+++ /dev/null
-From 305579c1f946ed1aa6c125252ace21c53d47c11d Mon Sep 17 00:00:00 2001
-From: Maxime Bizon <mbizon@freebox.fr>
-Date: Thu, 21 Jan 2010 17:50:54 +0100
-Subject: [PATCH 30/63] bcm63xx_enet: split dma registers access.
-
----
- arch/mips/bcm63xx/dev-enet.c | 23 +++-
- arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h | 4 +-
- drivers/net/ethernet/broadcom/bcm63xx_enet.c | 179 ++++++++++++++--------
- 3 files changed, 138 insertions(+), 68 deletions(-)
-
---- a/arch/mips/bcm63xx/dev-enet.c
-+++ b/arch/mips/bcm63xx/dev-enet.c
-@@ -19,6 +19,16 @@ static struct resource shared_res[] = {
- .end = -1, /* filled at runtime */
- .flags = IORESOURCE_MEM,
- },
-+ {
-+ .start = -1, /* filled at runtime */
-+ .end = -1, /* filled at runtime */
-+ .flags = IORESOURCE_MEM,
-+ },
-+ {
-+ .start = -1, /* filled at runtime */
-+ .end = -1, /* filled at runtime */
-+ .flags = IORESOURCE_MEM,
-+ },
- };
-
- static struct platform_device bcm63xx_enet_shared_device = {
-@@ -110,10 +120,15 @@ int __init bcm63xx_enet_register(int uni
- if (!shared_device_registered) {
- shared_res[0].start = bcm63xx_regset_address(RSET_ENETDMA);
- shared_res[0].end = shared_res[0].start;
-- if (BCMCPU_IS_6338())
-- shared_res[0].end += (RSET_ENETDMA_SIZE / 2) - 1;
-- else
-- shared_res[0].end += (RSET_ENETDMA_SIZE) - 1;
-+ shared_res[0].end += (RSET_ENETDMA_SIZE) - 1;
-+
-+ shared_res[1].start = bcm63xx_regset_address(RSET_ENETDMAC);
-+ shared_res[1].end = shared_res[1].start;
-+ shared_res[1].end += RSET_ENETDMAC_SIZE(16) - 1;
-+
-+ shared_res[2].start = bcm63xx_regset_address(RSET_ENETDMAS);
-+ shared_res[2].end = shared_res[2].start;
-+ shared_res[2].end += RSET_ENETDMAS_SIZE(16) - 1;
-
- ret = platform_device_register(&bcm63xx_enet_shared_device);
- if (ret)
---- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
-+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
-@@ -172,7 +172,9 @@ enum bcm63xx_regs_set {
- #define BCM_6358_RSET_SPI_SIZE 1804
- #define BCM_6368_RSET_SPI_SIZE 1804
- #define RSET_ENET_SIZE 2048
--#define RSET_ENETDMA_SIZE 2048
-+#define RSET_ENETDMA_SIZE 256
-+#define RSET_ENETDMAC_SIZE(chans) (16 * (chans))
-+#define RSET_ENETDMAS_SIZE(chans) (16 * (chans))
- #define RSET_ENETSW_SIZE 65536
- #define RSET_UART_SIZE 24
- #define RSET_HSSPI_SIZE 1536
---- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
-+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
-@@ -41,8 +41,8 @@ static int copybreak __read_mostly = 128
- module_param(copybreak, int, 0);
- MODULE_PARM_DESC(copybreak, "Receive copy threshold");
-
--/* io memory shared between all devices */
--static void __iomem *bcm_enet_shared_base;
-+/* io registers memory shared between all devices */
-+static void __iomem *bcm_enet_shared_base[3];
-
- /*
- * io helpers to access mac registers
-@@ -63,13 +63,35 @@ static inline void enet_writel(struct bc
- */
- static inline u32 enet_dma_readl(struct bcm_enet_priv *priv, u32 off)
- {
-- return bcm_readl(bcm_enet_shared_base + off);
-+ return bcm_readl(bcm_enet_shared_base[0] + off);
- }
-
- static inline void enet_dma_writel(struct bcm_enet_priv *priv,
- u32 val, u32 off)
- {
-- bcm_writel(val, bcm_enet_shared_base + off);
-+ bcm_writel(val, bcm_enet_shared_base[0] + off);
-+}
-+
-+static inline u32 enet_dmac_readl(struct bcm_enet_priv *priv, u32 off)
-+{
-+ return bcm_readl(bcm_enet_shared_base[1] + off);
-+}
-+
-+static inline void enet_dmac_writel(struct bcm_enet_priv *priv,
-+ u32 val, u32 off)
-+{
-+ bcm_writel(val, bcm_enet_shared_base[1] + off);
-+}
-+
-+static inline u32 enet_dmas_readl(struct bcm_enet_priv *priv, u32 off)
-+{
-+ return bcm_readl(bcm_enet_shared_base[2] + off);
-+}
-+
-+static inline void enet_dmas_writel(struct bcm_enet_priv *priv,
-+ u32 val, u32 off)
-+{
-+ bcm_writel(val, bcm_enet_shared_base[2] + off);
- }
-
- /*
-@@ -353,8 +375,8 @@ static int bcm_enet_receive_queue(struct
- bcm_enet_refill_rx(dev);
-
- /* kick rx dma */
-- enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
-- ENETDMA_CHANCFG_REG(priv->rx_chan));
-+ enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
-+ ENETDMAC_CHANCFG_REG(priv->rx_chan));
- }
-
- return processed;
-@@ -429,10 +451,10 @@ static int bcm_enet_poll(struct napi_str
- dev = priv->net_dev;
-
- /* ack interrupts */
-- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
-- ENETDMA_IR_REG(priv->rx_chan));
-- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
-- ENETDMA_IR_REG(priv->tx_chan));
-+ enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
-+ ENETDMAC_IR_REG(priv->rx_chan));
-+ enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
-+ ENETDMAC_IR_REG(priv->tx_chan));
-
- /* reclaim sent skb */
- tx_work_done = bcm_enet_tx_reclaim(dev, 0);
-@@ -451,10 +473,10 @@ static int bcm_enet_poll(struct napi_str
- napi_complete(napi);
-
- /* restore rx/tx interrupt */
-- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
-- ENETDMA_IRMASK_REG(priv->rx_chan));
-- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
-- ENETDMA_IRMASK_REG(priv->tx_chan));
-+ enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
-+ ENETDMAC_IRMASK_REG(priv->rx_chan));
-+ enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
-+ ENETDMAC_IRMASK_REG(priv->tx_chan));
-
- return rx_work_done;
- }
-@@ -497,8 +519,8 @@ static irqreturn_t bcm_enet_isr_dma(int
- priv = netdev_priv(dev);
-
- /* mask rx/tx interrupts */
-- enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
-- enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
-+ enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->rx_chan));
-+ enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->tx_chan));
-
- napi_schedule(&priv->napi);
-
-@@ -557,8 +579,8 @@ static int bcm_enet_start_xmit(struct sk
- wmb();
-
- /* kick tx dma */
-- enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
-- ENETDMA_CHANCFG_REG(priv->tx_chan));
-+ enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
-+ ENETDMAC_CHANCFG_REG(priv->tx_chan));
-
- /* stop queue if no more desc available */
- if (!priv->tx_desc_count)
-@@ -801,8 +823,8 @@ static int bcm_enet_open(struct net_devi
-
- /* mask all interrupts and request them */
- enet_writel(priv, 0, ENET_IRMASK_REG);
-- enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
-- enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
-+ enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->rx_chan));
-+ enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->tx_chan));
-
- ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
- if (ret)
-@@ -891,28 +913,28 @@ static int bcm_enet_open(struct net_devi
- }
-
- /* write rx & tx ring addresses */
-- enet_dma_writel(priv, priv->rx_desc_dma,
-- ENETDMA_RSTART_REG(priv->rx_chan));
-- enet_dma_writel(priv, priv->tx_desc_dma,
-- ENETDMA_RSTART_REG(priv->tx_chan));
-+ enet_dmas_writel(priv, priv->rx_desc_dma,
-+ ENETDMAS_RSTART_REG(priv->rx_chan));
-+ enet_dmas_writel(priv, priv->tx_desc_dma,
-+ ENETDMAS_RSTART_REG(priv->tx_chan));
-
- /* clear remaining state ram for rx & tx channel */
-- enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->rx_chan));
-- enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->tx_chan));
-- enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->rx_chan));
-- enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->tx_chan));
-- enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->rx_chan));
-- enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->tx_chan));
-+ enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG(priv->rx_chan));
-+ enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG(priv->tx_chan));
-+ enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG(priv->rx_chan));
-+ enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG(priv->tx_chan));
-+ enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG(priv->rx_chan));
-+ enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG(priv->tx_chan));
-
- /* set max rx/tx length */
- enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
- enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
-
- /* set dma maximum burst len */
-- enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
-- ENETDMA_MAXBURST_REG(priv->rx_chan));
-- enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
-- ENETDMA_MAXBURST_REG(priv->tx_chan));
-+ enet_dmac_writel(priv, BCMENET_DMA_MAXBURST,
-+ ENETDMAC_MAXBURST_REG(priv->rx_chan));
-+ enet_dmac_writel(priv, BCMENET_DMA_MAXBURST,
-+ ENETDMAC_MAXBURST_REG(priv->tx_chan));
-
- /* set correct transmit fifo watermark */
- enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
-@@ -930,26 +952,26 @@ static int bcm_enet_open(struct net_devi
- val |= ENET_CTL_ENABLE_MASK;
- enet_writel(priv, val, ENET_CTL_REG);
- enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
-- enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
-- ENETDMA_CHANCFG_REG(priv->rx_chan));
-+ enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
-+ ENETDMAC_CHANCFG_REG(priv->rx_chan));
-
- /* watch "mib counters about to overflow" interrupt */
- enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
- enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
-
- /* watch "packet transferred" interrupt in rx and tx */
-- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
-- ENETDMA_IR_REG(priv->rx_chan));
-- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
-- ENETDMA_IR_REG(priv->tx_chan));
-+ enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
-+ ENETDMAC_IR_REG(priv->rx_chan));
-+ enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
-+ ENETDMAC_IR_REG(priv->tx_chan));
-
- /* make sure we enable napi before rx interrupt */
- napi_enable(&priv->napi);
-
-- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
-- ENETDMA_IRMASK_REG(priv->rx_chan));
-- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
-- ENETDMA_IRMASK_REG(priv->tx_chan));
-+ enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
-+ ENETDMAC_IRMASK_REG(priv->rx_chan));
-+ enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
-+ ENETDMAC_IRMASK_REG(priv->tx_chan));
-
- if (priv->has_phy)
- phy_start(priv->phydev);
-@@ -1026,14 +1048,14 @@ static void bcm_enet_disable_dma(struct
- {
- int limit;
-
-- enet_dma_writel(priv, 0, ENETDMA_CHANCFG_REG(chan));
-+ enet_dmac_writel(priv, 0, ENETDMAC_CHANCFG_REG(chan));
-
- limit = 1000;
- do {
- u32 val;
-
-- val = enet_dma_readl(priv, ENETDMA_CHANCFG_REG(chan));
-- if (!(val & ENETDMA_CHANCFG_EN_MASK))
-+ val = enet_dmac_readl(priv, ENETDMAC_CHANCFG_REG(chan));
-+ if (!(val & ENETDMAC_CHANCFG_EN_MASK))
- break;
- udelay(1);
- } while (limit--);
-@@ -1059,8 +1081,8 @@ static int bcm_enet_stop(struct net_devi
-
- /* mask all interrupts */
- enet_writel(priv, 0, ENET_IRMASK_REG);
-- enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
-- enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
-+ enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->rx_chan));
-+ enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->tx_chan));
-
- /* make sure no mib update is scheduled */
- cancel_work_sync(&priv->mib_update_task);
-@@ -1598,7 +1620,7 @@ static int __devinit bcm_enet_probe(stru
-
- /* stop if shared driver failed, assume driver->probe will be
- * called in the same order we register devices (correct ?) */
-- if (!bcm_enet_shared_base)
-+ if (!bcm_enet_shared_base[0])
- return -ENODEV;
-
- res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-@@ -1904,30 +1926,61 @@ struct platform_driver bcm63xx_enet_driv
- static int __devinit bcm_enet_shared_probe(struct platform_device *pdev)
- {
- struct resource *res;
-+ int ret, i, requested[3];
-
-- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-- if (!res)
-- return -ENODEV;
-+ memset(bcm_enet_shared_base, 0, sizeof (bcm_enet_shared_base));
-+ memset(requested, 0, sizeof (requested));
-
-- if (!request_mem_region(res->start, resource_size(res),
-- "bcm63xx_enet_dma"))
-- return -EBUSY;
-+ for (i = 0; i < 3; i++) {
-+ void __iomem *p;
-
-- bcm_enet_shared_base = ioremap(res->start, resource_size(res));
-- if (!bcm_enet_shared_base) {
-- release_mem_region(res->start, resource_size(res));
-- return -ENOMEM;
-+ res = platform_get_resource(pdev, IORESOURCE_MEM, i);
-+ if (!res) {
-+ ret = -EINVAL;
-+ goto fail;
-+ }
-+
-+ if (!request_mem_region(res->start, resource_size(res),
-+ "bcm63xx_enet_dma")) {
-+ ret = -EBUSY;
-+ goto fail;
-+ }
-+ requested[i] = 0;
-+
-+ p = ioremap(res->start, resource_size(res));
-+ if (!p) {
-+ ret = -ENOMEM;
-+ goto fail;
-+ }
-+
-+ bcm_enet_shared_base[i] = p;
- }
-+
- return 0;
-+
-+fail:
-+ for (i = 0; i < 3; i++) {
-+ res = platform_get_resource(pdev, IORESOURCE_MEM, i);
-+ if (!res)
-+ continue;
-+ if (bcm_enet_shared_base[i])
-+ iounmap(bcm_enet_shared_base[i]);
-+ if (requested[i])
-+ release_mem_region(res->start, resource_size(res));
-+ }
-+ return ret;
- }
-
- static int __devexit bcm_enet_shared_remove(struct platform_device *pdev)
- {
- struct resource *res;
-+ int i;
-
-- iounmap(bcm_enet_shared_base);
-- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-- release_mem_region(res->start, resource_size(res));
-+ for (i = 0; i < 3; i++) {
-+ iounmap(bcm_enet_shared_base[i]);
-+ res = platform_get_resource(pdev, IORESOURCE_MEM, i);
-+ release_mem_region(res->start, resource_size(res));
-+ }
- return 0;
- }
-
projects / openwrt / svn-archive / archive.git / blobdiff