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authorAjay Bhargav <ajay.bhargav@einfochips.com>2012-02-13 03:27:42 +0000
committerMarek Vasut <marek.vasut@gmail.com>2012-03-19 00:08:26 +0100
commit732c7c2446fb98fb2c3b7879f33080286a2d620d (patch)
tree97a752ef303184622241f918e45894f41a5008af /drivers
parentf0bc5df45a7976ee96cdb7a967ae368397d9d66a (diff)
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USB: Armada100: Add UTMI PHY interface driver
This patch adds USB host controller's UTMI PHY interface driver for Armada100 SOCs. Signed-off-by: Ajay Bhargav <ajay.bhargav@einfochips.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/host/utmi-armada100.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/usb/host/utmi-armada100.c b/drivers/usb/host/utmi-armada100.c
new file mode 100644
index 0000000..6f1bd20
--- /dev/null
+++ b/drivers/usb/host/utmi-armada100.c
@@ -0,0 +1,96 @@
+/*
+ * (C) Copyright 2012
+ * eInfochips Ltd. <www.einfochips.com>
+ * Written-by: Ajay Bhargav <ajay.bhargav@einfochips.com>
+ *
+ * (C) Copyright 2009
+ * Marvell Semiconductor <www.marvell.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <usb.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/armada100.h>
+#include <asm/arch/utmi-armada100.h>
+
+static int utmi_phy_init(void)
+{
+ struct armd1usb_phy_reg *phy_regs =
+ (struct armd1usb_phy_reg *)UTMI_PHY_BASE;
+ int timeout;
+
+ setbits_le32(&phy_regs->utmi_ctrl, INPKT_DELAY_SOF | PLL_PWR_UP);
+ udelay(1000);
+ setbits_le32(&phy_regs->utmi_ctrl, PHY_PWR_UP);
+
+ clrbits_le32(&phy_regs->utmi_pll, PLL_FBDIV_MASK | PLL_REFDIV_MASK);
+ setbits_le32(&phy_regs->utmi_pll, N_DIVIDER << PLL_FBDIV | M_DIVIDER);
+
+ setbits_le32(&phy_regs->utmi_tx, PHSEL_VAL << CK60_PHSEL);
+
+ /* Calibrate pll */
+ timeout = 10000;
+ while (--timeout && ((readl(&phy_regs->utmi_pll) & PLL_READY) == 0))
+ ;
+ if (!timeout)
+ return -1;
+
+ udelay(200);
+ setbits_le32(&phy_regs->utmi_pll, VCOCAL_START);
+ udelay(400);
+ clrbits_le32(&phy_regs->utmi_pll, VCOCAL_START);
+
+ udelay(200);
+ setbits_le32(&phy_regs->utmi_tx, RCAL_START);
+ udelay(400);
+ clrbits_le32(&phy_regs->utmi_tx, RCAL_START);
+
+ timeout = 10000;
+ while (--timeout && ((readl(&phy_regs->utmi_pll) & PLL_READY) == 0))
+ ;
+ if (!timeout)
+ return -1;
+
+ return 0;
+}
+
+/*
+ * Initialize USB host controller's UTMI Physical interface
+ */
+int utmi_init(void)
+{
+ struct armd1mpmu_registers *mpmu_regs =
+ (struct armd1mpmu_registers *)ARMD1_MPMU_BASE;
+
+ struct armd1apmu_registers *apmu_regs =
+ (struct armd1apmu_registers *)ARMD1_APMU_BASE;
+
+ /* Turn on 26Mhz ref clock for UTMI PLL */
+ setbits_le32(&mpmu_regs->acgr, APB2_26M_EN | AP_26M);
+
+ /* USB Clock reset */
+ writel(USB_SPH_AXICLK_EN, &apmu_regs->usbcrc);
+ writel(USB_SPH_AXICLK_EN | USB_SPH_AXI_RST, &apmu_regs->usbcrc);
+
+ /* Initialize UTMI transceiver */
+ return utmi_phy_init();
+}