From e84665c9cb4db963393fafad6fefe5efdd7e4a09 Mon Sep 17 00:00:00 2001 From: Lennert Buytenhek Date: Fri, 20 Mar 2009 09:52:09 +0000 Subject: dsa: add switch chip cascading support The initial version of the DSA driver only supported a single switch chip per network interface, while DSA-capable switch chips can be interconnected to form a tree of switch chips. This patch adds support for multiple switch chips on a network interface. An example topology for a 16-port device with an embedded CPU is as follows: +-----+ +--------+ +--------+ | |eth0 10| switch |9 10| switch | | CPU +----------+ +-------+ | | | | chip 0 | | chip 1 | +-----+ +---++---+ +---++---+ || || || || ||1000baseT ||1000baseT ||ports 1-8 ||ports 9-16 This requires a couple of interdependent changes in the DSA layer: - The dsa platform driver data needs to be extended: there is still only one netdevice per DSA driver instance (eth0 in the example above), but each of the switch chips in the tree needs its own mii_bus device pointer, MII management bus address, and port name array. (include/net/dsa.h) The existing in-tree dsa users need some small changes to deal with this. (arch/arm) - The DSA and Ethertype DSA tagging modules need to be extended to use the DSA device ID field on receive and demultiplex the packet accordingly, and fill in the DSA device ID field on transmit according to which switch chip the packet is heading to. (net/dsa/tag_{dsa,edsa}.c) - The concept of "CPU port", which is the switch chip port that the CPU is connected to (port 10 on switch chip 0 in the example), needs to be extended with the concept of "upstream port", which is the port on the switch chip that will bring us one hop closer to the CPU (port 10 for both switch chips in the example above). - The dsa platform data needs to specify which ports on which switch chips are links to other switch chips, so that we can enable DSA tagging mode on them. (For inter-switch links, we always use non-EtherType DSA tagging, since it has lower overhead. The CPU link uses dsa or edsa tagging depending on what the 'root' switch chip supports.) This is done by specifying "dsa" for the given port in the port array. - The dsa platform data needs to be extended with information on via which port to reach any given switch chip from any given switch chip. This info is specified via the per-switch chip data struct ->rtable[] array, which gives the nexthop ports for each of the other switches in the tree. For the example topology above, the dsa platform data would look something like this: static struct dsa_chip_data sw[2] = { { .mii_bus = &foo, .sw_addr = 1, .port_names[0] = "p1", .port_names[1] = "p2", .port_names[2] = "p3", .port_names[3] = "p4", .port_names[4] = "p5", .port_names[5] = "p6", .port_names[6] = "p7", .port_names[7] = "p8", .port_names[9] = "dsa", .port_names[10] = "cpu", .rtable = (s8 []){ -1, 9, }, }, { .mii_bus = &foo, .sw_addr = 2, .port_names[0] = "p9", .port_names[1] = "p10", .port_names[2] = "p11", .port_names[3] = "p12", .port_names[4] = "p13", .port_names[5] = "p14", .port_names[6] = "p15", .port_names[7] = "p16", .port_names[10] = "dsa", .rtable = (s8 []){ 10, -1, }, }, }, static struct dsa_platform_data pd = { .netdev = &foo, .nr_switches = 2, .sw = sw, }; Signed-off-by: Lennert Buytenhek Tested-by: Gary Thomas Signed-off-by: David S. Miller --- arch/arm/mach-orion5x/common.c | 5 ++++- arch/arm/mach-orion5x/rd88f5181l-fxo-setup.c | 9 +++++++-- arch/arm/mach-orion5x/rd88f5181l-ge-setup.c | 10 ++++++++-- arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c | 10 ++++++++-- arch/arm/mach-orion5x/wrt350n-v2-setup.c | 9 +++++++-- 5 files changed, 34 insertions(+), 9 deletions(-) (limited to 'arch/arm/mach-orion5x') diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c index 0a623379789f..a4ecf625981e 100644 --- a/arch/arm/mach-orion5x/common.c +++ b/arch/arm/mach-orion5x/common.c @@ -219,14 +219,17 @@ static struct platform_device orion5x_switch_device = { void __init orion5x_eth_switch_init(struct dsa_platform_data *d, int irq) { + int i; + if (irq != NO_IRQ) { orion5x_switch_resources[0].start = irq; orion5x_switch_resources[0].end = irq; orion5x_switch_device.num_resources = 1; } - d->mii_bus = &orion5x_eth_shared.dev; d->netdev = &orion5x_eth.dev; + for (i = 0; i < d->nr_chips; i++) + d->chip[i].mii_bus = &orion5x_eth_shared.dev; orion5x_switch_device.dev.platform_data = d; platform_device_register(&orion5x_switch_device); diff --git a/arch/arm/mach-orion5x/rd88f5181l-fxo-setup.c b/arch/arm/mach-orion5x/rd88f5181l-fxo-setup.c index 15f53235ee30..9c1ca41730ba 100644 --- a/arch/arm/mach-orion5x/rd88f5181l-fxo-setup.c +++ b/arch/arm/mach-orion5x/rd88f5181l-fxo-setup.c @@ -94,7 +94,7 @@ static struct mv643xx_eth_platform_data rd88f5181l_fxo_eth_data = { .duplex = DUPLEX_FULL, }; -static struct dsa_platform_data rd88f5181l_fxo_switch_data = { +static struct dsa_chip_data rd88f5181l_fxo_switch_chip_data = { .port_names[0] = "lan2", .port_names[1] = "lan1", .port_names[2] = "wan", @@ -103,6 +103,11 @@ static struct dsa_platform_data rd88f5181l_fxo_switch_data = { .port_names[7] = "lan3", }; +static struct dsa_platform_data rd88f5181l_fxo_switch_plat_data = { + .nr_chips = 1, + .chip = &rd88f5181l_fxo_switch_chip_data, +}; + static void __init rd88f5181l_fxo_init(void) { /* @@ -117,7 +122,7 @@ static void __init rd88f5181l_fxo_init(void) */ orion5x_ehci0_init(); orion5x_eth_init(&rd88f5181l_fxo_eth_data); - orion5x_eth_switch_init(&rd88f5181l_fxo_switch_data, NO_IRQ); + orion5x_eth_switch_init(&rd88f5181l_fxo_switch_plat_data, NO_IRQ); orion5x_uart0_init(); orion5x_setup_dev_boot_win(RD88F5181L_FXO_NOR_BOOT_BASE, diff --git a/arch/arm/mach-orion5x/rd88f5181l-ge-setup.c b/arch/arm/mach-orion5x/rd88f5181l-ge-setup.c index 8ad3934399d4..ee1399ff0ced 100644 --- a/arch/arm/mach-orion5x/rd88f5181l-ge-setup.c +++ b/arch/arm/mach-orion5x/rd88f5181l-ge-setup.c @@ -95,7 +95,7 @@ static struct mv643xx_eth_platform_data rd88f5181l_ge_eth_data = { .duplex = DUPLEX_FULL, }; -static struct dsa_platform_data rd88f5181l_ge_switch_data = { +static struct dsa_chip_data rd88f5181l_ge_switch_chip_data = { .port_names[0] = "lan2", .port_names[1] = "lan1", .port_names[2] = "wan", @@ -104,6 +104,11 @@ static struct dsa_platform_data rd88f5181l_ge_switch_data = { .port_names[7] = "lan3", }; +static struct dsa_platform_data rd88f5181l_ge_switch_plat_data = { + .nr_chips = 1, + .chip = &rd88f5181l_ge_switch_chip_data, +}; + static struct i2c_board_info __initdata rd88f5181l_ge_i2c_rtc = { I2C_BOARD_INFO("ds1338", 0x68), }; @@ -122,7 +127,8 @@ static void __init rd88f5181l_ge_init(void) */ orion5x_ehci0_init(); orion5x_eth_init(&rd88f5181l_ge_eth_data); - orion5x_eth_switch_init(&rd88f5181l_ge_switch_data, gpio_to_irq(8)); + orion5x_eth_switch_init(&rd88f5181l_ge_switch_plat_data, + gpio_to_irq(8)); orion5x_i2c_init(); orion5x_uart0_init(); diff --git a/arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c b/arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c index 262e25e4dace..7737cf9a8f50 100644 --- a/arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c +++ b/arch/arm/mach-orion5x/rd88f6183ap-ge-setup.c @@ -35,7 +35,7 @@ static struct mv643xx_eth_platform_data rd88f6183ap_ge_eth_data = { .duplex = DUPLEX_FULL, }; -static struct dsa_platform_data rd88f6183ap_ge_switch_data = { +static struct dsa_chip_data rd88f6183ap_ge_switch_chip_data = { .port_names[0] = "lan1", .port_names[1] = "lan2", .port_names[2] = "lan3", @@ -44,6 +44,11 @@ static struct dsa_platform_data rd88f6183ap_ge_switch_data = { .port_names[5] = "cpu", }; +static struct dsa_platform_data rd88f6183ap_ge_switch_plat_data = { + .nr_chips = 1, + .chip = &rd88f6183ap_ge_switch_chip_data, +}; + static struct mtd_partition rd88f6183ap_ge_partitions[] = { { .name = "kernel", @@ -89,7 +94,8 @@ static void __init rd88f6183ap_ge_init(void) */ orion5x_ehci0_init(); orion5x_eth_init(&rd88f6183ap_ge_eth_data); - orion5x_eth_switch_init(&rd88f6183ap_ge_switch_data, gpio_to_irq(3)); + orion5x_eth_switch_init(&rd88f6183ap_ge_switch_plat_data, + gpio_to_irq(3)); spi_register_board_info(rd88f6183ap_ge_spi_slave_info, ARRAY_SIZE(rd88f6183ap_ge_spi_slave_info)); orion5x_spi_init(); diff --git a/arch/arm/mach-orion5x/wrt350n-v2-setup.c b/arch/arm/mach-orion5x/wrt350n-v2-setup.c index cc8f89200865..1b4ad9d5e2eb 100644 --- a/arch/arm/mach-orion5x/wrt350n-v2-setup.c +++ b/arch/arm/mach-orion5x/wrt350n-v2-setup.c @@ -106,7 +106,7 @@ static struct mv643xx_eth_platform_data wrt350n_v2_eth_data = { .duplex = DUPLEX_FULL, }; -static struct dsa_platform_data wrt350n_v2_switch_data = { +static struct dsa_chip_data wrt350n_v2_switch_chip_data = { .port_names[0] = "lan2", .port_names[1] = "lan1", .port_names[2] = "wan", @@ -115,6 +115,11 @@ static struct dsa_platform_data wrt350n_v2_switch_data = { .port_names[7] = "lan4", }; +static struct dsa_platform_data wrt350n_v2_switch_plat_data = { + .nr_chips = 1, + .chip = &wrt350n_v2_switch_chip_data, +}; + static void __init wrt350n_v2_init(void) { /* @@ -129,7 +134,7 @@ static void __init wrt350n_v2_init(void) */ orion5x_ehci0_init(); orion5x_eth_init(&wrt350n_v2_eth_data); - orion5x_eth_switch_init(&wrt350n_v2_switch_data, NO_IRQ); + orion5x_eth_switch_init(&wrt350n_v2_switch_plat_data, NO_IRQ); orion5x_uart0_init(); orion5x_setup_dev_boot_win(WRT350N_V2_NOR_BOOT_BASE, -- cgit v1.2.3 From 9e058d4f57751daa008b764735f97fdfccfeab6c Mon Sep 17 00:00:00 2001 From: Thomas Reitmayr Date: Tue, 24 Feb 2009 14:59:22 -0800 Subject: [WATCHDOG] orion5x_wdt: fix compile issue by providing tclk as platform data The orion5x-wdt driver is now registered as a platform device and receives the tclk value as platform data. This fixes a compile issue cause by a previously removed define "ORION5X_TCLK". Signed-off-by: Thomas Reitmayr Acked-by: Nicolas Pitre Signed-off-by: Kristof Provost Cc: Lennert Buytenhek Cc: Wim Van Sebroeck Cc: Russell King Cc: Martin Michlmayr Cc: Sylver Bruneau Cc: Kunihiko IMAI Signed-off-by: Andrew Morton --- arch/arm/mach-orion5x/common.c | 29 ++++++++++ arch/arm/plat-orion/include/plat/orion5x_wdt.h | 18 ++++++ drivers/watchdog/orion5x_wdt.c | 76 +++++++++++++++++++++----- 3 files changed, 109 insertions(+), 14 deletions(-) create mode 100644 arch/arm/plat-orion/include/plat/orion5x_wdt.h (limited to 'arch/arm/mach-orion5x') diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c index 8a0e49d84256..1a1df24f419e 100644 --- a/arch/arm/mach-orion5x/common.c +++ b/arch/arm/mach-orion5x/common.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include "common.h" @@ -532,6 +533,29 @@ void __init orion5x_xor_init(void) } +/***************************************************************************** + * Watchdog + ****************************************************************************/ +static struct orion5x_wdt_platform_data orion5x_wdt_data = { + .tclk = 0, +}; + +static struct platform_device orion5x_wdt_device = { + .name = "orion5x_wdt", + .id = -1, + .dev = { + .platform_data = &orion5x_wdt_data, + }, + .num_resources = 0, +}; + +void __init orion5x_wdt_init(void) +{ + orion5x_wdt_data.tclk = orion5x_tclk; + platform_device_register(&orion5x_wdt_device); +} + + /***************************************************************************** * Time handling ****************************************************************************/ @@ -631,6 +655,11 @@ void __init orion5x_init(void) printk(KERN_INFO "Orion: Applying 5281 D0 WFI workaround.\n"); disable_hlt(); } + + /* + * Register watchdog driver + */ + orion5x_wdt_init(); } /* diff --git a/arch/arm/plat-orion/include/plat/orion5x_wdt.h b/arch/arm/plat-orion/include/plat/orion5x_wdt.h new file mode 100644 index 000000000000..3c9cf6a305ef --- /dev/null +++ b/arch/arm/plat-orion/include/plat/orion5x_wdt.h @@ -0,0 +1,18 @@ +/* + * arch/arm/plat-orion/include/plat/orion5x_wdt.h + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef __PLAT_ORION5X_WDT_H +#define __PLAT_ORION5X_WDT_H + +struct orion5x_wdt_platform_data { + u32 tclk; /* no support yet */ +}; + + +#endif + diff --git a/drivers/watchdog/orion5x_wdt.c b/drivers/watchdog/orion5x_wdt.c index b64ae1a17832..e81441f103dd 100644 --- a/drivers/watchdog/orion5x_wdt.c +++ b/drivers/watchdog/orion5x_wdt.c @@ -16,11 +16,13 @@ #include #include #include +#include #include #include #include #include #include +#include /* * Watchdog timer block registers. @@ -29,13 +31,14 @@ #define WDT_EN 0x0010 #define WDT_VAL (TIMER_VIRT_BASE + 0x0024) -#define ORION5X_TCLK 166666667 -#define WDT_MAX_DURATION (0xffffffff / ORION5X_TCLK) +#define WDT_MAX_CYCLE_COUNT 0xffffffff #define WDT_IN_USE 0 #define WDT_OK_TO_CLOSE 1 static int nowayout = WATCHDOG_NOWAYOUT; -static int heartbeat = WDT_MAX_DURATION; /* (seconds) */ +static int heartbeat = -1; /* module parameter (seconds) */ +static unsigned int wdt_max_duration; /* (seconds) */ +static unsigned int wdt_tclk; static unsigned long wdt_status; static spinlock_t wdt_lock; @@ -46,7 +49,7 @@ static void wdt_enable(void) spin_lock(&wdt_lock); /* Set watchdog duration */ - writel(ORION5X_TCLK * heartbeat, WDT_VAL); + writel(wdt_tclk * heartbeat, WDT_VAL); /* Clear watchdog timer interrupt */ reg = readl(BRIDGE_CAUSE); @@ -88,7 +91,7 @@ static void wdt_disable(void) static int orion5x_wdt_get_timeleft(int *time_left) { spin_lock(&wdt_lock); - *time_left = readl(WDT_VAL) / ORION5X_TCLK; + *time_left = readl(WDT_VAL) / wdt_tclk; spin_unlock(&wdt_lock); return 0; } @@ -158,7 +161,7 @@ static long orion5x_wdt_ioctl(struct file *file, unsigned int cmd, if (ret) break; - if (time <= 0 || time > WDT_MAX_DURATION) { + if (time <= 0 || time > wdt_max_duration) { ret = -EINVAL; break; } @@ -210,23 +213,69 @@ static struct miscdevice orion5x_wdt_miscdev = { .fops = &orion5x_wdt_fops, }; -static int __init orion5x_wdt_init(void) +static int __devinit orion5x_wdt_probe(struct platform_device *pdev) { + struct orion5x_wdt_platform_data *pdata = pdev->dev.platform_data; int ret; - spin_lock_init(&wdt_lock); + if (pdata) { + wdt_tclk = pdata->tclk; + } else { + printk(KERN_ERR "Orion5x Watchdog misses platform data\n"); + return -ENODEV; + } + + if (orion5x_wdt_miscdev.parent) + return -EBUSY; + orion5x_wdt_miscdev.parent = &pdev->dev; + + wdt_max_duration = WDT_MAX_CYCLE_COUNT / wdt_tclk; + if (heartbeat <= 0 || heartbeat > wdt_max_duration) + heartbeat = wdt_max_duration; ret = misc_register(&orion5x_wdt_miscdev); - if (ret == 0) - printk("Orion5x Watchdog Timer: heartbeat %d sec\n", - heartbeat); + if (ret) + return ret; + + printk(KERN_INFO "Orion5x Watchdog Timer: Initial timeout %d sec%s\n", + heartbeat, nowayout ? ", nowayout" : ""); + return 0; +} + +static int __devexit orion5x_wdt_remove(struct platform_device *pdev) +{ + int ret; + + if (test_bit(WDT_IN_USE, &wdt_status)) { + wdt_disable(); + clear_bit(WDT_IN_USE, &wdt_status); + } + + ret = misc_deregister(&orion5x_wdt_miscdev); + if (!ret) + orion5x_wdt_miscdev.parent = NULL; return ret; } +static struct platform_driver orion5x_wdt_driver = { + .probe = orion5x_wdt_probe, + .remove = __devexit_p(orion5x_wdt_remove), + .driver = { + .owner = THIS_MODULE, + .name = "orion5x_wdt", + }, +}; + +static int __init orion5x_wdt_init(void) +{ + spin_lock_init(&wdt_lock); + return platform_driver_register(&orion5x_wdt_driver); +} + static void __exit orion5x_wdt_exit(void) { - misc_deregister(&orion5x_wdt_miscdev); + platform_driver_unregister(&orion5x_wdt_driver); } module_init(orion5x_wdt_init); @@ -236,8 +285,7 @@ MODULE_AUTHOR("Sylver Bruneau "); MODULE_DESCRIPTION("Orion5x Processor Watchdog"); module_param(heartbeat, int, 0); -MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds (default is " - __MODULE_STRING(WDT_MAX_DURATION) ")"); +MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds"); module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started"); -- cgit v1.2.3