diff options
| -rw-r--r-- | drivers/w1/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/w1/Makefile | 7 | ||||
| -rw-r--r-- | drivers/w1/ds_w1_bridge.c | 24 | ||||
| -rw-r--r-- | drivers/w1/dscore.c | 161 | ||||
| -rw-r--r-- | drivers/w1/dscore.h | 10 | ||||
| -rw-r--r-- | drivers/w1/w1.c | 302 | ||||
| -rw-r--r-- | drivers/w1/w1.h | 22 | ||||
| -rw-r--r-- | drivers/w1/w1_ds2433.c | 327 | ||||
| -rw-r--r-- | drivers/w1/w1_family.c | 11 | ||||
| -rw-r--r-- | drivers/w1/w1_family.h | 7 | ||||
| -rw-r--r-- | drivers/w1/w1_int.c | 26 | ||||
| -rw-r--r-- | drivers/w1/w1_io.c | 24 | ||||
| -rw-r--r-- | drivers/w1/w1_io.h | 1 | ||||
| -rw-r--r-- | drivers/w1/w1_netlink.c | 26 | ||||
| -rw-r--r-- | drivers/w1/w1_netlink.h | 2 | ||||
| -rw-r--r-- | drivers/w1/w1_smem.c | 49 | ||||
| -rw-r--r-- | drivers/w1/w1_therm.c | 47 | ||||
| -rw-r--r-- | include/linux/crc16.h | 44 | ||||
| -rw-r--r-- | lib/Kconfig | 8 | ||||
| -rw-r--r-- | lib/Makefile | 3 | ||||
| -rw-r--r-- | lib/crc16.c | 67 |
21 files changed, 871 insertions, 313 deletions
diff --git a/drivers/w1/Kconfig b/drivers/w1/Kconfig index 711b90903e7..9a1e00dd3e0 100644 --- a/drivers/w1/Kconfig +++ b/drivers/w1/Kconfig @@ -54,4 +54,20 @@ config W1_SMEM Say Y here if you want to connect 1-wire simple 64bit memory rom(ds2401/ds2411/ds1990*) to you wire. +config W1_DS2433 + tristate "4kb EEPROM family support (DS2433)" + depends on W1 + help + Say Y here if you want to use a 1-wire + 4kb EEPROM family device (DS2433). + +config W1_DS2433_CRC + bool "Protect DS2433 data with a CRC16" + depends on W1_DS2433 + select CRC16 + help + Say Y here to protect DS2433 data with a CRC16. + Each block has 30 bytes of data and a two byte CRC16. + Full block writes are only allowed if the CRC is valid. + endmenu diff --git a/drivers/w1/Makefile b/drivers/w1/Makefile index 80725c348e7..01fb5439147 100644 --- a/drivers/w1/Makefile +++ b/drivers/w1/Makefile @@ -6,6 +6,10 @@ ifneq ($(CONFIG_NET), y) EXTRA_CFLAGS += -DNETLINK_DISABLED endif +ifeq ($(CONFIG_W1_DS2433_CRC), y) +EXTRA_CFLAGS += -DCONFIG_W1_F23_CRC +endif + obj-$(CONFIG_W1) += wire.o wire-objs := w1.o w1_int.o w1_family.o w1_netlink.o w1_io.o @@ -13,8 +17,9 @@ obj-$(CONFIG_W1_MATROX) += matrox_w1.o obj-$(CONFIG_W1_THERM) += w1_therm.o obj-$(CONFIG_W1_SMEM) += w1_smem.o -obj-$(CONFIG_W1_DS9490) += ds9490r.o +obj-$(CONFIG_W1_DS9490) += ds9490r.o ds9490r-objs := dscore.o obj-$(CONFIG_W1_DS9490_BRIDGE) += ds_w1_bridge.o +obj-$(CONFIG_W1_DS2433) += w1_ds2433.o diff --git a/drivers/w1/ds_w1_bridge.c b/drivers/w1/ds_w1_bridge.c index 7bddd8ac7d7..a79d16d5666 100644 --- a/drivers/w1/ds_w1_bridge.c +++ b/drivers/w1/ds_w1_bridge.c @@ -1,8 +1,8 @@ /* - * ds_w1_bridge.c + * ds_w1_bridge.c * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * 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 @@ -25,7 +25,7 @@ #include "../w1/w1.h" #include "../w1/w1_int.h" #include "dscore.h" - + static struct ds_device *ds_dev; static struct w1_bus_master *ds_bus_master; @@ -120,7 +120,7 @@ static u8 ds9490r_reset(unsigned long data) static int __devinit ds_w1_init(void) { int err; - + ds_bus_master = kmalloc(sizeof(*ds_bus_master), GFP_KERNEL); if (!ds_bus_master) { printk(KERN_ERR "Failed to allocate DS9490R USB<->W1 bus_master structure.\n"); @@ -136,14 +136,14 @@ static int __devinit ds_w1_init(void) memset(ds_bus_master, 0, sizeof(*ds_bus_master)); - ds_bus_master->data = (unsigned long)ds_dev; - ds_bus_master->touch_bit = &ds9490r_touch_bit; - ds_bus_master->read_bit = &ds9490r_read_bit; - ds_bus_master->write_bit = &ds9490r_write_bit; - ds_bus_master->read_byte = &ds9490r_read_byte; - ds_bus_master->write_byte = &ds9490r_write_byte; - ds_bus_master->read_block = &ds9490r_read_block; - ds_bus_master->write_block = &ds9490r_write_block; + ds_bus_master->data = (unsigned long)ds_dev; + ds_bus_master->touch_bit = &ds9490r_touch_bit; + ds_bus_master->read_bit = &ds9490r_read_bit; + ds_bus_master->write_bit = &ds9490r_write_bit; + ds_bus_master->read_byte = &ds9490r_read_byte; + ds_bus_master->write_byte = &ds9490r_write_byte; + ds_bus_master->read_block = &ds9490r_read_block; + ds_bus_master->write_block = &ds9490r_write_block; ds_bus_master->reset_bus = &ds9490r_reset; err = w1_add_master_device(ds_bus_master); diff --git a/drivers/w1/dscore.c b/drivers/w1/dscore.c index eee6644d33d..15fb250451e 100644 --- a/drivers/w1/dscore.c +++ b/drivers/w1/dscore.c @@ -1,8 +1,8 @@ /* - * dscore.c + * dscore.c * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * 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 @@ -32,19 +32,16 @@ static struct usb_device_id ds_id_table [] = { }; MODULE_DEVICE_TABLE(usb, ds_id_table); -int ds_probe(struct usb_interface *, const struct usb_device_id *); -void ds_disconnect(struct usb_interface *); +static int ds_probe(struct usb_interface *, const struct usb_device_id *); +static void ds_disconnect(struct usb_interface *); int ds_touch_bit(struct ds_device *, u8, u8 *); int ds_read_byte(struct ds_device *, u8 *); int ds_read_bit(struct ds_device *, u8 *); int ds_write_byte(struct ds_device *, u8); int ds_write_bit(struct ds_device *, u8); -int ds_start_pulse(struct ds_device *, int); -int ds_set_speed(struct ds_device *, int); +static int ds_start_pulse(struct ds_device *, int); int ds_reset(struct ds_device *, struct ds_status *); -int ds_detect(struct ds_device *, struct ds_status *); -int ds_stop_pulse(struct ds_device *, int); struct ds_device * ds_get_device(void); void ds_put_device(struct ds_device *); @@ -79,11 +76,11 @@ void ds_put_device(struct ds_device *dev) static int ds_send_control_cmd(struct ds_device *dev, u16 value, u16 index) { int err; - - err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), + + err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), CONTROL_CMD, 0x40, value, index, NULL, 0, 1000); if (err < 0) { - printk(KERN_ERR "Failed to send command control message %x.%x: err=%d.\n", + printk(KERN_ERR "Failed to send command control message %x.%x: err=%d.\n", value, index, err); return err; } @@ -94,11 +91,11 @@ static int ds_send_control_cmd(struct ds_device *dev, u16 value, u16 index) static int ds_send_control_mode(struct ds_device *dev, u16 value, u16 index) { int err; - - err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), + + err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), MODE_CMD, 0x40, value, index, NULL, 0, 1000); if (err < 0) { - printk(KERN_ERR "Failed to send mode control message %x.%x: err=%d.\n", + printk(KERN_ERR "Failed to send mode control message %x.%x: err=%d.\n", value, index, err); return err; } @@ -109,11 +106,11 @@ static int ds_send_control_mode(struct ds_device *dev, u16 value, u16 index) static int ds_send_control(struct ds_device *dev, u16 value, u16 index) { int err; - - err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), + + err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), COMM_CMD, 0x40, value, index, NULL, 0, 1000); if (err < 0) { - printk(KERN_ERR "Failed to send control message %x.%x: err=%d.\n", + printk(KERN_ERR "Failed to send control message %x.%x: err=%d.\n", value, index, err); return err; } @@ -126,19 +123,20 @@ static inline void ds_dump_status(unsigned char *buf, unsigned char *str, int of printk("%45s: %8x\n", str, buf[off]); } -int ds_recv_status_nodump(struct ds_device *dev, struct ds_status *st, unsigned char *buf, int size) +static int ds_recv_status_nodump(struct ds_device *dev, struct ds_status *st, + unsigned char *buf, int size) { int count, err; - + memset(st, 0, sizeof(st)); - + count = 0; err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_STATUS]), buf, size, &count, 100); if (err < 0) { printk(KERN_ERR "Failed to read 1-wire data from 0x%x: err=%d.\n", dev->ep[EP_STATUS], err); return err; } - + if (count >= sizeof(*st)) memcpy(st, buf, sizeof(*st)); @@ -149,13 +147,13 @@ static int ds_recv_status(struct ds_device *dev, struct ds_status *st) { unsigned char buf[64]; int count, err = 0, i; - + memcpy(st, buf, sizeof(*st)); - + count = ds_recv_status_nodump(dev, st, buf, sizeof(buf)); if (count < 0) return err; - + printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], count); for (i=0; i<count; ++i) printk("%02x ", buf[i]); @@ -199,7 +197,7 @@ static int ds_recv_status(struct ds_device *dev, struct ds_status *st) return err; } #endif - + return err; } @@ -207,9 +205,9 @@ static int ds_recv_data(struct ds_device *dev, unsigned char *buf, int size) { int count, err; struct ds_status st; - + count = 0; - err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]), + err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]), buf, size, &count, 1000); if (err < 0) { printk(KERN_INFO "Clearing ep0x%x.\n", dev->ep[EP_DATA_IN]); @@ -234,7 +232,7 @@ static int ds_recv_data(struct ds_device *dev, unsigned char *buf, int size) static int ds_send_data(struct ds_device *dev, unsigned char *buf, int len) { int count, err; - + count = 0; err = usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, dev->ep[EP_DATA_OUT]), buf, len, &count, 1000); if (err < 0) { @@ -245,12 +243,14 @@ static int ds_send_data(struct ds_device *dev, unsigned char *buf, int len) return err; } +#if 0 + int ds_stop_pulse(struct ds_device *dev, int limit) { struct ds_status st; int count = 0, err = 0; u8 buf[0x20]; - + do { err = ds_send_control(dev, CTL_HALT_EXE_IDLE, 0); if (err) @@ -275,7 +275,7 @@ int ds_stop_pulse(struct ds_device *dev, int limit) int ds_detect(struct ds_device *dev, struct ds_status *st) { int err; - + err = ds_send_control_cmd(dev, CTL_RESET_DEVICE, 0); if (err) return err; @@ -283,11 +283,11 @@ int ds_detect(struct ds_device *dev, struct ds_status *st) err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, 0); if (err) return err; - + err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM | COMM_TYPE, 0x40); if (err) return err; - + err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_PROG); if (err) return err; @@ -297,7 +297,9 @@ int ds_detect(struct ds_device *dev, struct ds_status *st) return err; } -int ds_wait_status(struct ds_device *dev, struct ds_status *st) +#endif /* 0 */ + +static int ds_wait_status(struct ds_device *dev, struct ds_status *st) { u8 buf[0x20]; int err, count = 0; @@ -305,7 +307,7 @@ int ds_wait_status(struct ds_device *dev, struct ds_status *st) do { err = ds_recv_status_nodump(dev, st, buf, sizeof(buf)); #if 0 - if (err >= 0) { + if (err >= 0) { int i; printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], err); for (i=0; i<err; ++i) @@ -319,10 +321,8 @@ int ds_wait_status(struct ds_device *dev, struct ds_status *st) if (((err > 16) && (buf[0x10] & 0x01)) || count >= 100 || err < 0) { ds_recv_status(dev, st); return -1; - } - else { + } else return 0; - } } int ds_reset(struct ds_device *dev, struct ds_status *st) @@ -345,6 +345,7 @@ int ds_reset(struct ds_device *dev, struct ds_status *st) return 0; } +#if 0 int ds_set_speed(struct ds_device *dev, int speed) { int err; @@ -356,20 +357,21 @@ int ds_set_speed(struct ds_device *dev, int speed) speed = SPEED_FLEXIBLE; speed &= 0xff; - + err = ds_send_control_mode(dev, MOD_1WIRE_SPEED, speed); if (err) return err; return err; } +#endif /* 0 */ -int ds_start_pulse(struct ds_device *dev, int delay) +static int ds_start_pulse(struct ds_device *dev, int delay) { int err; u8 del = 1 + (u8)(delay >> 4); struct ds_status st; - + #if 0 err = ds_stop_pulse(dev, 10); if (err) @@ -390,7 +392,7 @@ int ds_start_pulse(struct ds_device *dev, int delay) mdelay(delay); ds_wait_status(dev, &st); - + return err; } @@ -400,7 +402,7 @@ int ds_touch_bit(struct ds_device *dev, u8 bit, u8 *tbit) struct ds_status st; u16 value = (COMM_BIT_IO | COMM_IM) | ((bit) ? COMM_D : 0); u16 cmd; - + err = ds_send_control(dev, value, 0); if (err) return err; @@ -430,7 +432,7 @@ int ds_write_bit(struct ds_device *dev, u8 bit) { int err; struct ds_status st; - + err = ds_send_control(dev, COMM_BIT_IO | COMM_IM | (bit) ? COMM_D : 0, 0); if (err) return err; @@ -445,7 +447,7 @@ int ds_write_byte(struct ds_device *dev, u8 byte) int err; struct ds_status st; u8 rbyte; - + err = ds_send_control(dev, COMM_BYTE_IO | COMM_IM | COMM_SPU, byte); if (err) return err; @@ -453,11 +455,11 @@ int ds_write_byte(struct ds_device *dev, u8 byte) err = ds_wait_status(dev, &st); if (err) return err; - + err = ds_recv_data(dev, &rbyte, sizeof(rbyte)); if (err < 0) return err; - + ds_start_pulse(dev, PULLUP_PULSE_DURATION); return !(byte == rbyte); @@ -470,11 +472,11 @@ int ds_read_bit(struct ds_device *dev, u8 *bit) err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_SPUE); if (err) return err; - + err = ds_send_control(dev, COMM_BIT_IO | COMM_IM | COMM_SPU | COMM_D, 0); if (err) return err; - + err = ds_recv_data(dev, bit, sizeof(*bit)); if (err < 0) return err; @@ -492,7 +494,7 @@ int ds_read_byte(struct ds_device *dev, u8 *byte) return err; ds_wait_status(dev, &st); - + err = ds_recv_data(dev, byte, sizeof(*byte)); if (err < 0) return err; @@ -509,17 +511,17 @@ int ds_read_block(struct ds_device *dev, u8 *buf, int len) return -E2BIG; memset(buf, 0xFF, len); - + err = ds_send_data(dev, buf, len); if (err < 0) return err; - + err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | COMM_SPU, len); if (err) return err; ds_wait_status(dev, &st); - + memset(buf, 0x00, len); err = ds_recv_data(dev, buf, len); @@ -530,11 +532,11 @@ int ds_write_block(struct ds_device *dev, u8 *buf, int len) { int err; struct ds_status st; - + err = ds_send_data(dev, buf, len); if (err < 0) return err; - + ds_wait_status(dev, &st); err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | COMM_SPU, len); @@ -548,10 +550,12 @@ int ds_write_block(struct ds_device *dev, u8 *buf, int len) return err; ds_start_pulse(dev, PULLUP_PULSE_DURATION); - + return !(err == len); } +#if 0 + int ds_search(struct ds_device *dev, u64 init, u64 *buf, u8 id_number, int conditional_search) { int err; @@ -559,11 +563,11 @@ int ds_search(struct ds_device *dev, u64 init, u64 *buf, u8 id_number, int condi struct ds_status st; memset(buf, 0, sizeof(buf)); - + err = ds_send_data(ds_dev, (unsigned char *)&init, 8); if (err) return err; - + ds_wait_status(ds_dev, &st); value = COMM_SEARCH_ACCESS | COMM_IM | COMM_SM | COMM_F | COMM_RTS; @@ -589,7 +593,7 @@ int ds_match_access(struct ds_device *dev, u64 init) err = ds_send_data(dev, (unsigned char *)&init, sizeof(init)); if (err) return err; - + ds_wait_status(dev, &st); err = ds_send_control(dev, COMM_MATCH_ACCESS | COMM_IM | COMM_RST, 0x0055); @@ -609,11 +613,11 @@ int ds_set_path(struct ds_device *dev, u64 init) memcpy(buf, &init, 8); buf[8] = BRANCH_MAIN; - + err = ds_send_data(dev, buf, sizeof(buf)); if (err) return err; - + ds_wait_status(dev, &st); err = ds_send_control(dev, COMM_SET_PATH | COMM_IM | COMM_RST, 0); @@ -625,7 +629,10 @@ int ds_set_path(struct ds_device *dev, u64 init) return 0; } -int ds_probe(struct usb_interface *intf, const struct usb_device_id *udev_id) +#endif /* 0 */ + +static int ds_probe(struct usb_interface *intf, + const struct usb_device_id *udev_id) { struct usb_device *udev = interface_to_usbdev(intf); struct usb_endpoint_descriptor *endpoint; @@ -653,7 +660,7 @@ int ds_probe(struct usb_interface *intf, const struct usb_device_id *udev_id) printk(KERN_ERR "Failed to reset configuration: err=%d.\n", err); return err; } - + iface_desc = &intf->altsetting[0]; if (iface_desc->desc.bNumEndpoints != NUM_EP-1) { printk(KERN_INFO "Num endpoints=%d. It is not DS9490R.\n", iface_desc->desc.bNumEndpoints); @@ -662,37 +669,37 @@ int ds_probe(struct usb_interface *intf, const struct usb_device_id *udev_id) atomic_set(&ds_dev->refcnt, 0); memset(ds_dev->ep, 0, sizeof(ds_dev->ep)); - + /* - * This loop doesn'd show control 0 endpoint, + * This loop doesn'd show control 0 endpoint, * so we will fill only 1-3 endpoints entry. */ for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { endpoint = &iface_desc->endpoint[i].desc; ds_dev->ep[i+1] = endpoint->bEndpointAddress; - + printk("%d: addr=%x, size=%d, dir=%s, type=%x\n", i, endpoint->bEndpointAddress, le16_to_cpu(endpoint->wMaxPacketSize), (endpoint->bEndpointAddress & USB_DIR_IN)?"IN":"OUT", endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); } - + #if 0 { int err, i; u64 buf[3]; u64 init=0xb30000002078ee81ull; struct ds_status st; - + ds_reset(ds_dev, &st); err = ds_search(ds_dev, init, buf, 3, 0); if (err < 0) return err; for (i=0; i<err; ++i) printk("%d: %llx\n", i, buf[i]); - - printk("Resetting...\n"); + + printk("Resetting...\n"); ds_reset(ds_dev, &st); printk("Setting path for %llx.\n", init); err = ds_set_path(ds_dev, init); @@ -707,12 +714,12 @@ int ds_probe(struct usb_interface *intf, const struct usb_device_id *udev_id) err = ds_search(ds_dev, init, buf, 3, 0); printk("ds_search() returned %d\n", err); - + if (err < 0) return err; for (i=0; i<err; ++i) printk("%d: %llx\n", i, buf[i]); - + return 0; } #endif @@ -720,10 +727,10 @@ int ds_probe(struct usb_interface *intf, const struct usb_device_id *udev_id) return 0; } -void ds_disconnect(struct usb_interface *intf) +static void ds_disconnect(struct usb_interface *intf) { struct ds_device *dev; - + dev = usb_get_intfdata(intf); usb_set_intfdata(intf, NULL); @@ -740,7 +747,7 @@ void ds_disconnect(struct usb_interface *intf) ds_dev = NULL; } -int ds_init(void) +static int ds_init(void) { int err; @@ -753,7 +760,7 @@ int ds_init(void) return 0; } -void ds_fini(void) +static void ds_fini(void) { usb_deregister(&ds_driver); } @@ -776,8 +783,8 @@ EXPORT_SYMBOL(ds_get_device); EXPORT_SYMBOL(ds_put_device); /* - * This functions can be used for EEPROM programming, - * when driver will be included into mainline this will + * This functions can be used for EEPROM programming, + * when driver will be included into mainline this will * require uncommenting. */ #if 0 diff --git a/drivers/w1/dscore.h b/drivers/w1/dscore.h index 9c767ef4ac2..6cf5671d6eb 100644 --- a/drivers/w1/dscore.h +++ b/drivers/w1/dscore.h @@ -1,8 +1,8 @@ /* - * dscore.h + * dscore.h * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * 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 @@ -122,7 +122,7 @@ struct ds_device { - struct usb_device *udev; + struct usb_device *udev; struct usb_interface *intf; int ep[NUM_EP]; @@ -156,11 +156,7 @@ int ds_read_byte(struct ds_device *, u8 *); int ds_read_bit(struct ds_device *, u8 *); int ds_write_byte(struct ds_device *, u8); int ds_write_bit(struct ds_device *, u8); -int ds_start_pulse(struct ds_device *, int); -int ds_set_speed(struct ds_device *, int); int ds_reset(struct ds_device *, struct ds_status *); -int ds_detect(struct ds_device *, struct ds_status *); -int ds_stop_pulse(struct ds_device *, int); struct ds_device * ds_get_device(void); void ds_put_device(struct ds_device *); int ds_write_block(struct ds_device *, u8 *, int); diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index 0bbf029b1ef..1b6b74c116a 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -45,10 +45,12 @@ MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>"); MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol."); static int w1_timeout = 10; +static int w1_control_timeout = 1; int w1_max_slave_count = 10; int w1_max_slave_ttl = 10; module_param_named(timeout, w1_timeout, int, 0); +module_param_named(control_timeout, w1_control_timeout, int, 0); module_param_named(max_slave_count, w1_max_slave_count, int, 0); module_param_named(slave_ttl, w1_max_slave_ttl, int, 0); @@ -59,19 +61,6 @@ static pid_t control_thread; static int control_needs_exit; static DECLARE_COMPLETION(w1_control_complete); -/* stuff for the default family */ -static ssize_t w1_famdefault_read_name(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct w1_slave *sl = container_of(dev, struct w1_slave, dev); - return(sprintf(buf, "%s\n", sl->name)); -} -static struct w1_family_ops w1_default_fops = { - .rname = &w1_famdefault_read_name, -}; -static struct w1_family w1_default_family = { - .fops = &w1_default_fops, -}; - static int w1_master_match(struct device *dev, struct device_driver *drv) { return 1; @@ -82,73 +71,116 @@ static int w1_master_probe(struct device *dev) return -ENODEV; } -static int w1_master_remove(struct device *dev) -{ - return 0; -} - static void w1_master_release(struct device *dev) { - struct w1_master *md = container_of(dev, struct w1_master, dev); + struct w1_master *md = dev_to_w1_master(dev); - complete(&md->dev_released); + dev_dbg(dev, "%s: Releasing %s.\n", __func__, md->name); + + if (md->nls && md->nls->sk_socket) + sock_release(md->nls->sk_socket); + memset(md, 0, sizeof(struct w1_master) + sizeof(struct w1_bus_master)); + kfree(md); } static void w1_slave_release(struct device *dev) { - struct w1_slave *sl = container_of(dev, struct w1_slave, dev); + struct w1_slave *sl = dev_to_w1_slave(dev); + + dev_dbg(dev, "%s: Releasing %s.\n", __func__, sl->name); + + while (atomic_read(&sl->refcnt)) { + dev_dbg(dev, "Waiting for %s to become free: refcnt=%d.\n", + sl->name, atomic_read(&sl->refcnt)); + if (msleep_interruptible(1000)) + flush_signals(current); + } + + w1_family_put(sl->family); + sl->master->slave_count--; - complete(&sl->dev_released); + complete(&sl->released); } -static ssize_t w1_default_read_name(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t w1_slave_read_name(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "No family registered.\n"); + struct w1_slave *sl = dev_to_w1_slave(dev); + + return sprintf(buf, "%s\n", sl->name); } -static ssize_t w1_default_read_bin(struct kobject *kobj, char *buf, loff_t off, - size_t count) +static ssize_t w1_slave_read_id(struct kobject *kobj, char *buf, loff_t off, size_t count) { - return sprintf(buf, "No family registered.\n"); + struct w1_slave *sl = kobj_to_w1_slave(kobj); + + atomic_inc(&sl->refcnt); + if (off > 8) { + count = 0; + } else { + if (off + count > 8) + count = 8 - off; + + memcpy(buf, (u8 *)&sl->reg_num, count); + } + atomic_dec(&sl->refcnt); + + return count; } -static struct device_attribute w1_slave_attribute = - __ATTR(name, S_IRUGO, w1_default_read_name, NULL); - -static struct bin_attribute w1_slave_bin_attribute = { - .attr = { - .name = "w1_slave", - .mode = S_IRUGO, - .owner = THIS_MODULE, - }, - .size = W1_SLAVE_DATA_SIZE, - .read = &w1_default_read_bin, +static struct device_attribute w1_slave_attr_name = + __ATTR(name, S_IRUGO, w1_slave_read_name, NULL); + +static struct bin_attribute w1_slave_attr_bin_id = { + .attr = { + .name = "id", + .mode = S_IRUGO, + .owner = THIS_MODULE, + }, + .size = 8, + .read = w1_slave_read_id, }; +/* Default family */ +static struct w1_family w1_default_family; + +static int w1_hotplug(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size); static struct bus_type w1_bus_type = { .name = "w1", .match = w1_master_match, + .hotplug = w1_hotplug, }; -struct device_driver w1_driver = { - .name = "w1_driver", +struct device_driver w1_master_driver = { + .name = "w1_master_driver", .bus = &w1_bus_type, .probe = w1_master_probe, - .remove = w1_master_remove, }; -struct device w1_device = { +struct device w1_master_device = { .parent = NULL, .bus = &w1_bus_type, .bus_id = "w1 bus master", - .driver = &w1_driver, + .driver = &w1_master_driver, .release = &w1_master_release }; +struct device_driver w1_slave_driver = { + .name = "w1_slave_driver", + .bus = &w1_bus_type, +}; + +struct device w1_slave_device = { + .parent = NULL, + .bus = &w1_bus_type, + .bus_id = "w1 bus slave", + .driver = &w1_slave_driver, + .release = &w1_slave_release +}; + static ssize_t w1_master_attribute_show_name(struct device *dev, struct device_attribute *attr, char *buf) { - struct w1_master *md = container_of(dev, struct w1_master, dev); + struct w1_master *md = dev_to_w1_master(dev); ssize_t count; if (down_interruptible (&md->mutex)) @@ -165,7 +197,7 @@ static ssize_t w1_master_attribute_store_search(struct device * dev, struct device_attribute *attr, const char * buf, size_t count) { - struct w1_master *md = container_of(dev, struct w1_master, dev); + struct w1_master *md = dev_to_w1_master(dev); if (down_interruptible (&md->mutex)) return -EBUSY; @@ -181,7 +213,7 @@ static ssize_t w1_master_attribute_show_search(struct device *dev, struct device_attribute *attr, char *buf) { - struct w1_master *md = container_of(dev, struct w1_master, dev); + struct w1_master *md = dev_to_w1_master(dev); ssize_t count; if (down_interruptible (&md->mutex)) @@ -196,7 +228,7 @@ static ssize_t w1_master_attribute_show_search(struct device *dev, static ssize_t w1_master_attribute_show_pointer(struct device *dev, struct device_attribute *attr, char *buf) { - struct w1_master *md = container_of(dev, struct w1_master, dev); + struct w1_master *md = dev_to_w1_master(dev); ssize_t count; if (down_interruptible(&md->mutex)) @@ -217,7 +249,7 @@ static ssize_t w1_master_attribute_show_timeout(struct device *dev, struct devic static ssize_t w1_master_attribute_show_max_slave_count(struct device *dev, struct device_attribute *attr, char *buf) { - struct w1_master *md = container_of(dev, struct w1_master, dev); + struct w1_master *md = dev_to_w1_master(dev); ssize_t count; if (down_interruptible(&md->mutex)) @@ -231,7 +263,7 @@ static ssize_t w1_master_attribute_show_max_slave_count(struct device *dev, stru static ssize_t w1_master_attribute_show_attempts(struct device *dev, struct device_attribute *attr, char *buf) { - struct w1_master *md = container_of(dev, struct w1_master, dev); + struct w1_master *md = dev_to_w1_master(dev); ssize_t count; if (down_interruptible(&md->mutex)) @@ -245,7 +277,7 @@ static ssize_t w1_master_attribute_show_attempts(struct device *dev, struct devi static ssize_t w1_master_attribute_show_slave_count(struct device *dev, struct device_attribute *attr, char *buf) { - struct w1_master *md = container_of(dev, struct w1_master, dev); + struct w1_master *md = dev_to_w1_master(dev); ssize_t count; if (down_interruptible(&md->mutex)) @@ -259,7 +291,7 @@ static ssize_t w1_master_attribute_show_slave_count(struct device *dev, struct d static ssize_t w1_master_attribute_show_slaves(struct device *dev, struct device_attribute *attr, char *buf) { - struct w1_master *md = container_of(dev, struct w1_master, dev); + struct w1_master *md = dev_to_w1_master(dev); int c = PAGE_SIZE; if (down_interruptible(&md->mutex)) @@ -329,12 +361,55 @@ void w1_destroy_master_attributes(struct w1_master *master) sysfs_remove_group(&master->dev.kobj, &w1_master_defattr_group); } +#ifdef CONFIG_HOTPLUG +static int w1_hotplug(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size) +{ + struct w1_master *md = NULL; + struct w1_slave *sl = NULL; + char *event_owner, *name; + int err, cur_index=0, cur_len=0; + + if (dev->driver == &w1_master_driver) { + md = container_of(dev, struct w1_master, dev); + event_owner = "master"; + name = md->name; + } else if (dev->driver == &w1_slave_driver) { + sl = container_of(dev, struct w1_slave, dev); + event_owner = "slave"; + name = sl->name; + } else { + dev_dbg(dev, "Unknown hotplug event.\n"); + return -EINVAL; + } + + dev_dbg(dev, "Hotplug event for %s %s, bus_id=%s.\n", event_owner, name, dev->bus_id); + + if (dev->driver != &w1_slave_driver || !sl) + return 0; + + err = add_hotplug_env_var(envp, num_envp, &cur_index, buffer, buffer_size, &cur_len, "W1_FID=%02X", sl->reg_num.family); + if (err) + return err; + + err = add_hotplug_env_var(envp, num_envp, &cur_index, buffer, buffer_size, &cur_len, "W1_SLAVE_ID=%024LX", (u64)sl->reg_num.id); + if (err) + return err; + + return 0; +}; +#else +static int w1_hotplug(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size) +{ + return 0; +} +#endif + static int __w1_attach_slave_device(struct w1_slave *sl) { int err; sl->dev.parent = &sl->master->dev; - sl->dev.driver = sl->master->driver; + sl->dev.driver = &w1_slave_driver; sl->dev.bus = &w1_bus_type; sl->dev.release = &w1_slave_release; @@ -347,8 +422,7 @@ static int __w1_attach_slave_device(struct w1_slave *sl) (unsigned int) sl->reg_num.family, (unsigned long long) sl->reg_num.id); - dev_dbg(&sl->dev, "%s: registering %s.\n", __func__, - &sl->dev.bus_id[0]); + dev_dbg(&sl->dev, "%s: registering %s as %p.\n", __func__, &sl->dev.bus_id[0]); |