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path: root/drivers/block/n64cart.c
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2021-02-21n64: store dev instance into disk private dataChaitanya Kulkarni
The device instance is declared globally. Remove global variable & use the disk->private_data to store the device instance in the n64cart_probe() and get the same instance from bio->bi_disk->private data in n64cart_submit_bio. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Lauri Kasanen <cand@gmx.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-21n64: cleanup n64cart_probe()Chaitanya Kulkarni
The goto label fail_queue is needed to cleanup the queue allocation when devm_platform_ioremap_resource() or alloc_disk() fails, either of these two functions are not dependent on the queue variable which is allocated prior to these calls. Allocate the queue variable after successful alloc_disk(). Return error directly when devm_platform_ioremap_resource() or alloc_disk() fail. Remove fail_queue label and a call to the blk_cleanup_queue(). Direct return from these two functions allows us to remove the local variable err and allocating queue after alloc_disk() allows us to remove the local variable queue so we use disk->queue directly. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Lauri Kasanen <cand@gmx.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-21n64: cosmetics changesChaitanya Kulkarni
Make the variable declaration ascending order and initialize the variables at the time of declaration when possible. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Lauri Kasanen <cand@gmx.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-21n64: remove curly bracketsChaitanya Kulkarni
Remove extra braces for the if which has only single statement. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Lauri Kasanen <cand@gmx.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-21n64: use sector SECTOR_SHIFT instead 512Chaitanya Kulkarni
Instead of using magic numbers use SECTOR_SHIFT to get the number of sectors from the size. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Lauri Kasanen <cand@gmx.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-21n64: use enums for regChaitanya Kulkarni
Macros tend to be not type-safe. Use enum for register definitions. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Lauri Kasanen <cand@gmx.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-21n64: move module param at the topChaitanya Kulkarni
Move module parameters at the top of the file after macro definition & global variables below macro definitions just like we have for other modules. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Lauri Kasanen <cand@gmx.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-21n64: move module info at the endChaitanya Kulkarni
Move the module auth, description, and license at the end of the file just like what we have for the other modules. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Lauri Kasanen <cand@gmx.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-21n64: use pr_fmt to avoid duplicate stringChaitanya Kulkarni
Instead of repeating the n64cart string all over the module use pr_fmt macro and remove the duplicate string. Also, replace and with or in the one of the error message. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Lauri Kasanen <cand@gmx.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-21block: Add n64 cart driverLauri Kasanen
This adds support for the Nintendo 64 console's carts. Carts are a read-only media ranging from 8mb to 64mb. Only one cart can be connected at once, and switching it requires a reboot. No module support to save RAM, as the target has 8mb RAM. Signed-off-by: Lauri Kasanen <cand@gmx.com> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>