---
drivers/block/Kconfig | 9 +
drivers/block/Makefile | 1 +
drivers/block/sxs.c | 491 ++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 501 insertions(+)
create mode 100644 drivers/block/sxs.c
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index 014a1cf..50ed13e 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -356,6 +356,15 @@ config BLK_DEV_SX8
Use devices /dev/sx8/$N and /dev/sx8/$Np$M.
+config BLK_DEV_SXS
+ tristate "Sony SxS card support"
+ depends on PCI
+ ---help---
+ Saying Y or M here will enable support for reading
+ from Sony SxS cards.
+
+ It creates a device called /dev/sxs
+
config BLK_DEV_RAM
tristate "RAM block device support"
---help---
diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index 02b688d..1e10fb6 100644
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_VIRTIO_BLK) += virtio_blk.o
obj-$(CONFIG_BLK_DEV_SX8) += sx8.o
obj-$(CONFIG_BLK_DEV_HD) += hd.o
+obj-$(CONFIG_BLK_DEV_SXS) += sxs.o
obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += xen-blkfront.o
obj-$(CONFIG_XEN_BLKDEV_BACKEND) += xen-blkback/
diff --git a/drivers/block/sxs.c b/drivers/block/sxs.c
new file mode 100644
index 0000000..fa5588d
--- /dev/null
+++ b/drivers/block/sxs.c
@@ -0,0 +1,491 @@
+/*
+ * sxs.c: Driver for Sony SxS cards
+ *
+ * Copyright 2014 Kieran Kunhya
+ *
+ * Author/maintainer: Kieran Kunhya <kie...@kunhya.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/blkdev.h>
+#include <linux/genhd.h>
+#include <linux/hdreg.h>
+#include <linux/bio.h>
+
+#include <linux/completion.h>
+#include <linux/dma-mapping.h>
+#include <linux/log2.h>
+
+#include <asm/byteorder.h>
+
+#define DRV_NAME "sxs"
+
+#define PCI_DEVICE_ID_SXS_81CE 0x81ce
+#define PCI_DEVICE_ID_SXS_905C 0x905c
+
+#define SXS_MASTER_LINK_REG_L 0x10
+#define SXS_MASTER_LINK_REG_H 0x14
+#define SXS_MASTER_ADDR_REG_L 0x18
+#define SXS_MASTER_ADDR_REG_H 0x1c
+#define SXS_MASTER_SIZE_REG 0x20
+#define SXS_ENABLE_REG 0x28
+#define SXS_CONTROL_REG 0x2c
+#define SXS_STATUS_REG 0x6c
+#define SXS_RESPONSE_BUF 0x40
+
+#define KERNEL_SECTOR_SIZE 512
+
+static struct pci_device_id ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_SONY, PCI_DEVICE_ID_SXS_81CE), },
+ { PCI_DEVICE(PCI_VENDOR_ID_SONY, PCI_DEVICE_ID_SXS_905C), },
+ { 0, }
+};
+MODULE_DEVICE_TABLE(pci, ids);
+
+struct sxs_device {
+ struct pci_dev *pci_dev;
+ spinlock_t lock;
+ void __iomem *mmio;
+
+ int sxs_major;
+ struct gendisk *disk;
+ int sector_size;
+ int num_sectors;
+ int sector_shift;
+ struct request_queue *queue;
+
+ struct completion irq_response;
+};
+
+static int sxs_getgeo(struct block_device *bdev, struct hd_geometry *geo)
+{
+ struct sxs_device *dev = bdev->bd_disk->private_data;
+ long size;
+
+ /* Make something up here */
+ size = dev->num_sectors*(dev->sector_size/KERNEL_SECTOR_SIZE);
+ geo->cylinders = (size & ~0x3f) >> 6;
+ geo->heads = 4;
+ geo->sectors = 16;
+
+ return 0;
+}
+
+static const struct block_device_operations sxs_opts = {
+ .owner = THIS_MODULE,
+ .getgeo = sxs_getgeo
+};
+
+static void test_read(struct sxs_device *dev, unsigned long sector,
+ unsigned long nsect, char *buffer)
+{
+ struct pci_dev *pdev = dev->pci_dev;
+ u32 status;
+ u32 data[4];
+ u16 *tmp;
+ u32 *tmp2;
+
+ void *dma2;
+ dma_addr_t dma2_handle;
+ void *dma3;
+ dma_addr_t dma3_handle;
+
+ sector >>= dev->sector_shift;
+ nsect >>= dev->sector_shift;
+
+ /* Read */
+ dma2 = pci_alloc_consistent(pdev, 8192, &dma2_handle);
+ memset(dma2, 0, 8192);
+
+ dma3 = pci_alloc_consistent(pdev, 8192, &dma3_handle);
+ memset(dma3, 0, 8192);
+
+ tmp = dma2;
+ tmp2 = dma3;
+ tmp2[0] = dma2_handle;
+ tmp2[2] = dma3_handle;
+
+ printk_ratelimited(KERN_DEBUG"CALL %lu %lu\n",
+ sector & 0xffffffff, nsect & 0xffffffff);
+
+ INIT_COMPLETION(dev->irq_response);
+ status = readl(dev->mmio+SXS_STATUS_REG);
+ data[0] = cpu_to_le32(0x00010028);
+ data[1] = cpu_to_le32(sector & 0xffffffff);
+ data[2] = 0x0;
+ data[3] = cpu_to_le32(nsect & 0xffffffff);
+ memcpy_toio(dev->mmio, data, sizeof(data));
+ writel(0xa0, dev->mmio+SXS_ENABLE_REG);
+ writel(0x80, dev->mmio+SXS_CONTROL_REG);
+
+ if (!wait_for_completion_timeout(&dev->irq_response,
+ msecs_to_jiffies(5000))) {
+ pr_debug("No IRQ\n");
+ }
+
+ INIT_COMPLETION(dev->irq_response);
+ writel(dma3_handle, dev->mmio+SXS_MASTER_LINK_REG_L);
+ writel(0x0, dev->mmio+SXS_MASTER_LINK_REG_H);
+ writel(0x20, dev->mmio+SXS_CONTROL_REG);
+
+ if (!wait_for_completion_timeout(&dev->irq_response,
+ msecs_to_jiffies(5000))) {
+ pr_debug("No IRQ\n");
+ }
+
+ /* FIXME: Use DMA properly */
+ memcpy(buffer, dma2, dev->sector_size * nsect);
+
+ printk_ratelimited(KERN_DEBUG"boot-signature %x\n", tmp[255]);
+
+ writel(0, dev->mmio+SXS_ENABLE_REG);
+
+ pci_free_consistent(pdev, 8192, dma3, dma3_handle);
+ pci_free_consistent(pdev, 8192, dma2, dma2_handle);
+}
+
+static void sxs_request(struct request_queue *q, struct bio *bio)
+{
+ int i;
+ struct bio_vec *bvec;
+ char *buffer;
+ unsigned long flags;
+ struct sxs_device *dev = q->queuedata;
+ sector_t sector = bio->bi_sector;
+
+ bio_for_each_segment(bvec, bio, i) {
+ printk_ratelimited(KERN_DEBUG"REQUEST %i %i %i\n",
+ bio_cur_bytes(bio), bio->bi_vcnt,
+ bvec->bv_len);
+ buffer = bvec_kmap_irq(bvec, &flags);
+ test_read(dev, sector, bio_cur_bytes(bio) >> 9, buffer);
+ sector += bio_cur_bytes(bio) >> 9;
+ bvec_kunmap_irq(buffer, &flags);
+ }
+
+ bio_endio(bio, 0);
+}
+
+static int setup_disk(struct sxs_device *dev)
+{
+ int ret = 0;
+
+ dev->sxs_major = register_blkdev(0, "sxs");
+ if (!dev->sxs_major) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ dev->queue = blk_alloc_queue(GFP_KERNEL);
+ if (!dev->queue) {
+ ret = -ENOMEM;
+ goto end;
+ }
+
+ blk_queue_make_request(dev->queue, sxs_request);
+ blk_queue_logical_block_size(dev->queue, dev->sector_size);
+ dev->queue->queuedata = dev;
+
+ /* XXX: can SxS have more partitions? */
+ dev->disk = alloc_disk(4);
+ if (!dev->disk) {
+ pr_notice("could not allocate disk\n");
+ goto end;
+ }
+ dev->disk->major = dev->sxs_major;
+ dev->disk->first_minor = 0;
+ dev->disk->fops = &sxs_opts;
+ dev->disk->queue = dev->queue;
+ dev->disk->private_data = dev;
+ snprintf(dev->disk->disk_name, 32, "sxs");
+ set_capacity(dev->disk, dev->num_sectors*
+ (dev->sector_size/KERNEL_SECTOR_SIZE));
+ add_disk(dev->disk);
+
+end:
+ return ret;
+}
+
+static void read_response_buf(void __iomem *mmio, u32 *output)
+{
+ memcpy_fromio(output, mmio+SXS_RESPONSE_BUF, 4*4);
+}
+
+static int is_write_protected(struct sxs_device *dev)
+{
+ u32 status;
+
+ status = readl(dev->mmio+SXS_STATUS_REG);
+
+ return (status >> 8) & 1;
+}
+
+/* Setup the card exactly as the Windows driver does,
+ * even the strange parts! */
+static int boot_check(struct sxs_device *dev)
+{
+ int i, ret = 0;
+ u32 status;
+ u32 output[4];
+
+ status = readl(dev->mmio+SXS_STATUS_REG);
+ pr_debug("STATUS: %x", status);
+
+ if ((status & 0xa0) != 0xa0) {
+ if ((status & 0xff) != 0x20)
+ writel(1, dev->mmio+SXS_CONTROL_REG);
+
+ for (i = 0; i < 40; i++) {
+ status = readl(dev->mmio+SXS_STATUS_REG);
+ if (status & 0x80)
+ break;
+ msleep(100);
+ }
+ if (i == 40)
+ ret = -EBUSY;
+ else {
+ read_response_buf(dev->mmio, output);
+ /* Not clear what these values mean */
+ pr_debug("Boot Response %x %x %x %x\n",
+ output[0], output[1],
+ output[2], output[3]);
+ }
+ }
+
+ return ret;
+}
+
+static irqreturn_t sxs_irq(int irq, void *data)
+{
+ u32 status;
+ irqreturn_t ret = IRQ_HANDLED;
+ struct sxs_device *dev = data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->lock, flags);
+
+ status = readl(dev->mmio+SXS_STATUS_REG);
+
+ if (status != 0x80000000)
+ writel(0x80000000, dev->mmio+SXS_STATUS_REG);
+
+ printk_ratelimited(KERN_DEBUG"IRQ\n");
+
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ complete(&dev->irq_response);
+
+ return ret;
+}
+
+static void setup_card(struct sxs_device *dev)
+{
+ u32 status;
+ u32 data[4];
+
+ status = readl(dev->mmio+SXS_STATUS_REG);
+ memset(data, 0, sizeof(data));
+
+ memcpy_toio(dev->mmio, data, sizeof(data));
+ writel(0xa0, dev->mmio+SXS_ENABLE_REG);
+ writel(0x80, dev->mmio+SXS_CONTROL_REG);
+
+ if (!wait_for_completion_timeout(&dev->irq_response,
+ msecs_to_jiffies(1000))) {
+ pr_debug("No IRQ\n");
+ }
+
+ writel(0, dev->mmio+SXS_ENABLE_REG);
+}
+
+static int get_size(struct sxs_device *dev)
+{
+ struct pci_dev *pdev = dev->pci_dev;
+ u32 status;
+ u32 data[4];
+ int ret = 0;
+ u32 *tmp2;
+
+ void *dma;
+ dma_addr_t dma_handle;
+
+ dma = pci_alloc_consistent(pdev, 8192, &dma_handle);
+ memset(dma, 0, 8192);
+
+ INIT_COMPLETION(dev->irq_response);
+ status = readl(dev->mmio+SXS_STATUS_REG);
+ data[0] = cpu_to_le32(0x8);
+ data[1] = 0x0;
+ data[2] = 0x0;
+ data[3] = cpu_to_le32(0x1);
+ memcpy_toio(dev->mmio, data, sizeof(data));
+ writel(0xa0, dev->mmio+SXS_ENABLE_REG);
+ writel(0x80, dev->mmio+SXS_CONTROL_REG);
+
+ if (!wait_for_completion_timeout(&dev->irq_response,
+ msecs_to_jiffies(1000))) {
+ pr_debug("No IRQ\n");
+ return -EIO;
+ }
+
+ INIT_COMPLETION(dev->irq_response);
+ writel(dma_handle, dev->mmio+SXS_MASTER_ADDR_REG_L);
+ writel(0x0, dev->mmio+SXS_MASTER_ADDR_REG_H);
+ writel(0x800, dev->mmio+SXS_MASTER_SIZE_REG);
+ writel(0x20, dev->mmio+SXS_CONTROL_REG);
+
+ if (!wait_for_completion_timeout(&dev->irq_response,
+ msecs_to_jiffies(1000))) {
+ pr_debug("No IRQ\n");
+ ret = -EIO;
+ goto error1;
+ }
+
+ tmp2 = dma;
+
+ writel(0, dev->mmio+SXS_ENABLE_REG);
+
+ /* XXX: this might be different for larger disks */
+ dev->sector_size = le32_to_cpu(tmp2[8]) & 0xffff;
+ dev->num_sectors = le32_to_cpu(tmp2[9]) * le32_to_cpu(tmp2[10]);
+ dev->sector_shift = ilog2(dev->sector_size /
+ KERNEL_SECTOR_SIZE);
+ pr_debug("Sector size: %x Num sectors: %x\n",
+ dev->sector_size, dev->num_sectors);
+
+error1:
+ pci_free_consistent(pdev, 8192, dma, dma_handle);
+
+ return ret;
+}
+
+static int probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ int error = 0;
+ struct sxs_device *dev;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ goto error1;
+ spin_lock_init(&dev->lock);
+ dev->pci_dev = pdev;
+
+ error = pci_enable_device(pdev);
+ if (error < 0)
+ goto error2;
+
+ pci_enable_msi(pdev);
+
+ error = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (error)
+ goto error3;
+
+ error = pci_request_regions(pdev, DRV_NAME);
+ if (error)
+ goto error3;
+
+ dev->mmio = pci_ioremap_bar(pdev, 0);
+ if (!dev->mmio)
+ goto error4;
+
+ pci_set_master(pdev);
+
+ if (request_irq(pdev->irq, &sxs_irq, IRQF_SHARED, DRV_NAME, dev))
+ goto error5;
+
+ if (boot_check(dev) < 0)
+ goto error6;
+
+ init_completion(&dev->irq_response);
+
+ setup_card(dev);
+
+ if (get_size(dev) < 0)
+ goto error6;
+
+ if (setup_disk(dev) < 0)
+ goto error7;
+
+ pci_set_drvdata(pdev, dev);
+
+ pr_debug("sxs driver successfully loaded\n");
+ return 0;
+
+error7:
+ if (dev->sxs_major)
+ unregister_blkdev(dev->sxs_major, "sxs");
+
+ if (dev->disk) {
+ del_gendisk(dev->disk);
+ put_disk(dev->disk);
+ }
+
+ if (dev->queue)
+ blk_cleanup_queue(dev->queue);
+error6:
+ free_irq(pdev->irq, dev);
+error5:
+ iounmap(dev->mmio);
+error4:
+ pci_release_regions(pdev);
+error3:
+ pci_disable_device(pdev);
+error2:
+ kfree(dev);
+error1:
+ return error;
+}
+
+static void remove(struct pci_dev *pdev)
+{
+ struct sxs_device *dev = pci_get_drvdata(pdev);
+
+ if (dev->sxs_major)
+ unregister_blkdev(dev->sxs_major, "sxs");
+
+ if (dev->disk) {
+ del_gendisk(dev->disk);
+ put_disk(dev->disk);
+ }
+ if (dev->queue)
+ blk_cleanup_queue(dev->queue);
+ free_irq(pdev->irq, dev);
+ iounmap(dev->mmio);
+ pci_release_regions(pdev);
+ pci_disable_msi(pdev);
+ pci_disable_device(pdev);
+ kfree(dev);
+}
+
+static struct pci_driver sxs_driver = {
+ .name = DRV_NAME,
+ .id_table = ids,
+ .probe = probe,
+ .remove = remove,
+};
+
+static int __init sxs_init(void)
+{
+ return pci_register_driver(&sxs_driver);
+}
+
+static void __exit sxs_exit(void)
+{
+ pci_unregister_driver(&sxs_driver);
+}
+
+MODULE_AUTHOR("Kieran Kunhya");
+MODULE_LICENSE("GPL");
+
+module_init(sxs_init);
+module_exit(sxs_exit);
--
1.7.9.5
--
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