Re: [PATCH] Input: cyttsp4 - use 16bit address for I2C/SPI communication
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: 2013-07-07 05:08:16
On Wed, Jul 03, 2013 at 11:36:20PM +0300, Ferruh Yigit wrote:
In TSG4, register map is 512bytes long and to access all of it, one bit from address byte is used (which bit to use differs for I2C and SPI); Since common code used for TSG3 and TSG4 for I2C, this parameter wrongly used as u8. TSG3 does not access beyond 255 bytes but TSG4 may. Signed-off-by: Ferruh Yigit <redacted> Tested-on: TMA3XX DVB && TMA4XX DVB
Applied, thank you.
quoted hunk ↗ jump to hunk
--- drivers/input/touchscreen/cyttsp4_core.h | 12 +++++----- drivers/input/touchscreen/cyttsp4_spi.c | 20 ++++++++--------- drivers/input/touchscreen/cyttsp_core.h | 8 +++---- drivers/input/touchscreen/cyttsp_i2c_common.c | 30 ++++++++++++++++++------- drivers/input/touchscreen/cyttsp_spi.c | 6 ++--- 5 files changed, 44 insertions(+), 32 deletions(-)diff --git a/drivers/input/touchscreen/cyttsp4_core.h b/drivers/input/touchscreen/cyttsp4_core.h index 86a2543..8e0d4d4 100644 --- a/drivers/input/touchscreen/cyttsp4_core.h +++ b/drivers/input/touchscreen/cyttsp4_core.h@@ -369,9 +369,9 @@ struct cyttsp4 { struct cyttsp4_bus_ops { u16 bustype; - int (*write)(struct device *dev, u8 *xfer_buf, u8 addr, u8 length, + int (*write)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length, const void *values); - int (*read)(struct device *dev, u8 *xfer_buf, u8 addr, u8 length, + int (*read)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length, void *values); };@@ -448,13 +448,13 @@ enum cyttsp4_event_id { /* y-axis, 0:origin is on top side of panel, 1: bottom */ #define CY_PCFG_ORIGIN_Y_MASK 0x80 -static inline int cyttsp4_adap_read(struct cyttsp4 *ts, u8 addr, int size, +static inline int cyttsp4_adap_read(struct cyttsp4 *ts, u16 addr, int size, void *buf) { return ts->bus_ops->read(ts->dev, ts->xfer_buf, addr, size, buf); } -static inline int cyttsp4_adap_write(struct cyttsp4 *ts, u8 addr, int size, +static inline int cyttsp4_adap_write(struct cyttsp4 *ts, u16 addr, int size, const void *buf) { return ts->bus_ops->write(ts->dev, ts->xfer_buf, addr, size, buf);@@ -463,9 +463,9 @@ static inline int cyttsp4_adap_write(struct cyttsp4 *ts, u8 addr, int size, extern struct cyttsp4 *cyttsp4_probe(const struct cyttsp4_bus_ops *ops, struct device *dev, u16 irq, size_t xfer_buf_size); extern int cyttsp4_remove(struct cyttsp4 *ts); -int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u8 addr, +int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u16 addr, u8 length, const void *values); -int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u8 addr, +int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u16 addr, u8 length, void *values); extern const struct dev_pm_ops cyttsp4_pm_ops;diff --git a/drivers/input/touchscreen/cyttsp4_spi.c b/drivers/input/touchscreen/cyttsp4_spi.c index f8f891b..a71e114 100644 --- a/drivers/input/touchscreen/cyttsp4_spi.c +++ b/drivers/input/touchscreen/cyttsp4_spi.c@@ -44,7 +44,7 @@ #define CY_SPI_DATA_BUF_SIZE (CY_SPI_CMD_BYTES + CY_SPI_DATA_SIZE) static int cyttsp_spi_xfer(struct device *dev, u8 *xfer_buf, - u8 op, u8 reg, u8 *buf, int length) + u8 op, u16 reg, u8 *buf, int length) { struct spi_device *spi = to_spi_device(dev); struct spi_message msg;@@ -63,14 +63,12 @@ static int cyttsp_spi_xfer(struct device *dev, u8 *xfer_buf, memset(wr_buf, 0, CY_SPI_DATA_BUF_SIZE); memset(rd_buf, 0, CY_SPI_CMD_BYTES); - if (reg > 255) - wr_buf[0] = op + CY_SPI_A8_BIT; - else - wr_buf[0] = op; - if (op == CY_SPI_WR_OP) - wr_buf[1] = reg % 256; - if (op == CY_SPI_WR_OP && length > 0) - memcpy(wr_buf + CY_SPI_CMD_BYTES, buf, length); + wr_buf[0] = op + (((reg >> 8) & 0x1) ? CY_SPI_A8_BIT : 0); + if (op == CY_SPI_WR_OP) { + wr_buf[1] = reg & 0xFF; + if (length > 0) + memcpy(wr_buf + CY_SPI_CMD_BYTES, buf, length); + } memset(xfer, 0, sizeof(xfer)); spi_message_init(&msg);@@ -130,7 +128,7 @@ static int cyttsp_spi_xfer(struct device *dev, u8 *xfer_buf, } static int cyttsp_spi_read_block_data(struct device *dev, u8 *xfer_buf, - u8 addr, u8 length, void *data) + u16 addr, u8 length, void *data) { int rc;@@ -143,7 +141,7 @@ static int cyttsp_spi_read_block_data(struct device *dev, u8 *xfer_buf, } static int cyttsp_spi_write_block_data(struct device *dev, u8 *xfer_buf, - u8 addr, u8 length, const void *data) + u16 addr, u8 length, const void *data) { return cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_WR_OP, addr, (void *)data, length);diff --git a/drivers/input/touchscreen/cyttsp_core.h b/drivers/input/touchscreen/cyttsp_core.h index 0cf564a..0707411 100644 --- a/drivers/input/touchscreen/cyttsp_core.h +++ b/drivers/input/touchscreen/cyttsp_core.h@@ -112,9 +112,9 @@ struct cyttsp; struct cyttsp_bus_ops { u16 bustype; - int (*write)(struct device *dev, u8 *xfer_buf, u8 addr, u8 length, + int (*write)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length, const void *values); - int (*read)(struct device *dev, u8 *xfer_buf, u8 addr, u8 length, + int (*read)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length, void *values); };@@ -145,9 +145,9 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops, struct device *dev, int irq, size_t xfer_buf_size); void cyttsp_remove(struct cyttsp *ts); -int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u8 addr, +int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u16 addr, u8 length, const void *values); -int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u8 addr, +int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u16 addr, u8 length, void *values); extern const struct dev_pm_ops cyttsp_pm_ops;diff --git a/drivers/input/touchscreen/cyttsp_i2c_common.c b/drivers/input/touchscreen/cyttsp_i2c_common.c index 07c553f..1d7b6f1 100644 --- a/drivers/input/touchscreen/cyttsp_i2c_common.c +++ b/drivers/input/touchscreen/cyttsp_i2c_common.c@@ -32,18 +32,20 @@ #include <linux/types.h> int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, - u8 addr, u8 length, void *values) + u16 addr, u8 length, void *values) { struct i2c_client *client = to_i2c_client(dev); + u8 client_addr = client->addr | ((addr >> 8) & 0x1); + u8 addr_lo = addr & 0xFF; struct i2c_msg msgs[] = { { - .addr = client->addr, + .addr = client_addr, .flags = 0, .len = 1, - .buf = &addr, + .buf = &addr_lo, }, { - .addr = client->addr, + .addr = client_addr, .flags = I2C_M_RD, .len = length, .buf = values,@@ -60,17 +62,29 @@ int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, EXPORT_SYMBOL_GPL(cyttsp_i2c_read_block_data); int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, - u8 addr, u8 length, const void *values) + u16 addr, u8 length, const void *values) { struct i2c_client *client = to_i2c_client(dev); + u8 client_addr = client->addr | ((addr >> 8) & 0x1); + u8 addr_lo = addr & 0xFF; + struct i2c_msg msgs[] = { + { + .addr = client_addr, + .flags = 0, + .len = length + 1, + .buf = xfer_buf, + }, + }; int retval; - xfer_buf[0] = addr; + xfer_buf[0] = addr_lo; memcpy(&xfer_buf[1], values, length); - retval = i2c_master_send(client, xfer_buf, length + 1); + retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); + if (retval < 0) + return retval; - return retval < 0 ? retval : 0; + return retval != ARRAY_SIZE(msgs) ? -EIO : 0; } EXPORT_SYMBOL_GPL(cyttsp_i2c_write_block_data);diff --git a/drivers/input/touchscreen/cyttsp_spi.c b/drivers/input/touchscreen/cyttsp_spi.c index 1df6253..4728bcb 100644 --- a/drivers/input/touchscreen/cyttsp_spi.c +++ b/drivers/input/touchscreen/cyttsp_spi.c@@ -41,7 +41,7 @@ #define CY_SPI_BITS_PER_WORD 8 static int cyttsp_spi_xfer(struct device *dev, u8 *xfer_buf, - u8 op, u8 reg, u8 *buf, int length) + u8 op, u16 reg, u8 *buf, int length) { struct spi_device *spi = to_spi_device(dev); struct spi_message msg;@@ -126,14 +126,14 @@ static int cyttsp_spi_xfer(struct device *dev, u8 *xfer_buf, } static int cyttsp_spi_read_block_data(struct device *dev, u8 *xfer_buf, - u8 addr, u8 length, void *data) + u16 addr, u8 length, void *data) { return cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_RD_OP, addr, data, length); } static int cyttsp_spi_write_block_data(struct device *dev, u8 *xfer_buf, - u8 addr, u8 length, const void *data) + u16 addr, u8 length, const void *data) { return cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_WR_OP, addr, (void *)data, length);-- 1.7.9.5
-- Dmitry