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path: root/drivers/net/wireless/ti/wlcore/spi.c
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Diffstat (limited to 'drivers/net/wireless/ti/wlcore/spi.c')
-rw-r--r--drivers/net/wireless/ti/wlcore/spi.c124
1 files changed, 105 insertions, 19 deletions
diff --git a/drivers/net/wireless/ti/wlcore/spi.c b/drivers/net/wireless/ti/wlcore/spi.c
index cea9443c2..6d2404088 100644
--- a/drivers/net/wireless/ti/wlcore/spi.c
+++ b/drivers/net/wireless/ti/wlcore/spi.c
@@ -70,16 +70,30 @@
#define WSPI_MAX_CHUNK_SIZE 4092
/*
- * only support SPI for 12xx - this code should be reworked when 18xx
- * support is introduced
+ * wl18xx driver aggregation buffer size is (13 * PAGE_SIZE) compared to
+ * (4 * PAGE_SIZE) for wl12xx, so use the larger buffer needed for wl18xx
*/
-#define SPI_AGGR_BUFFER_SIZE (4 * PAGE_SIZE)
+#define SPI_AGGR_BUFFER_SIZE (13 * PAGE_SIZE)
/* Maximum number of SPI write chunks */
#define WSPI_MAX_NUM_OF_CHUNKS \
((SPI_AGGR_BUFFER_SIZE / WSPI_MAX_CHUNK_SIZE) + 1)
+struct wilink_familiy_data {
+ char name[8];
+};
+
+const struct wilink_familiy_data *wilink_data;
+
+static const struct wilink_familiy_data wl18xx_data = {
+ .name = "wl18xx",
+};
+
+static const struct wilink_familiy_data wl12xx_data = {
+ .name = "wl12xx",
+};
+
struct wl12xx_spi_glue {
struct device *dev;
struct platform_device *core;
@@ -119,6 +133,7 @@ static void wl12xx_spi_init(struct device *child)
struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
struct spi_transfer t;
struct spi_message m;
+ struct spi_device *spi = to_spi_device(glue->dev);
u8 *cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
if (!cmd) {
@@ -151,6 +166,7 @@ static void wl12xx_spi_init(struct device *child)
cmd[6] |= WSPI_INIT_CMD_EN_FIXEDBUSY;
cmd[7] = crc7_be(0, cmd+2, WSPI_INIT_CMD_CRC_LEN) | WSPI_INIT_CMD_END;
+
/*
* The above is the logical order; it must actually be stored
* in the buffer byte-swapped.
@@ -163,6 +179,28 @@ static void wl12xx_spi_init(struct device *child)
spi_message_add_tail(&t, &m);
spi_sync(to_spi_device(glue->dev), &m);
+
+ /* Send extra clocks with inverted CS (high). this is required
+ * by the wilink family in order to successfully enter WSPI mode.
+ */
+ spi->mode ^= SPI_CS_HIGH;
+ memset(&m, 0, sizeof(m));
+ spi_message_init(&m);
+
+ cmd[0] = 0xff;
+ cmd[1] = 0xff;
+ cmd[2] = 0xff;
+ cmd[3] = 0xff;
+ __swab32s((u32 *)cmd);
+
+ t.tx_buf = cmd;
+ t.len = 4;
+ spi_message_add_tail(&t, &m);
+
+ spi_sync(to_spi_device(glue->dev), &m);
+
+ /* Restore chip select configration to normal */
+ spi->mode ^= SPI_CS_HIGH;
kfree(cmd);
}
@@ -270,22 +308,25 @@ static int __must_check wl12xx_spi_raw_read(struct device *child, int addr,
return 0;
}
-static int __must_check wl12xx_spi_raw_write(struct device *child, int addr,
- void *buf, size_t len, bool fixed)
+static int __wl12xx_spi_raw_write(struct device *child, int addr,
+ void *buf, size_t len, bool fixed)
{
struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
- /* SPI write buffers - 2 for each chunk */
- struct spi_transfer t[2 * WSPI_MAX_NUM_OF_CHUNKS];
+ struct spi_transfer *t;
struct spi_message m;
u32 commands[WSPI_MAX_NUM_OF_CHUNKS]; /* 1 command per chunk */
u32 *cmd;
u32 chunk_len;
int i;
+ /* SPI write buffers - 2 for each chunk */
+ t = kzalloc(sizeof(*t) * 2 * WSPI_MAX_NUM_OF_CHUNKS, GFP_KERNEL);
+ if (!t)
+ return -ENOMEM;
+
WARN_ON(len > SPI_AGGR_BUFFER_SIZE);
spi_message_init(&m);
- memset(t, 0, sizeof(t));
cmd = &commands[0];
i = 0;
@@ -318,9 +359,26 @@ static int __must_check wl12xx_spi_raw_write(struct device *child, int addr,
spi_sync(to_spi_device(glue->dev), &m);
+ kfree(t);
return 0;
}
+static int __must_check wl12xx_spi_raw_write(struct device *child, int addr,
+ void *buf, size_t len, bool fixed)
+{
+ int ret;
+
+ /* The ELP wakeup write may fail the first time due to internal
+ * hardware latency. It is safer to send the wakeup command twice to
+ * avoid unexpected failures.
+ */
+ if (addr == HW_ACCESS_ELP_CTRL_REG)
+ ret = __wl12xx_spi_raw_write(child, addr, buf, len, fixed);
+ ret = __wl12xx_spi_raw_write(child, addr, buf, len, fixed);
+
+ return ret;
+}
+
/**
* wl12xx_spi_set_power - power on/off the wl12xx unit
* @child: wl12xx device handle.
@@ -349,17 +407,38 @@ static int wl12xx_spi_set_power(struct device *child, bool enable)
return ret;
}
+/**
+ * wl12xx_spi_set_block_size
+ *
+ * This function is not needed for spi mode, but need to be present.
+ * Without it defined the wlcore fallback to use the wrong packet
+ * allignment on tx.
+ */
+static void wl12xx_spi_set_block_size(struct device *child,
+ unsigned int blksz)
+{
+}
+
static struct wl1271_if_operations spi_ops = {
.read = wl12xx_spi_raw_read,
.write = wl12xx_spi_raw_write,
.reset = wl12xx_spi_reset,
.init = wl12xx_spi_init,
.power = wl12xx_spi_set_power,
- .set_block_size = NULL,
+ .set_block_size = wl12xx_spi_set_block_size,
};
static const struct of_device_id wlcore_spi_of_match_table[] = {
- { .compatible = "ti,wl1271" },
+ { .compatible = "ti,wl1271", .data = &wl12xx_data},
+ { .compatible = "ti,wl1273", .data = &wl12xx_data},
+ { .compatible = "ti,wl1281", .data = &wl12xx_data},
+ { .compatible = "ti,wl1283", .data = &wl12xx_data},
+ { .compatible = "ti,wl1801", .data = &wl18xx_data},
+ { .compatible = "ti,wl1805", .data = &wl18xx_data},
+ { .compatible = "ti,wl1807", .data = &wl18xx_data},
+ { .compatible = "ti,wl1831", .data = &wl18xx_data},
+ { .compatible = "ti,wl1835", .data = &wl18xx_data},
+ { .compatible = "ti,wl1837", .data = &wl18xx_data},
{ }
};
MODULE_DEVICE_TABLE(of, wlcore_spi_of_match_table);
@@ -375,18 +454,24 @@ static int wlcore_probe_of(struct spi_device *spi, struct wl12xx_spi_glue *glue,
struct wlcore_platdev_data *pdev_data)
{
struct device_node *dt_node = spi->dev.of_node;
- int ret;
+ const struct of_device_id *of_id;
+
+ of_id = of_match_node(wlcore_spi_of_match_table, dt_node);
+ if (!of_id)
+ return -ENODEV;
+
+ wilink_data = of_id->data;
+ dev_info(&spi->dev, "selected chip familiy is %s\n",
+ wilink_data->name);
if (of_find_property(dt_node, "clock-xtal", NULL))
pdev_data->ref_clock_xtal = true;
- ret = of_property_read_u32(dt_node, "ref-clock-frequency",
- &pdev_data->ref_clock_freq);
- if (ret) {
- dev_err(glue->dev,
- "can't get reference clock frequency (%d)\n", ret);
- return ret;
- }
+ /* optional clock frequency params */
+ of_property_read_u32(dt_node, "ref-clock-frequency",
+ &pdev_data->ref_clock_freq);
+ of_property_read_u32(dt_node, "tcxo-clock-frequency",
+ &pdev_data->tcxo_clock_freq);
return 0;
}
@@ -437,7 +522,8 @@ static int wl1271_probe(struct spi_device *spi)
return ret;
}
- glue->core = platform_device_alloc("wl12xx", PLATFORM_DEVID_AUTO);
+ glue->core = platform_device_alloc(wilink_data->name,
+ PLATFORM_DEVID_AUTO);
if (!glue->core) {
dev_err(glue->dev, "can't allocate platform_device\n");
return -ENOMEM;