|
|
{
|
|
struct fw_ohci *ohci = pci_get_drvdata(dev);
|
|
int err;
|
|
|
|
software_reset(ohci);
|
|
free_irq(dev->irq, ohci);
|
|
err = pci_save_state(dev);
|
|
if (err) {
|
|
fw_error("pci_save_state failed\n");
|
|
return err;
|
|
}
|
|
err = pci_set_power_state(dev, pci_choose_state(dev, state));
|
|
if (err)
|
|
fw_error("pci_set_power_state failed with %d\n", err);
|
|
ohci_pmac_off(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pci_resume(struct pci_dev *dev)
|
|
{
|
|
struct fw_ohci *ohci = pci_get_drvdata(dev);
|
|
int err;
|
|
|
|
ohci_pmac_on(dev);
|
|
pci_set_power_state(dev, PCI_D0);
|
|
pci_restore_state(dev);
|
|
err = pci_enable_device(dev);
|
|
if (err) {
|
|
fw_error("pci_enable_device failed\n");
|
|
return err;
|
|
}
|
|
|
|
return ohci_enable(&ohci->card, NULL, 0);
|
|
}
|
|
#endif
|
|
|
|
static const struct pci_device_id pci_table[] = {
|
|
{ PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, pci_table);
|
|
|
|
static struct pci_driver fw_ohci_pci_driver = {
|
|
.name = ohci_driver_name,
|
|
.id_table = pci_table,
|
|
.probe = pci_probe,
|
|
.remove = pci_remove,
|
|
#ifdef CONFIG_PM
|
|
.resume = pci_resume,
|
|
.suspend = pci_suspend,
|
|
#endif
|
|
};
|
|
|
|
MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
|
|
MODULE_DESCRIPTION("Driver for PCI OHCI IEEE1394 controllers");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/* Provide a module alias so root-on-sbp2 initrds don't break. */
|
|
#ifndef CONFIG_IEEE1394_OHCI1394_MODULE
|
|
MODULE_ALIAS("ohci1394");
|
|
#endif
|
|
|
|
static int __init fw_ohci_init(void)
|
|
{
|
|
return pci_register_driver(&fw_ohci_pci_driver);
|
|
}
|
|
|
|
static void __exit fw_ohci_cleanup(void)
|
|
{
|
|
pci_unregister_driver(&fw_ohci_pci_driver);
|
|
}
|
|
|
|
module_init(fw_ohci_init);
|
|
module_exit(fw_ohci_cleanup);
|