Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/parport/parport_atari.c b/drivers/parport/parport_atari.c
new file mode 100644
index 0000000..78c3f34
--- /dev/null
+++ b/drivers/parport/parport_atari.c
@@ -0,0 +1,240 @@
+/* Low-level parallel port routines for the Atari builtin port
+ *
+ * Author: Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
+ *
+ * Based on parport_amiga.c.
+ *
+ * The built-in Atari parallel port provides one port at a fixed address
+ * with 8 output data lines (D0 - D7), 1 output control line (STROBE)
+ * and 1 input status line (BUSY) able to cause an interrupt.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/parport.h>
+#include <linux/interrupt.h>
+#include <asm/setup.h>
+#include <asm/atarihw.h>
+#include <asm/irq.h>
+#include <asm/atariints.h>
+
+static struct parport *this_port = NULL;
+
+static unsigned char
+parport_atari_read_data(struct parport *p)
+{
+ unsigned long flags;
+ unsigned char data;
+
+ local_irq_save(flags);
+ sound_ym.rd_data_reg_sel = 15;
+ data = sound_ym.rd_data_reg_sel;
+ local_irq_restore(flags);
+ return data;
+}
+
+static void
+parport_atari_write_data(struct parport *p, unsigned char data)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ sound_ym.rd_data_reg_sel = 15;
+ sound_ym.wd_data = data;
+ local_irq_restore(flags);
+}
+
+static unsigned char
+parport_atari_read_control(struct parport *p)
+{
+ unsigned long flags;
+ unsigned char control = 0;
+
+ local_irq_save(flags);
+ sound_ym.rd_data_reg_sel = 14;
+ if (!(sound_ym.rd_data_reg_sel & (1 << 5)))
+ control = PARPORT_CONTROL_STROBE;
+ local_irq_restore(flags);
+ return control;
+}
+
+static void
+parport_atari_write_control(struct parport *p, unsigned char control)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ sound_ym.rd_data_reg_sel = 14;
+ if (control & PARPORT_CONTROL_STROBE)
+ sound_ym.wd_data = sound_ym.rd_data_reg_sel & ~(1 << 5);
+ else
+ sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5);
+ local_irq_restore(flags);
+}
+
+static unsigned char
+parport_atari_frob_control(struct parport *p, unsigned char mask,
+ unsigned char val)
+{
+ unsigned char old = parport_atari_read_control(p);
+ parport_atari_write_control(p, (old & ~mask) ^ val);
+ return old;
+}
+
+static unsigned char
+parport_atari_read_status(struct parport *p)
+{
+ return ((mfp.par_dt_reg & 1 ? 0 : PARPORT_STATUS_BUSY) |
+ PARPORT_STATUS_SELECT | PARPORT_STATUS_ERROR);
+}
+
+static void
+parport_atari_init_state(struct pardevice *d, struct parport_state *s)
+{
+}
+
+static void
+parport_atari_save_state(struct parport *p, struct parport_state *s)
+{
+}
+
+static void
+parport_atari_restore_state(struct parport *p, struct parport_state *s)
+{
+}
+
+static irqreturn_t
+parport_atari_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ parport_generic_irq(irq, (struct parport *) dev_id, regs);
+ return IRQ_HANDLED;
+}
+
+static void
+parport_atari_enable_irq(struct parport *p)
+{
+ enable_irq(IRQ_MFP_BUSY);
+}
+
+static void
+parport_atari_disable_irq(struct parport *p)
+{
+ disable_irq(IRQ_MFP_BUSY);
+}
+
+static void
+parport_atari_data_forward(struct parport *p)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ /* Soundchip port B as output. */
+ sound_ym.rd_data_reg_sel = 7;
+ sound_ym.wd_data = sound_ym.rd_data_reg_sel | 0x40;
+ local_irq_restore(flags);
+}
+
+static void
+parport_atari_data_reverse(struct parport *p)
+{
+#if 0 /* too dangerous, can kill sound chip */
+ unsigned long flags;
+
+ local_irq_save(flags);
+ /* Soundchip port B as input. */
+ sound_ym.rd_data_reg_sel = 7;
+ sound_ym.wd_data = sound_ym.rd_data_reg_sel & ~0x40;
+ local_irq_restore(flags);
+#endif
+}
+
+static struct parport_operations parport_atari_ops = {
+ .write_data = parport_atari_write_data,
+ .read_data = parport_atari_read_data,
+
+ .write_control = parport_atari_write_control,
+ .read_control = parport_atari_read_control,
+ .frob_control = parport_atari_frob_control,
+
+ .read_status = parport_atari_read_status,
+
+ .enable_irq = parport_atari_enable_irq,
+ .disable_irq = parport_atari_disable_irq,
+
+ .data_forward = parport_atari_data_forward,
+ .data_reverse = parport_atari_data_reverse,
+
+ .init_state = parport_atari_init_state,
+ .save_state = parport_atari_save_state,
+ .restore_state = parport_atari_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 __init parport_atari_init(void)
+{
+ struct parport *p;
+ unsigned long flags;
+
+ if (MACH_IS_ATARI) {
+ local_irq_save(flags);
+ /* Soundchip port A/B as output. */
+ sound_ym.rd_data_reg_sel = 7;
+ sound_ym.wd_data = (sound_ym.rd_data_reg_sel & 0x3f) | 0xc0;
+ /* STROBE high. */
+ sound_ym.rd_data_reg_sel = 14;
+ sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5);
+ local_irq_restore(flags);
+ /* MFP port I0 as input. */
+ mfp.data_dir &= ~1;
+ /* MFP port I0 interrupt on high->low edge. */
+ mfp.active_edge &= ~1;
+ p = parport_register_port((unsigned long)&sound_ym.wd_data,
+ IRQ_MFP_BUSY, PARPORT_DMA_NONE,
+ &parport_atari_ops);
+ if (!p)
+ return -ENODEV;
+ if (request_irq(IRQ_MFP_BUSY, parport_atari_interrupt,
+ IRQ_TYPE_SLOW, p->name, p)) {
+ parport_put_port (p);
+ return -ENODEV;
+ }
+
+ this_port = p;
+ printk(KERN_INFO "%s: Atari built-in port using irq\n", p->name);
+ parport_announce_port (p);
+
+ return 0;
+ }
+ return -ENODEV;
+}
+
+static void __exit parport_atari_exit(void)
+{
+ parport_remove_port(this_port);
+ if (this_port->irq != PARPORT_IRQ_NONE)
+ free_irq(IRQ_MFP_BUSY, this_port);
+ parport_put_port(this_port);
+}
+
+MODULE_AUTHOR("Andreas Schwab");
+MODULE_DESCRIPTION("Parport Driver for Atari builtin Port");
+MODULE_SUPPORTED_DEVICE("Atari builtin Parallel Port");
+MODULE_LICENSE("GPL");
+
+module_init(parport_atari_init)
+module_exit(parport_atari_exit)