diff options
Diffstat (limited to 'board/scalys/grapeboard/usb_grapeboard.c')
| -rw-r--r-- | board/scalys/grapeboard/usb_grapeboard.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/board/scalys/grapeboard/usb_grapeboard.c b/board/scalys/grapeboard/usb_grapeboard.c new file mode 100644 index 0000000..176c4be --- /dev/null +++ b/board/scalys/grapeboard/usb_grapeboard.c @@ -0,0 +1,103 @@ +/* + * Copyright 2017 Scalys B.V. + * opensource@scalys.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <i2c.h> +#include <asm/io.h> + +#define MIN(X,Y) ((X) < (Y) ? (X) : (Y)) + +#define I2C_ADDRESS_USB_HUB 0x60 +#define MAX_I2C_ATTEMPTS 10 + +#define HX3_SETTINGS_SIZE 192 + +/* Cypress HX3 hub settings blob */ +const uint8_t hx3_settings[5 + HX3_SETTINGS_SIZE] = { + 'C', 'Y', /* Cypress magic signature */ + 0x30, /* I2C speed : 100kHz */ + 0xd4, /* Image type: Only settings, no firmware */ + HX3_SETTINGS_SIZE, /* payload size (192) */ + 0xb4, 0x04, /* VID */ + 0x04, 0x65, /* PID */ + 0x0a, 0x50, /* DID */ + 0x00, /* Reserved */ + 0x0f, /* 4 SuperSpeed ports, no shared link */ + 0x32, /* bPwrOn2PwrGood : 100 ms */ + 0x7f, /* 4 Downstream ports : DS4 is non-removable (MCU) */ + 0xe1, /* LEDs disabled, Ganged power switching */ + 0xa0, /* suspend indicator disabled, power switch control is active high */ + 0x04, /* BC v1.2 disabled, apple charging 1A, ghost charging disabled */ + 0x00, /* port charging, cdp & dcp disabled */ + 0xd8, /* US is embedded port, overcurrent input is active high */ + 0x00, /* reserved */ + 0x08, /* USB String descriptors enabled */ + 0x00, 0x00, + 0x12, 0x00, 0x2c, + 0x66, 0x66, /* USB3.0 TX driver de-emphasis */ + 0x69, 0x29, 0x29, 0x29, 0x29, /* TX amplitude */ + 0x00, /* Reserved */ + 0x06, 0x65, /* USB 2.0 PID */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* Reserved */ + 0x04, 0x03, 0x09, 0x04, /* LangID = 0x0409 US English */ + 0x18, 0x03, /* Manufacturer string descriptor */ + 0x32, 0x00, 0x30, 0x00, 0x31, 0x00, 0x37, 0x00, + 0x20, 0x00, 0x53, 0x00, 0x63, 0x00, 0x61, 0x00, + 0x6c, 0x00, 0x79, 0x00, 0x73, 0x00, + 0x2c, 0x03, /* Product string descriptor */ + 0x47, 0x00, 0x72, 0x00, 0x61, 0x00, 0x70, 0x00, + 0x65, 0x00, 0x62, 0x00, 0x6f, 0x00, 0x61, 0x00, + 0x72, 0x00, 0x64, 0x00, 0x20, 0x00, 0x43, 0x00, + 0x59, 0x00, 0x2d, 0x00, 0x48, 0x00, 0x58, 0x00, + 0x33, 0x00, 0x20, 0x00, 0x48, 0x00, 0x55, 0x00, + 0x42, 0x00, + 0x1a, 0x03, /* Serial string descriptor */ + 0x47, 0x00, 0x72, 0x00, 0x61, 0x00, 0x70, 0x00, + 0x65, 0x00, 0x62, 0x00, 0x6f, 0x00, 0x61, 0x00, + 0x72, 0x00, 0x64, 0x00, 0x20, 0x00, 0x31, 0x00, + 0x39, 0x00, 0x41, 0x00, + 0x00 +}; + +int usb_hub_init(void) { + int length, index = 0, i2c_attempts = 0; + const int settings_size = sizeof(hx3_settings); + uint8_t *data = (uint8_t *)hx3_settings; + + /* + * Configure USB hub slave + * + * The Hx3 starts in an i2c slave bootloader mode until sufficient and correct data is written to it over I2C. + * If transferred data is incorrect then the device will hang until it has been reset. + */ + puts("USB: configuring hub...."); + + while(index <= settings_size - 1){ + length = MIN(64, (settings_size - index)); + + if(i2c_write(I2C_ADDRESS_USB_HUB, index, 2, data, length)) { + if(i2c_attempts < 1) + printf("\nI2C error during configuring USB hub slave. retrying...\n"); + if(++i2c_attempts >= MAX_I2C_ATTEMPTS){ + printf("ERROR: Maximum USB hub configuration attempts reached. Exiting now\n"); + return 1; + } + continue; + } + i2c_attempts = 0; /* reset error count */ + index += length; + data += length; + } + + puts("Done!\n"); + return 0; +} + +int usb_hub_reset(void) { + /* USB hub cannot be reset in software without resetting the ls1012a */ + return 1; +} |