diff options
Diffstat (limited to 'drivers/parport/parport_sunbpp.c')
| -rw-r--r-- | drivers/parport/parport_sunbpp.c | 381 |
1 files changed, 381 insertions, 0 deletions
diff --git a/drivers/parport/parport_sunbpp.c b/drivers/parport/parport_sunbpp.c new file mode 100644 index 000000000..865fc41db --- /dev/null +++ b/drivers/parport/parport_sunbpp.c @@ -0,0 +1,381 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* parport_sunbpp.c: Parallel-port routines for SBUS + * + * Author: Derrick J. Brashear <shadow@dementia.org> + * + * based on work by: + * Phil Blundell <philb@gnu.org> + * 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 + * + * Updated to new SBUS device framework: David S. Miller <davem@davemloft.net> + * + */ + +#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/of.h> +#include <linux/of_device.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/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_disable_irq(struct parport *p) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)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 __iomem *regs = (struct bpp_regs __iomem *)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 __iomem *regs = (struct bpp_regs __iomem *)p->base; + + sbus_writeb(d, ®s->p_dr); + dprintk((KERN_DEBUG "wrote 0x%x\n", d)); +} + +static unsigned char parport_sunbpp_read_data(struct parport *p) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; + + return sbus_readb(®s->p_dr); +} + +static unsigned char status_sunbpp_to_pc(struct parport *p) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)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%x\n", value_tcr, value_ir)); + dprintk((KERN_DEBUG "read status 0x%x\n", bits)); + return bits; +} + +static unsigned char control_sunbpp_to_pc(struct parport *p) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)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%x\n", value_tcr, value_or)); + dprintk((KERN_DEBUG "read control 0x%x\n", 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 __iomem *regs = (struct bpp_regs __iomem *)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%x\n", + value_tcr, value_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%x\n", + value_tcr, value_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 __iomem *regs = (struct bpp_regs __iomem *)p->base; + unsigned char value_tcr = sbus_readb(®s->p_tcr); + + dprintk((KERN_DEBUG "forward\n")); + value_tcr &= ~P_TCR_DIR; + sbus_writeb(value_tcr, ®s->p_tcr); +} + +static void parport_sunbpp_data_reverse (struct parport *p) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; + u8 val = sbus_readb(®s->p_tcr); + + dprintk((KERN_DEBUG "reverse\n")); + 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 struct parport_operations parport_sunbpp_ops = +{ + .write_data = parport_sunbpp_write_data, + .read_data = parport_sunbpp_read_data, + + .write_control = parport_sunbpp_write_control, + .read_control = parport_sunbpp_read_control, + .frob_control = parport_sunbpp_frob_control, + + .read_status = parport_sunbpp_read_status, + + .enable_irq = parport_sunbpp_enable_irq, + .disable_irq = parport_sunbpp_disable_irq, + + .data_forward = parport_sunbpp_data_forward, + .data_reverse = parport_sunbpp_data_reverse, + + .init_state = parport_sunbpp_init_state, + .save_state = parport_sunbpp_save_state, + .restore_state = parport_sunbpp_restore_state, + + .epp_write_data = parport_ieee1284_epp_write_data, + .epp_read_data = parport_ieee1284_epp_read_data, + .epp_write_addr = parport_ieee1284_epp_write_addr, + .epp_read_addr = parport_ieee1284_epp_read_addr, + + .ecp_write_data = parport_ieee1284_ecp_write_data, + .ecp_read_data = parport_ieee1284_ecp_read_data, + .ecp_write_addr = parport_ieee1284_ecp_write_addr, + + .compat_write_data = parport_ieee1284_write_compat, + .nibble_read_data = parport_ieee1284_read_nibble, + .byte_read_data = parport_ieee1284_read_byte, + + .owner = THIS_MODULE, +}; + +static int bpp_probe(struct platform_device *op) +{ + struct parport_operations *ops; + struct bpp_regs __iomem *regs; + int irq, dma, err = 0, size; + unsigned char value_tcr; + void __iomem *base; + struct parport *p; + + irq = op->archdata.irqs[0]; + base = of_ioremap(&op->resource[0], 0, + resource_size(&op->resource[0]), + "sunbpp"); + if (!base) + return -ENODEV; + + size = resource_size(&op->resource[0]); + dma = PARPORT_DMA_NONE; + + ops = kmemdup(&parport_sunbpp_ops, sizeof(struct parport_operations), + GFP_KERNEL); + if (!ops) { + err = -ENOMEM; + goto out_unmap; + } + + dprintk(("register_port\n")); + if (!(p = parport_register_port((unsigned long)base, irq, dma, ops))) { + err = -ENOMEM; + goto out_free_ops; + } + + p->size = size; + p->dev = &op->dev; + + if ((err = request_irq(p->irq, parport_irq_handler, + IRQF_SHARED, p->name, p)) != 0) { + goto out_put_port; + } + + parport_sunbpp_enable_irq(p); + + regs = (struct bpp_regs __iomem *)p->base; + + value_tcr = sbus_readb(®s->p_tcr); + value_tcr &= ~P_TCR_DIR; + sbus_writeb(value_tcr, ®s->p_tcr); + + pr_info("%s: sunbpp at 0x%lx\n", p->name, p->base); + + dev_set_drvdata(&op->dev, p); + + parport_announce_port(p); + + return 0; + +out_put_port: + parport_put_port(p); + +out_free_ops: + kfree(ops); + +out_unmap: + of_iounmap(&op->resource[0], base, size); + + return err; +} + +static int bpp_remove(struct platform_device *op) +{ + struct parport *p = dev_get_drvdata(&op->dev); + struct parport_operations *ops = p->ops; + + parport_remove_port(p); + + if (p->irq != PARPORT_IRQ_NONE) { + parport_sunbpp_disable_irq(p); + free_irq(p->irq, p); + } + + of_iounmap(&op->resource[0], (void __iomem *) p->base, p->size); + parport_put_port(p); + kfree(ops); + + dev_set_drvdata(&op->dev, NULL); + + return 0; +} + +static const struct of_device_id bpp_match[] = { + { + .name = "SUNW,bpp", + }, + {}, +}; + +MODULE_DEVICE_TABLE(of, bpp_match); + +static struct platform_driver bpp_sbus_driver = { + .driver = { + .name = "bpp", + .of_match_table = bpp_match, + }, + .probe = bpp_probe, + .remove = bpp_remove, +}; + +module_platform_driver(bpp_sbus_driver); + +MODULE_AUTHOR("Derrick J Brashear"); +MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port"); +MODULE_VERSION("2.0"); +MODULE_LICENSE("GPL"); |