DM9000: Add support for DM9000A and DM9000B chips
Add support for both the DM9000A and DM9000B versions of the DM9000 networking chip. This includes adding support for the Link-Change IRQ which is used instead of polling the PHY every 2 seconds. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>hifive-unleashed-5.1
Ben Dooks
Jeff Garzik
parent
da3854fc9f
commit
6d406b3c76
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@ -85,6 +85,16 @@ MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
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* these two devices.
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*/
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/* The driver supports the original DM9000E, and now the two newer
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* devices, DM9000A and DM9000B.
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*/
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enum dm9000_type {
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TYPE_DM9000E, /* original DM9000 */
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TYPE_DM9000A,
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TYPE_DM9000B
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};
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/* Structure/enum declaration ------------------------------- */
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typedef struct board_info {
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@ -98,9 +108,11 @@ typedef struct board_info {
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u16 dbug_cnt;
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u8 io_mode; /* 0:word, 2:byte */
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u8 phy_addr;
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u8 imr_all;
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unsigned int flags;
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unsigned int in_suspend :1;
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enum dm9000_type type;
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int debug_level;
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void (*inblk)(void __iomem *port, void *data, int length);
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@ -302,7 +314,8 @@ static void dm9000_set_io(struct board_info *db, int byte_width)
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static void dm9000_schedule_poll(board_info_t *db)
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{
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schedule_delayed_work(&db->phy_poll, HZ * 2);
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if (db->type == TYPE_DM9000E)
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schedule_delayed_work(&db->phy_poll, HZ * 2);
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}
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/* Our watchdog timed out. Called by the networking layer */
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@ -516,6 +529,17 @@ dm9000_release_board(struct platform_device *pdev, struct board_info *db)
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}
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}
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static unsigned char dm9000_type_to_char(enum dm9000_type type)
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{
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switch (type) {
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case TYPE_DM9000E: return 'e';
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case TYPE_DM9000A: return 'a';
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case TYPE_DM9000B: return 'b';
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}
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return '?';
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}
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#define res_size(_r) (((_r)->end - (_r)->start) + 1)
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/*
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@ -665,6 +689,23 @@ dm9000_probe(struct platform_device *pdev)
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goto out;
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}
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/* Identify what type of DM9000 we are working on */
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id_val = ior(db, DM9000_CHIPR);
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dev_dbg(db->dev, "dm9000 revision 0x%02x\n", id_val);
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switch (id_val) {
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case CHIPR_DM9000A:
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db->type = TYPE_DM9000A;
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break;
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case CHIPR_DM9000B:
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db->type = TYPE_DM9000B;
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break;
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default:
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dev_dbg(db->dev, "ID %02x => defaulting to DM9000E\n", id_val);
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db->type = TYPE_DM9000E;
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}
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/* from this point we assume that we have found a DM9000 */
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/* driver system function */
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@ -715,8 +756,9 @@ dm9000_probe(struct platform_device *pdev)
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if (ret == 0) {
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DECLARE_MAC_BUF(mac);
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printk("%s: dm9000 at %p,%p IRQ %d MAC: %s (%s)\n",
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ndev->name, db->io_addr, db->io_data, ndev->irq,
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printk(KERN_INFO "%s: dm9000%c at %p,%p IRQ %d MAC: %s (%s)\n",
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ndev->name, dm9000_type_to_char(db->type),
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db->io_addr, db->io_data, ndev->irq,
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print_mac(mac, ndev->dev_addr), mac_src);
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}
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return 0;
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@ -778,6 +820,7 @@ static void
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dm9000_init_dm9000(struct net_device *dev)
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{
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board_info_t *db = (board_info_t *) dev->priv;
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unsigned int imr;
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dm9000_dbg(db, 1, "entering %s\n", __func__);
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@ -804,8 +847,14 @@ dm9000_init_dm9000(struct net_device *dev)
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/* Set address filter table */
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dm9000_hash_table(dev);
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imr = IMR_PAR | IMR_PTM | IMR_PRM;
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if (db->type != TYPE_DM9000E)
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imr |= IMR_LNKCHNG;
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db->imr_all = imr;
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/* Enable TX/RX interrupt mask */
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iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
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iow(db, DM9000_IMR, imr);
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/* Init Driver variable */
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db->tx_pkt_cnt = 0;
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@ -962,8 +1011,15 @@ dm9000_interrupt(int irq, void *dev_id)
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if (int_status & ISR_PTS)
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dm9000_tx_done(dev, db);
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if (db->type != TYPE_DM9000E) {
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if (int_status & ISR_LNKCHNG) {
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/* fire a link-change request */
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schedule_delayed_work(&db->phy_poll, 1);
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}
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}
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/* Re-enable interrupt mask */
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iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
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iow(db, DM9000_IMR, db->imr_all);
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/* Restore previous register address */
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writeb(reg_save, db->io_addr);
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@ -45,6 +45,9 @@
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#define DM9000_CHIPR 0x2C
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#define DM9000_SMCR 0x2F
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#define CHIPR_DM9000A 0x19
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#define CHIPR_DM9000B 0x1B
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#define DM9000_MRCMDX 0xF0
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#define DM9000_MRCMD 0xF2
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#define DM9000_MRRL 0xF4
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@ -131,5 +134,13 @@
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#define DM9000_PKT_RDY 0x01 /* Packet ready to receive */
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#define DM9000_PKT_MAX 1536 /* Received packet max size */
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/* DM9000A / DM9000B definitions */
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#define IMR_LNKCHNG (1<<5)
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#define IMR_UNDERRUN (1<<4)
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#define ISR_LNKCHNG (1<<5)
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#define ISR_UNDERRUN (1<<4)
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#endif /* _DM9000X_H_ */
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