-/*
- * jazz_esp.c: Driver for SCSI chip on Mips Magnum Boards (JAZZ architecture)
+/* jazz_esp.c: ESP front-end for MIPS JAZZ systems.
*
- * Copyright (C) 1997 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
- *
- * jazz_esp is based on David S. Miller's ESP driver and cyber_esp
+ * Copyright (C) 2007 Thomas Bogendörfer (tsbogend@alpha.frankende)
*/
-#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 <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/dma.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.
- */
-
-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;
-}
+#include <scsi/scsi_host.h>
-/***************************************************************** 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 = NULL;
- esp = esp_allocate(tpnt, esp_dev, 0);
-
- /* 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 = NULL;
- esp->dma_drain = NULL;
- esp->dma_invalidate = NULL;
- esp->dma_irq_entry = NULL;
- esp->dma_irq_exit = NULL;
- esp->dma_poll = NULL;
- esp->dma_reset = NULL;
- 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;
+#include "esp_scsi.h"
- /*
- * 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 = (void *) 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, IRQF_DISABLED, "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;
-}
+#define DRV_MODULE_NAME "jazz_esp"
+#define PFX DRV_MODULE_NAME ": "
+#define DRV_VERSION "1.000"
+#define DRV_MODULE_RELDATE "May 19, 2007"
-/************************************************************* DMA Functions */
-static int dma_bytes_sent(struct NCR_ESP *esp, int fifo_count)
+static void jazz_esp_write8(struct esp *esp, u8 val, unsigned long reg)
{
- return fifo_count;
+ *(volatile u8 *)(esp->regs + reg) = val;
}
-static int dma_can_transfer(struct NCR_ESP *esp, struct scsi_cmnd *sp)
+static u8 jazz_esp_read8(struct esp *esp, unsigned long reg)
{
- /*
- * maximum DMA size is 1MB
- */
- unsigned long sz = sp->SCp.this_residual;
- if(sz > 0x100000)
- sz = 0x100000;
- return sz;
+ return *(volatile u8 *)(esp->regs + reg);
}
-static void dma_dump_state(struct NCR_ESP *esp)
+static dma_addr_t jazz_esp_map_single(struct esp *esp, void *buf,
+ size_t sz, int dir)
{
-
- ESPLOG(("esp%d: dma -- enable <%08x> residue <%08x\n",
- esp->esp_id, vdma_get_enable((int)esp->dregs), vdma_get_residue((int)esp->dregs)));
+ return dma_map_single(esp->dev, buf, sz, dir);
}
-static void dma_init_read(struct NCR_ESP *esp, __u32 vaddress, int length)
+static int jazz_esp_map_sg(struct esp *esp, struct scatterlist *sg,
+ int num_sg, int dir)
{
- 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);
+ return dma_map_sg(esp->dev, sg, num_sg, dir);
}
-static void dma_init_write(struct NCR_ESP *esp, __u32 vaddress, int length)
+static void jazz_esp_unmap_single(struct esp *esp, dma_addr_t addr,
+ size_t sz, int dir)
{
- 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);
+ dma_unmap_single(esp->dev, addr, sz, dir);
}
-static void dma_ints_off(struct NCR_ESP *esp)
+static void jazz_esp_unmap_sg(struct esp *esp, struct scatterlist *sg,
+ int num_sg, int dir)
{
- disable_irq(esp->irq);
+ dma_unmap_sg(esp->dev, sg, num_sg, dir);
}
-static void dma_ints_on(struct NCR_ESP *esp)
+static int jazz_esp_irq_pending(struct esp *esp)
{
- enable_irq(esp->irq);
+ if (jazz_esp_read8(esp, ESP_STATUS) & ESP_STAT_INTR)
+ return 1;
+ return 0;
}
-static int dma_irq_p(struct NCR_ESP *esp)
+static void jazz_esp_reset_dma(struct esp *esp)
{
- return (esp_read(esp->eregs->esp_status) & ESP_STAT_INTR);
+ vdma_disable ((int)esp->dma_regs);
}
-static int dma_ports_p(struct NCR_ESP *esp)
+static void jazz_esp_dma_drain(struct esp *esp)
{
- int enable = vdma_get_enable((int)esp->dregs);
-
- return (enable & R4030_CHNL_ENABLE);
+ /* nothing to do */
}
-static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write)
+static void jazz_esp_dma_invalidate(struct esp *esp)
{
- /*
- * 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);
- }
+ vdma_disable ((int)esp->dma_regs);
}
-static void dma_mmu_get_scsi_one (struct NCR_ESP *esp, struct scsi_cmnd *sp)
+static void jazz_esp_send_dma_cmd(struct esp *esp, u32 addr, u32 esp_count,
+ u32 dma_count, int write, u8 cmd)
{
- 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);
+ BUG_ON(!(cmd & ESP_CMD_DMA));
+
+ jazz_esp_write8(esp, (esp_count >> 0) & 0xff, ESP_TCLOW);
+ jazz_esp_write8(esp, (esp_count >> 8) & 0xff, ESP_TCMED);
+ vdma_disable ((int)esp->dma_regs);
+ if (write)
+ vdma_set_mode ((int)esp->dma_regs, DMA_MODE_READ);
+ else
+ vdma_set_mode ((int)esp->dma_regs, DMA_MODE_WRITE);
+
+ vdma_set_addr ((int)esp->dma_regs, addr);
+ vdma_set_count ((int)esp->dma_regs, dma_count);
+ vdma_enable ((int)esp->dma_regs);
+
+ scsi_esp_cmd(esp, cmd);
}
-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)
+static int jazz_esp_dma_error(struct esp *esp)
{
- vdma_free(sp->SCp.have_data_in);
+ u32 enable = vdma_get_enable((int)esp->dma_regs);
+
+ if (enable & (R4030_MEM_INTR|R4030_ADDR_INTR))
+ return 1;
+
+ return 0;
}
-static void dma_mmu_release_scsi_sgl (struct NCR_ESP *esp, struct scsi_cmnd *sp)
+static const struct esp_driver_ops jazz_esp_ops = {
+ .esp_write8 = jazz_esp_write8,
+ .esp_read8 = jazz_esp_read8,
+ .map_single = jazz_esp_map_single,
+ .map_sg = jazz_esp_map_sg,
+ .unmap_single = jazz_esp_unmap_single,
+ .unmap_sg = jazz_esp_unmap_sg,
+ .irq_pending = jazz_esp_irq_pending,
+ .reset_dma = jazz_esp_reset_dma,
+ .dma_drain = jazz_esp_dma_drain,
+ .dma_invalidate = jazz_esp_dma_invalidate,
+ .send_dma_cmd = jazz_esp_send_dma_cmd,
+ .dma_error = jazz_esp_dma_error,
+};
+
+static int __devinit esp_jazz_probe(struct platform_device *dev)
{
- int sz = sp->use_sg - 1;
- struct scatterlist *sg = (struct scatterlist *)sp->request_buffer;
-
- while(sz >= 0) {
- vdma_free(sg[sz].dma_address);
- sz--;
- }
+ struct scsi_host_template *tpnt = &scsi_esp_template;
+ struct Scsi_Host *host;
+ struct esp *esp;
+ struct resource *res;
+ int err;
+
+ host = scsi_host_alloc(tpnt, sizeof(struct esp));
+
+ err = -ENOMEM;
+ if (!host)
+ goto fail;
+
+ host->max_id = 8;
+ esp = host_to_esp(host);
+
+ esp->host = host;
+ esp->dev = dev;
+ esp->ops = &jazz_esp_ops;
+
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!res)
+ goto fail_unlink;
+
+ esp->regs = (void __iomem *)res->start;
+ if (!esp->regs)
+ goto fail_unlink;
+
+ res = platform_get_resource(dev, IORESOURCE_MEM, 1);
+ if (!res)
+ goto fail_unlink;
+
+ esp->dma_regs = (void __iomem *)res->start;
+
+ esp->command_block = dma_alloc_coherent(esp->dev, 16,
+ &esp->command_block_dma,
+ GFP_KERNEL);
+ if (!esp->command_block)
+ goto fail_unmap_regs;
+
+ host->irq = platform_get_irq(dev, 0);
+ err = request_irq(host->irq, scsi_esp_intr, IRQF_SHARED, "ESP", esp);
+ if (err < 0)
+ goto fail_unmap_command_block;
+
+ esp->scsi_id = 7;
+ esp->host->this_id = esp->scsi_id;
+ esp->scsi_id_mask = (1 << esp->scsi_id);
+ esp->cfreq = 40000000;
+
+ dev_set_drvdata(&dev->dev, esp);
+
+ err = scsi_esp_register(esp, &dev->dev);
+ if (err)
+ goto fail_free_irq;
+
+ return 0;
+
+fail_free_irq:
+ free_irq(host->irq, esp);
+fail_unmap_command_block:
+ dma_free_coherent(esp->dev, 16,
+ esp->command_block,
+ esp->command_block_dma);
+fail_unmap_regs:
+fail_unlink:
+ scsi_host_put(host);
+fail:
+ return err;
}
-static void dma_advance_sg (struct scsi_cmnd *sp)
+static int __devexit esp_jazz_remove(struct platform_device *dev)
{
- sp->SCp.ptr = (char *)(sp->SCp.buffer->dma_address);
+ struct esp *esp = dev_get_drvdata(&dev->dev);
+ unsigned int irq = esp->host->irq;
+
+ scsi_esp_unregister(esp);
+
+ free_irq(irq, esp);
+ dma_free_coherent(esp->dev, 16,
+ esp->command_block,
+ esp->command_block_dma);
+
+ scsi_host_put(esp->host);
+
+ return 0;
}
-#define JAZZ_HDC_LED 0xe000d100 /* FIXME, find correct address */
+static struct platform_driver esp_jazz_driver = {
+ .probe = esp_jazz_probe,
+ .remove = __devexit_p(esp_jazz_remove),
+ .driver = {
+ .name = "jazz_esp",
+ },
+};
-static void dma_led_off(struct NCR_ESP *esp)
+static int __init jazz_esp_init(void)
{
-#if 0
- *(unsigned char *)JAZZ_HDC_LED = 0;
-#endif
+ return platform_driver_register(&esp_jazz_driver);
}
-static void dma_led_on(struct NCR_ESP *esp)
-{
-#if 0
- *(unsigned char *)JAZZ_HDC_LED = 1;
-#endif
+static void __exit jazz_esp_exit(void)
+{
+ platform_driver_unregister(&esp_jazz_driver);
}
-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"
+MODULE_DESCRIPTION("JAZZ ESP SCSI driver");
+MODULE_AUTHOR("Thomas Bogendoerfer (tsbogend@alpha.franken.de)");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
+module_init(jazz_esp_init);
+module_exit(jazz_esp_exit);
projects / platform / kernel / linux-exynos.git / commitdiff