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Message-Id: <8199620b3b2ef7e208d65624895f85385996babc.1480572271.git.fthain@telegraphics.com.au>
Date: Thu, 1 Dec 2016 01:09:34 -0500 (EST)
From: Finn Thain <fthain@...egraphics.com.au>
To: Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: linux-m68k@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 10/10] 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: Stan Johnson <userm57@...oo.com>
Signed-off-by: Finn Thain <fthain@...egraphics.com.au>
---
arch/m68k/include/asm/macintosh.h | 2 +-
arch/m68k/mac/config.c | 18 +-
arch/m68k/mac/misc.c | 72 +---
drivers/macintosh/Kconfig | 24 +-
drivers/macintosh/Makefile | 1 -
drivers/macintosh/adb.c | 4 -
drivers/macintosh/via-cuda.c | 8 +-
drivers/macintosh/via-maciisi.c | 677 --------------------------------------
8 files changed, 30 insertions(+), 776 deletions(-)
delete mode 100644 drivers/macintosh/via-maciisi.c
diff --git a/arch/m68k/include/asm/macintosh.h b/arch/m68k/include/asm/macintosh.h
index 42235e7..5b81ab1 100644
--- a/arch/m68k/include/asm/macintosh.h
+++ b/arch/m68k/include/asm/macintosh.h
@@ -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
diff --git a/arch/m68k/mac/config.c b/arch/m68k/mac/config.c
index 689b47d..91b58d0 100644
--- a/arch/m68k/mac/config.c
+++ b/arch/m68k/mac/config.c
@@ -285,7 +285,7 @@ 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,
@@ -294,7 +294,7 @@ 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,
@@ -303,7 +303,7 @@ 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,
@@ -318,7 +318,7 @@ 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,
@@ -351,7 +351,7 @@ 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,
@@ -360,7 +360,7 @@ 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,
@@ -369,7 +369,7 @@ 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,
@@ -497,7 +497,7 @@ 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,
@@ -574,7 +574,7 @@ 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,
diff --git a/arch/m68k/mac/misc.c b/arch/m68k/mac/misc.c
index 707b61a..c79570a 100644
--- a/arch/m68k/mac/misc.c
+++ b/arch/m68k/mac/misc.c
@@ -143,54 +143,6 @@ 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
*
@@ -459,11 +411,10 @@ 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:
@@ -482,11 +433,10 @@ 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:
@@ -501,17 +451,13 @@ 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
@@ -551,7 +497,8 @@ 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
@@ -700,13 +647,11 @@ 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;
@@ -738,6 +683,7 @@ 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;
@@ -745,8 +691,6 @@ 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;
diff --git a/drivers/macintosh/Kconfig b/drivers/macintosh/Kconfig
index 5844b80..b2f3588 100644
--- a/drivers/macintosh/Kconfig
+++ b/drivers/macintosh/Kconfig
@@ -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.
diff --git a/drivers/macintosh/Makefile b/drivers/macintosh/Makefile
index 383ba92..516eb65b 100644
--- a/drivers/macintosh/Makefile
+++ b/drivers/macintosh/Makefile
@@ -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
diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c
index 226179b..152414e 100644
--- a/drivers/macintosh/adb.c
+++ b/drivers/macintosh/adb.c
@@ -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
diff --git a/drivers/macintosh/via-cuda.c b/drivers/macintosh/via-cuda.c
index 3254070..20c81e7 100644
--- a/drivers/macintosh/via-cuda.c
+++ b/drivers/macintosh/via-cuda.c
@@ -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)
diff --git a/drivers/macintosh/via-maciisi.c b/drivers/macintosh/via-maciisi.c
deleted file mode 100644
index 34d02a9..0000000
--- a/drivers/macintosh/via-maciisi.c
+++ /dev/null
@@ -1,677 +0,0 @@
-/*
- * 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@...ian.org>
- *
- * 7/13/2000- extensive changes by Andrew McPherson <andrew@...duff.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;
- }
-}
--
2.7.3
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