mac68k: replace mac68k SCC code with platform device
Remove the old 68k Mac serial port code and a lot of related cruft. Add
new SCC platform devices to mac 68k platform.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index ecdc19a..b5da298 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -536,10 +536,6 @@
Say Y to enable doing IP over the parallel port on your GVP
IO-Extender card, N otherwise.
-config MAC_SCC
- tristate "Macintosh serial support"
- depends on MAC
-
config MAC_HID
bool
depends on INPUT_ADBHID
@@ -595,7 +591,7 @@
config SERIAL_CONSOLE
bool "Support for serial port console"
- depends on (AMIGA || ATARI || MAC || SUN3 || SUN3X || VME || APOLLO) && (ATARI_MFPSER=y || ATARI_MIDI=y || MAC_SCC=y || AMIGA_BUILTIN_SERIAL=y || GVPIOEXT=y || MULTIFACE_III_TTY=y || SERIAL=y || MVME147_SCC || SERIAL167 || MVME162_SCC || BVME6000_SCC || DN_SERIAL)
+ depends on (AMIGA || ATARI || SUN3 || SUN3X || VME || APOLLO) && (ATARI_MFPSER=y || ATARI_MIDI=y || AMIGA_BUILTIN_SERIAL=y || GVPIOEXT=y || MULTIFACE_III_TTY=y || SERIAL=y || MVME147_SCC || SERIAL167 || MVME162_SCC || BVME6000_SCC || DN_SERIAL)
---help---
If you say Y here, it will be possible to use a serial port as the
system console (the system console is the device which receives all
diff --git a/arch/m68k/configs/mac_defconfig b/arch/m68k/configs/mac_defconfig
index 3cbbf88..c5f3232 100644
--- a/arch/m68k/configs/mac_defconfig
+++ b/arch/m68k/configs/mac_defconfig
@@ -839,9 +839,7 @@
#
# Character devices
#
-CONFIG_MAC_SCC=y
CONFIG_MAC_HID=y
-CONFIG_SERIAL_CONSOLE=y
#
# File systems
diff --git a/arch/m68k/configs/multi_defconfig b/arch/m68k/configs/multi_defconfig
index 8a23719..a8bfa3f 100644
--- a/arch/m68k/configs/multi_defconfig
+++ b/arch/m68k/configs/multi_defconfig
@@ -987,7 +987,6 @@
CONFIG_ATARI_DSP56K=m
CONFIG_AMIGA_BUILTIN_SERIAL=y
CONFIG_MULTIFACE_III_TTY=m
-CONFIG_MAC_SCC=y
CONFIG_MAC_HID=y
CONFIG_MVME147_SCC=y
CONFIG_SERIAL167=y
diff --git a/arch/m68k/include/asm/machw.h b/arch/m68k/include/asm/machw.h
index 2b4de0c..a220951 100644
--- a/arch/m68k/include/asm/machw.h
+++ b/arch/m68k/include/asm/machw.h
@@ -21,29 +21,4 @@
#define VIDEOMEMSIZE (4096*1024)
#define VIDEOMEMMASK (-4096*1024)
-#ifndef __ASSEMBLY__
-
-#include <linux/types.h>
-
-#if 0
-/*
-** SCC Z8530
-*/
-
-#define MAC_SCC_BAS (0x50F04000)
-struct MAC_SCC
- {
- u_char cha_a_ctrl;
- u_char char_dummy1;
- u_char cha_a_data;
- u_char char_dummy2;
- u_char cha_b_ctrl;
- u_char char_dummy3;
- u_char cha_b_data;
- };
-# define mac_scc ((*(volatile struct SCC*)MAC_SCC_BAS))
-#endif
-
-#endif /* __ASSEMBLY__ */
-
#endif /* linux/machw.h */
diff --git a/arch/m68k/include/asm/macints.h b/arch/m68k/include/asm/macints.h
index 679c48a..ebe1b70 100644
--- a/arch/m68k/include/asm/macints.h
+++ b/arch/m68k/include/asm/macints.h
@@ -37,7 +37,6 @@
#define VIA1_SOURCE_BASE 8
#define VIA2_SOURCE_BASE 16
-#define MAC_SCC_SOURCE_BASE 24
#define PSC3_SOURCE_BASE 24
#define PSC4_SOURCE_BASE 32
#define PSC5_SOURCE_BASE 40
@@ -96,26 +95,12 @@
#define IRQ_PSC3_2 (26)
#define IRQ_PSC3_3 (27)
-/* Level 4 (SCC) interrupts */
-#define IRQ_SCC (32)
-#define IRQ_SCCA (33)
-#define IRQ_SCCB (34)
-#if 0 /* FIXME: are there multiple interrupt conditions on the SCC ?? */
-/* SCC interrupts */
-#define IRQ_SCCB_TX (32)
-#define IRQ_SCCB_STAT (33)
-#define IRQ_SCCB_RX (34)
-#define IRQ_SCCB_SPCOND (35)
-#define IRQ_SCCA_TX (36)
-#define IRQ_SCCA_STAT (37)
-#define IRQ_SCCA_RX (38)
-#define IRQ_SCCA_SPCOND (39)
-#endif
-
/* Level 4 (PSC, AV Macs only) interrupts */
#define IRQ_PSC4_0 (32)
#define IRQ_PSC4_1 (33)
+#define IRQ_MAC_SCC_A IRQ_PSC4_1
#define IRQ_PSC4_2 (34)
+#define IRQ_MAC_SCC_B IRQ_PSC4_2
#define IRQ_PSC4_3 (35)
#define IRQ_MAC_MACE_DMA IRQ_PSC4_3
@@ -146,6 +131,9 @@
#define IRQ_BABOON_2 (66)
#define IRQ_BABOON_3 (67)
+/* On non-PSC machines, the serial ports share an IRQ */
+#define IRQ_MAC_SCC IRQ_AUTO_4
+
#define SLOT2IRQ(x) (x + 47)
#define IRQ2SLOT(x) (x - 47)
diff --git a/arch/m68k/mac/Makefile b/arch/m68k/mac/Makefile
index daebd80..b8d4c83 100644
--- a/arch/m68k/mac/Makefile
+++ b/arch/m68k/mac/Makefile
@@ -3,4 +3,4 @@
#
obj-y := config.o macints.o iop.o via.o oss.o psc.o \
- baboon.o macboing.o debug.o misc.o
+ baboon.o macboing.o misc.o
diff --git a/arch/m68k/mac/config.c b/arch/m68k/mac/config.c
index e6666a3..c8a4c39 100644
--- a/arch/m68k/mac/config.c
+++ b/arch/m68k/mac/config.c
@@ -792,6 +792,32 @@
}
};
+static struct resource scc_a_rsrcs[] = {
+ { .flags = IORESOURCE_MEM },
+ { .flags = IORESOURCE_IRQ },
+};
+
+static struct resource scc_b_rsrcs[] = {
+ { .flags = IORESOURCE_MEM },
+ { .flags = IORESOURCE_IRQ },
+};
+
+struct platform_device scc_a_pdev = {
+ .name = "scc",
+ .id = 0,
+ .num_resources = ARRAY_SIZE(scc_a_rsrcs),
+ .resource = scc_a_rsrcs,
+};
+EXPORT_SYMBOL(scc_a_pdev);
+
+struct platform_device scc_b_pdev = {
+ .name = "scc",
+ .id = 1,
+ .num_resources = ARRAY_SIZE(scc_b_rsrcs),
+ .resource = scc_b_rsrcs,
+};
+EXPORT_SYMBOL(scc_b_pdev);
+
static void __init mac_identify(void)
{
struct mac_model *m;
@@ -814,6 +840,24 @@
}
}
+ /* Set up serial port resources for the console initcall. */
+
+ scc_a_rsrcs[0].start = (resource_size_t) mac_bi_data.sccbase + 2;
+ scc_a_rsrcs[0].end = scc_a_rsrcs[0].start;
+ scc_b_rsrcs[0].start = (resource_size_t) mac_bi_data.sccbase;
+ scc_b_rsrcs[0].end = scc_b_rsrcs[0].start;
+
+ switch (macintosh_config->scc_type) {
+ case MAC_SCC_PSC:
+ scc_a_rsrcs[1].start = scc_a_rsrcs[1].end = IRQ_MAC_SCC_A;
+ scc_b_rsrcs[1].start = scc_b_rsrcs[1].end = IRQ_MAC_SCC_B;
+ break;
+ default:
+ scc_a_rsrcs[1].start = scc_a_rsrcs[1].end = IRQ_MAC_SCC;
+ scc_b_rsrcs[1].start = scc_b_rsrcs[1].end = IRQ_MAC_SCC;
+ break;
+ }
+
/*
* We need to pre-init the IOPs, if any. Otherwise
* the serial console won't work if the user had
@@ -872,6 +916,13 @@
u8 *swim_base;
/*
+ * Serial devices
+ */
+
+ platform_device_register(&scc_a_pdev);
+ platform_device_register(&scc_b_pdev);
+
+ /*
* Floppy device
*/
diff --git a/arch/m68k/mac/debug.c b/arch/m68k/mac/debug.c
deleted file mode 100644
index bce074c..0000000
--- a/arch/m68k/mac/debug.c
+++ /dev/null
@@ -1,365 +0,0 @@
-/*
- * linux/arch/m68k/mac/debug.c
- *
- * Shamelessly stolen (SCC code and general framework) from:
- *
- * linux/arch/m68k/atari/debug.c
- *
- * Atari debugging and serial console stuff
- *
- * Assembled of parts of former atari/config.c 97-12-18 by Roman Hodek
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-#include <linux/types.h>
-#include <linux/sched.h>
-#include <linux/tty.h>
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-
-#define BOOTINFO_COMPAT_1_0
-#include <asm/setup.h>
-#include <asm/bootinfo.h>
-#include <asm/macints.h>
-
-extern unsigned long mac_videobase;
-extern unsigned long mac_rowbytes;
-
-extern void mac_serial_print(const char *);
-
-#define DEBUG_HEADS
-#undef DEBUG_SCREEN
-#define DEBUG_SERIAL
-
-/*
- * These two auxiliary debug functions should go away ASAP. Only usage:
- * before the console output is up (after head.S come some other crucial
- * setup routines :-) it permits writing 'data' to the screen as bit patterns
- * (good luck reading those). Helped to figure that the bootinfo contained
- * garbage data on the amount and size of memory chunks ...
- *
- * The 'pos' argument now simply means 'linefeed after print' ...
- */
-
-#ifdef DEBUG_SCREEN
-static int peng, line;
-#endif
-
-#if 0
-
-void mac_debugging_short(int pos, short num)
-{
-#ifdef DEBUG_SCREEN
- unsigned char *pengoffset;
- unsigned char *pptr;
- int i;
-#endif
-
-#ifdef DEBUG_SERIAL
- printk("debug: %d !\n", num);
-#endif
-
-#ifdef DEBUG_SCREEN
- if (!MACH_IS_MAC) {
- /* printk("debug: %d !\n", num); */
- return;
- }
-
- /* calculate current offset */
- pengoffset = (unsigned char *)mac_videobase +
- (150+line*2) * mac_rowbytes + 80 * peng;
-
- pptr = pengoffset;
-
- for (i = 0; i < 8 * sizeof(short); i++) { /* # of bits */
- /* value mask for bit i, reverse order */
- *pptr++ = (num & (1 << (8*sizeof(short)-i-1)) ? 0xFF : 0x00);
- }
-
- peng++;
-
- if (pos) {
- line++;
- peng = 0;
- }
-#endif
-}
-
-void mac_debugging_long(int pos, long addr)
-{
-#ifdef DEBUG_SCREEN
- unsigned char *pengoffset;
- unsigned char *pptr;
- int i;
-#endif
-
-#ifdef DEBUG_SERIAL
- printk("debug: #%ld !\n", addr);
-#endif
-
-#ifdef DEBUG_SCREEN
- if (!MACH_IS_MAC) {
- /* printk("debug: #%ld !\n", addr); */
- return;
- }
-
- pengoffset=(unsigned char *)(mac_videobase+(150+line*2)*mac_rowbytes)
- +80*peng;
-
- pptr = pengoffset;
-
- for (i = 0; i < 8 * sizeof(long); i++) { /* # of bits */
- *pptr++ = (addr & (1 << (8*sizeof(long)-i-1)) ? 0xFF : 0x00);
- }
-
- peng++;
-
- if (pos) {
- line++;
- peng = 0;
- }
-#endif
-}
-
-#endif /* 0 */
-
-#ifdef DEBUG_SERIAL
-/*
- * TODO: serial debug code
- */
-
-struct mac_SCC {
- u_char cha_b_ctrl;
- u_char char_dummy1;
- u_char cha_a_ctrl;
- u_char char_dummy2;
- u_char cha_b_data;
- u_char char_dummy3;
- u_char cha_a_data;
-};
-
-# define scc (*((volatile struct mac_SCC*)mac_bi_data.sccbase))
-
-static int scc_port = -1;
-
-static struct console mac_console_driver = {
- .name = "debug",
- .flags = CON_PRINTBUFFER,
- .index = -1,
-};
-
-/*
- * Crude hack to get console output to the screen before the framebuffer
- * is initialized (happens a lot later in 2.1!).
- * We just use the console routines declared in head.S, this will interfere
- * with regular framebuffer console output and should be used exclusively
- * to debug kernel problems manifesting before framebuffer init (aka WSOD)
- *
- * To keep this hack from interfering with the regular console driver, either
- * deregister this driver before/on framebuffer console init, or silence this
- * function after the fbcon driver is running (will lose console messages!?).
- * To debug real early bugs, need to write a 'mac_register_console_hack()'
- * that is called from start_kernel() before setup_arch() and just registers
- * this driver if Mac.
- */
-
-static void mac_debug_console_write(struct console *co, const char *str,
- unsigned int count)
-{
- mac_serial_print(str);
-}
-
-
-
-/* Mac: loops_per_jiffy min. 19000 ^= .5 us; MFPDELAY was 0.6 us*/
-
-#define uSEC 1
-
-static inline void mac_sccb_out(char c)
-{
- int i;
-
- do {
- for (i = uSEC; i > 0; --i)
- barrier();
- } while (!(scc.cha_b_ctrl & 0x04)); /* wait for tx buf empty */
- for (i = uSEC; i > 0; --i)
- barrier();
- scc.cha_b_data = c;
-}
-
-static inline void mac_scca_out(char c)
-{
- int i;
-
- do {
- for (i = uSEC; i > 0; --i)
- barrier();
- } while (!(scc.cha_a_ctrl & 0x04)); /* wait for tx buf empty */
- for (i = uSEC; i > 0; --i)
- barrier();
- scc.cha_a_data = c;
-}
-
-static void mac_sccb_console_write(struct console *co, const char *str,
- unsigned int count)
-{
- while (count--) {
- if (*str == '\n')
- mac_sccb_out('\r');
- mac_sccb_out(*str++);
- }
-}
-
-static void mac_scca_console_write(struct console *co, const char *str,
- unsigned int count)
-{
- while (count--) {
- if (*str == '\n')
- mac_scca_out('\r');
- mac_scca_out(*str++);
- }
-}
-
-
-/* The following two functions do a quick'n'dirty initialization of the MFP or
- * SCC serial ports. They're used by the debugging interface, kgdb, and the
- * serial console code. */
-#define SCCB_WRITE(reg,val) \
- do { \
- int i; \
- scc.cha_b_ctrl = (reg); \
- for (i = uSEC; i > 0; --i) \
- barrier(); \
- scc.cha_b_ctrl = (val); \
- for (i = uSEC; i > 0; --i) \
- barrier(); \
- } while(0)
-
-#define SCCA_WRITE(reg,val) \
- do { \
- int i; \
- scc.cha_a_ctrl = (reg); \
- for (i = uSEC; i > 0; --i) \
- barrier(); \
- scc.cha_a_ctrl = (val); \
- for (i = uSEC; i > 0; --i) \
- barrier(); \
- } while(0)
-
-/* loops_per_jiffy isn't initialized yet, so we can't use udelay(). This does a
- * delay of ~ 60us. */
-/* Mac: loops_per_jiffy min. 19000 ^= .5 us; MFPDELAY was 0.6 us*/
-#define LONG_DELAY() \
- do { \
- int i; \
- for (i = 60*uSEC; i > 0; --i) \
- barrier(); \
- } while(0)
-
-static void __init mac_init_scc_port(int cflag, int port)
-{
- /*
- * baud rates: 1200, 1800, 2400, 4800, 9600, 19.2k, 38.4k, 57.6k, 115.2k
- */
-
- static int clksrc_table[9] =
- /* reg 11: 0x50 = BRG, 0x00 = RTxC, 0x28 = TRxC */
- { 0x50, 0x50, 0x50, 0x50, 0x50, 0x50, 0x50, 0x00, 0x00 };
- static int clkmode_table[9] =
- /* reg 4: 0x40 = x16, 0x80 = x32, 0xc0 = x64 */
- { 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0xc0, 0x80 };
- static int div_table[9] =
- /* reg12 (BRG low) */
- { 94, 62, 46, 22, 10, 4, 1, 0, 0 };
-
- int baud = cflag & CBAUD;
- int clksrc, clkmode, div, reg3, reg5;
-
- if (cflag & CBAUDEX)
- baud += B38400;
- if (baud < B1200 || baud > B38400+2)
- baud = B9600; /* use default 9600bps for non-implemented rates */
- baud -= B1200; /* tables starts at 1200bps */
-
- clksrc = clksrc_table[baud];
- clkmode = clkmode_table[baud];
- div = div_table[baud];
-
- reg3 = (((cflag & CSIZE) == CS8) ? 0xc0 : 0x40);
- reg5 = (((cflag & CSIZE) == CS8) ? 0x60 : 0x20) | 0x82 /* assert DTR/RTS */;
-
- if (port == 1) {
- (void)scc.cha_b_ctrl; /* reset reg pointer */
- SCCB_WRITE(9, 0xc0); /* reset */
- LONG_DELAY(); /* extra delay after WR9 access */
- SCCB_WRITE(4, (cflag & PARENB) ? ((cflag & PARODD) ? 0x01 : 0x03) : 0 |
- 0x04 /* 1 stopbit */ |
- clkmode);
- SCCB_WRITE(3, reg3);
- SCCB_WRITE(5, reg5);
- SCCB_WRITE(9, 0); /* no interrupts */
- LONG_DELAY(); /* extra delay after WR9 access */
- SCCB_WRITE(10, 0); /* NRZ mode */
- SCCB_WRITE(11, clksrc); /* main clock source */
- SCCB_WRITE(12, div); /* BRG value */
- SCCB_WRITE(13, 0); /* BRG high byte */
- SCCB_WRITE(14, 1);
- SCCB_WRITE(3, reg3 | 1);
- SCCB_WRITE(5, reg5 | 8);
- } else if (port == 0) {
- (void)scc.cha_a_ctrl; /* reset reg pointer */
- SCCA_WRITE(9, 0xc0); /* reset */
- LONG_DELAY(); /* extra delay after WR9 access */
- SCCA_WRITE(4, (cflag & PARENB) ? ((cflag & PARODD) ? 0x01 : 0x03) : 0 |
- 0x04 /* 1 stopbit */ |
- clkmode);
- SCCA_WRITE(3, reg3);
- SCCA_WRITE(5, reg5);
- SCCA_WRITE(9, 0); /* no interrupts */
- LONG_DELAY(); /* extra delay after WR9 access */
- SCCA_WRITE(10, 0); /* NRZ mode */
- SCCA_WRITE(11, clksrc); /* main clock source */
- SCCA_WRITE(12, div); /* BRG value */
- SCCA_WRITE(13, 0); /* BRG high byte */
- SCCA_WRITE(14, 1);
- SCCA_WRITE(3, reg3 | 1);
- SCCA_WRITE(5, reg5 | 8);
- }
-}
-#endif /* DEBUG_SERIAL */
-
-static int __init mac_debug_setup(char *arg)
-{
- if (!MACH_IS_MAC)
- return 0;
-
-#ifdef DEBUG_SERIAL
- if (!strcmp(arg, "ser") || !strcmp(arg, "ser1")) {
- /* Mac modem port */
- mac_init_scc_port(B9600|CS8, 0);
- mac_console_driver.write = mac_scca_console_write;
- scc_port = 0;
- } else if (!strcmp(arg, "ser2")) {
- /* Mac printer port */
- mac_init_scc_port(B9600|CS8, 1);
- mac_console_driver.write = mac_sccb_console_write;
- scc_port = 1;
- }
-#endif
-#ifdef DEBUG_HEADS
- if (!strcmp(arg, "scn") || !strcmp(arg, "con")) {
- /* display, using head.S console routines */
- mac_console_driver.write = mac_debug_console_write;
- }
-#endif
- if (mac_console_driver.write)
- register_console(&mac_console_driver);
- return 0;
-}
-
-early_param("debug", mac_debug_setup);
diff --git a/arch/m68k/mac/macints.c b/arch/m68k/mac/macints.c
index 2371107..900d899 100644
--- a/arch/m68k/mac/macints.c
+++ b/arch/m68k/mac/macints.c
@@ -34,9 +34,7 @@
*
* 3 - unused (?)
*
- * 4 - SCC (slot number determined by reading RR3 on the SSC itself)
- * - slot 1: SCC channel A
- * - slot 2: SCC channel B
+ * 4 - SCC
*
* 5 - unused (?)
* [serial errors or special conditions seem to raise level 6
@@ -55,8 +53,6 @@
* - slot 5: Slot $E
*
* 4 - SCC IOP
- * - slot 1: SCC channel A
- * - slot 2: SCC channel B
*
* 5 - ISM IOP (ADB?)
*
@@ -136,13 +132,8 @@
#include <asm/irq_regs.h>
#include <asm/mac_oss.h>
-#define DEBUG_SPURIOUS
#define SHUTUP_SONIC
-/* SCC interrupt mask */
-
-static int scc_mask;
-
/*
* VIA/RBV hooks
*/
@@ -191,13 +182,6 @@
extern void baboon_irq_clear(int);
/*
- * SCC interrupt routines
- */
-
-static void scc_irq_enable(unsigned int);
-static void scc_irq_disable(unsigned int);
-
-/*
* console_loglevel determines NMI handler function
*/
@@ -221,8 +205,6 @@
#ifdef DEBUG_MACINTS
printk("mac_init_IRQ(): Setting things up...\n");
#endif
- scc_mask = 0;
-
m68k_setup_irq_controller(&mac_irq_controller, IRQ_USER,
NUM_MAC_SOURCES - IRQ_USER);
/* Make sure the SONIC interrupt is cleared or things get ugly */
@@ -283,15 +265,16 @@
via_irq_enable(irq);
break;
case 3:
- case 4:
case 5:
case 6:
if (psc_present)
psc_irq_enable(irq);
else if (oss_present)
oss_irq_enable(irq);
- else if (irq_src == 4)
- scc_irq_enable(irq);
+ break;
+ case 4:
+ if (psc_present)
+ psc_irq_enable(irq);
break;
case 8:
if (baboon_present)
@@ -316,15 +299,16 @@
via_irq_disable(irq);
break;
case 3:
- case 4:
case 5:
case 6:
if (psc_present)
psc_irq_disable(irq);
else if (oss_present)
oss_irq_disable(irq);
- else if (irq_src == 4)
- scc_irq_disable(irq);
+ break;
+ case 4:
+ if (psc_present)
+ psc_irq_disable(irq);
break;
case 8:
if (baboon_present)
@@ -347,7 +331,6 @@
via_irq_clear(irq);
break;
case 3:
- case 4:
case 5:
case 6:
if (psc_present)
@@ -355,6 +338,10 @@
else if (oss_present)
oss_irq_clear(irq);
break;
+ case 4:
+ if (psc_present)
+ psc_irq_clear(irq);
+ break;
case 8:
if (baboon_present)
baboon_irq_clear(irq);
@@ -374,13 +361,17 @@
else
return via_irq_pending(irq);
case 3:
- case 4:
case 5:
case 6:
if (psc_present)
return psc_irq_pending(irq);
else if (oss_present)
return oss_irq_pending(irq);
+ break;
+ case 4:
+ if (psc_present)
+ psc_irq_pending(irq);
+ break;
}
return 0;
}
@@ -448,59 +439,3 @@
in_nmi--;
return IRQ_HANDLED;
}
-
-/*
- * Simple routines for masking and unmasking
- * SCC interrupts in cases where this can't be
- * done in hardware (only the PSC can do that.)
- */
-
-static void scc_irq_enable(unsigned int irq)
-{
- int irq_idx = IRQ_IDX(irq);
-
- scc_mask |= (1 << irq_idx);
-}
-
-static void scc_irq_disable(unsigned int irq)
-{
- int irq_idx = IRQ_IDX(irq);
-
- scc_mask &= ~(1 << irq_idx);
-}
-
-/*
- * SCC master interrupt handler. We have to do a bit of magic here
- * to figure out what channel gave us the interrupt; putting this
- * here is cleaner than hacking it into drivers/char/macserial.c.
- */
-
-void mac_scc_dispatch(int irq, void *dev_id)
-{
- volatile unsigned char *scc = (unsigned char *) mac_bi_data.sccbase + 2;
- unsigned char reg;
- unsigned long flags;
-
- /* Read RR3 from the chip. Always do this on channel A */
- /* This must be an atomic operation so disable irqs. */
-
- local_irq_save(flags);
- *scc = 3;
- reg = *scc;
- local_irq_restore(flags);
-
- /* Now dispatch. Bits 0-2 are for channel B and */
- /* bits 3-5 are for channel A. We can safely */
- /* ignore the remaining bits here. */
- /* */
- /* Note that we're ignoring scc_mask for now. */
- /* If we actually mask the ints then we tend to */
- /* get hammered by very persistent SCC irqs, */
- /* and since they're autovector interrupts they */
- /* pretty much kill the system. */
-
- if (reg & 0x38)
- m68k_handle_int(IRQ_SCCA);
- if (reg & 0x07)
- m68k_handle_int(IRQ_SCCB);
-}
diff --git a/arch/m68k/mac/oss.c b/arch/m68k/mac/oss.c
index f3d23d6..a9c0f5a 100644
--- a/arch/m68k/mac/oss.c
+++ b/arch/m68k/mac/oss.c
@@ -33,7 +33,6 @@
static irqreturn_t oss_nubus_irq(int, void *);
extern irqreturn_t via1_irq(int, void *);
-extern irqreturn_t mac_scc_dispatch(int, void *);
/*
* Initialize the OSS
@@ -69,9 +68,6 @@
if (request_irq(OSS_IRQLEV_SCSI, oss_irq, IRQ_FLG_LOCK,
"scsi", (void *) oss))
pr_err("Couldn't register %s interrupt\n", "scsi");
- if (request_irq(OSS_IRQLEV_IOPSCC, mac_scc_dispatch, IRQ_FLG_LOCK,
- "scc", mac_scc_dispatch))
- pr_err("Couldn't register %s interrupt\n", "scc");
if (request_irq(OSS_IRQLEV_NUBUS, oss_nubus_irq, IRQ_FLG_LOCK,
"nubus", (void *) oss))
pr_err("Couldn't register %s interrupt\n", "nubus");
@@ -172,9 +168,7 @@
printk("oss_irq_enable(%d)\n", irq);
#endif
switch(irq) {
- case IRQ_SCC:
- case IRQ_SCCA:
- case IRQ_SCCB:
+ case IRQ_MAC_SCC:
oss->irq_level[OSS_IOPSCC] = OSS_IRQLEV_IOPSCC;
break;
case IRQ_MAC_ADB:
@@ -212,9 +206,7 @@
printk("oss_irq_disable(%d)\n", irq);
#endif
switch(irq) {
- case IRQ_SCC:
- case IRQ_SCCA:
- case IRQ_SCCB:
+ case IRQ_MAC_SCC:
oss->irq_level[OSS_IOPSCC] = OSS_IRQLEV_DISABLED;
break;
case IRQ_MAC_ADB:
@@ -250,9 +242,7 @@
void oss_irq_clear(int irq) {
/* FIXME: how to do this on OSS? */
switch(irq) {
- case IRQ_SCC:
- case IRQ_SCCA:
- case IRQ_SCCB:
+ case IRQ_MAC_SCC:
oss->irq_pending &= ~OSS_IP_IOPSCC;
break;
case IRQ_MAC_ADB:
@@ -280,9 +270,7 @@
int oss_irq_pending(int irq)
{
switch(irq) {
- case IRQ_SCC:
- case IRQ_SCCA:
- case IRQ_SCCB:
+ case IRQ_MAC_SCC:
return oss->irq_pending & OSS_IP_IOPSCC;
break;
case IRQ_MAC_ADB:
diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c
index 11bce3c..e71166d 100644
--- a/arch/m68k/mac/via.c
+++ b/arch/m68k/mac/via.c
@@ -84,8 +84,6 @@
void via_irq_disable(int irq);
void via_irq_clear(int irq);
-extern irqreturn_t mac_scc_dispatch(int, void *);
-
/*
* Initialize the VIAs
*
@@ -311,11 +309,6 @@
if (request_irq(IRQ_AUTO_2, via2_irq, IRQ_FLG_LOCK|IRQ_FLG_FAST,
"via2", (void *) via2))
pr_err("Couldn't register %s interrupt\n", "via2");
- if (!psc_present) {
- if (request_irq(IRQ_AUTO_4, mac_scc_dispatch, IRQ_FLG_LOCK,
- "scc", mac_scc_dispatch))
- pr_err("Couldn't register %s interrupt\n", "scc");
- }
if (request_irq(IRQ_MAC_NUBUS, via_nubus_irq,
IRQ_FLG_LOCK|IRQ_FLG_FAST, "nubus", (void *) via2))
pr_err("Couldn't register %s interrupt\n", "nubus");