---
.../wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 266 ++++++++-------------
1 file changed, 105 insertions(+), 161 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
index 2b527d2a2f8a..06e6a72245a7 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -232,6 +232,52 @@ void brcmf_sdiod_change_state(struct brcmf_sdio_dev
*sdiodev,
sdiodev->state = state;
}
+static int
+brcmf_sdiod_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
+{
+ int err = 0, i;
+ u32 addr;
+
+ addr = (address & SBSDIO_SBWINDOW_MASK) >> 8;
+
+ for (i = 0; i < 3; i++) {
+ brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_SBADDRLOW + i, addr &
0xff,
+ &err);
+ if (err)
+ break;
+
+ addr = addr >> 8;
+ }
+
+ return err;
+}
+
+// bar0 = top 17 bits. lowest of which seems to be SBSDIO_SB_ACCESS_2_4B_FLAG
+// if accessing a different bar, program the bar0 value into
SBSDIO_FUNC1_SBADDRLOW
+// addr loses its top 17 bits and is ORed with SBSDIO_SB_ACCESS_2_4B_FLAG
+// Appears to only be required for 4 byte operations.
+// Value of sdiodev->sbwad is set here and used elsewhere (Why?)
+static int
+brcmf_sdiod_addrprep(struct brcmf_sdio_dev *sdiodev, u32 *addr)
+{
+ uint bar0 = *addr & SBSDIO_SBWINDOW_MASK;
+ int err = 0;
+
+ if (bar0 != sdiodev->sbwad) {
+ printk("WTAF? %08x %08x\n", bar0, sdiodev->sbwad);
+ err = brcmf_sdiod_set_sbaddr_window(sdiodev, bar0);
+ if (err)
+ return err;
+
+ sdiodev->sbwad = bar0;
+ }
+
+ *addr &= SBSDIO_SB_OFT_ADDR_MASK;
+ *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
+
+ return 0;
+}
+
static inline int brcmf_sdiod_f0_writeb(struct sdio_func *func, u8 byte, uint
regaddr)
{
int err_ret;
@@ -250,93 +296,45 @@ static inline int brcmf_sdiod_f0_writeb(struct sdio_func
*func, u8 byte, uint re
return err_ret;
}
-static int brcmf_sdiod_request_data(struct brcmf_sdio_dev *sdiodev, u8 fn,
- u32 addr, u8 regsz, void *data, bool write)
-{
- struct sdio_func *func;
- int ret = -EINVAL;
-
- brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
- write, fn, addr, regsz);
-
- /* only allow byte access on F0 */
- if (WARN_ON(regsz > 1 && !fn))
- return -EINVAL;
- func = sdiodev->func[fn];
-
- switch (regsz) {
- case 1:
- if (write) {
- if (fn)
- sdio_writeb(func, *(u8 *)data, addr, &ret);
- else
- ret = brcmf_sdiod_f0_writeb(func, *(u8 *)data,
addr);
- } else {
- if (fn)
- *(u8 *)data = sdio_readb(func, addr, &ret);
- else
- *(u8 *)data = sdio_f0_readb(func, addr, &ret);
- }
- break;
- case 2:
- if (write)
- sdio_writew(func, *(u16 *)data, addr, &ret);
- else
- *(u16 *)data = sdio_readw(func, addr, &ret);
- break;
- case 4:
- if (write)
- sdio_writel(func, *(u32 *)data, addr, &ret);
- else
- *(u32 *)data = sdio_readl(func, addr, &ret);
- break;
- default:
- brcmf_err("invalid size: %d\n", regsz);
- break;
- }
-
- if (ret)
- brcmf_dbg(SDIO, "failed to %s data F%d@0x%05x, err: %d\n",
- write ? "write" : "read", fn, addr, ret);
-
- return ret;
-}
-
static int brcmf_sdiod_reg_write(struct brcmf_sdio_dev *sdiodev, u32 addr,
u8 regsz, void *data)
{
- u8 func;
- s32 retry = 0;
int ret;
- if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM)
- return -ENOMEDIUM;
-
/*
* figure out how to read the register based on address range
* 0x00 ~ 0x7FF: function 0 CCCR and FBR
* 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
* The rest: function 1 silicon backplane core registers
+ * f0 writes must be bytewise
*/
- if ((addr & ~REG_F0_REG_MASK) == 0)
- func = SDIO_FUNC_0;
- else
- func = SDIO_FUNC_1;
- do {
- /* for retry wait for 1 ms till bus get settled down */
- if (retry)
- usleep_range(1000, 2000);
-
- ret = brcmf_sdiod_request_data(sdiodev, func, addr, regsz,
- data, true);
+ if ((addr & ~REG_F0_REG_MASK) == 0) {
+ if (WARN_ON(regsz > 1))
+ return -EINVAL;
+ ret = brcmf_sdiod_f0_writeb(sdiodev->func[0], *(u8 *)data,
addr);
+ }
+ else {
+ switch (regsz) {
+ case 1:
+ sdio_writeb(sdiodev->func[1], *(u8 *)data,
addr, &ret);
+ break;
+ case 4:
+ ret = brcmf_sdiod_addrprep(sdiodev, &addr);
+ if (ret)
+ goto done;
- } while (ret != 0 && ret != -ENOMEDIUM &&
- retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
+ sdio_writel(sdiodev->func[1], *(u32 *)data,
addr, &ret);
+ break;
+ default:
+ BUG();
+ ret = -EINVAL;
+ break;
+ }
+ }
- if (ret == -ENOMEDIUM)
- brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);
- else if (ret != 0) {
+#if 0
+ if (ret != 0) {
/*
* SleepCSR register access can fail when
* waking up the device so reduce this noise
@@ -349,47 +347,50 @@ static int brcmf_sdiod_reg_write(struct brcmf_sdio_dev
*sdiodev, u32 addr,
brcmf_dbg(SDIO, "failed to write data F%d@0x%05x, err:
%d\n",
func, addr, ret);
}
+#endif
+done:
return ret;
}
static int brcmf_sdiod_reg_read(struct brcmf_sdio_dev *sdiodev, u32 addr,
u8 regsz, void *data)
{
- u8 func;
- s32 retry = 0;
int ret;
- if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM)
- return -ENOMEDIUM;
-
/*
* figure out how to read the register based on address range
* 0x00 ~ 0x7FF: function 0 CCCR and FBR
* 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
* The rest: function 1 silicon backplane core registers
+ * f0 reads must be bytewise
*/
- if ((addr & ~REG_F0_REG_MASK) == 0)
- func = SDIO_FUNC_0;
- else
- func = SDIO_FUNC_1;
-
- do {
- memset(data, 0, regsz);
-
- /* for retry wait for 1 ms till bus get settled down */
- if (retry)
- usleep_range(1000, 2000);
-
- ret = brcmf_sdiod_request_data(sdiodev, func, addr, regsz,
- data, false);
+ if ((addr & ~REG_F0_REG_MASK) == 0) {
+ if (WARN_ON(regsz > 1))
+ return -EINVAL;
+ *(u8 *)data = sdio_f0_readb(sdiodev->func[0], addr, &ret);
+ }
+ else {
+ switch (regsz) {
+ case 1:
+ *(u8 *)data = sdio_readb(sdiodev->func[1],
addr, &ret);
+ break;
+ case 4:
+ ret = brcmf_sdiod_addrprep(sdiodev, &addr);
+ if (ret)
+ goto done;
- } while (ret != 0 && ret != -ENOMEDIUM &&
- retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
+ *(u32 *)data = sdio_readl(sdiodev->func[1],
addr, &ret);
+ break;
+ default:
+ BUG();
+ ret = -EINVAL;
+ break;
+ }
+ }
- if (ret == -ENOMEDIUM)
- brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);
- else if (ret != 0) {
+#if 0
+ if (ret != 0) {
/*
* SleepCSR register access can fail when
* waking up the device so reduce this noise
@@ -402,62 +403,19 @@ static int brcmf_sdiod_reg_read(struct brcmf_sdio_dev
*sdiodev, u32 addr,
brcmf_dbg(SDIO, "failed to read data F%d@0x%05x, err:
%d\n",
func, addr, ret);
}
+#endif
+done:
return ret;
}
-static int
-brcmf_sdiod_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
-{
- int err = 0, i;
- u32 addr;
-
- if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM)
- return -ENOMEDIUM;
-
- addr = (address & SBSDIO_SBWINDOW_MASK) >> 8;
-
- for (i = 0; i < 3; i++) {
- brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_SBADDRLOW + i, addr &
0xff,
- &err);
- if (err)
- break;
-
- addr = addr >> 8;
- }
-
- return err;
-}
-
-static int
-brcmf_sdiod_addrprep(struct brcmf_sdio_dev *sdiodev, u32 *addr)
-{
- uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
- int err = 0;
-
- if (bar0 != sdiodev->sbwad) {
- err = brcmf_sdiod_set_sbaddr_window(sdiodev, bar0);
- if (err)
- return err;
-
- sdiodev->sbwad = bar0;
- }
-
- *addr &= SBSDIO_SB_OFT_ADDR_MASK;
-
- *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
-
- return 0;
-}
u8 brcmf_sdiod_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
{
- u8 data;
+ u8 data = 0;
int retval;
- brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
- retval = brcmf_sdiod_reg_read(sdiodev, addr, sizeof(data), &data);
- brcmf_dbg(SDIO, "data:0x%02x\n", data);
+ retval = brcmf_sdiod_reg_read(sdiodev, addr, 1, &data);
if (ret)
*ret = retval;
@@ -470,15 +428,8 @@ u32 brcmf_sdiod_regrl(struct brcmf_sdio_dev *sdiodev, u32
addr, int *ret)
u32 data = 0;
int retval;
- brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
- retval = brcmf_sdiod_addrprep(sdiodev, &addr);
- if (retval)
- goto done;
- retval = brcmf_sdiod_reg_read(sdiodev, addr, sizeof(data), &data);
-
- brcmf_dbg(SDIO, "data:0x%08x\n", data);
+ retval = brcmf_sdiod_reg_read(sdiodev, addr, 4, &data);
-done:
if (ret)
*ret = retval;
@@ -490,8 +441,7 @@ void brcmf_sdiod_regwb(struct brcmf_sdio_dev *sdiodev, u32
addr,
{
int retval;
- brcmf_dbg(SDIO, "addr:0x%08x, data:0x%02x\n", addr, data);
- retval = brcmf_sdiod_reg_write(sdiodev, addr, sizeof(data), &data);
+ retval = brcmf_sdiod_reg_write(sdiodev, addr, 1, &data);
if (ret)
*ret = retval;
@@ -502,14 +452,8 @@ void brcmf_sdiod_regwl(struct brcmf_sdio_dev *sdiodev, u32
addr,
{
int retval;
- brcmf_dbg(SDIO, "addr:0x%08x, data:0x%08x\n", addr, data);
- retval = brcmf_sdiod_addrprep(sdiodev, &addr);
- if (retval)
- goto done;
-
- retval = brcmf_sdiod_reg_write(sdiodev, addr, sizeof(data), &data);
+ retval = brcmf_sdiod_reg_write(sdiodev, addr, 4, &data);
-done:
if (ret)
*ret = retval;
}
--
2.11.0
