[PATCH v7 14/15] i2c: octeon,thunderx: Move register offsets to struct

Jan Glauber
2016-04-25T14:35:41Z

The register offsets are different between Octeon and ThunderX so move
them into the algorithm struct and get rid of the define.

Signed-off-by: Jan Glauber <jglauber@cavium.com>
---
drivers/i2c/busses/i2c-cavium.c | 28 +++++++++++++--------------
drivers/i2c/busses/i2c-cavium.h | 35 +++++++++++++++++-----------------
drivers/i2c/busses/i2c-octeon-core.c | 4 ++++
drivers/i2c/busses/i2c-thunderx-core.c | 4 ++++
4 files changed, 40 insertions(+), 31 deletions(-)

diff --git a/drivers/i2c/busses/i2c-cavium.c b/drivers/i2c/busses/i2c-cavium.c
index ac37ae1..6ac9d63 100644
--- a/drivers/i2c/busses/i2c-cavium.c
+++ b/drivers/i2c/busses/i2c-cavium.c
@@ -99,7 +99,7 @@ static int octeon_i2c_wait(struct octeon_i2c *i2c)

static bool octeon_i2c_hlc_test_valid(struct octeon_i2c *i2c)
{
- return (__raw_readq(i2c->twsi_base + SW_TWSI) & SW_TWSI_V) == 0;
+ return (__raw_readq(i2c->twsi_base + SW_TWSI(i2c)) & SW_TWSI_V) == 0;
}

static bool octeon_i2c_hlc_test_ready(struct octeon_i2c *i2c, bool *first)
@@ -443,12 +443,12 @@ static int octeon_i2c_hlc_read(struct octeon_i2c *i2c, struct i2c_msg *msgs)
else
cmd |= SW_TWSI_OP_7;

- octeon_i2c_writeq_flush(cmd, i2c->twsi_base + SW_TWSI);
+ octeon_i2c_writeq_flush(cmd, i2c->twsi_base + SW_TWSI(i2c));
ret = octeon_i2c_hlc_wait(i2c);
if (ret)
goto err;

- cmd = __raw_readq(i2c->twsi_base + SW_TWSI);
+ cmd = __raw_readq(i2c->twsi_base + SW_TWSI(i2c));
if ((cmd & SW_TWSI_R) == 0)
return -EAGAIN;

@@ -456,7 +456,7 @@ static int octeon_i2c_hlc_read(struct octeon_i2c *i2c, struct i2c_msg *msgs)
msgs[0].buf[j] = (cmd >> (8 * i)) & 0xff;

if (msgs[0].len > 4) {
- cmd = __raw_readq(i2c->twsi_base + SW_TWSI_EXT);
+ cmd = __raw_readq(i2c->twsi_base + SW_TWSI_EXT(i2c));
for (i = 0; i < msgs[0].len - 4 && i < 4; i++, j--)
msgs[0].buf[j] = (cmd >> (8 * i)) & 0xff;
}
@@ -493,15 +493,15 @@ static int octeon_i2c_hlc_write(struct octeon_i2c *i2c, struct i2c_msg *msgs)

for (i = 0; i < msgs[0].len - 4 && i < 4; i++, j--)
ext |= (u64) msgs[0].buf[j] << (8 * i);
- octeon_i2c_writeq_flush(ext, i2c->twsi_base + SW_TWSI_EXT);
+ octeon_i2c_writeq_flush(ext, i2c->twsi_base + SW_TWSI_EXT(i2c));
}

- octeon_i2c_writeq_flush(cmd, i2c->twsi_base + SW_TWSI);
+ octeon_i2c_writeq_flush(cmd, i2c->twsi_base + SW_TWSI(i2c));
ret = octeon_i2c_hlc_wait(i2c);
if (ret)
goto err;

- cmd = __raw_readq(i2c->twsi_base + SW_TWSI);
+ cmd = __raw_readq(i2c->twsi_base + SW_TWSI(i2c));
if ((cmd & SW_TWSI_R) == 0)
return -EAGAIN;

@@ -536,18 +536,18 @@ static int octeon_i2c_hlc_comp_read(struct octeon_i2c *i2c, struct i2c_msg *msgs
cmd |= SW_TWSI_EIA;
ext = (u64) msgs[0].buf[0] << SW_TWSI_IA_SHIFT;
cmd |= (u64) msgs[0].buf[1] << SW_TWSI_IA_SHIFT;
- octeon_i2c_writeq_flush(ext, i2c->twsi_base + SW_TWSI_EXT);
+ octeon_i2c_writeq_flush(ext, i2c->twsi_base + SW_TWSI_EXT(i2c));
} else
cmd |= (u64) msgs[0].buf[0] << SW_TWSI_IA_SHIFT;

octeon_i2c_hlc_int_clear(i2c);
- octeon_i2c_writeq_flush(cmd, i2c->twsi_base + SW_TWSI);
+ octeon_i2c_writeq_flush(cmd, i2c->twsi_base + SW_TWSI(i2c));

ret = octeon_i2c_hlc_wait(i2c);
if (ret)
goto err;

- cmd = __raw_readq(i2c->twsi_base + SW_TWSI);
+ cmd = __raw_readq(i2c->twsi_base + SW_TWSI(i2c));
if ((cmd & SW_TWSI_R) == 0)
return -EAGAIN;

@@ -555,7 +555,7 @@ static int octeon_i2c_hlc_comp_read(struct octeon_i2c *i2c, struct i2c_msg *msgs
msgs[1].buf[j] = (cmd >> (8 * i)) & 0xff;

if (msgs[1].len > 4) {
- cmd = __raw_readq(i2c->twsi_base + SW_TWSI_EXT);
+ cmd = __raw_readq(i2c->twsi_base + SW_TWSI_EXT(i2c));
for (i = 0; i < msgs[1].len - 4 && i < 4; i++, j--)
msgs[1].buf[j] = (cmd >> (8 * i)) & 0xff;
}
@@ -601,16 +601,16 @@ static int octeon_i2c_hlc_comp_write(struct octeon_i2c *i2c, struct i2c_msg *msg
set_ext = true;
}
if (set_ext)
- octeon_i2c_writeq_flush(ext, i2c->twsi_base + SW_TWSI_EXT);
+ octeon_i2c_writeq_flush(ext, i2c->twsi_base + SW_TWSI_EXT(i2c));

octeon_i2c_hlc_int_clear(i2c);
- octeon_i2c_writeq_flush(cmd, i2c->twsi_base + SW_TWSI);
+ octeon_i2c_writeq_flush(cmd, i2c->twsi_base + SW_TWSI(i2c));

ret = octeon_i2c_hlc_wait(i2c);
if (ret)
goto err;

- cmd = __raw_readq(i2c->twsi_base + SW_TWSI);
+ cmd = __raw_readq(i2c->twsi_base + SW_TWSI(i2c));
if ((cmd & SW_TWSI_R) == 0)
return -EAGAIN;

diff --git a/drivers/i2c/busses/i2c-cavium.h b/drivers/i2c/busses/i2c-cavium.h
index 33c7e1f..ad57b03 100644
--- a/drivers/i2c/busses/i2c-cavium.h
+++ b/drivers/i2c/busses/i2c-cavium.h
@@ -7,17 +7,6 @@
#include <linux/kernel.h>
#include <linux/pci.h>

-/* Register offsets */
-#if IS_ENABLED(CONFIG_I2C_THUNDERX)
- #define SW_TWSI 0x1000
- #define TWSI_INT 0x1010
- #define SW_TWSI_EXT 0x1018
-#else
- #define SW_TWSI 0x00
- #define TWSI_INT 0x10
- #define SW_TWSI_EXT 0x18
-#endif
-
/* Controller command patterns */
#define SW_TWSI_V BIT_ULL(63) /* Valid bit */
#define SW_TWSI_EIA BIT_ULL(61) /* Extended internal address */
@@ -97,9 +86,21 @@

#define I2C_OCTEON_EVENT_WAIT 80 /* microseconds */

+/* Register offsets */
+struct octeon_i2c_reg_offset {
+ unsigned int sw_twsi;
+ unsigned int twsi_int;
+ unsigned int sw_twsi_ext;
+};
+
+#define SW_TWSI(x) (x->roff.sw_twsi)
+#define TWSI_INT(x) (x->roff.twsi_int)
+#define SW_TWSI_EXT(x) (x->roff.sw_twsi_ext)
+
struct octeon_i2c {
wait_queue_head_t queue;
struct i2c_adapter adap;
+ struct octeon_i2c_reg_offset roff;
struct clk *clk;
int irq;
int hlc_irq; /* For cn7890 only */
@@ -139,9 +140,9 @@ static inline void octeon_i2c_reg_write(struct octeon_i2c *i2c, u64 eop_reg, u8
{
u64 tmp;

- __raw_writeq(SW_TWSI_V | eop_reg | data, i2c->twsi_base + SW_TWSI);
+ __raw_writeq(SW_TWSI_V | eop_reg | data, i2c->twsi_base + SW_TWSI(i2c));
do {
- tmp = __raw_readq(i2c->twsi_base + SW_TWSI);
+ tmp = __raw_readq(i2c->twsi_base + SW_TWSI(i2c));
} while ((tmp & SW_TWSI_V) != 0);
}

@@ -163,9 +164,9 @@ static inline u8 octeon_i2c_reg_read(struct octeon_i2c *i2c, u64 eop_reg)
{
u64 tmp;

- __raw_writeq(SW_TWSI_V | eop_reg | SW_TWSI_R, i2c->twsi_base + SW_TWSI);
+ __raw_writeq(SW_TWSI_V | eop_reg | SW_TWSI_R, i2c->twsi_base + SW_TWSI(i2c));
do {
- tmp = __raw_readq(i2c->twsi_base + SW_TWSI);
+ tmp = __raw_readq(i2c->twsi_base + SW_TWSI(i2c));
} while ((tmp & SW_TWSI_V) != 0);

return tmp & 0xFF;
@@ -186,7 +187,7 @@ static inline u8 octeon_i2c_reg_read(struct octeon_i2c *i2c, u64 eop_reg)
*/
static inline u64 octeon_i2c_read_int(struct octeon_i2c *i2c)
{
- return __raw_readq(i2c->twsi_base + TWSI_INT);
+ return __raw_readq(i2c->twsi_base + TWSI_INT(i2c));
}

/**
@@ -196,7 +197,7 @@ static inline u64 octeon_i2c_read_int(struct octeon_i2c *i2c)
*/
static inline void octeon_i2c_write_int(struct octeon_i2c *i2c, u64 data)
{
- octeon_i2c_writeq_flush(data, i2c->twsi_base + TWSI_INT);
+ octeon_i2c_writeq_flush(data, i2c->twsi_base + TWSI_INT(i2c));
}

/* Prototypes */
diff --git a/drivers/i2c/busses/i2c-octeon-core.c b/drivers/i2c/busses/i2c-octeon-core.c
index fec4306..038007d 100644
--- a/drivers/i2c/busses/i2c-octeon-core.c
+++ b/drivers/i2c/busses/i2c-octeon-core.c
@@ -163,6 +163,10 @@ static int octeon_i2c_probe(struct platform_device *pdev)
}
i2c->dev = &pdev->dev;

+ i2c->roff.sw_twsi = 0x00;
+ i2c->roff.twsi_int = 0x10;
+ i2c->roff.sw_twsi_ext = 0x18;
+
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
i2c->twsi_base = devm_ioremap_resource(&pdev->dev, res_mem);
if (IS_ERR(i2c->twsi_base)) {
diff --git a/drivers/i2c/busses/i2c-thunderx-core.c b/drivers/i2c/busses/i2c-thunderx-core.c
index 656b405..8fcd26c 100644
--- a/drivers/i2c/busses/i2c-thunderx-core.c
+++ b/drivers/i2c/busses/i2c-thunderx-core.c
@@ -134,6 +134,10 @@ static int thunder_i2c_probe_pci(struct pci_dev *pdev,
if (!i2c)
return -ENOMEM;

+ i2c->roff.sw_twsi = 0x1000;
+ i2c->roff.twsi_int = 0x1010;
+ i2c->roff.sw_twsi_ext = 0x1018;
+
i2c->dev = dev;
pci_set_drvdata(pdev, i2c);
ret = pci_enable_device(pdev);
--
1.9.1