diff options
Diffstat (limited to 'arch/arm/cpu/armv7/tegra2')
| -rw-r--r-- | arch/arm/cpu/armv7/tegra2/Makefile | 4 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/tegra2/ap20.c | 20 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/tegra2/board.c | 2 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/tegra2/clock.c | 121 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/tegra2/config.mk | 2 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/tegra2/usb.c | 460 |
6 files changed, 575 insertions, 34 deletions
diff --git a/arch/arm/cpu/armv7/tegra2/Makefile b/arch/arm/cpu/armv7/tegra2/Makefile index f668a818fb..e9ac6c9a71 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/ap20.c b/arch/arm/cpu/armv7/tegra2/ap20.c index 4c44bb3637..b749821e5a 100644 --- a/arch/arm/cpu/armv7/tegra2/ap20.c +++ b/arch/arm/cpu/armv7/tegra2/ap20.c @@ -105,14 +105,14 @@ static void enable_cpu_clock(int enable) static int is_cpu_powered(void) { - struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; + struct pmc_ctlr *pmc = (struct pmc_ctlr *)TEGRA2_PMC_BASE; return (readl(&pmc->pmc_pwrgate_status) & CPU_PWRED) ? 1 : 0; } static void remove_cpu_io_clamps(void) { - struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; + struct pmc_ctlr *pmc = (struct pmc_ctlr *)TEGRA2_PMC_BASE; u32 reg; /* Remove the clamps on the CPU I/O signals */ @@ -126,7 +126,7 @@ static void remove_cpu_io_clamps(void) static void powerup_cpu(void) { - struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; + struct pmc_ctlr *pmc = (struct pmc_ctlr *)TEGRA2_PMC_BASE; u32 reg; int timeout = IO_STABILIZATION_DELAY; @@ -157,7 +157,7 @@ static void powerup_cpu(void) static void enable_cpu_power_rail(void) { - struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; + struct pmc_ctlr *pmc = (struct pmc_ctlr *)TEGRA2_PMC_BASE; u32 reg; reg = readl(&pmc->pmc_cntrl); @@ -277,7 +277,7 @@ void enable_scu(void) void init_pmc_scratch(void) { - struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; + struct pmc_ctlr *const pmc = (struct pmc_ctlr *)TEGRA2_PMC_BASE; int i; /* SCRATCH0 is initialized by the boot ROM and shouldn't be cleared */ @@ -298,11 +298,11 @@ void tegra2_start(void) writel(0xC0, &pmt->pmt_cfg_ctl); /* - * If we are ARM7 - give it a different stack. We are about to - * start up the A9 which will want to use this one. - */ - asm volatile("ldr sp, =%c0\n" - : : "i"(AVP_EARLY_BOOT_STACK_LIMIT)); + * If we are ARM7 - give it a different stack. We are about to + * start up the A9 which will want to use this one. + */ + asm volatile("mov sp, %0\n" + : : "r"(AVP_EARLY_BOOT_STACK_LIMIT)); start_cpu((u32)_start); halt_avp(); diff --git a/arch/arm/cpu/armv7/tegra2/board.c b/arch/arm/cpu/armv7/tegra2/board.c index 349d50e1ac..a797e6fc30 100644 --- a/arch/arm/cpu/armv7/tegra2/board.c +++ b/arch/arm/cpu/armv7/tegra2/board.c @@ -47,7 +47,7 @@ enum { unsigned int query_sdram_size(void) { - struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; + struct pmc_ctlr *const pmc = (struct pmc_ctlr *)TEGRA2_PMC_BASE; u32 reg; reg = readl(&pmc->pmc_scratch20); diff --git a/arch/arm/cpu/armv7/tegra2/clock.c b/arch/arm/cpu/armv7/tegra2/clock.c index 11d2346d83..39376ab86e 100644 --- a/arch/arm/cpu/armv7/tegra2/clock.c +++ b/arch/arm/cpu/armv7/tegra2/clock.c @@ -28,6 +28,7 @@ #include <asm/arch/tegra2.h> #include <common.h> #include <div64.h> +#include <fdtdec.h> /* * This is our record of the current clock rate of each clock. We don't @@ -67,6 +68,7 @@ enum clock_type_id { CLOCK_TYPE_MCPT, CLOCK_TYPE_PCM, CLOCK_TYPE_PCMT, + CLOCK_TYPE_PCMT16, /* CLOCK_TYPE_PCMT with 16-bit divider */ CLOCK_TYPE_PCXTS, CLOCK_TYPE_PDCT, @@ -98,6 +100,7 @@ static enum clock_id clock_source[CLOCK_TYPE_COUNT][CLOCK_MAX_MUX] = { { CLK(MEMORY), CLK(CGENERAL), CLK(PERIPH), CLK(OSC) }, { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(NONE) }, { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(OSC) }, + { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(OSC) }, { CLK(PERIPH), CLK(CGENERAL), CLK(XCPU), CLK(OSC) }, { CLK(PERIPH), CLK(DISPLAY), CLK(CGENERAL), CLK(OSC) }, }; @@ -211,8 +214,8 @@ static enum clock_type_id clock_periph_type[PERIPHC_COUNT] = { /* 0x08 */ TYPE(PERIPHC_XIO, CLOCK_TYPE_PCMT), - TYPE(PERIPHC_I2C1, CLOCK_TYPE_PCMT), - TYPE(PERIPHC_DVC_I2C, CLOCK_TYPE_PCMT), + TYPE(PERIPHC_I2C1, CLOCK_TYPE_PCMT16), + TYPE(PERIPHC_DVC_I2C, CLOCK_TYPE_PCMT16), TYPE(PERIPHC_TWC, CLOCK_TYPE_PCMT), TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), TYPE(PERIPHC_SPI1, CLOCK_TYPE_PCMT), @@ -246,7 +249,7 @@ static enum clock_type_id clock_periph_type[PERIPHC_COUNT] = { TYPE(PERIPHC_HDMI, CLOCK_TYPE_PDCT), TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), TYPE(PERIPHC_TVDAC, CLOCK_TYPE_PDCT), - TYPE(PERIPHC_I2C2, CLOCK_TYPE_PCMT), + TYPE(PERIPHC_I2C2, CLOCK_TYPE_PCMT16), TYPE(PERIPHC_EMC, CLOCK_TYPE_MCPT), /* 0x28 */ @@ -256,7 +259,7 @@ static enum clock_type_id clock_periph_type[PERIPHC_COUNT] = { TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), TYPE(PERIPHC_SPI4, CLOCK_TYPE_PCMT), - TYPE(PERIPHC_I2C3, CLOCK_TYPE_PCMT), + TYPE(PERIPHC_I2C3, CLOCK_TYPE_PCMT16), TYPE(PERIPHC_SDMMC3, CLOCK_TYPE_PCMT), /* 0x30 */ @@ -518,14 +521,16 @@ void clock_ll_set_source(enum periph_id periph_id, unsigned source) * Given the parent's rate and the required rate for the children, this works * out the peripheral clock divider to use, in 7.1 binary format. * + * @param divider_bits number of divider bits (8 or 16) * @param parent_rate clock rate of parent clock in Hz * @param rate required clock rate for this clock * @return divider which should be used */ -static int clk_div7_1_get_divider(unsigned long parent_rate, - unsigned long rate) +static int clk_get_divider(unsigned divider_bits, unsigned long parent_rate, + unsigned long rate) { u64 divider = parent_rate * 2; + unsigned max_divider = 1 << divider_bits; divider += rate - 1; do_div(divider, rate); @@ -533,7 +538,7 @@ static int clk_div7_1_get_divider(unsigned long parent_rate, if ((s64)divider - 2 < 0) return 0; - if ((s64)divider - 2 > 255) + if ((s64)divider - 2 >= max_divider) return -1; return divider - 2; @@ -571,6 +576,7 @@ unsigned long clock_get_periph_rate(enum periph_id periph_id, * required child clock rate. This function assumes that a second-stage * divisor is available which can divide by powers of 2 from 1 to 256. * + * @param divider_bits number of divider bits (8 or 16) * @param parent_rate clock rate of parent clock in Hz * @param rate required clock rate for this clock * @param extra_div value for the second-stage divisor (not set if this @@ -578,8 +584,8 @@ unsigned long clock_get_periph_rate(enum periph_id periph_id, * @return divider which should be used, or -1 if nothing is valid * */ -static int find_best_divider(unsigned long parent_rate, unsigned long rate, - int *extra_div) +static int find_best_divider(unsigned divider_bits, unsigned long parent_rate, + unsigned long rate, int *extra_div) { int shift; int best_divider = -1; @@ -588,7 +594,8 @@ static int find_best_divider(unsigned long parent_rate, unsigned long rate, /* try dividers from 1 to 256 and find closest match */ for (shift = 0; shift <= 8 && best_error > 0; shift++) { unsigned divided_parent = parent_rate >> shift; - int divider = clk_div7_1_get_divider(divided_parent, rate); + int divider = clk_get_divider(divider_bits, divided_parent, + rate); unsigned effective_rate = get_rate_from_divider(divided_parent, divider); int error = rate - effective_rate; @@ -614,10 +621,11 @@ static int find_best_divider(unsigned long parent_rate, unsigned long rate, * @param periph_id peripheral to start * @param source PLL id of required parent clock * @param mux_bits Set to number of bits in mux register: 2 or 4 + * @param divider_bits Set to number of divider bits (8 or 16) * @return mux value (0-4, or -1 if not found) */ static int get_periph_clock_source(enum periph_id periph_id, - enum clock_id parent, int *mux_bits) + enum clock_id parent, int *mux_bits, int *divider_bits) { enum clock_type_id type; enum periphc_internal_id internal_id; @@ -631,11 +639,18 @@ static int get_periph_clock_source(enum periph_id periph_id, type = clock_periph_type[internal_id]; assert(clock_type_id_isvalid(type)); - /* Special case here for the clock with a 4-bit source mux */ + /* + * Special cases here for the clock with a 4-bit source mux and I2C + * with its 16-bit divisor + */ if (type == CLOCK_TYPE_PCXTS) *mux_bits = 4; else *mux_bits = 2; + if (type == CLOCK_TYPE_PCMT16) + *divider_bits = 16; + else + *divider_bits = 8; for (mux = 0; mux < CLOCK_MAX_MUX; mux++) if (clock_source[type][mux] == parent) @@ -661,24 +676,22 @@ static int get_periph_clock_source(enum periph_id periph_id, * Adjust peripheral PLL to use the given divider and source. * * @param periph_id peripheral to adjust - * @param parent Required parent clock (for source mux) - * @param divider Required divider in 7.1 format + * @param source Source number (0-3 or 0-7) + * @param mux_bits Number of mux bits (2 or 4) + * @param divider Required divider in 7.1 or 15.1 format * @return 0 if ok, -1 on error (requesting a parent clock which is not valid * for this peripheral) */ -static int adjust_periph_pll(enum periph_id periph_id, - enum clock_id parent, unsigned divider) +static int adjust_periph_pll(enum periph_id periph_id, int source, + int mux_bits, unsigned divider) { u32 *reg = get_periph_source_reg(periph_id); - unsigned source; - int mux_bits; clrsetbits_le32(reg, OUT_CLK_DIVISOR_MASK, divider << OUT_CLK_DIVISOR_SHIFT); udelay(1); /* work out the source clock and set it */ - source = get_periph_clock_source(periph_id, parent, &mux_bits); if (source < 0) return -1; if (mux_bits == 4) { @@ -696,14 +709,21 @@ unsigned clock_adjust_periph_pll_div(enum periph_id periph_id, enum clock_id parent, unsigned rate, int *extra_div) { unsigned effective_rate; + int mux_bits, divider_bits, source; int divider; + /* work out the source clock and set it */ + source = get_periph_clock_source(periph_id, parent, &mux_bits, + ÷r_bits); + if (extra_div) - divider = find_best_divider(pll_rate[parent], rate, extra_div); + divider = find_best_divider(divider_bits, pll_rate[parent], + rate, extra_div); else - divider = clk_div7_1_get_divider(pll_rate[parent], rate); + divider = clk_get_divider(divider_bits, pll_rate[parent], + rate); assert(divider >= 0); - if (adjust_periph_pll(periph_id, parent, divider)) + if (adjust_periph_pll(periph_id, source, mux_bits, divider)) return -1U; debug("periph %d, rate=%d, reg=%p = %x\n", periph_id, rate, get_periph_source_reg(periph_id), @@ -918,6 +938,63 @@ void clock_ll_start_uart(enum periph_id periph_id) reset_set_enable(periph_id, 0); } +#ifdef CONFIG_OF_CONTROL +/* + * Convert a device tree clock ID to our peripheral ID. They are mostly + * the same but we are very cautious so we check that a valid clock ID is + * provided. + * + * @param clk_id Clock ID according to tegra2 device tree binding + * @return peripheral ID, or PERIPH_ID_NONE if the clock ID is invalid + */ +static enum periph_id clk_id_to_periph_id(int clk_id) +{ + if (clk_id > 95) + return PERIPH_ID_NONE; + + switch (clk_id) { + case 1: + case 2: + case 7: + case 10: + case 20: + case 30: + case 35: + case 49: + case 56: + case 74: + case 76: + case 77: + case 78: + case 79: + case 80: + case 81: + case 82: + case 83: + case 91: + case 95: + return PERIPH_ID_NONE; + default: + return clk_id; + } +} + +int clock_decode_periph_id(const void *blob, int node) +{ + enum periph_id id; + u32 cell[2]; + int err; + + err = fdtdec_get_int_array(blob, node, "clocks", cell, + ARRAY_SIZE(cell)); + if (err) + return -1; + id = clk_id_to_periph_id(cell[1]); + assert(clock_periph_id_isvalid(id)); + return id; +} +#endif /* CONFIG_OF_CONTROL */ + int clock_verify(void) { struct clk_pll *pll = get_pll(CLOCK_ID_PERIPH); diff --git a/arch/arm/cpu/armv7/tegra2/config.mk b/arch/arm/cpu/armv7/tegra2/config.mk index 2303dba079..fe9ef5b763 100644 --- a/arch/arm/cpu/armv7/tegra2/config.mk +++ b/arch/arm/cpu/armv7/tegra2/config.mk @@ -31,3 +31,5 @@ CFLAGS_arch/arm/lib/board.o += -march=armv4t endif USE_PRIVATE_LIBGCC = yes + +CONFIG_ARCH_DEVICE_TREE := tegra20 diff --git a/arch/arm/cpu/armv7/tegra2/usb.c b/arch/arm/cpu/armv7/tegra2/usb.c new file mode 100644 index 0000000000..c80de7f6a3 --- /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; +} |
