lkml.org 
[lkml]   [2005]   [Nov]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
SubjectRe: [PATCH 2 of 2] tpm: updates for new hardware
From
Date
Patch to use ioread8 and iowrite8 as suggested.

Signed-off-by: Kylene Hall <kjhall@us.ibm.com>

On Mon, 2005-11-14 at 17:10 -0700, Bjorn Helgaas wrote:
> On Friday 11 November 2005 1:06 pm, Kylene Jo Hall wrote:
> > +#ifdef CONFIG_PPC64
> > +#define atmel_getb(chip, offset) readb(chip->vendor->iobase + offset);
> > +#define atmel_putb(val, chip, offset) writeb(val, chip->vendor->iobase + offset)
> > ...
> > +#else
> > +#define atmel_getb(chip, offset) inb(chip->vendor->base + offset)
> > +#define atmel_putb(val, chip, offset) outb(val, chip->vendor->base + offset)
>
> Why don't you use ioread8() instead of defining atmel_getb()?
>
> You'd still need something PPC64-specific to initialize the iomem cookie,
> but the accessors would go away.
>
> Unfortunately, ioread8() and associated interfaces aren't mentioned
> under Documentation/, but there are some hints in lib/iomap.c.
>
---
--- linux-2.6.15-rc1/drivers/char/tpm/tpm_atmel.c 2005-11-16 16:02:31.000000000 +0100
+++ linux-2.6.15-rc1-git4/drivers/char/tpm/tpm_atmel.c 2005-11-16 16:34:32.000000000 +0100
@@ -47,13 +47,12 @@ static int tpm_atml_recv(struct tpm_chip
return -EIO;

for (i = 0; i < 6; i++) {
- status = atmel_getb(chip, 1);
+ status = ioread8(chip->vendor->iobase + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(chip->dev,
- "error reading header\n");
+ dev_err(chip->dev, "error reading header\n");
return -EIO;
}
- *buf++ = atmel_getb(chip, 0);
+ *buf++ = ioread8(chip->vendor->iobase);
}

/* size of the data received */
@@ -64,10 +63,9 @@ static int tpm_atml_recv(struct tpm_chip
dev_err(chip->dev,
"Recv size(%d) less than available space\n", size);
for (; i < size; i++) { /* clear the waiting data anyway */
- status = atmel_getb(chip, 1);
+ status = ioread8(chip->vendor->iobase + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(chip->dev,
- "error reading data\n");
+ dev_err(chip->dev, "error reading data\n");
return -EIO;
}
}
@@ -76,17 +74,17 @@ static int tpm_atml_recv(struct tpm_chip

/* read all the data available */
for (; i < size; i++) {
- status = atmel_getb(chip, 1);
+ status = ioread8(chip->vendor->iobase + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(chip->dev,
- "error reading data\n");
+ dev_err(chip->dev, "error reading data\n");
return -EIO;
}
- *buf++ = atmel_getb(chip, 0);
+ *buf++ = ioread8(chip->vendor->iobase);
}

/* make sure data available is gone */
- status = atmel_getb(chip, 1);
+ status = ioread8(chip->vendor->iobase + 1);
+
if (status & ATML_STATUS_DATA_AVAIL) {
dev_err(chip->dev, "data available is stuck\n");
return -EIO;
@@ -102,7 +100,7 @@ static int tpm_atml_send(struct tpm_chip
dev_dbg(chip->dev, "tpm_atml_send:\n");
for (i = 0; i < count; i++) {
dev_dbg(chip->dev, "%d 0x%x(%d)\n", i, buf[i], buf[i]);
- atmel_putb(buf[i], chip, 0);
+ iowrite8(buf[i], chip->vendor->iobase);
}

return count;
@@ -110,12 +108,12 @@ static int tpm_atml_send(struct tpm_chip

static void tpm_atml_cancel(struct tpm_chip *chip)
{
- atmel_putb(ATML_STATUS_ABORT, chip, 1);
+ iowrite8(ATML_STATUS_ABORT, chip->vendor->iobase + 1);
}

static u8 tpm_atml_status(struct tpm_chip *chip)
{
- return atmel_getb(chip, 1);
+ return ioread8(chip->vendor->iobase + 1);
}

static struct file_operations atmel_ops = {
@@ -162,7 +160,8 @@ static void atml_plat_remove(void)

if (chip) {
if (chip->vendor->have_region)
- atmel_release_region(chip->vendor->base, chip->vendor->region_size);
+ atmel_release_region(chip->vendor->base,
+ chip->vendor->region_size);
atmel_put_base_addr(chip->vendor);
tpm_remove_hardware(chip->dev);
platform_device_unregister(pdev);
@@ -183,14 +182,19 @@ static int __init init_atmel(void)

driver_register(&atml_drv);

- if (atmel_get_base_addr(&tpm_atmel) != 0) {
+ if ((tpm_atmel.iobase = atmel_get_base_addr(&tpm_atmel)) == NULL) {
rc = -ENODEV;
goto err_unreg_drv;
}

- tpm_atmel.have_region = (atmel_request_region( tpm_atmel.base, tpm_atmel.region_size, "tpm_atmel0") == NULL) ? 0 : 1;
-
- if (IS_ERR(pdev = platform_device_register_simple("tpm_atmel", -1, NULL, 0 ))) {
+ tpm_atmel.have_region =
+ (atmel_request_region
+ (tpm_atmel.base, tpm_atmel.region_size,
+ "tpm_atmel0") == NULL) ? 0 : 1;
+
+ if (IS_ERR
+ (pdev =
+ platform_device_register_simple("tpm_atmel", -1, NULL, 0))) {
rc = PTR_ERR(pdev);
goto err_rel_reg;
}
@@ -202,9 +206,10 @@ static int __init init_atmel(void)
err_unreg_dev:
platform_device_unregister(pdev);
err_rel_reg:
- if (tpm_atmel.have_region)
- atmel_release_region(tpm_atmel.base, tpm_atmel.region_size);
atmel_put_base_addr(&tpm_atmel);
+ if (tpm_atmel.have_region)
+ atmel_release_region(tpm_atmel.base,
+ tpm_atmel.region_size);
err_unreg_drv:
driver_unregister(&atml_drv);
return rc;
--- linux-2.6.15-rc1/drivers/char/tpm/tpm_atmel.h 2005-11-16 16:02:31.000000000 +0100
+++ linux-2.6.15-rc1-git4/drivers/char/tpm/tpm_atmel.h 2005-11-16 15:43:26.000000000 +0100
@@ -27,12 +27,14 @@
#define atmel_putb(val, chip, offset) writeb(val, chip->vendor->iobase + offset)
#define atmel_request_region request_mem_region
#define atmel_release_region release_mem_region
-static inline void atmel_put_base_addr(struct tpm_vendor_specific *vendor)
+
+static inline void atmel_put_base_addr(struct tpm_vendor_specific
+ *vendor)
{
iounmap(vendor->iobase);
}

-static int atmel_get_base_addr(struct tpm_vendor_specific *vendor)
+static void __iomem * atmel_get_base_addr(struct tpm_vendor_specific *vendor)
{
struct device_node *dn;
unsigned long address, size;
@@ -44,11 +46,11 @@ static int atmel_get_base_addr(struct tp
dn = of_find_node_by_name(NULL, "tpm");

if (!dn)
- return 1;
+ return NULL;

if (!device_is_compatible(dn, "AT97SC3201")) {
of_node_put(dn);
- return 1;
+ return NULL;
}

reg = (unsigned int *) get_property(dn, "reg", &reglen);
@@ -71,8 +73,7 @@ static int atmel_get_base_addr(struct tp

vendor->base = address;
vendor->region_size = size;
- vendor->iobase = ioremap(address, size);
- return 0;
+ return ioremap(vendor->base, vendor->region_size);
}
#else
#define atmel_getb(chip, offset) inb(chip->vendor->base + offset)
@@ -105,18 +106,19 @@ static int atmel_verify_tpm11(void)
return 0;
}

-static inline void atmel_put_base_addr(struct tpm_vendor_specific *vendor)
+static inline void atmel_put_base_addr(struct tpm_vendor_specific
+ *vendor)
{
}

/* Determine where to talk to device */
-static unsigned long atmel_get_base_addr(struct tpm_vendor_specific
+static void __iomem * atmel_get_base_addr(struct tpm_vendor_specific
*vendor)
{
int lo, hi;

if (atmel_verify_tpm11() != 0)
- return 1;
+ return NULL;

lo = tpm_read_index(TPM_ADDR, TPM_ATMEL_BASE_ADDR_LO);
hi = tpm_read_index(TPM_ADDR, TPM_ATMEL_BASE_ADDR_HI);
@@ -124,6 +126,6 @@ static unsigned long atmel_get_base_addr
vendor->base = (hi << 8) | lo;
vendor->region_size = 2;

- return 0;
+ return ioport_map(vendor->base, vendor->region_size);
}
#endif


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-11-16 23:51    [W:0.109 / U:0.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site