diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/input/touchscreen/cyttsp_spi.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/input/touchscreen/cyttsp_spi.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/ANDROID_3.4.5/drivers/input/touchscreen/cyttsp_spi.c b/ANDROID_3.4.5/drivers/input/touchscreen/cyttsp_spi.c deleted file mode 100644 index 9f263410..00000000 --- a/ANDROID_3.4.5/drivers/input/touchscreen/cyttsp_spi.c +++ /dev/null @@ -1,200 +0,0 @@ -/* - * Source for: - * Cypress TrueTouch(TM) Standard Product (TTSP) SPI touchscreen driver. - * For use with Cypress Txx3xx parts. - * Supported parts include: - * CY8CTST341 - * CY8CTMA340 - * - * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc. - * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2, and only version 2, as published by the - * Free Software Foundation. - * - * 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. - * - * Contact Cypress Semiconductor at www.cypress.com <kev@cypress.com> - * - */ - -#include "cyttsp_core.h" - -#include <linux/delay.h> -#include <linux/input.h> -#include <linux/spi/spi.h> - -#define CY_SPI_WR_OP 0x00 /* r/~w */ -#define CY_SPI_RD_OP 0x01 -#define CY_SPI_CMD_BYTES 4 -#define CY_SPI_SYNC_BYTE 2 -#define CY_SPI_SYNC_ACK1 0x62 /* from protocol v.2 */ -#define CY_SPI_SYNC_ACK2 0x9D /* from protocol v.2 */ -#define CY_SPI_DATA_SIZE 128 -#define CY_SPI_DATA_BUF_SIZE (CY_SPI_CMD_BYTES + CY_SPI_DATA_SIZE) -#define CY_SPI_BITS_PER_WORD 8 - -static int cyttsp_spi_xfer(struct cyttsp *ts, - u8 op, u8 reg, u8 *buf, int length) -{ - struct spi_device *spi = to_spi_device(ts->dev); - struct spi_message msg; - struct spi_transfer xfer[2]; - u8 *wr_buf = &ts->xfer_buf[0]; - u8 *rd_buf = &ts->xfer_buf[CY_SPI_DATA_BUF_SIZE]; - int retval; - int i; - - if (length > CY_SPI_DATA_SIZE) { - dev_err(ts->dev, "%s: length %d is too big.\n", - __func__, length); - return -EINVAL; - } - - memset(wr_buf, 0, CY_SPI_DATA_BUF_SIZE); - memset(rd_buf, 0, CY_SPI_DATA_BUF_SIZE); - - wr_buf[0] = 0x00; /* header byte 0 */ - wr_buf[1] = 0xFF; /* header byte 1 */ - wr_buf[2] = reg; /* reg index */ - wr_buf[3] = op; /* r/~w */ - if (op == CY_SPI_WR_OP) - memcpy(wr_buf + CY_SPI_CMD_BYTES, buf, length); - - memset(xfer, 0, sizeof(xfer)); - spi_message_init(&msg); - - /* - We set both TX and RX buffers because Cypress TTSP - requires full duplex operation. - */ - xfer[0].tx_buf = wr_buf; - xfer[0].rx_buf = rd_buf; - switch (op) { - case CY_SPI_WR_OP: - xfer[0].len = length + CY_SPI_CMD_BYTES; - spi_message_add_tail(&xfer[0], &msg); - break; - - case CY_SPI_RD_OP: - xfer[0].len = CY_SPI_CMD_BYTES; - spi_message_add_tail(&xfer[0], &msg); - - xfer[1].rx_buf = buf; - xfer[1].len = length; - spi_message_add_tail(&xfer[1], &msg); - break; - - default: - dev_err(ts->dev, "%s: bad operation code=%d\n", __func__, op); - return -EINVAL; - } - - retval = spi_sync(spi, &msg); - if (retval < 0) { - dev_dbg(ts->dev, "%s: spi_sync() error %d, len=%d, op=%d\n", - __func__, retval, xfer[1].len, op); - - /* - * do not return here since was a bad ACK sequence - * let the following ACK check handle any errors and - * allow silent retries - */ - } - - if (rd_buf[CY_SPI_SYNC_BYTE] != CY_SPI_SYNC_ACK1 || - rd_buf[CY_SPI_SYNC_BYTE + 1] != CY_SPI_SYNC_ACK2) { - - dev_dbg(ts->dev, "%s: operation %d failed\n", __func__, op); - - for (i = 0; i < CY_SPI_CMD_BYTES; i++) - dev_dbg(ts->dev, "%s: test rd_buf[%d]:0x%02x\n", - __func__, i, rd_buf[i]); - for (i = 0; i < length; i++) - dev_dbg(ts->dev, "%s: test buf[%d]:0x%02x\n", - __func__, i, buf[i]); - - return -EIO; - } - - return 0; -} - -static int cyttsp_spi_read_block_data(struct cyttsp *ts, - u8 addr, u8 length, void *data) -{ - return cyttsp_spi_xfer(ts, CY_SPI_RD_OP, addr, data, length); -} - -static int cyttsp_spi_write_block_data(struct cyttsp *ts, - u8 addr, u8 length, const void *data) -{ - return cyttsp_spi_xfer(ts, CY_SPI_WR_OP, addr, (void *)data, length); -} - -static const struct cyttsp_bus_ops cyttsp_spi_bus_ops = { - .bustype = BUS_SPI, - .write = cyttsp_spi_write_block_data, - .read = cyttsp_spi_read_block_data, -}; - -static int __devinit cyttsp_spi_probe(struct spi_device *spi) -{ - struct cyttsp *ts; - int error; - - /* Set up SPI*/ - spi->bits_per_word = CY_SPI_BITS_PER_WORD; - spi->mode = SPI_MODE_0; - error = spi_setup(spi); - if (error < 0) { - dev_err(&spi->dev, "%s: SPI setup error %d\n", - __func__, error); - return error; - } - - ts = cyttsp_probe(&cyttsp_spi_bus_ops, &spi->dev, spi->irq, - CY_SPI_DATA_BUF_SIZE * 2); - if (IS_ERR(ts)) - return PTR_ERR(ts); - - spi_set_drvdata(spi, ts); - - return 0; -} - -static int __devexit cyttsp_spi_remove(struct spi_device *spi) -{ - struct cyttsp *ts = spi_get_drvdata(spi); - - cyttsp_remove(ts); - - return 0; -} - -static struct spi_driver cyttsp_spi_driver = { - .driver = { - .name = CY_SPI_NAME, - .owner = THIS_MODULE, - .pm = &cyttsp_pm_ops, - }, - .probe = cyttsp_spi_probe, - .remove = __devexit_p(cyttsp_spi_remove), -}; - -module_spi_driver(cyttsp_spi_driver); - -MODULE_ALIAS("spi:cyttsp"); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) SPI driver"); -MODULE_AUTHOR("Cypress"); -MODULE_ALIAS("spi:cyttsp"); |