[U-Boot] [PATCH v2 3/6] net: e1000: Convert to driver model
Simon Glass
sjg at chromium.org
Tue Aug 11 15:39:26 CEST 2015
Update this driver to support driver model.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
Changes in v2: None
drivers/net/e1000.c | 137 ++++++++++++++++++++++++++++++++++++++++++++++++++++
drivers/net/e1000.h | 4 ++
2 files changed, 141 insertions(+)
diff --git a/drivers/net/e1000.c b/drivers/net/e1000.c
index 11bf9ca..25d0b39 100644
--- a/drivers/net/e1000.c
+++ b/drivers/net/e1000.c
@@ -30,6 +30,7 @@ tested on both gig copper and gig fiber boards
*/
#include <common.h>
+#include <dm.h>
#include <errno.h>
#include <pci.h>
#include "e1000.h"
@@ -47,12 +48,21 @@ tested on both gig copper and gig fiber boards
/* Intel i210 needs the DMA descriptor rings aligned to 128b */
#define E1000_BUFFER_ALIGN 128
+/*
+ * TODO(sjg at chromium.org): Even with driver model we share these buffers.
+ * Concurrent receiving on multiple active Ethernet devices will not work.
+ * Normally U-Boot does not support this anyway. To fix it in this driver,
+ * nove these buffers and the tx/rx pointers to struct e1000_hw.
+ */
DEFINE_ALIGN_BUFFER(struct e1000_tx_desc, tx_base, 16, E1000_BUFFER_ALIGN);
DEFINE_ALIGN_BUFFER(struct e1000_rx_desc, rx_base, 16, E1000_BUFFER_ALIGN);
DEFINE_ALIGN_BUFFER(unsigned char, packet, 4096, E1000_BUFFER_ALIGN);
static int tx_tail;
static int rx_tail, rx_last;
+#ifdef CONFIG_DM_ETH
+static int num_cards; /* Number of E1000 devices seen so far */
+#endif
static struct pci_device_id e1000_supported[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82542) },
@@ -5279,8 +5289,10 @@ void e1000_get_bus_type(struct e1000_hw *hw)
}
}
+#ifndef CONFIG_DM_ETH
/* A list of all registered e1000 devices */
static LIST_HEAD(e1000_hw_list);
+#endif
static int e1000_init_one(struct e1000_hw *hw, int cardnum, pci_dev_t devno,
unsigned char enetaddr[6])
@@ -5367,6 +5379,7 @@ static void e1000_name(char *str, int cardnum)
sprintf(str, "e1000#%u", cardnum);
}
+#ifndef CONFIG_DM_ETH
/**************************************************************************
TRANSMIT - Transmit a frame
***************************************************************************/
@@ -5479,13 +5492,22 @@ struct e1000_hw *e1000_find_card(unsigned int cardnum)
return NULL;
}
+#endif /* nCONFIG_DM_ETH */
#ifdef CONFIG_CMD_E1000
static int do_e1000(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
unsigned char *mac = NULL;
+#ifdef CONFIG_DM_ETH
+ struct eth_pdata *plat;
+ struct udevice *dev;
+ char name[30];
+ int ret;
+#else
struct e1000_hw *hw;
+#endif
+ int cardnum;
if (argc < 3) {
cmd_usage(cmdtp);
@@ -5494,9 +5516,18 @@ static int do_e1000(cmd_tbl_t *cmdtp, int flag,
/* Make sure we can find the requested e1000 card */
cardnum = simple_strtoul(argv[1], NULL, 10);
+#ifdef CONFIG_DM_ETH
+ e1000_name(name, cardnum);
+ ret = uclass_get_device_by_name(UCLASS_ETH, name, &dev);
+ if (!ret) {
+ plat = dev_get_platdata(dev);
+ mac = plat->enetaddr;
+ }
+#else
hw = e1000_find_card(cardnum);
if (hw)
mac = hw->nic->enetaddr;
+#endif
if (!mac) {
printf("e1000: ERROR: No such device: e1000#%s\n", argv[1]);
return 1;
@@ -5531,3 +5562,109 @@ U_BOOT_CMD(
" - Manage the Intel E1000 PCI device"
);
#endif /* not CONFIG_CMD_E1000 */
+
+#ifdef CONFIG_DM_ETH
+static int e1000_eth_start(struct udevice *dev)
+{
+ struct eth_pdata *plat = dev_get_platdata(dev);
+ struct e1000_hw *hw = dev_get_priv(dev);
+
+ return _e1000_init(hw, plat->enetaddr);
+}
+
+static void e1000_eth_stop(struct udevice *dev)
+{
+ struct e1000_hw *hw = dev_get_priv(dev);
+
+ _e1000_disable(hw);
+}
+
+static int e1000_eth_send(struct udevice *dev, void *packet, int length)
+{
+ struct e1000_hw *hw = dev_get_priv(dev);
+ int ret;
+
+ ret = _e1000_transmit(hw, packet, length);
+
+ return ret ? 0 : -ETIMEDOUT;
+}
+
+static int e1000_eth_recv(struct udevice *dev, int flags, uchar **packetp)
+{
+ struct e1000_hw *hw = dev_get_priv(dev);
+ int len;
+
+ len = _e1000_poll(hw);
+ if (len)
+ *packetp = packet;
+
+ return len ? len : -EAGAIN;
+}
+
+static int e1000_free_pkt(struct udevice *dev, uchar *packet, int length)
+{
+ struct e1000_hw *hw = dev_get_priv(dev);
+
+ fill_rx(hw);
+
+ return 0;
+}
+
+static int e1000_eth_probe(struct udevice *dev)
+{
+ struct eth_pdata *plat = dev_get_platdata(dev);
+ struct e1000_hw *hw = dev_get_priv(dev);
+ int ret;
+
+ hw->name = dev->name;
+ ret = e1000_init_one(hw, trailing_strtol(dev->name), pci_get_bdf(dev),
+ plat->enetaddr);
+ if (ret < 0) {
+ printf(pr_fmt("failed to initialize card: %d\n"), ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int e1000_eth_bind(struct udevice *dev)
+{
+ char name[20];
+
+ /*
+ * A simple way to number the devices. When device tree is used this
+ * is unnecessary, but when the device is just discovered on the PCI
+ * bus we need a name. We could instead have the uclass figure out
+ * which devices are different and number them.
+ */
+ e1000_name(name, num_cards++);
+
+ return device_set_name(dev, name);
+}
+
+static const struct eth_ops e1000_eth_ops = {
+ .start = e1000_eth_start,
+ .send = e1000_eth_send,
+ .recv = e1000_eth_recv,
+ .stop = e1000_eth_stop,
+ .free_pkt = e1000_free_pkt,
+};
+
+static const struct udevice_id e1000_eth_ids[] = {
+ { .compatible = "realtek,e1000" },
+ { }
+};
+
+U_BOOT_DRIVER(eth_e1000) = {
+ .name = "eth_e1000",
+ .id = UCLASS_ETH,
+ .of_match = e1000_eth_ids,
+ .bind = e1000_eth_bind,
+ .probe = e1000_eth_probe,
+ .ops = &e1000_eth_ops,
+ .priv_auto_alloc_size = sizeof(struct e1000_hw),
+ .platdata_auto_alloc_size = sizeof(struct eth_pdata),
+};
+
+U_BOOT_PCI_DEVICE(eth_e1000, e1000_supported);
+#endif
diff --git a/drivers/net/e1000.h b/drivers/net/e1000.h
index bfacd4e..543459d 100644
--- a/drivers/net/e1000.h
+++ b/drivers/net/e1000.h
@@ -22,7 +22,9 @@
#include <linux/list.h>
#include <malloc.h>
#include <net.h>
+#ifndef CONFIG_DM_ETH
#include <netdev.h>
+#endif
#include <asm/io.h>
#include <pci.h>
@@ -1073,7 +1075,9 @@ typedef enum {
struct e1000_hw {
const char *name;
struct list_head list_node;
+#ifndef CONFIG_DM_ETH
struct eth_device *nic;
+#endif
#ifdef CONFIG_E1000_SPI
struct spi_slave spi;
#endif
--
2.5.0.rc2.392.g76e840b
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