parport_sunbpp.c
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上传日期:2013-02-24
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- /* $Id: parport_sunbpp.c,v 1.12 2001/05/26 03:01:42 davem Exp $
- * Parallel-port routines for Sun architecture
- *
- * Author: Derrick J. Brashear <shadow@dementia.org>
- *
- * based on work by:
- * Phil Blundell <Philip.Blundell@pobox.com>
- * Tim Waugh <tim@cyberelk.demon.co.uk>
- * Jose Renau <renau@acm.org>
- * David Campbell <campbell@tirian.che.curtin.edu.au>
- * Grant Guenther <grant@torque.net>
- * Eddie C. Dost <ecd@skynet.be>
- * Stephen Williams (steve@icarus.com)
- * Gus Baldauf (gbaldauf@ix.netcom.com)
- * Peter Zaitcev
- * Tom Dyas
- */
- #include <linux/string.h>
- #include <linux/module.h>
- #include <linux/delay.h>
- #include <linux/errno.h>
- #include <linux/ioport.h>
- #include <linux/kernel.h>
- #include <linux/slab.h>
- #include <linux/init.h>
- #include <linux/parport.h>
- #include <asm/ptrace.h>
- #include <linux/interrupt.h>
- #include <asm/io.h>
- #include <asm/oplib.h> /* OpenProm Library */
- #include <asm/sbus.h>
- #include <asm/dma.h> /* BPP uses LSI 64854 for DMA */
- #include <asm/irq.h>
- #include <asm/sunbpp.h>
- #undef __SUNBPP_DEBUG
- #ifdef __SUNBPP_DEBUG
- #define dprintk(x) printk x
- #else
- #define dprintk(x)
- #endif
- static void parport_sunbpp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
- {
- parport_generic_irq(irq, (struct parport *) dev_id, regs);
- }
- static void parport_sunbpp_disable_irq(struct parport *p)
- {
- struct bpp_regs *regs = (struct bpp_regs *)p->base;
- u32 tmp;
- tmp = sbus_readl(®s->p_csr);
- tmp &= ~DMA_INT_ENAB;
- sbus_writel(tmp, ®s->p_csr);
- }
- static void parport_sunbpp_enable_irq(struct parport *p)
- {
- struct bpp_regs *regs = (struct bpp_regs *)p->base;
- u32 tmp;
- tmp = sbus_readl(®s->p_csr);
- tmp |= DMA_INT_ENAB;
- sbus_writel(tmp, ®s->p_csr);
- }
- static void parport_sunbpp_write_data(struct parport *p, unsigned char d)
- {
- struct bpp_regs *regs = (struct bpp_regs *)p->base;
- sbus_writeb(d, ®s->p_dr);
- dprintk((KERN_DEBUG "wrote 0x%xn", d));
- }
- static unsigned char parport_sunbpp_read_data(struct parport *p)
- {
- struct bpp_regs *regs = (struct bpp_regs *)p->base;
- return sbus_readb(®s->p_dr);
- }
- #if 0
- static void control_pc_to_sunbpp(struct parport *p, unsigned char status)
- {
- struct bpp_regs *regs = (struct bpp_regs *)p->base;
- unsigned char value_tcr = sbus_readb(®s->p_tcr);
- unsigned char value_or = sbus_readb(®s->p_or);
- if (status & PARPORT_CONTROL_STROBE)
- value_tcr |= P_TCR_DS;
- if (status & PARPORT_CONTROL_AUTOFD)
- value_or |= P_OR_AFXN;
- if (status & PARPORT_CONTROL_INIT)
- value_or |= P_OR_INIT;
- if (status & PARPORT_CONTROL_SELECT)
- value_or |= P_OR_SLCT_IN;
- sbus_writeb(value_or, ®s->p_or);
- sbus_writeb(value_tcr, ®s->p_tcr);
- }
- #endif
- static unsigned char status_sunbpp_to_pc(struct parport *p)
- {
- struct bpp_regs *regs = (struct bpp_regs *)p->base;
- unsigned char bits = 0;
- unsigned char value_tcr = sbus_readb(®s->p_tcr);
- unsigned char value_ir = sbus_readb(®s->p_ir);
- if (!(value_ir & P_IR_ERR))
- bits |= PARPORT_STATUS_ERROR;
- if (!(value_ir & P_IR_SLCT))
- bits |= PARPORT_STATUS_SELECT;
- if (!(value_ir & P_IR_PE))
- bits |= PARPORT_STATUS_PAPEROUT;
- if (value_tcr & P_TCR_ACK)
- bits |= PARPORT_STATUS_ACK;
- if (!(value_tcr & P_TCR_BUSY))
- bits |= PARPORT_STATUS_BUSY;
- dprintk((KERN_DEBUG "tcr 0x%x ir 0x%xn", regs->p_tcr, regs->p_ir));
- dprintk((KERN_DEBUG "read status 0x%xn", bits));
- return bits;
- }
- static unsigned char control_sunbpp_to_pc(struct parport *p)
- {
- struct bpp_regs *regs = (struct bpp_regs *)p->base;
- unsigned char bits = 0;
- unsigned char value_tcr = sbus_readb(®s->p_tcr);
- unsigned char value_or = sbus_readb(®s->p_or);
- if (!(value_tcr & P_TCR_DS))
- bits |= PARPORT_CONTROL_STROBE;
- if (!(value_or & P_OR_AFXN))
- bits |= PARPORT_CONTROL_AUTOFD;
- if (!(value_or & P_OR_INIT))
- bits |= PARPORT_CONTROL_INIT;
- if (value_or & P_OR_SLCT_IN)
- bits |= PARPORT_CONTROL_SELECT;
- dprintk((KERN_DEBUG "tcr 0x%x or 0x%xn", regs->p_tcr, regs->p_or));
- dprintk((KERN_DEBUG "read control 0x%xn", bits));
- return bits;
- }
- static unsigned char parport_sunbpp_read_control(struct parport *p)
- {
- return control_sunbpp_to_pc(p);
- }
- static unsigned char parport_sunbpp_frob_control(struct parport *p,
- unsigned char mask,
- unsigned char val)
- {
- struct bpp_regs *regs = (struct bpp_regs *)p->base;
- unsigned char value_tcr = sbus_readb(®s->p_tcr);
- unsigned char value_or = sbus_readb(®s->p_or);
- dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%xn", regs->p_tcr, regs->p_or));
- if (mask & PARPORT_CONTROL_STROBE) {
- if (val & PARPORT_CONTROL_STROBE) {
- value_tcr &= ~P_TCR_DS;
- } else {
- value_tcr |= P_TCR_DS;
- }
- }
- if (mask & PARPORT_CONTROL_AUTOFD) {
- if (val & PARPORT_CONTROL_AUTOFD) {
- value_or &= ~P_OR_AFXN;
- } else {
- value_or |= P_OR_AFXN;
- }
- }
- if (mask & PARPORT_CONTROL_INIT) {
- if (val & PARPORT_CONTROL_INIT) {
- value_or &= ~P_OR_INIT;
- } else {
- value_or |= P_OR_INIT;
- }
- }
- if (mask & PARPORT_CONTROL_SELECT) {
- if (val & PARPORT_CONTROL_SELECT) {
- value_or |= P_OR_SLCT_IN;
- } else {
- value_or &= ~P_OR_SLCT_IN;
- }
- }
- sbus_writeb(value_or, ®s->p_or);
- sbus_writeb(value_tcr, ®s->p_tcr);
- dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%xn", regs->p_tcr, regs->p_or));
- return parport_sunbpp_read_control(p);
- }
- static void parport_sunbpp_write_control(struct parport *p, unsigned char d)
- {
- const unsigned char wm = (PARPORT_CONTROL_STROBE |
- PARPORT_CONTROL_AUTOFD |
- PARPORT_CONTROL_INIT |
- PARPORT_CONTROL_SELECT);
- parport_sunbpp_frob_control (p, wm, d & wm);
- }
- static unsigned char parport_sunbpp_read_status(struct parport *p)
- {
- return status_sunbpp_to_pc(p);
- }
- static void parport_sunbpp_data_forward (struct parport *p)
- {
- struct bpp_regs *regs = (struct bpp_regs *)p->base;
- unsigned char value_tcr = sbus_readb(®s->p_tcr);
- dprintk((KERN_DEBUG "forwardn"));
- value_tcr &= ~P_TCR_DIR;
- sbus_writeb(value_tcr, ®s->p_tcr);
- }
- static void parport_sunbpp_data_reverse (struct parport *p)
- {
- struct bpp_regs *regs = (struct bpp_regs *)p->base;
- u8 val = sbus_readb(®s->p_tcr);
- dprintk((KERN_DEBUG "reversen"));
- val |= P_TCR_DIR;
- sbus_writeb(val, ®s->p_tcr);
- }
- static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s)
- {
- s->u.pc.ctr = 0xc;
- s->u.pc.ecr = 0x0;
- }
- static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s)
- {
- s->u.pc.ctr = parport_sunbpp_read_control(p);
- }
- static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s)
- {
- parport_sunbpp_write_control(p, s->u.pc.ctr);
- }
- static void parport_sunbpp_inc_use_count(void)
- {
- #ifdef MODULE
- MOD_INC_USE_COUNT;
- #endif
- }
- static void parport_sunbpp_dec_use_count(void)
- {
- #ifdef MODULE
- MOD_DEC_USE_COUNT;
- #endif
- }
- static struct parport_operations parport_sunbpp_ops =
- {
- parport_sunbpp_write_data,
- parport_sunbpp_read_data,
- parport_sunbpp_write_control,
- parport_sunbpp_read_control,
- parport_sunbpp_frob_control,
- parport_sunbpp_read_status,
- parport_sunbpp_enable_irq,
- parport_sunbpp_disable_irq,
- parport_sunbpp_data_forward,
- parport_sunbpp_data_reverse,
- parport_sunbpp_init_state,
- parport_sunbpp_save_state,
- parport_sunbpp_restore_state,
- parport_sunbpp_inc_use_count,
- parport_sunbpp_dec_use_count,
- parport_ieee1284_epp_write_data,
- parport_ieee1284_epp_read_data,
- parport_ieee1284_epp_write_addr,
- parport_ieee1284_epp_read_addr,
- parport_ieee1284_ecp_write_data,
- parport_ieee1284_ecp_read_data,
- parport_ieee1284_ecp_write_addr,
- parport_ieee1284_write_compat,
- parport_ieee1284_read_nibble,
- parport_ieee1284_read_byte,
- };
- static int __init init_one_port(struct sbus_dev *sdev)
- {
- struct parport *p;
- /* at least in theory there may be a "we don't dma" case */
- struct parport_operations *ops;
- unsigned long base;
- int irq, dma, err, size;
- struct bpp_regs *regs;
- unsigned char value_tcr;
- dprintk((KERN_DEBUG "init_one_port(%p): ranges, alloc_io, ", sdev));
- irq = sdev->irqs[0];
- base = sbus_ioremap(&sdev->resource[0], 0,
- sdev->reg_addrs[0].reg_size,
- "sunbpp");
- size = sdev->reg_addrs[0].reg_size;
- dma = PARPORT_DMA_NONE;
- dprintk(("alloc(ppops), "));
- ops = kmalloc (sizeof (struct parport_operations), GFP_KERNEL);
- if (!ops) {
- sbus_iounmap(base, size);
- return 0;
- }
- memcpy (ops, &parport_sunbpp_ops, sizeof (struct parport_operations));
- dprintk(("register_portn"));
- if (!(p = parport_register_port(base, irq, dma, ops))) {
- kfree(ops);
- sbus_iounmap(base, size);
- return 0;
- }
- p->size = size;
- dprintk((KERN_DEBUG "init_one_port: request_irq(%08x:%p:%x:%s:%p) ",
- p->irq, parport_sunbpp_interrupt, SA_SHIRQ, p->name, p));
- if ((err = request_irq(p->irq, parport_sunbpp_interrupt,
- SA_SHIRQ, p->name, p)) != 0) {
- dprintk(("ERROR %dn", err));
- parport_unregister_port(p);
- kfree(ops);
- sbus_iounmap(base, size);
- return err;
- } else {
- dprintk(("OKn"));
- parport_sunbpp_enable_irq(p);
- }
- regs = (struct bpp_regs *)p->base;
- dprintk((KERN_DEBUG "forwardn"));
- value_tcr = sbus_readb(®s->p_tcr);
- value_tcr &= ~P_TCR_DIR;
- sbus_writeb(value_tcr, ®s->p_tcr);
- printk(KERN_INFO "%s: sunbpp at 0x%lxn", p->name, p->base);
- parport_proc_register(p);
- parport_announce_port (p);
- return 1;
- }
- EXPORT_NO_SYMBOLS;
- #ifdef MODULE
- int init_module(void)
- #else
- int __init parport_sunbpp_init(void)
- #endif
- {
- struct sbus_bus *sbus;
- struct sbus_dev *sdev;
- int count = 0;
- for_each_sbus(sbus) {
- for_each_sbusdev(sdev, sbus) {
- if (!strcmp(sdev->prom_name, "SUNW,bpp"))
- count += init_one_port(sdev);
- }
- }
- return count ? 0 : -ENODEV;
- }
- #ifdef MODULE
- MODULE_AUTHOR("Derrick J Brashear");
- MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port");
- MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port");
- void
- cleanup_module(void)
- {
- struct parport *p = parport_enumerate();
- while (p) {
- struct parport *next = p->next;
- if (1/*p->modes & PARPORT_MODE_PCSPP*/) {
- struct parport_operations *ops = p->ops;
- if (p->irq != PARPORT_IRQ_NONE) {
- parport_sunbpp_disable_irq(p);
- free_irq(p->irq, p);
- }
- sbus_iounmap(p->base, p->size);
- parport_proc_unregister(p);
- parport_unregister_port(p);
- kfree (ops);
- }
- p = next;
- }
- }
- #endif