Andreas Schwab (schwab@issan.informatik.uni-dortmund.de)
25 Jan 1999 11:03:14 +0100
Joerg Dorchain <dorchain@wirbel.com> writes:
|> The atari driver should be easily adapted. Unfortunately I lost the patch
|> for it. Can someone (Andreas?) please help out?
Here's the updated patch.
Andreas.
----------------------------------------------------------------------
--- linux/drivers/misc/Makefile.~2~ Sun Jan 24 23:32:23 1999
+++ linux/drivers/misc/Makefile Fri Jan 22 20:56:13 1999
@@ -48,6 +48,13 @@
M_OBJS += parport_mfc3.o
endif
endif
+ ifeq ($(CONFIG_PARPORT_ATARI),y)
+ LX_OBJS += parport_atari.o
+ else
+ ifeq ($(CONFIG_PARPORT_ATARI),m)
+ M_OBJS += parport_atari.o
+ endif
+ endif
LX_OBJS += parport_init.o
else
ifeq ($(CONFIG_PARPORT),m)
@@ -69,6 +76,9 @@
endif
ifeq ($(CONFIG_PARPORT_MFC3),m)
M_OBJS += parport_mfc3.o
+ endif
+ ifeq ($(CONFIG_PARPORT_ATARI),m)
+ M_OBJS += parport_atari.o
endif
endif
--- /dev/null Sun Oct 25 16:43:08 1998
+++ linux/drivers/misc/parport_atari.c Fri Jan 22 20:58:11 1999
@@ -0,0 +1,263 @@
+/* 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 <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;
+
+ save_flags(flags);
+ cli();
+ sound_ym.rd_data_reg_sel = 15;
+ data = sound_ym.rd_data_reg_sel;
+ restore_flags(flags);
+ return data;
+}
+
+static void
+parport_atari_write_data(struct parport *p, unsigned char data)
+{
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+ sound_ym.rd_data_reg_sel = 15;
+ sound_ym.wd_data = data;
+ restore_flags(flags);
+}
+
+static unsigned char
+parport_atari_read_control(struct parport *p)
+{
+ unsigned long flags;
+ unsigned char control = 0;
+
+ save_flags(flags);
+ cli();
+ sound_ym.rd_data_reg_sel = 14;
+ if (!(sound_ym.rd_data_reg_sel & (1 << 5)))
+ control = PARPORT_CONTROL_STROBE;
+ restore_flags(flags);
+ return control;
+}
+
+static void
+parport_atari_write_control(struct parport *p, unsigned char control)
+{
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+ 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);
+ restore_flags(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_write_status(struct parport *p, unsigned char status)
+{
+}
+
+static void
+parport_atari_init_state(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 void
+parport_atari_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ parport_generic_irq(irq, (struct parport *) dev_id, regs);
+}
+
+static void
+parport_atari_release_resources(struct parport *p)
+{
+ if (p->irq != PARPORT_IRQ_NONE)
+ free_irq(IRQ_MFP_BUSY, p);
+}
+
+static int
+parport_atari_claim_resources(struct parport *p)
+{
+ return request_irq(IRQ_MFP_BUSY, parport_atari_interrupt,
+ IRQ_TYPE_SLOW, p->name, p);
+}
+
+static void
+parport_atari_inc_use_count(void)
+{
+ MOD_INC_USE_COUNT;
+}
+
+static void
+parport_atari_dec_use_count(void)
+{
+ MOD_DEC_USE_COUNT;
+}
+
+static void
+parport_atari_fill_inode(struct inode *inode, int fill)
+{
+#ifdef MODULE
+ if (fill)
+ MOD_INC_USE_COUNT;
+ else
+ MOD_DEC_USE_COUNT;
+#endif
+}
+
+static struct parport_operations parport_atari_ops = {
+ parport_atari_write_data,
+ parport_atari_read_data,
+
+ parport_atari_write_control,
+ parport_atari_read_control,
+ parport_atari_frob_control,
+
+ NULL, /* write_econtrol */
+ NULL, /* read_econtrol */
+ NULL, /* frob_econtrol */
+
+ parport_atari_write_status,
+ parport_atari_read_status,
+
+ NULL, /* write fifo */
+ NULL, /* read fifo */
+
+ NULL, /* change_mode */
+
+ parport_atari_release_resources,
+ parport_atari_claim_resources,
+
+ NULL, /* epp_write_data */
+ NULL, /* epp_read_data */
+ NULL, /* epp_write_addr */
+ NULL, /* epp_read_addr */
+ NULL, /* epp_check_timeout */
+
+ NULL, /* epp_write_block */
+ NULL, /* epp_read_block */
+
+ NULL, /* ecp_write_block */
+ NULL, /* ecp_read_block */
+
+ parport_atari_init_state,
+ parport_atari_save_state,
+ parport_atari_restore_state,
+
+ NULL, /* enable_irq */
+ NULL, /* disable_irq */
+ parport_atari_interrupt,
+
+ parport_atari_inc_use_count,
+ parport_atari_dec_use_count,
+ parport_atari_fill_inode
+};
+
+
+int __init
+parport_atari_init(void)
+{
+ struct parport *p;
+ unsigned long flags;
+
+ if (MACH_IS_ATARI) {
+ save_flags(flags);
+ cli();
+ /* 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);
+ restore_flags(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 0;
+ this_port = p;
+ printk(KERN_INFO "%s: Atari built-in port using irq\n", p->name);
+ parport_proc_register(p);
+ p->flags |= PARPORT_FLAG_COMA;
+
+ if (parport_probe_hook)
+ (*parport_probe_hook)(p);
+ return 1;
+ }
+ return 0;
+}
+
+#ifdef MODULE
+
+MODULE_AUTHOR("Andreas Schwab");
+MODULE_DESCRIPTION("Parport Driver for Atari builtin Port");
+MODULE_SUPPORTED_DEVICE("Atari builtin Parallel Port");
+
+int
+init_module(void)
+{
+ return parport_atari_init() ? 0 : -ENODEV;
+}
+
+void
+cleanup_module(void)
+{
+ if (!(this_port->flags & PARPORT_FLAG_COMA))
+ parport_quiesce(this_port);
+ parport_proc_unregister(this_port);
+ parport_unregister_port(this_port);
+}
+#endif
--- linux/drivers/misc/parport_init.c.~2~ Sun Jan 24 23:33:33 1999
+++ linux/drivers/misc/parport_init.c Fri Jan 22 20:54:25 1999
@@ -132,6 +132,9 @@
#ifdef CONFIG_PARPORT_MFC3
parport_mfc3_init();
#endif
+#ifdef CONFIG_PARPORT_ATARI
+ parport_atari_init();
+#endif
return 0;
}
#endif
--- linux/include/linux/parport.h.~2~ Sun Jan 24 23:32:46 1999
+++ linux/include/linux/parport.h Fri Jan 22 20:59:38 1999
@@ -93,6 +93,7 @@
/* ARC has no state. */
/* AX uses same state information as PC */
struct amiga_parport_state amiga;
+ /* Atari has not state. */
void *misc;
} u;
};
-- Andreas Schwab "And now for something schwab@issan.cs.uni-dortmund.de completely different" schwab@gnu.org-- To unsubscribe, send mail to: linux-parport-request@torque.net -- -- with the single word "unsubscribe" in the body of the message. --
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