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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, 59 insertions, 65 deletions
diff --git a/drivers/net/wireless/ti/wlcore/spi.c b/drivers/net/wireless/ti/wlcore/spi.c
index 553cd3cbb98..392c882b28f 100644
--- a/drivers/net/wireless/ti/wlcore/spi.c
+++ b/drivers/net/wireless/ti/wlcore/spi.c
@@ -24,11 +24,12 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/swab.h>
#include <linux/crc7.h>
#include <linux/spi/spi.h>
#include <linux/wl12xx.h>
#include <linux/platform_device.h>
-#include <linux/slab.h>
#include "wlcore.h"
#include "wl12xx_80211.h"
@@ -66,7 +67,13 @@
/* HW limitation: maximum possible chunk size is 4095 bytes */
#define WSPI_MAX_CHUNK_SIZE 4092
-#define WSPI_MAX_NUM_OF_CHUNKS (WL1271_AGGR_BUFFER_SIZE / WSPI_MAX_CHUNK_SIZE)
+/*
+ * only support SPI for 12xx - this code should be reworked when 18xx
+ * support is introduced
+ */
+#define SPI_AGGR_BUFFER_SIZE (4 * PAGE_SIZE)
+
+#define WSPI_MAX_NUM_OF_CHUNKS (SPI_AGGR_BUFFER_SIZE / WSPI_MAX_CHUNK_SIZE)
struct wl12xx_spi_glue {
struct device *dev;
@@ -104,18 +111,16 @@ static void wl12xx_spi_reset(struct device *child)
static void wl12xx_spi_init(struct device *child)
{
struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
- u8 crc[WSPI_INIT_CMD_CRC_LEN], *cmd;
struct spi_transfer t;
struct spi_message m;
+ u8 *cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
- cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
if (!cmd) {
dev_err(child->parent,
"could not allocate cmd for spi init\n");
return;
}
- memset(crc, 0, sizeof(crc));
memset(&t, 0, sizeof(t));
spi_message_init(&m);
@@ -123,30 +128,29 @@ static void wl12xx_spi_init(struct device *child)
* Set WSPI_INIT_COMMAND
* the data is being send from the MSB to LSB
*/
- cmd[2] = 0xff;
- cmd[3] = 0xff;
- cmd[1] = WSPI_INIT_CMD_START | WSPI_INIT_CMD_TX;
- cmd[0] = 0;
- cmd[7] = 0;
- cmd[6] |= HW_ACCESS_WSPI_INIT_CMD_MASK << 3;
- cmd[6] |= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN;
+ cmd[0] = 0xff;
+ cmd[1] = 0xff;
+ cmd[2] = WSPI_INIT_CMD_START | WSPI_INIT_CMD_TX;
+ cmd[3] = 0;
+ cmd[4] = 0;
+ cmd[5] = HW_ACCESS_WSPI_INIT_CMD_MASK << 3;
+ cmd[5] |= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN;
+
+ cmd[6] = WSPI_INIT_CMD_IOD | WSPI_INIT_CMD_IP | WSPI_INIT_CMD_CS
+ | WSPI_INIT_CMD_WSPI | WSPI_INIT_CMD_WS;
if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0)
- cmd[5] |= WSPI_INIT_CMD_DIS_FIXEDBUSY;
+ cmd[6] |= WSPI_INIT_CMD_DIS_FIXEDBUSY;
else
- cmd[5] |= WSPI_INIT_CMD_EN_FIXEDBUSY;
+ cmd[6] |= WSPI_INIT_CMD_EN_FIXEDBUSY;
- cmd[5] |= WSPI_INIT_CMD_IOD | WSPI_INIT_CMD_IP | WSPI_INIT_CMD_CS
- | WSPI_INIT_CMD_WSPI | WSPI_INIT_CMD_WS;
-
- crc[0] = cmd[1];
- crc[1] = cmd[0];
- crc[2] = cmd[7];
- crc[3] = cmd[6];
- crc[4] = cmd[5];
-
- cmd[4] |= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1;
- cmd[4] |= WSPI_INIT_CMD_END;
+ 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.
+ */
+ __swab32s((u32 *)cmd);
+ __swab32s((u32 *)cmd+1);
t.tx_buf = cmd;
t.len = WSPI_INIT_CMD_LEN;
@@ -193,8 +197,8 @@ static int wl12xx_spi_read_busy(struct device *child)
return -ETIMEDOUT;
}
-static void wl12xx_spi_raw_read(struct device *child, int addr, void *buf,
- size_t len, bool fixed)
+static int __must_check wl12xx_spi_raw_read(struct device *child, int addr,
+ void *buf, size_t len, bool fixed)
{
struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
struct wl1271 *wl = dev_get_drvdata(child);
@@ -205,7 +209,7 @@ static void wl12xx_spi_raw_read(struct device *child, int addr, void *buf,
u32 chunk_len;
while (len > 0) {
- chunk_len = min((size_t)WSPI_MAX_CHUNK_SIZE, len);
+ chunk_len = min_t(size_t, WSPI_MAX_CHUNK_SIZE, len);
cmd = &wl->buffer_cmd;
busy_buf = wl->buffer_busyword;
@@ -238,7 +242,7 @@ static void wl12xx_spi_raw_read(struct device *child, int addr, void *buf,
if (!(busy_buf[WL1271_BUSY_WORD_CNT - 1] & 0x1) &&
wl12xx_spi_read_busy(child)) {
memset(buf, 0, chunk_len);
- return;
+ return 0;
}
spi_message_init(&m);
@@ -256,20 +260,22 @@ static void wl12xx_spi_raw_read(struct device *child, int addr, void *buf,
buf += chunk_len;
len -= chunk_len;
}
+
+ return 0;
}
-static void wl12xx_spi_raw_write(struct device *child, int addr, void *buf,
- size_t len, bool fixed)
+static int __must_check 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);
- struct spi_transfer t[2 * WSPI_MAX_NUM_OF_CHUNKS];
+ struct spi_transfer t[2 * (WSPI_MAX_NUM_OF_CHUNKS + 1)];
struct spi_message m;
u32 commands[WSPI_MAX_NUM_OF_CHUNKS];
u32 *cmd;
u32 chunk_len;
int i;
- WARN_ON(len > WL1271_AGGR_BUFFER_SIZE);
+ WARN_ON(len > SPI_AGGR_BUFFER_SIZE);
spi_message_init(&m);
memset(t, 0, sizeof(t));
@@ -277,7 +283,7 @@ static void wl12xx_spi_raw_write(struct device *child, int addr, void *buf,
cmd = &commands[0];
i = 0;
while (len > 0) {
- chunk_len = min((size_t)WSPI_MAX_CHUNK_SIZE, len);
+ chunk_len = min_t(size_t, WSPI_MAX_CHUNK_SIZE, len);
*cmd = 0;
*cmd |= WSPI_CMD_WRITE;
@@ -304,6 +310,8 @@ static void wl12xx_spi_raw_write(struct device *child, int addr, void *buf,
}
spi_sync(to_spi_device(glue->dev), &m);
+
+ return 0;
}
static struct wl1271_if_operations spi_ops = {
@@ -314,20 +322,23 @@ static struct wl1271_if_operations spi_ops = {
.set_block_size = NULL,
};
-static int __devinit wl1271_probe(struct spi_device *spi)
+static int wl1271_probe(struct spi_device *spi)
{
struct wl12xx_spi_glue *glue;
- struct wl12xx_platform_data *pdata;
+ struct wlcore_platdev_data pdev_data;
struct resource res[1];
int ret = -ENOMEM;
- pdata = spi->dev.platform_data;
- if (!pdata) {
+ memset(&pdev_data, 0x00, sizeof(pdev_data));
+
+ pdev_data.pdata = dev_get_platdata(&spi->dev);
+ if (!pdev_data.pdata) {
dev_err(&spi->dev, "no platform data\n");
- return -ENODEV;
+ ret = -ENODEV;
+ goto out;
}
- pdata->ops = &spi_ops;
+ pdev_data.if_ops = &spi_ops;
glue = kzalloc(sizeof(*glue), GFP_KERNEL);
if (!glue) {
@@ -349,7 +360,7 @@ static int __devinit wl1271_probe(struct spi_device *spi)
goto out_free_glue;
}
- glue->core = platform_device_alloc("wl12xx", -1);
+ glue->core = platform_device_alloc("wl12xx", PLATFORM_DEVID_AUTO);
if (!glue->core) {
dev_err(glue->dev, "can't allocate platform_device\n");
ret = -ENOMEM;
@@ -370,7 +381,8 @@ static int __devinit wl1271_probe(struct spi_device *spi)
goto out_dev_put;
}
- ret = platform_device_add_data(glue->core, pdata, sizeof(*pdata));
+ ret = platform_device_add_data(glue->core, &pdev_data,
+ sizeof(pdev_data));
if (ret) {
dev_err(glue->dev, "can't add platform data\n");
goto out_dev_put;
@@ -389,16 +401,16 @@ out_dev_put:
out_free_glue:
kfree(glue);
+
out:
return ret;
}
-static int __devexit wl1271_remove(struct spi_device *spi)
+static int wl1271_remove(struct spi_device *spi)
{
struct wl12xx_spi_glue *glue = spi_get_drvdata(spi);
- platform_device_del(glue->core);
- platform_device_put(glue->core);
+ platform_device_unregister(glue->core);
kfree(glue);
return 0;
@@ -412,29 +424,11 @@ static struct spi_driver wl1271_spi_driver = {
},
.probe = wl1271_probe,
- .remove = __devexit_p(wl1271_remove),
+ .remove = wl1271_remove,
};
-static int __init wl1271_init(void)
-{
- return spi_register_driver(&wl1271_spi_driver);
-}
-
-static void __exit wl1271_exit(void)
-{
- spi_unregister_driver(&wl1271_spi_driver);
-}
-
-module_init(wl1271_init);
-module_exit(wl1271_exit);
-
+module_spi_driver(wl1271_spi_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
-MODULE_FIRMWARE(WL127X_FW_NAME_SINGLE);
-MODULE_FIRMWARE(WL127X_FW_NAME_MULTI);
-MODULE_FIRMWARE(WL127X_PLT_FW_NAME);
-MODULE_FIRMWARE(WL128X_FW_NAME_SINGLE);
-MODULE_FIRMWARE(WL128X_FW_NAME_MULTI);
-MODULE_FIRMWARE(WL128X_PLT_FW_NAME);
MODULE_ALIAS("spi:wl1271");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 13:12:35 +0000