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Re: HP Jornada 6xx PCMCIA driver
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From: Kristoffer E. <kri...@gm...> - 2007-11-23 19:39:31
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On Mon, 19 Nov 2007 23:25:47 +0100
Dominik Brodowski <li...@do...> wrote:
> Hi,
>
> On Mon, Nov 19, 2007 at 08:49:12PM +0100, Kristoffer Ericson wrote:
> > On Mon, 19 Nov 2007 09:49:41 +0100
> > Dominik Brodowski <li...@do...> wrote:
> >
> > > Hi,
> > >
> > > On Mon, Nov 19, 2007 at 01:19:00AM -0800, Kristoffer Ericson wrote:
> > > > > Actually, why do you bother? The PCMCIA subsystem is capable of working with
> > > > > shared IRQs...
> > > > >
> > > > So I should have same interrupt for both? Isn't it important to know
> > > > where the IRQ came from? Thats what puzzles me.
> > >
> > > Well, each IRQ handler needs to check whether it is indeed the one which was
> > > called. So, inside hd6441_interrupt() you'd need to do the following
> > >
> > > cscr = inb(cscr_reg);
> > > if !(cscr & HD64461_PCCCSCR_IRQ)
> > > return IRQ_NONE;
> > >
> > > to avoid handling ("IRQ_HANDLED") an interrupt which wasn't caused by this
> > > device.
> > >
> > Oki, sounds logical. But do I need to setup io_irq "IRQ's" or does PCMCIA code register one for me? From what I've read so far
> > I believe I need to register the "slot IRQ" and handler, while pcmcia setups the pcmcia_card handler. Correct?
>
> Correct.
>
Well, for some reason the pcmcia subsystem isn't installing any irq handler for the pcmcia_card handler. So Im getting "IRQ 78: nobody cared" messages. The only pcmcia_... function my driver calls is pcmcia_register_socket.
Best way to bugtrack why?.. The only respons I get on dmesg is :
"<7>cs: : pcmcia_register_socket(0x8d2fac5c)"
And when I insert card, it freezes for about 2 seconds then gives me the kernel message "<3>irq 78: nobody cared (try booting with the "irqpoll" option).
Best wishes
Kristoffer
>
> Dominik
/*
* drivers/pcmcia/hd64461_ss.c
*
* PCMCIA platform driver for Hitachi HD64461 companion chip
* Copyright (C) 2006-2007 Kristoffer Ericson <kri...@gm...>
*
* This driver is based on hd64461_ss.c that was maintained in LinuxSH cvs before merger with mainline
* by
* COPYRIGHT (C) 2002-2005 Andriy Skulysh <ask...@im...>
* COPYRIGHT (C) ? Greg Banks <gb...@po...>
* COPYRIGHT (C) 2000 YAEGASHI Takeshi
*
* Please note that although the hd64461 chipset supports two sockets (0 & 1) this driver only
* supports the PCMCIA one. The CF slot cannot handle anything other than memory cards, so its
* better to leave support for that on libata.
*
*/
#include <linux/autoconf.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/ss.h>
#include <pcmcia/bulkmem.h>
#include <pcmcia/cistpl.h>
#include "cs_internal.h"
#include <asm/io.h>
#include <asm/hd64461.h>
#include <asm/hp6xx.h>
#define MODNAME "HD64461_ss"
/*
*
* Our socket implementation
**************************************/
typedef struct hd64461_socket_t {
u8 cscier;
unsigned int irq;
unsigned long mem_base;
socket_state_t state;
pccard_mem_map mem_maps[MAX_WIN];
unsigned char IC_memory;
struct pcmcia_socket socket;
} hd64461_socket_t;
/* socket declaration */
static hd64461_socket_t hd64461_sockets[CONFIG_HD64461_PCMCIA_SOCKETS];
/*
* hd64461_set_voltage(int Vcc, int Vpp)
*
* returns : %1 on success (no error checking!)
*/
static int hd64461_set_voltage(int Vcc, int Vpp)
{
u8 gcr, scr;
u16 stbcr;
u32 gcr_reg = HD64461_PCC0GCR;
u32 scr_reg = HD64461_PCC0SCR;
gcr = inb(gcr_reg);
scr = inb(scr_reg);
/* Handling voltage control pins */
switch (Vcc) {
case 0:
gcr |= HD64461_PCCGCR_VCC0;
scr |= HD64461_PCCSCR_VCC1;
break;
case 33:
gcr |= HD64461_PCCGCR_VCC0;
scr &= ~HD64461_PCCSCR_VCC1;
break;
case 50:
gcr &= ~HD64461_PCCGCR_VCC0;
scr &= ~HD64461_PCCSCR_VCC1;
break;
}
outb(gcr, gcr_reg);
outb(scr, scr_reg);
stbcr = inw(HD64461_STBCR);
if (Vcc > 0) {
stbcr &= ~HD64461_STBCR_SPC0ST;
} else {
stbcr |= HD64461_STBCR_SPC0ST;
}
outw(stbcr, HD64461_STBCR);
return 1;
}
static int hd64461_init(struct pcmcia_socket *s)
{
u16 gpadr;
hd64461_socket_t *sp = container_of(s, struct hd64461_socket_t, socket);
printk(KERN_INFO "Entering hd64461_init from pcmcia_register_socket\n");
sp->state.Vcc = 0;
sp->state.Vpp = 0;
hd64461_set_voltage(0, 0);
gpadr = inw(HD64461_GPADR);
gpadr &= ~HD64461_GPADR_PCMCIA0;
outw(gpadr, HD64461_GPADR);
return 0;
}
static int hd64461_suspend(struct pcmcia_socket *s)
{
u16 gpadr;
u8 gcr;
u32 gcr_reg = HD64461_PCC0GCR;
gcr = inb(gcr_reg);
gcr &= ~HD64461_PCCGCR_DRVE;
outb(gcr, gcr_reg);
hd64461_set_voltage(0, 0);
gpadr = inw(HD64461_GPADR);
gpadr |= HD64461_GPADR_PCMCIA0;
outw(gpadr, HD64461_GPADR);
return 0;
}
/*
* hd64461_get_status(struct pcmcia_socket *s, u32 * value)
*
*
*/
static int hd64461_get_status(struct pcmcia_socket *s, u32 * value)
{
u8 isr;
u32 status = 0;
hd64461_socket_t *sp = container_of(s, struct hd64461_socket_t, socket);
/* get status of pcmcia socket */
isr = inb(HD64461_PCC0ISR);
printk(KERN_INFO "hd64461_get_status: reading HD64461_PCC0ISR status %d\n", isr);
/* is card inserted and powerd? */
if ((isr & HD64461_PCCISR_PCD_MASK) == 0) {
status |= SS_DETECT;
/* If its an memory card, lets find out the voltage */
if (sp->IC_memory) {
switch (isr & HD64461_PCCISR_BVD_MASK) {
case HD64461_PCCISR_BVD_BATGOOD:
break;
case HD64461_PCCISR_BVD_BATWARN:
status |= SS_BATWARN;
break;
default:
status |= SS_BATDEAD;
break;
}
if (isr & HD64461_PCCISR_READY)
status |= SS_READY;
if (isr & HD64461_PCCISR_MWP)
status |= SS_WRPROT;
} else {
if (isr & HD64461_PCCISR_BVD1)
status |= SS_STSCHG;
}
switch (isr & (HD64461_PCCISR_VS2 | HD64461_PCCISR_VS1)) {
case HD64461_PCCISR_VS1:
printk(KERN_INFO MODNAME
": cannot handle X.XV card, ignored\n");
status = 0;
break;
case 0:
case HD64461_PCCISR_VS2:
status |= SS_3VCARD;
break;
case HD64461_PCCISR_VS2 | HD64461_PCCISR_VS1:
break;
}
if ((sp->state.Vcc != 0) || (sp->state.Vpp != 0))
status |= SS_POWERON;
}
*value = status;
return 0;
}
static int hd64461_set_socket(struct pcmcia_socket *s, socket_state_t * state)
{
u32 flags;
u32 changed;
u8 gcr, cscier;
hd64461_socket_t *sp = container_of(s, struct hd64461_socket_t, socket);
u32 gcr_reg = HD64461_PCC0GCR;
u32 cscier_reg = HD64461_PCC0CSCIER;
printk(KERN_INFO "hd64461: entering hd64461_set_socket\n");
/* no interruptions please */
local_irq_save(flags);
/* compair old power status with new */
if (state->Vpp != sp->state.Vpp || state->Vcc != sp->state.Vcc) {
if (!hd64461_set_voltage(state->Vcc, state->Vpp)) {
local_irq_restore(flags);
printk(KERN_INFO "hd64461_set_socket: We've produced an EINVAL\n");
return -EINVAL;
}
}
/* lets only push the changes */
changed = sp->state.csc_mask ^ state->csc_mask;
cscier = inb(cscier_reg);
/* set it so interrupt occurs when values of CD1 and CD2 are changed */
if (changed & SS_DETECT) {
if (state->csc_mask & SS_DETECT)
cscier |= HD64461_PCCCSCIER_CDE;
else
cscier &= ~HD64461_PCCCSCIER_CDE;
}
/* set so interrupt occurs when pin changes from low -> high */
if (changed & SS_READY) {
if (state->csc_mask & SS_READY)
cscier |= HD64461_PCCCSCIER_RE;
else
cscier &= ~HD64461_PCCCSCIER_RE;
}
/* set so interrupt occurs when BVD1 & BVD2 are set to bat_dead */
if (changed & SS_BATDEAD) {
if (state->csc_mask & SS_BATDEAD)
cscier |= HD64461_PCCCSCIER_BDE;
else
cscier &= ~HD64461_PCCCSCIER_BDE;
}
/* set so interrupt occurs when BVD1 & BVD2 are set to bat_warn */
if (changed & SS_BATWARN) {
if (state->csc_mask & SS_BATWARN)
cscier |= HD64461_PCCCSCIER_BWE;
else
cscier &= ~HD64461_PCCCSCIER_BWE;
}
/* set so "pccard connection" interrupt initializes PCC0SCR and PCC0GCR */
if (changed & SS_STSCHG) {
if (state->csc_mask & SS_STSCHG)
cscier |= HD64461_PCCCSCIER_SCE;
else
cscier &= ~HD64461_PCCCSCIER_SCE;
}
outb(cscier, cscier_reg);
changed = sp->state.flags ^ state->flags;
gcr = inb(gcr_reg);
if (changed & SS_IOCARD) {
if (state->flags & SS_IOCARD) {
if (s->sock == 1) {
printk(KERN_INFO
"socket 1 can be only IC Memory card\n");
} else {
/* Reset the card and set as IO card */
printk(KERN_INFO "hd64461_set_socket: Lets reset and set to IO card \n");
gcr |= HD64461_PCCGCR_PCCT;
sp->IC_memory = 0;
}
} else {
/* Reset and set as memory card */
gcr &= ~HD64461_PCCGCR_PCCT;
sp->IC_memory = 1;
}
}
/* if bit 3 = 0 while pccard accessed, output 1 on pccreg */
if (changed & SS_RESET) {
if (state->flags & SS_RESET)
gcr |= HD64461_PCCGCR_PCCR;
else
gcr &= ~HD64461_PCCGCR_PCCR;
}
/* Set low level of external buffer */
if (changed & SS_OUTPUT_ENA) {
if (state->flags & SS_OUTPUT_ENA)
gcr |= HD64461_PCCGCR_DRVE;
else
gcr &= ~HD64461_PCCGCR_DRVE;
}
outb(gcr, gcr_reg);
sp->state = *state;
/* enable interruptions */
local_irq_restore(flags);
printk(KERN_INFO "hd64461_set_socket: We've passed the routine successfully\n");
return 0;
}
static int hd64461_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
{
/* this is not needed due to static mappings */
return 0;
}
static int hd64461_set_mem_map(struct pcmcia_socket *s,
struct pccard_mem_map *mem)
{
hd64461_socket_t *sp = container_of(s, struct hd64461_socket_t, socket);
struct pccard_mem_map *smem;
int map = mem->map;
unsigned long saddr;
printk(KERN_INFO "hd64461: entering hd64461_set_mem_map\n");
if (map >= MAX_WIN)
return -EINVAL;
/* lets setup pointers to memory */
smem = &sp->mem_maps[map];
saddr = sp->mem_base + mem->card_start;
if (!(mem->flags & MAP_ATTRIB))
saddr += HD64461_PCC_WINDOW;
mem->static_start = saddr;
*smem = *mem;
return 0;
}
/*
*
* functions needed for operations
**************************************/
static struct pccard_operations hd64461_operations = {
.init = hd64461_init,
.suspend = hd64461_suspend,
.get_status = hd64461_get_status,
.set_socket = hd64461_set_socket,
.set_io_map = hd64461_set_io_map,
.set_mem_map = hd64461_set_mem_map,
};
/* hd64461_interrupt()
*
* Here we check what caused the interrupt and
* pass it on to pcmcia parser
*
***************************************/
static irqreturn_t hd64461_interrupt(int irq, void *dev)
{
hd64461_socket_t *sp = (hd64461_socket_t *) dev;
unsigned events = 0;
unsigned char cscr;
cscr = inb(HD64461_PCC0CSCR);
/*
* Just because we know pcmcia_card_irq is generating interrupt doesn't
* mean that the slot interrupt isn't also active. So make damn sure before passing on IRQ.
*/
if (cscr & HD64461_PCCCSCR_IREQ) {
if (!(cscr & HD64461_PCCCSCR_SC)) {
cscr &= ~HD64461_PCCCSCR_IREQ;
/* silence interrupt source and hand over interrupt */
outb(cscr, HD64461_PCC0CSCR);
//printk(KERN_INFO "HD64461_SS: Interrupt caused by pcmcia card\n");
return IRQ_NONE;
}
}
printk(KERN_INFO "HD64461_SS: Interrupt caused by Slot 0\n");
/* if both CD1 and CD2 has changed */
if (cscr & HD64461_PCCCSCR_CDC) {
/* silence it by writing a 0 to bit 3 */
cscr &= ~HD64461_PCCCSCR_CDC;
/* we've detected something being inserted or unplugged */
events |= SS_DETECT;
/* if CD1 and CD2 don't both display 1, we need to clean up */
if (((inb(HD64461_PCC0ISR)) & HD64461_PCCISR_PCD_MASK) != 0) {
cscr &= ~(HD64461_PCCCSCR_RC | HD64461_PCCCSCR_BW |
HD64461_PCCCSCR_BD | HD64461_PCCCSCR_SC);
}
}
/* MEMORY CARD */
if (sp->IC_memory) {
if (cscr & HD64461_PCCCSCR_RC) {
/* ? */
cscr &= ~HD64461_PCCCSCR_RC;
events |= SS_READY;
}
if (cscr & HD64461_PCCCSCR_BW) {
/* battery warning */
cscr &= ~HD64461_PCCCSCR_BW;
events |= SS_BATWARN;
}
if (cscr & HD64461_PCCCSCR_BD) {
/* battery dead */
cscr &= ~HD64461_PCCCSCR_BD;
events |= SS_BATDEAD;
}
} else { /* IO CARD */
if (cscr & HD64461_PCCCSCR_SC) {
/* status changed */
cscr &= ~HD64461_PCCCSCR_SC;
events |= SS_STSCHG;
}
}
outb(cscr, HD64461_PCC0CSCR);
/* make sure we push these changes into pcmcia events */
if (events) {
pcmcia_parse_events(&sp->socket, events);
printk(KERN_INFO "hd64461_interrupt: we are pushing changed events!\n");
}
return IRQ_HANDLED;
}
/*
*hd_64461_init_socket()
*
* Add values to socket and link it with pcmcia operations
*********************************************************/
int hd64461_init_socket(int sock, int irq, unsigned long mem_base,unsigned long io_offset)
{
hd64461_socket_t *sp = &hd64461_sockets[sock];
unsigned gcr_reg = HD64461_PCC0GCR;
u8 gcr;
int i, err;
outb(0, HD64461_PCC0CSCIER);
memset(sp, 0, sizeof(*sp));
sp->IC_memory = 1;
sp->irq = irq;
sp->mem_base = mem_base;
sp->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP | SS_CAP_PAGE_REGS;
sp->socket.resource_ops = &pccard_static_ops;
sp->socket.map_size = HD64461_PCC_WINDOW; /* 16MB fixed window size */
sp->socket.pci_irq = irq;
sp->socket.io_offset = 0;
sp->socket.owner = THIS_MODULE;
sp->socket.ops = &hd64461_operations;
for (i = 0; i != MAX_WIN; i++)
sp->mem_maps[i].map = i;
if ((request_irq(irq, hd64461_interrupt, IRQF_SHARED, "hd64461_ss-irq", sp)) < 0) {
printk(KERN_INFO "hd64461_init: request for irq %d: failed\n", sp->irq);
return -1;
}
gcr = inb(gcr_reg);
/* continuous 16MB memory and 16MB I/O space */
gcr |= HD64461_PCCGCR_PMMOD;
/* output to pin 25 and 24 when common memory is accessed */
gcr &= ~(HD64461_PCCGCR_PA25 | HD64461_PCCGCR_PA24);
outb(gcr, gcr_reg);
return 0;
}
void hd64461_exit_socket(int sock)
{
hd64461_socket_t *sp = &hd64461_sockets[sock];
unsigned cscier_reg = HD64461_PCC0CSCIER;
printk(KERN_INFO "hd64461_exit_socket: cleaning up irq %d and %d\n", sp->irq, sp->socket.pci_irq);
outb(0, cscier_reg);
hd64461_suspend(&sp->socket);
}
static int __devexit hd64461_pcmcia_drv_remove(struct platform_device *dev)
{
/* Libpata handles CF slot, so we only handle PCMCIA slot */
pcmcia_unregister_socket(&hd64461_sockets[0].socket);
hd64461_exit_socket(0);
return 0;
}
#ifdef CONFIG_PM
static int hd64461_pcmcia_drv_suspend(struct platform_device *dev, pm_message_t state)
{
int ret = 0;
int i;
u32 cscier_reg = HD64461_PCC0CSCIER;
hd64461_sockets[0].cscier = inb(cscier_reg);
outb(0, cscier_reg);
ret = pcmcia_socket_dev_suspend(&dev->dev, state);
return ret;
}
static int hd64461_pcmcia_drv_resume(struct platform_device *dev)
{
int ret = 0;
int i;
u32 cscier_reg = HD64461_PCC0CSCIER;
outb(hd64461_sockets[0].cscier, cscier_reg);
ret = pcmcia_socket_dev_resume(&dev->dev);
return ret;
}
#endif
static struct platform_driver hd64461_pcmcia_driver = {
.remove = __devexit_p(hd64461_pcmcia_drv_remove),
#ifdef CONFIG_PM
.suspend = hd64461_pcmcia_drv_suspend,
.resume = hd64461_pcmcia_drv_resume,
#endif
.driver = {
.name = "hd64461-pcmcia",
},
};
static struct platform_device *hd64461_pcmcia_device;
static int __init init_hd64461_ss(void)
{
int i;
printk(KERN_INFO "hd64461_ss_init: pcmcia driver for hd64461 chipset started\n");
if (platform_driver_register(&hd64461_pcmcia_driver))
goto failed1;
/* HD64461_IRQ_PCC0 + 3 = 64 + 14 + 1 = 79 */
i = hd64461_init_socket(0, HD64461_IRQ_PCC0, HD64461_PCC0_BASE, 0x0a000000);
if (i < 0)
goto failed2;
printk(KERN_INFO "hd64461_ss_init: init_socket returned with %d\n",i);
hd64461_pcmcia_device = platform_device_alloc("hd64461-pcmcia",-1);
if(!hd64461_pcmcia_device) {
printk(KERN_INFO "hd64461_ss_init: Cannot find pcmcia device!\n");
return -ENODEV;
}
i = platform_device_add(hd64461_pcmcia_device);
if (i) {
platform_device_put(hd64461_pcmcia_device);
printk(KERN_INFO "hd64461_ss_init: Cannot add pcmcia device, return value %d\n",i);
return -ENODEV;
}
/* Lets register the pcmcia socket */
printk(KERN_INFO "hd64461_ss_init: setting socket device\n");
hd64461_sockets[0].socket.dev.parent = &hd64461_pcmcia_device->dev;
printk(KERN_INFO "hd64461_ss_init: registering socket hd64461_sockets[0].socket\n");
i = pcmcia_register_socket(&hd64461_sockets[0].socket);
printk(KERN_INFO "hd64461_ss_init: return value %d from pcmcia_register_socket\n", i);
return 0;
/* Unregister driver nothing else */
failed1:
printk(KERN_INFO "hd64461_ss_init: Failed registering pcmcia platform driver\n");
platform_driver_unregister(&hd64461_pcmcia_driver);
return -EINVAL;
/* Unregister driver nothing else */
failed2:
printk(KERN_INFO "hd64461_ss_init: Failed to startup socket 0\n");
platform_driver_unregister(&hd64461_pcmcia_driver);
return i;
}
static void __exit exit_hd64461_ss(void)
{
/* Only remove if there's something to remove */
if (hd64461_pcmcia_device) {
platform_device_unregister(hd64461_pcmcia_device);
platform_driver_unregister(&hd64461_pcmcia_driver);
}
}
module_init(init_hd64461_ss);
module_exit(exit_hd64461_ss);
MODULE_AUTHOR("Kristoffer Ericson <kri...@gm...>");
MODULE_DESCRIPTION("PCMCIA driver for Hitachi HD64461 companion chip");
MODULE_LICENSE("GPL");
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