diff options
author | Franky Lin <frankyl@broadcom.com> | 2012-05-04 18:27:31 -0700 |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2012-05-15 17:27:56 -0400 |
commit | e9b8d91d5555e64d30c3b972795579e6d8619908 (patch) | |
tree | 784deda314aa31dbc0348811b4a66333a855fe7a | |
parent | 7d9cfc28269b10b19678d7cb57892afec85af8fb (diff) | |
download | blackbird-op-linux-e9b8d91d5555e64d30c3b972795579e6d8619908.tar.gz blackbird-op-linux-e9b8d91d5555e64d30c3b972795579e6d8619908.zip |
brcmfmac: introduce unified register access interface for SDIO
Both brcmf_sdcard_cfg_read/write and brcmf_sdcard_reg_read/write
are used as interface functions for register access of SDIO WiFi
dongle. A unified interface brcmf_sdio_regr/w is introduced in
this patch in order to simplify the interface and keep the
complexity within the lower layer.
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c | 113 | ||||
-rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/sdio_host.h | 12 |
2 files changed, 125 insertions, 0 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c index f971fa8bdbf4..5e719d872d59 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c @@ -233,6 +233,119 @@ brcmf_sdcard_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address) return err; } +static int +brcmf_sdio_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr, + void *data, bool write) +{ + u8 func_num, reg_size; + u32 bar; + s32 retry = 0; + int ret; + + /* + * figure out how to read the register based on address range + * 0x00 ~ 0xFF: function 0 CCCR + * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers + * The rest: function 1 silicon backplane core registers + */ + if ((addr & ~REG_F0_CCCR_MASK) == 0) { + func_num = SDIO_FUNC_0; + reg_size = 1; + } else if ((addr & ~REG_F1_MISC_MASK) == 0) { + func_num = SDIO_FUNC_1; + reg_size = 1; + } else { + func_num = SDIO_FUNC_1; + reg_size = 4; + + /* Set the window for SB core register */ + bar = addr & ~SBSDIO_SB_OFT_ADDR_MASK; + if (bar != sdiodev->sbwad) { + ret = brcmf_sdcard_set_sbaddr_window(sdiodev, bar); + if (ret != 0) { + memset(data, 0xFF, reg_size); + return ret; + } + sdiodev->sbwad = bar; + } + addr &= SBSDIO_SB_OFT_ADDR_MASK; + addr |= SBSDIO_SB_ACCESS_2_4B_FLAG; + } + + do { + if (!write) + memset(data, 0, reg_size); + if (retry) /* wait for 1 ms till bus get settled down */ + usleep_range(1000, 2000); + if (reg_size == 1) + ret = brcmf_sdioh_request_byte(sdiodev, write, + func_num, addr, data); + else + ret = brcmf_sdioh_request_word(sdiodev, write, + func_num, addr, data, 4); + } while (ret != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT); + + sdiodev->regfail = (ret != 0); + if (sdiodev->regfail) + brcmf_dbg(ERROR, "failed with %d\n", ret); + + return ret; +} + +u8 brcmf_sdio_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret) +{ + u8 data; + int retval; + + brcmf_dbg(INFO, "addr:0x%08x\n", addr); + retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false); + brcmf_dbg(INFO, "data:0x%02x\n", data); + + if (ret) + *ret = retval; + + return data; +} + +u32 brcmf_sdio_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret) +{ + u32 data; + int retval; + + brcmf_dbg(INFO, "addr:0x%08x\n", addr); + retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false); + brcmf_dbg(INFO, "data:0x%08x\n", data); + + if (ret) + *ret = retval; + + return data; +} + +void brcmf_sdio_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr, + u8 data, int *ret) +{ + int retval; + + brcmf_dbg(INFO, "addr:0x%08x, data:0x%02x\n", addr, data); + retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true); + + if (ret) + *ret = retval; +} + +void brcmf_sdio_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr, + u32 data, int *ret) +{ + int retval; + + brcmf_dbg(INFO, "addr:0x%08x, data:0x%08x\n", addr, data); + retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true); + + if (ret) + *ret = retval; +} + u32 brcmf_sdcard_reg_read(struct brcmf_sdio_dev *sdiodev, u32 addr) { int status; diff --git a/drivers/net/wireless/brcm80211/brcmfmac/sdio_host.h b/drivers/net/wireless/brcm80211/brcmfmac/sdio_host.h index 6df06cfe543a..d6ed2d84d0fb 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/sdio_host.h +++ b/drivers/net/wireless/brcm80211/brcmfmac/sdio_host.h @@ -40,6 +40,10 @@ /* Maximum number of I/O funcs */ #define SDIOD_MAX_IOFUNCS 7 +/* mask of register map */ +#define REG_F0_CCCR_MASK 0xFF +#define REG_F1_MISC_MASK 0x1FFFF + /* as of sdiod rev 0, supports 3 functions */ #define SBSDIO_NUM_FUNCTION 3 @@ -186,6 +190,14 @@ brcmf_sdcard_reg_read(struct brcmf_sdio_dev *sdiodev, u32 addr); extern u32 brcmf_sdcard_reg_write(struct brcmf_sdio_dev *sdiodev, u32 addr, u32 data); +/* sdio device register access interface */ +extern u8 brcmf_sdio_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret); +extern u32 brcmf_sdio_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret); +extern void brcmf_sdio_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr, + u8 data, int *ret); +extern void brcmf_sdio_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr, + u32 data, int *ret); + /* Indicate if last reg read/write failed */ extern bool brcmf_sdcard_regfail(struct brcmf_sdio_dev *sdiodev); |