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/* SPDX-License-Identifier: GPL-2.0 / / floppy.h: Sparc specific parts of the Floppy driver. * * Copyright (C) 1996, 2007, 2008 David S. Miller (davem@davemloft.net) * 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/of.h> #include <linux/of_device.h> #include <linux/dma-mapping.h> #include <asm/auxio.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; unsigned long fdc_status; static struct platform_device floppy_op = 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); 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_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) / 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) #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 sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA; case 5: / FD_DATA / return sbus_readb(&sun_fdc->data_82077); case 7: / FD_DIR / / XXX: Is DCL on 0x80 in sun4m? / return sbus_readb(&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. / sbus_writeb(value, &sun_fdc->dor_82077); break; case 5: / FD_DATA / sbus_writeb(value, &sun_fdc->data_82077); break; case 7: / FD_DCR / sbus_writeb(value, &sun_fdc->dcr_82077); break; case 4: / FD_STATUS / sbus_writeb(value, &sun_fdc->status_82077); 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 / unsigned char pdma_vaddr; unsigned long pdma_size; volatile int doing_pdma = 0; /* This is software state / char pdma_base = NULL; unsigned long pdma_areasize; /* Common routines to all controller types on the Sparc. / static void sun_fd_disable_dma(void) { doing_pdma = 0; pdma_base = NULL; } 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_base = pdma_vaddr; pdma_areasize = pdma_size; } irqreturn_t sparc_floppy_irq(int irq, void dev_cookie) { if (likely(doing_pdma)) { void __iomem stat = (void __iomem ) fdc_status; unsigned char vaddr = pdma_vaddr; unsigned long size = pdma_size; u8 val; while (size) { val = readb(stat); if (unlikely(!(val & 0x80))) { pdma_vaddr = vaddr; pdma_size = size; return IRQ_HANDLED; } if (unlikely(!(val & 0x20))) { pdma_vaddr = vaddr; pdma_size = size; doing_pdma = 0; goto main_interrupt; } if (val & 0x40) { /* read / vaddr++ = readb(stat + 1); } else { unsigned char data = vaddr++; / write / writeb(data, stat + 1); } size--; } pdma_vaddr = vaddr; pdma_size = size; / Send Terminal Count pulse to floppy controller. / val = readb(auxio_register); val \|= AUXIO_AUX1_FTCNT; writeb(val, auxio_register); val &= ~AUXIO_AUX1_FTCNT; writeb(val, auxio_register); doing_pdma = 0; } main_interrupt: return floppy_interrupt(irq, dev_cookie); } static int sun_fd_request_irq(void) { static int once = 0; int error; if(!once) { once = 1; error = request_irq(FLOPPY_IRQ, sparc_floppy_irq, 0, "floppy", NULL); return ((error == 0) ? 0 : -1); } return 0; } 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; } #include <asm/ebus_dma.h> #include <asm/ns87303.h> static struct ebus_dma_info sun_pci_fd_ebus_dma; static struct device sun_floppy_dev; static int sun_pci_broken_drive = -1; struct sun_pci_dma_op { unsigned int addr; int len; int direction; char buf; }; static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL}; static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL}; irqreturn_t floppy_interrupt(int irq, void dev_id); static unsigned char sun_pci_fd_inb(unsigned long port) { udelay(5); return inb(port); } static void sun_pci_fd_outb(unsigned char val, unsigned long port) { udelay(5); outb(val, port); } static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port) { udelay(5); /* * 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) { udelay(5); / * 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_enable_dma(void) { BUG_ON((NULL == sun_pci_dma_pending.buf) \|\| (0 == sun_pci_dma_pending.len) \|\| (0 == sun_pci_dma_pending.direction)); sun_pci_dma_current.buf = sun_pci_dma_pending.buf; sun_pci_dma_current.len = sun_pci_dma_pending.len; sun_pci_dma_current.direction = sun_pci_dma_pending.direction; sun_pci_dma_pending.buf = NULL; sun_pci_dma_pending.len = 0; sun_pci_dma_pending.direction = 0; sun_pci_dma_pending.addr = -1U; sun_pci_dma_current.addr = dma_map_single(sun_floppy_dev, sun_pci_dma_current.buf, sun_pci_dma_current.len, sun_pci_dma_current.direction); ebus_dma_enable(&sun_pci_fd_ebus_dma, 1); if (ebus_dma_request(&sun_pci_fd_ebus_dma, sun_pci_dma_current.addr, sun_pci_dma_current.len)) BUG(); } static void sun_pci_fd_disable_dma(void) { ebus_dma_enable(&sun_pci_fd_ebus_dma, 0); if (sun_pci_dma_current.addr != -1U) dma_unmap_single(sun_floppy_dev, sun_pci_dma_current.addr, sun_pci_dma_current.len, sun_pci_dma_current.direction); sun_pci_dma_current.addr = -1U; } static void sun_pci_fd_set_dma_mode(int mode) { if (mode == DMA_MODE_WRITE) sun_pci_dma_pending.direction = DMA_TO_DEVICE; else sun_pci_dma_pending.direction = DMA_FROM_DEVICE; ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE); } static void sun_pci_fd_set_dma_count(int length) { sun_pci_dma_pending.len = length; } static void sun_pci_fd_set_dma_addr(char buffer) { sun_pci_dma_pending.buf = buffer; } static unsigned int sun_pci_get_dma_residue(void) { return ebus_dma_residue(&sun_pci_fd_ebus_dma); } static int sun_pci_fd_request_irq(void) { return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1); } static void sun_pci_fd_free_irq(void) { ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0); } static int sun_pci_fd_eject(int drive) { return -EINVAL; } void sun_pci_fd_dma_callback(struct ebus_dma_info p, int event, void cookie) { floppy_interrupt(0, NULL); } /* * 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 static int __init ebus_fdthree_p(struct device_node dp) { if (of_node_name_eq(dp, "fdthree")) return 1; if (of_node_name_eq(dp, "floppy")) { const char compat; compat = of_get_property(dp, "compatible", NULL); if (compat && !strcmp(compat, "fdthree")) return 1; } return 0; } static unsigned long __init sun_floppy_init(void) { static int initialized = 0; struct device_node dp; struct platform_device op; const char prop; char state[128]; if (initialized) return sun_floppy_types[0]; initialized = 1; op = NULL; for_each_node_by_name(dp, "SUNW,fdtwo") { if (!of_node_name_eq(dp->parent, "sbus")) continue; op = of_find_device_by_node(dp); if (op) break; } if (op) { floppy_op = op; FLOPPY_IRQ = op->archdata.irqs[0]; } else { struct device_node ebus_dp; void __iomem auxio_reg; const char state_prop; unsigned long config; dp = NULL; for_each_node_by_name(ebus_dp, "ebus") { for (dp = ebus_dp->child; dp; dp = dp->sibling) { if (ebus_fdthree_p(dp)) goto found_fdthree; } } found_fdthree: if (!dp) return 0; op = of_find_device_by_node(dp); if (!op) return 0; state_prop = of_get_property(op->dev.of_node, "status", NULL); if (state_prop && !strncmp(state_prop, "disabled", 8)) return 0; FLOPPY_IRQ = op->archdata.irqs[0]; / Make sure the high density bit is set, some systems * (most notably Ultra5/Ultra10) come up with it clear. / auxio_reg = (void __iomem ) op->resource[2].start; writel(readl(auxio_reg)\|0x2, auxio_reg); sun_floppy_dev = &op->dev; spin_lock_init(&sun_pci_fd_ebus_dma.lock); /* XXX ioremap / sun_pci_fd_ebus_dma.regs = (void __iomem ) op->resource[1].start; if (!sun_pci_fd_ebus_dma.regs) return 0; sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER \| EBUS_DMA_FLAG_TCI_DISABLE); sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback; sun_pci_fd_ebus_dma.client_cookie = NULL; sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ; strcpy(sun_pci_fd_ebus_dma.name, "floppy"); if (ebus_dma_register(&sun_pci_fd_ebus_dma)) return 0; /* XXX ioremap / sun_fdc = (struct sun_flpy_controller ) op->resource[0].start; sun_fdops.fd_inb = sun_pci_fd_inb; sun_fdops.fd_outb = sun_pci_fd_outb; can_use_virtual_dma = 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_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 = (unsigned long) &sun_fdc->status_82077; /* * 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; / * Find NS87303 SuperIO config registers (through ecpp). / config = 0; for (dp = ebus_dp->child; dp; dp = dp->sibling) { if (of_node_name_eq(dp, "ecpp")) { struct platform_device ecpp_op; ecpp_op = of_find_device_by_node(dp); if (ecpp_op) config = ecpp_op->resource[1].start; 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]; / Enable PC-AT mode. / ns87303_modify(config, ASC, 0, 0xc0); #ifdef PCI_FDC_SWAP_DRIVES / * If only Floppy 1 is present, swap drives. / if (!sun_floppy_types[0] && sun_floppy_types[1]) { / * Set the drive exchange bit in FCR on NS87303, * make sure other bits are sane before doing so. / ns87303_modify(config, FER, FER_EDM, 0); ns87303_modify(config, ASC, ASC_DRV2_SEL, 0); ns87303_modify(config, FCR, 0, FCR_LDE); config = sun_floppy_types[0]; sun_floppy_types[0] = sun_floppy_types[1]; sun_floppy_types[1] = config; 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]; } prop = of_get_property(op->dev.of_node, "status", NULL); if (prop && !strncmp(state, "disabled", 8)) return 0; / * We cannot do of_ioremap here: it does request_region, * which the generic floppy driver tries to do once again. * But we must use the sdev resource values as they have * had parent ranges applied. / sun_fdc = (struct sun_flpy_controller ) (op->resource[0].start + ((op->resource[0].flags & 0x1ffUL) << 32UL)); /* Last minute sanity check... / if (sbus_readb(&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_request_irq = sun_fd_request_irq; sun_fdops.fd_free_irq = sun_fd_free_irq; sun_fdops.fd_eject = sun_fd_eject; fdc_status = (unsigned long) &sun_fdc->status_82077; /* Success... / allowed_drive_mask = 0x01; sun_floppy_types[0] = 4; sun_floppy_types[1] = 0; return sun_floppy_types[0]; } #define EXTRA_FLOPPY_PARAMS static DEFINE_SPINLOCK(dma_spin_lock); #define claim_dma_lock() \ ({ unsigned long flags; \ spin_lock_irqsave(&dma_spin_lock, flags); \ flags; \ }) #define release_dma_lock(__flags) \ spin_unlock_irqrestore(&dma_spin_lock, __flags); #endif / !(__ASM_SPARC64_FLOPPY_H) */

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