| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Finn Thain | 2149 | 80.58% | 20 | 46.51% |
| Linus Torvalds (pre-git) | 353 | 13.24% | 4 | 9.30% |
| Linus Torvalds | 58 | 2.17% | 1 | 2.33% |
| Geert Uytterhoeven | 52 | 1.95% | 5 | 11.63% |
| Randy Dunlap | 16 | 0.60% | 1 | 2.33% |
| Bart Van Assche | 14 | 0.52% | 2 | 4.65% |
| Christoph Hellwig | 8 | 0.30% | 3 | 6.98% |
| Roman Zippel | 5 | 0.19% | 1 | 2.33% |
| Hannes Reinecke | 4 | 0.15% | 1 | 2.33% |
| Gustavo A. R. Silva | 4 | 0.15% | 1 | 2.33% |
| Sam Creasey | 1 | 0.04% | 1 | 2.33% |
| Henrik Kretzschmar | 1 | 0.04% | 1 | 2.33% |
| Thomas Gleixner | 1 | 0.04% | 1 | 2.33% |
| Adrian Bunk | 1 | 0.04% | 1 | 2.33% |
| Total | 2667 | 43 |
// SPDX-License-Identifier: GPL-2.0-only /* * Sun3 SCSI stuff by Erik Verbruggen (erik@bigmama.xtdnet.nl) * * Sun3 DMA routines added by Sam Creasey (sammy@sammy.net) * * VME support added by Sam Creasey * * TODO: modify this driver to support multiple Sun3 SCSI VME boards * * Adapted from mac_scsinew.c: */ /* * Generic Macintosh NCR5380 driver * * Copyright 1998, Michael Schmitz <mschmitz@lbl.gov> * * derived in part from: */ /* * Generic Generic NCR5380 driver * * Copyright 1995, Russell King */ #include <linux/types.h> #include <linux/delay.h> #include <linux/module.h> #include <linux/ioport.h> #include <linux/init.h> #include <linux/blkdev.h> #include <linux/platform_device.h> #include <asm/io.h> #include <asm/dvma.h> #include <scsi/scsi_host.h> /* minimum number of bytes to do dma on */ #define DMA_MIN_SIZE 129 /* Definitions for the core NCR5380 driver. */ #define NCR5380_implementation_fields /* none */ #define NCR5380_read(reg) in_8(hostdata->io + (reg)) #define NCR5380_write(reg, value) out_8(hostdata->io + (reg), value) #define NCR5380_queue_command sun3scsi_queue_command #define NCR5380_host_reset sun3scsi_host_reset #define NCR5380_abort sun3scsi_abort #define NCR5380_info sun3scsi_info #define NCR5380_dma_xfer_len sun3scsi_dma_xfer_len #define NCR5380_dma_recv_setup sun3scsi_dma_count #define NCR5380_dma_send_setup sun3scsi_dma_count #define NCR5380_dma_residual sun3scsi_dma_residual #include "NCR5380.h" /* dma regs start at regbase + 8, directly after the NCR regs */ struct sun3_dma_regs { unsigned short dma_addr_hi; /* vme only */ unsigned short dma_addr_lo; /* vme only */ unsigned short dma_count_hi; /* vme only */ unsigned short dma_count_lo; /* vme only */ unsigned short udc_data; /* udc dma data reg (obio only) */ unsigned short udc_addr; /* uda dma addr reg (obio only) */ unsigned short fifo_data; /* fifo data reg, * holds extra byte on odd dma reads */ unsigned short fifo_count; unsigned short csr; /* control/status reg */ unsigned short bpack_hi; /* vme only */ unsigned short bpack_lo; /* vme only */ unsigned short ivect; /* vme only */ unsigned short fifo_count_hi; /* vme only */ }; /* ucd chip specific regs - live in dvma space */ struct sun3_udc_regs { unsigned short rsel; /* select regs to load */ unsigned short addr_hi; /* high word of addr */ unsigned short addr_lo; /* low word */ unsigned short count; /* words to be xfer'd */ unsigned short mode_hi; /* high word of channel mode */ unsigned short mode_lo; /* low word of channel mode */ }; /* addresses of the udc registers */ #define UDC_MODE 0x38 #define UDC_CSR 0x2e /* command/status */ #define UDC_CHN_HI 0x26 /* chain high word */ #define UDC_CHN_LO 0x22 /* chain lo word */ #define UDC_CURA_HI 0x1a /* cur reg A high */ #define UDC_CURA_LO 0x0a /* cur reg A low */ #define UDC_CURB_HI 0x12 /* cur reg B high */ #define UDC_CURB_LO 0x02 /* cur reg B low */ #define UDC_MODE_HI 0x56 /* mode reg high */ #define UDC_MODE_LO 0x52 /* mode reg low */ #define UDC_COUNT 0x32 /* words to xfer */ /* some udc commands */ #define UDC_RESET 0 #define UDC_CHN_START 0xa0 /* start chain */ #define UDC_INT_ENABLE 0x32 /* channel 1 int on */ /* udc mode words */ #define UDC_MODE_HIWORD 0x40 #define UDC_MODE_LSEND 0xc2 #define UDC_MODE_LRECV 0xd2 /* udc reg selections */ #define UDC_RSEL_SEND 0x282 #define UDC_RSEL_RECV 0x182 /* bits in csr reg */ #define CSR_DMA_ACTIVE 0x8000 #define CSR_DMA_CONFLICT 0x4000 #define CSR_DMA_BUSERR 0x2000 #define CSR_FIFO_EMPTY 0x400 /* fifo flushed? */ #define CSR_SDB_INT 0x200 /* sbc interrupt pending */ #define CSR_DMA_INT 0x100 /* dma interrupt pending */ #define CSR_LEFT 0xc0 #define CSR_LEFT_3 0xc0 #define CSR_LEFT_2 0x80 #define CSR_LEFT_1 0x40 #define CSR_PACK_ENABLE 0x20 #define CSR_DMA_ENABLE 0x10 #define CSR_SEND 0x8 /* 1 = send 0 = recv */ #define CSR_FIFO 0x2 /* reset fifo */ #define CSR_INTR 0x4 /* interrupt enable */ #define CSR_SCSI 0x1 #define VME_DATA24 0x3d00 extern int sun3_map_test(unsigned long, char *); static int setup_can_queue = -1; module_param(setup_can_queue, int, 0); static int setup_cmd_per_lun = -1; module_param(setup_cmd_per_lun, int, 0); static int setup_sg_tablesize = -1; module_param(setup_sg_tablesize, int, 0); static int setup_hostid = -1; module_param(setup_hostid, int, 0); /* ms to wait after hitting dma regs */ #define SUN3_DMA_DELAY 10 /* dvma buffer to allocate -- 32k should hopefully be more than sufficient */ #define SUN3_DVMA_BUFSIZE 0xe000 static struct scsi_cmnd *sun3_dma_setup_done; static volatile struct sun3_dma_regs *dregs; static struct sun3_udc_regs *udc_regs; static unsigned char *sun3_dma_orig_addr; static unsigned long sun3_dma_orig_count; static int sun3_dma_active; static unsigned long last_residual; #ifndef SUN3_SCSI_VME /* dma controller register access functions */ static inline unsigned short sun3_udc_read(unsigned char reg) { unsigned short ret; dregs->udc_addr = UDC_CSR; udelay(SUN3_DMA_DELAY); ret = dregs->udc_data; udelay(SUN3_DMA_DELAY); return ret; } static inline void sun3_udc_write(unsigned short val, unsigned char reg) { dregs->udc_addr = reg; udelay(SUN3_DMA_DELAY); dregs->udc_data = val; udelay(SUN3_DMA_DELAY); } #endif // safe bits for the CSR #define CSR_GOOD 0x060f static irqreturn_t scsi_sun3_intr(int irq, void *dev) { struct Scsi_Host *instance = dev; unsigned short csr = dregs->csr; int handled = 0; #ifdef SUN3_SCSI_VME dregs->csr &= ~CSR_DMA_ENABLE; #endif if(csr & ~CSR_GOOD) { if (csr & CSR_DMA_BUSERR) shost_printk(KERN_ERR, instance, "bus error in DMA\n"); if (csr & CSR_DMA_CONFLICT) shost_printk(KERN_ERR, instance, "DMA conflict\n"); handled = 1; } if(csr & (CSR_SDB_INT | CSR_DMA_INT)) { NCR5380_intr(irq, dev); handled = 1; } return IRQ_RETVAL(handled); } /* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */ static int sun3scsi_dma_setup(struct NCR5380_hostdata *hostdata, unsigned char *data, int count, int write_flag) { void *addr; if(sun3_dma_orig_addr != NULL) dvma_unmap(sun3_dma_orig_addr); #ifdef SUN3_SCSI_VME addr = (void *)dvma_map_vme((unsigned long) data, count); #else addr = (void *)dvma_map((unsigned long) data, count); #endif sun3_dma_orig_addr = addr; sun3_dma_orig_count = count; #ifndef SUN3_SCSI_VME dregs->fifo_count = 0; sun3_udc_write(UDC_RESET, UDC_CSR); /* reset fifo */ dregs->csr &= ~CSR_FIFO; dregs->csr |= CSR_FIFO; #endif /* set direction */ if(write_flag) dregs->csr |= CSR_SEND; else dregs->csr &= ~CSR_SEND; #ifdef SUN3_SCSI_VME dregs->csr |= CSR_PACK_ENABLE; dregs->dma_addr_hi = ((unsigned long)addr >> 16); dregs->dma_addr_lo = ((unsigned long)addr & 0xffff); dregs->dma_count_hi = 0; dregs->dma_count_lo = 0; dregs->fifo_count_hi = 0; dregs->fifo_count = 0; #else /* byte count for fifo */ dregs->fifo_count = count; sun3_udc_write(UDC_RESET, UDC_CSR); /* reset fifo */ dregs->csr &= ~CSR_FIFO; dregs->csr |= CSR_FIFO; if(dregs->fifo_count != count) { shost_printk(KERN_ERR, hostdata->host, "FIFO mismatch %04x not %04x\n", dregs->fifo_count, (unsigned int) count); NCR5380_dprint(NDEBUG_DMA, hostdata->host); } /* setup udc */ udc_regs->addr_hi = (((unsigned long)(addr) & 0xff0000) >> 8); udc_regs->addr_lo = ((unsigned long)(addr) & 0xffff); udc_regs->count = count/2; /* count in words */ udc_regs->mode_hi = UDC_MODE_HIWORD; if(write_flag) { if(count & 1) udc_regs->count++; udc_regs->mode_lo = UDC_MODE_LSEND; udc_regs->rsel = UDC_RSEL_SEND; } else { udc_regs->mode_lo = UDC_MODE_LRECV; udc_regs->rsel = UDC_RSEL_RECV; } /* announce location of regs block */ sun3_udc_write(((dvma_vtob(udc_regs) & 0xff0000) >> 8), UDC_CHN_HI); sun3_udc_write((dvma_vtob(udc_regs) & 0xffff), UDC_CHN_LO); /* set dma master on */ sun3_udc_write(0xd, UDC_MODE); /* interrupt enable */ sun3_udc_write(UDC_INT_ENABLE, UDC_CSR); #endif return count; } static int sun3scsi_dma_count(struct NCR5380_hostdata *hostdata, unsigned char *data, int count) { return count; } static inline int sun3scsi_dma_recv_setup(struct NCR5380_hostdata *hostdata, unsigned char *data, int count) { return sun3scsi_dma_setup(hostdata, data, count, 0); } static inline int sun3scsi_dma_send_setup(struct NCR5380_hostdata *hostdata, unsigned char *data, int count) { return sun3scsi_dma_setup(hostdata, data, count, 1); } static int sun3scsi_dma_residual(struct NCR5380_hostdata *hostdata) { return last_residual; } static int sun3scsi_dma_xfer_len(struct NCR5380_hostdata *hostdata, struct scsi_cmnd *cmd) { int wanted_len = cmd->SCp.this_residual; if (wanted_len < DMA_MIN_SIZE || blk_rq_is_passthrough(scsi_cmd_to_rq(cmd))) return 0; return wanted_len; } static inline int sun3scsi_dma_start(unsigned long count, unsigned char *data) { #ifdef SUN3_SCSI_VME unsigned short csr; csr = dregs->csr; dregs->dma_count_hi = (sun3_dma_orig_count >> 16); dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff); dregs->fifo_count_hi = (sun3_dma_orig_count >> 16); dregs->fifo_count = (sun3_dma_orig_count & 0xffff); /* if(!(csr & CSR_DMA_ENABLE)) * dregs->csr |= CSR_DMA_ENABLE; */ #else sun3_udc_write(UDC_CHN_START, UDC_CSR); #endif return 0; } /* clean up after our dma is done */ static int sun3scsi_dma_finish(enum dma_data_direction data_dir) { const bool write_flag = data_dir == DMA_TO_DEVICE; unsigned short __maybe_unused count; unsigned short fifo; int ret = 0; sun3_dma_active = 0; #ifdef SUN3_SCSI_VME dregs->csr &= ~CSR_DMA_ENABLE; fifo = dregs->fifo_count; if (write_flag) { if ((fifo > 0) && (fifo < sun3_dma_orig_count)) fifo++; } last_residual = fifo; /* empty bytes from the fifo which didn't make it */ if ((!write_flag) && (dregs->csr & CSR_LEFT)) { unsigned char *vaddr; vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr); vaddr += (sun3_dma_orig_count - fifo); vaddr--; switch (dregs->csr & CSR_LEFT) { case CSR_LEFT_3: *vaddr = (dregs->bpack_lo & 0xff00) >> 8; vaddr--; fallthrough; case CSR_LEFT_2: *vaddr = (dregs->bpack_hi & 0x00ff); vaddr--; fallthrough; case CSR_LEFT_1: *vaddr = (dregs->bpack_hi & 0xff00) >> 8; break; } } #else // check to empty the fifo on a read if(!write_flag) { int tmo = 20000; /* .2 sec */ while(1) { if(dregs->csr & CSR_FIFO_EMPTY) break; if(--tmo <= 0) { printk("sun3scsi: fifo failed to empty!\n"); return 1; } udelay(10); } } dregs->udc_addr = 0x32; udelay(SUN3_DMA_DELAY); count = 2 * dregs->udc_data; udelay(SUN3_DMA_DELAY); fifo = dregs->fifo_count; last_residual = fifo; /* empty bytes from the fifo which didn't make it */ if((!write_flag) && (count - fifo) == 2) { unsigned short data; unsigned char *vaddr; data = dregs->fifo_data; vaddr = (unsigned char *)dvma_btov(sun3_dma_orig_addr); vaddr += (sun3_dma_orig_count - fifo); vaddr[-2] = (data & 0xff00) >> 8; vaddr[-1] = (data & 0xff); } #endif dvma_unmap(sun3_dma_orig_addr); sun3_dma_orig_addr = NULL; #ifdef SUN3_SCSI_VME dregs->dma_addr_hi = 0; dregs->dma_addr_lo = 0; dregs->dma_count_hi = 0; dregs->dma_count_lo = 0; dregs->fifo_count = 0; dregs->fifo_count_hi = 0; dregs->csr &= ~CSR_SEND; /* dregs->csr |= CSR_DMA_ENABLE; */ #else sun3_udc_write(UDC_RESET, UDC_CSR); dregs->fifo_count = 0; dregs->csr &= ~CSR_SEND; /* reset fifo */ dregs->csr &= ~CSR_FIFO; dregs->csr |= CSR_FIFO; #endif sun3_dma_setup_done = NULL; return ret; } #include "NCR5380.c" #ifdef SUN3_SCSI_VME #define SUN3_SCSI_NAME "Sun3 NCR5380 VME SCSI" #define DRV_MODULE_NAME "sun3_scsi_vme" #else #define SUN3_SCSI_NAME "Sun3 NCR5380 SCSI" #define DRV_MODULE_NAME "sun3_scsi" #endif #define PFX DRV_MODULE_NAME ": " static struct scsi_host_template sun3_scsi_template = { .module = THIS_MODULE, .proc_name = DRV_MODULE_NAME, .name = SUN3_SCSI_NAME, .info = sun3scsi_info, .queuecommand = sun3scsi_queue_command, .eh_abort_handler = sun3scsi_abort, .eh_host_reset_handler = sun3scsi_host_reset, .can_queue = 16, .this_id = 7, .sg_tablesize = 1, .cmd_per_lun = 2, .dma_boundary = PAGE_SIZE - 1, .cmd_size = NCR5380_CMD_SIZE, }; static int __init sun3_scsi_probe(struct platform_device *pdev) { struct Scsi_Host *instance; struct NCR5380_hostdata *hostdata; int error; struct resource *irq, *mem; void __iomem *ioaddr; int host_flags = 0; #ifdef SUN3_SCSI_VME int i; #endif if (setup_can_queue > 0) sun3_scsi_template.can_queue = setup_can_queue; if (setup_cmd_per_lun > 0) sun3_scsi_template.cmd_per_lun = setup_cmd_per_lun; if (setup_sg_tablesize > 0) sun3_scsi_template.sg_tablesize = setup_sg_tablesize; if (setup_hostid >= 0) sun3_scsi_template.this_id = setup_hostid & 7; #ifdef SUN3_SCSI_VME ioaddr = NULL; for (i = 0; i < 2; i++) { unsigned char x; irq = platform_get_resource(pdev, IORESOURCE_IRQ, i); mem = platform_get_resource(pdev, IORESOURCE_MEM, i); if (!irq || !mem) break; ioaddr = sun3_ioremap(mem->start, resource_size(mem), SUN3_PAGE_TYPE_VME16); dregs = (struct sun3_dma_regs *)(ioaddr + 8); if (sun3_map_test((unsigned long)dregs, &x)) { unsigned short oldcsr; oldcsr = dregs->csr; dregs->csr = 0; udelay(SUN3_DMA_DELAY); if (dregs->csr == 0x1400) break; dregs->csr = oldcsr; } iounmap(ioaddr); ioaddr = NULL; } if (!ioaddr) return -ENODEV; #else irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!irq || !mem) return -ENODEV; ioaddr = ioremap(mem->start, resource_size(mem)); dregs = (struct sun3_dma_regs *)(ioaddr + 8); udc_regs = dvma_malloc(sizeof(struct sun3_udc_regs)); if (!udc_regs) { pr_err(PFX "couldn't allocate DVMA memory!\n"); iounmap(ioaddr); return -ENOMEM; } #endif instance = scsi_host_alloc(&sun3_scsi_template, sizeof(struct NCR5380_hostdata)); if (!instance) { error = -ENOMEM; goto fail_alloc; } instance->irq = irq->start; hostdata = shost_priv(instance); hostdata->base = mem->start; hostdata->io = ioaddr; error = NCR5380_init(instance, host_flags); if (error) goto fail_init; error = request_irq(instance->irq, scsi_sun3_intr, 0, "NCR5380", instance); if (error) { pr_err(PFX "scsi%d: IRQ %d not free, bailing out\n", instance->host_no, instance->irq); goto fail_irq; } dregs->csr = 0; udelay(SUN3_DMA_DELAY); dregs->csr = CSR_SCSI | CSR_FIFO | CSR_INTR; udelay(SUN3_DMA_DELAY); dregs->fifo_count = 0; #ifdef SUN3_SCSI_VME dregs->fifo_count_hi = 0; dregs->dma_addr_hi = 0; dregs->dma_addr_lo = 0; dregs->dma_count_hi = 0; dregs->dma_count_lo = 0; dregs->ivect = VME_DATA24 | (instance->irq & 0xff); #endif NCR5380_maybe_reset_bus(instance); error = scsi_add_host(instance, NULL); if (error) goto fail_host; platform_set_drvdata(pdev, instance); scsi_scan_host(instance); return 0; fail_host: free_irq(instance->irq, instance); fail_irq: NCR5380_exit(instance); fail_init: scsi_host_put(instance); fail_alloc: if (udc_regs) dvma_free(udc_regs); iounmap(ioaddr); return error; } static int __exit sun3_scsi_remove(struct platform_device *pdev) { struct Scsi_Host *instance = platform_get_drvdata(pdev); struct NCR5380_hostdata *hostdata = shost_priv(instance); void __iomem *ioaddr = hostdata->io; scsi_remove_host(instance); free_irq(instance->irq, instance); NCR5380_exit(instance); scsi_host_put(instance); if (udc_regs) dvma_free(udc_regs); iounmap(ioaddr); return 0; } static struct platform_driver sun3_scsi_driver = { .remove = __exit_p(sun3_scsi_remove), .driver = { .name = DRV_MODULE_NAME, }, }; module_platform_driver_probe(sun3_scsi_driver, sun3_scsi_probe); MODULE_ALIAS("platform:" DRV_MODULE_NAME); MODULE_LICENSE("GPL");
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