From 545f1da8ef0f20923feb500bcfaf0e2fb6068fb4 Mon Sep 17 00:00:00 2001 From: Juuso Oikarinen Date: Thu, 8 Oct 2009 21:56:23 +0300 Subject: wl1271: Implementation for SPI busy word checking This patch adds implementation for checking for SPI busy words - i.e. honoring a delay request from the WLAN chipset upon reading registers/memory. To optimized the average SPI ready by 32 bits, also configure the number of busywords to one to disable the "fixed-busy-word" functionality. Signed-off-by: Juuso Oikarinen Reviewed-by: Vidhya Govindan Signed-off-by: Luciano Coelho Signed-off-by: John W. Linville --- drivers/net/wireless/wl12xx/wl1271.h | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'drivers/net/wireless/wl12xx/wl1271.h') diff --git a/drivers/net/wireless/wl12xx/wl1271.h b/drivers/net/wireless/wl12xx/wl1271.h index c455dcbae524..957da8c0d9cb 100644 --- a/drivers/net/wireless/wl12xx/wl1271.h +++ b/drivers/net/wireless/wl12xx/wl1271.h @@ -107,7 +107,13 @@ enum { #define WL1271_FW_NAME "wl1271-fw.bin" #define WL1271_NVS_NAME "wl1271-nvs.bin" -#define WL1271_BUSY_WORD_LEN 8 +/* + * FIXME: for the wl1271, a busy word count of 1 here will result in a more + * optimal SPI interface. There is some SPI bug however, causing RXS time outs + * with this mode occasionally on boot, so lets have two for now. + */ +#define WL1271_BUSY_WORD_CNT 2 +#define WL1271_BUSY_WORD_LEN (WL1271_BUSY_WORD_CNT * sizeof(u32)) #define WL1271_ELP_HW_STATE_ASLEEP 0 #define WL1271_ELP_HW_STATE_IRQ 1 @@ -389,7 +395,7 @@ struct wl1271 { u32 buffer_32; u32 buffer_cmd; - u8 buffer_busyword[WL1271_BUSY_WORD_LEN]; + u32 buffer_busyword[WL1271_BUSY_WORD_CNT]; struct wl1271_rx_descriptor *rx_descriptor; struct wl1271_fw_status *fw_status; -- cgit v1.2.2