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ssb: Fix pcicore cardbus mode

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This fixes the pcicore driver to not die a horrible
crash death when inserting a cardbus card.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Buesch 2008-02-19 17:46:48 +01:00 committed by John W. Linville
parent 53521d8c90
commit 7cb4461520
4 changed files with 39 additions and 2 deletions
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28
drivers/ssb/driver_pcicore.c
View File

@ -11,6 +11,7 @@
#include <linux/ssb/ssb.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/ssb/ssb_embedded.h>
#include "ssb_private.h"
@ -27,6 +28,18 @@ void pcicore_write32(struct ssb_pcicore *pc, u16 offset, u32 value)
ssb_write32(pc->dev, offset, value);
}
static inline
u16 pcicore_read16(struct ssb_pcicore *pc, u16 offset)
{
return ssb_read16(pc->dev, offset);
}
static inline
void pcicore_write16(struct ssb_pcicore *pc, u16 offset, u16 value)
{
ssb_write16(pc->dev, offset, value);
}
/**************************************************
* Code for hostmode operation.
**************************************************/
@ -117,8 +130,10 @@ static u32 get_cfgspace_addr(struct ssb_pcicore *pc,
u32 addr = 0;
u32 tmp;
if (unlikely(pc->cardbusmode && dev > 1))
/* We do only have one cardbus device behind the bridge. */
if (pc->cardbusmode && (dev >= 1))
goto out;
if (bus == 0) {
/* Type 0 transaction */
if (unlikely(dev >= SSB_PCI_SLOT_MAX))
@ -318,7 +333,16 @@ static void ssb_pcicore_init_hostmode(struct ssb_pcicore *pc)
pcicore_write32(pc, SSB_PCICORE_ARBCTL, val);
udelay(1); /* Assertion time demanded by the PCI standard */
/*TODO cardbus mode */
if (pc->dev->bus->has_cardbus_slot) {
ssb_dprintk(KERN_INFO PFX "CardBus slot detected\n");
pc->cardbusmode = 1;
/* GPIO 1 resets the bridge */
ssb_gpio_out(pc->dev->bus, 1, 1);
ssb_gpio_outen(pc->dev->bus, 1, 1);
pcicore_write16(pc, SSB_PCICORE_SPROM(0),
pcicore_read16(pc, SSB_PCICORE_SPROM(0))
| 0x0400);
}
/* 64MB I/O window */
pcicore_write32(pc, SSB_PCICORE_SBTOPCI0,

1
drivers/ssb/main.c
View File

@ -557,6 +557,7 @@ static int ssb_fetch_invariants(struct ssb_bus *bus,
goto out;
memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
bus->has_cardbus_slot = iv.has_cardbus_slot;
out:
return err;
}

7
include/linux/ssb/ssb.h
View File

@ -282,6 +282,8 @@ struct ssb_bus {
struct ssb_boardinfo boardinfo;
/* Contents of the SPROM. */
struct ssb_sprom sprom;
/* If the board has a cardbus slot, this is set to true. */
bool has_cardbus_slot;
#ifdef CONFIG_SSB_EMBEDDED
/* Lock for GPIO register access. */
@ -299,8 +301,13 @@ struct ssb_bus {
/* The initialization-invariants. */
struct ssb_init_invariants {
/* Versioning information about the PCB. */
struct ssb_boardinfo boardinfo;
/* The SPROM information. That's either stored in an
* EEPROM or NVRAM on the board. */
struct ssb_sprom sprom;
/* If the board has a cardbus slot, this is set to true. */
bool has_cardbus_slot;
};
/* Type of function to fetch the invariants. */
typedef int (*ssb_invariants_func_t)(struct ssb_bus *bus,

5
include/linux/ssb/ssb_driver_pci.h
View File

@ -51,6 +51,11 @@
#define SSB_PCICORE_SBTOPCI1_MASK 0xFC000000
#define SSB_PCICORE_SBTOPCI2 0x0108 /* Backplane to PCI translation 2 (sbtopci2) */
#define SSB_PCICORE_SBTOPCI2_MASK 0xC0000000
#define SSB_PCICORE_PCICFG0 0x0400 /* PCI config space 0 (rev >= 8) */
#define SSB_PCICORE_PCICFG1 0x0500 /* PCI config space 1 (rev >= 8) */
#define SSB_PCICORE_PCICFG2 0x0600 /* PCI config space 2 (rev >= 8) */
#define SSB_PCICORE_PCICFG3 0x0700 /* PCI config space 3 (rev >= 8) */
#define SSB_PCICORE_SPROM(wordoffset) (0x0800 + ((wordoffset) * 2)) /* SPROM shadow area (72 bytes) */
/* SBtoPCIx */
#define SSB_PCICORE_SBTOPCI_MEM 0x00000000