Commit 90f346a7 authored by Russell King's avatar Russell King

[PCMCIA] Add Cirrus PD6729 PCMCIA bridge support.

Patch from Komuro, cleaned up by Russell King.
parent 66cafce6
......@@ -69,6 +69,13 @@ config CARDBUS
depends on YENTA
default y if YENTA
config PD6729
tristate "Cirrus PD6729 compatible bridge support"
depends on PCMCIA && PCI
help
This provides support for the Cirrus PD6729 PCI-to-PCMCIA bridge
device, found in some older laptops and PCMCIA card readers.
config I82092
tristate "i82092 compatible bridge support"
depends on PCMCIA && PCI
......
......@@ -9,6 +9,7 @@ endif
obj-$(CONFIG_PCMCIA) += pcmcia_core.o ds.o
obj-$(CONFIG_YENTA) += yenta_socket.o
obj-$(CONFIG_PD6729) += pd6729.o
obj-$(CONFIG_I82365) += i82365.o
obj-$(CONFIG_I82092) += i82092.o
obj-$(CONFIG_TCIC) += tcic.o
......
/*
* 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/config.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <pcmcia/cs.h>
#include <asm/system.h>
#include <asm/io.h>
#include "pd6729.h"
#include "i82365.h"
#include "cirrus.h"
MODULE_LICENSE("GPL");
#define MAX_SOCKETS 2
/* simple helper functions */
/* External clock time, in nanoseconds. 120 ns = 8.33 MHz */
#define to_cycles(ns) ((ns)/120)
static spinlock_t port_lock = SPIN_LOCK_UNLOCKED;
/* 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 pt_regs *regs)
{
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;
dprintk("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 set_bridge_state(struct pd6729_socket *socket)
{
indirect_write(socket, I365_GBLCTL, 0x00);
indirect_write(socket, I365_GENCTL, 0x00);
indirect_setbit(socket, I365_INTCTL, 0x08);
}
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_get_socket(struct pcmcia_socket *sock, socket_state_t *state)
{
struct pd6729_socket *socket = container_of(sock, struct pd6729_socket, socket);
unsigned char reg, vcc, vpp;
state->flags = 0;
state->Vcc = 0;
state->Vpp = 0;
state->io_irq = 0;
state->csc_mask = 0;
/* First the power status of the socket */
/* PCTRL - Power Control Register */
reg = indirect_read(socket, I365_POWER);
if (reg & I365_PWR_AUTO)
state->flags |= SS_PWR_AUTO; /* Automatic Power Switch */
if (reg & I365_PWR_OUT)
state->flags |= SS_OUTPUT_ENA; /* Output signals are enabled */
vcc = reg & I365_VCC_MASK; vpp = reg & I365_VPP1_MASK;
if (reg & I365_VCC_5V) {
state->Vcc = (indirect_read(socket, PD67_MISC_CTL_1) &
PD67_MC1_VCC_3V) ? 33 : 50;
if (vpp == I365_VPP1_5V) {
if (state->Vcc == 50)
state->Vpp = 50;
else
state->Vpp = 33;
}
if (vpp == I365_VPP1_12V)
state->Vpp = 120;
}
/* Now the IO card, RESET flags and IO interrupt */
/* IGENC, Interrupt and General Control */
reg = indirect_read(socket, I365_INTCTL);
if ((reg & I365_PC_RESET) == 0)
state->flags |= SS_RESET;
if (reg & I365_PC_IOCARD)
state->flags |= SS_IOCARD; /* This is an IO card */
/* Set the IRQ number */
state->io_irq = socket->socket.pci_irq;
/* Card status change */
/* CSCICR, Card Status Change Interrupt Configuration */
reg = indirect_read(socket, I365_CSCINT);
if (reg & I365_CSC_DETECT)
state->csc_mask |= SS_DETECT; /* Card detect is enabled */
if (state->flags & SS_IOCARD) {/* IO Cards behave different */
if (reg & I365_CSC_STSCHG)
state->csc_mask |= SS_STSCHG;
} else {
if (reg & I365_CSC_BVD1)
state->csc_mask |= SS_BATDEAD;
if (reg & I365_CSC_BVD2)
state->csc_mask |= SS_BATWARN;
if (reg & I365_CSC_READY)
state->csc_mask |= SS_READY;
}
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;
/* First, set the global controller options */
set_bridge_state(socket);
/* Values for the IGENC register */
reg = 0;
/* The reset bit has "inverse" logic */
if (!(state->flags & SS_RESET))
reg = reg | I365_PC_RESET;
if (state->flags & SS_IOCARD)
reg = 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) {
dprintk("Auto power\n");
reg |= I365_PWR_AUTO; /* automatic power mngmnt */
}
if (state->flags & SS_OUTPUT_ENA) {
dprintk("Power Enabled\n");
reg |= I365_PWR_OUT; /* enable power */
}
switch (state->Vcc) {
case 0:
break;
case 33:
dprintk("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:
dprintk("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:
dprintk("pd6729: pd6729_set_socket called with invalid VCC power value: %i\n",
state->Vcc);
return -EINVAL;
}
switch (state->Vpp) {
case 0:
dprintk("not setting Vpp on socket %i\n", socket->number);
break;
case 33:
case 50:
dprintk("setting Vpp to Vcc for socket %i\n", socket->number);
reg |= I365_VPP1_5V;
break;
case 120:
dprintk("setting Vpp to 12.0\n");
reg |= I365_VPP1_12V;
break;
default:
dprintk("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);
/* Now, specifiy that all interrupts are to be done as PCI interrupts */
indirect_write(socket, PD67_EXT_INDEX, PD67_EXT_CTL_1);
indirect_write(socket, PD67_EXT_DATA, PD67_EC1_INV_MGMT_IRQ | PD67_EC1_INV_CARD_IRQ);
/* 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;
}
reg |= 0x30; /* management IRQ: PCI INTA# = "irq 3" */
indirect_write(socket, I365_CSCINT, reg);
reg = indirect_read(socket, I365_INTCTL);
reg |= 0x03; /* card IRQ: PCI INTA# = "irq 3" */
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) {
dprintk("pd6729_set_io_map with invalid map");
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));
/* dprintk("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) {
printk("pd6729_set_mem_map: invalid map");
return -EINVAL;
}
if ((mem->sys_start > mem->sys_stop) || (mem->speed > 1000)) {
printk("pd6729_set_mem_map: invalid address / speed");
/* printk("invalid mem map for socket %i : %lx to %lx with a start of %x\n",
sock, mem->sys_start, mem->sys_stop, mem->card_start); */
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->sys_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->sys_stop >> 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->sys_start >> 24);
/* card start */
i = ((mem->card_start - mem->sys_start) >> 12) & 0x3fff;
if (mem->flags & MAP_WRPROT)
i |= I365_MEM_WRPROT;
if (mem->flags & MAP_ATTRIB) {
/* dprintk("requesting attribute memory for socket %i\n",
socket->number);*/
i |= I365_MEM_REG;
} else {
/* dprintk("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_suspend(struct pcmcia_socket *sock)
{
return pd6729_set_socket(sock, &dead_socket);
}
static int pd6729_init(struct pcmcia_socket *sock)
{
int i;
pccard_io_map io = { 0, 0, 0, 0, 1 };
pccard_mem_map mem = { 0, 0, 0, 0, 0, 0 };
mem.sys_stop = 0x0fff;
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,
.suspend = pd6729_suspend,
.get_status = pd6729_get_status,
.get_socket = pd6729_get_socket,
.set_socket = pd6729_set_socket,
.set_io_map = pd6729_set_io_map,
.set_mem_map = pd6729_set_mem_map,
};
static int __devinit pd6729_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
int i, j, ret;
char configbyte;
struct pd6729_socket *socket;
socket = kmalloc(sizeof(struct pd6729_socket) * MAX_SOCKETS, GFP_KERNEL);
if (!socket)
return -ENOMEM;
memset(socket, 0, sizeof(struct pd6729_socket) * MAX_SOCKETS);
if ((ret = pci_enable_device(dev)))
goto err_out_free_mem;
printk(KERN_INFO "pd6729: Cirrus PD6729 PCI to PCMCIA Bridge at 0x%lx on irq %d\n",
pci_resource_start(dev, 0), dev->irq);
printk(KERN_INFO "pd6729: configured as a %d socket device.\n", MAX_SOCKETS);
/* Since we have no memory BARs some firmware we may not
have had PCI_COMMAND_MEM enabled, yet the device needs
it. */
pci_read_config_byte(dev, PCI_COMMAND, &configbyte);
if (!(configbyte & PCI_COMMAND_MEMORY)) {
printk(KERN_DEBUG "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) {
printk(KERN_INFO "pd6729: pci request region failed.\n");
goto err_out_disable;
}
for (i = 0; i < MAX_SOCKETS; i++) {
socket[i].io_base = pci_resource_start(dev, 0);
socket[i].socket.features |= SS_CAP_PCCARD;
socket[i].socket.map_size = 0x1000;
socket[i].socket.irq_mask = 0;
socket[i].socket.pci_irq = dev->irq;
socket[i].socket.owner = THIS_MODULE;
socket[i].number = i;
socket[i].socket.ops = &pd6729_operations;
socket[i].socket.dev.dev = &dev->dev;
socket[i].socket.driver_data = &socket[i];
}
pci_set_drvdata(dev, socket);
/* Register the interrupt handler */
if ((ret = request_irq(dev->irq, pd6729_interrupt, SA_SHIRQ, "pd6729", socket))) {
printk(KERN_ERR "pd6729: Failed to register irq %d, aborting\n", dev->irq);
goto err_out_free_res;
}
for (i = 0; i < MAX_SOCKETS; i++) {
ret = pcmcia_register_socket(&socket[i].socket);
if (ret) {
printk(KERN_INFO "pd6729: 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:
free_irq(dev->irq, socket);
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++)
pcmcia_unregister_socket(&socket[i].socket);
free_irq(dev->irq, socket);
pci_release_regions(dev);
pci_disable_device(dev);
kfree(socket);
}
static int pd6729_socket_suspend(struct pci_dev *dev, u32 state)
{
return pcmcia_socket_dev_suspend(&dev->dev, state);
}
static int pd6729_socket_resume(struct pci_dev *dev)
{
return pcmcia_socket_dev_resume(&dev->dev);
}
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_drv = {
.name = "pd6729",
.id_table = pd6729_pci_ids,
.probe = pd6729_pci_probe,
.remove = __devexit_p(pd6729_pci_remove),
.suspend = pd6729_socket_suspend,
.resume = pd6729_socket_resume,
};
static int pd6729_module_init(void)
{
return pci_module_init(&pd6729_pci_drv);
}
static void pd6729_module_exit(void)
{
pci_unregister_driver(&pd6729_pci_drv);
}
module_init(pd6729_module_init);
module_exit(pd6729_module_exit);
#ifndef _INCLUDE_GUARD_PD6729_H_
#define _INCLUDE_GUARD_PD6729_H_
/* Debuging defines */
#ifdef NOTRACE
#define dprintk(fmt, args...) printk(fmt , ## args)
#else
#define dprintk(fmt, args...) do {} while (0)
#endif
/* Flags for I365_GENCTL */
#define I365_DF_VS1 0x40 /* DF-step Voltage Sense */
#define I365_DF_VS2 0x80
/* Fields in PD67_EXTERN_DATA */
#define PD67_EXD_VS1(s) (0x01 << ((s) << 1))
#define PD67_EXD_VS2(s) (0x02 << ((s) << 1))
struct pd6729_socket {
int number;
unsigned long io_base; /* base io address of the socket */
struct pcmcia_socket socket;
};
#endif
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