iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

scsi: fdomain: Add register definitions

Browse Source 
Add register bit definitions from documentation to header file and use them
instead of magic constants. No changes to generated binary.

Signed-off-by: Ondrej Zary <linux@zary.sk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ondrej Zary 2019-05-18 21:47:24 +02:00 committed by Martin K. Petersen
parent aa343c695a
commit 1697c6a64c
3 changed files with 167 additions and 98 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

144
drivers/scsi/fdomain.c
View File

@ -99,7 +99,7 @@
* up the machine.
*/
#define FIFO_COUNT 2 /* Number of 512 byte blocks before INTR */
#define PARITY_MASK 0x08 /* Parity enabled, 0x00 = disabled */
#define PARITY_MASK ACTL_PAREN /* Parity enabled, 0 = disabled */
enum chip_type {
unknown = 0x00,
@ -117,18 +117,19 @@ struct fdomain {
static inline void fdomain_make_bus_idle(struct fdomain *fd)
{
outb(0, fd->base + SCSI_Cntl);
outb(0, fd->base + SCSI_Mode_Cntl);
outb(0, fd->base + REG_BCTL);
outb(0, fd->base + REG_MCTL);
if (fd->chip == tmc18c50 || fd->chip == tmc18c30)
/* Clear forced intr. */
outb(0x21 | PARITY_MASK, fd->base + TMC_Cntl);
outb(ACTL_RESET | ACTL_CLRFIRQ | PARITY_MASK,
fd->base + REG_ACTL);
else
outb(0x01 | PARITY_MASK, fd->base + TMC_Cntl);
outb(ACTL_RESET | PARITY_MASK, fd->base + REG_ACTL);
}
static enum chip_type fdomain_identify(int port)
{
u16 id = inb(port + LSB_ID_Code) | inb(port + MSB_ID_Code) << 8;
u16 id = inb(port + REG_ID_LSB) | inb(port + REG_ID_MSB) << 8;
switch (id) {
case 0x6127:
@ -140,10 +141,10 @@ static enum chip_type fdomain_identify(int port)
}
/* Try to toggle 32-bit mode. This only works on an 18c30 chip. */
outb(0x80, port + IO_Control);
if ((inb(port + Configuration2) & 0x80) == 0x80) {
outb(0x00, port + IO_Control);
if ((inb(port + Configuration2) & 0x80) == 0x00)
outb(CFG2_32BIT, port + REG_CFG2);
if ((inb(port + REG_CFG2) & CFG2_32BIT)) {
outb(0, port + REG_CFG2);
if ((inb(port + REG_CFG2) & CFG2_32BIT) == 0)
return tmc18c30;
}
/* If that failed, we are an 18c50. */
@ -155,8 +156,8 @@ static int fdomain_test_loopback(int base)
int i;
for (i = 0; i < 255; i++) {
outb(i, base + Write_Loopback);
if (inb(base + Read_Loopback) != i)
outb(i, base + REG_LOOPBACK);
if (inb(base + REG_LOOPBACK) != i)
return 1;
}
@ -165,12 +166,12 @@ static int fdomain_test_loopback(int base)
static void fdomain_reset(int base)
{
outb(1, base + SCSI_Cntl);
outb(1, base + REG_BCTL);
mdelay(20);
outb(0, base + SCSI_Cntl);
outb(0, base + REG_BCTL);
mdelay(1150);
outb(0, base + SCSI_Mode_Cntl);
outb(PARITY_MASK, base + TMC_Cntl);
outb(0, base + REG_MCTL);
outb(PARITY_MASK, base + REG_ACTL);
}
static int fdomain_select(struct Scsi_Host *sh, int target)
@ -179,20 +180,20 @@ static int fdomain_select(struct Scsi_Host *sh, int target)
unsigned long timeout;
struct fdomain *fd = shost_priv(sh);
outb(0x82, fd->base + SCSI_Cntl); /* Bus Enable + Select */
outb(BIT(sh->this_id) | BIT(target), fd->base + SCSI_Data_NoACK);
outb(BCTL_BUSEN | BCTL_SEL, fd->base + REG_BCTL);
outb(BIT(sh->this_id) | BIT(target), fd->base + REG_SCSI_DATA_NOACK);
/* Stop arbitration and enable parity */
outb(PARITY_MASK, fd->base + TMC_Cntl);
outb(PARITY_MASK, fd->base + REG_ACTL);
timeout = 350; /* 350 msec */
do {
status = inb(fd->base + SCSI_Status); /* Read adapter status */
if (status & 1) { /* Busy asserted */
status = inb(fd->base + REG_BSTAT);
if (status & BSTAT_BSY) {
/* Enable SCSI Bus */
/* (on error, should make bus idle with 0) */
outb(0x80, fd->base + SCSI_Cntl);
outb(BCTL_BUSEN, fd->base + REG_BCTL);
return 0;
}
mdelay(1);
@ -203,7 +204,7 @@ static int fdomain_select(struct Scsi_Host *sh, int target)
static void fdomain_finish_cmd(struct fdomain *fd, int result)
{
outb(0x00, fd->base + Interrupt_Cntl);
outb(0, fd->base + REG_ICTL);
fdomain_make_bus_idle(fd);
fd->cur_cmd->result = result;
fd->cur_cmd->scsi_done(fd->cur_cmd);
@ -216,15 +217,15 @@ static void fdomain_read_data(struct scsi_cmnd *cmd)
unsigned char *virt, *ptr;
size_t offset, len;
while ((len = inw(fd->base + FIFO_Data_Count)) > 0) {
while ((len = inw(fd->base + REG_FIFO_COUNT)) > 0) {
offset = scsi_bufflen(cmd) - scsi_get_resid(cmd);
virt = scsi_kmap_atomic_sg(scsi_sglist(cmd), scsi_sg_count(cmd),
&offset, &len);
ptr = virt + offset;
if (len & 1)
*ptr++ = inb(fd->base + Read_FIFO);
*ptr++ = inb(fd->base + REG_FIFO);
if (len > 1)
insw(fd->base + Read_FIFO, ptr, len >> 1);
insw(fd->base + REG_FIFO, ptr, len >> 1);
scsi_set_resid(cmd, scsi_get_resid(cmd) - len);
scsi_kunmap_atomic_sg(virt);
}
@ -238,7 +239,7 @@ static void fdomain_write_data(struct scsi_cmnd *cmd)
unsigned char *virt, *ptr;
size_t offset, len;
while ((len = FIFO_Size - inw(fd->base + FIFO_Data_Count)) > 512) {
while ((len = FIFO_Size - inw(fd->base + REG_FIFO_COUNT)) > 512) {
offset = scsi_bufflen(cmd) - scsi_get_resid(cmd);
if (len + offset > scsi_bufflen(cmd)) {
len = scsi_bufflen(cmd) - offset;
@ -249,9 +250,9 @@ static void fdomain_write_data(struct scsi_cmnd *cmd)
&offset, &len);
ptr = virt + offset;
if (len & 1)
outb(*ptr++, fd->base + Write_FIFO);
outb(*ptr++, fd->base + REG_FIFO);
if (len > 1)
outsw(fd->base + Write_FIFO, ptr, len >> 1);
outsw(fd->base + REG_FIFO, ptr, len >> 1);
scsi_set_resid(cmd, scsi_get_resid(cmd) - len);
scsi_kunmap_atomic_sg(virt);
}
@ -270,66 +271,68 @@ static void fdomain_work(struct work_struct *work)
spin_lock_irqsave(sh->host_lock, flags);
if (cmd->SCp.phase & in_arbitration) {
status = inb(fd->base + TMC_Status);
if (!(status & 0x02)) {
status = inb(fd->base + REG_ASTAT);
if (!(status & ASTAT_ARB)) {
fdomain_finish_cmd(fd, DID_BUS_BUSY << 16);
goto out;
}
cmd->SCp.phase = in_selection;
outb(0x40 | FIFO_COUNT, fd->base + Interrupt_Cntl);
outb(0x82, fd->base + SCSI_Cntl); /* Bus Enable + Select */
outb(BIT(cmd->device->host->this_id) |
BIT(scmd_id(cmd)), fd->base + SCSI_Data_NoACK);
outb(ICTL_SEL | FIFO_COUNT, fd->base + REG_ICTL);
outb(BCTL_BUSEN | BCTL_SEL, fd->base + REG_BCTL);
outb(BIT(cmd->device->host->this_id) | BIT(scmd_id(cmd)),
fd->base + REG_SCSI_DATA_NOACK);
/* Stop arbitration and enable parity */
outb(0x10 | PARITY_MASK, fd->base + TMC_Cntl);
outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
goto out;
} else if (cmd->SCp.phase & in_selection) {
status = inb(fd->base + SCSI_Status);
if (!(status & 0x01)) {
status = inb(fd->base + REG_BSTAT);
if (!(status & BSTAT_BSY)) {
/* Try again, for slow devices */
if (fdomain_select(cmd->device->host, scmd_id(cmd))) {
fdomain_finish_cmd(fd, DID_NO_CONNECT << 16);
goto out;
}
/* Stop arbitration and enable parity */
outb(0x10 | PARITY_MASK, fd->base + TMC_Cntl);
outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
}
cmd->SCp.phase = in_other;
outb(0x90 | FIFO_COUNT, fd->base + Interrupt_Cntl);
outb(0x80, fd->base + SCSI_Cntl);
outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT, fd->base + REG_ICTL);
outb(BCTL_BUSEN, fd->base + REG_BCTL);
goto out;
}
/* cur_cmd->SCp.phase == in_other: this is the body of the routine */
status = inb(fd->base + SCSI_Status);
status = inb(fd->base + REG_BSTAT);
if (status & 0x10) { /* REQ */
if (status & BSTAT_REQ) {
switch (status & 0x0e) {
case 0x08: /* COMMAND OUT */
case BSTAT_CMD: /* COMMAND OUT */
outb(cmd->cmnd[cmd->SCp.sent_command++],
fd->base + Write_SCSI_Data);
fd->base + REG_SCSI_DATA);
break;
case 0x00: /* DATA OUT -- tmc18c50/tmc18c30 only */
case 0: /* DATA OUT -- tmc18c50/tmc18c30 only */
if (fd->chip != tmc1800 && !cmd->SCp.have_data_in) {
cmd->SCp.have_data_in = -1;
outb(0xd0 | PARITY_MASK, fd->base + TMC_Cntl);
outb(ACTL_IRQEN | ACTL_FIFOWR | ACTL_FIFOEN |
PARITY_MASK, fd->base + REG_ACTL);
}
break;
case 0x04: /* DATA IN -- tmc18c50/tmc18c30 only */
case BSTAT_IO: /* DATA IN -- tmc18c50/tmc18c30 only */
if (fd->chip != tmc1800 && !cmd->SCp.have_data_in) {
cmd->SCp.have_data_in = 1;
outb(0x90 | PARITY_MASK, fd->base + TMC_Cntl);
outb(ACTL_IRQEN | ACTL_FIFOEN | PARITY_MASK,
fd->base + REG_ACTL);
}
break;
case 0x0c: /* STATUS IN */
cmd->SCp.Status = inb(fd->base + Read_SCSI_Data);
case BSTAT_CMD | BSTAT_IO: /* STATUS IN */
cmd->SCp.Status = inb(fd->base + REG_SCSI_DATA);
break;
case 0x0a: /* MESSAGE OUT */
outb(MESSAGE_REJECT, fd->base + Write_SCSI_Data);
case BSTAT_MSG | BSTAT_CMD: /* MESSAGE OUT */
outb(MESSAGE_REJECT, fd->base + REG_SCSI_DATA);
break;
case 0x0e: /* MESSAGE IN */
cmd->SCp.Message = inb(fd->base + Read_SCSI_Data);
case BSTAT_MSG | BSTAT_IO | BSTAT_CMD: /* MESSAGE IN */
cmd->SCp.Message = inb(fd->base + REG_SCSI_DATA);
if (!cmd->SCp.Message)
++done;
break;
@ -340,10 +343,12 @@ static void fdomain_work(struct work_struct *work)
cmd->SCp.sent_command >= cmd->cmd_len) {
if (cmd->sc_data_direction == DMA_TO_DEVICE) {
cmd->SCp.have_data_in = -1;
outb(0xd0 | PARITY_MASK, fd->base + TMC_Cntl);
outb(ACTL_IRQEN | ACTL_FIFOWR | ACTL_FIFOEN |
PARITY_MASK, fd->base + REG_ACTL);
} else {
cmd->SCp.have_data_in = 1;
outb(0x90 | PARITY_MASK, fd->base + TMC_Cntl);
outb(ACTL_IRQEN | ACTL_FIFOEN | PARITY_MASK,
fd->base + REG_ACTL);
}
}
@ -359,10 +364,12 @@ static void fdomain_work(struct work_struct *work)
(DID_OK << 16));
} else {
if (cmd->SCp.phase & disconnect) {
outb(0xd0 | FIFO_COUNT, fd->base + Interrupt_Cntl);
outb(0x00, fd->base + SCSI_Cntl);
outb(ICTL_FIFO | ICTL_SEL | ICTL_REQ | FIFO_COUNT,
fd->base + REG_ICTL);
outb(0, fd->base + REG_BCTL);
} else
outb(0x90 | FIFO_COUNT, fd->base + Interrupt_Cntl);
outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT,
fd->base + REG_ICTL);
}
out:
spin_unlock_irqrestore(sh->host_lock, flags);
@ -373,10 +380,10 @@ static irqreturn_t fdomain_irq(int irq, void *dev_id)
struct fdomain *fd = dev_id;
/* Is it our IRQ? */
if ((inb(fd->base + TMC_Status) & 0x01) == 0)
if ((inb(fd->base + REG_ASTAT) & ASTAT_IRQ) == 0)
return IRQ_NONE;
outb(0x00, fd->base + Interrupt_Cntl);
outb(0, fd->base + REG_ICTL);
/* We usually have one spurious interrupt after each command. */
if (!fd->cur_cmd) /* Spurious interrupt */
@ -406,12 +413,13 @@ static int fdomain_queue(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
fdomain_make_bus_idle(fd);
/* Start arbitration */
outb(0x00, fd->base + Interrupt_Cntl);
outb(0x00, fd->base + SCSI_Cntl); /* Disable data drivers */
outb(BIT(cmd->device->host->this_id),
fd->base + SCSI_Data_NoACK); /* Set our id bit */
outb(0x20, fd->base + Interrupt_Cntl);
outb(0x14 | PARITY_MASK, fd->base + TMC_Cntl); /* Start arbitration */
outb(0, fd->base + REG_ICTL);
outb(0, fd->base + REG_BCTL); /* Disable data drivers */
/* Set our id bit */
outb(BIT(cmd->device->host->this_id), fd->base + REG_SCSI_DATA_NOACK);
outb(ICTL_ARB, fd->base + REG_ICTL);
/* Start arbitration */
outb(ACTL_ARB | ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
spin_unlock_irqrestore(sh->host_lock, flags);

117
drivers/scsi/fdomain.h
View File

@ -12,34 +12,95 @@ enum {
sent_ident = 0x40,
};
enum in_port_type {
Read_SCSI_Data = 0,
SCSI_Status = 1,
TMC_Status = 2,
FIFO_Status = 3, /* tmc18c50/tmc18c30 only */
Interrupt_Cond = 4, /* tmc18c50/tmc18c30 only */
LSB_ID_Code = 5,
MSB_ID_Code = 6,
Read_Loopback = 7,
SCSI_Data_NoACK = 8,
Interrupt_Status = 9,
Configuration1 = 10,
Configuration2 = 11, /* tmc18c50/tmc18c30 only */
Read_FIFO = 12,
FIFO_Data_Count = 14
};
enum out_port_type {
Write_SCSI_Data = 0,
SCSI_Cntl = 1,
Interrupt_Cntl = 2,
SCSI_Mode_Cntl = 3,
TMC_Cntl = 4,
Memory_Cntl = 5, /* tmc18c50/tmc18c30 only */
Write_Loopback = 7,
IO_Control = 11, /* tmc18c30 only */
Write_FIFO = 12
};
/* (@) = not present on TMC1800, (#) = not present on TMC1800 and TMC18C50 */
#define REG_SCSI_DATA 0 /* R/W: SCSI Data (with ACK) */
#define REG_BSTAT 1 /* R: SCSI Bus Status */
#define BSTAT_BSY BIT(0) /* Busy */
#define BSTAT_MSG BIT(1) /* Message */
#define BSTAT_IO BIT(2) /* Input/Output */
#define BSTAT_CMD BIT(3) /* Command/Data */
#define BSTAT_REQ BIT(4) /* Request and Not Ack */
#define BSTAT_SEL BIT(5) /* Select */
#define BSTAT_ACK BIT(6) /* Acknowledge and Request */
#define BSTAT_ATN BIT(7) /* Attention */
#define REG_BCTL 1 /* W: SCSI Bus Control */
#define BCTL_RST BIT(0) /* Bus Reset */
#define BCTL_SEL BIT(1) /* Select */
#define BCTL_BSY BIT(2) /* Busy */
#define BCTL_ATN BIT(3) /* Attention */
#define BCTL_IO BIT(4) /* Input/Output */
#define BCTL_CMD BIT(5) /* Command/Data */
#define BCTL_MSG BIT(6) /* Message */
#define BCTL_BUSEN BIT(7) /* Enable bus drivers */
#define REG_ASTAT 2 /* R: Adapter Status 1 */
#define ASTAT_IRQ BIT(0) /* Interrupt active */
#define ASTAT_ARB BIT(1) /* Arbitration complete */
#define ASTAT_PARERR BIT(2) /* Parity error */
#define ASTAT_RST BIT(3) /* SCSI reset occurred */
#define ASTAT_FIFODIR BIT(4) /* FIFO direction */
#define ASTAT_FIFOEN BIT(5) /* FIFO enabled */
#define ASTAT_PAREN BIT(6) /* Parity enabled */
#define ASTAT_BUSEN BIT(7) /* Bus drivers enabled */
#define REG_ICTL 2 /* W: Interrupt Control */
#define ICTL_FIFO_MASK 0x0f /* FIFO threshold, 1/16 FIFO size */
#define ICTL_FIFO BIT(4) /* Int. on FIFO count */
#define ICTL_ARB BIT(5) /* Int. on Arbitration complete */
#define ICTL_SEL BIT(6) /* Int. on SCSI Select */
#define ICTL_REQ BIT(7) /* Int. on SCSI Request */
#define REG_FSTAT 3 /* R: Adapter Status 2 (FIFO) - (@) */
#define FSTAT_ONOTEMPTY BIT(0) /* Output FIFO not empty */
#define FSTAT_INOTEMPTY BIT(1) /* Input FIFO not empty */
#define FSTAT_NOTEMPTY BIT(2) /* Main FIFO not empty */
#define FSTAT_NOTFULL BIT(3) /* Main FIFO not full */
#define REG_MCTL 3 /* W: SCSI Data Mode Control */
#define MCTL_ACK_MASK 0x0f /* Acknowledge period */
#define MCTL_ACTDEASS BIT(4) /* Active deassert of REQ and ACK */
#define MCTL_TARGET BIT(5) /* Enable target mode */
#define MCTL_FASTSYNC BIT(6) /* Enable Fast Synchronous */
#define MCTL_SYNC BIT(7) /* Enable Synchronous */
#define REG_INTCOND 4 /* R: Interrupt Condition - (@) */
#define IRQ_FIFO BIT(1) /* FIFO interrupt */
#define IRQ_REQ BIT(2) /* SCSI Request interrupt */
#define IRQ_SEL BIT(3) /* SCSI Select interrupt */
#define IRQ_ARB BIT(4) /* SCSI Arbitration interrupt */
#define IRQ_RST BIT(5) /* SCSI Reset interrupt */
#define IRQ_FORCED BIT(6) /* Forced interrupt */
#define IRQ_TIMEOUT BIT(7) /* Bus timeout */
#define REG_ACTL 4 /* W: Adapter Control 1 */
#define ACTL_RESET BIT(0) /* Reset FIFO, parity, reset int. */
#define ACTL_FIRQ BIT(1) /* Set Forced interrupt */
#define ACTL_ARB BIT(2) /* Initiate Bus Arbitration */
#define ACTL_PAREN BIT(3) /* Enable SCSI Parity */
#define ACTL_IRQEN BIT(4) /* Enable interrupts */
#define ACTL_CLRFIRQ BIT(5) /* Clear Forced interrupt */
#define ACTL_FIFOWR BIT(6) /* FIFO Direction (1=write) */
#define ACTL_FIFOEN BIT(7) /* Enable FIFO */
#define REG_ID_LSB 5 /* R: ID Code (LSB) */
#define REG_ACTL2 5 /* Adapter Control 2 - (@) */
#define ACTL2_RAMOVRLY BIT(0) /* Enable RAM overlay */
#define ACTL2_SLEEP BIT(7) /* Sleep mode */
#define REG_ID_MSB 6 /* R: ID Code (MSB) */
#define REG_LOOPBACK 7 /* R/W: Loopback */
#define REG_SCSI_DATA_NOACK 8 /* R/W: SCSI Data (no ACK) */
#define REG_ASTAT3 9 /* R: Adapter Status 3 */
#define ASTAT3_ACTDEASS BIT(0) /* Active deassert enabled */
#define ASTAT3_RAMOVRLY BIT(1) /* RAM overlay enabled */
#define ASTAT3_TARGERR BIT(2) /* Target error */
#define ASTAT3_IRQEN BIT(3) /* Interrupts enabled */
#define ASTAT3_IRQMASK 0xf0 /* Enabled interrupts mask */
#define REG_CFG1 10 /* R: Configuration Register 1 */
#define CFG1_BUS BIT(0) /* 0 = ISA */
#define CFG1_IRQ_MASK 0x0e /* IRQ jumpers */
#define CFG1_IO_MASK 0x30 /* I/O base jumpers */
#define CFG1_BIOS_MASK 0xc0 /* BIOS base jumpers */
#define REG_CFG2 11 /* R/W: Configuration Register 2 (@) */
#define CFG2_ROMDIS BIT(0) /* ROM disabled */
#define CFG2_RAMDIS BIT(1) /* RAM disabled */
#define CFG2_IRQEDGE BIT(2) /* Edge-triggered interrupts */
#define CFG2_NOWS BIT(3) /* No wait states */
#define CFG2_32BIT BIT(7) /* 32-bit mode */
#define REG_FIFO 12 /* R/W: FIFO */
#define REG_FIFO_COUNT 14 /* R: FIFO Data Count */
#ifdef CONFIG_PM_SLEEP
static const struct dev_pm_ops fdomain_pm_ops;

4
drivers/scsi/fdomain_isa.c
View File

@ -131,7 +131,7 @@ static int fdomain_isa_match(struct device *dev, unsigned int ndev)
if (!request_region(base, FDOMAIN_REGION_SIZE, "fdomain_isa"))
return 0;
irq = irqs[(inb(base + Configuration1) & 0x0e) >> 1];
irq = irqs[(inb(base + REG_CFG1) & 0x0e) >> 1];
if (sig)
@ -164,7 +164,7 @@ static int fdomain_isa_param_match(struct device *dev, unsigned int ndev)
}
if (irq_ <= 0)
irq_ = irqs[(inb(io[ndev] + Configuration1) & 0x0e) >> 1];
irq_ = irqs[(inb(io[ndev] + REG_CFG1) & 0x0e) >> 1];
sh = fdomain_create(io[ndev], irq_, scsi_id[ndev], dev);
if (!sh) {