Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 200 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/cyttsp_spi.c b/drivers/input/touchscreen/cyttsp_spi.c
new file mode 100644
index 00000000000..9f263410407
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp_spi.c
@@ -0,0 +1,200 @@
+/*
+ * 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");