[U-Boot] [v3 1/3] USB: Armada100: Add UTMI PHY interface driver
Ajay Bhargav
ajay.bhargav at einfochips.com
Mon Feb 13 14:27:42 CET 2012
This patch adds USB host controller's UTMI PHY interface driver for
Armada100 SOCs.
Signed-off-by: Ajay Bhargav <ajay.bhargav at einfochips.com>
---
Changes for v2:
- Fix: enable only required clock in MPMU
Changes for v3:
- Added timeout on while loops
- moved utmi-armada100.h to arch include folder
arch/arm/include/asm/arch-armada100/armada100.h | 8 ++
.../include/asm/arch-armada100/utmi-armada100.h | 79 ++++++++++++++++
drivers/usb/host/utmi-armada100.c | 96 ++++++++++++++++++++
3 files changed, 183 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/include/asm/arch-armada100/utmi-armada100.h
create mode 100644 drivers/usb/host/utmi-armada100.c
diff --git a/arch/arm/include/asm/arch-armada100/armada100.h b/arch/arm/include/asm/arch-armada100/armada100.h
index 0ed3a8e..70fba27 100644
--- a/arch/arm/include/asm/arch-armada100/armada100.h
+++ b/arch/arm/include/asm/arch-armada100/armada100.h
@@ -43,6 +43,14 @@
#define SSP2_APBCLK 0x01
#define SSP2_FNCLK 0x02
+/* USB Clock/reset control bits */
+#define USB_SPH_AXICLK_EN 0x10
+#define USB_SPH_AXI_RST 0x02
+
+/* MPMU Clocks */
+#define APB2_26M_EN (1 << 20)
+#define AP_26M (1 << 4)
+
/* Register Base Addresses */
#define ARMD1_DRAM_BASE 0xB0000000
#define ARMD1_FEC_BASE 0xC0800000
diff --git a/arch/arm/include/asm/arch-armada100/utmi-armada100.h b/arch/arm/include/asm/arch-armada100/utmi-armada100.h
new file mode 100644
index 0000000..dd0ccdb
--- /dev/null
+++ b/arch/arm/include/asm/arch-armada100/utmi-armada100.h
@@ -0,0 +1,79 @@
+/*
+ * (C) Copyright 2012
+ * eInfochips Ltd. <www.einfochips.com>
+ * Written-by: Ajay Bhargav <ajay.bhargav at 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
+ */
+
+#ifndef __UTMI_ARMADA100__
+#define __UTMI_ARMADA100__
+
+#define UTMI_PHY_BASE 0xD4206000
+
+/* utmi_ctrl - bits */
+#define INPKT_DELAY_SOF (1 << 28)
+#define PLL_PWR_UP 2
+#define PHY_PWR_UP 1
+
+/* utmi_pll - bits */
+#define PLL_FBDIV_MASK 0x00000FF0
+#define PLL_FBDIV 4
+#define PLL_REFDIV_MASK 0x0000000F
+#define PLL_REFDIV 0
+#define PLL_READY 0x800000
+#define VCOCAL_START (1 << 21)
+
+#define N_DIVIDER 0xEE
+#define M_DIVIDER 0x0B
+
+/* utmi_tx - bits */
+#define CK60_PHSEL 17
+#define PHSEL_VAL 0x4
+#define RCAL_START (1 << 12)
+
+/*
+ * USB PHY registers
+ * Refer Datasheet Appendix A.21
+ */
+struct armd1usb_phy_reg {
+ u32 utmi_rev; /* USB PHY Revision */
+ u32 utmi_ctrl; /* USB PHY Control register */
+ u32 utmi_pll; /* PLL register */
+ u32 utmi_tx; /* Tx register */
+ u32 utmi_rx; /* Rx register */
+ u32 utmi_ivref; /* IVREF register */
+ u32 utmi_tst_g0; /* Test group 0 register */
+ u32 utmi_tst_g1; /* Test group 1 register */
+ u32 utmi_tst_g2; /* Test group 2 register */
+ u32 utmi_tst_g3; /* Test group 3 register */
+ u32 utmi_tst_g4; /* Test group 4 register */
+ u32 utmi_tst_g5; /* Test group 5 register */
+ u32 utmi_reserve; /* Reserve Register */
+ u32 utmi_usb_int; /* USB interuppt register */
+ u32 utmi_dbg_ctl; /* Debug control register */
+ u32 utmi_otg_addon; /* OTG addon register */
+};
+
+int utmi_init(void);
+
+#endif /* __UTMI_ARMADA100__ */
diff --git a/drivers/usb/host/utmi-armada100.c b/drivers/usb/host/utmi-armada100.c
new file mode 100644
index 0000000..124fa8f
--- /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 at 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();
+}
--
1.7.7.2
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