From 05c3e68f8518809616cd4ec5523d3f1e423ee41a Mon Sep 17 00:00:00 2001 From: Joe Hershberger Date: Sun, 22 Mar 2015 17:09:10 -0500 Subject: dm: eth: Add basic driver model support to Ethernet stack First just add support for MAC drivers. Signed-off-by: Joe Hershberger Reviewed-by: Simon Glass --- net/eth.c | 346 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 340 insertions(+), 6 deletions(-) (limited to 'net') diff --git a/net/eth.c b/net/eth.c index 66ecb79d55..1abf0274b4 100644 --- a/net/eth.c +++ b/net/eth.c @@ -1,16 +1,19 @@ /* - * (C) Copyright 2001-2010 + * (C) Copyright 2001-2015 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * Joe Hershberger, National Instruments * * SPDX-License-Identifier: GPL-2.0+ */ #include #include +#include #include #include #include #include +#include DECLARE_GLOBAL_DATA_PTR; @@ -76,6 +79,339 @@ static int eth_mac_skip(int index) static void eth_current_changed(void); +#ifdef CONFIG_DM_ETH +/** + * struct eth_device_priv - private structure for each Ethernet device + * + * @state: The state of the Ethernet MAC driver (defined by enum eth_state_t) + */ +struct eth_device_priv { + enum eth_state_t state; +}; + +/** + * struct eth_uclass_priv - The structure attached to the uclass itself + * + * @current: The Ethernet device that the network functions are using + */ +struct eth_uclass_priv { + struct udevice *current; +}; + +static struct eth_uclass_priv *eth_get_uclass_priv(void) +{ + struct uclass *uc; + + uclass_get(UCLASS_ETH, &uc); + assert(uc); + return uc->priv; +} + +static void eth_set_current_to_next(void) +{ + struct eth_uclass_priv *uc_priv; + + uc_priv = eth_get_uclass_priv(); + if (uc_priv->current) + uclass_next_device(&uc_priv->current); + if (!uc_priv->current) + uclass_first_device(UCLASS_ETH, &uc_priv->current); +} + +struct udevice *eth_get_dev(void) +{ + struct eth_uclass_priv *uc_priv; + + uc_priv = eth_get_uclass_priv(); + if (!uc_priv->current) + uclass_first_device(UCLASS_ETH, + &uc_priv->current); + return uc_priv->current; +} + +static void eth_set_dev(struct udevice *dev) +{ + device_probe(dev); + eth_get_uclass_priv()->current = dev; +} + +unsigned char *eth_get_ethaddr(void) +{ + struct eth_pdata *pdata; + + if (eth_get_dev()) { + pdata = eth_get_dev()->platdata; + return pdata->enetaddr; + } + + return NULL; +} + +/* Set active state without calling start on the driver */ +int eth_init_state_only(void) +{ + struct udevice *current; + struct eth_device_priv *priv; + + current = eth_get_dev(); + if (!current || !device_active(current)) + return -EINVAL; + + priv = current->uclass_priv; + priv->state = ETH_STATE_ACTIVE; + + return 0; +} + +/* Set passive state without calling stop on the driver */ +void eth_halt_state_only(void) +{ + struct udevice *current; + struct eth_device_priv *priv; + + current = eth_get_dev(); + if (!current || !device_active(current)) + return; + + priv = current->uclass_priv; + priv->state = ETH_STATE_PASSIVE; +} + +int eth_get_dev_index(void) +{ + if (eth_get_dev()) + return eth_get_dev()->seq; + return -1; +} + +int eth_init(void) +{ + struct udevice *current; + struct udevice *old_current; + + current = eth_get_dev(); + if (!current) { + printf("No ethernet found.\n"); + return -ENODEV; + } + + old_current = current; + do { + debug("Trying %s\n", current->name); + + if (device_active(current)) { + uchar env_enetaddr[6]; + struct eth_pdata *pdata = current->platdata; + + /* Sync environment with network device */ + if (eth_getenv_enetaddr_by_index("eth", current->seq, + env_enetaddr)) + memcpy(pdata->enetaddr, env_enetaddr, 6); + else + memset(pdata->enetaddr, 0, 6); + + if (eth_get_ops(current)->start(current) >= 0) { + struct eth_device_priv *priv = + current->uclass_priv; + + priv->state = ETH_STATE_ACTIVE; + return 0; + } + } + debug("FAIL\n"); + + /* This will ensure the new "current" attempted to probe */ + eth_try_another(0); + current = eth_get_dev(); + } while (old_current != current); + + return -ENODEV; +} + +void eth_halt(void) +{ + struct udevice *current; + struct eth_device_priv *priv; + + current = eth_get_dev(); + if (!current || !device_active(current)) + return; + + eth_get_ops(current)->stop(current); + priv = current->uclass_priv; + priv->state = ETH_STATE_PASSIVE; +} + +int eth_send(void *packet, int length) +{ + struct udevice *current; + + current = eth_get_dev(); + if (!current) + return -ENODEV; + + if (!device_active(current)) + return -EINVAL; + + return eth_get_ops(current)->send(current, packet, length); +} + +int eth_rx(void) +{ + struct udevice *current; + + current = eth_get_dev(); + if (!current) + return -ENODEV; + + if (!device_active(current)) + return -EINVAL; + + return eth_get_ops(current)->recv(current); +} + +static int eth_write_hwaddr(struct udevice *dev) +{ + struct eth_pdata *pdata = dev->platdata; + int ret = 0; + + if (!dev || !device_active(dev)) + return -EINVAL; + + /* seq is valid since the device is active */ + if (eth_get_ops(dev)->write_hwaddr && !eth_mac_skip(dev->seq)) { + if (!is_valid_ether_addr(pdata->enetaddr)) { + printf("\nError: %s address %pM illegal value\n", + dev->name, pdata->enetaddr); + return -EINVAL; + } + + ret = eth_get_ops(dev)->write_hwaddr(dev); + if (ret) + printf("\nWarning: %s failed to set MAC address\n", + dev->name); + } + + return ret; +} + +int eth_initialize(void) +{ + int num_devices = 0; + struct udevice *dev; + + bootstage_mark(BOOTSTAGE_ID_NET_ETH_START); + eth_env_init(); + + /* + * Devices need to write the hwaddr even if not started so that Linux + * will have access to the hwaddr that u-boot stored for the device. + * This is accomplished by attempting to probe each device and calling + * their write_hwaddr() operation. + */ + uclass_first_device(UCLASS_ETH, &dev); + if (!dev) { + printf("No ethernet found.\n"); + bootstage_error(BOOTSTAGE_ID_NET_ETH_START); + } else { + bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT); + do { + if (num_devices) + printf(", "); + + printf("eth%d: %s", dev->seq, dev->name); + + eth_write_hwaddr(dev); + + uclass_next_device(&dev); + num_devices++; + } while (dev); + + putc('\n'); + } + + return num_devices; +} + +static int eth_post_bind(struct udevice *dev) +{ + if (strchr(dev->name, ' ')) { + printf("\nError: eth device name \"%s\" has a space!\n", + dev->name); + return -EINVAL; + } + + return 0; +} + +static int eth_pre_unbind(struct udevice *dev) +{ + /* Don't hang onto a pointer that is going away */ + if (dev == eth_get_uclass_priv()->current) + eth_set_dev(NULL); + + return 0; +} + +static int eth_post_probe(struct udevice *dev) +{ + struct eth_device_priv *priv = dev->uclass_priv; + struct eth_pdata *pdata = dev->platdata; + unsigned char env_enetaddr[6]; + + priv->state = ETH_STATE_INIT; + + /* Check if the device has a MAC address in ROM */ + if (eth_get_ops(dev)->read_rom_hwaddr) + eth_get_ops(dev)->read_rom_hwaddr(dev); + + eth_getenv_enetaddr_by_index("eth", dev->seq, env_enetaddr); + if (!is_zero_ether_addr(env_enetaddr)) { + if (!is_zero_ether_addr(pdata->enetaddr) && + memcmp(pdata->enetaddr, env_enetaddr, 6)) { + printf("\nWarning: %s MAC addresses don't match:\n", + dev->name); + printf("Address in SROM is %pM\n", + pdata->enetaddr); + printf("Address in environment is %pM\n", + env_enetaddr); + } + + /* Override the ROM MAC address */ + memcpy(pdata->enetaddr, env_enetaddr, 6); + } else if (is_valid_ether_addr(pdata->enetaddr)) { + eth_setenv_enetaddr_by_index("eth", dev->seq, pdata->enetaddr); + printf("\nWarning: %s using MAC address from ROM\n", + dev->name); + } else if (is_zero_ether_addr(pdata->enetaddr)) { + printf("\nError: %s address not set.\n", + dev->name); + return -EINVAL; + } + + return 0; +} + +static int eth_pre_remove(struct udevice *dev) +{ + eth_get_ops(dev)->stop(dev); + + return 0; +} + +UCLASS_DRIVER(eth) = { + .name = "eth", + .id = UCLASS_ETH, + .post_bind = eth_post_bind, + .pre_unbind = eth_pre_unbind, + .post_probe = eth_post_probe, + .pre_remove = eth_pre_remove, + .priv_auto_alloc_size = sizeof(struct eth_uclass_priv), + .per_device_auto_alloc_size = sizeof(struct eth_device_priv), +}; +#endif + +#ifndef CONFIG_DM_ETH /* * CPU and board-specific Ethernet initializations. Aliased function * signals caller to move on @@ -427,6 +763,7 @@ int eth_rx(void) return eth_current->recv(eth_current); } +#endif /* ifndef CONFIG_DM_ETH */ #ifdef CONFIG_API static void eth_save_packet(void *packet, int length) @@ -490,7 +827,7 @@ static void eth_current_changed(void) void eth_try_another(int first_restart) { - static struct eth_device *first_failed; + static void *first_failed; char *ethrotate; /* @@ -519,12 +856,9 @@ void eth_set_current(void) { static char *act; static int env_changed_id; - struct eth_device *old_current; + void *old_current; int env_id; - if (!eth_get_dev()) /* XXX no current */ - return; - env_id = get_env_id(); if ((act == NULL) || (env_changed_id != env_id)) { act = getenv("ethact"); -- cgit v1.2.3