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authorLennert Buytenhek <buytenh@wantstofly.org>2008-04-24 01:27:17 +0200
committerDale Farnsworth <dale@farnsworth.org>2008-04-28 21:17:07 -0700
commitf2ce825d2a89b30af14fa577298fecaab7bc9504 (patch)
treebc49974ec503b653c792d879ceabc42a934b8b22
parentfa3959f457109cc7d082b86ea6daae927982815b (diff)
downloadop-kernel-dev-f2ce825d2a89b30af14fa577298fecaab7bc9504.zip
op-kernel-dev-f2ce825d2a89b30af14fa577298fecaab7bc9504.tar.gz
mv643xx_eth: mbus decode window support
Make it possible to pass mbus_dram_target_info to the mv643xx_eth driver via the platform data, and make the mv643xx_eth driver program the window registers based on this data if it is passed in. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Reviewed-by: Tzachi Perelstein <tzachi@marvell.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
-rw-r--r--drivers/net/mv643xx_eth.c51
-rw-r--r--include/linux/mv643xx_eth.h6
2 files changed, 57 insertions, 0 deletions
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index eebf0d2..aabf1c6 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -91,6 +91,11 @@
*/
#define PHY_ADDR_REG 0x0000
#define SMI_REG 0x0004
+#define WINDOW_BASE(i) (0x0200 + ((i) << 3))
+#define WINDOW_SIZE(i) (0x0204 + ((i) << 3))
+#define WINDOW_REMAP_HIGH(i) (0x0280 + ((i) << 2))
+#define WINDOW_BAR_ENABLE 0x0290
+#define WINDOW_PROTECT(i) (0x0294 + ((i) << 4))
/*
* Per-port registers.
@@ -512,6 +517,8 @@ struct mv643xx_shared_private {
/* used to protect SMI_REG, which is shared across ports */
spinlock_t phy_lock;
+
+ u32 win_protect;
};
struct mv643xx_private {
@@ -1888,6 +1895,9 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
mp->shared = platform_get_drvdata(pd->shared);
port_num = mp->port_num = pd->port_number;
+ if (mp->shared->win_protect)
+ wrl(mp, WINDOW_PROTECT(port_num), mp->shared->win_protect);
+
/* set default config values */
eth_port_uc_addr_get(mp, dev->dev_addr);
mp->rx_ring_size = PORT_DEFAULT_RECEIVE_QUEUE_SIZE;
@@ -1992,9 +2002,44 @@ static int mv643xx_eth_remove(struct platform_device *pdev)
return 0;
}
+static void mv643xx_eth_conf_mbus_windows(struct mv643xx_shared_private *msp,
+ struct mbus_dram_target_info *dram)
+{
+ void __iomem *base = msp->eth_base;
+ u32 win_enable;
+ u32 win_protect;
+ int i;
+
+ for (i = 0; i < 6; i++) {
+ writel(0, base + WINDOW_BASE(i));
+ writel(0, base + WINDOW_SIZE(i));
+ if (i < 4)
+ writel(0, base + WINDOW_REMAP_HIGH(i));
+ }
+
+ win_enable = 0x3f;
+ win_protect = 0;
+
+ for (i = 0; i < dram->num_cs; i++) {
+ struct mbus_dram_window *cs = dram->cs + i;
+
+ writel((cs->base & 0xffff0000) |
+ (cs->mbus_attr << 8) |
+ dram->mbus_dram_target_id, base + WINDOW_BASE(i));
+ writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i));
+
+ win_enable &= ~(1 << i);
+ win_protect |= 3 << (2 * i);
+ }
+
+ writel(win_enable, base + WINDOW_BAR_ENABLE);
+ msp->win_protect = win_protect;
+}
+
static int mv643xx_eth_shared_probe(struct platform_device *pdev)
{
static int mv643xx_version_printed = 0;
+ struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
struct mv643xx_shared_private *msp;
struct resource *res;
int ret;
@@ -2021,6 +2066,12 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, msp);
+ /*
+ * (Re-)program MBUS remapping windows if we are asked to.
+ */
+ if (pd != NULL && pd->dram != NULL)
+ mv643xx_eth_conf_mbus_windows(msp, pd->dram);
+
return 0;
out_free:
diff --git a/include/linux/mv643xx_eth.h b/include/linux/mv643xx_eth.h
index 2d59855..4801b02 100644
--- a/include/linux/mv643xx_eth.h
+++ b/include/linux/mv643xx_eth.h
@@ -5,6 +5,8 @@
#ifndef __LINUX_MV643XX_ETH_H
#define __LINUX_MV643XX_ETH_H
+#include <linux/mbus.h>
+
#define MV643XX_ETH_SHARED_NAME "mv643xx_eth_shared"
#define MV643XX_ETH_NAME "mv643xx_eth"
#define MV643XX_ETH_SHARED_REGS 0x2000
@@ -13,6 +15,10 @@
#define MV643XX_ETH_SIZE_REG_4 0x2224
#define MV643XX_ETH_BASE_ADDR_ENABLE_REG 0x2290
+struct mv643xx_eth_shared_platform_data {
+ struct mbus_dram_target_info *dram;
+};
+
struct mv643xx_eth_platform_data {
struct platform_device *shared;
int port_number;
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