| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Adrian McMenamin | 3408 | 89.87% | 1 | 3.03% |
| Jens Axboe | 101 | 2.66% | 3 | 9.09% |
| Arnd Bergmann | 62 | 1.64% | 3 | 9.09% |
| Paul Mundt | 41 | 1.08% | 3 | 9.09% |
| Christoph Hellwig | 31 | 0.82% | 3 | 9.09% |
| Tejun Heo | 31 | 0.82% | 3 | 9.09% |
| Borislav Petkov | 28 | 0.74% | 1 | 3.03% |
| Joe Perches | 27 | 0.71% | 1 | 3.03% |
| Al Viro | 19 | 0.50% | 3 | 9.09% |
| Christophe Jaillet | 11 | 0.29% | 1 | 3.03% |
| Wenwen Wang | 7 | 0.18% | 1 | 3.03% |
| Kees Cook | 6 | 0.16% | 1 | 3.03% |
| Maurizio Lombardi | 5 | 0.13% | 1 | 3.03% |
| Nobuhiro Iwamatsu | 3 | 0.08% | 1 | 3.03% |
| Akinobu Mita | 3 | 0.08% | 1 | 3.03% |
| Kiyoshi Ueda | 2 | 0.05% | 1 | 3.03% |
| Michael Opdenacker | 2 | 0.05% | 1 | 3.03% |
| Libo Chen | 2 | 0.05% | 1 | 3.03% |
| Martin K. Petersen | 2 | 0.05% | 2 | 6.06% |
| Alexey Dobriyan | 1 | 0.03% | 1 | 3.03% |
| Total | 3792 | 33 |
/* GD ROM driver for the SEGA Dreamcast * copyright Adrian McMenamin, 2007 * With thanks to Marcus Comstedt and Nathan Keynes * for work in reversing PIO and DMA * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/init.h> #include <linux/module.h> #include <linux/fs.h> #include <linux/kernel.h> #include <linux/list.h> #include <linux/slab.h> #include <linux/dma-mapping.h> #include <linux/cdrom.h> #include <linux/genhd.h> #include <linux/bio.h> #include <linux/blk-mq.h> #include <linux/interrupt.h> #include <linux/device.h> #include <linux/mutex.h> #include <linux/wait.h> #include <linux/platform_device.h> #include <scsi/scsi.h> #include <asm/io.h> #include <asm/dma.h> #include <asm/delay.h> #include <mach/dma.h> #include <mach/sysasic.h> #define GDROM_DEV_NAME "gdrom" #define GD_SESSION_OFFSET 150 /* GD Rom commands */ #define GDROM_COM_SOFTRESET 0x08 #define GDROM_COM_EXECDIAG 0x90 #define GDROM_COM_PACKET 0xA0 #define GDROM_COM_IDDEV 0xA1 /* GD Rom registers */ #define GDROM_BASE_REG 0xA05F7000 #define GDROM_ALTSTATUS_REG (GDROM_BASE_REG + 0x18) #define GDROM_DATA_REG (GDROM_BASE_REG + 0x80) #define GDROM_ERROR_REG (GDROM_BASE_REG + 0x84) #define GDROM_INTSEC_REG (GDROM_BASE_REG + 0x88) #define GDROM_SECNUM_REG (GDROM_BASE_REG + 0x8C) #define GDROM_BCL_REG (GDROM_BASE_REG + 0x90) #define GDROM_BCH_REG (GDROM_BASE_REG + 0x94) #define GDROM_DSEL_REG (GDROM_BASE_REG + 0x98) #define GDROM_STATUSCOMMAND_REG (GDROM_BASE_REG + 0x9C) #define GDROM_RESET_REG (GDROM_BASE_REG + 0x4E4) #define GDROM_DMA_STARTADDR_REG (GDROM_BASE_REG + 0x404) #define GDROM_DMA_LENGTH_REG (GDROM_BASE_REG + 0x408) #define GDROM_DMA_DIRECTION_REG (GDROM_BASE_REG + 0x40C) #define GDROM_DMA_ENABLE_REG (GDROM_BASE_REG + 0x414) #define GDROM_DMA_STATUS_REG (GDROM_BASE_REG + 0x418) #define GDROM_DMA_WAIT_REG (GDROM_BASE_REG + 0x4A0) #define GDROM_DMA_ACCESS_CTRL_REG (GDROM_BASE_REG + 0x4B8) #define GDROM_HARD_SECTOR 2048 #define BLOCK_LAYER_SECTOR 512 #define GD_TO_BLK 4 #define GDROM_DEFAULT_TIMEOUT (HZ * 7) static DEFINE_MUTEX(gdrom_mutex); static const struct { int sense_key; const char * const text; } sense_texts[] = { {NO_SENSE, "OK"}, {RECOVERED_ERROR, "Recovered from error"}, {NOT_READY, "Device not ready"}, {MEDIUM_ERROR, "Disk not ready"}, {HARDWARE_ERROR, "Hardware error"}, {ILLEGAL_REQUEST, "Command has failed"}, {UNIT_ATTENTION, "Device needs attention - disk may have been changed"}, {DATA_PROTECT, "Data protection error"}, {ABORTED_COMMAND, "Command aborted"}, }; static struct platform_device *pd; static int gdrom_major; static DECLARE_WAIT_QUEUE_HEAD(command_queue); static DECLARE_WAIT_QUEUE_HEAD(request_queue); struct gdromtoc { unsigned int entry[99]; unsigned int first, last; unsigned int leadout; }; static struct gdrom_unit { struct gendisk *disk; struct cdrom_device_info *cd_info; int status; int pending; int transfer; char disk_type; struct gdromtoc *toc; struct request_queue *gdrom_rq; struct blk_mq_tag_set tag_set; } gd; struct gdrom_id { char mid; char modid; char verid; char padA[13]; char mname[16]; char modname[16]; char firmver[16]; char padB[16]; }; static int gdrom_getsense(short *bufstring); static int gdrom_packetcommand(struct cdrom_device_info *cd_info, struct packet_command *command); static int gdrom_hardreset(struct cdrom_device_info *cd_info); static bool gdrom_is_busy(void) { return (__raw_readb(GDROM_ALTSTATUS_REG) & 0x80) != 0; } static bool gdrom_data_request(void) { return (__raw_readb(GDROM_ALTSTATUS_REG) & 0x88) == 8; } static bool gdrom_wait_clrbusy(void) { unsigned long timeout = jiffies + GDROM_DEFAULT_TIMEOUT; while ((__raw_readb(GDROM_ALTSTATUS_REG) & 0x80) && (time_before(jiffies, timeout))) cpu_relax(); return time_before(jiffies, timeout + 1); } static bool gdrom_wait_busy_sleeps(void) { unsigned long timeout; /* Wait to get busy first */ timeout = jiffies + GDROM_DEFAULT_TIMEOUT; while (!gdrom_is_busy() && time_before(jiffies, timeout)) cpu_relax(); /* Now wait for busy to clear */ return gdrom_wait_clrbusy(); } static void gdrom_identifydevice(void *buf) { int c; short *data = buf; /* If the device won't clear it has probably * been hit by a serious failure - but we'll * try to return a sense key even so */ if (!gdrom_wait_clrbusy()) { gdrom_getsense(NULL); return; } __raw_writeb(GDROM_COM_IDDEV, GDROM_STATUSCOMMAND_REG); if (!gdrom_wait_busy_sleeps()) { gdrom_getsense(NULL); return; } /* now read in the data */ for (c = 0; c < 40; c++) data[c] = __raw_readw(GDROM_DATA_REG); } static void gdrom_spicommand(void *spi_string, int buflen) { short *cmd = spi_string; unsigned long timeout; /* ensure IRQ_WAIT is set */ __raw_writeb(0x08, GDROM_ALTSTATUS_REG); /* specify how many bytes we expect back */ __raw_writeb(buflen & 0xFF, GDROM_BCL_REG); __raw_writeb((buflen >> 8) & 0xFF, GDROM_BCH_REG); /* other parameters */ __raw_writeb(0, GDROM_INTSEC_REG); __raw_writeb(0, GDROM_SECNUM_REG); __raw_writeb(0, GDROM_ERROR_REG); /* Wait until we can go */ if (!gdrom_wait_clrbusy()) { gdrom_getsense(NULL); return; } timeout = jiffies + GDROM_DEFAULT_TIMEOUT; __raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG); while (!gdrom_data_request() && time_before(jiffies, timeout)) cpu_relax(); if (!time_before(jiffies, timeout + 1)) { gdrom_getsense(NULL); return; } outsw(GDROM_DATA_REG, cmd, 6); } /* gdrom_command_executediagnostic: * Used to probe for presence of working GDROM * Restarts GDROM device and then applies standard ATA 3 * Execute Diagnostic Command: a return of '1' indicates device 0 * present and device 1 absent */ static char gdrom_execute_diagnostic(void) { gdrom_hardreset(gd.cd_info); if (!gdrom_wait_clrbusy()) return 0; __raw_writeb(GDROM_COM_EXECDIAG, GDROM_STATUSCOMMAND_REG); if (!gdrom_wait_busy_sleeps()) return 0; return __raw_readb(GDROM_ERROR_REG); } /* * Prepare disk command * byte 0 = 0x70 * byte 1 = 0x1f */ static int gdrom_preparedisk_cmd(void) { struct packet_command *spin_command; spin_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); if (!spin_command) return -ENOMEM; spin_command->cmd[0] = 0x70; spin_command->cmd[2] = 0x1f; spin_command->buflen = 0; gd.pending = 1; gdrom_packetcommand(gd.cd_info, spin_command); /* 60 second timeout */ wait_event_interruptible_timeout(command_queue, gd.pending == 0, GDROM_DEFAULT_TIMEOUT); gd.pending = 0; kfree(spin_command); if (gd.status & 0x01) { /* log an error */ gdrom_getsense(NULL); return -EIO; } return 0; } /* * Read TOC command * byte 0 = 0x14 * byte 1 = session * byte 3 = sizeof TOC >> 8 ie upper byte * byte 4 = sizeof TOC & 0xff ie lower byte */ static int gdrom_readtoc_cmd(struct gdromtoc *toc, int session) { int tocsize; struct packet_command *toc_command; int err = 0; toc_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); if (!toc_command) return -ENOMEM; tocsize = sizeof(struct gdromtoc); toc_command->cmd[0] = 0x14; toc_command->cmd[1] = session; toc_command->cmd[3] = tocsize >> 8; toc_command->cmd[4] = tocsize & 0xff; toc_command->buflen = tocsize; if (gd.pending) { err = -EBUSY; goto cleanup_readtoc_final; } gd.pending = 1; gdrom_packetcommand(gd.cd_info, toc_command); wait_event_interruptible_timeout(command_queue, gd.pending == 0, GDROM_DEFAULT_TIMEOUT); if (gd.pending) { err = -EINVAL; goto cleanup_readtoc; } insw(GDROM_DATA_REG, toc, tocsize/2); if (gd.status & 0x01) err = -EINVAL; cleanup_readtoc: gd.pending = 0; cleanup_readtoc_final: kfree(toc_command); return err; } /* TOC helpers */ static int get_entry_lba(int track) { return (cpu_to_be32(track & 0xffffff00) - GD_SESSION_OFFSET); } static int get_entry_q_ctrl(int track) { return (track & 0x000000f0) >> 4; } static int get_entry_track(int track) { return (track & 0x0000ff00) >> 8; } static int gdrom_get_last_session(struct cdrom_device_info *cd_info, struct cdrom_multisession *ms_info) { int fentry, lentry, track, data, err; if (!gd.toc) return -ENOMEM; /* Check if GD-ROM */ err = gdrom_readtoc_cmd(gd.toc, 1); /* Not a GD-ROM so check if standard CD-ROM */ if (err) { err = gdrom_readtoc_cmd(gd.toc, 0); if (err) { pr_info("Could not get CD table of contents\n"); return -ENXIO; } } fentry = get_entry_track(gd.toc->first); lentry = get_entry_track(gd.toc->last); /* Find the first data track */ track = get_entry_track(gd.toc->last); do { data = gd.toc->entry[track - 1]; if (get_entry_q_ctrl(data)) break; /* ie a real data track */ track--; } while (track >= fentry); if ((track > 100) || (track < get_entry_track(gd.toc->first))) { pr_info("No data on the last session of the CD\n"); gdrom_getsense(NULL); return -ENXIO; } ms_info->addr_format = CDROM_LBA; ms_info->addr.lba = get_entry_lba(data); ms_info->xa_flag = 1; return 0; } static int gdrom_open(struct cdrom_device_info *cd_info, int purpose) { /* spin up the disk */ return gdrom_preparedisk_cmd(); } /* this function is required even if empty */ static void gdrom_release(struct cdrom_device_info *cd_info) { } static int gdrom_drivestatus(struct cdrom_device_info *cd_info, int ignore) { /* read the sense key */ char sense = __raw_readb(GDROM_ERROR_REG); sense &= 0xF0; if (sense == 0) return CDS_DISC_OK; if (sense == 0x20) return CDS_DRIVE_NOT_READY; /* default */ return CDS_NO_INFO; } static unsigned int gdrom_check_events(struct cdrom_device_info *cd_info, unsigned int clearing, int ignore) { /* check the sense key */ return (__raw_readb(GDROM_ERROR_REG) & 0xF0) == 0x60 ? DISK_EVENT_MEDIA_CHANGE : 0; } /* reset the G1 bus */ static int gdrom_hardreset(struct cdrom_device_info *cd_info) { int count; __raw_writel(0x1fffff, GDROM_RESET_REG); for (count = 0xa0000000; count < 0xa0200000; count += 4) __raw_readl(count); return 0; } /* keep the function looking like the universal * CD Rom specification - returning int */ static int gdrom_packetcommand(struct cdrom_device_info *cd_info, struct packet_command *command) { gdrom_spicommand(&command->cmd, command->buflen); return 0; } /* Get Sense SPI command * From Marcus Comstedt * cmd = 0x13 * cmd + 4 = length of returned buffer * Returns 5 16 bit words */ static int gdrom_getsense(short *bufstring) { struct packet_command *sense_command; short sense[5]; int sense_key; int err = -EIO; sense_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); if (!sense_command) return -ENOMEM; sense_command->cmd[0] = 0x13; sense_command->cmd[4] = 10; sense_command->buflen = 10; /* even if something is pending try to get * the sense key if possible */ if (gd.pending && !gdrom_wait_clrbusy()) { err = -EBUSY; goto cleanup_sense_final; } gd.pending = 1; gdrom_packetcommand(gd.cd_info, sense_command); wait_event_interruptible_timeout(command_queue, gd.pending == 0, GDROM_DEFAULT_TIMEOUT); if (gd.pending) goto cleanup_sense; insw(GDROM_DATA_REG, &sense, sense_command->buflen/2); if (sense[1] & 40) { pr_info("Drive not ready - command aborted\n"); goto cleanup_sense; } sense_key = sense[1] & 0x0F; if (sense_key < ARRAY_SIZE(sense_texts)) pr_info("%s\n", sense_texts[sense_key].text); else pr_err("Unknown sense key: %d\n", sense_key); if (bufstring) /* return addional sense data */ memcpy(bufstring, &sense[4], 2); if (sense_key < 2) err = 0; cleanup_sense: gd.pending = 0; cleanup_sense_final: kfree(sense_command); return err; } static int gdrom_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) { return -EINVAL; } static const struct cdrom_device_ops gdrom_ops = { .open = gdrom_open, .release = gdrom_release, .drive_status = gdrom_drivestatus, .check_events = gdrom_check_events, .get_last_session = gdrom_get_last_session, .reset = gdrom_hardreset, .audio_ioctl = gdrom_audio_ioctl, .generic_packet = cdrom_dummy_generic_packet, .capability = CDC_MULTI_SESSION | CDC_MEDIA_CHANGED | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R, }; static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode) { int ret; check_disk_change(bdev); mutex_lock(&gdrom_mutex); ret = cdrom_open(gd.cd_info, bdev, mode); mutex_unlock(&gdrom_mutex); return ret; } static void gdrom_bdops_release(struct gendisk *disk, fmode_t mode) { mutex_lock(&gdrom_mutex); cdrom_release(gd.cd_info, mode); mutex_unlock(&gdrom_mutex); } static unsigned int gdrom_bdops_check_events(struct gendisk *disk, unsigned int clearing) { return cdrom_check_events(gd.cd_info, clearing); } static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, unsigned long arg) { int ret; mutex_lock(&gdrom_mutex); ret = cdrom_ioctl(gd.cd_info, bdev, mode, cmd, arg); mutex_unlock(&gdrom_mutex); return ret; } static const struct block_device_operations gdrom_bdops = { .owner = THIS_MODULE, .open = gdrom_bdops_open, .release = gdrom_bdops_release, .check_events = gdrom_bdops_check_events, .ioctl = gdrom_bdops_ioctl, }; static irqreturn_t gdrom_command_interrupt(int irq, void *dev_id) { gd.status = __raw_readb(GDROM_STATUSCOMMAND_REG); if (gd.pending != 1) return IRQ_HANDLED; gd.pending = 0; wake_up_interruptible(&command_queue); return IRQ_HANDLED; } static irqreturn_t gdrom_dma_interrupt(int irq, void *dev_id) { gd.status = __raw_readb(GDROM_STATUSCOMMAND_REG); if (gd.transfer != 1) return IRQ_HANDLED; gd.transfer = 0; wake_up_interruptible(&request_queue); return IRQ_HANDLED; } static int gdrom_set_interrupt_handlers(void) { int err; err = request_irq(HW_EVENT_GDROM_CMD, gdrom_command_interrupt, 0, "gdrom_command", &gd); if (err) return err; err = request_irq(HW_EVENT_GDROM_DMA, gdrom_dma_interrupt, 0, "gdrom_dma", &gd); if (err) free_irq(HW_EVENT_GDROM_CMD, &gd); return err; } /* Implement DMA read using SPI command * 0 -> 0x30 * 1 -> mode * 2 -> block >> 16 * 3 -> block >> 8 * 4 -> block * 8 -> sectors >> 16 * 9 -> sectors >> 8 * 10 -> sectors */ static blk_status_t gdrom_readdisk_dma(struct request *req) { int block, block_cnt; blk_status_t err; struct packet_command *read_command; unsigned long timeout; read_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); if (!read_command) return BLK_STS_RESOURCE; read_command->cmd[0] = 0x30; read_command->cmd[1] = 0x20; block = blk_rq_pos(req)/GD_TO_BLK + GD_SESSION_OFFSET; block_cnt = blk_rq_sectors(req)/GD_TO_BLK; __raw_writel(virt_to_phys(bio_data(req->bio)), GDROM_DMA_STARTADDR_REG); __raw_writel(block_cnt * GDROM_HARD_SECTOR, GDROM_DMA_LENGTH_REG); __raw_writel(1, GDROM_DMA_DIRECTION_REG); __raw_writel(1, GDROM_DMA_ENABLE_REG); read_command->cmd[2] = (block >> 16) & 0xFF; read_command->cmd[3] = (block >> 8) & 0xFF; read_command->cmd[4] = block & 0xFF; read_command->cmd[8] = (block_cnt >> 16) & 0xFF; read_command->cmd[9] = (block_cnt >> 8) & 0xFF; read_command->cmd[10] = block_cnt & 0xFF; /* set for DMA */ __raw_writeb(1, GDROM_ERROR_REG); /* other registers */ __raw_writeb(0, GDROM_SECNUM_REG); __raw_writeb(0, GDROM_BCL_REG); __raw_writeb(0, GDROM_BCH_REG); __raw_writeb(0, GDROM_DSEL_REG); __raw_writeb(0, GDROM_INTSEC_REG); /* Wait for registers to reset after any previous activity */ timeout = jiffies + HZ / 2; while (gdrom_is_busy() && time_before(jiffies, timeout)) cpu_relax(); __raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG); timeout = jiffies + HZ / 2; /* Wait for packet command to finish */ while (gdrom_is_busy() && time_before(jiffies, timeout)) cpu_relax(); gd.pending = 1; gd.transfer = 1; outsw(GDROM_DATA_REG, &read_command->cmd, 6); timeout = jiffies + HZ / 2; /* Wait for any pending DMA to finish */ while (__raw_readb(GDROM_DMA_STATUS_REG) && time_before(jiffies, timeout)) cpu_relax(); /* start transfer */ __raw_writeb(1, GDROM_DMA_STATUS_REG); wait_event_interruptible_timeout(request_queue, gd.transfer == 0, GDROM_DEFAULT_TIMEOUT); err = gd.transfer ? BLK_STS_IOERR : BLK_STS_OK; gd.transfer = 0; gd.pending = 0; blk_mq_end_request(req, err); kfree(read_command); return BLK_STS_OK; } static blk_status_t gdrom_queue_rq(struct blk_mq_hw_ctx *hctx, const struct blk_mq_queue_data *bd) { blk_mq_start_request(bd->rq); switch (req_op(bd->rq)) { case REQ_OP_READ: return gdrom_readdisk_dma(bd->rq); case REQ_OP_WRITE: pr_notice("Read only device - write request ignored\n"); return BLK_STS_IOERR; default: printk(KERN_DEBUG "gdrom: Non-fs request ignored\n"); return BLK_STS_IOERR; } } /* Print string identifying GD ROM device */ static int gdrom_outputversion(void) { struct gdrom_id *id; char *model_name, *manuf_name, *firmw_ver; int err = -ENOMEM; /* query device ID */ id = kzalloc(sizeof(struct gdrom_id), GFP_KERNEL); if (!id) return err; gdrom_identifydevice(id); model_name = kstrndup(id->modname, 16, GFP_KERNEL); if (!model_name) goto free_id; manuf_name = kstrndup(id->mname, 16, GFP_KERNEL); if (!manuf_name) goto free_model_name; firmw_ver = kstrndup(id->firmver, 16, GFP_KERNEL); if (!firmw_ver) goto free_manuf_name; pr_info("%s from %s with firmware %s\n", model_name, manuf_name, firmw_ver); err = 0; kfree(firmw_ver); free_manuf_name: kfree(manuf_name); free_model_name: kfree(model_name); free_id: kfree(id); return err; } /* set the default mode for DMA transfer */ static int gdrom_init_dma_mode(void) { __raw_writeb(0x13, GDROM_ERROR_REG); __raw_writeb(0x22, GDROM_INTSEC_REG); if (!gdrom_wait_clrbusy()) return -EBUSY; __raw_writeb(0xEF, GDROM_STATUSCOMMAND_REG); if (!gdrom_wait_busy_sleeps()) return -EBUSY; /* Memory protection setting for GDROM DMA * Bits 31 - 16 security: 0x8843 * Bits 15 and 7 reserved (0) * Bits 14 - 8 start of transfer range in 1 MB blocks OR'ed with 0x80 * Bits 6 - 0 end of transfer range in 1 MB blocks OR'ed with 0x80 * (0x40 | 0x80) = start range at 0x0C000000 * (0x7F | 0x80) = end range at 0x0FFFFFFF */ __raw_writel(0x8843407F, GDROM_DMA_ACCESS_CTRL_REG); __raw_writel(9, GDROM_DMA_WAIT_REG); /* DMA word setting */ return 0; } static void probe_gdrom_setupcd(void) { gd.cd_info->ops = &gdrom_ops; gd.cd_info->capacity = 1; strcpy(gd.cd_info->name, GDROM_DEV_NAME); gd.cd_info->mask = CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK| CDC_SELECT_DISC; } static void probe_gdrom_setupdisk(void) { gd.disk->major = gdrom_major; gd.disk->first_minor = 1; gd.disk->minors = 1; strcpy(gd.disk->disk_name, GDROM_DEV_NAME); } static int probe_gdrom_setupqueue(void) { blk_queue_logical_block_size(gd.gdrom_rq, GDROM_HARD_SECTOR); /* using DMA so memory will need to be contiguous */ blk_queue_max_segments(gd.gdrom_rq, 1); /* set a large max size to get most from DMA */ blk_queue_max_segment_size(gd.gdrom_rq, 0x40000); gd.disk->queue = gd.gdrom_rq; return gdrom_init_dma_mode(); } static const struct blk_mq_ops gdrom_mq_ops = { .queue_rq = gdrom_queue_rq, }; /* * register this as a block device and as compliant with the * universal CD Rom driver interface */ static int probe_gdrom(struct platform_device *devptr) { int err; /* Start the device */ if (gdrom_execute_diagnostic() != 1) { pr_warning("ATA Probe for GDROM failed\n"); return -ENODEV; } /* Print out firmware ID */ if (gdrom_outputversion()) return -ENOMEM; /* Register GDROM */ gdrom_major = register_blkdev(0, GDROM_DEV_NAME); if (gdrom_major <= 0) return gdrom_major; pr_info("Registered with major number %d\n", gdrom_major); /* Specify basic properties of drive */ gd.cd_info = kzalloc(sizeof(struct cdrom_device_info), GFP_KERNEL); if (!gd.cd_info) { err = -ENOMEM; goto probe_fail_no_mem; } probe_gdrom_setupcd(); gd.disk = alloc_disk(1); if (!gd.disk) { err = -ENODEV; goto probe_fail_no_disk; } probe_gdrom_setupdisk(); if (register_cdrom(gd.cd_info)) { err = -ENODEV; goto probe_fail_cdrom_register; } gd.disk->fops = &gdrom_bdops; /* latch on to the interrupt */ err = gdrom_set_interrupt_handlers(); if (err) goto probe_fail_cmdirq_register; gd.gdrom_rq = blk_mq_init_sq_queue(&gd.tag_set, &gdrom_mq_ops, 1, BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING); if (IS_ERR(gd.gdrom_rq)) { err = PTR_ERR(gd.gdrom_rq); gd.gdrom_rq = NULL; goto probe_fail_requestq; } blk_queue_bounce_limit(gd.gdrom_rq, BLK_BOUNCE_HIGH); err = probe_gdrom_setupqueue(); if (err) goto probe_fail_toc; gd.toc = kzalloc(sizeof(struct gdromtoc), GFP_KERNEL); if (!gd.toc) { err = -ENOMEM; goto probe_fail_toc; } add_disk(gd.disk); return 0; probe_fail_toc: blk_cleanup_queue(gd.gdrom_rq); blk_mq_free_tag_set(&gd.tag_set); probe_fail_requestq: free_irq(HW_EVENT_GDROM_DMA, &gd); free_irq(HW_EVENT_GDROM_CMD, &gd); probe_fail_cmdirq_register: probe_fail_cdrom_register: del_gendisk(gd.disk); probe_fail_no_disk: kfree(gd.cd_info); probe_fail_no_mem: unregister_blkdev(gdrom_major, GDROM_DEV_NAME); gdrom_major = 0; pr_warning("Probe failed - error is 0x%X\n", err); return err; } static int remove_gdrom(struct platform_device *devptr) { blk_cleanup_queue(gd.gdrom_rq); blk_mq_free_tag_set(&gd.tag_set); free_irq(HW_EVENT_GDROM_CMD, &gd); free_irq(HW_EVENT_GDROM_DMA, &gd); del_gendisk(gd.disk); if (gdrom_major) unregister_blkdev(gdrom_major, GDROM_DEV_NAME); unregister_cdrom(gd.cd_info); return 0; } static struct platform_driver gdrom_driver = { .probe = probe_gdrom, .remove = remove_gdrom, .driver = { .name = GDROM_DEV_NAME, }, }; static int __init init_gdrom(void) { int rc; gd.toc = NULL; rc = platform_driver_register(&gdrom_driver); if (rc) return rc; pd = platform_device_register_simple(GDROM_DEV_NAME, -1, NULL, 0); if (IS_ERR(pd)) { platform_driver_unregister(&gdrom_driver); return PTR_ERR(pd); } return 0; } static void __exit exit_gdrom(void) { platform_device_unregister(pd); platform_driver_unregister(&gdrom_driver); kfree(gd.toc); kfree(gd.cd_info); } module_init(init_gdrom); module_exit(exit_gdrom); MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>"); MODULE_DESCRIPTION("SEGA Dreamcast GD-ROM Driver"); MODULE_LICENSE("GPL");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1