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- /* $Id: floppy.h,v 1.18 1999/03/21 10:51:38 davem Exp $
- * asm-sparc64/floppy.h: Sparc specific parts of the Floppy driver.
- *
- * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- *
- * Ultra/PCI support added: Sep 1997 Eddie C. Dost (ecd@skynet.be)
- */
-
- #ifndef __ASM_SPARC64_FLOPPY_H
- #define __ASM_SPARC64_FLOPPY_H
-
- #include <linux/config.h>
- #include <linux/init.h>
-
- #include <asm/page.h>
- #include <asm/pgtable.h>
- #include <asm/system.h>
- #include <asm/idprom.h>
- #include <asm/oplib.h>
- #include <asm/auxio.h>
- #include <asm/sbus.h>
- #include <asm/irq.h>
-
-
- /*
- * Define this to enable exchanging drive 0 and 1 if only drive 1 is
- * probed on PCI machines.
- */
- #undef PCI_FDC_SWAP_DRIVES
-
-
- /* References:
- * 1) Netbsd Sun floppy driver.
- * 2) NCR 82077 controller manual
- * 3) Intel 82077 controller manual
- */
- struct sun_flpy_controller {
- volatile unsigned char status1_82077; /* Auxiliary Status reg. 1 */
- volatile unsigned char status2_82077; /* Auxiliary Status reg. 2 */
- volatile unsigned char dor_82077; /* Digital Output reg. */
- volatile unsigned char tapectl_82077; /* Tape Control reg */
- volatile unsigned char status_82077; /* Main Status Register. */
- #define drs_82077 status_82077 /* Digital Rate Select reg. */
- volatile unsigned char data_82077; /* Data fifo. */
- volatile unsigned char ___unused;
- volatile unsigned char dir_82077; /* Digital Input reg. */
- #define dcr_82077 dir_82077 /* Config Control reg. */
- };
-
- /* You'll only ever find one controller on an Ultra anyways. */
- static struct sun_flpy_controller *sun_fdc = (struct sun_flpy_controller *)-1;
- volatile unsigned char *fdc_status;
- static struct linux_sbus_device *floppy_sdev = NULL;
-
- struct sun_floppy_ops {
- unsigned char (*fd_inb) (unsigned long port);
- void (*fd_outb) (unsigned char value, unsigned long port);
- void (*fd_enable_dma) (void);
- void (*fd_disable_dma) (void);
- void (*fd_set_dma_mode) (int);
- void (*fd_set_dma_addr) (char *);
- void (*fd_set_dma_count) (int);
- unsigned int (*get_dma_residue) (void);
- void (*fd_enable_irq) (void);
- void (*fd_disable_irq) (void);
- int (*fd_request_irq) (void);
- void (*fd_free_irq) (void);
- int (*fd_eject) (int);
- };
-
- static struct sun_floppy_ops sun_fdops;
-
- #define fd_inb(port) sun_fdops.fd_inb(port)
- #define fd_outb(value,port) sun_fdops.fd_outb(value,port)
- #define fd_enable_dma() sun_fdops.fd_enable_dma()
- #define fd_disable_dma() sun_fdops.fd_disable_dma()
- #define fd_request_dma() (0) /* nothing... */
- #define fd_free_dma() /* nothing... */
- #define fd_clear_dma_ff() /* nothing... */
- #define fd_set_dma_mode(mode) sun_fdops.fd_set_dma_mode(mode)
- #define fd_set_dma_addr(addr) sun_fdops.fd_set_dma_addr(addr)
- #define fd_set_dma_count(count) sun_fdops.fd_set_dma_count(count)
- #define get_dma_residue(x) sun_fdops.get_dma_residue()
- #define fd_enable_irq() sun_fdops.fd_enable_irq()
- #define fd_disable_irq() sun_fdops.fd_disable_irq()
- #define fd_cacheflush(addr, size) /* nothing... */
- #define fd_request_irq() sun_fdops.fd_request_irq()
- #define fd_free_irq() sun_fdops.fd_free_irq()
- #define fd_eject(drive) sun_fdops.fd_eject(drive)
-
- static int FLOPPY_MOTOR_MASK = 0x10;
-
- /* Super paranoid... */
- #undef HAVE_DISABLE_HLT
-
- static int sun_floppy_types[2] = { 0, 0 };
-
- /* Here is where we catch the floppy driver trying to initialize,
- * therefore this is where we call the PROM device tree probing
- * routine etc. on the Sparc.
- */
- #define FLOPPY0_TYPE sun_floppy_init()
- #define FLOPPY1_TYPE sun_floppy_types[1]
-
- #define FDC1 ((unsigned long)sun_fdc)
- static int FDC2 = -1;
-
- #define N_FDC 1
- #define N_DRIVE 8
-
- /* No 64k boundary crossing problems on the Sparc. */
- #define CROSS_64KB(a,s) (0)
-
- static unsigned char sun_82077_fd_inb(unsigned long port)
- {
- udelay(5);
- switch(port & 7) {
- default:
- printk("floppy: Asked to read unknown port %lx\n", port);
- panic("floppy: Port bolixed.");
- case 4: /* FD_STATUS */
- return sun_fdc->status_82077 & ~STATUS_DMA;
- case 5: /* FD_DATA */
- return sun_fdc->data_82077;
- case 7: /* FD_DIR */
- /* XXX: Is DCL on 0x80 in sun4m? */
- return sun_fdc->dir_82077;
- };
- panic("sun_82072_fd_inb: How did I get here?");
- }
-
- static void sun_82077_fd_outb(unsigned char value, unsigned long port)
- {
- udelay(5);
- switch(port & 7) {
- default:
- printk("floppy: Asked to write to unknown port %lx\n", port);
- panic("floppy: Port bolixed.");
- case 2: /* FD_DOR */
- /* Happily, the 82077 has a real DOR register. */
- sun_fdc->dor_82077 = value;
- break;
- case 5: /* FD_DATA */
- sun_fdc->data_82077 = value;
- break;
- case 7: /* FD_DCR */
- sun_fdc->dcr_82077 = value;
- break;
- case 4: /* FD_STATUS */
- sun_fdc->status_82077 = value;
- break;
- };
- return;
- }
-
- /* For pseudo-dma (Sun floppy drives have no real DMA available to
- * them so we must eat the data fifo bytes directly ourselves) we have
- * three state variables. doing_pdma tells our inline low-level
- * assembly floppy interrupt entry point whether it should sit and eat
- * bytes from the fifo or just transfer control up to the higher level
- * floppy interrupt c-code. I tried very hard but I could not get the
- * pseudo-dma to work in c-code without getting many overruns and
- * underruns. If non-zero, doing_pdma encodes the direction of
- * the transfer for debugging. 1=read 2=write
- */
- char *pdma_vaddr;
- unsigned long pdma_size;
- volatile int doing_pdma = 0;
-
- /* This is software state */
- char *pdma_base = 0;
- unsigned long pdma_areasize;
-
- /* Common routines to all controller types on the Sparc. */
- static __inline__ void virtual_dma_init(void)
- {
- /* nothing... */
- }
-
- static void sun_fd_disable_dma(void)
- {
- doing_pdma = 0;
- if (pdma_base) {
- mmu_unlockarea(pdma_base, pdma_areasize);
- pdma_base = 0;
- }
- }
-
- static void sun_fd_set_dma_mode(int mode)
- {
- switch(mode) {
- case DMA_MODE_READ:
- doing_pdma = 1;
- break;
- case DMA_MODE_WRITE:
- doing_pdma = 2;
- break;
- default:
- printk("Unknown dma mode %d\n", mode);
- panic("floppy: Giving up...");
- }
- }
-
- static void sun_fd_set_dma_addr(char *buffer)
- {
- pdma_vaddr = buffer;
- }
-
- static void sun_fd_set_dma_count(int length)
- {
- pdma_size = length;
- }
-
- static void sun_fd_enable_dma(void)
- {
- pdma_vaddr = mmu_lockarea(pdma_vaddr, pdma_size);
- pdma_base = pdma_vaddr;
- pdma_areasize = pdma_size;
- }
-
- /* Our low-level entry point in arch/sparc/kernel/entry.S */
- extern void floppy_hardint(int irq, void *unused, struct pt_regs *regs);
-
- static int sun_fd_request_irq(void)
- {
- static int once = 0;
- int error;
-
- if(!once) {
- once = 1;
-
- error = request_fast_irq(FLOPPY_IRQ, floppy_hardint,
- SA_INTERRUPT, "floppy", NULL);
-
- return ((error == 0) ? 0 : -1);
- }
- return 0;
- }
-
- static void sun_fd_enable_irq(void)
- {
- }
-
- static void sun_fd_disable_irq(void)
- {
- }
-
- static void sun_fd_free_irq(void)
- {
- }
-
- static unsigned int sun_get_dma_residue(void)
- {
- /* XXX This isn't really correct. XXX */
- return 0;
- }
-
- static int sun_fd_eject(int drive)
- {
- set_dor(0x00, 0xff, 0x90);
- udelay(500);
- set_dor(0x00, 0x6f, 0x00);
- udelay(500);
- return 0;
- }
-
- #ifdef CONFIG_PCI
- #include <asm/ebus.h>
- #include <asm/ns87303.h>
-
- static struct linux_ebus_dma *sun_pci_fd_ebus_dma;
- static int sun_pci_broken_drive = -1;
-
- extern void floppy_interrupt(int irq, void *dev_id, struct pt_regs *regs);
-
- static unsigned char sun_pci_fd_inb(unsigned long port)
- {
- return inb(port);
- }
-
- static void sun_pci_fd_outb(unsigned char val, unsigned long port)
- {
- outb(val, port);
- }
-
- static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port)
- {
- /*
- * XXX: Due to SUN's broken floppy connector on AX and AXi
- * we need to turn on MOTOR_0 also, if the floppy is
- * jumpered to DS1 (like most PC floppies are). I hope
- * this does not hurt correct hardware like the AXmp.
- * (Eddie, Sep 12 1998).
- */
- if (port == ((unsigned long)sun_fdc) + 2) {
- if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) {
- val |= 0x10;
- }
- }
- outb(val, port);
- }
-
- #ifdef PCI_FDC_SWAP_DRIVES
- static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long port)
- {
- /*
- * XXX: Due to SUN's broken floppy connector on AX and AXi
- * we need to turn on MOTOR_0 also, if the floppy is
- * jumpered to DS1 (like most PC floppies are). I hope
- * this does not hurt correct hardware like the AXmp.
- * (Eddie, Sep 12 1998).
- */
- if (port == ((unsigned long)sun_fdc) + 2) {
- if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) {
- val &= ~(0x03);
- val |= 0x21;
- }
- }
- outb(val, port);
- }
- #endif /* PCI_FDC_SWAP_DRIVES */
-
- static void sun_pci_fd_reset_dma(void)
- {
- unsigned int dcsr;
-
- writel(EBUS_DCSR_RESET, &sun_pci_fd_ebus_dma->dcsr);
-
- dcsr = EBUS_DCSR_BURST_SZ_16 | EBUS_DCSR_TCI_DIS |
- EBUS_DCSR_EN_CNT | EBUS_DCSR_INT_EN;
- writel(dcsr, (unsigned long)&sun_pci_fd_ebus_dma->dcsr);
- }
-
- static void sun_pci_fd_enable_dma(void)
- {
- unsigned int dcsr;
-
- dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
- dcsr |= EBUS_DCSR_EN_DMA;
- writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
- }
-
- static void sun_pci_fd_disable_dma(void)
- {
- unsigned int dcsr;
-
- dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
- while (dcsr & EBUS_DCSR_DRAIN)
- dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
- dcsr &= ~(EBUS_DCSR_EN_DMA);
- if (dcsr & EBUS_DCSR_ERR_PEND)
- sun_pci_fd_reset_dma();
- writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
- }
-
- static void sun_pci_fd_set_dma_mode(int mode)
- {
- unsigned int dcsr;
-
- dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
- dcsr |= EBUS_DCSR_EN_CNT | EBUS_DCSR_TC;
- /*
- * For EBus WRITE means to system memory, which is
- * READ for us.
- */
- if (mode == DMA_MODE_WRITE)
- dcsr &= ~(EBUS_DCSR_WRITE);
- else
- dcsr |= EBUS_DCSR_WRITE;
- writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
- }
-
- static void sun_pci_fd_set_dma_count(int length)
- {
- writel(length, &sun_pci_fd_ebus_dma->dbcr);
- }
-
- static void sun_pci_fd_set_dma_addr(char *buffer)
- {
- unsigned int addr = virt_to_bus(buffer);
- writel(addr, &sun_pci_fd_ebus_dma->dacr);
- }
-
- static unsigned int sun_pci_get_dma_residue(void)
- {
- return readl(&sun_pci_fd_ebus_dma->dbcr);
- }
-
- static void sun_pci_fd_enable_irq(void)
- {
- unsigned int dcsr;
-
- dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
- dcsr |= EBUS_DCSR_INT_EN;
- writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
- }
-
- static void sun_pci_fd_disable_irq(void)
- {
- unsigned int dcsr;
-
- dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
- dcsr &= ~(EBUS_DCSR_INT_EN);
- writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
- }
-
- static int sun_pci_fd_request_irq(void)
- {
- int err;
-
- err = request_irq(FLOPPY_IRQ, floppy_interrupt, SA_SHIRQ,
- "floppy", sun_fdc);
- if (err)
- return -1;
- sun_pci_fd_enable_irq();
- return 0;
- }
-
- static void sun_pci_fd_free_irq(void)
- {
- sun_pci_fd_disable_irq();
- free_irq(FLOPPY_IRQ, sun_fdc);
- }
-
- static int sun_pci_fd_eject(int drive)
- {
- return -EINVAL;
- }
-
-
- /*
- * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI,
- * even if this is configured using DS1, thus looks like /dev/fd1 with
- * the cabling used in Ultras.
- */
- #define DOR (port + 2)
- #define MSR (port + 4)
- #define FIFO (port + 5)
-
- static void sun_pci_fd_out_byte(unsigned long port, unsigned char val,
- unsigned long reg)
- {
- unsigned char status;
- int timeout = 1000;
-
- while (!((status = inb(MSR)) & 0x80) && --timeout)
- udelay(100);
- outb(val, reg);
- }
-
- static unsigned char sun_pci_fd_sensei(unsigned long port)
- {
- unsigned char result[2] = { 0x70, 0x00 };
- unsigned char status;
- int i = 0;
-
- sun_pci_fd_out_byte(port, 0x08, FIFO);
- do {
- int timeout = 1000;
-
- while (!((status = inb(MSR)) & 0x80) && --timeout)
- udelay(100);
-
- if (!timeout)
- break;
-
- if ((status & 0xf0) == 0xd0)
- result[i++] = inb(FIFO);
- else
- break;
- } while (i < 2);
-
- return result[0];
- }
-
- static void sun_pci_fd_reset(unsigned long port)
- {
- unsigned char mask = 0x00;
- unsigned char status;
- int timeout = 10000;
-
- outb(0x80, MSR);
- do {
- status = sun_pci_fd_sensei(port);
- if ((status & 0xc0) == 0xc0)
- mask |= 1 << (status & 0x03);
- else
- udelay(100);
- } while ((mask != 0x0f) && --timeout);
- }
-
- static int sun_pci_fd_test_drive(unsigned long port, int drive)
- {
- unsigned char status, data;
- int timeout = 1000;
- int ready;
-
- sun_pci_fd_reset(port);
-
- data = (0x10 << drive) | 0x0c | drive;
- sun_pci_fd_out_byte(port, data, DOR);
-
- sun_pci_fd_out_byte(port, 0x07, FIFO);
- sun_pci_fd_out_byte(port, drive & 0x03, FIFO);
-
- do {
- udelay(100);
- status = sun_pci_fd_sensei(port);
- } while (((status & 0xc0) == 0x80) && --timeout);
-
- if (!timeout)
- ready = 0;
- else
- ready = (status & 0x10) ? 0 : 1;
-
- sun_pci_fd_reset(port);
- return ready;
- }
- #undef FIFO
- #undef MSR
- #undef DOR
-
- #endif /* CONFIG_PCI */
-
- static struct linux_prom_registers fd_regs[2];
-
- __initfunc(static unsigned long sun_floppy_init(void))
- {
- char state[128];
- int fd_node, num_regs;
- struct linux_sbus *bus;
- struct linux_sbus_device *sdev = NULL;
- static int initialized = 0;
-
- if (initialized)
- return sun_floppy_types[0];
- initialized = 1;
-
- for_all_sbusdev (sdev, bus) {
- if (!strcmp(sdev->prom_name, "SUNW,fdtwo"))
- break;
- }
- if(sdev) {
- floppy_sdev = sdev;
- FLOPPY_IRQ = sdev->irqs[0];
- } else {
- #ifdef CONFIG_PCI
- struct linux_ebus *ebus;
- struct linux_ebus_device *edev = 0;
-
- for_each_ebus(ebus) {
- for_each_ebusdev(edev, ebus) {
- if (!strcmp(edev->prom_name, "fdthree"))
- goto ebus_done;
- }
- }
- ebus_done:
- if (!edev)
- return 0;
-
- prom_getproperty(edev->prom_node, "status",
- state, sizeof(state));
- if(!strncmp(state, "disabled", 8))
- return 0;
-
- if (check_region(edev->base_address[1],
- sizeof(struct linux_ebus_dma))) {
- printk("sun_floppy_init: can't get region at %016lx\n",
- edev->base_address[1]);
- return 0;
- }
- request_region(edev->base_address[1],
- sizeof(struct linux_ebus_dma), "floppy DMA");
-
- sun_fdc = (struct sun_flpy_controller *)edev->base_address[0];
- FLOPPY_IRQ = edev->irqs[0];
-
- sun_pci_fd_ebus_dma = (struct linux_ebus_dma *)
- edev->base_address[1];
- sun_pci_fd_reset_dma();
-
- sun_fdops.fd_inb = sun_pci_fd_inb;
- sun_fdops.fd_outb = sun_pci_fd_outb;
-
- use_virtual_dma = 0;
- sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma;
- sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma;
- sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode;
- sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr;
- sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count;
- sun_fdops.get_dma_residue = sun_pci_get_dma_residue;
-
- sun_fdops.fd_enable_irq = sun_pci_fd_enable_irq;
- sun_fdops.fd_disable_irq = sun_pci_fd_disable_irq;
- sun_fdops.fd_request_irq = sun_pci_fd_request_irq;
- sun_fdops.fd_free_irq = sun_pci_fd_free_irq;
-
- sun_fdops.fd_eject = sun_pci_fd_eject;
-
- fdc_status = &sun_fdc->status_82077;
- FLOPPY_MOTOR_MASK = 0xf0;
-
- /*
- * XXX: Find out on which machines this is really needed.
- */
- if (1) {
- sun_pci_broken_drive = 1;
- sun_fdops.fd_outb = sun_pci_fd_broken_outb;
- }
-
- allowed_drive_mask = 0;
- if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0))
- sun_floppy_types[0] = 4;
- if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1))
- sun_floppy_types[1] = 4;
-
- #ifdef PCI_FDC_SWAP_DRIVES
- /*
- * If only Floppy 1 is present, swap drives.
- */
- if (!sun_floppy_types[0] && sun_floppy_types[1]) {
- unsigned long config = 0;
- unsigned char tmp;
-
- for_each_ebus(ebus) {
- for_each_ebusdev(edev, ebus) {
- if (!strcmp(edev->prom_name, "ecpp")) {
- config = edev->base_address[1];
- goto config_done;
- }
- }
- }
- config_done:
-
- /*
- * Sanity check, is this really the NS87303?
- */
- switch (config & 0x3ff) {
- case 0x02e:
- case 0x15c:
- case 0x26e:
- case 0x398:
- break;
- default:
- config = 0;
- }
-
- if (!config)
- return sun_floppy_types[0];
-
- /*
- * Set the drive exchange bit in FCR on NS87303,
- * make shure other bits are sane before doing so.
- */
- tmp = ns87303_readb(config, FER);
- tmp &= ~(FER_EDM);
- ns87303_writeb(config, FER, tmp);
- tmp = ns87303_readb(config, ASC);
- tmp &= ~(ASC_DRV2_SEL);
- ns87303_writeb(config, ASC, tmp);
- tmp = ns87303_readb(config, FCR);
- tmp |= FCR_LDE;
- ns87303_writeb(config, FCR, tmp);
-
- tmp = sun_floppy_types[0];
- sun_floppy_types[0] = sun_floppy_types[1];
- sun_floppy_types[1] = tmp;
-
- if (sun_pci_broken_drive != -1) {
- sun_pci_broken_drive = 1 - sun_pci_broken_drive;
- sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb;
- }
- }
- #endif /* PCI_FDC_SWAP_DRIVES */
-
- return sun_floppy_types[0];
- #else
- return 0;
- #endif
- }
- fd_node = sdev->prom_node;
- prom_getproperty(fd_node, "status", state, sizeof(state));
- if(!strncmp(state, "disabled", 8))
- return 0;
- num_regs = prom_getproperty(fd_node, "reg", (char *) fd_regs,
- sizeof(fd_regs));
- num_regs = (num_regs / sizeof(fd_regs[0]));
- prom_apply_sbus_ranges(sdev->my_bus, fd_regs, num_regs, sdev);
- /*
- * We cannot do sparc_alloc_io here: it does request_region,
- * which the generic floppy driver tries to do once again.
- */
- sun_fdc = (struct sun_flpy_controller *)
- (PAGE_OFFSET + fd_regs[0].phys_addr +
- (((unsigned long)fd_regs[0].which_io) << 32));
-
- /* Last minute sanity check... */
- if(sun_fdc->status1_82077 == 0xff) {
- sun_fdc = (struct sun_flpy_controller *)-1;
- return 0;
- }
-
- sun_fdops.fd_inb = sun_82077_fd_inb;
- sun_fdops.fd_outb = sun_82077_fd_outb;
-
- can_use_virtual_dma = use_virtual_dma = 1;
- sun_fdops.fd_enable_dma = sun_fd_enable_dma;
- sun_fdops.fd_disable_dma = sun_fd_disable_dma;
- sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
- sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
- sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
- sun_fdops.get_dma_residue = sun_get_dma_residue;
-
- sun_fdops.fd_enable_irq = sun_fd_enable_irq;
- sun_fdops.fd_disable_irq = sun_fd_disable_irq;
- sun_fdops.fd_request_irq = sun_fd_request_irq;
- sun_fdops.fd_free_irq = sun_fd_free_irq;
-
- sun_fdops.fd_eject = sun_fd_eject;
-
- fdc_status = &sun_fdc->status_82077;
-
- /* Success... */
- allowed_drive_mask = 0x01;
- sun_floppy_types[0] = 4;
- sun_floppy_types[1] = 0;
-
- return sun_floppy_types[0];
- }
-
- #endif /* !(__ASM_SPARC64_FLOPPY_H) */
-