[RFC v3 03/24] m68k/atari: Replace nvram_{read, write}_byte with arch_nvram_ops
By implementing an arch_nvram_ops struct, any platform can re-use the
drivers/char/nvram module without needing any arch-specific code
in that module. Atari does so here.
Atari has one user of nvram_check_checksum() whereas the other platforms
(i.e. x86 and ARM platforms) have none at all. Replace this
validate-checksum-and-read-byte sequence with the equivalent
rtc_nvram_ops.read() call and remove the now unused functions.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
The advantage of the new ops struct over the old global nvram_* functions
is that the misc device module can be shared by different platforms
without requiring every platform to implement every nvram_* function.
E.g. only RTC CMOS NVRAMs have a checksum and only PowerPC platforms
have a sync ioctl.
---
arch/m68k/atari/nvram.c | 89 --
drivers/scsi/atari_scsi.c |8 ++--
include/linux/nvram.h |9
3 files changed, 70 insertions(+), 36 deletions(-)
Index: linux/arch/m68k/atari/nvram.c
===
--- linux.orig/arch/m68k/atari/nvram.c 2015-06-28 11:41:29.0 +1000
+++ linux/arch/m68k/atari/nvram.c 2015-06-28 11:41:31.0 +1000
@@ -38,33 +38,12 @@ unsigned char __nvram_read_byte(int i)
return CMOS_READ(NVRAM_FIRST_BYTE + i);
}
-unsigned char nvram_read_byte(int i)
-{
- unsigned long flags;
- unsigned char c;
-
- spin_lock_irqsave(rtc_lock, flags);
- c = __nvram_read_byte(i);
- spin_unlock_irqrestore(rtc_lock, flags);
- return c;
-}
-EXPORT_SYMBOL(nvram_read_byte);
-
/* This races nicely with trying to read with checksum checking */
void __nvram_write_byte(unsigned char c, int i)
{
CMOS_WRITE(c, NVRAM_FIRST_BYTE + i);
}
-void nvram_write_byte(unsigned char c, int i)
-{
- unsigned long flags;
-
- spin_lock_irqsave(rtc_lock, flags);
- __nvram_write_byte(c, i);
- spin_unlock_irqrestore(rtc_lock, flags);
-}
-
/* On Ataris, the checksum is over all bytes except the checksum bytes
* themselves; these are at the very end.
*/
@@ -83,18 +62,6 @@ int __nvram_check_checksum(void)
(__nvram_read_byte(ATARI_CKS_LOC + 1) == (sum 0xff));
}
-int nvram_check_checksum(void)
-{
- unsigned long flags;
- int rv;
-
- spin_lock_irqsave(rtc_lock, flags);
- rv = __nvram_check_checksum();
- spin_unlock_irqrestore(rtc_lock, flags);
- return rv;
-}
-EXPORT_SYMBOL(nvram_check_checksum);
-
static void __nvram_set_checksum(void)
{
int i;
@@ -106,6 +73,62 @@ static void __nvram_set_checksum(void)
__nvram_write_byte(sum, ATARI_CKS_LOC + 1);
}
+static ssize_t nvram_read(char *buf, size_t count, loff_t *ppos)
+{
+ char *p = buf;
+ loff_t i;
+
+ spin_lock_irq(rtc_lock);
+
+ if (!__nvram_check_checksum()) {
+ spin_unlock_irq(rtc_lock);
+ return -EIO;
+ }
+
+ for (i = *ppos; count 0 i NVRAM_BYTES; --count, ++i, ++p)
+ *p = __nvram_read_byte(i);
+
+ spin_unlock_irq(rtc_lock);
+
+ *ppos = i;
+ return p - buf;
+}
+
+static ssize_t nvram_write(char *buf, size_t count, loff_t *ppos)
+{
+ char *p = buf;
+ loff_t i;
+
+ spin_lock_irq(rtc_lock);
+
+ if (!__nvram_check_checksum()) {
+ spin_unlock_irq(rtc_lock);
+ return -EIO;
+ }
+
+ for (i = *ppos; count 0 i NVRAM_BYTES; --count, ++i, ++p)
+ __nvram_write_byte(*p, i);
+
+ __nvram_set_checksum();
+
+ spin_unlock_irq(rtc_lock);
+
+ *ppos = i;
+ return p - buf;
+}
+
+static ssize_t nvram_get_size(void)
+{
+ return NVRAM_BYTES;
+}
+
+const struct nvram_ops arch_nvram_ops = {
+ .read = nvram_read,
+ .write = nvram_write,
+ .get_size = nvram_get_size,
+};
+EXPORT_SYMBOL(arch_nvram_ops);
+
#ifdef CONFIG_PROC_FS
static struct {
unsigned char val;
Index: linux/drivers/scsi/atari_scsi.c
===
--- linux.orig/drivers/scsi/atari_scsi.c2015-06-28 11:41:28.0
+1000
+++ linux/drivers/scsi/atari_scsi.c 2015-06-28 11:41:31.0 +1000
@@ -880,13 +880,15 @@ static int __init atari_scsi_probe(struc
#ifdef CONFIG_NVRAM
else
/* Test if a host id is set in the NVRam */
- if (ATARIHW_PRESENT(TT_CLK) nvram_check_checksum()) {
- unsigned char b = nvram_read_byte(14);
+ if (ATARIHW_PRESENT(TT_CLK)) {
+ unsigned char b;
+ loff_t offset = 14;
+ ssize_t count = arch_nvram_ops.read(b, 1, offset);
/* Arbitration enabled? (for TOS)
* If yes, use configured host ID
*/
- if (b
[RFC v3 16/24] powerpc, fbdev: Use arch_nvram_ops methods instead of nvram_read_byte() and nvram_write_byte()
Make use of arch_nvram_ops in device drivers so that the nvram_*
function exports can be removed.
Since they are no longer global symbols, rename the PPC32 nvram_* functions
appropriately.
Add the missing CONFIG_NVRAM test to imsttfb to avoid a build failure.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
arch/powerpc/kernel/setup_32.c |8
drivers/char/generic_nvram.c |4 ++--
drivers/video/fbdev/controlfb.c|4 ++--
drivers/video/fbdev/imsttfb.c |7 +++
drivers/video/fbdev/matrox/matroxfb_base.c |2 +-
drivers/video/fbdev/platinumfb.c |4 ++--
drivers/video/fbdev/valkyriefb.c |4 ++--
7 files changed, 16 insertions(+), 17 deletions(-)
Index: linux/arch/powerpc/kernel/setup_32.c
===
--- linux.orig/arch/powerpc/kernel/setup_32.c 2015-06-28 11:41:44.0
+1000
+++ linux/arch/powerpc/kernel/setup_32.c2015-06-28 11:41:46.0
+1000
@@ -170,20 +170,18 @@ __setup(l3cr=, ppc_setup_l3cr);
#ifdef CONFIG_GENERIC_NVRAM
-unsigned char nvram_read_byte(int addr)
+static unsigned char ppc_nvram_read_byte(int addr)
{
if (ppc_md.nvram_read_val)
return ppc_md.nvram_read_val(addr);
return 0xff;
}
-EXPORT_SYMBOL(nvram_read_byte);
-void nvram_write_byte(unsigned char val, int addr)
+static void ppc_nvram_write_byte(unsigned char val, int addr)
{
if (ppc_md.nvram_write_val)
ppc_md.nvram_write_val(addr, val);
}
-EXPORT_SYMBOL(nvram_write_byte);
static ssize_t ppc_nvram_get_size(void)
{
@@ -200,6 +198,8 @@ static long ppc_nvram_sync(void)
}
const struct nvram_ops arch_nvram_ops = {
+ .read_byte = ppc_nvram_read_byte,
+ .write_byte = ppc_nvram_write_byte,
.get_size = ppc_nvram_get_size,
.sync = ppc_nvram_sync,
};
Index: linux/drivers/char/generic_nvram.c
===
--- linux.orig/drivers/char/generic_nvram.c 2015-06-28 11:41:44.0
+1000
+++ linux/drivers/char/generic_nvram.c 2015-06-28 11:41:46.0 +1000
@@ -64,7 +64,7 @@ static ssize_t read_nvram(struct file *f
if (*ppos = nvram_len)
return 0;
for (i = *ppos; count 0 i nvram_len; ++i, ++p, --count)
- if (__put_user(nvram_read_byte(i), p))
+ if (__put_user(arch_nvram_ops.read_byte(i), p))
return -EFAULT;
*ppos = i;
return p - buf;
@@ -84,7 +84,7 @@ static ssize_t write_nvram(struct file *
for (i = *ppos; count 0 i nvram_len; ++i, ++p, --count) {
if (__get_user(c, p))
return -EFAULT;
- nvram_write_byte(c, i);
+ arch_nvram_ops.write_byte(c, i);
}
*ppos = i;
return p - buf;
Index: linux/drivers/video/fbdev/controlfb.c
===
--- linux.orig/drivers/video/fbdev/controlfb.c 2015-06-28 11:41:27.0
+1000
+++ linux/drivers/video/fbdev/controlfb.c 2015-06-28 11:41:46.0
+1000
@@ -415,7 +415,7 @@ static int __init init_control(struct fb
/* Try to pick a video mode out of NVRAM if we have one. */
#ifdef CONFIG_NVRAM
if (default_cmode == CMODE_NVRAM) {
- cmode = nvram_read_byte(NV_CMODE);
+ cmode = arch_nvram_ops.read_byte(NV_CMODE);
if(cmode CMODE_8 || cmode CMODE_32)
cmode = CMODE_8;
} else
@@ -423,7 +423,7 @@ static int __init init_control(struct fb
cmode=default_cmode;
#ifdef CONFIG_NVRAM
if (default_vmode == VMODE_NVRAM) {
- vmode = nvram_read_byte(NV_VMODE);
+ vmode = arch_nvram_ops.read_byte(NV_VMODE);
if (vmode 1 || vmode VMODE_MAX ||
control_mac_modes[vmode - 1].m[full] cmode) {
sense = read_control_sense(p);
Index: linux/drivers/video/fbdev/matrox/matroxfb_base.c
===
--- linux.orig/drivers/video/fbdev/matrox/matroxfb_base.c 2015-06-28
11:41:41.0 +1000
+++ linux/drivers/video/fbdev/matrox/matroxfb_base.c2015-06-28
11:41:46.0 +1000
@@ -1888,7 +1888,7 @@ static int initMatrox2(struct matrox_fb_
default_vmode = VMODE_640_480_60;
#ifdef CONFIG_NVRAM
if (default_cmode == CMODE_NVRAM)
- default_cmode = nvram_read_byte(NV_CMODE);
+ default_cmode = arch_nvram_ops.read_byte(NV_CMODE);
#endif
if (default_cmode CMODE_8 || default_cmode CMODE_32)
default_cmode = CMODE_8;
Index: linux/drivers/video/fbdev/platinumfb.c
[PATCH] ASoC: fsl_ssi: fix AC'97 mode
Currently the AC'97 mode in fsl_ssi driver isn't functional.
This patch implements the following changes to make it work
properly:
* IPG clock have to be enabled during AC'97 CODEC
register access,
* AC'97 DAI driver struct need the same probe method as
I2S one to setup DMA params,
* AC'97 bus can support asymmetric playback/capture rates,
* Check whether setting AC'97 ops succeeded and
clean them on removal so the driver can be reloaded,
* AC'97 CODEC will be instantiated in AC'97 mode,
* Set DAI format function small fixes in AC'97 mode.
Tested on UDOO board.
Signed-off-by: Maciej Szmigiero m...@maciej.szmigiero.name
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index c7647e0..9a63df2 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -900,14 +900,16 @@ static int _fsl_ssi_set_dai_fmt(struct device *dev,
scr = ~CCSR_SSI_SCR_SYS_CLK_EN;
break;
default:
- return -EINVAL;
+ if (!fsl_ssi_is_ac97(ssi_private))
+ return -EINVAL;
}
stcr |= strcr;
srcr |= strcr;
- if (ssi_private-cpu_dai_drv.symmetric_rates) {
- /* Need to clear RXDIR when using SYNC mode */
+ if (ssi_private-cpu_dai_drv.symmetric_rates
+ || fsl_ssi_is_ac97(ssi_private)) {
+ /* Need to clear RXDIR when using SYNC or AC97 mode */
srcr = ~CCSR_SSI_SRCR_RXDIR;
scr |= CCSR_SSI_SCR_SYN;
}
@@ -1101,6 +1103,7 @@ static const struct snd_soc_component_driver
fsl_ssi_component = {
static struct snd_soc_dai_driver fsl_ssi_ac97_dai = {
.bus_control = true,
+ .probe = fsl_ssi_dai_probe,
.playback = {
.stream_name = AC97 Playback,
.channels_min = 2,
@@ -1127,10 +1130,17 @@ static void fsl_ssi_ac97_write(struct snd_ac97 *ac97,
unsigned short reg,
struct regmap *regs = fsl_ac97_data-regs;
unsigned int lreg;
unsigned int lval;
+ int ret;
if (reg 0x7f)
return;
+ ret = clk_prepare_enable(fsl_ac97_data-clk);
+ if (ret) {
+ pr_err(ac97 write clk_prepare_enable failed: %d\n,
+ ret);
+ return;
+ }
lreg = reg 12;
regmap_write(regs, CCSR_SSI_SACADD, lreg);
@@ -1141,6 +1151,8 @@ static void fsl_ssi_ac97_write(struct snd_ac97 *ac97,
unsigned short reg,
regmap_update_bits(regs, CCSR_SSI_SACNT, CCSR_SSI_SACNT_RDWR_MASK,
CCSR_SSI_SACNT_WR);
udelay(100);
+
+ clk_disable_unprepare(fsl_ac97_data-clk);
}
static unsigned short fsl_ssi_ac97_read(struct snd_ac97 *ac97,
@@ -1151,6 +1163,14 @@ static unsigned short fsl_ssi_ac97_read(struct snd_ac97
*ac97,
unsigned short val = -1;
u32 reg_val;
unsigned int lreg;
+ int ret;
+
+ ret = clk_prepare_enable(fsl_ac97_data-clk);
+ if (ret) {
+ pr_err(ac97 read clk_prepare_enable failed: %d\n,
+ ret);
+ return -1;
+ }
lreg = (reg 0x7f) 12;
regmap_write(regs, CCSR_SSI_SACADD, lreg);
@@ -1162,6 +1182,8 @@ static unsigned short fsl_ssi_ac97_read(struct snd_ac97
*ac97,
regmap_read(regs, CCSR_SSI_SACDAT, reg_val);
val = (reg_val 4) 0x;
+ clk_disable_unprepare(fsl_ac97_data-clk);
+
return val;
}
@@ -1291,6 +1313,7 @@ static int fsl_ssi_probe(struct platform_device *pdev)
struct resource *res;
void __iomem *iomem;
char name[64];
+ bool newbinding;
of_id = of_match_device(fsl_ssi_ids, pdev-dev);
if (!of_id || !of_id-data)
@@ -1320,7 +1343,11 @@ static int fsl_ssi_probe(struct platform_device *pdev)
fsl_ac97_data = ssi_private;
- snd_soc_set_ac97_ops_of_reset(fsl_ssi_ac97_ops, pdev);
+ ret = snd_soc_set_ac97_ops_of_reset(fsl_ssi_ac97_ops, pdev);
+ if (ret) {
+ dev_err(pdev-dev, could not set AC'97 ops\n);
+ return ret;
+ }
} else {
/* Initialize this copy of the CPU DAI driver structure */
memcpy(ssi_private-cpu_dai_drv, fsl_ssi_dai_template,
@@ -1357,7 +1384,9 @@ static int fsl_ssi_probe(struct platform_device *pdev)
/* Are the RX and the TX clocks locked? */
if (!of_find_property(np, fsl,ssi-asynchronous, NULL)) {
- ssi_private-cpu_dai_drv.symmetric_rates = 1;
+ if (!fsl_ssi_is_ac97(ssi_private))
+ ssi_private-cpu_dai_drv.symmetric_rates = 1;
+
ssi_private-cpu_dai_drv.symmetric_channels = 1;
ssi_private-cpu_dai_drv.symmetric_samplebits = 1;
}
@@ -1405,7 +1434,8 @@ static int fsl_ssi_probe(struct platform_device *pdev)
* that the machine driver uses new binding which does
[RFC v3 17/24] nvram: Drop nvram_* symbol exports and prototypes
Drivers now use the arch_nvram_ops calls so remove the function exports and
prototypes. nvram_check_checksum() is unused so remove it.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
arch/m68k/atari/nvram.c |6 +++---
drivers/char/nvram.c| 27 +--
include/linux/nvram.h |8
3 files changed, 8 insertions(+), 33 deletions(-)
Index: linux/drivers/char/nvram.c
===
--- linux.orig/drivers/char/nvram.c 2015-06-28 11:41:44.0 +1000
+++ linux/drivers/char/nvram.c 2015-06-28 11:41:48.0 +1000
@@ -82,13 +82,12 @@ static ssize_t nvram_size;
* periodic 11 min sync from kernel/time/ntp.c vs. this driver.)
*/
-unsigned char __nvram_read_byte(int i)
+static unsigned char __nvram_read_byte(int i)
{
return CMOS_READ(NVRAM_FIRST_BYTE + i);
}
-EXPORT_SYMBOL(__nvram_read_byte);
-unsigned char nvram_read_byte(int i)
+static unsigned char nvram_read_byte(int i)
{
unsigned long flags;
unsigned char c;
@@ -98,16 +97,14 @@ unsigned char nvram_read_byte(int i)
spin_unlock_irqrestore(rtc_lock, flags);
return c;
}
-EXPORT_SYMBOL(nvram_read_byte);
/* This races nicely with trying to read with checksum checking (nvram_read) */
-void __nvram_write_byte(unsigned char c, int i)
+static void __nvram_write_byte(unsigned char c, int i)
{
CMOS_WRITE(c, NVRAM_FIRST_BYTE + i);
}
-EXPORT_SYMBOL(__nvram_write_byte);
-void nvram_write_byte(unsigned char c, int i)
+static void nvram_write_byte(unsigned char c, int i)
{
unsigned long flags;
@@ -115,14 +112,13 @@ void nvram_write_byte(unsigned char c, i
__nvram_write_byte(c, i);
spin_unlock_irqrestore(rtc_lock, flags);
}
-EXPORT_SYMBOL(nvram_write_byte);
/* On PCs, the checksum is built only over bytes 2..31 */
#define PC_CKS_RANGE_START 2
#define PC_CKS_RANGE_END 31
#define PC_CKS_LOC 32
-int __nvram_check_checksum(void)
+static int __nvram_check_checksum(void)
{
int i;
unsigned short sum = 0;
@@ -134,19 +130,6 @@ int __nvram_check_checksum(void)
__nvram_read_byte(PC_CKS_LOC+1);
return (sum 0x) == expect;
}
-EXPORT_SYMBOL(__nvram_check_checksum);
-
-int nvram_check_checksum(void)
-{
- unsigned long flags;
- int rv;
-
- spin_lock_irqsave(rtc_lock, flags);
- rv = __nvram_check_checksum();
- spin_unlock_irqrestore(rtc_lock, flags);
- return rv;
-}
-EXPORT_SYMBOL(nvram_check_checksum);
static void __nvram_set_checksum(void)
{
Index: linux/include/linux/nvram.h
===
--- linux.orig/include/linux/nvram.h2015-06-28 11:41:44.0 +1000
+++ linux/include/linux/nvram.h 2015-06-28 11:41:48.0 +1000
@@ -3,14 +3,6 @@
#include uapi/linux/nvram.h
-/* __foo is foo without grabbing the rtc_lock - get it yourself */
-extern unsigned char __nvram_read_byte(int i);
-extern unsigned char nvram_read_byte(int i);
-extern void __nvram_write_byte(unsigned char c, int i);
-extern void nvram_write_byte(unsigned char c, int i);
-extern int __nvram_check_checksum(void);
-extern int nvram_check_checksum(void);
-
struct nvram_ops {
ssize_t (*read)(char *, size_t, loff_t *);
ssize_t (*write)(char *, size_t, loff_t *);
Index: linux/arch/m68k/atari/nvram.c
===
--- linux.orig/arch/m68k/atari/nvram.c 2015-06-28 11:41:39.0 +1000
+++ linux/arch/m68k/atari/nvram.c 2015-06-28 11:41:48.0 +1000
@@ -33,13 +33,13 @@
* periodic 11 min sync from kernel/time/ntp.c vs. this driver.)
*/
-unsigned char __nvram_read_byte(int i)
+static unsigned char __nvram_read_byte(int i)
{
return CMOS_READ(NVRAM_FIRST_BYTE + i);
}
/* This races nicely with trying to read with checksum checking */
-void __nvram_write_byte(unsigned char c, int i)
+static void __nvram_write_byte(unsigned char c, int i)
{
CMOS_WRITE(c, NVRAM_FIRST_BYTE + i);
}
@@ -51,7 +51,7 @@ void __nvram_write_byte(unsigned char c,
#define ATARI_CKS_RANGE_END47
#define ATARI_CKS_LOC 48
-int __nvram_check_checksum(void)
+static int __nvram_check_checksum(void)
{
int i;
unsigned char sum = 0;
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Re: [PATCH] ASoC: fsl_ssi: fix AC'97 mode
Hello Fabio,
W dniu 28.06.2015 01:06, Fabio Estevam pisze:
Hi Maciej,
On Sat, Jun 27, 2015 at 7:51 PM, Maciej S. Szmigiero
m...@maciej.szmigiero.name wrote:
Currently the AC'97 mode in fsl_ssi driver isn't functional.
Thanks for the fix. I look forward to test it on my udoo board.
Thanks.
This patch implements the following changes to make it work
properly:
* IPG clock have to be enabled during AC'97 CODEC
register access,
* AC'97 DAI driver struct need the same probe method as
I2S one to setup DMA params,
* AC'97 bus can support asymmetric playback/capture rates,
* Check whether setting AC'97 ops succeeded and
clean them on removal so the driver can be reloaded,
* AC'97 CODEC will be instantiated in AC'97 mode,
* Set DAI format function small fixes in AC'97 mode.
It seems like a lot of changes in a single patch.
Care to split it into smaller pieces?
OK, I will resend this split into individual patches.
+
+ ret = clk_prepare_enable(fsl_ac97_data-clk);
+ if (ret) {
+ pr_err(ac97 read clk_prepare_enable failed: %d\n,
+ ret);
+ return -1;
'return ret' would be better here.
This function normal return value is an AC'97 register value,
so isn't more appropriate to return 0x in case of error
than linux error code?
Thanks
Best regards,
Maciej Szmigiero
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[PATCH] udc:Make various functions have a return type of void in the file fsl_qe_udc.c
This makes various USB and Endpoint manipulation functions have a
return type of void now due to these particular functions always
running to completion successfully nor their callers putting the
return value when calling one of these functions into a variable
to check/use later in their own intended internal function work.
Signed-off-by: Nicholas Krause xerofo...@gmail.com
---
drivers/usb/gadget/udc/fsl_qe_udc.c | 36
1 file changed, 12 insertions(+), 24 deletions(-)
diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.c
b/drivers/usb/gadget/udc/fsl_qe_udc.c
index e0822f1..d1e4354 100644
--- a/drivers/usb/gadget/udc/fsl_qe_udc.c
+++ b/drivers/usb/gadget/udc/fsl_qe_udc.c
@@ -143,7 +143,7 @@ static void nuke(struct qe_ep *ep, int status)
* USB and Endpoint manipulate process, include parameter and register *
*---*/
/* @value: 1--set stall 0--clean stall */
-static int qe_eprx_stall_change(struct qe_ep *ep, int value)
+static void qe_eprx_stall_change(struct qe_ep *ep, int value)
{
u16 tem_usep;
u8 epnum = ep-epnum;
@@ -157,10 +157,9 @@ static int qe_eprx_stall_change(struct qe_ep *ep, int
value)
tem_usep |= USB_RHS_IGNORE_OUT;
out_be16(udc-usb_regs-usb_usep[epnum], tem_usep);
- return 0;
}
-static int qe_eptx_stall_change(struct qe_ep *ep, int value)
+static void qe_eptx_stall_change(struct qe_ep *ep, int value)
{
u16 tem_usep;
u8 epnum = ep-epnum;
@@ -175,19 +174,17 @@ static int qe_eptx_stall_change(struct qe_ep *ep, int
value)
out_be16(udc-usb_regs-usb_usep[epnum], tem_usep);
- return 0;
}
-static int qe_ep0_stall(struct qe_udc *udc)
+static void qe_ep0_stall(struct qe_udc *udc)
{
qe_eptx_stall_change(udc-eps[0], 1);
qe_eprx_stall_change(udc-eps[0], 1);
udc-ep0_state = WAIT_FOR_SETUP;
udc-ep0_dir = 0;
- return 0;
}
-static int qe_eprx_nack(struct qe_ep *ep)
+static void qe_eprx_nack(struct qe_ep *ep)
{
u8 epnum = ep-epnum;
struct qe_udc *udc = ep-udc;
@@ -203,10 +200,9 @@ static int qe_eprx_nack(struct qe_ep *ep)
ep-state = EP_STATE_NACK;
}
- return 0;
}
-static int qe_eprx_normal(struct qe_ep *ep)
+static void qe_eprx_normal(struct qe_ep *ep)
{
struct qe_udc *udc = ep-udc;
@@ -224,10 +220,9 @@ static int qe_eprx_normal(struct qe_ep *ep)
ep-has_data = 0;
}
- return 0;
}
-static int qe_ep_cmd_stoptx(struct qe_ep *ep)
+static void qe_ep_cmd_stoptx(struct qe_ep *ep)
{
if (ep-udc-soc_type == PORT_CPM)
cpm_command(CPM_USB_STOP_TX | (ep-epnum CPM_USB_EP_SHIFT),
@@ -236,10 +231,9 @@ static int qe_ep_cmd_stoptx(struct qe_ep *ep)
qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB,
ep-epnum, 0);
- return 0;
}
-static int qe_ep_cmd_restarttx(struct qe_ep *ep)
+static void qe_ep_cmd_restarttx(struct qe_ep *ep)
{
if (ep-udc-soc_type == PORT_CPM)
cpm_command(CPM_USB_RESTART_TX | (ep-epnum
@@ -248,10 +242,9 @@ static int qe_ep_cmd_restarttx(struct qe_ep *ep)
qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB,
ep-epnum, 0);
- return 0;
}
-static int qe_ep_flushtxfifo(struct qe_ep *ep)
+static void qe_ep_flushtxfifo(struct qe_ep *ep)
{
struct qe_udc *udc = ep-udc;
int i;
@@ -268,19 +261,17 @@ static int qe_ep_flushtxfifo(struct qe_ep *ep)
ep-c_txbd = ep-txbase;
ep-n_txbd = ep-txbase;
qe_ep_cmd_restarttx(ep);
- return 0;
}
-static int qe_ep_filltxfifo(struct qe_ep *ep)
+static void qe_ep_filltxfifo(struct qe_ep *ep)
{
struct qe_udc *udc = ep-udc;
out_8(udc-usb_regs-usb_uscom,
USB_CMD_STR_FIFO | (USB_CMD_EP_MASK (ep-epnum)));
- return 0;
}
-static int qe_epbds_reset(struct qe_udc *udc, int pipe_num)
+static void qe_epbds_reset(struct qe_udc *udc, int pipe_num)
{
struct qe_ep *ep;
u32 bdring_len;
@@ -309,10 +300,9 @@ static int qe_epbds_reset(struct qe_udc *udc, int pipe_num)
}
out_be32((u32 __iomem *)bd, T_W);
- return 0;
}
-static int qe_ep_reset(struct qe_udc *udc, int pipe_num)
+static void qe_ep_reset(struct qe_udc *udc, int pipe_num)
{
struct qe_ep *ep;
u16 tmpusep;
@@ -339,13 +329,11 @@ static int qe_ep_reset(struct qe_udc *udc, int pipe_num)
qe_epbds_reset(udc, pipe_num);
- return 0;
}
-static int qe_ep_toggledata01(struct qe_ep *ep)
+static void qe_ep_toggledata01(struct qe_ep *ep)
{
ep-data01 ^= 0x1;
- return 0;
}
static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num)
--
2.1.4
___
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[RFC v3 10/24] m68k/atari: Implement arch_nvram_ops methods and enable CONFIG_HAVE_ARCH_NVRAM_OPS
Atari RTC NVRAM has a checksum so implement the remaining arch_nvram_ops
methods for the set_checksum and initialize ioctls. Enable
CONFIG_HAVE_ARCH_NVRAM_OPS.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
This re-enables the nvram module for Atari.
---
arch/m68k/Kconfig |3 +++
arch/m68k/atari/nvram.c | 24
drivers/char/Kconfig|2 +-
3 files changed, 28 insertions(+), 1 deletion(-)
Index: linux/arch/m68k/atari/nvram.c
===
--- linux.orig/arch/m68k/atari/nvram.c 2015-06-28 11:41:31.0 +1000
+++ linux/arch/m68k/atari/nvram.c 2015-06-28 11:41:39.0 +1000
@@ -73,6 +73,26 @@ static void __nvram_set_checksum(void)
__nvram_write_byte(sum, ATARI_CKS_LOC + 1);
}
+static long nvram_set_checksum(void)
+{
+ spin_lock_irq(rtc_lock);
+ __nvram_set_checksum();
+ spin_unlock_irq(rtc_lock);
+ return 0;
+}
+
+static long nvram_initialize(void)
+{
+ loff_t i;
+
+ spin_lock_irq(rtc_lock);
+ for (i = 0; i NVRAM_BYTES; ++i)
+ __nvram_write_byte(0, i);
+ __nvram_set_checksum();
+ spin_unlock_irq(rtc_lock);
+ return 0;
+}
+
static ssize_t nvram_read(char *buf, size_t count, loff_t *ppos)
{
char *p = buf;
@@ -119,6 +139,8 @@ static ssize_t nvram_write(char *buf, si
static ssize_t nvram_get_size(void)
{
+ if (!MACH_IS_ATARI)
+ return -ENODEV;
return NVRAM_BYTES;
}
@@ -126,6 +148,8 @@ const struct nvram_ops arch_nvram_ops =
.read = nvram_read,
.write = nvram_write,
.get_size = nvram_get_size,
+ .set_checksum = nvram_set_checksum,
+ .initialize = nvram_initialize,
};
EXPORT_SYMBOL(arch_nvram_ops);
Index: linux/drivers/char/Kconfig
===
--- linux.orig/drivers/char/Kconfig 2015-06-28 11:41:28.0 +1000
+++ linux/drivers/char/Kconfig 2015-06-28 11:41:39.0 +1000
@@ -247,7 +247,7 @@ source drivers/char/hw_random/Kconfig
config NVRAM
tristate /dev/nvram support
- depends on X86 || (ARM RTC_DRV_CMOS) || GENERIC_NVRAM
+ depends on X86 || (ARM RTC_DRV_CMOS) || GENERIC_NVRAM ||
HAVE_ARCH_NVRAM_OPS
---help---
If you say Y here and create a character special file /dev/nvram
with major number 10 and minor number 144 using mknod (man mknod),
Index: linux/arch/m68k/Kconfig
===
--- linux.orig/arch/m68k/Kconfig2015-06-28 11:41:27.0 +1000
+++ linux/arch/m68k/Kconfig 2015-06-28 11:41:39.0 +1000
@@ -71,6 +71,9 @@ config PGTABLE_LEVELS
default 2 if SUN3 || COLDFIRE
default 3
+config HAVE_ARCH_NVRAM_OPS
+ def_bool ATARI
+
source init/Kconfig
source kernel/Kconfig.freezer
___
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[RFC v3 07/24] char/nvram: Allow the set_checksum and initialize ioctls to be omitted
The drivers/char/nvram module has previously only supported RTC CMOS
NVRAM, for which it provides appropriate checksum ioctls. Make these
ioctls optional so the module can be re-used with other kinds of NVRAM.
The ops struct methods that implement the ioctls now return error
codes so that a multi-platform kernel binary can do the right thing when
running on hardware without suitable NVRAM.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
Changed since v1:
- Don't bother acquiring the mutex for unimplemented ioctls.
---
drivers/char/nvram.c | 71 --
include/linux/nvram.h |2 +
2 files changed, 43 insertions(+), 30 deletions(-)
Index: linux/drivers/char/nvram.c
===
--- linux.orig/drivers/char/nvram.c 2015-06-28 11:41:34.0 +1000
+++ linux/drivers/char/nvram.c 2015-06-28 11:41:36.0 +1000
@@ -153,16 +153,25 @@ static void __nvram_set_checksum(void)
__nvram_write_byte(sum 0xff, PC_CKS_LOC + 1);
}
-#if 0
-void nvram_set_checksum(void)
+static long nvram_set_checksum(void)
{
- unsigned long flags;
+ spin_lock_irq(rtc_lock);
+ __nvram_set_checksum();
+ spin_unlock_irq(rtc_lock);
+ return 0;
+}
+
+static long nvram_initialize(void)
+{
+ ssize_t i;
- spin_lock_irqsave(rtc_lock, flags);
+ spin_lock_irq(rtc_lock);
+ for (i = 0; i NVRAM_BYTES; ++i)
+ __nvram_write_byte(0, i);
__nvram_set_checksum();
- spin_unlock_irqrestore(rtc_lock, flags);
+ spin_unlock_irq(rtc_lock);
+ return 0;
}
-#endif /* 0 */
static ssize_t nvram_get_size(void)
{
@@ -173,6 +182,8 @@ const struct nvram_ops arch_nvram_ops =
.read_byte = nvram_read_byte,
.write_byte = nvram_write_byte,
.get_size = nvram_get_size,
+ .set_checksum = nvram_set_checksum,
+ .initialize = nvram_initialize,
};
EXPORT_SYMBOL(arch_nvram_ops);
@@ -272,51 +283,51 @@ checksum_err:
static long nvram_misc_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
- int i;
+ long ret = -ENOTTY;
switch (cmd) {
-
case NVRAM_INIT:
/* initialize NVRAM contents and checksum */
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- mutex_lock(nvram_mutex);
- spin_lock_irq(rtc_lock);
-
- for (i = 0; i NVRAM_BYTES; ++i)
- __nvram_write_byte(0, i);
- __nvram_set_checksum();
-
- spin_unlock_irq(rtc_lock);
- mutex_unlock(nvram_mutex);
- return 0;
-
+ if (arch_nvram_ops.initialize != NULL) {
+ mutex_lock(nvram_mutex);
+ ret = arch_nvram_ops.initialize();
+ mutex_unlock(nvram_mutex);
+ }
+ break;
case NVRAM_SETCKS:
/* just set checksum, contents unchanged (maybe useful after
* checksum garbaged somehow...) */
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- mutex_lock(nvram_mutex);
- spin_lock_irq(rtc_lock);
- __nvram_set_checksum();
- spin_unlock_irq(rtc_lock);
- mutex_unlock(nvram_mutex);
- return 0;
-
- default:
- return -ENOTTY;
+ if (arch_nvram_ops.set_checksum != NULL) {
+ mutex_lock(nvram_mutex);
+ ret = arch_nvram_ops.set_checksum();
+ mutex_unlock(nvram_mutex);
+ }
+ break;
}
+ return ret;
}
static int nvram_misc_open(struct inode *inode, struct file *file)
{
spin_lock(nvram_state_lock);
+ /* Prevent multiple readers/writers if desired. */
if ((nvram_open_cnt (file-f_flags O_EXCL)) ||
- (nvram_open_mode NVRAM_EXCL) ||
- ((file-f_mode FMODE_WRITE) (nvram_open_mode NVRAM_WRITE))) {
+ (nvram_open_mode NVRAM_EXCL)) {
+ spin_unlock(nvram_state_lock);
+ return -EBUSY;
+ }
+
+ /* Prevent multiple writers if the set_checksum ioctl is implemented. */
+ if ((arch_nvram_ops.set_checksum != NULL)
+ (file-f_mode FMODE_WRITE)
+ (nvram_open_mode NVRAM_WRITE)) {
spin_unlock(nvram_state_lock);
return -EBUSY;
}
Index: linux/include/linux/nvram.h
===
--- linux.orig/include/linux/nvram.h2015-06-28 11:41:34.0 +1000
+++ linux/include/linux/nvram.h 2015-06-28 11:41:36.0 +1000
@@ -17,6 +17,8 @@ struct nvram_ops {
unsigned char (*read_byte)(int);
void
[RFC v3 06/24] x86/thinkpad_acpi: Use arch_nvram_ops methods instead of nvram_read_byte() and nvram_write_byte()
Make use of arch_nvram_ops in the thinkpad_acpi driver so that the
nvram_* function exports can be removed.
This patch series was tested on a ThinkPad T43.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
Acked-by: Henrique de Moraes Holschuh h...@hmh.eng.br
Reviewed-by: Darren Hart dvh...@linux.intel.com
---
drivers/platform/x86/thinkpad_acpi.c | 20 ++--
1 file changed, 10 insertions(+), 10 deletions(-)
Index: linux/drivers/platform/x86/thinkpad_acpi.c
===
--- linux.orig/drivers/platform/x86/thinkpad_acpi.c 2015-06-28
11:41:28.0 +1000
+++ linux/drivers/platform/x86/thinkpad_acpi.c 2015-06-28 11:41:35.0
+1000
@@ -2311,30 +2311,30 @@ static void hotkey_read_nvram(struct tp_
u8 d;
if (m TP_NVRAM_HKEY_GROUP_HK2) {
- d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
+ d = arch_nvram_ops.read_byte(TP_NVRAM_ADDR_HK2);
n-thinkpad_toggle = !!(d TP_NVRAM_MASK_HKT_THINKPAD);
n-zoom_toggle = !!(d TP_NVRAM_MASK_HKT_ZOOM);
n-display_toggle = !!(d TP_NVRAM_MASK_HKT_DISPLAY);
n-hibernate_toggle = !!(d TP_NVRAM_MASK_HKT_HIBERNATE);
}
if (m TP_ACPI_HKEY_THNKLGHT_MASK) {
- d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
+ d = arch_nvram_ops.read_byte(TP_NVRAM_ADDR_THINKLIGHT);
n-thinklight_toggle = !!(d TP_NVRAM_MASK_THINKLIGHT);
}
if (m TP_ACPI_HKEY_DISPXPAND_MASK) {
- d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
+ d = arch_nvram_ops.read_byte(TP_NVRAM_ADDR_VIDEO);
n-displayexp_toggle =
!!(d TP_NVRAM_MASK_HKT_DISPEXPND);
}
if (m TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
- d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
+ d = arch_nvram_ops.read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
n-brightness_level = (d TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
TP_NVRAM_POS_LEVEL_BRIGHTNESS;
n-brightness_toggle =
!!(d TP_NVRAM_MASK_HKT_BRIGHTNESS);
}
if (m TP_NVRAM_HKEY_GROUP_VOLUME) {
- d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
+ d = arch_nvram_ops.read_byte(TP_NVRAM_ADDR_MIXER);
n-volume_level = (d TP_NVRAM_MASK_LEVEL_VOLUME)
TP_NVRAM_POS_LEVEL_VOLUME;
n-mute = !!(d TP_NVRAM_MASK_MUTE);
@@ -6155,7 +6155,7 @@ static unsigned int tpacpi_brightness_nv
{
u8 lnvram;
- lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
+ lnvram = (arch_nvram_ops.read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
TP_NVRAM_POS_LEVEL_BRIGHTNESS;
lnvram = bright_maxlvl;
@@ -6180,7 +6180,7 @@ static void tpacpi_brightness_checkpoint
if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, lec)))
goto unlock;
lec = TP_EC_BACKLIGHT_LVLMSK;
- b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
+ b_nvram = arch_nvram_ops.read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
if (lec != ((b_nvram TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
@@ -6188,7 +6188,7 @@ static void tpacpi_brightness_checkpoint
b_nvram = ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS
TP_NVRAM_POS_LEVEL_BRIGHTNESS);
b_nvram |= lec;
- nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
+ arch_nvram_ops.write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
dbg_printk(TPACPI_DBG_BRGHT,
updated NVRAM backlight level to %u (0x%02x)\n,
(unsigned int) lec, (unsigned int) b_nvram);
@@ -6796,13 +6796,13 @@ static void tpacpi_volume_checkpoint_nvr
if (unlikely(!acpi_ec_read(TP_EC_AUDIO, lec)))
goto unlock;
lec = ec_mask;
- b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
+ b_nvram = arch_nvram_ops.read_byte(TP_NVRAM_ADDR_MIXER);
if (lec != (b_nvram ec_mask)) {
/* NVRAM needs update */
b_nvram = ~ec_mask;
b_nvram |= lec;
- nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
+ arch_nvram_ops.write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
dbg_printk(TPACPI_DBG_MIXER,
updated NVRAM mixer status to 0x%02x (0x%02x)\n,
(unsigned int) lec, (unsigned int) b_nvram);
___
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[RFC v3 14/24] powerpc: Implement arch_nvram_ops.get_size() and remove old nvram_* exports
Implement arch_nvram_ops for PPC32 and make use of it in the generic_nvram
misc device module so that the nvram_* function exports can be removed.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
arch/powerpc/include/asm/nvram.h |3 ---
arch/powerpc/kernel/setup_32.c | 10 +++---
drivers/char/generic_nvram.c | 24
3 files changed, 19 insertions(+), 18 deletions(-)
Index: linux/arch/powerpc/include/asm/nvram.h
===
--- linux.orig/arch/powerpc/include/asm/nvram.h 2015-06-28 11:41:41.0
+1000
+++ linux/arch/powerpc/include/asm/nvram.h 2015-06-28 11:41:43.0
+1000
@@ -98,7 +98,4 @@ extern int nvram_write_os_partition(stru
unsigned int err_type,
unsigned int error_log_cnt);
-/* Determine NVRAM size */
-extern ssize_t nvram_get_size(void);
-
#endif /* _ASM_POWERPC_NVRAM_H */
Index: linux/arch/powerpc/kernel/setup_32.c
===
--- linux.orig/arch/powerpc/kernel/setup_32.c 2015-06-28 11:41:41.0
+1000
+++ linux/arch/powerpc/kernel/setup_32.c2015-06-28 11:41:43.0
+1000
@@ -186,13 +186,12 @@ void nvram_write_byte(unsigned char val,
}
EXPORT_SYMBOL(nvram_write_byte);
-ssize_t nvram_get_size(void)
+static ssize_t ppc_nvram_get_size(void)
{
if (ppc_md.nvram_size)
return ppc_md.nvram_size();
- return -1;
+ return -ENODEV;
}
-EXPORT_SYMBOL(nvram_get_size);
void nvram_sync(void)
{
@@ -201,6 +200,11 @@ void nvram_sync(void)
}
EXPORT_SYMBOL(nvram_sync);
+const struct nvram_ops arch_nvram_ops = {
+ .get_size = ppc_nvram_get_size,
+};
+EXPORT_SYMBOL(arch_nvram_ops);
+
#endif /* CONFIG_NVRAM */
int __init ppc_init(void)
Index: linux/drivers/char/generic_nvram.c
===
--- linux.orig/drivers/char/generic_nvram.c 2015-06-28 11:41:41.0
+1000
+++ linux/drivers/char/generic_nvram.c 2015-06-28 11:41:43.0 +1000
@@ -28,8 +28,6 @@
#include asm/machdep.h
#endif
-#define NVRAM_SIZE 8192
-
static DEFINE_MUTEX(nvram_mutex);
static ssize_t nvram_len;
@@ -150,20 +148,22 @@ static struct miscdevice nvram_dev = {
int __init nvram_init(void)
{
- int ret = 0;
+ int ret;
- printk(KERN_INFO Generic non-volatile memory driver v%s\n,
- NVRAM_VERSION);
- ret = misc_register(nvram_dev);
- if (ret != 0)
- goto out;
+ if (arch_nvram_ops.get_size == NULL)
+ return -ENODEV;
- nvram_len = nvram_get_size();
+ nvram_len = arch_nvram_ops.get_size();
if (nvram_len 0)
- nvram_len = NVRAM_SIZE;
+ return nvram_len;
-out:
- return ret;
+ ret = misc_register(nvram_dev);
+ if (ret)
+ return ret;
+
+ pr_info(Generic non-volatile memory driver v%s\n, NVRAM_VERSION);
+
+ return 0;
}
void __exit nvram_cleanup(void)
___
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[RFC v3 11/24] char/nvram: Add devname:nvram module alias
Signed-off-by: Finn Thain fth...@telegraphics.com.au --- drivers/char/nvram.c |1 + 1 file changed, 1 insertion(+) Index: linux/drivers/char/nvram.c === --- linux.orig/drivers/char/nvram.c 2015-06-28 11:41:38.0 +1000 +++ linux/drivers/char/nvram.c 2015-06-28 11:41:40.0 +1000 @@ -577,3 +577,4 @@ module_exit(nvram_module_exit); MODULE_LICENSE(GPL); MODULE_ALIAS_MISCDEV(NVRAM_MINOR); +MODULE_ALIAS(devname:nvram); ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
[RFC v3 08/24] char/nvram: Implement NVRAM read/write methods
Refactor the RTC CMOS NVRAM functions so that they can be used as
arch_nvram_ops methods. Checksumming logic is moved from the misc device
operations to the nvram read/write operations.
This makes the misc device implementation more generic. This also
preserves the locking semantics such that read if checksum valid and
write and update checksum remain atomic operations.
PPC64 implements byte-range read/write methods which are similar to
file_operations struct methods. Other platforms provide only
byte-at-a-time functions. So the misc device prefers the former but
will fall back on the latter.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
drivers/char/nvram.c | 162 +++
1 file changed, 114 insertions(+), 48 deletions(-)
Index: linux/drivers/char/nvram.c
===
--- linux.orig/drivers/char/nvram.c 2015-06-28 11:41:36.0 +1000
+++ linux/drivers/char/nvram.c 2015-06-28 11:41:37.0 +1000
@@ -41,6 +41,7 @@
#include linux/init.h
#include linux/proc_fs.h
#include linux/seq_file.h
+#include linux/slab.h
#include linux/spinlock.h
#include linux/io.h
#include linux/uaccess.h
@@ -178,9 +179,48 @@ static ssize_t nvram_get_size(void)
return NVRAM_BYTES;
}
+static ssize_t nvram_read(char *buf, size_t count, loff_t *ppos)
+{
+ char *p = buf;
+ loff_t i;
+
+ spin_lock_irq(rtc_lock);
+ if (!__nvram_check_checksum()) {
+ spin_unlock_irq(rtc_lock);
+ return -EIO;
+ }
+ for (i = *ppos; count 0 i NVRAM_BYTES; --count, ++i, ++p)
+ *p = __nvram_read_byte(i);
+ spin_unlock_irq(rtc_lock);
+
+ *ppos = i;
+ return p - buf;
+}
+
+static ssize_t nvram_write(char *buf, size_t count, loff_t *ppos)
+{
+ char *p = buf;
+ loff_t i;
+
+ spin_lock_irq(rtc_lock);
+ if (!__nvram_check_checksum()) {
+ spin_unlock_irq(rtc_lock);
+ return -EIO;
+ }
+ for (i = *ppos; count 0 i NVRAM_BYTES; --count, ++i, ++p)
+ __nvram_write_byte(*p, i);
+ __nvram_set_checksum();
+ spin_unlock_irq(rtc_lock);
+
+ *ppos = i;
+ return p - buf;
+}
+
const struct nvram_ops arch_nvram_ops = {
.read_byte = nvram_read_byte,
.write_byte = nvram_write_byte,
+ .read = nvram_read,
+ .write = nvram_write,
.get_size = nvram_get_size,
.set_checksum = nvram_set_checksum,
.initialize = nvram_initialize,
@@ -215,69 +255,95 @@ static loff_t nvram_misc_llseek(struct f
static ssize_t nvram_misc_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
- unsigned char contents[NVRAM_BYTES];
- unsigned i = *ppos;
- unsigned char *tmp;
-
- spin_lock_irq(rtc_lock);
+ loff_t i;
+ char __user *p = buf;
- if (!__nvram_check_checksum())
- goto checksum_err;
-
- for (tmp = contents; count-- 0 i NVRAM_BYTES; ++i, ++tmp)
- *tmp = __nvram_read_byte(i);
-
- spin_unlock_irq(rtc_lock);
-
- if (copy_to_user(buf, contents, tmp - contents))
+ if (!access_ok(VERIFY_WRITE, buf, count))
return -EFAULT;
+ if (*ppos = nvram_size)
+ return 0;
- *ppos = i;
-
- return tmp - contents;
+ /* If the arch provided a byte range read op, use it. Otherwise
+* fall back on the byte-at-a-time accessor.
+*/
+ if (arch_nvram_ops.read != NULL) {
+ char *tmp;
+ ssize_t ret;
+
+ count = min_t(size_t, count, nvram_size - *ppos);
+ count = min_t(size_t, count, PAGE_SIZE);
+
+ tmp = kmalloc(count, GFP_KERNEL);
+ if (!tmp)
+ return -ENOMEM;
+
+ ret = arch_nvram_ops.read(tmp, count, ppos);
+ if (ret = 0)
+ goto out;
+
+ if (copy_to_user(buf, tmp, ret)) {
+ *ppos -= ret;
+ ret = -EFAULT;
+ }
+
+out:
+ kfree(tmp);
+ return ret;
+ }
-checksum_err:
- spin_unlock_irq(rtc_lock);
- return -EIO;
+ for (i = *ppos; count 0 i nvram_size; ++i, ++p, --count)
+ if (__put_user(arch_nvram_ops.read_byte(i), p))
+ return -EFAULT;
+ *ppos = i;
+ return p - buf;
}
static ssize_t nvram_misc_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
- unsigned char contents[NVRAM_BYTES];
- unsigned i = *ppos;
- unsigned char *tmp;
-
- if (i = NVRAM_BYTES)
- return 0; /* Past EOF */
-
- if (count NVRAM_BYTES - i)
- count = NVRAM_BYTES
[RFC v3 13/24] powerpc: Add missing ppc_md.nvram_size for CHRP and PowerMac
Add the nvram_size() function to those PowerPC platforms that don't already
have one: CHRP and PowerMac. This means that the ppc_md.nvram_size()
function can be used to implement arch_nvram_ops.get_size()
Since we are addressing inconsistencies here, also rename chrp_nvram_read
and chrp_nvram_write, which break the naming convention used across
PowerPC platforms for NVRAM accessor functions.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
arch/powerpc/platforms/chrp/nvram.c | 14 ++
arch/powerpc/platforms/powermac/nvram.c |9 +
2 files changed, 19 insertions(+), 4 deletions(-)
Index: linux/arch/powerpc/platforms/chrp/nvram.c
===
--- linux.orig/arch/powerpc/platforms/chrp/nvram.c 2015-06-28
11:41:27.0 +1000
+++ linux/arch/powerpc/platforms/chrp/nvram.c 2015-06-28 11:41:42.0
+1000
@@ -23,7 +23,7 @@ static unsigned int nvram_size;
static unsigned char nvram_buf[4];
static DEFINE_SPINLOCK(nvram_lock);
-static unsigned char chrp_nvram_read(int addr)
+static unsigned char chrp_nvram_read_byte(int addr)
{
unsigned int done;
unsigned long flags;
@@ -45,7 +45,7 @@ static unsigned char chrp_nvram_read(int
return ret;
}
-static void chrp_nvram_write(int addr, unsigned char val)
+static void chrp_nvram_write_byte(int addr, unsigned char val)
{
unsigned int done;
unsigned long flags;
@@ -63,6 +63,11 @@ static void chrp_nvram_write(int addr, u
spin_unlock_irqrestore(nvram_lock, flags);
}
+static ssize_t chrp_nvram_size(void)
+{
+ return nvram_size;
+}
+
void __init chrp_nvram_init(void)
{
struct device_node *nvram;
@@ -84,8 +89,9 @@ void __init chrp_nvram_init(void)
printk(KERN_INFO CHRP nvram contains %u bytes\n, nvram_size);
of_node_put(nvram);
- ppc_md.nvram_read_val = chrp_nvram_read;
- ppc_md.nvram_write_val = chrp_nvram_write;
+ ppc_md.nvram_read_val = chrp_nvram_read_byte;
+ ppc_md.nvram_write_val = chrp_nvram_write_byte;
+ ppc_md.nvram_size = chrp_nvram_size;
return;
}
Index: linux/arch/powerpc/platforms/powermac/nvram.c
===
--- linux.orig/arch/powerpc/platforms/powermac/nvram.c 2015-06-28
11:41:27.0 +1000
+++ linux/arch/powerpc/platforms/powermac/nvram.c 2015-06-28
11:41:42.0 +1000
@@ -147,6 +147,11 @@ static ssize_t core99_nvram_size(void)
static volatile unsigned char __iomem *nvram_addr;
static int nvram_mult;
+static ssize_t ppc32_nvram_size(void)
+{
+ return NVRAM_SIZE;
+}
+
static unsigned char direct_nvram_read_byte(int addr)
{
return in_8(nvram_data[(addr (NVRAM_SIZE - 1)) * nvram_mult]);
@@ -590,21 +595,25 @@ int __init pmac_nvram_init(void)
nvram_mult = 1;
ppc_md.nvram_read_val = direct_nvram_read_byte;
ppc_md.nvram_write_val = direct_nvram_write_byte;
+ ppc_md.nvram_size = ppc32_nvram_size;
} else if (nvram_naddrs == 1) {
nvram_data = ioremap(r1.start, s1);
nvram_mult = (s1 + NVRAM_SIZE - 1) / NVRAM_SIZE;
ppc_md.nvram_read_val = direct_nvram_read_byte;
ppc_md.nvram_write_val = direct_nvram_write_byte;
+ ppc_md.nvram_size = ppc32_nvram_size;
} else if (nvram_naddrs == 2) {
nvram_addr = ioremap(r1.start, s1);
nvram_data = ioremap(r2.start, s2);
ppc_md.nvram_read_val = indirect_nvram_read_byte;
ppc_md.nvram_write_val = indirect_nvram_write_byte;
+ ppc_md.nvram_size = ppc32_nvram_size;
} else if (nvram_naddrs == 0 sys_ctrler == SYS_CTRLER_PMU) {
#ifdef CONFIG_ADB_PMU
nvram_naddrs = -1;
ppc_md.nvram_read_val = pmu_nvram_read_byte;
ppc_md.nvram_write_val = pmu_nvram_write_byte;
+ ppc_md.nvram_size = ppc32_nvram_size;
#endif /* CONFIG_ADB_PMU */
} else {
printk(KERN_ERR Incompatible type of NVRAM\n);
___
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[RFC v3 09/24] char/nvram: Use generic fixed_size_llseek()
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
drivers/char/nvram.c | 16 +---
1 file changed, 1 insertion(+), 15 deletions(-)
Index: linux/drivers/char/nvram.c
===
--- linux.orig/drivers/char/nvram.c 2015-06-28 11:41:37.0 +1000
+++ linux/drivers/char/nvram.c 2015-06-28 11:41:38.0 +1000
@@ -235,21 +235,7 @@ EXPORT_SYMBOL(arch_nvram_ops);
static loff_t nvram_misc_llseek(struct file *file, loff_t offset, int origin)
{
- switch (origin) {
- case 0:
- /* nothing to do */
- break;
- case 1:
- offset += file-f_pos;
- break;
- case 2:
- offset += NVRAM_BYTES;
- break;
- default:
- return -EINVAL;
- }
-
- return (offset = 0) ? (file-f_pos = offset) : -EINVAL;
+ return fixed_size_llseek(file, offset, origin, nvram_size);
}
static ssize_t nvram_misc_read(struct file *file, char __user *buf,
___
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[RFC v3 21/24] m68k/mac: Adopt naming and calling conventions for PRAM routines
Adopt the existing *_read_byte and *_write_byte naming convention.
Rename via_pram_readbyte and via_pram_writebyte to avoid confusion.
Adjust calling conventions of mac_pram_* functions to match the
arch_nvram_ops struct methods.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
Changes since v1:
- Don't introduce the arch_nvram_ops struct in this patch, even if it
would form a logical progression. Since the struct would get replaced
later on, some might see it as churn.
Changes since v2:
- Rename via_pram_send() and via_pram_recv() as
via_rtc_send() and via_rtc_recv() resp.
---
arch/m68k/mac/misc.c | 91 +--
1 file changed, 46 insertions(+), 45 deletions(-)
Index: linux/arch/m68k/mac/misc.c
===
--- linux.orig/arch/m68k/mac/misc.c 2015-06-28 11:41:27.0 +1000
+++ linux/arch/m68k/mac/misc.c 2015-06-28 11:41:53.0 +1000
@@ -61,7 +61,7 @@ static void cuda_write_time(long data)
cuda_poll();
}
-static __u8 cuda_read_pram(int offset)
+static unsigned char cuda_pram_read_byte(int offset)
{
struct adb_request req;
if (cuda_request(req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
@@ -72,7 +72,7 @@ static __u8 cuda_read_pram(int offset)
return req.reply[3];
}
-static void cuda_write_pram(int offset, __u8 data)
+static void cuda_pram_write_byte(unsigned char data, int offset)
{
struct adb_request req;
if (cuda_request(req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
@@ -84,8 +84,8 @@ static void cuda_write_pram(int offset,
#else
#define cuda_read_time() 0
#define cuda_write_time(n)
-#define cuda_read_pram NULL
-#define cuda_write_pram NULL
+#define cuda_pram_read_byte NULL
+#define cuda_pram_write_byte NULL
#endif
#ifdef CONFIG_ADB_PMU68K
@@ -116,7 +116,7 @@ static void pmu_write_time(long data)
pmu_poll();
}
-static __u8 pmu_read_pram(int offset)
+static unsigned char pmu_pram_read_byte(int offset)
{
struct adb_request req;
if (pmu_request(req, NULL, 3, PMU_READ_NVRAM,
@@ -127,7 +127,7 @@ static __u8 pmu_read_pram(int offset)
return req.reply[3];
}
-static void pmu_write_pram(int offset, __u8 data)
+static void pmu_pram_write_byte(unsigned char data, int offset)
{
struct adb_request req;
if (pmu_request(req, NULL, 4, PMU_WRITE_NVRAM,
@@ -139,8 +139,8 @@ static void pmu_write_pram(int offset, _
#else
#define pmu_read_time() 0
#define pmu_write_time(n)
-#define pmu_read_pram NULL
-#define pmu_write_pram NULL
+#define pmu_pram_read_byte NULL
+#define pmu_pram_write_byte NULL
#endif
#if 0 /* def CONFIG_ADB_MACIISI */
@@ -169,7 +169,7 @@ static void maciisi_write_time(long data
(data 8) 0xFF, data 0xFF);
}
-static __u8 maciisi_read_pram(int offset)
+static unsigned char maciisi_pram_read_byte(int offset)
{
struct adb_request req;
if (maciisi_request(req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
@@ -178,7 +178,7 @@ static __u8 maciisi_read_pram(int offset
return req.reply[3];
}
-static void maciisi_write_pram(int offset, __u8 data)
+static void maciisi_pram_write_byte(unsigned char data, int offset)
{
struct adb_request req;
maciisi_request(req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
@@ -187,8 +187,8 @@ static void maciisi_write_pram(int offse
#else
#define maciisi_read_time() 0
#define maciisi_write_time(n)
-#define maciisi_read_pram NULL
-#define maciisi_write_pram NULL
+#define maciisi_pram_read_byte NULL
+#define maciisi_pram_write_byte NULL
#endif
/*
@@ -198,7 +198,7 @@ static void maciisi_write_pram(int offse
* the RTC should be enabled.
*/
-static __u8 via_pram_readbyte(void)
+static __u8 via_rtc_recv(void)
{
int i,reg;
__u8data;
@@ -225,7 +225,7 @@ static __u8 via_pram_readbyte(void)
return data;
}
-static void via_pram_writebyte(__u8 data)
+static void via_rtc_send(__u8 data)
{
int i,reg,bit;
@@ -262,17 +262,17 @@ static void via_pram_command(int command
via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) ~VIA1B_vRTCEnb;
if (command 0xFF00) { /* extended (two-byte) command */
- via_pram_writebyte((command 0xFF00) 8);
- via_pram_writebyte(command 0xFF);
+ via_rtc_send((command 0xFF00) 8);
+ via_rtc_send(command 0xFF);
is_read = command 0x8000;
} else {/* one-byte command */
- via_pram_writebyte(command);
+ via_rtc_send(command);
is_read = command 0x80;
}
if (is_read) {
- *data = via_pram_readbyte();
+ *data = via_rtc_recv();
} else {
- via_pram_writebyte(*data);
+ via_rtc_send(*data);
}
/* All done, disable the RTC */
@@ -282,12 +282,12 @@
[RFC v3 23/24] m68k/mac: Fix PRAM accessors
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
Tested on a PowerBook 520 and Quadra 650.
Changes since v2:
- Make use of the RTC_* macros from the previous patch and add a few more
besides.
---
arch/m68k/mac/misc.c | 39 +--
include/uapi/linux/pmu.h |2 ++
2 files changed, 35 insertions(+), 6 deletions(-)
Index: linux/arch/m68k/mac/misc.c
===
--- linux.orig/arch/m68k/mac/misc.c 2015-06-28 11:41:54.0 +1000
+++ linux/arch/m68k/mac/misc.c 2015-06-28 11:41:55.0 +1000
@@ -119,19 +119,22 @@ static void pmu_write_time(long data)
static unsigned char pmu_pram_read_byte(int offset)
{
struct adb_request req;
- if (pmu_request(req, NULL, 3, PMU_READ_NVRAM,
- (offset 8) 0xFF, offset 0xFF) 0)
+
+ if (pmu_request(req, NULL, 3, PMU_READ_XPRAM,
+ offset 0xFF, 1) 0)
return 0;
while (!req.complete)
pmu_poll();
- return req.reply[3];
+
+ return req.reply[1];
}
static void pmu_pram_write_byte(unsigned char data, int offset)
{
struct adb_request req;
- if (pmu_request(req, NULL, 4, PMU_WRITE_NVRAM,
- (offset 8) 0xFF, offset 0xFF, data) 0)
+
+ if (pmu_request(req, NULL, 4, PMU_WRITE_XPRAM,
+ offset 0xFF, 1, data) 0)
return;
while (!req.complete)
pmu_poll();
@@ -257,6 +260,16 @@ static void via_rtc_send(__u8 data)
#define RTC_REG_WRITE_PROTECT 13
/*
+ * Inside Mac has no information about two-byte RTC commands but
+ * the MESS source code has the essentials.
+ */
+
+#define RTC_REG_XPRAM 14
+#define RTC_CMD_XPRAM_READ (RTC_CMD_READ(RTC_REG_XPRAM) 8)
+#define RTC_CMD_XPRAM_WRITE (RTC_CMD_WRITE(RTC_REG_XPRAM) 8)
+#define RTC_CMD_XPRAM_ARG(a)(((a 0xE0) 3) | ((a 0x1F) 2))
+
+/*
* Execute a VIA PRAM/RTC command. For read commands
* data should point to a one-byte buffer for the
* resulting data. For write commands it should point
@@ -303,11 +316,25 @@ static void via_rtc_command(int command,
static unsigned char via_pram_read_byte(int offset)
{
- return 0;
+ unsigned char temp;
+
+ via_rtc_command(RTC_CMD_XPRAM_READ | RTC_CMD_XPRAM_ARG(offset), temp);
+
+ return temp;
}
static void via_pram_write_byte(unsigned char data, int offset)
{
+ unsigned char temp;
+
+ temp = 0x55;
+ via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), temp);
+
+ temp = data;
+ via_rtc_command(RTC_CMD_XPRAM_WRITE | RTC_CMD_XPRAM_ARG(offset), temp);
+
+ temp = 0x55 | RTC_FLG_WRITE_PROTECT;
+ via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), temp);
}
/*
Index: linux/include/uapi/linux/pmu.h
===
--- linux.orig/include/uapi/linux/pmu.h 2015-06-28 11:41:27.0 +1000
+++ linux/include/uapi/linux/pmu.h 2015-06-28 11:41:55.0 +1000
@@ -18,7 +18,9 @@
#define PMU_POWER_CTRL 0x11/* control power of some devices */
#define PMU_ADB_CMD0x20/* send ADB packet */
#define PMU_ADB_POLL_OFF 0x21/* disable ADB auto-poll */
+#define PMU_WRITE_XPRAM0x32/* write eXtended Parameter RAM
*/
#define PMU_WRITE_NVRAM0x33/* write non-volatile RAM */
+#define PMU_READ_XPRAM 0x3a/* read eXtended Parameter RAM */
#define PMU_READ_NVRAM 0x3b/* read non-volatile RAM */
#define PMU_SET_RTC0x30/* set real-time clock */
#define PMU_READ_RTC 0x38/* read real-time clock */
___
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[PATCH] udc:Make the function txcomplete have a return type of void
This makes the function txcomplete have a return type of void
now due to this particular function always running successfully
nor its callers checking/using the return value from this particular
function in their own internal work.
Signed-off-by: Nicholas Krause xerofo...@gmail.com
---
drivers/usb/gadget/udc/fsl_qe_udc.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.c
b/drivers/usb/gadget/udc/fsl_qe_udc.c
index e0822f1..8c3a1ec 100644
--- a/drivers/usb/gadget/udc/fsl_qe_udc.c
+++ b/drivers/usb/gadget/udc/fsl_qe_udc.c
@@ -1139,7 +1139,7 @@ static int qe_ep_tx(struct qe_ep *ep, struct qe_frame
*frame)
/* when a bd was transmitted, the function can
* handle the tx_req, not include ep0 */
-static int txcomplete(struct qe_ep *ep, unsigned char restart)
+static void txcomplete(struct qe_ep *ep, unsigned char restart)
{
if (ep-tx_req != NULL) {
struct qe_req *req = ep-tx_req;
@@ -1184,8 +1184,6 @@ static int txcomplete(struct qe_ep *ep, unsigned char
restart)
ep-sent = 0;
}
}
-
- return 0;
}
/* give a frame and a tx_req, send some data */
--
2.1.4
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[RFC v3 15/24] powerpc: Implement nvram sync ioctl
Add the powerpc-specific sync() method to struct nvram_ops and implement
the corresponding ioctl in the nvram module. This allows the nvram module
to replace the generic_nvram module.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
On PPC32, the IOC_NVRAM_SYNC ioctl call always returns 0, even for those
platforms that don't implement ppc_md.nvram_sync. This patch retains
that quirk. It might be better to return failure (which is what PPC64 does).
Changed since v1:
- Don't bother acquiring the mutex for unimplemented ioctls.
---
arch/powerpc/include/asm/nvram.h |3 ---
arch/powerpc/kernel/setup_32.c |6 +++---
drivers/char/generic_nvram.c |2 +-
drivers/char/nvram.c | 39 +++
include/linux/nvram.h|4
5 files changed, 47 insertions(+), 7 deletions(-)
Index: linux/drivers/char/nvram.c
===
--- linux.orig/drivers/char/nvram.c 2015-06-28 11:41:40.0 +1000
+++ linux/drivers/char/nvram.c 2015-06-28 11:41:44.0 +1000
@@ -48,6 +48,11 @@
#include linux/mutex.h
+#ifdef CONFIG_PPC
+#include asm/nvram.h
+#include asm/machdep.h
+#endif
+
static DEFINE_MUTEX(nvram_mutex);
static DEFINE_SPINLOCK(nvram_state_lock);
static int nvram_open_cnt; /* #times opened */
@@ -338,6 +343,37 @@ static long nvram_misc_ioctl(struct file
long ret = -ENOTTY;
switch (cmd) {
+#ifdef CONFIG_PPC
+#ifdef CONFIG_PPC_PMAC
+ case OBSOLETE_PMAC_NVRAM_GET_OFFSET:
+ pr_warn(nvram: Using obsolete PMAC_NVRAM_GET_OFFSET ioctl\n);
+ /* fall through */
+ case IOC_NVRAM_GET_OFFSET: {
+ int part, offset;
+
+ if (!machine_is(powermac))
+ return -EINVAL;
+ if (copy_from_user(part,
+ (void __user *)arg, sizeof(part)) != 0)
+ return -EFAULT;
+ if (part pmac_nvram_OF || part pmac_nvram_NR)
+ return -EINVAL;
+ offset = pmac_get_partition(part);
+ if (copy_to_user((void __user *)arg,
+offset, sizeof(offset)) != 0)
+ return -EFAULT;
+ ret = 0;
+ break;
+ }
+#endif
+ case IOC_NVRAM_SYNC:
+ if (arch_nvram_ops.sync != NULL) {
+ mutex_lock(nvram_mutex);
+ ret = arch_nvram_ops.sync();
+ mutex_unlock(nvram_mutex);
+ }
+ break;
+#else /* !CONFIG_PPC */
case NVRAM_INIT:
/* initialize NVRAM contents and checksum */
if (!capable(CAP_SYS_ADMIN))
@@ -361,6 +397,7 @@ static long nvram_misc_ioctl(struct file
mutex_unlock(nvram_mutex);
}
break;
+#endif /* CONFIG_PPC */
}
return ret;
}
@@ -376,6 +413,7 @@ static int nvram_misc_open(struct inode
return -EBUSY;
}
+#ifndef CONFIG_PPC
/* Prevent multiple writers if the set_checksum ioctl is implemented. */
if ((arch_nvram_ops.set_checksum != NULL)
(file-f_mode FMODE_WRITE)
@@ -383,6 +421,7 @@ static int nvram_misc_open(struct inode
spin_unlock(nvram_state_lock);
return -EBUSY;
}
+#endif
if (file-f_flags O_EXCL)
nvram_open_mode |= NVRAM_EXCL;
Index: linux/include/linux/nvram.h
===
--- linux.orig/include/linux/nvram.h2015-06-28 11:41:36.0 +1000
+++ linux/include/linux/nvram.h 2015-06-28 11:41:44.0 +1000
@@ -17,8 +17,12 @@ struct nvram_ops {
unsigned char (*read_byte)(int);
void(*write_byte)(unsigned char, int);
ssize_t (*get_size)(void);
+#ifdef CONFIG_PPC
+ long(*sync)(void);
+#else
long(*set_checksum)(void);
long(*initialize)(void);
+#endif
};
extern const struct nvram_ops arch_nvram_ops;
Index: linux/arch/powerpc/include/asm/nvram.h
===
--- linux.orig/arch/powerpc/include/asm/nvram.h 2015-06-28 11:41:43.0
+1000
+++ linux/arch/powerpc/include/asm/nvram.h 2015-06-28 11:41:44.0
+1000
@@ -78,9 +78,6 @@ extern intpmac_get_partition(int partit
extern u8 pmac_xpram_read(int xpaddr);
extern voidpmac_xpram_write(int xpaddr, u8 data);
-/* Synchronize NVRAM */
-extern voidnvram_sync(void);
-
/* Initialize NVRAM OS partition */
extern int __init nvram_init_os_partition(struct nvram_os_partition *part);
Index: linux/arch/powerpc/kernel/setup_32.c
===
--- linux.orig/arch/powerpc/kernel/setup_32.c 2015-06-28
[RFC v3 18/24] powerpc: Remove CONFIG_GENERIC_NVRAM and adopt CONFIG_HAVE_ARCH_NVRAM_OPS
Switch PPC32 kernels from the generic_nvram module to the nvram module.
Also fix a theoretical bug where CHRP omits the chrp_nvram_init()
call when CONFIG_NVRAM_MODULE=m.
As before, when CONFIG_PPC !CONFIG_PPC_PMAC, the IOC_NVRAM_GET_OFFSET
ioctl is unimplemented. For the nvram module, unimplemented ioctls return
-ENOTTY. Whereas, for the superseded generic_nvram module they would
return -EINVAL.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
This ioctl change is visible to userspace code but only in an error path.
I didn't find any userspace code that uses the IOC_NVRAM_GET_OFFSET ioctl.
The change in the name of the module is also visible. The module that
implements /dev/nvram on PowerPC now has suitable aliases, i.e.
MODULE_ALIAS_MISCDEV(NVRAM_MINOR);
MODULE_ALIAS(devname:nvram);
so that the device special file can be automatically created and the
module automatically loaded when needed. Previously this was not the case.
---
Changes since v1:
- Small indentation fix.
---
arch/powerpc/Kconfig|2 +-
arch/powerpc/kernel/setup_32.c |2 +-
arch/powerpc/platforms/chrp/Makefile|2 +-
arch/powerpc/platforms/chrp/setup.c |2 +-
arch/powerpc/platforms/powermac/setup.c |3 +--
drivers/char/Kconfig| 10 ++
6 files changed, 11 insertions(+), 10 deletions(-)
Index: linux/arch/powerpc/Kconfig
===
--- linux.orig/arch/powerpc/Kconfig 2015-06-28 11:41:27.0 +1000
+++ linux/arch/powerpc/Kconfig 2015-06-28 11:41:49.0 +1000
@@ -178,7 +178,7 @@ config SYSVIPC_COMPAT
default y
# All PPC32s use generic nvram driver through ppc_md
-config GENERIC_NVRAM
+config HAVE_ARCH_NVRAM_OPS
bool
default y if PPC32
Index: linux/arch/powerpc/kernel/setup_32.c
===
--- linux.orig/arch/powerpc/kernel/setup_32.c 2015-06-28 11:41:46.0
+1000
+++ linux/arch/powerpc/kernel/setup_32.c2015-06-28 11:41:49.0
+1000
@@ -168,7 +168,7 @@ int __init ppc_setup_l3cr(char *str)
}
__setup(l3cr=, ppc_setup_l3cr);
-#ifdef CONFIG_GENERIC_NVRAM
+#if IS_ENABLED(CONFIG_NVRAM)
static unsigned char ppc_nvram_read_byte(int addr)
{
Index: linux/arch/powerpc/platforms/chrp/Makefile
===
--- linux.orig/arch/powerpc/platforms/chrp/Makefile 2015-06-28
11:41:27.0 +1000
+++ linux/arch/powerpc/platforms/chrp/Makefile 2015-06-28 11:41:49.0
+1000
@@ -1,3 +1,3 @@
obj-y += setup.o time.o pegasos_eth.o pci.o
obj-$(CONFIG_SMP) += smp.o
-obj-$(CONFIG_NVRAM)+= nvram.o
+obj-$(CONFIG_NVRAM:m=y)+= nvram.o
Index: linux/arch/powerpc/platforms/chrp/setup.c
===
--- linux.orig/arch/powerpc/platforms/chrp/setup.c 2015-06-28
11:41:27.0 +1000
+++ linux/arch/powerpc/platforms/chrp/setup.c 2015-06-28 11:41:49.0
+1000
@@ -557,7 +557,7 @@ void __init chrp_init_IRQ(void)
void __init
chrp_init2(void)
{
-#ifdef CONFIG_NVRAM
+#if IS_ENABLED(CONFIG_NVRAM)
chrp_nvram_init();
#endif
Index: linux/arch/powerpc/platforms/powermac/setup.c
===
--- linux.orig/arch/powerpc/platforms/powermac/setup.c 2015-06-28
11:41:27.0 +1000
+++ linux/arch/powerpc/platforms/powermac/setup.c 2015-06-28
11:41:49.0 +1000
@@ -321,8 +321,7 @@ static void __init pmac_setup_arch(void)
find_via_pmu();
smu_init();
-#if defined(CONFIG_NVRAM) || defined(CONFIG_NVRAM_MODULE) || \
-defined(CONFIG_PPC64)
+#if IS_ENABLED(CONFIG_NVRAM) || defined(CONFIG_PPC64)
pmac_nvram_init();
#endif
Index: linux/drivers/char/Kconfig
===
--- linux.orig/drivers/char/Kconfig 2015-06-28 11:41:39.0 +1000
+++ linux/drivers/char/Kconfig 2015-06-28 11:41:49.0 +1000
@@ -247,7 +247,7 @@ source drivers/char/hw_random/Kconfig
config NVRAM
tristate /dev/nvram support
- depends on X86 || (ARM RTC_DRV_CMOS) || GENERIC_NVRAM ||
HAVE_ARCH_NVRAM_OPS
+ depends on X86 || (ARM RTC_DRV_CMOS) || HAVE_ARCH_NVRAM_OPS
---help---
If you say Y here and create a character special file /dev/nvram
with major number 10 and minor number 144 using mknod (man mknod),
@@ -256,9 +256,11 @@ config NVRAM
and most Ataris. The actual number of bytes varies, depending on the
nvram in the system, but is usually 114 (128-14 for the RTC).
- This memory is conventionally called CMOS RAM on PCs and NVRAM
- on Ataris. /dev/nvram may be used to view settings there, or to
- change them (with some utility). It could also be used to
[RFC v3 19/24] char/generic_nvram: Remove as unused
And thus eliminate some twisted CONFIG_GENERIC_NVRAM logic.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
drivers/char/Makefile|6 -
drivers/char/generic_nvram.c | 176 ---
2 files changed, 1 insertion(+), 181 deletions(-)
Index: linux/drivers/char/Makefile
===
--- linux.orig/drivers/char/Makefile2015-06-28 11:41:27.0 +1000
+++ linux/drivers/char/Makefile 2015-06-28 11:41:51.0 +1000
@@ -30,11 +30,7 @@ obj-$(CONFIG_GEN_RTC)+= genrtc.o
obj-$(CONFIG_EFI_RTC) += efirtc.o
obj-$(CONFIG_DS1302) += ds1302.o
obj-$(CONFIG_XILINX_HWICAP)+= xilinx_hwicap/
-ifeq ($(CONFIG_GENERIC_NVRAM),y)
- obj-$(CONFIG_NVRAM) += generic_nvram.o
-else
- obj-$(CONFIG_NVRAM) += nvram.o
-endif
+obj-$(CONFIG_NVRAM)+= nvram.o
obj-$(CONFIG_TOSHIBA) += toshiba.o
obj-$(CONFIG_I8K) += i8k.o
obj-$(CONFIG_DS1620) += ds1620.o
Index: linux/drivers/char/generic_nvram.c
===
--- linux.orig/drivers/char/generic_nvram.c 2015-06-28 11:41:46.0
+1000
+++ /dev/null 1970-01-01 00:00:00.0 +
@@ -1,176 +0,0 @@
-/*
- * Generic /dev/nvram driver for architectures providing some
- * generic hooks, that is :
- *
- * nvram_read_byte, nvram_write_byte, nvram_sync, nvram_get_size
- *
- * Note that an additional hook is supported for PowerMac only
- * for getting the nvram partition informations
- *
- */
-
-#define NVRAM_VERSION 1.1
-
-#include linux/module.h
-
-#include linux/types.h
-#include linux/errno.h
-#include linux/fs.h
-#include linux/miscdevice.h
-#include linux/fcntl.h
-#include linux/init.h
-#include linux/mutex.h
-#include linux/nvram.h
-#include asm/uaccess.h
-
-#ifdef CONFIG_PPC_PMAC
-#include asm/nvram.h
-#include asm/machdep.h
-#endif
-
-static DEFINE_MUTEX(nvram_mutex);
-static ssize_t nvram_len;
-
-static loff_t nvram_llseek(struct file *file, loff_t offset, int origin)
-{
- switch (origin) {
- case 0:
- break;
- case 1:
- offset += file-f_pos;
- break;
- case 2:
- offset += nvram_len;
- break;
- default:
- offset = -1;
- }
- if (offset 0)
- return -EINVAL;
-
- file-f_pos = offset;
-
- return file-f_pos;
-}
-
-static ssize_t read_nvram(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
-{
- unsigned int i;
- char __user *p = buf;
-
- if (!access_ok(VERIFY_WRITE, buf, count))
- return -EFAULT;
- if (*ppos = nvram_len)
- return 0;
- for (i = *ppos; count 0 i nvram_len; ++i, ++p, --count)
- if (__put_user(arch_nvram_ops.read_byte(i), p))
- return -EFAULT;
- *ppos = i;
- return p - buf;
-}
-
-static ssize_t write_nvram(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- unsigned int i;
- const char __user *p = buf;
- char c;
-
- if (!access_ok(VERIFY_READ, buf, count))
- return -EFAULT;
- if (*ppos = nvram_len)
- return 0;
- for (i = *ppos; count 0 i nvram_len; ++i, ++p, --count) {
- if (__get_user(c, p))
- return -EFAULT;
- arch_nvram_ops.write_byte(c, i);
- }
- *ppos = i;
- return p - buf;
-}
-
-static int nvram_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
- switch(cmd) {
-#ifdef CONFIG_PPC_PMAC
- case OBSOLETE_PMAC_NVRAM_GET_OFFSET:
- printk(KERN_WARNING nvram: Using obsolete
PMAC_NVRAM_GET_OFFSET ioctl\n);
- case IOC_NVRAM_GET_OFFSET: {
- int part, offset;
-
- if (!machine_is(powermac))
- return -EINVAL;
- if (copy_from_user(part, (void __user*)arg, sizeof(part)) != 0)
- return -EFAULT;
- if (part pmac_nvram_OF || part pmac_nvram_NR)
- return -EINVAL;
- offset = pmac_get_partition(part);
- if (copy_to_user((void __user*)arg, offset, sizeof(offset)) !=
0)
- return -EFAULT;
- break;
- }
-#endif /* CONFIG_PPC_PMAC */
- case IOC_NVRAM_SYNC:
- arch_nvram_ops.sync();
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-static long nvram_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned
long arg)
-{
- int ret;
-
- mutex_lock(nvram_mutex);
- ret = nvram_ioctl(file, cmd, arg);
- mutex_unlock(nvram_mutex);
-
- return ret;
-}
-
-const struct file_operations nvram_fops = {
- .owner
[RFC v3 05/24] char/nvram: Adopt arch_nvram_ops
Different platforms and architectures offer different NVRAM sizes and
access methods. E.g. PPC32 has byte-at-a-time read/write functions whereas
PPC64 has byte-range read/write functions. Adopt the nvram_ops struct so
the nvram module can call such functions as are defined by the various
platforms and architectures.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
The #ifdefs here restrict the procfs and checksumming code to those
architectures with PC-style RTC NVRAM. There may be a better place for
that code but it's an open question. See https://lkml.org/lkml/2015/2/3/22
The procfs code here, if irrelevant to ARM platforms, could be moved to
arch/x86 (like the earlier patch does for m68k code) and the nvram ops
could be implemented and exported by the rtc-cmos driver instead. This
would eliminate these #ifdefs.
---
drivers/char/nvram.c | 30 +++---
include/linux/nvram.h |2 ++
2 files changed, 29 insertions(+), 3 deletions(-)
Index: linux/drivers/char/nvram.c
===
--- linux.orig/drivers/char/nvram.c 2015-06-28 11:41:32.0 +1000
+++ linux/drivers/char/nvram.c 2015-06-28 11:41:34.0 +1000
@@ -51,9 +51,12 @@ static DEFINE_MUTEX(nvram_mutex);
static DEFINE_SPINLOCK(nvram_state_lock);
static int nvram_open_cnt; /* #times opened */
static int nvram_open_mode;/* special open modes */
+static ssize_t nvram_size;
#define NVRAM_WRITE1 /* opened for writing (exclusive) */
#define NVRAM_EXCL 2 /* opened with O_EXCL */
+#if defined(CONFIG_X86) || defined(CONFIG_ARM)
+
/*
* These functions are provided to be called internally or by other parts of
* the kernel. It's up to the caller to ensure correct checksum before reading
@@ -161,6 +164,20 @@ void nvram_set_checksum(void)
}
#endif /* 0 */
+static ssize_t nvram_get_size(void)
+{
+ return NVRAM_BYTES;
+}
+
+const struct nvram_ops arch_nvram_ops = {
+ .read_byte = nvram_read_byte,
+ .write_byte = nvram_write_byte,
+ .get_size = nvram_get_size,
+};
+EXPORT_SYMBOL(arch_nvram_ops);
+
+#endif /* CONFIG_X86 || CONFIG_ARM */
+
/*
* The are the file operation function for user access to /dev/nvram
*/
@@ -332,7 +349,7 @@ static int nvram_misc_release(struct ino
return 0;
}
-#ifdef CONFIG_PROC_FS
+#if defined(CONFIG_PROC_FS) (defined(CONFIG_X86) || defined(CONFIG_ARM))
static char *floppy_types[] = {
none, 5.25'' 360k, 5.25'' 1.2M, 3.5'' 720k, 3.5'' 1.44M,
@@ -459,13 +476,20 @@ static int __init nvram_module_init(void
{
int ret;
+ if (arch_nvram_ops.get_size == NULL)
+ return -ENODEV;
+
+ nvram_size = arch_nvram_ops.get_size();
+ if (nvram_size 0)
+ return nvram_size;
+
ret = misc_register(nvram_misc);
if (ret) {
pr_err(nvram: can't misc_register on minor=%d\n, NVRAM_MINOR);
return ret;
}
-#ifdef CONFIG_PROC_FS
+#if defined(CONFIG_PROC_FS) (defined(CONFIG_X86) || defined(CONFIG_ARM))
if (!proc_create(driver/nvram, 0, NULL, nvram_proc_fops)) {
pr_err(nvram: can't create /proc/driver/nvram\n);
misc_deregister(nvram_misc);
@@ -479,7 +503,7 @@ static int __init nvram_module_init(void
static void __exit nvram_module_exit(void)
{
-#ifdef CONFIG_PROC_FS
+#if defined(CONFIG_PROC_FS) (defined(CONFIG_X86) || defined(CONFIG_ARM))
remove_proc_entry(driver/nvram, NULL);
#endif
misc_deregister(nvram_misc);
Index: linux/include/linux/nvram.h
===
--- linux.orig/include/linux/nvram.h2015-06-28 11:41:31.0 +1000
+++ linux/include/linux/nvram.h 2015-06-28 11:41:34.0 +1000
@@ -14,6 +14,8 @@ extern int nvram_check_checksum(void);
struct nvram_ops {
ssize_t (*read)(char *, size_t, loff_t *);
ssize_t (*write)(char *, size_t, loff_t *);
+ unsigned char (*read_byte)(int);
+ void(*write_byte)(unsigned char, int);
ssize_t (*get_size)(void);
};
___
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[RFC v3 01/24] scsi/atari_scsi: Dont select CONFIG_NVRAM
On powerpc, setting CONFIG_NVRAM=n builds a kernel with no NVRAM support.
Setting CONFIG_NVRAM=m enables the /dev/nvram misc device module without
enabling NVRAM support in drivers. Setting CONFIG_NVRAM=y enables the
misc device (built-in) and also enables NVRAM support in drivers.
m68k shares the valkyriefb driver with powerpc, and since that driver uses
NVRAM, it is affected by CONFIG_ATARI_SCSI, because of the use of
select NVRAM.
Adopt the powerpc convention on m68k to avoid surprises.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
This patch temporarily disables CONFIG_NVRAM on Atari, to prevent build
failures when bisecting the rest of this patch series. It gets enabled
again with the introduction of CONFIG_HAVE_ARCH_NVRAM_OPS, once the
nvram_* global functions have been moved to an ops struct.
The removal of select NVRAM may mean that some kernel configs (such
as Debian/m68k) may need tweaking.
---
drivers/char/Kconfig |5 +
drivers/scsi/Kconfig |6 +++---
drivers/scsi/atari_scsi.c |8
3 files changed, 8 insertions(+), 11 deletions(-)
Index: linux/drivers/char/Kconfig
===
--- linux.orig/drivers/char/Kconfig 2015-06-28 11:41:28.0 +1000
+++ linux/drivers/char/Kconfig 2015-06-28 11:41:28.0 +1000
@@ -247,7 +247,7 @@ source drivers/char/hw_random/Kconfig
config NVRAM
tristate /dev/nvram support
- depends on ATARI || X86 || (ARM RTC_DRV_CMOS) || GENERIC_NVRAM
+ depends on X86 || (ARM RTC_DRV_CMOS) || GENERIC_NVRAM
---help---
If you say Y here and create a character special file /dev/nvram
with major number 10 and minor number 144 using mknod (man mknod),
@@ -265,9 +265,6 @@ config NVRAM
should NEVER idly tamper with it. See Ralf Brown's interrupt list
for a guide to the use of CMOS bytes by your BIOS.
- On Atari machines, /dev/nvram is always configured and does not need
- to be selected.
-
To compile this driver as a module, choose M here: the
module will be called nvram.
Index: linux/drivers/scsi/Kconfig
===
--- linux.orig/drivers/scsi/Kconfig 2015-06-28 11:41:28.0 +1000
+++ linux/drivers/scsi/Kconfig 2015-06-28 11:41:28.0 +1000
@@ -1592,14 +1592,14 @@ config ATARI_SCSI
tristate Atari native SCSI support
depends on ATARI SCSI
select SCSI_SPI_ATTRS
- select NVRAM
---help---
If you have an Atari with built-in NCR5380 SCSI controller (TT,
Falcon, ...) say Y to get it supported. Of course also, if you have
a compatible SCSI controller (e.g. for Medusa).
- To compile this driver as a module, choose M here: the
- module will be called atari_scsi.
+ To compile this driver as a module, choose M here: the module will
+ be called atari_scsi. If you also enable NVRAM support, the SCSI
+ host's ID is taken from the setting in TT RTC NVRAM.
This driver supports both styles of NCR integration into the
system: the TT style (separate DMA), and the Falcon style (via
Index: linux/drivers/scsi/atari_scsi.c
===
--- linux.orig/drivers/scsi/atari_scsi.c2015-06-28 11:41:28.0
+1000
+++ linux/drivers/scsi/atari_scsi.c 2015-06-28 11:41:28.0 +1000
@@ -875,9 +875,10 @@ static int __init atari_scsi_probe(struc
if (ATARIHW_PRESENT(TT_SCSI) setup_sg_tablesize = 0)
atari_scsi_template.sg_tablesize = setup_sg_tablesize;
- if (setup_hostid = 0) {
+ if (setup_hostid = 0)
atari_scsi_template.this_id = setup_hostid 7;
- } else {
+#ifdef CONFIG_NVRAM
+ else
/* Test if a host id is set in the NVRam */
if (ATARIHW_PRESENT(TT_CLK) nvram_check_checksum()) {
unsigned char b = nvram_read_byte(14);
@@ -888,8 +889,7 @@ static int __init atari_scsi_probe(struc
if (b 0x80)
atari_scsi_template.this_id = b 7;
}
- }
-
+#endif
#ifdef REAL_DMA
/* If running on a Falcon and if there's TT-Ram (i.e., more than one
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[RFC v3 04/24] char/nvram: Re-order functions to remove forward declarations and #ifdefs
Also give functions more sensible names: nvram_misc_* for misc device ops,
nvram_proc_* for proc file ops and nvram_module_* for init and exit
functions. This makes them distict from nvram_ops members.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
drivers/char/nvram.c | 194 ++-
1 file changed, 86 insertions(+), 108 deletions(-)
Index: linux/drivers/char/nvram.c
===
--- linux.orig/drivers/char/nvram.c 2015-06-28 11:41:29.0 +1000
+++ linux/drivers/char/nvram.c 2015-06-28 11:41:32.0 +1000
@@ -54,11 +54,6 @@ static int nvram_open_mode; /* special o
#define NVRAM_WRITE1 /* opened for writing (exclusive) */
#define NVRAM_EXCL 2 /* opened with O_EXCL */
-#ifdef CONFIG_PROC_FS
-static void pc_nvram_proc_read(unsigned char *contents, struct seq_file *seq,
- void *offset);
-#endif
-
/*
* These functions are provided to be called internally or by other parts of
* the kernel. It's up to the caller to ensure correct checksum before reading
@@ -170,7 +165,7 @@ void nvram_set_checksum(void)
* The are the file operation function for user access to /dev/nvram
*/
-static loff_t nvram_llseek(struct file *file, loff_t offset, int origin)
+static loff_t nvram_misc_llseek(struct file *file, loff_t offset, int origin)
{
switch (origin) {
case 0:
@@ -189,8 +184,8 @@ static loff_t nvram_llseek(struct file *
return (offset = 0) ? (file-f_pos = offset) : -EINVAL;
}
-static ssize_t nvram_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
+static ssize_t nvram_misc_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
{
unsigned char contents[NVRAM_BYTES];
unsigned i = *ppos;
@@ -218,8 +213,8 @@ checksum_err:
return -EIO;
}
-static ssize_t nvram_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
+static ssize_t nvram_misc_write(struct file *file, const char __user *buf,
+size_t count, loff_t *ppos)
{
unsigned char contents[NVRAM_BYTES];
unsigned i = *ppos;
@@ -257,8 +252,8 @@ checksum_err:
return -EIO;
}
-static long nvram_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
+static long nvram_misc_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int i;
@@ -298,7 +293,7 @@ static long nvram_ioctl(struct file *fil
}
}
-static int nvram_open(struct inode *inode, struct file *file)
+static int nvram_misc_open(struct inode *inode, struct file *file)
{
spin_lock(nvram_state_lock);
@@ -320,7 +315,7 @@ static int nvram_open(struct inode *inod
return 0;
}
-static int nvram_release(struct inode *inode, struct file *file)
+static int nvram_misc_release(struct inode *inode, struct file *file)
{
spin_lock(nvram_state_lock);
@@ -337,100 +332,6 @@ static int nvram_release(struct inode *i
return 0;
}
-#ifndef CONFIG_PROC_FS
-static int nvram_add_proc_fs(void)
-{
- return 0;
-}
-
-#else
-
-static int nvram_proc_read(struct seq_file *seq, void *offset)
-{
- unsigned char contents[NVRAM_BYTES];
- int i = 0;
-
- spin_lock_irq(rtc_lock);
- for (i = 0; i NVRAM_BYTES; ++i)
- contents[i] = __nvram_read_byte(i);
- spin_unlock_irq(rtc_lock);
-
- pc_nvram_proc_read(contents, seq, offset);
-
- return 0;
-}
-
-static int nvram_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, nvram_proc_read, NULL);
-}
-
-static const struct file_operations nvram_proc_fops = {
- .owner = THIS_MODULE,
- .open = nvram_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release= single_release,
-};
-
-static int nvram_add_proc_fs(void)
-{
- if (!proc_create(driver/nvram, 0, NULL, nvram_proc_fops))
- return -ENOMEM;
- return 0;
-}
-
-#endif /* CONFIG_PROC_FS */
-
-static const struct file_operations nvram_fops = {
- .owner = THIS_MODULE,
- .llseek = nvram_llseek,
- .read = nvram_read,
- .write = nvram_write,
- .unlocked_ioctl = nvram_ioctl,
- .open = nvram_open,
- .release= nvram_release,
-};
-
-static struct miscdevice nvram_dev = {
- NVRAM_MINOR,
- nvram,
- nvram_fops
-};
-
-static int __init nvram_init(void)
-{
- int ret;
-
- ret = misc_register(nvram_dev);
- if (ret) {
- printk(KERN_ERR nvram: can't misc_register on minor=%d\n,
- NVRAM_MINOR);
-
[RFC v3 00/24] Re-use nvram module
The generic NVRAM module, drivers/char/generic_nvram, implements a /dev/nvram misc device. It is used only by 32-bit PowerPC platforms and isn't generic enough to be more widely used. The RTC NVRAM module, drivers/char/nvram, also implements a /dev/nvram misc device. It is used by x86, ARM and m68k. The former module cannot be used on x86, ARM or m68k because it cannot co-exist with the latter module, partly due to the Kconfig logic. It is possible to modify the modules so that one kernel binary could have either, neither or both. However, automatically loading the appropriate module is then impossible; if both provide the char-major-10-144 alias then the wrong module will end up being loaded. Hence a multi-platform kernel binary needs a single generic nvram module with alias char-major-10-144. Therefore, drivers/char/nvram.c should be made more generic and the arch-specific code therein should be moved to a more appropriate place under arch/. Also, drivers/char/generic_nvram.c should be removed to reduce code duplication. In this patch series, Atari-specific code is moved from the nvram module to arch/m68k/atari. More arch-specific code in the nvram module could be moved, probably to arch/x86, but it is difficult to determine just what code is relevant to ARM platforms and what code is x86-only. In addressing code duplication, this patch series removes three inconsistent /dev/nvram misc device implementations. One of these, drivers/macintosh/nvram.c is entirely unused already. The other two, drivers/char/generic_nvram.c and the misc device implementation in arch/powerpc/kernel/nvram_64.c, are replaced by drivers/char/nvram.c. A benefit of this work is better consistency -- between PPC32 and PPC64 as well as between PPC_PMAC and MAC. This new uniformity does have implications for userspace, that is, some error codes for some ioctl calls become consistent on all PowerPC platforms. The drivers/char/nvram module becomes sufficiently generic to be useful to other platforms and architectures, besides those with CMOS RTC. At the end of this patch series the module is adopted by the m68k Mac port, which already has PRAM access functions but lacks the /dev/nvram misc device. This patch series has been compile-tested for arm, m68k, powerpc and x86. The nvram and thinkpad_acpi modules were regression tested on a ThinkPad T43. The /dev/nvram functionality was also regression tested on a G3 PowerMac. The nvram module was also tested on a PowerBook 520 and Quadra 650. Note that my testing doesn't cover PPC64 or Atari. Changes since v1: - Minor changes to patches 7, 15 and 20 as described in commit logs. - Revised patches 21 and 24 to address comments from Geert. Changes since v2: - Dropped patch 1, macintosh/nvram: Remove as unused, because it has since been merged. - Inserted a new patch, m68k/mac: Use macros for RTC accesses not magic numbers. - Revised patches 21 and 23 to address comments from Geert. --- arch/m68k/Kconfig |3 arch/m68k/atari/Makefile |2 arch/m68k/atari/nvram.c| 291 +++ arch/m68k/kernel/setup_mm.c| 107 arch/m68k/mac/misc.c | 207 +--- arch/powerpc/Kconfig |5 arch/powerpc/include/asm/nvram.h |9 arch/powerpc/kernel/nvram_64.c | 203 +-- arch/powerpc/kernel/setup_32.c | 27 - arch/powerpc/platforms/chrp/Makefile |2 arch/powerpc/platforms/chrp/nvram.c| 14 arch/powerpc/platforms/chrp/setup.c|2 arch/powerpc/platforms/powermac/Makefile |5 arch/powerpc/platforms/powermac/nvram.c|9 arch/powerpc/platforms/powermac/setup.c|3 drivers/char/Kconfig | 13 drivers/char/Makefile |6 drivers/char/generic_nvram.c | 174 -- drivers/char/nvram.c | 742 - drivers/platform/x86/thinkpad_acpi.c | 20 drivers/scsi/Kconfig |6 drivers/scsi/atari_scsi.c | 16 drivers/video/fbdev/controlfb.c|4 drivers/video/fbdev/imsttfb.c |7 drivers/video/fbdev/matrox/matroxfb_base.c |4 drivers/video/fbdev/platinumfb.c |4 drivers/video/fbdev/valkyriefb.c |4 include/linux/nvram.h | 23 include/uapi/linux/pmu.h |2 29 files changed, 982 insertions(+), 932 deletions(-) ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
[RFC v3 22/24] m68k/mac: Use macros for RTC accesses not magic numbers
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
This is intended to improve code style and not affect code behaviour.
I've tested this on a Quadra 650.
I don't know the meanings of the 4 undocumented write protect register
bits 0x55, so I decided against defining 4 macros for those bits.
---
arch/m68k/mac/misc.c | 59 +++
1 file changed, 41 insertions(+), 18 deletions(-)
Index: linux/arch/m68k/mac/misc.c
===
--- linux.orig/arch/m68k/mac/misc.c 2015-06-28 11:41:53.0 +1000
+++ linux/arch/m68k/mac/misc.c 2015-06-28 11:41:54.0 +1000
@@ -242,6 +242,21 @@ static void via_rtc_send(__u8 data)
}
/*
+ * These values can be found in Inside Macintosh vol. III ch. 2
+ * which has a description of the RTC chip in the original Mac.
+ */
+
+#define RTC_FLG_READBIT(7)
+#define RTC_FLG_WRITE_PROTECT BIT(7)
+#define RTC_CMD_READ(r) (RTC_FLG_READ | (r 2))
+#define RTC_CMD_WRITE(r)(r 2)
+#define RTC_REG_SECONDS_0 0
+#define RTC_REG_SECONDS_1 1
+#define RTC_REG_SECONDS_2 2
+#define RTC_REG_SECONDS_3 3
+#define RTC_REG_WRITE_PROTECT 13
+
+/*
* Execute a VIA PRAM/RTC command. For read commands
* data should point to a one-byte buffer for the
* resulting data. For write commands it should point
@@ -250,13 +265,17 @@ static void via_rtc_send(__u8 data)
* This function disables all interrupts while running.
*/
-static void via_pram_command(int command, __u8 *data)
+static void via_rtc_command(int command, __u8 *data)
{
unsigned long flags;
int is_read;
local_irq_save(flags);
+ /* The least significant bits must be 0b01 according to Inside Mac */
+
+ command = (command ~3) | 1;
+
/* Enable the RTC and make sure the strobe line is high */
via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) ~VIA1B_vRTCEnb;
@@ -264,10 +283,10 @@ static void via_pram_command(int command
if (command 0xFF00) { /* extended (two-byte) command */
via_rtc_send((command 0xFF00) 8);
via_rtc_send(command 0xFF);
- is_read = command 0x8000;
+ is_read = command (RTC_FLG_READ 8);
} else {/* one-byte command */
via_rtc_send(command);
- is_read = command 0x80;
+ is_read = command RTC_FLG_READ;
}
if (is_read) {
*data = via_rtc_recv();
@@ -306,10 +325,10 @@ static long via_read_time(void)
} result, last_result;
int count = 1;
- via_pram_command(0x81, last_result.cdata[3]);
- via_pram_command(0x85, last_result.cdata[2]);
- via_pram_command(0x89, last_result.cdata[1]);
- via_pram_command(0x8D, last_result.cdata[0]);
+ via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_0), last_result.cdata[3]);
+ via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_1), last_result.cdata[2]);
+ via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_2), last_result.cdata[1]);
+ via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_3), last_result.cdata[0]);
/*
* The NetBSD guys say to loop until you get the same reading
@@ -317,10 +336,14 @@ static long via_read_time(void)
*/
while (1) {
- via_pram_command(0x81, result.cdata[3]);
- via_pram_command(0x85, result.cdata[2]);
- via_pram_command(0x89, result.cdata[1]);
- via_pram_command(0x8D, result.cdata[0]);
+ via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_0),
+ result.cdata[3]);
+ via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_1),
+ result.cdata[2]);
+ via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_2),
+ result.cdata[1]);
+ via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_3),
+ result.cdata[0]);
if (result.idata == last_result.idata)
return result.idata - RTC_OFFSET;
@@ -356,18 +379,18 @@ static void via_write_time(long time)
/* Clear the write protect bit */
temp = 0x55;
- via_pram_command(0x35, temp);
+ via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), temp);
data.idata = time + RTC_OFFSET;
- via_pram_command(0x01, data.cdata[3]);
- via_pram_command(0x05, data.cdata[2]);
- via_pram_command(0x09, data.cdata[1]);
- via_pram_command(0x0D, data.cdata[0]);
+ via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_0), data.cdata[3]);
+ via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_1), data.cdata[2]);
+ via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_2), data.cdata[1]);
+ via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_3), data.cdata[0]);
/* Set the write protect bit
[RFC v3 24/24] m68k: Dispatch nvram_ops calls to Atari or Mac functions
A multi-platform kernel binary needs to decide at run-time how to dispatch
the arch_nvram_ops calls. Add platform-independent arch_nvram_ops, for use
when multiple platform-specific NVRAM ops implementations are needed.
Enable CONFIG_HAVE_ARCH_NVRAM_OPS for Macs.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
Changed since v1:
- Removed Mac and Atari ops struct definitions and the associated #ifdefs.
- Moved extern declarations for fewer lines of code and better readability.
- The IS_ENABLED(CONFIG_NVRAM) tests were moved to this patch, because it is
now in this patch that CONFIG_HAVE_ARCH_NVRAM_OPS is enabled for Macs.
---
arch/m68k/Kconfig |2
arch/m68k/atari/nvram.c | 21 ++--
arch/m68k/kernel/setup_mm.c | 107
arch/m68k/mac/misc.c| 18 +++
4 files changed, 131 insertions(+), 17 deletions(-)
Index: linux/arch/m68k/mac/misc.c
===
--- linux.orig/arch/m68k/mac/misc.c 2015-06-28 11:41:55.0 +1000
+++ linux/arch/m68k/mac/misc.c 2015-06-28 11:41:56.0 +1000
@@ -61,6 +61,7 @@ static void cuda_write_time(long data)
cuda_poll();
}
+#if IS_ENABLED(CONFIG_NVRAM)
static unsigned char cuda_pram_read_byte(int offset)
{
struct adb_request req;
@@ -81,6 +82,8 @@ static void cuda_pram_write_byte(unsigne
while (!req.complete)
cuda_poll();
}
+#endif /* CONFIG_NVRAM */
+
#else
#define cuda_read_time() 0
#define cuda_write_time(n)
@@ -116,6 +119,7 @@ static void pmu_write_time(long data)
pmu_poll();
}
+#if IS_ENABLED(CONFIG_NVRAM)
static unsigned char pmu_pram_read_byte(int offset)
{
struct adb_request req;
@@ -139,6 +143,8 @@ static void pmu_pram_write_byte(unsigned
while (!req.complete)
pmu_poll();
}
+#endif /* CONFIG_NVRAM */
+
#else
#define pmu_read_time() 0
#define pmu_write_time(n)
@@ -172,6 +178,7 @@ static void maciisi_write_time(long data
(data 8) 0xFF, data 0xFF);
}
+#if IS_ENABLED(CONFIG_NVRAM)
static unsigned char maciisi_pram_read_byte(int offset)
{
struct adb_request req;
@@ -187,6 +194,8 @@ static void maciisi_pram_write_byte(unsi
maciisi_request(req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
(offset 8) 0xFF, offset 0xFF, data);
}
+#endif /* CONFIG_NVRAM */
+
#else
#define maciisi_read_time() 0
#define maciisi_write_time(n)
@@ -314,6 +323,7 @@ static void via_rtc_command(int command,
local_irq_restore(flags);
}
+#if IS_ENABLED(CONFIG_NVRAM)
static unsigned char via_pram_read_byte(int offset)
{
unsigned char temp;
@@ -336,6 +346,7 @@ static void via_pram_write_byte(unsigned
temp = 0x55 | RTC_FLG_WRITE_PROTECT;
via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), temp);
}
+#endif /* CONFIG_NVRAM */
/*
* Return the current time in seconds since January 1, 1904.
@@ -503,6 +514,7 @@ void pmu_shutdown(void)
*---
*/
+#if IS_ENABLED(CONFIG_NVRAM)
unsigned char mac_pram_read_byte(int addr)
{
unsigned char (*func)(int);
@@ -550,6 +562,12 @@ void mac_pram_write_byte(unsigned char v
(*func)(val, addr);
}
+ssize_t mac_pram_get_size(void)
+{
+ return 256;
+}
+#endif /* CONFIG_NVRAM */
+
void mac_poweroff(void)
{
/*
Index: linux/arch/m68k/atari/nvram.c
===
--- linux.orig/arch/m68k/atari/nvram.c 2015-06-28 11:41:48.0 +1000
+++ linux/arch/m68k/atari/nvram.c 2015-06-28 11:41:56.0 +1000
@@ -73,7 +73,7 @@ static void __nvram_set_checksum(void)
__nvram_write_byte(sum, ATARI_CKS_LOC + 1);
}
-static long nvram_set_checksum(void)
+long atari_nvram_set_checksum(void)
{
spin_lock_irq(rtc_lock);
__nvram_set_checksum();
@@ -81,7 +81,7 @@ static long nvram_set_checksum(void)
return 0;
}
-static long nvram_initialize(void)
+long atari_nvram_initialize(void)
{
loff_t i;
@@ -93,7 +93,7 @@ static long nvram_initialize(void)
return 0;
}
-static ssize_t nvram_read(char *buf, size_t count, loff_t *ppos)
+ssize_t atari_nvram_read(char *buf, size_t count, loff_t *ppos)
{
char *p = buf;
loff_t i;
@@ -114,7 +114,7 @@ static ssize_t nvram_read(char *buf, siz
return p - buf;
}
-static ssize_t nvram_write(char *buf, size_t count, loff_t *ppos)
+ssize_t atari_nvram_write(char *buf, size_t count, loff_t *ppos)
{
char *p = buf;
loff_t i;
@@ -137,22 +137,11 @@ static ssize_t nvram_write(char *buf, si
return p - buf;
}
-static ssize_t nvram_get_size(void)
+ssize_t atari_nvram_get_size(void)
{
- if (!MACH_IS_ATARI)
- return -ENODEV;
return NVRAM_BYTES;
}
-const struct nvram_ops arch_nvram_ops = {
-
[RFC v3 20/24] powerpc: Adopt nvram module for PPC64
Adopt nvram module to reduce code duplication.
The IOC_NVRAM_GET_OFFSET ioctl as implemented on PPC64 validates the offset
returned by pmac_get_partition(). Add this test to the nvram module.
Note that the old PPC32 generic_nvram module lacked this test.
So when CONFIG_PPC32 CONFIG_PPC_PMAC, the IOC_NVRAM_GET_OFFSET ioctl
would have returned 0 (always). But when CONFIG_PPC64 CONFIG_PPC_PMAC,
the IOC_NVRAM_GET_OFFSET ioctl would have returned -1 (which is -EPERM)
when the requested partition was not found.
With this patch, the result is now -EINVAL on both PPC32 and PPC64 when
the requested PowerMac NVRAM partition is not found.
This is a userspace-visible change, in the non-existent partition case,
which would be in an error path for an IOC_NVRAM_GET_OFFSET ioctl syscall.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
BTW, the IOC_NVRAM_SYNC ioctl call returns -EINVAL on PPC64. This patch
retains this behaviour though it might be better to actually perform a sync.
Both PPC64 and PPC32 kernels implement ppc_md.nvram_sync() for Core99,
but on PPC64 the ioctl is unimplemented (unlike PPC32).
---
Changed since v1:
- The -ENOENT that appeared in v1 was changed to -EINVAL, to be
consistent with existing logic, that is,
if (part pmac_nvram_OF || part pmac_nvram_NR)
return -EINVAL;
---
arch/powerpc/Kconfig |3
arch/powerpc/kernel/nvram_64.c | 203 ---
arch/powerpc/platforms/powermac/Makefile |5
arch/powerpc/platforms/powermac/setup.c |2
drivers/char/nvram.c |2
5 files changed, 36 insertions(+), 179 deletions(-)
Index: linux/arch/powerpc/Kconfig
===
--- linux.orig/arch/powerpc/Kconfig 2015-06-28 11:41:49.0 +1000
+++ linux/arch/powerpc/Kconfig 2015-06-28 11:41:52.0 +1000
@@ -177,10 +177,9 @@ config SYSVIPC_COMPAT
depends on COMPAT SYSVIPC
default y
-# All PPC32s use generic nvram driver through ppc_md
config HAVE_ARCH_NVRAM_OPS
bool
- default y if PPC32
+ default y
config SCHED_OMIT_FRAME_POINTER
bool
Index: linux/arch/powerpc/kernel/nvram_64.c
===
--- linux.orig/arch/powerpc/kernel/nvram_64.c 2015-06-28 11:41:27.0
+1000
+++ linux/arch/powerpc/kernel/nvram_64.c2015-06-28 11:41:52.0
+1000
@@ -7,12 +7,6 @@
* 2 of the License, or (at your option) any later version.
*
* /dev/nvram driver for PPC64
- *
- * This perhaps should live in drivers/char
- *
- * TODO: Split the /dev/nvram part (that one can use
- * drivers/char/generic_nvram.c) from the arch partition
- * parsing code.
*/
#include linux/module.h
@@ -731,153 +725,6 @@ static void oops_to_nvram(struct kmsg_du
spin_unlock_irqrestore(lock, flags);
}
-static loff_t dev_nvram_llseek(struct file *file, loff_t offset, int origin)
-{
- int size;
-
- if (ppc_md.nvram_size == NULL)
- return -ENODEV;
- size = ppc_md.nvram_size();
-
- switch (origin) {
- case 1:
- offset += file-f_pos;
- break;
- case 2:
- offset += size;
- break;
- }
- if (offset 0)
- return -EINVAL;
- file-f_pos = offset;
- return file-f_pos;
-}
-
-
-static ssize_t dev_nvram_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
-{
- ssize_t ret;
- char *tmp = NULL;
- ssize_t size;
-
- if (!ppc_md.nvram_size) {
- ret = -ENODEV;
- goto out;
- }
-
- size = ppc_md.nvram_size();
- if (size 0) {
- ret = size;
- goto out;
- }
-
- if (*ppos = size) {
- ret = 0;
- goto out;
- }
-
- count = min_t(size_t, count, size - *ppos);
- count = min(count, PAGE_SIZE);
-
- tmp = kmalloc(count, GFP_KERNEL);
- if (!tmp) {
- ret = -ENOMEM;
- goto out;
- }
-
- ret = ppc_md.nvram_read(tmp, count, ppos);
- if (ret = 0)
- goto out;
-
- if (copy_to_user(buf, tmp, ret))
- ret = -EFAULT;
-
-out:
- kfree(tmp);
- return ret;
-
-}
-
-static ssize_t dev_nvram_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- ssize_t ret;
- char *tmp = NULL;
- ssize_t size;
-
- ret = -ENODEV;
- if (!ppc_md.nvram_size)
- goto out;
-
- ret = 0;
- size = ppc_md.nvram_size();
- if (*ppos = size || size 0)
- goto out;
-
- count = min_t(size_t, count, size - *ppos);
- count = min(count, PAGE_SIZE);
-
- ret = -ENOMEM;
- tmp = kmalloc(count, GFP_KERNEL);
-
Re: [PATCH] ASoC: fsl_ssi: fix AC'97 mode
Hi Maciej, On Sat, Jun 27, 2015 at 7:51 PM, Maciej S. Szmigiero m...@maciej.szmigiero.name wrote: Currently the AC'97 mode in fsl_ssi driver isn't functional. Thanks for the fix. I look forward to test it on my udoo board. This patch implements the following changes to make it work properly: * IPG clock have to be enabled during AC'97 CODEC register access, * AC'97 DAI driver struct need the same probe method as I2S one to setup DMA params, * AC'97 bus can support asymmetric playback/capture rates, * Check whether setting AC'97 ops succeeded and clean them on removal so the driver can be reloaded, * AC'97 CODEC will be instantiated in AC'97 mode, * Set DAI format function small fixes in AC'97 mode. It seems like a lot of changes in a single patch. Care to split it into smaller pieces? Thanks ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
Re: [PATCH] ASoC: fsl_ssi: fix AC'97 mode
On Sat, Jun 27, 2015 at 7:51 PM, Maciej S. Szmigiero
m...@maciej.szmigiero.name wrote:
+
+ ret = clk_prepare_enable(fsl_ac97_data-clk);
+ if (ret) {
+ pr_err(ac97 read clk_prepare_enable failed: %d\n,
+ ret);
+ return -1;
'return ret' would be better here.
Thanks
___
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
[RFC v3 02/24] m68k/atari: Move Atari-specific code out of drivers/char/nvram.c
Move the m68k-specific code elsewhere to make the driver generic.
Change the vmode calculation from logical OR to bitwise OR, since it is
obviously wrong.
Signed-off-by: Finn Thain fth...@telegraphics.com.au
---
BTW, I didn't change the SCSI ID location in NVRAM. This code says 16
whereas atari_scsi says 14. Which one is correct?
---
arch/m68k/atari/Makefile |2
arch/m68k/atari/nvram.c | 255 ++
drivers/char/nvram.c | 280 +--
3 files changed, 292 insertions(+), 245 deletions(-)
Index: linux/arch/m68k/atari/nvram.c
===
--- /dev/null 1970-01-01 00:00:00.0 +
+++ linux/arch/m68k/atari/nvram.c 2015-06-28 11:41:29.0 +1000
@@ -0,0 +1,255 @@
+/*
+ * CMOS/NV-RAM driver for Atari. Adapted from drivers/char/nvram.c.
+ * Copyright (C) 1997 Roman Hodek roman.ho...@informatik.uni-erlangen.de
+ * idea by and with help from Richard Jelinek r...@suse.de
+ * Portions copyright (c) 2001,2002 Sun Microsystems (thoc...@sun.com)
+ * Further contributions from Cesar Barros, Erik Gilling, Tim Hockin and
+ * Wim Van Sebroeck.
+ */
+
+#include linux/errno.h
+#include linux/init.h
+#include linux/mc146818rtc.h
+#include linux/module.h
+#include linux/nvram.h
+#include linux/proc_fs.h
+#include linux/seq_file.h
+#include linux/spinlock.h
+#include linux/types.h
+#include asm/atarihw.h
+#include asm/atariints.h
+
+#define NVRAM_BYTES50
+
+/* It is worth noting that these functions all access bytes of general
+ * purpose memory in the NVRAM - that is to say, they all add the
+ * NVRAM_FIRST_BYTE offset. Pass them offsets into NVRAM as if you did not
+ * know about the RTC cruft.
+ */
+
+/* Note that *all* calls to CMOS_READ and CMOS_WRITE must be done with
+ * rtc_lock held. Due to the index-port/data-port design of the RTC, we
+ * don't want two different things trying to get to it at once. (e.g. the
+ * periodic 11 min sync from kernel/time/ntp.c vs. this driver.)
+ */
+
+unsigned char __nvram_read_byte(int i)
+{
+ return CMOS_READ(NVRAM_FIRST_BYTE + i);
+}
+
+unsigned char nvram_read_byte(int i)
+{
+ unsigned long flags;
+ unsigned char c;
+
+ spin_lock_irqsave(rtc_lock, flags);
+ c = __nvram_read_byte(i);
+ spin_unlock_irqrestore(rtc_lock, flags);
+ return c;
+}
+EXPORT_SYMBOL(nvram_read_byte);
+
+/* This races nicely with trying to read with checksum checking */
+void __nvram_write_byte(unsigned char c, int i)
+{
+ CMOS_WRITE(c, NVRAM_FIRST_BYTE + i);
+}
+
+void nvram_write_byte(unsigned char c, int i)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(rtc_lock, flags);
+ __nvram_write_byte(c, i);
+ spin_unlock_irqrestore(rtc_lock, flags);
+}
+
+/* On Ataris, the checksum is over all bytes except the checksum bytes
+ * themselves; these are at the very end.
+ */
+#define ATARI_CKS_RANGE_START 0
+#define ATARI_CKS_RANGE_END47
+#define ATARI_CKS_LOC 48
+
+int __nvram_check_checksum(void)
+{
+ int i;
+ unsigned char sum = 0;
+
+ for (i = ATARI_CKS_RANGE_START; i = ATARI_CKS_RANGE_END; ++i)
+ sum += __nvram_read_byte(i);
+ return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum 0xff))
+ (__nvram_read_byte(ATARI_CKS_LOC + 1) == (sum 0xff));
+}
+
+int nvram_check_checksum(void)
+{
+ unsigned long flags;
+ int rv;
+
+ spin_lock_irqsave(rtc_lock, flags);
+ rv = __nvram_check_checksum();
+ spin_unlock_irqrestore(rtc_lock, flags);
+ return rv;
+}
+EXPORT_SYMBOL(nvram_check_checksum);
+
+static void __nvram_set_checksum(void)
+{
+ int i;
+ unsigned char sum = 0;
+
+ for (i = ATARI_CKS_RANGE_START; i = ATARI_CKS_RANGE_END; ++i)
+ sum += __nvram_read_byte(i);
+ __nvram_write_byte(~sum, ATARI_CKS_LOC);
+ __nvram_write_byte(sum, ATARI_CKS_LOC + 1);
+}
+
+#ifdef CONFIG_PROC_FS
+static struct {
+ unsigned char val;
+ char *name;
+} boot_prefs[] = {
+ { 0x80, TOS },
+ { 0x40, ASV },
+ { 0x20, NetBSD (?) },
+ { 0x10, Linux },
+ { 0x00, unspecified },
+};
+
+static char *languages[] = {
+ English (US),
+ German,
+ French,
+ English (UK),
+ Spanish,
+ Italian,
+ 6 (undefined),
+ Swiss (French),
+ Swiss (German),
+};
+
+static char *dateformat[] = {
+ MM%cDD%cYY,
+ DD%cMM%cYY,
+ YY%cMM%cDD,
+ YY%cDD%cMM,
+ 4 (undefined),
+ 5 (undefined),
+ 6 (undefined),
+ 7 (undefined),
+};
+
+static char *colors[] = {
+ 2, 4, 16, 256, 65536, ??, ??, ??
+};
+
+static void atari_nvram_proc_read(unsigned char *nvram, struct seq_file *seq,
+ void *offset)
+{
+ int checksum;
+ int i;
+ unsigned vmode;
+
+ spin_lock_irq(rtc_lock);
+ checksum =
[RFC v3 12/24] powerpc: Cleanup nvram includes
The nvram_read_byte() and nvram_write_byte() definitions in asm/nvram.h duplicate those in linux/nvram.h. Get rid of the former to prepare for adoption of struct arch_nvram_ops (which is defined in linux/nvram.h for general use). Signed-off-by: Finn Thain fth...@telegraphics.com.au --- arch/powerpc/include/asm/nvram.h |3 --- arch/powerpc/kernel/setup_32.c |1 + drivers/char/generic_nvram.c |4 +++- drivers/video/fbdev/matrox/matroxfb_base.c |2 +- 4 files changed, 5 insertions(+), 5 deletions(-) Index: linux/arch/powerpc/include/asm/nvram.h === --- linux.orig/arch/powerpc/include/asm/nvram.h 2015-06-28 11:41:27.0 +1000 +++ linux/arch/powerpc/include/asm/nvram.h 2015-06-28 11:41:41.0 +1000 @@ -101,7 +101,4 @@ extern int nvram_write_os_partition(stru /* Determine NVRAM size */ extern ssize_t nvram_get_size(void); -/* Normal access to NVRAM */ -extern unsigned char nvram_read_byte(int i); -extern void nvram_write_byte(unsigned char c, int i); #endif /* _ASM_POWERPC_NVRAM_H */ Index: linux/arch/powerpc/kernel/setup_32.c === --- linux.orig/arch/powerpc/kernel/setup_32.c 2015-06-28 11:41:27.0 +1000 +++ linux/arch/powerpc/kernel/setup_32.c2015-06-28 11:41:41.0 +1000 @@ -16,6 +16,7 @@ #include linux/cpu.h #include linux/console.h #include linux/memblock.h +#include linux/nvram.h #include asm/io.h #include asm/prom.h Index: linux/drivers/char/generic_nvram.c === --- linux.orig/drivers/char/generic_nvram.c 2015-06-28 11:41:27.0 +1000 +++ linux/drivers/char/generic_nvram.c 2015-06-28 11:41:41.0 +1000 @@ -20,9 +20,11 @@ #include linux/fcntl.h #include linux/init.h #include linux/mutex.h +#include linux/nvram.h #include asm/uaccess.h -#include asm/nvram.h + #ifdef CONFIG_PPC_PMAC +#include asm/nvram.h #include asm/machdep.h #endif Index: linux/drivers/video/fbdev/matrox/matroxfb_base.c === --- linux.orig/drivers/video/fbdev/matrox/matroxfb_base.c 2015-06-28 11:41:27.0 +1000 +++ linux/drivers/video/fbdev/matrox/matroxfb_base.c2015-06-28 11:41:41.0 +1000 @@ -111,12 +111,12 @@ #include matroxfb_g450.h #include linux/matroxfb.h #include linux/interrupt.h +#include linux/nvram.h #include linux/slab.h #include linux/uaccess.h #ifdef CONFIG_PPC_PMAC #include asm/machdep.h -unsigned char nvram_read_byte(int); static int default_vmode = VMODE_NVRAM; static int default_cmode = CMODE_NVRAM; #endif ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
Re: [PATCH] ASoC: fsl_ssi: fix AC'97 mode
Maciej S. Szmigiero wrote:
+ if (newbinding fsl_ssi_is_ac97(ssi_private)) {
Is the newbinding necessary? I thought only the original PowerPC
device trees were the only one that have the old binding, and they never
supported AC97.
___
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