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sdhci: support JMicron JMB38x chips 

The JMicron JMB38x chip doesn't support transfers that aren't 32-bit
aligned (both size and start address). It also doesn't like switching
between PIO and DMA mode, so it needs to be reset after each request.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Pierre Ossman 2007-12-02 19:58:16 +01:00
parent c9fddbc4f8
commit 84c46a53fc
2 changed files with 19 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/mmc/host/sdhci.c
View File

@ -7,6 +7,10 @@
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* Thanks to the following companies for their support:
*
* - JMicron (hardware and technical support)
*/
#include <linux/delay.h>
@ -47,6 +51,8 @@ static unsigned int debug_quirks = 0;
#define SDHCI_QUIRK_32BIT_DMA_ADDR (1<<6)
/* Controller can only DMA chunk sizes that are a multiple of 32 bits */
#define SDHCI_QUIRK_32BIT_DMA_SIZE (1<<7)
/* Controller needs to be reset after each request to stay stable */
#define SDHCI_QUIRK_RESET_AFTER_REQUEST (1<<8)
static const struct pci_device_id pci_ids[] __devinitdata = {
{
@ -111,6 +117,16 @@ static const struct pci_device_id pci_ids[] __devinitdata = {
SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS,
},
{
.vendor = PCI_VENDOR_ID_JMICRON,
.device = PCI_DEVICE_ID_JMICRON_JMB38X_SD,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = SDHCI_QUIRK_32BIT_DMA_ADDR |
SDHCI_QUIRK_32BIT_DMA_SIZE |
SDHCI_QUIRK_RESET_AFTER_REQUEST,
},
{ /* Generic SD host controller */
PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
},
@ -922,7 +938,8 @@ static void sdhci_tasklet_finish(unsigned long param)
*/
if (mrq->cmd->error ||
(mrq->data && (mrq->data->error ||
(mrq->data->stop && mrq->data->stop->error)))) {
(mrq->data->stop && mrq->data->stop->error))) ||
(host->chip->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST)) {
/* Some controllers need this kick or reset won't work here */
if (host->chip->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) {

1
include/linux/pci_ids.h
View File

@ -2148,6 +2148,7 @@
#define PCI_DEVICE_ID_JMICRON_JMB365 0x2365
#define PCI_DEVICE_ID_JMICRON_JMB366 0x2366
#define PCI_DEVICE_ID_JMICRON_JMB368 0x2368
#define PCI_DEVICE_ID_JMICRON_JMB38X_SD 0x2381
#define PCI_VENDOR_ID_KORENIX 0x1982
#define PCI_DEVICE_ID_KORENIX_JETCARDF0 0x1600