[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/drivers/scsi/mvme147.c b/src/kernel/linux/v4.19/drivers/scsi/mvme147.c
new file mode 100644
index 0000000..7d1ab41
--- /dev/null
+++ b/src/kernel/linux/v4.19/drivers/scsi/mvme147.c
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/mvme147hw.h>
+#include <asm/irq.h>
+
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+#include "wd33c93.h"
+#include "mvme147.h"
+
+static irqreturn_t mvme147_intr(int irq, void *data)
+{
+ struct Scsi_Host *instance = data;
+
+ if (irq == MVME147_IRQ_SCSI_PORT)
+ wd33c93_intr(instance);
+ else
+ m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
+ return IRQ_HANDLED;
+}
+
+static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
+{
+ struct Scsi_Host *instance = cmd->device->host;
+ struct WD33C93_hostdata *hdata = shost_priv(instance);
+ unsigned char flags = 0x01;
+ unsigned long addr = virt_to_bus(cmd->SCp.ptr);
+
+ /* setup dma direction */
+ if (!dir_in)
+ flags |= 0x04;
+
+ /* remember direction */
+ hdata->dma_dir = dir_in;
+
+ if (dir_in) {
+ /* invalidate any cache */
+ cache_clear(addr, cmd->SCp.this_residual);
+ } else {
+ /* push any dirty cache */
+ cache_push(addr, cmd->SCp.this_residual);
+ }
+
+ /* start DMA */
+ m147_pcc->dma_bcr = cmd->SCp.this_residual | (1 << 24);
+ m147_pcc->dma_dadr = addr;
+ m147_pcc->dma_cntrl = flags;
+
+ /* return success */
+ return 0;
+}
+
+static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
+ int status)
+{
+ m147_pcc->dma_cntrl = 0;
+}
+
+static struct scsi_host_template mvme147_host_template = {
+ .module = THIS_MODULE,
+ .proc_name = "MVME147",
+ .name = "MVME147 built-in SCSI",
+ .queuecommand = wd33c93_queuecommand,
+ .eh_abort_handler = wd33c93_abort,
+ .eh_host_reset_handler = wd33c93_host_reset,
+ .show_info = wd33c93_show_info,
+ .write_info = wd33c93_write_info,
+ .can_queue = CAN_QUEUE,
+ .this_id = 7,
+ .sg_tablesize = SG_ALL,
+ .cmd_per_lun = CMD_PER_LUN,
+ .use_clustering = ENABLE_CLUSTERING
+};
+
+static struct Scsi_Host *mvme147_shost;
+
+static int __init mvme147_init(void)
+{
+ wd33c93_regs regs;
+ struct WD33C93_hostdata *hdata;
+ int error = -ENOMEM;
+
+ if (!MACH_IS_MVME147)
+ return 0;
+
+ mvme147_shost = scsi_host_alloc(&mvme147_host_template,
+ sizeof(struct WD33C93_hostdata));
+ if (!mvme147_shost)
+ goto err_out;
+ mvme147_shost->base = 0xfffe4000;
+ mvme147_shost->irq = MVME147_IRQ_SCSI_PORT;
+
+ regs.SASR = (volatile unsigned char *)0xfffe4000;
+ regs.SCMD = (volatile unsigned char *)0xfffe4001;
+
+ hdata = shost_priv(mvme147_shost);
+ hdata->no_sync = 0xff;
+ hdata->fast = 0;
+ hdata->dma_mode = CTRL_DMA;
+
+ wd33c93_init(mvme147_shost, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
+
+ error = request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0,
+ "MVME147 SCSI PORT", mvme147_shost);
+ if (error)
+ goto err_unregister;
+ error = request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0,
+ "MVME147 SCSI DMA", mvme147_shost);
+ if (error)
+ goto err_free_irq;
+#if 0 /* Disabled; causes problems booting */
+ m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
+ udelay(100);
+ m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
+ udelay(2000);
+ m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
+#endif
+ m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
+
+ m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
+ m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
+
+ error = scsi_add_host(mvme147_shost, NULL);
+ if (error)
+ goto err_free_irq;
+ scsi_scan_host(mvme147_shost);
+ return 0;
+
+err_free_irq:
+ free_irq(MVME147_IRQ_SCSI_PORT, mvme147_shost);
+err_unregister:
+ scsi_host_put(mvme147_shost);
+err_out:
+ return error;
+}
+
+static void __exit mvme147_exit(void)
+{
+ scsi_remove_host(mvme147_shost);
+
+ /* XXX Make sure DMA is stopped! */
+ free_irq(MVME147_IRQ_SCSI_PORT, mvme147_shost);
+ free_irq(MVME147_IRQ_SCSI_DMA, mvme147_shost);
+
+ scsi_host_put(mvme147_shost);
+}
+
+module_init(mvme147_init);
+module_exit(mvme147_exit);