[U-Boot] [PATCH v6 16/20] tegra: usb: Add support for Tegra USB peripheral
Simon Glass
sjg at chromium.org
Mon Feb 27 21:52:49 CET 2012
This adds basic support for the Tegra2 USB controller. Board files should
call board_usb_init() to set things up.
Configuration is performed through the FDT, with aliases used to set the
order of the ports, like this fragment:
aliases {
/* This defines the order of our USB ports */
usb0 = "/usb at 0xc5008000";
usb1 = "/usb at 0xc5000000";
};
drivers/usb/host files ONLY: Acked-by: Remy Bohmer <linux at bohmer.net>
Signed-off-by: Simon Glass <sjg at chromium.org>
---
Changes in v2:
- Decode USB VBUS GPIO from the fdt
- Decode phy type differently (to match new kernel fdt)
- Improve debug() printouts in case of failure to init USB
- Remove non-fdt operation of USB, since it is not needed
- Rename params to timing
- Rename tegra20-usb to tegra20-ehcui (to match new kernel fdt)
- Store entire fdt config in port list, not just register pointer
Changes in v3:
- Remove usbparams properties from fdt and moved them to C code
Changes in v4:
- Use peripheral clock node to obtain peripheral ID
- Use updated fdtdec alias functiona to get USB aliases
Changes in v5:
- Add additional debugging to report active USB ports
- Allow any port to operate in otg mode
- Correct PTS_MASK value to be unsigned
- Implement new device tree properties
- Remove checking of peripheral ID and try to use only device tree
- Report error if phy clock does not start up
Changes in v6:
- Use updated clock_decode_periph_id() function
arch/arm/cpu/armv7/tegra2/Makefile | 4 +-
arch/arm/cpu/armv7/tegra2/usb.c | 460 +++++++++++++++++++++++++++++
arch/arm/include/asm/arch-tegra2/tegra2.h | 2 +
arch/arm/include/asm/arch-tegra2/usb.h | 252 ++++++++++++++++
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ehci-tegra.c | 62 ++++
include/fdtdec.h | 1 +
lib/fdtdec.c | 1 +
8 files changed, 782 insertions(+), 1 deletions(-)
create mode 100644 arch/arm/cpu/armv7/tegra2/usb.c
create mode 100644 arch/arm/include/asm/arch-tegra2/usb.h
create mode 100644 drivers/usb/host/ehci-tegra.c
diff --git a/arch/arm/cpu/armv7/tegra2/Makefile b/arch/arm/cpu/armv7/tegra2/Makefile
index f668a81..e9ac6c9 100644
--- a/arch/arm/cpu/armv7/tegra2/Makefile
+++ b/arch/arm/cpu/armv7/tegra2/Makefile
@@ -33,8 +33,10 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(SOC).o
SOBJS := lowlevel_init.o
-COBJS := ap20.o board.o clock.o funcmux.o pinmux.o sys_info.o timer.o
+COBJS-y := ap20.o board.o clock.o funcmux.o pinmux.o sys_info.o timer.o
+COBJS-$(CONFIG_USB_EHCI_TEGRA) += usb.o
+COBJS := $(COBJS-y)
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS) $(SOBJS))
diff --git a/arch/arm/cpu/armv7/tegra2/usb.c b/arch/arm/cpu/armv7/tegra2/usb.c
new file mode 100644
index 0000000..c80de7f
--- /dev/null
+++ b/arch/arm/cpu/armv7/tegra2/usb.c
@@ -0,0 +1,460 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * (C) Copyright 2010,2011 NVIDIA Corporation <www.nvidia.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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm-generic/gpio.h>
+#include <asm/arch/tegra2.h>
+#include <asm/arch/clk_rst.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/uart.h>
+#include <asm/arch/usb.h>
+#include <libfdt.h>
+#include <fdtdec.h>
+
+enum {
+ USB_PORTS_MAX = 4, /* Maximum ports we allow */
+};
+
+/* Parameters we need for USB */
+enum {
+ PARAM_DIVN, /* PLL FEEDBACK DIVIDer */
+ PARAM_DIVM, /* PLL INPUT DIVIDER */
+ PARAM_DIVP, /* POST DIVIDER (2^N) */
+ PARAM_CPCON, /* BASE PLLC CHARGE Pump setup ctrl */
+ PARAM_LFCON, /* BASE PLLC LOOP FILter setup ctrl */
+ PARAM_ENABLE_DELAY_COUNT, /* PLL-U Enable Delay Count */
+ PARAM_STABLE_COUNT, /* PLL-U STABLE count */
+ PARAM_ACTIVE_DELAY_COUNT, /* PLL-U Active delay count */
+ PARAM_XTAL_FREQ_COUNT, /* PLL-U XTAL frequency count */
+ PARAM_DEBOUNCE_A_TIME, /* 10MS DELAY for BIAS_DEBOUNCE_A */
+ PARAM_BIAS_TIME, /* 20US DELAY AFter bias cell op */
+
+ PARAM_COUNT
+};
+
+/* Possible port types (dual role mode) */
+enum dr_mode {
+ DR_MODE_NONE = 0,
+ DR_MODE_HOST, /* supports host operation */
+ DR_MODE_DEVICE, /* supports device operation */
+ DR_MODE_OTG, /* supports both */
+};
+
+/* Information about a USB port */
+struct fdt_usb {
+ struct usb_ctlr *reg; /* address of registers in physical memory */
+ unsigned utmi:1; /* 1 if port has external tranceiver, else 0 */
+ unsigned enabled:1; /* 1 to enable, 0 to disable */
+ unsigned has_legacy_mode:1; /* 1 if this port has legacy mode */
+ enum dr_mode dr_mode; /* dual role mode */
+ enum periph_id periph_id;/* peripheral id */
+ struct fdt_gpio_state vbus_gpio; /* GPIO for vbus enable */
+};
+
+static struct fdt_usb port[USB_PORTS_MAX]; /* List of valid USB ports */
+static unsigned port_count; /* Number of available ports */
+static int port_current; /* Current port (-1 = none) */
+
+/*
+ * This table has USB timing parameters for each Oscillator frequency we
+ * support. There are four sets of values:
+ *
+ * 1. PLLU configuration information (reference clock is osc/clk_m and
+ * PLLU-FOs are fixed at 12MHz/60MHz/480MHz).
+ *
+ * Reference frequency 13.0MHz 19.2MHz 12.0MHz 26.0MHz
+ * ----------------------------------------------------------------------
+ * DIVN 960 (0x3c0) 200 (0c8) 960 (3c0h) 960 (3c0)
+ * DIVM 13 (0d) 4 (04) 12 (0c) 26 (1a)
+ * Filter frequency (MHz) 1 4.8 6 2
+ * CPCON 1100b 0011b 1100b 1100b
+ * LFCON0 0 0 0 0
+ *
+ * 2. PLL CONFIGURATION & PARAMETERS for different clock generators:
+ *
+ * Reference frequency 13.0MHz 19.2MHz 12.0MHz 26.0MHz
+ * ---------------------------------------------------------------------------
+ * PLLU_ENABLE_DLY_COUNT 02 (0x02) 03 (03) 02 (02) 04 (04)
+ * PLLU_STABLE_COUNT 51 (33) 75 (4B) 47 (2F) 102 (66)
+ * PLL_ACTIVE_DLY_COUNT 05 (05) 06 (06) 04 (04) 09 (09)
+ * XTAL_FREQ_COUNT 127 (7F) 187 (BB) 118 (76) 254 (FE)
+ *
+ * 3. Debounce values IdDig, Avalid, Bvalid, VbusValid, VbusWakeUp, and
+ * SessEnd. Each of these signals have their own debouncer and for each of
+ * those one out of two debouncing times can be chosen (BIAS_DEBOUNCE_A or
+ * BIAS_DEBOUNCE_B).
+ *
+ * The values of DEBOUNCE_A and DEBOUNCE_B are calculated as follows:
+ * 0xffff -> No debouncing at all
+ * <n> ms = <n> *1000 / (1/19.2MHz) / 4
+ *
+ * So to program a 1 ms debounce for BIAS_DEBOUNCE_A, we have:
+ * BIAS_DEBOUNCE_A[15:0] = 1000 * 19.2 / 4 = 4800 = 0x12c0
+ *
+ * We need to use only DebounceA for BOOTROM. We don't need the DebounceB
+ * values, so we can keep those to default.
+ *
+ * 4. The 20 microsecond delay after bias cell operation.
+ */
+static const unsigned usb_pll[CLOCK_OSC_FREQ_COUNT][PARAM_COUNT] = {
+ /* DivN, DivM, DivP, CPCON, LFCON, Delays Debounce, Bias */
+ { 0x3C0, 0x0D, 0x00, 0xC, 0, 0x02, 0x33, 0x05, 0x7F, 0x7EF4, 5 },
+ { 0x0C8, 0x04, 0x00, 0x3, 0, 0x03, 0x4B, 0x06, 0xBB, 0xBB80, 7 },
+ { 0x3C0, 0x0C, 0x00, 0xC, 0, 0x02, 0x2F, 0x04, 0x76, 0x7530, 5 },
+ { 0x3C0, 0x1A, 0x00, 0xC, 0, 0x04, 0x66, 0x09, 0xFE, 0xFDE8, 9 }
+};
+
+/* UTMIP Idle Wait Delay */
+static const u8 utmip_idle_wait_delay = 17;
+
+/* UTMIP Elastic limit */
+static const u8 utmip_elastic_limit = 16;
+
+/* UTMIP High Speed Sync Start Delay */
+static const u8 utmip_hs_sync_start_delay = 9;
+
+/* Put the port into host mode (this only works for OTG ports) */
+static void set_host_mode(struct fdt_usb *config)
+{
+ if (config->dr_mode == DR_MODE_OTG) {
+ /* Check whether remote host from USB1 is driving VBus */
+ if (readl(&config->reg->phy_vbus_sensors) & VBUS_VLD_STS)
+ return;
+
+ /*
+ * If not driving, we set the GPIO to enable VBUS. We assume
+ * that the pinmux is set up correctly for this.
+ */
+ if (fdt_gpio_isvalid(&config->vbus_gpio)) {
+ fdtdec_setup_gpio(&config->vbus_gpio);
+ gpio_direction_output(config->vbus_gpio.gpio, 1);
+ debug("set_host_mode: GPIO %d high\n",
+ config->vbus_gpio.gpio);
+ }
+ }
+}
+
+void usbf_reset_controller(struct fdt_usb *config, struct usb_ctlr *usbctlr)
+{
+ /* Reset the USB controller with 2us delay */
+ reset_periph(config->periph_id, 2);
+
+ /*
+ * Set USB1_NO_LEGACY_MODE to 1, Registers are accessible under
+ * base address
+ */
+ if (config->has_legacy_mode)
+ setbits_le32(&usbctlr->usb1_legacy_ctrl, USB1_NO_LEGACY_MODE);
+
+ /* Put UTMIP1/3 in reset */
+ setbits_le32(&usbctlr->susp_ctrl, UTMIP_RESET);
+
+ /* Enable the UTMIP PHY */
+ if (config->utmi)
+ setbits_le32(&usbctlr->susp_ctrl, UTMIP_PHY_ENB);
+
+ /*
+ * TODO: where do we take the USB1 out of reset? The old code would
+ * take USB3 out of reset, but not USB1. This code doesn't do either.
+ */
+}
+
+/* set up the USB controller with the parameters provided */
+static int init_usb_controller(struct fdt_usb *config,
+ struct usb_ctlr *usbctlr, const u32 timing[])
+{
+ u32 val;
+ int loop_count;
+
+ clock_enable(config->periph_id);
+
+ /* Reset the usb controller */
+ usbf_reset_controller(config, usbctlr);
+
+ /* Stop crystal clock by setting UTMIP_PHY_XTAL_CLOCKEN low */
+ clrbits_le32(&usbctlr->utmip_misc_cfg1, UTMIP_PHY_XTAL_CLOCKEN);
+
+ /* Follow the crystal clock disable by >100ns delay */
+ udelay(1);
+
+ /*
+ * To Use the A Session Valid for cable detection logic, VBUS_WAKEUP
+ * mux must be switched to actually use a_sess_vld threshold.
+ */
+ if (fdt_gpio_isvalid(&config->vbus_gpio)) {
+ clrsetbits_le32(&usbctlr->usb1_legacy_ctrl,
+ VBUS_SENSE_CTL_MASK,
+ VBUS_SENSE_CTL_A_SESS_VLD << VBUS_SENSE_CTL_SHIFT);
+ }
+
+ /*
+ * PLL Delay CONFIGURATION settings. The following parameters control
+ * the bring up of the plls.
+ */
+ val = readl(&usbctlr->utmip_misc_cfg1);
+ clrsetbits_le32(&val, UTMIP_PLLU_STABLE_COUNT_MASK,
+ timing[PARAM_STABLE_COUNT] << UTMIP_PLLU_STABLE_COUNT_SHIFT);
+ clrsetbits_le32(&val, UTMIP_PLL_ACTIVE_DLY_COUNT_MASK,
+ timing[PARAM_ACTIVE_DELAY_COUNT] <<
+ UTMIP_PLL_ACTIVE_DLY_COUNT_SHIFT);
+ writel(val, &usbctlr->utmip_misc_cfg1);
+
+ /* Set PLL enable delay count and crystal frequency count */
+ val = readl(&usbctlr->utmip_pll_cfg1);
+ clrsetbits_le32(&val, UTMIP_PLLU_ENABLE_DLY_COUNT_MASK,
+ timing[PARAM_ENABLE_DELAY_COUNT] <<
+ UTMIP_PLLU_ENABLE_DLY_COUNT_SHIFT);
+ clrsetbits_le32(&val, UTMIP_XTAL_FREQ_COUNT_MASK,
+ timing[PARAM_XTAL_FREQ_COUNT] <<
+ UTMIP_XTAL_FREQ_COUNT_SHIFT);
+ writel(val, &usbctlr->utmip_pll_cfg1);
+
+ /* Setting the tracking length time */
+ clrsetbits_le32(&usbctlr->utmip_bias_cfg1,
+ UTMIP_BIAS_PDTRK_COUNT_MASK,
+ timing[PARAM_BIAS_TIME] << UTMIP_BIAS_PDTRK_COUNT_SHIFT);
+
+ /* Program debounce time for VBUS to become valid */
+ clrsetbits_le32(&usbctlr->utmip_debounce_cfg0,
+ UTMIP_DEBOUNCE_CFG0_MASK,
+ timing[PARAM_DEBOUNCE_A_TIME] << UTMIP_DEBOUNCE_CFG0_SHIFT);
+
+ setbits_le32(&usbctlr->utmip_tx_cfg0, UTMIP_FS_PREAMBLE_J);
+
+ /* Disable battery charge enabling bit */
+ setbits_le32(&usbctlr->utmip_bat_chrg_cfg0, UTMIP_PD_CHRG);
+
+ clrbits_le32(&usbctlr->utmip_xcvr_cfg0, UTMIP_XCVR_LSBIAS_SE);
+ setbits_le32(&usbctlr->utmip_spare_cfg0, FUSE_SETUP_SEL);
+
+ /*
+ * Configure the UTMIP_IDLE_WAIT and UTMIP_ELASTIC_LIMIT
+ * Setting these fields, together with default values of the
+ * other fields, results in programming the registers below as
+ * follows:
+ * UTMIP_HSRX_CFG0 = 0x9168c000
+ * UTMIP_HSRX_CFG1 = 0x13
+ */
+
+ /* Set PLL enable delay count and Crystal frequency count */
+ val = readl(&usbctlr->utmip_hsrx_cfg0);
+ clrsetbits_le32(&val, UTMIP_IDLE_WAIT_MASK,
+ utmip_idle_wait_delay << UTMIP_IDLE_WAIT_SHIFT);
+ clrsetbits_le32(&val, UTMIP_ELASTIC_LIMIT_MASK,
+ utmip_elastic_limit << UTMIP_ELASTIC_LIMIT_SHIFT);
+ writel(val, &usbctlr->utmip_hsrx_cfg0);
+
+ /* Configure the UTMIP_HS_SYNC_START_DLY */
+ clrsetbits_le32(&usbctlr->utmip_hsrx_cfg1,
+ UTMIP_HS_SYNC_START_DLY_MASK,
+ utmip_hs_sync_start_delay << UTMIP_HS_SYNC_START_DLY_SHIFT);
+
+ /* Preceed the crystal clock disable by >100ns delay. */
+ udelay(1);
+
+ /* Resuscitate crystal clock by setting UTMIP_PHY_XTAL_CLOCKEN */
+ setbits_le32(&usbctlr->utmip_misc_cfg1, UTMIP_PHY_XTAL_CLOCKEN);
+
+ /* Finished the per-controller init. */
+
+ /* De-assert UTMIP_RESET to bring out of reset. */
+ clrbits_le32(&usbctlr->susp_ctrl, UTMIP_RESET);
+
+ /* Wait for the phy clock to become valid in 100 ms */
+ for (loop_count = 100000; loop_count != 0; loop_count--) {
+ if (readl(&usbctlr->susp_ctrl) & USB_PHY_CLK_VALID)
+ break;
+ udelay(1);
+ }
+ if (loop_count == 100000)
+ return -1;
+
+ return 0;
+}
+
+static void power_up_port(struct usb_ctlr *usbctlr)
+{
+ /* Deassert power down state */
+ clrbits_le32(&usbctlr->utmip_xcvr_cfg0, UTMIP_FORCE_PD_POWERDOWN |
+ UTMIP_FORCE_PD2_POWERDOWN | UTMIP_FORCE_PDZI_POWERDOWN);
+ clrbits_le32(&usbctlr->utmip_xcvr_cfg1, UTMIP_FORCE_PDDISC_POWERDOWN |
+ UTMIP_FORCE_PDCHRP_POWERDOWN | UTMIP_FORCE_PDDR_POWERDOWN);
+}
+
+static void config_clock(const u32 timing[])
+{
+ clock_start_pll(CLOCK_ID_USB,
+ timing[PARAM_DIVM], timing[PARAM_DIVN], timing[PARAM_DIVP],
+ timing[PARAM_CPCON], timing[PARAM_LFCON]);
+}
+
+/**
+ * Add a new USB port to the list of available ports.
+ *
+ * @param config USB port configuration
+ * @return 0 if ok, -1 if error (too many ports)
+ */
+static int add_port(struct fdt_usb *config, const u32 timing[])
+{
+ struct usb_ctlr *usbctlr = config->reg;
+
+ if (port_count == USB_PORTS_MAX) {
+ debug("tegrausb: Cannot register more than %d ports\n",
+ USB_PORTS_MAX);
+ return -1;
+ }
+ if (init_usb_controller(config, usbctlr, timing)) {
+ debug("tegrausb: Cannot init port\n");
+ return -1;
+ }
+ if (config->utmi) {
+ /* Disable ICUSB FS/LS transceiver */
+ clrbits_le32(&usbctlr->icusb_ctrl, IC_ENB1);
+
+ /* Select UTMI parallel interface */
+ clrsetbits_le32(&usbctlr->port_sc1, PTS_MASK,
+ PTS_UTMI << PTS_SHIFT);
+ clrbits_le32(&usbctlr->port_sc1, STS);
+ power_up_port(usbctlr);
+ }
+ port[port_count++] = *config;
+
+ return 0;
+}
+
+int tegrausb_start_port(unsigned portnum, u32 *hccr, u32 *hcor)
+{
+ struct usb_ctlr *usbctlr;
+
+ if (portnum >= port_count)
+ return -1;
+ tegrausb_stop_port();
+ set_host_mode(&port[portnum]);
+
+ usbctlr = port[portnum].reg;
+ *hccr = (u32)&usbctlr->cap_length;
+ *hcor = (u32)&usbctlr->usb_cmd;
+ port_current = portnum;
+ return 0;
+}
+
+int tegrausb_stop_port(void)
+{
+ struct usb_ctlr *usbctlr;
+
+ if (port_current == -1)
+ return -1;
+
+ usbctlr = port[port_current].reg;
+
+ /* Stop controller */
+ writel(0, &usbctlr->usb_cmd);
+ udelay(1000);
+
+ /* Initiate controller reset */
+ writel(2, &usbctlr->usb_cmd);
+ udelay(1000);
+ port_current = -1;
+ return 0;
+}
+
+int fdt_decode_usb(const void *blob, int node, unsigned osc_frequency_mhz,
+ struct fdt_usb *config)
+{
+ const char *phy, *mode;
+
+ config->reg = (struct usb_ctlr *)fdtdec_get_addr(blob, node, "reg");
+ mode = fdt_getprop(blob, node, "dr_mode", NULL);
+ if (mode) {
+ if (0 == strcmp(mode, "host"))
+ config->dr_mode = DR_MODE_HOST;
+ else if (0 == strcmp(mode, "peripheral"))
+ config->dr_mode = DR_MODE_DEVICE;
+ else if (0 == strcmp(mode, "otg"))
+ config->dr_mode = DR_MODE_OTG;
+ else {
+ debug("%s: Cannot decode dr_mode '%s'\n", __func__,
+ mode);
+ return -FDT_ERR_NOTFOUND;
+ }
+ } else {
+ config->dr_mode = DR_MODE_HOST;
+ }
+
+ phy = fdt_getprop(blob, node, "phy_type", NULL);
+ config->utmi = phy && 0 == strcmp("utmi", phy);
+ config->enabled = fdtdec_get_is_enabled(blob, node);
+ config->has_legacy_mode = fdtdec_get_bool(blob, node,
+ "nvidia,has-legacy-mode");
+ config->periph_id = clock_decode_periph_id(blob, node);
+ if (config->periph_id == PERIPH_ID_NONE) {
+ debug("%s: Missing/invalid peripheral ID\n", __func__);
+ return -FDT_ERR_NOTFOUND;
+ }
+ fdtdec_decode_gpio(blob, node, "nvidia,vbus-gpio", &config->vbus_gpio);
+ debug("enabled=%d, legacy_mode=%d, utmi=%d, periph_id=%d, vbus=%d, "
+ "dr_mode=%d\n", config->enabled, config->has_legacy_mode,
+ config->utmi, config->periph_id, config->vbus_gpio.gpio,
+ config->dr_mode);
+
+ return 0;
+}
+
+int board_usb_init(const void *blob)
+{
+ struct fdt_usb config;
+ unsigned osc_freq = clock_get_rate(CLOCK_ID_OSC);
+ enum clock_osc_freq freq;
+ int node_list[USB_PORTS_MAX];
+ int node, count, i;
+
+ /* Set up the USB clocks correctly based on our oscillator frequency */
+ freq = clock_get_osc_freq();
+ config_clock(usb_pll[freq]);
+
+ /* count may return <0 on error */
+ count = fdtdec_find_aliases_for_id(blob, "usb",
+ COMPAT_NVIDIA_TEGRA20_USB, node_list, USB_PORTS_MAX);
+ for (i = 0; i < count; i++) {
+ debug("USB %d: ", i);
+ node = node_list[i];
+ if (!node)
+ continue;
+ if (fdt_decode_usb(blob, node, osc_freq, &config)) {
+ debug("Cannot decode USB node %s\n",
+ fdt_get_name(blob, node, NULL));
+ return -1;
+ }
+
+ if (add_port(&config, usb_pll[freq]))
+ return -1;
+ set_host_mode(&config);
+ }
+ port_current = -1;
+
+ return 0;
+}
diff --git a/arch/arm/include/asm/arch-tegra2/tegra2.h b/arch/arm/include/asm/arch-tegra2/tegra2.h
index 8941443..baae2eb 100644
--- a/arch/arm/include/asm/arch-tegra2/tegra2.h
+++ b/arch/arm/include/asm/arch-tegra2/tegra2.h
@@ -41,6 +41,8 @@
#define TEGRA2_SPI_BASE (NV_PA_APB_MISC_BASE + 0xC380)
#define NV_PA_PMC_BASE 0x7000E400
#define NV_PA_CSITE_BASE 0x70040000
+#define TEGRA_USB1_BASE 0xC5000000
+#define TEGRA_USB3_BASE 0xC5008000
#define TEGRA2_SDRC_CS0 NV_PA_SDRAM_BASE
#define LOW_LEVEL_SRAM_STACK 0x4000FFFC
diff --git a/arch/arm/include/asm/arch-tegra2/usb.h b/arch/arm/include/asm/arch-tegra2/usb.h
new file mode 100644
index 0000000..638033b
--- /dev/null
+++ b/arch/arm/include/asm/arch-tegra2/usb.h
@@ -0,0 +1,252 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _TEGRA_USB_H_
+#define _TEGRA_USB_H_
+
+
+/* USB Controller (USBx_CONTROLLER_) regs */
+struct usb_ctlr {
+ /* 0x000 */
+ uint id;
+ uint reserved0;
+ uint host;
+ uint device;
+
+ /* 0x010 */
+ uint txbuf;
+ uint rxbuf;
+ uint reserved1[2];
+
+ /* 0x020 */
+ uint reserved2[56];
+
+ /* 0x100 */
+ u16 cap_length;
+ u16 hci_version;
+ uint hcs_params;
+ uint hcc_params;
+ uint reserved3[5];
+
+ /* 0x120 */
+ uint dci_version;
+ uint dcc_params;
+ uint reserved4[6];
+
+ /* 0x140 */
+ uint usb_cmd;
+ uint usb_sts;
+ uint usb_intr;
+ uint frindex;
+
+ /* 0x150 */
+ uint reserved5;
+ uint periodic_list_base;
+ uint async_list_addr;
+ uint async_tt_sts;
+
+ /* 0x160 */
+ uint burst_size;
+ uint tx_fill_tuning;
+ uint reserved6; /* is this port_sc1 on some controllers? */
+ uint icusb_ctrl;
+
+ /* 0x170 */
+ uint ulpi_viewport;
+ uint reserved7;
+ uint endpt_nak;
+ uint endpt_nak_enable;
+
+ /* 0x180 */
+ uint reserved;
+ uint port_sc1;
+ uint reserved8[6];
+
+ /* 0x1a0 */
+ uint reserved9;
+ uint otgsc;
+ uint usb_mode;
+ uint endpt_setup_stat;
+
+ /* 0x1b0 */
+ uint reserved10[20];
+
+ /* 0x200 */
+ uint reserved11[0x80];
+
+ /* 0x400 */
+ uint susp_ctrl;
+ uint phy_vbus_sensors;
+ uint phy_vbus_wakeup_id;
+ uint phy_alt_vbus_sys;
+
+ /* 0x410 */
+ uint usb1_legacy_ctrl;
+ uint reserved12[3];
+
+ /* 0x420 */
+ uint reserved13[56];
+
+ /* 0x500 */
+ uint reserved14[64 * 3];
+
+ /* 0x800 */
+ uint utmip_pll_cfg0;
+ uint utmip_pll_cfg1;
+ uint utmip_xcvr_cfg0;
+ uint utmip_bias_cfg0;
+
+ /* 0x810 */
+ uint utmip_hsrx_cfg0;
+ uint utmip_hsrx_cfg1;
+ uint utmip_fslsrx_cfg0;
+ uint utmip_fslsrx_cfg1;
+
+ /* 0x820 */
+ uint utmip_tx_cfg0;
+ uint utmip_misc_cfg0;
+ uint utmip_misc_cfg1;
+ uint utmip_debounce_cfg0;
+
+ /* 0x830 */
+ uint utmip_bat_chrg_cfg0;
+ uint utmip_spare_cfg0;
+ uint utmip_xcvr_cfg1;
+ uint utmip_bias_cfg1;
+};
+
+
+/* USB1_LEGACY_CTRL */
+#define USB1_NO_LEGACY_MODE 1
+
+#define VBUS_SENSE_CTL_SHIFT 1
+#define VBUS_SENSE_CTL_MASK (3 << VBUS_SENSE_CTL_SHIFT)
+#define VBUS_SENSE_CTL_VBUS_WAKEUP 0
+#define VBUS_SENSE_CTL_AB_SESS_VLD_OR_VBUS_WAKEUP 1
+#define VBUS_SENSE_CTL_AB_SESS_VLD 2
+#define VBUS_SENSE_CTL_A_SESS_VLD 3
+
+/* USBx_IF_USB_SUSP_CTRL_0 */
+#define UTMIP_PHY_ENB (1 << 12)
+#define UTMIP_RESET (1 << 11)
+#define USB_PHY_CLK_VALID (1 << 7)
+
+/* USBx_UTMIP_MISC_CFG1 */
+#define UTMIP_PLLU_STABLE_COUNT_SHIFT 6
+#define UTMIP_PLLU_STABLE_COUNT_MASK \
+ (0xfff << UTMIP_PLLU_STABLE_COUNT_SHIFT)
+#define UTMIP_PLL_ACTIVE_DLY_COUNT_SHIFT 18
+#define UTMIP_PLL_ACTIVE_DLY_COUNT_MASK \
+ (0x1f << UTMIP_PLL_ACTIVE_DLY_COUNT_SHIFT)
+#define UTMIP_PHY_XTAL_CLOCKEN (1 << 30)
+
+/* USBx_UTMIP_PLL_CFG1_0 */
+#define UTMIP_PLLU_ENABLE_DLY_COUNT_SHIFT 27
+#define UTMIP_PLLU_ENABLE_DLY_COUNT_MASK \
+ (0xf << UTMIP_PLLU_ENABLE_DLY_COUNT_SHIFT)
+#define UTMIP_XTAL_FREQ_COUNT_SHIFT 0
+#define UTMIP_XTAL_FREQ_COUNT_MASK 0xfff
+
+/* USBx_UTMIP_BIAS_CFG1_0 */
+#define UTMIP_BIAS_PDTRK_COUNT_SHIFT 3
+#define UTMIP_BIAS_PDTRK_COUNT_MASK \
+ (0x1f << UTMIP_BIAS_PDTRK_COUNT_SHIFT)
+
+#define UTMIP_DEBOUNCE_CFG0_SHIFT 0
+#define UTMIP_DEBOUNCE_CFG0_MASK 0xffff
+
+/* USBx_UTMIP_TX_CFG0_0 */
+#define UTMIP_FS_PREAMBLE_J (1 << 19)
+
+/* USBx_UTMIP_BAT_CHRG_CFG0_0 */
+#define UTMIP_PD_CHRG 1
+
+/* USBx_UTMIP_XCVR_CFG0_0 */
+#define UTMIP_XCVR_LSBIAS_SE (1 << 21)
+
+/* USBx_UTMIP_SPARE_CFG0_0 */
+#define FUSE_SETUP_SEL (1 << 3)
+
+/* USBx_UTMIP_HSRX_CFG0_0 */
+#define UTMIP_IDLE_WAIT_SHIFT 15
+#define UTMIP_IDLE_WAIT_MASK (0x1f << UTMIP_IDLE_WAIT_SHIFT)
+#define UTMIP_ELASTIC_LIMIT_SHIFT 10
+#define UTMIP_ELASTIC_LIMIT_MASK \
+ (0x1f << UTMIP_ELASTIC_LIMIT_SHIFT)
+
+/* USBx_UTMIP_HSRX_CFG0_1 */
+#define UTMIP_HS_SYNC_START_DLY_SHIFT 1
+#define UTMIP_HS_SYNC_START_DLY_MASK \
+ (0xf << UTMIP_HS_SYNC_START_DLY_SHIFT)
+
+/* USBx_CONTROLLER_2_USB2D_ICUSB_CTRL_0 */
+#define IC_ENB1 (1 << 3)
+
+/* SB2_CONTROLLER_2_USB2D_PORTSC1_0 */
+#define PTS_SHIFT 30
+#define PTS_MASK (3U << PTS_SHIFT)
+#define PTS_UTMI 0
+#define PTS_RESERVED 1
+#define PTS_ULP 2
+#define PTS_ICUSB_SER 3
+
+#define STS (1 << 29)
+
+/* USBx_UTMIP_XCVR_CFG0_0 */
+#define UTMIP_FORCE_PD_POWERDOWN (1 << 14)
+#define UTMIP_FORCE_PD2_POWERDOWN (1 << 16)
+#define UTMIP_FORCE_PDZI_POWERDOWN (1 << 18)
+
+/* USBx_UTMIP_XCVR_CFG1_0 */
+#define UTMIP_FORCE_PDDISC_POWERDOWN (1 << 0)
+#define UTMIP_FORCE_PDCHRP_POWERDOWN (1 << 2)
+#define UTMIP_FORCE_PDDR_POWERDOWN (1 << 4)
+
+/* USB3_IF_USB_PHY_VBUS_SENSORS_0 */
+#define VBUS_VLD_STS (1 << 26)
+
+
+/* Change the USB host port into host mode */
+void usb_set_host_mode(void);
+
+/* Setup USB on the board */
+int board_usb_init(const void *blob);
+
+/**
+ * Start up the given port number (ports are numbered from 0 on each board).
+ * This returns values for the appropriate hccr and hcor addresses to use for
+ * USB EHCI operations.
+ *
+ * @param portnum port number to start
+ * @param hccr returns start address of EHCI HCCR registers
+ * @param hcor returns start address of EHCI HCOR registers
+ * @return 0 if ok, -1 on error (generally invalid port number)
+ */
+int tegrausb_start_port(unsigned portnum, u32 *hccr, u32 *hcor);
+
+/**
+ * Stop the current port
+ *
+ * @return 0 if ok, -1 if no port was active
+ */
+int tegrausb_stop_port(void);
+
+#endif /* _TEGRA_USB_H_ */
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 77e217f..a11cebb 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -47,6 +47,7 @@ COBJS-$(CONFIG_USB_EHCI_PPC4XX) += ehci-ppc4xx.o
COBJS-$(CONFIG_USB_EHCI_IXP4XX) += ehci-ixp.o
COBJS-$(CONFIG_USB_EHCI_KIRKWOOD) += ehci-kirkwood.o
COBJS-$(CONFIG_USB_EHCI_PCI) += ehci-pci.o
+COBJS-$(CONFIG_USB_EHCI_TEGRA) += ehci-tegra.o
COBJS-$(CONFIG_USB_EHCI_VCT) += ehci-vct.o
COBJS := $(COBJS-y)
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
new file mode 100644
index 0000000..a7e105b
--- /dev/null
+++ b/drivers/usb/host/ehci-tegra.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2009 NVIDIA Corporation
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <usb.h>
+
+#include "ehci.h"
+#include "ehci-core.h"
+
+#include <asm/errno.h>
+#include <asm/arch/usb.h>
+
+
+/*
+ * Create the appropriate control structures to manage
+ * a new EHCI host controller.
+ */
+int ehci_hcd_init(void)
+{
+ u32 our_hccr, our_hcor;
+
+ /*
+ * Select the first port, as we don't have a way of selecting others
+ * yet
+ */
+ if (tegrausb_start_port(0, &our_hccr, &our_hcor))
+ return -1;
+
+ hccr = (struct ehci_hccr *)our_hccr;
+ hcor = (struct ehci_hcor *)our_hcor;
+
+ return 0;
+}
+
+/*
+ * Destroy the appropriate control structures corresponding
+ * the the EHCI host controller.
+ */
+int ehci_hcd_stop(void)
+{
+ tegrausb_stop_port();
+ return 0;
+}
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 6c0a2d1..2ac8c9c 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -57,6 +57,7 @@ struct fdt_memory {
*/
enum fdt_compat_id {
COMPAT_UNKNOWN,
+ COMPAT_NVIDIA_TEGRA20_USB, /* Tegra2 USB port */
COMPAT_COUNT,
};
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index c748cac..5f137a5 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -37,6 +37,7 @@ DECLARE_GLOBAL_DATA_PTR;
#define COMPAT(id, name) name
static const char * const compat_names[COMPAT_COUNT] = {
COMPAT(UNKNOWN, "<none>"),
+ COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"),
};
const char *fdtdec_get_compatible(enum fdt_compat_id id)
--
1.7.7.3
More information about the U-Boot
mailing list