diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/net/macb.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/net/macb.c | 702 |
1 files changed, 0 insertions, 702 deletions
diff --git a/qemu/roms/u-boot/drivers/net/macb.c b/qemu/roms/u-boot/drivers/net/macb.c deleted file mode 100644 index 781a272cf..000000000 --- a/qemu/roms/u-boot/drivers/net/macb.c +++ /dev/null @@ -1,702 +0,0 @@ -/* - * Copyright (C) 2005-2006 Atmel Corporation - * - * SPDX-License-Identifier: GPL-2.0+ - */ -#include <common.h> - -/* - * The u-boot networking stack is a little weird. It seems like the - * networking core allocates receive buffers up front without any - * regard to the hardware that's supposed to actually receive those - * packets. - * - * The MACB receives packets into 128-byte receive buffers, so the - * buffers allocated by the core isn't very practical to use. We'll - * allocate our own, but we need one such buffer in case a packet - * wraps around the DMA ring so that we have to copy it. - * - * Therefore, define CONFIG_SYS_RX_ETH_BUFFER to 1 in the board-specific - * configuration header. This way, the core allocates one RX buffer - * and one TX buffer, each of which can hold a ethernet packet of - * maximum size. - * - * For some reason, the networking core unconditionally specifies a - * 32-byte packet "alignment" (which really should be called - * "padding"). MACB shouldn't need that, but we'll refrain from any - * core modifications here... - */ - -#include <net.h> -#include <netdev.h> -#include <malloc.h> -#include <miiphy.h> - -#include <linux/mii.h> -#include <asm/io.h> -#include <asm/dma-mapping.h> -#include <asm/arch/clk.h> -#include <asm-generic/errno.h> - -#include "macb.h" - -#define CONFIG_SYS_MACB_RX_BUFFER_SIZE 4096 -#define CONFIG_SYS_MACB_RX_RING_SIZE (CONFIG_SYS_MACB_RX_BUFFER_SIZE / 128) -#define CONFIG_SYS_MACB_TX_RING_SIZE 16 -#define CONFIG_SYS_MACB_TX_TIMEOUT 1000 -#define CONFIG_SYS_MACB_AUTONEG_TIMEOUT 5000000 - -struct macb_dma_desc { - u32 addr; - u32 ctrl; -}; - -#define RXADDR_USED 0x00000001 -#define RXADDR_WRAP 0x00000002 - -#define RXBUF_FRMLEN_MASK 0x00000fff -#define RXBUF_FRAME_START 0x00004000 -#define RXBUF_FRAME_END 0x00008000 -#define RXBUF_TYPEID_MATCH 0x00400000 -#define RXBUF_ADDR4_MATCH 0x00800000 -#define RXBUF_ADDR3_MATCH 0x01000000 -#define RXBUF_ADDR2_MATCH 0x02000000 -#define RXBUF_ADDR1_MATCH 0x04000000 -#define RXBUF_BROADCAST 0x80000000 - -#define TXBUF_FRMLEN_MASK 0x000007ff -#define TXBUF_FRAME_END 0x00008000 -#define TXBUF_NOCRC 0x00010000 -#define TXBUF_EXHAUSTED 0x08000000 -#define TXBUF_UNDERRUN 0x10000000 -#define TXBUF_MAXRETRY 0x20000000 -#define TXBUF_WRAP 0x40000000 -#define TXBUF_USED 0x80000000 - -struct macb_device { - void *regs; - - unsigned int rx_tail; - unsigned int tx_head; - unsigned int tx_tail; - - void *rx_buffer; - void *tx_buffer; - struct macb_dma_desc *rx_ring; - struct macb_dma_desc *tx_ring; - - unsigned long rx_buffer_dma; - unsigned long rx_ring_dma; - unsigned long tx_ring_dma; - - const struct device *dev; - struct eth_device netdev; - unsigned short phy_addr; - struct mii_dev *bus; -}; -#define to_macb(_nd) container_of(_nd, struct macb_device, netdev) - -static int macb_is_gem(struct macb_device *macb) -{ - return MACB_BFEXT(IDNUM, macb_readl(macb, MID)) == 0x2; -} - -static void macb_mdio_write(struct macb_device *macb, u8 reg, u16 value) -{ - unsigned long netctl; - unsigned long netstat; - unsigned long frame; - - netctl = macb_readl(macb, NCR); - netctl |= MACB_BIT(MPE); - macb_writel(macb, NCR, netctl); - - frame = (MACB_BF(SOF, 1) - | MACB_BF(RW, 1) - | MACB_BF(PHYA, macb->phy_addr) - | MACB_BF(REGA, reg) - | MACB_BF(CODE, 2) - | MACB_BF(DATA, value)); - macb_writel(macb, MAN, frame); - - do { - netstat = macb_readl(macb, NSR); - } while (!(netstat & MACB_BIT(IDLE))); - - netctl = macb_readl(macb, NCR); - netctl &= ~MACB_BIT(MPE); - macb_writel(macb, NCR, netctl); -} - -static u16 macb_mdio_read(struct macb_device *macb, u8 reg) -{ - unsigned long netctl; - unsigned long netstat; - unsigned long frame; - - netctl = macb_readl(macb, NCR); - netctl |= MACB_BIT(MPE); - macb_writel(macb, NCR, netctl); - - frame = (MACB_BF(SOF, 1) - | MACB_BF(RW, 2) - | MACB_BF(PHYA, macb->phy_addr) - | MACB_BF(REGA, reg) - | MACB_BF(CODE, 2)); - macb_writel(macb, MAN, frame); - - do { - netstat = macb_readl(macb, NSR); - } while (!(netstat & MACB_BIT(IDLE))); - - frame = macb_readl(macb, MAN); - - netctl = macb_readl(macb, NCR); - netctl &= ~MACB_BIT(MPE); - macb_writel(macb, NCR, netctl); - - return MACB_BFEXT(DATA, frame); -} - -void __weak arch_get_mdio_control(const char *name) -{ - return; -} - -#if defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB) - -int macb_miiphy_read(const char *devname, u8 phy_adr, u8 reg, u16 *value) -{ - struct eth_device *dev = eth_get_dev_by_name(devname); - struct macb_device *macb = to_macb(dev); - - if ( macb->phy_addr != phy_adr ) - return -1; - - arch_get_mdio_control(devname); - *value = macb_mdio_read(macb, reg); - - return 0; -} - -int macb_miiphy_write(const char *devname, u8 phy_adr, u8 reg, u16 value) -{ - struct eth_device *dev = eth_get_dev_by_name(devname); - struct macb_device *macb = to_macb(dev); - - if ( macb->phy_addr != phy_adr ) - return -1; - - arch_get_mdio_control(devname); - macb_mdio_write(macb, reg, value); - - return 0; -} -#endif - - -#if defined(CONFIG_CMD_NET) - -static int macb_send(struct eth_device *netdev, void *packet, int length) -{ - struct macb_device *macb = to_macb(netdev); - unsigned long paddr, ctrl; - unsigned int tx_head = macb->tx_head; - int i; - - paddr = dma_map_single(packet, length, DMA_TO_DEVICE); - - ctrl = length & TXBUF_FRMLEN_MASK; - ctrl |= TXBUF_FRAME_END; - if (tx_head == (CONFIG_SYS_MACB_TX_RING_SIZE - 1)) { - ctrl |= TXBUF_WRAP; - macb->tx_head = 0; - } else - macb->tx_head++; - - macb->tx_ring[tx_head].ctrl = ctrl; - macb->tx_ring[tx_head].addr = paddr; - barrier(); - macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE) | MACB_BIT(TSTART)); - - /* - * I guess this is necessary because the networking core may - * re-use the transmit buffer as soon as we return... - */ - for (i = 0; i <= CONFIG_SYS_MACB_TX_TIMEOUT; i++) { - barrier(); - ctrl = macb->tx_ring[tx_head].ctrl; - if (ctrl & TXBUF_USED) - break; - udelay(1); - } - - dma_unmap_single(packet, length, paddr); - - if (i <= CONFIG_SYS_MACB_TX_TIMEOUT) { - if (ctrl & TXBUF_UNDERRUN) - printf("%s: TX underrun\n", netdev->name); - if (ctrl & TXBUF_EXHAUSTED) - printf("%s: TX buffers exhausted in mid frame\n", - netdev->name); - } else { - printf("%s: TX timeout\n", netdev->name); - } - - /* No one cares anyway */ - return 0; -} - -static void reclaim_rx_buffers(struct macb_device *macb, - unsigned int new_tail) -{ - unsigned int i; - - i = macb->rx_tail; - while (i > new_tail) { - macb->rx_ring[i].addr &= ~RXADDR_USED; - i++; - if (i > CONFIG_SYS_MACB_RX_RING_SIZE) - i = 0; - } - - while (i < new_tail) { - macb->rx_ring[i].addr &= ~RXADDR_USED; - i++; - } - - barrier(); - macb->rx_tail = new_tail; -} - -static int macb_recv(struct eth_device *netdev) -{ - struct macb_device *macb = to_macb(netdev); - unsigned int rx_tail = macb->rx_tail; - void *buffer; - int length; - int wrapped = 0; - u32 status; - - for (;;) { - if (!(macb->rx_ring[rx_tail].addr & RXADDR_USED)) - return -1; - - status = macb->rx_ring[rx_tail].ctrl; - if (status & RXBUF_FRAME_START) { - if (rx_tail != macb->rx_tail) - reclaim_rx_buffers(macb, rx_tail); - wrapped = 0; - } - - if (status & RXBUF_FRAME_END) { - buffer = macb->rx_buffer + 128 * macb->rx_tail; - length = status & RXBUF_FRMLEN_MASK; - if (wrapped) { - unsigned int headlen, taillen; - - headlen = 128 * (CONFIG_SYS_MACB_RX_RING_SIZE - - macb->rx_tail); - taillen = length - headlen; - memcpy((void *)NetRxPackets[0], - buffer, headlen); - memcpy((void *)NetRxPackets[0] + headlen, - macb->rx_buffer, taillen); - buffer = (void *)NetRxPackets[0]; - } - - NetReceive(buffer, length); - if (++rx_tail >= CONFIG_SYS_MACB_RX_RING_SIZE) - rx_tail = 0; - reclaim_rx_buffers(macb, rx_tail); - } else { - if (++rx_tail >= CONFIG_SYS_MACB_RX_RING_SIZE) { - wrapped = 1; - rx_tail = 0; - } - } - barrier(); - } - - return 0; -} - -static void macb_phy_reset(struct macb_device *macb) -{ - struct eth_device *netdev = &macb->netdev; - int i; - u16 status, adv; - - adv = ADVERTISE_CSMA | ADVERTISE_ALL; - macb_mdio_write(macb, MII_ADVERTISE, adv); - printf("%s: Starting autonegotiation...\n", netdev->name); - macb_mdio_write(macb, MII_BMCR, (BMCR_ANENABLE - | BMCR_ANRESTART)); - - for (i = 0; i < CONFIG_SYS_MACB_AUTONEG_TIMEOUT / 100; i++) { - status = macb_mdio_read(macb, MII_BMSR); - if (status & BMSR_ANEGCOMPLETE) - break; - udelay(100); - } - - if (status & BMSR_ANEGCOMPLETE) - printf("%s: Autonegotiation complete\n", netdev->name); - else - printf("%s: Autonegotiation timed out (status=0x%04x)\n", - netdev->name, status); -} - -#ifdef CONFIG_MACB_SEARCH_PHY -static int macb_phy_find(struct macb_device *macb) -{ - int i; - u16 phy_id; - - /* Search for PHY... */ - for (i = 0; i < 32; i++) { - macb->phy_addr = i; - phy_id = macb_mdio_read(macb, MII_PHYSID1); - if (phy_id != 0xffff) { - printf("%s: PHY present at %d\n", macb->netdev.name, i); - return 1; - } - } - - /* PHY isn't up to snuff */ - printf("%s: PHY not found\n", macb->netdev.name); - - return 0; -} -#endif /* CONFIG_MACB_SEARCH_PHY */ - - -static int macb_phy_init(struct macb_device *macb) -{ - struct eth_device *netdev = &macb->netdev; -#ifdef CONFIG_PHYLIB - struct phy_device *phydev; -#endif - u32 ncfgr; - u16 phy_id, status, adv, lpa; - int media, speed, duplex; - int i; - - arch_get_mdio_control(netdev->name); -#ifdef CONFIG_MACB_SEARCH_PHY - /* Auto-detect phy_addr */ - if (!macb_phy_find(macb)) { - return 0; - } -#endif /* CONFIG_MACB_SEARCH_PHY */ - - /* Check if the PHY is up to snuff... */ - phy_id = macb_mdio_read(macb, MII_PHYSID1); - if (phy_id == 0xffff) { - printf("%s: No PHY present\n", netdev->name); - return 0; - } - -#ifdef CONFIG_PHYLIB - /* need to consider other phy interface mode */ - phydev = phy_connect(macb->bus, macb->phy_addr, netdev, - PHY_INTERFACE_MODE_RGMII); - if (!phydev) { - printf("phy_connect failed\n"); - return -ENODEV; - } - - phy_config(phydev); -#endif - - status = macb_mdio_read(macb, MII_BMSR); - if (!(status & BMSR_LSTATUS)) { - /* Try to re-negotiate if we don't have link already. */ - macb_phy_reset(macb); - - for (i = 0; i < CONFIG_SYS_MACB_AUTONEG_TIMEOUT / 100; i++) { - status = macb_mdio_read(macb, MII_BMSR); - if (status & BMSR_LSTATUS) - break; - udelay(100); - } - } - - if (!(status & BMSR_LSTATUS)) { - printf("%s: link down (status: 0x%04x)\n", - netdev->name, status); - return 0; - } - - /* First check for GMAC */ - if (macb_is_gem(macb)) { - lpa = macb_mdio_read(macb, MII_STAT1000); - if (lpa & (1 << 11)) { - speed = 1000; - duplex = 1; - } else { - if (lpa & (1 << 10)) { - speed = 1000; - duplex = 1; - } else { - speed = 0; - } - } - - if (speed == 1000) { - printf("%s: link up, %dMbps %s-duplex (lpa: 0x%04x)\n", - netdev->name, - speed, - duplex ? "full" : "half", - lpa); - - ncfgr = macb_readl(macb, NCFGR); - ncfgr &= ~(GEM_BIT(GBE) | MACB_BIT(SPD) | MACB_BIT(FD)); - if (speed) - ncfgr |= GEM_BIT(GBE); - if (duplex) - ncfgr |= MACB_BIT(FD); - macb_writel(macb, NCFGR, ncfgr); - - return 1; - } - } - - /* fall back for EMAC checking */ - adv = macb_mdio_read(macb, MII_ADVERTISE); - lpa = macb_mdio_read(macb, MII_LPA); - media = mii_nway_result(lpa & adv); - speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF) - ? 1 : 0); - duplex = (media & ADVERTISE_FULL) ? 1 : 0; - printf("%s: link up, %sMbps %s-duplex (lpa: 0x%04x)\n", - netdev->name, - speed ? "100" : "10", - duplex ? "full" : "half", - lpa); - - ncfgr = macb_readl(macb, NCFGR); - ncfgr &= ~(MACB_BIT(SPD) | MACB_BIT(FD)); - if (speed) - ncfgr |= MACB_BIT(SPD); - if (duplex) - ncfgr |= MACB_BIT(FD); - macb_writel(macb, NCFGR, ncfgr); - - return 1; -} - -static int macb_init(struct eth_device *netdev, bd_t *bd) -{ - struct macb_device *macb = to_macb(netdev); - unsigned long paddr; - int i; - - /* - * macb_halt should have been called at some point before now, - * so we'll assume the controller is idle. - */ - - /* initialize DMA descriptors */ - paddr = macb->rx_buffer_dma; - for (i = 0; i < CONFIG_SYS_MACB_RX_RING_SIZE; i++) { - if (i == (CONFIG_SYS_MACB_RX_RING_SIZE - 1)) - paddr |= RXADDR_WRAP; - macb->rx_ring[i].addr = paddr; - macb->rx_ring[i].ctrl = 0; - paddr += 128; - } - for (i = 0; i < CONFIG_SYS_MACB_TX_RING_SIZE; i++) { - macb->tx_ring[i].addr = 0; - if (i == (CONFIG_SYS_MACB_TX_RING_SIZE - 1)) - macb->tx_ring[i].ctrl = TXBUF_USED | TXBUF_WRAP; - else - macb->tx_ring[i].ctrl = TXBUF_USED; - } - macb->rx_tail = macb->tx_head = macb->tx_tail = 0; - - macb_writel(macb, RBQP, macb->rx_ring_dma); - macb_writel(macb, TBQP, macb->tx_ring_dma); - - if (macb_is_gem(macb)) { -#ifdef CONFIG_RGMII - gem_writel(macb, UR, GEM_BIT(RGMII)); -#else - gem_writel(macb, UR, 0); -#endif - } else { - /* choose RMII or MII mode. This depends on the board */ -#ifdef CONFIG_RMII -#ifdef CONFIG_AT91FAMILY - macb_writel(macb, USRIO, MACB_BIT(RMII) | MACB_BIT(CLKEN)); -#else - macb_writel(macb, USRIO, 0); -#endif -#else -#ifdef CONFIG_AT91FAMILY - macb_writel(macb, USRIO, MACB_BIT(CLKEN)); -#else - macb_writel(macb, USRIO, MACB_BIT(MII)); -#endif -#endif /* CONFIG_RMII */ - } - - if (!macb_phy_init(macb)) - return -1; - - /* Enable TX and RX */ - macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE)); - - return 0; -} - -static void macb_halt(struct eth_device *netdev) -{ - struct macb_device *macb = to_macb(netdev); - u32 ncr, tsr; - - /* Halt the controller and wait for any ongoing transmission to end. */ - ncr = macb_readl(macb, NCR); - ncr |= MACB_BIT(THALT); - macb_writel(macb, NCR, ncr); - - do { - tsr = macb_readl(macb, TSR); - } while (tsr & MACB_BIT(TGO)); - - /* Disable TX and RX, and clear statistics */ - macb_writel(macb, NCR, MACB_BIT(CLRSTAT)); -} - -static int macb_write_hwaddr(struct eth_device *dev) -{ - struct macb_device *macb = to_macb(dev); - u32 hwaddr_bottom; - u16 hwaddr_top; - - /* set hardware address */ - hwaddr_bottom = dev->enetaddr[0] | dev->enetaddr[1] << 8 | - dev->enetaddr[2] << 16 | dev->enetaddr[3] << 24; - macb_writel(macb, SA1B, hwaddr_bottom); - hwaddr_top = dev->enetaddr[4] | dev->enetaddr[5] << 8; - macb_writel(macb, SA1T, hwaddr_top); - return 0; -} - -static u32 macb_mdc_clk_div(int id, struct macb_device *macb) -{ - u32 config; - unsigned long macb_hz = get_macb_pclk_rate(id); - - if (macb_hz < 20000000) - config = MACB_BF(CLK, MACB_CLK_DIV8); - else if (macb_hz < 40000000) - config = MACB_BF(CLK, MACB_CLK_DIV16); - else if (macb_hz < 80000000) - config = MACB_BF(CLK, MACB_CLK_DIV32); - else - config = MACB_BF(CLK, MACB_CLK_DIV64); - - return config; -} - -static u32 gem_mdc_clk_div(int id, struct macb_device *macb) -{ - u32 config; - unsigned long macb_hz = get_macb_pclk_rate(id); - - if (macb_hz < 20000000) - config = GEM_BF(CLK, GEM_CLK_DIV8); - else if (macb_hz < 40000000) - config = GEM_BF(CLK, GEM_CLK_DIV16); - else if (macb_hz < 80000000) - config = GEM_BF(CLK, GEM_CLK_DIV32); - else if (macb_hz < 120000000) - config = GEM_BF(CLK, GEM_CLK_DIV48); - else if (macb_hz < 160000000) - config = GEM_BF(CLK, GEM_CLK_DIV64); - else - config = GEM_BF(CLK, GEM_CLK_DIV96); - - return config; -} - -/* - * Get the DMA bus width field of the network configuration register that we - * should program. We find the width from decoding the design configuration - * register to find the maximum supported data bus width. - */ -static u32 macb_dbw(struct macb_device *macb) -{ - switch (GEM_BFEXT(DBWDEF, gem_readl(macb, DCFG1))) { - case 4: - return GEM_BF(DBW, GEM_DBW128); - case 2: - return GEM_BF(DBW, GEM_DBW64); - case 1: - default: - return GEM_BF(DBW, GEM_DBW32); - } -} - -int macb_eth_initialize(int id, void *regs, unsigned int phy_addr) -{ - struct macb_device *macb; - struct eth_device *netdev; - u32 ncfgr; - - macb = malloc(sizeof(struct macb_device)); - if (!macb) { - printf("Error: Failed to allocate memory for MACB%d\n", id); - return -1; - } - memset(macb, 0, sizeof(struct macb_device)); - - netdev = &macb->netdev; - - macb->rx_buffer = dma_alloc_coherent(CONFIG_SYS_MACB_RX_BUFFER_SIZE, - &macb->rx_buffer_dma); - macb->rx_ring = dma_alloc_coherent(CONFIG_SYS_MACB_RX_RING_SIZE - * sizeof(struct macb_dma_desc), - &macb->rx_ring_dma); - macb->tx_ring = dma_alloc_coherent(CONFIG_SYS_MACB_TX_RING_SIZE - * sizeof(struct macb_dma_desc), - &macb->tx_ring_dma); - - macb->regs = regs; - macb->phy_addr = phy_addr; - - if (macb_is_gem(macb)) - sprintf(netdev->name, "gmac%d", id); - else - sprintf(netdev->name, "macb%d", id); - - netdev->init = macb_init; - netdev->halt = macb_halt; - netdev->send = macb_send; - netdev->recv = macb_recv; - netdev->write_hwaddr = macb_write_hwaddr; - - /* - * Do some basic initialization so that we at least can talk - * to the PHY - */ - if (macb_is_gem(macb)) { - ncfgr = gem_mdc_clk_div(id, macb); - ncfgr |= macb_dbw(macb); - } else { - ncfgr = macb_mdc_clk_div(id, macb); - } - - macb_writel(macb, NCFGR, ncfgr); - - eth_register(netdev); - -#if defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB) - miiphy_register(netdev->name, macb_miiphy_read, macb_miiphy_write); - macb->bus = miiphy_get_dev_by_name(netdev->name); -#endif - return 0; -} - -#endif |