diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/usb/ulpi/ulpi.c')
-rw-r--r-- | qemu/roms/u-boot/drivers/usb/ulpi/ulpi.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/drivers/usb/ulpi/ulpi.c b/qemu/roms/u-boot/drivers/usb/ulpi/ulpi.c new file mode 100644 index 000000000..f3d18564b --- /dev/null +++ b/qemu/roms/u-boot/drivers/usb/ulpi/ulpi.c @@ -0,0 +1,245 @@ +/* + * Copyright (C) 2011 Jana Rapava <fermata7@gmail.com> + * Copyright (C) 2011 CompuLab, Ltd. <www.compulab.co.il> + * + * Authors: Jana Rapava <fermata7@gmail.com> + * Igor Grinberg <grinberg@compulab.co.il> + * + * Based on: + * linux/drivers/usb/otg/ulpi.c + * Generic ULPI USB transceiver support + * + * Original Copyright follow: + * Copyright (C) 2009 Daniel Mack <daniel@caiaq.de> + * + * Based on sources from + * + * Sascha Hauer <s.hauer@pengutronix.de> + * Freescale Semiconductors + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <exports.h> +#include <usb/ulpi.h> + +#define ULPI_ID_REGS_COUNT 4 +#define ULPI_TEST_VALUE 0x55 /* 0x55 == 0b01010101 */ + +static struct ulpi_regs *ulpi = (struct ulpi_regs *)0; + +static int ulpi_integrity_check(struct ulpi_viewport *ulpi_vp) +{ + u32 val, tval = ULPI_TEST_VALUE; + int err, i; + + /* Use the 'special' test value to check all bits */ + for (i = 0; i < 2; i++, tval <<= 1) { + err = ulpi_write(ulpi_vp, &ulpi->scratch, tval); + if (err) + return err; + + val = ulpi_read(ulpi_vp, &ulpi->scratch); + if (val != tval) { + printf("ULPI integrity check failed\n"); + return val; + } + } + + return 0; +} + +int ulpi_init(struct ulpi_viewport *ulpi_vp) +{ + u32 val, id = 0; + u8 *reg = &ulpi->product_id_high; + int i; + + /* Assemble ID from four ULPI ID registers (8 bits each). */ + for (i = 0; i < ULPI_ID_REGS_COUNT; i++) { + val = ulpi_read(ulpi_vp, reg - i); + if (val == ULPI_ERROR) + return val; + + id = (id << 8) | val; + } + + /* Split ID into vendor and product ID. */ + debug("ULPI transceiver ID 0x%04x:0x%04x\n", id >> 16, id & 0xffff); + + return ulpi_integrity_check(ulpi_vp); +} + +int ulpi_select_transceiver(struct ulpi_viewport *ulpi_vp, unsigned speed) +{ + u32 tspeed = ULPI_FC_FULL_SPEED; + u32 val; + + switch (speed) { + case ULPI_FC_HIGH_SPEED: + case ULPI_FC_FULL_SPEED: + case ULPI_FC_LOW_SPEED: + case ULPI_FC_FS4LS: + tspeed = speed; + break; + default: + printf("ULPI: %s: wrong transceiver speed specified: %u, " + "falling back to full speed\n", __func__, speed); + } + + val = ulpi_read(ulpi_vp, &ulpi->function_ctrl); + if (val == ULPI_ERROR) + return val; + + /* clear the previous speed setting */ + val = (val & ~ULPI_FC_XCVRSEL_MASK) | tspeed; + + return ulpi_write(ulpi_vp, &ulpi->function_ctrl, val); +} + +int ulpi_set_vbus(struct ulpi_viewport *ulpi_vp, int on, int ext_power) +{ + u32 flags = ULPI_OTG_DRVVBUS; + u8 *reg = on ? &ulpi->otg_ctrl_set : &ulpi->otg_ctrl_clear; + + if (ext_power) + flags |= ULPI_OTG_DRVVBUS_EXT; + + return ulpi_write(ulpi_vp, reg, flags); +} + +int ulpi_set_vbus_indicator(struct ulpi_viewport *ulpi_vp, int external, + int passthu, int complement) +{ + u32 flags, val; + u8 *reg; + + reg = external ? &ulpi->otg_ctrl_set : &ulpi->otg_ctrl_clear; + val = ulpi_write(ulpi_vp, reg, ULPI_OTG_EXTVBUSIND); + if (val) + return val; + + flags = passthu ? ULPI_IFACE_PASSTHRU : 0; + flags |= complement ? ULPI_IFACE_EXTVBUS_COMPLEMENT : 0; + + val = ulpi_read(ulpi_vp, &ulpi->iface_ctrl); + if (val == ULPI_ERROR) + return val; + + val = val & ~(ULPI_IFACE_PASSTHRU & ULPI_IFACE_EXTVBUS_COMPLEMENT); + val |= flags; + val = ulpi_write(ulpi_vp, &ulpi->iface_ctrl, val); + if (val) + return val; + + return 0; +} + +int ulpi_set_pd(struct ulpi_viewport *ulpi_vp, int enable) +{ + u32 val = ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN; + u8 *reg = enable ? &ulpi->otg_ctrl_set : &ulpi->otg_ctrl_clear; + + return ulpi_write(ulpi_vp, reg, val); +} + +int ulpi_opmode_sel(struct ulpi_viewport *ulpi_vp, unsigned opmode) +{ + u32 topmode = ULPI_FC_OPMODE_NORMAL; + u32 val; + + switch (opmode) { + case ULPI_FC_OPMODE_NORMAL: + case ULPI_FC_OPMODE_NONDRIVING: + case ULPI_FC_OPMODE_DISABLE_NRZI: + case ULPI_FC_OPMODE_NOSYNC_NOEOP: + topmode = opmode; + break; + default: + printf("ULPI: %s: wrong OpMode specified: %u, " + "falling back to OpMode Normal\n", __func__, opmode); + } + + val = ulpi_read(ulpi_vp, &ulpi->function_ctrl); + if (val == ULPI_ERROR) + return val; + + /* clear the previous opmode setting */ + val = (val & ~ULPI_FC_OPMODE_MASK) | topmode; + + return ulpi_write(ulpi_vp, &ulpi->function_ctrl, val); +} + +int ulpi_serial_mode_enable(struct ulpi_viewport *ulpi_vp, unsigned smode) +{ + switch (smode) { + case ULPI_IFACE_6_PIN_SERIAL_MODE: + case ULPI_IFACE_3_PIN_SERIAL_MODE: + break; + default: + printf("ULPI: %s: unrecognized Serial Mode specified: %u\n", + __func__, smode); + return ULPI_ERROR; + } + + return ulpi_write(ulpi_vp, &ulpi->iface_ctrl_set, smode); +} + +int ulpi_suspend(struct ulpi_viewport *ulpi_vp) +{ + int err; + + err = ulpi_write(ulpi_vp, &ulpi->function_ctrl_clear, + ULPI_FC_SUSPENDM); + if (err) + printf("ULPI: %s: failed writing the suspend bit\n", __func__); + + return err; +} + +/* + * Wait for ULPI PHY reset to complete. + * Actual wait for reset must be done in a view port specific way, + * because it involves checking the DIR line. + */ +static int __ulpi_reset_wait(struct ulpi_viewport *ulpi_vp) +{ + u32 val; + int timeout = CONFIG_USB_ULPI_TIMEOUT; + + /* Wait for the RESET bit to become zero */ + while (--timeout) { + /* + * This function is generic and suppose to work + * with any viewport, so we cheat here and don't check + * for the error of ulpi_read(), if there is one, then + * there will be a timeout. + */ + val = ulpi_read(ulpi_vp, &ulpi->function_ctrl); + if (!(val & ULPI_FC_RESET)) + return 0; + + udelay(1); + } + + printf("ULPI: %s: reset timed out\n", __func__); + + return ULPI_ERROR; +} +int ulpi_reset_wait(struct ulpi_viewport *ulpi_vp) + __attribute__((weak, alias("__ulpi_reset_wait"))); + +int ulpi_reset(struct ulpi_viewport *ulpi_vp) +{ + int err; + + err = ulpi_write(ulpi_vp, + &ulpi->function_ctrl_set, ULPI_FC_RESET); + if (err) { + printf("ULPI: %s: failed writing reset bit\n", __func__); + return err; + } + + return ulpi_reset_wait(ulpi_vp); +} |