--- /dev/null
+/* 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)
+ goto out_unmap;
+
+ dprintk(("register_port\n"));
+ if (!(p = parport_register_port((unsigned long)base, irq, dma, ops)))
+ 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);
+
+ printk(KERN_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_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port");
+MODULE_VERSION("2.0");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff