- 根目录:
- drivers
- pcmcia
- pd6729.c
/*
* Driver for the Cirrus PD6729 PCI-PCMCIA bridge.
*
* Based on the i82092.c driver.
*
* This software may be used and distributed according to the terms of
* the GNU General Public License, incorporated herein by reference.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/io.h>
#include <pcmcia/ss.h>
#include <asm/system.h>
#include "pd6729.h"
#include "i82365.h"
#include "cirrus.h"
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Driver for the Cirrus PD6729 PCI-PCMCIA bridge");
MODULE_AUTHOR("Jun Komuro <komurojun-mbn@nifty.com>");
#define MAX_SOCKETS 2
/*
* simple helper functions
* External clock time, in nanoseconds. 120 ns = 8.33 MHz
*/
#define to_cycles(ns) ((ns)/120)
#ifndef NO_IRQ
#define NO_IRQ ((unsigned int)(0))
#endif
/*
* PARAMETERS
* irq_mode=n
* Specifies the interrupt delivery mode. The default (1) is to use PCI
* interrupts; a value of 0 selects ISA interrupts. This must be set for
* correct operation of PCI card readers.
*/
static int irq_mode = 1; /* 0 = ISA interrupt, 1 = PCI interrupt */
module_param(irq_mode, int, 0444);
MODULE_PARM_DESC(irq_mode,
"interrupt delivery mode. 0 = ISA, 1 = PCI. default is 1");
static DEFINE_SPINLOCK(port_lock);
/* basic value read/write functions */
static unsigned char indirect_read(struct pd6729_socket *socket,
unsigned short reg)
{
unsigned long port;
unsigned char val;
unsigned long flags;
spin_lock_irqsave(&port_lock, flags);
reg += socket->number * 0x40;
port = socket->io_base;
outb(reg, port);
val = inb(port + 1);
spin_unlock_irqrestore(&port_lock, flags);
return val;
}
static unsigned short indirect_read16(struct pd6729_socket *socket,
unsigned short reg)
{
unsigned long port;
unsigned short tmp;
unsigned long flags;
spin_lock_irqsave(&port_lock, flags);
reg = reg + socket->number * 0x40;
port = socket->io_base;
outb(reg, port);
tmp = inb(port + 1);
reg++;
outb(reg, port);
tmp = tmp | (inb(port + 1) << 8);
spin_unlock_irqrestore(&port_lock, flags);
return tmp;
}
static void indirect_write(struct pd6729_socket *socket, unsigned short reg,
unsigned char value)
{
unsigned long port;
unsigned long flags;
spin_lock_irqsave(&port_lock, flags);
reg = reg + socket->number * 0x40;
port = socket->io_base;
outb(reg, port);
outb(value, port + 1);
spin_unlock_irqrestore(&port_lock, flags);
}
static void indirect_setbit(struct pd6729_socket *socket, unsigned short reg,
unsigned char mask)
{
unsigned long port;
unsigned char val;
unsigned long flags;
spin_lock_irqsave(&port_lock, flags);
reg = reg + socket->number * 0x40;
port = socket->io_base;
outb(reg, port);
val = inb(port + 1);
val |= mask;
outb(reg, port);
outb(val, port + 1);
spin_unlock_irqrestore(&port_lock, flags);
}
static void indirect_resetbit(struct pd6729_socket *socket, unsigned short reg,
unsigned char mask)
{
unsigned long port;
unsigned char val;
unsigned long flags;
spin_lock_irqsave(&port_lock, flags);
reg = reg + socket->number * 0x40;
port = socket->io_base;
outb(reg, port);
val = inb(port + 1);
val &= ~mask;
outb(reg, port);
outb(val, port + 1);
spin_unlock_irqrestore(&port_lock, flags);
}
static void indirect_write16(struct pd6729_socket *socket, unsigned short reg,
unsigned short value)
{
unsigned long port;
unsigned char val;
unsigned long flags;
spin_lock_irqsave(&port_lock, flags);
reg = reg + socket->number * 0x40;
port = socket->io_base;
outb(reg, port);
val = value & 255;
outb(val, port + 1);
reg++;
outb(reg, port);
val = value >> 8;
outb(val, port + 1);
spin_unlock_irqrestore(&port_lock, flags);
}
/* Interrupt handler functionality */
static irqreturn_t pd6729_interrupt(int irq, void *dev)
{
struct pd6729_socket *socket = (struct pd6729_socket *)dev;
int i;
int loopcount = 0;
int handled = 0;
unsigned int events, active = 0;
while (1) {
loopcount++;
if (loopcount > 20) {
printk(KERN_ERR "pd6729: infinite eventloop "
"in interrupt\n");
break;
}
active = 0;
for (i = 0; i < MAX_SOCKETS; i++) {
unsigned int csc;
/* card status change register */
csc = indirect_read(&socket[i], I365_CSC);
if (csc == 0) /* no events on this socket */
continue;
handled = 1;
events = 0;
if (csc & I365_CSC_DETECT) {
events |= SS_DETECT;
dev_vdbg(&socket[i].socket.dev,
"Card detected in socket %i!\n", i);
}
if (indirect_read(&socket[i], I365_INTCTL)
& I365_PC_IOCARD) {
/* For IO/CARDS, bit 0 means "read the card" */
events |= (csc & I365_CSC_STSCHG)
? SS_STSCHG : 0;
} else {
/* Check for battery/ready events */
events |= (csc & I365_CSC_BVD1)
? SS_BATDEAD : 0;
events |= (csc & I365_CSC_BVD2)
? SS_BATWARN : 0;
events |= (csc & I365_CSC_READY)
? SS_READY : 0;
}
if (events)
pcmcia_parse_events(&socket[i].socket, events);
active |= events;
}
if (active == 0) /* no more events to handle */
break;
}
return IRQ_RETVAL(handled);
}
/* socket functions */
static void pd6729_interrupt_wrapper(unsigned long data)
{
struct pd6729_socket *socket = (struct pd6729_socket *) data;
pd6729_interrupt(0, (void *)socket);
mod_timer(&socket->poll_timer, jiffies + HZ);
}
static int pd6729_get_status(struct pcmcia_socket *sock, u_int *value)
{
struct pd6729_socket *socket
= container_of(sock, struct pd6729_socket, socket);
unsigned int status;
unsigned int data;
struct pd6729_socket *t;
/* Interface Status Register */
status = indirect_read(socket, I365_STATUS);
*value = 0;
if ((status & I365_CS_DETECT) == I365_CS_DETECT)
*value |= SS_DETECT;
/*
* IO cards have a different meaning of bits 0,1
* Also notice the inverse-logic on the bits
*/
if (indirect_read(socket, I365_INTCTL) & I365_PC_IOCARD) {
/* IO card */
if (!(status & I365_CS_STSCHG))
*value |= SS_STSCHG;
} else {
/* non I/O card */
if (!(status & I365_CS_BVD1))
*value |= SS_BATDEAD;
if (!(status & I365_CS_BVD2))
*value |= SS_BATWARN;
}
if (status & I365_CS_WRPROT)
*value |= SS_WRPROT; /* card is write protected */
if (status & I365_CS_READY)
*value |= SS_READY; /* card is not busy */
if (status & I365_CS_POWERON)
*value |= SS_POWERON; /* power is applied to the card */
t = (socket->number) ? socket : socket + 1;
indirect_write(t, PD67_EXT_INDEX, PD67_EXTERN_DATA);
data = indirect_read16(t, PD67_EXT_DATA);
*value |= (data & PD67_EXD_VS1(socket->number)) ? 0 : SS_3VCARD;
return 0;
}
static int pd6729_set_socket(struct pcmcia_socket *sock, socket_state_t *state)
{
struct pd6729_socket *socket
= container_of(sock, struct pd6729_socket, socket);
unsigned char reg, data;
/* First, set the global controller options */
indirect_write(socket, I365_GBLCTL, 0x00);
indirect_write(socket, I365_GENCTL, 0x00);
/* Values for the IGENC register */
socket->card_irq = state->io_irq;
reg = 0;
/* The reset bit has "inverse" logic */
if (!(state->flags & SS_RESET))
reg |= I365_PC_RESET;
if (state->flags & SS_IOCARD)
reg |= I365_PC_IOCARD;
/* IGENC, Interrupt and General Control Register */
indirect_write(socket, I365_INTCTL, reg);
/* Power registers */
reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */
if (state->flags & SS_PWR_AUTO) {
dev_dbg(&sock->dev, "Auto power\n");
reg |= I365_PWR_AUTO; /* automatic power mngmnt */
}
if (state->flags & SS_OUTPUT_ENA) {
dev_dbg(&sock->dev, "Power Enabled\n");
reg |= I365_PWR_OUT; /* enable power */
}
switch (state->Vcc) {
case 0:
break;
case 33:
dev_dbg(&sock->dev,
"setting voltage to Vcc to 3.3V on socket %i\n",
socket->number);
reg |= I365_VCC_5V;
indirect_setbit(socket, PD67_MISC_CTL_1, PD67_MC1_VCC_3V);
break;
case 50:
dev_dbg(&sock->dev,
"setting voltage to Vcc to 5V on socket %i\n",
socket->number);
reg |= I365_VCC_5V;
indirect_resetbit(socket, PD67_MISC_CTL_1, PD67_MC1_VCC_3V);
break;
default:
dev_dbg(&sock->dev,
"pd6729_set_socket called with invalid VCC power "
"value: %i\n", state->Vcc);
return -EINVAL;
}
switch (state->Vpp) {
case 0:
dev_dbg(&sock->dev, "not setting Vpp on socket %i\n",
socket->number);
break;
case 33:
case 50:
dev_dbg(&sock->dev, "setting Vpp to Vcc for socket %i\n",
socket->number);
reg |= I365_VPP1_5V;
break;
case 120:
dev_dbg(&sock->dev, "setting Vpp to 12.0\n");
reg |= I365_VPP1_12V;
break;
default:
dev_dbg(&sock->dev, "pd6729: pd6729_set_socket called with "
"invalid VPP power value: %i\n", state->Vpp);
return -EINVAL;
}
/* only write if changed */
if (reg != indirect_read(socket, I365_POWER))
indirect_write(socket, I365_POWER, reg);
if (irq_mode == 1) {
/* all interrupts are to be done as PCI interrupts */
data = PD67_EC1_INV_MGMT_IRQ | PD67_EC1_INV_CARD_IRQ;
} else
data = 0;
indirect_write(socket, PD67_EXT_INDEX, PD67_EXT_CTL_1);
indirect_write(socket, PD67_EXT_DATA, data);
/* Enable specific interrupt events */
reg = 0x00;
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;
}
if (irq_mode == 1)
reg |= 0x30; /* management IRQ: PCI INTA# = "irq 3" */
indirect_write(socket, I365_CSCINT, reg);
reg = indirect_read(socket, I365_INTCTL);
if (irq_mode == 1)
reg |= 0x03; /* card IRQ: PCI INTA# = "irq 3" */
else
reg |= socket->card_irq;
indirect_write(socket, I365_INTCTL, reg);
/* now clear the (probably bogus) pending stuff by doing a dummy read */
(void)indirect_read(socket, I365_CSC);
return 0;
}
static int pd6729_set_io_map(struct pcmcia_socket *sock,
struct pccard_io_map *io)
{
struct pd6729_socket *socket
= container_of(sock, struct pd6729_socket, socket);
unsigned char map, ioctl;
map = io->map;
/* Check error conditions */
if (map > 1) {
dev_dbg(&sock->dev, "pd6729_set_io_map with invalid map\n");
return -EINVAL;
}
/* Turn off the window before changing anything */
if (indirect_read(socket, I365_ADDRWIN) & I365_ENA_IO(map))
indirect_resetbit(socket, I365_ADDRWIN, I365_ENA_IO(map));
/* dev_dbg(&sock->dev, "set_io_map: Setting range to %x - %x\n",
io->start, io->stop);*/
/* write the new values */
indirect_write16(socket, I365_IO(map)+I365_W_START, io->start);
indirect_write16(socket, I365_IO(map)+I365_W_STOP, io->stop);
ioctl = indirect_read(socket, I365_IOCTL) & ~I365_IOCTL_MASK(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);
indirect_write(socket, I365_IOCTL, ioctl);
/* Turn the window back on if needed */
if (io->flags & MAP_ACTIVE)
indirect_setbit(socket, I365_ADDRWIN, I365_ENA_IO(map));
return 0;
}
static int pd6729_set_mem_map(struct pcmcia_socket *sock,
struct pccard_mem_map *mem)
{
struct pd6729_socket *socket
= container_of(sock, struct pd6729_socket, socket);
unsigned short base, i;
unsigned char map;
map = mem->map;
if (map > 4) {
dev_warn(&sock->dev, "invalid map requested\n");
return -EINVAL;
}
if ((mem->res->start > mem->res->end) || (mem->speed > 1000)) {
dev_warn(&sock->dev, "invalid invalid address / speed\n");
return -EINVAL;
}
/* Turn off the window before changing anything */
if (indirect_read(socket, I365_ADDRWIN) & I365_ENA_MEM(map))
indirect_resetbit(socket, I365_ADDRWIN, I365_ENA_MEM(map));
/* write the start address */
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;
indirect_write16(socket, base + I365_W_START, i);
/* write the stop address */
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;
}
indirect_write16(socket, base + I365_W_STOP, i);
/* Take care of high byte */
indirect_write(socket, PD67_EXT_INDEX, PD67_MEM_PAGE(map));
indirect_write(socket, PD67_EXT_DATA, mem->res->start >> 24);
/* card start */
i = ((mem->card_start - mem->res->start) >> 12) & 0x3fff;
if (mem->flags & MAP_WRPROT)
i |= I365_MEM_WRPROT;
if (mem->flags & MAP_ATTRIB) {
/* dev_dbg(&sock->dev, "requesting attribute memory for "
"socket %i\n", socket->number);*/
i |= I365_MEM_REG;
} else {
/* dev_dbg(&sock->dev, "requesting normal memory for "
"socket %i\n", socket->number);*/
}
indirect_write16(socket, base + I365_W_OFF, i);
/* Enable the window if necessary */
if (mem->flags & MAP_ACTIVE)
indirect_setbit(socket, I365_ADDRWIN, I365_ENA_MEM(map));
return 0;
}
static int pd6729_init(struct pcmcia_socket *sock)
{
int i;
struct resource res = { .end = 0x0fff };
pccard_io_map io = { 0, 0, 0, 0, 1 };
pccard_mem_map mem = { .res = &res, };
pd6729_set_socket(sock, &dead_socket);
for (i = 0; i < 2; i++) {
io.map = i;
pd6729_set_io_map(sock, &io);
}
for (i = 0; i < 5; i++) {
mem.map = i;
pd6729_set_mem_map(sock, &mem);
}
return 0;
}
/* the pccard structure and its functions */
static struct pccard_operations pd6729_operations = {
.init = pd6729_init,
.get_status = pd6729_get_status,
.set_socket = pd6729_set_socket,
.set_io_map = pd6729_set_io_map,
.set_mem_map = pd6729_set_mem_map,
};
static irqreturn_t pd6729_test(int irq, void *dev)
{
pr_devel("-> hit on irq %d\n", irq);
return IRQ_HANDLED;
}
static int pd6729_check_irq(int irq)
{
int ret;
ret = request_irq(irq, pd6729_test, IRQF_PROBE_SHARED, "x",
pd6729_test);
if (ret)
return -1;
free_irq(irq, pd6729_test);
return 0;
}
static u_int __devinit pd6729_isa_scan(void)
{
u_int mask0, mask = 0;
int i;
if (irq_mode == 1) {
printk(KERN_INFO "pd6729: PCI card interrupts, "
"PCI status changes\n");
return 0;
}
mask0 = PD67_MASK;
/* just find interrupts that aren't in use */
for (i = 0; i < 16; i++)
if ((mask0 & (1 << i)) && (pd6729_check_irq(i) == 0))
mask |= (1 << i);
printk(KERN_INFO "pd6729: ISA irqs = ");
for (i = 0; i < 16; i++)
if (mask & (1<<i))
printk("%s%d", ((mask & ((1<<i)-1)) ? "," : ""), i);
if (mask == 0)
printk("none!");
else
printk(" polling status changes.\n");
return mask;
}
static int __devinit pd6729_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
int i, j, ret;
u_int mask;
char configbyte;
struct pd6729_socket *socket;
socket = kzalloc(sizeof(struct pd6729_socket) * MAX_SOCKETS,
GFP_KERNEL);
if (!socket) {
dev_warn(&dev->dev, "failed to kzalloc socket.\n");
return -ENOMEM;
}
ret = pci_enable_device(dev);
if (ret) {
dev_warn(&dev->dev, "failed to enable pci_device.\n");
goto err_out_free_mem;
}
if (!pci_resource_start(dev, 0)) {
dev_warn(&dev->dev, "refusing to load the driver as the "
"io_base is NULL.\n");
goto err_out_disable;
}
dev_info(&dev->dev, "Cirrus PD6729 PCI to PCMCIA Bridge at 0x%llx "
"on irq %d\n",
(unsigned long long)pci_resource_start(dev, 0), dev->irq);
/*
* Since we have no memory BARs some firmware may not
* have had PCI_COMMAND_MEMORY enabled, yet the device needs it.
*/
pci_read_config_byte(dev, PCI_COMMAND, &configbyte);
if (!(configbyte & PCI_COMMAND_MEMORY)) {
dev_dbg(&dev->dev, "pd6729: Enabling PCI_COMMAND_MEMORY.\n");
configbyte |= PCI_COMMAND_MEMORY;
pci_write_config_byte(dev, PCI_COMMAND, configbyte);
}
ret = pci_request_regions(dev, "pd6729");
if (ret) {
dev_warn(&dev->dev, "pci request region failed.\n");
goto err_out_disable;
}
if (dev->irq == NO_IRQ)
irq_mode = 0; /* fall back to ISA interrupt mode */
mask = pd6729_isa_scan();
if (irq_mode == 0 && mask == 0) {
dev_warn(&dev->dev, "no ISA interrupt is available.\n");
goto err_out_free_res;
}
for (i = 0; i < MAX_SOCKETS; i++) {
socket[i].io_base = pci_resource_start(dev, 0);
socket[i].socket.features |= SS_CAP_PAGE_REGS | SS_CAP_PCCARD;
socket[i].socket.map_size = 0x1000;
socket[i].socket.irq_mask = mask;
socket[i].socket.pci_irq = dev->irq;
socket[i].socket.cb_dev = dev;
socket[i].socket.owner = THIS_MODULE;
socket[i].number = i;
socket[i].socket.ops = &pd6729_operations;
socket[i].socket.resource_ops = &pccard_nonstatic_ops;
socket[i].socket.dev.parent = &dev->dev;
socket[i].socket.driver_data = &socket[i];
}
pci_set_drvdata(dev, socket);
if (irq_mode == 1) {
/* Register the interrupt handler */
ret = request_irq(dev->irq, pd6729_interrupt, IRQF_SHARED,
"pd6729", socket);
if (ret) {
dev_err(&dev->dev, "Failed to register irq %d\n",
dev->irq);
goto err_out_free_res;
}
} else {
/* poll Card status change */
init_timer(&socket->poll_timer);
socket->poll_timer.function = pd6729_interrupt_wrapper;
socket->poll_timer.data = (unsigned long)socket;
socket->poll_timer.expires = jiffies + HZ;
add_timer(&socket->poll_timer);
}
for (i = 0; i < MAX_SOCKETS; i++) {
ret = pcmcia_register_socket(&socket[i].socket);
if (ret) {
dev_warn(&dev->dev, "pcmcia_register_socket failed.\n");
for (j = 0; j < i ; j++)
pcmcia_unregister_socket(&socket[j].socket);
goto err_out_free_res2;
}
}
return 0;
err_out_free_res2:
if (irq_mode == 1)
free_irq(dev->irq, socket);
else
del_timer_sync(&socket->poll_timer);
err_out_free_res:
pci_release_regions(dev);
err_out_disable:
pci_disable_device(dev);
err_out_free_mem:
kfree(socket);
return ret;
}
static void __devexit pd6729_pci_remove(struct pci_dev *dev)
{
int i;
struct pd6729_socket *socket = pci_get_drvdata(dev);
for (i = 0; i < MAX_SOCKETS; i++) {
/* Turn off all interrupt sources */
indirect_write(&socket[i], I365_CSCINT, 0);
indirect_write(&socket[i], I365_INTCTL, 0);
pcmcia_unregister_socket(&socket[i].socket);
}
if (irq_mode == 1)
free_irq(dev->irq, socket);
else
del_timer_sync(&socket->poll_timer);
pci_release_regions(dev);
pci_disable_device(dev);
kfree(socket);
}
static struct pci_device_id pd6729_pci_ids[] = {
{
.vendor = PCI_VENDOR_ID_CIRRUS,
.device = PCI_DEVICE_ID_CIRRUS_6729,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{ }
};
MODULE_DEVICE_TABLE(pci, pd6729_pci_ids);
static struct pci_driver pd6729_pci_driver = {
.name = "pd6729",
.id_table = pd6729_pci_ids,
.probe = pd6729_pci_probe,
.remove = __devexit_p(pd6729_pci_remove),
};
static int pd6729_module_init(void)
{
return pci_register_driver(&pd6729_pci_driver);
}
static void pd6729_module_exit(void)
{
pci_unregister_driver(&pd6729_pci_driver);
}
module_init(pd6729_module_init);
module_exit(pd6729_module_exit);