[SCSI] jazz_esp: Converted to use esp_core.

obj-$(CONFIG_SCSI_3W_9XXX)	+= 3w-9xxx.o

obj-$(CONFIG_SCSI_PPA)		+= ppa.o

obj-$(CONFIG_SCSI_IMM)		+= imm.o

obj-$(CONFIG_JAZZ_ESP)		+= NCR53C9x.o	jazz_esp.o

obj-$(CONFIG_JAZZ_ESP)		+= esp_scsi.o	jazz_esp.o

obj-$(CONFIG_SUN3X_ESP)		+= NCR53C9x.o	sun3x_esp.o

obj-$(CONFIG_SCSI_FCAL)		+= fcal.o

obj-$(CONFIG_SCSI_LASI700)	+= 53c700.o lasi700.o

/*

 * 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.

				 */

#include <scsi/scsi_host.h>

#include "esp_scsi.h"

#define DRV_MODULE_NAME		"jazz_esp"

#define PFX DRV_MODULE_NAME	": "

#define DRV_VERSION		"1.000"

#define DRV_MODULE_RELDATE	"May 19, 2007"

static int jazz_esp_release(struct Scsi_Host *shost)

static void jazz_esp_write8(struct esp *esp, u8 val, unsigned long reg)

{

	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;

	*(volatile u8 *)(esp->regs + reg) = val;

}

/***************************************************************** Detection */

static int jazz_esp_detect(struct scsi_host_template *tpnt)

static u8 jazz_esp_read8(struct esp *esp, unsigned long reg)

{

    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;

	/* 

	 * 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;

	return *(volatile u8 *)(esp->regs + reg);

}

/************************************************************* DMA Functions */

static int dma_bytes_sent(struct NCR_ESP *esp, int fifo_count)

static dma_addr_t jazz_esp_map_single(struct esp *esp, void *buf,

				      size_t sz, int dir)

{

    return fifo_count;

	return dma_map_single(esp->dev, buf, sz, dir);

}

static int dma_can_transfer(struct NCR_ESP *esp, struct scsi_cmnd *sp)

static int jazz_esp_map_sg(struct esp *esp, struct scatterlist *sg,

				  int num_sg, int dir)

{

    /*

     * maximum DMA size is 1MB

     */

    unsigned long sz = sp->SCp.this_residual;

    if(sz > 0x100000)

	sz = 0x100000;

    return sz;

	return dma_map_sg(esp->dev, sg, num_sg, dir);

}

static void dma_dump_state(struct NCR_ESP *esp)

static void jazz_esp_unmap_single(struct esp *esp, dma_addr_t addr,

				  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)));

	dma_unmap_single(esp->dev, addr, sz, dir);

}

static void dma_init_read(struct NCR_ESP *esp, __u32 vaddress, int length)

static void jazz_esp_unmap_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);

	dma_unmap_sg(esp->dev, sg, num_sg, dir);

}

static void dma_init_write(struct NCR_ESP *esp, __u32 vaddress, int length)

static int jazz_esp_irq_pending(struct esp *esp)

{

    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);    

	if (jazz_esp_read8(esp, ESP_STATUS) & ESP_STAT_INTR)

		return 1;

	return 0;

}

static void dma_ints_off(struct NCR_ESP *esp)

static void jazz_esp_reset_dma(struct esp *esp)

{

    disable_irq(esp->irq);

	vdma_disable ((int)esp->dma_regs);

}

static void dma_ints_on(struct NCR_ESP *esp)

static void jazz_esp_dma_drain(struct esp *esp)

{

    enable_irq(esp->irq);

	/* nothing to do */

}

static int dma_irq_p(struct NCR_ESP *esp)

static void jazz_esp_dma_invalidate(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_send_dma_cmd(struct esp *esp, u32 addr, u32 esp_count,

				  u32 dma_count, int write, u8 cmd)

{

    int enable = vdma_get_enable((int)esp->dregs);

	BUG_ON(!(cmd & ESP_CMD_DMA));

    return (enable & R4030_CHNL_ENABLE);

}

	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);

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);

    }

}

	vdma_set_addr ((int)esp->dma_regs, addr);

	vdma_set_count ((int)esp->dma_regs, dma_count);

	vdma_enable ((int)esp->dma_regs);

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);

	scsi_esp_cmd(esp, cmd);

}

static void dma_mmu_get_scsi_sgl (struct NCR_ESP *esp, struct scsi_cmnd *sp)

static int jazz_esp_dma_error(struct esp *esp)

{

    int sz = sp->SCp.buffers_residual;

    struct scatterlist *sg = (struct scatterlist *) sp->SCp.buffer;

	u32 enable = vdma_get_enable((int)esp->dma_regs);

    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);

}    

	if (enable & (R4030_MEM_INTR|R4030_ADDR_INTR))

		return 1;

static void dma_mmu_release_scsi_one (struct NCR_ESP *esp, struct scsi_cmnd *sp)

{

    vdma_free(sp->SCp.have_data_in);

	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;

	struct scsi_host_template *tpnt = &scsi_esp_template;

	struct Scsi_Host *host;

	struct esp *esp;

	struct resource *res;

	int err;

    while(sz >= 0) {

	vdma_free(sg[sz].dma_address);

	sz--;

    }

	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)

static void __exit jazz_esp_exit(void)

{

#if 0    

    *(unsigned char *)JAZZ_HDC_LED = 1;

#endif    

	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);