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Release 4.14 drivers/ata/pata_icside.c

Directory: drivers/ata
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/gfp.h>
#include <scsi/scsi_host.h>
#include <linux/ata.h>
#include <linux/libata.h>

#include <asm/dma.h>
#include <asm/ecard.h>


#define DRV_NAME	"pata_icside"


#define ICS_IDENT_OFFSET		0x2280


#define ICS_ARCIN_V5_INTRSTAT		0x0000

#define ICS_ARCIN_V5_INTROFFSET		0x0004


#define ICS_ARCIN_V6_INTROFFSET_1	0x2200

#define ICS_ARCIN_V6_INTRSTAT_1		0x2290

#define ICS_ARCIN_V6_INTROFFSET_2	0x3200

#define ICS_ARCIN_V6_INTRSTAT_2		0x3290


struct portinfo {
	
unsigned int dataoffset;
	
unsigned int ctrloffset;
	
unsigned int stepping;
};


static const struct portinfo pata_icside_portinfo_v5 = {
	.dataoffset	= 0x2800,
	.ctrloffset	= 0x2b80,
	.stepping	= 6,
};


static const struct portinfo pata_icside_portinfo_v6_1 = {
	.dataoffset	= 0x2000,
	.ctrloffset	= 0x2380,
	.stepping	= 6,
};


static const struct portinfo pata_icside_portinfo_v6_2 = {
	.dataoffset	= 0x3000,
	.ctrloffset	= 0x3380,
	.stepping	= 6,
};


struct pata_icside_state {
	
void __iomem *irq_port;
	
void __iomem *ioc_base;
	
unsigned int type;
	
unsigned int dma;
	struct {
		
u8 port_sel;
		
u8 disabled;
		
unsigned int speed[ATA_MAX_DEVICES];
	
} port[2];
};


struct pata_icside_info {
	
struct pata_icside_state *state;
	
struct expansion_card	*ec;
	
void __iomem		*base;
	
void __iomem		*irqaddr;
	
unsigned int		irqmask;
	
const expansioncard_ops_t *irqops;
	
unsigned int		mwdma_mask;
	
unsigned int		nr_ports;
	
const struct portinfo	*port[2];
	
unsigned long		raw_base;
	
unsigned long		raw_ioc_base;
};


#define ICS_TYPE_A3IN	0

#define ICS_TYPE_A3USER	1

#define ICS_TYPE_V6	3

#define ICS_TYPE_V5	15

#define ICS_TYPE_NOTYPE	((unsigned int)-1)

/* ---------------- Version 5 PCB Support Functions --------------------- */
/* Prototype: pata_icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
 * Purpose  : enable interrupts from card
 */

static void pata_icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr) { struct pata_icside_state *state = ec->irq_data; writeb(0, state->irq_port + ICS_ARCIN_V5_INTROFFSET); }

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/* Prototype: pata_icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr) * Purpose : disable interrupts from card */
static void pata_icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr) { struct pata_icside_state *state = ec->irq_data; readb(state->irq_port + ICS_ARCIN_V5_INTROFFSET); }

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static const expansioncard_ops_t pata_icside_ops_arcin_v5 = { .irqenable = pata_icside_irqenable_arcin_v5, .irqdisable = pata_icside_irqdisable_arcin_v5, }; /* ---------------- Version 6 PCB Support Functions --------------------- */ /* Prototype: pata_icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr) * Purpose : enable interrupts from card */
static void pata_icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr) { struct pata_icside_state *state = ec->irq_data; void __iomem *base = state->irq_port; if (!state->port[0].disabled) writeb(0, base + ICS_ARCIN_V6_INTROFFSET_1); if (!state->port[1].disabled) writeb(0, base + ICS_ARCIN_V6_INTROFFSET_2); }

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/* Prototype: pata_icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr) * Purpose : disable interrupts from card */
static void pata_icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr) { struct pata_icside_state *state = ec->irq_data; readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1); readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2); }

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/* Prototype: pata_icside_irqprobe(struct expansion_card *ec) * Purpose : detect an active interrupt from card */
static int pata_icside_irqpending_arcin_v6(struct expansion_card *ec) { struct pata_icside_state *state = ec->irq_data; return readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_1) & 1 || readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_2) & 1; }

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static const expansioncard_ops_t pata_icside_ops_arcin_v6 = { .irqenable = pata_icside_irqenable_arcin_v6, .irqdisable = pata_icside_irqdisable_arcin_v6, .irqpending = pata_icside_irqpending_arcin_v6, }; /* * SG-DMA support. * * Similar to the BM-DMA, but we use the RiscPCs IOMD DMA controllers. * There is only one DMA controller per card, which means that only * one drive can be accessed at one time. NOTE! We do not enforce that * here, but we rely on the main IDE driver spotting that both * interfaces use the same IRQ, which should guarantee this. */ /* * Configure the IOMD to give the appropriate timings for the transfer * mode being requested. We take the advice of the ATA standards, and * calculate the cycle time based on the transfer mode, and the EIDE * MW DMA specs that the drive provides in the IDENTIFY command. * * We have the following IOMD DMA modes to choose from: * * Type Active Recovery Cycle * A 250 (250) 312 (550) 562 (800) * B 187 (200) 250 (550) 437 (750) * C 125 (125) 125 (375) 250 (500) * D 62 (50) 125 (375) 187 (425) * * (figures in brackets are actual measured timings on DIOR/DIOW) * * However, we also need to take care of the read/write active and * recovery timings: * * Read Write * Mode Active -- Recovery -- Cycle IOMD type * MW0 215 50 215 480 A * MW1 80 50 50 150 C * MW2 70 25 25 120 C */
static void pata_icside_set_dmamode(struct ata_port *ap, struct ata_device *adev) { struct pata_icside_state *state = ap->host->private_data; struct ata_timing t; unsigned int cycle; char iomd_type; /* * DMA is based on a 16MHz clock */ if (ata_timing_compute(adev, adev->dma_mode, &t, 1000, 1)) return; /* * Choose the IOMD cycle timing which ensure that the interface * satisfies the measured active, recovery and cycle times. */ if (t.active <= 50 && t.recover <= 375 && t.cycle <= 425) iomd_type = 'D', cycle = 187; else if (t.active <= 125 && t.recover <= 375 && t.cycle <= 500) iomd_type = 'C', cycle = 250; else if (t.active <= 200 && t.recover <= 550 && t.cycle <= 750) iomd_type = 'B', cycle = 437; else iomd_type = 'A', cycle = 562; ata_dev_info(adev, "timings: act %dns rec %dns cyc %dns (%c)\n", t.active, t.recover, t.cycle, iomd_type); state->port[ap->port_no].speed[adev->devno] = cycle; }

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static void pata_icside_bmdma_setup(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct pata_icside_state *state = ap->host->private_data; unsigned int write = qc->tf.flags & ATA_TFLAG_WRITE; /* * We are simplex; BUG if we try to fiddle with DMA * while it's active. */ BUG_ON(dma_channel_active(state->dma)); /* * Route the DMA signals to the correct interface */ writeb(state->port[ap->port_no].port_sel, state->ioc_base); set_dma_speed(state->dma, state->port[ap->port_no].speed[qc->dev->devno]); set_dma_sg(state->dma, qc->sg, qc->n_elem); set_dma_mode(state->dma, write ? DMA_MODE_WRITE : DMA_MODE_READ); /* issue r/w command */ ap->ops->sff_exec_command(ap, &qc->tf); }

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static void pata_icside_bmdma_start(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct pata_icside_state *state = ap->host->private_data; BUG_ON(dma_channel_active(state->dma)); enable_dma(state->dma); }

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static void pata_icside_bmdma_stop(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct pata_icside_state *state = ap->host->private_data; disable_dma(state->dma); /* see ata_bmdma_stop */ ata_sff_dma_pause(ap); }

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static u8 pata_icside_bmdma_status(struct ata_port *ap) { struct pata_icside_state *state = ap->host->private_data; void __iomem *irq_port; irq_port = state->irq_port + (ap->port_no ? ICS_ARCIN_V6_INTRSTAT_2 : ICS_ARCIN_V6_INTRSTAT_1); return readb(irq_port) & 1 ? ATA_DMA_INTR : 0; }

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static int icside_dma_init(struct pata_icside_info *info) { struct pata_icside_state *state = info->state; struct expansion_card *ec = info->ec; int i; for (i = 0; i < ATA_MAX_DEVICES; i++) { state->port[0].speed[i] = 480; state->port[1].speed[i] = 480; } if (ec->dma != NO_DMA && !request_dma(ec->dma, DRV_NAME)) { state->dma = ec->dma; info->mwdma_mask = ATA_MWDMA2; } return 0; }

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static struct scsi_host_template pata_icside_sht = { ATA_BASE_SHT(DRV_NAME), .sg_tablesize = SG_MAX_SEGMENTS, .dma_boundary = IOMD_DMA_BOUNDARY, };
static void pata_icside_postreset(struct ata_link *link, unsigned int *classes) { struct ata_port *ap = link->ap; struct pata_icside_state *state = ap->host->private_data; if (classes[0] != ATA_DEV_NONE || classes[1] != ATA_DEV_NONE) return ata_sff_postreset(link, classes); state->port[ap->port_no].disabled = 1; if (state->type == ICS_TYPE_V6) { /* * Disable interrupts from this port, otherwise we * receive spurious interrupts from the floating * interrupt line. */ void __iomem *irq_port = state->irq_port + (ap->port_no ? ICS_ARCIN_V6_INTROFFSET_2 : ICS_ARCIN_V6_INTROFFSET_1); readb(irq_port); } }

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static struct ata_port_operations pata_icside_port_ops = { .inherits = &ata_bmdma_port_ops, /* no need to build any PRD tables for DMA */ .qc_prep = ata_noop_qc_prep, .sff_data_xfer = ata_sff_data_xfer_noirq, .bmdma_setup = pata_icside_bmdma_setup, .bmdma_start = pata_icside_bmdma_start, .bmdma_stop = pata_icside_bmdma_stop, .bmdma_status = pata_icside_bmdma_status, .cable_detect = ata_cable_40wire, .set_dmamode = pata_icside_set_dmamode, .postreset = pata_icside_postreset, .port_start = ATA_OP_NULL, /* don't need PRD table */ };
static void pata_icside_setup_ioaddr(struct ata_port *ap, void __iomem *base, struct pata_icside_info *info, const struct portinfo *port) { struct ata_ioports *ioaddr = &ap->ioaddr; void __iomem *cmd = base + port->dataoffset; ioaddr->cmd_addr = cmd; ioaddr->data_addr = cmd + (ATA_REG_DATA << port->stepping); ioaddr->error_addr = cmd + (ATA_REG_ERR << port->stepping); ioaddr->feature_addr = cmd + (ATA_REG_FEATURE << port->stepping); ioaddr->nsect_addr = cmd + (ATA_REG_NSECT << port->stepping); ioaddr->lbal_addr = cmd + (ATA_REG_LBAL << port->stepping); ioaddr->lbam_addr = cmd + (ATA_REG_LBAM << port->stepping); ioaddr->lbah_addr = cmd + (ATA_REG_LBAH << port->stepping); ioaddr->device_addr = cmd + (ATA_REG_DEVICE << port->stepping); ioaddr->status_addr = cmd + (ATA_REG_STATUS << port->stepping); ioaddr->command_addr = cmd + (ATA_REG_CMD << port->stepping); ioaddr->ctl_addr = base + port->ctrloffset; ioaddr->altstatus_addr = ioaddr->ctl_addr; ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", info->raw_base + port->dataoffset, info->raw_base + port->ctrloffset); if (info->raw_ioc_base) ata_port_desc(ap, "iocbase 0x%lx", info->raw_ioc_base); }

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static int pata_icside_register_v5(struct pata_icside_info *info) { struct pata_icside_state *state = info->state; void __iomem *base; base = ecardm_iomap(info->ec, ECARD_RES_MEMC, 0, 0); if (!base) return -ENOMEM; state->irq_port = base; info->base = base; info->irqaddr = base + ICS_ARCIN_V5_INTRSTAT; info->irqmask = 1; info->irqops = &pata_icside_ops_arcin_v5; info->nr_ports = 1; info->port[0] = &pata_icside_portinfo_v5; info->raw_base = ecard_resource_start(info->ec, ECARD_RES_MEMC); return 0; }

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static int pata_icside_register_v6(struct pata_icside_info *info) { struct pata_icside_state *state = info->state; struct expansion_card *ec = info->ec; void __iomem *ioc_base, *easi_base; unsigned int sel = 0; ioc_base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); if (!ioc_base) return -ENOMEM; easi_base = ioc_base; if (ecard_resource_flags(ec, ECARD_RES_EASI)) { easi_base = ecardm_iomap(ec, ECARD_RES_EASI, 0, 0); if (!easi_base) return -ENOMEM; /* * Enable access to the EASI region. */ sel = 1 << 5; } writeb(sel, ioc_base); state->irq_port = easi_base; state->ioc_base = ioc_base; state->port[0].port_sel = sel; state->port[1].port_sel = sel | 1; info->base = easi_base; info->irqops = &pata_icside_ops_arcin_v6; info->nr_ports = 2; info->port[0] = &pata_icside_portinfo_v6_1; info->port[1] = &pata_icside_portinfo_v6_2; info->raw_base = ecard_resource_start(ec, ECARD_RES_EASI); info->raw_ioc_base = ecard_resource_start(ec, ECARD_RES_IOCFAST); return icside_dma_init(info); }

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static int pata_icside_add_ports(struct pata_icside_info *info) { struct expansion_card *ec = info->ec; struct ata_host *host; int i; if (info->irqaddr) { ec->irqaddr = info->irqaddr; ec->irqmask = info->irqmask; } if (info->irqops) ecard_setirq(ec, info->irqops, info->state); /* * Be on the safe side - disable interrupts */ ec->ops->irqdisable(ec, ec->irq); host = ata_host_alloc(&ec->dev, info->nr_ports); if (!host) return -ENOMEM; host->private_data = info->state; host->flags = ATA_HOST_SIMPLEX; for (i = 0; i < info->nr_ports; i++) { struct ata_port *ap = host->ports[i]; ap->pio_mask = ATA_PIO4; ap->mwdma_mask = info->mwdma_mask; ap->flags |= ATA_FLAG_SLAVE_POSS; ap->ops = &pata_icside_port_ops; pata_icside_setup_ioaddr(ap, info->base, info, info->port[i]); } return ata_host_activate(host, ec->irq, ata_bmdma_interrupt, 0, &pata_icside_sht); }

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Total213100.00%5100.00%


static int pata_icside_probe(struct expansion_card *ec, const struct ecard_id *id) { struct pata_icside_state *state; struct pata_icside_info info; void __iomem *idmem; int ret; ret = ecard_request_resources(ec); if (ret) goto out; state = devm_kzalloc(&ec->dev, sizeof(*state), GFP_KERNEL); if (!state) { ret = -ENOMEM; goto release; } state->type = ICS_TYPE_NOTYPE; state->dma = NO_DMA; idmem = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); if (idmem) { unsigned int type; type = readb(idmem + ICS_IDENT_OFFSET) & 1; type |= (readb(idmem + ICS_IDENT_OFFSET + 4) & 1) << 1; type |= (readb(idmem + ICS_IDENT_OFFSET + 8) & 1) << 2; type |= (readb(idmem + ICS_IDENT_OFFSET + 12) & 1) << 3; ecardm_iounmap(ec, idmem); state->type = type; } memset(&info, 0, sizeof(info)); info.state = state; info.ec = ec; switch (state->type) { case ICS_TYPE_A3IN: dev_warn(&ec->dev, "A3IN unsupported\n"); ret = -ENODEV; break; case ICS_TYPE_A3USER: dev_warn(&ec->dev, "A3USER unsupported\n"); ret = -ENODEV; break; case ICS_TYPE_V5: ret = pata_icside_register_v5(&info); break; case ICS_TYPE_V6: ret = pata_icside_register_v6(&info); break; default: dev_warn(&ec->dev, "unknown interface type\n"); ret = -ENODEV; break; } if (ret == 0) ret = pata_icside_add_ports(&info); if (ret == 0) goto out; release: ecard_release_resources(ec); out: return ret; }

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static void pata_icside_shutdown(struct expansion_card *ec) { struct ata_host *host = ecard_get_drvdata(ec); unsigned long flags; /* * Disable interrupts from this card. We need to do * this before disabling EASI since we may be accessing * this register via that region. */ local_irq_save(flags); ec->ops->irqdisable(ec, ec->irq); local_irq_restore(flags); /* * Reset the ROM pointer so that we can read the ROM * after a soft reboot. This also disables access to * the IDE taskfile via the EASI region. */ if (host) { struct pata_icside_state *state = host->private_data; if (state->ioc_base) writeb(0, state->ioc_base); } }

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static void pata_icside_remove(struct expansion_card *ec) { struct ata_host *host = ecard_get_drvdata(ec); struct pata_icside_state *state = host->private_data; ata_host_detach(host); pata_icside_shutdown(ec); /* * don't NULL out the drvdata - devres/libata wants it * to free the ata_host structure. */ if (state->dma != NO_DMA) free_dma(state->dma); ecard_release_resources(ec); }

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static const struct ecard_id pata_icside_ids[] = { { MANU_ICS, PROD_ICS_IDE }, { MANU_ICS2, PROD_ICS2_IDE }, { 0xffff, 0xffff } }; static struct ecard_driver pata_icside_driver = { .probe = pata_icside_probe, .remove = pata_icside_remove, .shutdown = pata_icside_shutdown, .id_table = pata_icside_ids, .drv = { .name = DRV_NAME, }, };
static int __init pata_icside_init(void) { return ecard_register_driver(&pata_icside_driver); }

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static void __exit pata_icside_exit(void) { ecard_remove_driver(&pata_icside_driver); }

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MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("ICS PATA driver"); module_init(pata_icside_init); module_exit(pata_icside_exit);

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Ming Lin10.04%14.76%
Joe Perches10.04%14.76%
Alan Cox10.04%14.76%
Greg Kroah-Hartman0.00%00.00%
Total2729100.00%21100.00%
Directory: drivers/ata
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