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[src/trunk]: src/sys/external/bsd/drm2 Reorganize Linux i2c header file and a...
details: https://anonhg.NetBSD.org/src/rev/c477d3598b96
branches: trunk
changeset: 806688:c477d3598b96
user: riastradh <riastradh%NetBSD.org@localhost>
date: Thu Mar 05 17:29:18 2015 +0000
description:
Reorganize Linux i2c header file and add a few more shims.
diffstat:
sys/external/bsd/drm2/include/linux/i2c.h | 172 +++++++++++++++++++----------
sys/external/bsd/drm2/linux/linux_i2c.c | 76 ++++++++++++-
2 files changed, 185 insertions(+), 63 deletions(-)
diffs (truncated from 333 to 300 lines):
diff -r ea84acbd719d -r c477d3598b96 sys/external/bsd/drm2/include/linux/i2c.h
--- a/sys/external/bsd/drm2/include/linux/i2c.h Thu Mar 05 17:24:36 2015 +0000
+++ b/sys/external/bsd/drm2/include/linux/i2c.h Thu Mar 05 17:29:18 2015 +0000
@@ -1,7 +1,7 @@
-/* $NetBSD: i2c.h,v 1.7 2015/03/05 15:02:36 riastradh Exp $ */
+/* $NetBSD: i2c.h,v 1.8 2015/03/05 17:29:18 riastradh Exp $ */
/*-
- * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * Copyright (c) 2015 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
@@ -35,20 +35,86 @@
#include <sys/types.h>
#include <sys/device_if.h>
#include <sys/queue.h> /* XXX include order botch: i2cvar.h needs */
+#include <sys/systm.h>
#include <dev/i2c/i2cvar.h>
+#include <linux/pm.h>
+
struct i2c_adapter;
struct i2c_algorithm;
struct i2c_msg;
#define I2C_NAME_SIZE 20
+/*
+ * I2C_M_*: i2c_msg flags
+ */
+#define I2C_M_RD 0x01 /* xfer is read, not write */
+#define I2C_M_NOSTART 0x02 /* don't initiate xfer */
+#define I2C_M_TEN 0x04 /* 10-bit chip address */
+
+/*
+ * I2C_CLASS_*: i2c_adapter classes
+ */
#define I2C_CLASS_DDC 0x01
+/*
+ * I2C_FUNC_*: i2c_adapter functionality bits
+ */
+#define I2C_FUNC_I2C 0x01
+#define I2C_FUNC_NOSTART 0x02
+#define I2C_FUNC_SMBUS_EMUL 0x04
+#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x08
+#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x10
+#define I2C_FUNC_10BIT_ADDR 0x20
+
+/*
+ * struct i2c_msg: A single i2c message request on a particular
+ * address. Read if I2C_M_RD is set, write otherwise.
+ */
+struct i2c_msg {
+ i2c_addr_t addr;
+ uint16_t flags; /* I2C_M_* */
+ uint16_t len;
+ uint8_t *buf;
+};
+
+/*
+ * struct i2c_adapter: An i2c bus controller.
+ */
+struct i2c_adapter {
+ char name[I2C_NAME_SIZE];
+ const struct i2c_algorithm *algo;
+ void *algo_data;
+ int retries;
+ struct module *owner;
+ unsigned int class; /* I2C_CLASS_* */
+ struct {
+ device_t parent;
+ } dev;
+ void *i2ca_adapdata;
+};
+
+/*
+ * struct i2c_algorithm: A procedure for transferring an i2c message on
+ * an i2c bus, along with a set of flags describing its functionality.
+ */
+struct i2c_algorithm {
+ int (*master_xfer)(struct i2c_adapter *, struct i2c_msg *,
+ int);
+ uint32_t (*functionality)(struct i2c_adapter *);
+};
+
+/*
+ * struct i2c_board_info: Parameters to find an i2c bus and a slave on
+ * it. type is the name of an i2c driver; addr is the slave address;
+ * platform_data is an extra parameter to pass to the i2c driver.
+ */
struct i2c_board_info {
char type[I2C_NAME_SIZE];
uint16_t addr;
+ uint16_t flags;
void *platform_data;
};
@@ -56,46 +122,46 @@
.type = (board_type), \
.addr = (board_addr)
-static inline void
-i2c_new_device(const struct i2c_adapter *adapter __unused,
- const struct i2c_board_info *board __unused)
-{
-}
-
-struct i2c_driver {
+/*
+ * struct i2c_client: An i2c slave device at a particular address on a
+ * particular bus.
+ */
+struct i2c_client {
+ struct i2c_adapter *adapter;
+ uint16_t addr;
+ uint16_t flags;
};
-struct module;
-static inline int
-i2c_register_driver(const struct module *owner __unused,
- const struct i2c_driver *driver __unused)
-{
- return 0;
-}
-
-static inline void
-i2c_del_driver(const struct i2c_driver *driver __unused)
-{
-}
-
-struct i2c_client;
-
-struct i2c_adapter {
- char name[I2C_NAME_SIZE];
- const struct i2c_algorithm *algo;
- void *algo_data;
- int retries;
- struct module *owner;
- unsigned int class;
- struct {
- device_t parent;
- } dev;
- void *i2ca_adapdata;
+/*
+ * struct i2c_device_id: Device id naming a class of i2c slave devices
+ * and parameters to the driver for the devices.
+ */
+struct i2c_device_id {
+ char name[I2C_NAME_SIZE];
+ unsigned long driver_data;
};
+/*
+ * struct i2c_driver: A driver for a class of i2c slave devices. We
+ * don't actually use this.
+ */
+struct i2c_driver {
+ int (*probe)(struct i2c_client *, const struct i2c_device_id *);
+ int (*remove)(struct i2c_client *);
+ struct {
+ char name[I2C_NAME_SIZE];
+ const struct dev_pm_ops pm;
+ } driver;
+};
+
+/*
+ * Adapter management. We don't register these in a global database
+ * like Linux, so these are just stubs.
+ */
static inline int
i2c_add_adapter(struct i2c_adapter *adapter __unused)
{
+
return 0;
}
@@ -118,32 +184,18 @@
adapter->i2ca_adapdata = data;
}
-struct i2c_msg {
- i2c_addr_t addr;
- uint16_t flags;
- uint16_t len;
- uint8_t *buf;
-};
-
-#define I2C_M_RD 0x01
-#define I2C_M_NOSTART 0x02
+/* XXX Make the nm output a little more greppable... */
+#define i2c_master_recv linux_i2c_master_recv
+#define i2c_master_send linux_i2c_master_send
+#define i2c_new_device linux_i2c_new_device
+#define i2c_transfer linux_i2c_transfer
+#define i2c_unregister_device linux_i2c_unregister_device
-#define I2C_FUNC_I2C 0x01
-#define I2C_FUNC_NOSTART 0x02
-#define I2C_FUNC_SMBUS_EMUL 0x04
-#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x08
-#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x10
-#define I2C_FUNC_10BIT_ADDR 0x20
-
-struct i2c_algorithm {
- int (*master_xfer)(struct i2c_adapter *, struct i2c_msg *,
- int);
- uint32_t (*functionality)(struct i2c_adapter *);
-};
-
-/* XXX Make the nm output a little more greppable... */
-#define i2c_transfer linux_i2c_transfer
-
+int i2c_master_send(const struct i2c_client *, const char *, int);
+int i2c_master_recv(const struct i2c_client *, char *, int);
+struct i2c_client *
+ i2c_new_device(struct i2c_adapter *, const struct i2c_board_info *);
int i2c_transfer(struct i2c_adapter *, struct i2c_msg *, int);
+void i2c_unregister_device(struct i2c_client *);
#endif /* _LINUX_I2C_H_ */
diff -r ea84acbd719d -r c477d3598b96 sys/external/bsd/drm2/linux/linux_i2c.c
--- a/sys/external/bsd/drm2/linux/linux_i2c.c Thu Mar 05 17:24:36 2015 +0000
+++ b/sys/external/bsd/drm2/linux/linux_i2c.c Thu Mar 05 17:29:18 2015 +0000
@@ -1,7 +1,7 @@
-/* $NetBSD: linux_i2c.c,v 1.2 2014/03/18 18:20:43 riastradh Exp $ */
+/* $NetBSD: linux_i2c.c,v 1.3 2015/03/05 17:29:18 riastradh Exp $ */
/*-
- * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * Copyright (c) 2015 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
@@ -30,10 +30,11 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: linux_i2c.c,v 1.2 2014/03/18 18:20:43 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: linux_i2c.c,v 1.3 2015/03/05 17:29:18 riastradh Exp $");
#include <sys/types.h>
#include <sys/errno.h>
+#include <sys/kmem.h>
#include <sys/queue.h> /* XXX include order botch: i2cvar.h needs */
#include <dev/i2c/i2cvar.h>
@@ -56,6 +57,73 @@
static int linux_i2cbb_read_byte(void *, uint8_t *, int);
static int linux_i2cbb_write_byte(void *, uint8_t, int);
+/*
+ * Client operations: operations with a particular i2c slave device.
+ */
+
+struct i2c_client *
+i2c_new_device(struct i2c_adapter *adapter, const struct i2c_board_info *info)
+{
+ struct i2c_client *client;
+
+ client = kmem_alloc(sizeof(*client), KM_SLEEP);
+ client->adapter = adapter;
+ client->addr = info->addr;
+ client->flags = info->flags;
+
+ return client;
+}
+
+void
+i2c_unregister_device(struct i2c_client *client)
+{
+
+ kmem_free(client, sizeof(*client));
+}
+
+int
+i2c_master_send(const struct i2c_client *client, const char *buf, int count)
+{
+ struct i2c_msg msg = {
+ .addr = client->addr,
+ .flags = client->flags & I2C_M_TEN,
+ .len = count,
+ .buf = __UNCONST(buf),
+ };
+ int ret;
+
+ KASSERT(0 <= count);
+
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ if (ret <= 0)
+ return ret;
+
+ return count;
+}
+
+int
+i2c_master_recv(const struct i2c_client *client, char *buf, int count)
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