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Commit f74faec6 authored by Finn Thain's avatar Finn Thain Committed by Michael Ellerman
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m68k/mac: Replace via-maciisi driver with via-cuda driver 

Change the device probe test in the via-cuda.c driver so it will load on
Egret-based machines too. Remove the now redundant via-maciisi.c driver.
Tested-by: default avatarStan Johnson <userm57@yahoo.com>
Signed-off-by: default avatarFinn Thain <fthain@telegraphics.com.au>
Acked-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent d23eee88
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Showing with 30 additions and 776 deletions
arch/m68k/include/asm/macintosh.h
View file @ f74faec6
......@@ -38,7 +38,7 @@ struct mac_model
#define MAC_ADB_NONE 0
#define MAC_ADB_II 1
#define MAC_ADB_IISI 2
#define MAC_ADB_EGRET 2
#define MAC_ADB_CUDA 3
#define MAC_ADB_PB1 4
#define MAC_ADB_PB2 5
......
arch/m68k/mac/config.c
View file @ f74faec6
......@@ -286,7 +286,7 @@ static struct mac_model mac_data_table[] = {
}, {
.ident = MAC_MODEL_IISI,
.name = "IIsi",
.adb_type = MAC_ADB_IISI,
.adb_type = MAC_ADB_EGRET,
.via_type = MAC_VIA_IICI,
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_II,
......@@ -295,7 +295,7 @@ static struct mac_model mac_data_table[] = {
}, {
.ident = MAC_MODEL_IIVI,
.name = "IIvi",
.adb_type = MAC_ADB_IISI,
.adb_type = MAC_ADB_EGRET,
.via_type = MAC_VIA_IICI,
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
......@@ -304,7 +304,7 @@ static struct mac_model mac_data_table[] = {
}, {
.ident = MAC_MODEL_IIVX,
.name = "IIvx",
.adb_type = MAC_ADB_IISI,
.adb_type = MAC_ADB_EGRET,
.via_type = MAC_VIA_IICI,
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
......@@ -319,7 +319,7 @@ static struct mac_model mac_data_table[] = {
{
.ident = MAC_MODEL_CLII,
.name = "Classic II",
.adb_type = MAC_ADB_IISI,
.adb_type = MAC_ADB_EGRET,
.via_type = MAC_VIA_IICI,
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
......@@ -352,7 +352,7 @@ static struct mac_model mac_data_table[] = {
{
.ident = MAC_MODEL_LC,
.name = "LC",
.adb_type = MAC_ADB_IISI,
.adb_type = MAC_ADB_EGRET,
.via_type = MAC_VIA_IICI,
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
......@@ -361,7 +361,7 @@ static struct mac_model mac_data_table[] = {
}, {
.ident = MAC_MODEL_LCII,
.name = "LC II",
.adb_type = MAC_ADB_IISI,
.adb_type = MAC_ADB_EGRET,
.via_type = MAC_VIA_IICI,
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
......@@ -370,7 +370,7 @@ static struct mac_model mac_data_table[] = {
}, {
.ident = MAC_MODEL_LCIII,
.name = "LC III",
.adb_type = MAC_ADB_IISI,
.adb_type = MAC_ADB_EGRET,
.via_type = MAC_VIA_IICI,
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
......@@ -498,7 +498,7 @@ static struct mac_model mac_data_table[] = {
{
.ident = MAC_MODEL_P460,
.name = "Performa 460",
.adb_type = MAC_ADB_IISI,
.adb_type = MAC_ADB_EGRET,
.via_type = MAC_VIA_IICI,
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
......@@ -575,7 +575,7 @@ static struct mac_model mac_data_table[] = {
}, {
.ident = MAC_MODEL_P600,
.name = "Performa 600",
.adb_type = MAC_ADB_IISI,
.adb_type = MAC_ADB_EGRET,
.via_type = MAC_VIA_IICI,
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
......
arch/m68k/mac/misc.c
View file @ f74faec6
......@@ -142,54 +142,6 @@ static void pmu_write_pram(int offset, __u8 data)
#define pmu_write_pram NULL
#endif
#if 0 /* def CONFIG_ADB_MACIISI */
extern int maciisi_request(struct adb_request *req,
void (*done)(struct adb_request *), int nbytes, ...);
static long maciisi_read_time(void)
{
struct adb_request req;
long time;
if (maciisi_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME))
return 0;
time = (req.reply[3] << 24) | (req.reply[4] << 16)
| (req.reply[5] << 8) | req.reply[6];
return time - RTC_OFFSET;
}
static void maciisi_write_time(long data)
{
struct adb_request req;
data += RTC_OFFSET;
maciisi_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
(data >> 24) & 0xFF, (data >> 16) & 0xFF,
(data >> 8) & 0xFF, data & 0xFF);
}
static __u8 maciisi_read_pram(int offset)
{
struct adb_request req;
if (maciisi_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
(offset >> 8) & 0xFF, offset & 0xFF))
return 0;
return req.reply[3];
}
static void maciisi_write_pram(int offset, __u8 data)
{
struct adb_request req;
maciisi_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
(offset >> 8) & 0xFF, offset & 0xFF, data);
}
#else
#define maciisi_read_time() 0
#define maciisi_write_time(n)
#define maciisi_read_pram NULL
#define maciisi_write_pram NULL
#endif
/*
* VIA PRAM/RTC access routines
*
......@@ -458,11 +410,10 @@ void mac_pram_read(int offset, __u8 *buffer, int len)
int i;
switch(macintosh_config->adb_type) {
case MAC_ADB_IISI:
func = maciisi_read_pram; break;
case MAC_ADB_PB1:
case MAC_ADB_PB2:
func = pmu_read_pram; break;
case MAC_ADB_EGRET:
case MAC_ADB_CUDA:
func = cuda_read_pram; break;
default:
......@@ -481,11 +432,10 @@ void mac_pram_write(int offset, __u8 *buffer, int len)
int i;
switch(macintosh_config->adb_type) {
case MAC_ADB_IISI:
func = maciisi_write_pram; break;
case MAC_ADB_PB1:
case MAC_ADB_PB2:
func = pmu_write_pram; break;
case MAC_ADB_EGRET:
case MAC_ADB_CUDA:
func = cuda_write_pram; break;
default:
......@@ -500,17 +450,13 @@ void mac_pram_write(int offset, __u8 *buffer, int len)
void mac_poweroff(void)
{
/*
* MAC_ADB_IISI may need to be moved up here if it doesn't actually
* work using the ADB packet method. --David Kilzer
*/
if (oss_present) {
oss_shutdown();
} else if (macintosh_config->adb_type == MAC_ADB_II) {
via_shutdown();
#ifdef CONFIG_ADB_CUDA
} else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
} else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
macintosh_config->adb_type == MAC_ADB_CUDA) {
cuda_shutdown();
#endif
#ifdef CONFIG_ADB_PMU68K
......@@ -550,7 +496,8 @@ void mac_reset(void)
local_irq_restore(flags);
}
#ifdef CONFIG_ADB_CUDA
} else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
} else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
macintosh_config->adb_type == MAC_ADB_CUDA) {
cuda_restart();
#endif
#ifdef CONFIG_ADB_PMU68K
......@@ -699,13 +646,11 @@ int mac_hwclk(int op, struct rtc_time *t)
case MAC_ADB_IOP:
now = via_read_time();
break;
case MAC_ADB_IISI:
now = maciisi_read_time();
break;
case MAC_ADB_PB1:
case MAC_ADB_PB2:
now = pmu_read_time();
break;
case MAC_ADB_EGRET:
case MAC_ADB_CUDA:
now = cuda_read_time();
break;
......@@ -737,6 +682,7 @@ int mac_hwclk(int op, struct rtc_time *t)
case MAC_ADB_IOP:
via_write_time(now);
break;
case MAC_ADB_EGRET:
case MAC_ADB_CUDA:
cuda_write_time(now);
break;
......@@ -744,8 +690,6 @@ int mac_hwclk(int op, struct rtc_time *t)
case MAC_ADB_PB2:
pmu_write_time(now);
break;
case MAC_ADB_IISI:
maciisi_write_time(now);
}
}
return 0;
......
drivers/macintosh/Kconfig
View file @ f74faec6
......@@ -30,14 +30,6 @@ config ADB_MACII
Quadra 610, Quadra 650, Quadra 700, Quadra 800, Centris 610 and
Centris 650.
config ADB_MACIISI
bool "Include Mac IIsi ADB driver"
depends on ADB && MAC && BROKEN
help
Say Y here if want your kernel to support Macintosh systems that use
the Mac IIsi style ADB. This includes the IIsi, IIvi, IIvx, Classic
II, LC, LC II, LC III, Performa 460, and the Performa 600.
config ADB_IOP
bool "Include IOP (IIfx/Quadra 9x0) ADB driver"
depends on ADB && MAC
......@@ -60,17 +52,15 @@ config ADB_PMU68K
# we want to change this to something like CONFIG_SYSCTRL_CUDA/PMU
config ADB_CUDA
bool "Support for CUDA based Macs and PowerMacs"
bool "Support for Cuda/Egret based Macs and PowerMacs"
depends on (ADB || PPC_PMAC) && !PPC_PMAC64
help
This provides support for CUDA based Macintosh and Power Macintosh
systems. This includes many m68k based Macs (Color Classic, Mac TV,
Performa 475, Performa 520, Performa 550, Performa 575,
Performa 588, Quadra 605, Quadra 630, Quadra/Centris 660AV, and
Quadra 840AV), most OldWorld PowerMacs, the first generation iMacs,
the Blue&White G3 and the "Yikes" G4 (PCI Graphics). All later
models should use CONFIG_ADB_PMU instead. It is safe to say Y here
even if your machine doesn't have a CUDA.
This provides support for Cuda/Egret based Macintosh and
Power Macintosh systems. This includes most m68k based Macs,
most Old World PowerMacs, the first generation iMacs, the
Blue & White G3 and the "Yikes" G4 (PCI Graphics). All later
models should use CONFIG_ADB_PMU instead. It is safe to say Y
here even if your machine doesn't have a Cuda or Egret device.
If unsure say Y.
......
drivers/macintosh/Makefile
View file @ f74faec6
......@@ -20,7 +20,6 @@ obj-$(CONFIG_PMAC_SMU) += smu.o
obj-$(CONFIG_ADB) += adb.o
obj-$(CONFIG_ADB_MACII) += via-macii.o
obj-$(CONFIG_ADB_MACIISI) += via-maciisi.o
obj-$(CONFIG_ADB_IOP) += adb-iop.o
obj-$(CONFIG_ADB_PMU68K) += via-pmu68k.o
obj-$(CONFIG_ADB_MACIO) += macio-adb.o
......
drivers/macintosh/adb.c
View file @ f74faec6
......@@ -48,7 +48,6 @@
EXPORT_SYMBOL(adb_client_list);
extern struct adb_driver via_macii_driver;
extern struct adb_driver via_maciisi_driver;
extern struct adb_driver via_cuda_driver;
extern struct adb_driver adb_iop_driver;
extern struct adb_driver via_pmu_driver;
......@@ -59,9 +58,6 @@ static struct adb_driver *adb_driver_list[] = {
#ifdef CONFIG_ADB_MACII
&via_macii_driver,
#endif
#ifdef CONFIG_ADB_MACIISI
&via_maciisi_driver,
#endif
#ifdef CONFIG_ADB_CUDA
&via_cuda_driver,
#endif
......
drivers/macintosh/via-cuda.c
View file @ f74faec6
......@@ -205,12 +205,13 @@ int __init find_via_cuda(void)
struct adb_request req;
int err;
if (macintosh_config->adb_type != MAC_ADB_CUDA)
if (macintosh_config->adb_type != MAC_ADB_CUDA &&
macintosh_config->adb_type != MAC_ADB_EGRET)
return 0;
via = via1;
cuda_state = idle;
mcu_is_egret = false;
mcu_is_egret = macintosh_config->adb_type == MAC_ADB_EGRET;
err = cuda_init_via();
if (err) {
......@@ -323,7 +324,8 @@ cuda_probe(void)
if (sys_ctrler != SYS_CTRLER_CUDA)
return -ENODEV;
#else
if (macintosh_config->adb_type != MAC_ADB_CUDA)
if (macintosh_config->adb_type != MAC_ADB_CUDA &&
macintosh_config->adb_type != MAC_ADB_EGRET)
return -ENODEV;
#endif
if (via == NULL)
......
drivers/macintosh/via-maciisi.c deleted 100644 → 0
View file @ d23eee88
/*
* Device driver for the IIsi-style ADB on some Mac LC and II-class machines
*
* Based on via-cuda.c and via-macii.c, as well as the original
* adb-bus.c, which in turn is somewhat influenced by (but uses no
* code from) the NetBSD HWDIRECT ADB code. Original IIsi driver work
* was done by Robert Thompson and integrated into the old style
* driver by Michael Schmitz.
*
* Original sources (c) Alan Cox, Paul Mackerras, and others.
*
* Rewritten for Unified ADB by David Huggins-Daines <dhd@debian.org>
*
* 7/13/2000- extensive changes by Andrew McPherson <andrew@macduff.dhs.org>
* Works about 30% of the time now.
*/
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/adb.h>
#include <linux/cuda.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <asm/macintosh.h>
#include <asm/macints.h>
#include <asm/mac_via.h>
static volatile unsigned char *via;
/* VIA registers - spaced 0x200 bytes apart - only the ones we actually use */
#define RS 0x200 /* skip between registers */
#define B 0 /* B-side data */
#define A RS /* A-side data */
#define DIRB (2*RS) /* B-side direction (1=output) */
#define DIRA (3*RS) /* A-side direction (1=output) */
#define SR (10*RS) /* Shift register */
#define ACR (11*RS) /* Auxiliary control register */
#define IFR (13*RS) /* Interrupt flag register */
#define IER (14*RS) /* Interrupt enable register */
/* Bits in B data register: all active low */
#define TREQ 0x08 /* Transfer request (input) */
#define TACK 0x10 /* Transfer acknowledge (output) */
#define TIP 0x20 /* Transfer in progress (output) */
#define ST_MASK 0x30 /* mask for selecting ADB state bits */
/* Bits in ACR */
#define SR_CTRL 0x1c /* Shift register control bits */
#define SR_EXT 0x0c /* Shift on external clock */
#define SR_OUT 0x10 /* Shift out if 1 */
/* Bits in IFR and IER */
#define IER_SET 0x80 /* set bits in IER */
#define IER_CLR 0 /* clear bits in IER */
#define SR_INT 0x04 /* Shift register full/empty */
#define SR_DATA 0x08 /* Shift register data */
#define SR_CLOCK 0x10 /* Shift register clock */
#define ADB_DELAY 150
#undef DEBUG_MACIISI_ADB
static struct adb_request* current_req;
static struct adb_request* last_req;
static unsigned char maciisi_rbuf[16];
static unsigned char *reply_ptr;
static int data_index;
static int reading_reply;
static int reply_len;
static int tmp;
static int need_sync;
static enum maciisi_state {
idle,
sending,
reading,
} maciisi_state;
static int maciisi_probe(void);
static int maciisi_init(void);
static int maciisi_send_request(struct adb_request* req, int sync);
static void maciisi_sync(struct adb_request *req);
static int maciisi_write(struct adb_request* req);
static irqreturn_t maciisi_interrupt(int irq, void* arg);
static void maciisi_input(unsigned char *buf, int nb);
static int maciisi_init_via(void);
static void maciisi_poll(void);
static int maciisi_start(void);
struct adb_driver via_maciisi_driver = {
"Mac IIsi",
maciisi_probe,
maciisi_init,
maciisi_send_request,
NULL, /* maciisi_adb_autopoll, */
maciisi_poll,
NULL /* maciisi_reset_adb_bus */
};
static int
maciisi_probe(void)
{
if (macintosh_config->adb_type != MAC_ADB_IISI)
return -ENODEV;
via = via1;
return 0;
}
static int
maciisi_init(void)
{
int err;
if (via == NULL)
return -ENODEV;
if ((err = maciisi_init_via())) {
printk(KERN_ERR "maciisi_init: maciisi_init_via() failed, code %d\n", err);
via = NULL;
return err;
}
if (request_irq(IRQ_MAC_ADB, maciisi_interrupt, 0, "ADB",
maciisi_interrupt)) {
printk(KERN_ERR "maciisi_init: can't get irq %d\n", IRQ_MAC_ADB);
return -EAGAIN;
}
printk("adb: Mac IIsi driver v0.2 for Unified ADB.\n");
return 0;
}
/* Flush data from the ADB controller */
static void
maciisi_stfu(void)
{
int status = via[B] & (TIP|TREQ);
if (status & TREQ) {
#ifdef DEBUG_MACIISI_ADB
printk (KERN_DEBUG "maciisi_stfu called with TREQ high!\n");
#endif
return;
}
udelay(ADB_DELAY);
via[ACR] &= ~SR_OUT;
via[IER] = IER_CLR | SR_INT;
udelay(ADB_DELAY);
status = via[B] & (TIP|TREQ);
if (!(status & TREQ))
{
via[B] |= TIP;
while(1)
{
int poll_timeout = ADB_DELAY * 5;
/* Poll for SR interrupt */
while (!(via[IFR] & SR_INT) && poll_timeout-- > 0)
status = via[B] & (TIP|TREQ);
tmp = via[SR]; /* Clear shift register */
#ifdef DEBUG_MACIISI_ADB
printk(KERN_DEBUG "maciisi_stfu: status %x timeout %d data %x\n",
status, poll_timeout, tmp);
#endif
if(via[B] & TREQ)
break;
/* ACK on-off */
via[B] |= TACK;
udelay(ADB_DELAY);
via[B] &= ~TACK;
}
/* end frame */
via[B] &= ~TIP;
udelay(ADB_DELAY);
}
via[IER] = IER_SET | SR_INT;
}
/* All specifically VIA-related initialization goes here */
static int
maciisi_init_via(void)
{
int i;
/* Set the lines up. We want TREQ as input TACK|TIP as output */
via[DIRB] = (via[DIRB] | TACK | TIP) & ~TREQ;
/* Shift register on input */
via[ACR] = (via[ACR] & ~SR_CTRL) | SR_EXT;
#ifdef DEBUG_MACIISI_ADB
printk(KERN_DEBUG "maciisi_init_via: initial status %x\n", via[B] & (TIP|TREQ));
#endif
/* Wipe any pending data and int */
tmp = via[SR];
/* Enable keyboard interrupts */
via[IER] = IER_SET | SR_INT;
/* Set initial state: idle */
via[B] &= ~(TACK|TIP);
/* Clear interrupt bit */
via[IFR] = SR_INT;
for(i = 0; i < 60; i++) {
udelay(ADB_DELAY);
maciisi_stfu();
udelay(ADB_DELAY);
if(via[B] & TREQ)
break;
}
if (i == 60)
printk(KERN_ERR "maciisi_init_via: bus jam?\n");
maciisi_state = idle;
need_sync = 0;
return 0;
}
/* Send a request, possibly waiting for a reply */
static int
maciisi_send_request(struct adb_request* req, int sync)
{
int i;
#ifdef DEBUG_MACIISI_ADB
static int dump_packet = 0;
#endif
if (via == NULL) {
req->complete = 1;
return -ENXIO;
}
#ifdef DEBUG_MACIISI_ADB
if (dump_packet) {
printk(KERN_DEBUG "maciisi_send_request:");
for (i = 0; i < req->nbytes; i++) {
printk(" %.2x", req->data[i]);
}
printk(" sync %d\n", sync);
}
#endif
req->reply_expected = 1;
i = maciisi_write(req);
if (i)
{
/* Normally, if a packet requires syncing, that happens at the end of
* maciisi_send_request. But if the transfer fails, it will be restarted
* by maciisi_interrupt(). We use need_sync to tell maciisi_interrupt
* when to sync a packet that it sends out.
*
* Suggestions on a better way to do this are welcome.
*/
if(i == -EBUSY && sync)
need_sync = 1;
else
need_sync = 0;
return i;
}
if(sync)
maciisi_sync(req);
return 0;
}
/* Poll the ADB chip until the request completes */
static void maciisi_sync(struct adb_request *req)
{
int count = 0;
#ifdef DEBUG_MACIISI_ADB
printk(KERN_DEBUG "maciisi_sync called\n");
#endif
/* If for some reason the ADB chip shuts up on us, we want to avoid an endless loop. */
while (!req->complete && count++ < 50) {
maciisi_poll();
}
/* This could be BAD... when the ADB controller doesn't respond
* for this long, it's probably not coming back :-( */
if (count > 50) /* Hopefully shouldn't happen */
printk(KERN_ERR "maciisi_send_request: poll timed out!\n");
}
int
maciisi_request(struct adb_request *req, void (*done)(struct adb_request *),
int nbytes, ...)
{
va_list list;
int i;
req->nbytes = nbytes;
req->done = done;
req->reply_expected = 0;
va_start(list, nbytes);
for (i = 0; i < nbytes; i++)
req->data[i++] = va_arg(list, int);
va_end(list);
return maciisi_send_request(req, 1);
}
/* Enqueue a request, and run the queue if possible */
static int
maciisi_write(struct adb_request* req)
{
unsigned long flags;
int i;
/* We will accept CUDA packets - the VIA sends them to us, so
it figures that we should be able to send them to it */
if (req->nbytes < 2 || req->data[0] > CUDA_PACKET) {
printk(KERN_ERR "maciisi_write: packet too small or not an ADB or CUDA packet\n");
req->complete = 1;
return -EINVAL;
}
req->next = NULL;
req->sent = 0;
req->complete = 0;
req->reply_len = 0;
local_irq_save(flags);
if (current_req) {
last_req->next = req;
last_req = req;
} else {
current_req = req;
last_req = req;
}
if (maciisi_state == idle)
{
i = maciisi_start();
if(i != 0)
{
local_irq_restore(flags);
return i;
}
}
else
{
#ifdef DEBUG_MACIISI_ADB
printk(KERN_DEBUG "maciisi_write: would start, but state is %d\n", maciisi_state);
#endif
local_irq_restore(flags);
return -EBUSY;
}
local_irq_restore(flags);
return 0;
}
static int
maciisi_start(void)
{
struct adb_request* req;
int status;
#ifdef DEBUG_MACIISI_ADB
status = via[B] & (TIP | TREQ);
printk(KERN_DEBUG "maciisi_start called, state=%d, status=%x, ifr=%x\n", maciisi_state, status, via[IFR]);
#endif
if (maciisi_state != idle) {
/* shouldn't happen */
printk(KERN_ERR "maciisi_start: maciisi_start called when driver busy!\n");
return -EBUSY;
}
req = current_req;
if (req == NULL)
return -EINVAL;
status = via[B] & (TIP|TREQ);
if (!(status & TREQ)) {
#ifdef DEBUG_MACIISI_ADB
printk(KERN_DEBUG "maciisi_start: bus busy - aborting\n");
#endif
return -EBUSY;
}
/* Okay, send */
#ifdef DEBUG_MACIISI_ADB
printk(KERN_DEBUG "maciisi_start: sending\n");
#endif
/* Set state to active */
via[B] |= TIP;
/* ACK off */
via[B] &= ~TACK;
/* Delay */
udelay(ADB_DELAY);
/* Shift out and send */
via[ACR] |= SR_OUT;
via[SR] = req->data[0];
data_index = 1;
/* ACK on */
via[B] |= TACK;
maciisi_state = sending;
return 0;
}
void
maciisi_poll(void)
{
unsigned long flags;
local_irq_save(flags);
if (via[IFR] & SR_INT) {
maciisi_interrupt(0, NULL);
}
else /* avoid calling this function too quickly in a loop */
udelay(ADB_DELAY);
local_irq_restore(flags);
}
/* Shift register interrupt - this is *supposed* to mean that the
register is either full or empty. In practice, I have no idea what
it means :( */
static irqreturn_t
maciisi_interrupt(int irq, void* arg)
{
int status;
struct adb_request *req;
#ifdef DEBUG_MACIISI_ADB
static int dump_reply = 0;
#endif
int i;
unsigned long flags;
local_irq_save(flags);
status = via[B] & (TIP|TREQ);
#ifdef DEBUG_MACIISI_ADB
printk(KERN_DEBUG "state %d status %x ifr %x\n", maciisi_state, status, via[IFR]);
#endif
if (!(via[IFR] & SR_INT)) {
/* Shouldn't happen, we hope */
printk(KERN_ERR "maciisi_interrupt: called without interrupt flag set\n");
local_irq_restore(flags);
return IRQ_NONE;
}
/* Clear the interrupt */
/* via[IFR] = SR_INT; */
switch_start:
switch (maciisi_state) {
case idle:
if (status & TIP)
printk(KERN_ERR "maciisi_interrupt: state is idle but TIP asserted!\n");
if(!reading_reply)
udelay(ADB_DELAY);
/* Shift in */
via[ACR] &= ~SR_OUT;
/* Signal start of frame */
via[B] |= TIP;
/* Clear the interrupt (throw this value on the floor, it's useless) */
tmp = via[SR];
/* ACK adb chip, high-low */
via[B] |= TACK;
udelay(ADB_DELAY);
via[B] &= ~TACK;
reply_len = 0;
maciisi_state = reading;
if (reading_reply) {
reply_ptr = current_req->reply;
} else {
reply_ptr = maciisi_rbuf;
}
break;
case sending:
/* via[SR]; */
/* Set ACK off */
via[B] &= ~TACK;
req = current_req;
if (!(status & TREQ)) {
/* collision */
printk(KERN_ERR "maciisi_interrupt: send collision\n");
/* Set idle and input */
via[ACR] &= ~SR_OUT;
tmp = via[SR];
via[B] &= ~TIP;
/* Must re-send */
reading_reply = 0;
reply_len = 0;
maciisi_state = idle;
udelay(ADB_DELAY);
/* process this now, because the IFR has been cleared */
goto switch_start;
}
udelay(ADB_DELAY);
if (data_index >= req->nbytes) {
/* Sent the whole packet, put the bus back in idle state */
/* Shift in, we are about to read a reply (hopefully) */
via[ACR] &= ~SR_OUT;
tmp = via[SR];
/* End of frame */
via[B] &= ~TIP;
req->sent = 1;
maciisi_state = idle;
if (req->reply_expected) {
/* Note: only set this once we've
successfully sent the packet */
reading_reply = 1;
} else {
current_req = req->next;
if (req->done)
(*req->done)(req);
/* Do any queued requests now */
i = maciisi_start();
if(i == 0 && need_sync) {
/* Packet needs to be synced */
maciisi_sync(current_req);
}
if(i != -EBUSY)
need_sync = 0;
}
} else {
/* Sending more stuff */
/* Shift out */
via[ACR] |= SR_OUT;
/* Write */
via[SR] = req->data[data_index++];
/* Signal 'byte ready' */
via[B] |= TACK;
}
break;
case reading:
/* Shift in */
/* via[ACR] &= ~SR_OUT; */ /* Not in 2.2 */
if (reply_len++ > 16) {
printk(KERN_ERR "maciisi_interrupt: reply too long, aborting read\n");
via[B] |= TACK;
udelay(ADB_DELAY);
via[B] &= ~(TACK|TIP);
maciisi_state = idle;
i = maciisi_start();
if(i == 0 && need_sync) {
/* Packet needs to be synced */
maciisi_sync(current_req);
}
if(i != -EBUSY)
need_sync = 0;
break;
}
/* Read data */
*reply_ptr++ = via[SR];
status = via[B] & (TIP|TREQ);
/* ACK on/off */
via[B] |= TACK;
udelay(ADB_DELAY);
via[B] &= ~TACK;
if (!(status & TREQ))
break; /* more stuff to deal with */
/* end of frame */
via[B] &= ~TIP;
tmp = via[SR]; /* That's what happens in 2.2 */
udelay(ADB_DELAY); /* Give controller time to recover */
/* end of packet, deal with it */
if (reading_reply) {
req = current_req;
req->reply_len = reply_ptr - req->reply;
if (req->data[0] == ADB_PACKET) {
/* Have to adjust the reply from ADB commands */
if (req->reply_len <= 2 || (req->reply[1] & 2) != 0) {
/* the 0x2 bit indicates no response */
req->reply_len = 0;
} else {
/* leave just the command and result bytes in the reply */
req->reply_len -= 2;
memmove(req->reply, req->reply + 2, req->reply_len);
}
}
#ifdef DEBUG_MACIISI_ADB
if (dump_reply) {
int i;
printk(KERN_DEBUG "maciisi_interrupt: reply is ");
for (i = 0; i < req->reply_len; ++i)
printk(" %.2x", req->reply[i]);
printk("\n");
}
#endif
req->complete = 1;
current_req = req->next;
if (req->done)
(*req->done)(req);
/* Obviously, we got it */
reading_reply = 0;
} else {
maciisi_input(maciisi_rbuf, reply_ptr - maciisi_rbuf);
}
maciisi_state = idle;
status = via[B] & (TIP|TREQ);
if (!(status & TREQ)) {
/* Timeout?! More likely, another packet coming in already */
#ifdef DEBUG_MACIISI_ADB
printk(KERN_DEBUG "extra data after packet: status %x ifr %x\n",
status, via[IFR]);
#endif
#if 0
udelay(ADB_DELAY);
via[B] |= TIP;
maciisi_state = reading;
reading_reply = 0;
reply_ptr = maciisi_rbuf;
#else
/* Process the packet now */
reading_reply = 0;
goto switch_start;
#endif
/* We used to do this... but the controller might actually have data for us */
/* maciisi_stfu(); */
}
else {
/* Do any queued requests now if possible */
i = maciisi_start();
if(i == 0 && need_sync) {
/* Packet needs to be synced */
maciisi_sync(current_req);
}
if(i != -EBUSY)
need_sync = 0;
}
break;
default:
printk("maciisi_interrupt: unknown maciisi_state %d?\n", maciisi_state);
}
local_irq_restore(flags);
return IRQ_HANDLED;
}
static void
maciisi_input(unsigned char *buf, int nb)
{
#ifdef DEBUG_MACIISI_ADB
int i;
#endif
switch (buf[0]) {
case ADB_PACKET:
adb_input(buf+2, nb-2, buf[1] & 0x40);
break;
default:
#ifdef DEBUG_MACIISI_ADB
printk(KERN_DEBUG "data from IIsi ADB (%d bytes):", nb);
for (i = 0; i < nb; ++i)
printk(" %.2x", buf[i]);
printk("\n");
#endif
break;
}
}
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