diff -rupN linux-2.6-orig/drivers/block/Kconfig linux-2.6/drivers/block/Kconfig --- linux-2.6-orig/drivers/block/Kconfig 2007-12-26 17:27:14.000000000 +0000 +++ linux-2.6/drivers/block/Kconfig 2007-12-27 00:08:39.000000000 +0000 @@ -105,6 +105,18 @@ config PARIDE "MicroSolutions backpack protocol", "DataStor Commuter protocol" etc.). +config GDROM + tristate "SEGA Dreamcast GD-ROM drive" + depends on SH_DREAMCAST + help + A standard SEGA Dreamcast comes with a modified CD ROM drive called a + "GD-ROM" by SEGA to signify it is capable of reading special disks + with up to 1 GB of data. This drive will also read standard CD ROM + disks. Select this option to access any disks in your GD ROM drive. + Most users will want to say "Y" here. + You can also build this as a module which will be called gdrom.ko + + source "drivers/block/paride/Kconfig" config BLK_CPQ_DA diff -rupN linux-2.6-orig/drivers/cdrom/gdrom.c linux-2.6/drivers/cdrom/gdrom.c --- linux-2.6-orig/drivers/cdrom/gdrom.c 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6/drivers/cdrom/gdrom.c 2007-12-27 00:57:01.000000000 +0000 @@ -0,0 +1,776 @@ +/* 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. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 + +static const struct { + int sense_key; + const char * const text; +} sense_texts[] = { + {NO_SENSE, "GDROM: OK"}, + {RECOVERED_ERROR, "GDROM: Recovered from error"}, + {NOT_READY, "GDROM: Device not ready"}, + {MEDIUM_ERROR, "GDROM: Disk not ready"}, + {HARDWARE_ERROR, "GDROM: Hardware error"}, + {ILLEGAL_REQUEST, "GDROM: Command has failed"}, + {UNIT_ATTENTION, "GDROM: Device needs attention - disk may have been changed"}, + {DATA_PROTECT, "GDROM: Data protection error"}, + {ABORTED_COMMAND, "GDROM: Command aborted"}, +}; + +static struct platform_device *pd; +static int gdrom_major; +static wait_queue_head_t command_queue; +static wait_queue_head_t request_queue; + +static DEFINE_SPINLOCK(gdrom_lock); +static void gdrom_readdisk_dma(struct work_struct *work); +static DECLARE_WORK(work, gdrom_readdisk_dma); +static LIST_HEAD(gdrom_deferred); + +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; +} 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 void gdrom_wait_clrbusy(void) +{ + /* long timeouts - typical for a CD Rom */ + unsigned long timeout = jiffies + HZ * 60; + while ((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) && (time_before(jiffies, timeout))) + cpu_relax(); +} + +static void gdrom_wait_busy_sleeps(void) +{ + unsigned long timeout; + /* Wait to get busy first */ + timeout = jiffies + HZ * 60; + while (((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) == 0) && (time_before(jiffies, timeout))) + cpu_relax(); + /* Now wait for busy to clear */ + gdrom_wait_clrbusy(); +} + +static void gdrom_identifydevice(void *buf) +{ + int c; + short *data = buf; + gdrom_wait_clrbusy(); + ctrl_outb(GDROM_COM_IDDEV, GDROM_STATUSCOMMAND_REG); + gdrom_wait_busy_sleeps(); + /* now read in the data */ + for (c = 0; c < 40; c++) + data[c] = ctrl_inw(GDROM_DATA_REG); +} + +static void gdrom_spicommand(void *spi_string, int buflen) +{ + short *cmd = spi_string; + /* ensure IRQ_WAIT is set */ + ctrl_outb(0x08, GDROM_ALTSTATUS_REG); + /* specify how many bytes we expect back */ + ctrl_outb(buflen & 0xFF, GDROM_BCL_REG); + ctrl_outb((buflen >> 8) & 0xFF, GDROM_BCH_REG); + /* other parameters */ + ctrl_outb(0, GDROM_INTSEC_REG); + ctrl_outb(0, GDROM_SECNUM_REG); + ctrl_outb(0, GDROM_ERROR_REG); + /* Wait until we can go */ + gdrom_wait_clrbusy(); + ctrl_outb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG); + while ((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x88) != 8) + cpu_relax(); /* wait for DRQ to be set to 1 */ + outsw(PHYSADDR(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); + gdrom_wait_clrbusy(); + ctrl_outb(GDROM_COM_EXECDIAG, GDROM_STATUSCOMMAND_REG); + gdrom_wait_busy_sleeps(); + return ctrl_inb(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, HZ * 60); + 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; + 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; + gd.pending = 1; + gdrom_packetcommand(gd.cd_info, toc_command); + wait_event_interruptible_timeout(command_queue, gd.pending == 0, HZ * 60); + gd.pending = 0; + insw(PHYSADDR(GDROM_DATA_REG), toc, tocsize/2); + kfree(toc_command); + if (gd.status & 0x01) + return -EINVAL; + return 0; +} + +/* 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, tocuse, err; + kfree(gd.toc); + gd.toc = kzalloc(sizeof(struct gdromtoc), GFP_KERNEL); + if (!gd.toc) + return -ENOMEM; + tocuse = 1; + /* Check if GD-ROM */ + err = gdrom_readtoc_cmd(gd.toc, 1); + /* Not a GD-ROM so check if standard CD-ROM */ + if (err) { + tocuse = 0; + err = gdrom_readtoc_cmd(gd.toc, 0); + if (err) { + printk(KERN_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))) { + gdrom_getsense(NULL); + printk(KERN_INFO "GDROM: No data on the last session of the CD\n"); + 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 = ctrl_inb(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 int gdrom_mediachanged(struct cdrom_device_info *cd_info, int ignore) +{ + /* check the sense key */ + return ((ctrl_inb(GDROM_ERROR_REG) & 0xF0) == 0x60); +} + +/* reset the G1 bus */ +static int gdrom_hardreset(struct cdrom_device_info *cd_info) +{ + int count; + ctrl_outl(0x1fffff, GDROM_RESET_REG); + for (count = 0xa0000000; count < 0xa0200000; count += 4) + ctrl_inl(count); + return 0; +} + +/* keep the function loioking 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; + if (gd.pending) + return -EIO; + + /* allocate command and buffer */ + 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; + + gd.pending = 1; + gdrom_packetcommand(gd.cd_info, sense_command); + /* 60 second timeout */ + wait_event_interruptible_timeout(command_queue, gd.pending == 0, HZ * 60); + gd.pending = 0; + kfree(sense_command); + insw(PHYSADDR(GDROM_DATA_REG), &sense, 5); + if (sense[1] & 40) { + printk(KERN_INFO "GDROM: Drive not ready - command aborted\n"); + return -EIO; + } + sense_key = sense[1] & 0x0F; + printk(KERN_INFO "%s\n", sense_texts[sense_key].text); + + if (bufstring) + memcpy(bufstring, &sense[4], 2); /* return additional sense data */ + + if (sense_key < 2) + return 0; + return -EIO; +} + +static struct cdrom_device_ops gdrom_ops = { + .open = gdrom_open, + .release = gdrom_release, + .drive_status = gdrom_drivestatus, + .media_changed = gdrom_mediachanged, + .get_last_session = gdrom_get_last_session, + .reset = gdrom_hardreset, + .capability = CDC_MULTI_SESSION | CDC_MEDIA_CHANGED | + CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R, + .n_minors = 1, +}; + +static int gdrom_bdops_open(struct inode *inode, struct file *file) +{ + return cdrom_open(gd.cd_info, inode, file); +} + +static int gdrom_bdops_release(struct inode *inode, struct file *file) +{ + return cdrom_release(gd.cd_info, file); +} + +static int gdrom_bdops_mediachanged(struct gendisk *disk) +{ + return cdrom_media_changed(gd.cd_info); +} + +static int gdrom_bdops_ioctl(struct inode *inode, struct file *file, unsigned cmd, unsigned long arg) +{ + return cdrom_ioctl(file, gd.cd_info, inode, cmd, arg); +} + +static struct block_device_operations gdrom_bdops = { + .owner = THIS_MODULE, + .open = gdrom_bdops_open, + .release = gdrom_bdops_release, + .media_changed = gdrom_bdops_mediachanged, + .ioctl = gdrom_bdops_ioctl, +}; + +static irqreturn_t gdrom_command_interrupt(int irq, void *dev_id) +{ + gd.status = ctrl_inb(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 = ctrl_inb(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_command_interrupt_handler(void) +{ + /* need a queue to wait in */ + init_waitqueue_head(&command_queue); + return request_irq(HW_EVENT_GDROM_CMD, gdrom_command_interrupt, IRQF_DISABLED, "gdrom_command", &gd); +} + +static int gdrom_set_dma_interrupt_handler(void) +{ + init_waitqueue_head(&request_queue); + return request_irq(HW_EVENT_GDROM_DMA, gdrom_dma_interrupt, IRQF_DISABLED, "gdrom_dma", &gd); +} + +/* 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 void gdrom_readdisk_dma(struct work_struct *work) +{ + int err, block, block_cnt; + struct packet_command *read_command; + struct list_head *elem, *next; + struct request *req; + unsigned long timeout; + if (list_empty(&gdrom_deferred)) + return; + read_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL); + if (!read_command) + return; /* get more memory later? */ + read_command->cmd[0] = 0x30; + read_command->cmd[1] = 0x20; + spin_lock(&gdrom_lock); + list_for_each_safe(elem, next, &gdrom_deferred) { + req = list_entry(elem, struct request, queuelist); + spin_unlock(&gdrom_lock); + block = req->sector/GD_TO_BLK + GD_SESSION_OFFSET; + block_cnt = req->nr_sectors/GD_TO_BLK; + ctrl_outl(PHYSADDR(req->buffer), GDROM_DMA_STARTADDR_REG); + ctrl_outl(block_cnt * GDROM_HARD_SECTOR, GDROM_DMA_LENGTH_REG); + ctrl_outl(1, GDROM_DMA_DIRECTION_REG); + ctrl_outl(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 */ + ctrl_outb(1, GDROM_ERROR_REG); + /* other registers */ + ctrl_outb(0, GDROM_SECNUM_REG); + ctrl_outb(0, GDROM_BCL_REG); + ctrl_outb(0, GDROM_BCH_REG); + ctrl_outb(0, GDROM_DSEL_REG); + ctrl_outb(0, GDROM_INTSEC_REG); + /* In multiple DMA transfers need to wait */ + timeout = jiffies + HZ / 2; + while ((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) && (time_before(jiffies, timeout))) + cpu_relax(); + ctrl_outb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG); + timeout = jiffies + HZ / 2; + while (((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x88) != 8) && (time_before(jiffies, timeout))) + cpu_relax(); /* wait for DRQ to be set to 1 */ + gd.pending = 1; + gd.transfer = 1; + outsw(PHYSADDR(GDROM_DATA_REG), &read_command->cmd, 6); + timeout = jiffies + HZ / 2; + while ((ctrl_inb(GDROM_DMA_STATUS_REG)) && (time_before(jiffies, timeout))) + cpu_relax(); + ctrl_outb(1, GDROM_DMA_STATUS_REG); + /* 5 second error margin here seems more reasonable */ + wait_event_interruptible_timeout(request_queue, gd.transfer == 0, HZ * 5); + err = ctrl_inb(GDROM_DMA_STATUS_REG); + err = gd.transfer; + gd.transfer = 0; + gd.pending = 0; + /* now seek to take the request spinlock + * before handling ending the request */ + spin_lock(&gdrom_lock); + list_del_init(&req->queuelist); + blk_requeue_request(gd.gdrom_rq, req); + if (err) + end_request(req, 0); + else + end_request(req, 1); + } + spin_unlock(&gdrom_lock); + kfree(read_command); +} + +static void gdrom_request_handler_dma(struct request *req) +{ + /* dequeue, add to list of deferred work + * and then schedule workqueue */ + blkdev_dequeue_request(req); + list_add_tail(&req->queuelist, &gdrom_deferred); + schedule_work(&work); +} + +static void gdrom_request(struct request_queue *rq) +{ + struct request *req; + while ((req = elv_next_request(rq)) != NULL) { + if (!blk_fs_request(req)) { + printk(KERN_DEBUG "GDROM: Non-fs request ignored\n"); + end_request(req, 0); + } + if (rq_data_dir(req) != READ) { + printk(KERN_NOTICE "GDROM: Read only device - write request ignored\n"); + end_request(req, 0); + } + if (req->nr_sectors) + gdrom_request_handler_dma(req); + else + end_request(req, 0); + } +} + +/* Print string identifying GD ROM device */ +static int __devinit 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; + printk(KERN_INFO "GDROM: %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 void __devinit gdrom_init_dma_mode(void) +{ + ctrl_outb(0x13, GDROM_ERROR_REG); + ctrl_outb(0x22, GDROM_INTSEC_REG); + gdrom_wait_clrbusy(); + ctrl_outb(0xEF, GDROM_STATUSCOMMAND_REG); + gdrom_wait_busy_sleeps(); + ctrl_outl(0x8843407F, GDROM_DMA_ACCESS_CTRL_REG); /* memory setting */ + ctrl_outl(9, GDROM_DMA_WAIT_REG); /* DMA word setting */ +} + +static void __devinit 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 __devinit 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 void __devinit probe_gdrom_setupqueue(void) +{ + blk_queue_hardsect_size(gd.gdrom_rq, GDROM_HARD_SECTOR); + /* using DMA so memory will need to be contiguous */ + blk_queue_max_hw_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; + gdrom_init_dma_mode(); +} + +/* + * register this as a block device and as compliant with the + * universal CD Rom driver interface + */ +static int __devinit probe_gdrom(struct platform_device *devptr) +{ + int err; + if (gdrom_execute_diagnostic() != 1) { + printk(KERN_WARNING "GDROM: ATA Probe for GDROM failed.\n"); + return -ENODEV; + } + if (gdrom_outputversion()) + return -ENOMEM; + gdrom_major = register_blkdev(0, GDROM_DEV_NAME); + if (gdrom_major <= 0) + return gdrom_major; + printk(KERN_INFO "GDROM: Block device is registered with major number %d\n", gdrom_major); + 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_command_interrupt_handler(); + if (err) + goto probe_fail_cmdirq_register; + err = gdrom_set_dma_interrupt_handler(); + if (err) + goto probe_fail_dmairq_register; + gd.gdrom_rq = blk_init_queue(gdrom_request, &gdrom_lock); + if (!gd.gdrom_rq) + goto probe_fail_requestq; + probe_gdrom_setupqueue(); + add_disk(gd.disk); + return 0; + +probe_fail_requestq: + free_irq(HW_EVENT_GDROM_DMA, &gd); +probe_fail_dmairq_register: + 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); + unregister_blkdev(gdrom_major, GDROM_DEV_NAME); + gdrom_major = 0; +probe_fail_no_mem: + printk(KERN_WARNING "GDROM: Could not probe for device - error is 0x%X\n", err); + return err; +} + +static int remove_gdrom(struct platform_device *devptr) +{ + blk_cleanup_queue(gd.gdrom_rq); + 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); + return unregister_cdrom(gd.cd_info); +} + +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); +} + +module_init(init_gdrom); +module_exit(exit_gdrom); +MODULE_AUTHOR("Adrian McMenamin "); +MODULE_DESCRIPTION("SEGA Dreamcast GD-ROM Driver"); +MODULE_LICENSE("GPL"); diff -rupN linux-2.6-orig/drivers/cdrom/Makefile linux-2.6/drivers/cdrom/Makefile --- linux-2.6-orig/drivers/cdrom/Makefile 2007-12-26 17:27:15.000000000 +0000 +++ linux-2.6/drivers/cdrom/Makefile 2007-12-27 00:08:39.000000000 +0000 @@ -11,3 +11,4 @@ obj-$(CONFIG_PARIDE_PCD) += cdrom.o obj-$(CONFIG_CDROM_PKTCDVD) += cdrom.o obj-$(CONFIG_VIOCD) += viocd.o cdrom.o +obj-$(CONFIG_GDROM) += gdrom.o cdrom.o