Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-25 13:41:51 +00:00
Code Issues Packages Projects Releases Wiki Activity
30dfd12f53
linux/drivers/pcmcia/i82365.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

1361 lines
37 KiB
C
Raw Blame History

/*======================================================================
Device driver for Intel 82365 and compatible PC Card controllers.
i82365.c 1.265 1999/11/10 18:36:21
The contents of this file are subject to the Mozilla Public
License Version 1.1 (the "License"); you may not use this file
except in compliance with the License. You may obtain a copy of
the License at http://www.mozilla.org/MPL/
Software distributed under the License is distributed on an "AS
IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
implied. See the License for the specific language governing
rights and limitations under the License.
The initial developer of the original code is David A. Hinds
<dahinds@users.sourceforge.net>. Portions created by David A. Hinds
are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
Alternatively, the contents of this file may be used under the
terms of the GNU General Public License version 2 (the "GPL"), in which
case the provisions of the GPL are applicable instead of the
above. If you wish to allow the use of your version of this file
only under the terms of the GPL and not to allow others to use
your version of this file under the MPL, indicate your decision
by deleting the provisions above and replace them with the notice
and other provisions required by the GPL. If you do not delete
the provisions above, a recipient may use your version of this
file under either the MPL or the GPL.
======================================================================*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/timer.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/bitops.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/system.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <pcmcia/cs.h>
#include <linux/isapnp.h>
/* ISA-bus controllers */
#include "i82365.h"
#include "cirrus.h"
#include "vg468.h"
#include "ricoh.h"
#ifdef DEBUG
static const char version[] =
"i82365.c 1.265 1999/11/10 18:36:21 (David Hinds)";
static int pc_debug;
module_param(pc_debug, int, 0644);
#define debug(lvl, fmt, arg...) do { \
if (pc_debug > (lvl)) \
printk(KERN_DEBUG "i82365: " fmt , ## arg); \
} while (0)
#else
#define debug(lvl, fmt, arg...) do { } while (0)
#endif
static irqreturn_t i365_count_irq(int, void *);
static inline int _check_irq(int irq, int flags)
{
if (request_irq(irq, i365_count_irq, flags, "x", i365_count_irq) != 0)
return -1;
free_irq(irq, i365_count_irq);
return 0;
}
/*====================================================================*/
/* Parameters that can be set with 'insmod' */
/* Default base address for i82365sl and other ISA chips */
static unsigned long i365_base = 0x3e0;
/* Should we probe at 0x3e2 for an extra ISA controller? */
static int extra_sockets = 0;
/* Specify a socket number to ignore */
static int ignore = -1;
/* Bit map or list of interrupts to choose from */
static u_int irq_mask = 0xffff;
static int irq_list[16];
static int irq_list_count;
/* The card status change interrupt -- 0 means autoselect */
static int cs_irq = 0;
/* Probe for safe interrupts? */
static int do_scan = 1;
/* Poll status interval -- 0 means default to interrupt */
static int poll_interval = 0;
/* External clock time, in nanoseconds. 120 ns = 8.33 MHz */
static int cycle_time = 120;
/* Cirrus options */
static int has_dma = -1;
static int has_led = -1;
static int has_ring = -1;
static int dynamic_mode = 0;
static int freq_bypass = -1;
static int setup_time = -1;
static int cmd_time = -1;
static int recov_time = -1;
/* Vadem options */
static int async_clock = -1;
static int cable_mode = -1;
static int wakeup = 0;
module_param(i365_base, ulong, 0444);
module_param(ignore, int, 0444);
module_param(extra_sockets, int, 0444);
module_param(irq_mask, int, 0444);
module_param_array(irq_list, int, &irq_list_count, 0444);
module_param(cs_irq, int, 0444);
module_param(async_clock, int, 0444);
module_param(cable_mode, int, 0444);
module_param(wakeup, int, 0444);
module_param(do_scan, int, 0444);
module_param(poll_interval, int, 0444);
module_param(cycle_time, int, 0444);
module_param(has_dma, int, 0444);
module_param(has_led, int, 0444);
module_param(has_ring, int, 0444);
module_param(dynamic_mode, int, 0444);
module_param(freq_bypass, int, 0444);
module_param(setup_time, int, 0444);
module_param(cmd_time, int, 0444);
module_param(recov_time, int, 0444);
/*====================================================================*/
typedef struct cirrus_state_t {
u_char misc1, misc2;
u_char timer[6];
} cirrus_state_t;
typedef struct vg46x_state_t {
u_char ctl, ema;
} vg46x_state_t;
struct i82365_socket {
u_short type, flags;
struct pcmcia_socket socket;
unsigned int number;
kio_addr_t ioaddr;
u_short psock;
u_char cs_irq, intr;
union {
cirrus_state_t cirrus;
vg46x_state_t vg46x;
} state;
};
/* Where we keep track of our sockets... */
static int sockets = 0;
static struct i82365_socket socket[8] = {
{ 0, }, /* ... */
};
/* Default ISA interrupt mask */
#define I365_MASK 0xdeb8 /* irq 15,14,12,11,10,9,7,5,4,3 */
static int grab_irq;
static DEFINE_SPINLOCK(isa_lock);
#define ISA_LOCK(n, f) spin_lock_irqsave(&isa_lock, f)
#define ISA_UNLOCK(n, f) spin_unlock_irqrestore(&isa_lock, f)
static struct timer_list poll_timer;
/*====================================================================*/
/* These definitions must match the pcic table! */
typedef enum pcic_id {
IS_I82365A, IS_I82365B, IS_I82365DF,
IS_IBM, IS_RF5Cx96, IS_VLSI, IS_VG468, IS_VG469,
IS_PD6710, IS_PD672X, IS_VT83C469,
} pcic_id;
/* Flags for classifying groups of controllers */
#define IS_VADEM 0x0001
#define IS_CIRRUS 0x0002
#define IS_VIA 0x0010
#define IS_UNKNOWN 0x0400
#define IS_VG_PWR 0x0800
#define IS_DF_PWR 0x1000
#define IS_REGISTERED 0x2000
#define IS_ALIVE 0x8000
typedef struct pcic_t {
char *name;
u_short flags;
} pcic_t;
static pcic_t pcic[] = {
{ "Intel i82365sl A step", 0 },
{ "Intel i82365sl B step", 0 },
{ "Intel i82365sl DF", IS_DF_PWR },
{ "IBM Clone", 0 },
{ "Ricoh RF5C296/396", 0 },
{ "VLSI 82C146", 0 },
{ "Vadem VG-468", IS_VADEM },
{ "Vadem VG-469", IS_VADEM|IS_VG_PWR },
{ "Cirrus PD6710", IS_CIRRUS },
{ "Cirrus PD672x", IS_CIRRUS },
{ "VIA VT83C469", IS_CIRRUS|IS_VIA },
};
#define PCIC_COUNT (sizeof(pcic)/sizeof(pcic_t))
/*====================================================================*/
static DEFINE_SPINLOCK(bus_lock);
static u_char i365_get(u_short sock, u_short reg)
{
unsigned long flags;
spin_lock_irqsave(&bus_lock,flags);
{
kio_addr_t port = socket[sock].ioaddr;
u_char val;
reg = I365_REG(socket[sock].psock, reg);
outb(reg, port); val = inb(port+1);
spin_unlock_irqrestore(&bus_lock,flags);
return val;
}
}
static void i365_set(u_short sock, u_short reg, u_char data)
{
unsigned long flags;
spin_lock_irqsave(&bus_lock,flags);
{
kio_addr_t port = socket[sock].ioaddr;
u_char val = I365_REG(socket[sock].psock, reg);
outb(val, port); outb(data, port+1);
spin_unlock_irqrestore(&bus_lock,flags);
}
}
static void i365_bset(u_short sock, u_short reg, u_char mask)
{
u_char d = i365_get(sock, reg);
d |= mask;
i365_set(sock, reg, d);
}
static void i365_bclr(u_short sock, u_short reg, u_char mask)
{
u_char d = i365_get(sock, reg);
d &= ~mask;
i365_set(sock, reg, d);
}
static void i365_bflip(u_short sock, u_short reg, u_char mask, int b)
{
u_char d = i365_get(sock, reg);
if (b)
d |= mask;
else
d &= ~mask;
i365_set(sock, reg, d);
}
static u_short i365_get_pair(u_short sock, u_short reg)
{
u_short a, b;
a = i365_get(sock, reg);
b = i365_get(sock, reg+1);
return (a + (b<<8));
}
static void i365_set_pair(u_short sock, u_short reg, u_short data)
{
i365_set(sock, reg, data & 0xff);
i365_set(sock, reg+1, data >> 8);
}
/*======================================================================
Code to save and restore global state information for Cirrus
PD67xx controllers, and to set and report global configuration
options.
The VIA controllers also use these routines, as they are mostly
Cirrus lookalikes, without the timing registers.
======================================================================*/
#define flip(v,b,f) (v = ((f)<0) ? v : ((f) ? ((v)|(b)) : ((v)&(~b))))
static void cirrus_get_state(u_short s)
{
int i;
cirrus_state_t *p = &socket[s].state.cirrus;
p->misc1 = i365_get(s, PD67_MISC_CTL_1);
p->misc1 &= (PD67_MC1_MEDIA_ENA | PD67_MC1_INPACK_ENA);
p->misc2 = i365_get(s, PD67_MISC_CTL_2);
for (i = 0; i < 6; i++)
p->timer[i] = i365_get(s, PD67_TIME_SETUP(0)+i);
}
static void cirrus_set_state(u_short s)
{
int i;
u_char misc;
cirrus_state_t *p = &socket[s].state.cirrus;
misc = i365_get(s, PD67_MISC_CTL_2);
i365_set(s, PD67_MISC_CTL_2, p->misc2);
if (misc & PD67_MC2_SUSPEND) mdelay(50);
misc = i365_get(s, PD67_MISC_CTL_1);
misc &= ~(PD67_MC1_MEDIA_ENA | PD67_MC1_INPACK_ENA);
i365_set(s, PD67_MISC_CTL_1, misc | p->misc1);
for (i = 0; i < 6; i++)
i365_set(s, PD67_TIME_SETUP(0)+i, p->timer[i]);
}
static u_int __init cirrus_set_opts(u_short s, char *buf)
{
struct i82365_socket *t = &socket[s];
cirrus_state_t *p = &socket[s].state.cirrus;
u_int mask = 0xffff;
if (has_ring == -1) has_ring = 1;
flip(p->misc2, PD67_MC2_IRQ15_RI, has_ring);
flip(p->misc2, PD67_MC2_DYNAMIC_MODE, dynamic_mode);
flip(p->misc2, PD67_MC2_FREQ_BYPASS, freq_bypass);
if (p->misc2 & PD67_MC2_IRQ15_RI)
strcat(buf, " [ring]");
if (p->misc2 & PD67_MC2_DYNAMIC_MODE)
strcat(buf, " [dyn mode]");
if (p->misc2 & PD67_MC2_FREQ_BYPASS)
strcat(buf, " [freq bypass]");
if (p->misc1 & PD67_MC1_INPACK_ENA)
strcat(buf, " [inpack]");
if (p->misc2 & PD67_MC2_IRQ15_RI)
mask &= ~0x8000;
if (has_led > 0) {
strcat(buf, " [led]");
mask &= ~0x1000;
}
if (has_dma > 0) {
strcat(buf, " [dma]");
mask &= ~0x0600;
}
if (!(t->flags & IS_VIA)) {
if (setup_time >= 0)
p->timer[0] = p->timer[3] = setup_time;
if (cmd_time > 0) {
p->timer[1] = cmd_time;
p->timer[4] = cmd_time*2+4;
}
if (p->timer[1] == 0) {
p->timer[1] = 6; p->timer[4] = 16;
if (p->timer[0] == 0)
p->timer[0] = p->timer[3] = 1;
}
if (recov_time >= 0)
p->timer[2] = p->timer[5] = recov_time;
buf += strlen(buf);
sprintf(buf, " [%d/%d/%d] [%d/%d/%d]", p->timer[0], p->timer[1],
p->timer[2], p->timer[3], p->timer[4], p->timer[5]);
}
return mask;
}
/*======================================================================
Code to save and restore global state information for Vadem VG468
and VG469 controllers, and to set and report global configuration
options.
======================================================================*/
static void vg46x_get_state(u_short s)
{
vg46x_state_t *p = &socket[s].state.vg46x;
p->ctl = i365_get(s, VG468_CTL);
if (socket[s].type == IS_VG469)
p->ema = i365_get(s, VG469_EXT_MODE);
}
static void vg46x_set_state(u_short s)
{
vg46x_state_t *p = &socket[s].state.vg46x;
i365_set(s, VG468_CTL, p->ctl);
if (socket[s].type == IS_VG469)
i365_set(s, VG469_EXT_MODE, p->ema);
}
static u_int __init vg46x_set_opts(u_short s, char *buf)
{
vg46x_state_t *p = &socket[s].state.vg46x;
flip(p->ctl, VG468_CTL_ASYNC, async_clock);
flip(p->ema, VG469_MODE_CABLE, cable_mode);
if (p->ctl & VG468_CTL_ASYNC)
strcat(buf, " [async]");
if (p->ctl & VG468_CTL_INPACK)
strcat(buf, " [inpack]");
if (socket[s].type == IS_VG469) {
u_char vsel = i365_get(s, VG469_VSELECT);
if (vsel & VG469_VSEL_EXT_STAT) {
strcat(buf, " [ext mode]");
if (vsel & VG469_VSEL_EXT_BUS)
strcat(buf, " [isa buf]");
}
if (p->ema & VG469_MODE_CABLE)
strcat(buf, " [cable]");
if (p->ema & VG469_MODE_COMPAT)
strcat(buf, " [c step]");
}
return 0xffff;
}
/*======================================================================
Generic routines to get and set controller options
======================================================================*/
static void get_bridge_state(u_short s)
{
struct i82365_socket *t = &socket[s];
if (t->flags & IS_CIRRUS)
cirrus_get_state(s);
else if (t->flags & IS_VADEM)
vg46x_get_state(s);
}
static void set_bridge_state(u_short s)
{
struct i82365_socket *t = &socket[s];
if (t->flags & IS_CIRRUS)
cirrus_set_state(s);
else {
i365_set(s, I365_GBLCTL, 0x00);
i365_set(s, I365_GENCTL, 0x00);
}
i365_bflip(s, I365_INTCTL, I365_INTR_ENA, t->intr);
if (t->flags & IS_VADEM)
vg46x_set_state(s);
}
static u_int __init set_bridge_opts(u_short s, u_short ns)
{
u_short i;
u_int m = 0xffff;
char buf[128];
for (i = s; i < s+ns; i++) {
if (socket[i].flags & IS_ALIVE) {
printk(KERN_INFO " host opts [%d]: already alive!\n", i);
continue;
}
buf[0] = '\0';
get_bridge_state(i);
if (socket[i].flags & IS_CIRRUS)
m = cirrus_set_opts(i, buf);
else if (socket[i].flags & IS_VADEM)
m = vg46x_set_opts(i, buf);
set_bridge_state(i);
printk(KERN_INFO " host opts [%d]:%s\n", i,
(*buf) ? buf : " none");
}
return m;
}
/*======================================================================
Interrupt testing code, for ISA and PCI interrupts
======================================================================*/
static volatile u_int irq_hits;
static u_short irq_sock;
static irqreturn_t i365_count_irq(int irq, void *dev)
{
i365_get(irq_sock, I365_CSC);
irq_hits++;
debug(2, "-> hit on irq %d\n", irq);
return IRQ_HANDLED;
}
static u_int __init test_irq(u_short sock, int irq)
{
debug(2, " testing ISA irq %d\n", irq);
if (request_irq(irq, i365_count_irq, IRQF_PROBE_SHARED, "scan",
i365_count_irq) != 0)
return 1;
irq_hits = 0; irq_sock = sock;
msleep(10);
if (irq_hits) {
free_irq(irq, i365_count_irq);
debug(2, " spurious hit!\n");
return 1;
}
/* Generate one interrupt */
i365_set(sock, I365_CSCINT, I365_CSC_DETECT | (irq << 4));
i365_bset(sock, I365_GENCTL, I365_CTL_SW_IRQ);
udelay(1000);
free_irq(irq, i365_count_irq);
/* mask all interrupts */
i365_set(sock, I365_CSCINT, 0);
debug(2, " hits = %d\n", irq_hits);
return (irq_hits != 1);
}
static u_int __init isa_scan(u_short sock, u_int mask0)
{
u_int mask1 = 0;
int i;
#ifdef __alpha__
#define PIC 0x4d0
/* Don't probe level-triggered interrupts -- reserved for PCI */
mask0 &= ~(inb(PIC) | (inb(PIC+1) << 8));
#endif
if (do_scan) {
set_bridge_state(sock);
i365_set(sock, I365_CSCINT, 0);
for (i = 0; i < 16; i++)
if ((mask0 & (1 << i)) && (test_irq(sock, i) == 0))
mask1 |= (1 << i);
for (i = 0; i < 16; i++)
if ((mask1 & (1 << i)) && (test_irq(sock, i) != 0))
mask1 ^= (1 << i);
}
printk(KERN_INFO " ISA irqs (");
if (mask1) {
printk("scanned");
} else {
/* Fallback: just find interrupts that aren't in use */
for (i = 0; i < 16; i++)
if ((mask0 & (1 << i)) && (_check_irq(i, IRQF_PROBE_SHARED) == 0))
mask1 |= (1 << i);
printk("default");
/* If scan failed, default to polled status */
if (!cs_irq && (poll_interval == 0)) poll_interval = HZ;
}
printk(") = ");
for (i = 0; i < 16; i++)
if (mask1 & (1<<i))
printk("%s%d", ((mask1 & ((1<<i)-1)) ? "," : ""), i);
if (mask1 == 0) printk("none!");
return mask1;
}
/*====================================================================*/
/* Time conversion functions */
static int to_cycles(int ns)
{
return ns/cycle_time;
}
/*====================================================================*/
static int __init identify(kio_addr_t port, u_short sock)
{
u_char val;
int type = -1;
/* Use the next free entry in the socket table */
socket[sockets].ioaddr = port;
socket[sockets].psock = sock;
/* Wake up a sleepy Cirrus controller */
if (wakeup) {
i365_bclr(sockets, PD67_MISC_CTL_2, PD67_MC2_SUSPEND);
/* Pause at least 50 ms */
mdelay(50);
}
if ((val = i365_get(sockets, I365_IDENT)) & 0x70)
return -1;
switch (val) {
case 0x82:
type = IS_I82365A; break;
case 0x83:
type = IS_I82365B; break;
case 0x84:
type = IS_I82365DF; break;
case 0x88: case 0x89: case 0x8a:
type = IS_IBM; break;
}
/* Check for Vadem VG-468 chips */
outb(0x0e, port);
outb(0x37, port);
i365_bset(sockets, VG468_MISC, VG468_MISC_VADEMREV);
val = i365_get(sockets, I365_IDENT);
if (val & I365_IDENT_VADEM) {
i365_bclr(sockets, VG468_MISC, VG468_MISC_VADEMREV);
type = ((val & 7) >= 4) ? IS_VG469 : IS_VG468;
}
/* Check for Ricoh chips */
val = i365_get(sockets, RF5C_CHIP_ID);
if ((val == RF5C_CHIP_RF5C296) || (val == RF5C_CHIP_RF5C396))
type = IS_RF5Cx96;
/* Check for Cirrus CL-PD67xx chips */
i365_set(sockets, PD67_CHIP_INFO, 0);
val = i365_get(sockets, PD67_CHIP_INFO);
if ((val & PD67_INFO_CHIP_ID) == PD67_INFO_CHIP_ID) {
val = i365_get(sockets, PD67_CHIP_INFO);
if ((val & PD67_INFO_CHIP_ID) == 0) {
type = (val & PD67_INFO_SLOTS) ? IS_PD672X : IS_PD6710;
i365_set(sockets, PD67_EXT_INDEX, 0xe5);
if (i365_get(sockets, PD67_EXT_INDEX) != 0xe5)
type = IS_VT83C469;
}
}
return type;
} /* identify */
/*======================================================================
See if a card is present, powered up, in IO mode, and already
bound to a (non PC Card) Linux driver. We leave these alone.
We make an exception for cards that seem to be serial devices.
======================================================================*/
static int __init is_alive(u_short sock)
{
u_char stat;
kio_addr_t start, stop;
stat = i365_get(sock, I365_STATUS);
start = i365_get_pair(sock, I365_IO(0)+I365_W_START);
stop = i365_get_pair(sock, I365_IO(0)+I365_W_STOP);
if ((stat & I365_CS_DETECT) && (stat & I365_CS_POWERON) &&
(i365_get(sock, I365_INTCTL) & I365_PC_IOCARD) &&
(i365_get(sock, I365_ADDRWIN) & I365_ENA_IO(0)) &&
((start & 0xfeef) != 0x02e8)) {
if (!request_region(start, stop-start+1, "i82365"))
return 1;
release_region(start, stop-start+1);
}
return 0;
}
/*====================================================================*/
static void __init add_socket(kio_addr_t port, int psock, int type)
{
socket[sockets].ioaddr = port;
socket[sockets].psock = psock;
socket[sockets].type = type;
socket[sockets].flags = pcic[type].flags;
if (is_alive(sockets))
socket[sockets].flags |= IS_ALIVE;
sockets++;
}
static void __init add_pcic(int ns, int type)
{
u_int mask = 0, i, base;
int isa_irq = 0;
struct i82365_socket *t = &socket[sockets-ns];
base = sockets-ns;
if (base == 0) printk("\n");
printk(KERN_INFO " %s", pcic[type].name);
printk(" ISA-to-PCMCIA at port %#lx ofs 0x%02x",
t->ioaddr, t->psock*0x40);
printk(", %d socket%s\n", ns, ((ns > 1) ? "s" : ""));
/* Set host options, build basic interrupt mask */
if (irq_list_count == 0)
mask = irq_mask;
else
for (i = mask = 0; i < irq_list_count; i++)
mask |= (1<<irq_list[i]);
mask &= I365_MASK & set_bridge_opts(base, ns);
/* Scan for ISA interrupts */
mask = isa_scan(base, mask);
/* Poll if only two interrupts available */
if (!poll_interval) {
u_int tmp = (mask & 0xff20);
tmp = tmp & (tmp-1);
if ((tmp & (tmp-1)) == 0)
poll_interval = HZ;
}
/* Only try an ISA cs_irq if this is the first controller */
if (!grab_irq && (cs_irq || !poll_interval)) {
/* Avoid irq 12 unless it is explicitly requested */
u_int cs_mask = mask & ((cs_irq) ? (1<<cs_irq) : ~(1<<12));
for (cs_irq = 15; cs_irq > 0; cs_irq--)
if ((cs_mask & (1 << cs_irq)) &&
(_check_irq(cs_irq, IRQF_PROBE_SHARED) == 0))
break;
if (cs_irq) {
grab_irq = 1;
isa_irq = cs_irq;
printk(" status change on irq %d\n", cs_irq);
}
}
if (!isa_irq) {
if (poll_interval == 0)
poll_interval = HZ;
printk(" polling interval = %d ms\n",
poll_interval * 1000 / HZ);
}
/* Update socket interrupt information, capabilities */
for (i = 0; i < ns; i++) {
t[i].socket.features |= SS_CAP_PCCARD;
t[i].socket.map_size = 0x1000;
t[i].socket.irq_mask = mask;
t[i].cs_irq = isa_irq;
}
} /* add_pcic */
/*====================================================================*/
#ifdef CONFIG_PNP
static struct isapnp_device_id id_table[] __initdata = {
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('P', 'N', 'P'),
ISAPNP_FUNCTION(0x0e00), (unsigned long) "Intel 82365-Compatible" },
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('P', 'N', 'P'),
ISAPNP_FUNCTION(0x0e01), (unsigned long) "Cirrus Logic CL-PD6720" },
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('P', 'N', 'P'),
ISAPNP_FUNCTION(0x0e02), (unsigned long) "VLSI VL82C146" },
{ 0 }
};
MODULE_DEVICE_TABLE(isapnp, id_table);
static struct pnp_dev *i82365_pnpdev;
#endif
static void __init isa_probe(void)
{
int i, j, sock, k, ns, id;
kio_addr_t port;
#ifdef CONFIG_PNP
struct isapnp_device_id *devid;
struct pnp_dev *dev;
for (devid = id_table; devid->vendor; devid++) {
if ((dev = pnp_find_dev(NULL, devid->vendor, devid->function, NULL))) {
if (pnp_device_attach(dev) < 0)
continue;
if (pnp_activate_dev(dev) < 0) {
printk("activate failed\n");
pnp_device_detach(dev);
break;
}
if (!pnp_port_valid(dev, 0)) {
printk("invalid resources ?\n");
pnp_device_detach(dev);
break;
}
i365_base = pnp_port_start(dev, 0);
i82365_pnpdev = dev;
break;
}
}
#endif
if (!request_region(i365_base, 2, "i82365")) {
if (sockets == 0)
printk("port conflict at %#lx\n", i365_base);
return;
}
id = identify(i365_base, 0);
if ((id == IS_I82365DF) && (identify(i365_base, 1) != id)) {
for (i = 0; i < 4; i++) {
if (i == ignore) continue;
port = i365_base + ((i & 1) << 2) + ((i & 2) << 1);
sock = (i & 1) << 1;
if (identify(port, sock) == IS_I82365DF) {
add_socket(port, sock, IS_VLSI);
add_pcic(1, IS_VLSI);
}
}
} else {
for (i = 0; i < 8; i += 2) {
if (sockets && !extra_sockets && (i == 4))
break;
port = i365_base + 2*(i>>2);
sock = (i & 3);
id = identify(port, sock);
if (id < 0) continue;
for (j = ns = 0; j < 2; j++) {
/* Does the socket exist? */
if ((ignore == i+j) || (identify(port, sock+j) < 0))
continue;
/* Check for bad socket decode */
for (k = 0; k <= sockets; k++)
i365_set(k, I365_MEM(0)+I365_W_OFF, k);
for (k = 0; k <= sockets; k++)
if (i365_get(k, I365_MEM(0)+I365_W_OFF) != k)
break;
if (k <= sockets) break;
add_socket(port, sock+j, id); ns++;
}
if (ns != 0) add_pcic(ns, id);
}
}
}
/*====================================================================*/
static irqreturn_t pcic_interrupt(int irq, void *dev)
{
int i, j, csc;
u_int events, active;
u_long flags = 0;
int handled = 0;
debug(4, "pcic_interrupt(%d)\n", irq);
for (j = 0; j < 20; j++) {
active = 0;
for (i = 0; i < sockets; i++) {
if (socket[i].cs_irq != irq)
continue;
handled = 1;
ISA_LOCK(i, flags);
csc = i365_get(i, I365_CSC);
if ((csc == 0) || (i365_get(i, I365_IDENT) & 0x70)) {
ISA_UNLOCK(i, flags);
continue;
}
events = (csc & I365_CSC_DETECT) ? SS_DETECT : 0;
if (i365_get(i, I365_INTCTL) & I365_PC_IOCARD)
events |= (csc & I365_CSC_STSCHG) ? SS_STSCHG : 0;
else {
events |= (csc & I365_CSC_BVD1) ? SS_BATDEAD : 0;
events |= (csc & I365_CSC_BVD2) ? SS_BATWARN : 0;
events |= (csc & I365_CSC_READY) ? SS_READY : 0;
}
ISA_UNLOCK(i, flags);
debug(2, "socket %d event 0x%02x\n", i, events);
if (events)
pcmcia_parse_events(&socket[i].socket, events);
active |= events;
}
if (!active) break;
}
if (j == 20)
printk(KERN_NOTICE "i82365: infinite loop in interrupt handler\n");
debug(4, "interrupt done\n");
return IRQ_RETVAL(handled);
} /* pcic_interrupt */
static void pcic_interrupt_wrapper(u_long data)
{
pcic_interrupt(0, NULL);
poll_timer.expires = jiffies + poll_interval;
add_timer(&poll_timer);
}
/*====================================================================*/
static int i365_get_status(u_short sock, u_int *value)
{
u_int status;
status = i365_get(sock, I365_STATUS);
*value = ((status & I365_CS_DETECT) == I365_CS_DETECT)
? SS_DETECT : 0;
if (i365_get(sock, I365_INTCTL) & I365_PC_IOCARD)
*value |= (status & I365_CS_STSCHG) ? 0 : SS_STSCHG;
else {
*value |= (status & I365_CS_BVD1) ? 0 : SS_BATDEAD;
*value |= (status & I365_CS_BVD2) ? 0 : SS_BATWARN;
}
*value |= (status & I365_CS_WRPROT) ? SS_WRPROT : 0;
*value |= (status & I365_CS_READY) ? SS_READY : 0;
*value |= (status & I365_CS_POWERON) ? SS_POWERON : 0;
if (socket[sock].type == IS_VG469) {
status = i365_get(sock, VG469_VSENSE);
if (socket[sock].psock & 1) {
*value |= (status & VG469_VSENSE_B_VS1) ? 0 : SS_3VCARD;
*value |= (status & VG469_VSENSE_B_VS2) ? 0 : SS_XVCARD;
} else {
*value |= (status & VG469_VSENSE_A_VS1) ? 0 : SS_3VCARD;
*value |= (status & VG469_VSENSE_A_VS2) ? 0 : SS_XVCARD;
}
}
debug(1, "GetStatus(%d) = %#4.4x\n", sock, *value);
return 0;
} /* i365_get_status */
/*====================================================================*/
static int i365_set_socket(u_short sock, socket_state_t *state)
{
struct i82365_socket *t = &socket[sock];
u_char reg;
debug(1, "SetSocket(%d, flags %#3.3x, Vcc %d, Vpp %d, "
"io_irq %d, csc_mask %#2.2x)\n", sock, state->flags,
state->Vcc, state->Vpp, state->io_irq, state->csc_mask);
/* First set global controller options */
set_bridge_state(sock);
/* IO card, RESET flag, IO interrupt */
reg = t->intr;
reg |= state->io_irq;
reg |= (state->flags & SS_RESET) ? 0 : I365_PC_RESET;
reg |= (state->flags & SS_IOCARD) ? I365_PC_IOCARD : 0;
i365_set(sock, I365_INTCTL, reg);
reg = I365_PWR_NORESET;
if (state->flags & SS_PWR_AUTO) reg |= I365_PWR_AUTO;
if (state->flags & SS_OUTPUT_ENA) reg |= I365_PWR_OUT;
if (t->flags & IS_CIRRUS) {
if (state->Vpp != 0) {
if (state->Vpp == 120)
reg |= I365_VPP1_12V;
else if (state->Vpp == state->Vcc)
reg |= I365_VPP1_5V;
else return -EINVAL;
}
if (state->Vcc != 0) {
reg |= I365_VCC_5V;
if (state->Vcc == 33)
i365_bset(sock, PD67_MISC_CTL_1, PD67_MC1_VCC_3V);
else if (state->Vcc == 50)
i365_bclr(sock, PD67_MISC_CTL_1, PD67_MC1_VCC_3V);
else return -EINVAL;
}
} else if (t->flags & IS_VG_PWR) {
if (state->Vpp != 0) {
if (state->Vpp == 120)
reg |= I365_VPP1_12V;
else if (state->Vpp == state->Vcc)
reg |= I365_VPP1_5V;
else return -EINVAL;
}
if (state->Vcc != 0) {
reg |= I365_VCC_5V;
if (state->Vcc == 33)
i365_bset(sock, VG469_VSELECT, VG469_VSEL_VCC);
else if (state->Vcc == 50)
i365_bclr(sock, VG469_VSELECT, VG469_VSEL_VCC);
else return -EINVAL;
}
} else if (t->flags & IS_DF_PWR) {
switch (state->Vcc) {
case 0: break;
case 33: reg |= I365_VCC_3V; break;
case 50: reg |= I365_VCC_5V; break;
default: return -EINVAL;
}
switch (state->Vpp) {
case 0: break;
case 50: reg |= I365_VPP1_5V; break;
case 120: reg |= I365_VPP1_12V; break;
default: return -EINVAL;
}
} else {
switch (state->Vcc) {
case 0: break;
case 50: reg |= I365_VCC_5V; break;
default: return -EINVAL;
}
switch (state->Vpp) {
case 0: break;
case 50: reg |= I365_VPP1_5V | I365_VPP2_5V; break;
case 120: reg |= I365_VPP1_12V | I365_VPP2_12V; break;
default: return -EINVAL;
}
}
if (reg != i365_get(sock, I365_POWER))
i365_set(sock, I365_POWER, reg);
/* Chipset-specific functions */
if (t->flags & IS_CIRRUS) {
/* Speaker control */
i365_bflip(sock, PD67_MISC_CTL_1, PD67_MC1_SPKR_ENA,
state->flags & SS_SPKR_ENA);
}
/* Card status change interrupt mask */
reg = t->cs_irq << 4;
if (state->csc_mask & SS_DETECT) reg |= I365_CSC_DETECT;
if (state->flags & SS_IOCARD) {
if (state->csc_mask & SS_STSCHG) reg |= I365_CSC_STSCHG;
} else {
if (state->csc_mask & SS_BATDEAD) reg |= I365_CSC_BVD1;
if (state->csc_mask & SS_BATWARN) reg |= I365_CSC_BVD2;
if (state->csc_mask & SS_READY) reg |= I365_CSC_READY;
}
i365_set(sock, I365_CSCINT, reg);
i365_get(sock, I365_CSC);
return 0;
} /* i365_set_socket */
/*====================================================================*/
static int i365_set_io_map(u_short sock, struct pccard_io_map *io)
{
u_char map, ioctl;
debug(1, "SetIOMap(%d, %d, %#2.2x, %d ns, "
"%#lx-%#lx)\n", sock, io->map, io->flags,
io->speed, io->start, io->stop);
map = io->map;
if ((map > 1) || (io->start > 0xffff) || (io->stop > 0xffff) ||
(io->stop < io->start)) return -EINVAL;
/* Turn off the window before changing anything */
if (i365_get(sock, I365_ADDRWIN) & I365_ENA_IO(map))
i365_bclr(sock, I365_ADDRWIN, I365_ENA_IO(map));
i365_set_pair(sock, I365_IO(map)+I365_W_START, io->start);
i365_set_pair(sock, I365_IO(map)+I365_W_STOP, io->stop);
ioctl = i365_get(sock, I365_IOCTL) & ~I365_IOCTL_MASK(map);
if (io->speed) ioctl |= I365_IOCTL_WAIT(map);
if (io->flags & MAP_0WS) ioctl |= I365_IOCTL_0WS(map);
if (io->flags & MAP_16BIT) ioctl |= I365_IOCTL_16BIT(map);
if (io->flags & MAP_AUTOSZ) ioctl |= I365_IOCTL_IOCS16(map);
i365_set(sock, I365_IOCTL, ioctl);
/* Turn on the window if necessary */
if (io->flags & MAP_ACTIVE)
i365_bset(sock, I365_ADDRWIN, I365_ENA_IO(map));
return 0;
} /* i365_set_io_map */
/*====================================================================*/
static int i365_set_mem_map(u_short sock, struct pccard_mem_map *mem)
{
u_short base, i;
u_char map;
debug(1, "SetMemMap(%d, %d, %#2.2x, %d ns, %#llx-%#llx, "
"%#x)\n", sock, mem->map, mem->flags, mem->speed,
(unsigned long long)mem->res->start,
(unsigned long long)mem->res->end, mem->card_start);
map = mem->map;
if ((map > 4) || (mem->card_start > 0x3ffffff) ||
(mem->res->start > mem->res->end) || (mem->speed > 1000))
return -EINVAL;
if ((mem->res->start > 0xffffff) || (mem->res->end > 0xffffff))
return -EINVAL;
/* Turn off the window before changing anything */
if (i365_get(sock, I365_ADDRWIN) & I365_ENA_MEM(map))
i365_bclr(sock, I365_ADDRWIN, I365_ENA_MEM(map));
base = I365_MEM(map);
i = (mem->res->start >> 12) & 0x0fff;
if (mem->flags & MAP_16BIT) i |= I365_MEM_16BIT;
if (mem->flags & MAP_0WS) i |= I365_MEM_0WS;
i365_set_pair(sock, base+I365_W_START, i);
i = (mem->res->end >> 12) & 0x0fff;
switch (to_cycles(mem->speed)) {
case 0: break;
case 1: i |= I365_MEM_WS0; break;
case 2: i |= I365_MEM_WS1; break;
default: i |= I365_MEM_WS1 | I365_MEM_WS0; break;
}
i365_set_pair(sock, base+I365_W_STOP, i);
i = ((mem->card_start - mem->res->start) >> 12) & 0x3fff;
if (mem->flags & MAP_WRPROT) i |= I365_MEM_WRPROT;
if (mem->flags & MAP_ATTRIB) i |= I365_MEM_REG;
i365_set_pair(sock, base+I365_W_OFF, i);
/* Turn on the window if necessary */
if (mem->flags & MAP_ACTIVE)
i365_bset(sock, I365_ADDRWIN, I365_ENA_MEM(map));
return 0;
} /* i365_set_mem_map */
#if 0 /* driver model ordering issue */
/*======================================================================
Routines for accessing socket information and register dumps via
/sys/class/pcmcia_socket/...
======================================================================*/
static ssize_t show_info(struct class_device *class_dev, char *buf)
{
struct i82365_socket *s = container_of(class_dev, struct i82365_socket, socket.dev);
return sprintf(buf, "type: %s\npsock: %d\n",
pcic[s->type].name, s->psock);
}
static ssize_t show_exca(struct class_device *class_dev, char *buf)
{
struct i82365_socket *s = container_of(class_dev, struct i82365_socket, socket.dev);
unsigned short sock;
int i;
ssize_t ret = 0;
unsigned long flags = 0;
sock = s->number;
ISA_LOCK(sock, flags);
for (i = 0; i < 0x40; i += 4) {
ret += sprintf(buf, "%02x %02x %02x %02x%s",
i365_get(sock,i), i365_get(sock,i+1),
i365_get(sock,i+2), i365_get(sock,i+3),
((i % 16) == 12) ? "\n" : " ");
buf += ret;
}
ISA_UNLOCK(sock, flags);
return ret;
}
static CLASS_DEVICE_ATTR(exca, S_IRUGO, show_exca, NULL);
static CLASS_DEVICE_ATTR(info, S_IRUGO, show_info, NULL);
#endif
/*====================================================================*/
/* this is horribly ugly... proper locking needs to be done here at
* some time... */
#define LOCKED(x) do { \
int retval; \
unsigned long flags; \
spin_lock_irqsave(&isa_lock, flags); \
retval = x; \
spin_unlock_irqrestore(&isa_lock, flags); \
return retval; \
} while (0)
static int pcic_get_status(struct pcmcia_socket *s, u_int *value)
{
unsigned int sock = container_of(s, struct i82365_socket, socket)->number;
if (socket[sock].flags & IS_ALIVE) {
*value = 0;
return -EINVAL;
}
LOCKED(i365_get_status(sock, value));
}
static int pcic_set_socket(struct pcmcia_socket *s, socket_state_t *state)
{
unsigned int sock = container_of(s, struct i82365_socket, socket)->number;
if (socket[sock].flags & IS_ALIVE)
return -EINVAL;
LOCKED(i365_set_socket(sock, state));
}
static int pcic_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
{
unsigned int sock = container_of(s, struct i82365_socket, socket)->number;
if (socket[sock].flags & IS_ALIVE)
return -EINVAL;
LOCKED(i365_set_io_map(sock, io));
}
static int pcic_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *mem)
{
unsigned int sock = container_of(s, struct i82365_socket, socket)->number;
if (socket[sock].flags & IS_ALIVE)
return -EINVAL;
LOCKED(i365_set_mem_map(sock, mem));
}
static int pcic_init(struct pcmcia_socket *s)
{
int i;
struct resource res = { .start = 0, .end = 0x1000 };
pccard_io_map io = { 0, 0, 0, 0, 1 };
pccard_mem_map mem = { .res = &res, };
for (i = 0; i < 2; i++) {
io.map = i;
pcic_set_io_map(s, &io);
}
for (i = 0; i < 5; i++) {
mem.map = i;
pcic_set_mem_map(s, &mem);
}
return 0;
}
static struct pccard_operations pcic_operations = {
.init = pcic_init,
.get_status = pcic_get_status,
.set_socket = pcic_set_socket,
.set_io_map = pcic_set_io_map,
.set_mem_map = pcic_set_mem_map,
};
/*====================================================================*/
static struct device_driver i82365_driver = {
.name = "i82365",
.bus = &platform_bus_type,
.suspend = pcmcia_socket_dev_suspend,
.resume = pcmcia_socket_dev_resume,
};
static struct platform_device *i82365_device;
static int __init init_i82365(void)
{
int i, ret;
ret = driver_register(&i82365_driver);
if (ret)
return ret;
i82365_device = platform_device_alloc("i82365", 0);
if (i82365_device) {
ret = platform_device_add(i82365_device);
if (ret)
platform_device_put(i82365_device);
} else
ret = -ENOMEM;
if (ret) {
driver_unregister(&i82365_driver);
return ret;
}
printk(KERN_INFO "Intel ISA PCIC probe: ");
sockets = 0;
isa_probe();
if (sockets == 0) {
printk("not found.\n");
platform_device_unregister(i82365_device);
release_region(i365_base, 2);
driver_unregister(&i82365_driver);
return -ENODEV;
}
/* Set up interrupt handler(s) */
if (grab_irq != 0)
request_irq(cs_irq, pcic_interrupt, 0, "i82365", pcic_interrupt);
/* register sockets with the pcmcia core */
for (i = 0; i < sockets; i++) {
socket[i].socket.dev.dev = &i82365_device->dev;
socket[i].socket.ops = &pcic_operations;
socket[i].socket.resource_ops = &pccard_nonstatic_ops;
socket[i].socket.owner = THIS_MODULE;
socket[i].number = i;
ret = pcmcia_register_socket(&socket[i].socket);
if (!ret)
socket[i].flags |= IS_REGISTERED;
#if 0 /* driver model ordering issue */
class_device_create_file(&socket[i].socket.dev,
&class_device_attr_info);
class_device_create_file(&socket[i].socket.dev,
&class_device_attr_exca);
#endif
}
/* Finally, schedule a polling interrupt */
if (poll_interval != 0) {
poll_timer.function = pcic_interrupt_wrapper;
poll_timer.data = 0;
init_timer(&poll_timer);
poll_timer.expires = jiffies + poll_interval;
add_timer(&poll_timer);
}
return 0;
} /* init_i82365 */
static void __exit exit_i82365(void)
{
int i;
for (i = 0; i < sockets; i++) {
if (socket[i].flags & IS_REGISTERED)
pcmcia_unregister_socket(&socket[i].socket);
}
platform_device_unregister(i82365_device);
if (poll_interval != 0)
del_timer_sync(&poll_timer);
if (grab_irq != 0)
free_irq(cs_irq, pcic_interrupt);
for (i = 0; i < sockets; i++) {
/* Turn off all interrupt sources! */
i365_set(i, I365_CSCINT, 0);
release_region(socket[i].ioaddr, 2);
}
release_region(i365_base, 2);
#ifdef CONFIG_PNP
if (i82365_pnpdev)
pnp_disable_dev(i82365_pnpdev);
#endif
driver_unregister(&i82365_driver);
} /* exit_i82365 */
module_init(init_i82365);
module_exit(exit_i82365);
MODULE_LICENSE("Dual MPL/GPL");
/*====================================================================*/
Reference in New Issue View Git Blame Copy Permalink