Re: 2.6.22-rc: regression: no irda0 interface (2.6.21 was OK), smsc does not find chip

From: Bjorn Helgaas
Date: Tue Jun 19 2007 - 19:31:47 EST

On Saturday 16 June 2007 10:38:56 am Andrey Borzenkov wrote:
> it appears that quirk is not even applied because PnP tells us device is not
> active:
>
> [ 571.118483] pnp: PnP ACPI init
> [ 571.118611] ACPI: bus type pnp registered
> [ 571.158828] quirk_smc_enable: active = 0
> [ 571.182090] pnp: PnP ACPI: found 12 devices

Yup. That could probably be improved.

_CRS definitely reports SIR and FIR backwards from most platforms.

I can make the device talk by configuring it "by hand," e.g.,

# cd /sys/bus/pnp/devices/00:0a
# echo "set io 0x2e8-0x2ef io 0x100-0x107 irq 5 dma 1" > resources
# echo activate > resources
# ~/smsc
smsc_dump: 0x24 0xfe UART1 config
smsc_dump: 0x25 0xba SIR base (0x2e8)
smsc_dump: 0x28 0x45 UART IRQ
smsc_dump: 0x2b 0x20 FIR base (0x100)
smsc_dump: 0x2c 0x01 FIR DMA
smsc_dump: 0x0c 0x0e IRDA mode
smsc_dump: 0x07 0x50 powerdown mode
smsc_dump: 0x0a 0x40 toshiba mystery
# ~/inb 0x100 8 0x100
selecting bank 3 (fir at 0x100)
0x0100: 0x10 0xb8 0xf2 0x00 0x51 0x00 0x00 0x03

("smsc" and "inb" are little test programs (attached). "smsc" dumps
the SIO configuration, and "inb" dumps I/O ports. In this case,
I'm looking at the FIR ports, and the values there are what smsc-ircc2
expects.)

Seems like it should be simple to do the same thing automatically
in the driver or a quirk, but I haven't been able to get that to work.

I'll be out of the office most of the time from now until July 5, but
I'll get back to this when I return.

Bjorn


P.S. "reboot" doesn't seem to work on my box. I tried "reboot=b",
"reboot=c", "reboot=h", and none of them seems to work. Does it work
on yours?
/*
* Dump SMSC/LPC47N227 config, typically IRDA config
*/


#include <stdio.h>
#include <stdlib.h>
#include <sys/io.h>

/******************************************
Keys. They should work with every SMsC SIO
******************************************/

#define SMSCSIO_CFGACCESSKEY 0x55
#define SMSCSIO_CFGEXITKEY 0xaa

/*****************************
* Generic SIO Flat (!?) *
*****************************/

/* Register 0x0d */
#define SMSCSIOFLAT_DEVICEID_REG 0x0d

/* Register 0x0c */
#define SMSCSIOFLAT_UARTMODE0C_REG 0x0c
#define SMSCSIOFLAT_UART2MODE_MASK 0x38
#define SMSCSIOFLAT_UART2MODE_VAL_COM 0x00
#define SMSCSIOFLAT_UART2MODE_VAL_IRDA 0x08
#define SMSCSIOFLAT_UART2MODE_VAL_ASKIR 0x10

/* Register 0x25 */
#define SMSCSIOFLAT_UART2BASEADDR_REG 0x25

/* Register 0x2b */
#define SMSCSIOFLAT_FIRBASEADDR_REG 0x2b

/* Register 0x2c */
#define SMSCSIOFLAT_FIRDMASELECT_REG 0x2c
#define SMSCSIOFLAT_FIRDMASELECT_MASK 0x0f

/* Register 0x28 */
#define SMSCSIOFLAT_UARTIRQSELECT_REG 0x28
#define SMSCSIOFLAT_UART2IRQSELECT_MASK 0x0f
#define SMSCSIOFLAT_UART1IRQSELECT_MASK 0xf0
#define SMSCSIOFLAT_UARTIRQSELECT_VAL_NONE 0x00


/*********************
* LPC47N227 *
*********************/

#define LPC47N227_CFGACCESSKEY 0x55
#define LPC47N227_CFGEXITKEY 0xaa

/* Register 0x00 */
#define LPC47N227_FDCPOWERVALIDCONF_REG 0x00
#define LPC47N227_FDCPOWER_MASK 0x08
#define LPC47N227_VALID_MASK 0x80

/* Register 0x02 */
#define LPC47N227_UART12POWER_REG 0x02
#define LPC47N227_UART1POWERDOWN_MASK 0x08
#define LPC47N227_UART2POWERDOWN_MASK 0x80

/* Register 0x07 */
#define LPC47N227_APMBOOTDRIVE_REG 0x07
#define LPC47N227_PARPORT2AUTOPWRDOWN_MASK 0x10 /* auto power down on if set */
#define LPC47N227_UART2AUTOPWRDOWN_MASK 0x20 /* auto power down on if set */
#define LPC47N227_UART1AUTOPWRDOWN_MASK 0x40 /* auto power down on if set */

/* Register 0x0c */
#define LPC47N227_UARTMODE0C_REG 0x0c
#define LPC47N227_UART2MODE_MASK 0x38
#define LPC47N227_UART2MODE_VAL_COM 0x00
#define LPC47N227_UART2MODE_VAL_IRDA 0x08
#define LPC47N227_UART2MODE_VAL_ASKIR 0x10

/* Register 0x0d */
#define LPC47N227_DEVICEID_REG 0x0d
#define LPC47N227_DEVICEID_DEFVAL 0x5a

/* Register 0x0e */
#define LPC47N227_REVISIONID_REG 0x0e

/* Register 0x25 */
#define LPC47N227_UART2BASEADDR_REG 0x25

/* Register 0x28 */
#define LPC47N227_UARTIRQSELECT_REG 0x28
#define LPC47N227_UART2IRQSELECT_MASK 0x0f
#define LPC47N227_UART1IRQSELECT_MASK 0xf0
#define LPC47N227_UARTIRQSELECT_VAL_NONE 0x00

/* Register 0x2b */
#define LPC47N227_FIRBASEADDR_REG 0x2b

/* Register 0x2c */
#define LPC47N227_FIRDMASELECT_REG 0x2c
#define LPC47N227_FIRDMASELECT_MASK 0x0f
#define LPC47N227_FIRDMASELECT_VAL_DMA1 0x01 /* 47n227 has three dma channels */
#define LPC47N227_FIRDMASELECT_VAL_DMA2 0x02
#define LPC47N227_FIRDMASELECT_VAL_DMA3 0x03
#define LPC47N227_FIRDMASELECT_VAL_NONE 0x0f

static inline unsigned int smsc_read(unsigned int port, unsigned int reg)
{
outb(reg, port);
return inb(port + 1);
}

static inline void smsc_write(unsigned int port, unsigned int reg, unsigned int
val)
{
outb(reg, port);
outb(val, port + 1);
}

static void smsc_dump(unsigned int iobase)
{
unsigned char val;

outb(LPC47N227_CFGACCESSKEY, iobase); // enter configuration state

val = smsc_read(iobase, 0x24);
printf("%s: 0x%02x 0x%02x UART1 config\n", __FUNCTION__, 0x24, val);

val = smsc_read(iobase, SMSCSIOFLAT_UART2BASEADDR_REG);
printf("%s: 0x%02x 0x%02x SIR base (0x%x)\n", __FUNCTION__, SMSCSIOFLAT_UART2BASEADDR_REG, val, val << 2);

val = smsc_read(iobase, SMSCSIOFLAT_UARTIRQSELECT_REG);
printf("%s: 0x%02x 0x%02x UART IRQ\n", __FUNCTION__, SMSCSIOFLAT_UARTIRQSELECT_REG, val);

val = smsc_read(iobase, SMSCSIOFLAT_FIRBASEADDR_REG);
printf("%s: 0x%02x 0x%02x FIR base (0x%x)\n", __FUNCTION__, SMSCSIOFLAT_FIRBASEADDR_REG, val, val << 3);

val = smsc_read(iobase, SMSCSIOFLAT_FIRDMASELECT_REG);
printf("%s: 0x%02x 0x%02x FIR DMA\n", __FUNCTION__, SMSCSIOFLAT_FIRDMASELECT_REG, val);

val = smsc_read(iobase, SMSCSIOFLAT_UARTMODE0C_REG);
printf("%s: 0x%02x 0x%02x IRDA mode\n", __FUNCTION__, SMSCSIOFLAT_UARTMODE0C_REG, val);

val = smsc_read(iobase, LPC47N227_APMBOOTDRIVE_REG);
printf("%s: 0x%02x 0x%02x powerdown mode\n", __FUNCTION__, LPC47N227_APMBOOTDRIVE_REG, val);

val = smsc_read(iobase, 0x0a);
printf("%s: 0x%02x 0x%02x toshiba mystery\n", __FUNCTION__, 0x0a, val);

outb(LPC47N227_CFGEXITKEY, iobase); // leave configuration state
}

main()
{
if (iopl(3) < 0) {
perror("iopl");
exit(-1);
}

/* see smsc-ircc2.c for typical addresses */
smsc_dump(0x2e);
exit(0);
}
#include <stdio.h>
#include <stdlib.h>
#include <sys/io.h>

main(int argc, char **argv)
{
int port, length, fir;
int val;
unsigned char bank;

if (argc < 3)
exit(-1);

port = strtoul(argv[1], NULL, 0);
length = strtoul(argv[2], NULL, 0);

if (iopl(3) < 0) {
perror("iopl");
exit(-1);
}

if (argc > 3) {
fir = strtoul(argv[3], NULL, 0);
printf("selecting bank 3 (fir at 0x%x)\n", fir);
bank = inb(fir + 7);
bank &= 0xf0;
bank |= 3;
outb(bank, fir + 7);
}

while (length--) {
val = inb(port);
if ((port & 0x7) == 0)
printf("0x%04x:", port);
printf(" 0x%02x", val & 0xff);
if ((port & 0x7) == 0x7)
printf("\n");
port++;
}

exit(0);
}