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path: root/drivers/net/wireless/wl12xx/wl1271_spi.c
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Diffstat (limited to 'drivers/net/wireless/wl12xx/wl1271_spi.c')
-rw-r--r--drivers/net/wireless/wl12xx/wl1271_spi.c151
1 files changed, 93 insertions, 58 deletions
diff --git a/drivers/net/wireless/wl12xx/wl1271_spi.c b/drivers/net/wireless/wl12xx/wl1271_spi.c
index 4cb99c541e2a..ef801680773f 100644
--- a/drivers/net/wireless/wl12xx/wl1271_spi.c
+++ b/drivers/net/wireless/wl12xx/wl1271_spi.c
@@ -25,7 +25,7 @@
#include <linux/module.h>
#include <linux/crc7.h>
#include <linux/spi/spi.h>
-#include <linux/spi/wl12xx.h>
+#include <linux/wl12xx.h>
#include <linux/slab.h>
#include "wl1271.h"
@@ -63,6 +63,11 @@
((WL1271_BUSY_WORD_LEN - 4) / sizeof(u32))
#define HW_ACCESS_WSPI_INIT_CMD_MASK 0
+/* 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)
+
static inline struct spi_device *wl_to_spi(struct wl1271 *wl)
{
return wl->if_priv;
@@ -202,90 +207,117 @@ static int wl1271_spi_read_busy(struct wl1271 *wl)
static void wl1271_spi_raw_read(struct wl1271 *wl, int addr, void *buf,
size_t len, bool fixed)
{
- struct spi_transfer t[3];
+ struct spi_transfer t[2];
struct spi_message m;
u32 *busy_buf;
u32 *cmd;
+ u32 chunk_len;
- cmd = &wl->buffer_cmd;
- busy_buf = wl->buffer_busyword;
+ while (len > 0) {
+ chunk_len = min((size_t)WSPI_MAX_CHUNK_SIZE, len);
- *cmd = 0;
- *cmd |= WSPI_CMD_READ;
- *cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
- *cmd |= addr & WSPI_CMD_BYTE_ADDR;
+ cmd = &wl->buffer_cmd;
+ busy_buf = wl->buffer_busyword;
- if (fixed)
- *cmd |= WSPI_CMD_FIXED;
+ *cmd = 0;
+ *cmd |= WSPI_CMD_READ;
+ *cmd |= (chunk_len << WSPI_CMD_BYTE_LENGTH_OFFSET) &
+ WSPI_CMD_BYTE_LENGTH;
+ *cmd |= addr & WSPI_CMD_BYTE_ADDR;
- spi_message_init(&m);
- memset(t, 0, sizeof(t));
+ if (fixed)
+ *cmd |= WSPI_CMD_FIXED;
- t[0].tx_buf = cmd;
- t[0].len = 4;
- t[0].cs_change = true;
- spi_message_add_tail(&t[0], &m);
+ spi_message_init(&m);
+ memset(t, 0, sizeof(t));
- /* Busy and non busy words read */
- t[1].rx_buf = busy_buf;
- t[1].len = WL1271_BUSY_WORD_LEN;
- t[1].cs_change = true;
- spi_message_add_tail(&t[1], &m);
+ t[0].tx_buf = cmd;
+ t[0].len = 4;
+ t[0].cs_change = true;
+ spi_message_add_tail(&t[0], &m);
- spi_sync(wl_to_spi(wl), &m);
+ /* Busy and non busy words read */
+ t[1].rx_buf = busy_buf;
+ t[1].len = WL1271_BUSY_WORD_LEN;
+ t[1].cs_change = true;
+ spi_message_add_tail(&t[1], &m);
- if (!(busy_buf[WL1271_BUSY_WORD_CNT - 1] & 0x1) &&
- wl1271_spi_read_busy(wl)) {
- memset(buf, 0, len);
- return;
- }
+ spi_sync(wl_to_spi(wl), &m);
- spi_message_init(&m);
- memset(t, 0, sizeof(t));
+ if (!(busy_buf[WL1271_BUSY_WORD_CNT - 1] & 0x1) &&
+ wl1271_spi_read_busy(wl)) {
+ memset(buf, 0, chunk_len);
+ return;
+ }
- t[0].rx_buf = buf;
- t[0].len = len;
- t[0].cs_change = true;
- spi_message_add_tail(&t[0], &m);
+ spi_message_init(&m);
+ memset(t, 0, sizeof(t));
- spi_sync(wl_to_spi(wl), &m);
+ t[0].rx_buf = buf;
+ t[0].len = chunk_len;
+ t[0].cs_change = true;
+ spi_message_add_tail(&t[0], &m);
- wl1271_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd));
- wl1271_dump(DEBUG_SPI, "spi_read buf <- ", buf, len);
+ spi_sync(wl_to_spi(wl), &m);
+
+ wl1271_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd));
+ wl1271_dump(DEBUG_SPI, "spi_read buf <- ", buf, chunk_len);
+
+ if (!fixed)
+ addr += chunk_len;
+ buf += chunk_len;
+ len -= chunk_len;
+ }
}
static void wl1271_spi_raw_write(struct wl1271 *wl, int addr, void *buf,
size_t len, bool fixed)
{
- struct spi_transfer t[2];
+ struct spi_transfer t[2 * WSPI_MAX_NUM_OF_CHUNKS];
struct spi_message m;
+ u32 commands[WSPI_MAX_NUM_OF_CHUNKS];
u32 *cmd;
+ u32 chunk_len;
+ int i;
- cmd = &wl->buffer_cmd;
-
- *cmd = 0;
- *cmd |= WSPI_CMD_WRITE;
- *cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
- *cmd |= addr & WSPI_CMD_BYTE_ADDR;
-
- if (fixed)
- *cmd |= WSPI_CMD_FIXED;
+ WARN_ON(len > WL1271_AGGR_BUFFER_SIZE);
spi_message_init(&m);
memset(t, 0, sizeof(t));
- t[0].tx_buf = cmd;
- t[0].len = sizeof(*cmd);
- spi_message_add_tail(&t[0], &m);
+ cmd = &commands[0];
+ i = 0;
+ while (len > 0) {
+ chunk_len = min((size_t)WSPI_MAX_CHUNK_SIZE, len);
- t[1].tx_buf = buf;
- t[1].len = len;
- spi_message_add_tail(&t[1], &m);
+ *cmd = 0;
+ *cmd |= WSPI_CMD_WRITE;
+ *cmd |= (chunk_len << WSPI_CMD_BYTE_LENGTH_OFFSET) &
+ WSPI_CMD_BYTE_LENGTH;
+ *cmd |= addr & WSPI_CMD_BYTE_ADDR;
- spi_sync(wl_to_spi(wl), &m);
+ if (fixed)
+ *cmd |= WSPI_CMD_FIXED;
+
+ t[i].tx_buf = cmd;
+ t[i].len = sizeof(*cmd);
+ spi_message_add_tail(&t[i++], &m);
+
+ t[i].tx_buf = buf;
+ t[i].len = chunk_len;
+ spi_message_add_tail(&t[i++], &m);
- wl1271_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd));
- wl1271_dump(DEBUG_SPI, "spi_write buf -> ", buf, len);
+ wl1271_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd));
+ wl1271_dump(DEBUG_SPI, "spi_write buf -> ", buf, chunk_len);
+
+ if (!fixed)
+ addr += chunk_len;
+ buf += chunk_len;
+ len -= chunk_len;
+ cmd++;
+ }
+
+ spi_sync(wl_to_spi(wl), &m);
}
static irqreturn_t wl1271_irq(int irq, void *cookie)
@@ -312,10 +344,12 @@ static irqreturn_t wl1271_irq(int irq, void *cookie)
return IRQ_HANDLED;
}
-static void wl1271_spi_set_power(struct wl1271 *wl, bool enable)
+static int wl1271_spi_set_power(struct wl1271 *wl, bool enable)
{
if (wl->set_power)
wl->set_power(enable);
+
+ return 0;
}
static struct wl1271_if_operations spi_ops = {
@@ -370,6 +404,8 @@ static int __devinit wl1271_probe(struct spi_device *spi)
goto out_free;
}
+ wl->ref_clock = pdata->board_ref_clock;
+
wl->irq = spi->irq;
if (wl->irq < 0) {
wl1271_error("irq missing in platform data");
@@ -412,9 +448,8 @@ static int __devexit wl1271_remove(struct spi_device *spi)
{
struct wl1271 *wl = dev_get_drvdata(&spi->dev);
- free_irq(wl->irq, wl);
-
wl1271_unregister_hw(wl);
+ free_irq(wl->irq, wl);
wl1271_free_hw(wl);
return 0;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 02:25:40 +0100