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-rw-r--r--drivers/i2c/busses/Kconfig11
-rw-r--r--drivers/i2c/busses/i2c-ali1535.c4
-rw-r--r--drivers/i2c/busses/i2c-amd756-s4882.c13
-rw-r--r--drivers/i2c/busses/i2c-frodo.c85
-rw-r--r--drivers/i2c/busses/i2c-iop3xx.c9
-rw-r--r--drivers/i2c/busses/i2c-isa.c2
-rw-r--r--drivers/i2c/busses/i2c-ite.c4
-rw-r--r--drivers/i2c/busses/i2c-ixp4xx.c1
-rw-r--r--drivers/i2c/busses/i2c-mpc.c5
-rw-r--r--drivers/i2c/busses/i2c-mv64xxx.c4
-rw-r--r--drivers/i2c/busses/i2c-piix4.c4
-rw-r--r--drivers/i2c/busses/i2c-pxa.c2
-rw-r--r--drivers/i2c/busses/scx200_acb.c283
13 files changed, 175 insertions, 252 deletions
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index ff92735c7c85..089c6f5b24de 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -168,12 +168,14 @@ config I2C_PIIX4
help
If you say yes to this option, support will be included for the Intel
PIIX4 family of mainboard I2C interfaces. Specifically, the following
- versions of the chipset are supported:
+ versions of the chipset are supported (note that Serverworks is part
+ of Broadcom):
Intel PIIX4
Intel 440MX
Serverworks OSB4
Serverworks CSB5
Serverworks CSB6
+ Serverworks HT-1000
SMSC Victory66
This driver can also be built as a module. If so, the module
@@ -389,10 +391,11 @@ config SCx200_I2C_SDA
also be specified with a module parameter.
config SCx200_ACB
- tristate "NatSemi SCx200 ACCESS.bus"
- depends on I2C && PCI
+ tristate "Geode ACCESS.bus support"
+ depends on X86_32 && I2C && PCI
help
- Enable the use of the ACCESS.bus controllers of a SCx200 processor.
+ Enable the use of the ACCESS.bus controllers on the Geode SCx200 and
+ SC1100 processors and the CS5535 and CS5536 Geode companion devices.
If you don't know what to do here, say N.
diff --git a/drivers/i2c/busses/i2c-ali1535.c b/drivers/i2c/busses/i2c-ali1535.c
index 3eb47890db40..d3ef46aeeb3c 100644
--- a/drivers/i2c/busses/i2c-ali1535.c
+++ b/drivers/i2c/busses/i2c-ali1535.c
@@ -63,7 +63,6 @@
#include <linux/i2c.h>
#include <linux/init.h>
#include <asm/io.h>
-#include <asm/semaphore.h>
/* ALI1535 SMBus address offsets */
@@ -136,7 +135,6 @@
static struct pci_driver ali1535_driver;
static unsigned short ali1535_smba;
-static DECLARE_MUTEX(i2c_ali1535_sem);
/* Detect whether a ALI1535 can be found, and initialize it, where necessary.
Note the differences between kernels with the old PCI BIOS interface and
@@ -345,7 +343,6 @@ static s32 ali1535_access(struct i2c_adapter *adap, u16 addr,
int timeout;
s32 result = 0;
- down(&i2c_ali1535_sem);
/* make sure SMBus is idle */
temp = inb_p(SMBHSTSTS);
for (timeout = 0;
@@ -460,7 +457,6 @@ static s32 ali1535_access(struct i2c_adapter *adap, u16 addr,
break;
}
EXIT:
- up(&i2c_ali1535_sem);
return result;
}
diff --git a/drivers/i2c/busses/i2c-amd756-s4882.c b/drivers/i2c/busses/i2c-amd756-s4882.c
index 56c7d987590f..08e915730caf 100644
--- a/drivers/i2c/busses/i2c-amd756-s4882.c
+++ b/drivers/i2c/busses/i2c-amd756-s4882.c
@@ -38,6 +38,7 @@
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/i2c.h>
+#include <linux/mutex.h>
extern struct i2c_adapter amd756_smbus;
@@ -45,7 +46,7 @@ static struct i2c_adapter *s4882_adapter;
static struct i2c_algorithm *s4882_algo;
/* Wrapper access functions for multiplexed SMBus */
-static struct semaphore amd756_lock;
+static DEFINE_MUTEX(amd756_lock);
static s32 amd756_access_virt0(struct i2c_adapter * adap, u16 addr,
unsigned short flags, char read_write,
@@ -59,12 +60,12 @@ static s32 amd756_access_virt0(struct i2c_adapter * adap, u16 addr,
|| addr == 0x18)
return -1;
- down(&amd756_lock);
+ mutex_lock(&amd756_lock);
error = amd756_smbus.algo->smbus_xfer(adap, addr, flags, read_write,
command, size, data);
- up(&amd756_lock);
+ mutex_unlock(&amd756_lock);
return error;
}
@@ -87,7 +88,7 @@ static inline s32 amd756_access_channel(struct i2c_adapter * adap, u16 addr,
if (addr != 0x4c && (addr & 0xfc) != 0x50 && (addr & 0xfc) != 0x30)
return -1;
- down(&amd756_lock);
+ mutex_lock(&amd756_lock);
if (last_channels != channels) {
union i2c_smbus_data mplxdata;
@@ -105,7 +106,7 @@ static inline s32 amd756_access_channel(struct i2c_adapter * adap, u16 addr,
command, size, data);
UNLOCK:
- up(&amd756_lock);
+ mutex_unlock(&amd756_lock);
return error;
}
@@ -166,8 +167,6 @@ static int __init amd756_s4882_init(void)
}
printk(KERN_INFO "Enabling SMBus multiplexing for Tyan S4882\n");
- init_MUTEX(&amd756_lock);
-
/* Define the 5 virtual adapters and algorithms structures */
if (!(s4882_adapter = kzalloc(5 * sizeof(struct i2c_adapter),
GFP_KERNEL))) {
diff --git a/drivers/i2c/busses/i2c-frodo.c b/drivers/i2c/busses/i2c-frodo.c
deleted file mode 100644
index b6f52f5a4138..000000000000
--- a/drivers/i2c/busses/i2c-frodo.c
+++ /dev/null
@@ -1,85 +0,0 @@
-
-/*
- * linux/drivers/i2c/i2c-frodo.c
- *
- * Author: Abraham van der Merwe <abraham@2d3d.co.za>
- *
- * An I2C adapter driver for the 2d3D, Inc. StrongARM SA-1110
- * Development board (Frodo).
- *
- * This source code is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/i2c.h>
-#include <linux/i2c-algo-bit.h>
-#include <asm/hardware.h>
-
-
-static void frodo_setsda (void *data,int state)
-{
- if (state)
- FRODO_CPLD_I2C |= FRODO_I2C_SDA_OUT;
- else
- FRODO_CPLD_I2C &= ~FRODO_I2C_SDA_OUT;
-}
-
-static void frodo_setscl (void *data,int state)
-{
- if (state)
- FRODO_CPLD_I2C |= FRODO_I2C_SCL_OUT;
- else
- FRODO_CPLD_I2C &= ~FRODO_I2C_SCL_OUT;
-}
-
-static int frodo_getsda (void *data)
-{
- return ((FRODO_CPLD_I2C & FRODO_I2C_SDA_IN) != 0);
-}
-
-static int frodo_getscl (void *data)
-{
- return ((FRODO_CPLD_I2C & FRODO_I2C_SCL_IN) != 0);
-}
-
-static struct i2c_algo_bit_data bit_frodo_data = {
- .setsda = frodo_setsda,
- .setscl = frodo_setscl,
- .getsda = frodo_getsda,
- .getscl = frodo_getscl,
- .udelay = 80,
- .mdelay = 80,
- .timeout = HZ
-};
-
-static struct i2c_adapter frodo_ops = {
- .owner = THIS_MODULE,
- .id = I2C_HW_B_FRODO,
- .algo_data = &bit_frodo_data,
- .dev = {
- .name = "Frodo adapter driver",
- },
-};
-
-static int __init i2c_frodo_init (void)
-{
- return i2c_bit_add_bus(&frodo_ops);
-}
-
-static void __exit i2c_frodo_exit (void)
-{
- i2c_bit_del_bus(&frodo_ops);
-}
-
-MODULE_AUTHOR ("Abraham van der Merwe <abraham@2d3d.co.za>");
-MODULE_DESCRIPTION ("I2C-Bus adapter routines for Frodo");
-MODULE_LICENSE ("GPL");
-
-module_init (i2c_frodo_init);
-module_exit (i2c_frodo_exit);
-
diff --git a/drivers/i2c/busses/i2c-iop3xx.c b/drivers/i2c/busses/i2c-iop3xx.c
index 1414851a17b8..d00a02fc23e4 100644
--- a/drivers/i2c/busses/i2c-iop3xx.c
+++ b/drivers/i2c/busses/i2c-iop3xx.c
@@ -434,7 +434,7 @@ static int
iop3xx_i2c_probe(struct platform_device *pdev)
{
struct resource *res;
- int ret;
+ int ret, irq;
struct i2c_adapter *new_adapter;
struct i2c_algo_iop3xx_data *adapter_data;
@@ -470,7 +470,12 @@ iop3xx_i2c_probe(struct platform_device *pdev)
goto release_region;
}
- ret = request_irq(platform_get_irq(pdev, 0), iop3xx_i2c_irq_handler, 0,
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ ret = -ENXIO;
+ goto unmap;
+ }
+ ret = request_irq(irq, iop3xx_i2c_irq_handler, 0,
pdev->name, adapter_data);
if (ret) {
diff --git a/drivers/i2c/busses/i2c-isa.c b/drivers/i2c/busses/i2c-isa.c
index 4344ae6b1fcb..c3e1d3e888d7 100644
--- a/drivers/i2c/busses/i2c-isa.c
+++ b/drivers/i2c/busses/i2c-isa.c
@@ -125,7 +125,7 @@ int i2c_isa_del_driver(struct i2c_driver *driver)
static int __init i2c_isa_init(void)
{
- init_MUTEX(&isa_adapter.clist_lock);
+ mutex_init(&isa_adapter.clist_lock);
INIT_LIST_HEAD(&isa_adapter.clients);
isa_adapter.nr = ANY_I2C_ISA_BUS;
diff --git a/drivers/i2c/busses/i2c-ite.c b/drivers/i2c/busses/i2c-ite.c
index 5f5d2944808b..d82e6dae8407 100644
--- a/drivers/i2c/busses/i2c-ite.c
+++ b/drivers/i2c/busses/i2c-ite.c
@@ -200,9 +200,7 @@ static struct i2c_adapter iic_ite_ops = {
.owner = THIS_MODULE,
.id = I2C_HW_I_IIC,
.algo_data = &iic_ite_data,
- .dev = {
- .name = "ITE IIC adapter",
- },
+ .name = "ITE IIC adapter",
};
/* Called when the module is loaded. This function starts the
diff --git a/drivers/i2c/busses/i2c-ixp4xx.c b/drivers/i2c/busses/i2c-ixp4xx.c
index e422d8b2d4d6..2ed07112d683 100644
--- a/drivers/i2c/busses/i2c-ixp4xx.c
+++ b/drivers/i2c/busses/i2c-ixp4xx.c
@@ -126,6 +126,7 @@ static int ixp4xx_i2c_probe(struct platform_device *plat_dev)
drv_data->algo_data.timeout = 100;
drv_data->adapter.id = I2C_HW_B_IXP4XX;
+ drv_data->adapter.class = I2C_CLASS_HWMON;
strlcpy(drv_data->adapter.name, plat_dev->dev.driver->name,
I2C_NAME_SIZE);
drv_data->adapter.algo_data = &drv_data->algo_data;
diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
index 5ccd338a9dc9..2721e4c8184a 100644
--- a/drivers/i2c/busses/i2c-mpc.c
+++ b/drivers/i2c/busses/i2c-mpc.c
@@ -302,6 +302,10 @@ static int fsl_i2c_probe(struct platform_device *pdev)
}
i2c->irq = platform_get_irq(pdev, 0);
+ if (i2c->irq < 0) {
+ result = -ENXIO;
+ goto fail_get_irq;
+ }
i2c->flags = pdata->device_flags;
init_waitqueue_head(&i2c->queue);
@@ -340,6 +344,7 @@ static int fsl_i2c_probe(struct platform_device *pdev)
fail_irq:
iounmap(i2c->base);
fail_map:
+ fail_get_irq:
kfree(i2c);
return result;
};
diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c
index 22781d84f79f..ac5cde1bbd2b 100644
--- a/drivers/i2c/busses/i2c-mv64xxx.c
+++ b/drivers/i2c/busses/i2c-mv64xxx.c
@@ -516,6 +516,10 @@ mv64xxx_i2c_probe(struct platform_device *pd)
drv_data->freq_m = pdata->freq_m;
drv_data->freq_n = pdata->freq_n;
drv_data->irq = platform_get_irq(pd, 0);
+ if (drv_data->irq < 0) {
+ rc = -ENXIO;
+ goto exit_unmap_regs;
+ }
drv_data->adapter.id = I2C_HW_MV64XXX;
drv_data->adapter.algo = &mv64xxx_i2c_algo;
drv_data->adapter.owner = THIS_MODULE;
diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index 692f47345481..d9c7c00e71f9 100644
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -22,7 +22,7 @@
/*
Supports:
Intel PIIX4, 440MX
- Serverworks OSB4, CSB5, CSB6
+ Serverworks OSB4, CSB5, CSB6, HT-1000
SMSC Victory66
Note: we assume there can only be one device, with one SMBus interface.
@@ -419,6 +419,8 @@ static struct pci_device_id piix4_ids[] = {
.driver_data = 0 },
{ PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6),
.driver_data = 0 },
+ { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000SB),
+ .driver_data = 0 },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443MX_3),
.driver_data = 3 },
{ PCI_DEVICE(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_3),
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index 7579f4b256a8..5155010b455e 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -647,7 +647,7 @@ static inline void i2c_pxa_start_message(struct pxa_i2c *i2c)
}
/*
- * We are protected by the adapter bus semaphore.
+ * We are protected by the adapter bus mutex.
*/
static int i2c_pxa_do_xfer(struct pxa_i2c *i2c, struct i2c_msg *msg, int num)
{
diff --git a/drivers/i2c/busses/scx200_acb.c b/drivers/i2c/busses/scx200_acb.c
index d3478e084522..8bd305e47f0d 100644
--- a/drivers/i2c/busses/scx200_acb.c
+++ b/drivers/i2c/busses/scx200_acb.c
@@ -1,27 +1,26 @@
-/* linux/drivers/i2c/scx200_acb.c
-
+/*
Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
National Semiconductor SCx200 ACCESS.bus support
-
+ Also supports the AMD CS5535 and AMD CS5536
+
Based on i2c-keywest.c which is:
Copyright (c) 2001 Benjamin Herrenschmidt <benh@kernel.crashing.org>
Copyright (c) 2000 Philip Edelbrock <phil@stimpy.netroedge.com>
-
+
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
*/
#include <linux/module.h>
@@ -32,7 +31,9 @@
#include <linux/smp_lock.h>
#include <linux/pci.h>
#include <linux/delay.h>
+#include <linux/mutex.h>
#include <asm/io.h>
+#include <asm/msr.h>
#include <linux/scx200.h>
@@ -47,16 +48,7 @@ static int base[MAX_DEVICES] = { 0x820, 0x840 };
module_param_array(base, int, NULL, 0);
MODULE_PARM_DESC(base, "Base addresses for the ACCESS.bus controllers");
-#ifdef DEBUG
-#define DBG(x...) printk(KERN_DEBUG NAME ": " x)
-#else
-#define DBG(x...)
-#endif
-
-/* The hardware supports interrupt driven mode too, but I haven't
- implemented that. */
-#define POLLED_MODE 1
-#define POLL_TIMEOUT (HZ)
+#define POLL_TIMEOUT (HZ/5)
enum scx200_acb_state {
state_idle,
@@ -79,12 +71,11 @@ static const char *scx200_acb_state_name[] = {
};
/* Physical interface */
-struct scx200_acb_iface
-{
+struct scx200_acb_iface {
struct scx200_acb_iface *next;
struct i2c_adapter adapter;
unsigned base;
- struct semaphore sem;
+ struct mutex mutex;
/* State machine data */
enum scx200_acb_state state;
@@ -100,7 +91,7 @@ struct scx200_acb_iface
#define ACBSDA (iface->base + 0)
#define ACBST (iface->base + 1)
#define ACBST_SDAST 0x40 /* SDA Status */
-#define ACBST_BER 0x20
+#define ACBST_BER 0x20
#define ACBST_NEGACK 0x10 /* Negative Acknowledge */
#define ACBST_STASTR 0x08 /* Stall After Start */
#define ACBST_MASTER 0x02
@@ -109,9 +100,9 @@ struct scx200_acb_iface
#define ACBCTL1 (iface->base + 3)
#define ACBCTL1_STASTRE 0x80
#define ACBCTL1_NMINTE 0x40
-#define ACBCTL1_ACK 0x10
-#define ACBCTL1_STOP 0x02
-#define ACBCTL1_START 0x01
+#define ACBCTL1_ACK 0x10
+#define ACBCTL1_STOP 0x02
+#define ACBCTL1_START 0x01
#define ACBADDR (iface->base + 4)
#define ACBCTL2 (iface->base + 5)
#define ACBCTL2_ENABLE 0x01
@@ -122,8 +113,8 @@ static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status)
{
const char *errmsg;
- DBG("state %s, status = 0x%02x\n",
- scx200_acb_state_name[iface->state], status);
+ dev_dbg(&iface->adapter.dev, "state %s, status = 0x%02x\n",
+ scx200_acb_state_name[iface->state], status);
if (status & ACBST_BER) {
errmsg = "bus error";
@@ -133,8 +124,17 @@ static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status)
errmsg = "not master";
goto error;
}
- if (status & ACBST_NEGACK)
- goto negack;
+ if (status & ACBST_NEGACK) {
+ dev_dbg(&iface->adapter.dev, "negative ack in state %s\n",
+ scx200_acb_state_name[iface->state]);
+
+ iface->state = state_idle;
+ iface->result = -ENXIO;
+
+ outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1);
+ outb(ACBST_STASTR | ACBST_NEGACK, ACBST);
+ return;
+ }
switch (iface->state) {
case state_idle:
@@ -160,10 +160,10 @@ static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status)
case state_repeat_start:
outb(inb(ACBCTL1) | ACBCTL1_START, ACBCTL1);
/* fallthrough */
-
+
case state_quick:
if (iface->address_byte & 1) {
- if (iface->len == 1)
+ if (iface->len == 1)
outb(inb(ACBCTL1) | ACBCTL1_ACK, ACBCTL1);
else
outb(inb(ACBCTL1) & ~ACBCTL1_ACK, ACBCTL1);
@@ -202,26 +202,15 @@ static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status)
outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1);
break;
}
-
+
outb(*iface->ptr++, ACBSDA);
--iface->len;
-
+
break;
}
return;
- negack:
- DBG("negative acknowledge in state %s\n",
- scx200_acb_state_name[iface->state]);
-
- iface->state = state_idle;
- iface->result = -ENXIO;
-
- outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1);
- outb(ACBST_STASTR | ACBST_NEGACK, ACBST);
- return;
-
error:
dev_err(&iface->adapter.dev, "%s in state %s\n", errmsg,
scx200_acb_state_name[iface->state]);
@@ -231,20 +220,9 @@ static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status)
iface->needs_reset = 1;
}
-static void scx200_acb_timeout(struct scx200_acb_iface *iface)
-{
- dev_err(&iface->adapter.dev, "timeout in state %s\n",
- scx200_acb_state_name[iface->state]);
-
- iface->state = state_idle;
- iface->result = -EIO;
- iface->needs_reset = 1;
-}
-
-#ifdef POLLED_MODE
static void scx200_acb_poll(struct scx200_acb_iface *iface)
{
- u8 status = 0;
+ u8 status;
unsigned long timeout;
timeout = jiffies + POLL_TIMEOUT;
@@ -254,17 +232,21 @@ static void scx200_acb_poll(struct scx200_acb_iface *iface)
scx200_acb_machine(iface, status);
return;
}
- msleep(10);
+ yield();
}
- scx200_acb_timeout(iface);
+ dev_err(&iface->adapter.dev, "timeout in state %s\n",
+ scx200_acb_state_name[iface->state]);
+
+ iface->state = state_idle;
+ iface->result = -EIO;
+ iface->needs_reset = 1;
}
-#endif /* POLLED_MODE */
static void scx200_acb_reset(struct scx200_acb_iface *iface)
{
/* Disable the ACCESS.bus device and Configure the SCL
- frequency: 16 clock cycles */
+ frequency: 16 clock cycles */
outb(0x70, ACBCTL2);
/* Polling mode */
outb(0, ACBCTL1);
@@ -283,9 +265,9 @@ static void scx200_acb_reset(struct scx200_acb_iface *iface)
}
static s32 scx200_acb_smbus_xfer(struct i2c_adapter *adapter,
- u16 address, unsigned short flags,
- char rw, u8 command, int size,
- union i2c_smbus_data *data)
+ u16 address, unsigned short flags,
+ char rw, u8 command, int size,
+ union i2c_smbus_data *data)
{
struct scx200_acb_iface *iface = i2c_get_adapdata(adapter);
int len;
@@ -295,53 +277,47 @@ static s32 scx200_acb_smbus_xfer(struct i2c_adapter *adapter,
switch (size) {
case I2C_SMBUS_QUICK:
- len = 0;
- buffer = NULL;
- break;
+ len = 0;
+ buffer = NULL;
+ break;
+
case I2C_SMBUS_BYTE:
- if (rw == I2C_SMBUS_READ) {
- len = 1;
- buffer = &data->byte;
- } else {
- len = 1;
- buffer = &command;
- }
- break;
+ len = 1;
+ buffer = rw ? &data->byte : &command;
+ break;
+
case I2C_SMBUS_BYTE_DATA:
- len = 1;
- buffer = &data->byte;
- break;
+ len = 1;
+ buffer = &data->byte;
+ break;
+
case I2C_SMBUS_WORD_DATA:
len = 2;
- cur_word = cpu_to_le16(data->word);
- buffer = (u8 *)&cur_word;
+ cur_word = cpu_to_le16(data->word);
+ buffer = (u8 *)&cur_word;
break;
+
case I2C_SMBUS_BLOCK_DATA:
- len = data->block[0];
- buffer = &data->block[1];
+ len = data->block[0];
+ buffer = &data->block[1];
break;
+
default:
- return -EINVAL;
+ return -EINVAL;
}
- DBG("size=%d, address=0x%x, command=0x%x, len=%d, read=%d\n",
- size, address, command, len, rw == I2C_SMBUS_READ);
+ dev_dbg(&adapter->dev,
+ "size=%d, address=0x%x, command=0x%x, len=%d, read=%d\n",
+ size, address, command, len, rw);
if (!len && rw == I2C_SMBUS_READ) {
- dev_warn(&adapter->dev, "zero length read\n");
+ dev_dbg(&adapter->dev, "zero length read\n");
return -EINVAL;
}
- if (len && !buffer) {
- dev_warn(&adapter->dev, "nonzero length but no buffer\n");
- return -EFAULT;
- }
-
- down(&iface->sem);
+ mutex_lock(&iface->mutex);
- iface->address_byte = address<<1;
- if (rw == I2C_SMBUS_READ)
- iface->address_byte |= 1;
+ iface->address_byte = (address << 1) | rw;
iface->command = command;
iface->ptr = buffer;
iface->len = len;
@@ -355,25 +331,21 @@ static s32 scx200_acb_smbus_xfer(struct i2c_adapter *adapter,
else
iface->state = state_address;
-#ifdef POLLED_MODE
while (iface->state != state_idle)
scx200_acb_poll(iface);
-#else /* POLLED_MODE */
-#error Interrupt driven mode not implemented
-#endif /* POLLED_MODE */
if (iface->needs_reset)
scx200_acb_reset(iface);
rc = iface->result;
- up(&iface->sem);
+ mutex_unlock(&iface->mutex);
if (rc == 0 && size == I2C_SMBUS_WORD_DATA && rw == I2C_SMBUS_READ)
- data->word = le16_to_cpu(cur_word);
+ data->word = le16_to_cpu(cur_word);
#ifdef DEBUG
- DBG(": transfer done, result: %d", rc);
+ dev_dbg(&adapter->dev, "transfer done, result: %d", rc);
if (buffer) {
int i;
printk(" data:");
@@ -400,17 +372,18 @@ static struct i2c_algorithm scx200_acb_algorithm = {
};
static struct scx200_acb_iface *scx200_acb_list;
+static DECLARE_MUTEX(scx200_acb_list_mutex);
static int scx200_acb_probe(struct scx200_acb_iface *iface)
{
u8 val;
/* Disable the ACCESS.bus device and Configure the SCL
- frequency: 16 clock cycles */
+ frequency: 16 clock cycles */
outb(0x70, ACBCTL2);
if (inb(ACBCTL2) != 0x70) {
- DBG("ACBCTL2 readback failed\n");
+ pr_debug(NAME ": ACBCTL2 readback failed\n");
return -ENXIO;
}
@@ -418,7 +391,8 @@ static int scx200_acb_probe(struct scx200_acb_iface *iface)
val = inb(ACBCTL1);
if (val) {
- DBG("disabled, but ACBCTL1=0x%02x\n", val);
+ pr_debug(NAME ": disabled, but ACBCTL1=0x%02x\n",
+ val);
return -ENXIO;
}
@@ -428,18 +402,19 @@ static int scx200_acb_probe(struct scx200_acb_iface *iface)
val = inb(ACBCTL1);
if ((val & ACBCTL1_NMINTE) != ACBCTL1_NMINTE) {
- DBG("enabled, but NMINTE won't be set, ACBCTL1=0x%02x\n", val);
+ pr_debug(NAME ": enabled, but NMINTE won't be set, "
+ "ACBCTL1=0x%02x\n", val);
return -ENXIO;
}
return 0;
}
-static int __init scx200_acb_create(int base, int index)
+static int __init scx200_acb_create(const char *text, int base, int index)
{
struct scx200_acb_iface *iface;
struct i2c_adapter *adapter;
- int rc = 0;
+ int rc;
char description[64];
iface = kzalloc(sizeof(*iface), GFP_KERNEL);
@@ -451,50 +426,51 @@ static int __init scx200_acb_create(int base, int index)
adapter = &iface->adapter;
i2c_set_adapdata(adapter, iface);
- snprintf(adapter->name, I2C_NAME_SIZE, "SCx200 ACB%d", index);
+ snprintf(adapter->name, I2C_NAME_SIZE, "%s ACB%d", text, index);
adapter->owner = THIS_MODULE;
adapter->id = I2C_HW_SMBUS_SCX200;
adapter->algo = &scx200_acb_algorithm;
adapter->class = I2C_CLASS_HWMON;
- init_MUTEX(&iface->sem);
+ mutex_init(&iface->mutex);
+
+ snprintf(description, sizeof(description), "%s ACCESS.bus [%s]",
+ text, adapter->name);
- snprintf(description, sizeof(description), "NatSemi SCx200 ACCESS.bus [%s]", adapter->name);
if (request_region(base, 8, description) == 0) {
- dev_err(&adapter->dev, "can't allocate io 0x%x-0x%x\n",
+ printk(KERN_ERR NAME ": can't allocate io 0x%x-0x%x\n",
base, base + 8-1);
rc = -EBUSY;
- goto errout;
+ goto errout_free;
}
iface->base = base;
rc = scx200_acb_probe(iface);
if (rc) {
- dev_warn(&adapter->dev, "probe failed\n");
- goto errout;
+ printk(KERN_WARNING NAME ": probe failed\n");
+ goto errout_release;
}
scx200_acb_reset(iface);
if (i2c_add_adapter(adapter) < 0) {
- dev_err(&adapter->dev, "failed to register\n");
+ printk(KERN_ERR NAME ": failed to register\n");
rc = -ENODEV;
- goto errout;
+ goto errout_release;
}
- lock_kernel();
+ down(&scx200_acb_list_mutex);
iface->next = scx200_acb_list;
scx200_acb_list = iface;
- unlock_kernel();
+ up(&scx200_acb_list_mutex);
return 0;
+ errout_release:
+ release_region(iface->base, 8);
+ errout_free:
+ kfree(iface);
errout:
- if (iface) {
- if (iface->base)
- release_region(iface->base, 8);
- kfree(iface);
- }
return rc;
}
@@ -504,50 +480,69 @@ static struct pci_device_id scx200[] = {
{ },
};
+static struct pci_device_id divil_pci[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) },
+ { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
+ { } /* NULL entry */
+};
+
+#define MSR_LBAR_SMB 0x5140000B
+
+static int scx200_add_cs553x(void)
+{
+ u32 low, hi;
+ u32 smb_base;
+
+ /* Grab & reserve the SMB I/O range */
+ rdmsr(MSR_LBAR_SMB, low, hi);
+
+ /* Check the IO mask and whether SMB is enabled */
+ if (hi != 0x0000F001) {
+ printk(KERN_WARNING NAME ": SMBus not enabled\n");
+ return -ENODEV;
+ }
+
+ /* SMBus IO size is 8 bytes */
+ smb_base = low & 0x0000FFF8;
+
+ return scx200_acb_create("CS5535", smb_base, 0);
+}
+
static int __init scx200_acb_init(void)
{
int i;
- int rc;
+ int rc = -ENODEV;
pr_debug(NAME ": NatSemi SCx200 ACCESS.bus Driver\n");
/* Verify that this really is a SCx200 processor */
- if (pci_dev_present(scx200) == 0)
- return -ENODEV;
+ if (pci_dev_present(scx200)) {
+ for (i = 0; i < MAX_DEVICES; ++i) {
+ if (base[i] > 0)
+ rc = scx200_acb_create("SCx200", base[i], i);
+ }
+ } else if (pci_dev_present(divil_pci))
+ rc = scx200_add_cs553x();
- rc = -ENXIO;
- for (i = 0; i < MAX_DEVICES; ++i) {
- if (base[i] > 0)
- rc = scx200_acb_create(base[i], i);
- }
- if (scx200_acb_list)
- return 0;
return rc;
}
static void __exit scx200_acb_cleanup(void)
{
struct scx200_acb_iface *iface;
- lock_kernel();
+
+ down(&scx200_acb_list_mutex);
while ((iface = scx200_acb_list) != NULL) {
scx200_acb_list = iface->next;
- unlock_kernel();
+ up(&scx200_acb_list_mutex);
i2c_del_adapter(&iface->adapter);
release_region(iface->base, 8);
kfree(iface);
- lock_kernel();
+ down(&scx200_acb_list_mutex);
}
- unlock_kernel();
+ up(&scx200_acb_list_mutex);
}
module_init(scx200_acb_init);
module_exit(scx200_acb_cleanup);
-
-/*
- Local variables:
- compile-command: "make -k -C ../.. SUBDIRS=drivers/i2c modules"
- c-basic-offset: 8
- End:
-*/
-
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.