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openwrtv4/package/kernel/mac80211/patches/311-v4.16-0007-brcmfmac-Remove-brcmf_sdiod_request_data.patch
Rafał Miłecki bb04b7ced7 mac80211: brcmfmac: restructuring sdio access functions 
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
2018-03-01 18:07:09 +01:00

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From 993a98a42e6e790fd0d2bf7d55a031513c7ba7dc Mon Sep 17 00:00:00 2001
From: Ian Molton <ian@mnementh.co.uk>
Date: Mon, 13 Nov 2017 21:35:44 +0100
Subject: [PATCH] brcmfmac: Remove brcmf_sdiod_request_data()
This function is obfuscating how IO works on this chip. Remove it
and push its logic into brcmf_sdiod_reg_{read,write}().
Handling of -ENOMEDIUM is altered, but as that's pretty much broken anyway
we can ignore that.
Signed-off-by: Ian Molton <ian@mnementh.co.uk>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
.../wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 237 ++++++++-------------
.../wireless/broadcom/brcm80211/brcmfmac/sdio.h | 2 +-
2 files changed, 87 insertions(+), 152 deletions(-)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -230,6 +230,43 @@ void brcmf_sdiod_change_state(struct brc
sdiodev->state = state;
}
+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 && !err ; i++, addr >>= 8)
+ brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_SBADDRLOW + i,
+ addr & 0xff, &err);
+
+ 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;
+}
+
static inline int brcmf_sdiod_f0_writeb(struct sdio_func *func, u8 byte,
uint regaddr)
{
@@ -249,173 +286,84 @@ static inline int brcmf_sdiod_f0_writeb(
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);
-
- } while (ret != 0 && ret != -ENOMEDIUM &&
- retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
+ 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;
- if (ret == -ENOMEDIUM)
- brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);
+ sdio_writel(sdiodev->func[1], *(u32 *)data, addr, &ret);
+ break;
+ default:
+ WARN(1, "Invalid reg size\n");
+ ret = -EINVAL;
+ break;
+ }
+ }
+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);
-
- } while (ret != 0 && ret != -ENOMEDIUM &&
- retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
-
- if (ret == -ENOMEDIUM)
- brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);
-
- 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 && !err ; i++, addr >>= 8)
- brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_SBADDRLOW + i,
- addr & 0xff, &err);
-
- 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;
+ 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;
- sdiodev->sbwad = bar0;
+ *(u32 *)data = sdio_readl(sdiodev->func[1], addr, &ret);
+ break;
+ default:
+ WARN(1, "Invalid reg size\n");
+ ret = -EINVAL;
+ break;
+ }
}
- *addr &= SBSDIO_SB_OFT_ADDR_MASK;
- *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
-
- return 0;
+done:
+ return ret;
}
u8 brcmf_sdiod_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
@@ -439,15 +387,9 @@ u32 brcmf_sdiod_regrl(struct brcmf_sdio_
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, 4, &data);
-
brcmf_dbg(SDIO, "data:0x%08x\n", data);
-done:
if (ret)
*ret = retval;
@@ -472,13 +414,8 @@ void brcmf_sdiod_regwl(struct brcmf_sdio
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, 4, &data);
-done:
if (ret)
*ret = retval;
}
@@ -886,14 +823,12 @@ brcmf_sdiod_ramrw(struct brcmf_sdio_dev
return bcmerror;
}
-int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
+int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, u8 fn)
{
- char t_func = (char)fn;
brcmf_dbg(SDIO, "Enter\n");
/* issue abort cmd52 command through F0 */
- brcmf_sdiod_request_data(sdiodev, SDIO_FUNC_0, SDIO_CCCR_ABORT,
- 1, &t_func, true);
+ brcmf_sdiod_reg_write(sdiodev, SDIO_CCCR_ABORT, 1, &fn);
brcmf_dbg(SDIO, "Exit\n");
return 0;
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h
@@ -339,7 +339,7 @@ int brcmf_sdiod_ramrw(struct brcmf_sdio_
u8 *data, uint size);
/* Issue an abort to the specified function */
-int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, uint fn);
+int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, u8 fn);
void brcmf_sdiod_sgtable_alloc(struct brcmf_sdio_dev *sdiodev);
void brcmf_sdiod_change_state(struct brcmf_sdio_dev *sdiodev,
enum brcmf_sdiod_state state);
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