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Message-Id: <201312152019.31588.linux@rainbow-software.org>
Date: Sun, 15 Dec 2013 20:19:30 +0100
From: Ondrej Zary <linux@...nbow-software.org>
To: linux-mmc@...r.kernel.org
Cc: Kernel development list <linux-kernel@...r.kernel.org>
Subject: [PATCH] Re: Toshiba TC6371AF PCI SD card controller (SD TypA) driver
I've manged to fix the Richards' driver - it now compiles with 3.13-rc3 and
works - it reads&writes both SD and SDHC cards. See the (ugly) patch below.
It still needs a lot of work.
The chip on the board is T7L65XB (can be seen after removing keyboard).
diff --git a/drivers/mmc/host/toshsd.c b/drivers/mmc/host/toshsd.c
index 85bd5641..d7667f6 100644
--- a/drivers/mmc/host/toshsd.c
+++ b/drivers/mmc/host/toshsd.c
@@ -14,12 +14,14 @@
#include <linux/delay.h>
#include <linux/highmem.h>
+#include <linux/module.h>
#include <linux/pci.h>
#include <linux/scatterlist.h>
#include <linux/interrupt.h>
#include <linux/mmc/host.h>
-#include <linux/mmc/protocol.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sd.h>
#include "toshsd.h"
@@ -51,12 +53,6 @@ MODULE_DEVICE_TABLE(pci, pci_ids);
static int toshsd_init(struct toshsd_host *host);
static void
-toshsd_dumpregs(struct toshsd_host *host)
-{
- printk(KERN_DEBUG DRIVER_NAME "0x%08x\n", 0x00);
-}
-
-static void
toshsd_mmc_finish_request(struct toshsd_host *host)
{
struct mmc_request *mrq = host->mrq;
@@ -80,6 +76,7 @@ toshsd_mmc_data_transfer(unsigned long h)
{
struct toshsd_host *host = (struct toshsd_host *) h;
struct mmc_data *data = host->data;
+ void *sg_virt;
unsigned short *buf;
int count;
unsigned long flags;
@@ -88,10 +85,10 @@ toshsd_mmc_data_transfer(unsigned long h)
DBG("Spurious Data IRQ\n");
return;
}
-// spin_lock(&host->lock);
+ spin_lock_irqsave(&host->lock, flags);
- buf = kmap(host->sg_ptr->page);
- buf += host->sg_ptr->offset / 2 + host->sg_off / 2;
+ sg_virt = kmap_atomic(sg_page(host->sg_ptr)) + host->sg_ptr->offset;
+ buf = (unsigned short *)(sg_virt + host->sg_off);
/* Ensure we dont read more than one block. The chip will interrupt us
* When the next block is available.
@@ -101,8 +98,8 @@ toshsd_mmc_data_transfer(unsigned long h)
count = data->blksz;
}
- DBG("count: %08x, page: %p, offset: %08x flags %08x\n", count,
- host->sg_ptr->page, host->sg_off, data->flags);
+ DBG("count: %08x, offset: %08x flags %08x\n", count,
+ host->sg_off, data->flags);
host->sg_off += count;
@@ -123,15 +120,14 @@ toshsd_mmc_data_transfer(unsigned long h)
}
}
- flush_dcache_page(host->sg_ptr->page);
- kunmap(host->sg_ptr->page);
+ kunmap_atomic(sg_virt - host->sg_ptr->offset);
if (host->sg_off == host->sg_ptr->length) {
- host->sg_ptr++;
+ host->sg_ptr = sg_next(host->sg_ptr);
host->sg_off = 0;
--host->sg_len;
}
-// spin_unlock(&host->lock);
+ spin_unlock_irqrestore(&host->lock, flags);
return;
}
@@ -188,11 +184,11 @@ toshsd_mmc_cmd_irq(struct toshsd_host *host, unsigned int buffer_stat)
}
if (buffer_stat & SD_CTRL_BUFFERSTATUS_CMD_TIMEOUT) {
- cmd->error = MMC_ERR_TIMEOUT;
+ cmd->error = -ETIMEDOUT;
DBG("Timeout\n");
} else if ((buffer_stat & SD_CTRL_BUFFERSTATUS_CRC_ERROR)
&& (cmd->flags & MMC_RSP_CRC)) {
- cmd->error = MMC_ERR_BADCRC;
+ cmd->error = -EIO;
DBG("BadCRC\n");
} else if (buffer_stat & (SD_CTRL_BUFFERSTATUS_ILLEGAL_ACCESS
| SD_CTRL_BUFFERSTATUS_CMD_INDEX_ERROR
@@ -206,13 +202,13 @@ toshsd_mmc_cmd_irq(struct toshsd_host *host, unsigned int buffer_stat)
READ_TOSHSD(SD_CTRL_ErrorStatus0));
DBG("detail1 error status 0x%04x\n",
READ_TOSHSD(SD_CTRL_ErrorStatus1));
- cmd->error = MMC_ERR_FAILED;
+ cmd->error = -EIO;
}
DBG("Command IRQ complete %d %d %x\n", cmd->opcode, cmd->error,
cmd->flags);
- if (cmd->error == MMC_ERR_NONE) {
+ if (cmd->error == 0) {
switch (cmd->opcode) {
case SD_APP_SET_BUS_WIDTH:
if (cmd->arg == SD_BUS_WIDTH_4) {
@@ -258,7 +254,7 @@ toshsd_mmc_cmd_irq(struct toshsd_host *host, unsigned int buffer_stat)
/* If there is data to handle we enable data IRQs here, and we will
* ultimatley finish the request in the mmc_data_end_irq handler.*/
- if (host->data && (cmd->error == MMC_ERR_NONE)) {
+ if (host->data && (cmd->error == 0)) {
bmask = READ_TOSHSD(SD_CTRL_IntMaskBuffer);
if (host->data->flags & MMC_DATA_READ) {
@@ -297,7 +293,7 @@ toshsd_mmc_data_end_irq(struct toshsd_host *host)
return;
}
- if (data->error == MMC_ERR_NONE) {
+ if (data->error == 0) {
data->bytes_xfered = data->blocks * data->blksz;
} else {
data->bytes_xfered = 0;
@@ -342,17 +338,8 @@ toshsd_irq(int irq, void *dev_id)
// DBG("IRQ bstatus:%x bmask:%x cstatus:%x cmask:%x\n", bstatus, bmask, cstatus, cmask);
- if (!breg && !creg) {
- /* This occurs sometimes for no known reason. It doesn't hurt anything, so I don't print it. */
- spin_lock(&host->lock);
- WRITE_TOSHSD(SD_CTRL_IntMaskBuffer, bmask & ~breg);
- WRITE_TOSHSD(SD_CTRL_IntMaskCard, cmask & ~creg);
- spin_unlock(&host->lock);
-
- result = IRQ_NONE;
-
- goto out;
- }
+ if (!breg && !creg)
+ return IRQ_NONE;
while (breg || creg) {
@@ -436,8 +423,6 @@ toshsd_irq(int irq, void *dev_id)
out:
/* Ensure all interrupt sources are cleared */
spin_lock(&host->lock);
- WRITE_TOSHSD(SD_CTRL_BufferCtrl, 0);
- WRITE_TOSHSD(SD_CTRL_CardStatus, 0);
if (reset && 0) {
DBG("Resetting device\n");
@@ -467,7 +452,6 @@ toshsd_mmc_start_command(struct toshsd_host *host, struct mmc_command *cmd)
cmd->resp[1] = 0;
cmd->resp[2] = 0;
cmd->resp[3] = 0;
- cmd->resp[4] = 0;
return;
}
@@ -529,9 +513,9 @@ toshsd_mmc_start_command(struct toshsd_host *host, struct mmc_command *cmd)
|
SD_CTRL_INTMASKCARD_CARD_INSERTED_0));
- WRITE_TOSHSD(SD_CTRL_IntMaskBuffer, ~(SD_CTRL_INTMASKBUFFER_UNK7
+ WRITE_TOSHSD(SD_CTRL_IntMaskBuffer, SD_CTRL_INTMASKBUFFER_UNK7
|
- SD_CTRL_INTMASKBUFFER_CMD_BUSY));
+ SD_CTRL_INTMASKBUFFER_CMD_BUSY);
/* Send the command */
WRITE_TOSHSD(SD_CTRL_Arg1, cmd->arg >> 16);
@@ -542,7 +526,7 @@ toshsd_mmc_start_command(struct toshsd_host *host, struct mmc_command *cmd)
static void
toshsd_mmc_start_data(struct toshsd_host *host, struct mmc_data *data)
{
- DBG("setup data transfer: blocksize %08x nr_blocks %d, page: %08x, offset: %08x\n", data->blksz, data->blocks, (unsigned int) data->sg->page, data->sg->offset);
+ DBG("setup data transfer: blocksize %08x nr_blocks %d, offset: %08x\n", data->blksz, data->blocks, data->sg->offset);
host->sg_len = data->sg_len;
host->sg_ptr = data->sg;
@@ -729,14 +713,14 @@ toshsd_suspend(struct pci_dev *pdev, pm_message_t state)
pci_write_config_word(host->chip->pdev, SD_CONFIG_Command,
0);
- ret = mmc_suspend_host(host->mmc, state);
- if (ret) {
- for (i--; i >= 0; i--) {
- mmc_resume_host(chip->hosts[i]->mmc);
- }
-
- return ret;
- }
+// ret = mmc_suspend_host(host->mmc, state);
+// if (ret) {
+// for (i--; i >= 0; i--) {
+// mmc_resume_host(chip->hosts[i]->mmc);
+// }
+//
+// return ret;
+// }
}
pci_save_state(pdev);
@@ -772,10 +756,10 @@ toshsd_resume(struct pci_dev *pdev)
toshsd_init(chip->hosts[i]);
// mmiowb();
- ret = mmc_resume_host(chip->hosts[i]->mmc);
- if (ret) {
- return ret;
- }
+// ret = mmc_resume_host(chip->hosts[i]->mmc);
+// if (ret) {
+// return ret;
+// }
}
return 0;
@@ -954,7 +938,7 @@ toshsd_probe_slot(struct pci_dev *pdev, int slot)
}
ret =
- request_irq(host->irq, toshsd_irq, SA_SHIRQ, host->slot_descr,
+ request_irq(host->irq, toshsd_irq, IRQF_SHARED, host->slot_descr,
host);
if (ret) {
goto untasklet;
diff --git a/drivers/mmc/host/toshsd.h b/drivers/mmc/host/toshsd.h
index bbb0e32..5057902 100644
--- a/drivers/mmc/host/toshsd.h
+++ b/drivers/mmc/host/toshsd.h
@@ -56,8 +56,8 @@
#define SD_CTRL_Response7 0x1a
#define SD_CTRL_CardStatus 0x1c
#define SD_CTRL_BufferCtrl 0x1e
-#define SD_CTRL_IntMaskBuffer 0x20
-#define SD_CTRL_IntMaskCard 0x22
+#define SD_CTRL_IntMaskCard 0x20
+#define SD_CTRL_IntMaskBuffer 0x22
#define SD_CTRL_CardClockCtrl 0x24
#define SD_CTRL_MemCardXferDataLen 0x26
#define SD_CTRL_MemCardOptionSetup 0x28
--
Ondrej Zary
--
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