diff options
Diffstat (limited to 'target/linux/ar7/patches-3.3')
| -rw-r--r-- | target/linux/ar7/patches-3.3/110-flash.patch | 22 | ||||
| -rw-r--r-- | target/linux/ar7/patches-3.3/120-gpio_chrdev.patch | 28 | ||||
| -rw-r--r-- | target/linux/ar7/patches-3.3/160-vlynq_try_remote_first.patch | 20 | ||||
| -rw-r--r-- | target/linux/ar7/patches-3.3/500-serial_kludge.patch | 28 | ||||
| -rw-r--r-- | target/linux/ar7/patches-3.3/920-ar7part.patch | 56 | ||||
| -rw-r--r-- | target/linux/ar7/patches-3.3/950-cpmac_titan.patch | 52 | ||||
| -rw-r--r-- | target/linux/ar7/patches-3.3/972-cpmac_fixup.patch | 218 | ||||
| -rw-r--r-- | target/linux/ar7/patches-3.3/973-cpmac_handle_mvswitch.patch | 70 |
8 files changed, 494 insertions, 0 deletions
diff --git a/target/linux/ar7/patches-3.3/110-flash.patch b/target/linux/ar7/patches-3.3/110-flash.patch new file mode 100644 index 0000000000..58ce7eaa40 --- /dev/null +++ b/target/linux/ar7/patches-3.3/110-flash.patch @@ -0,0 +1,22 @@ +--- a/drivers/mtd/maps/physmap.c ++++ b/drivers/mtd/maps/physmap.c +@@ -78,7 +78,7 @@ static const char *rom_probe_types[] = { + "map_rom", + NULL }; + static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", "afs", +- NULL }; ++ "ar7part", NULL }; + + static int physmap_flash_probe(struct platform_device *dev) + { +--- a/drivers/mtd/Makefile ++++ b/drivers/mtd/Makefile +@@ -10,7 +10,7 @@ obj-$(CONFIG_MTD_OF_PARTS) += ofpart.o + obj-$(CONFIG_MTD_REDBOOT_PARTS) += redboot.o + obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdlinepart.o + obj-$(CONFIG_MTD_AFS_PARTS) += afs.o +-obj-$(CONFIG_MTD_AR7_PARTS) += ar7part.o ++obj-$(CONFIG_MTD_AR7_PARTS) += ar7part.o titanpart.o + obj-$(CONFIG_MTD_BCM63XX_PARTS) += bcm63xxpart.o + obj-$(CONFIG_MTD_MYLOADER_PARTS) += myloader.o + diff --git a/target/linux/ar7/patches-3.3/120-gpio_chrdev.patch b/target/linux/ar7/patches-3.3/120-gpio_chrdev.patch new file mode 100644 index 0000000000..006cef4d5b --- /dev/null +++ b/target/linux/ar7/patches-3.3/120-gpio_chrdev.patch @@ -0,0 +1,28 @@ +--- a/drivers/char/Kconfig ++++ b/drivers/char/Kconfig +@@ -478,6 +478,15 @@ config MWAVE + To compile this driver as a module, choose M here: the + module will be called mwave. + ++config AR7_GPIO ++ tristate "TI AR7 GPIO Support" ++ depends on AR7 ++ help ++ Give userspace access to the GPIO pins on the Texas Instruments AR7 ++ processors. ++ ++ If compiled as a module, it will be called ar7_gpio. ++ + config SCx200_GPIO + tristate "NatSemi SCx200 GPIO Support" + depends on SCx200 +--- a/drivers/char/Makefile ++++ b/drivers/char/Makefile +@@ -44,6 +44,7 @@ obj-$(CONFIG_HW_RANDOM) += hw_random/ + obj-$(CONFIG_PPDEV) += ppdev.o + obj-$(CONFIG_NWBUTTON) += nwbutton.o + obj-$(CONFIG_NWFLASH) += nwflash.o ++obj-$(CONFIG_AR7_GPIO) += ar7_gpio.o + obj-$(CONFIG_SCx200_GPIO) += scx200_gpio.o + obj-$(CONFIG_PC8736x_GPIO) += pc8736x_gpio.o + obj-$(CONFIG_NSC_GPIO) += nsc_gpio.o diff --git a/target/linux/ar7/patches-3.3/160-vlynq_try_remote_first.patch b/target/linux/ar7/patches-3.3/160-vlynq_try_remote_first.patch new file mode 100644 index 0000000000..437bc89d93 --- /dev/null +++ b/target/linux/ar7/patches-3.3/160-vlynq_try_remote_first.patch @@ -0,0 +1,20 @@ +--- a/drivers/vlynq/vlynq.c ++++ b/drivers/vlynq/vlynq.c +@@ -514,9 +514,14 @@ static int __vlynq_enable_device(struct + !__vlynq_try_external(dev)) + return 0; + } else { +- if (!__vlynq_try_external(dev) || +- !__vlynq_try_local(dev) || +- !__vlynq_try_remote(dev)) ++ /* XXX: I don't really know what difference it makes, if the order ++ * of the following calls is changed, but at least in this order ++ * my fritzbox doesn't hang at startup as in ++ * https://dev.openwrt.org/ticket/7324 ++ */ ++ if (!__vlynq_try_remote(dev) || ++ !__vlynq_try_local(dev) || ++ !__vlynq_try_external(dev)) + return 0; + } + break; diff --git a/target/linux/ar7/patches-3.3/500-serial_kludge.patch b/target/linux/ar7/patches-3.3/500-serial_kludge.patch new file mode 100644 index 0000000000..5c19cf22b6 --- /dev/null +++ b/target/linux/ar7/patches-3.3/500-serial_kludge.patch @@ -0,0 +1,28 @@ +--- a/drivers/tty/serial/8250/8250.c ++++ b/drivers/tty/serial/8250/8250.c +@@ -290,6 +290,13 @@ static const struct serial8250_config ua + .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, + .flags = UART_CAP_FIFO | UART_CAP_AFE | UART_CAP_EFR, + }, ++ [PORT_AR7] = { ++ .name = "TI-AR7", ++ .fifo_size = 16, ++ .tx_loadsz = 16, ++ .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_00, ++ .flags = UART_CAP_FIFO | UART_CAP_AFE, ++ }, + }; + + #if defined(CONFIG_MIPS_ALCHEMY) +@@ -2798,7 +2805,11 @@ static void serial8250_console_putchar(s + struct uart_8250_port *up = + container_of(port, struct uart_8250_port, port); + ++#ifdef CONFIG_AR7 ++ wait_for_xmitr(up, BOTH_EMPTY); ++#else + wait_for_xmitr(up, UART_LSR_THRE); ++#endif + serial_out(up, UART_TX, ch); + } + diff --git a/target/linux/ar7/patches-3.3/920-ar7part.patch b/target/linux/ar7/patches-3.3/920-ar7part.patch new file mode 100644 index 0000000000..9cbc53786d --- /dev/null +++ b/target/linux/ar7/patches-3.3/920-ar7part.patch @@ -0,0 +1,56 @@ +--- a/drivers/mtd/ar7part.c ++++ b/drivers/mtd/ar7part.c +@@ -29,11 +29,14 @@ + #include <linux/magic.h> + #include <linux/module.h> + ++#include <asm/mach-ar7/prom.h> ++ + #define AR7_PARTS 4 + #define ROOT_OFFSET 0xe0000 + + #define LOADER_MAGIC1 le32_to_cpu(0xfeedfa42) + #define LOADER_MAGIC2 le32_to_cpu(0xfeed1281) ++#define LOADER_MAGIC3 le32_to_cpu(0x434d4d4c) + + #ifndef SQUASHFS_MAGIC + #define SQUASHFS_MAGIC 0x73717368 +@@ -45,6 +48,10 @@ struct ar7_bin_rec { + unsigned int address; + }; + ++int create_titan_partitions(struct mtd_info *master, ++ struct mtd_partition **pparts, ++ struct mtd_part_parser_data *data); ++ + static int create_mtd_partitions(struct mtd_info *master, + struct mtd_partition **pparts, + struct mtd_part_parser_data *data) +@@ -58,6 +65,16 @@ static int create_mtd_partitions(struct + int retries = 10; + struct mtd_partition *ar7_parts; + ++ const char *prod_id ; ++ prod_id = prom_getenv("ProductID"); ++ if(prod_id && ++ (strcmp(prod_id, "CYWL")==0 || ++ strcmp(prod_id, "CYWM")==0 || ++ strcmp(prod_id, "CYLM")==0 || ++ strcmp(prod_id, "CYLL")==0)){ ++ return create_titan_partitions(master, pparts, data); ++ } ++ + ar7_parts = kzalloc(sizeof(*ar7_parts) * AR7_PARTS, GFP_KERNEL); + if (!ar7_parts) + return -ENOMEM; +--- a/drivers/mtd/titanpart.c ++++ b/drivers/mtd/titanpart.c +@@ -149,7 +149,7 @@ static void titan_add_partition(char * e + } + int create_titan_partitions(struct mtd_info *master, + struct mtd_partition **pparts, +- unsigned long origin) ++ struct mtd_part_parser_data *data) + { + struct nsp_img_hdr_head hdr; + struct nsp_img_hdr_section_info sect_info; diff --git a/target/linux/ar7/patches-3.3/950-cpmac_titan.patch b/target/linux/ar7/patches-3.3/950-cpmac_titan.patch new file mode 100644 index 0000000000..a829e4e8c4 --- /dev/null +++ b/target/linux/ar7/patches-3.3/950-cpmac_titan.patch @@ -0,0 +1,52 @@ +--- a/drivers/net/ethernet/ti/cpmac.c ++++ b/drivers/net/ethernet/ti/cpmac.c +@@ -1159,6 +1159,8 @@ static int __devinit cpmac_probe(struct + goto fail; + } + ++ ar7_device_reset(pdata->reset_bit); ++ + dev->irq = platform_get_irq_byname(pdev, "irq"); + + dev->netdev_ops = &cpmac_netdev_ops; +@@ -1237,7 +1239,7 @@ int __devinit cpmac_init(void) + cpmac_mii->reset = cpmac_mdio_reset; + cpmac_mii->irq = mii_irqs; + +- cpmac_mii->priv = ioremap(AR7_REGS_MDIO, 256); ++ cpmac_mii->priv = ioremap(ar7_is_titan() ? TITAN_REGS_MDIO : AR7_REGS_MDIO, 256); + + if (!cpmac_mii->priv) { + printk(KERN_ERR "Can't ioremap mdio registers\n"); +@@ -1248,10 +1250,16 @@ int __devinit cpmac_init(void) + #warning FIXME: unhardcode gpio&reset bits + ar7_gpio_disable(26); + ar7_gpio_disable(27); +- ar7_device_reset(AR7_RESET_BIT_CPMAC_LO); +- ar7_device_reset(AR7_RESET_BIT_CPMAC_HI); ++ ++ if (!ar7_is_titan()) { ++ ar7_device_reset(AR7_RESET_BIT_CPMAC_LO); ++ ar7_device_reset(AR7_RESET_BIT_CPMAC_HI); ++ } + ar7_device_reset(AR7_RESET_BIT_EPHY); + ++ if (ar7_is_titan()) ++ ar7_device_reset(TITAN_RESET_BIT_EPHY1); ++ + cpmac_mii->reset(cpmac_mii); + + for (i = 0; i < 300; i++) { +@@ -1268,7 +1276,11 @@ int __devinit cpmac_init(void) + mask = 0; + } + +- cpmac_mii->phy_mask = ~(mask | 0x80000000); ++ if (ar7_is_titan()) ++ cpmac_mii->phy_mask = ~(mask | 0x80000000 | 0x40000000); ++ else ++ cpmac_mii->phy_mask = ~(mask | 0x80000000); ++ + snprintf(cpmac_mii->id, MII_BUS_ID_SIZE, "cpmac-1"); + + res = mdiobus_register(cpmac_mii); diff --git a/target/linux/ar7/patches-3.3/972-cpmac_fixup.patch b/target/linux/ar7/patches-3.3/972-cpmac_fixup.patch new file mode 100644 index 0000000000..b1eb081c99 --- /dev/null +++ b/target/linux/ar7/patches-3.3/972-cpmac_fixup.patch @@ -0,0 +1,218 @@ +--- a/arch/mips/ar7/platform.c ++++ b/arch/mips/ar7/platform.c +@@ -33,7 +33,6 @@ + #include <linux/string.h> + #include <linux/etherdevice.h> + #include <linux/phy.h> +-#include <linux/phy_fixed.h> + #include <linux/gpio.h> + #include <linux/clk.h> + +@@ -248,12 +247,6 @@ static struct resource cpmac_high_res[] + }, + }; + +-static struct fixed_phy_status fixed_phy_status __initdata = { +- .link = 1, +- .speed = 100, +- .duplex = 1, +-}; +- + static struct plat_cpmac_data cpmac_low_data = { + .reset_bit = 17, + .power_bit = 20, +@@ -680,26 +673,18 @@ static int __init ar7_register_devices(v + } + + if (ar7_has_high_cpmac()) { +- res = fixed_phy_add(PHY_POLL, cpmac_high.id, &fixed_phy_status); +- if (!res) { +- cpmac_get_mac(1, cpmac_high_data.dev_addr); +- +- res = platform_device_register(&cpmac_high); +- if (res) +- pr_warning("unable to register cpmac-high: %d\n", res); +- } else +- pr_warning("unable to add cpmac-high phy: %d\n", res); +- } else +- cpmac_low_data.phy_mask = 0xffffffff; ++ cpmac_get_mac(1, cpmac_high_data.dev_addr); + +- res = fixed_phy_add(PHY_POLL, cpmac_low.id, &fixed_phy_status); +- if (!res) { +- cpmac_get_mac(0, cpmac_low_data.dev_addr); +- res = platform_device_register(&cpmac_low); ++ res = platform_device_register(&cpmac_high); + if (res) +- pr_warning("unable to register cpmac-low: %d\n", res); ++ pr_warning("unable to register cpmac-high: %d\n", res); + } else +- pr_warning("unable to add cpmac-low phy: %d\n", res); ++ cpmac_low_data.phy_mask = 0xffffffff; ++ ++ cpmac_get_mac(0, cpmac_low_data.dev_addr); ++ res = platform_device_register(&cpmac_low); ++ if (res) ++ pr_warning("unable to register cpmac-low: %d\n", res); + + detect_leds(); + res = platform_device_register(&ar7_gpio_leds); +@@ -712,8 +697,10 @@ static int __init ar7_register_devices(v + + /* Register watchdog only if enabled in hardware */ + bootcr = ioremap_nocache(AR7_REGS_DCL, 4); +- val = readl(bootcr); +- iounmap(bootcr); ++ if (bootcr) { ++ val = readl(bootcr); ++ iounmap(bootcr); ++ } + if (val & AR7_WDT_HW_ENA) { + if (ar7_has_high_vlynq()) + ar7_wdt_res.start = UR8_REGS_WDT; +--- a/arch/mips/include/asm/mach-ar7/ar7.h ++++ b/arch/mips/include/asm/mach-ar7/ar7.h +@@ -42,6 +42,7 @@ + #define AR7_REGS_PINSEL (AR7_REGS_BASE + 0x160C) + #define AR7_REGS_VLYNQ0 (AR7_REGS_BASE + 0x1800) + #define AR7_REGS_DCL (AR7_REGS_BASE + 0x1a00) ++#define AR7_REGS_MII (AR7_REGS_BASE + 0x1a08) + #define AR7_REGS_VLYNQ1 (AR7_REGS_BASE + 0x1c00) + #define AR7_REGS_MDIO (AR7_REGS_BASE + 0x1e00) + #define AR7_REGS_IRQ (AR7_REGS_BASE + 0x2400) +--- a/drivers/net/ethernet/ti/cpmac.c ++++ b/drivers/net/ethernet/ti/cpmac.c +@@ -35,7 +35,6 @@ + #include <linux/skbuff.h> + #include <linux/mii.h> + #include <linux/phy.h> +-#include <linux/phy_fixed.h> + #include <linux/platform_device.h> + #include <linux/dma-mapping.h> + #include <linux/clk.h> +@@ -48,14 +47,11 @@ MODULE_LICENSE("GPL"); + MODULE_ALIAS("platform:cpmac"); + + static int debug_level = 8; +-static int dumb_switch; + +-/* Next 2 are only used in cpmac_probe, so it's pointless to change them */ ++/* Next is only used in cpmac_probe, so it's pointless to change them */ + module_param(debug_level, int, 0444); +-module_param(dumb_switch, int, 0444); + + MODULE_PARM_DESC(debug_level, "Number of NETIF_MSG bits to enable"); +-MODULE_PARM_DESC(dumb_switch, "Assume switch is not connected to MDIO bus"); + + #define CPMAC_VERSION "0.5.2" + /* frame size + 802.1q tag + FCS size */ +@@ -674,9 +670,8 @@ static void cpmac_hw_start(struct net_de + for (i = 0; i < 8; i++) + cpmac_write(priv->regs, CPMAC_MAC_ADDR_LO(i), dev->dev_addr[5]); + cpmac_write(priv->regs, CPMAC_MAC_ADDR_MID, dev->dev_addr[4]); +- cpmac_write(priv->regs, CPMAC_MAC_ADDR_HI, dev->dev_addr[0] | +- (dev->dev_addr[1] << 8) | (dev->dev_addr[2] << 16) | +- (dev->dev_addr[3] << 24)); ++ cpmac_write(priv->regs, CPMAC_MAC_ADDR_HI, be32_to_cpu(*(u32 *) ++ dev->dev_addr)); + cpmac_write(priv->regs, CPMAC_MAX_LENGTH, CPMAC_SKB_SIZE); + cpmac_write(priv->regs, CPMAC_UNICAST_CLEAR, 0xff); + cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 0xff); +@@ -1108,8 +1103,6 @@ static const struct net_device_ops cpmac + .ndo_set_mac_address = eth_mac_addr, + }; + +-static int external_switch; +- + static int __devinit cpmac_probe(struct platform_device *pdev) + { + int rc, phy_id; +@@ -1121,25 +1114,18 @@ static int __devinit cpmac_probe(struct + + pdata = pdev->dev.platform_data; + +- if (external_switch || dumb_switch) { +- strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE); /* fixed phys bus */ +- phy_id = pdev->id; +- } else { +- for (phy_id = 0; phy_id < PHY_MAX_ADDR; phy_id++) { +- if (!(pdata->phy_mask & (1 << phy_id))) +- continue; +- if (!cpmac_mii->phy_map[phy_id]) +- continue; +- strncpy(mdio_bus_id, cpmac_mii->id, MII_BUS_ID_SIZE); +- break; +- } ++ for (phy_id = 0; phy_id < PHY_MAX_ADDR; phy_id++) { ++ if (!(pdata->phy_mask & (1 << phy_id))) ++ continue; ++ if (!cpmac_mii->phy_map[phy_id]) ++ continue; ++ strncpy(mdio_bus_id, cpmac_mii->id, MII_BUS_ID_SIZE); ++ break; + } + + if (phy_id == PHY_MAX_ADDR) { +- dev_err(&pdev->dev, "no PHY present, falling back " +- "to switch on MDIO bus 0\n"); +- strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE); /* fixed phys bus */ +- phy_id = pdev->id; ++ printk(KERN_ERR "cpmac: No PHY present\n"); ++ return -ENXIO; + } + + dev = alloc_etherdev_mq(sizeof(*priv), CPMAC_QUEUES); +@@ -1228,6 +1214,7 @@ int __devinit cpmac_init(void) + { + u32 mask; + int i, res; ++ void __iomem *mii_reg; + + cpmac_mii = mdiobus_alloc(); + if (cpmac_mii == NULL) +@@ -1251,14 +1238,14 @@ int __devinit cpmac_init(void) + ar7_gpio_disable(26); + ar7_gpio_disable(27); + +- if (!ar7_is_titan()) { ++ if (ar7_is_titan()) { ++ ar7_device_reset(AR7_RESET_BIT_EPHY); ++ ar7_device_reset(TITAN_RESET_BIT_EPHY1); ++ } else { ++ ar7_device_reset(AR7_RESET_BIT_EPHY); + ar7_device_reset(AR7_RESET_BIT_CPMAC_LO); + ar7_device_reset(AR7_RESET_BIT_CPMAC_HI); + } +- ar7_device_reset(AR7_RESET_BIT_EPHY); +- +- if (ar7_is_titan()) +- ar7_device_reset(TITAN_RESET_BIT_EPHY1); + + cpmac_mii->reset(cpmac_mii); + +@@ -1270,10 +1257,22 @@ int __devinit cpmac_init(void) + msleep(10); + } + +- mask &= 0x7fffffff; ++ mask &= ar7_is_titan()? ~(0x80000000 | 0x40000000) : ~(0x80000000); + if (mask & (mask - 1)) { +- external_switch = 1; +- mask = 0; ++ if (!ar7_has_high_cpmac()) { ++ if (ar7_is_titan()) { ++ ar7_device_disable(AR7_RESET_BIT_EPHY); ++ ar7_device_disable(TITAN_RESET_BIT_EPHY1); ++ } else ++ ar7_device_disable(AR7_RESET_BIT_EPHY); ++ ++ //Titan remap might be different ++ mii_reg = ioremap(AR7_REGS_MII, 4); ++ if (mii_reg) { ++ writel(readl(mii_reg) | 1, mii_reg); ++ iounmap(mii_reg); ++ } ++ } + } + + if (ar7_is_titan()) diff --git a/target/linux/ar7/patches-3.3/973-cpmac_handle_mvswitch.patch b/target/linux/ar7/patches-3.3/973-cpmac_handle_mvswitch.patch new file mode 100644 index 0000000000..9c2ab5057b --- /dev/null +++ b/target/linux/ar7/patches-3.3/973-cpmac_handle_mvswitch.patch @@ -0,0 +1,70 @@ +--- a/drivers/net/ethernet/ti/cpmac.c ++++ b/drivers/net/ethernet/ti/cpmac.c +@@ -373,6 +373,7 @@ static struct sk_buff *cpmac_rx_one(stru + struct cpmac_desc *desc) + { + struct sk_buff *skb, *result = NULL; ++ int offset; + + if (unlikely(netif_msg_hw(priv))) + cpmac_dump_desc(priv->dev, desc); +@@ -384,10 +385,15 @@ static struct sk_buff *cpmac_rx_one(stru + return NULL; + } + +- skb = netdev_alloc_skb_ip_align(priv->dev, CPMAC_SKB_SIZE); ++ skb = netdev_alloc_skb(priv->dev, CPMAC_SKB_SIZE); + if (likely(skb)) { ++ offset = 2; ++ if (priv->phy) { ++ offset += priv->phy->pkt_align; ++ } ++ skb_reserve(skb, offset); ++ + skb_put(desc->skb, desc->datalen); +- desc->skb->protocol = eth_type_trans(desc->skb, priv->dev); + skb_checksum_none_assert(desc->skb); + priv->dev->stats.rx_packets++; + priv->dev->stats.rx_bytes += desc->datalen; +@@ -459,7 +465,12 @@ static int cpmac_poll(struct napi_struct + + skb = cpmac_rx_one(priv, desc); + if (likely(skb)) { +- netif_receive_skb(skb); ++ if (priv->phy->netif_receive_skb) { ++ priv->phy->netif_receive_skb(skb); ++ } else { ++ skb->protocol = eth_type_trans(skb, priv->dev); ++ netif_receive_skb(skb); ++ } + received++; + } + desc = desc->next; +@@ -952,7 +963,7 @@ static void cpmac_adjust_link(struct net + + static int cpmac_open(struct net_device *dev) + { +- int i, size, res; ++ int i, size, res, offset; + struct cpmac_priv *priv = netdev_priv(dev); + struct resource *mem; + struct cpmac_desc *desc; +@@ -991,11 +1002,17 @@ static int cpmac_open(struct net_device + + priv->rx_head = &priv->desc_ring[CPMAC_QUEUES]; + for (i = 0, desc = priv->rx_head; i < priv->ring_size; i++, desc++) { +- skb = netdev_alloc_skb_ip_align(dev, CPMAC_SKB_SIZE); ++ skb = netdev_alloc_skb(dev, CPMAC_SKB_SIZE); + if (unlikely(!skb)) { + res = -ENOMEM; + goto fail_desc; + } ++ offset = 2; ++ if (priv->phy) { ++ offset += priv->phy->pkt_align; ++ } ++ skb_reserve(skb, offset); ++ + desc->skb = skb; + desc->data_mapping = dma_map_single(&dev->dev, skb->data, + CPMAC_SKB_SIZE, |