Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 329 insertions, 0 deletions

diff --git a/drivers/scsi/jazz_esp.c b/drivers/scsi/jazz_esp.c
new file mode 100644
index 000000000000..a642f736cf85
--- /dev/null
+++ b/drivers/scsi/jazz_esp.c
@@ -0,0 +1,329 @@
+/*
+ * jazz_esp.c: Driver for SCSI chip on Mips Magnum Boards (JAZZ architecture)
+ *
+ * Copyright (C) 1997 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
+ *
+ * jazz_esp is based on David S. Miller's ESP driver and cyber_esp
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/blkdev.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+#include "NCR53C9x.h"
+
+#include <asm/irq.h>
+#include <asm/jazz.h>
+#include <asm/jazzdma.h>
+#include <asm/dma.h>
+
+#include <asm/pgtable.h>
+
+static int  dma_bytes_sent(struct NCR_ESP *esp, int fifo_count);
+static int  dma_can_transfer(struct NCR_ESP *esp, struct scsi_cmnd *sp);
+static void dma_dump_state(struct NCR_ESP *esp);
+static void dma_init_read(struct NCR_ESP *esp, __u32 vaddress, int length);
+static void dma_init_write(struct NCR_ESP *esp, __u32 vaddress, int length);
+static void dma_ints_off(struct NCR_ESP *esp);
+static void dma_ints_on(struct NCR_ESP *esp);
+static int  dma_irq_p(struct NCR_ESP *esp);
+static int  dma_ports_p(struct NCR_ESP *esp);
+static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write);
+static void dma_mmu_get_scsi_one (struct NCR_ESP *esp, struct scsi_cmnd *sp);
+static void dma_mmu_get_scsi_sgl (struct NCR_ESP *esp, struct scsi_cmnd *sp);
+static void dma_mmu_release_scsi_one (struct NCR_ESP *esp, struct scsi_cmnd *sp);
+static void dma_mmu_release_scsi_sgl (struct NCR_ESP *esp, struct scsi_cmnd *sp);
+static void dma_advance_sg (struct scsi_cmnd *sp);
+static void dma_led_off(struct NCR_ESP *);
+static void dma_led_on(struct NCR_ESP *);
+
+
+static volatile unsigned char cmd_buffer[16];
+                                /* This is where all commands are put
+                                 * before they are trasfered to the ESP chip
+                                 * via PIO.
+                                 */
+
+int jazz_esp_detect(Scsi_Host_Template *tpnt);
+static int jazz_esp_release(struct Scsi_Host *shost)
+{
+        if (shost->irq)
+                free_irq(shost->irq, NULL);
+        if (shost->dma_channel != 0xff)
+                free_dma(shost->dma_channel);
+        if (shost->io_port && shost->n_io_port)
+                release_region(shost->io_port, shost->n_io_port);
+        scsi_unregister(shost);
+        return 0;
+}
+
+static Scsi_Host_Template driver_template = {
+        .proc_name              = "jazz_esp",
+        .proc_info              = &esp_proc_info,
+        .name                   = "ESP 100/100a/200",
+        .detect                 = jazz_esp_detect,
+        .slave_alloc            = esp_slave_alloc,
+        .slave_destroy          = esp_slave_destroy,
+        .release                = jazz_esp_release,
+        .info                   = esp_info,
+        .queuecommand           = esp_queue,
+        .eh_abort_handler       = esp_abort,
+        .eh_bus_reset_handler   = esp_reset,
+        .can_queue              = 7,
+        .this_id                = 7,
+        .sg_tablesize           = SG_ALL,
+        .cmd_per_lun            = 1,
+        .use_clustering         = DISABLE_CLUSTERING,
+};
+
+#include "scsi_module.c"
+
+/***************************************************************** Detection */
+static int jazz_esp_detect(struct scsi_host_template *tpnt)
+{
+    struct NCR_ESP *esp;
+    struct ConfigDev *esp_dev;
+
+    /*
+     * first assumption it is there:-)
+     */
+    if (1) {
+        esp_dev = 0;
+        esp = esp_allocate(tpnt, (void *) esp_dev);
+        
+        /* Do command transfer with programmed I/O */
+        esp->do_pio_cmds = 1;
+        
+        /* Required functions */
+        esp->dma_bytes_sent = &dma_bytes_sent;
+        esp->dma_can_transfer = &dma_can_transfer;
+        esp->dma_dump_state = &dma_dump_state;
+        esp->dma_init_read = &dma_init_read;
+        esp->dma_init_write = &dma_init_write;
+        esp->dma_ints_off = &dma_ints_off;
+        esp->dma_ints_on = &dma_ints_on;
+        esp->dma_irq_p = &dma_irq_p;
+        esp->dma_ports_p = &dma_ports_p;
+        esp->dma_setup = &dma_setup;
+
+        /* Optional functions */
+        esp->dma_barrier = 0;
+        esp->dma_drain = 0;
+        esp->dma_invalidate = 0;
+        esp->dma_irq_entry = 0;
+        esp->dma_irq_exit = 0;
+        esp->dma_poll = 0;
+        esp->dma_reset = 0;
+        esp->dma_led_off = &dma_led_off;
+        esp->dma_led_on = &dma_led_on;
+        
+        /* virtual DMA functions */
+        esp->dma_mmu_get_scsi_one = &dma_mmu_get_scsi_one;
+        esp->dma_mmu_get_scsi_sgl = &dma_mmu_get_scsi_sgl;
+        esp->dma_mmu_release_scsi_one = &dma_mmu_release_scsi_one;
+        esp->dma_mmu_release_scsi_sgl = &dma_mmu_release_scsi_sgl;
+        esp->dma_advance_sg = &dma_advance_sg;
+
+
+        /* SCSI chip speed */
+        esp->cfreq = 40000000;
+
+        /* 
+         * we don't give the address of DMA channel, but the number
+         * of DMA channel, so we can use the jazz DMA functions
+         * 
+         */
+        esp->dregs = JAZZ_SCSI_DMA;
+        
+        /* ESP register base */
+        esp->eregs = (struct ESP_regs *)(JAZZ_SCSI_BASE);
+        
+        /* Set the command buffer */
+        esp->esp_command = (volatile unsigned char *)cmd_buffer;
+        
+        /* get virtual dma address for command buffer */
+        esp->esp_command_dvma = vdma_alloc(CPHYSADDR(cmd_buffer), sizeof (cmd_buffer));
+        
+        esp->irq = JAZZ_SCSI_IRQ;
+        request_irq(JAZZ_SCSI_IRQ, esp_intr, SA_INTERRUPT, "JAZZ SCSI",
+                    esp->ehost);
+
+        /*
+         * FIXME, look if the scsi id is available from NVRAM
+         */
+        esp->scsi_id = 7;
+                
+        /* Check for differential SCSI-bus */
+        /* What is this stuff? */
+        esp->diff = 0;
+
+        esp_initialize(esp);
+        
+        printk("ESP: Total of %d ESP hosts found, %d actually in use.\n", nesps,esps_in_use);
+        esps_running = esps_in_use;
+        return esps_in_use;
+    }
+    return 0;
+}
+
+/************************************************************* DMA Functions */
+static int dma_bytes_sent(struct NCR_ESP *esp, int fifo_count)
+{
+    return fifo_count;
+}
+
+static int dma_can_transfer(struct NCR_ESP *esp, struct scsi_cmnd *sp)
+{
+    /*
+     * maximum DMA size is 1MB
+     */
+    unsigned long sz = sp->SCp.this_residual;
+    if(sz > 0x100000)
+        sz = 0x100000;
+    return sz;
+}
+
+static void dma_dump_state(struct NCR_ESP *esp)
+{
+    
+    ESPLOG(("esp%d: dma -- enable <%08x> residue <%08x\n",
+            esp->esp_id, vdma_get_enable((int)esp->dregs), vdma_get_residue((int)esp->dregs)));
+}
+
+static void dma_init_read(struct NCR_ESP *esp, __u32 vaddress, int length)
+{
+    dma_cache_wback_inv ((unsigned long)phys_to_virt(vdma_log2phys(vaddress)), length);
+    vdma_disable ((int)esp->dregs);
+    vdma_set_mode ((int)esp->dregs, DMA_MODE_READ);
+    vdma_set_addr ((int)esp->dregs, vaddress);
+    vdma_set_count ((int)esp->dregs, length);
+    vdma_enable ((int)esp->dregs);
+}
+
+static void dma_init_write(struct NCR_ESP *esp, __u32 vaddress, int length)
+{
+    dma_cache_wback_inv ((unsigned long)phys_to_virt(vdma_log2phys(vaddress)), length);    
+    vdma_disable ((int)esp->dregs);    
+    vdma_set_mode ((int)esp->dregs, DMA_MODE_WRITE);
+    vdma_set_addr ((int)esp->dregs, vaddress);
+    vdma_set_count ((int)esp->dregs, length);
+    vdma_enable ((int)esp->dregs);    
+}
+
+static void dma_ints_off(struct NCR_ESP *esp)
+{
+    disable_irq(esp->irq);
+}
+
+static void dma_ints_on(struct NCR_ESP *esp)
+{
+    enable_irq(esp->irq);
+}
+
+static int dma_irq_p(struct NCR_ESP *esp)
+{
+    return (esp_read(esp->eregs->esp_status) & ESP_STAT_INTR);
+}
+
+static int dma_ports_p(struct NCR_ESP *esp)
+{
+    int enable = vdma_get_enable((int)esp->dregs);
+    
+    return (enable & R4030_CHNL_ENABLE);
+}
+
+static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write)
+{
+    /* 
+     * On the Sparc, DMA_ST_WRITE means "move data from device to memory"
+     * so when (write) is true, it actually means READ!
+     */
+    if(write){
+        dma_init_read(esp, addr, count);
+    } else {
+        dma_init_write(esp, addr, count);
+    }
+}
+
+static void dma_mmu_get_scsi_one (struct NCR_ESP *esp, struct scsi_cmnd *sp)
+{
+    sp->SCp.have_data_in = vdma_alloc(CPHYSADDR(sp->SCp.buffer), sp->SCp.this_residual);
+    sp->SCp.ptr = (char *)((unsigned long)sp->SCp.have_data_in);
+}
+
+static void dma_mmu_get_scsi_sgl (struct NCR_ESP *esp, struct scsi_cmnd *sp)
+{
+    int sz = sp->SCp.buffers_residual;
+    struct scatterlist *sg = (struct scatterlist *) sp->SCp.buffer;
+    
+    while (sz >= 0) {
+        sg[sz].dma_address = vdma_alloc(CPHYSADDR(page_address(sg[sz].page) + sg[sz].offset), sg[sz].length);
+        sz--;
+    }
+    sp->SCp.ptr=(char *)(sp->SCp.buffer->dma_address);
+}    
+
+static void dma_mmu_release_scsi_one (struct NCR_ESP *esp, struct scsi_cmnd *sp)
+{
+    vdma_free(sp->SCp.have_data_in);
+}
+
+static void dma_mmu_release_scsi_sgl (struct NCR_ESP *esp, struct scsi_cmnd *sp)
+{
+    int sz = sp->use_sg - 1;
+    struct scatterlist *sg = (struct scatterlist *)sp->buffer;
+                        
+    while(sz >= 0) {
+        vdma_free(sg[sz].dma_address);
+        sz--;
+    }
+}
+
+static void dma_advance_sg (struct scsi_cmnd *sp)
+{
+    sp->SCp.ptr = (char *)(sp->SCp.buffer->dma_address);
+}
+
+#define JAZZ_HDC_LED   0xe000d100 /* FIXME, find correct address */
+
+static void dma_led_off(struct NCR_ESP *esp)
+{
+#if 0    
+    *(unsigned char *)JAZZ_HDC_LED = 0;
+#endif    
+}
+
+static void dma_led_on(struct NCR_ESP *esp)
+{    
+#if 0    
+    *(unsigned char *)JAZZ_HDC_LED = 1;
+#endif    
+}
+
+static struct scsi_host_template driver_template = {
+        .proc_name              = "jazz_esp",
+        .proc_info              = esp_proc_info,
+        .name                   = "ESP 100/100a/200",
+        .detect                 = jazz_esp_detect,
+        .slave_alloc            = esp_slave_alloc,
+        .slave_destroy          = esp_slave_destroy,
+        .release                = jazz_esp_release,
+        .info                   = esp_info,
+        .queuecommand           = esp_queue,
+        .eh_abort_handler       = esp_abort,
+        .eh_bus_reset_handler   = esp_reset,
+        .can_queue              = 7,
+        .this_id                = 7,
+        .sg_tablesize           = SG_ALL,
+        .cmd_per_lun            = 1,
+        .use_clustering         = DISABLE_CLUSTERING,
+};
+#include "scsi_module.c"