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b43: Fix chip access validation for new devices 

This fixes chip access validation for newer devices
(4318 and up, I think)

This patch fixes probing of a PCMCIA based 4318 device.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Buesch 2007-12-22 21:56:30 +01:00 committed by David S. Miller
parent 9db1f6d725
commit f3dd3fcc2c
2 changed files with 30 additions and 15 deletions
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5
drivers/net/wireless/b43/b43.h
View File

@ -50,6 +50,9 @@
#define B43_MMIO_XMITSTAT_1 0x174
#define B43_MMIO_REV3PLUS_TSF_LOW 0x180 /* core rev >= 3 only */
#define B43_MMIO_REV3PLUS_TSF_HIGH 0x184 /* core rev >= 3 only */
#define B43_MMIO_TSF_CFP_REP 0x188
#define B43_MMIO_TSF_CFP_START 0x18C
#define B43_MMIO_TSF_CFP_MAXDUR 0x190
/* 32-bit DMA */
#define B43_MMIO_DMA32_BASE0 0x200
@ -88,6 +91,8 @@
#define B43_MMIO_RADIO_HWENABLED_LO 0x49A
#define B43_MMIO_GPIO_CONTROL 0x49C
#define B43_MMIO_GPIO_MASK 0x49E
#define B43_MMIO_TSF_CFP_START_LOW 0x604
#define B43_MMIO_TSF_CFP_START_HIGH 0x606
#define B43_MMIO_TSF_0 0x632 /* core rev < 3 only */
#define B43_MMIO_TSF_1 0x634 /* core rev < 3 only */
#define B43_MMIO_TSF_2 0x636 /* core rev < 3 only */

40
drivers/net/wireless/b43/main.c
View File

@ -2408,32 +2408,42 @@ static void b43_periodic_tasks_setup(struct b43_wldev *dev)
queue_delayed_work(dev->wl->hw->workqueue, work, 0);
}
/* Validate access to the chip (SHM) */
/* Check if communication with the device works correctly. */
static int b43_validate_chipaccess(struct b43_wldev *dev)
{
u32 value;
u32 shm_backup;
u32 v, backup;
shm_backup = b43_shm_read32(dev, B43_SHM_SHARED, 0);
b43_shm_write32(dev, B43_SHM_SHARED, 0, 0xAA5555AA);
if (b43_shm_read32(dev, B43_SHM_SHARED, 0) != 0xAA5555AA)
goto error;
backup = b43_shm_read32(dev, B43_SHM_SHARED, 0);
/* Check for read/write and endianness problems. */
b43_shm_write32(dev, B43_SHM_SHARED, 0, 0x55AAAA55);
if (b43_shm_read32(dev, B43_SHM_SHARED, 0) != 0x55AAAA55)
goto error;
b43_shm_write32(dev, B43_SHM_SHARED, 0, shm_backup);
value = b43_read32(dev, B43_MMIO_MACCTL);
if ((value | B43_MACCTL_GMODE) !=
(B43_MACCTL_GMODE | B43_MACCTL_IHR_ENABLED))
b43_shm_write32(dev, B43_SHM_SHARED, 0, 0xAA5555AA);
if (b43_shm_read32(dev, B43_SHM_SHARED, 0) != 0xAA5555AA)
goto error;
value = b43_read32(dev, B43_MMIO_GEN_IRQ_REASON);
if (value)
b43_shm_write32(dev, B43_SHM_SHARED, 0, backup);
if ((dev->dev->id.revision >= 3) && (dev->dev->id.revision <= 10)) {
/* The 32bit register shadows the two 16bit registers
* with update sideeffects. Validate this. */
b43_write16(dev, B43_MMIO_TSF_CFP_START, 0xAAAA);
b43_write32(dev, B43_MMIO_TSF_CFP_START, 0xCCCCBBBB);
if (b43_read16(dev, B43_MMIO_TSF_CFP_START_LOW) != 0xBBBB)
goto error;
if (b43_read16(dev, B43_MMIO_TSF_CFP_START_HIGH) != 0xCCCC)
goto error;
}
b43_write32(dev, B43_MMIO_TSF_CFP_START, 0);
v = b43_read32(dev, B43_MMIO_MACCTL);
v |= B43_MACCTL_GMODE;
if (v != (B43_MACCTL_GMODE | B43_MACCTL_IHR_ENABLED))
goto error;
return 0;
error:
error:
b43err(dev->wl, "Failed to validate the chipaccess\n");
return -ENODEV;
}